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    • 1. 发明授权
    • Hard handoff method between an asynchronous CDMA system and a synchronous CDMA system
    • 异步CDMA系统与同步CDMA系统之间的硬切换方法
    • US07151756B1
    • 2006-12-19
    • US09499933
    • 2000-02-08
    • Kyu Tae ParkKwang Ryul JungPyon Jung SongSun Bae Lim
    • Kyu Tae ParkKwang Ryul JungPyon Jung SongSun Bae Lim
    • H04Q7/00
    • H04W36/14H04B1/707H04B2201/70701H04W36/0072
    • A hard handoff method between asynchronous CDMA (code division multiple access) system and synchronous CDMA system is provided. A hard handoff method between asynchronous CDMA (code division multiple access) system and synchronous CDMA system in accordance with an embodiment of the present invention includes following steps. First step is to transmit asynchronous CDMA channels from synchronous CDMA base stations with a purpose of synchronizing handoff time at synchronous CDMA base station and code used at synchronous CDMA base station. The transmission is done by a mobile terminal that is in communication with an asynchronous CDMA base station. The transmission is a part of handoff process and the mobile terminal performs hard handoff to synchronous CDMA base station. Second step is to report measured result to the asynchronous CDMA base station on the basis of intensity of asynchronous CDMA pilot channel received from an adjacent synchronous CDMA base station. The reporting is done by the mobile terminal. Third step is to transmit handoff request message to the synchronous CDMA base station on the basis of the measured result. The transmission is done by the asynchronous CDMA base station. Fourth step is to transmit information necessary for handoff to the asynchronous CDMA base station. The transmission is done by the synchronous CDMA base station that receives the handoff request message. Fifth step is to perform hard handoff to the synchronous CDMA base station. The hard handoff is performed by the mobile terminal that receives the information through a traffic channel from the asynchronous CDMA base station.
    • 提供了异步CDMA(码分多址)系统和同步CDMA系统之间的硬切换方法。 根据本发明的实施例的异步CDMA(码分多址)系统和同步CDMA系统之间的硬切换方法包括以下步骤。 第一步是从同步CDMA基站发送异步CDMA信道,目的是同步CDMA基站的同步切换时间和同步CDMA基站使用的码同步。 传输由与异步CDMA基站通信的移动终端完成。 传输是切换过程的一部分,移动终端对同步CDMA基站执行硬切换。 第二步是根据从相邻同步CDMA基站接收的异步CDMA导频信道的强度,将测量结果报告给异步CDMA基站。 报告由移动终端完成。 第三步是根据测量结果向同步CDMA基站发送切换请求消息。 传输由异步CDMA基站完成。 第四步是将切换所需的信息传送到异步CDMA基站。 传输由接收​​切换请求消息的同步CDMA基站完成。 第五步是对同步CDMA基站执行硬切换。 硬切换由通过来自异步CDMA基站的业务信道接收信息的移动终端执行。