WO2021189458A1 - Data forwarding method and apparatus, and communication device - Google Patents

Abstract

Embodiments of the present application provide a data forwarding method and apparatus, and a communication device. The method comprises: a first base station receives data of a first MBMS service transmitted by a first terminal device; 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, and the data of the first MBMS service is forwarded to a third terminal device by the second base station.

Description

Data forwarding method and device, and communication equipment Technical field

The embodiments of the present application relate to the field of mobile communication technology, and in particular to a data forwarding method and device, and communication equipment.

Background technique

Multimedia Broadcast Multicast Service (MBMS) is a technology that transmits data from one data source to multiple users by sharing network resources. This technology can effectively use network resources while providing multimedia services to achieve better performance. Broadcast and multicast of high-speed (such as 256kbps) multimedia services.

In the New Radio (NR) system, many scenarios need to support the service requirements of multicast and broadcast, such as the Internet of Vehicles, the industrial Internet, and so on. So it is necessary to introduce MBMS in NR. For the MBMS service in NR, how to efficiently realize the transmission of the MBMS service is the goal pursued.

Summary of the invention

The embodiments of the present application provide a data forwarding method and device, and communication equipment.

The data forwarding method provided by the embodiment of the present application includes:

The first base station receives the data of the first MBMS service sent by the first terminal device;

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

The data forwarding device provided by the embodiment of the present application includes:

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

The forwarding unit is configured to forward the data of the first MBMS service to the second terminal device, and/or forward the data of the first MBMS service to the second base station, and the data of the first MBMS service is transferred to the second base station. The second base station forwards it to the third terminal device.

The communication device provided by the embodiment of the present application includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the above-mentioned data forwarding method.

The chip provided in the embodiment of the present application is used to implement the above-mentioned data forwarding method.

Specifically, the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the above-mentioned data forwarding method.

The computer-readable storage medium provided by the embodiment of the present application is used to store a computer program, and the computer program enables a computer to execute the above-mentioned data forwarding method.

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

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

Through the above technical solution, the first terminal device is the publisher of the first MBMS service, other terminal devices (such as the second terminal device and the third terminal device) are the receivers of the first MBMS service, and the data of the first MBMS service passes the first MBMS service. The first base station where a terminal device is located performs the forwarding, which realizes the local forwarding of the first MBMS service data, improves the transmission efficiency of the MBMS service, reduces the end-to-end service delay and reduces the load of the access network.

Description of the drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The exemplary embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation of the application. In the attached picture:

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

FIG. 2 is a schematic diagram of 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 by an embodiment of the present application;

Fig. 4 is a PTM channel and its mapping diagram provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart of a data forwarding method provided by an embodiment of the application;

Fig. 6 is a schematic diagram of locally forwarding data of the first MBMS service provided by an embodiment of the application;

Fig. 7 is a network architecture diagram for locally forwarding MBMS service data provided by an embodiment of the application;

FIG. 8 is a schematic diagram of the structural composition of a data forwarding device provided by an embodiment of the application;

FIG. 9 is a schematic structural diagram of a communication device provided by 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 provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (Time Division Duplex) , TDD), system, 5G communication system or future communication system, etc.

Exemplarily, the 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 that communicates with a terminal device 120 (or called a communication terminal device or a terminal device). The network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area. Optionally, the network device 110 may be an evolved base station (Evolutional Node B, eNB, or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or The network equipment can be a mobile switching center, a relay station, an access point, an in-vehicle 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, etc.

The communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110. The "terminal equipment" used here includes but is not limited to connection via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, and direct cable connection ; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter; and/or another terminal device that is set to receive/send communication signals; and/or Internet of Things (IoT) equipment. A terminal device set to communicate through 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 phones; Personal Communications System (PCS) terminal devices that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, and the Internet /Intranet access, Web browser, memo pad, calendar, and/or PDA with Global Positioning System (GPS) receiver; and conventional laptop and/or palm-type receiver or including radio phone transceiver Other electronic devices. Terminal equipment can refer to access terminal equipment, user equipment (UE), user unit, user station, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, user terminal equipment, terminal equipment, wireless communication equipment , User agent or user device. Access terminal devices can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital processing (Personal Digital Assistant, PDA), and wireless Handheld devices with communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks, or terminal devices in the future evolution of PLMN, etc.

Optionally, terminal device to device (D2D) communication may be performed between the terminal devices 120.

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

Figure 1 exemplarily shows one network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.

Optionally, the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.

It should be understood that the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices. Taking the communication system 100 shown in FIG. 1 as an example, the communication device may include a network device 110 having a communication function and a terminal device 120. The network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here. The communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities and other network entities, which are not limited in the embodiment of the present application.

It should be understood that the terms "system" and "network" in this article are often used interchangeably in this article. The term "and/or" in this article is only an association relationship describing the associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

In order to facilitate the 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.

As people speed, latency, high-speed mobility, energy efficiency and the future of life in the pursuit of the business of diversity, complexity, for the third Generation Partnership Project ^{(3 rd Generation Partnership Project, 3GPP} ) ISO began the development of 5G . The main application scenarios of 5G are: Enhanced Mobile Broadband (eMBB), Ultra-Reliable Low-Latency Communications (URLLC), Massive Machine-Type Communications (mMTC) ).

On the one hand, eMBB still targets users to obtain multimedia content, services and data, and its demand is growing very rapidly. On the other hand, because eMBB may be deployed in different scenarios, such as indoors, urban areas, rural areas, etc., its capabilities and requirements are also quite different, so it cannot be generalized and must be analyzed in detail in conjunction with specific deployment scenarios. Typical applications of URLLC include: industrial automation, power automation, telemedicine operations (surgery), traffic safety protection, etc. Typical features of mMTC include: high connection density, small data volume, delay-insensitive services, low-cost modules and long service life.

