CN102843655B - A kind of method realizing organizing interior wideband multimedia cluster service and transmit in real time - Google Patents
A kind of method realizing organizing interior wideband multimedia cluster service and transmit in real time Download PDFInfo
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Abstract
The invention provides a kind of method realizing organizing interior wideband multimedia cluster service and transmit in real time, comprising: business sends user terminal and sends wideband multimedia cluster service request to multimedia cluster scheduler subsystem; Multimedia cluster scheduler subsystem, according to described wideband multimedia cluster service request, sends subscriber terminal authority to business, and after authentication is passed through, informing network subsystem initiates wideband multimedia cluster service process of establishing; Network subsystem initiates IP-CAN session modification process according to described notice, perform the cluster loading establishing process of network subsystem side, and indicate broadband wireless access subsystem concurrently for business sends user terminal distribution ascending wireless resource, share Radio Resource for business receives user terminal allocation of downlink, complete the process of establishing of cluster carrying; To described multimedia cluster scheduler subsystem, network subsystem confirms that wideband multimedia cluster service has been set up, multimedia cluster scheduler subsystem sends user terminal to business and confirms that wideband multimedia cluster service has been set up.The present invention is applicable to wideband digital trunked communication system.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of method transmitted in real time based on wideband multimedia cluster service in group in the wideband digital trunked communication system of time-division Long Term Evolution (TD-LTE, TimeDivisionDuplex-LongTermEvolution) technology.
Background technology
Owing to possessing the characteristics such as distinctive commander, scheduling and short calling, trunked communication system is in public safety, communications and transportation, emergency communication and command scheduling is required to higher enterprise has a wide range of applications in producing.At present, international, domestic most popular trunked communication system is the narrow-band digital trunked communication system realized based on Generation Mobile Telecommunication System technology, mainly contain: European Telecommunications ANSI (EuropeanTelecommunicationsStandardsInstitute, what ETSI) define accesses (TimeDivisionMultipleAccess based on time division multiplexing, TDMA) TErrestrial TRunked Radio (TerrestrialTrunkedRadio of technology, TETRA) system, integrated digital enhanced networks (the IntegratedDigitalEnhancedNetworks based on TDMA technology of MOTOROLA company, iDEN) system, and it is domestic based on code division multiplexing access (CodeDivisionMultipleAccess, CDMA) open cluster architecture (GlobalopenTrunkingarchitecture of technology, GoTa) system and based on global system for mobile communications (GlobalSystemforMobilecommunication, GSM) 800MHz digital clustering communication system (GT800) system etc. based on GSM of technology.Above digital clustering communication system has a common feature, based on half-duplex voice communications, only provides limited low-speed data service.
Along with the quickening of social informatization process and the flourish of broadband wireless communication technique, make cluster industry user no longer be satisfied with single half-duplex voice call business, but need the wideband multimedia cluster service integrating voice, data, image and video.Wideband multimedia cluster service makes tradesman utilize trunked communication system to carry out in the process of command scheduling, can not only " listen and obtain ", can also " visible ", many specific demands of commander, scheduling can be met, especially under the special screne such as accident or disaster, the real-time transmission of wideband multimedia cluster service not only contributes to tradesman and intuitively, all sidedly understands field condition, is more conducive to carrying out of rescue work.
Existing narrow-band digital trunked communication system, due to the restriction by factors such as bandwidth sum message transmission rates, the colony dispatching service provided is only limitted to the audio call of group and the low-speed data service of some complementarities, can not carry out the real-time transmission of wideband multimedia cluster service.
The method for real-time transmitting of wideband multimedia cluster service in a kind of group being applicable to wideband digital trunked communication system is not yet proposed at present.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method realizing organizing interior wideband multimedia cluster service and transmit in real time, and the method is applicable to wideband digital trunked communication system.
In order to achieve the above object, the technical scheme that the present invention proposes is:
A kind of method realizing organizing interior wideband multimedia cluster service and transmit in real time, the method is applied in wideband digital trunked communication system, this system comprises terminal and network side, terminal comprises user terminal and dispatching desk, network side comprises network subsystem, multimedia cluster scheduler subsystem and broadband wireless access subsystem,, it is characterized in that, the method comprises the following steps:
A, business send user terminal and send wideband multimedia cluster service request to described multimedia cluster scheduler subsystem;
B, described multimedia cluster scheduler subsystem, according to described wideband multimedia cluster service request, send subscriber terminal authority to described business, and after authentication is passed through, informing network subsystem initiates wideband multimedia cluster service process of establishing;
C, described network subsystem initiate IP-CAN session modification process according to described notice, perform the cluster loading establishing process of network subsystem side, instruction broadband wireless access subsystem distributes ascending wireless resource for business sends user terminal and completes corresponding cluster loading establishing process concurrently, and shares Radio Resource for business receives user terminal allocation of downlink and complete corresponding cluster loading establishing process simultaneously;
To described multimedia cluster scheduler subsystem, d, described network subsystem confirm that wideband multimedia cluster service has been set up, multimedia cluster scheduler subsystem sends user terminal to business and confirms that wideband multimedia cluster service has been set up.
