WO2018028497A1 - Procédé et dispositif de transmission pour service de multidiffusion - Google Patents

Procédé et dispositif de transmission pour service de multidiffusion Download PDF

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Publication number
WO2018028497A1
WO2018028497A1 PCT/CN2017/095815 CN2017095815W WO2018028497A1 WO 2018028497 A1 WO2018028497 A1 WO 2018028497A1 CN 2017095815 W CN2017095815 W CN 2017095815W WO 2018028497 A1 WO2018028497 A1 WO 2018028497A1
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WIPO (PCT)
Prior art keywords
data packet
information
service data
mbms service
scheduling
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PCT/CN2017/095815
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English (en)
Chinese (zh)
Inventor
艾建勋
戴博
陈宪明
余媛芳
Original Assignee
中兴通讯股份有限公司
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Priority claimed from CN201610956883.2A external-priority patent/CN107734606B/zh
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2018028497A1 publication Critical patent/WO2018028497A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to, but is not limited to, a communication technology, and in particular, to a method and an apparatus for transmitting a multicast service.
  • SC-PTM single cell point-to-multipoint
  • MBMS multimedia broadcast multicast service
  • SC-MCCH Single Cell-Multicast Control Channel
  • SC-MTCH Single Cell-Multicast Traffic Channel
  • both the SC-MCCH and the SC-MTCH are carried by a Physical Downlink Shared Channel (PDSCH).
  • PDSCH Physical Downlink Shared Channel
  • the SC-MCCH carries control information related to the transmission of the MBMS service, including service identification and scheduling information.
  • the PDSCH Physical Downlink Shared Channel
  • the scheduling information of the SC-MCCH is indicated in the system message block 20 (SIB20), including a modification period, a repetition period, an offset, a first subframe, and a length length of the interval that may be scheduled. .
  • SIB20 system message block 20
  • These parameters define the interval of the duration in which the SC-MCCH may be scheduled, that is, the eNB (evolved Node B, base station) schedules the SC-MCCH in one of the subframes in the duration interval in which the SC-MCCH may be scheduled.
  • the modification period of the SC-MCCH indicates a boundary where the SC-MCCH message may be modified
  • the SC-MCCH repetition period is a period for scheduling the transmission of the SC-MCCH message
  • the offset refers to the repetition of the duration starting radio frame with respect to the SC-MCCH.
  • the number of offset radio frames of the periodic start radio frame, and the first subframe is duration from the first radio subframe in the start radio frame.
  • the length of the duration is the number of wireless subframes that duration continues.
  • eNB uses SC-RNTI (Single Cell-Radio) The Network Temporary Identifier (Single Cell Radio Network Temporary Identity) scrambles DCI (Downlink Control Information) in the Physical Downlink Control Channel (PDCCH).
  • SC-RNTI Single Cell-Radio
  • the Network Temporary Identifier Single Cell Radio Network Temporary Identity
  • one SC-MTCH carries one MBMS service data.
  • the scheduling information of the SC-MTCH includes: a scheduling period (period) and a starting offset, a duration time interval of the scheduled duration interval, OnDurationTimer, and a length of time that the user equipment (UE, User Equipment) waits after successfully receiving a downlink data. (drxInactivityTimerSCPTM).
  • the eNB can schedule an SC-MTCH carrying an MBMS service in any one of the radio subframes in the resource specified by the SC-MTCH scheduling information.
  • the timer that starts or restarts the drxInactivityTimerSCPTM length continues to wait for the above drxInactivityTimerSCPTM time length until the time expires or receives a new downlink data of the service.
  • the eNB scrambles the DCI of the Physical Downlink Control Channel (PDCCH) signaling of the SC-MTCH by using the allocated Radio Network Temporary Identity (G-RNTI), and each MBMS service is assigned a dedicated G- RNTI.
  • PDCCH Physical Downlink Control Channel
  • G-RNTI Radio Network Temporary Identity
  • the same PDCCH signaling and PDSCH channel data need to be repeated. Send multiple times, as shown in Figure 2.
  • the PDCCH signaling for scheduling the PDSCH in addition to indicating the time domain frequency domain resource used by the PDSCH channel and the modulation and coding scheme (MCS), the number of repeated transmissions (Repetition number) of the PDSCH is indicated, and The scheduling start time of the PDSCH is scheduled, that is, the scheduling delay, where the scheduling timing refers to the first radio subframe after the last PDCCH subframe starts to schedule the corresponding PDSCH.
  • the main purpose of NB-IoT and eMTC to introduce SC-PTM is to provide an efficient point-to-multipoint transmission technology, which is mainly used by a large number of UEs to update their software or firmware, so as to avoid a large number of UEs acquiring through dedicated channels.
  • Business data This kind of service needs to receive business data 100% correctly and reliably, otherwise the part of the received business data has no practical meaning.
  • the current mode of service transmission does not guarantee complete and accurate data reception.
  • the embodiment of the present application provides a method and an apparatus for transmitting a multicast service.
  • an embodiment of the present application provides a method for transmitting a multicast service, where the method includes:
  • the access network element schedules transmission of the MBMS service data packet carried by the N-th single-cell multicast transmission channel (SC-MTCH) on the radio interface; N is an integer greater than or equal to 2.
  • an embodiment of the present application provides a method for transmitting a multicast service, including:
  • the user equipment receives the SC-MTCH data packet sent by the access network element according to the repeated scheduling information of each MBMS service data packet.
  • the embodiment of the present application provides a method for transmitting a service, where the method includes:
  • the access network element configures a multiple transmission period (MTP) for the transport channel, and schedules one or more specific service data packets in the MTP.
  • MTP multiple transmission period
  • the embodiment of the present application provides a method for transmitting a service, where the method includes:
  • the UE receives one or more scheduling of the service data packet in one or more MTPs that schedule service data packets.
  • an embodiment of the present application provides a method for transmitting a service, where the method includes:
  • the access network element indicates the scheduling information of one or more transmissions of the specific service data packet by the dynamic scheduling signaling, so that the UE receives the specific service data packet according to the dynamic scheduling signaling.
  • the embodiment of the present application provides a method for transmitting a service, where the method includes:
  • the UE receives one or more transmissions of a specific service data packet according to the dynamic scheduling signaling sent by the access network element.
  • the embodiment of the present application provides a method for transmitting a multicast service, where the method includes:
  • the access network element indicates the feedback condition of the UE to the received service or the service that is received by the UE through the signaling, or the UE communicates to the access network element according to the feedback condition. Send feedback.
  • an embodiment of the present application provides a method for transmitting a multicast service, where the method includes:
  • the access network element indicates the scheduling parameter of the UEMBMS service data packet by signaling, where
  • the scheduling parameters include at least one of the following: a repetition factor used when scheduling an MBMS service data packet, coverage level information, a reception success rate threshold, and a reception failure rate threshold.
  • the embodiment of the present application provides a method for transmitting a multicast service, where the method includes:
  • the UE that is receiving the MBMS service, or is interested in the MBMS service compares the first coverage level information indicated by the access network element with the second coverage level information obtained by the UE, if the second coverage level information is greater than Or equal to the first coverage level information, and feedback is performed through a feedback mechanism.
  • the embodiment of the present application provides a method for transmitting a multicast service, where the method includes:
  • the access network element specifies or appoints a feedback channel resource for feedback information of the downlink scheduling transmission of the MBMS service data packet;
  • the embodiment of the present application provides a method for transmitting a multicast service, where the method includes: the UE sends feedback information to the network element of the access network according to a feedback condition sent by the network element of the access network;
  • the feedback condition includes at least one of the following: feedback threshold condition information and feedback restriction condition information.
  • the embodiment of the present application provides a method for transmitting a multicast service, where the method includes: receiving, by the UE, an access information, by using a system information block or an SC-MCCH, to indicate, by the UE, a control information of a UE receiving a service receiving state. And feeding back, according to the control information of the feedback service receiving status, the status of the UE receiving the service.
  • the embodiment of the present application provides a method for transmitting a multicast service, including:
  • the access network element receives the signaling of the information indicating the target user equipment UE of the MBMS service data packet sent by the core network element, and schedules and sends the MBMS service data packet on the wireless interface according to the information of the target UE.
  • the embodiment of the present application provides a method for transmitting a multicast service, where the method includes: the access network element sends a feedback control message, where the feedback control message is used to indicate the core network element.
  • the feedback control message is used to indicate the core network element.
  • the embodiment of the present application provides a method for transmitting a multicast service, where the method includes: receiving, by a core network element, a feedback control message sent by an access network element; wherein the feedback control message is used to indicate The access network element does not receive information of one or more MBMS service data packets in one or more synchronization sequences; the feedback control message carries the identification information of the synchronization sequence and the lost MBMS service data packet in the synchronization sequence. Identification information.
  • the embodiment of the present application provides a method for transmitting a multicast service, where the method includes: the core network element indicates, by signaling, information about a target UE that accesses a network element MBMS service data packet, so that the The access network element schedules and sends the MBMS service on the radio interface according to the information of the target UE of the MBMS service data packet.
  • the embodiment of the present application provides a method for transmitting a multicast service, where the method includes: the access network element indicates, by using signaling, information of multiple transmission resources, for one or more One or more transfers of data blocks.
  • the embodiment of the present application provides a transmission apparatus for a multicast service, where the apparatus includes:
  • the first scheduling unit is configured to schedule, on the radio interface, the transmission of the MBMS service data packet carried by the SC-MTCH for N times; wherein N is an integer greater than or equal to 2.
  • the embodiment of the present application provides a transmission apparatus for a multicast service, including:
  • a setting unit configured to specify or appoint a feedback channel resource for feedback information of a downlink scheduling transmission of the MBMS service data packet
  • the first receiving unit is configured to trigger a retransmission unit after receiving the feedback information of the downlink scheduling transmission of the MBMS service data packet on the feedback channel resource;
  • a retransmission unit configured to resend the MBMS service data packet.
  • the embodiment of the present application provides a transmission apparatus for a multicast service, where the apparatus includes:
  • a second receiving unit configured to receive control information that the access network element indicates the UE to receive the service receiving status through the system information block or the SC-MCCH;
  • the sending unit is configured to feed back, according to the control information of the feedback service receiving state, the state of the UE receiving the service.
  • the embodiment of the present application provides a service transmission apparatus, where the apparatus includes:
  • a configuration unit configured to configure an MTP for the transport channel
  • the second scheduling unit is configured to schedule one or more specific service data packets in the MTP.
  • the embodiment of the present application provides a service transmission apparatus, including:
  • a third indication unit configured to indicate, by using dynamic scheduling signaling, scheduling information of one or more transmissions of the specific service data packet, so that the UE receives the specific service data packet according to the dynamic scheduling signaling.
  • the embodiment of the present application provides a transmission apparatus for a multicast service, including:
  • Determining a unit configured to indicate by signaling, or agree with the UE, by using a protocol, the feedback condition of the UE to the received service or the service received by the UE, so that the UE sends the network element to the access network according to the feedback condition. Send feedback.
  • the embodiment of the present application provides a transmission apparatus for a multicast service, including:
  • a fourth indication unit configured to indicate, by signaling, a scheduling parameter of the MBMS service data packet, where the scheduling parameter includes at least one of: a repetition factor, an coverage level information, and a reception used when scheduling the MBMS service data packet Success rate threshold and reception failure rate threshold.
  • the embodiment of the present application provides a service transmission apparatus, including:
  • the third receiving unit is configured to receive one or more scheduling of the service data packet in one or more MTPs of the scheduled service data packet.
  • the embodiment of the present application provides a transmission apparatus for a multicast service, where the apparatus includes: a transmission unit configured to indicate, by using signaling, information of multiple transmission resources in one scheduling, for one or One or more transfers of multiple data blocks.
  • the embodiment of the present application further provides a computer readable medium storing a transmission program of a multicast service, where the transmission program is executed by a processor to implement the steps of the transmission method of any one of the first to the seventeenth aspects. .
  • the embodiment of the present application implements the repeated scheduling of service data packets on the radio interface, improves the reliability of sending and receiving service data carried by the SC-MTCH, and provides the UE with multiple opportunities for receiving.
