WO2018028062A1 - 组播业务传输方法、终端、基站和通信系统 - Google Patents

组播业务传输方法、终端、基站和通信系统 Download PDF

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Publication number
WO2018028062A1
WO2018028062A1 PCT/CN2016/104768 CN2016104768W WO2018028062A1 WO 2018028062 A1 WO2018028062 A1 WO 2018028062A1 CN 2016104768 W CN2016104768 W CN 2016104768W WO 2018028062 A1 WO2018028062 A1 WO 2018028062A1
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Prior art keywords
multicast service
service data
terminal
base station
indication information
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PCT/CN2016/104768
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English (en)
French (fr)
Inventor
沈兴亚
花梦
铁晓磊
周涵
汲桐
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华为技术有限公司
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Priority to CN201680088281.8A priority Critical patent/CN109565645B/zh
Publication of WO2018028062A1 publication Critical patent/WO2018028062A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor

Definitions

  • the embodiments of the present invention relate to communication technologies, and in particular, to a multicast service transmission method, a terminal, a base station, and a communication system.
  • NB-IoT Narrow Band Internet of Things
  • LTE Long Term Evolution
  • the Narrow Band Internet of Things (NB-IoT) deployed in the Long Term Evolution (LTE) system is a branch of the Internet of Everything. It has a wide coverage, many connections, and low speed. Low cost, low power consumption, and excellent architecture. Therefore, NB-IoT can provide support for massive IoT terminals with low throughput, cost and energy consumption.
  • the terminal referred to here may be, for example, a smart meter, a smart water meter, a smart parking device, or the like.
  • the base station in the NB-IoT can send the multicast service data sent by the core network device by using a single cell to single-point (Single Cell Point to Multiple) (SC-PTM) multicast technology. Give all terminals within the coverage of the cell.
  • the multicast service corresponding to the multicast service data may be, for example, a software upgrade service or an emergency notification service in an area.
  • the base station may first map the multicast service data to multiple transport blocks according to the size of the transport block, and then sequentially transmit each transport block to all terminals of the cell to transmit the multicast service data to the terminal. the goal of.
  • the base station transmits the multicast service data to the terminal to enhance the robustness of the multicast service is an urgent problem to be solved. .
  • the embodiments of the present invention provide a multicast service transmission method, a terminal, a base station, and a communication system, which are used to enhance the robustness of a multicast service.
  • an embodiment of the present invention provides a multicast service transmission method, including: receiving a core The multicast service data sent by the network device; the transmission indication information of the multicast service; the transmission indication information includes: a transmission mode of the multicast service data, and a number of transmissions; and the transmission indication information is sent to the terminal, And transmitting the multicast service data to the terminal according to the transmission indication information.
  • the multicast service transmission method provided by the first aspect after receiving the multicast service data sent by the core network device, the base station may obtain a transmission mode including the multicast service data, and transmission indication information of the number of transmissions, so that The base station may transmit the multicast service data to the terminal multiple times according to the transmission indication information, and the base station may further send the transmission indication information to the terminal, so that the terminal can correctly send the base station multiple times according to the transmission indication information.
  • Multicast service data can increase the probability of the terminal successfully receiving the multicast service data by increasing the number of times the multicast service data is transmitted when the data volume of the multicast service data is large. The robustness of the multicast service.
  • the foregoing multicast service data includes: multiple multicast service data units, each of the multicast service data units includes at least one multicast service data packet; The number of multicast service data units included in the multicast service data is determined by a base station.
  • the transmission mode of the multicast service data is: transmitting the group to the terminal by using all data of the multicast service data as a repeated transmission unit. And transmitting the multicast service data to the terminal according to the transmission indication information, including: according to the number of transmissions, using all data of the multicast service data as a repeated transmission unit, to the The terminal repeatedly transmits the multicast service data.
  • the transmission mode of the multicast service data is: transmitting the multicast service to the terminal by using the multicast service data unit as a repeated transmission unit. Transmitting the multicast service data to the terminal according to the transmission indication information, including: repeating, according to the number of transmissions, the multicast service data unit as a repeated transmission unit to the terminal Multicast service data.
  • the transmission mode of the multicast service data is: transmitting the multicast service to the terminal by using the multicast service data packet as a repeated transmission unit. Transmitting the multicast service data to the terminal according to the transmission indication information, including: according to the number of transmissions, using the multicast service data packet as a repeated transmission unit, to the The terminal repeatedly transmits the multicast service data.
  • the acquiring the indication information of the multicast service includes: a service type according to the multicast service data, and a preset service type. And determining, by the mapping relationship between the indication information, the transmission indication information of the multicast service.
  • the acquiring the indication information of the multicast service includes: receiving, by the core network device, transmission indication information of the multicast service.
  • the method further includes: sending, to the terminal, multicast service notification information, where the multicast service notification information is used to indicate the Number of multicast service packets for multicast service data.
  • the base station may send the multicast service notification information to the terminal, so that after receiving the multicast service notification information, the terminal may receive the multicast service successfully received by the terminal.
  • the number of data packets is used to determine whether all the multicast service data packets of the multicast service data have been received, and thus the terminal can ensure that the terminal can correctly and completely receive the multicast service data, thereby improving the successful reception of the terminal.
  • the probability of multicast service data enhances the robustness of multicast services.
  • the method before the sending the multicast service data to the terminal according to the transmission indication information, the method further includes: according to the multicast service data packet The first indication information is generated for the multicast service data packet of the multicast service data, where the first indication information is used to indicate the identifier of the multicast service data packet to the terminal; The transmitting the indication information to the terminal to send the multicast service data, including: sending the first indication information and the multicast service indicated by the first indication information to the terminal according to the transmission indication information data pack.
  • the base station may generate, for each multicast service data packet, a first indication information for indicating the identifier of the multicast service data packet, and according to the transmission indication information
  • the first indication information is sent to the terminal together with the multicast service data packet, so that the terminal can determine, according to the first indication information, whether the multicast service data packet has been successfully received, and If it is determined that the multicast service data packet is not successfully received, the multicast service data packet sent by the base station is continued to be received, and the group is successfully received.
  • the terminal can ignore the multicast service data packet transmitted by the base station without any processing. In this way, the terminal can be prevented from repeatedly receiving the multicast service data packet that has been successfully received, thereby reducing the overhead of the terminal.
  • the embodiment of the present invention provides a multicast service transmission method, including: receiving transmission indication information sent by a base station; the transmission indication information includes: a transmission mode of the multicast service data, and a transmission number; The transmission indication information receives the multicast service data transmitted by the base station.
  • the terminal may receive the transmission indication information sent by the base station, so that the terminal can correctly receive the multicast service data that the base station transmits to the terminal multiple times according to the transmission indication information. Therefore, the multicast service transmission method provided by the embodiment of the present invention can increase the probability of the terminal successfully receiving the multicast service data by increasing the number of times the multicast service data is transmitted when the data volume of the multicast service data is large. The robustness of the multicast service.
  • the multicast service data includes: multiple multicast service data units, each of the multicast service data units includes at least one multicast service data packet.
  • the number of multicast service data units included in the multicast service data is determined by the base station.
  • the transmission mode of the multicast service data is: receiving, by using the entire data of the multicast service data, a repeat transmission unit to receive the Receiving the multicast service data, the receiving, according to the transmission indication information, the multicast service data that is transmitted by the base station, including: according to the number of transmissions, using all data of the multicast service data as a repeated transmission unit, Receiving, by the base station, the multicast service data that is repeatedly transmitted.
  • the transmission mode of the multicast service data is: receiving, by the multicast service data unit, the multicast transmitted by the base station as a repeated transmission unit.
  • Receiving the multicast service data that is transmitted by the base station according to the transmission indication information including: receiving, according to the number of transmissions, the multicast service data unit as a repeated transmission unit, and receiving the base station The multicast service data that is repeatedly transmitted.
  • the transmission mode of the multicast service data is: receiving the multicast transmitted by the base station by using the multicast service data packet as a repeated transmission unit. Receiving the multicast service data that is transmitted by the base station according to the transmission indication information, including: using the multicast service data packet as a repeated transmission list according to the number of transmissions And receiving the multicast service data that is repeatedly transmitted by the base station.
  • the method further includes: receiving, by the base station, multicast service notification information, where the multicast service notification information is used to indicate the multicast service The number of multicast service packets of data.
  • the terminal can receive the multicast service notification information sent by the base station, so that the terminal can determine whether the multicast service data packet is successfully received according to the number of the multicast service data packets it has successfully received. After receiving all the multicast service data packets of the multicast service data, the terminal can ensure that the terminal can correctly and completely receive the multicast service data, thereby improving the probability that the terminal successfully receives the multicast service data, and the enhanced Robustness of multicast services.
  • the receiving the multicast service data that is sent by the base station according to the transmission indication information including: receiving, according to the transmission indication information, The first indication information sent by the base station, where the first indication information is used to indicate the identifier of the multicast service data packet; the first indication information is the number of the base station according to the multicast service data packet.
  • the indication information generated by the multicast service data packet of the multicast service data determining, according to the first indication information, whether the multicast service data packet corresponding to the identifier of the multicast service data packet has been successfully received And determining, according to the transmission indication information, continuing to receive the identifier of the multicast service data packet sent by the base station, when determining that the multicast service data packet indicated by the identifier of the multicast service data packet is not successfully received.
  • Multicast service packets
  • the terminal may receive, according to the transmission indication information, the first indication information that is generated by the base station for indicating the identifier of the multicast service data packet for each multicast service data packet, Therefore, the terminal may determine, according to the first indication information, whether the multicast service data packet has been successfully received, and continue to receive the multicast service data packet sent by the base station after determining that the multicast service data packet is not successfully received.
  • the terminal may ignore the multicast service data packet transmitted by the base station, and do not perform any processing. In this way, the terminal can be prevented from repeatedly receiving the multicast service data packet that has been successfully received, thereby reducing the overhead of the terminal.
  • the method further includes: determining success And receiving an identifier of the multicast service data packet when receiving the multicast service data packet corresponding to the identifier of the multicast service data packet.
  • the terminal may record the identifier of the multicast service data packet after determining the multicast service data packet corresponding to the identifier of the multicast service data packet sent by the base station. After the terminal receives the first indication information that is generated by the base station for indicating the identifier of the multicast service data packet for each multicast service data packet, the terminal may receive the successfully received multicast service data packet according to the record thereof.
  • the multicast service data packet sent by the base station is continued to be received, and the terminal can ignore the multicast service transmitted by the base station when determining that the multicast service data packet corresponding to the multicast service data packet identifier has been successfully received.
  • the packet is not processed. In this way, the terminal can be prevented from repeatedly receiving the multicast service data packet that has been successfully received, thereby reducing the overhead of the terminal.
  • the determining, according to the first indication information, whether the multicast service data packet corresponding to the identifier of the multicast service data packet has been successfully received includes: determining whether the identifier of the multicast service data packet includes the identifier of the multicast service data packet, and if the identifier of the recorded multicast service data packet does not include the identifier of the multicast service data packet And determining that the multicast service data packet corresponding to the identifier of the multicast service data packet is not successfully received.
  • an embodiment of the present invention provides a base station, where the base station includes:
  • a receiver configured to receive multicast service data sent by the core network device, and a processor, configured to acquire transmission indication information of the multicast service, where the transmission indication information includes: a transmission mode of the multicast service data, and Transmitting, the transmitter is configured to send the transmission indication information to the terminal, and transmit the multicast service data to the terminal according to the transmission indication information.
  • the receiver of the base station may acquire a transmission mode including the multicast service data, and transmission indication information of the number of transmissions
  • the transmitter of the base station can transmit the multicast service data to the terminal multiple times according to the transmission indication information, and the transmitter of the base station can also send the transmission indication information to the terminal, so that the terminal can according to the transmission indication information.
  • the multicast service data includes: multiple multicast service data units, each of the multicast service data units includes at least one multicast service data packet.
  • the number of multicast service data units included in the multicast service data is determined by the base station.
  • the transmission mode of the multicast service data is: transmitting, by using all data of the multicast service data as a repeated transmission unit, to the terminal
  • the transmitter is specifically configured to repeatedly transmit the multicast service data to the terminal according to the number of transmissions, using all data of the multicast service data as a repeated transmission unit.
  • the transmission mode of the multicast service data is: transmitting the multicast to the terminal by using the multicast service data unit as a repeated transmission unit.
  • the transmitter is specifically configured to repeatedly transmit the multicast service data to the terminal according to the number of transmissions, using the multicast service data unit as a repeat transmission unit.
  • the transmission mode of the multicast service data is: transmitting the multicast to the terminal by using the multicast service data packet as a repeated transmission unit.
  • the transmitter is specifically configured to repeatedly transmit the multicast service data to the terminal according to the number of transmissions, using the multicast service data packet as a repeated transmission unit.
  • the processor is specifically configured to: according to a service type of the multicast service data, and between a preset service type and a transmission indication information Mapping the relationship, determining transmission indication information of the multicast service.
  • the processor is configured to control, by the receiver, the transmission indication information of the multicast service that is sent by the core network device.
  • the transmitter is further configured to send, to the terminal, multicast service notification information, where the multicast service notification information is used to indicate to the terminal The number of multicast service data packets of the multicast service data.
  • the transmitter of the base station may further send the multicast service notification information to the terminal, so that after receiving the multicast service notification information, the terminal may receive the multicast service successfully received by the terminal.
  • the number of data packets is used to determine whether all the multicast service data packets of the multicast service data have been received, and thus the terminal can ensure that the terminal can correctly and completely receive the multicast service data, thereby improving the successful reception of the terminal.
  • the probability of multicast service data increases The robustness of the multicast service is enhanced.
  • the processor is further configured to: before the transmitter sends the multicast service data to the terminal according to the transmission indication information, according to Generating the first indication information for the multicast service data packet of the multicast service data, where the first indication information is used to indicate the multicast service to the terminal.
  • the identifier of the data packet is specifically configured to send, according to the transmission indication information, the first indication information and the multicast service data packet indicated by the first indication information to the terminal.
  • the processor of the base station may generate, for each multicast service data packet, a first indication information indicating the identifier of the multicast service data packet, so that the transmitter of the base station transmits according to the transmission.
  • the first indication information is sent to the terminal together with the multicast service data packet, so that the terminal can determine whether the multicast service data has been successfully received according to the first indication information.
  • Packet and when it is determined that the multicast service data packet is not successfully received, will continue to receive the multicast service data packet sent by the base station's transmitter, and determine the group corresponding to the successful reception of the multicast service data packet identifier.
  • the terminal can ignore the multicast service data packet transmitted by the base station without any processing. In this way, the terminal can be prevented from repeatedly receiving the multicast service data packet that has been successfully received, thereby reducing the overhead of the terminal.
  • an embodiment of the present invention provides a terminal, where the terminal includes:
  • a receiver configured to receive the transmission indication information sent by the base station, where the processor is configured to: according to the transmission indication information, control the receiver to receive the multicast service data that is sent by the base station; The transmission mode of the multicast service data, and the number of transmissions.
  • the receiver of the terminal can receive the transmission indication information sent by the base station, so that the processor of the terminal can correctly control the receiver to receive the multicast service that the base station transmits to the terminal multiple times according to the transmission indication information. data. Therefore, when the amount of data of the multicast service data is large, the number of times the multicast service data is transmitted is increased, the probability that the terminal successfully receives the multicast service data is improved, and the robustness of the multicast service is enhanced.
  • the multicast service data includes: multiple multicast service data units, each of the multicast service data units includes at least one multicast service data packet.
  • the number of multicast service data units included in the multicast service data is determined by the base station.
  • the transmission mode is: when the all the data of the multicast service data is received by the base station as the repeating transmission unit, the processor is specifically configured to use the number of transmissions according to the number of transmissions. All data of the multicast service data is a repeated transmission unit, and the receiver is controlled to receive the multicast service data repeatedly transmitted by the base station.
  • the transmission mode of the multicast service data is: receiving the group that is transmitted by the base station by using the multicast service data unit as a repeated transmission unit.
  • the processor is specifically configured to control, according to the number of transmissions, the multicast service data unit as a repeated transmission unit, to receive the multicast that is repeatedly transmitted by the base station by the receiver.
  • Business data is specifically configured to control, according to the number of transmissions, the multicast service data unit as a repeated transmission unit, to receive the multicast that is repeatedly transmitted by the base station by the receiver.
  • the transmission mode of the multicast service data is: receiving the group that is transmitted by the base station by using the multicast service data packet as a repeated transmission unit.
  • the processor is specifically configured to control, according to the number of transmissions, the multicast service data packet as a repeat transmission unit, to receive, by the receiver, the multicast that is repeatedly transmitted by the base station.
  • Business data is specifically configured to control, according to the number of transmissions, the multicast service data packet as a repeat transmission unit, to receive, by the receiver, the multicast that is repeatedly transmitted by the base station.
  • the receiver is further configured to receive multicast service notification information sent by the base station, where the multicast service notification information is used to be sent to the terminal The number of multicast service data packets indicating the multicast service data.
  • the receiver of the terminal can receive the multicast service notification information sent by the base station, so that the processor of the terminal can judge according to the number of multicast service data packets successfully received by the terminal. Whether all the multicast service data packets of the multicast service data have been received, and thus the terminal can ensure that the terminal can receive the multicast service data correctly and completely, thereby improving the probability that the terminal successfully receives the multicast service data.
  • the robustness of the multicast service is enhanced.
  • the processor is configured to, according to the transmission indication information, control the receiver to receive the first indication information sent by the base station, and according to the Determining, by the first indication information, whether the multicast service data packet corresponding to the identifier of the multicast service data packet has been successfully received, and determining that the multicast service indicated by the identifier of the multicast service data packet is not successfully received And controlling, according to the transmission indication information, the receiver to continue to receive the multicast service data packet corresponding to the identifier of the multicast service data packet sent by the base station, where the first indication information is used by the receiver Instructing the identifier of the multicast service data packet;
  • the first indication information is indication information generated by the base station for the multicast service data packet of the multicast service data according to the number of the multicast service data packets.
  • the processor of the terminal may receive, according to the transmission indication information, first indication information that is generated by the base station for indicating the identifier of the multicast service data packet for each multicast service data packet, thereby The processor of the terminal may determine, according to the first indication information, whether the multicast service data packet has been successfully received, and continue to receive the multicast service sent by the base station after determining that the multicast service data packet is not successfully received.
  • the data packet when determining that the multicast service data packet corresponding to the multicast service data packet identifier has been successfully received, the processor of the terminal can ignore the multicast service data packet transmitted by the base station without any processing. In this way, the terminal can be prevented from repeatedly receiving the multicast service data packet that has been successfully received, thereby reducing the overhead of the terminal.
