ROUTING AREA UPDATE IN PACKET RADIO NETWORK

摘要

A method of transmitting data in a packet radio network to a mobile station (MS) performing a routing area update. The packet radio network transmits data (2-1, 2-3) to the mobile station (MS) via a first support node (SGSN1). The mobile station (MS) sends a routing area update message (2-1) to a second support node (SGSN2), which sends to the first support node (SGSN1) a request (2-3) for context data (2-5) of the mobile station from the first support node. The first support node (SGSN1) sends (2-3c, 3-3c) from its memory, data addressed to the mobile station to the second support node. It then waits for a predetermined period of time (3-3b) before sending the data to the second support node (SGSN2). The predetermined time (3-3b) may be fixed, depending preferably on the quality of service of the connection used by the mobile station. Alternatively the predetermined period of time expires when the second support note (SGSN2) sends to the first support node (SGSN1) a separate acknowledgement message indicating that the second support node has received the context data of the mobile station.