WO2013082941A1

WO2013082941A1 - Dynamic service reorganization method and broadband digital cluster system

Info

Publication number: WO2013082941A1
Application number: PCT/CN2012/078456
Authority: WO
Inventors: 陈晔; 李群
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-12-08
Filing date: 2012-07-11
Publication date: 2013-06-13
Also published as: CN103167421A

Abstract

A dynamic service reorganization method and a broadband digital cluster system, the method being used in a broadband digital cluster system based on time division-synchronous code division multiple access long term evolution (TD-LTE), and comprising: after receiving a dynamic reorganization request, a cluster scheduling and management center authorizes the object initiating the request and an operation object carried in the request, the dynamic reorganization request also carrying operation indicating information; after the authorization is approved, the cluster scheduling and management center initiates a user group information updating request to a mobility management entity (MME), the updating request carrying the identification information of all users in the group involved in the operation; after receiving the user group information updating request, the MME notifies the corresponding user in a cluster paging manner to update the user group information. The present invention achieves dynamic reorganization with the least modifications to the standard protocol, and is an important component in a broadband digital cluster system based on the TD-LTE.

Description

Method for realizing dynamic reorganization business and broadband digital cluster system

Technical field

The present invention relates to the field of wireless communications, and in particular, to a method for implementing a state reassembly service and a broadband digital trunking system.

Background technique

The trunking communication system is a dedicated wireless communication system developed for industrial users' command and dispatching needs for specific industry applications. A large number of wireless users share a small number of wireless channels in the system, and the command and dispatch is the main application. It is a multi-purpose and high-efficiency system. Wireless communication system. The trunking communication system has a wide application market in the fields of government departments, public safety, emergency telecommunications, electric power, civil aviation, petrochemicals and military.

Become the development trend of the entire wireless communication system. Correspondingly, the trunking communication system will also be developed in the direction of system IP, service diversification, data broadband, and terminal multi-mode.

The trunking communication system communicates in a half-duplex mode. When working, the Push To Talk (PTT) key controls the acquisition and release of the channel, the channel utilization rate is high, and the call connection is fast; the users in the group share the downlink channel. High resource utilization. Moreover, the trunking communication system can guarantee the privacy and security of the call through voice encryption; preferentially allocate channels for high-priority users or services; ensure emergency communication through fault weakening function; realize flexible multi-level grouping through dynamic reorganization Dispatching command function. In general, broadband digital trunking communication systems should have the following characteristics in terms of service, functionality, and performance requirements:

1. Business characteristics

Basic broadband service types of broadband trunking communication systems, including: group call/visual group call, single call/visible single call, emergency call and other voice services; mobile information service, high speed data query, web browsing, mobile office, positioning Data services such as services; video services such as video conferencing and mobile video surveillance.

2, functional characteristics It has fast command and dispatch capability such as group call and direct call; it integrates voice, data, image and video multi-service transmission capabilities; has network interconnection and off-network communication capabilities to support direct or terminal construction of Mesh networks (wireless mesh networks), etc. .

3, performance characteristics

High network reliability, strong fault weakening and anti-destructive capability; support for large traffic capacity in hotspots and hotspots; short call setup time, single system call setup time less than 500ms; high network security, end-to-end support Encryption; wide coverage, low network construction costs. Among them, call setup time, network reliability and security are the three most important technical indicators.

TD-LTE (TD-SCDMA Long Term Evolution) technology system uses Orthogonal Frequency Division Multiple (OFDM) and Multiple Input Multiple Output (Multiple Input Multiple Output) As a standard for the evolution of wireless networks, MIMO technology has the advantages of large channel capacity, high spectrum utilization, and strong anti-interference ability, which can not only meet the needs of broadband trunking communication networks in terms of capacity, rate and spectrum efficiency. And in the autonomy of system development, it also has the advantages that other broadband wireless technologies can't match. The development of a broadband digital trunking communication system based on TD-LTE technology is conducive to the construction of an efficient and practical command and dispatch system.

At present, the air interface protocol design of the TD-LTE system is mainly for the point-to-point unicast communication mechanism and the Multimedia Broadcast Multicast Service (MBMS) communication mechanism, which is not fully applicable to point-to-multiple for group users. Point half-duplex communication mechanism. However, the cluster group call downlink multicast transmission and the eMBMS (enhanced MBMS) session service downlink multicast feature are similar, and the cluster group call can be regarded as a session. Therefore, the eMBMS technology is used to implement the multicast function. In conjunction with the existing functions of TD-LTE network elements and protocol flows, a new point-to-multipoint cluster communication mechanism based on the original air interface protocol can be implemented to meet the needs of digital broadband trunking communication.

