CN114846825A

CN114846825A - Data forwarding method and device, and communication equipment

Info

Publication number: CN114846825A
Application number: CN202080088993.6A
Authority: CN
Inventors: 王淑坤
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2022-08-02
Also published as: WO2021189458A1

Abstract

The embodiment of the application provides a data forwarding method, a data forwarding device and communication equipment, wherein the method comprises the following steps: a first base station receives data of a first MBMS sent by first terminal equipment; and the first base station forwards the data of the first MBMS to a second terminal device, and/or the first base station forwards the data of the first MBMS to a second base station, and the data of the first MBMS is forwarded to a third terminal device by the second base station.

Description

Data forwarding method and device, and communication equipment

Technical Field

The embodiment of the application relates to the technical field of mobile communication, in particular to a data forwarding method and device and communication equipment.

Background

Multimedia Broadcast Multicast Service (MBMS) is a technology for transmitting data from one data source to a plurality of users through a shared network resource, which can provide Multimedia services while efficiently utilizing the network resource to realize broadcasting and multicasting of Multimedia services at a higher rate (e.g., 256 kbps).

In a New Radio (NR) system, many scenarios need to support multicast and broadcast service requirements, such as in car networking, industrial internet, etc. It is necessary to introduce MBMS in NR. For the MBMS service in NR, how to efficiently implement transmission of the MBMS service is a pursued target.

Disclosure of Invention

The embodiment of the application provides a data forwarding method and device and communication equipment.

The data forwarding method provided by the embodiment of the application comprises the following steps:

a first base station receives data of a first MBMS sent by first terminal equipment;

and the first base station forwards the data of the first MBMS to a second terminal device, and/or the first base station forwards the data of the first MBMS to a second base station, and the data of the first MBMS is forwarded to a third terminal device by the second base station.

The data forwarding device provided by the embodiment of the application comprises:

a receiving unit, configured to receive data of a first MBMS service sent by a first terminal device;

and the forwarding unit is used for forwarding the data of the first MBMS to a second terminal device and/or forwarding the data of the first MBMS to a second base station, and the data of the first MBMS is forwarded to a third terminal device by the second base station.

The communication device provided by the embodiment of the application comprises a processor and a memory. The memory is used for storing computer programs, and the processor is used for calling and running the computer programs stored in the memory and executing the data forwarding method.

The chip provided by the embodiment of the application is used for realizing the data forwarding method.

Specifically, the chip includes: and the processor is used for calling and running the computer program from the memory so that the equipment provided with the chip executes the data forwarding method.

The computer-readable storage medium provided in the embodiments of the present application is used for storing a computer program, and the computer program enables a computer to execute the data forwarding method described above.

The computer program product provided by the embodiment of the present application includes computer program instructions, and the computer program instructions enable a computer to execute the data forwarding method.

The computer program provided in the embodiments of the present application, when running on a computer, causes the computer to execute the above-described data forwarding method.

Through the technical scheme, the first terminal equipment is a publisher of the first MBMS, other terminal equipment (such as the second terminal equipment and the third terminal equipment) is a receiver of the first MBMS, and data of the first MBMS are forwarded through the first base station where the first terminal equipment is located, so that the data of the first MBMS are forwarded locally, the transmission efficiency of the MBMS is improved, the end-to-end service delay is reduced, and the load of an access network is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application;

FIG. 2 is a diagram illustrating a first SIB related configuration provided by an embodiment of the present application;

fig. 3 is a schematic diagram of a PTM configuration transmission mechanism provided in an embodiment of the present application;

fig. 4 is a PTM channel and a map thereof provided by an embodiment of the present application;

fig. 5 is a flowchart illustrating a data forwarding method provided in an embodiment of the present application;

fig. 6 is a schematic diagram of locally forwarding data of a first MBMS service according to an embodiment of the present application;

fig. 7 is a network architecture diagram for locally forwarding MBMS service data according to an embodiment of the present application;

fig. 8 is a schematic structural component diagram of a data forwarding apparatus according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a chip of an embodiment of the present application;

fig. 11 is a schematic block diagram of a communication system according to an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD), a system, a 5G communication system, a future communication system, or the like.

Illustratively, a communication system 100 applied in the embodiment of the present application is shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device communicating with a terminal device 120 (or referred to as a communication terminal device, a terminal device). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area. Optionally, the Network device 110 may be an evolved Node B (eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the Network device may be a mobile switching center, a relay station, an Access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a Network-side device in a 5G Network, or a Network device in a future communication system, and the like.

The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. As used herein, "terminal equipment" includes, but is not limited to, connections via wireline, such as Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, direct cable connection; and/or another data connection/network; and/or via a Wireless interface, e.g., to a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter; and/or means of another terminal device arranged to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A terminal device arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal device", a "wireless terminal device" or a "mobile terminal device". Examples of mobile terminal devices include, but are not limited to, satellite or cellular telephones; personal Communications Systems (PCS) terminal equipment that may combine a cellular radiotelephone with data processing, facsimile and data Communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. Terminal Equipment may refer to an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal Equipment, mobile device, User terminal Equipment, wireless communication device, User agent, or User Equipment. The access terminal device may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capability, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved PLMN, etc.

Optionally, terminal-to-Device (D2D) communication may be performed between terminal devices 120.

Alternatively, the 5G communication system or the 5G network may also be referred to as a New Radio (NR) system or an NR network.

Fig. 1 exemplarily shows one network device and two terminal devices, and optionally, the communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage of each network device, which is not limited in this embodiment of the present application.

Optionally, the communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that a device having a communication function in a network/system in the embodiments of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal device 120 having a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above and are not described herein again; the communication device may also include other devices in the communication system 100, such as other network entities, for example, a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions related to the embodiments of the present application are described below.

With the pursuit of speed, latency, high-speed mobility, energy efficiency and the diversity and complexity of the services in future life, the third generation partnership project (3) ^rd Generation Partnership Project, 3GPP) the international organization for standardization began developing 5G. The main application scenarios of 5G are: enhanced Mobile Ultra wide band (eMBB), Low-Latency high-reliability communication (URLLC), and massive Machine-Type communication (mMTC).

On the one hand, the eMBB still targets users to obtain multimedia content, services and data, and its demand is growing very rapidly. On the other hand, because the eMBB may be deployed in different scenarios, such as indoor, urban, rural, etc., and the difference between the capabilities and the requirements is relatively large, it cannot be said that it must be analyzed in detail in conjunction with a specific deployment scenario. Typical applications of URLLC include: industrial automation, electric power automation, remote medical operation (surgery), traffic safety, and the like. Typical characteristics of mtc include: high connection density, small data volume, insensitive time delay service, low cost and long service life of the module, etc.

When NR is deployed early, complete NR coverage is difficult to obtain, so typical network coverage is wide area LTE coverage and islanding coverage mode of NR. Moreover, a large amount of LTE is deployed below 6GHz, and the spectrum below 6GHz available for 5G is rare. NR must therefore be studied for spectrum applications above 6GHz, with limited high band coverage and fast signal fading. Meanwhile, in order to protect the early LTE investment of a mobile operator, a light interworking (TIGHT) working mode between LTE and NR is provided.

In order to enable 5G network deployment and commercial applications as soon as possible, 3GPP first completes the first 5G release, namely EN-DC (LTE-NR Dual Connectivity). In EN-DC, an LTE base station (eNB) serves as a Master Node (MN), and an NR base station (gNB or EN-gNB) serves as a Secondary Node (SN). Later in R15, other DC modes will be supported, namely NE-DC, 5GC-EN-DC, NR DC. For EN-DC, the access network connected core network is EPC, while the other DC mode connected core network is 5 GC.

