SRAN Solution

Huawei SingleRAN Solution Description For Indosat RAN & Core RFT (RAN part) Version 1.0 August 10, 2014

HUAWEI TECHNOLOGIES CO., LTD.

SINGLERAN SOLUTION DESCRIPTION

TABLE OF CONTENTS 1 Introduction ...................................................................................................... 5 2 Understanding of INDOSAT Requirements ........................................................ 6 2.1

Analysis of Requirements ..................................................................................................................... 6

2.2

Design Strategy..................................................................................................................................... 6

2.2.1

Keep Leading with State-of-the-art Technology ........................................................................................... 7

2.2.2

Create Maximum Values by Investment Protection ..................................................................................... 7

2.2.3

Bring Best Experience with Network Quality Improvement ......................................................................... 7

3 Scope of Supply................................................................................................. 9 3.1

Overview of SingleRAN Solution........................................................................................................... 9

3.2

List of Proposed Equipment ................................................................................................................. 9

3.3

RAN Modernization Scope.................................................................................................................. 10

3.4

Proposed Products Profile .................................................................................................................. 11

3.4.1

DBS3900 Base Station ................................................................................................................................. 11

3.4.2

BSC6910 (GSM/UMTS) ................................................................................................................................ 14

3.5

Model Network Configuration ........................................................................................................... 15

3.5.1

G900 - 444 ................................................................................................................................................... 15

3.5.2

U2100 – 222 ................................................................................................................................................ 16

3.5.3

L800/L1800 - 111-10MHz/111-10MHz (CA 20 MHz) ................................................................................... 17

4 Network Design Dimensioning ........................................................................ 18 4.1

UMTS BSC6910 Dimensioning ............................................................................................................ 18

4.2

GSM BSC6910 Dimensioning .............................................................................................................. 25

5 Future Evolution ............................................................................................. 27 5.1

GU 900 / GL 1800 Refarming .............................................................................................................. 27

5.1.1

GU 900 Refarming Solution ......................................................................................................................... 27

5.1.2

GL 1800M Refarming Solution .................................................................................................................... 28

5.2

RNC in Pool ......................................................................................................................................... 29

5.3

Evolution From 2WRD to 4WRD ......................................................................................................... 30

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5.4

Network Evolution.............................................................................................................................. 30



G900/D1800 - 444/444 (existing G900-444)................................................................................................... 31



G900/D1800/U2100 - 444/444/222 (existing G900/D1800 - 444/444).......................................................... 31



G900/U2100 - 444/222 (existing G900 - 444) ................................................................................................. 31



D1800/U2100 - 444/222 (existing D1800 - 444) ............................................................................................. 32



L1800 - 1/1/1 - 20 MHz (existing G900/U900/U2100 - 222/111/222)............................................................ 33



L1800 - 111-10 MHz (existing G900/U900/U2100 - 333/111/222) ................................................................ 34



L2300 - 1/1/1 TDD (existing G900/U900/U2100 - 333/111/222) ................................................................... 34

6 MBB User Migration........................................................................................ 35 6.1

Main Modules for User Migration...................................................................................................... 35

6.2

MBB User Migration Implementation Process................................................................................... 38

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Review records

Date

Version

2014-07-25

Description

Author

Document describing the high level design of the solution, the dimensioning rules applied, the resulting detailed design, the evolution/migration strategy. Solution description should be provided for model network and Indosat network evolution where supplier is bidding.

Indosat feedback

2014-08-05

01

Update the product solution description

Laxman, Jian Wang

2014-08-08

01

reviewed

John Duan

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1

Introduction As a major player in the telecommunication industry, Huawei Technologies Co., Ltd. provides robust, flexible, cost-effective and future-oriented mobile solutions to worldwide operators. With Huawei series of outstanding products, successful end-to-end solutions, experienced radio frequency planning as well as excellent services, Huawei believes the cooperation between Indosat and Huawei will be a win-win for each other. This document is drafted to provide a comprehensive description of proposed radio access network solution in accordance to the requirements from Indosat: 

High level solution design



Dimensioning principles and configuration



Future evolution based on the Indosat’s legacy network



Migration from 2G to 3G/LTE

In this proposal Huawei proposes the complete SingleRAN (GSM/UMTS/LTE seamless convergence ) and customized Mobile Broadband Solution which helps Indosat to achieve key strategies with further technical leadership in converging marketing, long-term TCO saving and future-proof evolution. Huawei believes the proposed overall solution can ultimately fulfill the requirements of system capacity alongside with quality of service, ensuring the best of both the project target and the long term market strategy of Indosat. Having taken into consideration the economic scale and the developmental factors at all times, Indosat can take pleasure in effective cost savings on network construction as well as realizing future expansions.

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2

Understanding of INDOSAT Requirements

2.1

Analysis of Requirements Huawei understands following technical requirements shall be fulfilled based on the understanding of INDOSAT’s network. 

Cost Effective Modernization

Indosat is planning to modernize existing GSM 900 MHz/1800 MHz and 3G 2100MHz with flexible extension options for UMTS and LTE. The offer shall include hardware and software capable to provide long term evolution to provide MBB at minimal cost. The multi radio RAN and multi-mode controller with maximal possible convergence that helps to build state-of-the-art network a r e

required. The m o d e r n i z a t i o n s o l u t i o n s h a l l n o t h a v e a n y

c o n s t r a i n t s f o r multi-standard concurrent mode, support available spectrum of Indosat etc. at minimal number of radio units. 

