CN108696828A - The roaming processing method of wireless dispatching desk - Google Patents

Abstract

The application proposes that wireless dispatching desk roams processing method.Method includes:The clustered control functional entity TCF of the ownership place cluster core net of wireless dispatching desk receives the registration message that the TCF of the visited place cluster core net of wireless dispatching desk is sent, the registration message carries the location information of the visited place cluster core net, the terminal type of carrying is designated as wireless dispatching desk, and the registration type carried is designated as initial registration, then it is determined as wireless dispatching desk initial registration, after succeeding in registration location register message is sent to the TCF for the group ownership cluster core net organized belonging to wireless dispatching desk, location register message carries the address of the TCF of the ownership place cluster core net.Group when the application realizes wireless dispatching desk roaming exhales the switching in foundation, the right to apply for words, right of speech release and group-calling process.

Description

Roaming processing method of wireless dispatching station

technical field

The invention relates to the field of trunking technology, in particular to a roaming processing method of a wireless dispatching station.

Background technique

The dispatcher console is a unique terminal in the cluster system, which provides the dispatching and management functions of cluster services for dispatchers or operators with special authority. The main product form of the current dispatcher is a wired dispatcher, which is directly connected to the cluster core network, and transmits control signaling and business data between the dispatcher and the cluster core network through the D interface (that is, the interface between the dispatcher and the cluster core network). .

With the increasing complexity of cluster business scenarios, the functional requirements of the wireless dispatcher are proposed. The wireless dispatcher is connected to the cluster core network through a wireless module, and its wireless link has a certain QoS (Quality of Service) guarantee. It is required to support all business functions of the cable dispatching station, including multimedia video dispatching, emergency call, multicast call, dynamic reorganization, remote stun/remote death/resurrection, forced insertion and forced removal, subscription, all call, careful monitoring, environmental monitoring/surveillance and other cluster supplementary services to realize the D interface between the up-multiplexed wired dispatcher and the cluster core network.

The current B-TrunC (Boardband Trunking Communication, broadband trunking communication) system core network interconnection and intercommunication standard adopts the Home Routed (home routing) method under the roaming architecture. For point-to-point services (such as single call, group call uplink), the cluster Core network control, user plane data passes through the core network of the cluster; for point-to-multipoint services (such as group call downlink), the core network of the group belonging to the cluster is used as the service control point, and at the same time, to prevent terminals belonging to different core networks from roaming to the same When a visiting core network receives multiple call establishment requests from the same group (from different home core networks), the control signaling and service data are directly sent to the visiting cluster core by the group home cluster core network network.

In order to realize the above mechanism, for a roaming terminal, when it is turned on at the visited place or moves to the visited place, the cluster core network of the visited place registers with the cluster core network of the home place on behalf of the terminal, and the cluster core network of the home place registers with the group to which the terminal belongs. The cluster core network performs location registration, and notifies the group belonging core network of the cluster core network where the terminal is currently located, which is used to determine which cluster core networks to send downlink call establishment requests to when the group call is established, and to send downlink calls to these cluster core networks subsequently. business data.

If the group members include wired dispatcher and wireless terminal at the same time, and a terminal roams to the cluster core network where the wired dispatcher belongs, in order to reduce the media plane traffic between the cluster core networks, the group belongs to the cluster core network and the dispatcher belongs to the cluster The core network does not distinguish between the wired dispatcher and the wireless terminal. Two-way sessions are established between the two according to the group call uplink and the group call downlink. The group member type is judged by the cluster core network to which the dispatcher belongs. Establish a session, and send control signaling and service data through the downlink shared channel of the air interface for the wireless terminal.

The wireless dispatcher carries the D interface signaling and service data through the user plane of the wireless module. The existing technology only clarifies the group call establishment method when the group contains the wired dispatcher and roaming wireless terminals. Because the wired dispatcher only has a home location The cluster core network has no concept of roaming, and the wireless terminal uses the downlink shared channel to realize the group call service, which does not involve the D interface. Therefore, the group call implementation scheme for the wired dispatcher and wireless terminal in the multi-core network interconnection scenario cannot be directly applied to the wireless Dispatcher. Currently, there is no solution for the scenario where the group contains roaming wireless dispatchers.

Contents of the invention

The invention provides a roaming processing method of a wireless dispatching station to realize group call establishment when a roaming wireless dispatching station is included in the group.

Technical scheme of the present invention is realized like this:

A wireless dispatching station roaming processing method, the method comprising:

The cluster control functional entity TCF of the home cluster core network of the wireless dispatcher receives the registration message sent by the TCF of the visited cluster core network of the wireless dispatcher, the registration message carries the location information of the visited cluster core network, and carries The terminal type indicated by the terminal is a wireless dispatcher, and the registration type indicated is initial registration, then it is determined to be the initial registration of the wireless dispatcher. After the registration is successful, a location registration message is sent to the TCF of the cluster core network of the group to which the wireless dispatcher belongs. The location registration message carries the address of the TCF of the home cluster core network,

Wherein, the registration message is: the TCF of the cluster core network at the visited location receives a registration request from the wireless dispatcher, and the terminal type reported in the registration request is a wireless dispatcher, then the wireless dispatcher sends a report to the wireless dispatcher on behalf of the wireless dispatcher. It is sent by the TCF of the core network of the cluster core network.

After the TCF of the home cluster core network sends the location registration message to the TCF of the group home cluster core network to which the wireless dispatcher belongs, it further includes:

The TCF of the cluster core network at which the group belongs receives the group call establishment request message, and sends a report to the cluster core network of the wireless dispatcher according to the address of the TCF of the cluster core network of the wireless dispatcher carried in the location registration message. The TCF of the core network sends a group call establishment request message to establish a group call downlink session from the cluster core network at which the group belongs to the cluster core network at the home site of the wireless dispatcher;

The TCF of the home cluster core network of the wireless dispatcher receives the group call establishment request message sent by the TCF of the group's home cluster core network, and determines that the group members include the wireless dispatcher according to the group number carried by the message, and then sends the wireless dispatcher The TCF of the visited site cluster core network sends a group call establishment request message carrying the number of the wireless dispatcher to establish a group call session from the home cluster core network to the visited site cluster core network;

The TCF of the visited site cluster core network of the wireless dispatcher sends a group call establishment request message to the wireless dispatcher according to the wireless dispatcher number in the received group call establishment request message, so as to establish a call from the visited site cluster core network to the wireless dispatcher. station's group call session.

After the TCF of the visited site cluster core network of the wireless dispatcher sends the group call establishment request message to the wireless dispatcher, it further includes:

After the group call downlink session from the cluster core network belonging to the group to the cluster core network of the wireless dispatching station is established, the TCF of the group belonging to the cluster core network sends a speaking right notification message to the TCF of the cluster core network of the wireless dispatching station ;

The TCF of the home cluster core network of the wireless dispatcher receives the right to speak message, determines that the group members include the wireless dispatcher, and sends the right to speak message carrying the wireless dispatcher number to the TCF of the visited cluster core network of the wireless dispatcher; The TCF of the cluster core network at the visited site sends a speaking right notification message to the wireless dispatching station according to the wireless dispatching station number in the received speaking right notification message.

After the TCF of the home cluster core network sends the location registration message to the TCF of the group home cluster core network to which the wireless dispatcher belongs, it further includes:

The wireless dispatcher sends a group call establishment request message to the TCF of the visited cluster core network to establish a group call session;

The TCF of the visited cluster core network forwards the group call establishment request message to the TCF of the home cluster core network of the wireless dispatcher, so as to establish a group call session;

The TCF of the home cluster core network sends a group call establishment request message to the TCF of the group home cluster core network to establish a group call uplink session;

The TCF of the cluster core network to which the group belongs receives the group call establishment request message, and sends a group call establishment request message to the TCF of the cluster core network to which the wireless dispatcher belongs, so as to establish a group call downlink session.

