WO2020088611A1 - Procédé et appareil pour réinitialiser une couche mac, et procédé et appareil de transmission de données - Google Patents

Procédé et appareil pour réinitialiser une couche mac, et procédé et appareil de transmission de données Download PDF

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Publication number
WO2020088611A1
WO2020088611A1 PCT/CN2019/114841 CN2019114841W WO2020088611A1 WO 2020088611 A1 WO2020088611 A1 WO 2020088611A1 CN 2019114841 W CN2019114841 W CN 2019114841W WO 2020088611 A1 WO2020088611 A1 WO 2020088611A1
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WIPO (PCT)
Prior art keywords
terminal device
information
mac layer
communication device
radio bearer
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PCT/CN2019/114841
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English (en)
Chinese (zh)
Inventor
姚楚婷
曹振臻
徐海博
王键
李冠臣
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华为技术有限公司
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Publication of WO2020088611A1 publication Critical patent/WO2020088611A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment

Definitions

  • the present application relates to the field of communication technology, and in particular to a reset MAC layer, data transmission method and device.
  • the 5th generation mobile communication technology (the 5th generation, 5G)
  • LTE long term evolution
  • NR new wireless
  • the base station in the radio, NR system communicates with the terminal device together, that is, the terminal device can be simultaneously connected to the base station operating in the LTE system (hereinafter referred to as LTE base station) and the base station operating in the NR system (hereinafter referred to as NR base station), so that you can use both the frequency of the LTE system to transmit data and the frequency of the NR system to improve the throughput of the terminal equipment.
  • LTE base station the base station operating in the LTE system
  • NR base station the base station operating in the NR system
  • This scenario where the terminal device is connected to two base stations of different access technologies at the same time may be called multi-access technology dual connectivity (multi-RAT dual connectivity (MR-DC).
  • MR-DC multi-access technology dual connectivity
  • PDCP packet data convergence protocol
  • the PDCP layer is responsible for encrypting the data transmitted by the wireless bearer, and the key used by the PDCP layer is the key used by the base station, the relocation of the PDCP layer will cause the data packets sent by the base station. The key used has changed.
  • the main base station sends mobility control information (mobilitycontrolinfo) to the terminal device to instruct the terminal device to perform the PDCP layer Reestablishment, radio link control (RLC) layer reestablishment, and MAC layer reset.
  • mobility controlinfo mobility control information
  • RLC radio link control
  • the mobilitycontrolinfo sent by the base station to the terminal device will instruct the terminal device to rebuild all the PDCP layer and RLC layer corresponding to all radio bearers, which will cause all The transmission of wireless bearers are interrupted for a long time. If mobilitycontrolinfo is not sent, although the base station can separately instruct the reconstruction of the PDCP layer and the RLC layer, the base station cannot instruct the MAC layer to reset independently, and the terminal device cannot reset the MAC layer.
  • Embodiments of the present application provide a reset MAC layer, data transmission method and device, which are used to reduce transmission interruption time.
  • a first method for resetting the MAC layer includes: receiving a first message from a first network device, where the first message includes reset indication information, and the reset indication information is used to indicate Reset the MAC layer of the terminal device; reset the MAC layer.
  • the method may be executed by a first communication device.
  • the first communication device may be a terminal device or a communication device capable of supporting the functions required by the method by the terminal device, and of course, may be other communication devices, such as a chip system.
  • the first communication device is a terminal device.
  • the reset instruction information sent by the network device to the terminal device may be used to instruct to reset the MAC layer of the terminal device, so that the terminal device may be individually instructed to reset the MAC layer through the reset instruction information, thereby The device can reset the MAC layer to avoid decryption confusion caused by packets encrypted with the old key. And because the terminal device can be instructed to reset the MAC layer separately, the network device can instruct the terminal device to rebuild all PDCP layers and RLC layers corresponding to all wireless bearers without using mobilitycontrolinfo, which can effectively reduce the transmission interruption time and improve the communication quality. .
  • the reset indication information in the embodiment of the present application is newly added information in the first message, and is not mobilitycontrolinfo. Therefore, the network device may not instruct the terminal device through mobilitycontrolinfo to perform all PDCP and RLC layers corresponding to all radio bearers. Reconstruction can effectively reduce the time of transmission interruption and improve the communication quality.
  • the first message may also include mobilitycontrolinfo, but mobilitycontrolinfo no longer refers to instructing the terminal device to rebuild all PDCP layers and RLC layers corresponding to all radio bearers, but indicates configuration information for random access of the terminal device, so that the terminal The device does not need to rebuild the PDCP layer and RLC layer corresponding to all wireless bearers, which effectively reduces the transmission interruption time, and the terminal device can also perform random access according to the instructions of mobilitycontrolinfo.
  • the reset indication information is It is used to instruct to reset the MAC layer among the MAC layer, RLC layer and PDCP layer, but is not used to indicate whether to rebuild the RLC layer and PDCP layer.
  • the reset indication information in the embodiment of the present application is used to instruct to reset the MAC layer, and does not indicate to the RLC layer and the PDCP layer.
  • the first message further includes first reconstruction information and / or second reconstruction information, the first reconstruction information is used to instruct the terminal device to rebuild the PDCP layer corresponding to the first radio bearer, and the second The reconstruction information is used to instruct the terminal device to rebuild the RLC layer corresponding to the first radio bearer.
  • the PDCP layer corresponding to the first radio bearer has changed, including a bearer type change or handover, or only the PDCP layer has undergone a location change, for example, the newly established PDCP layer corresponding to the first radio bearer in the first network device, or The PDCP layer corresponding to the first radio bearer is newly established in the second network device, so it involves updating the key of the PDCP layer corresponding to the first radio bearer.
  • the PDCP layer and the RLC layer corresponding to the first radio bearer are rebuilt.
  • the first message may further include first reconstruction information and second reconstruction information.
  • the reset indication information is also used to instruct the terminal device to perform random access in the original serving cell of the terminal device; or, the first message further includes random access indication information, the random access The indication information is used to instruct the terminal device to perform random access in the original serving cell of the terminal device.
  • the reset indication information can instruct the terminal device to reset the MAC layer, and can also instruct the terminal device to perform random access in the original serving cell, and the terminal device can perform random access in the original serving cell according to the reset indication information.
  • the reset indication information can indicate both MAC reset and random access, which helps to save resources and improve information utilization. Or, instead of performing multiple indications through the reset indication information, but further indicating random access through additional random access indication information, this indication method can be indicated separately for MAC reset and random access, which is more flexible.
  • the first message is also used to indicate that the key used by the first radio bearer of the terminal device changes.
  • the MAC layer is a MAC layer corresponding to the LTE system or a MAC layer corresponding to the NR system.
  • a second method for resetting the MAC layer includes: generating a first message that is related to a change in the PDCP layer corresponding to the first radio bearer.
  • the first message includes a heavy Setting instruction information, the reset instruction information is used to instruct to reset the MAC layer of the terminal device; and send the first message to the terminal device.
  • the method may be performed by a second communication device, which may be a network device or a communication device capable of supporting the network device to achieve the functions required by the method, and of course may be other communication devices, such as a chip system.
  • a second communication device is a network device.
  • the change of the PDCP layer corresponding to the first radio bearer includes: configuring the first radio bearer to be configured in the first network device The corresponding PDCP layer is released, or a PDCP layer corresponding to the first radio bearer is established in the first network device.
  • the first message further includes The mobility control information is used to indicate configuration information used for random access by the terminal device.
  • the reset indication information is used to instruct to reset the MAC layer in the MAC layer, the RLC layer and the PDCP layer, but not used to indicate whether to rebuild the RLC layer and the PDCP layer.
  • the first message further includes first reconstruction information and / or second reconstruction information
  • the first reconstruction information is used to instruct the terminal device to rebuild the PDCP layer corresponding to the first radio bearer
  • the second The reconstruction information is used to instruct the terminal device to rebuild the RLC layer corresponding to the first radio bearer.
  • the reset indication information is also used to instruct the terminal device to perform random access in the original serving cell of the terminal device; or, the first message further includes random access indication information, the random access The indication information is used to instruct the terminal device to perform random access in the original serving cell of the terminal device.
  • the first message is also used to indicate that the key used by the first radio bearer of the terminal device changes.
  • the MAC layer is a MAC layer corresponding to the LTE system or a MAC layer corresponding to the NR system.
  • a first data transmission method includes: receiving a first message from a first network device, where the first message includes first information; and performing, based on the first information, on the MAC layer Processing, wherein part or all of the processing of the MAC layer is a true subset of the processing methods included in resetting the MAC layer, and the processing of the MAC layer includes at least one of the following: Clear the cache of all HARQ processes, stop the DRX retransmission timer, stop the RTT timer, and set NDI as a new transmission.
  • the method may be performed by a third communication device.
  • the third communication device may be a terminal device or a communication device capable of supporting the functions required by the method by the terminal device, and of course, may be other communication devices, such as a chip system.
  • the third communication device is a terminal device.
  • the processing method for resetting the MAC layer includes:
  • the next transmission block received is considered to be the first transmission
  • the reset indication information is information different from the mobility control information.
  • the reset indication information is Information different from uplink transmission enhanced configuration information, and information different from coverage enhanced mode information.
  • the first network device sends the first information to the terminal device when the PDCP layer changes or is about to change, regardless of the uplink transmission enhancement. In addition, in the embodiment of the present application, the first network device sends the first information to the terminal device when the PDCP layer changes or is about to change, regardless of coverage enhancement.
  • the first information is also used to instruct the MAC layer to perform the processing.
  • the first information may use an explicit indication method to directly instruct the MAC layer to perform the processing, so that the indication method is more clear.
  • the MAC layer is processed in such a manner that the MAC layer does not perform data retransmission.
  • the first message is also used to indicate that the key used by the first radio bearer of the terminal device changes.
  • the PDCP layer corresponding to the first radio bearer changes, for example, the PDCP layer corresponding to the first radio bearer is newly established in the first network device, or the PDCP layer corresponding to the first radio bearer is newly established in the second network device Therefore, it involves updating the key of the PDCP layer corresponding to the first radio bearer, then the first message may also be used to indicate that the key used by the first radio bearer has changed, for example, it is understood that the first message includes corresponding information, This information may be used to indicate that the key used by the first radio bearer has changed.
  • a second data transmission method includes: generating a first message related to a change in a PDCP layer corresponding to a first radio bearer, the first message including first information, The first information is used by the terminal device to process the MAC layer of the terminal device; send the first message to the terminal device; wherein, part or all of the MAC layer is processed.