Sustainable Growth in the Broadband Market

For the sustainable growth in the broadband market, Indosat intends to launch competitive and most profitable MBB network. Technically, all offered base stations shall be evolution friendly to support EDGE, HSPA+, some of them to support LTE, which will help Indosat to speed up its MBB network and occupy enough share in the market. 

Cost Efficient Native All IP Platform

The offered solution shall be compatible to existing transmission system and core networks, and capable to migrate network elements towards IP smoothly. The system should be based on “All IP concept”. 

Enhanced Performance

The offered base stations shall have highest possible output power (40W output power per carrier for UMTS), and can be provided for enhanced performance in concurrent mode. 

Advanced Architecture and product for future evolution

From Indosat technical requirements, RRU with 2T and 4R, high output power and MIMO, GUL convergence baseband board, common main control board, multi-mode RNC/BSC/OSS etc are requested, the key expectation is covering the current application and looking for the future evolution.

2.2

Design Strategy Regarding the RFT requirement, the network traffic mode, site configuration are all clear listed, Taking into account the requirements from INDOSAT in mobile market, Huawei focuses on

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bringing modernization solution and future-oriented technologies to build the SingleRAN network for INDOSAT based on 3 Key Strategies. 2.2.1

Keep Leading with State-of-the-art Technology 

Deploy a synergetic network of GSM/UMTS and LTE ready  One Network with SingleRAN “5 Bands, 4 Modes” to realize GSM/UMTS/LTE TDD/ FDD by Distributed Base Station (DBS) for significant TCO saving.  Synergy GSM/UMTS/LTE in different voice and data service scenario.



Build ubiquitous various network  HSPA+@42/84Mbps including both U2100 and U900 in overall capital city and metro cities.  LTE1800 refarming from G1800 for fast rollout to get more value subscribers;  Cost effective site configuration for rural, island, low traffic area to save the investment.



Co-IP transmission for GSM/UMTS/LTE  Applied field-proven IP BSS/RAN for all IP or hybrid E1 and FE/GE.

2.2.2

Create Maximum Values by Investment Protection 

Existing Investment Protection  Huawei will reuse the existing sites resources with the relative methodologies are shown below: 

Rearrange the telecom equipment of the A area moved to B area, e.g. BTS and Power.



Keep and reuse site auxiliaries in one area, like antenna and feeder, DG, Solar and battery.



Future Investment Protection  Huawei will provide SingleRAN products to help INDOSAT protect the coming investment. Huawei SingleRAN products will be ready for future flexible GSM to UMTS, GSM to LTE, UMTS to LTE, etc.

2.2.3



Apply industry leading DBS3900 to accommodate GSM/UMTS/LTE for most scenarios.



Simplify network refarming with SDR RF module with multi-carrier.



Simplify BBU with unified UMPT board and Unified UBBP board.



Simplify site and O&M with unified main control & transmission board (UMPT).

Bring Best Experience with Network Quality Improvement 

Precise network planning and optimization

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 Reasonable network design adjustment from GSM900/1800&UMTS2100 only to GSM900/1800&UMTS900/2100<E1800/2300 coexist.  Accurate scenario division to ensure coverage and BTS load balance. 

Make the Network Visible and Manageable  Perception oriented QoE introduced instead of traditional KPI.  Dynamic hotspot finding and network adjustment based on traffic map.  Fast trouble shooting based on daily healthy check and intelligent tool.



Innovative technology and feature  Crystal Voice, EDGE no Power back off, 3G technologies applied in 2G, HD voice, CS Voice Precise Power Control, LTE voice fallback to 3G/2G, etc.

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3

Scope of Supply Total of RFT offer scope will be two parts, one is Indosat frame excluding Indosat, and another is Indosat with detail regional information. In the group scope, Indosat with Huawei legacy equipments has offered the site prediction sheet per year; we will calculate the price according to group GPL. In Indosat scope, there is the detail site region information; our design will be focus on Indosat part

3.1

Overview of SingleRAN Solution In assisting Indosat to build a cutting-edge network, Huawei proposes the leading and worldwide used SingleRAN solution. The proposed network architecture is shown as follows:

Figure 1: Solution Overview

3.2

List of Proposed Equipment Table 1: List of Proposed Equipments

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3.3

RAN Modernization Scope In group scope, the relative Indosat have collected the future expansion and new site. The following table shows the summary of RAN modernization as well as new site deployment scope of work for Year 2015 to 2017 according to RFP document. Table 2-2 SOW for Swap & expansion, Newly-built in 9 Regions

Region 1 Region 2 Region 3 Region 4 Type Base Station JBRO West Java Central Java East Java Expansion DBS3900 WCDMA 394 Modernization DBS3900 SRAN 23 164 918 1264 New Built DBS3900 SRAN 18 78 217 342 Swap DBS3900 SRAN 14 425 215 203 BTS Swap and Newly-built Scenario The following figures show the overview of typical site solution for Swap Existing Site Scenario and New Site Deployment Scenario. For existing site scenario, power system will be reused. BBU3910 and DC Distribution Unit (DCDU) for RRU will be installed in existing power system according to RFP requirement. As for the New site deployment scenario, new power system as per RFP requirement and APM30(TMC) will be deployed. BBU and DCDU will be housed in APM30.

