WO2013170650A1

WO2013170650A1 - Trunked service realization system and device

Info

Publication number: WO2013170650A1
Application number: PCT/CN2013/072416
Authority: WO
Inventors: 艾明; 徐晖; 王一唯; 任世岩; 蒋石竹; 焦斌; 谌丽; 王胡成; 常艳
Original assignee: 电信科学技术研究院; 大唐移动通信设备有限公司
Priority date: 2012-05-17
Filing date: 2013-03-11
Publication date: 2013-11-21
Also published as: CN103428645A; CN103428645B

Abstract

Disclosed are a trunked service realization system and device, for reducing the signaling interaction during trunked service process, reducing trunked service time delay and improving trunked service efficiency. The trunked service realization system provided by the present application comprises a TMSE and a scheduling server; the TMSE is used to convert a trunked service request message received from a user equipment (UE) into a session initiation protocol (SIP) message, and transmit the SIP message to the scheduling server; the TMSE is further used to convert the SIP message received from the scheduling server into a message identifiable for the UE, and transmit the message to the UE; the scheduling server is used to receive the SIP message transmitted by the TMSE, conduct processing according to the SIP message, and transmit the processing result to the TMSE via the SIP message.

Description

Cluster service realization system and device

The present application claims priority to Chinese Patent Application No. 201210154398.5, entitled "A Cluster Service Implementation System and Apparatus", filed on May 17, 2012, the entire contents of in.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a cluster service implementation system and apparatus. Background technique

On December 28, 2000, the Ministry of Information Industry officially released the "Digital Trunking Mobile Communication System" and recommended the use of TETRA (Terestrial Trunked Radio) and iDEN (Integrated Digital Enhanced Networks). Two systems. In the following years, GT (Global Open Trunking Architecture) based on CDMA (Code Division Multiple Access) technology and GT800 based on global mobile communication system technology were introduced.

With the rapid development of mobile Internet and the popularization of TD-LTE (Time Division - Long Term Evolution) technology, the demand for mobile communication broadband is becoming more and more obvious. The cluster system is also being oriented to IP system architecture and data broadband. Equilateral development. At the end of 2010, CCSA (China Communications Standards Association) officially approved the "Research Report on Trunking Communication System Based on TD-LTE", in which three implementation schemes based on TD-LTE broadband multimedia cluster were proposed. .

The most typical service in a trunked system is a group call service, that is, a user can initiate a call for a specific group at a certain time, and the call adopts a half-duplex mode. In the broadband multimedia system, the cluster can not only provide voice group calls for users, but also provide services such as visual group calls. The group call feature is that only one person can speak at any time, the speaker obtains uplink resources, and other users are in the receiving state. The system allocates a downlink shared channel for each cell involved in the group, and the group of users in the small area The shared channel is monitored in real time. Therefore, in the cluster group call process, there is only one uplink and one shared downlink at any time, which utilizes spectrum resources more efficiently than the public network. Another feature of the half-duplex group call is that the right to call allows for application, release, preemption, queuing, etc., and the management process of the right is closely related to the user priority. In addition, group call setup delay is one of the key indicators of cluster call. Any cluster system needs to meet the system characteristics of fast access. Here, the group call establishment delay is defined as the time when the called party presses the PTT (PUSH TO TALK) button until a called user hears the calling party's voice.

The TETRA system is a European standard. The cluster function is the most powerful, but the system equipment and user equipment are expensive. Although the air interface is open to the public, other interfaces inside the system are kept secret, and the interoperability between the equipment vendors is not high. The iDEN system is an exclusive standard and system standards are not published. Domestic narrowband digital trunking systems, such as GSM (GSM) based GSM (Global System for Mobile Communications) and CDMA-based GOTA systems, cannot communicate directly with the core network because their base stations need to be uniformly controlled by the base station controller. The signaling interaction during the group call setup process is increased, and the call setup delay is increased.

Among the three TD-LTE broadband multimedia trunking schemes proposed by CCSA, the first scheme modifies the air interface to achieve enhanced group call performance, and the second scheme recommends wireless Poc (PTT Over Cellular, cellular-based PTT). The service is enhanced to implement broadband clustering. The third solution is to use the MBMS (Multimedia Broadcast/Multicast Service) joint transmission method to achieve group call performance enhancement based on the Poc scheme. These three schemes have some drawbacks in the group call performance scheme. Although the first scheme optimizes the air interface, due to the use of the TD-LTE core network public network architecture, the core network needs to be repeatedly used among the core network in the group call establishment process. The interaction is not conducive to the shortening of the group call establishment delay; the second scheme and the third scheme both use the standard Poc service to enhance the mode, and the optimization space of the Poc service itself is limited. Although the third option uses the MBMS joint transmission scheme to optimize the air interface, the overall scheme optimization is not obvious. Summary of the invention

The embodiments of the present invention provide a cluster service implementation system and device, which are used to reduce signaling interactions in a cluster service process, reduce cluster service delay, and improve cluster service efficiency.

A device for implementing a cluster service according to an embodiment of the present invention includes:

An uplink sending unit, configured to convert the received cluster service request message from the user equipment UE into a session initial protocol SIP message, and send the SIP message to the scheduling server Server;

And a downlink sending unit, configured to convert the received SIP message from the scheduling server into a message that the UE can identify, and send the message to the UE.

A cluster service implementation apparatus provided by an embodiment of the present invention includes:

An Invite message receiving unit, configured to receive an Invite message based on a Session Initiation Protocol SIP format sent by the scheduling server, where the identifier of the calling user equipment that initiates the group call establishment request, and the called user equipment identifier are included;

The determining processing unit, according to the SIP format-based Invite message, if it is determined that the user equipment corresponding to the called user equipment identifier in the group is served by the cluster mobility session management entity TMSE where the device is located, the response user does not exist. The indication message is sent to the scheduling server; otherwise, the paging request is sent to the eNB serving the called UE. .

Receiving a SIP message unit, configured to receive a session initiation protocol SIP sent by the cluster mobility session management entity TMSE Message

SIP message processing means for ranking before the SIP message is processed, the processing result is sent to the SIP message TMSE ₀

A system for implementing a cluster service according to an embodiment of the present invention includes:

a TMSE, configured to convert the received cluster service request message from the user equipment UE into a session initiation protocol SIP message, send the SIP message to the scheduling server Server; and convert the received SIP message from the scheduling server into a UE A message that can be identified and sent to the UE;

The scheduling server is configured to receive the SIP message sent by the TMSE, process the packet according to the SIP message, and send the processing result to the TMSE through the SIP message.