  • the method is a true subset of the processing methods included in resetting the MAC layer, and the processing methods in the MAC layer include at least one of the following: clearing the cache of all HARQ processes, stopping the DRX retransmission timer, and stopping RTT timer, set NDI to new transmission.
  • the method may be performed by a fourth communication device.
  • the fourth communication device may be a network device or a communication device capable of supporting the functions required by the method by the network device, and of course, may be other communication devices, such as a chip system.
  • the fourth communication device is a network device.
  • the processing method for resetting the MAC layer includes:
  • the next transmission block received is considered to be the first transmission
  • the temporary user ID is released.
  • the reset indication information is Information different from uplink transmission enhanced configuration information, and information different from coverage enhanced mode information.
  • the change of the PDCP layer corresponding to the first radio bearer includes: releasing the PDCP layer corresponding to the first radio bearer configured in the first network device, or establishing a connection with the first in the first network device The PDCP layer corresponding to the wireless bearer.
  • the first information is also used to instruct the MAC layer to perform the processing.
  • the MAC layer is processed in such a manner that the MAC layer does not perform data retransmission.
  • the first message is also used to indicate that the key used by the first radio bearer of the terminal device changes.
  • a third data transmission method includes: releasing the PDCP layer corresponding to the first radio bearer configured in the first network device, or establishing a correspondence with the first radio bearer in the first network device PDCP layer; in the lower row, the terminal device schedules downlink new transmission data, and does not schedule downlink retransmission data for the terminal device in the downlink.
  • the first network device releases the PDCP layer corresponding to the first radio bearer configured in the first network device, or establishes a PDCP layer corresponding to the first radio bearer in the first network device, then for the first radio bearer, It may be that the first network device also stores the data encrypted with the old key of the first radio bearer in the HARQ cache of the MAC layer of the first network device. If the first network device acts as the terminal device to schedule downlink retransmission data, the retransmission data is likely to include data encrypted with the old key.
  • the first network device may schedule downlink new transmission data for the terminal device in the downlink, that is, do not schedule downlink retransmission data for the terminal device, and the new transmission data may be the first network device Generated by the new key encryption, so that the first network device sends the data encrypted with the new key as much as possible, and the data encrypted with the old key is no longer sent, so that the terminal device can correct the received data Decryption.
  • the method further includes: scheduling uplink new transmission data of the terminal device on the line, and not scheduling uplink retransmission for the terminal device on the uplink ⁇ ⁇ Transfer data.
  • the terminal device may also store the data encrypted with the old key of the first radio bearer in the HARQ cache of the MAC layer of the terminal device. If the first network device acts as the terminal device to schedule uplink retransmission data, the retransmission data is likely to include data encrypted with the old key.
  • the first network device may schedule uplink new transmission data for the terminal device in the uplink, instead of scheduling uplink retransmission data for the terminal device, and the new transmission data may be encrypted by the terminal device through a new key Generated, so that the terminal device sends out the data encrypted with the new key as much as possible, and the data encrypted with the old key is no longer sent, so that the first network device can correctly decrypt the received data.
  • the method further includes: scheduling uplink retransmission data of the terminal device on the line; receiving the uplink retransmission data; discarding the uplink
  • the data included in the retransmitted data belongs to the first radio bearer and is the data before releasing the PDCP layer corresponding to the first radio bearer configured in the first network device, or discards the uplink retransmission
  • the data included in the transmitted data belongs to the first radio bearer and is data before the PDCP layer corresponding to the first radio bearer is established in the first network device.
  • the terminal device sends data, it is possible that the data of multiple radio bearers is sent together in a transmission block. If the first network device does not schedule uplink retransmission, the data of other radio bearers may not be transmitted. Therefore, the first network device can still schedule the terminal device to transmit the uplink retransmission data.
  • a first communication device may, for example, realize the function of a terminal device, for example, the first communication device as described above.
  • the communication device may include a processor and a transceiver, such as a radio frequency processing component.
  • the transceiver is used to receive a first message from the first network device, the first message includes reset indication information, and the reset indication information is used to instruct to reset the MAC layer of the terminal device; , Used to reset the MAC layer.
  • the reset indication information is information different from mobility control information.
  • the first message further includes mobility control information, which is used to indicate Configuration information for random access by the terminal device.
  • the reset indication information is It is used to instruct to reset the MAC layer among the MAC layer, RLC layer and PDCP layer, but is not used to indicate whether to rebuild the RLC layer and PDCP layer.
  • the first message further includes first reconstruction information and / or second reconstruction information
  • the first reconstruction information is used to instruct the terminal device to rebuild the PDCP layer corresponding to the first radio bearer
  • the second The reconstruction information is used to instruct the terminal device to rebuild the RLC layer corresponding to the first radio bearer.
  • the reset indication information is also used to instruct the terminal device to perform random access in the original serving cell of the terminal device; or, the first message further includes random access indication information, the random access The indication information is used to instruct the terminal device to perform random access in the original serving cell of the terminal device.
  • the first message is also used to indicate that the key used by the first radio bearer of the terminal device changes.
  • the MAC layer is a MAC layer corresponding to the LTE system or a MAC layer corresponding to the NR system.
  • a second communication device may implement the function of a network device, for example, the second communication device as described above.
  • the communication device may include a processor and a transceiver, such as a radio frequency processing component.
  • the processor is configured to generate a first message related to the change of the PDCP layer corresponding to the first radio bearer, the first message includes reset indication information, and the reset indication information is used to Instructing to reset the MAC layer of the terminal device; the transceiver is used to send the first message to the terminal device.
  • the change of the PDCP layer corresponding to the first radio bearer includes: configuring the first radio bearer to be configured in the first network device The corresponding PDCP layer is released, or a PDCP layer corresponding to the first radio bearer is established in the first network device.
  • the reset indication information is information different from the mobility control information.
  • the first message further includes The mobility control information is used to indicate configuration information used for random access by the terminal device.
  • the first message further includes first reconstruction information and / or second reconstruction information, the first reconstruction information is used to instruct the terminal device to rebuild the PDCP layer corresponding to the first radio bearer, and the second The reconstruction information is used to instruct the terminal device to rebuild the RLC layer corresponding to the first radio bearer.
  • the first message is also used to indicate that the key used by the first radio bearer of the terminal device changes.
  • the transceiver is used to receive the first message from the first network device, the first message includes the first information; the processor is used to process the MAC layer according to the first information, wherein, Part or all of the processing of the MAC layer is a true subset of the processing methods included in resetting the MAC layer, and the processing of the MAC layer includes at least one of the following: clear all HARQ processes Cache, stop the DRX retransmission timer, stop the RTT timer, and set NDI as a new transmission.
  • the processing method for resetting the MAC layer includes:
  • the next transmission block received is considered to be the first transmission
  • the reset indication information is information different from mobility control information.
  • the reset indication information is Information different from uplink transmission enhanced configuration information, and information different from coverage enhanced mode information.
  • the first information is also used to instruct the MAC layer to perform the processing.
  • the first message is also used to indicate that the key used by the first radio bearer of the terminal device changes.
  • a fourth communication device can implement the function of a network device, for example, the fourth communication device as described above.
  • the communication device may include a processor and a transceiver, such as a radio frequency processing component.
  • the processor is configured to generate a first message related to the change of the PDCP layer corresponding to the first radio bearer, the first message includes first information, and the first information is used to
  • the terminal device processes the MAC layer of the terminal device; a transceiver is used to send the first message to the terminal device; wherein part or all of the processing of the MAC layer is A true subset of the processing methods included in the resetting of the MAC layer, and the processing methods of the MAC layer include at least one of the following: clearing the cache of all HARQ processes; stopping the DRX retransmission timer; stopping the RTT timer; Set NDI as a new pass.
  • the processing method for resetting the MAC layer includes:
  • the next transmission block received is considered to be the first transmission
  • the temporary user ID is released.
  • the reset indication information is information different from the mobility control information.
  • the reset indication information is Information different from uplink transmission enhanced configuration information, and information different from coverage enhanced mode information.
  • the change of the PDCP layer corresponding to the first radio bearer includes: releasing the PDCP layer corresponding to the first radio bearer configured in the first network device, or establishing a connection with the first in the first network device The PDCP layer corresponding to the wireless bearer.
  • the first information is also used to instruct the MAC layer to perform the processing.
  • the MAC layer is processed in such a manner that the MAC layer does not perform data retransmission.
  • a fifth communication device may implement the function of a terminal device, for example, the fifth communication device described above.
  • the communication device may include a processor and a transceiver, such as a radio frequency processing component.
  • the processor is used to release the PDCP layer corresponding to the first radio bearer configured in the first network device, or establish the PDCP layer corresponding to the first radio bearer in the first network device; the processor also uses In the following, the terminal device schedules downlink new transmission data, and does not schedule downlink retransmission data for the terminal device in the downlink.
  • the processor is further configured to: schedule the uplink new transmission data of the terminal device in the above manner, and do not schedule uplink retransmission for the terminal device in the uplink ⁇ ⁇ Transfer data.
  • the processor is further configured to schedule uplink retransmission data of the terminal device on the line; the transceiver is also configured to receive the uplink retransmission Data; the processor is also used to discard the PDCP included in the uplink retransmission data that belongs to the first radio bearer and that is to be configured in the first network device and corresponds to the first radio bearer The layer before releasing the data, or discarding what is included in the uplink retransmission data and belongs to the first radio bearer and before the PDCP layer corresponding to the first radio bearer is established in the first network device data.
  • a sixth communication device which can realize the function of a terminal device, for example, the first communication device as described above.
  • the communication device has the function of realizing the terminal device in the above method design. These functions can be realized by hardware, and can also be realized by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above functions.
  • the specific structure of the communication device may include a processing module and a transceiver module.
  • the processing module and the transceiver module can perform the corresponding functions in the method provided in the first aspect or any possible implementation manner of the first aspect.
  • the transceiver module is configured to receive a first message from the first network device, the first message includes reset indication information, and the reset indication information is used to instruct to reset the MAC layer of the terminal device; the processing module , Used to reset the MAC layer.
  • the reset indication information is information different from mobility control information.
  • the first message further includes mobility control information for indicating Configuration information for random access by the terminal device.
  • the heavy The setting indication information is used to instruct to reset the MAC layer among the MAC layer, the RLC layer and the PDCP layer, but not to indicate whether to rebuild the RLC layer and the PDCP layer.
  • the first message further includes first reconstruction information and / or second reconstruction information, and the first reconstruction information is used to instruct the terminal device to rebuild the PDCP layer corresponding to the first radio bearer,
  • the second reconstruction information is used to instruct the terminal device to rebuild the RLC layer corresponding to the first radio bearer.