  • the processor is further configured to: control, by the receiver, the group corresponding to the identifier of the multicast service data packet sent by the base station After the service data packet is broadcast, the identifier of the multicast service data packet is recorded when it is determined that the multicast service data packet corresponding to the identifier of the multicast service data packet is successfully received.
  • the processor of the terminal may record the identifier of the multicast service data packet after determining that the multicast service data packet corresponding to the identifier of the multicast service data packet sent by the base station is successfully received, After the processor of the terminal receives the first indication information generated by the base station for indicating the identifier of the multicast service data packet generated by the base station for each multicast service data packet, the processor according to the record may be successfully received.
  • the receiver continues to receive the multicast service data packet sent by the base station, and when determining that the multicast service data packet corresponding to the multicast service data packet identifier has been successfully received, the terminal can The multicast service data packet transmitted by the base station is ignored, and no processing is performed. In this way, the terminal can be prevented from repeatedly receiving the multicast service data packet that has been successfully received, thereby reducing the overhead of the terminal.
  • the processor is configured to determine, according to the first indication information, a multicast service data packet corresponding to the identifier of the multicast service data packet. Whether it has been successfully received, specifically: the processor is specifically configured to determine whether the identifier of the recorded multicast service data packet includes the identifier of the multicast service data packet, and determine the recorded multicast service When the identifier of the multicast service data packet is not included in the identifier of the data packet, the determination is not completed. The work receives the multicast service data packet corresponding to the identifier of the multicast service data packet.
  • an embodiment of the present invention provides a communication system, where the communication system includes: the base station provided by the foregoing third aspect and the possible implementation manners of the third aspect, and the fourth aspect and the fourth aspect Terminals provided by each of the possible embodiments.
  • the base station may obtain a transmission mode including the multicast service data, and transmission indication information of the number of transmissions, so that the base station can
  • the transmission indication information is that the multicast service data is transmitted to the terminal multiple times
  • the base station may also send the transmission indication information to the terminal, so that the terminal can correctly receive the multicast service sent by the base station multiple times according to the transmission indication information. data. Therefore, the multicast service transmission method provided by the embodiment of the present invention can increase the probability of the terminal successfully receiving the multicast service data by increasing the number of times the multicast service data is transmitted when the data volume of the multicast service data is large. The robustness of the multicast service.
  • the multicast service transmission method, the terminal, the base station, and the communication system provided by the embodiment of the present invention after receiving the multicast service data sent by the core network device, the base station may acquire the transmission mode including the multicast service data, and the number of transmissions. Transmitting the indication information, so that the base station can transmit the multicast service data to the terminal multiple times according to the transmission indication information, and the base station can also send the transmission indication information to the terminal, so that the terminal can correctly according to the transmission indication information. Receiving multicast service data sent by the base station multiple times.
  • the multicast service transmission method provided by the embodiment of the present invention can increase the probability of the terminal successfully receiving the multicast service data by increasing the number of times the multicast service data is transmitted when the data volume of the multicast service data is large, and the enhanced Robustness of multicast services.
  • FIG. 1 is a flowchart of signaling interaction of a multicast service transmission method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a multicast service data according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of another multicast service data according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of still another multicast service data according to an embodiment of the present disclosure.
  • FIG. 5 is a flowchart of signaling interaction of another multicast service transmission method according to an embodiment of the present disclosure
  • FIG. 6 is a flowchart of signaling interaction of a third embodiment of a multicast service transmission method according to an embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 9 is a structural block diagram of a terminal when the terminal is a mobile phone according to an embodiment of the present invention.
  • the terminal involved in the embodiment of the present invention may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem.
  • the wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal.
  • RAN Radio Access Network
  • RAN Radio Access Network
  • it may be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with a wireless access network.
  • a wireless terminal may also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, or an access point.
  • Remote Terminal Access Terminal, User Terminal, User Agent
  • the user equipment (User Device) or the user equipment (User Equipment) in the embodiment of the present invention may also be a smart meter, a smart water meter or the like in the NB-IoT.
  • a base station may refer to a device in an access network that communicates with a wireless terminal through one or more sectors on an air interface.
  • the base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the embodiment of the invention is not limited.
  • the multicast service transmission method provided by the embodiment of the present invention can be applied to a base station and a terminal in an NB-IoT deployed on any communication system.
  • the communication referred to here may be, for example, a 2G communication system, a 3G communication system, an LTE communication system, a 5G communication system, or the like.
  • the base station may first split the service data into multiple layers at the network layer. Packet Data Convergence Protocol (PDCP) Service Data Unit (SDU) packet, and then according to the size of the Transport Block (TB), each layer in the physical layer The PDCP SDU packet is mapped to multiple TBs, so that the base station can multicast the multicast service data to the terminal at the physical layer by multicasting each TB to all terminals interested in the multicast service data in the cell.
  • PDCP Packet Data Convergence Protocol
  • SDU Service Data Unit
  • TB Transport Block
  • the maximum PDCP SDU packet supported by the base station can carry 1.5 kB, and the maximum TB supported by the NB-IoT base station is 680 bits. If the amount of data of a certain multicast service data that the base station multicasts to the terminal is large, 200 kB is taken as an example. At this time, the base station splits the multicast service data even if the maximum PDCP SDU packet is used, and the maximum TB mapping is used. For each PDCP SDU packet, each PDCP SDU packet will still be mapped to approximately 20 TB.
  • the base station transmits each PDCP SDU of the software upgrade service to the terminal at 20 TB, the probability of at least one of the 20 TBs received by the terminal is about 87%. Therefore, for the terminal, PDCP The probability of receiving the SDU packet failure is large, and the probability of receiving the multicast service data failure is large. Therefore, when the base station transmits the multicast service data to the terminal, how to repeatedly transmit the multicast service data to the terminal so that the terminal can successfully receive the multicast service data is an urgent problem to be solved.
  • the multicast service transmission method provided by the embodiment of the present invention is to solve the problem of how the base station transmits multicast service data to the terminal to enhance the robustness of the multicast service when the data volume of the multicast service data is large. technical problem.
  • the following application documents illustrate the multicast service transmission method provided by the embodiment of the present invention by using the NB-IoT base station and the terminal in the LTE system as an example.
  • the present invention is implemented.
  • the method for transmitting a multicast service including but not limited to the foregoing application scenarios and devices, may be implemented by using the multicast service transmission method provided by the embodiment of the present invention as long as the scenario and device for transmitting the multicast service data are involved.
  • FIG. 1 is a flowchart of signaling interaction of a multicast service transmission method according to an embodiment of the present invention.
  • the first embodiment relates to a specific process for the base station to transmit multicast service data to the terminal according to the obtained transmission indication information of the multicast service.
  • the method includes:
  • the base station receives the multicast service data sent by the core network device.
  • the base station can receive the multicast service data sent by the core network device.
  • the multicast service data may be multicast service data with a large amount of data, for example, a software upgrade service or an emergency notification service.
  • the core network device may be an application server, a core network server gateway, a mobility management entity, or the like.
  • the base station acquires transmission indication information of the multicast service.
  • the base station may acquire a transmission mode including the multicast service data, and transmission indication information of the number of transmissions.
  • the transmission mode of the multicast service data is used to indicate which retransmission unit used by the base station repeatedly transmits the multicast service data to the terminal.
  • the repeating transmission unit mentioned herein may be, for example, a transport block (TB), or a whole multicast service data (Multicast Session), or a segment of a plurality of TBs. It can also be a combination of any two of the above, or a combination of all three, and can be set according to requirements.
  • the number of transmissions of the above multicast service data is used to indicate that the base station transmits each repeated transmission unit to the terminal several times on the transmission channel.
  • the transport channel mentioned here can be, for example, a single cell multicast service transmission.
  • SC-MTCH Single Cell–Multicast Transport Channel
  • the manner in which the base station acquires the transmission indication information of the multicast service is not limited.
  • the base station may determine, according to a mapping relationship between the preset service type and the transmission indication information, and a service type of the multicast service data. The transmission indication information of the multicast service.
  • the base station may further obtain the transmission indication information of the multicast service according to the related information of the multicast service data.
  • the related information mentioned here may be the data size of the multicast service data, the channel condition of the terminal involved in the multicast service data, and the coverage level distribution of the user. For example, if the channel conditions of the terminal involved in the multicast service data are good, and the coverage level of the user is mainly distributed at a good coverage level, the value of the number of transmissions in the transmission indication information of the multicast service is small. If the channel conditions of the terminal involved in the multicast service data are poor, and the coverage level of the user is mainly distributed on a poor coverage level, the value of the number of transmissions in the transmission indication information of the multicast service is large.
  • the base station may determine the channel condition and the number of transmissions in the historical multicast service data statistics and/or the historical multicast service data experience data, and/or the coverage level and the number of transmission times. If the data volume of the multicast service data is small, the repeated transmission unit in the transmission indication information of the multicast service may be a transmission unit with a small amount of data; if the data volume of the multicast service data is large, the multicast The repeated transmission unit in the transmission indication information of the service may be a transmission unit with a large amount of data.
  • the repeated transmission unit in the transmission indication information of the multicast service may be one data. If the channel conditions of the terminal involved in the multicast service data are poor, and the coverage level of the user is mainly distributed on the poor coverage level, the repeated transmission unit in the transmission indication information of the multicast service may be It is a transmission unit with a large amount of data.
  • the base station may obtain the transmission indication information of the multicast service by receiving the transmission indication information of the multicast service sent by the core network device. Wait.
  • the base station sends the transmission indication information to the terminal.
  • the base station may send the transmission indication information to the terminal that receives the multicast service data, so that the terminal learns, by using the transmission indication information, what retransmission the base station will use.
  • the unit transmits the multicast service data to the terminal, and the base station transmits several times when repeatedly transmitting each repeated transmission unit.
  • the embodiment does not limit the manner in which the base station sends the transmission indication information to the terminal.
  • the foregoing base station may send the transmission indication information to the terminal separately, and may also carry the transmission indication information in a control channel and send the information to the terminal or the like.
  • the control channel mentioned here may be, for example, a Single Cell-Multicast Control Channel (SC-MCCH), or may be a Physical Downlink Control Channel (PDCCH), or may be System Information Block (SIB).
  • SC-MCCH Single Cell-Multicast Control Channel
  • PDCH Physical Downlink Control Channel
  • SIB System Information Block
  • the foregoing transmission information is carried in the SC-MCCH and sent to the terminal.
  • the base station may send the transmission indication information to the terminal in the MTCH list on the SC-MCCH, where the transmission indication is carried.
  • the MTCH list of information can be, for example, as follows:
  • the repetition factor in the foregoing high-level signaling is the transmission time in the transmission indication information. number.
  • the value of the number of transmissions may be, for example, a positive integer between 1 and 8.
  • the repetition mode in the high-level signaling is the repeated transmission unit in the transmission indication information. For example, when the value of the repetition mode is 1, the repeat transmission unit is TB, and when the value of the repetition mode is 2, The repeat transmission unit is the entire multicast service data (Multicast Session). When the value of the repetition mode is 3, it indicates that the repeated transmission unit is a segment in which a plurality of TBs are cascaded.
  • the mbmsSessionInfo-r13 in the high-level signaling indicates the identifier of the multicast service data being transmitted.
  • the g-RNTI-r13 in the above high layer signaling indicates the RNTI identifier used by the physical layer to scramble the multicast service data (SC-MTCH).
  • the sc-mtch-schedulingInfo-r13 in the high-level signaling indicates the discontinuous reception (DRX) information related to the multicast service data.
  • the sc-mtch-neighbourCell-r13 in the above high layer signaling indicates a neighboring cell that is transmitting multicast service data.
  • the foregoing MTCH list may include two repetition factors, one of which is used to indicate the number of transmissions in the transmission indication information of the multicast service according to the present invention, and the other is used to indicate the physical layer transmission block in the prior art. The number of times of repeated transmission, etc.
  • all the multicast service data (ie, all MTCHs) indicated by the SC-MCCH may share the same transmission indication information, that is, the SC-MCCH corresponding to the SC-MCCH.
  • the repeat transmission mode and the number of repeated transmissions of all multicast service data are the same.
  • the MTCH list in the SC-MCCH can be, for example, as follows:
  • the foregoing MCCH list may include two repetition factors, one of which is used to indicate the number of transmissions in the transmission indication information of the multicast service according to the present invention, and the other is used to indicate the physical layer transmission block in the prior art. The number of times of repeated transmission, etc.
  • the SIB carrying the transmission indication information may be as follows:
  • the foregoing SIB may include two repetition factors, one of which is used to indicate the number of transmissions of the multicast service data, and the other is used to indicate the number of times the physical layer transports the block to be repeatedly transmitted.
  • the repeating factor in the transmission indication information is carried in the PDCCH and sent to the terminal.
  • the base station may carry the downlink control information of the PDCCH (Downlink Control Information, referred to as: DCI) Medium.
  • DCI Downlink Control Information
  • the repetition factor here includes the two repetition factors mentioned above, namely the repetition factor of the multicast service data level and the repetition factor of the physical transport block level.
  • the terminal receives the transmission indication information.
  • the base station transmits the multicast service data to the terminal according to the transmission indication information.
  • the base station may repeatedly transmit the group to the terminal according to the repeated transmission unit indicated by the multicast service data transmission mode according to the number of transmissions included in the foregoing transmission indication information.
  • Broadcast service data that is, the base station repeatedly transmits each repeated transmission unit to the terminal in turn according to the number of transmissions.
  • the base station compares the amount of data included in the repeated transmission unit and the number of TBs of the data amount mapping in each transmission transmission unit according to the number of transmissions, so as to ensure that the base station repeatedly transmits the same repetition. Transmission unit.
  • the radio resource link control (RLC) entity of the base station transmits a radio resource link control service data unit (SDU) to the service data unit (SDU).
  • the lower layer is one or more times.
  • the lower layer may be a medium access control layer (MAC) in the LTE protocol; the number of repeated transmissions is as described above, and may be indicated by a physical layer downlink control information or a parameter in a system message (SIB).
  • the radio resource link control entity at the transmitter end of the base station processes a radio resource link control service data unit (RLC SDU) into a protocol data unit (UMD PDU, Unacknowledged Mode Data Protocol Data Unit) in the following manner. :
  • Step 1 The Radio Resource Link Control (RLC) entity segments and/or reassembles the RLC SDUs into one or more UMD PDUs such that the size of each UMD PDU is adapted to the size of the RLC PDU indicated by the medium access control layer.
  • RLC Radio Resource Link Control
  • Step 2 The RLC entity adds a corresponding RLC header to each UMD PDU.
  • the RLC entity processes one or more Radio Resource Link Control Service Data Units (RLC SDUs) into one or more Radio Resource Link Control Protocol Data Units (RLC) PDU).
  • RLC SDUs Radio Resource Link Control Service Data Units
  • RLC PDU Radio Resource Link Control Protocol Data Units
  • the above steps may be reversed in sequence when the RLC entity processes the RLC SDU.
  • the RLC segments/reassembles the RLC SDU into one or more UMD PDUs according to the segmentation/reassembly manner when the RLC SDU is initially transmitted.
  • the transmitter RLC entity needs to sequentially add the sequence numbers to the UMD PDUs.
  • the specific operation manner is as follows:
  • Step 1 Set the sequence number (SN, Sequence Number) of the UMD PDU to the parameter VT (US), and add one to the parameter VT (US);
  • Step 2 store the serial number corresponding to each UMD PDU and the value of the corresponding parameter VT (US);
  • the transmitter RLC entity needs to operate as follows:
  • the RLC entity sets the sequence number (SN, Sequence Number) of the UMD PDU to the parameter VT (US), and the parameter VT (US) is incremented by one.
  • the serial number is equal to the corresponding serial number stored by the previous transmitter.
  • the segmentation and/or reassembly manner of the RLC SDU is consistent, and the sequence numbers of the corresponding UMD PDUs of each initial transmission and retransmission are consistent.
  • the terminal receives the multicast service data transmitted by the base station according to the transmission indication information.
  • the terminal may transmit the multicast service data to the terminal according to the number of transmissions included in the transmission indication information, and the repeated transmission unit indicated in the transmission mode.
  • the correct reception of the multicast service data repeatedly transmitted by the base station can prevent the terminal from considering the multicast service data repeatedly transmitted by the base station as the new multicast service data.
  • the multicast service transmission method provided by the embodiment of the present invention after receiving the multicast service data sent by the core network device, the base station may acquire the transmission mode including the multicast service data, and the transmission indication information of the transmission times, so that The base station may transmit the multicast service data to the terminal multiple times according to the transmission indication information, and the base station may further send the transmission indication information to the terminal, so that the terminal can correctly send the base station multiple times according to the transmission indication information.
  • Multicast service data can improve the terminal successfully receiving multicast by increasing the number of times of multicast service data transmission when the amount of data of the multicast service data is large.
  • the probability of service data enhances the robustness of multicast services.
  • the multicast service data received by the base station may include: multiple multicast service data units (ie, PDCP SDU packets), and each multicast service data unit includes at least one multicast.
  • Business data package may be a minimum unit for the base station to split the multicast service data at the network layer.
  • the multicast service data packet included in each of the foregoing multicast service data units may be a TB or a segment, and may be set according to user requirements.
  • the segment may be a unit that is greater than or equal to one TB and less than or equal to one PDCP SDU packet, for example, two cascaded TBs, etc., and may be specifically determined by a base station and/or a high layer configuration.
  • the number of the foregoing multicast service data units may be determined by the base station.
  • the base station may determine the number of multicast service data units of the multicast service data according to the amount of data carried by the preset multicast service data unit and the data volume of the multicast service data.
  • the base station may further determine the multicast service data of the multicast service data according to the mapping relationship between the preset service type and the amount of data carried by the multicast service data unit, and the service type of the multicast service data. The number of units.
  • the base station may further determine, according to the preset data volume of the multicast service data, the amount of data carried by the multicast service data unit, and the data volume of the multicast service data, the multicast service of the multicast service data.
  • the number of data units can be determined according to the needs of users.
  • the embodiment relates to a specific process for the base station to transmit multicast service data to the terminal according to the transmission indication information.
  • the above S105 can be specifically divided into the following cases:
  • the transmission mode of the multicast service data is: the base station transmits the multicast service data to the terminal by using all the data of the multicast service data as a repeated transmission unit.
  • the foregoing S105 may include: the base station repeatedly transmits the multicast service data to the terminal according to the number of transmissions, using all the data of the multicast service data as a repeated transmission unit.
  • the base station when the base station repeatedly transmits the multicast service data to the terminal according to the transmission mode in which the multicast data is transmitted to the terminal by using all the data of the multicast service data as the repeated transmission unit, the base station may use all the multicast service data.
  • the data is repeated transmission of the multicast service data to the terminal for the repeated transmission unit. That is, after the base station transmits all the data of the multicast service data to the terminal, all the data of the multicast service data is retransmitted to the terminal. This is repeated until the number of transmissions is reached.
