CN1292603C - Mobile communication system device and method for realizing trunking service - Google Patents

Abstract

The present invention discloses a mobile communication system device for realizing cluster service in the field of mobile communication. A cluster accepting and processing station (106) gives numbers and rights for a cluster terminal (101); the call of the cluster terminal (101) is transmitted to a cluster dispatching client side (103) through a cluster base station (102), and a movable exchange center (107) is informed. The call is forwarded to a cluster dispatching server (104) through the cluster dispatching client side (103); the cluster dispatching server (104) enquires a cluster dispatching database (105) to start group call business for all cluster terminals (101) in the group, and grouped data is repeated to be distributed to other cluster terminals (101) in the group. The present invention overcomes the defects of the prior art that the capacitance of a TDMA multiple access mode is limited, the switching success ratio and the data throughput are low, and a CDMA2000 system does not support the cluster communication system function; the present invention realizes the cluster service function of the mobile communication system.

Description

Mobile communication system device and method for realizing trunking service

technical field

The invention relates to the third generation cellular mobile communication system and trunking communication system, in particular to a code division multiple access cellular mobile communication system for realizing trunking services.

Background technique

The trunking communication system belongs to the special dispatching communication system, including special command and dispatching communication. The special dispatching communication system is an earlier communication method, from the form of one-to-one walkie-talkie, the same-frequency simplex network form, the different-frequency single ( Double) working network form to single channel one call all response and further system with selective call function, has been developed to the current multi-channel automatic dialing system. In the past ten years, the dedicated dispatching communication system has developed to a higher level and has become a dispatching system shared by multi-channel users. This system is called a trunking communication system. An integrated communication group system must have at least two functions, one is group calling; the other is that users can talk without getting a response from other users after pressing the "Join" button.

A trunked communication system is a dedicated mobile communication system that allows multiple users to share the same set of wireless channels and use these channels dynamically. In some countries with relatively developed social economy, industry and agriculture, enterprises, institutions, industrial and mining, oil fields, farms, public security, police and military departments that have high requirements for command and dispatch functions are in urgent need of such systems.

The trunking communication system can be divided into analog trunking communication system and digital trunking communication system according to the technical standards adopted inside the system. Integrated digital enhanced network (iDEN, integrated Digital Enhanced Network) digital trunking communication system and terrestrial trunking radio (TETRA, Terresttial Trunked Radio) communication system are two digital trunking communication systems of TDMA standard widely used at present. These two digital trunking communication systems are realized through the second-generation digital communication technology, and both adopt the TDMA multi-access method. Today, as the third-generation communication technology has matured, the TDMA system has been unable to meet the growing communication needs due to defects such as inability to smoothly evolve to 3G, limited capacity, low handover success rate, and low data throughput. The CDMA2000 system has a wideband spread spectrum air interface, which can meet the needs of the third-generation wireless communication system and communication system. It not only provides traditional voice services, but also provides high-speed packet data services. The system widely adopts reverse pilot technology, high-efficiency air coding method, diversity receiving technology and fast power control technology, so that the system spectrum utilization rate is increased and the system capacity is increased. In addition, due to the unique soft handover function of the code division multiple access system, more stable transmission of data services can be guaranteed. If the CDMA2000 system technology can be combined with the trunking communication system technology, not only can the advantages of CDMA2000 technology be brought into play, but also the trunking business requirements such as group call and group call can be realized. However, the existing code division multiple access system is only for civil mobile Users of the communication network system cannot support the functions of the trunking communication system. However, the existing TDMA-based digital trunking communication system has disadvantages such as limited capacity, low switching success rate, and poor stability of data services.

Contents of the invention

The purpose of the present invention is to overcome the defects of limited capacity, low switching success rate and low data throughput of the TDMA multiple access mode existing in the prior art, and that the CDMA2000 system is only aimed at the users of the civil mobile communication network system and cannot support the function of the trunking communication system , to propose a mobile communication system device and method that can effectively increase system capacity, improve data service stability, and realize trunking services.

In order to achieve the above object, the present invention constructs a mobile communication system device for realizing trunking services, which includes a trunking base station and a mobile switching center, and is characterized in that it also includes a trunking terminal, a trunking scheduling client, a trunking scheduling server, a trunking scheduling database and Cluster reception desk;

The trunking reception station allocates a number for a certain trunking terminal and opens the authority, and saves the information of the trunking terminal in the trunking scheduling database; When a call is made, the call is sent to the trunking dispatching client through the trunking base station, and the mobile switching center is notified that the trunking terminal is in a conversation state to prevent other users from calling the trunking terminal; the call passes through the trunking dispatching client The terminal forwards to the cluster scheduling server, the cluster scheduling server queries the cluster scheduling database, initiates a group call service to all cluster terminals in the group according to the target group of the group call, and sends a call to the cluster terminal as the calling party The packet data uploaded by the terminal is copied, and then distributed to other cluster terminals in the group.

The cluster base station further includes a cluster base station transceiver and a cluster base station controller.