  • the failure of data reception due to short-term interference is avoided, and the scheduling information is repeated, so that the UE that successfully receives a certain data packet can skip (not receive) subsequent repeated scheduling of the data packet, thereby saving power consumption of the UE.
  • 1 is a schematic diagram of a scheduling manner of an SC-MCCH in an LTE system
  • FIG. 2 is a schematic diagram of a scheduling manner of an SC-MTCH in LTE
  • FIG. 3 is a flowchart of a method for transmitting a multicast service according to an embodiment of the present application
  • FIG. 4 is a schematic diagram of multiple scheduling of data packets according to an embodiment of the present application.
  • FIG. 5 is a flowchart of another method for transmitting multicast services according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a retransmission mode 1 according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a retransmission mode 2 according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a retransmission mode 3 according to an embodiment of the present application.
  • FIG. 9 is a flowchart of another method for transmitting a multicast service according to an embodiment of the present application.
  • FIG. 10 is a flowchart of another method for transmitting a multicast service according to an embodiment of the present application.
  • FIG. 11 is a flowchart of another method for transmitting a multicast service according to an embodiment of the present application.
  • FIG. 12 is a flowchart of another method for transmitting multicast services according to an embodiment of the present application.
  • FIG. 13 is a flowchart of another method for transmitting multicast services according to an embodiment of the present application.
  • FIG. 14 is a flowchart of a method for transmitting a service according to an embodiment of the present application.
  • FIG. 15 is a schematic diagram of a scheduling manner according to an embodiment of the present application.
  • 16 is a schematic diagram of another scheduling manner according to an embodiment of the present application.
  • FIG. 17 is a flowchart of another method for transmitting a service according to an embodiment of the present application.
  • FIG. 18 is a schematic diagram of a scheduling manner according to an embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of a transmission apparatus of a multicast service according to an embodiment of the present application.
  • FIG. 20 is a schematic structural diagram of another transmission apparatus of a multicast service according to an embodiment of the present application.
  • FIG. 21 is a schematic structural diagram of another transmission apparatus of a multicast service according to an embodiment of the present application.
  • FIG. 22 is a schematic structural diagram of a structure of a service transmission apparatus according to an embodiment of the present application.
  • FIG. 3 is a flowchart of a method for transmitting a multicast service according to an embodiment of the present application. As shown in FIG. 3, the embodiment of the present application describes a method for transmitting a multicast service, including the following steps:
  • the access network element schedules, on the radio interface, the transmission of the MBMS service data packet carried by the SC-MTCH, where N is an integer greater than or equal to 2.
  • the access network element may indicate to the receiver that the scheduling information of the MBMS service data packet is scheduled.
  • the repeated scheduling information may include at least one of the following information:
  • the sequence number of the current scheduling whether the current scheduling is the first scheduling of the MBMS service data packet, the remaining scheduling times of the MBMS service data packet, and the number of the MBMS service data packet.
  • the repeated scheduling information may be indicated by scheduling physical downlink control channel (PDCCH) signaling of the MBMS service data packet.
  • PDCCH physical downlink control channel
  • the MBMS service data packet is numbered, and the number of the MBMS service data packet is cyclically allocated and used within the range of the number value.
  • the access network element notifies the receiving party of the number N of scheduling of the MBMS service data packet by using a system message or an SC-MCCH message.
  • the primary scheduling includes repeated transmission of the M1 secondary PDCCH and the repeated transmission of the M2 secondary PDSCH for the MBMS service data packet; both M1 and M2 are less than or equal to N.
  • the transmitting, by the radio interface, the transmission of the MBMS service data packet N times may include: for an MBMS service data packet, the access network element continuously scheduling N times of MBMS service data packets.
  • the access network element schedules M times of MBMS service data packets or up to M times of MBMS service data packets in a scheduling period of the SC-MTCH of each MBMS service data packet.
  • the network element of the access network when scheduling the MBMS service data packet, instructs to schedule the repetitive scheduling information of the MBMS service data packet;
  • the repetitive scheduling information may include at least one of the following information: the number of the sequence number of the scheduling, and whether the scheduling is MBMS.
  • the method for transmitting a multicast service in this embodiment further includes:
  • the UE receives the SC-MTCH data packet sent by the access network element according to the repeated scheduling information of each MBMS service data packet.
  • the UE When the UE successfully receives an MBMS service data packet, it does not receive the subsequent repeated scheduling of the MBMS service data packet. When the UE fails to receive the MBMS service data packet, it receives the subsequent repeated scheduling of the MBMS service data packet until the MBMS service data packet is successfully received. Or the scheduling of new MBMS service data packets is detected.
  • FIG. 4 is a schematic diagram of multiple scheduling of data packets according to an embodiment of the present application. As shown in FIG. 4, the access network element schedules the transmission of the MBMS service data packet carried by the SC-MTCH on the radio interface.
  • the network element of the access network schedules the data packet of the service
  • the data packet of the service is scheduled M times, or the data packet of the service is scheduled at most M times.
  • the M indicates the UE by signaling or through a protocol.
  • the network element of the access network When the network element of the access network schedules the data packet, it indicates that the scheduling information of the data packet is scheduled to be scheduled, and the repeated scheduling information may include at least one of the following: the number of the sequence number of the current scheduling, that is, the number of the data packet. Secondary scheduling; whether the scheduling is the first scheduled information of the data; the remaining scheduling times information of the data; the number information of the data packet.
  • the repetition scheduling information may be performed by scheduling a PDCCH carrying a PDSCH of an SC-MTCH
  • the signaling indication is indicated by the DCI scrambled by the G-RNTI.
  • each packet is numbered, the number is cyclically allocated within its range of values.
  • the eNB indicates, by using a system message or an SC-MCCH message, the number N of scheduling of each service data packet by the UE.
  • the access network element continuously schedules N times of data packets, that is, each data packet is sequentially scheduled N times in sequence.
  • the one-time scheduling described in this embodiment includes multiple repeated transmissions of at least one of the PDSCH and the PDCCH, for example, the M1 secondary PDCCH repeated transmission and the M2 secondary PDSCH repeated transmission, which constitute a primary scheduling described in this embodiment, that is, FIG. 2 Shown as one dynamic scheduling and transmission.
  • the UE may receive the SC-MTCH data packet sent by the eNB according to the repeated scheduling information of each data packet.
  • the UE successfully receives a data packet subsequent scheduling of the data packet can be ignored. Otherwise, the UE receives the repeated scheduling of the data packet until the data packet is successfully received, or until the scheduling of the new data packet is detected.
  • the UE determines that the method of successfully receiving a data packet may include one of the following:
  • the UE successfully receives the number n of the service data packet it is considered that the data packet with the data packet number n is successfully received;
  • the repeated scheduling information includes the sequence number information of the scheduling, and the UE is instructed to repeat the scheduling number N of each data packet, or the repeated scheduling information includes information about the remaining scheduling times, and the UE only needs to successfully receive one data. If any one of the N times of scheduling is scheduled, the packet is considered to be successfully received, that is, in consecutive 1 to N scheduling sequence numbers, or N to 1 remaining scheduling times, the UE only needs to successfully receive one of the schedulings. .
  • the access network element continuously schedules the service data N times, and then schedules the next SC-MTCH packet.
  • the access network element When scheduling the SC-MTCH data packet, the access network element indicates the number of the currently scheduled data packet in the PDCCH signaling DCI scrambled by the service G-RNTI, and the number is cyclically allocated within the range of the value, for example, Numbered from 0 to 7, the packet number is assigned from 0 to 7, and the loopback is then assigned from 0 to 7.
  • the UE identifies the scheduling of different data packets according to the number of the data packet.
  • the access network element indicates, by using an SC-MCCH message or a system information block, the number N of repetitions of each SC-MTCH service when scheduling the SC-MTCH service.
  • the network element Each time the access network element schedules the SC-MTCH data packet, the network element includes continuously transmitting M1 secondary PDCCH signaling and M2 secondary PDSCH channel data. This constitutes a complete scheduling and transmission of the data.
  • the UE determines whether the data packet has been successfully received according to the scheduled data packet number indicated in the received PDCCH signaling DCI. For example, the UE indicates that the data packet is n in the received DCI, and the UE has successfully received the data packet numbered n after successfully receiving the data packet numbered n-1, and the UE may ignore the PDSCH indicated by the DCI. After scheduling, the UE receives the DCI indicating that the data packet number is n+1, and the UE receives the PDSCH number n+1 according to the indication of the DCI.
  • the service data packet is repeatedly scheduled on the radio interface to improve the reliability of sending and receiving service data carried by the SC-MTCH, and provides the UE with multiple receiving opportunities to avoid data reception due to short-term interference.
  • the failure, and by repeating the scheduling information enables a UE that successfully receives a certain data packet to skip (not receive) subsequent repeated scheduling of the data packet, thereby saving power consumption of the UE.
  • the embodiment of the present application further describes a method for transmitting a multicast service, which is applicable to the UE side, and includes the following steps:
  • the receiver receives the repeated scheduling information of the MBMS service data packet, and receives the MBMS service data packet sent by the sender according to the repeated scheduling information;
  • the receiver After the receiving party successfully receives the MBMS service data packet, the receiver does not listen to the scheduling of the MBMS service data packet; when the MBMS service data packet is not received, continues to receive the foregoing according to the repeated scheduling information. The MBMS service data packet until the MBMS service data packet is successfully received or the scheduling of the new MBMS service data packet is detected.
  • the receiving party successfully receives the MBMS service data packet, which may include:
  • the number of the MBMS service data packet received by the receiver is the same as the number of the MBMS service data packet included in the repeated scheduling information; or
  • the receiver successfully receives the MBMS service data packet in a scheduling period of the MBMS service data packet.
  • the receiving party feeds back, according to the control information of the feedback service receiving state, the information that the receiver receives the success or failure of the MBMS service data packet.
  • control information may include: identifier information of a service that needs to be fed back to the receiving state, or the control information includes: identifier information of a service that needs to be fed back to the receiving state, and at least one of the following information: Uplink resource information and feedback probability factor used.
  • the uplink resource information may include:
  • a preamble in a physical random access channel PRACH
  • time domain information in which the preamble is transmitted and the number of times the preamble is transmitted
  • Radio Resource Control (RRC) message is a Radio Resource Control (RRC) message.
  • FIG. 5 is a flowchart of a method for transmitting a multicast service according to an embodiment of the present application. As shown in FIG. 5, the embodiment of the present application describes a method for transmitting a multicast service, which is applicable to an access network element side. The method includes:
  • the access network element specifies or appoints a feedback channel resource for feedback information of a downlink scheduling transmission of the MBMS service data packet;
  • the feedback information may be feedback of a scheduled transmission of the MBMS service data packet.
  • the feedback channel resource may include at least one of the following resources:
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • the time domain resource may include at least one of the following resources:
  • the resending the MBMS service data packet may include:
  • the access network element resends the MBMS service data packet when the Mth scheduling of the MBMS service data packet is scheduled; M is a preset value; or
  • the access network element only schedules the transmission of the MBMS service data packet once in each SC-MTCH scheduling period, and retransmits the MBMS service data packet in the Pth scheduling period after the first scheduling;
  • P is a pre- Set value; or,
  • the access network element schedules the transmission of the MBMS service data packet multiple times in each SC-MTCH scheduling period, and retransmits the MBMS service data packet in the Oth scheduling period after the first scheduling;
  • the access network element After receiving the failure feedback information of the current scheduling, the access network element resends the MBMS service data packet.
  • the access network element When the MB network service data packet is scheduled for the first time, the access network element indicates that the MBMS service data packet is the first transmission by scheduling the PDCCH signaling or other signaling of the MBMS service data packet, or indicates the The number of the MBMS service data packet, or the number indicating the MBMS service data packet and the first transmission.
  • the access network element When the MB network service data packet is rescheduled, the access network element indicates that the MBMS service data packet is retransmitted by scheduling PDCCH signaling or other signaling of the MBMS service data packet, or indicates the The number of the MBMS service data packet, or the number indicating the MBMS service data packet and for retransmission.
