WO2018058683A1 - 一种数据传输方法、设备及系统 - Google Patents

一种数据传输方法、设备及系统 Download PDF

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Publication number
WO2018058683A1
WO2018058683A1 PCT/CN2016/101406 CN2016101406W WO2018058683A1 WO 2018058683 A1 WO2018058683 A1 WO 2018058683A1 CN 2016101406 W CN2016101406 W CN 2016101406W WO 2018058683 A1 WO2018058683 A1 WO 2018058683A1
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WO
WIPO (PCT)
Prior art keywords
remote
identifier
relay
data
mac
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PCT/CN2016/101406
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English (en)
French (fr)
Inventor
徐海博
坦尼纳坦·爱德华
王键
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to US16/338,316 priority Critical patent/US11246186B2/en
Priority to EP16917433.1A priority patent/EP3512275B1/en
Priority to EP22193128.0A priority patent/EP4164323A1/en
Priority to AU2016424413A priority patent/AU2016424413B2/en
Priority to PCT/CN2016/101406 priority patent/WO2018058683A1/zh
Priority to CN201680089036.9A priority patent/CN109691197B/zh
Priority to CN202110530455.4A priority patent/CN113438644B/zh
Publication of WO2018058683A1 publication Critical patent/WO2018058683A1/zh
Priority to AU2021202393A priority patent/AU2021202393B2/en
Priority to US17/557,621 priority patent/US20220191971A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/005—Transmission of information for alerting of incoming communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/10—Interfaces between hierarchically different network devices between terminal device and access point, i.e. wireless air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmission method, device, and system.
  • a special device is a user equipment (English: User Equipment, UE) through another UE and network with relay function.
  • the former is called the remote user equipment (English: Remote UE)
  • the latter is called the relay user equipment (English: Relay UE)
  • the communication link between the Remote UE and the Relay UE is called the side line.
  • Link (Sidelink).
  • LTE Long Term Evolution
  • Relay UE In the Long Term Evolution (LTE) protocol standard 13 (English: Release 13, Rel-13), a major problem for Layer 3 based Relay is that the base station receives data from the Relay UE. After that, it is impossible to distinguish whether the data is from the Relay UE's own data or from the data of one of the Remote UEs served by the Relay UE. To solve this problem, 3GPP is currently working on Layer 2 based Relay. For Relay UE-based communication, the Relay UE needs to provide access for multiple Remote UEs at the same time.
  • LTE Long Term Evolution
  • each data stream of the UE is configured with an independent radio bearer (English: Radio Bearer, RB), so that each data stream is transmitted to the base station by using a separate radio bearer, and each radio bearer has a unique logical channel identifier (English: Logical Channel ID (LCID), so that the base station distinguishes which UE the received data comes from according to the LCID.
  • RB Radio Bearer
  • LCID Logical Channel ID
  • the current LCID is only 5 bits, and its value is limited, that is, only 0 to 32 values exist, and some of the values are already used to indicate other information, such as: Medium Access Control Control Unit (English: Medium Access Control) Control Element, MAC The type of CE), when the number of Remote UEs provided by the Relay UE is large, or the number of data streams of each Remote UE is large, the current limited LCID value cannot support the Relay UE to independently configure one data stream for each Remote UE.
  • a radio bearer with a unique identifier which seriously affects the normal transmission of data of the Remote UE, and still cannot well solve the problem of how to distinguish the data from the UE/Relay UE to which UE (Relay UE or Relay UE is connected) Remote UE).
  • the present application provides a data transmission method, device, and system, to solve how to distinguish, at a base station, data of a UE (Relay UE or a Remote UE connected to a Relay UE) from which a received Relay UE is transmitted, and It is solved how to distinguish at the Relay UE whether the data transmitted by the base station received by itself is transmitted to which UE (Relay UE or a Remote UE connected to the Relay UE).
  • a data transmission method is provided, which is performed by a Relay UE, and may include:
  • the first identifier transmits data of the Remote UE to the base station.
  • the first identifier may be a layer 2 address of the Remote UE, such as a source MAC address or a user equipment identifier used for device-to-device communication in the LTE system.
  • the second identifier of the Remote UE is also sent to the base station, so that the base station identifies, according to the received second identifier of the Remote UE, which Remote UE sends the Relay UE.
  • the data when the Relay UE sends data to the base station, the second identifier of the Remote UE is also sent to the base station, so that the base station identifies, according to the received second identifier of the Remote UE, which Remote UE sends the Relay UE. The data.
  • the data of the Remote UE may be sent to the base station by using the radio bearer established by the Relay UE for the Remote UE.
  • the first aspect is implemented. In a manner, in combination with the first aspect, the method may further include:
  • the Relay UE determines a first radio bearer corresponding to the data of the Remote UE
  • the relay UE sends data to the base station through the first radio bearer corresponding to the data, and the second identifier of the Remote UE and the LCID of the first radio bearer corresponding to the data are sent together with the data.
  • a first radio bearer may be configured for the data belonging to the same data stream, or may belong to The data of different data flows is configured with a first radio bearer, which is not limited by the embodiment of the present invention.
  • the identifier or LCID of the first radio bearer corresponding to the same Remote UE is unique, and the first radio bearer between different Remote UEs is different.
  • the identifier or the LCID may be the same, that is, the identifier of the radio bearer or the LCID may repeatedly identify the radio bearers of different Remote UEs.
  • the second identifier of the Remote UE and the identifier or LCID of the radio bearer corresponding to the data of the Remote UE may also be sent to the base station, so that the base station according to the received Remote UE.
  • the two identifiers, and the identifiers or LCIDs of the radio bearers identify which of the remote UEs of the Relay UE is the data transmitted on the received data.
  • different Remote UEs in the foregoing implementation manner may reuse the identifier or LCID of the radio bearer, thereby avoiding the problem that the existing radio bearer identifier or LCID is limited.
  • the determining, by the relay UE, that the first radio bearer corresponding to the data of the remote UE may include:
  • the Relay UE receives the bearer sent by the Remote UE through the at least one second radio bearer.
  • the data corresponding to the identifier of each second radio bearer or the LCID of each second radio bearer is determined according to the identifier of each second radio bearer or the LCID of each second radio bearer.
  • a wireless bearer is used to determine the identifier of each second radio bearer or the LCID of each second radio bearer.
  • the Relay UE can determine the radio bearer between the Relay UE and the base station according to the radio bearer that transmits data between the Remote UE and the Relay UE.
  • the relay UE may combine the second identifier of the Remote UE and the first radio bearer corresponding to the data, in combination with the implementation manner of the first aspect or the first aspect.
  • the LCID and the data are carried in the Medium Access Control Protocol Data Unit MAC PDU to the base station.
  • the second identifier of the remote UE may be carried in the first MAC subheader or the MAC CE in the MAC PDU, and the LCID of the first radio bearer corresponding to the data is carried in the second MAC subheader in the MAC PDU. It is sent to the base station in a MAC SDU carried in the MAC PDU.
  • the second identifier of the Remote UE is included in the first MAC subheader, and the LCID of the first radio bearer corresponding to the data is carried in the second MAC subheader in the MAC PDU, and the data is carried in the MAC PDU.
  • a MAC SDU is sent to the base station, where the second MAC subheader can also be used to indicate that the MAC PDU includes data of the Remote UE.
  • the first MAC subheader includes a bitmap bitmap, and the bitmap includes at least one bit, wherein the bit n in the at least one bit is used to indicate whether the MAC PDU includes the second connection with the Relay UE.
  • the second identifier of the Remote UE is associated with the bit in the bitmap; the LCID of the first radio bearer corresponding to the data is carried in the second MAC subheader in the MAC PDU, and the data carries a MAC in the MAC PDU.
  • the SDU is sent to the base station, where the second MAC subheader can also be used to indicate that the data of the Remote UE is included in the MAC PDU.
  • the MAC CE includes a second identifier of the Remote UE, and
  • the LCID of the first radio bearer corresponding to the data is carried in the second MAC subheader in the MAC PDU, and the data is carried in a MAC SDU in the MAC PDU to be sent to the base station; correspondingly, the MAC PDU may further include a third MAC Subheader.
  • the third Subheader includes an LCID for indicating that the MAC CE is the second identifier that includes the Remote UE.
  • the MAC CE includes a bitmap, and the bitmap includes at least one bit, where the bit n of the at least one bit is used to indicate whether the second identifier of the MAC PDU that is connected to the Relay UE is n.
  • the data is carried in a MAC SDU in the MAC PDU, and the MAC PDU may further include a fourth MAC Subheader, where the fourth MAC Subheader includes a MAC CE for indicating that the MAC CE is a bitmap.
  • the Relay UE can carry the second identifier of the Remote UE, the LCID of the first radio bearer corresponding to the data, and the data in the medium access control protocol data unit MAC PDU to the base station by using the method as shown in FIG. 4a to FIG. 4b. send.
  • the method may further include:
  • the base station schedules the uplink data of the Remote UE/Relay UE
  • the downlink control information Downlink Control Information, DCI
  • DCI Downlink Control Information
  • the relay UE may determine, according to the second identifier, whether the uplink resource allocated in the downlink control information is used to send data of itself or data of one of the remote UEs. For example, the data of the Remote UE may be sent on the resource indicated by the DCI according to the second identifier of the Remote UE in the DCI.
  • the second identifier is included in the downlink control information sent to the relay UE, that is, when the relay UE decodes the DCI. Will follow the DCI The number of bits and format after the second identifier is included to decode the DCI. Otherwise, the Relay UE decodes the DCI according to the number of bits and format included in the current DCI.
  • the DCI sent by the base station is the uplink data transmission of the scheduling Relay UE
  • the second identifier is included in the DCI, for example, it can be set to 0000 (assuming that the index is represented by 4 bits).
  • the relay UE may send data to the base station according to the resource corresponding to the Remote UE indicated by the DCI delivered by the base station, so that the base station determines, according to the resource location, which Remote Data the received data is sent.
  • the relay UE may determine the Remote UE according to the first identifier by adopting the following manners 1 or 2 in any one of the implementation manners of the first aspect or the first aspect.
  • Second logo
  • the Relay UE receives a first identity connection establishment request that is sent by the Remote UE to request the Relay UE to establish a connection with the Remote UE and includes the Remote UE, and sends a notification message including the first identifier of the Remote UE to the base station.
  • a response message that includes a mapping between the second identifier of the remote UE and the first identifier determined by the base station, and determining, according to the response message, a second identifier of the remote UE and a mapping relationship between the second identifier and the first identifier;
  • the Relay UE receives a connection establishment request sent by the Remote UE to request the Relay UE to establish a connection with the Remote UE and includes the first identifier of the Remote UE, determines a second identifier of the Remote UE, and determines a second identifier of the Remote UE. Establish a mapping relationship with the first identifier of the Remote UE;
  • the method may further include:
  • the relay UE includes a mapping relationship between the second identifier of the Remote UE and/or the second identifier and the first identifier to the base station, so that the base station determines the second identifier of the Remote UE according to the received information.
  • the Relay UE may determine the second identifier of the Remote UE according to the foregoing manner 1 or 2.
  • the base station When the relay UE sends data of multiple UEs (Remote UEs or Relay UEs), the data of the UE, the identifier of the radio bearer of the UE, and the second identifier of the UE may be sent to the Relay UE together with reference to the foregoing method. Therefore, the relay UE determines, according to the received data of the UE, the identifier of the radio bearer of the UE, and the second identifier of the UE, to which UE (either the remote UE or the remote UE connected thereto), .
  • a data transmission method which is performed by a base station, and the method may include:
  • the base station determines the first radio bearer corresponding to the data of the Remote UE, and sends the data of the Remote UE to the Relay UE by using the first radio bearer, and the LCID of the first radio bearer and the Remote UE of the Remote UE are sent together with the data.
  • the second logo is the first radio bearer corresponding to the data of the Remote UE, and sends the data of the Remote UE to the Relay UE by using the first radio bearer, and the LCID of the first radio bearer and the Remote UE of the Remote UE are sent together with the data.
  • the second logo is the first radio bearer corresponding to the data of the Remote UE, and sends the data of the Remote UE to the Relay UE by using the first radio bearer, and the LCID of the first radio bearer and the Remote UE of the Remote UE are sent together with the data.
  • the configuration parameter of each first radio bearer in the at least one first radio bearer may include an identifier of the first radio bearer and/or a logical channel identifier LCID corresponding to the first radio bearer.
  • a first radio bearer may be configured for data belonging to one data stream, or may belong to different data streams.
  • the data is configured with a first radio bearer, which is not limited by the embodiment of the present invention.
  • the identifier or LCID of the first radio bearer corresponding to the same Remote UE is unique, and the identifier or LCID of the first radio bearer between different Remote UEs may be The same, that is, the identifier or LCID of the radio bearer can repeatedly identify the radio bearers of different Remote UEs.
  • the base station may carry the second identifier of the Remote UE and the LCID of the radio bearer where the data of the Remote UE is located, and send the second identifier of the Remote UE, and The identifier of the radio bearer or LCID to distinguish which radio bearer data is the number of UEs according to.
  • the base station may also use the data of the Remote UE and the identifier of each radio bearer of the Remote UE by using the solution as shown in FIG. 4a to FIG. 4b.
  • the LCID and the second identifier of the Remote UE are sent to the Relay UE, and the details are not repeated here.
  • the method may further include:
  • the second identifier of the Remote UE or the Relay UE for which the scheduling information is targeted is added to the DCI (for example, the DCI format 1A) that schedules the downlink data, according to the second identifier, the Relay The UE may determine whether the received downlink data is data sent to itself or data of one of the Remote UEs.
  • the second identifier is included in the downlink control information sent to the relay UE, that is, when the relay UE decodes the DCI.
  • the DCI is decoded according to the number and format of bits in the DCI including the second identifier.
  • the Relay UE decodes the DCI according to the number of bits and format included in the current DCI.
  • the DCI sent by the base station is the uplink data transmission of the scheduling Relay UE
  • the second identifier is included in the DCI, for example, it can be set to 0000 (assuming that the index is represented by 4 bits).
  • the Relay UE can receive the data sent by the base station according to the resource corresponding to the Remote UE indicated by the DCI sent by the base station, so that the Relay UE determines, according to the resource location, which Remote UE data is the received data.
  • the base station may determine the second identifier of the Remote UE by using the following manner:
  • Manner 1 The base station receives the first identifier of the Remote UE reported by the Remote UE, and establishes a mapping relationship between the first identifier of the Remote UE and the C-RNTI of the Remote UE.
  • Manner 2 The base station receives the first identifier of the Remote UE that is reported by the remote UE, and establishes a mapping relationship between the first identifier of the Remote UE and the C-RNTI of the Remote UE.
  • the base station receives the notification message that is sent by the relay UE and includes the second identifier of the remote UE, and returns a response message for notifying the relay UE to provide the connection for the remote UE, and the base station identifies the second identifier of the remote UE with the remote UE.
  • the C-RNTI establishes a mapping relationship.
  • the base station may determine the second identifier of the Remote UE according to the foregoing manner 1 or 2.
  • a Relay UE is provided, and the Relay UE may include:
  • a receiving unit configured to receive data of a Remote UE, where the data includes a first identifier of the Remote UE;
  • a determining unit configured to determine, according to the first identifier received by the receiving unit, a second identifier of the remote UE, where the second identifier is a unique identifier of the Remote UE under the Relay UE;
  • a sending unit configured to send, to the base station, data of the Remote UE received by the communication interface, and a second identifier of the Remote UE.
  • the Relay UE provided by the third aspect can achieve the same advantageous effects as the first aspect.
  • a fourth aspect provides a relay UE, where the Relay UE may include:
  • a communication interface configured to receive data of a Remote UE, where the data includes a first identifier of the Remote UE;
  • a processor configured to determine, according to the first identifier received by the communications interface, a second identifier of the remote UE, where the second identifier is a unique identifier of the Remote UE under the Relay UE;
  • the communication interface is further configured to send, to the base station, the received by the communication interface The data of the Remote UE and the second identifier of the Remote UE.
  • the Relay UE provided by the fourth aspect can achieve the same advantageous effects as the first aspect.
  • the present invention provides a non-transitory computer readable storage medium storing one or more programs, the one or more programs comprising instructions, when included in the third aspect or the fourth aspect or any of the above
  • the Relay UE is executed, the Relay UE is caused to perform the following events:
  • the unique identifier is sent to the base station, the data of the Remote UE received by the communication interface, and the second identifier of the Remote UE.
  • the Relay UE provided by the fifth aspect can achieve the same advantageous effects as the first aspect.