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Swap Existing Site Scenario

Antenna

AC

DC

Antenna

DCExisting

Power System

Feeders

Jumper/ Feeder

RRU

DCDU

-48vDC Power cable

BBU DDF Unit

CPRI cable

t. t . ta. t a. tt at at B B B B

Incumbent (Indoor)

t. t. t. a t a t at B B B

t. at B

New Site Deployment Scenario

AC

Antenna

New Power System

Jumper/ Feeder

RRU

DC

DCDU BBU

CPRI cable

Batt.

Batt.

Batt.

Batt.

Batt.

Batt.

Batt.

Batt.

DDF Unit

3.4

Proposed Products Profile

3.4.1

DBS3900 Base Station

-48vDC Power cable

APM30 (TMC) outdoor

The DBS3900 mainly consists of the baseband unit (BBU3910) and the Remote Radio Unit (RRU). For distributed installation, the RRU can be placed close to the antenna to reduce feeder loss and improve system coverage, which features small size and high integration to support a zero footprint solution. When RRU are required to be installed indoor, IFS rack can be easily deployed to hold RRU and BBU. Both fulfill the requirements of easy, fast installation and network deployment. For indoor HUAWEI TECH.CO.,LTD

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scenario, one set of DBS3900 can support maximum 18RRUs; for outdoor scenario, one set of DBS3900 can support maximum 12 RRUs. The DBS3900 facilitates site acquisition as well as network planning and optimization, and reduces network deployment time. It enables operators to quickly and efficiently deploy a high-performance GSM/UMTS/LTE network. The following figure provides a view of typical deployment scenarios for the DBS3900.

Figure 2: Overview of Deployment Scenarios of DBS3900

1. Multi-mode & High Output Power Radio Frequency Modules (Indosat) According to INDOSAT’s requirements and Huawei strategy, RF modules selected are listed below:

Figure 3: Huawei Proposed RRU HUAWEI TECH.CO.,LTD

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2. Multi-mode & High Output Power Radio Frequency Modules (Indosat Group)

Figure 4: Huawei proposed RRU for Indosat Group

There are two kinds of RRU in GUL configuration for Indosat:  Typical RRU already used in existing network, RRU3929 & RRU3829.  New Blade RRU proposed in optional solution, RRU3936 & RRU3826 RRU can be mounted on a pole, a wall, a stand, or other place near antenna. The operator can also select other installation modes as required by actual situations. No equipment room or air conditioner is required because the RRU is passively cooled by natural convective cooling, namely the RRU has no fans. Field experience has shown that routine maintenance could be kept low because of the highly reliable operation of the RRU. 3. Single Baseband: BBU3910 The BBU is a small-sized cassette, and can be mounted in any standard cabinet with free space of 19 inches wide and 2U high, which allows the operator fully freely arrange space even only very limited space is available. The BBU3910 performs the following functions:  Manages the entire base station system in terms of operation, maintenance, and system clock.  Provides physical ports for information exchange between the base station and the transport network.  Provides an OM channel between the base station and the LMT, SMT, or U2000.  Processes uplink and downlink baseband signals.  Provides CPRI ports for communication with the RF modules.

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 Provides ports for communication with environment monitoring devices.

Figure 5: BBU3910

The proposed baseband modules inserted in BBU3910 are as below: Table 2: Huawei Proposed Baseband Modules

Module

UMPTb1

Key Attributes 

Universal Management & Processing Unit



GUL multi-mode supported DL+UL throughput: 1.5Gbps



Capacity(GUL concurrent): GSM 24/24/24 + UMTS 18 Cells + LTE 12 Cells

UBBPd4

UBBPd5

UBBPd6



When work as WCDMA Baseband Unit:



Max Cells: 6



Max CE: UL 512/DL768



Max Codes: 6*15



When work as WCDMA Baseband Unit:



Max Cells: 6



Max CE: UL768/DL768



Max Codes: 6*15



GUL Concurrent Configuration (GUL)



GSM TRX: 12



UMTS CELL: 6 (UL/DL: 256/384CE)



LTE Configuration: 3*20M 4T4R

UBBPd6 is a comprehensive board with GUL and high capacity, normally it will be applied in the G+U+L scenario due to the cost, if the site configuration is simple, e.g. GSM only, we don’t recommend UBBPd, +UMPT to support GSM, because UBBPd will be only the interface board connected to RRU. GTMU can be simple configured for GSM only mode. 3.4.2

BSC6910 (GSM/UMTS) The BSC6910 conforms to the trend of higher capacity and fewer sites, saving equipment room space, meeting the requirements of rapid service growth and improves return on equipment investment. The BSC6910 uses new platform of Advanced Radio Controller REV:b (PARCb) and supports a processing capability of 10 Gbit/s per slot. The BSC6910 in later versions supports the evolution to a processing capability of 40 Gbit/s to 100 Gbit/s per slot and to a Tera network.