  • the access network element specifies or passes the feedback channel resource for at least one of the ACK and the NACK for the downlink scheduling transmission of the SC-MTCH packet.
  • the UE sends an ACK or NACK feedback on the feedback channel resource according to the receiving state of the downlink scheduling transmission of the SC-MTCH.
  • the network side retransmits the downlink transmission data packet according to the received NACK.
  • the ACK is an Acknowledgement, that is, the feedback of successfully receiving the scheduled data packet, and the NACK is a feedback that the scheduled data packet is not successfully received.
  • the feedback ACK and NACK refer to feedback for a scheduled transmission, that is, scheduled transmission of a data packet, signaling designation or protocol agreement for its feedback channel resource.
  • the uplink feedback resource is a shared uplink feedback resource of the UE that receives the SC-MTCH, that is, multiple UEs that receive the SC-MTCH use the feedback channel resource, and are used to feed back an ACK that receives a scheduled transmission or NACK.
  • the number of each data packet may be indicated by PDCCH signaling DCI, or other signaling.
  • the access network element may indicate whether the scheduled data packet is the first transmission or the retransmission through the PDCCH signaling DCI.
  • the feedback channel resource may include one or more of the following:
  • a physical random access channel resource including a preamble specified in a Physical Random Access Channel (PRACH) and a time domain resource that sends the preamble; as an implementation manner, by signaling or The protocol stipulates the number of times the UE repeatedly sends the preamble;
  • PRACH Physical Random Access Channel
  • the resource in the physical uplink shared channel includes a time domain and a frequency domain resource.
  • the uplink resource information further includes information about the number of repetitions of sending the PUSCH signaling.
  • PUCCH Physical Uplink Control Channel
  • the time domain resource information in the feedback channel resource may refer to one of the following situations:
  • the access network element retransmits the downlink transmission data packet according to the received feedback, and may refer to one or more of the following manners:
  • the access network element resends the data packet when the Nth scheduling is performed after scheduling the data packet, and at this time, the access network element performs the first transmission and retransmission of the data packet in the PDCCH signal.
  • DCI or other signaling indicate at least one of the following: the number of the data packet; whether the scheduling is the first transmission or the retransmission.
  • N is a protocol agreement or indicates the UE by signaling.
  • the access network first transmits the first transmission of the data packet A, and specifies the NACK resource that is fed back to receive the data packet A. If the access network receives the NACK first transmitted to the data packet A, the access network resends the data packet A in the Nth scheduling after the first transmission scheduling. When retransmitting the data packet A, the access network indicates that the scheduling is retransmission in the PDCCH signaling DCI. At this time, the UE knows that the transmission is the retransmission of the data packet A. If the UE has successfully received the first transmission of data packet A, the UE may ignore this scheduling. Otherwise, the UE receives the retransmission schedule of the data packet A.
  • the access network element only schedules the transmission of the data packet once in each SC-MTCH scheduling period, and indicates at least one of the following when the data packet is scheduled to be transmitted for the first time: for the first transmission, the coding of the data packet number.
  • the access network element resends the data packet in a subsequent Nth scheduling period.
  • the access network element indicates the number of the data packet in the PDCCH signaling DCI or other signaling, or indicates that the scheduling is retransmission.
  • N is a protocol convention or indicates the UE by signaling.
  • the access network element receives the NACK feedback of the retransmission of the data packet, scheduling the data packet again in the Nth scheduling period after the scheduling period of retransmitting the data packet, and indicating At least one of the following:
  • the packet is a retransmission, the number of the packet.
  • the access network only schedules the transmission of data packets once per SC-MTCH scheduling period.
  • the access network schedules the first transmission of packet A in the first SC-MTCH period illustrated, and specifies the NACK resource that is fed back to receive packet A. If the access network receives the NACK first transmitted to the data packet A, the access network resends the data packet A in the Nth scheduling period after the SC-MTCH scheduling period.
  • the access network When retransmitting the data packet A, the access network indicates that the scheduling is retransmission in the PDCCH signaling DCI. At this time, the UE knows that the transmission is the retransmission of the data packet A. If the UE has successfully received the first transmission of data packet A, the UE may ignore this scheduling. Otherwise, the UE receives the retransmission schedule of the data packet A.
  • the access network element schedules transmission of multiple data packets in each SC-MTCH scheduling period, and the access network element numbers number the first transmitted data packets scheduled in each SC-MTCH scheduling period, and is scheduled.
  • the number is indicated and the transmission is indicated as the first transmission.
  • the access network element resends the data packet in a subsequent Nth scheduling period of scheduling the data packet, and indicates the scheduling in a PDCCH signaling DCI that schedules the retransmitted data packet or other signaling For retransmission.
  • N is a protocol convention or indicates the UE by signaling.
  • the access network element receives the NACK feedback of the retransmission of the data packet, the data is scheduled again in the Nth scheduling period after the scheduling period of the retransmission sub-data packet.
  • Package and indicate at least one of the following: The packet is a retransmission, the number of the packet.
  • the access network schedules transmission of multiple data packets per SC-MTCH scheduling period.
  • the access network schedules the first transmission of packet A in the first SC-MTCH period illustrated, and specifies that the NACK resource of the received packet A is fed back and is numbered 1 for the packet. If the access network receives the NACK first transmitted to the data packet A, the access network resends the data packet A in the Nth scheduling period after the SC-MTCH scheduling period.
  • the access network When the data packet A is retransmitted, the access network indicates that the scheduling is retransmission in the PDCCH signaling DCI, and indicates the number 1 of the data packet. At this time, the UE knows that the transmission is the retransmission of the data packet A. If the UE has successfully received the first transmission of data packet A, the UE may ignore this scheduling. Otherwise, the UE receives the retransmission schedule of the data packet A.
  • the access network in scheduling the PDCCH signaling DCI of the data packet, or in the scheduling information, or other signaling, indicates that the scheduling is the first transmission, and indicates the data packet. Numbering.
  • the access network After receiving the NACK feedback for the scheduling, the access network re-schedules the data packet and indicates the scheduling in the re-scheduled PDCCH signaling DCI, or the scheduling information, or other signaling. Retransmitted and indicates the number of the packet.
  • the access network receives the NACK feedback for rescheduling, the same processing as the transmission of the data packet is rescheduled as above.
  • the packet numbering n which is subsequently scheduled, may be ignored and marked for retransmission.
  • This embodiment provides a feedback retransmission mechanism in single-point to multi-point downlink transmission, and provides a mechanism for multiple UEs to feed back NACK and ACK, and a mechanism for retransmitting data by the access network.
  • the resource bandwidth resource can be saved and the reliability of downlink multicast transmission can be improved.
  • FIG. 9 is a flowchart of a method for transmitting a multicast service according to an embodiment of the present application. As shown in FIG. 9, the method for transmitting a multicast service provided by this embodiment includes the following steps:
  • the UE receives an access network element, and indicates the UE by using a system information block or an SC-MCCH. Feedback control information of the service receiving state;
  • the control information of the feedback service receiving state may be used to indicate whether the UE feedback successfully receives the MBMS service data packet.
  • the control information may include: identifier information of a service that needs to be fed back to the receiving state, or the control information may include: identifier information of a service that needs to be fed back to the receiving state, and at least one of the following information: the uplink resource used by the UE to feed back Information, feedback probability factor.
  • the uplink resource information may include:
  • a preamble in the PRACH and time domain information in which the preamble is transmitted, the number of times the preamble is transmitted;
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • the time domain information may include at least one of the following information: an absolute time, a time indicated in the control information of the feedback service receiving state, and a sending time of signaling of the control information with respect to the feedback service receiving state.
  • Relative time the relative time of the stop time of the service corresponding to the feedback receiving state.
  • This embodiment provides a method for a UE to feed back a status of a received service to a network side.
  • the access network element indicates the control information of the feedback service receiving state through the system information block or the SC-MCCH, and the UE feeds back the status of the received service according to the control information of the feedback service receiving state.
  • the control information of the feedback service receiving state is used to indicate whether the UE successfully receives a certain service, including at least one of the following: successfully receiving the service, and failing to receive the service.
  • control information of the feedback service receiving status may include: The identification information of the service that receives the status of the feedback.
  • control information of the feedback service receiving state may further include uplink resource information used by the UE to feed back.
  • control information of the feedback service receiving state may further include a feedback probability factor.
  • the uplink resource information of the feedback receiving state, and the corresponding UE feedback method may include:
  • the uplink resource information includes a preamble in a physical random access channel (PRACH) and time domain information in which the preamble is transmitted.
  • PRACH physical random access channel
  • the uplink resource information may further include information that the UE repeatedly sends the preamble times.
  • the UE sends feedback according to the uplink resource information.
  • the uplink resource information includes a channel resource in a specified physical uplink control channel (PUCCH), and time domain information in which the PUCCH transmits a signal.
  • PUCCH physical uplink control channel
  • the UE transmits a feedback signal on the designated PUCCH according to the information.
  • the uplink resource information includes resources in a specified physical uplink shared channel (PUSCH), including time domain and frequency domain resource information.
  • PUSCH physical uplink shared channel
  • the uplink resource information may further include information about the number of repetitions of transmitting the PUSCH signaling.
  • the UE sends feedback according to the uplink resource information.
  • the UE initiates an RRC connection, and indicates at least one of the following: the service identifier and the receiving status of the feedback through the RRC message.
  • the UE initiates feedback within the time domain. If there is no time domain information indicating the feedback, the UE initiates an RRC connection when detecting that the reception service fails, or The UE initiates an RRC connection when detecting that the service session is stopped, or the UE initiates an RRC connection after receiving the feedback control information of the received service state.
  • the UE determines whether to initiate the feedback according to the feedback probability factor.
  • the UE selects a random number, and determines whether to initiate feedback according to the relationship between the random number and the feedback probability factor. For example, when the random number is greater than the feedback probability factor, the feedback is initiated.
  • the time domain information may include one or more of the following:
  • a relative time of the transmission time of the signaling of the control information of the feedback service reception state for example, when the control information of the feedback service reception state is received, or T time units thereafter;
  • the time domain information may be indicated by signaling or by agreement.
  • the access network element receives the feedback information of the service receiving status, and performs the following processing:
  • the core network element when the core network element initiates an MBMS service session, the MBMS session start message indicates the start of the access network element meta-session, and the core network also indicates the access network in the process.
  • the network element needs the UE to feed back the receiving status of the service, and the receiving status includes at least one of the following: successful receiving, unsuccessful receiving.
  • the access network element and the core network element obtain the feedback of the UE receiving state, so that the network can determine whether to re-initiate the service according to the feedback information.
  • FIG. 10 is a flowchart of a method for transmitting a multicast service according to an embodiment of the present application. As shown in FIG. 10, the method for transmitting a multicast service provided by this embodiment includes:
  • S1001 The access network element sends a feedback control message.
  • the core network element receives the feedback control message sent by the access network element
  • the feedback control message is used to indicate information of one or more MBMS service data packets in one or more synchronization sequences that are not received by the network element of the core network element.
  • the feedback control message may carry the identification information of the synchronization sequence; the identification information of the synchronization sequence may include timestamp information of the synchronization sequence, and identification information of the lost MBMS service data packet in the synchronization sequence.
  • the access network element may send the feedback control message by using a control plane message of the access network to the core network element or a newly added synchronization protocol control packet.
  • the identifier information of the MBMS service data packet may be at least one of the following:
  • the initial MBMS service data packet identifier, and the number of MBMS service data packets that are not continuously received starting from the starting MBMS service data packet are not continuously received starting from the starting MBMS service data packet.
  • the core network element retransmits the MBMS service data packet that is not received by the access network element based on the received feedback control message.
  • the timestamp information and the packet quantity information of the MBMS service data packet to be sent are respectively set to be sent to the first time.
  • the destination address of the IP (Internet Protocol) of the MBMS service data packet to be sent may be set as the The IP address of the incoming network element, or set to the same IP address as the first MBMS service data packet.
  • the core network element When the core network element retransmits the MBMS service data packet that is not received by the access network element, the current MBMS service data packet may be marked as a retransmitted MBMS service data packet by using one of the following methods:
  • a data packet indicating that the currently transmitted MBMS service data packet is retransmitted is defined in the format of the synchronization protocol data packet.
