WO2018028694A1 - Procédé et dispositif de communication destinés au système de communication directe de dispositif et système de communication - Google Patents

Procédé et dispositif de communication destinés au système de communication directe de dispositif et système de communication Download PDF

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Publication number
WO2018028694A1
WO2018028694A1 PCT/CN2017/097210 CN2017097210W WO2018028694A1 WO 2018028694 A1 WO2018028694 A1 WO 2018028694A1 CN 2017097210 W CN2017097210 W CN 2017097210W WO 2018028694 A1 WO2018028694 A1 WO 2018028694A1
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WIPO (PCT)
Prior art keywords
relay
bearer
remote
forwarding
base station
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PCT/CN2017/097210
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English (en)
Chinese (zh)
Inventor
汪梦珍
陈琳
陈玉芹
黄莹
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中兴通讯股份有限公司
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Publication of WO2018028694A1 publication Critical patent/WO2018028694A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communications, and in particular to a communication method and apparatus, and a communication system for a device through system.
  • D2D technology can reduce the burden of cellular networks, reduce the battery power consumption of user equipment, increase the data rate, and improve the robustness of the network infrastructure, which satisfies the requirements of the above high data rate services and proximity services.
  • D2D technology is also called Proximity Services (ProSe), and one-side link (Sidelink, SL).
  • D2D technology can work in licensed or unlicensed bands, allowing multiple D2D-enabled user equipment (D2D User Equipment, D2D UE) to directly discover without network infrastructure or network infrastructure. / Direct communication.
  • the interface between D2D UEs is called a PC5 interface.
  • the D2D technology generally includes a D2D discovery technology and a D2D communication technology, wherein the D2D discovery technology is used to determine/determine the proximity between two or more D2D user devices (for example, within a range in which D2D direct communication is possible) .
  • D2D user equipment can discover each other by sending or receiving discovery signals/information.
  • D2D communication technology refers to a technology in which some or all of the communication data between D2D user equipments can communicate directly without going through the network infrastructure.
  • eMTC/NB-IoT devices Considering the low-cost nature of eMTC/NB-IoT devices, it is often desirable to extend the lifetime of eMTC/NB-IoT devices as much as possible, while coverage enhancements can result in multiple retransmissions of data packets, thereby quickly consuming the UE's power.
  • Wearables devices have similar application requirements such as low cost, low power consumption/saving, and high data rates.
  • a possible solution is to support the wearable/eMTC/NB-IoT device (referred to as remote UE or remote UE) to access the network through D2D communication, that is, the remote UE can connect to the relay node served by the UE ( Referring to the relay UE or the relay UE, the D2D communication is performed with the relay UE, and the UE is communicated with the network through the relay UE.
  • D2D communication between the remote UE and the relay UE includes, but is not limited to, sidelink/PC5 communication, WLAN, and BlueTooth.
  • the embodiments of the present invention provide a communication method and device, and a communication system for a device through-system, so as to solve at least the problem in the related art that there is no solution for supporting the relay UE to forward the bearer configuration and management of the remote UE data.
  • a communication method of a device through-system including: a user equipment (UE) receives PC5 interface configuration information, where the PC5 interface configuration information is used to configure a UE-supported device-to-device D2D communication function.
  • the UE is configured according to the configuration information of the PC5 interface.
  • a communication method for relaying a device through a system includes: transmitting, by a base station, PC5 interface configuration information to a user equipment UE, where the PC5 interface configuration information is used to configure the UE support device to Device D2D communication function.
  • a communication method of a device through-through system including: a remote UE accessing and/or connecting to a relay UE; and the remote UE forwarding data through the relay UE.
  • a communication method for relaying a device through a system includes: receiving, by a base station, relay related configuration information, where the relay related configuration information is used for remote UE discovery, measurement, Selecting and accessing the relay UE; the base station performing processing corresponding to the relay related configuration information according to the relay related configuration information.
  • a communication device of a device through-system which is applied to a user equipment UE, and the device includes: a receiving module, configured to receive PC5 interface configuration information, where the PC5 interface configuration information It is used to configure the device-to-device D2D communication function of the UE; the configuration module is configured to be configured according to the configuration information of the PC5 interface.
  • a communication device of a device through-through system is provided, which is applied to a remote user equipment UE, the device comprising: an access module, configured to access and/or connect to a relay UE And a forwarding module configured to forward data through the relay UE.
  • a communication system including: a user equipment UE and a base station, where the user equipment is configured to receive PC5 interface configuration information sent by the base station, and configure according to the PC5 interface.
  • the information is configured, wherein the PC5 interface configuration information is used to configure the UE-supported device-to-device D2D communication function.
  • a communication system including: a remote user equipment UE and a relay UE, where the remote UE is used to access and/or connect to a relay UE, And forwarding data through the relay UE.
  • a storage medium is also provided.
  • the storage medium is configured to store program code for performing the following steps: a user equipment (UE) receives PC5 interface configuration information, wherein the PC5 interface configuration information is used to configure the UE support device to the device D2D
  • the communication function is configured by the UE according to the configuration information of the PC5 interface.
  • a storage medium is also provided.
  • the storage medium is configured to store program code for performing: the base station receiving relay related configuration information, wherein the relay related configuration information is used by the remote UE to discover, measure, select, and access the relay UE; The base station performs processing corresponding to the relay related configuration information according to the relay related configuration information.
  • another storage medium is also provided.
  • the storage medium is arranged to store program code for performing the steps of: the base station transmitting PC5 interface configuration information to the user equipment UE, wherein the PC5 interface configuration information is used to configure the UE support device to device D2D communication function.
  • the UE can receive the configuration information of the PC5 interface or the base station can receive the configuration information of the relay. Therefore, the UE can support the configuration and management of the bearer forwarding of the w-UE data. There is no problem in supporting a solution for relaying UEs to forward bearer configuration and management of remote UE data.
  • FIG. 1 is a schematic diagram of a scene in which a wearable device accesses a network communication by relaying a UE according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a communication method of a device through system according to an embodiment of the present invention
  • FIG. 3 is a block diagram showing the structure of a communication device of a device through-through system according to an embodiment of the present invention
  • FIG. 4 is a flow chart of another communication method of a device through system according to an embodiment of the present invention.
  • FIG. 5 is a structural block diagram of another communication device of a device through-through system according to an embodiment of the present invention.
  • FIG. 6 is a flow chart of another communication method of a device through system according to an embodiment of the present invention.
