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Method for overlapped transmitting number by session initial protocol

An initial protocol and entity technology, applied in telephone communication, digital transmission system, electrical components, etc.

Active Publication Date: 2011-06-08
HUAWEI TECH CO LTD
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  • Summary
  • 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

Experimental program
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Embodiment Construction

[0036] 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...).

[0037] Figure 4 It 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.

[0038] exist Figure 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.

[0039] 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 numb...

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Abstract

The invention provides a call establishing method and system for calling a called network by a Session Initiation Protocol (SIP), and an SIP entity and a softswitch. The call establishing method comprises the following steps that the SIP entity sends at least a part of called number digits to a softswitch through an INVITE message; the SIP entity receives a call progress response message indicating that the called number is incomplete which is sent to the SIP entity by the softswitch when the called number is determined to incomplete based on the INVITE message; according to the call progress response message, the SIP entity sends the subsequently received digits of the called number to the softswitch. The solution provided by the present invention speeds up the connection, improves the call success ratio, consumes fewer resources, and prevents multiple INVITE messages from causing divergent routes.

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 Patents(China)
IPC IPC(8): H04L12/56H04M7/00H04L29/06
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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