CN111836206B - Multicast processing method, terminal and network node - Google Patents
Multicast processing method, terminal and network node Download PDFInfo
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- CN111836206B CN111836206B CN201910308551.7A CN201910308551A CN111836206B CN 111836206 B CN111836206 B CN 111836206B CN 201910308551 A CN201910308551 A CN 201910308551A CN 111836206 B CN111836206 B CN 111836206B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides a multicast processing method, a terminal and a network node, wherein the method comprises the following steps: sending a multicast service request message, wherein the multicast service request message is used for requesting a network node to send service data of a first service in a multicast mode; wherein, the multicast service request message carries parameter information of a first service; in the embodiment of the invention, the terminal sends the multicast service request message to the network node to request the network node to issue the service data of the first service in a multicast mode, so that the network node can sense that the service data of the first service can be issued in a multicast mode rather than a unicast mode, and the resource utilization rate of data transmission is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a multicast processing method, a terminal, and a network node.
Background
In order to effectively utilize mobile network resources, the third generation partnership project 3GPP has proposed a Multimedia Broadcast Multicast Service (MBMS), which is a technology for transmitting data from a data source to a plurality of target mobile terminals, so as to realize sharing of network (including a core network and an access network) resources and improve utilization of network resources, particularly air interface resources. The MBMS requires a special spectrum resource, and the user has a low appeal for the mobile multimedia service, which limits the development of the service to a great extent. An enhanced multimedia broadcast multicast service (evolved MBMS, short for eMBMS) is provided in the LTE stage, spectrum resources can be shared with conventional unicast services, flexible spectrum resource allocation and use are supported, and the requirement of the eMBMS on the system is effectively reduced.
The system architecture of the eMBMS newly introduces 3 logical network elements: introducing MCE (multicast coordination entity) at the access network side; the core network side introduces MBMS GW (MBMS gateway) and BM-SC (broadcast multicast service center), and newly adds support for 6 interfaces (MI, M2, M3, Sm, SGmb, and SGi-mb).
eMBMS supports two transmission modes: MBMS Single Frequency Network (MBSFN) transmission mode and SC-PTM (Single Cell Point To Multipoint transmission). The MBSFN transmission scheme is to perform synchronous transmission in multiple cells at the same time and the same frequency. The transmission mode can save frequency resources and improve the utilization rate of frequency spectrum. Meanwhile, the diversity effect brought by the multi-cell same-frequency transmission can solve the problems of blind area coverage and the like, enhance the reliability of receiving and improve the coverage rate. SC-PTM transmission, i.e. multicast broadcast data is transmitted in a single cell via the PDSCH. Specifically, whether the MBSFN transmission mode or the SC-PTM transmission mode is adopted is determined by the MCE.
In the prior art, the broadcast multicast service is triggered from the network side, and the BM-SC determines when to start, terminate the multicast data transmission, and in which areas to transmit the multicast data.
The 5G network and subsequent evolution will be user equipment centric networks, and the delivery of multicast traffic may also be based on user preferences rather than a complete network decision as in the prior art. For example, multi-user online gaming (e.g., multiple users playing in the same car or room), a group of terminals for data backup (e.g., the group of terminals may belong to the same or adjacent cells). The multicast service is independent of fixed geographical area and is dependent on the position of user.
If the existing mechanism is adopted, the network does not know that the group of terminal devices are carrying out data transmission, so that the service data can be distributed to each terminal device in a unicast mode, and the problem of wasting wireless resources is caused.
Disclosure of Invention
Embodiments of the present invention provide a multicast processing method, a terminal, and a network node, so as to solve a problem of radio resource waste caused by network triggering of a multicast service in the prior art.
In order to solve the above problem, the present invention provides a multicast processing method, applied to a first terminal, including:
sending a multicast service request message, wherein the multicast service request message is used for requesting a network node to issue service data of a first service in a multicast mode;
wherein, the multicast service request message carries parameter information of the first service.
Wherein the parameter information of the first service includes at least one of:
a Protocol Data Unit (PDU) session identifier;
a quality of service flow identification;
5G service quality identification;
distributing and retaining priority ARP;
multimedia broadcast multicast service session identification;
a temporary mobile group identity, TMGI;
a service flow identifier;
application layer information.
Wherein, the multicast service request message also carries at least one of the following information:
identification information of a cell in which the first terminal is located;
latitude and longitude information of the first terminal;
a moving speed of the first terminal;
a direction of movement of the first terminal;
and the information of the target terminal group where the first terminal is located.
Wherein, the information of the target terminal group where the first terminal is located also carries at least one of the following information:
the group request indication information of the target terminal group where the first terminal is located;
the number of terminals included in a target terminal group where the first terminal is located;
group identification information of a target terminal group where the first terminal is located;
the identification information of the cell in which at least one terminal is located, wherein the cell is contained in a target terminal group in which the first terminal is located;
longitude and latitude information of at least one terminal contained in a target terminal group where the first terminal is located;
the moving speed of at least one terminal contained in a target terminal group where the first terminal is located;
and the moving direction of at least one terminal contained in the target terminal group where the first terminal is located.
Wherein the method further comprises:
receiving a multicast service response message sent by a network node; the multicast service response message carries at least one of the following information:
a Radio Network Temporary Identifier (RNTI) of a target terminal group where the first terminal is located;
a temporary mobile group identity, TMGI, of the first service;
a multimedia broadcast multicast service session identifier;
identifying a service flow;
key information;
a protocol data unit PDU session identifier;
a quality of service flow identification;
5G service quality identification;
a network node estimated session start time;
a session time period estimated by the network node;
identification information of a multicast area of the first service.
Under the condition that the multicast service request message carries the information of the target terminal group where the first terminal is located, the key information is suitable for all terminals contained in the target terminal group where the first terminal is located;
otherwise, the key information is applicable to the first terminal.