RRC state

In order to reduce air interface signaling, quickly recover wireless connection, and quickly recover data service, 5G defines a new Radio Resource Control (RRC) state, that is, an RRC INACTIVE (RRC _ INACTIVE) state. This state is distinguished from the RRC IDLE (RRC IDLE) state and the RRC ACTIVE (RRC ACTIVE) state. Wherein,

1) RRC _ IDLE state (IDLE state for short): the mobility is cell selection and reselection based on terminal equipment, paging is initiated by a Core Network (CN), and a paging area is configured by the CN. The base station side has no terminal equipment context and no RRC connection.

2) RRC _ CONNECTED state (CONNECTED state for short): the RRC connection exists, and the base station side and the terminal device side have a terminal device context. The network side knows that the location of the terminal device is at a particular cell level. Mobility is network side controlled mobility. Unicast data may be transmitted between the terminal device and the base station.

3) RRC _ INACTIVE state (INACTIVE state for short): mobility is based on cell selection reselection of terminal equipment, connection between CN-NR exists, context of the terminal equipment exists on a certain base station, paging is triggered by RAN, a paging area based on the RAN is managed by the RAN, and the network side knows that the position of the terminal equipment is based on the paging area level of the RAN.

MBMS

The 3GPP Release 6(Release 6, R6) introduced MBMS, a technology for transmitting data from one data source to a plurality of terminal equipments via a shared network resource, which provides multimedia services while efficiently utilizing the network resource to implement broadcast and multicast of the multimedia services at a higher rate (e.g. 256 kbps).

Since the MBMS spectrum efficiency in 3GPP R6 is low, it is not enough to effectively carry and support the operation of mobile tv type services. Therefore, in LTE, 3GPP explicitly proposes to enhance the support capability for downlink high-speed MBMS services, and determines the design requirements for the physical layer and air interface.

The 3GPP R9 introduces evolved MBMS (eMBMS) into LTE. eMBMS proposes a Single Frequency Network (SFN) concept, that is, a Multimedia Broadcast multicast service Single Frequency Network (MBSFN), where MBSFN employs a uniform Frequency to simultaneously transmit service data in all cells, but needs to ensure synchronization between the cells. The method can greatly improve the distribution of the overall signal-to-noise ratio of the cell, and the frequency spectrum efficiency can be correspondingly and greatly improved. eMBMS implements broadcast and multicast of services based on the IP multicast protocol.

In LTE or LTE-Advanced (LTE-a), MBMS has only a broadcast bearer mode and no multicast bearer mode. In addition, the reception of the MBMS service is applicable to terminal devices in an idle state or a connected state.

The 3GPP R13 introduces a Single Cell Point To multipoint (SC-PTM) concept, and SC-PTM is based on the MBMS network architecture.

MBMS introduces new logical channels including a Single Cell-Multicast Control Channel (SC-MCCH) and a Single Cell-Multicast Transport Channel (SC-MTCH). The SC-MCCH and SC-MTCH are mapped to a Downlink-Shared Channel (DL-SCH), and the DL-SCH is further mapped to a Physical Downlink-Shared Channel (PDSCH), wherein the SC-MCCH and SC-MTCH belong to a logical Channel, the DL-SCH belongs to a transport Channel, and the PDSCH belongs to a Physical Channel. The SC-MCCH and SC-MTCH do not support Hybrid Automatic Repeat reQuest (HARQ) operation.

MBMS introduces a new System Information Block (SIB) type, SIB 20. Specifically, the configuration information of the SC-MCCH is transmitted through SIB20, and one cell has only one SC-MCCH. The configuration information of the SC-MCCH comprises the following steps: the modification period of the SC-MCCH, the repetition period of the SC-MCCH, and the scheduling of the wireless frame and the subframe of the SC-MCCH. Further, 1) the boundary of the modification period of the SC-MCCH satisfies SFN mod m ═ 0, where SFN represents the system frame number of the boundary, and m is the modification period of the SC-MCCH (i.e., SC-MCCH-modification period) configured in SIB 20. 2) And scheduling the radio frame of the SC-MCCH to meet the following requirements: SFN mod MCCH-repetition period ═ MCCH-Offset, where SFN represents the system frame number of a radio frame, MCCH-repetition period represents the repetition period of SC-MCCH, and MCCH-Offset represents the Offset of SC-MCCH. 3) The sub-frame of the SC-MCCH is scheduled and indicated by SC-MCCH-Subframe.

The SC-MCCH is scheduled through a Physical Downlink Control Channel (PDCCH). On one hand, a new Radio Network Temporary Identity (RNTI), that is, a Single Cell RNTI (SC-RNTI) is introduced to identify a PDCCH (e.g., SC-MCCH PDCCH) for scheduling an SC-MCCH, and optionally, the SC-RNTI is fixedly valued as FFFC. On the other hand, a new RNTI, namely a Single Cell Notification RNTI (SC-N-RNTI) is introduced to identify a PDCCH (e.g., Notification PDCCH) for indicating a change Notification of the SC-MCCH, and optionally, the SC-N-RNTI is fixedly valued as FFFB; further, the change notification may be indicated by one bit of 8 bits (bits) of the DCI 1C. In LTE, the configuration information of SC-PTM is based on SC-MCCH configured by SIB20, and then SC-MCCH configures SC-MTCH which is used for transmitting service data.

Specifically, the SC-MCCH transmits only one message (i.e., SCPTMConfiguration) for configuring configuration information of the SC-PTM. The configuration information of SC-PTM includes: temporary Mobile Group Identity (TMGI), session Identity (session id), Group RNTI (G-RNTI), Discontinuous Reception (DRX) configuration information, SC-PTM service information of the neighbor cell, and the like. It should be noted that SC-PTM in R13 does not support Robust Header Compression (ROHC) function.

The downlink discontinuous reception of SC-PTMs is controlled by the following parameters: ondurationTimerSCPTM, drx-InactivetTimeSCPTM, SC-MTCH-SchedulingCycle, and SC-MTCH-SchedulingOffset.

When [ (SFN x 10) + subframe number ] module (SC-MTCH-scheduling cycle) ═ SC-MTCH-scheduling offset is satisfied, starting a timer onDurationTimerSCPTM;

when receiving downlink PDCCH dispatching, starting a timer drx-InactivetyTimerSCPTM;

the downlink SC-PTM service is received only when the timer onDurationTimerSCPTM or drx-inactivityttimerscptm is running.

SC-PTM service continuity adopts the MBMS service continuity concept based on SIB15, namely, SIB15+ MBMSIntestrIndication. The service continuity of the terminal device in the idle state is based on the concept of frequency priority.

In NR, many scenarios need to support multicast and broadcast traffic needs, such as in car networking, industrial internet, etc. It is necessary to introduce MBMS in NR. Aiming at the connection state supporting the MBMS, the terminal equipment can receive the MBMS in the connection state, and the receiving information of the MBMS can be synchronized between the network side and the terminal equipment and between the core networks at any time. The terminal device may be a distributor of the MBMS service or a receiver of the MBMS service. When the connected terminal equipment receives the MBMS, the bearer to the core network is established, and the MBMS data from the core network is received through the bearer. If one terminal device is a publisher of the MBMS service and another terminal device is a receiver of the MBMS service, how to efficiently implement transmission of the MBMS service is very important, and therefore, the following technical solution of the embodiment of the present application is proposed. The technical scheme of the embodiment of the application provides a scheme for local forwarding of MBMS service data, reduces end-to-end service delay and reduces load of an access network. It should be noted that the MBMS in this embodiment may also refer to multicast or broadcast.

