WO2020221011A1 - 数据传输的方法和装置 - Google Patents

数据传输的方法和装置 Download PDF

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Publication number
WO2020221011A1
WO2020221011A1 PCT/CN2020/084979 CN2020084979W WO2020221011A1 WO 2020221011 A1 WO2020221011 A1 WO 2020221011A1 CN 2020084979 W CN2020084979 W CN 2020084979W WO 2020221011 A1 WO2020221011 A1 WO 2020221011A1
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Prior art keywords
terminal device
intermediate node
data packet
network device
dci
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PCT/CN2020/084979
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English (en)
French (fr)
Inventor
黄曲芳
罗海燕
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华为技术有限公司
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Publication of WO2020221011A1 publication Critical patent/WO2020221011A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/56—Provisioning of proxy services
    • H04L67/562—Brokering proxy services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection

Definitions

  • This application relates to the field of communications, and more specifically, to a method and device for data transmission.
  • the future 5th generation (5G) system mainly supports three types of services:
  • Enhanced mobile broadband communications eMBB
  • massive machine type communications mMTC
  • ultra-reliable and low latency communications URLLC
  • eMBB enhanced mobile broadband communications
  • mMTC massive machine type communications
  • URLLC ultra-reliable and low latency communications
  • eMBB Enhanced mobile broadband communications
  • mMTC massive machine type communications
  • URLLC ultra-reliable and low latency communications
  • the data transmission model of industrial control is very different from the data transmission model of traditional wireless communication networks.
  • the data transmitted by the traditional wireless communication network is irregular, that is to say, the mobile communication network does not know what the transmitted data is, and transmits the data when it is received.
  • the action instructions of each production process are predictable.
  • the signaling transmitted by the wireless network is very regular.
  • NodeX the X node
  • NodeX knows the production process in advance, so the control center only needs to trigger the network equipment to start the production process.
  • the network equipment informs NodeX to start the production process.
  • NodeX receives the notification message from the network equipment, it controls the terminal equipment to complete the production process. In this way, NodeX can be deployed closer to the terminal device, so that a large amount of data transmission occurs between NodeX and the terminal device, and the distance between the two nodes is relatively close, so that wireless resources can be saved , Reduce power.
  • NodeX needs to forward it.
  • this type of data is relatively urgent data and requires relatively high latency. For example, when an emergency occurs, the control center informs the network device to stop operation. For the processing of such forwarding data, it is necessary to consider how to send it to ensure normal communication.
  • This application provides a method and device for data transmission to ensure normal communication.
  • a data transmission method is provided, which is applied when a network device sends a data packet to a terminal device via an intermediate node, including: the network device determines a first DCI and a first data packet, and the first DCI passes through the terminal device
  • the first data packet includes the data packet sent to the terminal device; the network device sends the first DCI and the first data packet to the intermediate node.
  • a network device when a network device needs to send a data packet to a terminal device, it can be forwarded via an intermediate node, and the terminal device can only monitor the signal sent by the intermediate node, which reduces the complexity of the terminal device .
  • the first DCI sent by the network device to the intermediate node is scrambled via the identification of the terminal device.
  • the intermediate node only needs to correctly descramble the first DCI to obtain the first data packet without descrambling the first data packet, so that Data packets can be quickly forwarded to improve the performance of data transmission.
  • the processing of the first DCI involved in this application via the identification of the terminal device may include scrambling the first data packet via the identification of the terminal device.
  • first DCI There may be a correspondence between the first DCI and the first data packet sent by the network device to the intermediate node, and the first DCI is used by the intermediate node to obtain the first data packet.
  • terminal device does not specifically refer to a certain terminal device, and may be any one of multiple terminal devices connected to an intermediate node.
  • An intermediate node connected to a certain terminal device can also be described as a certain terminal device associated with the intermediate node.
  • the method before the network device determines the first DCI and the first data packet, the method further includes: the network device assigns the terminal device identifier to the terminal device; and the network device sends the intermediate node Send the identification of the terminal device.
  • the method before the network device determines the first DCI and the first data packet, the method further includes:
  • the network device receives the identification of the terminal device sent by the intermediate node.
  • the identifier of the terminal device that scrambles the first DCI may be configured by the network device or configured by the intermediate node. Provide a flexible scheme for configuring terminal device identification.
  • the identification of the terminal device involved in this application may refer to the RNTI of the terminal device, or the identification (ID) of the terminal device and other information capable of identifying the terminal device.
  • the method further includes: the network device sends a handover request to the target network device, the handover request is used to request the intermediate node and the terminal device to access the target network device, wherein the handover The request carries the identification of the terminal device; the network device receives the handover response sent by the target network device, the handover response includes first indication information, the first indication information is used to indicate that the identity of the terminal device needs to be updated; the network device sends a handover command to the intermediate node, The handover command is used to notify the intermediate node to access the target network device, where the handover command includes the first indication information.
  • the target network device when the intermediate node and the terminal device switch to the target network device, if the terminal device’s identity conflicts with the identity of the terminal device under the target network device, the target network device can indicate that it is about to The identity of the switched terminal device is updated to another identity, so as to avoid conflicts with the identity of the local terminal device.
  • the message used to request the intermediate node and terminal device to access the target network device is called a handover request, which is just an example and does not constitute any limitation on the protection scope of this application.
  • the message may also be called Switch instructions, etc.
  • the method further includes: the network device receives connection failure indication information sent by the intermediate node, where the connection failure indication information is used to indicate that the connection between the terminal device and the intermediate node fails.
  • the intermediate node determines that the connected terminal device is disconnected.
  • the intermediate node notifies the network device of the connection failure of the terminal device, so that the network device determines that the terminal device cannot continue to receive data. Avoid network devices from sending data that cannot reach the terminal device.
  • connection failure indication information used to indicate the connection failure between the terminal device and the intermediate node
  • the indication information may also It is called failure indication, or disconnection indication, or disconnection indication, etc.
  • a data transmission method including: an intermediate node receives a first DCI and a first data packet sent by a network device, the first DCI is processed via an identifier of the terminal device, and the first data packet includes sending to the terminal The data packet of the device; the intermediate node descrambles the first DCI based on the identification of the terminal device to obtain the first data packet; the intermediate node sends the third DCI and the first data packet to the terminal device, and the third DCI is processed through the identification of the terminal device.
  • a network device when a network device needs to send a data packet to a terminal device, it can be forwarded via an intermediate node, and the terminal device can only monitor the signal sent by the intermediate node, which reduces the complexity of the terminal device .
  • the first DCI sent by the network device to the intermediate node is scrambled via the identification of the terminal device.
  • the intermediate node only needs to correctly descramble the first DCI to obtain the first data packet. There is no need to descramble the first data packet.
  • a data packet is directly sent to the terminal device, so that the data packet can be quickly forwarded and the performance of data transmission is improved.
  • the processing of the first DCI involved in this application through the identification of the terminal device can be understood as the first data packet being scrambled through the identification of the terminal device.
  • first DCI and the first data packet sent by the network device to the intermediate node There may be a correspondence between the first DCI and the first data packet sent by the network device to the intermediate node, and the first DCI is used by the intermediate node to obtain the first data packet.
  • the third DCI sent by the intermediate node to the terminal device and the first data packet that is, the third DCI is used by the terminal device to obtain the first data packet.
  • the method before the intermediate node receives the first DCI and the first data packet sent by the network device, the method further includes: the intermediate node is the terminal The device allocates the identification of the terminal device; the intermediate node sends the identification of the terminal device to the network device.
  • the method before the network device determines the first DCI and the first data packet, the method further includes: the intermediate node receives the terminal device's information sent by the network device Logo.
  • the identifier of the terminal device that scrambles the first DCI may be configured by the network device or configured by the intermediate node. Provide flexible configuration schemes.
  • the identification of the terminal device involved in this application may refer to the RNTI of the terminal device, or the ID of the terminal device and other information capable of identifying the terminal device.
  • the method further includes: the intermediate node receives a handover command sent by the network device, and the handover command is used to notify the intermediate node to access the target A network device, where the handover command includes first indication information, and the first indication information is used to indicate that the identity of the terminal device needs to be updated.
  • the target network device when the intermediate node and the terminal device are switched to the target network device, if the terminal device's identity conflicts with the identity of the terminal device under the target network device, the target network device can indicate that it is about to switch The identity of the terminal device that comes over is updated to another identity, so as to avoid conflicts with the identity of the local terminal device.
  • the method further includes: the intermediate node sends connection failure indication information to the network device, where the connection failure indication information is used to instruct the terminal device to communicate with the network device. The connection between the intermediate nodes failed.
  • the intermediate node determines that the connected terminal device is disconnected, that is, the terminal device no longer maintains the connection with the intermediate node.
  • the intermediate node notifies the network device of the connection failure of the terminal device, so that the network device determines that the terminal device cannot continue to receive data.
  • connection failure indication information used to indicate the connection failure between the terminal device and the intermediate node
  • the indication information may also It is called failure indication, or disconnection indication, or disconnection indication, etc.
  • a data transmission method including: a terminal device receives a third DCI and the first data packet sent by an intermediate node, the third DCI is processed via an identifier of the terminal device, and the The first data packet includes a data packet sent to the terminal device; the terminal device descrambles the third DCI based on the identifier of the terminal device to obtain the first data packet.
  • the terminal device can receive the data packet sent by the network device to the terminal device from the intermediate node, and the terminal device can only monitor the signal sent by the intermediate node, which reduces the complexity of the terminal device.
  • the method before the terminal device receives the third DCI and the first data packet sent by the intermediate node, the method further includes: the terminal device receives the The identifier of the terminal device sent by the intermediate node; or the terminal device receives the identifier of the terminal device sent by a network device.
  • the identifier of the terminal device that scrambles the first DCI may be configured by the network device or configured by the intermediate node. Provide flexible configuration schemes.
  • the identification of the terminal device involved in this application may refer to the RNTI of the terminal device, or the ID of the terminal device and other information capable of identifying the terminal device.
  • the method further includes: the terminal device receives first indication information sent by the intermediate node, where the first indication information is used to instruct the terminal The identification of the device needs to be updated.
  • the identification of the terminal device can be updated, thereby avoiding conflicts between the identifications of multiple terminal devices.
  • a data transmission method is provided.
  • the method includes: the network device determines a second DCI and a second data packet, and the second The DCI is processed via the identifier of the intermediate node, the second data packet includes a data packet sent to N terminal devices, and N is a positive integer; the network device sends the second DCI and the first data packet to the intermediate node Two data packets.
  • a network device when a network device needs to send a data packet to N terminal devices, it can be forwarded via an intermediate node, and then N terminal devices may only need to monitor the signal sent by the intermediate node, reducing the number of terminals.
  • the complexity of the equipment when a network device needs to send a data packet to N terminal devices, it can be forwarded via an intermediate node, and then N terminal devices may only need to monitor the signal sent by the intermediate node, reducing the number of terminals. The complexity of the equipment.
  • the processing of the second DCI involved in this application via the identifier of the intermediate node may include scrambling the second data packet via the identifier of the intermediate node.
  • the method before the network device determines the second DCI and the second data packet, the method further includes: the network device allocates data to the intermediate node The identifier of the intermediate node.
  • the identifier of the intermediate node that scrambles the second DCI is configured by the network device for the intermediate node.
  • the second DCI further includes second indication information for indicating the N terminal devices; or, the MAC header of the second data packet It is used to indicate the size of the data packet sent to the N terminal devices in the N terminal devices and the second data packet.
  • the second DCI or the MAC subheader of the second data packet indicates which terminal devices the data in the second data packet is sent to, so that the second data packet needs to be sent to N Data packets of one terminal device are successfully sent to the N terminal devices
  • the method further includes: the network device assigns identities of the N terminal devices to the N terminal devices; The node sends the identities of the N terminal devices.
  • the method further includes: the network device receiving the identities of the N terminal devices sent by the intermediate node.
  • the identification of the terminal device may be configured by the network device or configured by the intermediate node. Provide flexible configuration schemes.
  • the identification of the terminal device involved in this application may refer to the RNTI of the terminal device, or the ID of the terminal device and other information capable of identifying the terminal device.
  • the method further includes: the network device sends a handover request to the target network device, and the handover request is used to request that the intermediate node and the N terminals The device accesses the target network device, and the handover request carries the identities of the N terminal devices; the network device receives a handover response sent by the target network device, and the handover response includes third indication information, so The third indication information is used to indicate that the identity of the terminal device among the N terminal devices needs to be updated; the network device sends a handover command to the intermediate node, and the handover command is used to notify the intermediate node to access the target For network equipment, the handover command includes the third indication information.
  • the target network device when the intermediate node and the terminal device are switched to the target network device, if the terminal device's identity conflicts with the identity of the terminal device under the target network device, the target network device can indicate that it is about to switch The identity of the terminal device that comes over is updated to another identity, so as to avoid conflicts with the identity of the local terminal device.
  • the method further includes: the network device receives connection failure indication information sent by the intermediate node, where the connection failure indication information is used to indicate the N terminals The connection between the terminal device in the device and the intermediate node fails.
  • the intermediate node determines that the connected terminal device is disconnected, that is, the terminal device no longer maintains the connection with the intermediate node.
  • the intermediate node notifies the network device of the connection failure of the terminal device, so that the network device determines that the terminal device cannot continue to receive data.
  • a data transmission method is provided, which is applied when a network device sends data packets to N terminal devices via an intermediate node, including: the intermediate node receives the second DCI and the second data packet sent by the network device, The second DCI is processed via the identifier of the intermediate node, the first data packet includes a data packet sent to N terminal devices, and N is a positive integer; the intermediate node descrambles the data packet based on the identifier of the intermediate node The second DCI; the intermediate node determines to send the data in the second data packet to the N terminal devices respectively; the intermediate node sends the fourth DCI and the third data packet to the terminal device, the fourth DCI is processed via the identification of the terminal device, the third data packet includes the data sent to the terminal device in the second data packet, and the terminal device is any of the N terminal devices A terminal device.
  • a network device when a network device needs to send a data packet to a terminal device, it can be forwarded via an intermediate node, and the terminal device can only monitor the signal sent by the intermediate node, which reduces the complexity of the terminal device .
  • processing of the second DCI involved in this application through the identifier of the intermediate node may be understood as the second data packet being scrambled through the identifier of the intermediate node.
  • the second DCI and the second data packet sent by the network device to the intermediate node, that is, the second DCI is used by the intermediate node to obtain the second data packet.
  • the fourth DCI and the third data packet sent by the intermediate node to the terminal device, that is, the fourth DCI is used by the terminal device to obtain the third data packet.
  • the method before the intermediate node receives the second DCI and the second data packet sent by the network device, the method further includes: the intermediate node receives the network The identifier of the intermediate node sent by the device
  • the identifier of the intermediate node that scrambles the second DCI is configured by the network device for the intermediate node.
  • the second DCI further includes second indication information for indicating the N terminal devices; the intermediate node determines to transfer the second data Sending the data in the packet to the N terminal devices respectively includes: the intermediate node determines according to the second indication information to send the data in the second data packet to the N terminal devices respectively.
  • the MAC subheader of the second data packet is used to indicate that the N terminal devices and the second data packet are respectively sent to the N
  • the size of the data packet of the terminal device; the intermediate node determining to send the data in the second data packet to the N terminal devices respectively includes: the MAC layer of the intermediate node according to the MAC layer of the second data packet
  • the header determines to send the data in the second data packet to the N terminal devices respectively.
  • the second DCI or the MAC subheader of the second data packet needs to indicate the data in the second data packet To which end devices the data is sent.
  • the method further includes: the intermediate node assigns identities of the N terminal devices to the N terminal devices; The device sends the identities of the N terminal devices; or the intermediate node receives the identities of the N terminal devices sent by the network device.
  • the identification of the terminal device that scrambles the fourth DCI may be configured by the network device or configured by the intermediate node. Provide flexible configuration schemes.
  • the identification of the terminal device involved in this application may refer to the RNTI of the terminal device, or the ID of the terminal device and other information capable of identifying the terminal device.
  • the method further includes: the intermediate node receives a handover command sent by the network device, wherein the handover command includes third indication information, and The third indication information is used to indicate that the identity of the terminal device among the N terminal devices needs to be updated.
  • the destination network device can instruct the terminal device to be switched over to update the identifier to another identifier, thereby avoiding conflict with the identifier of the local terminal device.
  • the method further includes: the method further includes: the intermediate node sends connection failure indication information to the network device, and the connection failure indication information is used to indicate The connection between the terminal device of the N terminal devices and the intermediate node fails.
  • the intermediate node determines that the connected terminal device is disconnected, that is, the terminal device no longer maintains the connection with the intermediate node.
  • the intermediate node notifies the network device of the connection failure of the terminal device, so that the network device determines that the terminal device cannot continue to receive data.
  • a data transmission method including: a terminal device receives a fourth DCI and the third data packet sent by an intermediate node, the fourth DCI is processed via an identifier of the terminal device, and the The third data packet includes a data packet sent to the terminal device; the terminal device descrambles the fourth DCI based on the identifier of the terminal device to obtain the third data packet.
  • the terminal device can receive the data packet sent by the network device to the terminal device from the intermediate node, and the terminal device can only monitor the signal sent by the intermediate node, which reduces the complexity of the terminal device.
  • the method before the terminal device receives the fourth DCI and the third data packet sent by the intermediate node, the method further includes: the terminal device receives the The identifier of the terminal device sent by the intermediate node; or the terminal device receives the identifier of the terminal device sent by a network device.
  • the identification of the terminal device that scrambles the fourth DCI may be configured by the network device or configured by the intermediate node. Provide flexible configuration schemes.
  • the identification of the terminal device involved in this application may refer to the RNTI of the terminal device, or the ID of the terminal device and other information capable of identifying the terminal device.
  • the method further includes: the terminal device receives third indication information sent by the intermediate node, and the third indication information is used to instruct the terminal The identification of the device needs to be updated.
  • the identification of the terminal device can be updated, thereby avoiding conflicts between the identifications of multiple terminal devices.
  • a method for configuring an identifier includes: a network device receives a first association request message sent by an intermediate node, where the first association request message is used to request the network device to configure the identifier for a terminal device; the network device Sending an association response message to the intermediate node, where the association response message includes the identification of the terminal device.
  • the network device may configure the identifier for the terminal device after receiving the first association request message of the intermediate node, where the first association request message includes the identifier of the terminal device on the side link (sidelink user equipment identify, SL UE ID).
  • the message used to request the network device to configure the identification for the terminal device is called the first association request message, which is just an example, and does not constitute any limitation on the protection scope of this application.
  • the message can also be called It is a configuration request message, or request message, or configuration message, etc.
  • the method further includes: the network device sends the fourth indication information to the intermediate node, where the fourth indication information is used to indicate the intermediate node As a scheduling group header of at least one terminal device, the scheduling group header is used to schedule a side link SL resource for the at least one terminal device.
  • the network device may indicate that the intermediate node is the scheduling group head of the scheduling terminal device.
  • the method before the network device determines the fourth indication information, the method further includes: the network device receives a request message sent by the intermediate node, and The request message is used to request the network device to set the intermediate node as the scheduling group head, or the request message is used to notify the network device that the intermediate node has the ability of the scheduling group head; or, The network device receives fifth indication information from the core network device, where the fifth indication information is used to indicate that the intermediate node is the scheduling group head.
  • the network device may indicate that the intermediate node is the scheduling group head with various prerequisites, and the network device instructs the intermediate node to provide the scheduling group head with a flexible determination scheme.
  • the number of bits occupied by the identifier of the terminal device is less than 24.
  • the identifier length of the terminal device is smaller than the identifier length of the terminal device on the side link, thereby achieving the purpose of reducing the air interface overhead when the intermediate node schedules the terminal device on the side link.
  • a method for configuring an identifier includes: an intermediate node sends a first association request message to a network device, where the first association request message is used to request the network device to configure an identifier for a terminal device; the intermediate node receives An association response message sent by the network device, where the association response message includes the identification of the terminal device.
  • the network device may configure the identifier for the terminal device after receiving the first association request message of the intermediate node.
  • the method further includes: before the intermediate node sends the first association request message to the network device, the method further includes: the intermediate node receives the The second association request message sent by the terminal device, where the second association request message is used to request association with the intermediate node.
  • the intermediate node receives the second association request message from the terminal device, and learns that one or some terminal devices request association to the intermediate node, where the second association request message includes the SL UE ID.
  • the intermediate node receives fourth indication information sent by the network device, where the fourth indication information is used to instruct the intermediate node to serve as a scheduling of at least one terminal device A group header, where the scheduling group header is used to schedule side link SL resources for the at least one terminal device.
  • the network device may indicate that the intermediate node is the scheduling group head of the scheduling terminal device.
  • the intermediate node broadcasts a discovery message, the discovery message is used to notify a terminal device, and the intermediate node is the scheduling group head.
  • the intermediate node notifies the terminal device that it is the scheduling group head by broadcasting.
  • the intermediate node sends a request message to the network device, and the request message is used to request the network device to set the intermediate node as the scheduler The group header, or the request message is used to notify the network device that the intermediate node has the ability to schedule the group header.
  • the intermediate node sends sixth indication information to the core network device, where the sixth indication information is used to indicate that the intermediate node is a high-level group head.
  • the intermediate node there may be multiple prerequisites for the intermediate node to be the scheduling group head, and a flexible determination scheme is provided for the network device to determine the intermediate node as the scheduling group head.
  • the intermediate node sends the terminal device identifier to the terminal device.
  • the number of bits occupied by the identifier of the terminal device is less than 24.
  • the identifier length of the terminal device is smaller than the identifier length of the terminal device on the side link, thereby achieving the purpose of reducing the air interface overhead when the intermediate node schedules the terminal device on the side link.
  • a method for configuring an identifier includes: a terminal device sends a second association request message to an intermediate node, where the second association request message is used to request association to the intermediate node.
  • a terminal device sends a second association request message to an intermediate node to request association with the intermediate node, where the second association request message includes the SL UE ID.
  • the terminal device obtains the discovery message broadcast by the intermediate node, and determines that the intermediate node is the scheduling group head.
  • the terminal device can learn that the intermediate node is the scheduling group head of the scheduling terminal device.
  • the terminal device receives the identification of the terminal device sent by the intermediate node.
  • the number of bits occupied by the identifier of the terminal device is less than 24.
  • the identifier length of the terminal device is smaller than the identifier length of the terminal device on the side link, thereby achieving the purpose of reducing the air interface overhead when the intermediate node schedules the terminal device on the side link.
  • a method for configuring an identifier includes: a network device determines fourth indication information, where the fourth indication information is used to instruct an intermediate node to serve as a scheduling group header of a terminal device, and the scheduling group header is used for The terminal device schedules side link SL resources, wherein the fourth indication information includes an identifier set, and one identifier in the identifier set is an identifier of the terminal device; the network device sends to the intermediate node The fourth indication information.
  • the network device can instruct the intermediate node to be the scheduling group head and allocate the identifier set in advance.
  • the method before the network device determines the fourth indication information, the method further includes: the network device receives a request message sent by the intermediate node, and The request message is used to request the network device to set the intermediate node as the scheduling group head, or the request message is used to notify the network device that the intermediate node has the ability of the scheduling group head; or, The network device receives fifth indication information from the core network device, where the fifth indication information is used to indicate that the intermediate node is the scheduling group head.
  • the network device may indicate that the intermediate node is the scheduling group head with various prerequisites, and the network device instructs the intermediate node to provide the scheduling group head with a flexible determination scheme.
  • the number of bits occupied by the identifier of the terminal device is less than 24.
  • the identifier length of the terminal device is smaller than the identifier length of the terminal device on the side link, thereby achieving the purpose of reducing the air interface overhead when the intermediate node schedules the terminal device on the side link.
  • a method for configuring an identifier includes: an intermediate node receives fourth indication information sent by a network device, where the fourth indication information is used to indicate that the intermediate node serves as a scheduling group head of the terminal device, and the scheduling group header Used to schedule side link SL resources for the terminal device, wherein the fourth indication information includes an identifier set, and one of the identifier sets is an identifier of the terminal device; the intermediate node is based on The fourth indication information is determined to be the side uplink SL resource scheduled by the terminal device.
  • the method further includes: the intermediate node receiving the second association request message sent by the terminal device, the second association request message Used to request association to the intermediate node.
  • the intermediate node receives the second association request message from the terminal device, and learns that one or some terminal devices request association to the intermediate node, where the second association request message includes the SL UE ID.
  • the intermediate node broadcasts a discovery message, the discovery message is used to notify a terminal device, and the intermediate node is the scheduling group head.
  • the intermediate node notifies the terminal device that it is the scheduling group head by broadcasting.
  • the intermediate node sends a request message to the network device, and the request message is used to request the network device to set the intermediate node as the The scheduling group header, or the request message is used to notify the network device that the intermediate node has the scheduling group header capability.
  • the intermediate node sends sixth indication information to the core network device, where the sixth indication information is used to indicate that the intermediate node is a high-level group head.
  • the intermediate node there may be multiple prerequisites for the intermediate node to be the scheduling group head, and a flexible determination scheme is provided for the network device to determine the intermediate node as the scheduling group head.
  • the intermediate node sends an identifier of the terminal device to the terminal device.
  • the number of bits occupied by the identifier of the terminal device is less than 24.
  • the identifier length of the terminal device is smaller than the identifier length of the terminal device on the side link, thereby achieving the purpose of reducing the air interface overhead when the intermediate node schedules the terminal device on the side link.
  • a method for configuring an identifier includes: a terminal device sends a second association request message to an intermediate node, where the second association request message is used to request association to the intermediate node.
  • the terminal device sends a second association request message to the intermediate node, requesting to associate with the intermediate node.
  • the terminal device obtains the discovery message broadcast by the intermediate node, and determines that the intermediate node is the scheduling group head.
  • the terminal device can learn that the intermediate node is the scheduling group head of the scheduling terminal device.
  • the terminal device receives the identification of the terminal device sent by the intermediate node.
  • the number of bits occupied by the identifier of the terminal device is less than 24.
  • the identifier length of the terminal device is smaller than the identifier length of the terminal device on the side link, thereby achieving the purpose of reducing the air interface overhead when the intermediate node schedules the terminal device on the side link.
  • a data transmission device which is applied when a network device sends a data packet to a terminal device via an intermediate node, and includes: a processing unit configured to determine a first DCI and a first data packet; The DCI is processed through the identification of the terminal device, the first data packet includes a data packet sent to the terminal device; the sending unit is configured to send the first DCI and the first data packet to the intermediate node.
  • the processing unit before the processing unit determines the first DCI and the first data packet, the processing unit is further configured to assign the terminal device identifier to the terminal device; the sending unit, It is also used to send the identification of the terminal device to the intermediate node.
  • the apparatus before the processing unit determines the first DCI and the first data packet, the apparatus further includes: a receiving unit configured to receive the terminal device identifier sent by the intermediate node .
  • the sending unit is also used to send a handover request to the target network device, and the handover request is used to request the intermediate node and the terminal device to access the target network device, wherein:
  • the handover request carries the identity of the terminal device;
  • the receiving unit is also used to receive a handover response sent by the target network device, the handover response includes first indication information, the first indication information is used to indicate that the identity of the terminal device needs to be updated;
  • the sending unit further It is used to send a handover command to the intermediate node, the handover command is used to notify the intermediate node to access the target network device, where the handover command includes the first indication information.
  • the receiving unit is further configured to receive connection failure indication information sent by the intermediate node, and the connection failure indication information is used to indicate that the connection between the terminal device and the intermediate node fails .
  • the data transmission device provided in the thirteenth aspect and any possible implementation manner of the thirteenth aspect may be used to perform the operation of the network device in the first aspect and any possible implementation manner of the first aspect.
  • the data transmission device includes the means for performing the steps or functions described in the first aspect and any possible implementation of the first aspect.
  • the corresponding means may be the network device or the network in the first aspect. Chip or functional module inside the device.
  • the steps or functions can be realized by software, or by hardware, or by a combination of hardware and software.
  • a data transmission device including: a receiving unit, configured to receive a first DCI and a first data packet sent by a network device, the first DCI is processed via an identifier of the terminal device, and the first data packet Including a data packet sent to the terminal device; a processing unit for descrambling the first DCI based on the identification of the terminal device to obtain the first data packet; a sending unit for sending the third DCI and the first data packet to the terminal device; Three DCI is processed via the identification of the terminal device.
  • the processing unit before the receiving unit receives the first DCI and the first data packet sent by the network device, the processing unit is further configured to provide The device allocates the identification of the terminal device; the sending unit sends the identification of the terminal device to the network device.
  • the receiving unit before the network device determines the first DCI and the first data packet, the receiving unit is further configured to receive the terminal device sent by the network device Logo.
  • the receiving unit is further configured to receive a handover command sent by the network device, and the handover command is used to notify access to the target network device, wherein ,
  • the handover command includes first indication information, and the first indication information is used to indicate that the identity of the terminal device needs to be updated.
  • the sending unit is further configured to send connection failure indication information to the network device, where the connection failure indication information is used to instruct the terminal device to communicate with the network device. The connection between the intermediate nodes failed.
  • the data transmission device provided in the fourteenth aspect and any possible implementation manner of the fourteenth aspect may be used to perform the operation of the intermediate node in the second aspect and any possible implementation manner of the second aspect.
  • the device for data transmission includes means for executing the steps or functions described in the second aspect and any possible implementation of the second aspect.
  • the means may be the intermediate node or the intermediate node in the second aspect. Chip or functional module inside the node.
  • the steps or functions can be realized by software, or by hardware, or by a combination of hardware and software.
  • a data transmission device including: a receiving unit, configured to receive a third DCI and the first data packet sent by an intermediate node, the third DCI is processed through an identifier of a terminal device, The first data packet includes a data packet sent to the terminal device; the processing unit is configured to descramble the third DCI based on the identifier of the terminal device to obtain the first data packet.
  • the receiving unit before the receiving unit receives the third DCI and the first data packet sent by the intermediate node, the receiving unit is further configured to receive the intermediate node The sent identification of the terminal device; or, the receiving unit is further configured to receive the identification of the terminal device sent by the network device.
