WO2020087263A1 - Procédé et appareil de transmission d'un service de multidiffusion - Google Patents

Procédé et appareil de transmission d'un service de multidiffusion Download PDF

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Publication number
WO2020087263A1
WO2020087263A1 PCT/CN2018/112629 CN2018112629W WO2020087263A1 WO 2020087263 A1 WO2020087263 A1 WO 2020087263A1 CN 2018112629 W CN2018112629 W CN 2018112629W WO 2020087263 A1 WO2020087263 A1 WO 2020087263A1
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WIPO (PCT)
Prior art keywords
control node
multicast service
combined transmission
configuration information
transmission area
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PCT/CN2018/112629
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English (en)
Chinese (zh)
Inventor
李秉肇
刘江华
官磊
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2018/112629 priority Critical patent/WO2020087263A1/fr
Priority to CN201880097124.2A priority patent/CN112640492B/zh
Publication of WO2020087263A1 publication Critical patent/WO2020087263A1/fr

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present application relates to the communication field, and more specifically, to a method and device for transmitting multicast services in the communication field.
  • Multimedia broadcast multicast service (multimedia broadcast multicast service, MBMS) is a point-to-multipoint service in a specific range, which can enable the network resources to be shared, and achieve multimedia services for a large number of users with the same needs with fewer resources.
  • the network can simultaneously dispatch service data to multiple terminal devices through the wireless network temporary identity, and the same group of services in the same cell can be scheduled through a wireless network temporary identity, even if the same group is sent in two cells
  • the MBMS service is also scheduled using different wireless network temporary identifiers.
  • the transmission between the two cells is independent.
  • the MBMS service sent by one cell will be the interference signal of the other cell, which will affect the quality of the MBMS service. This results in poor transmission performance.
  • the present application provides a method and device for transmitting a multicast service, which can improve the reception quality of the multicast service, thereby improving the transmission performance.
  • a method for transmitting a multicast service which includes: a network device determining a plurality of cells as a combined transmission area, each of the plurality of cells having the same transmission parameter for transmitting the multicast service; The network device sends first configuration information to the terminal device, where the first configuration information is used to indicate the transmission parameter and the identifier of the multicast service; the network device is in the combined transmission area according to the transmission parameter At least one cell sends the multicast service to the terminal device.
  • each cell transmits multicast services with the same transmission parameters, so that one cell or multiple cells can send the same to the terminal device according to the transmission parameters
  • Multicast service for example, a cell or multiple cells can send a multicast service to a terminal device.
  • the terminal device receives a multicast service sent by a cell
  • other cells may not send signals, which prevents other cells from pairing
  • the interference of the terminal device when the terminal device receives the multicast service sent by multiple cells, the signals can be superimposed, which can improve the quality of the received multicast service and help improve the transmission performance.
  • the terminal device when the terminal device is at the edge of the cell, the terminal device can receive the multicast service sent by multiple cells, which can improve the signal quality of the terminal device receiving the multicast service, that is, the cell of the neighboring cell transmits the same multicast During service, the terminal device can receive multiple signals at the same time, which can increase the gain of the signal received by the terminal device.
  • the terminal device is at an edge position of at least two cells in the plurality of cells, so that the terminal device at the edge can receive multiple same signals, which can increase the gain of the edge terminal device.
  • the transmission parameter includes a temporary identifier of the multicast wireless network used by the terminal device to receive the multicast service.
  • the network device is a centralized control node, and before the network device sends the multicast service to the terminal device in at least one cell in the combined transmission area, the method further The method includes: the centralized control node sends second configuration information to a distributed control node, where the second configuration information is used to indicate an identifier of at least one cell in the combined transmission area and an identifier of the multicast service; wherein ,
  • the network device sending the multicast service to the terminal device in at least one cell in the combined transmission area includes: the centralized control node passes the distributed control node in the combined transmission area At least one cell in sends the multicast service to the terminal device.
  • the second configuration information is also used to indicate at least one of the following: the frequency domain resource of the combined transmission area, the time domain resource of the combined transmission area, and the addition used by the combined transmission area Scrambling code, rate matching information used by the combined transmission area, modulation method used by the combined transmission area, code rate used by the combined transmission area, and subcarrier spacing used by the combined transmission area.
  • mapping relationship there may be a mapping relationship between the above parameters indicated by the second configuration information, for example, the mapping relationship may be pre-configured, and there may be a mapping relationship between the identification of at least one cell and the frequency domain resources of the combined transmission area when distributed
  • the distributed control node obtains the identity of at least one cell, so that the distributed control node determines the frequency domain resource of the combined transmission area according to the identity and mapping relationship of the at least one cell.
  • the method further includes: the centralized control node sending a first index to the distributed control node, where the first index is used to indicate the second configuration information; the centralized The control node sends a deletion notification message to the distributed control node, where the deletion notification message carries the first index, so that the distributed control node deletes the second configuration information according to the first index.
  • the centralized control node when the centralized control node determines that merge transmission scheduling is not required, it may send the first index to the distributed control node, so that the distributed control node deletes the second configuration information according to the first index, from the merged transmission Scheduling is transferred to self-transmission scheduling, so that distributed control nodes can flexibly switch scheduling methods, and can reduce storage space, thereby improving system performance.
  • the second configuration information is also used to indicate time information, where the time information is a start time for the distributed control node to perform combined transmission on the combined transmission area, and / or, The duration of the combined transmission on the combined transmission area.
  • the duration may be preset; when the time information is for the distributed control node to When the duration of the merge on the merge transmission area is described, the start time may be preset.
  • the transmission parameter further includes at least one of the following: a scrambling code of the multicast service sent by the network device, rate matching information of the multicast service sent by the network device, the The modulation method by which the network device sends the multicast service, the bandwidth part BWP of the multicast service sent by the network device, the bit rate of the multicast service sent by the network device, and the multicast sent by the network device Service subcarrier spacing.