In the embodiment of the present invention, the received cluster service request message from the user equipment UE is converted into a session initial protocol SIP message by the TMSE, and the SIP message is sent to the scheduling server Server; and the received SIP message from the scheduling server is received. The message is transmitted to the UE, and is sent to the UE. The SIP message sent by the TMSE is received by the scheduling server, processed according to the SIP message, and the processing result is sent to the TMSE through the SIP message, thereby reducing signaling interaction in the cluster service flow. In turn, the cluster service delay is reduced, and the cluster service efficiency is improved. DRAWINGS

1 is a schematic diagram of a network architecture of a TD-LTE broadband multimedia cluster according to an embodiment of the present invention;

2 is a schematic diagram of an overall process of a cluster user boot registration according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an overall process of establishing a group call initiated by a cluster user according to an embodiment of the present disclosure;

4 is a schematic structural diagram of a cluster service implementation apparatus on the TMSE side according to an embodiment of the present invention; FIG. 5 is a schematic structural diagram of a cluster service implementation apparatus on a TMSE side according to an embodiment of the present invention; The schematic diagram of the structure of the cluster service implementation device on the scheduling server side provided by the example. detailed description

The network architecture of the TD-LTE broadband multimedia cluster provided by the embodiment of the present invention, that is, the cluster service implementation system, as shown in FIG. 1 below, the system includes a UE (User Equipment), an e B (Evolved NodeB, an evolved base station), and a TMSE ( Trunking Mobility Session Entity, HSS (Home Subscriber Server), Scheduling Server (Server), Dispatcher, and Operations Maintenance.

Under the system architecture, the core network uses centralized thinking, and the core network device functions are unified by TMSE, TMSE Directly control all TD-LTE base station devices under the control to reduce signaling interaction during group call setup.

The function description of each network entity is given below:

A user device is a device that is directly operated by a cluster user and provides cluster services and data services to users. According to the form of connecting to the system, it is divided into two types: wireless user equipment and wired user equipment. According to the function, the wireless user equipment is further divided into a normal wireless user equipment and a wireless scheduling user equipment having a scheduling function. According to the external shape, the wireless user equipment can be further divided into a handheld user equipment, a mobile station, etc., wherein the handheld user equipment is a portable device commonly used by cluster users, providing various services for users in a mobile environment; the mobile station is installed in the vehicle, User equipment on vehicles such as ships.

The e B in the system adds the functions required to implement the cluster service based on the TD-LTE system base station (ie, eNodeB), including: transparently transmitting signaling for the cluster service between the wireless user equipment and the TMSE. And allocating radio resources for the wireless user equipment and the cluster service, and transmitting downlink data of the cluster service received from the TMSE to the wireless user equipment.

The TMSE is the main network element of the core network part of the TD-LTE cluster system. The TMSE first has the functions of the MME (Mobile Management Entity) in the LTE system, that is, implements mobility management, access control, and EPS (Evolved Packet System, Evolved packet system), such as session management; Secondly, TMSE also has the function of PDN GW (Packet Data Network Gateway) in the LTE system, that is, it is responsible for assigning IP addresses to user equipments and performing QoS (Quality of Service, Service Shield) Controls, provides and interfaces to external data networks, etc. It is important that TMSE also has cluster service related functions, including implementing SIP call signaling between the user equipment and TMSE and the SIP protocol between the TMSE and the dispatch server. Translation function, media processing function of cluster call, for example, copying and distributing downlink media data to different base stations.

In addition, TMSE also needs to have functions such as charging data collection related to cluster services.

Preferably, a TMSE entity integrates the functions of the MME, the SGW, and the PGW in the LTE network, and implements the process of the existing LTE network in an internal manner to shorten the time required by the existing process.

When the network scale is large, wide coverage is achieved through multiple TMSE networking.

The HSS is a database for storing user subscription information and also has an authentication center function. In order to support the cluster service, it is necessary to add related functions to the existing HSS functions, for example, management of group subscription data.

The scheduling server mainly performs scheduling business logic control such as cluster group call, single call, emergency call, call right management, and cluster service authority management, and can implement functions such as media surface data copying and forwarding (for multiple TMSE scenarios).

Optionally, when the language call needs to be intercommunicated with the external network, the scheduling server has a voice access gateway or a relay gateway function.

The scheduling server can implement management of cluster user data.

The dispatching console mainly provides a human-machine operation visual interface, presents information and triggers scheduling services, and is capable of emergency calls. An alarm is generated.

The operation and maintenance station supports the local operation and maintenance platform and the centralized network management. The specific functions include the security function for managing the operation and maintenance user rights. The configuration and modification function of the office data for the device network planning. The convenient operation and maintenance and the positioning of the caller for the developer. Signaling tracking function; Unified fault management for devices, providing alarm collection, display, query, fault detection, fault diagnosis and troubleshooting tools. In addition, the NE software management function for daily equipment maintenance operation management functions and system software upgrade provides traffic and signaling measurement, service shield measurement, availability measurement, throughput measurement, and switching function measurement for each network element. , provide a basis for system performance analysis and keep abreast of network operations. The operation and maintenance console also provides operation logs, access security logs, system operation logs, NE event notifications, and alarm logs for user access to the device for easy problem location. For the HSS equipment, it is also necessary to support the service provisioning platform.

The operation and maintenance station can communicate with network elements such as base stations, TMSEs, HSSs, and dispatching stations in the system to implement the transmission of operation and maintenance commands and the receipt of response messages from operation commands of the respective network elements. Due to the use of IP networking technology, only the operation and maintenance station is shown in Figure 1, and the connection relationship with each network element is shown.

