WO2008028315A1

WO2008028315A1 - A fast accessing method in group communication

Info

Publication number: WO2008028315A1
Application number: PCT/CN2006/002163
Authority: WO
Inventors: Zhigang Wen
Original assignee: Zte Corporation
Priority date: 2006-08-24
Filing date: 2006-08-24
Publication date: 2008-03-13
Also published as: CN101502139B; CN101502139A

Abstract

The present invention comprises a fast accessing method in group communication. The user initials a group call through the terminal. During the call setup procedure, the BS system establishes resource for the user and assigns a service channel for the user; after the calling terminal received the message of assigning service channel, the calling terminal authorizes itself and indicates the user to speak; the calling terminal buffer stores voice message, the BS system establishes service channel for the calling terminal at the same time, and transfers authorization speak message to the calling user if the user is the first calling user in thegroup; after the calling terminal received the authorization speak message, the calling terminal transmits the buffer stored voice message to the BS system, the group call is starting. Furthermore, whether the user is the first calling user can be indicated in the service channel assign message, the calling user determines itself is the first calling user, then authorizes itself and indicates the user to speak. The method of the present invention can improve the speed of call establishment.

Description

Method for fast access in cluster communication

Technical field

The present invention relates to a trunking communication system, and more particularly to a call access method for a trunking communication system. Background technique

The trunking communication system based on mobile communication combines cellular communication technology with a dedicated dispatch communication system, and adopts a half-duplex communication communication system, which can realize fast connection and support group call (ie, one-to-many call mode). . Such a trunking communication system can be widely applied to enterprises, public security, police, and military departments that have high requirements for command and scheduling functions.

Figure 1 is a schematic diagram of the network structure of the trunking communication system. The cluster terminal is connected to the base station system through an air interface. The base station system communicates with the cluster scheduling server through the corresponding cluster scheduling client, and the cluster user register records the related information of the cluster user.

Group call is an important service feature in a cluster system. By sharing a pre-reverse traffic channel under a sector, a large-capacity group can be provided to a small range (a group can contain hundreds or thousands of user terminals, and These user terminals are all supported by group calls under a small range of sectors. Allowing a single user to talk to all users in the group at the same time, the users in the group, in addition to being talking, others must be listening.

The most important feature of trunking communication is that the connection connection time is short and the call can be established quickly. The traditional CDMA-based communication system can implement the group call function of the cluster, such as POT (PTT Over the Cellular) technology, but cannot meet the cluster system. Required fast access requirements.

The existing cluster call setup process is shown in Figure 2. It can be seen that the calling cluster terminal starts to send voice packets to the system after the cluster call is established and the cluster authorization message is received. In the call setup process, the calling user must wait. In order to achieve the rapid response of cluster communication, it is necessary to modify the normal call setup process and mode, reduce the call processing, and shorten the call setup time.

Summary of the invention The technical problem to be solved by the present invention is to provide a method for fast access in trunk communication, which can speed up the call setup.

In order to solve the above technical problem, the present invention provides a method for fast access in trunking communication, including the following steps:

(a) The user initiates a trunking call through the terminal. During the call setup process, the base station system establishes resources for the user and performs traffic channel assignment to the user.

(b) after receiving the service channel assignment message, the calling terminal authorizes itself to instruct the user to speak;

(c) the calling terminal buffers the voice message, and the base station system establishes a traffic channel for the calling terminal, and completes a subsequent call setup process, where the user is the first calling user in the group, and then The calling terminal forwards the authorization speech message;

(d) After receiving the authorization speech message, the calling terminal sends the buffered voice message to the base station system, and the cluster call starts.

Further, in a preferred embodiment:

During the call setup process of step (a), the base station system indicates in the traffic channel assignment message sent to the user whether the user is the first caller in the group;

In step (b), after receiving the service channel assignment message, the calling terminal determines whether it is the first calling user in the group according to the information therein, and if so, authorizes and prompts the user to speak, and performs Step (c); otherwise, it does not authorize and instruct the user to speak, and performs a normal call setup process, ending.

As can be seen from the above, the first paging user in the group receives the channel assignment message, and then grants a voice to the user. The terminal caches the voice message and processes it in parallel with the subsequent group call establishment process, thereby effectively shortening the cluster call establishment. The time of the cluster call establishment time is more than 2 seconds, and the method provided by the present invention can shorten the cluster call time to about 1 second, thereby meeting the requirements of rapid access of cluster users. BRIEF abstract 1 is a schematic diagram of a network structure of a trunking communication system;

2 is a flow chart of establishing a trunk call of a trunking communication system in the prior art;

Figure 3 is a flow diagram of one embodiment of the present invention. Preferred embodiment of the invention

In order to realize the rapid establishment of a call, after receiving the assignment message of the base station, the terminal determines that it is the first caller in the group, and then authorizes the speech to itself, instead of waiting for the cluster after all the call flows are completed. The authorization of the scheduling server, the terminal buffers the voice message, and after receiving the authorization of the cluster scheduling server, sending the voice=艮文 to the air can effectively save the call setup time and improve the user satisfaction.