After the TCF of the group belonging to the cluster core network sends the group call establishment request message to the TCF of the home cluster core network of the wireless dispatcher, it further includes:

After the group call downlink session from the cluster core network belonging to the group to the cluster core network of the wireless dispatching station is established, the uplink session establishment of the group call from the cluster core network belonging to the group to the cluster core network of the wireless dispatching station is completed. Afterwards, the cluster core network to which the group belongs sends a speech right notification message indicating that the wireless dispatcher is the speech right party to the TCF of the cluster core network where the wireless dispatcher belongs.

After the TCF of the home cluster core network of the wireless dispatcher sends the group call establishment request message carrying the wireless dispatcher number to the TCF of the visited cluster core network of the wireless dispatcher, it further includes:

After the group call session from the home cluster core network of the wireless dispatcher to the visited cluster core network of the wireless dispatcher is established, the wireless dispatcher sends the talk right to the TCF of the visited cluster core network where the wireless dispatcher is located Application message, to apply for the speaking right by modifying the group call session;

The TCF of the visited site cluster core network forwards the speaking right application message to the TCF of the home cluster core network of the wireless dispatcher;

The TCF of the home cluster core network of the wireless dispatcher sends a speaking right application message to the TCF of the group home cluster core network to create a new group call uplink session;

The TCF of the group belonging to the cluster core network decides to grant the wireless dispatching station the right to speak, and sends a speech right authorization message to the wireless dispatching station through the TCF of the wireless dispatching station’s home cluster core network and the TCF of the wireless dispatching station’s visiting cluster core network , the wireless dispatcher returns the speaking right authorization confirmation message, and when the TCF of the cluster core network at the wireless dispatching station receives the speaking right authorization confirmation message, it sends the speaking right authorization confirmation message to the cluster core network to which the group belongs, and communicates itself and The newly established group call uplink session between the cluster core network to which the group belongs is associated with the group call session from itself to the visited cluster core network of the wireless dispatching station.

After the TCF of the home cluster core network of the wireless dispatcher sends the speaking right authorization confirmation message to the group home cluster core network, it further includes:

The TCF of the cluster core network to which the group belongs receives the speech right authorization confirmation message, and sends a speech right notification message indicating that the wireless dispatcher is the speech party to the TCF of the cluster core network to which the wireless dispatcher belongs.

After the TCF of the group belonging to the cluster core network sends the notification message indicating that the wireless dispatching station is the speaking right party to the TCF of the belonging cluster core network of the wireless dispatching station, it further includes:

The wireless dispatcher sends a talk right release message to the TCF of the cluster core network where the wireless dispatcher is located, and releases the talk right by modifying the group call session;

The TCF of the visited site cluster core network of the wireless dispatcher forwards the speaking right release message to the TCF of the home cluster core network of the wireless dispatcher;

The TCF of the home cluster core network of the wireless dispatcher sends a talk right release message to the TCF of the group home cluster core network, to release the newly created group call uplink session between the two when granting the talk right for the wireless dispatcher;

After the TCF of the cluster core network belonging to the group sends a talk right release completion message to the TCF of the cluster core network of the wireless dispatcher, the TCF of the cluster core network of the wireless dispatcher passes through the TCF of the visited cluster core network of the wireless dispatcher in turn. The TCF sends a talk right release completion message to the wireless dispatcher, and the wireless dispatcher returns a talk right release confirmation message to the TCF of the home cluster core network through the TCF of the visited cluster core network. When the TCF of the home cluster core network of the wireless dispatcher After receiving the speaking right release confirmation message, associate the group call downlink session between itself and the cluster core network to which the group belongs and the group call session between itself and the visiting cluster core network of the wireless dispatching station.

After the TCF of the group belonging to the cluster core network sends the speech right release completion message to the TCF of the wireless dispatcher's home cluster core network, it further includes:

The TCF of the cluster core network to which the group belongs sends a talk right notification message indicating that the talk right is idle to the TCF of the cluster core network where the wireless dispatcher belongs.

The method further comprises:

During the group call process, the TCF of the home cluster core network of the wireless dispatcher receives the registration message sent by the TCF of the target cluster core network of the wireless dispatcher, and the registration type in the message is mobility-triggered registration. The TCF sends a group call establishment request message to establish a group call session; wherein, the trigger condition of the registration message is: the TCF of the target cluster core network of the wireless dispatcher receives the eMME/TCF of the source cluster core network of the wireless dispatcher The incoming relocation request message is forwarded, and the message indicates that the terminal type is a wireless dispatcher; and,

The eMME/TCF of the core network of the target cluster sends a handover request message to the target eNB according to the target identifier carried in the forwarded relocation request message, and the target eNB sends a handover request message to the target cluster after receiving the radio resource control connection reconfiguration The TCF/eMME of the core network sends a handover notification;

The TCF of the target cluster core network sends a group call establishment request message to the wireless dispatcher to establish a group call session;

The TCF of the target cluster core network sends a wireless dispatcher switching result notification message to the TCF of the home cluster core network of the wireless dispatcher;

After the TCF of the home cluster core network of the wireless dispatcher receives the handover result notification message indicating that the handover is successful from the TCF of the target cluster core network, the TCF of the home cluster core network of the wireless dispatcher switches the path to the target cluster core The TCF of the network goes to the wireless dispatcher, and sends a group call release message to the TCF of the source cluster core network of the wireless dispatcher;

The TCF of the cluster core network where the wireless dispatcher belongs sends a wireless dispatcher logout message to the TCF of the source cluster core network of the wireless dispatcher.

It can be seen that the present application realizes the establishment of a group call when a roaming wireless dispatcher is included in the group.

Description of drawings

Fig. 1 is the flow chart of the location registration method of the roaming wireless dispatching station provided by the embodiment of the present application;

Fig. 2 is the flow chart of the group call establishment method when the members in the cluster group provided by the embodiment of the present application include a roaming wireless dispatcher, and the roaming wireless dispatcher is the group call listener (that is, the group call called);

Fig. 3 is a flow chart of a method for establishing a group call when the members in the cluster group include a roaming wireless dispatcher and the roaming wireless dispatcher is the calling party provided by the embodiment of the present application;

FIG. 4 is a flow chart of a method for a roaming wireless dispatcher to apply for a speaking right in a group call provided by an embodiment of the present application;

FIG. 5 is a flow chart of a method for releasing a speaking right in a group call by a roaming wireless dispatcher provided by an embodiment of the present application;

FIG. 6 is a flowchart of a handover method during a group call provided by an embodiment of the present application.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The roaming processing process of the wireless dispatching station provided by the present invention mainly includes: the cluster control function entity (TCF) of the home cluster core network of the wireless dispatching station receives the registration message sent by the TCF of the visited cluster core network of the wireless dispatching station, and the The registration message carries the location information of the cluster core network of the visited site, the terminal type indicated is the wireless dispatcher, and the registration type indicated is the initial registration, then it is judged as the initial registration of the wireless dispatcher, and the wireless dispatcher is sent to the wireless dispatcher after the registration is successful. The TCF of the cluster core network belonging to the group to which the group belongs sends a location registration message, and the location registration message carries the address of the TCF of the home cluster core network, wherein the registration message is: the TCF of the visited cluster core network receives A registration request from a wireless dispatcher, and the registration request reports that the terminal type is a wireless dispatcher, which is sent on behalf of the wireless dispatcher to the TCF of the cluster core network where the wireless dispatcher belongs.

Wherein, after the TCF of the home cluster core network sends the location registration message to the TCF of the cluster core network of the group to which the wireless dispatcher belongs, it may further include:

The TCF of the cluster core network at which the group belongs receives the group call establishment request message, and sends a report to the cluster core network of the wireless dispatcher according to the address of the TCF of the cluster core network of the wireless dispatcher carried in the location registration message. The TCF of the core network sends a group call establishment request message to establish a group call downlink session from the cluster core network at which the group belongs to the cluster core network at the home site of the wireless dispatcher;

The TCF of the home cluster core network of the wireless dispatcher receives the group call establishment request message sent by the TCF of the group's home cluster core network, and determines that the group members include the wireless dispatcher according to the group number carried by the message, and then sends the wireless dispatcher The TCF of the visited site cluster core network sends a group call establishment request message carrying the number of the wireless dispatcher to establish a group call session from the home cluster core network to the visited site cluster core network;

The TCF of the visited site cluster core network of the wireless dispatcher sends a group call establishment request message to the wireless dispatcher according to the wireless dispatcher number in the received group call establishment request message, so as to establish a call from the visited site cluster core network to the wireless dispatcher. station's group call session.

