(EN)
The present invention facilitates a handoff between cellular and wireless local area networks (WLANs). To facilitate a WLAN interface with the cellular network, a proxy packet control function (P-PCF) establishes a data tunnel to a packet data serving node (PDSN), as well as a WLAN association with a mobile terminal. The WLAN association is a tunnel, and is preferably implemented via an Access Router acting as a liaison between the proxy PCF and an Access Point. The Access Router and the proxy PCF establish an IP tunnel, which carries the WLAN user's PPP traffic. Handoffs between the cellular and WLAN networks are facilitated by effecting a same-PDSN, inter-PCF handoff wherein the communication session with the mobile terminal is effectively changed from between the PDSN and the proxy PCF to between the PDSN and a PCF associated with a base station controller facilitating the cellular access, and vice versa.
(ZH) 本发明便利于蜂窝网和无线局域网(WLAN)之间的切换。为了便利于WLAN与蜂窝网之间的连接，由代理分组控制功能(P-PCF)来建立通向分组数据服务节点(PDSN)的数据隧道，进而建立与移动终端的WLAN联系。所述WLAN联系是一条隧道，最好利用接入路由器作为代理PCF与接入点之间的联系设备来实现。接入路由器与代理PCF一起建立IP隧道，传送WLAN用户的PPP通话。蜂窝网与WLAN之间的切换通过同一PDSN(same-PDSN)、PCF间(inter-PCF)切换来实现。在切换过程中，与移动终端之间的通信会话被有效地从PDSN和代理PCF之间，转换到PDSN和与基站控制器相关联的PCF之间进行，所述基站控制器促进蜂窝网接入，反之亦然。