  • a sixth aspect provides a base station, where the base station can include:
  • a sending unit configured to send, to the Relay UE, a configuration for establishing at least one first radio bearer for transmitting data of a Remote UE connected to the Relay UE between the base station and the Relay UE, and including at least one first radio bearer The first message of the parameter,
  • a receiving unit configured to acquire data of the Remote UE
  • a determining unit configured to determine a second identifier of the Remote UE, and determine a first radio bearer corresponding to the data of the Remote UE;
  • the sending unit is further configured to send the data of the Remote UE to the Relay UE by using the first radio bearer, and the LCID of the first radio bearer and the second identifier of the Remote UE are sent together with the data.
  • the base station provided by the sixth aspect can achieve the same advantageous effects as the second aspect.
  • a seventh aspect provides a base station, where the base station can include:
  • a communication interface configured to send, to the Relay UE, a configuration for establishing at least one first radio bearer for transmitting data of a Remote UE connected to the Relay UE between the base station and the Relay UE, and including at least one first radio bearer The first message of the parameter,
  • the communication interface is further configured to acquire data of a Remote UE
  • a processor configured to determine a second identifier of the Remote UE, and determine a first radio bearer corresponding to the data of the Remote UE;
  • the communication interface is further configured to send the data of the Remote UE to the Relay UE by using the first radio bearer, and the LCID of the first radio bearer and the second identifier of the Remote UE are sent together with the data.
  • the base station provided by the seventh aspect can achieve the same advantageous effects as the second aspect.
  • the present invention provides a non-transitory computer readable storage medium storing one or more programs, the one or more programs comprising instructions, when included in the third aspect or the fourth aspect or any of the above
  • the Relay UE is executed, the Relay UE is caused to perform the following events:
  • the specific implementation manner of the eighth aspect may refer to the behavior function of the base station in the data transmission method provided by the second aspect or the possible implementation manner of the second aspect, and details are not repeatedly described herein. Therefore, the base station provided by the eighth aspect can achieve the same advantageous effects as the second aspect.
  • a data transmission system including a Remote UE, the Relay UE according to the third aspect or the fourth aspect or the fifth aspect or any of the foregoing implementation manners, the sixth aspect or the seventh aspect or the The base station of any of the eight aspects or any of the foregoing implementations.
  • the system described in the ninth aspect is used to implement the data transmission method shown in the foregoing first aspect or the second aspect. Therefore, the same beneficial effects as the data transmission method described above can be achieved, and details are not repeatedly described herein.
  • FIG. 1 is a schematic diagram of a network architecture according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of still another network architecture according to an embodiment of the present disclosure.
  • FIG. 3 is a flowchart of a data transmission method according to an embodiment of the present invention.
  • FIG. 3a is a flowchart of a data transmission method according to an embodiment of the present invention.
  • FIG. 4a is a schematic structural diagram of a MAC PDU provided by the present invention.
  • 4b is a schematic structural diagram of a MAC PDU according to the present invention.
  • 4c is a schematic structural diagram of a MAC PDU provided by the present invention.
  • 4d is a schematic structural diagram of a MAC PDU provided by the present invention.
  • FIG. 5 is a flowchart of a data transmission method according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of a method for determining an index of a Remote UE according to an embodiment of the present invention
  • FIG. 7 is a flowchart of a method for determining an index of a Remote UE according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of a method for determining an index of a Remote UE according to an embodiment of the present invention
  • FIG. 9 is a structural diagram of a base station 10 according to an embodiment of the present invention.
  • FIG. 10 is a structural diagram of a Relay UE 20 according to an embodiment of the present invention.
  • FIG. 11 is a structural diagram of a data transmission system according to an embodiment of the present invention.
  • the principle of the present invention is: configuring an identifier for each Remote UE that is connected to the Relay UE, and the identifier is a unique identifier of the Remote UE under the Relay UE, and the Remote UE forwards the data of the Remote UE to the base station, and the Remote UE
  • the UE identifier is sent to the base station together, so that the base station determines, according to the identifier of the remote UE, which received data is the data of the Remote UE that is connected to the Relay UE; for example, the relay UE may receive the data sent by the Remote UE1 and the data of the Remote UE1.
  • the identification is sent to the base station together.
  • FIG. 1 is a schematic diagram of a network architecture according to an embodiment of the present invention, where the network is applicable.
  • the network architecture may include: a base station 10, a Relay UE 20 in coverage of the base station 10, and a plurality of Remote UEs 30 connected to the Relay UE 20; the base station 10 may be an evolved base station in LTE (English: Evolutional Node B, eNB or e-NodeB), the invention is not limited.
  • the Relay UE20 can be (English: User Uniqupment, UE), user equipment (Terminal), mobile station (English: Mobile Station, MS), mobile user equipment (Mobile Terminal), and can also be the smart mobile wearer of the wearable device.
  • the terminal or the like is not limited in the present invention, and the Relay UE 20 can communicate with the base station 10 via a radio access network (English: Radio Access Network, RAN).
  • the Remote UE 30 has the characteristics of small size, small battery capacity, and low power consumption.
  • it can be a wearable device, wherein the wearable device includes but is not limited to a smart watch, a smart ring, a smart wristband, smart glasses, and a smart necklace. Smart wearable devices such as smart rings, smart earrings, and smart phones.
  • the Remote UE 30 can communicate with the base station 10 through the Relay UE 20.
  • the communication link between the Remote UE 30 and the Relay UE 20 can be called a Sidelink, and the Remote UE 30 and the Relay UE 20 can be based on a communication method such as WLAN or Bluetooth technology.
  • the communication can also be performed based on the LTE Sidelink communication technology, which is not limited in this embodiment of the present invention.
  • FIG. 1 is only a schematic diagram, and the number of devices in FIG. 1 is not limited to the technical solution provided by the present invention. In actual deployment, the number of devices different from that shown in FIG. 2 may be deployed.
  • the base station 10 may include: a communication interface 1011, a processor 1012, a memory 1013, and at least one communication bus 1014 for implementing connection and mutual communication between the devices;
  • the Relay UE 20 may include: communication The interface 2011, the processor 2012, the memory 2013, and the at least one communication bus 2014 are used to implement the connection and mutual communication between the devices;
  • the Remote UE 30 may include: a communication interface 3011, a processor 3012, a memory 3013, and at least one communication bus 3014. Used to achieve the connection and mutual communication between these devices.
  • the communication interface 1011, the communication interface 2011, and the communication interface 3011 can be implemented by an antenna, and can be used for data interaction with an external network element.
  • the communication interface 1011 of the base station 10 can send and receive data packets with the Relay UE 20 or Resource request information;
  • the communication interface 2011 of the Relay UE 20 can transmit and receive data packet or resource request information between the UE or the base station 10 or the Remote UE 30.
  • the communication interface 3011 can send the data of the Remote UE 30 and other information to the communication interface 2011.
  • the communication interface 2011 sends data or other information to the communication interface 1011 through the radio bearer between the Relay UE 20 and the base station. Handed over by the base station 10.
  • the processor 1012, the processor 2012, and the processor 3012 may be a central processing unit (CPU), or may be an application specific integrated circuit (ASIC), or configured to be configured.
  • the processor 1012, the processor 2012, and the processor 3012 have processing management functions. Specifically, the processor 1012 can process the data or information sent by the received Relay UE 20, and the processor 2012 can send the data sent by the received Remote UE 30. Or the information is processed, and the processor 3012 may process the data or information generated by the Remote UE 30 itself or process the information or data sent by other devices.
  • the memory 1013, the memory 2013, and the memory 3013 may be a volatile memory such as a random access memory (RAM) or a non-volatile memory.
  • RAM random access memory
  • non-volatile memory For example, read-only memory (English: Read-Only Memory, ROM), flash memory, hard disk drive (HDD) or solid state drive (SSD); or the above type of memory
  • the data 1010, the memory 2013, and the memory 3013 may store data or program code supporting the data transmission method according to the embodiment of the present invention, so that the processor 1012, the processor 2012, and the processor 3012 are configured according to the memory in the device where they are located.
  • the data or program code stored in the embodiment performs the data transmission method provided by the embodiment of the present invention.
  • the communication bus 1014, the communication bus 2014, and the communication bus 3013 can be divided into an address bus, a data bus, a control bus, etc., and can be an industry standard architecture (English: Industry Standard Architecture, ISA) bus, and an external device interconnection (English: Peripheral Component, PCI) bus or extended industry standard architecture (English: Extended Industry Standard Architecture, EISA) bus.
  • Industry Standard Architecture ISA
  • PCI Peripheral Component
  • EISA Extended Industry Standard Architecture
  • the communication interface 2011 of the Relay UE 20 may determine, after receiving the first identifier of the Remote UE 30, that the data sent by the communication interface 3011 of the Remote UE 30 includes the first identifier of the Remote UE 30, the processor 2012 of the Relay UE 20 determines the number of the Remote UE 30 according to the first identifier of the Remote UE 30.
  • the second identifier is sent by the communication interface 2011 to the base station and the second identifier of the Remote UE 30.
  • the first identifier may be a Layer 2 address of the Remote UE. If the communication technology between the Remote UE and the Relay UE is an LTE sidelink (Sidelink) technology, the first identifier may be Remote.
  • the user equipment identifier used by the UE for device-to-device communication may be a service user equipment identifier (ProSe UE ID) of the Remote UE; if the communication technology between the Remote UE and the Relay UE is Bluetooth or a wireless local area network (English: The wireless local area network (WLAN) technology, the first identifier may be a source access control (MAC) address of the Remote UE.
  • MAC source access control
  • the second identifier may be referred to as a Remote UE Index (Remote UE Index) or a Remote UE ID, which is a unique identifier of the Remote UE when the Remote UE is connected to the Relay UE, and may be represented by a plurality of bit numbers.
  • the number of bits indicating the Remote UE Index depends on the maximum number of Remote UEs that can be connected under the Relay UE. For example, if the Relay UE can connect up to 4 Remote UEs, you can use 2bit to represent the Remote UE Index.
  • the index when connecting to Relay UE1 may be: Remote UE Index1
  • the index when connecting with Relay UE2 may be: Remote UE Index2.
  • the following embodiment shows the process of the data transmission method provided by the present invention by taking the first identifier as the Layer 2 ID of the Remote UE and the index of the second identifier as the Remote UE as an example.
  • the steps can also be performed in a set of computer systems that execute instructions.
  • the logical order is shown in the figure, However, in some cases, the steps shown or described may be performed in a different order than the ones described herein.
  • FIG. 3 is a flowchart of a data transmission method according to an embodiment of the present invention. The method is performed by the device shown in FIG. 1 or FIG. 2, and the method may be applied to: the Relay UE sends the relay UE to the base station. A scenario of data of at least one Remote UE; as shown in FIG. 3, the method may include the following steps:
  • the Relay UE receives data of the Remote UE, where the data includes a Layer 2 ID of the Remote UE.
  • the Remote UE may be any Remote UE connected to the Relay UE, and the Relay UE may receive the data sent by the Remote UE through a Sidelink or a WLAN or Bluetooth link between the Relay UE and the Remote UE.
  • the Relay UE determines an index of the Remote UE according to the Layer 2 ID of the Remote UE.
  • the process of determining, by the Relay UE, the index of the Remote UE may refer to the scheme shown in FIG. 6 or FIG. 7 or FIG. 8 .
  • the Relay UE sends the data of the Remote UE and the index of the Remote UE to the base station.
  • the Relay UE can send the data of the Remote UE and the index of the Remote UE to the base station together, so that the base station determines, according to the index of the Remote UE, which of the Remote UE data is received by the Relay UE according to the index of the Remote UE.
  • the Relay UE when the Relay UE sends the data of the Remote UE to the base station, the Relay UE may create multiple radio bearers for the Remote UE, and send data to the base station through the radio bearer, and at the same time, to avoid In the prior art, the radio bearer identifier or the LCID value of the radio bearer is limited.
  • the radio bearer of the same Remote UE can be configured with a unique radio bearer identifier and/or LCID, and the first between different Remote UEs.
  • the radio bearer is configured with the same radio bearer identifier and/or logical channel identifier.
  • the implementation manner is as shown in FIG. 3a, and may include the following steps:
  • the Relay UE receives the first message sent by the network device, where the first message is used. And establishing at least one first radio bearer for transmitting data of the Remote UE connected to the Relay UE between the base station and the Relay UE, where the first message includes configuration parameters of the at least one first radio bearer.
  • the network device may be a base station, and the configuration parameters of each of the at least one first radio bearer include: an identifier of the first radio bearer and/or a logical channel identifier LCID corresponding to the first radio bearer.
  • the Relay UE establishes at least one first radio bearer for the Remote UE according to the configuration parameter of the at least one first radio bearer.
  • the first radio bearer is a radio bearer that transmits data of the Remote UE connected to the Relay UE between the Relay UE and the base station, and the process of establishing the first radio bearer according to the configuration parameter of the first radio bearer is a prior art. , will not be described in detail here.
  • Step 203 The Relay UE receives data sent by the Remote UE through the at least one second radio bearer, where the data carries: an identifier of each second radio bearer and/or an LCID of each second radio bearer, and a Layer of the Remote UE. 2ID.
  • the Relay UE determines an index of the Remote UE according to the Layer 2 ID of the Remote UE.
  • the process of determining, by the Relay UE, the index of the Remote UE may refer to the scheme shown in FIG. 6 or FIG. 7 or FIG. 8 .
  • the Relay UE determines a first radio bearer corresponding to the data of the Remote UE.
  • the Relay UE may determine, according to the identifier of the second radio bearer received in step 203 and/or the LCID of each second radio bearer, the first radio bearer corresponding to the data of the Remote UE.
  • the Relay UE sends the data to the base station by using the first radio bearer corresponding to the data, and the index that is sent to the base station together with the data, further includes the index of the Remote UE, and the first corresponding to the data.
  • the LCID of the radio bearer is the information that is sent to the base station together with the data.
  • a radio bearer may be established for each data stream that includes multiple data, where each radio bearer may be configured.
  • the radio bearers of different remote UEs may have the same radio bearer identifier and/or LCID, and different radio bearers under the same Remote UE have different radio bearer identifiers and/or Or LCID.
  • the relay UE may also send its own data while transmitting the data of the received Remote UE to the base station, which is not limited in this embodiment of the present invention, that is, the present invention may adopt the scheme shown in FIG. 3a.
  • the base station simultaneously transmits data of multiple UEs (Remote UEs or Relay UEs), except that the data of which UE (Remote UE or Relay UE) is sent only needs to carry the index for identifying the UE while transmitting data. And identifying the LCID of the corresponding radio bearer, so that the base station can distinguish which UE is transmitted by which radio bearer after receiving the data.
  • the relay UE can carry the data of the remote UE and the LCID of the radio bearer corresponding to the data of the remote UE, and the reuse of the LCID can be avoided in the prior art.
  • the LCID has a limited value.
  • the index of the Remote UE is sent to distinguish which data is sent by the Remote UE for the data on the radio bearer with the same LCID.
  • the Relay UE may use the following schemes (1.1) to (1.5) to remote UEs.
  • Data, Remote UE The LCID of each radio bearer and the Index of the Remote UE are sent to the base station, where N is an integer greater than or equal to 1:
  • the Remote UE for scheduling information is added to the Downlink Control Information (DCI) (for example, DCI format 0) for scheduling uplink data. Or the index of the Relay UE. According to the Index, the Relay UE may determine whether the uplink resource allocated in the downlink control information is data for transmitting its own data or one of the Remote UEs. For example, the data of the Remote UE may be sent on the resource indicated by the DCI according to the index of the Remote UE in the DCI.
  • DCI Downlink Control Information
  • the index is included in the downlink control information sent to the relay UE, that is, the relay UE will follow the DCI when decoding the DCI.
  • the DCI includes the number of bits and the format after the Index to decode the DCI. Otherwise, the Relay UE decodes the DCI according to the number of bits and format included in the current DCI.
  • the Index is included in the DCI, and may be set to, for example, 0000 (assuming that the index is represented by 4 bits).
  • MAC PDU Medium Access Control Protocol Data Unit
  • the MAC PDU may include: a MAC Header and a MAC Service Data Unit (MAC SDU), and the plurality of MAC SDUs include N and Remote.
  • the N radio bearers of the UE are one-to-one corresponding MAC SDUs, and each of the MAC SDUs in the N MAC SDUs may include data on the radio bearers corresponding to the MAC SDUs, that is, the data on each radio bearer of the Remote UE is respectively Corresponding to be carried in the MAC SDU;
  • the MAC Header may include multiple media subheaders, and the multiple MAC Subheaders may include a first MAC Subheader and N second MAC Subheaders, N second MAC Subheaders and N none. Line bearing one-to-one correspondence;
  • the first MAC Subheader may include: an Index of the Remote UE;
  • Each of the N second MAC Subheaders may include an LCID
  • the second MAC Subheader includes an LCID for identifying a radio bearer corresponding to the second MAC Subheader, and indicating a MAC SDU corresponding to the radio bearer.
