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    • 4. 发明申请
    • Method and apparatus fo reducing latency during handoffs in a communications system
    • 在通信系统中减少切换期间的延迟的方法和装置
    • US20050281227A1
    • 2005-12-22
    • US10872121
    • 2004-06-18
    • Dietrich VedderChristopher Mooney
    • Dietrich VedderChristopher Mooney
    • H04L12/28H04L12/56H04W36/14
    • H04W36/0022
    • A methodology is provided to reduce data session handoff time between 3G1x and EV-DO technologies for dual mode access terminals. Generally, a dual mode access terminal is communicating with a data network through a base station and a particular packet data service node (PDSN) using EV-DO technology. When the EV-DO technology becomes at least temporarily unavailable, a handoff process is initiated so that communications with the data network may continue using 3G1x technology. During handoff, the access terminal provides an access network identification (ANID) that contains an International Mobile Subscriber Identifier (IMSI). A radio network controller within the base station extracts the IMSI and uses it to select the same PDSN used with the EV-DO technology, which eliminates the need to access an authentication, authorization, and Accounting (AAA) server and perform a re-authentication process.
    • 提供了一种方法来减少用于双模接入终端的3G1x和EV-DO技术之间的数据会话切换时间。 通常,双模接入终端通过使用EV-DO技术的基站和特定分组数据业务节点(PDSN)与数据网络进行通信。 当EV-DO技术至少暂时不可用时,启动切换过程,以便与数据网络的通信可以使用3G1x技术继续使用。 在切换期间,接入终端提供包含国际移动用户标识符(IMSI)的接入网络标识(ANID)。 基站内的无线网络控制器提取IMSI,并使用它选择与EV-DO技术相同的PDSN,无需访问认证,授权和计费(AAA)服务器,并执行重认证 处理。