WO2018090491A1 - 一种指示方法及相关设备 - Google Patents

一种指示方法及相关设备 Download PDF

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Publication number
WO2018090491A1
WO2018090491A1 PCT/CN2017/072875 CN2017072875W WO2018090491A1 WO 2018090491 A1 WO2018090491 A1 WO 2018090491A1 CN 2017072875 W CN2017072875 W CN 2017072875W WO 2018090491 A1 WO2018090491 A1 WO 2018090491A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
message
network
threshold
relay
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Application number
PCT/CN2017/072875
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English (en)
French (fr)
Inventor
徐海博
坦尼纳坦•爱德华
邝奕如
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.)
Filing date
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 EP23157277.7A priority Critical patent/EP4221356A3/en
Priority to US16/461,653 priority patent/US11452154B2/en
Priority to EP17872818.4A priority patent/EP3531723B1/en
Priority to CN201780056586.5A priority patent/CN109716700B/zh
Publication of WO2018090491A1 publication Critical patent/WO2018090491A1/zh
Priority to US17/884,127 priority patent/US11917702B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • 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
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • 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
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15557—Selecting relay station operation mode, e.g. between amplify and forward mode, decode and forward mode or FDD - and TDD mode
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • 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 an indication method and related devices.
  • the device-to-device (D2D) communication mode refers to the communication mode in which the transmitting end directly sends data to the receiving end without transiting through the base station or the cellular network.
  • a special mode of the D2D communication mode is that a user equipment (User Equipment, UE) is connected to the network through another user equipment with a relay function.
  • the former is generally referred to as a remote user equipment (ie, Remote UE), and the latter is referred to as a relay user equipment (ie, Relay UE, or UE-to-Network Relay).
  • the Relay mechanism based on the IP layer is defined in the 3rd Generation Partnership Project (3GPP) Rel 13, that is, the Remote UE connects and communicates with the network through a Relay UE, and the Relay UE passes The IP layer forwards the communication data between the Remote UE and the network.
  • 3GPP 3rd Generation Partnership Project
  • the Remote UE and the Relay UE will only connect and communicate through the 3GPP-developed Sidelink technology.
  • the Layer 3 Relay mechanism business continuity and the visibility of the Remote UE on the network side cannot be guaranteed, and can be managed and controlled.
  • a data relay method based on the RLC layer or higher and below the PDCP layer can be used.
  • the manner of performing data forwarding below the PDCP layer by using the RLC layer above the Relay UE may be referred to as Layer 2 UE-to-NW Relay.
  • the Remote UE may be referred to as an Evolved Remote UE (ie, an eRemote UE)
  • the Relay UE may be referred to as an Evolved Relay UE (ie, an eRelay UE or an Evolved UE-to-NW Relay, an evolved user equipment to the network relay) .
  • the non-3GPP access technology can be used for connection, such as WLAN and Bluetooth.
  • the embodiment of the present invention provides an indication method and related equipment.
  • an embodiment of the present invention provides an indication method, including:
  • the first user equipment receives the second message sent by the network device, where the second message includes information indicating that the network device supports the relayed user equipment to the network, or the second message includes the network setting
  • the cell that sends the second message above supports the information of the relay of the evolved user equipment to the network. It can be seen that one relay user equipment and one network device inform the eRemote UE of the support of the Layer-2 Relay by the indication information, or inform the eRemote UE that the cell that sends the indication information supports the Layer-2 Relay.
  • the relay user equipment cannot establish a connection and communication with the network through the relay user equipment, and the waste of resources and the remote end caused by the process can be avoided.
  • User equipment access delay or data communication delay
  • the foregoing first message is a device-to-device discovery message, or the first message is a Radio Resource Control Layer (RRC) message.
  • RRC Radio Resource Control Layer
  • the remote user equipment can learn whether the discovered relay user equipment supports the Layer-2 Relay function during the discovery process of the relay user equipment, thereby preventing the remote user equipment from supporting one of the Layer-relays. After the relay user equipment of the 2Relay function establishes a connection, it cannot connect and communicate with the network through the relay device.
  • the first message is an RRC message
  • the discovery message for the Sidelink technology can be avoided by the non-3GPP technology.
  • the discovery message when the content type of the discovery message is a first preset value, is an announcement message for the relayed user equipment to the network to discover the relay, or the discovery message is used. A response message discovered by the evolved user equipment to the network. This embodiment avoids the use of extra bits.
  • the foregoing discovery message includes first indication information, where the first indication information is used to indicate that the second user equipment supports the evolved user equipment to the network, and/or the first indication information.
  • the relay for indicating that the second user equipment is an evolved user equipment to the network.
  • the second user equipment can send only one discovery message, and does not need to separately send the discovery message for Layer-3Rela and the discovery message of Layer-2Relay, thereby saving resources. s expenses.
  • the discovery message includes the second indication information and/or the third indication information, where the second indication information is used to indicate that the second user equipment supports the first user equipment by using a side link.
  • the relaying function of the connected user equipment to the network the third indication information is used to indicate that the second user equipment supports the relaying function of the evolved user equipment to the network connected to the first user equipment by using the non-3GPP interface .
  • the second user equipment can clearly distinguish the support of the Layer-2 Relay function based on the sidelink technology and the support of the Layer-2 Relay based on the non-3GPP technology.
  • the foregoing RRC message includes related system information of the serving cell where the second user equipment is located; or the RRC message includes fourth indication information, where the fourth indication information is used to indicate that the second user equipment supports The relay function of the evolved user equipment to the network.
  • the first user equipment receives the first message sent by the second user equipment, where: when the first user equipment supports the second user equipment to connect through the side link, the foregoing Receiving, by the user equipment, the first message sent by the second user equipment by using the side line link; when the first user equipment supports the connection with the second user equipment by using the non-3GPP interface, the first user equipment is received by using the non-3GPP interface.
  • the first message sent by the second user equipment For the first user equipment supporting only the non-3GPP interface technology, it is also known whether the second user equipment supports the Layer-2 Relay function without using the side-link technology.
  • the first user equipment receives the first message sent by the second user equipment, where the first user equipment receives the first message sent by the second user equipment by using the side line.
  • the first user equipment supporting both the side-link technology and the non-3GPP interface technology can pass the second user equipment.
  • the first message sent by the sidelink technology can pass the second user equipment.
  • the first user equipment is configured with an adaptation layer, and the first user equipment receives the first message sent by the second user equipment by using the non-3GPP interface, including:
  • the adaptation layer of the first user equipment receives the adaptation layer protocol data unit (PDU) sent by the second user equipment by using the non-3GPP interface, where the adaptation layer PDU includes the fifth indication information and the first message, the fifth The indication information is used to indicate that the adaptation layer PDU includes the foregoing first message.
  • PDU adaptation layer protocol data unit
  • the first user equipment receives the discovery message sent by the second user equipment, where the first user equipment receives the foregoing discovery message sent by the second user equipment by listening to the receiving resource pool, and the receiving The resource pool is configured to receive device-to-device discovery messages sent by the evolved user equipment to the network.
  • the foregoing second message includes the first configuration information of the first user equipment and the second configuration information of the second user equipment.
  • the network device can control, by using the first configuration information and the second configuration information, the conditions for the first user equipment and the second user equipment to initiate data transmission according to the layer Layer-2 Relay, and the network device can be implicitly indicated on the other hand. Support for Layer-2 Relay operations.
  • the foregoing second configuration information includes a first threshold, where the first threshold is used to indicate that the second user equipment is allowed to the first user when the RSRP of the Uu link is higher than the first threshold.
  • the device sends the first message.
  • the foregoing first configuration information includes at least one of the following: 1) a second threshold, where the second threshold is used for Instructing the first user equipment to be allowed to send a request message for the relayed user equipment to the network to discover the relay when the RSRP of the Uu link is lower than the second threshold; 2) a third threshold, the third threshold When the RSRP of the side link of the first user equipment and the second user equipment is higher than the foregoing third threshold, the second user equipment is allowed to use the second user equipment as a candidate evolved user equipment. Relay to the network.
  • the foregoing first configuration information includes at least one of the following: 1) a fourth threshold, where the fourth threshold is used to indicate The first user equipment is allowed to perform indirect communication with the network through the second user equipment when the RSRP of the Uu link is lower than the fourth threshold; 2) a fifth threshold, where the fifth threshold is used to indicate the first user And when the channel quality of the non-3GPP link between the first user equipment and the second user equipment is higher than the foregoing fifth threshold, the foregoing second user equipment is used as a relay of the evolved user equipment to the network.
  • an indication method including:
  • a second message sent by the network device where the second message includes information indicating that the network device supports the relay of the evolved user equipment to the network, or the second message includes a cell support that indicates that the network device sends the second message Information about the relay of the evolved user equipment to the network.
  • a network device informs the eRemote UE and the Relay UE that the cell that sends the indication information supports the Layer-2 Relay by using the indication information. Therefore, after the eRemote UE establishes a connection with a relay user equipment that does not support the Layer-2 Relay function, the relay user equipment cannot establish a connection and communication with the network through the relay user equipment, and the waste of resources and the remote end caused by the process can be avoided.
  • the foregoing second message includes the first configuration information of the first user equipment and the second configuration information of the second user equipment.
  • the network device can control, by using the first configuration information and the second configuration information, the conditions for the first user equipment and the second user equipment to initiate data transmission according to the layer Layer-2 Relay, and the network device can be implicitly indicated on the other hand. Support for Layer-2 Relay operations.
  • the foregoing second configuration information includes a first threshold, where the first threshold is used to indicate that the second user equipment is allowed to the first user when the RSRP of the Uu link is higher than the first threshold.
  • the device sends the first message.
  • the foregoing first configuration information includes at least one of the following: 1) a second threshold, where the second threshold is used for Instructing the first user equipment to be allowed to send a request message for the relayed user equipment to the network to discover the relay when the RSRP of the Uu link is lower than the second threshold; 2) a third threshold, the third threshold When the RSRP of the side link of the first user equipment and the second user equipment is higher than the foregoing third threshold, the second user equipment is allowed to use the second user equipment as a candidate evolved user equipment. Relay to the network.
  • the foregoing first configuration information includes at least one of the following: 1) a fourth threshold, where the fourth threshold is used to indicate The first user equipment is allowed to perform indirect communication with the network through the second user equipment when the RSRP of the Uu link is lower than the fourth threshold; 2) a fifth threshold, where the fifth threshold is used to indicate the first user And when the channel quality of the non-3GPP link between the first user equipment and the second user equipment is higher than the foregoing fifth threshold, the foregoing second user equipment is used as a relay of the evolved user equipment to the network.
  • the invention provides a user equipment comprising means for performing the method of the first aspect.
  • the invention provides a network device comprising means for performing the method of the second aspect.
  • the present invention provides a user equipment, where the user equipment includes a processor, and the processor is configured to support the user equipment to perform a corresponding function in an indication method provided by the first aspect.
  • the user equipment can also include a memory for coupling with the processor that holds program instructions and data necessary for the user equipment.
  • the user equipment can also include a communication interface for the user equipment to communicate with other devices or communication networks.
  • the present invention provides a network device including a processor configured to support the network device to perform a corresponding function in an indication method provided by the first aspect.
  • the network device can also include a memory for coupling with the processor that retains the program instructions and data necessary for the network device.
  • the network device can also include a communication interface for the network device to communicate with other devices or communication networks.
  • the present invention provides a computer storage medium for storing computer software instructions for use by the user equipment provided in the fifth aspect above, comprising a program designed to perform the above aspects.
  • the present invention provides a computer storage medium for storing computer software instructions for use in the network device provided by the sixth aspect, comprising a program designed to perform the above aspects.
  • the solution eRemote UE provided by the present invention can use the indication information to know whether a Relay UE and a currently serving cell support Layer-2 Relay.
  • FIG. 1 is a schematic diagram of a communication architecture provided by an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of an indication method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a user plane protocol stack architecture of a user equipment to network relay based on layer 2 evolution according to an embodiment of the present invention
  • FIG. 3b is a schematic diagram of a control plane protocol stack architecture of a user equipment to network relay based on layer 2 evolution according to an embodiment of the present invention
  • 4a is a schematic diagram of another user plane protocol stack architecture of a user equipment-to-network relay based on layer 2 evolution according to an embodiment of the present invention
  • 4b is a schematic diagram of another control plane protocol stack architecture of a user equipment-to-network relay based on layer 2 evolution according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a format of a message type included in a Discovery message according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a protocol stack architecture for transmitting a Discovery message of a PC5 through a PC5 interface according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a protocol stack architecture for transmitting a discovery message of a PC5 by using a non-3GPP technology according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of a protocol stack corresponding to a device-to-device communication mechanism based on PC5 technology according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a protocol stack corresponding to a device-to-device communication mechanism based on non-3GPP technology according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a network device according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a network architecture disclosed in an embodiment of the present invention.
  • the network architecture shown in FIG. 1 includes a first user equipment 110, a second user equipment 120, and a network equipment 130.
  • the first user equipment 110 is an eRemote UE
  • the second user equipment is an eRelay UE (or may be referred to as an evolved user equipment to a network relay)
  • the communication between the first user equipment 110 and the second user equipment 120 is
  • a device-to-device communication mechanism based on 3GPP Sidelink/PC5 technology may be employed, and communication based on non-3GPP technologies, such as WLAN and Bluetooth mechanisms, may also be employed.
  • the eRelay UE the evolved UE-to-NW relay, and the Layer-2 Relay UE have the same meaning.
  • the first user equipment may be a wearable device, such as a smart watch, a smart bracelet, a pedometer, or the like, or may be an Internet of Things device.
  • the second user device is a device that provides voice and/or data connectivity to the user, for example, a handheld device with wireless connectivity, an in-vehicle device, and the like.
  • Common terminals include, for example, mobile phones, tablets, notebook computers, palmtop computers, mobile internet devices (MIDs), and the like.
  • the network device refers to a node device on the network side.
  • the network device may be a radio access network (RAN) device on the access network side of the cellular network, and the so-called RAN device is a terminal that accesses the terminal.
  • the device to the wireless network including but not limited to: an evolved Node B (eNB), a radio network controller (RNC), a Node B (NB), and a base station controller (Base Station) Controller, BSC), Base Transceiver Station (BTS), home base station (for example, Home evolved NodeB, or Home Node B, HNB), BaseBand Unit (BBU); for example, the network device can also be A node device in a Wireless Local Area Network (WLAN), such as an access controller (AC), a gateway, or a WIFI access point (AP).
  • WLAN Wireless Local Area Network
  • AC access controller
  • AP WIFI access point
  • FIG. 2 is a schematic flowchart of an indication method according to an embodiment of the present invention, including the following steps:
  • the second user equipment sends a first message to the first user equipment, where the first user equipment receives the first message sent by the second user equipment, and the first message includes the second user
  • the device supports information on the relay function of the evolved user equipment to the network.
  • S202 The network device sends a second message, where the first user equipment receives the second message sent by the network device, and the second user equipment receives the second message sent by the network device, where the second message is sent. And including, in the second message, information indicating that the network device supports the evolved user equipment to the relay of the network, or the second message includes a cell indicating that the network device sends the second message to support the evolved user equipment to the network. Information.
  • the second user equipment supports the relay function of the evolved user equipment to the network, that is, the second user equipment supports the protocol stack architecture shown by (FIG. 3a and FIG. 3b) and/or (FIG. 4a and FIG. 4b).
  • a user equipment relays user plane data and control plane signaling between the first user equipment and the network.
  • Figure 3a and 3b are the first user equipment connected to the network through the second user equipment, and when the first user equipment and the second user equipment are connected by the Sidelink technology, the corresponding user plane and the control plane end To the end of the protocol stack.
  • Figure 3a is a Layer 2 evolved user equipment to network relayed user plane protocol stack architecture (PC5).
  • Figure 3b is a Layer 2 evolved user equipment to network relayed control plane protocol stack architecture (PC5).
  • 4a and 4b are a user plane and a control plane when the first user equipment is connected to the network through the second user equipment, and the first user equipment and the second user equipment are connected by using a non-3GPP access technology.
