Patent ID: 9148778
Filing Date: 2015-09-29
Classification: H04L,H04W,Y02D

Abstract:
1. A method of supporting instant messaging for a mobile terminal, comprising: receiving, by a mobile application gateway for a packet domain core network which services a plurality of mobile terminals, a request for activating a first mobile terminal of the plurality of mobile terminals to receive a first communication from an instant message server, wherein the first mobile terminal has no IP connection and no static IP address associated with the first mobile terminal, wherein the request is received from the instant message server via an external packet switched network and includes an unique identification number of the first mobile terminal, and wherein the first mobile terminal is running an instant message client requiring continuous availability to receive communications from said instant message server via said external packet switched network; querying, by the mobile application gateway, a Home Location Register (HLR) for address of a Servicing GPRS Supporting Node (SGSN) where the first mobile terminal is located by utilizing the unique identification number of the first mobile terminal; returning, by the HLR, the queried address of SGSN to the mobile application gateway; sending, by the mobile application gateway, the request for activating the first mobile terminal to the SGSN; issuing, by the SGSN, a request to the first mobile terminal, requiring the first mobile terminal to issue a request for activating a Packet Data Protocol (PDP) context to the SGSN; activating the PDP context for the first mobile terminal in response to receiving, by the SGSN, the request for activating the PDP context issued by the first mobile terminal; and forwarding said first communication from the instant message server to the first mobile terminal using the activated PDP context.