Patent ID: 8244877
Filing Date: 2012-08-14
Classification: H04L,H04W

Abstract:
1. A method for processing a request message from a User Equipment (UE) in an Internet protocol-based mobile communication system supporting a multimedia service, comprising: sending, by the UE, an INVITE request to a Serving-Call Session Control Function (S-CSCF) to create a new dialog, sending, by the S-CSCF, the INVITE request to a representative application server from one or more representative application servers; allocating, by the representative application server, a specific lower-layer application server from at least one lower-layer application server, and sending the INVITE request to the specific lower-layer application server by recording only an address of the specific lower-layer application server and an address of the S-CSCF in a record-route of the INVITE request; processing, by the specific lower-layer application server, the INVITE request and sending a first response to the representative application server; sending, by the representative application server, the first response to the S-CSCF; sending, by the S-CSCF, the first response to the UE; sending, by the UE, a subsequent INVITE request in the new dialog to the S-CSCF; directly sending, by the S-CSCF, the subsequent INVITE request to the specific lower-layer application server according to the record-route of the INVITE request; processing, by the specific lower-layer application server, the subsequent INVITE request and sending a second response to the S-CSCF; and sending, by the S-CSCF, the second response to UE, wherein the representative application server selects the specific lower-layer application server according to user allocation information, and wherein the INVITE request is forwarded to the representative application server according to initial filter criteria at the S-CSCF.