SRAN9.0 GSM Multi-mode Feature Description 02(20140612)

SRAN9.0

GSM Multi-mode Feature Description Issue

02

Date

2014-06-12

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2014. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are pro vided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd. Address:

Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China

Website:

http://www.huawei.com

Email:

[email protected]

Issue 02 (2014-06-12)

Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

i

Copyright © Huawei Technologies Co., Ltd. 2014. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are pro vided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd. Address:

Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China

Website:

http://www.huawei.com

Email:

[email protected]

Issue 02 (2014-06-12)


i

SRAN9.0 GSM Multi-mode Feature Description

Contents

Contents 1 Multi-mode Evolution .............................. ..................................................... ............................................. ............................................. ....................................... ................ 1 1.1 GSM Multi-mode Basic Features ................................................................................................................................. 1 1.1.1 MRFD-210001 Multi-mode BS Common CPRI Interface(GBTS) .............................................. ............................. 1 1.1.1.1 GBTS and NodeB Common CPRI Interface .......................................................................................................... 1 1.1.2 MRFD-210002 Multi-mode BS RRU/RFU star-connection with s eparate CPRI Interface(GBTS) .......................... 2 1.1.2.1 GBTS and NodeB RRU/RFU star-connection with separate CPRI I nterface ......................................................... 3 1.1.2.2 GBTS and eNodeB RRU/RFU star-connection with separate CPRI Interface ....................................................... 4 1.2 Easy Refarming ............................................................................................................................................................ 6 1.2.1 MRFD-211801 Multi-mode Dynamic Power Sharing(GSM) ................................................................ .................... 6 1.2.1.1 GSM and UMTS UMT S Dynamic Power Sharing .......................................................... ................................................... 6 1.2.2 MRFD-211802 GSM and UMTS Dynamic Spectrum Sharing(GSM) ...................................................................... 8 1.2.3 MRFD-211803 Dynamic MA for GU Dynamic Spectrum Sharing(GSM) ............ ................................................. 10 1.2.4 MRFD-211804 GSM Power Control on I nterference Frequency for GU Small Frequency gap(GSM) .................. 12 1.2.5 MRFD-211703 2.0MHz Central Frequency point separation between GSM and UMTS mode(GSM) .................. 14 1.2.5.1 GSM and UMTS UMT S 2.0MHz Central Frequency point separation ............................................................ ................ 14 1.2.6 MRFD-211806 GSM and LTE Dynamic Power Sharing(GSM) ............................................................. ................ 16 1.2.7 MRFD-090201 GSM and LTE FDD Dynamic Spectrum Sharing(GSM) ............................................ ................... 18 1.3 SingleSite ............................................................. ................................................................. ...................................... 22 1.3.1 MRFD-211501 IP-Based Multi-mode Co-Transmission on BS side(GBTS) .......................................................... 22 1.3.1.1 IP-based Dual-Mode Co-Transmission between BTS and NodeB ................................................................ ....... 22 1.3.1.2 IP-Based Dual-Mode Co-Transmission between GBTS and eNodeB .................................................................. 25 1.3.1.3 IP-based Triple-Mode Co-Transmission Among BTS, NodeB, and eNodeB ....................................................... 28 1.3.2 MRFD-211504 TDM-Based Multi-mode Co-Transmission via Backplane on BS s ide(GBTS) ............................. 30 1.3.2.1 TDM-Based GBTS and NodeB Co-Transmission via Backplane......................................................................... 31 1.3.3 MRFD-211505 Bandwidth sharing of MBTS Multi-mode Multi -mode Co-Transmission(GBTS) ............................................. 32 1.3.3.1 Bandwidth sharing of GBTS and NodeB Co-Transmission ...................................................... ........................... 32 1.3.3.2 Bandwidth sharing of GBTS and eNodeB Co-Transmission ................................................................ ................ 35 1.3.3.3 Bandwidth sharing of GBTS, NodeB and eNodeB Co-Transmission ....................................... ........................... 37 1.3.4 MRFD-211601 Multi-mode BS Common Reference Clock(GBTS) ................................................................ ....... 39 1.3.4.1 GBTS and NodeB Common Reference Clock ................................................................ ...................................... 39 1.3.4.2 GBTS and eNodeB Common Reference Clock ............................................................................................... ..... 41 1.3.4.3 GBTS, NodeB and eNodeB Common Reference Clock ............................................................ ........................... 43 1.3.5 MRFD-211602 Multi-mode BS Common IPSec(GSM) ............................................................... ........................... 45

Issue 02 (2014-06-12)


ii


Contents

1.4 Power Consumption Saving........................................................................................................................................ 46 1.4.1 MRFD-211901 Multi-RAT Carrier Joint Intelligent Shutdown (GBT S) ................................................................. 46 1.4.1.1 Cell Joint Shutdown in GU Scenarios................................................................................................................... 47 1.4.1.2 Carrier Joint Intelligent Shutdo wn in GL Scenarios ..................................................................................... ........ 49 1.4.1.3 Carrier Joint Intelligent Shutdo wn in GUL Scenarios ............................................................... ........................... 51

2 Acronyms and Abbreviations ................................................................................................... 53

Issue 02 (2014-06-12)


iii


Figures

Figures Figure 1-1 GSM and LTE power sharing ........................................................... ................................................. 17 Figure 1-2 GL dynamic spectrum sharing ........................................................................................... ................ 20 Figure 1-3 Working principles of Multi -RAT Carrier Joint Shutdown as applied to areas covered by GU networks ........................................................ ................................................................. ...................................... 48 Figure 1-4 Working principles of Multi -RAT Carrier Joint Shutdown as applied to areas covered by UL networks ........................................................ ................................................................. ...................................... 50

Issue 02 (2014-06-12)


iv


Tables

Tables Table 2-1 Acronyms and abbreviations ............................................................................................................... 53

Issue 02 (2014-06-12)


v


1 Multi-mode Evolution

1

Multi-mode Evolution

About This Chapter 1.1

GSM Multi-mode Basic Features

1.2

Easy Refarming

1.3

SingleSite

1.4

Power Consumption Saving

1.1 GSM Multi-mode Basic Features 1.1.1 MRFD-210001 Multi-mode BS Common CPRI Interface(GBTS) Availability This feature is available from SRAN1.0. This feature is discontinued from SRAN2.0 and is replaced by the MRFD-210002 Multi-mode BS RRU/RFU star-connection with separate CPRI interface(GBTS) feature.

1.1.1.1 GBTS and NodeB Common CPRI Interface This scenario is available from SRAN1.0.

Summary The GBTS and NodeB can share one fiber optical cable to transmit GU data between the BBU and the RRUs.

Benefits With this feature, only half fiber optical cables are required for deploying a GU dual-mode base station, there greatly reducing the cost of optical modules, fiber optical cables, and related installation and maintenance.

Issue 02 (2014-06-12)


1



Description Data between the GSM or UMTS main control board between RF modules is transmitted on single-mode or multi-mode fiber optical cables through the CPRI interface. In the traditional GU dual-mode solution, the GBTS and NodeB are co-sited, which requires RF modules supporting different modes and fiber optical cables working in corresponding modes. A great number of optical fibers increase the construction costs. With this feature, data transmitted between the BBU and RF modules can be shared on the same fiber optical cable. The following figure assumes that the WBBP board with three CPRI ports serves as the baseband board in the NodeB and the GTMU board with six CPRI ports serves the main control board in the GBTS. With this feature, CPRI interface is shared between the cascaded GTMU and WBBP and the GTMU forwards the UMTS data in the uplink and downlink.

Enhancement None

Dependency 

Controller Hardware NA



Base Station Hardware Only the DBS3900 supports this feature. This feature is discontinued from SRAN2.0 and is replaced by the MRFD-210002 Multi-mode BS RRU/RFU star-connection with separate CPRI interface(GBTS) feature.



MS/UE NA



CN NA



Other NEs NA



Other Features NA



Other Modes This feature must be used together with MRFD-220001 Multi-mode BS Common C PRI Interface(NodeB).

1.1.2 MRFD-210002 Multi-mode BS RRU/RFU star-connection with separate CPRI Interface(GBTS) Availability This feature is available from SRAN2.0.

Issue 02 (2014-06-12)


2



1.1.2.1 GBTS and NodeB RRU/RFU star-connection with separate CPRI Interface This scenario is available from SRAN2.0.

Summary In a dual-star topology, two CPRI ports on the same RF module are connected to baseband processing boards/interface boards of different modes.

Benefits GSM data and UMTS data are transmitted through different CPRI ports on the same RF module. Therefore, GSM and UMTS services can be processed by the same RF module.

Description In GU dual-mode networking scenarios, the two CPRI ports on a multimode RF module are connected to baseband processing boards/interface boards of GSM and UMTS modes, respectively.

Enhancement From SRAN3.0 onwards, the UBRI can be used to expand the number of CPRI ports of GSM mode for the dual-mode networking scenario.

Dependency 




Issue 02 (2014-06-12)

Base Station Hardware Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

3



If more than six RF modules are configured for GSM in a dual-mode base station, the UBRI board must be configured. 

MS/UE NA



CN NA



Other NEs NA



Other Features NA



Other Modes This feature must be activated together with MRFD-220002 Multi-mode BS RRU/RFU star-connection with separate CPRI Interface(NodeB).

1.1.2.2 GBTS and eNodeB RRU/RFU star-connection with separate CPRI Interface This scenario is available from SRAN5.0.

Summary In a dual-star topology, two CPRI ports on the same RF module are connected to baseband processing boards/interface boards of different modes.

Benefits GSM data and LTE data are transmitted through different CPRI ports on the same RF module. Therefore, GSM and LTE services can be processed by the same RF module.

Description In GL dual-mode networking scenarios, the two CPRI ports on a multimode RF module are connected to baseband processing boards/interface boards of GSM and LTE modes, respectively.

