INTERWORKING BETWEEN NETWORKS OPERATING ACCORDING TO DIFFERENT RADIO ACCESS TECHNOLOGIES

摘要

There is provided a method of operating a terminal device in a first network that is operating according to a first radio access technology, RAT, the terminal device supporting and operating according to a network interworking feature that enables and controls interworking between the first network and a network operating according to a second RAT, the method comprising determining whether a first cell in the first network that is serving the terminal device supports the network interworking feature(1101); andmodifying the operation of the terminal device with respect to the network interworking feature if it is determined that the first cell does not support the network interworking feature(1103).