GSM Dynamic Power Sharing(GBSS13.0_02)

GSM Dynamic Power Sharing GBSS13.0

Feature Parameter Description

Issue

02

Date

2012-06-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2012. 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 provided "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 the 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]

GSM BSS GSM Dynamic Power Sharing

Contents

Contents 1 About This Document ......................................................................................................... 1-1 1.1 Scope ...................................................................................................................................... 1-1 1.2 Intended Audience ................................................................................................................... 1-1 1.3 Change History ........................................................................................................................ 1-1

2 Overview ................................................................................................................................ 2-1 3 Technical Description.......................................................................................................... 3-1 3.1 Process of Dynamic Power Sharing.......................................................................................... 3-1 3.2 Initial Channel Allocation .......................................................................................................... 3-2 3.3 Handover Triggered by Insufficient Downlink Power.................................................................. 3-2 3.4 Handover Preventing a High-Level Uplink Signal from Overwhelming a Low-Level Uplink Signal ...................................................................................................................................................... 3-3 3.5 Peak Clipping on Activated Channels ....................................................................................... 3-3

4 Related Features .................................................................................................................. 4-1 5 Impact on the Network ........................................................................................................ 5-1 5.1 Impact on System Capacity ...................................................................................................... 5-1 5.2 Impact on Network Performance .............................................................................................. 5-1

6 Engineering Guidelines ...................................................................................................... 6-1 6.1 When to Use Dynamic Power Sharing ...................................................................................... 6-1 6.2 Information to Be Collected ...................................................................................................... 6-2 6.3 Network Planning ..................................................................................................................... 6-2 6.4 Deploying Dynamic Power Sharing........................................................................................... 6-2 6.5 Performance Optimization ........................................................................................................ 6-2 6.6 Troubleshooting ....................................................................................................................... 6-4

7 Parameters ............................................................................................................................ 7-1 8 Counters ................................................................................................................................ 8-1 9 Glossary ................................................................................................................................. 9-1 10 Reference Documents..................................................................................................... 10-1

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

i


1 About This Document

1 About This Document 1.1 Scope This document describes the GBFD-118106 Dynamic Power Sharing feature, including its functions and technical mechanisms. Technical mechanisms include initial channel allocation, handover triggered by insufficient downlink power, handover preventing a high-level uplink signal from overwhelming a low-level uplink signal, and peak clipping on activated channels.

1.2 Intended Audience This document is intended for: 

Personnel who need to understand the Dynamic Power Sharing feature



Personnel who work with Huawei GSM products

1.3 Change History The section provides information about the changes in different document versions. There are two types of changes, which are defined as follows: 

Feature change: refers to a change in the Dynamic Power Sharing feature of a specific product version.



Editorial change: refers to a change in wording or the addition of information that was not described in the earlier version.

Document Issues The document issues are as follows: 

02 (2012-06-30)



01 (2011-03-31)



Draft A (2011-01-15)

02 (2012-06-30) This is the second release of GBSS13.0. Compared with issue 01 (2011-03-31), 02 (2012-06-30) incorporates the changes described in the following table. Change Type

Change Description

Parameter Change

Feature change

None

None

Editorial change

Added the following chapters:

None

Chapter 4 Related Features Chapter 5 Impact on the Network Chapter 6 Engineering Guidelines

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1 About This Document

01 (2011-03-31) This is the first release of GBSS13.0. Compared with issue Draft A (2011-01-15) of GBSS13.0, issue 01 (2011-03-31) of GBSS13.0 has no change.

Draft A (2011-01-15) This is the draft release of GBSS13.0. This is a new document.

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2 Overview

2 Overview The Dynamic Power Sharing feature maximizes cell coverage to meet the different power requirements of users distributed in different areas of a cell. NOTE

Read the Channel Management Feature Parameter Description, Handover Feature Parameter Description, and Power Control Feature Parameter Description before reading this document.