  • the data on the plurality of radio bearers corresponding to the Remote UE are respectively carried on the plurality of MAC SDUs and sent to the base station, and at the same time, the MAC Subheader has a corresponding corresponding to the Remote UE.
  • the Relay UE receives the data 1, data 2 sent by the Remote UE1, the data 1, the data 2 sent by the Remote UE2, and the data 1 and data 2 sent by the Relay UE for the Remote UE1 are respectively established.
  • Radio Bearer The radio bearer with the LCID configured as the LCID1 and the radio bearer with the LCID1 configured as the LCID2, and the radio bearer for the data and data 2 sent by the Remote UE2: the radio bearer with the LCID1 configured as the LCID1
  • the logical channel identifier LCID is configured as the radio bearer of the LCID2, and the Relay UE fills the data 1 and data 2 sent by the Remote UE1, which are simultaneously received, into the MAC SDU1 and the MAC SDU2, and the data 1 and data 2 sent by the Remote UE2.
  • the MAC SDU3 and the MAC SDU4 are respectively filled in, and the index of the Remote UE1 is filled in the MAC Subheader1 in the MAC PDU: Remote UE Index1, the LCSub1 is filled in the MAC Subheader2, the LCID2 is filled in the MAC Subheader3, and the MAC Subheader4 is in the MAC PDU.
  • the MAC Subheader filling the Remote UE Index may include other bits, such as a Tbit and a reserved (R) bit, in addition to the Remote UE Index.
  • the value of the Tbit may be used to indicate that the next MAC Subheader adjacent to the MAC Subheader is a newly defined inclusion.
  • the Subheader of the UE Index is similar to the Subheader including the LCID defined in the MAC PDU on the current uplink and downlink; in addition, as shown in FIG.
  • the MAC PDU may further include: a media access control control unit (English: MAC Control)
  • the MAC Header may also include a MAC Subheader corresponding to the MAC CE and a Padding Subheader corresponding to the Padding, which is not limited in this embodiment of the present invention.
  • the MAC Subheader there are currently two reserved bits in the MAC Subheader that contains the LCID.
  • One of the reserved bits may be used to indicate whether the next MAC Subheader adjacent to the MAC Subheader is a newly defined Subheader containing the Remote UE Index, or is similar to the Subheader including the LCID defined in the MAC PDU on the current uplink and downlink. .
  • the MAC PDU may include: a MAC Header, a MAC CE, and at least one MAC SDU; the at least one MAC SDU may include N MAC SDUs corresponding to the Remote UE;
  • the foregoing MAC CE may include an Index of the Remote UE
  • the N MAC SDUs are in one-to-one correspondence with the N radio bearers of the Remote UE.
  • Each MAC SDU may include data on the radio bearer corresponding to the MAC SDU, that is, the data on each radio bearer of the Remote UE is respectively carried.
  • the MAC SDU In the MAC SDU;
  • the MAC Header may include: at least one MAC Subheader; the at least one MAC Subheader may The third MAC Subheader is included, and the N MAC Subheaders are in one-to-one correspondence with the N radio bearers.
  • the third MAC Subheader may include an LCID indicating that the MAC CE is an index that includes the Remote UE, in the N MAC Subheaders.
  • Each MAC Subheader can contain And configured to identify a radio bearer corresponding to the MAC Subheader, and indicate a MAC SDU corresponding to the radio bearer.
  • the index of the Remote UE and the data on the radio bearer of the Remote UE are respectively carried in the MAC SDU to the base station, and at the same time, in the MAC Subheader.
  • the MAC SDU including the index of the Remote UE and the MAC SDU including the data of the Remote UE are indicated by the MAC Subheader including the LCID in the plurality of MAC Subheaders.
  • the Relay UE receives the data 1, data 2 sent by the Remote UE1, the data 1, the data 2 sent by the Remote UE2, and the data 1 and data 2 sent by the Relay UE for the Remote UE1 are respectively established.
  • Radio Bearer The radio bearer with the LCID configured as the LCID1 and the radio bearer with the LCID1 configured as the LCID2, and the radio bearer for the data and data 2 sent by the Remote UE2: the radio bearer with the LCID1 configured as the LCID1
  • the logical channel identifier LCID is configured as the radio bearer of the LCID2
  • the Relay UE fills the index of the Remote UE1 into the MAC CE1, and fills the data 1 and data 2 sent by the Remote UE1 into the MAC SDU1 and the MAC SDU2, respectively, and the Remote UE2
  • the index is filled in the MAC CE2, and the data 1 and the data 2 sent by the Remote UE2 are respectively filled into the MAC SDU3 and the MAC SDU4, and the MAC Subheader1 in the MAC PDU is filled with the LCID indicating that the MAC CE1 is an index including the Remote UE.
  • LCID1 in the MAC Subheader2 fills the LCID2 in the MAC Subheader3, and fill in the MAC Subheader4 in the MAC PDU to indicate the MAC CE2.
  • Remote UE contains an index of LCID, the MAC Subheader5 filled LCID1, is filled in the MAC Subheader6 LCID2.
  • the MAC SDU filled with the Remote UE Index may include other bits in addition to the Remote UE Index, such as: reserved (R) bit; padding LCID.
  • the MAC Subheader can contain other bits, such as: R, E, F, and F2.
  • the MAC PDU may further include: blank padding, MAC
  • the Header may also include a MAC Subheader corresponding to the MAC CE and a Padding Subheader corresponding to the Padding, which is not limited in this embodiment of the present invention.
  • the LCID and the Uplink Shared Channel (UL-SCH) used in the current downlink shared channel (DL-SCH) may be used.
  • the LCID value of the used LCID is taken as the LCID value indicating the MAC CE including the Remote UE Index.
  • the MAC CE including the Remote UE Index may be indicated by 10111;
  • the indication of the other values of the LCID is still the same as the existing one, and the details are not repeated here.
  • the MAC CE including the Remote UE Index may be indicated by 10101; and the indication of the other values of the LCID is still the same as the existing one, and the details are not repeated herein.
  • the scheme (1.4) carries the data of the Remote UE, the LCID of each radio bearer carrying the data of the Remote UE, and the Index of the Remote UE in the MAC PDU, and sends the data to the base station;
  • the MAC PDU may include: a MAC Header and N MAC SDUs;
  • the N MAC SDUs are in one-to-one correspondence with the N radio bearers, and each MAC SDU may include data on the radio bearer corresponding to the MAC SDU, that is, the data on each radio bearer of the Remote UE is respectively carried in the MAC SDU. Sending to the base station;
  • the MAC Header may include: a MAC Subheader including a bitmap, and one by one with the N MAC SDUs. Corresponding N MAC Subheaders;
  • the MAC subheader includes a bitmap that includes at least one bit corresponding to at least one remote UE, wherein a bit n of the at least one bit is used to indicate whether the MAC PDU includes the relay.
  • the second identifier of the UE connection is the data of the Remote UE of n, and the n is 0 or an integer greater than or equal to 1.
  • the number of bits in the bitmap depends on the maximum number of Remote UEs that can be connected under the Relay UE. In the scheme (1.4), the number of bits in the bitmap may be, for example, 16 bits, and the nth bit corresponds to the Remote UE whose index is n, and the number “1” indicates that the MAC PDU includes the bit corresponding to the bit.
  • the data of the remote UE indicates that the data of the Remote UE corresponding to the bit is not included in the MAC PDU by using a digit “0”.
  • the bit may also use other values to indicate whether the MAC PDU includes the bit.
  • the data of the remote UE corresponding to the bit is not limited by the present invention.
  • Each MAC Subheader of the N MAC Subheaders includes an LCID, which is used to identify a radio bearer corresponding to the MAC Subheader, and is used to indicate that the corresponding MAC SDU is the data on the radio bearer corresponding to the MAC SDU.
  • LCID which is used to identify a radio bearer corresponding to the MAC Subheader, and is used to indicate that the corresponding MAC SDU is the data on the radio bearer corresponding to the MAC SDU.
  • the data on the plurality of radio bearers of the Remote UE are carried in a plurality of MAC SDUs to the base station, and the MAC Subheader indication in the MAC Subheader is included in the MAC Subheader.
  • the Relay UE receives the data 1, data 2 sent by the Remote UE1, the data 1, the data 2 sent by the Remote UE2, and the data 1 and data 2 sent by the Relay UE for the Remote UE1 are respectively established.
  • Radio Bearer The radio bearer with the LCID configured as the LCID1 and the radio bearer with the LCID1 configured as the LCID2, and the radio bearer for the data and data 2 sent by the Remote UE2: the radio bearer with the LCID1 configured as the LCID1 Logical
  • the channel identifier LCID is configured as the radio bearer of the LCID2, and the Relay UE fills the received data 1 and 2 of the received Remote UE1 into the MAC SDU1 and the MAC SDU2, respectively, and receives the received data 1 and 2 of the Remote UE2.
  • the MAC SDU3 and the MAC SDU4 are respectively filled in, and the positions corresponding to the Remote UE1 and the Remote UE2 in the bitmap in the MAC Subheader1 are respectively filled with 1, the other parts are filled with 0, the MAC Subheader2 is filled with LCID1, and the MAC Subheader3 is filled with the MAC Subheader3.
  • LCID2 which fills LCID1 in MAC Subheader4 and LCID2 in MAC Subheader5.
  • the MAC Subheader that fills the LCID may include other bits, such as R, E, F, and F2, in addition to the LCID, where Rbit is taken.
  • the value may be used to indicate whether the MAC SDU indicated by the LCID in the MAC Subheader and the MAC SDU indicated by the LCID in the next MAC Subheader adjacent to the MAC Subheader contain data of the same Remote UE.
  • the MAC PDU may further include: a MAC CE, and a padding.
  • the MAC Header may further include a MAC Subheader corresponding to the MAC CE, and a Padding Subheader corresponding to the Padding, which is not performed by the embodiment of the present invention. limited.
  • the scheme (1.5) carries the data of the Remote UE, the LCID of each radio bearer carrying the data of the Remote UE, and the Index of the Remote UE in the MAC PDU, and sends the data to the base station;
  • the MAC PDU may include: a MAC Header, a MAC CE, and at least one MAC SDU;
  • the MAC CE may include a bitmap, and the at least one MAC SDU may include N MAC SDUs corresponding to the N radio bearers, where each MAC SDU is used to carry data of the radio bearer corresponding to the MAC SDU;
  • the bitmap in the MAC CE includes at least one bit corresponding to at least one Remote UE, and the bit n of the at least one bit is used to indicate whether the MAC PDU includes a second connection with the Relay UE.
  • the number of bits in the bit depends on the maximum number of Remote UEs that can be connected under the Relay UE. In the scheme (1.5), the number of bits in the bitmap may be, for example, 16 bits, and the nth bit corresponds to the Remote UE whose index is n, and the number “1” indicates that the MAC PDU includes the bit corresponding to the bit.
  • the data of the remote UE indicates that the data of the Remote UE corresponding to the bit is not included in the MAC PDU by using a digit “0”.
  • the bit may also use other values to indicate whether the MAC PDU includes the bit.
  • the data of the remote UE corresponding to the bit is not limited by the present invention.
  • the MAC header may include: a fourth MAC Subheader including an LCID, and the LCID included in the fourth MAC Subheader is used for Indicates a MAC CE including a bitmap; and N MAC Subheaders corresponding to the N MAC SDUs, each of the N MAC Subheaders includes a radio bearer corresponding to the MAC Subheader, and is used to indicate inclusion The LCID of the MAC SDU of the data on the radio bearer corresponding to the MAC Subheader.
  • the MAC CE including the bitmap indicates which Remote UE data is carried in the MAC PDU, and the data on the plurality of radio bearers of the Remote UE are respectively carried in multiple MACs.
  • the SDU is sent to the base station, and at the same time, the MAC SDU carrying the bitmap and the data is indicated by the MAC Subheader including the LCID.
  • the Relay UE receives the data 1, data 2 sent by the Remote UE1, the data 1, the data 2 sent by the Remote UE2, and the data 1 and data 2 sent by the Relay UE for the Remote UE1 are respectively established.
  • Radio Bearer The radio bearer with the LCID configured as the LCID1 and the radio bearer with the LCID1 configured as the LCID2, and the radio bearer for the data and data 2 sent by the Remote UE2: the radio bearer with the LCID1 configured as the LCID1
  • the logical channel identifier LCID is configured as the radio bearer of the LCID2
  • the location of the relay UE corresponding to the Remote UE1 and the Remote UE2 in the bitmap in the MAC CE1 is respectively Filling 1 and filling the other part with 0, and filling the received data 1 and 2 of the received Remote UE1 into the MAC SDU1 and the MAC SDU2, respectively, and filling the received data 1 and 2 of the Remote UE2 into the MAC SDU3.
  • the MAC Subheader1 is filled with the LCID for identifying the MAC CE containing the bitmap
  • the MAC Subheader2 is filled with LCID1
  • the MAC Subheader3 is filled with LCID2
  • the MAC Subheader4 is filled with LCID1
  • the MAC Subheader5 is filled with LCID2.
  • the MAC PDU may further include: padding, and the MAC header may further include a MAC Subheader corresponding to the MAC CE, and corresponding to Padding.
  • the Padding Subheader is not limited in this embodiment of the present invention.
  • an LCID value is newly defined in the uplink and downlink transport channels in the scheme (1.5) to indicate the MAC CE including the Remote UE Index.
  • the Relay UE can send the data of the Remote UE to the base station through the foregoing schemes (1.1) to (1.5).
  • the data of the UE and the UE may also be referred to by the foregoing method.
  • the identifier of the radio bearer and the index of the UE are sent to the Relay UE together, so that the Relay UE determines, according to the received data of the UE, the identifier of the radio bearer of the UE, and the index of the UE, to which UE (either itself or Connected Remote UE).
  • the base station sends data of at least one Remote UE to the Relay UE, and the Relay UE sends the received data to the at least one Remote UE as an example, and describes a scheme for the base station to send data to the Relay UE.
  • the solution can include the following steps:
  • the configuration parameter of each of the at least one first radio bearer includes: an identifier of the first radio bearer and/or a logical channel identifier LCID corresponding to the first radio bearer.
  • the base station acquires data of the Remote UE.
  • the base station may obtain data of the Remote UE from the core network.
  • the base station determines an index of the Remote UE.
  • the Remote UE may be any Remote UE connected to the Relay UE, and the index base station of each Remote UE in at least one Remote UE is also known.
  • the base station may determine the index of the Remote UE according to the C-RNTI of the Remote UE and the mapping relationship between the index of the Remote UE and the C-RNTI of the Remote UE.
  • the base station determines the index of the Remote UE, reference may be made to the scheme shown in FIG. 6 or FIG. 7 described later.
  • the base station sends the data of the Remote UE to the Relay UE by using the radio bearer of the Remote UE, and sends the data to the Relay UE together with the data, the LCID of the radio bearer, and the index of the Remote UE.
  • the radio bearer of the Remote UE may be the first radio bearer that sends the data of the Remote UE determined by the Relay UE in the scheme shown in FIG. 3a.
  • the base station when the base station sends the data of the Remote UE to the Relay UE, the data of the Relay UE itself may be sent, which is not limited in this embodiment of the present invention, that is, the present invention may adopt the scheme shown in FIG. 5 to the base station.
  • the data of multiple Remote UEs or Relay UEs is sent at the same time, but when the data of the Relay UE is sent, the index of the Relay UE may not be carried.
  • the base station may send the data of the Remote UE, the LCID of each radio bearer of the Remote UE, and the Index of the Remote UE to the Relay UE by using the foregoing schemes (2.1) to (2.5):
  • the Index of the Remote UE or the Relay UE for which the scheduling information is directed is added to the DCI (for example, DCI format 1A) that schedules the downlink data.
  • the Relay UE can determine whether the received downlink data is data sent to itself or data of one of the Remote UEs.
  • the index is included in the downlink control information sent to the relay UE, that is, the relay UE will follow the DCI when decoding the DCI.
  • the DCI includes the number of bits and the format after the Index to decode the DCI.
  • the Relay UE decodes the DCI according to the number of bits and format included in the current DCI.
  • the index is included in the DCI, and may be set to, for example, 0000 (assuming that the index is represented by 4 bits).
  • the base station can carry the data of the remote UE and the LCID of the radio bearer in which the data of the remote UE is located, and the base station can avoid the prior art by repeating the use of the LCID.
  • the LCID value is limited.
  • the data of the Remote UE with the same LCID is distinguished by the index of the Remote UE.
  • the Relay UE and the base station may determine the index of the Remote UE by using the manner shown in FIG. 6 or FIG. 7 or FIG. 8 , as shown in FIG. 6 , the manner may include the following step:
  • the Remote UE reports its Layer 2 ID to the base station.
  • the base station After receiving the Layer 2 ID of the Remote UE, the base station establishes a mapping relationship between the Layer 2 ID of the Remote UE and the Cell Radio Network Temporary Identifier (C-RNTI) of the Remote UE.