  • the network device is a centralized control node
  • sending the first configuration information to the terminal device by the network device includes: the centralized control node sends the configuration information to the terminal device through the distributed control node.
  • the first configuration information is described.
  • a method for transmitting a multicast service which includes: a distributed control node receives second configuration information sent by a centralized control node, where the second configuration information includes a combined transmission area composed of multiple cells An identifier of at least one cell in and an identifier of the multicast service, wherein each cell in the plurality of cells has the same transmission parameter for transmitting the multicast service; the distributed control node according to the second configuration The information determines the cell managed by the distributed control node; the distributed control node sends the multicast service to the terminal device in the managed cell.
  • the second configuration information is also used to indicate at least one of the following: the frequency domain resource of the combined transmission area, the time domain resource of the combined transmission area, and the addition used by the combined transmission area Scrambling code, rate matching information used by the combined transmission area, modulation method used by the combined transmission area, code rate used by the combined transmission area, and subcarrier spacing used by the combined transmission area.
  • the method further includes: the distributed control node receiving a first index sent by the centralized control node, where the first index is used to indicate the second configuration information; After the distributed control node receives the first index sent by the centralized control node, the method further includes: the distributed control node receives a deletion notification message sent by the centralized control node, and the deletion notification message carries the A first index; the distributed control node deletes the second configuration information according to the first index.
  • the second configuration information further includes time information, where the time information is a start time for the distributed control node to perform combined transmission on the combined transmission area, and / or, The duration of the combined transmission on the combined transmission area; wherein the distributed control node sending the multicast service to the terminal device in the covered cell includes: the distributed control node according to the The time information sends the multicast service to the terminal device in the covered cell.
  • the method before the distributed control node sends the multicast service to the terminal device in the covered cell, the method further includes the distributed control node receiving the centralized Configuration information sent by a local control node, the first configuration information is used to indicate the identifier of the multicast service and the temporary identifier of the multicast wireless network used by the terminal device to receive the multicast service; the distribution The control node sends the first configuration information to the terminal device.
  • the first configuration information further includes at least one of the following: the centralized control node sends the scrambling code of the multicast service, and the centralized control node sends the multicast service.
  • Rate matching information the modulation method by which the centralized control node sends the multicast service, the bandwidth part of the centralized control node sending the multicast service BWP, and the bit rate of the network device sending the multicast service And a subcarrier interval for sending the multicast service with the network device.
  • a method for transmitting a multicast service includes: a terminal device receives first configuration information sent by a network device, where the first configuration information is used to indicate the transmission parameter and the multicast Service identification. The terminal device receives the multicast service according to the first configuration information.
  • the transmission parameter includes a multicast wireless network temporary identifier used by the terminal device to receive the multicast service.
  • the transmission parameter further includes at least one of the following: the network device sends a scrambling code of the multicast service, the network device sends rate matching information of the multicast service, and the network device sends The modulation method of the multicast service, the bandwidth part BWP of the multicast service sent by the network device and the bit rate of the multicast service sent by the network device and the sub-sent of the multicast service sent by the network device Carrier spacing.
  • the multicast service is a service transmitted on a combined transmission area composed of the multiple cells, and the transmission parameters of each cell in the multiple cells are the same.
  • the network device is a centralized control node, wherein the terminal device receiving the first configuration information sent by the network device includes: the terminal device receiving the centralized control node through the distribution The first configuration information sent by the local control node.
  • a device for transmitting multicast services for performing the method in any possible implementation manner in any of the above aspects.
  • the apparatus includes a unit for performing the method in any possible implementation manner of the first aspect described above.
  • a device for transmitting a multicast service for performing the method in any possible implementation manner in any of the above aspects.
  • the apparatus includes a unit for performing the method in any possible implementation manner of the second aspect described above.
  • a device for transmitting multicast services for performing the method in any possible implementation manner in any one of the above aspects.
  • the device includes a unit for performing the method in any possible implementation manner of the third aspect.
  • the apparatus includes: a transceiver, a memory, and a processor.
  • the transceiver, the memory and the processor communicate with each other through an internal connection path
  • the memory is used to store instructions
  • the processor is used to execute the instructions stored in the memory to control the receiver to receive signals
  • control the transmitter to send signals
  • the processor executes the instructions stored in the memory, causes the processor to execute the method in any one of the possible implementation manners of the first aspect described above.
  • the apparatus includes: a transceiver, a memory, and a processor.
  • the transceiver, the memory and the processor communicate with each other through an internal connection path
  • the memory is used to store instructions
  • the processor is used to execute the instructions stored in the memory to control the receiver to receive signals
  • the transmitter to send signals
  • the processor executes the instructions stored in the memory, causes the processor to execute the method in any one of the possible implementation manners of the second aspect above.
  • the device includes: a transceiver, a memory, and a processor.
  • the transceiver, the memory and the processor communicate with each other through an internal connection path
  • the memory is used to store instructions
  • the processor is used to execute the instructions stored in the memory to control the receiver to receive signals
  • control the transmitter to send signals
  • the processor executes the instructions stored in the memory, causes the processor to execute the method in any one of the possible implementation manners of the third aspect.
  • a computer program product includes: computer program code, which, when the computer program code is executed by a computer, causes the computer to perform the methods in the above aspects.
  • a computer-readable medium for storing a computer program, the computer program including instructions for performing the method in the above aspects.
  • a chip including a processor, for calling and running instructions stored in the memory from a memory, so that a communication device mounted with the chip executes the method in the above aspects.
  • the communication device is the foregoing apparatus for transmitting multicast services.