The embodiments of the present invention provide a group call establishment method based on the TD-LTE broadband multimedia cluster system architecture shown in FIG. 1 , which can better shorten the group call setup delay and can Make full use of TD-LTE broadband features to provide cluster users with higher bandwidth and better service experience. In order to achieve the above objective, the technical solutions provided by the embodiments of the present invention include:

After the user equipment in the TD-LTE broadband multimedia digital trunking system is powered on, the user equipment performs network attachment and establishes a default bearer. After the connection is successful, the network device TMSE triggers the scheduling service registration process to the scheduling server. In the process, the pair is completed. Authentication authentication of the cluster user and registration authentication of the scheduling service;

When the user presses the PTT button to initiate a call for a specified group, if the calling user equipment is in the IDLE state, the calling user equipment first performs an RRC (Radio Resource Control) connection and enters the connected state. And then sending a group call establishment request to the network device TMSE through the NAS message;

After receiving the group call setup request, the TMSE determines whether the user has successfully authenticated, and if successful, sends an Invite (Invite) message to the scheduling server; if it fails, rejects the group call request of the user equipment;

After receiving the Invite message, the scheduling server determines whether the calling user equipment has registered the scheduling service, and determines whether the calling user equipment has the right to initiate the group call. If yes, the Invite 181 message is sent to the TMSE to notify the TMSE. Establishing a one-way service bearer for the calling user equipment; if the calling user equipment fails to register the scheduling service, responding to the Invite error response 480 to the TMSE, rejecting the group call request of the calling user equipment;

After the dispatching server sends the 181 message to the TMSE, it triggers the terminating Invite message to all connected TMSEs, and notifies the group call initiated by a calling user equipment, and needs to establish a downlink shared channel for it;

All the TMSEs that receive the terminating Invite message determine that the group identifier corresponds to the group identifier carried in the message. Whether the user equipment is served by the TMSE in the group, if not, responding to the 404 message to the scheduling server; if yes, triggering the cell where the user equipment in the group is located to initiate paging of the user equipment in the group;

Regardless of whether the user equipment in the group may be in the IDLE state or the CONNECTED state at this time, the paging can be normally responded to and added to the group session;

As long as one user equipment responds to the current paging, the network sends a group call establishment success message, and carries the right to authorize the group call initiator, that is, the calling user equipment;

After the group call initiator receives the authorization of the right to speak, the conversation begins, and the group call establishment process is completed.

The cluster user startup registration process, as shown in Figure 2, includes the steps:

The UE sends an attach request message and a cluster network selection indication to the e B, and the attach request message includes: an IMSI (International Mobile Subscriber Identifier) or an old GUTI (Globally Unique Temporary Identity) , valid last accessed TAI (Tracking Area Identity;), UE core network capability, UE-specified DRX (Discontinuous Reception) parameter, PDN type, PCO (protocol configuration option), encryption option Transmission tag, attachment type, KSI _ASME (Key Set Identifier-Access Security Management Entity), NAS (Non-Access Stratum, non-access stratum) serial number, NAS-MAC (Non) - Access Stratum - Media Access Control, Non-Access Stratum - Media Access Control) and additional GUTI.

A2. The eNB obtains a new TMSE identifier according to the old GUTI and the cluster selection network indication in the RRC message parameters carrying the UE attach request. If the new TMSE identity is not available, the eNB selects a new TMSE identity based on the load and other policies.

Then, the eNB will attach the request message and the TAI and ECGI of the cell where the UE is located (EUTRAN Cell Global

Identity, EUTRAN Cell Global Identity; EUTRAN, Evolved UMTS Terrestrial Radio Access Network The evolved UMTS Terrestrial Radio Access Network; UMTS, Universal Mobile Telecommunication System, Universal Mobile Telecommunications System are forwarded together to the new TMSE.

A3. If the UE identifies itself by the GUTI, and the TMSE to which the UE belongs has changed due to detachment, the new TMSE uses the GUTI from the UE to obtain the address of the old TMSE, and sends an identity request message to the old TMSE, requesting the UE IMSI, the old TMSE returns the identity response to the new TMSE, including the IMSI of the UE and the unused EPS authentication vector and KSIASME, KASME to the new TMSE; if the old TMSE cannot identify the UE or the integrity check of the attach request message Failure (same as the standard integrity protection algorithm in the existing 3GPP protocol), the old TMSE returns the appropriate error origin ("User authentication failed") to the new TMSE ₀

A4. If the UE is not recognized in the new or old TMSE, the new TMSE sends an identity request to the UE. To request IMSI. The UE then notifies the network using an identity response message containing the IMSI.

A5. If there is no UE context in the network, and the attach request message in step A1 is not integrity protected or encrypted, or if the integrity check fails, then the authentication of this step and the NAS security establishment process (both processes are standard) The 3GPP protocol process) is enforced. Otherwise, this step may not be performed.

If the NAS security algorithm changes, this step only performs the NAS security establishment process.

After this step, all NAS messages will be protected by the NAS security function indicated by TMSE.

A6. If there is an active bearer context in the new TMSE, for example, if the same TMSE is attached again without prior de-attachment, the old bearer context is deleted. If the TMSE changes after the last detachment, or the first attachment, or the ME (Mobile Equipment) Identity changes, or the IMSI or GUTI provided by the UE does not have corresponding bearer context information in the TMSE, then The TMSE sends a location update request to the HSS, where the location update request includes TMSE Identity, IMSI, ME Identity, TMSE capabilities, and Update type. The TMSE capability indicates the access restriction function status supported by the TMSE; the update type indicates that this is an attach procedure.

A7. The HSS sends a Location Delete Request message to the old TMSE, and the old TMSE deletes the mobility management and bearer context. If the old TMSE has an active bearer context, the old TMSE deletes the bearer resources.

A8. The old TMSE returns a location deletion response message to the HSS.

A9. The HSS sends a Location Update Response message to the new TMSE to answer the Update Location message. The location update response message includes IMSI and subscription data, and the subscription data includes one or more PDN subscription context information. Each subscription context contains the contracted QoS parameters and the signed APN-AMBR (the aggregate maximum bit rate of the APN). The new TMSE verifies that the UE is present in the new TA (tracking area). If the UE is not allowed to attach to the TA due to regional restrictions or access restrictions, the TMSE rejects the attach request. If the check is successful, the new TMSE creates a context for the UE. If the APN (Access Point Name) provided by the UE is not allowed by the subscription or the HSS rejects the update location, the new TMSE rejects the attach request message. The new TMSE creates a default bearer for the user and assigns the IP and cluster group IP addresses to the UE;

A10. The new TMSE creates a default bearer for the user, and assigns an IP address and a cluster group IP address to the UE, and sends an initial context setup request (Attach Accept message) to the e B, which carries the APN, GUTI, and PDN Type. (type), PDN Address, TAI List, EPS Bearer Identity, Session Management Request, Protocol Configuration Options, KSIASME, NAS sequence number (NAS) The serial number) and the NAS-MAC, and also need to carry the cluster group identifier and the group IP address.

If the new TMSE is assigned a new GUTI, the GUTI is also included in the message. The message is included in the set In the group SI interface (S1_T) control message Initial Context Setup Request, the S1 control message also includes the AS (access layer) security context of the UE, the handover restriction list, the bearer QOS parameters, and the UE-AMBR ( The aggregated maximum bit rate of the UE), the EPS bearer ID, and the SGW user plane TEID and address.

All. e B sends an RRC connection reconfiguration message to the UE, which contains the RB ID and Attach Accept message of the EPS system.

