CN103533513A - Digital trunking communication system and construction method thereof - Google Patents

Digital trunking communication system and construction method thereof Download PDF

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Publication number
CN103533513A
CN103533513A CN201210231730.3A CN201210231730A CN103533513A CN 103533513 A CN103533513 A CN 103533513A CN 201210231730 A CN201210231730 A CN 201210231730A CN 103533513 A CN103533513 A CN 103533513A
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pds
communication system
enodeb
terminal
trunking
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CN103533513B (en
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王小平
王璐
王芳
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Beijing ZTE Gundam Communication Technology Co.,Ltd.
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ZTE Corp
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Abstract

The invention discloses a digital trunking communication system and a construction method thereof. The digital trunking communication system comprises a terminal, an evolved Node B (eNodeB) and a trunking dispatching subsystem. The trunking scheduling subsystem comprises a PTT dispatching server (PDS), a PTT home register (PHR), a dispatching agent server (DAS) and a dispatching agent client (DAC). The eNodeB is connected with the PDS and provides an air radio bearer for trunking communication between the terminal and the PDS. The PDS is connected with the DAS and the PHR, and the DAS is connected with the DAC. The PDS is used for performing trunking call establishment and release and voice collection and forwarding, the PHR is used for managing clusters, groups and users in a trunking and performing authentication, authorization and accounting, the DAS is used for performing DAC access and providing dispatching agent service for the users, and the DAC is used for providing a man-machine interface and initiating a trunking call to the groups and the users in the clusters. A LTE EPC core network can be isolated, and the digital trunking communication system is compatible with an existing cluster system.

Description

A kind of digital clustering communication system and construction method thereof
Technical field
The present invention relates to trunking communicating technology field, relate in particular to a kind of digital clustering communication system and construction method thereof.
Background technology
The private wireless communication system that trunked communication system is developed in order to meet industry user's command scheduling demand, applied towards specific industry; In trunked communication system, a large amount of wireless users share a small amount of wireless channel, take command scheduling as main body application; Trunked communication system is a kind of multipurpose, dynamical wireless communication system.
Trunked communication system has experienced and the similar development course of cell mobile communication systems:
First generation group system is simulation trunked communication system, main support voice communication;
Second generation group system is narrow-band digital trunked communication system, is also the most widely used trunked communication system of Present Domestic, and narrow-band digital trunked communication system support voice is communicated by letter with low speed data (the highest 28.8kbps).
From the development of current cluster communication system, the development of trunked communication system lags far behind the development of public's cellular system, and the aspects such as its technological innovation and industrial chain are all also complete not to the utmost.Aspect the tenability of data transmission capabilities and multimedia service, current narrow-band digital trunked communication system is still relatively backward; Current narrow-band digital trunked communication system does not all reach the message transmission rate of the Mbps order of magnitude, aspect the availability of frequency spectrum and covering, can not well satisfy the demands.
Along with the develop rapidly of mobile Internet and the Large scale construction in global radio city, the broadband development trend that becomes whole radio communication.Tradesman carries out in the process of command scheduling in application cluster communication system, not only requires " hearing ", also requires " visible ".Correspondingly, trunked communication system is technically also by future development broadband to the variation of system IPization, business, data, terminal multimode.From concrete application point, be mainly reflected in high-speed data, video and be implemented in the multiple application on this basis, comprise the aspects such as mobile office, multimedia cluster scheduling, video monitoring, City Emergency Linkage Control System.
New trunked communication system requires towards following target development: larger channel capacity, the higher availability of frequency spectrum, better transmission performance, adopt low-cost, scalable, configurable IP full wireless multi-media network framework, compatible existing group system, and can realize smooth evolution.
