CN102088662B - Method for realizing real-time transmission of multimedia service in broadband digital cluster group - Google Patents

Abstract

A method for realizing real-time transmission of multimedia services in a broadband digital trunking group, the method comprising: A, a service sending user terminal sends a trunking multimedia service request to a network subsystem, and the network subsystem authenticates the service sending user terminal, and in the group Establish the S5/S8 bearer of the default bearer of the cluster, and initiate the establishment of the cluster-specific bearer; B. In the uplink, establish the cluster default bearer of the service sending user terminal, and the cluster-specific bearer; C. In the downlink In the middle of the road, establish the cluster default bearer of the service receiving user terminal and the cluster-specific bearer; D. After the cluster bearer is established, the network subsystem sends a service authorization message to the service sending user terminal, and sends a service prompt message to the service receiving user terminal. After applying the embodiment of the present invention, real-time transmission of high-speed multimedia services within a group can be realized.

Description

A method for realizing real-time transmission of multimedia services in a broadband digital trunking group

technical field

The present invention relates to the technical field of trunking communication, and more specifically, relates to a method for realizing real-time transmission of multimedia services in a group in a broadband digital trunking system based on time-division long-term evolution technology.

Background technique

Digital trunking communication system refers to a dedicated mobile communication system in which multiple users share a group of wireless channels and use these channels dynamically. It is a command and dispatch communication system. Compared with the public mobile communication system, a major feature of the trunking communication system is that half-duplex communication is performed through a push-to-talk (PTT, Push To Talk) switch, the connection time is short, the channel utilization rate is high, and the group call function is supported.

Due to its unique characteristics of command, dispatch and quick call, the trunking communication system is widely used in government departments, public security, transportation, military and enterprises with high requirements for command and dispatch. With the acceleration of social informatization and the vigorous development of broadband wireless communication technology, users in the trunking industry are no longer satisfied with a single half-duplex voice call service, but need broadband multimedia services integrating voice, data, image and video . Existing trunking communication systems include MOTOROLA's iDEN (based on TDMA), European standard TETRA (based on TDMA), domestic GOTA (based on CDMA) and GT800 (based on GSM), etc., due to limitations in bandwidth and data transmission rates, The services provided are limited to group PTT calls and some supplementary low-speed data services, and cannot carry out real-time transmission of high-speed multimedia services.

The new generation of broadband wireless access technology Time Division Long Term Evolution (TD-LTE) has the advantages of high bandwidth and low delay, which can ensure the high-speed transmission of multimedia services in the group, and solve the problem that only PTT voice calls can be performed in the trunking communication system for a long time. The problem that real-time transmission of high-speed multimedia services cannot be performed. At present, in the TD-LTE system, there is no method for real-time transmission of multimedia services within a cluster group.

Contents of the invention

The embodiment of the present invention proposes a method for realizing real-time transmission of multimedia services in a broadband digital trunking group, which can realize real-time transmission of high-speed multimedia services in a group.

The technical scheme of the embodiment of the present invention is as follows:

A method for realizing real-time transmission of multimedia services in a broadband digital trunking group, the method comprising:

A. The service-sending user terminal sends a cluster multimedia service request message to the network subsystem, requesting to send multimedia services to a specified group. The network subsystem uses the cluster to carry the QoS parameters by default, and the enhanced base stations E-eNodeB and E-NodeB where the service-sending user terminal is located -eNodeB list establishes the S5/S8 bearer of the uplink and downlink cluster default bearer in the group, and obtains the cluster-specific bearer QoS parameters according to the service type request predefined policy and charging control PCC rules, and according to the cluster Dedicated bearer QoS parameters initiate the establishment of a cluster dedicated bearer within the group, and perform steps B and C at the same time;

B. In the uplink, the digital trunking communication system establishes the wireless bearer of the cluster default bearer of the service sending user terminal according to the cluster default bearer QoS parameters, the cluster specific bearer QoS parameters and the E-eNodeB where the service sending user terminal is located and S1 bearer, as well as the wireless bearer, S1 bearer and S5/S8 bearer of the cluster-specific bearer for service sending user terminals;

C. In the downlink, the digital trunking communication system is the service receiving user terminal belonging to the same cell in this trunking service session, according to the cluster default bearer QoS parameters, the cluster specific bearer QoS parameters and the E - A list composed of eNodeBs, establishing the radio bearer and S1 bearer of the cluster default bearer of the service receiving user terminal, and the radio bearer, S1 bearer and S5/S8 bearer of the cluster-specific bearer of the service receiving user terminal;

D. In the uplink, the sending user terminal sends the multimedia data to the enhanced packet data network gateway eP-GW in the network subsystem through the default bearer of the cluster and the dedicated bearer of the cluster. In the downlink, the multimedia data stream is sent by The eP-GW sends the multimedia data stream to the service receiving user terminal through the cluster-specific bearer and the cluster default bearer.

In the step A, after the network subsystem receives the cluster multimedia service request message, it further includes:

The network subsystem authenticates the service sending user terminal, and after the service sending user terminal passes the authentication, establishes the S5/S8 bearer of the cluster default bearer of the uplink and downlink; otherwise, ends process.

Before the step A, it further includes that the service sending user terminal judges whether it is in the state of being connected to the network, and if the service sending user terminal determines that it is in the state of being connected to the network, it directly reports to the enhanced mobile management entity eMME in the network subsystem Send the clustered multimedia service request message; otherwise, the service sending user terminal initiates a random access process and a radio resource control RRC connection process, and then sends the clustered multimedia service request message to eMME.

In the step A, the establishment of the S5/S8 bearer of the cluster default bearer of the uplink and downlink, and initiate the establishment of the cluster-specific bearer in the group according to the QoS parameters of the cluster-specific bearer, specifically including :

After the eMME receives the cluster multimedia service request message, it sends the service to the service gateway S-GW to send the E-eNodeB where the user terminal is located, the E-eNodeB list, the service type and the cluster default bearer QoS parameter;

The S-GW allocates resources according to the cluster default bearer QoS parameters, and allocates the cluster default bearer S-GWS5/S8-TEID for the E-eNodeB where the service sending user terminal is located and each E-eNodeB in the E-eNodeB list, and then Sending services to eP-GW sends the E-eNodeB where the user terminal is located, the E-eNodeB list, the cluster default bearer S-GW S5/S8-TEID, the service type and the cluster default bearer QoS parameters;

The eP-GW allocates resources according to the cluster default bearer QoS parameters, and assigns the cluster default bearer eP-GWS5/S8-TEID, eP -GW requests predefined policies and charging control PCC rules from eHSS according to the service type, and eP-GW allocates cluster-specific bearer QoS parameters according to the PCC rules, and sends the E-eNodeB and E-eNodeB list where the user terminal is located for the service Each E-eNodeB in the cluster allocates the cluster-specific bearer eP-GW S5/S8-TEID, and then returns to the S-GW the cluster default bearer QoS parameters, the cluster-specific bearer QoS parameters, and the cluster default bearer eP-GW S5/S8-TEID. S8-TEID and cluster-specific bearer eP-GWS5/S8-TEID;

The S-GW records the mapping relationship between the cluster default bearer S-GWS5/S8-TEID and the eP-GW S5/S8-TEID of the service sending user terminal and the service receiving user terminal. The S5/S8 bearer of the provincial bearer is established.

In the step B, establishing the radio bearer of the cluster default bearer and the radio bearer of the cluster-specific bearer includes,

The eMME sends the cluster default bearer QoS parameters and the cluster-specific bearer QoS parameters to the E-eNodeB where the service sending user terminal is located;

The E-eNodeB where the service sending user terminal is located maps the cluster default bearer QoS parameters and cluster-specific bearer QoS parameters to radio bearer QoS parameters respectively, and establishes the cluster default bearer radio bearer and cluster-specific bearer QoS parameters based on the radio bearer QoS parameters. The bearer's radio bearer.