  • the reset indication information is also used to instruct the terminal device to perform random access in the original serving cell of the terminal device; or, the first message further includes random access indication information.
  • the random access instruction information is used to instruct the terminal device to perform random access in the original serving cell of the terminal device.
  • the first message is also used to indicate that the key used by the first radio bearer of the terminal device changes.
  • the MAC layer is a MAC layer corresponding to the LTE system or a MAC layer corresponding to the NR system.
  • a seventh communication device is provided.
  • the communication device can implement the function of a network device, for example, the second communication device as described above.
  • the communication device has the function of implementing the network device in the above method design. These functions can be realized by hardware, and can also be realized by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above functions.
  • the specific structure of the communication device may include a processing module and a transceiver module. The processing module and the transceiver module may perform the corresponding functions in the method provided in the second aspect or any possible implementation manner of the second aspect.
  • the processing module is configured to generate a first message related to the change of the PDCP layer corresponding to the first radio bearer, the first message includes reset indication information, and the reset indication information is used to Instructing to reset the MAC layer of the terminal device; a transceiver module, configured to send the first message to the terminal device.
  • the change of the PDCP layer corresponding to the first radio bearer includes: configuring the first network device with the first The PDCP layer corresponding to the radio bearer is released, or the PDCP layer corresponding to the first radio bearer is established in the first network device.
  • the first The message also includes mobility control information for indicating configuration information used for random access by the terminal device.
  • the reset indication information is used to instruct to reset the MAC layer of the MAC layer, the RLC layer, and the PDCP layer, but not used to indicate whether to rebuild the RLC layer and the PDCP layer.
  • the first message further includes first reconstruction information and / or second reconstruction information, and the first reconstruction information is used to instruct the terminal device to rebuild the PDCP layer corresponding to the first radio bearer,
  • the second reconstruction information is used to instruct the terminal device to rebuild the RLC layer corresponding to the first radio bearer.
  • the reset indication information is also used to instruct the terminal device to perform random access in the original serving cell of the terminal device; or, the first message further includes random access indication information.
  • the random access instruction information is used to instruct the terminal device to perform random access in the original serving cell of the terminal device.
  • the first message is also used to indicate that the key used by the first radio bearer of the terminal device changes.
  • the MAC layer is a MAC layer corresponding to the LTE system or a MAC layer corresponding to the NR system.
  • an eighth communication device can implement the function of a terminal device, for example, the third communication device as described above.
  • the communication device has the function of realizing the terminal device in the above method design. These functions can be realized by hardware, and can also be realized by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above functions.
  • the specific structure of the communication device may include a processing module and a transceiver module. The processing module and the transceiver module can perform the corresponding functions in the method provided in the third aspect or any possible implementation manner of the third aspect.
  • the transceiving module is used to receive the first message from the first network device, the first message includes the first information; the processing module is used to process the MAC layer according to the first information, wherein, Part or all of the processing of the MAC layer is a true subset of the processing methods included in resetting the MAC layer, and the processing of the MAC layer includes at least one of the following: clear all HARQ processes Cache, stop the DRX retransmission timer, stop the RTT timer, and set NDI as a new transmission.
  • the processing method for resetting the MAC layer includes:
  • the next transmission block received is considered to be the first transmission
  • the temporary user ID is released.
  • the reset indication information is information different from mobility control information.
  • the heavy The setting indication information is information different from the uplink transmission enhancement configuration information, and information different from the coverage enhancement mode information.
  • the first message is also used to indicate that the key used by the first radio bearer of the terminal device changes.
  • a ninth communication device can realize the function of a network device, for example, the fourth communication device described above.
  • the communication device has the function of implementing the network device in the above method design. These functions can be realized by hardware, and can also be realized by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above functions.
  • the specific structure of the communication device may include a processing module and a transceiver module. The processing module and the transceiver module can perform the corresponding functions in the method provided in the fourth aspect or any possible implementation manner of the fourth aspect.
  • the next transmission block received is considered to be the first transmission
  • the reset The indication information is information different from the uplink transmission enhancement configuration information, and information different from the coverage enhancement mode information.
  • the change of the PDCP layer corresponding to the first radio bearer includes: releasing the PDCP layer corresponding to the first radio bearer configured in the first network device, or in the first network device Establish a PDCP layer corresponding to the first radio bearer.
  • the first information is also used to instruct the MAC layer to perform the processing.
  • the MAC layer is processed in such a manner that the MAC layer does not perform data retransmission.
  • the first message is also used to indicate that the key used by the first radio bearer of the terminal device changes.
  • a tenth communication device can implement the function of a terminal device, for example, the fifth communication device as described above.
  • the communication device has the function of realizing the terminal device in the above method design. These functions can be realized by hardware, and can also be realized by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above functions.
  • the specific structure of the communication device may include a processing module and a transceiver module. The processing module and the transceiver module can perform the corresponding functions in the method provided in the fourth aspect or any possible implementation manner of the fourth aspect.
  • the processing module is used to release the PDCP layer corresponding to the first radio bearer configured in the first network device, or to establish the PDCP layer corresponding to the first radio bearer in the first network device; the processing module also uses In the following, the terminal device schedules downlink new transmission data, and does not schedule downlink retransmission data for the terminal device in the downlink.
  • the processing module is further configured to: schedule the uplink new transmission data of the terminal device on the line, and do not schedule the terminal device on the uplink Uplink retransmission data.
  • an eleventh communication device may be the first communication device in the above method design, for example, a terminal device, or a chip provided in the terminal device.
  • the communication device includes: a memory for storing computer executable program code; and a processor coupled with the memory.
  • the program code stored in the memory includes instructions, and when the processor executes the instructions, the eleventh communication device is caused to execute the method in the first aspect or any possible implementation manner of the first aspect.
  • the eleventh communication device may further include a communication interface. If the eleventh communication device is a terminal device, the communication interface may be a transceiver in the terminal device, for example, a radio frequency transceiver component in the terminal device, or, if The eleventh communication device is a chip provided in a terminal device, and the communication interface may be an input / output interface of the chip, such as input / output pins.
  • a twelfth communication device may be the second communication device in the above method design, such as a network device, or a chip provided in the network device.
  • the communication device includes: a memory for storing computer executable program code; and a processor coupled with the memory.
  • the program code stored in the memory includes instructions, and when the processor executes the instructions, the twelfth communication device is caused to perform the method in the second aspect or any possible implementation manner of the second aspect.
  • the twelfth communication device may further include a communication interface.
  • the communication interface may be a transceiver in the network device, for example, a radio frequency transceiver component in the network device, or, if The twelfth communication device is a chip provided in a network device, and the communication interface may be an input / output interface of the chip, such as input / output pins.
  • a thirteenth communication device is provided.
  • the communication device may be the third communication device in the above method design, for example, a terminal device, or a chip provided in the terminal device.
  • the communication device includes: a memory for storing computer executable program code; and a processor coupled with the memory.
  • the program code stored in the memory includes instructions, and when the processor executes the instructions, the thirteenth communication device is caused to perform the method in the third aspect or any possible implementation manner of the third aspect.
  • the thirteenth communication device may also include a communication interface. If the thirteenth communication device is a terminal device, the communication interface may be a transceiver in the terminal device, for example, a radio frequency transceiver component in the terminal device, or, if The thirteenth communication device is a chip provided in the terminal device, and the communication interface may be an input / output interface of the chip, such as input / output pins.
  • a fourteenth communication device may be the fourth communication device in the above method design, such as a network device, or a chip provided in the network device.
  • the communication device includes: a memory for storing computer executable program code; and a processor coupled with the memory.
  • the program code stored in the memory includes instructions, and when the processor executes the instructions, the fourteenth communication device is caused to perform the method in the fourth aspect or any possible implementation manner of the fourth aspect.
  • the fourteenth communication device may further include a communication interface. If the fourteenth communication device is a terminal device, the communication interface may be a transceiver in the network device, for example, a radio frequency transceiver component in the network device, or, if The fourteenth communication device is a chip provided in a network device, and the communication interface may be an input / output interface of the chip, such as input / output pins.
  • a fifteenth communication device is provided.
  • the communication device may be the fifth communication device in the above method design, for example, a terminal device, or a chip provided in the terminal device.
  • the communication device includes: a memory for storing computer executable program code; and a processor coupled with the memory.
  • the program code stored in the memory includes instructions, and when the processor executes the instructions, the fifteenth communication device is caused to perform the method in the fifth aspect or any possible implementation manner of the fifth aspect.
  • the fifteenth communication device may further include a communication interface.
  • the communication interface may be a transceiver in the terminal device, for example, a radio frequency transceiver component in the terminal device, or, if The fifteenth communication device is a chip provided in a terminal device, and the communication interface may be an input / output interface of the chip, such as input / output pins.
  • a first communication system may include the first communication device according to the sixth aspect, the sixth communication device according to the eleventh aspect, or the communication device according to the sixteenth aspect An eleventh communication device and a second communication device according to the seventh aspect, a seventh communication device according to the twelfth aspect, or a twelfth communication device according to the seventeenth aspect.
  • a second communication system which may include the third communication device described in the eighth aspect, the eighth communication device described in the thirteenth aspect, or the eighteenth communication device described in the eighteenth aspect The thirteenth communication device, and the fourth communication device according to the ninth aspect, the ninth communication device according to the fourteenth aspect, or the fourteenth communication device according to the nineteenth aspect.
  • a computer storage medium in which instructions are stored in a computer-readable storage medium, which when executed on a computer, causes the computer to perform the first aspect or any one of the first aspect The method described in the design.
  • a computer storage medium in which instructions are stored in a computer-readable storage medium, which when executed on a computer, causes the computer to perform the second aspect or any one of the second aspect The method described in the design.
  • a computer storage medium stores instructions which, when run on a computer, cause the computer to perform the third aspect or any one of the third aspects. The method described in the design.
  • a computer storage medium in which instructions are stored in a computer-readable storage medium, which when executed on a computer, causes the computer to perform the fourth aspect or any one of the fourth aspects. The method described in the design.
  • a computer storage medium in which instructions are stored in a computer-readable storage medium, which when executed on a computer, causes the computer to perform the fifth aspect or any one of the fifth aspects The method described in the design.
  • a computer program product containing instructions, the computer program product has instructions stored therein, which when run on a computer, causes the computer to perform the first aspect or any one of the first aspects The method described in the design.
  • a computer program product containing instructions, where the computer program product stores instructions that, when run on a computer, cause the computer to perform the second aspect or any one of the second aspects The method described in the design.
  • a computer program product containing instructions, where the computer program product stores instructions, which when executed on a computer, causes the computer to perform the third aspect or any one of the third aspects The method described in the design.
