Method and system for processing a control message in an internet protocol-based mobile communication system supporting a multimedia service

• US 8,244,877 B2
• Filed: 03/21/2007
• Issued: 08/14/2012
• Est. Priority Date: 03/21/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Yeoum, Tae-Sun, Lim, Han-Na, Song, O-Sok, Jung, Joon-Ho
• Primary Examiner(s): Etienne, Ario
• Assistant Examiner(s): KIM, HEE SOO
• Application Number:
  US11/726,241
• Publication Number:
  US 20090125626A1
• Time in Patent Office: 1,973 Days
• Field of Search: 709/230, 709/227, 709/232
• US Class Current: 709/227
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/1008 based on parameters of servers, e.g. available memory or workload monitoring of computer activity G06F11/30
• CPC Class Codes: H04L 67/101 based on network conditions
• CPC Class Codes: H04L 67/1014 based on the content of a request
• CPC Class Codes: H04L 67/1029 using data related to the state of servers by a load balancer
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 67/2895 Intermediate processing functionally located close to the data provider application, e.g. reverse proxies
• CPC Class Codes: H04L 67/63 Routing a service request depending on the request content or context
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 4/12 Messaging; Mailboxes; Announcements

Abstract

A method and system for processing a message in an Internet protocol-based mobile communication system supporting a multimedia service. In the system, application servers include a representative application server and multiple backend application servers. A method for defining a control message between application servers to set up a session using the standard Internet protocol is provided. When an application server performs a call processing operation, control message processing load and control message transmission delay is reduced.

Claims

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.

2. The method of claim 1, wherein the representative application server is selected for processing the INVITE request mapped to a specific service requested by the UE from one or more representative application servers.

3. The method of claim 1, wherein the representative application server allocates the specific lower-layer application server from at least one lower-layer application server while considering a load state when the allocation information mapped to the UE is not received from the database server, and updates the allocation information of the lower-layer application server for the UE in the database server through the session initiation protocol.

4. The method of claim 3, wherein the representative application server stores service-by-service transparent data including the allocation information of the specific lower-layer application server in a home subscriber server, and sends transparent data to the specific lower-layer application server by excluding the allocation information of the specific lower-layer application server from the stored transparent data when a transparent data request from the specific lower-layer application server is detected.

5. An Internet protocol network system for use in an Internet protocol-based mobile communication system supporting a multimedia service, the system processing a request message from a User Equipment (UE), comprising:

the UE for sending an INVITE request to a Serving-Call Session Control Function (S- CSCF) to create a new dialog, and sending a subsequent INVITE request in the new dialog to the S-CSCF;

the S-CSCF for sending the INVITE request to a representative application server from one or more representative application servers, sending a first response to the UE when the first response is received from the representative application server, directly sending the subsequent INVITE request to a specific lower-layer application server according to a record-route of the INVITE request, and sending a second response to the UE when the second response is received from the specific lower-layer application server;

the representative application server for allocating a specific lower-layer application server from at least one lower-layer application server, 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, and sending the first response to the S-CSCF when the first response is received from the specific lower-layer application server; and

the specific lower-layer application server for processing the INVITE request and sending the first response to the representative application server, and processing the subsequent INVITE request and sending the second response to the S-CSCF,

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.

6. The system of claim 5, wherein the representative application server is selected for processing the INVITE request mapped to a specific service requested by the user equipment from one or more representative application servers.

7. The system of claim 5, wherein the representative application server allocates the specific lower-layer application server at least one lower-layer application server while considering a load state when the allocation information mapped to the UE is not received from the database server, and updates the allocation information of the lower-layer application server for the UE in the database server through the session initiation protocol.

8. The system of claim 7, wherein the representative application server stores service-by-service transparent data including the allocation information of the specific lower-layer application server in a home subscriber server, and sends transparent data to the specific lower-layer application server by excluding the allocation information of the specific lower-layer application server from the stored transparent data when a transparent data request from the specific lower-layer application server is detected.