Due to power control, users distributed in different areas of a cell require different transmit power to access the radio network. Generally, users near the BTS require low transmit power, and users far from the BTS require high transmit power. This feature allocates calls requiring different power to appropriate timeslots based on certain rules. The power of each timeslot is shared by multiple carriers. This ensures that the maximum output power of certain channels is greater than the average available power of carriers, meeting the power requirements of users far from the BTS. Figure 2-1 shows the power sharing principle. Figure 2-1 Power sharing principle Carrier

1 2 3 4 5 6 Power

Average available power of carriers

When the user distribution in a cell changes dynamically, the dynamic transmit power of carriers enabled with this feature can be greater than the average available power of carriers. This increases the cell coverage without changing the power of the power amplifier (PA). This feature includes the following functions: 

Single-PA power sharing, for example, power sharing on the quadruple-transceiver unit (QTRU) and power sharing on a single channel of the multi-carrier remote radio unit (MRRU).



Dual-PA power sharing, for example, power sharing between two channels on the MRRU



Inter-module power sharing, for example, power sharing between two GSM radio frequency units (GRFUs)

The algorithms for these functions are the same.

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3 Technical Description

3 Technical Description 3.1 Process of Dynamic Power Sharing The Dynamic Power Sharing feature is activated when QTRUPWRSHARE is set to DYNAMIC(Dynamic power sharing). Figure 3-1 shows the process of Dynamic Power Sharing. Figure 3-1 Process of Dynamic Power Sharing

Call Access Phase The BSC allocates an initial channel to a call according to the power required by the call and the remaining power on a timeslot occupied by an idle channel.

Call Stable Phase When a call enters the stable phase, the BSC monitors timeslot power every 0.5 second. Based on the monitoring results, the BSC determines whether to perform: 

Handover due to downlink power insufficiency When the current total power of a timeslot exceeds the maximum allowed transmit power of the timeslot, a call is handed over to another timeslot to avoid damage to PAs.



Handover preventing a high-level uplink signal from overwhelming a low-level uplink signal When a timeslot is allocated to two calls that have a large difference in uplink signal strength, the call with a higher-level uplink signal is handed over to another timeslot to prevent affecting the call with a lower-level uplink signal.



Peak clipping on activated channels

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The total transmit power required by all calls in a timeslot may exceed the maximum power supported by the PA. When this occurs, peak clipping is performed on activated channels to avoid damage to radio frequency (RF) devices.

3.2 Initial Channel Allocation During a call setup, the BSC allocates a proper channel according to the power required by the call. 1. Based on the value of CHPWRINSUFFALLOWED, the BSC determines whether to allocate an idle channel in a timeslot with insufficient remaining power to a newly initiated call. 

When CHPWRINSUFFALLOWED is set to NO(No), the BSC will not allocate an idle channel in a timeslot with insufficient remaining power to a newly initiated call. A timeslot is considered to have insufficient remaining power for a newly initiated call when the timeslot meets the following condition: (Power required by the newly initiated call + Power required by all set up calls in the timeslot) > (Maximum output power of the PA + TSPWRRESERVE)



When CHPWRINSUFFALLOWED is set to YES(Yes), an idle channel in a timeslot with insufficient remaining power is allocated to a newly initiated call.

2. The BSC determines the priorities of idle channels based on the power required by the call and the remaining power on the timeslots occupied by the idle channels. Then, it allocates an idle channel with the highest priority to a newly initiated call. 

When MCPAOPTALG is set to OFF(Off), the BSC determines the priorities of idle channels based on the remaining power of its timeslot.



When MCPAOPTALG is set to ON(No), the BSC determines the priorities of idle channels based on the number of idle channels in the timeslot and the remaining power of the timeslot. − When

there is only one idle channel in a timeslot, the priority of the idle channel is negatively related to the absolute value of the difference between the remaining power of the timeslot and the power required by the newly initiated call.

− When

there is more than one idle channel in a timeslot, the priorities of the idle channels are positively related to the remaining power of the timeslot.

3.3 Handover Triggered by Insufficient Downlink Power The BSC measures the total power of each timeslot every 0.5 second. If a timeslot has total power insufficiency for longer than a duration specified by QTRUDNPWRLASTTIME in the time specified by QTRUDNPWRSTATTIME, higher-power calls are handed over to another timeslot. The intra-cell handover is preferentially performed. If no timeslot in the cell meets the handover conditions, an inter-cell handover is performed.