Yet the typical implementation method of the digital cluster system based on Long Term Evolution (LTE, Long Term Evolution) is that all network elements of current LTE are redesigned at present, to be adapted to group system, its framework as shown in Figure 1.In the network architecture shown in Fig. 1:
The base station of evolution (eNodeB) transformed, increased wireless colony scheduling feature module (RTDF), be responsible for the relevant treatment of group service, from the Mobility Management Entity (eMME) of evolution, receive cluster control command, for terminal distribution Radio Resource, and the business data flow that the business initiating terminal receiving from gateway (SGW) is initiated is sent to business receiving terminal;
EMME is transformed, increased cluster and controlled functional module (TCF), be responsible for setting up, safeguard and discharge group service, carry out management and the scheduling of right of speech;
The packet data gateway of evolution (e-PGW) is transformed, has been increased cluster block functions module (TPF), be responsible for group service data flow mapping, copy and distribute;
The home subscriber server of evolution (eHSS) is transformed, increased cluster user service (TSS), be responsible for the store and management group user profile relevant to group service.
In addition, for supporting dispatching desk function, need newly-increased scheduling gateway (D-GW), be connected with ePGW with eMME, eHSS.
Yet the major defect of this implementation method is:
1, LTE EPC core net has been carried out to modernization overlay, interface is privatization, cannot standardization;
2 ,Dui operator costs are larger, for supporting clustering functionality, need to carry out complete upgrading to existing LTE network; Maintenance cost is high, and the existing module of LTE or newly-increased cluster module are upgraded, and all can bring impact;
3, cannot compatible existing group system, concerning the built operator that is provided with group system, cannot accomplish smooth upgrade, for supporting LTE cluster, need to again build, bring huge waste;
4, for supporting dispatching desk function, need to increase D-GW network element newly, this network element need to all be connected with ePGW with eMME, eHSS, has caused the complicated of interface, is not easy to safeguard.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of digital clustering communication system and construction method thereof, with solve in prior art the digital cluster system based on LTE to LTE EPC core net change large, cannot compatible existing group system etc. problem.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of digital clustering communication system, comprise: the base station eNodeB of terminal, evolution and trunking dispatching subsystem, described trunking dispatching subsystem comprises: dispatch server PDS, home location register PHR, dispatching desk server DAS, dispatching desk client DAC;
Described eNodeB is connected with PDS, for the trunking communication between described terminal and PDS provides on-air radio carrying; Described PDS connects described DAS and PHR, and described DAS connects described DAC;
Wherein, described PDS, for carrying out collecting and forwarding of the foundation of trunked call and release, voice;
Described PHR, for the group of cluster, group and user are managed, and carries out authentication, authentication and charging;
Described DAS, for carrying out DAC access, for user provides dispatching desk service;
Described DAC, for providing group, user in man-machine interface ,Dui group to initiate trunked call.
Described PDS comprises chain of command PDS and medium surface PDS, and the interface of realizing by the general packet radio service tunnel agreement GTP-C based on chain of command between described chain of command PDS and medium surface PDS is connected.
Between described eNodeB and chain of command PDS, by the interface of realizing based on SCTP SCTP, be connected;
The interface of realizing by the general packet radio service tunnel agreement GTP-U based on user's face between described eNodeB and medium surface PDS is connected.
Described chain of command PDS is at least carrying out following processing:
The registration of cluster user and authentication;
The management of group service;
The renewal in terminal location district;
Set up, discharge or revise terminal context;
Activation, deexcitation carrying;
Service paging.
Described medium surface PDS is at least carrying out following processing:
Activation, deexcitation carrying;
The forwarding of Media Stream, the eNodeB by the forwarding media stream of speech user in calling out to listening user place in calling out.
Described eNodeB is at least carrying out following processing:
The cluster state of terminal is reported to PDS;
Point-to-point signaling bear between the terminal that group service is relevant and eNodeB;
Point-to-point signaling bear between the terminal that group service is relevant and PDS;
The trunked call control signal of PDS is handed down to terminal;
Group service carrying is set up and is controlled.
The present invention also provides a kind of construction method of digital clustering communication system, described digital clustering communication system consists of base station eNodeB and the trunking dispatching subsystem of terminal, evolution, and described trunking dispatching subsystem comprises: dispatch server PDS, home location register PHR, dispatching desk server DAS, dispatching desk client DAC; The method comprises:
Described eNodeB is connected with PDS, and described PDS is connected respectively with PHR with described DAS, and described DAS is connected with described DAC; Described eNodeB carries for the trunking communication between described terminal and PDS provides on-air radio.
