WO2020124373A1 - 一种组播通信方法及相关设备 - Google Patents

一种组播通信方法及相关设备 Download PDF

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Publication number
WO2020124373A1
WO2020124373A1 PCT/CN2018/121791 CN2018121791W WO2020124373A1 WO 2020124373 A1 WO2020124373 A1 WO 2020124373A1 CN 2018121791 W CN2018121791 W CN 2018121791W WO 2020124373 A1 WO2020124373 A1 WO 2020124373A1
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multicast
configuration information
frequency domain
domain resource
access network
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PCT/CN2018/121791
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English (en)
French (fr)
Inventor
官磊
刘江华
李秉肇
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华为技术有限公司
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Priority to PCT/CN2018/121791 priority Critical patent/WO2020124373A1/zh
Priority to CN201880100320.0A priority patent/CN113228712B/zh
Publication of WO2020124373A1 publication Critical patent/WO2020124373A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Definitions

  • the invention relates to the technical field of terminals, in particular to a multicast communication method and related equipment.
  • the LTE system provides downlink data transmission services to terminal equipment.
  • Downlink data transmission can be roughly divided into two types: unicast (Unicast) and multicast (that is, broadcast multicast).
  • Unicast is mainly a kind of point-to-point communication, that is, a single-point communication between an access network device (such as a base station) and a terminal device.
  • Multicast is usually point-to-multipoint communication. For example, multiple terminal devices receive the same service at the same time. For example, video conferencing, television broadcasting and video on demand are typical multicast services.
  • the embodiment of the invention discloses a multicast communication method and related equipment, which can perform multicast communication.
  • an embodiment of the present application provides a multicast communication method.
  • the method includes: a terminal device receives multicast configuration information from an access network device in an initial frequency domain resource, and the multicast configuration information includes a first frequency domain resource And at least one set of first configuration information corresponding to the first frequency domain resource, where the first configuration information includes a multicast data cell identifier, and the multicast area corresponding to the multicast data cell identifier is used for multicast within the first frequency domain resource Data; the terminal device receives the multicast data sent by the access network device according to the first frequency domain resource and the first configuration information. Based on the method described in the first aspect, multicast communication can be performed between the terminal device and the access network device.
  • the terminal device may also receive multicast configuration information from the other frequency resources, for example, the other frequency resources may be indicated through PBCH or SIB1 or other SIB.
  • the multicast configuration information further includes second configuration information, and the second configuration information includes a search space of the multicast control channel and/or a set of control resources in the second frequency domain resource.
  • the terminal device may also The configuration information detects the first multicast control channel in the second frequency domain resource; the terminal device specifically receives the multicast data sent by the access network device in the first frequency domain resource according to the first configuration information and the first multicast control channel .
  • the access network device can dynamically schedule multicast data.
  • the first configuration information further includes a multicast wireless network temporary identifier RNTI corresponding to the multicast data cell identifier, and the cyclic redundancy check CRC information of the first multicast control channel is scrambled by the multicast RNTI.
  • the access network device can scramble the CRC of the first multicast control channel.
  • the terminal device may also detect the synchronization signal and determine the current cell identity according to the synchronization signal; the modulation symbol of the first multicast control channel is scrambled by the current cell identity.
  • the access network device may use the real cell identification of each cell (that is, the cell identification corresponding to the synchronization signal) to scramble the modulation symbol of the first multicast control channel, which is beneficial to the access network
  • the device independently sends the first multicast control channel to each cell, and does not use the multi-cell SFN mode to send the first multicast control channel.
  • the modulation symbol of the first multicast control channel is scrambled by the multicast data cell identifier.
  • the multicast data cell identifier is used to scramble the modulation symbol of the first multicast control channel, which can facilitate the access network device to send the first multicast control channel to each cell in an SFN manner to obtain The signal combining gain of SFN.
  • the first configuration information further includes a multicast control cell ID, which is independent of the multicast data cell ID and the cell ID corresponding to the synchronization signal, and the synchronization signal is used for the terminal device and the access network device
  • the signal for synchronization; the modulation symbol of the first multicast control channel is scrambled by the multicast control cell identifier.
  • the multicast control cell identifier is used to scramble the modulation symbol of the first multicast control channel, which can facilitate the access network device to send the first multicast control channel to each cell in the SFN manner to obtain The signal combining gain of SFN.
  • the second frequency domain resource is the initial frequency domain resource or the first frequency domain resource, or the second frequency domain resource is included in the second configuration information.
  • the multicast area includes multiple cells. If the multicast area is composed of multiple cells, since the range of the multicast area is larger than that of a single cell, when the terminal device switches to an adjacent cell, it is beneficial to reduce the impact on service continuity. And because the multicast area is composed of multiple cells, there is a high probability that multiple terminal devices enjoy services of the same content in the multicast area, and the gain is more obvious than unicast transmission.
  • the first configuration information further includes a cell list, and the cell list includes multiple cells.
  • the continuity and mobility of the multicast service can be improved.
  • At least two of the multiple cells in the multicast area send the same multicast data on the same time-frequency resource. This is beneficial to increase the transmission signal strength and improve the spectrum efficiency.
  • the multicast data cell identifier is independent of the cell identifier corresponding to the synchronization signal, and the synchronization signal is a signal used for synchronization between the terminal device and the access network device.
  • the access network equipment By independently configuring the multicast data cell identifier, it is advantageous for the access network equipment to send multicast data in SFN mode to obtain the SFN signal combining gain.
  • the first configuration information further includes multicast TDD slot type configuration information corresponding to the multicast data cell ID and/or multicast rate matching information corresponding to the multicast data cell ID. Based on this optional embodiment, it is advantageous for the terminal device to bypass non-multicast time slots or time-frequency resources to receive multicast data.
  • an embodiment of the present application provides a multicast communication method.
  • the method includes: an access network device sends multicast configuration information in an initial frequency domain resource, and the multicast configuration information includes a first frequency domain resource and a first At least one set of first configuration information corresponding to the frequency domain resource, where the first configuration information includes a multicast data cell identifier, and the multicast area corresponding to the multicast data cell identifier is used to multicast data within the first frequency domain resource;
  • the network access device sends the multicast data to the terminal device in the multicast area in the first frequency domain resource according to the first configuration information.
  • the access network device may also send multicast configuration information in other frequency domain resources, for example, the other frequency resources may be indicated through PBCH or SIB1 or other SIBs.
  • the multicast configuration information further includes second configuration information, and the second configuration information includes a search space of the multicast control channel and/or a set of control resources in the second frequency domain resource.
  • the access network device may also The second configuration information sends the first multicast control channel in the second frequency domain resource; the access network device specifically sends the terminal device in the multicast area in the first frequency domain resource according to the first configuration information and the first multicast control channel Send multicast data.
  • the first configuration information further includes a multicast wireless network temporary identifier RNTI corresponding to the multicast data cell identifier, and the cyclic redundancy check CRC information of the first multicast control channel is scrambled by the multicast RNTI.
  • RNTI multicast wireless network temporary identifier
  • the modulation symbol of the first multicast control channel is scrambled by the current cell identifier, and the current cell identifier is the cell identifier corresponding to the synchronization signal, and the synchronization signal is used to synchronize the terminal device with the access network device.
  • the modulation symbol of the first multicast control channel is scrambled by the multicast data cell identifier.
  • the first configuration information further includes a multicast control cell ID, which is independent of the multicast data cell ID and the cell ID corresponding to the synchronization signal, and the synchronization signal is used for the terminal device and the access network device
  • the signal for synchronization; the modulation symbol of the first multicast control channel is scrambled by the multicast control cell identifier.
  • the second frequency domain resource is the initial frequency domain resource or the first frequency domain resource, or the second frequency domain resource is included in the second configuration information.
  • the multicast area includes multiple cells.
  • the first configuration information further includes a cell list, and the cell list includes multiple cells.
  • At least two of the multiple cells send the same multicast data on the same time-frequency resource.
  • the multicast data cell identifier is independent of the cell identifier corresponding to the synchronization signal, and the synchronization signal is a signal used for synchronization between the terminal device and the access network device.
  • the first configuration information further includes multicast TDD slot type configuration information corresponding to the multicast data cell ID and/or multicast rate matching information corresponding to the multicast data cell ID.
  • the principle and beneficial effects of the access network device to solve the problem can be referred to the principles and beneficial effects of the first aspect or the possible implementation manners of the first aspect, and the repetition will not be repeated.
  • a terminal device which can execute the method in the first aspect or the possible implementation manner of the first aspect.
  • This function can be realized by hardware, and can also be realized by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the unit may be software and/or hardware.
  • an access network device that can execute the method in the second aspect or the possible implementation manner of the second aspect.
  • This function can be realized by hardware, and can also be realized by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the unit may be software and/or hardware.
  • a terminal device includes: a processor, a memory, and a communication interface; the processor, the communication interface, and the memory are connected; wherein, the communication interface may be a transceiver.
  • the communication interface is used to communicate with other network elements (such as access network equipment).
  • one or more programs are stored in the memory
  • the processor calls the programs stored in the memory to implement the above-mentioned first aspect or the solution in the possible implementation manner of the first aspect, and the terminal device solves the problem
  • an access network device includes: a processor, a memory, and a communication interface; the processor, the communication interface, and the memory are connected; wherein, the communication interface may be a transceiver.
  • the communication interface is used to communicate with other network elements (such as access network equipment).
  • one or more programs are stored in the memory
  • the processor calls the programs stored in the memory to implement the above second aspect or the solution in the second possible implementation manner, and the access network device solves the problem
  • a computer program product which when run on a computer, causes the computer to execute the above-mentioned first aspect, second aspect, possible implementation manner of the first aspect, or method in the possible implementation manner of the second aspect .
  • a chip product is provided, which is provided in a terminal device and executes the method in the first aspect or the possible implementation manner of the first aspect.
  • a chip product is provided, the chip product is provided in an access network device, and executes the method in the second aspect or the possible implementation manner of the second aspect.
  • a computer-readable storage medium in which instructions are stored in a computer-readable storage medium, which when executed on a computer, causes the computer to perform the first aspect, the second aspect, and the first aspect.
  • the method in the implementation manner or the possible implementation manner of the second aspect.
  • FIG. 1 is a schematic diagram of a system architecture provided by an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a multicast communication method according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of another multicast communication method according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a mobile device according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an access network device according to an embodiment of the present invention.
  • Embodiments of the present application provide a multicast communication method and related equipment, which can perform multicast communication.
  • FIG. 1 is a schematic diagram of a system architecture provided by an embodiment of the present application.
  • the system architecture includes at least one access network device and at least one terminal device.
  • Figure 1 takes the system architecture including three access network devices and nine terminal devices as an example.
  • the system architecture may also include two access network devices or more than three access network devices, and the system architecture may also include more than nine or less than nine terminal devices.
  • each access network device includes one or more cells.
  • access network device 1 includes cell 1 to cell 3
  • access network device 2 includes cell 4 to cell 6
  • access network device 3 includes cell 7 to cell 9.
  • one or two or more cells may be included under the access network device.
  • FIG. 1 takes three cells under each access network device as an example.
  • multiple cells may form a multicast area.
  • cell 1 to cell 3 may form a multicast area 1
  • access network device 1 may send multicast data to terminal devices in the multicast area 1.
  • cell 1 to cell 6 may form a multicast area 2, and access network device 1 and access network device 2 may send the same multicast data to terminal devices in the multicast area 2.
  • a multicast area includes only one cell, that is, multicast data with one cell as the granularity, when the terminal device switches to an adjacent cell, it may affect service continuity. And the range of a single cell is small, and the probability that multiple terminal devices enjoy the same content service is not high, and the gain is not obvious compared to unicast transmission.
  • the multicast area is composed of multiple cells, since the range of the multicast area is larger than that of a single cell, when the terminal device switches to an adjacent cell, it is beneficial to reduce the impact on service continuity. And because the multicast area is composed of multiple cells, there is a high probability that multiple terminal devices will enjoy the same content service in the multicast area, and the gain is more obvious than unicast transmission.
  • the access network device can dynamically divide the multicast area according to the service requirements of the cell, instead of statically planning the multicast area, which can flexibly divide the multicast area . For example, if cell 1 to cell 3 have service requirements for service 1, then the access network equipment may divide multicast area 1 for service 1, and the multicast area 1 includes cell 1 to cell 3, and access network equipment 1 may report to this group. The terminal device in the broadcast area 1 sends the multicast data of the service 1. If cell 1 to cell 6 have service requirements for service 2, then the access network equipment may divide multicast area 2 for service 2. Multicast area 2 includes cell 1 to cell 6, and access network equipment 1 and access network equipment 2 may Multicast data of service 2 is sent to the terminal device in the multicast area 2.
  • the multicast area when the multicast area includes multiple cells, at least two cells in the multicast area send the same multicast data on the same time-frequency resource.
  • the multicast area 1 includes cell 1 to cell 3, cell 1 and cell 2 send the same multicast data on the same time-frequency resource, or cell 2 and cell 3 send the same group on the same time-frequency resource.
  • SFN single-frequency network
  • the data can also be multicast with the cell as the granularity.
  • the access network device 1 sends the multicast data of service 1 to the terminal device in the cell 1.
  • the access network device 1 sends the multicast data of the service 2 to the terminal device in the cell 2.