Issue 02 (2014-06-12)


4



Enhancement None

Dependency 




Base Station Hardware If more than six RF modules are configured for GSM in a dual-mode base station, the UBRI board must be configured.



MS/UE NA



CN NA



Other NEs NA



Other Features NA



Other Modes This feature must be activated together with MRFD-230002 Multi-mode BS RRU/RFU star-connection with separate CPRI Interface(eNodeB).

Issue 02 (2014-06-12)


5



1.2 Easy Refarming 1.2.1 MRFD-211801 Multi-mode Dynamic Power Sharing(GSM) Availability This feature is available from SRAN5.0.

1.2.1.1 GSM and UMTS Dynamic Power Sharing Summary This feature enables power sharing between GSM and UMTS carriers to improve the utilization of power resources from SRAN5.0.

Benefits This feature improves the network performance and the utilization of the PA power. Because of more power can be used for data service, the average throughput and edge throughput of UMTS cells will be increased. As shown in the following simulation test result in the lab, the cell average throughput increases up to 10%. 

Typical configuration: The power for four GSM carriers, excluding the BCCH carrier, is shared by one UMTS carrier.



Transmit power of each GSM or UMTS cell: 20 W

Scenario

Max. Cell Transmit Power (W)

PCPICH Transmit Power (W)

MAC-hs Cell Average Throughput (kbit/s)

Without DPS

20

2

2582.1

With DPS

30

2

2831.0

The simulation test result shows that an increase of 10 W in the power of an HSPA carrier raises the cell throughput by 10%.

Description The average output power of a GSM carrier is lower than the maximum output power due to power control and, discontinuous transmission (DTX). Based on the multi-carrier technology and SDR technology, the UMTS carrier can share the GSM carrier power of the same power amplifiers. This feature increases the utilization of the power amplifier as well as the HSPA service rate of a UMTS cell. In case of GSM service bursts, the power shared by the UMTS carrier can be reclaimed in the sharing period.

Issue 02 (2014-06-12)


6



Urban scenario is preferred for GSM and UMTS power sharing. The more GSM service carriers are on the same PA, the more abundant power will be shared between GSM and UMTS carriers. The probability of reclaiming GSM power is also reduced.

Enhancement None

Dependency 




Base Station Hardware Only the MRRU and MRFU support this feature. The GSM and UMTS carriers must share the PA.



MS/UE NA



CN NA



Other NEs NA



Other Features The mutually exclusive GSM features are: GBFD-118101 Dynamic Transmit Diversity GBFD-113701 Frequency Hopping (RF hopping, baseband hopping) GBFD-510104 Multi-site Cell MRFD-211806 GSM and LTE Dynamic Power Sharing (GSM) The mutually exclusive UMTS features are: WRFD-010684 2x2 MIMO WRFD-010693 DL 64QAM+MIMO



Other Modes This feature must be activated together with MRFD-221801 Multi-mode Dynamic Power Sharing(UMTS).

Issue 02 (2014-06-12)


7



1.2.2 MRFD-211802 GSM and UMTS Dynamic Spectrum Sharing(GSM) Availability This feature is available from SRAN6.0. *Huawei professional services must be used to analyze whether this feature can be enabled in a specific scenario for the operator.

Summary This feature enables dynamic sharing of spectrum resources between GSM and UMTS networks based on the service loads. When the GSM service load is lower than a specific threshold, some idle GSM spectrum resources are allocated to UMTS. When the GSM s ervice load becomes higher than a specific threshold, the spectrum resources are reclaimed by the GSM network.

Benefits Because UMTS provides higher spectrum efficiency than GSM, dynamic GSM and UMTS frequency sharing improves network throughput without affecting GSM services and KPIs during peak hours. It can also lower the overall cost of supporting data services. According to theoretical analysis, the maximum throughput improves by as much as 50%. After the feature is enabled, the total cost of ownership (TCO) of mobile broadband (MBB) can be reduced, and dynamic GSM/UMTS refarming can be implemented. Moreover, the result of Dynamic Spectrum Sharing (DSS) implementation can guide operators to start static refarming in the suitable time.

Description When peak hours of GSM and UMTS carriers fall in different periods of a day in GSM and UMTS co-existence networks, this feature enables the UMTS network to use idle GSM spectrum resources during the off-peak hours of CS services, thereby improving the UMTS network capacity. During peak hours of CS services, the shared GSM spectrum resources can be reclaimed for use by the GSM network. During network design, an operator can divide its GSM spectrum resources into three parts: exclusive GSM frequencies, exclusive UMTS frequencies, and GSM/UMTS shared frequencies. Normally, GSM/UMTS shared frequencies are used by GSM carriers. When the GSM service load is low, the GU SDR RF module deactivates GSM carriers that use shared GSM/UMTS frequencies, activates a UMTS carrier, and then allocates the shared GSM/UMTS frequencies to the activated UMTS carrier. For example, an operator has spectrum resources of a 10 MHz bandwidth. When the GSM network is busy, the 10 MHz bandwidth is used by the GSM network. When the GSM network is idle, a 5 MHz bandwidth is sufficient for GSM services, and the remaining 5 MHz bandwidth can be used by the UMTS network.

Issue 02 (2014-06-12)


8



Only the GU SDR RF module supports this feature, thereby this feature applies to scenarios where GSM and UMTS carriers share the same SDR RF modules. Based on historical traffic statistics, users determine whether a cell meets the conditions for DSS. If the conditions are met, DSS is triggered as scheduled or immediately.

Enhancement None

Dependency 




Base Station Hardware Only 900 MHz MRFU and MRRU support this feature. GSM and UMTS carriers must share the RF module.



MS/UE NA



CN NA



Other NEs The U2000 version must be V200R011. The involved NEs must be managed by the same U2000.



Other Features The prerequisite features and algorithm are as follows: WRFD-010611 HSDPA Enhanced Package WRFD-020106 Load Reshuffling UMTS inter-frequency inter-RAT blind handover algorithm The mutually exclusive features are as follows: GBFD-117001 Flex MAIO GBFD-510104 Multi-site Cell MRFD-211703 2.0MHz Central Frequency point separation between GSM and UMTS mode(GSM) or MRFD-221703 2.0MHz Central Frequency point separation between GSM and UMTS mode(UMTS)

Issue 02 (2014-06-12)


9

SRAN9.0 GSM Multi-mode Feature Description 


Other Modes This feature must be used together with MRFD-221802 Multi-mode Dynamic Spectrum Sharing(UMTS).

1.2.3 MRFD-211803 Dynamic MA for GU Dynamic Spectrum Sharing(GSM) Availability This feature is available from SRAN7.0.

Summary With the GSM and UMTS Dynamic Spectrum Sharing feature that was introduced in SRAN6.0, some idle GSM spectrum resources can be allocated to the UMTS network only after the GSM service has a low volume of traffic that can be carried on the BCCH carrier. The Dynamic MA for GU Dynamic Spectrum Sharing feature introduced in SRAN7.0 enables the GSM network to allocate its spectrums to the UMTS network when the traffic volume of the cell is lighter than the volume which can be carried on two or three carriers. This prolongs the duration for spectrum sharing.

Benefits This feature prolongs spectrum sharing duration by twice to three times that provided by the GU Dynamic Spectrum Sharing feature introduced in SRAN6.0, thereby improving the spectrum efficiency.

Description When conditions for spectrum sharing are met, the BSC performs dynamic MA conversion group by group. First, the BSC hands over UEs making calls on timeslots in the same group to idle timeslots. Then, the BSC performs MA conversion on the vacant timeslots. The frequency spectrum occupied by timeslots carried on basic carriers changes from the basic one plus the shared one to the basic one. The frequency spectrum occupied by timeslots carried on shared carriers changes from the basic one plus the shared one to the shared one. After all timeslots have their occupied frequency spectrums converted, the BSC deactivates the shared carriers. At last, the frequency spectrum occupied by the GSM network changes from the basic one plus the shared one to the basic one. After UMTS gives back the shared GSM spectrum resources, the BSC activates the shared carriers and performs dynamic MA conversion group by group. First, the BSC hands over UEs making calls on timeslots in the same group to idle timeslots. Then, the BSC performs MA conversion on the vacant timeslots. At last, the frequency spectrum occupied by the GSM network changes from the basic one to the basic one plus the shared one.

Issue 02 (2014-06-12)


10



Basic spectrum is the spectrum that is reserved for the GSM network after dynamic MA conversion. Shared spectrum is the spectrum that is shared by the GSM network to the UMTS network.

Enhancement None

Dependency 




Base Station Hardware GSM and UMTS carriers must share the RF module.



MS/UE NA



CN NA



Other NEs The U2000 version must be V200R011. The involved NEs must be managed by the sa me U2000.



Other Features The prerequisite features are as follows: MRFD-211802 GSM and UMTS Multi-mode Dynamic Spectrum Sharing(GSM) MRFD-221802 GSM and UMTS Multi-mode D ynamic Spectrum Sharing(UMTS) GBFD-113701 Frequency Hopping The mutually exclusive features are as follows: GBFD-117001 Flex MAIO Huawei professional services must be used to analyze whether this feature can be enabled in a specific scenario for the operator.



Other Modes This feature must be activated together with MRFD-221803 Dynamic MA for GU Dynamic Spectrum Sharing (UMTS).

Issue 02 (2014-06-12)


11



1.2.4 MRFD-211804 GSM Power Control on Interference Frequency for GU Small Frequency gap(GSM) Availability This feature is available from SRAN7.0.

Summary In small GSM/UMTS frequency spacing scenarios (GU refarming 3.8 MHz and GU refarming 4.2 MHz), the interference of GSM to UMTS in the downlink is reduced by decreasing the transmit power of the GSM frequency that is 2.0 MHz or 2.2 MHz away from the UMTS central frequency, improving downlink HSDPA throughput of UMTS. The following diagrams show GU 3.8 MHz refarming and GU 4.2 MHz refarming.