In the early deployment of NR, complete NR coverage is difficult to obtain, so the typical network coverage is wide-area LTE coverage and NR island coverage mode. Moreover, a large amount of LTE is deployed below 6GHz, and there is very little spectrum below 6GHz that can be used for 5G. Therefore, NR must study the spectrum application above 6GHz, and the high frequency band has limited coverage and fast signal fading. At the same time, in order to protect mobile operators' early investment in LTE, a tight interworking mode between LTE and NR is proposed.

In order to achieve 5G network deployment and commercial applications as soon as possible, 3GPP first completed the first 5G version, EN-DC (LTE-NR Dual Connectivity). In EN-DC, an LTE base station (eNB) serves as a master node (Master Node, MN), and an NR base station (gNB or en-gNB) serves as a secondary node (Secondary Node, SN). In the later stage of R15, other DC modes will be supported, namely NE-DC, 5GC-EN-DC, and NR DC. For EN-DC, the core network connected to the access network is EPC, while the core network connected to other DC modes is 5GC.

RRC status

In order to reduce air interface signaling, quickly restore wireless connections, and quickly restore data services, 5G defines a new radio resource control (Radio Resource Control, RRC) state, that is, the RRC inactive (RRC_INACTIVE) state. This state is different from the RRC idle (RRC_IDLE) state and the RRC active (RRC_ACTIVE) state. in,

1) RRC_IDLE state (abbreviated as idle state): mobility is cell selection and reselection based on terminal equipment, paging is initiated by the Core Network (CN), and the paging area is configured by the CN. There is no terminal device context on the base station side, and no RRC connection.

2) RRC_CONNECTED state (referred to as connected state for short): there is an RRC connection, and there is a terminal device context on the base station side and the terminal device side. The network side knows that the location of the terminal equipment is of a specific cell level. Mobility is the mobility controlled by the network side. Unicast data can be transmitted between the terminal equipment and the base station.

3) RRC_INACTIVE state (abbreviated as inactive state): mobility is cell selection reselection based on terminal equipment, there is a connection between CN-NR, the context of terminal equipment exists on a certain base station, and paging is triggered by RAN The RAN-based paging area is managed by the RAN, and the network side knows that the location of the terminal equipment is based on the RAN paging area level.

MBMS

MBMS was introduced in 3GPP Release 6 (Release 6, R6). MBMS is a technology that transmits data from one data source to multiple terminal devices by sharing network resources. This technology can effectively utilize network resources while providing multimedia services. , To achieve higher rate (such as 256kbps) multimedia services broadcast and multicast.

Due to the low spectrum efficiency of MBMS in 3GPP R6, it is not sufficient to effectively carry and support the operation of mobile TV-type services. Therefore, in LTE, 3GPP clearly proposed to enhance the ability to support downlink high-speed MBMS services, and determined the design requirements for the physical layer and air interface.

3GPP R9 introduced evolved MBMS (evolved MBMS, eMBMS) into LTE. eMBMS proposes the concept of single frequency network (Single Frequency Network, SFN), namely Multimedia Broadcast Multicast Service Single Frequency Network (MBSFN), MBSFN uses a unified frequency to send service data in all cells at the same time, but To ensure synchronization between the cells. This method can greatly improve the overall signal-to-noise ratio distribution of the cell, and the spectrum efficiency will be greatly improved accordingly. eMBMS realizes the broadcast and multicast of services based on the IP multicast protocol.

In LTE or enhanced LTE (LTE-Advanced, LTE-A), MBMS has only a broadcast bearer mode, and no multicast bearer mode. In addition, the reception of MBMS services is suitable for terminal devices in idle state or connected state.

3GPP R13 introduced the single cell point to multipoint (Single Cell Point To Multiploint, SC-PTM) concept, which is based on the MBMS network architecture.

MBMS introduces new logical channels, including Single Cell-Multicast Control Channel (SC-MCCH) and Single Cell-Multicast Transport Channel (SC-MTCH). SC-MCCH and SC-MTCH are mapped to downlink shared channel (Downlink-Shared Channel, DL-SCH), and further, DL-SCH is mapped to physical downlink shared channel (Physical Downlink Shared Channel, PDSCH), where SC -MCCH and SC-MTCH belong to logical channels, DL-SCH belongs to transport channels, and PDSCH belongs to physical channels. SC-MCCH and SC-MTCH do not support Hybrid Automatic Repeat reQuest (HARQ) operations.

MBMS introduces a new type of System Information Block (SIB), namely SIB20. Specifically, the SC-MCCH configuration information is transmitted through SIB20, and there is only one SC-MCCH in a cell. The configuration information of the SC-MCCH includes: the modification period of the SC-MCCH, the repetition period of the SC-MCCH, and information such as radio frames and subframes for scheduling 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 configured in the SIB20 (ie, sc-mcch-ModificationPeriod). 2) The radio frame scheduling SC-MCCH satisfies: SFN mod mcch-RepetitionPeriod=mcch-Offset, where SFN represents the system frame number of the radio frame, mcch-RepetitionPeriod represents the repetition period of SC-MCCH, and mcch-Offset represents SC-MCCH The offset. 3) The subframe for scheduling SC-MCCH is indicated by sc-mcch-Subframe.