  • FIG. 7 is a flow chart of another communication method of a device through system according to an embodiment of the present invention.
  • FIG. 9 is a flowchart of establishing and communicating a relay forwarding bearer according to Embodiment 2 of the present invention.
  • FIG. 10 is a flowchart of establishing and communicating a relay forwarding bearer according to Embodiment 3 of the present invention.
  • Example 11 is a flowchart of another relay forwarding bearer establishment and communication according to Example 3 of the present invention.
  • FIG. 13 is a flowchart of a modification of a PC5 bearer of the example 6 of the present invention.
  • 15 is a flowchart of implementing a relay forwarding of a PC5 bearer by an instance 7 UE according to the present invention
  • 16 is a flow chart of relay forwarding of Instance 8 of the present invention through WLAN access;
  • FIG. 17 is a flowchart of another relay forwarding method through WLAN access according to Embodiment 9 of the present invention.
  • FIG. 18 is a flowchart of the information related to the interactive relay of the 10S1 interface of the present invention.
  • 19 is a flow chart of the related information of the 11X2 interface interactive relay of the present invention.
  • the w-UE establishes a communication connection with the relay UE, and performs a negotiation configuration and a Uu bearer configuration of the PC5 bearer that relays the w-UE data of the relay UE, thereby ensuring that the w-UE passes the relay UE and the network. Smooth communication.
  • the device accesses the network through D2D communication.
  • the w-UE can be connected to the relay node served by the UE (referred to as relay UE or r-).
  • the UE communicates with the r-UE in a D2D manner, and the r-UE is responsible for forwarding the data packet of the w-UE to the network or forwarding from the network to the w-UE.
  • the w-UE can also access the relay node through a non-3GPP (non-3GPP) mode (such as WLAN, BlueTooth), thereby achieving extended coverage and network communication.
  • a non-3GPP non-3GPP
  • WLAN Wireless Fidelity
  • BlueTooth Wireless Fidelity
  • the UE mentioned in the embodiment of the present application includes but is not limited to a wearable UE, an MTC, an IoT device, and the like.
  • FIG. 2 is a flow chart of a communication method of a device through system according to an embodiment of the present invention. As shown in Figure 2, the method includes:
  • Step S202 the UE receives the PC5 interface configuration information, where the PC5 interface configuration information is used to configure the UE-supported device-to-device D2D communication function;
  • the foregoing PC5 interface configuration information includes at least one of the following: PC5 bearer configuration information, PC5 logical channel configuration information, mapping information between the PC5 logical channel group and the Uu logical channel priority, PC5 packet priority, and Uu bearer.
  • the quality of service level identifies the mapping information of the QCI and the relay forwarding indication information.
  • Step S204 The UE performs configuration according to the PC5 interface configuration information.
  • the foregoing UE includes: a remote UE and/or a relay UE; and the foregoing UE receiving the PC5 interface configuration information includes: the remote UE receiving the PC5 bearer configuration information sent by the base station; and/or the foregoing relay UE receiving the base station sending
  • the PC5 carries the configuration information; and/or the remote UE or the relay UE receives the relay forwarding indication information sent by the base station; and/or the remote UE receives the PC5 logical channel group and the Uu logical channel priority sent by the base station.
  • the mapping information between the mapping information or the PC5 packet priority and the Uu bearer QCI; and/or the relay UE receives the mapping information between the PC5 logical channel group and the Uu logical channel priority of the remote UE sent by the base station.
  • PC5 bearer configuration information includes one or any combination of the following: PC5 bearer construction Establish configuration information; PC5 carries the modified configuration information; PC5 carries the release information.
  • the foregoing PC5 bearer setup configuration information includes at least one of the following: a PC5 bearer identifier, a radio link control protocol acknowledgement mode RLC AM configuration information, a radio link control protocol non-acknowledgement mode RLC UM configuration information, a logical channel identifier LC ID, and a logic.
  • the channel group identifier LCG ID, the priority guaranteed bit rate PBR, the bucket size duration BSD, the UE PC5 interface aggregate maximum bit rate, and the PC 5 carries QoS information.
  • the foregoing PC5 bearer QoS information includes at least one of the following: a quality of service level QCI, a guaranteed bit rate GBR, and a maximum bit rate MBR.
  • the foregoing RLC AM configuration information includes at least one of the following: RLC AM mode sequence number length, polling retransmission timer (t-PollRetransmit), polling protocol data unit (pollPDU), polling byte number (pollByte) ), maximum retransmission threshold (maxRetxThreshold) (also known as maximum retransmission times), reordering timer (t-Reordering), state prohibit timer (t-StatusProhibit); RLC UM mode configuration information includes any combination of the following: Confirm mode serial number field length (sn-FieldLength), maximum retransmission threshold (maxRetxThreshold), reordering timer (t-Reordering).
  • the PC5 carries the PC5 bearer identifier, the logical channel identifier, and the logical channel group identifier in the configuration information, and multiplexes the EPS bearer or the Uu bearer configuration of the user equipment UE.
  • the PC5 bearer modification configuration information is used to update or reconfigure any field combination in the PC5 bearer setup configuration information;
  • the PC5 bearer release information includes at least one of the following: a PC5 bearer identifier or a logical channel identifier that needs to be released, and is released. the reason.
  • the relay forwarding indication information received by the remote UE includes at least one of: a relay UE identifier (eg, may be represented by a ProSe layer-2 ID); a control plane forwarding indication; a user plane forwarding indication; an uplink forwarding indication; The downlink forwarding indication; the relayed EPS bearer identifier; the relayed DRB identifier; the relayed logical channel identifier; the uplink data forwarding indication corresponding to each EPS bearer, the downlink data forwarding indication corresponding to each EPS bearer, and each The uplink and downlink data forwarding indications corresponding to the EPS bearers;
  • the relay forwarding indication information received by the relay UE includes at least one of the following: a remote UE identifier, a control plane forwarding indication of the remote UE, a user plane forwarding indication of the remote UE, and a remote UE
  • the EPS bearer information includes: at least one of the following: an EPS bearer identifier, QCI, GBR, and MBR.
  • the foregoing UE is configured according to the foregoing configuration information of the PC5 interface, including: the remote UE and the foregoing relay UE establish or modify or release a PC5 bearer;
  • the establishing, by the remote UE, the PC5 bearer and the foregoing relaying UE includes: sending, by the remote UE, PC5 bearer setup configuration information to the relay UE; and receiving, by the remote UE, the PC5 bearer setup completion information sent by the relay; and Or the relay UE sends the PC5 bearer setup configuration information to the remote UE, and the relay UE receives the PC5 bearer setup complete information sent by the remote UE.