The following is a detailed description of the present invention by taking a cluster communication system of a code division multiple access (CDMA) system as an example and combining the drawings.

The trunking call can be a group call or a single call. In this embodiment, the group call is taken as an example. The caller is assumed to be the first caller in the group. The call flow is as shown in FIG. 3, and includes the following steps:

Step 301: The cluster user initiates a group call request by using the terminal (the originating cluster terminal), and the originating message is transmitted to the cluster scheduling server by the base station system and the cluster scheduling client;

This user may be the first user in the group to initiate a call, or it may be an active late access user. For users who are actively late access, it is not appropriate to authorize their own speech.

Step 302: The cluster scheduling server sends the user connection request message to the cluster scheduling client, where the message indicates whether the user is the first calling user in the group;

Step 303: The cluster scheduling client sends the user connection request message to the base station system, where the message indicates whether the user is the first calling user in the group;

Step 304: The base station system establishes a group call service channel for the user, and performs traffic channel assignment to the user, and indicates, in the channel assignment message, whether the user is the first caller user in the group;

Step 305: After receiving the channel assignment message, the calling cluster terminal can determine that it is the first calling user in the group according to the information, authorizes itself, and prompts the user to speak, and simultaneously caches the voice message of the user. ;

Step 306, the base station system performs a capture process on the terminal, that is, the establishment of an air traffic channel. a process of establishing a link between the base station system and the cluster scheduling client and a link between the cluster scheduling client and the cluster scheduling server;

Step 307: The base station system notifies the cluster scheduling client that the call setup is completed.

Step 308, the cluster scheduling client forwards the cluster call setup completion message to the cluster scheduling server.

Step 309, the cluster scheduling server authorizes a speech to the calling cluster terminal, and the message is forwarded to the cluster terminal of the calling group by the cluster scheduling client and the base station system;

Step 310: The calling cluster terminal sends a cluster authorization confirmation message to the cluster scheduling server, and the message is forwarded to the cluster scheduling server by the base station system and the cluster scheduling client.

Step 311: The calling cluster terminal sends the buffered voice message to the system, and the cluster call starts. At this time, there is a certain voice delay, but since the calling and calling establishment process is parallel, the delay is not large, and after the call right switching, there is no delay due to the cache.

If the calling user is the active late access user, in step 305, the calling cluster terminal determines that it is not a calling user in the group, the terminal does not authorize itself, does not prompt the user to speak, and does not execute. Subsequent steps 309~311.

It should be noted that the resource allocation manner according to the trunk call can be divided into two types: The first type of the former reverse signaling channel of each user is unique, and the traffic channel in the same cell is shared, which is called an enhanced group. . In addition, all signaling and traffic channels in each cell are shared, which is called a legacy group. However, the two are consistent with the establishment process of the calling user, and the calling user has its own connection request message and traffic channel assignment message. Therefore, the present invention is applicable to both the conventional group and the enhanced group. For the called user, the present invention can be handled by existing processes. For the enhanced group, a connection request message is sent to each called user, but for the legacy group, only a traditional connection request message is sent to the BSC where the called user is located. It will not be described in detail here.

A single call can be seen as a group call of two people, and the above call flow can also be used. The specific way of allocating resources in the air may be different. The present invention is also capable of other various embodiments, and the various changes and modifications are intended to be included in the scope of the invention. range.

Industrial applicability

The invention can be applied to a trunking communication system of a CDMA system, which effectively shortens the time for establishing a cluster call and meets the requirements for rapid access of cluster users.

Claims

Claim

1. A method for fast access in a cluster communication, comprising the following steps:

2. The method according to claim 1, wherein the trunk call is a group call.

3. The method of claim 1, wherein the trunk call is a single call.

4. The method of claim 1 wherein:

5. The method of claim 4, wherein: step (a) is further divided into the following steps:

(al) The cluster user initiates a cluster call through the terminal, and the originating message is transmitted to the cluster scheduling server through the base station system and the cluster scheduling client;

2) The cluster scheduling server sends the user connection request message to the cluster scheduling client, and the message indicates whether the user is the first calling user in the group;

3) The cluster scheduling client sends the user connection request message to the base station system, and the message is marked Explain whether the user is the first caller in the group;

(a4) The base station system establishes a group call traffic channel for the user, and performs traffic channel assignment thereto, and indicates in the channel assignment message whether the user is the first caller user in the group.