  • End-to-end protocol stack. 4a is a user plane protocol stack architecture of a user equipment to network relay based on layer 2
  • FIG. 4b is a control plane protocol stack of a user equipment to network relay based on layer 2 evolution. Architecture (non-3GPP access).
  • the network device supports the operation of the relay of the evolved user equipment to the network, that is, the network device supports an evolved remote user equipment to connect with the network and perform service data/control signaling transmission through an evolved relay user equipment.
  • the first message is a device-to-device discovery message based on the Sidelink technology or the PC5 interface.
  • the content type of the discovery message is a first preset value, indicating the sending
  • the current message is an evolved UE-to-NW relay discovery announcement for the evolved user equipment to the network, or indicates that the discovery message is a relay discovery for the evolved user equipment to the network.
  • Evolved UE-to-NW relay discovery Response when the content type of the discovery message is a first preset value, indicating the sending
  • the current message is an evolved UE-to-NW relay discovery announcement for the evolved user equipment to the network, or indicates that the discovery message is a relay discovery for the evolved user equipment to the network.
  • the format of the message type (Message Type) included in the Discovery message is as shown in FIG. 5.
  • the value of the Content Type in the Message Type and the corresponding meaning are shown in Table 1.
  • the value of the reserved value in the current Content Type (such as 0011, 1001 to 1111 in Table 1) is used to define the corresponding discovery message as the discovery message for the evolved UE-to-NW Relay.
  • the corresponding discovery message is defined as an evolved UE-to-NW relay discovery announcement or evolved UE-to-NW relay discovery Response.
  • the value of the Content Type of the Message Type in the discovery message sent by the second user equipment is set to 1001.
  • the second user equipment needs to send two discovery messages during the discovery process, and the Content Type value of the Message Type in a discovery message.
  • the value of the Content Type of the Message Type in the other discovery message is set to 1001.
  • the first user equipment When a first user equipment wishing to discover the Layer-2 Relay receives the discovery sent by the second user equipment When the value of the Content Type in the message is 1001, the first user equipment can know that the second user equipment supports the Layer-2 Relay function, and the serving cell of the second user equipment also supports the Layer-2 Relay operation.
  • the discovery message includes first indication information, where the first indication information is used to indicate that the second user equipment supports an evolved user equipment to a relay function of the network, and/ Or the first indication information is used to indicate that the second user equipment is a relay of the evolved user equipment to the network.
  • the discovery message includes, but is not limited to, a UE-to-Network Relay discovery announcement message, and a UE-to-Network Relay discovery response message.
  • a 1-bit information (ie, first indication information) may be set in the PC5 discovery message, where the information of the 1 bit is used to indicate that the second user equipment supports the Layer-2 Relay.
  • Table 2 is the content of the UE-to-Network Relay discovery announcement message, and a new information (ie, the first indication information) is defined by occupying 1 bit in the Spare information in Table 2, the new The defined information is used to indicate that the second user equipment supports Layer-2 Relay. For example, if the second user equipment supports the Layer-2 Relay, the value of the newly defined information bit in the discovery message sent by the second user equipment is set to “1”, indicating that the second user equipment supports the Layer-2 Relay.
  • the first user equipment that supports the Layer-2Relay After receiving the discovery message sent by the second user equipment, the first user equipment that supports the Layer-2Relay reads the value of the first indication information in the discovery message. If the value of the first indication information in the discovery message is "1", the first user equipment may determine that the second user equipment supports the Layer-2 Relay.
  • the discovery message includes second indication information and/or third indication information
  • the second indication information is used to indicate that the second user equipment supports an evolved user equipment to network relay function that is connected to the first user equipment by using a side link
  • the third information is used to indicate the The second user equipment supports an evolved user equipment to network relay function that is connected to the first user equipment through a non-3GPP access technology.
  • the information of the two bits is used to indicate that the second user equipment is supported by setting information of one bit or two bits (ie, second indication information and/or third indication information) in the PC5 discovery message.
  • a Layer-2 Relay function that is connected to the first user equipment through a side link
  • a Layer-2 Relay function that is connected to the first user equipment through a non-3GPP access technology.
  • the PC5 discovery message includes, but is not limited to, a UE-to-Network Relay discovery announcement message, and a UE-to-Network Relay discovery response message.
  • Table 2 is the content of the UE-to-Network Relay discovery announcement message, which defines one or two new information by occupying one or two bits in the Spare information in Table 2 (ie, Two indication information and/or third indication information, the newly defined two new information are respectively used to indicate that the second user equipment supports a Layer-2 Relay function that is connected to the first user equipment through a side link. And a Layer-2 Relay function connected to the first user equipment through a non-3GPP access technology. For example, if the second user equipment supports the Layer-2 Relay function that is connected to the first user equipment through the side link, the value of the newly defined corresponding information bit in the discovery message sent by the second user equipment is set to “ 1".
  • the first user equipment supporting the Layer-2Relay After receiving the discovery message sent by the second user equipment, the first user equipment supporting the Layer-2Relay reads the value of the second indication information in the discovery message. If the value of the second indication information in the discovery message is "1", the first user equipment may determine that the second user equipment supports the Layer-2 Relay function that is connected to the first user equipment through the side link. For the same reason, when the second user equipment supports the Layer-2 Relay function that is connected to the first user equipment through the non-3GPP access technology, the specific implementation manner is the same as above, and is not described herein.
  • the first user when the second user equipment supports the evolved user equipment to the network relay function connected to the first user equipment through the side link, the first user is also supported by the non-3GPP technology.
  • the second user equipment sends the first message through the side link, and the first user equipment receives the first message sent by the second user equipment by using the side line link ( That is, the second user equipment discovers with the first user equipment through the discovery mechanism of the Sidelink technology.
  • the first message is used to indicate information that the second user equipment supports the relay function of the evolved user equipment to the network.
  • the first message includes a discovery message, including but not limited to a UE-to-Network Relay discovery announcement message, and a UE-to-Network Relay discovery response message.
  • the information contained in the discovery message includes one of the following three situations:
  • the second user equipment when the second user equipment supports the relaying function of the evolved user equipment to the network connected to the first user equipment by the side link, the second user equipment sends the The first user equipment receives the first message sent by the second user equipment by using the side line link (ie, the second user equipment discovers with the first user equipment by using a discovery mechanism of the Sidelink technology).
  • the first message is used to indicate information that the second user equipment supports the relay function of the evolved user equipment to the network.
  • the first message includes a discovery message, including but not limited to a UE-to-Network Relay discovery announcement message, and a UE-to-Network Relay discovery response message.
  • the message included in the discovery message includes one of the following two situations:
  • the second user equipment when the second user equipment supports the relayed user equipment to the network relay function connected to the first user equipment by using the non-3GPP technology, the second user equipment sends the first message through the non-3GPP interface, where A user equipment receives the first message sent by the second user equipment through the non-3GPP interface (ie, the second user equipment discovers with the first user equipment through a discovery mechanism of the non-3GPP technology).
  • the first message is used to indicate information that the second user equipment supports the relay function of the evolved user equipment to the network.
  • the first message includes a discovery message, including but not limited to a UE-to-Network Relay discovery announcement message, and a UE-to-Network Relay discovery response message.
  • the message included in the discovery message includes one of the following two situations:
  • the method shown in FIG. 2 further includes:
  • the first user equipment sends a third message, where the third message includes information indicating that the first user equipment needs to discover the relay of the evolved user equipment to the network.
  • the third message is a device-to-device discovery solicitation message.
  • the discovery request message is a request message for relayed user equipment to network relay discovery ( Evolved UE-to-Network Relay Discovery Solicitation).
  • the value of the Content Type of the Message Type in the discovery solicitation message sent by the first user equipment is set to 1010.
  • the eRelay UE supporting Layer-2Relay receives the discovery sent by the first user equipment In the solicitation message, if the value of the Content Type of the Message Type in the discovery solicitation message is 1010, the eRelay UE may know that the first user equipment needs to discover an eRelay UE supporting the Layer-2 Relay.
  • the discovery request message includes sixth indication information, where the sixth indication information is used to indicate that the first user equipment needs to discover a relay of the evolved user equipment to the network.
  • a bit information (ie, the sixth indication information) may be set in the PC5 discovery message, where the information of the 1 bit is used to indicate that the first user equipment needs to discover an eRelay UE that supports the Layer-2 Relay.
  • the PC5 discovery message includes, but is not limited to, a UE-to-Network Relay discovery request message.
  • Table 3 is the content of the UE-to-Network Relay Discovery Request message, and a new information (ie, the sixth indication information) is defined by occupying 1 bit in the Spare information in Table 3, the new The defined information is used to indicate that the first user equipment needs to discover the eRelay UE supporting the Layer-2 Relay. For example, if the first user equipment needs to discover the eRelay UE that supports the Layer-2 Relay, the value of the newly defined information bit in the discovery message sent by the first user equipment is set to “1”, indicating that the first user equipment needs to discover and support the Layer.
  • the eRelay UE supporting the Layer-2Relay After receiving the discovery message sent by the first user equipment, the eRelay UE supporting the Layer-2Relay will read the value of the sixth indication information in the discovery message. If the value of the sixth indication information in the discovery message is "1", the eRelay UE supporting the Layer-2 Relay may determine that the first user equipment needs to discover the Relay UE supporting the Layer 2 function.
  • the discovery request message includes seventh indication information and/or eighth indication information, where the seventh indication information is used to indicate that the first user equipment needs to find support through the side line. a relay of the evolved user equipment to the network that is connected to the first user equipment; the eighth indication information is used to indicate that the first user equipment needs to discover and support the non-3GPP access technology and the The first user equipment performs relaying of the connected evolved user equipment to the network.
  • information of 1 bit or two bits may be set in the PC5 discovery message, where the information of the two bits is used to indicate that the first user equipment needs to be found.
  • the PC5 discovery message includes, but is not limited to, a UE-to-Network Relay discovery request message.
  • Table 3 is the content of the UE-to-Network Relay Discovery Request message, and one or two new information is defined by occupying 1 bit or 2 bits in the Spare information in Table 3 (ie, a seventh indication information and an eighth indication information, where the newly defined two new information are used to indicate that the first user equipment needs to discover an evolved user that supports the connection with the first user equipment by using a side link.
  • the new discovery message sent by the first user equipment is new.
  • the value of the corresponding information bit defined is set to "1".
  • the eRelay UE that supports the Layer-2Relay After receiving the discovery message sent by the first user equipment, the eRelay UE that supports the Layer-2Relay reads the value of the seventh indication information in the discovery message. If the value of the seventh indication information in the discovery message is “1”, the eRelay UE supporting the Layer-2 Relay may determine that the first user equipment needs to discover that the support is performed by using the side link and the first user equipment. The relay of the connected evolved user equipment to the network. For the same reason, when the first user equipment needs to discover the relay of the evolved user equipment to the network that is connected to the first user equipment through the non-3GPP access technology, the specific implementation manner is the same as above, and is not described here.
  • the user equipment supporting the evolved user equipment through the non-3GPP technology is also supported.
  • the first user equipment sends a third message through the side link, and the second user equipment receives the third message through the side line (ie, the first user equipment discovers through the Sidelink technology)
  • the mechanism performs discovery with the second user equipment).
  • the third message is used to indicate that the first user equipment needs to discover information that supports the relay of the evolved user equipment to the network.
  • the third message includes a discovery request message, and the discovery request message may be a UE-to-Network Relay discovery request message.
  • the information included in the discovery request message includes one of the following three situations:
  • the first user equipment when the first user equipment needs to discover a relay that supports the evolved user equipment connected to the first user equipment through the side link, the first user equipment sends the information through the side link.
  • the third message is that the second user equipment receives the third message through the side link (that is, the first user equipment discovers with the second user equipment through the discovery mechanism of the Sidelink technology).
  • the third message is used to indicate that the first user equipment needs to discover information that supports the relay of the evolved user equipment to the network.
  • the third message includes a discovery request message, and the discovery request message may be a UE-to-Network Relay discovery request message.
  • the information included in the discovery request message includes the following two cases. one of them:
  • the first user equipment when the first user equipment needs to discover a relay that supports an evolved user equipment to the network connected by the first user equipment through a non-3GPP technology, the first user equipment sends the information through the non-3GPP interface.
  • the third message the second user equipment receives the third message through the non-3GPP interface (ie, the first user equipment discovers with the second user equipment through the discovery mechanism of the Sidelink technology).
  • the third message is used to indicate that the first user equipment needs to discover information that supports the relay of the evolved user equipment to the network.
  • the third message includes a discovery request message, and the discovery request message may be a UE-to-Network Relay discovery request message.
  • the information included in the discovery request message includes one of the following two situations:
  • the first user equipment and the second user equipment configure an adaptation layer, and an adaptation layer of the second user equipment generates an adaptation layer protocol data unit (PDU), the adaptation layer
  • the PDU includes a fifth indication information and the first message, where the fifth indication information is used to indicate that the adaptation layer PDU includes the first message; and an adaptation layer of the second user equipment is configured by using a non-3GPP interface
  • the first user equipment sends the adaptation layer PDU; the adaptation layer of the first user equipment receives the adaptation layer PDU sent by the first user equipment by using a non-3GPP interface.
  • the second user equipment when the second user equipment supports the Layer-2 Relay based on WLAN or Bluetooth technology, the second user equipment sends a Discovery message of the PC5 through the corresponding WLAN or Bluetooth technology.
  • the protocol stack architecture for transmitting the Discovery message of PC5 through the PC5 interface is shown in Figure 6.
  • the newly defined protocol stack architecture for transmitting the discovery message of PC5 through non-3GPP technology such as WLAN or Bluetooth is as shown in FIG. 7.
  • the function of the adaptation layer of the second user equipment is: after receiving the Discovery message sent by the ProSe Protocol layer, adding an indication information (ie, the fifth indication information) before the Discovery message to An adaptation layer PDU is formed, and the fifth indication information is used to indicate that the content after the fifth indication information is a PC5Discovery message.
  • the adaptation layer of the first user equipment can know that the payload included in the adaptation layer PDU is a PC5Discovery message according to the indication information in the adaptation layer PDU, so that the Discovery message can be forwarded. Submit to the adjacent protocol layer.
  • the first message is an RRC message.
  • the RRC message includes related system information of a serving cell where the second user equipment is located; or the RRC message includes fourth indication information, where the fourth indication information is used. Instructing the second user equipment to support an evolved user equipment to a relay function of the network; or the RRC message may be an RRC message that does not contain any content.
  • the second user equipment if the second user equipment supports the relayed user equipment to the network relay function connected to the first user equipment by using the Sidelink technology, the second user equipment needs to send a communication mechanism through the Sidelink technology.
  • the RRC message indicates that it supports the relayed user equipment to network relay function of the first user equipment through the Sidelink technology.
  • the second user equipment if the second user equipment supports the evolved user equipment to the network relay function connected to the first user equipment through the non-3GPP technology, the second user equipment needs to send an RRC through the communication mechanism of the non-3GPP technology.
  • the message indicates that it supports the relayed user equipment to network relay function of the first user equipment connected through the non-3GPP technology.
  • the RRC message may be an RRC message that does not contain any content; or the RRC message may be an RRC message including related system information of the serving cell where the second user equipment is located, and the related system information is, for example, a Tracking Area Code, a cell. Identification information, etc., the cell identity information may be a physical identifier (PCI, Physical Cell ID) of the cell, or a cell identity (Cell Identity) capable of uniquely identifying a cell in one PLMN, or a cell identifier (Cell) that is globally unique to the cell (Cell)
  • the RRC message may be an RRC message including one bit of indication information, and the indication information of the one bit is used to indicate that the second user equipment supports connection through the Sidelink technology or through the non-3GPP technology. Connected Layer-2Relay.
  • the second user equipment when the first user equipment supports the connection of the evolved user equipment to the second user equipment of the relay function of the network by the Sidelink technology, the second user equipment sends the RRC message to the first user by using the Sidelink technology.
  • the first user equipment receives the RRC message sent by the second user equipment by using the Sidelink technology.
  • the RRC message is an RRC message in Embodiment G.
  • the second user equipment when the first user equipment supports the connection of the second user equipment supporting the evolved user equipment to the relay function of the network by the non-3GPP technology, the second user equipment is sent by the non-3GPP technology.