  • the receiving unit is configured to receive first indication information sent by the intermediate node, where the first indication information is used to indicate the identity of the terminal device need to be updated.
  • the data transmission device provided in the fifteenth aspect and any possible implementation manner of the fifteenth aspect may be used to perform the operation of the terminal device in the third aspect and any possible implementation manner of the third aspect.
  • the device for data transmission includes the means for executing the steps or functions described in the third aspect and any possible implementation of the third aspect.
  • the corresponding means may be the terminal device or the terminal in the third aspect. Chip or functional module inside the device.
  • the steps or functions can be realized by software, or by hardware, or by a combination of hardware and software.
  • a data transmission device which is applied when a network device sends data packets to N terminal devices via an intermediate node, and includes a processing unit for determining the second DCI and the second data packet, The second DCI is processed through the identifier of the intermediate node, the second data packet includes a data packet sent to N terminal devices, and N is a positive integer; the sending unit is configured to send the second data packet to the intermediate node DCI and the second data packet.
  • the processing unit before the processing unit determines the second DCI and the second data packet, the processing unit is further configured to allocate intermediate nodes to the intermediate nodes. The ID of the node.
  • the second DCI further includes second indication information for indicating the N terminal devices; or, the information of the second data packet
  • the MAC header is used to indicate the sizes of the data packets respectively sent to the N terminal devices in the N terminal devices and the second data packet.
  • the processing unit is further configured to allocate the identities of the N terminal devices to the N terminal devices; the sending unit is configured to send the intermediate The node sends the identities of the N terminal devices.
  • the apparatus further includes: a receiving unit configured to receive identities of the N terminal devices sent by the intermediate node.
  • the sending unit is configured to send a handover request to a target network device, and the handover request is used to request that the intermediate node and the N terminal devices Access to the target network device, the handover request carries the identities of the N terminal devices;
  • the receiving unit is configured to receive a handover response sent by the target network device, the handover response includes third indication information, and The third indication information is used to indicate that the identification of the terminal device among the N terminal devices needs to be updated;
  • the sending unit is used to send a handover command to the intermediate node, and the handover command is used to notify the intermediate node to access the For the target network device, the handover command includes the third indication information.
  • the receiving unit is configured to receive connection failure indication information sent by the intermediate node, and the connection failure indication information is used to indicate the N terminal devices The connection between the terminal device in and the intermediate node fails.
  • the data transmission device provided in the sixteenth aspect and any possible implementation manner of the sixteenth aspect may be used to perform the operation of the network device in the fourth aspect and any possible implementation manner of the fourth aspect.
  • the data transmission device includes the means for executing the steps or functions described in the fourth aspect and any possible implementation of the fourth aspect.
  • the corresponding means may be the network device or network in the fourth aspect. Chip or functional module inside the device.
  • the steps or functions can be realized by software, or by hardware, or by a combination of hardware and software.
  • a data transmission device which is applied when a network device sends data packets to N terminal devices via an intermediate node, and includes: a receiving unit for receiving the second DCI and the second DCI sent by the network device The second data packet, the second DCI is processed through the identifier of the intermediate node, the first data packet includes a data packet sent to N terminal devices, and N is a positive integer; the processing unit is used for processing based on the intermediate node Identify the descrambling of the second DCI; a processing unit, configured to determine to send the data in the second data packet to the N terminal devices respectively; a sending unit, configured to send the fourth DCI and the third DCI to the terminal device Data packet, the fourth DCI is processed via the identification of the terminal device, the third data packet includes data sent to the terminal device in the second data packet, wherein the terminal device is the Any one of the N terminal devices.
  • the receiving unit before the receiving unit receives the second DCI and the second data packet sent by the network device, the receiving unit is further configured to receive the network device The sent identifier of the intermediate node
  • the second DCI further includes second indication information for indicating the N terminal devices; the processing unit determines to transfer the first Sending the data in the second data packet to the N terminal devices respectively includes: the sending unit determines according to the second indication information to send the data in the second data packet to the N terminal devices respectively.
  • the MAC subheader of the second data packet is used to indicate that the N terminal devices and the second data packet are sent to the The size of the data packet of the N terminal devices; the processing unit determining to send the data in the second data packet to the N terminal devices respectively includes: the sending unit according to the MAC header of the second data packet Determine to send the data in the second data packet to the N terminal devices respectively.
  • the apparatus further includes: the processing unit allocates the identities of the N terminal devices to the N terminal devices; The network device sends the identities of the N terminal devices; or the receiving unit receives the identities of the N terminal devices sent by the network device.
  • the apparatus further includes: the receiving unit receives a handover command sent by the network device, where the handover command includes third indication information,
  • the third indication information is used to indicate that the identity of the terminal device among the N terminal devices needs to be updated.
  • the device further includes: the device further includes: the sending unit sends connection failure indication information to the network device, and the connection failure indication information is used for Indicating that the connection between the terminal device of the N terminal devices and the intermediate node fails.
  • the data transmission device provided in the seventeenth aspect and any possible implementation manner of the seventeenth aspect may be used to perform the operation of the intermediate node in the fifth aspect and any possible implementation manner of the fifth aspect.
  • the data transmission device includes the steps or functions corresponding to the steps or functions described in the fifth aspect and any possible implementation of the fifth aspect.
  • the means may be the intermediate nodes or intermediate nodes in the fifth aspect. Chip or functional module inside the node.
  • the steps or functions can be realized by software, or by hardware, or by a combination of hardware and software.
  • a data transmission device including: a receiving unit, configured to receive a fourth DCI and the third data packet sent by an intermediate node, where the fourth DCI is performed via an identifier of the terminal device Processing, the third data packet includes a data packet sent to the terminal device; a processing unit, configured to descramble the fourth DCI based on the identifier of the terminal device to obtain the third data packet.
  • the receiving unit before the receiving unit receives the fourth DCI and the third data packet sent by the intermediate node, the receiving unit is further configured to receive the The identifier of the terminal device sent by the intermediate node; or, the receiving unit receives the identifier of the terminal device sent by the network device.
  • the receiving unit receives third indication information sent by the intermediate node, and the third indication information is used to indicate that the terminal device needs to be identified Update.
  • the data transmission apparatus provided in the eighteenth aspect and any possible implementation manner of the eighteenth aspect may be used to execute the operation of the terminal device in the sixth aspect and any possible implementation manner of the sixth aspect.
  • the device for data transmission includes the means for executing the steps or functions described in the sixth aspect and any possible implementation of the sixth aspect.
  • the corresponding means may be the terminal device or the terminal in the sixth aspect. Chip or functional module inside the device.
  • the steps or functions can be realized by software, or by hardware, or by a combination of hardware and software.
  • an apparatus for configuring an identifier includes: a receiving unit configured to receive a first association request message sent by an intermediate node, the first association request message being used to request the network device to configure the identifier for a terminal device;
  • the sending unit is configured to send an association response message to the intermediate node, where the association response message includes the identifier of the terminal device.
  • the sending unit sends the fourth indication information to the intermediate node, where the fourth indication information is used to indicate that the intermediate node serves as the terminal device of at least one terminal device.
  • a scheduling group header where the scheduling group header is used to schedule side link SL resources for the at least one terminal device.
  • the receiving unit before the processing unit determines the fourth indication information, is further configured to receive a request message sent by the intermediate node, the request message Is used to request the processing unit to set the intermediate node as the scheduling group head, or the request message is used to notify the network device that the intermediate node has the capability of the scheduling group head; or, the The receiving unit receives fifth indication information of the core network device, where the fifth indication information is used to indicate that the intermediate node is the scheduling group head.
  • the number of bits occupied by the identifier of the terminal device is less than 24.
  • the data transmission device provided in the nineteenth aspect and any possible implementation manner of the nineteenth aspect may be used to perform the operation of the network device in the seventh aspect and any possible implementation manner of the seventh aspect.
  • the device for data transmission includes the means for performing the steps or functions described in the seventh aspect and any possible implementation of the seventh aspect.
  • the corresponding means may be the network device or network in the seventh aspect. Chip or functional module inside the device.
  • the steps or functions can be realized by software, or by hardware, or by a combination of hardware and software.
  • an apparatus for configuring an identifier includes: a sending unit, configured to send a first association request message to a network device, where the first association request message is used to request the network device to configure an identifier for a terminal device; receiving The unit is configured to receive an association response message sent by the network device, where the association response message includes the identification of the terminal device.
  • the receiving unit before the sending unit sends the first association request message to the network device, the receiving unit is further configured to receive the A first association request message, where the first association request message is used to request association to the intermediate node.
  • the receiving unit receives fourth instruction information sent by the network device, where the fourth instruction information is used to instruct the intermediate node as at least one terminal device
  • the scheduling group header is used to schedule side link SL resources for the at least one terminal device.
  • the sending unit broadcasts a discovery message
  • the discovery message is used to notify a terminal device
  • the intermediate node is the scheduling group head.
  • the sending unit sends a request message to the network device, and the request message is used to request the network device to set the intermediate node as the The scheduling group header, or the request message is used to notify the network device that the intermediate node has the scheduling group header capability.
  • the sending unit sends sixth indication information to a core network device, where the sixth indication information is used to indicate that the intermediate node is a high-level group head.
  • the sending unit sends the terminal device identifier to the terminal device.
  • the number of bits occupied by the identifier of the terminal device is less than 24.
  • the data transmission device provided in the twentieth aspect and any possible implementation manner of the twentieth aspect may be used to perform the operation of the intermediate node in the eighth aspect and any possible implementation manner of the eighth aspect.
  • the device for data transmission includes the means for performing the steps or functions described in the eighth aspect and any possible implementation of the eighth aspect.
  • the means may be the intermediate node or the intermediate node in the eighth aspect. Chip or functional module inside the node.
  • the steps or functions can be realized by software, or by hardware, or by a combination of hardware and software.
  • an apparatus for configuring an identifier includes: a sending unit configured to send a second association request message to an intermediate node, where the second association request message is used to request association to the intermediate node.
  • the device further includes: a receiving unit, configured to obtain a discovery message broadcast by the intermediate node, and determine that the intermediate node is a scheduling group head.
  • the receiving unit receives the identifier of the terminal device sent by the intermediate node.
  • the number of bits occupied by the identifier of the terminal device is less than 24.
  • the data transmission apparatus provided in the twenty-first aspect and any possible implementation manner of the twenty-first aspect may be used to perform the operation of the terminal device in the ninth aspect and any possible implementation manner of the ninth aspect.
  • the device for data transmission includes the means for executing the steps or functions described in the ninth aspect and any possible implementation of the ninth aspect.
  • the corresponding means may be the terminal device or the terminal in the ninth aspect. Chip or functional module inside the device.
  • the steps or functions can be realized by software, or by hardware, or by a combination of hardware and software.
  • an apparatus for configuring an identifier includes: a processing unit configured to determine fourth indication information, where the fourth indication information is used to instruct an intermediate node to serve as a scheduling group header of a terminal device, and the scheduling group header Used to schedule side link SL resources for the terminal device, wherein the fourth indication information includes an identifier set, and one identifier in the identifier set is an identifier of the terminal device; the sending unit is configured to Sending the fourth indication information to the intermediate node.
  • the apparatus before the processing unit determines the fourth indication information, further includes: a receiving unit, configured to receive a message sent by the intermediate node Request message, the request message is used to request the network device to set the intermediate node as the scheduling group header, or the request message is used to notify the network device that the intermediate node has the scheduling group header Or, the receiving unit receives fifth indication information from a core network device, where the fifth indication information is used to indicate that the intermediate node is the scheduling group head.
  • the number of bits occupied by the identifier of the terminal device is less than 24.
  • the data transmission device provided in the twenty-second aspect and any possible implementation manner of the twenty-second aspect may be used to perform the operation of the network device in the tenth aspect and any possible implementation manner of the tenth aspect.
  • the device for data transmission includes the means for executing the steps or functions described in the tenth aspect and any possible implementation of the tenth aspect.
  • the corresponding means may be the network equipment or network in the tenth aspect. Chip or functional module inside the device.
  • the steps or functions can be realized by software, or by hardware, or by a combination of hardware and software.
  • an apparatus for configuring an identifier includes: a receiving unit, configured to receive fourth indication information sent by a network device, where the fourth indication information is used to indicate that an intermediate node serves as a scheduling group head of a terminal device, so The scheduling group header is used to schedule side uplink SL resources for the terminal device, wherein the fourth indication information includes an identifier set, and one identifier in the identifier set is an identifier of the terminal device; processing Unit, configured to determine, according to the fourth indication information, to schedule a side link SL resource for the terminal device.
  • the receiving unit receives the second association request message sent by the terminal device, and the second association request message is used to request association To the intermediate node.
  • the apparatus further includes: a sending unit, configured to broadcast a discovery message, the discovery message being used to notify a terminal device, and the intermediate node is the Scheduling group header.
  • the sending unit sends a request message to the network device, and the request message is used to request the network device to set the intermediate node Is the scheduling group head, or the request message is used to notify the network device that the intermediate node has the scheduling group head capability.
  • the sending unit sends sixth indication information to the core network device, where the sixth indication information is used to indicate that the intermediate node is a high-level group head.
  • the sending unit sends an identifier of the terminal device to the terminal device.
  • the number of bits occupied by the identifier of the terminal device is less than 24.
  • the data transmission device provided in the twenty-third aspect and any possible implementation manner of the twenty-third aspect can be used to perform the operations of the intermediate node in the eleventh aspect and any possible implementation manner of the eleventh aspect .
  • the data transmission device includes means for performing the steps or functions described in the eleventh aspect and any possible implementation of the eleventh aspect.
  • the corresponding means may be the middle of the eleventh aspect.
  • the steps or functions can be realized by software, or by hardware, or by a combination of hardware and software.
  • an apparatus for configuring an identifier includes: a sending unit, configured to send a second association request message to an intermediate node, where the second association request message is used to request association to the intermediate node.
  • the device further includes: a receiving unit, configured to obtain a discovery message broadcast by the intermediate node to determine that the intermediate node is the scheduling group head.
  • the terminal device receives the identification of the terminal device sent by the intermediate node.
  • the number of bits occupied by the identifier of the terminal device is less than 24.
  • the data transmission device provided in the twenty-fourth aspect and any possible implementation manner of the twenty-fourth aspect can be used to perform the operation of the terminal device in the twelfth aspect and any possible implementation manner of the twelfth aspect .
  • the device for data transmission includes the means for executing the steps or functions described in the twelfth aspect and any possible implementation of the twelfth aspect.
  • the corresponding means may be the terminal in the twelfth aspect.
  • the steps or functions can be realized by software, or by hardware, or by a combination of hardware and software.
  • a communication device including a processor, a transceiver, and a memory, where the memory is used to store a computer program, and the transceiver is used to execute any one of the first to twelfth aspects.
  • the processor is used to call and run the computer program from the memory, so that the communication device executes the data transmission in any one of the possible implementation manners of the first to twelfth aspects Methods.
  • processors there are one or more processors and one or more memories.
  • the memory may be integrated with the processor, or the memory and the processor may be provided separately.
  • the transceiver includes a transmitter (transmitter) and a receiver (receiver).
  • a communication device including a transceiver, a processor, and a memory.
  • the processor is used to control the transceiver to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the communication device executes the first, fourth, seventh, and third aspects.
  • the tenth aspect and the method in any possible implementation of the first, fourth, seventh and tenth aspects.
  • a communication device including a transceiver, a processor, and a memory.
  • the processor is used to control the transceiver to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the communication device executes the second, fifth, eighth and first aspects.
  • a communication device including a transceiver, a processor, and a memory.
  • the processor is used to control the transceiver to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the communication device executes the third aspect, the sixth aspect, the ninth aspect, and the third aspect.
  • the twelfth aspect and the method in any possible implementation manner of the third, sixth, ninth, and twelfth aspects.
  • a system in a twenty-sixth aspect, includes the data transmission device provided in the thirteenth aspect to the twenty-fourth aspect.
  • a computer program product includes: a computer program (also called code, or instruction), which when the computer program is executed, causes the computer to execute the first to twelfth aspects above Any one of the possible implementation methods.
  • a computer program also called code, or instruction
  • a computer-readable medium stores a computer program (also called code, or instruction) when it runs on a computer, so that the computer executes the first to tenth The method in any one of the two possible implementation modes.
  • a computer program also called code, or instruction
  • a chip system including a memory and a processor, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that a communication device equipped with the chip system Perform the method in any one of the possible implementations of the first to twelfth aspects above.
  • FIG. 1 is a schematic diagram of a system 100 applicable to the data transmission method of the embodiment of the present application.
  • Figure 2 is a schematic diagram of an industrial control process.
  • Figure 3 is a schematic diagram of another industrial control process.
  • Figure 4 is a schematic diagram of another industrial control process.
  • Figure 5 is a schematic diagram of another industrial control process.
  • Fig. 6 is a schematic flowchart of a data transmission method provided in an embodiment of the present application.
  • Fig. 7 is a schematic diagram of a protocol stack provided by an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of another data transmission method provided in an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a second data packet structure provided by an embodiment of the present application.
  • FIG. 10 are schematic diagrams of another second data packet structure provided by an embodiment of the present application.
  • FIG. 11 is a schematic diagram of an intermediate node MAC layer processing a second data packet according to an embodiment of the present application.
  • FIG. 12 is a schematic diagram of a data packet sent by an intermediate node to a terminal device according to an embodiment of the present application.
  • FIG. 13 is a schematic flowchart of switching network devices provided by an embodiment of the present application.
  • FIG. 14 is a schematic flowchart of a terminal device connection failure provided by an embodiment of the present application.
  • FIG. 15 is a schematic diagram of a method for configuring an identifier provided by an embodiment of the present application.
  • FIG. 16 is a schematic diagram of another method for configuring an identifier provided by an embodiment of the present application.
  • FIG. 17 is a schematic diagram of the data transmission device 10 proposed in this application.
  • FIG. 18 is a schematic structural diagram of a terminal device 20 applicable to an embodiment of the present application.
  • FIG. 19 is a schematic diagram of the data transmission device 30 proposed in this application.
  • FIG. 20 is a schematic structural diagram of a network device 40 suitable for an embodiment of the present application.
  • FIG. 21 is a schematic diagram of the data transmission device 50 proposed in this application.
  • FIG. 22 is a schematic structural diagram of an intermediate node 60 applicable to an embodiment of the present application.
  • 5th generation (5G) systems and new radio (NR).
  • 5G 5th generation
  • NR new radio
  • the terminal equipment in the embodiments of this application may refer to user equipment, access terminals, user units, user stations, mobile stations, mobile stations, relay stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, users Agent or user device.
  • the terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and a wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or future evolution of the public land mobile network (PLMN) Terminal equipment, etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • PLMN public land mobile network
  • the data transmission method provided in the embodiments of this application can be applied in an industrial control scenario, and the terminal device involved in this application can be a device that executes an industrial process in industrial control, for example, an operating arm.
  • the embodiment of the application does not limit this.
  • the intermediate node in the embodiment of the present application may be any device with wireless transceiving function used to communicate with terminal devices.
  • the equipment includes, but is not limited to, the above-mentioned terminal equipment, relay nodes, local control nodes, control centers and other equipment including the functions of the application layer and the access layer.
  • the network device in the embodiment of the present application may be any device with a wireless transceiving function used to communicate with terminal devices.
  • This equipment includes but is not limited to: home base station (for example, Home evolved NodeB, or Home Node B, HNB), baseband unit (BBU), wireless fidelity (Wireless Fidelity, WIFI) system access point (Access Point, AP), wireless relay node, wireless backhaul node, transmission point (transmission point, TP) or transmission and reception point (transmission and reception point, TRP), etc.
  • home base station for example, Home evolved NodeB, or Home Node B, HNB
  • BBU baseband unit
  • WIFI wireless fidelity (Wireless Fidelity, WIFI) system access point
  • AP Access Point
  • wireless relay node wireless backhaul node
  • transmission point transmission point
  • TP transmission and reception point
  • TRP transmission and reception point
  • 5G such as NR, gNB in the system
  • TRP or TP transmission point
  • antenna panels including
  • the gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include an active antenna unit (AAU for short).
  • CU implements part of the functions of gNB
  • DU implements part of the functions of gNB.
  • the CU implements radio resource control (radio resource control, RRC) and packet data convergence protocol (packet data convergence protocol, PDCP) layer functions.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • the DU implements the functions of a radio link control (RLC) layer, a media access control (MAC) layer, and a physical (PHY) layer.
  • RLC radio link control
  • MAC media access control
  • PHY physical
  • the network device may be a device that includes one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into network devices in an access network (radio access network, RAN), which is not limited in this application.
  • the terminal device or the network device or the intermediate node includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the application do not specifically limit the specific structure of the execution subject of the methods provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided according to the embodiments of the application.
  • the execution subject of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or network device that can call and execute the program.
  • various aspects or features of the present application can be implemented as methods, devices, or products using standard programming and/or engineering techniques.
  • article of manufacture as used in this application encompasses a computer program accessible from any computer-readable device, carrier, or medium.
  • computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CD), digital versatile discs (DVD)) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
  • various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable storage medium” may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.
  • FIG. 1 is a schematic diagram of a system 100 applicable to the data transmission method of the embodiment of the present application. It includes a terminal device 101, a network device 102, and an intermediate node 103.
  • the network device 102 may include one antenna or multiple antennas.
  • antennas 104, 106, 108, 110, 112, and 114 may additionally include a transmitter chain and a receiver chain.
  • both the transmitter chain and the receiver chain may include multiple components related to signal transmission and reception (for example, a processor, modulator, multiplexer, demodulator, demultiplexer, or Antenna, etc.).
  • the network device 102 can communicate with the intermediate node 103. However, it is understood that the network device 102 can communicate with any number of intermediate nodes similar to the intermediate node 103.
  • the intermediate node 103 communicates with the network device 102 through antennas 112 and 114.
  • the antennas 112 and 114 send information to the intermediate node 103 through the forward link (also referred to as the downlink) 118, and receive information from the intermediate node 103 through the reverse link (also referred to as the uplink) 1720.
  • the terminal device 101 communicates with the network device 102 through the antennas 104 and 106.
  • the antennas 104 and 106 send information to the terminal device 101 through the forward link 124, and receive information from the terminal device 101 through the reverse link 126.
  • forward link 118 and reverse link 1720 may use different frequency bands
  • forward link 124 and reverse link 126 may use different frequency bands.
  • the forward link 118 and the reverse link 1720 can use a common frequency band, and the forward link 124 and the reverse The link 126 may use a common frequency band.
  • Each antenna (or antenna group composed of multiple antennas) and/or area designed for communication is referred to as a sector of the network device 102.
  • the antenna group may be designed to communicate with terminal devices in a sector of the area covered by the network device 102.
  • the network device can transmit signals to all terminal devices in its corresponding sector through a single antenna or multi-antenna transmit diversity.
  • the transmitting antenna of the network device 102 can also use beamforming to improve the signal-to-noise ratio of the forward links 118 and 124.
  • the network device 102, the terminal device 101, and the intermediate node 103 may be wireless communication sending devices and/or wireless communication receiving devices.
  • the wireless communication sending device can encode the data for transmission.
  • the wireless communication sending device can acquire (for example, generate, receive from other communication devices, or store in a memory, etc.) a certain number of data bits to be sent to the wireless communication receiving device through a channel.
  • Such data bits may be included in a transmission block (or multiple transmission blocks) of data, and the transmission block may be segmented to generate multiple code blocks.
  • the intermediate node 103 included in the system 100 may include one antenna or multiple antennas.
  • the intermediate node 103 can communicate with the terminal device 101.
  • the communication process is similar to the communication process between the network device 102 and the terminal device described above, and will not be repeated here.
  • the communication system 100 may be a PLMN network, a D2D network, an M2M network, an IoT network or other networks.
  • FIG. 1 is only a simplified schematic diagram of an example.
  • the communication system shown in FIG. 1 may also include other network devices and/or other networks.
  • the terminal equipment is not shown in Figure 1 for simplicity.
  • the communication system shown in Figure 1 can be a network device communicating with multiple terminal devices, that is, a single network device can transmit data or control signaling to a single or multiple terminal devices; or, the communication system shown in Figure 1 It may be that multiple network devices communicate with one terminal device, that is, multiple network devices can also simultaneously transmit data or control signaling for a single terminal device.
  • FIG. 1 is only a simple schematic diagram, which is used to illustrate the applicable scenarios of the data transmission method provided in the embodiment of the present application, and does not constitute any limitation to the present application.
  • FIG 2 is a schematic diagram of an industrial control process.
  • the action instructions of each production process are predictable.
  • the control center (CN) informs the operating arm to process a part, ten actions are required. The control center will notify the operating arm to complete these ten actions. After these ten actions are completed, one part is processed The work is over; the control center starts to notify the operating arm to process the next part, so the control center sends ten more messages to notify the operating arm to complete ten actions and process another part.
  • the signaling transmitted by the wireless network is very regular. In order to reduce the amount of data transmission between the control center and the base station, NodeX is introduced, and NodeX realizes to notify the terminal equipment to complete the above ten actions.
  • Figure 3 is a schematic diagram of another industrial control process.
  • NodeX knows in advance that ten actions need to be completed to process a part. Therefore, the control center only needs to notify the base station: please process the parts; after the base station receives the instruction, the base station informs NodeX: please process the parts; after NodeX receives the instruction, it divides the instruction into ten actions, generates ten messages and sends them to the operating arm. In this way, NodeX can be deployed closer to the operating arm, so that a large amount of data transmission occurs between NodeX and the operating arm, and the distance between NodeX and the operating arm is relatively short, so that wireless resources can be saved , Reduce the power of data transmission.
  • FIG. 3 is a schematic diagram of another industrial control process.
  • this kind of data is relatively urgent data, and the time delay requirement is relatively high.
  • the control center informs the operating arm to stop operation.
  • the processing of such forwarding data mainly adopts the method shown in FIG. 5 in order to ensure that the time delay requirement is met.
  • Figure 5 is a schematic diagram of another industrial control process.
  • the network equipment needs to know the RNTI of the terminal equipment, and the frequency used to transmit data between the network equipment and the terminal equipment is different from the frequency used to transmit data between NodeX and the terminal equipment.
  • the network equipment can directly Terminal equipment sends data without forwarding via NodeX, achieving the purpose of reducing time delay.
  • the terminal device needs to realize the communication with NodeX and the communication with the network device through two different frequency points at the same time, which increases the complexity of the terminal device and increases the price of the terminal device.
  • This application proposes a data transmission method.
  • Fig. 6 is a schematic flowchart of a data transmission method provided in an embodiment of the present application. The following describes the data transmission method shown in FIG. 6 from the perspective of interaction.
  • data transmission method provided in FIG. 6 can be applied to the above-mentioned industrial control network. Data transmission is required between the network device and the terminal device in the industrial control network, and the data is sent to the terminal device via an intermediate node.
  • the network device in Figure 6 When the network device in Figure 6 needs to send data to the terminal device, it will be forwarded to the terminal device through the intermediate node. Then the terminal device only needs to receive the data packet from the intermediate node, and does not need to receive both the data packet from the intermediate node and the data packet from the network device. For terminal equipment, the complexity of the terminal equipment is reduced.
  • the data transmission method includes the following steps:
  • the network device determines first downlink control information (downlink control information, DCI) and a first data packet.
  • DCI downlink control information
  • the network device when the network device has data to be sent to the terminal device, the network device packages the data to be sent to the terminal device into a first data packet, and the first data packet can be obtained based on the first DCI.
  • the first DCI is processed through the identification of the terminal device, or it can be said that the first DCI is scrambled through the identification of the terminal device.
  • the foregoing network device packages the data that needs to be sent to the terminal device into the first data packet, including the following possible situations:
  • the network device needs to send multiple data packets to the terminal device, and the multiple data packets are packaged into the first data packet and forwarded to the terminal device via the intermediate node.
  • the network device may package the data packet #1 and the data packet #2 into the aforementioned first data packet.
  • the network device needs to send a data packet to the terminal device. If the size of the data packet exceeds the air interface transmission capacity between the network device and the intermediate node, the network device transmits the data packet in segments, and the above-mentioned first data packet includes the Part of the data in the data packet.
  • the network device needs to send data packet #1 to the terminal device.
  • the size of data packet #1 is 200 bits, but the air interface transmission capacity between the network device and the intermediate node is 100 bits at a time, then the network device can transfer the data packet #1 is transmitted to the terminal device in segments, and 100 bits in the data packet #1 are packed into a first data packet, and the other 100 bits in the data packet #1 are packed into another first data packet.
  • the foregoing first DCI is used by the intermediate node to obtain the foregoing first data packet, that is, the first DCI corresponds to the first data packet. Both need to be sent to the intermediate node, execute S620, and the network device sends the first DCI and the first data packet to the intermediate node.
  • the first DCI is sent to the intermediate node through a physical downlink control channel (PDCCH); the first data packet is sent to the intermediate node through a physical downlink shared channel (PDSCH).
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • the intermediate node After receiving the first DCI and the first data packet, the intermediate node can descramble the first DCI, thereby obtaining the first data packet.
  • the premise that the intermediate node can descramble the first DCI is that the intermediate node knows the identifier of the above-mentioned terminal device. Specifically, in the embodiment shown in FIG. 6, the intermediate node knows the identifier of the above-mentioned terminal device through the following two methods: Possible solutions:
  • Solution 1 The intermediate node learns the above-mentioned terminal device identifier from the network device, and the method flow shown in FIG. 6 further includes S611, the network device assigns the terminal device identifier to the terminal device.
  • the terminal device can obtain its own identity directly from the network device through random access (RA) or other procedures.
  • RA random access
  • the method flow shown in FIG. 6 further includes S612.
  • the network device sends the terminal device to the intermediate node Logo.
  • the network device can know to notify the intermediate node of the identification of the terminal device through the pre-configuration information; or, the network device can also know that the terminal device is closest to the intermediate node through the measurement report reported by the terminal device, and then the terminal device The identifier of is notified to the intermediate node.
  • the intermediate node can learn the identity of the terminal device. Then, after the intermediate node receives the first DCI and the first data packet, the intermediate node can use the identity of the terminal device to descramble the first DCI to obtain the first data pack.