In the technical solution of the embodiment of the present application, a new SIB (referred to as a first SIB) is defined, and referring to fig. 2, the first SIB includes configuration information of a first MCCH, where the first MCCH is a control channel of an MBMS service, in other words, the first SIB is used to configure configuration information of a control channel of an NR MBMS, and optionally, the control channel of the NR MBMS may also be referred to as an NR MCCH (i.e., the first MCCH).

Further, the first MCCH is used to carry a first signaling, and in this embodiment of the present application, the name of the first signaling is not limited, for example, the first signaling is signaling a, the first signaling includes configuration information of at least one first MTCH, where the first MTCH is a traffic channel (also referred to as a data channel or a transport channel) of an MBMS service, and the first MTCH is used to transmit MBMS service data (e.g., service data of NR MBMS). In other words, the first MCCH is used to configure configuration information of a traffic channel of the NR MBMS, which may also be called NR MTCH (i.e., the first MTCH) optionally.

Specifically, the first signaling is used to configure a service channel of the NR MBMS, service information corresponding to the service channel, and scheduling information corresponding to the service channel. Further, optionally, the service information corresponding to the service channel, for example, the identification information for identifying the service, such as the TMGI, the session id, and the like. The scheduling information corresponding to the traffic channel, for example, the RNTI used when the MBMS service data corresponding to the traffic channel is scheduled, for example, G-RNTI, DRX configuration information, and the like.

It should be noted that the transmission of the first MCCH and the first MTCH is scheduled based on the PDCCH. Wherein, the RNTI used by the PDCCH for scheduling the first MCCH uses a network-wide unique identifier, which is a fixed value. The RNTI used by the PDCCH for scheduling the first MTCH is configured through the first MCCH.

It should be noted that, in the embodiment of the present application, naming of the first SIB, the first MCCH, and the first MTCH is not limited. For convenience of description, the first SIB may also be abbreviated as SIB, the first MCCH may also be abbreviated as MCCH, and the first MTCH may also be abbreviated as MTCH, and referring to fig. 3, a PDCCH (i.e., MCCH PDCCH) for scheduling MCCH and a notification PDCCH are configured through SIB, wherein a PDSCH (i.e., MCCH PDSCH) for transmitting MCCH is scheduled through DCI carried by MCCH PDCCH. Further, M PDCCHs (i.e., MTCH 1 PDCCH, MTCH 2 PDCCH, …, MTCH M PDCCH) for scheduling MTCH are configured through the MCCH, wherein DCI carried by the MTCH n PDCCH schedules a PDSCH (i.e., MTCH n PDSCH) for transmitting MTCH n, n being an integer of 1 or more and M or less. Referring to fig. 4, MCCH and MTCH are mapped to DL-SCH, which belong to a logical channel, DL-SCH which belongs to a transport channel, and PDSCH which belongs to a physical channel, and further DL-SCH which is mapped to PDSCH.

Fig. 5 is a schematic flowchart of a data forwarding method provided in an embodiment of the present application, and as shown in fig. 5, the data forwarding method includes the following steps:

step 501: the first base station receives data of a first MBMS sent by first terminal equipment.

In this embodiment, the first base station is a base station serving a first terminal device, and the first terminal device is a publisher of a first MBMS service. Specifically, the first terminal device sends data of the first MBMS service to the first base station.

Step 502: and the first base station forwards the data of the first MBMS to a second terminal device, and/or the first base station forwards the data of the first MBMS to a second base station, and the data of the first MBMS is forwarded to a third terminal device by the second base station.

In an optional manner of this application, the first base station receives first indication information sent by a core network, where the first indication information is used to indicate whether data of the first MBMS service is forwarded by a local network or a core network; and under the condition that the first indication information indicates that the data of the first MBMS service is forwarded locally, the first base station forwards the data of the first MBMS service to second terminal equipment, and/or forwards the data of the first MBMS service to the second base station.

In this embodiment, the second terminal device and/or the third terminal device are/is a receiver of the first MBMS service. It should be noted that, in the embodiment of the present application, one second terminal device is taken as an example for description, and the number of the second terminal devices is not limited to this, and may be multiple. It should be noted that, in the embodiment of the present application, one third terminal device is taken as an example for description, and the number of the third terminal devices is not limited to this, and may be multiple.

1) For the second terminal device, the base station serving the second terminal device is the first base station, that is, the cells in which the second terminal device and the first terminal device are located are both the cells covered by the first base station. In an optional manner, the cell in which the second terminal device is located is the same as the cell in which the first terminal device is located, for example, the cell in which the second terminal device is located and the cell in which the first terminal device is located are both the cell 1 under the first base station. In another optional manner, the cell in which the second terminal device is located is different from the cell in which the first terminal device is located, for example, the cell in which the second terminal device is located is a cell 1 under the first base station, and the cell in which the first terminal device is located is a cell 2 under the first base station.

For the second terminal device, after receiving the data of the first MBMS service, the first base station directly forwards the data of the first MBMS service to the second terminal device. Specifically, after receiving the data of the first MBMS service, the first base station processes the data of the first MBMS service to obtain an RLC SDU of the data of the first MBMS service; and the first base station forwards the RLC SDU of the data of the first MBMS service to second terminal equipment.

2) For the third terminal device, the base station serving the third terminal device is the second base station, that is, the cell where the third terminal device is located is the cell covered by the second base station, and the cell where the first terminal device is located is the cell covered by the first base station. For example, the cell in which the third terminal device is located is the cell 3 under the second base station, and the cell in which the first terminal device is located is the cell 2 under the first base station.

For the third terminal device, after receiving the data of the first MBMS service, the first base station forwards the data of the first MBMS service to the second base station, and the second base station forwards the data of the first MBMS service to the third terminal device. Specifically, after receiving the data of the first MBMS service, the first base station processes the data of the first MBMS service to obtain RLC SDUs of the data of the first MBMS service; and the first base station forwards the RLC SDU of the data of the first MBMS service to a second base station, and the RLC SDU of the data of the first MBMS service is processed by the second base station and then forwarded to a third terminal device.

It should be noted that the first base station may forward the data of the first MBMS service issued by the first terminal device to the second terminal device. Or, the first base station may forward the data of the first MBMS service issued by the first terminal device to the second base station, and the data of the first MBMS service is forwarded to the third terminal device by the second base station. Or, the first base station may forward the data of the first MBMS service issued by the first terminal device to the second terminal device and the second base station, and further, the data of the first MBMS service is forwarded to the third terminal device by the second base station.

In an optional manner of the present application, the second base station performs data scheduling on the data of the first MBMS service according to the G-RNTI; or the second base station carries out data scheduling on the data of the first MBMS according to the C-RNTI.

Referring to fig. 6, fig. 6 is a schematic diagram of locally forwarding data of the first MBMS service, I) the UE1 sends the data of the first MBMS service to the base station 1. II) after receiving the data of the first MBMS, the base station 1 processes the data and obtains RLC SDU with the data of the first MBMS after processing by a Radio Link Control (RLC) layer. III) the base station 1 forwards RLC SDUs of the data of the first MBMS service directly to the UE2 and/or to the base station 2 through a GTP tunnel. V) after receiving the RLC SDU of the data of the first MBMS service, the base station 2 processes the RLC SDU, the Media Access Control (MAC) layer, and the Physical (PHY) layer on an air interface, and then sends the RLC SDU to the

UEs

3,4,5, and 6. Here, the base station 2 may select to perform data scheduling for the first MBMS service according to the G-RNTI or to perform data scheduling for the first MBMS service according to the C-RNTI (i.e., UE-specific RNTI).

