Method and system for realizing public telephone exchange network simulation service

Abstract

A method and system for realizing the PSTN simulating service, which are used in the packet-based SIP packet network and perform PSTN service of the simulating user line signaling interaction in the call session, includes: the access signaling adaptive entity performs the convert between the simulating user line signaling and the SIP signaling to the simulating user line signaling information in the interaction of the call session process, realizes the transmission of the said simulating user line signaling information between the access signaling adaptive entity and the SIP application server by using SIP protocol, and the SIP application server performs the related processing according to the analysis of the said simulating user line signaling information to realize the PSTN simulating service at the same time. The invention satisfies the protocol that the service realization is separated from the corn control in the IMS construction, and reduces the cost of network construction, management, performance and maintenance, and has deep influence to the social economic sense.

Description

technical field [0001] The present invention relates to public switched telephone network (PSTN, Public Switched Telephone Network) emulation service technology, in particular to a method and system for realizing emulation service of PSTN for simulated subscriber line signaling interaction in a session. Background technique [0002] The analog subscriber line signaling is the signaling between the analog telephone terminal and the switching equipment transmitted on the analog subscriber line. The analog subscriber line signaling mainly includes the following four types of signaling: 1) user status signaling describing the status of the user, The user status signaling reflects the off-hook status of the analog telephone terminal, and the switching device can detect whether the user is on-hook or not by detecting the presence or absence of current on the user line; 3) Ringing current and signal tone are the signaling that the switching equipment sends to the analog telephone t...

AI Technical Summary

Problems solved by technology

[0016] 1) Part of the PSTN service logic control needs to be implemented in the AGCF, which violates the design principle in TS 02030 V1.2.7 that the service of the IMS-based PES architecture is moved to the PES AS, and the AGCF does not do business

[0017] 2) A large number of services that require analog subscriber line signaling interaction during the call session must be implemented on the AGCF, resulting in more complicated control software on the AGCF

[0018] For example, the flashing analog subscriber line signaling in the process of terminating the session in the AGCF results in all services related to the flashing analog subscriber line signaling having to be implemented on the AGCF, while ETSI TS 3044 V0.1.0 only provides call waiting, Description of services such as three-way calls. There are many other services that rely on flashing to simulate subscriber line signaling, such as call forwarding, malicious call search, call back when busy, and registered calls when busy. Since the flashing simulation cannot be obtained on the PES AS Subscriber line signaling information, these services can only be realized on the AGCF

In this way, in the process of implementing a call session, the AGCF needs to perform a large number of services that simulate user line signaling interaction; for services involving multi-party sessions, the AGCF also needs to maintain multiple SIP session states; the AGCF also needs to control the MG to complete multiple session media Business media control and other requirements increase the complexity of the control software on the AGCF

[0019] 3) Complicated the management and maintenance of PES business

[0020] From the perspective of existing solutions, some PSTN services are implemented in the PES AS, and some PSTN services are implemented in the access signaling adaptation entity. This distributed service implementation mode makes it difficult to solve problems such as cooperation and conflicts between services. Moreover, service data configuration needs to be performed in the access signaling adaptation entity such as AGCF, which makes the management and maintenance of services more complicated

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