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The BSC6910 introduces a new general processing board: Evolved General Processing Unit (EGPU). When loaded with different software, the EGPU can be flexibly configured to work in different modes and process the BSC or RNC control plane and user plane services. All the BSC6910 resources are designed in the resource pool mode. The BSC6910 resources consist of control plane resources, user plane resources, and transmission resources. The control plane and user plane resources can be shared to better adapt to the traffic model changes. Table 3: BSC6910 Capacity specification

Specification (GSM) (Based on Huawei traffic model; BSC6910

Item

A IP(10GE)+Abis IPoE1)

Max. num. of cabinet

1

Max. num. of subrack

2

Max. num of TRXs

20,000

Max. voice traffic (Erl)

125,000

Gb throughput (DL+UL) (Mbps)

7680

BHCA (k)

43,333 Specification(UMTS) Item

(Based on Huawei Traffic Model)

Max. num. of cabinet

2

Max. num. of subrack

4

BHCA (k)

64,000

Max. voice traffic (Erlang)

250,000

Iu PS throughput

3.5

(DL+UL) (Mbps)

120,000

Max. num. of Node B

10,000

Max. num of cells

20,000

Model Network Configuration This chapter will focus on the solution description for the Indosat proposed Model Network including BTS/NodeB/eNodeB hardware configurations and BSC/RNC/OSS.

3.5.1

G900 - 444 For the G900-444 configurations, RRU3929 are configured to support GSM 900MHz and GTMUb is configured for the transmission and OAM. In Huawei solution, GSM baseband processing is done in RRU hence we no need to configure extra baseband board for the same purpose. GTMUb provides 6 CPRI interface to connect with RRUs.

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For the BSC part, BSC6910 is configured to support 1000TRx, 2000TRx and 4000TRx and Huawei U2000, an operation and maintenance (O&M) system to centrally manage Huawei mobile network elements is configured for OSS. 3.5.2

U2100 – 222 For the U2100- 222 configurations, RRU3829 are configured to support UMTS2100MHz whereas UBBPd1 is configured for the UMTS baseband processing and UMPTb1 is configured for transmission and OAM. As the capacity of UBBPd1 is 6cells, 384CE UL/512CE DL & 6 CPRI interfaces to connect with RRUs hence one UBBPd1 is enough to support the Indosat requested above configurations.

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For the RNC part, BSC6910 is configured to support 1000Mbps, 2000Mbps and 4000Mbps and Huawei U2000, an operation and maintenance (O&M) system to centrally manage Huawei mobile network elements is configured for OSS. 3.5.3

L800/L1800 - 111-10MHz/111-10MHz (CA 20 MHz) For the L800/L1800- 111-10MHz/111-10MHz configurations, RRU3929 are configured to support LTE1800MHz, RRU3268 are configured to support L800MHz, whereas UBBPd5 is configured for the LTE baseband processing and UMPTb1 is configured for transmission and OAM. As UBBPd5 can support 6*20MHz & 6 CPRI interfaces to connect with RRUs hence one UBBPd5 is enough to support the Indosat requested above configurations.

Huawei U2000, an operation and maintenance (O&M) system to centrally manage Huawei mobile network elements is configured for the OSS.

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4

Network Design Dimensioning

4.1

UMTS BSC6910 Dimensioning This section describes how to configure hardware and calculate the number of required licenses when the BSC6910 works in the UMTS mode. The main hardware components of the BSC6910 UMTS are service processing units, interface boards, clock boards, subracks, and cabinets. The following sections describe the hardware configuration scenarios and configuration methods. The capacity of UMTS BSC6910 depends on the number of EGPUa boards and the hardware actual processing capacity in the traffic model. A maximum of 128 EGPUa boards can be configured on the UMTS BSC6910 with two cabinets, excluding the pair of EGPUa boards fixed for resource management. The EGPUa board can process services on the control plane (CP) and user plane (UP) at one time. In Huawei Smartphone traffic model, a maximum of 64,000,000 BHCA can be achieved on the control plane. In Huawei heavy PS traffic model, the maximum BHCA throughput reaches 120 Gbit/s on the user plane. However the control and user plane cannot reach the maximum value at one time. A BSC6910 can be configured with a maximum of two cabinets. A maximum of three subracks can be configured in each cabinet. The UMTS dimension is used to measure the network capacity based on the number of users and traffic model. Counters to measure the network capacity are the BHCA, number of NodeBs/cells, CS Erlang, PS throughput, and number of active users. The following figure shows the dimensions that are used for calculating the configurations.

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where the control plane is dimensioned by BHCA, number of cells/NodeBs, number of active users, and number of online users. The user plane is dimensioned by CS Erl, PS throughput, number of cells, number of active users, and number of online users. Transmission is dimensioned by CS Erl, PS throughput, number of NodeBs, number of active users, and number of online users. In a UMTS dimensioning process, the network capacity requirements are calculated based on the number of users and the traffic model. The input items include the traffic model and total number of subscribers. The output items include traffic volume, PS throughput, BHCA, number of NodeBs/cells, active users, and online users. 