It should be noted that, in the embodiment of the present application, one second base station is taken as an example for description, and the number of the second base stations is not limited to this. The first base station may determine the second base station that needs to be forwarded by:

and the first base station receives second indication information sent by a core network, wherein the second indication information is used for indicating the identification information of the base station where the terminal equipment needing to receive the first MBMS is located and/or the identification information of the cell. Further, optionally, the second indication information is further used to indicate a service identifier of the first MBMS service.

For example: the second indication information comprises a list of base stations and/or a list of cells. Specifically, the second indication information includes identification information (i.e., a base station list) of one or more second base stations, where the second base station is a base station where a terminal device that needs to receive the first MBMS service is located; and/or the second indication information includes identification information (i.e. a cell list) of one or more cells, where the cell is a cell where a terminal device that needs to receive the first MBMS service is located.

In this embodiment of the application, for each of the one or more second base stations, the first base station establishes a GTP tunnel with the second base station, and forwards the RLC SDU of the data of the first MBMS service to the second base station through the GTP tunnel.

Further, optionally, the first base station sends, to the second base station, identification information of at least one cell associated with the second base station, where the identification information of the at least one cell is used by the second base station to determine a cell set for sending the data of the first MBMS service.

In this embodiment of the present application, in order to implement that the core network accurately issues the second indication information to the first base station, the core network needs to collect information of a base station and/or cell information where a terminal device that needs to receive the first MBMS service is located, and specifically, the following method for reporting by the terminal device and/or the base station may be used to implement this: for any terminal equipment needing to receive the first MBMS, the identification information of the base station where the terminal equipment is located and/or the identification information of the cell are reported to the core network by the terminal equipment; or the identification information of the base station where the terminal device is located and/or the identification information of the cell are reported to the core network by the base station where the terminal device is located.

In this embodiment of the present application, in the process of locally forwarding the data of the first MBMS service, a handover may occur, and a target of the handover may be a third terminal device that receives the data of the first MBMS service or a first terminal device that issues the data of the first MBMS service, which will be described below with reference to different cases.

The first condition is as follows: and the third terminal equipment receiving the data of the first MBMS is switched.

Here, the third terminal device is handed over from the first cell of the second base station to the second cell of the third base station.

For this situation, the first base station needs to update a base station to be forwarded (i.e. add a third base station as the base station to be forwarded, and further release the original second base station), specifically, the first base station receives third indication information sent by a core network, where the third indication information is used to indicate at least one of the following: the newly added identification information of the third base station, the newly added identification information of the second cell, the released identification information of the second base station, the released identification information of the first cell, and the service identification of the first MBMS service.

Here, for the target base station of handover (i.e., the third base station), the following operations need to be performed: and the first base station establishes a GTP tunnel between the first base station and the third base station, and forwards the RLC SDU of the data of the first MBMS service to the third base station through the GTP tunnel, wherein the RLC SDU of the data of the first MBMS service is processed by the third base station and then forwarded to the third terminal equipment.

Here, for the source base station (i.e., the second base station) of the handover, the following operations need to be performed: and the first base station releases the GTP tunnel between the first base station and the second base station.

In an optional manner of this application, in a handover process, at least one of indication information for indicating that the third terminal device is handed over, indication information for indicating a service identity of the third terminal device, and a service identifier of the first MBMS service is sent to the core network by the second base station; or at least one of indication information for indicating that the third terminal device is switched, indication information for indicating a service identity of the third terminal device, and a service identifier of the first MBMS service is sent to the core network by the third base station.

In an optional manner of the present application, after the handover is completed, at least one of the identifier information of the third base station, the identifier information of the second cell, and the service identifier of the first MBMS service is reported to the core network by the third terminal device; or at least one of the identifier information of the third base station, the identifier information of the second cell, and the service identifier of the first MBMS service is reported to the core network by the third base station.

The following describes, with reference to a specific example, that a terminal device receiving a first MBMS service performs handover.

The UE1 is a terminal device issuing a first MBMS service, and the cell in which the UE1 is located is a cell 3 covered by the base station 1; the UE3 is a terminal device that receives a first MBMS service, and the UE3 is handed over from a cell 1 (referred to as a source cell) covered by a base station 2 (referred to as a source base station) to a cell 4 (referred to as a target cell) covered by a base station 3 (referred to as a target base station).

1. The target base station or the source base station indicates at least one of the following of the core network: the UE3 comes to the new target base station, the service identity of the UE3 (i.e., receiving the MBMS service), and the service identity of the first MBMS service.

2. The UE3 informs the core network of at least one of the following after handover is completed: identification information of a currently serving base station (i.e., a target base station), identification information of a currently serving cell (i.e., a target cell), and a service identification of the first MBMS service.

3. The core network informs the base station 1 of at least one of: the identification information of the newly added target base station, the identification information of the newly added target cell, the identification information of the released source base station, the identification information of the released source cell and the service identification of the first MBMS service.

4. The base station 1 sends a multicast service establishment request message to a target base station, wherein the multicast service establishment request message carries a service identifier of a first MBMS service.

5. The target base station replies a multicast service establishment response message to the base station 1, wherein the multicast service establishment response message carries a GTP tunnel identifier established for the first MBMS.

6. The target base station configures the UE3 with configuration information about reception of the first MBMS service, such as G-RNTI for scheduling the first MBMS service, DCI for identifying the first MBMS service, and the like.

7. The base station 1 sends a GTP tunnel release request message to the source base station, wherein the GTP tunnel release request message carries a service identifier of the first MBMS service.

8. The source base station releases the GTP tunnel with base station 1.

Case two: and the first terminal equipment which issues the data of the first MBMS is switched.

Here, the first terminal device is handed over from the third cell of the first base station to the fourth cell of the fourth base station.

For this situation, the fourth base station receives fourth indication information sent by the first base station or the core network, where the fourth indication information is used to indicate identification information of a base station and/or identification information of a cell where a terminal device that needs to receive the first MBMS service is located. Further, optionally, the fourth indication information is further used to indicate a service identifier of the first MBMS service.

It should be noted that the content indicated by the fourth indication information is consistent with the content indicated by the second indication information in the foregoing scheme, specifically, the fourth indication information includes identification information of one or more second base stations, where the second base station is a base station where a terminal device that needs to receive the first MBMS service is located; and/or the fourth indication information includes identification information of one or more cells, where the cell is a cell where a terminal device that needs to receive the first MBMS service is located.

Here, for the target base station of handover (i.e., the fourth base station), the following operations need to be performed: and aiming at each second base station in the one or more second base stations, the fourth base station establishes a GTP tunnel with the second base station, and forwards the RLC SDU of the data of the first MBMS service to the second base station through the GTP tunnel.

The establishing, by the fourth base station, a GTP tunnel with the second base station includes: the fourth base station sends an MBMS service establishment request message to the second base station, wherein the MBMS service establishment request message carries the service identification of the first MBMS service; and the fourth base station receives an MBMS service establishment response message sent by the second base station, and the MBMS service establishment carries identification information of a GTP tunnel. Further, optionally, the MBMS service establishment request message carries fifth indication information, where the fifth indication information is used to indicate that the MBMS service establishment request is caused by the handover of the first terminal device.

Here, for the source base station (i.e., the first base station) of the handover, the following operations need to be performed: a GTP tunnel between the second base station and the first base station is released by the second base station initiating a release request to the first base station; or, the first base station initiates a release request to the second base station to release the GTP tunnel between the second base station and the first base station.