  • the system architecture of the present application may be applied to a 5G NR (new radio) system or an air interface system newer than the 5G NR system, or the system architecture of the present application may also be applied to a universal mobile communication system (universal mobile telecommunications system) , UMTS), global mobile communication system (global system for mobile communications, GSM) or 802.11 series systems, etc., the embodiments of the present application are not limited.
  • 5G NR new radio
  • UMTS universal mobile communication system
  • GSM global mobile communication system
  • 802.11 series systems etc.
  • the above access network device can provide communication coverage for a specific geographic area, and can communicate with terminal devices located in the coverage area.
  • the access network device can support communication protocols of different standards, or can support different communications. mode.
  • the access network device may be an evolved base station (evolutional node B, eNB or eNodeB) in the LTE system, or a wireless network controller in a cloud radio access network (cloud radio access network, CRAN), or may be
  • the access network equipment in the 5G network such as gNB, may be a small station, a micro station, or a transmission reception point (TRP), a relay station, an access point, or a public land mobile network (public land, mobile network, PLMN) access network equipment, etc.
  • TRP transmission reception point
  • PLMN public land mobile network
  • the above terminal equipment may refer to access terminal, user equipment (UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile terminal, user terminal, terminal, wireless communication device, User agent or user device.
  • the access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital processing (personal digital assistant, PDA), or wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the Internet of Things, virtual reality devices, terminal devices in fifth generation (5G) networks, or Terminal equipment in the public land mobile network (PLMN) that will evolve in the future.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • FIG. 2 is a multicast communication method provided by an embodiment of the present application.
  • the multicast communication method includes the following steps 201 to 204, in which:
  • the access network device sends multicast configuration information in the initial frequency domain resource.
  • the access network device may also send a synchronization signal block, where the synchronization signal block includes a synchronization signal and a physical broadcast channel (physical broadcast channel, PBCH). Including initial frequency domain resources.
  • the terminal device may also detect the synchronization signal block and synchronize with the access network device according to the synchronization signal in the synchronization signal block.
  • the synchronization signal may be a single-level synchronization signal or a two-level synchronization signal.
  • the two-level synchronization signal may include a primary synchronization signal (Primary Synchronization Signal, PSS) and a secondary synchronization signal (Secondary Synchronization Signal, SSS).
  • the terminal device may also determine the current cell identity according to the synchronization signal. For example, if the synchronization signal includes PSS and SSS, the terminal device determines the current cell identity according to the sequence of the synchronization signal. After detecting the synchronization signal block, the terminal device can also determine the basic broadcast message of the cell according to the PBCH of the synchronization signal block, such as initial frequency resources, etc.; or read the system information block 1 (SIB1) according to the PBCH and then pass the SIB1 Obtain basic broadcast messages of the cell, such as initial frequency resources. After the access network device sends the synchronization signal block, step 201 may be performed, that is, the multicast configuration information is sent in the initial frequency domain resource.
  • SIB1 system information block 1
  • the terminal device may perform step 202, that is, receive the multicast configuration information from the access network device in the initial frequency domain resource.
  • the initial frequency domain resource may be an initial BWP. That is to say, the initial frequency domain resource may be acquired by the terminal device according to PBCH or SIB1.
  • the initial frequency domain resource may be the initial frequency domain resource where the synchronization signal is located.
  • the terminal device can receive the multicast configuration information in advance.
  • multicast configuration information is carried by broadcast information.
  • multicast configuration information may be carried by a certain system information block (SIB), or by a certain logical channel or a broadcast radio resource control (RRC) message.
  • SIB system information block
  • RRC broadcast radio resource control
  • the multicast configuration information includes a first frequency domain resource and at least one set of first configuration information corresponding to the first frequency domain resource
  • the first configuration information includes a multicast data cell identifier
  • the group corresponding to the multicast data cell identifier The broadcast area is used to multicast data in the first frequency domain resource.
  • the first frequency domain resource may be a bandwidth part (BWP).
  • the multicast configuration information may include one or more first frequency domain resources, and one first frequency domain resource corresponds to one or more sets of first configuration information.
  • the multicast data cell ID in the first configuration information corresponds one-to-one with the multicast area.
  • the multicast configuration information sent by the access network device 1 includes BWP1 and BWP2.
  • the multicast configuration information also includes the first configuration information 1 and the first configuration information 2 corresponding to BWP1, and the first configuration information corresponding to BWP2. ⁇ Configuration Information 3. That is, BWP1 corresponds to two sets of first configuration information, and BWP2 corresponds to a set of first configuration information.
  • the first configuration information 1 includes a multicast data cell identifier 1, which corresponds to a multicast area 1.
  • Multicast area 1 is used to send multicast data in BWP1, that is, access network device 1 sends multicast data to terminal devices in multicast area 1 in BWP1.
  • the first configuration information 2 includes a multicast data cell identifier 2, which corresponds to the multicast area 2.
  • the multicast area 2 is used to send multicast data in the BWP1, that is, the access network device 1 and the access network device 2 send the same multicast data to the terminal devices in the multicast area 2 in the BWP1.
  • both multicast area 1 and multicast area 2 are used to send multicast data in BWP1, but the multicast service data of multicast area 1 and multicast area 2 are different.
  • the first configuration information 3 includes a multicast data cell identifier 3, and the multicast data cell identifier 3 corresponds to the multicast area 3.
  • Multicast area 3 is used to send multicast data in BWP2, that is, access network device 1, access network device 2, and access network device 3 send the same multicast data to terminal devices in multicast area 3 in BWP2.
  • the multicast configuration information sent by the access network device 2 is shown in Table 2 below
  • the multicast configuration information sent by the access network device 3 is shown in Table 3 below.
  • the multicast configuration information includes BWP1 and BWP2, and the multicast configuration information further includes first configuration information 2 corresponding to BWP1 and first configuration information 3 corresponding to BWP2.
  • the multicast configuration information includes BWP2, and the multicast configuration information also includes first configuration information 3 corresponding to BWP2.
  • the multicast area corresponding to the multicast data cell identifier may include one or more cells.
  • the multicast area corresponding to the multicast data cell identifier includes multiple cells, at least two cells in the multicast area send the same multicast data on the same time-frequency resource.
  • the multicast area corresponding to the multicast data cell identifier is dynamically planned according to the business requirements of the cell.
  • the description of the multicast area corresponding to the multicast data cell ID please refer to the relevant description of the multicast area under the foregoing system architecture, which will not be repeated here.
  • the first configuration information further includes a cell list, and the cell list includes multiple cells in the multicast area.
  • the multicast data cell identifier 1 in Table 1 above corresponds to the multicast area 1, and the multicast area 1 includes cell 1 to cell 3.
  • the first configuration information 1 further includes a cell list 1, and the cell list 1 includes cell 1 to cell 3.
  • the multicast data cell identifier 2 in Table 1 above corresponds to the multicast area 2, and the multicast area 2 includes cell 1 to cell 6.
  • the first configuration information 2 further includes a cell list 2, and the cell list 2 includes cell 1 to cell 6.
  • the multicast data cell identifier 3 in Table 1 above corresponds to the multicast area 3, and the multicast area 3 includes cell 4 to cell 6.
  • the first configuration information 3 further includes a cell list 3, and the cell list 3 includes cell 4 to cell 6.
  • the inclusion of multiple cells in the multicast area in the cell list specifically means that the cell list includes cell identities of multiple cells in the multicast area.
  • the cell ID in the cell list is the cell ID corresponding to the synchronization signal.
  • the cell identifier corresponding to the synchronization signal refers to the cell identifier obtained by detecting the synchronization signal. Carrying the cell list in the first configuration information can improve the continuity and mobility of the multicast service.
  • the terminal device moves from cell 1 in the multicast area 1 to cell 2 in the multicast area 1, if it is known in advance from the cell list in the multicast configuration information that cell 2 also belongs to the multicast area 1, because If cell 1 and cell 2 send the same multicast data, the terminal device does not need to go through the entire reading process of the multicast configuration information again, and can directly receive the multicast data sent by cell 2. Therefore, by carrying the cell list in the first configuration information, the continuity and mobility of the multicast service can be improved.
  • the multicast data cell identifier is independent of the cell identifier corresponding to the synchronization signal
  • the synchronization signal is a signal used for synchronization between the terminal device and the access network device.
  • the cell identifier corresponding to the synchronization signal refers to the cell identifier obtained by detecting the synchronization signal.
  • the multicast data cell identifier 1 corresponds to the multicast area 1, and the multicast area 1 includes cell 1 to cell 3. It is assumed that the synchronization signal includes PSS and SSS.
  • the cell ID of cell 1 is the cell ID corresponding to synchronization signal 1, that is, the cell ID of cell 1 is determined according to PSS1+SSS1.
  • the cell ID of cell 2 is the cell ID corresponding to synchronization signal 2, that is, the cell ID of cell 1 is determined according to PSS2+SSS2.
  • the cell ID of cell 3 is the cell ID corresponding to synchronization signal 3, that is, the cell ID of cell 1 is determined according to PSS3+SSS3.
  • the multicast data cell ID 1 is configured independently from the cell IDs of cells 1 to 3, that is, the access network device needs to configure the multicast data cell ID 1 separately.
  • the multicast data cell identifier 1 configured separately by the access network device may be different from the cell identifier of cell 1 to cell 3, or the same as the cell identifier of a cell in cell 1 to cell 3, which is not limited in this embodiment of the present application.
  • the first configuration information further includes multicast time division duplex (TDD) time slot type configuration information corresponding to the multicast data cell ID and/or multicast rate matching information corresponding to the multicast data cell ID.
  • TDD time division duplex
  • the multicast rate matching information corresponding to the multicast data cell ID indicates the time-frequency resources that need to be bypassed when performing multicasting in the multicast area corresponding to the multicast data cell ID. Based on this optional embodiment, it is advantageous for the terminal device to bypass non-multicast time slots or time-frequency resources to receive multicast data.
  • the first configuration information 1 in Table 1 above also includes multicast TDD time slot type configuration information 1 and multicast rate matching information 1.
  • the first configuration information 2 also includes multicast TDD time slot type configuration information 2 and multicast rate matching information 2.
  • the first configuration information 3 also includes multicast TDD time slot type configuration information 3 and multicast rate matching information 3. Since the TDD time slot configuration of different cells may be independent, if each cell in the multicast area 1 needs to send the same multicast data on the same time-frequency resource, then the multicast TDD in the first configuration information 1
  • the slot type configuration information 1 may be an intersection or a part of a common direction in the TDD time slot configuration of each cell in the multicast area 1.
  • the TDD time slot of cell 1 is configured as bottom, bottom, top, and top
  • the TDD time slot of cell 2 is configured as bottom, bottom, bottom, and top
  • the TDD time slot of cell 3 is configured, bottom, bottom, top, and top.
  • the multicast TDD time slot type configuration information 1 can be lower and lower XX, that is, the first two are the common downlink time slots that can be used for multicast, the next X indicates other time slots that are not available for multicast, and the last one is the public It can be used for the uplink time slot of multicast.
  • the terminal device After receiving the multicast TDD time slot type configuration information 1, the terminal device can bypass the non-multicast time slot to receive multicast data according to the multicast TDD time slot type configuration information 1.
  • each cell needs to send a reference signal.
  • the time-frequency resources for sending reference signals may be different in each cell. For example, cell 1 sends reference signals on time-frequency resources 1, cell 2 sends reference signals on time-frequency resources 2, and cell 3 sends reference signals on time-frequency resources 3. Therefore, if each cell in multicast area 1 needs to send the same multicast data on the same time-frequency resource, cell 1 to cell 3 need to bypass time-frequency resource 1 to time-frequency resource 3 to send the same multicast data. Therefore, the multicast rate matching information 1 may indicate the time-frequency resource 1 to the time-frequency resource 3. After receiving the multicast rate matching information 1, the terminal device can bypass the non-multicast time-frequency resources to receive multicast data according to the multicast rate matching information 1.
  • the terminal device receives multicast configuration information from the access network device in the initial frequency domain resource.
  • the terminal device may receive the multicast configuration information in the initial frequency domain resource.
  • the access network device may also send multicast configuration information in other frequency domain resources, and the terminal device may also receive multicast configuration information from the other frequency resources, for example, the other frequency resource is PBCH or SIB1 or other SIB indications of.
  • the access network device sends multicast data to the terminal device in the multicast area in the first frequency domain resource according to the first configuration information.
  • the access network device sends the multicast data in the first frequency domain resource according to the first configuration information. Specifically, the access network device may first scramble the multicast data by the multicast data cell identifier in the first configuration information, that is, the physical downlink shared channel (physical downlinklink) by using the multicast data cell identifier in the first configuration information
  • the shared channels (PDSCH) are scrambled, and then the scrambled multicast data is sent in the first frequency domain resource.
  • the terminal device receives the multicast data sent by the access network device according to the first frequency domain resource and the first configuration information.
  • the terminal device receives the multicast data sent by the access network device according to the first frequency domain resource and the first configuration information. Specifically, after receiving the multicast data sent by the access network device in the first frequency domain resource, the terminal device descrambles the received multicast data by using the multicast data cell identifier in the first configuration information.
  • the access network device For example, take the access network device as the access network device 1, and the terminal device as the terminal device under cell 1 to cell 3 as an example.