In the step A, after the S5/S8 bearer of the cluster default bearer of the uplink and downlink is established, it also includes

The S-GW allocates the cluster default bearer S-GW S1-TEID and the cluster-specific bearer S-GW S1-TEID for the E-eNodeB where the service sending user terminal is located and each E-eNodeB in the E-eNodeB list, and sends The cluster default bearer S-GW S1-TEID and the cluster-specific bearer S-GW S1-TEID are sent to eMME;

In the step B, establishing the S1 bearer of the cluster default bearer, the S1 bearer of the cluster-specific bearer, and the S5/S8 bearer of the cluster-specific bearer includes,

E-eNodeB sends the cluster default bearer E-eNodeB S1-TEID and cluster dedicated bearer E-eNodeB S1-TEID to eMME;

The eMME forwards the cluster default bearer E-eNodeB S1-TEID and the cluster-specific bearer E-eNodeBS1-TEID to the S-GW, and the S-GW records the mapping relationship between the cluster default bearer S-GW S1-TEID and E-eNodeBS1-TEID , the S1 bearer of the default bearer of the cluster is established; the mapping relationship between the cluster-specific bearer S-GW S1-TEID and the E-eNodeB S1-TEID is recorded, and the S1 bearer of the cluster-specific bearer is established; The E-eNodeB where the sending user terminal is located allocates the cluster-specific bearer S-GW S5/S8-TEID and sends it to the eP-GW;

The eP-GW records the mapping relationship between the cluster-specific bearer eP-GW S5/S8-TEID and the S-GW S5/S8-TEID, and the S5/S8 bearer of the cluster-specific bearer is established.

In the step C, the establishment specifically includes,

eMME sends cluster default bearer QoS parameters and cluster specific bearer QoS parameters to each E-eNodeB in the E-eNodeB list;

The E-eNodeB allocates the cluster default bearer radio bearer resources according to the cluster default bearer QoS parameters, and allocates the cluster default bearer E-eNodeB S1-TEID, and allocates the cluster-specific bearer radio bearer resources according to the cluster-specific bearer QoS parameters, and Assign cluster-specific bearer E-eNodeB S1-TEID and send it to eMME;

The eMME forwards the cluster default bearer E-eNodeB S1-TEID and the cluster-specific bearer E-eNodeB S1-TEID to the S-GW, and the S-GW records the cluster default bearer S-GW S1-TEID and the cluster default bearer E-eNodeB The mapping relationship of S1-TEID, the S1 bearer of the default bearer of the cluster is established; record the mapping relationship between the cluster-specific bearer S-GW S1-TEID and the cluster-specific bearer E-eNodeB S1-TEID, the cluster-specific bearer The S1 bearer is established; and for each E-eNodeB in the E-eNodeB list, the cluster-specific bearer S-GW S5/S8-TEID is allocated and sent to the eP-GW;

The eP-GW records the mapping relationship between the cluster-specific bearer eP-GW S5/S8-TEID and the cluster-specific bearer S-GW S5/S8-TEID by the cluster, and the S5/S8 bearer of the cluster-specific bearer is established.

After the eMME sends the cluster default bearer QoS parameters and the cluster-specific bearer QoS parameters to each E-eNodeB in the E-eNodeB list, it further includes that the E-eNodeB sends the cluster default bearer QoS parameters and the cluster-specific bearer QoS parameters to each E-eNodeB list. The parameters are respectively mapped to radio bearer QoS parameters, and downlink shared radio resources are allocated by the radio bearer QoS parameters;

The E-eNodeB notifies the service receiving user terminal of the allocated downlink shared radio resource, and completes the establishment of the radio bearer of the cluster default bearer and the cluster dedicated bearer.

After the step C, before the step D, it further includes determining the establishment of uplink and downlink cluster bearers, specifically including:

The eMME receives the confirmation message returned by any E-eNodeB in the E-eNodeB list, and the E-eNodeB has established a service with the S-GW to send the cluster default bearer of the user terminal and the S1 bearer of the cluster dedicated bearer.

After the determination of the uplink and downlink cluster bearer is established, before step D further includes,

The network subsystem sends a service authorization message to the service sending user terminal, and sends service prompt information to the service receiving user terminal.

The step D specifically includes, in the uplink, the service sending user terminal sends the multimedia data to the E-eNodeB where the service sending user terminal is located through the radio bearer of the cluster default bearer and the cluster dedicated bearer, and the multimedia data stream is sent by The S1 bearer of the cluster default bearer and the cluster-specific bearer is sent to the S-GW, and then the S5/S8 bearer of the cluster default bearer and the cluster-specific bearer is sent to the eP-GW in the network subsystem; the downlink , the multimedia data stream is sent to the S-GW through the S5/S8 bearer of the cluster default bearer and the cluster-specific bearer, and then the multimedia data stream is sent to the E-eNodeB list by the S1 bearer of the cluster default bearer and the cluster-specific bearer Each E-eNodeB sends the multimedia data stream to the service receiving user terminal.

In the uplink, when the multimedia data stream is sent to the eP-GW, the eP-GW maps and copies the received multimedia data stream, and in the downlink, the eP-GW passes the multimedia data stream through the cluster dedicated The S5/S8 bearer of the bearer is sent to the S-GW.

It can be seen from the above technical solutions that in the embodiment of the present invention, the service sending user terminal sends a trunked multimedia service request to the network subsystem, and the network subsystem authenticates the service sending user terminal after receiving the request, and if the authentication passes, then Establish the S5/S8 bearer of the uplink and downlink cluster default bearer in the group, and initiate the establishment of the cluster-specific bearer according to the QoS required by the business, so as to meet the bandwidth, rate, and delay requirements of the multimedia service in the group and real-time requirements. After establishing the S5/S8 bearer for the cluster default bearer of the uplink and downlink, establish the cluster default bearer and the cluster-specific bearer for the service sending user terminal in the uplink, and establish the service receiving user terminal in the downlink The cluster default bearer and the cluster-specific bearer, the digital trunking communication system allocates network resources for the service sending user terminal and the service receiving user terminal in the group at the same time, which greatly reduces the time for establishing the trunking service session in the group. After the cluster bearer is established, the network subsystem sends a service authorization message to the service sending user terminal, and sends a service prompt message to the service receiving user terminal, and the service sending user terminal transmits the multimedia data through the cluster default bearer and the cluster dedicated bearer in the uplink. The stream is sent to the network subsystem, and the network subsystem sends the multimedia data stream to the service receiving user terminal through the cluster default bearer and the cluster dedicated bearer in the downlink, realizing the real-time transmission of high-speed multimedia services in the group.

Description of drawings

Fig. 1 is a schematic diagram of the network structure of the broadband digital trunking communication system in the present invention.

FIG. 2 is a schematic flowchart of a method for realizing real-time transmission of multimedia services in a broadband digital trunking group according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a method for realizing real-time transmission of multimedia services in a broadband digital trunking group according to an embodiment of the present invention, including Fig. 3a and Fig. 3b.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The invention proposes a method for realizing real-time transmission of multimedia services in a broadband digital trunking group, and the method is implemented in a broadband digital trunking communication system based on TD-LTE. TD-LTE technology is a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) evolution technology. It is a model for the integration of mobile communication and broadband wireless access, and it is also one of the mainstream standards for future broadband mobile communication. Compared with the existing trunking communication system, the broadband digital trunking communication system based on TD-LTE technology has larger channel capacity, higher spectrum utilization, stronger anti-interference ability and better transmission performance. The broadband digital trunking communication system of LTE technology can realize the real-time transmission of high-speed multimedia services in the group.