  • FIG. 6 only takes an intermediate node connected to a terminal device as an example for illustration.
  • an intermediate node can be connected to multiple terminal devices, and the network device can connect to multiple terminal devices connected to the intermediate node through the intermediate node.
  • the terminal devices send data separately.
  • the network device in the foregoing S611 can allocate terminal device identities to multiple terminal devices respectively.
  • the intermediate node when the solution shown in FIG. 6 is adopted, usually several terminal devices are accessed through the intermediate node, and the intermediate node needs to use the identifiers of several terminal devices to receive downlink data from the network device.
  • the search space corresponding to the identifier of each terminal device may be the same or different, which is not limited in this application.
  • Solution 2 The intermediate node allocates the terminal device identification to the terminal device, and notifies the terminal device identification to the network device, the method flow shown in FIG. 6 further includes S613, the intermediate node allocates the terminal device identification to the terminal device.
  • the method flow shown in FIG. 6 further includes S614, the intermediate node sends the terminal device identifier to the network device.
  • the same terminal device identification can be assigned to the multiple terminal devices.
  • the network device can simultaneously give multiple terminal devices via the intermediate node.
  • a terminal device sends data.
  • the intermediate node After the intermediate node receives the aforementioned first DCI and the first data packet, the intermediate node descrambles the first DCI to obtain the first data packet, that is, execute S630.
  • the network device may send the identities of the multiple terminal devices to the intermediate node in S612, or the intermediate node may allocate the identities of the terminal devices to the multiple terminal devices in S613.
  • the intermediate node may descramble the first DCI separately with the identities of multiple known terminal devices until the first DCI is correctly descrambled.
  • terminal device #1 and terminal device #2 are connected to the intermediate node.
  • the network device needs to send the first DCI #1 and the first data packet #1 to terminal device #1 and send to terminal device #2 respectively.
  • the first DCI #2 and the first data packet #2 are assigned terminal device identification #1 and terminal device identification #2 to terminal device #1 and terminal device #2, respectively.
  • the network device can assign terminal device identification #1 and terminal device identification #1 The identifier #2 is notified to the intermediate node.
  • the intermediate node When the intermediate node receives the first DCI#1 and the first data packet #1, it descrambles the first DCI#1 based on the terminal device’s identity #1 and the terminal device’s identity #2 respectively, where it is based on the terminal device’s identity # 1
  • the first DCI#1 can be successfully descrambled to obtain the first data packet #1.
  • the intermediate node does not parse the first data packet. It only needs to obtain the first data packet. Specifically, after receiving the first DCI and the first data packet, the intermediate node reads the first DCI on the PDCCH and descrambles the first DCI. When using the terminal device When the identity descrambling of the first DCI succeeds, knowing that the first data packet corresponding to the first DCI is the terminal device corresponding to the identity of the terminal device, the first data packet is directly sent to the terminal device, and S640 is executed. The third DCI and the first data packet are sent to the terminal device, and the third DCI is scrambled via the identification of the terminal device.
  • the downlink control information sent by the intermediate node to the terminal device may be directly referred to as DCI Or, it may also be referred to as sidelink downlink control information (SL DCI or SCI), etc.
  • the title of the control information sent by the intermediate node to the terminal device is not limited, but the control information is restricted from being scrambled by the identification of the terminal device.
  • the control information in this application can be carried by a physical control channel, including functions such as uplink and downlink resource allocation.
  • the data packet after the control information is correctly descrambled, the data packet can be received correctly.
  • the data packet in this application may also be referred to as a transmission block (TB).
  • the terminal device After receiving the third DCI and the first data packet, the terminal device descrambles the third DCI based on its own identifier to obtain the first data packet. That is, the embodiment shown in FIG. 6 further includes S641. The terminal device obtains the first data packet .
  • the protocol stack in the intermediate node is as shown in FIG. 7, which is a schematic diagram of a protocol stack provided by an embodiment of the present application. It can be seen from FIG. 7 that after receiving the TB sent by the network device, the intermediate node does not need to parse the TB. It only needs to descramble the first DCI correctly, obtain the TB, and then send the TB to the terminal device. The processing of the MAC layer and the RLC layer is not involved in the intermediate node, and only the PHY layer is forwarded, so that the TB can be quickly forwarded.
  • the network device shown in Figure 7 selects the appropriate modulation coding scheme (MCS), code rate and other parameters according to the wireless interface between the network device and the intermediate node, and uses the identification of the terminal device to generate the first DCI, send TB to the intermediate node.
  • MCS modulation coding scheme
  • the intermediate node uses the identification of the terminal device to perform a blind check. After receiving the data, as long as the cyclic redundancy check (CRC) check is correct and no processing is required, it will be based on the wireless interface between the intermediate node and the terminal device.
  • CRC cyclic redundancy check
  • Select appropriate MCS, code rate and other parameters use the terminal device identification addressing to generate the third DCI, and send the TB to the terminal device.
  • the intermediate node reads the data packet, and does not need to process the data packet at the MAC layer, RLC layer, etc., so the processing speed of the intermediate node fast.
  • the terminal device only needs to monitor the data packet sent by the intermediate node, and does not need to monitor the data packet sent by the network device and the intermediate node at the same time, which reduces the difficulty of the terminal device.
  • the first DCI sent by the network device to the intermediate node is processed through the identification of the terminal device.
  • This application also provides another method for implementing network devices to send data packets to terminal devices via intermediate nodes.
  • the DCI sent by the network devices to the intermediate nodes is processed via the identifier of the intermediate node. This solution will be described in detail below with reference to FIG. 8.
  • FIG. 8 is a schematic flowchart of another data transmission method provided in an embodiment of the present application. The following describes the data transmission method shown in FIG. 8 from the perspective of interaction.
  • data transmission method provided in FIG. 8 can be applied to the above-mentioned industrial control network.
  • Data transmission is required between the network equipment in the industrial control network and N terminal equipment.
  • the N terminal equipment and an intermediate node Phase connection.
  • the network device in Figure 8 When the network device in Figure 8 needs to send data to the terminal device, it will be forwarded to the terminal device through the intermediate node. Then the terminal device only needs to receive the data packet from the intermediate node, and does not need to receive both the data packet from the intermediate node and the data packet from the network device. For terminal equipment, the complexity of the terminal equipment is reduced.
  • the data transmission method includes the following steps:
  • S810 The network device determines the second DCI and the second data packet.
  • the network device when the network device has data to send to the terminal device, the network device packages the data that needs to be sent to the N terminal devices into a second data packet, and the first data packet can be obtained based on the second DCI.
  • the second DCI is processed through the identifier of the intermediate node, or it can be said that the second DCI is scrambled through the identifier of the intermediate node.
  • the aforementioned network device packs the data that needs to be sent to N terminal devices into a second data packet, including the following possible situations:
  • the network device needs to send multiple data packets to a terminal device, and the multiple data packets are packaged into a second data packet and forwarded to the terminal device via an intermediate node.
  • the network device may package the data packet #1 and the data packet #2 into the aforementioned second data packet.
  • the network device needs to send multiple data packets to multiple terminal devices.
  • the multiple data packets are packaged into a second data packet and forwarded to the terminal device via an intermediate node.
  • the network device can package data packet #1 and data packet #2 into the above-mentioned second data packet .
  • the network device needs to send a data packet to a terminal device. If the size of the data packet exceeds the air interface transmission capacity between the network device and the intermediate node, the network device transmits the data packet in segments, and the second data packet includes Part of the data in this packet.
  • the network device needs to send data packet #1 to the terminal device.
  • the size of data packet #1 is 200 bits, but the air interface transmission capacity between the network device and the intermediate node is 100 bits at a time, then the network device can transfer the data packet #1 is transmitted to the terminal device in segments, and 100 bits in data packet #1 are packed into a second data packet, and the other 100 bits in data packet #1 are packed into another second data packet.
  • the network device needs to send data packet #1 and data packet #2 to terminal device #1 and terminal device #2, respectively.
  • the sum of data packet #1 and data packet #2 exceeds the size between the network device and the intermediate node.
  • the network device transmits the data packet #1 and the data packet #2 in segments, and the aforementioned second data packet includes part of the data in the data packet #1 and part of the data in the data packet #2.
  • the network device needs to send data packet #1 and data packet #2 to terminal device #1 and terminal device #2, respectively.
  • the size of data packet #1 is 100 bits
  • the size of data packet #2 is 100 bits
  • the network The air interface transmission capacity between the device and the intermediate node is 100 bits at a time, then the network device can transmit data packet #1 to terminal device #1 in segments, and data packet #2 to terminal device #2 in segments, for example, transfer data Pack the 50 bits in packet #1 and the 50 bits in packet #2 into a second data packet, and pack the other 50 bits in packet #1 and the other 50 bits in packet #2 into another second data packet package.
  • the network device needs to send data packet #1 and data packet #2 to terminal device #1 and terminal device #2 respectively.
  • the sum of data packet #1 and data packet #2 exceeds the size between the network device and the intermediate node.
  • the network device transmits the data packet #1 and the data packet #2 respectively, and the aforementioned second data packet includes the data packet #1.
  • the network device needs to send data packet #1 and data packet #2 to terminal device #1 and terminal device #2, respectively.
  • the size of data packet #1 is 100 bits
  • the size of data packet #2 is 100 bits
  • the network The air interface transmission capacity between the device and the intermediate node is 100 bits at a time, and the network device can package data packet #1 into a second data packet, and data packet #2 into another second data packet.
  • the foregoing second DCI is used by the intermediate node to obtain the foregoing second data packet, that is, the second DCI corresponds to the second data packet.
  • Both need to be sent to the intermediate node, execute S820, and the network device sends the second DCI and the second data packet to the intermediate node.
  • the second DCI is sent to the intermediate node through the PDCCH; the second data packet is sent to the intermediate node through the PDSCH.
  • the intermediate node After receiving the second DCI and the second data packet, the intermediate node can descramble the second DCI, thereby obtaining the second data packet.
  • the premise that the intermediate node can descramble the second DCI is that the intermediate node knows the identifier of the intermediate node. Specifically, in the embodiment shown in FIG. 8, the intermediate node learns the identifier of the intermediate node from the network device. Then, the method flow shown in FIG. 8 further includes S811, the network device allocates the identifier of the intermediate node to the intermediate node.
  • the intermediate node can learn the identity of the intermediate node, then after the intermediate node receives the second DCI and the second data packet, the intermediate node can use the identity of the intermediate node to descramble the second DCI to obtain the second data packet , It is determined that the data in the second data packet needs to be sent to N terminal devices, that is, S830 is performed, the intermediate node descrambles the second DCI, divides the second data packet, and obtains N third data packets.
  • the detailed division process is as follows:
  • FIG. 8 is only an example where a network device is connected to an intermediate node.
  • a network device can be connected to multiple intermediate nodes, and the network device can be connected to the intermediate node through the multiple intermediate nodes. Multiple terminal devices to send data. Then, the network device in the foregoing S811 may allocate the identifiers of the intermediate nodes to multiple intermediate nodes respectively.
  • the intermediate node after receiving the second data packet, it also needs to send the data of the N terminal devices included in the second data packet to the N terminal devices respectively, that is, the intermediate node needs to determine which of the second data packets are The data is sent to that terminal device.
  • the intermediate node can determine the N terminal devices to which the data in the second data packet is respectively sent in the following two ways:
  • the second DCI also includes second indication information for indicating the N terminal devices.
  • the intermediate node determines to send the data in the second data packet to N terminal devices respectively.
  • FIG. 9 is a schematic diagram of a second data packet structure provided by an embodiment of the present application.
  • the second data packet sent by the network device includes data that the network device needs to send to terminal device #1 and terminal device #2, and the second DCI includes indicating terminal device #1 and terminal device # 2 second indication information.
  • the second DCI also includes indication information indicating the size and time-frequency position of the data packets respectively sent to the N terminal devices in the second data packet, or the data in the second data packet sent to the N terminal devices respectively The packet size and time-frequency position are preset and need not be additionally indicated by the indication information in the second DCI.
  • the intermediate node may divide the second data packet into N data packets based on the instruction of the second DCI and send them to the N terminal devices respectively.
  • the network device can package the data packet that needs to be sent to multiple terminal devices into a second data packet and send it to the intermediate node, and the intermediate node directly forwards it to the multiple terminal devices after simple processing.
  • the second data packet in the intermediate node does not need to be processed by the MAC layer and the RLC layer of the intermediate node.
  • Manner 2 The MAC subheader of the second data packet is used to indicate the size of the N terminal devices and the data packets respectively sent to the N terminal devices in the second data packet.
  • the MAC sub-header of the second data packet indicates which terminal devices the data in the second data packet is sent to, and the MAC sub-header also indicates the size of the data packet sent to each terminal device. .
  • FIG. 10 is a schematic diagram of another second data packet structure provided by an embodiment of the present application. It can be seen from FIG. 10 that the second data packet sent by the network device to the terminal device includes data that the network device needs to terminal device #1 and terminal device #2, and the MAC subheader of the second data packet indicates the second data The size of the data packet sent to terminal device #1 and terminal device #2 in the packet.
  • the intermediate node After the intermediate node receives the second DCI and the second data packet, if the CRC of the second data packet is correct, the second data packet is handed over to the MAC layer of the intermediate node for processing.
  • the MAC layer identifies which terminal devices the data packet in the second data packet is sent to, according to the logical channel identification (logical channel identify, LCH ID).
  • FIG 10(a) there are two logical channels corresponding to terminal device #1 (the two logical channels corresponding to RLC A and RLC B as shown in Figure 10(a)), corresponding to one of terminal device #2 Logical channel (the logical channel corresponding to RLC as shown in Figure 10(a)).
  • the upper MAC layer (MAC for UE1 and MAC for UE2 as shown in Figure 10(a)) is The MAC layer of the data packet corresponding to each terminal device, terminal device #1 and terminal device #2 each correspond to a MAC layer, the lower MAC layer (MAC for NodeX as shown in Figure 10(a)) is the network device and The MAC layer of the data packet of the interface between the intermediate nodes;
  • the MAC layer on the right corresponds to each terminal device
  • the MAC layer of the data packet, terminal device #1 and terminal device #2 each correspond to a MAC layer
  • the left MAC layer is the interface between the network device and the intermediate node
  • the MAC layer of the data packet that is, the MAC layer of the data packet of the interface between the network device and the intermediate node and the MAC layer of the data packet corresponding to each terminal device can be located in the same MAC layer at different locations in the MAC layer.
  • the downlink data sent to two terminal devices is packaged into a second data packet in the network device, and the second DCI is scrambled with the identifier of the intermediate node and then sent.
  • the physical layer in the intermediate node determines the CRC check of the second data packet After the error is correct, it is handed over to the MAC layer of the intermediate node for processing.
  • the MAC layer of the intermediate node recognizes the identification of the terminal device in the header of the second data packet, it divides the second data packet into two TBs, and the two TBs are respectively sent to two A terminal device.
  • the MAC layer of the intermediate node only processes the outer MAC sub-header, not the inner MAC sub-header.
  • FIG. 11 is a schematic diagram of an intermediate node MAC layer processing a second data packet according to an embodiment of the present application. After the MAC layer of the intermediate node as shown in Figure 11 processes the part shown in the dashed box, it can be determined that the second data packet is sent to terminal device #1 (UE1 as shown in Figure 11) and terminal device #2 (as shown in Figure 11). According to the data size of UE2) shown in 11, the second data packet is directly divided into two data packets and sent to terminal device #1 and terminal device #2 respectively.
  • FIG. 12 is a schematic diagram of a data packet sent by an intermediate node to a terminal device according to an embodiment of the present application.
  • the intermediate node after receiving the second DCI and the second data packet sent by the network device, the intermediate node determines that the data in the second data packet is sent to the N terminal devices. The node knows the identities of the N terminal devices. Similar to the first and second solutions shown in FIG. 6, in the method embodiment shown in FIG. 8, the intermediate node can learn the identifiers of the above N terminal devices through the following two possible solutions:
  • Solution 1 The intermediate node learns the above-mentioned N terminal equipment identities from the network equipment, and the method flow shown in FIG. 8 further includes S812, the network equipment allocates terminal equipment identities to the N terminal equipment.
  • each of the N terminal devices may directly obtain its own identity from the network device through RA or other procedures.
  • the method flow shown in FIG. 8 further includes S813, the network device sends to the intermediate node The identification of N terminal devices.
  • the network device can notify the intermediate node of the identification of the N terminal devices through pre-configuration information; or, the network device can also learn that the N terminal devices are closest to the intermediate node through the measurement report reported by the N terminal devices, The identification of the N terminal devices is notified to the intermediate node.
  • the intermediate node can learn the identities of the N terminal devices, then the second DCI and the second data packet are received at the intermediate node, and the data in the second data packet is sent to the N terminal devices. After that, the intermediate node may use the identities of the N terminal devices to scramble the N fourth DCIs respectively.
  • a possible implementation manner If the actions performed by multiple terminal devices are always the same, the same terminal device identification can be assigned to the multiple terminal devices. In this case, the network device can simultaneously give multiple The terminal device sends data.
  • the identifiers of the terminal devices respectively connected to the two intermediate nodes may be the same.
  • Solution 2 The intermediate node allocates terminal device identities to N terminal devices, and notifies the network device of the identity of the N terminal devices, the method flow shown in Figure 8 also includes S814, the intermediate node allocates terminals to the N terminal devices The identification of the device.
  • the method flow shown in FIG. 8 further includes S815.
  • the intermediate node sends the identification of N terminal devices to the network device. .
  • the intermediate node determines that the data in the second data packet is sent to N terminal devices respectively, that is, S840 is executed. Then the intermediate node decomposes the data in the second data packet into N data packets, and the N data packets are respectively sent to N terminal devices. Specifically, the N data packets correspond to N DCIs. Taking the intermediate node sending a data packet to any one of the N terminal devices as an example, the intermediate node sends the fourth DCI and the third data packet to the terminal device. The data included in the third data packet is the data included in the second data packet that needs to be sent to the terminal device.
  • the fourth DCI is used by the terminal device to obtain the third data packet, wherein the fourth DCI is via the terminal device’s identification Scrambled.
  • the terminal device After receiving the fourth DCI and the third data packet, the terminal device descrambles the fourth DCI based on its own identifier and obtains the first data packet. That is, the embodiment shown in FIG. 8 further includes S841. The terminal device obtains the third data packet .
  • FIG. 13 is a schematic flowchart of switching network devices provided by an embodiment of the present application.
  • the method for switching network equipment includes the following steps:
  • S1310 The source network device sends a handover request to the destination network device.
  • the source network device when the source network device decides to switch the intermediate node connected to itself and multiple terminal devices connected to the intermediate node to the destination network device, the source network device sends a switching request to the destination network device.
  • the handover request includes the identities of all terminal devices connected under the intermediate node.
  • the source network device is the network device shown in FIG. 6.
  • the network device sends a handover request to the target network device, the handover request is used to request the intermediate node and the terminal device to access the target network device, wherein the handover request carries the identification of the terminal device;
  • the source network device is the network device shown in FIG. 8.
  • the network device sends a handover request to the target network device.
  • the handover request is used to request the intermediate node and N terminal devices to access the target network device.
  • the handover request carries the identifiers of the N terminal devices.
  • S1320 The destination network device sends a handover response to the source network device.
  • the destination network device After the destination network device receives the handover request, it learns that there is a conflict between the identity of one or some terminal devices to be handed over and the identity of the terminal device connected to the current destination network device, and carries indication information in the handover response to notify the source The network device also indicates that the identification of one or some terminal devices under the source network device that needs to be switched to the destination network device needs to be updated.
  • the source network device is the network device shown in FIG. 6.
  • the handover response sent by the target network device to the network device carries first indication information, the first indication information is used to indicate that the identity of the terminal device needs to be updated; further, the first indication information carries the identity of the terminal device after the terminal device is updated For example, the first indication information indicates to update the RNTI#1 (YYYY) of the terminal device to RNTI#2 (ZZZZ);
  • the source network device is the network device shown in FIG. 8.
  • the target network device sends a handover response to the network device.
  • the handover response includes third indication information.
  • the third indication information is used to indicate that the identity of at least one of the N terminal devices needs to be updated. Specifically, the third indication information indicates that the terminal The RNTI#1 of the device #1 is updated to RNTI#2, and the RNTI#3 of the terminal device #2 is updated to RNTI#4.
  • S1330 The source network device sends a handover command to the intermediate node.
  • the handover command includes indication information indicating that the identification of one or some terminal devices is updated.
  • the switching command includes the above-mentioned first indication information
  • the switching command includes the above-mentioned third indication information
  • S1340 The intermediate node sends a handover instruction to the terminal device.
  • the switching instruction includes the first instruction information described above.
  • the switching instruction includes the third instruction information described above.
  • the intermediate node notifies terminal device #2 that the RNTI of terminal device #2 has changed from YYYY to ZZZZ.
  • the switching instruction can be notified to the terminal device #2 through RRC signaling or MAC CE.
  • the method flow shown in FIG. 8 further includes S1341: the terminal device updates the identification of the terminal device.
  • terminal device #2 receives a handover instruction that the RNTI of terminal device #2 is changed from YYYY to ZZZZ sent by the intermediate node, and terminal device #2 updates the locally stored RNTI YYYY of terminal device #2 to RNTI ZZZZ.
  • the intermediate node is connected to the destination network device to complete the switching process of the network device.
  • the terminal device connection failure may also occur, that is, one or more terminal devices connected to the intermediate node may experience a connection failure and cannot be successfully connected to the intermediate node.
  • the terminal device connected to the intermediate node fails to connect, what actions are performed by the intermediate node and the network device connected to the intermediate node.
  • FIG. 14 is a schematic flowchart of a terminal device connection failure provided by an embodiment of the present application.
  • the terminal device #2 of the N terminal devices connected by the intermediate node cannot be successfully connected with the intermediate node for some reason.
  • the method for terminal device connection failure includes the following steps:
  • the terminal device is any one of the N terminal devices connected to the intermediate node.
  • this application does not limit how the intermediate node determines that the terminal device has failed to connect. For example, it may be that the intermediate node fails to send data to the terminal device, or it is determined that the terminal device has failed based on the information reported by other terminal devices. normal work.
  • the intermediate node may send a connection recovery notification message to the network device for notifying the network device that the terminal device has resumed the connection and can communicate with the network device.
  • S1420 The intermediate node sends connection failure indication information to the network device.
  • connection failure indication information is used to indicate that the connection between the terminal device and the intermediate node fails.
  • the intermediate node periodically reports to the network device whether each terminal device connected to it is normally connected. If the intermediate node determines that a certain terminal device has failed to connect, it notifies the network device through the above-mentioned connection failure indication information, where the connection failure indication
  • the information can be carried in periodic report messages of intermediate nodes.
  • the network device stops sending instructions to the terminal device, and no longer transmits data to the terminal device whose connection fails through the intermediate node.
  • the intermediate node may also notify the network device of the current state of the terminal device, that is, the above-mentioned connection failure indication information may also include state information.
  • the status information may be at least one of the following information: which commands are currently received by the terminal device, which commands are received by the terminal device, which commands have not yet been received, the RLC status report of the terminal device, or the PDCP status report of the terminal device.
  • Figures 6 to 14 mainly introduce the process of network equipment forwarding data packets to terminal equipment via intermediate nodes, and the operations of network equipment and intermediate nodes when network equipment switching or terminal equipment connection failure may occur.
  • the following describes in detail how a network device in a sidelink (SL) configures an identifier for a terminal device in conjunction with FIG. 15 and FIG. 16.
  • SL sidelink
  • the communication between terminal devices is referred to as side link communication, which does not constitute any limitation to this application.
  • side link communication can also be called side link communication, direct link communication, or secondary link communication.
  • V2X vehicle-to-everything
  • LTE communication system involves the allocation of SL resources.
  • the SL resource allocation in LTE V2X mainly uses two methods, mode3 and mode4.
  • Mode3 means that the terminal device requests SL resources from the network device.
  • terminal device #1 has data to send to terminal device #2, it sends SL's buffer status report (BSR) to the network device.
  • the SL BSR contains the destination index and logic of the destination terminal device.
  • the identifier of the channel group (logical channel group, LCG) and the corresponding buffer size (buffer size).
  • LCG logical channel group
  • buffer size buffer size
  • the network device After the network device receives the SL BSR sent by the terminal device #1, it will allocate SL resources to the terminal device.
  • the network device allocates SL resources to terminal device #1 through the downlink control information (DCI) format 5A.
  • DCI format 5A is mainly used to schedule the physical sidelink control channel (PSCCH) .
  • the DCI format 5A includes the carrier indicator, the lowest subchannel ID allocated for the initial transmission, the SL ID, the SL semi-persistent scheduling (SPS) configuration ID, the activation/release indication, and the subsequent terminal device #1
  • the SL sends the parameters of sidelink control information (SCI) format 1 (frequency domain resources for initial transmission and retransmission, and time interval between initial transmission and retransmission).
  • SCI sidelink control information
  • terminal device #1 will include the following information in the SCI when SL sends data to terminal device #2: near field communication packet priority (prose per packet priority, PPPP), resource reservation, frequency of initial transmission and retransmission Domain resource location, time interval between initial transmission and retransmission, modulation and coding mechanism, and retransmission indication, etc.
  • near field communication packet priority prose per packet priority, PPPP
  • resource reservation frequency of initial transmission and retransmission Domain resource location
  • time interval between initial transmission and retransmission modulation and coding mechanism
  • retransmission indication etc.
  • the network device includes SL resource information in the broadcast message, for example, including sending resource pool information and receiving resource pool information.
  • the so-called resource pool may be a frequency domain resource composed of one or more radio resource blocks (resource block, RB), or a time-frequency domain resource composed of one or more RBs in a specific subframe or subframe set.
  • the terminal device When the terminal device has data to send, it selects and sends it in the sending resource pool by itself. In general, the terminal device will first perceive the transmission resource pool to obtain the received signal strength, and when the received signal strength is found to be below a certain threshold, the terminal chooses to send the data packet to be sent.
  • the terminal device finds the corresponding threshold according to the near field communication packet priority (prose per-packet priority, PPPP) of the data packet to be sent and the PPPP of the data packet currently being transmitted.
  • PPPP near field communication packet priority
  • the communication system includes terminal equipment and network equipment.
  • the terminal equipment can search for its own DCI format 5A sent by the network equipment to obtain the SL resource.
  • the scheduling group header (the intermediate node mentioned above)
  • the terminal equipment has data to send, it can apply for SL resources to the scheduling group header.
  • the current SL communication system does not specify a method for intermediate nodes to allocate SL resources to other terminal devices.
  • the transmission direction from the scheduling group header to the terminal device is called downlink transmission
  • the transmission direction from the terminal device to the scheduling group header is uplink transmission
  • the transmission direction from the terminal device to the terminal device is parallel transmission.
  • the terminal device may apply for resources from the scheduling group header for non-uplink transmission.
  • the frequency domain resource location of the initial transmission and retransmission, the time interval of the initial transmission and retransmission, etc. included in the original SCI are called downlink SL resources.
  • the scheduling group header may include non-uplink SL resources in addition to downlink SL resources when sending SCI. For example, the frequency domain resource location of non-uplink initial transmission and retransmission, and the time interval of non-uplink initial transmission and retransmission, etc.
  • the scheduling group header contains non-uplink SL resources for multiple terminal devices in the SCI, the identification of the terminal device needs to be introduced.
  • FIG. 15 is a schematic diagram of a method for configuring an identifier provided by an embodiment of the present application. It is assumed that the network device and the intermediate node communicate through the cellular network air interface, that is, the intermediate node is a terminal device relative to the network device. The intermediate node and the terminal device communicate through the sidelink, and the intermediate node is a sidelink scheduling group head relative to the terminal device.
  • the method for configuring identification includes the following steps:
  • S1510 The network device receives the first association request message sent by the intermediate node.
  • the first association request message is used to request the network device to configure an identifier for the terminal device.
  • the intermediate node carries the first association request message in an uplink (UL) RRC message, and the first association request message includes the sidelink user equipment identify (SL UE ID) of the terminal device. ).
  • UL uplink
  • SL UE ID sidelink user equipment identify
  • the intermediate node before the intermediate node sends the first association request message to the network device, it will receive the second association request message from the terminal device on the side link. Then, the method flow shown in FIG. 15 further includes S1520, the terminal device sends a second association request message to the intermediate node.
  • the SL MAC header sent by the SL to the intermediate node includes the SL UE ID, that is, the identification of the terminal device on the side link, and the SL UE ID may be referred to as the ProSe UE ID.
  • the difference between the above-mentioned SL UE ID and the identification of the terminal device allocated by the network device to the terminal device in this application includes: the SL UE ID is generally 24 bits.
  • the intermediate node uses the SL UE ID to allocate resources for the terminal device, including the SL UE ID in the SCI occupies too many air interface resources and causes waste.
  • This article assumes that the network device allocates an intermediate node to the terminal device to identify the terminal device's identity, so as to reduce air interface overhead. For example, when an intermediate node manages 30 terminal devices, only 5 bits are enough to identify one terminal device.
  • the intermediate node can divide the 24 bits in the data packet that can be used to identify the terminal device into 8 bits and 16 bits, where the 8 bits are carried in the SCI to identify the terminal Device, 16bit is included in the MAC header of the data packet for other functions (this application does not limit the use of saved bits).
  • the terminal device does not need to read the 16bit in the MAC header to know whether it is sending Give your own data, thereby reducing the processing complexity on the terminal device side.
  • the method flow shown in FIG. 15 also includes a flow in which the intermediate node determines itself as the scheduling group head. Then the method flow shown in FIG. 15 further includes, S1511, the network device sends fourth instruction information to the intermediate node.
  • the fourth indication information is used to indicate that the intermediate node is a scheduling group header of at least one terminal device, and the scheduling group header is used to schedule a side link SL resource for at least one terminal device.
  • the network device may carry the fourth indication information in the RRC reconfiguration message.
  • the network device in the method flow shown in FIG. 15, before the network device sends the fourth indication information to the intermediate node, it needs to determine that the intermediate node is the aforementioned scheduling group head.