  • C-RNTI Cell Radio Network Temporary Identifier
  • the Cell Radio Network Temporary Identifier (C-RNTI) of the Remote UE is a unique identifier of the Remote UE in its serving cell.
  • the Remote UE After the Remote UE finds and finally selects a Relay UE, the Remote UE sends a connection establishment request to the Relay UE, where the connection establishment request is used to request the Relay UE to establish a connection with the Remote UE, where the connection establishment request includes the Remote UE. Layer 2ID.
  • the Relay UE receives the connection establishment request sent by the Remote UE, and sends a notification message to the base station, where the notification message is used to notify the base station that the Remote UE needs to establish a connection with the D2D communication with itself, and the notification message includes the Layer 2 ID of the Remote UE.
  • the base station receives the notification message sent by the Relay UE, allocates an index (Index) to the Remote UE, and returns a response message including the index of the Remote UE and the mapping relationship between the index and the Layer 2 ID of the Remote UE to the Relay UE.
  • the response message is used to notify the Relay UE to provide a connection for the Remote UE.
  • the base station establishes a mapping relationship between the index of the Remote UE and the C-RNTI of the Remote UE.
  • the Relay UE receives the notification message sent by the base station, and returns a connection establishment response to the Remote UE, where the connection establishment response is used to notify the Remote UE to establish a connection with the remote UE.
  • the Relay UE may return a connection establishment response to the Remote UE before receiving the notification message sent by the base station.
  • the method may include the following steps:
  • the steps 20111 are the same as the step 1011 in FIG. 5, and the step 2012 is the same as the step 1012 in FIG. 5, and the step 2013 is the same as the step 1013 in FIG. 5, and the details are not repeated here.
  • the Relay UE receives the connection establishment request sent by the Remote UE, allocates an Index to the Remote UE according to the Layer 2 ID of the received Remote UE, and sends a notification message to the base station, where the notification message is used to notify the base station that the Remote UE needs to be with the UE.
  • the notification message includes an index allocated by the Relay UE for the Remote UE and a mapping relationship between the Layer 2 ID and the Index of the Remote UE.
  • the base station receives the notification message sent by the Relay UE, and returns a response message to the Relay UE for notifying the Relay UE to provide a connection for the Remote UE, and The station establishes a mapping relationship between the index of the Remote UE and the C-RNTI of the Remote UE.
  • the base station may establish a mapping relationship between the Layer 2 ID of the Remote UE and the C-RNTI of the Remote UE in the step 2012, and the mapping relationship between the Layer 2 ID of the Remote UE and the Index of the Remote UE included in the notification message.
  • the index of the UE is mapped to the C-RNTI of the Remote UE.
  • the Relay UE receives the notification message sent by the base station, and returns a connection establishment response to the Remote UE, where the connection establishment response is used to notify the Remote UE to establish a connection with the connection.
  • the method may include the following steps:
  • the Remote UE After the Remote UE finds and finally selects a Relay UE, the Remote UE sends a connection establishment request for device-to-device communication to the Relay UE, where the connection establishment request is used to request the Relay UE to establish a connection with the Remote UE, where the connection establishment request includes Remote UE's own Layer 2 ID.
  • the notification UE sends a notification message to the base station, and the notification message is used to notify the base station that the remote UE needs to establish a D2D communication connection with the self.
  • the notification message includes a Remote UE. Layer 2 ID.
  • the base station receives the notification message sent by the Relay UE, allocates an index (Index) to the Remote UE, and returns a response message including the index of the Remote UE and the mapping relationship between the index and the Layer 2 ID of the Remote UE to the Relay UE.
  • the response message is used to notify the Relay UE to provide a connection for the Remote UE.
  • the Relay UE receives the notification message sent by the base station, and returns a connection establishment response of the device to the inter-device communication to the Remote UE, where the connection establishment response is used to notify the Remote UE to establish a connection with the UE.
  • the Relay UE may return the connection establishment response to the Remote UE before receiving the notification message sent by the base station.
  • the base station receives a Radio Resource Control (RRC) connection establishment request message of the Remote UE.
  • the RRC Connection Setup Request message is forwarded to the base station by the Relay UE.
  • the data including the RRC connection setup request message forwarded by the Relay UE includes the Remote obtained by the Relay UE in step 1013.
  • the RRC connection setup request message includes a UE identifier of the Remote UE, for example, an S-TMSI (English SAE Temporary Mobile Station Identifier).
  • the base station establishes a mapping relationship between the index of the Remote UE and the S-TMSI of the Remote UE, or the base station allocates a C-RNTI to the Remote UE, and establishes a mapping relationship between the Index of the Remote UE and the C-RNTI of the Remote UE.
  • the resource request method provided by the embodiment of the present invention is mainly introduced in the perspective of the interaction between the remote UE, the relay UE, and the base station.
  • the Remote UE, the Relay UE, and the base station include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above functions.
  • the present invention can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.
  • the embodiments of the present invention may divide the functional modules of the Remote UE, the Relay UE, and the base station according to the foregoing method examples, and the following, for example, each functional module may be divided according to each function, or two or more functions may be used.
  • Integrated in a processing module Integrated in a processing module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present invention is schematic, and is only a logical function division, and the actual implementation may have another division manner.
  • FIG. 9 is a schematic structural diagram of a base station involved in the embodiment of the present invention.
  • the base station 10 can be used to implement the foregoing FIG.
  • the method performed by the base station in the method embodiment, the base station 20 may include: a sending unit 101, a receiving unit 102, and a determining unit 103.
  • the sending unit 101 is configured to support the base station 10 to perform the operations of step 301 and step 304 in FIG. 102 is used to support the base station 10 to perform the action of step 302 in FIG. 5.
  • the determining unit 103 is configured to support the base station 10 to perform the action of step 303 in FIG.
  • the determining unit 103 shown in FIG. 9 can be integrated in the processor 1012 shown in FIG. 2, so that the processor 1012 performs the specific function of the determining unit 103, and the sending unit 101,
  • the receiving unit 102 can be integrated in the communication interface 1011 shown in FIG. 2, so that the communication interface 1011 performs the specific functions of the transmitting unit 101 and the receiving unit 102.
  • FIG. 10 is a schematic diagram of a possible structure of a Relay UE according to an embodiment of the present invention.
  • the Relay UE 20 may be used to implement the foregoing FIG. 3 or The method performed by the Relay UE in the method embodiment shown in FIG. 3a, the relay UE 20 may include: a receiving unit 201, a determining unit 202, and a sending unit 203, where the receiving unit 201 is configured to support the relay UE20 to perform the actions of step 201 and step 201.
  • the determining unit 202 is configured to support the relay UE 20 to perform the operations of step 202, step 203, and steps 203-205 in FIG. 3 and FIG. 3a
  • the sending unit 203 is configured to support the relay UE 20 to perform step 104 and step 206 in FIG. 3 and FIG. 3a. action.
  • the determining unit 202 shown in FIG. 10 can be integrated into the processor 2012 shown in FIG. 2, so that the processor 2012 performs the specific function of the determining unit 202, and the receiving unit 201,
  • the transmitting unit 203 can be integrated in the communication interface 2011 shown in FIG. 2, so that the communication interface 2011 performs the specific functions of the receiving unit 201 and the transmitting unit 203.
  • the embodiment of the present invention further provides a data transmission system, where the data transmission system may include: the Remote UE 30, the Relay UE 20, and the base station 10 according to any of the foregoing embodiments.
  • the data transmission system provided by the embodiment of the present invention implements the data transmission method shown in FIG. 3 or FIG. 3a or FIG. 5 above. Therefore, the same beneficial effects as the above data transmission method can be achieved, and details are not repeatedly described herein.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical or otherwise.