Wherein, after the TCF of the visited site cluster core network of the wireless dispatcher sends the group call establishment request message to the wireless dispatcher, it may further include:

After the group call downlink session from the cluster core network belonging to the group to the cluster core network of the wireless dispatching station is established, the TCF of the group belonging to the cluster core network sends a speaking right notification message to the TCF of the cluster core network of the wireless dispatching station ;

The TCF of the home cluster core network of the wireless dispatcher receives the right to speak message, determines that the group members include the wireless dispatcher, and sends the right to speak message carrying the wireless dispatcher number to the TCF of the visited cluster core network of the wireless dispatcher; The TCF of the cluster core network at the visited site sends a speaking right notification message to the wireless dispatching station according to the wireless dispatching station number in the received speaking right notification message.

Wherein, after the TCF of the home cluster core network sends the location registration message to the TCF of the cluster core network of the group to which the wireless dispatcher belongs, it may further include:

The wireless dispatcher sends a group call establishment request message to the TCF of the visited cluster core network to establish a group call session;

The TCF of the visited cluster core network forwards the group call establishment request message to the TCF of the home cluster core network of the wireless dispatcher, so as to establish a group call session;

The TCF of the home cluster core network sends a group call establishment request message to the TCF of the group home cluster core network to establish a group call uplink session;

The TCF of the cluster core network to which the group belongs receives the group call establishment request message, and sends a group call establishment request message to the TCF of the cluster core network to which the wireless dispatcher belongs, so as to establish a group call downlink session.

Wherein, after the TCF of the cluster core network where the group belongs to sends the group call establishment request message to the TCF of the cluster core network of the wireless dispatching station, it may further include:

After the group call downlink session from the cluster core network belonging to the group to the cluster core network of the wireless dispatching station is established, the uplink session establishment of the group call from the cluster core network belonging to the group to the cluster core network of the wireless dispatching station is completed. Afterwards, the cluster core network to which the group belongs sends a speech right notification message indicating that the wireless dispatcher is the speech right party to the TCF of the cluster core network where the wireless dispatcher belongs.

Wherein, after the TCF of the home cluster core network of the wireless dispatcher sends the group call establishment request message carrying the number of the wireless dispatcher to the TCF of the visited cluster core network of the wireless dispatcher, it may further include:

After the group call session from the home cluster core network of the wireless dispatcher to the visited cluster core network of the wireless dispatcher is established, the wireless dispatcher sends the talk right to the TCF of the visited cluster core network where the wireless dispatcher is located Application message, to apply for the speaking right by modifying the group call session;

The TCF of the visited site cluster core network forwards the speaking right application message to the TCF of the home cluster core network of the wireless dispatcher;

The TCF of the home cluster core network of the wireless dispatcher sends a speaking right application message to the TCF of the group home cluster core network to create a new group call uplink session;

The TCF of the group belonging to the cluster core network decides to grant the wireless dispatching station the right to speak, and sends a speech right authorization message to the wireless dispatching station through the TCF of the wireless dispatching station’s home cluster core network and the TCF of the wireless dispatching station’s visiting cluster core network , the wireless dispatcher returns the speaking right authorization confirmation message, and when the TCF of the cluster core network at the wireless dispatching station receives the speaking right authorization confirmation message, it sends the speaking right authorization confirmation message to the cluster core network to which the group belongs, and communicates itself and The newly established group call uplink session between the cluster core network to which the group belongs is associated with the group call session from itself to the visited cluster core network of the wireless dispatching station.

Wherein, after the TCF of the home cluster core network of the wireless dispatching station sends the speaking right authorization confirmation message to the group home cluster core network, it may further include:

The TCF of the cluster core network to which the group belongs receives the speech right authorization confirmation message, and sends a speech right notification message indicating that the wireless dispatcher is the speech party to the TCF of the cluster core network to which the wireless dispatcher belongs.

Wherein, after the TCF of the group belonging to the cluster core network sends the notification message indicating that the wireless dispatching station is the speech right party to the TCF of the cluster core network of the wireless dispatching station, it may further include:

The wireless dispatcher sends a talk right release message to the TCF of the cluster core network where the wireless dispatcher is located, and releases the talk right by modifying the group call session;

The TCF of the visited site cluster core network of the wireless dispatcher forwards the speaking right release message to the TCF of the home cluster core network of the wireless dispatcher;

The TCF of the home cluster core network of the wireless dispatcher sends a talk right release message to the TCF of the group home cluster core network, to release the newly created group call uplink session between the two when granting the talk right for the wireless dispatcher;

After the TCF of the cluster core network belonging to the group sends a talk right release completion message to the TCF of the cluster core network of the wireless dispatcher, the TCF of the cluster core network of the wireless dispatcher passes through the TCF of the visited cluster core network of the wireless dispatcher in turn. The TCF sends a talk right release completion message to the wireless dispatcher, and the wireless dispatcher returns a talk right release confirmation message to the TCF of the home cluster core network through the TCF of the visited cluster core network. When the TCF of the home cluster core network of the wireless dispatcher After receiving the speaking right release confirmation message, associate the group call downlink session between itself and the cluster core network to which the group belongs and the group call session between itself and the visiting cluster core network of the wireless dispatching station.

Wherein, after the TCF of the cluster core network to which the group belongs sends the speech right release completion message to the TCF of the cluster core network of the wireless dispatching station, it further includes:

The TCF of the cluster core network to which the group belongs sends a talk right notification message indicating that the talk right is idle to the TCF of the cluster core network where the wireless dispatcher belongs.

In addition, during the group call process, the TCF of the home cluster core network of the wireless dispatcher receives the registration message sent by the TCF of the target cluster core network of the wireless dispatcher, and the registration type in the message is mobility-triggered registration. The TCF of the core network sends a group call establishment request message to establish a group call session; wherein, the trigger condition of the registration message is: the TCF of the target cluster core network of the wireless dispatcher receives the eMME of the source cluster core network of the wireless dispatcher /Forward the relocation request message sent by the TCF, and the message indicates that the terminal type is a wireless dispatcher; and,

The eMME/TCF of the core network of the target cluster sends a handover request message to the target eNB according to the target identifier carried in the forwarded relocation request message, and the target eNB sends a handover request message to the target cluster after receiving the radio resource control connection reconfiguration The TCF/eMME of the core network sends a handover notification;

The TCF of the target cluster core network sends a group call establishment request message to the wireless dispatcher to establish a group call session;

The TCF of the target cluster core network sends a wireless dispatcher switching result notification message to the TCF of the home cluster core network of the wireless dispatcher;

After the TCF of the home cluster core network of the wireless dispatcher receives the handover result notification message indicating that the handover is successful from the TCF of the target cluster core network, the TCF of the home cluster core network of the wireless dispatcher switches the path to the target cluster core The TCF of the network goes to the wireless dispatcher, and sends a group call release message to the TCF of the source cluster core network of the wireless dispatcher;

The TCF of the cluster core network where the wireless dispatcher belongs sends a wireless dispatcher logout message to the TCF of the source cluster core network of the wireless dispatcher.

Fig. 1 is the flow chart of the location registration method of the roaming wireless dispatching station provided by the embodiment of the present application, and its specific steps are as follows:

Step 101: The wireless dispatcher roams to the visited cluster core network and starts it up. The TCF (Trunking Control Function, cluster control function entity) of the visited cluster core network of the wireless dispatcher receives an instruction from the wireless dispatcher that the terminal type is wireless After the registration request message of the dispatching station, the wireless dispatching station sends a SIP (Session Initiation Protocol, session initialization protocol) Register (registration) message to the TCF of the cluster core network of the wireless dispatching station on behalf of the wireless dispatching station, and the Register message carries the address of the cluster core network of the visiting place In the location information, the carried terminal type indicates wireless dispatcher, and the carried registration type indicates initial registration.