Described PDS comprises chain of command PDS and medium surface PDS, and the method also comprises:
The interface of realizing by the general packet radio service tunnel agreement GTP-C based on chain of command between described chain of command PDS and medium surface PDS is connected.
The method also comprises:
Between described eNodeB and chain of command PDS, by the interface of realizing based on SCTP SCTP, be connected;
The interface of realizing by the general packet radio service tunnel agreement GTP-U based on user's face between described eNodeB and medium surface PDS is connected.
A kind of digital clustering communication system provided by the present invention and construction method thereof, based on LTE system, by trunking dispatching subsystem is expanded, improve the eNodeB in LTE, realized the digital cluster system based on LTE; This system is isolated LTE EPC core net completely, and the business of can accomplishing is isolated completely, and this system architecture flexibly, be easy to expansion.
Accompanying drawing explanation
Fig. 1 realizes the network architecture schematic diagram of digital clustering communication system based on LTE in prior art;
Fig. 2 is the network architecture schematic diagram of a kind of digital clustering communication system of the embodiment of the present invention;
Fig. 3 is the flow chart that the starting up of terminal at a kind of cluster user place of the embodiment of the present invention is registered.
Embodiment
Below in conjunction with the drawings and specific embodiments, the technical solution of the present invention is further elaborated.
A kind of digital clustering communication system that the embodiment of the present invention provides, as shown in Figure 2, mainly comprises: the universal mobile telecommunications system land radio access web (E-UTRAN) of terminal, evolution, trunking dispatching subsystem.Terminal comprises subscriber equipment (UE), fixed station, Vehicle mounted station, wireless dispatching desk etc.; E-UTRAN comprises eNodeB; Trunking dispatching subsystem comprises dispatch server (PDS), home location register (PHR), dispatching desk server (DAS) and dispatching desk client (DAC).
Wherein, eNodeB is connected with PDS, for the trunking communication between terminal and PDS provides on-air radio carrying; PDS connects DAS and PHR, and DAS connects DAC.
PDS, is the control centre of cluster service, for carrying out foundation and the release of trunked call, as: differentiate that one by saying (PTT, Push To Talk) user, set up PTT calling, judging PTT request etc.; PDS is also for carrying out collecting and the processing such as forwarding of voice, as: the PTT voice packet that receiving uplink comes, and be distributed to down link;
PHR, for the group of cluster, group and user are managed, and carries out authentication, authentication and charging; Digital clustering communication system provides cluster service for group, and described group is comprised of a plurality of groups and user, and each user can belong to a plurality of groups;
DAS, for carrying out DAC access, for user provides dispatching desk service;
DAC, for providing group, user in man-machine interface ,Dui group to initiate trunked call.
Preferably, in order to tackle, different networking scene requires and the networking structure of LTE flattening, and PDS is divided into chain of command PDS (C-PDS) and medium surface PDS (M-PDS).
Accordingly, between eNodeB and C-PDS, by T1-C interface, be connected, T1-C interface is the expansion of S1 interface, based on SCTP (SCTP, Stream Control Transmission Protocol), realizes; Between eNodeB and M-PDS, by T1-U interface, be connected, T1-U interface is the expansion of S1 interface, and the general packet radio service tunnel agreement based on user's face (GTP-U, GPRS Tunneling Protocol for the user plane) realizes; Between C-PDS and M-PDS, by T11 interface, be connected, T11 interface is the expansion of S11 interface, general packet radio service based on chain of command (GPRS) tunnel protocol (GTP-C, GPRS Tunneling Protocol for control plane) is realized.