  • another chip including: an input interface, an output interface, a processor, and a memory, and the input interface, the output interface, the processor, and the memory are connected by an internal connection path.
  • the processor is used to execute the code in the memory, and when the code is executed, the processor is used to execute the method in the above aspects.
  • FIG. 1 is a schematic diagram of a communication system used in an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a method for transmitting a multicast service provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a rate matching configuration provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of another method for transmitting a multicast service provided by an embodiment of the present application.
  • FIG. 5 is a schematic block diagram of an apparatus for transmitting multicast services provided by an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of another apparatus for transmitting a multicast service provided by an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of another apparatus for transmitting a multicast service provided by an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of another apparatus for transmitting a multicast service provided by an embodiment of the present application.
  • GSM global mobile communication
  • CDMA code division multiple access
  • WCDMA broadband code division multiple access
  • general packet radio service general packet radio service, GPRS
  • LTE long term evolution
  • LTE frequency division duplex FDD
  • TDD time division duplex
  • UMTS universal mobile communication system
  • WiMAX worldwide interoperability for microwave access
  • the terminal device in the embodiment of the present application may refer to user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or User device.
  • Terminal devices can also be cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (wireless local loop (WLL) stations, personal digital assistants (personal digital assistants, PDAs), wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or public land mobile communication networks (PLMN) in the future evolution
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDAs personal digital assistants
  • wireless communication Functional handheld devices computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or public land mobile communication networks (PLMN) in the future evolution
  • PLMN public land mobile communication networks
  • the network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may be a global system for mobile (GSM) system or code division multiple access (CDMA)
  • GSM global system for mobile
  • CDMA code division multiple access
  • the base transceiver station (BTS) in the system can also be a base station (NodeB, NB) in a wideband code division multiple access (WCDMA) system, or an evolved base station (evolved) in an LTE system NodeB, eNB or eNodeB), or a wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, an access point, an in-vehicle device, a wearable device, and future Network devices in a 5G network or network devices in a PLMN network that will evolve in the future are not limited in the embodiments of the present application.
  • the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes central processing unit (CPU), memory management unit (memory management unit, MMU), and memory (also called main memory) and other hardware.
  • the operating system may be any one or more computer operating systems that implement business processes through processes, for example, a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system.
  • the application layer includes browser, address book, word processing software, instant messaging software and other applications.
  • the embodiment of the present application does not specifically limit the specific structure of the execution body of the method provided in the embodiment of the present application, as long as it can run the program that records the code of the method provided by the embodiment of the present application to provide according to the embodiment of the present application
  • the method may be used for communication.
  • the execution body of the method provided in the embodiments of the present application may be a terminal device or a network device, or a functional module in the terminal device or network device that can call a program and execute the program.
  • the term "article of manufacture” as used in this application encompasses a computer program accessible from any computer-readable device, carrier, or medium.
  • the computer-readable medium may include, but is not limited to: magnetic storage devices (for example, hard disks, floppy disks, or magnetic tapes, etc.), optical disks (for example, compact discs (CDs), digital universal discs (digital discs, DVDs)) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
  • various storage media described herein may represent one or more devices and / or other machine-readable media for storing information.
  • machine-readable medium may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.
  • FIG. 1 is a schematic diagram of a communication system used in an embodiment of the present application.
  • the communication system 100 includes a network device 102, and the network device 102 may include multiple antenna groups.
  • Each antenna group may include one or more antennas, for example, one antenna group may include antennas 104 and 106, another antenna group may include antennas 108 and 110, and an additional group may include antennas 112 and 114. 2 antennas are shown for each antenna group in FIG. 1, however more or fewer antennas can be used for each group.
  • the network device 102 may additionally include a transmitter chain and a receiver chain, and those of ordinary skill in the art may understand that they can all include multiple components related to signal transmission and reception, such as a processor, a modulator, a multiplexer, and a solution. Tuner, demultiplexer or antenna, etc.
  • the network device 102 can communicate with multiple terminal devices, for example, the network device 102 can communicate with the terminal device 116 and the terminal device 122. However, it is understood that the network device 102 can communicate with any number of terminal devices similar to the terminal devices 116 or 122.
  • Terminal devices 116 and 122 may be, for example, cellular phones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and / or any other suitable devices for communicating on wireless communication system 100 device.
  • the terminal device 116 communicates with the antennas 112 and 114, where the antennas 112 and 114 send information to the terminal device 116 through the forward link 118 and receive information from the terminal device 116 through the reverse link 120.
  • the terminal device 122 communicates with the antennas 104 and 106, where the antennas 104 and 106 transmit information to the terminal device 122 via the forward link 124 and receive information from the terminal device 122 via the reverse link 126.
  • the forward link 118 may utilize a different frequency band used by the reverse link 120 and the forward link 124 may utilize a different frequency band used by the reverse link 126 .
  • the forward link 118 and the reverse link 120 may use a common frequency band
  • the forward link 124 and the reverse link 126 may use a common frequency band
  • Each group of antennas and / or areas designed for communication is called a sector of the network device 102.
  • the antenna group may be designed to communicate with terminal devices in sectors in the coverage area of the network device 102.
  • the transmit antenna of the network device 102 may use beamforming to improve the signal-to-noise ratio of the forward links 118 and 124.
  • the network device 102 uses beamforming to transmit signals to randomly distributed terminal devices 116 and 122 in the relevant coverage area, the network device 102 sends signals to all its terminal devices through a single antenna. Mobile devices will experience less interference.
  • the network device 102, the terminal device 116, or the terminal device 122 may be a wireless communication transmitting device and / or a wireless communication receiving device.
  • the wireless communication transmitting device may encode the data for transmission.