In sum, in the method that in the realization group that the present invention proposes, wideband multimedia cluster service transmits in real time, network subsystem is initiated in the process of wideband multimedia cluster service foundation according to the instruction of multimedia cluster scheduler subsystem, also can initiate IP-Can session modification process, so that the CAMEL-Subscription-Information according to type of service and group generates dynamic PCC rule, and according to PCC rule, cluster carrying is set up in initiation, for transmitting broadband multimedia services data, thus meet wideband multimedia cluster service to bandwidth, speed, the requirement of time delay and real-time, ensure the real-time transmission of wideband multimedia cluster service.In addition, the process employs the mode of parallel processing signaling message, system in parallel ground sends user terminal for business and business receives user terminal Resources allocation, sets up cluster carrying, substantially reduce the settling time of business, meet the characteristic of trunked communication system rapid command scheduling.The present invention inherits the plurality of advantages such as TD-LTE two-forty and large bandwidth, is applicable to wideband digital trunked communication system.
Accompanying drawing explanation
Fig. 1 is the network architecture schematic diagram based on the wideband digital trunked communication system of TD-LTE technology in the present invention;
Fig. 2 is the schematic flow sheet of the embodiment of the present invention one;
Fig. 3 is the method schematic diagram that in group, wideband multimedia cluster service transmits in real time;
Fig. 4 is the IP-Can session modification process that P-GW initiates.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
The present invention proposes a kind of method realizing organizing interior wideband multimedia cluster service and transmit in real time, and the method realizes in based on the wideband digital trunked communication system of TD-LTE.TD-LTE technology is the model that mobile communication and broadband wireless access are merged, and is also one of mainstream standard of Future broadband mobile communication.Compared with existing trunked communication system, the wideband digital trunked communication system based on TD-LTE technology has larger channel capacity, the higher availability of frequency spectrum, stronger antijamming capability and better transmission performance.
In order to more clearly be described wideband multimedia cluster service method for real-time transmitting in of the present invention group, first to the method based on wideband digital trunked communication system structure set forth.Fig. 1 is the network architecture schematic diagram of the wideband digital trunked communication system based on TD-LTE technology.As shown in Figure 1, comprising: terminal, broadband wireless access subsystem, network subsystem, multimedia cluster scheduler subsystem and operation and maintenance sub system five chief components.
1, terminal
Terminal is connected with broadband wireless access subsystem or multimedia cluster scheduler subsystem, for cluster user provides voice group service, wideband multimedia cluster service and various scheduling feature by air interface or wired connection.Described terminal comprises user terminal and dispatching desk, and further, described user terminal comprises handheld terminal, Vehicle mounted station and fixed station etc., and described dispatching desk comprises wired dispatching desk and wireless dispatching desk.
2, broadband wireless access subsystem
Broadband wireless access subsystem is made up of base station (eNodeB).This eNodeB adds wireless colony scheduling feature (RTDF) module on the basis of the original base station of TD-LTE system, be responsible for the relevant treatment of group service, comprise from MME receive clustered control signaling, for terminal distribution Radio Resource (as, Radio Resource is shared for belonging to business receiving terminal allocation of downlink in the group in same community), and the business data flow received from S-GW is copied and is sent to business receiving terminal etc. by descending shared Radio Resource.In addition, eNodeB also supports fail soft function, for eNodeB and network subsystem out of touch time, process the segment set group business of user in this base station range.
3, network subsystem
Network subsystem is primarily of equipment compositions such as Mobility Management Entity (MME), gateway (S-GW), grouped data network gateway (P-GW), home subscriber server (HSS) and "Policy and Charging Rules Function entities (PCRF).
The chain of command functions such as the main completing user mobile management of MME, Internet resources control, comprise the security mechanism such as associated authentication and key agreement between network and user, the mobile management of user terminal, the foundation of sessions carry, the resource management such as amendment and release.S-GW is the terminal of the packet data interface connecting broadband wireless access subsystem, the route of primary responsibility packet and forwarding.
The mapping of the main finishing service data flow of P-GW, copy and distribute, initiating the foundation of service bearer according to the business characteristic of user's request and QoS demand; In addition, P-GW is also connected with multimedia cluster dispatch server (MTDS), and the cluster between responsible transmission with MTDS is by business data flow.
HSS is the Database Systems being in charge of user, comprises subscriber information management, location information management, and user security information management; Need in HSS to increase cluster user server, for storage cluster user profile, the group user profile relevant to group service and authentication arithmetic and encryption key etc., also open an account for network equipment provides cluster user/nullify simultaneously, the foundation of group service authentication/mandate and charging.