Step 102: The TCF of the home cluster core network of the wireless dispatcher receives the SIP Register message, and sends a SIP 401 Unauthorized (unauthenticated) message to the TCF of the visited cluster core network of the wireless dispatcher, requiring authentication and carrying WWW -Authenticate (authentication) header field, which initiates an authentication challenge in the form of a standard SIP digest.

Step 103: After receiving the registration request message sent again by the wireless dispatcher, the TCF of the visited cluster core network of the wireless dispatcher sends a SIP Register message to the TCF of the home cluster core network of the wireless dispatcher to apply for service registration, The message carries the Authorization header field.

Step 104: The TCF of the home cluster core network of the wireless dispatcher determines that the wireless dispatcher has passed the authentication, and returns a SIP 200 OK message to the TCF of the visited cluster core network of the wireless dispatcher.

Step 105: The TCF of the cluster core network where the wireless dispatcher belongs is determined as the initial registration of the wireless dispatcher according to the terminal type and registration type carried in the received SIP Register message, and then reports to the group belonging to the cluster core network of the group to which the wireless dispatcher belongs. The TCF sends a SIP Message message for location registration. The SIP Message message carries the address of the TCF of the cluster core network where the wireless dispatcher belongs, and optionally carries the group number of the group to which the wireless dispatcher belongs under the cluster core network. .

Step 106: The TCF of the cluster core network to which the group belongs receives the SIP Message, and returns a SIP 200 OK message to the TCF of the cluster core network to which the wireless dispatcher belongs.

It can be seen from the process shown in Figure 1 that when the wireless dispatcher starts up under the cluster core network of the visited site, the TCF of the visited cluster core network of the wireless dispatcher registers with the cluster core network of its home on behalf of the wireless dispatcher, and the wireless dispatcher If the home cluster core network of the wireless dispatcher determines that it is a wireless dispatcher, it will register the location with the group home core network of the group to which the wireless dispatcher belongs, and notify the group home cluster core network of the location information of the home cluster core network of the wireless dispatcher, so as to use Determine the group call area when establishing a group call.

Fig. 2 is the flow chart of the method for establishing a group call when the members in the cluster group provided by the embodiment of the present application include a roaming wireless dispatcher and the roaming wireless dispatcher is the listener of the group call (that is, the called party of the group call), the specific steps are as follows :

Steps 201a-204a: The TCF of the cluster core network where the group belongs receives the group call establishment request message, and sends a SIP Invite (invite) message to the TCF of the cluster core network where the wireless terminal is currently located, and the Invite message carries the current group call group Number, calling number, call identification, call type, call priority and other information, wherein, the call type indication is a group call, and the media direction in the SDP message body is send only (send only), etc., to establish a group call downlink session; The TCF of the cluster core network where the wireless terminal is currently located receives the SIP Invite message, and returns a SIP 100 Trying message to the TCF of the cluster core network to which the wireless terminal is currently located; The TCF of the cluster core network returns a SIP 200OK message; the TCF of the group belonging to the cluster core network receives the SIP 200OK message, and returns a SIP ACK confirmation message to the TCF of the cluster core network where the wireless terminal visits.

The SIP 100Trying message is a provisional response message, and the SIP 200ok message is a final response message.

So far, through steps 201a-204a, the group call downlink session is established from the cluster core network where the group belongs to the cluster core network where the wireless terminal visits.

Steps 201b-204b: The TCF of the cluster core network where the group belongs sends a SIP Invite message to the TCF of the cluster core network where the wireless dispatcher belongs. The Invite message carries the current group call group number, calling number, call identifier, call type, call Priority and other information, the media direction in the SDP message body is sendonly (send only), so as to establish a group call downlink session; the TCF of the cluster core network at which the wireless dispatcher belongs receives the SIP Invite message, and sends the SIP Invite message to the cluster core network at which the group belongs The TCF returns a SIP 100Trying message; the TCF of the cluster core network at which the wireless dispatcher belongs returns a SIP 200OK message to the TCF at the cluster core network at which the group belongs; The TCF of the cluster core network returns a SIP 200OK message.

So far, through steps 201b to 204b, the group call downlink session from the cluster core network to which the group belongs to the cluster core network to which the wireless dispatcher belongs is established.

Steps 201a-204a are performed in parallel with steps 201b-204b.

Step 205b: The TCF of the home cluster core network of the wireless dispatcher determines that the group members include the wireless dispatcher, and then sends a SIP Invite message to the TCF of the visited cluster core network of the wireless dispatcher. The message carries the group number of the current group call, Calling number, call type: group call, call ID, call priority, wireless dispatching station number, etc., to notify the TCF of the visiting cluster core network of the wireless dispatching station to establish a group call.

Step 206b: The TCF of the visited cluster core network of the wireless dispatcher receives the SIP Invite message, and returns a SIP 100 Trying message to the TCF of the home cluster core network of the wireless dispatcher.

Step 207b: According to the wireless dispatcher number in the SIP Invite message, the TCF of the cluster core network where the wireless dispatcher visits determines that the message is only used to establish a session with the wireless dispatcher, and is not used as a wireless dispatcher under the cluster core network. After establishing the group call downlink resource, the terminal forwards the SIP Invite message to the wireless dispatcher.

Step 208b: The wireless dispatcher receives the SIP Invite message, and returns a SIP 100Trying message to the TCF of the cluster core network of the wireless dispatcher's visited location.

Steps 209b-210b: the wireless dispatcher sends a SIP 200OK message to the TCF of the home cluster core network of the wireless dispatcher through the TCF of the visited cluster core network of the wireless dispatcher.

Steps 211b-212b: The TCF of the home cluster core network of the wireless dispatcher receives the SIP 200 OK message, and returns a SIP ACK message to the wireless dispatcher through the TCF of the visited cluster core network of the wireless dispatcher to confirm call establishment.

So far, through steps 205b-212b, the group call session from the home cluster core network of the wireless dispatcher to the visited cluster core network of the wireless dispatcher to the wireless dispatcher is established.

Steps 213a to 214a: The TCF of the group belonging to the cluster core network sends a SIP Info message to the TCF of the visited cluster core network where the wireless terminal is currently located. The currently visited cluster core network returns a SIP 200 OK message to the cluster core network to which the group belongs.

Thereafter, the TCF of the cluster core network in the visited location of the wireless terminal notifies the wireless terminal of the speaking right.

The speaking right notification information is used to indicate the occupancy of the speaking right in the current group, and when the speaking right is occupied, it indicates who is the speaking party, that is, who is the speaker.

Steps 213b to 214b: The TCF belonging to the cluster core network of the group sends a SIP Info message to the TCF of the cluster core network at which the wireless dispatcher belongs. The TCF of the cluster core network to which the group belongs receives the SIP Info message, and returns a SIP 200 OK message to the TCF of the cluster core network to which the group belongs.

Steps 215b to 218b: The TCF determination group members of the home cluster core network of the wireless dispatcher include the wireless dispatcher, and send a SIP Info message to the TCF of the visited cluster core network of the wireless dispatcher, and the message carries the speaking right notification information (including: Speaking right notification identification, speaking right type: occupation, speaking right party identification) and the number of the wireless dispatching station, to indicate that the message is only used as a speaking right notification to the wireless dispatching station, not as a speaking right notification to the wireless terminal, and does not need to be shared by the downlink The channel is sent to the wireless terminal; the TCF of the visited cluster core network of the wireless dispatcher receives the SIP Info message, and only forwards the SIP Info message to the wireless dispatcher according to the number of the wireless dispatcher carried in the message; the wireless dispatcher receives the SIPInfo message, and return a SIP 200ok message to the TCF of the home cluster core network of the wireless dispatcher through the TCF of the visited cluster core network of the wireless dispatcher.

So far, through steps 215b-218b, the notification of the right to speak to the wireless dispatching station by the cluster core network at the home location of the wireless dispatching station is completed.

