CN102457813A - Point-to-point calling method in cluster system based on LTE technology, terminal thereof and system thereof - Google Patents
Point-to-point calling method in cluster system based on LTE technology, terminal thereof and system thereof Download PDFInfo
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Abstract
The invention relates to a point-to-point calling method in cluster system based on LTE technology, a terminal thereof and a system thereof. The method comprises the following steps: through a base station, a core network, an IMS domain and an application server, a source terminal establishes a conversation channel with a target terminal; through the conversation channel, transmission of voice data with the target terminal is carried out. Based on a present air interface protocol, through not changing anything as possible or carrying out function expansion as small as possible, a point-to-point cluster communication mechanism is completed, by employing IMS+PoC configuration, function expansion is carried out on partial network elements in present network configuration, and through the base station, the core network, the IMS domain and the application server, the conversation channel between the source terminal and the target terminal is established. Transmission of the voice data with the target terminal is carried out through the conversation channel, a point-to-point service of the cluster system in an LTE network is realized, and by utilizing the cluster system, compatible and fusion with a present LTE network are realized.
Description
Technical field
The present invention relates to communication technique field, relate in particular to a kind of based on point-to-point method of calling, terminal and system in the group system of LTE (Long Term Evolution, Long Term Evolution) technology.
Background technology
At present; The private wireless communication system that trunked communication system develops in order to satisfy industry user's command scheduling demand, use towards specific industry; A large amount of wireless users share a small amount of wireless channel in the system; With the command scheduling is that main body is used, and is a kind of multipurpose, dynamical wireless communication system.Trunked communication system in a government office, the market that has a wide range of applications, field such as public safety, emergency communication, electric power, civil aviaton, petrochemical industry and army.
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 the narrow-band digital trunked communication system, is current application trunked communication system the most widely.
Existing trunked communication system, still comparatively backward aspect the tenability of data transmission capabilities and multimedia service, aspects such as its technological innovation and industrial chain are all also complete not to the utmost.In present digital arrowband trunked communication system, the iDEN system time slot and modulator approach are improved the back and the broadband integrated digital enhanced network released (Wide-iDEN WiDEN), is increased to 384kbps with hardware circuit solution; The TETRA enhanced data rates for GSM evolution (TETRA Release 2 Enhanced Data Service, TEDS), ideal situation can support to be no more than the hardware circuit solution of 700kbps down, and it does not all reach the order of magnitude of Mbps.In addition, aspect the availability of frequency spectrum and covering, existing digital cluster system can not well satisfy the demands.
At present; Become the developing direction of group system of future generation based on the wideband digital group system of LTE technology; For formulating as yet based on the standards such as the network architecture, operation flow, business function and key technology of the technological wideband digital group system of LTE; Existing second generation group system then has bigger difficulty to the wideband digital group system evolution based on the LTE technology, and it does not possess with the compatible or compatibility of LTE network relatively poor.
Summary of the invention
It is a kind of based on point-to-point method of calling, terminal and system in the group system of LTE technology that main purpose of the present invention is to provide, and is intended to improve the compatibility of trunked call service and LTE network.
The present invention proposes a kind of based on point-to-point method of calling in the group system of LTE technology, comprising:
Source terminal is through the talking path between base station, core net, IMS territory and application server foundation and the purpose terminal;
Carry out the transmission of speech data through said talking path and said purpose terminal.
Preferably, said source terminal comprises through the step of the talking path between base station, core net, IMS territory and application server foundation and the purpose terminal:
Source terminal is set up RRC and is connected through sending the RRC connection request to the base station;
Send the services request that carries point-to-point trunked call sign to the base station, said services request is forwarded to core net, carry out the safety certification in IMS territory simultaneously by the base station;
Set up and the base station between radio bearer, and carry out the renewal of beared information through MME, SGW and PDN-GW in the core net;
Send session to application server and set up request message;
Receive application server and set up the conversation grant message that request message feeds back, the talking path between foundation and the purpose terminal according to said session.