Input Items

Item

Units

Total subscribers CS parameters CS voice penetration ratio

%

CS data (Video Phone 64k) penetration ratio

%

CS voice call per sub

times

Voice traffic per subscriber in BH

Erlang

Proportion of soft Handover for CS Voice traffic (Not include Softer HO)

%

Handover times per CS voice call

times

CS data penetration ratio CS data call per sub per BH

times

CS data traffic per CS data (video phone 64k) subscriber in BH

Erlang

Proportion of soft Handover for CS data traffic (Not include Softer HO)

%

Handover times per CS data call

times

PS parameters PS (Including R99 and HSPA) Penetration Ratio (% of Total Subscribers)

%

PS call per sub per BH

times

PS throughput (Including R99 and HSPA, ULDL) per subscriber in BH (bps)

bps

Proportion of soft handover for PS traffic (Not include Softer HO)

%

MHT (mean hold time) in CELL_DCH and CELL_FACH per PS call

s

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Item

Units

Mean holding time (MHT) in PCH per PS call (sec)

s

Handover times per PS call

times

HSDPA share of DL PS throughput per subscriber

%

HSUPA share of UL PS throughput per subscriber

%

PS channel switch per PS call

times

Cell update per PS call

times

NAS NAS signaling per subscriber per BH

times

Connectivity NodeB/Cell



Number

Output Items

Item

Comment

Iub CS traffic

Erlang

Iub PS throughput

Mbps

Iub active users (CID/UDP)

Number

Iub PS UL throughput

Mbps

Iub PS DL throughput

Mbps

Active users

Number

BHCA requirement Iu-CS traffic

Erlang

Iu-CS active users

Number

Iu-PS throughput

Mbps

Iu-PS UL throughput

Mbps

Iu-PS DL throughput

Mbps

Iu-PS online users

Number

Iur CS Traffic

Erlang

Iur active users(CID/UDP)

Number

Iur PS UL Throughput

Mbps

Iur PS DL Throughput

Mbps

BHCA capacity of GPU (for Control Plane) based on given traffic model

Number

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Item

Comment

NodeB/Cell

Number



Calculation process



Iub CS Traffic = Iub CS Voice Traffic +Iub CS Data Traffic * 2 Iub CS Voice Traffic = Total Subscirbers * CS voice penetration ratio *CS Voice Traffic per sub per BH * (1+Proportion of SHO for CS Voice traffic) Iub CS Data Traffic = Total Subscirbers * CS data penetration ratio *CS Data Traffic per sub per BH * (1+Proportion of SHO for CS Data traffic)



Iub PS throughput = Iub PS UL Throughput +Iub PS DL Throughput Iub PS DL Throughput = Total Subscirbers * PS (Including R99 and HSPA) Penetration Ratio *Total PS throughput (HSPA and R99, UL+DL) per sub * Proportion of DL PS throughput * (R99 share of DL PS throughput per sub* (1+Proportion of SHO for PS call ) + HSDPA share of DL PS throughput per sub) Iub PS UL Throughput = Total Subscirbers* PS (Including R99 and HSPA) Penetration Ratio * Total PS throughput (HSPA and R99, UL+DL) per sub * Proportion of UL PS throughput * (1+Proportion of SHO for PS call)



Active users = Total Subscirbers * (CS voice penetration ratio * CS Voice Traffic per sub per BH + CS data penetration ratio * CS Data Traffic per sub per BH + PS (Including R99 and HSPA) Penetration Ratio * PS call per sub per BH * Mean holding time (MHT) in DCH/H/FACH state per PS call /3600)



Online Users = Total Subscirbers * CS voice penetration ratio * CS Voice Traffic per sub per BH * (1+Proportion of SHO for CS Voice traffic) + Total Subscirbers * PS (Including R99 and HSPA) Penetration Ratio * PS call times per subscribers in BH * (Mean holding time (MHT) in DCH/H/FACH state per PS call+ Mean holding time (MHT) in PCH per PS call) / 3600



Iub active users(CID/UDP) = Iub CS active users(CID/UDP) + Iub PS active users(CID/UDP) Iub CS active users(CID/UDP) = Total Subscirbers * CS voice penetration ratio * CS Voice Traffic per sub per BH * (1+Proportion of SHO for CS traffic) + Total Subscirbers * CS data penetration ratio * CS data Traffic per sub per BH * (1+Proportion of SHO for CS traffic) * 2 Iub PS active users(CID/UDP) = Total Subscirbers * PS (Including R99 and HSPA) Penetration Ratio * (PS call per sub per BH *Mean holding time (MHT) in DCH/H/FACH state per PS call /3600) * (1+Proportion of SHO for PS call) * 3



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Iub session set-up and release requirement in BH = Total Subscirbers * (CS voice penetration ratio * (CS voice call per sub * 2 +CS voice call per sub * Handover times per CS voice call *1) +CS data penetration ratio *(CS HUAWEI CONFIDENTIAL

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Data call per sub * 2 +CS Data call per sub * Handover times per CS Data call *1) +PS (Including R99 and HSPA) Penetration Ratio * (PS call per sub per BH * 3 +PS call per sub per BH * Handover times per PS call + PS call per sub per BH * PS channel switch per PS call*1 + PS call per sub per BH* Cell update per PS call*1) +NAS signaling per subscriber per BH*1 ) 