From the process shown in Figure 2, it can be seen that the group belonging cluster core network does not distinguish the terminal type of the group members: wireless terminal or wireless dispatcher, but establishes a group call downlink session according to the location information reported by the group members. That is, for a wireless terminal, establish a group call downlink session with the cluster core network of the wireless terminal's visiting location; The TCF of the dispatcher's home cluster core network establishes a group call session with the wireless dispatcher's visited cluster core network according to the terminal type: wireless dispatcher, and then establishes a group call session with the wireless dispatcher. Wherein, the cluster core network to which the group belongs sends a downlink group call to the corresponding cluster core network: the cluster core network at the home site according to the location information reported by the wireless dispatcher through the location registration process described in Figure 1: the address of the TCF of the cluster core network at the home site Create a request.

Fig. 3 is the flow chart of the method for establishing a group call when the members in the cluster group provided by the embodiment of the present application include a roaming wireless dispatcher and the roaming wireless dispatcher acts as a caller, the specific steps are as follows:

Steps 301-302: The wireless dispatcher sends a SIPInvite message to the TCF of the visited cluster core network where it is located to establish a group call uplink session. The media direction in the SDP message body is send only; the TCF of the visited cluster core network receives the message The SIP Invite message returns the SIP 100 Trying message to the wireless dispatcher.

The media type carried in the SIP Invite message sent by the wireless dispatcher is send only, indicating that the wireless dispatcher is only the media sender.

Steps 303-304: The TCF of the visited cluster core network of the wireless dispatcher forwards the SIP Invite message to the TCF of the home cluster core network of the wireless dispatcher to establish a group call uplink session; the home cluster core network of the wireless dispatcher The TCF of the wireless dispatcher receives the SIP Invite message, and returns a SIP100Trying message to the TCF of the cluster core network of the wireless dispatcher station.

Steps 305-306: The TCF of the cluster core network at which the wireless dispatcher belongs sends a SIP Invite message to the TCF of the group belonging to the cluster core network to establish a group call uplink session; the TCF of the group belonging to the cluster core network receives the SIPInvite message and sends The TCF of the cluster core network where the wireless dispatcher belongs returns a SIP 100 Trying message.

Steps 307a-310a: The TCF of the cluster core network where the group belongs assigns the call identifier and call priority, and sends a SIP Invite message to the TCF of the cluster core network where the wireless dispatcher belongs to, so as to establish a group call downlink session; the belonging of the wireless dispatcher The TCF of the cluster core network receives the SIP Invite message, and returns a SIP100Trying message to the TCF of the cluster core network belonging to the group; the TCF of the cluster core network of the wireless dispatcher sends a SIP200OK message to the TCF of the cluster core network of the group; the group belongs to the cluster The TCF of the core network returns a SIP ACK message to the TCF of the cluster core network where the wireless dispatcher belongs.

So far, through steps 307a to 310a, the group call downlink session from the cluster core network to which the group belongs to the cluster core network to which the wireless dispatcher belongs is established.

Steps 307b to 310b: The TCF of the cluster core network where the group belongs to sends a SIP Invite message to the TCF of the visited cluster core network where the wireless terminal is currently located to establish a group call downlink session; The TCF of the cluster core network returns a SIP 100 Trying message; the TCF of the cluster core network where the wireless terminal visits sends a SIP 200OK message to the TCF of the group belonging to the cluster core network; TCF returns a SIP ACK message.

So far, through steps 307b-310b, the group call downlink session is established from the cluster core network where the group belongs to the cluster core network where the wireless terminal is currently located.

Steps 311-316: After receiving the SIP 200OK message indicating that any group call downlink session has been established, the TCF of the cluster core network where the group belongs passes through the TCF of the cluster core network of the wireless dispatcher in turn and the TCF of the cluster core network of the visited site. Send a SIP 200OK message to the wireless dispatcher; the wireless dispatcher returns a SIPACK message to the TCF of the cluster core network to which the group belongs through the TCF of the visited cluster core network of the wireless dispatcher and the TCF of the cluster core network of the wireless dispatcher in turn.

So far, the uplink session of the group call from the home cluster core network of the wireless dispatcher to the group home cluster core network, and the group call from the wireless dispatcher to the visited cluster core network of the wireless dispatcher to the home cluster core network of the wireless dispatcher The session is established. The TCF of the home cluster core network of the wireless dispatcher connects the group call sessions between the wireless dispatcher -> the visited cluster core network of the wireless dispatcher -> the home cluster core network of the wireless dispatcher and the group belonging cluster core network and The group call uplink session association between the home cluster core network of the wireless dispatcher.

Steps 317a to 318a: The cluster core network to which the group belongs sends a SIP Info message to the TCF of the cluster core network at which the wireless dispatcher belongs. The message carries the speaking right notification identifier, the speaking right type: occupation, the speaker's identification (that is, the wireless dispatching station identification ); the TCF of the cluster core network where the wireless dispatcher belongs receives the SIP Info message, and returns a SIP 200OK message to the cluster core network to which the group belongs.

Since the wireless dispatcher is the speaking party, the TCF of the cluster core network where the wireless dispatcher belongs does not need to forward the SIP Info message to the wireless dispatcher.

Steps 317b to 318b: The TCF of the group belonging to the cluster core network sends a SIP Info message to the TCF of the cluster core network where the wireless terminal is currently visiting. ID of the dispatching station), so that the TCF of the cluster core network at the visited location notifies the wireless terminal of the speaking right, that is, notifies the wireless terminal that the current wireless dispatching station is the speaking right party.

It can be seen from the process described in Figure 3 that when the wireless dispatcher is roaming and establishes a group call as the calling party, the wireless dispatcher -> the wireless dispatcher's visited site cluster core network -> the wireless dispatcher's home cluster core network A group call session is established between the groups, and an uplink session is established between the cluster core network to which the group belongs and the cluster core network to which the wireless dispatcher belongs. The location information of the cluster core network) and the location information reported by the wireless dispatcher when the location registration is performed (the location information of the wireless dispatcher’s home cluster core network), and the wireless terminal’s visiting cluster core network and the attribution of the wireless dispatcher One group call downlink session is respectively established between the cluster core networks, and the TCF of the group belonging to the cluster core network completes the establishment of the group call uplink session after receiving the message that at least one group call downlink session is successfully established.

Fig. 4 is the flow chart of the method for the roaming wireless dispatching station applying for the right to speak in a group call provided by the embodiment of the present application, and its specific steps are as follows:

Steps 401-402: The wireless dispatcher sends a SIPre-Invite message to the TCF of the visited cluster core network where the wireless dispatcher is located, and the media direction in the SDP message body is sendrecv (send and receive); the TCF of the visited cluster core network receives The SIP re-Invite message returns a SIP 100 Trying message to the wireless dispatcher.

Steps 403-404: The TCF of the visited cluster core network of the wireless dispatcher forwards the SIP re-Invite message to the TCF of the home cluster core network of the wireless dispatcher; the TCF of the home cluster core network of the wireless dispatcher receives the SIP The re-Invite message returns a SIP 100 Trying message to the TCF of the cluster core network of the wireless dispatcher's visited location.

Steps 405-406: The TCF of the cluster core network where the wireless dispatcher belongs sends a SIP Invite message to the TCF of the cluster core network where the group belongs to create a new group call uplink session. The media direction in the SDP message body is sendrecv; the group belongs to the cluster The TCF of the core network receives the SIP Invite message, and returns a SIP 100 Trying message to the TCF of the cluster core network where the wireless dispatcher belongs.

Steps 407-412: The TCF decision of the group belonging to the core network of the cluster grants the wireless dispatching station the right to speak, and sends to the wireless dispatching station through the TCF of the cluster core network at which the wireless dispatching station belongs and the TCF of the visiting cluster core network of the wireless dispatching station. The SIP 200OK message carries the speech right authorization identifier; the wireless dispatcher returns a SIP ACK message to the TCF of the group's home cluster core network through its own TCF of the visited cluster core network and the TCF of the home cluster core network in turn.