Benefits In small GSM/UMTS frequency spacing scenarios, the interference of GSM to UMTS in the downlink is reduced by decreasing the transmit power of the GSM frequency that is 2.0 MHz or 2.2 MHz away from the UMTS central frequency, improving downlink HSDPA throughput of UMTS.

Issue 02 (2014-06-12)


12



For GU 3.8MHz bandwidth, the average UMTS cell throughput increases by 5% and the maximum throughput increases by 10% during peak hours. For GU 4.2MHz bandwidth, the average throughput of 64QAM users increases by 1% and the maximum throughput of 64QAM users increases by 3% during peak hours.

Description GSM data is sent in bursts on each TCH by frequency hopping (FH). When the GSM data is transmitted on a frequency that is 2.0 MHz (GU refarming 3.8 MHz) or 2.2 MHz (GU refarming 4.2 MHz) away from the UMTS central frequency, frequency, GSM proactively performs power compression on this frequency frequency to decrease decrease the interference interference to UMTS in the downlink. downlink. To compensate the performance performance loss caused by power compression, GSM performs power compensation on other frequencies. Power compression indicates further power decrease after power control. Power compensation indicates indicates further power increase increase after power power control.

After power compression for interfering frequencies, GSM compensates also the decreased signal level to protect MSs at the edge of a cell from unnecessary handovers.

Enhancement None

Dependency 




Base Station Hardware NA



MS/UE NA



CN NA

Issue 02 (2014-06-12)


13



Other NEs NA



Other Features The prerequisite features are as follows: MRFD-211703 2.0MHz Central Frequency point separation between GSM and UMTS mode (GSM) or WRFD-021001 Flexible frequency bandwidth of UMTS GBFD-113701 Frequency Hopping (RF hopping, baseband hopping)



Other Modes This feature must be used together with MRFD-221804 GSM Power Control on Interference Frequency for GU Small Frequency gap (UMTS).

1.2.5 MRFD-211703 2.0MHz Central Frequency point separation between GSM and UMTS mode(GSM) Availability This feature is available from SRAN6.0.

1.2.5.1 GSM and UMTS 2.0MHz Central Frequency point separation This scenario is available from SRAN6.0.

Summary Huawei supports a minimum of 2.0 MHz central frequency point separation between GSM and UMTS with filter optimization and algorithm enhancement.

Benefits This feature improves frequency utilization by providing 3.8 MHz frequency resource configuration for one carrier of UMTS. Instead of providing 5 MHz bandwidth dedicated to UMTS services, this feature allocates 3.8 MHz bandwidth to the UMTS network and reserves 1.2 MHz bandwidth for the GSM network. This helps expand GSM network capacity. The performance of UMTS 3.8 MHz network is as below:

The throughput of the best cell in the 3.8 MHz UMTS network refers to the throughput of a UMTS cell with GU frequency spacing greater than or equal to 2.6 MHz in a 4x3 or higher frequency reuse pattern. Compared to GSM 3.8MHz, UMTS 3.8 MHz has higher gain; the gain of UMTS 3.8 MHz compared to EDGE is as below: (The 3.8 MHz GSM network can use the S3/3/3 cell configuration. The following table compares the gain of the 3.8 MHz UMTS network

Issue 02 (2014-06-12)


14



compared with the EDGE network. In this table, the peak and average EDGE data rates are calculated based on MCS-9 and MCS-6, respectively.)

Description Currently, for mobile operators, the average revenue per user (ARPU) of voice services decreases continuously, but revenue of data service increases very fast and becomes the main revenue increase resource. According to radio wave propagation features, radio signals are transmitted further at a lower carrier frequency and allow one site to cover a wider area. This makes the UMTS 850 MHz/900 MHz an excellent wide coverage solution. Frequency resources are scarce for operators, especially for the low band 850 MHz/900 MHz frequency. Most operators cannot spare a full 5 MHz bandwidth from the limited low band, but due to fierce competition, these operators still hope to deploy 3G network with non-standard bandwidth and frequency gap on 850 MHz/900 MHz, for example UMTS 3.8 MHz and 2.0 MHz Central Frequency point separation between GSM and UMTS. Huawei makes great efforts on the filter optimization and algorithm to provide the UMTS 3.8 MHz refarming solution with 2.0 MHz central frequency point separation when the GBTS/eGBTS and NodeB are co-sited. Instead of providing 5 MHz bandwidth dedicated to UMTS services, this feature allocates 3.8 MHz bandwidth to the UMTS network and reserves 1.2 MHz bandwidth for the GSM network. This helps expand GSM network capacity. This feature applies to the following scenarios: 

Rural scenario: inter-site distance (ISD) ≥ 2.5 km



GSM frequency: 7.4 MHz and above (continuous frequency ≥ 5MHz)



The GBTS/eGBTS and NodeB are co-sited and cover the same areas, which are covered by UMTS 3.8 MHz.



In a 3.8 MHz UMTS network, HSPA+ has no gain compared with 16QAM, and HSPA+ UEs using 64QAM can achieve only low-speed 16QAM data rates.

Enhancement None

Dependency 




Base Station Hardware UMTS: The GBTS/eGBTS and NodeB must belong to the same operator and be provided by Huawei. They can share a site, BBU, or multi-mode RF module.

Issue 02 (2014-06-12)


15



The NodeB RF module can be MRxU900M V2V3, including RRU3908 V2 900M, MRFU V2 900M, RRU3928 900M, RRU3929 900M, RRU3938 900M, RRU3926 900M, RRU3936 900M, MRFUe 900M, and MRFUd 900M. It also can be MRRU850M V2, including RRU3908 V2 850M. It also can be RRU3908 V1 900M. GSM: NA 

MS/UE NA



CN NA



Other NEs Huawei professional services must be purchased to minimize the KPI losses.



Other Features The prerequisite features are as follows: GBFD-114801 Discontinuous Transmission (DTX) Downlink GBFD-117601 HUAWEI III Power Control Algorithm



Other Modes This feature must be used together with MRFD-221703 2.0MHz Central Frequency point separation between GSM and UMTS mode (UMTS).

1.2.6 MRFD-211806 GSM and LTE Dynamic Power Sharing(GSM) Availability This feature is available from SRAN8.0.

Summary GSM and LTE carriers in a multi-mode base station can share a power amplifier. When peak hours of GSM and LTE carriers fall in different periods of a day or the traffic is not evenly distributed between GSM and LTE carriers, this feature enables the idle power of GSM carriers to be temporarily allocated to LTE carriers during GSM off-peak hours to improve the service performance of LTE cell edge users (CEUs). When GSM peak hours arrive or there are GSM traffic bursts, the power allocated to LTE carriers must be reclaimed.

Benefits This feature improves the throughput of UEs using modulation and coding schemes lower than MCS-9 in LTE cells, because these UEs will be allocated the idle power of GSM carriers. The simulation test result shows that the gains of this feature differ in countryside and urban areas even under the following conditions: 

The 850 MHz frequency band is used.



Each PA provides 5 W power.



The LTE bandwidth is 20 MHz.

In countryside areas, the gains and loss caused by this feature are as follows: 

Issue 02 (2014-06-12)

The LTE throughput is increased by more than 30%.


16





The throughput of CEUs is increased by about 12%.



The average throughput of LTE cells is decreased by less than 2%.

In urban areas, the gains and loss caused by this feature are as follows: 

The LTE throughput is increased by more than 45% of LTE.



The throughput of CEUs is increased by about 15%.



The average throughput of LTE cells is decreased by less than 2%.

Description As indicated by the field test and simulation test result, CEUs have low throughput. Therefore, it is important to improve performance of these CEUs. In a GL dual-mode base station, GSM and LTE carriers can share a PA. Therefore, GSM carriers can share their idle power with LTE carriers when the GSM traffic is low, and LTE carriers allocate the power to UEs using coding schemes lower than MCS-9. This feature improves the performance of these UEs. Before and after the feature is enabled, the pilot power of LTE cells remains the same when the shared power increases. The throughput of LTE CEUs increases but the average throughput of LTE cells may decrease. When GSM peak hours arrive or there are GSM traffic bursts, the shared power must be reclaimed to ensure the performance of GSM services. Figure 1-1 GSM and LTE power sharing

This feature applies to scenarios where GSM and LTE carriers share one PA. This feature requires the following configurations:  

LTE carriers are configured with two transmit channels and two receive channels. Each GSM cell is configured with at least three carriers, and each PA used by LTE also provides power to at least one non-BCCH GSM carrier.

Enhancement None

Issue 02 (2014-06-12)


17



Dependency 




Base Station Hardware All GL dual-mode MRRUs or MRFUs with two transmit channels, or two combined GL dual-mode RF units with one transmit channel.



MS/UE NA



CN NA



Other NEs NA



Other Features The mutually exclusive features on the GSM side are as follows:



−

GBFD-113703 Antenna Frequency Hopping

−

Static Transmit Diversity

−

GBFD-510104 Multi-site Cell

−

MRFD-211801 GSM and UMTS Dynamic Power Sharing (GSM)

−

Dual-PA power sharing of GBFD-118106 Dynamic Power Sharing

Other Modes This feature must be used together with MRFD-231806 Multi-mode Dynamic Spectrum Sharing(LTE).

1.2.7 MRFD-090201 GSM and LTE FDD Dynamic Spectrum Sharing(GSM) Availability This feature is available from SRAN9.0.

Summary This feature applies to scenarios where GL static refarming is being used or to be used, in which some spectrums are shared between GSM and LTE FDD. The ECO6910 or BSC6910 (integrated with the eCoordinator) performs interference coordination between GSM and LTE FDD so that shared spectrums can be allocated and scheduled between the GBTS/eGBTS and eNodeB, thereby improving the throughput and spectrum efficiency in the LTE FDD network.