  • the RRC message is sent to the first user equipment; the first user equipment receives the RRC message sent by the second user equipment by using the non-3GPP technology.
  • the RRC message is an RRC message in Embodiment G.
  • the first user equipment and the second user equipment respectively configure a peer-to-peer RRC layer, and when the first user equipment and the second user equipment adopt a PC5 technology-based device-to-device communication mechanism, correspondingly
  • the protocol stack is shown in Figure 8.
  • a device-to-device communication mechanism based on non-3GPP technology such as WLAN or Bluetooth is adopted between the first user equipment and the second user equipment, the corresponding protocol stack is as shown in FIG. 9.
  • the function of the adaptation layer of the second user equipment is: after receiving the RRC message sent by the RRC layer of the second user equipment, adding an indication information before the RRC message to form an adaptation layer PDU.
  • the indication information is used to indicate that the content after the indication information is an RRC message.
  • the adaptation layer of the first user equipment can know that the payload included in the adaptation layer PDU is an RRC message according to the indication information in the adaptation layer PDU, so that the RRC message can be Submitted to the RRC layer.
  • the second user equipment If the second user equipment supports the Layer 2 Relay based on the PC5 technology, the second user equipment broadcasts an RRC message through the PC5 technology broadcast. After receiving the RRC message by the PC5 technology, the first user equipment can know that the second user equipment that sends the RRC message can support the Layer 2 Relay based on the PC5 technology. Similarly, if the second user equipment supports the Layer 2 Relay of the WLAN technology, the second user equipment broadcasts an RRC message through the WLAN technology. After receiving the RRC message by using the WLAN technology, the first user equipment can know that the second user equipment that sends the RRC message can support the Layer 2 Relay based on the WLAN technology. Similarly, if the Layer 2 Relay of the second user equipment supporting Bluetooth technology is the same as the above two cases, it will not be described here.
  • the UE may send an RRC message by using the PC5 technology if the PC5 technology layer 2 relays. After receiving the RRC message by the PC5 technology, the first user equipment can know that the UE that sends the RRC message can support the Layer 2 Relay based on the PC5 technology. Similarly, if the UE supports the Layer 2 Relay of the WLAN technology and the layer 2 Relay of the UE supporting the Bluetooth technology is the same as the above, it will not be described here.
  • the first user equipment may send an RRC message by using the PC5/WLAN/Bluetooth technology, and query the UE by using the RRC message.
  • the RRC message is used to query whether the UE can provide the Layer-2 Relay function support based on the non-3GPP access technology for the first user equipment.
  • the UE supporting the Layer-2 Relay When the UE supporting the Layer-2 Relay receives the RRC message sent by the first user equipment, the UE responds by replying to an RRC message by using the PC5/WLAN/Bluetooth technology, and notifies the first user equipment by using the RRC message.
  • the Layer-2 Relay function support is provided, or, more specifically, the first user equipment is notified by the RRC message that the Layer-2 Relay function support based on the non-3GPP access technology can be provided.
  • the first user equipment After the first user equipment sends the RRC message for the query, if the RRC response message that the UE replies is not received within the time length T, the first user equipment may consider that the UE does not support the Layer.
  • the -2Relay function or the UE does not support the Layer-2 Relay function based on the non-3GPP access technology.
  • the value of the length of time T may be a predefined value or a value customized by the first user equipment.
  • the second user equipment when the second user equipment supports the evolved user equipment to the network relay function connected to the first user equipment by the Sidelink technology, the second user equipment needs to be sent by the main system sent by the Sidelink technology.
  • the information block (ie, the MIB-SL) message includes an indication information for indicating that the second user equipment supports the evolved user equipment to the network by using the Sidelink technology to connect to the first user equipment. .
  • the second user equipment sends the discovery message by receiving a resource pool
  • the first user equipment receives the discovery message sent by the second user equipment by listening to the receiving resource pool
  • one or more new transmission resource pools and reception resource pools are defined, and these resource pools are only used to send and receive a Discovery message for discovering a second user equipment supporting Layer-2 Relay.
  • the base station may receive the Discovery message related to the Layer-2 Relay discovery in the new resource pool that the base station broadcasts through the system information.
  • the transmission resource pool network device used for the Layer-2 Relay related Discovery message can decide whether to broadcast.
  • a second user equipment supporting Layer-2Relay needs to send a discovery message for Layer-2Relay UE discovery
  • the serving cell in which it is located broadcasts a transmission resource pool for transmitting a discovery message in the system information
  • the The two user equipments can directly send a discovery message in the sending resource pool.
  • the serving cell in the system broadcasts only the receiving resource pool for receiving the discovery message in the system information, and does not broadcast the sending resource pool for sending the discovery message
  • the second user equipment needs to send a request message to the network device, where The request message requests the network device for a transmission resource pool for the discovery message transmission discovered by the Layer-2 Relay UE.
  • the second user equipment may send a Discovery message in the sending resource pool configured by the network device.
  • the receiving resource pool can be monitored. When first When the user equipment receives the discovery message on the receiving resource pool, it can know that the UE that sends the discovery message supports the Layer-2 Relay.
  • the second message includes first configuration information of the first user equipment and second configuration information of the second user equipment.
  • the second user equipment and the first user equipment in the coverage of the cell receive the configuration information for the layer 2 relay from the current serving cell, the second user equipment and the first user equipment may know that the serving cell supports the Layer-2 Relay. .
  • the cell broadcasts a system message (for example, SIB19 defined in the current protocol or a newly defined system information specific to the evolved user equipment to network operation), and includes one in the system message.
  • a system message for example, SIB19 defined in the current protocol or a newly defined system information specific to the evolved user equipment to network operation
  • Configuration information for Layer-2Relay includes configuration information for the second user equipment supporting the Layer-2 Relay, and configuration information for the first user equipment supporting the Layer-2 Relay.
  • the second configuration information includes a first threshold, where the first threshold is used to indicate that the second user equipment may not be used when the RSRP of the Uu link is higher than the first threshold.
  • the first user equipment sends the first message. That is, for the second user equipment, the second configuration information includes the reference signal receiving power (RSRP) on the Uu link that the second user equipment can send the discovery message for the Layer-2 Relay discovery needs to satisfy.
  • RSRP reference signal receiving power
  • a threshold ie, the first threshold.
  • the second user equipment can send the discovery message for Layer-2Relay discovery only when the RSRP of the Uu link of the second user equipment is higher than the threshold.
  • the first configuration information includes at least one of the following: 1) a second threshold, the second The threshold is used to indicate that the first user equipment can send the third message when the RSRP of the Uu link is lower than the second threshold; 2) a third threshold, where the third threshold is used to indicate The second user equipment can be used as a candidate evolution when the RSRP of the side link between the first user equipment and the second user equipment is higher than the third threshold. Relay of user equipment to the network.
  • the first configuration information includes one or more of the following information: 1) the first user equipment may send The RSRP on the Uu link used for the discovery solicitation message discovered by the Layer-2 Relay needs to meet a threshold (ie, the second threshold).
  • the first user equipment can send a discovery solicitation message for Layer-2Relay discovery only when the RSRP of the Uu link of the first user equipment is lower than the threshold; 2) the first user equipment and the second user equipment The RSRP on the PC5 link needs to meet a threshold (ie, the third threshold).
  • the second user equipment can serve as a candidate relay only when the value of the RSRP on the PC5 link between the first user equipment and the second user equipment is higher than the threshold.
  • the first configuration information includes at least one of the following: 1) a fourth threshold, where the fourth threshold is used for Instructing the first user equipment to perform indirect communication with the network through the second user equipment when the RSRP of the Uu link is lower than the fourth threshold; 2) a fifth threshold, where the fifth threshold is used to indicate
  • the first user equipment may use the second user equipment as a candidate evolved user when the channel quality of the non-3GPP link between the first user equipment and the second user equipment is higher than the fifth threshold. The relay of the device to the network.
  • the channel quality of the non-3GPP may be an RSRP of a non-3GPP link between the first user equipment and the second user equipment, and a reference signal reception quality (Reference Signal Received Quality, RSRQ) or Received Signal Strength Indicator (RSSI).
  • RSRQ Reference Signal Received Quality
  • RSSI Received Signal Strength Indicator
  • the first configuration information includes one or more of the following information: 1) the Remote UE can pass A threshold value (ie, a fourth threshold) that the RSRP on the Uu link that the second user equipment performs indirect communication with the network needs to satisfy.
  • the first user equipment can perform non-direct communication with the network through the second user equipment only when the RSRP of the Uu link of the first user equipment is lower than the threshold; 2) the first user equipment and the second user equipment
  • the channel quality between the WLAN link or the Bluetooth link needs to meet a threshold (ie, the fifth threshold).
  • the second user equipment can serve as a candidate evolved user equipment to the network only when the value of the channel quality on the WLAN link or the Bluetooth link between the first user equipment and the second user equipment is higher than the threshold value. Relay.
  • the second message includes ninth indication information and/or tenth indication information, where the ninth indication information is used to indicate that the network device supports an evolved user equipment connected by a sidelink to The operation of the relay of the network, the tenth indication information is used to indicate that the network device supports the operation of the relay of the evolved user equipment connected to the network through the non-3GPP interface.
  • the cell broadcasts a system message (for example, it may be SIB19 defined in the current protocol, or a newly defined system information specific to the evolved user equipment to the network operation), and the system message Indicates whether or not the Layer-2Relay operation is supported.
  • a system message for example, it may be SIB19 defined in the current protocol, or a newly defined system information specific to the evolved user equipment to the network operation
  • the system message Indicates whether or not the Layer-2Relay operation is supported.
  • the Layer-2 Relay based on PC5/sidelink technology and the Layer-2 Relay based on non-3GPP technology such as WLAN/Bluetooth are not distinguished.
  • Another example is to define two indication information, which are respectively used to indicate support for Layer 2 Relay based on PC5 technology and Layer-2 Relay to support non-3GPP technology based on WLAN/Bluetooth.
  • the cell broadcasts at least one resource pool dedicated to receiving a discovery message for Layer-2 Relay discovery, or one or more, in a broadcast message.
  • the cell explicitly indicates, in the broadcast message, a Layer-2 Relay that supports non-3GPP technologies based on WLAN and Bluetooth through an indication information.
  • the cell may also broadcast one or more resource pools dedicated to transmitting discovery messages for Layer-2 Relay discovery, or one or more receive resource pools dedicated to communicating with Layer-2 Relay UEs.
  • the remote user equipment supporting the relay user equipment that provides the Layer-2 Relay function through the Sidelink technology can enable the remote user equipment to know during the discovery process of the relay user equipment. Whether the discovered relay user equipment supports the Layer-2 Relay function, so that the remote user equipment cannot connect and communicate with the network through the relay device after establishing a connection with a relay user equipment that does not support the Layer-2 Relay function. In addition, the waste of resources caused by this process and the access delay or data communication delay of the remote user equipment can be avoided; on the other hand, the remote user equipment can be prevented from performing Layer in a cell that cannot support the Layer-2 Relay operation. -2Relay user device discovery process.
  • the remote user equipment can know whether the user equipment supports the Layer after establishing a connection with another user equipment.
  • -2Relay function to avoid the remote user equipment and one does not support Layer-2Relay function
  • the connected user equipment After the connected user equipment establishes a connection, it tries to establish a connection and communication with the network through the relay user equipment; in addition, it can avoid waste of resources caused by the process and access delay or data communication of the remote user equipment. Delay.
  • the embodiment of the present invention further provides a user equipment 1000, as shown in FIG. 10, including:
  • the receiving module 1001 is configured to receive a first message sent by the second user equipment, where the first message includes information indicating that the second user equipment supports the relaying function of the evolved user equipment to the network;
  • the receiving module 1001 is further configured to receive a second message sent by the network device, where the second message includes information indicating that the network device supports the relay of the evolved user equipment to the network, or the second message And including information indicating that the cell that the network device sends the second message supports the relay of the evolved user equipment to the network.
  • the first message is a device-to-device discovery message, or the first message is a Radio Resource Control Layer (RRC) message.
  • RRC Radio Resource Control Layer
  • the discovery message when the content type of the discovery message is the first preset value, the discovery message is an announcement message for the relayed user equipment to the network to discover the relay, or the discovery message is A response message for the relayed discovery of the evolved user equipment to the network.
  • the discovery message includes first indication information, where the first indication information is used to indicate that the second user equipment supports the relayed user equipment to the network, and/or the first The indication information is used to indicate that the second user equipment is a relay of the evolved user equipment to the network.
  • the discovery message includes second indication information and/or third indication information, where the second indication information is used to indicate that the second user equipment supports the first user by using a side link.
  • the device performs a relay function of the connected user equipment to the network, and the third indication information is used to indicate that the second user equipment supports the evolved user equipment that is connected to the first user equipment by using a non-3GPP interface.
  • the relay function of the network is used to indicate that the second user equipment supports the evolved user equipment that is connected to the first user equipment by using a non-3GPP interface.
  • the RRC message includes related system information of the serving cell where the second user equipment is located; or the RRC message includes fourth indication information, where the fourth indication information is used to indicate the second The user equipment supports the relay function of the evolved user equipment to the network.
  • the receiving module 1001 is specifically configured to:
  • the receiving module 1001 is specifically configured to:
  • the first user equipment is configured with an adaptation layer
  • the receiving module 1001 is specifically configured to:
  • an adaptation layer protocol data unit sent by the second user equipment, where the adaptation layer PDU includes fifth indication information and the first message, where the fifth indication information is used to indicate The adaptation layer PDU includes the first message.
  • the receiving module is specifically configured to:
  • the second message includes first configuration information of the first user equipment and second configuration information of the second user equipment.
  • the second configuration information includes a first threshold, where the first threshold is used to indicate that the second user equipment is allowed to be in the RSRP of the Uu link when the RSRP is higher than the first threshold.
  • the first user equipment sends the first message.
  • the first configuration information includes at least one of the following: 1) a second threshold, where the second threshold is used. And indicating that the first user equipment is allowed to send a request message for relayed user equipment to the network for relay discovery when the RSRP of the Uu link is lower than the second threshold; 2) a third threshold, The third threshold is used to indicate that the first user equipment is allowed to use the second user equipment when the RSRP of the side link between the first user equipment and the second user equipment is higher than the third threshold. Relaying of the evolved user equipment to the network as a candidate.
  • the first configuration information includes at least one of the following: 1) a fourth threshold, where the fourth threshold is used for Instructing the first user equipment to allow indirect communication with the network through the second user equipment when the RSRP of the Uu link is lower than the fourth threshold; 2) a fifth threshold, the fifth threshold is used to indicate When the channel quality of the non-3GPP link between the first user equipment and the second user equipment is higher than the fifth threshold, the first user equipment uses the second user equipment as a candidate evolved user equipment to Relay of the network.
  • each of the above modules (receiving module 1001) is used to perform the relevant steps of the above method.
  • the user device 1000 is presented in the form of a module.
  • a “module” herein may refer to an application-specific integrated circuit (ASIC), a processor and memory that executes one or more software or firmware programs, integrated logic circuits, and/or other devices that provide the above functionality.
  • ASIC application-specific integrated circuit
  • the above receiving module 1001 can be implemented by the communication interface 1203 of the computing device shown in FIG.
  • one relay user equipment and one network device inform the eRemote UE of the support of the Layer-2 Relay by the indication information, or inform the eRemote UE that the cell that sends the indication information supports the Layer-2 Relay. Therefore, after the eRemote UE establishes a connection with a relay user equipment that does not support the Layer-2 Relay function, the relay user equipment cannot establish a connection and communication with the network through the relay user equipment, and the waste of resources and the remote end caused by the process can be avoided.
  • the embodiment of the present invention further provides a network device 1100, as shown in FIG.
  • the sending module 1101 is configured to send a second message, where the second message includes information indicating that the network device supports the relay of the evolved user equipment to the network, or the second message includes the indication that the network device sends The cell of the second message supports information of the relayed user equipment to the relay of the network.
  • the second message includes first configuration information of the first user equipment and second configuration information of the second user equipment.