So far, through steps 401-412, the wireless dispatcher successfully applies for the speaking right. The TCF of the home cluster core network of the wireless dispatcher connects the newly created group call uplink session between the home cluster core network of the wireless dispatcher and the group home cluster core network and the home cluster core network of the wireless dispatcher -> wireless dispatcher Group call session association between cluster core network -> wireless dispatching station.

Steps 413a to 414a: The TCF of the cluster core network belonging to the group sends a SIP Info message to the TCF of the cluster core network of the wireless dispatching station, and the message carries the speaking right notification information (that is, indicating that the wireless dispatching station is the speaking party); the wireless dispatching station The TCF of the cluster core network to which the group belongs returns a SIP 200 OK message to the TCF of the cluster core network to which the group belongs.

Since the wireless dispatcher is the speaking party, the TCF of the cluster core network where the wireless dispatcher belongs does not need to forward the SIP Info message to the wireless dispatcher.

Steps 413b-414b: The TCF of the cluster core network to which the group belongs sends a SIP Info message to the TCF of the wireless terminal's visited cluster core network, so that the TCF of the wireless terminal's visited cluster core network notifies the wireless terminal of the speaking right, that is, notifies The current wireless dispatcher of the wireless terminal is the speaking party.

From the process shown in Figure 4, it can be seen that when the wireless dispatcher applies for the right to speak in a group call, the wireless dispatcher -> the wireless dispatcher's visiting site cluster core network -> the wireless dispatcher's home cluster core network uses Session modification (i.e. using the re-INVITE message) method, a new group call uplink session (i.e. using the Invite method) between the cluster core network of the wireless dispatcher's home and the group's belonging cluster core network; after the wireless dispatcher obtains the right to speak , the original one-way group call downlink session is maintained between the cluster core network to which the group belongs and the cluster core network to which the wireless dispatcher belongs, and the TCF of the cluster core network to which the wireless dispatcher belongs The newly created group call uplink session between the cluster core networks is associated with the group call session between the home cluster core network of the wireless dispatcher -> the visiting cluster core network of the wireless dispatcher -> the wireless dispatcher.

Fig. 5 is the flow chart of the method for the roaming wireless dispatcher to release the speaking right in the group call provided by the embodiment of the present application, and its specific steps are as follows:

Steps 501-502: The wireless dispatcher sends a SIPre-Invite message to the TCF of the visited cluster core network where the wireless dispatcher is located, and the media direction carried in the message body is recvonly; the TCF of the visited cluster core network of the wireless dispatcher receives the message The SIP re-Invite message returns the SIP 100 Trying message to the wireless dispatcher.

Steps 503-504: The TCF of the visited cluster core network of the wireless dispatcher forwards the SIP re-Invite message to the TCF of the home cluster core network of the wireless dispatcher; the TCF of the home cluster core network of the wireless dispatcher receives the SIP The re-Invite message returns a SIP 100 Trying message to the TCF of the cluster core network of the wireless dispatcher's visited site.

Steps 505-510: The TCF of the cluster core network where the wireless dispatcher belongs sends a SIP Bye (goodbye) message to the TCF of the group-owned cluster core network to release the group call uplink session; the TCF of the group-owned cluster core network receives the SIP Bye message, and send a SIP 200OK message to the TCF of the cluster core network of the wireless dispatcher’s home site to release the current talk right; The station sends a SIP200OK message; the wireless dispatcher returns a SIP ACK message to the TCF of the home cluster core network through the TCF of the visited cluster core network to confirm the release of the speaking right.

So far, the right to speak of the wireless dispatching station has been successfully released. The TCF of the home cluster core network of the wireless dispatcher will group the group call downlink session between the home cluster core network and the home cluster core network of the wireless dispatcher and the home cluster core network of the wireless dispatcher -> the visit of the wireless dispatcher Ground cluster core network -> group call session association between wireless dispatching stations.

Steps 511a to 512a: If there is currently no speaking right queuing user, the TCF of the group belonging to the cluster core network sends a SIP Info message to the TCF of the cluster core network where the wireless dispatcher belongs. The message carries the speaking right type: idle; the wireless dispatcher's The TCF of the home cluster core network receives the SIP Info message, and returns a SIP 200 OK message to the group home cluster core network.

Since the right to speak of the wireless dispatcher is released, the SIP Info message carried in the SIP Info message sent by the TCF belonging to the cluster core network of the group is idle, and the TCF of the cluster core network where the wireless dispatcher belongs does not need to forward the SIP Info to the wireless dispatcher information.

Steps 511b-512b: The TCF of the group belonging to the cluster core network sends a SIP Info message to the TCF of the visited cluster core network where the wireless terminal is currently located, and the message carries the type of speaking right: idle, so that the TCF of the visited cluster core network of the wireless terminal Notify the wireless terminal of the right to speak.

It can be seen from the process shown in Figure 5 that when the wireless dispatcher releases the right to speak in a group call, the wireless dispatcher -> the wireless dispatcher's visiting site cluster core network -> the wireless dispatcher's home cluster core network uses In session modification (that is, using re-INVITE message), the group call downlink session is maintained between the home cluster core network of the wireless dispatcher and the cluster core network to which the group belongs, and the group call uplink session established when the wireless dispatcher applies for the speaking right is released.

Figure 6 is a flow chart of the switching method in the group call process provided by the embodiment of the present application, and its specific steps are as follows:

Step 601: The wireless dispatcher sends a measurement report (measurement report) message to the source eNB (Evolved Node B, evolved base station), and the message carries the current measurement result of the wireless dispatcher.

Step 602: The source eNB receives the measurement report message, determines that the wireless dispatcher will perform S1 handover, and then sends a handover required (handover request) to the eMME (Evolved Move Management Entity, enhanced mobile management entity) of the source cluster core network of the wireless dispatcher information.

Step 603: The eMME of the source cluster core network of the wireless dispatcher receives the handover required message, selects the target cluster core network to switch to, and sends a Forward Relocation Request message to the eMME of the target cluster core network, Forward Relocation Request The message carries terminal type: wireless dispatcher, and carries information such as the context of the wireless dispatcher, target eNB ID, Target TAI (Target Tracking Area ID), and source-to-target transparent container.

Steps 604-605: The eMME/TCF of the target cluster core network of the wireless dispatcher receives the ForwardRelocation Request message, learns that the terminal type is a wireless dispatcher, determines its belonging cluster core network according to the number of the wireless dispatcher, and reports to the wireless dispatcher the attribution The TCF of the local cluster core network sends a SIP Register message, carrying the terminal type, and the registration type carried is registration triggered by mobility; the TCF of the local cluster core network of the wireless dispatcher receives the SIP Register message, and sends a message to the target cluster of the wireless dispatcher. The TCF of the core network returns a SIP 200OK message.

Steps 606-609: The TCF of the cluster core network where the wireless dispatcher belongs sends a SIP Invite message to the TCF of the target cluster core network of the wireless dispatcher to establish a group call session; the TCF of the target cluster core network of the wireless dispatcher receives the SIP Invite message, and return a SIP 100 Trying message to the TCF of the cluster core network at which the wireless dispatcher belongs; the TCF of the target cluster core network of the wireless dispatcher sends a SIP 200OK message to the TCF of the cluster core network at which the wireless dispatcher belongs; The TCF of the ground cluster core network receives the SIP 200 OK message, and returns a SIP ACK message to the TCF of the target cluster core network of the wireless dispatcher.

So far, the group call session between the home cluster core network of the wireless dispatcher and the target cluster core network of the wireless dispatcher is established.

Steps 610-611: The TCF/eMME of the target cluster core network of the wireless dispatcher sends a Handover Request message to the target eNB; the target eNB receives the Handover Request message, creates a wireless dispatcher context, and sends the eMME of the target cluster core network of the wireless dispatcher /TCF returns Handover Request ACK message.

Step 612: The TCF/eMME of the target cluster core network of the wireless dispatcher returns a Forward Relocation Response message to the TCF/eMME of the source cluster core network.

Step 613: The TCF/eMME of the source cluster core network of the wireless dispatcher sends a Handover Command (handover command) to the source eNB.

Step 614: The source eNB receives the Handover Command, and sends an RRC ConnectionReconfiguration (radio resource control connection reconfiguration) message to the wireless dispatcher.

