A method of managing presence information in a packet-switched wireless communication network such as a General Packet Radio Service (GPRS) network or a Wideband Code Division Multiple Access (WCDMA) network. Instead of using the Session Initiation Protocol (SIP) to send presence update messages to a presence server in the packet-switched network, the MS/UE sends its presence information to the presence server using a circuit-switched Unstructured Supplementary Services Data (USSD) message that is sent via a USSD gateway. The USSD message includes an IP address of the presence server, and the USSD gateway extracts the IP address and forwards the presence update message to the presence server.
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机译：一种在诸如通用分组无线服务（GPRS）网络或宽带码分多址（WCDMA）网络之类的分组交换无线通信网络中管理在线信息的方法。 MS / UE不会使用会话初始协议（SIP）将状态更新消息发送到数据包交换网络中的状态服务器，而是使用电路交换的非结构化补充服务数据（USSD）将其状态信息发送到状态服务器。通过USSD网关发送的消息。 USSD消息包括状态服务器的IP地址，USSD网关提取IP地址并将状态更新消息转发到状态服务器。
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