Single call service establishing method

Abstract

The invention discloses a single call service establishing method. The method comprises the steps that a calling terminal initiates a single call establishing request which comprises the content of feasible media negotiation to a called terminal through a cluster server; the called terminal is combined with the content of feasible media negotiation to carry out a local media negotiation decision, and sends a ringing prompt which comprises a media decision result to the calling terminal through the cluster server; the calling terminal and the called terminal carry out resource distribution for the single call service at the same time; after a called user answers the single call, the called terminal sends call response to the calling terminal through the cluster server; and the calling terminal sends call confirmation to the called terminal through the cluster server. Through the application of the embodiment of the invention, the call establishing time can be effectively shortened, and the influence caused by the serialization of a calling terminal resource process and call control signaling is effectively reduced.

Description

technical field [0001] The present application relates to the technical field of communications, and more specifically, to a method for establishing a single call service. Background technique [0002] The trunking communication system is a dedicated wireless communication system developed to meet the needs of industry command and dispatch, and is oriented to various industry applications. Trunking communication systems are widely used in public security, transportation, public utilities, petrochemical industry, industry and commerce, and the military. Compared with the analog trunking communication system, the digital trunking communication system has many advantages such as high spectrum utilization rate, strong signal resistance to channel fading, high security and reliability, rich services, flexible and effective network management control, etc., and is currently the most widely used internationally and domestically. Trunked communication systems such as Terrestrial Tr...

AI Technical Summary

Problems solved by technology

[0029] The main problems of the single call method based on the media preprocessing method include: figure 1 The media negotiation preprocessing process from step 101 to step 104 shown, and the resource preparation notification process from step 105 to step 106 lead to complex signaling interactions between terminals and between terminals and systems

In addition, the calling and called terminals must wait for the response of the other party in the process of media negotiation preprocessing and resource preparation notification before proceeding to the next step. The control plane has a large delay, which ultimately increases the call establishment time

[0030] The main problems of the single call method based on the non-media preprocessing method include: the media negotiation is integrated into the call establishment signaling due to the omission of the independent media negotiation preprocessing process

However, the calling terminal resource preparation process in step 206 must wait until the called user answers the call and replies to the call response in step 204. Serialize the terminal resource preparation process, resulting in increased call setup delay

At the same time, the above-mentioned serialization process will lead to the situation that the calling and called terminals still cannot achieve normal communication after the called user has answered the call, because the resource preparation of the calling terminal is still in the process of preparation.

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