The present invention also provides a mobile communication system method for realizing trunking services, which is characterized in that it includes

In the first step, the system is initialized, and a signaling link is established between the cluster base station, the cluster scheduling client and the cluster scheduling server;

In the second step, the cluster terminal in the group initiates a registration message after starting up;

In the third step, the trunking terminal in the group initiates a trunking call;

In the fourth step, the cluster base station allocates air resources for the cluster terminal and establishes an air link;

In the fifth step, the cluster base station sends the message of calling the cluster terminal to the cluster scheduling server through the cluster scheduling client;

In the sixth step, the cluster scheduling server initiates a cluster service establishment request to other cluster terminals in the group through the cluster scheduling client and the cluster base station;

In the seventh step, the cluster terminal in the group establishes a connection with the network side, that is, the cluster scheduling server arbitrates the cluster call requests of different cluster terminals, and authorizes a certain user cluster terminal to talk;

In the eighth step, the trunking scheduling server copies the voice frames transmitted from the trunking base station, and distributes them to other trunking terminals in the group, and the system enters the trunking call state.

The mobile communication system device and method for realizing trunking services described in the present invention combine the code division multiple access cellular communication system with the dedicated dispatching communication system, which overcomes the limited capacity of the TDMA multiple access mode in the prior art, the handover success rate and the data The throughput is low, and the CDMA2000 system is only aimed at public network users and cannot support the function of the trunking communication system. It has successfully realized the trunking business function of the mobile communication system, met the requirements of the third-generation digital trunking system, and well adapted to the communication system. system development needs.

Description of drawings

FIG. 1 is a structural diagram of a mobile communication system device for realizing trunking services according to the present invention.

Fig. 2 is a flow chart of the mobile communication system method for realizing the trunking service according to the present invention.

Detailed ways

The present invention will be further described below in conjunction with specific embodiment:

In the structural diagram of the mobile communication system device for realizing the trunking service shown in FIG. 1, the mobile communication system device for realizing the trunking service includes a trunking base station 102 and a mobile switching center 107, and is characterized in that it also includes a mobile communication system for supporting the trunking service The trunking terminal 101, the trunking scheduling client 103 and the trunking scheduling server 104, the trunking scheduling database 105 and the trunking reception station 106, when the trunking terminal 101 initiates a call within a group, the call is sent to the trunking base station 102 The cluster scheduling client 103 is forwarded to the cluster scheduling server 104 through the cluster scheduling client 103, and the cluster scheduling server 104 queries the cluster scheduling database 105, and according to the target group of the group call, sends All trunking terminals in the group initiate a group call service, and copy the packet data uploaded by the calling party, and then distribute it to the trunking terminals 101 in the group.

Wherein, the trunking terminal 101 not only has various functions of the CDMA2000 system, but also adds a PTT (PushToTalk, push-to-talk) button to support group calls and private calls of the trunking; the trunking base station 102 is compatible with the functions of the CDMA20001X base station, and can be The user provides more trunking services; the function of the trunking dispatching client 103 is as an access gateway for trunking calls, providing signaling and service links between the trunking base station 102 and the trunking dispatching server 104, and performing voice traffic flow of the trunking service Collection and distribution (Dispatch); the trunking dispatch server 104 is the centralized control point of the trunking service, used for trunking terminal authentication, establishing a trunking call, arbitrating call requests between trunking terminals 101 in the group, and receiving trunking service voice packets from the uplink , and distributed to the downlink. Technically, packet data is selected for distribution. Since it supports a very large cluster terminal 101 in the group, it has higher requirements on the scheduling algorithm and requires a significant improvement in performance. Circuit switching can only The processing capacity of 20 to 30 users in the processing group can be increased to 100,000 users in each group; the cluster base station 102 and the cluster scheduling client 103, and the cluster scheduling client 103 and the cluster scheduling server 104 each establish a link in the system initialization stage , used to carry air messages and trunking call control messages, this link is public, one for each trunking dispatching client 103, shared by all trunking terminals that set up a call on the trunking dispatching client 103; When , multiple links (one for each user) are established between the cluster base station 102 and the cluster scheduling client 103 for transmitting voice service frames. Multiple links (one for each group) are set up between the cluster scheduling client 103 and the cluster scheduling server 104 for transmitting voice service frames; the cluster scheduling database 105 is used as the data management entity of the cluster system, for cluster groups and group members Register and save the information of the group members, identify the service authority for the cluster group members, and perform statistics and billing functions at the same time; the cluster reception desk 106 allocates numbers for the cluster users, and manages the authority of the cluster group.

The trunking base station 102 includes two parts, a trunking base station controller and a trunking base station transceiver, and mainly completes access functions of trunking services, data services and ordinary telephone services. Among them, the trunking base station transceiver completes the modulation and demodulation of the trunking system baseband signal, the transceiver of the radio frequency signal and other functions, and the trunking base station controller completes the allocation of wireless resources, call processing, power control and various switching of the trunking system. Clustered base station controllers and clustered base station transceivers of different power levels can form star-shaped connections and linear connections, so as to realize the coverage of large-area system, small-scale system, and even pico-cell system, so as to meet the needs of various users in network operation various coverage requirements.