  • the second configuration information includes a first threshold, where the first threshold is used to indicate that the second user equipment is allowed to be in the RSRP of the Uu link when the RSRP is higher than the first threshold.
  • the first user equipment sends the first message.
  • the first configuration information includes at least one of the following: 1) a second threshold, where the second threshold is used. Instructing the first user equipment to be A request message for allowing the evolved user equipment to the network to discover the relay when the RSRP of the Uu link is lower than the second threshold; 2) a third threshold, the third threshold is used to indicate the When the RSRP of the side link between the first user equipment and the second user equipment is higher than the third threshold, the first user equipment is allowed to use the second user equipment as a candidate evolved user equipment to the network. Relay.
  • the first configuration information includes at least one of the following: 1) a fourth threshold, where the fourth threshold is used for Instructing the first user equipment to allow indirect communication with the network through the second user equipment when the RSRP of the Uu link is lower than the fourth threshold; 2) a fifth threshold, the fifth threshold is used to indicate When the channel quality of the non-3GPP link between the first user equipment and the second user equipment is higher than the fifth threshold, the first user equipment uses the second user equipment as a candidate evolved user equipment to Relay of the network.
  • network device 1100 is presented in the form of a module.
  • a “module” herein may refer to an application-specific integrated circuit (ASIC), a processor and memory that executes one or more software or firmware programs, integrated logic circuits, and/or other devices that provide the above functionality.
  • ASIC application-specific integrated circuit
  • the above transmitting module 1101 can be implemented by the communication interface 1203 of the computing device shown in FIG.
  • a network device informs the eRemote UE and the Relay UE that the cell that sends the indication information supports the Layer-2 Relay by using the indication information. Therefore, after the eRemote UE establishes a connection with a relay user equipment that does not support the Layer-2 Relay function, the relay user equipment cannot establish a connection and communication with the network through the relay user equipment, and the waste of resources and the remote end caused by the process can be avoided.
  • computer device 1200 can be implemented in the structure of FIG. 12, which includes a user device and a network device, the computing device 1200 including at least one processor 1201, at least one memory 1202, and at least one communication interface 1203.
  • the processor 1201 is connected to the memory 1202 and the communication interface 1203 via a communication bus and completes communication with each other.
  • the processor 1201 may be a general purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the above program.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the communication interface 1203 is configured to communicate with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), and the like.
  • RAN Radio Access Network
  • WLAN Wireless Local Area Networks
  • the memory 1202 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type that can store information and instructions.
  • the dynamic storage device can also be an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical disc storage, and a disc storage device. (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be Any other media accessed, but not limited to this.
  • the memory can exist independently and be connected to the processor via a bus.
  • the memory can also be integrated with the processor.
  • the memory 1202 is configured to store application code that executes the above solution, and is controlled by the processor 1201 for execution.
  • the processor 1201 is configured to execute application code stored in the memory 1202.
  • the code stored in the memory 1202 may perform the above-mentioned indication method performed by the first user equipment provided above, such as receiving a first message sent by the second user equipment, where the first message includes an indication
  • the second user equipment supports the information of the relaying function of the evolved user equipment to the network; receiving the second message sent by the network device, where the second message includes a relay indicating that the network device supports the evolved user equipment to the network
  • the information, or the second message includes information indicating that the cell that the network device sends the second message supports the relay of the evolved user equipment to the network.
  • the code stored in the memory 1202 may perform the foregoing indication method performed by the network device provided above, such as sending a second message, where the second message includes a user equipment indicating that the network device supports evolution.
  • the information of the relay to the network, or the second message includes information indicating that the network device sends the second message to support the relay of the evolved user equipment to the network.
  • one relay user equipment and one network device inform the eRemote UE of the support of the Layer-2 Relay by the indication information, or inform the eRemote UE that the cell that sends the indication information supports the Layer-2 Relay. Therefore, after the eRemote UE establishes a connection with a relay user equipment that does not support the Layer-2 Relay function, the relay user equipment cannot establish a connection and communication with the network through the relay user equipment, and the waste of resources and the remote end caused by the process can be avoided.
  • the embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium can store a program, and the program includes some or all of the steps of an indication method performed by the user equipment described in the foregoing method embodiments.
  • the embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium may store a program, and the program includes some or all of the steps of an indication method performed by the network device described in the foregoing method embodiment.
  • the disclosed apparatus may be implemented in other ways.
  • 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 may be Integrate 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 units. 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 unit may exist physically separately, 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 a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a memory. A number of instructions are included to cause a computer device (which may be a personal computer, server or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing memory includes: a U disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and the like, which can store program codes.
  • ROM Read-Only Memory
  • RAM Random Access Memory

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Abstract

本发明公开了一种指示方法，包括：第一用户设备接收第二用户设备发送的第一消息，所述第一消息中包含指示所述第二用户设备支持演进的用户设备到网络的中继功能的信息；所述第一用户设备接收网络设备发送的第二消息，所述第二消息中包含指示所述网络设备支持演进的用户设备到网络的中继的信息，或者所述第二消息中包含指示所述网络设备发送所述第二消息的小区支持演进的用户设备到网络的中继的信息。本发明实施例还提供了相关设备。采用本发明实施例可使得eRemote UE知道一个Relay UE是否支持Layer-2 Relay，以及eRemote UE知道其当前服务小区是否支持Layer-2 Relay。

Description

一种指示方法及相关设备
本申请要求于2016年11月17日递交中国专利局、申请号为201611012903.7，发明名称为“一种指示方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其涉及一种指示方法及相关设备。
背景技术
设备到设备(Device-to-Device，D2D)的通信方式，指的是发送端直接将数据发送给接收端，无需通过基站或者蜂窝网络进行中转的通信方式。D2D通信方式中一种比较特殊的方式是一个用户设备(User Equipment，UE)通过另外一个具备中继功能的用户设备与网络进行连接。通常将前者称为远程用户设备(即Remote UE)，将后者称为中继用户设备(即Relay UE，或者UE-to-Network Relay)。
在第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)Rel 13中定义了基于IP层(或者称为Layer 3)的Relay机制，即Remote UE通过一个Relay UE与网络连接和通信，Relay UE通过IP层对Remote UE和网络之间的通信数据进行转发。在基于Layer 3的Relay中，Remote UE和Relay UE之间只会通过3GPP制定的Sidelink技术进行连接和通信。采用Layer 3的Relay机制，可能无法保证业务连续性以及无法实现网络侧对Remote UE的可见，可管和可控。为了克服Layer 3Relay的不足，可以采用基于RLC层以上，PDCP层以下的数据中继方式。这也是目前LTE Rel 15中的一个研究课题。这种通过在Relay UE的RLC层以上，PDCP层以下进行数据转发的方式可以称为Layer 2UE-to-NW Relay。这种情况下，Remote UE可以称为Evolved Remote UE(即eRemote UE)，Relay UE可以称为Evolved Relay UE(即eRelay UE或者Evolved UE-to-NW Relay，演进的用户设备到网络的中继)。在基于Layer 2的Relay中，eRemote UE和eRelay UE之间除了可以采用Sidelink技术进行连接外，还可以采用非3GPP接入技术进行连接，比如WLAN和蓝牙。