A12. The UE sends an RRC Connection Reconfiguration Complete message to the eNB.

A13. The eNB sends an Initial Context Response message to the new TMSE. The Initial Context Response message includes the TEID of the eNB and the address of the eNB, and the address is used for the downlink service of the reference point of the cluster S1 interface user plane (S1_Tu).

A14. The UE sends a Direct Transfer message to the eNB, and the message includes Attach Complete.

(attach complete) message, the Attach Complete message contains: EPS Bearer Identity^ NAS sequence number and NAS-MAC. Through the Attach Complete message, the UE starts to use the NAS security algorithm indicated by the new TMSE.

A15. The eNodeB forwards the Attach Complete message to the new TMSE using the upstream NAS transport message. After obtaining the PDN address information in the attach accept message, the UE may send the uplink data packet to the eNodeB, and the eNodeB encapsulates the uplink data packet in the GTP-U (GRPS Tunneling Protocol - Userplane) tunnel and uploads it to the new TMSE. . If the UE requests the PDN type of the dual address (Ipv4 and Ipv6), but the network only allows the single-address PDN type (Ipv4 or Ipv6), and the network only supports the bearer of the single address type, the UE will request to activate another one under the same APN. Address type PDN connection.

A16. The new TMSE creates a cluster group downlink bearer link for all groups in which the UE is located. That is, for each group, the new TMSE establishes a new one-way GTP-U tunnel between the TMSE and the eNB for carrying downlink data from the new TMSE to the eNB.

A17. The UE registers the request by directly transmitting the message; or the new TMSE sends an indication message to the dispatching server, which is carried by the SIP REGISTER message. The message carries information such as the user ID, the group information, and the TMSE address.

A18. After receiving the indication message in the network, the scheduling server performs scheduling service authentication on the UE, and after the authentication succeeds, responds to the 200 OK message to the new TMSE. If the authentication fails, the response error response code indicates that the scheduling service registration of the UE is failed. The new TMSE needs to record the registration failure information of the scheduling service, and rejects when the UE initiates the group call service next time. The new TMSE transmits the 200 OK message to the UE through the direct transmission of the downlink NAS message.

Referring to FIG. 3, the cluster call initiated by the cluster user provided by the embodiment of the present invention includes the following steps:

1. If UE1 does not have an RRC connection, the RRC connection is established first. Then, UE1 initiates a group call setup request to The network, the group call setup request is transmitted through a NAS PDU (Packet Data Unit). After receiving the group call establishment request, e Bl transparently transmits to TMSE1;

2. After receiving the group call setup request, the TMSE1 converts the group call setup request into an Invite (Invite) message based on the SIP (Session Initiation Protocol), and sends the message to the scheduling server, where the message carries: The calling number (initiating the group caller ID or number), and the called number (the group ID or number that needs to be called).

3. If an error occurs in the scheduling server, or it is determined that the UE1 does not have the right to initiate a group call, for example, the calling party UE1 is not the group user, etc., the error response code 408 is sent to the TMSE1, and the TMSE1 receives the error response code 408, and the timing is passed. Release the RRC connection;

4. After the scheduling server successfully authorizes the calling user UE1, the 181 temporary response corresponding to the SIP-based Invite message is sent to the TMSE1, and the TMSE1 is notified that the call is in progress;

5. If UE1 is in an idle state, TMSE1 establishes an uplink for the calling user, and sends an initial context establishment request to the eNB1;

6. eNB1 should first activate security, and then send an RRC connection reconfiguration request of the air interface to UE1;

7. After receiving the UE1, the RRC connection reconfiguration process is performed, and after completion, the RRC connection reconfiguration is completed and the eNB1 is completed. 8. The eNB1 sends an initial context establishment response to the TMSE1.

9. If the calling UE is in the connected state, the TMSE1 initiates the establishment of the default bearer, initiates the establishment of the dedicated bearer, sends an E-RAB (E-UTRAN radio access bearer) setup request, and the eNB1 receives the E-RAB setup request. After the RRC connection reconfiguration is initiated according to the request, a dedicated bearer is established for the calling user;

10. The eNB1 sends an E-RAB setup response to the TMSE1 after the RRC connection reconfiguration is completed.

11. (Synchronize with step4) After receiving the SIP-based Invite message, the scheduling server queries the local database according to the information carried in the SIP-based Invite message, and obtains the called UE of the group call (in FIG. 4). The address of all TMSEs (TMSE2 TMSEn in Figure 4) to which UE2 UEn belongs;

The scheduling server sends an Invite message based on the SIP format to each TMSE serving the called UE. The SIP-based Invite message carries: an identifier of the calling user UE1 (the identifier or number of the user who initiated the group call establishment request) And the identity of the called UE (the identity or number of each UE that needs to be called in the group);

After the TMSE of the called UE receives the SIP-based Invite message sent by the scheduling server, if the SIP-based Invite message determines that no user equipment in the group corresponding to the group identifier serves the TMSE, the response is 404. The indication message that the user does not exist is sent to the scheduling server; otherwise, the paging request is sent to e B2 to page the called UE;

In the embodiment of the present invention, the messages transmitted between the scheduling server and the TMSE are all messages based on the SIP format.

12. The group call is the TMSE (for example, TMSE2) served by the called UE, and the group call is sent to the called group user. A request message is sent to the e B2 for requesting the eNB to establish a context for the cluster user group;

13. The e B2 establishes a group call context with all downlink users, and responds to the group call context establishment response to the TMSE2. The purpose is that the eNB responds to the result of the TMSE establishing a context for the cluster user group.

After receiving the group call context establishment response message, the TMSE2 responds to the SIP 200OK to the scheduling server, and the message carries a content such as a success response code;

15. The scheduling server response is used to indicate that an acknowledgement (ACK) message of the SIP 200 OK is received to the TMSE2;

After receiving the off-hook 200 OK message of the called UE forwarded by any TMSE from TMSE2 to TMSEn, the scheduling server sends a group call setup response message to the TMSE1 through the 200 OK message, and the message carries the voice right authorization simultaneously; 17. The TMSE1 sends the message to the UE1. The group call establishes a response, where the call right authorization message is used to grant the call right to the UE1; the eNB 1 performs the direct transmission of the NAS message;

17.1. After receiving the rights authorization message, UE1 sends a rights authorization completion message to TMSE1.

18. The TMSE1 sends an acknowledgement (ACK) message to the scheduling server;

19, (can be initiated simultaneously with the 16th step) scheduling the server through the SIP notification (INFO) message, carrying the right to occupy the content to the TMSE2;

20. After receiving the SIP INFO message, the TMSE2 replies with a message acknowledgment response 200 OK to the scheduling server. 21. The TMSE2 sends a privilege occupation message to the e B2, which is used to instruct the e B2 to send the message occupant message to the called party through the broadcast mode. User equipment.

