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); and modifying 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).