WO2019233056A1 - 一种下行数据的接收方法及终端设备 - Google Patents

一种下行数据的接收方法及终端设备 Download PDF

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Publication number
WO2019233056A1
WO2019233056A1 PCT/CN2018/118255 CN2018118255W WO2019233056A1 WO 2019233056 A1 WO2019233056 A1 WO 2019233056A1 CN 2018118255 W CN2018118255 W CN 2018118255W WO 2019233056 A1 WO2019233056 A1 WO 2019233056A1
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layer
lte rlc
pdcp layer
rlc layer
data packets
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PCT/CN2018/118255
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English (en)
French (fr)
Inventor
袁锴
徐海博
崔立伟
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华为技术有限公司
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Priority to CN201880046791.8A priority Critical patent/CN110915255B/zh
Publication of WO2019233056A1 publication Critical patent/WO2019233056A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and terminal equipment (user equipment) for receiving downlink data.
  • the network architecture of EN-DC includes:
  • the UE is simultaneously connected to a base station (Evolved Node B, eNB) of a 4G long term evolution (LTE) access network, and a base station (5G Node B, En-gNB) of a 5G NR.
  • eNB is the master node (MN) in EN-DC, and is also called MeNB in EN-DC
  • En-gNB is the secondary node (SN) in EN-DC, and in EN-DC Also called SgNB.
  • the eNB is connected to the mobility management entity (MME) and the serving gateway (SGW) of the 4G core network through the S1-C interface and the S1-U interface, respectively.
  • MME mobility management entity
  • SGW serving gateway
  • eNB and En-gNB are connected through X2 port.
  • Cell group In EN-DC, cells allocated to the UE and belonging to MeNB and SgNB, respectively, are divided into two groups. Among them, a cell belonging to MeNB is called a cell group (MCG) under the primary node in EN-DC, and a cell belonging to SgNB is called a cell group (SCG) under secondary node in EN-DC;
  • MCG cell group
  • SCG cell group
  • Radio link control (RLC) bearer In a cell group, the RLC configuration and logical channel configuration of a radio bearer are called RLC bearers;
  • MCG bearer RLC bearer is only configured on MCG radio bearer
  • RLC bearer is only configured on SCG radio bearer
  • RLC bearer is configured in MCG and SCG radio bearer at the same time;
  • MN terminated bearer PDCP radio bearer at MeNB
  • SN terminated bearer PDCP radio bearer on SgNB;
  • MCG bearer MCG bearer
  • SCG bearer SCG bearer
  • split bearer MCG bearer
  • MCG bearer terminated by MN From the network side, there are six types of bearers: MCG bearer terminated by MN, SCG bearer terminated by MN, split bearer terminated by MN, MCG bearer terminated by SN, SCG bearer terminated by SN, and split bearer terminated by SN.
  • LTE + NR DC ie EN-DC
  • EN-DC LTE + NR DC
  • the current protocol stipulates that the PDCP layer of the LTE protocol stack does not have a reordering function.
  • the current packet stacking data convergence protocol (PDCP) layer of the UE protocol stack uses PDCP of NR.
  • PDCP reordering basic function When the sequence number of the PDCP layer received packets is out of order, start the reordering timer. When the timer expires, the sorted data packet is reported; or if the reordering is successful, the sorted data packet is reported.
  • the RLC layer of the LTE network reorders the data packets.
  • the LTE RLC layer reordering timer is also started.
  • the LTE RLC layer reports the sorted data packet to the NR PDCP layer.
  • the NR PDCP layer uploads the sorted data packets to the application's data processing module.
  • the NR PDCP layer receives the data packets reported by the LTE RLC layer, it will fail due to LTE RLC.
  • the data packets reported by the layer are not within the receiving window of the NR PDCP layer, and the sorted data packets uploaded by the LTERLC layer are discarded, resulting in packet loss of downlink received data.
  • Embodiments of the present invention provide a method and a UE for receiving downlink data, which can ensure complete reception of a downlink.
  • a method for receiving downlink data is provided.
  • the LTE RLC layer of the UE receives downlink packet data from the LTE access network, and the NR RLC layer of the UE receives downlink packet data from the NR access network; when the UE ’s After the reordering timer of the NR PDCP layer expires, the NR PDCP layer of the UE obtains the ordered first set of data packets; and when the reordering timer of the NR PDCP layer of the UE expires, the UE's The NR PDCP layer receives the ordered second group of data packets from the LTERLC layer of the UE; the NR PDCP layer of the UE reorders the first group of data packets and the second group of data packets to obtain a third group A data packet, sending the third group of data packets to a higher layer of the UE.
  • the LTE RLC layer of the UE receives downlink packet data from the LTE access network, and the NR RLC layer of the UE receives downlink packet data from the NR access network;
  • the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE obtains the ordered first group of data packets, and the NR PDCP layer of the UE does not directly report the ordered first group of data Packet, but after the NR PDCP layer of the UE receives the ordered second set of data packets from the LTERLC layer of the UE, the NR PDCP layer of the UE sends the first set of data packets and the second set of data packets Group data packets are reordered to obtain a third group of data packets, and then send the third group of data packets to a higher layer of the UE, so as to prevent the first group of data
  • the NR PDCP layer of the UE sends a first message to the LTE RLC layer of the UE, where the first message It is used to instruct the UE's LTE RLC layer to send ordered data packets to the UE's NR PDCP layer.
  • the UE's LTE RLC layer does not wait for the UE's LTE RLC layer to reorder successfully according to the first message.
  • the reordering timer of the LTE RLC layer of the UE times out and reports the sorted second group of data packets to the NR PDCP layer of the UE.
  • the NR PDCP layer of the UE when the reordering timer of the NR PDCP layer of the UE expires, notifies the LTE RLC layer of the UE so that the LTE RLC layer of the UE does not equal the The UE's LTE RLC layer reordering succeeds or the UE's LTE RLC layer reordering timer expires, and reports the sorted second group of data packets to the UE's NR PDCP layer, thereby ensuring complete downlink reception. While ensuring timeliness.
  • the LTE RLC layer of the UE does not wait for the UE's LTE RLC layer to reorder successfully or the UE's LTE RLC layer's reordering timer expires according to the first message.
  • the NR PDCP layer reports the ordered second set of data packets
  • the UE's LTE RLC layer sends The NR PDCP layer of the UE reports the ordered fourth group of data packets.
  • the LTE RLC layer of the UE reports the ordering to the NR PDCP layer of the UE.
  • the fourth group of data packets can ensure the integrity of the reported data.
  • the NR PDCP layer of the UE sends a first message to the LTE RLC layer of the UE, where the first message It is used to instruct the UE's LTE RLC layer to send ordered data packets to the UE's NR PDCP layer.
  • the UE's LTE RLC layer does not wait for the UE's LTE RLC layer reorganization success according to the first message. Report the sorted second group of data packets to the NR PDCP layer of the UE.
  • the NR PDCP layer of the UE when the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE notifies the LTE RLC layer of the UE so that the LTE RLC layer of the UE does not equal the The UE's successful reconfiguration of the LTE RLC layer reports the sorted second group of data packets to the UE's NR PDCP layer, thereby ensuring timeliness while ensuring complete downlink reception.
  • the LTE RLC layer of the UE does not wait for the reconfiguration of the LTE RLC layer of the UE according to the first message to report the sorted second group of data packets to the NR PDCP layer of the UE.
  • the LTE RLC layer of the UE reports the fourth group of data packets after the reorganization is successful to the NR PDCP layer of the UE.
  • the LTE RLC layer of the UE reports to the NR PDCP layer of the UE a successfully reassembled fourth data packet, which can ensure the integrity of the reported data. .
  • the NR PDCP layer of the UE reports the fourth group of data packets and the The second group of data packets is processed for repeated detection.
  • duplicate data packets in the fourth group of data packets and the second group of data packets may be deleted.
  • the NR PDCP layer of the UE sends a second message to the LTE RLC layer of the UE, where the second message It is used to instruct the LTE RLC layer of the UE to report to the NR PDCP layer of the UE how long the reordering timer of the LTE RLC layer of the UE still has, and how long the timeout expires.
  • the LTE RLC layer of the UE according to the first Two messages report to the UE's NR PDCP layer how long the reordering timer of the UE's LTE RLC layer has timed out, and the NR PDCP layer of the UE extends the NR PDCP of the UE according to the duration information The length of the reordering timer at the layer.
  • the LTE RLC layer of the UE reports to the NR PDCP layer of the UE. Report the sorted second group of data packets.
  • the delay reporting of the data packet of the NR and PDCP layer can be achieved without changing the reordering process of the LTE and RLC layer.
  • the NR PDCP layer of the UE determines the duration indicated by the duration information
  • the extendable duration of the reordering timer that is less than or equal to the NR PDCP layer of the UE.
  • the extendable duration of the reordering timer of the NR PDCP layer is taken into consideration, so as to avoid impact on services with high timeliness requirements.
  • the NR PDCP layer of the UE sends a second message to the LTE RLC layer of the UE, where the second message It is used to instruct the LTE RLC layer of the UE to report to the NR PDCP layer of the UE how long the reordering timer of the LTE RLC layer of the UE still has, and how long the timeout expires.
  • the LTE RLC layer of the UE according to the first Two messages report to the UE's NR PDCP layer how long the reordering timer of the UE's LTE RLC layer has timed out.
  • the UE's NR PDCP layer determines that the duration indicated by the duration information is greater than the duration. Extendable duration of the reordering timer of the NR PDCP layer of the UE, the NR PDCP layer of the UE sends a third message to the LTE RLC layer of the UE, the third message is used to indicate the LTE RLC of the UE The layer immediately reports the sorted data packet. The UE's LTE RLC layer does not wait for the UE's LTE RLC layer reordering success or the UE's LTE RLC layer reordering timer to expire according to the third message. The NR PDCP layer of the UE reports the ordered second group of data packets.
  • the extendable duration of the reordering timer of the NR PDCP layer is considered.
  • the LTE RLC layer is notified to report the ordered data immediately.
  • the LTE RLC layer of the UE does not wait for the UE's LTE RLC layer reordering success or the UE's LTE RLC layer reordering timer expires according to the third message.
  • the NR PDCP layer reports the ordered second set of data packets
  • the UE's LTE RLC layer reordering succeeds or the UE's LTE RLC layer reordering timer expires the UE's LTE RLC layer sends
  • the NR PDCP layer of the UE reports the ordered fourth group of data packets.
  • the LTE RLC layer of the UE reports the ordering to the NR PDCP layer of the UE.
  • the fourth group of data packets can ensure the integrity of the reported data.
  • the NR PDCP layer of the UE sends a fourth message to the LTE RLC layer of the UE, where the fourth message It is used to instruct the UE's LTE RLC layer to report the UE's LTE RLC layer acknowledgement mode (AM) mode packet reassembly status to the UE's NR PDCP layer.
  • AM acknowledgement mode
  • the UE's LTE RLC layer The fourth message reports to the UE's NR PDCP layer the AM mode packet reassembly status of the UE's LTE RLC layer, and the UE's NR PDCP layer extends the weight of the UE's NR PDCP layer according to the reconfiguration status. The duration of the sorting timer. After the UE's LTE RLC layer AM mode data packet is successfully reorganized, the UE's LTE RLC layer reports the successfully reassembled second group of data packets to the UE's NR PDCP layer.
  • the delay reporting of the data packet of the NR PDCP layer can be achieved without changing the reorganization process of the LTE RLC layer.
  • the NR PDCP layer of the UE before the NR PDCP layer of the UE extends the duration of the reordering timer of the NR PDCP layer of the UE before the NR PDCP layer of the UE determines the The reconfiguration of the AM mode data packet of the UE's LTE RLC layer also requires a time less than or equal to the extendable duration of the reordering timer of the NR PDCP layer of the UE.
  • the extendable duration of the reordering timer of the NR PDCP layer is taken into consideration, so as to avoid impact on services with high timeliness requirements.
  • the NR PDCP layer of the UE sends a fourth message to the LTE RLC layer of the UE, where the fourth message It is used to instruct the UE's LTE RLC layer to report to the UE's NR PDCP layer the AM mode packet reassembly status of the UE's LTE RLC layer, and the UE's LTE RLC layer to the UE according to the fourth message.
  • the NR PDCP layer of the UE reports the AM mode packet reassembly status of the UE's LTE and RLC layer, and the NR PDCP layer of the UE determines the reconfiguration of the AM mode data packet of the LTE and RLC layer of the UE indicated by the reconfiguration status.
  • the time required is longer than the extendable duration of the reordering timer of the NR PDCP layer of the UE, and the NR PDCP layer of the UE sends a fifth message to the LTE RLC layer of the UE, where the fifth message is used to indicate
  • the LTE RLC layer of the UE immediately reports the sorted data packet, and the LTE RLC layer of the UE does not wait for the UE's LTE RLC layer to be successfully restructured according to the fifth message, and reports to the NR PDCP layer of the UE Sorted second group of packets.
  • the extendable duration of the reordering timer of the NR PDCP layer is considered. When the extendable duration of the reordering timer of the NR PDCP layer does not meet the requirements, the LTE RLC layer is notified to report the ordered data immediately.
  • Package solution to avoid impact on services with high timeliness requirements.
  • the LTE RLC layer of the UE does not wait for the reconfiguration of the LTE RLC layer of the UE according to the fifth message to report the sorted second set of data packets to the NR PDCP layer of the UE.
  • the LTE RLC layer of the UE reports the fourth group of data packets after the reorganization is successful to the NR PDCP layer of the UE.
  • the LTE RLC layer of the UE reports to the NR PDCP layer of the UE a successfully reassembled fourth data packet, which can ensure the integrity of the reported data. .
  • the UE's LTE RLC layer reports the fourth group of data packets to the UE's NR PDCP layer
  • the UE's NR PDCP layer reports the fourth group of data packets and the second group of data
  • the packet undergoes repeated detection processing.
  • duplicate data packets in the fourth group of data packets and the second group of data packets may be deleted.
  • the NR PDCP layer of the UE performs repeated detection processing on the first group of data packets and the second group of data packets, and deletes the first group of data packets and the second group of data packets.
  • the data packet is sent to a higher layer of the UE.
  • duplicate data packets in the first group of data packets and the second group of data packets may be deleted.
  • a method for receiving downlink data is provided.
  • the LTE RLC layer of the UE receives downlink packet data from the LTE access network
  • the NR RLC layer of the UE receives downlink packet data from the NR access network; wherein the UE
  • the reordering function of the LTE RLC layer is turned off, and the reordering function is completed by the NR PDCP layer of the UE.
  • the reordering function of the UE's LTE RLC layer is turned off, and the reordering function is completed by the UE's NR PDCP layer, thereby avoiding packet loss caused by simultaneous reordering of the NR PDCP layer and the LTE RLC layer. Therefore, complete reception of the downlink can be guaranteed.
  • the reordering function of the LTE RLC layer of the UE is pre-configured to be turned off. This method is simple and easy to implement.
  • the reordering function of the LTE RLC layer of the UE is turned off.
  • This method can avoid reordering of the NR PDCP layer and the LTE RLC layer at the same time, but does not affect the reordering of the LTE RLC layer when the NR PDCP layer is not reordered, which can improve data processing efficiency.
  • the UE receives a Radio Resource Control (RRC) message; and according to the RRC message, disables the reordering function of the UE's LTE RLC layer.
  • RRC Radio Resource Control
  • This method can improve the control of the UE on the network side, and the network side can flexibly control the reordering function of the UE's LTE RLC layer to be turned off according to the resource scheduling situation.
  • an embodiment of the present invention provides a UE that can implement the functions performed in the method design of the first aspect or the second aspect, and the functions may be implemented by hardware or corresponding software may be executed by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the structure of the UE includes a processor, and the processor is configured to support the UE to perform a corresponding function in the method of the first aspect or the second aspect.
  • the UE may further include a memory for coupling with the processor, which stores program instructions and data necessary for the UE.
  • the UE may further include a communication interface, which is used to send or receive information and the like.
  • an embodiment of the present invention provides a communication device.
  • the communication device may be, for example, a chip.
  • the communication device may be provided in a UE.
  • the communication device includes a processor and an interface.
  • the processor is configured to support the communication device to perform a corresponding function in the method of the first aspect or the second aspect.
  • the interface is used to support communication between the communication device and other communication devices or other network elements.
  • the communication device may further include a memory for coupling with the processor, which stores program instructions and data necessary for the communication device.
  • an embodiment of the present invention provides a computer storage medium, where the computer storage medium stores instructions, and when the computer storage medium is run on a computer, causes the computer to execute the foregoing first aspect or any one of the first aspect.
  • an embodiment of the present invention provides a computer program product including instructions.
  • the instructions When the program is executed by a computer, the instructions cause the computer to execute the foregoing first aspect or any possible design of the first aspect.
  • an embodiment of the present invention provides a computer program including instructions.
  • the instructions When the program is executed by a computer, the instructions cause the computer to execute the first aspect or any one of the possible designs of the first aspect.
  • the LTE RLC layer of the UE receives downlink packet data from the LTE access network, and the NR RLC layer of the UE receives downlink packet data from the NR access network;
  • the NR PDCP layer of the UE obtains the ordered first group of data packets, and the NR PDCP layer of the UE does not directly report the ordered first group of data Packet, but after the NR PDCP layer of the UE receives the ordered second set of data packets from the LTERLC layer of the UE, the NR PDCP layer of the UE sends the first set of data packets and the second set of data packets Group of data packets are reordered to obtain a third group of data packets, and then the third group of data packets is sent to a higher layer of the UE, thereby avoiding the first group
  • the two sets of data packets are not in the receiving window, which leads to packet loss, so it is possible to ensure complete reception of the downlink.
  • the reordering function of the UE's LTE RLC layer is turned off, and the reordering function is completed by the UE's NR PDCP layer, thereby avoiding packet loss caused by simultaneous reordering of the NR PDCP layer and the LTE RLC layer. Guarantee complete downlink reception.
  • FIG. 1 is a schematic diagram of an EN-DC network architecture according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a UE-side user plane protocol stack architecture of the EN-DC
  • Figure 3 is a schematic diagram of the user plane protocol stack architecture of the network side of EN-DC;
  • FIG. 4 is a schematic communication diagram of a method for receiving downlink data according to an embodiment of the present invention.
  • FIG. 5A is a schematic diagram of a LTE RLC layer reordering report of a general UE
  • 5B is a schematic diagram of LTE RLC layer reordering reporting of a UE according to an embodiment of the present invention
  • FIG. 5C is a schematic diagram of LTE RLC layer reordering of another UE in general
  • 5D is a schematic diagram of LTE RLC layer reordering reporting of another UE according to an embodiment of the present invention.
  • FIG. 6 is a schematic communication diagram of another method for receiving downlink data according to an embodiment of the present invention.
  • FIG. 7 is a schematic communication diagram of another method for receiving downlink data according to an embodiment of the present invention.
  • FIG. 8 is a schematic communication diagram of another method for receiving downlink data according to an embodiment of the present invention.
  • FIG. 9 is a schematic communication diagram of another method for receiving downlink data according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a possible structure of a UE involved in the foregoing embodiment.
  • FIG. 11 is a schematic structural diagram of another UE according to an embodiment of the present application.
  • FIG. 12 is a schematic diagram of a communication device according to an embodiment of the present application.
  • FIG. 1 is a schematic diagram of an EN-DC network architecture according to an embodiment of the present invention.
  • the UE 101 is simultaneously connected to a base station (Evolved Node B, eNB) 102 of a 4G long term evolution (LTE) access network and a base station (5G Node B, En-gNB) 103 of a 5G NR.
  • eNB 102 is the master node (MN) in EN-DC and is also called MeNB in EN-DC
  • En-gNB103 is the secondary node (SN) in EN-DC. Also called SgNB.
  • the eNB 102 is connected to a mobility management entity (MME) 104 and a serving gateway (SGW) 105 of the 4G core network through the S1-C interface and the S1-U interface, respectively.
  • MME mobility management entity
  • SGW serving gateway
  • En-gNB103 and MME104 of the 4G core network There is no connection between En-gNB103 and MME104 of the 4G core network; whether En-gNB103 is connected to SGW105 of the 4G core network through the S1-U interface depends on which EN-DC protocol stack architecture is used for data transmission.
  • the eNB102 and the En-gNB103 are connected through the X2 port.
  • the UE 101 has a connection with the eNB 102 and a connection with the En-gNB 103, that is, the UE 101 has a dual connection with different access networks.
  • the UE can configure multiple bearer modes.
  • EN-DC cells allocated to the UE and belonging to MeNB and SgNB, respectively, are divided into two groups, and each group is called a cell group.
  • MCG cell group
  • SCG cell group
  • RLC radio link control
  • the radio bearer of PDCP at MeNB is called MN terminated bearer; the radio bearer of PDCP at SgNB is called SN terminated bearer.
  • MN terminated bearer the radio bearer of PDCP at MeNB
  • SN terminated bearer the radio bearer of PDCP at SgNB
  • MCG bearer the radio bearer of PDCP at SgNB
  • SCG bearer the radio bearer of PDCP at SgNB
  • split bearer there are three types of bearers that the UE can perceive, namely MCG bearer, SCG bearer and split bearer.
  • FIG. 2 is a schematic diagram of a UE-side user plane protocol stack architecture of the EN-DC.
  • the PDCP layer uses LTE PDCP or NR PDCP
  • the RLC layer uses LTE RLC
  • the MAC layer uses LTE MAC
  • the EN-DC SCG bearer the PDCP layer uses NR PDPD
  • the RLC layer uses For NR and RLC
  • the MAC layer uses NR and MAC
  • the MAC layer uses LTE MAC and MAC.
  • MCG bearer terminated by MN From the network side, there are six types of bearers: MCG bearer terminated by MN, SCG bearer terminated by MN, split bearer terminated by MN, MCG bearer terminated by SN, SCG bearer terminated by SN, and split bearer terminated by SN.
  • Figure 3 is a schematic diagram of the user plane protocol stack architecture of the network side of EN-DC.
  • the PDCP layer uses LTE PDCP or NR PDCP of MeNB
  • the RLC layer uses LTE MLC of MeNB
  • the MAC layer uses LTE MAC of MeNB
  • EN-DC MN terminated SCG bearer PDCP layer uses MeNB's NR PDCP
  • RLC layer uses NR and RLC of SgNB
  • MAC layer uses SgNB NR and MAC
  • EN-DC MN terminated split bearer PDCP layer uses MeNB's NR PDCP
  • RLC layer uses MeNB LTE RLC and NR RLC of SgNB
  • the MAC layer uses LTE MAC of MeNB and NR MAC of SgNB.