  • 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, may be located in one place, or may be distributed to multiple network devices. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each functional unit may exist independently, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the software functional units described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform portions of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: Universal Serial Bus (USB) flash drive (English: USB flash drive), mobile hard disk, read-only memory (English: read-only memory, ROM), random access

Abstract

本发明提供一种数据传输方法、设备及系统，涉及通信技术领域，以解决基站无法很好的区分出Relay UE发送的数据为哪个Remote UE的数据的问题。该方法可以包括：Relay UE接收Remote UE的数据；所述数据包含所述Remote UE的第一标识，Relay UE根据所述第一标识，确定所述Remote UE的第二标识，向基站发送所述Remote UE的数据、以及所述Remote UE的第二标识。

Description

一种数据传输方法、设备及系统 技术领域
本发明涉及通信技术领域，尤其涉及一种数据传输方法、设备及系统。
背景技术
目前，在设备到设备(英文：Device-to-Device，D2D)通信方式中，一种比较特殊的方式是一个用户设备(英文：User Equipment，UE)通过另外一个具备中继功能的UE与网络进行连接，一般将前者称为远端用户设备(英文：Remote UE)，将后者称为中继用户设备(英文：Relay UE)，将Remote UE和Relay UE间的通信链路称为侧行链路(Sidelink)。
在长期演进(英文：Long Term Evolution，LTE)的协议标准13(英文：Release 13，Rel-13)中，对基于层三的Relay而言，一个主要的问题是基站收到来自Relay UE的数据后，无法区分该数据是来自Relay UE自己的数据，还是来自该Relay UE服务的某一个Remote UE的数据。为解决这个问题，目前3GPP开始研究基于层二的Relay。对于基于Relay UE的通信中，Relay UE需要同时为多个Remote UE提供接入。针对这种情况，基站和Relay UE处如何区分数据是来自/传给哪个UE的(Relay UE或者Relay UE连接的某个remote UE的)，一种技术方案是：在Relay UE处为每个Remote UE的每个数据流配置一个独立的无线承载(英文：Radio Bearer，RB)，使每个数据流采用独立的无线承载传输至基站，并且每个无线承载具有一个唯一的逻辑信道标识(英文：Logical Channel ID，LCID)，以便基站根据LCID区分接收到的数据来自哪个UE。
但是，目前的LCID只有5bit，其取值是有限的，即仅存在0～32个取值，并且其中一些值已经用于指示其他信息，如：媒体接入控制控制单元(英文：Medium Access Control Control Element，MAC  CE)的类型，当Relay UE提供服务的Remote UE数目较多，或者每个Remote UE的数据流较多时，目前有限的LCID值无法支持Relay UE为每个Remote UE的每个数据流独立配置一个具有唯一标识的无线承载，这严重影响了Remote UE的数据的正常传输，仍旧不能很好地解决基站/Relay UE处如何区分数据是来自/传给哪个UE的(Relay UE或者Relay UE连接的某个remote UE的)。
发明内容
本申请提供一种数据传输方法、设备及系统，以解决在基站处如何区分接收到的Relay UE发送的数据是来自哪个UE(Relay UE或者与Relay UE连接的某个Remote UE)的数据，以及解决在Relay UE处如何区分自身接收到的基站发送的数据是传给哪个UE(Relay UE或者与Relay UE连接的某个Remote UE)的问题。
为达到上述目的，本申请采用如下技术方案：
第一方面，提供一种数据传输方法，该方法由Relay UE执行，可以包括：
接收Remote UE发送的包含Remote UE的第一标识的数据，根据接收到的Remote UE的第一标识，确定Remote UE在该Relay UE下的唯一标识，即第二标识，连同确定出的Remote UE的第一标识向基站发送Remote UE的数据。
其中，第一标识可以为Remote UE的层2地址，如源MAC地址或者用于LTE系统中设备到设备间通信的用户设备标识。
如此，在Relay UE向基站发送数据的同时，将Remote UE的第二标识也发送至基站，以便基站根据接收到的Remote UE的第二标识识别出接收到的数据为Relay UE下哪个Remote UE发送的数据。
可选的，在Relay UE向基站发送Remote UE的数据时，可以将Remote UE的数据承载在Relay UE为Remote UE创建的无线承载上发送至基站，具体的，在第一方面的一种可实现方式中，结合第一方面，该方法还可以包括：
Relay UE接收网络设备发送的含用于传输与Relay UE连接的Remote UE的数据的至少一个第一无线承载的配置参数，至少一个第一无线承载中每个第一无线承载的配置参数包括：第一无线承载的标识，或者第一无线承载对应的逻辑信道标识LCID；并根据至少一个第一无线承载的配置参数，为Remote UE建立至少一个第一无线承载。
Relay UE确定Remote UE的数据对应的第一无线承载；
Relay UE通过与数据相对应的第一无线承载向基站发送数据，与该数据一起发送的还有Remote UE的第二标识、以及与数据对应的第一无线承载的LCID。
需要说明的是，在Relay UE确定Remote UE的数据对应的第一无线承载的过程中，对于同一Remote UE而言，可以为同属于一个数据流的数据配置一个第一无线承载，也可以将属于不同数据流的数据配置一个第一无线承载，本发明实施例对此不进行限定，但同一Remote UE对应的第一无线承载的标识或者LCID是唯一的，而不同Remote UE间第一无线承载的标识或者LCID可以是相同，即无线承载的标识或者LCID可以重复标识不同Remote UE的无线承载。
如此，在Relay UE向基站发送数据的同时，可以将Remote UE的第二标识、以及该Remote UE的数据对应的无线承载的标识或者LCID也发送至基站，以便基站根据接收到的Remote UE的第二标识、以及无线承载的标识或者LCID识别出接收到的数据为Relay UE下哪个Remote UE的哪个无线承载上发送的数据。此外，上述可实现方式中不同Remote UE可以重复使用无线承载的标识或者LCID，以此避免了现有无线承载标识或者LCID有限的问题。
可选的，在第一方面的第二种可实现方式中，结合第一方面或者第一方面的可实现方式，上述Relay UE确定Remote UE的数据对应的第一无线承载可以包括：
Relay UE接收Remote UE通过至少一个第二无线承载发送的携 带有每个第二无线承载的标识或者每个第二无线承载的LCID的数据，根据每个第二无线承载的标识，或者每个第二无线承载的LCID，确定Remote UE的数据对应的第一无线承载。
如此，Relay UE可以根据Remote UE与Relay UE之间传输数据的无线承载确定出Relay UE与基站间的无线承载。
可选的，在第一方面的又一种可实现方式中，结合第一方面或者第一方面的可实现方式，Relay UE可以将Remote UE的第二标识、与数据对应的第一无线承载的LCID以及数据携带在媒体接入控制协议数据单元MAC PDU中向基站发送。
具体的，可以将Remote UE的第二标识携带在MAC PDU中的第一MAC subheader或者一个MAC CE中，与数据对应的第一无线承载的LCID携带在MAC PDU中的第二MAC subheader中，数据携带在MAC PDU中的一个MAC SDU中向基站发送。
如图4a所示，将Remote UE的第二标识包含在第一MAC subheader中，与数据对应的第一无线承载的LCID携带在MAC PDU中的第二MAC subheader中，数据携带在MAC PDU中的一个MAC SDU中向基站发送，其中，第二MAC subheader还可以用于指示MAC PDU中包含Remote UE的数据。
或者，如图4b所示，第一MAC subheader包含比特图bitmap，bitmap包含至少一个比特位，其中，至少一个比特位中的比特位n用于指示MAC PDU中是否包含与Relay UE连接的第二标识为n的Remote UE的数据，n为0或者大于等于1的整数，即若Remote UE的第二标识为n，则比特位n可以填充用于指示该MAC PDU中包含该Remote UE的数据数值，以此将Remote UE的第二标识与bitmap中的比特位关联起来；与数据对应的第一无线承载的LCID携带在MAC PDU中的第二MAC subheader中，数据携带在MAC PDU中的一个MAC SDU中向基站发送，其中，第二MAC subheader还可以用于指示MAC PDU中包含Remote UE的数据。
或者，如图4c所示，MAC CE包含Remote UE的第二标识，与 数据对应的第一无线承载的LCID携带在MAC PDU中的第二MAC subheader中，数据携带在MAC PDU中的一个MAC SDU中向基站发送；相对应的，MAC PDU还可以包含第三MAC Subheader，第三Subheader包含用于指示MAC CE为包含Remote UE的第二标识的LCID。
或者，如图4b所示，MAC CE包含bitmap，bitmap包含至少一个比特位，其中，至少一个比特位中的比特位n用于指示MAC PDU中是否包含与Relay UE连接的第二标识为n的Remote UE的数据，n为0或者大于等于1的整数，以此将Remote UE的第二标识与bitmap中的比特位关联起来；与数据对应的第一无线承载的LCID携带在MAC PDU中的第二MAC subheader中，数据携带在MAC PDU中的一个MAC SDU中向基站发送，其中，MAC PDU还可以包含第四MAC Subheader，第四MAC Subheader包含用于指示MAC CE为包含bitmap的MAC CE。
如此，Relay UE可以通过如图4a～图4b所示的方法将Remote UE的第二标识、与数据对应的第一无线承载的LCID以及数据携带在媒体接入控制协议数据单元MAC PDU中向基站发送。
可选的，在第一方面的再一种可实现方式中，结合第一方面或者第一方面的可实现方式，该方法还可以包括：
当基站调度Remote UE/Relay UE的上行数据时，在调度上行数据的下行控制信息(英文：Downlink Control Information，DCI)(例如，DCI format 0)中加入调度信息所针对的Remote UE或者Relay UE的第二标识；根据该第二标识，Relay UE可以确定出所述下行控制信息中分配的上行资源是用于发送自己的数据还是其中某个Remote UE的数据。例如，可以根据DCI中Remote UE的第二标识，在该DCI指示的资源上发送Remote UE的数据。
需要说明的是，只有当基站配置某个Relay UE开始为Remote UE提供数据转发服务后，在发送给该Relay UE的下行控制信息中才会包含所述第二标识，即Relay UE在解码DCI时会按照DCI中 包含所述第二标识后的比特数和格式来解码DCI。否则，Relay UE按照目前的DCI中包含的比特数和格式来解码DCI。当基站发送的一个DCI为调度Relay UE自己的上行数据传输时，在DCI中包含第二标识，例如可以设为0000(假设Index用4bit表示)。
如此，Relay UE可以根据基站下发的DCI中所指示的与Remote UE对应的资源向基站发送数据，以使基站根据资源位置确定出接收到的数据为哪个Remote UE发送的数据。
可选的，在第一方面的再一种可实现方式中，结合第一方面或者第一方面的任一可实现方式，Relay UE可以采用下述方式一或者方式二根据第一标识确定Remote UE的第二标识：
方式一：Relay UE接收Remote UE发送的用于请求Relay UE与Remote UE建立连接、且包含Remote UE的第一标识连接建立请求，向基站发送包含Remote UE的第一标识的通知消息；
接收基站返回的包含由基站确定的Remote UE的第二标识与第一标识映射关系的响应消息，根据响应消息确定Remote UE的第二标识以及第二标识与第一标识的映射关系；
根据Remote UE的第二标识以及第二标识与第一标识的映射关系确定Remote UE的第二标识。
方式二：Relay UE接收Remote UE发送的用于请求Relay UE与Remote UE建立连接、且包含Remote UE的第一标识的连接建立请求，确定Remote UE的第二标识，并将Remote UE的第二标识与Remote UE的第一标识建立映射关系；
相应的，在方式二中，该方法还可以包括：
Relay UE向基站包含Remote UE的第二标识和/或第二标识与第一标识的映射关系，以便基站根据接收到的信息确定Remote UE的第二标识。
如此，Relay UE可以根据上述方式一或者方式二确定出Remote UE的第二标识。
相对应的，作为Relay UE向基站发送数据的逆过程，在基站向 Relay UE发送多个UE(Remote UE或Relay UE)的数据时，也可以参照上述方法，将该UE的数据、该UE的无线承载的标识、以及该UE的第二标识一起发送至Relay UE，以便Relay UE根据接收的UE的数据、该UE的无线承载的标识、以及该UE的第二标识确定将数据传给哪个UE(自身或者与其连接的Remote UE)，具体实现如下第二方面所述。
第二方面，提供一种数据传输方法，由基站执行，该方法可以包括：
向Relay UE发送用于建立用于传输在所述基站和Relay UE间传输与RelayUE连接的Remote UE的数据的至少一个第一无线承载、且包含至少一个第一无线承载的配置参数的第一消息，获取Remote UE的数据，确定Remote UE的第二标识。
基站确定与Remote UE的数据对应的第一无线承载，通过该第一无线承载向Relay UE发送该Remote UE的数据，与该数据一起发送的还有第一无线承载的LCID、以及该Remote UE的第二标识。
其中，至少一个第一无线承载中每个第一无线承载的配置参数可以包括第一无线承载的标识和/或第一无线承载对应的逻辑信道标识LCID。
需要说明的是，在基站为Remote UE创建第一无线承载的过程中，对于同一Remote UE而言，可以为同属于一个数据流的数据配置一个第一无线承载，也可以将属于不同数据流的数据配置一个第一无线承载，本发明实施例对此不进行限定，但同一Remote UE对应的第一无线承载的标识或者LCID是唯一的，而不同Remote UE间第一无线承载的标识或者LCID可以是相同，即无线承载的标识或者LCID可以重复标识不同Remote UE的无线承载。
如此，基站在向Relay UE发送多个Remote UE的数据的同时可以携带上Remote UE的第二标识、以及该Remote UE的数据所处的无线承载的LCID，通过发送Remote UE的第二标识、以及无线承载的标识或者LCID来区分哪个无线承载上的数据为哪个UE的数 据。
可选的，在第二方面的一种可实现方式中，结合第二方面，基站也可以通过如图4a～图4b所示的方案将Remote UE的数据、Remote UE的每个无线承载的标识或者LCID、以及Remote UE的第二标识发送至Relay UE，在此不再重复赘述。
可选的，在第二方面的又一种可实现方式中，结合第二方面或者第二方面的可实现方式，该方法还可以包括：
基站调度Remote UE/Relay UE的下行数据时，在调度下行数据的DCI(例如，DCI format 1A)中加入该调度信息所针对的Remote UE或者Relay UE的第二标识，根据该第二标识，Relay UE可以确定出所收到的下行数据是发送给自己的数据还是其中某个Remote UE的数据。
需要说明的是，只有当基站配置某个Relay UE开始为Remote UE提供数据转发服务后，在发送给该Relay UE的下行控制信息中才会包含所述第二标识，即Relay UE在解码DCI时会按照DCI中包含所述第二标识后的比特数和格式来解码DCI。否则，Relay UE按照目前的DCI中包含的比特数和格式来解码DCI。当基站发送的一个DCI为调度Relay UE自己的上行数据传输时，在DCI中包含第二标识，例如可以设为0000(假设Index用4bit表示)。
如此，Relay UE可以根据基站下发的DCI中所指示的与Remote UE对应的资源接收基站发送的数据，以使Relay UE根据资源位置确定出接收到的数据为哪个Remote UE的数据。
可选的，在第二方面的一种可实现方式中，结合第二方面或者第二方面的任一可实现方式，基站可以采用下述方式一或者方式二确定Remote UE的第二标识：
方式一：基站接收Remote UE上报的Remote UE第一标识，将Remote UE的第一标识与Remote UE的C-RNTI建立映射关系；
接收Relay UE发送的包含Remote UE的第一标识的通知消息，为Remote UE分配一个第二标识，并向Relay UE返回包含该Remote  UE的第二标识以及所述第二标识与Remote UE的第一标识之间的映射关系的响应消息。
方式二：基站接收Remote UE上报的Remote UE第一标识，将Remote UE的第一标识与Remote UE的C-RNTI建立映射关系；
基站接收Relay UE发送的包含Remote UE的第二标识的通知消息，并向Relay UE返回用于通知Relay UE为Remote UE提供连接的响应消息，同时，基站将该Remote UE的第二标识与Remote UE的C-RNTI建立映射关系。
如此，基站可以根据上述方式一或者方式二确定出Remote UE的第二标识。
第三方面，提供一种Relay UE，该Relay UE可以包括：
接收单元，用于接收Remote UE的数据，所述数据包含所述Remote UE的第一标识；
确定单元，用于根据所述接收单元接收到的第一标识，确定所述Remote UE的第二标识，所述第二标识为所述Remote UE在所述Relay UE下的唯一标识；
发送单元，用于向基站发送所述通信接口接收到的Remote UE的数据、以及所述Remote UE的第二标识。
其中，第三方面的具体实现方式可以参考第一方面或第一方面的可能的实现方式提供的数据传输方法中Relay UE的行为功能，在此不再重复赘述。因此，第三方面提供的Relay UE可以达到与第一方面相同的有益效果。
第四方面，提供一种Relay UE，该Relay UE可以包括：
通信接口，用于接收Remote UE的数据，所述数据包含所述Remote UE的第一标识；
处理器，用于根据所述通信接口接收到的第一标识，确定所述Remote UE的第二标识，所述第二标识为所述Remote UE在所述Relay UE下的唯一标识；
所述通信接口，还用于向基站发送所述通信接口接收到的 Remote UE的数据、以及所述Remote UE的第二标识。
其中，第四方面的具体实现方式可以参考第一方面或第一方面的可能的实现方式提供的数据传输方法中Relay UE的行为功能，在此不再重复赘述。因此，第四方面提供的Relay UE可以达到与第一方面相同的有益效果。
第五方面，本发明提供一种存储一个或多个程序的非易失性计算机可读存储介质，该一个或多个程序包括指令，指令当被包括第三方面或第四方面或上述任一种可能的实现方式所述的Relay UE执行时，使Relay UE执行以下事件：
接收Remote UE的包含所述Remote UE的第一标识的数据，根据接收到的第一标识，确定所述Remote UE的第二标识，所述第二标识为所述Remote UE在所述Relay UE下的唯一标识，向基站发送所述通信接口接收到的Remote UE的数据、以及所述Remote UE的第二标识。
其中，第五方面的具体实现方式可以参考第一方面或第一方面的可能的实现方式提供的数据传输方法中Relay UE的行为功能，在此不再重复赘述。因此，第五方面提供的Relay UE可以达到与第一方面相同的有益效果。
第六方面，提供一种基站，该基站可以包括：
发送单元，用于向Relay UE发送用于建立用于传输在所述基站和Relay UE间传输与RelayUE连接的Remote UE的数据的至少一个第一无线承载、且包含至少一个第一无线承载的配置参数的第一消息，
接收单元，用于获取Remote UE的数据；
确定单元，用于确定Remote UE的第二标识，以及确定与Remote UE的数据对应的第一无线承载；
所述发送单元，还用于通过该第一无线承载向Relay UE发送该Remote UE的数据，与该数据一起发送的还有第一无线承载的LCID、以及该Remote UE的第二标识。
其中，第六方面的具体实现方式可以参考第二方面或第二方面的可能的实现方式提供的数据传输方法中基站的行为功能，在此不再重复赘述。因此，第六方面提供的基站可以达到与第二方面相同的有益效果。
第七方面，提供一种基站，该基站可以包括：
通信接口，用于向Relay UE发送用于建立用于传输在所述基站和Relay UE间传输与RelayUE连接的Remote UE的数据的至少一个第一无线承载、且包含至少一个第一无线承载的配置参数的第一消息，
所述通信接口，还用于获取Remote UE的数据；