  • the terminal receives the transmission that is sent by the base station and includes the foregoing multicast service data.
  • the terminal After the transmission indication information of the mode, the terminal can learn according to the transmission mode, and the terminal can receive the multicast service data transmitted by the base station by using all the data of the multicast service data as the repeated transmission unit. In this way, when receiving the multicast service data transmitted by the base station according to the transmission indication information, the terminal may receive the multicast service data repeatedly transmitted by the base station according to the number of transmissions, using all the data of the multicast service data as a repeated transmission unit.
  • FIG. 2 is a schematic diagram of a multicast service data according to an embodiment of the present invention.
  • the multicast service data includes N multicast service data units (ie, PDCP SDUs), and each multicast service data unit.
  • the k multicast service data packet (the multicast service data packet is TB in this example) is taken as an example. It is assumed that the transmission mode of the multicast service data included in the foregoing transmission indication information is: all data of the base station to the multicast service data.
  • the multicast service data is transmitted to the terminal for the repeated transmission unit, and the number of transmissions is four.
  • the base station may transmit the multicast service data to the terminal according to the transmission indication information, where the base station may perform the multicast service according to the order of each PDCP SDU of the multicast service data and the TB sequence in each PDCP SDU. After all the TBs of the data are sequentially transmitted to the terminal, all the TBs of the multicast service data are sequentially transmitted to the terminal in turn according to the order of each PDCP SDU of the multicast service data and the order of the TBs in each PDCP SDU. Until the number of transmissions reaches 4 times.
  • the terminal when receiving the multicast service data according to the transmission indication information, the terminal can receive all the data of the multicast service data as a repeated transmission unit, and there is no data that cannot be distinguished which is repeatedly transmitted, and ensures that When the base station transmits the same multicast service data to the terminal multiple times, the terminal can correctly receive the multicast service data transmitted multiple times.
  • the second case: the transmission mode of the foregoing multicast service data is: the base station transmits the multicast service data to the terminal by using the multicast service data unit as a repeated transmission unit.
  • the foregoing S105 may include: the base station repeatedly transmits the multicast service data to the terminal according to the number of transmissions, using the multicast service data unit as a repeated transmission unit.
  • the base station may use the multicast service data multicast service.
  • the data unit repeatedly transmits multicast service data to the terminal for the repeated transmission unit. That is, after transmitting a multicast service data unit of the multicast service data to the terminal, the base station repeatedly transmits the multicast service data unit to the terminal until the number of transmissions is reached, and then the base station continues to adopt the method. Transmitting, to the terminal, the next multicast service data unit of the multicast service data until all multicast service data sheets of the multicast service data are transmitted to the terminal yuan.
  • the terminal may learn according to the transmission mode, and the terminal may receive the transmission of the base station by using the multicast service data unit as the repeated transmission unit.
  • Multicast service data when receiving the multicast service data transmitted by the base station according to the transmission indication information, the terminal may receive the multicast service data repeatedly transmitted by the base station according to the number of transmissions, using the multicast service data unit as a repeated transmission unit.
  • FIG. 3 is a schematic diagram of another multicast service data according to an embodiment of the present invention.
  • FIG. 3 shows one multicast service data unit PDCP SDU1 of multicast service data, which is assumed to be multicast.
  • the service data unit includes k multicast service data packets (the multicast service data packet is TB in this example), and the transmission mode of the foregoing multicast service data included in the foregoing transmission indication information is: the base station uses the multicast service data unit.
  • the transmission indication information which may be: the base station according to each TB of the multicast service data unit.
  • the TB1-TBk of the multicast service data unit is sequentially transmitted to the terminal, the TB1-TBk of the multicast service data unit is sequentially transmitted to the terminal in turn according to the order of each TB of the multicast service data unit.
  • the base station will continue to transmit the next multicast service data unit of the multicast service data to the terminal in this manner.
  • the terminal when receiving the multicast service data according to the transmission indication information, the terminal can receive the multicast service unit as a repeated transmission unit, and there is no difference in which multicast service data unit is currently transmitted. The data ensures that the terminal can correctly receive the multicast service data when the base station transmits the same multicast service data to the terminal multiple times.
  • the third case: the transmission mode of the foregoing multicast service data is: the base station transmits the multicast service data to the terminal by using the multicast service data packet as a repeated transmission unit.
  • the foregoing S105 may include: the base station repeatedly transmits the multicast service data to the terminal by using the multicast service data packet as a repeated transmission unit according to the number of transmissions.
  • the base station may use the multicast service data multicast service.
  • the data packet repeatedly transmits multicast service data to the terminal for the repeated transmission unit. That is, after transmitting a multicast service data packet of the multicast service data to the terminal, the base station repeatedly transmits the multicast service data packet to the terminal until the number of transmissions is reached, and then the base station continues to adopt the method. And transmitting, to the terminal, the next multicast service data packet of the multicast service data, until all multicast service data packets of the multicast service data are transmitted to the terminal.
  • the terminal may learn, according to the transmission mode, that the terminal may receive the multicast service transmitted by the base station by using the multicast service data packet as a repeat transmission unit. data.
  • the terminal may receive the multicast service data repeatedly transmitted by the base station according to the number of transmissions, using the multicast service data packet as a repeated transmission unit.
  • the foregoing multicast packet is a TB.
  • FIG. 4 is a schematic diagram of another multicast service data according to an embodiment of the present invention. As shown in FIG. 4, FIG. 4 shows one of multicast service data.
  • the multicast service data unit PDCP SDU1 assuming that the multicast service data unit includes k multicast service data packets (in this example, the multicast service data packet is TB), when the foregoing transmission indication information includes the foregoing multicast service data.
  • the transmission mode is: the base station transmits the multicast service data to the terminal by using the multicast service data packet as the repeating transmission unit, and when the number of repeated transmissions is three, the base station transmits the multicast service data to the terminal according to the transmission indication information, which may be: After transmitting the TB1 of the multicast service data unit to the terminal in the order of each TB of the multicast service data unit, the base station repeatedly transmits the TB1 to the terminal until the number of repeated transmissions reaches 3 times, and the base station continues to adopt. In this manner, the terminal continues to transmit the next multicast service data packet of the multicast service data unit, that is, TB2, until the last multicast service data is transmitted to the terminal. The last element of multicast traffic packets.
  • the terminal when the terminal receives the multicast service data according to the transmission indication information, the terminal can receive the multicast service data packet as a repeated transmission unit, and there is no unclear which is the repeatedly transmitted data, and the base station is ensured.
  • the terminal When transmitting the same multicast service data to the terminal multiple times, the terminal can correctly receive the multicast service data transmitted multiple times.
  • the method of processing the RLC PDU by the RLC (Radio Link Control) entity is consistent with the UM mode in the previous LTE, and is not described here.
  • the multicast service transmission method provided by the embodiment of the present invention after the base station obtains the transmission mode including the multicast service data and the transmission indication information of the transmission times, the base station may transmit the group to the terminal multiple times according to the transmission indication information.
  • the service data is broadcasted, and the base station can also send the transmission indication information to the terminal, so that the terminal can correctly receive the multicast service data sent by the base station multiple times according to the transmission indication information, and there is no clear which one is duplicated.
  • the data transferred. Therefore, the multicast service transmission method provided by the embodiment of the present invention ensures that the terminal can correctly receive the number of multicast services that are transmitted multiple times on the basis of implementing the same multicast service data transmission to the terminal multiple times. According to the method, the probability that the terminal successfully receives the multicast service data is improved, and the robustness of the multicast service is enhanced.
  • FIG. 5 is a flowchart of signaling interaction of another multicast service transmission method according to an embodiment of the present invention.
  • the second embodiment relates to a specific process for the base station to send the first indication information and the multicast service data packet indicated by the first indication information to the terminal according to the transmission indication information.
  • the above S105 and S106 can also be replaced by the following steps, specifically:
  • the base station sends, according to the transmission indication information, the first indication information and the multicast service data packet indicated by the first indication information to the terminal.
  • the base station before the base station sends the multicast service data to the terminal according to the transmission indication information, the base station may also be the multicast service data of the multicast service data according to the number of the multicast service data packets.
  • the packet generates first indication information corresponding to the multicast service data packet.
  • the first indication information is used to indicate the identifier of the multicast service data packet, so that when receiving the multicast service data packet, the terminal can learn, according to the first indication information, that the currently received multicast service data packet is Which multicast service packet.
  • the foregoing identification of the multicast service data packet may be allocated by the base station.
  • the base station transmits the multicast service data to the terminal by using all the data of the multicast service data as the repeated transmission unit.
  • the base station may assign a number to each multicast service data packet as the group according to the number of all multicast service data packets of the multicast service data and the multicast service data packet of the multicast service data in the order of the physical layer.
  • the identifier of the service data packet is generated, and the first indication information is generated for the multicast service data packet according to the identifier of the multicast service data packet, so that when the terminal receives the multicast service data packet, the terminal may according to the first indication
  • the information determines which multicast service data packet in the multicast service data is received.
  • the base station transmits the multicast service data to the terminal by using the multicast service data unit as the repeat transmission unit, the base station may use the number of all multicast service data packets according to the multicast service data, and The multicast service data packet of the multicast service data is in the order of the physical layer, and each multicast service data packet is assigned a number as the identifier of the multicast service data packet, and may also be based on all groups of each multicast service data unit.
  • the identifier of the service data packet is generated, and the first indication information is generated for the multicast service data packet according to the identifier of the multicast service data packet, so that when the terminal receives the multicast service data packet, the terminal may according to the first indication
  • the information determines which multicast service data packet in the multicast service data unit is received.
  • the first indication information is used to indicate the identifier of the TB.
  • the foregoing multicast service data packet is a segment, and the segment includes multiple TBs, all the TBs in the segment correspond to the same first indication information, that is, the identifiers of all the TBs in the segment. the same.
  • the multicast service data packet is a segment and the segment is equal to the multicast service data unit, that is, when the multicast service data packet is a multicast service data data unit, the multicast service data is used. All TBs in the data unit correspond to the same first indication information, that is, the identifiers of all the TBs in the segment are the same.
  • the base station may transmit each of the multicast service data according to the transmission indication information.
  • the first indication information of the multicast service data packet is simultaneously transmitted to the terminal.
  • the transmission mode in the foregoing transmission indication information is not limited.
  • the repeated transmission unit must be a multicast service data packet, or all data of the multicast service data, or a multicast service data unit (ie, a PDCP SDU) of the multicast service data.
  • the embodiment does not limit the manner in which the base station sends the first indication information to the terminal.
  • the foregoing base station may separately send the first indication information to the terminal, and may also carry the first indication information in a control channel and send the terminal to the terminal or the like.
  • the control channel referred to here may be, for example, a PDCCH.
  • the first indication information is carried in the PDCCH and sent to the terminal.
  • the base station may carry the first indication information in the Downlink Control Information (DCI) of the PDCCH and send the information to the terminal. Wait.
  • DCI Downlink Control Information
  • the terminal receives the first indication information sent by the base station according to the transmission indication information.
  • the terminal determines, according to the first indication information, whether the multicast service data packet corresponding to the identifier of the multicast service data packet has been successfully received.
  • the terminal may first determine, according to the first indication information, whether the multicast service data packet corresponding to the identifier of the multicast service data packet has been successfully received by the terminal, and if yes, the terminal does not need to receive the terminal again. If the multicast service data packet is not, the terminal continues to receive the multicast service data packet corresponding to the identifier of the multicast service data packet sent by the base station according to the transmission indication information. In this way, the terminal can be prevented from repeatedly receiving the multicast service data packet that has been successfully received, which is reduced. The overhead of the terminal.
  • the multicast service data packets that are successfully received by different terminals under different channel conditions may be different. Therefore, by sending the first indication information to indicate the manner of each multicast service data packet to the terminal, the group can be made.
  • Each terminal involved in the broadcast service data may use the first indication information to determine whether the multicast service data packet corresponding to the first indication information has been successfully received. Therefore, under the premise of ensuring that all terminals involved in the multicast service data can successfully receive the multicast service data, the overhead of all terminals involved in the multicast service data is reduced.
  • the terminal may determine whether the multicast service data packet identifier corresponding to the multicast service data packet identifier has been successfully received by determining whether the identifier of the multicast service data packet includes the identifier of the multicast service data packet. data pack. If yes, it is determined that the multicast service data packet corresponding to the multicast service data packet identifier has been successfully received, and the terminal can ignore the multicast service data packet transmitted by the base station, and does not perform any processing. If not, it is determined that the multicast service data packet corresponding to the identifier of the multicast service data packet is not successfully received, and the process proceeds to S204.
  • the terminal When determining, by the terminal, that the multicast service data packet indicated by the identifier of the multicast service data packet is not successfully received, the terminal continues to receive the multicast service data packet corresponding to the identifier of the multicast service data packet sent by the base station according to the transmission indication information. .
  • the terminal may continue to receive the multicast service data packet sent by the base station according to the transmission indication information.
  • the corresponding multicast service data packet is identified.
  • the terminal can receive the multicast service data packet corresponding to the identifier of the multicast service data packet sent by the base station according to the transmission indication information.
  • the method may further include: determining that the multicast service data packet can be successfully parsed after the terminal continues to receive the multicast service data packet corresponding to the identifier of the multicast service data packet sent by the base station.
  • the terminal may record the identifier of the multicast service data packet, so that when the base station multicasts the multicast service data packet again, the terminal The multicast service data packet corresponding to the multicast service data packet identifier is successfully received by the identifier of the multicast service data packet that is recorded by itself, that is, the terminal can ignore the multicast service transmitted by the base station.
  • the data packet is not processed to reduce the overhead of the terminal.
  • the base station may be configured for each multicast service data.
  • the packet generates a first indication information for indicating the identifier of the multicast service data packet, and sends the first indication information along with the multicast service data packet to the multicast service data packet when the multicast service data is sent to the terminal according to the transmission indication information.
  • the terminal so that the terminal can determine, according to the first indication information, whether the multicast service data packet has been successfully received, and continue to receive the multicast service sent by the base station after determining that the multicast service data packet is not successfully received.
  • the data packet when determining that the multicast service data packet corresponding to the multicast service data packet identifier has been successfully received, the terminal can ignore the multicast service data packet transmitted by the base station without any processing. In this way, the terminal can be prevented from repeatedly receiving the multicast service data packet that has been successfully received, thereby reducing the overhead of the terminal.
  • FIG. 6 is a flowchart of signaling interaction of a third embodiment of a multicast service transmission method according to an embodiment of the present disclosure.
  • the third embodiment relates to a specific process in which a base station sends multicast service notification information to a terminal.
  • the method may further include:
  • the base station sends multicast service notification information to the terminal.
  • the multicast service notification information is used to indicate the number of multicast service data packets of the multicast service data to the terminal.
  • the base station may further send the multicast service notification information to the terminal to indicate the multicast service data packet of the multicast service data. Number.
  • the embodiment does not limit the manner in which the base station sends the multicast service notification information to the terminal.
  • the foregoing base station may separately send the multicast service notification information to the terminal, and may also carry the multicast service notification information in a control channel and send the information to the terminal.
  • the control channel referred to here may be, for example, an SC-MCCH or a PDCCH.
  • the transmission indication information is carried in the PDCCH and sent to the terminal.
  • the base station may carry the transmission indication information in the DCI of the PDCCH and send it to the terminal or the like.
  • the multicast service notification information is carried in the SC-MCCH and sent to the terminal.
  • the base station may send the multicast service notification information to the terminal in the MTCH list on the SC-MCCH.
  • the segment numbersize indicates the number of multicast data packets included in the multicast service data
  • the segment numbersize parameter can indicate the group to the terminal. The number of multicast service packets for broadcasting service data.
  • the foregoing MTCH may further include: pdcpsdunumbersize, pdcpsize, segmentsize, where, pdcpsdunumbersize It is used to indicate the number of multicast service data units (ie PDCP SDUs) included in the above multicast service data, pdcpsize represents the number of transport blocks included in a multicast service data packet PDCP SDU, and segmentsize represents the transmission contained in a multicast service data packet. The number of blocks, etc.
  • the terminal receives the multicast service notification information.
  • the terminal may determine, according to the number of multicast service data packets that it successfully received, whether all multicast service data packets of the multicast service data have been received. In this way, the terminal can ensure that the terminal can correctly and completely receive the multicast service data, thereby improving the probability that the terminal successfully receives the multicast service data, and enhancing the robustness of the multicast service.
  • the foregoing multicast service notification information may further include: a quantity of TBs in each multicast service data packet, so that the terminal can be successfully received according to the group.
  • the number of TBs in the service data packet is used to determine whether each multicast service data packet of the multicast service data has been received, and in this way, the terminal can correctly and completely receive the multicast service data.
  • the probability of the terminal successfully receiving the multicast service data is further improved, and the robustness of the multicast service is further enhanced.
  • the base station may send the multicast service notification information to the terminal, so that after receiving the multicast service notification information, the terminal may receive the multicast service data packet successfully received by the terminal.
  • the number is used to determine whether all the multicast service data packets of the multicast service data have been received, and in this way, the terminal can ensure that the terminal can correctly and completely receive the multicast service data, thereby improving the terminal successfully receiving the multicast.
  • the probability of service data enhances the robustness of multicast services.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.
  • FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • the base station may include: a receiver 11, a processor 12, and a transmitter 13;
  • the receiver 11 is configured to receive multicast service data sent by the core network device.
  • the processor 12 is configured to obtain transmission indication information of the multicast service, where the indication information includes: The transmission mode of the broadcast service data, and the number of transmissions; optionally, the processor 12 may determine the group according to the service type of the multicast service data, and the mapping relationship between the preset service type and the transmission indication information.
  • the transmission indication information of the broadcast service may also control the receiver 11 to receive the transmission indication information of the multicast service sent by the core network device.
  • the transmitter 13 is configured to send the transmission indication information to the terminal, and transmit the multicast service data to the terminal according to the transmission indication information.
  • the base station provided by the embodiment of the present invention may be used to perform the steps performed by the base station in the foregoing method embodiment shown in FIG. 1 , and the implementation principle and technical effects are similar, and details are not described herein again.
  • the foregoing multicast service data includes: multiple multicast service data units, where each multicast service data unit includes at least one multicast service data packet; The number of multicast service data units included in the data is determined by the base station.
  • the transmitter 13 is specifically configured to transmit according to the transmission.
  • the number of times, in which all data of the multicast service data is a repeated transmission unit the multicast service data is repeatedly transmitted to the terminal.
  • the transmission mode of the multicast service data is: when the multicast service data unit is used as the repeating transmission unit to transmit the multicast service data to the terminal, the transmitter 13 is specifically configured to use the multicast service data unit according to the number of transmissions. The transmission unit is repeated, and the multicast service data is repeatedly transmitted to the terminal.
