TCAP-protocol-based method for calling forwarding of application layer

Abstract

The invention provides a transaction-capability-application-part(TCAP)-protocol-based method for calling forwarding of an application layer. The method comprises: S1, a TCAP layer of an intermediate node receives a first TR_BEGIN message from a network, converts the first TR_BEGIN message into a TC_BEGIN primitive, and sends the primitive to an application layer; S2, the application layer analyzes the application layer data to obtain calling information and determines whether the calling information belongs to a processing range of the intermediate node by using pre-configured data; if not, a destination address of the calling information is changed; S3, the application layer forwards calling to the TCAP layer by using a TC_RELAY primitive extended by the TCAP layer; S4, the TCAP layer looks up local transaction according to a Dialogue ID parameter in the TC_RELAY primitive, converts the TC_RELAY primitive into a TR_RELAY primitive after finding of the local transaction, and sends the TR_RELAY primitive to a TCAP transaction sub layer; and S5, the TCAP transaction sub layer converts the TR_RELAY primitive into a second TR_BEGIN message and sends the message to the network. According to the invention, call forwarding can be realized simply, efficiently, and reliably; the calling forwarding processing flow is simplified; and the calling forwarding processing efficiency is improved.

Description

technical field [0001] The invention relates to the field of business capability application part of the mobile communication system, and more specifically relates to a method for forwarding calls of the application layer based on the TCAP protocol. Background technique [0002] In some application scenarios, the service node may need to obtain a type of call information, but some of these calls do not belong to the processing scope of the service node. In order not to affect the normal call process, the service node needs to forward the call out, and do not wish to process subsequent messages for this call. [0003] In the SS7 (Signaling System No.7, No. 7 signaling) system, the application layer protocol based on TCAP (TransactionCapability Application Part, transaction capability application part) lacks the relevant process definition of call rerouting. If the service node receives a call that cannot be handled, the service node will generally choose to end the call, or ...

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned traditional call forwarding method is not only cumbersome and wastes resources, but also reduces system reliability. The specific defects are as follows:

[0006] (1) The forwarding node needs to associate the incoming call with the outgoing call, which increases the logical complexity of call processing;

[0007] (2) The forwarding node needs to bidirectionally forward all messages between the source node and the destination node, which increases the extra load of the proxy node;

[0008] (3) Call forwarding by forwarding nodes increases additional system overhead and reduces system reliability

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