Network update procedure and related network devices

摘要

The invention provides a method of controlling LA-based update procedure in a mobile radio communications network, and including the step of determining the reason for the LA-based update request, and varying connection procedures upon receipt of such request and responsive to the determination, and so can also provide a mobile radio communications network device arranged for operation in the network including plural terminal devices, the network device being arranged to forward to a target network device an indication of reasoning for a LA-based update procedure (during CSFB to the legacy system for example). Further the invention can also be embodied in a mobile radio communications network target device arranged for operation in the network including plural terminal devices and further arranged to monitor for an indication from a network device for reasoning for a LA-based update procedure, and further arranged to vary a connection procedure responsive to the said monitoring.

主权项

1. A method of controlling a Location Area-based update procedure in a mobile radio communications network, the method comprising:
determining the basis for the Location Area-based update request; varying connection procedures upon receipt of such request and responsive to the said determination; and varying the connection procedures from first procedures to second procedures having a burden lower than the first procedures in response to the basis indicating Circuit Switched Fall-Back, wherein the first procedures include a security procedure comprising at least one of authentication procedure, an identification procedure, and a TMSI (Temporary Mobile Subscriber Identity) re-allocation procedure, and wherein in the second procedures, the authentication procedure and the identification procedure are skipped, and a short version of the TMSI re-allocation procedure is adopted.