Wherein, under the condition that the multicast service request message carries the information of the target terminal group where the first terminal is located, the method further comprises:
and forwarding the multicast service response message to other terminals contained in the target terminal group.
Wherein the method further comprises:
and receiving the service data of the first service issued by the network node in a multicast mode according to the multicast service response message.
The embodiment of the invention also provides a multicast processing method, which is applied to the network node and comprises the following steps:
receiving a multicast service request message sent by a first terminal, wherein the multicast service request message is used for requesting a network node to send service data of a first service in a multicast mode; wherein, the multicast service request message carries parameter information of a first service;
and sending a multicast service response message to the first terminal, and issuing the service data of the first service in a multicast mode.
Wherein the parameter information of the first service includes at least one of the following:
a Protocol Data Unit (PDU) session identifier;
a quality of service flow identification;
5G service quality identification;
distributing and retaining priority ARP;
multimedia broadcast multicast service session identification;
a temporary mobile group identity, TMGI;
a service flow identifier;
application layer information.
Wherein, the multicast service request message also carries at least one of the following information:
identification information of a cell in which the first terminal is located;
latitude and longitude information of the first terminal;
a moving speed of the first terminal;
a direction of movement of the first terminal;
and the information of the target terminal group where the first terminal is located.
Wherein, the information of the target terminal group where the first terminal is located also carries at least one of the following information:
the group request indication information of the target terminal group where the first terminal is located;
the number of terminals included in a target terminal group where the first terminal is located;
group identification information of a target terminal group where the first terminal is located;
the identification information of the cell in which at least one terminal is located, wherein the cell is contained in a target terminal group in which the first terminal is located;
longitude and latitude information of at least one terminal contained in a target terminal group where the first terminal is located;
the moving speed of at least one terminal contained in the target terminal group where the first terminal is located;
and the moving direction of at least one terminal contained in the target terminal group where the first terminal is located.
Wherein the multicast service response message carries at least one of the following information:
a Radio Network Temporary Identifier (RNTI) of a target terminal group where the first terminal is located;
a temporary mobile group identity, TMGI, of the first service;
multimedia broadcast multicast service session identification;
identifying a service flow;
key information;
a protocol data unit PDU session identifier;
a quality of service flow identification;
5G service quality identification;
a network node estimated session start time;
a session time period estimated by the network node;
identification information of a multicast area of the first service.
Under the condition that the multicast service request message carries information of a target terminal group where a first terminal is located, the key information is suitable for all terminals contained in the target terminal group where the first terminal is located;
otherwise, the key information is applicable to the first terminal.
The embodiment of the present invention further provides a multicast processing method, which is applied to a second terminal, where the second terminal belongs to a preset terminal group, and the method includes:
and the second terminal sends feedback information for indicating successful receiving of the multicast data to the network node under the condition that at least one terminal successfully receives the multicast data issued by the network node in a multicast mode in the preset terminal group.
Wherein the method further comprises:
and sending feedback information for indicating that the multicast data is not successfully received or not sending the feedback information to the network under the condition that the multicast data issued by the network node in a multicast mode is not successfully received in the preset terminal group.
Wherein the method further comprises:
and acquiring indication information sent by other terminals in the preset terminal group, wherein the indication information is used for indicating whether the other terminals successfully receive multicast data issued by the network node in a multicast mode.
Wherein the method further comprises:
and if the second terminal successfully receives the multicast data issued by the network node in a multicast mode, the second terminal sends the multicast data successfully received by the second terminal to other terminals which do not successfully receive the multicast data in the preset terminal group.
The embodiment of the invention also provides a multicast processing method, which is applied to the network node and comprises the following steps:
receiving feedback information of a preset terminal group aiming at multicast data;
determining that retransmission of the multicast data is not required in case at least one feedback information indicating successful reception of the multicast data is received.
Wherein, the receiving feedback information of the preset terminal group for the multicast data includes:
receiving feedback information which is sent by the second terminal and used for indicating that the multicast data are successfully received under the condition that at least one terminal successfully receives the multicast data issued by the network node in a multicast mode exists in the preset terminal group; and the second terminal belongs to a preset terminal group.
Wherein, the receiving feedback information of the preset terminal group for the multicast data includes:
receiving feedback information respectively sent by each terminal in the preset terminal group;
the feedback information sent by the terminal which successfully receives the multicast data sent by the network node is the feedback information used for indicating the successful reception of the multicast data; the feedback information sent by the terminal which does not successfully receive the multicast data sent by the network node is the feedback information used for indicating that the multicast data is not successfully received.
Wherein, the receiving feedback information of the preset terminal group for the multicast data includes:
and receiving feedback information which is sent by the terminal successfully receiving the multicast data issued by the network node in the preset terminal group and is used for indicating the successful receiving of the multicast data.
Wherein the method further comprises:
and determining that the multicast data needs to be retransmitted when the network node does not receive feedback information for indicating successful reception of the multicast data or when the network node does not receive the feedback information.
The embodiment of the present invention further provides a terminal, where the terminal is a first terminal, the terminal includes a processor and a transceiver, and the processor is configured to control the transceiver to execute the following processes:
sending a multicast service request message, wherein the multicast service request message is used for requesting a network node to send service data of a first service in a multicast mode;
wherein, the multicast service request message carries parameter information of the first service.
Wherein the parameter information of the first service includes at least one of:
a Protocol Data Unit (PDU) session identifier;
a quality of service flow identification;
5G service quality identification;
distributing and retaining priority ARP;
a multimedia broadcast multicast service session identifier;
a temporary mobile group identity, TMGI;
a service flow identifier;
application layer information.
The embodiment of the present invention further provides a network node, which includes a processor and a transceiver, where the processor is configured to control the transceiver to execute the following processes:
receiving a multicast service request message sent by a first terminal, wherein the multicast service request message is used for requesting a network node to send service data of a first service in a multicast mode; wherein, the multicast service request message carries parameter information of a first service;
and sending a multicast service response message to the first terminal, and issuing the service data of the first service in a multicast mode.