It should be noted that the cluster service implementation system provided in the embodiment of the present invention is not limited to the implementation of the group call establishment process, for single call setup, single call release, group call release, multicast establishment, multicast release, and voice right. The implementation of the process of application, call preemption, call queue, release of call, emergency call, dynamic reorganization, and preemptive priority call are also applicable.

For example, the UE initiates a single call setup request, and the request is sent to the TMSE through the NAS direct transfer message, and the TMSE converts the NAS direct transfer message into a SIP format-based INVITE message and sends the message to the dispatching server.

Therefore, in summary, the cluster service implementation system provided by the embodiment of the present invention includes:

a TMSE, configured to convert the received cluster service request message from the user equipment UE into a session initiation protocol SIP message, and send the SIP message to the scheduling server; and convert the received SIP message from the scheduling server into a UE capable The identified message is sent to the UE;

Preferably, the system further comprises:

The calling UE is used to initiate a group call setup request; An eNB serving as a serving UE, and a TMSE for forwarding a group call establishment request to the calling UE;

When the TMSE is used as the TMSE for serving the UE, the method is specifically configured to: convert the group call establishment request into a session initiation protocol SIP-based invitation Invite message, where the group call establishment indication is carried, and the SIP format-based Invite is used. The message is sent to the scheduling server;

The scheduling server is specifically configured to: receive an Invite message based on the SIP format, and obtain a group call establishment indication from the calling UE; when the authorization of the calling UE is successful, notify the TMSE served by the calling UE that the group call establishment indication corresponds to The group call is in progress.

Preferably, the scheduling server is further configured to:

If there is an error inside the scheduling server, or it is determined that the calling user does not have the right to initiate a group call, the error response is sent to the TMSE serving the calling UE.

Preferably,

If the calling UE is in an idle state, the TMSE1 serving the calling UE is further configured to: establish an uplink for the calling UE, and send an initial context establishment request to the eNB serving the calling UE;

The eNB serving the calling UE is further configured to: activate security, and then send an RRC connection reconfiguration request of the air interface to the calling UE;

The calling UE is further configured to: after receiving the RRC connection reconfiguration request, perform an RRC connection reconfiguration process, and after completing the RRC connection reconfiguration, complete the eNB serving the calling UE;

The eNB serving the calling UE is further configured to: send an initial context setup response to the TMSE serving the calling UE. Preferably,

If the calling UE is in the connected state, the TMSE serving the calling UE is further configured to: after establishing a default bearer for the calling UE, initiate a dedicated bearer setup, and send an E-UTRAN radio access bearer E-RAB establishment request to the master. An eNB called a UE service;

The eNB serving as the serving UE is further configured to: after receiving the E-RAB setup request, initiate RRC connection reconfiguration according to the request, establish a dedicated bearer for the calling UE; and send E after the RRC connection reconfiguration is completed. - The RAB establishes a response to the TMSE serving the calling UE.

Preferably, the scheduling server is further configured to:

Querying the local database according to the information carried in the SIP-based Invite message, and obtaining the addresses of all the TMSEs to which the called UE belongs to the group call; respectively sending the Invite message based on the SIP format to each serving the called UE. TMSE, which carries the identity of the calling UE, and the identity of the called UE;

The system also includes:

When the TMSE is used as the TMSE for the called UE, it is specifically used to: receive the scheduling server to send based on Invite message in SIP format, according to the SIP format-based Invite message, if it is determined that there is no called UE in the group

The TMSE serves to respond to the indication message that the user does not exist to the scheduling server; otherwise, sends a paging request to the eNB serving the called UE;

The eNB serving the called UE is configured to receive a paging request sent by the TMSE serving the called UE, and page the called UE.

Preferably, the TMSE serving the called UE is also used to:

And sending, by the called UE, a group call context setup request message to the eNB serving the called UE, and receiving a group call context establishment response responsive to the eNB served by the called UE; and sending a SIP 200 OK message to the scheduling server, and receiving the scheduling A confirmation message replied by Server.

Preferably, the scheduling server is further configured to: pick up the called UE that is forwarded by the TMSE serving the called UE.

After the 200 OK message, the group call setup response message is sent to the TMSE served by the calling UE through the 200 OK message, and the message carries the voice right authorization at the same time;

The TMSE that is served by the calling UE is further configured to: send a group call setup response to the eNB that serves the calling UE, where the call authorization request message is used to grant the call right to the calling UE;

The eNB serving the calling UE is further configured to: forward the group call setup response to the calling UE, and forward the call authority completion message returned by the calling UE to the TMSE serving the calling UE.

Preferably, the scheduling server is further configured to: by using a SIP notification message, carrying the content occupied by the right to the TMSE serving the called UE;

The TMSE serving the called UE is further configured to: after receiving the SIP notification message, reply to receive the message confirmation response 200 OK to the scheduling server; and send a rights usage message to the eNB serving the called UE, to indicate that The eNB served by the called UE broadcasts a rights occupation message to the called UE.

Specifically, referring to FIG. 4, on the TMSE side, a cluster service implementation apparatus according to an embodiment of the present invention includes: an uplink sending unit 11 configured to convert a received cluster service request message from a user equipment UE into a session initial a SIP message, sending the SIP message to the scheduling server;

The downlink sending unit 12 is configured to convert the received SIP message from the scheduling server into a message that the UE can identify, and send the message to the UE.

Preferably, the uplink sending unit 11 is specifically configured to:

Receiving a group call setup request from the calling user equipment UE;

The group call establishment request is converted into a SIP initial invitation Invite message, which carries a group call establishment indication, and sends the SIP format-based Invite message to the scheduling server Server.

Preferably, the device further comprises: The error response receiving unit 13 is configured to receive an error response that is sent by the scheduling server when an error occurs in the scheduling server, or the calling UE does not have the right to initiate the group call establishment request; or

The temporary response receiving unit 14 is configured to: after the scheduling server successfully authorizes the calling UE, receive a temporary response sent by the scheduling server, to determine that the group call establishment request initiated by the calling UE is in progress.