  • a computer program product containing instructions, the computer program product storing instructions, which, when run on a computer, causes the computer to perform the fifth aspect or any one of the fifth aspects The method described in the design.
  • the reset instruction information sent by the network device to the terminal device may be used to instruct to reset the MAC layer of the terminal device, so that the terminal device may be individually instructed to reset the MAC layer through the reset instruction information, thereby The device can reset the MAC layer to avoid decryption confusion caused by packets encrypted with the old key.
  • Figure 1 is a schematic diagram of the protocol stack architecture of a terminal device in an EN-DC scenario
  • 2 is a schematic diagram of the protocol stack architecture of two base stations in an EN-DC scenario
  • 3 is a schematic diagram of base station and terminal equipment transmitting data through a protocol stack
  • 5A is a schematic diagram of an application scenario according to an embodiment of the present application.
  • 5B is a schematic diagram of another application scenario provided by an embodiment of this application.
  • FIG. 6 is a flowchart of a method for resetting a MAC layer provided by an embodiment of this application.
  • FIG. 7 is a flowchart of a data transmission method according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a communication device that can implement the functions of a terminal device according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a communication device that can implement the functions of a network device according to an embodiment of the present application
  • FIG. 12 is a schematic structural diagram of a communication device that can implement the functions of a network device according to an embodiment of the present application
  • 14A-14B are schematic diagrams of two structures of a communication device provided by an embodiment of the present application.
  • Terminal devices including devices that provide voice and / or data connectivity to users, for example, may include handheld devices with wireless connection capabilities, or processing devices connected to wireless modems.
  • the terminal device can communicate with the core network via a radio access network (RAN) and exchange voice and / or data with the RAN.
  • the terminal equipment may include user equipment (user equipment, UE), wireless terminal equipment, mobile terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), mobile station (mobile), remote Remote station, access point (AP), remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), or user Equipment (user device), etc.
  • a mobile phone or called a “cellular” phone
  • a computer with a mobile terminal device, a portable, pocket-sized, handheld, built-in or on-board mobile device, smart wearable device, and the like.
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistants
  • restricted devices such as devices with low power consumption, devices with limited storage capacity, or devices with limited computing power. Examples include bar code, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.
  • RFID radio frequency identification
  • GPS global positioning system
  • laser scanners and other information sensing equipment.
  • the terminal device may also be a vehicle-mounted terminal device or a wearable device.
  • Wearable devices can also be referred to as wearable smart devices. It is a general term for applying wearable technology to intelligently design everyday wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • Generalized wearable smart devices include full-featured, large-sized, complete or partial functions that do not depend on smartphones, such as: smart watches or smart glasses, and only focus on a certain type of application functions, and need to cooperate with other devices such as smartphones Use, such as all kinds of smart bracelets, smart helmets, smart jewelry for sign monitoring.
  • Network equipment for example, includes access network (AN) equipment, and access network equipment, such as base stations (for example, access points), can refer to the access network through one or more cells on the air interface.
  • Wireless terminal equipment communication equipment The network device can be used to convert received air frames and Internet Protocol (IP) packets to each other as a router between the terminal device and the rest of the access network, where the rest of the access network can include an IP network.
  • IP Internet Protocol
  • the network equipment can also coordinate attribute management of the air interface.
  • the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), or It can also include the next generation node B (gNB) in the 5G NR system, or it can also include the centralized unit (CU) and the centralized unit (CU) in the cloud access network (cloud radio access network, CloudRAN) system.
  • a distributed unit distributed unit, DU is not limited in the embodiments of the present application.
  • the network device may also include a core network device, where the core network device referred to in this article may correspond to different devices in different communication systems, for example, in the fourth generation mobile communication technology (the 4th generation, 4G) system, this article refers to
  • the core network equipment can be a mobility management entity (mobility management entity, MME), or other core network equipment.
  • MME mobility management entity
  • the core network equipment involved in this article can be access and mobility management functions (access and mobility management functions). management (function, AMF)), or other core network equipment.
  • the network devices mentioned below refer to access network devices.
  • MR-DC with the development of 5G, in the deployment of operators, you can configure the base station working in the LTE system and the base station working in the 5G NR system to communicate with the terminal equipment, that is, the terminal equipment can At the same time, it is connected to the LTE base station and the NR base station, so that both the frequency of the LTE system and the frequency of the NR system can be used to transmit data, thereby improving the throughput of the terminal device.
  • This scenario where the terminal device is connected to two base stations of different access technologies at the same time may be called MR-DC.
  • this scenario is specifically called LTE in MR-DC -NR dual connectivity (LTE-NR dual connectivity, EN-DC); if the NR base station is the primary base station, the E-UTRA base station is the secondary base station, and the NR base station is connected to the 5G core network, this scenario is specifically called NR in MR-DC -LTE dual connectivity (NR-LTE dual connectivity, NE-DC); if the E-UTRA base station is the primary base station, the NR base station is the secondary base station, and the E-UTRA base station is connected to the 5G core network, this scenario is specifically called MR-DC
  • NG E-UTRA-NR dual connectivity NGEN-DC
  • “Multiple” refers to two or more. In view of this, in the embodiments of the present application, “multiple” may also be understood as “at least two”, such as two, three, or more. "At least one”, such as one, two, three or more. "And / or” describes the association relationship of the associated objects, indicating that there may be three relationships, for example, A and / or B, which may indicate: there are three situations in which A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character “/”, unless otherwise specified, generally indicates that the related object is a "or" relationship.
  • the wireless bearer is similar to a pipe, and data can be transmitted to the terminal device through the wireless bearer.
  • MCG master cell group
  • SCG secondary cell group
  • split radio bearer split bearer
  • the protocol stack architecture of the terminal device can refer to FIG. 1. Because it is EN-DC, in Figure 1, the MCG radio bearer corresponds to the evolved universal mobile communication system terrestrial radio access technology (evolved-UMTS terrestrial radio access, E-UTRA) / NR PDCP, SCG radio bearer and separate radio
  • the bearers correspond to two NR PDCPs respectively.
  • the PDCP layer is connected to the corresponding RLC layer, and the RLC layer is connected to the MAC layer.
  • the terminal device has two MAC layers, which are a MAC layer corresponding to E-UTRA and a MAC layer corresponding to NR, and in some cases, the terminal device may have only one MAC layer.
  • FIG. 2 is a protocol stack architecture of two base stations in an EN-DC scenario, where a master node (MN) can be regarded as a master base station, and a secondary node (SN) can be regarded as a secondary base station.
  • MN master node
  • SN secondary node
  • the naming of the wireless bearer is based on the location of the air interface where the base station is connected to the terminal equipment.
  • the wireless bearer connected to the MN through the air interface and only connected to the MN is called MCG wireless bearer.
  • the wireless bearer is connected to the SN through the air interface and is only connected to the SN, which is called the SCG wireless bearer.
  • a wireless bearer connected to both MN and SN through an air interface is called a separate wireless bearer.
  • a radio bearer in the base station performs various processing such as encryption through the protocol stack at the PDCP layer, and sends it to the RLC layer connected to the PDCP layer in the base station for processing.
  • the layer is mapped to the transmission channel through the logical channel, and finally transmitted to the terminal device through the air interface.
  • the keys used by different base stations for encryption are different.
  • the MN key is called the primary key, such as K-eNB
  • the SN key is called the secondary key, such as S-K-gNB.
  • the base stations communicate through the X2 interface, for example.
  • the key of the PDCP layer of the terminal device may still change. For example, if the relocation of the PDCP layer occurs, and the PDCP layer corresponding to one or some radio bearers moves from MN to SN, or from SN to MN, then for the radio bearers whose position changes in the PDCP layer, the The key may be changed from the primary key to the secondary key, or from the secondary key to the primary key.
  • the terminal device needs to take corresponding actions to avoid sending the data encrypted with the old key to the base station, or to avoid handing over the data encrypted by the base station with the old key to the PDCP layer of the terminal device, resulting in the PDCP layer Decryption failed.
  • the PDCP layer moves from the MN to the SN. It can be understood that the PDCP layer is released in the MN and the PDCP layer is established in the SN.
  • the PDCP layer is also similar from the SN to the MN. It can be understood that it is in The PDCP layer is released in the SN, and the PDCP layer is established in the MN.
  • each transmission block When each transmission block is sent through the MAC layer, it is sent as new transmission data, and the corresponding hybrid automatic repeat request (HARQ) process is recorded.
  • HARQ hybrid automatic repeat request
  • the physical layer of the terminal device finds that a piece of data has been received as new transmission data, if the reception is successful, an acknowledgment (ACK) is fed back to the base station, and the data is handed over to the MAC layer of the terminal device, and if the reception fails, the feedback Negative acknowledgement (NACK) to the base station.
  • ACK acknowledgment
  • NACK feedback Negative acknowledgement
  • the base station After receiving ACK feedback, the base station will continue to schedule new data transmission, and after receiving NACK feedback, it will schedule retransmission data.
  • the terminal device will perform PDCP reconstruction, RLC reconstruction and MAC reset of all existing wireless bearers according to the instructions of mobilitycontrolinfo.
  • FIG. 4 it can be seen that only the PDCP layer corresponding to wireless bearer 3 moves from MN to SN, and For the radio bearer 1 and the radio bearer 2, the PDCP layer is unchanged, but the terminal device will also perform the PDCP layer reconstruction and the RLC layer reconstruction for the radio bearer 1 and the radio bearer 2, which is obviously unnecessary to increase the wireless
  • the time when the transmission of bearer 1 and radio bearer 2 is interrupted reduces the communication quality.
  • mobilitycontrolinfo is not sent, although the base station can separately instruct the reconstruction of the PDCP layer and the RLC layer, the base station cannot instruct the MAC layer to reset independently, and the terminal device cannot reset the MAC layer.
  • FIG. 5A is an application scenario of an embodiment of the present application.
  • 5A includes a network device and a terminal device, and the terminal device is connected to a network device.
  • the number of terminal devices in FIG. 5A is just an example.
  • the network device can provide services for multiple terminal devices, and all terminal devices or some terminal devices in the multiple terminal devices can use the ones provided in the embodiments of the present application.
  • Method to reset the MAC layer can be used to reset the MAC layer.
  • the network device in FIG. 5A is, for example, an access network device, such as a base station.
  • the access network device may be an eNB in a 4G system, or may be an enhanced eNB in a 5G system, or may be a gNB in a 5G system.
  • the core network part is not shown in FIG. 5A.
  • the core network may be a 4G core network in a 4G system or a 5G core network in a 5G system.
  • FIG. 5B is another application scenario of the embodiment of the present application.
