WO2020042585A1

WO2020042585A1 - Method and device for group service processing and group service area configuration

Info

Publication number: WO2020042585A1
Application number: PCT/CN2019/077617
Authority: WO
Inventors: 闫翠翠; 王玮
Original assignee: 中兴通讯股份有限公司
Priority date: 2018-08-31
Filing date: 2019-03-11
Publication date: 2020-03-05
Also published as: CN110876118A; CN110876118B

Abstract

Provided by the present invention are a method and device for group service processing and group service area configuration, wherein the group service processing method comprises: an MCPTT server receiving a group service request message initiated by an MCPTT client; the MCPTT server identifying a target service area corresponding to a group identifier and a cell identifier, and activating a TMGI corresponding to the target service area; the MCPTT server notifying a UE within a service group of the mapping relationship between the group identifier and the TMGI; the MCPTT server sending a TMGI activation message to a BM-SC; and the MCPTT server notifying the MCPTT client to receive data on a multicast transmission channel (MTCH) corresponding to the TMGI. In the present invention, by means of configuring a service defining area on the MCPTT server side, an MBSFN area is identified according to the position of a service initiator such that service initiation and conduction are limited all along to the service of a specific MA area, thereby overcoming the problem wherein an MCPTT service is incapable of adapting to a specific scenario.

Description

Method and device for group service processing and group service area configuration

Technical field

The present invention relates to the field of communications, and in particular, to a method and device for mission critical mission (Critical, Push, Talk, MCPTT) group service processing and group service area configuration.

Background technique

At present, a broadband digital trunking system based on Long Term Evolution (LTE) technology has become the development direction of the next generation trunking system, and relevant standards have been studied and formulated internationally. The 3rd Generation Partnership Project (3GPP) proposed on the basis of LTE technology a group communication / cluster communication standard framework (Group Communication System Enabler, GCSE), and formulated the MCPTT trunked voice service standard and enhanced Multimedia Broadcast Multicast Service (enhaused Multimedia Board Broadcast Multicast Service, eMBMS) specification. MCPTT regulates the implementation standard of PTT services in LTE networks. The call control process is designed at the application layer to achieve a complete voice trunking function. As a wireless-side technical solution, eMBMS provides a point-to-multipoint multimedia service technology that simultaneously transmits the same type of service from a data service source to multiple users in a specific range, and improves the utilization of air interface resources.

In the existing MCPTT protocol, before the service is initiated, the binding of the group service and the eMBMS multicast bearer is completed according to a predefined bearer method, and the UE completes the acquisition of the multicast bearer during registration. Since the service coverage of eMBMS is based on the MBSFN Area (MASF) of the Broadcast Broadcast Service (MBMS), group communication is based on user groups and does not support clusters. Form of business carried out in a specific business area. For example, the dispatching department on the railway for traffic command, such as marshalling yards, dispatching stations, etc., the cluster user group needs to handle a large number of shunting operations in the business area, its business area is more concentrated, and the clusters within the group are not in the business area Users do not need to participate in the business. However, the current MCPTT service cannot adapt to the use scenarios of this specific service area.

Summary of the Invention

Embodiments of the present invention provide a method and a device for group service processing and group service area configuration, so as to at least solve the problem that the MCPTT service cannot be adapted to a specific service area in the related art.

According to an embodiment of the present invention, a method for processing a group service is provided, which includes: a key task PTT MCPTT server receives a group service request message initiated by an MCPTT client, wherein the group service request message carries the group service request message The service identifier of the group service, the group identifier of the service group, and the cell identifier of the cell in which the MCPTT client resides; the MCPTT server identifies a target service area corresponding to the group identifier and the cell identifier, and activates the The temporary mobile group identifier (TMGI) corresponding to the target service area; the MCPTT server notifies UEs in the service group of the mapping relationship between the group identifier and the TMGI; the MCPTT The server sends a TMGI activation message to a Broadcast-Multicast Service Center (BM-SC), where the TMGI activation message carries the target service area, the TMGI, and the group identifier; The MCPTT server notifies the MCPTT client to receive data on a Multicast Traffic Channel (MTCH) corresponding to the TMGI

Wherein, identifying a target service area corresponding to the group identifier and the cell identifier includes: obtaining group information of the service group represented by the group identifier, wherein the group information includes information related to the service. A service area corresponding to a group, a multicast broadcast single frequency network MBSFN area included in the service area, and a cell list included in the MBSFN area; identifying the target MBSFN in the group information including the cell identity in the group information An area, and the target service area including the target MBSFN area.