  • the PC5 bearer setup configuration information and the PC5 bearer setup complete information may be carried by the following message: a PC5NAS signaling message, or a PC5AS signaling message.
  • the method further includes: the relay UE receiving the PC5 bearer setup configuration information sent by the remote UE; and/or the relay UE pair The remote UE performs admission control; and/or the relay UE determines whether to establish a forwarding Uu bearer, where the forwarding Uu bearer is used to relay the UE to forward the remote UE data to the base station.
  • the foregoing relaying UE performs the admission control on the remote UE, where the foregoing relaying UE performs the QoS information of the PC5 in the PC5 bearer setup configuration information that is sent by the remote UE, and the relay UE has The number of PC5 bearers and the resource load are determined to determine whether to accept the establishment of a new PC5 bearer; or the relay UE sends the foregoing remote UE identifier to the base station, and the base station determines whether to allow the relay UE to accept according to the resource scheduling/allocation situation. Establish a PC5 bearer.
  • the foregoing determining, by the relay UE, whether to establish a forwarding Uu bearer includes: the relaying UE, according to the PC5 bearer QoS information in the PC5 bearer setup configuration information sent by the remote UE, and the RRC information maintained by the relay UE
  • the IP bearer list information is used to determine whether there is a forwarding Uu bearer that meets the requirements. If not, the relay UE initiates a service request and bears resources to the network. Assigning or modifying the forwarding Uu bearer by assigning a request or carrying a resource modification request.
  • the foregoing service request, the bearer resource allocation request, or the bearer resource modification request message that is sent by the foregoing relaying UE to the network carries a forwarding bearer indication, where the forwarding bearer indication is used to indicate to the network that the bearer is used to forward the remote UE. data.
  • the relay UE determines whether to establish a forwarding Uu bearer, where the forwarding Uu bearer is used to relay the UE to forward the remote UE data to the base station; The relay UE sends the relay forwarding response information to the base station.
  • the relay forwarding response information includes: relay forwarding acceptance information or relay forwarding rejection information, where the relay forwarding acceptance information includes: an EPS list allowed by the remote UE to be forwarded by the relay, and the forwarding is denied by the relay. EPS list.
  • the method further includes: the relay UE receives the forwarded Uu bearer from the base station.
  • the establishment configuration information of the forwarding Uu bearer includes at least one of the following: a Uu DRB identifier, a packet data convergence protocol PDCP configuration, an RLC configuration, a logical channel identifier, and a logical channel configuration.
  • the foregoing relay UE after receiving the relay forwarding indication information sent by the base station, includes: the foregoing relay UE sends an EPS bearer list that is allowed to be forwarded by the relay to the base station, and rejects an EPS bearer list that is forwarded by the relay.
  • the remote UE before the remote UE receives the relay forwarding indication information sent by the base station, the remote UE sends the relay forwarding interest indication information to the base station by using RRC dedicated signaling, where the relay forwarding interest indication information includes the following At least one of: an IP forwarding list, a control plane forwarding indication, a user plane forwarding indication, an uplink forwarding indication, a downlink forwarding indication, and an EPS bearer list that is expected to be forwarded by the relay.
  • the remote UE sends a relay forwarding interest indication to the eNB in an attach request Attach request or a service request service request or through RRC dedicated signaling.
  • the UE is configured according to the configuration information of the PC5 interface, and includes at least one of the following: the remote UE or the relay UE completes the configuration of the PC5 bearer according to the received configuration information of the received PC5 bearer, and sends an RRC reconfiguration complete message. Notifying the base station that the PC5 bearer setup is completed; The remote UE or the relay UE performs the modification of the PC5 bearer according to the received configuration information of the received PC5 bearer, and sends an RRC reconfiguration complete message to the base station to notify the PC5 that the bearer modification is complete; the remote UE or the relay UE receives the received The PC5 bears the release information and completes the release of the PC5 bearer.
  • the remote UE according to the received relay forwarding indication information and the mapping information of the PC5 data packet priority PPPP and Uu bearer QCI, will need to carry the EPS bearer data forwarded by the relay UE. According to the QCI of the EPS bearer, the corresponding PPPP is associated, and the foregoing data is transmitted through the PC5 interface. The remote UE needs to pass the relay UE according to the received relay forwarding indication information and the mapping information of the pre-configured PPPP and Uu bearer QCI.
  • the data of the forwarded EPS bearer is associated with the corresponding PPPP, and the foregoing data is transmitted through the PC5 interface; the remote UE according to the received relay forwarding indication information and the mapping information between the PC5 logical channel group and the Uu logical channel priority,
  • the data of the EPS bearer that needs to be forwarded by the relaying UE is associated with the corresponding PPPP, and the foregoing data is transmitted through the PC5 interface; the remote UE is determined according to the received PC5.
  • the embodiment further provides a communication device of the device through system, which is applied to the UE.
  • the device includes:
  • the receiving module 30 is configured to receive the PC5 interface configuration information, where the PC5 interface configuration information is used to configure the UE supporting device to the device D2D communication function;
  • the foregoing PC5 interface configuration information includes at least one of the following:
  • PC5 bearer configuration information PC5 logical channel configuration information, mapping information between the PC5 logical channel group and the Uu logical channel priority, mapping information of the PC5 packet priority and the Uu-bearing quality of service level identifier QCI, and relay forwarding indication information .
  • the configuration module 32 is configured to be configured according to the configuration information of the PC5 interface.
  • the embodiment of the present invention further provides another communication method of the device through system, as shown in FIG. 4, the method includes the following processing steps:
  • Step S402 the remote UE accesses and/or connects to the relay UE.
  • Step S404 the remote UE forwards data through the relay UE.
  • the relay access mode supported by the remote UE and the relay UE includes at least one of the following: a sidelink or a PC5 interface, a WLAN, and a Bluetooth BlueTooth; and the remote UE accesses/connects to the medium through the sidelink or the PC5. Following the UE; or the remote UE accesses the relay UE through the WLAN; or the remote UE accesses the relay UE through the BlueTooth.
  • the remote UE receives the relay related configuration information sent by the base station, where the relay related configuration information is used for remote UE discovery, measurement, selection, and Accessing the relay UE; the remote UE completes the configuration according to the foregoing relay related configuration information.