  • the access network element sends a feedback control message, which is used to indicate a core network element, where the access network element does not receive one or more MBMS service data packets in one or more synchronization sequences. information.
  • the feedback control message carries the identification information of the synchronization sequence, that is, the timestamp information of the synchronization sequence, and the identification information of the lost MBMS service data packet in the synchronization sequence.
  • the feedback control message may be implemented in the form of a control plane message of the access network to the core network element or a SYNC PDU without payload.
  • the identifier information of the MBMS service data packet may be one or more of the following:
  • a list and a number of MBMS service data packet identifiers that are not received by the access network where the identifier is a sequence number of the MBMS service data packet in its synchronization sequence, that is, a data packet in the SYNC PDU 1 or 2 Packet number information. If all the MBMS service data packets in the synchronization sequence are lost, only the number information of the MBMS service data packets that are not received, or the identification information of the synchronization sequence is not required to indicate any other synchronization. Sequence of MBMS service packet related information.
  • the MBMS service data packet number A1 and the number of MBMS service data packets N indicate consecutive N MBMS service data packets starting with A1.
  • the core network element receives the feedback control message, and retransmits the MBMS service data packet that is not received by the access network.
  • the timestamp information and the packet number information of the MBMS service data packet are respectively set to the timestamp when the data packet is first sent. And packet number information. That is, the core network element resends the MBMS service data packet as if the data packet was sent for the first time.
  • the core network retransmits the MBMS service that the access network element does not receive.
  • the IP address of the access network element is set to the IP address of the network element of the access network, or is set to the same IP address as the first time the MBMS service data packet is sent.
  • the core network element when the core network element retransmits the MBMS service data packet that is not received by the access network element, the core network element further marks the retransmitted MBMS service data packet as a retransmitted MBMS service data packet, and the method includes One of the following:
  • information defining one bit is used to indicate that the data packet is a retransmitted data packet.
  • one of its spare bits is set to the "resend" indication described above.
  • the access network element receives the retransmitted MBMS service data packet, and can avoid ignoring the retransmitted MBMS service data packet according to the retransmitted indication or the SYNC PDU type dedicated to resending the MBMS service data packet.
  • a new synchronization sequence
  • the core network element (BMSC (Broadcast Multicast Service Center), or MGW (Media Gateway)) transmits the MBMS service to the access network element in the manner of a synchronization sequence. data pack.
  • the synchronization sequence refers to a group of MBMS service data packets marked with the same timestamp information, and different timestamp information identifies different synchronization sequences.
  • the MBMS service data packet is marked with a packet number, which indicates the number of data packets that have been transmitted in this synchronization sequence.
  • the above MBMS service data packet is a Type 1 or Type 2 SYNC PDU (SYNC PDU type 1 or SYNC PDU type 2) in a SYNC protocol.
  • SYNC PDU type 0 and SYNC PDU type 3 are also defined, and the two SYNC PDUs are sent to the access network element after each synchronization sequence, and the timestamp information carried by it is sent before it.
  • the synchronization sequence is the same, and the carried packet number is the number of MBMS service data packets in the synchronization sequence sent before, and the total number of packet information carried therein indicates that the total number of packets is sent in a synchronization period.
  • the number of MBMS service packets is the number of MBMS service data packets in the synchronization sequence sent before.
  • the access network element When the access network element receives the data of an MBMS service sent by the core network element, the access network element can pass The timestamp information in the SYNC protocol identifies different synchronization sequences, and detects whether there is a packet loss and the MBMS service lost in the synchronization sequence by detecting the continuity of the packet identifier carried in the MBMS service data packet in the same synchronization sequence.
  • the number of packets and their identifiers and by detecting the total number of packets in SYNC PDU types 0 and 3, it is possible to detect whether there is a missing packet at the end of the synchronization sequence before the transmission of the SYNC PDU type 0 and type 3, ie Whether the last one or more MBMS service packets in the synchronization sequence are lost, and whether the entire synchronization sequence has been lost.
  • the access network element can feed back the MBMS service data packet that is not received by the feedback method provided in this embodiment, and the core network element can resend the MBMS service that is not received by the access network element.
  • the data packet avoids the situation that the data of the access network element is incomplete when the MBMS service is sent due to the loss of data packets during transmission from the core network element to the access network element. Since the MBMS is a broadcast multicast service for multiple UEs, the loss of the ground-side data packet may cause all UEs that receive the MBMS service under the access network element to fail to receive the service completely, and the integrity of the received software update is downloaded. This type of business is crucial.
  • FIG. 11 is a flowchart of a method for transmitting a multicast service according to an embodiment of the present application. As shown in FIG. 11, the method for transmitting a multicast service provided by this embodiment includes:
  • the core network element indicates, by signaling, information about a target UE of the access network element MBMS service data packet;
  • the access network element dispatches and sends an MBMS service on the radio interface according to the information of the target UE of the MBMS service data packet.
  • the target UE may be a UE that is interested in the MBMS service data packet, or a UE that is receiving the MBMS service data packet.
  • the information of the target UE may include at least one of the following:
  • the number of target UEs of the MBMS service data packet is at least one of identification information of a specific area of one threshold and information of a number of target UEs within the specific area.
  • the type of the specific area may be a cell, a tracking area (TA, Tracking Area), or an MBMS service area.
  • the core network element may obtain information about the target UE of the MBMS service data packet by:
  • Receiving coverage level information or location information sent by the UE Receiving coverage level information or location information sent by the UE.
  • the core network element generates a list of identifiers of MBMS service data packets that are of interest to the UE according to the MBMS service identifier information that is of interest to the UE.
  • the core network element obtains information about the target UE of the MBMS service data packet by the core network element receiving the MBMS session start signaling or the MBMS session update signaling sent by other core network elements. Obtaining identification information of the target UE of the MBMS service data packet in the MBMS session start signaling or the MBMS session update signaling.
  • the core network element 1 indicates the information of the target UE that accesses the network element MBMS service by signaling, and the access network element performs scheduling on the wireless interface according to the information of the target UE of the MBMS service.
  • the MBMS service is not limited to the above embodiment.
  • the target UE may refer to a UE that is interested in the MBMS service, or a UE that is receiving the MBMS service; there may be multiple target UEs of one MBMS service.
  • the target UE information of the MBMS service indicated by the access network element of the core network element may be one or more of the following situations:
  • the number of target UEs corresponding to one or more CELs in a specific area that is, a list of CELs and corresponding number of UEs, such as (CEL1, number of UEs 1), (CEL2, number of UEs 2);
  • the ratio of the UE corresponding to one or more CELs in a specific area that is, the list of CELs and corresponding target UE ratios, such as (CEL1, UE ratio 1), (CEL2, proportion of UEs) 2);
  • the number of target UEs in the MBMS service in a specific area is the number of target UEs in the MBMS service in a specific area
  • the target UE number of the MBMS service is greater than at least one of the identification information of the specific area of one threshold and the information of the number of target UEs in the specific area. For example, if the threshold is X, the number of target UEs in a specific area If the value is greater than the threshold X, the core network element 1 indicates at least one of the following: the identifier of the specific area, and the quantity information of the target UE in the specific area.
  • the threshold X is configured by using a signaling indication between the access network element and the network element of the core network, or configured by the OAM (Operation Administration and Maintenance) server to configure the parameter N for the core network element.
  • the type of the specific area may be a cell, a tracking area, or an MBMS service area.
  • the access network element may, according to the information about the target UE of the MBMS service, schedule and send the MBMS service on the radio interface, and may include: the access network element, the small area in the specific area
  • the scheduling parameter used by the MBMS service data is selected according to the information of the target UE indicated by the network element of the core network, and the scheduling parameters include but are not limited to one or more of the following: : repetition factor or repetition factor, modulation and coding scheme (MCS), transport block size (TBS, Transmit Block Size), and each MBMS service data transmission block (Transmit block, TB) in the radio interface The number of times the transmission is scheduled to be repeated.
  • MCS modulation and coding scheme
  • TBS transport block size
  • Transmit Block Size Transmit block, TB
  • the core network element 1 can obtain information about the target UE of the MBMS service in one of the following manners:
  • the UE indicates, by the non-access stratum signaling, the core network element 1, the MBMS service identity information (TMGI) of interest, and the non-access stratum signaling includes, but is not limited to, a register request message. , Attach request and Track area update request.
  • TMGI MBMS service identity information
  • the UE also reports its coverage level information (CEL) to the core network element 1.
  • CEL coverage level information
  • the UE also indicates its location information to the core network element 1, and the location information includes at least one of the following: an identifier of a cell (Cell), a tracking area (Tracking Area) identifier, and an MBMS service area (MBMS service). Area) logo.
  • Cell a cell
  • Track Area a tracking area
  • MBMS service MBMS service area
  • the UE sends the identifier information of the MBMS service that is of interest to the core network element 1 in one or more of the following situations: when the UE performs the attach procedure (Attach), the UE performs the tracking area update process. (Track Area Update), when the UE's MBMS service of interest changes, that is, when the UE adds or deletes its MBMS service of interest.
  • Attach attach procedure
  • Track Area Update when the UE's MBMS service of interest changes, that is, when the UE adds or deletes its MBMS service of interest.
  • the UE reports the MBMS service identifier of the UE to the core network element at a time, in the form of a list of the identifiers TMGI of the MBMS service of interest.
  • the core network element 1 saves the information reported by the UE, and includes at least one of the following: CEL information reported by the UE, information of the MBMS service reported by the UE, and location information reported by the UE.
  • the UE can know which UE is interested in the MBMS service A, and thus know the information of the target UE of the MBMS service A, including the following at least A: the quantity information of the target UEs, the location information of the target UEs, and the CEL information of the target UE, and according to the information, the location distribution of the target UE, the number of UE target UEs with different CELs in a specific area, and the occupied The ratio, the number of UEs in a particular area, the largest CEL in a particular area, and the average CEL.
  • the core network element 2 indicates the identification information of the MBMS service target UE in the MBMS Session start request (MBMS Session start request) or the MBMS Session Update Request (MBMS Session Update Request).
  • the target UE indicates the core network element 1 by using non-access stratum signaling (NAS signaling), which covers coverage information (Coverage Extension Level, CEL).
  • NAS signaling non-access stratum signaling
  • CEL Coverage Extension Level
  • the UE further indicates its location information to the core network element 1 through non-access stratum signaling (NAS signaling), and the location information includes at least one of the following: a cell (Cell), a tracking area (Tracking Area) ), MBMS service area (MBMS service area).
  • NAS signaling non-access stratum signaling
  • the location information includes at least one of the following: a cell (Cell), a tracking area (Tracking Area) ), MBMS service area (MBMS service area).
  • the NAS signaling may include, but is not limited to, a register request, an attach request, and a track area update request.
  • the identifier information of the target UE may refer to one or more of the following information: an operator ID of the UE, a group ID, an owner ID, and a device manufacturer identifier (Vendor ID). ), the product type identifier of the UE.
  • the core network element 1 can obtain the identification information of the UE by using one of the following methods:
  • the UE indicates the core network element 1 through the foregoing non-access network layer signaling (NAS signaling).
  • NAS signaling non-access network layer signaling
  • the UE internally stores the identifier
  • the core network element 1 is obtained from the home registration server of the UE.
  • the identity information of the UE is pre-configured in the home registration server of the UE.
  • the core network element 1 compares the identity of the MBMS service target UE indicated by the core network element 2
  • the information, and the identity information of the UE saved by the core network element can be used to know which UEs registered in the core network element 1 are the target UEs of the MBMS service, and at least the CEL information and the location information of the target UEs.
  • the core network element 1 is updated during the MBMS service, if the information of the target UE of the MBMS service changes, the core network element is updated by the MBMS session (Session)
  • the Update procedure indicates information of the target UE of the MBMS service updated by the access network element.