As shown in Figure 1, the TD-LTE-based digital broadband trunking system is deployed on the TD-LTE eMBMS application. The cluster application system uses the PDN (Public Data Network) gateway and the eMBMS service layer network element eBM. -SC connection. The eBM-SC (Evolved Broadcast-Multicast Service Centre) serves as the source of data multicast, and provides aggregation and transmission of services, user authorization, initiation of bearer establishment, and session control. The PDN gateway provides the cluster service request session to the eBM-SC for control. The eMBMS-based cluster session is different from the traditional session service in that it has both an uplink data link and a downlink multicast data link. And the uplink is simplex. Only one user in a group call/visible group call has an uplink, and other users in the group share a downlink. The downlink is shared within the uplink mapping group of the voice user on the eMBMS architecture. That is, the voice data carried by the S1-U interface is transmitted to the eBM-SC through the application layer of the IMS (IP Multimedia Subsystem, IP Multimedia System), and the eBM-SC serves as the source of the multicast to aggregate and transmit the service to the MBMS-GW (MBMS Gate). The Way, MBMS gateway) is then transmitted by the MBMS-GW to the eNodeB (Evolved Node B, referred to as eNB) via the M1-U interface.

The group call service is the basic service in the cluster system. The so-called group includes a static group and a dynamic group, and the static group is transmitted and managed by the corresponding scheduling management server, and is a preset group information (including terminal information). In practical applications, some group members need to join temporary or urgent tasks, and need to join other pre-defined groups to form a new group; after the task processing ends, these group members exit the group again. , revert back to the original group state, which is the function of dynamic reorganization. How to implement dynamic reorganization based on the architecture shown in Figure 1 is a problem that must be considered in a cluster communication system.

Summary of the invention

The object of the present invention is to provide a method for implementing a dynamic reassembly service and a broadband digital cluster system to overcome the shortcomings of the existing TD-LTE-based broadband digital trunking system that cannot be dynamically reorganized.

To solve the above problem, the present invention provides a method for implementing a dynamic reassembly service, which is applied to a broadband digital trunking system based on Time Division Synchronous Code Division Multiple Access Long Term Evolution (TD-LTE), including: a cluster scheduling management center receives After the dynamic reorganization request, the user initiating the request and the user in the operation object carried in the request are authenticated; wherein the dynamic reorganization request further carries operation indication information; after the authentication is passed, the cluster The scheduling management center initiates a group user information update request to the mobility management entity (MME), where the identifier information of all users in the group involved in the current operation is carried; After receiving the group user information update request, the MME notifies the corresponding user to update the user group information by means of cluster paging.

Preferably, the object for initiating the dynamic reorganization request is a wired dispatching station, a wireless dispatching station or a user terminal having a super terminal authority in the group.

Preferably, the method further includes: sending, by the MME, a group session update request to an evolved Node B (eNB);

And the eNB starts the process of group session update according to the received group session update request, and updates the radio access bearer.

Preferably, the method further includes: after learning that the radio access bearer update is completed, the MME returns a group user information update response to the cluster scheduling management center.

Preferably, the process for the eNB to initiate a group session update according to the received group session update request includes:

And the eNB establishes a downlink MBMS E-RAB bearer for the reorganized group session according to the QoS parameter of the bearer carried in the group session update request;

And if the group session update request further includes an uplink bearer indication, the eNB further establishes an uplink enhanced radio access bearer for the right user.

Preferably, the method further includes: after detecting the paging on the network side, the user equipment initiates a radio resource control (RRC) connection request to the serving eNB, and after establishing a signaling connection with the core network, acquiring the local end corresponding to the Dynamically reorganize the information, update the group session subscription information on this side, and detect and start a new group session.

Correspondingly, the present invention also provides a broadband digital trunking system based on Time Division Synchronous Code Division Multiple Access Long Term Evolution (TD-LTE), including:

The cluster scheduling management center is configured to: after receiving the dynamic reorganization request, authenticating the object that initiates the request and the user in the operation object carried in the request; wherein the dynamic reorganization request further carries an operation instruction After the authentication is passed, a group user information update request is initiated to the mobility management entity (MME), where the identifier information of all users in the group involved in the operation is carried;

The MME is configured to: after receiving the group user information update request, by using a cluster paging The way to notify the corresponding user to update the user group information.