  • the PDCP layer uses NR PDCP of SgNB, the RLC layer uses LTE MLC of MeNB, and the MAC layer uses LTE MAC of MeNB; for SCG bearer terminated by SN of EN-DC, PDCP layer uses SgNB
  • the NR PDCP, the RLC layer uses NR of the SgNB, the MAC layer uses NR of the SgNB, and the NR terminated by the SN of the EN-DC, the PDCP layer uses the NR of the SgNB, the PDCP, and the RLC layer uses the LTE of the MeNB, the RLC of the SgNB, and the NR of the SgNB.
  • RLC, MAC layer uses LTE MAC of MeNB and NR MAC of SgNB.
  • the UE is configured with a split bearer
  • the NR PDCP module of the UE receives data out of order
  • a solution is proposed to reduce the packet loss of data reception on the split bearer.
  • FIG. 4 is a schematic communication diagram of a method for receiving downlink data according to an embodiment of the present invention.
  • This embodiment may be based on the network architecture of the EN-DC shown in FIG. 1 and the protocol stack structure of the UE shown in FIG.
  • the UE mainly involves the NR PDCP layer of the UE (UENR PDCP), the NR RLC layer of the UE (UENR RLC), the LTE RLC layer of the UE (UELTERLC), the NR access network (NR), and the LTE access network (RF LTE for short), the method includes:
  • Step 401 In the split bearer mode of the UE, the LTE RLC layer of the UE receives downlink packet data from the LTE access network, and the NR RLC layer of the UE receives downlink packet data from the NR access network.
  • Step 402 After the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE obtains the first group of data packets that have been sorted;
  • Step 403 After the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE receives the sorted second group of data packets from the LTERLC layer of the UE;
  • Step 404 The NR PDCP layer of the UE reorders the first group of data packets and the second group of data packets to obtain a third group of data packets, and sends the third group of data packets to the UE. High-rise.
  • step 401 when the UE is in the split bearer mode of the EN-DC, the LTE RLC layer of the UE receives downlink packet data from the LTE access network, and the NR RLC layer of the UE receives downlink packet data from the NR access network.
  • the downlink packet data may be processed (for example, reorganized or reordered) and sent to the NR PDCP layer of the UE;
  • the downlink packet data may be processed (for example, reassembled or transparently transmitted) and sent to the NR PDCP layer of the UE.
  • the source of the downlink packet data received by the NR PDCP layer of the UE is the source of the LTE RLC layer of the UE and the NR RLC layer of the UE.
  • the NR PDCP layer of the UE completes the downlink packet data. The reception depends on the cooperation when the LTE RLC layer of the UE and the NR RLC layer of the UE report downlink packet data.
  • step 402 after the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE obtains the first group of data packets that have been sorted.
  • the NR PDCP layer data packet of the UE that is, PDCP protocol data unit (Protocol Data Unit) or RLC service data unit (SDU)
  • sequence number SN
  • t-reordering timer When out-of-order occurs, a reordering timer (t-reordering timer) is started.
  • the NR PDCP layer of the UE expires, the NR PDCP layer of the UE obtains the ordered first group of data packets.
  • the above-mentioned sorted first group of data packets may be the complete sorted first group of data packets.
  • the SN is 1, 2, 3, 4, 5. It may also be the incomplete ordered first group of data packets, for example, the SN is 1, 3, 4, 5, and 7 in sequence, the data packet with SN 2 and the data packet with SN 6 are missing in the middle.
  • step 403 after the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE receives the ordered second group of data packets from the LTE RLC layer of the UE.
  • the LTE RLC layer of the UE is notified, so that the LTE RLC layer of the UE reports the sorted data packet to the NR of the UE. PDCP layer.
  • the NR PDCP layer of the UE sends a first message to the LTE RLC layer of the UE, where the first message It is used to instruct the UE's LTE RLC layer to send ordered data packets to the UE's NR PDCP layer.
  • the UE's LTE RLC layer does not wait for the UE's LTE RLC layer to reorder successfully according to the first message.
  • the reordering timer of the LTE RLC layer of the UE times out and reports the sorted second group of data packets to the NR PDCP layer of the UE.
  • the NR PDCP layer of the UE when the reordering timer of the NR PDCP layer of the UE expires, notifies the LTE RLC layer of the UE so that the LTE RLC layer of the UE does not equal the The UE's LTE RLC layer reordering succeeds or the UE's LTE RLC layer reordering timer expires, and reports the sorted second group of data packets to the UE's NR PDCP layer, thereby ensuring complete downlink reception. While ensuring timeliness.
  • FIG. 5A is a schematic diagram of a LTE RLC layer reordering report of a general UE.
  • the UE has received data packets 2, 3, and 5, but has not received data packets 1, 4.
  • data packets 3 and 4 are data packets that need to be reassembled, and at this time, data packets 2 and 3
  • the sequence of 5 and 5 is unsuccessful, and the reassembly of data package 3 is also unsuccessful.
  • the UE's LTE RLC layer does not report the data packet to the NR PDCP layer; at the second time after the first time, the UE has received data packets 1, 2 , 3, 5 and did not receive data packet 4, among which data packets 3 and 4 are data packets that need to be reorganized. At this moment, data packets 1 and 2 are successfully sorted, and data packet 3 is not successfully reorganized. Generally, the UE's LTE RLC The layer reports successfully sorted data packets 1 and 2 to the NR PDCP layer.
  • sequence numbers of the foregoing data packets are only examples, and data packets 1, 2, 3, 4, and 5 are data packets in a reordering window, and data packet 1 is the data with the smallest sequence number in the reordering window
  • the reordering is successful (also referred to as sorting success), that is, multiple consecutive data packets including the data packet with the smallest sequence number in the reordering window are received. After the reordering is successful, the reordering window will move.
  • FIG. 5B is a schematic diagram of LTE RLC layer reordering reporting of a UE according to an embodiment of the present invention.
  • the UE has received data packets 2, 3, and 5, but has not received data packets 1, 4.
  • data packets 3 and 4 are data packets that need to be reassembled, and at this time, data packets 2 and 3
  • the sequence of 5 and 5 was unsuccessful, and the reassembly of data packet 3 was unsuccessful.
  • the UE although the sequence of data packets was unsuccessful and the reassembly was unsuccessful at this moment, the UE ’s LTE RLC layer received the first message, so the UE The LTE RLC layer reports the ordered data packets 2 and 5 to the NR PDCP layer. It can be understood that, in this case, the previously-sorted second group of data packets are the sorted data packets 2, 5.
  • the sorting success described in this article can also be referred to as reordering success.
  • the sorted data packet may be a number of discontinuous data packets that have been received and sorted before the sorting is unsuccessful.
  • the LTE RLC layer of the UE does not wait for the UE's LTE RLC layer to reorder successfully or the UE's LTE RLC layer's reordering timer expires according to the first message.
  • the NR PDCP layer reports the ordered second set of data packets
  • the UE's LTE RLC layer sends The NR PDCP layer of the UE reports the ordered fourth group of data packets.
  • the LTE RLC layer of the UE reports the ordering to the NR PDCP layer of the UE.
  • the fourth group of data packets can ensure the integrity of the reported data.
  • data packets 3 and 4 are data packets that need to be reassembled.
  • the sequencing of 2, 3, and 5 was unsuccessful, and the reassembly of packet 3 was also unsuccessful, but because the UE's LTE RLC layer received the first message, the UE's LTE RLC layer reported the ordered data packets 2, 5 to the NR PDCP layer. It can be understood that, in this case, the previously-sorted second group of data packets are the sorted data packets 2, 5. Referring to FIG.
  • data packets 3 and 4 are data packets that need to be reassembled. 2
  • the sequencing is successful, and the reassembly of data packet 3 is unsuccessful.
  • the UE's LTE RLC layer reports the successfully sequenced data packets 1 and 2 to the NR PDCP layer after the reordering is successful. It can be understood that in this case, the previously ranked first
  • the four groups of data packets are packets 1 and 2 that are successfully sorted.
  • the NR PDCP layer of the UE reports the fourth group of data packets and the first group of data packets.
  • Two sets of data packets are processed for repeated detection.
  • duplicate data packets in the fourth group of data packets and the second group of data packets may be deleted.
  • the duplicate data packet 2 in both can be deleted.
  • the NR PDCP layer of the UE sends a first message to the LTE RLC layer of the UE, where the first message It is used to instruct the UE's LTE RLC layer to send ordered data packets to the UE's NR PDCP layer.
  • the UE's LTE RLC layer does not wait for the UE's LTE RLC layer reorganization success according to the first message. Report the sorted second group of data packets to the NR PDCP layer of the UE.
  • the NR PDCP layer of the UE when the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE notifies the LTE RLC layer of the UE so that the LTE RLC layer of the UE does not equal the The UE's successful reconfiguration of the LTE RLC layer reports the sorted second group of data packets to the UE's NR PDCP layer, thereby ensuring timeliness while ensuring complete downlink reception.
  • FIG. 5C is a schematic diagram of LTE RLC layer reordering report of another UE in general.
  • the UE has received data packets 2, 3, and 5, but has not received data packets 1, 4.
  • data packets 3 and 4 are data packets that need to be reassembled, and at this time, data packet 2
  • the sequence of 5 and 5 is unsuccessful, and the reassembly of data package 3 is also unsuccessful.
  • the UE's LTE RLC layer does not report the data packet to the NR PDCP layer; at the third time after the first time, the UE has received data packets 2 and 3 , 4, 5, and did not receive data packet 1, of which data packets 3 and 4 are data packets that need to be reorganized. At this moment, the data packets 2 and 5 are not successfully sorted, and data packets 3 and 4 are successfully reorganized.
  • the LTE RLC layer of the UE does not report data packets to the NR PDCP layer. It can be understood that, if the reorganization is successful, all the data packets that need to be reorganized are received.
  • FIG. 5D is a schematic diagram of LTE RLC layer reordering report of another UE according to an embodiment of the present invention. Referring to FIG. 5D, at the first moment, the UE has received data packets 2, 3, and 5, but has not received data packets 1, 4.
  • data packets 3 and 4 are data packets that need to be reassembled, and at this time, data packets 2 and 5
  • the sequencing was unsuccessful, and the reassembly of data packet 3 was unsuccessful, but because the LTE RLC layer of the UE received the foregoing first message for instructing the LTE RLC layer of the UE to send the ordered data packet to the NR PDCP layer of the UE Therefore, the LTE RLC layer of the UE reports the ordered data packets 2 and 5 to the NR PDCP layer.
  • the aforementioned sorted second group of data packets are the sorted data packets 2, 5.
  • the LTE RLC layer of the UE also reports the received data packet 3 that needs to be reassembled to the NR PDCP layer.
  • the LTE RLC layer of the UE does not wait for the reconfiguration of the LTE RLC layer of the UE according to the first message to report the sorted second group of data packets to the NR PDCP layer of the UE.
  • the LTE RLC layer of the UE reports the fourth group of data packets after the reorganization is successful to the NR PDCP layer of the UE.
  • the LTE RLC layer of the UE reports to the NR PDCP layer of the UE a successfully reassembled fourth data packet, which can ensure the integrity of the reported data. .
  • the UE has received data packets 2, 3, 4, and 5 and has not received data packet 1.
  • data packets 3 and 4 are data packets that need to be reorganized, and at this time, data packets 2 and 5 Sorting was unsuccessful, and packets 3 and 4 were reorganized successfully.
  • packet 1 with the lowest sequence number has not been received, there is currently no successfully reordered packet, although packets 3 and 4 are among them.
  • the reorganization is successful, but the UE's LTE RLC layer does not report to the NR.
  • the PDCP layer will report the successfully reordered data packet to the NR only after the packet reordering is successful, or it will report to the NR only after the reordering timer expires.
  • the PDCP layer reports the ordered data packets, so in this case, the UE's LTE RLC layer does not report the data packets to the NR PDCP layer. But different from the usual method, in one embodiment of the present invention, at the first moment, the LTE RLC layer of the UE reports the ordered second set of data packets (data packet 2) to the NR PDCP layer of the UE.
  • the UE's LTE RLC layer will report to the UE
  • the NR PDCP layer reports the fourth group of data packets after the reorganization is successful (the fourth group of data packets is a data packet obtained after reassembly of data packets 3 and 4); optionally, it can also participate in the fourth group of data packets and other
  • the sorted data packets are reported together, for example, the data packet 2, the fourth group of data packets (obtained after reassembly of the data packets 3 and 4), and 5 are reported together. It should be noted that after the reassembly of data packets 3 and 4 is successful, that is, after reassembly into one data packet, it needs to participate in reordering with other data packets (Reorder).
  • the NR PDCP layer of the UE reports the fourth group of data packets and the The second group of data packets is processed for repeated detection.
  • duplicate data packets in the fourth group of data packets and the second group of data packets may be deleted.
  • the fourth group of data packets includes data packets 2, 3, 4, and 5, and the second group of data packets includes 2, 5, duplicate data packets 2 and 5 are deleted after repeated detection processing.
  • the fourth group of data packets includes data packets 3 and 4, and the second group of data packets includes 2, 3, and 5, duplicate data packets 3 in both are deleted after repeated detection processing.
  • the UE's LTE RLC layer reordering timer status is obtained; waiting for the UE's LTE RLC layer reordering timer to expire That is, after the reordering process of the LTE RLC layer of the UE ends, the LTE RLC layer of the UE reports the sorted data packet to the NR PDCP layer of the UE.
  • the status of the LTE RLC layer reordering timer of the UE may be, but is not limited to, duration information of the reordering timer of the LTE RLC layer of the UE. The duration information is used to identify the remaining time length of the reordering timer.
  • the NR PDCP layer of the UE sends a second message to the LTE RLC layer of the UE, where the second message It is used to instruct the LTE RLC layer of the UE to report to the NR PDCP layer of the UE how long the reordering timer of the LTE RLC layer of the UE still has, and how long the timeout expires.
  • the LTE RLC layer of the UE according to the first Two messages report to the UE's NR PDCP layer how long the reordering timer of the UE's LTE RLC layer has time out, and the NR PDCP layer of the UE extends the NR PDCP of the UE according to the time information
  • the duration of the reordering timer of the layer (for example, the extended time length of the NR PDCP layer of the UE is greater than or equal to the time length identified by the time length information), when the reordering of the LTE RLC layer of the UE is successful or the After the reordering timer of the LTE RLC layer of the UE expires, the LTE RLC layer of the UE reports the ordered second group of data packets to the NR PDCP layer of the UE.
  • the delay reporting of the data packet of the NR and PDCP layer can be achieved without changing the reordering process of the LTE and RLC layer.
  • the NR PDCP layer of the UE determines the duration indicated by the duration information
  • the extendable duration of the reordering timer that is less than or equal to the NR PDCP layer of the UE.
  • the extendable duration of the reordering timer of the NR PDCP layer is taken into consideration, so as to avoid impact on services with high timeliness requirements.
  • the NR PDCP layer of the UE may determine an extendable duration of a reordering timer of the NR PDCP layer of the UE according to a type of an upper layer application. It can be understood that, for example, game applications have high requirements on timeliness. Accordingly, the reordering timer of the NR PDCP layer of the UE can be extended; for example, video applications have lower requirements on timeliness. Correspondingly, the extendable duration of the reordering timer of the NR PDCP layer of the UE is larger.
  • the NR PDCP layer of the UE sends a second message to the LTE RLC layer of the UE, where the second message It is used to instruct the LTE RLC layer of the UE to report to the NR PDCP layer of the UE how long the reordering timer of the LTE RLC layer of the UE still has, and how long the timeout expires.
  • the LTE RLC layer of the UE according to the first Two messages report to the UE's NR PDCP layer how long the reordering timer of the UE's LTE RLC layer has timed out.
  • the UE's NR PDCP layer determines that the duration indicated by the duration information is greater than the duration. Extendable duration of the reordering timer of the NR PDCP layer of the UE, the NR PDCP layer of the UE sends a third message to the LTE RLC layer of the UE, the third message is used to indicate the LTE RLC of the UE The layer immediately reports the sorted data packet. The UE's LTE RLC layer does not wait for the UE's LTE RLC layer reordering success or the UE's LTE RLC layer reordering timer to expire according to the third message. The NR PDCP layer of the UE reports the ordered second group of data packets.
  • the extendable duration of the reordering timer of the NR PDCP layer is considered.
  • the LTE RLC layer is notified to report the ordered data immediately.
  • the LTE RLC layer of the UE does not wait for the UE's LTE RLC layer reordering success or the UE's LTE RLC layer reordering timer expires according to the third message.
  • the NR PDCP layer reports the ordered second set of data packets
  • the UE's LTE RLC layer reordering succeeds or the UE's LTE RLC layer reordering timer expires the UE's LTE RLC layer sends
  • the NR PDCP layer of the UE reports the ordered fourth group of data packets.
  • the LTE RLC layer of the UE reports the ordering to the NR PDCP layer of the UE.
  • the fourth group of data packets can ensure the integrity of the reported data.
  • the NR PDCP layer of the UE reports the fourth group of data packets and the first group of data packets.
  • Two sets of data packets are processed for repeated detection.
  • duplicate data packets in the fourth group of data packets and the second group of data packets may be deleted.
  • the UE's LTE RLC layer acknowledgement mode (AM) mode packet reassembly status is obtained; the UE's NR PDCP The layer delay waits for the report of the LTE RLC layer reassembly packet of the UE.
  • AM LTE RLC layer acknowledgement mode
  • the NR PDCP layer of the UE sends a fourth message to the LTE RLC layer of the UE, where the fourth message It is used to instruct the UE's LTE RLC layer to report to the UE's NR PDCP layer the AM mode packet reassembly status of the UE's LTE RLC layer, and the UE's LTE RLC layer to the UE according to the fourth message.
  • the NR PDCP layer of the UE reports the AM mode packet reassembly status of the UE's LTE RLC layer, and the NR PDCP layer of the UE extends the duration of the reordering timer of the NR PDCP layer of the UE according to the reconfiguration status.
  • the LTE RLC layer AM mode data packet of the UE is successfully reorganized
  • the LTE RLC layer of the UE reports the second group of data packets after the reorganization is successful to the NR PDCP layer of the UE.
  • the delay reporting of the data packet of the NR PDCP layer can be achieved without changing the reorganization process of the LTE RLC layer.
  • the NR PDCP layer of the UE before the NR PDCP layer of the UE extends the duration of the reordering timer of the NR PDCP layer of the UE before the NR PDCP layer of the UE determines the The reconfiguration of the AM mode data packet of the UE's LTE RLC layer requires a time less than or equal to the extendable duration of the reordering timer of the UE's NR PDCP layer.
  • the extendable duration of the reordering timer of the NR PDCP layer is taken into consideration, so as to avoid impact on services with high timeliness requirements.
  • the UE's LTE RLC layer AM mode packet reception status (such as the number of missing packets) can also be obtained, so that it can more accurately estimate the time required for the UE's LTE RLC layer AM mode packet reassembly to take time.
  • the NR PDCP layer of the UE sends a fourth message to the LTE RLC layer of the UE, where the fourth message It is used to instruct the UE's LTE RLC layer to report to the UE's NR PDCP layer the AM mode packet reassembly status of the UE's LTE RLC layer, and the UE's LTE RLC layer to the UE according to the fourth message.
  • the NR PDCP layer of the UE reports the AM mode packet reassembly status of the UE's LTE and RLC layer, and the NR PDCP layer of the UE determines the reconfiguration of the AM mode data packet of the LTE and RLC layer of the UE indicated by the reconfiguration status.
  • the time required is longer than the extendable duration of the reordering timer of the NR PDCP layer of the UE, and the NR PDCP layer of the UE sends a fifth message to the LTE RLC layer of the UE, where the fifth message is used to indicate
  • the LTE RLC layer of the UE immediately reports the sorted data packet, and the LTE RLC layer of the UE does not wait for the UE's LTE RLC layer to be successfully restructured according to the fifth message, and reports to the NR PDCP layer of the UE Sorted second group of packets.
  • the extendable duration of the reordering timer of the NR PDCP layer is considered. When the extendable duration of the reordering timer of the NR PDCP layer does not meet the requirements, the LTE RLC layer is notified to report the ordered data immediately.
  • Package solution to avoid impact on services with high timeliness requirements.
  • the LTE RLC layer of the UE does not wait for the reconfiguration of the LTE RLC layer of the UE according to the fifth message to report the sorted second set of data packets to the NR PDCP layer of the UE.
  • the LTE RLC layer of the UE reports the fourth group of data packets after the reorganization is successful to the NR PDCP layer of the UE.
  • the LTE RLC layer of the UE reports to the NR PDCP layer of the UE a successfully reassembled fourth data packet, which can ensure the integrity of the reported data. .
  • the NR PDCP layer of the UE reports the fourth group of data packets and the The second group of data packets is processed for repeated detection.
  • duplicate data packets in the fourth group of data packets and the second group of data packets may be deleted.
  • the NR PDCP layer of the UE reorders the first group of data packets and the second group of data packets to obtain a third group of data packets, and sends the third group of data packets to the High level of UE.
  • the NR PDCP layer of the UE may first perform repeated detection processing on the first group of data packets and the second group of data packets, and delete the first group of data packets and the second group of data Duplicate packets in the packet; then the NR PDCP layer of the UE reorders the first group of packets and the second group of packets after repeated detection processing to obtain a third group of packets, and The third group of data packets is sent to a higher layer of the UE.
  • duplicate data packets in the first group of data packets and the second group of data packets may be deleted.
  • the LTE RLC layer of the UE receives downlink packet data from the LTE access network, and the NR RLC layer of the UE receives downlink packet data from the NR access network;
  • the NR PDCP layer of the UE obtains the ordered first group of data packets, and the NR PDCP layer of the UE does not directly report the ordered first group of data Packet, but after the NR PDCP layer of the UE receives the ordered second set of data packets from the LTERLC layer of the UE, the NR PDCP layer of the UE sends the first set of data packets and the second set of data packets Group data packets are reordered to obtain a third group of data packets, and then send the third group of data packets to the upper layer of the UE, so as to prevent the NR PDCP
  • the role of the first message mentioned in the foregoing embodiments may also be understood as an indication that the reordering timer of the NR PDCP layer of the UE times out.
  • the following describes the method for receiving downlink data provided in the embodiment of the present invention by combining different scenarios.
  • a data radio bearer (DRB) of the UE is configured as a split bearer by the network, and the UE receives downlink data of the DRB on both MeNB and SgNB paths.
  • DRB data radio bearer
  • NR PDCP reordered and the reordering timer expired.
  • LTE RLC started the reordering timer and waited for the timer to expire or the reordering successfully reported the data packet, causing some data packets not to be transmitted to the NR PDCP layer in time .
  • NR PDCP reports the data packet to the application's data processing module after reordering, and adjusts the receiving sliding window.
  • the LTERLC reordered data packet reaches NR PDCP, the PDCP sequence number of the data packet is not in the sliding window receiving range, and NR PDCP discards the data packet, resulting in packet loss.