Preferably, said step of carrying out the transmission of speech data through talking path and said purpose terminal comprises:
Source terminal sends speech data through said talking path to said application server; By application server said speech data is forwarded to core net; When core net judge this speech data place be carried as point-to-point type the time; By core net said speech data is forwarded to the base station, by the base station said speech data is forwarded to the purpose terminal again.
The present invention also proposes a kind of based on point-to-point calling terminal in the group system of LTE technology, comprising:
Talking path is set up module, is used for through the talking path between base station, core net, IMS territory and application server foundation and the purpose terminal;
Call out initiation module, be used for carrying out the transmission of speech data through said talking path and said purpose terminal.
Preferably, said talking path is set up module and is comprised:
The unit is set up in the RRC connection, is used for setting up RRC and connecting through sending the RRC connection request to the base station;
The services request transmitting element is used for sending the services request that carries point-to-point trunked call sign to the base station, by the base station said services request is forwarded to core net, carries out the safety certification in IMS territory simultaneously;
Radio bearer is set up updating block, be used to set up and the base station between radio bearer, and carry out the renewal of beared information through MME, SGW and PDN-GW in the core net;
The conversation request message transmitting element is used for sending session to application server and sets up request message;
Talking path is set up the unit, is used to receive application server and sets up the conversation grant message that request message feeds back according to said session, the talking path between foundation and the purpose terminal.
Preferably; Said calling initiation module also is used for sending speech data through said talking path to said application server; By application server said speech data is forwarded to core net; When core net judge this speech data place be carried as point-to-point type the time, by core net said speech data is forwarded to the base station, by the base station said speech data is forwarded to the purpose terminal again.
The present invention also proposes a kind of based on point-to-point calling system in the group system of LTE technology, comprising: the source terminal that is connected with the base station respectively and purpose terminal, the application server that is connected through core net with the base station, wherein:
Said source terminal is used for through the talking path between base station, core net, IMS territory and application server foundation and the purpose terminal; Carry out the transmission of speech data through said talking path and said purpose terminal;
Said application server, being used for through base station, core net and IMS territory is that said source terminal is set up the talking path between this source terminal and the purpose terminal, so that source terminal carries out the transmission of speech data according to said talking path and said purpose terminal;
Said purpose terminal is used for receiving the speech data that said source terminal sends through said talking path.
Preferably, said source terminal also is used for setting up RRC and connecting through sending the RRC connection request to the base station; Send the services request that carries point-to-point trunked call sign to the base station, said services request is forwarded to core net, carry out the safety certification in IMS territory simultaneously by the base station; Set up and the base station between radio bearer, and carry out the renewal of beared information through MME, SGW and PDN-GW in the core net; Send session to application server and set up request message; Receive application server and set up the conversation grant message that request message feeds back, the talking path between foundation and the purpose terminal according to said session;
Said application server, request message is set up in the session that also is used for sending at the reception sources terminal, and sets up request message feedback conversation grant message to source terminal according to said session.
Preferably, said source terminal also is used for sending speech data through said talking path to said application server;
Said application server; Also be used for said speech data is forwarded to core net; When core net judge this speech data place be carried as point-to-point type the time, by core net said speech data is forwarded to the base station, by the base station said speech data is forwarded to the purpose terminal again.
Preferably, said application server is the cluster application server based on PoC.
The present invention proposes a kind of based on point-to-point method of calling, terminal and system in the group system of LTE technology; Through on the basis of existing air interface protocol and do not change or the as far as possible little function of carrying out expands that to accomplish point-to-point trunking communication machine-processed as far as possible; Adopt the IMS+PoC framework; And the part network element in the existing network framework is done function expand, specifically set up the talking path between source terminal and the purpose terminal through base station, core net, IMS territory and application server; Carry out the transmission of speech data through talking path and said purpose terminal, realize the point-to-point service of group system in the LTE network, the compatibility and the fusion of group system utilized and existing LTE network are more arranged.
