Method for reducing the control signaling in handover situations

摘要

The present invention relates to a method, devices, and a program for using IP multicast addresses for mobile terminals (6) (UE) connected to a communication gateway (1) in a wireless communication network (2). The IP multicast address is used for updating routers (3) in the infrastructure network of where to transport data to the UE when the UE connects to another communication gateway (V), this may be updated from the new communication gateway or from a mobility management entity (5) relieving a network gateway (4) (e.g. a SAE gateway) of control traffic reducing the risk of bottle necks in the infrastructure network (2).

主权项

1. A method of mobility management in an Internet Protocol (IP) enabled wireless communication network, comprising the steps of:
using IP multicast for data transport of a unicast session for a user equipment (UE) going into active mode connected to a communication gateway that is located between the UE and an infrastructure network; allocating an IP multicasting address for use in transporting data to the UE, wherein the IP multicasting address is an IP multicast address and not an IP unicast address; informing the communication gateway of the allocated IP multicast address; sending a control message from the communication gateway, which is located between the UE and the infrastructure network, to a router in the infrastructure network to configure the router to forward to the communication gateway IP packets addressed to the allocated IP multicast address; using in a network gateway the IP multicast address for sending user plane data downlink to the UE; and using the router in the infrastructure network to transport the user plane data to the communication gateway.