Wherein, after acquiring the group information of the service group indicated by the group identifier, the method further includes: a case where the cell list does not identify a target MBSFN area that includes the cell identifier in the cell list Next, the MCPTT server confirms that the MCPTT client is not in the target service area, and the MCPTT server refuses to send the group service to the MCPTT client.

Wherein, obtaining the TMGI corresponding to the target service area includes: identifying, in the group information, the target MBSFN area in which the cell list includes the cell identity and the target service area including the target MBSFN area. In the case, interact with the BM-SC to obtain the TMGI.

Interacting with the BM-SC includes transmitting a TMGI acquisition message to the BM-SC through a policy and charging rule function (PCRF) network element, where the TMGI acquisition message carries The service identifier, the group identifier, and the identifier of the target MBSFN area; and acquiring the TMGI corresponding to the service identifier and the identifier of the target MBSFN area transmitted by the BM-SC.

Wherein, when notifying the MCPTT client to receive data on the MTCH channel corresponding to the TMGI, the method further includes: notifying the MCPTT client to analyze a Multicast Control Channel (MCCH) and receive a multicast channel schedule. Information (MCH, Scheduling, Information, MSI) and Physical Multicast Channel (PMCH), and receive multicast data.

According to an embodiment of the present invention, a method for configuring a group service area is also provided, which includes: a key task one-touch communication MPTTT server configures one or more service areas for a service group, wherein each of the service areas includes one Or multiple multicast broadcast single frequency network MBSFN areas, each of which contains a cell list; the MCPTT server notifies the group management server to record information of the configured service area, where the information of the service area includes Identification of the one or more business areas.

The information that the MCPTT server notifies the group management server to record the configured service area includes: the MCPTT server notifies the group management server to record the configured service in a new field in the group configuration data. The ID of the area.

The information that the MCPTT server notifies the group management server to record the configured service area includes: the MCPTT server notifies the group management server to record the identification of the one or more business areas with a mapping relationship, the one or Identification of multiple MBSFN areas, and the cell list.

According to an embodiment of the present invention, a device for processing a group service is further provided, including: a receiving module configured to receive a group service request message initiated by a key task push-to-talk MPTTT client, wherein, in the group service request message, Carrying the service identifier of the group service, the group identifier of the service group, and the cell identifier of the cell where the MCPTT client resides; an identification module configured to identify a target service corresponding to the group identifier and the cell identifier Area, activating a temporary mobile group identifier TMGI corresponding to the target service area; a first notification module configured to notify UEs in the service group of a mapping relationship between the group identifier and the TMGI; a sending module Is configured to send a TMGI activation message to a broadcast multicast service center BM-SC, wherein the TMGI activation message carries the target service area, the TMGI, and the group identifier; a second notification module is configured to notify The MCPTT client receives data on a multicast transmission channel MTCH corresponding to the TMGI.

The obtaining module includes a first obtaining unit configured to obtain group information of the service group indicated by the group identifier, and the group information includes a service corresponding to the service group. Area, a multicast broadcast single-frequency network MBSFN area included in the service area, and a cell list included in the MBSFN area; a second acquisition unit configured to identify in the group information that the cell list includes the cell identity A target MBSFN area, and the target service area including the target MBSFN area.

According to an embodiment of the present invention, a device for configuring a group service area is further provided, including: a configuration module configured to configure one or more service areas for a service group, wherein each of the service areas includes one or more service areas. Multicast broadcast single frequency network MBSFN areas, each of which contains a cell list; a notification module configured to notify a group management server to record information of a configured service area, wherein the information of the service area includes all The identification of one or more business areas.

The notification module includes a first notification unit configured to notify the group management server to record an identifier of the configured service area in a new field in the group configuration data.

The notification module includes a second notification unit configured to notify the group management server to record the identifier of the one or more service areas, the identifier of the one or more MBSFN areas, and the cell. List.

According to an embodiment of the present invention, a storage medium is also provided, where the computer program is stored in the storage medium, wherein the computer program is configured to execute the method described in the foregoing embodiment when running.

According to an embodiment of the present invention, there is also provided an electronic device including a memory and a processor, wherein the computer program is stored in the memory, and the processor is configured to run the computer program to execute the computer program described in the foregoing embodiments. Methods.

In the above-mentioned embodiment of the present invention, the service limited area is configured on the MCPTT server side, and the MBSFN area is identified according to the location of the service initiator, so that the service initiation and execution of the service are always restricted to a specific MA area, thereby overcoming the inability of MPTTT services With specific use cases.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described here are used to provide a further understanding of the present invention and constitute a part of the present application. The schematic embodiments of the present invention and the descriptions thereof are used to explain the present invention, and do not constitute an improper limitation on the present invention. In the drawings:

FIG. 1 is a schematic diagram of an MBSFN area according to an embodiment of the present invention;

2 is a flowchart of a group service processing method according to an embodiment of the present invention;

3 is a flowchart of a group area configuration method according to an embodiment of the present invention;

4 is a schematic structural diagram of an MPTTT server according to an embodiment of the present invention;

5 is a schematic structural diagram of an MPTTT server according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of an MPTTT + MBMS functional architecture according to an embodiment of the present invention; FIG.