Handover Triggering Conditions A handover is performed when the following conditions are met: 

The total power of the timeslot is insufficient. That is, Total power of the timeslot > Maximum output power of the PA + OUTHOPWROVERLOADTHRESHOLD



The P/N criterion is met. That is, the total power insufficiency of the timeslot lasts for a duration specified by QTRUDNPWRLASTTIME in the time specified by QTRUDNPWRSTATTIME.

Call-Specific Conditions for a Handover 

The channel originally allocated to the call is not on a broadcast control channel (BCCH) carrier.



A full-rate call is preferentially handed over.

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GSM BSS GSM Dynamic Power Sharing 


A handover is preferentially performed for the call with the highest downlink power requirement among all calls allocated non-BCCH-carrier channels.

Target Cell Selection 

The target channel of an intra-cell handover must meet the following requirement: Power required by all activated channels in the same timeslot of the target channel + Power required by the call to be handed over ≤ Maximum output power of the PA + INHOPWROVERLOADTHRESHOLD



The target cell of an inter-cell handover must meet the following requirement: Signal strength of the target cell – Signal strength of the serving cell > INTERCELLHYST BQMARGIN

3.4 Handover Preventing a High-Level Uplink Signal from Overwhelming a Low-Level Uplink Signal If the uplink signal level difference between two calls exceeds 90 dB and the two calls occupy two channels in the same timeslot, the lower-level uplink signal will be overwhelmed by the higher-level signal. When this occurs, the quality of the call with the lower-level uplink signal will deteriorate and a call drop may occur. Therefore, calls with greatly different uplink signal levels must not be allocated to the same timeslot. When QTRUCHANMANGSWITCH is set to YES(Yes), the BSC measures the difference between uplink signal levels every 0.5 second. If the highest uplink signal level of a timeslot is 90 dB higher than the uplink signal level reported by the current channel, the situation is recorded. If this situation lasts for a duration specified by UPRXLEVLASTTIME in the time specified by UPRXLEVSTATICTIME, higher-level calls are handed over to another timeslot.

3.5 Peak Clipping on Activated Channels To ensure that a PA functions properly, the BTS performs peak clipping to reduce the transmit power of all calls on a timeslot when the total power of all calls on this timeslot exceeds the maximum output power of the PA. Dynamic Power Sharing reduces the impact of peak clipping on call quality by properly allocating channels. When the total downlink power required by all activated channels in a timeslot exceeds the total power of a PA, peak clipping is required for activated channels to avoid damage to RF devices. With peak clipping, some power of the activated channels is allocated to new calls. This ensures successful access of new calls and prevents overload of a timeslot (or instantaneous overload is allowed) while limiting the decrease in network quality.

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4 Related Features

4 Related Features Feature Dynamic Power Sharing

Prerequisite Feature GBFD-117601 HUAWEI III Power Control Algorithm

Mutually Exclusive Feature 

The single-PA power sharing function cannot be used together with any of the following features:

GBFD-117002 IBCA (Interference Based Channel Allocation) GBFD-117001 Flex MAIO GBFD-118701 RAN Sharing GBFD-114001 Extended Cell 

For the radio frequency unit (RFU), the dual-PA power sharing function cannot be used together with any of the following features:

GBFD-111602 TRX Power Amplifier Intelligent Shutdown GBFD-118701 RAN Sharing GBFD-113201 Concentric Cell GBFD-114501 Co-BCCH Cell GBFD-113701 Frequency Hopping (RF hopping, baseband hopping) GBFD-117001 Flex MAIO GBFD-118701 RAN Sharing GBFD-114001 Extended Cell 

For the remote radio unit (RRU), the dual-PA power sharing function cannot be used together with any of the following features:

Affected Feature 

GBFD-117602 Active Power Control

If the Dynamic Power Sharing feature has been enabled in a cell, you do not need to enable the Active Power Control feature because the Dynamic Power Sharing feature contains all of its functions. 

