A call-back method and system in busy circumstances

A technology of busy and called terminals, applied in the field of communication, can solve the problems of increasing the load of the local exchange, affecting the processing efficiency of inter-office signaling and inter-office exchanges, and the inability of PSTN exchanges to process user wishes information, so as to make full use of network resources , reduce information interaction, and improve the effect of popularization ability

Active Publication Date: 2008-07-09
CHINA MOBILE COMM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This processing not only increases the load of the local switch, but also affects the processing efficiency of inter-office signaling and peer switches.
[0007] (3) The PSTN switch cannot process the user's wish information. When the called user's network status is idle, if the user does not want to accept the call at this time, the user cannot send his wish to the switch
[0011] (2) This solution requir

Method used

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  • A call-back method and system in busy circumstances
  • A call-back method and system in busy circumstances
  • A call-back method and system in busy circumstances

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0028] figure 1 It is a flowchart of Embodiment 1 of the method for calling back in case of busy according to the present invention, including the following steps:

[0029] Step A: After the application server (Application Server, AS for short) receives the call-back request when the calling terminal is busy and judges that the request is legal, the application server sends a subscription request for the status of the called terminal to the presence server (PresenceServer, PS for short) information.

[0030] Step B: The presence server learns that the called terminal is idle according to the reported called terminal state information and notifies the application server.

[0031] Step C: After learning that the called terminal is idle, the application server initiates a call invitation to the calling terminal and the called terminal.

[0032] Step A, step B, and step C reflect the call-back process in case of busy, and this embodiment further includes step D: establishing a c...

Embodiment 3

[0041] In the third embodiment, step A includes, as shown in Figure 4:

[0042] Step A1: After receiving the call-back request when the calling terminal is busy and judging that the calling application server is valid, the calling application server sends a subscription request message for the state of the called terminal to the called application server. First, the calling terminal calls the called terminal, and the called terminal determines whether the call queue of the called terminal waiting for CCBS reaches the maximum number (each terminal is at most 5). If the maximum number is not reached, the called application server returns to the calling terminal If the queue of the called terminal waiting for CCBS in the application server has not reached the maximum number, the calling application server allows the calling terminal to activate the CCBS service; after receiving the activation of the CCBS service by the calling terminal, the calling application server saves the rel...

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PUM

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Abstract

The invention relates to a method of calling back on busy, which comprises that after an application server receives request of calling back on busy of a calling terminal and judges that the request is legal, a subscription request message of the state of a called terminal is sent to a presence server; the presence server learns that the called terminal is disengaged according to the reported state information of the called terminal and notifies the application server; then the application server originates call invitation to the calling terminal and the called terminal to realize calling back on busy. The invention further relates to a system of calling back on busy, which comprises a core network of an IP multimedia subsystem scope; the core network is further provided with a presence server that notifies the application server after learning that the called terminal is disengaged; the application server respectively originates call invitation to the calling terminal and the called terminal. The invention proposes a CCBS implement proposal based on a PS that effectively manages the communication state of the users in whole network, so as to make full use of network resources and promote service ability.

Description

technical field [0001] The present invention relates to a method and a system for calling back in case of busy in the communication field. Background technique [0002] The Completion of Call to Busy Subscriber (CCBS) service can improve the connection rate of network sessions, bring new value-added services to operators, and also bring convenience to end consumers and provide better communication. experience. [0003] Public Telephone Networks (Public Switched Telephone Networks, PSTN for short) can provide CCBS services for local users, and complete the busy callback function between the calling and called users of the local office. The CCBS service process provided by PSTN is as follows: the calling terminal subscribes to the CCBS service authority, the calling terminal calls the called terminal, and when the called terminal is busy, the calling terminal listens to the busy tone, activates the CCBS service, and hangs up after the activation is successful. After the PSTN...

Claims

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Application Information

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IPC IPC(8): H04M3/48H04M3/50
Inventor 杜倩魏冰王晓云袁小海任宜军
Owner CHINA MOBILE COMM GRP CO LTD
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