The SC-MCCH is scheduled through the Physical Downlink Control Channel (PDCCH). On the one hand, a new radio network temporary identity (Radio Network Tempory Identity, RNTI), namely single cell RNTI (Single Cell RNTI, SC-RNTI) is introduced to identify the PDCCH (such as SC-MCCH PDCCH) used to schedule SC-MCCH, Optionally, the fixed value of SC-RNTI is FFFC. On the other hand, a new RNTI is introduced, namely Single Cell Notification RNTI (SC-N-RNTI) to identify the PDCCH used to indicate the change notification of the SC-MCCH (such as the notification PDCCH). Optionally, the SC -N-RNTI has a fixed value of FFFB; further, one of the 8 bits (bits) of DCI 1C can be used to indicate the change notification. In LTE, the configuration information of the SC-PTM is based on the SC-MCCH configured by the SIB20, and then the SC-MCCH is configured with the SC-MTCH, and the SC-MTCH is used to transmit service data.

Specifically, the SC-MCCH only transmits one message (that is, SCPTMConfiguration), which is used to configure the configuration information of the SC-PTM. The configuration information of SC-PTM includes: Temporary Mobile Group Identity (TMGI), session identifier (seession id), group RNTI (Group RNTI, G-RNTI), discontinuous reception (Discontinuous Reception, DRX) configuration information And the SC-PTM business information of the neighboring cell, etc. It should be noted that the SC-PTM in R13 does not support Robust Header Compression (ROHC) function.

The downlink discontinuous reception of SC-PTM is controlled by the following parameters: onDurationTimerSCPTM, drx-InactivityTimerSCPTM, SC-MTCH-SchedulingCycle, and SC-MTCH-SchedulingOffset.

When [(SFN*10)+subframe number]modulo(SC-MTCH-SchedulingCycle)=SC-MTCH-SchedulingOffset is satisfied, start the timer onDurationTimerSCPTM;

When receiving the downlink PDCCH scheduling, start the timer drx-InactivityTimerSCPTM;

Only when the timer onDurationTimerSCPTM or drx-InactivityTimerSCPTM is running, the downlink SC-PTM service is received.

SC-PTM service continuity adopts the concept of MBMS service continuity based on SIB15, namely "SIB15+MBMSInterestIndication" mode. The business continuity of the idle state terminal equipment is based on the concept of frequency priority.

In NR, many scenarios need to support the service requirements of multicast and broadcast, such as the Internet of Vehicles and the Industrial Internet. So it is necessary to introduce MBMS in NR. To support the MBMS service in the connected state, the terminal device can receive the MBMS service in the connected state, and the receiving information of the MBMS service can be synchronized at any time between the network side and the terminal device and between the core network. The terminal device can be the issuer of the MBMS service or the receiver of the MBMS service. When the connected terminal device receives the MBMS service, it will establish a bearer to the core network, and receive the MBMS service data from the core network through the bearer. If one terminal device is the issuer of the MBMS service and the other terminal device is the receiver of the MBMS service, how to efficiently realize the transmission of the MBMS service is very important. For this reason, the following technical solutions of the embodiments of the present application are proposed. The technical solution of the embodiment of the present application provides a solution for local forwarding of MBMS service data, which reduces the end-to-end service delay and reduces the load of the access network. It should be noted that the MBMS in the embodiments of the present application may also refer to multicast or multicast or broadcast.

In the technical solution of the embodiment of this application, a new SIB (called the first SIB) is defined. Referring to FIG. 2, the first SIB includes the configuration information of the first MCCH. Here, the first MCCH is the control channel of the MBMS service. In other words, the first SIB is used to configure the configuration information of the control channel of NR MBMS. Optionally, the control channel of NR MBMS may also be called NR MCCH (that is, the first MCCH).

Further, the first MCCH is used to carry the first signaling. The embodiment of the present application does not limit the name of the first signaling. For example, the first signaling is signaling A, and the first signaling includes at least one first MTCH. Here, the first MTCH is a service channel of the MBMS service (also referred to as a data channel or a transmission channel), and the first MTCH is used to transmit MBMS service data (such as NR MBMS service data). In other words, the first MCCH is used to configure the configuration information of the NR MBMS traffic channel. Optionally, the NR MBMS traffic channel may also be called NR MTCH (that is, the first MTCH).

Specifically, the first signaling is used to configure a NR MBMS service channel, 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, such as TMGI, session id, and other service identification information identifying the service. 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, such as G-RNTI, DRX configuration information, and so on.

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 for scheduling the PDCCH of the first MCCH uses a unique identifier of the entire network, that 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 the embodiment of the present application does not impose restrictions on the naming of the first SIB, the first MCCH, and the first MTCH. For ease 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. Referring to FIG. 3, the PDCCH used to schedule the MCCH is configured through the SIB. (Ie MCCH PDCCH) and notification PDCCH, wherein the DCI carried by the MCCH PDCCH is used to schedule the PDSCH (ie MCCH PDSCH) used to transmit the MCCH. Further, M PDCCHs (that is, MTCH 1 PDCCH, MTCH 2 PDCCH, ..., MTCH M PDCCH) are configured through the MCCH, where the DCI carried by the MTCH n PDCCH schedules the PDSCH used to transmit the MTCH n (that is, the MTCH n PDSCH), n is an integer greater than or equal to 1 and less than or equal to M. 4, MCCH and MTCH are mapped to DL-SCH, and further, DL-SCH is mapped to PDSCH, where MCCH and MTCH belong to logical channels, DL-SCH belongs to transport channels, and PDSCH belongs to physical channels.

Fig. 5 is a schematic flowchart of a data forwarding method provided by an embodiment of the application. As shown in Fig. 5, the data forwarding method includes the following steps:

Step 501: The first base station receives the data of the first MBMS service sent by the first terminal device.