处理器，用于确定Remote UE的第二标识，以及确定与Remote UE的数据对应的第一无线承载；
所述通信接口，还用于通过该第一无线承载向Relay UE发送该Remote UE的数据，与该数据一起发送的还有第一无线承载的LCID、以及该Remote UE的第二标识。
其中，第七方面的具体实现方式可以参考第二方面或第二方面的可能的实现方式提供的数据传输方法中基站的行为功能，在此不再重复赘述。因此，第七方面提供的基站可以达到与第二方面相同的有益效果。
第五方面，本发明提供一种存储一个或多个程序的非易失性计算机可读存储介质，该一个或多个程序包括指令，指令当被包括第三方面或第四方面或上述任一种可能的实现方式所述的Relay UE执行时，使Relay UE执行以下事件：
向Relay UE发送用于建立用于传输在所述基站和Relay UE间传输与RelayUE连接的Remote UE的数据的至少一个第一无线承载、且包含至少一个第一无线承载的配置参数的第一消息，获取Remote UE的数据，确定Remote UE的第二标识，以及确定与Remote UE的数据对应的第一无线承载，通过该第一无线承载向Relay UE发送该Remote UE的数据，与该数据一起发送的还有第一无线承载 的LCID、以及该Remote UE的第二标识。
其中，第八方面的具体实现方式可以参考第二方面或第二方面的可能的实现方式提供的数据传输方法中基站的行为功能，在此不再重复赘述。因此，第八方面提供的基站可以达到与第二方面相同的有益效果。
第九方面，提供一种数据传输系统，包括Remote UE、如第三方面或第四方面或第五方面或上述任一可实现方式所述的Relay UE、如第六方面或第七方面或第八方面或上述任一可实现方式所述的基站。
其中，第九方面所述的系统用于实现上述第一方面或第二方面所示的数据传输方法，因此，可以达到与上述数据传输方法相同的有益效果，此处不再重复赘述。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的网络架构示意图；
图2为本发明实施例提供的又一种网络架构示意图；
图3为本发明实施例提供的一种数据传输方法的流程图；
图3a为本发明实施例提供的一种数据传输方法的流程图；
图4a为本发明提供的一种MAC PDU的结构示意图；
图4b为本发明提供的一种MAC PDU的结构示意图；
图4c为本发明提供的一种MAC PDU的结构示意图；
图4d为本发明提供的一种MAC PDU的结构示意图；
图5为本发明实施例提供的一种数据传输方法的流程图；
图6为本发明实施例提供的一种确定Remote UE的索引的方法流程图；
图7为本发明实施例提供的一种确定Remote UE的索引的方法流程图；
图8为本发明实施例提供的一种确定Remote UE的索引的方法流程图；
图9为本发明实施例提供的一种基站10的结构图；
图10为本发明实施例提供的一种Relay UE20的结构图；
图11为本发明实施例提供的一种数据传输系统的结构图。
具体实施方式
本发明的原理是：为连接Relay UE的每个Remote UE配置一个标识，且该标识为Remote UE在Relay UE下的唯一标识，在Relay UE将Remote UE的数据转发至基站的同时，将该Remote UE标识一起发送至基站，以便基站根据该Remote UE的标识确定收到的数据为与Relay UE连接的哪个Remote UE的数据；例如：Relay UE可以将接收到的Remote UE1发送的数据以及Remote UE1的标识一起向基站发送。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在本发明的描述中，需要理解的是，术语“第一”、“第二”、“另一”等指示的系统或元件为基于实施例描述的具有一定功能的系统或元件，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的系统或元件必须有此命名，因此不能理解为对本发明的限制。
详细描述本方案之前，为了便于理解本发明所述的技术方案，对本发明中的一些重要名词进行详细解释，需要理解的是，下述名词仅是本发明技术人员为了描述方便进行的命名，并不代表或暗示所指的系统或元件必须有此命名，因此不能理解为对本发明的限制：
图1为本发明实施例提供的网络架构示意图，该网络可以适用 于本实施例提供的数据传输方法。如图1所示，该网络架构可以包括：基站10、该基站10覆盖范围内的Relay UE20、以及与Relay UE20连接的多个Remote UE30；基站10可以是LTE中的演进型基站(英文：Evolutional Node B，eNB或e-NodeB)，本发明并不限定。Relay UE20可以为(英文：User Uniqupment，UE)，用户设备(Terminal)、移动台(英文：Mobile Station，MS)、移动用户设备(Mobile Terminal)、还可以为可穿戴设备的佩戴者的智能移动终端等，本发明并不限定，Relay UE20可以经无线接入网(英文：Radio AccessNetwork，RAN)与基站10进行通信。Remote UE30具有体积小、电池容量小、功耗低的特点，例如：可以为可穿戴设备，其中，可穿戴式设备包括但不限于智能手表、手智能环、智能腕带、智能眼镜、智能项链、智能戒指、智能耳环、智能手机等各类智能的穿戴设备。在实际应用中，Remote UE30可以通过Relay UE20与基站10进行通信，Remote UE30与Relay UE20之间的通信链路可以称为Sidelink，Remote UE30与Relay UE20之间可以基于WLAN、蓝牙技术等通信方式进行通信，也可以基于LTE Sidelink通信技术进行通信，本发明实施例对此不进行限定。需要说明的是，图1仅为示意图，图1中设备的个数对本发明提供的技术方案不构成限定，在实际部署过程中，可以以不同于图2所示的设备的个数进行部署。
具体的，如图2所示，基站10可以包括：通信接口1011、处理器1012、存储器1013以及至少一个通信总线1014，用于实现这些装置之间的连接和相互通信；Relay UE20可以包括：通信接口2011、处理器2012、存储器2013以及至少一个通信总线2014，用于实现这些装置之间的连接和相互通信；Remote UE30可以包括：通信接口3011、处理器3012、存储器3013以及至少一个通信总线3014，用于实现这些装置之间的连接和相互通信。
其中，通信接口1011、通信接口2011、通信接口3011，可以由天线来实现，可用于与外部网元之间进行数据交互，如：基站10的通信接口1011可收发与Relay UE20间的数据包或资源请求信息； Relay UE20的通信接口2011可收发与UE或基站10间或Remote UE30之间的数据包或资源请求信息。例如：通信接口3011可以将Remote UE30的数据以及其他信息发送至通信接口2011，通信接口2011接收到数据或其他信息后，通过Relay UE20与基站间的无线承载将数据或其他信息发送至通信接口1011，交由基站10处理。
处理器1012、处理器2012、处理器3012，可能是一个中央处理器(英文：Central Processing Unit，CPU)，也可以是特定集成电路(英文：Application Specific Integrated Circuit，ASIC)，或者是被配置成实施本发明实施例的一个或多个集成电路。例如：一个或多个微处理器(英文：Digital Singnal Processor，DSP)，或，一个或者多个现场可编程门阵列(英文：Field Programmable Gate Array，FPGA)。处理器1012、处理器2012、处理器3012具有处理管理功能，具体的，处理器1012可以对接收到的Relay UE20发送的数据或信息进行处理，处理器2012可以对接收到的Remote UE30发送的数据或信息进行处理，处理器3012可以对Remote UE30自身产生的数据或信息进行处理、或者对其他设备发送的信息或数据进行处理。
存储器1013、存储器2013、存储器3013，可以是易失性存储器(volatile memory)，例如随机存取存储器(英文：Random-Access Memory，RAM)；或者非易失性存储器(non-volatile memory)。例如只读存储器(英文：Read-Only Memory，ROM)，快闪存储器(flash memory)，硬盘(hard disk drive，HDD)或固态硬盘(英文：Solid-State Drive，SSD)；或者上述种类的存储器的组合。具体的，存储器1013、存储器2013、存储器3013内可以存储支持本发明实施例所述的数据传输方法的数据或程序代码，以便处理器1012、处理器2012、处理器3012根据自身所处设备中存储器内存储的数据或程序代码执行本发明实施例提供的数据传输方法。
通信总线1014、通信总线2014、通信总线3013可以分为地址总线、数据总线、控制总线等，可以是工业标准体系结构(英文：Industry Standard Architecture，ISA)总线、外部设备互连(英文： Peripheral Component，PCI)总线或扩展工业标准体系结构(英文：Extended Industry Standard Architecture，EISA)总线等。为便于表示，图2中仅用一条线表示，但并不表示仅有一根总线或一种类型的总线。
具体的，Relay UE20的通信接口2011可以在接收到Remote UE30的通信接口3011发送的数据包含Remote UE30的第一标识后，Relay UE20的处理器2012根据Remote UE30的第一标识，确定Remote UE30的第二标识，并由通信接口2011同时向基站发送Remote UE30的数据、以及Remote UE30的第二标识。
其中，上述第一标识可以为Remote UE的层2地址(Layer 2ID)；若Remote UE和Relay UE间的通信技术采用的是LTE侧行链路(Sidelink)技术，则该第一标识可以为Remote UE用于设备到设备间通信的用户设备标识，如：可以为Remote UE的服务用户设备标识(ProSe UE ID)；若Remote UE和Relay UE间的通信技术采用的是蓝牙或无线局域网(英文：Wireless Local Area Network，WLAN)技术，则该第一标识可以为Remote UE的源媒体接入控制(英文：Medium Access Control，MAC)地址。
所述第二标识可以称之为Remote UE的索引(Remote UE Index)，或者Remote UE ID，为Remote UE与Relay UE连接时Remote UE的唯一标识，可以用多个比特数来表示。其中，表示Remote UE Index的比特数的多少取决于Relay UE下可以连接的最大的Remote UE的数目。例如：Relay UE最多可连接4个Remote UE，则可以采用2bit来表示Remote UE Index。例如，对于同一Remote UE而言，与Relay UE1连接时的索引可以为：Remote UE Index1，与Relay UE2连接时的索引可以为：Remote UE Index2。
为便于描述，以下实施例以第一标识为Remote UE的Layer 2ID，第二标识为Remote UE的Index为例，示出并详细描述了本发明提供的数据传输方法的过程，其中，示出的步骤也可以在一组可执行指令的计算机系统中执行。此外，虽然在图中示出了逻辑顺序， 但是在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤。
图3为本发明实施例提供的一种数据传输方法的流程图，该方法由图1或图2所示的设备交互执行，该方法可以应用于：Relay UE向基站发送该Relay UE接收到的至少一个Remote UE的数据的场景；如图3所示，该方法可以包括以下步骤：
101：Relay UE接收Remote UE的数据，该数据包含Remote UE的Layer 2ID。
其中，上述Remote UE可以为与Relay UE连接的任一Remote UE，Relay UE可以通过Relay UE与该Remote UE间的Sidelink或者WLAN或者蓝牙链路接收Remote UE发送的数据
102：Relay UE根据Remote UE的Layer 2ID，确定Remote UE的索引。
可选的，Relay UE确定该Remote UE的索引的过程可参照后续图6或图7或图8所示方案。
103：Relay UE向基站发送该Remote UE的数据、以及该Remote UE的索引。
如此，Relay UE可以通过将Remote UE的数据、以及Remote UE的索引一起发送至基站，以便基站根据Remote UE的索引确定出接收到的数据是Relay UE下的哪个Remote UE的数据。
在本发明实施例的又一可行性方案中，在Relay UE向基站发送该Remote UE的数据时，Relay UE可以为Remote UE创建多个无线承载，通过无线承载向基站发送数据，同时，为了避免现有技术中标识无线承载的无线承载标识或者LCID值有限的问题，可以在创建无线承载时，使同一Remote UE的无线承载配置唯一的无线承载标识和/或者LCID，不同Remote UE间的第一无线承载配置相同的无线承载标识和/或者逻辑信道标识，具体的，其实现方式如图3a所示，可以包括以下步骤：
201：Relay UE接收网络设备发送的第一消息，第一消息用于 建立用于传输在所述基站和Relay UE间传输与Relay UE连接的Remote UE的数据的至少一个第一无线承载，所述第一消息中包含所述至少一个第一无线承载的配置参数。
其中，上述网络设备可以为基站，至少一个第一无线承载中每个第一无线承载的配置参数包括：第一无线承载的标识和/或第一无线承载对应的逻辑信道标识LCID。
202：Relay UE根据至少一个第一无线承载的配置参数，为Remote UE建立至少一个第一无线承载。
其中，第一无线承载为在Relay UE与基站之间传输与所述RelayUE连接的Remote UE的数据的无线承载，Relay UE根据第一无线承载的配置参数建立第一无线承载的过程为现有技术，在此不再详细赘述。
步骤203：Relay UE接收Remote UE通过至少一个第二无线承载发送的数据，该数据中携带有：每个第二无线承载的标识和/或每个第二无线承载的LCID、以及Remote UE的Layer 2ID。
204：Relay UE根据Remote UE的Layer 2ID，确定Remote UE的索引。
可选的，Relay UE确定该Remote UE的索引的过程可参照后续图6或图7或图8所示方案。
205：Relay UE确定Remote UE的数据对应的第一无线承载。
可选的，Relay UE可以根据步骤203中接收到的第二无线承载的标识和/或每个第二无线承载的LCID确定Remote UE的数据对应的第一无线承载。
206：Relay UE通过与所述数据相对应的第一无线承载向基站发送所述数据，与所述数据一起发给基站的还包含所述Remote UE的索引、以及与所述数据对应的第一无线承载的LCID。
可选的，对于上述Remote UE而言，在为该Remote UE发送的数据建立第一无线承载的过程中，可以为包含多个数据的每条数据流对应建立一个无线承载，每个无线承载可以对应传输数据流上的 多个数据，且为了解决现有LCID取值有限的问题，不同的Remote UE的无线承载的无线承载标识和/或LCID可以相同，同一Remote UE下的不同无线承载具有不同的无线承载标识和/或LCID。
例如，Remote UE1有三个数据流、Remote UE2有二个数据流，则基站可以为Relay UE配置用于分别传输Remote UE1的三个数据流的数据的三个第一无线承载：其无线承载ID(DRB ID)和关联的逻辑信道ID分别为：DRB ID＝1/LCID＝1的无线承载、DRB ID＝2/LCID＝2的无线承载以及DRB ID/LCID＝3的无线承载，为Relay UE配置用于分别传输Remote UE2的二个数据流的数据的二个第二无线承载，其无线承载ID和关联的逻辑信道ID分别为：DRB ID＝1/LCID＝1的无线承载、以及DRB ID＝2/LCID＝2的无线承载，以此将每个Remote UE发送的数据流通过对应的第一无线承载传输至基站。
需要说明的是，Relay UE在向基站发送接收到的Remote UE的数据的同时，还可以发送自身的数据，本发明实施例对此不进行限定，即本发明可以采用图3a所示的方案向基站同时发送多个UE(Remote UE或者Relay UE)的数据，只不过，不论发送哪个UE(Remote UE或Relay UE)的数据，只需要在发送数据的同时携带上用于用于标识UE的索引以及标识相应无线承载的LCID、即可，以便基站接收到数据之后能够区分是哪个UE通过哪个无线承载发送的数据。
如此，Relay UE在向基站发送多个Remote UE的数据的同时可以携带上Remote UE的索引、以及该Remote UE的数据所对应的无线承载的LCID，通过LCID的重复使用以此避免现有技术中LCID取值有限的问题，同时，通过发送Remote UE的索引来区分具有相同LCID的无线承载上的数据为哪个Remote UE发送的数据。
可选的，在步骤206中，若Remote UE具有N个无线承载，且Relay UE分别通过每个无线承载向基站发送数据，则Relay UE可以通过下述方案(1.1)～(1.5)将Remote UE的数据、Remote UE的 每个无线承载的LCID、以及Remote UE的Index发送至基站，其中，N为大于等于1的整数：
方案(1.1)当基站调度Remote UE/Relay UE的上行数据时，在调度上行数据的下行控制信息(英文：Downlink Control Information，DCI)(例如，DCI format 0)中加入调度信息所针对的Remote UE或者Relay UE的Index。根据该Index，Relay UE可以确定出所述下行控制信息中分配的上行资源是用于发送自己的数据还是其中某个Remote UE的数据。例如，可以根据DCI中Remote UE的索引，在该DCI指示的资源上发送Remote UE的数据。
需要说明的是，只有当基站配置某个Relay UE开始为Remote UE提供数据转发服务后，在发送给该Relay UE的下行控制信息中才会包含所述Index，即Relay UE在解码DCI时会按照DCI中包含所述Index后的比特数和格式来解码DCI。否则，Relay UE按照目前的DCI中包含的比特数和格式来解码DCI。当基站发送的一个DCI为调度Relay UE自己的上行数据传输时，在DCI中包含Index，例如可以设为0000(假设Index用4bit表示)。
方案(1.2)：将Remote UE的数据、承载Remote UE的数据的每个无线承载的LCID、以及Remote UE的Index携带在媒体接入控制协议数据单元(英文：Medium Access Control Protocol Data Unit，MAC PDU)中向基站发送；
其中，该MAC PDU可以包括：媒体接入控制头(MAC Header)、以及多个媒体接入控制服务数据单元(英文：MAC Service Data Unit，MAC SDU)，多个MAC SDU中包含N个与Remote UE的N个无线承载一一对应的MAC SDU，N个MAC SDU中每个MAC SDU内可以包含与该MAC SDU相对应的无线承载上的数据，即将Remote UE的每个无线承载上的数据分别对应携带在MAC SDU中；
MAC Header可以包含多个媒体接入控制子头(MAC Subheader)，该多个MAC Subheader可以包含第一MAC Subheader、以及N个第二MAC Subheader，N个第二MAC Subheader与N个无 线承载一一对应；
第一MAC Subheader可以包含：Remote UE的Index；
N个第二MAC Subheader中的每个第二MAC Subheader可以包含LCID，该第二MAC Subheader包含的LCID用于标识与该第二MAC Subheader对应的无线承载、以及指示与该无线承载对应的MAC SDU。
即由上可知，在方案(1.2)中，将Remote UE对应的多个无线承载上的数据分别携带在多个MAC SDU上发往基站，同时，在MAC Subheader中存在与该Remote UE相对应的包含该Remote UE的索引的MAC Subheader、以及包含无线承载的LCID的MAC Subheader。
例如，如图4a所示，若Relay UE同时接收到的Remote UE1发送的数据1、数据2，Remote UE2发送的数据1、数据2，且Relay UE为Remote UE1发送的数据1、数据2分别建立无线承载：逻辑信道标识LCID配置为LCID1的无线承载、逻辑信道标识LCID配置为LCID2的无线承载，为Remote UE2发送的数据1、数据2分别建立无线承载：逻辑信道标识LCID配置为LCID1的无线承载、逻辑信道标识LCID配置为LCID2的无线承载，则Relay UE将同时接收到的Remote UE1发送的数据1、数据2分别填充到MAC SDU1、MAC SDU2中，以及将Remote UE2发送的数据1、数据2分别填充到MAC SDU3、MAC SDU4中，并在MAC PDU中的MAC Subheader1中填充Remote UE1的索引：Remote UE Index1，在MAC Subheader2中填充LCID1，在MAC Subheader3中填充LCID2，在MAC PDU中的MAC Subheader4中填充Remote UE1的索引：Remote UE Index1，在MAC Subheader5中填充LCID1，在MAC Subheader6中填充LCID2。
需要说明的是，在方案(1.2)中，如图4a所示，填充Remote UE Index的MAC Subheader除包含Remote UE Index之外，还可以包含其他比特，如：Tbit、预留(R)bit，其中，Tbit的取值可以用于指示与该MAC Subheader相邻的下一MAC Subheader是新定义的包含 UE Index的Subheader还是类似于目前上下行链路上的MAC PDU中定义的包含LCID的Subheader；此外，如图4a所示，该MAC PDU还可以包括：媒体接入控制控制单元(英文：MAC Control Element，MAC CE)、以及空白填充(Padding)，MAC Header还可以包括与MAC CE相对应的MAC Subheader、以及与Padding相对应的Padding Subheader，本发明实施例对此不进行限定。