Wherein the parameter information of the first service includes at least one of the following:
a protocol data unit PDU session identifier;
a quality of service flow identification;
5G service quality identification;
distributing and retaining priority ARP;
multimedia broadcast multicast service session identification;
a temporary mobile group identity, TMGI;
identifying a service flow;
application layer information.
The embodiment of the present invention further provides a terminal, where the terminal is a second terminal, and the terminal includes a processor and a transceiver, and the processor is configured to control the transceiver to execute the following processes:
and sending feedback information for indicating successful receiving of the multicast data to the network node under the condition that at least one terminal successfully receives the multicast data issued by the network node in a multicast mode in the preset terminal group.
An embodiment of the present invention further provides a network node, which includes a processor and a transceiver, where the transceiver is configured to execute the following processes:
receiving feedback information of a preset terminal group aiming at multicast data;
the processor is configured to:
determining that retransmission of the multicast data is not required in case at least one feedback information indicating successful reception of the multicast data is received.
Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the multicast processing method described above.
The technical scheme of the invention at least has the following beneficial effects:
according to the multicast processing method, the terminal and the network node, the terminal sends the multicast service request message to the network node to request the network node to issue the service data of the first service in a multicast mode, so that the network node can sense that the service data of the first service can be issued in a multicast mode instead of a unicast mode, and therefore the resource utilization rate of data transmission is improved.
Drawings
Fig. 1 is a schematic diagram illustrating one step of a multicast processing method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a second step of the multicast processing method according to the embodiment of the present invention;
FIG. 3 is an interaction diagram of an example I provided by an embodiment of the invention;
FIG. 4 is a second interaction diagram of the first example provided by the embodiment of the invention;
FIG. 5 is an interaction diagram of example four provided by an embodiment of the invention;
fig. 6 is a third schematic diagram illustrating steps of a multicast processing method according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating a fourth step of the multicast processing method according to the embodiment of the present invention;
FIG. 8 is an interaction diagram of example five provided by an embodiment of the invention;
fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a network node according to an embodiment of the present invention.
Detailed Description
To make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an embodiment of the present invention provides a multicast processing method, applied to a first terminal, including:
It should be noted that the parameter information of the first service may not be the identification information of the first service, and may also be the identification information of the first service. The first terminal may also indicate the first service by parameter information of the first service before the network node does not configure the identifier for the first service.
Preferably, the parameter information of the first service includes at least one of:
protocol data unit PDU Session identification (PDU Session ID);
a quality of service Flow Identifier (QoS Flow Identifier);
a 5G quality of service Identifier (5G QoS Identifier);
allocation and Retention priority arp (allocation and Retention priority);
multimedia broadcast multicast service session identification;
a temporary mobile group identity, TMGI;
identifying a service flow;
application layer information.
As an optional embodiment, the multicast service request message further carries at least one of the following information:
identification information of a cell in which the first terminal is located;
latitude and longitude information of the first terminal;
a moving speed of the first terminal;
a direction of movement of the first terminal;
and the information of the target terminal group where the first terminal is located.
Optionally, the information of the target terminal group where the first terminal is located further carries at least one of the following information:
the group request indication information of the target terminal group where the first terminal is located; the group request indication information is used for indicating that the multicast service request message sent by the first terminal is the request of all terminals of a target terminal group where the first terminal is located;
the number of terminals included in a target terminal group where the first terminal is located;
group identification information of a target terminal group where the first terminal is located;
the identification information of the cell in which at least one terminal is located, wherein the cell is contained in a target terminal group in which the first terminal is located;
longitude and latitude information of at least one terminal contained in a target terminal group where the first terminal is located;
the moving speed of at least one terminal contained in a target terminal group where the first terminal is located;
and the moving direction of at least one terminal contained in the target terminal group where the first terminal is located.
It should be noted that the multicast service request message may be carried by a radio resource control RRC message, or may be carried by a hypertext transfer protocol HTTP request.
Bearing in the above example, in an optional embodiment of the present invention, the method further includes:
receiving a multicast service response message sent by a network node; the multicast service response message carries at least one of the following information:
a Radio Network Temporary Identifier (RNTI) of a target terminal group where the first terminal is located;
a temporary mobile group identity, TMGI, of the first service;
a multimedia broadcast multicast service session identifier;
a service flow identifier;
key information;
a protocol data unit PDU session identifier;
a quality of service flow identification;
5G service quality identification;
a session start time estimated by the network node;
a session time period estimated by the network node;
identification information of a multicast area of the first service.
Preferably, under the condition that the multicast service request message carries information of a target terminal group where the first terminal is located, the key information is applicable to all terminals included in the target terminal group where the first terminal is located; otherwise, the key information is applicable to the first terminal.
It should be noted that the network node may be a content provider (i.e., an application server), a multicast service center (e.g., BM-SC), or a base station, which is not limited herein.
Further, in a case that the multicast service request message carries information of a target terminal group where the first terminal is located, the method further includes:
and forwarding the multicast service response message to other terminals contained in the target terminal group.
Further, the method further comprises:
and receiving the service data of the first service issued by the network node in a multicast mode according to the multicast service response message.
It should be noted that the multicast processing method provided in the embodiment of the present invention at least includes the following two modes:
the first mode is as follows: and only the first terminal sends a multicast service request message, wherein the multicast service request message carries the information of the target terminal group where the first terminal is located.
In the mode, the first terminal forwards the multicast service response message to other terminals of the target terminal group; and all the terminals of the target terminal group receive the multicast service data sent by the network node based on the information in the multicast service response message.
And a second mode: each terminal sends a multicast service request message respectively.
In this mode, each terminal receives a multicast service response message broadcasted by the wireless network, and receives multicast service data sent by the network node based on the multicast service response message.