  • the transmission mode of the multicast service data is: when the multicast service data packet is used as the repeating transmission unit to transmit the multicast service data to the terminal, the transmitter 13 is specifically configured to use the multicast service data packet according to the number of transmissions. The transmission unit is repeated, and the multicast service data is repeatedly transmitted to the terminal.
  • the transmitter 13 may be further configured to send multicast service notification information to the terminal, where the multicast service notification information is used to indicate the multicast service of the multicast service data to the terminal.
  • the number of packets may be further configured to send multicast service notification information to the terminal, where the multicast service notification information is used to indicate the multicast service of the multicast service data to the terminal. The number of packets.
  • the base station provided by the embodiment of the present invention may be used to perform the steps performed by the base station in the foregoing method embodiment shown in FIG. 6.
  • the implementation principle and technical effects are similar, and details are not described herein again.
  • the processor 12 is further configured to: before the transmitter 13 sends the multicast service data to the terminal according to the transmission indication information, generate a first indication for the multicast service data packet of the multicast service data according to the number of the multicast service data packet. Information, where the first indication information is used to indicate to the terminal an identifier of the multicast service data packet;
  • the transmitter 13 may be configured to send the first indication information and the multicast service data packet indicated by the first indication information to the terminal according to the transmission indication information.
  • the base station provided by the embodiment of the present invention may be used to perform the steps performed by the base station in the foregoing method embodiment shown in FIG. 5, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention. As shown in FIG. 8, the terminal may include: a receiver 21 and a processor 22;
  • the receiver 21 is configured to receive transmission indication information sent by the base station
  • the processor 22 is configured to: according to the transmission indication information, the control receiver 21 receives the multicast service data transmitted by the base station; the transmission indication information includes: a transmission mode of the multicast service data, and a number of transmissions.
  • the terminal provided by the embodiment of the present invention may be used to perform the steps performed by the terminal in the method embodiment shown in FIG. 1 , and the implementation principle and the technical effect are similar, and details are not described herein again.
  • the foregoing multicast service data may include: multiple multicast service data units, where each multicast service data unit includes at least one multicast service data packet; The number of multicast service data units included in the service data is determined by the base station.
  • the processor 22 may be specifically configured to be used. According to the number of transmissions, all the data of the multicast service data is a repeated transmission unit, and the control receiver 21 receives the multicast service data repeatedly transmitted by the base station. In the case that the transmission mode of the multicast service data is: when the multicast service data unit is used as the repeating transmission unit to receive the multicast service data transmitted by the base station, the processor 22 may be specifically configured to use the multicast service data according to the number of transmissions.
  • the unit is a repeating transmission unit, and the control receiver 21 receives the multicast service data repeatedly transmitted by the base station.
  • the transmission mode of the multicast service data is: when the multicast service data packet is used as the repeating transmission unit to receive the multicast service data transmitted by the base station, the processor 22 may be specifically configured to use the multicast service data according to the number of transmissions.
  • the packet is a repeated transmission unit, and the control receiver receives the multicast service data repeatedly transmitted by the base station.
  • the receiver 21 is further configured to receive multicast service notification information sent by the base station, where the multicast service notification information is used to indicate the multicast service data packet of the multicast service data. Number.
  • the terminal provided by the embodiment of the present invention may be used to execute the foregoing method embodiment shown in FIG.
  • the implementation steps and the technical effects of the steps performed by the terminal are similar, and are not described here.
  • the processor 22 is specifically configured to: according to the transmission indication information, the control receiver 21 receives the first indication information sent by the base station, and determines, according to the first indication information, whether the multicast service data packet corresponding to the identifier of the multicast service data packet is After receiving the multicast service data packet indicated by the identifier of the multicast service data packet, the control receiver 21 continues to receive the identifier of the multicast service data packet sent by the base station according to the transmission indication information.
  • the multicast service data packet wherein the first indication information is used to indicate the identifier of the multicast service data packet; the first indication information is the multicast service data of the multicast service data according to the number of the multicast service data packets of the base station.
  • the indication information generated by the package is specifically configured to: according to the transmission indication information, the control receiver 21 receives the first indication information sent by the base station, and determines, according to the first indication information, whether the multicast service data packet corresponding to the identifier of the multicast service data packet is After receiving the multicast
  • the terminal provided by the embodiment of the present invention may be used to perform the steps performed by the terminal in the foregoing method embodiment shown in FIG. 5, and the implementation principle and technical effects are similar, and details are not described herein again.
  • the processor 22 is further configured to: after the control receiver 21 continues to receive the multicast service data packet corresponding to the identifier of the multicast service data packet sent by the base station, determine the identity of the successfully received multicast service data packet. The identifier of the multicast service data packet is recorded when the corresponding multicast service data packet is used.
  • the processor 22 is specifically configured to determine whether the identifier of the multicast service data packet includes the identifier of the multicast service data packet, and does not determine the identifier of the recorded multicast service data packet. When the identifier of the multicast service data packet is included, the multicast service data packet corresponding to the identifier of the multicast service data packet is not successfully received.
  • the terminal in the embodiment of the present invention may be a wireless terminal such as a mobile phone or a tablet computer. Therefore, the terminal is a mobile phone as an example:
  • FIG. 9 is a structural block diagram of a terminal when the terminal is a mobile phone according to an embodiment of the present invention.
  • the mobile phone may include: a radio frequency (RF) circuit 1110, a memory 1120, an input unit 1130, a display unit 1140, a sensor 1150, an audio circuit 1160, a wireless fidelity (WiFi) module 1170, and processing.
  • RF radio frequency
  • the structure of the handset shown in FIG. 9 does not constitute a limitation to the handset, and may include more or less components than those illustrated, or some components may be combined, or different components may be arranged.
  • the RF circuit 1110 can be used for receiving and transmitting signals during the transmission or reception of information or during a call. Specifically, after receiving the downlink information of the base station, the processing is performed by the processor 1180. In addition, the uplink data is sent. Send to the base station.
  • RF circuits include, but are not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like.
  • LNA Low Noise Amplifier
  • RF circuitry 1110 can also communicate with the network and other devices via wireless communication. The above wireless communication may use any communication standard or protocol, including but not limited to Global System of Mobile communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (Code Division). Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), e-mail, Short Messaging Service (SMS), and the like.
  • GSM Global System of Mobile communication
  • the memory 1120 can be used to store software programs and modules, and the processor 1180 executes various functional applications and data processing of the mobile phone by running software programs and modules stored in the memory 1120.
  • the memory 1120 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may be stored according to Data created by the use of the mobile phone (such as audio data, phone book, etc.).
  • memory 1120 can include high speed random access memory, and can also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
  • the input unit 1130 can be configured to receive input numeric or character information and to generate key signal inputs related to user settings and function controls of the handset.
  • the input unit 1130 may include a touch panel 1131 and other input devices 1132.
  • the touch panel 1131 also referred to as a touch screen, can collect touch operations on or near the user (such as the user using a finger, a stylus, or the like on the touch panel 1131 or near the touch panel 1131. Operation), and drive the corresponding connecting device according to a preset program.