Iur CS Traffic = Traffic throughput ratio between Iur and Iub * Iub CS Traffic



Iur active users(CID/UDP) = Traffic throughput ratio between Iur and Iub * Iub active users(CID/UDP)



Iur PS DL Throughput = Traffic throughput ratio between Iur and Iub * Iub PS DL Throughput



Iur PS UL Throughput = Traffic throughput ratio between Iur and Iub * Iub PS UL Throughput



Traffic throughput ratio between Iur and Iub is the ratio of traffic throughput of Iur to that of Iub. IuCS Traffic = IuCS Voice Traffic +IuCS Data Traffic IuCS Voice Traffic = Total Subscirbers * CS voice penetration ratio * CS Voice Traffic per sub per BH IuCS Data Traffic = Total Subscirbers * CS data penetration ratio *CS Data Traffic per sub per BH



IuCS active users = IuCS Traffic



IuCS session set-up and release requirement in BH = Total Subscirbers * CS voice penetration ratio * CS call times per subscribers in BH * 2 Note: One CS call times corresponds to 2 times session setup/release.



IuPS throughput = IuPS UL Throughput +IuPS DL Throughput IuPS DL Throughput = Total Subscirbers * PS (Including R99 and HSPA) Penetration Ratio *Total PS throughput (HSPA and R99, UL+DL) per sub * Proportion of DL PS throughput IuPS UL Throughput = Total Subscirbers * PS (Including R99 and HSPA) Penetration Ratio * Total PS throughput (HSPA and R99, UL+DL) per sub * Proportion of UL PS throughput

 IuPS on-line users = Total Subscirbers * PS (Including R99 and HSPA) Penetration Ratio * PS call times per subscribers in BH * (Mean holding time (MHT) in DCH/H/FACH state per PS call+ Mean holding time (MHT) in PCH per PS call) / 3600  IuPS session set-up and release requirement in BH = Total Subscirbers * PS (Including R99 and HSPA) Penetration Ratio * PS call times per subscribers in BH * (1 + PS channel switch per PS call * 0.5 + Cell update per PS call * 0.5)  BHCA requirement = Total Subscirbers * (CS voice penetration ratio * CS voice call per sub+CS data penetration ratio * CS data call per sub per BH+PS (Including R99 and HSPA) Penetration Ratio * PS call per sub per BH) 1. Number of EGPUa boards required for the user plane HUAWEI TECH.CO.,LTD

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Item

Description

Calculation of the Board Quantity

Iub PS throughput

PS throughput over the Iub interface

a' = Total Iub PS throughput requirement/ Real PS throughput capacity supported by each EGPUa UP board

Iub CS traffic

CS traffic over the Iub interface

b' = Total Iub CS Erlang requirement / Traffic (Erl) supported by each EGPUa UP Only board

Active users

Number of active users supported by the Iub interface

n' = Total Active users requirement/ Number of active users supported by each EGPUa UP Only board

Cell quantity

Number of cells managed by the RNC

c' = Total Cell quantity requirement / Number of cells supported by each EGPUa UP Only board

N_EGPUa_UP = Max(a'+ b', c', n')

2. Number of EGPUa boards required for the control plane

Item

Description

Calculation of the Board Quantity

BHCA requirement

BHCA required by the network

b' = Total BHCA requirement / BHCA capacity supported by each EGPUa CP only board

Active users

Number of active users supported on the control plane

n' =Total Active users requirement / Number of active users supported by each EGPUa CP Only board

Online Users

Number of online users supported on the control plane

m' = Total Online users requirement / Number of online users supported by each EGPUa CP Only board

NodeB quantity

Number of NodeBs managed by the RNC

nb' = Total NodeB quantity requirement / Number of NodeBs supported by each EGPUa CP Only board

Cell quantity

Number of cells managed by the RNC

c' = Total Cell quantity requirement / Number of Cells supported by each EGPUa CP Only board

N_EGPUa_CP = max(b', n', m', nb', c')

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3. Number of required EXOUa boards

Iub

Item

Value

Iub transmission type

10GE Optical (IP)

Iub PS throughput

4680 Mbps

Calculation of Board Quantity

Real capacity for PS throughput of EXOUa in Iub interface(Gbps)= Min[Transmission packet length of Iub interface (Byte) * 8 * 8400000 * 80%/1000000000, 10], or, using the default recommended value: 8(Gbps). If using the default recommended value 8(Gbps) as the specification. ba' = Total Iub PS throughput requirement / Real capacity for PS throughput of EXOUa in Iub interface

Iu-CS

Iu-PS

Iub CS traffic

20800

bb' = Total Iub CS Erlang requirement /Traffic (Erl) supported by each EXOUa board

NodeB quantity

600

bn' = Total NodeB quantity requirement /Number of NodeBs supported by each EXOUa board

Iub active users(CID/UDP)

124800

an' = Total Iub CID/UDP requirement / Iub UDP number supported by each EXOUa board

Iu-CS transmission type

10GE Optical (IP)

Iu-CS traffic

16000

Iu-PS transmission type

10GE Optical (IP)