  • the foregoing relay related configuration information includes at least one of the following: a relay measurement threshold, a relay discovery threshold, a relay selection threshold, a relay selection hysteresis value, a relay discovery transmission/reception resource, a WLAN measurement threshold, and a WLAN.
  • Measurement configuration information WLAN selection threshold, WLAN selection hysteresis value, BlueTooth selection threshold, BlueTooth selection hysteresis value;
  • the method further includes: the remote UE sending the relay forwarding interest indication to the base station.
  • the foregoing relay forwarding interest indication includes at least one of the following: a relay forwarding interest, a desired relay access mode, a control plane forwarding indication, a user plane forwarding indication, an uplink forwarding indication, a downlink forwarding indication, and an expected pass.
  • each EPS bearer corresponds to an uplink data forwarding indication, a downlink data forwarding indication, and an uplink and downlink data forwarding indication.
  • the method further includes: the relay UE sending the relay support indication information or the relay support update information to the base station, where the relay support The update information is used to update/modify/reconfigure any field in the relay support indication information.
  • the foregoing relay support indication information includes at least one of: a relay UE identifier, a relay support indication, a supported relay access mode, WLAN information, and BlueTooth information;
  • the foregoing WLAN information includes: a WLAN terminal WT identifier, a WLAN identifier, a basic service set identifier BSSID, a WLAN operation type, a WLAN country code, a maximum capacity, a WLAN bandwidth information, a service set identifier SSID, and a homogeneous extended service set HESSID.
  • the remote UE performs the relay measurement or the relay discovery or the WLAN measurement, according to the relay measurement result or the relay selection threshold or the relay selection hysteresis value or the WLAN measurement result or the WLAN selection threshold or the WLAN selection hysteresis value or the BlueTooth selection threshold or BlueTooth selects the hysteresis value and selects the relay UE or WLAN or BlueTooth to access the relay UE via sidelink/PC5 or WLAN or BT.
  • the base station selects the relay UE for the remote UE, and sends the selected relay UE to the remote UE by using RRC dedicated signaling.
  • the notifying the remote UE by the selected relay UE by using the RRC dedicated signaling includes: the ProSe layer 2 identifier of the relay UE, the ProSe layer 2 ID, or the C-RNTI identifier of the relay UE, or the WLAN MAC address of the relay UE .
  • the method includes: sending, by the remote UE or the relay UE, a relay connection status report to the base station; the foregoing relay connection status report includes at least one of the following The WLAN MAC address of the remote UE, the ProSe UE ID of the remote UE, the ProSe UE ID of the relay UE, the relay access mode, the connection succeeds, the connection fails, and the failure reason;
  • the relay connection status report may be sent by at least one of the following: sidelink UEInformation, WLAN connection status report, WLAN association confirmation message, RRC dedicated signaling.
  • the method before the remote UE forwards the data by using the relay UE, the method includes: the relay UE receives the relay forwarding request information sent by the base station, and the relay UE sends the relay forwarding response information to the base station.
  • the foregoing relay forwarding request information includes at least one of the following: a WLAN MAC address of the remote UE, a ProSe UE ID of the remote end, and an E-RAB identifier and a QoS parameter of the remote end that are expected to be forwarded by the relay. , eNB GTP tunnel endpoint.
  • the foregoing relay forwarding response information includes at least one of the following: allowing an E-RAB identifier list forwarded by the relay, and rejecting the E-RAB identifier list forwarded by the relay.
  • the relay UE performs admission control on the E-RAB that is expected to be forwarded by the relay in the relay forwarding request, where the relay UE is configured according to the Determining the bearer status of the relay UE, determining whether there is an established forwarding Uu bearer that satisfies the QoS requirement, and determining that the forwarded Uu bearer is allowed to be admitted; if the forwarded Uu bearer can be admitted, the relay UE initiates establishment of the corresponding After the EPS bearer, or the base station receives the relay forwarding response information sent by the relay UE, the base station sends configuration information for establishing the forwarding Uu bearer to the relay UE.
  • the forwarding Uu bearer configuration information sent by the base station to the relay UE includes at least one of the following: a Uu DRB identifier, a pdcp configuration, an rlc configuration, a logical channel identifier, and a logical channel configuration.
  • the method includes: the remote UE receiving the relay forwarding indication information sent by the base station, where the relay forwarding indication information includes at least one of the following: Control plane forwarding indication, user plane forwarding indication, uplink forwarding indication, downlink forwarding indication, EPS forwarding identifier/DRB identifier/logical channel identifier that can be forwarded by the relay, and uplink data forwarding indication and downlink data forwarding indication corresponding to each EPS bearer , uplink and downlink data forwarding instructions.
  • the relay forwarding indication information includes at least one of the following: Control plane forwarding indication, user plane forwarding indication, uplink forwarding indication, downlink forwarding indication, EPS forwarding identifier/DRB identifier/logical channel identifier that can be forwarded by the relay, and uplink data forwarding indication and downlink data forwarding indication corresponding to each EPS bearer , uplink and downlink data forwarding instructions.
  • the embodiment of the present invention further provides a communication device of the device through-system, which is applied to the remote user equipment UE, and the device is used to implement the method of the embodiment shown in FIG. 4.
  • the device includes:
  • the access module 50 is configured to access and/or connect to the relay UE;
  • the forwarding module 52 is configured to forward data through the relay UE.
  • the foregoing relay mode supported by the remote UE and the relay UE includes the following at least One: sidelink or PC5 interface, WLAN, Bluetooth BlueTooth; the above-mentioned remote UE accesses/connects to the relay UE through the above sidelink or PC5; or the remote UE accesses the relay UE through WLAN access; or the remote UE connects through the BlueTooth Into the relay UE.
  • An embodiment of the present invention further provides a communication method for relaying a device through a system. As shown in FIG. 6, the method includes:
  • Step S602 the base station receives the relay related configuration information, where the relay related configuration information is used by the remote UE to discover, measure, select, and access the relay UE.
  • step S604 the base station performs the foregoing according to the foregoing relay related configuration information. The processing corresponding to the relay related configuration information.
  • the base station receives the relay-related configuration information, where the base station acquires the relay-related configuration information from the MME through the S1 interface, or the base station acquires the relay-related configuration information from the neighboring base station or the target base station by using the X2 interface.
  • the foregoing relay related configuration information includes at least one of the following: a relay forwarding interest/request, a relay forwarding bearer indication, a remote UE identifier, an access mode, a relay UE identifier, a control plane forwarding indication, and a user plane forwarding indication.