Step 615: The source eNB sends an eNB Status Transfer (eNB status transfer) message to the eMME/TCF of the source cluster core network.

Steps 616-617: The eMME/TCF of the source cluster core network receives the eNB Status Transfer message, and sends a Forward Access Context Notification message to the eMME/TCF of the target cluster core network; the eMME/TCF of the target cluster core network Return a Forward Access ContextACK message to the TCF of the core network of the source cluster.

Step 618: The eMME/TCF of the target cluster core network sends an MME status Transfer (Mobility Management Entity Status Transfer) message to the target eNB.

Step 619: The wireless dispatcher sends an RRC Connection ReconfigurationComplete (radio resource control connection reconfiguration complete) message to the target eNB.

Step 620: the target eNB sends a Handover Notify (handover notification) message to the eMME/TCF of the target cluster core network.

Steps 621-622: The eMME/TCF of the target cluster core network receives the Handover Notify message, and sends a Forward Access Complete Notification message to the eMME/TCF of the source cluster core network; the eMME/TCF of the source cluster core network sends The eMME/TCF of the target cluster core network returns a Forward AccessComplete ACK (forward access complete acknowledgment) message.

Steps 610 to 622 are standard procedures of LTE, for details, refer to 3GPP S1 handover procedure.

Steps 623-626: The TCF of the target cluster core network of the wireless dispatcher sends a SIP Invite message to the wireless dispatcher to establish a group call session; the wireless dispatcher returns a SIP100Trying message to the TCF of the target cluster core network; the wireless dispatcher sends a SIP Invite message to the target cluster core The TCF of the network sends a SIP 200OK message; the TCF of the target cluster core network returns a SIP ACK message to the wireless dispatcher.

So far, the group call session between the target cluster core network of the wireless dispatcher and the wireless dispatcher is established.

Steps 627-628: The TCF of the target cluster core network of the wireless dispatcher sends a SIP message to the TCF of the home cluster core network of the wireless dispatcher to notify the wireless dispatcher of the switching result; the TCF of the home cluster core network of the wireless dispatcher Return a SIP200OK message to the TCF of the core network of the target cluster.

Steps 629-632: If the handover is successful, the TCF of the home cluster core network of the wireless dispatcher switches the path to the target cluster core network -> wireless dispatcher, and sends a SIP Bye message to the TCF of the source cluster core network to remove both The group call session between them; the TCF of the source cluster core network returns a SIP 200OK message to the TCF of the home cluster core network; the TCF of the home cluster core network of the wireless dispatcher sends SIP Options (logout) to the TCF of the source cluster core network message to notify the TCF of the source cluster core network to log out of the wireless dispatcher, the message indicates that the logout is triggered by mobility, and there is no need to send a logout message to the wireless dispatcher; the TCF of the source cluster core network returns a SIP to the TCF of the home cluster core network 200 OK message.

So far, the group call session established for the wireless dispatcher between the home cluster core network of the wireless dispatcher and the source cluster core network is removed, and the wireless dispatcher is logged out on the source cluster core network.

Steps 633-634: After the eMME/TCF of the source cluster core network completes the TAU (Tracking Area Update, tracking area update) process in the wireless dispatcher, it sends a UE Context Release Command (User Equipment Context Release) message to the source eNB; the source eNB releases and The resources related to the wireless dispatcher return a UEContext Release Complete message to the eMME/TCF of the core network of the source cluster.

It can be seen from the process shown in Figure 6 that the wireless dispatcher remains connected during the group call process. If it moves to another visited cluster core network during the call process, the wireless link is switched through the public network switching process. During the process, the target cluster core network of the wireless dispatcher performs cluster registration with its home cluster core network on behalf of the wireless dispatcher (the registration type is mobility-triggered registration), but no location registration is required, and the home cluster core network is responsible for the group call The reconstruction of the target cluster core network -> the group call session between the wireless dispatcher, the target cluster core network notifies the switch result to the cluster core network of the wireless dispatcher, after the switch is successful, the cluster core network of the wireless dispatcher belongs The TCF switches the path to the target cluster core network - the wireless dispatcher, releases the group call session established between the home cluster core network and the source cluster core network for the wireless dispatcher, the source cluster core network logs off the wireless dispatcher, and releases the corresponding UE context.

It should be noted that, for a wireless terminal, if it moves to a new visited cluster core network (target visited cluster core network) in the connected state, the target visited cluster core network of the wireless terminal will report to it during the handover process. The local cluster core network acts as a proxy for cluster registration, and the home cluster core network needs to register its location with the group home cluster core network, and notify the location information of the target visited site cluster core network, and the group home cluster core network is responsible for the expansion of the group call; in addition, the wireless The cluster core network where the terminal belongs also needs to send a group information update to the target cluster core network, and notify the target cluster core network of the group information to which the user belongs, so as to determine the group call area when a subsequent group call is initiated.

It can be seen that in this application, the wireless dispatcher is defined separately as a type of terminal. When the wireless dispatcher initiates initial registration in the visiting cluster core network, the home cluster core network determines that it is a wireless dispatcher according to the reported terminal type, then The location of the home cluster core network (the address of the TCF of the home cluster core network) is registered with the group home cluster core network. During the group call establishment process, the cluster core network belonging to the group does not distinguish the terminal type of the group members (wireless terminal or wireless dispatcher), and establishes a group call downlink session according to the location information registered during the initial registration of the group members. The cluster core network is responsible for establishing a group call session to the wireless dispatcher via the cluster core network visited by the wireless dispatcher. When the wireless dispatcher is used as the group call caller, group call called, and speaker right user, respectively establish the association relationship between the group call uplink/downlink session and the D interface session between the core network of the cluster, and the wireless dispatcher during the switching process The home cluster core network is responsible for the reconstruction of the group call. After the handover is successful, the TCF of the home cluster core network of the wireless dispatcher will switch the path to the target cluster core network - the wireless dispatcher.

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

Claims (10)

1. a kind of wireless dispatching desk roams processing method, which is characterized in that this method includes:

The clustered control functional entity TCF of the ownership place cluster core net of wireless dispatching desk receives the visited place of wireless dispatching desk The registration message that the TCF of cluster core net is sent, the registration message carry the location information of the visited place cluster core net, take The terminal type of band is designated as wireless dispatching desk, and the registration type carried is designated as initial registration, then is determined as wireless dispatching Platform initial registration sends location register to the TCF for the group ownership cluster core net organized belonging to wireless dispatching desk after succeeding in registration and disappears Breath, location register message carry the address of the TCF of the ownership place cluster core net,

Wherein, the registration message is:The TCF of the visited place cluster core net receives the registration request of wireless dispatching desk, and It is wireless dispatching desk that terminal type has been reported in the registration request, then represents ownership place of the wireless dispatching desk to wireless dispatching desk What the TCF of cluster core net was sent.

2. according to the method described in claim 1, it is characterized in that, the TCF of the ownership place cluster core net is to wireless dispatching The TCF for the group ownership cluster core net organized belonging to platform further comprises after sending location register message:

The TCF of described group of ownership cluster core net receives group calling and establishes request message, according to the location register message The address of the TCF of the ownership place cluster core net of the wireless dispatching desk carried, to the ownership place cluster core of wireless dispatching desk The TCF transmission groups of heart net, which are exhaled, establishes request message, with establish described group of ownership cluster core net to wireless dispatching desk ownership place The group of cluster core net exhales downlink session;

The TCF of the ownership place cluster core net of wireless dispatching desk receives the group that the TCF of described group of ownership cluster core net is sent and exhales Request message is established, the group number judgement group membership carried according to the message includes wireless dispatching desk, then visiing to wireless dispatching desk The group of the TCF transmission carrying wireless dispatching desk numbers of visit ground cluster core net, which is exhaled, establishes request message, to establish the ownership place The group of cluster core net to the visited place cluster core net exhales session;

The TCF of the visited place cluster core net of wireless dispatching desk exhales the wireless dispatching desk established in request message according to the group received Number exhales to wireless dispatching desk transmission group and establishes request message, to establish the visited place cluster core net to wireless dispatching desk Group exhale session.