  • FIG. 6 is a schematic communication diagram of another method for receiving downlink data according to an embodiment of the present invention.
  • This embodiment may execute the main body based on the network architecture of the EN-DC shown in FIG. 1 and the protocol stack structure of the UE shown in FIG. 2.
  • the UE mainly involves the NR PDCP layer of the UE (referred to as UE NR PDCP), the NR RLC layer of the UE (referred to as UE NR and RLC), the LTE RLC layer of the UE (referred to as UE LTERLC), the NR access network (referred to as NR), and LTE Access network (referred to as LTE for short).
  • the LTE RLC layer is notified, the LTE RLC layer is being reordered, and the LTE RLC layer report has been sorted.
  • the data packet is given to PDCP.
  • the NR PDCP reorders the data is sent to the data processing module of the application.
  • the method includes:
  • Step 601 The NR network sends a data packet to the terminal. After receiving the data packet, the NR and RLC layers of the terminal perform operations such as reassembly and transparent transmission.
  • Step 602 The NR RLC reports the data packet to the NR PDCP layer.
  • the NRPDCP layer of the terminal receives the data packet uploaded by the NR RLC layer of the terminal or the LTE RLC layer of the terminal, performs operations such as reordering and duplicate detection, and reports the data packet to the upper layer of the UE (for example, an application data processing module).
  • Step 603 The NR PDCP layer of the terminal finds that the received data packets are out of order, the PDCP sequence number is abnormal, and starts a reordering timer (ie, a T-reordering timer). In the receiving window, reorder the received data packets.
  • a reordering timer ie, a T-reordering timer
  • step 604 after receiving the network data packet, the LTE RLC finds that the data packet is out of order. You need to reorder the data packets, start the reordering timer, and wait for subsequent data packets to be sorted.
  • Step 605 The reordering timer of the NR PDCP layer expires, and the NR PDCP layer notifies the LTE RLC to upload the sorted data packet.
  • the reordering timer of the LTE RLC has run for a period of time, and this period of time can be recorded as T-reordering_1.
  • LTE RLC keeps the original reordering process unchanged.
  • Step 606 The LTE RLC layer transmits the sequenced data packets to the NR PDCP layer. At the same time, the reordering timer continues to run, and the reordering continues.
  • the NR PDCP reorders the data packets received from the LTERLC and NR RLC layers and sends them to the data processing module on the application side.
  • Step 608 the LTE RLC layer receives the network-side data packet, and the reordering is successful.
  • the LTE RLC forms a complete and ordered data packet and sends it to the NR PDCP.
  • the LTE RLC reordering timer expires, and the LTE RLC sends the sorted data packet.
  • the duration of the LTE RLC reordering timer can be recorded as T-reordering_1 plus T-reordering_2.
  • step 609 the reordered data packets buffered by the LTE RLC are uploaded to the NR PDCP, and the NR PDCP performs repeated detection processing, discards the processed data packets, and reports the data packets to the data processing module of the application.
  • the UE performs reordering in NR PDCP, LTE and RLC perform reordering at the same time, the NR PDCP reordering timer expires, and notifies LTE that the RLC reports the ordered data packets, and the NR PDCP reports the ordered data packets in the receiving window.
  • the NRPDCP reordering timer expires, packet loss caused by LTE RLC reordering is reduced.
  • FIG. 7 is a schematic communication diagram of another method for receiving downlink data according to an embodiment of the present invention.
  • This embodiment may execute the main body based on the network architecture of the EN-DC shown in FIG. 1 and the protocol stack structure of the UE shown in FIG. 2.
  • the UE mainly involves the NR and PDCP layers of the UE (referred to as UE NR and PDCP), the NR and RLC layers of the UE (referred to as UE NR and RLC), the LTE and RLC layers of the UE (referred to as UE LTERLC), the NR access network (referred to as NR), and LTE Access network (referred to as LTE for short), in this embodiment, under the bearer of EN-DC Split, when the NR PDCP reordering timer expires, the status of the RLC layer reordering timer of LTE is obtained; NR PDCP waits for the RLC reordering timer to expire, The reordering process ends, and the RLC reports the ordered
  • Step 701 The NR network sends a data packet to the terminal. After receiving the data packet, the NR and RLC layers of the terminal perform operations such as reassembly and transparent transmission.
  • Step 702 The NR RLC layer of the terminal reports the data packet to the NR PDCP layer of the terminal.
  • the NRPDCP layer of the terminal receives the data packets uploaded by the NR RLC layer of the terminal or the LTE RLC layer of the terminal, performs operations such as reordering and duplicate detection, and reports the data packets to the data processing module of the application.
  • step 703 the NR PDCP finds that the received data packet is out of order, the SN sequence number is abnormal, starts a reordering timer, and reorders the received data packet in the receiving window.
  • Step 704 After receiving the network data packet, the LTE RLC finds that the data packet is out of order. You need to reorder the data packets, start the reordering timer, and wait for subsequent data packets to be sorted.
  • Step 705 The NR PDCP reordering timer expires, and the NR PDCP layer notifies the LTE RLC to report the current state of the RLC.
  • Step 706 The NR PDCP obtains the length of the current LTE RLC timer for evaluation, and extends the reordering timer. If the length that the timer can be extended is shorter than the time that the RLC reordering timer continues to run, a solution similar to the embodiment shown in FIG. 6 can be adopted next, that is, steps 605-609 in FIG. 6 can be performed next; otherwise, If the length of the timer that can be extended is greater than or equal to the duration that the LTERLC layer reordering timer continues to run, wait for the LTE RLC to perform the reordering result.
  • the LTE RLC layer of the UE receives the data packet on the network side, and the reordering is successful, or the reordering timer of the LTE RLC layer of the UE expires, and the LTERLC layer of the UE forms an ordered data packet and sends it to the NR PDCP.
  • step 708 the reordered data packets buffered by the UE's LTE RLC are uploaded to the UE's NR PDCP layer.
  • step 709 the NR PDCP layer of the UE performs reordering and duplicate detection processing, and reports the reordered data packet to the data processing module of the application.
  • the UE performs reordering in NR PDCP, LTE and RLC perform reordering simultaneously, NR PDCP reordering timer expires, notifies LTE that RLC reports reordering status, and NR PDCP delays waiting for LTE and RLC to report sorting packets. Upload the reordered packets received from NRRLC and LTERLC. In the process of transmitting data through EN-DC, when the NRPDCP reordering timer expires, packet loss caused by LTE RLC reordering is reduced.
  • the UE turns off the LTE RLC reordering function of the UE, and the LTE RLC of the UE reassembles and transparently transmits data packets to the NR PDCP.
  • the NR PDCP of the UE reorders the data received from the NR RLC of the UE and the LTE RLC of the UE.
  • the NR PDCP of the UE reports the sorted data packet to the upper layer of the UE (for example, an application-side data processing module) .
  • the reordering function of the LTE RLC layer of the UE is pre-configured to be turned off. This method is simple and easy to implement.
  • the reordering function of the LTE RLC layer of the UE is turned off.
  • This method can avoid reordering of the NR PDCP layer and the LTE RLC layer at the same time, but does not affect the reordering of the LTE RLC layer when the NR PDCP layer is not reordered, which can improve data processing efficiency.
  • the UE receives a Radio Resource Control (RRC) message; and according to the RRC message, disables the reordering function of the UE's LTE RLC layer.
  • RRC Radio Resource Control
  • This method can improve the control of the UE on the network side, and the network side can flexibly control the reordering function of the UE's LTE RLC layer to be turned off according to the resource scheduling situation.
  • the LTE RLC reordering function is turned off, and the NR PDCP reorders the data received from the NR RLC and the LTE RLC.
  • the NRPDCP reordering timer expires, packet loss caused by LTE RLC reordering is reduced.
  • a DRB of the UE is configured as a split bearer by the network, and the UE receives downlink data of the DRB on both MeNB and SgNB paths at the same time.
  • NR PDCP reordered and the reordering timer expired; at the same time, LTE RLC reorganized the process, which caused some data packets not to be transmitted to the NR PDCP layer in time.
  • NR PDCP reports the data packet to the application's data processing module after reordering, and adjusts the receiving sliding window.
  • the LTERLC reassembled data packet arrives at NR PDCP, the PDCP sequence number of the datagram is not in the sliding window reception range.
  • NR PDCP discards the data packet, resulting in packet loss.
  • FIG. 8 is a schematic communication diagram of another method for receiving downlink data according to an embodiment of the present invention.
  • This embodiment may execute the main body based on the network architecture of the EN-DC shown in FIG. 1 and the protocol stack structure of the UE shown in FIG. 2.
  • the UE mainly involves the NR and PDCP layers of the UE (referred to as UE NR and PDCP), the NR and RLC layers of the UE (referred to as UE NR and RLC), the LTE and RLC layers of the UE (referred to as UE LTERLC), the NR access network (referred to as NR), and LTE Access network (referred to as LTE for short).
  • the LTE RLC layer is notified.
  • the LTE RLC layer is being reorganized, and the LTE RLC layer reports the sorted data packets.
  • the method includes:
  • Step 801 The NR network sends a data packet to the terminal. After receiving the data packet, the NR and RLC layers of the terminal perform operations such as reassembly and transparent transmission.
  • Step 802 The NR RLC reports the data packet to the NR PDCP layer.
  • the NRPDCP layer of the terminal receives the data packet uploaded by the NR RLC layer of the terminal or the LTE RLC layer of the terminal, performs operations such as reordering and duplicate detection, and reports the data packet to the upper layer of the UE (for example, an application data processing module).
  • Step 803 The NR PDCP layer of the terminal finds that the received data packet is out of order, the PDCP sequence number is abnormal, and starts a reordering timer (ie, a T-reordering timer). In the receiving window, the received data packet is reordered.
  • a reordering timer ie, a T-reordering timer
  • Step 804 After receiving the network data packet, the LTE RLC finds that the data packet needs to be reorganized, and waits for subsequent data packets to be reorganized.
  • step 805 the reordering timer of the NR PDCP layer expires, and the NR PDCP layer notifies the LTE RLC to upload the sorted data packet.
  • LTE RLC received the notification, the reorganization of LTE RLC had been in progress for a period of time, which could be recorded as T1.
  • LTE RLC kept the original reorganization process unchanged.
  • Step 806 The LTE RLC layer transmits the ordered data packets to the NR PDCP layer. Restructuring continues.
  • the NR PDCP reorders the data packets received from the LTERLC and NR RLC layers and sends them to the data processing module on the application side.
  • the LTE RLC layer receives the network-side data packet, and the reorganization is successful.
  • the time required for the entire reorganization process can be recorded as T1 + T2.
  • the LTE RLC constitutes a complete and ordered data packet and sends it to the NR PDCP.
  • step 809 the data packets after the reorganization of the LTE RLC cache are successfully uploaded to the NR PDCP, and the NR PDCP performs repeated detection processing, discards the processed data packets, and reports the data packets to the application data processing module.
  • the UE performs reordering in NR PDCP, LTE and RLC reorganize at the same time, the NR PDCP reordering timer expires, and notifies LTE that the RLC reports the ordered data packets, and that the NR PDCP reports the ordered data packets in the receiving window.
  • the NRPDCP reordering timer expires, packet loss caused by LTE RLC reorganization is reduced.
  • FIG. 9 is a schematic communication diagram of another method for receiving downlink data according to an embodiment of the present invention.
  • This embodiment may execute the main body based on the network architecture of the EN-DC shown in FIG. 1 and the protocol stack structure of the UE shown in FIG. 2.
  • the UE mainly involves the NR and PDCP layers of the UE (referred to as UE NR and PDCP), the NR and RLC layers of the UE (referred to as UE NR and RLC), the LTE and RLC layers of the UE (referred to as UE LTERLC), the NR access network (referred to as NR), and LTE Access network (referred to as LTE for short).
  • NR PDCP under the bearer of EN-DC Split, when the NR PDCP reordering timer expires, the LTE RLC layer packet reassembly status is obtained; NR PDCP waits for the LTE after the RLC reports the reassembly success. Data packets (may be referred to as reassembly data packets). After the NR PDCP reordering timer expires, or after LTERLC reports the successfully reassembled data packet, NR PDCP sends the data to the upper layer.
  • the method includes:
  • Step 901 the NR network sends a data packet to the terminal, and the NR and RLC layers of the terminal perform operations such as reassembly and transparent transmission after receiving the data packet.
  • Step 902 The NR RLC reports the data packet to the NR PDCP layer.
  • the NRPDCP layer of the terminal receives the data packets uploaded by the NR RLC layer of the terminal or the LTE RLC layer of the terminal, performs operations such as reordering and duplicate detection, and reports the data packets to the data processing module of the application.
  • step 903 the NR PDCP finds that the received data packet is out of order, the SN sequence number is abnormal, starts a reordering timer, and reorders the received data packet in the receiving window.
  • step 904 after receiving the network data packet, the LTE RLC finds that the data packet needs to be reorganized, and waits for subsequent data packets to be reorganized.
  • step 905 the NR PDCP reordering timer expires, and the NR PDCP layer notifies the LTE RLC to report the current RLC AM mode packet reassembly status.
  • the LTE RLC reassembly time can be recorded as T1.
  • the NR PDCP obtains the current AM mode packet reassembly status of the LTE RLC for evaluation, and extends the reordering timer. If the time length that the timer can be extended is less than the time that the RLC reorganization continues, then a solution similar to the embodiment shown in FIG. 8 can be adopted next, that is, steps 805-809 in FIG. 8 can be performed next; otherwise, if the timing The length of time that the router can extend is greater than or equal to the length of the restructuring of the LTERLC layer, and then wait for the reconfiguration results of LTE and RLC.
  • step 907 the LTE RLC layer of the UE receives the data packet on the network side, and the reassembly is successful.
  • the entire reassembly time of the LTE RLC can be recorded as T1 + T2, and the LTERLC layer of the UE sends the successfully reassembled data packet to the NR PDCP.
  • step 908 the reassembled data packets of the UE's LTE RLC cache are successfully uploaded to the UE's NR PDCP layer.
  • step 909 the NR PDCP layer of the UE performs reordering and repeated detection processing, and reports the reordered data packet to the data processing module of the application.
  • the UE performs reordering on NR PDCP, and LTE RLC reorganizes simultaneously.
  • the NR PDCP reordering timer expires, notifies LTE that RLC reports the reorganization status, and NR PDCP delays waiting for LTE RLC to report the recombination packet before uploading the NR RLC and LTE RLC received data packets.
  • packet loss caused by LTE RLC reorganization is reduced.
  • each network element such as a UE
  • each network element includes a hardware structure and / or a software module corresponding to each function.
  • the present invention can be implemented in the form of hardware or a combination of hardware and computer software by combining the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is performed by hardware or computer software-driven hardware depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of the modules in the embodiment of the present invention is schematic, and is only a logical function division. In actual implementation, there may be another division manner.
  • FIG. 10 shows a schematic diagram of a possible structure of a UE involved in the foregoing embodiment.
  • UE1000 includes a processing module 1002, a first communication module 1003, and a second communication module 1004.
  • the processing module 1002 is used to control and manage the actions of the UE.
  • the processing module 1002 is used to support the UE to perform the processes in FIG. 4 to FIG. 9 and / or other processes for the technology described herein.
  • the first communication module 1003 is configured to support communication between the UE and other network entities using 4G technology, such as communication with a base station.
  • the second communication module 1004 is configured to support communication between the UE and other network entities using 5G technology, for example, communication with a base station.
  • the terminal may further include a storage module 1001 for storing program code and data of the UE.
  • the first communication module 1003 is configured to receive downlink packet data from the LTE access network of the UE through the first communication module 1003 in the split bearer mode of the EN-DC. ;
  • a second communication module 1004 used by the NR and RLC layer of the UE to receive downlink packet data from the NR access network through the second communication module 1004;
  • the processing module 1002 is configured to control the NRPDCP layer of the UE and the LTERLC layer of the UE to perform the following operations: After the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE gets The ordered first group of data packets; and when the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE receives the ordered second group of data from the LTE RLC layer of the UE Packet; the NR PDCP layer of the UE reorders the first group of data packets and the second group of data packets to obtain a third group of data packets, and sends the third group of data packets to a higher layer of the UE .
  • the processing module 1002 is configured to control the NR PDCP layer of the UE to receive the sorted second from the LTE RLC layer of the UE after a reordering timer of the NR PDCP layer of the UE expires.
  • a group data packet includes: the processing module 902 is configured to control the NR PDCP layer of the UE to send a first message to the LTE RLC layer of the UE when a reordering timer of the NR PDCP layer of the UE expires,
  • the first message is used to instruct the LTE RLC layer of the UE to send ordered data packets to the NR PDCP layer of the UE, and control the LTE RLC layer of the UE to not wait for the UE according to the first message. If the reordering of the LTE RLC layer is successful or the reordering timer of the LTE RLC layer of the UE expires, the ordered second group of data packets is reported to the NR PDCP layer of the UE.
  • the processing module 1002 is further configured to perform the reordering of the LTE RLC layer of the UE or the reordering of the LTE RLC layer of the UE at the LTE RLC layer of the UE according to the first message.
  • the sequenced second group of data packets is reported to the NR PDCP layer of the UE, and after the UE's LTE RLC layer reordering succeeds or the UE's LTE RLC layer reordering timer expires,
  • the LTE RLC layer that controls the UE reports the ordered fourth group of data packets to the NR PDCP layer of the UE.
  • the processing module 1002 is further configured to control the NR PDCP layer of the UE to report to the NR PDCP layer of the UE a sorted fourth group of data packets after the LTE RLC layer of the UE reports the ordered fourth group of data packets to the NR PDCP layer of the UE.
  • the fourth group of data packets and the second group of data packets are subjected to repeated detection processing.
  • the processing module 1002 is configured to control the NR PDCP layer of the UE to receive the sorted number from the LTE RLC layer of the UE after a reordering timer of the NR PDCP layer of the UE expires.
  • Two sets of data packets include: the processing module 902 is configured to control the NR PDCP layer of the UE to send a first message to the LTE RLC layer of the UE when a reordering timer of the NR PDCP layer of the UE expires
  • the first message is used to instruct the UE's LTE RLC layer to send ordered data packets to the UE's NR PDCP layer, to control the UE's LTE RLC layer to not wait for the UE according to the first message
  • the successful reconfiguration of the LTE RLC layer reports the ordered second group of data packets to the NR PDCP layer of the UE.
  • the processing module 1002 is further configured to report the sequence to the NR PDCP layer of the UE at the LTE RLC layer of the UE according to the first message, and wait for the LTE RLC layer of the UE to be successfully reorganized. After the second group of data packets of the UE, when the LTE RLC layer of the UE is successfully reorganized, the LTE RLC layer that controls the UE reports the fourth group of data packets after the reorganization is successful to the NR PDCP layer of the UE.
  • the processing module 1002 is further configured to control the NR PDCP layer pair of the UE after the LTE PDC layer of the UE reports the successfully reassembled fourth packet to the NR PDCP layer of the UE. Repeated detection processing is performed on the fourth group of data packets and the second group of data packets.
  • the processing module 1002 is configured to control the NR PDCP layer of the UE to receive the sorted number from the LTE RLC layer of the UE after a reordering timer of the NR PDCP layer of the UE expires.
  • Two sets of data packets include: the processing module 1002 is configured to control the NR PDCP layer of the UE to send a second message to the LTE RLC layer of the UE after a reordering timer of the NR PDCP layer of the UE expires
  • the second message is used to instruct the LTE RLC layer of the UE to report to the NR PDCP layer of the UE how long the reordering timer of the LTE RLC layer of the UE has and how long the timeout period expires to control the UE ’s
  • the LTE RLC layer reports to the UE's NR PDCP layer according to the second message, how long the reordering timer of the UE's LTE RLC layer has timeout duration information, and controls the UE's NR PDCP layer according to the duration
  • the information extends the duration of the reordering timer of the NR and PDCP layers of the UE, and controls the LTE of the UE after the re
  • the processing module 1002 is further configured to control the NR PDCP of the UE before the NR PDCP layer of the UE extends the duration of the reordering timer of the NR PDCP layer of the UE according to the duration information.
  • the layer determines that the duration indicated by the duration information is less than or equal to the extendable duration of the reordering timer of the NR PDCP layer of the UE.
  • the processing module 1002 is configured to control the NR PDCP layer of the UE to receive the sorted number from the LTE RLC layer of the UE after a reordering timer of the NR PDCP layer of the UE expires.
  • Two sets of data packets include: the processing module 1002 is configured to control the NR PDCP layer of the UE to send a second message to the LTE RLC layer of the UE after a reordering timer of the NR PDCP layer of the UE expires
  • the second message is used to instruct the LTE RLC layer of the UE to report to the NR PDCP layer of the UE how long the reordering timer of the LTE RLC layer of the UE has and how long the timeout period expires to control the UE ’s
  • the LTE RLC layer reports to the UE's NR PDCP layer according to the second message, how long the reordering timer of the UE's LTE RLC layer has time out, and controls the UE's NR PDCP layer to determine the duration.
  • the time indicated by the information is greater than the extendable time of the reordering timer of the NR and PDCP layer of the UE.
  • the NR and PDCP layer of the UE sends a third message to the LTE and RLC layer of the UE.
  • the LTE RLC layer instructing the UE to immediately report the sorted data packet, Controlling the LTE RLC layer of the UE to report to the UE's NR PDCP layer not to wait for the UE's LTE RLC layer reordering success or the UE's LTE RLC layer reordering timer to expire according to the third message Sorted second group of packets.
  • the processing module 1002 is further configured to perform LTE RLC layer reordering success on the UE's LTE RLC layer or the UE's LTE RLC layer reordering based on the third message.
  • the sequenced second group of data packets is reported to the NR PDCP layer of the UE, and after the UE's LTE RLC layer reordering succeeds or the UE's LTE RLC layer reordering timer expires,
  • the LTE RLC layer that controls the UE reports the ordered fourth group of data packets to the NR PDCP layer of the UE.
  • the processing module 1002 is configured to control the NR PDCP layer of the UE to receive the sorted number from the LTE RLC layer of the UE after a reordering timer of the NR PDCP layer of the UE expires.
  • Two sets of data packets include: the processing module 1002 is configured to control the UE's NR PDCP layer to send a fourth message to the UE's LTE RLC layer when the reordering timer of the NR PDCP layer of the UE expires
  • the fourth message is used to instruct the UE's LTE RLC layer to report to the UE's NR PDCP layer to confirm the AM mode packet reassembly status of the UE's LTE RLC layer, and control the UE's LTE RLC layer according to
  • the fourth message reports to the UE's NR PDCP layer the AM mode packet reassembly status of the UE's LTE RLC layer, and controls the UE's NR PDCP layer to extend the UE's NR PDCP layer according to the reconfiguration status.