In summary, in the embodiments of the present invention, the terminal sends the multicast service request message to the network node to request the network node to issue the service data of the first service in a multicast manner, so that the network node can sense that the service data of the first service can be issued in a multicast rather than a unicast manner, thereby improving the resource utilization rate of data transmission.
As shown in fig. 2, an embodiment of the present invention further provides a multicast processing method, applied to a network node, including:
It should be noted that the parameter information of the first service may not be the identification information of the first service, but may also be the identification information of the first service. The first terminal may also indicate the first service by parameter information of the first service before the network node does not configure the identifier for the first service.
Preferably, the parameter information of the first service includes at least one of:
a protocol data unit PDU session identifier;
a quality of service flow identification;
5G service quality identification;
distributing and retaining priority ARP;
multimedia broadcast multicast service session identification;
a temporary mobile group identity, TMGI;
identifying a service flow;
application layer information.
As an optional embodiment, the multicast service request message further carries at least one of the following information:
identification information of a cell in which the first terminal is located;
latitude and longitude information of the first terminal;
a moving speed of the first terminal;
a direction of movement of the first terminal;
and the information of the target terminal group where the first terminal is located.
Optionally, the information of the target terminal group where the first terminal is located further carries at least one of the following information:
the group request indication information of the target terminal group where the first terminal is located; the group request indication information is used for indicating that the multicast service request message sent by the first terminal is the request of all terminals of a target terminal group where the first terminal is located;
the number of terminals included in a target terminal group where the first terminal is located;
group identification information of a target terminal group where the first terminal is located;
the identification information of the cell in which at least one terminal is located, wherein the cell is contained in a target terminal group in which the first terminal is located;
longitude and latitude information of at least one terminal contained in a target terminal group where the first terminal is located;
the moving speed of at least one terminal contained in the target terminal group where the first terminal is located;
and the moving direction of at least one terminal contained in the target terminal group where the first terminal is located.
It should be noted that the multicast service request message may be carried by a radio resource control RRC message, or may be carried by a hypertext transfer protocol HTTP request.
Bearing the above example, in an optional embodiment of the present invention, the multicast service response message carries at least one of the following information:
a Radio Network Temporary Identifier (RNTI) of a target terminal group where the first terminal is located;
a temporary mobile group identity, TMGI, of the first service;
multimedia broadcast multicast service session identification;
identifying a service flow;
key information;
a protocol data unit PDU session identifier;
a quality of service flow identification;
5G service quality identification;
a network node estimated session start time;
a session time period estimated by the network node;
identification information of a multicast area of the first service.
Preferably, under the condition that the multicast service request message carries information of a target terminal group where the first terminal is located, the key information is applicable to all terminals included in the target terminal group where the first terminal is located; otherwise, the key information is applicable to the first terminal.
In summary, in the embodiments of the present invention, the terminal sends the multicast service request message to the network node to request the network node to issue the service data of the first service in a multicast manner, so that the network node can sense that the service data of the first service can be issued in a multicast rather than a unicast manner, thereby improving the resource utilization rate of data transmission.
In order to more clearly describe the multicast processing method provided by the embodiment of the present invention, the following detailed description is made with reference to several examples:
example one
The terminal 1 initiates an MBMS service request to the network, after each network node confirms, the base station broadcasts the information related to the MBMS service, and other terminals initiate an MBMS service activation process after receiving the base station broadcast. Here, the base station includes not only the serving base station of the terminal 1 but also other base stations indicated by BM-SC.
Fig. 3 shows a MBMS service request flow initiated by the terminal 1:
when receiving an MBMS service request initiated by a terminal, a base station sends the MBMS service request to an MCE; the message is further forwarded to an MME (Mobility Management Entity);
when the MME does not have the MBMS bearer service (MBMS bearer service), the MME creates the MBMS bearer context and sends an MBMS service request to the MBMS-GW;
when the MBMS-GW does not have the MBMS bearing service, the MBMS-GW creates the MBMS bearing context and sends an MBMS service request to the BM-SC;
after confirming that the MBMS service data is sent in a multicast mode subsequently with a content provider (content provider), the BM-SC returns an MBMS service response to the MBMS-GW.
As shown in fig. 4, the MBMS service request process initiated by other terminals after receiving the broadcast from the base station is as follows:
the difference from the terminal 1 request flow is that other terminals initiate the MBMS service request message based on the MBMS service related information broadcast by the base station, and the MBMS service request message carries information such as TMGI, PDU session ID, QFI, etc. instead of the MBMS service related information requesting multicast. Besides, after receiving the MBMS service request, the BM-SC directly replies the MBMS service confirmation message after the authentication without negotiating with the content provider.
Example two
All terminals initiate MBMS service request to network, BM-SC makes statistics and determines in which areas to execute multicast.
After receiving MBMS service requests of all UE, BM-SC counts the service requests, determines the terminal distribution condition of the same MBMS service, and indicates MBMS-GW and then indicates to MCE in which areas to broadcast the service data in the MBMS service response by way of cell ID list or MBSFN area ID. The key of the terminal to decrypt the multicast data may be obtained from the content provider or from the BM-SC or from the MME/AMF.
Example three
All terminals initiate service requests to content providers, and the requests need to carry the location information (such as latitude and longitude information or cell ID) of the terminals. The content provider makes statistics and indicates the multicast area, such as a terminal location list or a cell ID list, to the BM-SC.
BM-SC determines the area needed to broadcast the service data, and indicates the area to MBMS-GW, MME and MCE. The MCE determines to start the MBSFN transmission mode or the SC-PTM transmission mode and coordinates the radio resources used for sending the MBMS among the base stations. And the base station distributes the multicast service on the wireless resource indicated by the MCE by using the transmission mode indicated by the MCE. The terminal obtains the key for decrypting the multicast data from the content provider, or from the BM-SC, or from the MME, and then uses the key to decode the multicast data.