Description of drawings
Fig. 1 the present invention is based on point-to-point method of calling one embodiment schematic flow sheet in the technological group system of LTE;
Fig. 2 is the schematic network structure of the foregoing description based on the wideband digital trunked communication system of LTE technology;
Fig. 3 be the present invention is based in the group system of LTE technology that source terminal among point-to-point method of calling one embodiment is set up through base station, core net, IMS territory and application server and the purpose terminal between the talking path schematic flow sheet;
Fig. 4 the present invention is based on point-to-point calling terminal one example structure sketch map in the technological group system of LTE;
Fig. 5 the present invention is based in the group system of LTE technology among point-to-point calling terminal one embodiment talking path to set up the modular structure sketch map;
Fig. 6 the present invention is based on point-to-point calling system one example structure sketch map in the technological group system of LTE.
In order to make technical scheme of the present invention clearer, clear, will combine accompanying drawing to do further to detail below.
Embodiment
Embodiment of the invention solution mainly is through on the basis of existing air interface protocol and do not change or the as far as possible little function of carrying out expands that to accomplish point-to-point trunking communication machine-processed as far as possible; Adopt the IMS+PoC framework; And the part network element in the existing network framework is done function expand, specifically set up the talking path between source terminal and the purpose terminal through base station, core net, IMS territory and application server; Carry out the transmission of speech data through talking path and purpose terminal, realize the point-to-point service of group system in the LTE network.
As shown in Figure 1, one embodiment of the invention proposes a kind of based on point-to-point method of calling in the group system of LTE technology, comprising:
Step S101, source terminal is through the talking path between base station, core net, IMS territory and application server foundation and the purpose terminal;
The present embodiment method relates to the group system call business based on the LTE network; When a colony terminal in the group system (being that present embodiment is claimed source terminal) another colony terminal in this group system (being that present embodiment is claimed the purpose terminal) when making a call, at first need be set up the talking path between source terminal and the purpose terminal.
As shown in Figure 2, comprise based on the network configuration of the wideband digital trunked communication system of LTE technology: terminal (UE, User Equipment, user), network side and application side, wherein:
Application side, it comprises cluster application server, accomplishes the scheduling feature of group service, is the inlet of PDN Gateway.Cluster application server comprises as based on PoC (PTT Over Cellular; Push to talk over Cellular) cluster application server, based on the cluster application server of Gota (Globalopen Trunkingarchi tecture, based on open cluster architecture) and the cluster application server of other types.For the cluster application server based on PoC, when accomplishing end to end trunked call service, application side also comprises IMS (IPMultimedia Subsystem, IP Multimedia System) territory.
CSCF (Call Session Control Function, CSCF) is the inner functional entity of IMS, is entire I MS server, the main signaling control of being responsible in the processing multimedia call session process.The subscription authentication of its managing I MS network, IMS loading end QoS, cooperate the control of carrying out the SIP session with other network entities, and service negotiation and resource allocation etc.
CSCF is divided into proxy CSCF (P-CSCF, Proxy CSCF) according to function, and inquiry CSCF (I-CSCF, Interrogating CSCF) and serving CSCF (S-CSCF, Serving CSCF) are sip server in essence, are used for the treatment S IP signaling.Wherein:
P-CSCF is the unified entrance of IMS visited network.The conversation message that the IMS terminal was initiated and ended at all IMS terminals all will pass through P-CSCF.P-CSCF is as a SIP Proxy; Be responsible for subscription authentication and the IPSec management irrelevant with access network; Network anti-attack and safeguard protection; Carry out compression of SIP signaling and decompress(ion) for practicing thrift wireless network resource, the functions such as NAT and QoS of loading end etc. are carried out in user's roaming control through PDF (Policy DecisionFunction).Its major function has: the SIP register requirement that forwarding UE sends is given I-CSCF, and the domain name that is provided by UE determines I-CSCF; The sip message that forwarding UE sends is given S-CSCF, when UE initiates register flow path, confirms S-CSCF by P-CSCF.