  • the touch panel 1131 may include two parts: a touch detection device and a touch controller.
  • the touch detection device detects the touch orientation of the user, and detects a signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into contact coordinates, and sends the touch information.
  • the processor 1180 is provided and can receive commands from the processor 1180 and execute them.
  • the touch panel 1131 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves.
  • the input unit 1130 may also include other input devices 1132.
  • other input devices 1132 may include, but are not limited to, a physical keyboard, function keys (such as a volume control button, a switch button, etc.), a trackball, One or more of a mouse, a joystick, and the like.
  • the display unit 1140 can be used to display information input by the user or information provided to the user as well as various menus of the mobile phone.
  • the display unit 1140 may include a display panel 1141.
  • the display panel 1141 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.
  • the touch panel 1131 can be overlaid on the display panel 1141.
  • the touch panel 1131 detects a touch operation thereon or nearby, the touch panel 1131 transmits to the processor 1180 to determine the type of the touch event, and then the processor 1180 is The type of touch event provides a corresponding visual output on display panel 1141.
  • the touch panel 1131 and the display panel 1141 are two independent components to implement the input and input functions of the mobile phone, in some embodiments, the touch panel 1131 and the display panel 1141 may be integrated. Realize the input and output functions of the phone.
  • the handset may also include at least one type of sensor 1150, such as a light sensor, motion sensor, and other sensors.
  • the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 1141 according to the brightness of the ambient light, and the light sensor may close the display panel 1141 and/or when the mobile phone moves to the ear. Or backlight.
  • the acceleration sensor can detect the acceleration of each direction (usually three axes). When it is still, it can detect the magnitude and direction of gravity. It can be used to identify the gesture of the mobile phone (such as horizontal and vertical screen switching, related games).
  • the mobile phone can also be configured with gyroscopes, barometers, hygrometers, thermometers, infrared sensors and other sensors, no longer repeat .
  • Audio circuitry 1160, speaker 1161, and microphone 1162 can provide an audio interface between the user and the handset.
  • the audio circuit 1160 can transmit the converted electrical data of the received audio data to the speaker 1161, and convert it into a sound signal output by the speaker 1161; on the other hand, the microphone 1162 converts the collected sound signal into an electrical signal, and the audio circuit 1160 After receiving, it is converted into audio data, and then processed by the audio data output processor 1180, transmitted to the other mobile phone via the RF circuit 1110, or outputted to the memory 1120 for further processing.
  • WiFi is a short-range wireless transmission technology.
  • the mobile phone can help users to send and receive emails, browse web pages and access streaming media through the WiFi module 1170, which provides users with wireless broadband Internet access.
  • FIG. 9 shows the WiFi module 1170, it can be understood that it does not belong to the essential configuration of the mobile phone, and can be omitted as needed within the scope of not changing the essence of the invention.
  • the processor 1180 is a control center for the handset, which connects various portions of the entire handset using various interfaces and lines, by executing or executing software programs and/or modules stored in the memory 1120, and invoking data stored in the memory 1120, The phone's various functions and processing data, so that the overall monitoring of the phone.
  • the processor 1180 may include one or more processing units; preferably, the processor 1180 may integrate an application processor and a modem processor, where the application processor mainly processes an operating system, a user interface, an application, and the like.
  • the modem processor primarily handles wireless communications. It will be appreciated that the above described modem processor may also not be integrated into the processor 1180.
  • the handset also includes a power source 1190 (such as a battery) that powers the various components.
  • a power source can be logically coupled to the processor 1180 via a power management system to manage functions such as charging, discharging, and power management through the power management system.
  • the mobile phone can also include a camera 1200, which can be a front camera or a rear camera.
  • the mobile phone may further include a Bluetooth module, a GPS module, and the like, and details are not described herein again.
  • the processor 1180 included in the mobile phone may be used to perform the foregoing method for transmitting a multicast service.
  • the implementation principle and technical effects are similar, and details are not described herein.
  • Another aspect of the present invention further provides a communication system, which may include the foregoing base station provided in FIG. 7 and the terminal provided in FIG. 8, wherein the base station may be used to perform FIG. 1, FIG. 5 and FIG.
  • the base station may be used to perform FIG. 1, FIG. 5 and FIG.
  • the steps performed by the base station in the method embodiment shown in the foregoing method, the foregoing terminal may be used to perform the steps performed by the terminal in the method embodiment shown in FIG. 1, FIG. 5 and FIG. I won't go into details here.

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Abstract

本发明实施例提供一种组播业务传输方法、终端、基站和通信系统,该方法包括:接收核心网设备发送的组播业务数据;获取组播业务的传输指示信息;所述传输指示信息包括:所述组播业务数据的传输模式,以及,传输次数;向终端发送所述传输指示信息,并根据所述传输指示信息向所述终端传输所述组播业务数据。本发明实施例提供的组播业务传输方法、终端、基站和通信系统,能够在组播业务数据的数据量较大时,通过增加组播业务数据的传输次数,提高终端成功接收组播业务数据的概率,增强组播业务的鲁棒性。

Description

组播业务传输方法、终端、基站和通信系统 技术领域
本发明实施例涉及通信技术,尤其涉及一种组播业务传输方法、终端、基站和通信系统。
背景技术
部署在长期演进(Long Term Evolution,简称:LTE)系统中的基于蜂窝的窄带物联网(Narrow Band Internet of Things,NB-IoT)是万物互联网络的一个分支,具有覆盖广、连接多、速率低、成本低、功耗少、架构优等特点。因此,NB-IoT可以为吞吐量、成本、能耗都很低的海量物联网终端提供支撑。这里所说的终端例如可以为智能电表、智能水表、智能停车设备等。
现有技术中,NB-IoT中的基站可以通过单小区单点到多点(Single Cell Point to Multiple,简称:SC-PTM)的组播技术,将核心网设备下发的组播业务数据发送给小区覆盖范围内的所有终端。其中,上述组播业务数据对应的组播业务例如可以为软件升级业务、区域内的应急通知业务等。具体实现时,基站可以先根据传输块的大小,将上述组播业务数据映射到多个传输块上,然后向小区的所有终端依次传输每个传输块,以达到向终端传输该组播业务数据的目的。
然而,当上述组播业务数据的数据量较大时,上述组播业务数据对应的传输块的数量也会较多,使得基站在通过向小区的所有终端依次传输每个传输块的方式,来传输该组播业务数据时,终端成功接收该组播业务数据的概率较低,因此,基站如何向终端传输上述组播业务数据,以增强组播业务的鲁棒性,是一个亟待解决的问题。
发明内容
本发明实施例提供一种组播业务传输方法、终端、基站和通信系统,用于增强组播业务的鲁棒性。
第一方面,本发明实施例提供一种组播业务传输方法,包括:接收核 心网设备发送的组播业务数据;获取组播业务的传输指示信息;所述传输指示信息包括:所述组播业务数据的传输模式,以及,传输次数;向终端发送所述传输指示信息,并根据所述传输指示信息向所述终端传输所述组播业务数据。
通过第一方面提供的组播业务传输方法,基站在接收到核心网设备发送的组播业务数据之后,基站可以获取包括该组播业务数据的传输模式,以及传输次数的传输指示信息,以使得基站可以根据该传输指示信息,向终端多次传输该组播业务数据,同时基站还可以将该传输指示信息发送给终端,以使得终端可以根据该传输指示信息,正确的接收基站多次发送的组播业务数据。因此,本发明实施例提供的组播业务传输方法,可以在组播业务数据的数据量较大时,通过增加组播业务数据的传输次数,提高了终端成功接收组播业务数据的概率,增强了组播业务的鲁棒性。
可选的,在第一方面的一种可能的实施方式中,上述组播业务数据包括:多个组播业务数据单元,每个所述组播业务数据单元包括至少一个组播业务数据包;其中,所述组播业务数据所包括的组播业务数据单元的数量由基站确定。
可选的,在第一方面的一种可能的实施方式中,所述组播业务数据的传输模式为:以所述组播业务数据的全部数据为重复传输单位向所述终端传输所述组播业务数据;所述根据所述传输指示信息向所述终端传输所述组播业务数据,包括:按照所述传输次数,以所述组播业务数据的全部数据为重复传输单位,向所述终端重复传输所述组播业务数据。
可选的,在第一方面的一种可能的实施方式中,所述组播业务数据的传输模式为:以所述组播业务数据单元为重复传输单位向所述终端传输所述组播业务数据;所述根据所述传输指示信息向所述终端传输所述组播业务数据,包括:按照所述传输次数,以所述组播业务数据单元为重复传输单位,向所述终端重复传输所述组播业务数据。
可选的,在第一方面的一种可能的实施方式中,所述组播业务数据的传输模式为:以所述组播业务数据包为重复传输单位向所述终端传输所述组播业务数据;所述根据所述传输指示信息向所述终端传输所述组播业务数据,包括:按照所述传输次数,以所述组播业务数据包为重复传输单位,向所述 终端重复传输所述组播业务数据。
可选的,在第一方面的一种可能的实施方式中,所述获取所述组播业务的传输指示信息,包括:根据所述组播业务数据的业务类型,以及,预设的业务类型与传输指示信息之间的映射关系,确定所述组播业务的传输指示信息。
可选的,在第一方面的一种可能的实施方式中,所述获取所述组播业务的传输指示信息,包括:接收所述核心网设备发送的所述组播业务的传输指示信息。
可选的,在第一方面的一种可能的实施方式中,所述方法还包括:向所述终端发送组播业务通知信息,所述组播业务通知信息用于向所述终端指示所述组播业务数据的组播业务数据包的个数。
通过该可能的实施方式提供的组播业务传输方法,基站可以向终端发送组播业务通知信息,以使得终端在接收到该组播业务通知信息之后,可以根据其所成功接收到的组播业务数据包的数量,来判断是否已经接收完该组播业务数据的所有组播业务数据包,进而通过这种方式来确保终端可以正确的、完整的接收该组播业务数据,提高了终端成功接收组播业务数据的概率,增强了组播业务的鲁棒性。
可选的,在第一方面的一种可能的实施方式中,所述根据所述传输指示信息向所述终端发送所述组播业务数据之前,还包括:根据所述组播业务数据包的个数,为所述组播业务数据的组播业务数据包生成第一指示信息,其中,所述第一指示信息用于向所述终端指示所述组播业务数据包的标识;所述根据所述传输指示信息向所述终端发送所述组播业务数据,包括:根据所述传输指示信息,向所述终端发送所述第一指示信息和所述第一指示信息所指示的组播业务数据包。
通过该可能的实施方式提供的组播业务传输方法,基站可以为每个组播业务数据包生成一个用于指示该组播业务数据包的标识的第一指示信息,并在根据传输指示信息向终端发送组播业务数据时,将该第一指示信息随组播业务数据包一同发送给终端,从而使得终端可以根据该第一指示信息,确定是否已成功接收该组播业务数据包,并在确定未成功接收该组播业务数据包时,才会继续接收基站发送的该组播业务数据包,而在确定已成功接收该组 播业务数据包标识相对应的组播业务数据包时,终端就可以忽略基站传输的该组播业务数据包,不做任何处理。通过这种方式,可以避免终端重复接收已经接收成功的组播业务数据包,降低了终端的开销。
第二方面,本发明实施例提供一种组播业务传输方法,包括:接收基站发送的传输指示信息;所述传输指示信息包括:所述组播业务数据的传输模式,以及,传输次数;根据所述传输指示信息,接收所述基站传输的所述组播业务数据。
通过第二方面提供的组播业务传输方法,终端可以接收到基站发送的传输指示信息,以使得终端可以正确的接收基站根据该传输指示信息向终端多次传输的组播业务数据。因此,本发明实施例提供的组播业务传输方法,可以在组播业务数据的数据量较大时,通过增加组播业务数据的传输次数,提高了终端成功接收组播业务数据的概率,增强了组播业务的鲁棒性。
可选的,在第二方面的一种可能的实施方式中,所述组播业务数据包括:多个组播业务数据单元,每个所述组播业务数据单元包括至少一个组播业务数据包;其中,所述组播业务数据包括的组播业务数据单元的数量由所述基站确定。
可选的,在第二方面的一种可能的实施方式中,所述组播业务数据的传输模式为:以所述组播业务数据的全部数据为重复传输单位接收所述基站传输的所述组播业务数据;所述根据所述传输指示信息,接收所述基站传输的所述组播业务数据,包括:按照所述传输次数,以所述组播业务数据的全部数据为重复传输单位,接收所述基站重复传输的所述组播业务数据。
可选的,在第二方面的一种可能的实施方式中,所述组播业务数据的传输模式为:以所述组播业务数据单元为重复传输单位接收所述基站传输的所述组播业务数据;所述根据所述传输指示信息,接收所述基站传输的所述组播业务数据,包括:按照所述传输次数,以所述组播业务数据单元为重复传输单位,接收所述基站重复传输的所述组播业务数据。
可选的,在第二方面的一种可能的实施方式中,所述组播业务数据的传输模式为:以所述组播业务数据包为重复传输单位接收所述基站传输的所述组播业务数据;所述根据所述传输指示信息,接收所述基站传输的所述组播业务数据,包括:按照所述传输次数,以所述组播业务数据包为重复传输单 位,接收所述基站重复传输的所述组播业务数据。
可选的,在第二方面的一种可能的实施方式中,所述方法还包括:接收所述基站发送的组播业务通知信息,所述组播业务通知信息用于指示所述组播业务数据的组播业务数据包的个数。
通过该可能的实施方式提供的组播业务传输方法,终端可以接收到基站发送的组播业务通知信息,从而使得终端可以根据其所成功接收到的组播业务数据包的数量,来判断是否已经接收完该组播业务数据的所有组播业务数据包,进而通过这种方式来确保终端可以正确的、完整的接收该组播业务数据,提高了终端成功接收组播业务数据的概率,增强了组播业务的鲁棒性。
进一步地,在第二方面的一种可能的实施方式中,所述根据所述传输指示信息,接收所述基站传输的所述组播业务数据,包括:根据所述传输指示信息,接收所述基站发送的第一指示信息,其中,所述第一指示信息用于指示所述组播业务数据包的标识;所述第一指示信息为所述基站根据所述组播业务数据包的个数,为所述组播业务数据的组播业务数据包生成的指示信息;根据所述第一指示信息,确定所述组播业务数据包的标识相对应的组播业务数据包是否已经被成功接收;在确定未成功接收所述组播业务数据包的标识所指示的组播业务数据包时,根据所述传输指示信息,继续接收所述基站发送的所述组播业务数据包的标识相对应的组播业务数据包。
通过该可能的实施方式提供的组播业务传输方法,终端可以根据传输指示信息,接收基站为每个组播业务数据包生成的用于指示该组播业务数据包的标识的第一指示信息,从而使得终端可以根据该第一指示信息,确定是否已成功接收该组播业务数据包,并在确定未成功接收该组播业务数据包时,才会继续接收基站发送的该组播业务数据包,而在确定已成功接收该组播业务数据包标识相对应的组播业务数据包时,终端就可以忽略基站传输的该组播业务数据包,不做任何处理。通过这种方式,可以避免终端重复接收已经接收成功的组播业务数据包,降低了终端的开销。
进一步地,在第二方面的一种可能的实施方式中,所述继续接收所述基站发送的所述组播业务数据包的标识相对应的组播业务数据包之后,还包括:在确定成功接收所述组播业务数据包的标识相对应的组播业务数据包时,记录所述组播业务数据包的标识。