PCRF is connected to HSS, P-GW and MTDS, according to Client-initiated type of service, asks predefined PCC rule; Or provide dynamic qos policy control decision for the specific group service of cluster user for MTDS, ensure that mapping and the process of user face data are carried out in the requirement of contracting according to user.
4, multimedia cluster scheduler subsystem
Multimedia cluster scheduler subsystem is made up of multimedia cluster dispatch server (MTDS), recording/recording service device, application server and various interconnection gateway equipment.
Wherein, MTDS builds based on SIPServer, it is the control centre of group service scheduling, complete unified session control and the scheduling of resource of voice scheduling, data dispatch and video dispatching, comprise foundation, safeguard and discharge various group service session (as, group calling/visual group calling, individual calling/visual group calling, video monitoring etc.), carry out right of speech management and scheduling.In addition, MTDS is also responsible for the distribution function of user management and business data flow, and provides the signaling between wired dispatching desk and group system and data channel.Recording/recording service device is for completing storage and the inquiry of voice in group system, data and video.Application server comprises the various application servers such as voice server, data server, video server, image intelligent Analysis server, for cluster user provides various sector application.Interconnection gateway can realize and PSTN, the interconnecting of cellular mobile communications networks (as GSM/TD-SCDMA/LTE etc.) and other group system (as TETRA/Gota/GT800 etc.).
5, operation and maintenance sub system
Operation and maintenance sub system provides the maintenance interface to the network equipment, collects, the operation information of monitoring network and situation, and can according to the requirement generation system operational report of industry user, for the network planning and adjustment provide foundation.According to delineation of activities, operation and maintenance sub system comprises five functional parts: safety management, configuration management, fault management, performance management and other management.For supporting VPN function, the user management terminal that operation and maintenance sub system should provide Special Interest Group user to use, to realize the management function to user in Special Interest Group.
Below in conjunction with said system structure, the embodiment of the present invention one is described.Fig. 2 is the schematic flow sheet of the embodiment of the present invention one, and as shown in Figure 2, this embodiment mainly comprises the following steps:
Step 201, business send user terminal and send wideband multimedia cluster service request to described multimedia cluster scheduler subsystem.
Particularly, in this step, business sends user terminal and determines whether self is in connection status, if so, then directly sends sip message request wideband multimedia cluster service by default bearer to MTDS; If not, then first initiate service request (ServiceRequest) process, set up radio bearer and the S1 carrying of default bearer, then send sip message request wideband multimedia cluster service by default bearer to MTDS.Service request procedure is the standard signaling procedure of TD-LTE system, repeats no more herein.
Step 202, described multimedia cluster scheduler subsystem, according to described wideband multimedia cluster service request, send subscriber terminal authority to described business, and after authentication is passed through, informing network subsystem initiates wideband multimedia cluster service process of establishing.
After MTDS receives the wideband multimedia cluster service request of business transmission user terminal, if do not have business to send the cluster CAMEL-Subscription-Information of user terminal, then MTDS and HSS is mutual, requested service sends the authentication information of user, and authentication is carried out to business transmission user terminal, whether authentication content comprises having permission initiates wideband multimedia cluster service etc.If authentication is not passed through, then MTDS refuses the service request that business sends user terminal, process ends; If authentication is passed through, and have employed dynamic PCC rule, then MTDS sends application/business information to PCRF, and PCRF preserves application/business information, and returns acknowledge message to MTDS.
If MTDS does not collect group information, then MTDS is to HSS request collection group information, comprises the list of group Subscriber Number, group priority, multicast address, voice/data/video port numbers etc.Subsequently, MTDS sends wideband multimedia cluster service to each MME and sets up Indication message, initiates the process of establishing of this group service.
Step 203, described network subsystem initiate IP-CAN session modification process according to described notice, perform the cluster loading establishing process of network subsystem side, instruction broadband wireless access subsystem distributes ascending wireless resource for business sends user terminal and completes corresponding cluster loading establishing process concurrently, and shares Radio Resource for business receives user terminal allocation of downlink and complete corresponding cluster loading establishing process simultaneously.
Here, initiate IP-CAN session modification process, the cluster loading establishing process performing network subsystem side specifically comprises: MME creates cluster to S-GW instruction and carries, and in instruction, carry the information such as eNodeB list after receiving the wideband multimedia cluster service foundation instruction of MTDS transmission; S-GW forwards to P-GW and creates cluster carrying instruction; P-GW initiates IP-Can session modification process, and in this process, dynamic PCC rule is sent to P-GW by PCRF, and P-GW according to PCC regular allocation carrying level qos parameter, and initiates to create cluster carrying, for transmitting wideband multimedia cluster service data flow; P-GW distributes P-GWS5/S8-TEID, and request S-GW creates cluster carrying, and in the request P-GWS5/S8-TEID is sent to S-GW; S-GW distributes corresponding S-GWS5/S8-TEID and sets up the mapping with P-GWS5/S8-TEID, corresponding S-GWS1-TEID is distributed for each eNodeB in eNodeB list, request MME creates cluster carrying, and in the request S-GWS1-TEID is sent to MME.