  • the wireless communication transmitting device may acquire a certain number of data bits to be transmitted to the wireless communication receiving device through the channel, for example, the wireless communication transmitting device may generate, receive from other communication devices, or save in a memory, etc. to be transmitted through the channel A certain number of data bits to the wireless communication receiving device.
  • Such data bits may be contained in a transport block or multiple transport blocks of data, and the transport block may be segmented to generate multiple code blocks.
  • the communication system 100 may be a public land mobile network PLMN network or a device-to-device (D2D) network or a machine-to-machine (M2M) network or other networks.
  • PLMN public land mobile network
  • D2D device-to-device
  • M2M machine-to-machine
  • FIG. 1 is only an example for ease of understanding.
  • the simplified schematic diagram of the network may also include other network devices, which are not shown in FIG. 1.
  • the network device in FIG. 1 is composed of a centralized control node and one or more distributed control nodes, where:
  • the centralized control node is used to determine that multiple cells are combined into a combined transmission area, configure transmission parameters for each cell in the combined transmission area, and then send the configured transmission parameters to the distributed control node and the terminal device.
  • the distributed control node is used for: the distributed control node sends multicast services to the terminal device in one or more cells managed by itself according to the transmission parameters.
  • the centralized control node may be an access network device, such as a primary base station; the distributed control node may also be an access network device, such as a secondary base station.
  • the centralized control node and the distributed control node together form an access network device, such as a base station, for example, the centralized control node is a centralized unit (CU), and the distributed control node is Distributed unit (Distributed unit, DU). It is just that the centralized control node and the distributed control node are responsible for different communication tasks in the communication process.
  • Temporary multicast group identifier is used to identify MBMS services.
  • Multicast wireless network temporary identification radio network temporary identity, G-RNTI
  • PDCCH physical downlink control channel
  • TMGI TMGI and G-RNTI
  • the bandwidth part (BWP) is used to represent frequency resources, for example, one or more subbands in the frequency domain.
  • the network sends multicast services to one or more terminal devices through broadcast or multicast.
  • the same multicast service in the same cell can be scheduled with one transmission parameter. Even if two cells send the same multicast service , The two cells also use different transmission parameters for scheduling, and the two cells are independent of each other.
  • the multicast service sent in one cell will become an interference signal in another cell, which will affect the reception quality of the multicast service. , Thereby degrading the performance of transmitting multicast services.
  • the terminal device is at the edge of the cell, the ability of the terminal device to receive the multicast service of the local cell is reduced, but it can receive a strong interference signal sent by the neighboring cell, so that the terminal device at the edge of the cell receives more The ability to broadcast business is greatly reduced.
  • multiple cells transmitting the same multicast service can be combined as a large area, so that there is no interference between multiple cells transmitting the same multicast service, and For the terminal device, multiple signals corresponding to the same multicast service can be received. In this way, the reception quality of the multicast is improved, thereby improving the transmission performance.
  • FIG. 2 shows a method for transmitting a multicast service provided by an embodiment of the present application.
  • the method includes:
  • the network device determines multiple cells as a combined transmission area. Each cell in the multiple cells transmits the same multicast service transmission parameters; the combined transmission area is used to transmit the multicast service, that is, in this application If multiple cells transmit the same multicast service, you can combine the multiple cells. For example, the network device may determine multiple cells as the combined transmission area according to the type of multicast service, and combine multiple cells transmitting the same type of multicast service as the combined transmission area. Of course, the network device may also determine based on other information Multiple cells are used as the combined transmission area, which is not limited in this embodiment of the present application.
  • the transmission parameter may include the temporary identifier G-RNTI of the multicast wireless network used by the terminal device to receive the multicast service.
  • the transmission parameter may further include at least one of the following: the network device sends a scrambling code of the multicast service, the network device sends rate matching information of the multicast service, the The modulation method for the multicast service sent by the network device, the BWP information of the bandwidth part of the multicast service sent by the network device, the code rate of the multicast service sent by the network device and the sub-band used by the combined transmission area Carrier spacing.
  • the BWP information is used to instruct the terminal device to receive the BWP of the multicast service. If the BWP information is not configured, the terminal device uses the initial BWP to receive the multicast service.
  • the BPW information includes frequency domain information and subcarrier spacing (SCS) of the BPW.
  • the BWP information may further include search space information and / or control resource set (control resource set, CORESET) information.
  • the search space indicates the time domain position and detection format of the G-RNTI detection when the terminal device receives the multicast service by the BWP.
  • the COREST information indicates the frequency domain position detected by the G-RNTI when the BWP performs multicast service reception.
  • the rate matching information is mainly used to inform the terminal device that the multicast resources that need to be deducted from the multicast resources when receiving the multicast service cannot be used as multicast data transmission resources.
  • the network device may comprehensively generate a rate matching configuration based on the reference signal position in each cell for combined transmission. For example, as shown in FIG. 3, assume that cell 1, cell 2, and cell 3 form a merged area. In the cell 1, cell 2 and cell 3 have their own reference signal location configuration, in order to make the terminal device not affected by the reference signals of the three campuses when receiving from the merged area, the network device can configure the rate matching of the merged area for the terminal device Parameters, as shown in FIG.
  • the rate matching parameter indicates that the position of the reference signal composed of these three cells cannot be used as a resource for multicast data transmission.
  • the G-RNTI may send the scrambling code of the multicast service with the network device, and the network device sends the Multicast service rate matching information, the modulation method by which the network device sends the multicast service, the bandwidth part BWP information of the multicast service sent by the network device, and the code of the multicast service sent by the network device
  • the network device can send the G-RNTI to the terminal device, and the terminal device can determine other parameters according to the G-RNTI and the mapping relationship, for example, scrambling code, rate matching information, modulation Mode, BWP, code rate and subcarrier spacing.