Benefits 

Smooth refarming The following figure assumes that a bandwidth of 20 MHz is available on the 1800 MHz frequency band.

Issue 02 (2014-06-12)


18





Higher spectrum efficiency The following descriptions assume that a bandwidth of 20 MHz is available on the 1800 MHz frequency band.



−

Before this feature is enabled, the GBTS/eGBTS occupies a bandwidth of 8 MHz and the eNodeB occupies a bandwidth of 10 MHz. In this case, 2 MHz spectrum resources are idle and wasted.

−

After this feature is enabled, the GBTS/eGBTS occupies a bandwidth of 8 MHz during peak hours and the eNodeB can use 12 MHz spectrum resources. The GBTS/eGBTS occupies a bandwidth of 5 MHz during off-peak hours, the GBTS/eGBTS and eNodeB share 3 MHz spectrum resources, and 15 MHz spectrum resources become available for the eNodeB.

Reduced GSM interference and improved network performance (LTE 5 MHz and GSM 8 MHz) Different from a static spectrum configuration, GSM can use shared spectrum resources in GL refarming scenarios, thereby reducing interference in the GSM network and increasing the GSM network performance. This feature enables the GSM network to dynamically use 8 MHz spectrum resources, instead of configured 5 MHz spectrum resources, which decreases the call drop rate by about 0.28% in the GSM network.

Issue 02 (2014-06-12)


19



Description This feature has the following requirements on the network bandwidth and application scenario: 

Both GBTS/eGBTS and eNodeB work in the 1800 MHz frequency band and the GBTS/eGBTS and eNodeB are co-sited with shared coverage and antennas.



After this feature is enabled, the LTE network supports a bandwidth of 10 MHz, 15 MHz, or 20 MHz.



The bandwidth shared by GSM and LTE networks accounts for less than or equal to 1/5 of the total LTE bandwidth. Shared spectrum resources must be symmetrically allocated to the LTE network. For example, the maximum shared bandwidth is 2 MHz, 3 MHz, or 4 MHz if the total LTE bandwidth is 10 MHz, 15 MHz, or 20 MHz, respectively.



The total bandwidth of the GBTS/eGBTS and eNodeB working on the same frequency band must be greater than or equal to the bandwidths of GSM BCCH carriers (2.4 MHz at least) plus the LTE bandwidth with this feature enabled.

When the GBTS/eGBTS and eNodeB are co-sited with shared coverage and antennas, a cell-level GL interference matrix is generated based on GSM measurement report (MR) data and the matrix is saved to the eCoordinator. The GBTS/eGBTS preferentially uses GL shared spectrum resources. Information about carrier-level shared spectrum resources occupied and released by the GSM network is forwarded by the BSC to the eCoordinator. Based on the information and the matrix, the eCoordinator calculates the signal to interference plus noise ratio (SINR) of each RB at the current time in the spectrums shared by the LTE cells enabled with this feature. Then the eCoordinator forwards the SINRs of shared RBs, and occupation information about the GSM shared frequencies corresponding to the shared RBs. The eNodeB determines whether to schedule a shared RB for a user based on its SINR and location information about the user and optimizes the PDCCH scheduling based on the occupation information about the GSM shared frequencies corresponding to the shared RB. This achieves GSM and LTE dynamic spectrum sharing, allocation, and scheduling, thereby improving the throughput and spectrum efficiency in the LTE FDD network. Figure 1-2 shows GL dynamic spectrum sharing. Figure 1-2 GL dynamic spectrum sharing

Issue 02 (2014-06-12)


20



Enhancement None

Dependency 

Controller Hardware None



Base Station Hardware −

The following RF modules support this feature: 1800 MHz MRFUd (2T), RRU3928, RRU3929, RRU3938, RRU3939, RRU3952, and AAU3902.

−

The following baseband processing boards support this feature: UBBPd3, UBBPd4, UBBPd5, and UBBPd6



MS/UE NA



CN NA



Other NEs Devices on the RAN side must be provided by Huawei, including the eCoordinator, BSC, U2000, multi-mode base station, and CME. The ECO6910 or BSC6910 (integrated with the eCoordinator) must be configured.



Other Features The mutually exclusive features on the GSM side are as follows: GBFD-117002 IBCA GBFD-119511 IBCA II GBFD-510104 Multi-site Cell The mutually exclusive features on the LTE side are as follows: LOFD-001051 Compact Bandwidth MRFD-231808 GSM and LTE Buffer Zone Optimization(LTE) LOFD-001076 CPRI Compression LOFD-002007 PCI Collision Detection & Self-Optimization LBFD-00202201 Downlink Static Inter-Cell Interference Coordination LOFD-00101401 Downlink Dynamic Inter-Cell Interference Coordination LBFD-00202202 Uplink Static Inter-Cell Interference Coordination LOFD-00101402 Uplink Dynamic Inter-Cell Interference Coordination LOFD-070205 Adaptive SFN/SDMA LAOFD-070213 Intra-eNodeB UL CoMP Phase II LAOFD-070214 UL CoMP based on Coordinated BBU



Other Modes This feature must be used together with MRFD-090202 GSM and LTE FDD Dynamic Spectrum Sharing(LTE FDD).

Issue 02 (2014-06-12)


21



1.3 SingleSite 1.3.1 MRFD-211501 IP-Based Multi-mode Co-Transmission on BS side(GBTS) Availability This feature is available from SRAN3.0.

1.3.1.1 IP-based Dual-Mode Co-Transmission between BTS and NodeB This scenario is available from SRAN3.0.

Summary Huawei introduced the IP-based Dual-Mode Co-Transmission Between BTS and NodeB function in SRAN3.0. This function dynamically multiplexes BTS and NodeB data onto one transmission link, saving transmission equipment and simplifying the transport network.

Benefits With this function, UMTS data can share GSM transmission resources in the early phase of UMTS network deployment when the U MTS traffic volume is low, which provides the following benefits: 

Reduced investment in transmission equipment



Fewer transmission resources required for the communication between the base station and routers



Simplified transport network and convenient network maintenance



Lower network construction costs or leasing costs



Smooth GSM to UMTS network evolution without adjusting the transport network

Description This function applies to the following sites: 

Sites where multimode base stations are used



Sites where BTSs and NodeBs share cabinets

This function dynamically multiplexes BTS and NodeB data onto one transmission link. With different destination IP addresses, BTS and NodeB data can reach the BSC and RNC, respectively. The following figure shows the working principle of this function.

Issue 02 (2014-06-12)


22



BTS and NodeB share Iub-interface transmission resources. The port for multiplexing BTS and NodeB data can be an E1/T1 port, FE electrical port, FE optical port, GE electrical port, or GE optical port. The following figure shows the implementation of co-transmission on the Iub interface. The GTMU and WMPT are interconnected through FE ports. The GTMU sends BTS data to the WMPT through the FE port. The WMPT then multiplexes BTS and NodeB data onto one transmission link.

This feature implements IP-based co-transmission between the base station and the router. This function must be used with the MRFD-211502 IP-Based GSM and UMTS Co-Transmission on MBSC Side feature to implement end-to-end co-transmission. Versions earlier than SRAN7.0 support main control board- and UTRP-based GSM and UMTS co-transmission through panel interconnection.

Issue 02 (2014-06-12)


23



Enhancement SRAN7.0 supports main control board- and UTRPc-based co-transmission through backplane interconnection. In main control board-based co-transmission through backplane interconnection, the GTMU sends BTS data to the UMPT_U through the BBU backplane. The UMPT_U then sends BTS and NodeB data to the transport network through a co-transmission port. The following figure shows the details.

SRAN8.0 supports co-MPT co-transmission. In co-MPT co-transmission, GSM and UMTS share the UMPT_GU, which sends BTS and NodeB data to the IP network. The following figure shows the details.

It is recommended that you use co-MPT co-transmission or main control board-based co-transmission through backplane interconnection.

Dependency 




Base Station Hardware The GSM and UMTS sides of the base station must share the BBU. A UTRP is required when a GE port is used as the co-transmission port. A UTRP9 is required when a GE electrical port is used as the co-transmission port. A UTRP2 is required when a GE optical port is used as the co-transmission port. A UTRPc is required for UTRPc-based co-transmission through backplane interconnection. A UMPT is required for main control board-based co-transmission through backplane interconnection.

Issue 02 (2014-06-12)


24



A UMPT is required for co-MPT co-transmission. 

MS/UE NA



CN NA



Other NEs NA



Other Features The prerequisite features are as follows: GBFD-118601 Abis over IP or GBFD-118611 Abis IP over E1/T1 WRFD-050402 IP Transmission Introduction on Iub Interface



Other Modes This function must be used together with MRFD-221501 IP-Based Multi-mode Co-Transmission on BS side (NodeB).

1.3.1.2 IP-Based Dual-Mode Co-Transmission between GBTS and eNodeB This scenario is available from SRAN5.0.

Summary Huawei introduced the IP-based Dual-Mode Co-Transmission between BTS and eNodeB function in SRAN5.0. This function dynamically multiplexes BTS and eNodeB data onto one transmission link, saving transmission equipment and simplifying the transport network.

Benefits This function provides the following benefits: 













Smooth GSM to LTE network evolution without adjusting the transport network

Description This function applies to the following sites: 

Sites where multimode base stations are used



Sites where BTSs and eNodeBs share cabinets

This function dynamically multiplexes BTS and eNodeB data onto one transmission link. With different destination IP addresses, BTS and eNodeB data can reach the BSC and MME/S-GW, respectively. The following figure shows the working principle of this function.

