| 摘要 |
<p>According to a first aspect of the present invention there is provided method of operating an application server responsible for real time services within an IP Multimedia Subsystem, the method comprising:
recording at the application server, explicitly and/or implicitly, the availability of packet switched and circuit switched access for associated user terminals;
receiving a terminating session establishment request in respect of one of said user terminals;
determining whether or not the received request relates to one of a class of real time services, and selecting one or both of a packet switched and circuit switched access for completing the session based upon the determined class and the access availability.</p> |