Preferably, the device further comprises:

The initial context establishing unit 15 is configured to: when the calling UE is in an idle state, establish an uplink for the calling UE, send an initial context setup request to the evolved base station eNB serving the calling UE, and receive the serving as the calling UE. The initial context setup response sent by the eNB; and,

The E-RAB establishing unit 16 is configured to: when the calling UE is in the connected state, establish a default bearer for the calling UE, initiate a dedicated bearer setup, and send an E-UTRAN radio access bearer E-RAB establishment request, to trigger The eNB that the calling UE serves initiates RRC connection reconfiguration, and establishes a dedicated bearer for the calling UE; and the E-RAB setup response sent by the eNB that receives the serving of the calling UE after the RRC connection reconfiguration is completed.

Preferably, the device further comprises:

The group call establishment response receiving unit 17 is configured to receive a group call setup response message sent by the scheduling server, where the call right authorization message is included;

The group call setup response sending unit 18 is configured to send a group call setup response message to the calling user equipment by using the eNB, where the call right authorization message is carried.

Preferably, the device further comprises:

The right authority authorization completion message receiving unit 19 is configured to receive a voice right authorization completion message replied by the calling user equipment, and the right authority authorization response message sending unit 20 is configured to send the voice right authorization response message to the scheduling server.

Preferably, the device further comprises:

The attach request receiving unit 21 is configured to receive an attach request from the calling user equipment, and send an online indication message to the scheduling server after receiving the attach complete message of the autonomous calling user equipment;

The authentication result receiving unit 22 is configured to receive a scheduling service authentication result message for the calling user equipment that is sent by the scheduling server.

Preferably, the authentication result receiving unit 22 is further configured to:

If the scheduling service authentication result indicates that the authentication fails, the registration failure information of the scheduling service is recorded, and the next group call service initiated by the UE is rejected.

Preferably, the device further comprises:

The Invite message receiving unit 23 is configured to receive a SIP format-based invitation Invite message sent by the scheduling server Server, where the identifier of the calling user equipment that initiates the group call establishment request, and the called user equipment identifier are included; The determining processing unit 24, according to the SIP format-based Invite message, if it is determined that the user equipment corresponding to the called user equipment identifier in the group is served by the TMSE, responding to the scheduling message that the user does not exist; otherwise, sending the search The call is requested to the eNB serving the called UE.

Preferably, the device further comprises:

The group call context message transmission unit 25 is configured to send, to the called user equipment, a group call context setup request message to the eNB serving the called UE, and receive a group call context establishment response responsive to the eNB served by the called UE; The unit 26 is configured to send a SIP 200 OK message to the scheduling server, and receive an acknowledgement message for scheduling the server reply.

Preferably, the device further comprises:

The right occupant occupation message receiving unit 27 is configured to receive the right occupant occupation message sent by the scheduling server, and reply the 200 OK message to the scheduling server;

The right occupant message sending unit 28 is configured to send a severance message to the eNB that serves the called UE, and the eNB that is used to indicate that the called UE serves the broadcast occupant to the called user equipment.

Preferably, the cluster service implementation apparatus shown in FIG. 4 can be used as the TMSE serving the called UE or as the TMSE serving the called UE.

Referring to FIG. 5, in a TMSE side serving the called UE, a cluster service implementation apparatus provided by the embodiment of the present invention includes:

The Invite message receiving unit 23 is configured to receive a SIP format-based invitation Invite message sent by the scheduling server, where the identifier of the calling user equipment that initiates the group call establishment request, and the called user equipment identifier are included;

The determining processing unit 24, according to the SIP format-based Invite message, determines that the user equipment corresponding to the called user equipment identifier in the group is served by the cluster mobility session management entity TMSE where the device is located, and the response user does not exist. The indication message is sent to the scheduling server; otherwise, the paging request is sent to the eNB serving the called UE.

Preferably, the device further comprises:

The right occupant message sending unit 28 is configured to send a CDR message to the eNB, to indicate that the eNB broadcasts The mode sends a message occupation message to the called user equipment.

Referring to FIG. 6, on the scheduling server side, a cluster service implementation apparatus according to an embodiment of the present invention includes: a receiving SIP message unit 31, configured to receive a session initial protocol SIP message sent by a cluster mobility session management entity TMSE;

SIP message processing unit 32, for # ^ According to the SIP message is processed, the processing result by the SIP message to TMSE ₀

Preferably,

The receiving SIP message unit 31 is specifically configured to: receive the session initiation protocol sent by the cluster mobility session management entity TMSE based on the SIP format invitation Invite message, and obtain a group call establishment indication from the calling UE;

The processing SIP message unit 32 is specifically configured to: when the authorization of the calling UE is successful, notify the TMSE that the group call corresponding to the group establishment indication is in progress.

Preferably, the device further comprises:

The error response unit 33 is configured to respond to the error response to the TMSE if an error occurs inside the scheduling server or if the calling user does not have the right to initiate the group call.

Preferably, the device further comprises:

The TMSE address query unit 34 is configured to: after receiving the Invite message based on the SIP format, query the local database according to the information carried in the SIP-based Invite message, and obtain the addresses of all TMSEs to which the called UE of the group call belongs;

The Invite message sending unit 35 is configured to separately send an Invite message based on the SIP format to each TMSE serving the called UE, where the identifier of the calling user and the identifier of the called UE are carried.

Preferably, the device further comprises:

The 200 OK message receiving unit 36 is configured to receive, by the TMSE serving the called UE, a SIP 200 OK message for replying to the SIP format based Invite message.

Preferably, the device further comprises:

The acknowledgment message replying unit 37 is configured to reply to the acknowledgment message of the TMSE serving the called UE for the SIP 200 OK message.

Preferably, the device further comprises:

The group call setup response message sending unit 38 is configured to: after receiving the off-hook 200 OK message of the called user forwarded by the TMSE served by the called UE, send a group call setup response message to the TMSE served by the calling UE by using the 200 OK message, The message authorization message is carried.

Preferably, the device further comprises: The right authorization response message receiving unit 39 is configured to receive a right authorization response message returned by the TMSE served by the calling user.

Preferably, the device further comprises:

The right occupant message sending unit 40 is configured to send a message occupant message to the TMSE serving the called UE through the SIP INFO message after receiving the off-hook 200 OK message of the called user forwarded by the TMSE serving the called UE. And receive a 200 OK message replied to the TMSE serving the called UE.

Preferably, the device further comprises:

The network indication message receiving unit 41 is configured to receive the presence indication message sent by the TMSE served by the calling UE, and perform scheduling service authentication on the calling user according to the presence indication message.

Preferably, the device further comprises:

The authentication result replying unit 42 is configured to reply to the TMSE serving the calling user for the scheduling service authentication result of the calling UE.