Issue 02 (2014-06-12)


25



BTS and eNodeB share S1 interface transmission resources. The port for multiplexing BTS and eNodeB data can be a GE electrical port or GE optical port. The following figure shows the implementation of co-transmission on the S1 interface. The GTMU and LMPT are interconnected through FE ports. The GTMU sends BTS data to the LMPT through the FE port. The LMPT then multiplexes BTS and eNodeB data onto one transmission link.

This feature implements IP-based co-transmission between the base station and the router.

Enhancement SRAN7.0 supports main control board- and UTRPc-based co-transmission through backplane interconnection. In main control board-based co-transmission through backplane interconnection, the GTMU sends BTS data to the LMPT or UMPT_L through the BBU backplane. The LMPT or UMPT_L then sends BTS and eNodeB data to the IP network through a co-transmission port. The following figure shows the details.

Issue 02 (2014-06-12)


26



SRAN8.0 supports co-MPT co-transmission. In co-MPT co-transmission, GSM and LTE share the UMPT_GL, which sends BTS and eNodeB data to the IP network. The following figure shows the details.

It is recommended that you use co-MPT co-transmission or main control board-based co-transmission through backplane interconnection.

Dependency 




Base Station Hardware The GSM and LTE FDD/LTE TDD sides of the base station must share the BBU. A UTRPc is required for UTRPc-based co-transmission through backplane interconnection. A UMPT/LMPT is required for main control board-based co-transmission through backplane interconnection. A UMPT is required for co-MPT co-transmission.



MS/UE NA

Issue 02 (2014-06-12)


27



CN NA



Other NEs NA



Other Features The prerequisite feature is GBFD-118601 Abis over IP or GBFD-118611 Abis IP over E1/T1.



Other Modes This function must be used together with MRFD-231501 IP-Based Multi-mode Co-Transmission on BS side(eNodeB).

1.3.1.3 IP-based Triple-Mode Co-Transmission Among BTS, NodeB, and eNodeB This scenario is available from SRAN7.0.

Summary Huawei introduced the IP-based Triple-Mode Co-Transmission Among BTS, NodeB, and eNodeB function in SRAN7.0. This function dynamically multiplexes BTS, NodeB, and eNodeB data onto one transmission link, saving transmission equipment and simplifying the transport network.

Benefits With this function, UMTS and LTE data can share GSM transmission resources in the early phase of network deployment when UMTS and LTE traffic volume is low, which provides the following benefits: 













Smooth GSM to UMTS and LTE network evolution without adjusting the transport network

Description This function applies to multimode base stations. This function dynamically multiplexes BTS, NodeB, and eNodeB data onto one transmission link. With different destination IP addresses, BTS, NodeB, and eNodeB data can reach the BSC, RNC, and MME/S-GW, respectively. The following figure shows the working principle of this function.

Issue 02 (2014-06-12)


28



The port for multiplexing BTS, NodeB, and eNodeB data can be an FE electrical port, FE optical port, GE electrical port, or GE optical port. The following figure shows the implementation of triple-mode co-transmission on the Abis/Iub/S1 interface. The GTMU sends BTS data to the UCIU through the BBU backplane. The WMPT sends NodeB data to the UCIU, also through the BBU backplane. The UCIU then sends the data to the UMPT (L), which multiplexes the data of the three modes onto one transmission link.

Enhancement SRAN8.0 supports co-MPT co-transmission. In co-MPT co-transmission, GSM, UMTS, and LTE share the UMPT_GUL, which sends BTS, NodeB, and eNodeB data to the IP network. The following figure shows the details.

Issue 02 (2014-06-12)


29



It is recommended that you use co-MPT co-transmission.

Dependency 




Base Station Hardware A UMPT/LMPT is required for main control board-based co-transmission through backplane interconnection. A UMPT is required for co-MPT co-transmission.



MS/UE NA



CN NA



Other NEs NA



Other Features The prerequisite features are as follows: GBFD-118601 Abis over IP or GBFD-118611 Abis IP over E1/T1 WRFD-050402 IP Transmission Introduction on Iub Interface



Other Modes This function must be used together with MRFD-231501 IP-Based Multi-mode Co-Transmission on BS side (eNodeB) and MRFD-221501 IP-Based Multi-mode Co-Transmission on BS side (NodeB).

1.3.2 MRFD-211504 TDM-Based Multi-mode Co-Transmission via Backplane on BS side(GBTS) Availability This feature is available from SRAN3.0.

Issue 02 (2014-06-12)


30



1.3.2.1 TDM-Based GBTS and NodeB Co-Transmission via Backplane Summary With this function, BTS and NodeB data can share the SDH/PDH network.

Benefits This function provides the following benefits: 

This function minimizes infrastructure costs for operators, especially in the UMTS deployment phase when the network load is light.



The UMTS UTRAN and the GSM BSS use the same physical medium to transmit user-plane and control-plane data.



Compared with traditional GSM and UMTS co-transmission solutions, the Huawei multimode base station supports GSM and UMTS TDM co-transmission via backplane without additional external E1/T1 ports.

Description With the timeslot cross connection function, BTS and NodeB data can be multiplexed onto the same SDH network. The R NC and NodeB can use the fractional ATM function or fractional IP function to map ATM cells or IP packets to several timeslots on E1 links. The following figure shows the working principle of this function.

TDM timeslots can be shared by GSM and UMTS to implement TDM-based co-transmission on the Abis interface or Iub interface. The following figure shows that the sharing is based on the Iub interface. The UMTS data is transferred on some E1 timeslots using fractional ATM or fractional IP, and then the GSM data is transferred on the remaining E1 timeslots. The NodeB provides the timeslot cross connection function.

The following figure shows that the sharing is based on the Abis interface. The GSM data is transferred on some E1 timeslots, and then the UMTS data is transferred on the remaining E1

Issue 02 (2014-06-12)


31



timeslots using fractional ATM or fractional IP. The BTS provides the timeslot cross connection function.

Enhancement None

Dependency 




Base Station Hardware The GSM and UMTS sides of the multi-mode base station must share the BBU.



MS/UE NA



CN NA



Other NEs NA



Other Features The prerequisite feature is WRFD-050302 Fractional ATM Function on Iub Interface or WRFD-050411 Fractional IP Function on Iub Interface.



Other Modes This function must be used together with MRFD-221504 TDM-Based Multi-mode Co-Transmission via Backplane on BS side (NodeB).

1.3.3 MRFD-211505 Bandwidth sharing of MBTS Multi-mode Co-Transmission(GBTS) Availability This feature is available from SRAN5.0.

1.3.3.1 Bandwidth sharing of GBTS and NodeB Co-Transmission This scenario is available from SRAN5.0.

Issue 02 (2014-06-12)


32



Summary This feature provides a transmission resource management solution for the following scenarios: multimode base station with common transmission of IP over FE/GE or IP over E1/T1; separately configured RNC and BSC or unified configured multimode base station controller. Operators can configure a common transmission resource management policy for GSM and UMTS services using parameters such as the transmission priority and transmission bandwidth. In the case of transmission resource congestion, this feature ensures the continuity of GSM and UMTS high-priority services and the dynamic sharing of transmission resources for GSM and UMTS services. For example, in a multimode base station with a bottleneck bandwidth of 4 Mbit/s, the base station can automatically check the congestion status and then reduce the throughput for lower-priority services (such as HSDPA services) to some extent to guarantee the continuity of high-priority services and the dynamic sharing of the 4 Mbit/s bandwidth.

Benefits With separately configured RNC and BSC or unified configured multimode base station controller, a multimode base station with common transmission ensures that GSM and UMTS can dynamically share all the transmission resources with condition. In the case of transmission resource congestion, the continuity of GSM and UMTS high-priority services will be guaranteed; when the demand for GSM services decreases or even becomes unnecessary, the bandwidth is gradually occupied by UMTS services, thereby enabling smooth transmission evolution.

Description There is a large margin for multiplexing transmission resources because peak load shifts between GSM and UMTS services. In this situation, operators can use GSM and UMTS common transmission to save transmission resources and use the transmission resource management policy to guarantee the continuity of high-priority services and prevent GSM and UMTS services from affecting each other. This feature is applicable to the following scenarios: multimode base station with common transmission of IP over FE/GE or IP over E1/T1; separately configured RNC and BSC or unified configured multimode base station controller.

Issue 02 (2014-06-12)


33



This feature is applicable to the following scenarios: 1.

Both the BSC/RNC or multimode base station controller and the multimode base station use IP over FE/GE.

2.

The BSC/RNC or multimode base station controller uses IP over FE/GE, while the multimode base station uses IP over E1/T1.

3.

Both the BSC/RNC or multimode base station controller and the multimode base station use IP over E1/T1.

GSM and UMTS service priorities are centrally configured to indicate the priority of the GSM and UMTS services for occupying transmission resources. Operators can assign different priorities to GSM and UMTS services, for example, GSM signaling, GSM voice service, GSM high-priority data service, GSM low-priority data s ervice, UMTS signaling, UMTS voice service, UMTS high-priority data service, and UMTS low-priority data service. Services with different priorities correspond to different Differentiated Services Code Point (DSCP) values. Transmission policies are devised based on the priorities of different systems and services. If transmission congestion occurs at a node in the transport network, this node preferentially forwards data packets for high-priority services based on DSCP values. This ensures the QoS of high-priority services. On detecting transmission resource congestion, the multimode base station automatically reduces the bandwidth allocated to low-priority services based on the service priority policies,

Issue 02 (2014-06-12)


34



thereby eliminating congestion. This ensures that the transmission bandwidth actually occupied by GSM and UMTS services always approaches the bottleneck bandwidth.

