【資料成文時間】：未知
【語言】：英文
【頁數(shù)】：17
【何人（公司）所著】：未知
【文件格式】：PDF
【文件原名】：PCU資料
【摘要或目錄】：
Abstract
The information in this document is intended to assist the designer in
designing a customer’s GPRS Core Network for GSM R10/GPRS R3.
(CN3.0)The document is part of a series of documents covering different
aspects of this task.
Internal document
The present document is classified as “Ericsson Wide Internal”. This means
that the documents only can be spread and used for internal purposes within
Ericsson.
Table of Contents
1General................................................................................................3
1.1Purpose ...............................................................................................3
1.2Scope ..................................................................................................3
1.3Completeness .....................................................................................3
1.4Sources ...............................................................................................3
1.5Revision history ...................................................................................3
2PCU Design dependencies .................................................................4
2.1Gb network design ..............................................................................4
2.1.1SGSN/PCU (Gb) Topology..................................................................4
2.1.2PCU placement ...................................................................................4
3Packet Control Unit, PCU (RPP), Description .....................................5
4PCU Dimensioning ..............................................................................7
4.1General................................................................................................7
4.2Dimension Number of RPPs and Gb Links .........................................8
4.2.1Inputs...................................................................................................8
4.2.2Optimized variables...........................................................................10
4.2.3Outputs..............................................................................................10
4.3How to dimension PCUs in low-traffic networks?..............................11
5Requirements on Transmission design (BSC/PCU interface
parameters) .......................................................................................12
5.1Requirements on Frame Relay design..............................................12
5.2Requirements on E1s........................................................................12
6Tools..................................................................................................14
6.1CMEX tool .........................................................................................14
6.2PCUTool............................................................................................14
6.3A custom-made PCU/RPP dimensioning tool made by ERT ............14
6.4HW dimensioning tool by PG Olsson/Bengt Lissard .........................15
6.5Other tools.........................................................................................15
7Definitions, abbreviations and references .........................................16
7.1Definitions..........................................................................................16
7.2Abbreviations.....................................................................................16
7.3References ........................................................................................16
Table of Figures
Figure 1. PCU implementation. Note: With GS890 subrate switching is
included. No need for a separate SRS................................................5
Figure 2 RPP Hardware Structure....................................................................6
Figure 3. Gb and Abis Interfaces.......................................................................7
Figure 4. RPP allocation to Gb and Abis. Note that 64kbps Abis channels are
not shown. .........................................................................................13