FIG. 1 is a schematic diagram of a network structure of a digital trunking communication system based on Time Division Long Term Evolution (TD-LTE, Time Division-Long Term Evolution) technology in the prior art. As shown in Figure 1, it includes four main components: terminal, broadband wireless access subsystem, network subsystem and operation and maintenance subsystem; each component will be introduced in detail below.

1. Terminal

The terminal refers to the equipment that the user can directly operate, including the user terminal and the dispatching station. The user terminal is composed of a mobile terminal and a fixed station; the dispatching station is composed of a wired dispatching station and a wireless dispatching station. The terminal is connected with the broadband wireless access subsystem or the network subsystem through an air interface or a wired connection. Wherein, the mobile terminal may specifically include a handheld mobile station, a vehicle-mounted station, and the like.

2. Broadband wireless access subsystem

The broadband wireless access subsystem is mainly composed of enhanced base stations (E-eNodeB). It is responsible for the relevant processing of the cluster service, including: receiving cluster control signaling from the enhanced mobile management entity (eMME), allocating wireless resources for the terminal (for example, allocating downlink shared wireless resources for the cell where the terminal receiving the service data flow is located), And the service data stream sent by the service sending terminal received from the service gateway (S-GW) is sent to the service receiving terminal and the like.

3. Network subsystem

The network subsystem is mainly composed of eMME, Serving Gateway (S-GW), Enhanced Home Subscriber Server (eHSS), Enhanced Packet Data Network Gateway (eP-GW) and Dispatch Gateway (D-GW), which are used to complete the cluster Functions such as user call control, cluster scheduling, service data flow transmission, and cluster user data management.

Among them, the eMME is the core device for realizing the trunking service, responsible for authenticating the terminal and authorizing the trunking service, and initiating the establishment of a service bearer for the successfully authenticated terminal.

The S-GW is the end point of the packet data interface connected to the broadband wireless access subsystem, and is mainly responsible for routing and forwarding of data packets.

The eP-GW is a gateway connected to the external data network, used to complete the mapping, replication and distribution of the cluster service data flow (distributed to the S-GW), and initiate the establishment of the service bearer according to the characteristics of the cluster service initiated by the terminal and the QoS requirements.

eHSS is used to store and manage group user information related to cluster services.

D-GW provides access to the wired dispatcher and authenticates the wired dispatcher; in addition, it is also responsible for transmitting the control signaling between the wired dispatcher and eMME and eHSS in the network subsystem, as well as the communication between the wired dispatcher and eP- Service data flow between GWs.

4. Operation and maintenance subsystem

Operations such as opening and canceling accounts of cluster users and changing user terminal business permissions can be performed through the operation and maintenance subsystem.

In the present invention, channel establishment for real-time transmission of multimedia services in a group is divided into two parts: an uplink and a downlink. In the uplink, the cluster default bearer and the cluster-specific bearer of the service sending user terminal need to be established, and the cluster default bearer is the wireless link between the service sending user terminal and the E-eNodeB in the broadband wireless access subsystem. The bearer, the S1 bearer between the E-eNodeB and the S-GW in the network subsystem, and the S5/S8 bearer between the S-GW and the eP-GW in the network subsystem; the corresponding cluster-specific bearer is also composed of wireless Bearer, S1 bearer and S5/S8 bearer.

In the real-time transmission downlink of multimedia services in the group, it is necessary to establish the cluster default bearer and the cluster-specific service bearer of the service receiving user terminal. The cluster default bearer of the service receiving user terminal includes radio bearer, S1 bearer and S5/ S8 bearer; and the cluster-specific bearer of the service receiving user terminal includes radio bearer, S1 bearer and S5/S8 bearer.

Real-time transmission of multimedia services in the group After the uplink and downlink are established, the service sending user terminal sends the data stream to the eP-GW through the E-eNodeB and S-GW where it is located, and completes the multimedia data stream in the uplink Then, the eP-GW maps and copies the data flow, and distributes it to the S-GW where the service sending user terminal is located, and the S-GW where the service sending user terminal is located sends the data flow to each node in the E-eNodeB list each E-eNodeB, and then each E-eNodeB sends the data stream to each service receiving user terminal included in itself, and completes the transmission of the downlink multimedia data stream.

Fig. 2 is a schematic flowchart of a method for realizing real-time transmission of multimedia services in a broadband digital trunking group according to an embodiment of the present invention, wherein steps 201-202 are the establishment process of the uplink, and steps 201 and 203 are the establishment process of the downlink. Specifically include the following steps:

Step 201, the service sending user terminal sends a cluster multimedia service request to the network subsystem.

The service sending user terminal sends a cluster multimedia service request message to the eMME, and the eMME authenticates the service sending user terminal, and establishes the S5/S8 bearer of the cluster default bearer of the service sending user terminal and the service receiving user terminal in the group.

First, the service sending user terminal determines whether it is in a state of being connected to the network. If the service-sending user terminal determines that it is connected to the network, it will directly send a clustered multimedia service request message to the eMME in the network subsystem; otherwise, the service-sending user terminal initiates a random access process and a radio resource control (RRC) connection establishment process , establish uplink synchronization with the E-eNodeB, then acquire signaling bearer resources for sending service requests, and then send a clustered multimedia service request message to the eMME. The random access procedure and the radio resource control (RRC) connection establishment procedure are standard signaling procedures of the TD-LTE mobile communication system, and will not be repeated here.

After receiving the cluster multimedia service request message, the eMME interacts with the eHSS to perform service authentication on the service sending terminal. If the eMME does not pass the authentication of the service sending user terminal, it rejects the service request of the service sending user terminal and ends the session; if the service sending user terminal passes the authentication, the eMME requests the cluster group from the eHSS in the network subsystem The detailed information of each user terminal in the group, and according to the detailed information of each user terminal, establish the S5/S8 bearer of the cluster default bearer in the uplink and downlink for this cluster service session in the group.

The establishment of the S5/S8 bearer of the cluster default bearer of this cluster service session specifically includes: the eMME sends to the S-GW in the network subsystem the E-eNodeB, the E-eNodeB list, and the cluster default Save information such as QoS parameters, service types and other information to create a cluster default bearer request message; S-GW allocates bearer resources according to the cluster default QoS parameters, and sends the E-eNodeB where the user terminal is located and each E-NodeB in the E-eNodeB list for the service. -eNodeB allocates the S-GW S5/S8-TEID carried by the cluster by default, and sends it to the eP-GW in the network subsystem; Each E-eNodeB in the E-eNodeB and E-eNodeB list assigns the cluster to carry the eP-GW S5/S8-TEID by default, and the eP-GW sends the service type requested by the user terminal according to the service, and requests the predefined PCC rules from the eHSS , and according to the PCC rules, it is judged that one or more cluster-specific bearers need to be created for this cluster service session, then the eP-GW allocates the cluster-specific bearer QoS parameters according to the PCC rules, and sends the E-eNodeB where the user terminal is located and Each E-eNodeB in the E-eNodeB list allocates the cluster-specific bearer eP-GWS5/S8-TEID, and initiates the establishment process of the cluster-specific bearer; the eP-GW returns the cluster default bearer QoS parameters, cluster default Provincial bearer eP-GW S5/S8-TEID, cluster-specific bearer QoS parameters, cluster-specific bearer eP-GW S5/S8 TEID; S-GW records the cluster default bearer of service sending user terminals and service receiving user terminals The mapping relationship between the S-GW S5/S8 TEID and the eP-GW S5/S8 TEID completes the establishment of the S5/S8 bearer for the cluster default bearer of the service sending user terminal and the service receiving user terminal; The E-eNodeB where the terminal is located and each E-eNodeB in the E-eNodeB list allocates the S-GW S1-TEID of the default bearer of the cluster and sends it to eMME; at the same time, the S-GW allocates the cluster-specific bearer according to the QoS parameters of the cluster-specific bearer resources, and send the S-GWS1-TEID of the cluster-specific bearer to the E-eNodeB where the user terminal is located and each E-eNodeB in the E-eNodeB list to send the service to the eMME. The PCC rules and the formulation of the rules are existing technologies in the TD-LTE system, and will not be repeated here.