  • the multicast configuration information sent by the access network device 1 is shown in Table 1 above. After the access network device 1 sends the multicast configuration information in the initial frequency domain resource, the access network device 1 scrambles the multicast data of the service 1 through the multicast data cell ID 1 and sends the multicast data to the cell in the multicast area 1 in BWP1. Terminal devices 1 to 3 send the scrambled multicast data of service 1.
  • the terminal devices under cell 1 to cell 3 after receiving the multicast configuration information sent by the access network device 1 in the initial frequency domain resources, the terminal devices under cell 1 to cell 3 receive the multicast data of service 1 on BWP1, and use the multicast data cell identifier 1 pair The multicast data of the received service 1 is descrambled.
  • the access network device 1 After the access network device 1 sends the multicast configuration information in the initial frequency domain resource, the access network device 1 scrambles the multicast data of the service 2 through the multicast data cell ID 2 and sends the multicast data to the multicast area in BWP1.
  • the terminal devices in cell 1 to cell 3 in 2 send the scrambled multicast data of service 2.
  • the terminal devices under cell 1 to cell 3 receive the multicast data of service 2 on BWP1, and pass the multicast data cell identifier 2 pair The multicast data of the received service 2 is descrambled.
  • the access network device 1 After the access network device 1 sends the multicast configuration information in the initial frequency domain resource, the access network device 1 scrambles the multicast data of the service 3 through the multicast data cell ID 3, and sends the multicast data to the multicast area in BWP2.
  • the terminal devices in cell 1 to cell 3 in 3 send the multicast data of the scrambled service 3.
  • the terminal devices under cell 1 to cell 3 receive the multicast data of service 3 at BWP2, and use the multicast data cell ID 3 pairs
  • the multicast data of the received service 3 is descrambled. The same applies to other access network equipment and terminal equipment, which will not be repeated here.
  • multicast communication can be performed between the access network device and the terminal device.
  • FIG. 3 is a multicast communication method provided by an embodiment of the present application.
  • the multicast communication method includes the following steps 301 to 306, in which:
  • the access network device sends multicast configuration information in the initial frequency domain resource.
  • the terminal device receives multicast configuration information from the access network device in the initial frequency domain resource.
  • the multicast configuration information includes a first frequency domain resource and at least one set of first configuration information corresponding to the first frequency domain resource, the first configuration information includes a multicast data cell identifier, and the multicast data cell identifier corresponds to the multicast
  • the area is used to multicast data within the first frequency domain resource.
  • the multicast configuration information further includes second configuration information
  • the second configuration information includes a search space of the multicast control channel and/or a set of control resources in the second frequency domain resource.
  • the multicast control channel may be a physical downlink control channel (physical downlink control channel, PDCCH).
  • the second frequency domain resource may be BWP.
  • the search space of the multicast control channel includes the monitoring period and offset of the multicast control channel. For example, the monitoring period included in the search space is 5 time slots, and the offset is 2 time slots. If the slot number starts from 0, the terminal device detects the multicast control channel in these slot 2, slot 7, ...
  • the control resource set of the multicast control channel includes the number of frequency domain subbands and time domain symbols occupied by the control channel in the second frequency domain resource.
  • control channel resource set includes a certain 12 resource blocks (resource blocks (RB)) and 2 consecutive time domain symbols in the second frequency domain resource. That is to say, in the embodiment of the present application, the PDSCH can be dynamically scheduled through the PDCCH, that is, the multicast data can be dynamically scheduled through the PDCCH.
  • resource blocks resource blocks (RB)
  • RB resource blocks
  • the access network device sends the first multicast control channel in the second frequency domain resource according to the second configuration information.
  • the access network device after the initial frequency domain resource sends the multicast configuration information, the access network device sends the first multicast control channel in the second frequency domain resource according to the second configuration information.
  • the terminal device detects the first multicast control channel in the second frequency domain resource according to the second configuration information.
  • the terminal device after receiving the multicast configuration information in the initial frequency domain resource, the terminal device detects the first multicast control channel in the second frequency domain resource according to the second configuration information.
  • the access network device sends multicast data to the terminal device in the multicast area according to the first configuration information and the first multicast control channel in the first frequency domain resource.
  • the access network device after the access network device sends the first multicast control channel in the second frequency domain resource according to the second configuration information, the access network device according to the first configuration information and the first multicast control channel is in the first Frequency domain resources send multicast data to terminal devices in the multicast area.
  • the terminal device receives the multicast data sent by the access network device in the first frequency domain resource according to the first configuration information and the first multicast control channel.
  • the terminal device after the terminal device detects the first multicast control channel in the second frequency domain resource according to the second configuration information, the terminal device according to the first configuration information and the first multicast control channel in the first frequency domain Receive multicast data sent by the access network device within the resource.
  • the multicast configuration information sent by the access network device 1 includes BWP1 and BWP2.
  • the multicast configuration information also includes the first configuration information 1 and the first configuration information 2 corresponding to BWP1, and the first configuration information corresponding to BWP2. ⁇ Configuration Information 3.
  • the first configuration information 1 includes a multicast data cell identifier 1, which corresponds to a multicast area 1.
  • the first configuration information 2 includes a multicast data cell identifier 2, which corresponds to the multicast area 2.
  • the first configuration information 3 includes a multicast data cell identifier 3, and the multicast data cell identifier 3 corresponds to the multicast area 3.
  • the multicast configuration information sent by the access network device 1 further includes second configuration information, and the second configuration information includes a search space of the multicast control channel and a control resource set within the second frequency domain resource.
  • the access network device 1 sends the multicast configuration information in the initial frequency domain resource, the access network device 1 sends the first multicast control channel 1 to the first multicast control channel 3 in the second frequency domain resource according to the second configuration information .
  • the first multicast control channel 1 is used to schedule the multicast area 1 to send multicast data on the physical resource block 1 (Physical Resource Block, PRB) in BWP1
  • the first multicast control channel 2 is used to schedule the multicast area 2 PRB2 in BWP1 sends multicast data
  • the first multicast control channel 3 is used to schedule the multicast area 3 to send multicast data in PRB3 in BWP2.
  • the terminal device After receiving the multicast configuration information sent by the access network device 1, the terminal device detects the first multicast control channel 1 to the first multicast control channel 3 in the second frequency domain resource according to the second configuration information.
  • the access network device 1 After sending the first multicast control channel 1 in the second frequency domain resource according to the second configuration information, the access network device 1 scrambles the multicast data of the service 1 through the multicast data cell ID 1, and the PRB1 sends the scrambled multicast data of service 1 to the terminal device in multicast area 1.
  • the terminal device PRB1 in BWP1 After detecting the first multicast control channel 1, the terminal device PRB1 in BWP1 receives the multicast data of service 1, and descrambling the multicast data of service 1 through the multicast data cell identifier 1.
  • the access network device sending multicast data according to the first multicast control channel 2 and the first multicast control channel 3, which will not be repeated here.
  • the access network device can dynamically schedule the multicast data.
  • the first configuration information further includes a multicast wireless network temporary identifier RNTI corresponding to the multicast data cell identifier, and the cyclic redundancy check (CRC) information of the first multicast control channel is determined by the multicast RNTI scrambling.
  • the terminal device uses the RNTI in the first configuration information to descramble the CRC information of the first multicast control channel, and then according to the first configuration information and the descrambled first group
  • the broadcast control channel receives the multicast data sent by the access network device in the first frequency domain resource.
  • the first configuration information 1 further includes RNTI1
  • the first configuration information 2 further includes RNTI2
  • the first configuration information 3 further includes RNTI3.
  • RNTI1 to RNTI3 may be the same or different, which is not limited in the embodiments of the present application.
  • the CRC information of the first multicast control channel 1 is scrambled by RNTI1.
  • the CRC information of the first multicast control channel 2 is scrambled by RNTI2.
  • the CRC information of the first multicast control channel 3 is scrambled by RNTI3.
  • the terminal device After detecting the first multicast control channel 1, the terminal device uses RNTI1 to descramble the CRC information of the first multicast control channel 1, and according to the first configuration information 1 and the descrambled first multicast control channel 1 in BWP1 To receive multicast data. After detecting the first multicast control channel 2, the terminal device uses RNTI2 to descramble the CRC information of the first multicast control channel 2, and according to the first configuration information 2 and the descrambled first multicast control channel 2 in BWP1 To receive multicast data.
  • the terminal device After detecting the first multicast control channel 3, the terminal device uses RNTI23 to descramble the CRC information of the first multicast control channel 3, and according to the first configuration information 3 and the descrambled first multicast control channel 3 in BWP2 To receive multicast data.
  • the terminal device may also detect the synchronization signal and determine the current cell identity according to the synchronization signal; where the modulation symbol of the first multicast control channel is scrambled by the current cell identity.
  • the terminal device uses the current cell identity determined according to the synchronization signal to descramble the modulation symbol of the first multicast control channel, and then uses the RNTI in the first configuration information to The CRC information of the multicast control channel is descrambled, and then according to the first configuration information and the descrambled first multicast control channel, the multicast data sent by the access network device is received in the first frequency domain resource.
  • the access network device is the access network device 1, and the terminal device is the terminal device in the cell 1 as an example.
  • the terminal device detects the synchronization signal, which includes PSS1 and SSS1.
  • the terminal device determines the current cell identity 1 according to the synchronization signal sequence.
  • the access network device 1 sends the multicast configuration information shown in Table 4 above in the initial frequency domain resource, the access network device scrambles the CRC information of the first multicast control channel 1 through RNTI1, and then according to the current cell ID 1
  • the modulation symbol of the first multicast control channel 1 is scrambled, and finally the scrambled first multicast control channel 1 is sent to the terminal device under the cell 1.
  • the terminal device under cell 1 After receiving the first multicast control channel 1, the terminal device under cell 1 first descrambles the modulation symbol of the first multicast control channel 1 through the current cell ID 1, and then the CRC of the first multicast control channel 1 through RNTI1 Information to descramble. Finally, the multicast data sent by the access network device 1 is received in the BWP1 according to the descrambled first multicast control channel 1 and the first configuration information 1.
  • the access network device may use the real cell identification of each cell (that is, the cell identification corresponding to the synchronization signal) to scramble the modulation symbol of the first multicast control channel, which is beneficial to the access network
  • the device independently sends the first multicast control channel to each cell, and does not use the multi-cell SFN mode to send the first multicast control channel.
  • the modulation symbol of the first multicast control channel is scrambled by the multicast data cell identifier.
  • the multicast configuration information sent by the access network device 1 is shown in Table 4 above.
  • the CRC information of the first multicast control channel 1 is scrambled by RNTI1, and the modulation symbol of the first multicast control channel 1 is scrambled.
  • the CRC information of the first multicast control channel 2 is scrambled by RNTI2, and the modulation symbol of the first multicast control channel 2 is scrambled by the multicast data cell identifier 2.
  • the CRC information of the first multicast control channel 2 is scrambled by RNTI2, and the modulation symbol of the first multicast control channel 2 is scrambled by the multicast data cell identifier 2.
  • the terminal device After detecting the first multicast control channel 1, the terminal device uses the multicast data cell ID 1 to descramble the modulation symbol of the first multicast control channel 1, and then uses RNTI1 to perform the CRC information of the first multicast control channel 1. Descramble. Finally, the multicast data sent by the access network device 1 is received in the BWP1 according to the descrambled first multicast control channel 1 and the first configuration information 1. After detecting the first multicast control channel 2 and the first multicast control channel 3, the terminal device is the same, and will not be repeated here.
  • the multicast data cell identifier is used to scramble the modulation symbol of the first multicast control channel, which may facilitate the access network device to send the first multicast control channel to each cell in an SFN manner to obtain The signal combining gain of SFN.
  • the first configuration information further includes a multicast control cell ID, which is independent of the multicast data cell ID and the cell ID corresponding to the synchronization signal, and the synchronization signal is used for the terminal device and the access network device
  • the signal for synchronization; the modulation symbol of the first multicast control channel is scrambled by the multicast control cell identifier.
  • the cell identifier corresponding to the synchronization signal refers to the cell identifier obtained by detecting the synchronization signal.
  • the first configuration information 1 further includes a multicast control cell identifier 1
  • the first configuration information 2 further includes a multicast control cell identifier 2.
  • a configuration information 3 includes the multicast control cell identity 3.
  • the multicast control cell ID 1 and the multicast data cell ID are independently configured, and the multicast control cell ID 1 and the cell ID corresponding to the synchronization signal are also independently configured.
  • the CRC information of the first multicast control channel 1 is scrambled by RNTI1, and the modulation symbol of the first multicast control channel 1 is scrambled by the multicast control cell identifier 1.
  • the CRC information of the first multicast control channel 2 is scrambled by RNTI2, and the modulation symbol of the first multicast control channel 2 is scrambled by the multicast control cell identifier 2.
  • the CRC information of the first multicast control channel 3 is scrambled by RNTI3, and the modulation symbol of the first multicast control channel 3 is scrambled by the multicast control cell identifier 3.
  • the terminal device After detecting the first multicast control channel 1, the terminal device uses the multicast control cell identifier 1 to descramble the modulation symbol of the first multicast control channel 1, and then uses RNTI1 to perform the CRC information of the first multicast control channel 1. Descramble. Finally, the multicast data sent by the access network device 1 is received in the BWP1 according to the descrambled first multicast control channel 1 and the first configuration information 1. After detecting the first multicast control channel 2 and the first multicast control channel 3, the terminal device is the same, and will not be repeated here.