7 is a flowchart of bearer creation and activation of an eMBMS-based area group call service according to an embodiment of the present invention;

8 is a flowchart of interactions of network elements in an initiation stage of an eMBMS-based area group call service according to an embodiment of the present invention;

FIG. 9 is a schematic flowchart of a mobile scenario across service areas according to an embodiment of the present invention.

detailed description

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

It should be noted that the terms “first” and “second” in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

The following describes the terms in the embodiments of the present invention accordingly:

MBMS Service Area: refers to the geographical area of a network that transmits MBMS services, that is, the area that provides eMBMS services. This area includes cells that perform MBSFN services, as well as cells that do not perform MBSFN but cooperate with MBSFN for power control.

MBSFN Synchronization Area: refers to a geographical area within which eNodeBs can achieve synchronization and perform MBSFN transmission. On a given frequency, an eNodeB can only belong to one MBSFN Synchronization Area.

Synchronization refers to the area's ability to transmit the same eMBMS service; this ability guarantees that the air interface of all eNodeBs of the same multicast service in the area are sent simultaneously. When users move in the area and accept a certain multicast service, they guarantee that The service is received "seamlessly" in time.

MBSFN Area (SA): A group of cells that coordinate MBSFN transmission in the MBSFN synchronization area. A cell in the MBSFN synchronization area can belong to multiple MBSFN areas. Each MBSFN area has different services and cell sets. Cells in these areas send the same content to perform MBSFN merge on the UE. Transmissions from multiple cells in the MBSFN area must adhere to strict time synchronization.

MA is a multicast cell, a logical concept. It can be understood that multicast is a super cell, but not all physical resources in the cell are uniformly scheduled, but each cell takes out a part of the resources for unified scheduling.

Figure 1 below illustrates the relationship between these areas. As shown in FIG. 1, one MBSFN synchronization area supports one independent MBSFN area A and two overlapping MBSFN areas B and C.

Group 1 is an independent cell for non-MBSFN and MBMS transmission, and is a single cell for transmitting MBMS services in the MBMS service area. This cell does not belong to the MBSFN synchronization area, so the MBSFN transmission mode cannot be used. Single-cell MBMS transmission can still be used in LTE. Single-cell MBMS transmission does not require the synchronization mechanism required for MBSFN operation, so strict synchronization cannot be achieved. The single-cell MBMS transmission uses a normal DLSCH downlink shared channel, and the choice between MBSFN transmission and single-cell transmission is performed by the multi-region / multicast coordination entity (MCE) when the MBMS service transmission is established.

Groups 2-5 belong to the same MBSFN synchronization area, and MBSFN transmission can be performed in their respective MBSFN areas. Groups 2, 3, and 5 can perform MBSFN transmissions in their respective MBSFN areas A, B, and C. Group 4 belongs to the overlapping cell configuration of MBSFN area B and area C.

This embodiment provides a method for processing a group service. FIG. 2 is a flowchart of a method for processing a group service according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:

In step S202, the MCPTT server receives a group service request message initiated by the MCPTT client, wherein the group service request message carries a service identifier of the group service, a group identifier of a service group, and the MCPTT client resides in the group service request message. Cell identity of the cell;

Step S204, the MCPTT server identifies a target service area corresponding to the group identity and the cell identity, and activates a TMGI corresponding to the target service area;

Step S206, the MCPTT server notifies UEs in the service group of the mapping relationship between the group identifier and the TMGI;

Step S208, the MCPTT server sends a TMGI activation message to the BM-SC, where the TMGI activation message carries the target service area, the TMGI, and the group identifier;

Step S210: The MCPTT server notifies the MCPTT client to receive data on an MTCH channel corresponding to the TMGI.

In the above embodiment, the MBSFN area of the group service is determined according to the location of the service initiator, so that service initiation and progress are always restricted to a specific MA area, thereby solving the problem that the MCPTT service in the prior art cannot adapt to a specific use scenario.

This embodiment also provides a method for configuring a group service area. FIG. 3 is a flowchart of a method for configuring a group service area according to an embodiment of the present invention. As shown in FIG. 3, the process includes the following steps:

Step S302: The MCPTT server configures one or more service areas for a service group, where each of the service areas includes one or more MBSFN areas, and each of the MBSFN areas includes a cell list;

In step S304, the MCPTT server notifies the group management server to record the configured service area information, wherein the information of the service area includes the identifiers of the one or more service areas.

