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Method and system for establishing VoIP call

A technology of call request and call answer, applied in the field of communication, can solve a large number of problems, achieve the effect of speeding up and omitting redundancy

Active Publication Date: 2016-04-20
CHINA TELECOM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A significant defect brought about by this is that the gradual and repeated address exchange will bring a large amount of signaling interaction and generate a large amount of signaling traffic, which is a fatal flaw for mobile Internet applications

Method used

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  • Method and system for establishing VoIP call
  • Method and system for establishing VoIP call
  • Method and system for establishing VoIP call

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Embodiment Construction

[0071] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0072] The relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0073] At the same time, it should be understood that, for the convenience of d...

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Abstract

The invention discloses a method and system for establishing a VoIP call. The method comprises when a calling subscriber terminal issues a call to a called subscriber terminal, determining whether the calling subscriber terminal belongs to a symmetric NAT type; if not, executing a first call establishment flow; if so, sending a type inquiry request to a call server by the calling subscriber terminal so as to query the NAT type of the called subscriber terminal; after the calling subscriber terminal receives an inquiry response sent from the call server, determining whether the called subscriber terminal belongs to the symmetric NAT type; if not, executing the first call establishment flow; and if so, executing a second call establishment flow. For the method for establishing a VoIP call, the corresponding call flow is selected according to the NAT type of the calling subscriber terminal and the called subscriber terminal so that redundant steps can be omitted and the speed for call establishment can be greatly improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and system for establishing a VoIP call. Background technique [0002] VoIP is a very popular application on the Internet. Due to the widespread existence of NAT devices, ICE (InteractiveConnectionEstablishment, IETFRFC5245) technology is generally used. This technology requires the clients of both communication parties to perform the following processes respectively: [0003] 1. Collect the local address of the client and the mapped address on the public network; [0004] 2. Request the media transfer service from the transfer server and obtain the transfer address; [0005] 3. The above three candidate addresses interact through signaling, and the calling and called ends form a 3x3 candidate address pair for validity verification; [0006] 4. Select an address pair that can communicate with each other as the media channel, and establish a call. [0007] The above...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L29/12
Inventor 付斌杨鑫
Owner CHINA TELECOM CORP LTD
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