通过该可能的实施方式提供的组播业务传输方法,终端可以在确定成功接收基站发送的组播业务数据包的标识相对应的组播业务数据包之后,记录该组播业务数据包的标识,以使得终端在接收到基站为每个组播业务数据包生成的用于指示该组播业务数据包的标识的第一指示信息后,可以根据其所记录的接收成功的组播业务数据包的标识,以及,该第一指示信息中的组播业务数据包的标识,确定是否已成功接收该第一指示信息所指示的组播业务数据包,并在确定未成功接收该组播业务数据包时,才会继续接收基站发送的该组播业务数据包,而在确定已成功接收该组播业务数据包标识相对应的组播业务数据包时,终端就可以忽略基站传输的该组播业务数据包,不做任何处理。通过这种方式,可以避免终端重复接收已经接收成功的组播业务数据包,降低了终端的开销。
可选的,在第二方面的一种可能的实施方式中,所述根据所述第一指示信息,确定所述组播业务数据包的标识相对应的组播业务数据包是否已经被成功接收,包括:判断已记录的组播业务数据包的标识中是否包含所述组播业务数据包的标识,若已记录的组播业务数据包的标识中未包含所述组播业务数据包的标识,则确定未成功接收所述组播业务数据包的标识相对应的组播业务数据包。
第三方面,本发明实施例提供一种基站,所述基站包括:
接收机,用于接收核心网设备发送的组播业务数据;处理器,用于获取所述组播业务的传输指示信息;所述传输指示信息包括:所述组播业务数据的传输模式,以及,传输次数;发射机,用于向终端发送所述传输指示信息,并根据所述传输指示信息向所述终端传输所述组播业务数据。
通过第三方面提供的基站,基站的接收机在接收到核心网设备发送的组播业务数据之后,基站的处理器可以获取包括该组播业务数据的传输模式,以及传输次数的传输指示信息,以使得基站的发射机可以根据该传输指示信息,向终端多次传输该组播业务数据,同时基站的发射机还可以将该传输指示信息发送给终端,以使得终端可以根据该传输指示信息,正确的接收基站多次发送的组播业务数据。因此,可以在组播业务数据的数据量较大时,通过增加组播业务数据的传输次数,提高了终端成功接收组播业务数据的概率,增强了组播业务的鲁棒性。
可选的,在第三方面的一种可能的实施方式中,所述组播业务数据包括:多个组播业务数据单元,每个所述组播业务数据单元包括至少一个组播业务数据包;其中,所述组播业务数据所包括的组播业务数据单元的数量由所述基站确定。
可选的,在第三方面的一种可能的实施方式中,在所述组播业务数据的传输模式为:以所述组播业务数据的全部数据为重复传输单位向所述终端传输所述组播业务数据的情况下,所述发射机,具体用于按照所述传输次数,以所述组播业务数据的全部数据为重复传输单位,向所述终端重复传输所述组播业务数据。
可选的,在第三方面的一种可能的实施方式中,在所述组播业务数据的传输模式为:以所述组播业务数据单元为重复传输单位向所述终端传输所述组播业务数据的情况下,所述发射机,具体用于按照所述传输次数,以所述组播业务数据单元为重复传输单位,向所述终端重复传输所述组播业务数据。
可选的,在第三方面的一种可能的实施方式中,在所述组播业务数据的传输模式为:以所述组播业务数据包为重复传输单位向所述终端传输所述组播业务数据的情况下,所述发射机,具体用于按照所述传输次数,以所述组播业务数据包为重复传输单位,向所述终端重复传输所述组播业务数据。
可选的,在第三方面的一种可能的实施方式中,所述处理器,具体用于根据所述组播业务数据的业务类型,以及,预设的业务类型与传输指示信息之间的映射关系,确定所述组播业务的传输指示信息。
可选的,在第三方面的一种可能的实施方式中,所述处理器,具体用于控制所述接收机接收所述核心网设备发送的所述组播业务的传输指示信息。
可选的,在第三方面的一种可能的实施方式中,所述发射机,还用于向所述终端发送组播业务通知信息,所述组播业务通知信息用于向所述终端指示所述组播业务数据的组播业务数据包的个数。
通过该可能的实施方式提供的基站,基站的发射机还可以向终端发送组播业务通知信息,以使得终端在接收到该组播业务通知信息之后,可以根据其所成功接收到的组播业务数据包的数量,来判断是否已经接收完该组播业务数据的所有组播业务数据包,进而通过这种方式来确保终端可以正确的、完整的接收该组播业务数据,提高了终端成功接收组播业务数据的概率,增 强了组播业务的鲁棒性。
可选的,在第三方面的一种可能的实施方式中,所述处理器,还用于在所述发射机根据所述传输指示信息向所述终端发送所述组播业务数据之前,根据所述组播业务数据包的个数,为所述组播业务数据的组播业务数据包生成第一指示信息,其中,所述第一指示信息用于向所述终端指示所述组播业务数据包的标识;所述发射机,具体用于根据所述传输指示信息,向所述终端发送所述第一指示信息和所述第一指示信息所指示的组播业务数据包。
通过该可能的实施方式提供的基站,基站的处理器可以为每个组播业务数据包生成一个用于指示该组播业务数据包的标识的第一指示信息,以使得基站的发射机根据传输指示信息向终端发送组播业务数据时,可以将该第一指示信息随组播业务数据包一同发送给终端,从而使得终端可以根据该第一指示信息,确定是否已成功接收该组播业务数据包,并在确定未成功接收该组播业务数据包时,才会继续接收基站的发射机发送的该组播业务数据包,而在确定已成功接收该组播业务数据包标识相对应的组播业务数据包时,终端就可以忽略基站传输的该组播业务数据包,不做任何处理。通过这种方式,可以避免终端重复接收已经接收成功的组播业务数据包,降低了终端的开销。
第四方面,本发明实施例提供一种终端,所述终端包括:
接收机,用于接收基站发送的传输指示信息;处理器,用于根据所述传输指示信息,控制所述接收机接收所述基站传输的所述组播业务数据;所述传输指示信息包括:所述组播业务数据的传输模式,以及,传输次数。
通过第四方面提供的终端,终端的接收机可以接收到基站发送的传输指示信息,以使得终端的处理器可以正确的控制接收机接收基站根据该传输指示信息向终端多次传输的组播业务数据。因此,可以在组播业务数据的数据量较大时,通过增加组播业务数据的传输次数,提高了终端成功接收组播业务数据的概率,增强了组播业务的鲁棒性。
可选的,在第四方面的一种可能的实施方式中,所述组播业务数据包括:多个组播业务数据单元,每个所述组播业务数据单元包括至少一个组播业务数据包;其中,所述组播业务数据包括的组播业务数据单元的数量由所述基站确定。
可选的,在第四方面的一种可能的实施方式中,在所述组播业务数据的 传输模式为:以所述组播业务数据的全部数据为重复传输单位接收所述基站传输的所述组播业务数据的情况下,所述处理器,具体用于按照所述传输次数,以所述组播业务数据的全部数据为重复传输单位,控制所述接收机接收所述基站重复传输的所述组播业务数据。
可选的,在第四方面的一种可能的实施方式中,在所述组播业务数据的传输模式为:以所述组播业务数据单元为重复传输单位接收所述基站传输的所述组播业务数据的情况下,所述处理器,具体用于按照所述传输次数,以所述组播业务数据单元为重复传输单位,控制所述接收机接收所述基站重复传输的所述组播业务数据。
可选的,在第四方面的一种可能的实施方式中,在所述组播业务数据的传输模式为:以所述组播业务数据包为重复传输单位接收所述基站传输的所述组播业务数据的情况下,所述处理器,具体用于按照所述传输次数,以所述组播业务数据包为重复传输单位,控制所述接收机接收所述基站重复传输的所述组播业务数据。
可选的,在第四方面的一种可能的实施方式中,所述接收机,还用于接收所述基站发送的组播业务通知信息,所述组播业务通知信息用于向所述终端指示所述组播业务数据的组播业务数据包的个数。
通过该可能的实施方式提供的终端,终端的接收机可以接收到基站发送的组播业务通知信息,从而使得终端的处理器可以根据其所成功接收到的组播业务数据包的数量,来判断是否已经接收完该组播业务数据的所有组播业务数据包,进而通过这种方式来确保终端可以正确的、完整的接收该组播业务数据,提高了终端成功接收组播业务数据的概率,增强了组播业务的鲁棒性。
进一步地,在第四方面的一种可能的实施方式中,所述处理器,具体用于根据所述传输指示信息,控制所述接收机接收所述基站发送的第一指示信息,并根据所述第一指示信息,确定所述组播业务数据包的标识相对应的组播业务数据包是否已经被成功接收,在确定未成功接收所述组播业务数据包的标识所指示的组播业务数据包时,根据所述传输指示信息,控制所述接收机继续接收所述基站发送的所述组播业务数据包的标识相对应的组播业务数据包;其中,所述第一指示信息用于指示所述组播业务数据包的标识;所述 第一指示信息为所述基站根据所述组播业务数据包的个数,为所述组播业务数据的组播业务数据包生成的指示信息。
通过该可能的实施方式提供的终端,终端的处理器可以根据传输指示信息,接收基站为每个组播业务数据包生成的用于指示该组播业务数据包的标识的第一指示信息,从而使得终端的处理器可以根据该第一指示信息,确定是否已成功接收该组播业务数据包,并在确定未成功接收该组播业务数据包时,才会继续接收基站发送的该组播业务数据包,而在确定已成功接收该组播业务数据包标识相对应的组播业务数据包时,终端的处理器就可以忽略基站传输的该组播业务数据包,不做任何处理。通过这种方式,可以避免终端重复接收已经接收成功的组播业务数据包,降低了终端的开销。
进一步地,在第四方面的一种可能的实施方式中,所述处理器,还用于在控制所述接收机继续接收所述基站发送的所述组播业务数据包的标识相对应的组播业务数据包之后,在确定成功接收所述组播业务数据包的标识相对应的组播业务数据包时,记录所述组播业务数据包的标识。
通过该可能的实施方式提供的终端,终端的处理器可以在确定成功接收基站发送的组播业务数据包的标识相对应的组播业务数据包之后,记录该组播业务数据包的标识,以使得终端的处理器在控制接收机接收到基站为每个组播业务数据包生成的用于指示该组播业务数据包的标识的第一指示信息后,可以根据其所记录的接收成功的组播业务数据包的标识,以及,该第一指示信息中的组播业务数据包的标识,确定是否已成功接收该第一指示信息所指示的组播业务数据包,并在确定未成功接收该组播业务数据包时,才会控制接收机继续接收基站发送的该组播业务数据包,而在确定已成功接收该组播业务数据包标识相对应的组播业务数据包时,终端就可以忽略基站传输的该组播业务数据包,不做任何处理。通过这种方式,可以避免终端重复接收已经接收成功的组播业务数据包,降低了终端的开销。
可选的,在第四方面的一种可能的实施方式中,所述处理器,用于根据所述第一指示信息,确定所述组播业务数据包的标识相对应的组播业务数据包是否已经被成功接收,具体为:所述处理器,具体用于判断已记录的组播业务数据包的标识中是否包含所述组播业务数据包的标识,并在判断已记录的组播业务数据包的标识中不包含所述组播业务数据包的标识时,确定未成 功接收所述组播业务数据包的标识相对应的组播业务数据包。
上述第四方面以及第四方面的各可能的实施方式所提供的终端,其有益效果可以参见上述第一方面和第一方面的各可能的实施方式所带来的有益效果,在此不再赘述。
第五方面,本发明实施例提供一种通信系统,所述通信系统包括:上述第三方面以及第三方面的各可能的实施方式所提供的基站,以及,上述第四方面以及第四方面的各可能的实施方式所提供的终端。
通过第五方面提供的通信系统,基站在接收到核心网设备发送的组播业务数据之后,基站可以获取包括该组播业务数据的传输模式,以及传输次数的传输指示信息,以使得基站可以根据该传输指示信息,向终端多次传输该组播业务数据,同时基站还可以将该传输指示信息发送给终端,以使得终端可以根据该传输指示信息,正确的接收基站多次发送的组播业务数据。因此,本发明实施例提供的组播业务传输方法,可以在组播业务数据的数据量较大时,通过增加组播业务数据的传输次数,提高了终端成功接收组播业务数据的概率,增强了组播业务的鲁棒性。
本发明实施例提供的组播业务传输方法、终端、基站和通信系统,基站在接收到核心网设备发送的组播业务数据之后,基站可以获取包括该组播业务数据的传输模式,以及传输次数的传输指示信息,以使得基站可以根据该传输指示信息,向终端多次传输该组播业务数据,同时基站还可以将该传输指示信息发送给终端,以使得终端可以根据该传输指示信息,正确的接收基站多次发送的组播业务数据。因此,本发明实施例提供的组播业务传输方法,可以在组播业务数据数据量较大时,通过增加组播业务数据的传输次数,提高了终端成功接收组播业务数据的概率,增强了组播业务的鲁棒性。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍,显而易见地,下面描述中的附图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性的前提下,还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的一种组播业务传输方法的信令交互流程图;
图2为本发明实施例提供的一种组播业务数据的示意图;
图3为本发明实施例提供的另一种组播业务数据的示意图;
图4为本发明实施例提供的又一种组播业务数据的示意图;
图5为本发明实施例提供的另一种组播业务传输方法的信令交互流程图;
图6为本发明实施例提供的又一种组播业务传输方法实施例三的信令交互流程图;
图7为本发明实施例提供的一种基站的结构示意图;
图8为本发明实施例提供的一种终端的结构示意图;
图9为本发明实施例提供的终端为手机时的结构框图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
本发明实施例涉及的终端,可以是指向用户提供语音和/或数据连通性的设备,具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。无线终端可以经无线接入网(Radio Access Network,RAN)与一个或多个核心网进行通信,无线终端可以是移动终端,如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机,例如,可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置,它们与无线接入网交换语言和/或数据。例如,个人通信业务(PCS,Personal Communication Service)电话、无绳电话、会话发起协议(SIP)话机、无线本地环路(WLL,Wireless Local Loop)站、个人数字助理(PDA,Personal Digital Assistant)等设备。无线终端也可以称为系统、订户单元(Subscriber Unit)、订户站(Subscriber Station),移动站(Mobile Station)、移动台(Mobile)、远程站(Remote Station)、接入点(Access Point)、远程终端(Remote Terminal)、接入终端(Access Terminal)、用户终端(User Terminal)、用户代理(User Agent)、 用户设备(User Device)、或用户装备(User Equipment)本发明实施例中的终端,在NB-IoT中还可以为智能电表、智能水表等。
本发明实施例涉及的基站,可以是指接入网中在空中接口上通过一个或多个扇区与无线终端通信的设备。基站可用于将收到的空中帧与IP分组进行相互转换,作为无线终端与接入网的其余部分之间的路由器,其中接入网的其余部分可包括网际协议(IP)网络。基站还可协调对空中接口的属性管理。例如,基站可以是GSM或CDMA中的基站(BTS,Base Transceiver Station),也可以是WCDMA中的基站(NodeB),还可以是LTE中的演进型基站(NodeB或eNB或e-NodeB,evolutional Node B),本发明实施例并不限定。
本发明实施例提供的组播业务传输方法,可以适用于部署在任一通信系统上的NB-IoT中基站和终端。其中,这里所说的通信例如可以为2G通信系统、3G通信系统、LTE通信系统、5G通信系统等。
以部署在LTE系统中的NB-IoT为例,核心网设备在通过基站向小区中的每个终端组播某一组播业务数据时,基站可以先在网络层将该业务数据拆分成多个分组数据汇聚协议(Packet Data Convergence Protocol,简称:PDCP)服务数据单元(Service Data Unit,简称:SDU)包,然后根据传输块(Transport Block,简称:TB)的大小,在物理层将每个PDCP SDU包映射到多个TB,从而使得基站可以在物理层,通过向小区内对组播业务数据感兴趣的所有终端依次组播每个TB的方式,向终端组播该组播业务数据。
现有技术中,基站支持的最大PDCP SDU包所能承载的数据量为1.5kB,针对NB-IoT基站支持的最大TB为680比特。若基站向终端组播的某一组播业务数据的数据量较大,以200kB为例,此时,基站即便采用最大PDCP SDU包对组播业务数据进行拆分,且以最大的TB映射每个PDCP SDU包,每个PDCP SDU包仍会映射到约20个TB上。但是,基站在以20个TB向终端传输软件升级业务的每个PDCP SDU时,终端所接收到的20个TB中至少有一个解错的概率大约有87%,因此,对于终端来说,PDCP SDU包接收失败的概率较大,致使组播业务数据接收失败的概率较大。因此,基站在向终端传输上述组播业务数据时,如何向终端重复传输上述组播业务数据,以使终端可以成功接收组播业务数据,是个亟待解决的问题。
本发明实施例提供的组播业务传输方法,旨在解决现有技术中在组播业务数据数据量较大时,基站如何向终端传输组播业务数据,以增强组播业务的鲁棒性的技术问题。
下述申请文件以部署在LTE系统中的NB-IoT的基站和终端为例,来对本发明实施例提供的组播业务传输方法进行说明,但是,本领域技术人员可以理解的是,本发明实施例所涉及的组播业务传输方法,包括但不限于以上应用场景和设备,只要涉及传输组播业务数据的场景和设备,均可以采用本发明实施例所提供的组播业务传输方法。
下面以具体地实施例对本发明的技术方案进行详细说明。下面这几个具体的实施例可以相互结合,对于相同或相似的概念或过程可能在某些实施例不再赘述。
图1为本发明实施例提供的一种组播业务传输方法的信令交互流程图。本实施例一涉及的是基站根据所获取的组播业务的传输指示信息,向终端传输组播业务数据的具体过程。如图1所示,该方法包括:
S101、基站接收核心网设备发送的组播业务数据。
具体的,当核心网设备需要通过基站向小区覆盖范围内的每个终端传输某一业务时,基站就可以接收到核心网设备发送的组播业务数据。其中,上述组播业务数据可以为数据量较大的组播业务数据,例如可以为软件升级业务、应急通知业务等。在本实施例中,上述所说的核心网设备例如可以为应用服务器、核心网服务器网关,移动性管理实体等。
S102、基站获取该组播业务的传输指示信息。
具体的,上述基站在接收到核心网设备发送的组播业务数据之后,基站就可以获取包括该组播业务数据的传输模式,以及,传输次数的传输指示信息。其中,上述组播业务数据的传输模式用于表示基站采用何种重复传输单位向终端重复传输上述组播业务数据。这里所说的重复传输单位例如可以是传输块(Transport Block,简称TB),也可以是整个组播业务数据(Multicast Session),也可以是多个TB级联成的一个分段(Segment),还可以是以上任意两种的结合,或全部三种的结合,具体可以根据需求设置。
上述组播业务数据的传输次数用于表示基站在传输信道上将每个重复传输单位向终端传输几次。这里所说的传输信道例如可以为单小区多播业务传 输信道(Single Cell–Multicast Transport Channel,简称:SC-MTCH)。
需要说明的是,本实施例不限定基站获取组播业务的传输指示信息的方式。可选的,若上述组播业务的传输指示信息可以由基站确定,则上述基站可以根据预设的业务类型与传输指示信息之间的映射关系,以及,该组播业务数据的业务类型,确定该组播业务的传输指示信息。
上述基站还可以根据组播业务数据的相关信息,获取该组播业务的传输指示信息。这里所说的相关信息可以为组播业务数据的数据量大小、组播业务数据所涉及的终端的信道条件、用户的覆盖等级分布等。例如:若组播业务数据所涉及的终端的信道条件较好,用户的覆盖等级主要分布在较好的覆盖等级上,则组播业务的传输指示信息中的传输次数的值较小。若组播业务数据所涉及的终端的信道条件较差,用户的覆盖等级主要分布在较差的覆盖等级上,则组播业务的传输指示信息中的传输次数的值较大。具体实现时,基站可以根据历史组播业务数据统计数据和/或历史组播业务数据经验数据中的信道条件与传输次数,和/或,覆盖等级与传输次数的统计数据确定。若上述组播业务数据的数据量较小,则组播业务的传输指示信息中的重复传输单位可以为一数据量较小的传输单位;若组播业务数据的数据量较大,则组播业务的传输指示信息中的重复传输单位可以为一数据量较大的传输单位。可选的,若组播业务数据所涉及的终端的信道条件较好,用户的覆盖等级主要分布在较好的覆盖等级上,则组播业务的传输指示信息中的重复传输单位可以为一数据量较小的传输单位;若组播业务数据所涉及的终端的信道条件较差,用户的覆盖等级主要分布在较差的覆盖等级上,则组播业务的传输指示信息中的重复传输单位可以为一数据量较大的传输单位。
可选的,若上述组播业务的传输指示信息可以由核心网设备确定,则上述基站可以通过接收核心网设备发送的该组播业务的传输指示信息,来获取该组播业务的传输指示信息等。
S103、基站向终端发送传输指示信息。
具体的,基站在获取到该组播业务的传输指示信息之后,基站可以向接收该组播业务数据的终端发送该传输指示信息,以使得终端通过该传输指示信息获知基站将采用何种重复传输单位向终端发送该组播业务数据,以及基站在重复传输每个重复传输单位时,将会传输几次。
其中,本实施例不限定上述基站向终端发送传输指示信息的方式。可选的,上述基站可以将该传输指示信息单独发送给终端,还可以将该传输指示信息携带在控制信道中发送给终端等。这里所说的控制信道例如可以为多播业务控制信道(Single Cell–Multicast Control Channel,简称:SC-MCCH),还可以为物理下行控制信道(Physical Downlink Control Channel,简称:PDCCH),还可以是系统信息块(System Information Block,简称:SIB)。
以将上述传输指示信息携带在SC-MCCH中发送给终端为例,具体实现时,上述基站可以将该传输指示信息携带在SC-MCCH上的MTCH列表中发送给终端,其中,携带有传输指示信息的MTCH列表例如可以如下:
Figure PCTCN2016104768-appb-000001
其中,上述高层信令中的repetitionfactor即为传输指示信息中的传输次 数。该传输次数的取值例如可以为1至8之间的正整数。
其中,上述高层信令中的repetitionmode即为传输指示信息中的重复传输单位,示例性的,当repetitionmode的取值为1时,表示重复传输单位为TB,当repetitionmode的取值为2时,表示重复传输单位是整个组播业务数据数据(Multicast Session),当repetitionmode的取值为3时,表示重复传输单位是多个TB级联成的一个分段(Segment)。
其中,上述高层信令中的mbmsSessionInfo-r13,表示正在传输的组播业务数据的标识。上述高层信令中的g-RNTI-r13表示物理层用于加扰组播业务数据(SC-MTCH)的RNTI标识。上述高层信令中的sc-mtch-schedulingInfo-r13表示组播业务数据相关的非连续接收(Discontinuous Reception,简称DRX)信息。上述高层信令中的sc-mtch-neighbourCell-r13表示正在传输组播业务数据的邻区。
可选的,上述MTCH列表中可以包含两个repetitionfactor,其中一个用于指示本发明所述的组播业务的传输指示信息中的传输次数,另一个用于指示现有技术中的物理层传输块重复传输的次数等。
可选的,在本发明的另一实现方式中,上述SC-MCCH所指示的所有组播业务数据(即所有MTCH),可以共享相同的传输指示信息,也就是说,SC-MCCH所对应的所有的组播业务数据的重复传输模式和重复传输次数都是一样的。在这种情况下,SC-MCCH中的MTCH列表例如可以如下:
Figure PCTCN2016104768-appb-000002
Figure PCTCN2016104768-appb-000003