In the above embodiment, the limited area of the group service is configured on the MCPTT server side, so that the MBSFN area of the group service can be determined according to the location of the service initiator, so that the service initiation and progress are always limited to a specific MA area, thereby solving the current problem. There is a problem in the technology that the MCPTT service cannot adapt to a specific use scenario.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary universal hardware platform, and of course, also by hardware, but in many cases the former is Better implementation. Based on such an understanding, the technical solution of the present invention, in essence, or a part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, The CD-ROM) includes several instructions for causing a terminal device (computer, server, or network device, etc.) to execute the methods described in the embodiments of the present invention.

In this embodiment, an MCPTT server is also provided. The MCPTT server is used to implement the foregoing embodiments and preferred implementation manners, and the description will not be repeated. As used below, the term "module" may implement a combination of software and / or hardware for a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and conceived.

FIG. 4 is a structural block diagram of an MCPTT server according to an embodiment of the present invention. In this embodiment, the functions of the modules of the MCPTT server are mainly described from the perspective of the group service. As shown in FIG. 4, the device includes a receiving module 10, an obtaining module 20, a first notification module 30, a sending module 40, and a second notification module 50.

The receiving module 10 is configured to receive a group service request message initiated by an MCPTT client, wherein the group service request message carries a service identifier of the group service, a group identifier of a service group, and a location where the MCPTT client resides. Cell ID of the reserved cell;

The identification module 20 is configured to identify a target service area corresponding to the group identity and the cell identity, and activate a TMGI corresponding to the target service area;

A first notification module 30 configured to notify UEs in the service group of a mapping relationship between the group identifier and the TMGI;

The sending module 40 is configured to send a TMGI activation message to the BM-SC, where the TMGI activation message carries the target service area, the TMGI, and the group identifier;

The second notification module 50 is configured to notify the MCPTT client to receive data on an MTCH channel corresponding to the TMGI.

FIG. 5 is a structural block diagram of an MCPTT server according to another embodiment of the present invention. In this embodiment, the functions of the modules of the MCPTT server are mainly described in detail from the perspective of the configuration of the group service area. As shown in FIG. 5, the MCPTT server includes a configuration module 60 and a notification module 70.

The configuration module 60 is configured to configure one or more service areas for a service group, wherein each of the service areas includes one or more MBSFN areas, and each of the MBSFN areas includes a cell list;

The notification module 70 is configured to notify the group management server to record information of the configured service areas, where the information of the service areas includes identifiers of the one or more service areas.

In this embodiment, the MCPTT server structural module is mainly described from the perspective of the configuration of the group service area. Of course, this embodiment can also be combined with the MCPTT server shown in FIG. 4, that is, the The MCPTT server may also include various functional modules of the MCPTT server shown in FIG. 4, thereby forming an MCPTT server with a group service area configuration and corresponding group service processing.

It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to the above: the above modules are located in the same processor; or the above modules are arbitrarily combined The forms are located in different processors.

FIG. 6 is a schematic diagram of an MPTTT + MBMS functional architecture according to an embodiment of the present invention. The following embodiments can be implemented based on this functional architecture.

As shown in Figure 6, GCSE Application and GCSE Application Server are application layers that provide cluster users with end-to-end cluster services. The eNB is a radio access network and is an air interface access part of 3GPP. EPC is an evolved packet core network that provides unicast and multicast bearer processing. MME, S-GW, and P-GW are the unicast core network elements. MUSE includes multicast core network elements such as MBMS-GW and BM-SC.

Based on the existing eMBMS protocol and the MCPTT protocol, this embodiment provides a method for restricting services based on the eMBMS MCPTT area. By configuring the group service limited area on the MCPTT server side and the limited relationship with MBSFN AREA, the MBSFN AREA area is identified according to the location of the initiator, so that business initiation and execution are always restricted to specific MBSFN AREA services.

This embodiment is specifically described from the following two parts:

1. Regional configuration.

2. Business initiation process.

For the area configuration part, it mainly includes the following steps:

MCPTT Server configures the cluster business area. Specifically, the business area configuration is added to the MCPTT Server Group Management server. The cluster service area is based on a specific group (Goup). A group can correspond to multiple service areas, and a set of multiple MA areas can be configured. The business area here is a logical concept. When corresponding to a physical area, the relationship mapping between each business area and its corresponding MBSFN AREA must be completed. All physical cell identities included in the MBSFN AREA are also referenced.

