WO2022083368A1 - 分组数据汇聚协议状态上报、接收方法、终端及设备 - Google Patents

分组数据汇聚协议状态上报、接收方法、终端及设备 Download PDF

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Publication number
WO2022083368A1
WO2022083368A1 PCT/CN2021/118769 CN2021118769W WO2022083368A1 WO 2022083368 A1 WO2022083368 A1 WO 2022083368A1 CN 2021118769 W CN2021118769 W CN 2021118769W WO 2022083368 A1 WO2022083368 A1 WO 2022083368A1
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Prior art keywords
pdcp
terminal
status report
packet data
multicast
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PCT/CN2021/118769
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English (en)
French (fr)
Inventor
谌丽
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大唐移动通信设备有限公司
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Application filed by 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Priority to EP21881787.2A priority Critical patent/EP4236386A4/en
Priority to US18/033,051 priority patent/US20230389129A1/en
Publication of WO2022083368A1 publication Critical patent/WO2022083368A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1685—Details of the supervisory signal the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1863—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast comprising mechanisms for improved reliability, e.g. status reports
    • H04L12/1868—Measures taken after transmission, e.g. acknowledgments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols

Definitions

  • the present disclosure relates to the field of communication technologies, and in particular, to a packet data convergence protocol status reporting and receiving method, terminal and device.
  • MBMS multimedia broadcast multicast service, multicast broadcast multimedia service
  • 5G technology introduces MBMS services, which are called MBS (Multicast and Broadcast Services) in 5G.
  • MBS Multicast and Broadcast Services
  • 5G MBS services are sent independently in each cell.
  • the services that need to perform broadcast and multicast transmission are mapped to the broadcast and multicast channel for transmission to multiple terminals, which can be called point-to-multipoint transmission (PTM, Point to Multiple).
  • PTM Point to Multiple
  • a terminal can configure both PTM and PTP (Point to Point) transmission, as shown in Figure 1.
  • the basis of the unicast retransmission mechanism is that the transmission channel and the feedback channel are in one-to-one correspondence between the base station and the terminal. For different terminals, there are independent transmission channels and feedback channels.
  • PTM is a point-to-multipoint transmission, and multiple terminals receive the same PDCP PDU, and the related art cannot guarantee that each terminal successfully receives the PDCP PDU. Meanwhile, for multicast transmission, the related art is aimed at point-to-multipoint channels, and no feedback channel is available.
  • the embodiments of the present disclosure provide a packet data convergence protocol status reporting and receiving method, terminal and device.
  • the MBS service transmitted by the PTM can be reliably transmitted at the PDCP layer.
  • a method for reporting the status of a packet data convergence protocol, which is applied to a terminal receiving MBS transmission of a multicast broadcast service comprising:
  • the PDCP status report is sent on the predetermined upstream channel.
  • the preset conditions include at least one of the following:
  • the terminal side counts the number of lost packets of the packet data convergence protocol packet data unit PDCP PDU, and determines when the number of lost packets of the PDCP PDU reaches a preset threshold;
  • the terminal side receives the PDCP status report polling sent by the network side;
  • the terminal receives an MBS service bearer reconfiguration message, where the reconfiguration message carries a data recovery indication, and the reconfiguration message includes reconfiguration from multicast PTM transmission to unicast PTP transmission, or MRB reconfiguration for multicast PTM transmission.
  • the PDCP status report polling sent by the terminal side to receive the network side includes one of the following:
  • the PDCP status report polling sent to the terminal on the unicast downlink channel includes:
  • the predetermined uplink channel includes at least one of the following:
  • the downlink bearer of multicast PTM transmission is configured as RLC UM in RLC unacknowledged mode.
  • RLC UM for this MBS service, when multicast PTM and unicast PTP transmission modes are configured for the terminal at the same time, the uplink RLC UM channel of PTP transmission mode is used.
  • the PDCP status report includes: the sequence number of the unsuccessfully received PDCP PDU.
  • the method for reporting the status of the packet data aggregation protocol further includes:
  • Embodiments of the present disclosure further provide a method for receiving a packet data convergence protocol status, which is applied to the network side, and the method includes:
  • the receiving terminal When receiving the multicast broadcast service MBS, the receiving terminal reports the PDCP status report of the Packet Data Convergence Protocol according to preset conditions; the PDCP status report is sent on a predetermined uplink channel;
  • the preset conditions include at least one of the following:
  • the terminal side counts the number of lost packets of the packet data convergence protocol packet data unit PDCP PDU, and determines when the number of lost packets of the PDCP PDU reaches a preset threshold;
  • the network side sends PDCP status report polling
  • the network side configures the MBS service bearer reconfiguration message, the reconfiguration message carries a data recovery indication, and the reconfiguration message includes reconfiguration from multicast PTM transmission to unicast PTP transmission, or MRB reconfiguration for multicast PTM transmission.
  • the PDCP status report poll sent by the network side includes one of the following:
  • the network side sends PDCP PDUs on the multicast downlink channel, and the PDCP PDUs include polling bits;
  • the network side sends PDCP status report polling to the terminal on the unicast downlink channel, and the PDCP PDU includes polling bits.
  • sending the PDCP status report poll to the terminal on the unicast downlink channel includes:
  • the predetermined uplink channel includes at least one of the following:
  • the downlink bearer of multicast PTM transmission is configured as RLC UM in RLC unacknowledged mode.
  • RLC UM for this MBS service, when multicast PTM and unicast PTP transmission modes are configured for the terminal at the same time, the uplink RLC UM channel of PTP transmission mode is used.
  • the PDCP status report includes: the sequence number of the PDCP PDU that the terminal fails to receive.
  • sending the packet data convergence protocol packet data unit PDCP PDU retransmission to the terminal includes: sending the PDCP PDU retransmission through the multicast PTM transmission channel of the MRB; or,
  • the PDCP PDU is retransmitted by sending the PDCP PDU on the unicast PTP transmission channel of the MRB.
  • a terminal includes: a transceiver, a processor, and a memory, where a program executable by the processor is stored in the memory; when the processor executes the program, it realizes: receiving a multicast broadcast
  • the processor executes the program, it realizes: receiving a multicast broadcast
  • the PDCP status report of the packet data convergence protocol is triggered; the PDCP status report is sent on the predetermined uplink channel.
  • the preset conditions include at least one of the following:
  • the terminal side counts the number of lost packets of the packet data convergence protocol packet data unit PDCP PDU, and determines when the number of lost packets of the PDCP PDU reaches a preset threshold;
  • the network side sends PDCP status report polling
  • the terminal receives an MBS service bearer reconfiguration message, where the reconfiguration message carries a data recovery indication, and the reconfiguration message includes reconfiguration from multicast PTM transmission to unicast PTP transmission, or MRB reconfiguration for multicast PTM transmission.
  • Embodiments of the present disclosure also provide an apparatus for reporting the status of a packet data convergence protocol, which is applied to a terminal, and the apparatus includes:
  • a processing module configured to trigger a PDCP status report according to a preset condition when receiving the multicast broadcast service MBS;
  • the transceiver module is used for sending the PDCP status report on the predetermined uplink channel.
  • Embodiments of the present disclosure further provide a network device, including: a transceiver, a processor, and a memory, where a program executable by the processor is stored in the memory; when the processor executes the program, the processor implements: a receiving terminal When receiving the multicast broadcast service MBS, according to preset conditions, report the PDCP status report of the Packet Data Convergence Protocol; the PDCP status report is sent on the predetermined uplink channel; Send the Packet Data Convergence Protocol Packet Data Unit PDCP PDU to the terminal Retransmission.
  • a network device including: a transceiver, a processor, and a memory, where a program executable by the processor is stored in the memory; when the processor executes the program, the processor implements: a receiving terminal When receiving the multicast broadcast service MBS, according to preset conditions, report the PDCP status report of the Packet Data Convergence Protocol; the PDCP status report is sent on the predetermined uplink channel; Send the Pack
  • the preset conditions include at least one of the following:
  • the terminal side counts the number of lost packets of the packet data convergence protocol packet data unit PDCP PDU, and determines when the number of lost packets of the PDCP PDU reaches a preset threshold;
  • the network side sends PDCP status report polling
  • the network side configures the MBS service bearer reconfiguration message, the reconfiguration message carries a data recovery indication, and the reconfiguration message includes reconfiguration from multicast PTM transmission to unicast PTP transmission, or MRB reconfiguration for multicast PTM transmission.
  • Embodiments of the present disclosure also provide an apparatus for receiving a packet data convergence protocol status, which is applied to network equipment, and the apparatus includes:
  • the transceiver module is used for receiving the packet data convergence protocol PDCP status report reported by the terminal according to preset conditions when receiving the multicast broadcast service MBS; the PDCP status report is sent on a predetermined uplink channel; sending packet data to the terminal Convergence Protocol Packet Data Unit PDCP PDU retransmission.
  • Embodiments of the present disclosure also provide a processor-readable storage medium storing processor-executable instructions for causing the processor to execute the above-mentioned Methods.
  • the terminal triggers the PDCP status report of the Packet Data Convergence Protocol according to preset conditions when receiving the multicast broadcast service MBS; and sends the PDCP status report on the predetermined uplink channel. Therefore, the MBS service transmitted by the PTM can be reliably transmitted at the PDCP layer.
  • FIG. 1 is a schematic diagram of MBS service transmission
  • Figure 2 is a schematic diagram of the first protocol stack architecture in which the base station supports both PTM and PTP;
  • 3 is a schematic diagram of the second protocol stack architecture in which the base station supports both PTM and PTP;
  • FIG. 4 is a schematic flowchart of a method for reporting the status of a packet data convergence protocol on the terminal side of the present disclosure
  • FIG. 5 is a schematic diagram of a terminal sending a PDCP status report through an uplink RLC AM channel according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of an RLC channel in which the RLC layer of multicast PTM transmission is configured as an RLC AM according to an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of a terminal transmitting a PDCP status report through an uplink RLC UM entity paired with a downlink RLC UM according to an embodiment of the present disclosure
  • FIG. 8 is a schematic diagram of an RLC channel in which the RLC layer of multicast PTM transmission is configured as an RLC UM according to an embodiment of the present disclosure
  • FIG. 9 is a schematic diagram of a terminal sending a PDCP status report through an uplink RLC UM channel of a PTP transmission mode according to an embodiment of the present disclosure
  • FIG. 10 is a schematic diagram of sending a PDCP status report for multicast PTM transmission using an RLC channel of unicast PTP according to an embodiment of the present disclosure
  • FIG. 11 is a schematic flowchart of a method for receiving a packet data convergence protocol status on a network side according to an embodiment of the present disclosure
  • FIG. 12 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic block diagram of a device on a terminal side according to an embodiment of the present disclosure.
  • the base station supports two protocol stack architectures of PTM and PTP at the same time.
  • multicast and unicast are mapped to different radio bearers, and are transmitted through different PDCP (Packet Convergence Protocol) entities and different RLC entities.
  • PDCP Packet Convergence Protocol
  • the MBS service is mapped to a radio bearer MRB, through a PDCP entity, and unicast and multicast are transmitted through different RLC (Radio Link Control) entities and their corresponding logical channels.
  • RLC Radio Link Control
  • PTP unicast
  • PTM multicast
  • an embodiment of the present disclosure provides a method for reporting the status of a packet data convergence protocol, which is applied to a terminal receiving MBS transmission of a multicast broadcast service.
  • the method includes:
  • Step 41 when receiving the multicast broadcast service MBS, according to a preset condition, trigger the PDCP status report of the Packet Data Convergence Protocol;
  • Step 42 Send a PDCP status report on a predetermined uplink channel.
  • the PDCP status report of the packet data convergence protocol is triggered according to preset conditions when receiving the multicast broadcast service MBS; the PDCP status report is sent on a predetermined uplink channel. That is, the terminal receiving the MBS multicast transmission triggers the PDCP status report according to the determined conditions, and sends the PDCP status report to the base station on the designated uplink channel, so that the MBS service transmitted by the PTM can be reliably transmitted at the PDCP layer.
  • the preset condition includes at least one of the following:
  • the terminal side counts the number of lost packets of the packet data convergence protocol packet data unit PDCP PDU, and determines when the number of lost packets of the PDCP PDU reaches a preset threshold;
  • the terminal side receives the PDCP status report polling sent by the network side;
  • the terminal receives the MBS service bearer reconfiguration message, the reconfiguration message carries a data recovery indication, and the reconfiguration message includes reconfiguration from multicast PTM transmission to unicast PTP transmission, or reconfiguration of the MRB of multicast PTM transmission. configuration.