Preferably, the originating object of the dynamic reorganization request is a wired dispatching station, a wireless dispatching station or a user terminal having a super terminal authority in the group.

Preferably, the broadband digital trunking system further includes: an evolved Node B (eNB); the MME is further configured to: send a group session update request to the eNB;

The eNB is configured to: start a group session update according to the received group session update request, and update the radio access bearer.

Preferably, the MME is further configured to: after learning that the radio access bearer update is completed, return a group user information update response to the cluster scheduling management center.

Preferably, the eNB is configured to: initiate a process of group session update according to the received group session update request, including:

Establishing a downlink MBMS E-RAB for the reassembled group session according to the quality of service parameter of the bearer carried in the group session update request;

When the group session update request carries the uplink bearer indication, the uplink enhanced radio access bearer is established for the right user.

Preferably, the broadband digital trunking system further includes: a user equipment;

The user equipment is configured to: after detecting the paging on the network side, initiate a radio resource control (RRC) connection request to the serving eNB, and after establishing a signaling connection with the core network, obtain the dynamic reorganization information corresponding to the local end, and update the local The group session subscription information on the side detects and starts a new group session.

In the embodiment of the present invention, a TD-LTE NAS (Network Access Server, network access server) and Ml, M2, M3 and other related protocols are extended, and a method for realizing dynamic reorganization of a broadband digital trunking system based on TD-LTE is realized. . BRIEF abstract

Figure 1 is a network structure diagram of a digital broadband cluster system based on TD-LTE;

2 is a basic flowchart of dynamic reorganization initiated from a cable dispatching station according to an embodiment of the present invention; The basic process.

Preferred embodiment of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

This embodiment provides a method for dynamic reassembly to implement dynamic reassembly in a TD-LTE based wideband digital cluster system. A cluster scheduling management center is added at the application layer of the system, and the cluster scheduling management center can be a cluster application server. The process of dynamic reorganization may be initiated by a wired dispatching station, a wireless dispatching station, or a user terminal having a super terminal authority in the group; wherein the dynamic reorganization process initiated by the wireless dispatching station and the user terminal having the super terminal authority in the group is completely consistent. The so-called user terminal with the permission of the HyperTerminal means that several users in the group obtain the authorization of the super user through the subscription configuration, have the read permission for the partial group call information, and can also understand the basic information of other users or groups in the cluster. And a user terminal capable of initiating a dynamic reorganization request.

The implementation process of the dynamic reorganization business can be roughly divided into the following three stages:

1. The wired terminal, the wireless dispatching station, or the user terminal having the super terminal authority in the group initiates a dynamic reorganization request to the cluster scheduling management center, where at least the operation indication information and the identification information of the operation object for the current operation are carried; The value of the indication information is used to indicate that a user needs to be added to an existing group, a user is deleted, a plurality of groups are temporarily merged into one group, or a temporarily merged group is split, and the operation object is the reorganization operation. The group involved, or the group and user involved in the reorganization operation;

2. After receiving the dynamic reorganization request, the cluster scheduling management center authenticates the object that initiated the request and the user in the operation object carried in the request. The cluster scheduling management center is responsible for the storage and rights management of the user group information, and is responsible for interacting with the PDN gateway to initiate cluster session control, which is a control node of the cluster service;

3. After the authentication is passed, the cluster scheduling management center initiates a group user information update request to the MME (Mobility Management Entity) through the eBM-SC and the MBMS-GW, where the group user information update request is carried. In the group involved in this operation The identification information of all users; the MME notifies the corresponding user to update the user group information by means of cluster paging according to the received request;

The MME sends a group session update request to the eNB, where the request carries at least the identification information of the cluster group involved in the reorganization operation and the QoS (Quality of Service) parameter of the bearer to be established; If the eNB is the serving eNB of the current call right user, the group session update request further includes an uplink bearer indication.

5. The process of starting the group session update after the eNB receives the group session update request, including: the eNB establishes a downlink MBMS E-RAB (Evolved Radio Access Bearer) bearer for the reorganized group session, if After receiving the uplink bearer indication, the received group bearer update request also needs to establish an uplink E-RAB bearer of the call right user; after learning that the radio access bearer update is completed, the MME returns the group to the cluster scheduling management center. User information is more responsive.

