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Method for overlapped transmitting number by session initial protocol

A technology of SIP protocol and entity, which is applied in the field of SIP entity, can solve problems such as slow connection time, increased network burden, and unable to find the called party, so as to speed up the connection time and improve the call success rate

Active Publication Date: 2007-06-20
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The first Enbloc solution starts the timer to wait for the follow-up number, which will slow down the connection time, and it is possible that the timer will expire and the full number will not be received. Release the call when the called party cannot be found
The second multiple INVITE scheme increases the network load, and multiple INVITEs may also cause forks in the Proxy selection route

Method used

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  • Method for overlapped transmitting number by session initial protocol
  • Method for overlapped transmitting number by session initial protocol
  • Method for overlapped transmitting number by session initial protocol

Examples

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Embodiment Construction

[0035]The following uses the overlapping code sending interaction process between SIP and ISUP to illustrate the tandem call between SIP trunks that support overlapping code sending. Assume that the called number dialed by the PSTN1 calling user is 075528781234, and this number will be sent separately in several messages (IAM / SAM...).

[0036] Fig. 4 is a schematic diagram of a process of using INFO messages to perform SIP overlapping code sending according to an embodiment of the present invention.

[0037] In Fig. 4, the PSTN1 side initiates a call with an IAM message, and invites the called user (such as 075528781234) on the PSTN2 side to join the session. The IAM message carries part of the called number, such as 07552878.

[0038] Softswitch-A serves as the calling office for SIP trunk overlapping code sending. After receiving the IAM message from the PSTN1 side, Softswitch-A analyzes and selects a route through the SIP trunk according to the called number, and initiate...

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Abstract

The call establishing method comprises: SIP entity sends at least a part of called number to the software switch by using INVITE message in order to send it to the called network; when confirming the called number is not a full number according to the INVITE message, the software switch sends the call progress answering for indicating the establishment of initial session to the SIP entity; according to the call progress answering, the SIP entity sends the received next called number to the called software by using INFO message, and then sends to the called network.

Description

technical field [0001] The present invention relates to a system and a method for transferring a call between networks using different communication protocols, and more particularly relates to a call establishment method, system and method for a Session Initiation Protocol (SIP) entity to use SIP protocol signaling to call a called network through a soft switch The SIP entity that adopts this method. Background technique [0002] With the continuous development of computer and communication technology, it has been recognized by more and more operators and equipment manufacturers to carry voice, data and images in a public packet network. Under such business-driven and network convergence trends, the NGN next-generation network model was born. NGN implements a distributed network structure in the packet network to effectively bear voice, data and multimedia services. [0003] As the core technology of NGN network, the development of softswitch has received more and more att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M7/00H04L12/56H04L29/06
CPCH04L61/605H04L65/1069H04L61/35H04L29/06523H04L29/12896H04L29/06197H04L65/80H04L65/1006H04L29/06326H04L29/06027H04L29/12783H04L2101/65H04L65/1104
Inventor 马红伟
Owner HUAWEI TECH CO LTD
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