In this step, cluster context is set up in the eNodeB request that MME sends user terminal place to business; The eNodeB that business sends user terminal place is after business transmission user terminal distributes ascending wireless resource, sends user terminal initiation RRC and connects reconfiguration course, ascending wireless resource description and relevant configuration information are sent to business transmitting terminal to business; Business sends user terminal according to each layer parameter of the information configuration received self, and returns to the eNodeB at place the foundation that response message completes radio bearer; Simultaneously, the eNodeB that business sends user terminal place is that the business reception user terminal allocation of downlink belonging to same community shares Radio Resource, and in the community that it comprises, broadcast clustered paging message and wideband multimedia cluster service sets up message, informing business receives user terminal and sets up wideband multimedia cluster service;
The eNodeB that business sends user terminal place returns the cluster context foundation response of carrying eNodeBS1-TEID to MME; After the response message that the eNodeB that MME receives business transmission user terminal place sends and business send the activation cluster bearer context response of user terminal transmission, return establishment cluster carrying response to S-GW, and described eNodeBS1-TEID is sent to S-GW; S-GW records the mapping relations of described eNodeBS1-TEID and S-GWS1-TEID, and the S-GWS5/S8TEID distributed before this is sent to P-GW by response message, completes the foundation of cluster carrying;
After cluster carrying is set up, the eNodeB that MME sends user terminal place to business sends information prompting; Business sends eNodeB broadcast message prompting in the community that it comprises at user terminal place.
Concurrently, MME indicates other eNodeB in eNodeB list except the eNodeB that business sends user terminal place to be that the business reception user terminal allocation of downlink belonging to same community shares Radio Resource, and in the community that it comprises, broadcast clustered paging message and wideband multimedia cluster service sets up message, informing business receives user terminal and sets up wideband multimedia cluster service;
Other eNodeB in eNodeB list except the eNodeB that business sends user terminal place returns to MME the cluster context carrying eNodeBS1-TEID and sets up response; MME receives the response message from each eNodeB, and completes the foundation of cluster carrying; Subsequently, MME sends information prompting to the eNodeB returning acknowledge message, notifies this eNodeB broadcast message prompting in the community that it comprises.
To described multimedia cluster scheduler subsystem, step 204, described network subsystem confirm that wideband multimedia cluster service has been set up, multimedia cluster scheduler subsystem sends user terminal to business and confirms that wideband multimedia cluster service has been set up.
MME notifies that MTDS wideband multimedia cluster service has been set up; MTDS sends user terminal by default bearer to business and sends sip message, and informing business sends user terminal wideband multimedia cluster service and is successfully established, and determines that business sends user terminal and can send wideband multimedia cluster service data flow simultaneously; Business sends user terminal and confirms to MTDS transmission sip message.
So far, wideband multimedia cluster service has been set up.Follow-up, can enter normal wideband multimedia cluster service and send or receiving course, business sends user terminal by eNodeB, S-GW and P-GW, and Business Stream is sent to MTDS; Then, Business Stream carries out mapping and copying by MTDS, and is distributed to P-GW, S-GW that business receives user terminal place; , Business Stream is sent to each eNodeB in eNodeB list by S-GW; Finally, each eNodeB receives user terminal broadcast broadband multimedia cluster business datum to business in the community at its place.
Below by concrete example by reference to the accompanying drawings 3, the method that wideband multimedia cluster service in realization group transmits in real time is described in further detail.
Fig. 3 is the method schematic diagram that in the inventive method embodiment TD-LTE wideband digital trunking communication system realizing group, wideband multimedia cluster service transmits in real time.As shown in Figure 3, UE1 is that business sends user terminal, and UE2 is that a business in group receives user terminal.The idiographic flow of the method comprises the steps:
If when wideband multimedia cluster service is initiated in step 1 ~ 2, business sends user terminal and is in connection status, then when business transmission user presses business send key, directly by default bearer, SIP (INVITE) message is sent to MTDS, wideband multimedia cluster service is set up in request; If when initiating wideband multimedia cluster service, business sends user terminal and is in idle condition, then when business transmission user presses business send key, need first to initiate service request (ServiceRequest) process, set up radio bearer and the S1 carrying of default bearer, business sends user terminal and sends SIP (INVITE) message to MTDS by default bearer subsequently; The information such as business of carrying in sip message sends Subscriber Number, business sends User Priority, sets of numbers, urgent mark, type of service.Service request procedure is the standard signaling procedure of TD-LTE mobile communication system, repeats no more herein.
After step 3 ~ 6, MTDS receive wideband multimedia cluster service foundation request, subscriber terminal authority is sent to business.