  • the uplink forwarding indication, the downlink forwarding indication, the uplink and downlink forwarding indication, and the UE PC5 aggregate the maximum bit rate.
  • the access modes include: D2D access, WLAN access, and BlueTooth access.
  • the foregoing base station acquires the foregoing relay related configuration information from the MME by using an S1 interface, where the at least one of the following: the base station acquires the relay related configuration information from the MME by using a bearer setup request or a bearer modification request message of the S1 interface; The base station acquires the foregoing relay related configuration information from the MME by using an initial context setup request or a UE context modification request message of the S1 interface; the base station acquires the relay related configuration information from the MME by using a handover request of the S1 interface and a path switch request acknowledgement message; The foregoing base station acquires the foregoing relay related configuration information from the MME by using an MME configuration transmission message of the S1 interface.
  • the foregoing base station acquires the relay related configuration information from the neighboring/target base station by using the X2 interface, and includes at least one of the following: the base station acquires the foregoing relay related configuration from the neighboring base station or the target base station by using a handover request message of the X2 interface. Information; the foregoing base station acquires relay related configuration information from a neighboring base station or a target base station by using an X2 setup request or an X2 setup response message of the X2 interface; the base station obtains a transmission message from a neighboring base station or a target base station through a base station configuration transmission message of the X2 interface. Take the relay related configuration information.
  • the foregoing MME includes: receiving, by the MME, the relay related configuration information sent by the remote UE or the relay UE.
  • the method further includes: sending, by the remote UE or the relay UE, the relay related configuration information by using at least one of the following: an Attach request, a service request, a bearer resource allocation request, and a bearer resource modification request.
  • the foregoing base station performs processing corresponding to the foregoing relay-related configuration information according to the foregoing relay-related configuration information, including: if the base station receives a relay forwarding interest or a relay forwarding request, the base station is a remote UE.
  • the base station sends a relay forwarding bearer setup request to the relay UE, and the base station receives a relay forwarding bearer setup response sent by the relay UE; if the base station receives the relay forwarding bearer indication, the base station Dedicating the Uu bearer of the relay UE and the Uu bearer of the relay UE to data according to the relay forwarding bearer indication, so as to correctly map the downlink remote UE data to the corresponding Uu bearer; if the foregoing base station receives at least one of the following relay related configurations Information: a remote UE identifier, an access mode, a relay UE identifier, an uplink forwarding indication, a downlink forwarding indication, an uplink and a downlink forwarding indication, and the foregoing base station saves the received relay related configuration information, and according to different access modes, Performing measurement configuration, resource configuration, and/or bearer configuration on the remote UE and/or the relay UE; if the
  • the base station After the base station receives the UE-PC5-AMBR, the base station sends the UE-PC5-AMBR to the remote UE or the relay UE by using RRC dedicated signaling; the remote UE or the relay UE
  • the PC5 communication is performed according to the UE-PC5-AMBR autonomously selecting resources.
  • the foregoing relay forwarding bearer setup request includes at least one of the following: a WLAN MAC address of the remote UE, a ProSe UE ID of the remote UE, an E-RAB identifier forwarded by the remote UE, and a QoS parameter. , eNB GTP tunnel termination point; and/or
  • the foregoing relay forwarding bearer setup response information includes at least one of the following: allowing transit through the relay A list of E-RAB identifiers sent, rejecting the E-RAB identifier list forwarded by the relay;
  • the method includes: the relay UE performs admission control on the E-RAB that is expected to be forwarded through the relay in the relay forwarding bearer setup request, and relays
  • the UE determines, according to its own bearer situation, whether there is an established forwarding Uu bearer that meets the QoS requirement, and determines the forwarding Uu bearer that is allowed to be admitted. If there is a forwarding Uu bearer that is allowed to be established, the relay UE initiates establishment of the corresponding EPS bearer.
  • the base station receives the relay forwarding bearer setup response information sent by the relay UE, the base station sends configuration information for establishing the forwarded Uu bearer to the relay UE.
  • the establishing and forwarding Uu bearer configuration information that is sent by the base station to the relaying UE includes at least one of the following: a Uu DRB identifier, a PDCP configuration, an RLC configuration, a logical channel identifier, and a logical channel configuration.
  • An embodiment of the present invention further provides a communication method for relaying a device through a system. As shown in FIG. 7, the method includes:
  • step S702 the base station acquires the PC5 interface configuration information, where the PC5 interface configuration information is used to configure the UE to support the device to the device D2D communication function; optionally, the step may be obtained from other entities such as the MME, or may be obtained from the local storage.
  • Step S704 the base station sends the PC5 interface configuration information to the user equipment UE.
  • the foregoing PC5 interface configuration information includes at least one of the following: PC5 bearer configuration information, PC5 logical channel configuration information, mapping information between the PC5 logical channel group and the Uu logical channel priority, PC5 packet priority, and Uu bearer.
  • the quality of service level identifies the mapping information of the QCI and the relay forwarding indication information.
  • the foregoing UE includes: a remote UE and/or a relay UE; and the base station sends the PC5 interface configuration information to the UE, where the base station sends the PC5 bearer configuration information to the remote UE; and/or the base station sends the configuration to the foregoing
  • the UE sends the PC5 bearer configuration information; and/or the base station sends the relay forwarding indication information to the remote UE or the relay UE; and/or the base station sends the PC5 logical channel group and the Uu logical channel priority to the remote UE.
  • Mapping information between the PC5 packet priority and Uu bearer QCI mapping information; and/or the above base station to the above relay The UE sends mapping information between the PC5 logical channel group of the remote UE and the Uu logical channel priority.
  • the UE includes: a remote UE and a relay UE; the base station receives a remote UE identifier sent by the relay UE; and the base station determines whether to allow the relay UE according to resource scheduling or allocation status. Accept the establishment of a PC5 bearer.
  • the base station receives the relay response information sent by the relay UE, where the relay response information is the relay UE.
  • the information sent after determining whether to forward the Uu bearer is determined.
  • the response information includes: relay forwarding acceptance information or relay forwarding rejection information, where the relay forwarding acceptance information includes: an EPS list of the remote UE that is allowed to be forwarded by the relay, and a rejection relay Forwarded EPS list.