  • the core network element 1 may be a mobility management entity, and its functions include a control plane process of mobility management, registration, and authentication of the UE in the core network, where the core network element includes but not It is limited to the mobility management entity (MME) defined by the 3GPP protocol; the core network element 2 may be a control server of the MBMS service, and the functions thereof include a process of starting, stopping, and updating the MBMS service session, where the core network element 2 It may include, but is not limited to, a Broadcast Multicast Service Center (BMSC) as defined by the 3GPP protocol.
  • MME mobility management entity
  • BMSC Broadcast Multicast Service Center
  • the access network element can learn the target UE information of the MBMS service scheduled to be sent in the cell, so that the appropriate scheduling parameter can be selected according to the target UE information, thereby avoiding the selection of the missing UE information.
  • Reasonable parameters cause the target UE to receive too high a failure rate or waste air interface resources.
  • FIG. 12 is a flowchart of a method for transmitting a multicast service according to an embodiment of the present application. As shown in FIG. 12, the method for transmitting a multicast service provided by this embodiment includes:
  • the access network element indicates the scheduling parameter of the MBMS service data packet to the UE by using signaling, where the scheduling parameter includes at least one of the following: a repetition factor, coverage level information, and reception used when scheduling the MBMS service data packet. Success rate threshold, receiving failure rate threshold;
  • S1202 The UE that is receiving the MBMS service, or is interested in the MBMS service, compares the first coverage level information indicated by the access network element with the second coverage level information obtained by the UE, if the second coverage level The information is greater than or equal to the first coverage level information, and is fed back through a feedback mechanism.
  • the coverage level information may refer to coverage of the success rate guaranteed by the repetition factor.
  • the receiving success rate threshold refers to the success rate of the MAC PDU received by the UE when the UE receives the MBMS service data packet, or the success rate of the RLC PDU received by the UE, or the UE receives the PDCP PDU. Success rate
  • the receiving failure rate threshold is the failure rate of the MAC PDU received by the UE when the UE receives the MBMS service data packet, or the failure rate of the RLC PDU received by the UE, or the UE receives the PDCP PDU. Failure rate.
  • the UE learns the coverage level information according to the repetition factor and the mapping relationship between the repetition factor and the coverage level indicated by the protocol agreement or the signaling.
  • the access network element may indicate the scheduling parameter by an SC-MCCH message, or a System Information Block (SIB), or a PDCCH DCI that schedules an MBMS service data packet.
  • SIB System Information Block
  • the repetition factor may be used to indicate at least one of: repeating the number of transmissions on the radio interface when transmitting a transport block (TB) carrying the MBMS service data packet; repeating the physical control channel signaling DCI when scheduling the transport block The number of transmissions.
  • the UE that is receiving the MBMS service determines whether the receiving success rate reaches or exceeds the receiving success rate threshold indicated by the access network, and performs feedback through a feedback mechanism;
  • the UE that is receiving the MBMS service determines whether the reception failure rate reaches or exceeds the reception failure rate threshold indicated by the access network, and performs feedback through a feedback mechanism.
  • the receiving success rate reaches or exceeds the receiving success rate threshold, which may be that the actual receiving success rate of the UE is less than or equal to the receiving success rate threshold indicated by the access network element;
  • the UE receiving failure rate meets or exceeds the receiving failure rate threshold, which may be that the actual receiving failure rate of the UE is greater than or equal to the receiving failure rate indicated by the access network element.
  • the feedback through the feedback mechanism may include:
  • the UE performs feedback through a RRC message, and the feedback content includes the following One of the following: the feedback MBMS service identification information, the second coverage level information, the actual reception success rate of the UE, and the actual reception failure rate of the UE;
  • the UE feeds back, by the access network element, at least one of a preamble of the random access channel specified by the MBMS service and a specified feedback time domain resource.
  • the access network element indicates the scheduling parameter of the MBMS service by using the signaling
  • the scheduling parameter of the MBMS service includes, but is not limited to, at least one of the following: a repetition factor used when scheduling the MBMS service (Repetition factor), coverage level information CEL-1, reception success rate threshold, reception failure rate threshold.
  • the repetition factor may be used to indicate at least one of: the number of times of repeated transmission on the radio interface when transmitting a transport block (TB) carrying MBMS service data; and the number of repeated transmissions of physical control channel signaling DCI when scheduling the transport block .
  • the coverage level CEL-1 indicated by the network element of the access network may be the coverage level of the success rate guaranteed by the repetition factor, or the threshold for the UE to report its coverage level.
  • the success threshold of the received data packet indicated by the access network element refers to the success rate of the received MAC PDU when the UE receives the MBMS service data, or the success rate of the received RLC PDU, or The success rate of receiving PDCP PDUs;
  • the failure rate threshold of the received data packet indicated by the access network element refers to the failure rate of the received MAC PDU when the UE receives the MBMS service data, or the failure rate of the received RLC PDU, or The failure rate of receiving PDCP PDUs.
  • the UE may know the coverage level information CEL-1 from the repetition factor, and the mapping relationship between the repetition factor and the coverage level indicated by the protocol agreement or signaling. That is, the coverage level information CEL-1 may be explicitly indicated to the UE by signaling, or may be implicitly indicated to the UE by indicating a repetition factor.
  • the access network element may indicate the MBMS service scheduling parameter by using an SC-MCCH message, or a system information block (SIB), or a PDCCH DCI that schedules the MBMS service data.
  • SIB system information block
  • the UE Receiving the MBMS service, or the UE interested in the MBMS service, comparing the coverage level information CEL-1 indicated by the access network element with the coverage obtained by the measurement itself, etc.
  • the level information CEL-2 if the coverage level CEL-2 is greater than or equal to the coverage level CEL-1, the UE performs feedback through a feedback mechanism.
  • the UE that is receiving the MBMS service if its receiving success rate reaches or exceeds the receiving success rate threshold indicated by the access network, the UE feeds back through a feedback mechanism.
  • the UE receiving success rate meets or exceeds the receiving success rate threshold, which means that the actual receiving success rate of the UE is less than or equal to the receiving success rate threshold indicated by the access network element.
  • the UE that is receiving the MBMS service determines whether the reception failure rate reaches or exceeds the reception failure rate threshold indicated by the access network, and performs feedback through a feedback mechanism.
  • the UE receiving failure rate meets or exceeds the receiving failure rate threshold, which means that the actual receiving failure rate of the UE is greater than or equal to the receiving failure rate indicated by the access network element.
  • the feedback of the UE by using a feedback mechanism may include:
  • the UE performs the feedback by using the RRC message.
  • the feedback content includes but is not limited to one or more of the following: the returned MBMS service identifier information, the CEL-2, the actual receiving success rate of the UE, and the UE. Actual reception failure rate;
  • the UE feeds back, by the access network, at least one of a Preamble code of a random access channel (PRACH) specified by the MBMS service and a specified feedback time domain resource, where the UE transmits the specified by using the designated PRACH.
  • Preamble code for feedback is a Preamble code of a random access channel (PRACH) specified by the MBMS service and a specified feedback time domain resource, where the UE transmits the specified by using the designated PRACH.
  • PRACH random access channel
  • the access network updates the scheduling parameter of the MBMS service according to the feedback of the UE, and indicates the updated scheduling parameter in the signaling sent to the UE, and schedules and sends the data of the MBMS service according to the updated scheduling parameter.
  • the access network may, in the wireless interface, update the scheduling parameter of the MBMS service, and schedule the data of the MBMS service according to the updated scheduling parameter, to include the following:
  • the access network When the access network indicates the scheduling parameter by using an SC-MCCH message, the access network updates the scheduling parameter of the MBMS service in an SC-MCCH modification period, and updates the SC-MCCH modification period of the MBMS scheduling parameter. Or the next SC-MCCH modification period begins, and the MBMS service data is scheduled to be sent according to the updated scheduling parameter;
  • the access network When the access network indicates the scheduling parameter by using the system information SIB, the access network updates the scheduling parameter of the MBMS service in a system message modification period, and updates the MBMS tone.
  • the system message modification period of the degree parameter or its next system message update period begins, and the MBMS service data is scheduled to be sent according to the updated scheduling parameter;
  • the access network When the access network indicates the scheduling parameter by scheduling the PDCCH signaling DCI of the MBMS service data, the access network may indicate the updated scheduling parameter when scheduling any of the MBMS service data, and use the updated scheduling.
  • the parameter schedules the MBMS service data.
  • the UE finds that its own coverage level is greater than the coverage level or repetition factor used by the access network element to send the MBMS service, the UE's reception success rate cannot be satisfied. In this case, The UE feeds back its coverage level, and provides an opportunity for the access network element to update the used repetition factor, so that the UE can be better satisfied.
  • This method is particularly effective in scenarios where the coverage level of the UE may be dynamically changed.
  • FIG. 13 is a flowchart of a method for transmitting a multicast service according to an embodiment of the present application. As shown in FIG. 13, the method for transmitting a multicast service provided by this embodiment includes:
  • the access network element indicates by using signaling, or agrees with the UE, by using a protocol, a feedback condition of the UE to the received service or the service received by the UE;
  • S1302 The UE sends feedback information to the access network element according to the feedback condition.
  • the feedback condition may include at least one of the following: feedback threshold condition information, feedback restriction condition information.
  • the feedback threshold condition information may include at least one of the following: a failure rate threshold condition information, a UE coverage level threshold condition information, a reception failure number threshold condition information, and threshold condition information of the complete reception service data;
  • the feedback restriction condition information may include at least one of the following: feedback time period restriction condition information, feedback probability restriction condition information, feedback time interval limitation condition information, and feedback number restriction condition.
  • the access network element sets or stipulates any one of the feedback threshold conditions, and the UE satisfies at least one of the feedback threshold conditions;
  • the access network element sets or appoints any one of the above feedback restriction conditions, and the UE satisfies at least one of the feedback restriction conditions.
  • the access network element indicates the feedback condition of the received service or the service received by the UE through the signaling, or the UE sends the feedback information to the access network according to the feedback condition.
  • Network element indicates the feedback condition of the received service or the service received by the UE through the signaling, or the UE sends the feedback information to the access network according to the feedback condition.
  • the access network element may be processed according to the feedback information sent by the one or more UEs.
  • the feedback condition may include one or more of the following: feedback threshold condition information, feedback restriction condition information.
  • the feedback threshold condition information may include one or more of the following thresholds:
  • the reception failure rate may include a MAC PDU, One of the RLC PDU and PDCP PDU reception failure rates;
  • the UE coverage level threshold condition information if the UE's own coverage level is greater than or equal to the UE coverage level threshold, the UE meets the UE coverage level threshold condition;
  • the service data packet is in the form of one of a MAC PDU, an RLC PDU, and a PDCP PDU; by default, the threshold of the number of reception failures is set to 1;
  • Threshold condition information for completely receiving the service data if the UE does not successfully receive all the data packets of the service, the UE satisfies the threshold condition of the complete received service data.
  • the feedback restriction condition information may include one or more of the following:
  • the feedback time period constraint condition information that is, at least one of a start time of the UE starting to perform feedback and a time length for allowing the UE to perform feedback; if the UE initiates feedback within the feedback time period, the UE satisfies the feedback time period limitation factor;
  • the feedback probability information is used by the UE to calculate feedback Rate; if the UE calculates that its own feedback probability is greater than or equal to the feedback probability, the UE satisfies the feedback probability constraint condition;
  • the feedback time interval limitation condition information is used to indicate a minimum time interval of the two neighboring feedbacks of the UE; if the time interval of the two adjacent feedbacks of the UE to the same service is greater than or equal to the feedback The time interval, that is, the time interval of the next feedback of the UE from the last feedback is greater than or equal to the feedback time interval limit, and the UE meets the feedback time interval limitation condition;
  • the UE satisfies the Feedback limit conditions.
  • the UE that performs feedback can satisfy the following conditions:
  • the access network element sets or stipulates any one of the foregoing feedback threshold conditions, the UE satisfies at least one of the feedback threshold conditions; for example, the access network element sets the feedback threshold conditions A and B, Then the UE meets at least the feedback threshold condition A or B;
  • the UE satisfies at least one or all of the feedback restriction conditions; for example, if the access network element sets the feedback restriction conditions A and B, The UE needs to satisfy the feedback restriction conditions A and B at the same time, or the UE needs to satisfy the feedback restriction condition A or B.