The cluster default bearer is a necessary bearer established when each group initiates a basic voice call. Whether a dedicated bearer needs to be established in the present invention, and several dedicated bearers need to be established, depending on the PCC rules. The formulation of the PCC and the rules is an existing technology and will not be repeated here. All bearers other than the cluster default bearer are called cluster-specific bearers. For example, for basic voice calls, for digital trunking communication systems, data packets with the same requirements on delay and packet loss rate (that is, the same QoS) are transmitted, and only one default trunking bearer can be established to meet the transmission requirements of voice services; For the video call service, voice, data and video are integrated. Since the voice, data and video have different requirements on delay and packet loss rate (that is, different QoS), when the digital trunking communication system transmits the video call service, in addition to When establishing the cluster default bearer, a cluster-specific bearer must also be established. These bearers have different QoS to meet the real-time transmission of video services.

Step 202, the digital trunking communication system allocates uplink radio resources for the service sending user terminal, and completes the establishment of the trunking default bearer and the trunking dedicated bearer of the service sending user terminal.

The default bearer of the service sending user terminal cluster is composed of the wireless bearer of the cluster default bearer, the S1 bearer of the cluster default bearer and the S5/S8 bearer of the cluster default bearer; The wireless bearer of the bearer, the S1 bearer of the cluster-specific bearer, and the S5/S8 bearer of the cluster-specific bearer.

The digital trunking communication system establishes a radio bearer and an S1 bearer of the cluster default bearer, and a radio bearer and an S1 bearer of the cluster-specific bearer for the service sending user terminal.

Among them, after receiving the S-GWS1-TEID of the default bearer of the service sending user terminal cluster and the S-GW S1-TEID of the cluster-specific bearer sent by the S-GW, the eMME instructs the E-eNodeB where the service sending user terminal is located to send the service. The user terminal allocates uplink radio resources; the E-eNodeB where the service sending user terminal is located sends an RRC connection reconfiguration message to the service sending terminal, which carries the uplink radio resource description and security-related configuration information; the service sending user terminal according to The received information configures its own parameters of each layer, and sends an RRC connection reconfiguration complete message to the E-eNodeB where it is located, and completes the establishment of the radio bearer of the cluster-specific bearer of the service sending user terminal and the radio bearer of the cluster default bearer.

After receiving the RRC connection reconfiguration completion message, the E-eNodeB where the service sending user terminal is located allocates the E-eNodeB S1-TEID of the cluster default bearer and the cluster-specific bearer, and sends them to the eMME; The E-eNodeB S1-TEID of the dedicated bearer is sent to the S-GW; the S-GW records the mapping relationship between the E-eNodeB S1-TEID carried by the cluster and the S-GW S1-TEID by default, and returns a confirmation message to the eMME to complete The S1 bearer of the default bearer of the cluster is established; at the same time, the S-GW records the mapping relationship between the E-eNodeB S1-TEID of the cluster-specific bearer and the S-GW S1-TEID, and completes the establishment of the S1 bearer of the cluster-specific bearer. Send the S-GW S5/S8-TEID assigned by the E-eNodeB where the user terminal is located and sent to the eP-GW.

eP-GW records the mapping relationship between S-GW S5/S8-TEID and eP-GW S5/S8-TEID of the cluster-specific bearer of the service sending user terminal, and completes the S5/S8 bearer of the cluster-specific bearer of the service sending user terminal Establish.

So far, the radio bearer of the cluster default bearer, the S1 bearer of the cluster default bearer, and the S5/S8 bearer of the cluster default bearer included in the cluster default bearer of the service sending user terminal in the uplink are all successfully established; the uplink The wireless bearer of the cluster-specific bearer, the S1 bearer of the cluster-specific bearer, and the S5/S8 bearer of the cluster-specific bearer included in the cluster-specific bearer of the user terminal for medium service transmission are all established similarly.

Step 203, the digital trunking communication system allocates downlink radio resources for the service receiving user terminal, and completes the establishment of the trunking default bearer and the trunking service dedicated bearer of the service receiving user terminal.

The digital trunking communication system allocates shared downlink radio resources for service receiving terminals belonging to the same cell among all service receiving user terminals, and notifies the service receiving terminals. And step 202 and step 203 are performed simultaneously.

Among them, after the eMME receives the S-GWS1-TEID of the cluster default bearer of the service receiving user terminal sent by the S-GW and the S-GW S1-TEID of the cluster-specific bearer, the eMME instructs each E in the E-eNodeB list -The eNodeB allocates downlink shared radio resources in all the cells it contains; each E-eNodeB completes the allocation of downlink shared radio resources, and notifies the user terminal receiving the service, the radio of the default bearer of the cluster and the dedicated bearer of the cluster Bearer establishment; at the same time, each E-eNodeB returns a confirmation message to the eMME, instructing the eMME to establish the S1 bearer of the cluster default bearer and the S1 bearer of the cluster-specific bearer.

The eMME receives the confirmation message from each E-eNodeB, obtains the E-NodeB S1-TEID of the cluster default bearer and the cluster-specific bearer allocated by each E-eNodeB for the service receiving user terminal, and sends it to the S -GW; S-GW records the mapping relationship between the E-eNodeBS1-TEID and S-GW S1-TEID carried by the cluster by default, and returns a confirmation message to eMME to complete the establishment of the S1 bearer carried by the cluster by default; at the same time, the S-GW Record the mapping relationship between the E-eNodeB S1-TEID and S-GW S1-TEID of the cluster-specific bearer, complete the establishment of the S1 bearer of the cluster-specific bearer, and assign service receiving users to each E-eNodeB in the E-eNodeB list The S-GW S5/S8-TEID carried exclusively by the cluster of the terminal is sent to the eP-GW.

eP-GW records the mapping relationship between the S-GW S5/S8-TEID and the eP-GW S5/S8-TEID of the cluster-specific bearer of the service receiving user terminal, and completes the S5/S8 bearer of the cluster-specific bearer of the service receiving user terminal Establish.

It can be seen from the above that in the downlink, the radio bearer and S1 bearer included in the default bearer of the service receiving user terminal cluster, and the cluster-specific radio bearer, S1 bearer and S5/ All S8 bearers are successfully established.

In steps 201 and 202, the cluster-specific bearer and cluster default bearer of the service sending user terminal in the uplink of this cluster session are established; in steps 201 and 203, the service receiving user terminal in the downlink of this cluster session The terminal's cluster-specific bearer and cluster default bearer are established, and at this time, the cluster service session bearer is established.

In step 204, the intra-group cluster service session is established.

The network subsystem sends the cluster service authorization to the service sending user terminal, and sends the cluster service prompt information to the service receiving user terminal, and the establishment of the cluster service session bearer in the group is completed.

The eMME confirms that it has received the confirmation message returned by any E-eNodeB in the E-eNodeB list, and confirms that the E-eNodeB in the returned message has established a service with the S-GW to send the cluster default bearer and cluster-specific bearer of the user terminal. S1 bearer, the E-eNodeB where the service sending user terminal is located sends a cluster service authorization message to the service sending user terminal to notify the service sending user terminal that the multimedia data stream can be sent; at the same time, eMME sends a service prompt to the E-eNodeB that returns the confirmation message message, which sends cluster service prompt information to the included service receiving user terminal, and the cluster service session is established.

