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A number receiving method in session initialization protocol

A technology for initializing protocols and numbers, applied in the communication field, can solve the problem of redundant messages in the transaction layer of the SIP server, etc., and achieve the effect of strong versatility and scalability

Active Publication Date: 2008-03-26
ZTE CORP
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AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a number collection method in the SIP protocol, which solves the problem of too many redundant messages in the transaction layer of the SIP server in the existing number collection method

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Embodiment Construction

[0023] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] The focus of the present invention is to consider the signaling number collection flow and its exception handling based on the offer-answer model. When the dialog (dialogue) or early dialog (early dialog) is established, a complete user number may be required. At this time, the SIP server (SIP server) first proposes a number collection request (info-offer), and the terminal provides a number collection response ( info-answer). The number collection may be completed in one negotiation, or may be completed through multiple negotiations. If all the numbers cannot be collected in one negotiation, the SIP server will initiate a number collection request again, and continue through the offer-answer negotiation mechanism until the complete number is received. If the terminal finds that the number is wrong and needs...

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Abstract

The invention provides a number collecting method in the session initiation protocol, when a session initiation protocol server needs subscriber numbers, a number collecting flow is started, comprises following steps: (a) the session initiation protocol server sends a number collecting message to a terminal; (b) when receiving the number collecting message, the terminal sends a number collecting response message which carries number information to the session initiation protocol server; (c) the session initiation protocol server receives the number collecting response message and records the number information in a data base. The invention offers a new negotiation mechanism for controlling the number collecting flow based on a offer-answer model, applies some fields of the negotiation content to indicate negotiation results, the utilization of the mechanism realizes bilateral control of a terminal side and a network side, considers will and capability of participants relate to the session fully, has better universality and extensibility.

Description

technical field [0001] The invention relates to the field of communication, in particular to a method for collecting numbers based on an offer-answer (request-response) model in a session initiation protocol (SIP, SessionInitiation Protocol). Background technique [0002] SIP protocol is more and more favored by the industry due to its simplicity, easy expansion, and easy implementation, and has gradually become the mainstream in NGN (next generation network, next-generation network) and IMS (IP multimedia subsystem, IP multimedia subsystem) protocol. With the emergence of more and more client software supporting SIP, SIP-based servers and softswitches, the SIP protocol is increasingly favored by telecom manufacturers, operators and standard organizations. [0003] Chinese patent document CN200510011879 "A Mapping Method of Protocol Interworking Entities to Overlapped Transceiver Code Signaling" proposes to use INFO messages to realize overlapping code reception, which ensu...

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Application Information

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IPC IPC(8): H04L29/06H04L1/16H04M7/00H04M3/42
Inventor 贺晋宁凌文杰范珂左梅周桦
Owner ZTE CORP
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