  • the multicast control cell identifier is used to scramble the modulation symbol of the first multicast control channel, which can facilitate the access network device to send the first multicast control channel to each cell in the SFN manner to obtain The signal combining gain of SFN.
  • the second frequency domain resource is the initial frequency domain resource or the first frequency domain resource.
  • the second frequency domain resource is included in the second configuration information, that is, the second frequency domain resource, the initial frequency domain resource, and the first frequency domain resource are independently configured.
  • the embodiments of the present invention may divide the functional modules of the device according to the above method examples.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or software function modules. It should be noted that the division of the modules in the embodiment of the present invention is schematic, and is only a division of logical functions. In actual implementation, there may be another division manner.
  • the implementation of the present invention also provides a terminal device.
  • the terminal device includes: a communication module. among them:
  • the communication module is configured to receive multicast configuration information from the access network device in the initial frequency domain resource, the multicast configuration information includes the first frequency domain resource and at least one set of first configuration information corresponding to the first frequency domain resource, the first 1.
  • the configuration information includes a multicast data cell identifier, and the multicast area corresponding to the multicast data cell identifier is used to multicast data within the first frequency domain resource; the communication module is also used to determine the first frequency domain resource and the first configuration The information receives the multicast data sent by the access network device.
  • the multicast configuration information further includes second configuration information
  • the second configuration information includes a search space of the multicast control channel and/or a set of control resources in the second frequency domain resource
  • the communication module is also used to The second configuration information detects the first multicast control channel in the second frequency domain resource; the manner in which the communication module receives the multicast data sent by the access network device according to the first frequency domain resource and the first configuration information is specifically: according to the first The configuration information and the first multicast control channel receive multicast data sent by the access network device within the first frequency domain resource.
  • the first configuration information further includes a multicast wireless network temporary identifier RNTI corresponding to the multicast data cell identifier, and the cyclic redundancy check CRC information of the first multicast control channel is scrambled by the multicast RNTI.
  • RNTI multicast wireless network temporary identifier
  • the terminal device further includes a processing module, wherein: the communication module is also used to detect the synchronization signal; the processing module is used to determine the current cell identity according to the synchronization signal; the modulation symbol of the first multicast control channel is added by the current cell identity Disturb.
  • the modulation symbol of the first multicast control channel is scrambled by the multicast data cell identifier.
  • the first configuration information further includes a multicast control cell ID, which is independent of the multicast data cell ID and the cell ID corresponding to the synchronization signal, and the synchronization signal is used for the terminal device and the access network device
  • the signal for synchronization; the modulation symbol of the first multicast control channel is scrambled by the multicast control cell identifier.
  • the second frequency domain resource is the initial frequency domain resource or the first frequency domain resource, or the second frequency domain resource is included in the second configuration information.
  • the multicast area includes multiple cells.
  • the first configuration information further includes a cell list, and the cell list includes multiple cells.
  • At least two of the multiple cells send the same multicast data on the same time-frequency resource.
  • the multicast data cell identifier is independent of the cell identifier corresponding to the synchronization signal, and the synchronization signal is a signal used for synchronization between the terminal device and the access network device.
  • the first configuration information further includes multicast TDD slot type configuration information corresponding to the multicast data cell ID and/or multicast rate matching information corresponding to the multicast data cell ID.
  • the terminal device may implement part or all of the steps in the multicast communication method in the embodiments shown in FIG. 2 and FIG. 3 through the foregoing modules.
  • the embodiments of the present application are device embodiments corresponding to the method embodiments, and the description of the method embodiments is also applicable to the embodiments of the present application.
  • the implementation of the present invention also provides an access network device.
  • the access network device includes: a communication module. among them:
  • the communication module is configured to send multicast configuration information in the initial frequency domain resource, where the multicast configuration information includes the first frequency domain resource and at least one set of first configuration information corresponding to the first frequency domain resource, and the first configuration information includes the group Broadcast data cell ID, the multicast area corresponding to the multicast data cell ID is used to multicast data in the first frequency domain resource; the communication module is also used to send multicast data in the first frequency domain resource to the multicast area according to the first configuration information The terminal equipment within sends multicast data.
  • the multicast configuration information further includes second configuration information.
  • the second configuration information includes a search space of the multicast control channel and/or a set of control resources in the second frequency domain resource.
  • the communication module is also used to 2.
  • the configuration information sends the first multicast control channel in the second frequency domain resource; the method for the communication module to send the multicast data to the terminal device in the multicast area in the first frequency domain resource according to the first configuration information is specifically as follows: A configuration information and the first multicast control channel in the first frequency domain resource to send multicast data to the terminal device in the multicast area.
  • the first configuration information further includes a multicast wireless network temporary identifier RNTI corresponding to the multicast data cell identifier, and the cyclic redundancy check CRC information of the first multicast control channel is scrambled by the multicast RNTI.
  • RNTI multicast wireless network temporary identifier