GBFD-114801 Discontinuous Transmission (DTX)-Downlink

If power control parameters are not properly set, there will be a high percentage of high signal levels. When this occurs, network performance will not be improved even if Dynamic Power Sharing is enabled and the number of peak clipping attempts is minimized. Therefore, set downlink power control parameters to appropriate values and enable the DTX function before enabling Dynamic Power Sharing.

GBFD-111602 TRX Power Amplifier Intelligent Shutdown GBFD-118701 RAN Sharing GBFD-113201 Concentric Cell GBFD-115902 Transmit Diversity GBFD-118101 Dynamic Transmit Diversity GBFD-117002 IBCA GBFD-117001 Flex MAIO GBFD-114001 Extended Cell GBFD-510104 Multi-site Cell

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5 Impact on the Network

5 Impact on the Network 5.1 Impact on System Capacity The Dynamic Power Sharing feature improves network coverage and network capacity.

5.2 Impact on Network Performance If the power of a timeslot is insufficient after this feature is enabled, the BSC hands over calls on this timeslot to other timeslots. This increases the number of handovers in a cell. When the power required by a call on the timeslot exceeds the maximum transmit power of a transceiver (TRX) module, the TRX module performs peak clipping. This may decrease the PS throughput, increase the call drop rate, and reduce the mean opinion score (MOS).

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6 Engineering Guidelines

6 Engineering Guidelines 6.1 When to Use Dynamic Power Sharing 

When the sites or cells involved in network swap do not meet the requirements in Table 6-1, use static power because the Dynamic Power Sharing feature will negatively affect the key performance indicators (KPIs) of the network.



When the sites or cells involved in network swap meet the requirements in Table 6-1 and static power cannot meet the power requirement of the original network, enable this feature.



If the cell cabinet-top power is lower than the static power before network swap, do not enable this feature after network swap. Instead, adjust the power configuration based on the static power. This is to ensure that the power before the network swap matches that after the network swap and to ensure that the network quality does not decline after the network swap.

Table 6-1 Dynamic power sharing requirements for sites and cells Percentage of PDCHs and SDCCHs

Frequency Resource Load

Distance Between Sites (km)

Traffic Volume on Each Channel (Erl)

≤ 30%

≥ 40%

< 0.8

< 0.70

0.8 to 1.5

< 0.65

1.5 to 2

< 0.63

2 to 3

< 0.57

>3

< 0.50

<1

< 0.70

1 to 1.5

< 0.68

1.5 to 2

< 0.64

2 to 3

< 0.57

>3

< 0.50

< 40%

Method of Calculating FR Load In 1x3 frequency reuse mode, the frequency resource load (FR load) of the network is the ratio of the number of TRXs to the number of frequencies available for frequency hopping. In other frequency reuse modes, the FR load is calculated as an equivalent of the FR load in 1x3 frequency reuse mode. The method of calculating the FR load is as follows: 1. Obtain the frequency planning principle and calculate the total number of available frequencies. Generally, BCCHs adopt loose frequency reuse and TCHs adopt tight frequency reuse. Therefore, the FR load only needs to be calculated TCHs, which means that the number of BCCH frequencies needs to be subtracted from the total number of available frequencies. 2. Calculate the number of TRXs in each cell based on network engineering parameters, and obtain the number of BCCH frequencies that needs to be subtracted from the total number of available frequencies.

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The following formula is used to calculate the FR load for a cell: FR load = (Number of TRXs -1)/(Number of available TCH frequencies/3) For example: In a network that uses baseband frequency hopping and 94 frequencies of P-GSM 19 MHz, the BCCH adopts the 6x3 frequency reuse mode with two protective frequencies. No frequency is reserved for indoor coverage. If there are seven TRXs in a cell, the FR Load of the cell is calculated as follows: FR load = (7 – 1)/{[94 – (6 x 3 + 2)/3]} = 24.3%

Method of Calculating the Distance Between Sites Calculate the distance between a site and its nearest neighboring site based on their longitudes and latitudes. The detailed calculation method is as follows (when the following conditions are met): The longitudes and latitudes of the two sites are (Lon1, Lat1) and (Lon2, Lat2). 

x = (Lon2 - Lon1) x Π x R x Cos{[(Lat1 + Lat2) / 2] x Π/ 180} / 180



y = (Lat2 - Lat1) x Π x R / 180

Then, the distance between the sites is:

Distance  x 2  y 2 / 1000

Where, R (radius of the Earth) = 6.371229 x 1000000 and Π = 3.14159265.