After the cluster service session is established, the service sending user terminal sends the data flow to the eP-GW through the E-eNodeB and S-GW where it is located; then, the eP-GW maps and copies the data flow, and distributes it to the service receiving user terminal The S-GW where the service receiving user terminal is located sends the multimedia data stream to each E-eNodeB in the E-eNodeB list; each E-eNodeB sends the multimedia data stream to each Service receiving user terminal.

The method for real-time transmission of multimedia services within a group will be further described in detail below with reference to Fig. 3 through specific examples.

Fig. 3 is a schematic diagram of a method for realizing real-time transmission of multimedia services in a broadband digital trunking group in a method embodiment of the present invention. Due to space limitations, Figure 3 is divided into upper and lower parts, which are shown in Figure 3a and Figure 3b respectively. In the figure, UE1 is a service sending user terminal, and UE2 and UE3 are two service receiving user terminals in the group.

Among them, A (301) is the process of the service sending user terminal initiating a cluster multimedia service request in the group; B (302-307) is the process of eMME authenticating the service sending user terminal and establishing a clustering fault for the service sending user terminal and the service receiving user terminal Save the S5/S8 bearer of the bearer, and initiate the cluster-specific bearer establishment process; in C (308-314), the eMME instructs the E-eNodeB where the service sending user terminal is located to allocate uplink wireless resources for the service sending user terminal, and establish a cluster The default bearer and the wireless bearer of the cluster-specific bearer. In this process, the S1 bearer of the cluster default bearer, the S1 bearer of the cluster-specific bearer, and the S5/S8 bearer of the cluster-specific bearer are also established; in D (315-319) The eMME instructs each E-eNodeB in the E-eNodeB list to allocate downlink shared radio resources in all the cells it contains, and establish the radio bearer of the cluster default bearer and the S1 bearer, as well as the radio bearer of the cluster-specific bearer , S1 bearer and S5/S8 bearer; the eMME in E (320-321) sends a service authorization message to the service sending terminal, and sends a service prompt message to the service receiving terminal. During the real-time transmission of multimedia services, step C and step D are performed in parallel.

Step 301, when a service sending user terminal initiates a cluster multimedia service in a group, the service sending terminal may be in a connected state or an idle state. If the service sending user terminal is in the connected state, the service sending user terminal enters the group number, and when the service sending key is pressed, the service sending user terminal directly sends the trunking multimedia service request (Trunking Multimedia Service Request) through the E-eNodeB to the eMME, wherein the trunking multimedia service request carries information such as the service sending user terminal number, group number, emergency identification, and service type.

If the service sending user terminal is in an idle state, when the service sending user terminal enters the group number and presses the service sending key, the service sending user terminal needs to first initiate the random access process and the RRC connection establishment process. Through these two processes, the service The sending user terminal can establish uplink synchronization with the E-eNodeB and obtain the signaling bearer resource for sending the service request, and then send the trunking multimedia service request to the eMME through the NAS message, where the trunking multimedia service request carries the service sending user terminal number, Group number, emergency identification, business type and other information.

In step 302, the eMME interacts with the eHSS to authenticate the service sending user terminal.

If the authentication of the service sending user terminal fails, the eMME rejects the trunking multimedia service request of the service sending user terminal, and the trunking service session ends; if the service sending user terminal passes the authentication, the eMME The number requests the detailed information of the group user terminal from eHSS. The detailed information of the group users includes at least a list composed of E-eNodeBs in the group where the user terminal that currently initiates the cluster multimedia service is located, a list composed of dispatching stations that the users in the group belong to, and a multicast IP address (the destination address for service transmission) , group priority, cluster default QoS parameters, service type and other information.

Step 303, the authentication of the service sending user terminal is successful, and the eMME sends a Create Trunking Default Bearer Request (Create Trunking Default Bearer Request) message to the S-GW to initiate the establishment of the S5/S8 bearer of the cluster default bearer for this cluster service session, The message at least carries information such as the service sending user terminal number, group number, E-eNodeB where the service sending user terminal is located, E-eNodeB list, group priority, cluster default QoS parameters, and service type.

Step 304: The S-GW allocates bearer resources according to the cluster default QoS parameter in the cluster default bearer request sent by the eMME, and allocates the uplink cluster default bearer S-GW S5 for the E-eNodeB where the service sending user terminal is located /S8-TEID, for each E-eNodeB in the E-eNodeB list allocates the downlink cluster default bearer S-GW S5/S8-TEID, and then sends a request message to create a cluster default bearer to eP-GW, in the message Carry at least the service sending user terminal number, group number, E-eNodeB where the service sending user terminal is located, E-eNodeB list, S-GWS5/S8-TEID carried by the cluster default, group priority, cluster default QoS parameters, Business type and other information.

Step 305, based on the service type in the received Create Cluster Default Bearer Request message, the eP-GW requests the eHSS for predefined PCC rules, and judges that one or more cluster-specific bearers need to be created for this session according to the PCC rules, Then the eP-GW allocates the cluster-specific bearer QoS parameters according to the PCC rules, and initiates the establishment process of the cluster-specific bearer.

It should be noted that the eP-GW can also determine whether to create one or more cluster-specific bearers for this session according to the dynamic PCC rules. However, since the trunking communication system is a dedicated communication system for key industries and departments, it has high requirements for cluster scheduling and session establishment delay, so the predefined PCC rules are usually used to unconditionally guarantee the service quality of cluster users or cluster services. Avoid QoS negotiation process.

Step 306, according to the predefined PCC rules, eP-GW needs to create one or more cluster-specific bearers, then eP-GW returns to the S-GW a response to create a cluster default bearer and a request to create a cluster-specific bearer (Create Trunking Default Bearer Response and Create Trunking Dedicated BearerRequest(s)) message, the cluster default bearer response message contains the service sending user terminal number, group number, cluster default bearer QoS parameters, cluster default bearer eP-GW S5/S8 -TEID, the E-eNodeB where the service sending user terminal is located, and the E-eNodeB list; the request message for creating a cluster-specific bearer includes the service-sending user terminal number, group number, cluster-specific bearer QoS parameters, and cluster-specific bearer eP -GW S5/S8 TEID, the E-eNodeB where the service sending user terminal is located, and the E-eNodeB list.

Step 307: The S-GW obtains the eP-GW S5/S8-TEID of the uplink and downlink cluster default bearers from the create cluster default bearer response message, and records the uplink and downlink cluster default bearers The mapping relationship between the S-GW S5/S8 TEID and the eP-GW S5/S8 TEID completes the establishment of the S5/S8 bearer of the uplink and downlink cluster default bearer. The S-GW obtains the E-eNodeB and the E-eNodeB list where the service sending user terminal is located from the create cluster default bearer response message, and allocates the uplink cluster default bearer S-GW S1 for the E-eNodeB where the service sending user terminal is located - TEID, for each E-eNodeB in the E-eNodeB list allocates the S-GWS1-TEID of the cluster default bearer of the downlink.

At the same time, the S-GW allocates cluster-specific bearer resources according to the cluster-specific bearer QoS parameters in the cluster-specific bearer creation request message; -eNodeB list, allocate uplink cluster-specific bearer S-GW S1-TEID for the E-eNodeB where the service sending user terminal is located, and allocate downlink cluster-specific bearer for each E-eNodeB in the E-eNodeB list The S-GW S1-TEID.

Then, the S-GW sends a Create Trunking Default Bearer Response and Create Trunking Dedicated BearerRequest(s) message to the eMME. Create the cluster default bearer response message to carry the service sending user terminal number, group number, E-eNodeB where the service sending user terminal is located, E-eNodeB list, cluster default bearer QoS parameters, and cluster default bearer S-GW S1 -TEID, create a cluster-specific bearer request message that carries the service sending user terminal number, group number, E-eNodeB where the service sending user terminal is located, E-eNodeB list, cluster-specific bearer QoS parameters, and cluster-specific bearer S -GW S1-TEID.