  • the UE's LTE RLC layer is controlled to report to the UE's NR PDCP layer the successfully reassembled second group of data packets .
  • the processing module 1002 is further configured to control the NR and PDCP of the UE before extending the duration of the reordering timer of the NR and PDCP layer of the UE according to the reorganization status.
  • the layer determines that the reconfiguration of the AM mode data packet of the LTE RLC layer of the UE indicated by the reassembly status requires a time less than or equal to the extendable duration of the reordering timer of the NR PDCP layer of the UE.
  • the processing module 1002 is configured to control the NR PDCP layer of the UE to receive the sorted number from the LTE RLC layer of the UE after a reordering timer of the NR PDCP layer of the UE expires.
  • Two sets of data packets include: the processing module 1002 is configured to control the UE's NR PDCP layer to send a fourth message to the UE's LTE RLC layer when the reordering timer of the NR PDCP layer of the UE expires
  • the fourth message is used to instruct the UE's LTE RLC layer to report to the UE's NR PDCP layer to confirm the AM mode packet reassembly status of the UE's LTE RLC layer, and control the UE's LTE RLC layer according to
  • the fourth message reports the UE's LTE and RLC layer AM mode packet reassembly status to the UE's NR PDCP layer, and controls the UE's NR PDCP layer to determine the UE's LTE indicated by the reassembly status
  • the reconfiguration of the AM mode data packet at the RLC layer needs more time than the extendable duration of the reordering timer of the NR and PDCP layer of
  • the NR and PDCP layer of the UE sends a fifth message to the LTE and RLC layer of the UE.
  • the fifth message is used to indicate that the LTE RLC layer of the UE immediately reports The data packet sequence, to control LTE RLC layer of the UE LTE RLC layer recombinant unequal success to the UE reports the second ordered group of data packets to the NR PDCP layer of the UE according to the fifth message.
  • the processing module 1002 is further configured to report the sequence to the NR PDCP layer of the UE at the LTE RLC layer of the UE according to the fifth message without waiting for the LTE RLC layer of the UE to be successfully reorganized.
  • the LTE RLC layer that controls the UE reports the fourth group of data packets after the reorganization is successful to the NR PDCP layer of the UE.
  • the processing module 1002 is further configured to control the NR PDCP layer of the UE to the fourth group after the LTE RLC layer of the UE reports the fourth group of data packets to the NR PDCP layer of the UE.
  • the group data packet and the second group data packet are subjected to repeated detection processing.
  • the processing module 1002 is configured to control the NR PDCP layer of the UE to reorder the first group of data packets and the second group of data packets to obtain a third group of data packets, and
  • the group data packet is sent to the upper layer of the UE and includes: the processing module 1002 is used to control the NR PDCP layer of the UE to perform repeated detection processing on the first group data packet and the second group data packet, and delete Duplicate data packets among the first group of data packets and the second group of data packets; controlling the NR PDCP layer of the UE to process the first group of data packets and the second group of data after repeated detection processing The packets are reordered to obtain a third group of data packets, and the third group of data packets are sent to an upper layer of the UE.
  • the processing module 1002 is used for the UE in the split bearer mode of EN-DC, the LTE RLC layer of the UE receives downlink packet data from the LTE access network through the first communication module 1003, and the NR RLC of the UE The layer receives downlink packet data from the NR access network through the second communication module 1004; after the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE obtains the first group of data packets that have been sorted, The NR PDCP layer of the UE does not directly report the ordered first group of data packets, but after the NR PDCP layer of the UE receives the ordered second group of data packets from the LTERLC layer of the UE, the UE The NR PDCP layer reorders the first group of data packets and the second group of data packets to obtain a third group of data packets, and then sends the third group of data packets to the upper layer of
  • the first communication module 1003 is configured to receive the LTE RLC layer of the UE from the LTE access network through the first communication module 1003 in an EN-DC split bearer mode. Downlink packet data;
  • the second communication module 1004 used by the NR and RLC layer of the UE to receive downlink packet data from the NR access network through the second communication module 1004;
  • the processing module 1002 is configured to control the reordering function of the LTE RLC layer of the UE to be turned off, and the reordering function is performed by the NRPDCP layer of the UE.
  • the processing module 1002 is used to control the reordering function of the LTE RLC layer of the UE to be turned off, and includes: the processing module 1002 is configured to pre-configure the reordering function of the LTE RLC layer of the UE to be turned off.
  • the processing module 1002 is configured to control the reordering function of the UE's LTE RLC layer to be turned off, including: the processing module 1002 is configured to enable a reordering timer of the UE's NR PDCP layer , Turning off the reordering function of the LTE RLC layer of the UE.
  • the first communication module 1003 or the second communication module 1004 is further configured to receive an RRC message
  • the processing module 1002 is configured to control the reordering function of the LTE RLC layer of the UE to be turned off, and includes: the processing module 1002 is configured to disable the reordering function of the LTE RLC layer of the UE according to the RRC message.
  • first communication module 1003 is used to implement the 4G communication function
  • second communication module 1004 is used to implement the 5G communication function.
  • the processing module 1002 is used to control the reordering function of the UE's LTE RLC layer to be turned off, and the reordering function is completed by the UE's NR PDCP layer, thereby avoiding that the NR PDCP layer and the LTE RLC layer are rescheduled simultaneously.
  • the packet loss caused by the sequencing can ensure the complete reception of the downlink.
  • the processing module 1002 may be a processor or a controller.
  • the first communication module 1003 and the second communication module 1004 may be a communication interface, a transceiver, a transceiver circuit, and the like.
  • the communication interface is collectively referred to and may include one or more interfaces.
  • the storage module 1001 may be a memory.
  • FIG. 11 is a schematic structural diagram of a UE according to an embodiment of the present application. Taking the UE as a mobile phone as an example, FIG. 11 is a block diagram showing a partial structure of a mobile phone 1100 related to an embodiment of the present invention.
  • the mobile phone 1100 includes: a radio frequency (RF) circuit 1110, a radio frequency circuit 1111, a memory 1120, an input unit 1130, a display screen 1140, a sensor 1150, an audio circuit 1160, and a WiFi (wireless fidelity) module 1170, processor 1180, and power supply 1190.
  • RF radio frequency
  • the structure of the mobile phone shown in FIG. 11 does not constitute a limitation on the mobile phone, and may include more or fewer parts than those shown in the figure, or combine certain parts, or arrange different parts.
  • the UE may have two RF circuits to support different communication modes, for example, the RF circuit 1110 in the figure is used to support the 4G communication mode, that is, receiving 4G signals, RF Circuit 1111 is used to support 5G communication mode, that is, to receive 5G signals.
  • the RF circuit 1110 and the RF circuit 1111 may be used for receiving and transmitting signals during information transmission and reception or during a call.
  • the downlink information of the base station is received and processed by the processor 1180.
  • the uplink data of the design is transmitted to the base station.
  • the RF circuit includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like.
  • the RF circuit 1110 and the RF circuit 1111 can also communicate with a network and other devices through wireless communication.
  • the wireless communication may use any communication standard or protocol, including, but not limited to, Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), and Code Division Multiple Access (Code) Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, Long Term Evolution (LTE) system, email, Short Message Service (SMS), etc.
  • GSM Global System for Mobile Communications
  • GPRS General Packet Radio Service
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • SMS Short Message Service
  • the memory 1120 can be used to store software programs and modules.
  • the processor 1180 executes various functional applications and data processing of the mobile phone 1100 by running the software programs and modules stored in the memory 1120.
  • the memory 1120 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playback function, an image playback function, etc.), etc .; the storage data area may store Data (such as audio data, phone book, etc.) created according to the use of the mobile phone 1100.
  • the memory 1120 may include volatile memory, such as nonvolatile dynamic random access memory (NVRAM), phase change random access memory (Phase, Change RAM, PRAM), magnetoresistive random access memory (Magetoresistive RAM, MRAM), etc .; the memory 1120 may also include non-volatile memory, such as at least one disk storage device, electronically erasable programmable read-only memory (EEPROM), flash memory device, For example, NOR flash memory or NAND flash memory, semiconductor devices, such as solid state drives (Solid State Disk, SSD), etc.
  • EEPROM electronically erasable programmable read-only memory
  • flash memory device For example, NOR flash memory or NAND flash memory, semiconductor devices, such as solid state drives (Solid State Disk, SSD), etc.
  • the memory 1120 may further include a combination of the aforementioned types of memories.
  • the input unit 1130 may be used to receive inputted numeric or character information, and generate key signal inputs related to user settings and function control of the mobile phone 1100.
  • the input unit 1130 may include a touch panel 1131 and other input devices 1132.
  • the touch panel 1131 also known as a touch screen, can collect user's touch operations on or near it (such as the user using a finger, stylus, etc. any suitable object or accessory on the touch panel 1131 or near the touch panel 1131 Operation), and drive the corresponding connection device according to a preset program.
  • the touch panel 1131 may include a touch detection device and a touch controller.
  • the touch detection device detects the user's touch position, and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into contact coordinates, and sends it It is given to the processor 1180, and can receive commands from the processor 1180 and execute them.
  • the input unit 1130 may implement a touch panel 1131 using various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave.
  • the input unit 1130 may further include other input devices 1132.
  • the other input devices 1132 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.
  • the display screen 1140 may be used to display information input by the user or information provided to the user and various menus of the mobile phone 1100.
  • the display panel 1140 may include a display panel 1141.
  • the display panel 1141 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.
  • the touch panel 1131 may cover the display panel 1141. After the touch panel 1131 detects a touch operation on or near the touch panel 1131, the touch panel 1131 transmits the touch operation to the processor 1180 to determine the type of the touch event. The type provides corresponding visual output on the display panel 1141.
  • the touch panel 1131 and the display panel 1141 are implemented as two independent components to implement the input and input functions of the mobile phone 1100, in some embodiments, the touch panel 1131 and the display panel 1141 can be integrated. And realize the input and output functions of the mobile phone 1100.
  • the display screen 1140 may be used to display content, and the content includes a user interface, such as a startup interface of a terminal, and a user interface of an application. The content can include information and data in addition to the user interface.
  • the display screen 1140 may be a built-in screen of the terminal or other external display devices.
  • the mobile phone 1100 may further include at least one sensor 1150, such as a light sensor, a motion sensor, a position sensor, and other sensors.
  • the light sensor may include an ambient light sensor and a proximity sensor.
  • the ambient light sensor may obtain the brightness of the surrounding ambient light, adjust the brightness of the display panel 1141 according to the brightness of the ambient light, and the proximity sensor may be moved to the ear by the mobile phone 1100 At this time, the display panel 1141 and / or the backlight are turned off.
  • Motion sensors include acceleration sensors, which can detect the magnitude of acceleration in various directions (usually three axes), and can detect the magnitude and direction of gravity when stationary, and can be used to identify mobile phone posture applications (such as horizontal and vertical screen switching, related games, Magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tap) and so on.
  • the position sensor can be used to obtain the geographic location coordinates of the terminal.
  • the geographic location coordinates can be obtained through Global Positioning System (GPS), COMPASS System, GLONASS System, and Galileo System. System) and so on.
  • the position sensor can also be located through a base station of a mobile operating network, and a local area network such as Wi-Fi or Bluetooth, or a combination of the above positioning methods can be used to obtain more accurate mobile phone location information.
  • other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and the like, may not be described herein.
  • the audio circuit 1160, the speaker 1161, and the microphone 1162 may provide an audio interface between the user and the mobile phone 1100.
  • the audio circuit 1160 can transmit the received electrical data converted electrical signal to the speaker 1161, and the speaker 1161 converts it into a sound signal for output.
  • the microphone 1162 converts the collected sound signal into an electrical signal, and the audio circuit 1160 After receiving, it is converted into audio data, and then the audio data output processor 1080 processes it, and then sends it to another mobile phone via the RF circuit 1110 or the RF circuit 1111, or outputs the audio data to the memory 1120 for further processing.
  • WiFi is a short-range wireless transmission technology.
  • the mobile phone 1100 can help users send and receive email, browse web pages, and access streaming media through the WiFi module 1170. It provides users with wireless broadband Internet access.
  • FIG. 11 shows the WiFi module 1170, it can be understood that it does not belong to the necessary configuration of the mobile phone 1100, and can be omitted as needed without changing the essence of the invention.
  • the processor 1180 is a control center of the mobile phone 1100, and uses various interfaces and lines to connect various parts of the entire mobile phone. By running or executing software programs and / or modules stored in the memory 1120, and calling data stored in the memory 1120, Perform various functions and process data of the mobile phone 1100, so as to monitor the mobile phone as a whole.
  • the processor 1180 may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array ( field programmable array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.
  • the processor 1180 may implement or execute various exemplary logical blocks, modules, and circuits described in connection with the present disclosure.
  • the processor 1180 may also be a combination that implements computing functions, such as a combination including one or more microprocessors, a combination of a DSP and a microprocessor, and the like.
  • the processor 1180 may include one or more processor units.
  • the processor 1180 may further integrate an application processor and a modem processor.
  • the application processor mainly processes an operating system, a user interface, and an application program, and the modem processor mainly processes wireless communications. It can be understood that the foregoing modem processor may not be integrated into the processor 1180.
  • the mobile phone 1100 further includes a power supply 1190 (such as a battery) for supplying power to various components.
  • a power supply 1190 (such as a battery) for supplying power to various components.
  • the power supply can be logically connected to the processor 1180 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system.
  • the mobile phone 1100 may further include a camera, a Bluetooth module, and the like, and details are not described herein.
  • the memory 1120 is configured to store a program instruction
  • the processor 1180 is configured to cause the UE to perform the following operations according to the program instructions stored in the memory 1120:
  • the LTE RLC layer of the UE receives downlink packet data from the LTE access network through the RF circuit 1010, and the NR RLC layer of the UE receives from the NR access network through the RF circuit 1011 Downlink packet data;
  • the NR and PDCP layer of the UE After the reordering timer of the NR PDCP layer of the UE expires, the NR and PDCP layer of the UE obtains the ordered first group of data packets; and after the reordering timer of the NR PDCP layer of the UE expires The NR PDCP layer of the UE receives an ordered second set of data packets from the LTE RLC layer of the UE;
  • the NR PDCP layer of the UE reorders the first group of data packets and the second group of data packets to obtain a third group of data packets, and sends the third group of data packets to a higher layer of the UE.
  • the processor 1180 executes that when the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE receives the ordered second from the LTE RLC layer of the UE Group data packets, including:
  • the NR PDCP layer of the UE When the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE sends a first message to the LTE RLC layer of the UE, where the first message is used to indicate the LTE RLC of the UE Layer sends the ordered data packet to the NR PDCP layer of the UE, the LTE RLC layer of the UE does not wait for the UE's LTE RLC layer to reorder successfully or the LTE RLC layer of the UE according to the first message The sequenced second group of data packets is reported to the NR PDCP layer of the UE.
  • the LTE RLC layer of the UE does not wait for the UE's LTE RLC layer to reorder successfully or the UE's LTE RLC layer's reordering timer expires according to the first message.
  • the processor 1180 is further configured to cause the UE to perform the following operations according to the program instructions stored in the memory 1120:
  • the UE's LTE RLC layer reports the ordered fourth set of data to the UE's NR PDCP layer package.
  • the processor 1180 executes that when the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE receives the sorted first order from the LTE RLC layer of the UE.
  • Two sets of data packets including:
  • the NR PDCP layer of the UE sends a first message to the LTE RLC layer of the UE, where the first message is used to indicate the LTE RLC of the UE Layer sends the ordered data packet to the NR PDCP layer of the UE, and the LTE RLC layer of the UE does not wait for the UE's LTE RLC layer to be successfully reassembled according to the first message, and reports to the NR PDCP layer of the UE Sorted second group of packets.
  • the UE's LTE RLC layer after the UE's LTE RLC layer does not wait for the UE's LTE RLC layer to be successfully restructured according to the first message, it reports the ordered second set of data packets to the UE's NR PDCP layer.
  • the processor 1180 is further configured to cause the UE to perform the following operations according to the program instructions stored in the memory 1120:
  • the LTE RLC layer of the UE After the LTE RLC layer of the UE is successfully reorganized, the LTE RLC layer of the UE reports the fourth group of data packets after the reorganization is successful to the NR PDCP layer of the UE.
  • the processor 1180 executes that when the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE receives the sorted first order from the LTE RLC layer of the UE.
  • Two sets of data packets including:
  • the NR PDCP layer of the UE When the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE sends a second message to the LTE RLC layer of the UE, where the second message is used to indicate the LTE RLC of the UE.
  • the layer reports to the UE's NR PDCP layer how long the reordering timer of the UE's LTE RLC layer has timed out.
  • the UE's LTE RLC layer reports to the UE's NR PDCP according to the second message.
  • the layer reports the length of time that the reordering timer of the UE's LTE RLC layer has timed out, and the NR PDCP layer of the UE extends the time of the reordering timer of the NR PDCP layer of the UE according to the time length information, After the UE's LTE RLC layer reordering succeeds or the UE's LTE RLC layer reordering timer expires, the UE's LTE RLC layer reports the sorted second set of data to the UE's NR PDCP layer package.
  • the NR PDCP layer of the UE extends the duration of the reordering timer of the NR PDCP layer of the UE according to the duration information.
  • the instructions cause the UE to perform the following operations:
  • the NR PDCP layer of the UE determines that the duration indicated by the duration information is less than or equal to the extendable duration of the reordering timer of the NR PDCP layer of the UE.
  • the processor 1180 executes that when the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE receives the sorted first order from the LTE RLC layer of the UE.
  • Two sets of data packets including:
  • the NR PDCP layer of the UE When the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE sends a second message to the LTE RLC layer of the UE, where the second message is used to indicate the LTE RLC of the UE.
  • the layer reports to the UE's NR PDCP layer how long the reordering timer of the UE's LTE RLC layer has timed out.
  • the UE's LTE RLC layer reports to the UE's NR PDCP according to the second message.
  • the NR PDCP layer of the UE determines that the duration indicated by the time length information is greater than the reordering timing of the NR PDCP layer of the UE.
  • the extendable duration of the router, the NR PDCP layer of the UE sends a third message to the LTE RLC layer of the UE, the third message is used to instruct the LTE RLC layer of the UE to immediately report the sorted data packet,
  • the LTE RLC layer of the UE does not wait for the UE's LTE RLC layer to reorder successfully or the UE's LTE RLC layer's reordering timer expires, and reports to the UE's NR PDCP layer. Sorted second group of packets.
  • the LTE RLC layer of the UE does not wait for the reordering of the LTE RLC layer of the UE successfully or the reordering timer of the LTE RLC layer of the UE times out to the NR of the UE according to the third message.
  • the processor 1180 is further configured to cause the UE to perform the following operations according to the program instructions stored in the memory 1120:
  • the UE's LTE RLC layer reports the ordered fourth set of data to the UE's NR PDCP layer package.
  • the processor 1180 executes that when the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE receives the ordered second from the LTE RLC layer of the UE Group data packets, including:
  • the NR PDCP layer of the UE sends a fourth message to the LTE RLC layer of the UE, where the fourth message is used to indicate the LTE RLC of the UE
  • the layer reports to the UE's NR PDCP layer the acknowledgement AM mode packet reassembly status of the UE's LTE RLC layer, and the UE's LTE RLC layer reports the UE's NR PDCP layer according to the fourth message
  • the AM mode packet reassembly status of the UE's LTE RLC layer, the NR PDCP layer of the UE extends the duration of the reordering timer of the UE's NR PDCP layer according to the reconfiguration status, and when the UE's LTE RLC layer AM After the mode data packet is successfully reassembled, the LTE RLC layer of the UE reports to the NR PDCP layer of the UE a second group
  • the processor 1180 is further configured to use a program stored in the memory 1120
  • the instruction does the following:
  • the NR PDCP layer of the UE determines that the reconfiguration of the AM mode data packet of the LTE RLC layer of the UE indicated by the reassembly status requires a time less than or equal to the reordering timer of the NR PDCP layer of the UE that can be extended The length of time.
  • the processor 1180 executes that when the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE receives the ordered second from the LTE RLC layer of the UE Group data packets, including:
  • the NR PDCP layer of the UE sends a fourth message to the LTE RLC layer of the UE, where the fourth message is used to indicate the LTE RLC of the UE
  • the layer reports to the UE's NR PDCP layer the acknowledgement AM mode packet reassembly status of the UE's LTE RLC layer, and the UE's LTE RLC layer reports the UE's NR PDCP layer according to the fourth message
  • the AM mode data packet reassembly status of the UE's LTE RLC layer, and the NR PDCP layer of the UE determines that the AM mode data packet reconfiguration of the UE's LTE RLC layer indicated by the reconfiguration status takes longer than the UE's Extendable duration of the reordering timer of the NR PDCP layer, the NR PDCP layer of the UE sends a fifth message to the LTE RLC layer
  • the LTE RLC layer of the UE reports the sorted second set of data packets to the NR PDCP layer of the UE according to the fifth message without waiting for the UE's LTE RLC layer to be successfully reorganized.
  • the processor 1180 is further configured to cause the UE to perform the following operations according to the program instructions stored in the memory 1120:
  • the LTE RLC layer of the UE After the LTE RLC layer of the UE is successfully reorganized, the LTE RLC layer of the UE reports the fourth group of data packets after the reorganization is successful to the NR PDCP layer of the UE.
  • the processor 1180 is further configured to cause the UE to execute according to the program instructions stored in the memory 1120 The following actions:
  • the NR PDCP layer of the UE performs repeated detection processing on the fourth group of data packets and the second group of data packets.
  • the processor 1180 executes the NR PDCP layer of the UE to reorder the first group of packets and the second group of packets to obtain a third group of packets, and the third group of packets Sending the data packet to a higher layer of the UE includes:
  • the NR PDCP layer of the UE performs repeated detection processing on the first group of data packets and the second group of data packets, and deletes duplicate data packets among the first group of data packets and the second group of data packets ;
  • the NR PDCP layer of the UE reorders the first group of data packets and the second group of data packets after repeated detection processing to obtain a third group of data packets, and sends the third group of data packets to the High level of UE.
  • the processor 1180 is used for the UE in the split bearer mode of EN-DC, the LTE RLC layer of the UE receives downlink packet data from the LTE access network through the RF circuit 1110, and the NR and RLC layer of the UE pass The RF circuit 1111 receives downlink packet data from the NR access network. After the reordering timer of the NR PDCP layer of the UE expires, the NR PDCP layer of the UE obtains the first group of data packets that have been sorted.