Method of Calculating the Traffic Volume on Each Channel of a Cell Traffic volume on each channel of a cell = Traffic Volume on TCH/Available TCHs 

This formula is used to calculate the traffic volume on each channel of a Huawei GSM cell. The counters Traffic Volume on TCH and Available TCHs in the formula can be extracted from BSC traffic statistics. If you want to calculate the traffic volume on each channel of a cell from other vendors, obtain the appropriate formulas.

6.2 Information to Be Collected Obtain the maximum output power of TRX modules in a cell, the number of carriers configured on each TRX module, and the power of each carrier to determine whether to enable this feature. If the total power of all carriers configured on a TRX module exceeds the maximum output power of the TRX module, enable this feature. Otherwise, do not enable this feature.

6.3 Network Planning N/A

6.4 Deploying Dynamic Power Sharing For details about how to activate, verify, and deactivate this feature, see Configuring Dynamic Power Sharing.

6.5 Performance Optimization Monitoring After enabling the Dynamic Power Sharing feature, observe the counters listed in Table 6-2.

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Table 6-2 Counters to be observed after enabling Dynamic Power Sharing Category

Counter

Counter ID

Assignment and access

Number of Times Power OverLoad

CELL.PWR.OVERLOAD.TIMES

Number of TCH Allocation Failures (Power Deficit)

CELL.TCH.ALLOC.FAIL.TIMES.PWR.OVERL OAD

Peak clipping

Number of Timeslots with Power Decreased by 0.5 dB

TRX.CUT.05DB.POWER.TIMES









Number of Timeslots with Power Decreased by 3.0 dB or Higher


Number of Handover Requests due to Power Deficit

CELL.PWR.OVERLOAD.HO.REQ.TIMERS

Number of Successful Handovers due to Power Deficit

CELL.PWR.OVERLOAD.HO.SUC.TIMERS

Number of Handover Commands due to Power Deficit

CELL.PWR.OVERLOAD.HO.CMD.TIMERS

Handovers due to power insufficiency

Parameter Optimization After this feature is enabled, pay attention to KPIs such as call drop rates, handover success rates, assignment success rates, and congestion rates. 

Assignment and access If the congestion rate increases after this feature is enabled, check whether the increase is caused by an increase in the proportions of the counters Number of Times Power OverLoad and Number of TCH Allocation Failures (Power Deficit). If so, set CHPWRINSUFFALLOWED to YES(Yes).



Peak clipping If Number of MRs on Downlink TCH (Mean Receive Quality Rank 6) and Number of MRs on Downlink TCH (Mean Receive Quality Rank 7) increase notably after this feature is enabled, observe the following counters: − Number

of Timeslots with Power Decreased by 0.5 dB

− Number


− Number


− Number


− Number


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GSM BSS GSM Dynamic Power Sharing − Number


of Timeslots with Power Decreased by 3.0 dB or Higher

The number of peak clipping times is an indication of the power sharing effect. If the number of peak clipping times increases, check whether channel configuration and power control parameters have been adjusted, and continue to observe handover counters related to power insufficiency. 

Handovers due to power insufficiency Counters of this type indicate the number of handovers due to power insufficiency and the success rate of such handovers. − If

excess handovers are performed due to power insufficiency and the handover success rate is low, the overall handover success rate may decrease. In this case, decrease the value for OUTHOPWROVERLOADTHRESHOLD and increase the value for INHOPWROVERLOADTHRESHOLD.

− If

only a few handovers are performed due to power insufficiency, peak clipping may be triggered too many times. In this case, increase the value for OUTHOPWROVERLOADTHRESHOLD and decrease the value for INHOPWROVERLOADTHRESHOLD.