I-CSCF is the entrance of IMS home network.In registration process, I-CSCF is through inquiry HSS, for the user selects a S-CSCF.In calling procedure, the calling of going to the IMS network at first is routed to I-CSCF, obtains the S-SCSCF address that the user registers by I-CSCF from HSS, routes messages to S-CSCF.Its major function has: carry out the SIP registration for the user specifies certain S-CSCF; From HSS, obtain the address of S-CSCF, transmit the SIP request; The SIP request that other networks are transmitted is routed to S-CSCF.
S-CSCF is in core status in the control of IMS BlueDrama, it accepts to transmit the register requirement of coming from visited network through P-CSCF, cooperates with HSS and carries out subscription authentication.And from HSS download user business data signed.S-CSCF carries out routing management for user's caller and callee side, according to the initial filter criteria (iFC, Initial Filter Criteria) that the user contracts, carries out SIP AS and triggers, and realizes abundant IMS business function.Its major function has: after receiving register requirement, through HSS register requirement is come into force; Control registered conversational terminal, can be used as Proxy-Server.After receiving request, carry out inter-process or forwarding, also can be used as UA, interrupt or initiation SIP affairs; Carry out alternately multimedia service being provided with business platform.
Network side, it increases the function of group service on the basis of supporting existing capability, i.e. the whole network group calling of storage and management cluster user signing contract information and group service.Network side comprises base station and core net, and wherein core net relates to PDN Gateway, MME and HSS etc.
PDN (Public Data Network, public data network) gateway (PDN-GW), it supports existing capability, and the interface of support and colony application server, to support various group services according to different demands.For group service, PDN-GW can select downlink data to be distributed to SGW or BM-SC according to still group calling of individual calling (common carrying) (each group service group is all distributed a TMGI sign), and promptly selecting unicast mode still is multicast pattern (MBSFN pattern).
HSS (Home Subscriber Server, home signature user server) supports existing capability, increases the module of supporting clustering functionality simultaneously, is used to store the group user profile relevant with group service with management.
MME (Mobility Management Entity; Mobility Management Entity); Support existing capability, increase the module of supporting clustering functionality simultaneously, this newly-increased module of group service of supporting realizes; The relevant information of storage cluster user terminal, the responsible CAMEL-Subscription-Information that obtains the cluster user terminal to HSS etc.MME is the crucial Control Node of 3GPP agreement LTE access network, and it is responsible for the location of the UE of idle pulley, and the call process comprises relaying.It relates to bearer activation/pass closed procedure.And after a UE initialization, for this UE selects to be connected to a SGW (Seving GateWay, gateway).Through with user of HSS interactive authentication, be that a user distributes an interim ID.MME supports within legal limits simultaneously, tackles, monitors.MME provides the control function interface for the 2G/3G access network, and through the S3 interface, UE provides the S6a interface equally towards HSS for roaming.
SGW and eNB all support existing capability according to the LTE standard.
To be that example describes for cluster application server with cluster application server in the present embodiment based on PoC.
In the present embodiment, the source terminal in the group system is through the talking path between base station, core net, IMS territory and application server foundation and the purpose terminal, and its detailed process is:
For source terminal in the group system and purpose terminal; Both all are in idle condition; When source terminal makes a call business to the purpose terminal; Source terminal and base station are carried out the foundation of radio bearer earlier, insert at random and carry out RRC (Radio Resource Control, radio resource control) to connect foundation.Carry, promptly bear loading, in fact the problem that radio bearer is selected is exactly to select the problem of which kind of wireless data service as this segment data path.
RRC handles the 3rd layer of information of control plane between UE and the UTRAN.RRC comprises that mainly RRC connection management process (RRC CONNECTION MANAGEMENT PROCEDURES), radio bearer control (RADIO BEARER CONTROL PROCEDURES), RRC connect mobile process (RRC CONNECTION MOBILITYPROCEDURES) and measuring process (MEASUREMENT PROCEDURES.