Example four
As shown in fig. 5, terminals are grouped via D2D/sidelink or other interfaces between terminals, and an MBMS service request is initiated to the network by the group header. After receiving the MBMS service response fed back by the base station, the information such as the key suitable for the whole group of terminals is sent to other terminals in the group through the D2D/sidelink interface.
Further, the terminals that successfully receive the multicast data and the terminals that do not successfully receive the multicast data may interact with each other through D2D/sidelink or other inter-terminal interfaces.
As shown in fig. 6, an embodiment of the present invention further provides a multicast processing method, which is applied to a second terminal, where the second terminal belongs to a preset terminal group, and the multicast processing method includes:
and 61, when at least one terminal successfully receives the multicast data issued by the network node in the multicast mode in the preset terminal group, the second terminal sends feedback information for indicating successful reception of the multicast data to the network node.
In the embodiment of the present invention, as long as one terminal in the preset terminal group successfully receives the multicast data, feedback information, i.e., ACK, for indicating that the multicast data is successfully received is fed back.
Optionally, in the above embodiment of the present invention, the method further includes:
and sending feedback information for indicating that the multicast data is not successfully received or not sending the feedback information to the network under the condition that the multicast data issued by the network node in a multicast mode is not successfully received in the preset terminal group.
Further, in the above embodiment of the present invention, the method further includes:
and acquiring indication information sent by other terminals in the preset terminal group, wherein the indication information is used for indicating whether the other terminals successfully receive multicast data issued by the network node in a multicast mode.
Further, in the above embodiment of the present invention, the method further includes:
and if the second terminal successfully receives the multicast data issued by the network node in a multicast mode, the second terminal sends the multicast data successfully received by the second terminal to other terminals which do not successfully receive the multicast data in the preset terminal group.
In short, successfully received multicast data can be shared to terminals that have not successfully received the data through an inter-terminal interface.
In summary, in the above embodiments of the present invention, as long as one terminal successfully receives the multicast data, the ACK is fed back, so as to reduce the retransmission times of the multicast data and avoid resource waste.
As shown in fig. 7, an embodiment of the present invention further provides a multicast processing method, which is applied to a network node, and includes:
and 72, determining that the multicast data does not need to be retransmitted in case of receiving at least one feedback information indicating successful reception of the multicast data.
As an alternative embodiment, step 71 comprises:
receiving feedback information which is sent by the second terminal and used for indicating that the multicast data are successfully received under the condition that at least one terminal successfully receives the multicast data issued by the network node in a multicast mode exists in the preset terminal group; and the second terminal belongs to a preset terminal group.
In short, as long as one terminal in the group successfully receives the multicast data, the ACK is fed back; NACK is fed back or nothing is fed back only if none of the terminals successfully receives. If the network receives the ACK, the multicast data is considered to be successfully received; if a NACK is received or nothing is received, the multicast data is considered to need retransmission.
As another alternative, step 71 includes:
receiving feedback information respectively sent by each terminal in the preset terminal group;
the feedback information sent by the terminal which successfully receives the multicast data issued by the network node is feedback information used for indicating that the multicast data is successfully received; the feedback information sent by the terminal which does not successfully receive the multicast data sent by the network node is the feedback information used for indicating that the multicast data is not successfully received.
In short, the terminal that receives the successful ACK feeds back the ACK, and the terminal that does not receive the multicast data feeds back the NACK. The network considers that the multicast data is successfully received even if multiple NACKs are received, as long as it receives one ACK. If no ACK is received by the network or all the received feedbacks are NACK, the multicast data is considered to need to be retransmitted.
As yet another alternative, step 71 comprises:
and receiving feedback information which is sent by the terminal successfully receiving the multicast data issued by the network node in the preset terminal group and is used for indicating the successful reception of the multicast data.
In short, the UE that successfully receives feeds back ACK, and the terminal that unsuccessfully receives multicast data does not feed back anything. The network considers the multicast data to be successfully received as long as it receives an ACK. If no ACK is received by the network, the multicast data is considered to need retransmission.
Preferably, the method further comprises:
and determining that the multicast data needs to be retransmitted when the network node does not receive feedback information for indicating successful reception of the multicast data or when the network node does not receive the feedback information.
In summary, in the above embodiments of the present invention, the network node mainly receives a feedback message for indicating successful reception of the multicast data, that is, can confirm that the multicast data has been successfully received, thereby avoiding a further radio resource waste problem caused by retransmission of the multicast data.
In order to more clearly describe the multicast processing method provided by the embodiment of the present invention, the following detailed description is made with reference to several examples:
example five
The terminal group is a plurality of storage units and is used for data backup. Therefore, as long as one terminal can successfully receive the data of the network multicast broadcast, the data storage operation is completed.
It is assumed that terminal 1 and terminal 2 form a terminal group and that the two terminals are under different serving base station coverage. When the multicast data is successfully received, the terminal needs to feed back ACK; if the multicast data is not successfully received, no feedback is needed. Therefore, there are three cases/scenarios, as shown in fig. 8:
scene 1: when some terminals successfully receive the multicast data and other terminals do not: considering that the multicast data is successfully received;
scene 2: when all terminals successfully receive: that is, the BM-SC receives a plurality of ACKs and considers that the multicast data is successfully received;
scene 3: when all terminals have not successfully received: the BM-SC does not receive any feedback, and considers that the multicast data is not successfully received and needs to be retransmitted.
In summary, the embodiment of the present invention provides that the terminal triggers the network to issue the service data in a multicast manner, so that the network can sense that the service data can be issued in a multicast manner rather than a unicast manner, and thus, the resource utilization rate of data transmission is greatly improved. Furthermore, as long as one terminal successfully receives the multicast data, the network can be indicated that the multicast data is successfully received, and the problem of further wireless resource waste caused by multicast data retransmission is avoided.