  • the terminal side counts the number of correctly received PDCP PDUs, and triggers a PDCP status report when the number of lost PDCP PDUs reaches the threshold.
  • the threshold may be configured by the base station, or specified by a protocol, or determined by the terminal side.
  • the statistical method of the number of lost packets of PDCP PDUs can be calculated by counting the number of gaps in PDCP SNs after the terminal reorders the received PDCP PDUs; Number of PDCP PDUs that were not successfully received.
  • the base station side sends the PDCP status report polling POLL; the terminal side receives the PDCP status report polling sent by the network side.
  • the PDCP status report polling sent by the terminal side to receive the network side includes one of the following:
  • A) Receive the PDCP PDU sent by the network side on the multicast downlink channel, and obtain the polling bit from the PDCP PDU;
  • the PDCP PDU sent by the network side (such as the base station) in the broadcast mode includes polling POLL bits.
  • the base station can configure whether it needs to respond to PDCP polling on the base station side for each terminal, and configure the terminal that needs to respond to the base station polling to send a PDCP status report when it receives POLL, and other terminals do not need to respond, that is There is no need to send PDCP status reports.
  • the PDCP status report polling sent to the terminal on the unicast downlink channel includes:
  • the network side (eg, the base station) sends a poll to the terminal on the unicast downlink channel, that is, the PTP downlink channel.
  • the polling can be further divided into: PDCP status report polling for PTM; PDCP status report polling for PTP; PDCP status report polling for all transmissions of PTM and PTP. All PDCP PDUs transmitted by PTM and PTP are ordered uniformly, and PDCP status reports are sent.
  • the terminal triggers to send a PDCP status report during handover.
  • the terminal triggers the PDCP status report.
  • the network side such as base station
  • the MBS service bearer is reconfigured from PTM transmission to PTP transmission, or when the MBS service transmitted by PTM is reconfigured (including reconfiguring downlink transmission parameters, reconfiguring the Configure the corresponding uplink RLC channel)
  • the terminal triggers the PDCP status report.
  • the predetermined uplink channel includes at least one of the following:
  • the bearer corresponding to PTM is configured as RLC AM
  • the base station configures an uplink RLC AM channel corresponding to the downlink RLC AM channel for each terminal.
  • the terminal sends the PDCP status report through the uplink RLC AM channel.
  • the RLC layer for multicast PTM transmission is configured as the RLC channel of RLC AM.
  • Multiple terminals receive PTM transmission through the shared downlink RLC channel.
  • Each terminal has an RLC AM entity, and the RLC AM entity corresponds to one RLC AM entity.
  • the PTM downlink bearer is configured as an RLC UM
  • the base station configures an uplink RLC UM entity paired with the downlink RLC UM for the terminal that can send the PDCP status report, for transmitting the PDCP status report.
  • the RLC layer of multicast PTM transmission is configured as a schematic diagram of the RLC channel of RLC UM.
  • the base station has two RLC UM entities, one for sending downlink PTM transmission and one for receiving PDCP status report;
  • Each terminal has two RLC UM entities, the RLC channel corresponding to one RLC UM entity is used to receive PTM transmission, and the uplink RLC channel corresponding to the other RLC UM entity is used to report PDCP status reports.
  • the downlink bearer of multicast PTM transmission is configured as RLC UM in RLC unacknowledged mode.
  • RLC UM the uplink RLC UM channel of PTP transmission mode is used.
  • the PTM downlink bearer is configured as RLC UM
  • the base station configures both PTM and PTP transmission modes for the terminal for the MBS service
  • the terminal sends the PDCP status report through the uplink RLC UM channel of the PTP transmission mode.
  • FIG. 10 a schematic diagram of sending a PDCP status report for multicast PTM transmission using the RLC channel of unicast PTP.
  • Entity multiple terminals receive PTM transmissions through a shared downlink RLC channel, each terminal has two RLC UM entities, one RLC UM entity corresponding to the RLC channel is used to receive PTM transmission, another RLC UM entity corresponding to the uplink RLC channel Used to report PDCP status reports.
  • the PDCP status report includes: the sequence number of the unsuccessfully received PDCP PDU.
  • the method for reporting the status of the packet data convergence protocol may further include:
  • Step 43 receiving the PDCP PDU retransmission sent by the network side on the multicast PTM transmission channel of the MRB;
  • Step 44 Receive PDCP PDU retransmission sent by the network side on the unicast PTP transmission channel of the MRB.
  • the base station after receiving the PDCP status report sent by the terminal, the base station adopts the PTM method to send the retransmission of the PDCP PDU through the downlink RLC channel and the physical layer channel of the PTM, and the retransmission of the PDCP PDU may be a direct retransmission.
  • step 44 in the specific implementation, after receiving the PDCP status report sent by the terminal, the base station adopts the PTP mode, provided that the MBS service is mapped to both PTM and PTP transmission, then the PDCP PDU in the PTM transmission mode corresponding to the MBS service is sent After the error, the PDCP PDU is sent through the downlink RLC channel and the physical layer channel of the PTP transmission corresponding to the MBS service to send a retransmission of the PDCP PDU. PDCP SDU, encapsulated into a new PDCP PDU transmission.
  • Embodiment 1 An implementation method in which the terminal triggers the PDCP status report by counting the number of PDCP PDUs received in error:
  • the terminal sends the PDCP status report through the dedicated uplink RLC channel corresponding to the PTM downlink RLC channel configured by the base station.
  • the base station side configures the threshold of the number of erroneous PDCP PDUs that trigger the PDCP status report (this step is optional). If the threshold for the number of erroneous PDCP PDUs is specified by the protocol, or the terminal decides by itself, this step can be omitted.
  • the base station receives the PDCP status report sent by the terminal through the uplink RLC channel corresponding to the PTM downlink RLC channel. The base station retransmits PDCP PDUs that can be retransmitted according to the PDCP PDUs that the terminal has not successfully received in the PDCP status report.
  • the PDCP PDUs that can be retransmitted refer to PDCP PDUs that still exist in the base station's buffer, and/or PDCP discard timers have not expired. PDCP PDUs. Specifically, the retransmission of the PDCP PDU may be sent in a PTM manner or a PTP manner.
  • the terminal side receives the threshold of the number of error PDCP PDUs sent by the base station side to trigger the PDCP status report (this step is optional). If the threshold for the number of erroneous PDCP PDUs is specified by the protocol, or the terminal decides by itself, this step can be omitted.
  • the terminal counts the number of correctly received PDCP PDUs, and triggers a PDCP status report when the number of lost PDCP PDUs reaches the threshold.
  • the statistical method of the number of lost packets of PDCP PDUs can be calculated by counting the number of gaps in PDCP SNs after the terminal reorders the received PDCP PDUs; Number of PDCP PDUs that were not successfully received.
  • the terminal After triggering the PDCP status report, the terminal encapsulates the SN (serial number) of the unsuccessfully received PDCP PDU into the PDCP status report, and then sends the PDCP status report to the base station through the uplink RLC channel corresponding to the PTM downlink RLC channel.
  • the terminal receives the PDCP PDU retransmission sent by the base station side.
  • the PDCP PDU retransmission may be sent in a PTM manner or a PTP manner.
  • Embodiment 2 Another implementation in which the terminal triggers the PDCP status report by counting the number of PDCP PDUs received in error:
  • the terminal sends the PDCP status report through the uplink RLC channel corresponding to the PTP downlink transmission.
  • the base station side configures the threshold of the number of erroneous PDCP PDUs that trigger the PDCP status report (this step is optional). If the threshold for the number of erroneous PDCP PDUs is specified by the protocol, or the terminal decides by itself, this step can be omitted.
  • the base station receives the PDCP status report sent by the terminal through the uplink RLC channel corresponding to the PTP downlink RLC channel. The base station retransmits PDCP PDUs that can be retransmitted according to the PDCP PDUs that the terminal has not successfully received in the PDCP status report.
  • the PDCP PDUs that can be retransmitted refer to PDCP PDUs that still exist in the base station's buffer, and/or PDCP discard timers have not expired. PDCP PDUs. Specifically, the retransmission of the PDCP PDU may be sent in a PTM manner or a PTP manner.
  • the terminal side receives the threshold of the number of error PDCP PDUs sent by the base station side to trigger the PDCP status report (this step is optional). If the threshold for the number of erroneous PDCP PDUs is specified by the protocol, or the terminal decides by itself, this step can be omitted.
  • the terminal counts the number of correctly received PDCP PDUs for an MBS service bearer, and triggers a PDCP status report when the number of lost PDCP PDUs reaches the threshold.
  • the terminal When the terminal counts the number of lost PDCP PDUs, it can only count the number of lost PDCP PDUs received by the MBS service bearer through the PTM, or simultaneously count the number of lost PDCP PDUs received by the MBS service bearer through the PTM and PTP. .
  • the terminal After triggering the PDCP status report, the terminal encapsulates the SN (serial number) of the unsuccessfully received PDCP PDU into the PDCP status report, and then sends the PDCP status report to the base station through the uplink RLC channel corresponding to the PTP downlink RLC channel.
  • the terminal receives the PDCP PDU retransmission sent by the base station side.
  • the PDCP PDU retransmission may be sent in a PTM manner or a PTP manner.
  • Embodiment 3 An implementation manner in which the terminal triggers the PDCP status report through the base station POLL:
  • the terminal sends the PDCP status report through the dedicated uplink RLC channel corresponding to the PTM downlink RLC channel configured by the base station.
  • the base station side configures whether the terminal can send a PDCP status report.
  • the configuration information can be configured in the broadcast or multicast information for configuring the PTM. In this case, all terminals receiving the MBS service need to send a status report; or sent through downlink unicast signaling to the terminal, in this case, Only a terminal that has received the indication that the PDCP status report is allowed to be sent may send the PDCP status report.
  • the base station sends a polling request POLL to notify the above-configured terminal to send a PDCP status report.
  • the POLL may be a one-bit indication contained in the PDCP data PDU.
  • the base station receives the PDCP status report sent by the terminal through the uplink RLC channel corresponding to the PTM downlink RLC channel.
  • the base station retransmits PDCP PDUs that can be retransmitted according to the PDCP PDUs that the terminal has not successfully received in the PDCP status report.
  • the PDCP PDUs that can be retransmitted refer to PDCP PDUs that still exist in the base station's buffer, and/or PDCP discard timers have not expired.
  • the retransmission of the PDCP PDU may be sent in a PTM manner or a PTP manner.
  • the terminal side receives information about whether the terminal configured by the base station can send the PDCP status report. If it is determined that it can be sent, go to the next step.
  • the terminal side receives the polling request POLL sent by the base station.
  • the terminal side triggers the PDCP status report, encapsulates the SN (serial number) of the unsuccessfully received PDCP PDU into the PDCP status report, and then sends the PDCP status report to the base station through the uplink RLC channel corresponding to the PTM downlink RLC channel.
  • the terminal side receives the PDCP PDU retransmission sent by the base station side.
  • the PDCP PDU retransmission may be sent in a PTM manner or a PTP manner.
  • Embodiment 4 Another implementation manner in which the terminal triggers the PDCP status report through the base station POLL:
  • the terminal sends the PDCP status report through the uplink RLC channel corresponding to the PTP downlink transmission.
  • the base station side configures whether the terminal can send a PDCP status report.
  • the configuration information can be configured in the broadcast or multicast information for configuring the PTM. In this case, all terminals receiving the MBS service need to send a status report; or sent through downlink unicast signaling to the terminal, in this case, Only a terminal that has received the indication that the PDCP status report is allowed to be sent may send the PDCP status report.
  • the base station side sends a polling request POLL to notify the above-configured terminal to send a PDCP status report.
  • the POLL may be a one-bit indication contained in the PDCP data PDU.
  • the base station side receives the PDCP status report sent by the terminal through the uplink RLC channel corresponding to the PTP downlink RLC channel.
  • the base station side retransmits the PDCP PDUs that can be retransmitted according to the PDCP PDUs that the terminal has not successfully received in the PDCP status report.
  • the PDCP PDUs that can be retransmitted refer to the PDCP PDUs that still exist in the base station cache, and/or the PDCP discard timer has not expired.
  • PDCP PDU refer to the PDCP PDUs that still exist in the base station cache, and/or the PDCP discard timer has not expired.
  • PDCP PDU Specifically, the retransmission of the PDCP PDU may be sent in a PTM manner or a PTP manner.