  • the feedback information may include one or more of the following information:
  • the identification information of the data packet that the UE does not successfully receive, and the identification information of the service data packet includes: a sequence number (RLC SN) of the RLC PDU, a PDCP sequence number (PDCP SN), or a sequence number of the service data packet.
  • RLC SN sequence number of the RLC PDU
  • PDCP SN PDCP sequence number
  • the identifier information is a list of identifiers of data packets that have not been successfully received, or a bitmap of data packets that have not been successfully received, or a bitmap of RLC PDUs corresponding to PDCP PDUs that have not been successfully received, that is, PDCP SN, RLC PDU bitmap) indicates the identification information of the unreceived service data packet, or the bitmap of the RLC PDU corresponding to the sequence number of the service data packet that has not been successfully received, that is, the serial number of the service data packet.
  • RLC PDU bitmap to indicate no reception Identification information of the business data packet to which it is sent.
  • the UE does not successfully receive the indication of the data packet of all the service sessions, and the information is an implicit or explicit indication.
  • the implicit indication means that the type of the feedback message sent by the UE implicitly indicates that the UE is not successful.
  • the explicit indication means that the UE in the feedback message indicates that the UE does not receive all the data packets of the service successfully.
  • the UE receives the number of failed data packets, and the type of the data packet is a MAC PDU, an RLC PDU, or a PDCP PDU.
  • the feedback information further includes identifier information of the service for which the feedback is directed. If the type of the service is an MBMS service, the identification information of the service includes a TMGI, or the MBMS service is in an SC-MCCH message or an MCCH message. The index in the business list.
  • the method for reporting feedback includes feedback by one or more of the following methods or feedback resources:
  • the RRC Connection Request message in the RRC message is exemplarily defined as a cause of an RRC connection request dedicated to the feedback of the embodiment, and the feedback information is carried in the RRC Connection Request message.
  • the RRC message dedicated to the feedback is an RRC message dedicated to the feedback information, and the feedback information is carried in the dedicated RRC message.
  • MAC CE dedicated to the feedback.
  • the UE initiates a random access procedure through the PRACH.
  • the message 3 message sent by the UE is a MAC CE dedicated to carrying the feedback information.
  • the MAC CE carries the feedback information.
  • the access network element allocates a physical channel resource dedicated to transmitting feedback information of the MBMS service, including a physical random access channel resource, that is, a preamble code resource dedicated to the PRACH channel.
  • the access network element is processed according to the feedback information sent by the one or more UEs, and may include:
  • the access network element determines or updates a scheduling parameter of the service; the scheduling parameter includes part or all of the following parameters: a repetition factor (Tpetification Factor), a transmission block size (TBS), and a modulation code for scheduling the service. Scheme (MCS), number of repetitions, etc.
  • Tpetification Factor a repetition factor
  • TBS transmission block size
  • MCS modulation code for scheduling the service.
  • Scheme MCS
  • the access network element retransmits some or all of the data packets of the service.
  • the access network element may retransmit the data packet of the service at the following timing:
  • Access network retransmission timing 1 The access network starts scheduling transmission at a specific time after receiving the UE feedback information carrying the identification information of the service data packet that is not received, and the specific time is indicated by the access network by signaling .
  • the UE receives or attempts to receive retransmission data of the service from the specific time.
  • Access network retransmission timing 2 The access network element sends all the data of the service, or the access network element transmits all the data that needs to be retransmitted in the last transmission.
  • the service data that needs to be retransmitted is the data packets A and B
  • the access network element retransmits the data packets A and B after all the service data packets are transmitted for the first time.
  • the UE feedback does not receive the data packet A, and the access network element continues to schedule the transmission data packet A after resending the data packets A and B.
  • the access network element indicates the statistical information of the service of the core network element through the control plane message, where the statistical information of the service is information that the access network element combines the feedback information of one or more UEs.
  • the statistical information of the service includes: the number or proportion of UEs that have not been successfully received.
  • the access network element provides a method for the UE to feed back the service.
  • the access network optimizes the feedback content and timing of the UE by using feedback threshold conditions and feedback restriction conditions. It avoids the possibility of a large amount of feedback when a large-scale UE receives data transmission of one service at the same time, and improves the efficiency of feedback by the UE.
  • the processing performed by the feedback and the subsequent access network provides that the access network adjusts the service scheduling parameters according to the feedback content to improve the efficiency of scheduling the transmission of the service data, or retransmits part or all of the service data on the wireless interface to improve the service.
  • FIG. 14 is a flowchart of a method for transmitting a service according to an embodiment of the present application. As shown in Figure 14 The method for transmitting the service provided by the embodiment includes:
  • the access network element configures a multiple transmission period (MTP) for the transport channel, and schedules one or more specific service data packets in the MTP.
  • MTP multiple transmission period
  • S1402 The UE receives one or more scheduling of the service data packet in one or more MTPs that schedule service data packets.
  • the MTP configured for the transport channel includes a combination of one or more of the following:
  • the number of times the specific service data packet is repeatedly transmitted in the MTP is repeatedly transmitted in the MTP.
  • the offset of the starting position of the MTP can be calculated by the following formula:
  • the H-SFN is the system superframe number
  • the SFN is the system frame number
  • the mod is the modulo operation
  • L is the length of the MTP
  • the offset is the offset of the MTP start position.
  • the scheduling one of the specific service data packets in an MTP may include:
  • the multiple scheduling of the particular service data packet is in one MTP; or the specific service data packet is scheduled in multiple consecutive or non-contiguous MTPs.
  • the UE determines, according to the boundary of the MTP, the service data packet scheduled in different MTPs. Different business data packages.
  • the UE When the access network element indicates the number of times a particular service data packet is scheduled in an MTP, the UE does not receive the specific service data packet in an MTP for more than the indicated number of times.
  • the UE receives the PDCCH in the MTP, Detecting a PDCCH signaling DCI that schedules the transport channel; and receiving a PDSCH of the bearer service data indicated by the DCI according to the received PDCCH signaling DCI that schedules the transport channel.
  • the UE When the transmission channel is configured with a scheduling period, the UE receives a PDCCH at a specified location in a scheduling period of a transmission channel in the MTP to detect scheduling the transmission channel PDCCH signaling DCI.
  • the access network element configures a multiple transmission period (MTP) for the transmission channel, and schedules one or more specific data blocks in the MTP.
  • the receiving UE receives the configuration information of the multiple transmission period and receives the specific data block.
  • the MTP configured by the access network element for the transport channel may include at least: length information of the MTP.
  • the MTP may further include offset information of a starting position of the MTP, and information of the number of times of scheduling a specific data block in the MTP.
  • the offset of the starting position of the MTP can be calculated by the following formula:
  • the H-SFN is the system superframe number
  • the SFN is the system frame number
  • the mod is the modulo operation
  • L is the length of the MTP
  • the offset is the offset of the MTP start position.
  • the starting position of the MTP is H-SFN and SFN satisfying the above formula.
  • the access network schedules the specific data block in the MTP, only one specific data block is scheduled multiple times in the one MTP. That is, different data blocks of the same transport channel are not scheduled in the same MTP.
  • a particular data block is scheduled in only one MTP, ie multiple scheduling of the particular data block is scheduled in one MTP.
  • a specific data block is scheduled in a plurality of consecutive or non-contiguous MTPs.
  • the access network element indicates the information of the plurality of consecutive or non-contiguous MTPs of the receiving UE, including at least one of the following: The number information of the plurality of consecutive or non-contiguous MTPs, the location information of the plurality of consecutive or non-contiguous MTPs, and the interval size information of the plurality of discontinuous MTPs.
  • the number of times N scheduled in each MTP may indicate the receiving UE by signaling, Or through agreement.
  • the access network element scheduling a specific data block means that the access network element schedules the specific data block by means of dynamic scheduling, where the dynamic scheduling signaling includes at least PDCCH signaling DCI, and the PDCCH signaling DCI Indicates scheduling information of a PDSCH channel carrying the specific data block.
  • the scheduling of the specific data block by the access network element in the MTP means that the access network element sends a PDCCH signaling DCI for scheduling the specific data block in the MTP.
  • the access network element repeatedly transmits the PDCCH signaling DCI one or more times on the radio interface. That is, the primary scheduling includes one or more repeated transmissions of PDCCH signaling, the PDCCH signaling DCI indicating scheduling information of the PDSCH, and the primary scheduling transmission of the PDSCH includes one or more repeated transmissions.
  • the content of the particular data block remains consistent during multiple scheduling of the particular data block.
  • the transport channel is configured with a scheduling period
  • the length of the MTP is an integer multiple of a scheduling period of the transport channel, and its boundary is aligned, that is, one MTP includes an integer number of complete transport channel scheduling periods.
  • the receiving end UE receiving the specific data block means that the receiving end UE receives one or more scheduling of the specific data block in one or more MTPs that schedule the specific data block.
  • the receiving end UE combines the received signals of the multiple scheduling of the specific data.
  • the UE determines, according to the boundary of the MTP, a specific data block scheduled in different MTPs. Different specific data blocks.
  • the access network element further indicates the number of times the specific data block is scheduled in an MTP
  • the number of times the receiving end UE receives the specific data block in an MTP does not exceed the number of times, that is, the UE successfully receives
  • the UE no longer attempts to receive the data block of the transport channel in the MTP.
  • the receiving UE when the transport channel adopts dynamic scheduling, receives a PDCCH in the MTP to detect a PDCCH signaling DCI for scheduling the transport channel, and according to the received scheduling, the transport channel.
  • PDCCH signaling DCI receives its indicated bearer service data PDSCH.
  • the UE when the transmission channel is configured with a scheduling period, the UE receives a PDCCH at a specified location in a scheduling period of a transmission channel in the MTP to detect scheduling the transmission channel PDCCH signaling DCI.
  • the data block is a transport block (TB), or a payload data unit (PDU) of a Radio Link Control (RLC), or a media access control protocol (MAC, Media). Access Control Data Unit (PDU).
  • TB transport block
  • PDU payload data unit
  • RLC Radio Link Control
  • MAC media access control protocol
  • PDU Access Control Data Unit
  • the transport channel may include at least: SC-MTCH, DTCH (Dedicated Traffic Channel), DCCH (Dedicated Control Channel), CTCH (Common Traffic Channel), MTCH (Multicast Traffic Channel) , multicast traffic channel), MCCH (Multicast Control Channel).
  • the access network element includes at least an enhanced base station (eNB) defined by the 3GPP protocol.
  • eNB enhanced base station
  • the SC-MTCH channel is scheduled by using a dynamic scheduling mechanism.
  • each transmission block (TB) may be scheduled multiple times on the radio interface.
  • Some UEs only need to receive part of the scheduled signaling to decode the TB. For these UEs, it is helpful to determine which schedules are used for the same TB to save battery consumption. After receiving a successful TB, the UE can ignore the follow-up. The scheduling of the TB.
  • the access network element eNB schedules the TB of the SC-MTCH
  • the following exemplary manner may be adopted.
  • the multiple scheduling of one TB is only After scheduling in an MTP, after the UE receives a successful TB in an MTP, the scheduling of the TB in the MTP can be ignored.
  • the eNB configures and indicates that one scheduling of only one TB is scheduled in one MTP, and indicates that the number of MTPs of one TB is continuously scheduled, and the UE can know which number of MTPs are calculated by calculating the number of MTPs.
  • the TBs scheduled by the MTP are the same TB.
  • the PDSCH of the transport channel scheduled by the PDCCH signaling DCI of the MTP transmission is not necessarily transmitted within the range of the MTP. That is, the PDSCH may not be in the range of the MTP, but this does not affect the implementation of the method and the effect of the implementation.
  • FIG. 17 is a flowchart of a method for transmitting a service according to an embodiment of the present application. As shown in FIG. 17, the method for transmitting a multicast service provided by this embodiment includes:
  • the access network element indicates, by using dynamic scheduling signaling, scheduling information of one or more transmissions of a specific service data packet;
  • S1702 The UE receives the specific service data packet according to the dynamic scheduling signaling.