其中,上述代码中的各个特征所表示的含义具体可以参见上述解释。
可选的,上述MCCH列表中可以包含两个repetitionfactor,其中一个用于指示本发明所述的组播业务的传输指示信息中的传输次数,另一个用于指示现有技术中的物理层传输块重复传输的次数等。
以将上述传输指示信息携带在SIB中发送给终端为例,具体实现时,该携带有传输指示信息的SIB例如可以如下:
Figure PCTCN2016104768-appb-000004
Figure PCTCN2016104768-appb-000005
可选的,上述SIB中可以包含两个repetitionfactor,其中一个用于指示组播业务数据的传输次数,另一个用于指示物理层传输块重复传输的次数。
以将该传输指示信息中的重复因子携带在PDCCH中发送给终端为例,具体实现时,上述基站可以将该传输指示信息中的重复因子携带在PDCCH的下行控制信息(Downlink Control Information,简称:DCI)中等。此处重复因子包含上面提到的两种重复因子,即组播业务数据级别的重复因子和物理传输块级别的重复因子。
S104、终端接收该传输指示信息。
S105、基站根据该传输指示信息向终端传输组播业务数据。
具体的,当基站获取该组播业务的传输指示信息之后,基站就可以按照上述传输指示信息中所包括的传输次数,根据组播业务数据传输模式所指的重复传输单位向终端重复传输该组播业务数据,即基站按照传输次数,向终端依次重复传输每个重复传输单位。其中,基站在按照传输次数,每次传输每个重复传输单位时,该重复传输单位中所包括的数据量,以及数据量映射的TB数量等均相同,以确保基站重复传输的是同一个重复传输单位。
具体的,当基站传输组播业务数据时,基站的发射机端的无线资源链路控制(RLC,Radio Link Control)实体将一个无线资源链路控制服务数据单元(SDU,Service Data Unit)重复传输给下层一次或多次。此处下层可以是LTE协议中的媒体接入控制层(MAC,Medium Access Control);重复传输的次数如前所述,可以由物理层下行控制信息指示或者系统消息(SIB)中的参数指示。基站的发射机端的无线资源链路控制实体按照如下的方式将一个无线资源链路控制服务数据单元(RLC SDU)处理成无应答模式数据的协议数据单元(UMD PDU,Unacknowledged Mode Data Protocol Data Unit):
步骤1:无线资源链路控制(RLC)实体将RLC SDUs分段和/或重组成一个或多个UMD PDU,使得每个UMD PDU的大小适合于媒体接入控制层指示的RLC PDU的大小。
步骤2:RLC实体在每一个UMD PDU上加上相应的RLC包头。
通过以上步骤,RLC实体将一个或多个无线资源链路控制服务数据单元(RLC SDU)处理成一个或多个无线资源链路控制协议数据单元(RLC  PDU)。在一些实施例中,RLC实体处理RLC SDU时可以将上述步骤调换顺序。
当一个RLC SDU需要重传时,RLC按照该RLC SDU初传时的分段/重组方式将该RLC SDU分段/重组成一个或多个UMD PDU。
每一个新的UMD PDU传输到媒体接入控制层时,发射机RLC实体需要给这些UMD PDU按序加上序号,具体的操作方式如下:
步骤1:设置该UMD PDU的序列号(SN,Sequence Number)为参数VT(US),并且参数VT(US)加一;
步骤2:存储每一个UMD PDU对应的序列号和相应的参数VT(US)的值;
当RLC实体将一个UMD PDU重复传输到媒体接入控制层时,该发射机RLC实体需要按照如下方式操作:
RLC实体将UMD PDU的序列号(SN,Sequence Number)设置为参数VT(US),并且参数VT(US)加一。该序列号等于之前发射机存储的相应的序列号。
其中对于每一个RLC SDU(s)的初传和重传,该RLC SDU的分段和/或重组方式均保持一致,相应的每一个初传和重传的UMD PDU的序列号保持一致。
S106、终端根据该传输指示信息,接收基站传输的组播业务数据。
具体的,终端在接收到基站发送的传输指示信息之后,就可以在基站向终端传输该组播业务数据时,根据该传输指示信息所包括的传输次数,以及传输模式中所指的重复传输单位,正确接收基站多次重复传输的组播业务数据,可以避免终端将基站重复传输的组播业务数据认为是新的组播业务数据的情况。
本发明实施例提供的组播业务传输方法,基站在接收到核心网设备发送的组播业务数据之后,基站可以获取包括该组播业务数据的传输模式,以及传输次数的传输指示信息,以使得基站可以根据该传输指示信息,向终端多次传输该组播业务数据,同时基站还可以将该传输指示信息发送给终端,以使得终端可以根据该传输指示信息,正确的接收基站多次发送的组播业务数据。因此,本发明实施例提供的组播业务传输方法,可以在组播业务数据数据量较大时,通过增加组播业务数据的传输次数,提高了终端成功接收组播 业务数据的概率,增强了组播业务的鲁棒性。
进一步地,在上述实施例的基础上,上述基站所接收到的组播业务数据可以包括:多个组播业务数据单元(即PDCP SDU包),每个组播业务数据单元包括至少一个组播业务数据包。其中,上述组播业务数据单元可以为基站在网络层拆分组播业务数据的最小单位。上述每个组播业务数据单元所包括的组播业务数据包可以是一个TB,还可以是一个分段,具体可以根据用户的需求设定。这里分段可以为大于等于一个TB,小于等于一个PDCP SDU包的单位,例如:2个级联的TB等,具体可以由基站和/或高层配置确定。
在本实施例中,上述组播业务数据单元的数量可以由基站确定。具体实现时,上述基站可以根据预设的组播业务数据单元所承载的数据量,以及组播业务数据的数据量,确定该组播业务数据的组播业务数据单元的数量。可选的,基站还可以根据预设的业务类型与组播业务数据单元所承载的数据量的映射关系,以及,该组播业务数据的业务类型,确定该组播业务数据的组播业务数据单元的数量。可选的,基站还可以根据预设的组播业务数据数据量与组播业务数据单元所承载的数据量,以及,该组播业务数据的数据量,确定该组播业务数据的组播业务数据单元的数量,具体可以根据用户的需求确定。
进一步地,在上述实施例的基础上,本实施例涉及的是上述基站根据传输指示信息向终端传输组播业务数据的具体过程。在本实施例中,上述S105具体可以分为如下几种情况:
第一种情况:上述组播业务数据的传输模式为:基站以组播业务数据的全部数据为重复传输单位向终端传输组播业务数据。则上述S105可以包括:基站按照传输次数,以组播业务数据的全部数据为重复传输单位,向终端重复传输组播业务数据。
具体的,当上述基站根据以组播业务数据的全部数据为重复传输单位向终端传输组播业务数据的传输模式,向终端重复传输组播业务数据时,基站可以以该组播业务数据的全部数据为重复传输单位向终端重复传输组播业务数据,也就是说,基站向终端传输完该组播业务数据的所有数据之后,才会再向终端重新传输该组播业务数据的所有数据,以此重复,直至达到传输次数为止。相应地,终端在接收到基站发送的包括有上述组播业务数据的传输 模式的传输指示信息后,终端可以根据该传输模式获知,终端可以以组播业务数据的全部数据为重复传输单位接收基站传输的组播业务数据。这样,终端在根据传输指示信息,接收基站传输的组播业务数据时,就可以按照传输次数,以组播业务数据的全部数据为重复传输单位,接收基站重复传输的组播业务数据。
图2为本发明实施例提供的一种组播业务数据的示意图,如图2所示,以组播业务数据包括N个组播业务数据单元(即PDCP SDU),每个组播业务数据单元包括k个组播业务数据包(在本示例中组播业务数据包为TB)为例,假定上述传输指示信息包括的上述组播业务数据的传输模式为:基站以组播业务数据的全部数据为重复传输单位向终端传输组播业务数据,传输次数为4次。则上述基站根据该传输指示信息向终端传输组播业务数据具体可以为:基站按照该组播业务数据的每个PDCP SDU的顺序,以及每个PDCP SDU中的TB的顺序,将该组播业务数据的所有TB依次传输给终端之后,再按照该组播业务数据的每个PDCP SDU的顺序,以及每个PDCP SDU中的TB的顺序,将该组播业务数据的所有TB再次依次传输给终端,直至传输次数达到4次为止。相应地,终端在根据该传输指示信息接收组播业务数据时,就可以以组播业务数据的全部数据为重复传输单位来进行接收,而不会存在分不清哪个是重复传输的数据,确保了基站在向终端多次传输同一组播业务数据时,终端可以正确的接收多次传输的组播业务数据。
第二种情况:上述组播业务数据的传输模式为:基站以组播业务数据单元为重复传输单位向终端传输组播业务数据。则上述S105可以包括:基站按照传输次数,以组播业务数据单元为重复传输单位,向终端重复传输组播业务数据。
具体的,当上述基站根据以组播业务数据单元为重复传输单位向终端传输组播业务数据的传输模式,向终端重复传输组播业务数据时,基站可以以该组播业务数据的组播业务数据单元为重复传输单位向终端重复传输组播业务数据。也就是说,基站在向终端传输完该组播业务数据的一个组播业务数据单元之后,就会向终端重复传输该组播业务数据单元,直至达到传输次数为止,然后基站继续采用这种方式,向终端传输该组播业务数据的下一个组播业务数据单元,直至向终端传输完该组播业务数据的所有组播业务数据单 元。相应地,终端在接收到基站发送的包括有上述组播业务数据的传输模式的传输指示信息后,终端可以根据该传输模式获知,终端可以以组播业务数据单元为重复传输单位接收基站传输的组播业务数据。这样,终端在根据传输指示信息,接收基站传输的组播业务数据时,就可以按照传输次数,以组播业务数据单元为重复传输单位,接收基站重复传输的组播业务数据。
图3为本发明实施例提供的另一种组播业务数据的示意图,如图3所示,图3示出的是组播业务数据的其中一个组播业务数据单元PDCP SDU1,假定该组播业务数据单元包括k个组播业务数据包(在本示例中组播业务数据包为TB),则当上述传输指示信息包括的上述组播业务数据的传输模式为:基站以组播业务数据单元为重复传输单位向终端传输组播业务数据,传输次数为4次时,上述基站根据该传输指示信息向终端传输组播业务数据具体可以为:基站按照该组播业务数据单元的每个TB的顺序,将该组播业务数据单元的TB1-TBk依次传输给终端之后,再按照该组播业务数据单元的每个TB的顺序,将该组播业务数据单元的TB1-TBk再次依次传输给终端,直至传输次数达到4次,基站才会继续采用这种方式向终端继续传输该组播业务数据的下一个组播业务数据单元。相应地,终端在根据该传输指示信息接收组播业务数据时,就可以以组播业单元为重复传输单位来进行接收,而不会存在分不清当前传输的是哪个组播业务数据单元的数据,确保了基站在向终端多次传输同一组播业务数据时,终端可以正确的接收该组播业务数据。
第三种情况:上述组播业务数据的传输模式为:基站以组播业务数据包为重复传输单位向终端传输组播业务数据。则上述S105可以包括:基站按照传输次数,以组播业务数据包为重复传输单位,向终端重复传输组播业务数据。
具体的,当上述基站根据以组播业务数据包为重复传输单位向终端传输组播业务数据的传输模式,向终端重复传输组播业务数据时,基站可以以该组播业务数据的组播业务数据包为重复传输单位向终端重复传输组播业务数据。也就是说,基站在向终端传输完该组播业务数据的一个组播业务数据包之后,就会向终端重复传输该组播业务数据包,直至达到传输次数为止,然后基站继续采用这种方式,向终端传输该组播业务数据的下一个组播业务数据包,直至向终端传输完该组播业务数据的所有组播业务数据包。相应地, 终端在接收到基站发送的包括有上述组播业务数据的传输模式的传输指示信息后,终端可以根据该传输模式获知,终端可以以组播业务数据包为重复传输单位接收基站传输的组播业务数据。这样,终端在根据传输指示信息,接收基站传输的组播业务数据时,就可以按照传输次数,以组播业务数据包为重复传输单位,接收基站重复传输的组播业务数据。
以上述组播数据包为一个TB为例,图4为本发明实施例提供的又一种组播业务数据的示意图,如图4所示,图4示出的是组播业务数据的其中一个组播业务数据单元PDCP SDU1,假定该组播业务数据单元包括k个组播业务数据包(在本示例中组播业务数据包为TB),则当上述传输指示信息包括的上述组播业务数据的传输模式为:基站以组播业务数据包为重复传输单位向终端传输组播业务数据,重复传输次数为3次时,上述基站根据该传输指示信息向终端传输组播业务数据具体可以为:基站按照该组播业务数据单元的每个TB的顺序,将该组播业务数据单元的TB1传输给终端之后,就重复向终端传输该TB1,直至重复传输次数达到3次,基站才会继续采用这种方式向终端继续传输该组播业务数据单元的下一个组播业务数据包,即TB2,直至向终端传输完最后一个组播业务数据单元的最后一个组播业务数据包。相应地,终端在根据该传输指示信息接收组播业务数据时,就可以以组播业务数据包为重复传输单位来进行接收,而不会存在分不清哪个是重复传输的数据,确保了基站在向终端多次传输同一组播业务数据时,终端可以正确的接收多次传输的组播业务数据。
终端接收组播数据时,接收机端无线资源链路控制(RLC,Radio Link Control)实体处理RLC PDU的方式与之前LTE中的UM模式一致,此处不再累述。
本发明实施例提供的组播业务传输方法,基站在获取到包括该组播业务数据的传输模式,以及传输次数的传输指示信息之后,基站可以根据该传输指示信息,向终端多次传输该组播业务数据,同时基站还可以将该传输指示信息发送给终端,以使得终端可以根据该传输指示信息,正确的接收基站多次发送的组播业务数据,而不会存在分不清哪个是重复传输的数据。因此,本发明实施例提供的组播业务传输方法,在实现了向终端多次传输同一组播业务数据的基础上,确保终端可以正确的接收该被传输多次的组播业务数 据,提高了终端成功接收组播业务数据的概率,增强了组播业务的鲁棒性。
图5为本发明实施例提供的另一种组播业务传输方法的信令交互流程图。本实施例二涉及的是基站根据传输指示信息,向终端发送第一指示信息和第一指示信息所指示的组播业务数据包的具体过程。如图5所示,上述S105和S106还可以用如下步骤替换,具体地:
S201、基站根据传输指示信息,向终端发送第一指示信息和第一指示信息所指示的组播业务数据包。
具体的,在本实施例中,基站在根据传输指示信息,向终端发送组播业务数据之前,基站还可以根据组播业务数据包的个数,为组播业务数据的每个组播业务数据包生成该组播业务数据包对应的第一指示信息。其中,该第一指示信息用于指示组播业务数据包的标识,以使得终端在接收该组播业务数据包时,可以根据该第一指示信息获知当前所接收到的组播业务数据包是哪个组播业务数据包。
上述组播业务数据包的标识可以为基站分配的,具体实现时,若上述组播业务数据的传输模式为:基站以组播业务数据的全部数据为重复传输单位向终端传输组播业务数据,则基站可以根据组播业务数据的所有组播业务数据包的个数,以及组播业务数据的组播业务数据包在物理层的顺序,为每个组播业务数据包分配一个编号作为该组播业务数据包的标识,并根据该组播业务数据包的标识为该组播业务数据包生成第一指示信息,从而使得终端在接收到该组播业务数据包时,可以根据该第一指示信息,确定接收的是该组播业务数据中的哪个组播业务数据包。
若上述组播业务数据的传输模式为:基站以组播业务数据单元为重复传输单位向终端传输组播业务数据,则基站可以根据组播业务数据的所有组播业务数据包的个数,以及组播业务数据的组播业务数据包在物理层的顺序,为每个组播业务数据包分配一个编号作为该组播业务数据包的标识,还可以根据每个组播业务数据单元的所有组播业务数据包的个数,以及该组播业务数据单元中的各组播业务数据包在物理层的顺序,为该组播业务数据单元的每个组播业务数据包分配一个编号作为该组播业务数据包的标识,并根据该组播业务数据包的标识为该组播业务数据包生成第一指示信息,从而使得终端在接收到该组播业务数据包时,可以根据该第一指示 信息,确定接收的是该组播业务数据单元中的哪个组播业务数据包。
可选的,若上述组播业务数据包为一个TB,则上述第一指示信息用于指示该TB的标识。若上述组播业务数据包为一个分段,且该分段包括多个TB,则该分段中的所有TB对应同一个第一指示信息,也就是说,该分段中的所有TB的标识相同。在上述组播业务数据包为一个分段、且该分段等于组播业务数据单元时,也就是说,上述组播业务数据包为一个组播业务数据数据单元时,则该组播业务数据数据单元中的所有TB对应同一个第一指示信息,也就是说,该分段中的所有TB的标识相同。
这样,基站在为组播业务数据的每个组播业务数据包生成该组播业务数据包对应的第一指示信息之后,基站就可以根据传输指示信息,在传输该组播业务数据的每个组播业务数据包时,同时向终端传输该组播业务数据包的第一指示信息。需要说明的是,虽然这里说的是基站根据传输指示信息,向终端发送第一指示信息和第一指示信息所指示的组播业务数据包,但是并不限定上述传输指示信息中的传输模式中的重复传输单位一定是组播业务数据包,也可以是组播业务数据的全部数据,还可以是组播业务数据的组播业务数据单元(即一个PDCP SDU)。
其中,本实施例不限定基站向终端发送第一指示信息的方式。可选的,上述基站可以将该第一指示信息单独发送给终端,还可以将该第一指示信息携带在控制信道中发送给终端等。这里所说的控制信道例如可以为PDCCH。以将该第一指示信息携带在PDCCH中发送给终端为例,具体实现时,上述基站可以将该第一指示信息携带在PDCCH的下行控制信息(Downlink Control Information,简称:DCI)中发送给终端等。
S202、终端根据传输指示信息,接收基站发送的第一指示信息。
S203、终端根据第一指示信息,确定组播业务数据包的标识相对应的组播业务数据包是否已经被成功接收。
具体的,在本实施例中,终端可以根据第一指示信息,先确定组播业务数据包的标识相对应的组播业务数据包是否已经被终端成功接收,若是,则终端就不需要再次接收该组播业务数据包,若否,则终端根据传输指示信息,继续接收基站发送的组播业务数据包的标识相对应的组播业务数据包。通过这种方式,可以避免终端重复接收已经接收成功的组播业务数据包,降低了 终端的开销。
同时,由于不同终端在不同信道条件下接收成功的组播业务数据包可能不一样,因此,通过这种发送第一指示信息,以向终端指示每个组播业务数据包的方式,可以使组播业务数据所涉及的每个终端均可以使用该第一指示信息,判断自己是否已经成功接收该第一指示信息所对应的组播业务数据包。因此,在确保组播业务数据所涉及的所有终端能够成功接收组播业务数据的前提下,降低了组播业务数据所涉及的所有终端的开销。
具体实现上述S203时,终端可以通过判断已记录的组播业务数据包的标识中是否包含组播业务数据包的标识,来确定是否已经成功接收该组播业务数据包标识相对应的组播业务数据包。若是,则确定已成功接收该组播业务数据包标识相对应的组播业务数据包,则终端可以忽略基站传输的该组播业务数据包,不做任何处理。若否,则确定未成功接收组播业务数据包的标识相对应的组播业务数据包,继续执行S204。
S204、终端在确定未成功接收组播业务数据包的标识所指示的组播业务数据包时,根据传输指示信息,继续接收基站发送的组播业务数据包的标识相对应的组播业务数据包。
具体的,若终端根据第一指示信息,确定组播业务数据包的标识相对应的组播业务数据包未被成功接收,则终端可以根据传输指示信息,继续接收基站发送的组播业务数据包的标识相应的组播业务数据包。其中,终端如何根据传输指示信息,接收基站发送的组播业务数据包的标识相应的组播业务数据包,具体可以参见上述实施例,对此不再赘述。
可选的,在上述S204之后,该方法还可以包括:若终端在继续接收基站发送的组播业务数据包的标识相对应的组播业务数据包之后,确定可以成功解析该组播业务数据包,即确定成功接收该组播业务数据包的标识相对应的组播业务数据包时,终端可以记录该组播业务数据包的标识,以使得基站再次组播该组播业务数据包时,终端就可以通过自己所记录的该组播业务数据包的标识,确定已成功接收该组播业务数据包标识相对应的组播业务数据包,也就是说,终端可以忽略基站传输的该组播业务数据包,不做任何处理,以降低终端的开销。
本发明实施例提供的组播业务传输方法,基站可以为每个组播业务数据 包生成一个用于指示该组播业务数据包的标识的第一指示信息,并在根据传输指示信息向终端发送组播业务数据时,将该第一指示信息随组播业务数据包一同发送给终端,从而使得终端可以根据该第一指示信息,确定是否已成功接收该组播业务数据包,并在确定未成功接收该组播业务数据包时,才会继续接收基站发送的该组播业务数据包,而在确定已成功接收该组播业务数据包标识相对应的组播业务数据包时,终端就可以忽略基站传输的该组播业务数据包,不做任何处理。通过这种方式,可以避免终端重复接收已经接收成功的组播业务数据包,降低了终端的开销。
图6为本发明实施例提供的又一种组播业务传输方法实施例三的信令交互流程图。本实施例三涉及的是基站向终端发送组播业务通知信息的具体过程。如图6所示,该方法还可以包括:
S301、基站向终端发送组播业务通知信息。
其中,上述组播业务通知信息用于向终端指示组播业务数据的组播业务数据包的个数的。
具体的,在本实施例中,基站在根据传输指示信息向终端传输组播业务数据之前,基站还可以向终端发送组播业务通知信息,以指示该组播业务数据的组播业务数据包的个数。
其中,本实施例不限定上述基站向终端发送组播业务通知信息的方式。可选的,上述基站可以将该组播业务通知信息单独发送给终端,还可以将该组播业务通知信息携带在控制信道中发送给终端等。这里所说的控制信道例如可以为SC-MCCH,还可以为PDCCH。以将该传输指示信息携带在PDCCH中发送给终端为例,具体实现时,上述基站可以将该传输指示信息携带在PDCCH的DCI中发送给终端等。
以将该组播业务通知信息携带在SC-MCCH中发送给终端为例,具体实现时,上述基站可以将该组播业务通知信息携带在SC-MCCH上的MTCH列表中发送给终端。继续参照上述S103中所示意的SC-MCCH的MTCH列表,则在该MTCH列表的代码中,segmentnumbersize表示组播业务数据包含的组播数据包的数目,通过segmentnumbersize这个参数就可以向终端指示该组播业务数据的组播业务数据包的个数。可选的,上述MTCH还可以进一步地包括:pdcpsdunumbersize、pdcpsize、segmentsize,其中,pdcpsdunumbersize 用于表示上述组播业务数据包含的组播业务数据单元(即PDCP SDU)的数目,pdcpsize表示一个组播业务数据包PDCP SDU包含的传输块数目,segmentsize表示一个组播业务数据包包含的传输块的数目等。
S302、终端接收该组播业务通知信息。
具体的,终端在接收到该组播业务通知信息之后,可以根据其所成功接收到的组播业务数据包的数量,来判断是否已经接收完该组播业务数据的所有组播业务数据包,进而通过这种方式来确保终端可以正确的、完整的接收该组播业务数据,提高了终端成功接收组播业务数据的概率,增强了组播业务的鲁棒性。
可选的,在本发明的另一实现方式中,上述组播业务通知信息中还可以包括:每个组播业务数据包中的TB的数量,从而使得终端可以根据其所成功接收到的组播业务数据包中的TB的数量,来判断是否已经接收完该组播业务数据的每个组播业务数据包,进而通过这种方式来确保终端可以正确的、完整的接收该组播业务数据,进一步地提高了终端成功接收组播业务数据的概率,进一步地增强了组播业务的鲁棒性。
本发明实施例提供的组播业务传输方法,基站可以向终端发送组播业务通知信息,以使得终端在接收到该组播业务通知信息之后,可以根据其所成功接收到的组播业务数据包的数量,来判断是否已经接收完该组播业务数据的所有组播业务数据包,进而通过这种方式来确保终端可以正确的、完整的接收该组播业务数据,提高了终端成功接收组播业务数据的概率,增强了组播业务的鲁棒性。
本领域普通技术人员可以理解:实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。前述的程序可以存储于一计算机可读取存储介质中。该程序在执行时,执行包括上述各方法实施例的步骤;而前述的存储介质包括:ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
图7为本发明实施例提供的一种基站的结构示意图,如图7所示,该基站可以包括:接收机11、处理器12和发射机13;其中,
接收机11,用于接收核心网设备发送的组播业务数据;
处理器12,用于获取组播业务的传输指示信息;传输指示信息包括:组 播业务数据的传输模式,以及,传输次数;可选的,上述处理器12,可以根据组播业务数据的业务类型,以及,预设的业务类型与传输指示信息之间的映射关系,确定组播业务的传输指示信息,还可以控制接收机11接收核心网设备发送的组播业务的传输指示信息。