Enhancement None

Dependency 







MS/UE NA



CN NA



Other NEs NA



Other Features The prerequisite features are as follows: GBFD-118601 Abis over IP or GBFD-118611 Abis IP over E1/T1 MRFD-211501 IP-Based Multi-mode Co-Transmission on BS side (GBTS) WRFD-050402 IP Transmission Introduction on Iub Interface MRFD-221501 IP-Based Multi-mode Co-Transmission on BS side (NodeB)



Other Modes This function must be used together with MRFD-221505 Bandwidth sharing of MBTS Multi-mode Co-Transmission (NodeB).

1.3.3.2 Bandwidth sharing of GBTS and eNodeB Co-Transmission This scenario is available from SRAN7.0

Summary This feature provides a transmission resource management solution for the following scenarios: multimode base station with common transmission of IP over FE/GE or IP over E1/T1. Operators can configure a common transmission resource management policy for GSM and LTE services using parameters such as the transmission priority and transmission bandwidth. In the case of transmission resource congestion, this feature ensures the continuity of GSM and LTE high-priority services and the dynamic sharing of transmission resources for GSM and LTE services. For example, in a multimode base station with a bottleneck bandwidth of 4 Mbit/s, the base station can automatically check the congestion status and then reduce the throughput for lower-priority services (such as HSDPA services) to some extent to guarantee the continuity of high-priority services and the dynamic sharing of the 4 Mbit/s bottleneck bandwidth.

Issue 02 (2014-06-12)


35



Benefits With separately configured BSC or unified configured multimode base station controller, a multimode base station with common transmission ensures that GSM and LTE can dynamically share all the transmission resources with condition. In the case of transmission resource congestion, the continuity of GSM and LTE high-priority services will be guaranteed; when the demand for GSM services decreases or even becomes unnecessary, the bandwidth is gradually occupied by LTE services, thereby enabling smooth transmission evolution.

Description There is a large margin for multiplexing transmission resources because peak load shifts between GSM and LTE services. In this situation, operators can use GSM and LTE common transmission to save transmission resources and use the transmission resource management policy to guarantee the continuity of high-priority services and prevent GSM and LTE services from affecting each other. This feature is applicable to the following scenarios: multimode base station with common transmission of IP over FE/GE or IP over E1/T1; separately configured RNC and BSC or unified configured multimode base station controller.

This feature is applicable to the following three scenarios: 1.


2.


3.

The BSC/RNC or multimode base station controller and the multimode base station use IP over E1/T1, while the CN uses IP over FE/GE.

The GSM and LTE service priorities are centrally configured to indicate the priority of the GSM and LTE services for occupying transmission resources. Operators can assign different priorities to GSM and LTE services, for example, GSM signaling, GSM voice service, GSM high-priority data service, GSM low-priority data s ervice, LTE signaling, LTE voice service, LTE high-priority data service, and LTE low-priority data service. Services with different priorities correspond to different Differentiated Services Code Point (DSCP) values. Transmission policies are devised based on the priorities of different systems and services. If transmission congestion occurs at a node in the transport network, this node preferentially forwards data packets for high-priority services based on DSCP values. This ensures the QoS of high-priority services. On detecting transmission resource congestion, the multimode base station automatically reduces the bandwidth allocated to low-priority services based on the service priority policies,

Issue 02 (2014-06-12)


36



thereby eliminating congestion. This ensures that the transmission bandwidth actually occupied by GSM and LTE services always approaches the bottleneck bandwidth.

Enhancement None

Dependency 







MS/UE NA



CN NA



Other NEs NA



Other Features The prerequisite features are as follows: GBFD-118601 Abis over IP or GBFD-118611 Abis IP over E1/T1 MRFD-211501 IP-Based Multi-mode Co-Transmission on BS side (GBTS) MRFD-231501 IP-Based Multi-mode Co-Transmission on BS side (eNodeB)



Other Modes This function must be used together with MRFD-231505 Bandwidth sharing of MBTS Multi-mode Co-Transmission (eNodeB).

1.3.3.3 Bandwidth sharing of GBTS, NodeB and eNodeB Co-Transmission This feature is available from SRAN8.0.

Summary This feature provides a transmission resource management solution for the following scenarios: multimode base station with common transmission of IP over FE/GE or IP over E1/T1. Operators can configure a common transmission resource management policy for GSM, UMTS, and LTE services using parameters such as the transmission priority and transmission bandwidth. In the case of transmission resource congestion, this feature ensures the continuity of GSM, UMTS, and LTE high-priority services and the dynamic sharing of transmission resources for these services. For example, in a multimode base station with a bottleneck bandwidth of 4 Mbit/s, the base station can automatically check the congestion status and then reduce the throughput for lower-priority services (such as HSDPA services) to some extent to guarantee the continuity of high-priority services and the dynamic sharing of the 4 Mbit/s bottleneck bandwidth.

Issue 02 (2014-06-12)


37



Benefits With separately configured RNC/BSC or unified configured multimode base station controller, multimode base station with common transmission can ensure that GSM, UMTS, and LTE can dynamically share all the transmission resources with condition. In the case of transmission resource congestion, the continuity of GSM, UMTS, and LTE high-priority services will be guaranteed; when the demand for GSM and UMTS services decreases or even becomes unnecessary, the bandwidth is gradually occupied by LTE services, thereby enabling smooth transmission evolution.

Description There is a large margin for multiplexing transmission resources because peak load shifts among GSM, UMTS, and LTE services. In this situation, operators can use GUL common transmission to save transmission resources and use the transmission resource management policy to guarantee the continuity of high-priority services and prevent GSM, UMTS, and LTE services from affecting each other. This feature is applicable to the following scenarios: multimode base station with common transmission of IP over FE/GE or IP over E1/T1.

This feature is applicable to the following three scenarios: 1.


2.


3.

The BSC/RNC or multimode base station controller and the multimode base station use IP over E1/T1, while the CN uses IP over FE/GE.

The GSM, UMTS, and LTE service priorities are centrally configured to indicate the priority of these services for occupying transmission resources. Operators can assign different priorities to GSM, UMTS, and LTE services, for example, GSM signaling, GSM voice service, GSM high-priority data service, GSM low-priority data service, UMTS signaling, UMTS voice service, UMTS high-priority data service, UMTS low-priority data service, LTE signaling, LTE voice service, LTE high-priority data service, and LTE low-priority data service. Services with different priorities correspond to different Differentiated Services Code Point (DSCP) values. Transmission policies are devised based on the priorities of different systems and services. If transmission congestion occurs at a node in the transport network, this node preferentially forwards data packets for high-priority services based on DSCP values. This ensures the QoS of high-priority services.

Issue 02 (2014-06-12)


38



On detecting transmission resource congestion, the multimode base station automatically reduces the bandwidth allocated to low-priority services based on the service priority policies, thereby eliminating congestion. This ensures that the transmission bandwidth actually occupied by GSM, UMTS, and LTE services always approaches the bottleneck bandwidth.

Enhancement None

Dependency 







MS/UE NA



CN NA



Other NEs NA



Other Features The prerequisite features are as follows: GBFD-118601 Abis over IP or GBFD-118611 Abis IP over E1/T1 WRFD-050402 IP Transmission Introduction on Iub Interface MRFD-211501 IP-Based Multi-mode Co-Transmission on BS side (GBTS) MRFD-221501 IP-Based Multi-mode Co-Transmission on BS side (NodeB) MRFD-231501 IP-Based Multi-mode Co-Transmission on BS side (eNodeB)



Other Modes This function must be used together with the following features: MRFD-221505 Bandwidth sharing of MBTS Multi-mode Co-Transmission (NodeB) MRFD-231505 Bandwidth sharing of MBTS Multi-mode Co-Transmission (eNodeB)

1.3.4 MRFD-211601 Multi-mode BS Common Reference Clock(GBTS) Availability This feature is available from SRAN3.0.

1.3.4.1 GBTS and NodeB Common Reference Clock This scenario is available from SRAN3.0.

Issue 02 (2014-06-12)


39



Summary From SRAN3.0, Huawei multimode base stations provide common reference clock for GSM and UMTS that share one BBU.

Benefits This feature provides common reference clock for GSM and UMTS that share one BBU, thereby saving the CAPEX and OPEX.

Description This feature supports the following application scenarios: 

Common GPS reference clock Common GPS reference clock requires only one set of external equipment and one set of feeder and antenna for a GU dual-mode base station, which reduces the installation costs and deployment costs.



Common BITS reference clock Common BITS reference clock requires only one set of external equipment for a GU dual-mode base station, which saves the costs.



Common E1/T1 reference clock from Abis interface When the Abis interface is based on TDM over E1/T1 and the Iub interface is based on IP over FE/GE, the WMPT can obtain the reference clock from the clock synchronized from the Abis E1/T1 in the GTMU. The clock server is not necessary for UMTS and the cost is saved accordingly.



Common E1/T1 reference clock from Iub interface When common E1/T1 reference clock from Iub interface is used, the GTMU can obtain the reference clock from the clock synchronized from the Iub E1/T1 in the WMPT or UMPT_U. The clock server is not necessary for GSM and the cost is saved accordingly.

Enhancement Enhancement in SRAN5.0: 

Common Ethernet reference clock from Iub interface When common Ethernet reference clock is used, GSM can obtain the reference clock via the BBU backplane from the WMPT or UTRP.



Common IP network 1588V2 reference clock from Iub interface When GSM and UMTS support the 1588V2 reference clock, only one 1588V2 clock server and client are required. GSM can obtain the reference clock via the BBU backplane from the WMPT or UTRP.

Dependency 




Base Station Hardware Common BBU or BBUs inter-connection for GSM and UMTS is required. If a common GPS/BITS reference clock is configured, the BBU must be configured with the Universal satellite Card and Clock Unit (UCIU) board.

Issue 02 (2014-06-12)


40



If a common IEEE1588 V2 reference clock is configured over IP-based Iub, an IP clock server must be configured. 