  • the transmission parameters may include one or more parameters in G-RNTI, scrambling code, rate matching information, modulation method, BWP, code rate, and subcarrier interval, and the one or more parameters have a mapping relationship with other parameters
  • the terminal device receives the one or more parameters, it can derive other mapping relationships based on the one or more parameters and the mapping relationship.
  • the transmission parameters include G-RNTI and modulation mode, G-RNTI There is a mapping relationship between the modulation method and the scrambling code, rate matching information, BWP, code rate, and subcarrier spacing.
  • the terminal device learns the G-RNTI and modulation method, the scrambling code, Rate matching information, BWP, code rate, and subcarrier spacing.
  • the transmission parameters of each cell to transmit the multicast service are the same, for example, it can be understood that if the transmission parameters include G-RNTI, the G-RNTI of each cell to transmit the multicast service is the same ; If the transmission parameters include G-RNTI and modulation method, the G-RNTI for each cell to transmit multicast service is the same, and the modulation method for each cell to transmit multicast service is the same; if the transmission parameter includes G-RNTI, modulation method and code Rate, then each cell transmits the same G-RNTI multicast service, each cell transmits the same multicast service modulation method, and each cell transmits the same multicast service code rate. In order to avoid repeated descriptions, here are not examples Instructions.
  • the network device sends first configuration information to the terminal device, where the first configuration information is used to indicate the transmission parameter and the identifier of the multicast service.
  • the identifier of the multicast service may be TMGI.
  • the network device sending the first configuration information to the terminal device includes the network device carrying the first configuration information in a multicast control channel (multicast control channel, MCCH) and sending the terminal device to the terminal device.
  • the network device may include the MCCH configuration parameters in the system message and broadcast to the terminal device.
  • the configuration parameters of the MCCH include time domain information of the multicast control channel, and / or RNTI used by the multicast control channel. In this way, the terminal device can obtain the MCCH configuration adoption number in the system message, determine the MCCH according to the MCCH configuration parameters, and then the terminal device receives the first configuration information from the MCCH.
  • the network device sends the multicast service to the terminal device in at least one cell in the combined transmission area according to the transmission parameter. For example, the network device may send the multicast service to the terminal device according to the transmission parameter in each cell of the plurality of cells, or the network device may send a part of the cells in the plurality of cells according to the transmission parameter to the terminal device.
  • the terminal device sends the multicast service.
  • the network device sending the multicast service to the terminal device includes: the network device sending the multicast service to the terminal device in a multicast or broadcast manner.
  • the terminal device can receive the multicast service sent by the multiple cells, which can improve the terminal device
  • the signal quality of the received multicast service that is, when the cell of the adjacent cell transmits the same multicast service, the terminal device can receive multiple signals at the same time, which can increase the gain of the terminal device to receive the signal.
  • the terminal device is at an edge position of at least two cells in the plurality of cells. Due to the poor received signal quality of the terminal device at the cell edge, the combined transmission in the embodiment of the present application The method can improve the quality of the received signal of the edge terminal device.
  • the method of transmitting the multicast service is to combine multiple cells, and the transmission parameters of each cell to transmit the multicast service are the same, so that each cell can send the same multicast to the terminal device Service, in this way, when the terminal device can receive the multicast service sent by multiple cells, the signals can be superimposed, which can improve the quality of the received multicast service, thereby improving the transmission performance.
  • the network device may be an access network device, or may also be the aforementioned centralized control node.
  • a method 400 for transmitting a multicast service may include:
  • the centralized control node determines multiple cells as a combined transmission area, and each cell in the multiple cells has the same transmission parameter for transmitting the multicast service. For details, see the description in S210.
  • the centralized control node sends second configuration information to the distributed control node.
  • the distributed control node receives the second configuration information sent by the centralized control node.
  • the second configuration information is used to indicate the combined transmission area. The identification of at least one cell of the cell and the identification of the multicast service.
  • the distributed control node determines the cell managed by the distributed control node according to the second configuration information.
  • the second configuration information may indicate the cell ID and the multicast service ID managed by the distributed control node in the multiple cells.
  • the distributed control node determines in which cells to send the multicast service to the terminal device according to the cell identity; optionally, the second configuration information may indicate the identity of each cell in multiple cells, when the distributed control node receives the second configuration information At this time, the cell managed by itself is determined according to the second configuration information in multiple cells, and then the multicast service is sent to the terminal device in the cell managed by itself.
  • the second configuration information is further used to indicate at least one of the following: frequency domain resources of the combined transmission area, time domain resources of the combined transmission area, and use of the combined transmission area Scrambling code, rate matching information used by the combined transmission area, modulation method used by the combined transmission area, code rate used by the combined transmission area, and subcarrier spacing used by the combined transmission area.
  • the time domain resource is the time domain resource of the combined transmission area, and may specifically include period information, offset, and duration configuration. For example, taking a 10-slot cycle as the period, a duration of 2 slots, and an offset of 0 means that the first 2 slots in each 10-slot cycle are combined transmission resources. If the second configuration information does not include time domain resources, it may implicitly indicate that the time resources can continue to send multicast services.
  • the method 400 further includes: the centralized control node sends a first index to the distributed control node, and the distributed control node receives the first index sent by the centralized control node , The first index is used to indicate the second configuration information; the centralized control node sends a delete notification message to the distributed control node, the delete notification message carries the first index, the distributed The control node deletes the second configuration information according to the first index.
  • the centralized control node when the centralized control node determines that merge transmission scheduling is not required, it may send the first index to the distributed control node, so that the distributed control node deletes the second configuration information according to the first index, from the merge Transmission scheduling is transferred to self-transmission scheduling, so that distributed control nodes can flexibly switch scheduling methods, and can reduce storage space, thereby improving system performance.