The business initiation process mainly includes the following steps:

1. MCPTT Client1 initiates an MCPTT group service, which carries the Group ID and the location information of the resident cell. After the message arrives at the MCPTT Server, the correspondence between the origination position of MCPTT Client1 and the cluster service area is determined. That is, according to the mapping relationship between the group ID, the MBSFN area, and the cell list included in the MBSFN AREA, the restricted area where the service is initiated is matched.

2. MCPTT Server adopts dynamic establishment method for the establishment of multicast bearer.

Specifically, step 2 is further divided into the following specific detailed steps:

1) The MCPTT server sends a TMGI acquisition message corresponding to the service area subscription service to the BM-SC, carrying the corresponding group service identifier, service area identifier (that is, multiple MA sets), and Group ID. The BM-SC returns the Service ID configured in the service area to form a TMGI and responds to the MCPTT Server.

2) The MCPTT server uses the GC1 port to notify the mapping relationship between the Group ID of all users in the group and the TMGI corresponding to the service through SIP messages.

3) After receiving the message, the user UE in the group saves the mapping relationship between the Group ID and the TMGI corresponding to the service.

3. The MCPTT server initiates the TMGI activation process, and the message is sent to the BM-SC, which at least carries the service area, TMGI, and Group ID. After receiving the message, the BM-SC completes the scheduling of the radio resources in the multicast sub-frame through the MCE network element, and at the same time responds the TMGI activation result to the GCS AS. At this time, the MCE organization sends an MBSFNAreaConfiguration message over the air interface, and the message contains the MBSFN area information, TMGI and session information for resource scheduling. After the eNodeB resolves the PMCH, it joins the IP multicast address allocated by the MBMS-GW and prepares to receive the media stream.

4. MCPTT Client analyzes MCCH channel, receives MSI and PMCH, receives MTCH channel corresponding to TMGI, and receives multicast data.

Example 1: MCPTT Server Configuration

This embodiment describes in detail the implementation process of MCPTT Server configuring a certain service area. This configuration process will reference the configuration of the MBSFN AREA by the wireless MCE and the cell list information of all base stations corresponding to the MBSFN AREA. The configuration of the service area corresponds to a specific cluster group user of the MCPTT, for example, to a user group of a group call service. Correspondingly, this user group can set multiple business areas. The selection of the business area depends on the matching result between the user location of the initiator and the pre-configured business area.

The specific configuration steps are as follows:

1.MCPTT Server plans the area of a specific user group, and completes the MCE area configuration for each MBSFN AREA.

2. Add the service area identifier for a specific user group to the Group Management Server of the MPTPT Server. The corresponding service area can be one or more, and each service area corresponds to MBSFN AREA and MBSFN AREA. Included cell list.

3. In this embodiment, a new field needs to be added to the corresponding group management server in the protocol (that is, a new field is added to the group configuration data Group configuration data). For details, see the italicized part in Table 1 below.

Table I

Example two

In this embodiment, the MPTPT Server business area analysis process is described in detail. The specific steps are as follows:

1. A group user initiates a group service, carrying the service identification, MCPTT group ID, and the ID of the cell in which the user resides.

2. After receiving the service initiation message, the MCPTT server authenticates the user, interacts with the group management server, obtains group information, a list of group members, and a group service area. According to the agreement, MPTTT Server accesses the group management server through the CSC-3 interface to obtain group information, including all business areas corresponding to the group, the list of MAs contained in the business area, and the list of cells contained in the MA;

3.MCPTT Server determines the MA to which the user belongs according to the cell where the user resides, and then queries the service area to which the user belongs according to the MA. When the user-initiated cell does not belong to any MBSFN AREA in the service area of the group, the user is deemed to be out of the service area, and the MCPTT Server rejects the user's initiation request; otherwise, the MCPTT Server is based on the service area where the group service is located and BM-SC Interact, obtain TMGI, and complete the activation process of the multicast bearer.

According to the protocol, one cell in the MBSFN synchronization area can belong to multiple MBSFN areas. When a user initiates a group service in a public cell, he can specify the MA information of the originating cell. In this way, when a user initiates a group service, a unique service area can be selected based on the group identifier and the ID of the cell in which it resides.

Embodiment three:

In this embodiment, the process of dynamically creating and activating the eMBMS multicast bearer is described in detail. After this mechanism is introduced in this embodiment, the creation of the eMBMS bearer occurs when the service is initiated, and the establishment is triggered by the GCS AS without pre-establishment, thereby improving the utilization of wireless resources to a greater extent. As shown in FIG. 7, the specific steps of this embodiment are as follows:

1. When GCSE AS establishes a multicast bearer for a specific user group, it needs to request TMGI from BM-SC. This request is transmitted to BM-SC through the PCRF network element, and the message carries the MA list, Group ID, and service identification.