MS/UE NA



CN NA



Other NEs NA



Other Features Common GPS reference clock: MRFD-210501 BTS/NodeB Clock GBFD-510401 BTS GPS Synchronization Common BITS reference clock: MRFD-210501 BTS/NodeB Clock Common Ethernet reference clock from Iub interface: WRFD-050402 IP Transmission Introduction on Iub Interface GBFD-118202 Synchronous Ethernet WRFD-050502 Synchronous Ethernet Common IP network 1588V2 reference clock from Iub interface: WRFD-050402 IP Transmission Introduction on Iub Interface GBFD-118620 Clock over IP Support 1588V2 WRFD-050501 Clock Sync on Ethernet in Node B



Other Modes This feature must be used together with MRFD-221601 Multi-mode BS Common Reference Clock (NodeB).

1.3.4.2 GBTS and eNodeB Common Reference Clock This scenario is available from SRAN5.0.

Summary From SRAN5.0, Huawei multimode base stations provide common reference clock for GSM and LTE that share one BBU.

Benefits This feature provides common reference clock for GSM and LTE that share one BBU, thereby saving the CAPEX and OPEX.


Issue 02 (2014-06-12)

Common GPS reference clock


41



Common GPS reference clock requires only one set of external equipment and one set of feeder and antenna for a GL dual-mode base station, which reduces the installation costs and deployment costs. 

Common BITS reference clock Common BITS reference clock requires only one set of external equipment for a GL dual-mode base station, which saves costs.



Common E1/T1 reference clock from Abis interface When the Abis interface is based on TDM over E1/T1 and S1 interface is based on IP over FE/GE, the LMPT/UMPT_L can obtain the reference clock from the clock synchronized from the Abis E1/T1 in the GTMU. The clock server is not necessary for LTE and the cost is saved accordingly.



Common E1/T1 reference clock from S1 interface When GSM and LTE share the same transmission interface based on IP over E1/T1 or hybrid transmission based on IP, the GTMU can obtain the reference clock from the clock synchronized from the S1 E1/T1 in the UTRP for LTE mode. The clock server is not necessary for GSM and the cost is saved accordingly.



Common Ethernet reference clock from S1 interface When common Ethernet reference clock is used, GSM can obtain the reference clock via the BBU backplane from the LMPT/UMPT_L or UTRP.



Common IP network 1588V2 reference clock from S1 interface When GSM and LTE support the 1588V2 reference clock, only one 1588V2 clock server and client are required. GSM can obtain the reference clock via the BBU backplane from the LMPT or UMPT_L.

Enhancement None

Dependency 




Base Station Hardware Common BBU or BBUs inter-connection for GSM and LTE is required. If a common GPS/BITS reference clock is configured and the BBU is configured with the UMPT_L/LMPT board with the internal GPS satellite card, the BBU does not need to be configured with the Universal satellite Card and Clock Unit (UCIU) board. If the BBU is not configured with the UMPT_L/LMPT board with the internal GPS satellite card, the BBU must be configured with the USCU board. If a common IEEE1588 V2 reference clock is configured over IP-based S1, an IP clock server must be configured.



MS/UE NA



CN NA



Other NEs NA



Issue 02 (2014-06-12)

Other Features


42



Common GPS reference clock: MRFD-210501 BTS/NodeB Clock GBFD-510401 BTS GPS Synchronization LBFD-00300503 Synchronization with GPS Common BITS reference clock: MRFD-210501 BTS/NodeB Clock LBFD-00300504 Synchronization with BITS Common Ethernet reference clock from S1 interface GBFD-118202 Synchronous Ethernet LOFD-00301301 Synchronization with Ethernet(ITU-T G.8261) Common IP network 1588V2 reference clock from S1 interface: GBFD-118620 Clock over IP Support 1588V2 LOFD-00301302 IEEE1588 V2 Clock Synchronization 

Other Modes This function must be used together with MRFD-231601 Multi-mode BS Common Reference Clock (eNodeB).

1.3.4.3 GBTS, NodeB and eNodeB Common Reference Clock This scenario is available from SRAN7.0.

Summary From SRAN7.0, Huawei multimode base stations provide common reference clock for GSM, UMTS, and LTE when the BBUs are interconnected.

Benefits This feature provides common reference clock for GSM, UMTS, and LTE when the BBUs are interconnected, thereby saving the CAPEX and OPEX.


Common GPS reference clock Common GPS reference clock requires only one set of external equipment and one set of feeder and antenna for a GUL multimode base station, which reduces the installation costs and deployment costs.



Common BITS reference clock Common BITS reference clock requires only one set of external equipment a GUL multimode base station, which saves the costs.



Common E1/T1 reference clock from Abis/Iub interface When the Abis or Iub interface is based on TDM over E1/T1 and the S1 interface is based on IP over GE, the three modes can obtain the reference clock from the clock synchronized from the Abis or Iub E1/T1.



Issue 02 (2014-06-12)

Common Ethernet reference clock from S1 interface


43



When common Ethernet reference clock is used, GSM and UMTS can obtain the reference clock via the BBU backplane from the LMPT or UMPT_L. 

Common IP network 1588V2 reference clock from S1 interface When GSM, UMTS and LTE support 1588V2 reference clock, only one 1588V2 clock server and client are required. GSM and UMTS can obtain the clock via the BBU backplane from the LMPT or UMPT_L.

Enhancement None

Dependency 




Base Station Hardware BBUs of GSM, UMTS and LTE base station shall be inter-connected. If a common GPS/BITS reference clock is configured and the BBU is configured with the UMPT_L/LMPT board with the internal GPS satellite card, the BBU does not need to be configured with the Universal satellite Card and Clock Unit (UCIU) board. Otherwise, the BBU must be configured with the USCU board. If a common IEEE1588 V2 reference clock is configured over IP-based S1, an IP clock server must be configured.



MS/UE NA



CN NA



Other NEs NA



Other Features Common GPS reference clock: MRFD-210501 BTS/NodeB Clock GBFD-510401 BTS GPS Synchronization LBFD-00300503 Synchronization with GPS Common BITS reference clock: MRFD-210501 BTS/NodeB Clock LBFD-00300504 Synchronization with BITS Common Ethernet reference clock from S1 interface: GBFD-118202 Synchronous Ethernet WRFD-050502 Synchronous Ethernet LOFD-00301301 Synchronization with Ethernet(ITU-T G.8261) Common IP network 1588V2 reference clock from S1 interface: GBFD-118620 Clock over IP Support 1588V2 WRFD-050501 Clock Sync on Ethernet in Node B LOFD-00301302 IEEE1588 V2 Clock Synchronization

Issue 02 (2014-06-12)


44



Other Modes This function must be used together with MRFD-221601 Multi-mode BS Common Reference Clock (NodeB) and MRFD-231601 Multi-mode BS C ommon Reference Clock (eNodeB).

1.3.5 MRFD-211602 Multi-mode BS Common IPSec(GSM) Availability This feature is available from SRAN7.0.

Summary Internet Protocol Security (IPSec) tunnels are shared among GSM, UMTS, and LTE modes by using a UMPT board. This ensures security of data transmission.

Benefits 

License fee is calculated based on the number of established IPSec tunnels. Therefore, sharing IPSec tunnels helps reduce operator's security cost.



Sharing IPSec tunnels cuts the number of IP addresses required, reducing the complexity of deploying security networks.

Description IPSec ensures confidentiality, integrity, and usability of data transmission. It provides a security mechanism for base stations in all-IP transmission. IPSec provides security services for the IP layer, and therefore the upper layers, including TCP, UDP, ICMP, and SCTP, can use the security services. IPSec is a protocol suite for securing IP communications. It provides high-quality, interoperable, and cryptography-based security for IP packet transmission. Communication parties ensure the following security characteristics of data transmission on the network by encrypting and authenticating IP packets: 

Confidentiality: User data is encrypted and transmitted in cipher text.



Integrity: The received data is verified to check whether data has been tampered with.



Authentication: Data is verified to confirm the sender of the data.



Anti-replay: To prevent malicious attackers from repeatedly sending captured packets, the receiver will reject duplicate packets.

IPSec tunnels are shared among GSM, UMTS, and LTE modes by using a UMPT board. This ensures security of data transmission.

Issue 02 (2014-06-12)


45



Enhancement None

Dependency 




Base Station Hardware The UMPT or UTRPc board must be configured.



MS/UE NA



CN NA



Other NEs NA



Other Features This feature depends on the GBFD-118601 Abis over IP feature. If IPSec uses digital certificate authentication, this feature also depends on the GBFD-113526 BTS Supporting PKI feature. This feature cannot be used together with the GBFD-117702 BTS Local Switch feature.



Other Modes NA

1.4 Power Consumption Saving 1.4.1 MRFD-211901 Multi-RAT Carrier Joint Intelligent Shutdown (GBTS) Availability This feature is available from SRAN8.0.

Issue 02 (2014-06-12)


46



It can be used in GL and GUL scenarios from SRAN9.0.

1.4.1.1 Cell Joint Shutdown in GU Scenarios This scenario is available from SRAN8.0.

Summary In an area covered by co-sited GSM and UMTS base stations, UMTS cells can be intelligently shut down or restarted based on the traffic volume. When the traffic volume is low, UMTS cells are shut down and GSM cells continue to provide services for all UEs in the area. When the traffic volume on the GSM network increases, UMTS cells are restarted to handle the increased traffic.

Benefits By intelligently shutting down UMTS cells during low-traffic hours, this feature reduces the overall power consumption of the GSM and UMTS networks. This conserves energy, cuts emissions, and reduces the operating expense (OPEX). The total amount of power saved by this feature depends on factors such as the RF unit type and load distribution mode. For example, this feature reduces the average power consumption of the UMTS network by about 6% to 10% a day under the following conditions: 

The load distribution mode is idle (8 hours)+medium load (12 hours)+high load (4 hours).