发射机13,用于向终端发送传输指示信息,并根据传输指示信息向终端传输组播业务数据。
本发明实施例提供的基站,可以用于执行上述图1所示的方法实施例中的基站所执行的步骤,其实现原理和技术效果类似,在此不再赘述。
可选的,在本发明的一种实现方式中,上述组播业务数据包括:多个组播业务数据单元,每个组播业务数据单元包括至少一个组播业务数据包;其中,组播业务数据所包括的组播业务数据单元的数量由基站确定。
则在该实现方式下,在组播业务数据的传输模式为:以组播业务数据的全部数据为重复传输单位向终端传输组播业务数据的情况下,上述发射机13,具体用于按照传输次数,以组播业务数据的全部数据为重复传输单位,向终端重复传输组播业务数据。在组播业务数据的传输模式为:以组播业务数据单元为重复传输单位向终端传输组播业务数据的情况下,上述发射机13,具体用于按照传输次数,以组播业务数据单元为重复传输单位,向终端重复传输组播业务数据。在组播业务数据的传输模式为:以组播业务数据包为重复传输单位向终端传输组播业务数据的情况下,上述发射机13,具体用于按照传输次数,以组播业务数据包为重复传输单位,向终端重复传输组播业务数据。
可选的,在本发明的另一实现方式中,上述发射机13,还可以用于向终端发送组播业务通知信息,组播业务通知信息用于向终端指示组播业务数据的组播业务数据包的个数。
本发明实施例提供的基站,可以用于执行上述图6所示的方法实施例中的基站所执行的步骤,其实现原理和技术效果类似,在此不再赘述。
上述处理器12,还用于在发射机13根据传输指示信息向终端发送组播业务数据之前,根据组播业务数据包的个数,为组播业务数据的组播业务数据包生成第一指示信息,其中,第一指示信息用于向终端指示组播业务数据包的标识;
则在这种情况下,上述发射机13,具体可以用于根据传输指示信息,向终端发送第一指示信息和第一指示信息所指示的组播业务数据包。
本发明实施例提供的基站,可以用于执行上述图5所示的方法实施例中的基站所执行的步骤,其实现原理和技术效果类似,在此不再赘述。
图8为本发明实施例提供的一种终端的结构示意图,如图8所示,该终端可以包括:接收机21和处理器22;其中,
接收机21,用于接收基站发送的传输指示信息;
处理器22,用于根据传输指示信息,控制接收机21接收基站传输的组播业务数据;传输指示信息包括:组播业务数据的传输模式,以及,传输次数。
本发明实施例提供的终端,可以用于执行上述图1所示的方法实施例中的终端所执行的步骤,其实现原理和技术效果类似,在此不再赘述。
可选的,在本发明的一种实现方式中,上述组播业务数据可以包括:多个组播业务数据单元,每个组播业务数据单元包括至少一个组播业务数据包;其中,组播业务数据包括的组播业务数据单元的数量由基站确定。
则在该实现方式下,在组播业务数据的传输模式为:以组播业务数据的全部数据为重复传输单位接收基站传输的组播业务数据的情况下,上述处理器22,具体可以用于按照传输次数,以组播业务数据的全部数据为重复传输单位,控制接收机21接收基站重复传输的组播业务数据。在组播业务数据的传输模式为:以组播业务数据单元为重复传输单位接收基站传输的组播业务数据的情况下,上述处理器22,具体可以用于按照传输次数,以组播业务数据单元为重复传输单位,控制接收机21接收基站重复传输的组播业务数据。在组播业务数据的传输模式为:以组播业务数据包为重复传输单位接收基站传输的组播业务数据的情况下,上述处理器22,具体可以用于按照传输次数,以组播业务数据包为重复传输单位,控制接收机接收基站重复传输的组播业务数据。
可选的,在本发明的另一实现方式中,接收机21,还用于接收基站发送的组播业务通知信息,组播业务通知信息用于指示组播业务数据的组播业务数据包的个数。
本发明实施例提供的终端,可以用于执行上述图6所示的方法实施例中 的终端所执行的步骤,其实现原理和技术效果类似,在此不再赘述。
上述处理器22,具体用于根据传输指示信息,控制接收机21接收基站发送的第一指示信息,并根据第一指示信息,确定组播业务数据包的标识相对应的组播业务数据包是否已经被成功接收,在确定未成功接收组播业务数据包的标识所指示的组播业务数据包时,根据传输指示信息,控制接收机21继续接收基站发送的组播业务数据包的标识相对应的组播业务数据包;其中,第一指示信息用于指示组播业务数据包的标识;第一指示信息为基站根据组播业务数据包的个数,为组播业务数据的组播业务数据包生成的指示信息。
本发明实施例提供的终端,可以用于执行上述图5所示的方法实施例中的终端所执行的步骤,其实现原理和技术效果类似,在此不再赘述。
进一步地,上述处理器22,还用于在控制接收机21继续接收基站发送的组播业务数据包的标识相对应的组播业务数据包之后,在确定成功接收组播业务数据包的标识相对应的组播业务数据包时,记录组播业务数据包的标识。
可选的,上述处理器22,具体可以用于判断已记录的组播业务数据包的标识中是否包含组播业务数据包的标识,并在判断已记录的组播业务数据包的标识中不包含组播业务数据包的标识时,确定未成功接收组播业务数据包的标识相对应的组播业务数据包。
正如上述实施例所述,本发明实施例涉及的终端可以是手机、平板电脑等无线终端,因此,以终端为手机为例:图9为本发明实施例提供的终端为手机时的结构框图。参考图9,该手机可以包括:射频(Radio Frequency,RF)电路1110、存储器1120、输入单元1130、显示单元1140、传感器1150、音频电路1160、无线保真(wireless fidelity,WiFi)模块1170、处理器1180、以及电源1190等部件。本领域技术人员可以理解,图9中示出的手机结构并不构成对手机的限定,可以包括比图示更多或更少的部件,或者组合某些部件,或者不同的部件布置。
下面结合图9对手机的各个构成部件进行具体的介绍:
RF电路1110可用于收发信息或通话过程中,信号的接收和发送,特别地,将基站的下行信息接收后,给处理器1180处理;另外,将上行的数据发 送给基站。通常,RF电路包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器(Low Noise Amplifier,LNA)、双工器等。此外,RF电路1110还可以通过无线通信与网络和其他设备通信。上述无线通信可以使用任一通信标准或协议,包括但不限于全球移动通讯系统(Global System of Mobile communication,GSM)、通用分组无线服务(General Packet Radio Service,GPRS)、码分多址(Code Division Multiple Access,CDMA)、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)、长期演进(Long Term Evolution,LTE))、电子邮件、短消息服务(Short Messaging Service,SMS)等。
存储器1120可用于存储软件程序以及模块,处理器1180通过运行存储在存储器1120的软件程序以及模块,从而执行手机的各种功能应用以及数据处理。存储器1120可主要包括存储程序区和存储数据区,其中,存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等;存储数据区可存储根据手机的使用所创建的数据(比如音频数据、电话本等)等。此外,存储器1120可以包括高速随机存取存储器,还可以包括非易失性存储器,例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
输入单元1130可用于接收输入的数字或字符信息,以及产生与手机的用户设置以及功能控制有关的键信号输入。具体地,输入单元1130可包括触控面板1131以及其他输入设备1132。触控面板1131,也称为触摸屏,可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触控面板1131上或在触控面板1131附近的操作),并根据预先设定的程式驱动相应的连接装置。可选的,触控面板1131可包括触摸检测装置和触摸控制器两个部分。其中,触摸检测装置检测用户的触摸方位,并检测触摸操作带来的信号,将信号传送给触摸控制器;触摸控制器从触摸检测装置上接收触摸信息,并将它转换成触点坐标,再送给处理器1180,并能接收处理器1180发来的命令并加以执行。此外,可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触控面板1131。除了触控面板1131,输入单元1130还可以包括其他输入设备1132。具体地,其他输入设备1132可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、 鼠标、操作杆等中的一种或多种。
显示单元1140可用于显示由用户输入的信息或提供给用户的信息以及手机的各种菜单。显示单元1140可包括显示面板1141,可选的,可以采用液晶显示器(Liquid Crystal Display,LCD)、有机发光二极管(Organic Light-Emitting Diode,OLED)等形式来配置显示面板1141。进一步的,触控面板1131可覆盖于显示面板1141之上,当触控面板1131检测到在其上或附近的触摸操作后,传送给处理器1180以确定触摸事件的类型,随后处理器1180根据触摸事件的类型在显示面板1141上提供相应的视觉输出。虽然在图9中,触控面板1131与显示面板1141是作为两个独立的部件来实现手机的输入和输入功能,但是在某些实施例中,可以将触控面板1131与显示面板1141集成而实现手机的输入和输出功能。
手机还可包括至少一种传感器1150,比如光传感器、运动传感器以及其他传感器。具体地,光传感器可包括环境光传感器及接近传感器,其中,环境光传感器可根据环境光线的明暗来调节显示面板1141的亮度,光传感器可在手机移动到耳边时,关闭显示面板1141和/或背光。作为运动传感器的一种,加速度传感器可检测各个方向上(一般为三轴)加速度的大小,静止时可检测出重力的大小及方向,可用于识别手机姿态的应用(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等;至于手机还可配置的陀螺仪、气压计、湿度计、温度计、红外线传感器等其他传感器,在此不再赘述。
音频电路1160、扬声器1161以及传声器1162可提供用户与手机之间的音频接口。音频电路1160可将接收到的音频数据转换后的电信号,传输到扬声器1161,由扬声器1161转换为声音信号输出;另一方面,传声器1162将收集的声音信号转换为电信号,由音频电路1160接收后转换为音频数据,再将音频数据输出处理器1180处理后,经RF电路1110以发送给比如另一手机,或者将音频数据输出至存储器1120以便进一步处理。
WiFi属于短距离无线传输技术,手机通过WiFi模块1170可以帮助用户收发电子邮件、浏览网页和访问流式媒体等,它为用户提供了无线的宽带互联网访问。虽然图9示出了WiFi模块1170,但是可以理解的是,其并不属于手机的必须构成,完全可以根据需要在不改变发明的本质的范围内而省略。
处理器1180是手机的控制中心,利用各种接口和线路连接整个手机的各个部分,通过运行或执行存储在存储器1120内的软件程序和/或模块,以及调用存储在存储器1120内的数据,执行手机的各种功能和处理数据,从而对手机进行整体监控。可选的,处理器1180可包括一个或多个处理单元;优选的,处理器1180可集成应用处理器和调制解调处理器,其中,应用处理器主要处理操作系统、用户界面和应用程序等,调制解调处理器主要处理无线通信。可以理解的是,上述调制解调处理器也可以不集成到处理器1180中。
手机还包括给各个部件供电的电源1190(比如电池),优选的,电源可以通过电源管理系统与处理器1180逻辑相连,从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
手机还可以包括摄像头1200,该摄像头可以为前置摄像头,也可以为后置摄像头。尽管未示出,手机还可以包括蓝牙模块、GPS模块等,在此不再赘述。
在本发明实施例中,该手机所包括的处理器1180可以用于执行上述组播业务传输方法实施例,其实现原理和技术效果类似,在此不再赘述。
本发明实施例另一方面还提供一种通信系统,该通信系统可以包括前述图7所提供的基站和图8所提供的终端,其中,上述基站可以用于执行图1、图5和图6所示的方法实施例中的基站所执行的步骤,上述终端可以用于执行图1、图5和图6所示的方法实施例中的终端所执行的步骤其实现原理和技术效果类似,此处不再赘述。
最后应说明的是:以上各实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述各实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (33)

  1. 一种组播业务传输方法,其特征在于,包括:
    接收核心网设备发送的组播业务数据;
    获取组播业务的传输指示信息,所述传输指示信息包括:所述组播业务数据的传输模式,以及,传输次数;
    向终端发送所述传输指示信息,并根据所述传输指示信息向所述终端传输所述组播业务数据数据。
  2. 根据权利要求1所述的方法,其特征在于,所述组播业务数据包括:多个组播业务数据单元,每个所述组播业务数据单元包括至少一个组播业务数据包;其中,所述组播业务数据所包括的组播业务数据单元的数量由基站确定。
  3. 根据权利要求2所述的方法,其特征在于,所述组播业务数据的传输模式为:以所述组播业务数据的全部数据为重复传输单位向所述终端传输所述组播业务数据;
    所述根据所述传输指示信息向所述终端传输所述组播业务数据,包括:
    按照所述传输次数,以所述组播业务数据的全部数据为重复传输单位,向所述终端重复传输所述组播业务数据。
  4. 根据权利要求2所述的方法,其特征在于,所述组播业务数据的传输模式为:以所述组播业务数据单元为重复传输单位向所述终端传输所述组播业务数据;
    所述根据所述传输指示信息向所述终端传输所述组播业务数据,包括:
    按照所述传输次数,以所述组播业务数据单元为重复传输单位,向所述终端重复传输所述组播业务数据。
  5. 根据权利要求2所述的方法,其特征在于,所述组播业务数据的传输模式为:以所述组播业务数据包为重复传输单位向所述终端传输所述组播业务数据;
    所述根据所述传输指示信息向所述终端传输所述组播业务数据,包括:
    按照所述传输次数,以所述组播业务数据包为重复传输单位,向所述终端重复传输所述组播业务数据。
  6. 根据权利要求2所述的方法,其特征在于,所述方法还包括:
    向所述终端发送组播业务通知信息,所述组播业务通知信息用于向所述终端指示所述组播业务数据的组播业务数据包的个数。
  7. 根据权利要求6所述的方法,其特征在于,所述根据所述传输指示信息向所述终端发送所述组播业务数据之前,还包括:
    根据所述组播业务数据包的个数,为所述组播业务数据的组播业务数据包生成第一指示信息,其中,所述第一指示信息用于向所述终端指示所述组播业务数据包的标识;
    所述根据所述传输指示信息向所述终端发送所述组播业务数据,包括:
    根据所述传输指示信息,向所述终端发送所述第一指示信息和所述第一指示信息所指示的组播业务数据包。
  8. 一种组播业务传输方法,其特征在于,包括:
    接收基站发送的传输指示信息;所述传输指示信息包括:所述组播业务数据的传输模式,以及,传输次数;
    根据所述传输指示信息,接收所述基站传输的所述组播业务数据。
  9. 根据权利要求8所述的方法,其特征在于,所述组播业务数据包括:多个组播业务数据单元,每个所述组播业务数据单元包括至少一个组播业务数据包;其中,所述组播业务数据包括的组播业务数据单元的数量由所述基站确定。
  10. 根据权利要求9所述的方法,其特征在于,所述组播业务数据的传输模式为:以所述组播业务数据的全部数据为重复传输单位接收所述基站传输的所述组播业务数据;
    所述根据所述传输指示信息,接收所述基站传输的所述组播业务数据,包括:
    按照所述传输次数,以所述组播业务数据的全部数据为重复传输单位,接收所述基站重复传输的所述组播业务数据。
  11. 根据权利要求9所述的方法,其特征在于,所述组播业务数据的传输模式为:以所述组播业务数据单元为重复传输单位接收所述基站传输的所述组播业务数据;
    所述根据所述传输指示信息,接收所述基站传输的所述组播业务数据,包括:
    按照所述传输次数,以所述组播业务数据单元为重复传输单位,接收所述基站重复传输的所述组播业务数据。
  12. 根据权利要求9所述的方法,其特征在于,所述组播业务数据的传输模式为:以所述组播业务数据包为重复传输单位接收所述基站传输的所述组播业务数据;
    所述根据所述传输指示信息,接收所述基站传输的所述组播业务数据,包括:
    按照所述传输次数,以所述组播业务数据包为重复传输单位,接收所述基站重复传输的所述组播业务数据。
  13. 根据权利要求9所述的方法,其特征在于,所述方法还包括:
    接收所述基站发送的组播业务通知信息,所述组播业务通知信息用于指示所述组播业务数据的组播业务数据包的个数。
  14. 根据权利要求13所述的方法,其特征在于,所述根据所述传输指示信息,接收所述基站传输的所述组播业务数据,包括:
    根据所述传输指示信息,接收所述基站发送的第一指示信息,其中,所述第一指示信息用于指示所述组播业务数据包的标识;所述第一指示信息为所述基站根据所述组播业务数据包的个数,为所述组播业务数据的组播业务数据包生成的指示信息;
    根据所述第一指示信息,确定所述组播业务数据包的标识相对应的组播业务数据包是否已经被成功接收;
    在确定未成功接收所述组播业务数据包的标识所指示的组播业务数据包时,根据所述传输指示信息,继续接收所述基站发送的所述组播业务数据包的标识相对应的组播业务数据包。
  15. 根据权利要求14所述的方法,其特征在于,所述继续接收所述基站发送的所述组播业务数据包的标识相对应的组播业务数据包之后,还包括:
    在确定成功接收所述组播业务数据包的标识相对应的组播业务数据包时,记录所述组播业务数据包的标识。
  16. 根据权利要求14所述的方法,其特征在于,所述根据所述第一指示信息,确定所述组播业务数据包的标识相对应的组播业务数据包是否已经 被成功接收,包括:
    判断已记录的组播业务数据包的标识中是否包含所述组播业务数据包的标识,若已记录的组播业务数据包的标识中未包含所述组播业务数据包的标识,则确定未成功接收所述组播业务数据包的标识相对应的组播业务数据包。
  17. 一种基站,其特征在于,所述基站包括:
    接收机,用于接收核心网设备发送的组播业务数据;
    处理器,用于获取所述组播业务的传输指示信息;所述传输指示信息包括:所述组播业务数据的传输模式,以及,传输次数;
    发射机,用于向终端发送所述传输指示信息,并根据所述传输指示信息向所述终端传输所述组播业务数据。
  18. 根据权利要求17所述的基站,其特征在于,所述组播业务数据包括:多个组播业务数据单元,每个所述组播业务数据单元包括至少一个组播业务数据包;其中,所述组播业务数据所包括的组播业务数据单元的数量由所述基站确定。
  19. 根据权利要求18所述的基站,其特征在于,在所述组播业务数据的传输模式为:以所述组播业务数据的全部数据为重复传输单位向所述终端传输所述组播业务数据的情况下,所述发射机,具体用于按照所述传输次数,以所述组播业务数据的全部数据为重复传输单位,向所述终端重复传输所述组播业务数据。
  20. 根据权利要求18所述的基站,其特征在于,在所述组播业务数据的传输模式为:以所述组播业务数据单元为重复传输单位向所述终端传输所述组播业务数据的情况下,所述发射机,具体用于按照所述传输次数,以所述组播业务数据单元为重复传输单位,向所述终端重复传输所述组播业务数据。
  21. 根据权利要求18所述的基站,其特征在于,在所述组播业务数据的传输模式为:以所述组播业务数据包为重复传输单位向所述终端传输所述组播业务数据的情况下,所述发射机,具体用于按照所述传输次数,以所述组播业务数据包为重复传输单位,向所述终端重复传输所述组播业务数据。
  22. 根据权利要求18所述的基站,其特征在于,所述发射机,还用于向所述终端发送组播业务通知信息,所述组播业务通知信息用于向所述终端指 示所述组播业务数据的组播业务数据包的个数。
  23. 根据权利要求22所述的基站,其特征在于,
    所述处理器,还用于在所述发射机根据所述传输指示信息向所述终端发送所述组播业务数据之前,根据所述组播业务数据包的个数,为所述组播业务数据的组播业务数据包生成第一指示信息,其中,所述第一指示信息用于向所述终端指示所述组播业务数据包的标识;
    所述发射机,具体用于根据所述传输指示信息,向所述终端发送所述第一指示信息和所述第一指示信息所指示的组播业务数据包。
  24. 一种终端,其特征在于,所述终端包括:
    接收机,用于接收基站发送的传输指示信息;
    处理器,用于根据所述传输指示信息,控制所述接收机接收所述基站传输的所述组播业务数据;所述传输指示信息包括:所述组播业务数据的传输模式,以及,传输次数。
  25. 根据权利要求24所述的终端,其特征在于,所述组播业务数据包括:多个组播业务数据单元,每个所述组播业务数据单元包括至少一个组播业务数据包;其中,所述组播业务数据包括的组播业务数据单元的数量由所述基站确定。
  26. 根据权利要求25所述的终端,其特征在于,在所述组播业务数据的传输模式为:以所述组播业务数据的全部数据为重复传输单位接收所述基站传输的所述组播业务数据的情况下,所述处理器,具体用于按照所述传输次数,以所述组播业务数据的全部数据为重复传输单位,控制所述接收机接收所述基站重复传输的所述组播业务数据。
  27. 根据权利要求25所述的终端,其特征在于,在所述组播业务数据的传输模式为:以所述组播业务数据单元为重复传输单位接收所述基站传输的所述组播业务数据的情况下,所述处理器,具体用于按照所述传输次数,以所述组播业务数据单元为重复传输单位,控制所述接收机接收所述基站重复传输的所述组播业务数据。
  28. 根据权利要求25所述的终端,其特征在于,在所述组播业务数据的传输模式为:以所述组播业务数据包为重复传输单位接收所述基站传输的所述组播业务数据的情况下,所述处理器,具体用于按照所述传输次数,以所 述组播业务数据包为重复传输单位,控制所述接收机接收所述基站重复传输的所述组播业务数据。
  29. 根据权利要求25所述的终端,其特征在于,所述接收机,还用于接收所述基站发送的组播业务通知信息,所述组播业务通知信息用于向所述终端指示所述组播业务数据的组播业务数据包的个数。
  30. 根据权利要求29所述的终端,其特征在于,所述处理器,具体用于根据所述传输指示信息,控制所述接收机接收所述基站发送的第一指示信息,并根据所述第一指示信息,确定所述组播业务数据包的标识相对应的组播业务数据包是否已经被成功接收,在确定未成功接收所述组播业务数据包的标识所指示的组播业务数据包时,根据所述传输指示信息,控制所述接收机继续接收所述基站发送的所述组播业务数据包的标识相对应的组播业务数据包;
    其中,所述第一指示信息用于指示所述组播业务数据包的标识;所述第一指示信息为所述基站根据所述组播业务数据包的个数,为所述组播业务数据的组播业务数据包生成的指示信息。
  31. 根据权利要求30所述的终端,其特征在于,所述处理器,还用于在控制所述接收机继续接收所述基站发送的所述组播业务数据包的标识相对应的组播业务数据包之后,在确定成功接收所述组播业务数据包的标识相对应的组播业务数据包时,记录所述组播业务数据包的标识。
  32. 根据权利要求30所述的终端,其特征在于,所述处理器,具体用于判断已记录的组播业务数据包的标识中是否包含所述组播业务数据包的标识,并在判断已记录的组播业务数据包的标识中不包含所述组播业务数据包的标识时,确定未成功接收所述组播业务数据包的标识相对应的组播业务数据包。
  33. 一种通信系统,其特征在于,所述通信系统包括:如权利要求17-23任一项所述的基站,以及,如权利要求24-32任一项所述的终端。
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