  • the scenario shown in FIG. 5B can be understood as an MR-DC scenario.
  • 5B includes two network devices and a terminal device.
  • the two network devices are a first network device and a second network device.
  • the first network device is, for example, a main network device of the terminal device, and the second network device is a terminal.
  • the auxiliary network device of the device, or the first network device is the auxiliary network device of the terminal device, and the second network device is the main network device of the terminal device.
  • the two network devices are both access network devices, such as base stations, then the main network device is also the main base station, and the auxiliary network device is also the auxiliary base station.
  • the first network device works in an E-UTRA system
  • the second network device works in an NR system, that is, the first network device is an E-UTRA network device
  • the second network device is an NR network device, for example.
  • the first network device operates in an NR system
  • the second network device operates in an E-UTRA system, that is, the first network device is an NR network device
  • the second network device is an E-UTRA network, for example device.
  • the terminal device is connected to the two network devices at the same time, and the terminal device and the two network devices can communicate.
  • the scenario shown in FIG. 5B may be an EN-DC scenario, or a NGEN-DC scenario, or a NE-DC scenario, which is not specifically limited.
  • the network device in FIG. 5B is, for example, an access network device, such as a base station.
  • the access network device may be an eNB in a 4G system, or may be an enhanced eNB in a 5G system, or may be a gNB in a 5G system.
  • the core network part is not shown in FIG. 5B.
  • the core network may be a 4G core network in a 4G system or a 5G core network in a 5G system. If the first network device is the main network device, then the first network device is connected to the core network, and if the second network device is the main network device, then the second network device is connected to the core network.
  • An embodiment of the present application provides a method for resetting the MAC layer. Please refer to FIG. 6 for a flowchart of the method.
  • the method is applied to the network architecture shown in FIG. 5A or FIG. 5B as an example.
  • the method may be performed by two communication devices, such as a first communication device and a second communication device, where the first communication device may be a network device or a network device capable of supporting the functions required by the method Communication device, or the first communication device may be a terminal device or a communication device capable of supporting the function required by the method by the terminal device, and of course, may be other communication devices, such as a chip system. The same is true for the second communication device.
  • the method is performed by a network device and a terminal device as an example, that is, the first communication device is a network device and the second communication device is a terminal device as an example.
  • the network described below The device may be a network device in the network architecture shown in FIG. 5A, and the terminal device described below may be a terminal device in the network architecture shown in FIG. 5A.
  • the network device described below is, for example, the first network device in the network architecture shown in FIG. 5B, and the terminal device described below may be the terminal device in the network architecture shown in FIG. 5B.
  • the first network device is used for description.
  • the first network device generates a first message related to the change of the PDCP layer corresponding to the first radio bearer.
  • the first message includes reset indication information, and the reset indication information is used to indicate Reset the MAC layer of the terminal device;
  • the terminal device resets the MAC layer.
  • the first network device may send the first message to the terminal device.
  • the sequence between the movement of the PDCP layer and the sending of the first message is not limited.
  • the PDCP layer corresponding to the first radio bearer configured in the first network device is to be released, the corresponding one of the first radio bearers configured in the first network device may be released.
  • the first message is sent; and if the PDCP layer corresponding to the first radio bearer is to be established in the first network device, the PDCP layer corresponding to the first radio bearer may be established in the first network device Send the first message before, or send the first message while establishing the PDCP layer corresponding to the first radio bearer in the first network device, or send the first message after establishing the PDCP layer corresponding to the first radio bearer in the first network device A message.
  • the first message is an RRC connection reconfiguration message
  • the reset indication information included in the first message is information specifically provided to instruct to reset the MAC layer of the terminal device provided by the embodiment of the present application , Not mobilitycontrolinfo, that is to say, the reset instruction information is different from mobilitycontrolinfo.
  • Mobilitycontrolinfo can be understood as structural information, and the reset indication information provided by the embodiment of the present application is not structural information.
  • the terminal device needs to parse further information according to mobilitycontrolinfo, so as to determine the operation mode indicated by mobilitycontrolinfo, and the reset instruction information directly instructs to reset the MAC layer, and the terminal device can clearly specify the reset instruction information. Reset the MAC layer without parsing further information.
  • the network device will send an RRC connection reconfiguration message carrying mobilitycontrolinfo to the terminal device, while for the MAC layer corresponding to NR in the terminal device, the network device will The terminal device sends an RRC connection reconfiguration message that carries reconfiguration and synchronization (reconfigurationwithsync).
  • Reconfigurationwithsync can be used to instruct the terminal device to perform MAC reset and random access, and the reset indication information in the embodiment of the present application is not reconfigurationwithsync.
  • the reset indication information may be information newly added in the first message, for example, one or more bits may be added in the first message as the reset indication information.
  • the reset indication information may be used to instruct to reset the MAC layer in the MAC layer, the RLC layer, and the PDCP layer, but not used to indicate the reconstruction of the RLC layer and the PDCP layer, that is, the embodiments of the present application may be passed Special reset instruction information separately instructs to reset the MAC layer of the terminal device, so that the terminal device can reset the MAC layer to avoid decryption confusion caused by the data packet encrypted by the old key. And because the terminal device can be instructed to reset the MAC layer separately, the first network device may not need to instruct the terminal device to rebuild all the PDCP layers and RLC layers corresponding to all radio bearers, thereby effectively reducing the corresponding changes in the PDCP layer. The time when the transmission of the wireless bearer is interrupted improves the communication quality.
  • the reset indication information may indicate that the MAC layer corresponding to LTE of the terminal device or the MAC layer corresponding to NR of the terminal device is reset, that is, the indication of the reset indication information may be The MAC layer of the terminal device corresponding to LTE is reset, or the MAC layer of the terminal device corresponding to NR may be reset.
  • the PDCP layer corresponding to the first radio bearer has changed, including a bearer type change or handover, or only the PDCP layer has undergone a location change, for example, the newly established PDCP layer corresponding to the first radio bearer in the first network device, or The PDCP layer corresponding to the first radio bearer is newly established in the second network device, so it involves updating the key of the PDCP layer corresponding to the first radio bearer, then the first message may also be used to indicate the key used by the first radio bearer
  • the change occurs, which can be understood as that the first message includes corresponding information, and the information can be used to indicate that the key used by the first radio bearer changes.
  • the first message may further include first reconstruction information and second reconstruction information.
  • the first reconstruction information is used to instruct the terminal device to reconstruct the PDCP layer corresponding to the first radio bearer
  • the second reconstruction information is used to Instruct the terminal device to rebuild the RLC layer corresponding to the first radio bearer.
  • the information included in the first message indicating that the key used by the first radio bearer has changed may include the first reconstruction information and / or the second reconstruction information, that is, the first reconstruction information or the second reconstruction information.
  • the information, or including the first reconstruction information and the second reconstruction information can be understood that both the first reconstruction information and / or the second reconstruction information indicate the first radio bearer, and the terminal device determines the PDCP layer of the first radio bearer and / or Or if the RLC layer needs to be rebuilt, it can be determined that the key corresponding to the first radio bearer has changed.
  • mobilitycontrolinfo and reconfigurationwithsync are mentioned.
  • the first network device because the first network device has sent the reset indication information, the first network device may no longer need to send mobilitycontrolinfo, because the first network device no longer sends mobilitycontrolinfo, and it will not instruct the terminal device to Both the PDCP layer and the RLC layer corresponding to the radio bearer are rebuilt.
  • the terminal device can reset the MAC layer according to the reset indication information, and can also reset the PDCP layer corresponding to the first radio bearer according to the first reconstruction information Perform reconstruction and rebuild the RLC layer corresponding to the first radio bearer according to the second reconstruction information, and for other radio bearers whose corresponding PDCP layer has not changed, the terminal device does not need to rebuild the PDCP layer and RLC layer corresponding to these radio bearers Therefore, the interruption time for these radio bearers due to the reconstruction of the PDCP layer and the RLC layer is reduced, and the communication quality of other radio bearers is improved. Similarly, because the first network device has sent the reset indication information, the first network device may not need to send reconfigurationwithsync.
  • the first network device may continue to send mobilitycontrolinfo and / or reconfigurationwithsync, that is, the first network device may continue to send mobilitycontrolinfo or reconfigurationwithsync, or may continue to send mobilitycontrolinfo and reconfigurationwithsync.
  • the terminal device can perform random access in the original serving cell according to the configuration information indicated by mobilitycontrolinfo.
  • mobilitycontrolinfo does not instruct the terminal device to rebuild the PDCP layer and the RLC layer corresponding to all wireless bearers.
  • the terminal device may follow the reset instruction according to the method provided in the embodiment of the present application.
  • the information may reset the MAC layer, or the PDCP layer corresponding to the first radio bearer according to the first reconstruction information, and the RLC layer corresponding to the first radio bearer according to the second reconstruction information.
  • the terminal device does not need to rebuild the PDCP layer and RLC layer corresponding to these radio bearers, thereby reducing the interruption time for these radio bearers due to the reconstruction of the PDCP layer and RLC layer, and improving other Communication quality of wireless bearer. If the first network device continues to send reconfigurationwithsync, the reconfigurationwithsync no longer instructs the terminal device to reset the MAC layer and perform random access, but may only indicate configuration information for the terminal device to perform random access.
  • mobilitycontrolinfo may instruct the terminal device to perform random access, and may also indicate configuration information for the terminal device to perform random access.
  • the mobilitycontrolinfo is only Indicate the configuration information for the terminal device to perform random access, instead of instructing the terminal device to perform random access.
  • the reconfigurationwithsync also only indicates the configuration information for the terminal device to perform random access. Then instruct the terminal device to perform random access. Therefore, as an embodiment of instructing the terminal device to perform random access, in addition to instructing the terminal device to reset the MAC layer, the reset indication information may also instruct the terminal device to perform random access in the original serving cell.
  • the reset indication information performs random access in the original serving cell.
  • the reset indication information can indicate both MAC reset and random access, which helps to save resources and improve information utilization.
  • the terminal device may perform random access in the original serving cell through the historical configuration information of random access,
  • the historical configuration information is, for example, historically configured random access resource information of the original serving cell. If the first network device sends mobilitycontrolinfo and / or reconfigurationwithsync to indicate the configuration information of random access, the terminal device may perform random access in the original serving cell according to the configuration information indicated by mobilitycontrolinfo and / or reconfigurationwithsync.
  • the first message may further include random access indication information, and the random access indication information may be used to instruct the terminal device to perform randomization in the original serving cell of the terminal device Access, then the terminal device can perform random access in the original serving cell according to the random access instruction information. That is, multiple indications are not performed through the reset indication information, but random access is indicated through additional random access indication information.