  • the modulation symbol of the first multicast control channel is scrambled by the current cell ID, and the current cell ID is the cell ID corresponding to the synchronization signal, and the synchronization signal is used to synchronize the terminal device with the access network device.
  • the modulation symbol of the first multicast control channel is scrambled by the multicast data cell identifier.
  • the first configuration information further includes a multicast control cell ID, which is independent of the multicast data cell ID and the cell ID corresponding to the synchronization signal, and the synchronization signal is used for the terminal device and the access network device
  • the signal for synchronization; the modulation symbol of the first multicast control channel is scrambled by the multicast control cell identifier.
  • the second frequency domain resource is the initial frequency domain resource or the first frequency domain resource, or the second frequency domain resource is included in the second configuration information.
  • the multicast area includes multiple cells.
  • the first configuration information further includes a cell list, and the cell list includes multiple cells.
  • At least two of the multiple cells send the same multicast data on the same time-frequency resource.
  • the multicast data cell identifier is independent of the cell identifier corresponding to the synchronization signal, and the synchronization signal is a signal used for synchronization between the terminal device and the access network device.
  • the first configuration information further includes multicast TDD slot type configuration information corresponding to the multicast data cell ID and/or multicast rate matching information corresponding to the multicast data cell ID.
  • the access network device may implement part or all of the steps in the multicast communication method in the embodiments shown in FIG. 2 and FIG. 3 through the foregoing modules. It should be understood that the embodiments of the present application are device embodiments corresponding to the method embodiments, and the description of the method embodiments is also applicable to the embodiments of the present application.
  • FIG. 4 is a schematic structural diagram of a terminal device disclosed in an embodiment of the present application.
  • the terminal device 400 includes a processor 401, a memory 402 and a communication interface 403. Among them, the processor 401, the memory 402 and the communication interface 403 are connected.
  • the processor 401 may be a central processing unit (CPU), a general-purpose processor, a coprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC) , Field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • the processor 401 may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of DSP and microprocessor, and so on.
  • the communication interface 403 is used to implement communication with the access network device.
  • the processor 401 calls the program code stored in the memory 402 to execute the steps performed by the terminal device in the foregoing method embodiments.
  • the principle of the terminal equipment provided in the embodiments of the present application for solving problems is similar to the principle of the terminal equipment for solving the problems in the method embodiments of the present application. Therefore, the implementation of each device can refer to the implementation of the method. Repeat again.
  • FIG. 5 is a schematic structural diagram of an access network device disclosed in an embodiment of the present application.
  • the access network device 500 includes a processor 501, a memory 502 and a communication interface 503. Among them, the processor 501, the memory 502 and the communication interface 503 are connected.
  • the processor 501 may be a central processing unit (central processing unit, CPU), a general-purpose processor, a co-processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC) , Field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • the processor 501 may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of DSP and microprocessor, and so on.
  • the communication interface 503 is used to realize communication with the terminal device.
  • the processor 501 calls the program code stored in the memory 502 to perform the steps performed by the access network device in the above method embodiments.
  • the principle of the problem solved by the access network device provided in the embodiments of the present application is similar to the principle of the problem solved by the access network device of the method embodiment of the present application, so the implementation of each device can refer to the implementation of the method for a brief description , I won’t repeat them here.
  • Computer-readable media includes computer storage media and communication media, where communication media includes any medium that facilitates transfer of a computer program from one place to another.
  • the storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

Abstract

本发明实施例公开了一种组播通信方法和相关设备，该方法包括：终端设备在初始频域资源从接入网设备接收组播配置信息，该组播配置信息包括第一频域资源以及第一频域资源对应的至少一组第一配置信息，该第一配置信息包括组播数据小区标识，该组播数据小区标识对应的组播区域用于在第一频域资源内组播数据；终端设备根据第一频域资源和第一配置信息接收接入网设备发送的组播数据。基于本申请实施例所描述的方法，终端设备与接入网设备之间能够进行组播通信。

Description

一种组播通信方法及相关设备 技术领域
本发明涉及终端技术领域，尤其涉及一种组播通信方法及相关设备。
背景技术
LTE系统给终端设备提供了下行数据传输服务。下行数据传输大致可以分为两种：单播(Unicast)和组播(即广播多播)。单播主要是一种点对点的通信，即接入网设备(如基站)与终端设备之间的单点间通信。而组播通常是点到多点的通信，例如，同时有多个终端设备接收同样的业务。例如，视频会议、电视广播和视频点播就是典型的组播业务。
目前对组播通信的具体实现方式还在进一步讨论之中，因此接入网设备和终端设备之间如何进行组播通信，是目前亟待解决的问题。
发明内容
本发明实施例公开了一种组播通信方法及相关设备，能够进行组播通信。
第一方面，本申请实施例提供了一种组播通信方法，该方法包括：终端设备在初始频域资源从接入网设备接收组播配置信息，该组播配置信息包括第一频域资源以及第一频域资源对应的至少一组第一配置信息，该第一配置信息包括组播数据小区标识，该组播数据小区标识对应的组播区域用于在第一频域资源内组播数据；终端设备根据第一频域资源和第一配置信息接收接入网设备发送的组播数据。基于第一方面所描述的方法，终端设备与接入网设备之间能够进行组播通信。
可选的，终端设备也可以从该其他频率资源中接收组播配置信息，比如该其他频率资源可以通过PBCH或SIB1或其他SIB指示。
可选的，组播配置信息还包括第二配置信息，该第二配置信息包括组播控制信道的搜索空间和/或在第二频域资源内的控制资源集合，终端设备还可根据第二配置信息在第二频域资源内检测第一组播控制信道；终端设备具体根据第一配置信息和第一组播控制信道，在第一频域资源内接收接入网设备发送的组播数据。基于该可选的实施方式，接入网设备能够动态地对组播数据进行调度。
可选的，第一配置信息还包括与组播数据小区标识对应的组播无线网络临时标识RNTI，该第一组播控制信道的循环冗余校验CRC信息由组播RNTI加扰。基于该可选的实施方式，接入网设备能够对第一组播控制信道的CRC进行加扰。
可选的，终端设备还可检测同步信号，并根据同步信号确定当前小区标识；第一组播控制信道的调制符号由当前小区标识加扰。基于该可选的实施方式，接入网设备可以使用各个小区的真实小区标识(即同步信号对应的小区标识)来对第一组播控制信道的调制符号进行加扰，这样有利于接入网设备向各个小区独立发送第一组播控制信道，不采用多小区SFN方式发送第一组播控制信道。
可选的，第一组播控制信道的调制符号由组播数据小区标识加扰。基于该可选的实施方式，采用组播数据小区标识来加扰第一组播控制信道的调制符号，可利于接入网设备采 用SFN的方式向各个小区发送第一组播控制信道，以获得SFN的信号合并增益。
可选的，第一配置信息还包括组播控制小区标识，该组播控制小区标识独立于组播数据小区标识和同步信号对应的小区标识，该同步信号为用于终端设备与接入网设备进行同步的信号；第一组播控制信道的调制符号由组播控制小区标识加扰。基于该可选的实施方式，采用组播控制小区标识来加扰第一组播控制信道的调制符号，可利于接入网设备采用SFN的方式向各个小区发送第一组播控制信道，以获得SFN的信号合并增益。
可选的，第二频域资源为初始频域资源或第一频域资源，或者第二频域资源包括于第二配置信息中。
可选的，组播区域包括多个小区。如果组播区域由多个小区组成，由于组播区域的范围较单小区大，当终端设备切换到相邻小区时，有利于减小对业务的连续性造成影响。并且由于组播区域由多个小区组成，组播区域内发生多个终端设备享用相同内容的业务的概率较大，相比单播传输的增益更加明显。
可选的，第一配置信息还包括小区列表，该小区列表包括多个小区。通过在第一配置信息中携带小区列表可提高组播业务的连续性和移动性。
可选的，组播区域中的多个小区中的至少两个小区在相同的时频资源上发送相同的组播数据。这样有利于提高传输信号强度，提高频谱效率。
可选的，组播数据小区标识独立于同步信号对应的小区标识，该同步信号为用于终端设备与接入网设备进行同步的信号。通过独立配置组播数据小区标识，有利于接入网设备采用SFN方式发送组播数据，以获得SFN的信号合并增益。
可选的，第一配置信息还包括组播数据小区标识对应的组播TDD时隙类型配置信息和/或组播数据小区标识对应的组播速率匹配信息。基于该可选的实施方式，有利于终端设备绕开非组播的时隙或时频资源接收组播数据。
第二方面，本申请实施例提供了一种组播通信方法，该方法包括：接入网设备在初始频域资源发送组播配置信息，该组播配置信息包括第一频域资源以及第一频域资源对应的至少一组第一配置信息，该第一配置信息包括组播数据小区标识，该组播数据小区标识对应的组播区域用于在第一频域资源内组播数据；接入网设备根据第一配置信息在第一频域资源向组播区域内的终端设备发送组播数据。
可选的，接入网设备也可在其他频域资源发送组播配置信息，比如该其他频率资源可以通过PBCH或SIB1或其他SIB指示。
可选的，组播配置信息还包括第二配置信息，该第二配置信息包括组播控制信道的搜索空间和/或在第二频域资源内的控制资源集合，接入网设备还可根据第二配置信息在第二频域资源内发送第一组播控制信道；接入网设备具体根据第一配置信息和第一组播控制信道在第一频域资源向组播区域内的终端设备发送组播数据。
可选的，第一配置信息还包括与组播数据小区标识对应的组播无线网络临时标识RNTI，该第一组播控制信道的循环冗余校验CRC信息由组播RNTI加扰。