As shown in fig. 9, an embodiment of the present invention further provides a terminal, where the terminal is a first terminal, the terminal includes a processor 900 and a transceiver 910, and the processor 900 is configured to control the transceiver 910 to perform the following processes:
sending a multicast service request message, wherein the multicast service request message is used for requesting a network node to send service data of a first service in a multicast mode;
wherein, the multicast service request message carries parameter information of the first service.
Optionally, in the above embodiment of the present invention, the parameter information of the first service includes at least one of:
a protocol data unit PDU session identifier;
a quality of service flow identification;
5G service quality identification;
distributing and retaining priority ARP;
multimedia broadcast multicast service session identification;
a temporary mobile group identity, TMGI;
a service flow identifier;
application layer information.
Optionally, in the foregoing embodiment of the present invention, the multicast service request message further carries at least one of the following information:
identification information of a cell in which the first terminal is located;
latitude and longitude information of the first terminal;
a moving speed of the first terminal;
a direction of movement of the first terminal;
and the information of the target terminal group where the first terminal is located.
Optionally, in the foregoing embodiment of the present invention, the information of the target terminal group where the first terminal is located further carries at least one of the following information:
the group request indication information of the target terminal group where the first terminal is located;
the number of terminals included in a target terminal group where the first terminal is located;
group identification information of a target terminal group where the first terminal is located;
the identification information of the cell in which at least one terminal is located, wherein the cell is contained in a target terminal group in which the first terminal is located;
longitude and latitude information of at least one terminal contained in a target terminal group where the first terminal is located;
the moving speed of at least one terminal contained in a target terminal group where the first terminal is located;
and the moving direction of at least one terminal contained in the target terminal group where the first terminal is located.
Optionally, in the foregoing embodiment of the present invention, the transceiver 910 is further configured to:
receiving a multicast service response message sent by a network node; the multicast service response message carries at least one of the following information:
a Radio Network Temporary Identifier (RNTI) of a target terminal group where the first terminal is located;
a temporary mobile group identity, TMGI, of the first service;
multimedia broadcast multicast service session identification;
identifying a service flow;
key information;
a protocol data unit PDU session identifier;
a quality of service flow identification;
5G service quality identification;
a network node estimated session start time;
a session time period estimated by the network node;
identification information of a multicast area of the first service.
Optionally, in the embodiment of the present invention, in a case that the multicast service request message carries information of a target terminal group where the first terminal is located, the key information is applicable to all terminals included in the target terminal group where the first terminal is located;
otherwise, the key information is applicable to the first terminal.
Optionally, in the foregoing embodiment of the present invention, the transceiver 910 is further configured to:
and under the condition that the multicast service request message carries the information of the target terminal group where the first terminal is located, forwarding the multicast service response message to other terminals contained in the target terminal group.
Optionally, in the foregoing embodiment of the present invention, the transceiver 910 is further configured to:
and receiving the service data of the first service issued by the network node in a multicast mode according to the multicast service response message.
To sum up, in the embodiment of the present invention, the terminal sends the multicast service request message to the network node to request the network node to issue the service data of the first service in a multicast manner, so that the network node can sense that the service data of the first service can be issued in a multicast rather than unicast manner, thereby improving the resource utilization rate of data transmission.
It should be noted that, the terminal provided in the embodiments of the present invention is a terminal capable of executing the multicast processing method, and all embodiments of the multicast processing method are applicable to the terminal and all can achieve the same or similar beneficial effects.
As shown in fig. 10, an embodiment of the present invention further provides a network node, which includes a processor 100 and a transceiver 110, where the processor 100 is configured to control the transceiver 110 to perform the following processes:
receiving a multicast service request message sent by a first terminal, wherein the multicast service request message is used for requesting a network node to send service data of a first service in a multicast mode; wherein, the multicast service request message carries parameter information of a first service;
and sending a multicast service response message to the first terminal, and issuing the service data of the first service in a multicast mode.
Optionally, in the above embodiment of the present invention, the parameter information of the first service includes at least one of the following:
a Protocol Data Unit (PDU) session identifier;
a quality of service flow identification;
5G service quality identification;
distributing and retaining priority ARP;
multimedia broadcast multicast service session identification;
a temporary mobile group identity, TMGI;
a service flow identifier;
application layer information.
Optionally, in the foregoing embodiment of the present invention, the multicast service request message further carries at least one of the following information:
identification information of a cell in which the first terminal is located;
latitude and longitude information of the first terminal;
a moving speed of the first terminal;
a direction of movement of the first terminal;
and the information of the target terminal group where the first terminal is located.
Optionally, in the foregoing embodiment of the present invention, the information of the target terminal group where the first terminal is located further carries at least one of the following information:
the group request indication information of the target terminal group where the first terminal is located;
the number of terminals included in a target terminal group where the first terminal is located;
group identification information of a target terminal group where the first terminal is located;
the identification information of the cell in which at least one terminal is located, wherein the cell is contained in a target terminal group in which the first terminal is located;
longitude and latitude information of at least one terminal contained in a target terminal group where the first terminal is located;
the moving speed of at least one terminal contained in a target terminal group where the first terminal is located;
and the moving direction of at least one terminal contained in the target terminal group where the first terminal is located.
Optionally, in the foregoing embodiment of the present invention, the multicast service response message carries at least one of the following information:
a Radio Network Temporary Identifier (RNTI) of a target terminal group where the first terminal is located;
a temporary mobile group identity, TMGI, for the first service;
multimedia broadcast multicast service session identification;
identifying a service flow;
key information;
a protocol data unit PDU session identifier;
a quality of service flow identification;
5G service quality identification;
a session start time estimated by the network node;
a session time period estimated by the network node;
identification information of a multicast area of the first service.
Optionally, in the foregoing embodiment of the present invention, in a case that the multicast service request message carries information of a target terminal group where the first terminal is located, the key information is applicable to all terminals included in the target terminal group where the first terminal is located;
otherwise, the key information is applicable to the first terminal.