  • the terminal side receives information about whether the terminal configured by the base station can send the PDCP status report. If it is determined that it can be sent, go to the next step.
  • the terminal side receives the polling request POLL sent by the base station.
  • the terminal side triggers the PDCP status report, encapsulates the SN (serial number) of the unsuccessfully received PDCP PDU into the PDCP status report, and then sends the PDCP status report to the base station through the uplink RLC channel corresponding to the PTP downlink RLC channel.
  • the terminal side receives the PDCP PDU retransmission sent by the base station side.
  • the PDCP PDU retransmission may be sent in a PTM manner or a PTP manner.
  • Embodiment 5 An implementation manner in which the terminal is configured to trigger the PDCP status report during handover:
  • the terminal sends the PDCP status report through the dedicated uplink RLC channel corresponding to the PTM downlink RLC channel configured by the base station.
  • the base station side configures whether the terminal needs to send a PDCP status report during handover.
  • the configuration information can be configured in the broadcast or multicast information for configuring the PTM. In this case, all terminals receiving the MBS service need to send PDCP status reports during handover; or sent through downlink unicast signaling to the terminals. , in this case, only the terminal that receives the indication needs to send the PDCP status report during handover.
  • the base station side receives the PDCP status report sent by the terminal through the uplink RLC channel corresponding to the PTM downlink RLC channel.
  • the base station side retransmits the PDCP PDUs that can be retransmitted according to the PDCP PDUs that the terminal has not successfully received in the PDCP status report.
  • the PDCP PDUs that can be retransmitted refer to the PDCP PDUs that still exist in the base station cache, and/or the PDCP discard timer has not expired. PDCP PDU. Specifically, the retransmission of the PDCP PDU may be sent in a PTM manner or a PTP manner.
  • the terminal side receives information on whether the terminal configured by the base station needs to send a PDCP status report during handover.
  • the terminal triggers the PDCP status report, encapsulates the SN (serial number) of the unsuccessfully received PDCP PDU into the PDCP status report, and then sends the PDCP status report to the base station through the uplink RLC channel corresponding to the PTM downlink RLC channel. .
  • the PDCP PDU sent by the receiving base station is retransmitted.
  • the PDCP PDU retransmission may be sent in a PTM manner or a PTP manner.
  • Embodiment 6 Another implementation manner in which the terminal is configured to trigger the PDCP status report during handover:
  • the terminal sends the PDCP status report through the uplink RLC channel corresponding to the PTP downlink transmission.
  • the base station side configures whether the terminal needs to send a PDCP status report during handover.
  • the configuration information can be configured in the broadcast or multicast information for configuring the PTM. In this case, all terminals receiving the MBS service need to send PDCP status reports during handover; or sent through downlink unicast signaling to the terminals. , in this case, only the terminal that receives the indication needs to send the PDCP status report during handover.
  • the base station side receives the PDCP status report sent by the terminal through the uplink RLC channel corresponding to the PTP downlink RLC channel.
  • the base station side retransmits the PDCP PDUs that can be retransmitted according to the PDCP PDUs that the terminal has not successfully received in the PDCP status report.
  • the PDCP PDUs that can be retransmitted refer to the PDCP PDUs that still exist in the base station cache, and/or the PDCP discard timer has not expired. PDCP PDU. Specifically, the retransmission of the PDCP PDU may be sent in a PTM manner or a PTP manner.
  • the terminal side receives information on whether the terminal configured by the base station needs to send a PDCP status report during handover.
  • the terminal triggers the PDCP status report, encapsulates the SN (serial number) of the unsuccessfully received PDCP PDU into the PDCP status report, and then sends the PDCP status report to the base station through the uplink RLC channel corresponding to the PTP downlink RLC channel.
  • the terminal side receives the PDCP PDU retransmission sent by the base station side.
  • the PDCP PDU retransmission may be sent in a PTM manner or a PTP manner.
  • Embodiment 7 An implementation of triggering PDCP status report when the bearer of the MBS service is reconfigured:
  • the terminal sends the PDCP status report through the dedicated uplink RLC channel corresponding to the PTM downlink RLC channel configured by the base station.
  • the base station side reconfigures the MBS service bearer RB, including 1) still using PTM transmission, but only reconfiguring some of the parameters; 2) changing the transmission mode of the RB from PTM to PTP; 3) the transmission mode of the RB from PTP is changed to PTM; 4) The transmission mode of the RB is changed from PTM to PTM and PTP at the same time. At the same time when the service bearer is reconfigured, it is indicated that data recovery needs to be performed.
  • the base station side receives the PDCP status report sent by the terminal through the uplink RLC channel corresponding to the original PTM downlink RLC channel, or receives the PDCP status report sent by the terminal through the uplink RLC channel corresponding to the newly configured PTM downlink RLC channel.
  • the base station side retransmits PDCP PDUs that can be retransmitted according to the new configuration of the MBS service bearer according to the PDCP PDUs that the terminal has not successfully received in the PDCP status report.
  • the PDCP PDUs that can be retransmitted refer to PDCP PDUs still stored in the base station cache , and/or PDCP discards PDCP PDUs whose timers have not expired.
  • the retransmission of the PDCP PDU may be sent in a PTM manner or a PTP manner.
  • the terminal side receives the reconfiguration of the MBS service bearer RB by the base station, and if the base station indicates that data recovery is required, a PDCP status report is triggered. Encapsulate the SN (serial number) of the unsuccessfully received PDCP PDU into the PDCP status report, and then pass the PDCP status report through the uplink RLC channel corresponding to the original PTM downlink RLC channel, or the uplink RLC corresponding to the newly configured PTM downlink RLC channel channel, sent to the base station. According to the new configuration of the MBS service bearer, the PDCP PDU sent by the receiving base station is retransmitted. The PDCP PDU retransmission may be sent in a PTM manner or a PTP manner.
  • Embodiment 8 Another implementation of triggering PDCP status report when MBS service bearer is reconfigured: In Embodiment 8, as shown in FIG. 9 , the terminal sends PDCP status report through the uplink RLC channel corresponding to PTP downlink transmission.
  • the base station side reconfigures the MBS service bearer RB, including 1) still using PTM transmission, but reconfiguring some of the parameters; 2) changing the transmission mode of the RB from PTM to PTP; 3) The transmission mode of the RB is changed from PTM to PTP. PTP is changed to PTM; 4) The transmission mode of the RB is changed from PTM to PTM and PTP at the same time. At the same time when the service bearer is reconfigured, it is indicated that data recovery needs to be performed.
  • the base station side receives the PDCP status report sent by the terminal through the uplink RLC channel corresponding to the original PTP downlink RLC channel, or receives the PDCP status report sent by the terminal through the uplink RLC channel corresponding to the newly configured PTP downlink RLC channel.
  • the base station side retransmits PDCP PDUs that can be retransmitted according to the new configuration of the MBS service bearer according to the PDCP PDUs that the terminal has not successfully received in the PDCP status report.
  • the PDCP PDUs that can be retransmitted refer to PDCP PDUs still stored in the base station cache , and/or PDCP discards PDCP PDUs whose timers have not expired.
  • the retransmission of the PDCP PDU may be sent in a PTM manner or a PTP manner.
  • the terminal side receives the reconfiguration of the MBS service bearer RB by the base station, and if the base station indicates that data recovery is required, a PDCP status report is triggered.
  • the terminal side encapsulates the SN (serial number) of the unsuccessfully received PDCP PDU into the PDCP status report, and then passes the PDCP status report through the uplink RLC channel corresponding to the original PTP downlink RLC channel, or the newly configured PTP downlink RLC channel corresponding to The uplink RLC channel is sent to the base station.
  • the terminal side receives the PDCP PDU retransmission sent by the base station side according to the new configuration of the MBS service bearer.
  • the PDCP PDU retransmission may be sent in a PTM manner or a PTP manner.
  • the terminal receiving the MBS multicast transmission triggers the PDCP status report according to the determined conditions, and sends the PDCP status report to the base station on the designated uplink channel, so that the MBS service transmitted by the PTM can be transmitted at the PDCP layer. achieve reliable transmission.
  • an embodiment of the present disclosure further provides a method for receiving a packet data convergence protocol status, which is applied to the network side, and the method includes:
  • Step 111 when the receiving terminal receives the multicast broadcast service MBS, according to a preset condition, reports the PDCP status report of the packet data convergence protocol; the PDCP status report is sent on a predetermined uplink channel;
  • Step 112 Send a packet data convergence protocol packet data unit PDCP PDU to the terminal for retransmission.
  • the preset conditions include at least one of the following:
  • the terminal side counts the number of lost packets of the packet data convergence protocol packet data unit PDCP PDU, and determines when the number of lost packets of the PDCP PDU reaches a preset threshold;
  • the network side sends PDCP status report polling
  • the network side configures the MBS service bearer reconfiguration message, the reconfiguration message carries a data recovery indication, and the reconfiguration message includes reconfiguration from multicast PTM transmission to unicast PTP transmission, or MRB reconfiguration for multicast PTM transmission.
  • the PDCP status report poll sent by the network side includes one of the following:
  • the network side sends PDCP PDUs on the multicast downlink channel, and the PDCP PDUs include polling bits;
  • the network side sends PDCP status report polling to the terminal on the unicast downlink channel, and the PDCP PDU includes polling bits.
  • sending the PDCP status report poll to the terminal on the unicast downlink channel includes:
  • the predetermined uplink channel includes at least one of the following:
  • the downlink bearer of multicast PTM transmission is configured as RLC UM in RLC unacknowledged mode.
  • RLC UM for this MBS service, when multicast PTM and unicast PTP transmission modes are configured for the terminal at the same time, the uplink RLC UM channel of PTP transmission mode is used.
  • the PDCP status report includes: the sequence number of the PDCP PDU that the terminal fails to receive.
  • sending the packet data convergence protocol packet data unit PDCP PDU retransmission to the terminal includes: sending the PDCP PDU retransmission through the multicast PTM transmission channel of the MRB; or,
  • the PDCP PDU is retransmitted by sending the PDCP PDU on the unicast PTP transmission channel of the MRB.
  • this method is a method on the network side corresponding to the method on the terminal side described above, and all the implementation manners of the above method are applicable to this embodiment, and the same technical effect can also be achieved.
  • a terminal 120 includes: a transceiver 121, a processor 122, and a memory 123, where the memory 123 stores a program executable by the processor 123; the processor 122 implements when the program is executed: when receiving the multicast broadcast service MBS, trigger the PDCP status report of the packet data convergence protocol according to a preset condition; and send the PDCP status report on the predetermined uplink channel.
  • the preset conditions include at least one of the following:
  • the terminal side counts the number of lost packets of the packet data convergence protocol packet data unit PDCP PDU, and determines when the number of lost packets of the PDCP PDU reaches a preset threshold;
  • the terminal side receives the PDCP status report polling sent by the network side;
  • the terminal receives an MBS service bearer reconfiguration message, where the reconfiguration message carries a data recovery indication, and the reconfiguration message includes reconfiguration from multicast PTM transmission to unicast PTP transmission, or MRB reconfiguration for multicast PTM transmission.
  • the PDCP status report polling sent by the terminal side to receive the network side includes one of the following:
  • the PDCP status report polling sent to the terminal on the unicast downlink channel includes:
  • the predetermined uplink channel includes at least one of the following:
  • the downlink bearer of multicast PTM transmission is configured as RLC UM in RLC unacknowledged mode.
  • RLC UM for this MBS service, when multicast PTM and unicast PTP transmission modes are configured for the terminal at the same time, the uplink RLC UM channel of PTP transmission mode is used.
  • the PDCP status report includes: the sequence number of the unsuccessfully received PDCP PDU.
  • the transceiver 91 is further configured to: receive retransmission of the PDCP PDU sent by the network side on the multicast PTM transmission channel of the MRB; or, receive the PDCP PDU sent by the network side on the unicast PTP transmission channel of the MRB. Retransmission.
  • the terminal in this embodiment is a terminal corresponding to the method shown in FIG. 4 , and the implementation manners in the above embodiments are all applicable to the embodiments of the terminal, and the same technical effect can also be achieved. It should be noted here that the above-mentioned terminal provided by the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiment, and can achieve the same technical effect, and the same as the method embodiment in this embodiment is not repeated here. The parts and beneficial effects will be described in detail.
  • an embodiment of the present disclosure further provides an apparatus 130 for reporting the status of a packet data convergence protocol, which is applied to a terminal.