当支持Layer-3Relay的小区和支持Layer-2Relay的小区共享同一个载波，并且支持Layer-3Relay的UE和支持Layer-2Relay的UE在同一个小区共存时，eRemote UE如何知道一个Relay UE是否支持Layer-2Relay，以及eRemote UE如何知道其当前服务小区是否支持Layer-2Relay是本领域亟待解决的技术问题。
发明内容
针对上述问题，本发明实施例提供一种指示方法及相关设备。
第一方面，本发明实施例提供一种指示方法，包括：
第一用户设备接收第二用户设备发送的第一消息，上述第一消息中包含指示上述第二用户设备支持演进的用户设备到网络的中继功能的信息；
上述第一用户设备接收网络设备发送的第二消息，上述第二消息中包含指示上述网络设备支持演进的用户设备到网络的中继的信息，或者上述第二消息中包含指示上述网络设 备发送上述第二消息的小区支持上述演进的用户设备到网络的中继的信息。可见，一个中继用户设备和一个网络设备通过指示信息告知eRemote UE其支持Layer-2Relay，或告知eRemote UE其发送指示信息的小区支持Layer-2Relay。从而避免了eRemote UE与一个不支持Layer-2Relay功能的中继用户设备建立连接后，无法通过该中继用户设备与网络建立连接和通信，另外还可以避免这个过程中造成的资源浪费以及远端用户设备的接入时延或数据通信时延。
在一些可行的实施方式中，上述第一消息为设备到设备间的发现消息，或者，上述第一消息为无线资源控制层(RRC)消息。当第一消息为发现消息时，可以使得远端用户设备在中继用户设备的发现过程中获知发现的中继用户设备是否支持Layer-2Relay功能，从而避免远端用户设备与一个不支持Layer-2Relay功能的中继用户设备建立连接后，无法通过该中继设备与网络进行连接和通信。当第一消息为RRC消息时，可以避免通过non-3GPP技术来发送针对Sidelink技术的发现消息。
在一些可行的实施方式中，当上述发现消息的内容类型为第一预设值时，上述发现消息是用于演进的用户设备到网络的中继发现的宣告消息，或者，上述发现消息是用于演进的用户设备到网络的中继发现的响应消息。采用该实施方式可避免占用额外的bit。
在一些可行的实施方式中，上述发现消息包括第一指示信息，上述第一指示信息用于指示上述第二用户设备支持演进的用户设备到网络的中继功能，和/或上述第一指示信息用于指示上述第二用户设备为演进的用户设备到网络的中继。对于既支持Layer-3Relay也支持Layer-2Relay的第二用户设备，第二用户设备可以只发送一条发现消息，无需分别发送针对Layer-3Rela的发现消息和Layer-2Relay的发现消息，进而节省了资源的开销。
在一些可行的实施方式中，上述发现消息包括第二指示信息和/或第三指示信息，上述第二指示信息用于指示上述第二用户设备支持通过侧行链路与上述第一用户设备进行连接的演进的用户设备到网络的中继功能，上述第三指示信息用于指示上述第二用户设备支持通过非3GPP接口与上述第一用户设备进行连接的演进的用户设备到网络的中继功能。能够明确区分第二用户设备对基于侧行链路技术的Layer-2Relay功能的支持和对基于非3GPP技术的Layer-2Relay的支持。
在一些可行的实施方式中，上述RRC消息包括上述第二用户设备所在服务小区的相关系统信息；或者，上述RRC消息包含第四指示信息，上述第四指示信息用于指示上述第二用户设备支持演进的用户设备到网络的中继功能。
在一些可行的实施方式中，上述第一用户设备接收上述第二用户设备发送的第一消息，包括：当上述第一用户设备支持与上述第二用户设备通过侧行链路连接时，上述第一用户设备通过侧行链路接收上述第二用户设备发送的第一消息；当上述第一用户设备支持与上述第二用户设备通过非3GPP接口连接时，上述第一用户设备通过非3GPP接口接收上述第二用户设备发送的第一消息。对只支持non-3GPP接口技术的第一用户设备，在不用侧行链路技术的情况下，也能获知第二用户设备是否支持Layer-2Relay功能。
在一些可行的实施方式中，上述第一用户设备接收第二用户设备发送的第一消息，包括：上述第一用户设备通过侧行链路接收上述第二用户设备发送的第一消息。对既支持侧行链路技术，也支持non-3GPP接口技术的第一用户设备，可以通过接收第二用户设备通过 侧行链路技术发送的第一消息。
在一些可行的实施方式中，上述第一用户设备配置适配层，上述第一用户设备通过非3GPP接口接收上述第二用户设备发送的第一消息，包括：
上述第一用户设备的适配层通过非3GPP接口接收上述第二用户设备发送的适配层协议数据单元(PDU)，上述适配层PDU包括第五指示信息和上述第一消息，上述第五指示信息用于指示上述适配层PDU包括上述第一消息。
在一些可行的实施方式中，上述第一用户设备接收第二用户设备发送的上述发现消息，包括：上述第一用户设备通过监听接收资源池以接收第二用户设备发送的上述发现消息，上述接收资源池用于接收演进的用户设备到网络的中继发送的设备到设备间的发现消息。通过定义专门用于Layer-2Relay发现的资源池，可以避免第一用户设备盲目接收发现消息而造成的功率浪费。
在一些可行的实施方式中，上述第二消息包括上述第一用户设备的第一配置信息和上述第二用户设备的第二配置信息。网络设备通过第一配置信息和第二配置信息，一方面可以控制第一用户设备和第二用户设备发起基于层Layer-2Relay这种方式传输数据的条件，另一方面可以隐式的指示网络设备对Layer-2Relay操作的支持。
在一些可行的实施方式中，上述第二配置信息包括第一阈值，上述第一阈值用于指示上述第二用户设备在Uu链路的RSRP高于上述第一阈值时被允许向上述第一用户设备发送第一消息。
在一些可行的实施方式中，针对通过侧行链路与上述第二用户设备连接的第一用户设备，上述第一配置信息包括以下至少一种：1)第二阈值，上述第二阈值用于指示上述第一用户设备在Uu链路的RSRP低于上述第二门限值时被允许发送用于演进的用户设备到网络的中继发现的请求消息；2)第三阈值，上述第三阈值用于指示上述第一用户设备在第一用户设备与第二用户设备之间的侧行链路的RSRP高于上述第三阈值时，被允许将上述第二用户设备作为候选的演进的用户设备到网络的中继。
在一些可行的实施方式中，针对通过非3GPP接口与上述第二用户设备连接的第一用户设备，上述第一配置信息包括以下至少一种：1)第四阈值，上述第四阈值用于指示上述第一用户设备在Uu链路的RSRP低于上述第四阈值时被允许通过第二用户设备与网络进行非直连通信；2)第五阈值，上述第五阈值用于指示上述第一用户设备在第一用户设备与第二用户设备之间的非3GPP链路的信道质量高于上述第五阈值时，将上述第二用户设备作为候选的演进的用户设备到网络的中继。
第二方面，本发明实施例提供一种指示方法，包括：
网络设备发送的第二消息，上述第二消息中包含指示上述网络设备支持演进的用户设备到网络的中继的信息，或者上述第二消息中包含指示上述网络设备发送上述第二消息的小区支持上述演进的用户设备到网络的中继的信息。可见，一个网络设备通过指示信息告知eRemote UE和Relay UE其发送指示信息的小区支持Layer-2Relay。从而避免了eRemote UE与一个不支持Layer-2Relay功能的中继用户设备建立连接后，无法通过该中继用户设备与网络建立连接和通信，另外还可以避免这个过程中造成的资源浪费以及远端用户设备的接入时延或数据通信时延。
在一些可行的实施方式中，上述第二消息包括上述第一用户设备的第一配置信息和上述第二用户设备的第二配置信息。网络设备通过第一配置信息和第二配置信息，一方面可以控制第一用户设备和第二用户设备发起基于层Layer-2Relay这种方式传输数据的条件，另一方面可以隐式的指示网络设备对Layer-2Relay操作的支持。
在一些可行的实施方式中，上述第二配置信息包括第一阈值，上述第一阈值用于指示上述第二用户设备在Uu链路的RSRP高于上述第一阈值时被允许向上述第一用户设备发送第一消息。
在一些可行的实施方式中，针对通过侧行链路与上述第二用户设备连接的第一用户设备，上述第一配置信息包括以下至少一种：1)第二阈值，上述第二阈值用于指示上述第一用户设备在Uu链路的RSRP低于上述第二门限值时被允许发送用于演进的用户设备到网络的中继发现的请求消息；2)第三阈值，上述第三阈值用于指示上述第一用户设备在第一用户设备与第二用户设备之间的侧行链路的RSRP高于上述第三阈值时，被允许将上述第二用户设备作为候选的演进的用户设备到网络的中继。
在一些可行的实施方式中，针对通过非3GPP接口与上述第二用户设备连接的第一用户设备，上述第一配置信息包括以下至少一种：1)第四阈值，上述第四阈值用于指示上述第一用户设备在Uu链路的RSRP低于上述第四阈值时被允许通过第二用户设备与网络进行非直连通信；2)第五阈值，上述第五阈值用于指示上述第一用户设备在第一用户设备与第二用户设备之间的非3GPP链路的信道质量高于上述第五阈值时，将上述第二用户设备作为候选的演进的用户设备到网络的中继。
第三方面，本发明提供一种用户设备，包含用于执行第一方面中的方法的模块。
第四方面，本发明提供一种网络设备，包含用于执行第二方面中的方法的模块。
第五方面，本发明提供一种用户设备，该用户设备中包括处理器，处理器被配置为支持该用户设备执行第一方面提供的一种指示方法中相应的功能。该用户设备还可以包括存储器，存储器用于与处理器耦合，其保存该用户设备必要的程序指令和数据。该用户设备还可以包括通信接口，用于该用户设备与其他设备或通信网络通信。
第六方面，本发明提供一种网络设备，该网络设备中包括处理器，处理器被配置为支持该网络设备执行第一方面提供的一种指示方法中相应的功能。该网络设备还可以包括存储器，存储器用于与处理器耦合，其保存该网络设备必要的程序指令和数据。该网络设备还可以包括通信接口，用于该网络设备与其他设备或通信网络通信。
第七方面，本发明提供一种计算机存储介质，用于储存为上述第五方面提供的用户设备所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
第八方面，本发明提供一种计算机存储介质，用于储存为上述第六方面提供的网络设备所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
相较于现有技术，本发明提供的方案eRemote UE可通过指示信息得知一个Relay UE和当前服务的小区是否支持Layer-2Relay。
本发明的这些方面或其他方面在以下实施例的描述中会更加简明易懂。
附图说明
为了更清楚地说明本发明实施例或背景技术中的技术方案，下面将对本发明实施例或背景技术中所需要使用的附图进行说明。
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是本发明实施例提供的一种通信构架的示意图；
图2是本发明实施例提供的一种指示方法的流程示意图；
图3a是本发明实施例提供的一种基于层二的演进的用户设备到网络的中继的用户面协议栈架构的示意图；
图3b是本发明实施例提供的一种基于层二的演进的用户设备到网络的中继的控制面协议栈架构的示意图；
图4a是本发明实施例提供的另一种基于层二的演进的用户设备到网络的中继的用户面协议栈架构的示意图；
图4b是本发明实施例提供的另一种基于层二的演进的用户设备到网络的中继的控制面协议栈架构的示意图；
图5是本发明实施例提供的一种Discovery message中包含的消息类型的格式的示意图；
图6是本发明实施例提供的一种通过PC5接口来传输PC5的Discovery message的协议栈架构的示意图；
图7是本发明实施例提供的一种通过non-3GPP技术来传输PC5的discovery message的协议栈架构的示意图；
图8是本发明实施例提供的一种基于PC5技术的设备到设备间通信机制对应的协议栈的示意图；
图9是本发明实施例提供的一种基于non-3GPP技术的设备到设备间通信机制对应的协议栈的示意图；
图10是发明实施例提供的一种用户设备的结构示意图；
图11是发明实施例提供的一种网络设备的结构示意图；
图12是发明实施例提供的一种计算机设备的结构示意图。
具体实施方式
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描述。
请参阅图1，图1是本发明实施例公开的一种网络构架的示意图。图1所示的网络构架包括第一用户设备110、第二用户设备120和网络设备130。其中，第一用户设备110为eRemote UE，第二用户设备为eRelay UE(或者可以称为演进的用户设备到网络的中继)，第一用户设备110和第二用户设备120之间的通信除了可以采用基于3GPP Sidelink/PC5技术的设备到设备间的通信机制，还可以采用基于非3GPP技术进行通信，例如WLAN和蓝牙机制。
在以下描述中，eRelay UE，evolved UE-to-NW relay以及Layer-2Relay UE含义相同。
其中，第一用户设备可以为可穿戴设备，例如智能手表、智能手环、计步器等，也可以为物联网设备。第二用户设备是一种向用户提供语音和/或数据连通性的设备，例如，具有无线连接功能的手持式设备、车载设备等。常见的终端例如包括：手机、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)等。
其中，网络设备是指网络侧的节点设备，例如，网络设备可以是蜂窝网络中接入网侧的无线接入网(Radio Access Network，RAN)设备，所谓RAN设备即是一种将终端接入到无线网络的设备，包括但不限于：演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(Base Station Controller，BSC)、基站收发台(Base Transceiver Station,BTS)、家庭基站(例如，Home evolved NodeB，或Home Node B，HNB)、基带单元(BaseBand Unit，BBU)；再如，网络设备也可以是无线局域网(Wireless Local Area Network，WLAN)中的节点设备，例如接入控制器(access controller，AC)，网关，或WIFI接入点(Access Point，AP)等。
请参见图2，图2为本发明实施例提供的一种指示方法的流程示意图，包括以下步骤：
S201、第二用户设备向第一用户设备发送第一消息；所述第一用户设备接收所述第二用户设备发送的所述第一消息；所述第一消息中包含指示所述第二用户设备支持演进的用户设备到网络的中继功能的信息。
S202、网络设备发送第二消息；所述第一用户设备接收所述网络设备发送的第二消息；以及所述第二用户设备接收所述网络设备发送的第二消息；所述第二消息中包含指示所述网络设备支持演进的用户设备到网络的中继的信息，或者所述第二消息中包含指示所述网络设备发送所述第二消息的小区支持演进的用户设备到网络的中继的信息。
其中，第二用户设备支持演进的用户设备到网络的中继功能，即第二用户设备支持通过(图3a和图3b)和/或(图4a和图4b)所示的协议栈架构为第一用户设备中继第一用户设备和网络之间的用户面数据和控制面信令。
其中，图3a和图3b是第一用户设备通过第二用户设备与网络连接，并且第一用户设备和第二用户设备之间通过Sidelink技术进行连接时，其对应的用户面和控制面的端到端协议栈。图3a是基于层二的演进的用户设备到网络的中继的用户面协议栈架构(PC5)。图3b是基于层二的演进的用户设备到网络的中继的控制面协议栈架构(PC5)。
图4a和图4b是第一用户设备通过第二用户设备与网络连接，并且第一用户设备和第二用户设备之间通过non-3GPP接入技术进行连接时，其对应的用户面和控制面的端到端协议栈。图4a是基于层二的演进的用户设备到网络的中继的用户面协议栈架构(non-3GPP access)，图4b是基于层二的演进的用户设备到网络的中继的控制面协议栈架构(non-3GPP access)。
网络设备支持演进的用户设备到网络的中继的操作，即网络设备支持一个演进的远端用户设备通过一个演进的中继用户设备与网络进行连接和进行业务数据/控制信令传输的操作。
在一实施例中，所述第一消息为基于Sidelink技术或PC5接口上的设备到设备间的发现消息(discovery message)。
在一实施例(实施例A)中，当所述发现消息的内容类型为第一预设值时，表示所述发 现消息是用于演进的用户设备到网络的中继发现的宣告消息(evolved UE-to-NW relay discovery announcement)，或者，表示所述发现消息是用于演进的用户设备到网络的中继发现的响应消息(evolved UE-to-NW relay discovery Response)。
具体地，Discovery message中包含的消息类型(Message Type)的格式如下图5所示。目前，Message Type中的内容类型(Content Type)的取值及对应的意义如表1所示。
表1
Figure PCTCN2017072875-appb-000001
本发明实施例中，利用目前Content Type中的预留值(如表1中的0011、1001～1111)中的值来定义对应的discovery message是针对evolved UE-to-NW Relay的discovery message。比如，Content Type为1001，则定义对应的discovery message表示为evolved UE-to-NW relay discovery announcement or evolved UE-to-NW relay discovery Response。
举例来说，当一个第二用户设备只支持Layer-2Relay功能时，那么第二用户设备发送的discovery message中的Message Type的Content Type的值设为1001。当第二用户设备既支持Layer-2Relay功能，也支持Layer-3Relay功能时，那么在发现过程中，第二用户设备需要发送两条discovery message，一条discovery message的中的Message Type的Content Type的值设为0100，另一条discovery message的中的Message Type的Content Type的值设为1001。
当一个希望发现Layer-2Relay的第一用户设备收到第二用户设备发送的discovery  message中的Content Type的值为1001时，第一用户设备即可以知道该第二用户设备支持Layer-2Relay功能，同时该第二用户设备的服务小区也支持Layer-2Relay操作。
在一实施例(实施例B)中，所述发现消息包括第一指示信息，所述第一指示信息用于指示所述第二用户设备支持演进的用户设备到网络的中继功能，和/或所述第一指示信息用于指示所述第二用户设备为演进的用户设备到网络的中继。其中，所述发现消息包括但不限于UE-to-Network Relay发现宣告消息，UE-to-Network Relay发现响应消息。
具体地，可以在PC5discovery message中设置一个1bit的信息(即第一指示信息)，该1bit的信息用于指示所述第二用户设备支持Layer-2Relay。