After the UE detects the paging on the network side, the UE initiates an RRC (Radio Resource Control) connection request to the serving eNB. After establishing a signaling connection with the core network, the UE obtains dynamic reorganization from the MBMS-GW through the eNB. Information, update the group session subscription information on this side, detect and start a new group session. The dynamic reassembly information of the UE is information that changes in the user group information of the UE due to the reorganization operation.

Preferably, the eBM-SC is a session control root and aggregation point, and is responsible for controlling forwarding and bearer address aggregation.

In this implementation, the TD-LTE based broadband digital trunking system includes:

The cluster scheduling management center is configured to: after receiving the dynamic reorganization request, authenticate the object that initiates the request and the user in the operation object carried in the request; wherein the dynamic reorganization request further carries the operation indication information; The method further includes: after the authentication is passed, initiating a group user information update request to the mobility management entity (MME), where the identifier information of all users in the group involved in the current operation is carried;

After receiving the group user information update request, the MME notifies the corresponding user to update the user group information by means of cluster paging.

Preferably, the object that initiates the dynamic reorganization request is a wired dispatching station, a wireless dispatching station or a group A user terminal with HyperTerminal permissions in the group.

Preferably, the broadband digital trunking system further includes: an evolved Node B (eNB); the MME is further configured to send a group session update request to the eNB;

The eNB is further configured to update the radio access bearer according to the received process of starting the group session update according to the group session update request.

Preferably, the MME is further configured to return a group user information update response to the cluster scheduling management center after learning that the radio access bearer update is completed.

Preferably, the process for the eNB to start a group session update according to the received group session update request includes:

The eNB is configured to establish a downlink MBMS E-RAB bearer for the reorganized group session according to the QoS parameter of the bearer carried in the group session update request.

The eNB is further configured to: when the group session update request further carries an uplink bearer indication, establish an uplink enhanced radio access bearer for the right user.

The user equipment is configured to initiate radio resource control to the serving eNB after detecting the paging on the network side.

(RRC) connection request, after establishing a signaling connection with the core network, obtain dynamic reorganization information corresponding to the local end, update the group session subscription information of the local side, and detect and start a new group session.

According to the method in this embodiment, the dynamic reorganization process needs to extend related messages on interfaces such as NAS and M2 and M3.

Group session update request involved in the M3 interface between the MME and the MCE interface

(MBMS SESSION UPDATE REQUEST), the group session update response (MBMS SESSION UPDATE RESPONSE) message is extended, and the expanded message structure is shown in Table 1 and Table 2.

Content of the MBMS SESSION UPDATE REQUEST message

MCE MBMS M MCE entity MBMS M3 interface identifier M3AP ID

TMGI M cluster service group ID

MBMS Session 0 MBMS Session ID

Identity

MBMS E-RAB M MBMS E-RAB bears Qos parameters

QoS parameters

MBMS Session M MBMS task cycle

Duration

MBMS Service 0 MBMS Service Area

Area

Minimum Time to M MBMS Minimum Data Transfer Time

MBMS Data

Transfer

TNL Information 0 transport layer information

>IP Multicast M Multicast IP Address

Address

>IP Source M source IP address

Address

>GTP DL TEID M Downstream GTP Tunnel Identification

Table 2 Contents of the MBMS SESSION UPDATE RESPONSE message Information element Cycle number Comment

Message Type M message type

MME MBMS M MME entity MBMS M3 interface identifier

M3AP ID

MCE MBMS M MCE entity MBMS M3 interface identifier

M3AP ID

Criticality 0

Diagnostics

The group session update request message and the group session update response message involved in the M2 interface between the MCE and the eNB are extended, and the extended message structure is as shown in Table 3 and Table 4. Content of the MBMS SESSION UPDATE REQUEST message

The following dynamic reorganization request, dynamic reorganization request confirmation, group user information update request, and group user information update response message are added to the NAS between the UE and the MME, and the structure of each newly added message is as shown in Table 5 to Table 8. Show.