If MTDS does not have business to send the cluster CAMEL-Subscription-Information of user terminal, then MTDS and HSS is mutual, and requested service sends the authentication information of user, sends user carry out authentication to business, and whether authentication content comprises has the right to initiate wideband multimedia cluster service etc.If authentication is not passed through, then MTDS sends user terminal to business and returns SIP (BYE) message with Reason For Denial, and this time wideband multimedia cluster service process of establishing terminates; If authentication is passed through, and have employed dynamic PCC rule, then MTDS sends application/business information to PCRF, and PCRF preserves application/business information, and returns acknowledge message to MTDS.
If step 7 MTDS does not collect group information, then MTDS is to HSS request collection group information, comprises Subscriber Number list in group, group priority, multicast address, voice/data/video port numbers etc.
Step 8, MTDS send wideband multimedia cluster service to MME and set up Indication message, comprise business and send Subscriber Number, sets of numbers, multicast address, voice/data/video port numbers, address, MTDS user face, information instruction etc.
Step 9 ~ 11, MME indicate P-GW to initiate to create cluster load bearing process.
MME sends to S-GW and creates cluster carrying Indication message, for this wideband multimedia cluster service sets up cluster carrying, carries the information such as eNodeB list, MME chain of command TEID in message; S-GW forwards to P-GW and creates cluster carrying Indication message;
If have employed dynamic PCC rule, then, after P-GW receives and creates collection cluster carrying Indication message, IP-Can session modification process can be initiated, the IP-Can session modification process that detailed process is shown in Figure 4.In this process, PCRF sends type of service and the collection group information of user terminal requests according to business, generates dynamic PCC rule and is handed down to P-GW; P-GW initiates to create cluster load bearing process;
P-GW sends to S-GW and creates cluster bearing request message, carries the P-GWS5/S8-TEID that P-GW distributes; S-GW distributes corresponding S-GWS5/S8-TEID and sets up the mapping with P-GWS5/S8-TEID, distributes corresponding S-GWS1-TEID for each eNodeB in eNodeB list, sends to MME by creating cluster bearing request message.
The eNodeB that step 12a ~ 18a, MME indicating services sends user terminal place is that business sends user terminal distribution ascending wireless resource, set up radio bearer, share Radio Resource for the business belonging to same community receives user terminal allocation of downlink, and broadcast clustered paging message and wideband multimedia cluster service sets up message.
MME sends the eNodeB signalling of bouquet context at user terminal place to business and sets up request message, comprises to activate cluster bearer context request message and wideband multimedia cluster service sets up message;
The eNodeB that business sends user terminal place revises the RRC connection of having set up to business transmission user terminal transmission RRC connection reconfiguration message, complete the foundation of radio bearer, comprise ascending wireless resource in this message and describe and other relevant configuration information; After business transmission user terminal configures each layer according to the instruction of eNodeB, RRC connection can be sent to eNodeB and reshuffle message, confirm that radio bearer has been set up;
ENodeB allocation of downlink in the community that it comprises that business sends user terminal place shares Radio Resource, and broadcast clustered paging message and wideband multimedia cluster service sets up message, informing business receives signaling plane passage and the service surface passage that user terminal sets up wideband multimedia cluster service;
The eNodeB that business sends user terminal place sets up response message to MME signalling of bouquet context, comprises the eNodeBS1-TEID that eNodeB distributes in this message;
Business sends user terminal and sends up NAS message transfer by the eNodeB at its place to MME, comprises and activates cluster bearer context response message.
Step 19a ~ 20a, MME sends to S-GW and creates cluster bearing response message, carries eNodeBS1-TEID in message; S-GW records the mapping relations of described eNodeBS1-TEID and S-GWS1-TEID, sends and creates cluster bearing response message, wherein carry step 11 and distribute and the S-GWS5/S8TEID mapped, complete the foundation of cluster carrying to P-GW.
The eNodeB that step 21a ~ 22a, MME sends user terminal place to business sends information prompting message; Business sends eNodeB broadcast message prompting in each community that it comprises at user terminal place, and informing business reception user terminal now business transmitting terminal initiates wideband multimedia cluster service.
Step 12b ~ 15b, with step 12a concurrently, MME indicates other eNodeB allocation of downlink sending user terminal place eNodeB except business in eNodeB list to share Radio Resource, and broadcasts clustered paging message and wideband multimedia cluster service sets up message.
MME sets up request message to other eNodeB signalling of bouquet context in eNodeB list, comprise wideband multimedia cluster service and set up message, indicate each eNodeB allocation of downlink in the community that it comprises to share Radio Resource, in message, carry the parameter such as sets of numbers, group priority, S-GWS1-TEID, multicast address;
After eNodeB completes descending shared allocation of radio resources, meeting broadcast clustered paging message in each community that it comprises and wideband multimedia cluster service sets up message, and informing business receives signaling plane passage and the service surface passage that user terminal sets up wideband multimedia cluster service;
Each eNodeB at business reception user terminal place returns cluster context to MME and sets up response message, comprises the eNodeBS1-TEID that each eNodeB distributes in message.