3. according to the method described in claim 2, it is characterized in that, the visited place cluster core net of the wireless dispatching desk TCF, which exhales to establish after request message to wireless dispatching desk transmission group, to be further comprised:

It is described after a group group for ownership cluster core net to the ownership place cluster core net of wireless dispatching desk exhales downlink session establishment The TCF of group ownership cluster core net sends right of speech notification message to the TCF of the ownership place cluster core net of wireless dispatching desk;

The TCF of the ownership place cluster core net of wireless dispatching desk receives the right of speech notification message, and judgement group membership includes wireless Dispatching desk, the right of speech notice that carrying wireless dispatching desk number is sent to the TCF of the visited place cluster core net of wireless dispatching desk disappear Breath;The TCF of the visited place cluster core net is adjusted according to the wireless dispatching desk number in the right of speech notification message received to wireless It spends platform and sends right of speech notification message.

4. according to the method described in claim 1, it is characterized in that, the TCF of the ownership place cluster core net is to wireless dispatching The TCF for the group ownership cluster core net organized belonging to platform further comprises after sending location register message:

Wireless dispatching desk exhales to the TCF transmission groups of the visited place cluster core net and establishes request message, and session is exhaled to establish group;

The TCF of the visited place cluster core net forwards the group to exhale and builds to the TCF of the ownership place cluster core net of wireless dispatching desk Vertical request message, session is exhaled to establish group;

The TCF of the ownership place cluster core net is exhaled to the TCF transmission groups of described group of ownership cluster core net and is established request message, To establish group call uplink session;

The TCF of described group of ownership cluster core net, which receives the group and exhales, establishes request message, to the ownership place cluster of wireless dispatching desk The TCF transmission groups of core net, which are exhaled, establishes request message, and downlink session is exhaled to establish group.

5. according to the method described in claim 4, it is characterized in that, the TCF of described group of ownership cluster core net is to wireless dispatching The TCF transmission groups of the ownership place cluster core net of platform, which exhale to establish after request message, to be further comprised:

After a group group for ownership cluster core net to the ownership place cluster core net of wireless dispatching desk exhales downlink session establishment, complete Group call uplink session establishment of the group ownership cluster core net to the ownership place cluster core net of wireless dispatching desk.Later, described group It is right of speech side to belong to cluster core net to send instruction wireless dispatching desk to the TCF of the ownership place cluster core net of wireless dispatching desk Right of speech notification message.

6. according to the method described in claim 2, it is characterized in that, the ownership place cluster core net of the wireless dispatching desk The group that TCF sends carrying wireless dispatching desk number to the TCF of the visited place cluster core net of wireless dispatching desk exhales foundation request to disappear Further comprise after breath:

Wireless dispatching desk ownership place cluster core net to the visited place cluster core net of wireless dispatching desk to wireless dispatching desk Group exhale session establishment after, the TCF of the visited place cluster core net where from wireless dispatching desk to wireless dispatching desk sends right of speech Shen Please message, the application right of speech in such a way that modification group exhales session;

The TCF of the visited place cluster core net forwards the right of speech Shen to the TCF of the ownership place cluster core net of wireless dispatching desk It please message;

TCF application sending the right words of the TCF of the ownership place cluster core net of wireless dispatching desk to described group of ownership cluster core net Message, to create group call uplink session all the way;

The TCF decisions of group ownership cluster core net authorize wireless dispatching desk right of speech, and pass sequentially through the ownership place of wireless dispatching desk The TCF of the cluster core net and TCF of the visited place cluster core net of wireless dispatching desk sends right of speech mandate to wireless dispatching desk and disappears Breath, wireless dispatching desk returns to right of speech license confirmation message, when the TCF of the ownership place cluster core net of wireless dispatching desk receives right of speech After license confirmation message, the right of speech license confirmation message is sent to a group ownership cluster core net, and by itself and described group of ownership Between cluster core net create group call uplink session and itself exhale meeting to the group of the visited place cluster core net of wireless dispatching desk Words are associated.

7. according to the method described in claim 6, it is characterized in that, the ownership place cluster core net of the wireless dispatching desk TCF further comprises after sending the right of speech license confirmation message to a group ownership cluster core net:

The TCF of described group of ownership cluster core net receives the right of speech license confirmation message, to the ownership place collection of wireless dispatching desk The TCF of group's core net sends the right of speech notification message that instruction wireless dispatching desk is right of speech side.

8. the method according to the description of claim 7 is characterized in that the TCF of described group of ownership cluster core net is to wireless dispatching The TCF of the ownership place cluster core net of platform sends further packet after the right of speech notification message that instruction wireless dispatching desk is right of speech side It includes:

The TCF of visited place cluster core net where from wireless dispatching desk to wireless dispatching desk sends right of speech release message, with modification Group exhales the mode release speech right of session;

The TCF of the visited place cluster core net of wireless dispatching desk is forwarded to the TCF of the ownership place cluster core net of wireless dispatching desk The right of speech release message;

The TCF of the ownership place cluster core net of wireless dispatching desk sends right of speech release to the TCF of described group of ownership cluster core net Message is the group call uplink session created when wireless dispatching desk authorizes right of speech between the two to discharge;

The TCF of group ownership cluster core net sends right of speech release to the TCF of the ownership place cluster core net of wireless dispatching desk and completes After message, the TCF of the ownership place cluster core net of wireless dispatching desk passes sequentially through the visited place cluster core net of wireless dispatching desk TCF send right of speech Release complete to wireless dispatching desk, wireless dispatching desk is by the TCF of visited place cluster core net to returning The TCF of possession cluster core net returns to right of speech and discharges confirmation message, when the TCF of the ownership place cluster core net of wireless dispatching desk is received After discharging confirmation message to right of speech, downlink session and itself is exhaled to be adjusted to wireless itself group between group ownership cluster core net The group spent between the visited place cluster core net of platform exhales session association.

9. according to the method described in claim 8, it is characterized in that, the TCF of described group of ownership cluster core net is to wireless dispatching The TCF of the ownership place cluster core net of platform further comprises after sending right of speech Release complete:

The TCF of described group of ownership cluster core net sends instruction right of speech to the TCF of the ownership place cluster core net of wireless dispatching desk Idle right of speech notification message.

10. according to the method described in claim 1, it is characterized in that, the method further includes:

In group-calling process, the TCF of the ownership place cluster core net of wireless dispatching desk receives the target cluster core of wireless dispatching desk The registration message that the TCF of net is sent, the registration type in message is mobility triggering registration, then to target cluster core net TCF transmission groups, which are exhaled, establishes request message, and session is exhaled to establish group;Wherein, the trigger condition of the registration message is:Wireless dispatching The TCF of the target cluster core net of platform receives the forwarding that the eMME/TCF of the source cluster core net of wireless dispatching desk is sent and resets Position request message, and indicate that terminal type is wireless dispatching desk in the message;And

The target identification that the eMME/TCF of target cluster core net is carried according to forwarding RELOCATION REQUEST message, sends out to target eNB Send switching request message, target eNB after the wireless resource control connection reconfiguration for receiving wireless dispatching desk completes message, Switching notice is sent to the TCF/eMME of target cluster core net;

The TCF of target cluster core net is exhaled to wireless dispatching desk transmission group and is established request message, and session is exhaled to establish group;

The TCF of target cluster core net sends wireless dispatching desk switching to the TCF of the ownership place cluster core net of wireless dispatching desk Result notice message;

The TCF of the ownership place cluster core net of wireless dispatching desk receives the instruction switching that the TCF of target cluster core net is sent After successful switching result notification message, path is switched to object set by the TCF of the ownership place cluster core net of wireless dispatching desk The TCF of group's core net arrives wireless dispatching desk again, and the TCF transmission groups of the source cluster core net to wireless dispatching desk exhale release to disappear Breath;

The TCF of the ownership place cluster core net of wireless dispatching desk sends wireless to the TCF of the source cluster core net of wireless dispatching desk Dispatching desk logout message.