  • This indication method can be separately indicated for MAC reset and random access, which is more flexible.
  • the random access indication information is, for example, information newly added in the first message, for example, one or more bits are added to the first message as random access indication information, or the original information in the first message may also be used as a random Access instructions.
  • the terminal device may perform random access in the original serving cell through the historical configuration information of random access. If the first network device sends mobilitycontrolinfo and / or reconfigurationwithsync to indicate the configuration information of random access, the terminal device may perform random access in the original serving cell according to the configuration information indicated by mobilitycontrolinfo and / or reconfigurationwithsync.
  • the same processing as the terminal device may be performed, that is, the MAC layer is reset, and the PDCP layer and the MAC layer corresponding to the first radio bearer are rebuilt.
  • the second network device it can also perform the same processing as the terminal device, that is, reset the MAC layer and rebuild the PDCP layer and the MAC layer corresponding to the first radio bearer.
  • the reset of the MAC layer of the terminal device may be separately instructed by special reset instruction information, so that the terminal device may implement the reset of the MAC layer to avoid the data packets encrypted by the old key Decryption mess. And because the terminal device can be instructed to reset the MAC layer separately, the first network device does not need to instruct the terminal device to rebuild all PDCP layers and RLC layers corresponding to all radio bearers, thereby effectively reducing the radio bearers that have not changed from the corresponding PDCP layer.
  • the transmission interruption time improves the communication quality.
  • the terminal device needs to reset the MAC layer, and to reset the MAC layer, the random access process brought by the reset takes a certain amount of time. Therefore, the following provides a data transmission method. In this method, the terminal device does not need to completely reset the MAC layer, which can reduce a certain interruption time caused by the MAC reset.
  • FIG. 7 is a flowchart of the data transmission method.
  • the method is applied to the network architecture shown in FIG. 5A or FIG. 5B as an example.
  • the method may be performed by two communication devices, such as a third communication device and a fourth communication device, where the third communication device may be a network device or a network device capable of supporting the functions required by the method
  • the communication device or the third communication device may be a terminal device or a communication device capable of supporting the functions required by the method by the terminal device, and of course, may be other communication devices, such as a chip system.
  • the fourth communication device may be performed by two communication devices, such as a third communication device and a fourth communication device, where the third communication device may be a network device or a network device capable of supporting the functions required by the method
  • the communication device or the third communication device may be a terminal device or a communication device capable of supporting the functions required by the method by the terminal device, and of course, may be other communication devices, such as a chip system.
  • the fourth communication device
  • the fourth communication device may be a network device or a communication device capable of supporting the functions required by the method by the network device, or the fourth communication device may be a terminal device or a device capable of supporting the terminal device to implement the method
  • the communication device with the required function can also be other communication devices, such as a chip system.
  • the method is performed by a network device and a terminal device as an example, that is, the third communication device is a network device and the fourth communication device is a terminal device as an example.
  • the network described below The device may be a network device in the network architecture shown in FIG. 5A, and the terminal device described below may be a terminal device in the network architecture shown in FIG. 5A.
  • the network device described below is, for example, the first network device in the network architecture shown in FIG. 5B, and the terminal device described below may be the terminal device in the network architecture shown in FIG. 5B.
  • the first network device is used for description.
  • the first network device generates a first message related to the change of the PDCP layer corresponding to the first radio bearer.
  • the first message includes first information, and the first information is used for all
  • the terminal device processes the MAC layer of the terminal device, wherein the way to process the MAC layer is to reset the MAC layer to a real subset of the processing modes included, to process the MAC layer Includes at least one of the following: clear the cache of the MAC layer, stop the discontinuous reception (DRX) retransmission timer, stop the round trip delay (round trip time, RTT) timer, or, New data indication (NDI) is set to new transmission;
  • DRX discontinuous reception
  • RTT round trip time
  • NDI New data indication
  • the first network device sends the first message to the terminal device, and the terminal device receives the first message from the first network device;
  • the terminal device processes the MAC layer according to the first information, where part or all of the processing of the MAC layer is a processing method included in resetting the MAC layer Of the real subset of the MAC layer, including at least one of the following: clearing the cache of the MAC layer, stopping the retransmission timer of DRX, stopping the RTT timer, or setting NDI as a new transmission.
  • the PDCP corresponding to the first radio bearer configured in the first network device may be released.
  • the first message is generated before the layer, or the first message is generated when the PDCP layer corresponding to the first radio bearer configured in the first network device is released, or the first radio bearer configured in the first network device is released.
  • the first message is generated after the corresponding PDCP layer; and if the PDCP layer corresponding to the first radio bearer is to be established in the first network device, the PDCP layer corresponding to the first radio bearer may be established in the first network device
  • the first message is generated, or the first message is generated at the same time as the PDCP layer corresponding to the first radio bearer is established in the first network device, or the first message is generated after the PDCP layer corresponding to the first radio bearer is established in the first network device News.
  • the first radio bearer here may be any radio bearer.
  • the first network device may send the first message to the terminal device.
  • the sequence between the movement of the PDCP layer and the sending of the first message is not limited.
  • the PDCP layer corresponding to the first radio bearer configured in the first network device is to be released, the corresponding one of the first radio bearers configured in the first network device may be released.
  • the first message is sent; and if the PDCP layer corresponding to the first radio bearer is to be established in the first network device, the PDCP layer corresponding to the first radio bearer may be established in the first network device Send the first message before, or send the first message while establishing the PDCP layer corresponding to the first radio bearer in the first network device, or send the first message after establishing the PDCP layer corresponding to the first radio bearer in the first network device A message.
  • the first message is an RRC connection reconfiguration message
  • the first information included in the first message is the information provided by the embodiment of the present application specifically for instructing the MAC layer of the terminal device, and Not mobilitycontrolinfo, that is, the first information is different from mobilitycontrolinfo.
  • the network device will send an RRC connection reconfiguration message carrying mobilitycontrolinfo to the terminal device, while for the MAC layer corresponding to NR in the terminal device, the network device will The terminal device sends an RRC connection reconfiguration message carrying reconfigurationwithsync.
  • Reconfigurationwithsync can be used to instruct the terminal device to perform MAC reset and random access, and the first information in the embodiment of the present application is not reconfigurationwithsync. That is to say, the embodiments of the present application can separately instruct the processing of the MAC layer of the terminal device through the dedicated first information, so that the terminal device can implement the processing of the MAC layer to avoid the decryption confusion caused by the data packet encrypted by the old key . And because the terminal device can be instructed to process the MAC layer separately, the first network device does not need to instruct the terminal device to rebuild the PDCP layer and the RLC layer corresponding to all radio bearers, thereby effectively reducing the radio frequency of the corresponding PDCP layer without change. The time when the bearer transmission is interrupted improves the communication quality.
  • the first information in the embodiment of the present application is not the uplink transmission enhanced configuration information, that is, the first information is different from the uplink transmission enhanced configuration information
  • the uplink transmission enhanced configuration information is the physical uplink shared channel enhanced configuration ( physical, uplink, shared channels, enhancementsconfig, pusch-EnhancementsConfig).
  • the network device will send pusch-EnhancementsConfig to the terminal device when configuration is required, or if the PUSCH enhancement mode has been configured before, when the release is required , The network device will send pusch-EnhancementsConfig to the terminal device.
  • the first network device sends the first information to the terminal device when the PDCP layer changes or is about to change, regardless of the uplink transmission enhancement.
  • the first information in the embodiment of the present application is not coverage enhancement mode information, that is, the first information is information different from the coverage enhancement mode information.
  • the coverage enhancement mode information is physical configuration dedicated (physicalConfigDedicated) information.
  • the network device will send physicalConfigDedicated to the terminal device when configuration is required, or if the coverage enhancement mode has been configured before, the network device will send The terminal device sends physicalConfigDedicated.
  • the first network device sends the first information to the terminal device when the PDCP layer changes or is about to change, regardless of coverage enhancement.
  • the MAC layer in the embodiment of the present application may be a MAC layer corresponding to LTE, or a MAC layer corresponding to NR.
  • the processing method for resetting the MAC may include:
  • TAT time alignment timers
  • the preamble index and physical resource index of the random access allocated to the terminal device (among them, some random access preamble indexes and physical resource indexes may be selected by the terminal device, Some random access preamble indexes and physical resource indexes are allocated by the network device to the terminal device. Here, discarded are random access preamble indexes and physical resource indexes assigned by the network device to the terminal device);
  • the next transmission block received is considered to be the first transmission
  • the temporary user ID is released.
  • the temporary user identifier is, for example, a cell radio network temporary identifier (cell radio network identifier, C-RNTI).
  • the remaining partial mode is a subset of the processing modes included in performing other processing on the MAC layer, or the remaining partial mode is not a mode for resetting the MAC layer.
  • some methods of processing the MAC layer include clearing the cache of the MAC layer, stopping the DRX retransmission timer, stopping the RTT timer, and setting NDI to be a new transmission.
  • the remaining partial methods for processing the MAC layer in the embodiments of the application include processing such as configuring the MAC layer, such as resetting HARQ related parameters.
  • the first information may indicate processing of the MAC layer corresponding to LTE of the terminal device and / or the MAC layer corresponding to NR of the terminal device, that is, the first information may indicate The MAC layer corresponding to LTE of the terminal device may be processed, or the MAC layer corresponding to NR of the terminal device may be processed, or both the MAC layer corresponding to LTE and the MAC layer corresponding to NR may be processed. Or, if the terminal device has only one MAC layer, the first information may also be an instruction to process the one MAC layer.
  • the PDCP layer corresponding to the first radio bearer changes, for example, the PDCP layer corresponding to the first radio bearer is newly established in the first network device, or the PDCP layer corresponding to the first radio bearer is newly established in the second network device Therefore, it involves updating the key of the PDCP layer corresponding to the first radio bearer, then the first message may also be used to indicate that the key used by the first radio bearer has changed, for example, it is understood that the first message includes corresponding information, This information may be used to indicate that the key used by the first radio bearer has changed. In addition, to change the key, in addition to processing the MAC layer, the PDCP layer and the RLC layer corresponding to the first radio bearer need to be rebuilt.
  • the first message may further include first reconstruction information and second reconstruction information.
  • the first reconstruction information is used to instruct the terminal device to reconstruct the PDCP layer corresponding to the first radio bearer
  • the second reconstruction information is used to Instruct the terminal device to rebuild the RLC layer corresponding to the first radio bearer.
  • the first information includes first reconstruction information and / or second reconstruction information, that is, the first information may be implemented by the first reconstruction information and / or the second reconstruction information. Both the first rebuilding information and / or the second rebuilding information indicate rebuilding.