  • the apparatus 130 includes:
  • the processing module 132 is configured to trigger a PDCP status report according to a preset condition when receiving the multicast broadcast service MBS;
  • the transceiver module 131 is configured to send a PDCP status report on a predetermined uplink channel.
  • the preset conditions include at least one of the following:
  • the terminal side counts the number of lost packets of the packet data convergence protocol packet data unit PDCP PDU, and determines when the number of lost packets of the PDCP PDU reaches a preset threshold;
  • the terminal side receives the PDCP status report polling sent by the network side;
  • the terminal receives an MBS service bearer reconfiguration message, where the reconfiguration message carries a data recovery indication, and the reconfiguration message includes reconfiguration from multicast PTM transmission to unicast PTP transmission, or MRB reconfiguration for multicast PTM transmission.
  • the PDCP status report polling sent by the terminal side to receive the network side includes one of the following:
  • the PDCP status report polling sent to the terminal on the unicast downlink channel includes:
  • the predetermined uplink channel includes at least one of the following:
  • the downlink bearer of multicast PTM transmission is configured as RLC UM in RLC unacknowledged mode.
  • RLC UM for this MBS service, when multicast PTM and unicast PTP transmission modes are configured for the terminal at the same time, the uplink RLC UM channel of PTP transmission mode is used.
  • the PDCP status report includes: the sequence number of the unsuccessfully received PDCP PDU.
  • the transceiver module 131 is further configured to: receive retransmission of the PDCP PDU sent by the network side on the multicast PTM transmission channel of the MRB; or, receive the PDCP PDU sent by the network side on the unicast PTP transmission channel of the MRB. Retransmission.
  • the device in this embodiment is a device corresponding to the method shown in FIG. 4 , and the implementation manners in the above embodiments are all applicable to the embodiments of the device, and the same technical effect can also be achieved. It should be noted here that the above-mentioned device provided by the embodiment of the present disclosure can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect, and the same as the method embodiment in this embodiment is not repeated here. The parts and beneficial effects will be described in detail.
  • An embodiment of the present disclosure further provides a network device, including: a transceiver, a processor, and a memory, where a program executable by the processor is stored in the memory; when the processor executes the program, it realizes: a receiving terminal When receiving the multicast broadcast service MBS, according to preset conditions, report the PDCP status report of the Packet Data Convergence Protocol; the PDCP status report is sent on the predetermined uplink channel; Send the Packet Data Convergence Protocol Packet Data Unit PDCP PDU to the terminal Retransmission.
  • a network device including: a transceiver, a processor, and a memory, where a program executable by the processor is stored in the memory; when the processor executes the program, it realizes: a receiving terminal When receiving the multicast broadcast service MBS, according to preset conditions, report the PDCP status report of the Packet Data Convergence Protocol; the PDCP status report is sent on the predetermined uplink channel; Send the Packet Data Con
  • the preset conditions include at least one of the following:
  • the terminal side counts the number of lost packets of the packet data convergence protocol packet data unit PDCP PDU, and determines when the number of lost packets of the PDCP PDU reaches a preset threshold;
  • the network side sends PDCP status report polling
  • the network side configures the MBS service bearer reconfiguration message, the reconfiguration message carries a data recovery indication, and the reconfiguration message includes reconfiguration from multicast PTM transmission to unicast PTP transmission, or MRB reconfiguration for multicast PTM transmission.
  • the PDCP status report poll sent by the network side includes one of the following:
  • the network side sends PDCP PDUs on the multicast downlink channel, and the PDCP PDUs include polling bits;
  • the network side sends PDCP status report polling to the terminal on the unicast downlink channel, and the PDCP PDU includes polling bits.
  • sending the PDCP status report poll to the terminal on the unicast downlink channel includes:
  • the predetermined uplink channel includes at least one of the following:
  • the downlink bearer of multicast PTM transmission is configured as RLC UM in RLC unacknowledged mode.
  • RLC UM for this MBS service, when multicast PTM and unicast PTP transmission modes are configured for the terminal at the same time, the uplink RLC UM channel of PTP transmission mode is used.
  • the PDCP status report includes: the sequence number of the PDCP PDU that the terminal fails to receive.
  • sending the packet data convergence protocol packet data unit PDCP PDU retransmission to the terminal includes: sending the PDCP PDU retransmission through the multicast PTM transmission channel of the MRB; or,
  • the PDCP PDU is retransmitted by sending the PDCP PDU on the unicast PTP transmission channel of the MRB.
  • the network device in this embodiment is a network device corresponding to the method shown in FIG. 8 , and the implementation manners in the above embodiments are all applicable to this embodiment, and the same technical effect can also be achieved. It should be noted here that the above-mentioned network device provided by the embodiments of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effect. The same parts and beneficial effects will be described in detail.
  • Embodiments of the present disclosure also provide an apparatus for receiving a packet data convergence protocol status, which is applied to network equipment, and the apparatus includes:
  • the transceiver module is used for receiving the packet data convergence protocol PDCP status report reported by the terminal according to preset conditions when receiving the multicast broadcast service MBS; the PDCP status report is sent on a predetermined uplink channel; sending packet data to the terminal Convergence Protocol Packet Data Unit PDCP PDU retransmission.
  • the preset conditions include at least one of the following:
  • the terminal side counts the number of lost packets of the packet data convergence protocol packet data unit PDCP PDU, and determines when the number of lost packets of the PDCP PDU reaches a preset threshold;
  • the network side sends PDCP status report polling
  • the network side configures the MBS service bearer reconfiguration message, the reconfiguration message carries a data recovery indication, and the reconfiguration message includes reconfiguration from multicast PTM transmission to unicast PTP transmission, or MRB reconfiguration for multicast PTM transmission.
  • the PDCP status report poll sent by the network side includes one of the following:
  • the network side sends PDCP PDUs on the multicast downlink channel, and the PDCP PDUs include polling bits;
  • the network side sends PDCP status report polling to the terminal on the unicast downlink channel, and the PDCP PDU includes polling bits.
  • sending the PDCP status report poll to the terminal on the unicast downlink channel includes:
  • the predetermined uplink channel includes at least one of the following:
  • the downlink bearer of multicast PTM transmission is configured as RLC UM in RLC unacknowledged mode.
  • RLC UM for this MBS service, when multicast PTM and unicast PTP transmission modes are configured for the terminal at the same time, the uplink RLC UM channel of PTP transmission mode is used.
  • the PDCP status report includes: the sequence number of the PDCP PDU that the terminal fails to receive.
  • sending the packet data convergence protocol packet data unit PDCP PDU retransmission to the terminal includes: sending the PDCP PDU retransmission through the multicast PTM transmission channel of the MRB; or,
  • the PDCP PDU is retransmitted by sending the PDCP PDU on the unicast PTP transmission channel of the MRB.
  • the device in this embodiment is a device corresponding to the method shown in FIG. 8 above, and the implementation manners in each of the above embodiments are applicable to the embodiments of the device, and the same technical effect can also be achieved. It should be noted here that the above-mentioned device provided by the embodiment of the present disclosure can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect, and the same as the method embodiment in this embodiment is not repeated here. The parts and beneficial effects will be described in detail.
  • Embodiments of the present disclosure also provide a processor-readable storage medium storing processor-executable instructions for causing the processor to execute the above-mentioned Methods. All implementation manners in the foregoing method embodiment are applicable to this embodiment, and the same technical effect can also be achieved.
  • the disclosed apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be 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 in this embodiment.
  • each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the computer software product is stored in a storage medium, including several
  • the instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present disclosure.
  • the aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk and other mediums that can store program codes.
  • each component or each step can be decomposed and/or recombined. These disaggregations and/or recombinations should be considered equivalents of the present disclosure.
  • the steps of performing the above-mentioned series of processes can naturally be performed in chronological order in the order described, but need not necessarily be performed in chronological order, and some steps can be performed in parallel or independently of each other.
  • Those of ordinary skill in the art can understand all or any steps or components of the method and device of the present disclosure, and can be implemented in hardware, firmware, or in any computing device (including a processor, storage medium, etc.) or a network of computing devices. , software, or a combination thereof, which can be implemented by those of ordinary skill in the art using their basic programming skills after reading the description of the present disclosure.
  • the objects of the present disclosure can also be achieved by running a program or set of programs on any computing device.
  • the computing device may be a known general purpose device. Therefore, the objects of the present disclosure can also be achieved merely by providing a program product containing program code for implementing the method or apparatus. That is, such a program product also constitutes the present disclosure, and a storage medium storing such a program product also constitutes the present disclosure.
  • the storage medium can be any known storage medium or any storage medium developed in the future.
  • each component or each step can be decomposed and/or recombined. These disaggregations and/or recombinations should be considered equivalents of the present disclosure.
  • the steps of executing the above-described series of processes can naturally be executed in chronological order in the order described, but need not necessarily be executed in chronological order. Certain steps may be performed in parallel or independently of each other.