In summary, in the embodiment of the present invention, the terminal sends the multicast service request message to the network node to request the network node to issue the service data of the first service in a multicast manner, so that the network node can sense that the service data of the first service can be issued in a multicast rather than unicast manner, thereby improving the resource utilization rate of data transmission.
It should be noted that, the network node provided in the embodiments of the present invention is a terminal capable of executing the multicast processing method, and all embodiments of the multicast processing method are applicable to the network node and can achieve the same or similar beneficial effects.
As shown in fig. 9, an embodiment of the present invention further provides a terminal, where the terminal is a second terminal, the terminal includes a processor 900 and a transceiver 910, and the processor 900 is configured to control the transceiver 910 to perform the following processes:
and sending feedback information for indicating successful receiving of the multicast data to the network node under the condition that at least one terminal successfully receives the multicast data issued by the network node in a multicast mode in the preset terminal group.
Optionally, in the foregoing embodiment of the present invention, the transceiver 910 is further configured to:
and sending feedback information for indicating that the multicast data is not successfully received or not sending the feedback information to the network under the condition that the multicast data issued by the network node in a multicast mode is not successfully received in the preset terminal group.
Optionally, in the foregoing embodiment of the present invention, the transceiver 910 is further configured to:
and acquiring indication information sent by other terminals in the preset terminal group, wherein the indication information is used for indicating whether the other terminals successfully receive multicast data issued by the network node in a multicast mode.
Optionally, in the foregoing embodiment of the present invention, the transceiver 910 is further configured to:
and if the second terminal successfully receives the multicast data issued by the network node in a multicast mode, the multicast data successfully received by the second terminal is sent to other terminals which do not successfully receive the multicast data in the preset terminal group.
In summary, in the above embodiments of the present invention, as long as one terminal successfully receives the multicast data, the network can be indicated that the multicast data has been successfully received, so as to avoid a problem of further radio resource waste caused by multicast data retransmission.
It should be noted that, the terminal provided in the embodiments of the present invention is a terminal capable of executing the multicast processing method, and all embodiments of the multicast processing method are applicable to the terminal and all can achieve the same or similar beneficial effects.
As shown in fig. 10, an embodiment of the present invention further provides a network node, which includes a processor 100 and a transceiver 110, where the transceiver 110 is configured to perform the following processes:
receiving feedback information of a preset terminal group aiming at multicast data;
the processor 100 is configured to:
determining that retransmission of the multicast data is not required in case at least one feedback information indicating successful reception of the multicast data is received.
Optionally, in the foregoing embodiment of the present invention, the transceiver 110 is further configured to:
receiving feedback information which is sent by the second terminal and used for indicating that the multicast data are successfully received under the condition that at least one terminal successfully receives the multicast data issued by the network node in a multicast mode exists in the preset terminal group; and the second terminal belongs to a preset terminal group.
Optionally, in the foregoing embodiment of the present invention, the transceiver 110 is further configured to:
receiving feedback information respectively sent by each terminal in the preset terminal group;
the feedback information sent by the terminal which successfully receives the multicast data sent by the network node is the feedback information used for indicating the successful reception of the multicast data; the feedback information sent by the terminal which does not successfully receive the multicast data sent by the network node is the feedback information used for indicating that the multicast data is not successfully received.
Optionally, in the foregoing embodiment of the present invention, the transceiver 110 is further configured to:
and receiving feedback information which is sent by the terminal successfully receiving the multicast data issued by the network node in the preset terminal group and is used for indicating the successful reception of the multicast data.
Optionally, in the foregoing embodiment of the present invention, the processor 100 is further configured to:
and determining that the multicast data needs to be retransmitted when the network node does not receive feedback information for indicating successful reception of the multicast data or when the network node does not receive the feedback information.
In summary, in the above embodiments of the present invention, the network node mainly receives a feedback message for indicating successful reception of the multicast data, that is, can confirm that the multicast data has been successfully received, thereby avoiding a further radio resource waste problem caused by retransmission of the multicast data.
It should be noted that the network node provided in the embodiments of the present invention is a network node capable of executing the multicast processing method, and all embodiments of the multicast processing method are applicable to the network node and can achieve the same or similar beneficial effects.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements each process in the foregoing multicast processing method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block or blocks.
These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (17)
1. A multicast processing method applied to a first terminal is characterized by comprising the following steps:
sending a multicast service request message to a network node, wherein the multicast service request message is used for requesting the network node to send service data of a first service in a multicast mode; the network node sends the service data of the first service in a unicast mode currently;
wherein, the multicast service request message carries parameter information of a first service;
the multicast service request message also carries at least one of the following information:
identification information of a cell in which the first terminal is located;
latitude and longitude information of the first terminal;
a moving speed of the first terminal;
a direction of movement of the first terminal;
and the information of the target terminal group where the first terminal is located.
2. The method of claim 1, wherein the parameter information of the first service comprises at least one of:
a protocol data unit PDU session identifier;
a quality of service flow identification;
5G service quality identification;
distributing and retaining priority ARP;
multimedia broadcast multicast service session identification;
a temporary mobile group identity, TMGI;
identifying a service flow;
application layer information.
3. The method of claim 1, wherein the information of the targeted terminal group where the first terminal is located further carries at least one of the following information:
the group request indication information of the target terminal group where the first terminal is located;
the number of terminals included in a target terminal group where the first terminal is located;
group identification information of a target terminal group where the first terminal is located;
the target terminal group where the first terminal is located comprises identification information of a cell where at least one terminal is located;
longitude and latitude information of at least one terminal contained in a target terminal group where the first terminal is located;
the moving speed of at least one terminal contained in the target terminal group where the first terminal is located;
and the moving direction of at least one terminal contained in the target terminal group where the first terminal is located.