另外，目前在包含LCID的MAC Subheader中有两个预留比特。其中一个预留比特可以用于指示与该MAC Subheader相邻的下一MAC Subheader是新定义的包含Remote UE Index的Subheader，还是类似于目前上下行链路上的MAC PDU中定义的包含LCID的Subheader。
方案(1.3)：将Remote UE的数据、承载Remote UE的数据的每个无线承载的LCID、以及Remote UE的Index携带在MAC PDU中向基站发送；
其中，该MAC PDU可以包括：MAC Header、MAC CE，至少一MAC SDU；该至少一MAC SDU中可以包含与Remote UE相对应的N个MAC SDU；
上述MAC CE可以包含Remote UE的Index；
N个MAC SDU与Remote UE的N个无线承载一一对应，每个MAC SDU内可以包含与该MAC SDU相对应的无线承载上的数据，即将Remote UE的每个无线承载上的数据分别对应携带在MAC SDU中；
为了指示包含Remote UE的索引的第一MAC CE、以及包含Remote UE的无线承载上的数据的第二MAC SDU，相对应的，MAC Header可以包含：至少一个MAC Subheader；该至少一个MAC Subheader中可以包含第三MAC Subheader、以及N个MAC Subheader，N个MAC Subheader与N个无线承载一一对应，第三MAC Subheader可以包含用于指示MAC CE为包含Remote UE的索引的LCID，N个MAC Subheader中每个MAC Subheader可以包含 用于标识与该MAC Subheader对应的无线承载、以及指示与该无线承载对应的MAC SDU。
即由上可知，在方案(1.3)中，对于任意Remote UE而言，将该Remote UE的索引、以及该Remote UE的无线承载上的数据分别携带在MAC SDU发往基站，同时，在MAC Subheader中存在与该Remote UE相对应的多个MAC Subheader，通过多个MAC Subheader中包含LCID的MAC Subheader来指示该包含Remote UE的索引的MAC SDU、以及包含该Remote UE的数据的MAC SDU。
例如，如图4b所示，若Relay UE同时接收到的Remote UE1发送的数据1、数据2，Remote UE2发送的数据1、数据2，且Relay UE为Remote UE1发送的数据1、数据2分别建立无线承载：逻辑信道标识LCID配置为LCID1的无线承载、逻辑信道标识LCID配置为LCID2的无线承载，为Remote UE2发送的数据1、数据2分别建立无线承载：逻辑信道标识LCID配置为LCID1的无线承载、逻辑信道标识LCID配置为LCID2的无线承载，则Relay UE将Remote UE1的索引填充到MAC CE1中，将Remote UE1发送的数据1、数据2分别填充到MAC SDU1、MAC SDU2中，将Remote UE2的索引填充到MAC CE2中，将Remote UE2发送的数据1、数据2分别填充到MAC SDU3、MAC SDU4中，并在MAC PDU中的MAC Subheader1中填充用于指示MAC CE1为包含Remote UE的索引的LCID，在MAC Subheader2中填充LCID1，在MAC Subheader3中填充LCID2，在MAC PDU中的MAC Subheader4中填充用于指示MAC CE2为包含Remote UE的索引的LCID，在MAC Subheader5中填充LCID1，在MAC Subheader6中填充LCID2。
需要说明的是，在方案(1.3)中，如图4b所示，填充Remote UE Index的MAC SDU除包含Remote UE Index之外，还可以包含其他比特，如：预留(R)bit；填充LCID的MAC Subheader除包含LCID之外，还可以包含其他比特，如：R、E、F以及F2。此外，如图4b所示，该MAC PDU还可以包括：空白填充(Padding)，MAC  Header还可以包括与MAC CE相对应的MAC Subheader、以及与Padding相对应的Padding Subheader，本发明实施例对此不进行限定。
可选的，为了支持LCID指示的包含Remote UE Index的MAC CE，可以从目前下行共享信道(英文：Downlink Shared Channel，DL-SCH)所用的LCID和上行共享信道(Uplink Shared Channel，UL-SCH)所用的LCID的预留值中取出一个作为指示包含Remote UE Index的MAC CE的LCID值，例如，在下行共享信道中，如下表1所示，可以用10111来指示包含Remote UE Index的MAC CE；而LCID的其他取值的指示作用仍与现有相同，在此不再重复赘述。在上行共享信道中，如下表2所示，可以用10101来指示包含Remote UE Index的MAC CE；而LCID的其他取值的指示作用仍与现有相同，在此不再重复赘述。
表1
Index LCID values
00000 CCCH
00001-01010 Identity of the logical channel
01011-10110 Reserved
10111 Remote UE Index
11000 Activation/Deactivation(4octets)
11001 SC-MCCH,SC-MTCH(see note)
11010 Long DRX Command
11011 Activation/Deactivation(1octet)
11100 UE Contention Resolution Identity
11101 Timing Advance Command
11110 DRX Command
11111 Padding
表2
Index LCID values
00000 CCCH
00001-01010 Identity of the logical channel
01011 CCCH
01100-10100 Reserved
10101 Remote UE Index
10110 Truncated Sidelink BSR
10111 Sidelink BSR
11000 Dual Connectivity Power Headroom Report
11001 Extended Power Headroom Report
11010 Power Headroom Report
11011 C-RNTI
11100 Truncated BSR
11101 Short BSR
11110 Long BSR
11111 Padding
方案(1.4)将Remote UE的数据、承载Remote UE的数据的每个无线承载的LCID、以及Remote UE的Index携带在MAC PDU中向基站发送；
其中，该MAC PDU可以包括：MAC Header、N个MAC SDU；
N个MAC SDU与N个无线承载一一对应，每个MAC SDU内可以包含与该MAC SDU相对应的无线承载上的数据，即将Remote UE的每个无线承载上的数据分别对应携带在MAC SDU中向基站发送；
为了指示哪些Remote UE有数据、以及包含Remote UE的数据的MAC SDU，在方案(1.4)中，该MAC Header可以包含：包含比特图(bitmap)的MAC Subheader、以及与N个MAC SDU一一 对应的N个MAC Subheader；
其中，MAC Subheader包含的bitmap中包含与至少一个Remote UE一一对应的至少一个比特位，其中，所述至少一个比特位中的比特位n用于指示所述MAC PDU中是否包含与所述Relay UE连接的第二标识为n的Remote UE的数据，所述n为0或者大于等于1的整数。所述bitmap中的bit位的个数取决于Relay UE下可以连接的最大的Remote UE的数目。在方案(1.4)中，bitmap中的比特数例如可以为16bit，第n个bit位对应索引为n的Remote UE，且用数字“1”指示所述MAC PDU中包含与所述比特位对应的Remote UE的数据，用数字“0”指示MAC PDU中不包含与所述比特位对应的Remote UE的数据，此外，bit位还可以采用其他值用于指示所述MAC PDU中是否包含与该比特位对应的Remote UE的数据，本发明对此不进行限定；
N个MAC Subheader中每个MAC Subheader包含LCID，该LCID用于标识与该MAC Subheader相对应的无线承载、且用于指示其所对应的MAC SDU为包含与MAC SDU相对应的无线承载上的数据的MAC SDU。
即由上可知，在方案(1.4)中，将Remote UE多个无线承载上的数据分别一一对应的携带在多个MAC SDU内发往基站，同时，通过MAC Subheader中包含bitmap的MAC Subheader指示该MAC PDU中携带有哪些Remote UE的数据、以及通过包含有LCID的MAC Subheader来标识无线承载、以及携带有无线承载上的数据的MAC SDU。
例如，如图4c所示，若Relay UE同时接收到的Remote UE1发送的数据1、数据2，Remote UE2发送的数据1、数据2，且Relay UE为Remote UE1发送的数据1、数据2分别建立无线承载：逻辑信道标识LCID配置为LCID1的无线承载、逻辑信道标识LCID配置为LCID2的无线承载，为Remote UE2发送的数据1、数据2分别建立无线承载：逻辑信道标识LCID配置为LCID1的无线承载、逻 辑信道标识LCID配置为LCID2的无线承载，则Relay UE将接收到的Remote UE1发送的数据1、数据2分别填充到MAC SDU1、MAC SDU2中，将接收到的Remote UE2发送的数据1、数据2分别填充到MAC SDU3、MAC SDU4中，同时，在MAC Subheader1内的bitmap中与该Remote UE1、Remote UE2对应的位置分别填充1，其他部分填充0，在MAC Subheader2中填充LCID1，在MAC Subheader3中填充LCID2，在MAC Subheader4中填充LCID1，在MAC Subheader5中填充LCID2。
需要说明的是，在方案(1.4)中，如图4c所示，填充LCID的MAC Subheader除包含LCID之外，还可以包含其他比特，如：R、E、F以及F2，其中，Rbit的取值可以用于指示该MAC Subheader中的LCID所指示的MAC SDU与该MAC Subheader相邻的下一MAC Subheader中的LCID所指示的MAC SDU是否包含同一Remote UE的数据。此外，该MAC PDU还可以包括：MAC CE、以及空白填充(Padding)，MAC Header还可以包括与MAC CE相对应的MAC Subheader、以及与Padding相对应的Padding Subheader，本发明实施例对此不进行限定。
方案(1.5)将Remote UE的数据、承载Remote UE的数据的每个无线承载的LCID、以及Remote UE的Index携带在MAC PDU中向基站发送；
其中，该MAC PDU可以包括：MAC Header、MAC CE、至少一个MAC SDU；
该MAC CE可以包含比特图(bitmap)，至少一个MAC SDU中可以包含与N个无线承载一一对应的N个MAC SDU，每个MAC SDU用于携带与该MAC SDU对应的无线承载的数据；
MAC CE中的bitmap包含与至少一个Remote UE一一对应的至少一个比特位，所述至少一个比特位中的比特位n用于指示所述MAC PDU中是否包含与所述Relay UE连接的第二标识为n的Remote UE的数据，所述n为0或者大于等于1的整数，所述bitmap 中的bit位的个数取决于Relay UE下可以连接的最大的Remote UE的数目。在方案(1.5)中，bitmap中的比特数例如可以为16bit，第n个bit位对应索引为n的Remote UE，且用数字“1”指示所述MAC PDU中包含与所述比特位对应的Remote UE的数据，用数字“0”指示MAC PDU中不包含与所述比特位对应的Remote UE的数据，此外，bit位还可以采用其他值用于指示所述MAC PDU中是否包含与该比特位对应的Remote UE的数据，本发明对此不进行限定；
为了指示携带bitmap的MAC CE、以及包含无线承载的数据的MAC SDU，在方案(1.5)中，该MAC Header可以包含：一个包含LCID的第四MAC Subheader，该第四MAC Subheader包含的LCID用于指示包含bitmap的MAC CE；以及，与N个MAC SDU一一对应的N个MAC Subheader，N个MAC Subheader中每个MAC Subheader包含用于标识与该MAC Subheader对应的无线承载、以及用于指示包含与该MAC Subheader对应的无线承载上的数据的MAC SDU的LCID。
即由上可知，在方案(1.5)中，通过包含bitmap的MAC CE指示该MAC PDU中携带有哪些Remote UE的数据，并将Remote UE的多个无线承载上的数据分别对应携带在多个MAC SDU发往基站，同时，通过包含有LCID的MAC Subheader来指示携带有bitmap、以及数据的MAC SDU。
例如，如图4d所示，若Relay UE同时接收到的Remote UE1发送的数据1、数据2，Remote UE2发送的数据1、数据2，且Relay UE为Remote UE1发送的数据1、数据2分别建立无线承载：逻辑信道标识LCID配置为LCID1的无线承载、逻辑信道标识LCID配置为LCID2的无线承载，为Remote UE2发送的数据1、数据2分别建立无线承载：逻辑信道标识LCID配置为LCID1的无线承载、逻辑信道标识LCID配置为LCID2的无线承载，则Relay UE在MAC CE1内的bitmap中与该Remote UE1、Remote UE2对应的位置分别 填充1，其他部分填充0，并将接收到的Remote UE1发送的数据1、数据2分别填充到MAC SDU1、MAC SDU2中，将接收到的Remote UE2发送的数据1、数据2分别填充到MAC SDU3、MAC SDU4中，同时，在MAC Subheader1内填充用于标识包含bitmap的MAC CE的LCID，在MAC Subheader2中填充LCID1，在MAC Subheader3中填充LCID2，在MAC Subheader4中填充LCID1，在MAC Subheader5中填充LCID2。
需要说明的是，在方案(1.5)中，如图4d所示，该MAC PDU还可以包括：空白填充(Padding)，MAC Header还可以包括与MAC CE相对应的MAC Subheader、以及与Padding相对应的Padding Subheader，本发明实施例对此不进行限定。
此外，与方案(1.3)相同，在方案(1.5)中的上下行传输信道中分别新定义一个LCID值来指示包含Remote UE Index的MAC CE。
如此，Relay UE可以通过上述方案(1.1)～(1.5)向基站发送Remote UE的数据。
相对应的，作为Relay UE向基站发送数据的逆过程，在基站向Relay UE发送多个UE(Remote UE或Relay UE)的数据时，也可以参照上述方法，将该UE的数据、该UE的无线承载的标识、以及该UE的索引一起发送至Relay UE，以便Relay UE根据接收的UE的数据、该UE的无线承载的标识、以及该UE的索引确定将数据传给哪个UE(自身或者与其连接的Remote UE)。
下面结合图5，以基站向Relay UE发送至少一个Remote UE的数据，Relay UE将接收到的数据分别对应发送至至少一个Remote UE为例，对基站向Relay UE发送数据的方案进行描述，如图5所示，该方案可以包括如下步骤：
301：基站向Relay UE发送的第一消息，第一消息用于建立用于传输在所述基站和Relay UE间传输与RelayUE连接的Remote UE的数据的至少一个第一无线承载，所述第一消息中包含所述至少一 个第一无线承载的配置参数。
其中，所述至少一个第一无线承载中每个第一无线承载的配置参数包括：第一无线承载的标识和/或第一无线承载对应的逻辑信道标识LCID。
302：基站获取Remote UE的数据。
可选的，基站可以从核心网处获取Remote UE的数据。
303：基站确定Remote UE的索引。
其中，Remote UE可以为与Relay UE连接的任一Remote UE，且至少一个Remote UE中每个Remote UE的索引基站也是可知的。
可选的，基站可以在接收到核心网发送的Remote UE的数据之后，根据Remote UE的C-RNTI、以及Remote UE的Index与Remote UE的C-RNTI间的映射关系，确定出Remote UE的Index，基站确定Remote UE的Index的方式可以参照后续介绍的图6或图7所示的方案。
其中，基站为Remote UE的数据建立无线承载的方式可参照现有技术，在此不再重复赘述。
304：基站通过Remote UE的无线承载向Relay UE发送该Remote UE的数据，与该数据一起发给Relay UE还有：该无线承载的LCID、以及该Remote UE的索引。
其中，上述Remote UE的无线承载可以为图3a所示方案中Relay UE确定出的发送Remote UE的数据的第一无线承载。
需要说明的是，基站在向Relay UE发送Remote UE的数据的同时，还可以发送Relay UE自身的数据，本发明实施例对此不进行限定，即本发明可以采用图5所示的方案向基站同时发送多个Remote UE或者Relay UE的数据，只不过，发送Relay UE的数据的时候，可以不用携带Relay UE的索引。
可选的，在步骤204中，基站可以通过下述上述方案(2.1)～(2.5)将Remote UE的数据、Remote UE的每个无线承载的LCID、以及Remote UE的Index发送至Relay UE：
方案(2.1)：基站调度Remote UE/Relay UE的下行数据时，在调度下行数据的DCI(例如，DCI format 1A)中加入该调度信息所针对的Remote UE或者Relay UE的Index。根据该Index，Relay UE可以确定出所收到的下行数据是发送给自己的数据还是其中某个Remote UE的数据。
需要说明的是，只有当基站配置某个Relay UE开始为Remote UE提供数据转发服务后，在发送给该Relay UE的下行控制信息中才会包含所述Index，即Relay UE在解码DCI时会按照DCI中包含所述Index后的比特数和格式来解码DCI。否则，Relay UE按照目前的DCI中包含的比特数和格式来解码DCI。当基站发送的一个DCI为调度Relay UE的下行数据传输时，在DCI中包含Index，例如可以设为0000(假设Index用4bit表示)。
方案(2.2)～方案(2.5)与上述方案(1.2)～(1.5)相同，在此不再重复赘述。
如此，基站在向Relay UE发送多个Remote UE的数据的同时可以携带上Remote UE的索引、以及该Remote UE的数据所处的无线承载的LCID，通过LCID的重复使用以此避免现有技术中LCID取值有限的问题，同时，通过发送Remote UE的索引来区分具有相同LCID的无线承载上的数据为哪个Remote UE的数据。
可选的，对于与Relay UE连接的任一Remote UE，Relay UE和基站可以通过图6或图7或图8所示的方式确定Remote UE的索引，如图6所示，该方式可以包括以下步骤：
1011：Remote UE将自己的Layer 2ID上报给基站。
1012：基站收到Remote UE的Layer 2ID后，将Remote UE的Layer 2ID与Remote UE的小区无线网络临时标识(英文：Cell Radio Network Temporary Identifier，C-RNTI)建立映射关系。
其中，Remote UE的小区无线网络临时标识(英文：Cell Radio Network Temporary Identifier，C-RNTI)：为Remote UE在其服务小区内的唯一标识。
1013：当Remote UE发现并最终选择一个Relay UE后，Remote UE向Relay UE发送连接建立请求，该连接建立请求用于请求Relay UE与Remote UE建立连接，该连接建立请求中包含Remote UE会自己的Layer 2ID。
1014：Relay UE接收Remote UE发送的连接建立请求，向基站发送通知消息，该通知消息用于通知基站该Remote UE需要与自己建立D2D通信的连接，该通知消息包含Remote UE的Layer 2ID。
1015：基站接收Relay UE发送的通知消息，为Remote UE分配一个索引(Index)，并向Relay UE返回包含该Remote UE的索引以及所述索引与Remote UE的Layer 2ID之间的映射关系的响应消息，该响应消息用于通知Relay UE为Remote UE提供连接，同时，基站将该Remote UE的Index与Remote UE的C-RNTI建立映射关系。
1016：Relay UE接收基站发送的通知消息，向Remote UE返回连接建立响应，该连接建立响应用于通知Remote UE与其建立连接。
可选的，Relay UE可以在接收到基站发送的通知消息前向Remote UE返回连接建立响应。
如图7所示，该方式可以包括以下步骤：
执行2011～2013，其中，步骤2011与图5中的步骤1011相同，步骤2012与图5中的步骤1012相同，步骤2013与图5中的步骤1013相同，在此不再重复赘述。
接下来，执行步骤2014～2015：
2014：Relay UE接收Remote UE发送的连接建立请求，根据收到的Remote UE的Layer 2ID，为Remote UE分配一个Index，并向基站发送通知消息，该通知消息用于通知基站该Remote UE需要与自己建立D2D通信的连接，该通知消息包含Relay UE为Remote UE分配的Index以及Layer 2ID与Remote UE的Index的映射关系。