Iu-PS throughput

3600 Mbps

cb' = Total IuCS Erlang requirement/Traffic (Erl) supported by each EXOUa board

Real capacity for PS throughput of EXOUa in IuPS interface(Gbps)= Min(transmission packet length of IuPS interface (Byte) * 8 * 8400000 * 80%/1000000000, 10), or, useing the default recommended value: 10(Gbps). If using the default recommended value 10(Gbps) as the specification. pb' = Total Iub PS throughput requirement / Real capacity for PS throughput of EXOUa in Iub interface

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Iu-PS online users

23111

pu' = Total IuPS TEID requirement / IuPS TEID number supported by each EXOUa board

Iu-PS session set-up and release

1778

ps' = Times of session setups and releases on the IuPS interface / IuPS Setup&Reconfigure Sessions number supported by each EXOUa

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Item

Value

Calculation of Board Quantity board

Iub, Iu-CS, and Iu-PS interface boards are configured separately and are in N+1 backup mode, the number of required interface boards as follows: 1) N_IUB_IF = ROUNDUP[Max(ba'+bb', bn', bu')] +1 2) N_IUCSIUR_IF = ROUNDUP( [cb'+ 8%*( ba'+ bb')] + 1 3) N_IUPS_IF = ROUNDUP[Max(pb', pu', ps')] +1 N_EXOUa = N_IUB_IF + N_IUCSIUR_IF + N_IUPS_IF

4.2

GSM BSC6910 Dimensioning A BSC6910 GSM can be configured with one cabinet to achieve maximum capacity. A maximum of three subracks can be configured in each cabinet. The procedure of typical configuration can be carried out as follow steps.

1. Requirement Input Operator provides the network requirement which should include the information as listed in below figure.

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2.

Dimension

The following figure shows the dimensions that are used for calculating the configurations.

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5

Future Evolution

5.1

GU 900 / GL 1800 Refarming

5.1.1

GU 900 Refarming Solution 5 MHz

Huawei Leading Solution

3.8Mhz ~ 5Mhz UMTS Carrier Solution UMTS

GSM

GSM

4.2 MHz

△ 1.2Mhz bring more GSM capacity Advantage

GSM

UMTS

GSM

3.8 MHz

GSM

UMTS



Up to 1.2Mhz spectrum saved



Supported with standard 3G terminals



Negligible impacts to GSM network



No risk, it’s verified in commercial networks

GSM

Figure 6: Huawei GU900 Refarming Solution With the exceptional high-end MSR modules offered, the whole upgrade path from GSM900 to GSM/UMTS900 is reduced to only software upgrades of no more than one minute in the centre equipment room. As such, the requirement of any hardware changes is eliminated besides the avoidance

of

additional

site

visits.

In

addition,

Huawei

supports

Small

Bandwidth

(3.8MHz/4.2MHz/4.6MHz) UMTS 900MHz refarming solution which leads to the increment of spectrum efficiency. Huawei is a leader in UMTS 900MHz refarming solution and ranked number one in the market share of refarming contracts. With the abundant experience, Huawei has the capability of facilitating Indosat towards building a state-of-art UMTS 900 MHz network in the future.

. Figure 7: Huawei GU9000 Refarming Solution Application HUAWEI TECH.CO.,LTD

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5.1.2

GL 1800M Refarming Solution Refarming is an effective strategy to support Indosat transformation from a voice service provider to a leading multiservice and mobile broadband provider. Huawei anticipates that the valuable GSM1800 frequency resources could possibly be refarmed in the near future to enable LTE. To fully protect Indosat investment and ensure flexible network strategy in the future, Huawei have proposed all SDRcapable RF modules for the existing 2G network modernization. The proposed RRU3929 1800MHz modules support smooth evolution from GSM to LTE1800 by software upgrade.

Figure 8: Huawei GL1800 Refarming Solution rd

According to the GSA report, LTE1800 eco-system is built. By 3 of July, 2012, a total of 98 kinds of devices support LTE 1800 MHz in the market and a total of 38 LTE 1800 MHz network was launched. As such, it is mature to introduce LTE 1800MHz. Huawei has rich experience in deploying LTE1800 network. More than 10 LTE1800 network was launched by Huawei. Huawei has the ability in assisting Indosat towards developing LTE1800 network in the future.

Figure 9: Huawei GL1800 Refarming Solution Application HUAWEI TECH.CO.,LTD

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5.2

RNC in Pool

Figure 10: RNC Pool Architecture Huawei proposes RNC pool construction of newly-deployed BSC6910 with BSC6900 or without BSC6900. The “RNCs in pool” solution can provide Indosat with following benefits: RNC in Pool Load balancing: RNCs in RNC pool can share the control-plane load and user plane load. User-plane load sharing is performed together with control-plane load sharing. RNC hardware capacity may not meet signaling capacity requirements because of the sharp increase in smart phones. Without this feature, operators must split the RNC when the signaling capacity requirement is over RNC hardware capacity, which may require complex network reconstruction and affect ongoing services. With this feature, RNCs in an RNC pool can share the control-plane load and user plane load. The split of RNC may be avoided and the impact on the network KPIs may be minimized when the bursting signaling capacity requirement is over RNC hardware capacity. RNC in Pool Node redundancy: RNCs in an RNC pool can work as backups for each other, thereby improving the reliability of the network significantly. With this feature, services on a faulty RNC can be taken over by and resumed on the backup RNC. This increases network reliability. This feature prevents services from being interrupted when an RNC is faulty. RNCs may fail because of natural disasters, power outages, and software and hardware faults. Without this feature, all NodeBs under a faulty RNC will go out of service. This will cause possible huge losses for operators.

