huawei high reliability gsm-r solution

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HUAWEI TECHNOLOGIES Co., Ltd.

www.huawei.com

HUAWEI Confidential

Huawei High Reliability GSM-R Solution

HUAWEI TECHNOLOGIES Co., Ltd. Page 2HUAWEI Confidential

Content

� Reliability Based Products Design

� Telecom Grade Network Reliability

� Advanced Access Restriction

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� 1+1 or N+1 for all boards, Dual-plane for inter-connection, dispatching station and O&M etc.

Frame 0#

Frame 1#

Frame 2#

Frame 9#

LAN Switch inplane 1

LAN Switch in plane 0

Standby iGWB

FE

GE Active iGWB

BAM

Frame 0#

Frame 1#

Frame 2#

Frame 9#

LAN Switch inplane 1

LAN Switch in plane 0

Standby iGWB

FE

GE Active iGWB

BAM

FE

Host Background

To the billing center

WS WS WS

HubTo the network

Management center

FE

To the billing center

Emergency WS

Dual-plane CN Architecture

Dispatching Station


SAU

HDU

O&M/SMU

LAN 1 LAN 2

Plane 1 Plane 2

1+1

Key Board

ActiveStandby

N + 1

Common Board

…

Active Standby

� Dual-network dual-plane technique, realizing real-time data backup and eliminating single-point failure

� Hot backup, 1+1 for key boards, N+1 for common boards

� Real-time fault detection and self-healing

Dual-network Plus Dual-planeDual-network plus Dual-plane SAU hardware redundancy

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� Automatic fault detection� Automatic fault detection

� TransCoder pool� DSP pool� TransCoder pool� DSP pool

� Modularized design enables fault isolation

� Modularized design enables fault isolation

Resource Pool

StablePlatform

1+1 or N+1 backup

Dual-plane Port TrunkHost frame Standby frameStandby frame

Process board

Host SCU

Process boardProcess board

Standby SCU

Host SCUHost SCU

Standby SCUStandby SCU

DSP DSP

DSP DSP

Reliability-secured All-IP BSC Platform


OMU OMU

……

Lanswitch(standby plane)

M2000M2000 Client

Lanswitch(Active Plane)

Active linkStandby link

Dual-Plane OM Networking

� Avoids single-point failure and provides high availability of OM network

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� Traffic control trigger� Signaling Overload Trigger

� Services Attempt Times Trigger

� CPU Utilize Rate Trigger

� Automatically monitor

� The trigger value can be configured via O&M system

� Suitable for all traffic model

� Combined with user's priority

CPU Utilization

Overload start threshold

Congestion startthreshold

Time

Overload end threshold

Congestion endthreshold

Multi-level Traffic Control

Traffic control basing on CPU utilization

The trigger threshold can be flexibly configured


Failure NEAlarm Box

Notice

Alarm Report

Alarm Inspection

SMS Notice

� Flexible alarm customization: alarm name, alarm class, receiver etc.

� Diverse alarm notification, network operation status in your hand

E-mailiManagerTM M2000

Automatic Alarm System

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Content





MSC Server2

MGW MGW

Backup

MGW� High Reliable Solution: � MSC Server with N+1 Dual-homing,

MGW in pool with mini-flex� Load sharing in A interface between

MGW

� Convenient O&M� Synchronizing the data

configuration automatically

Mini-Flex

MGW Pool

iManager M2000Centralized O&M

MSC Server1

Dual-homing + Mini-Flex

BSC BSCBSC BSC

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HLRHLR--11

RedundancyRedundancyHLRHLR

HLRHLR--NN

HLRHLR--11

RedundancyRedundancyHLRHLR

HLRHLR--NN

HLRHLR--11MasterMaster

BackupBackup

HLRHLR--22MasterMaster

BackupBackup

ActiveActive

HLRHLRStandbyStandby

HLRHLR

Huawei HLR Redundancy Solutions

N+1 compatibility redundancy solutionN+1 mated redundancy solution

1+1 mated redundancy solution 1+1 load-sharing redundancy solution


Tapes

Active-HDU Standby-HDU

DB

Local Hard Disk Local Hard Disk

Disk Array and Tapes

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2

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System Level Backup

� System Level Backup� Cluster Configuration Information� Oracle System� Operation System

� Data Level Backup� Dump data to local disk� Copy data to local hard disk of

Standby-HDU� Backup data to tapes

� Backup Frequency� System level backup is performed

once when delivered� Data level backup frequency is

configurable

DB

Data Backup in HLR

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Double Coverage

A1&B1 A2&B2

Master-A

Backup-B

� Double coverage secures high reliability of radio coverage� Simple network planning� Less civil works due to no additional site requirements

A1 A3

Co-site coverage technique Overlap coverage technique


Transceiver Redundancy

� Standby TRX will be activated once master TRX has failed� Activated standby TRX will use the same frequency point as master

TRX1

TRX2

TRXn

TRX1

TRX2

TRXm

Master - TRX Standby - TRX

� N – Integer

� M – Integer

� M < N

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BTS Ring Networking

Indoor Macro BTS

Mini BTSBSC/PCU

Outdoor Macro BTS

� Local communication is available if transmission link is broken� Industry’s fastest recovery algorithm guarantees quick transmission

reversal� All calls will be held during reversing


Fallback for Emergency

BTS

� Communication available during an Abis interface fault� VGCS and VBS for emergency communication� Shunting for dedicated shunting yard

BSC/PCU

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Content





Predefined Access Control Class

GSM-R SIMHigh-priority Access Class

� Class 0 - 9

� Class 11 - 15

Common Access Class

BSC/PCU

BTS

� Assigning cell with Access Control Class

� Broadcasting access control class to all subs in the cell

Broadcasting Class Info.

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IMSI Based Access Control

...

� Assigning designated network code in IMSI

� Subs with Non-designated network code in IMSI will be rejected by BSC

� The duration of link occupation will be significantly shortened in order to avoid radio traffic congestion

� IMSI: 460502300003252

� NC: 50Subs A

Subs B� IMSI: 460208299888816

� NC: 20Subs B will be directly

rejected by BSC

Subs A will be directly routed to MSC

� Suppose ‘50’ is the designated network code

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huawei high reliability gsm-r solution

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