Abstract text

A method for informing that the network supports the mobile Internet Protocol (IP) enhancement capability includes the network sending a message indicating the mobile IP enhancement capability of the network to a mobile station (MS). If the MS supports the mobile IP enhancement capability, the MS requests the enhanced mobile IP service according to the mobile IP enhancement specifications. If the MS does not support the mobile IP enhancement capability, the MS requests the mobile IP service according to the specifications which do not support mobile IP enhancement. The packet data access gateway may be a packet data serving node (PDSN) or a controlling access point (CAP) in a Code Division Multiple Access (CDMA) evolving network. Therefore, the method provided by the present disclosure enables the MS to learn the mobile IP enhancement capability of the network without having to resending requests, thus avoiding the waste of air interface resources.