Step 16b ~ 17b, MME sends to S-GW and creates cluster bearing response message, carries eNodeBS1-TEID in message; S-GW records the mapping relations of described eNodeBS1-TEID and S-GWS1-TEID, sends and creates cluster bearing response message, carry the S-GWS5/S8TEID that step 11 is distributed and mapped, complete the foundation of cluster carrying to P-GW.
Response message set up in the cluster context of the eNodeB transmission that step 18b ~ 19b, MME receives in eNodeB list except business receives user terminal place eNodeB, and after completing the foundation of cluster carrying, MME indicates these eNodeB broadcast message prompting message in the community that it comprises immediately, and informing business receives user terminal now for business transmitting terminal initiates wideband multimedia cluster service.
Step 23, MME send wideband multimedia cluster service to MTDS and set up acknowledge message, and notice MTDS wideband multimedia cluster service has been set up.
Step 24 ~ 25, MTDS send user terminal by default bearer to business and send SIP (200OK) message, informing business sends user terminal wideband multimedia cluster service and is successfully established, and determines that business sends user terminal and can send wideband multimedia cluster service data flow simultaneously; Business transmission user terminal sends SIP (ACK) message to MTDS and confirms.
After wideband multimedia cluster service has been set up, in group, user has entered wideband multimedia cluster service transmission or accepting state.ENodeB, S-GW, P-GW that upstream data sends user terminal place by business are sent to MTDS, MTDS copies data stream and distributes, be sent to each eNodeB in eNodeB list by P-GW, the S-GW at business reception user terminal place, in the community at its place, receive user terminal broadcast broadband multimedia cluster business datum to business by each eNodeB.
Message is set up for clustered paging message and wideband multimedia cluster service, adopt periodic broadcast mode, for not start shooting in group or not the user of dispatch area, when its start or when entering dispatch area, the mode that can enter by lagging joins in ongoing wideband multimedia cluster service.
Fig. 4 is the IP-Can session modification process schematic that in the embodiment of the present invention, P-GW initiates.As shown in Figure 4, specifically comprise the following steps:
Step 1, P-GW send IP-Can session modification Indication message to PCRF, the PCC rule needed for request;
If step 2 ~ 3 PCRF does not have the application/business information of this session, then PCRF asks the application/service related information of this service conversation to MTDS;
If step 4 ~ 5 PCRF does not collect group information, then PCRF is to HSS request collection group information;
Step 6, PCRF formulate dynamic PCC rule according to application/business information and collection group information;
Step 7, PCRF send to P-GW and confirm IP-Can session modification message, carry PCC rule;
Step 8, P-GW return tactful acknowledge message to PCRF.
Can be found out by technique scheme, TD-LTE wideband digital trunked communication system of the present invention adopts new generation broadband mobile communication technology TD-LTE, inherit the plurality of advantages such as TD-LTE two-forty and large bandwidth, compared with existing digital clustering communication system, there is larger channel capacity, the higher availability of frequency spectrum, stronger antijamming capability and better transmission performance.
In the method that in realization group of the present invention, wideband multimedia cluster service transmits in real time, network subsystem is initiated in the process of wideband multimedia cluster service foundation according to the instruction of multimedia cluster scheduler subsystem, also can initiate IP-Can session modification process, CAMEL-Subscription-Information according to type of service and group generates dynamic PCC rule, and according to PCC rule, cluster carrying is set up in initiation, for transmitting broadband multimedia services data, thus meet wideband multimedia cluster service to bandwidth, speed, the requirement of time delay and real-time, ensure the real-time transmission of wideband multimedia cluster service.
