Signaling gateway for multihop-relaying a signaling message

• US 20060203831A1
• Filed: 12/27/2005
• Published: 09/14/2006
• Est. Priority Date: 03/14/2005
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Yoshizawa, Masahiro, Yumoto, Kazuma, Kawai, Eri
• Granted Patent: US 7,764,668 B2
• Time in Patent Office: Days
• US Class Current: 370/401
• CPC Class Codes: H04L 65/104 in the network
• CPC Class Codes: H04L 65/1043 Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04Q 2213/13106 Microprocessor, CPU
• CPC Class Codes: H04Q 2213/13164 Traffic (registration, measurement,...)
• CPC Class Codes: H04Q 2213/13166 Fault prevention
• CPC Class Codes: H04Q 2213/13176 Common channel signaling, CCS7
• CPC Class Codes: H04Q 2213/13196 Connection circuit/link/trunk/junction, bridge, router, gateway
• CPC Class Codes: H04Q 2213/13204 Protocols
• CPC Class Codes: H04Q 2213/13348 Channel/line reservation
• CPC Class Codes: H04Q 2213/13389 LAN, internet

Abstract

If interaction between signaling gateways frequently occurs, it is possible that extended processings are executed redundantly on a path of signaling messages. To avoid such a redundancy, a consistent method is necessary for deciding a signaling gateway to execute an extended processing from among the signaling gateways. The signaling gateways, each time they receive a signaling message, calculate information about a path through which it is transferred. By passing the path information in addition to the signaling message to an extended processing program, the signaling gateways decide whether to execute the extended processing on the signaling gateways, on a session basis. A signaling gateway that has executed an extended processing adds information indicating a processing status to the signaling message to notify other signaling gateways of it.

Claims

1. A signaling gateway connected to communication terminals and other signaling gateways, comprising:

a transmitting/receiving part that receives a signaling message from the communication terminals or the signaling gateways; and

a control part that, based on information about the position of the signaling gateway on a path through which the signaling message passes, and information about processings required by a session to which the signaling message belongs, decides whether to execute the processings in the signaling gateway.

2. The signaling gateway according to claim 1,

wherein the transmitting/receiving part transmits the signaling message added with information indicating whether processings required by the session to which the signaling message belongs have been executed in the signaling gateway.

3. The signaling gateway according to claim 1,

wherein the processings required by the session to which the signaling message belongs are two or more independent processings.

4. The signaling gateway according to claim 1, comprising a storage part,

wherein the storage part stores:

a program that acquires information about the position of the signaling gateway on the path through which the signaling message passes;

a program that acquires information about processings required by the session to which the signaling message belongs; and

a program that, based on information about the position of the signaling gateway on a path through which the signaling message passes, and information about processings required by a session to which the signaling message belongs, decides whether to execute the processings in the signaling gateway,

wherein the control part executes the programs stored in the storage part.

5. The signaling gateway according to claim 4,

wherein the program that decides whether to execute the processings in the signaling gateway can be added or deleted for each of the processings.