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EVDO呼叫流程简介

臧京 CDMA/EVDO事业部 阿尔卡特-朗讯(中国)有限公司 2007.10

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提纲

1. 呼叫流程

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呼叫流程

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有关呼叫的流程的内容
SESSION ESTABLISHMENT
UATI(RATI) SESSION Negotiation PPP Connection

Call Setup
Normal Setup-AT Initiated Fast Connection AN Initiated

Handoff
Active Set Management Virtual Soft Handoff 1xEV-DO and 3G-1X Systems
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SESSION ESTABLISHMENT过程

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UATI(RATI)
UATI: Unicast Access Terminal Identifier RATI: Random Access Terminal Identifier UATI共128bit,UATI[127:24] 包含PDSN和基站扇区的信 息,从控制信道的SectorParameterMessage获得; UATI[23:0] 从UATIAssignment message获得

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分配/更新UATI过程
当AT第一次发送 UATIRequest时AT 没有UATI,在消息 中使用RATI代替 空闲状态中,AT的 移动到另一个子网 时,AT会发送 RouteUpdate message
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分配UATI过程实例
FFA 释放UATI后获得新的UATI的例子:

信令的具体内容:

UATI_ASSIGN.doc

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SESSION Negotiation
IS-856 Session Layer Session Management Protocol: provides means to control the activation and the deactivation of the Address Management Protocol and the Session Configuration Protocol. It also provides a session keep alive mechanism. Address Management Protocol: Provides access terminal identifier (ATI) management. Session Configuration Protocol: Provides negotiation protocols used in the session.
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SESSION Negotiation Procedure

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SESSION Negotiation 实例
FFA 释放UATI后新Session Negotiation的例子: Connection Establishment

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SESSION Negotiation 实例(cont.)
FFA 释放UATI后新Session Negotiation的例子(cont.): Configuration Request/Responset

信令的具体内容:
Configuration Request/Responset

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SESSION Negotiation 实例(cont.)
FFA 释放UATI后新Session Negotiation的例子: Connection Close

信令的具体内容: 参见后面的Normal Setup

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PPP Connection

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PPP Connection实例
FFA PPP建立时长的计算的两种方法比较:

EVDO_PPP建立时

长的计算的两种方法

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Call Setup-Normal Setup

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Call Setup-Normal Setup

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Call Setup-Normal Setup实例
FFA Normal Setup实例:AT INITIATED

信令的具体内容:

Normal Setup

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Call Setup-Fast Connection Setup

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Call Setup-AN INITIATED

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Call Setup-AN INITIATED实例
FFA Call Setup-AN INITIATED实例:

信令的具体内容:
CallSetupAnInitiate d

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Handoff- Active Set Management

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Handoff- Active Set Management实例
FFA Active Set Management实例:

Handoff_ActiveSet

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Handoff- Virtual Soft Handoff

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Handoff- Virtual Softer Handoff实例
FFA Virtual Softer Handoff实例:

同一基站不同扇区 间的前向虚拟软切

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Handoff- Virtual Soft Handoff实例
FFA Virtual Soft Handoff实例:

不同基站之间的前 向虚拟软切换

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Handoff- 1xEV-DO and 3G-1X Systems
双模AT可以Idle mode 和 Traffic mode在1xEV-DO and 3G-1X Systems间切换

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Handoff- 1xEV-DO and 3G-1X Systems 实例
FFA在睡眠状态下HRPD 到cdma2000 的切换
拨号建立连接,得到IP地址,等待AT进入Dormant状态后,从 EVDO区域向CDMA2000区域切换. (使用FFA做切换时, FFA会有声 音表示已经切换. 并且FFA的屏幕左上方, 有"x"变为"c") 切换后, 在CDMA2000覆盖区内做Ping测试, 同时得到IP地址, 验证 前后IP地址是否一致 验证AT接入CDMA2000的网络后,发送Origination消息在新系统中 注册.并能成功与CDMA2000网络建立连接

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谢谢
www.alcatel-lucent.com

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