6.6 Troubleshooting N/A

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7 Parameters

7 Parameters Table 7-1 Parameter description Parameter ID

NE

MML Command

Feature ID Feature Name Description

BQMARGIN

BSC6900

ADD GBFD-110 HUAWEI I G2GNCELL(Optional) 601 Handover

Meaning: Difference between the MOD GBFD-510 HUAWEI II downlink receive G2GNCELL(Optional) 501 Handover level of the GBFD-118 Dynamic Power serving cell and 106 Sharing that of a neighboring cell during bad quality handovers. This parameter is used to calculate the bad quality handover hysteresis based on the following formula: Bad quality handover hysteresis = Value of "INTERCELLHY ST" -Value of this parameter Bad quality handovers to a neighboring cell can be triggered when the following condition is met: (Downlink receive level of the neighboring cell after filtering - Downlink receive level of the serving cell after power control compensation) > (Value of "INTERCELLHY ST " - 64) (Value of this

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Parameter ID

NE

7 Parameters

MML Command

Feature ID Feature Name Description parameter - 64). The actual value of this parameter is equal to the GUI value minus 64. GUI Value Range: 0~127 Actual Value Range: -64~63 Default Value: 69 Unit: dB

CHPWRINSUFFALLO BSC6900 WED

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SET GBFD-111 Enhanced GCELLCHMGAD(Opti 005 Channel onal) GBFD-118 Assignment Algorithm 106

Meaning: Whether to allow a multi-density Dynamic Power TRX board, that uses the Sharing dynamic power sharing algorithm to assign channels, to assign a channel to an MS when the remaining power on the multi-density TRX board is less than the power required by the MS. If this parameter is set to YES, a multi-density TRX board that uses the dynamic power sharing algorithm to assign channels cannot assign a channel to an MS when the remaining power on the multi-density TRX board is less than the


7-2


Parameter ID

NE

7 Parameters

MML Command

Feature ID Feature Name Description power required by the MS.If this parameter is set to NO, a multi-density TRX board that uses the dynamic power sharing algorithm to assign channels can assign a channel to an MS when the remaining power on the multi-density TRX board is less than the power required by the MS. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Default Value: YES Unit: None

INHOPWROVERLOA BSC6900 DTHRESHOLD

SET GBFD-111 Enhanced GTRXDEV(Optional) 005 Channel GBFD-118 Assignment Algorithm 106 Dynamic Power Sharing

Meaning: Power overload threshold for triggering incoming handover to the TRX under the prerequisite that the power amplifier of the TRX provides the maximum output power. GUI Value Range: 0~50 Actual Value Range: 0~50 Default Value: 8 Unit: W

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7 Parameters

Parameter ID

NE

MML Command

Feature ID Feature Name Description

INTERCELLHYST

BSC6900

ADD GBFD-110 HUAWEI I G2GNCELL(Optional) 601 Handover

Meaning: Hysteresis value during the MOD GBFD-510 HUAWEI II handovers G2GNCELL(Optional) 501 Handover between cells, GBFD-118 Dynamic Power This value is 106 Sharing used to suppress ping-pong handovers between cells. The actual value of this parameter is equal to the GUI value minus 64. GUI Value Range: 0~127 Actual Value Range: -64~63 Default Value: 68 Unit: dB

MCPAOPTALG

BSC6900


Meaning: If the MCPA Optimization Switch is turned Dynamic Power on, the MCPA priority update Sharing mode is adjusted. GUI Value Range: OFF(Off), ON(On) Actual Value Range: ON, OFF Default Value: OFF Unit: None

OUTHOPWROVERL BSC6900 OADTHRESHOLD

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Meaning: Power overload threshold for triggering outgoing handover from the TRX under the prerequisite

7-4


Parameter ID

NE

7 Parameters

MML Command

Feature ID Feature Name Description that the power amplifier of the TRX provides the maximum output power. If the power overload exceeds this threshold, the TRX triggers outgoing handover for lack of power. GUI Value Range: 0~50 Actual Value Range: 0~50 Default Value: 15 Unit: W

QTRUCHANMANGS BSC6900 WITCH

SET GBFD-110 HUAWEI I Handover GCELLSOFT(Optional 601 ) GBFD-510 HUAWEI II 501 Handover

Meaning: This parameter is used to avoid allocating the calls whose GBFD-118 Dynamic Power signal strengths 106 Sharing differ greatly to the same timeslot. The BSC measures the signal merge conditions on each timeslot every 0.5 seconds. If the difference between the highest signal strength and the lowest signal strength on a timeslot is greater than the value of "UL Signal Strength Difference Threshold", it regards it as a signal merge event.