2. BM-SC obtains TMGI according to the service identity and MA identity, and responds to GCS AS.

3. GCS AS stores the mapping relationship between Group ID, TMGI, and business area.

4. The GCS AS uses the SIP message to notify the users in the group of the mapping relationship of TMGI, Group ID, and service identifier through the GC1 port. For example, the users in the group can be notified by using the SIP MESSAGE message.

5. After the user UE in the group receives the mapping relationship between TMGI and Group ID and saves it, users outside the group in the area cannot receive the mapping relationship.

6. The GCS AS initiates the process of activating the TMGI in the MBSFN AREA area, carrying the corresponding TMGI, Group ID, business area, that is, the MA list.

7. BM-SC interacts with multicast network elements in the area, completes multicast resource scheduling on the air interface, and returns the activation results of the bearer, the activated multicast bearer ID Flow ID, service description and other information to GCS AS, GCS AS Maintain the mapping relationship between bearers and group services.

Embodiment 4

This embodiment describes the overall process of the group service in detail. In the embodiment, when the user initiates a group-defined group service, the GCS AS completes the process of determining the service area, the bearer activation, and the service establishment. It should be emphasized that, for the convenience of demonstration in this embodiment, the coverage of each GCS service area is simplified into independent areas.

The specific implementation process of this embodiment is as follows:

Preconditions:

1.MCPTT Client1, MCPTT Client2, and MCPTT Client3 and MCPTT Client4 are configured as the same group MCPTT Group1 in the MCPTT Server. Here, the number of users in the group is 4 as an example. In practice, there are at least 2 group users.

2. MCPTT Group1 configures the corresponding service-restricted areas. Assuming MBSFNAREA1 and MBSFNARE2 are configured here, there is no limit to the number of user group service areas configured in actual applications.

3. MBSFN AREA1 contains cells 1 and 2, MBSFN AREA2 contains cells 3 and 4.

4. MCPTT Client1 and MCPTT Client2 are located in cells 1 and 2, MCTPT Client3 and MCPTT Client4 are located in cells 3 and 4.

The business initiation process is shown in Figure 8:

1. The group user MCPTT Client1 initiates the group service, and carries the MCPTT Group ID and the ID of the cell where the MCPTT Client1 resides, that is, cell 1.

2. After the MCPTT server receives the service initiation message, the MCPTT server accesses the group management server through the CSC-3 interface to obtain group information, including all the business areas corresponding to the group, the list of MAs included in the business area, and the list of cells included in the MA.

3. MCPTT Server analyzes the limited area of the current service. Since the location information of the user reported by MCPTT Client1 is contained in MBSFNAREA1, the service is initiated only in MBSFNAREA1.

4. The MCPTT server obtains the TMGI corresponding to the MBSFN AREA1 subscribed service channel from the BM-SC, and carries the corresponding MBSFN AREA1.

5. The BM-SC returns the Service ID configured in the service area according to the configuration information to form a TMGI and respond to the MCPTT Server.

6.MCPTT Server stores the mapping relationship of TMGI, Group ID, and business area MBSFN AREA1.

7. The MCPTT server uses the GC1 port to notify the mapping relationship between the Group ID of all users in the group and the TMGI corresponding to the service using SIP messages.

8. After the MCPTT Client receives the message, it saves the mapping relationship between the Group ID and the TMGI corresponding to the service.

9. The MCPTT server initiates the activation process of the TMGI corresponding to MBSFN AREA1, and the message is sent to BM-SC, which carries MBSFN AREA1, TMGI and Group ID.

10. After receiving the message, the BM-SC completes the multicast bearer activation for the MBMB AREA1 where TMGI is located, configures downstream MBMS-GW node information and session related parameters through the background, and sends a Session Start Request to the downstream MBMS-GW.

11. After the MBMS-GW receives the Session Start Request, it creates an MBMS bearer context, saves the session attributes and a list of control nodes in the MBMS bearer context, and assigns a network transmission IP multicast address and TEID for the session. Send a Session Start, Response message to BM-SC. The MBMS-GW sends a Session Start Request message to the MME in the control node list.

12. After receiving the Session Start Request, the MME creates an MBMS bearer context and saves the Session attributes; sends a Session Start Request message to the MCE.

13. The MCE creates an MBMS bearer context according to the QOS parameters and radio resource conditions in the message, saves the Session attribute, and sends a Session Start Request message to the eNB it manages;

14. If the eNB accepts the Session Start Request message, the eNB creates an MBMS bearer context; joins the IP multicast group through the IGMP protocol, and returns a Session Start Start Response message to the MCE;

15. The MCE returns a Session Start, Response message to the MME.

16. The MME returns a Session Start, Response message to the MBMS-GW.

17. MBMS-GW responds to the BM-SC with a Session Start, Response message.

18. The BM-SC responds to the MCPTT Server with the result of the bearer activation, carrying the bearer information such as TMGI, FlowID, expiration time, service description, BM SC-IP address and port.