In addition, have employed the mode of parallel processing signaling message in said method, system in parallel ground sends user terminal for business and business receives user terminal Resources allocation, sets up cluster carrying, substantially reduce the settling time of business, meet the characteristic of trunked communication system rapid command scheduling.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the method realizing organizing interior wideband multimedia cluster service and transmit in real time, the method is applied in wideband digital trunked communication system, this system comprises terminal and network side, terminal comprises user terminal and dispatching desk, network side comprises network subsystem, multimedia cluster scheduler subsystem and broadband wireless access subsystem, it is characterized in that, the method comprises the following steps:
A, business send user terminal and send wideband multimedia cluster service request to described multimedia cluster scheduler subsystem;
B, described multimedia cluster scheduler subsystem, according to described wideband multimedia cluster service request, send subscriber terminal authority to described business, and after authentication is passed through, informing network subsystem initiates wideband multimedia cluster service process of establishing;
C, described network subsystem initiate IP-Can session modification process according to described notice, perform the cluster loading establishing process of network subsystem side, instruction broadband wireless access subsystem: distribute ascending wireless resource for business sends user terminal and complete corresponding cluster loading establishing process, and share Radio Resource for business receives user terminal allocation of downlink and complete corresponding cluster loading establishing process simultaneously;
To described multimedia cluster scheduler subsystem, d, described network subsystem confirm that wideband multimedia cluster service has been set up, multimedia cluster scheduler subsystem sends user terminal to business and confirms that wideband multimedia cluster service has been set up;
Wherein, described step b comprises,
Multimedia cluster dispatch server MTDS in multimedia cluster scheduler subsystem is according to described wideband multimedia cluster service request, subscriber terminal authority is sent to described business, the content of described authentication comprises whether having permission initiation wideband multimedia cluster service, if described authentication is not passed through, then described MTDS refuses the service request that business sends user terminal, process ends; If described authentication is passed through, then described MTDS sends wideband multimedia cluster service to the relevant MME in described network subsystem and sets up instruction, initiates described wideband multimedia cluster service process of establishing;
Network subsystem described in step c initiates IP-Can session modification process according to described notice, performs the cluster loading establishing process of network subsystem side, comprises,
Described MME indicates to gateway S-GW and creates cluster carrying, and in described instruction, carry eNodeB list, MME chain of command TEID information; Described S-GW forwards to PDN Gateway P-GW and creates cluster carrying instruction;
Described P-GW initiates described IP-Can session modification process after receiving described establishment cluster carrying instruction, request dynamic PCC rule, and according to described dynamic PCC regular allocation carrying level qos parameter, initiates to create cluster load bearing process; Described P-GW distributes P-GWS5/S8-TEID, asks described S-GW to create cluster carrying, and in the request described P-GWS5/S8-TEID is sent to described S-GW; Described S-GW distributes corresponding S-GWS5/S8-TEID and sets up the mapping with described P-GWS5/S8-TEID, corresponding S-GWS1-TEID is distributed for each eNodeB in eNodeB list, ask described MME to create cluster carrying, and in the request described S-GWS1-TEID is sent to described MME.
2. method according to claim 1, is characterized in that, described step a comprises,
Business sends user terminal and determines whether self is in connection status, if so, then directly session initiation protocol sip message request wideband multimedia cluster service is sent by default bearer to the multimedia cluster dispatch server MTDS in multimedia cluster scheduler subsystem; If not, then initiate service request ServiceRequest process, set up radio bearer and the S1 carrying of default bearer, send sip message request wideband multimedia cluster service by default bearer to MTDS.
3. method according to claim 1, it is characterized in that, before MTDS described in step b sends wideband multimedia cluster service foundation instruction to each MME, if have employed dynamic strategy and charging control PCC rule, then described MTDS sends application/business information to the strategy in described network subsystem and charging rule functions PCRF, described PCRF, after the described application/business information of preservation, returns acknowledge message to described MTDS.
4. method according to claim 1, it is characterized in that, before MTDS described in step b sends wideband multimedia cluster service foundation instruction to each MME, if described MTDS does not collect group information, then ask cluster group user profile to the HSS in described network subsystem, described cluster group user profile comprises group priority, the list of group Subscriber Number, multicast address, voice/data/video port numbers.
5. method according to claim 1, is characterized in that, described P-GW initiates IP-Can session modification process, and request dynamic PCC rule, comprises,
Described P-GW sends the instruction of IP-Can session modification to described PCRF; If PCRF does not have application/business information and the collection group information of this session, then described PCRF asks the application/service related information of this service conversation to described MTDS; If do not collect group information, then to HSS request collection group information; PCRF formulates dynamic PCC rule according to the application/business information obtained and collection group information, confirms IP-Can session modification to P-GW; Described P-GW is to PCRF sending strategy confirmation.
6. method according to claim 1, is characterized in that, comprises described in step c for business sends user terminal distribution ascending wireless resource and completes corresponding cluster loading establishing process:
Cluster context is set up in the eNodeB request that MME in network subsystem sends user terminal place to business, comprises the request of request and the wideband multimedia cluster service foundation activating cluster bearer context in described request;
The eNodeB that described business sends user terminal place is after described business sends user terminal distribution ascending wireless resource, send user terminal to business and initiate radio resource control RRC connection reconfiguration process, the description of described ascending wireless resource and relevant configuration information are sent to described business and send user terminal;
Described business sends user terminal according to each layer parameter of the information configuration received self, and returns response message to the eNodeB at place, and sends by the eNodeB at place the response activating cluster bearer context to MME;
The eNodeB that described business sends user terminal place is that the business reception user terminal allocation of downlink belonging to same community shares Radio Resource, and in the community that it comprises, broadcast clustered paging message and wideband multimedia cluster service sets up message, informing business receives signaling plane passage and the user face passage that user terminal sets up wideband multimedia cluster service;
The eNodeB that described business sends user terminal place returns the cluster context foundation response of carrying eNodeBS1-TEID to MME;
Described MME receives business and sends the eNodeB at user terminal place and business and send the acknowledge message that user terminal returns, and after having confirmed the foundation that cluster carry, the eNodeB transmission information sending user terminal place to business is pointed out;
Described business sends eNodeB broadcast message prompting in the community that it comprises at user terminal place, and informing business receiving terminal now business transmitting terminal initiates wideband multimedia cluster service.