So far, the establishment of the S5/S8 bearers of the uplink and downlink cluster default bearers in this cluster service session is completed.

Step 308: After the S5/S8 bearer of the cluster default bearer in the uplink and downlink is established, the eMME sends a cluster default bearer establishment request and a cluster-specific bearer establishment request (Trunking Default Bearer Setup Request and Trunking Dedicated Bearer Setup Request(s)) messages. The eMME sends a cluster default bearer establishment request and a cluster-specific bearer establishment request to the E-eNodeB where the service sending terminal is located. The purpose is to allocate uplink radio resources for the service sending user terminal and establish a radio bearer for the service sending user terminal. and S1 bearer.

The cluster default bearer establishment request message carries the service sending user terminal number, group number, cluster default bearer QoS parameters, cluster default bearer S-GW S1-TEID corresponding to the E-eNodeB where the service sending user terminal is located, group broadcast IP address. The cluster-specific bearer establishment request message carries the service sending user terminal number, group number, cluster-specific bearer QoS parameters, S-GW S1-TEID of the cluster-specific bearer corresponding to the E-eNodeB where the service sending user terminal is located, group broadcast IP address.

Step 309, the E-eNodeB where the service sending user terminal is located maps the cluster default bearer QoS parameters and the cluster specific bearer QoS parameters to radio bearer QoS parameters according to the cluster default bearer establishment request and the cluster-specific bearer establishment request message, and Send an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message to the service sending user terminal, modify the established RRC connection, and complete the establishment of the radio bearer of the cluster default bearer and the cluster-specific bearer. The RRC connection reconfiguration message carries uplink radio resource description (such as physical channel configuration) and other security-related configuration information.

Step 310, the service sending user terminal sends an RRC connection reconfiguration complete (RRCConnection Reconfiguration Complete) message to the E-eNodeB after configuring its own layer parameters according to the RRC connection reconfiguration message sent by the E-eNodeB to confirm the cluster default bearer and cluster The radio bearer of the dedicated bearer is established.

So far, the cluster default bearer of the service sending user terminal and the radio bearer of the cluster dedicated bearer are established.

Step 311, after the E-eNodeB where the service sending user terminal is located receives the RRC connection reconfiguration completion message of the service sending user terminal, it sends a cluster default bearer setup response and a cluster specific bearer setup response (Trunking Default Bearer Setup Response and Trunking Dedicated Bearer Setup Response(s)) message.

The cluster default bearer establishment response message carries the service sending user terminal number, group number, and the E-NodeB S1-TEID of the cluster default bearer assigned by the E-eNodeB where the service sending user terminal is located; the cluster-specific bearer establishment response message carries The service sending user terminal number, group number, and the E-NodeB S1-TEID assigned by the E-eNodeB where the service sending user terminal resides is dedicated to the bearer of the cluster.

Step 312: After the eMME receives the cluster default bearer establishment response and the cluster-specific bearer establishment response sent by the E-eNodeB where the service sending user terminal is located, it updates the cluster default bearer carrying the E-eNodeBS1-TEID of the cluster default bearer. The bearer request (Update Trunking Default Bearer Request) message and the update cluster-specific bearer request (Create Trunking Dedicated Bearer Response(s)) message carrying the E-eNodeB S1-TEID and E-eNodeB list of the cluster-specific bearer are sent to S -GW, so as to establish the S1 bearer of the cluster default bearer and the cluster-specific bearer in the uplink.

Step 313, the S-GW obtains the E-eNodeB S1-TEID of the cluster default bearer from the update cluster default bearer request message, and the S-GW records the mapping between the E-eNodeB S1-TEID and the S-GWS1-TEID of the cluster default bearer Complete the establishment of the S1 bearer of the cluster default bearer, and send an Update Trunking Default Bearer Response (Update Trunking Default Bearer Response) message to the eMME to confirm the establishment of the S1 bearer of the cluster default bearer.

The radio bearer of the cluster default bearer included in the cluster default bearer is established in step 310, the S1 bearer of the cluster default bearer is established in step 313, and the S5/S8 bearer of the cluster default bearer is established in step 307 . So far, the radio bearer, S1 bearer and S5/S8 bearer of the cluster default bearer included in the cluster default bearer of the service sending user terminal are all successfully established.

At the same time, the S-GW obtains the E-eNodeBS1-TEID of the cluster-specific bearer from the update cluster-specific bearer request message, and the S-GW records the mapping relationship between the E-eNodeB S1-TEID of the cluster-specific bearer and the S-GW S1-TEID , complete the establishment of the S1 bearer dedicated to the cluster, and assign the S-GW S5/S8-TEID of the cluster dedicated bearer to the E-eNodeB where the service sending user terminal is located, and create a dedicated bearer response (Create Trunking Dedicated Bearer Response( s)) message is sent to eP-GW.

Step 314, eP-GW receives the create dedicated bearer response message, records the mapping relationship between the S-GW S5/S8-TEID and eP-GW S5/S8-TEID of the cluster-specific bearer in the message, and completes the cluster-specific bearer The bearer's S5/S8 bearer is established.

The radio bearer of the cluster-specific bearer included in the cluster-specific bearer is established in step 310, the S1 bearer of the cluster-specific bearer is established in step 313, and the S5/S8 bearer of the cluster-specific bearer is established in step 314 . So far, the radio bearer, S1 bearer and S5/S8 bearer of the cluster-specific bearer included in the cluster-specific bearer of the service sending user terminal are all successfully established.

The establishment of the default bearer of the service sending user terminal cluster and the cluster-specific bearer completes the establishment of the uplink bearer of the cluster service session.

Step 315: After the S5/S8 bearer of the service receiving user terminal cluster default bearer is established, the eMME sends a cluster default bearer establishment request and a cluster-specific bearer establishment request (Trunking Default Bearer Setup Request and TrunkingDedicated Bearer Setup Request(s)) message, instructing it to allocate downlink shared radio resources in the included cells.

Create cluster default bearer establishment request message carries group number, cluster default bearer QoS parameters, cluster default bearer S-GW S1-TEID corresponding to each E-eNodeB, multicast IP address; create cluster-specific bearer The establishment request message includes the cluster-specific bearer QoS parameters, the S-GW S1-TEID of the cluster-specific bearer corresponding to each E-eNodeB, and the multicast IP address.

Step 316, each E-eNodeB in the E-eNodeB list creates a cluster default bearer establishment request and creates a cluster default bearer QoS parameter in the dedicated bearer establishment request message and maps the cluster specific bearer QoS parameter to radio bearer QoS After setting the parameters, the downlink shared radio resources are allocated by the radio bearer QoS parameters.

Step 317, after the downlink shared radio resources are allocated, each E-eNodeB performs the following two steps in parallel:

Step 3171: Notify the service receiving user terminal of the allocated downlink shared radio resources. That is, each E-eNodeB periodically broadcasts a service notification message in each cell it contains, and the message carries the allocated downlink shared radio resource description, multicast IP address, group number, and security-related configuration information. After receiving the service notification message, the service receiving terminal performs configuration according to the downlink shared radio resource description in the service notification message, and joins the cluster service session.

Step 3172, each E-eNodeB in the E-eNodeB list sends a cluster default bearer setup response and a dedicated bearer setup response (Trunking Default Bearer SetupResponse and Trunking Dedicated Bearer setup Response(s)) message to the eMME; create a cluster The default bearer setup response message carries the group number and the E-NodeB S1-TEID of the default bearer of the downlink cluster allocated by the E-eNodeB, and the dedicated bearer setup response message carries the group number and the E-NodeB allocated E-NodeB S1-TEID. The E-eNodeB S1-TEID that is exclusively carried by the downlink cluster.