  • the second configuration information and the first index may be sent by the centralized control node to the distributed control node at the same time, or may be sent separately, which is not limited in this embodiment of the present application.
  • the embodiment of the present application does not limit the order of sending the first index and the second configuration information.
  • the centralized control node sends first configuration information to the terminal device through the distributed control node, where the first configuration information is used to indicate the transmission parameter and the identifier of the multicast service.
  • the distributed control node may directly transmit the first configuration information to the terminal device without parsing.
  • the distributed control node may generate first configuration information according to the second configuration information, and send the produced first configuration information to the terminal device.
  • the specific distributed control node 2. Configuration information The method of producing the first configuration information is not limited.
  • the centralized control node sends the multicast service to the distributed control node, the distributed control node sends the multicast service to the terminal device in the managed cell, and the terminal device receives the distributed control according to the first configuration information The multicast service sent by the node.
  • the second configuration information is also used to indicate time information, where the time information is a start time for the distributed control node to perform combined transmission on the combined transmission area, and / or, The duration of the combined transmission on the combined transmission area.
  • the distributed control node sending the multicast service to the terminal device in the covered cell includes: the distributed control node sends the multicast service to the terminal in the covered cell according to the time information The terminal device sends the multicast service.
  • the time information is the starting time for the distributed control node to merge on the merged transmission area
  • the duration may be preset; when the time information is for the distributed control node to When the duration of merging on the merging transmission area, the starting time may be preset.
  • the distributed control node adopts the combined transmission scheduling from the start time to the end time, and uses the self-transmission scheduling outside this time. In this way, the timing of the combined transmission scheduling can be reasonably planned. For example, when the terminal device feeds back to the network device that the current reception quality of the received multicast service is poor, the centralized control node determines that the combined transmission scheduling is required, and the centralized control node The distributed control node sends the time information indicated by the second configuration information, and the distributed control node sends the multicast service to the terminal device according to the time information.
  • the order of S420 and S440 is not limited, and S420 may be before or after S440, that is, the first configuration information sent by the centralized control node to the terminal device may be distributed to the centralized control node Before or after the second configuration information sent by the node, this embodiment of the present application does not limit this.
  • the order before S420 and S440 and S450 is not limited, that is, S450 can be before or after S420 and S440, or S450 can also be between S420 and S440, that is, the centralized control node passes the distributed control node
  • the multicast service sent to the terminal device may be before or after the centralized control node sends configuration information to the terminal device or the distributed control node.
  • the terminal device may first receive the multicast service, and then The first configuration information of is to decapsulate the multicast service.
  • the scrambling code used by the network device to send the multicast service included in the transmission parameter and the scrambling code used by the combined transmission area indicated by the second configuration may be the same; the network device included by the transmission parameter The rate matching information for sending the multicast service may be the same as the rate matching information for the combined transmission area indicated by the second configuration; the transmission parameter includes the modulation method and the second configuration for the network device to send the multicast service The indicated modulation method used by the combined transmission area may be the same; the transmission parameter includes the bandwidth part of the network device sending the multicast service and the bandwidth part used by the combined transmission area indicated by the second configuration may be the same; transmission The parameter includes the code rate of the network device to send the multicast service and the code rate used by the combined transmission area indicated by the second configuration may be the same; the transmission parameter includes the sub-node of the network device to send the multicast service
  • the carrier interval may be the same as the subcarrier interval used by the combined transmission area indicated by the second configuration.
  • the centralized control node when there is one centralized control node and multiple distributed control nodes, the centralized control node sends the same second configuration information to each distributed control node, that is, each parameter indicated by the second configuration information is the same; Or when the centralized control node sends the second configuration information to each control node, at least one of the multiple cells indicated by the second configuration information may be a cell managed by the corresponding distributed control node, and each cell in the multiple cells The other information indicated by the received second configuration information is the same.
  • the centralized control node determines that cell 1, cell 2, cell 3, and cell 4 are combined transmission areas, distributed control node 1 manages cell 1, cell 2, and cell 5, and distributed control node 2 manages cell 3, cell 4, and Cell 6; the centralized control node may send the same second configuration information to the distributed control node 1 and the distributed control node 2, the second configuration information indicating cell 1, cell 2, cell 3, and cell 4, the distributed control node 1 According to the cell 1, cell 2, cell 3, and cell 4 indicated by the second configuration information, it is determined that the cell 1 and cell 2 managed by itself need to send the multicast service, and the distributed control node 2 indicates the cell 1 according to the second configuration information Cell 2, Cell 3 and Cell 4 determine that the cells they manage are Cell 3 and Cell 4 need to send multicast services; or the second configuration information sent from the centralized control node to the distributed control node 1 instructs Cell 1 and Cell 2 to The second configuration information sent by the distributed control node 2 indicates cell 3 and cell 4, and other information indicated by the second configuration information (frequency domain resource, time domain resource, scrambling scr
  • the distributed control node 1 determines that the cell 1 and the cell 2 under its management need to send the multicast service according to the cell 1 and cell 2 indicated by the second configuration information.
  • the distributed control node 2 determines that the cells 3 and 4 managed by itself need to send the multicast service according to the cells 3 and 4 indicated by the second configuration information.
  • the centralized control node determines multiple cells as the combined transmission area and determines the transmission parameters of the multiple cells , And the transmission parameters of each cell are the same, each cell transmits the same multicast service, then the centralized control node sends the second configuration information to the distributed control node, and sends the first configuration to the terminal device through the distributed control node Information, and finally the centralized control node sends the multicast service to the distributed control node.
  • the distributed control node determines the cell managed by itself according to the second configuration information, and sends the multicast service to the terminal device according to the second configuration information in the determined cell.
  • the terminal The device receives the multicast service according to the first configuration information. In this way, sending the multicast service through multiple cells can improve the reception quality of the terminal device to receive the multicast service.