  • the base station after the base station receives the relay response information sent by the relay UE, the base station sends, to the relay UE, the establishment configuration information of the forwarding Uu bearer; the establishment configuration information of the forwarding Uu bearer includes the following at least One: Uu DRB identification, packet data convergence protocol PDCP configuration, RLC configuration, logical channel identification, logical channel configuration.
  • the base station before the base station sends the relay forwarding indication information to the remote UE, the base station receives the relay forwarding interest indication information that is sent by the remote UE by using the RRC dedicated signaling, where
  • the following forwarding interest indication information includes at least one of the following: a relay forwarding interest, a control plane forwarding indication, a user plane forwarding indication, an uplink forwarding indication, a downlink forwarding indication, and an EPS bearer list that is expected to be forwarded through the relay.
  • the embodiment of the present invention further provides a communication system, including: a user equipment UE and a base station, where the user equipment is configured to receive configuration information of a PC5 interface sent by the base station, and configured according to the configuration information of the PC5 interface, where the PC5 interface is configured.
  • the configuration information is used to configure the UE-supported device-to-device D2D communication function.
  • the embodiment of the present invention further provides a communication system, including: a remote user equipment UE and a relay UE, where the remote UE is used to access and/or connect to the relay UE, and is forwarded by the relay UE. data.
  • a communication system including: a remote user equipment UE and a relay UE, where the remote UE is used to access and/or connect to the relay UE, and is forwarded by the relay UE. data.
  • the technical problem to be solved in the following embodiments is how to support the relay UE to forward bearer configuration and management problems of the remote UE (including but not limited to wearable/eMTC/NB-IoT device (w-UE)) data.
  • the method is as follows.
  • the remote UE establishes a communication connection with the relay UE, and performs a negotiation configuration and a Uu bearer configuration of the PC5 bearer that relays the UE data of the remote UE, thereby ensuring that the remote UE passes the relay UE and
  • the network communicates smoothly.
  • the wearable UE w-UE
  • the r-UE or the relay UE is used to indicate the relay UE.
  • This example provides a method for forwarding a bearer configuration and establishing a related process in a scenario in which the data of the wearable/eMTC/NB-IoT UE is forwarded by the relay UE, as shown in FIG. 8.
  • the w-UE is under normal coverage or extended coverage, and the eNB can directly perform signaling interaction, and considers cost and power saving issues, finds a relay r-UE, and forwards data through the r-UE to reduce power.
  • the relay r-UE is in the connected state, and the w-UE and the r-UE are in the same base station coverage.
  • Step 0 Relay discovery and selection.
  • R13ProSe UE-to-network relay discovery process supports two relay discovery modes, relay broadcast discovery message, w-UE listening, or w-UE sending discovery solicitation message, relay response.
  • the w-UE autonomously selects a relay according to the link quality and signal strength between the r-UE, and reports the selected relay to the eNB.
  • Step 1 When the w-UE has data transmission or the network has data to the w-UE, the w-UE or the PGW initiates the establishment of the EPS bearer of the w-UE.
  • the EPS bearer establishment process of the w-UE is a conventional LTE process, which is well-known in the industry and will not be described here.
  • Step 2 When the w-UE or the PGW initiates the establishment of the EPS bearer of the w-UE, and the eNB configures the corresponding Uu interface DRB for the w-UE, the eNB can simultaneously configure the corresponding PC5 bearer for the EPS bearer.
  • the PC5 bearer setup configuration information includes any combination of the following: PC5 bearer identifier, pdcp configuration, rlc configuration, logical channel identifier, logical channel configuration, and PC5 bearer QoS information; wherein, the rlc configuration includes any combination of the following: polling retransmission timer (t -PollRetransmit), polling protocol data unit (pollPDU), polling byte count (pollByte), maximum retransmission threshold (maxRetxThreshold), re-sequence timer (t-Reordering), state-disabled timer (t-StatusProhibit), unacknowledged mode serial number field length (sn-FieldLength); logical channel configuration includes: logical channel group LCG, priority guarantee bit Rate PBR, bucket size duration BSD; PC5 bearer QoS information includes any combination of the following: quality of service level QCI, guaranteed bit rate GBR, maximum bit rate MBR, UE aggregated maximum bit rate
  • the PC5 carries the PC5 bearer identifier, the logical channel identifier, and the logical channel group in the configuration information, and can multiplex the Uu DRB identifier, the logical channel identifier, and the logical channel group of the corresponding EPS bearer. If not, the PC5 bearer establishes the configuration information.
  • the EPS bearer identifier and the Uu DRB identifier corresponding to the EPS bearer are included.
  • the PC5 bearer configuration information is sent to the w-UE through an RRC reconfiguration message.
  • the PC5 bearer configuration information includes indication information that initiates PC5 bearer establishment to the relay UE. After the PC5 bearer setup is complete (ie, after step 4 is completed), the w-UE sends an RRC reconfiguration complete message to the eNB to indicate that the PC5 bearer setup is complete.
  • Step 3 The w-UE performs a security layer 2 connection with the selected r-UE, and the w-UE sends a direct communication request to the r-UE to carry the ProSe UE ID, and the r-UE responds.
  • the direct communication request and response message can be multiplexed with the PC5Signalling Protocol message (NAS message) of R13, or by the PC5 AS signaling message, meaning that the protocol layer of the PC5 control plane protocol will add a protocol layer similar to RRC.
  • NAS message PC5Signalling Protocol message
  • Step 4 PC5 bears configuration interaction and bearer establishment.
  • the w-UE sends a PC5 bearer setup message to the r-UE, carries the PC5 bearer setup configuration information received from the eNB, and the corresponding PC5 bearer QoS information, and the r-UE sends a response message, and completes the PC5 bearer configuration.
  • the PC5 bearer setup and response message may also be a PC5NAS signaling message or a PC5AS signaling message.
  • Step 5 After receiving the PC5 bearer setup message of the w-UE, the r-UE may perform admission control on the w-UE.
  • the r-UE determines whether to accept the establishment of a new PC5 bearer according to the PC5 bearer QoS information in the PC5 bearer setup configuration information sent by the received w-UE, and the number of PC5 bearers and resource load conditions established by the r-UE; or r-
  • the UE sends the PC5 bearer QoS information to the base station, and the base station determines whether to allow the r-UE to accept the establishment of the PC5 bearer according to the resource scheduling/allocation situation.
  • the r-UE sends a PC5 bearer setup response message to the w-UE after allowing admission to establish a PC5 bearer.