  • the network device in the embodiment of the present application may determine that the intermediate node is the scheduling group head in any of the following possible ways:
  • the intermediate node applies to the network device to become the scheduling group head, or the intermediate node reports to the network device that it has the ability to be the scheduling group head.
  • the method flow shown in FIG. 15 further includes S1512.
  • the intermediate node sends a request message to the network device.
  • the request message is used to request the network device to set the intermediate node as the scheduling group head, or the request message is used to notify the network device
  • the intermediate node has the ability to schedule the group head, or the intermediate node has the function of SL resource allocation and scheduling.
  • Method 2 The core network notifies the intermediate node of the network device to be the head of the scheduling group.
  • the method process shown in FIG. 15 further includes S1513.
  • the intermediate node sends sixth indication information to the core network device, and the sixth indication information is used to indicate that the intermediate node is the high-level group head.
  • the method process shown in FIG. 15 also includes S1514, the core network device authenticates, and the core network device authenticates that the intermediate node is the high-level group head successfully.
  • the intermediate node includes the sixth indication information in the non-access stratum (NAS) message indicating that the intermediate node is the high-level group header; the method process shown in FIG.
  • NAS non-access stratum
  • S1515 after the core network device is successfully authenticated , Send fifth indication information to the network device, where the fifth indication information is used to indicate that the intermediate node is the scheduling group head.
  • the access and mobility management function (AMF) network element sends fifth indication information to the gNB, indicating that the intermediate node is the high-level group header, and the subsequent gNB sets the high-level group header as the scheduling group header as needed.
  • AMF access and mobility management function
  • the method flow shown in FIG. 15 also includes S1516.
  • the intermediate node broadcasts the discovery message, and the intermediate node broadcasts the discovery message in the SL Message, the discovery message contains the scheduling group header indication and may also contain the group identification of the high-level group where the intermediate node is located.
  • S1530 The network device sends an association response message to the intermediate node.
  • the association response message includes the identification assigned by the network device to the terminal device.
  • the RRC reconfiguration message carries the association response message.
  • the association response message includes the terminal equipment identification (user equipment identify, UE ID) allocated to the terminal equipment, and the association response message may also include the terminal equipment identification on the side link and the corresponding UE ID.
  • S1540 The intermediate node sends the UE ID to the terminal device.
  • the intermediate node After receiving the association response message, the intermediate node determines the UE ID, and forwards the UE ID to the terminal device to complete the UE ID configuration for the terminal device. For example, after obtaining the identification of the terminal device on the side link and the corresponding UE ID, the intermediate node sends the UE ID through the side link to the terminal device corresponding to the identification of the terminal device on the side link.
  • the terminal device After completing the identification configuration of the terminal device, the terminal device optionally sends a scheduling request (scheduling request, SR) or BSR to the intermediate node in the SL.
  • the SL scheduling result sent by the intermediate node to the terminal device includes the identification of the terminal device and the corresponding SL time-frequency resource.
  • the intermediate node includes one or more terminal device identifiers and corresponding SL time-frequency resources in the SCI.
  • FIG. 16 is a schematic diagram of another method for configuring an identifier provided by an embodiment of the present application.
  • the method for configuring identification includes the following steps:
  • S1610 The network device sends fourth indication information to the intermediate node.
  • the fourth indication information is used to indicate that the intermediate node serves as the scheduling group header of the terminal device, and the scheduling group header is used to schedule side link SL resources for the terminal device.
  • the fourth indication information includes an identification set, and the identification in the identification set includes The identification of the terminal device.
  • the network device before sending the fourth indication information to the intermediate node, the network device needs to determine that the intermediate node is the foregoing scheduling group head. Specifically, the network device in the embodiment of the present application may determine that the intermediate node is the scheduling group head in any of the following possible ways:
  • Manner 1 It is similar to Manner 1 involved in S1511 in Figure 15, and will not be repeated here. It is similar to FIG. 15. In this manner, the method flow shown in FIG. 16 further includes S1611, where the intermediate node sends a request message to the network device.
  • Manner 2 It is similar to Manner 2 involved in S1511 in Fig. 15, and will not be repeated here. It is similar to FIG. 15. In this mode, the method flow shown in FIG. 16 also includes S1612.
  • the intermediate node sends the sixth indication information and S1613 to the core network device.
  • the core network device performs authentication and S1614. After the core network device is successfully authenticated, Send the fifth instruction information to the network device.
  • the method flow shown in FIG. 16 also includes S1615.
  • the intermediate node broadcasts the discovery information, and the intermediate node broadcasts the information in the SL Discovery message.
  • the discovery message contains a scheduling group header indication and may also contain the group identifier of the high-level group where the intermediate node is located.
  • the intermediate node may configure the identification for the terminal device.
  • the method flow shown in FIG. 16 further includes S1620: the terminal device sends a second association request message to the intermediate node.
  • the terminal device includes the SL UE ID in the SL MAC header sent by the SL to the intermediate node, and the SL UE ID may be called the ProSe UE ID.
  • S1630 The intermediate node determines the identity of the terminal device.
  • the intermediate node selects an identifier from the identifier set allocated by the network device in S1610 as the terminal device identifier.
  • the intermediate node sends the terminal device identifier to the terminal device.
  • the intermediate node finishes configuring the identity for the terminal device.
  • the terminal device After completing the identification configuration of the terminal device, the terminal device optionally sends the SR or BSR to the intermediate node in the SL.
  • the SL scheduling result sent by the intermediate node to the terminal device includes the identification of the terminal device and the corresponding SL time-frequency resource.
  • the intermediate node includes one or more terminal device identifiers and corresponding SL time-frequency resources in the SCI.
  • the data transmission method provided by the embodiment of the present application is described in detail above with reference to FIGS. 6-14, and the method for configuring identifiers provided by the embodiment of the present application is described in detail with reference to FIG. 15 and FIG. 16. Introduce the data transmission device provided in the embodiment of this application.
  • FIG. 17 is a schematic diagram of the data transmission device 10 proposed in this application.
  • the device 10 includes a receiving unit 1710, a processing unit 1720, and a sending unit 1370.
  • the receiving unit 1710 is configured to receive the third DCI and the first data packet sent by the intermediate node, where the third DCI is processed via the identifier of the terminal device, and the first data packet includes the Data packets of terminal equipment;
  • the processing unit 1720 is configured to descramble the third DCI based on the identifier of the terminal device to obtain the first data packet.
  • the device 10 is completely corresponding to the terminal device in the method embodiment, and the device 10 may be the terminal device in the method embodiment, or a chip or functional module inside the terminal device in the method embodiment.
  • the corresponding units of the apparatus 10 are used to execute the corresponding steps executed by the terminal device in the method embodiments shown in FIGS. 6-16.
  • the receiving unit 1710 in the apparatus 10 executes the steps of the terminal device receiving in the method embodiment. For example, perform step S611 in FIG. 6 to receive the identification of the terminal device allocated by the network device, or perform step S613 in FIG. 6 to receive the identification of the terminal device allocated by the intermediate node; also execute step S640 in FIG. 6 to receive The third DCI and the first data packet sent by the intermediate node; Step S812 in FIG. 8 is also executed to receive the identification of the terminal device allocated by the network device, or Step S814 in FIG.
  • step S840 in Figure 8 to receive the fourth DCI and third data packets sent by the intermediate node; also perform step S1340 in Figure 13 to receive the handover instruction sent by the intermediate node; also perform step S1516 in Figure 15 , Receive the discovery message broadcast by the intermediate node; also perform step S1540 in Figure 15 to receive the identification of the terminal device sent by the intermediate node; also perform step S1615 in Figure 16 to receive the discovery message broadcast by the intermediate node; also perform step S1540 in Figure 16 In step S1640, the identification of the terminal device sent by the intermediate node is received.
  • the processing unit 1720 in the apparatus 10 executes the steps implemented or processed inside the terminal device in the method embodiment. For example, step S641 in FIG. 6 is executed to obtain the first data packet; step S841 in FIG. 6 is also executed to obtain the third data packet; step S1341 in FIG. 13 is also executed to update the identification of the terminal device.
  • the sending unit 1730 in the device 10 executes the steps sent by the terminal device in the method embodiment. For example, step S1520 in FIG. 15 is executed to send a second association request message to the intermediate node, and step S1620 in FIG. 16 is executed to send a second association request message to the intermediate node.
  • the receiving unit 1710 and the sending unit 1730 may constitute a transceiver unit, and have the functions of receiving and sending at the same time.
  • the processing unit 1720 may be a processor.
  • the transmitting unit 1730 may be a receiver.
  • the receiving unit 1710 may be a transmitter. The receiver and transmitter can be integrated to form a transceiver.
  • FIG. 18 is a schematic structural diagram of a terminal device 20 applicable to an embodiment of the present application.
  • the terminal device 20 can be applied to the system shown in FIG. 1.
  • FIG. 18 only shows the main components of the terminal device.
  • the terminal device 20 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is used to control the antenna and the input and output device to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory to execute the corresponding process executed by the terminal device in the data transmission method proposed in this application And/or operation. I won't repeat them here.
  • FIG. 18 only shows a memory and a processor. In actual terminal devices, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.
  • FIG. 19 is a schematic diagram of the data transmission device 30 proposed in this application.
  • the device 30 includes a processing unit 1910, a sending unit 1920, and a receiving unit 1930.
  • the processing unit 1910 is configured to determine a first DCI and a first data packet, where the first DCI is processed via an identifier of a terminal device, and the first data packet includes a data packet sent to the terminal device;
  • the sending unit 1920 is configured to send the first DCI and the first data packet to the intermediate node.
  • the apparatus 30 completely corresponds to the network equipment in the method embodiment, and the apparatus 30 may be the network equipment in the method embodiment, or a chip or functional module inside the network equipment in the method embodiment.
  • the corresponding unit of the device 30 is used to execute the corresponding steps executed by the network device in the method embodiments shown in FIGS. 6-16.
  • processing unit 1910 in the device 30 executes the steps implemented or processed inside the network device in the method embodiment. For example, step S610 in FIG. 6 is executed to determine the first DCI and the first data packet; step S810 in FIG. 8 is also executed to determine the second DCI and the second data packet.
  • the sending unit 1920 in the apparatus 10 executes the steps of the network device sending in the method embodiment. For example, perform step S611 in FIG. 6 to assign the terminal device identifier to the terminal device; also perform step S620 in FIG. 6 to send the first DCI and the first data packet to the intermediate node; also perform step S812 in FIG.
  • the terminal device is assigned the identifier of the terminal device; step S811 in FIG. 8 is also performed to assign the identifier of the intermediate node to the intermediate node; step S820 in FIG. 8 is also performed to send the second DCI and the second data packet to the intermediate node; Step S1320 in FIG. 13 is executed to send a switching command to the intermediate node.
  • the apparatus 30 may also be the destination network device in FIG.
  • step S1320 in FIG. 13 to send the switching command to the source network device.
  • Response also perform step S1511 in Figure 15 to send the fourth instruction information to the intermediate node; also perform step S1530 in Figure 15 to send an association response message to the intermediate node; also perform step S1610 in Figure 16 to send to the intermediate node Fourth instruction information.
  • the receiving unit 1930 in the apparatus 10 executes the steps of the network device receiving in the method embodiment. For example, step S614 in FIG. 6 is executed to receive the identification of the terminal device sent by the intermediate node; step S815 in FIG. 8 is also executed to receive the identification of N terminal devices sent by the intermediate node; specifically, the apparatus 30 may also be 13, the receiving unit 1930 also performs step S1320 in FIG. 13 to receive the handover response sent by the destination network device; also performs step S1420 in FIG.
  • Step S1512 in Figure 15 is to receive the request message sent by the intermediate node;
  • Step S1510 in Figure 15 is also executed to receive the first association request message sent by the intermediate node;
  • Step S1611 in Figure 16 is also executed to receive the request sent by the intermediate node Message;
  • Step S1614 in Figure 16 is also performed to receive the fifth indication information sent by the core network device.
  • the receiving unit 1930 and the sending unit 1920 may constitute a transceiver unit, and have both receiving and sending functions.
  • the processing unit 1910 may be a processor.
  • the transmitting unit 1920 may be a receiver.
  • the receiving unit 1930 may be a transmitter. The receiver and transmitter can be integrated to form a transceiver.
  • FIG. 20 is a schematic structural diagram of a network device 40 applicable to an embodiment of the present application, which can be used to implement the functions of the network device in the above-mentioned data transmission method.
  • a network device 40 can be a schematic structural diagram of a base station.
  • the network device can be applied to the system shown in Figure 1.
  • the network device 40 may include one or more radio frequency units, such as a remote radio unit (RRU) 2001 and one or more base band units (BBU).
  • the baseband unit may also be referred to as a digital unit (DU) 2002.
  • the RRU 2001 may be called a transceiver unit, and corresponds to the receiving unit 1930 and the sending unit 1920 in FIG. 19.
  • the transceiver unit 2001 may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 2011 and a radio frequency unit 2012.
  • the transceiver unit 2001 may include a receiving unit and a transmitting unit, the receiving unit may correspond to a receiver (or receiver, receiving circuit), and the transmitting unit may correspond to a transmitter (or transmitter or transmitting circuit).
  • the RRU 2001 part is mainly used for the transmission and reception of radio frequency signals and the conversion between radio frequency signals and baseband signals, for example, for sending the control information described in the foregoing embodiments to terminal devices.
  • the 2002 part of the BBU is mainly used for baseband processing and control of the base station.
  • the RRU 2001 and the BBU 2002 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the BBU 2002 is the control center of the network equipment, and may also be called a processing unit, which may correspond to the processing unit 1930, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading.
  • the BBU (processing unit 1910) 2002 may be used to control the network device 40 to execute the operation procedure of the network device in the foregoing method embodiment, for example, to determine the length of the symbol carrying the control information of the terminal device.
  • the BBU 2002 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network of a single access standard (for example, an LTE system or a 5G system), or may separately support Wireless access networks of different access standards.
  • the BBU 2002 also includes a memory 2021 and a processor 2022.
  • the memory 2021 is used to store necessary instructions and data.
  • the memory 2021 stores the codebook and the like in the foregoing embodiment.
  • the processor 4022 is used to control the base station to perform necessary actions, for example, to control the base station to execute the operation procedure of the network device in the foregoing method embodiment.
  • the memory 2021 and the processor 2022 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.
  • the above-mentioned BBU 2002 can be used to perform the actions described in the previous method embodiments implemented by the network device, and the RRU 2001 can be used to perform the actions described in the previous method embodiments that the network device sends to or receives from the terminal device.
  • the RRU 2001 can be used to perform the actions described in the previous method embodiments that the network device sends to or receives from the terminal device.
  • the network equipment is not limited to the form shown in FIG. 20, and may also be in other forms: for example, including BBU and adaptive radio unit (ARU), or including BBU and active antenna unit (AAU). ); It can also be customer premises equipment (CPE), or other forms, which are not limited in this application.
  • BBU and adaptive radio unit ARU
  • BBU and active antenna unit AAU
  • CPE customer premises equipment
  • the network device 40 shown in FIG. 20 can implement the network device functions involved in the method embodiments of FIGS. 6-16.
  • the operations and/or functions of each unit in the network device 40 are respectively for implementing the corresponding process executed by the network device in the method embodiment of the present application. To avoid repetition, detailed description is omitted here.
  • the structure of the network device illustrated in FIG. 20 is only a possible form, and should not constitute any limitation in the embodiment of the present application. This application does not exclude the possibility of other network device structures that may appear in the future.
  • the network equipment in the above device embodiments corresponds to the network equipment or terminal equipment in the terminal equipment and method embodiments, and the corresponding modules or units execute the corresponding steps.
  • the communication unit transmits the receiving or sending in the method embodiments.
  • other steps can be executed by the processing unit (processor).
  • the processing unit processor
  • FIG. 21 is a schematic diagram of a data transmission device 50 proposed in this application.
  • the device 50 includes a receiving unit 2110, a processing unit 2120, and a sending unit 2130.
  • the receiving unit 2110 is configured to receive a first DCI and a first data packet sent by the network device, where the first DCI is processed via an identifier of the terminal device, and the first data packet includes data sent to the terminal device package;
  • the processing unit 2120 is configured to descramble the first DCI based on the identifier of the terminal device to obtain the first data packet;
  • the sending unit 2130 is configured to send a third DCI and the first data packet to the terminal device, where the third DCI is processed via the identifier of the terminal device.
  • the device 50 completely corresponds to the intermediate node in the method embodiment, and the device 50 may be the intermediate node in the method embodiment, or a chip or functional module inside the intermediate node in the method embodiment.
  • the corresponding unit of the device 50 is used to execute the corresponding steps performed by the intermediate node in the method embodiments shown in FIGS. 6-16.
  • the receiving unit 2110 in the device 50 executes the steps of receiving by the intermediate node in the method embodiment. For example, perform step S612 in FIG. 6 to receive the identification of the terminal device sent by the network device; also perform step S620 in FIG. 6 to receive the first DCI and the first data packet sent by the network device; and also perform the step in FIG. 8 S811: Receive the identifier of the intermediate node sent by the network device; also perform step S813 in FIG. 8 to receive the identifiers of N terminal devices sent by the network device; also perform step S820 in FIG.
  • Step S1620 in FIG. 16 is executed to receive the second association request message sent by the terminal device.
  • the processing unit 2120 in the device 50 executes the steps implemented or processed internally by the intermediate node in the method embodiment. For example, perform step S630 in FIG. 6 to descramble the first DCI to obtain the first data packet; also perform step S830 in FIG. 8 to descramble the second DCI and decompose the second data packet; also perform step S1410 in FIG. 14 , It is determined that the connection of the terminal device fails; step S1630 in FIG. 16 is also executed to determine the identity of the terminal device.
  • the sending unit 2130 in the device 50 executes the steps sent by the intermediate node in the method embodiment. For example, perform step S613 in FIG. 6 to send the identification of the terminal device to the network device; also perform step S613 in FIG. 6 to assign the identification of the terminal device to the terminal device; also perform step S640 in FIG. 6 to send the terminal device
  • the third DCI and the first data packet; Step S815 in FIG. 8 is also executed to send N terminal device identities to the network device; Step S814 in FIG.
  • Step S840 in 8 is also executed to assign terminal device identities to the terminal device; Step S840 in 8, send the fourth DCI and the third data packet to the terminal device; also execute step S1340 in Figure 13 to send a switching instruction to the terminal device; also execute step S1420 in Figure 14 to send the connection failure to the network device Instruction information; also perform step S1512 in FIG. 15 to send a request message to the network device, or perform step S1513 in FIG. 15 to send sixth instruction information to the core network device; also perform step S1510 in FIG. 15, Send the first association request message to the network device; also perform step S1540 in FIG. 15 to send the terminal device identifier to the terminal device; also perform step S1611 in FIG. 16 to send the request message to the network device, or perform FIG. 16 Step S1612 in S1612 is to send the sixth indication information to the core network device; Step S1640 in FIG. 16 is also executed to send the terminal device identifier to the terminal device.
  • the receiving unit 2110 and the sending unit 2130 may constitute a transceiver unit, and have both receiving and sending functions.
  • the processing unit 2120 may be a processor.
  • the sending unit 2130 may be a receiver.
  • the receiving unit 2110 may be a transmitter. The receiver and transmitter can be integrated to form a transceiver.
  • FIG. 22 is a schematic structural diagram of an intermediate node 60 applicable to an embodiment of the present application.
  • the intermediate node 60 can be applied to the system shown in FIG. 1.
  • FIG. 22 only shows the main components of the intermediate node.
  • the device 60 may include a processing unit 610 (that is, an example of the processing unit 520 in FIG. 21) and a storage unit 2220.
  • the storage unit 2220 is used to store instructions.
  • the processing unit 2210 is configured to execute the instructions stored in the storage unit 2220, so that the device 60 implements the steps performed by the intermediate node in the above method.
  • the device 60 may further include an input port 2230 and an output port 2240 (ie, an example of the receiving unit 2110 and the sending unit 2130 in FIG. 21).
  • the processing unit 2210, the storage unit 2220, the input port 2230, and the output port 2240 can communicate with each other through internal connection paths to transfer control and/or data information.
  • the storage unit 2220 is used to store a computer program.
  • the processing unit 2210 can be used to call and run the calculation program from the storage unit 2220 to control the input port 2230 to receive information and the output port 2240 to send information to complete the above method. Intermediate node steps.
  • the storage unit 2220 may be integrated in the processing unit 2210, or may be provided separately from the processing unit 2210.
  • the input port 2230 is a receiver
  • the output port 2240 is a transmitter.
  • the receiver and transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.
  • FIG. 22 only shows a memory and a processor. In actual intermediate nodes, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.
  • An embodiment of the present application also provides a communication system, which includes the aforementioned network device, one or more terminal devices, and one or more intermediate nodes.
  • the present application also provides a computer-readable storage medium that stores instructions in the computer-readable storage medium.
  • the computer executes the network device in the method shown in FIGS. 6-16. The various steps performed.
  • the present application also provides a computer-readable storage medium that stores instructions in the computer-readable storage medium.
  • the computer executes the above-mentioned method shown in Figure 6-16. The various steps performed.
  • the present application also provides a computer-readable storage medium that stores instructions in the computer-readable storage medium.
  • the computer executes the intermediate node in the method shown in FIGS. 6-16. The various steps performed.
  • This application also provides a computer program product containing instructions.
  • the computer program product runs on a computer, the computer executes the steps performed by the network device in the method shown in FIGS. 6-16.
  • the present application also provides a computer program product containing instructions.
  • the computer program product runs on a computer, the computer executes the steps performed by the terminal device in the method shown in FIGS. 6-16.
  • This application also provides a computer program product containing instructions.
  • the computer program product runs on a computer, the computer executes the steps performed by the intermediate node in the method shown in Figs. 6-16.
  • This application also provides a chip including a processor.
  • the processor is used to read and run a computer program stored in the memory to execute the corresponding operations and/or processes performed by the terminal device in the method for data transmission and the method for configuring identifiers provided in this application.
  • the chip further includes a memory, the memory and the processor are connected to the memory through a circuit or a wire, and the processor is used to read and execute the computer program in the memory.
  • the chip further includes a communication interface, and the processor is connected to the communication interface.
  • the communication interface is used to receive data and/or information that needs to be processed, and the processor obtains the data and/or information from the communication interface, and processes the data and/or information.
  • the communication interface can be an input and output interface.
  • This application also provides a chip including a processor.
  • the processor is used to call and run a computer program stored in the memory to execute the corresponding operations and/or processes performed by the network device in the data transmission method and configuration identification method provided in this application.
  • the chip further includes a memory, the memory and the processor are connected to the memory through a circuit or a wire, and the processor is used to read and execute the computer program in the memory.
  • the chip further includes a communication interface, and the processor is connected to the communication interface.
  • the communication interface is used to receive data and/or information that needs to be processed, and the processor obtains the data and/or information from the communication interface, and processes the data and/or information.
  • the communication interface can be an input and output interface.
  • This application also provides a chip including a processor.
  • the processor is used to call and run a computer program stored in the memory to execute the corresponding operations and/or processes performed by the intermediate node in the method for data transmission and the method for configuring identification provided in this application.
  • the chip further includes a memory, the memory and the processor are connected to the memory through a circuit or a wire, and the processor is used to read and execute the computer program in the memory.
  • the chip further includes a communication interface, and the processor is connected to the communication interface.
  • the communication interface is used to receive data and/or information that needs to be processed, and the processor obtains the data and/or information from the communication interface, and processes the data and/or information.