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

Step 502: 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 the second base station, and The data of the first MBMS service is forwarded by the second base station to the third terminal device.

In an optional manner of the present application, the first base station receives first indication information sent by the core network, where the first indication information is used to indicate whether the data of the first MBMS service is forwarded locally or by the core network In the case where 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 the second terminal device, and/or, the The first base station forwards the data of the first MBMS service to the second base station.

In the embodiment of the present application, the second terminal device and/or the third terminal device are recipients of the first MBMS service. It should be noted that the embodiment of the present application takes one second terminal device as an example for description, and it is not limited to this, and the number of second terminal devices may also be multiple. It should be noted that the embodiment of the present application takes a third terminal device as an example for description, and it is not limited to this, and the number of third terminal devices may also 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 where the second terminal device and the first terminal device are located are both cells covered by the first base station. In an optional manner, the cell where the second terminal device is located is the same as the cell where the first terminal device is located. For example, the cell where the second terminal device is located and the cell where the first terminal device is located are both cell 1 under the first base station. In another optional manner, the cell where the second terminal device is located is different from the cell where the first terminal device is located. For example, the cell where the second terminal device is located is cell 1 under the first base station, and the cell where the first terminal device is located is 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 the RLC SDU of the data of the first MBMS service; the first base station The RLC SDU of the data of the first MBMS service is forwarded to the second terminal device.

2) For the third terminal equipment, the base station serving the third terminal equipment is the second base station, that is, the cell where the third terminal equipment is located is the cell covered by the second base station, and the cell where the first terminal equipment is located is the second base station. A cell covered by a base station. For example, the cell where the third terminal device is located is cell 3 under the second base station, and the cell where the first terminal device is located is 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 data of the first MBMS service is transferred from the first base station to the second base station. The second base station forwards it 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 the RLC SDU of the data of the first MBMS service; the first base station The RLC SDU of the data of the first MBMS service is forwarded to the second base station, and the RLC SDU of the data of the first MBMS service is processed by the second base station and forwarded to the 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. Alternatively, 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 by the second base station to the third terminal device. Alternatively, 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 by the second base station to the third terminal device.

In an optional manner of this application, the data of the first MBMS service is scheduled by the second base station according to G-RNTI; or, the data of the first MBMS service is scheduled by the second base station according to C-RNTI. RNTI performs data scheduling.

Referring to FIG. 6, FIG. 6 is a schematic diagram of locally forwarding the data of the first MBMS service, 1) UE1 sends the data of the first MBMS service to the base station 1. II) After the base station 1 receives the data of the first MBMS service, it performs data processing on it. After processing at the Radio Link Control (RLC) layer, it obtains the RLC SDU with the data of the first MBMS service. . III) The base station 1 forwards the RLC SDU of the first MBMS service data directly to the UE2, and/or forwards it to the base station 2 through the GTP tunnel. V) After base station 2 receives the RLC SDU of the first MBMS service data, it passes through the RLC layer, the media access control (MAC) layer, and the physical (PHY) layer on the air interface, and then sends it to the UE3,4 ,5,6. Here, the base station 2 may choose to perform data scheduling of the first MBMS service according to G-RNTI, or perform data scheduling of the first MBMS service according to C-RNTI (ie, UE-specific RNTI).

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

The first base station receives second indication information sent by the 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. Further, optionally, the second indication information is also used to indicate the service identifier of the first MBMS service.

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

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

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

In the embodiments of the present application, in order to implement the core network to accurately deliver the second indication information to the first base station, the core network needs to collect base station information and/or cell information where the terminal equipment that needs to receive the first MBMS service is located. Specifically, this can be achieved by the following terminal equipment and/or base station reporting methods: For any terminal equipment 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 of the cell The information is reported to the core network by the terminal device; or the identification information of the base station where the terminal device is located and/or the identification information of the cell is reported to the core network by the base station where the terminal device is located.

In the embodiment of this application, during the process of locally forwarding the data of the first MBMS service, handover may occur. The object of the handover may be the third terminal device that receives the data of the first MBMS service, or it may be The first terminal device that releases the data of the first MBMS service will be described below in combination with different situations.

Case 1: The third terminal device receiving the data of the first MBMS service 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.

In response to this situation, the first base station needs to update the base station to be forwarded (that is, 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 the core network The third indication information sent, 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, and the released first 2. Identification information of the 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 (that is, the third base station) of the handover, the following operations need to be performed: the first base station establishes a GTP tunnel with the third base station, and passes the RLC SDU of the data of the first MBMS service through The GTP tunnel is forwarded to the third base station, 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.

Here, for the source base station of the handover (that is, the second base station), the following operation needs to be performed: the first base station releases the GTP tunnel with the second base station.

In an optional manner of this application, during the handover process, the indication information used to indicate the switching of the third terminal device, the indication information used to indicate the service identity of the third terminal device, and the first MBMS At least one of the service identifiers of the services is sent by the second base station to the core network; or, the indication information used to indicate the switching of the third terminal device, the indication information used to indicate the third terminal device At least one of the indication information of the service identity and the service identity of the first MBMS service is sent by the third base station to the core network.

In an optional manner of the present application, after the handover is completed, 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 service is determined by the first MBMS service. Three terminal equipment reports to the core network; or, 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 service is sent by the third base station Report to the core network.

The following describes the switching of the terminal device receiving the first MBMS service in conjunction with a specific example.

UE1 is a terminal device that releases the first MBMS service. The cell where UE1 is located is cell 3 covered by base station 1. UE3 is a terminal device that receives the first MBMS service. UE3 is from cell 1 (called cell 1) covered by base station 2 (referred to as the source base station). The source cell is handed over to the cell 4 (referred to as the target cell) covered by the base station 3 (referred to as the target base station).