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5.3

Evolution From 2WRD to 4WRD RXU06, a new product developed as a joint innovation between Huawei and Indosat. RXU06 can be configured with the legacy 2WRD site to achieve all of 3 high bands with 4WRD: GL1800M,U2100M and LTE2600M

5.4

1.

No impact on the legacy equipments, all 2T2R RRUs will be kept and reused;

2.

Only 2 antenna ports are occupied for 3 high band 4WRD.

Network Evolution Based on Indosat requirements, this chapter will focus on how the proposed solution for different Indosat can support smooth evolution to the future configurations with less hardware change.

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 G900/D1800 - 444/444 (existing G900-444)

 G900/D1800/U2100 - 444/444/222 (existing G900/D1800 - 444/444)

 G900/U2100 - 444/222 (existing G900 - 444)

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 D1800/U2100 - 444/222 (existing D1800 - 444)

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 L1800 - 1/1/1 - 20 MHz (existing G900/U900/U2100 - 222/111/222)

 L1800 - 111-10 MHz (existing G900/U900/U2100 - 333/111/222)

 L2300 - 1/1/1 TDD (existing G900/U900/U2100 - 333/111/222)

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6

MBB User Migration

6.1

Main Modules for User Migration User migration mainly involves two logical modules, Fallback User Analysis and Potential MBB User Analysis.

Figure 11: User Migration Analysis module Fallback User Analysis: Users and traffic (mainly PS traffic) fall back from a higher generation network to a lower generation network. A higher generation network usually works in a high frequency band, such as UMTS 2100 MHz, LTE 1800 MHz, or LTE 2600 MHz, and coverage holes exist during the initial deployment of such a network. As a result, a user may fall back to a lower generation network even if the user subscribes to services of a high generation network. This affects user experience. Such a fallback may also occur in a higher generation network with light load or a lower generation network that requires capacity expansion. A specific network planning is provided based on detailed analysis of fallback.

Below are the three main fallback scenarios in a descending order in terms of analysis capability: 

Users and traffic fall back from 3G to 2G







The current analysis focuses on the proportions of fallback users and traffic, as well as when and where fallback occurs most. Different measures are adopted according to different causes.

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Figure 12: fallback scenarios As shown in the preceding figure, fallback is mainly caused by four reasons. The following describes the reasons one by one and provides the corresponding measures. 

A high generation network is heavily loaded: The fallback can be resolved by expanding the capacity after evaluating the capacity.



Parameters are incorrectly configured:



A high generation network has poor coverage: The fallback can be resolved by analyzing the area where coverage needs to be enhanced. This requires an analysis on weak coverage of the high generation network and a geographical analysis on the area where fallback occurs most.



Users are locked in a lower generation network: This may be caused by coverage problems, deteriorating user experience. Current analysis capability is only limited to coverage analysis.

Potential MBB User Analysis: This module aims at migrating users in a lower generation network to a higher generation network. The following three steps need to be performed to achieve this purpose: 

Discover target users for migration.



Formulate migration strategies.



Perform network planning.

Step 1 is essential to the entire migration. In this step, you need to categorize users in the entire network according to their behaviors (that is, MBB migration target user finding). In step 2, you need to formulate corresponding strategies for those categorized users. The following table lists detailed strategies for specific users.

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User Category

Strategy

Others 4G users

//

4G fallback user

Focus on the impact of 4G fallback users on 3G networks because 4G users usually have a great traffic volume.

Others 3G users

//

3G user with 4G terminal

Migrate users to 4G networks as soon as possible.

3G user with high traffic (> XXX Mbps per day)

Replace terminals, and orderly migrate users from 3G networks to 4G networks to relieve the 3G network load.

2G user with 3G terminal

Migrate users to 3G networks as soon as possible.

2G user with high traffic (> XX Mbps per day)

Replace terminals, and orderly migrate users from 3G networks to 2G networks to relieve the 2G network load.

2G user with high ARPU

Replace terminals, and orderly migrate users to the 3G networks.

Other 2G users

//

In step 3, evaluate whether a network can meet the capacity requirements of users that migrate to the high generation network. To be specific, evaluate the increase in the number of 3G users after migration, and then use the evaluation results to forecast requirements of network capacity. As shown in the following figure, user migration increases the number of 3G users by 14%. (In this case, the user forecast module of the original tool is used.)

Figure 13: User Migration Chart

In addition, evaluate refarming feasibility for a low generation network based on the migration situation. The following figure shows an example.

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Figure 14: Refarming scenario for user migration

6.2

MBB User Migration Implementation Process A complete MBB user migration project includes the following steps. 1)

Carry out customer engagement, clarifying cooperation intention and defining scope.

2)

Collect data based on scenarios.

3)

Analyze fallback users and propose optimization suggestions.

4)

Identify potential target users.

5)

Output suggestions on user migration.

The following figure shows the detailed process.

Figure 15: User Migration Implementation process

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SRAN Solution

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