  • the communication interface can be an input and output interface.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

Abstract

本申请提供了一种数据传输的方法和装置，该方法包括：网络设备经由中间节点向终端设备发送数据包，首先网络设备确定第一DCI和第一数据包，第一DCI经由终端设备的标识进行处理，第一数据包包括发送给终端设备的数据包，其次网络设备向中间节点发送第一DCI和第一数据包。本申请提供的数据传输的方法，终端设备可以仅仅监听中间节点发送的信号，降低了终端设备的复杂度，并且对于中间节点来说只需要正确解扰第一DCI获得第一数据包，无需对第一数据包进行解析，直接转发给终端设备即可，从而使得数据包能够快速转发，提高数据传输的性能。

Description

数据传输的方法和装置
本申请要求于2019年04月30日提交中国专利局、申请号为201910359404.2、申请名称为“数据传输的方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及一种数据传输的方法和装置。
背景技术
未来的第五代(5th generation，5G)系统主要支持三类业务：
增强型移动宽带通信(enhanced mobile broadband，eMBB)、大量机器类型通信(massive machine type communications，mMTC)、高可靠低时延通信(ultra-reliable and low latency communications，URLLC)。对于URLLC而言，其对时延和可靠性都有比较高的要求。例如，极端情况下URLLC业务要求时延是0.5ms，可靠性是10^-8。其中，URLLC最常见的应用场景之一是工业控制，工业控制的数据传输模型与传统的无线通信网络的数据传输据模型有很大不同。传统的无线通信网所传输的数据是无规律的，也就是说移动通信网络不知道传输的数据是什么，收到数据就传。但是，对于工业控制来说，每一个生产流程的动作指令都是可预知的。对于工业控制而言，无线网络所传输的信令是很有规律的。为此，引入了X节点(NodeX)，减少了控制中心和网络设备之间的数据传输量。NodeX预先获知生产流程，所以控制中心只需要触发网络设备启动生产流程，网络设备通知NodeX启动生产流程，NodeX收到网络设备的通知消息后，控制终端设备完成生产流程。采用这种方式，可以将NodeX部署得离终端设备比较近，这样，大量的数据传输都发生在NodeX和终端设备之间，而这两种节点之间的距离比较近，这样就可以节省无线资源，降低功率。
但是，上述做法要求终端设备只接收NodeX的数据，不直接从网络设备接收数据。事实上，网络设备仍然有一些数据需要直接传给终端设备，对这种数据，需要NodeX转发，通常这类数据都是比较紧急的数据，时延要求比较高。例如发生紧急情况时，控制中心通知网络设备停止操作。对这种转发型数据的处理，需要考虑如何发送，以保障通信正常进行。
发明内容
本申请提供一种数据传输的方法和装置，以期保障通信正常进行。
第一方面，提供了一种数据传输的方法，应用在网络设备经由中间节点向终端设备发送数据包的情况下，包括：网络设备确定第一DCI和第一数据包，第一DCI经由终端设备的标识进行处理，第一数据包包括发送给终端设备的数据包；网络设备向中间节点发送 第一DCI和第一数据包。
本申请实施例提供的数据传输的方法，网络设备在需要向终端设备发送数据包的时候，可以经由中间节点转发，进而终端设备可以只需要监听中间节点发送的信号，降低了终端设备的复杂度。网络设备向中间节点发送的第一DCI是经由终端设备的标识加扰的，中间节点只需要正确解扰第一DCI获得第一数据包即可，无需对第一数据包进行解扰，从而使得数据包能够快速转发，提高数据传输的性能。
在一种情况下，本申请中所涉及的第一DCI经由终端设备的标识进行处理可以包括第一数据包经由终端设备的标识进行加扰。
网络设备向中间节点发送的第一DCI和第一数据包之间可以存在对应关系，第一DCI用于中间节点获得第一数据包。
还应理解，上述的终端设备并不特指某一个终端设备，可以是中间节点连接的多个终端设备中的任意一个。中间节点连接某个终端设备也可以描述为某个终端设备与该中间节点相关联。
结合第一方面，在第一方面的某些实现方式中，在网络设备确定第一DCI和第一数据包之前，方法还包括：网络设备为终端设备分配终端设备的标识；网络设备向中间节点发送终端设备的标识。
结合第一方面，在第一方面的某些实现方式中，在网络设备确定第一DCI和第一数据包之前，方法还包括：
网络设备接收中间节点发送的终端设备的标识。
本申请实施例提供的数据传输的方法，加扰第一DCI的终端设备的标识可以是网络设备配置的，也可以是中间节点配置的。提供灵活的配置终端设备的标识的方案。
应理解，本申请中所涉及的终端设备的标识，可以指的是终端设备的RNTI，或者，终端设备的标识(identification，ID)等能够标识终端设备的信息。
结合第一方面，在第一方面的某些实现方式中，方法还包括：网络设备向目标网络设备发送切换请求，切换请求用于请求将中间节点以及终端设备接入目标网络设备，其中，切换请求中携带终端设备的标识；网络设备接收目标网络设备发送的切换响应，切换响应包括第一指示信息，第一指示信息用于指示终端设备的标识需要更新；网络设备向中间节点发送切换命令，切换命令用于通知中间节点接入目标网络设备，其中，切换命令包括第一指示信息。
本申请实施例提供的数据传输的方法，在中间节点和终端设备切换到目标网络设备时，如果该终端设备的标识与目标网络设备下的终端设备的标识发生冲突的话，目的网络设备可以指示即将切换过来的终端设备的标识更新为其他的标识，从而避免与本地的终端设备的标识发生冲突。
应理解，本申请中将用于请求将中间节点以及终端设备接入目标网络设备的消息称为切换请求只是一种举例，不对本申请的保护范围构成任何限定，例如，该消息还可以称为切换指示等。
结合第一方面，在第一方面的某些实现方式中，方法还包括：网络设备接收中间节点发送的连接失败指示信息，连接失败指示信息用于指示终端设备与中间节点之间连接失败。
本申请实施例提供的数据传输的方法，当中间节点确定连接的终端设备断开连接时。中间节点将终端设备连接失败的信息通知给网络设备，使得网络设备确定该终端设备无法继续接受数据。避免网络设备发送无法到达终端设备的数据。
应理解，本申请中将用于指示终端设备与中间节点之间连接失败的指示信息称为连接失败指示信息只是一种举例，不对本申请的保护范围构成任何限定，例如，该指示信息还可以称为失败指示，或未连接指示，或断开连接指示等。
第二方面，提供了一种数据传输的方法，包括：中间节点接收网络设备发送的第一DCI和第一数据包，第一DCI经由终端设备的标识进行处理，第一数据包包括发送给终端设备的数据包；中间节点基于终端设备的标识解扰第一DCI，获得第一数据包；中间节点向终端设备发送第三DCI和第一数据包，第三DCI经由终端设备的标识进行处理。
本申请实施例提供的数据传输的方法，网络设备在需要向终端设备发送数据包的时候，可以经由中间节点转发，进而终端设备可以只需要监听中间节点发送的信号，降低了终端设备的复杂度。网络设备向中间节点发送的第一DCI是经由终端设备的标识加扰的，中间节点只需要正确解扰第一DCI获得第一数据包即可，无需对第一数据包进行解扰，将第一数据包直接发送给终端设备，从而使得数据包能够快速转发，提高数据传输的性能。
在一种情况下，本申请中所涉及的第一DCI经由终端设备的标识进行处理可以理解为第一数据包经由终端设备的标识进行加扰。
网络设备向中间节点发送的第一DCI和第一数据包之间可以存在对应关系，第一DCI用于中间节点获得第一数据包。同理，中间节点向终端设备发送的第三DCI和第一数据包之间可以存在对应关系，即第三DCI用于终端设备获得第一数据包。
结合第二方面，在第二方面的某些实现方式中，在所述中间节点接收网络设备发送的第一DCI和第一数据包之前，所述方法还包括：所述中间节点为所述终端设备分配终端设备的标识；所述中间节点向所述网络设备发送所述终端设备的标识。
结合第一方面，在第一方面的某些实现方式中，在网络设备确定第一DCI和第一数据包之前，方法还包括：所述中间节点接收所述网络设备发送的所述终端设备的标识。
本申请实施例提供的数据传输的方法，加扰第一DCI的终端设备的标识可以是网络设备配置的，也可以是中间节点配置的。提供灵活的配置方案。
应理解，本申请中所涉及的终端设备的标识，可以指的是终端设备的RNTI，或者，终端设备的ID等能够标识终端设备的信息。
结合第二方面，在第二方面的某些实现方式中，所述方法还包括：所述中间节点接收所述网络设备发送的切换命令，切换命令用于通知所述中间节点接入所述目标网络设备，其中，切换命令包括第一指示信息，第一指示信息用于指示所述终端设备的标识需要更新。
本申请实施例提供的数据传输的方法，在中间节点和终端设备切换到目标网络设备时，如果终端设备的标识与目标网络设备下的终端设备的标识发生冲突的话，目的网络设备可以指示即将切换过来的终端设备的标识更新为其他的标识，从而避免与本地的终端设备的标识发生冲突。
结合第二方面，在第二方面的某些实现方式中，方法还包括：所述中间节点向所述网络设备发送连接失败指示信息，所述连接失败指示信息用于指示所述终端设备与所述中间节点之间连接失败。
本申请实施例提供的数据传输的方法，当中间节点确定连接的终端设备断开连接时，即该终端设备不再与中间节点保持连接。中间节点将终端设备连接失败的信息通知给网络设备，使得网络设备确定该终端设备无法继续接受数据。
应理解，本申请中将用于指示终端设备与中间节点之间连接失败的指示信息称为连接失败指示信息只是一种举例，不对本申请的保护范围构成任何限定，例如，该指示信息还可以称为失败指示，或未连接指示，或断开连接指示等。
第三方面，提供了一种数据传输的方法，包括：终端设备接收中间节点发送的第三DCI和所述第一数据包，所述第三DCI经由所述终端设备的标识进行处理，所述第一数据包包括发送给所述终端设备的数据包；所述终端设备基于所述终端设备的标识解扰所述第三DCI，获取所述第一数据包。
本申请实施例提供的数据传输的方法，终端设备可以从中间节点接收网络设备发送给终端设备的数据包，进而终端设备可以只需要监听中间节点发送的信号，降低了终端设备的复杂度。
结合第三方面，在第三方面的某些实现方式中，在所述终端设备接收中间节点发送的第三DCI和所述第一数据包之前，所述方法还包括：所述终端设备接收所述中间节点发送的所述终端设备的标识；或者，所述终端设备接收网络设备发送的所述终端设备的标识。
本申请实施例提供的数据传输的方法，加扰第一DCI的终端设备的标识可以是网络设备配置的，也可以是中间节点配置的。提供灵活的配置方案。
应理解，本申请中所涉及的终端设备的标识，可以指的是终端设备的RNTI，或者，终端设备的ID等能够标识终端设备的信息。
结合第三方面，在第三方面的某些实现方式中，所述方法还包括：所述终端设备接收所述中间节点发送的第一指示信息，所述第一指示信息用于指示所述终端设备的标识需要更新。
本申请实施例提供的数据传输的方法，终端设备的标识可以进行更新，从而避免多个终端设备的标识发生冲突。
第四方面，提供了一种数据传输的方法，应用在网络设备经由中间节点向N个终端设备发送数据包的情况下，包括：网络设备确定第二DCI和第二数据包，所述第二DCI经由中间节点的标识进行处理，所述第二数据包包括发送给N个终端设备的数据包，N为正整数；所述网络设备向所述中间节点发送所述第二DCI和所述第二数据包。
本申请实施例提供的数据传输的方法，网络设备在需要向N个终端设备发送数据包的时候，可以经由中间节点转发，进而N个终端设备可以只需要监听中间节点发送的信号，降低了终端设备的复杂度。
在一种情况下，本申请中所涉及的第二DCI经由中间节点的标识进行处理可以包括第二数据包经由中间节点的标识进行加扰。
网络设备向中间节点发送的第二DCI和第二数据包之间可以存在对应关系，第二DCI用于中间节点获得第二数据包。
结合第四方面，在第四方面的某些实现方式中，在所述网络设备确定所述第二DCI和第二数据包之前，所述方法还包括：所述网络设备为所述中间节点分配中间节点的标识。
本申请实施例提供的数据传输的方法，加扰第二DCI的中间节点的标识由网络设备为 中间节点配置。
结合第四方面，在第四方面的某些实现方式中，所述第二DCI中还包括用于指示所述N个终端设备的第二指示信息；或者，所述第二数据包的MAC头用于指示所述N个终端设备和所述第二数据包中分别发送至所述N个终端设备的数据包的大小。
本申请实施例提供的数据传输的方法，第二DCI或者第二数据包的MAC子头指示第二数据包中的数据发送至哪些终端设备，这样就可以把第二数据包中需要发送给N个终端设备的数据包顺利发给该N个终端设备
结合第四方面，在第四方面的某些实现方式中，所述方法还包括：所述网络设备为所述N个终端设备分别分配N个终端设备的标识；所述网络设备向所述中间节点发送所述N个终端设备的标识。
结合第四方面，在第四方面的某些实现方式中，所述方法还包括：所述网络设备接收所述中间节点发送的所述N个终端设备的标识。
本申请实施例提供的数据传输的方法，终端设备的标识可以是网络设备配置的，也可以是中间节点配置的。提供灵活的配置方案。
应理解，本申请中所涉及的终端设备的标识，可以指的是终端设备的RNTI，或者，终端设备的ID等能够标识终端设备的信息。
结合第四方面，在第四方面的某些实现方式中，方法还包括：所述网络设备向目标网络设备发送切换请求，所述切换请求用于请求将所述中间节点以及所述N个终端设备接入所述目标网络设备，所述切换请求中携带所述N个终端设备的标识；所述网络设备接收所述目标网络设备发送的切换响应，所述切换响应包括第三指示信息，所述第三指示信息用于指示所述N个终端设备中的终端设备的标识需要更新；所述网络设备向所述中间节点发送切换命令，切换命令用于通知所述中间节点接入所述目标网络设备，所述切换命令包括所述第三指示信息。
本申请实施例提供的数据传输的方法，在中间节点和终端设备切换到目标网络设备时，如果终端设备的标识与目标网络设备下的终端设备的标识发生冲突的话，目的网络设备可以指示即将切换过来的终端设备的标识更新为其他的标识，从而避免与本地的终端设备的标识发生冲突。
结合第四方面，在第四方面的某些实现方式中，方法还包括：所述网络设备接收所述中间节点发送的连接失败指示信息，所述连接失败指示信息用于指示所述N个终端设备中的终端设备与所述中间节点之间连接失败。
本申请实施例提供的数据传输的方法，当中间节点确定连接的终端设备断开连接时，即该终端设备不再与中间节点保持连接。中间节点将终端设备连接失败的信息通知给网络设备，使得网络设备确定该终端设备无法继续接受数据。
第五方面，提供了一种数据传输的方法，应用在网络设备经由中间节点向N个终端设备发送数据包的情况下，包括：中间节点接收网络设备发送的第二DCI和第二数据包，所述第二DCI经由中间节点的标识进行处理，所述第一数据包包括发送给N个终端设备的数据包，N为正整数；所述中间节点基于所述中间节点的标识解扰所述第二DCI；所述中间节点确定将所述第二数据包中的数据分别发送至所述N个终端设备；所述中间节点向终端设备发送第四DCI和第三数据包，所述第四DCI经由所述终端设备的标识进行处理， 所述第三数据包包括所述第二数据包中发送至所述终端设备的数据，其中，所述终端设备为所述N个终端设备中的任意一个终端设备。
本申请实施例提供的数据传输的方法，网络设备在需要向终端设备发送数据包的时候，可以经由中间节点转发，进而终端设备可以只需要监听中间节点发送的信号，降低了终端设备的复杂度。
应理解，本申请中所涉及的第二DCI经由中间节点的标识进行处理可以理解为第二数据包经由中间节点的标识进行加扰。
还应理解，网络设备向中间节点发送的第二DCI和第二数据包之间可以存在对应关系，即第二DCI用于中间节点获得第二数据包。同理，中间节点向终端设备发送的第四DCI和第三数据包之间可以存在对应关系，即第四DCI用于终端设备获得第三数据包。
结合第五方面，在第五方面的某些实现方式中，在所述中间节点接收网络设备发送的第二DCI和第二数据包之前，所述方法还包括：所述中间节点接收所述网络设备发送的所述中间节点的标识
本申请实施例提供的数据传输的方法，加扰第二DCI的中间节点的标识由网络设备为中间节点配置。
结合第五方面，在第五方面的某些实现方式中，所述第二DCI中还包括用于指示所述N个终端设备的第二指示信息；所述中间节点确定将所述第二数据包中的数据分别发送至所述N个终端设备包括：所述中间节点根据所述第二指示信息确定将所述第二数据包中的数据分别发送至所述N个终端设备。
结合第五方面，在第五方面的某些实现方式中，所述第二数据包的MAC子头用于指示所述N个终端设备和所述第二数据包中分别发送至所述N个终端设备的数据包的大小；所述中间节点确定将所述第二数据包中的数据分别发送至所述N个终端设备包括：所述中间节点的MAC层根据所述第二数据包的MAC头确定将所述第二数据包中的数据分别发送至所述N个终端设备。
本申请实施例提供的数据传输的方法，由于第二数据包中包括需要发送给N个终端设备的数据包，所以第二DCI或者第二数据包的MAC子头需要指示第二数据包中的数据发送至哪些终端设备。
结合第五方面，在第五方面的某些实现方式中，所述方法还包括：所述中间节点为所述N个终端设备分别分配N个终端设备的标识；所述中间节点向所述网络设备发送所述N个终端设备的标识；或者，所述中间节点接收所述网络设备发送的所述N个终端设备的标识。
本申请实施例提供的数据传输的方法，加扰第四DCI的终端设备的标识可以是网络设备配置的，也可以是中间节点配置的。提供灵活的配置方案。
应理解，本申请中所涉及的终端设备的标识，可以指的是终端设备的RNTI，或者，终端设备的ID等能够标识终端设备的信息。
结合第五方面，在第五方面的某些实现方式中，所述方法还包括：所述中间节点接收所述网络设备发送的切换命令，其中，所述切换命令包括第三指示信息，所述第三指示信息用于指示所述N个终端设备中的终端设备的标识需要更新。
本申请实施例提供的数据传输的方法，在中间节点和终端设备切换到目标网络设备 时，如果中间节点连接的N个终端设备中至少一个终端设备的标识与目标网络设备下的终端设备的标识发生冲突的话，目的网络设备可以指示即将切换过来的终端设备的标识更新为其他的标识，从而避免与本地的终端设备的标识发生冲突。
结合第五方面，在第五方面的某些实现方式中，方法还包括：所述方法还包括：所述中间节点向所述网络设备发送连接失败指示信息，所述连接失败指示信息用于指示所述N个终端设备中的终端设备与所述中间节点之间连接失败。
本申请实施例提供的数据传输的方法，当中间节点确定连接的终端设备断开连接时，即该终端设备不再与中间节点保持连接。中间节点将终端设备连接失败的信息通知给网络设备，使得网络设备确定该终端设备无法继续接受数据。
第六方面，提供了一种数据传输的方法，包括：终端设备接收中间节点发送的第四DCI和所述第三数据包，所述第四DCI经由所述终端设备的标识进行处理，所述第三数据包包括发送给所述终端设备的数据包；所述终端设备基于所述终端设备的标识解扰所述第四DCI，获取所述第三数据包。
本申请实施例提供的数据传输的方法，终端设备可以从中间节点接收网络设备发送给终端设备的数据包，进而终端设备可以只需要监听中间节点发送的信号，降低了终端设备的复杂度。
结合第六方面，在第六方面的某些实现方式中，在所述终端设备接收中间节点发送的第四DCI和所述第三数据包之前，所述方法还包括：所述终端设备接收所述中间节点发送的所述终端设备的标识；或者，所述终端设备接收网络设备发送的所述终端设备的标识。
本申请实施例提供的数据传输的方法，加扰第四DCI的终端设备的标识可以是网络设备配置的，也可以是中间节点配置的。提供灵活的配置方案。
应理解，本申请中所涉及的终端设备的标识，可以指的是终端设备的RNTI，或者，终端设备的ID等能够标识终端设备的信息。
结合第六方面，在第六方面的某些实现方式中，所述方法还包括：所述终端设备接收所述中间节点发送的第三指示信息，所述第三指示信息用于指示所述终端设备的标识需要更新。
本申请实施例提供的数据传输的方法，终端设备的标识可以进行更新，从而避免多个终端设备的标识发生冲突。
第七方面，一种配置标识的方法，包括：网络设备接收中间节点发送的第一关联请求消息，所述第一关联请求消息用于请求所述网络设备为终端设备配置标识；所述网络设备向所述中间节点发送关联响应消息，所述关联响应消息中包括所述终端设备的标识。
本申请实施例提供的配置标识的方法，网络设备可以在接收到中间节点的第一关联请求消息之后，为终端设备配置标识，其中第一关联请求消息中包括终端设备在侧行链路的标识(sidelink user equipment identify，SL UE ID)。
应理解，本申请中将用于请求所述网络设备为终端设备配置标识的消息称为第一关联请求消息只是一种举例，不对本申请的保护范围构成任何限定，例如，该消息还可以称为配置请求消息，或请求消息，或配置消息等。
结合第七方面，在第七方面的某些实现方式中，所述方法还包括：所述网络设备向所述中间节点发送所述第四指示信息，所述第四指示信息用于指示中间节点作为至少一个终 端设备的调度组头，所述调度组头用于为所述至少一个终端设备调度侧行链路SL资源。
本申请实施例提供的配置标识的方法，网络设备可以指示中间节点为调度终端设备的调度组头。
结合第七方面，在第七方面的某些实现方式中，在所述网络设备确定第四指示信息之前，所述方法还包括：所述网络设备接收所述中间节点发送的请求消息，所述请求消息用于请求所述网络设备将所述中间节点设置为所述调度组头，或者，所述请求消息用于通知所述网络设备所述中间节点具有所述调度组头的能力；或者，所述网络设备接收核心网设备的第五指示信息，所述第五指示信息用于指示所述中间节点为所述调度组头。
本申请实施例提供的配置标识的方法，网络设备指示中间节点为调度组头的先决条件可以是多种，为网络设备指示中间节点为调度组头提供灵活的确定方案。
结合第七方面，在第七方面的某些实现方式中，所述终端设备的标识占有的比特位数小于24。
本申请实施例提供的配置标识的方法，终端设备的标识长度小于终端设备在侧行链路的标识的长度，从而实现了中间节点在侧行链路调度终端设备时减少了空口开销的目的。
第八方面，一种配置标识的方法，包括：中间节点向网络设备发送第一关联请求消息，所述第一关联请求消息用于请求所述网络设备为终端设备配置标识；所述中间节点接收所述网络设备发送的关联响应消息，所述关联响应消息中包括所述终端设备的标识。
本申请实施例提供的配置标识的方法，网络设备可以在接收到中间节点的第一关联请求消息之后，为终端设备配置标识。
结合第八方面，在第八方面的某些实现方式中，所述方法还包括：在所述中间节点向网络设备发送第一关联请求消息之前，所述方法还包括：所述中间节点接收所述终端设备发送的第二关联请求消息，所述第二关联请求消息用于请求关联到所述中间节点。
本申请实施例提供的配置标识的方法，中间节点从终端设备处接收第二关联请求消息，获知某个或某些终端设备请求关联到中间节点，其中第二关联请求消息中包括SL UE ID。
结合第八方面，在第八方面的某些实现方式中，所述中间节点接收所述网络设备发送的第四指示信息，所述第四指示信息用于指示中间节点作为至少一个终端设备的调度组头，所述调度组头用于为所述至少一个终端设备调度侧行链路SL资源。
本申请实施例提供的配置标识的方法，网络设备可以指示中间节点为调度终端设备的调度组头。
结合第八方面，在第八方面的某些实现方式中，所述中间节点广播发现消息，所述发现消息用于通知终端设备，所述中间节点为所述调度组头。
本申请实施例提供的配置标识的方法，中间节点通过广播的方式通知终端设备自身为调度组头。
结合第八方面，在第八方面的某些实现方式中，所述中间节点向所述网络设备发送请求消息，所述请求消息用于请求所述网络设备将所述中间节点设置为所述调度组头，或者，所述请求消息用于通知所述网络设备所述中间节点具有所述调度组头的能力。
结合第八方面，在第八方面的某些实现方式中，所述中间节点向核心网设备发送第六指示信息，所述第六指示信息用于指示所述中间节点为高层组头。
本申请实施例提供的配置标识的方法，中间节点为调度组头的先决条件可以是多种，为网络设备确定中间节点为调度组头提供灵活的确定方案。
结合第八方面，在第八方面的某些实现方式中，所述中间节点向所述终端设备发送所述终端设备的标识。
结合第八方面，在第八方面的某些实现方式中，所述终端设备的标识占有的比特位数小于24。
本申请实施例提供的配置标识的方法，终端设备的标识长度小于终端设备在侧行链路的标识的长度，从而实现了中间节点在侧行链路调度终端设备时减少了空口开销的目的。
第九方面，一种配置标识的方法，包括：终端设备向中间节点发送第二关联请求消息，所述第二关联请求消息用于请求关联到所述中间节点。
本申请实施例提供的配置标识的方法，终端设备向中间节点发送第二关联请求消息，请求关联到中间节点，其中第二关联请求消息中包括SL UE ID。
结合第九方面，在第九方面的某些实现方式中，所述终端设备获取所述中间节点广播的发现消息，确定所述中间节点为调度组头。
本申请实施例提供的配置标识的方法，终端设备可以获知中间节点为调度终端设备的调度组头。
结合第九方面，在第九方面的某些实现方式中，所述终端设备接收所述中间节点发送的所述终端设备的标识。
结合第九方面，在第九方面的某些实现方式中，所述终端设备的标识占有的比特位数小于24。
本申请实施例提供的配置标识的方法，终端设备的标识长度小于终端设备在侧行链路的标识的长度，从而实现了中间节点在侧行链路调度终端设备时减少了空口开销的目的。
第十方面，一种配置标识的方法，包括：网络设备确定第四指示信息，所述第四指示信息用于指示中间节点作为终端设备的调度组头，所述调度组头用于为所述终端设备调度侧行链路SL资源，其中，所述第四指示信息中包括标识集合，所述标识集合中的一个标识为一个所述终端设备的标识；所述网络设备向所述中间节点发送所述第四指示信息。
本申请实施例提供的配置标识的方法，网络设备可以指示中间节点为调度组头，并提前分配标识集合。
结合第十方面，在第十方面的某些实现方式中，在所述网络设备确定第四指示信息之前，所述方法还包括：所述网络设备接收所述中间节点发送的请求消息，所述请求消息用于请求所述网络设备将所述中间节点设置为所述调度组头，或者，所述请求消息用于通知所述网络设备所述中间节点具有所述调度组头的能力；或者，所述网络设备接收核心网设备的第五指示信息，所述第五指示信息用于指示所述中间节点为所述调度组头。
本申请实施例提供的配置标识的方法，网络设备指示中间节点为调度组头的先决条件可以是多种，为网络设备指示中间节点为调度组头提供灵活的确定方案。
结合第十方面，在第十方面的某些实现方式中，所述终端设备的标识占有的比特位数小于24。
本申请实施例提供的配置标识的方法，终端设备的标识长度小于终端设备在侧行链路的标识的长度，从而实现了中间节点在侧行链路调度终端设备时减少了空口开销的目的。
第十一方面，一种配置标识的方法，包括：中间节点接收网络设备发送的第四指示信息，所述第四指示信息用于指示中间节点作为终端设备的调度组头，所述调度组头用于为所述终端设备调度侧行链路SL资源，其中，所述第四指示信息中包括标识集合，所述标识集合中的一个标识为一个所述终端设备的标识；所述中间节点根据所述第四指示信息确定为所述终端设备调度侧行链路SL资源。
结合第十一方面，在第十一方面的某些实现方式中，所述方法还包括：所述中间节点接收所述终端设备发送的所述第二关联请求消息，所述第二关联请求消息用于请求关联到所述中间节点。
本申请实施例提供的配置标识的方法，中间节点从终端设备处接收第二关联请求消息，获知某个或某些终端设备请求关联到中间节点，其中第二关联请求消息中包括SL UE ID。
结合第十一方面，在第十一方面的某些实现方式中，所述中间节点广播发现消息，所述发现消息用于通知终端设备，所述中间节点为所述调度组头。
本申请实施例提供的配置标识的方法，中间节点通过广播的方式通知终端设备自身为调度组头。
结合第十一方面，在第十一方面的某些实现方式中，所述中间节点向所述网络设备发送请求消息，所述请求消息用于请求所述网络设备将所述中间节点设置为所述调度组头，或者，所述请求消息用于通知所述网络设备所述中间节点具有所述调度组头的能力。
结合第十一方面，在第十一方面的某些实现方式中，所述中间节点向核心网设备发送第六指示信息，所述第六指示信息用于指示所述中间节点为高层组头。
本申请实施例提供的配置标识的方法，中间节点为调度组头的先决条件可以是多种，为网络设备确定中间节点为调度组头提供灵活的确定方案。
结合第十一方面，在第十一方面的某些实现方式中，所述中间节点向所述终端设备发送所述终端设备的标识。
结合第十一方面，在第十一方面的某些实现方式中，所述终端设备的标识占有的比特位数小于24。
本申请实施例提供的配置标识的方法，终端设备的标识长度小于终端设备在侧行链路的标识的长度，从而实现了中间节点在侧行链路调度终端设备时减少了空口开销的目的。
第十二方面，一种配置标识的方法，包括：终端设备向中间节点发送第二关联请求消息，所述第二关联请求消息用于请求关联到所述中间节点。
本申请实施例提供的配置标识的方法，终端设备向中间节点发送第二关联请求消息，请求关联到中间节点。
结合第十二方面，在第十二方面的某些实现方式中，所述终端设备获取所述中间节点广播的发现消息，确定所述中间节点为调度组头。
本申请实施例提供的配置标识的方法，终端设备可以获知中间节点为调度终端设备的调度组头。
结合第十二方面，在第十二方面的某些实现方式中，所述终端设备接收所述中间节点发送的所述终端设备的标识。
结合第十二方面，在第十二方面的某些实现方式中，所述终端设备的标识占有的比特 位数小于24。
本申请实施例提供的配置标识的方法，终端设备的标识长度小于终端设备在侧行链路的标识的长度，从而实现了中间节点在侧行链路调度终端设备时减少了空口开销的目的。
第十三方面，提供了一种数据传输的装置，应用在网络设备经由中间节点向终端设备发送数据包的情况下，包括：处理单元，用于确定第一DCI和第一数据包，第一DCI经由终端设备的标识进行处理，第一数据包包括发送给终端设备的数据包；发送单元，用于向中间节点发送第一DCI和第一数据包。
结合第十三方面，在第十三方面的某些实现方式中，在处理单元确定第一DCI和第一数据包之前，处理单元，还用于为终端设备分配终端设备的标识；发送单元，还用于向中间节点发送终端设备的标识。
结合第十三方面，在第十三方面的某些实现方式中，在处理单元确定第一DCI和第一数据包之前，装置还包括：接收单元，用于接收中间节点发送的终端设备的标识。
结合第十三方面，在第十三方面的某些实现方式中，发送单元还用于向目标网络设备发送切换请求，切换请求用于请求将中间节点以及终端设备接入目标网络设备，其中，切换请求中携带终端设备的标识；接收单元，还用于接收目标网络设备发送的切换响应，切换响应包括第一指示信息，第一指示信息用于指示终端设备的标识需要更新；发送单元，还用于向中间节点发送切换命令，切换命令用于通知中间节点接入目标网络设备，其中，切换命令包括第一指示信息。
结合第十三方面，在第十三方面的某些实现方式中，接收单元，还用于接收中间节点发送的连接失败指示信息，连接失败指示信息用于指示终端设备与中间节点之间连接失败。
第十三方面以及第十三方面的任意可能的实现方式中提供的数据传输的装置，可以用来执行第一方面以及第一方面的任意可能的实现方式中的网络设备的操作。具体地，数据传输的装置包括用于执行上述第一方面以及第一方面的任意可能的实现方式中所描述的步骤或功能相对应的部件(means)可以是第一方面中的网络设备或网络设备内部的芯片或功能模块。步骤或功能可以通过软件实现，或硬件实现，或者通过硬件和软件结合来实现。
第十四方面，提供了一种数据传输的装置，包括：接收单元，用于接收网络设备发送的第一DCI和第一数据包，第一DCI经由终端设备的标识进行处理，第一数据包包括发送给终端设备的数据包；处理单元，用于基于终端设备的标识解扰第一DCI，获得第一数据包；发送单元，用于向终端设备发送第三DCI和第一数据包，第三DCI经由终端设备的标识进行处理。
结合第十四方面，在第十四方面的某些实现方式中，在所述接收单元接收网络设备发送的第一DCI和第一数据包之前，所述处理单元，还用于为所述终端设备分配终端设备的标识；所述发送单元向所述网络设备发送所述终端设备的标识。