  • the NR PDCP layer does not directly report the ordered first group of data packets, but after the NR PDCP layer of the UE receives the ordered second group of data packets from the UE's LTE RLC layer, the UE's NR PDCP The layer reorders the first group of data packets and the second group of data packets to obtain a third group of data packets, and then sends the third group of data packets to a higher layer of the UE, thereby avoiding receiving the first group of data packets. After the two sets of data packets, the first set of data packets has been reported, and the second set of data packets is not within the receiving window of the NR PDCP layer, resulting in packet loss, so complete downlink reception can be guaranteed.
  • the memory 1120 is configured to store a program instruction
  • the processor 1180 is configured to cause the UE to perform the following operations according to the program instructions stored in the memory 1120:
  • the LTE RLC layer of the UE receives downlink packet data from the LTE access network, and the NR RLC layer of the UE receives downlink packet data from the NR access network; wherein the UE
  • the reordering function of the LTE RLC layer is turned off, and the reordering function is completed by the NR PDCP layer of the UE.
  • the processor 1180 executing the reordering function of the UE's LTE RLC layer is turned off, including:
  • the reordering function of the LTE RLC layer of the UE that is pre-configured is turned off.
  • the execution of the reordering function of the UE's LTE RLC layer by the processor 1180 includes:
  • the reordering function of the LTE RLC layer of the UE is turned off.
  • the execution of the reordering function of the UE's LTE RLC layer by the processor 1180 includes:
  • the reordering function of the LTE RLC layer of the UE is turned off.
  • the processor 1180 is used to control the reordering function of the UE's LTE RLC layer to be turned off, and the reordering function is completed by the NR and PDCP layer of the UE, thereby avoiding that the NR PDCP layer and the LTE RLC layer are simultaneously re-ranked
  • the packet loss caused by the sequencing can ensure the complete reception of the downlink.
  • FIG. 12 is a schematic diagram of a communication device according to an embodiment of the present application.
  • the communication device 1200 may be a chip, and the chip includes a processing unit and a communication unit.
  • the processing unit may be a processor 1210, and the processor may be various types of processors described above.
  • the communication unit may be, for example, an input / output interface 1220, a pin, or a circuit.
  • the communication unit may include a system bus or be connected to the system bus.
  • the communication device further includes a storage unit, and the storage unit may be a memory 1230 inside the chip, such as a register, a cache, a random access memory (RAM), an EEPROM, or a flash memory; etc .;
  • the storage unit may also be a memory located outside the chip, and the memory may be various types of memories described above.
  • a processor is connected to the memory, and the processor can execute instructions stored in the memory to cause the communication device to perform the methods shown in FIG. 4 to FIG. 9 described above.
  • the present invention may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present invention are wholly or partially generated.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable medium to another computer-readable medium, for example, the computer instructions may be transmitted from a website site, computer, server, or data center through a cable (Such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) for transmission to another website site, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes one or more available medium integration.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state hard disk).

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Abstract

本发明实施例涉及一种下行数据的接收方法及终端设备。方法包括：UE在EN-DC的Split承载方式下，所述UE的LTE RLC层从LTE接入网接收下行分组数据，所述UE的NR RLC层从NR接入网接收下行分组数据；当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层得到已排序的第一组数据包；以及，当所述UE的NRPDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTERLC层接收已排序的第二组数据包；所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层。或者，所述UE的LTE RLC层的重排序功能关闭，重排序功能由所述UE的NR PDCP层完成。本发明实施例，能够保证下行链路的完整接收。

Description

一种下行数据的接收方法及终端设备
本申请要求于2018年6月7日提交中国国家知识产权局、申请号为201810582053.7的中国专利申请的优先权，以及于2018年11月1日提交中国国家知识产权局专利局、申请号为201811294987.7的中国专利申请的优先权，它们的全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信领域，尤其涉及一种下行数据的接收方法及终端设备(user equipment，UE)。
背景技术
在第五代移动通信技术(5th-generation，5G)新无线(new radio，NR)接入技术的部署初期，提出了一种非独立(non-standalone，NSA)组网方式，即第四代移动通信技术(4th-generation，4G)-5G无线接入的双连接(EUTRAN-NR Dual Connectivity，EN-DC)组网方式。
EN-DC的网络架构，具体包括：
UE与基站间的连接：UE同时连接到4G长期演进(long term evolution，LTE)接入网的基站(Evolved Node B，eNB)和5G NR的基站(5G Node B，En-gNB)。其中，eNB为EN-DC中的主节点(master node，MN)，在EN-DC中也称为MeNB；En-gNB为EN-DC中的辅节点(secondary node，SN)，在EN-DC中也称为SgNB。
基站与核心网间的连接：eNB通过S1-C接口和S1-U接口分别连接到4G核心网的移动管理实体(mobility management entity，MME)和服务网关(serving gateway，SGW)。En-gNB与4G核心网的MME之间没有连接；En-gNB是否通过S1-U接口与4G核心网的SGW连接取决于采用何种EN-DC的协议栈架构进行数据传输。
基站与基站间的连接：eNB与En-gNB之间通过X2口进行连接。
EN-DC的用户面协议栈架构：
为了方便描述，首先解释针对EN-DC用户面配置的几个概念。
小区组(cell group):在EN-DC中，将配置给UE且分别属于MeNB和SgNB的小区分为两个组(group)。其中，属于MeNB的小区称为EN-DC中主节点下的小区组(master cell group，MCG)，属于SgNB的小区称为EN-DC中辅节点下的小区组(secondary cell group，SCG)；
无线链路控制(radio link control，RLC)承载:在一个小区组中，一个无线承载的RLC配置和逻辑信道的配置称为RLC承载；
MCG承载：RLC承载只配置在MCG的无线承载；
SCG承载：RLC承载只配置在SCG的无线承载；
分离(Split)承载：RLC承载同时配置在MCG和SCG的无线承载；
MN终止的承载：PDCP在MeNB的无线承载；
SN终止的承载：PDCP在SgNB的无线承载；
从UE角度来看，UE能感知的有三种承载，即MCG承载，SCG承载和Split承载。
从网络侧来看，共有六种承载，即MN终止的MCG承载，MN终止的SCG承载，MN终止的Split承载，SN终止的MCG承载，SN终止的SCG承载和SN终止的Split承载。
5G NSA下，LTE+NR DC(即EN-DC)是一个重要使用场景。针对EN-DC的Split承载，下行数据是由LTE和NR两条链接同时进行接收的。两个网络在协议栈上有很多差异性。
目前的协议规定，LTE协议栈的PDCP层没有重排序功能，对于EN-DC的Split承载，当前UE协议栈分组数据汇聚协议(packet data convergence protocol，PDCP)层使用NR的PDCP。NR PDCP的重排序基本功能：当PDCP层接收数据包的序号出现乱序时，开启重排序定时器。当该定时器超时，上报排序后的数据包；或者重排序成功，上报排序后的数据包。
对于EN-DC的Split承载，LTE网络RLC层对数据包进行重排序，当NR PDCP层重排序定时器开启时，LTE RLC层的重排序定时器也开启。LTE RLC层在LTE RLC层的重排序定时器超时的情况下，向NR PDCP层上报排序后的数据包。NR PDCP层在NR PDCP层的重排序定时器超时的情况下，上传排序后的数据包给应用的数据处理模块，之后NR PDCP层再接收到LTE RLC层上报的数据包后，会因为LTE RLC层上报的数据包不在NR PDCP层的接收窗口内而丢弃LTERLC层上传的排序后的数据包，导致下行接收数据丢包。
发明内容
本发明实施例提供了一种下行数据的接收方法及UE，能够保证下行链路的完整接收。
第一方面，提供了一种下行数据的接收方法。UE在EN-DC的Split承载方式下，所述UE的LTE RLC层从LTE接入网接收下行分组数据，所述UE的NR RLC层从NR接入网接收下行分组数据；当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层得到已排序的第一组数据包；以及，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTERLC层接收已排序的第二组数据包；所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层。
本发明实施例，UE在EN-DC的Split承载方式下，所述UE的LTE RLC层从LTE接入网接收下行分组数据，所述UE的NR RLC层从NR接入网接收下行分组数据；当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层得到已排序的第一组数据包，所述UE的NR PDCP层不是直接上报已排序的第一组数据包，而是在所述UE的NR PDCP层从所述UE的LTERLC层接收已排序的第二组数据包之后，所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，再将所述第三组数据包发送给所述UE的高层，从而避免在接收到第二组数据包之后，第一组数据包已经上报，第二组数据包不在NR PDCP层的接收窗口内，导致丢包，因此能够保证下行链路的完整接收。
在一种可能的实施方式中，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第一消息，所述第一消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层发送已排序的数据包，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包。根据该实施方式，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层通知所述UE的LTE RLC层，以使所述UE的LTE RLC层不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包，从而在保证下行链路的完整接收的同时保证时效性。
基于前述实施方式，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包。根据该实施方式，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包，能够保证上报数据的完整性。
在一种可能的实施方式中，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第一消息，所述第一消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层发送已排序的数据包，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包。根据该实施方式，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层通知所述UE的LTE RLC层，以使所述UE的LTE RLC层不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包，从而在保证下行链路的完整接收的同时保证时效性。
基于前述实施方式，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包。根据该实施方式，当所述UE的LTE RLC层重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包，能够保证上报数据的完整性。
基于前述实施方式，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包之后，所述UE的NR PDCP层对所述第四组数据包和所述第二组数据包进行重复检测处理。根据该实施方式，可以删除所述第四组数据包和所述第二组数据包中重复的数据包。
在一种可能的实施方式中，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第二消息，所述第二消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE的LTE RLC层根据所述第二消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE 的NR PDCP层根据所述时长信息延长所述UE的NR PDCP层的重排序定时器时长，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第二组数据包。根据该实施方式，通过延长所述UE的NR PDCP层的重排序定时器的时长的方式，可以实现NR PDCP层的数据包的延时上报，并且不改变LTE RLC层的重排序过程。
基于前述实施方式，所述UE的NR PDCP层根据所述时长信息延长所述UE的NR PDCP层的重排序定时器的时长之前，所述UE的NR PDCP层确定所述时长信息所指示的时长小于或等于所述UE的NR PDCP层的重排序定时器的可延长的时长。根据该实施方式，考虑到了NR PDCP层的重排序定时器的可延长的时长，避免对时效性要求高的业务产生影响。
在一种可能的实施方式中，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第二消息，所述第二消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE的LTE RLC层根据所述第二消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE的NR PDCP层确定所述时长信息所指示的时长大于所述UE的NR PDCP层的重排序定时器的可延长的时长，所述UE的NR PDCP层向所述UE的LTE RLC层发送第三消息，所述第三消息用于指示所述UE的LTE RLC层立即上报已排序的数据包，所述UE的LTE RLC层根据所述第三消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包。根据该实施方式，考虑到了NR PDCP层的重排序定时器的可延长的时长，当NR PDCP层的重排序定时器的可延长的时长不满足需求时，采用通知LTE RLC层立即上报已排序数据包的方案，避免对时效性要求高的业务产生影响。
基于前述实施方式，所述UE的LTE RLC层根据所述第三消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包。根据该实施方式，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包，能够保证上报数据的完整性。
在一种可能的实施方式中，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第四消息，所述第四消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的确认模式(acknowledged mode，AM)模式数据包重组状态，所述UE的LTE RLC层根据所述第四消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的AM模式数据包重组状态，所述UE的NR PDCP层根据所述重组状态延长所述UE的NR PDCP层的重排序定时器的时长，当所述UE的LTE RLC层AM模式数据包重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第二组数据包。根据该实施方式，通过延长所述UE的NR PDCP层的重排序定时器的时长的方式，可以实现NR PDCP层的数据包的延 时上报，并且不改变LTE RLC层的重组过程。
基于前述实施方式，所述UE的NR PDCP层根据所述重组状态延长所述UE的NR PDCP层的重排序定时器的时长之前，所述UE的NR PDCP层确定所述重组状态所指示的所述UE的LTE RLC层的AM模式数据包的重组还需时间小于或等于所述UE的NR PDCP层的重排序定时器的可延长的时长。根据该实施方式，考虑到了NR PDCP层的重排序定时器的可延长的时长，避免对时效性要求高的业务产生影响。
在一种可能的实施方式中，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第四消息，所述第四消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的AM模式数据包重组状态，所述UE的LTE RLC层根据所述第四消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的AM模式数据包重组状态，所述UE的NR PDCP层确定所述重组状态所指示的所述UE的LTE RLC层的AM模式数据包的重组还需时间大于所述UE的NR PDCP层的重排序定时器的可延长的时长，所述UE的NR PDCP层向所述UE的LTE RLC层发送第五消息，所述第五消息用于指示所述UE的LTE RLC层立即上报已排序的数据包，所述UE的LTE RLC层根据所述第五消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包。根据该实施方式，考虑到了NR PDCP层的重排序定时器的可延长的时长，当NR PDCP层的重排序定时器的可延长的时长不满足需求时，采用通知LTE RLC层立即上报已排序数据包的方案，避免对时效性要求高的业务产生影响。
基于前述实施方式，所述UE的LTE RLC层根据所述第五消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包。根据该实施方式，当所述UE的LTE RLC层重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包，能够保证上报数据的完整性。
基于前述实施方式，所述UE的LTE RLC层向所述UE的NR PDCP层上报第四组数据包之后，所述UE的NR PDCP层对所述第四组数据包和所述第二组数据包进行重复检测处理。根据该实施方式，可以删除所述第四组数据包和所述第二组数据包中重复的数据包。
基于前述实施方式，所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重复检测处理，删除所述第一组数据包和所述第二组数据包之中重复的数据包；所述UE的NR PDCP层对重复检测处理后的所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层。根据该实施方式，可以删除所述第一组数据包和所述第二组数据包中重复的数据包。
第二方面，提供了一种下行数据的接收方法。UE在EN-DC的Split承载方式下，所述UE的LTE RLC层从LTE接入网接收下行分组数据，所述UE的NR RLC层从NR接入网接收下行分组数据；其中，所述UE的LTE RLC层的重排序功能关闭，重排序功能由所述UE的NR PDCP层完成。
本发明实施例，所述UE的LTE RLC层的重排序功能关闭，重排序功能由所述UE的NR PDCP层完成，从而避免了NR PDCP层和LTE RLC层同时进行重排序所导致的丢 包，因此能够保证下行链路的完整接收。
在一种可能的实施方式中，预先配置所述UE的LTE RLC层的重排序功能关闭。这种方式简单、容易实现。
在一种可能的实施方式中，当所述UE的NR PDCP层开启重排序定时器时，关闭所述UE的LTE RLC层的重排序功能。这种方式能够避免NR PDCP层和LTE RLC层同时进行重排序，但不影响NR PDCP层未进行重排序时LTE RLC层的重排序，能够提高数据处理效率。
在一种可能的实施方式中，所述UE接收无线资源控制(Radio Resource Control，RRC)消息；根据所述RRC消息，关闭所述UE的LTE RLC层的重排序功能。这种方式能够提高网络侧对UE的控制，可以由网络侧根据资源调度情况灵活控制关闭所述UE的LTE RLC层的重排序功能。
第三方面，本发明实施例提供了一种UE，该UE可以实现上述第一方面或第二方面方法设计中所执行的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在一个可能的设计中，该UE的结构中包括处理器，该处理器被配置为支持该UE执行上述第一方面或第二方面方法中相应的功能。该UE还可以包括存储器，该存储器用于与处理器耦合，其保存该UE必要的程序指令和数据。该UE还可以包括通信接口，该通信接口用于发送或接收信息等。
第四方面，本发明实施例提供了一种通信装置，该通信装置可以例如是芯片，该通信装置可以设置于UE中，该通信装置包括处理器和接口。该处理器被配置为支持该通信装置执行上述第一方面或第二方面方法中相应的功能。该接口用于支持该通信装置与其他通信装置或其他网元之间的通信。该通信装置还可以包括存储器，该存储器用于与处理器耦合，其保存该通信装置必要的程序指令和数据。
第五方面，本发明实施例提供了一种计算机存储介质，所述计算机存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述第一方面或第一方面的任意一种可能的设计中所述的方法或上述第二方面或第二方面的任意一种可能的设计中所述的方法。
第六方面，本发明实施例提供了一种计算机程序产品，其包含指令，当所述程序被计算机所执行时，该指令使得计算机执行上述第一方面或第一方面的任意一种可能的设计中所述的方法或上述第二方面或第二方面的任意一种可能的设计中所述的方法。
第七方面，本发明实施例提供了一种计算机程序，其包含指令，当所述程序被计算机所执行时，该指令使得计算机执行上述第一方面或第一方面的任意一种可能的设计中所述的方法或上述第二方面或第二方面的任意一种可能的设计中所述的方法。