  • the terminal device determines that the PDCP layer and / or RLC layer of a certain radio bearer needs to be rebuilt, and thus can determine to process the MAC layer.
  • the first network device implicitly instructs the terminal device to process the MAC layer without using special information as the first information, which helps to save resources.
  • the first information is not the first reconstruction information and / or the second reconstruction information, but information may be added to the first message as the first information.
  • the first network device indicates that the terminal device is to process the MAC layer to make the indication more clear.
  • mobilitycontrolinfo and reconfigurationwithsync are mentioned.
  • the network device because the network device has already sent the first information, the network device may no longer need to send mobilitycontrolinfo, because the network device no longer sends mobilitycontrolinfo, and will not instruct the terminal device to correspond to the PDCP layer and The RLC layers are all rebuilt.
  • the terminal device can process the MAC layer according to the first information, or rebuild the PDCP layer corresponding to the first radio bearer according to the first reconstruction information, and according to the second reconstruction information Reconstruction of the RLC layer corresponding to the first radio bearer, and for other radio bearers whose corresponding PDCP layer has not changed, the terminal device does not need to rebuild the PDCP layer and RLC layer corresponding to these radio bearers, thereby reducing the need to rebuild the PDCP layer and The interruption time brought to these radio bearers by the RLC layer improves the communication quality of other radio bearers.
  • the first network device can also instruct the terminal device to process the MAC layer without sending reconfigurationwithsync through the first information.
  • the terminal device may also not need to send reconfiguration with sync to avoid an erroneous response of the terminal device.
  • the first network device it may also perform the same processing as the terminal device, that is, process the MAC layer, and rebuild the PDCP layer and the MAC layer corresponding to the first radio bearer.
  • the second network device it can also perform the same processing as the terminal device, that is, process the MAC layer, and rebuild the PDCP layer and the MAC layer corresponding to the first radio bearer.
  • the dedicated first information can be used to separately instruct the MAC layer of the terminal device to be processed, so that the terminal device can implement the MAC layer to avoid decryption confusion caused by the data packet encrypted by the old key. Because the terminal device can be instructed to process the MAC layer separately, the network device does not need to instruct the terminal device to rebuild the PDCP layer and the RLC layer corresponding to all radio bearers, which can effectively reduce the transmission of the corresponding radio bearers that have not changed the PDCP layer. Interrupted time improves communication quality.
  • part of the way the terminal device processes the MAC layer is a true subset of the way the MAC layer is reset, that is, the terminal device does not need to completely reset the MAC layer, which can also reduce the processing of the MAC layer Time also reduces the time for transmission interruption and improves the communication quality. And because the terminal device does not reset the MAC layer, the terminal device no longer needs to perform random access, which further reduces the time for transmission interruption.
  • the terminal device In the embodiment shown in FIG. 6 and the embodiment shown in FIG. 7, the terminal device must perform corresponding processing on the MAC layer, and these processing will cause a certain transmission interruption. In view of this, a data transmission method is provided below, by which transmission interruption can be avoided as much as possible.
  • FIG. 8 is a flowchart of the data transmission method.
  • the method is applied to the network architecture shown in FIG. 5A or FIG. 5B as an example.
  • the method may be performed by two communication devices, such as a fifth communication device and a sixth communication device, where the fifth communication device may be a network device or a network device capable of supporting the functions required by the method
  • the communication device or the fifth communication device may be a terminal device or a communication device capable of supporting the functions required by the method by the terminal device, and of course may be other communication devices, such as a chip system.
  • the same is true for the sixth communication device.
  • the sixth communication device may be a network device or a communication device capable of supporting the network device to implement the functions required by the method, or the sixth communication device may be a terminal device or a device capable of supporting the terminal device to implement the method.
  • the communication device with the required function can also be other communication devices, such as a chip system.
  • the fifth communication device may be a network device
  • the sixth communication device is a terminal device
  • the fifth communication device and the sixth communication device are both networks
  • the device, or the fifth communication device and the sixth communication device are both terminal devices
  • the fifth communication device is a network device
  • the sixth communication device is a communication device capable of supporting the functions required by the method by the terminal device, and so on.
  • the network device is, for example, a base station.
  • the method is performed by a network device and a terminal device as an example, that is, the fifth communication device is a network device and the sixth communication device is a terminal device as an example.
  • the network described below The device may be a network device in the network architecture shown in FIG. 5A, and the terminal device described below may be a terminal device in the network architecture shown in FIG. 5A.
  • the network device described below is, for example, the first network device in the network architecture shown in FIG. 5B, and the terminal device described below may be the terminal device in the network architecture shown in FIG. 5B.
  • the first network device is used for description.
  • the first network device releases the PDCP layer corresponding to the first radio bearer configured in the first network device, or establishes a PDCP layer corresponding to the first radio bearer in the first network device;
  • the first network device acts as a terminal device to schedule downlink new transmission data, and does not schedule downlink retransmission data for the terminal device in the downlink.
  • the terminal device receives the downlink new transmission data from the first network device ⁇ ⁇ Transfer data.
  • the first network device releases the PDCP layer corresponding to the first radio bearer configured in the first network device, or establishes a PDCP layer corresponding to the first radio bearer in the first network device, then for the first radio bearer, It may be that the first network device also stores the data encrypted with the old key of the first radio bearer in the HARQ cache of the MAC layer of the first network device. If the first network device acts as the terminal device to schedule downlink retransmission data, the retransmission data is likely to include data encrypted with the old key.
  • the first network device may schedule downlink new transmission data for the terminal device in the downlink, that is, do not schedule downlink retransmission data for the terminal device, and the new transmission data may be the first network device Generated by the new key encryption, so that the first network device sends the data encrypted with the new key as much as possible, and the data encrypted with the old key is no longer sent, so that the terminal device can correct the received data Decryption.
  • the first network device also schedules uplink new transmission data for the terminal device in the uplink, and does not schedule uplink retransmission data for the terminal device in the uplink. For example, if the first network device releases the PDCP layer corresponding to the first radio bearer configured in the first network device, or establishes a PDCP layer corresponding to the first radio bearer in the first network device, then for the first radio bearer, The terminal device may also store the data encrypted with the old key of the first radio bearer in the HARQ cache of the MAC layer of the terminal device. If the first network device acts as the terminal device to schedule uplink retransmission data, the retransmission data is likely to include data encrypted with the old key.
  • the first network device can schedule uplink new transmission data for the terminal device in the uplink. It can be understood that the first network device only schedules uplink new transmission data for the terminal device, not for the terminal device. Scheduling uplink retransmission data.
  • the newly transmitted data can be generated by the terminal device through new key encryption, so that the terminal device sends out the data encrypted with the new key as much as possible, and the data encrypted with the old key is no longer sent. , So that the first network device can correctly decrypt the received data.
  • the first network device can still schedule uplink retransmission data for the terminal device in the uplink.
  • the first network device can schedule uplink new transmission data for the terminal device or schedule uplink retransmission data for the terminal device. It is possible that only a part of the radio bearers corresponding to the PDCP layer has changed. For example, only the PDCP layer corresponding to the first radio bearer has changed, while the PDCP layer corresponding to other radio bearers has not changed, that is, other radio bearers use The key is unchanged.
  • the terminal device When the terminal device sends data, it may be that the data of multiple wireless bearers are sent together in a transport block (TB), and if the first network device does not schedule uplink retransmission, the data of other wireless bearers It may also fail to transfer. Therefore, the first network device can still schedule the terminal device to transmit the uplink retransmission data.
  • TB transport block
  • the transceiver 902 is configured to receive a first message from a first network device, where the first message includes reset indication information, and the reset indication information is used to instruct to reset the MAC layer of the terminal device;
  • the processor 901 is configured to reset the MAC layer.
  • FIG. 10 shows a schematic structural diagram of a communication device 1000.
  • the communication apparatus 1000 can realize the functions of the first network device mentioned above.
  • the communication apparatus 1000 may be the first network device described above, or may be a chip provided in the first network device described above.
  • the communication device 1000 may include a processor 1001 and a transceiver 1002.
  • the processor 1001 may be used to execute S61 in the embodiment shown in FIG. 6 and / or other processes for supporting the technology described herein.
  • the transceiver 1002 may be used to perform S62 in the embodiment shown in FIG. 6, and / or other processes for supporting the technology described herein.
  • the processor 1001 is configured to generate a first message related to the change of the PDCP layer corresponding to the first radio bearer, the first message includes reset indication information, and the reset indication information is used To instruct to reset the MAC layer of the terminal device;
  • the transceiver 1002 is configured to send the first message to the terminal device.
  • FIG. 11 shows a schematic structural diagram of a communication device 1100.
  • the communication device 1100 can realize the functions of the terminal device mentioned above.
  • the communication apparatus 1100 may be the terminal device described above, or may be a chip provided in the terminal device described above.
  • the communication device 1100 may include a processor 1101 and a transceiver 1102. Among them, the processor 1101 may be used to execute S73 in the embodiment shown in FIG. 7 and / or other processes for supporting the technology described herein.
  • the transceiver 1102 may be used to perform S72 in the embodiment shown in FIG. 7, and / or other processes for supporting the technology described herein.
  • the transceiver 1102 is configured to receive a first message from a first network device, where the first message includes first information;
  • FIG. 12 shows a schematic structural diagram of a communication device 1200.
  • the communication apparatus 1200 may implement the functions of the first network device mentioned above.
  • the communication apparatus 1200 may be the first network device described above, or may be a chip provided in the first network device described above.
  • the communication device 1200 may include a processor 1201 and a transceiver 1202.
  • the processor 1201 may be used to execute S71 in the embodiment shown in FIG. 7 and / or other processes for supporting the technology described herein.
  • the transceiver 1202 may be used to perform S72 in the embodiment shown in FIG. 7, and / or other processes for supporting the technology described herein.
  • the processor 1201 is configured to generate a first message related to the change of the PDCP layer corresponding to the first radio bearer.
  • the first message includes first information, and the first information is used for
  • the terminal device processes the MAC layer of the terminal device;
  • the transceiver 1202 is configured to send the first message to the terminal device; wherein part or all of the processing of the MAC layer is a true subset of the processing methods included in resetting the MAC layer ,
  • the manner of processing the MAC layer includes at least one of the following:
  • FIG. 13 shows a schematic structural diagram of a communication device 1300.
  • the communication apparatus 1300 may implement the functions of the first network device mentioned above.
  • the communication apparatus 1300 may be the first network device described above, or may be a chip provided in the first network device described above.
  • the communication device 1300 may include a processor 1301 and a transceiver 1302. Among them, the processor 1301 may be used to execute S81 and S82 in the embodiment shown in FIG. 8, and / or other processes for supporting the technology described herein.