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Abstract

本公开公开了一种分组数据汇聚协议状态上报、接收方法、终端及设备。终端侧的方法包括：在接收多播广播业务MBS时，按照预设条件，触发分组数据汇聚协议PDCP状态报告；在预定上行信道上发送PDCP状态报告。

Description

分组数据汇聚协议状态上报、接收方法、终端及设备
相关申请的交叉引用
本申请主张在2020年10月23日在中国提交的中国专利申请号No.202011144474.5的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，尤其涉及一种分组数据汇聚协议状态上报、接收方法、终端及设备。
背景技术
MBMS(multimedia broadcast multicast service，多播广播多媒体业务)服务在3G，4G技术中已经长期存在。由于广播多播业务的需求，5G技术中引入了MBMS服务，在5G中称为MBS(Multicast and Broadcast Services，多播广播业务)。5G的MBS业务是在各个小区各自独立发送的。需要进行广播多播传输的业务，映射到广播多播信道中，以便于向多个终端传输，可称为点到多点传输(PTM，Point to Multiple)。一个终端可以同时配置PTM和PTP(Point to Point)传输，如图1所示。
为了保障数据传输可靠性，单播传输中有各种重传机制。单播重传机制的基础是传输通道和反馈通道在基站和终端间一一对应，对于不同终端，具有各自独立的传输通道和反馈通道。
PTM是点到多点的传输，有多个终端接收相同的PDCP PDU，相关技术中无法保障每个终端成功接收PDCP PDU。同时对于多播传输，相关技术针对点到多点的通道，没有反馈通道可用。
发明内容
本公开实施例提供了一种分组数据汇聚协议状态上报、接收方法、终端及设备。可以使得PTM传输的MBS业务在PDCP层实现可靠传输。
为解决上述技术问题，本公开的实施例提供如下技术方案：
一种分组数据汇聚协议状态的上报方法，应用于接收多播广播业务MBS传输的终端，所述方法包括：
在接收多播广播业务MBS时，按照预设条件，触发分组数据汇聚协议PDCP状态报告；
在预定上行信道上发送PDCP状态报告。
可选的，所述预设条件包括以下至少一项：
终端侧统计分组数据汇聚协议分组数据单元PDCP PDU丢包个数，确定PDCP PDU丢包个数达到预设门限时；
终端侧接收网络侧发送的PDCP状态报告轮询；
终端在发生小区切换时；
终端接收到MBS业务承载重配消息，该重配消息中携带数据恢复指示，该重配置消息包括从多播PTM传输重配置为单播PTP传输，或者，对多播PTM传输的MRB重新配置。
可选的，所述终端侧接收网络侧发送的PDCP状态报告轮询包括以下一项：
接收网络侧在多播下行通道上发送的PDCP PDU，从所述PDCP PDU获取轮询比特；
接收网络侧在单播下行通道上发送的PDCP PDU，从所述PDCP PDU获取轮询比特。
可选的，在单播下行通道上向终端发送的PDCP状态报告轮询包括：
针对多播PTM传输的PDCP状态报告轮询；或者，
针对单播PTP传输的PDCP状态报告轮询；或者，
针对多播PTM传输和单播PTP传输的全部PDCP状态报告轮询。
可选的，所述预定上行信道包括以下至少一项：
多播PTM传输下行承载配置为无线链路控制确认模式RLC AM时，与网络侧的下行RLC AM对应的上行RLC AM信道；
多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM时，与网络侧的下行RLC UM对应的上行RLC UM信道；
多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM，针对 该MBS业务，为终端同时配置多播PTM和单播PTP传输方式时，PTP传输方式的上行RLC UM信道。
可选的，所述PDCP状态报告包括：未成功接收的PDCP PDU的序号。
可选的，分组数据汇聚协议状态的上报方法，还包括：
在MRB的多播PTM传输通道上接收网络侧发送的PDCP PDU重传；或者，在MRB的单播PTP传输通道上接收网络侧发送的PDCP PDU重传。
本公开的实施例还提供一种分组数据汇聚协议状态的接收方法，应用于网络侧，所述方法包括：
接收终端在接收多播广播业务MBS时，按照预设条件，上报的分组数据汇聚协议PDCP状态报告；所述PDCP状态报告是在预定上行信道上发送的；
向终端发送分组数据汇聚协议分组数据单元PDCP PDU重传。
可选的，所述预设条件包括以下至少一项：
终端侧统计分组数据汇聚协议分组数据单元PDCP PDU丢包个数，确定PDCP PDU丢包个数达到预设门限时；
网络侧发送PDCP状态报告轮询；
终端发生小区切换时；
网络侧配置MBS业务承载重配消息，该重配消息中携带数据恢复指示，该重配置消息包括从多播PTM传输重配置为单播PTP传输，或者，对多播PTM传输的MRB重新配置。
可选的，所述网络侧发送PDCP状态报告轮询包括以下一项：
网络侧在多播下行通道上发送PDCP PDU，所述PDCP PDU包括轮询比特；
网络侧在单播下行通道上向终端发送PDCP状态报告轮询，所述PDCP PDU包括轮询比特。
可选的，在单播下行通道上向终端发送PDCP状态报告轮询包括：
针对多播PTM传输的PDCP状态报告轮询；或者，
针对单播PTP传输的PDCP状态报告轮询；或者，
针对多播PTM传输和单播PTP传输的全部PDCP状态报告轮询。
可选的，所述预定上行信道包括以下至少一项：
多播PTM传输下行承载配置为无线链路控制确认模式RLC AM时，与网络侧的下行RLC AM对应的上行RLC AM信道；
多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM时，与网络侧的下行RLC UM对应的上行RLC UM信道；
多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM，针对该MBS业务，为终端同时配置多播PTM和单播PTP传输方式时，PTP传输方式的上行RLC UM信道。
可选的，所述PDCP状态报告包括：终端未成功接收的PDCP PDU的序号。
可选的，向终端发送分组数据汇聚协议分组数据单元PDCP PDU重传，包括：通过MRB的多播PTM传输通道发送PDCP PDU重传；或者，
在MBS业务同时映射到多播PTM和单播PTP传输的情况下，通过MRB的的单播PTP传输通道上发送PDCP PDU重传。
本公开的实施例一种终端，包括：收发机，处理器，存储器，所述存储器上存有所述处理器可执行的程序；所述处理器执行所述程序时实现：在接收多播广播业务MBS时，按照预设条件，触发分组数据汇聚协议PDCP状态报告；在预定上行信道上发送PDCP状态报告。
可选的，所述预设条件包括以下至少一项：
终端侧统计分组数据汇聚协议分组数据单元PDCP PDU丢包个数，确定PDCP PDU丢包个数达到预设门限时；
网络侧发送PDCP状态报告轮询；
终端在发生小区切换时；
终端接收到MBS业务承载重配消息，该重配消息中携带数据恢复指示，该重配置消息包括从多播PTM传输重配置为单播PTP传输，或者，对多播PTM传输的MRB重新配置。
本公开的实施例还提供一种分组数据汇聚协议状态的上报装置，应用于终端，所述装置包括：
处理模块，用于在接收多播广播业务MBS时，按照预设条件，触发分组数据汇聚协议PDCP状态报告；
收发模块，用于在预定上行信道上发送PDCP状态报告。
本公开的实施例还提供一种网络设备，包括：收发机，处理器，存储器，所述存储器上存有所述处理器可执行的程序；所述处理器执行所述程序时实现：接收终端在接收多播广播业务MBS时，按照预设条件，上报的分组数据汇聚协议PDCP状态报告；所述PDCP状态报告是在预定上行信道上发送的；向终端发送分组数据汇聚协议分组数据单元PDCP PDU重传。
可选的，所述预设条件包括以下至少一项：
终端侧统计分组数据汇聚协议分组数据单元PDCP PDU丢包个数，确定PDCP PDU丢包个数达到预设门限时；
网络侧发送PDCP状态报告轮询；
终端发生小区切换时；
网络侧配置MBS业务承载重配消息，该重配消息中携带数据恢复指示，该重配置消息包括从多播PTM传输重配置为单播PTP传输，或者，对多播PTM传输的MRB重新配置。
本公开的实施例还提供一种分组数据汇聚协议状态的接收装置，应用于网络设备，所述装置包括：
收发模块，用于接收终端在接收多播广播业务MBS时，按照预设条件，上报的分组数据汇聚协议PDCP状态报告；所述PDCP状态报告是在预定上行信道上发送的；向终端发送分组数据汇聚协议分组数据单元PDCP PDU重传。
本公开的实施例还提供一种处理器可读存储介质，所述处理器可读存储介质存储有处理器可执行指令，所述处理器可执行指令用于使所述处理器执行如上所述的方法。
本公开实施例的有益效果是：
本公开的上述实施例，终端通过在接收多播广播业务MBS时，按照预设条件，触发分组数据汇聚协议PDCP状态报告；在预定上行信道上发送PDCP状态报告。从而可以使得PTM传输的MBS业务在PDCP层实现可靠传输。
附图说明
图1为MBS业务传输示示意图；
图2为基站同时支持PTM和PTP的第一种协议栈架构示意图；
图3为基站同时支持PTM和PTP的第二种协议栈架构示意图；
图4为本公开的终端侧的分组数据汇聚协议状态的上报方法的流程示意图；
图5为本公开的实施例的终端通过上行RLC AM信道发送PDCP状态报告的示意图；
图6为本公开的实施例的多播PTM传输的RLC层配置为RLC AM的RLC信道示意图；
图7为本公开的实施例的终端通过与下行RLC UM配对的上行RLC UM实体传输PDCP状态报告的示意图；
图8为本公开的实施例的多播PTM传输的RLC层配置为RLC UM的RLC信道示意图；
图9为本公开的实施例的终端通过PTP传输方式的上行RLC UM信道发送PDCP状态报告的示意图；
图10为本公开的实施例的用单播PTP的RLC信道发送针对多播PTM传输的PDCP状态报告示意图；
图11为本公开的实施例的网络侧的分组数据汇聚协议状态的接收方法的流程示意图；
图12为本公开的实施例的终端的架构示意图；
图13为本公开的实施例的终端侧的装置的模块示意图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
如图2和图3所示，为基站同时支持PTM和PTP的两种协议栈架构。
图2中，多播和单播映射到不同的无线承载，通过不同的PDCP(分组 汇聚协议)实体，不同的RLC实体传输。
图3中，MBS业务映射到一个无线承载MRB，通过一个PDCP实体，单播和多播通过不同的RLC(无线链路控制)实体及其对应的逻辑信道传输。图2和图3中，单播(PTP)和多播(PTM)都采用不同的物理信道。
如图4所示，本公开的实施例提供一种分组数据汇聚协议状态的上报方法，应用于接收多播广播业务MBS传输的终端，所述方法包括：
步骤41，在接收多播广播业务MBS时，按照预设条件，触发分组数据汇聚协议PDCP状态报告；
步骤42，在预定上行信道上发送PDCP状态报告。
本公开的该实施例，通过在接收多播广播业务MBS时，按照预设条件，触发分组数据汇聚协议PDCP状态报告；在预定上行信道上发送PDCP状态报告。即接收MBS多播传输的终端，按照确定的条件，触发PDCP状态报告，在指定的上行通道上向基站发送PDCP状态报告，从而可以使得PTM传输的MBS业务在PDCP层实现可靠传输。
本公开的一可选的实施例中，所述预设条件包括以下至少一项：
1)终端侧统计分组数据汇聚协议分组数据单元PDCP PDU丢包个数，确定PDCP PDU丢包个数达到预设门限时；
2)终端侧接收网络侧发送的PDCP状态报告轮询；
3)终端在发生小区切换时；
4)终端接收到MBS业务承载重配消息，该重配消息中携带数据恢复指示，该重配置消息包括从多播PTM传输重配置为单播PTP传输，或者，对多播PTM传输的MRB重新配置。
对于上述第1)项，终端侧统计正确接收到的PDCP PDU个数，当PDCP PDU丢包个数达到门限时触发PDCP状态报告。该门限可以是基站配置的，或由协议规定的，或终端侧自行决定的。PDCP PDU丢包个数的统计方式可以是在终端对接收到的PDCP PDU进行重排序(reordering)后统计PDCP SN的gap个数；或在一个确定时间段内，根据RLC PDU接收情况统计确定的未成功接收的PDCP PDU个数。
对于上述第2)项，基站侧发送PDCP状态报告轮询POLL；终端侧接收 网络侧发送的PDCP状态报告轮询。
可选的，所述终端侧接收网络侧发送的PDCP状态报告轮询包括以下一项：
A)接收网络侧在多播下行通道上发送的PDCP PDU，从所述PDCP PDU获取轮询比特；
具体的，网络侧(如基站)在广播方式发送的PDCP PDU中，即PTM传输的PDCP PDU中，包含轮询POLL比特。在此之前，基站可以针对每个终端配置是否需要响应基站侧的PDCP轮询，配置为需要响应基站轮询的终端，才在收到POLL的时候发送PDCP状态报告，其他终端不需响应，即不需要发送PDCP状态报告。
B)接收网络侧在单播下行通道上发送的PDCP PDU，从所述PDCP PDU获取轮询比特。
本公开的一可选的实施例中，在单播下行通道上向终端发送的PDCP状态报告轮询包括：
针对多播PTM传输的PDCP状态报告轮询；或者，
针对单播PTP传输的PDCP状态报告轮询；或者，
针对多播PTM传输和单播PTP传输的全部PDCP状态报告轮询。
具体的，网络侧(如基站)在单播下行通道，即PTP下行通道上，向终端发送轮询。该轮询可以进一步区分为：针对PTM的PDCP状态报告轮询；针对PTP的PDCP状态报告轮询；针对PTM和PTP全部传输的PDCP状态报告轮询，即，要求终端对同一个承载，将采用PTM和PTP传输的所有PDCP PDU统一排序，发送PDCP状态报告。