结合第十四方面，在第十四方面的某些实现方式中，在网络设备确定第一DCI和第一数据包之前，所述接收单元还用于接收所述网络设备发送的所述终端设备的标识。
结合第十四方面，在第十四方面的某些实现方式中，所述接收单元，还用于接收所述网络设备发送的切换命令，切换命令用于通知接入所述目标网络设备，其中，切换命令包 括第一指示信息，第一指示信息用于指示所述终端设备的标识需要更新。
结合第十四方面，在第十四方面的某些实现方式中，发送单元，还用于向所述网络设备发送连接失败指示信息，所述连接失败指示信息用于指示所述终端设备与所述中间节点之间连接失败。
第十四方面以及第十四方面的任意可能的实现方式中提供的数据传输的装置，可以用来执行第二方面以及第二方面的任意可能的实现方式中的中间节点的操作。具体地，数据传输的装置包括用于执行上述第二方面以及第二方面的任意可能的实现方式中所描述的步骤或功能相对应的部件(means)可以是第二方面中的中间节点或中间节点内部的芯片或功能模块。步骤或功能可以通过软件实现，或硬件实现，或者通过硬件和软件结合来实现。
第十五方面，提供了一种数据传输的装置，包括：接收单元，用于接收中间节点发送的第三DCI和所述第一数据包，所述第三DCI经由终端设备的标识进行处理，所述第一数据包包括发送给所述终端设备的数据包；处理单元，用于基于所述终端设备的标识解扰所述第三DCI，获取所述第一数据包。
结合第十五方面，在第十五方面的某些实现方式中，在所述接收单元接收中间节点发送的第三DCI和所述第一数据包之前，接收单元还用于接收所述中间节点发送的所述终端设备的标识；或者，接收单元还用于接收网络设备发送的所述终端设备的标识。
结合第十五方面，在第十五方面的某些实现方式中，接收单元，用于接收所述中间节点发送的第一指示信息，所述第一指示信息用于指示所述终端设备的标识需要更新。
第十五方面以及第十五方面的任意可能的实现方式中提供的数据传输的装置，可以用来执行第三方面以及第三方面的任意可能的实现方式中的终端设备的操作。具体地，数据传输的装置包括用于执行上述第三方面以及第三方面的任意可能的实现方式中所描述的步骤或功能相对应的部件(means)可以是第三方面中的终端设备或终端设备内部的芯片或功能模块。步骤或功能可以通过软件实现，或硬件实现，或者通过硬件和软件结合来实现。
第十六方面，提供了一种数据传输的装置，应用在网络设备经由中间节点向N个终端设备发送数据包的情况下，包括：处理单元，用于确定第二DCI和第二数据包，所述第二DCI经由中间节点的标识进行处理，所述第二数据包包括发送给N个终端设备的数据包，N为正整数；发送单元，用于向所述中间节点发送所述第二DCI和所述第二数据包。
结合第十六方面，在第十六方面的某些实现方式中，在所述处理单元确定所述第二DCI和第二数据包之前，所述处理单元还用于为所述中间节点分配中间节点的标识。
结合第十六方面，在第十六方面的某些实现方式中，所述第二DCI中还包括用于指示所述N个终端设备的第二指示信息；或者，所述第二数据包的MAC头用于指示所述N个终端设备和所述第二数据包中分别发送至所述N个终端设备的数据包的大小。
结合第十六方面，在第十六方面的某些实现方式中，所述处理单元还用于为所述N个终端设备分别分配N个终端设备的标识；发送单元，用于向所述中间节点发送所述N个终端设备的标识。
结合第十六方面，在第十六方面的某些实现方式中，所述装置还包括：接收单元，用于接收所述中间节点发送的所述N个终端设备的标识。
结合第十六方面，在第十六方面的某些实现方式中，发送单元，用于向目标网络设备发送切换请求，所述切换请求用于请求将所述中间节点以及所述N个终端设备接入所述目标网络设备，所述切换请求中携带所述N个终端设备的标识；接收单元，用于接收所述目标网络设备发送的切换响应，所述切换响应包括第三指示信息，所述第三指示信息用于指示所述N个终端设备中的终端设备的标识需要更新；发送单元，用于向所述中间节点发送切换命令，切换命令用于通知所述中间节点接入所述目标网络设备，所述切换命令包括所述第三指示信息。
结合第十六方面，在第十六方面的某些实现方式中，接收单元，用于接收所述中间节点发送的连接失败指示信息，所述连接失败指示信息用于指示所述N个终端设备中的终端设备与所述中间节点之间连接失败。
第十六方面以及第十六方面的任意可能的实现方式中提供的数据传输的装置，可以用来执行第四方面以及第四方面的任意可能的实现方式中的网络设备的操作。具体地，数据传输的装置包括用于执行上述第四方面以及第四方面的任意可能的实现方式中所描述的步骤或功能相对应的部件(means)可以是第四方面中的网络设备或网络设备内部的芯片或功能模块。步骤或功能可以通过软件实现，或硬件实现，或者通过硬件和软件结合来实现。
第十七方面，提供了一种数据传输的装置，应用在网络设备经由中间节点向N个终端设备发送数据包的情况下，包括：接收单元，用于接收网络设备发送的第二DCI和第二数据包，所述第二DCI经由中间节点的标识进行处理，所述第一数据包包括发送给N个终端设备的数据包，N为正整数；处理单元，用于基于所述中间节点的标识解扰所述第二DCI；处理单元，用于确定将所述第二数据包中的数据分别发送至所述N个终端设备；发送单元，用于向终端设备发送第四DCI和第三数据包，所述第四DCI经由所述终端设备的标识进行处理，所述第三数据包包括所述第二数据包中发送至所述终端设备的数据，其中，所述终端设备为所述N个终端设备中的任意一个终端设备。
结合第十七方面，在第十七方面的某些实现方式中，在所述接收单元接收网络设备发送的第二DCI和第二数据包之前，所述接收单元还用于接收所述网络设备发送的所述中间节点的标识
结合第十七方面，在第十七方面的某些实现方式中，所述第二DCI中还包括用于指示所述N个终端设备的第二指示信息；所述处理单元确定将所述第二数据包中的数据分别发送至所述N个终端设备包括：所述发送单元根据所述第二指示信息确定将所述第二数据包中的数据分别发送至所述N个终端设备。
结合第十七方面，在第十七方面的某些实现方式中，所述第二数据包的MAC子头用于指示所述N个终端设备和所述第二数据包中分别发送至所述N个终端设备的数据包的大小；所述处理单元确定将所述第二数据包中的数据分别发送至所述N个终端设备包括：所述发送单元根据所述第二数据包的MAC头确定将所述第二数据包中的数据分别发送至所述N个终端设备。
结合第十七方面，在第十七方面的某些实现方式中，所述装置还包括：所述处理单元为所述N个终端设备分别分配N个终端设备的标识；所述发送单元向所述网络设备发送所述N个终端设备的标识；或者，所述接收单元接收所述网络设备发送的所述N个终端 设备的标识。
结合第十七方面，在第十七方面的某些实现方式中，所述装置还包括：所述接收单元接收所述网络设备发送的切换命令，其中，所述切换命令包括第三指示信息，所述第三指示信息用于指示所述N个终端设备中的终端设备的标识需要更新。
结合第十七方面，在第十七方面的某些实现方式中，装置还包括：所述装置还包括：所述发送单元向所述网络设备发送连接失败指示信息，所述连接失败指示信息用于指示所述N个终端设备中的终端设备与所述中间节点之间连接失败。
第十七方面以及第十七方面的任意可能的实现方式中提供的数据传输的装置，可以用来执行第五方面以及第五方面的任意可能的实现方式中的中间节点的操作。具体地，数据传输的装置包括用于执行上述第五方面以及第五方面的任意可能的实现方式中所描述的步骤或功能相对应的部件(means)可以是第五方面中的中间节点或中间节点内部的芯片或功能模块。步骤或功能可以通过软件实现，或硬件实现，或者通过硬件和软件结合来实现。
第十八方面，提供了一种数据传输的装置，包括：接收单元，用于接收中间节点发送的第四DCI和所述第三数据包，所述第四DCI经由所述终端设备的标识进行处理，所述第三数据包包括发送给所述终端设备的数据包；处理单元，用于基于所述终端设备的标识解扰所述第四DCI，获取所述第三数据包。
结合第十八方面，在第十八方面的某些实现方式中，在所述接收单元接收中间节点发送的第四DCI和所述第三数据包之前，所述接收单元还用于接收所述中间节点发送的所述终端设备的标识；或者，所述接收单元接收网络设备发送的所述终端设备的标识。
结合第十八方面，在第十八方面的某些实现方式中，所述接收单元接收所述中间节点发送的第三指示信息，所述第三指示信息用于指示所述终端设备的标识需要更新。
第十八方面以及第十八方面的任意可能的实现方式中提供的数据传输的装置，可以用来执行第六方面以及第六方面的任意可能的实现方式中的终端设备的操作。具体地，数据传输的装置包括用于执行上述第六方面以及第六方面的任意可能的实现方式中所描述的步骤或功能相对应的部件(means)可以是第六方面中的终端设备或终端设备内部的芯片或功能模块。步骤或功能可以通过软件实现，或硬件实现，或者通过硬件和软件结合来实现。
第十九方面，一种配置标识的装置，包括：接收单元，用于接收中间节点发送的第一关联请求消息，所述第一关联请求消息用于请求所述网络设备为终端设备配置标识；发送单元，用于向所述中间节点发送关联响应消息，所述关联响应消息中包括所述终端设备的标识。
结合第十九方面，在第十九方面的某些实现方式中，发送单元向所述中间节点发送所述第四指示信息，所述第四指示信息用于指示中间节点作为至少一个终端设备的调度组头，所述调度组头用于为所述至少一个终端设备调度侧行链路SL资源。
结合第十九方面，在第十九方面的某些实现方式中，在处理单元确定第四指示信息之前，所述接收单元，还用于接收所述中间节点发送的请求消息，所述请求消息用于请求所述处理单元将所述中间节点设置为所述调度组头，或者，所述请求消息用于通知所述网络设备所述中间节点具有所述调度组头的能力；或者，所述接收单元接收核心网设备的第五 指示信息，所述第五指示信息用于指示所述中间节点为所述调度组头。
结合第十九方面，在第十九方面的某些实现方式中，所述终端设备的标识占有的比特位数小于24。
第十九方面以及第十九方面的任意可能的实现方式中提供的数据传输的装置，可以用来执行第七方面以及第七方面的任意可能的实现方式中的网络设备的操作。具体地，数据传输的装置包括用于执行上述第七方面以及第七方面的任意可能的实现方式中所描述的步骤或功能相对应的部件(means)可以是第七方面中的网络设备或网络设备内部的芯片或功能模块。步骤或功能可以通过软件实现，或硬件实现，或者通过硬件和软件结合来实现。
第二十方面，一种配置标识的装置，包括：发送单元，用于向网络设备发送第一关联请求消息，所述第一关联请求消息用于请求所述网络设备为终端设备配置标识；接收单元，用于接收所述网络设备发送的关联响应消息，所述关联响应消息中包括所述终端设备的标识。
结合第二十方面，在第二十方面的某些实现方式中，所述发送单元向网络设备发送第一关联请求消息之前，所述接收单元，还用于接收所述终端设备发送的所述第一关联请求消息，所述第一关联请求消息用于请求关联到所述中间节点。
结合第二十方面，在第二十方面的某些实现方式中，所述接收单元接收所述网络设备发送的第四指示信息，所述第四指示信息用于指示中间节点作为至少一个终端设备的调度组头，所述调度组头用于为所述至少一个终端设备调度侧行链路SL资源。
结合第二十方面，在第二十方面的某些实现方式中，所述发送单元广播发现消息，所述发现消息用于通知终端设备，所述中间节点为所述调度组头。
结合第二十方面，在第二十方面的某些实现方式中，所述发送单元向所述网络设备发送请求消息，所述请求消息用于请求所述网络设备将所述中间节点设置为所述调度组头，或者，所述请求消息用于通知所述网络设备所述中间节点具有所述调度组头的能力。
结合第二十方面，在第二十方面的某些实现方式中，所述发送单元向核心网设备发送第六指示信息，所述第六指示信息用于指示所述中间节点为高层组头。
结合第二十方面，在第二十方面的某些实现方式中，所述发送单元向所述终端设备发送所述终端设备的标识。
结合第二十方面，在第二十方面的某些实现方式中，所述终端设备的标识占有的比特位数小于24。
第二十方面以及第二十方面的任意可能的实现方式中提供的数据传输的装置，可以用来执行第八方面以及第八方面的任意可能的实现方式中的中间节点的操作。具体地，数据传输的装置包括用于执行上述第八方面以及第八方面的任意可能的实现方式中所描述的步骤或功能相对应的部件(means)可以是第八方面中的中间节点或中间节点内部的芯片或功能模块。步骤或功能可以通过软件实现，或硬件实现，或者通过硬件和软件结合来实现。
第二十一方面，一种配置标识的装置，包括：发送单元，用于向中间节点发送第二关联请求消息，所述第二关联请求消息用于请求关联到所述中间节点。
结合第二十一方面，在第二十一方面的某些实现方式中，装置还包括：接收单元，用 于获取所述中间节点广播的发现消息，确定所述中间节点为调度组头。
结合第二十一方面，在第二十一方面的某些实现方式中，所述接收单元接收所述中间节点发送的所述终端设备的标识。
结合第二十一方面，在第二十一方面的某些实现方式中，所述终端设备的标识占有的比特位数小于24。
第二十一方面以及第二十一方面的任意可能的实现方式中提供的数据传输的装置，可以用来执行第九方面以及第九方面的任意可能的实现方式中的终端设备的操作。具体地，数据传输的装置包括用于执行上述第九方面以及第九方面的任意可能的实现方式中所描述的步骤或功能相对应的部件(means)可以是第九方面中的终端设备或终端设备内部的芯片或功能模块。步骤或功能可以通过软件实现，或硬件实现，或者通过硬件和软件结合来实现。
第二十二方面，一种配置标识的装置，包括：处理单元，用于确定第四指示信息，所述第四指示信息用于指示中间节点作为终端设备的调度组头，所述调度组头用于为所述终端设备调度侧行链路SL资源，其中，所述第四指示信息中包括标识集合，所述标识集合中的一个标识为一个所述终端设备的标识；发送单元，用于向所述中间节点发送所述第四指示信息。
结合第二十二方面，在第二十二方面的某些实现方式中，在所述处理单元确定第四指示信息之前，所述装置还包括：接收单元，用于接收所述中间节点发送的请求消息，所述请求消息用于请求所述网络设备将所述中间节点设置为所述调度组头，或者，所述请求消息用于通知所述网络设备所述中间节点具有所述调度组头的能力；或者，所述接收单元接收核心网设备的第五指示信息，所述第五指示信息用于指示所述中间节点为所述调度组头。
结合第二十二方面，在第二十二方面的某些实现方式中，所述终端设备的标识占有的比特位数小于24。
第二十二方面以及第二十二方面的任意可能的实现方式中提供的数据传输的装置，可以用来执行第十方面以及第十方面的任意可能的实现方式中的网络设备的操作。具体地，数据传输的装置包括用于执行上述第十方面以及第十方面的任意可能的实现方式中所描述的步骤或功能相对应的部件(means)可以是第十方面中的网络设备或网络设备内部的芯片或功能模块。步骤或功能可以通过软件实现，或硬件实现，或者通过硬件和软件结合来实现。
第二十三方面，一种配置标识的装置，包括：接收单元，用于接收网络设备发送的第四指示信息，所述第四指示信息用于指示中间节点作为终端设备的调度组头，所述调度组头用于为所述终端设备调度侧行链路SL资源，其中，所述第四指示信息中包括标识集合，所述标识集合中的一个标识为一个所述终端设备的标识；处理单元，用于根据所述第四指示信息确定为所述终端设备调度侧行链路SL资源。
结合第二十三方面，在第二十三方面的某些实现方式中，所述接收单元接收所述终端设备发送的所述第二关联请求消息，所述第二关联请求消息用于请求关联到所述中间节点。
结合第二十三方面，在第二十三方面的某些实现方式中，装置还包括：发送单元，用 于广播发现消息，所述发现消息用于通知终端设备，所述中间节点为所述调度组头。
结合第二十三方面，在第二十三方面的某些实现方式中，所述发送单元向所述网络设备发送请求消息，所述请求消息用于请求所述网络设备将所述中间节点设置为所述调度组头，或者，所述请求消息用于通知所述网络设备所述中间节点具有所述调度组头的能力。
结合第二十三方面，在第二十三方面的某些实现方式中，所述发送单元向核心网设备发送第六指示信息，所述第六指示信息用于指示所述中间节点为高层组头。
结合第二十三方面，在第二十三方面的某些实现方式中，所述发送单元向所述终端设备发送所述终端设备的标识。
结合第二十三方面，在第二十三方面的某些实现方式中，所述终端设备的标识占有的比特位数小于24。
第二十三方面以及第二十三方面的任意可能的实现方式中提供的数据传输的装置，可以用来执行第十一方面以及第十一方面的任意可能的实现方式中的中间节点的操作。具体地，数据传输的装置包括用于执行上述第十一方面以及第十一方面的任意可能的实现方式中所描述的步骤或功能相对应的部件(means)可以是第十一方面中的中间节点或中间节点内部的芯片或功能模块。步骤或功能可以通过软件实现，或硬件实现，或者通过硬件和软件结合来实现。
第二十四方面，一种配置标识的装置，包括：发送单元，用于向中间节点发送第二关联请求消息，所述第二关联请求消息用于请求关联到所述中间节点。
结合第二十四方面，在第二十四方面的某些实现方式中，装置还包括：接收单元，用获取所述中间节点广播的发现消息，确定所述中间节点为调度组头。
结合第二十四方面，在第二十四方面的某些实现方式中，所述终端设备接收所述中间节点发送的所述终端设备的标识。
结合第二十四方面，在第二十四方面的某些实现方式中，所述终端设备的标识占有的比特位数小于24。
第二十四方面以及第二十四方面的任意可能的实现方式中提供的数据传输的装置，可以用来执行第十二方面以及第十二方面的任意可能的实现方式中的终端设备的操作。具体地，数据传输的装置包括用于执行上述第十二方面以及第十二方面的任意可能的实现方式中所描述的步骤或功能相对应的部件(means)可以是第十二方面中的终端设备或终端设备内部的芯片或功能模块。步骤或功能可以通过软件实现，或硬件实现，或者通过硬件和软件结合来实现。
第二十五方面，提供了一种通信设备，包括，处理器，收发器，存储器，该存储器用于存储计算机程序，该收发器，用于执行第一至第十二方面中任一种可能实现方式中的数据传输的方法中的收发步骤，该处理器用于从存储器中调用并运行该计算机程序，使得该通信设备执行第一至第十二方面中任一种可能实现方式中的数据传输的方法。
可选地，处理器为一个或多个，存储器为一个或多个。
可选地，存储器可以与处理器集成在一起，或者存储器与处理器分离设置。
可选的，收发器包括，发射机(发射器)和接收机(接收器)。
一个可能的设计中，提供了一种通信设备，包括收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用 并运行该计算机程序，使得该通信设备执行第一方面、第四方面、第七方面和第十方面以及第一方面、第四方面、第七方面和第十方面的任意可能的实现方式中的方法。
另一个可能的设计中，提供了一种通信设备，包括收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该通信设备执行第二方面、第五方面、第八方面和第十一方面以及第二方面、第五方面、第八方面和第十一方面的任意可能的实现方式中的方法。
又一个可能的设计中，提供了一种通信设备，包括收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该通信设备执行第三方面、第六方面、第九方面和第十二方面以及第三方面、第六方面、第九方面和第十二方面的任意可能的实现方式中的方法。
第二十六方面，提供了一种系统，系统包括第十三方面至第二十四方面提供的数据传输的装置。
第二十七方面，提供了一种计算机程序产品，计算机程序产品包括：计算机程序(也可以称为代码，或指令)，当计算机程序被运行时，使得计算机执行上述第一至第十二方面中任一种可能实现方式中的方法。
第二十八方面，提供了一种计算机可读介质，计算机可读介质存储有计算机程序(也可以称为代码，或指令)当其在计算机上运行时，使得计算机执行上述第一至第十二方面中任一种可能实现方式中的方法。
第二十九方面，提供了一种芯片系统，包括存储器和处理器，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得安装有该芯片系统的通信设备执行上述第一至第十二方面中任一种可能实现方式中的方法。
附图说明
图1是能够适用本申请实施例数据传输的方法的系统100的示意图。
图2是一种工业控制流程的示意图。
图3是另一种工业控制流程的示意图。
图4是另一种工业控制流程的示意图。
图5是另一种工业控制流程的示意图。
图6是本申请实施例中提供的一种数据传输的方法的示意性流程图。
图7是本申请实施例提供的一种协议栈示意图。
图8是本申请实施例中提供的另一种数据传输的方法的示意性流程图。
图9是本申请实施例提供的一种第二数据包结构示意图。
图10中(a)和(b)是本申请实施例提供的另一种第二数据包结构示意图。
图11是本申请实施例提供的一种中间节点MAC层处理第二数据包的示意图。
图12是本申请实施例提供中间节点向终端设备发送的数据包的示意图。
图13是本申请实施例提供的一种切换网络设备的示意性流程图。
图14是本申请实施例提供的一种终端设备连接失败的示意性流程图。
图15是本申请实施例提供的一种配置标识的方法示意图。
图16是本申请实施例提供的另一种配置标识的方法示意图。
图17是本申请提出的数据传输的装置10的示意图。
图18是适用于本申请实施例的终端设备20的结构示意图。
图19是本申请提出的数据传输的装置30的示意图。
图20是适用于本申请实施例的网络设备40的结构示意图。
图21是本申请提出的数据传输的装置50的示意图。
图22是适用于本申请实施例的中间节点60的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：第五代(5th generation，5G)系统、新无线(new radio，NR)。
本申请实施例中的终端设备可以指用户设备、接入终端、用户单元、用户站、移动站、移动台、中继站、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。终端设备还可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等。具体地，本申请实施例提供的数据传输的方法可以应用在工业控制场景中，本申请中所涉及的终端设备可以是工业控制中执行工业流程的设备，例如，操作臂。本申请实施例对此并不限定。
本申请实施例中的中间节点可以是用于与终端设备通信的任意一种具有无线收发功能的设备。该设备包括但不限于上述的终端设备、中继节点、局部控制节点、控制中心等包括应用层和接入层的功能的设备。
本申请实施例中的网络设备可以是用于与终端设备通信的任意一种具有无线收发功能的设备。该设备包括但不限于：家庭基站(例如，Home evolved NodeB，或Home Node B，HNB)、基带单元(BaseBand Unit，BBU)，无线保真(Wireless Fidelity，WIFI)系统中的接入点(Access Point，AP)、无线中继节点、无线回传节点、传输点(transmission point，TP)或者发送接收点(transmission and reception point，TRP)等，还可以为5G，如，NR，系统中的gNB，或，传输点(TRP或TP)，5G系统中的接入网设备的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)，或，分布式单元(distributed unit，DU)等。
在一些部署中，gNB可以包括集中式单元(centralized unit，CU)和DU。gNB还可以包括有源天线单元(active antenna unit，简称AAU)。CU实现gNB的部分功能，DU实现gNB的部分功能。比如，CU实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能。DU实现无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理(physical，PHY)层的功能。AAU实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令，也可以认为是由DU发送的， 或者，由DU+AAU发送的。可以理解的是，网络设备可以为包括CU节点、DU节点、AAU节点中一项或多项的设备。此外，可以将CU划分为接入网(radio access network，RAN)中的网络设备，本申请对此不做限定。
在本申请实施例中，终端设备或网络设备或中间节点包括硬件层、运行在硬件层之上的操作系统层，以及运行在操作系统层上的应用层。该硬件层包括中央处理器(central processing unit，CPU)、内存管理单元(memory management unit，MMU)和内存(也称为主存)等硬件。该操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统，例如，Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、即时通信软件等应用。并且，本申请实施例并未对本申请实施例提供的方法的执行主体的具体结构特别限定，只要能够通过运行记录有本申请实施例的提供的方法的代码的程序，以根据本申请实施例提供的方法进行通信即可，例如，本申请实施例提供的方法的执行主体可以是终端设备或网络设备，或者，是终端设备或网络设备中能够调用程序并执行程序的功能模块。
另外，本申请的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。本申请中使用的术语“制品”涵盖可从任何计算机可读器件、载体或介质访问的计算机程序。例如，计算机可读介质可以包括，但不限于：磁存储器件(例如，硬盘、软盘或磁带等)，光盘(例如，压缩盘(compact disc，CD)、数字通用盘(digital versatile disc，DVD)等)，智能卡和闪存器件(例如，可擦写可编程只读存储器(erasable programmable read-only memory，EPROM)、卡、棒或钥匙驱动器等)。另外，本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读存储介质”可包括但不限于，无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
图1是能够适用本申请实施例数据传输的方法的系统100的示意图。包括终端设备101、网络设备102以及中间节点103。
如图1所示，网络设备102可包括1个天线或多个天线。例如，天线104、106、108、110、112和114。另外，网络设备102可附加地包括：发射机链和接收机链。
本领域普通技术人员可以理解，发射机链和接收机链均可包括与信号发送和接收相关的多个部件(例如，处理器、调制器、复用器、解调器、解复用器或天线等)。
网络设备102可以与中间节点103通信。然而，可以理解，网络设备102可以与类似于中间节点103的任意数目的中间节点通信。
如图1所示，中间节点103通过天线112和114与网络设备102通信。其中，天线112和114通过前向链路(也称为下行链路)118向中间节点103发送信息，并通过反向链路(也称为上行链路)1720从中间节点103接收信息。
此外，终端设备101通过天线104和106与网络设备102通信。其中，天线104和106通过前向链路124向终端设备101发送信息，并通过反向链路126从终端设备101接收信息。
例如，在频分双工(frequency division duplex，FDD)系统中。例如，前向链路118可与反向链路1720使用不同的频带，前向链路124可与反向链路126使用不同的频带。
再例如，在时分双工(time division duplex，TDD)系统和全双工(full duplex)系统中，前向链路118和反向链路1720可使用共同频带，前向链路124和反向链路126可使 用共同频带。
被设计用于通信的每个天线(或者，由多个天线组成的天线组)和/或区域称为网络设备102的扇区。
例如，可将天线组设计为与网络设备102覆盖区域的扇区中的终端设备通信。网络设备可以通过单个天线或多天线发射分集向其对应的扇区内所有的终端设备发送信号。在网络设备102通过前向链路118和124分别与终端设备116和122进行通信的过程中，网络设备102的发射天线也可利用波束成形来改善前向链路118和124的信噪比。
此外，与网络设备通过单个天线或多天线发射分集向它所有的终端设备发送信号的方式相比，在网络设备102利用波束成形向相关覆盖区域中随机分散的终端设备116和122发送信号时，相邻小区中的移动设备会受到较少的干扰。
在给定时间，网络设备102、终端设备101和中间节点103可以是无线通信发送装置和/或无线通信接收装置。当发送数据时，无线通信发送装置可对数据进行编码以用于传输。具体地，无线通信发送装置可获取(例如生成、从其它通信装置接收、或在存储器中保存等)要通过信道发送至无线通信接收装置的一定数目的数据比特。这种数据比特可包含在数据的传输块(或多个传输块)中，传输块可被分段以产生多个码块。
同理，系统100中包括的中间节点103，与上述的网络设备102类似，可包括1个天线或多个天线。中间节点103可以与终端设备101通信。具体地，通信过程与上述的网络设备102与终端设备之间的通信过程类似，这里不再赘述。
此外，该通信系统100可以是PLMN网络、D2D网络、M2M网络、IoT网络或者其他网络，图1只是举例的简化示意图，图1所示的通信系统中还可以包括其他网络设备和/或其他的终端设备，为了简便图1中未予以画出。例如，图1所示的通信系统可以是一个网络设备与多个终端设备进行通信，即单个网络设备可以向单个或多个终端设备传输数据或控制信令；或者，图1所示的通信系统可以是多个网络设备与一个终端设备进行通信，即多个网络设备也可以同时为单个终端设备传输数据或控制信令。
应理解，图1仅仅是一种简单的示意图，用于说明本申请实施例中提供的数据传输的方法适用的场景，并不能对本申请构成任何的限定。为了便于对本申请实施例中提供的数据传输的方法的理解，下面结合图2-图5简单介绍本申请中涉及的工业控制网络中的数据传输模型。
图2是一种工业控制流程的示意图。对于工业控制来说，每一个生产流程的动作指令都是可预知的。如图2所示，控制中心(control center，CN)通知操作臂加工零件时，需要十个动作，控制中心会分别通知操作臂完成这十个动作，这十个动作完成后，加工一个零部件的工作结束；控制中心开始通知操作臂加工下一个零部件，于是控制中心又发送十条消息，通知操作臂完成十个动作，加工另一个零部件。由上述可知，对于工业控制而言，无线网络所传输的信令是很有规律的。为了减少了控制中心和基站之间的数据传输量，引入了NodeX，NodeX实现通知终端设备完成上述的十个动作。如图3所示。图3是另一种工业控制流程的示意图。
图3中，NodeX预先知道加工一个零件需要完成十个动作。所以控制中心只需要通知基站：请加工零件；基站接收到该指令之后，基站通知NodeX：请加工零件；NodeX收到后，将该指令分解成十个动作，生成十条消息发给操作臂。采用这种方式，可以将NodeX 部署得离操作臂比较近，这样大量的数据传输都发生在NodeX和操作臂之间，而这NodeX和操作臂之间的距离比较近，这样就可以节省无线资源，降低数据传输的功率。
但是，图3所示的工业控制流程要求操作臂只接收来自NodeX的数据，不直接从基站接收数据。事实上，基站仍然有一些数据需要直接传给操作臂。对于这种数据，需要经由NodeX转发，如图4中的虚线流程所表示的数据传输。图4是另一种工业控制流程的示意图。通常这类数据都是比较紧急的数据，时延要求比较高，比如，发生紧急情况时，控制中心通知操作臂停止操作。对这种转发型数据的处理，为了保证满足时延的要求主要通过图5所示的方式。图5是另一种工业控制流程的示意图。图5所示的工业控制流程网络设备需要知道终端设备的RNTI，网络设备和终端设备之间传输数据采用的频点，与NodeX和终端设备之间传输数据采用频点不同，网络设备可以直接向终端设备发送数据，无需经由NodeX转发，达到减少时延的目的。这种情况下，终端设备需要同时通过两个不同的频点分别实现与NodeX之间的通信和与网络设备之间的通信，增加了终端设备的复杂度，提高了终端设备的价格。
为了解决现有的工业控制流程中网络设备与终端设备之间数据传输存在的缺陷。本申请提出一种数据传输的方法。
下面结合图6-图14详细介绍本申请实施例中提供的数据传输的方法