本发明实施例，UE在EN-DC的Split承载方式下，所述UE的LTE RLC层从LTE接入网接收下行分组数据，所述UE的NR RLC层从NR接入网接收下行分组数据；当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层得到已排序的第一组数据包，所述UE的NR PDCP层不是直接上报已排序的第一组数据包，而是在所述UE的NR PDCP层从所述UE的LTERLC层接收已排序的第二组数据包之后，所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，再所述第三组数据包发送给所述UE的高层，从而避免在接收到第二组数据包之后，第一组数 据包已经上报，第二组数据包不在接收窗口内，导致丢包，因此能够保证下行链路的完整接收。或者，所述UE的LTE RLC层的重排序功能关闭，重排序功能由所述UE的NR PDCP层完成，从而避免了NR PDCP层和LTE RLC层同时进行重排序所导致的丢包，因此能够保证下行链路的完整接收。
附图说明
图1为本发明实施例提供的一种EN-DC的网络架构示意图；
图2为EN-DC的UE侧的用户面协议栈架构示意图；
图3为EN-DC的网络侧的用户面协议栈架构示意图；
图4为本发明实施例提供的一种下行数据的接收方法通信示意图；
图5A为通常的一种UE的LTE RLC层重排序上报示意图；
图5B为本发明实施例的一种UE的LTE RLC层重排序上报示意图；
图5C为通常的另一种UE的LTE RLC层重排序上报示意图；
图5D为本发明实施例的另一种UE的LTE RLC层重排序上报示意图；
图6为本发明实施例提供的另一种下行数据的接收方法通信示意图；
图7为本发明实施例提供的另一种下行数据的接收方法通信示意图；
图8为本发明实施例提供的另一种下行数据的接收方法通信示意图；
图9为本发明实施例提供的另一种下行数据的接收方法通信示意图；
图10示出了上述实施例中所涉及的UE的一种可能的结构示意图；
图11为本申请实施例提供的另一种UE结构示意图；
图12为本申请实施例提供的一种通信装置示意图。
具体实施方式
图1为本发明实施例提供的一种EN-DC的网络架构示意图。参照图1，UE101同时连接到4G长期演进(long term evolution，LTE)接入网的基站(Evolved Node B，eNB)102和5G NR的基站(5G Node B，En-gNB)103。其中，eNB102为EN-DC中的主节点(master node，MN)，在EN-DC中也称为MeNB；En-gNB103为EN-DC中的辅节点(secondary node，SN)，在EN-DC中也称为SgNB。eNB102通过S1-C接口和S1-U接口分别连接到4G核心网的移动管理实体(mobility management entity，MME)104和服务网关(serving gateway，SGW)105。En-gNB103与4G核心网的MME104之间没有连接；En-gNB103是否通过S1-U接口与4G核心网的SGW105连接取决于采用何种EN-DC的协议栈架构进行数据传输。eNB102与En-gNB103之间通过X2口进行连接。
由图1可见，UE101具有和eNB102之间的连接，以及具有和En-gNB103之间的连接，也就是UE101具有与不同接入网之间的双连接。
基于图1所示的EN-DC的网络架构，UE可以配置多种承载方式。在EN-DC中，将配置给UE且分别属于MeNB和SgNB的小区分为两个组(group)，每个组称为小区组(cell group)。其中，属于MeNB的小区称为EN-DC中主节点下的小区组(master cell group，MCG)，属于SgNB的小区称为EN-DC中辅节点下的小区组(secondary cell group，SCG)；在一个小区组中，一个无线承载的RLC配置和逻辑信道的配置称为无线链路控制(radio  link control，RLC)承载；RLC承载只配置在MCG的无线承载称为MCG承载；RLC承载只配置在SCG的无线承载称为SCG承载；RLC承载同时配置在MCG和SCG的无线承载称为分离(Split)承载。PDCP在MeNB的无线承载称为MN终止的承载；PDCP在SgNB的无线承载称为SN终止的承载。从UE角度来看，UE能感知的有三种承载，即MCG承载，SCG承载和Split承载。
图2为EN-DC的UE侧的用户面协议栈架构示意图。参照图2，对于EN-DC的MCG承载，PDCP层使用LTE PDCP或者NR PDCP，RLC层使用LTE RLC，MAC层使用LTE MAC；对于EN-DC的SCG承载，PDCP层使用NR PDCP，RLC层使用NR RLC，MAC层使用NR MAC；对于EN-DC的Split承载，PDCP层使用NR PDCP，RLC层使用LTE RLC和NR RLC，MAC层使用LTE MAC和NR MAC。
从网络侧来看，共有六种承载，即MN终止的MCG承载，MN终止的SCG承载，MN终止的Split承载，SN终止的MCG承载，SN终止的SCG承载和SN终止的Split承载。
图3为EN-DC的网络侧的用户面协议栈架构示意图。参照图3，对于EN-DC的MN终止的MCG承载，PDCP层使用MeNB的LTE PDCP或者NR PDCP，RLC层使用MeNB的LTE RLC，MAC层使用MeNB的LTE MAC；对于EN-DC的MN终止的SCG承载，PDCP层使用MeNB的NR PDCP，RLC层使用SgNB的NR RLC，MAC层使用SgNB的NR MAC；对于EN-DC的MN终止的Split承载，PDCP层使用MeNB的NR PDCP，RLC层使用MeNB的LTE RLC和SgNB的NR RLC，MAC层使用MeNB的LTE MAC和SgNB的NR MAC。对于EN-DC的SN终止的MCG承载，PDCP层使用SgNB的NR PDCP，RLC层使用MeNB的LTE RLC，MAC层使用MeNB的LTE MAC；对于EN-DC的SN终止的SCG承载，PDCP层使用SgNB的NR PDCP，RLC层使用SgNB的NR RLC，MAC层使用SgNB的NR MAC；对于EN-DC的SN终止的Split承载，PDCP层使用SgNB的NR PDCP，RLC层使用MeNB的LTE RLC和SgNB的NR RLC，MAC层使用MeNB的LTE MAC和SgNB的NR MAC。
本发明实施例中，如果UE配置了Split承载，当UE的NR PDCP模块接收数据产生乱序时，针对如何减少Split承载上的数据接收的丢包，提出了解决方案。
图4为本发明实施例提供的一种下行数据的接收方法通信示意图，该实施例可以基于图1所示的EN-DC的网络架构以及图2所示的UE的协议栈架构，执行主体为UE，主要涉及UE的NR PDCP层(简称UENR PDCP)、UE的NR RLC层(简称UENR RLC)、UE的LTE RLC层(简称UELTERLC)、NR接入网(简称NR)和LTE接入网(简称LTE)，该方法包括：
步骤401，UE在EN-DC的Split承载方式下，所述UE的LTE RLC层从LTE接入网接收下行分组数据，所述UE的NR RLC层从NR接入网接收下行分组数据；
步骤402，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层得到已排序的第一组数据包；
步骤403，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTERLC层接收已排序的第二组数据包；
步骤404，所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重 排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层。
下面描述以上各个步骤的具体执行方式。
首先在步骤401，UE在EN-DC的Split承载方式下，所述UE的LTE RLC层从LTE接入网接收下行分组数据，所述UE的NR RLC层从NR接入网接收下行分组数据。可以理解的是，所述UE的LTE RLC层从LTE接入网接收下行分组数据后，可以对下行分组数据进行相应处理(例如，重组或重排序)后发送给所述UE的NR PDCP层；所述UE的NR RLC层从NR接入网接收下行分组数据后，可以对下行分组数据进行相应处理(例如，重组或透传)后发送给所述UE的NR PDCP层。也就是说，所述UE的NR PDCP层接收下行分组数据的来源有所述UE的LTE RLC层和所述UE的NR RLC层两个来源，所述UE的NR PDCP层对下行分组数据的完整接收有赖于所述UE的LTE RLC层和所述UE的NR RLC层上报下行分组数据时的配合。
然后在步骤402，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层得到已排序的第一组数据包。可以理解的是，当所述UE的NR PDCP层的数据包(即PDCP协议数据单元(Protocol Data Unit，PDU)或RLC服务数据单元(service Data Unit，SDU))的序号(sequence number，SN)产生乱序时，开启重排序定时器(t-reordering定时器)，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层得到已排序的第一组数据包，其中，上述已排序的第一组数据包即SN按照从小到大顺序排列的数据包，可能为完整的已排序的第一组数据包，例如，SN依次为1、2、3、4、5，也可能为不完整的已排序的第一组数据包，例如，SN依次为1、3、4、5、7，中间缺少SN为2的数据包和SN为6的数据包。
接着在步骤403，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包。可以但不限于包括以下几种情况：
第一种情况，在EN-DC Split模式下，当UE的NR PDCP层的重排序定时器超时，通知UE的LTE RLC层，使UE的LTE RLC层上报已经排序好的数据包给UE的NR PDCP层。
在一种可能的实施方式中，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第一消息，所述第一消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层发送已排序的数据包，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包。根据该实施方式，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层通知所述UE的LTE RLC层，以使所述UE的LTE RLC层不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包，从而在保证下行链路的完整接收的同时保证时效性。
图5A为通常的一种UE的LTE RLC层重排序上报示意图。参照图5A，第一时刻，UE已收到数据包2、3、5，未收到数据包1、4，其中，数据包3、4为需要重组的数据包，该时刻数据包2、3、5排序未成功，数据包3重组也未成功，通常的，UE的LTE RLC层不向NR PDCP层上报数据包；在第一时刻之后的第二时刻，UE已收到数据包1、2、3、5， 未收到数据包4，其中，数据包3、4为需要重组的数据包，该时刻数据包1、2排序成功，数据包3重组未成功，通常的，UE的LTE RLC层向NR PDCP层上报排序成功的数据包1、2。可以理解的是，上述数据包的序号仅为举例说明，数据包1、2、3、4、5为一个重排序窗口内的数据包，数据包1为该重排序窗口内的序号最小的数据包，重排序成功(也可称为排序成功)即收到重排序窗口内的序号最小的数据包在内的多个连续的数据包，重排序成功后重排序窗口会发生移动。
图5B为本发明实施例的一种UE的LTE RLC层重排序上报示意图。参照图5B，第一时刻，UE已收到数据包2、3、5，未收到数据包1、4，其中，数据包3、4为需要重组的数据包，该时刻数据包2、3、5排序未成功，数据包3重组也未成功，本发明实施例中，虽然该时刻数据包排序未成功，重组也未成功，但是由于UE的LTE RLC层接收到前述第一消息，因此UE的LTE RLC层向NR PDCP层上报已排序数据包2、5。可以理解的是，这种情况下，前述已排序的第二组数据包即为已排序数据包2、5。
需要说明的是，本文中所述的排序成功，也可称为重排序成功。在一些实施例中，所述的已排序数据包可以是在排序未成功之前，已经收到并已排序的若干个并不连续的数据包。
基于前述实施方式，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包。根据该实施方式，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包，能够保证上报数据的完整性。
参照图5A和图5B，第一时刻，UE已收到数据包2、3、5，未收到数据包1、4，其中，数据包3、4为需要重组的数据包，该时刻数据包2、3、5排序未成功，数据包3重组也未成功，但是由于UE的LTE RLC层接收到上述第一消息，因此UE的LTE RLC层向NR PDCP层上报已排序数据包2、5，可以理解的是，这种情况下，前述已排序的第二组数据包即为已排序数据包2、5。再参照图5A，第二时刻，UE已收到数据包1、2、3、5，未收到数据包4，其中，数据包3、4为需要重组的数据包，该时刻数据包1、2排序成功，数据包3重组未成功，UE的LTE RLC层在重排序成功之后向NR PDCP层上报排序成功的数据包1、2，可以理解的是，这种情况下，前述已排序的第四组数据包即为排序成功的数据包1、2。
基于前述实施方式，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包之后，所述UE的NR PDCP层对所述第四组数据包和所述第二组数据包进行重复检测处理。根据该实施方式，可以删除所述第四组数据包和所述第二组数据包中重复的数据包。
例如，若前述已排序的第四组数据包为排序成功的数据包1、2，前述已排序的第二组数据包为已排序数据包2、5，则对第四组数据包和第二组数据包进行重复检测处理后，可以删除两者中重复的数据包2。
在一种可能的实施方式中，当所述UE的NR PDCP层的重排序定时器超时之后，所 述UE的NR PDCP层向所述UE的LTE RLC层发送第一消息，所述第一消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层发送已排序的数据包，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包。根据该实施方式，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层通知所述UE的LTE RLC层，以使所述UE的LTE RLC层不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包，从而在保证下行链路的完整接收的同时保证时效性。
图5C为通常的另一种UE的LTE RLC层重排序上报示意图。参照图5C，第一时刻，UE已收到数据包2、3、5，未收到数据包1、4，其中，数据包3、4为需要重组的数据包，该时刻数据包数据包2、5排序未成功，数据包3重组也未成功，通常的，UE的LTE RLC层不向NR PDCP层上报数据包；在第一时刻之后的第三时刻，UE已收到数据包2、3、4、5，未收到数据包1，其中，数据包3、4为需要重组的数据包，该时刻数据包数据包2、5排序未成功，数据包3、4重组成功，通常的，UE的LTE RLC层不向NR PDCP层上报数据包。可以理解的是，重组成功即收到全部需要重组的数据包。
图5D为本发明实施例的另一种UE的LTE RLC层重排序上报示意图。参照图5D，第一时刻，UE已收到数据包2、3、5，未收到数据包1、4，其中，数据包3、4为需要重组的数据包，该时刻数据包2、5排序未成功，数据包3重组也未成功，但是由于UE的LTE RLC层接收到前述用于指示所述UE的LTE RLC层向所述UE的NR PDCP层发送已排序的数据包的第一消息，因此UE的LTE RLC层向NR PDCP层上报已排序数据包2、5。可以理解的是，在这种情况下，前述已排序的第二组数据包即为已排序数据包2、5。可选地，UE的LTE RLC层还向NR PDCP层上报已接收到的需重组数据包3。
基于前述实施方式，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包。根据该实施方式，当所述UE的LTE RLC层重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包，能够保证上报数据的完整性。
参照图5D，第三时刻，UE已收到数据包2、3、4、5，未收到数据包1，其中，数据包3、4为需要重组的数据包，该时刻数据包2、5排序未成功，数据包3、4重组成功，通常的，这种情况下，由于序号最小的数据包1还没有收到，故当前没有重排序成功的数据包，虽然其中的数据包3、4重组成功，但UE的LTE RLC层不向NR PDCP层仅在数据包重排序成功后才会向NR PDCP层上报重排序成功后的数据包，或仅在重排序定时器超时后才会向NR PDCP层上报已排序的数据包，故这种情况下，UE的LTE RLC层不向NR PDCP层上报数据包。但是和通常的方法不同的是，在本发明一种实施例中，在第一时刻所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第二组数据包(数据包2、5)之后，在第三时刻，当所述UE的LTE RLC层重组成功(数据包3、4重组成功，即重组为一个数据包)之后，所述UE的LTE RLC层会向所述UE的NR PDCP层上报重组成功后的第四组数据包(第四组数据包即数据包3、4重组后得到的一个数据包)；可选地，也可以在第四组数据包参与和其他数据包的重排序完成后，一并上报已排序的数据 包，例如一起上报数据包2、第四组数据包(由数据包3、4重组后得到)、5。需要说明的是，数据包3、4重组(Reassemble)成功后，即重组为一个数据包后，需要参与和其他的数据包之间的重排序(Reorder)。
基于前述实施方式，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包之后，所述UE的NR PDCP层对所述第四组数据包和所述第二组数据包进行重复检测处理。根据该实施方式，可以删除所述第四组数据包和所述第二组数据包中重复的数据包。
例如，若第四组数据包包括数据包2、3、4、5，第二组数据包包括2、5，则重复检测处理后删除两者中重复的数据包2、5。
又例如，若第四组数据包包括数据包3、4，第二组数据包包括2、3、5，则重复检测处理后删除两者中重复的数据包3。
第二种情况，在EN-DC Split模式下，当UE的NR PDCP层的重排序定时器超时，获得UE的LTE RLC层重排序定时器状态；等待UE的LTE RLC层的重排序定时器超时，即UE的LTE RLC层的重排序过程结束之后，UE的LTE RLC层上报已经排序好的数据包给UE的NR PDCP层。其中，上述UE的LTE RLC层重排序定时器状态可以但不限于为所述UE的LTE RLC层的重排序定时器的时长信息。该时长信息用于标识重排序定时器的剩余时间长度。
在一种可能的实施方式中，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第二消息，所述第二消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE的LTE RLC层根据所述第二消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE的NR PDCP层根据所述时长信息延长所述UE的NR PDCP层的重排序定时器的时长(例如，所述UE的NR PDCP层延长的时间长度大于或等于所述时长信息所标识的时间长度)，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第二组数据包。根据该实施方式，通过延长所述UE的NR PDCP层的重排序定时器的时长的方式，可以实现NR PDCP层的数据包的延时上报，并且不改变LTE RLC层的重排序过程。
基于前述实施方式，所述UE的NR PDCP层根据所述时长信息延长所述UE的NR PDCP层的重排序定时器的时长之前，所述UE的NR PDCP层确定所述时长信息所指示的时长小于或等于所述UE的NR PDCP层的重排序定时器的可延长的时长。根据该实施方式，考虑到了NR PDCP层的重排序定时器的可延长的时长，避免对时效性要求高的业务产生影响。
在一个示例中，所述UE的NR PDCP层可以根据上层应用的类型来确定所述UE的NR PDCP层的重排序定时器的可延长的时长。可以理解的是，比如游戏类应用对时效性要求较高，相应地，所述UE的NR PDCP层的重排序定时器的可延长的时长就较小；比如视频类应用对时效性要求较低，相应地，所述UE的NR PDCP层的重排序定时器的可延长的时长就较大。
在一种可能的实施方式中，当所述UE的NR PDCP层的重排序定时器超时之后，所 述UE的NR PDCP层向所述UE的LTE RLC层发送第二消息，所述第二消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE的LTE RLC层根据所述第二消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE的NR PDCP层确定所述时长信息所指示的时长大于所述UE的NR PDCP层的重排序定时器的可延长的时长，所述UE的NR PDCP层向所述UE的LTE RLC层发送第三消息，所述第三消息用于指示所述UE的LTE RLC层立即上报已排序的数据包，所述UE的LTE RLC层根据所述第三消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包。根据该实施方式，考虑到了NR PDCP层的重排序定时器的可延长的时长，当NR PDCP层的重排序定时器的可延长的时长不满足需求时，采用通知LTE RLC层立即上报已排序数据包的方案，避免对时效性要求高的业务产生影响。
基于前述实施方式，所述UE的LTE RLC层根据所述第三消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包。根据该实施方式，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包，能够保证上报数据的完整性。
基于前述实施方式，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包之后，所述UE的NR PDCP层对所述第四组数据包和所述第二组数据包进行重复检测处理。根据该实施方式，可以删除所述第四组数据包和所述第二组数据包中重复的数据包。
第三种情况，在EN-DC Split模式下，当UE的NR PDCP层的重排序定时器超时，获得UE的LTE RLC层确认模式(acknowledged mode，AM)模式数据包重组状态；UE的NR PDCP层延时等待UE的LTE RLC层重组数据包的上报。
在一种可能的实施方式中，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第四消息，所述第四消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的AM模式数据包重组状态，所述UE的LTE RLC层根据所述第四消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的AM模式数据包重组状态，所述UE的NR PDCP层根据所述重组状态延长所述UE的NR PDCP层的重排序定时器的时长，当所述UE的LTE RLC层AM模式数据包重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第二组数据包。根据该实施方式，通过延长所述UE的NR PDCP层的重排序定时器的时长的方式，可以实现NR PDCP层的数据包的延时上报，并且不改变LTE RLC层的重组过程。
基于前述实施方式，所述UE的NR PDCP层根据所述重组状态延长所述UE的NR PDCP层的重排序定时器的时长之前，所述UE的NR PDCP层确定所述重组状态所指示的所述UE的LTE RLC层的AM模式数据包的重组还需时间小于或等于所述UE的NR PDCP 层的重排序定时器的可延长的时长。根据该实施方式，考虑到了NR PDCP层的重排序定时器的可延长的时长，避免对时效性要求高的业务产生影响。
在一个示例中，为了准确估计所述UE的LTE RLC层的AM模式数据包的重组还需时间，所述UE的NR PDCP层除了获取所述UE的LTE RLC层的AM模式数据包重组状态之外，还可以获取所述UE的LTE RLC层的AM模式数据包接收状态(例如缺少的数据包数量)，从而更准确的估计所述UE的LTE RLC层的AM模式数据包的重组还需时间。
在一种可能的实施方式中，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第四消息，所述第四消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的AM模式数据包重组状态，所述UE的LTE RLC层根据所述第四消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的AM模式数据包重组状态，所述UE的NR PDCP层确定所述重组状态所指示的所述UE的LTE RLC层的AM模式数据包的重组还需时间大于所述UE的NR PDCP层的重排序定时器的可延长的时长，所述UE的NR PDCP层向所述UE的LTE RLC层发送第五消息，所述第五消息用于指示所述UE的LTE RLC层立即上报已排序的数据包，所述UE的LTE RLC层根据所述第五消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包。根据该实施方式，考虑到了NR PDCP层的重排序定时器的可延长的时长，当NR PDCP层的重排序定时器的可延长的时长不满足需求时，采用通知LTE RLC层立即上报已排序数据包的方案，避免对时效性要求高的业务产生影响。
基于前述实施方式，所述UE的LTE RLC层根据所述第五消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包。根据该实施方式，当所述UE的LTE RLC层重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包，能够保证上报数据的完整性。
基于前述实施方式，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包之后，所述UE的NR PDCP层对所述第四组数据包和所述第二组数据包进行重复检测处理。根据该实施方式，可以删除所述第四组数据包和所述第二组数据包中重复的数据包。
最后在步骤404，所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层。可以理解的是，所述UE的NR PDCP层可以先对所述第一组数据包和所述第二组数据包进行重复检测处理，删除所述第一组数据包和所述第二组数据包之中重复的数据包；然后所述UE的NR PDCP层对重复检测处理后的所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层。根据该实施方式，可以删除所述第一组数据包和所述第二组数据包中重复的数据包。
本发明实施例，UE在EN-DC的Split承载方式下，所述UE的LTE RLC层从LTE接入网接收下行分组数据，所述UE的NR RLC层从NR接入网接收下行分组数据；当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层得到已排序的第 一组数据包，所述UE的NR PDCP层不是直接上报已排序的第一组数据包，而是在所述UE的NR PDCP层从所述UE的LTERLC层接收已排序的第二组数据包之后，所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，再将所述第三组数据包发送给所述UE的高层，从而避免NR PDCP层在接收到第二组数据包之后，第一组数据包已经上报，第二组数据包不在NR PDCP层接收窗口内，导致丢包，因此能够保证下行链路的完整接收。
需要说明的是，前述实施例中提到的第一消息的作用也可以理解为用于指示所述UE的NR PDCP层的重排序定时器超时。
下面结合不同的场景来介绍本发明实施例提供的下行数据的接收方法。