In an optional manner of this application, in a handover process, at least one of indication information used for indicating that the first terminal device is handed over, indication information used for indicating a service identity of the first terminal device, and a service identifier of the first MBMS service is sent to the core network by the first base station; or at least one of indication information for indicating that the first terminal device is switched, indication information for indicating a service identity of the first terminal device, and a service identifier of the first MBMS service is sent to the core network by the fourth base station.

In an optional manner of the present application, after the handover is completed, at least one of the identifier information of the fourth base station, the identifier information of the fourth cell, and the service identifier of the first MBMS service is reported to the core network by the first terminal device; or at least one of the identifier information of the fourth base station, the identifier information of the fourth cell, and the service identifier of the first MBMS service is reported to the core network by the fourth base station.

The following describes, with reference to a specific example, that a terminal device that issues a first MBMS service is handed over.

The UE3 is a terminal device receiving the first MBMS service, and the cell in which the UE3 is located is a cell 1 covered by the base station 2; the UE1 is a terminal device that issues a first MBMS service, and the UE1 is handed over from a cell 3 (referred to as a source cell) covered by a base station 1 (referred to as a source base station) to a cell 4 (referred to as a target cell) covered by the base station 3 (referred to as a target base station).

1. The target base station or the source base station indicates at least one of the following of the core network: the UE1 arrives at the new target base station, the service identity of the UE1 (i.e., the MBMS service is published), the service identity of the first MBMS service.

2. The UE1 informs the core network of at least one of the following after handover is completed: identification information of a currently serving base station (i.e., a target base station), identification information of a currently serving cell (i.e., a target cell), and a service identification of the first MBMS service.

3. The core network or the source base station informs the target base station of at least one of the following: the method comprises a service identification of a first MBMS service, a list of base stations where UE needing to receive the first MBMS service is located, and a list of cells where the UE needing to receive the first MBMS service is located.

4. And the target base station sends a multicast service establishment request message to each base station in the base station list, wherein the multicast service establishment request message carries the service identification of the first MBMS.

Optionally, the multicast service establishment request message carries an indication information, where the indication information is used to indicate that the service establishment request is caused by the UE1 that issues the first MBMS service being handed over to a new target base station.

5. And each base station in the base station list replies a multicast service establishment response message to the target base station, wherein the multicast service establishment response message carries a GTP tunnel identifier established for the first MBMS.

6. Each base station in the base station list requests the source base station to release the GTP tunnel with the source base station according to the service identifier and/or the indication information of the first MBMS service (the indication information is used to indicate that the service establishment request is caused by the UE1 that issues the first MBMS service switching to the new target base station) carried in the multicast service establishment request message. Or, the source base station initiates a GTP tunnel release request to each base station in the base station list, thereby releasing the GTP tunnel between the source base station and each base station.

Fig. 7 is a network architecture diagram for locally forwarding MBMS service data according to an embodiment of the present application, where it should be noted that the MBMS service data is data of a first MBMS service in the foregoing scheme of the present application. Referring to fig. 7, the local forwarding of MBMS service data includes the following procedures:

1.1, UE1 establishes MBMS service and negotiates service related information such as service identification with core network.

Specifically, the UE1 enters a connected state and establishes an MBMS service with the core network, the UE1 allocates a PDU session identifier of the MBMS service, and the core network allocates a service identifier for the MBMS service. Meanwhile, the core network sends the service identifier of the MBMS service to the base station 1 and/or the UE1 where the UE1 is located.

1.2, the core network indicates to the base station 1 whether the data of the MBMS service is forwarded through the local or core network.

2. The UE2,3,4,5,6 initiates an MBMS service reception request to the core network.

Here, the MBMS service reception request message carries a service identifier of the MBMS service to inform the core network of the MBMS service that needs to be received (or is of interest).

Here, UE2,3,4,5,6 refers to UE2, UE3, UE4, UE5, and UE 6.

3. The core network UE2,3,4,5,6 is informed of the identity information of the base station and/or the identity information of the cell in which it is located.

Here, the core network UE2,3,4,5,6 may be informed by the base stations (e.g., base station 1 and base station 2) of the identification information of the base station and/or the identification information of the cell in which the base station is located. Alternatively, the UE (e.g., UE2,3,4,5,6) notifies the core network of the identification information of the base station where UE2,3,4,5,6 is located and/or the identification information of the cell.

For example: the base station 1 and the base station 2 report, to the core network, that the UE exists in the cell and needs to receive (or is interested in) the MBMS service, and notify the core network of the identification information of the base station where the UE2,3,4,5,6 is located and/or the identification information of the cell. Further, the service identifier of the core network MBMS service may also be notified.

4. The core network sends the identification information of the base station where the UE2,3,4,5,6 is located and/or the identification information of the cell to the base station 1.

Optionally, the core network further sends the service identifier of the MBMS service to the base station 1.

Here, the identification information of the base station where the UE2,3,4,5,6 is located may be referred to as a base station list, and the identification information of the cell where the UE2,3,4,5,6 is located may be referred to as a cell list.

5. If the core network indicates that the data of the MBMS service is forwarded locally, the base station 1 establishes a GTP tunnel with each base station in the base station list pushed by the core network, and forwards the RLC SDU of the MBMS service data sent by the UE1 to each base station based on the GTP tunnel.

Specifically, the base station 1 initiates a GTP tunnel establishment request forwarded by the MBMS service to each base station in the base station list, and each base station allocates a GTP tunnel identifier forwarded by the MBMS service and notifies the base station 1. The base station 1 forwards RLC SDUs sent by the UE1 to each base station based on the GTP tunnel id. Further, optionally, the base station 1 may also send, to each base station, a cell list associated with the base station, where the cell list is used for the base station to determine a cell set that needs to send MBMS service data. The base station may transmit MBMS service data in all cells or in a part of cells (e.g., the base station 1 provides a cell list).

Fig. 8 is a schematic structural component diagram of a data forwarding device provided in an embodiment of the present application, and is applied to a first base station, and as shown in fig. 8, the data forwarding device includes:

a receiving unit 801, configured to receive data of a first MBMS service sent by a first terminal device;

a forwarding unit 802, configured to forward the data of the first MBMS service to a second terminal device, and/or forward the data of the first MBMS service to a second base station, where the data of the first MBMS service is forwarded to a third terminal device by the second base station.

In an optional manner of the present application, the apparatus further includes:

a processing unit 803, configured to process the data of the first MBMS service after receiving the data of the first MBMS service, to obtain an RLC SDU of the data of the first MBMS service.

In an optional manner of this application, the forwarding unit 802 is configured to forward the RLC SDU of the data of the first MBMS service to the second terminal device.

In an optional manner of this application, the forwarding unit 802 is configured to forward the RLC SDU of the data of the first MBMS service to the second base station, and forward the RLC SDU of the data of the first MBMS service to the third terminal device after being processed by the second base station.

In an optional manner of the present application, the second base station performs data scheduling on the data of the first MBMS service according to the G-RNTI; or,

and the second base station performs data scheduling on the data of the first MBMS according to the C-RNTI.

In an optional manner of this application, the receiving unit 801 is further configured to receive first indication information sent by a core network, where the first indication information is used to indicate whether data of the first MBMS service is forwarded by a local network or a core network;

and under the condition that the first indication information indicates that the data of the first MBMS service is forwarded locally, the forwarding unit forwards the data of the first MBMS service to a second terminal device, and/or forwards the data of the first MBMS service to a second base station.