可选的，第一组播控制信道的调制符号由当前小区标识加扰，该当前小区标识为同步信号对应的小区标识，该同步信号用于终端设备与接入网设备进行同步。
可选的，第一组播控制信道的调制符号由组播数据小区标识加扰。
可选的，第一配置信息还包括组播控制小区标识，该组播控制小区标识独立于组播数据小区标识和同步信号对应的小区标识，该同步信号为用于终端设备与接入网设备进行同步的信号；第一组播控制信道的调制符号由组播控制小区标识加扰。
可选的，第二频域资源为初始频域资源或第一频域资源，或者第二频域资源包括于第二配置信息中。
可选的，组播区域包括多个小区。
可选的，第一配置信息还包括小区列表，小区列表包括多个小区。
可选的，多个小区中的至少两个小区在相同的时频资源上发送相同的组播数据。
可选的，组播数据小区标识独立于同步信号对应的小区标识，该同步信号为用于终端设备与接入网设备进行同步的信号。
可选的，第一配置信息还包括组播数据小区标识对应的组播TDD时隙类型配置信息和/或组播数据小区标识对应的组播速率匹配信息。
基于同一发明构思，该接入网设备解决问题的原理以及有益效果可以参见上述第一方面或第一方面可能的实现方式的原理以及有益效果，重复之处不再赘述。
第三方面，提供了一种终端设备，该终端设备可执行上述第一方面或第一方面可能的实现方式中的方法。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。该单元可以是软件和/或硬件。基于同一发明构思，该终端设备解决问题的原理以及有益效果可以参见上述第一方面或第一方面可能的实现方式的原理以及有益效果，重复之处不再赘述。
第四方面，提供了一种接入网设备，该接入网设备可执行上述第二方面或第二方面可能的实现方式中的方法。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。该单元可以是软件和/或硬件。基于同一发明构思，该接入网设备解决问题的原理以及有益效果可以参见上述第二方面或第二方面可能的实现方式的原理以及有益效果，重复之处不再赘述。
第五方面，提供了一种终端设备，该终端设备包括：处理器、存储器、通信接口；处理器、通信接口和存储器相连；其中，通信接口可以为收发器。通信接口用于实现与其他网元(如接入网设备)之间的通信。其中，一个或多个程序被存储在存储器中，该处理器调用存储在该存储器中的程序以实现上述第一方面或第一方面可能的实现方式中的方案，该终端设备解决问题的实施方式以及有益效果可以参见上述第一方面或第一方面可能的实现方式的原理以及有益效果，重复之处不再赘述。
第六方面，提供了一种接入网设备，该接入网设备包括：处理器、存储器、通信接口；处理器、通信接口和存储器相连；其中，通信接口可以为收发器。通信接口用于实现与其他网元(如接入网设备)之间的通信。其中，一个或多个程序被存储在存储器中，该处理器调用存储在该存储器中的程序以实现上述第二方面或第二方面可能的实现方式中的方案，该接入网设备解决问题的实施方式以及有益效果可以参见上述第二方面或第二方面可能的实现方式的原理以及有益效果，重复之处不再赘述。
第七方面，提供了一种计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面、第二方面、第一方面可能的实现方式或第二方面可能的实现方式中的方法。
第八方面，提供了一种芯片产品，该芯片产品设置在终端设备中，执行上述第一方面或第一方面可能的实现方式中的方法。
第九方面，提供了一种芯片产品，该芯片产品设置在接入网设备中，执行上述第二方面或第二方面可能的实现方式中的方法。
第十方面，提了供一种计算机可读存储介质，计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述第一方面、第二方面、第一方面可能的实现方式或第二方面可能的实现方式中的方法。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的一种系统架构的示意图；
图2是本发明实施例提供的一种组播通信方法的流程示意图；
图3是本发明实施例提供的另一种组播通信方法的流程示意图；
图4是本发明实施例提供的一种移动设备的结构示意图
图5是本发明实施例提供的一种接入网设备的结构示意图。
具体实施方式
为了使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明实施例的技术方案进行描述。
本申请实施例提供了一种组播通信方法及相关设备，能够进行组播通信。
为了能够更好地理解本申请实施例，下面对本申请实施例可应用的系统架构进行说明：
图1是本申请实施例提供的一种系统架构的示意图。如图1所示，该系统架构包括至少一个接入网设备、至少一个终端设备。图1以系统架构包括三个接入网设备和九个终端设备为例。当然，该系统架构中还可以包括两个接入网设备或三个以上的接入网设备，该系统架构中还可以包括九个以上或九个以下的终端设备。其中，每个接入网设备下包括一个或多个小区。如图1所示，接入网设备1下包括小区1～小区3，接入网设备2下包括小区4～小区6，接入网设备3下包括小区7～小区9。当然接入网设备下还可包括一个或两个或三个以上的小区，图1以每个接入网设备下包括三个小区为例。
可选的，多个小区可组成一个组播区域。例如，小区1～小区3可以组成一个组播区域1，接入网设备1可向该组播区域1中的终端设备发送组播数据。再如，小区1～小区6可以组成一个组播区域2，接入网设备1和接入网设备2可向该组播区域2中的终端设备发送相同的组播数据。如果一个组播区域只包括一个小区，即以一个小区为粒度组播数据，那么当终端设备切换到相邻小区时，可能会对业务的连续性造成影响。并且单小区的范围较小，发生多个终端设备享用相同内容的业务的概率不高，相比单播传输的增益不明显。如果组播区域由多个小区组成，由于组播区域的范围较单小区大，当终端设备切换到相邻小区时，有利于减小对业务的连续性造成影响。并且由于组播区域由多个小区组成，组播区域内发生多 个终端设备享用相同内容的业务的概率较大，相比单播传输的增益更加明显。
可选的，组播区域包括多个小区时，接入网设备可以根据小区的业务需求对组播区域进行动态地划分，而不是静态地规划的组播区域，这样可以灵活地划分组播区域。例如，小区1～小区3有业务1的业务需求，则接入网设备可为业务1划分组播区域1，该组播区域1包括小区1～小区3，接入网设备1可向该组播区域1中的终端设备发送业务1的组播数据。小区1～小区6有业务2的业务需求，则接入网设备可为业务2划分组播区域2，组播区域2包括小区1～小区6，接入网设备1和接入网设备2可向该组播区域2中的终端设备发送业务2的组播数据。
可选的，组播区域包括多个小区时，组播区域中至少两个小区在相同的时频资源上发送相同的组播数据。例如，组播区域1包括小区1～小区3，则小区1和小区2在相同的时频资源上发送相同的组播数据，或小区2和小区3在相同的时频资源上发送相同的组播数据，或小区1和小区3在相同的时频资源上发送相同的组播数据，或小区1、小区2和小区3在相同的时频资源上发送相同的组播数据。也就是说采用单频网(single frequency network，SFN)的方式发送组播数据。这样有利于提高传输信号强度，提高频谱效率。
可选的，也可以以小区为粒度组播数据。例如，接入网设备1向小区1中的终端设备发送业务1的组播数据。接入网设备1向小区2中的终端设备发送业务2的组播数据。
可选的，本申请的系统架构可应用于5G NR(new radio)系统或比5G NR系统新的空口系统中，或者，本申请的系统架构也可应用于通用移动通信系统(universal mobile telecommunications system，UMTS)、全球移动通讯系统(global system for mobile communications phone，GSM)或802.11系列的系统等等，本申请实施例不做限定。
其中，上述接入网设备可以为特定的地理区域提供通信覆盖，并且可以与位于所述覆盖区域内的终端设备进行通信，接入网设备可以支持不同制式的通信协议，或者可以支持不同的通信模式。例如，接入网设备可以是LTE系统中的演进型基站(evolutional node B，eNB或eNodeB)，或者是云无线接入网络(cloud radio access network，CRAN)中的无线网络控制器，或者可以为5G网络中的接入网设备，如gNB，或者可以为小站、微站或者传输接收点(transmission reception point，TRP)，还可以是中继站、接入点或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的接入网设备等。
其中，上述终端设备可以指接入终端、用户设备(user equipment，UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动终端、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话发起协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、物联网中的终端设备、虚拟现实设备、第五代(fifth generation，5G)网络中的终端设备或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的终端设备等。
下面进一步对本申请所提供的组播通信方法及相关设备进行介绍。
请参见图2，图2是本申请实施例提供的一种组播通信方法。如图2所示，该组播通信方法包括如下步骤201～步骤204，其中：
201、接入网设备在初始频域资源发送组播配置信息。
可选的，接入网设备在初始频域资源发送组播配置信息之前，还可发送同步信号块，该同步信号块中包括同步信号和物理广播信道(physical broadcast channel，PBCH)，该PBCH中包括初始频域资源。终端设备还可检测该同步信号块，并根据该同步信号块中的同步信号与接入网设备进行同步。其中，该同步信号可以是单级同步信号或两级同步信号。例如，两级同步信号可包括主同步信号(Primary Synchronization Signal，PSS)和辅同步信号(secondary synchronization signal，SSS)。可选的，终端设备还可根据该同步信号确定当前小区标识。例如，如果同步信号包括PSS和SSS，则终端设备根据该同步信号的序列确定的当前小区标识。终端设备检测到该同步信号块之后，还可根据该同步信号块的PBCH确定该小区的基本广播消息，比如初始频率资源等；或者根据PBCH读取系统信息块1(SIB1)，然后通过该SIB1获取该小区的基本广播消息，比如初始频率资源等。接入网设备发送同步信号块之后，可执行步骤201，即在初始频域资源发送组播配置信息。相应地，终端设备读取初始频率资源之后，可执行步骤202，即在初始频域资源从接入网设备接收组播配置信息。可选的，该初始频域资源可以为初始BWP。也就是说，初始频域资源可以是终端设备根据PBCH或SIB1来获取的。
可选的，该初始频域资源可以为同步信号所在的初始频域资源。这样终端设备就可以提前接收组播配置信息。
可选的，组播配置信息由广播信息承载。例如，组播配置信息可由某个系统信息块(system information block，SIB)承载，或由某个逻辑信道或某个广播的无线资源控制(radio resource control，RRC)消息承载。
其中，该组播配置信息包括第一频域资源以及第一频域资源对应的至少一组第一配置信息，该第一配置信息包括组播数据小区标识，该组播数据小区标识对应的组播区域用于在第一频域资源内组播数据。可选的，第一频域资源可以为带宽部分(bandwidth part，BWP)。可选的，组播配置信息可包括一个或多个第一频域资源，一个第一频域资源对应一组或多组第一配置信息。第一配置信息中的组播数据小区标识与组播区域一一对应。
举例来说，如果存在3个组播区域，分别为组播区域1～组播区域3。组播区域1包括小区1～小区3。组播区域2包括小区1～小区6。组播区域3包括小区1～小区9。如下表1所示，接入网设备1发送的组播配置信息包括BWP1和BWP2，组播配置信息还包括与BWP1对应的第一配置信息1和第一配置信息2，以及与BWP2对应的第一配置信息3。即BWP1对应两组第一配置信息，BWP2对应一组第一配置信息。其中，第一配置信息1包括组播数据小区标识1，该组播数据小区标识1对应组播区域1。组播区域1用于在BWP1内发送组播数据，即接入网设备1在BWP1内向组播区域1中的终端设备发送组播数据。第一配置信息2包括组播数据小区标识2，该组播数据小区标识2对应组播区域2。该组播区域2用于在BWP1内发送组播数据，即接入网设备1和接入网设备2在BWP1内向组播区域2中的终端设备发送相同的组播数据。也就是说，组播区域1和组播区域2都用于在BWP1内发送组播数据，只是组播区域1和组播区域2组播的业务数据不同。第一配置信息3包括组播数据小区标识3，组播数据小区标识3对应组播区域3。组播区域3用于在BWP2内发送组播数据，即接入网设备1、接入网设备2和接入网设备3在BWP2内向组播区域3中的终端设备发送相同的组播数据。同理，接入网设 备2发送的组播配置信息如下表2所示，接入网设备3发送的组播配置信息如下表3所示。如下表2所示，组播配置信息包括BWP1和BWP2，组播配置信息还包括与BWP1对应的第一配置信息2，以及与BWP2对应的第一配置信息3。如下表3所示，组播配置信息包括BWP2，组播配置信息还包括与BWP2对应的第一配置信息3。
表1
Figure PCTCN2018121791-appb-000001
表2
Figure PCTCN2018121791-appb-000002
表3
Figure PCTCN2018121791-appb-000003
可选的，组播数据小区标识对应的组播区域可包括一个或多个小区。可选的，组播数据小区标识对应的组播区域包括多个小区时，该组播区域中至少两个小区在相同的时频资源上发送相同的组播数据。可选的，组播数据小区标识对应的组播区域是根据小区的业务需求动态规划的。关于组播数据小区标识对应的组播区域的描述具体可参见前述系统架构下对组播区域的相关描述，在此不赘述。
可选的，当组播数据小区标识对应的组播区域包括多个小区时，该第一配置信息还包括小区列表，该小区列表中包括该组播区域中的多个小区。
例如，上表1中组播数据小区标识1对应组播区域1，该组播区域1包括小区1～小区3。那么，第一配置信息1中还包括小区列表1，该小区列表1中包括小区1～小区3。同理，上表1中组播数据小区标识2对应组播区域2，该组播区域2包括小区1～小区6。那么，第一配置信息2中还包括小区列表2，该小区列表2中包括小区1～小区6。上表1中组播数据小区标识3对应组播区域3，该组播区域3包括小区4～小区6。那么，第一配置信息3中还包括小区列表3，该小区列表3中包括小区4～小区6。表2和表3同理，在此不赘述。具体地，小区列表中包括组播区域中的多个小区具体是指小区列表包括组播区域中的多个小区的小区标识。该小区列表中的小区标识为同步信号对应的小区标识。同步信号对应的小区标识是指通过检测同步信号获取到的小区标识。在第一配置信息中携带小区列表可提高组播业务的连续性和移动性。例如，当终端设备从组播区域1中的小区1移动到组播区域1中的小区2下时，如果事先通过组播配置信息中的小区列表获知小区2也属于组播区域1下，由于小区1和小区2发送 相同的组播数据，那么终端设备不需要重新走一遍上述组播配置信息的整个读取流程，可以直接接收小区2发送的组播数据。因此，通过在第一配置信息中携带小区列表可提高组播业务的连续性和移动性。
可选的，组播数据小区标识独立于同步信号对应的小区标识，该同步信号为用于终端设备与接入网设备进行同步的信号。其中，同步信号对应的小区标识是指通过检测同步信号获取到的小区标识。例如，组播数据小区标识1对应组播区域1，组播区域1包括小区1～小区3。假设同步信号包括PSS和SSS。小区1的小区标识为同步信号1对应的小区标识，即小区1的小区标识根据PSS1+SSS1确定。小区2的小区标识为同步信号2对应的小区标识，即小区1的小区标识根据PSS2+SSS2确定。小区3的小区标识为同步信号3对应的小区标识，即小区1的小区标识根据PSS3+SSS3确定。其中，组播数据小区标识1是与小区1～小区3的小区标识独立配置的，即接入网设备需要单独配置组播数据小区标识1。接入网设备单独配置的组播数据小区标识1可以与小区1～小区3的小区标识不同，或者与小区1～小区3中的某个小区的小区标识相同，本申请实施例不做限定。通过独立配置组播数据小区标识，有利于接入网设备采用SFN方式发送组播数据，以获得SFN的信号合并增益。
可选的，第一配置信息还包括组播数据小区标识对应的组播时分双工(time division duplexing，TDD)时隙类型配置信息和/或组播数据小区标识对应的组播速率匹配信息。其中，组播数据小区标识对应的组播速率匹配信息指示组播数据小区标识对应的组播区域进行组播时需要绕开的时频资源。基于该可选的实施方式，有利于终端设备绕开非组播的时隙或时频资源接收组播数据。
例如，上表1中第一配置信息1还包括组播TDD时隙类型配置信息1和组播速率匹配信息1。第一配置信息2还包括组播TDD时隙类型配置信息2和组播速率匹配信息2。第一配置信息3还包括组播TDD时隙类型配置信息3和组播速率匹配信息3。由于不同小区的TDD时隙配置可能是独立的，如果组播区域1中的每个小区需要在相同的时频资源上发送相同的组播数据，那么第一配置信息1中的组播TDD时隙类型配置信息1可以为组播区域1中每个小区各自的TDD时隙配置中的一个共同方向的交集或交集中的一部分。例如，小区1的TDD时隙配置为下下下上上，小区2的TDD时隙配置为下下下下上，小区3的TDD时隙配置为下下上上上。那么，组播TDD时隙类型配置信息1可以为下下XX上，即前两个是公共可用于组播的下行时隙，后面X表示其他不可用于组播的时隙，最后一个是公共可用于组播的上行时隙。终端设备接收组播TDD时隙类型配置信息1之后，就可根据组播TDD时隙类型配置信息1绕开非组播的时隙接收组播数据。