19. The MCE sends an MBMS Scheduling Information message to the eNB, and schedules radio resources for the MBSFN AREA based on the configured multicast subframes. This message contains the PMCH information contained in each MBSFN area, the session information contained in each PMCH, the MBSFN subframe configuration, the common subframe allocation period, and the MBSFN area ID. After receiving the MBMS Scheduling Information message, the eNB sends an MBMS Scheduling Information message to the MCE to establish a multicast resource for the MBMS transmission at the same time. That is, the MCCH change notification is sent to the air interface based on the configured multicast subframe for MBSFN.AREA1. In the content of the scheduling message, the organization sends an MBSFNAreaConfiguration message to the air interface. The message includes PMCH information of the MBSFN area, session information contained in each PMCH, MBSFN subframe configuration, common subframe allocation period, and MBSFN area ID.

20. The eNodeB joins the IP multicast address and TEID allocated by the configured MBMS-GW to prepare to receive the media stream.

21. The MCPTT server initiates a call request sent by the users in the group, carrying the MCPTT group ID and media parameters.

22. After the MCPTT Client completes the negotiation of the media data, it starts receiving media streams using multicast. NOTE: Since MCPTT Client2 is in MBSFN AREA1, it will receive the call setup message, and MCPTT Client2 joins the session. MCPTT Client3 and MCPTT Client4 will not receive call setup messages and will not join the service.

Embodiment 5:

In this embodiment, the process of moving users across service areas is described in detail. Specifically, when a user who has signed up to the same Group ID conducts services in different service areas, the user moves from one area to another service area.

Preconditions:

1. The prerequisite for the implementation of this embodiment is that the service is performed during the foregoing embodiment 3.

2. When MCPTT Client3 initiates the same service as MCPTT Client1 in cell 3, similarly, the service will only be established on MBSFN AREA2. At this time, the group service is limited by region. There are two current service instances, and the two instances are independent of each other.

The business process of this embodiment is shown in Figure 9:

1. The MBSFN AREA1 group service is in progress. Any user in the group (including UE1 and UE2), it is assumed here that MPTTT Client 2 (UE2) will not receive services after leaving the cell corresponding to MBSFN AREA1 while the service is in progress. Service continuity will not be guaranteed, and the switch from multicast to unicast is initiated. After the service on MCPTT Client 2 is interrupted, the correspondence between Group and TMGI is deleted on UE2.

2. For users in any group in MBSFN AREA1, MCPTT Client 2 moves to MBSFN AREA2, and it will receive the mapping relationship between TMGI and Group ID sent by GCS AS. When receiving the establishment notification message of business instance 2, MCPTT Client 2 can access Into business.

An embodiment of the present invention further provides a storage medium. The storage medium stores a computer program, and the computer program is configured to execute the steps in any one of the foregoing method embodiments when running.

The above storage medium may include, but is not limited to, various kinds of devices such as a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk, or an optical disk. A medium on which computer programs can be stored.

An embodiment of the present invention further provides an electronic device including a memory and a processor. The memory stores a computer program, and the processor is configured to run the computer program to perform the steps in any one of the foregoing method embodiments.

Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by a general-purpose computing device, and they can be concentrated on a single computing device or distributed on a network composed of multiple computing devices Above, optionally, they may be implemented with program code executable by a computing device, so that they may be stored in a storage device and executed by the computing device, and in some cases, may be in a different order than here The steps shown or described are performed either by making them into individual integrated circuit modules or by making multiple modules or steps into a single integrated circuit module. As such, the invention is not limited to any particular combination of hardware and software.

The above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, or improvement made within the principle of the present invention shall be included in the protection scope of the present invention.