对于上述第3)项，由网络侧(如基站)配置指示，终端触发在切换时发送PDCP状态报告。
对于上述第4)项，由网络侧(如基站)配置指示，MBS业务承载在从PTM传输重配置为PTP传输时，或对PTM传输的MBS业务重新配置时(包括重新配置下行传输参数，重新配置对应的上行RLC信道)，终端触发PDCP状态报告。
本公开的一可选的实施例中，所述预定上行信道包括以下至少一项：
11)多播PTM传输下行承载配置为无线链路控制确认模式RLC AM时，与网络侧的下行RLC AM对应的上行RLC AM信道；
如图5所示，PTM对应的承载配置为RLC AM，基站为每个终端都配置一个与下行RLC AM信道对应的上行RLC AM信道。终端通过该上行RLC AM信道发送PDCP状态报告。
如图6所示，为多播PTM传输的RLC层配置为RLC AM的RLC信道示意图，多个终端通过共用的下行RLC信道接收PTM传输，每个终端具有一个RLC AM实体，RLC AM实体对应一个上行RLC AM信道，并分别通过各自专用的上行RLC上报PDCP状态报告。
12)多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM时，与网络侧的下行RLC UM对应的上行RLC UM信道；
如图7所示，PTM下行承载配置为RLC UM，基站针对可以发送PDCP状态报告的终端配置与该下行RLC UM配对的上行RLC UM实体，用于传输PDCP状态报告。
如图8所示，多播PTM传输的RLC层配置为RLC UM的RLC信道示意图，基站具有两个RLC UM实体，一个用于发送下行PTM传输，一个用接收PDCP状态报告；多个终端通过共用的下行RLC信道接收PTM传输，每个终端分别具有两个RLC UM实体，一个RLC UM实体对应的RLC信道用于接收PTM传输，另一个RLC UM实体对应的上行RLC信道用于上报PDCP状态报告。
13)多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM，针对该MBS业务，为终端同时配置多播PTM和单播PTP传输方式时，PTP传输方式的上行RLC UM信道。
如图9所示，PTM下行承载配置为RLC UM，基站针对该MBS业务，为终端同时配置PTM和PTP传输方式，终端通过PTP传输方式的上行RLC UM信道，发送PDCP状态报告。
如图10所示，用单播PTP的RLC信道发送针对多播PTM传输的PDCP状态报告示意图，基站具有一个RLC UM实体，以及与终端一一对应的接收每个终端上报的PDCP状态的RLC UM实体；多个终端通过共用的下行RLC 信道接收PTM传输，每个终端分别具有两个RLC UM实体，一个RLC UM实体对应的RLC信道用于接收PTM传输，另一个RLC UM实体对应的上行RLC信道用于上报PDCP状态报告。
本公开的可选的实施例中，所述PDCP状态报告包括：未成功接收的PDCP PDU的序号。
本公开的一可选的实施例中，分组数据汇聚协议状态的上报方法，还可以包括：
步骤43，在MRB的多播PTM传输通道上接收网络侧发送的PDCP PDU重传；或者，
步骤44，在MRB的单播PTP传输通道上接收网络侧发送的PDCP PDU重传。
该步骤43中，具体实现时，基站接收到终端发送的PDCP状态报告后，采用PTM方式，通过PTM的下行RLC信道和物理层信道发送PDCP PDU的重传，该PDCP PDU重传可以是直接重新发送PDCP PDU，或将该PDCP PDU还原为PDCP SDU，封装成新的PDCP PDU传输。
该步骤44中，具体实现时，基站接收到终端发送的PDCP状态报告后，采用PTP方式，前提是该MBS业务同时映射到PTM和PTP传输，则MBS业务对应的PTM传输方式下的PDCP PDU发送错误后，将该PDCP PDU通过该MBS业务对应的PTP传输的下行RLC信道和物理层信道发送PDCP PDU的重传，该PDCP PDU重传可以是直接重新发送PDCP PDU，或将该PDCP PDU还原为PDCP SDU，封装成新的PDCP PDU传输。
下面结合具体的实施例说明上述方法的具体实现过程：
实施例1：终端通过统计接收错误的PDCP PDU个数触发PDCP状态报告的一种实现方式：
实施例1中，如图5或图7所示，终端通过基站配置的与PTM下行RLC信道对应的专用上行RLC信道发送PDCP状态报告。
基站侧配置触发PDCP状态报告的错误PDCP PDU个数门限(该步骤为可选的)。如果错误PDCP PDU个数门限是协议规定的，或终端自行决策的，则该步骤可省略。基站接收终端通过与PTM下行RLC信道对应的上行RLC 信道发送的PDCP状态报告。基站根据PDCP状态报告中的终端未成功接收的PDCP PDU，重新传输可以重传的PDCP PDU，可以重传的PDCP PDU指仍存在基站缓存中的PDCP PDU，和/或PDCP丢弃定时器没有超时的PDCP PDU。具体可以通过PTM方式或PTP方式发送PDCP PDU的重传。
终端侧接收基站侧发送的触发PDCP状态报告的错误PDCP PDU个数门限(该步骤为可选的)。如果错误PDCP PDU个数门限是协议规定的，或终端自行决策的，则该步骤可省略。终端统计正确接收到的PDCP PDU个数，当PDCP PDU丢包个数达到门限时触发PDCP状态报告。PDCP PDU丢包个数的统计方式可以是在终端对接收到的PDCP PDU进行重排序(reordering)后统计PDCP SN的gap个数；或在一个确定时间段内，根据RLC PDU接收情况统计确定的未成功接收的PDCP PDU个数。触发PDCP状态报告后，终端将未成功接收的PDCP PDU的SN(序号)封装到PDCP状态报告中，然后将PDCP状态报告通过与PTM下行RLC信道对应的上行RLC信道发送给基站。终端接收基站侧发送的PDCP PDU重传。该PDCP PDU重传可以是通过PTM方式或PTP方式发送的。
实施例2：终端通过统计接收错误的PDCP PDU个数触发PDCP状态报告的另一种实现：
实施例2中，如图9所示，终端通过与PTP下行传输对应的上行RLC信道发送PDCP状态报告。
基站侧配置触发PDCP状态报告的错误PDCP PDU个数门限(该步骤为可选的)。如果错误PDCP PDU个数门限是协议规定的，或终端自行决策的，则该步骤可省略。基站接收终端通过与PTP下行RLC信道对应的上行RLC信道发送的PDCP状态报告。基站根据PDCP状态报告中的终端未成功接收的PDCP PDU，重新传输可以重传的PDCP PDU，可以重传的PDCP PDU指仍存在基站缓存中的PDCP PDU，和/或PDCP丢弃定时器没有超时的PDCP PDU。具体可以通过PTM方式或PTP方式发送PDCP PDU的重传。
终端侧接收基站侧发送的触发PDCP状态报告的错误PDCP PDU个数门限(该步骤为可选的)。如果错误PDCP PDU个数门限是协议规定的，或终端自行决策的，则该步骤可省略。终端统计针对一个MBS业务承载，正确接 收到的PDCP PDU个数，当PDCP PDU丢包个数达到门限时触发PDCP状态报告。终端在统计丢失的PDCP PDU个数时，可以只统计该MBS业务承载通过PTM接收到的PDCP PDU的丢包数，或同时统计该MBS业务承载通过PTM和PTP接收到的PDCP PDU的丢包数。触发PDCP状态报告后，终端将未成功接收的PDCP PDU的SN(序号)封装到PDCP状态报告中，然后将PDCP状态报告通过与PTP下行RLC信道对应的上行RLC信道发送给基站。终端接收基站侧发送的PDCP PDU重传。该PDCP PDU重传可以是通过PTM方式或PTP方式发送的。
实施例3：终端通过基站POLL触发PDCP状态报告的一种实现方式：
实施例3中，如图5或图7所示，终端通过基站配置的与PTM下行RLC信道对应的专用上行RLC信道发送PDCP状态报告。
基站侧配置终端是否能发送PDCP状态报告。该配置信息可以是在配置PTM的广播或多播信息中配置的，这样的话，所有接收该MBS业务的终端都需要发送状态报告；或通过给终端的下行单播信令发送的，这样的话，只有接收到允许发送PDCP状态报告指示的终端可以发送PDCP状态报告。基站发送轮询请求POLL通知上述配置的终端发送PDCP状态报告。该POLL可以为包含在PDCP数据PDU中的一个比特指示。基站接收终端通过与PTM下行RLC信道对应的上行RLC信道发送的PDCP状态报告。基站根据PDCP状态报告中的终端未成功接收的PDCP PDU，重新传输可以重传的PDCP PDU，可以重传的PDCP PDU指仍存在基站缓存中的PDCP PDU，和/或PDCP丢弃定时器没有超时的PDCP PDU。具体可以通过PTM方式或PTP方式发送PDCP PDU的重传。
终端侧接收基站配置的终端是否能发送PDCP状态报告的信息。如果确定能发送，才进入后续步骤。终端侧接收基站发送的轮询请求POLL。终端侧触发PDCP状态报告，将未成功接收的PDCP PDU的SN(序号)封装到PDCP状态报告中，然后将PDCP状态报告通过与PTM下行RLC信道对应的上行RLC信道发送给基站。终端侧接收基站侧发送的PDCP PDU重传。该PDCP PDU重传可以是通过PTM方式或PTP方式发送的。
实施例4：终端通过基站POLL触发PDCP状态报告的另一种实现方式：
实施例4中，如图9所示，终端通过与PTP下行传输对应的上行RLC信道发送PDCP状态报告。
基站侧配置终端是否能发送PDCP状态报告。该配置信息可以是在配置PTM的广播或多播信息中配置的，这样的话，所有接收该MBS业务的终端都需要发送状态报告；或通过给终端的下行单播信令发送的，这样的话，只有接收到允许发送PDCP状态报告指示的终端可以发送PDCP状态报告。基站侧发送轮询请求POLL通知上述配置的终端发送PDCP状态报告。该POLL可以为包含在PDCP数据PDU中的一个比特指示。基站侧接收终端通过与PTP下行RLC信道对应的上行RLC信道发送的PDCP状态报告。基站侧根据PDCP状态报告中的终端未成功接收的PDCP PDU，重新传输可以重传的PDCP PDU，可以重传的PDCP PDU指仍存在基站缓存中的PDCP PDU，和/或PDCP丢弃定时器没有超时的PDCP PDU。具体可以通过PTM方式或PTP方式发送PDCP PDU的重传。
终端侧接收基站配置的终端是否能发送PDCP状态报告的信息。如果确定能发送，才进入后续步骤。终端侧接收基站发送的轮询请求POLL。终端侧触发PDCP状态报告，将未成功接收的PDCP PDU的SN(序号)封装到PDCP状态报告中，然后将PDCP状态报告通过与PTP下行RLC信道对应的上行RLC信道发送给基站。终端侧接收基站侧发送的PDCP PDU重传。该PDCP PDU重传可以是通过PTM方式或PTP方式发送的。
实施例5：终端配置为切换时触发PDCP状态报告的一种实现方式：
实施例5中，如图5或者图7所示，终端通过基站配置的与PTM下行RLC信道对应的专用上行RLC信道发送PDCP状态报告。
基站侧配置终端在切换时是否需要发送PDCP状态报告。该配置信息可以是在配置PTM的广播或多播信息中配置的，这样的话，所有接收该MBS业务的终端在切换时都需要发送PDCP状态报告；或通过给终端的下行单播信令发送的，这样的话，只有接收到指示的终端需要在切换时发送PDCP状态报告。基站侧接收终端通过与PTM下行RLC信道对应的上行RLC信道发送的PDCP状态报告。基站侧根据PDCP状态报告中的终端未成功接收的PDCP PDU，重新传输可以重传的PDCP PDU，可以重传的PDCP PDU指仍 存在基站缓存中的PDCP PDU，和/或PDCP丢弃定时器没有超时的PDCP PDU。具体可以通过PTM方式或PTP方式发送PDCP PDU的重传。
终端侧接收基站配置的终端是否需要在切换时发送PDCP状态报告的信息。当终端发生小区切换时，触发PDCP状态报告，将未成功接收的PDCP PDU的SN(序号)封装到PDCP状态报告中，然后将PDCP状态报告通过与PTM下行RLC信道对应的上行RLC信道发送给基站。接收基站侧发送的PDCP PDU重传。该PDCP PDU重传可以是通过PTM方式或PTP方式发送的。
实施例6：终端配置为切换时触发PDCP状态报告的另一种实现方式：
实施例6中，如图9所示，终端通过与PTP下行传输对应的上行RLC信道发送PDCP状态报告。
基站侧配置终端在切换时是否需要发送PDCP状态报告。该配置信息可以是在配置PTM的广播或多播信息中配置的，这样的话，所有接收该MBS业务的终端在切换时都需要发送PDCP状态报告；或通过给终端的下行单播信令发送的，这样的话，只有接收到指示的终端需要在切换时发送PDCP状态报告。基站侧接收终端通过与PTP下行RLC信道对应的上行RLC信道发送的PDCP状态报告。基站侧根据PDCP状态报告中的终端未成功接收的PDCP PDU，重新传输可以重传的PDCP PDU，可以重传的PDCP PDU指仍存在基站缓存中的PDCP PDU，和/或PDCP丢弃定时器没有超时的PDCP PDU。具体可以通过PTM方式或PTP方式发送PDCP PDU的重传。
终端侧接收基站配置的终端是否需要在切换时发送PDCP状态报告的信息。当终端发生小区切换时，触发PDCP状态报告，将未成功接收的PDCP PDU的SN(序号)封装到PDCP状态报告中，然后将PDCP状态报告通过与PTP下行RLC信道对应的上行RLC信道发送给基站。终端侧接收基站侧发送的PDCP PDU重传。该PDCP PDU重传可以是通过PTM方式或PTP方式发送的。
实施例7：MBS业务的承载重配时触发PDCP状态报告的一种实现方式：
实施例7中，如图5或者图7所示，终端通过基站配置的与PTM下行RLC信道对应的专用上行RLC信道发送PDCP状态报告。