  • Step 6 After receiving the PC5 bearer setup message of the w-UE and accepting the establishment of the PC5 bearer, the r-UE determines whether it is necessary to establish an EPS bearer dedicated to forwarding w-UE data, and the r-UE according to the received w - the PC5 bearer QoS information and the EPS bearer list information maintained by the r-UE in the PC5 bearer setup configuration information, and determine whether there is an EPS bearer dedicated to forwarding w-UE data that satisfies the requirements, if not, r- The UE initiates a service request, a bearer resource allocation request, or a bearer resource modification request to the network, and establishes or modifies an EPS bearer that is dedicated to forwarding the w-UE data.
  • the EPS bearer establishment process is a traditional LTE process, and details are not described herein again.
  • Step 7 After the EPS bearer dedicated to forwarding the w-UE data is established, the r-UE indicates to the eNB that the EPS bearer is dedicated to forwarding w- through an RRC message (RRC dedicated signaling or RRC reconfiguration complete message or sidelink UEInformation).
  • RRC message RRC dedicated signaling or RRC reconfiguration complete message or sidelink UEInformation.
  • UE data (with EPS bearer identifier/DRB identifier/logical channel identifier), the purpose is to have two EPS bearers with the same QCI value when the r-UE is used (one for transmitting r-UE own data and one for forwarding w- When the UE data), the eNB can distinguish which EPS bearer/DRB is used to forward the w-UE data, thereby correctly mapping the data to the corresponding bearer transmission.
  • Step 8 The w-UE and the eNB negotiate the EPS bearer that is forwarded by the relay.
  • the PC5 bearer corresponding to the EPS bearer of the w-UE is established in the example 5, and the Uu bearer dedicated to the w-UE data is forwarded by the r-UE.
  • the w-UE can negotiate with the eNB which EPS bearer data is forwarded by the r-UE, and then the data of the EPS of the agreed w-UE is forwarded by the r-UE.
  • This example provides another specific example of the process of forwarding the bearer configuration and establishing related processes in the scenario where the data of the wearable/eMTC/NB-IoT device (w-UE) is forwarded through the relay r-UE, as shown in FIG. 9.
  • This example is basically similar to Example 1, except that the order of the individual steps is adjusted.
  • Step 0 The w-UE has data transmission or initiates an EPS bearer setup according to service requirements. For the traditional LTE process, it will not be described here.
  • Step 1 The w-UE performs relay discovery and selection, and the R13ProSe UE-to-Network relay discovery process. And after selecting the relay UE, performing a security layer 2 connection with the selected relay UE, Specifically, it is the same as step 3 in Example 1.
  • Step 2 The w-UE and the eNB negotiate the EPS bearer that is forwarded by the eNB.
  • the specific method is different from the eNB.
  • the w-UE negotiates with the eNB.
  • the data carried by the EPS is forwarded by the relay.
  • the corresponding PC5 bearer setup and the U-bearer dedicated to the w-UE data are forwarded by the r-UE. set up.
  • Step 3 After the w-UE and the eNB negotiate the data of the EPS bearers, the eNB configures the PC5 bearer corresponding to the EPS bearers for the w-UE, and the eNB sends the PC5 bearer configuration information to the w-UE through the RRC reconfiguration message. .
  • the PC5 bearer configuration information is the same as that described in step 2 of Example 1.
  • the w-UE sends an RRC reconfiguration complete message to the eNB to indicate that the PC5 bearer setup is complete.
  • Step 4-5 The PC5 bearer configuration interaction and bearer establishment between the w-UE and the r-UE, and the r-UE performs admission control on the w-UE. Specifically, it is the same as step 4-5 in Example 1.
  • Step 6 After receiving the PC5 bearer setup message of the w-UE and accepting the establishment of the PC5 bearer, the r-UE determines whether it is necessary to establish an EPS bearer dedicated to forwarding w-UE data, and the r-UE according to the received w - the PC5 bearer QoS information and the EPS bearer list information maintained by the r-UE in the PC5 bearer setup configuration information, and determine whether there is an EPS bearer dedicated to forwarding w-UE data that satisfies the requirements, if not, r-
  • the UE initiates a service request, a bearer resource allocation request, or a bearer resource modification request to the network, and establishes or modifies an EPS bearer dedicated to forwarding the w-UE data, and the request message of the w-UE to the MME may carry the forwarding bearer indication, and then The forwarding bearer indication is also carried in the Bearer setup request/Session management request/Bearer modify request.
  • the data of the agreed EPS bearers of the w-UE is forwarded by the relay r-UE.
  • This example provides another wearable/eMTC/NB-IoT device (w-UE) data forwarding scenario through the relay r-UE.
  • w-UE wearable/eMTC/NB-IoT device
  • Step 1 The W-UE determines the communication mode that is forwarded by the relay according to the requirements of QoS, power saving, etc., and the w-UE carries the PC5 transmission interest indication in the RRC connection setup request message to the eNB when the RRC connection is established. Indicates PC5 communication interest.
  • Step 2 The w-UE performs relay discovery and selection, and the R13ProSe UE-to-network relay discovery process. After selecting the relay, the W-UE informs the eNB of the selected relay information, that is, the ProSe UE ID carrying the relay through the sidelink UEInformation message. The w-UE establishes a security layer 2 connection with the relay UE, specifically, the same as step 3 in the example 1.
  • Step 3-4 When the network has data for the w-UE, the PGW initiates the establishment of the EPS bearer of the w-UE. After the bearer is established, the w-UE data is transmitted to the eNB through the bearer, and the traditional LTE process.
  • Step 5 The w-UE has informed the eNB that its PC5 transmits the interest indication, and the eNB holds the relay UE information selected by the w-UE, and the eNB needs to forward the w-UE data to the w-UE through the relay. If the eNB finds that the relay UE does not meet the QoS requirements for the Uu DRB dedicated to forwarding the w-UE data, the w-UE and the r-UE have not established the corresponding PC5 bearer, and the eNB performs the PC5 bearer configuration and forwarding for the w-UE and the r-UE. Uu bearer configuration of w-UE data.
  • Step 6 Establishment of the w-UE PC5 bearer.
  • the eNB sends the PC5 bearer setup configuration to the w-UE.
  • the PC5 bearer setup configuration information includes a configuration indication that informs the w-UE/r-UE that the eNB has configured the PC5 bearer for the peer, and does not need to initiate the PC5 bearer interaction.
  • the w-UE sends an RRC reconfiguration message to the eNB to indicate that the PC5 bearer setup is complete.