In an optional manner of this application, the receiving unit 801 is further configured to receive second indication information sent by a core network, where the second indication information is used to indicate identification information of a base station and/or identification information of a cell where a terminal device that needs to receive the first MBMS service is located.

In an optional manner of this application, the second indication information is further used to indicate a service identifier of the first MBMS service.

In an optional manner of this application, the second indication information includes identification information of one or more second base stations, where the second base station is a base station where a terminal device that needs to receive the first MBMS service is located; and/or the presence of a gas in the gas,

the second indication information includes identification information of one or more cells, and the cell is a cell where a terminal device that needs to receive the first MBMS service is located.

an establishing unit (not shown in the figure) configured to establish, for each of the one or more second base stations, a GTP tunnel with the second base station;

the forwarding unit 802 is configured to forward the RLC SDU of the data of the first MBMS service to the second base station through the GTP tunnel.

In an optional manner of this application, the forwarding unit 802 is further configured to send, to the second base station, identification information of at least one cell associated with the second base station, where the identification information of the at least one cell is used for the second base station to determine a cell set for sending the data of the first MBMS service.

In an alternative manner of the present application, for any terminal device that needs to receive the first MBMS service,

the identification information of the base station where the terminal equipment is located and/or the identification information of the cell are reported to the core network by the terminal equipment; or,

and the identification information of the base station where the terminal equipment is located and/or the identification information of the cell are reported to the core network by the base station where the terminal equipment is located.

In an alternative aspect of the present application, in case that the third terminal device is handed over from the first cell of the second base station to the second cell of the third base station,

the receiving unit 801 is further configured to receive third indication information sent by a core network, where the third indication information is used to indicate at least one of the following: the newly added identification information of the third base station, the newly added identification information of the second cell, the released identification information of the second base station, the released identification information of the first cell, and the service identification of the first MBMS service.

a building unit, configured to build a GTP tunnel with the third base station;

the forwarding unit 802 is configured to forward the RLC SDU of the data of the first MBMS service to the third base station through the GTP tunnel, and the RLC SDU of the data of the first MBMS service is processed by the third base station and then forwarded to the third terminal device.

a releasing unit (not shown in the figure) for releasing the GTP tunnel with the second base station.

In an optional manner of this application, in a handover process, at least one of indication information for indicating that the third terminal device is handed over, indication information for indicating a service identity of the third terminal device, and a service identifier of the first MBMS service is sent to the core network by the second base station; or,

at least one of indication information for indicating that the third terminal device is switched, indication information for indicating a service identity of the third terminal device, and a service identifier of the first MBMS service is sent to the core network by the third base station.

In an optional manner of the present application, after the handover is completed, at least one of the identifier information of the third base station, the identifier information of the second cell, and the service identifier of the first MBMS service is reported to the core network by the third terminal device; or,

and at least one of the identification information of the third base station, the identification information of the second cell and the service identification of the first MBMS is reported to the core network by the third base station.

In an optional manner of the present application, in case that the first terminal device is handed over from the third cell of the first base station to the fourth cell of the fourth base station,

the sending unit is further configured to send fourth indication information to the fourth base station, where the fourth indication information is used to indicate identification information of a base station and/or identification information of a cell where a terminal device that needs to receive the first MBMS service is located.

In an optional manner of this application, the fourth indication information is further used to indicate a service identifier of the first MBMS service.

In an optional manner of this application, the fourth indication information includes identification information of one or more second base stations, where the second base station is a base station where a terminal device that needs to receive the first MBMS service is located;

the fourth indication information includes identification information of one or more cells, where the cell is a cell where a terminal device that needs to receive the first MBMS service is located.

In an optional manner of the present application, a GTP tunnel between the second base station and the first base station is released by the second base station initiating a release request to the first base station; or,

and the first base station initiates a release request to the second base station for releasing the GTP tunnel between the second base station and the first base station.

In an optional manner of this application, in a handover process, at least one of indication information used for indicating that the first terminal device is handed over, indication information used for indicating a service identity of the first terminal device, and a service identifier of the first MBMS service is sent to the core network by the first base station; or,

at least one of indication information for indicating that the first terminal device is switched, indication information for indicating a service identity of the first terminal device, and a service identifier of the first MBMS service is sent to the core network by the fourth base station.

In an optional manner of the present application, after the handover is completed, at least one of the identifier information of the fourth base station, the identifier information of the fourth cell, and the service identifier of the first MBMS service is reported to the core network by the first terminal device; or,

and at least one of the identification information of the fourth base station, the identification information of the fourth cell and the service identification of the first MBMS is reported to the core network by the fourth base station.

It should be understood by those skilled in the art that the related description of the data forwarding device in the embodiments of the present application may be understood by referring to the related description of the data forwarding method in the embodiments of the present application.

Fig. 9 is a schematic structural diagram of a communication device 900 according to an embodiment of the present application. The communication device may be a terminal device or a network device (e.g., a base station), and the communication device 900 shown in fig. 9 includes a processor 910, and the processor 910 may call and execute a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 9, the communication device 900 may also include a memory 920. From the memory 920, the processor 910 can call and run a computer program to implement the method in the embodiment of the present application.

The memory 920 may be a separate device from the processor 910, or may be integrated in the processor 910.

Optionally, as shown in fig. 9, the communication device 900 may further include a transceiver 930, and the processor 910 may control the transceiver 930 to communicate with other devices, and specifically, may transmit information or data to the other devices or receive information or data transmitted by the other devices.

The transceiver 930 may include a transmitter and a receiver, among others. The transceiver 930 may further include one or more antennas.

Optionally, the communication device 900 may specifically be a network device in this embodiment, and the communication device 900 may implement a corresponding process implemented by the network device in each method in this embodiment, which is not described herein again for brevity.

Optionally, the communication device 900 may specifically be a mobile terminal device/terminal device according to this embodiment, and the communication device 900 may implement a corresponding process implemented by the mobile terminal device/terminal device in each method according to this embodiment, which is not described herein again for brevity.

Fig. 10 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 1000 shown in fig. 10 includes a processor 1010, and the processor 1010 may call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 10, the chip 1000 may further include a memory 1020. From the memory 1020, the processor 1010 may call and execute a computer program to implement the method in the embodiment of the present application.

The memory 1020 may be a separate device from the processor 1010 or may be integrated into the processor 1010.

Optionally, the chip 1000 may further include an input interface 1030. The processor 1010 may control the input interface 1030 to communicate with other devices or chips, and specifically may obtain information or data transmitted by the other devices or chips.

Optionally, the chip 1000 may further include an output interface 1040. The processor 1010 may control the output interface 1040 to communicate with other devices or chips, and may particularly output information or data to the other devices or chips.

Optionally, the chip may be applied to the network device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the chip may be applied to the mobile terminal device/terminal device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the mobile terminal device/terminal device in each method in the embodiment of the present application, and for brevity, no further description is given here.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc.

Fig. 11 is a schematic block diagram of a communication system 1100 provided in an embodiment of the present application. As shown in fig. 11, the communication system 1100 includes a terminal device 1110 and a network device 1120.

The terminal device 1110 may be configured to implement the corresponding function implemented by the terminal device in the foregoing method, and the network device 1120 may be configured to implement the corresponding function implemented by the network device in the foregoing method, which is not described herein again for brevity.

It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memories are exemplary but not limiting illustrations, for example, the memories in the embodiments of the present application may also be Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM, ESDRAM), Synchronous Link DRAM (SLDRAM), Direct Rambus RAM (DR RAM), and the like. That is, the memory in the embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

The embodiment of the application also provides a computer readable storage medium for storing the computer program.