  • the scheduling of the one or more transmissions may include: transmitting the same specific service data packet one or more times in the wireless interface.
  • the scheduling of the one or more transmissions may include: repeatedly transmitting the physical channel data carrying the specific service data packet on the wireless interface.
  • the scheduling information indicated in the dynamic scheduling signaling may include one of the following contents:
  • Starting position information of one or more transmissions the starting position information being a combination of a system superframe number H-SFN and a system frame number SFN number;
  • the number of times of transmission and the time interval between each transmission the time interval being a start position or an end position of two transmissions before and after.
  • the scheduling information may further include frequency domain resource information used for each transmission; the frequency domain resource information may include at least one of the following information: a frequency of a carrier used for the transmission, an indication of whether to perform frequency hopping transmission, The information of the physical resource block (PRB) used for the transmission.
  • PRB physical resource block
  • the scheduling information may further include information on the number of times that the physical channel data carrying the specific service data packet is repeatedly transmitted on the wireless interface in one or more transmissions.
  • the start or end position may be the location of the first or last radio frame or radio subframe used by the transmission.
  • the UE starts receiving the specific industry separately at a starting position of the one or more transmissions One or more transfers of data packets.
  • the access network element indicates scheduling information of one or more transmissions of a specific data block through dynamic scheduling signaling.
  • the receiving end UE receives one or more transmissions of the specific data according to the dynamic scheduling signaling.
  • the one or more transmissions of the specific data block means that the same specific data block is transmitted one or more times in the wireless interface.
  • a primary transmission includes multiple repetitions of physical channel data carrying the particular data block at the wireless interface.
  • the scheduling information indicated in the dynamic scheduling signaling may include one of the following contents:
  • the starting location information of the one or more transmissions where the starting location information is a combination of an H-SFN and an SFN number, or a relative time interval relative to a start or end time of the dynamic scheduling signaling. , or the time interval between the start position of the next transmission and the previous transmission start position;
  • the scheduling information indicated by the dynamic scheduling signaling may further include frequency domain resource information used for each transmission, where the frequency domain resource information may include a combination of one or more of the following information: the transmission The frequency of the carrier used, an indication of whether to perform frequency hopping transmission, and information of a physical resource block (PRB) used for the transmission.
  • the frequency domain resource information may include a combination of one or more of the following information: the transmission The frequency of the carrier used, an indication of whether to perform frequency hopping transmission, and information of a physical resource block (PRB) used for the transmission.
  • PRB physical resource block
  • the scheduling information indicated by the dynamic scheduling signaling may further include information of the number of times that the physical channel data carrying the specific data block is repeatedly transmitted on the wireless interface in the one or more transmissions.
  • the above starting or ending position may be the location of the first or last radio frame or radio subframe used for the transmission.
  • Receiving, by the receiving end UE, one or more transmissions of the specific data block according to the dynamic scheduling signaling may include: the receiving end UE starts receiving the one time at a starting position of the one or more transmissions Or multiple transmissions.
  • the data block may be a transmission block (TB), or a wireless link A load data unit (PDU) of a Control Protocol (RLC), or a Load Data Unit (PDU) of a Medium Access Control Protocol (MAC).
  • TB transmission block
  • PDU load data unit
  • RLC Control Protocol
  • PDU Load Data Unit
  • MAC Medium Access Control Protocol
  • the transport channel may include at least: SC-MTCH, DTCH, DCCH, CTCH, MTCH, MCCH.
  • the access network element may include at least an enhanced base station eNB defined by the 3GPP protocol.
  • the dynamic scheduling signaling may include at least a signaling DCI carried by the PDCCH.
  • the SC-MTCH adopts a dynamic scheduling mechanism for scheduling transmission.
  • each TB may be transmitted multiple times on the radio interface, and some signal coverage is performed.
  • a good UE only needs to receive part of the transmitted signaling to decode the TB.
  • a transmission method can be provided to prevent it from continuing to receive the TB after successfully receiving a TB, thereby saving battery consumption.
  • the one-time dynamic scheduling signaling indicates the resource information of multiple transmissions of one data block
  • the resources for transmitting dynamic scheduling signaling are saved, and on the other hand, the UE can clearly know the data block. Multiple transmissions, so that the UE can combine the signals transmitted multiple times of one data block to improve its receiving reliability. Moreover, after successfully receiving the data block, the UE can ignore the subsequent transmission of the data block, thereby saving battery consumption. .
  • the PDCCH signaling DCI carrying the dynamic scheduling signaling or the PDSCH carrying the data needs to be repeatedly transmitted to meet the UE under the deep coverage condition.
  • the UE In a scheduling mode, in order to receive a service data block, the UE needs to receive multiple repetitions of the PDCCH that schedules the service data block, that is, the UE continuously receives the PDCCH in multiple wireless subframes. This scheduling method is not conducive to the power saving of the UE.
  • the embodiment provides an optimized scheduling method for saving the overhead of transmitting the PDCCH signaling DCI in the scenario where it is determined that one or more transmissions of one or more data blocks need to be scheduled, and receiving UE receiving The power consumption of the PDCCH signaling DCI.
  • the access network element indicates, by means of signaling, information of multiple transmission resources in one scheduling for one or more transmissions of one or more data blocks.
  • the access network element transmits one or more transmissions of the one or more data blocks in the transmission resource indicated by the scheduling information.
  • the UE receives one or more transmissions of the one or more data blocks according to the scheduling information.
  • the information of the multiple transmission resources indicated by the access network by the access network may include:
  • the number information (number) of the plurality of transmission resources is the number information (number) of the plurality of transmission resources
  • the number information and the interval information of the multiple transmission resources are respectively indicated by dynamic scheduling signaling PDCCH DCI, or semi-static signaling, such as system messages, RRC messages, or common control messages of the transmitted services.
  • the above-mentioned number information and the indication method of the interval information are selected.
  • One of the exemplary indication methods is that the access network element indicates the number of pieces of the plurality of transmission resources by semi-static signaling, and the interval information of the plurality of transmission resources is indicated by the dynamic scheduling signaling PDCCH DCI.
  • the second indication method is that the access network element indicates the interval information of the multiple transmission resources by using dynamic signaling, and indicates the number information of the multiple transmission resources by semi-static signaling.
  • the third method of the indication method is that the access network indicates the number information and the interval information of the plurality of transmission resources by dynamic signaling.
  • the fourth method of the indication method is that the access network element indicates the number information and the interval information of the plurality of transmission resources by semi-static signaling.
  • the scheduling information of the multiple transmission resources may further include: a starting location of the first one of the plurality of transmission resources, where the starting location is a combination of H-SFN and SFN numbers, or a size of a relative time interval between a transmission start time or a transmission end time of the dynamic scheduling signaling;
  • the starting location may be indicated by semi-static signaling or dynamic scheduling signaling.
  • the primary transmission of the data block includes the physical channel data carrying the specific data block, and the radio interface performs one or more repetitions, that is, repeatedly transmitting the bearer in multiple wireless subframes of the wireless interface.
  • the physical channel of the data block for example at NB-IoT or eMTC, A PDSCH carrying a transmission block continuously occupies a plurality of available wireless subframes on the radio interface, and repeatedly transmits a PDSCH carrying the transport block in the subframes.
  • the transmission resource refers to a radio subframe resource used for transmitting one transmission of a data block.
  • one transmission resource includes a plurality of continuously available wireless subframes. , that is, the number of times data is repeatedly sent in one transmission.
  • the number of radio subframes included in one transmission resource may be indicated by dynamic scheduling signaling or semi-static signaling.
  • the interval information of the multiple transmission resources refers to an interval between two adjacent transmission resources of the multiple transmission resources, including an interval between first radio subframes of two adjacent transmission resources, or The interval between the last wireless subframe of two adjacent transmission resources, or the interval between the last wireless subframe of the previous transmission resource and the first wireless subframe of the latter transmission resource.
  • the interval is expressed in units of time seconds or milliseconds, or in the number of wireless subframes, radio frames, and wireless superframes (H-SFN).
  • the number information of the plurality of transmission resources refers to the number of transmission resources included in the plurality of transmission resources.
  • the one or more transmissions of the plurality of transmission resources for one or more data blocks include, but are not limited to:
  • the plurality of transmission resources are used for multiple transmissions of one data block
  • the plurality of transmission resources are used for one or more transmissions of a plurality of different data blocks.
  • the scheduling method provided by this embodiment may be periodically applied to the scheduling of service data or a common control channel.
  • the method of this embodiment is applied in a repetition period of each SC-MCCH, that is, in each SC-MCCH repetition period, the access network element indicates one or more by signaling.
  • the data block may be a transport block (TB), or a payload data unit (PDU) of a Radio Link Control Protocol (RLC), or a load data unit of a Medium Access Control Protocol (MAC). (PDU).
  • TB transport block
  • PDU payload data unit
  • RLC Radio Link Control Protocol
  • MAC Medium Access Control Protocol
  • the transport channel may include at least: SC-MTCH, DTCH, DCCH, CTCH, MTCH, MCCH.
  • the access network element may include at least an enhanced base station eNB defined by the 3GPP protocol.
  • the dynamic scheduling signaling may include at least a signaling DCI carried by the PDCCH.
  • FIG. 18 shows an embodiment of the present embodiment, where the number of multiple transmission resources scheduled to be scheduled, the interval of transmission resources, and the wireless content included in each transmission resource are indicated in dynamic scheduling signaling or semi-static signaling.
  • the number of subframes (the number of times the data block is repeatedly transmitted in one transmission) and the starting position of the first transmission resource.
  • FIG. 19 is a schematic structural diagram of a transmission apparatus of a multicast service according to an embodiment of the present application.
  • the transmission device of the multicast service in this embodiment is applicable to the access network element.
  • the transmission device of the multicast service in this embodiment includes:
  • the first scheduling unit 1901 is configured to schedule, on the radio interface, the transmission of the MBMS service data packet carried by the SC-MTCH for N times; wherein N is an integer greater than or equal to 2.
  • the first indication unit 1902 is configured to, when the first scheduling unit 1901 schedules transmission of the MBMS service data packet, indicate to the receiver that the scheduling information of the MBMS service data packet is scheduled.
  • the repeated scheduling information may be indicated by scheduling PDCCH signaling of the MBMS service data packet.
  • the repeated scheduling information may include at least one of the following information:
  • the sequence number of the current scheduling whether the current scheduling is the first scheduling of the MBMS service data packet, the remaining scheduling times of the MBMS service data packet, and the number of the MBMS service data packet.
  • the transmission device of the multicast service of this embodiment may further include:
  • the numbering unit (not shown in FIG. 19) is configured to number the MBMS service data packets so that the number of the MBMS service data packets is cyclically used within the value range.
  • the transmission device of the multicast service of this embodiment may further include:
  • the notifying unit (not shown in FIG. 19) is configured to notify the receiving party of the number N of times of scheduling the MBMS service data packet by using a system message or an SC-MCCH message.
  • the primary scheduling may include repeated transmission of the M1 secondary PDCCH and the repeated transmission of the M2 secondary PDSCH for the MBMS service data packet; wherein, both M1 and M2 are less than or equal to N.
  • the first scheduling unit 1901 may be further configured to continuously schedule N times of MBMS service data packets for one MBMS service data packet.
  • the implementation function of the unit in the transmission apparatus of the multicast service shown in FIG. 19 can be understood by referring to the related description of the foregoing transmission method of the multicast service.
  • the function of the unit in the transmission apparatus of the multicast service shown in FIG. 19 can be realized by a program running on the processor, or can be realized by a logic circuit.
  • FIG. 20 is a schematic structural diagram of another transmission apparatus of a multicast service according to an embodiment of the present application.
  • the transmission device of the multicast service in this embodiment is applicable to the access network element.
  • the transmission device of the multicast service in this embodiment includes:
  • a setting unit 2001 configured to specify or appoint a feedback channel resource for feedback information of a downlink scheduling transmission of the MBMS service data packet;
  • the first receiving unit 2002 is configured to trigger the retransmission unit 2003 after receiving the feedback information of the downlink scheduling transmission of the MBMS service data packet on the feedback channel resource;
  • the retransmission unit 2003 is configured to resend the MBMS service data packet.