In addition, between C-PDS and DAS, based on User Datagram Protoco (UDP) (UDP, User Datagram Protocol), communicate by letter; Between C-PDS and PHR, based on remote authentication dial-in user, serve (RADIUS, Remote Authentication Dial In User Service) protocol communication; Between DAS and DAC, based on UDP/ HTTP (HTTP, Hypertext Transport Protocol), communicate by letter; Between DAC and M-PDS, by RTP (RTP, Real-time Transport Protocol), communicate by letter.Between eNodeB and terminal, by LTE-Uu interface, be connected.
Wherein, C-PDS is mainly responsible for realizing following functions:
1) registration of cluster user and authentication;
2) management of group service;
4) renewal in terminal location district;
5) set up, discharge or revise terminal context;
6) activation, deexcitation carrying;
7) service paging.
M-PDS is mainly responsible for realizing following functions:
1) activation, deexcitation carrying;
2) forwarding of Media Stream, the eNodeB by the forwarding media stream of speech user in calling out to listening user place in calling out.
ENodeB is mainly responsible for realizing following functions:
1) cluster state of terminal is reported to PDS, as obtain group in user's number of current area, to carry out management of downlink resource etc.;
2) terminal that group service is relevant and the point-to-point signaling bear between eNodeB, Radio Resource is controlled (RRC, Radio Resource Control) connection;
3) terminal that group service is relevant and the point-to-point signaling bear between PDS, i.e. context;
4) the trunked call control signal of PDS is handed down to terminal;
5) group service carrying is set up and is controlled.
Preferably, digital clustering communication system can also comprise the operation and maintenance sub system being connected with trunking dispatching subsystem, for the relevant configuration of group service, performance statistics, service observation etc.
The embodiment of the present invention also provides a kind of method that builds above-mentioned digital clustering communication system, mainly comprises: eNodeB is connected with PDS, and PDS is connected respectively with PHR with DAS, and DAS is connected with DAC; ENodeB carries for the trunking communication between terminal and PDS provides on-air radio.
Preferably, PDS comprises C-PDS and M-PDS, and the method also comprises: between C-PDS and M-PDS, by T11 interface, be connected, T11 interface is the expansion of S11 interface, based on GTP-C, realizes; Between eNodeB and C-PDS, by T1-C interface, be connected, T1-C interface is the expansion of S1 interface, based on SCTP, realizes; Between eNodeB and M-PDS, by T1-U interface, be connected, T1-U interface is the expansion of S1 interface, based on GTP-U, realizes.
In addition, between C-PDS and DAS, based on UDP, connect; Between C-PDS and PHR, based on radius protocol, connect; Between DAS and DAC, based on UDP/HTTP, connect; Between DAC and M-PDS, based on RTP, connect.Between eNodeB and terminal, by LTE-Uu interface, be connected.
On the basis of above-mentioned digital clustering communication system, the embodiment of the present invention also provides the flow process of the starting up of terminal registration at a kind of cluster user place, during the starting up of terminal at cluster user place, can directly skip the register flow path on EPC in prior art, and directly on C-PDS, register.As shown in Figure 3, UEA is cluster user, and eNodeB A is the base station at UEA place, and the flow process that UEA carries out cluster registration at C-PDS mainly comprises:
Step 101, UE A sets up RRC with the eNodeB A at its place and is connected.
Step 102, UEA is based on Non-Access Stratum (NAS) agreement, and signalling of bouquet registration request (Trunking Attach Request) message is to eNodeB A; ENodeB A sends to C-PDS to process the Trunking Attach Request message of reception by T1-C interface.
In Trunking Attach Request message, carry the international mobile subscriber identity (IMSI of UEA, International Mobile Subscriber Identification Number), the content such as international mobile equipment identification number (IMEI, International Mobile Equipment Identity).
Step 103, C-PDS carries out authentication according to the information such as IMSI/IMEI in Trunking Attach Request message to UEA, and tracking area (TA, the Tracking Area) information of storage or renewal UE.
Step 104, after the authentication of UEA is passed through, C-PDS, based on NAS agreement, returns to cluster registration to UEA and accepts (Trunking Attach Accept) response message.