Fig. 2 is the flowchart of the mobile communication system method that realizes trunking service described in the present invention, specifically comprises the following steps:

201 start;

202 system initialization, a signaling link is established between the cluster base station 102, the cluster scheduling client 103 and the cluster scheduling server 104;

203 Initiate a registration message after the user in the group turns on the machine. In addition to initiating a registration message to the mobile switching center 107, the cluster user also needs to initiate a cluster registration message to the cluster scheduling server 104;

204. The trunking terminal 101 of the user in the group initiates a trunking call, and may send the trunking control message in a short message burst format;

205. The cluster base station 102 allocates air resources for the cluster terminal 103, and establishes an air connection link;

206, the trunking base station 102 sends the message of calling the trunking terminal to the trunking scheduling server 104 through the trunking scheduling client 103, and establishes a service link between the trunking base station 102, the trunking scheduling client 103, and the trunking scheduling server 104;

207. The cluster scheduling server 104 initiates a cluster service establishment request to other users in the group through the cluster scheduling client 103 and the cluster base station 102;

208. Other trunking terminals 101 in the group respond to the trunking call request, and the trunking scheduling server 104 arbitrates the trunking call requests of different users, and authorizes a certain user to talk. As long as more than one user in the group is established successfully, the trunking in the group can be performed. call;

209, the trunking scheduling server 104 copies the voice frame transmitted by the base station, and distributes it to other users in the group, and the system enters the trunking call state;

210, end.

Wireless communication technology is gradually developing towards the third-generation mobile communication technology. Trunking communication also needs to introduce the third-generation mobile communication technology due to its business diversification and broadband. However, due to the current lag in the development of digital trunking systems, and all The TDMA mode is the way. The CDMA system trunking system proposed by the present invention not only overcomes the defects of limited capacity, handover success rate and low data throughput of the TDMA multiple access mode in the prior art, but also avoids that the CDMA2000 system is only for public Network users can not support the defects of trunking communication system functions, and propose a mobile communication system device using CDMA trunking service. The CDMA trunking system can meet the requirements of the third-generation digital trunking system and adapt to the development of communication. The demand has promoted the development of the digital trunking system.

Claims (5)

1, a kind of mobile communication system device of realizing group service, comprise trunked base station (102) and mobile switching centre (107), it is characterized in that, also comprise colony terminal (101), cluster client end (103), trunking dispatch server (104), colony dispatching database (105) and cluster handling desk (106);

Described cluster handling desk (106) is distributed telephone numbers for a certain colony terminal (101) and is opened authority, and the information of this colony terminal (101) is kept in the described colony dispatching database (105); When the calling in group of colony terminal (101) initiation that described cluster handling desk (106) is distributed telephone numbers, this calling sends to described cluster client end (103) by described trunked base station (102), and notify this colony terminal of described mobile switching centre (107) (101) to be in talking state, prevent this colony terminal of other customer calls (101); This calling is forwarded to described trunking dispatch server (104) through described cluster client end (103), described trunking dispatch server (104) inquiry described colony dispatching database (105), target group according to group calling, all colony terminals (101) in group are initiated group-calling service, and the grouped data of uploading as the described colony terminal (101) that works the side of exhaling duplicated, be distributed to other colony terminals (101) in the group then.

2, the mobile communication system device of realization group service according to claim 1, it is characterized in that, described trunked base station (102) further comprises trunked base station transceiver and trunked base station controller, described trunked base station transceiver is finished the modulation and demodulation of group system baseband signal, the transmission-receiving function of radiofrequency signal, and described trunked base station controller is then finished all kinds of switchings of wireless resource allocation, call treatment, power control and group system.

3, the mobile communication system device of realization group service according to claim 2 is characterized in that, the described trunked base station transceiver of described trunked base station controller and different capacity grade is formed and is connected starlike the connection with line style.

4, a kind of mobile communication system method that realizes group service is characterized in that, may further comprise the steps:

The first step, system initialization is set up signaling link between trunked base station (102), cluster client end (103) and trunking dispatch server (104);

In second step, registration message is initiated in colony terminal (101) start back in the group;

In the 3rd step, colony terminal (101) is initiated trunked call in the group;

In the 4th step, trunked base station (102) is that this colony terminal (101) distributes air resource, sets up airlink;

In the 5th step, trunked base station (102) will work the message of exhaling colony terminal (101) and send to trunking dispatch server (104) by cluster client end (103);

In the 6th step, trunking dispatch server (104) is by cluster client end (103) and trunked base station (102), and other colony terminals (101) in group are initiated group service and set up request;

In the 7th step, colony terminal (101) connects with network side in the group;

In the 8th step, trunking dispatch server (104) is duplicated the speech frame that trunked base station (102) sends, and is distributed to other colony terminals (101) in the group, and system enters cluster calling state.

5, the mobile communication system method of realization group service according to claim 4, it is characterized in that, described the 7th step " group in colony terminal (101) connect with network side " is meant that trunking dispatch server (104) arbitrates the cluster call request of different colony terminals (101), authorizes certain user's colony terminal (101) to converse.

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