同理，每个小区需要发送参考信号。各个小区发送参考信号的时频资源可能不同。例如，小区1在时频资源1发送参考信号，小区2在时频资源2发送参考信号，小区3在时频资源3发送参考信号。因此，如果组播区域1中的每个小区需要在相同的时频资源上发送相同的组播数据，则小区1～小区3需要绕开时频资源1～时频资源3发送相同的组播数据。因此，组播速率匹配信息1可以指示时频资源1～时频资源3。终端设备接收组播速率匹配信息1之后，就可根据组播速率匹配信息1绕开非组播的时频资源接收组播数据。
202、终端设备在初始频域资源从接入网设备接收组播配置信息。
本申请实施例中，接入网设备在初始频域资源发送组播配置信息之后，终端设备可在 初始频域资源接收该组播配置信息。
可选的，接入网设备也可在其他频域资源发送组播配置信息，终端设备也可以从该其他频率资源中接收组播配置信息，比如该其他频率资源为PBCH或SIB1或其他SIB指示的。
203、接入网设备根据第一配置信息在第一频域资源向组播区域中的终端设备发送组播数据。
本申请实施例中，接入网设备在初始频域资源发送组播配置信息之后，根据第一配置信息在第一频域资源发送组播数据。具体地，接入网设备可先通过第一配置信息中的组播数据小区标识对组播数据进行加扰，即通过第一配置信息中的组播数据小区标识对物理下行共享信道(physical downlink shared channel，PDSCH)进行加扰，再在第一频域资源发送加扰后的组播数据。
204、终端设备根据第一频域资源和第一配置信息接收接入网设备发送的组播数据。
本申请实施例中，终端设备在初始频域资源从接入网设备接收组播配置信息之后，根据第一频域资源和第一配置信息接收接入网设备发送的组播数据。具体地，终端设备在第一频域资源接收接入网设备发送的组播数据之后，通过第一配置信息中的组播数据小区标识对接收的组播数据进行解扰。
举例来说，以接入网设备为接入网设备1，终端设备为小区1～小区3下的终端设备为例。接入网设备1发送的组播配置信息如上表1所示。接入网设备1在初始频域资源发送组播配置信息之后，接入网设备1通过组播数据小区标识1对业务1的组播数据进行加扰，并在BWP1向组播区域1中小区1～小区3的终端设备发送加扰后的业务1的组播数据。相应地，小区1～小区3下的终端设备在初始频域资源接收接入网设备1发送的组播配置信息之后，在BWP1接收业务1的组播数据，并通过组播数据小区标识1对接收的业务1的组播数据进行解扰。
同理，接入网设备1在初始频域资源发送组播配置信息之后，接入网设备1通过组播数据小区标识2对业务2的组播数据进行加扰，并在BWP1向组播区域2中小区1～小区3的终端设备发送加扰后的业务2的组播数据。相应地，小区1～小区3下的终端设备在初始频域资源接收接入网设备1发送的组播配置信息之后，在BWP1接收业务2的组播数据，并通过组播数据小区标识2对接收的业务2的组播数据进行解扰。
同理，接入网设备1在初始频域资源发送组播配置信息之后，接入网设备1通过组播数据小区标识3对业务3的组播数据进行加扰，并在BWP2向组播区域3中小区1～小区3的终端设备发送加扰后的业务3的组播数据。相应地，小区1～小区3下的终端设备在初始频域资源接收接入网设备1发送的组播配置信息之后，在BWP2接收业务3的组播数据，并通过组播数据小区标识3对接收的业务3的组播数据进行解扰。其他接入网设备和终端设备同理，在此不赘述。
可见，通过实施图2所描述的方法，接入网设备与终端设备之间能够进行组播通信。
请参见图3，图3是本申请实施例提供的一种组播通信方法。如图3所示，该组播通信方法包括如下步骤301～步骤306，其中：
301、接入网设备在初始频域资源发送组播配置信息。
302、终端设备在初始频域资源从接入网设备接收组播配置信息。
其中，组播配置信息包括第一频域资源以及第一频域资源对应的至少一组第一配置信息，该第一配置信息包括组播数据小区标识，该组播数据小区标识对应的组播区域用于在第一频域资源内组播数据。关于步骤301和步骤302的具体实施方式与上述步骤201和步骤202的具体实施方式相同，在此不赘述。
值得一提的是，组播配置信息还包括第二配置信息，该第二配置信息包括组播控制信道的搜索空间和/或在第二频域资源内的控制资源集合。其中，组播控制信道可以为物理下行控制信道(physical downlink control channel，PDCCH)。第二频域资源可以为BWP。组播控制信道的搜索空间包括组播控制信道的监测周期以及偏移量。例如，搜索空间包括的监测周期为5个时隙，偏移量为2个时隙。如果时隙编号从0开始，则终端设备在时隙2，时隙7，...的这些时隙检测组播控制信道。组播控制信道的控制资源集合包括控制信道在第二频域资源中所占用的频域子带和时域的符号个数。例如，控制信道资源集合包括在第二频域资源中的某12个资源块(resource block，RB)和2个连续的时域符号。也就是说，本申请实施例中，可以通过PDCCH来动态地调度PDSCH，即可以通过PDCCH来动态地调度组播数据。
303、接入网设备根据第二配置信息在第二频域资源内发送第一组播控制信道。
本申请实施例中，接入网设备在初始频域资源发送组播配置信息之后，根据第二配置信息在第二频域资源内发送第一组播控制信道。
304、终端设备根据第二配置信息在第二频域资源内检测第一组播控制信道。
本申请实施例中，终端设备在初始频域资源接收组播配置信息之后，根据第二配置信息在第二频域资源内检测第一组播控制信道。
305、接入网设备根据第一配置信息和第一组播控制信道在第一频域资源向组播区域内的终端设备发送组播数据。
本申请实施例中，接入网设备根据第二配置信息在第二频域资源内发送第一组播控制信道之后，接入网设备根据第一配置信息和第一组播控制信道在第一频域资源向组播区域内的终端设备发送组播数据。
306、终端设备根据第一配置信息和第一组播控制信道，在第一频域资源内接收接入网设备发送的组播数据。
本申请实施例中，终端设备根据第二配置信息在第二频域资源内检测到第一组播控制信道之后，终端设备根据第一配置信息和第一组播控制信道，在第一频域资源内接收接入网设备发送的组播数据。
举例来说，以接入网设备为接入网设备1，终端设备为小区1～小区3下的终端设备为例。如上表1所示，接入网设备1发送的组播配置信息包括BWP1和BWP2，组播配置信息还包括与BWP1对应的第一配置信息1和第一配置信息2，以及与BWP2对应的第一配置信息3。其中，第一配置信息1包括组播数据小区标识1，该组播数据小区标识1对应组播区域1。第一配置信息2包括组播数据小区标识2，该组播数据小区标识2对应组播区域2。第一配置信息3包括组播数据小区标识3，组播数据小区标识3对应组播区域3。接入网设备1发送的组播配置信息还包括第二配置信息，该第二配置信息包括组播控制信道的搜索空间和在第二频域资源内的控制资源集合。接入网设备1在初始频域资源发送组播配置信息之后，接入网设备 1根据第二配置信息在第二频域资源内发送第一组播控制信道1～第一组播控制信道3。其中，第一组播控制信道1用于调度组播区域1在BWP1中的物理资源块1(Physical Resource Block，PRB)上发送组播数据，第一组播控制信道2用于调度组播区域2在BWP1中的PRB2发送组播数据，第一组播控制信道3用于调度组播区域3在BWP2中的PRB3发送组播数据。终端设备接收接入网设备1发送的组播配置信息之后，根据第二配置信息在第二频域资源内检测第一组播控制信道1～第一组播控制信道3。接入网设备1根据第二配置信息在第二频域资源内发送第一组播控制信道1之后，通过组播数据小区标识1对业务1的组播数据进行加扰，并在BWP1中的PRB1向组播区域1中的终端设备发送加扰后的业务1的组播数据。相应地，终端设备检测到第一组播播控制信道1之后，在BWP1中的PRB1接收业务1的组播数据，并通过组播数据小区标识1对业务1的组播数据进行解扰。接入网设备根据第一组播控制信道2和第一组播控制信道3发送组播数据同理，在此不再赘述。
可见，通过实施图3所描述的方法，接入网设备能够动态地对组播数据进行调度。
可选的，第一配置信息还包括与组播数据小区标识对应的组播无线网络临时标识RNTI，该第一组播控制信道的循环冗余校验(cyclic redundancy check，CRC)信息由组播RNTI加扰。可选的，终端设备检测到第一组播控制信道之后，使用第一配置信息中RNTI对第一组播控制信道的CRC信息进行解扰，再根据第一配置信息和解扰后的第一组播控制信道，在第一频域资源内接收接入网设备发送的组播数据。
例如，如下表4所示，接入网设备1发送的组播配置信息中，第一配置信息1还包括RNTI1，第一配置信息2还包括RNTI2，第一配置信息3还包括RNTI3。其中，RNTI1～RNTI3可以相同或不同，本申请实施例不做限定。其中，上述第一组播控制信道1的CRC信息通过RNTI1加扰。上述第一组播控制信道2的CRC信息通过RNTI2加扰。上述第一组播控制信道3的CRC信息通过RNTI3加扰。终端设备检测到第一组播控制信道1之后，使用RNTI1对第一组播控制信道1的CRC信息进行解扰，并根据第一配置信息1和解扰后的第一组播控制信道1在BWP1中接收组播数据。终端设备检测到第一组播控制信道2之后，使用RNTI2对第一组播控制信道2的CRC信息进行解扰，并根据第一配置信息2和解扰后的第一组播控制信道2在BWP1中接收组播数据。终端设备检测到第一组播控制信道3之后，使用RNTI23对第一组播控制信道3的CRC信息进行解扰，并根据第一配置信息3和解扰后的第一组播控制信道3在BWP2中接收组播数据。
表4
Figure PCTCN2018121791-appb-000004
可选的，终端设备还可检测同步信号，并根据同步信号确定当前小区标识；其中，第 一组播控制信道的调制符号由该当前小区标识加扰。可选的，终端设备检测到第一组播控制信道之后，使用根据同步信号确定的当前小区标识对第一组播控制信道的调制符号进行解扰，再使用第一配置信息中RNTI对第一组播控制信道的CRC信息进行解扰，再根据第一配置信息和解扰后的第一组播控制信道，在第一频域资源内接收接入网设备发送的组播数据。
例如，以接入网设备为接入网设备1，终端设备以小区1下的终端设备为例。终端设备检测同步信号，该同步信号包括PSS1和SSS1。终端设备根据该同步信号的序列确定当前小区标识1。接入网设备1在初始频域资源发送如上表4所示的组播配置信息之后，接入网设备通过RNTI1对第一组播控制信道1的CRC信息进行加扰，然后根据当前小区标识1对第一组播控制信道1的调制符号进行加扰，最后将经过加扰的第一组播控制信道1发送至小区1下的终端设备。小区1下的终端设备接收第一组播控制信道1之后，先通过当前小区标识1对第一组播控制信道1的调制符号进行解扰，再通过RNTI1对第一组播控制信道1的CRC信息进行解扰。最后根据解扰后的第一组播控制信道1和第一配置信息1在BWP1内接收接入网设备1发送的组播数据。在该可选的方式中，接入网设备可以使用各个小区的真实小区标识(即同步信号对应的小区标识)来对第一组播控制信道的调制符号进行加扰，这样有利于接入网设备向各个小区独立发送第一组播控制信道，不采用多小区SFN方式发送第一组播控制信道。
可选的，第一组播控制信道的调制符号由组播数据小区标识加扰。例如，接入网设备1发送的组播配置信息如上表4所示。其中，第一组播控制信道1的CRC信息由RNTI1进行加扰，第一组播控制信道1的调制符号进行加扰。第一组播控制信道2的CRC信息由RNTI2进行加扰，第一组播控制信道2的调制符号通过组播数据小区标识2加扰。第一组播控制信道2的CRC信息由RNTI2进行加扰，第一组播控制信道2的调制符号通过组播数据小区标识2加扰。终端设备检测到第一组播控制信道1之后，使用组播数据小区标识1对第一组播控制信道1的调制符号进行解扰，再使用RNTI1对第一组播控制信道1的CRC信息进行解扰。最后根据解扰后的第一组播控制信道1和第一配置信息1在BWP1内接收接入网设备1发送的组播数据。终端设备检测到第一组播控制信道2和第一组播控制信道3之后同理，在此不赘述。在该可选的方式中，采用组播数据小区标识来加扰第一组播控制信道的调制符号，可利于接入网设备采用SFN的方式向各个小区发送第一组播控制信道，以获得SFN的信号合并增益。
可选的，第一配置信息还包括组播控制小区标识，该组播控制小区标识独立于组播数据小区标识和同步信号对应的小区标识，该同步信号为用于终端设备与接入网设备进行同步的信号；第一组播控制信道的调制符号由组播控制小区标识加扰。其中，同步信号对应的小区标识是指通过检测同步信号获取到的小区标识。
例如，如下表5所示，接入网设备1发送的组播配置信息中，第一配置信息1还包括组播控制小区标识1，第一配置信息2还包括组播控制小区标识2，第一配置信息3包括组播控制小区标识3。组播控制小区标识1与组播数据小区标识是独立配置的，组播控制小区标识1与同步信号对应的小区标识也是独立配置的。
其中，第一组播控制信道1的CRC信息由RNTI1进行加扰，第一组播控制信道1的调制 符号通过组播控制小区标识1加扰。第一组播控制信道2的CRC信息由RNTI2进行加扰，第一组播控制信道2的调制符号通过组播控制小区标识2加扰。第一组播控制信道3的CRC信息由RNTI3进行加扰，第一组播控制信道3的调制符号通过组播控制小区标识3加扰。终端设备检测到第一组播控制信道1之后，使用组播控制小区标识1对第一组播控制信道1的调制符号进行解扰，再使用RNTI1对第一组播控制信道1的CRC信息进行解扰。最后根据解扰后的第一组播控制信道1和第一配置信息1在BWP1内接收接入网设备1发送的组播数据。终端设备检测到第一组播控制信道2和第一组播控制信道3之后同理，在此不赘述。在该可选的方式中，采用组播控制小区标识来加扰第一组播控制信道的调制符号，可利于接入网设备采用SFN的方式向各个小区发送第一组播控制信道，以获得SFN的信号合并增益。
表5
Figure PCTCN2018121791-appb-000005
可选的，第二频域资源为初始频域资源或第一频域资源。或者第二频域资源包括于第二配置信息中，即第二频域资源、初始频域资源和第一频域资源是独立配置的。
本发明实施例可以根据上述方法示例对设备进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本发明实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
本发明实施还提供了一种终端设备。该终端设备包括：通信模块。其中：
通信模块，用于在初始频域资源从接入网设备接收组播配置信息，该组播配置信息包括第一频域资源以及第一频域资源对应的至少一组第一配置信息，该第一配置信息包括组播数据小区标识，该组播数据小区标识对应的组播区域用于在第一频域资源内组播数据；通信模块，还用于根据第一频域资源和第一配置信息接收接入网设备发送的组播数据。
可选的，组播配置信息还包括第二配置信息，该第二配置信息包括组播控制信道的搜索空间和/或在第二频域资源内的控制资源集合，通信模块，还用于根据第二配置信息在第二频域资源内检测第一组播控制信道；通信模块根据第一频域资源和第一配置信息接收接入网设备发送的组播数据的方式具体为：根据第一配置信息和第一组播控制信道，在第一 频域资源内接收接入网设备发送的组播数据。
可选的，第一配置信息还包括与组播数据小区标识对应的组播无线网络临时标识RNTI，第一组播控制信道的循环冗余校验CRC信息由组播RNTI加扰。
可选的，终端设备还包括处理模块，其中：通信模块，还用于检测同步信号；处理模块，用于根据同步信号确定当前小区标识；第一组播控制信道的调制符号由当前小区标识加扰。
可选的，第一组播控制信道的调制符号由组播数据小区标识加扰。
可选的，第一配置信息还包括组播控制小区标识，该组播控制小区标识独立于组播数据小区标识和同步信号对应的小区标识，该同步信号为用于终端设备与接入网设备进行同步的信号；第一组播控制信道的调制符号由组播控制小区标识加扰。
可选的，第二频域资源为初始频域资源或第一频域资源，或者第二频域资源包括于第二配置信息中。
可选的，组播区域包括多个小区。
可选的，第一配置信息还包括小区列表，小区列表包括多个小区。
可选的，多个小区中的至少两个小区在相同的时频资源上发送相同的组播数据。
可选的，组播数据小区标识独立于同步信号对应的小区标识，该同步信号为用于终端设备与接入网设备进行同步的信号。
可选的，第一配置信息还包括组播数据小区标识对应的组播TDD时隙类型配置信息和/或组播数据小区标识对应的组播速率匹配信息。
具体的，该终端设备可通过上述模块实现上述图2和图3所示实施例中的组播通信方法中的部分或全部步骤。应理解，本申请实施例是对应方法实施例的装置实施例，对方法实施例的描述，也适用于本申请实施例。
本发明实施还提供了一种接入网设备。该接入网设备包括：通信模块。其中：
通信模块，用于在初始频域资源发送组播配置信息，该组播配置信息包括第一频域资源以及第一频域资源对应的至少一组第一配置信息，该第一配置信息包括组播数据小区标识，该组播数据小区标识对应的组播区域用于在第一频域资源内组播数据；通信模块，还用于根据第一配置信息在第一频域资源向组播区域内的终端设备发送组播数据。
可选的，组播配置信息还包括第二配置信息，第二配置信息包括组播控制信道的搜索空间和/或在第二频域资源内的控制资源集合，通信模块，还用于根据第二配置信息在第二频域资源内发送第一组播控制信道；通信模块根据第一配置信息在第一频域资源向组播区域内的终端设备发送组播数据的方式具体为：根据第一配置信息和第一组播控制信道在第一频域资源向组播区域内的终端设备发送组播数据。