或者利用Discovery message中的Spare bit来指示支持Layer-2Relay。如表2所示，表2是UE-to-Network Relay发现宣告消息的内容，通过占用表2中的Spare信息中的1个比特来定义一个新的信息(即第一指示信息)，该新定义的信息用来指示所述第二用户设备支持Layer-2Relay。例如，如果第二用户设备支持Layer-2Relay，那么第二用户设备发送的discovery message中新定义的信息比特的值设为“1”，表示第二用户设备支持Layer-2Relay。
支持Layer-2Relay的第一用户设备收到第二用户设备发送的discovery message后，会去读取该discovery message中的第一指示信息的值。如果该discovery message中的第一指示信息的值为“1”，那么第一用户设备可以确定该第二用户设备支持Layer-2Relay。
表2
Figure PCTCN2017072875-appb-000002
在一实施例(实施例C)中，所述发现消息包括第二指示信息和/或第三指示信息，所述 第二指示信息用于指示所述第二用户设备支持通过侧行链路与所述第一用户设备进行连接的演进的用户设备到网络的中继功能；所述第三信息用于指示所述第二用户设备支持通过non-3GPP接入技术与所述第一用户设备进行连接的演进的用户设备到网络的中继功能。
具体地，通过在PC5discovery message中设置1个bit或两个bit的信息(即第二指示信息和/或第三指示信息)，这两个bit的信息分别用于指示所述第二用户设备支持通过侧行链路与所述第一用户设备进行连接的Layer-2Relay功能和通过非3GPP接入技术与所述第一用户设备进行连接的Layer-2Relay功能。该PC5discovery message包括但不限于UE-to-Network Relay发现宣告消息，UE-to-Network Relay发现响应消息。
或者利用Discovery message中的Spare bit来指示支持Layer-2Relay。如表2所示，表2是UE-to-Network Relay发现宣告消息的内容，通过占用表2中的Spare信息中的1个或2个比特来定义1个或两个新的信息(即第二指示信息和/或第三指示信息)，该新定义的两个新信息分别用于指示所述第二用户设备支持通过侧行链路与所述第一用户设备进行连接的Layer-2Relay功能和通过非3GPP接入技术与所述第一用户设备进行连接的Layer-2Relay功能。例如，如果第二用户设备支持通过侧行链路与所述第一用户设备进行连接的Layer-2Relay功能，那么该第二用户设备发送的discovery message中新定义的相应信息比特的值设为“1”。
支持Layer-2Relay的第一用户设备在收到一个第二用户设备发送的discovery message后，会去读取该discovery message中的第二指示信息的值。如果该discovery message中的第二指示信息的值为“1”，那么第一用户设备可以确定第二用户设备支持通过侧行链路与第一用户设备进行连接的Layer-2Relay功能。同理，第二用户设备支持通过非3GPP接入技术与第一用户设备进行连接的Layer-2Relay功能时，具体实现方式同上，在此不在叙述。
在一实施例中，当第二用户设备既支持通过侧行链路与第一用户设备进行连接的演进的用户设备到网络的中继功能，也支持通过non-3GPP技术与所述第一用户设备进行连接的演进的用户设备到网络的中继功能时，第二用户设备通过侧行链路发送第一消息，第一用户设备通过侧行链路接收第二用户设备发送的第一消息(即第二用户设备通过Sidelink技术的发现机制与第一用户设备进行发现)。其中，第一消息用于指示第二用户设备支持演进的用户设备到网络的中继功能的信息。第一消息包括发现消息，所述发现消息包括但不限于UE-to-Network Relay发现宣告消息，UE-to-Network Relay发现响应消息。所述发现消息包含的信息包括以下3种情况中的其中一种：
1)采用上述实施例A所述的方式和采用上述实施例C中的第三指示信息所述的方式。比如，将所述发现消息的内容类型的值设置为1001，表示第二用户设备支持通过Sidelink与所述第一用户设备进行连接的演进的用户设备到网络的中继功能。以及在所述发现消息中设置1bit的信息，或利用所述发现消息中的Spare信息中的1比特来定义一个信息，该新定义的一个信息用于指示第二用户设备支持通过非3GPP接口与所述第一用户设备进行连接的演进的用户设备到网络的中继功能。
2)采用上述实施例B所述的第一指示信息的方式。比如，在所述发现消息中设置1bit的信息，或利用所述发现消息中的Spare信息中的1比特来定义一个信息，该新定义的一个信息用于指示第二用户设备支持演进的用户设备到网络的中继功能，即既支持通过侧行 链路与所述第一用户设备进行连接的演进的用户设备到网络的中继功能。也支持通过non-3GPP接口与所述第一用户设备进行连接的演进的用户设备到网络的中继功能。
3)采用上述实施例C所述的第二指示信息和第三指示信息所述的方式。比如，在所述发现消息中设置2bit的信息，或利用所述发现消息中的Spare信息中的2比特来定义两个信息，该新定义的两个信息分别用于指示第二用户设备支持通过Sidelink与所述第一用户设备进行连接的演进的用户设备到网络的中继功能和用于指示第二用户设备支持通过非3GPP接口与所述第一用户设备进行连接的演进的用户设备到网络的中继功能。
在一实施例中，当第二用户设备支持通过侧行链路与所述第一用户设备进行连接的演进的用户设备到网络的中继功能时，第二用户设备通过侧行链路发送第一消息，第一用户设备通过侧行链路接收第二用户设备发送的第一消息(即第二用户设备通过Sidelink技术的发现机制与第一用户设备进行发现)。其中，第一消息用于指示第二用户设备支持演进的用户设备到网络的中继功能的信息。第一消息包括发现消息，所述发现消息包括但不限于UE-to-Network Relay发现宣告消息，UE-to-Network Relay发现响应消息。所述发现消息包含的消息包括以下2种情况中的其中一种：
1)采用上述实施例A所述的方式。具体情况详见实施例A，在此不再叙述。
2)采用上述实施例C所述的第二指示信息所述的方式。具体情况详见实施例C，在此不再叙述。
在一实施例中，当第二用户设备支持通过非3GPP技术与第一用户设备进行连接的演进的用户设备到网络的中继功能时，第二用户设备通过非3GPP接口发送第一消息，第一用户设备通过non-3GPP接口接收第二用户设备发送的第一消息(即第二用户设备在通过non-3GPP技术的发现机制与第一用户设备进行发现)。其中，第一消息用于指示第二用户设备支持演进的用户设备到网络的中继功能的信息。第一消息包括发现消息，所述发现消息包括但不限于UE-to-Network Relay发现宣告消息，UE-to-Network Relay发现响应消息。所述发现消息包含的消息包括以下2种情况中的其中一种：
1)采用上述实施例A所述的方式。具体情况详见实施例A，在此不再叙述。
2)采用上述实施例C所述的第三指示信息所述的方式。具体情况详见实施例C，在此不再叙述。
在一实施例中，图2所示的方法还包括：
所述第一用户设备发送第三消息，所述第三消息中包含指示所述第一用户设备需要发现演进的用户设备到网络的中继的信息。
在一实施例中，所述第三消息为设备到设备间的发现请求消息(discovery solicitation message)。
在一实施例中(实施例D)，当所述发现请求消息的内容类型为第二预设值时，所述发现请求消息是用于演进的用户设备到网络的中继发现的请求消息(evolved UE-to-Network Relay Discovery Solicitation)。
当一个支持Layer-2relay的第一用户设备想要发现一个支持Layer-2Relay的eRelay UE时，将第一用户设备发送的discovery solicitation message中的Message Type的Content Type的值设为1010。当一个支持Layer-2Relay的eRelay UE收到第一用户设备发送的discovery  solicitation message时，如果该discovery solicitation message中的Message Type的Content Type的值为1010，eRelay UE可以知道该第一用户设备需要发现一个支持Layer-2Relay的eRelay UE。
在一实施例中(实施例E)，所述发现请求消息包括第六指示信息，所述第六指示信息用于指示所述第一用户设备需要发现演进的用户设备到网络的中继。
具体地，可以在PC5discovery message中设置一个bit的信息(即第六指示信息)，该1bit的信息用于指示所述第一用户设备需要发现支持Layer-2Relay的eRelay UE。所述PC5discovery message包括但不限于UE-to-Network Relay发现请求消息。
或者利用Discovery message中的Spare bit来指示第一用户设备需要发现支持Layer-2Relay的eRelay UE。如表3所示，表3是UE-to-Network Relay发现请求消息的内容，通过占用表3中的Spare信息中的1个比特来定义一个新的信息(即第六指示信息)，该新定义的信息用来指示第一用户设备需要发现支持Layer-2Relay的eRelay UE。例如，如果第一用户设备需要发现支持Layer-2Relay的eRelay UE，那么第一用户设备发送的discovery message中新定义的信息比特的值设为“1”，表示该第一用户设备需要发现支持Layer-2Relay的eRelay UE。一个支持Layer-2Relay的eRelay UE在收到一个第一用户设备发送的discovery message后，会去读取该discovery message中的所述第六指示信息的值。如果该discovery message中的所述第六指示信息的值为“1”，那么这个支持Layer-2Relay的eRelay UE可以确定该第一用户设备需要发现支持层二功能的Relay UE。
表3
Figure PCTCN2017072875-appb-000003
在一实施例中(实施例F)，所述发现请求消息包括第七指示信息和/或第八指示信息，所述第七指示信息用于指示所述第一用户设备需要发现支持通过侧行链路与所述第一用户设备进行连接的演进的用户设备到网络的中继；所述第八指示信息用于指示所述第一用户设备需要发现支持通过non-3GPP接入技术与所述第一用户设备进行连接的演进的用户设备到网络的中继。
具体地，可以在PC5discovery message中设置1bit个或两个bit的信息(即第七指示信息和/或第八指示信息)，这两个bit的信息分别用于指示所述第一用户设备需要发现支持通过侧行链路与所述第一用户设备进行连接的演进的用户设备到网络的中继，和支持通过非3GPP接入技术与所述第一用户设备进行连接的演进的用户设备到网络的中继。所述PC5discovery message包括但不限于UE-to-Network Relay发现请求消息。
或者利用Discovery message中的1个Spare bit或两个Spare bit来指示需要发现支持Layer-2Relay的eRelay UE。如表3所示，表3是UE-to-Network Relay发现请求消息的内容，通过占用表3中的Spare信息中的1个比特或2个比特来定义1个或两个新的信息(即第七指示信息和第八指示信息)，该新定义的两个新信息分别用于指示所述第一用户设备需要发现支持通过侧行链路与所述第一用户设备进行连接的演进的用户设备到网络的中继和需要发现支持通过non-3G PP接入技术与所述第一用户设备进行连接的演进的用户设备到网络的中继。例如，如果第一用户设备需要发现支持通过侧行链路与所述第一用户设备进行连接的演进的用户设备到网络的中继，那么第一用户设备发送的discovery message中新 定义的相应信息比特的值设为“1”。一个支持Layer-2Relay的eRelay UE在收到第一用户设备发送的discovery message后，会去读取该discovery message中的所述第七指示信息的值。如果该discovery message中的所述第七指示信息的值为“1”，那么这个支持Layer-2Relay的eRelay UE可以确定第一用户设备需要发现支持通过侧行链路与所述第一用户设备进行连接的演进的用户设备到网络的中继。同理，第一用户设备需要发现支持通过non-3GPP接入技术与所述第一用户设备进行连接的演进的用户设备到网络的中继时，具体实现方式同上，在此不再叙述。
在一实施例中，当第一用户设备既支持通过侧行链路与支持演进的用户设备到网络的中继功能的用户设备的连接，也支持通过non-3GPP技术与支持演进的用户设备到网络的中继功能的用户设备的连接时，第一用户设备通过侧行链路发送第三消息，第二用户设备通过侧行链路接收第三消息(即第一用户设备通过Sidelink技术的发现机制与第二用户设备进行发现)。其中，第三消息用于指示第一用户设备需要发现支持演进的用户设备到网络的中继的信息。第三消息包括发现请求消息，所述发现请求消息可以是UE-to-Network Relay发现请求消息。所述发现请求消息包含的信息包括以下3种情况中的其中一种：
1)采用上述实施例D所述的方式和采用上述实施例F中的第八指示信息所述的方式。比如，将所述发现请求消息的内容类型的值设置为1010，表示第一用户设备需要发现支持通过Sidelink与所述第一用户设备进行连接的演进的用户设备到网络的中继。以及在所述发现请求消息中设置1bit的信息，或利用所述发现请求消息中的Spare信息中的1比特来定义一个信息，该新定义的一个信息用于指示第一用户设备需要发现支持通过non-3GPP接口与所述第一用户设备进行连接的演进的用户设备到网络的中继。
2)采用上述实施例E所述的第六指示信息的方式。比如，在所述发现请求消息中设置1bit的信息，或利用所述发现请求消息中的Spare信息中的1比特来定义一个信息，该新定义的一个信息用于指示第一用户设备需要发现支持演进的用户设备到网络的中继功能的用户设备，即既可以为支持通过侧行链路与所述第一用户设备进行连接的演进的用户设备到网络的中继，也可以为支持通过non-3GPP接入技术与所述第一用户设备进行连接的演进的用户设备到网络的中继。
3)采用上述实施例F所述的第七指示信息和第八指示信息所述的方式。比如，在所述发现请求消息中设置2bit的信息，或利用所述发现请求消息中的Spare信息中的2比特来定义两个信息，该新定义的两个信息分别用于指示第一用户设备需要发现支持通过侧行链路与所述第一用户设备进行连接的演进的用户设备到网络的中继和用于指示第一用户设备需要发现支持通过non-3GPP接口与所述第一用户设备进行连接的演进的用户设备到网络的中继。
在一实施例中，当第一用户设备需要发现支持通过侧行链路与所述第一用户设备进行连接的演进的用户设备到网络的中继时，第一用户设备通过侧行链路发送第三消息，第二用户设备通过侧行链路接收第三消息(即第一用户设备通过Sidelink技术的发现机制与第二用户设备进行发现)。其中，第三消息用于指示第一用户设备需要发现支持演进的用户设备到网络的中继的信息。第三消息包括发现请求消息，所述发现请求消息可以是UE-to-Network Relay发现请求消息。所述发现请求消息包含的信息包括以下2种情况中的 其中一种：
1)采用上述实施例D所述的方式。具体情况详见实施例A，在此不再叙述。
2)采用上述实施例F所述的第八指示信息所述的方式。具体情况详见实施例F，在此不再叙述。
在一实施例中，当第一用户设备需要发现支持通过non-3GPP技术与所述第一用户设备进行连接的演进的用户设备到网络的中继时，第一用户设备通过non-3GPP接口发送第三消息，第二用户设备通过non-3GPP接口接收第三消息(即第一用户设备通过Sidelink技术的发现机制与第二用户设备进行发现)。其中，第三消息用于指示第一用户设备需要发现支持演进的用户设备到网络的中继的信息。第三消息包括发现请求消息，所述发现请求消息可以是UE-to-Network Relay发现请求消息。所述发现请求消息包含的信息包括以下2种情况中的其中一种：
1)采用上述实施例D所述的方式。具体情况详见实施例A，在此不再叙述。
2)采用上述实施例F所述的第八指示信息所述的方式。具体情况详见实施例F，在此不再叙述。
在一实施例中，所述第一用户设备和所述第二用户设备配置适配层，所述第二用户设备的适配层生成适配层协议数据单元(PDU)，所述适配层PDU包括第五指示信息和所述第一消息，所述第五指示信息用于指示所述适配层PDU包括所述第一消息；所述第二用户设备的适配层通过非3GPP接口向所述第一用户设备发送所述适配层PDU；所述第一用户设备的适配层通过非3GPP接口接收所述第一用户设备发送的所述适配层PDU。
具体地，当第二用户设备支持基于WLAN或者蓝牙技术的Layer-2Relay时，第二用户设备通过相应的WLAN或者蓝牙技术发送一个PC5的Discovery message。为了能够通过WLAN或者蓝牙传输该Discovery message，需要定义新的传输PC5的Discovery message的协议栈架构。目前通过PC5接口来传输PC5的Discovery message的协议栈架构如图6所示。通过WLAN或者蓝牙等non-3GPP技术来传输PC5的discovery message新定义的协议栈架构如图7所示。
第二用户设备的适配层(Adaptation layer)的作用是当收到邻近协议层(ProSe Protocol layer)发送的Discovery message后，在该Discovery message前增加一个指示信息(即第五指示信息)，以组成适配层PDU(Adaptation layer PDU)，第五指示信息用于指示第五指示信息之后的内容为PC5Discovery message。第一用户设备的适配层收到该适配层PDU后，根据适配层PDU中的指示信息，可以知道该适配层PDU中包含的净荷为PC5Discovery message，从而可以将Discovery message往上递交给邻近协议层。
在一实施例中，所述第一消息为RRC消息。
在一实施例中(实施例G)，所述RRC消息包含所述第二用户设备所在服务小区的相关系统信息；或者，所述RRC消息包含第四指示信息，所述第四指示信息用于指示所述第二用户设备支持演进的用户设备到网络的中继功能；或者，所述RRC消息可以是不包含任何内容的RRC消息。
具体地，如果第二用户设备支持通过Sidelink技术与第一用户设备进行连接的演进的用户设备到网络的中继功能时，该第二用户设备需要通过Sidelink技术的通信机制发送一 条RRC消息来指示其支持通过Sidelink技术与所述第一用户设备进行连接的演进的用户设备到网络的中继功能。同样，如果第二用户设备支持通过non-3GPP技术与第一用户设备进行连接的演进的用户设备到网络的中继功能时，该第二用户设备需要通过non-3GPP技术的通信机制发送一条RRC消息来指示其支持通过non-3GPP技术与第一用户设备进行连接的演进的用户设备到网络的中继功能。
所述RRC消息可以是不包含任何内容的RRC消息；或者，所述RRC消息可以是包含有这个第二用户设备所在服务小区的相关系统信息的RRC消息，相关系统信息例如有Tracking Area Code，小区标识信息等，所述小区标识信息可以为小区的物理标识(PCI,Physical cell ID)或者是能够在一个PLMN中唯一识别小区的小区标识(Cell Identity),或者是小区全球唯一的小区标识(Cell global identity,CGI)；或者，所述RRC消息可以是包含一个bit的指示信息的RRC消息，这一个bit的指示信息用于指示所述第二用户设备支持通过Sidelink技术连接或者通过non-3GPP技术连接的Layer-2Relay。