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

2. After the handover is completed, the UE3 notifies the core network of at least one of the following: identification information of the currently serving base station (ie target base station), identification information of the currently serving cell (ie target cell), and service identification of the first MBMS service.

3. The core network informs base station 1 of at least one of the following: 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, the first MBMS service Business identity.

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

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

6. The target base station configures UE3 with configuration information about the reception of the first MBMS service, such as G-RNTI used to schedule the first MBMS service, DCI used to identify the first MBMS service, and so on.

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

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

Case 2: The first terminal device that publishes the data of the first MBMS service is switched.

Here, the first terminal device switches from the third cell of the first base station to the fourth cell of the fourth base station.

In response to 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 the information of the base station where the terminal equipment that needs to receive the first MBMS service is located. The identification information and/or the identification information of the cell. Further, optionally, the fourth indication information is also used to indicate the 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 above solution. Specifically, the fourth indication information includes identification information of one or more second base stations. The base station refers to the base station where the terminal equipment that needs to receive the first MBMS service is located; and/or, the fourth indication information includes identification information of one or more cells, and the cell refers to the first MBMS that needs to receive the first MBMS service. The cell where the terminal equipment of the business is located.

Here, for the target base station (that is, the fourth base station) of the handover, the following operations need to be performed: for each second base station of the one or more second base stations, the fourth base station establishes a connection with the second base station The GTP tunnel for forwarding the RLC SDU of the data of the first MBMS service to the second base station through the GTP tunnel.

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

Here, for the handover source base station (ie, the first base station), the following operations need to be performed: the second base station initiates the release of the GTP tunnel between the second base station and the first base station. Request for release; or, for the GTP tunnel between the second base station and the first base station, the first base station initiates a release request to the second base station for release.

In an optional manner of the present application, during the handover process, the indication information used to indicate the handover of the first terminal device, the indication information used to indicate the service identity of the first terminal device, and the first MBMS At least one of the service identifiers of the services is sent by the first base station to the core network; or, the indication information used to indicate the handover of the first terminal device, the indication information used to indicate the first terminal device At least one of the indication information of the service identity and the service identity of the first MBMS service is sent by the fourth base station to the core network.

In an optional manner of the present application, after the handover is completed, 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 service is determined by the first MBMS service. A terminal device reports to the core network; or, 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 service is used by the fourth base station Report to the core network.

The following describes the switching of the terminal device that releases the first MBMS service in conjunction with a specific example.

UE3 is a terminal device that receives the first MBMS service. The cell where UE3 is located is cell 1 covered by base station 2. UE1 is a terminal device that releases the first MBMS service. UE1 is a cell 3 (called source base station) covered by base station 1 (called the source base station). The source cell is handed over to the cell 4 (referred to as the target cell) covered by the base station 3 (referred to as the target base station).

1. The target base station or the source base station instructs at least one of the following in the core network: UE1 comes to a new target base station, the service identity of UE1 (that is, the MBMS service is released), and the service identity of the first MBMS service.

2. After the handover is completed, UE1 notifies the core network of at least one of the following: identification information of the currently serving base station (ie target base station), identification information of the currently serving cell (ie target cell), and service identification of the first MBMS service.

3. The core network or the source base station notifies the target base station of at least one of the following: the service identifier of the first MBMS service, a list of base stations where UEs that need to receive the first MBMS service are located, and a list of cells where UEs that need to receive the first MBMS service are located.

4. The target base station sends a multicast service establishment request message to each base station in the base station list, and the multicast service establishment request message carries the service identifier of the first MBMS service.

Optionally, the multicast service establishment request message carries indication information, which is used to indicate that the service establishment request is caused by the UE1 issuing the first MBMS service switching to a new target base station.

5. Each base station in the base station list replies to the target base station with a multicast service establishment response message, and the multicast service establishment response message carries an identifier of the GTP tunnel established for the first MBMS service.

6. Each base station in the base station list is based on the service identification and/or indication information of the first MBMS service carried in the multicast service establishment request message (the indication information is used to indicate that the service establishment request is due to the issuance of the first MBMS service). UE1 is handed over to the new target base station), and requests the source base station to release the GTP tunnel with the source base station. Alternatively, 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 provided by an embodiment of the application. It should be noted that the MBMS service data is the data of the first MBMS service in the above-mentioned solution of the application. Referring to Figure 7, the local forwarding of MBMS service data includes the following processes:

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

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

1.2. The core network indicates to the base station 1 whether the MBMS service data is forwarded locally or through the core network.

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

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

Here, UE2, 3, 4, 5, and 6 refer to UE2, UE3, UE4, UE5, and UE6.

3. Notify the core network UE2, 3, 4, 5, 6 of the identification information of the base station and/or the identification information of the cell.

Here, the base station (such as base station 1 and base station 2) may notify the core network UE2, 3, 4, 5, 6 of the identification information of the base station and/or the identification information of the cell. Alternatively, the UE (such as UE2, 3, 4, 5, 6) informs the core network of the identification information of the base station where the UE 2, 3, 4, 5, and 6 are located and/or the identification information of the cell.

For example: base station 1 and base station 2 report to the core network that there are UEs in their cells that need to receive (or are interested in) MBMS services, and notify the core network of the identification information of the base station where UE2, 3, 4, 5, and 6 are located and/or the cell Identification information. Further, the service identifier of the MBMS service of the core network can also be notified.

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

Optionally, the core network also 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, and 6 are located may be referred to as a base station list, and the identification information of the cell where the UE2, 3, 4, 5, and 6 are located may be referred to as the cell list.