7. method according to claim 1, is characterized in that, shares Radio Resource and complete corresponding cluster loading establishing process to comprise described in step c for business reception user terminal allocation of downlink:
Ascending wireless resource is distributed concurrently for business sends user terminal with described in step c, MME indicates other eNodeB request in eNodeB list except the eNodeB that business sends user terminal place to set up cluster context, request comprises wideband multimedia cluster service and sets up request, Radio Resource is shared for the business belonging to same community receives user terminal allocation of downlink, and in the community that it comprises, broadcast clustered paging message and wideband multimedia cluster service sets up message, informing business receives signaling plane passage and the user face passage that user terminal sets up wideband multimedia cluster service,
Other eNodeB in eNodeB list except the eNodeB that business sends user terminal place returns to MME the cluster context carrying eNodeBS1-TEID and sets up response; MME receives the response message from each eNodeB, completes the foundation of cluster carrying;
MME receives the acknowledge message that other eNodeB in eNodeB list except the eNodeB that business sends user terminal place returns, and confirm the foundation having completed cluster carrying, then MME sends information prompting to the eNodeB returning acknowledge message, notify this eNodeB broadcast message prompting in the community that it comprises, informing business receiving terminal now business transmitting terminal initiates wideband multimedia cluster service.
8. the method according to claim 6 or 7, is characterized in that, the foundation that described MME completes cluster carrying comprises:
MME in network subsystem receives after the cluster context carrying eNodeBS1-TEID that each eNodeB in eNodeB list sends sets up response, returns and creates cluster carrying response, and described eNodeBS1-TEID is sent to S-GW to S-GW; S-GW records the mapping relations of described eNodeBS1-TEID and S-GWS1-TEID, and described S-GWS5/S8TEID is sent to P-GW by response message, completes the foundation of cluster carrying.
9. method according to claim 1, is characterized in that, described steps d comprises,
MME in network subsystem notifies that the MTDS wideband multimedia cluster service in multimedia cluster scheduler subsystem has been set up;
Described MTDS sends user terminal by default bearer to described business and sends sip message, notify that described business sends user terminal wideband multimedia cluster service and is successfully established, determine that described business sends user terminal and can send wideband multimedia cluster service data flow simultaneously;
Described business sends user terminal and confirms to MTDS transmission sip message.
10. the either method according to claim 1 to 7,9, is characterized in that, the scheduler subsystem of multimedia cluster described in steps d sends user terminal to business and confirms that wideband multimedia cluster service comprises after having set up,
Described business sends user terminal by eNodeB, S-GW and P-GW, and Business Stream is sent to MTDS;
Business Stream carries out mapping and copying by described MTDS, and is distributed to P-GW, S-GW that business receives user terminal place;
Business Stream is sent to each eNodeB in eNodeB list by described S-GW;
Described each eNodeB receives user terminal broadcast broadband multimedia cluster business datum to business in the community that it comprises.
11. methods according to claim 8, is characterized in that, the scheduler subsystem of multimedia cluster described in steps d sends user terminal to business and confirms that wideband multimedia cluster service comprises after having set up,
Described business sends user terminal by eNodeB, S-GW and P-GW, and Business Stream is sent to MTDS;
Business Stream carries out mapping and copying by described MTDS, and is distributed to P-GW, S-GW that business receives user terminal place;
Business Stream is sent to each eNodeB in eNodeB list by described S-GW;
Described each eNodeB receives user terminal broadcast broadband multimedia cluster business datum to business in the community that it comprises.
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| CN103024684B (en) * | 2011-09-23 | 2015-09-16 | 中国普天信息产业股份有限公司 | A kind of implementation method of single call service |
| CN103945338A (en) * | 2013-01-17 | 2014-07-23 | 中国普天信息产业股份有限公司 | Single call service establishing method |
| CN104735629B (en) * | 2013-12-23 | 2018-11-13 | 成都鼎桥通信技术有限公司 | A kind of method of broadcast communication in full-service trunked communication system |
| CN109429186B (en) * | 2017-08-31 | 2021-01-29 | 华为技术有限公司 | Data transmission method and device |
| CN107949014B (en) * | 2017-12-06 | 2023-08-11 | 海能达通信股份有限公司 | Data transmission method, device, system and mobile terminal |
| CN113556686B (en) * | 2020-04-02 | 2022-07-08 | 成都鼎桥通信技术有限公司 | Method and device for identifying EPS (evolved packet System) bearer of B-trunC (B-trunk-trunC) cluster service |
| CN111615004A (en) * | 2020-05-15 | 2020-09-01 | 上海大学 | OTT-TV transmission system and transmission method |
| CN117880330A (en) * | 2024-03-13 | 2024-04-12 | 天津七一二移动通信有限公司 | Dual-mode dispatching desk implementation method suitable for rail transit |
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