RRC connects the foundation etc. that the process of setting up comprises the reselecting of available cell, access permission control and 2 layer signal links.RRC connects release by high level requests, is used to remove last signal and connects; Perhaps in the time of the RRC link failure, initiate by this layer of RRC.If connection failure, UE can require to rebulid RRC and connect.If the RRC connection failure, RRC discharges the resource of having distributed.
After RRC sets up; Source terminal sends initial UE message through the base station to core net, and is mutual with SCSCF and HSS in the IMS territory, accomplishes the safety certification in source terminal and IMS territory; This initial UE message comprises services request, and its service request type is designated point-to-point trunked call.
After the safety certification in IMS territory is accomplished, carry out the negotiation of the NAS security mechanism between the MME in source terminal and the core net.MME carries out the initialization context and sets up process, in eNB, produces EPS and carries and the terminal context, and promptly carry out RB (radio bearer, radio bearer) foundation in the foundation of eating dishes without rice or wine to carry out Radio Resource.
MME is that gateway and PDN-GW upgrade relevant bearer, and wherein information comprises point-to-point bearer types, distinguishes so that PDN-GW uses this information that data are flowed in subsequent process.
Afterwards; After source terminal and Poc server carry out SIP application layer signaling mutual; Then set up SIP session end to end, this moment, the PoC server was initiated the message that floor is permitted to source terminal, sent the message that floor takies to the purpose terminal simultaneously; Can carry out voice calling service then, accomplish talking path foundation between source terminal and the purpose terminal.
After the PoC server is received the speech data of source terminal, then send speech data to PDN-GW, PDN-GW judges the point-to-point type that is carried as at this speech data place, then these data is sent to SGW, the follow-up transmission of then carrying out speech data according to normal flow process.
Step S102 carries out the transmission of speech data through talking path and purpose terminal.
As stated; Source terminal sends speech data through talking path to application server; By application server speech data is forwarded to core net; When core net judge this speech data place be carried as point-to-point type the time, by core net said speech data is forwarded to the base station, by the base station speech data is forwarded to the purpose terminal again.
In like manner, the purpose terminal initiates to insert at random and the RRC connection building process after receiving that MME passes through beep-page message that eNB transmits, and its call flow and the source terminal flow process that makes a call is identical.
As shown in Figure 3, step S101 comprises:
Step S1011, source terminal connects through sending RRC to the base station, and request is set up RRC and is connected;
Step S1012 sends the services request that carries point-to-point trunked call sign to the base station, by the base station services request is forwarded to core net, carries out the safety certification in IMS territory simultaneously;
Step S1013, set up and the base station between radio bearer, and carry out the renewal of beared information through MME, SGW and PDN-GW in the core net;
After the radio bearer between source terminal foundation and the base station; MME sends more the new bearer solicited message and gives SGW in the core net, and this more carries point-to-point trunked call sign in the new bearer solicited message, SGW simultaneously with this more the new bearer solicited message be transmitted to PDN-GW; PDN-GW can judge this calling according to the more new bearer solicited message that receives and be individual calling (common carrying); PDN-GW selects downlink data is distributed to SGW according to individual calling, promptly selects unicast mode.
Step S1014 sends session to application server and sets up request message;
Step S1015 receives application server and sets up the conversation grant message that request message feeds back according to session, the talking path between foundation and the purpose terminal.
Can find out from above-mentioned flow process, for point-to-point call business in the group system, use the existing network framework and the message flow of LTE network, and adopt the IMS+PoC framework, realize the compatibility of trunked call and existing LTE network.
Present embodiment is through on the basis of existing air interface protocol and do not change or the as far as possible little function of carrying out expands that to accomplish point-to-point trunking communication machine-processed as far as possible; Adopt the IMS+PoC framework; And the part network element in the existing network framework is done function expand, specifically set up the talking path between source terminal and the purpose terminal through base station, core net, IMS territory and application server; Carry out the transmission of speech data through talking path and purpose terminal, realize the point-to-point service of group system in the LTE network, the fusion of group system utilized and existing LTE network is more arranged.