在一实施例中，当第一用户设备支持通过Sidelink技术与支持演进的用户设备到网络的中继功能的第二用户设备的连接时，第二用户设备通过Sidelink技术发送RRC消息给第一用户设备；第一用户设备通过Sidelink技术接收第二用户设备发送的RRC消息。所述RRC消息为实施例G中的RRC消息。
在一实施例中，当第一用户设备支持通过non-3GPP技术与所述支持演进的用户设备到网络的中继功能的第二用户设备的连接时，第二用户设备通过non-3GPP技术发送RRC消息给第一用户设备；第一用户设备通过non-3GPP技术接收第二用户设备发送的RRC消息。所述RRC消息为实施例G中的RRC消息。
在一实施例中，第一用户设备和第二用户设备分别配置一个对等的RRC层，当第一用户设备和第二用户设备之间采用基于PC5技术的设备到设备间通信机制时，相应的协议栈如下图8所示。当第一用户设备和第二用户设备之间采用基于WLAN或蓝牙等non-3GPP技术的设备到设备间通信机制时，相应的协议栈如下图9所示。
其中，第二用户设备的适配层的作用是当收到第二用户设备的RRC层发送的RRC消息(RRC message)后，在该RRC message前增加一个指示信息，以组成适配层PDU，该指示信息用于指示该指示信息之后的内容为RRC message。第一用户设备的适配层收到该适配层PDU后，根据该适配层PDU中的指示信息，可以知道该适配层PDU中包含的净荷为RRC message，从而可以将RRC message往上递交给RRC层。
如果第二用户设备支持基于PC5技术的层二Relay，第二用户设备通过PC5技术广播发送一个RRC message。第一用户设备通过PC5技术接收到该RRC message后即可以知道发送该RRC message的第二用户设备可以支持基于PC5技术的层二Relay。同理，如果第二用户设备支持WLAN技术的层二Relay，第二用户设备通过WLAN技术广播发送一个RRC message。第一用户设备通过WLAN技术接收到该RRC message后即可以知道发送该RRC message的第二用户设备可以支持基于WLAN技术的层二Relay。同理，如果第二用户设备支持蓝牙技术的层二Relay跟上述两种情况相同，在此不再叙述。
或者当第一用户设备和一个UE通过基于PC5/WLAN/蓝牙技术互相发现，并建立连接后，所述UE如果PC5技术层二Relay，所述UE可以通过PC5技术发送一个RRC message， 第一用户设备通过PC5技术接收到该RRC message后，即可以知道发送该RRC message的UE可以支持基于PC5技术的层二Relay。同理，如果所述UE支持WLAN技术的层二Relay和所述UE支持蓝牙技术的层二Relay跟上述情况相同，在此不再叙述。
或者当第一用户设备和一个UE通过PC5/WLAN/蓝牙技术互相发现，并建立连接后，第一用户设备可以通过PC5/WLAN/蓝牙技术发送一个RRC message，通过所述RRC消息询问所述UE是否可以为所述第一用户设备提供Layer-2Relay功能支持。或者，更具体的，通过所述RRC消息询问所述UE是否可以为所述第一用户设备提供基于non-3GPP接入技术的Layer-2Relay功能支持。当一个支持Layer-2Relay的UE收到该第一用户设备发送的RRC message时,所述UE通过PC5/WLAN/蓝牙技术回复一个RRC消息做为响应，通过这一个RRC消息通知第一用户设备可以提供Layer-2Relay功能支持，或者，更具体的，通过这一个RRC消息通知所述第一用户设备可以提供基于non-3GPP接入技术的Layer-2Relay功能支持。所述第一用户设备在发送所述用于询问的RRC消息后，如果在时间长度T内，没有收到所述UE回复的RRC响应消息，那么第一用户设备可以认为所述UE不支持Layer-2Relay功能，或者，所述UE不支持基于non-3GPP接入技术的Layer-2Relay功能。所述时间长度T的值可以为预定义的一个值，或者由第一用户设备自定义的一个值。
在一实施例中，当第二用户设备支持通过Sidelink技术与所述第一用户设备进行连接的演进的用户设备到网络的中继功能时，第二用户设备需要在通过Sidelink技术发送的主系统信息块(即MIB-SL，Master Information Block)消息中包含一个指示信息，用于指示第二用户设备支持通过Sidelink技术与所述第一用户设备进行连接的演进的用户设备到网络的中继功能。
在一实施例中，第二用户设备通过接收资源池发送所述发现消息，所述第一用户设备通过监听接收资源池以接收第二用户设备发送的所述发现消息。
具体地，定义一个或多个新的发送资源池和接收资源池，这些资源池只用来发送和接收用于发现支持Layer-2Relay的第二用户设备的Discovery message。对于处于小区覆盖范围外的第一用户设备，其可以用预先配置的新的资源池来发送或接收Layer-2Relay相关的Discovery message。对于处于小区覆盖范围内的第一用户设备或者第二用户设备，其可以在基站通过系统信息广播的所述新的资源池中来接收Layer-2Relay发现相关的Discovery message。另外，用于Layer-2Relay相关的Discovery message的发送资源池网络设备可以决定是否广播。
当一个支持Layer-2Relay的第二用户设备需要发送用于Layer-2Relay UE发现的discovery message时，如果其所在的服务小区在系统信息里面广播了用于发送discovery message的发送资源池，那么该第二用户设备可以直接在该发送资源池中发送discovery message。如果所在的服务小区在系统信息里面只广播了用于接收discovery message的接收资源池，而没有广播用于发送discovery message的发送资源池，那么第二用户设备需要向网络设备发送一个请求消息，该请求消息向网络设备请求用于Layer-2Relay UE发现的discovery message传输的发送资源池。后续如果网络设备为第二用户设备配置了发送资源池，第二用户设备可以在该网络设备配置的发送资源池中发送Discovery message。相应的，当第一用户设备需要发现支持Layer-2Relay的UE时，可以监听所述接收资源池。当第一 用户设备在所述接收资源池上收到该discovery message时，即可以知道发送该discovery message的UE支持Layer-2Relay。
在一实施例中，所述第二消息包括所述第一用户设备的第一配置信息和所述第二用户设备的第二配置信息。
当第二用户设备和处于小区覆盖范围内的第一用户设备从当前的服务小区接收到针对层二Relay的配置信息时，第二用户设备和第一用户设备可以知道该服务小区支持Layer-2Relay。
如果一个小区支持Layer-2Relay，该小区广播一个系统消息(例如，目前协议中定义的SIB19或者一个新定义的专门针对演进的用户设备到网络操作的系统信息)，并且在该系统消息中包含一个针对Layer-2Relay的配置信息。该配置信息包含针对支持Layer-2Relay的第二用户设备的配置信息，以及针对支持Layer-2Relay的第一用户设备的配置信息。
在一实施例中，所述第二配置信息包括第一阈值，所述第一阈值用于指示所述第二用户设备在Uu链路的RSRP高于所述第一阈值时才可以向所述第一用户设备发送第一消息。也就是说，对于第二用户设备，第二配置信息包括第二用户设备可以发送用于Layer-2Relay发现的discovery message的Uu链路上的参考信号接收功率(Reference Signal Receiving Power，RSRP)需要满足一个门限值(即第一阈值)。只有当第二用户设备的Uu链路的RSRP高于该门限值时，第二用户设备才可以发送用于Layer-2Relay发现的discovery message。
在一实施例中，针对通过侧行链路与所述第二用户设备连接的所述第一用户设备，所述第一配置信息包括以下至少一种：1)第二阈值，所述第二阈值用于指示所述第一用户设备在Uu链路的RSRP低于所述第二门限值时才可以发送所述第三消息；2)第三阈值，所述第三阈值用于指示所述第一用户设备在所述第一用户设备与所述第二用户设备之间的侧行链路的RSRP高于所述第三阈值时，才可以将所述第二用户设备作为候选的演进的用户设备到网络的中继。
也就是说，对于第一用户设备，当第一用户设备采用基于PC5的设备到设备间的通信时，第一配置信息包含下述信息中的一个或多个：1)第一用户设备可以发送用于Layer-2Relay发现的discovery solicitation message的Uu链路上的RSRP需要满足的一个门限值(即第二阈值)。只有当第一用户设备的Uu链路的RSRP低于该门限值时，第一用户设备才可以发送用于Layer-2Relay发现的discovery solicitation message；2)第一用户设备和第二用户设备之间的PC5链路上的RSRP需要满足一个门限值(即第三阈值)。只有当第一用户设备与第二用户设备之间的PC5链路上的RSRP的值高于该门限值时，该第二用户设备才可以作为候选中继。
在一实施例中，针对通过非3GPP接口与所述第二用户设备连接的第一用户设备，所述第一配置信息包括以下至少一种：1)第四阈值，所述第四阈值用于指示所述第一用户设备在Uu链路的RSRP低于所述第四阈值时才可以通过第二用户设备与网络进行非直连通信；2)第五阈值，所述第五阈值用于指示所述第一用户设备在第一用户设备与第二用户设备之间的非3GPP链路的信道质量高于所述第五阈值时，才可以将所述第二用户设备作为候选的演进的用户设备到网络的中继。所述非3GPP的信道质量可以第一用户设备和第二用户设备之间的非3GPP的链路的RSRP，参考信号接收质量(Reference Signal Received Quality, RSRQ)或者接收信号强度指示(Received Signal Strength Indicator,RSSI)。
也就是说，对于第一用户设备，当第一用户设备采用基于WLAN或蓝牙的设备到设备间的通信时，第一配置信息包含下述信息中的一个或多个：1)Remote UE可以通过第二用户设备与网络进行非直连通信的Uu链路上的RSRP需要满足的一个门限值(即第四阈值)。只有当第一用户设备的Uu链路的RSRP低于该门限值时，第一用户设备才可以通过第二用户设备与网络进行非直连通信；2)第一用户设备和第二用户设备之间的WLAN链路或蓝牙链路上的信道质量需要满足一个门限值(即第五阈值)。只有当第一用户设备与第二用户设备之间的WLAN链路或蓝牙链路上信道质量的值高于该门限值时，该第二用户设备才可以作为候选的演进的用户设备到网络的中继。
在一实施例中，所述第二消息包括第九指示信息和/或第十指示信息，所述第九指示信息用于指示所述网络设备支持通过侧行链路连接的演进的用户设备到网络的中继的操作，所述第十指示信息用于指示所述网络设备支持通过非3GPP接口连接的演进的用户设备到网络的中继的操作。
如果一个小区支持Layer-2Relay，该小区广播一个系统消息(例如，可以为目前协议中定义的SIB19，或者一个新定义的专门针对演进的用户设备到网络操作的系统信息)，并且在该系统消息中显示的包含是否支持Layer-2Relay操作的指示。例如，只定义一个指示信息，不区分基于PC5/sidelink技术的Layer-2Relay和基于WLAN/蓝牙等非3GPP技术的Layer-2Relay。又如定义两个指示信息，分别用于指示支持基于PC5技术的Layer-2Relay和支持基于WLAN/蓝牙等非3GPP技术的Layer-2Relay。
在一实施例中，如果一个小区支持基于Sidelink技术的Layer-2Relay，该小区至少在广播消息中广播一个或多个专门用于接收针对Layer-2Relay发现的discovery message的资源池，或者一个或多个专门用于与Layer-2Relay UE通信的接收资源池。可选的，如果一个小区广播了所述接收资源池，同时意味着该小区支持基于WLAN和蓝牙等non-3GPP技术的Layer-2Relay；或者，如果该小区同时支持基于WLAN和蓝牙等non-3GPP技术的Layer-2Relay，该小区在所述广播消息中通过一个指示信息来显式指示支持基于WLAN和蓝牙等非3GPP技术的Layer-2Relay。此外，该小区还可以广播一个或多个专门用于发送针对Layer-2Relay发现的discovery message的资源池，或者一个或多个专门用于与Layer-2RelayUE通信的接收资源池。
可见，在本发明实施例中，对于支持通过Sidelink技术连接一个提供Layer-2Relay功能的中继用户设备的远端用户设备，一方面可以让远端用户设备在中继用户设备的发现过程中获知发现的中继用户设备是否支持Layer-2Relay功能，从而避免所述远端用户设备与一个不支持Layer-2Relay功能的中继用户设备建立连接后，无法通过该中继设备与网络进行连接和通信；另外可以避免这个过程中造成的资源浪费以及远端用户设备的接入时延或数据通信时延；另一方面，可以避免远端用户设备在一个无法支持Layer-2Relay操作的小区中进行Layer-2Relay用户设备的发现过程。
另外，对于支持通过non-3GPP技术连接一个提供Layer-2Relay功能的中继用户设备的远端用户设备，可以让远端用户设备在与另外一个用户设备建立连接后，获知该用户设备是否支持Layer-2Relay功能，从而避免所述远端用户设备与一个不支持Layer-2Relay功 能的中继用户设备建立连接后，任然尝试通过该中继用户设备与网络建立连接和通信；另外可以避免这个过程中造成的资源浪费以及远端用户设备的接入时延或数据通信时延。
本发明实施例还提供了一种用户设备1000，如图10所示，包括：
接收模块1001，用于接收第二用户设备发送的第一消息，所述第一消息中包含指示所述第二用户设备支持演进的用户设备到网络的中继功能的信息；
所述接收模块1001，还用于接收网络设备发送的第二消息，所述第二消息中包含指示所述网络设备支持演进的用户设备到网络的中继的信息，或者所述第二消息中包含指示所述网络设备发送所述第二消息的小区支持演进的用户设备到网络的中继的信息。
在一实施例中，所述第一消息为设备到设备间的发现消息，或者，所述第一消息为无线资源控制层(RRC)消息。
在一实施例中，当所述发现消息的内容类型为第一预设值时，所述发现消息是用于演进的用户设备到网络的中继发现的宣告消息，或者，所述发现消息是用于演进的用户设备到网络的中继发现的响应消息。
在一实施例中，所述发现消息包括第一指示信息，所述第一指示信息用于指示所述第二用户设备支持演进的用户设备到网络的中继功能，和/或所述第一指示信息用于指示所述第二用户设备为演进的用户设备到网络的中继。
在一实施例中，所述发现消息包括第二指示信息和/或第三指示信息，所述第二指示信息用于指示所述第二用户设备支持通过侧行链路与所述第一用户设备进行连接的演进的用户设备到网络的中继功能，所述第三指示信息用于指示所述第二用户设备支持通过非3GPP接口与所述第一用户设备进行连接的演进的用户设备到网络的中继功能。
在一实施例中，所述RRC消息包括所述第二用户设备所在服务小区的相关系统信息；或者，所述RRC消息包含第四指示信息，所述第四指示信息用于指示所述第二用户设备支持演进的用户设备到网络的中继功能。
在一实施例中，所述接收模块1001具体用于：
当所述第一用户设备支持与所述第二用户设备通过侧行链路连接时，通过侧行链路接收所述第二用户设备发送的第一消息；
当所述第一用户设备支持与所述第二用户设备通过非3GPP接口连接时，通过非3GPP接口接收所述第二用户设备发送的第一消息。
在一实施例中，所述接收模块1001具体用于：
接收第二用户设备发送的第一消息，包括：所述第一用户设备通过侧行链路接收所述第二用户设备发送的第一消息。
在一实施例中，所述第一用户设备配置适配层，所述接收模块1001具体用于：
通过非3GPP接口接收所述第二用户设备发送的适配层协议数据单元(PDU)，所述适配层PDU包括第五指示信息和所述第一消息，所述第五指示信息用于指示所述适配层PDU包括所述第一消息。
在一实施例中，所述接收模块具体用于：
通过监听接收资源池以接收第二用户设备发送的所述发现消息，所述接收资源池用于 接收演进的用户设备到网络的中继发送的设备到设备间的发现消息。
在一实施例中，所述第二消息包括所述第一用户设备的第一配置信息和所述第二用户设备的第二配置信息。
在一实施例中，所述第二配置信息包括第一阈值，所述第一阈值用于指示所述第二用户设备在Uu链路的RSRP高于所述第一阈值时被允许向所述第一用户设备发送第一消息。
在一实施例中，针对通过侧行链路与所述第二用户设备连接的第一用户设备，所述第一配置信息包括以下至少一种：1)第二阈值，所述第二阈值用于指示所述第一用户设备在Uu链路的RSRP低于所述第二门限值时被允许发送用于演进的用户设备到网络的中继发现的请求消息；2)第三阈值，所述第三阈值用于指示所述第一用户设备在第一用户设备与第二用户设备之间的侧行链路的RSRP高于所述第三阈值时，被允许将所述第二用户设备作为候选的演进的用户设备到网络的中继。
在一实施例中，针对通过非3GPP接口与所述第二用户设备连接的第一用户设备，所述第一配置信息包括以下至少一种：1)第四阈值，所述第四阈值用于指示所述第一用户设备在Uu链路的RSRP低于所述第四阈值时被允许通过第二用户设备与网络进行非直连通信；2)第五阈值，所述第五阈值用于指示所述第一用户设备在第一用户设备与第二用户设备之间的非3GPP链路的信道质量高于所述第五阈值时，将所述第二用户设备作为候选的演进的用户设备到网络的中继。
需要说明的是，上述各模块(接收模块1001)用于执行上述方法的相关步骤。
在本实施例中，用户设备1000是以模块的形式来呈现。这里的“模块”可以指特定应用集成电路(application-specific integrated circuit，ASIC)，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。此外，以上接收模块1001可通过图12所示的计算设备的通信接口1203来实现。
可见，一个中继用户设备和一个网络设备通过指示信息告知eRemote UE其支持Layer-2Relay，或告知eRemote UE其发送指示信息的小区支持Layer-2Relay。从而避免了eRemote UE与一个不支持Layer-2Relay功能的中继用户设备建立连接后，无法通过该中继用户设备与网络建立连接和通信，另外还可以避免这个过程中造成的资源浪费以及远端用户设备的接入时延或数据通信时延。
本发明实施例还提供了一种网络设备1100，如图11所示，包括：
发送模块1101，用于发送第二消息，所述第二消息中包含指示所述网络设备支持演进的用户设备到网络的中继的信息，或者所述第二消息中包含指示所述网络设备发送所述第二消息的小区支持所述演进的用户设备到网络的中继的信息。
在一实施例中，所述第二消息包括所述第一用户设备的第一配置信息和所述第二用户设备的第二配置信息。
在一实施例中，所述第二配置信息包括第一阈值，所述第一阈值用于指示所述第二用户设备在Uu链路的RSRP高于所述第一阈值时被允许向所述第一用户设备发送第一消息。
在一实施例中，针对通过侧行链路与所述第二用户设备连接的第一用户设备，所述第一配置信息包括以下至少一种：1)第二阈值，所述第二阈值用于指示所述第一用户设备在 Uu链路的RSRP低于所述第二门限值时被允许发送用于演进的用户设备到网络的中继发现的请求消息；2)第三阈值，所述第三阈值用于指示所述第一用户设备在第一用户设备与第二用户设备之间的侧行链路的RSRP高于所述第三阈值时，被允许将所述第二用户设备作为候选的演进的用户设备到网络的中继。