Claims

A method for processing group services includes:

The key task PTT MCPTT server receives a group service request message initiated by the MCPTT client, wherein the group service request message carries the service identifier of the group service, the group identifier of the service group, and the MPTTT client. Cell ID of the camping cell;

The MCPTT server identifies a target service area corresponding to the group identity and the cell identity, and activates a temporary mobile group identity TMGI corresponding to the target service area;

The MCPTT server notifies UEs in the service group of the mapping relationship between the group identifier and the TMGI;

The MCPTT server sends a TMGI activation message to a broadcast multicast service center BM-SC, wherein the TMGI activation message carries the target service area, the TMGI, and the group identifier;

The MCPTT server notifies the MCPTT client to receive data on a multicast transmission channel MTCH corresponding to the TMGI.
The method according to claim 1, wherein identifying a target service area corresponding to the group identity and the cell identity comprises:

Acquiring group information of the service group indicated by the group identifier, wherein the group information includes a service area corresponding to the service group and a multicast broadcast single frequency network MBSFN included in the service area Area and a list of cells included in the MBSFN area;

Identifying in the group information a target MBSFN area in which the cell list includes the cell identity, and the target service area including the target MBSFN area.
The method according to claim 2, wherein after acquiring the group information of the business group represented by the group identifier, the method further comprises:

In the case that the target MBSFN area in which the cell list includes the cell identity is not identified in the group information, the MCPTT server confirms that the MCPTT client is not in the target service area, and the MCPTT server refuses to send to the MCPTT The client sends the group of services.
The method according to claim 2, wherein activating a TMGI corresponding to the target service area comprises:

And when the group information identifies the target MBSFN area including the cell identity and the target MBSFN area including the target MBSFN area, interacting with the BM-SC to obtain To the TMGI.
The method according to claim 4, wherein interacting with the BM-SC comprises:

Transmitting a TMGI acquisition message to the BM-SC through a PCRF network element, where the TMGI acquisition message carries the service identifier, the group identifier, and the identifier of the target MBSFN area;

Acquiring the TMGI corresponding to the service identifier and the target MBSFN area identifier transmitted by the BM-SC.
The method according to claim 1, wherein when notifying the MCPTT client to receive data on an MTCH channel corresponding to the TMGI, further comprising:

Notifying the MCPTT client to parse the multicast control channel MCCH, receive the multicast channel scheduling information MSI and the physical multicast channel PMCH, and receive the multicast data.
A method for configuring a group service area includes:

Key tasks One-to-one MPTTT server configures one or more service areas for a business group, where each said service area contains one or more multicast broadcast single frequency network MBSFN areas, and each said MBSFN area contains a cell List

The MCPTT server notifies the group management server to record information of the configured service area, wherein the information of the service area includes the identifiers of the one or more service areas.
The method according to claim 7, wherein the MCPTT server notifies the group management server to record information of the configured service area comprises:

The MCPTT server notifies the group management server to record the identifier of the configured service area in a new field in the group configuration data.
The method according to claim 7, wherein the MCPTT server notifies the group management server to record information of the configured service area comprises:

The MCPTT server notifies the group management server to record the identifier of the one or more service areas, the identifier of the one or more MBSFN areas, and the cell list.
A processing device for group services includes:

The receiving module is configured to receive a group service request message initiated by a key-click push-to-talk MCPTT client, wherein the group service request message carries a service identifier of the group service, a group identifier of a service group, and the MCPTT The cell identifier of the cell where the client resides;

An identification module configured to identify a target service area corresponding to the group identity and the cell identity, and activate a temporary mobile group identity TMGI corresponding to the target service area;

A first notification module configured to notify a UE in the service group of a mapping relationship between the group identifier and the TMGI;

A sending module configured to send a TMGI activation message to a broadcast multicast service center BM-SC, wherein the TMGI activation message carries the target service area, the TMGI, and the group identifier;

The second notification module is configured to notify the MCPTT client to receive data on a multicast transmission channel MTCH corresponding to the TMGI.
The processing device according to claim 10, wherein the identification module comprises:

A first obtaining unit is configured to obtain group information of the service group indicated by the group identifier, where the group information includes a service area corresponding to the service group, and a service area included in the service area. A multicast broadcast single frequency network MBSFN area and a list of cells included in the MBSFN area;

The second obtaining unit is configured to identify, in the group information, a target MBSFN area in which a cell list includes the cell identity, and the target service area including the target MBSFN area.
A device for configuring a group service area includes:

A configuration module configured to configure one or more service areas for a service group, wherein each of the service areas includes one or more multicast broadcast single frequency network MBSFN areas, and each of the MBSFN areas includes a cell list;

The notification module is configured to notify the group management server to record information of the configured service area, where the information of the service area includes an identifier of the one or more service areas.
The configuration device according to claim 12, wherein the notification module comprises:

The first notification unit is configured to notify the group management server to record the identifier of the configured service area in a newly added field in the group configuration data.
The configuration device according to claim 12, wherein the notification module comprises:

The second notification unit is configured to notify the group management server to record the identifier of the one or more service areas, the identifier of the one or more MBSFN areas, and the cell list.
A storage medium, wherein a computer program is stored in the storage medium, and the computer program is configured to execute the method according to any one of claims 1 to 9 when running.
An electronic device includes a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the computer program according to any one of claims 1 to 9. method.