  • the transceiver 1302 may be used to perform S82 in the embodiment shown in FIG. 8, and / or other processes for supporting the technology described herein.
  • the processor 1301 is further configured to use the transceiver 1302 to schedule the downlink new transmission data of the terminal device in the next line, and does not schedule downlink retransmission data for the terminal device in the downlink.
  • the communication device 900, the communication device 1000, the communication device 1100, the communication device 1200, or the communication device 1300 can also be passed through the communication device 1400 shown in FIG. 14A.
  • the communication apparatus 1400 can realize the functions of the terminal device or network device mentioned above.
  • the communication device 1400 may include a processor 1401.
  • the processor 1401 may be used to execute S63 in the embodiment shown in FIG. 6 and / or to support the technology described herein Other processes; or, when the communication device 1400 is used to implement the functions of the first network device mentioned above, the processor 1401 may be used to execute S61 in the embodiment shown in FIG. 6, and / or to support this document Other processes of the described technology. Or, when the communication device 1400 is used to implement the functions of the terminal device mentioned above, the processor 1401 may be used to execute S73 in the embodiment shown in FIG.
  • the processor 1401 may be used to execute S71 in the embodiment shown in FIG. 7, and / or to support this document Other processes of the described technology.
  • the processor 1401 may be used to execute S81 and S82 in the embodiment shown in FIG. 8, and / or to support the Other processes of the described technology.
  • the communication device 1400 can pass field programmable gate array (field-programmable gate array, FPGA), application-specific integrated circuit (ASIC), system chip (SoC), central processor (central processor) unit, CPU), network processor (NP), digital signal processor (DSP), microcontroller (microcontroller unit, MCU), or programmable controller (programmable logic device, PLD) or other integrated chips, the communication device 1400 may be set in the terminal device or the first network device of the embodiment of the present application, so that the terminal device or the first network device implements the method provided by the embodiment of the present application.
  • field-programmable gate array field-programmable gate array
  • ASIC application-specific integrated circuit
  • SoC system chip
  • central processor central processor
  • CPU central processor
  • NP network processor
  • DSP digital signal processor
  • microcontroller microcontroller unit, MCU
  • PLD programmable controller
  • the communication device 1400 may include a transceiver component for communicating with other devices.
  • the transceiving component may be used to perform S62 in the embodiment shown in FIG. 6, and / or to support the Other processes of the described technology.
  • the transceiving component may be used to perform S72 in the embodiment shown in FIG. 7 and / or to support the Other processes of the described technology.
  • the transceiving component may be used to execute S82 in the embodiment shown in FIG. 8 and / or to support the Other processes of the described technology.
  • the communication device 1400 may further include a memory 1402, as shown in FIG. 14B, wherein the memory 1402 is used to store computer programs or instructions, and the processor 1401 is used to decode and execute these computer programs or instructions. .
  • these computer programs or instructions may include the above functional programs of the terminal device or the first network device.
  • the terminal device can enable the terminal device to realize the function of the terminal device in the method provided in the embodiment shown in FIG. The function of the terminal device in the method provided by the illustrated embodiment, or the function of the terminal device in the method provided by the embodiment shown in FIG. 8 of the embodiment of the present application.
  • the network device may enable the network device to implement the function of the first network device in the method provided in the embodiment shown in FIG. 6 of the present application, or implement the embodiment of the present application The function of the first network device in the method provided by the embodiment shown in FIG. 7 or the function of the first network device in the method provided by the embodiment shown in FIG. 8 of the embodiment of the present application.
  • the function programs of these terminal devices or the first network device are stored in a memory external to the communication apparatus 1400.
  • the function program of the terminal device is decoded and executed by the processor 1401
  • part or all of the content of the function program of the terminal device is temporarily stored in the memory 1402.
  • the function program of the first network device is decoded and executed by the processor 1401
  • part or all of the content of the function program of the first network device is temporarily stored in the memory 1402.
  • the function programs of these terminal devices or the first network device are set in the memory 1402 stored in the communication device 1400.
  • the communication device 1400 may be set in the terminal device of the embodiment of the present application.
  • the function program of the first network device is stored in the memory 1402 inside the communication device 1400, the communication device 1400 may be set in the first network device of the embodiment of the present application.
  • part of the content of the functional programs of these terminal devices is stored in a memory external to the communication device 1400, and other parts of the functional programs of these terminal devices are stored in the memory 1402 inside the communication device 1400.
  • part of the content of the function program of these first network devices is stored in the memory outside the communication device 1400, and other part of the content of the function program of these first network devices is stored in the memory 1402 inside the communication device 1400.
  • the communication device 900, the communication device 1000, the communication device 1100, the communication device 1200, the communication device 1300, and the communication device 1400 are presented in the form of dividing each function module into corresponding functions, or may be divided in an integrated manner Presented in the form of various functional modules.
  • the "module” herein may refer to an ASIC, a processor and memory that execute one or more software or firmware programs, integrated logic circuits, and / or other devices that can provide the above-mentioned functions.
  • the communication device 900 provided by the embodiment shown in FIG. 9 may also be implemented in other forms.
  • the communication device includes a processing module and a transceiver module.
  • the processing module may be implemented by the processor 901, and the transceiver module may be implemented by the transceiver 902.
  • the processing module may be used to execute S63 in the embodiment shown in FIG. 6, and / or other processes used to support the technology described herein.
  • the transceiver module may be used to perform S62 in the embodiment shown in FIG. 6, and / or other processes for supporting the technology described herein.
  • the transceiver module is configured to receive a first message from a first network device, where the first message includes reset indication information, and the reset indication information is used to instruct to reset the MAC layer of the terminal device;
  • the processing module is configured to reset the MAC layer.
  • the communication device 1000 provided by the embodiment shown in FIG. 10 may also be implemented in other forms.
  • the communication device includes a processing module and a transceiver module.
  • the processing module may be implemented by the processor 1001, and the transceiver module may be implemented by the transceiver 1002.
  • the processing module may be used to execute S61 in the embodiment shown in FIG. 6, and / or other processes for supporting the technology described herein.
  • the transceiver module may be used to perform S62 in the embodiment shown in FIG. 6, and / or other processes for supporting the technology described herein.
  • the processing module is configured to generate a first message related to the change of the PDCP layer corresponding to the first radio bearer, the first message includes reset indication information, and the reset indication information is used to Instruct to reset the MAC layer of the terminal device;
  • the transceiver module is configured to send the first message to the terminal device.
  • the communication device 1100 provided by the embodiment shown in FIG. 11 may also be implemented in other forms.
  • the communication device includes a processing module and a transceiver module.
  • the processing module may be implemented by the processor 1101, and the transceiver module may be implemented by the transceiver 1102.
  • the processing module may be used to execute S73 in the embodiment shown in FIG. 7, and / or other processes used to support the technology described herein.
  • the transceiver module may be used to perform S72 in the embodiment shown in FIG. 7 and / or other processes for supporting the technology described herein.
  • the transceiver module is configured to receive a first message from a first network device, where the first message includes first information;
  • a processing module configured to process the MAC layer according to the first information, wherein part or all of the processing of the MAC layer is a processing method included in resetting the MAC layer
  • the manner of processing the MAC layer includes at least one of the following:
  • the communication device 1200 provided by the embodiment shown in FIG. 12 may also be implemented in other forms.
  • the communication device includes a processing module and a transceiver module.
  • the processing module may be implemented by the processor 1201, and the transceiver module may be implemented by the transceiver 1202.
  • the processing module may be used to execute S71 in the embodiment shown in FIG. 7 and / or other processes for supporting the technology described herein.
  • the transceiver module may be used to perform S72 in the embodiment shown in FIG. 7 and / or other processes for supporting the technology described herein.
  • the processing module is configured to generate a first message related to the change of the PDCP layer corresponding to the first radio bearer, the first message includes first information, and the first information is used to
  • the terminal device processes the MAC layer of the terminal device;
  • the communication device 1300 provided by the embodiment shown in FIG. 13 may also be implemented in other forms.
  • the communication device includes a processing module and a transceiver module.
  • the processing module may be implemented by the processor 1301, and the transceiver module may be implemented by the transceiver 1302.
  • the processing module may be used to execute S81 and S82 in the embodiment shown in FIG. 8 and / or other processes used to support the technology described herein.
  • the transceiver module may be used to perform S82 in the embodiment shown in FIG. 8 and / or other processes for supporting the technology described herein.
  • the processing module is configured to release the PDCP layer corresponding to the first radio bearer configured in the first network device, or establish the PDCP layer corresponding to the first radio bearer in the first network device;
  • the processing module is also used for scheduling downlink new transmission data of the terminal device through the transceiver module, and not scheduling downlink retransmission data for the terminal device in the downlink.
  • These computer program instructions can be provided to the processor of a general-purpose computer, special-purpose computer, embedded processing machine, or other programmable data processing device to produce a machine that enables the generation of instructions executed by the processor of the computer or other programmable data processing device
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a dedicated 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 storage medium to another readable storage medium, for example, the computer instructions may be passed from a website site, computer, server or data center Wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) way to another website site, computer, server or data center transmission.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including a server, a data center, and the like integrated with one or more available media.
  • the available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, digital universal disc (DVD)), or semiconductor media (eg, solid state disk (SSD) ))Wait.

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

Abstract

La présente invention concerne un procédé et un appareil pour réinitialiser une couche MAC, et un procédé et un appareil de transmission de données, utilisés pour réduire le temps d'interruption de transmission. Le procédé pour réinitialiser une couche MAC consiste : à recevoir un premier message en provenance d'un premier dispositif de réseau, le premier message comprenant des informations d'instruction de réinitialisation, les informations d'instruction de réinitialisation étant utilisées pour ordonner de réinitialiser la couche MAC d'un équipement terminal ; et à réinitialiser la couche MAC. Au moyen des informations d'instruction de réinitialisation, l'équipement terminal peut être ordonné séparément de réinitialiser la couche MAC, de sorte que l'équipement terminal puisse réinitialiser la couche MAC, de manière à éviter une confusion de déchiffrement d'un paquet de données chiffré au moyen d'une ancienne clé.
PCT/CN2019/114841 2018-10-31 2019-10-31 Procédé et appareil pour réinitialiser une couche mac, et procédé et appareil de transmission de données WO2020088611A1 (fr)

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CN201811287925.3A CN111132186B (zh) 2018-10-31 2018-10-31 一种重置mac层、数据传输方法及装置

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CN117751561A (zh) * 2022-07-20 2024-03-22 北京小米移动软件有限公司 混合自动重传请求harq进程处理方法及装置

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