在一实施例中，针对通过非3GPP接口与所述第二用户设备连接的第一用户设备，所述第一配置信息包括以下至少一种：1)第四阈值，所述第四阈值用于指示所述第一用户设备在Uu链路的RSRP低于所述第四阈值时被允许通过第二用户设备与网络进行非直连通信；2)第五阈值，所述第五阈值用于指示所述第一用户设备在第一用户设备与第二用户设备之间的非3GPP链路的信道质量高于所述第五阈值时，将所述第二用户设备作为候选的演进的用户设备到网络的中继。
在本实施例中，网络设备1100是以模块的形式来呈现。这里的“模块”可以指特定应用集成电路(application-specific integrated circuit，ASIC)，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。此外，以上发送模块1101可通过图12所示的计算设备的通信接口1203来实现。
可见，一个网络设备通过指示信息告知eRemote UE和Relay UE其发送指示信息的小区支持Layer-2Relay。从而避免了eRemote UE与一个不支持Layer-2Relay功能的中继用户设备建立连接后，无法通过该中继用户设备与网络建立连接和通信，另外还可以避免这个过程中造成的资源浪费以及远端用户设备的接入时延或数据通信时延。
如图12所示，计算机设备1200可以以图12中的结构来实现，该计算机设备1200包括用户设备和网络设备，该计算设备1200包括至少一个处理器1201，至少一个存储器1202以及至少一个通信接口1203。所述处理器1201通过通信总线与所述存储器1202和所述通信接口1203连接并完成相互间的通信。
处理器1201可以是通用中央处理器(CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制以上方案程序执行的集成电路。
通信接口1203，用于与其他设备或通信网络通信，如以太网，无线接入网(RAN)，无线局域网(Wireless Local Area Networks，WLAN)等。
存储器1202可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(Electrically Erasable Programmable Read-Only Memory，EEPROM)、只读光盘(Compact Disc Read-Only Memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器可以是独立存在，通过总线与处理器相连接。存储器也可以和处理器集成在一起。
其中，所述存储器1202用于存储执行以上方案的应用程序代码，并由处理器1201来控制执行。所述处理器1201用于执行所述存储器1202中存储的应用程序代码。
假设计算设备1200为用户设备时，存储器1202存储的代码可执行以上提供的第一用户设备执行的上述指示方法，比如接收第二用户设备发送的第一消息，所述第一消息中包含指示所述第二用户设备支持演进的用户设备到网络的中继功能的信息；接收网络设备发送的第二消息，所述第二消息中包含指示所述网络设备支持演进的用户设备到网络的中继的信息，或者所述第二消息中包含指示所述网络设备发送所述第二消息的小区支持演进的用户设备到网络的中继的信息。
假设计算设备1200为网络设备时，存储器1202存储的代码可执行以上提供的网络设备执行的上述指示方法，比如发送第二消息，所述第二消息中包含指示所述网络设备支持演进的用户设备到网络的中继的信息，或者所述第二消息中包含指示所述网络设备发送所述第二消息的小区支持所述演进的用户设备到网络的中继的信息。
可见，一个中继用户设备和一个网络设备通过指示信息告知eRemote UE其支持Layer-2Relay，或告知eRemote UE其发送指示信息的小区支持Layer-2Relay。从而避免了eRemote UE与一个不支持Layer-2Relay功能的中继用户设备建立连接后，无法通过该中继用户设备与网络建立连接和通信，另外还可以避免这个过程中造成的资源浪费以及远端用户设备的接入时延或数据通信时延。
本发明实施例还提供一种计算机存储介质，其中，该计算机存储介质可存储有程序，该程序执行时包括上述方法实施例中记载的用户设备执行的一种指示方法的部分或全部步骤。
本发明实施例还提供一种计算机存储介质，其中，该计算机存储介质可存储有程序，该程序执行时包括上述方法实施例中记载的网络设备执行的一种指示方法的部分或全部步骤。
需要说明的是，对于前述的各方法实施例，为了简单描述，故将其都表述为一系列的动作组合，但是本领域技术人员应该知悉，本发明并不受所描述的动作顺序的限制，因为依据本发明，某些步骤可以采用其他顺序或者同时进行。其次，本领域技术人员也应该知悉，说明书中所描述的实施例均属于优选实施例，所涉及的动作和模块并不一定是本发明所必须的。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置，可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单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本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，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储器中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储器中，包括若干指令用以使得一台计算机设备(可为个人计算机、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全部或部分步骤。而前述的存储器包括：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序可以存储于一计算机可读存储器中，存储器可以包括：闪存盘、只读存储器(英文：Read-Only Memory，简称：ROM)、随机存取器(英文：Random Access Memory，简称：RAM)、磁盘或光盘等。
以上对本发明实施例进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上上述，本说明书内容不应理解为对本发明的限制。

Claims (38)

  1. 一种指示方法，其特征在于，包括：
    第一用户设备接收第二用户设备发送的第一消息，所述第一消息中包含指示所述第二用户设备支持演进的用户设备到网络的中继功能的信息；
    所述第一用户设备接收网络设备发送的第二消息，所述第二消息中包含指示所述网络设备支持演进的用户设备到网络的中继的信息，或者所述第二消息中包含指示所述网络设备发送所述第二消息的小区支持演进的用户设备到网络的中继的信息。
  2. 根据权利要求1所述的方法，其特征在于，所述第一消息为设备到设备间的发现消息，或者，所述第一消息为无线资源控制层(RRC)消息。
  3. 根据权利要求2所述的方法，其特征在于，当所述发现消息的内容类型为第一预设值时，所述发现消息是用于演进的用户设备到网络的中继发现的宣告消息，或者，所述发现消息是用于演进的用户设备到网络的中继发现的响应消息。
  4. 根据权利要求2所述的方法，其特征在于，所述发现消息包括第一指示信息，所述第一指示信息用于指示所述第二用户设备支持演进的用户设备到网络的中继功能，和/或所述第一指示信息用于指示所述第二用户设备为演进的用户设备到网络的中继。
  5. 根据权利要求2所述的方法，其特征在于，所述发现消息包括第二指示信息和/或第三指示信息，所述第二指示信息用于指示所述第二用户设备支持通过侧行链路与所述第一用户设备进行连接的演进的用户设备到网络的中继功能，所述第三指示信息用于指示所述第二用户设备支持通过非3GPP接口与所述第一用户设备进行连接的演进的用户设备到网络的中继功能。
  6. 根据权利要求2所述的方法，其特征在于，所述RRC消息包括所述第二用户设备所在服务小区的相关系统信息；或者，所述RRC消息包含第四指示信息，所述第四指示信息用于指示所述第二用户设备支持演进的用户设备到网络的中继功能。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述第一用户设备接收所述第二用户设备发送的第一消息，包括：
    当所述第一用户设备支持与所述第二用户设备通过侧行链路连接时，所述第一用户设备通过侧行链路接收所述第二用户设备发送的第一消息；
    当所述第一用户设备支持与所述第二用户设备通过非3GPP接口连接时，所述第一用户设备通过非3GPP接口接收所述第二用户设备发送的第一消息。
  8. 根据权利要求1-6任一项所述的方法，其特征在于，所述第一用户设备接收第二用户设备发送的第一消息，包括：所述第一用户设备通过侧行链路接收所述第二用户设备发送的第一消息。
  9. 根据权利要求7所述的方法，其特征在于，所述第一用户设备配置适配层，所述第一用户设备通过非3GPP接口接收所述第二用户设备发送的第一消息，包括：
    所述第一用户设备的适配层通过非3GPP接口接收所述第二用户设备发送的适配层协议数据单元(PDU)，所述适配层PDU包括第五指示信息和所述第一消息，所述第五指示 信息用于指示所述适配层PDU包括所述第一消息。
  10. 根据权利要求2-6任一项所述的方法，其特征在于，所述第一用户设备接收第二用户设备发送的所述发现消息，包括：所述第一用户设备通过监听接收资源池以接收第二用户设备发送的所述发现消息，所述接收资源池用于接收演进的用户设备到网络的中继发送的设备到设备间的发现消息。
  11. 根据权利要求1-10任一项所述的方法，其特征在于，所述第二消息包括所述第一用户设备的第一配置信息和所述第二用户设备的第二配置信息。
  12. 根据权利要求11所述的方法，其特征在于，所述第二配置信息包括第一阈值，所述第一阈值用于指示所述第二用户设备在Uu链路的RSRP高于所述第一阈值时被允许向所述第一用户设备发送第一消息。
  13. 根据权利要11或12所述的方法，其特征在于，针对通过侧行链路与所述第二用户设备连接的第一用户设备，所述第一配置信息包括以下至少一种：1)第二阈值，所述第二阈值用于指示所述第一用户设备在Uu链路的RSRP低于所述第二门限值时被允许发送用于演进的用户设备到网络的中继发现的请求消息；2)第三阈值，所述第三阈值用于指示所述第一用户设备在第一用户设备与第二用户设备之间的侧行链路的RSRP高于所述第三阈值时，被允许将所述第二用户设备作为候选的演进的用户设备到网络的中继。
  14. 根据权利要求11或12所述的方法，其特征在于，针对通过非3GPP接口与所述第二用户设备连接的第一用户设备，所述第一配置信息包括以下至少一种：1)第四阈值，所述第四阈值用于指示所述第一用户设备在Uu链路的RSRP低于所述第四阈值时被允许通过第二用户设备与网络进行非直连通信；2)第五阈值，所述第五阈值用于指示所述第一用户设备在第一用户设备与第二用户设备之间的非3GPP链路的信道质量高于所述第五阈值时，将所述第二用户设备作为候选的演进的用户设备到网络的中继。
  15. 一种指示方法，其特征在于，包括：
    网络设备发送第二消息，所述第二消息中包含指示所述网络设备支持演进的用户设备到网络的中继的信息，或者所述第二消息中包含指示所述网络设备发送所述第二消息的小区支持所述演进的用户设备到网络的中继的信息。
  16. 根据权利要求15所述的方法，其特征在于，所述第二消息包括所述第一用户设备的第一配置信息和所述第二用户设备的第二配置信息。
  17. 根据权利要求15或16所述的方法，其特征在于，所述第二配置信息包括第一阈值，所述第一阈值用于指示所述第二用户设备在Uu链路的RSRP高于所述第一阈值时被允许向所述第一用户设备发送第一消息。
  18. 根据权利要求15或16所述的方法，其特征在于，针对通过侧行链路与所述第二用户设备连接的第一用户设备，所述第一配置信息包括以下至少一种：1)第二阈值，所述第二阈值用于指示所述第一用户设备在Uu链路的RSRP低于所述第二门限值时被允许发送用于演进的用户设备到网络的中继发现的请求消息；2)第三阈值，所述第三阈值用于指示所述第一用户设备在第一用户设备与第二用户设备之间的侧行链路的RSRP高于所述第三阈值时，被允许将所述第二用户设备作为候选的演进的用户设备到网络的中继。
  19. 根据权利要求15或16所述的方法，其特征在于，针对通过非3GPP接口与所述 第二用户设备连接的第一用户设备，所述第一配置信息包括以下至少一种：1)第四阈值，所述第四阈值用于指示所述第一用户设备在Uu链路的RSRP低于所述第四阈值时被允许通过第二用户设备与网络进行非直连通信；2)第五阈值，所述第五阈值用于指示所述第一用户设备在第一用户设备与第二用户设备之间的非3GPP链路的信道质量高于所述第五阈值时，将所述第二用户设备作为候选的演进的用户设备到网络的中继。
  20. 一种用户设备，其特征在于，包括：
    接收模块，用于接收第二用户设备发送的第一消息，所述第一消息中包含指示所述第二用户设备支持演进的用户设备到网络的中继功能的信息；
    所述接收模块，还用于接收网络设备发送的第二消息，所述第二消息中包含指示所述网络设备支持演进的用户设备到网络的中继的信息，或者所述第二消息中包含指示所述网络设备发送所述第二消息的小区支持演进的用户设备到网络的中继的信息。
  21. 根据权利要求20所述的用户设备，其特征在于，所述第一消息为设备到设备间的发现消息，或者，所述第一消息为无线资源控制层(RRC)消息。
  22. 根据权利要求21所述的用户设备，其特征在于，当所述发现消息的内容类型为第一预设值时，所述发现消息是用于演进的用户设备到网络的中继发现的宣告消息，或者，所述发现消息是用于演进的用户设备到网络的中继发现的响应消息。
  23. 根据权利要求21所述的用户设备，其特征在于，所述发现消息包括第一指示信息，所述第一指示信息用于指示所述第二用户设备支持演进的用户设备到网络的中继功能，和/或所述第一指示信息用于指示所述第二用户设备为演进的用户设备到网络的中继。
  24. 根据权利要求21所述的用户设备，其特征在于，所述发现消息包括第二指示信息和/或第三指示信息，所述第二指示信息用于指示所述第二用户设备支持通过侧行链路与所述第一用户设备进行连接的演进的用户设备到网络的中继功能，所述第三指示信息用于指示所述第二用户设备支持通过非3GPP接口与所述第一用户设备进行连接的演进的用户设备到网络的中继功能。
  25. 根据权利要求21所述的用户设备，其特征在于，所述RRC消息包括所述第二用户设备所在服务小区的相关系统信息；或者，所述RRC消息包含第四指示信息，所述第四指示信息用于指示所述第二用户设备支持演进的用户设备到网络的中继功能。
  26. 根据权利要求20-25任一项所述的用户设备，其特征在于，所述接收模块具体用于：
    当所述第一用户设备支持与所述第二用户设备通过侧行链路连接时，通过侧行链路接收所述第二用户设备发送的第一消息；
    当所述第一用户设备支持与所述第二用户设备通过非3GPP接口连接时，通过非3GPP接口接收所述第二用户设备发送的第一消息。
  27. 根据权利要求20-25任一项所述的用户设备，其特征在于，所述接收模块具体用于：
    接收第二用户设备发送的第一消息，包括：所述第一用户设备通过侧行链路接收所述第二用户设备发送的第一消息。
  28. 根据权利要求26所述的用户设备，其特征在于，所述第一用户设备配置适配层， 所述接收模块具体用于：
    通过非3GPP接口接收所述第二用户设备发送的适配层协议数据单元(PDU)，所述适配层PDU包括第五指示信息和所述第一消息，所述第五指示信息用于指示所述适配层PDU包括所述第一消息。
  29. 根据权利要求21-25任一项所述的用户设备，其特征在于，所述接收模块具体用于：
    通过监听接收资源池以接收第二用户设备发送的所述发现消息，所述接收资源池用于接收演进的用户设备到网络的中继发送的设备到设备间的发现消息。
  30. 根据权利要求20-29任一项所述的用户设备，其特征在于，所述第二消息包括所述第一用户设备的第一配置信息和所述第二用户设备的第二配置信息。
  31. 根据权利要求30所述的用户设备，其特征在于，所述第二配置信息包括第一阈值，所述第一阈值用于指示所述第二用户设备在Uu链路的RSRP高于所述第一阈值时被允许向所述第一用户设备发送第一消息。
  32. 根据权利要求30或31所述的用户设备，其特征在于，针对通过侧行链路与所述第二用户设备连接的第一用户设备，所述第一配置信息包括以下至少一种：1)第二阈值，所述第二阈值用于指示所述第一用户设备在Uu链路的RSRP低于所述第二门限值时被允许发送用于演进的用户设备到网络的中继发现的请求消息；2)第三阈值，所述第三阈值用于指示所述第一用户设备在第一用户设备与第二用户设备之间的侧行链路的RSRP高于所述第三阈值时，被允许将所述第二用户设备作为候选的演进的用户设备到网络的中继。
  33. 根据权利要求30或31所述的用户设备，其特征在于，针对通过非3GPP接口与所述第二用户设备连接的第一用户设备，所述第一配置信息包括以下至少一种：1)第四阈值，所述第四阈值用于指示所述第一用户设备在Uu链路的RSRP低于所述第四阈值时被允许通过第二用户设备与网络进行非直连通信；2)第五阈值，所述第五阈值用于指示所述第一用户设备在第一用户设备与第二用户设备之间的非3GPP链路的信道质量高于所述第五阈值时，将所述第二用户设备作为候选的演进的用户设备到网络的中继。
  34. 一种网络设备，其特征在于，包括：
    发送模块，用于发送第二消息，所述第二消息中包含指示所述网络设备支持演进的用户设备到网络的中继的信息，或者所述第二消息中包含指示所述网络设备发送所述第二消息的小区支持所述演进的用户设备到网络的中继的信息。
  35. 根据权利要求34所述的用户设备，其特征在于，所述第二消息包括所述第一用户设备的第一配置信息和所述第二用户设备的第二配置信息。
  36. 根据权利要求34或35所述的用户设备，其特征在于，所述第二配置信息包括第一阈值，所述第一阈值用于指示所述第二用户设备在Uu链路的RSRP高于所述第一阈值时被允许向所述第一用户设备发送第一消息。
  37. 根据权利要求34或35所述的用户设备，其特征在于，针对通过侧行链路与所述第二用户设备连接的第一用户设备，所述第一配置信息包括以下至少一种：1)第二阈值，所述第二阈值用于指示所述第一用户设备在Uu链路的RSRP低于所述第二门限值时被允许发送用于演进的用户设备到网络的中继发现的请求消息；2)第三阈值，所述第三阈值用于 指示所述第一用户设备在第一用户设备与第二用户设备之间的侧行链路的RSRP高于所述第三阈值时，被允许将所述第二用户设备作为候选的演进的用户设备到网络的中继。
  38. 根据权利要求34或35所述的用户设备，其特征在于，针对通过非3GPP接口与所述第二用户设备连接的第一用户设备，所述第一配置信息包括以下至少一种：1)第四阈值，所述第四阈值用于指示所述第一用户设备在Uu链路的RSRP低于所述第四阈值时被允许通过第二用户设备与网络进行非直连通信；2)第五阈值，所述第五阈值用于指示所述第一用户设备在第一用户设备与第二用户设备之间的非3GPP链路的信道质量高于所述第五阈值时，将所述第二用户设备作为候选的演进的用户设备到网络的中继。
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