As shown in Figure 4, one embodiment of the invention proposes a kind of based on point-to-point calling terminal in the group system of LTE technology, comprising: talking path is set up module 401 and is called out initiation module 402, wherein:
Talking path is set up module 401, is used for through the talking path between base station, core net, IMS territory and application server foundation and the purpose terminal;
The present embodiment method relates to the group system call business based on the LTE network; When a colony terminal in the group system (being that present embodiment is claimed the terminal) another colony terminal in this group system (being that present embodiment is claimed the purpose terminal) when making a call, at first set up module 401 and set up the talking path between terminal and the purpose terminal by talking path.
Call out initiation module 402, be used for carrying out the transmission of speech data through talking path and purpose terminal.
In the present embodiment, the terminal in the group system set up through base station, core net, IMS territory and application server and the purpose terminal between talking path, and be through the detailed process that the transmission of speech data is carried out at talking path and purpose terminal:
Terminal and purpose terminal, both all are in idle condition, and when the terminal made a call business to the purpose terminal, terminal and base station were carried out the foundation of radio bearer earlier, inserted at random and carry out RRC to connect foundation.
After RRC sets up; The terminal is sent initial UE message through the base station to core net, and is mutual with SCSCF and HSS in the IMS territory, accomplishes the safety certification in terminal and IMS territory; This initial UE message comprises services request, and its service request type is designated point-to-point trunked call.
After the safety certification in IMS territory is accomplished, carry out the negotiation of the NAS security mechanism between the MME in terminal and the core net.MME carries out the initialization context and sets up process, in eNB, produces EPS and carries and the terminal context, and promptly carry out RB foundation in the foundation of eating dishes without rice or wine to carry out Radio Resource.
MME is that gateway and PDN-GW upgrade relevant bearer, and wherein information comprises point-to-point bearer types, distinguishes so that PDN-GW uses this information that data are flowed in subsequent process.
Afterwards; After terminal and Poc server carry out SIP application layer signaling mutual; Then set up SIP session end to end, this moment, the PoC server was initiated the message that floor is permitted to the terminal, sent the message that floor takies to the purpose terminal simultaneously; Can carry out voice calling service then, accomplish talking path foundation between terminal and the purpose terminal.
After the PoC server is received the speech data at terminal, then send speech data to PDN-GW, PDN-GW judges the point-to-point type that is carried as at this speech data place, then these data is sent to SGW, the follow-up transmission of then carrying out speech data according to normal flow process.
As shown in Figure 5, talking path is set up module 401 and comprised, and: RRC connects and to set up unit 4011, services request transmitting element 4012, radio bearer and set up updating block 4013, conversation request message transmitting element 4014 and talking path and set up unit 4015, wherein:
Services request transmitting element 4012 is used for sending the services request that carries point-to-point trunked call sign to the base station, by the base station said services request is forwarded to core net, carries out the safety certification in IMS territory simultaneously;
Radio bearer is set up updating block 4013, be used to set up and the base station between radio bearer, and carry out the renewal of beared information through MME, SGW and PDN-GW in the core net;
Conversation request message transmitting element 4014 is used for sending session to application server and sets up request message;
Talking path is set up unit 4015, is used to receive application server and sets up the conversation grant message that request message feeds back according to said session, the talking path between foundation and the purpose terminal.
Further; Calling out initiation module 402 also is used for sending speech data through talking path to application server; By application server speech data is forwarded to core net; The point-to-point type that is carried as when this speech data place of core net judgement is forwarded to the base station by core net with speech data, by the base station speech data is forwarded to the purpose terminal again.