UMTS cells are shut down for eight hours.

Description When GSM and UMTS base stations are co-sited and cover the same area, the two base stations can use different RF units or different RF channels of the same RF units. During low-traffic hours, related hardware modules for UMTS can be shut down to reduce power consumption. The RNC determines whether a UMTS cell should be shut down based on factors such as the load of the UMTS cell, the load of its co-coverage GSM cells, and user priorities. If a UMTS cell meets shutdown conditions, the RNC hands over multimode UEs on the UMTS network or reselects these UEs to the GSM network and then shuts down the UMTS cell. After the UMTS cell is shut down, GSM cells provide services for all UEs in the area. When the GSM network load increases or the GSM network cannot meet the quality of service (QoS) requirements of multimode UEs, the UMTS cell is restarted.

Issue 02 (2014-06-12)


47



Figure 1-3 Working principles of Multi-RAT Carrier Joint Shutdown as applied to areas covered by GU networks

This feature is recommended for either of the following scenarios: 

The penetration rate of UMTS data services is high and the traffic volume is extremely unbalanced at different times in a day. Examples include office buildings and shopping malls.



The penetration rate of UMTS data services is low. Examples include suburbs and rural areas.

With the rapid development of mobile broadband networks, many users stay connected for 24 hours a day, downloading video, audio, and other types of files. The data service processing of UMTS networks is superior to that in GSM networks. When a UMTS network is shut down, the delay in downloading data will be prolonged due to a decreased download rate. Differentiated services are therefore provided. When there is a high-priority user in a UMTS cell, the UMTS cell is not shut down. If a high-priority user initiates services after the UMTS cell is shut down, the UMTS cell is restarted in a timely manner to ensure quality service for the high-priority user.

Enhancement None

Dependency 

Controller Hardware The BSC and RNC must be purchased from Huawei to support the Iur-g interface between them.






MS/UE UEs support different modes in a multimode network.



CN NA



Other NEs NA

Issue 02 (2014-06-12)


48



Other Features Prerequisite features In UMTS multi-carrier networking scenario, this feature must be used together with WRFD-020122 Multi-Carrier Switch off Based on QoS or WRFD-020117 Multi-Carrier Switch off Based on Traffic Load. Mutually exclusive features This feature cannot be used together with the MRFD-211802 GSM and UMTS Dynamic Spectrum Sharing feature in areas covered by GU networks. Impacted features It is recommended that operators enable this feature together with the WRFD-031000 Intelligently Out of Service feature and the Preferential Allocation of Channels on the BCCH TRX function in areas covered by GU networks. This feature may impact the GBFD-111602 TRX Power Amplifier Intelligent Shutdown feature in areas covered by GU networks.



Other Modes This function must be used together with MRFD-221901 Multi-RAT Carrier Joint Intelligent Shutdown (NodeB).

1.4.1.2 Carrier Joint Intelligent Shutdown in GL Scenarios This scenario is available from SRAN9.0.

Summary In an area covered by co-sited GSM and LTE base stations, LTE cells can be intelligently shut down or restarted based on the traffic volume. When there is no LTE traffic and the GSM cell load is light, LTE cells are shut down and GSM cells continue to provide services for all U Es in the area. When the load on the GSM network increases, LTE cells are restarted to handle the increased traffic.

Benefits By intelligently shutting down LTE cells during low-traffic hours, this feature reduces the overall power consumption of the GSM and LTE networks. This conserves energy, cuts carbon dioxide emissions, and reduces the operating expense (OPEX) for operators.

Description This feature is recommended for either of the following scenarios: 

Areas where the penetration rate of LTE data services is low and traffic volumes are extremely unbalanced at different times in a day in the early phase of LTE network deployment. Examples include shopping malls, office buildings, and stadiums.



Rural areas where the LTE network provides only basic coverage, the penetration rate of LTE terminals and data services is low, and the LTE network is lightly loaded most of the day.

When GSM and LTE base stations are co-sited and cover the same area, the two base stations can use different RF units or different RF channels of the same RF units. When there is no LTE traffic, related hardware modules for LTE can be shut down to reduce power consumption.

Issue 02 (2014-06-12)


49



The eNodeB determines whether an LTE cell can be shut down based on the following conditions: LTE cell load, co-sited GSM cell load requested from the BSC through the RIM procedure, cell shutdown period, and the shutdown of non-basic cells. The eNodeB shuts the LTE cell and the related hardware when the preceding conditions are met. When the cell shutdown period ends or the BSC informs the eNodeB that the load of the co-coverage GSM cells has increased, the eNodeB restarts the LTE cell. Figure 1-4 Working principles of Multi-RAT Carrier Joint Shutdown as applied to areas covered by UL networks

Enhancement None

Dependency 

Controller Hardware The BSC must be purchased from Huawei.



Base Station Hardware The eNodeB must be purchased from Huawei.






CN When the RIM procedure is performed through the CN, the MME and SGSN must support the RIM information exchange.



Other NEs When the RIM procedure is performed through the Huawei proprietary eCoordinator, the eCoordinator must support the exchange of RIM information. The eNodeB and BSC must be connected to the same eCoordinator and support RIM information exchange through the eCoordinator.



Issue 02 (2014-06-12)

Other Features


50



In LTE multi-carrier networking scenario, this feature must be used together with LOFD-001042 Intelligent Power-Off of Carriers in the Same Coverage. In areas covered by UL networks, when the Multi-RAT Carrier Joint Shutdown feature and the LOFD-001036 RAN Sharing with Common Carrier feature are used in the same LTE cell, check co-coverage neighboring UTRAN cells for the LTE cell. If they are independent cells, the Multi-RAT Carrier Joint Shutdown feature may not take effect when UEs of an operator cannot be handed over to the LTE cell. Therefore, it is recommended that the Multi-RAT Carrier Joint Shutdown feature be not used together with the LOFD-001036 RAN Sharing with Common Carrier feature. If they are shared cells and have the same operator as the LTE cell, the Multi-RAT Carrier Joint Shutdown feature can be used together with the LOFD-001036 RAN Sharing with Common Carrier feature. 

Other Modes This function must be used together with MRFD-231901 Multi-RAT Carrier Joint Intelligent Shutdown(eNodeB).

1.4.1.3 Carrier Joint Intelligent Shutdown in GUL Scenarios This scenario is available from SRAN9.0

Summary In an area covered by co-sited GSM, UMTS, and LTE base stations, UMTS and LTE cells can be intelligently shut down during low-traffic hours. GSM cells continue to provide basic coverage and services for all UEs in the area. When the load on the GSM network increases, UMTS and LTE cells are restarted in a timely manner to handle the increased traffic.

Benefits This feature provides the maximum gains of energy conservation. This feature reduces the average power consumption of a UMTS base station by about 6% to 10% a day and reduces the average power consumption of an LTE base station by about 5% to 8%. The power conserved varies according to the load distribution and RF unit configuration.

Description In an area covered by co-sited GSM, UMTS, and LTE base stations, LTE cells are shut down based on the description in Carrier Joint Intelligent Shutdown in UL Scenarios and UMTS cells are shut down based on the description in Cell Joint Shutdown in GU Scenarios. When UMTS and LTE cells that share the same coverage area are shut down, the LTE cell is dynamically shut down based on the description in Carrier Joint Intelligent Shutdown in GL Scenarios. During low-traffic hours, only GSM cells provide basic coverage and services for all UEs in the area. When the cell shutdown period ends or the load of the co-coverage GSM cells has increased, the UMTS and LTE cells are restarted.

Enhancement None

Dependency 

Controller Hardware The BSC and RNC must be provided by Huawei and support the Iur-g interface.

Issue 02 (2014-06-12)


51



Base Station Hardware The eNodeB must be provided by Huawei.






CN When the RIM procedure is performed through the CN, the MME and SGSN must support the exchange of RIM information stipulated in 3GPP Release 9 and later.



Other NEs When the RIM procedure is performed through the Huawei proprietary eCoordinator, the eCoordinator must support the exchange of RIM information. The eNodeB, BSC, and RNC must be connected to the same eCoordinator and support RIM information exchange through the eCoordinator.



Other Features In UMTS multi-carrier networking scenario, this feature must be used together with WRFD-020122 Multi-Carrier Switch off Based on QoS or WRFD-020117 Multi-Carrier Switch off Based on Traffic Load. In LTE multi-carrier networking scenario, this feature must be used together with LOFD-001042 Intelligent Power-Off of Carriers in the Same Coverage.



Other Modes This function must be used together with MRFD-221901 Multi-RAT Carrier Joint Intelligent Shutdown(NodeB) and MRFD-231901 Multi-RAT Carrier Joint Intelligent Shutdown(eNodeB).

Issue 02 (2014-06-12)


52


2

2 Acronyms and Abbreviations

Acronyms and Abbreviations

Table 2-1 Acronyms and abbreviations

Acronyms and Abbreviations

Expansion

E

Enhanced feature

M

Maintenance (No change)

N

New added feature

3G

3 rd Generation Mobile Communication System

3GPP

3rd Generation Partnership Project

AMR

Adaptive Multi-Rate

Abis

Abis Interface

BBU

Baseband Control Unit

BSC

Base Station Controller

CME

Control Management Entity

CN

Core Network

FE

Fast Ethernet

GE

Gigabit Ethernet

GERAN

GSM/EDGE Radio Access Network

GSM

Global System For Mobile Communication

HCS

Hierarchical Cell Structure

LDR

Load Reshuffling

LMPT

LTE Main Processing Transmission unit

Iub

Iub Interface

LTE

Long Term Evolution

Issue 02 (2014-06-12)


53

SRAN9.0 GSM Multi-mode Feature Description 02(20140612)

Recommend Documents