Table 5 Contents of the dynamic reorganization request message

Table 6 Contents of the dynamic reorganization request confirmation message

Table 7 Contents of the group user information update request

Table 8 Contents of the group user information update response Information element Number of loops Comments

Protocol

1 protocol identification discriminator

According to different NEs that initiate dynamic reorganization, the scenarios of dynamic reorganization can be divided into two types. The dynamic reorganization process initiated by the cable scheduling station is shown in Figure 2:

1) The wired dispatching station sends a dynamic reorganization request message to the cluster scheduling management center through a D-GW (Dispatch Gateway) and a PDN gateway (Packet Data Network SGW), and the operation indication information in the message Fields can be set to "Create Temporary Group", "Add Group", "Add User", "Remove Temporary Group", "Delete Group" or "Delete User";

2) The cluster scheduling management center interacts with the Home Subscriber Server (HSS) to authenticate the wired dispatching station that sends the dynamic reorganization request and the user that needs to be dynamically reorganized. If the authentication fails, the cluster scheduling management The center rejects the dynamic reorganization request of the wired dispatching station; if receiving, modifies the group session subscription information of the corresponding user; in this process, an information update status identifier needs to be set for each reorganized user terminal, and is used to identify the reassembled user terminal. Whether the information is updated; if the dynamic reorganization is "create temporary group" or "add group", the group will be assigned a group number; wherein, the temporarily created group can be assigned a temporary group number, which is new The added group is assigned a permanent group number;

3) The cluster scheduling management center sends a dynamic reorganization request confirmation message to the D-GW through the PDN gateway, and the D-GW returns a dynamic reorganization request confirmation message to the wired dispatching station;

4) The cluster scheduling management center initiates a group user information update request to the MME through the eBM-SC and the MBMS-GW;

After receiving the group user information update request, the MME sends a group paging message to the UE through the eNB, and the paging needs to participate in the recombined UE;

6) The UE that needs to participate in the reassembly initiates an RRC connection request to the eNB after detecting the paging message; After the RRC connection is established, the dynamic reassembly information of the UE is obtained by using the downlink direct transmission message. The information may include the group session subscription information of the local end, and may also include the identification information of the group where the UE is currently located, and the group. Other information such as identification information of other users in the group. After receiving the dynamic group information, the UE may update the group session subscription information on the local side.

7). The MBMS-GW sends a group session update request message to the MCE through the MME to start updating the group session process;

8) The MCE sends an update group user session request to the eNB;

9). The eNB starts the group session update process, and the eNB establishes the downlink MBMS E-RAB bearer of the reorganized group session. If the eNB is the serving eNB of the dissident user, the uplink E-RAB bearer needs to be established for the dispatched user. Finalizing the update of the radio access bearer;

10) The eNB returns a group session update response to the MCE;

11) The MCE replies to the group session update response to the MBMS-GW through the MME, and ends the process of updating the group session;

The MBMS-GW notifies the users in the cluster group to update the configuration information, wherein the configuration information includes the IDs of the users involved in the updated group, and the TNL corresponding to the users is recorded.

Information, MBMS E-RAB QoS parameters, TMGI and other information;

13) The MME replies with the group user information update response to the cluster scheduling management center through the MBMS-GW, and the dynamic reorganization process ends.

If the dynamic reassembly request is initiated from a wireless dispatcher or a superuser within a group, the supervisor in the wireless dispatcher or group must be authorized to subscribe to become a authorized user, and then dispatched to the cluster through the MME and MBMS-GW. The management center sends a dynamic reorganization request, and after receiving the dynamic reorganization request, the cluster scheduling management center authenticates the wireless dispatching station or the superuser in the group and the user who needs to be dynamically reorganized, and then initiates the attack from the wired dispatching station. The dynamic reorganization process is similar. The dynamic reassembly process initiated by the wireless dispatcher and the user terminal having the HyperTerminal rights in the group is as shown in FIG. 3, including:

301. The super-user in the wireless dispatching station or the group sends a dynamic reorganization request message to the cluster scheduling management center via the eNB, the MME, the MBMS-GW, and the PDN through the NAS direct transmission message. The action ID field in the message can be set to "Create Temporary Group", "Add Group/User", "Undo Temporary" Group " , "delete group / user", etc., and indicate the identity of the group and user that need to be reorganized;

302. The cluster scheduling management center performs monthly HSS interaction, and authenticates the wireless dispatching station or the super user dispatching station in the group that sends the dynamic reorganization request, and the user that needs to be dynamically reorganized, and if so, modify the group of the corresponding user. Session signing information; in this process, an information update status identifier needs to be set for each reassembled user terminal to identify whether the reorganized user terminal has updated the information; if the dynamic reorganization is "create a temporary group" or "Add group", the group number will be assigned to the group; wherein, the temporarily created group can be assigned a temporary group number, and the newly added group is assigned a permanent group number;

303. The cluster scheduling management center sends a group user information update request message to the MME through the MBMS-SGW;

After receiving the group user information update request message, the MME sends a group page paging message to the UE through the eNB, and the paging needs to participate in the reorganized user terminal;

305. After the UE that participates in the reassembly detects the paging message, initiates an RRC connection request to the eNB. After the RRC connection is established, the dynamic reassembly information of the UE is obtained by using the downlink direct transmission message, and the group session subscription information of the local side is updated.