  • the feedback information may be feedback of a scheduled transmission of the MBMS service data packet.
  • the feedback channel resource may include at least one of the following resources:
  • Physical random access channel resources physical uplink shared channel (PUSCH) resources, channel resources in a physical uplink control channel (PUCCH), and signals transmitted on the physical uplink shared channel, physical uplink control channel, and physical random access channel Time domain resources.
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • the time domain resource may include at least one of the following resources:
  • the retransmission unit 2003 can also be configured as:
  • M is a preset value
  • the MBMS service data packet is retransmitted.
  • the transmission device of the multicast service in this embodiment may further include:
  • a second indication unit (not shown in FIG. 20) configured to indicate the MBMS service data packet by scheduling PDCCH signaling or other signaling of the MBMS service data packet when scheduling the MBMS service data packet for the first time For the first transmission, or indicate the number of the MBMS service data packet, or indicate the number of the MBMS service data packet and for the first transmission.
  • the second indication unit may be further configured to: when re-scheduling the MBMS service data packet, instructing the MBMS service by scheduling PDCCH signaling or other signaling of the MBMS service data packet.
  • the data packet is retransmitted, or indicates the number of the MBMS service data packet, or indicates the number of the MBMS service data packet and is for retransmission.
  • FIG. 20 shows more The functions of the units in the transmission device of the broadcast service may be implemented by a program running on the processor or by a logic circuit.
  • FIG. 21 is a schematic structural diagram of another transmission apparatus of a multicast service according to an embodiment of the present application.
  • the transmission device of the multicast service in this embodiment is applicable to a user equipment (UE).
  • UE user equipment
  • the transmission device of the multicast service in this embodiment includes:
  • the second receiving unit 2101 is configured to receive control information that the receiving access network element indicates the UE to receive the service receiving status through the system information block or the SC-MCCH.
  • the sending unit 2102 is configured to feed back, according to the control information of the feedback service receiving state, the status of the UE receiving the service.
  • control information of the feedback service receiving state may be used to indicate whether the transmission device of the multicast service feeds back whether the MBMS service data packet is successfully received.
  • control information may include: identifier information of a service that needs to be fed back to the receiving state, or the control information may include: identifier information of a service that needs to be fed back to the receiving state, and at least one of the following information: The transmission device of the multicast service feeds back the uplink resource information and the feedback probability factor used.
  • the uplink resource information may include:
  • a preamble in a physical random access channel PRACH
  • time domain information in which the preamble is transmitted and the number of times the preamble is transmitted
  • PUCCH physical uplink control channel
  • the time domain information may include at least one of the following information: an absolute time, a time indicated in the control information of the feedback service receiving state, and a control information related to the feedback service receiving state.
  • the unit in the transmission device of the multicast service shown in FIG. 21 The implementation function can be understood by referring to the related description of the transmission method of the aforementioned multicast service.
  • the function of the unit in the transmission device of the multicast service shown in FIG. 21 can be realized by a program running on the processor, or can be realized by a logic circuit.
  • FIG. 22 is a schematic structural diagram of a structure of a service transmission apparatus according to an embodiment of the present application. As shown in FIG. 22, the embodiment of the present application further describes a service transmission device, where the device includes:
  • the configuration unit 2201 is configured to configure a transmission channel with a multiple transmission period (MTP);
  • the second scheduling unit 2202 is configured to schedule one or more specific service data packets in the MTP.
  • the MTP configured for the transport channel may include a combination of one or more of the following:
  • the number of times the specific service data packet is repeatedly transmitted in the MTP is repeatedly transmitted in the MTP.
  • the transmission device of the service of this embodiment can be understood by referring to the related embodiment of the transmission method of the foregoing service.
  • the embodiment of the present application further describes a service transmission device, including:
  • a third indication unit configured to indicate, by using dynamic scheduling signaling, scheduling information of one or more transmissions of the specific service data packet, so that the UE receives the specific service data packet according to the dynamic scheduling signaling.
  • the scheduling of the one or more transmissions may include:
  • the same specific service packet is sent one or more times in the wireless interface.
  • the transmission device of the service of this embodiment can be understood by referring to the related embodiment of the transmission method of the foregoing service.
  • the embodiment of the present application further describes a transmission device for a multicast service, including:
  • Determining a unit configured to indicate by signaling, or agree with the UE, by using a protocol, the feedback condition of the UE to the received service or the service received by the UE, so that the UE sends the network element to the access network according to the feedback condition. Send feedback.
  • the feedback condition may include at least one of the following: feedback threshold condition information, feedback restriction bar Information.
  • the transmission apparatus of the multicast service of this embodiment can be understood by referring to the related embodiments of the foregoing transmission method of the multicast service.
  • the embodiment of the present application further describes a transmission device for a multicast service, including:
  • a fourth indication unit configured to indicate, by signaling, a scheduling parameter of the MBMS service data packet, where the scheduling parameter includes at least one of: a repetition factor, an coverage level information, and a reception used when scheduling the MBMS service data packet Success rate threshold and reception failure rate threshold.
  • the fourth indication unit may be configured to indicate the scheduling parameter by an SC-MCCH message, or a System Information Block (SIB), or a PDCCH DCI that schedules an MBMS Service Data Packet.
  • SIB System Information Block
  • PDCCH DCI that schedules an MBMS Service Data Packet.
  • the transmission apparatus of the multicast service of this embodiment can be understood by referring to the related embodiments of the foregoing transmission method of the multicast service.
  • the embodiment of the present application further describes a transmission device for a multicast service, where the device includes:
  • the third receiving unit is configured to receive one or more scheduling of the service data packet in one or more MTPs of the scheduled service data packet.
  • the judging unit is configured to determine the service data scheduled in different MTPs according to the boundary of the MTP when the multiple scheduling of one service data packet is in the same MTP, and one MTP only schedules the same service data packet one or more times.
  • Packages are different business data packages.
  • the transmission apparatus of the multicast service of this embodiment can be understood by referring to the related embodiments of the foregoing transmission method of the service.
  • the embodiment of the present application further describes a transmission device for a multicast service, where the device includes:
  • the transmission unit is configured to, by means of signaling, information indicating a plurality of transmission resources for one or more transmissions of one or more data blocks in one scheduling.
  • the transmission unit may be further configured to transmit one or more of the one or more data blocks in a transmission resource indicated by the scheduling information.
  • the information about the multiple transmission resources may include: the number information of the multiple transmission resources, and the interval information of the multiple transmission resources.
  • the number information and the interval information of the multiple transmission resources may be indicated by dynamic scheduling signaling PDCCH DCI or semi-static signaling, respectively.
  • the number information and the interval information of the multiple transmission resources are respectively indicated by dynamic scheduling signaling PDCCH DCI, or semi-static signaling, and may include one of the following:
  • the network element of the access network indicates the number information of the multiple transmission resources by semi-static signaling, and the interval information of the multiple transmission resources is indicated by the dynamic scheduling signaling PDCCH DCI;
  • the network element of the access network indicates the interval information of the multiple transmission resources by using dynamic signaling, and indicates the number information of the multiple transmission resources by semi-static signaling;
  • the network element of the access network indicates the number information and the interval information of the multiple transmission resources by using dynamic signaling
  • the access network element indicates the number information and the interval information of the multiple transmission resources by semi-static signaling.
  • the information about the multiple transmission resources may further include: a starting location of the first transmission resource of the multiple transmission resources, where the starting location is a system superframe number H-SFN and a system frame number a combination of SFN numbers, or a relative time interval relative to a transmission start time or a transmission end time of the dynamic scheduling signaling;
  • the starting location may be indicated by semi-static signaling or dynamic scheduling signaling.
  • the scheduling of the one-time transmission may include: performing physical channel data carrying the specific service data packet on the wireless interface for one or more repeated transmissions.
  • the transmission resource refers to a radio subframe resource used for transmitting one transmission of a data block
  • the interval information of the multiple transmission resources refers to an interval between two adjacent transmission resources of the multiple transmission resources, including an interval between first radio subframes of two adjacent transmission resources, or The interval between the last wireless subframe of two adjacent transmission resources, or the interval between the last wireless subframe of the previous transmission resource and the first wireless subframe of the latter transmission resource.
  • the MBMS service data packet includes: a Medium Access Control Protocol Data Unit (MAC PDU) carrying MBMS service data, or a Protocol Data Unit (RLC PDU) of a Radio Link Control Protocol.
  • MAC PDU Medium Access Control Protocol Data Unit
  • RLC PDU Protocol Data Unit
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed.
  • the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms. of.
  • the units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • the functional units in the embodiments of the present application may all be integrated into one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit;
  • the unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the embodiment of the present application further provides a computer readable medium storing a transmission program of a multicast service, where the transmission program is executed by a processor to implement the steps of the transmission method of the multicast service in any of the foregoing embodiments.
  • Such software may be distributed on a machine-readable medium, such as a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transitory media).
  • a machine-readable medium such as a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transitory media).
  • computer storage medium includes the volatility embodied in any method or technique for storing information, such as computer readable instructions, data structures, program modules, or other data. And non-volatile, removable and non-removable media.
  • Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer.
  • communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media. .
  • the embodiment of the present invention provides a method and a device for transmitting a multicast service, which improves the reliability of sending and receiving service data carried by the SC-MTCH, and provides the UE with multiple opportunities for receiving, and avoids data reception due to short-term interference.
  • the failure, and by repeating the scheduling information enables a UE that successfully receives a certain data packet to skip (not receive) subsequent repeated scheduling of the data packet, thereby saving power consumption of the UE.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de transmission pour un service de multidiffusion. Le procédé comprend l'étape suivante : un élément de réseau d'un réseau d'accès programme, à une interface sans fil, la transmission d'un paquet de données de service de diffusion/multidiffusion multimédia (MBMS) transporté N fois par un canal unique de trafic de multidiffusion cellulaire (SC-MTCH), N étant un nombre entier supérieur ou égal à 2.
PCT/CN2017/095815 2016-08-12 2017-08-03 Procédé et dispositif de transmission pour service de multidiffusion WO2018028497A1 (fr)

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EP4024911A4 (fr) * 2019-09-23 2022-11-23 Huawei Technologies Co., Ltd. Procédé de commande de transmission de multidiffusion et dispositif associé
WO2021056192A1 (fr) * 2019-09-24 2021-04-01 Nokia Shanghai Bell Co., Ltd. Reprogrammation de ressource pour transmission
WO2021057829A1 (fr) * 2019-09-24 2021-04-01 华为技术有限公司 Procédé, appareil et dispositif de détermination de ressources de domaine temporel et support de stockage
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CN115038117A (zh) * 2020-01-16 2022-09-09 Oppo广东移动通信有限公司 数据传输方法及相关设备
CN115038117B (zh) * 2020-01-16 2023-09-26 Oppo广东移动通信有限公司 数据传输方法及相关设备
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CN113453165A (zh) * 2020-03-27 2021-09-28 成都鼎桥通信技术有限公司 在nr小区中sc-mcch调度信息的发送方法及设备
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CN113453163A (zh) * 2020-03-27 2021-09-28 成都鼎桥通信技术有限公司 在nr小区中sc-ptm配置信息的发送方法及设备
CN113692048B (zh) * 2020-05-18 2023-11-10 大唐移动通信设备有限公司 一种配置和确定pucch资源的方法及装置
CN113692048A (zh) * 2020-05-18 2021-11-23 大唐移动通信设备有限公司 一种配置和确定pucch资源的方法及装置
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CN115668993A (zh) * 2020-07-07 2023-01-31 Oppo广东移动通信有限公司 接收本地mbs业务的方法及装置、终端设备、网络设备
CN113950004B (zh) * 2020-07-17 2022-10-04 成都鼎桥通信技术有限公司 多媒体广播多播业务的传输方法和系统
CN113950004A (zh) * 2020-07-17 2022-01-18 成都鼎桥通信技术有限公司 多媒体广播多播业务的传输方法和系统
CN113972965B (zh) * 2020-07-24 2023-08-22 维沃移动通信有限公司 业务的处理方法、装置及相关设备
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