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Parameter ID

NE

7 Parameters

MML Command

Feature ID Feature Name Description If N signal merge events are consecutively detected among P times of measurements, the forcible intra-cell handover is triggered to switch the call with the highest signal strength to another timeslot in the cell. Here, N indicates "UL Signal Strength Difference Detections", P indicates "UL Signal Strength Difference Maintains". GUI Value Range: NO(Close), YES(Open) Actual Value Range: NO, YES Default Value: NO Unit: None

QTRUDNPWRLASTTI BSC6900 ME

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SET GBFD-110 HUAWEI I Handover GCELLCHMGAD(Opti 601 onal) GBFD-510 HUAWEI II 501 Handover

Meaning: The P/N criteria is used to determine low downlink power GBFD-118 Dynamic Power for multi-density 106 Sharing carriers. If the downlink power of a multi-density carrier remains low during a consecutive P seconds out of N seconds, the


7-6


Parameter ID

NE

7 Parameters

MML Command

Feature ID Feature Name Description downlink power of the multi-density carrier is considered low. This parameter corresponds to the P in the P/N criteria. GUI Value Range: 1~16 Actual Value Range: 1~16 Default Value: 3 Unit: s

QTRUDNPWRSTATTI BSC6900 ME


Meaning: The P/N criteria is used to determine low downlink power GBFD-118 Dynamic Power for multi-density 106 Sharing carriers. If the downlink power of a multi-density carrier remains low during a consecutive P seconds out of N seconds, the downlink power of the multi-density carrier is considered low. This parameter corresponds to the N in the P/N criteria. GUI Value Range: 1~16 Actual Value Range: 1~16 Default Value: 5 Unit: s

QTRUPWRSHARE

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BSC6900



Meaning: Whether to use the statistical multiplexing

7-7


Parameter ID

NE

7 Parameters

MML Command

Feature ID Feature Name Description Dynamic Power algorithm for Sharing multi-density power GUI Value Range: NONE(None), DYNAMIC(Dyna mic power sharing) Actual Value Range: NONE, DYNAMIC Default Value: NONE Unit: None

TSPWRRESERVE

BSC6900


Meaning: Maximum degree by which the output power of the multi-density TRX board can exceed the maximum output power within a short time GUI Value Range: 0~50 Actual Value Range: 0~50 Default Value: 20 Unit: W

UPRXLEVLASTTIME BSC6900

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Meaning: If the difference between uplink receive levels of calls within the GBFD-118 Dynamic Power same timeslot is 106 Sharing greater than "Offset of the difference between uplink received levels" for P seconds among N seconds, the call with weak uplink receive


7-8


Parameter ID

NE

7 Parameters

MML Command

Feature ID Feature Name Description level within the timeslot will be handed over to another timeslot. This parameter corresponds to P in the P/N criterion. GUI Value Range: 1~16 Actual Value Range: 1~16 Default Value: 4 Unit: s

UPRXLEVSTATICTIM BSC6900 E


Meaning: If the difference between uplink receive levels of calls within the GBFD-118 Dynamic Power same timeslot is 106 Sharing greater than "Offset of the difference between uplink received levels" for P seconds among N seconds, the call with weak uplink receive level within the timeslot will be handed over to another timeslot. This parameter corresponds to N in the P/N criterion. GUI Value Range: 1~16 Actual Value Range: 1~16 Default Value: 5 Unit: s

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8 Counters

8 Counters There are no specific counters associated with this feature.

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9 Glossary

9 Glossary For the acronyms, abbreviations, terms, and definitions, see the Glossary.

Issue 02 (2012-06-30)


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10 Reference Documents

10 Reference Documents There is no specific reference document associated with this feature.

Issue 02 (2012-06-30)


10-1

GSM Dynamic Power Sharing(GBSS13.0_02)

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