Optionally, the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the computer-readable storage medium may be applied to the mobile terminal device/terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the mobile terminal device/terminal device in the methods in the embodiments of the present application, which is not described herein again for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions enable the computer to execute corresponding processes implemented by the network device in the methods in the embodiment of the present application, which are not described herein again for brevity.

Optionally, the computer program product may be applied to the mobile terminal device/terminal device in the embodiment of the present application, and the computer program instruction causes the computer to execute a corresponding process implemented by the mobile terminal device/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to the network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute a corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the computer program may be applied to the mobile terminal device/terminal device in the embodiment of the present application, and when the computer program runs on a computer, the computer executes a corresponding process implemented by the mobile terminal device/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method of data forwarding, the method comprising:

a first base station receives data of a first Multimedia Broadcast Multicast Service (MBMS) sent by first terminal equipment;

and the first base station forwards the data of the first MBMS to a second terminal device, and/or the first base station forwards the data of the first MBMS to a second base station, and the data of the first MBMS is forwarded to a third terminal device by the second base station.
The method of claim 1, wherein the method further comprises:

and after receiving the data of the first MBMS service, the first base station processes the data of the first MBMS service to obtain RLC SDU of the data of the first MBMS service.
The method of claim 2, wherein the first base station forwarding the data of the first MBMS service to a second terminal device comprises:

and the first base station forwards the RLC SDU of the data of the first MBMS service to second terminal equipment.
The method of claim 2, wherein forwarding, by the first base station, the data of the first MBMS service to a second base station comprises:

and the first base station forwards the RLC SDU of the data of the first MBMS service to a second base station, and the RLC SDU of the data of the first MBMS service is processed by the second base station and then forwarded to a third terminal device.
The method of claim 4, wherein,

the second base station carries out data scheduling on the data of the first MBMS according to the G-RNTI; or,

and the second base station performs data scheduling on the data of the first MBMS according to the C-RNTI.
The method of any of claims 1-5, wherein the method further comprises:

the first base station receives first indication information sent by a core network, wherein the first indication information is used for indicating whether data of the first MBMS service is forwarded by a local network or a core network;

the first base station forwards the data of the first MBMS service to a second terminal device, and/or the first base station forwards the data of the first MBMS service to a second base station, including:

and under the condition that the first indication information indicates that the data of the first MBMS service is forwarded locally, the first base station forwards the data of the first MBMS service to second terminal equipment, and/or the first base station forwards the data of the first MBMS service to the second base station.
The method of any of claims 1-6, wherein the method further comprises:

and the first base station receives second indication information sent by a core network, wherein the second indication information is used for indicating the identification information of the base station where the terminal equipment needing to receive the first MBMS is located and/or the identification information of the cell.
The method of claim 7, wherein the second indication information is further used for indicating a service identity of the first MBMS service.
The method of claim 7 or 8,

the second indication information comprises identification information of one or more second base stations, and the second base stations are base stations where terminal equipment needing to receive the first MBMS are located; and/or the presence of a gas in the gas,

the second indication information includes identification information of one or more cells, and the cell is a cell where a terminal device that needs to receive the first MBMS service is located.
The method of claim 9, wherein the forwarding, by the first base station, the data of the first MBMS service to the second base station comprises:

and aiming at each second base station in the one or more second base stations, the first base station establishes a GTP tunnel with the second base station, and forwards the RLC SDU of the data of the first MBMS service to the second base station through the GTP tunnel.
The method of claim 10, wherein the method further comprises:

and the first base station sends the identification information of at least one cell associated with the second base station to the second base station, wherein the identification information of at least one cell is used for the second base station to determine a cell set for sending the data of the first MBMS service.
The method according to any of claims 7 to 11, wherein for any terminal device that needs to receive the first MBMS service,

the identification information of the base station where the terminal equipment is located and/or the identification information of the cell are reported to the core network by the terminal equipment; or,

and the identification information of the base station where the terminal equipment is located and/or the identification information of the cell are reported to the core network by the base station where the terminal equipment is located.
The method according to any of claims 1 to 12, wherein in case the third terminal device is handed over from a first cell of the second base station to a second cell of a third base station, the method further comprises:

the first base station receives third indication information sent by a core network, wherein the third indication information is used for indicating at least one of the following: the newly added identification information of the third base station, the newly added identification information of the second cell, the released identification information of the second base station, the released identification information of the first cell, and the service identification of the first MBMS service.
The method of claim 13, wherein the method further comprises:

and the first base station establishes a GTP tunnel between the first base station and the third base station, and forwards the RLC SDU of the data of the first MBMS service to the third base station through the GTP tunnel, wherein the RLC SDU of the data of the first MBMS service is processed by the third base station and then forwarded to the third terminal equipment.
The method of claim 13 or 14, wherein the method further comprises:

and the first base station releases the GTP tunnel between the first base station and the second base station.
The method according to any of claims 13 to 15, wherein, during handover,

at least one of indication information for indicating that the third terminal device is switched, indication information for indicating a service identity of the third terminal device, and a service identifier of the first MBMS service is sent to the core network by the second base station; or,

at least one of indication information for indicating that the third terminal device is switched, indication information for indicating a service identity of the third terminal device, and a service identifier of the first MBMS service is sent to the core network by the third base station.
The method of any of claims 13 to 16, wherein, after handover is complete,

at least one of the identifier information of the third base station, the identifier information of the second cell and the service identifier of the first MBMS service is reported to the core network by the third terminal device; or,

and at least one of the identification information of the third base station, the identification information of the second cell and the service identification of the first MBMS is reported to the core network by the third base station.
The method according to any of claims 1 to 12, wherein in case the first terminal device is handed over from a third cell of the first base station to a fourth cell of a fourth base station, the method further comprises:

and the fourth base station receives fourth indication information sent by the first base station or the core network, wherein the fourth indication information is used for indicating the identification information of the base station where the terminal equipment needing to receive the first MBMS is located and/or the identification information of the cell.
The method of claim 18, wherein the fourth indication information is further used for indicating a service identity of the first MBMS service.
The method of claim 18 or 19,

the fourth indication information includes identification information of one or more second base stations, where the second base station is a base station where terminal equipment that needs to receive the first MBMS service is located; and/or the presence of a gas in the gas,

the fourth indication information includes identification information of one or more cells, where the cell is a cell where a terminal device that needs to receive the first MBMS service is located.
The method of claim 20, wherein the method further comprises:

and for each second base station in the one or more second base stations, the fourth base station establishes a GTP tunnel with the second base station, and forwards the RLC SDU of the data of the first MBMS service to the second base station through the GTP tunnel.
The method of claim 21, wherein the fourth base station establishing a GTP tunnel with the second base station comprises:

the fourth base station sends an MBMS service establishment request message to the second base station, wherein the MBMS service establishment request message carries the service identification of the first MBMS service;

and the fourth base station receives an MBMS service establishment response message sent by the second base station, and the MBMS service establishes the identification information carrying the GTP tunnel.
The method of claim 22, wherein the MBMS service setup request message carries fifth indication information, and the fifth indication information is used to indicate that the MBMS service setup request is caused by the handover of the first terminal device.
The method of any one of claims 18 to 23,

a GTP tunnel between the second base station and the first base station is released by the second base station initiating a release request to the first base station; or,

and the first base station initiates a release request to the second base station for releasing the GTP tunnel between the second base station and the first base station.
The method according to any of claims 18 to 24, wherein, during handover,