图6是本申请实施例中提供的一种数据传输的方法的示意性流程图。下面从交互的角度描述图6所示的数据传输的方法。
应理解，图6提供的数据传输的方法可以应用在上述的工业控制网络中，该工业控制网络中的网络设备与终端设备之间需要进行数据传输，该数据经由中间节点发送给终端设备。
图6中的网络设备有数据需要发送给终端设备时，会通过中间节点转发给终端设备。那么终端设备只需要接收来自中间节点的数据包，无需既要接收来自中间节点的数据包也要接收来自网络设备的数据包。对于终端设备来说，降低了终端设备的复杂度。
该数据传输方法包括如下步骤：
S610，网络设备确定第一下行控制信息(downlink control information，DCI)和第一数据包。
具体地，在网络设备有数据要发送给终端设备的时候，网络设备将需要发送给终端设备的数据打包成第一数据包，并且该第一数据包可以基于第一DCI获得。其中，第一DCI经由终端设备的标识进行处理，或者，可以说第一DCI经由终端设备的标识进行加扰。
示例性地，上述的网络设备将需要发送给终端设备的数据打包成第一数据包包括以下几种可能的情况：
1)网络设备需要发送多个数据包给终端设备，该多个数据包打包成第一数据包，经由中间节点转发给终端设备。
例如，网络设备需要将数据包#1和数据包#2发送给终端设备，则网络设备可以将数据包#1和数据包#2打包为上述的第一数据包。
2)网络设备需要发送一个数据包给终端设备，该数据包的尺寸超过网络设备与中间节点之间的空口传输能力，则网络设备分段传输该数据包，上述的第一数据包中包括该数据包中的一部分数据。
例如，网络设备需要将数据包#1发送给终端设备，数据包#1的尺寸为200比特，但是网络设备与中间节点之间的空口传输能力为一次传输100比特，则网络设备可以将据包#1分段传输给终端设备，将数据包#1中的100比特打包为第一数据包、将数据包#1中的另外100比特打包为另一个第一数据包。
应理解，上述的第一DCI用于中间节点获取上述的第一数据包，即第一DCI与第一数据包相对应。均需要发送给中间节点，执行S620，网络设备向中间节点发送第一DCI和第一数据包。
具体地，第一DCI通过物理下行控制信道(physical downlink control channel，PDCCH)发送至中间节点；第一数据包通过物理下行共享信道(physical downlink shared channel，PDSCH)发送至中间节点。
中间节点接收到第一DCI和第一数据包之后，能够解扰该第一DCI，从而获取到第一数据包。其中，中间节点能够解扰该第一DCI的前提是中间节点已知上述的终端设备的标识，具体地，图6所示的实施例中，中间节点获知上述的终端设备的标识可以通过如下两种可能的方案：
方案一：中间节点从网络设备处获知上述的终端设备的标识，则图6所示的方法流程还包括S611，网络设备为终端设备分配终端设备的标识。
具体地，终端设备可以通过随机接入(random access，RA)或其它流程，从网络设备处直接获得自己的标识，本申请中对于终端设备如何获得自身的标识并不限制。
进一步地，网络设备在为终端设备分配了终端设备的标识之后，为了使得中间节点获知中间节点连接的终端设备的标识，图6所示的方法流程还包括S612，网络设备向中间节点发送终端设备的标识。其中，网络设备可以通过预配置信息，知道将终端设备的标识通知到该中间节点；或者，网络设备也可以通过终端设备上报的测量报告，获知该终端设备最靠近该中间节点，就将终端设备的标识通知给该中间节点。
执行上述的S611和S612之后，中间节点能够获知终端设备的标识，那么在中间节点接收到第一DCI和第一数据包之后，中间节点可以使用终端设备的标识解扰第一DCI，获得第一数据包。
应理解，图6只是以中间节点连接有一个终端设备为例进行说明的，实际应用时一个中间节点可以连接有多个终端设备，网络设备可以通过该中间节点向该中间节点所连接的多个终端设备分别发送数据。那么上述的S611中网络设备可以分别为多个终端设备分配终端设备的标识。对于中间节点来说，采用图6所示的方案时，通常情况下有几个终端设备通过中间节点接入，中间节点就需要使用几个终端设备的标识从网络设备接收下行数据。中间节点与网络设备之间的无线接口，各个终端设备的标识对应的搜索空间可以相同，也可以不同，本申请对此并不限制。
方案二：中间节点为终端设备分配终端设备的标识，并将终端设备的标识通知给网络设备，则图6所示的方法流程还包括S613，中间节点为终端设备分配终端设备的标识。
进一步地，在中间节点为终端设备分配了终端设备的标识之后，为了使得网络设备获知终端设备的标识，图6所示的方法流程还包括S614，中间节点向网络设备发送终端设备的标识。
示例性地，如果中间节点连接的多个终端设备所执行的动作总是相同，可以为这多个 终端设备分配相同的终端设备的标识，这种情况下，网络设备可以经由中间节点同时给多个终端设备发送数据。
进一步地，在中间节点接收到上述的第一DCI和第一数据包之后，中间节点解扰第一DCI获得第一数据包，即执行S630。
具体地，在S612中网络设备可以将多个终端设备的标识发给中间节点，或者，在S613中中间节点可以为多个终端设备分配终端设备的标识。此时中间节点接收到第一DCI和第一数据包之后，可以用已知的多个终端设备的标识分别解扰第一DCI，直至正确解扰第一DCI。
例如，中间节点连接有2个终端设备(终端设备#1和终端设备#2)网络设备需要分别向终端设备#1发送第一DCI#1和第一数据包#1和向终端设备#2发送第一DCI#2和第一数据包#2。上述的S611中网络设备可以分别为终端设备#1和终端设备#2分配终端设备的标识#1和终端设备的标识#2，在S612中网络设备可以将终端设备的标识#1和终端设备的标识#2通知给中间节点。当中间节点接收到第一DCI#1和第一数据包#1时，分别基于终端设备的标识#1和终端设备的标识#2解扰第一DCI#1，其中，基于终端设备的标识#1能够成功解扰该第一DCI#1，获得第一数据包#1。
应理解，在图6所示的实施例中，中间节点并不对第一数据包进行解析。只需要获得该第一数据包即可，具体地，中间节点接收到第一DCI和第一数据包之后，读取PDCCH上的第一DCI，解扰该第一DCI，当使用该终端设备的标识解扰该第一DCI成功时，知道第一DCI对应的第一数据包是发给该终端设备的标识对应的终端设备，直接将第一数据包发给该终端设备，执行S640，中间节点向终端设备发送第三DCI和第一数据包，第三DCI经由该终端设备的标识进行加扰，具体地，本申请实施例中，中间节点向终端设备发送的下行控制信息可以直接称为DCI，或者，还可以称为侧行链路下行控制信息(sidelink downlink control information，SL DCI或SCI)等。本申请实施例中对于中间节点向终端设备发送的控制信息的称谓并不限制，只是限制该控制信息被终端设备的标识进行加扰。本申请中的控制信息可以由物理控制信道承载，包括上下行资源分配等功能。在本申请实施例中，正确解扰控制信息之后，能够正确接收数据包。本申请中数据包也可以称之为传输块(transmission block，TB)。终端设备接收到第三DCI和第一数据包之后，基于自身的标识解扰第三DCI，获取到第一数据包，即图6所示的实施例还包括S641，终端设备获取第一数据包。
示例性地，上述的S610-S640过程中，中间节点的内的协议栈如图7所示，图7是本申请实施例提供的一种协议栈示意图。从图7中可以看出中间节点接收到网络设备发送的TB之后，无需解析该TB，只需要解扰第一DCI正确之后，获得该TB，再将该TB发送给终端设备即可。中间节点内不涉及MAC层、RLC层的处理，只在PHY层进行转发，从而能够快速转发该TB。图7中所示的网络设备根据网络设备与中间节点之间的无线接口情况，选择合适的调制编码方式(modulation coding scheme，MCS)、码率等参数，用终端设备的标识寻址生成第一DCI，向中间节点发送TB。中间节点用终端设备的标识做盲检，收到数据后，只要循环冗余码校验(cyclic redundancy check，CRC)检验正确，无需处理，就根据中间节点与终端设备之间的无线接口情况，选择合适的MCS、码率等参数，用终端设备的标识寻址生成第三DCI，向终端设备发送TB。
图6所示的实施例中由于数据包在中间节点内只需要进行物理层的处理，中间节点读取出数据包，不需要对数据包进行MAC层、RLC层等处理，所以中间节点处理速度快。另一方面，终端设备只需要监听中间节点发送的数据包，不需要同时监听网络设备和中间节点发送的数据包，降低了终端设备的难度。
图6所示的方法流程中，网络设备向中间节点发送的第一DCI是经由终端设备的标识进行处理的。本申请中还提供另一种实现网络设备经由中间节点向终端设备发送数据包的方法，网络设备向中间节点发送的DCI是经由中间节点的标识进行处理的，下面结合图8详细介绍该方案。
图8是本申请实施例中提供的另一种数据传输的方法的示意性流程图。下面从交互的角度描述图8所示的数据传输的方法。
应理解，图8提供的数据传输的方法可以应用在上述的工业控制网络中，该工业控制网络中的网络设备与N个终端设备之间需要进行数据传输，该N个终端设备与一个中间节点相连接。
图8中的网络设备有数据需要发送给终端设备时，会通过中间节点转发给终端设备。那么终端设备只需要接收来自中间节点的数据包，无需既要接收来自中间节点的数据包也要接收来自网络设备的数据包。对于终端设备来说，降低了终端设备的复杂度。
该数据传输方法包括如下步骤：
S810，网络设备确定第二DCI和第二数据包。
具体地，在网络设备有数据要发送给终端设备的时候，网络设备将需要发送给N个终端设备的数据打包成第二数据包，并且该第一数据包可以基于第二DCI获得。其中，第二DCI经由中间节点的标识进行处理，或者，可以说第二DCI经由中间节点的标识进行加扰。
示例性地，上述的网络设备将需要发送给N个终端设备的数据打包成第二数据包，包括以下几种可能的情况：
1)网络设备需要发送多个数据包给一个终端设备，该多个数据包打包成第二数据包，经由中间节点转发给终端设备。
例如，网络设备需要将数据包#1和数据包#2发送给终端设备，则网络设备可以将据包#1和数据包#2打包为上述的第二数据包。
2)网络设备需要发送多个数据包给多个终端设备，该多个数据包打包成第二数据包，经由中间节点转发给终端设备。
例如，网络设备需要将数据包#1和数据包#2分别发送给终端设备#1和终端设备#2，则网络设备可以将据包#1和数据包#2打包为上述的第二数据包。
3)网络设备需要发送一个数据包给一个终端设备，该数据包的尺寸超过网络设备与中间节点之间的空口传输能力，则网络设备分段传输该数据包，上述的第二数据包中包括该数据包中的一部分数据。
例如，网络设备需要将数据包#1发送给终端设备，数据包#1的尺寸为200比特，但是网络设备与中间节点之间的空口传输能力为一次传输100比特，则网络设备可以将据包#1分段传输给终端设备，将数据包#1中的100比特打包为第二数据包、将数据包#1中的另外100比特打包为另一个第二数据包。
4)网络设备需要将数据包#1和数据包#2分别发送给终端设备#1和终端设备#2，数 据包#1和数据包#2之和的尺寸超过网络设备与中间节点之间的空口传输能力，则网络设备分段传输该数据包#1和数据包#2，上述的第二数据包中包括数据包#1中的一部分数据和数据包#2中的一部分数据。
例如，网络设备需要将数据包#1和数据包#2分别发送给终端设备#1和终端设备#2，数据包#1的尺寸为100比特，数据包#2的尺寸为100比特，但是网络设备与中间节点之间的空口传输能力为一次传输100比特，则网络设备可以将数据包#1分段传输给终端设备#1，数据包#2分段传输给终端设备#2，例如将数据包#1中的50比特和数据包#2中的50比特打包为第二数据包、将数据包#1中的另外50比特和数据包#2中的另外50比特打包为另一个第二数据包。
5)网络设备需要将数据包#1和数据包#2分别发送给终端设备#1和终端设备#2，数据包#1和数据包#2之和的尺寸超过网络设备与中间节点之间的空口传输能力，则网络设备分别传输该数据包#1和数据包#2，上述的第二数据包中包括数据包#1。
例如，网络设备需要将数据包#1和数据包#2分别发送给终端设备#1和终端设备#2，数据包#1的尺寸为100比特，数据包#2的尺寸为100比特，但是网络设备与中间节点之间的空口传输能力为一次传输100比特，则网络设备可以将数据包#1打包为第二数据包、将数据包#2打包为另一个第二数据包。
应理解，上述的第二DCI用于中间节点获取上述的第二数据包，即第二DCI与第二数据包相对应。均需要发送给中间节点，执行S820，网络设备向中间节点发送第二DCI和第二数据包。具体地，第二DCI通过PDCCH发送至中间节点；第二数据包通过PDSCH发送至中间节点。
中间节点接收到第二DCI和第二数据包之后，能够解扰该第二DCI，从而获取到第二数据包。其中，中间节点能够解扰该第二DCI的前提是中间节点已知上述中间节点的标识，具体地，图8所示的实施例中，中间节点从网络设备处获知上述的中间节点的标识，则图8所示的方法流程还包括S811，网络设备为中间节点分配中间节点的标识。
执行上述的S811之后，中间节点能够获知中间节点的标识，那么在中间节点接收到第二DCI和第二数据包之后，中间节点可以使用中间节点的标识解扰第二DCI，获得第二数据包，确定第二数据包中的数据需要发送至N个终端设备，即执行S830，中间节点解扰第二DCI，划分第二数据包，获得N个第三数据包。详细的划分过程如下所述：
应理解，图8只是以网络设备连接有一个中间节点为例进行说明的，实际应用时一个网络设备可以连接有多个中间节点，网络设备可以通过该多个中间节点分别向该中间节点所连接的多个终端设备发送数据。那么上述的S811中网络设备可以分别为多个中间节点分配中间节点的标识。对于中间节点来说，在接收到第二数据包之后还需要将第二数据包中包括的N个终端设备的数据分别发送给N个终端设备，即中间节点需要确定第二数据包中的哪些数据发送给那个终端设备。
示例性地，图8所示的实施例中，中间节点确定第二数据包中的数据分别发送至哪N个终端设备可以通过以下两种方式确定：
方式一：第二DCI中还包括用于指示所述N个终端设备的第二指示信息。相应地，中间节点确定将第二数据包中的数据分别发送至N个终端设备。
如图9所示，图9是本申请实施例提供的一种第二数据包结构示意图。从图9中可以 看出，网络设备发送的第二数据包中包括网络设备需要向终端设备#1和终端设备#2发送的数据，且第二DCI中包括指示终端设备#1和终端设备#2的第二指示信息。进一步地，第二DCI还包括指示第二数据包中分别发送至N个终端设备的数据包的大小和时频位置的指示信息，或者，第二数据包中分别发送至N个终端设备的数据包的大小和时频位置为预设的无需通过第二DCI中的指示信息额外指示。中间节点接收到第二DCI和第二数据包之后，可以基于第二DCI的指示将第二数据包分为N个数据包分别发送给N个终端设备。
在方式一下，网络设备可以将需要发送给多个终端设备的数据包打包成第二数据包发给中间节点，中间节点经过简单处理直接转发给多个终端设备。在中间节点内第二数据包无需经过中间节点的MAC层和RLC层的处理。
方式二：第二数据包的MAC子头用于指示N个终端设备和第二数据包中分别发送至N个终端设备的数据包的大小。
网络设备确定第二数据包的时候，通过第二数据包的MAC子头指示第二数据包中的数据分别发给哪些终端设备的，MAC子头还指示发送给各个终端设备的数据包的大小。
如图10所示，图10是本申请实施例提供的另一种第二数据包结构示意图。从图10中可以看出，网络设备向终端设备发送的第二数据包中包括网络设备需要向终端设备#1和终端设备#2的数据，且第二数据包的MAC子头指示第二数据包中的分别发送至终端设备#1和终端设备#2的数据包的大小。
中间节点接收到第二DCI和第二数据包之后，如果第二数据包的CRC校验无误，则将第二数据包交给中间节点的MAC层处理。MAC层根据逻辑信道标识(logical channel identify，LCH ID)，识别第二数据包中的数据包分别发送给哪些终端设备的。
图10(a)中，对应有终端设备#1的两个逻辑信道(如图10(a)所示的RLC A和RLC B分别对应的两个逻辑信道)，对应有终端设备#2的一个逻辑信道(如图10(a)所示的RLC对应的逻辑信道)。示例性地，作为一种具体的实现方式，网络设备侧的协议栈中，有两层MAC层，上面一层MAC层(如图10(a)所示的MAC for UE1和MAC for UE2)是每个终端设备对应的数据包的MAC层，终端设备#1和终端设备#2各自对应一个MAC层，下面一层MAC层(如图10(a)所示的MAC for NodeX)是网络设备和中间节点之间的接口的数据包的MAC层；
图10(b)中，对应有终端设备#1的两个逻辑信道(如图10(b)所示的RLC A和RLC B分别对应的两个逻辑信道)，对应有终端设备#2的一个逻辑信道(如图10(b)所示的RLC对应的逻辑信道)。示例性地，作为另一种具体的实现方式，网络设备侧的协议栈中，右边的MAC层(如图10(b)所示的MAC for UE1和MAC for UE2)是每个终端设备对应的数据包的MAC层，终端设备#1和终端设备#2各自对应一个MAC层，左边的MAC层(如图10(b)所示的MAC for NodeX)是网络设备和中间节点之间的接口的数据包的MAC层，也就是说网络设备和中间节点之间的接口的数据包的MAC层和每个终端设备对应的数据包的MAC层可以位于同一层MAC层中不同位置上的MAC层。
发给两个终端设备的下行数据在网络设备中被打包成一个第二数据包，用中间节点的标识加扰第二DCI后发出，中间节点中的物理层确定第二数据包的CRC校验无误后，交给中间节点的MAC层处理，中间节点的MAC层识别第二数据包的包头中的终端设备的 标识之后，将第二数据包分成两个TB，该两个TB分别发给两个终端设备。中间节点的MAC层只处理外层的MAC子头，不处理里层的MAC子头。如图11所示，中间节点的MAC层只处理虚线框部分，不处理实线框部分。图11是本申请实施例提供的一种中间节点MAC层处理第二数据包的示意图。如图11所示中间节点的MAC层处理虚线框所示的部分之后，能够确定第二数据包中分别发送至终端设备#1(如图11所示的UE1)和终端设备#2(如图11所示的UE2)的数据大小，直接将第二数据包拆分为两个数据包分别发送给终端设备#1和终端设备#2。具体地，中间节点向终端设备#1和终端设备#2发送的数据包时，需要同时发送分别经由终端设备#1的标识和终端设备#2的标识加扰的第四DCI。如图12所示，图12是本申请实施例提供中间节点向终端设备发送的数据包的示意图。
应理解，图8所示的实施例中，中间节点接收到网络设备发送的第二DCI和第二数据包之后，确定将第二数据包中的数据分别发送至N个终端设备的前提是中间节点已知该N个终端设备的标识。与图6中所示的方案一和方案二类似，图8所示的方法实施例中，中间节点获知上述的N个终端设备的标识可以通过如下两种可能的方案：
方案一：中间节点从网络设备处获知上述的N个终端设备的标识，则图8所示的方法流程还包括S812，网络设备为N个终端设备分配终端设备的标识。
具体地，N个终端设备中的每个终端设备可以通过RA或其它流程，从网络设备处直接获得自己的标识。
进一步地，网络设备在为终端设备分配了N个终端设备的标识之后，为了使得中间节点获知中间节点连接的终端设备的标识，图8所示的方法流程还包括S813，网络设备向中间节点发送N个终端设备的标识。其中，网络设备可以通过预配置信息，将N个终端设备的标识通知到中间节点；或者，网络设备也可以通过N个终端设备上报的测量报告，获知该N个终端设备最靠近该中间节点，就将N个终端设备的标识通知给该中间节点。
执行上述的S812和S813之后，中间节点能够获知N个终端设备的标识，那么在中间节点接收到第二DCI和第二数据包，并获知第二数据包中的数据分别发送至N个终端设备之后，中间节点可以分别使用N个终端设备的标识加扰N个第四DCI。
一种可能的实现方式，如果多个终端设备所执行的动作总是相同，可以为这多个终端设备分配相同的终端设备的标识，这种情况下，网络设备可以经由中间节点同时给多个终端设备发送数据。
另一种可能的实现方式，如果网络设备下有两个中间节点，这两个中间节点分别连接的终端设备的标识可以相同。
方案二：中间节点为N个终端设备分配终端设备的标识，并将N个终端设备的标识通知给网络设备，则图8所示的方法流程还包括S814，中间节点为N个终端设备分配终端设备的标识。
进一步地，在中间节点为终端设备分配了终端设备的标识之后，为了使得网络设备获知终端设备的标识，图8所示的方法流程还包括S815，中间节点向网络设备发送N个终端设备的标识。
执行S830之后，中间节点确定第二数据包中的数据分别发送至N个终端设备，即执行S840。则中间节点将第二数据包中的数据分解为N个数据包，该N个数据包分别发送至N个终端设备。具体地，该N个数据包对应N个DCI，以中间节点向N个终端设备中 的任意一个终端设备发送数据包为例，中间节点向终端设备发送第四DCI和第三数据包，该第三数据包中包括的数据为第二数据包中包括的需要发送至该终端设备的数据，第四DCI用于该终端设备获取该第三数据包，其中，第四DCI经由该终端设备的标识加扰。终端设备接收到第四DCI和第三数据包之后，基于自身的标识解扰第四DCI，获取到第一数据包，即图8所示的实施例还包括S841，终端设备获取第三数据包。
图6和图8所示的方法流程中，还可能出现小区的切换，即中间节点和中间节点相连接的一个或者多个终端设备可能会从上述的网络设备切换连接到另一个网络设备(目标网络设备)，下面结合图13详细介绍如何实现网络设备切换的。图13是本申请实施例提供的一种切换网络设备的示意性流程图。
该切换网络设备的方法包括如下步骤：
S1310，源网络设备向目的网络设备发送切换请求。
具体地，源网络设备决定将自身连接的中间节点及中间节点连接的多个终端设备切换到目的网络设备时，该源网络设备向目的网络设备发送切换请求。其中，该切换请求包含中间节点下连接的所有终端设备的标识。
例如，针对上述图6所示的方法流程中，源网络设备为图6中所示的网络设备。网络设备向目标网络设备发送切换请求，切换请求用于请求将中间节点以及终端设备接入目标网络设备，其中，切换请求中携带终端设备的标识；
针对上述图8所示的方法流程中，源网络设备为图8中所示的网络设备。网络设备向目标网络设备发送切换请求，切换请求用于请求将中间节点以及N个终端设备接入目标网络设备，切换请求中携带N个终端设备的标识。
S1320，目的网络设备向源网络设备发送切换响应。
目的网络设备收到切换请求后，获知即将切换过来的某个或某些终端设备的标识与当前目的网络设备下面连接的终端设备的标识之间有冲突，在切换响应中携带指示信息，通知源网络设备并指示源网络设备下需要切换到目的网络设备的某个或某些终端设备的标识需要更新。
例如，针对上述图6所示的方法流程中，源网络设备为图6中所示的网络设备。目标网络设备向网络设备发送的切换响应中携带第一指示信息，第一指示信息用于指示终端设备的标识需要更新；进一步地，第一指示信息中携带有该终端设备更新后终端设备的标识，例如，第一指示信息指示将终端设备的RNTI#1(YYYY)更新为RNTI#2(ZZZZ)；
针对上述图8所示的方法流程中，源网络设备为图8中所示的网络设备。目标网络设备向网络设备发送切换响应，切换响应包括第三指示信息，第三指示信息用于指示N个终端设备中的至少一个终端设备的标识需要更新，具体地，第三指示信息指示将终端设备#1的RNTI#1更新为RNTI#2、终端设备#2的RNTI#3更新为RNTI#4。
S1330，源网络设备向中间节点发送切换命令。
具体地，切换命令中包括指示某个或某些终端设备的标识更新的指示信息。
例如，针对上述图6所示的方法流程中，切换命令中包括上述的第一指示信息；针对上述图8所示的方法流程中，切换命令中包括上述的第三指示信息。
S1340，中间节点向终端设备发送切换指示。
具体地，针对上述图6所示的方法流程中，该切换指示包括上述的第一指示信息。针 对上述图8所示的方法流程中，该切换指示包括上述的第三指示信息。
例如，中间节点通知终端设备#2，终端设备#2的RNTI从YYYY变更为ZZZZ了。该切换指示可以通过RRC信令或MAC CE通知终端设备#2。
具体地，图8所示的方法流程中，还包括S1341，终端设备更新终端设备的标识。例如，终端设备#2接收到中间节点发送的终端设备#2的RNTI从YYYY变更为ZZZZ了的切换指示，终端设备#2更新本地存储的终端设备#2的RNTI YYYY为RNTI ZZZZ。
进一步地，中间节点接入到目的网络设备中，完成网络设备的切换流程。
图6和图8所示的方法流程中，还可能出现终端设备连接失败，即中间节点连接的一个或者多个终端设备可能会发生连接故障无法与中间节点成功连接，下面结合图14详细介绍当中间节点连接的终端设备发生连接失败的时候，中间节点和该中间节点连接的网络设备执行哪些动作。图14是本申请实施例提供的一种终端设备连接失败的示意性流程图。
如图14所示中间节点连接的N个终端设备中的终端设备#2由于某种原因无法与中间节点成功连接。
该终端设备连接失败的方法包括如下步骤：
S1410，中间节点确定终端设备连接失败。
该终端设备为中间节点连接的N个终端设备中的任意一个终端设备。
具体地，本申请中对于中间节点如何确定终端设备连接失败并不限制，例如，可以是中间节点向终端设备发送数据失败，或者是通过其他终端设备上报的信息确定该终端设备发生了故障，无法正常工作。
可选地，当中间节点确定该终端设备再次恢复连接的时候，中间节点可以向网络设备发送连接恢复通知消息，用于向网络设备通知该终端设备已经恢复连接，可以与网络设备进行通信。
S1420，中间节点向网络设备发送连接失败指示信息。
具体地，该连接失败指示信息用于指示上述终端设备与中间节点连接失败。
可选地，中间节点周期性地向网络设备上报自身连接的各个终端设备是否正常连接，如果中间节点确定某个终端设备连接失败，通过上述的连接失败指示信息通知网络设备，其中，连接失败指示信息可以携带在中间节点周期性的上报消息中。
进一步地，网络设备获知某个终端设备连接失败之后，网络设备停止对该终端设备发送指令，也不再通过中间节点对连接失败的终端设备传输数据。中间节点还可以将该终端设备当前的状态通知网络设备，即上述的连接失败指示信息中还可能包括状态信息。其中，状态信息可以是以下信息中的至少一种：该终端设备当前接收到哪几条指令、该终端设备接收到哪些指令，哪些指令还没有反馈收到、该终端设备的RLC状态报告或该终端设备的PDCP状态报告。
图6-图14主要介绍了网络设备经由中间节点向终端设备转发数据包的流程，以及可能发生网络设备切换或终端设备连接失败时网络设备和中间节点的操作。下面结合图15和图16详细介绍侧行链路(sidelink，SL)中网络设备如何为终端设备配置标识。应理解，在本申请中将终端设备之间进行通信称之为侧行链路通信并不对本申请构成任何限定。例如，还可以将侧行链路通信称之为边链路通信、直通链路通信或者副链路通信等。
LTE通信系统中提出的车与任何事物通信(vehicle to everything，V2X)的车联网技 术涉及到SL资源的分配。其中，LTE V2X中的SL资源分配主要为2种方式，mode3和mode4。
mode3即终端设备向网络设备请求SL资源。例如，当终端设备#1有数据要发送给终端设备#2时，向网络设备发送SL的缓存状态报告(buffer status report，BSR)，SL BSR中包含目的终端设备的标识(destination index)、逻辑信道组(logical channel group，LCG)的标识以及对应的缓存量(buffer size)。网络设备收到终端设备#1发送的SL BSR后，会给终端设备分配SL资源。具体地，网络设备通过下行控制信息(downlink control information，DCI)格式5A给终端设备#1分配SL资源，DCI format 5A中主要用于调度物理侧行链路控制信道(physical sidelink control channel，PSCCH)。DCI format 5A中包含载波指示(carrier indicator)、给初传分配的最低子信道标识、SL标识、SL半静态调度(semi-persistent scheduling，SPS)配置标识、激活/释放指示以及后续终端设备#1在SL发送侧行链路控制信息(sidelink control information，SCI)格式1的参数(初传和重传的频域资源、初传和重传的时间间隔)。
接着终端设备#1在SL给终端设备#2发送数据时，会在SCI中包含如下信息：近场通信包优先级(prose per packet priority，PPPP)、资源预留、初传和重传的频域资源位置、初传和重传的时间间隔、调制编码机制以及重传指示等。
mode4方式是网络设备在广播消息中包含SL资源信息，比如包含发送资源池信息和接收资源池信息。所谓资源池可以是一个或多个无线资源块(resource block，RB)组成的频域资源，或者是特定子帧或子帧集合上的一个或多个RB组成的时频域资源。每个载波上可以存在一个或多个资源池。终端设备有数据发送时，自行在发送资源池中进行选择发送。一般情况下，终端设备会先对发送资源池进行感知获得接收信号强度，当发现接收信号强度低于一定门限时，终端选择发送待发数据包。或者说终端设备根据自己待发送数据包的近场通信包优先级(prose per-packet priority，PPPP)和当前正在传输的数据包的PPPP找到对应的门限值，当接收信号强度低于对应的门限值，终端设备选择发送待发送数据包。
现有的SL资源配置模式下通信系统中包括终端设备和网络设备，终端设备可以搜索找到网络设备发送的属于自己的DCI format 5A就能获取SL资源。当在通信系统中的终端设备和网络设备引入调度组头(前文所述的中间节点)后，当终端设备有数据发送时可以向调度组头申请SL资源。但是目前SL通信系统中没有规定中间节点给其他终端设备分配SL资源的方法。在引入调度组头后，称调度组头到终端设备的传输方向为下行传输，终端设备到调度组头的传输方向为上行传输、终端设备到终端设备的传输方向为平行传输。终端设备可能为非上行传输向调度组头申请资源。本文将原来SCI中包含的初传和重传的频域资源位置、初传和重传的时间间隔等称为下行SL资源。
一种可行的方法就是调度组头在发送SCI中除了下行SL资源外，还可以包含非上行SL资源。例如，非上行初传和重传的频域资源位置、非上行初传和重传的时间间隔等。当调度组头在SCI中包含给多个终端设备的非上行SL资源时，需要引入终端设备的标识。
图15是本申请实施例提供的一种配置标识的方法示意图。假设网络设备和中间节点通过蜂窝网空口通信，即中间节点相对于网络设备而言是一个终端设备。中间节点和终端设备通过侧行链路sidelink通信，中间节点相对于终端设备而言是一个侧行链路的调度组头。
该配置标识的方法包括如下步骤：
S1510，网络设备接收中间节点发送的第一关联请求消息。
第一关联请求消息用于请求网络设备为终端设备配置标识。
例如，中间节点通过在上行链路(uplink，UL)RRC消息中携带该第一关联请求消息，第一关联请求消息中包含终端设备在侧行链路的标识(sidelink user equipment identify，SL UE ID)。
图15所示的方法流程中，中间节点向网络设备发送第一关联请求消息之前，会在侧行链路上从终端设备接收到第二关联请求消息。则图15所示的方法流程中还包括S1520，终端设备向中间节点发送第二关联请求消息。例如，终端设备在SL向中间节点发送的SL MAC头中包含SL UE ID即终端设备在侧行链路的标识，SL UE ID可以称为ProSe UE ID。
其中，上述的SL UE ID与本申请中网络设备为终端设备分配的终端设备的标识不同之处包括：SL UE ID一般为24bit。当中间节点使用SL UE ID为终端设备分配资源时，在SCI中包含SL UE ID占用太多空口资源造成浪费。本文假设网络设备为终端设备分配一个中间节点用于识别该终端设备的标识，以减少空口开销。例如当一个中间节点管理30个终端设备时，只需要5bit就足够识别一个终端设备。还例如，设备到设备(device to device，D2D)通信的情况下，中间节点可以将数据包中的可以用于标识终端设备的24bit分成8bit和16bit，其中，8bit携带在SCI中用于识别终端设备，16bit包含在数据包的MAC头用于其他作用(本申请对于节省出来的比特位用途并不限制)，在此情况下终端设备不需要读取到MAC头中的16bit才知道是否为发送给自己的数据，从而降低终端设备侧的处理复杂度。