As shown in Figure 6; One embodiment of the invention proposes a kind of based on point-to-point calling system in the group system of LTE technology; Comprise: the source terminal 602 that is connected with base station 601 respectively and purpose terminal 603, the application server 604 that is connected through core net with base station 601, wherein:
Source terminal 602 is used for through the talking path between base station 601, core net, IMS territory and application server 604 foundation and the purpose terminal 603; Carry out the transmission of speech data through talking path and purpose terminal 603;
Application server 604, being used for through base station 601 core net and IMS territory is that source terminal 602 is set up the talking path between this source terminal 602 and the purpose terminal 603, so that source terminal 602 carries out the transmission of speech data according to talking path and purpose terminal 603;
Purpose terminal 603 is used for the speech data that sends through talking path reception sources terminal 602.
Further, source terminal 602 also is used for setting up RRC and connecting through sending the RRC connection request to base station 601; Send the services request that carries point-to-point trunked call sign to base station 601, services request is forwarded to core net, carry out the safety certification in IMS territory simultaneously by base station 601; Set up and base station 601 between radio bearer, and carry out the renewal of beared information through MME, SGW and PDN-GW in the core net; Send session to application server 604 and set up request message; Receive application server 604 and set up the conversation grant message that request message feeds back, the talking path between foundation and the purpose terminal 603 according to session;
Application server 604, request message is set up in the session that also is used for sending at reception sources terminal 602, and sets up request message feedback conversation grant message to source terminal 602 according to session.
Further, source terminal 602 also is used for sending speech data through talking path to application server 604;
Application server 604; Also be used for speech data is forwarded to core net; When core net judge this speech data place be carried as point-to-point type the time, by core net speech data is forwarded to base station 601, by base station 601 speech data is forwarded to purpose terminal 603 again.
In the present embodiment, application server 604 is the cluster application server based on PoC.In like manner; Application server 604 can also be for based on the cluster application server of Gota and the cluster application server of other types in the present embodiment; When the cluster application server that uses based on the cluster application server of Gota and other types, owing to the cluster application server based on Gota includes the IMS function and need not pass through the IMS territory.
The embodiment of the invention is based on point-to-point method of calling, terminal and system in the group system of LTE technology; Through on the basis of existing air interface protocol and do not change or the as far as possible little function of carrying out expands that to accomplish point-to-point trunking communication machine-processed as far as possible; Adopt the IMS+PoC framework; And the part network element in the existing network framework is done function expand, specifically set up the talking path between source terminal and the purpose terminal through base station, core net, IMS territory and application server; Carry out the transmission of speech data through talking path and purpose terminal, realize the point-to-point service of group system in the LTE network, the compatibility and the fusion of group system utilized and existing LTE network are more arranged.
The above is merely the preferred embodiments of the present invention; Be not so limit claim of the present invention; Every equivalent structure or flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical field, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. one kind based on point-to-point method of calling in the group system of Long Term Evolution LTE technology, it is characterized in that, comprising:
Source terminal is through the talking path between base station, core net, IMS territory and application server foundation and the purpose terminal;
Carry out the transmission of speech data through said talking path and said purpose terminal.
2. method according to claim 1 is characterized in that, said source terminal comprises through the step of the talking path between base station, core net, IMS territory and application server foundation and the purpose terminal:
Source terminal is set up RRC and is connected through send radio resource control RRC connection request to the base station;
Send the services request that carries point-to-point trunked call sign to the base station, said services request is forwarded to core net, carry out the safety certification in IMS territory simultaneously by the base station;
Set up and the base station between radio bearer, and carry out the renewal of beared information through MME, SGW and PDN-GW in the core net;
Send session to application server and set up request message;
Receive application server and set up the conversation grant message that request message feeds back, the talking path between foundation and the purpose terminal according to said session.
3. method according to claim 2 is characterized in that, said step of carrying out the transmission of speech data through talking path and said purpose terminal comprises:
Source terminal sends speech data through said talking path to said application server; By application server said speech data is forwarded to core net; When core net judge this speech data place be carried as point-to-point type the time; By core net said speech data is forwarded to the base station, by the base station said speech data is forwarded to the purpose terminal again.