In summary, the embodiment of the present invention is based on the TD-LTE broadband multimedia cluster architecture, and proposes a group call establishment process for a broadband multimedia cluster, including that the called user can respond in the IDLE state or the CONNECT state during the cluster group call establishment process. The group call establishment message; and, in the cluster group call establishment process, the initiating user is not authenticated, because each user accessing the network has been registered and authenticated in the cluster user equipment activation authentication process based on FIG. If the user is considered to be a trusted user before the user logs out, the group call establishment process can be directly initiated. Therefore, the broadband multimedia cluster system of the present invention can provide users with higher bandwidth and better user experience than narrowband digital clusters, for example, can provide visual group call service, and the TD-LTE broadband multimedia cluster system architecture proposed by the present invention is more compact. Easy to implement, compared with the three schemes proposed by CCSA, the signaling interaction in the group call establishment process can be better reduced, so as to reduce the group call establishment delay.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention is in the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) in which computer usable program code is embodied.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Rights request

1. A cluster service implementation device, characterized in that the device includes:

The uplink sending unit is used to convert the cluster service request message received from the user equipment UE into a session initialization protocol SIP message, and send the SIP message to the scheduling server Server;

The downlink sending unit is used to convert the SIP message received from the scheduling server into a message that the UE can recognize, and send it to the UE.

2. The device according to claim 1, wherein the uplink sending unit is specifically configured to: receive a group call establishment request from the calling user equipment UE; convert the group call establishment request into a session initialization protocol-based SIP The Invite message in the SIP format carries a group call establishment instruction, and the Invite message based on the SIP format is sent to the scheduling server Server.

3. The device according to claim 2, characterized in that, the device further includes:

The error response receiving unit is used to receive an error response from the scheduling server when an error occurs within the scheduling server, or the calling UE does not have the right to initiate a group call establishment request; or,

The temporary response receiving unit is used to receive the temporary response sent by the scheduling server after the scheduling server successfully authorizes the calling UE to determine that the group call establishment request initiated by the calling UE is in progress.

4. The device according to claim 3, characterized in that, the device further includes:

The initial context establishment unit is used to establish an uplink for the calling UE when the calling UE is in an idle state, send an initial context establishment request to the evolved base station eNB serving the calling UE, and receive the The initial context establishment response sent by the eNB;

The E-RAB establishment unit is used to initiate dedicated bearer establishment when the calling UE is in the connected state, and after establishing the default bearer for the calling UE, sends an E-UTRAN radio access bearer E-RAB establishment request, mainly triggering The eNB serving the calling UE initiates RRC connection reconfiguration to establish a dedicated bearer for the calling user; and receives the E-RAB establishment response sent by the eNB serving the calling UE after the RRC connection reconfiguration is completed.

5. The device according to claim 4, characterized in that, the device further includes:

The group call establishment response receiving unit is used to receive the group call establishment response message sent by the dispatching server, including the voice authorization message;

The group call establishment response sending unit is used to send a group call establishment response message to the calling user equipment, which carries a voice authorization message.

6. The device according to claim 5, characterized in that, the device further includes:

The voice authorization completion message receiving unit is used to receive the voice authorization completion message replied by the calling user equipment; the voice authorization response message sending unit is used to send the voice authorization response message to the scheduling server.

7. The device according to claim 1, characterized in that, the device further includes:

The attachment request receiving unit is configured to receive an attachment request from the calling user equipment, and after receiving the attachment completion message from the calling user equipment, send a network presence indication message to the scheduling server;

The authentication result receiving unit is configured to receive the scheduling service authentication result message for the calling user equipment replied by the scheduling server.

8. The device according to claim 7, wherein the authentication result receiving unit is further configured to: if the scheduling service authentication result indicates authentication failure, record the registration failure information of the scheduling service, using to refuse

The next group call service initiated by the UE.

9. The device according to claim 1, characterized in that, the device further includes:

The Invite message receiving unit is used to receive the Invite message based on the SIP format sent by the scheduling server Server, which includes the identification of the calling user equipment that initiates the group call establishment request, and the identification of the called user equipment;

The judgment processing unit, if it is determined according to the Invite message based on the SIP format that there is no user equipment corresponding to the called user equipment identification in the group that is served by this TMSE, then responds to the scheduling server with an indication message that the user does not exist; otherwise, send The paging request is sent to the eNB serving the called UE.

10. The device according to claim 9, characterized in that, the device further includes:

The group call context message transmission unit is configured to send a group call context establishment request message to the eNB serving the called UE for the called user equipment, and receive a group call context establishment response responded by the eNB serving the called UE; Confirmation unit , used to send the SIP 200OK message to the scheduling server, and receive the confirmation message replied by the scheduling server.

11. The device according to claim 10, characterized in that, the device further includes:

The voice occupation message receiving unit is used to receive the voice occupation message sent by the scheduling server, and reply a 200OK message to the scheduling server;

The voice right occupation message sending unit is used to send the voice right occupation message to the eNB, and is used to instruct the eNB to send the voice right occupation message to the called user equipment through broadcast.

12. A cluster service implementation device, characterized in that the device includes:

The Invite message receiving unit is used to receive the Invite message based on the session initialization protocol SIP format sent by the scheduling server Server, which includes the identification of the calling user equipment that initiates the group call establishment request and the identification of the called user equipment;

The judgment processing unit, if it is determined according to the Invite message based on the SIP format that there is no user equipment corresponding to the called user equipment identification in the group that is served by the cluster mobility session management entity TMSE where the device is located, then responds that the user does not exist. Instruction message to the scheduling server; otherwise, send a paging request to the eNB serving the called UE.

13. The device according to claim 12, characterized in that, the device further includes:

14. The device according to claim 13, characterized in that, the device further includes:

15. A cluster service implementation device, characterized in that the device includes:

Receive SIP message unit, used to receive the session initialization protocol SIP message sent by the cluster mobility session management entity TMSE;

The SIP message processing unit is used to process the SIP message and send the processing result to TMSE through the SIP message ₀

16. The device according to claim 15, characterized in that,

The receiving SIP message unit is specifically used to: receive an invitation message based on the session initialization protocol SIP format sent by the cluster mobility session management entity TMSE, and obtain the group call establishment instruction from the calling UE;

The processing SIP message unit is specifically used to: when the calling UE is successfully authorized, notify TMSE that the group call corresponding to the group call establishment indication is in progress.

17. The device according to claim 15, characterized in that, the device further includes:

The error response unit is used to respond an error response to the TMSE if an error occurs within the scheduling server, or it is determined that the calling user does not have the right to initiate a group call.