In sum, the embodiment of the present invention is by expanding trunking dispatching subsystem, the eNodeB in LTE being improved, the digital cluster system based on LTE system of realizing, impact on existing LTE EPC core net is little, can isolate LTE EPC core net completely, the business of can accomplishing is isolated completely; And the digital cluster system of the embodiment of the present invention can provide larger channel capacity, the higher availability of frequency spectrum, better transmission performance, adopt low-cost, scalable, configurable IP full wireless multi-media network framework, can be good at compatible existing group system, realize business isolation, and can realize smooth evolution.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.

Claims (9)

1. a digital clustering communication system, it is characterized in that, comprise: the base station eNodeB of terminal, evolution and trunking dispatching subsystem, described trunking dispatching subsystem comprises: dispatch server PDS, home location register PHR, dispatching desk server DAS, dispatching desk client DAC;
Described eNodeB is connected with PDS, for the trunking communication between described terminal and PDS provides on-air radio carrying; Described PDS connects described DAS and PHR, and described DAS connects described DAC;
Wherein, described PDS, for carrying out collecting and forwarding of the foundation of trunked call and release, voice;
Described PHR, for the group of cluster, group and user are managed, and carries out authentication, authentication and charging;
Described DAS, for carrying out DAC access, for user provides dispatching desk service;
Described DAC, for providing group, user in man-machine interface ,Dui group to initiate trunked call.
2. digital clustering communication system according to claim 1, it is characterized in that, described PDS comprises chain of command PDS and medium surface PDS, and the interface of realizing by the general packet radio service tunnel agreement GTP-C based on chain of command between described chain of command PDS and medium surface PDS is connected.
3. digital clustering communication system according to claim 2, is characterized in that,
Between described eNodeB and chain of command PDS, by the interface of realizing based on SCTP SCTP, be connected;
The interface of realizing by the general packet radio service tunnel agreement GTP-U based on user's face between described eNodeB and medium surface PDS is connected.
4. digital clustering communication system according to claim 3, is characterized in that, described chain of command PDS is at least carrying out following processing:
The registration of cluster user and authentication;
The management of group service;
The renewal in terminal location district;
Set up, discharge or revise terminal context;
Activation, deexcitation carrying;
Service paging.
5. digital clustering communication system according to claim 3, is characterized in that, described medium surface PDS is at least carrying out following processing:
Activation, deexcitation carrying;
The forwarding of Media Stream, the eNodeB by the forwarding media stream of speech user in calling out to listening user place in calling out.
6. according to digital clustering communication system described in claim 1 to 5 any one, it is characterized in that, described eNodeB is at least carrying out following processing:
The cluster state of terminal is reported to PDS;
Point-to-point signaling bear between the terminal that group service is relevant and eNodeB;
Point-to-point signaling bear between the terminal that group service is relevant and PDS;
The trunked call control signal of PDS is handed down to terminal;
Group service carrying is set up and is controlled.
7. the construction method of a digital clustering communication system, it is characterized in that, described digital clustering communication system consists of base station eNodeB and the trunking dispatching subsystem of terminal, evolution, and described trunking dispatching subsystem comprises: dispatch server PDS, home location register PHR, dispatching desk server DAS, dispatching desk client DAC; The method comprises:
Described eNodeB is connected with PDS, and described PDS is connected respectively with PHR with described DAS, and described DAS is connected with described DAC; Described eNodeB carries for the trunking communication between described terminal and PDS provides on-air radio.
8. the construction method of digital clustering communication system according to claim 7, is characterized in that, described PDS comprises chain of command PDS and medium surface PDS, and the method also comprises:
The interface of realizing by the general packet radio service tunnel agreement GTP-C based on chain of command between described chain of command PDS and medium surface PDS is connected.
9. the construction method of digital clustering communication system according to claim 8, is characterized in that, the method also comprises:
Between described eNodeB and chain of command PDS, by the interface of realizing based on SCTP SCTP, be connected;
The interface of realizing by the general packet radio service tunnel agreement GTP-U based on user's face between described eNodeB and medium surface PDS is connected.
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CN110248409A (en) * 2019-06-27 2019-09-17 海能达通信股份有限公司 Terminal registration method and system
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