  • FIG. 5 shows an apparatus 500 for transmitting a multicast service provided by an embodiment of the present application.
  • the apparatus 500 may be a network device or a centralized control node, or may be a chip in the network device or the centralized control node.
  • the device 500 includes a processing unit 510 and a transceiver unit 520.
  • the processing unit 510 is configured to determine multiple cells as a combined transmission area, and each cell in the multiple cells has the same transmission parameter for transmitting the multicast service;
  • the transceiver unit 520 is configured to send first configuration information to the terminal device, where the first configuration information is used to indicate the transmission parameter and the identifier of the multicast service;
  • the transceiver unit 520 is further configured to send the multicast service to the terminal device in at least one cell in the combined transmission area according to the transmission parameter.
  • the transmission parameter includes a temporary identifier of the multicast wireless network used by the terminal device to receive the multicast service.
  • the apparatus is a centralized control node
  • the transceiver unit 520 is further configured to: before at least one cell in the combined transmission area sends the multicast service to the terminal device,
  • the distributed control node sends second configuration information, where the second configuration information is used to indicate the identity of at least one cell in the combined transmission area and the identity of the multicast service;
  • the transceiver unit 520 is specifically configured to send the multicast service to the terminal device through the distributed control node in at least one cell in the combined transmission area.
  • the second configuration information is also used to indicate at least one of the following: the frequency domain resource of the combined transmission area, the time domain resource of the combined transmission area, and the addition used by the combined transmission area Scrambling code, rate matching information used by the combined transmission area, modulation method used by the combined transmission area, code rate used by the combined transmission area, and subcarrier spacing used by the combined transmission area.
  • the transceiver unit 520 is further configured to: send a first index to the distributed control node, where the first index is used to indicate the second configuration information; to the distributed control node Sending a deletion notification message, where the deletion notification message carries the first index, so that the distributed control node deletes the second configuration information according to the first index.
  • the second configuration information is also used to indicate time information, where the time information is a start time for the distributed control node to perform combined transmission on the combined transmission area, and / or, The duration of the combined transmission on the combined transmission area.
  • the transmission parameter further includes at least one of the following: the transceiver unit sends a scrambling code of the multicast service, the transceiver unit sends rate matching information of the multicast service, the Modulation mode of the multicast service sent by the transceiver unit, the bandwidth part BWP of the multicast service sent by the transceiver unit, the bit rate of the multicast service sent by the transceiver unit and the multicast sent by the transceiver unit Service subcarrier spacing.
  • the apparatus is a centralized control node, and the transceiver unit 520 is specifically configured to send the first configuration information to the terminal device through a distributed control node.
  • the device 500 here is embodied in the form of a functional unit.
  • the term "unit” here may refer to an application-specific integrated circuit (application specific integrated circuit, ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor or a group) for executing one or more software or firmware programs Processor, etc.) and memory, merge logic, and / or other suitable components that support the described functions.
  • ASIC application specific integrated circuit
  • the apparatus 500 may specifically be the network device or the centralized control node in the foregoing embodiment, and the apparatus 500 may be used to perform the above-described method embodiment with the network device or the centralized control.
  • the various processes and / or steps corresponding to the nodes are not repeated here to avoid repetition.
  • FIG. 6 shows an apparatus 600 for transmitting a multicast service provided by an embodiment of the present application.
  • the apparatus 600 may be a distributed control node or a chip in the distributed control node.
  • the device 600 includes a transceiver unit 610 and a processing unit 620.
  • the transceiver unit 610 is configured to receive second configuration information sent by a centralized control node, where the second configuration information includes an identifier of at least one cell in a combined transmission area composed of multiple cells and an identifier of the multicast service , Wherein each of the multiple cells transmits the multicast service with the same transmission parameters;
  • the processing unit 620 is configured to determine the cell managed by the distributed control node according to the second configuration information
  • the transceiver unit 610 is also used to send the multicast service to the terminal device in the managed cell.
  • the second configuration information is also used to indicate at least one of the following: the frequency domain resource of the combined transmission area, the time domain resource of the combined transmission area, and the addition used by the combined transmission area Scrambling code, rate matching information used by the combined transmission area, modulation method used by the combined transmission area, code rate used by the combined transmission area, and subcarrier spacing used by the combined transmission area.
  • the transceiver unit 610 is further configured to: receive a first index sent by the centralized control node, where the first index is used to indicate the second configuration information; and receive the centralized control The node sends a deletion notification message, where the deletion notification message carries the first index; the processing unit 620 is further configured to delete the second configuration information according to the first index.
  • the second configuration information further includes time information, where the time information is the start time for the distributed control node to perform combined transmission on the combined transmission area, and / or The duration of the combined transmission on the combined transmission area;
  • the transceiver unit 610 is specifically configured to send the multicast service to the terminal device in the covered cell according to the time information.
  • the transceiver unit 610 is further configured to: before sending the multicast service to the terminal device in the covered cell, receive the first configuration information sent by the centralized control node, The first configuration information is used to indicate the identifier of the multicast service and the temporary identifier of the multicast wireless network used by the terminal device to receive the multicast service; and send the first configuration information to the terminal device.
  • the first configuration information further includes at least one of the following: the centralized control node sends the scrambling code of the multicast service, and the centralized control node sends the multicast service.
  • Rate matching information the modulation method by which the centralized control node sends the multicast service
  • the centralized control node sends the bandwidth part of the multicast service BWP information
  • the centralized control node sends the multicast service Bit rate
  • the device 600 here is embodied in the form of a functional unit.
  • the term "unit” here may refer to an application-specific integrated circuit (application specific integrated circuit, ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor or a group) for executing one or more software or firmware programs Processor, etc.) and memory, merge logic, and / or other suitable components that support the described functions.