场景一：UE的某个数据无线承载(Data Radio Bearer，DRB)被网络配置为Split承载方式,并且UE同时在MeNB和SgNB两条路径上接收该DRB的下行数据。在数据接收过程中，NR PDCP发生重排序，重排序定时器超时；同时LTE RLC开启重排序定时器，等待定时器超时或者重排序成功上报数据包，导致一部分数据包没有及时传给NR PDCP层。NR PDCP重排序后上报数据包给应用的数据处理模块，同时调整接收滑动窗口。LTERLC重排序的数据包到达NR PDCP时，数据包的PDCP序号不在滑动窗口接收范围，NR PDCP丢弃该数据包，导致丢包。
针对场景一出现的丢包的问题，本发明实施例中提出了如下的改进方案。
图6为本发明实施例提供的另一种下行数据的接收方法通信示意图，该实施例可以基于图1所示的EN-DC的网络架构以及图2所示的UE的协议栈架构，执行主体为UE，主要涉及UE的NR PDCP层(简称UE NR PDCP)、UE的NR RLC层(简称UE NR RLC)、UE的LTE RLC层(简称UE LTERLC)、NR接入网(简称NR)和LTE接入网(简称LTE)，该实施例中在EN-DC Split承载下，当NR PDCP重排序定时器超时，通知LTE的RLC层，LTE RLC层正在重排序，LTE RLC层上报已经排序好的数据包给PDCP。NR PDCP重排序之后再把数据发送给应用的数据处理模块，该方法包括：
步骤601，NR网络发送数据包给终端，终端的NR RLC层收到数据包之后进行重组和透传等操作。
步骤602，NR RLC上报数据包给NR PDCP层。
终端的NRPDCP层收到终端的NR RLC层或者终端的LTE RLC层上传的数据包,进行重排序和重复检测等操作，上报数据包给UE的高层(如，应用的数据处理模块)。
步骤603，终端的NR PDCP层发现接收的数据包产生乱序，PDCP序号异常，开启重排序定时器(即T-reordering定时器)，在接收窗口中，对接收的数据包进行重排序。
步骤604，LTE RLC收到网络数据包后，发现是乱序数据包。需要对数据包进行重排序，开启重排序定时器，等待后续的数据包进行排序。
步骤605，NR PDCP层的重排序定时器超时，NR PDCP层通知LTE RLC上传已排序数据包。
LTE RLC收到通知时，LTE RLC的重排序定时器已运行了一段时间，该段时间可记为T-reordering_1。LTE RLC收到通知之后保持原有的重排序流程不变。
步骤606，LTE RLC层传递已经排序的数据包给NR PDCP层。同时继续运行重排序定时器，继续进行重排序。
步骤607，NR PDCP对从LTERLC和NR RLC层接收的数据包进行重排序，发送给应用侧的数据处理模块。
步骤608，LTE RLC层收到网络侧数据包，重排序成功，LTE RLC组成完整有序的数据包发送给NR PDCP；或者LTE RLC的重排序定时器超时，LTE RLC将排序后的数据包发送给NR PDCP。LTE RLC的重排序定时器的时长可记为T-reordering_1加上T-reordering_2。
步骤609，LTE RLC缓存的重排序数据包都上传给NR PDCP，NR PDCP会进行重复检测处理,丢弃已经处理的数据包，上报数据包给应用的数据处理模块。
本发明实施例，UE在NR PDCP进行重排序，LTE RLC同时进行重排序，NR PDCP重排序定时器超时，通知LTE RLC上报已经排序的数据包，NR PDCP上报接收窗口的已排序数据包。在通过EN-DC传输数据的过程中，当NRPDCP重排序定时器超时，减少了LTE RLC重排序导致的丢包。
图7为本发明实施例提供的另一种下行数据的接收方法通信示意图，该实施例可以基于图1所示的EN-DC的网络架构以及图2所示的UE的协议栈架构，执行主体为UE，主要涉及UE的NR PDCP层(简称UE NR PDCP)、UE的NR RLC层(简称UE NR RLC)、UE的LTE RLC层(简称UE LTERLC)、NR接入网(简称NR)和LTE接入网(简称LTE)，该实施例中在EN-DC Split承载下，当NR PDCP重排序定时器超时，获得LTE的RLC层重排序定时器状态；NR PDCP等待RLC重排序定时器超时，重排序过程结束，RLC上报已经排序好的数据包给NR PDCP。NR PDCP重排序之后再把数据发送给应用侧数据处理模块，该方法包括：
步骤701，NR网络发送数据包给终端，终端的NR RLC层收到数据包之后进行重组和透传等操作。
步骤702，终端的NR RLC层上报数据包给终端的NR PDCP层。
终端的NRPDCP层收到终端的NR RLC层或者终端的LTE RLC层上传的数据包,进行重排序和重复检测等操作，上报数据包给应用的数据处理模块。
步骤703，NR PDCP发现接收的数据包产生乱序，SN序号异常，开启重排序定时器，在接收窗口中，对接收的数据包进行重排序。
步骤704，LTE RLC收到网络数据包后，发现是乱序数据包。需要对数据包进行重排序，开启重排序定时器，等待后续的数据包进行排序。
步骤705，NR PDCP重排序定时器超时，NR PDCP层通知LTE RLC上报当前RLC的状态。
步骤706，NR PDCP获得当前LTE RLC定时器的长度进行评估，延长重排序定时器。如果该定时器可延长的时长小于RLC重排序定时器继续运行的时长，则接下来可采用类似图6所示实施例的方案，即接下来可执行图6中的步骤605-609；反之，如果该定时器可延长的时长大于或等于LTERLC层重排序定时器继续运行的时长，则等待LTE RLC进行重排序结果。
步骤707，UE的LTE RLC层收到网络侧的数据包，重排序成功，或者UE的LTE RLC层的重排序定时器超时，UE的LTERLC层组成有序的数据包发送给NR PDCP。
步骤708，UE的LTE RLC缓存的重排序数据包都上传给UE的NR PDCP层。
步骤709，UE的NR PDCP层会进行重排序和重复检测处理,上报重排序后的数据包给应用的数据处理模块。
本发明实施例，UE在NR PDCP进行重排序，LTE RLC同时进行重排序，NR PDCP重排序定时器超时，通知LTE RLC上报重排序状态，NR PDCP延时等待LTE RLC上报排序数据包之后，再上传从NR RLC和LTE RLC接收的重排序数据包。在通过EN-DC传输数据的过程中，当NRPDCP重排序定时器超时，减少了LTE RLC重排序导致的丢包。
针对场景一，本发明的另一个实施例中，在EN-DC Split承载下，UE关闭UE的LTE RLC的重排序功能，UE的LTE RLC重组和透传数据包给NR PDCP。UE的NR PDCP对从UE的NR RLC和UE的LTE RLC接收的数据进行重排序，重排序之后，UE的NR PDCP上报排序后的数据包给UE的高层(如，应用侧的数据处理模块)。
在一种可能的实施方式中，预先配置所述UE的LTE RLC层的重排序功能关闭。这种方式简单、容易实现。
在一种可能的实施方式中，当所述UE的NR PDCP层开启重排序定时器时，关闭所述UE的LTE RLC层的重排序功能。这种方式能够避免NR PDCP层和LTE RLC层同时进行重排序，但不影响NR PDCP层未进行重排序时LTE RLC层的重排序，能够提高数据处理效率。
在一种可能的实施方式中，所述UE接收无线资源控制(Radio Resource Control，RRC)消息；根据所述RRC消息，关闭所述UE的LTE RLC层的重排序功能。这种方式能够提高网络侧对UE的控制，可以由网络侧根据资源调度情况灵活控制关闭所述UE的LTE RLC层的重排序功能。
本发明实施例，关闭LTE RLC的重排序功能，NR PDCP对从NR RLC和LTE RLC接收的数据进行重排序。在通过EN-DC传输数据的过程中，当NRPDCP重排序定时器超时，减少了LTE RLC重排序导致的丢包。
场景二：UE的某个DRB被网络配置为Split承载,并且UE同时在MeNB和SgNB两条路径上接收该DRB的下行数据。在数据接收过程中，NR PDCP发生重排序，重排序定时器超时；同时LTE RLC进行重组流程，导致一部分数据包没有及时传给NR PDCP层。NR PDCP重排序后上报数据包给应用的数据处理模块，同时调整接收滑动窗口。LTERLC重组的数据包到达NR PDCP时，数据报的PDCP序号不在滑动窗口接收范围，NR PDCP丢弃该数据包，导致丢包。
针对场景二出现的丢包的问题，本发明实施例中提出了如下的改进方案。
图8为本发明实施例提供的另一种下行数据的接收方法通信示意图，该实施例可以基于图1所示的EN-DC的网络架构以及图2所示的UE的协议栈架构，执行主体为UE，主要涉及UE的NR PDCP层(简称UE NR PDCP)、UE的NR RLC层(简称UE NR RLC)、UE的LTE RLC层(简称UE LTERLC)、NR接入网(简称NR)和LTE接入网(简称LTE)，该实施例中在EN-DC Split承载下，当NR PDCP重排序定时器超时，通知LTE的RLC层，LTE RLC层正在重组，LTE RLC层上报已排序的数据包给PDCP。NR PDCP重排序之后再把数据发送给应用的数据处理模块，该方法包括：
步骤801，NR网络发送数据包给终端，终端的NR RLC层收到数据包之后进行重组和透传等操作。
步骤802，NR RLC上报数据包给NR PDCP层。
终端的NRPDCP层收到终端的NR RLC层或者终端的LTE RLC层上传的数据包,进行重排序和重复检测等操作，上报数据包给UE的高层(如，应用的数据处理模块)。
步骤803，终端的NR PDCP层发现接收的数据包产生乱序，PDCP序号异常，开启重排序定时器(即T-reordering定时器)，在接收窗口中，对接收的数据包进行重排序。
步骤804，LTE RLC收到网络数据包后，发现需要对数据包进行重组，等待后续的数据包进行重组。
步骤805，NR PDCP层的重排序定时器超时，NR PDCP层通知LTE RLC上传已排序的数据包。LTE RLC收到通知时，LTE RLC的重组已进行了一段时间，该段时间可记为T1，LTE RLC收到通知之后保持原有的重组流程不变。
步骤806，LTE RLC层传递已排序的数据包给NR PDCP层。同时继续进行重组。
步骤807，NR PDCP对从LTERLC和NR RLC层接收的数据包进行重排序，发送给应用侧的数据处理模块。
步骤808，LTE RLC层收到网络侧数据包，重组成功，重组的整个过程需要的时间可记为T1+T2，LTE RLC组成完整有序的数据包发送给NR PDCP。
步骤809，LTE RLC缓存的重组成功后的数据包都上传给NR PDCP，NR PDCP会进行重复检测处理,丢弃已经处理的数据包，上报数据包给应用的数据处理模块。
本发明实施例，UE在NR PDCP进行重排序，LTE RLC同时进行重组，NR PDCP重排序定时器超时，通知LTE RLC上报已排序的数据包，NR PDCP上报接收窗口的已排序数据包。在通过EN-DC传输数据的过程中，当NRPDCP重排序定时器超时，减少了LTE RLC重组导致的丢包。
图9为本发明实施例提供的另一种下行数据的接收方法通信示意图，该实施例可以基于图1所示的EN-DC的网络架构以及图2所示的UE的协议栈架构，执行主体为UE，主要涉及UE的NR PDCP层(简称UE NR PDCP)、UE的NR RLC层(简称UE NR RLC)、UE的LTE RLC层(简称UE LTERLC)、NR接入网(简称NR)和LTE接入网(简称LTE)，该实施例中在EN-DC Split承载下，当NR PDCP重排序定时器超时，获得LTE的RLC层数据包重组状态；NR PDCP延时等待LTE RLC上报重组成功后的数据包(可简称为重组数据包)。NR PDCP重排序定时器超时，或者LTERLC上报重组成功后的数据包之后；NR PDCP再把数据发送给高层，该方法包括：
步骤901，NR网络发送数据包给终端，终端的NR RLC层收到数据包之后进行重组和透传等操作。
步骤902，NR RLC上报数据包给NR PDCP层。
终端的NRPDCP层收到终端的NR RLC层或者终端的LTE RLC层上传的数据包,进行重排序和重复检测等操作，上报数据包给应用的数据处理模块。
步骤903，NR PDCP发现接收的数据包产生乱序，SN序号异常，开启重排序定时器，在接收窗口中，对接收的数据包进行重排序。
步骤904，LTE RLC收到网络数据包后，发现需要对数据包进行重组，等待后续的数据包进行重组。
步骤905，NR PDCP重排序定时器超时，NR PDCP层通知LTE RLC上报当前RLC 的AM模式数据包重组状态，此时LTE RLC重组的时间可记为T1。
步骤906，NR PDCP获得当前LTE RLC的AM模式数据包重组状态进行评估，延长重排序定时器。如果该定时器可延长的时长小于RLC重组继续进行的时长，则接下来可采用类似图8所示实施例的方案，即接下来可执行图8中的步骤805-809；反之，如果该定时器可延长的时长大于或等于LTERLC层重组继续进行的时长，则等待LTE RLC进行重组结果。
步骤907，UE的LTE RLC层收到网络侧的数据包，重组成功，LTE RLC整个重组的时间可记为T1+T2，UE的LTERLC层将重组成功后的数据包发送给NR PDCP。
步骤908，UE的LTE RLC缓存的重组成功后的数据包都上传给UE的NR PDCP层。
步骤909，UE的NR PDCP层会进行重排序和重复检测处理,上报重排序后的数据包给应用的数据处理模块。
本发明实施例，UE在NR PDCP进行重排序，LTE RLC同时进行重组，NR PDCP重排序定时器超时，通知LTE RLC上报重组状态，NR PDCP延时等待LTE RLC上报重组数据包之后，再上传从NR RLC和LTE RLC接收的数据包。在通过EN-DC传输数据的过程中，当NRPDCP重排序定时器超时，减少了LTE RLC重组导致的丢包。
上述主要从方法流程的角度对本发明实施例的方案进行了介绍。可以理解的是，各个网元，例如UE等为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，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，本发明能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，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发明的范围。
本发明实施例可以根据上述方法示例对UE等进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本发明实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用集成的模块的情况下，图10示出了上述实施例中所涉及的UE的一种可能的结构示意图。UE1000包括：处理模块1002、第一通信模块1003和第二通信模块1004。处理模块1002用于对UE的动作进行控制管理，例如，处理模块1002用于支持UE执行图4至图9中的过程，和/或用于本文所描述的技术的其它过程。第一通信模块1003用于支持UE采用4G技术与其他网络实体的通信，例如与基站之间的通信。第二通信模块1004用于支持UE采用5G技术与其他网络实体的通信，例如与基站之间的通信。终端还可以包括存储模块1001，用于存储UE的程序代码和数据。
本发明的一个实施例中，第一通信模块1003，用于在EN-DC的Split承载方式下，所述UE的LTE RLC层通过所述第一通信模块1003从LTE接入网接收下行分组数据；
第二通信模块1004，用于所述UE的NR RLC层通过所述第二通信模块1004从NR接入网接收下行分组数据；
所述处理模块1002，用于控制所述UE的NRPDCP层和所述UE的LTERLC层执行 如下操作：当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层得到已排序的第一组数据包；以及，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包；所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层。
在一个示例中，所述处理模块1002用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：所述处理模块902用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层向所述UE的LTE RLC层发送第一消息，所述第一消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层发送已排序的数据包，控制所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包。
基于前述示例，所述处理模块1002，还用于在所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，控制所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包。
基于前述示例，所述处理模块1002，还用于在所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包之后，控制所述UE的NR PDCP层对所述第四组数据包和所述第二组数据包进行重复检测处理。
在另一个示例中，所述处理模块1002用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：所述处理模块902用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层向所述UE的LTE RLC层发送第一消息，所述第一消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层发送已排序的数据包，控制所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包。
基于前述示例，所述处理模块1002，还用于在所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重组成功之后，控制所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包。
基于前述示例，所述处理模块1002，还用于在所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包之后，控制所述UE的NR PDCP层对所述第四组数据包和所述第二组数据包进行重复检测处理。
在另一个示例中，所述处理模块1002用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：所述处理模块1002用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层向所述UE的LTE RLC层发送第二消息，所述第二消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排 序定时器还有多久超时的时长信息，控制所述UE的LTE RLC层根据所述第二消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，控制所述UE的NR PDCP层根据所述时长信息延长所述UE的NR PDCP层的重排序定时器的时长，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，控制所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第二组数据包。
基于前述示例，所述处理模块1002，还用于在所述UE的NR PDCP层根据所述时长信息延长所述UE的NR PDCP层的重排序定时器的时长之前，控制所述UE的NR PDCP层确定所述时长信息所指示的时长小于或等于所述UE的NR PDCP层的重排序定时器的可延长的时长。
在另一个示例中，所述处理模块1002用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：所述处理模块1002用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层向所述UE的LTE RLC层发送第二消息，所述第二消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，控制所述UE的LTE RLC层根据所述第二消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，控制所述UE的NR PDCP层确定所述时长信息所指示的时长大于所述UE的NR PDCP层的重排序定时器的可延长的时长，所述UE的NR PDCP层向所述UE的LTE RLC层发送第三消息，所述第三消息用于指示所述UE的LTE RLC层立即上报已排序的数据包，控制所述UE的LTE RLC层根据所述第三消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包。
基于前述示例，所述处理模块1002，还用于在所述UE的LTE RLC层根据所述第三消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，控制所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包。
在另一个示例中，所述处理模块1002用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：所述处理模块1002用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层向所述UE的LTE RLC层发送第四消息，所述第四消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的确认AM模式数据包重组状态，控制所述UE的LTE RLC层根据所述第四消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的AM模式数据包重组状态，控制所述UE的NR PDCP层根据所述重组状态延长所述UE的NR PDCP层的重排序定时器的时长，当所述UE的LTE RLC层AM模式数据包重组成功之后，控制所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第二组数据包。
基于前述示例，所述处理模块1002，还用于在所述UE的NR PDCP层根据所述重组 状态延长所述UE的NR PDCP层的重排序定时器的时长之前，控制所述UE的NR PDCP层确定所述重组状态所指示的所述UE的LTE RLC层的AM模式数据包的重组还需时间小于或等于所述UE的NR PDCP层的重排序定时器的可延长的时长。
在另一个示例中，所述处理模块1002用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：所述处理模块1002用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层向所述UE的LTE RLC层发送第四消息，所述第四消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的确认AM模式数据包重组状态，控制所述UE的LTE RLC层根据所述第四消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的AM模式数据包重组状态，控制所述UE的NR PDCP层确定所述重组状态所指示的所述UE的LTE RLC层的AM模式数据包的重组还需时间大于所述UE的NR PDCP层的重排序定时器的可延长的时长，所述UE的NR PDCP层向所述UE的LTE RLC层发送第五消息，所述第五消息用于指示所述UE的LTE RLC层立即上报已排序的数据包，控制所述UE的LTE RLC层根据所述第五消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包。
基于前述示例，所述处理模块1002，还用于在所述UE的LTE RLC层根据所述第五消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重组成功之后，控制所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包。
基于前述示例，所述处理模块1002，还用于在所述UE的LTE RLC层向所述UE的NR PDCP层上报第四组数据包之后，控制所述UE的NR PDCP层对所述第四组数据包和所述第二组数据包进行重复检测处理。
基于前述示例，所述处理模块1002用于控制所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层，包括：所述处理模块1002用于控制所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重复检测处理，删除所述第一组数据包和所述第二组数据包之中重复的数据包；控制所述UE的NR PDCP层对重复检测处理后的所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层。
本发明实施例，处理模块1002用于UE在EN-DC的Split承载方式下，所述UE的LTE RLC层通过第一通信模块1003从LTE接入网接收下行分组数据，所述UE的NR RLC层通过第二通信模块1004从NR接入网接收下行分组数据；当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层得到已排序的第一组数据包，所述UE的NR PDCP层不是直接上报已排序的第一组数据包，而是在所述UE的NR PDCP层从所述UE的LTERLC层接收已排序的第二组数据包之后，所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，再将所述第三组数据包发送给所述UE的高层，从而避免所述UE的NR PDCP层在接收到第二组数据包之后，第一组数据包已经上报，第二组数据包不在NR PDCP层的接收窗口内，导致丢包，因此能够保证下行链路的完整接收。
本发明的另一个实施例中，所述第一通信模块1003，用于在EN-DC的Split承载方式下，所述UE的LTE RLC层通过所述第一通信模块1003从LTE接入网接收下行分组数据；
所述第二通信模块1004，用于所述UE的NR RLC层通过所述第二通信模块1004从NR接入网接收下行分组数据；
所述处理模块1002，用于控制所述UE的LTE RLC层的重排序功能关闭，重排序功能由所述UE的NRPDCP层完成。
在一个示例中，所述处理模块1002用于控制所述UE的LTE RLC层的重排序功能关闭，包括：所述处理模块1002用于预先配置所述UE的LTE RLC层的重排序功能关闭。
在另一个示例中，所述处理模块1002用于控制所述UE的LTE RLC层的重排序功能关闭，包括：所述处理模块1002用于当所述UE的NR PDCP层开启重排序定时器时，关闭所述UE的LTE RLC层的重排序功能。
在另一个示例中，所述第一通信模块1003或所述第二通信模块1004，还用于接收RRC消息；
所述处理模块1002用于控制所述UE的LTE RLC层的重排序功能关闭，包括：所述处理模块1002用于根据所述RRC消息，关闭所述UE的LTE RLC层的重排序功能。
可以理解的是，第一通信模块1003用于实现4G通信功能，第二通信模块1004用于实现5G通信功能。
本发明实施例，处理模块1002用于控制所述UE的LTE RLC层的重排序功能关闭，重排序功能由所述UE的NR PDCP层完成，从而避免了NR PDCP层和LTE RLC层同时进行重排序所导致的丢包，因此能够保证下行链路的完整接收。
其中，处理模块1002可以是处理器或控制器。第一通信模块1003和第二通信模块1004可以是通信接口、收发器、收发电路等，其中，通信接口是统称，可以包括一个或多个接口。存储模块1001可以是存储器。
图11为本申请实施例提供的一种UE结构示意图，以所述UE为手机为例，图11示出的是与本发明实施例相关的手机1100的部分结构的框图。参考图11，手机1100包括：射频(Radio Frequency，RF)电路1110、射频电路1111、存储器1120、输入单元1130、显示屏1140、传感器1150、音频电路1160、WiFi(wireless fidelity，无线保真)模块1170、处理器1180、以及电源1190等部件。本领域技术人员可以理解，图11中示出的手机结构并不构成对手机的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
下面结合图11对手机1100的各个构成部件进行具体的介绍：
可以理解的是，为了支持EN-DC组网方式，UE可以具有两个RF电路分别用于支持不同的通信方式，例如图中的RF电路1110用于支持4G通信方式，即接收4G信号，RF电路1111用于支持5G通信方式，即接收5G信号.