基站侧对MBS业务承载RB重新配置，包括1)仍然采用PTM传输， 只是对其中部分参数进行重配；2)将该RB的传输方式从PTM变更为PTP；3)将该RB的传输方式从PTP变更为PTM；4)将该RB的传输方式从PTM变更为可以同时通过PTM和PTP。在进行业务承载重配置的同时，指示需要进行数据恢复(data recovery)。基站侧接收终端通过与原PTM下行RLC信道对应的上行RLC信道发送的PDCP状态报告，或接收终端通过与新配置的PTM下行RLC信道对应的上行RLC信道发送的PDCP状态报告。基站侧根据PDCP状态报告中的终端未成功接收的PDCP PDU，按照对该MBS业务承载的新配置，重新传输可以重传的PDCP PDU，可以重传的PDCP PDU指仍存在基站缓存中的PDCP PDU，和/或PDCP丢弃定时器没有超时的PDCP PDU。具体可以通过PTM方式或PTP方式发送PDCP PDU的重传。
终端侧接收基站对MBS业务承载RB的重新配置，如果基站指示需要进行数据恢复(data recovery)，则触发PDCP状态报告。将未成功接收的PDCP PDU的SN(序号)封装到PDCP状态报告中，然后将PDCP状态报告通过与原PTM下行RLC信道对应的上行RLC信道，或与新配置的PTM下行RLC信道对应的上行RLC信道，发送给基站。按照对该MBS业务承载的新配置，接收基站侧发送的PDCP PDU重传。该PDCP PDU重传可以是通过PTM方式或PTP方式发送的。
实施例8：MBS业务的承载重配时触发PDCP状态报告的另一种实现方式：实施例8中，如图9所示，终端通过与PTP下行传输对应的上行RLC信道发送PDCP状态报告。
基站侧对MBS业务承载RB重新配置，包括1)仍然采用PTM传输，只是对其中部分参数进行重配；2)将该RB的传输方式从PTM变更为PTP；3)将该RB的传输方式从PTP变更为PTM；4)将该RB的传输方式从PTM变更为可以同时通过PTM和PTP。在进行业务承载重配置的同时，指示需要进行数据恢复(data recovery)。基站侧接收终端通过与原PTP下行RLC信道对应的上行RLC信道发送的PDCP状态报告，或接收终端通过与新配置的PTP下行RLC信道对应的上行RLC信道发送的PDCP状态报告。基站侧根据PDCP状态报告中的终端未成功接收的PDCP PDU，按照对该MBS业务承载的新配置，重新传输可以重传的PDCP PDU，可以重传的PDCP PDU指仍 存在基站缓存中的PDCP PDU，和/或PDCP丢弃定时器没有超时的PDCP PDU。具体可以通过PTM方式或PTP方式发送PDCP PDU的重传。
终端侧接收基站对MBS业务承载RB的重新配置，如果基站指示需要进行数据恢复(data recovery)，则触发PDCP状态报告。终端侧将未成功接收的PDCP PDU的SN(序号)封装到PDCP状态报告中，然后将PDCP状态报告通过与原PTP下行RLC信道对应的上行RLC信道，或与新配置的PTP下行RLC信道对应的上行RLC信道，发送给基站。终端侧按照对该MBS业务承载的新配置，接收基站侧发送的PDCP PDU重传。该PDCP PDU重传可以是通过PTM方式或PTP方式发送的。
本公开的上述实施例，通过接收MBS多播传输的终端，按照确定的条件，触发PDCP状态报告，在指定的上行通道上向基站发送PDCP状态报告，从而可以使得PTM传输的MBS业务在PDCP层实现可靠传输。
如图11所示，本公开的实施例还提供一种分组数据汇聚协议状态的接收方法，应用于网络侧，所述方法包括：
步骤111，接收终端在接收多播广播业务MBS时，按照预设条件，上报的分组数据汇聚协议PDCP状态报告；所述PDCP状态报告是在预定上行信道上发送的；
步骤112，向终端发送分组数据汇聚协议分组数据单元PDCP PDU重传。
可选的，所述预设条件包括以下至少一项：
终端侧统计分组数据汇聚协议分组数据单元PDCP PDU丢包个数，确定PDCP PDU丢包个数达到预设门限时；
网络侧发送PDCP状态报告轮询；
终端发生小区切换时；
网络侧配置MBS业务承载重配消息，该重配消息中携带数据恢复指示，该重配置消息包括从多播PTM传输重配置为单播PTP传输，或者，对多播PTM传输的MRB重新配置。
可选的，所述网络侧发送PDCP状态报告轮询包括以下一项：
网络侧在多播下行通道上发送PDCP PDU，所述PDCP PDU包括轮询比特；
网络侧在单播下行通道上向终端发送PDCP状态报告轮询，所述PDCP PDU包括轮询比特。
可选的，在单播下行通道上向终端发送PDCP状态报告轮询包括：
针对多播PTM传输的PDCP状态报告轮询；或者，
针对单播PTP传输的PDCP状态报告轮询；或者，
针对多播PTM传输和单播PTP传输的全部PDCP状态报告轮询。
可选的，所述预定上行信道包括以下至少一项：
多播PTM传输下行承载配置为无线链路控制确认模式RLC AM时，与网络侧的下行RLC AM对应的上行RLC AM信道；
多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM时，与网络侧的下行RLC UM对应的上行RLC UM信道；
多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM，针对该MBS业务，为终端同时配置多播PTM和单播PTP传输方式时，PTP传输方式的上行RLC UM信道。
可选的，所述PDCP状态报告包括：终端未成功接收的PDCP PDU的序号。
可选的，向终端发送分组数据汇聚协议分组数据单元PDCP PDU重传，包括：通过MRB的多播PTM传输通道发送PDCP PDU重传；或者，
在MBS业务同时映射到多播PTM和单播PTP传输的情况下，通过MRB的的单播PTP传输通道上发送PDCP PDU重传。
需要说明的是，该方法是与上述终端侧的方法对应的网络侧的方法，上述方法的所有实现方式均适用于该实施例中，也能达到相同的技术效果。
如图12所示，本公开的实施例一种终端120，包括：收发机121，处理器122，存储器123，所述存储器123上存有所述处理器123可执行的程序；所述处理器122执行所述程序时实现：在接收多播广播业务MBS时，按照预设条件，触发分组数据汇聚协议PDCP状态报告；在预定上行信道上发送PDCP状态报告。
可选的，所述预设条件包括以下至少一项：
终端侧统计分组数据汇聚协议分组数据单元PDCP PDU丢包个数，确定 PDCP PDU丢包个数达到预设门限时；
终端侧接收网络侧发送的PDCP状态报告轮询；
终端在发生小区切换时；
终端接收到MBS业务承载重配消息，该重配消息中携带数据恢复指示，该重配置消息包括从多播PTM传输重配置为单播PTP传输，或者，对多播PTM传输的MRB重新配置。
可选的，所述终端侧接收网络侧发送的PDCP状态报告轮询包括以下一项：
接收网络侧在多播下行通道上发送的PDCP PDU，从所述PDCP PDU获取轮询比特；
接收网络侧在单播下行通道上发送的PDCP PDU，从所述PDCP PDU获取轮询比特。
可选的，在单播下行通道上向终端发送的PDCP状态报告轮询包括：
针对多播PTM传输的PDCP状态报告轮询；或者，
针对单播PTP传输的PDCP状态报告轮询；或者，
针对多播PTM传输和单播PTP传输的全部PDCP状态报告轮询。
可选的，所述预定上行信道包括以下至少一项：
多播PTM传输下行承载配置为无线链路控制确认模式RLC AM时，与网络侧的下行RLC AM对应的上行RLC AM信道；
多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM时，与网络侧的下行RLC UM对应的上行RLC UM信道；
多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM，针对该MBS业务，为终端同时配置多播PTM和单播PTP传输方式时，PTP传输方式的上行RLC UM信道。
可选的，所述PDCP状态报告包括：未成功接收的PDCP PDU的序号。
可选的，所述收发机91还用于：在MRB的多播PTM传输通道上接收网络侧发送的PDCP PDU重传；或者，在MRB的单播PTP传输通道上接收网络侧发送的PDCP PDU重传。
需要说明的是，该实施例中的终端是与上述图4所示的方法对应的终端， 上述各实施例中的实现方式均适用于该终端的实施例中，也能达到相同的技术效果。在此需要说明的是，本公开实施例提供的上述终端，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
如图13所示，本公开的实施例还提供一种分组数据汇聚协议状态的上报装置130，应用于终端，所述装置130包括：
处理模块132，用于在接收多播广播业务MBS时，按照预设条件，触发分组数据汇聚协议PDCP状态报告；
收发模块131，用于在预定上行信道上发送PDCP状态报告。
可选的，所述预设条件包括以下至少一项：
终端侧统计分组数据汇聚协议分组数据单元PDCP PDU丢包个数，确定PDCP PDU丢包个数达到预设门限时；
终端侧接收网络侧发送的PDCP状态报告轮询；
终端在发生小区切换时；
终端接收到MBS业务承载重配消息，该重配消息中携带数据恢复指示，该重配置消息包括从多播PTM传输重配置为单播PTP传输，或者，对多播PTM传输的MRB重新配置。
可选的，所述终端侧接收网络侧发送的PDCP状态报告轮询包括以下一项：
接收网络侧在多播下行通道上发送的PDCP PDU，从所述PDCP PDU获取轮询比特；
接收网络侧在单播下行通道上发送的PDCP PDU，从所述PDCP PDU获取轮询比特。
可选的，在单播下行通道上向终端发送的PDCP状态报告轮询包括：
针对多播PTM传输的PDCP状态报告轮询；或者，
针对单播PTP传输的PDCP状态报告轮询；或者，
针对多播PTM传输和单播PTP传输的全部PDCP状态报告轮询。
可选的，所述预定上行信道包括以下至少一项：
多播PTM传输下行承载配置为无线链路控制确认模式RLC AM时，与 网络侧的下行RLC AM对应的上行RLC AM信道；
多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM时，与网络侧的下行RLC UM对应的上行RLC UM信道；
多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM，针对该MBS业务，为终端同时配置多播PTM和单播PTP传输方式时，PTP传输方式的上行RLC UM信道。
可选的，所述PDCP状态报告包括：未成功接收的PDCP PDU的序号。
可选的，所述收发模块131还用于：在MRB的多播PTM传输通道上接收网络侧发送的PDCP PDU重传；或者，在MRB的单播PTP传输通道上接收网络侧发送的PDCP PDU重传。
需要说明的是，该实施例中的装置是与上述图4所示的方法对应的装置，上述各实施例中的实现方式均适用于该装置的实施例中，也能达到相同的技术效果。在此需要说明的是，本公开实施例提供的上述装置，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
本公开的实施例还提供一种网络设备，包括：收发机，处理器，存储器，所述存储器上存有所述处理器可执行的程序；所述处理器执行所述程序时实现：接收终端在接收多播广播业务MBS时，按照预设条件，上报的分组数据汇聚协议PDCP状态报告；所述PDCP状态报告是在预定上行信道上发送的；向终端发送分组数据汇聚协议分组数据单元PDCP PDU重传。
可选的，所述预设条件包括以下至少一项：
终端侧统计分组数据汇聚协议分组数据单元PDCP PDU丢包个数，确定PDCP PDU丢包个数达到预设门限时；
网络侧发送PDCP状态报告轮询；
终端发生小区切换时；
网络侧配置MBS业务承载重配消息，该重配消息中携带数据恢复指示，该重配置消息包括从多播PTM传输重配置为单播PTP传输，或者，对多播PTM传输的MRB重新配置。
可选的，所述网络侧发送PDCP状态报告轮询包括以下一项：
网络侧在多播下行通道上发送PDCP PDU，所述PDCP PDU包括轮询比特；
网络侧在单播下行通道上向终端发送PDCP状态报告轮询，所述PDCP PDU包括轮询比特。
可选的，在单播下行通道上向终端发送PDCP状态报告轮询包括：
针对多播PTM传输的PDCP状态报告轮询；或者，
针对单播PTP传输的PDCP状态报告轮询；或者，
针对多播PTM传输和单播PTP传输的全部PDCP状态报告轮询。
可选的，所述预定上行信道包括以下至少一项：
多播PTM传输下行承载配置为无线链路控制确认模式RLC AM时，与网络侧的下行RLC AM对应的上行RLC AM信道；
多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM时，与网络侧的下行RLC UM对应的上行RLC UM信道；
多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM，针对该MBS业务，为终端同时配置多播PTM和单播PTP传输方式时，PTP传输方式的上行RLC UM信道。
可选的，所述PDCP状态报告包括：终端未成功接收的PDCP PDU的序号。
可选的，向终端发送分组数据汇聚协议分组数据单元PDCP PDU重传，包括：通过MRB的多播PTM传输通道发送PDCP PDU重传；或者，
在MBS业务同时映射到多播PTM和单播PTP传输的情况下，通过MRB的的单播PTP传输通道上发送PDCP PDU重传。
需要说明的是，该实施例中的网络设备是与上述图8所示的方法对应的网络设备，上述各实施例中的实现方式均适用于该实施例中，也能达到相同的技术效果。在此需要说明的是，本公开实施例提供的上述网络设备，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