18. The device according to claim 15, characterized in that, the device further includes:

The TMSE address query unit is used to query the local database according to the information carried in the Invite message based on the SIP format after receiving the Invite message based on the SIP format, and obtain the addresses of all TMSEs to which the called user of the group call belongs;

The Invite message sending unit is used to send an Invite message based on the SIP format to each TMSE serving the called UE, which carries the identity of the calling user and the identity of the called UE.

19. The device according to claim 18, characterized in that, the device further includes:

200OK message receiving unit, used to receive TMSE serving the called UE for Invite based on SIP format. The message replies with a SIP 200OK message.

20. The device according to claim 19, characterized in that, the device further includes:

The confirmation message reply unit is used to reply the confirmation message for the SIP 200 OK message from the TMSE serving the called UE.

21. The device according to claim 20, characterized in that, the device further includes:

The group call establishment response message sending unit is used to send a group call establishment response message to the TMSE serving the calling user through the 200OK message after receiving the off-hook 200OK message of the called user forwarded by the TMSE serving the called UE, where Carry voice authorization message.

22. The device according to claim 21, characterized in that, the device further includes:

The voice authorization response message receiving unit is used to receive the voice authorization response message returned by the TMSE serving the calling user.

23. The device according to claim 21, characterized in that, the device further includes:

The voice right occupation message sending unit is used to send the voice occupation message to the TMSE serving the called UE through the SIP INFO message after receiving the off-hook 200OK message of the called user forwarded by the TMSE serving the called UE. And receive the 200OK message replied by the TMSE serving the called UE.

24. The device according to claim 15, characterized in that, the device further includes:

The network presence indication message receiving unit is configured to receive the network presence indication message sent by the TMSE serving the calling user, and perform scheduling service authentication on the calling user based on the network presence indication message.

25. The device according to claim 24, characterized in that, the device further includes:

Authentication result reply unit, used to reply the scheduling service authentication result for the calling user to the service provider serving the calling user.

TMSE ₀

26. A cluster service implementation system, characterized in that the system includes:

TMSE is used to convert the cluster service request message received from the user equipment UE into a session initiation protocol SIP message, and send the SIP message to the scheduling server Server; and, convert the SIP message received from the scheduling server into the UE Messages that can be identified and sent to the UE;

The scheduling server is used to receive the SIP message sent by the TMSE, process it according to the SIP message, and send the processing result to the TMSE through the SIP message.

27. The system according to claim 26, characterized in that, the system further includes:

The calling UE is used to initiate a group call establishment request;

The eNB serving the calling UE is used to forward the group call establishment request to the TMSE serving the calling UE;

TMSE is specifically used to: When serving as a TMSE for the calling UE, convert the group call establishment request into a conference call. The session initialization protocol is based on the Invite message in SIP format, which carries the group call establishment instruction, and sends the Invite message based on SIP format to the scheduling server;

Scheduling Server is specifically used to: receive the Invite message based on the SIP format, and obtain the group call establishment instruction from the calling UE; when the authorization for the calling UE is successful, notify the TMSE serving the calling UE that the group call is established Indicates that the corresponding group call is in progress.

28. The system according to claim 27, characterized in that the scheduling server is also used to:

If an error occurs within the scheduling server, or it is determined that the calling user does not have the right to initiate a group call, an error response is returned to the TMSE serving the calling UE.

29. The system according to claim 28, characterized in that,

TMSE1 serving the calling UE is also used to: If the calling UE is in the idle state, establish an uplink for the calling UE, and send an initial context establishment request to the eB serving the calling UE;

The eNB serving the calling UE is also used to: activate security, and then send the RRC connection reconfiguration request of the air interface to the calling UE;

The calling UE is also used to: perform RRC connection reconfiguration processing after receiving the RRC connection reconfiguration request, and upon completion, reply RRC connection reconfiguration completed to the eNB serving the calling UE;

The eNB serving the calling UE is also used to send an initial context establishment response to the TMSE serving the calling UE.

30. The system according to claim 28, characterized in that,

The TMSE serving the calling UE is also used to: If the calling UE is in the connected state, after establishing the default bearer for the calling UE, initiate dedicated bearer establishment and send an E-UTRAN radio access bearer E-RAB establishment request to the calling UE. Call the eNB serving the UE;

The eNB serving the calling UE is also used to: After receiving the E-RAB establishment request, initiate RRC connection reconfiguration according to the request, and establish a dedicated bearer for the calling UE; and, send E-RAB after the RRC connection reconfiguration is completed. -RAB establishment response to the TMSE serving the calling UE.

31. The system according to claim 27, characterized in that the scheduling server is also used to:

According to the information carried in the received Invite message based on SIP format, query the local database to obtain the addresses of all TMSEs to which the called UE of the group call belongs; send the Invite message based on SIP format to each called party respectively.

TMSE served by the UE, which carries the identity of the calling UE and the identity of the called UE;

TMSE is specifically used to: When the TMSE serves as a TMSE for the called UE, receive the Invite message based on the SIP format sent by the scheduling server. According to the Invite message, if it is determined that there is no called UE in the group that is served by the TMSE, then respond Send an indication message that the user does not exist to the scheduling server; otherwise, send a paging request to the eNB serving the called UE; The eNB serving the called UE is used to receive the paging request sent by the TMSE serving the called UE and page the called UE.

32. The system according to claim 31, characterized in that the TMSE serving the called UE is also used to:

For the called UE, send a group call context establishment request message to the eNB serving the called UE, and receive a group call context establishment response from the eNB serving the called UE; and send a SIP 200OK message to the scheduling server, and receive the scheduling Confirmation message replied by Server.

33. The system according to claim 31, wherein the scheduling server is further configured to: after receiving the off-hook 200OK message of the called UE forwarded by the TMSE serving the called UE, send the group call through the 200OK message. Create a response message to the TMSE serving the calling UE. The message also carries voice authorization;

The TMSE serving the calling UE is also used to: Send a group call establishment response to the eNB serving the calling UE, which carries a voice authorization message and is used to grant the voice right to the calling UE;

The eNB serving the calling UE is also used to: forward the group call establishment response to the calling UE, and forward the voice authorization completion message responded by the calling UE to the TMSE serving the calling UE.

34. The system according to claim 31, characterized in that the scheduling server is also used to: carry the voice occupation content to the TMSE serving the called UE through a SIP notification message;

The TMSE serving the called UE is also used to: After receiving the SIP notification message, reply with a message confirmation response

200 OK to the scheduling server; and, sending a voice occupation message to the eNB serving the called UE to instruct the eNB serving the called UE to send the voice occupation message to the called UE in a broadcast manner.