5. If the core network indicates that the MBMS service data is forwarded locally, 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 UE1 based on the GTP tunnel To each base station.

Specifically, base station 1 initiates a GTP tunnel establishment request for MBMS service forwarding to each base station in the base station list, and each base station will allocate and notify base station 1 of the GTP tunnel identifier for MBMS service forwarding. Base station 1 forwards the RLC SDU sent by UE1 to each base station based on the GTP tunnel identifier. Further, optionally, the base station 1 may also send a cell list associated with the base station to each base station, and the cell list is used by the base station to determine the set of cells that need to send MBMS service data. The base station can send MBMS service data in all cells or some cells (for example, the base station 1 provides a cell list).

FIG. 8 is a schematic diagram of the structural composition of a data forwarding device provided by an embodiment of the application, which is applied to a first base station. As shown in FIG. 8, the data forwarding device includes:

The receiving unit 801 is configured to receive data of the first MBMS service sent by the first terminal device;

The forwarding unit 802 is 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, and the data of the first MBMS service is transferred from The second base station forwards it to the third terminal device.

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

The processing unit 803 is configured to process the data of the first MBMS service after receiving the data of the first MBMS service to obtain the 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 the RLC SDU of the data of the first MBMS service is assigned by the first MBMS service data. After being processed by the second base station, it is forwarded to the third terminal device.

In an optional manner of this application, the data of the first MBMS service is scheduled by the second base station according to G-RNTI; or,

The data of the first MBMS service is scheduled by the second base station 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 the core network, where the first indication information is used to indicate whether the data of the first MBMS service is forwarded locally or Forwarded by the core network;

In the case where 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 the second terminal device, and/or, the data of the first MBMS service is forwarded to the second terminal device; One MBMS service data is forwarded to the second base station.

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

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

In an optional manner of the present application, the second indication information includes identification information of one or more second base stations, and the second base station refers to 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 of one or more cells, and the cell refers to a cell where a terminal device that needs to receive the first MBMS service is located.

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

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

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 the present application, the forwarding unit 802 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 determines a set of cells for transmitting the data of the first MBMS service.

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

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

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

In an optional manner of the present application, when 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 the 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, and the newly added identification information of the third base station; The 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.

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

An establishment unit for establishing a GTP tunnel with the third base station;

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

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

The releasing unit (not shown in the figure) is used to release the GTP tunnel with the second base station.

In an optional manner of this application, during the handover process, the indication information used to indicate the switching of the third terminal device, the indication information used to indicate the service identity of the third terminal device, and the first MBMS At least one of the service identifiers of the services is sent by the second base station to the core network; or,

At least one of the indication information used to indicate the switching of the third terminal device, the indication information used to indicate the service identity of the third terminal device, and the service identity of the first MBMS service is determined by the first MBMS service. The three base stations send to the core network.

In an optional manner of the present application, after the handover is completed, 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 service is determined by the first MBMS service. Three terminal equipment reports to the core network; or,

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 service is reported to the core network by the third base station.

In an optional manner of the present application, when 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 the identification information and/or cell of the base station where the terminal device that needs to receive the first MBMS service is located的identification information.

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

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

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

In an optional manner of the present application, during the handover process, the indication information used to indicate the handover of the first terminal device, the indication information used to indicate the service identity of the first terminal device, and the first MBMS At least one of the service identifiers of the services is sent by the first base station to the core network; or,

At least one of the indication information used to indicate the handover of the first terminal device, the indication information used to indicate the service identity of the first terminal device, and the service identity of the first MBMS service is determined by the first terminal device. Four base stations send to the core network.

In an optional manner of the present application, after the handover is completed, 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 service is determined by the first MBMS service. A terminal device reports to the core network; or,

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 service is reported to the core network by the fourth base station.

Those skilled in the art should understand that the relevant description of the foregoing data forwarding apparatus in the embodiment of the present application can be understood with reference to the relevant description of the data forwarding method in the embodiment of the present application.

FIG. 9 is a schematic structural diagram of a communication device 900 provided by an embodiment of the present application. The communication device may be a terminal device or a network device (such as a base station). The communication device 900 shown in FIG. 9 includes a processor 910. The processor 910 can call and run a computer program from a memory to implement the embodiments of the present application. In the method.

Optionally, as shown in FIG. 9, the communication device 900 may further include a memory 920. The processor 910 may call and run a computer program from the memory 920 to implement the method in the embodiment of the present application.

The memory 920 may be a separate device independent of 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. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.

Wherein, the transceiver 930 may include a transmitter and a receiver. The transceiver 930 may further include an antenna, and the number of antennas may be one or more.

Optionally, the communication device 900 may specifically be a network device of an embodiment of the application, and the communication device 900 may implement the corresponding process implemented by the network device in each method of the embodiment of the application. For the sake of brevity, details are not repeated here. .

Optionally, the communication device 900 may specifically be a mobile terminal device/terminal device of an embodiment of the application, and the communication device 900 may implement the corresponding processes implemented by the mobile terminal device/terminal device in each method of the embodiment of the application. For the sake of brevity, I will not repeat them here.

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 can call and run a computer program from the 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. The processor 1010 can call and run a computer program from the memory 1020 to implement the method in the embodiment of the present application.

The memory 1020 may be a separate device independent of the processor 1010, or may be integrated in the processor 1010.

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

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

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

Optionally, the chip can be applied to the mobile terminal device/terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the mobile terminal device/terminal device in each method of the embodiment of the present application. For the sake of brevity, I won't repeat them here.

It should be understood that the chip mentioned in the embodiment of the present application may also be referred to as a system-level chip, 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 according to 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.