at least one of indication information for indicating that the first terminal device is switched, indication information for indicating a service identity of the first terminal device, and a service identifier of the first MBMS service is sent to the core network by the first base station; or,

at least one of indication information for indicating that the first terminal device is switched, indication information for indicating a service identity of the first terminal device, and a service identifier of the first MBMS service is sent to the core network by the fourth base station.
The method of any of claims 18 to 25, wherein, after handover is complete,

at least one of the identifier information of the fourth base station, the identifier information of the fourth cell, and the service identifier of the first MBMS service is reported to the core network by the first terminal device; or,

and at least one of the identification information of the fourth base station, the identification information of the fourth cell and the service identification of the first MBMS is reported to the core network by the fourth base station.
A data forwarding apparatus, the apparatus comprising:

a receiving unit, configured to receive data of a first MBMS service sent by a first terminal device;

and the forwarding unit is used for forwarding the data of the first MBMS to a second terminal device and/or forwarding the data of the first MBMS to a second base station, and the data of the first MBMS is forwarded to a third terminal device by the second base station.
The apparatus of claim 27, wherein the apparatus further comprises:

and the processing unit is used for processing the data of the first MBMS after receiving the data of the first MBMS to obtain the RLC SDU of the data of the first MBMS.
The apparatus of claim 28, wherein the forwarding unit is configured to forward RLC SDUs of the data of the first MBMS service to a second terminal device.
The apparatus of claim 28, wherein the forwarding unit is configured to forward RLC SDUs of the data of the first MBMS service to a second base station, and the RLC SDUs of the data of the first MBMS service are processed by the second base station and forwarded to a third terminal device.
The apparatus of claim 30, wherein,

the second base station carries out data scheduling on the data of the first MBMS according to the G-RNTI; or,

and the second base station performs data scheduling on the data of the first MBMS according to the C-RNTI.
The apparatus according to any one of claims 27 to 31, wherein the receiving unit is further configured to receive first indication information sent by a core network, where the first indication information is used to indicate whether data of the first MBMS service is forwarded locally or by the core network;

and under the condition that the first indication information indicates that the data of the first MBMS service is forwarded locally, the forwarding unit forwards the data of the first MBMS service to a second terminal device, and/or forwards the data of the first MBMS service to a second base station.
The apparatus according to any one of claims 27 to 32, wherein the receiving unit is further configured to receive second indication information sent by a core network, where the second indication information is used to indicate identification information of a base station and/or identification information of a cell where a terminal device that needs to receive the first MBMS service is located.
The apparatus of claim 33, wherein the second indication information is further used for indicating a service identity of the first MBMS service.
The apparatus of claim 33 or 34,

the second indication information comprises identification information of one or more second base stations, and the second base stations are base stations where terminal equipment needing to receive the first MBMS are located; and/or the presence of a gas in the gas,

the second indication information includes identification information of one or more cells, and the cell is a cell where a terminal device that needs to receive the first MBMS service is located.
The apparatus of claim 35, wherein the apparatus further comprises:

an establishing unit, configured to establish, for each of the one or more second base stations, a GTP tunnel with the second base station;

and the forwarding unit is configured to forward the RLC SDU of the data of the first MBMS service to the second base station through the GTP tunnel.
The apparatus of claim 36, wherein the forwarding unit is further configured to send identification information of at least one cell associated with the second base station to the second base station, where the identification information of the at least one cell is used for the second base station to determine a cell set for sending the data of the first MBMS service.
The apparatus of any one of claims 33 to 37, wherein for any terminal device that needs to receive the first MBMS service,

the identification information of the base station where the terminal equipment is located and/or the identification information of the cell are reported to the core network by the terminal equipment; or,

and the identification information of the base station where the terminal equipment is located and/or the identification information of the cell are reported to the core network by the base station where the terminal equipment is located.
The apparatus according to any of claims 27 to 38, wherein in case of a handover of the third terminal device from a first cell of the second base station to a second cell of a third base station,

the receiving unit is further configured to receive third indication information sent by a core network, where the third indication information is used to indicate at least one of the following: the newly added identification information of the third base station, the newly added identification information of the second cell, the released identification information of the second base station, the released identification information of the first cell, and the service identification of the first MBMS service.
The apparatus of claim 39, wherein the apparatus further comprises:

a building unit, configured to build a GTP tunnel with the third base station;

and the forwarding unit is configured to forward the RLC SDU of the data of the first MBMS service to the third base station through the GTP tunnel, and forward the RLC SDU of the data of the first MBMS service to the third terminal device after being processed by the third base station.
The apparatus of claim 39 or 40, wherein the apparatus further comprises:

and the releasing unit is used for releasing the GTP tunnel between the second base station and the user equipment.
The apparatus of any one of claims 39-41, wherein during handover,

at least one of indication information for indicating that the third terminal device is switched, indication information for indicating a service identity of the third terminal device, and a service identifier of the first MBMS service is sent to the core network by the second base station; or,

at least one of indication information for indicating that the third terminal device is switched, indication information for indicating a service identity of the third terminal device, and a service identifier of the first MBMS service is sent to the core network by the third base station.
The apparatus of any of claims 39-42, wherein, after handover is complete,

at least one of the identifier information of the third base station, the identifier information of the second cell and the service identifier of the first MBMS service is reported to the core network by the third terminal device; or,

and at least one of the identification information of the third base station, the identification information of the second cell and the service identification of the first MBMS is reported to the core network by the third base station.
The apparatus according to any of claims 27 to 38, wherein in case of a handover of the first terminal device from a third cell of a first base station to a fourth cell of a fourth base station,

the sending unit is further configured to send fourth indication information to the fourth base station, where the fourth indication information is used to indicate identification information of a base station where a terminal device that needs to receive the first MBMS service is located and/or identification information of a cell.
The apparatus of claim 44, wherein the fourth indication information is further used for indicating a service identity of the first MBMS service.
The apparatus of claim 44 or 45,

the fourth indication information includes identification information of one or more second base stations, where the second base station is a base station where terminal equipment that needs to receive the first MBMS service is located;

the fourth indication information includes identification information of one or more cells, where the cell is a cell where a terminal device that needs to receive the first MBMS service is located.
The apparatus of any one of claims 44 to 46,

a GTP tunnel between the second base station and the first base station is released by the second base station initiating a release request to the first base station; or,

and the first base station initiates a release request to the second base station for releasing the GTP tunnel between the second base station and the first base station.
The apparatus of any one of claims 44-47, wherein during handover,

at least one of indication information for indicating that the first terminal device is switched, indication information for indicating a service identity of the first terminal device, and a service identifier of the first MBMS service is sent to the core network by the first base station; or the number of the first and second groups is equal,

at least one of indication information for indicating that the first terminal device is switched, indication information for indicating a service identity of the first terminal device, and a service identifier of the first MBMS service is sent to the core network by the fourth base station.
The apparatus of any of claims 44-48, wherein, upon completion of handover,

at least one of the identifier information of the fourth base station, the identifier information of the fourth cell, and the service identifier of the first MBMS service is reported to the core network by the first terminal device; or,

and at least one of the identification information of the fourth base station, the identification information of the fourth cell and the service identification of the first MBMS is reported to the core network by the fourth base station.
A communication device, comprising: a processor and a memory for storing a computer program, the processor being configured to invoke and execute the computer program stored in the memory to perform the method of any of claims 1 to 26.
A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 1 to 26.
A computer-readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 26.
A computer program product comprising computer program instructions to cause a computer to perform the method of any one of claims 1 to 26.
A computer program for causing a computer to perform the method of any one of claims 1 to 26.