Step 318: After the eMME receives the Create Cluster Default Bearer Establishment Response and Create Dedicated Bearer Establishment Response message, it sends an update cluster default bearer request and a cluster-specific bearer request to the S-GW (Update Trunking Default Bearer Request and Create Trunking Dedicated BearerRequest(s)) message to establish the S1 bearer of the downlink cluster default bearer and the cluster-specific bearer. Update the E-NodeBS1-TEID carrying the group number and the default bearer of the downlink cluster in the cluster default bearer request message; eNodeB S1-TEID, E-eNodeB list.

Step 319, after the S-GW receives the update cluster default bearer request and the cluster-specific bearer request message, record the mapping relationship between the E-eNodeB S1-TEID and the S-GW S1-TEID that the downlink cluster default bearer bears, And send an update cluster default bearer request message (Update Trunking DefaultBearer Response) message to the eMME to confirm that the establishment of the S1 bearer of the downlink cluster default bearer is completed.

So far, the establishment of the radio bearer and the S1 bearer of the cluster default bearer of the service receiving user terminal is completed.

At the same time, the S-GW records the mapping relationship between the E-eNodeB S1-TEID and the S-GWS1-TEID for the dedicated bearer of the downlink cluster, completes the establishment of the S1 bearer for the dedicated bearer of the downlink cluster, and targets the Each E-eNodeB allocates the S-GWS5/S8-TEID of the downlink cluster-specific bearer, and sends it to the eP-GW through the Create Trunking Dedicated BearerResponse(s) message.

The eP-GW records the mapping relationship between the S-GW S5/S8-TEID and the eP-GWS5/S8-TEID of the downlink cluster-specific bearer, and completes the establishment of the S5/S8 bearer dedicated to the downlink cluster.

The radio bearer, S1 bearer and S5/S8 bearer included in the cluster-specific bearer of the service receiving user terminal are established. The establishment of the downlink bearer of the cluster service session is completed.

At this point, the bearer of the cluster service session within the group is established.

Step 320, as long as the eMME confirms that it has received the confirmation message returned by any E-eNodeB in the E-eNodeB list, and confirms that the E-eNodeB of the returned message has established a service with the S-GW to send the user terminal cluster default bearer and cluster specific If there is an S1 bearer, the eMME sends a Trunking Service Floor Grant (Trunking Service Floor Grant) message to the E-eNodeB where the service sending user terminal is located, prompting the service sending user terminal to send multimedia services. The trunking service authorization message carries at least the group number , multicast IP address and other information.

Step 321, while executing step 320, the eMME receives the cluster default bearer setup response and the cluster-specific bearer setup response (TrunkingDefault Bearer Setup Response and Trunking Dedicated Bearer Setup Response ( s)) After the message, the eMME sends a service alert message (Trunking Service Alert With Information) to the E-eNodeB, and the service alert message carries at least parameters such as the group number and the service sending user terminal number.

After the service receiving user terminal receives the service prompt information message sent by the E-eNodeB, it rings and displays the service sending user terminal number and group number, and the cluster service session in this group is established.

In the subsequent communication process, for other E-eNodeBs in the E-eNodeB list, when the eMME receives the cluster default bearer establishment response and cluster dedicated bearer establishment response messages sent by these E-eNodeBs, and completes the corresponding cluster default bearer The bearer and the S1 bearer of the cluster-specific bearer are established, and then service notification information is sent to the service receiving user terminals under these E-eNodeBs.

For a service receiving terminal, the E-eNodeB transmits downlink data to each service receiving terminal by broadcasting.

In the present invention, the eMME initiates the cluster default bearer according to the cluster default QoS information, sends the service type requested by the user terminal and the predefined PPC rules by the service, and establishes one or more cluster-specific bearers. Not only the cluster default bearer can transmit multimedia data stream, but also the cluster-specific bearer can transmit multimedia data stream, thus meeting the bandwidth, rate, delay and real-time requirements of multimedia services in the group and ensuring real-time transmission of multimedia services. In addition, in the technical solution of the present invention, the uplink signaling and downlink signaling are processed in parallel, and the digital trunking communication system allocates resources for the service sending user terminal and the service receiving user terminal at the same time, which greatly reduces the number of trunking services in the group. The time the session was established. Thus, real-time transmission of high-speed multimedia services within the group is realized.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (12)

1. a method that realizes that multimedia service in broadband digital cluster group transmits in real time is characterized in that, the method comprises:

A, the professional user terminal that sends is to network subsystem signalling of bouquet multimedia service request message, request sends multimedia service to designated group, network subsystem is by cluster default bearer qos parameter, professional enhancing base station E-eNodeB and the E-eNodeB tabulation that sends the user terminal place, in group, set up the S5/S8 carrying of the cluster default bearer of up link and down link, obtain cluster dedicated bearing qos parameter by the predefined strategy of type of service request and charging control PCC rule, and in group, initiate the foundation of cluster dedicated bearing, while execution in step B and step C according to cluster dedicated bearing qos parameter;

B, in up link, digital clustering communication system is according to cluster default bearer qos parameter, cluster dedicated bearing qos parameter and the professional E-eNodeB that sends the user terminal place, set up professional radio bearer and the S1 carrying that sends the cluster default bearer of user terminal, and professional radio bearer, the S1 carrying and S5/S8 carrying that sends the cluster dedicated bearing of user terminal;

C, in down link, digital clustering communication system receives user terminal for the business that belongs to same residential quarter in this group service session, tabulation according to E-eNodeB composition in user place in cluster default bearer qos parameter, cluster dedicated bearing qos parameter and the group, set up professional radio bearer and the S1 carrying that receives the cluster default bearer of user terminal, and professional radio bearer, the S1 carrying and S5/S8 carrying that receives the cluster dedicated bearing of user terminal;

In D, the up link, send user terminal and by cluster default bearer and cluster dedicated bearing multi-medium data is sent to enhanced packet data network gateway eP-GW place in the network subsystem, in the down link, multimedia data stream is sent to professional receive user terminal by cluster dedicated bearing and cluster default bearer with multimedia data stream by the eP-GW place.

2. the method that transmits in real time of described realization multimedia service in broadband digital cluster group according to claim 1 is characterized in that,

In the described steps A, network subsystem further comprises after receiving described Cluster Multimedia business request information,

Network subsystem is to the described professional subscriber terminal authority that sends, and after described professional transmission subscriber terminal authority passed through, the S5/S8 that then sets up the cluster default bearer of described up link and down link carried; Otherwise, process ends.

3. the method that transmits in real time of described realization multimedia service in broadband digital cluster group according to claim 1 is characterized in that,

Further comprise before the described steps A, the described professional user terminal that sends judges whether self is in state connected to the network, if the professional user terminal that sends determines self to be in state connected to the network, then direct enhancement mode mobile management entity eMME in network subsystem sends described Cluster Multimedia business request information; Otherwise then described professional user terminal initiating random access procedure and the radio resource control RRC connection procedure of sending send described Cluster Multimedia business request information to eMME.