Wherein, the terminal device 1110 can be used to implement the corresponding function implemented by the terminal device in the above method, and the network device 1120 can be used to implement the corresponding function implemented by the network device in the above method. For brevity, it will not be repeated here. .

It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments may be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), Synchronous Link Dynamic Random Access Memory (Synchlink DRAM, SLDRAM) ) And Direct Rambus RAM (DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

It should be understood that the foregoing memory is exemplary but not restrictive. For example, the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is to say, the memory in the embodiments of the present application is intended to include, but is not limited to, these and any other suitable types of memory.

The embodiments of the present application also provide a computer-readable storage medium for storing computer programs.

Optionally, the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, here No longer.

Optionally, the computer-readable storage medium can be applied to the mobile terminal device/terminal device in the embodiment of the present application, and the computer program causes the computer to execute the methods implemented by the mobile terminal device/terminal device in the embodiments of the present application. For the sake of brevity, the corresponding process will not be repeated here.

The embodiments of the present application also provide a computer program product, including computer program instructions.

Optionally, the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, it is not here. Go into details again.

Optionally, the computer program product can be applied to the mobile terminal device/terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding methods implemented by the mobile terminal device/terminal device in the various methods of the embodiments of the present application. For the sake of brevity, the process will not be repeated here.

The embodiment of the present application also provides a computer program.

Optionally, the computer program can be applied to the network device in the embodiment of the present application. When the computer program runs on the computer, it causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity , I won’t repeat it here.

Optionally, the computer program can be applied to the mobile terminal device/terminal device in the embodiment of the present application. When the computer program runs on the computer, the computer executes each method in the embodiment of the present application by the mobile terminal device/terminal device. For the sake of brevity, the corresponding process implemented by the device will not be repeated here.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

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

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disks or optical disks and other media that can store program codes. .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims (54)

1. A data forwarding method, the method includes:

   The first base station receives the data of the MBMS service of the first multimedia broadcast multicast service sent by the first terminal device;

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

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

   The first base station forwards the RLC SDU of the data of the first MBMS service to the second terminal device.
4. The method according to claim 2, wherein the first base station forwarding the data of the first MBMS service to the second base station comprises:

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

   The data of the first MBMS service is scheduled by the second base station according to G-RNTI; or,

   The data of the first MBMS service is scheduled by the second base station according to the C-RNTI.
6. The method according to any one of claims 1 to 5, wherein the method further comprises:

   Receiving, by the first base station, first indication information sent by a core network, where the first indication information is used to indicate whether the data of the first MBMS service is forwarded locally or by the core network;

   The first base station forwarding the first MBMS service data to the second terminal device, and/or the first base station forwarding the first MBMS service data to the second base station includes:

   In the case where 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 the second terminal device, and/or, the first base station A base station forwards the data of the first MBMS service to the second base station.
7. The method according to any one of claims 1 to 6, wherein the method further comprises:

   The first base station receives second indication information sent by the 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.
8. The method according to claim 7, wherein the second indication information is also used to indicate the service identity of the first MBMS service.
9. The method according to claim 7 or 8, wherein:

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

    For each second base station of the one or more second base stations, the first base station establishes a GTP tunnel with the second base station, and passes the RLC SDU of the first MBMS service data through the GTP The tunnel is forwarded to the second base station.
11. The method according to claim 10, wherein the method further comprises:

    The first base station sends the 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 by the second base station to determine to send the first MBMS service. The collection of data cells.
12. The method according to any one 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 device is located and/or the identification information of the cell are reported by the terminal device to the core network; or,

    The identification information of the base station where the terminal device is located and/or the identification information of the cell is reported to the core network by the base station where the terminal device is located.
13. The method according to any one of claims 1 to 12, wherein when 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 method further include:

    The first base station receives third indication information sent by the 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 second cell Identification information, 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.
14. The method according to claim 13, wherein the method further comprises:

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

    The first base station releases the GTP tunnel with the second base station.
16. The method according to any one of claims 13 to 15, wherein, during the handover process,

    At least one of the indication information used to indicate the handover of the third terminal device, the indication information used to indicate the service identity of the third terminal device, and the service identity of the first MBMS service is determined by the first MBMS service. The second base station sends to the core network; or,

    At least one of the indication information used to indicate the switching of the third terminal device, the indication information used to indicate the service identity of the third terminal device, and the service identity of the first MBMS service is determined by the first MBMS service. The three base stations send to the core network.
17. The method according to any one of claims 13 to 16, wherein, after the handover is completed,

    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 service is reported to the core network by the third terminal device; or,

    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 service is reported to the core network by the third base station.
18. The method according to any one of claims 1 to 12, wherein when the first terminal device switches from the third cell of the first base station to the fourth cell of the fourth base station, the method further include:

    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 the identification information and/or the identification information of the base station where the terminal device that needs to receive the first MBMS service is located The identification information of the cell.
19. The method according to claim 18, wherein the fourth indication information is also used to indicate the service identifier of the first MBMS service.
20. The method according to claim 18 or 19, wherein:

    The fourth indication information includes identification information of one or more second base stations, and the second base station refers to 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, and the cell refers to a cell where a terminal device that needs to receive the first MBMS service is located.
21. The method according to claim 20, wherein the method further comprises:

    For each second base station of the one or more second base stations, the fourth base station establishes a GTP tunnel with the second base station, and passes the RLC SDU of the first MBMS service data through the GTP The tunnel is forwarded to the second base station.
22. The method according to claim 21, wherein the establishing a GTP tunnel between the fourth base station and the second base station comprises:

    Sending, by the fourth base station, an MBMS service establishment request message to the second base station, where the MBMS service establishment request message carries the service identifier of the first MBMS service;