RF电路1110和RF电路1111可用于收发信息或通话过程中，信号的接收和发送，特别地，将基站的下行信息接收后，给处理器1180处理；另外，将设计上行的数据发送给基站。通常，RF电路包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器(Low Noise Amplifier，LNA)、双工器等。此外，RF电路1110和RF电路1111 还可以通过无线通信与网络和其他设备通信。所述无线通信可以使用任一通信标准或协议，包括但不限于全球移动通讯系统(Global System for Mobile Communications，GSM)、通用分组无线服务(General Packet Radio Service，GPRS)、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、长期演进(Long Term Evolution，LTE)系统、电子邮件、短消息服务(Short Message Service，SMS)等。
存储器1120可用于存储软件程序以及模块，处理器1180通过运行存储在存储器1120的软件程序以及模块，从而执行手机1100的各种功能应用以及数据处理。存储器1120可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图象播放功能等)等；存储数据区可存储根据手机1100的使用所创建的数据(比如音频数据、电话本等)等。此外，存储器1120可以包括易失性存储器，例如非挥发性动态随机存取内存(Nonvolatile Random Access Memory，NVRAM)、相变化随机存取内存(Phase Change RAM，PRAM)、磁阻式随机存取内存(Magetoresistive RAM，MRAM)等；存储器1120还可以包括非易失性存储器，例如至少一个磁盘存储器件、电子可擦除可编程只读存储器(Electrically Erasable Programmable Read-Only Memory，EEPROM)、闪存器件，例如反或闪存(NOR flash memory)或是反与闪存(NAND flash memory)、半导体器件，例如固态硬盘(Solid State Disk，SSD)等。所述存储器1120还可以包括上述种类的存储器的组合。
输入单元1130可用于接收输入的数字或字符信息，以及产生与手机1100的用户设置以及功能控制有关的键信号输入。具体地，输入单元1130可包括触控面板1131以及其他输入设备1132。触控面板1131，也称为触摸屏，可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触控面板1131上或在触控面板1131附近的操作)，并根据预先设定的程式驱动相应的连接装置。可选的，触控面板1131可包括触摸检测装置和触摸控制器两个部分。其中，触摸检测装置检测用户的触摸方位，并检测触摸操作带来的信号，将信号传送给触摸控制器；触摸控制器从触摸检测装置上接收触摸信息，并将它转换成触点坐标，再送给处理器1180，并能接收处理器1180发来的命令并加以执行。此外，输入单元1130可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触控面板1131。除了触控面板1131，输入单元1130还可以包括其他输入设备1132。具体地，其他输入设备1132可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆等中的一种或多种。
显示屏1140可用于显示由用户输入的信息或提供给用户的信息以及手机1100的各种菜单。显示屏1140可包括显示面板1141，可选的，可以采用液晶显示器(Liquid Crystal Display，LCD)、有机发光二极管(Organic Light-Emitting Diode，OLED)等形式来配置显示面板1141。进一步的，触控面板1131可覆盖显示面板1141，当触控面板1131检测到在其上或附近的触摸操作后，传送给处理器1180以确定触摸事件的类型，随后处理器1180根据触摸事件的类型在显示面板1141上提供相应的视觉输出。虽然在图11中，触控面板1131与显示面板1141是作为两个独立的部件来实现手机1100的输入和输入功能，但是在某些实施例中，可以将触控面板1131与显示面板1141集成而实现手机1100的输入和输出功能。显示屏1140可用于显示内容，所述内容包括用户界面，比如终端的开机界面， 应用程序的用户界面。所述内容除了用户界面，还可以包括信息和数据。显示屏1140可以是终端的内置屏幕或者其他外部显示设备。
手机1100还可包括至少一种传感器1150，比如光传感器、运动传感器、位置传感器以及其他传感器。具体地，光传感器可包括环境光传感器及接近传感器，其中，环境光传感器可以获取周围环境光线的亮度，根据环境光线的明暗来调节显示面板1141的亮度，接近传感器可在手机1100移动到耳边时，关闭显示面板1141和/或背光。运动传感器包括加速度传感器，加速度传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别手机姿态的应用(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等。位置传感器可用于获取终端的地理位置坐标，所述地理位置坐标可通过全球定位系统(Global Positioning System，GPS)、北斗系统(COMPASS System)、格洛纳斯系统(GLONASS System)和伽利略系统(GALILEO System)等获取。位置传感器还可以通过移动运营网络的基站、以及Wi-Fi或蓝牙等局域网络进行定位，或者综合使用上述定位方式，从而获得更精确的手机位置信息。至于手机1100还可配置的陀螺仪、气压计、湿度计、温度计、红外线传感器等其他传感器，在此不再赘述。
音频电路1160、扬声器1161和麦克风1162(也称传声器)可提供用户与手机1100之间的音频接口。音频电路1160可将接收到的音频数据转换后的电信号，传输到扬声器1161，由扬声器1161转换为声音信号输出；另一方面，麦克风1162将收集的声音信号转换为电信号，由音频电路1160接收后转换为音频数据，再将音频数据输出处理器1080处理后，经RF电路1110或RF电路1111以发送给比如另一手机，或者将音频数据输出至存储器1120以便进一步处理。
WiFi属于短距离无线传输技术，手机1100通过WiFi模块1170可以帮助用户收发电子邮件、浏览网页和访问流式媒体等，它为用户提供了无线的宽带互联网访问。虽然图11示出了WiFi模块1170，但是可以理解的是，其并不属于手机1100的必须构成，完全可以根据需要在不改变发明的本质的范围内而省略。
处理器1180是手机1100的控制中心，利用各种接口和线路连接整个手机的各个部分，通过运行或执行存储在存储器1120内的软件程序和/或模块，以及调用存储在存储器1120内的数据，执行手机1100的各种功能和处理数据，从而对手机进行整体监控。处理器1180可以是中央处理器(central processing unit，CPU)、通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。处理器1180可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。处理器1180也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等。可选的，处理器1180可包括一个或多个处理器单元。可选的，处理器1180还可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器1180中。
手机1100还包括给各个部件供电的电源1190(比如电池)，优选的，电源可以通过 电源管理系统与处理器1180逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
需要说明的是，尽管未示出，手机1100还可以包括摄像头、蓝牙模块等，在此不予赘述。
在本发明一个实施例中，
所述存储器1120，用于存储程序指令；
所述处理器1180，用于根据所述存储器1120中存储的程序指令使得所述UE执行以下操作：
UE在EN-DC的分离Split承载方式下，所述UE的LTE RLC层通过RF电路1010从LTE接入网接收下行分组数据，所述UE的NR RLC层通过RF电路1011从NR接入网接收下行分组数据；
当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层得到已排序的第一组数据包；以及，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包；
所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层。
在一个示例中，所述处理器1180执行所述当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：
当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第一消息，所述第一消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层发送已排序的数据包，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包。
基于前述示例，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包之后，所述处理器1180还用于根据所述存储器1120中存储的程序指令使得所述UE执行以下操作：
当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包。
在另一个示例中，所述处理器1180执行所述当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：
当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第一消息，所述第一消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层发送已排序的数据包，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包。
基于前述示例，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包之后，所述处理器1180 还用于根据所述存储器1120中存储的程序指令使得所述UE执行以下操作：
当所述UE的LTE RLC层重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包。
在另一个示例中，所述处理器1180执行所述当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：
当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第二消息，所述第二消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE的LTE RLC层根据所述第二消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE的NR PDCP层根据所述时长信息延长所述UE的NR PDCP层的重排序定时器的时长，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第二组数据包。
基于前述示例，所述UE的NR PDCP层根据所述时长信息延长所述UE的NR PDCP层的重排序定时器的时长之前，所述处理器1180还用于根据所述存储器1120中存储的程序指令使得所述UE执行以下操作：
所述UE的NR PDCP层确定所述时长信息所指示的时长小于或等于所述UE的NR PDCP层的重排序定时器的可延长的时长。
在另一个示例中，所述处理器1180执行所述当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：
当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第二消息，所述第二消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE的LTE RLC层根据所述第二消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE的NR PDCP层确定所述时长信息所指示的时长大于所述UE的NR PDCP层的重排序定时器的可延长的时长，所述UE的NR PDCP层向所述UE的LTE RLC层发送第三消息，所述第三消息用于指示所述UE的LTE RLC层立即上报已排序的数据包，所述UE的LTE RLC层根据所述第三消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包。
基于前述示例，所述UE的LTE RLC层根据所述第三消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包之后，所述处理器1180还用于根据所述存储器1120中存储的程序指令使得所述UE执行以下操作：
当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包。
在一个示例中，所述处理器1180执行所述当所述UE的NR PDCP层的重排序定时器 超时之后，所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：
当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第四消息，所述第四消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的确认AM模式数据包重组状态，所述UE的LTE RLC层根据所述第四消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的AM模式数据包重组状态，所述UE的NR PDCP层根据所述重组状态延长所述UE的NR PDCP层的重排序定时器的时长，当所述UE的LTE RLC层AM模式数据包重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第二组数据包。
基于前述示例，所述UE的NR PDCP层根据所述重组状态延长所述UE的NR PDCP层的重排序定时器的时长之前，所述处理器1180还用于根据所述存储器1120中存储的程序指令执行以下操作：
所述UE的NR PDCP层确定所述重组状态所指示的所述UE的LTE RLC层的AM模式数据包的重组还需时间小于或等于所述UE的NR PDCP层的重排序定时器的可延长的时长。
在一个示例中，所述处理器1180执行所述当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：
当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第四消息，所述第四消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的确认AM模式数据包重组状态，所述UE的LTE RLC层根据所述第四消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的AM模式数据包重组状态，所述UE的NR PDCP层确定所述重组状态所指示的所述UE的LTE RLC层的AM模式数据包的重组还需时间大于所述UE的NR PDCP层的重排序定时器的可延长的时长，所述UE的NR PDCP层向所述UE的LTE RLC层发送第五消息，所述第五消息用于指示所述UE的LTE RLC层立即上报已排序的数据包，所述UE的LTE RLC层根据所述第五消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包。
基于前述示例，所述UE的LTE RLC层根据所述第五消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包之后，所述处理器1180还用于根据所述存储器1120中存储的程序指令使得所述UE执行以下操作：
当所述UE的LTE RLC层重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包。
基于前述示例，所述UE的LTE RLC层向所述UE的NR PDCP层上报第四组数据包之后，所述处理器1180还用于根据所述存储器1120中存储的程序指令使得所述UE执行以下操作：
所述UE的NR PDCP层对所述第四组数据包和所述第二组数据包进行重复检测处理。
在一个示例中，所述处理器1180执行所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的 高层，包括：
所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重复检测处理，删除所述第一组数据包和所述第二组数据包之中重复的数据包；
所述UE的NR PDCP层对重复检测处理后的所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层。
本发明实施例，处理器1180用于UE在EN-DC的Split承载方式下，所述UE的LTE RLC层通过RF电路1110从LTE接入网接收下行分组数据，所述UE的NR RLC层通过RF电路1111从NR接入网接收下行分组数据；当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层得到已排序的第一组数据包，所述UE的NR PDCP层不是直接上报已排序的第一组数据包，而是在所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包之后，所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，再将所述第三组数据包发送给所述UE的高层，从而避免在接收到第二组数据包之后，第一组数据包已经上报，第二组数据包不在NR PDCP层的接收窗口内，导致丢包，因此能够保证下行链路的完整接收。
在本发明另一个实施例中，
所述存储器1120，用于存储程序指令；
所述处理器1180，用于根据所述存储器1120中存储的程序指令使得所述UE执行以下操作：
UE在EN-DC的Split承载方式下，所述UE的LTE RLC层从LTE接入网接收下行分组数据，所述UE的NR RLC层从NR接入网接收下行分组数据；其中，所述UE的LTE RLC层的重排序功能关闭，重排序功能由所述UE的NR PDCP层完成。
在一个示例中，所述处理器1180执行所述UE的LTE RLC层的重排序功能关闭，包括：
预先配置所述UE的LTE RLC层的重排序功能关闭。
在另一个示例中，所述处理器1180执行所述UE的LTE RLC层的重排序功能关闭，包括：
当所述UE的NR PDCP层开启重排序定时器时，关闭所述UE的LTE RLC层的重排序功能。
在另一个示例中，所述处理器1180执行所述UE的LTE RLC层的重排序功能关闭，包括：
所述UE接收RRC消息；
根据所述RRC消息，关闭所述UE的LTE RLC层的重排序功能。
本发明实施例，处理器1180用于控制所述UE的LTE RLC层的重排序功能关闭，重排序功能由所述UE的NR PDCP层完成，从而避免了NR PDCP层和LTE RLC层同时进行重排序所导致的丢包，因此能够保证下行链路的完整接收。
图12为本申请实施例提供的一种通信装置示意图，如图12所示，所述通信装置1200可以是芯片，所述芯片包括处理单元和通信单元。所述处理单元可以是处理器1210，所述处理器可以是前文所述的各种类型的处理器。所述通信单元例如可以是输入/输出接口1220、管脚或电路等，所述通信单元可以包括系统总线或者与系统总线连接。可选地，所述通信 装置还包括存储单元，所述存储单元可以是所述芯片内部的存储器1230，例如寄存器、缓存、随机存取存储器(random access memory，RAM)、EEPROM或者FLASH等；所述存储单元还可以是位于所述芯片外部的存储器，该存储器可以是前文所述的各种类型的存储器。处理器连接到存储器，该处理器可以运行存储器存储的指令，以使该通信装置执行上述图4至图9所示的方法。
在上述各个本发明实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读介质向另一个计算机可读介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如，固态硬盘)等。
以上所述的具体实施方式，对本发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的具体实施方式而已，并不用于限定本发明的保护范围，凡在本发明的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本发明的保护范围之内。

Claims (43)

  1. 一种下行数据的接收方法，其特征在于，所述方法包括：
    终端设备UE在第四代移动通信技术4G-第五代移动通信技术5G无线接入的双连接EN-DC的分离Split承载方式下，所述UE的长期演进LTE无线链路控制RLC层从LTE接入网接收下行分组数据，所述UE的新无线NR RLC层从NR接入网接收下行分组数据；
    当所述UE的NR分组数据汇聚协议PDCP层的重排序定时器超时之后，所述UE的NR PDCP层得到已排序的第一组数据包；以及，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTERLC层接收已排序的第二组数据包；
    所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层。
  2. 如权利要求1所述的方法，其特征在于，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：
    当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第一消息，所述第一消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层发送已排序的数据包，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包。
  3. 如权利要求2所述的方法，其特征在于，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包之后，所述方法还包括：
    当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包。
  4. 如权利要求1所述的方法，其特征在于，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：
    当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第一消息，所述第一消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层发送已排序的数据包，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包。
  5. 如权利要求4所述的方法，其特征在于，所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包之后，所述方法还包括：
    当所述UE的LTE RLC层重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包。
  6. 如权利要求1所述的方法，其特征在于，当所述UE的NR PDCP层的重排序定时 器超时之后，所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：
    当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第二消息，所述第二消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE的LTE RLC层根据所述第二消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE的NR PDCP层根据所述时长信息延长所述UE的NR PDCP层的重排序定时器的时长，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第二组数据包。
  7. 如权利要求6所述的方法，其特征在于，所述UE的NR PDCP层根据所述时长信息延长所述UE的NR PDCP层的重排序定时器的时长之前，所述方法还包括：
    所述UE的NR PDCP层确定所述时长信息所指示的时长小于或等于所述UE的NR PDCP层的重排序定时器的可延长的时长。
  8. 如权利要求1所述的方法，其特征在于，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：
    当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第二消息，所述第二消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE的LTE RLC层根据所述第二消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，所述UE的NR PDCP层确定所述时长信息所指示的时长大于所述UE的NR PDCP层的重排序定时器的可延长的时长，所述UE的NR PDCP层向所述UE的LTE RLC层发送第三消息，所述第三消息用于指示所述UE的LTE RLC层立即上报已排序的数据包，所述UE的LTE RLC层根据所述第三消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包。
  9. 如权利要求8所述的方法，其特征在于，所述UE的LTE RLC层根据所述第三消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包之后，所述方法还包括：
    当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包。
  10. 如权利要求1所述的方法，其特征在于，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：
    当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第四消息，所述第四消息用于指示所述UE的LTE RLC层向所述 UE的NR PDCP层上报所述UE的LTE RLC层的确认AM模式数据包重组状态，所述UE的LTE RLC层根据所述第四消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的AM模式数据包重组状态，所述UE的NR PDCP层根据所述重组状态延长所述UE的NR PDCP层的重排序定时器的时长，当所述UE的LTE RLC层AM模式数据包重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第二组数据包。
  11. 如权利要求10所述的方法，其特征在于，所述UE的NR PDCP层根据所述重组状态延长所述UE的NR PDCP层的重排序定时器的时长之前，所述方法还包括：
    所述UE的NR PDCP层确定所述重组状态所指示的所述UE的LTE RLC层的AM模式数据包的重组还需时间小于或等于所述UE的NR PDCP层的重排序定时器的可延长的时长。
  12. 如权利要求1所述的方法，其特征在于，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：
    当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层向所述UE的LTE RLC层发送第四消息，所述第四消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的确认AM模式数据包重组状态，所述UE的LTE RLC层根据所述第四消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的AM模式数据包重组状态，所述UE的NR PDCP层确定所述重组状态所指示的所述UE的LTE RLC层的AM模式数据包的重组还需时间大于所述UE的NR PDCP层的重排序定时器的可延长的时长，所述UE的NR PDCP层向所述UE的LTE RLC层发送第五消息，所述第五消息用于指示所述UE的LTE RLC层立即上报已排序的数据包，所述UE的LTE RLC层根据所述第五消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包。
  13. 如权利要求12所述的方法，其特征在于，所述UE的LTE RLC层根据所述第五消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包之后，所述方法还包括：
    当所述UE的LTE RLC层重组成功之后，所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包。
  14. 如权利要求3、5、9、13中任一项所述的方法，其特征在于，所述UE的LTE RLC层向所述UE的NR PDCP层上报第四组数据包之后，所述方法还包括：
    所述UE的NR PDCP层对所述第四组数据包和所述第二组数据包进行重复检测处理。
  15. 如权利要求1所述的方法，其特征在于，所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层，包括：
    所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重复检测处理，删除所述第一组数据包和所述第二组数据包之中重复的数据包；
    所述UE的NR PDCP层对重复检测处理后的所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层。
  16. 一种下行数据的接收方法，其特征在于，所述方法包括：
    终端设备UE在第四代移动通信技术4G-第五代移动通信技术5G无线接入的双连接EN-DC的分离Split承载方式下，所述UE的长期演进LTE无线链路控制RLC层从LTE接入网接收下行分组数据，所述UE的新无线NR RLC层从NR接入网接收下行分组数据；其中，所述UE的LTE RLC层的重排序功能关闭，重排序功能由所述UE的NR分组数据汇聚协议PDCP层完成。
  17. 如权利要求16所述的方法，其特征在于，所述UE的LTE RLC层的重排序功能关闭，包括：
    预先配置所述UE的LTE RLC层的重排序功能关闭。
  18. 如权利要求16所述的方法，其特征在于，所述UE的LTE RLC层的重排序功能关闭，包括：
    当所述UE的NR PDCP层开启重排序定时器时，关闭所述UE的LTE RLC层的重排序功能。
  19. 如权利要求16所述的方法，其特征在于，所述UE的LTE RLC层的重排序功能关闭，包括：
    所述UE接收无线资源控制RRC消息；
    根据所述RRC消息，关闭所述UE的LTE RLC层的重排序功能。
  20. 一种终端设备UE，其特征在于，所述UE包括：第一通信模块、第二通信模块和处理模块；
    所述第一通信模块，用于在第四代移动通信技术4G-第五代移动通信技术5G无线接入的双连接EN-DC的分离Split承载方式下，所述UE的长期演进LTE无线链路控制RLC层通过所述第一通信模块从LTE接入网接收下行分组数据；
    所述第二通信模块，用于所述UE的新无线NR RLC层通过所述第二通信模块从NR接入网接收下行分组数据；
    所述处理模块，用于控制所述UE的NR分组数据汇聚协议PDCP层和所述UE的LTERLC层执行如下操作：当所述UE的NR分组数据汇聚协议PDCP层的重排序定时器超时之后，所述UE的NR PDCP层得到已排序的第一组数据包；以及，当所述UE的NR PDCP层的重排序定时器超时之后，所述UE的NR PDCP层从所述UE的LTERLC层接收已排序的第二组数据包；所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层。
  21. 如权利要求20所述的UE，其特征在于，所述处理模块用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：所述处理模块用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层向所述UE的LTE RLC层发送第一消息，所述第一消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层发送已排序的数据包， 控制所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包。
  22. 如权利要求21所述的UE，其特征在于，所述处理模块，还用于在所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，控制所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包。
  23. 如权利要求20所述的UE，其特征在于，所述处理模块用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：所述处理模块用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层向所述UE的LTE RLC层发送第一消息，所述第一消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层发送已排序的数据包，控制所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包。
  24. 如权利要求23所述的UE，其特征在于，所述处理模块，还用于在所述UE的LTE RLC层根据所述第一消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重组成功之后，控制所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包。
  25. 如权利要求20所述的UE，其特征在于，所述处理模块用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：所述处理模块用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层向所述UE的LTE RLC层发送第二消息，所述第二消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，控制所述UE的LTE RLC层根据所述第二消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，控制所述UE的NR PDCP层根据所述时长信息延长所述UE的NR PDCP层的重排序定时器的时长，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，控制所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第二组数据包。
  26. 如权利要求25所述的UE，其特征在于，所述处理模块，还用于在所述UE的NR PDCP层根据所述时长信息延长所述UE的NR PDCP层的重排序定时器的时长之前，控制所述UE的NR PDCP层确定所述时长信息所指示的时长小于或等于所述UE的NR PDCP层的重排序定时器的可延长的时长。
  27. 如权利要求20所述的UE，其特征在于，所述处理模块用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层从所述UE的LTE RLC层接收 已排序的第二组数据包，包括：所述处理模块用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层向所述UE的LTE RLC层发送第二消息，所述第二消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，控制所述UE的LTE RLC层根据所述第二消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的重排序定时器还有多久超时的时长信息，控制所述UE的NR PDCP层确定所述时长信息所指示的时长大于所述UE的NR PDCP层的重排序定时器的可延长的时长，所述UE的NR PDCP层向所述UE的LTE RLC层发送第三消息，所述第三消息用于指示所述UE的LTE RLC层立即上报已排序的数据包，控制所述UE的LTE RLC层根据所述第三消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包。
  28. 如权利要求27所述的UE，其特征在于，所述处理模块，还用于在所述UE的LTE RLC层根据所述第三消息不等所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重排序成功或者所述UE的LTE RLC层的重排序定时器超时之后，控制所述UE的LTE RLC层向所述UE的NR PDCP层上报已排序的第四组数据包。
  29. 如权利要求20所述的UE，其特征在于，所述处理模块用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：所述处理模块用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层向所述UE的LTE RLC层发送第四消息，所述第四消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的确认AM模式数据包重组状态，控制所述UE的LTE RLC层根据所述第四消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的AM模式数据包重组状态，控制所述UE的NR PDCP层根据所述重组状态延长所述UE的NR PDCP层的重排序定时器的时长，当所述UE的LTE RLC层AM模式数据包重组成功之后，控制所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第二组数据包。
  30. 如权利要求29所述的UE，其特征在于，所述处理模块，还用于在所述UE的NR PDCP层根据所述重组状态延长所述UE的NR PDCP层的重排序定时器的时长之前，控制所述UE的NR PDCP层确定所述重组状态所指示的所述UE的LTE RLC层的AM模式数据包的重组还需时间小于或等于所述UE的NR PDCP层的重排序定时器的可延长的时长。
  31. 如权利要求20所述的UE，其特征在于，所述处理模块用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层从所述UE的LTE RLC层接收已排序的第二组数据包，包括：所述处理模块用于当所述UE的NR PDCP层的重排序定时器超时之后，控制所述UE的NR PDCP层向所述UE的LTE RLC层发送第四消息，所述第四消息用于指示所述UE的LTE RLC层向所述UE的NR PDCP层上报所述UE的LTE RLC层的确认AM模式数据包重组状态，控制所述UE的LTE RLC层根据所述第四消息向所述UE的NR PDCP层上报所述UE的LTE RLC层的AM模式数据包重组状态，控制 所述UE的NR PDCP层确定所述重组状态所指示的所述UE的LTE RLC层的AM模式数据包的重组还需时间大于所述UE的NR PDCP层的重排序定时器的可延长的时长，所述UE的NR PDCP层向所述UE的LTE RLC层发送第五消息，所述第五消息用于指示所述UE的LTE RLC层立即上报已排序的数据包，控制所述UE的LTE RLC层根据所述第五消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包。
  32. 如权利要求31所述的UE，其特征在于，所述处理模块，还用于在所述UE的LTE RLC层根据所述第五消息不等所述UE的LTE RLC层重组成功就向所述UE的NR PDCP层上报已排序的第二组数据包之后，当所述UE的LTE RLC层重组成功之后，控制所述UE的LTE RLC层向所述UE的NR PDCP层上报重组成功后的第四组数据包。
  33. 如权利要求22、24、28、32中任一项所述的UE，其特征在于，所述处理模块，还用于在所述UE的LTE RLC层向所述UE的NR PDCP层上报第四组数据包之后，控制所述UE的NR PDCP层对所述第四组数据包和所述第二组数据包进行重复检测处理。
  34. 如权利要求20所述的UE，其特征在于，所述处理模块用于控制所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层，包括：所述处理模块用于控制所述UE的NR PDCP层对所述第一组数据包和所述第二组数据包进行重复检测处理，删除所述第一组数据包和所述第二组数据包之中重复的数据包；控制所述UE的NR PDCP层对重复检测处理后的所述第一组数据包和所述第二组数据包进行重排序得到第三组数据包，将所述第三组数据包发送给所述UE的高层。
  35. 一种终端设备UE，其特征在于，所述UE包括：第一通信模块、第二通信模块和处理模块；
    所述第一通信模块，用于在第四代移动通信技术4G-第五代移动通信技术5G无线接入的双连接EN-DC的分离Split承载方式下，所述UE的长期演进LTE无线链路控制RLC层通过所述第一通信模块从LTE接入网接收下行分组数据；
    所述第二通信模块，用于所述UE的新无线NR RLC层通过所述第二通信模块从NR接入网接收下行分组数据；
    所述处理模块，用于控制所述UE的LTE RLC层的重排序功能关闭，控制重排序功能由所述UE的NR分组数据汇聚协议PDCP层完成。
  36. 如权利要求35所述的UE，其特征在于，所述处理模块用于控制所述UE的LTE RLC层的重排序功能关闭，包括：所述处理模块用于预先配置所述UE的LTE RLC层的重排序功能关闭。
  37. 如权利要求35所述的UE，其特征在于，所述处理模块用于控制所述UE的LTE RLC层的重排序功能关闭，包括：所述处理模块用于当所述UE的NR PDCP层开启重排序定时器时，关闭所述UE的LTE RLC层的重排序功能。
  38. 如权利要求35所述的UE，其特征在于，所述第一通信模块或所述第二通信模块，还用于接收无线资源控制RRC消息；
    所述处理模块用于控制所述UE的LTE RLC层的重排序功能关闭，包括：所述处理模 块用于根据所述RRC消息，关闭所述UE的LTE RLC层的重排序功能。
  39. 一种终端设备UE，其特征在于，所述UE包括存储器和处理器；
    所述存储器，用于存储程序指令；
    所述处理器，用于根据所述存储器中存储的程序指令控制所述UE执行根据权利要求1至19任一项所述的方法。
  40. 一种计算机可读存储介质，包括指令，其特征在于，当所述指令在计算机上运行时，使所述计算机执行根据权利要求1至19任一项所述的方法。
  41. 一种计算机程序产品，其特征在于，当所述计算机程序产品被计算机读取并执行时，如权利要求1-19任一项所述的方法将被执行。
  42. 一种装置，应用于终端设备中，其特征在于，所述装置与存储器耦合，用于读取并执行所述存储器中存储的软件程序，使得所述终端设备实现如权利要求1-19任一项所述的方法。
  43. 如权利要求42所述的装置，其特征在于，所述装置为芯片或片上系统。
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