4. one kind based on point-to-point calling terminal in the group system of LTE technology, it is characterized in that, comprising:
Talking path is set up module, is used for through the talking path between base station, core net, IMS territory and application server foundation and the purpose terminal;
Call out initiation module, be used for carrying out the transmission of speech data through said talking path and said purpose terminal.
5. terminal according to claim 4 is characterized in that, said talking path is set up module and comprised:
The unit is set up in the RRC connection, is used for setting up RRC and connecting through sending the RRC connection request to the base station;
The services request transmitting element is used for sending the services request that carries point-to-point trunked call sign to the base station, by the base station said services request is forwarded to core net, carries out the safety certification in IMS territory simultaneously;
Radio bearer is set up updating block, be used to set up and the base station between radio bearer, and carry out the renewal of beared information through MME, SGW and PDN-GW in the core net;
The conversation request message transmitting element is used for sending session to application server and sets up request message;
Talking path is set up the unit, is used to receive application server and sets up the conversation grant message that request message feeds back according to said session, the talking path between foundation and the purpose terminal.
6. according to claim 4 or 5 described terminals; It is characterized in that; Said calling initiation module also is used for sending speech data through said talking path to said application server, by application server said speech data is forwarded to core net, when core net judge this speech data place be carried as point-to-point type the time; By core net said speech data is forwarded to the base station, by the base station said speech data is forwarded to the purpose terminal again.
7. one kind based on point-to-point calling system in the group system of LTE technology, it is characterized in that, comprising: the source terminal that is connected with the base station respectively and purpose terminal, the application server that is connected through core net with the base station, wherein:
Said source terminal is used for through the talking path between base station, core net, IMS territory and application server foundation and the purpose terminal; Carry out the transmission of speech data through said talking path and said purpose terminal;
Said application server, being used for through base station, core net and IMS territory is that said source terminal is set up the talking path between this source terminal and the purpose terminal, so that source terminal carries out the transmission of speech data according to said talking path and said purpose terminal;
Said purpose terminal is used for receiving the speech data that said source terminal sends through said talking path.
8. system according to claim 7 is characterized in that,
Said source terminal also is used for setting up RRC and connecting through sending the RRC connection request to the base station; Send the services request that carries point-to-point trunked call sign to the base station, said services request is forwarded to core net, carry out the safety certification in IMS territory simultaneously by the base station; Set up and the base station between radio bearer, and carry out the renewal of beared information through MME, SGW and PDN-GW in the core net; Send session to application server and set up request message; Receive application server and set up the conversation grant message that request message feeds back, the talking path between foundation and the purpose terminal according to said session;
Said application server, request message is set up in the session that also is used for sending at the reception sources terminal, and sets up request message feedback conversation grant message to source terminal according to said session.
9. according to claim 7 or 8 described systems, it is characterized in that,
Said source terminal also is used for sending speech data through said talking path to said application server;
Said application server; Also be used for said speech data is forwarded to core net; When core net judge this speech data place be carried as point-to-point type the time, by core net said speech data is forwarded to the base station, by the base station said speech data is forwarded to the purpose terminal again.
10. system according to claim 9 is characterized in that, said application server is the cluster application server based on Push to talk over Cellular PoC.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105129167A CN102457813A (en) | 2010-10-20 | 2010-10-20 | Point-to-point calling method in cluster system based on LTE technology, terminal thereof and system thereof |
| PCT/CN2011/075107 WO2012051857A1 (en) | 2010-10-20 | 2011-06-01 | Method, user equipment and system for point-to-point call in trunking system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105129167A CN102457813A (en) | 2010-10-20 | 2010-10-20 | Point-to-point calling method in cluster system based on LTE technology, terminal thereof and system thereof |
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| CN102457813A true CN102457813A (en) | 2012-05-16 |
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