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

    The 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 GTP tunnel between the second base station and the first base station is released by the first base station initiating a release request to the second base station.
25. The method according to any one of claims 18 to 24, wherein, during the handover process,

    At least one of the indication information used to indicate the handover of the first terminal device, the indication information used to indicate the service identity of the first terminal device, and the service identity of the first MBMS service is determined by the first terminal device. A base station sends to the core network; or,

    At least one of the indication information used to indicate the handover of the first terminal device, the indication information used to indicate the service identity of the first terminal device, and the service identity of the first MBMS service is determined by the first terminal device. Four base stations send to the core network.
26. The method according to any one of claims 18 to 25, wherein, after the handover is completed,

    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 service is reported to the core network by the first terminal device; or,

    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 service is reported to the core network by the fourth base station.
27. A data forwarding device, the device comprising:

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

    The forwarding unit is configured to forward the data of the first MBMS service to the second terminal device, and/or forward the data of the first MBMS service to the second base station, and the data of the first MBMS service is transferred to the second base station. The second base station forwards it to the third terminal device.
28. The device according to claim 27, wherein the device further comprises:

    The processing unit is configured to process the data of the first MBMS service after receiving the data of the first MBMS service to obtain the RLC SDU of the data of the first MBMS service.
29. The apparatus according to claim 28, wherein the forwarding unit is configured to forward the RLC SDU of the data of the first MBMS service to the second terminal device.
30. The device according to claim 28, wherein the forwarding unit is configured to forward the RLC SDU of the data of the first MBMS service to the second base station, and the RLC SDU of the data of the first MBMS service is transferred by the After being processed by the second base station, it is forwarded to the third terminal device.
31. The device of claim 30, wherein:

    The data of the first MBMS service is scheduled by the second base station according to G-RNTI; or,

    The data of the first MBMS service is scheduled by the second base station according to the C-RNTI.
32. 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, and the first indication information is used to indicate the first MBMS service Whether the data is forwarded locally or by the core network;

    In the case where 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 the second terminal device, and/or, the data of the first MBMS service is forwarded to the second terminal device; One MBMS service data is forwarded to the second base station.
33. 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 the core network, and the second indication information is used to indicate that the first indication information needs to be received. The identification information of the base station where the terminal equipment of the MBMS service is located and/or the identification information of the cell.
34. The apparatus according to claim 33, wherein the second indication information is further used to indicate a service identity of the first MBMS service.
35. The device according to claim 33 or 34, wherein:

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

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

    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.
37. The device according to 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, wherein the identification information of the at least one cell is used The second base station determines the cell set for transmitting the data of the first MBMS service.
38. The apparatus according to 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 device is located and/or the identification information of the cell are reported by the terminal device to the core network; or,

    The identification information of the base station where the terminal device is located and/or the identification information of the cell is reported to the core network by the base station where the terminal device is located.
39. The apparatus according to any one of claims 27 to 38, wherein when 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 is further configured to receive third indication information sent by the 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, and the newly-added second The 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.
40. The device according to claim 39, wherein the device further comprises:

    An establishment unit for establishing a GTP tunnel with the third base station;

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

    The releasing unit is used to release the GTP tunnel with the second base station.
42. The device according to any one of claims 39 to 41, wherein, during the switching process,

    At least one of the indication information used to indicate the switching of the third terminal device, the indication information used to indicate the service identity of the third terminal device, and the service identity of the first MBMS service is determined by the first MBMS service. The second base station sends to the core network; or,

    At least one of the indication information used to indicate the switching of the third terminal device, the indication information used to indicate the service identity of the third terminal device, and the service identity of the first MBMS service is determined by the first MBMS service. The three base stations send to the core network.
43. The device according to any one of claims 39 to 42, wherein after the switching is completed,

    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 service is reported to the core network by the third terminal device; or,

    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 service is reported to the core network by the third base station.
44. The apparatus according to any one of claims 27 to 38, wherein when 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 the identification information and/or cell of the base station where the terminal device that needs to receive the first MBMS service is located的identification information.
45. The apparatus according to claim 44, wherein the fourth indication information is further used to indicate a service identity of the first MBMS service.
46. The device according to claim 44 or 45, wherein:

    The fourth indication information includes identification information of one or more second base stations, and the second base station refers to 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, and the cell refers to a cell where a terminal device that needs to receive the first MBMS service is located.
47. The device according to any one of claims 44 to 46, wherein:

    The 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 GTP tunnel between the second base station and the first base station is released by the first base station initiating a release request to the second base station.
48. The device according to any one of claims 44 to 47, wherein, during the switching process,

    At least one of the indication information used to indicate the handover of the first terminal device, the indication information used to indicate the service identity of the first terminal device, and the service identity of the first MBMS service is determined by the first terminal device. A base station sends to the core network; or,

    At least one of the indication information used to indicate the handover of the first terminal device, the indication information used to indicate the service identity of the first terminal device, and the service identity of the first MBMS service is determined by the first terminal device. Four base stations send to the core network.
49. The device according to any one of claims 44 to 48, wherein after the switching is completed,

    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 service is reported to the core network by the first terminal device; or,

    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 service is reported to the core network by the fourth base station.
50. A communication device, comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute any one of claims 1 to 26 Methods.
51. A chip comprising: a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the method according to any one of claims 1 to 26.
52. A computer-readable storage medium for storing a computer program that enables a computer to execute the method according to any one of claims 1 to 26.
53. A computer program product comprising computer program instructions that cause a computer to execute the method according to any one of claims 1 to 26.
54. A computer program that causes a computer to execute the method according to any one of claims 1 to 26.

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