4. The method of claim 1, further comprising:
receiving a multicast service response message sent by a network node; the multicast service response message carries at least one of the following information:
a Radio Network Temporary Identifier (RNTI) of a target terminal group where the first terminal is located;
a temporary mobile group identity, TMGI, of the first service;
multimedia broadcast multicast service session identification;
identifying a service flow;
key information;
a Protocol Data Unit (PDU) session identifier;
a quality of service flow identification;
5G service quality identification;
a network node estimated session start time;
a session time period estimated by the network node;
identification information of a multicast area of the first service.
5. The method of claim 4, wherein in a case that the multicast service request message carries information of a destination terminal group where the first terminal is located, the key information is applicable to all terminals included in the destination terminal group where the first terminal is located;
otherwise, the key information is applicable to the first terminal.
6. The method of claim 4, wherein in case that the multicast service request message carries information of a target terminal group to which the first terminal belongs, the method further comprises:
and forwarding the multicast service response message to other terminals contained in the target terminal group.
7. The method of claim 4, further comprising:
and receiving the service data of the first service issued by the network node in a multicast mode according to the multicast service response message.
8. A multicast processing method applied to a network node is characterized by comprising the following steps:
receiving a multicast service request message sent by a first terminal, wherein the multicast service request message is used for requesting a network node to send service data of a first service in a multicast mode; the service data of the first service is sent down in a unicast mode at present;
sending a multicast service response message to the first terminal, and issuing service data of the first service in a multicast mode;
wherein, the multicast service request message carries parameter information of a first service;
the multicast service request message also carries at least one of the following information:
identification information of a cell in which the first terminal is located;
latitude and longitude information of the first terminal;
a moving speed of the first terminal;
a direction of movement of the first terminal;
and the information of the target terminal group where the first terminal is located.
9. The method of claim 8, wherein the parameter information of the first service comprises at least one of:
a Protocol Data Unit (PDU) session identifier;
a quality of service flow identification;
5G service quality identification;
distributing and retaining priority ARP;
multimedia broadcast multicast service session identification;
a temporary mobile group identity, TMGI;
a service flow identifier;
application layer information.
10. The method of claim 8, wherein the information of the target terminal group where the first terminal is located further carries at least one of the following information:
the group request indication information of the target terminal group where the first terminal is located;
the number of terminals included in a target terminal group where the first terminal is located;
group identification information of a target terminal group where the first terminal is located;
the target terminal group where the first terminal is located comprises identification information of a cell where at least one terminal is located;
longitude and latitude information of at least one terminal contained in a target terminal group where the first terminal is located;
the moving speed of at least one terminal contained in a target terminal group where the first terminal is located;
and the moving direction of at least one terminal contained in the target terminal group where the first terminal is located.
11. The method of claim 8, wherein the multicast service response message carries at least one of the following information:
a Radio Network Temporary Identifier (RNTI) of a target terminal group where the first terminal is located;
a temporary mobile group identity, TMGI, of the first service;
multimedia broadcast multicast service session identification;
identifying a service flow;
key information;
a protocol data unit PDU session identifier;
a quality of service flow identification;
5G service quality identification;
a network node estimated session start time;
a session time period estimated by the network node;
identification information of a multicast area of the first service.
12. The method according to claim 11, wherein in a case that the multicast service request message carries information of a destination terminal group to which the first terminal is located, the key information is applicable to all terminals included in the destination terminal group to which the first terminal is located;
otherwise, the key information is applicable to the first terminal.
13. A terminal, the terminal being a first terminal, the terminal comprising a processor and a transceiver, wherein the processor is configured to control the transceiver to perform the following process:
sending a multicast service request message, wherein the multicast service request message is used for requesting a network node to send service data of a first service in a multicast mode; the network node sends the service data of the first service in a unicast mode currently;
wherein, the multicast service request message carries parameter information of a first service;
the multicast service request message also carries at least one of the following information:
identification information of a cell in which the first terminal is located;
latitude and longitude information of the first terminal;
a moving speed of the first terminal;
a direction of movement of the first terminal;
and the information of the target terminal group where the first terminal is located.
14. The terminal of claim 13, wherein the parameter information of the first service includes at least one of:
a protocol data unit PDU session identifier;
a quality of service flow identification;
5G service quality identification;
distributing and retaining priority ARP;
multimedia broadcast multicast service session identification;
a temporary mobile group identity, TMGI;
identifying a service flow;
application layer information.
15. A network node comprising a processor and a transceiver, wherein the processor is configured to control the transceiver to perform the following:
receiving a multicast service request message sent by a first terminal, wherein the multicast service request message is used for requesting a network node to send service data of a first service in a multicast mode; the service data of the first service is sent down in a unicast mode at present;
sending a multicast service response message to the first terminal, and issuing service data of the first service in a multicast mode;
wherein, the multicast service request message carries parameter information of a first service;
the multicast service request message also carries at least one of the following information:
identification information of a cell in which the first terminal is located;
latitude and longitude information of the first terminal;
a moving speed of the first terminal;
a direction of movement of the first terminal;
and the information of the target terminal group where the first terminal is located.
16. The network node of claim 15, wherein the parameter information of the first service comprises at least one of:
a protocol data unit PDU session identifier;
a quality of service flow identification;
5G service quality identification;
distributing and retaining priority ARP;
a multimedia broadcast multicast service session identifier;
a temporary mobile group identity, TMGI;
identifying a service flow;
application layer information.
17. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the steps of the multicast processing method according to any one of claims 1 to 7; or the program, when executed by a processor, implements the steps in the multicast processing method according to any of claims 8 to 12.
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| CN102264040A (en) * | 2011-04-29 | 2011-11-30 | 电信科学技术研究院 | Method and device for reporting multimedia broadcast multicast service (MBMS) state |
| CN103856970A (en) * | 2012-11-29 | 2014-06-11 | 中国电信股份有限公司 | Method and system for counting multicast broadcast service demands |
| CN108076438A (en) * | 2016-11-17 | 2018-05-25 | 普天信息技术有限公司 | The dynamic allocation method and system of bearer service in a kind of multi-user's group communication system |
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