本公开的实施例还提供一种分组数据汇聚协议状态的接收装置，应用于网络设备，所述装置包括：
收发模块，用于接收终端在接收多播广播业务MBS时，按照预设条件，上报的分组数据汇聚协议PDCP状态报告；所述PDCP状态报告是在预定上行信道上发送的；向终端发送分组数据汇聚协议分组数据单元PDCP PDU重传。
可选的，所述预设条件包括以下至少一项：
终端侧统计分组数据汇聚协议分组数据单元PDCP PDU丢包个数，确定PDCP PDU丢包个数达到预设门限时；
网络侧发送PDCP状态报告轮询；
终端发生小区切换时；
网络侧配置MBS业务承载重配消息，该重配消息中携带数据恢复指示，该重配置消息包括从多播PTM传输重配置为单播PTP传输，或者，对多播PTM传输的MRB重新配置。
可选的，所述网络侧发送PDCP状态报告轮询包括以下一项：
网络侧在多播下行通道上发送PDCP PDU，所述PDCP PDU包括轮询比特；
网络侧在单播下行通道上向终端发送PDCP状态报告轮询，所述PDCP PDU包括轮询比特。
可选的，在单播下行通道上向终端发送PDCP状态报告轮询包括：
针对多播PTM传输的PDCP状态报告轮询；或者，
针对单播PTP传输的PDCP状态报告轮询；或者，
针对多播PTM传输和单播PTP传输的全部PDCP状态报告轮询。
可选的，所述预定上行信道包括以下至少一项：
多播PTM传输下行承载配置为无线链路控制确认模式RLC AM时，与网络侧的下行RLC AM对应的上行RLC AM信道；
多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM时，与网络侧的下行RLC UM对应的上行RLC UM信道；
多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM，针对该MBS业务，为终端同时配置多播PTM和单播PTP传输方式时，PTP传输方式的上行RLC UM信道。
可选的，所述PDCP状态报告包括：终端未成功接收的PDCP PDU的序号。
可选的，向终端发送分组数据汇聚协议分组数据单元PDCP PDU重传，包括：通过MRB的多播PTM传输通道发送PDCP PDU重传；或者，
在MBS业务同时映射到多播PTM和单播PTP传输的情况下，通过MRB的的单播PTP传输通道上发送PDCP PDU重传。
需要说明的是，该实施例中的装置是与上述图8所示的方法对应的装置，上述各实施例中的实现方式均适用于该装置的实施例中，也能达到相同的技术效果。在此需要说明的是，本公开实施例提供的上述装置，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
本公开的实施例还提供一种处理器可读存储介质，所述处理器可读存储介质存储有处理器可执行指令，所述处理器可执行指令用于使所述处理器执行如上所述的方法。上述方法实施例中的所有实现方式均适用于该实施例中，也能达到相同的技术效果。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本公开的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本公开所提供的实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接， 可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本公开各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本公开的技术方案本质上或者说对相关技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本公开各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
此外，需要指出的是，在本公开的装置和方法中，显然，各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且，执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行，但是并不需要一定按照时间顺序执行，某些步骤可以并行或彼此独立地执行。对本领域的普通技术人员而言，能够理解本公开的方法和装置的全部或者任何步骤或者部件，可以在任何计算装置(包括处理器、存储介质等)或者计算装置的网络中，以硬件、固件、软件或者它们的组合加以实现，这是本领域普通技术人员在阅读了本公开的说明的情况下运用他们的基本编程技能就能实现的。
因此，本公开的目的还可以通过在任何计算装置上运行一个程序或者一组程序来实现。所述计算装置可以是公知的通用装置。因此，本公开的目的也可以仅仅通过提供包含实现所述方法或者装置的程序代码的程序产品来实现。也就是说，这样的程序产品也构成本公开，并且存储有这样的程序产 品的存储介质也构成本公开。显然，所述存储介质可以是任何公知的存储介质或者将来所开发出来的任何存储介质。还需要指出的是，在本公开的装置和方法中，显然，各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且，执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行，但是并不需要一定按照时间顺序执行。某些步骤可以并行或彼此独立地执行。
以上所述的是本公开的可选实施方式，应当指出对于本技术领域的普通人员来说，在不脱离本公开所述的原理前提下还可以作出若干改进和润饰，这些改进和润饰也在本公开的保护范围内。

Claims (21)

  1. 一种分组数据汇聚协议状态上报方法，应用于接收多播广播业务MBS传输的终端，包括：
    在接收多播广播业务MBS时，按照预设条件，触发分组数据汇聚协议PDCP状态报告；
    在预定上行信道上发送PDCP状态报告。
  2. 根据权利要求1所述的分组数据汇聚协议状态上报方法，其中，所述预设条件包括以下至少一项：
    终端侧统计分组数据汇聚协议分组数据单元PDCP PDU丢包个数，确定PDCP PDU丢包个数达到预设门限时；
    终端侧接收网络侧发送的PDCP状态报告轮询；
    终端在发生小区切换时；
    终端接收到MBS业务承载重配消息，该重配消息中携带数据恢复指示，该重配置消息包括从多播PTM传输重配置为单播PTP传输，或者，对多播PTM传输的MRB重新配置。
  3. 根据权利要求2所述的分组数据汇聚协议状态上报方法，其中，所述终端侧接收网络侧发送的PDCP状态报告轮询包括以下一项：
    接收网络侧在多播下行通道上发送的PDCP PDU，从所述PDCP PDU获取轮询比特；
    接收网络侧在单播下行通道上发送的PDCP PDU，从所述PDCP PDU获取轮询比特。
  4. 根据权利要求3所述的分组数据汇聚协议状态上报方法，其中，在单播下行通道上向终端发送的PDCP状态报告轮询包括：
    针对多播PTM传输的PDCP状态报告轮询；或者，
    针对单播PTP传输的PDCP状态报告轮询；或者，
    针对多播PTM传输和单播PTP传输的全部PDCP状态报告轮询。
  5. 根据权利要求1所述的分组数据汇聚协议状态上报方法，其中，所述预定上行信道包括以下至少一项：
    多播PTM传输下行承载配置为无线链路控制确认模式RLC AM时，与网络侧的下行RLC AM对应的上行RLC AM信道；
    多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM时，与网络侧的下行RLC UM对应的上行RLC UM信道；
    多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM，针对该MBS业务，为终端同时配置多播PTM和单播PTP传输方式时，PTP传输方式的上行RLC UM信道。
  6. 根据权利要求1所述的分组数据汇聚协议状态上报方法，其中，所述PDCP状态报告包括：未成功接收的PDCP PDU的序号。
  7. 根据权利要求1所述的分组数据汇聚协议状态上报方法，其中，还包括：
    在MRB的多播PTM传输通道上接收网络侧发送的PDCP PDU重传；
    或者，
    在MRB的单播PTP传输通道上接收网络侧发送的PDCP PDU重传。
  8. 一种分组数据汇聚协议状态接收方法，其中，应用于网络侧，包括：
    接收终端在接收多播广播业务MBS时，按照预设条件，上报的分组数据汇聚协议PDCP状态报告；所述PDCP状态报告是在预定上行信道上发送的；
    向终端发送分组数据汇聚协议分组数据单元PDCP PDU重传。
  9. 根据权利要求8所述的分组数据汇聚协议状态接收方法，其中，所述预设条件包括以下至少一项：
    终端侧统计分组数据汇聚协议分组数据单元PDCP PDU丢包个数，确定PDCP PDU丢包个数达到预设门限时；
    网络侧发送PDCP状态报告轮询；
    终端发生小区切换时；
    网络侧配置MBS业务承载重配消息，该重配消息中携带数据恢复指示，该重配置消息包括从多播PTM传输重配置为单播PTP传输，或者，对多播PTM传输的MRB重新配置。
  10. 根据权利要求9所述的分组数据汇聚协议状态接收方法，其中，所述网络侧发送PDCP状态报告轮询包括以下一项：
    网络侧在多播下行通道上发送PDCP PDU，所述PDCP PDU包括轮询比特；
    网络侧在单播下行通道上向终端发送PDCP状态报告轮询，所述PDCP PDU包括轮询比特。
  11. 根据权利要求10所述的分组数据汇聚协议状态接收方法，其中，在单播下行通道上向终端发送PDCP状态报告轮询包括：
    针对多播PTM传输的PDCP状态报告轮询；或者，
    针对单播PTP传输的PDCP状态报告轮询；或者，
    针对多播PTM传输和单播PTP传输的全部PDCP状态报告轮询。
  12. 根据权利要求8所述的分组数据汇聚协议状态接收方法，其中，所述预定上行信道包括以下至少一项：
    多播PTM传输下行承载配置为无线链路控制确认模式RLC AM时，与网络侧的下行RLC AM对应的上行RLC AM信道；
    多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM时，与网络侧的下行RLC UM对应的上行RLC UM信道；
    多播PTM传输下行承载配置为无线链路控制非确认模式RLC UM，针对该MBS业务，为终端同时配置多播PTM和单播PTP传输方式时，PTP传输方式的上行RLC UM信道。
  13. 根据权利要求8所述的分组数据汇聚协议状态接收方法，其中，所述PDCP状态报告包括：终端未成功接收的PDCP PDU的序号。
  14. 根据权利要求8所述的分组数据汇聚协议状态接收方法，其中，向终端发送分组数据汇聚协议分组数据单元PDCP PDU重传，包括：
    通过MRB的多播PTM传输通道发送PDCP PDU重传；或者，
    在MBS业务同时映射到多播PTM和单播PTP传输的情况下，通过MRB的的单播PTP传输通道上发送PDCP PDU重传。
  15. 一种终端，包括：收发机，处理器，存储器，所述存储器上存有所述处理器可执行的程序；所述处理器执行所述程序时实现：在接收多播广播业务MBS时，按照预设条件，触发分组数据汇聚协议PDCP状态报告；在预定上行信道上发送PDCP状态报告。
  16. 根据权利要求15所述的终端，其中，所述预设条件包括以下至少一项：
    终端侧统计分组数据汇聚协议分组数据单元PDCP PDU丢包个数，确定PDCP PDU丢包个数达到预设门限时；
    网络侧发送PDCP状态报告轮询；
    终端在发生小区切换时；
    终端接收到MBS业务承载重配消息，该重配消息中携带数据恢复指示，该重配置消息包括从多播PTM传输重配置为单播PTP传输，或者，对多播PTM传输的MRB重新配置。
  17. 一种分组数据汇聚协议状态上报装置，应用于终端，包括：
    处理模块，用于在接收多播广播业务MBS时，按照预设条件，触发分组数据汇聚协议PDCP状态报告；
    收发模块，用于在预定上行信道上发送PDCP状态报告。
  18. 一种网络设备，包括：收发机，处理器，存储器，所述存储器上存有所述处理器可执行的程序；所述处理器执行所述程序时实现：接收终端在接收多播广播业务MBS时，按照预设条件，上报的分组数据汇聚协议PDCP状态报告；所述PDCP状态报告是在预定上行信道上发送的；向终端发送分组数据汇聚协议分组数据单元PDCP PDU重传。
  19. 根据权利要求18所述的网络设备，其中，所述预设条件包括以下至少一项：
    终端侧统计分组数据汇聚协议分组数据单元PDCP PDU丢包个数，确定PDCP PDU丢包个数达到预设门限时；
    网络侧发送PDCP状态报告轮询；
    终端发生小区切换时；
    网络侧配置MBS业务承载重配消息，该重配消息中携带数据恢复指示，该重配置消息包括从多播PTM传输重配置为单播PTP传输，或者，对多播PTM传输的MRB重新配置。
  20. 一种分组数据汇聚协议状态接收装置，应用于网络设备，包括：
    收发模块，用于接收终端在接收多播广播业务MBS时，按照预设条件， 上报的分组数据汇聚协议PDCP状态报告；所述PDCP状态报告是在预定上行信道上发送的；向终端发送分组数据汇聚协议分组数据单元PDCP PDU重传。
  21. 一种处理器可读存储介质，其中，所述处理器可读存储介质存储有处理器可执行指令，所述处理器可执行指令用于使所述处理器执行权利要求1至7任一项所述的方法或者如权利要求8至14任一项所述的方法。
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