Patent ID: 8224315

Claim:
In a telecommunications network including a radio access network having a plurality of base stations for wirelessly transmitting data between a mobile telecommunications device and the base stations, wherein some of the base stations are connected by cellular telecommunications transport to the telecommunications network and some of the base stations are connected by IP transport to the telecommunications network, a method of de-registering a given mobile telecommunications device from a given IP transport connected base station comprising: monitoring, at the given IP transport connected base station, quality of an IP transport connection of the given IP transport-connected base station to the telecommunications network; causing, at the given IP transport-connected base station, the given mobile telecommunications device to de-register from the given IP transport connected base station, when the quality of the IP transport connection is poor, by varying quality of the signals transmitted to the given mobile telecommunications device in order to simulate a reduction in quality of a received signal at the mobile telecommunications device.