  • ASIC application specific integrated circuit
  • processor such as a shared processor, a proprietary processor or a group
  • memory merge logic, and / or other suitable components that support the described functions.
  • the device 600 may be specifically a distributed control node in the foregoing embodiment, and the device 600 may be used to execute various processes corresponding to the distributed control node and / Or steps, to avoid repetition, they will not be repeated here.
  • the apparatus 500 of each of the above solutions has a function of implementing the corresponding steps performed by the network device or the centralized control node in the above method, and the apparatus 600 of each of the above solutions has the function of implementing the corresponding steps of the distributed control node of the above method; It 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; for example, the sending unit may be replaced by a transmitter, the receiving unit may be replaced by a receiver, and other units, such as a determination unit, etc. may be replaced by processors, which are respectively executed The sending and receiving operations and related processing operations in each method embodiment.
  • the devices in FIG. 5 and FIG. 6 may also be chips or chip systems, for example, a system on chip (SoC).
  • the receiving unit and the sending unit may be the transceiver circuit of the chip, which is not limited herein.
  • FIG. 7 shows another apparatus 700 for transmitting multicast services provided by an embodiment of the present application.
  • the device 700 includes a processor 710, a transceiver 720, and a memory 730.
  • the processor 710, the transceiver 720 and the memory 730 communicate with each other through an internal connection path
  • the memory 730 is used to store instructions
  • the processor 710 is used to execute the instructions stored in the memory 730 to control the transceiver 720 to send signals and / Or receive signals.
  • the processor 910 is used to determine multiple cells as a combined transmission area, and each cell in the multiple cells has the same transmission parameter for transmitting the multicast service; the transceiver 720 is used to send first configuration information to the terminal , The first configuration information is used to indicate the transmission parameter and the identifier of the multicast service; the transceiver 720 is also used to send at least one cell in the combined transmission area to the The terminal device sends the multicast service
  • the apparatus 700 may specifically be the network device or the centralized control node in the foregoing embodiments, and may be used to execute various steps and / or processes corresponding to the network device or the centralized control node in the foregoing method embodiments.
  • the memory 730 may include a read-only memory and a random access memory, and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory.
  • the memory may also store device type information.
  • the processor 710 may be used to execute instructions stored in the memory, and when the processor 910 executes instructions stored in the memory, the processor 710 is used to execute the method embodiment corresponding to the network device or the centralized control node described above Various steps and / or processes.
  • FIG. 8 shows another apparatus 800 for transmitting multicast services provided by an embodiment of the present application.
  • the device 800 includes a processor 810, a transceiver 820, and a memory 830. Among them, the processor 810, the transceiver 820, and the memory 830 communicate with each other through an internal connection path.
  • the memory 830 is used to store instructions.
  • the processor 810 is used to execute the instructions stored in the memory 830 to control the transceiver 820 to send signals and / Or receive signals.
  • the transceiver 820 is configured to receive second configuration information sent by a centralized control node, where the second configuration information includes an identifier of at least one cell in a combined transmission area composed of multiple cells and the multicast service , Where each cell in the plurality of cells transmits the multicast service with the same transmission parameter; the processor 810 is used to determine the cell managed by the distributed control node according to the second configuration information; The transceiver 820 is also used to send the multicast service to the terminal device in the managed cell
  • the apparatus 800 may be specifically a distributed control node in the foregoing embodiments, and may be used to execute various steps and / or processes corresponding to the distributed control node in the foregoing method embodiments.
  • the memory 830 may include a read-only memory and a random access memory, and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory.
  • the memory may also store device type information.
  • the processor 810 may be used to execute the instructions stored in the memory, and when the processor 810 executes the instructions stored in the memory, the processor 810 is used to execute the various steps of the method embodiments corresponding to the distributed control node described above and / Or process.
  • the processor of the above device may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and application-specific integrated circuits. (ASIC), field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processor or instructions in the form of software.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware processor, or may be executed and completed by a combination of hardware and software units in the processor.
  • the software unit may be located in a mature storage medium in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, and a register.
  • the storage medium is located in the memory, and the processor executes the instructions in the memory and completes the steps of the above method in combination with its hardware. In order to avoid repetition, they will not be described in detail here.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • “And / or” describes the relationship of related objects, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists alone, A and B exist at the same time, B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the related object is a "or” relationship.
  • “At least one of the following” or a similar expression refers to any combination of these items, including any combination of a single item or a plurality of items.
  • At least one item (a) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c may be single or multiple.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a division of logical functions.
  • there may be other divisions for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product, the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program codes .

Abstract

La présente invention concerne un procédé et un appareil de transmission d'un service de multidiffusion. Le procédé comprend les étapes au cours desquelles : un dispositif de réseau détermine de multiples cellules à titre de zone de transmission combinée, la zone de transmission combinée étant utilisée pour transmettre un service de multidiffusion et un paramètre de transmission de chaque cellule faisant partie des multiples cellules de transmission du service de multidiffusion étant identique ; le dispositif de réseau envoie des premières informations de configuration à un dispositif terminal, les premières informations de configuration étant utilisées pour indiquer le paramètre de transmission et un identifiant du service de multidiffusion ; et le dispositif de réseau envoie le service de multidiffusion au dispositif terminal dans au moins une cellule dans la zone de transmission combinée en fonction du paramètre de transmission. Le dispositif de réseau peut envoyer le même service de multidiffusion dans une ou plusieurs cellules à un dispositif terminal. La qualité de réception des services de multidiffusion par le dispositif terminal s'en trouve améliorée, ainsi que les performances de transmission.
PCT/CN2018/112629 2018-10-30 2018-10-30 Procédé et appareil de transmission d'un service de multidiffusion WO2020087263A1 (fr)

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