可选的，第一配置信息还包括与组播数据小区标识对应的组播无线网络临时标识RNTI，第一组播控制信道的循环冗余校验CRC信息由组播RNTI加扰。
可选的，第一组播控制信道的调制符号由当前小区标识加扰，当前小区标识为同步信号对应的小区标识，同步信号用于终端设备与接入网设备进行同步。
可选的，第一组播控制信道的调制符号由组播数据小区标识加扰。
可选的，第一配置信息还包括组播控制小区标识，该组播控制小区标识独立于组播数据小区标识和同步信号对应的小区标识，该同步信号为用于终端设备与接入网设备进行同步的信号；第一组播控制信道的调制符号由组播控制小区标识加扰。
可选的，第二频域资源为初始频域资源或第一频域资源，或者第二频域资源包括于第二配置信息中。
可选的，组播区域包括多个小区。
可选的，第一配置信息还包括小区列表，小区列表包括多个小区。
可选的，多个小区中的至少两个小区在相同的时频资源上发送相同的组播数据。
可选的，组播数据小区标识独立于同步信号对应的小区标识，同步信号为用于终端设备与接入网设备进行同步的信号。
可选的，第一配置信息还包括组播数据小区标识对应的组播TDD时隙类型配置信息和/或组播数据小区标识对应的组播速率匹配信息。
具体的，该接入网设备可通过上述模块实现上述图2和图3所示实施例中的组播通信方法中的部分或全部步骤。应理解，本申请实施例是对应方法实施例的装置实施例，对方法实施例的描述，也适用于本申请实施例。
请参见图4，图4是本申请实施例公开的一种终端设备的结构示意图。如图4所示，该终端设备400包括处理器401、存储器402和通信接口403。其中，处理器401、存储器402和通信接口403相连。
其中，处理器401可以是中央处理器(central processing unit，CPU)，通用处理器，协处理器，数字信号处理器(digital signal processor，DSP)，专用集成电路(application-specific integrated circuit，ASIC)，现场可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。该处理器401也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。
其中，通信接口403用于实现与接入网设备之间的通信。
其中，处理器401调用存储器402中存储的程序代码，可执行上述方法实施例中终端设备所执行的步骤。
基于同一发明构思，本申请实施例中提供的终端设备解决问题的原理与本申请方法实施例终端设备解决问题的原理相似，因此各设备的实施可以参见方法的实施，为简洁描述，在这里不再赘述。
请参见图5，图5是本申请实施例公开的一种接入网设备的结构示意图。如图5所示，该接入网设备500包括处理器501、存储器502和通信接口503。其中，处理器501、存储器502和通信接口503相连。
其中，处理器501可以是中央处理器(central processing unit，CPU)，通用处理器，协处理器，数字信号处理器(digital signal processor，DSP)，专用集成电路(application-specific integrated circuit，ASIC)，现场可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。该处理器501也可以是 实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。
其中，通信接口503用于实现与终端设备之间的通信。
其中，处理器501调用存储器502中存储的程序代码，可执行上述方法实施例中接入网设备所执行的步骤。
基于同一发明构思，本申请实施例中提供的接入网设备解决问题的原理与本申请方法实施例接入网设备解决问题的原理相似，因此各设备的实施可以参见方法的实施，为简洁描述，在这里不再赘述。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本发明所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述的具体实施方式，对本发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的具体实施方式而已，并不用于限定本发明的保护范围，凡在本发明的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本发明的保护范围之内。

Claims (50)

  1. 一种组播通信方法，其特征在于，所述方法包括：
    终端设备在初始频域资源从接入网设备接收组播配置信息，所述组播配置信息包括第一频域资源以及所述第一频域资源对应的至少一组第一配置信息，所述第一配置信息包括组播数据小区标识，所述组播数据小区标识对应的组播区域用于在所述第一频域资源内组播数据；
    所述终端设备根据所述第一频域资源和所述第一配置信息接收所述接入网设备发送的组播数据。
  2. 根据权利要求1所述的方法，其特征在于，所述组播配置信息还包括第二配置信息，所述第二配置信息包括组播控制信道的搜索空间和/或在第二频域资源内的控制资源集合，所述方法还包括：
    所述终端设备根据所述第二配置信息在所述第二频域资源内检测第一组播控制信道；
    所述终端设备根据所述第一频域资源和所述第一配置信息接收所述接入网设备发送的组播数据，包括：
    所述终端设备根据所述第一配置信息和所述第一组播控制信道，在所述第一频域资源内接收所述接入网设备发送的组播数据。
  3. 根据权利要求2所述的方法，其特征在于，所述第一配置信息还包括与所述组播数据小区标识对应的组播无线网络临时标识RNTI，所述第一组播控制信道的循环冗余校验CRC信息由所述组播RNTI加扰。
  4. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    所述终端设备检测同步信号；
    所述终端设备根据所述同步信号确定当前小区标识；
    所述第一组播控制信道的调制符号由所述当前小区标识加扰。
  5. 根据权利要求3所述的方法，其特征在于，
    所述第一组播控制信道的调制符号由所述组播数据小区标识加扰。
  6. 根据权利要求3所述的方法，其特征在于，所述第一配置信息还包括组播控制小区标识，所述组播控制小区标识独立于所述组播数据小区标识和同步信号对应的小区标识，所述同步信号为用于所述终端设备与所述接入网设备进行同步的信号；
    所述第一组播控制信道的调制符号由所述组播控制小区标识加扰。
  7. 根据权利要求2～6中任意一项所述的方法，其特征在于，所述第二频域资源为所述初始频域资源或所述第一频域资源，或者所述第二频域资源包括于所述第二配置信息中。
  8. 根据权利要求1～7中任意一项所述的方法，其特征在于，所述组播区域包括多个小区。
  9. 根据权利要求8所述的方法，其特征在于，所述第一配置信息还包括小区列表，所述小区列表包括所述多个小区。
  10. 根据权利要求8或9所述的方法，其特征在于，所述多个小区中的至少两个小区在相同的时频资源上发送相同的组播数据。
  11. 根据权利要求1～10中任意一项所述的方法，其特征在于，所述组播数据小区标识独立于同步信号对应的小区标识，所述同步信号为用于所述终端设备与所述接入网设备进行同步的信号。
  12. 根据权利要求1～11中任意一项所述的方法，其特征在于，所述第一配置信息还包括所述组播数据小区标识对应的组播TDD时隙类型配置信息和/或所述组播数据小区标识对应的组播速率匹配信息。
  13. 一种组播通信方法，其特征在于，所述方法包括：
    接入网设备在初始频域资源发送组播配置信息，所述组播配置信息包括第一频域资源以及所述第一频域资源对应的至少一组第一配置信息，所述第一配置信息包括组播数据小区标识，所述组播数据小区标识对应的组播区域用于在所述第一频域资源内组播数据；
    所述接入网设备根据所述第一配置信息在所述第一频域资源向所述组播区域内的终端设备发送组播数据。
  14. 根据权利要求13所述的方法，其特征在于，所述组播配置信息还包括第二配置信息，所述第二配置信息包括组播控制信道的搜索空间和/或在第二频域资源内的控制资源集合，所述接入网设备根据所述第一配置信息在所述第一频域资源发送组播数据之前，所述方法还包括：
    所述接入网设备根据所述第二配置信息在所述第二频域资源内发送第一组播控制信道；
    所述接入网设备根据所述第一配置信息在所述第一频域资源向所述组播区域内的终端设备发送组播数据，包括：
    所述接入网设备根据所述第一配置信息和所述第一组播控制信道在所述第一频域资源向所述组播区域内的终端设备发送所述组播数据。
  15. 根据权利要求14所述的方法，其特征在于，所述第一配置信息还包括与所述组播数据小区标识对应的组播无线网络临时标识RNTI，所述第一组播控制信道的循环冗余校 验CRC信息由所述组播RNTI加扰。
  16. 根据权利要求15所述的方法，其特征在于，所述第一组播控制信道的调制符号由当前小区标识加扰，所述当前小区标识为同步信号对应的小区标识，所述同步信号用于所述终端设备与所述接入网设备进行同步。
  17. 根据权利要求15所述的方法，其特征在于，所述第一组播控制信道的调制符号由所述组播数据小区标识加扰。
  18. 根据权利要求15所述的方法，其特征在于，所述第一配置信息还包括组播控制小区标识，所述组播控制小区标识独立于所述组播数据小区标识和同步信号对应的小区标识，所述同步信号为用于所述终端设备与所述接入网设备进行同步的信号；所述第一组播控制信道的调制符号由所述组播控制小区标识加扰。
  19. 根据权利要求14～18中任意一项所述的方法，其特征在于，所述第二频域资源为所述初始频域资源或所述第一频域资源，或者所述第二频域资源包括于所述第二配置信息中。
  20. 根据权利要求13～19中任意一项所述的方法，其特征在于，所述组播区域包括多个小区。
  21. 根据权利要求20所述的方法，其特征在于，所述第一配置信息还包括小区列表，所述小区列表包括所述多个小区。
  22. 根据权利要求20或21所述的方法，其特征在于，所述多个小区中的至少两个小区在相同的时频资源上发送相同的组播数据。
  23. 根据权利要求13～22中任意一项所述的方法，其特征在于，所述组播数据小区标识独立于同步信号对应的小区标识，所述同步信号为用于所述终端设备与所述接入网设备进行同步的信号。
  24. 根据权利要求13～23中任意一项所述的方法，其特征在于，所述第一配置信息还包括所述组播数据小区标识对应的组播TDD时隙类型配置信息和/或所述组播数据小区标识对应的组播速率匹配信息。
  25. 一种终端设备，其特征在于，所述终端设备包括：
    通信模块，用于在初始频域资源从接入网设备接收组播配置信息，所述组播配置信息包括第一频域资源以及所述第一频域资源对应的至少一组第一配置信息，所述第一配置信 息包括组播数据小区标识，所述组播数据小区标识对应的组播区域用于在所述第一频域资源内组播数据；
    所述通信模块，还用于根据所述第一频域资源和所述第一配置信息接收所述接入网设备发送的组播数据。
  26. 根据权利要求25所述的终端设备，其特征在于，所述组播配置信息还包括第二配置信息，所述第二配置信息包括组播控制信道的搜索空间和/或在第二频域资源内的控制资源集合，
    所述通信模块，还用于根据所述第二配置信息在所述第二频域资源内检测第一组播控制信道；
    所述通信模块根据所述第一频域资源和所述第一配置信息接收所述接入网设备发送的组播数据的方式具体为：
    根据所述第一配置信息和所述第一组播控制信道，在所述第一频域资源内接收所述接入网设备发送的组播数据。
  27. 根据权利要求26所述的终端设备，其特征在于，所述第一配置信息还包括与所述组播数据小区标识对应的组播无线网络临时标识RNTI，所述第一组播控制信道的循环冗余校验CRC信息由所述组播RNTI加扰。
  28. 根据权利要求27所述的终端设备，其特征在于，所述终端设备还包括处理模块，其中：
    所述通信模块，还用于检测同步信号；
    所述处理模块，用于根据所述同步信号确定当前小区标识；
    所述第一组播控制信道的调制符号由所述当前小区标识加扰。
  29. 根据权利要求27所述的终端设备，其特征在于，所述第一组播控制信道的调制符号由所述组播数据小区标识加扰。
  30. 根据权利要求27所述的终端设备，其特征在于，所述第一配置信息还包括组播控制小区标识，所述组播控制小区标识独立于所述组播数据小区标识和同步信号对应的小区标识，所述同步信号为用于所述终端设备与所述接入网设备进行同步的信号；
    所述第一组播控制信道的调制符号由所述组播控制小区标识加扰。
  31. 根据权利要求26～30中任意一项所述的终端设备，其特征在于，所述第二频域资源为所述初始频域资源或所述第一频域资源，或者所述第二频域资源包括于所述第二配置信息中。
  32. 根据权利要求25～31中任意一项所述的终端设备，其特征在于，所述组播区域包 括多个小区。
  33. 根据权利要求32所述的终端设备，其特征在于，所述第一配置信息还包括小区列表，所述小区列表包括所述多个小区。
  34. 根据权利要求32或33所述的终端设备，其特征在于，所述多个小区中的至少两个小区在相同的时频资源上发送相同的组播数据。
  35. 根据权利要求25～34中任意一项所述的终端设备，其特征在于，所述组播数据小区标识独立于同步信号对应的小区标识，所述同步信号为用于所述终端设备与所述接入网设备进行同步的信号。
  36. 根据权利要求25～35中任意一项所述的终端设备，其特征在于，所述第一配置信息还包括所述组播数据小区标识对应的组播TDD时隙类型配置信息和/或所述组播数据小区标识对应的组播速率匹配信息。
  37. 一种接入网设备，其特征在于，所述接入网设备包括：
    通信模块，用于在初始频域资源发送组播配置信息，所述组播配置信息包括第一频域资源以及所述第一频域资源对应的至少一组第一配置信息，所述第一配置信息包括组播数据小区标识，所述组播数据小区标识对应的组播区域用于在所述第一频域资源内组播数据；
    所述通信模块，还用于根据所述第一配置信息在所述第一频域资源向所述组播区域内的终端设备发送组播数据。
  38. 根据权利要求37所述的接入网设备，其特征在于，所述组播配置信息还包括第二配置信息，所述第二配置信息包括组播控制信道的搜索空间和/或在第二频域资源内的控制资源集合，
    所述通信模块，还用于根据所述第二配置信息在所述第二频域资源内发送第一组播控制信道；
    所述通信模块根据所述第一配置信息在所述第一频域资源向所述组播区域内的终端设备发送组播数据的方式具体为：
    根据所述第一配置信息和所述第一组播控制信道在所述第一频域资源向所述组播区域内的终端设备发送所述组播数据。
  39. 根据权利要求38所述的接入网设备，其特征在于，所述第一配置信息还包括与所述组播数据小区标识对应的组播无线网络临时标识RNTI，所述第一组播控制信道的循环冗余校验CRC信息由所述组播RNTI加扰。
  40. 根据权利要求39所述的接入网设备，其特征在于，所述第一组播控制信道的调 制符号由当前小区标识加扰，所述当前小区标识为同步信号对应的小区标识，所述同步信号用于所述终端设备与所述接入网设备进行同步。
  41. 根据权利要求39所述的接入网设备，其特征在于，所述第一组播控制信道的调制符号由所述组播数据小区标识加扰。
  42. 根据权利要求39所述的接入网设备，其特征在于，所述第一配置信息还包括组播控制小区标识，所述组播控制小区标识独立于所述组播数据小区标识和同步信号对应的小区标识，所述同步信号为用于所述终端设备与所述接入网设备进行同步的信号；所述第一组播控制信道的调制符号由所述组播控制小区标识加扰。
  43. 根据权利要求38～42中任意一项所述的接入网设备，其特征在于，所述第二频域资源为所述初始频域资源或所述第一频域资源，或者所述第二频域资源包括于所述第二配置信息中。
  44. 根据权利要求37～43中任意一项所述的接入网设备，其特征在于，所述组播区域包括多个小区。
  45. 根据权利要求44所述的接入网设备，其特征在于，所述第一配置信息还包括小区列表，所述小区列表包括所述多个小区。
  46. 根据权利要求44或45所述的接入网设备，其特征在于，所述多个小区中的至少两个小区在相同的时频资源上发送相同的组播数据。
  47. 根据权利要求37～46中任意一项所述的接入网设备，其特征在于，所述组播数据小区标识独立于同步信号对应的小区标识，所述同步信号为用于所述终端设备与所述接入网设备进行同步的信号。
  48. 根据权利要求37～47中任意一项所述的接入网设备，其特征在于，所述第一配置信息还包括所述组播数据小区标识对应的组播TDD时隙类型配置信息和/或所述组播数据小区标识对应的组播速率匹配信息。
  49. 一种终端设备，其特征在于，所述终端设备包括：处理器、存储器和通信接口，所述处理器与所述存储器和所述通信接口相连，其中：
    所述存储器，用于存储一个或多个程序；
    所述通信接口，用于与接入网设备进行通信；
    所述处理器，用于执行所述存储器中的程序，以使得所述终端设备执行如权利要求1～12中任意一项所述的方法。
  50. 一种接入网设备，其特征在于，所述接入网设备包括：处理器、存储器和通信接口，所述处理器与所述存储器和所述通信接口相连，其中：
    所述存储器，用于存储一个或多个程序；
    所述通信接口，用于与终端设备进行通信；
    所述处理器，用于执行所述存储器中的程序，以使得所述接入网设备执行如权利要求13～24中任意一项所述的方法。
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