306. The MBMS-GW sends a group session update request message to the MCE through the MME, and starts to update the group session process;

307. The MCE sends an update group user session request to the eNB.

308. The eNB starts a group session update process, and the eNB establishes a downlink of the reorganized group session.

The MBMS E-RAB bearer, if the eNB is the serving eNB of the dissident user, the uplink E-RAB bearer needs to be established for the call right user, and finally the radio access bearer update is completed;

309. The eNB replies to the MCE with a group session update response.

310. The MCE returns a group session update response to the MBMS-GW through the MME, and ends the process of updating the group session;

311. The MBMS-GW notifies the users in the cluster group to update the configuration information;

312. The MME replies to the cluster scheduling management center by the MBMS-GW to reply to the group user information update response; 313. The cluster scheduling management center sends a dynamic reorganization request confirmation message to the super-user in the wireless dispatching station or the group, and the dynamic reorganization process ends.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program instructing the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. In view of the present invention, various other modifications, equivalents, improvements, etc., should be made without departing from the spirit and scope of the invention. It is included in the scope of protection of the present invention.

Industrial applicability

The method is well adapted to the digital broadband cluster system based on eMBMS application. Based on the underlying protocol and architecture of TD-LTE, the dynamic reorganization function is realized by modifying the standard protocol at least. ^^ Digital broadband cluster in TD-LTE system An important part of the system.

Claims

Claim

A method for implementing a dynamic reassembly service, which is applied to a broadband digital trunking system based on Time Division Synchronous Code Division Multiple Access Long Term Evolution (TD-LTE), comprising:

After receiving the dynamic reorganization request, the cluster scheduling management center authenticates the object that initiated the request and the user in the operation object carried in the request; wherein the dynamic reorganization request further carries operation indication information; After the right is passed, the cluster scheduling management center initiates a group user information update request to the mobility management entity (MME), where the identifier information of all users in the group involved in the current operation is carried;

After receiving the group user information update request, the MME informs the corresponding user to update the user group information by means of cluster paging.

2. The method of claim 1 wherein

The object that initiates the dynamic reorganization request is a wired dispatching station, a wireless dispatching station, or a user terminal having a HyperTerminal right within the group.

3. The method according to claim 1, further comprising:

Sending, by the MME, a group session update request to an evolved Node B (eNB);

4. The method of claim 3, further comprising:

After learning that the radio access bearer update is completed, the MME returns a group user information update response to the cluster scheduling management center.

5. The method according to claim 3 or 4, wherein

And the process of starting the group session update by the eNB according to the received group session update request, including:

If the group session update request further carries an uplink bearer indication, the eNB An uplink enhanced radio access bearer is also established for the right-of-rights user.

6. The method of claim 1, further comprising:

After detecting the paging on the network side, the user equipment initiates a radio resource control (RRC) connection request to the serving eNB, and after establishing a signaling connection with the core network, obtains the dynamic reassembly information corresponding to the local end, and updates the group on the local side. Group session subscription information, detect and start a new group session.

7. A broadband digital trunking system based on Time Division Synchronous Code Division Multiple Access Long Term Evolution (TD-LTE), comprising:

The MME is configured to: after receiving the group user information update request, notify the corresponding user to update the user group information by using a cluster paging manner.

8. The wideband digital trunking system according to claim 7, wherein

The originating object of the dynamic reorganization request is a wired dispatching station, a wireless dispatching station, or a user terminal having a HyperTerminal right within the group.

9. The wideband digital trunking system of claim 7, further comprising: an evolved Node B (eNB);

The MME is further configured to: send a group session update request to the eNB;

10. The wideband digital trunking system of claim 9, wherein

The MME is further configured to: after learning that the radio access bearer update is completed, return a group user information update response to the cluster scheduling management center.

11. The wideband digital trunking system according to claim 9 or 10, wherein

The eNB is configured to: start a group session according to the received group session update request New processes, including:

The broadband digital trunking system of claim 7, further comprising: a user equipment; the user equipment is configured to: initiate a radio resource control (RRC) to the serving eNB after detecting the paging on the network side The connection request, after establishing a signaling connection with the core network, obtains the dynamic reorganization information corresponding to the local end, updates the group session subscription information of the local side, and detects and starts a new group session.