图15所示的方法流程中还包括中间节点确定自身为调度组头的流程。则图15所示的方法流程还包括，S1511，网络设备向中间节点发送第四指示信息。第四指示信息用于指示中间节点为至少一个终端设备的调度组头，调度组头用于为至少一个终端设备调度侧行链路SL资源。例如，网络设备可以通过在RRC重配置消息中携带该第四指示信息。
应理解，图15所示的方法流程中，网络设备在向中间节点发送第四指示信息之前，需要确定中间节点即为上述的调度组头。具体地，本申请实施例中网络设备确定中间节点为调度组头可以是通过以下任意一种可能的方式：
方式一：中间节点向网络设备申请成为调度组头，或者中间节点向网络设备上报其具有调度组头的能力。在此方式下，图15所示的方法流程还包括S1512，中间节点向网络设备发送请求消息，请求消息用于请求网络设备将中间节点设置为调度组头，或者，请求消息用于通知网络设备中间节点具有调度组头的能力，或中间节点具备SL资源分配和调度的功能。
方式二：核心网通知网络设备中间节点为调度组头。在此方式下，图15所示的方法流程还包括S1513，中间节点向核心网设备发送第六指示信息，第六指示信息用于指示中间节点为高层组头。图15所示的方法流程还包括S1514，核心网设备进行认证，核心网设备认证中间节点为高层组头成功。例如，中间节点在非接入层(non-access stratum，NAS)消息中包含指示中间节点为高层组头的第六指示信息；图15所示的方法流程还包括S1515，核心网设备认证成功之后，向网络设备发送第五指示信息，第五指示信息用于指示中间节点为调度组头。例如，接入管理功能(access and mobility management function，AMF)网元给gNB发送第五指示信息，指示中间节点为高层组头，则后续gNB根据需要将高层组头 设置为调度组头。
进一步地，中间节点获知自身为调度组头之后，需要将调度组头的信息通知给终端设备，则图15所示的方法流程中还包括S1516，中间节点广播发现消息，中间节点在SL广播发现消息，发现消息中包含调度组头指示，还可能包含中间节点所在的高层组的组标识。
S1530，网络设备向中间节点发送关联响应消息。
关联响应消息中包括网络设备为所述终端设备分配的标识。例如，RRC重配置消息中携带该关联响应消息。关联响应消息中包含为终端设备分配的终端设备的标识(user equipment identify，UE ID)，关联响应消息中还可能包含终端设备在侧行链路的标识以及对应的UE ID。
S1540，中间节点向终端设备发送UE ID。
中间节点接收到关联响应消息之后，确定该UE ID，并将该UE ID转发给终端设备，完成为终端设备配置UE ID。例如，中间节点获取终端设备在侧行链路的标识以及对应的UE ID后，通过侧行链路将所述UE ID发送给所述终端设备在侧行链路的标识所对应的终端设备。
完成终端设备的标识配置之后，可选地终端设备在SL给中间节点发送调度请求(scheduling request，SR)或BSR。中间节点向终端设备发送的SL调度结果中包含终端设备的标识以及对应的SL时频资源。例如中间节点在SCI中包含一个或多个终端设备的标识以及对应的SL时频资源。
图16是本申请实施例提供的另一种配置标识的方法示意图。
该配置标识的方法包括如下步骤：
S1610，网络设备向中间节点发送第四指示信息。
第四指示信息用于指示中间节点作为终端设备的调度组头，调度组头用于为终端设备调度侧行链路SL资源，其中，第四指示信息中包括标识集合，标识集合中的标识包括终端设备的标识。
图16所示的方法流程中，网络设备在向中间节点发送第四指示信息之前，需要确定中间节点即为上述的调度组头。具体地，本申请实施例中网络设备确定中间节点为调度组头可以是通过以下任意一种可能的方式：
方式一：与图15中S1511所涉及的方式一类似，这里不再赘述。则与图15类似在此方式下，图16所示的方法流程还包括S1611，中间节点向网络设备发送请求消息。
方式二：与图15中S1511所涉及的方式二类似，这里不再赘述。则与图15类似在此方式下，图16所示的方法流程还包括S1612，中间节点向核心网设备发送第六指示信息以及S1613，核心网设备进行认证和S1614，核心网设备认证成功之后，向网络设备发送第五指示信息。
进一步地，中间节点获知自身为调度组头之后，需要将调度组头的信息通知给的终端设备，则图16所示的方法流程中还包括S1615，中间节点广播发现信息，中间节点在SL广播发现消息，发现消息中包含调度组头指示，还可能包含中间节点所在的高层组的组标识。
中间节点在确定自身为调度组头并且获知了上述的标识集之后，中间节点可以为终端设备配置标识。具体地，图16所示的方法流程中还包括S1620，终端设备向中间节点发送第二关联请求消息。例如，终端设备在SL向中间节点发送的SL MAC头中包含SL UE ID， SL UE ID可以称为ProSe UE ID。
S1630，中间节点确定终端设备的标识。
中间节点从S1610中网络设备分配的标识集中选择一个标识，作为终端设备的标识。
S1640，中间节点向终端设备发送终端设备的标识。
中间节点完成为终端设备配置标识。
完成终端设备的标识配置之后，可选地终端设备在SL给中间节点发送SR或BSR。中间节点向终端设备发送的SL调度结果中包含终端设备的标识以及对应的SL时频资源。例如中间节点在SCI中包含一个或多个终端设备的标识以及对应的SL时频资源。
上面结合图6-图14详细介绍了本申请实施例提供的数据传输的方法，以及结合图15和图16详细介绍了本申请实施例提供的配置标识的方法，下面结合图17-图22详细介绍本申请实施例提供的数据传输的装置。
参见图17，图17是本申请提出的数据传输的装置10的示意图。如图17所示，装置10包括接收单元1710、处理单元1720和发送单元1370。
接收单元1710，用于接收所述中间节点发送的第三DCI和所述第一数据包，所述第三DCI经由所述终端设备的标识进行处理，所述第一数据包包括发送给所述终端设备的数据包；
处理单元1720，用于基于所述终端设备的标识解扰所述第三DCI，获取所述第一数据包。
装置10和方法实施例中的终端设备完全对应，装置10可以是方法实施例中的终端设备，或者方法实施例中的终端设备内部的芯片或功能模块。装置10的相应单元用于执行图6-图16所示的方法实施例中由终端设备执行的相应步骤。
其中，装置10中的接收单元1710执行方法实施例中终端设备接收的步骤。例如，执行图6中的步骤S611，接收网络设备分配的终端设备的标识，或者，执行图6中的步骤S613，接收中间节点分配的终端设备的标识；还执行图6中的步骤S640，接收中间节点发送的第三DCI和第一数据包；还执行图8中的步骤S812，接收网络设备分配的终端设备的标识，或者，执行图8中的步骤S814，接收中间节点分配的终端设备的标识；还执行图8中的步骤S840，接收中间节点发送的第四DCI和第三数据包；还执行图13中的步骤S1340，接收中间节点发送的切换指示；还执行图15中的步骤S1516，接收中间节点广播的发现消息；还执行图15中的步骤S1540，接收中间节点发送的终端设备的标识；还执行图16中的步骤S1615，接收中间节点广播的发现消息；还执行图16中的步骤S1640，接收中间节点发送的终端设备的标识。
装置10中的处理单元1720执行方法实施例中终端设备内部实现或处理的步骤。例如，执行图6中的步骤S641，获取第一数据包；还执行图6中的步骤S841，获取第三数据包；还执行图13中的步骤S1341，更新终端设备的标识。
装置10中的发送单元1730执行方法实施例中终端设备发送的步骤。例如，执行图15中的步骤S1520，向中间节点发送第二关联请求消息以及执行图16中的步骤S1620，向中间节点发送第二关联请求消息。
接收单元1710和发送单元1730可以组成收发单元，同时具有接收和发送的功能。其中，处理单元1720可以是处理器。发送单元1730可以是接收器。接收单元1710可以是 发射器。接收器和发射器可以集成在一起组成收发器。
参见图18，图18是适用于本申请实施例的终端设备20的结构示意图。该终端设备20可应用于图1所示出的系统中。为了便于说明，图18仅示出了终端设备的主要部件。如图18所示，终端设备20包括处理器、存储器、控制电路、天线以及输入输出装置。处理器用于控制天线以及输入输出装置收发信号，存储器用于存储计算机程序，处理器用于从存储器中调用并运行该计算机程序，以执行本申请提出的数据传输的方法中由终端设备执行的相应流程和/或操作。此处不再赘述。
本领域技术人员可以理解，为了便于说明，图18仅示出了一个存储器和处理器。在实际的终端设备中，可以存在多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本申请实施例对此不做限制。
参见图19，图19是本申请提出的数据传输的装置30的示意图。如图19所示，装置30包括处理单元1910、发送单元1920以及接收单元1930。
处理单元1910，用于确定第一DCI和第一数据包，所述第一DCI经由终端设备的标识进行处理，所述第一数据包包括发送给所述终端设备的数据包；
发送单元1920，用于向所述中间节点发送所述第一DCI和所述第一数据包。
装置30和方法实施例中的网络设备完全对应，装置30可以是方法实施例中的网络设备，或者方法实施例中的网络设备内部的芯片或功能模块。装置30的相应单元用于执行图6-图16所示的方法实施例中由网络设备执行的相应步骤。
其中，装置30中的处理单元1910执行方法实施例中网络设备内部实现或处理的步骤。例如，执行图6中的步骤S610，确定第一DCI和第一数据包；还执行图8中的步骤S810，确定第二DCI和第二数据包。
装置10中的发送单元1920执行方法实施例中网络设备发送的步骤。例如，执行图6中的步骤S611，向终端设备分配终端设备的标识；还执行图6中的步骤S620，向中间节点发送第一DCI和第一数据包；还执行图8中的步骤S812，向终端设备分配终端设备的标识；还执行图8中的步骤S811，向中间节点分配中间节点的标识；还执行图8中的步骤S820，向中间节点发送第二DCI和第二数据包；还执行图13中的步骤S1320，向中间节点发送切换命令，具体地，装置30还可以为图13中的目的网络设备，则发送单元1920还执行图13中的步骤S1320，向源网络设备发送切换响应；还执行图15中的步骤S1511，向中间节点发送第四指示信息；还执行图15中的步骤S1530，向中间节点发送关联响应消息；还执行图16中的步骤S1610，向中间节点发送第四指示信息。
装置10中的接收单元1930执行方法实施例中网络设备接收的步骤。例如，执行图6中的步骤S614，接收中间节点发送的终端设备的标识；还执行图8中的步骤S815，接收中间节点发送的N个终端设备的标识；具体地，装置30还可以为图13中的源网络设备，则接收单元1930还执行图13中的步骤S1320，接收目的网络设备发送的切换响应；还执行图14中的步骤S1420，接收中间节点发送的连接失败指示信息；还执行图15中的步骤S1512，接收中间节点发送的请求消息；还执行图15中的步骤S1510，接收中间节点发送的第一关联请求消息；还执行图16中的步骤S1611，接收中间节点发送的请求消息；还执行图16中的步骤S1614，接收核心网设备发送的第五指示信息。
接收单元1930和发送单元1920可以组成收发单元，同时具有接收和发送的功能。其 中，处理单元1910可以是处理器。发送单元1920可以是接收器。接收单元1930可以是发射器。接收器和发射器可以集成在一起组成收发器。
参见图20，图20是适用于本申请实施例的网络设备40的结构示意图，可以用于实现上述数据传输的方法中的网络设备的功能。如可以为基站的结构示意图。如图20所示，该网络设备可应用于如图1所示的系统中。
网络设备40可以包括一个或多个射频单元，如远端射频单元(remote radio unit，RRU)2001和一个或多个基带单元(base band unit，BBU)。基带单元也可称为数字单元(digital unit，DU)2002。所述RRU 2001可以称为收发单元，与图19中的接收单元1930和发送单元1920对应。可选地，该收发单元2001还可以称为收发机、收发电路、或者收发器等，其可以包括至少一个天线2011和射频单元2012。可选地，收发单元2001可以包括接收单元和发送单元，接收单元可以对应于接收器(或称接收机、接收电路)，发送单元可以对应于发射器(或称发射机、发射电路)。所述RRU 2001部分主要用于射频信号的收发以及射频信号与基带信号的转换，例如，用于向终端设备发送上述实施例中所述的控制信息。所述BBU 2002部分主要用于进行基带处理，对基站进行控制等。所述RRU 2001与BBU 2002可以是物理上设置在一起，也可以物理上分离设置的，即分布式基站。
所述BBU 2002为网络设备的控制中心，也可以称为处理单元，可以与处理单元1930对应，主要用于完成基带处理功能，如信道编码，复用，调制，扩频等。例如该BBU(处理单元1910)2002可以用于控制网络设备40执行上述方法实施例中关于网络设备的操作流程，例如，确定承载终端设备的控制信息的符号的长度。
在一个示例中，所述BBU 2002可以由一个或多个单板构成，多个单板可以共同支持单一接入制式的无线接入网(如，LTE系统，或5G系统)，也可以分别支持不同接入制式的无线接入网。所述BBU 2002还包括存储器2021和处理器2022。所述存储器2021用以存储必要的指令和数据。例如存储器2021存储上述实施例中的码本等。所述处理器4022用于控制基站进行必要的动作，例如用于控制基站执行上述方法实施例中关于网络设备的操作流程。所述存储器2021和处理器2022可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
上述BBU 2002可以用于执行前面方法实施例中描述的由网络设备内部实现的动作，而RRU 2001可以用于执行前面方法实施例中描述的网络设备向终端设备发送或从终端设备接收的动作。具体请见前面方法实施例中的描述，此处不再赘述。
另外，网络设备不限于图20所示的形态，也可以是其它形态：例如：包括BBU和自适应无线单元(adaptive radio unit，ARU)，或者包括BBU和有源天线单元(active antenna unit，AAU)；也可以为客户终端设备(customer premises equipment，CPE)，还可以为其它形态，本申请不限定。
应理解，图20所示的网络设备40能够实现图6-图16的方法实施例中涉及的网络设备功能。网络设备40中的各个单元的操作和/或功能，分别为了实现本申请方法实施例中由网络设备执行的相应流程。为避免重复，此处适当省略详述描述。图20示例的网络设备的结构仅为一种可能的形态，而不应对本申请实施例构成任何限定。本申请并不排除未来可能出现的其他形态的网络设备结构的可能。
上述各个装置实施例中网络设备与终端设备和方法实施例中的网络设备或终端设备对应，由相应的模块或单元执行相应的步骤，例如通信单元(收发器)执行方法实施例中接收或发送的步骤，除发送、接收外的其它步骤可以由处理单元(处理器)执行。具体单元的功能可以参考相应的方法实施例。其中，处理器可以为一个或多个。
参见图21，图21是本申请提出的数据传输的装置50的示意图。如图21所示，装置50包括接收单元2110、处理单元2120和发送单元2130。
接收单元2110，用于接收所述网络设备发送的第一DCI和第一数据包，所述第一DCI经由终端设备的标识进行处理，所述第一数据包包括发送给所述终端设备的数据包；
处理单元2120，用于基于所述终端设备的标识解扰所述第一DCI，获得所述第一数据包；
发送单元2130，用于向所述终端设备发送第三DCI和所述第一数据包，所述第三DCI经由所述终端设备的标识进行处理。
装置50和方法实施例中的中间节点完全对应，装置50可以是方法实施例中的中间节点，或者方法实施例中的中间节点内部的芯片或功能模块。装置50的相应单元用于执行图6-图16所示的方法实施例中由中间节点执行的相应步骤。
其中，装置50中的接收单元2110执行方法实施例中中间节点接收的步骤。例如，执行图6中的步骤S612，接收网络设备发送的终端设备的标识；还执行图6中的步骤S620，接收网络设备发送的第一DCI和第一数据包；还执行图8中的步骤S811，接收网络设备发送的中间节点的标识；还执行图8中的步骤S813，接收网络设备发送的N个终端设备的标识；还执行图8中的步骤S820，接收网络设备发送的第二DCI和第二数据包；还执行图13中的步骤S1330，接收网络设备发送的切换命令；还执行图15中的步骤S1511，接收网络设备发送的第四指示信息；还执行图15中的步骤S1510，接收网络设备发送的关联响应消息；还执行图15中的步骤S1520，接收终端设备发送的第二关联请求消息；还执行图16中的步骤S1610，接收网络设备发送的第四指示信息；还执行图16中的步骤S1620，接收终端设备发送的第二关联请求消息。
装置50中的处理单元2120执行方法实施例中中间节点内部实现或处理的步骤。例如，执行图6中的步骤S630，解扰第一DCI获取第一数据包；还执行图8中的步骤S830，解扰第二DCI，分解第二数据包；还执行图14中的步骤S1410，确定终端设备连接失败；还执行图16中的步骤S1630，确定终端设备的标识。
装置50中的发送单元2130执行方法实施例中中间节点发送的步骤。例如，执行图6中的步骤S613，向网络设备发送终端设备的标识；还执行图6中的步骤S613，向终端设备分配终端设备的标识；还执行图6中的步骤S640，向终端设备发送第三DCI和第一数据包；还执行图8中的步骤S815，向网络设备发送N个终端设备的标识；还执行图8中的步骤S814，向终端设备分配终端设备的标识；还执行图8中的步骤S840，向终端设备发送第四DCI和第三数据包；还执行图13中的步骤S1340，向终端设备发送切换指令；还执行图14中的步骤S1420，向网络设备发送连接失败指示信息；还执行图15中的步骤S1512，向网络设备发送请求消息，或者，还执行图15中的步骤S1513，向核心网网络设备发送第六指示信息；还执行图15中的步骤S1510，向网络设备发送第一关联请求消息；还执行图15中的步骤S1540，向终端设备发送终端设备的标识；还执行图16中的步骤 S1611，向网络设备发送请求消息，或者，还执行图16中的步骤S1612，向核心网网络设备发送第六指示信息；还执行图16中的步骤S1640，向终端设备发送终端设备的标识。
接收单元2110和发送单元2130可以组成收发单元，同时具有接收和发送的功能。其中，处理单元2120可以是处理器。发送单元2130可以是接收器。接收单元2110可以是发射器。接收器和发射器可以集成在一起组成收发器。
参见图22，图22是适用于本申请实施例的中间节点60的结构示意图。该中间节点60可应用于图1所示出的系统中。为了便于说明，图22仅示出了中间节点的主要部件。如图22所示，该装置60可以包括处理单元610(即，图21中处理单元520的一例)和存储单元2220。该存储单元2220用于存储指令。
该处理单元2210用于执行该存储单元2220存储的指令，以使装置60实现如上述方法中中间节点执行的步骤。
进一步的，该装置60还可以包括输入口2230和输出口2240(即，图21中接收单元2110和发送单元2130的一例)。进一步的，该处理单元2210、存储单元2220、输入口2230和输出口2240可以通过内部连接通路互相通信，传递控制和/或数据信息。该存储单元2220用于存储计算机程序，该处理单元2210可以用于从该存储单元2220中调用并运行该计算计程序，以控制输入口2230接收信息，控制输出口2240发送信息，完成上述方法中中间节点的步骤。该存储单元2220可以集成在处理单元2210中，也可以与处理单元2210分开设置。
可选地，该输入口2230为接收器，该输出口2240为发送器。其中，接收器和发送器可以为相同或者不同的物理实体。为相同的物理实体时，可以统称为收发器。
本领域技术人员可以理解，为了便于说明，图22仅示出了一个存储器和处理器。在实际的中间节点中，可以存在多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本申请实施例对此不做限制。
本申请实施例还提供一种通信系统，其包括前述的网络设备、一个或多个终端设备和一个或多个中间节点。
本申请还提供了一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当该指令在计算机上运行时，使得计算机执行上述如图6-图16所示的方法中网络设备执行的各个步骤。
本申请还提供了一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当该指令在计算机上运行时，使得计算机执行上述如图6-图16所示的方法中终端设备执行的各个步骤。
本申请还提供了一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当该指令在计算机上运行时，使得计算机执行上述如图6-图16所示的方法中中间节点执行的各个步骤。
本申请还提供了一种包含指令的计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行如图6-图16所示的方法中网络设备执行的各个步骤。
本申请还提供了一种包含指令的计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行如图6-图16所示的方法中终端设备执行的各个步骤。
本申请还提供了一种包含指令的计算机程序产品，当该计算机程序产品在计算机上运 行时，使得计算机执行如图6-图16所示的方法中中间节点执行的各个步骤。
本申请还提供一种芯片，包括处理器。该处理器用于读取并运行存储器中存储的计算机程序，以执行本申请提供的数据传输的方法和配置标识的方法中由终端设备执行的相应操作和/或流程。可选地，该芯片还包括存储器，该存储器与该处理器通过电路或电线与存储器连接，处理器用于读取并执行该存储器中的计算机程序。进一步可选地，该芯片还包括通信接口，处理器与该通信接口连接。通信接口用于接收需要处理的数据和/或信息，处理器从该通信接口获取该数据和/或信息，并对该数据和/或信息进行处理。该通信接口可以是输入输出接口。
本申请还提供一种芯片，包括处理器。该处理器用于调用并运行存储器中存储的计算机程序，以执行本申请提供的数据传输的方法和配置标识的方法中由网络设备执行的相应操作和/或流程。可选地，该芯片还包括存储器，该存储器与该处理器通过电路或电线与存储器连接，处理器用于读取并执行该存储器中的计算机程序。进一步可选地，该芯片还包括通信接口，处理器与该通信接口连接。通信接口用于接收需要处理的数据和/或信息，处理器从该通信接口获取该数据和/或信息，并对该数据和/或信息进行处理。该通信接口可以是输入输出接口。
本申请还提供一种芯片，包括处理器。该处理器用于调用并运行存储器中存储的计算机程序，以执行本申请提供的数据传输的方法和配置标识的方法中由中间节点执行的相应操作和/或流程。可选地，该芯片还包括存储器，该存储器与该处理器通过电路或电线与存储器连接，处理器用于读取并执行该存储器中的计算机程序。进一步可选地，该芯片还包括通信接口，处理器与该通信接口连接。通信接口用于接收需要处理的数据和/或信息，处理器从该通信接口获取该数据和/或信息，并对该数据和/或信息进行处理。该通信接口可以是输入输出接口。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各 个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (25)

  1. 一种数据传输的方法，其特征在于，所述方法包括：
    网络设备确定第一DCI和第一数据包，所述第一DCI经由终端设备的标识进行处理，所述第一数据包包括发送给终端设备的数据包；
    所述网络设备向中间节点发送所述第一DCI和所述第一数据包。
  2. 根据权利要求1所述的方法，其特征在于，在所述网络设备确定所述第一DCI和第一数据包之前，所述方法还包括：
    所述网络设备为所述终端设备分配所述终端设备的标识；所述网络设备向所述中间节点发送所述终端设备的标识；或者，
    所述网络设备接收所述中间节点发送的所述终端设备的标识。
  3. 根据权利要求2所述的方法，其特征在于，所述方法还包括：
    所述网络设备向目标网络设备发送切换请求，所述切换请求用于请求将所述中间节点以及所述终端设备接入所述目标网络设备，其中，所述切换请求中携带所述终端设备的标识；
    所述网络设备接收所述目标网络设备发送的切换响应，所述切换响应包括第一指示信息，所述第一指示信息用于指示所述终端设备的标识需要更新；
    所述网络设备向所述中间节点发送切换命令，其中，所述切换命令中包括所述第一指示信息。
  4. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    所述网络设备接收所述中间节点发送的连接失败指示信息，所述连接失败指示信息用于指示所述终端设备与所述中间节点之间连接失败。
  5. 一种数据传输的方法，其特征在于，所述方法包括：
    中间节点接收网络设备发送的第一DCI和第一数据包，所述第一DCI经由终端设备的标识进行处理，所述第一数据包包括发送给终端设备的数据包；
    所述中间节点基于所述终端设备的标识解扰所述第一DCI，获得所述第一数据包；
    所述中间节点向所述终端设备发送第三DCI和所述第一数据包，所述第三DCI经由所述终端设备的标识进行处理。
  6. 根据权利要求5所述的方法，其特征在于，在所述中间节点接收网络设备发送的第一DCI和第一数据包之前，所述方法还包括：
    所述中间节点为所述终端设备分配所述终端设备的标识；所述中间节点向所述网络设备发送所述终端设备的标识；
    或者，
    所述中间节点接收所述网络设备发送的所述终端设备的标识。
  7. 根据权利要求6所述的方法，其特征在于，所述方法还包括：
    所述中间节点接收所述网络设备发送的切换命令，其中，所述切换命令中包括第一指示信息，所述第一指示信息用于指示所述终端设备的标识需要更新；
    所述中间节点向所述终端设备发送所述第一指示信息。
  8. 根据权利要求6或7所述的方法，其特征在于，所述方法还包括：
    所述中间节点向所述网络设备发送连接失败指示信息，所述连接失败指示信息用于指示所述终端设备与所述中间节点之间连接失败。
  9. 一种数据传输的方法，其特征在于，所述方法包括：
    终端设备接收中间节点发送的第三DCI和第一数据包，所述第三DCI经由所述终端设备的标识进行处理，所述第一数据包包括发送给所述终端设备的数据包；
    所述终端设备基于所述终端设备的标识解扰所述第三DCI，获取所述第一数据包。
  10. 根据权利要求9所述的方法，其特征在于，在所述终端设备接收中间节点发送的第三DCI和第一数据包之前，所述方法还包括：
    所述终端设备接收所述中间节点分配的所述终端设备的标识；
    或者，
    所述终端设备接收所述网络设备分配的所述终端设备的标识。
  11. 根据权利要求9或10所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收所述中间节点发送的第一指示信息，所述第一指示信息用于指示所述终端设备的标识需要更新。
  12. 一种数据传输的装置，其特征在于，所述装置包括：
    处理单元，用于确定第一DCI和第一数据包，所述第一DCI经由终端设备的标识进行处理，所述第一数据包包括发送给终端设备的数据包；
    发送单元，用于向所述中间节点发送所述第一DCI和所述第一数据包。
  13. 根据权利要求12所述的装置，其特征在于，在所述处理单元确定所述第一DCI和第一数据包之前，所述处理单元还用于为所述终端设备分配所述终端设备的标识；
    所述发送单元还用于向所述中间节点发送所述终端设备的标识；或者，
    所述装置还包括：
    接收单元，用于接收所述中间节点发送的所述终端设备的标识。
  14. 根据权利要求13所述的装置，其特征在于，所述发送单元还用于向目标网络设备发送切换请求，所述切换请求用于请求将所述中间节点以及所述终端设备接入所述目标网络设备，其中，所述切换请求中携带所述终端设备的标识；
    所述接收单元还用于接收所述目标网络设备发送的切换响应，所述切换响应包括第一指示信息，所述第一指示信息用于指示所述终端设备的标识需要更新；
    所述发送单元还用于向所述中间节点发送切换命令，其中，所述切换命令中包括所述第一指示信息。
  15. 根据权利要求12或13所述的装置，其特征在于，所述接收单元还用于接收所述中间节点发送的连接失败指示信息，所述连接失败指示信息用于指示所述终端设备与所述中间节点之间连接失败。
  16. 一种数据传输的装置，其特征在于，所述装置包括：
    接收单元，用于接收网络设备发送的第一DCI和第一数据包，所述第一DCI经由终端设备的标识进行处理，所述第一数据包包括发送给终端设备的数据包；
    处理单元，用于基于所述终端设备的标识解扰所述第一DCI，获得所述第一数据包；
    发送单元，用于向所述终端设备发送第三DCI和所述第一数据包，所述第三DCI经 由所述终端设备的标识进行处理。
  17. 根据权利要求16所述的装置，其特征在于，在所述接收单元接收网络设备发送的第一DCI和第一数据包之前，所述处理单元还用于为所述终端设备分配所述终端设备的标识；
    所述发送单元还用于向所述网络设备发送所述终端设备的标识；或者，
    所述接收单元还用于接收所述网络设备发送的所述终端设备的标识。
  18. 根据权利要求17所述的装置，其特征在于，所述接收单元还用于接收所述网络设备发送的切换命令，其中，所述切换命令中包括第一指示信息，所述第一指示信息用于指示所述终端设备的标识需要更新；
    所述发送单元还用于向所述终端设备发送所述第一指示信息。
  19. 根据权利要求17或18所述的装置，其特征在于，所述发送单元还用于向所述网络设备发送连接失败指示信息，所述连接失败指示信息用于指示所述终端设备与所述中间节点之间连接失败。
  20. 一种数据传输的装置，其特征在于，所述装置包括：
    接收单元，用于接收中间节点发送的第三DCI和所述第一数据包，所述第三DCI经由所述终端设备的标识进行处理，所述第一数据包包括发送给终端设备的数据包；
    处理单元，用于基于所述终端设备的标识解扰所述第三DCI，获取所述第一数据包。
  21. 根据权利要求20所述的装置，其特征在于，在所述接收单元接收中间节点发送的第三DCI和所述第一数据包之前，所述接收单元还用于接收所述中间节点分配的所述终端设备的标识；
    或者，
    所述接收单元还用于接收所述网络设备分配的所述终端设备的标识。
  22. 根据权利要求20或21所述的装置，其特征在于，所述接收单元还用于接收所述中间节点发送的第一指示信息，所述第一指示信息用于指示所述终端设备的标识需要更新。
  23. 一种通信设备，其特征在于，包括：
    存储器，所述存储器用于存储计算机程序；
    收发器，所述收发器用于执行收发步骤；
    处理器，所述处理器用于从所述存储器中调用并运行所述计算机程序，使得所述通信设备执行权利要求1-11中任一项所述的方法。
  24. 一种计算机可读存储介质，其特征在于，包括：所述计算机可读介质存储有计算机程序；所述计算机程序在计算机上运行时，使得计算机执行权利要求1-11中任一项所述的方法。
  25. 一种通信系统，其特征在于，包括：
    权利要求12-15中任一项所述的数据传输的装置、权利要求16-19中任一项所述的数据传输的装置以及权利要求20-22中任一项所述的数据传输的装置。
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