2015：基站接收Relay UE发送的通知消息，并向Relay UE返回用于通知Relay UE为Remote UE提供连接的响应消息，同时，基 站将该Remote UE的Index与Remote UE的C-RNTI建立映射关系。
可选的，基站可以根据步骤2012中Remote UE的Layer 2ID与Remote UE的C-RNTI间建立映射关系、以及通知消息中包含的Remote UE的Layer 2ID与Remote UE的Index的映射关系，将该Remote UE的Index与Remote UE的C-RNTI建立映射关系。
2016：Relay UE接收基站发送的通知消息，向Remote UE返回连接建立响应，该连接建立响应用于通知Remote UE与其建立连接。
如图8所示，该方式可以包括以下步骤：
3011：Remote UE发现并最终选择一个Relay UE后，Remote UE向Relay UE发送设备到设备间通信的连接建立请求，该连接建立请求用于请求Relay UE与Remote UE建立连接，该连接建立请求中包含Remote UE自己的Layer 2ID。
3012：Relay UE接收Remote UE发送的设备到设备间通信的连接建立请求，向基站发送通知消息，该通知消息用于通知基站该Remote UE需要与自己建立D2D通信的连接，该通知消息包含Remote UE的Layer 2ID。
3013：基站接收Relay UE发送的通知消息，为Remote UE分配一个索引(Index)，并向Relay UE返回包含该Remote UE的索引以及所述索引与Remote UE的Layer 2ID之间的映射关系的响应消息，该响应消息用于通知Relay UE为Remote UE提供连接。
3014：Relay UE接收基站发送的通知消息，向Remote UE返回设备到设备间通信的连接建立响应，该连接建立响应用于通知Remote UE与其建立连接。
可选的，Relay UE可以在接收到基站发送的通知消息前向Remote UE返回所述连接建立响应。
3015：基站接收Remote UE的无线资源控制(英文：Radio Resource Control，RRC)连接建立请求消息。该RRC连接建立请求消息通过Relay UE转发给基站。在Relay UE转发的包含RRC连接建立请求消息的数据中，包含步骤1013中Relay UE获得的Remote  UE的索引。在RRC连接建立请求消息中包含Remote UE的一个UE标识，例如为S-TMSI(英文SAE Temporary Mobile Station Identifier)。基站将该Remote UE的Index与Remote UE的S-TMSI建立映射关系，或者基站为Remote UE分配一个C-RNTI，并将Remote UE的Index与Remote UE的C-RNTI建立映射关系。
上述主要以Remote UE、Relay UE、以及基站交互的角度对本发明实施例提供的资源请求方法进行了介绍。可以理解的是，Remote UE、Relay UE、以及基站为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本发明能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
本发明实施例可以根据上述方法示例、结合附图对Remote UE、Relay UE、以及基站进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本发明实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用对应各个功能划分各个功能模块的情况下，图9为本发明实施例中所涉及的基站的一种可能的结构示意图，如图9所示，基站10可以用于实施上述图5所示方法实施例中基站所执行的方法，该基站20可以包括：发送单元101、接收单元102、确定单元103；发送单元101用于支持基站10执行图5中步骤301、步骤304的动作，接收单元102用于支持基站10执行图5中步骤302的动作，确定单元103用于支持基站10执行图5中步骤303的动作。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再重复赘述。
在采用集成的单元的情况下，需要说明的是，图9所示的确定单元103可以集成在图2所示处理器1012中，使处理器1012执行确定单元103的具体功能，发送单元101、接收单元102可以集成在图2所示的通信接口1011中，使通信接口1011执行发送单元101、接收单元102的具体功能。
在采用对应各个功能划分各个功能模块的情况下，图10为本发明实施例中所涉及的Relay UE的一种可能的结构示意图，如图10所示，Relay UE20可以用于实施上述图3或图3a所示方法实施例中Relay UE所执行的方法，该Relay UE20可以包括：接收单元201、确定单元202、发送单元203，接收单元201用于支持Relay UE20执行步骤201、步骤201的动作，确定单元202用于支持Relay UE20执行图3和图3a中的步骤202、步骤203、步骤203～205的动作，发送单元203用于支持Relay UE20执行图3和图3a中步骤104、步骤206的动作。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再重复赘述。
在采用集成的单元的情况下，需要说明的是，图10所示的确定单元202可以集成在图2所示处理器2012中，使处理器2012执行确定单元202的具体功能，接收单元201、发送单元203可以集成在图2所示的通信接口2011中，使通信接口2011执行接收单元201、发送单元203的具体功能。
再一方面，本发明实施例还提供一种数据传输系统，该数据传输系统可以包括：上述任一实施例所述的Remote UE30、Relay UE20、以及基站10。
本发明实施例提供的数据传输系统，实现上述图3或图3a或图5所示的数据传输方法，因此，可以达到与上述数据传输方法相同的有益效果，此处不再重复赘述。
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设备上。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，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个功能单元独立存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元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)执行本发明各个实施例所述方法的部分步骤。而前述的存储介质包括：通用串行总线(英文：Universal Serial Bus，USB)闪存驱动器(英文：USB flash drive)、移动硬盘、只读存储器(英文：read-only memory，ROM)、随机存取存储器(英文：random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记 载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案脱离权利要求的范围。

Claims (29)

  1. 一种数据传输方法，其特征在于，所述方法包括：
    中继用户设备Relay UE接收远端用户设备Remote UE的数据；所述数据包含所述Remote UE的第一标识，所述第一标识为所述Remote UE的层2地址；
    所述Relay UE根据所述第一标识，确定所述Remote UE的第二标识，所述第二标识为所述Remote UE在所述Relay UE下的唯一标识；
    所述Relay UE向基站发送所述Remote UE的数据、以及所述Remote UE的第二标识。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    所述Relay UE接收网络设备发送的第一消息，所述第一消息包含用于传输与所述Relay UE连接的Remote UE的数据的至少一个第一无线承载的配置参数；
    所述至少一个第一无线承载中每个第一无线承载的配置参数包括：所述第一无线承载的标识，或者所述第一无线承载对应的逻辑信道标识LCID；
    所述Relay UE根据所述至少一个第一无线承载的配置参数，为所述Remote UE建立所述至少一个第一无线承载。
  3. 根据权利要求1或2所述的方法，其特征在于，所述Relay UE接收Remote UE发送的数据，包括：
    所述Relay UE接收所述Remote UE通过至少一个第二无线承载发送的数据；
    所述数据中还携带：每个第二无线承载的标识或者每个第二无线承载的LCID。
  4. 根据权利要求3所述方法，其特征在于，所述方法还包括
    所述Relay UE根据每个第二无线承载的标识，或者每个第二无线承载的LCID，确定所述Remote UE的数据对应的第一无线承载；
    所述Relay UE向基站发送所述数据、以及所述Remote UE的第 二标识，包括：
    所述Relay UE通过与所述数据相对应的第一无线承载向基站发送所述数据，与所述数据一同发送的还包括所述Remote UE的第二标识、以及与所述数据对应的第一无线承载的LCID。
  5. 根据权利要求2-4任一项所述的方法，其特征在于，
    同一Remote UE的每个第一无线承载配置唯一的无线承载标识和/或者LCID，不同Remote UE间的第一无线承载配置相同的无线承载标识和/或者逻辑信道标识。
  6. 根据权利要求2-5任一项所述的方法，其特征在于，所述Relay UE通过与所述数据相对应的第一无线承载向基站发送所述数据、所述Remote UE的第二标识、以及与所述数据对应的第一无线承载的LCID，包括：
    将所述Remote UE的第二标识、与所述数据对应的第一无线承载的LCID以及所述数据携带在媒体接入控制协议数据单元MAC PDU中向基站发送。
  7. 根据权利要求6所述的方法，其特征在于，
    所述Remote UE的第二标识携带在所述MAC PDU中的第一MAC subheader或者一个MAC CE中；
    与所述数据对应的第一无线承载的LCID携带在所述MAC PDU中的第二MAC subheader中；
    所述数据携带在所述MAC PDU中的一个MAC SDU中。
  8. 根据权利要求7所述的方法，其特征在于，所述Remote UE的第二标识携带在所述MAC PDU中的第一MAC subheader中，包括：
    所述第一MAC subheader包含所述Remote UE的第二标识。
  9. 根据权利要求7所述的方法，其特征在于，所述Remote UE的第二标识携带在所述MAC PDU中的第一MAC subheader中，包括：
    所述第一MAC subheader包含比特图bitmap，所述bitmap包含至少一个比特位，其中，所述至少一个比特位中的比特位n用于指示所述MAC PDU中是否包含与所述Relay UE连接的第二标识为n的 Remote UE的数据，所述n为0或者大于等于1的整数。
  10. 根据权利要求7所述的方法，其特征在于，所述Remote UE的第二标识携带在所述MAC PDU中的一个MAC CE中，包括：
    所述MAC CE包含所述Remote UE的第二标识；
    相对应的，所述MAC PDU还包含第三MAC Subheader，所述第三Subheader包含用于指示所述MAC CE为包含所述Remote UE的第二标识的LCID。
  11. 根据权利要求7所述的方法，其特征在于，所述Remote UE的第二标识携带在所述MAC PDU中的一个MAC CE中，包括：
    所述MAC CE包含bitmap，所述bitmap包含至少一个比特位，其中，所述至少一个比特位中的比特位n用于指示所述MAC PDU中是否包含与所述Relay UE连接的第二标识为n的Remote UE的数据，所述n为0或者大于等于1的整数；
    相对应的，所述MAC PDU还包含第四MAC Subheader，所述第四MAC Subheader包含用于指示所述MAC CE为包含所述bitmap的MAC CE。
  12. 根据权利要求1-11任一项所述的方法，其特征在于，所述Relay UE根据所述第一标识，确定所述Remote UE的第二标识，包括：
    所述Relay UE接收所述Remote UE发送的连接建立请求，所述连接建立请求用于请求所述Relay UE与所述Remote UE建立连接，所述连接建立请求包含所述Remote UE的第一标识；
    所述Relay UE向所述基站发送通知消息，所述通知消息包含所述Remote UE的第一标识，所述通知消息用于所述基站确定所述Remote UE的第二标识；
    所述Relay UE接收所述基站返回的包含所述Remote UE的第二标识与所述第一标识映射关系的响应消息，所述Remote UE的第二标识由所述基站确定；
    所述Relay UE根据所述响应消息确定所述Remote UE的第二标 识以及所述第二标识与第一标识的映射关系。
  13. 根据权利要求1-11任一项所述的方法，其特征在于，所述Relay UE根据所述第一标识，确定所述Remote UE的第二标识，包括：
    所述Relay UE接收所述Remote UE发送的连接建立请求，所述连接建立请求用于请求所述Relay UE与所述Remote UE建立连接，所述连接建立请求包含所述Remote UE的第一标识；
    所述Relay UE确定所述Remote UE的第二标识，并将所述Remote UE的第二标识与所述Remote UE的第一标识建立映射关系；
    相应的，所述方法还包括：
    所述Relay UE向所述基站发送通知消息，所述通知消息包含所述Remote UE的第二标识和/或第二标识与第一标识的映射关系。
  14. 根据权利要求1-13任一项所述的方法，其特征在于，
    所述Remote UE的第一标识为所述Remote UE的源媒体接入控制MAC地址，或者所述Remote UE用于长期演进LTE系统中设备到设备间通信的用户设备标识。
  15. 一种中继用户设备Relay UE，其特征在于，所述Relay UE包括：
    通信接口，用于接收远端用户设备Remote UE的数据，所述数据包含所述Remote UE的第一标识，所述第一标识为所述Remote UE的层2地址；
    处理器，用于根据所述通信接口接收到的第一标识，确定所述Remote UE的第二标识，所述第二标识为所述Remote UE在所述Relay UE下的唯一标识；
    所述通信接口，还用于向基站发送所述通信接口接收到的Remote UE的数据、以及所述Remote UE的第二标识。
  16. 根据权利要求15所述的Relay UE，其特征在于，
    所述通信接口，还用于接收网络设备发送的第一消息，所述第一消息包含用于传输与所述RelayUE连接的Remote UE的数据的至少 一个第一无线承载的配置参数；
    所述至少一个第一无线承载中每个第一无线承载的配置参数包括：所述第一无线承载的标识，或者所述第一无线承载对应的逻辑信道标识LCID；
    所述处理器，还用于根据所述至少一个第一无线承载的配置参数，为所述Remote UE建立所述至少一个第一无线承载。
  17. 根据权利要求15或16所述的Relay UE，其特征在于，
    所述通信接口，还用于接收所述Remote UE通过至少一个第二无线承载发送的数据；
    所述数据中还携带：每个第二无线承载的标识或者每个第二无线承载的LCID。
  18. 根据权利要求17所述Relay UE，其特征在于，
    所述处理器，还用于根据每个第二无线承载的标识，或者每个第二无线承载的LCID，确定所述Remote UE的数据对应的第一无线承载；
    所述通信接口，具体用于通过与所述数据相对应的第一无线承载向基站发送所述数据，与所述数据一同发送的还包括所述Remote UE的第二标识、以及与所述数据对应的第一无线承载的LCID。
  19. 根据权利要求16-18任一项所述的Relay UE，其特征在于，
    同一Remote UE的每个第一无线承载配置唯一的无线承载标识和/或者LCID，不同Remote UE间的第一无线承载配置相同的无线承载标识和/或者逻辑信道标识。
  20. 根据权利要求16-19任一项所述的Relay UE，其特征在于，
    所述通信接口，具体用于将所述Remote UE的第二标识、与所述数据对应的第一无线承载的LCID以及所述数据携带在媒体接入控制协议数据单元MAC PDU中向基站发送。
  21. 根据权利要求20所述的Relay UE，其特征在于，
    所述Remote UE的第二标识携带在所述MAC PDU中的第一MAC subheader或者一个MAC CE中；
    与所述数据对应的第一无线承载的LCID携带在所述MAC PDU中的第二MAC subheader中；
    所述数据携带在所述MAC PDU中的一个MAC SDU中。
  22. 根据权利要求21所述的Relay UE，其特征在于，所述Remote UE的第二标识携带在所述MAC PDU中的第一MAC subheader中，包括：
    所述第一MAC subheader包含所述Remote UE的第二标识。
  23. 根据权利要求21所述的Relay UE，其特征在于，所述Remote UE的第二标识携带在所述MAC PDU中的第一MAC subheader中，包括：
    所述第一MAC subheader包含比特图bitmap，所述bitmap包含至少一个比特位，其中，所述至少一个比特位中的比特位n用于指示所述MAC PDU中是否包含与所述Relay UE连接的第二标识为n的Remote UE的数据，所述n为0或者大于等于1的整数。
  24. 根据权利要求21所述的Relay UE，其特征在于，所述Remote UE的第二标识携带在所述MAC PDU中的一个MAC CE中，包括：
    所述MAC CE包含所述Remote UE的第二标识；
    相对应的，所述MAC PDU还包含第三MAC Subheader，所述第三Subheader包含用于指示所述MAC CE为包含所述Remote UE的第二标识的LCID。
  25. 根据权利要求21所述的Relay UE，其特征在于，所述Remote UE的第二标识携带在所述MAC PDU中的一个MAC CE中，包括：
    所述MAC CE包含bitmap，所述bitmap包含至少一个比特位，其中，所述至少一个比特位中的比特位n用于指示所述MAC PDU中是否包含与所述Relay UE连接的第二标识为n的Remote UE的数据，所述n为0或者大于等于1的整数；
    相对应的，所述MAC PDU还包含第四MAC Subheader，所述第四MAC Subheader包含用于指示所述MAC CE为包含所述bitmap的MAC CE。
  26. 根据权利要求15-25任一项所述的Relay UE，其特征在于，
    所述通信接口，还用于接收所述Remote UE发送的连接建立请求，所述连接建立请求用于请求所述Relay UE与所述Remote UE建立连接，所述连接建立请求包含所述Remote UE的第一标识；
    所述通信接口，还用于向所述基站发送通知消息，所述通知消息包含所述Remote UE的第一标识，所述通知消息用于所述基站确定所述Remote UE的第二标识；
    所述通信接口，还用于接收所述基站返回的包含所述Remote UE的第二标识与所述第一标识映射关系的响应消息，所述Remote UE的第二标识由所述基站确定；
    所述处理器，还用于根据所述响应消息确定所述Remote UE的第二标识以及所述第二标识与第一标识的映射关系。
  27. 根据权利要求15-25任一项所述的Relay UE，其特征在于，
    所述通信接口，还用于接收所述Remote UE发送的连接建立请求，所述连接建立请求用于请求所述Relay UE与所述Remote UE建立连接，所述连接建立请求包含所述Remote UE的第一标识；
    所述处理器，还用于确定所述Remote UE的第二标识，以及将所述Remote UE的第二标识与所述Remote UE的第一标识建立映射关系；
    所述通信接口，还用于向所述基站发送通知消息，所述通知消息包含所述Remote UE的第二标识和/或第二标识与第一标识的映射关系。
  28. 根据权利要求15-27任一项所述的Relay UE，其特征在于，
    所述Remote UE的第一标识为所述Remote UE的源媒体接入控制MAC地址，或者所述Remote UE用于长期演进LTE系统中设备到设备间通信的用户设备标识。
  29. 一种数据传输系统，其特征在于，包括：远端用户设备Remote UE、如权利要求15～28任一项所述的中继用户设备Relay UE、以及基站。
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WO2022120653A1 (zh) * 2020-12-09 2022-06-16 华为技术有限公司 一种路由方法、装置以及系统
WO2022170611A1 (en) * 2021-02-11 2022-08-18 Qualcomm Incorporated Joint transmission of control information and data in relay-based communication
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CN113438644A (zh) 2021-09-24
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AU2016424413A1 (en) 2019-05-23
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