4. the method that transmits in real time of described realization multimedia service in broadband digital cluster group according to claim 1 is characterized in that,

In the described steps A, described S5/S8 carrying of setting up the cluster default bearer of up link and down link, and in group, initiate the foundation of described cluster dedicated bearing according to cluster dedicated bearing qos parameter, specifically comprise:

After eMME receives described Cluster Multimedia business request information, send professional E-eNodeB, E-eNodeB tabulation, type of service and the cluster default bearer qos parameter that sends the user terminal place to gateway S-GW;

S-GW is by cluster default bearer qos parameter Resources allocation, and for the E-eNodeB at business transmission user terminal place and each E-eNodeB distribution cluster default bearer S-GWS5/S8-TEID in the E-eNodeB tabulation, send E-eNodeB, E-eNodeB tabulation, cluster default bearer S-GW S5/S8-TEID, type of service and the cluster default bearer qos parameter at professional transmission user terminal place with backward eP-GW;

EP-GW is by cluster default bearer qos parameter Resources allocation, and for the E-eNodeB at business transmission user terminal place and each E-eNodeB distribution cluster default bearer eP-GWS5/S8-TEID in the E-eNodeB tabulation, eP-GW asks predefined strategy and charging control PCC rule by type of service to eHSS, and eP-GW is according to PCC regular allocation cluster dedicated bearing qos parameter, and for the E-eNodeB at business transmission user terminal place and each E-eNodeB distribution cluster dedicated bearing eP-GW S5/S8-TEID in the E-eNodeB tabulation, return cluster default bearer qos parameter with backward S-GW, cluster dedicated bearing qos parameter, cluster default bearer eP-GW S5/S8-TEID and cluster dedicated bearing eP-GWS5/S8-TEID;

The S-GW record traffic sends user terminal and the professional cluster default bearer S-GWS5/S8-TEID of user terminal and the mapping relations of eP-GW S5/S8-TEID of receiving, and the S5/S8 carrying of the cluster default bearer of described up link and down link is set up.

5. the method that transmits in real time of described realization multimedia service in broadband digital cluster group according to claim 1 is characterized in that,

Among the described step B, set up the radio bearer of described cluster default bearer and the radio bearer of cluster dedicated bearing and comprise,

EMME is sent to the professional E-eNodeB that sends the user terminal place with cluster default bearer qos parameter and cluster dedicated bearing qos parameter;

The professional E-eNodeB that sends the user terminal place is mapped as respectively the radio bearer qos parameter with cluster default bearer qos parameter and cluster dedicated bearing qos parameter, sets up the radio bearer of described cluster default bearer and the radio bearer of cluster dedicated bearing by the radio bearer qos parameter.

6. the method that transmits in real time of described realization multimedia service in broadband digital cluster group according to claim 1 is characterized in that,

In the described steps A, after the S5/S8 of the cluster default bearer of described up link and down link carrying is set up, also comprise

S-GW sends the E-eNodeB at user terminal place for business and each E-eNodeB in the E-eNodeB tabulation distributes cluster default bearer S-GW S1-TEID and cluster dedicated bearing S-GW S1-TEID, and cluster default bearer S-GW S1-TEID and cluster dedicated bearing S-GW S1-TEID are sent to eMME;

Among the described step B, set up the S1 carrying of described cluster default bearer, the S1 carrying of cluster dedicated bearing and the S5/S8 carrying of cluster dedicated bearing and comprise,

E-eNodeB sends cluster default bearer E-eNodeB S1-TEID and the cluster dedicated bearing E-eNodeB S1-TEID that self distributes to eMME;

EMME transmits cluster default bearer E-eNodeB S1-TEID and cluster dedicated bearing E-eNodeBS1-TEID to S-GW, the mapping relations of S-GW record clustering default bearer S-GW S1-TEID and E-eNodeBS1-TEID, the S1 carrying of described cluster default bearer is set up; The mapping relations of record clustering dedicated bearing S-GW S1-TEID and E-eNodeB S1-TEID, the S1 carrying of described cluster dedicated bearing is set up; S-GW distributes cluster dedicated bearing S-GW S5/S8-TEID for the E-eNodeB that business sends the user terminal place, and is sent to eP-GW;

The mapping relations of eP-GW record clustering dedicated bearing eP-GW S5/S8-TEID and S-GW S5/S8-TEID, the S5/S8 carrying of described cluster dedicated bearing is set up.

7. the method that transmits in real time of described realization multimedia service in broadband digital cluster group according to claim 1 is characterized in that,

Among the described step C, described foundation specifically comprises,

Each E-eNodeB signalling of bouquet default bearer qos parameter and cluster dedicated bearing qos parameter during eMME tabulates to E-eNodeB;

E-eNodeB distributes cluster default bearer radio bearer resources according to cluster default bearer qos parameter, and distribution cluster default bearer E-eNodeB S1-TEID, and according to cluster dedicated bearing qos parameter distribution cluster dedicated bearing radio bearer resources, and distribute cluster dedicated bearing E-eNodeB S1-TEID, be sent to eMME;

EMME transmits cluster default bearer E-eNodeB S1-TEID and cluster dedicated bearing E-eNodeB S1-TEID to S-GW, the mapping relations of S-GW record clustering default bearer S-GW S1-TEID and cluster default bearer E-eNodeB S1-TEID, the S1 carrying of described cluster default bearer is set up; The mapping relations of record clustering dedicated bearing S-GW S1-TEID and cluster dedicated bearing E-eNodeB S1-TEID, the S1 carrying of described cluster dedicated bearing is set up; And for each E-eNodeB distribution cluster dedicated bearing S-GW S5/S8-TEID in the E-eNodeB tabulation, and be sent to eP-GW;

EP-GW is by the mapping relations of cluster record clustering dedicated bearing eP-GW S5/S8-TEID and cluster dedicated bearing S-GW S5/S8-TEID, and the S5/S8 of described cluster dedicated bearing carries foundation.

8. the method that transmits in real time of described realization multimedia service in broadband digital cluster group according to claim 7 is characterized in that,

Behind each E-eNodeB signalling of bouquet default bearer qos parameter and cluster dedicated bearing qos parameter during described eMME tabulates to E-eNodeB, further comprise, E-eNodeB is mapped as respectively the radio bearer qos parameter with cluster default bearer qos parameter and cluster dedicated bearing qos parameter, shares Radio Resource by radio bearer qos parameter allocation of downlink;

The E-eNodeB informing business receives the shared Radio Resource of down link that user terminal distributes, and finishes the radio bearer of described cluster default bearer and cluster dedicated bearing and sets up.

9. the method that transmits in real time of described realization multimedia service in broadband digital cluster group according to claim 1 is characterized in that,

After the described step C, further comprise before the described step D, determine that the cluster carrying of up link and down link is set up, specifically comprise:

EMME receives the affirmation message that the arbitrary E-eNodeB in the E-eNodeB tabulation returns, and described E-eNodeB sets up the professional S1 carrying that sends cluster default bearer and the cluster dedicated bearing of user terminal with S-GW.

10. the method that transmits in real time of described realization multimedia service in broadband digital cluster group according to claim 9 is characterized in that,

After the cluster carrying foundation of described definite up link and down link, further comprise before the step D,

Network subsystem sends service authorization message to the described professional user terminal that sends, and sends service informing information to the described professional user terminal that receives.

11. the method that transmits in real time to the described realization multimedia service in broadband digital cluster group of 10 any one according to claim 1 is characterized in that,

Described step D specifically comprises, in the up link, the described professional E-eNodeB that user terminal is sent to multi-medium data by the radio bearer of cluster default bearer and cluster dedicated bearing professional transmission user terminal place that sends, multimedia data stream is sent to S-GW by the S1 carrying of cluster default bearer and cluster dedicated bearing, and the S5/S8 by cluster default bearer and cluster dedicated bearing carries the eP-GW place that is sent in the network subsystem again; In the down link, multimedia data stream is sent to S-GW by the S5/S8 carrying of cluster default bearer and cluster dedicated bearing, S1 carrying by cluster default bearer and cluster dedicated bearing is sent to each E-eNodeB in the E-eNodeB tabulation with multimedia data stream again, multimedia data stream is sent to the described professional user terminal that receives again.

12. the real-time method that transmits of described realization multimedia service in broadband digital cluster group is characterized in that according to claim 11,

In the up link, when multimedia data stream is sent to eP-GW, eP-GW mapping and copy the multimedia data stream of receiving, in down link, eP-GW is sent to S-GW with the S5/S8 carrying of described multimedia data stream by described cluster dedicated bearing again.

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