  • Step 7 The r-UE PC5 bears the establishment of the Uu DRB that establishes and forwards the w-UE data.
  • the eNB sends the Uu DRB configuration of the PC5 bearer setup configuration and the forwarding of the w-UE data to the w-UE.
  • the Uu DRB configuration includes: Uu DRB identifier, pdcp configuration, rlc configuration, logical channel identifier, and logical channel configuration. Initiating the establishment of an EPS bearer for forwarding w-UE data with the r-UE in the above example.
  • the Uu DRB is obtained by establishing an EPS bearer that forwards the w-UE data, and in the present example, the Uu DRB that forwards the w-UE data has only one DRB of the air interface, and there is no corresponding EPS bearer.
  • the r-UE sends an RRC reconfiguration message to the eNB to indicate that the PC5 bearer setup is complete and the Uu DRB setup is complete.
  • the eNB sends the data of the w-UE to the relay UE, which is newly created by the relay UE and is dedicated to forwarding the w-UE data.
  • the relay UE After receiving the data of the w-UE, the relay UE sends the data to the w-UE through the PC5 bearer.
  • the PC5 bearer and the Uu bearer of the w-UE data that the relay UE forwards are established, and the uplink/downlink data of the w-UE with the same QoS requirement can be forwarded by the relay UE.
  • the relay UE initiates PC5 bearer setup to the w-UE, and the relay UE establishes a Uu bearer dedicated to forwarding w-UE data (same as in the example 1) by initiating a conventional EPS bearer setup procedure.
  • the eNB sends the PC5 bearer setup configuration information to the relay UE, and the relay UE initiates the PC5 bearer setup to the w-UE, and carries the PC5 bearer setup configuration information, and the w-UE receives the PC5 bearer setup configuration information.
  • the PC5 bearer is set up according to the configuration, and the PC5 bearer setup response message is sent to the relay UE.
  • the relay UE After completing the PC5 bearer setup, the relay UE sends a message to the eNB to notify the PC5 that the bearer setup is completed. While the w-UE downlink data arrives at the eNB, the eNB checks whether the relay UE has an EPS bearer that forwards the w-UE data that meets the QoS requirement, and if not, the eNB instructs the relay UE to initiate an EPS bearer that establishes the forwarding w-UE data, and After the establishment of the EPS bearer is completed, the relay UE indicates to the eNB that the EPS bearer is used to forward w-UE data.
  • This example provides another wearable/eMTC/NB-IoT device (w-UE) data forwarding scenario through the relay r-UE, the w-UE has no direct signaling interaction with the eNB, and the w-UE control plane signaling The user plane data is forwarded by the relay UE.
  • the specific example is shown in Figure 12.
  • the Relay UE is in the connected state and the relay related configuration is activated.
  • Step 0 Relay discovery and selection. Same as the above example.
  • Step 1 After completing the discovery and selection of the relay, the w-UE establishes a security layer 2 connection/communication connection with the selected relay UE.
  • the relay connection establishment related message is performed through PC5AS signaling.
  • the relay UE After receiving the direct communication request of the w-UE, the relay UE sends the sidelink UEInformation to the eNB, and informs the eNB that the w-UE is connected to it, and the relay communication is to be performed.
  • the eNB saves w-UE information.
  • the relay UE obtains subscription information and authorization information of the remote UE from the ProSe function, and carries the information in the sidelink UEInformation and sends the information to the eNB.
  • Step 2-5 The w-UE itself generates an RRC connection setup request message.
  • the RRC connection establishment process is completed by relaying control plane signaling.
  • the w-UE sends the generated RRC connection request message to the relay UE through the control plane message, and after receiving the relay UE, the RRC connection request information of the w-UE is forwarded to the eNB; the eNB performs access control on the w-UE, and allows After the w-UE is accessed, the RRC connection setup information of the w-UE is sent to the relay UE, and the relay UE forwards the information to the w-UE.
  • the w-UE sends the RRC connection complete information to carry the Attach message to the UE.
  • the relay UE forwards the message to the eNB, and the eNB forwards the Attach message to the core network, and completes the attach process of the w-UE by relay forwarding.
  • Step 6 The EPS bearer of the w-UE is established.
  • the eNB sends the EPS bearer configuration information of the w-UE to the relay UE, and the relay UE forwards the information to the w-UE.
  • the w-UE After completing the EPS bearer/Uu DRB configuration, the w-UE sends an RRC reconfiguration complete message to the eNB, and is forwarded by the relay UE.
  • Step 7-8 The eNB sends the configuration information of the PC5 bearer setup corresponding to the EPS bearer of the w-UE to the relay UE, and the relay UE initiates the PC5 bearer setup to the w-UE. And inform the eNB after the PC5 bearer setup is completed.
  • the relay UE detects whether there is a Uu bearer that forwards the w-UE data that satisfies the QoS requirement. If not, it initiates the establishment of an EPS bearer dedicated to forwarding the w-UE data and indicates to the eNB. After that, the uplink and downlink data of the w-UE with the same QoS requirement are forwarded through the relay.
  • This example provides a method for the w-UE mentioned in the above example to negotiate an EPS bearer forwarded by the eNB.
  • Method 1 The w-UE selects whether the communication mode is forwarded by the relay according to the QoS, the power saving requirement, etc. After the selection, the eNB can inform the eNB of the tendency of data communication when the connection is established, the service request, and the RRC connection. This method is embodied in Example 3.
  • the w-UE sends a relay forwarding indication to the eNB, and specifically, may include a relay forwarding interest indication or a relay UE ID, and then all the EPS bearer data of the w-UE is forwarded through the relay; or, the relay needs to be forwarded through the relay.
  • the EPS bearer identifier/logical channel identifier/Uu DRB identifier may further include an uplink forwarding indication, a downlink forwarding indication, and an uplink and downlink forwarding indication corresponding to the bearer.
  • the w-UE may send the relay forwarding indication information to the eNB through an RRC dedicated signaling or an RRC reconfiguration complete message or a sidelink UEInformation message.
  • the eNB sends a relay forwarding indication to the w-UE by using RRC dedicated signaling, such as an RRC reconfiguration message.
  • the eNB may include a relay UE ID and a relay related configuration, and an EPS of the w-UE forwarded by the relay.
  • Carrying related information such as an EPS bearer identifier/logical channel identifier/Uu DRB identifier, and further, each bearer corresponding uplink forwarding indication, downlink forwarding indication, uplink and downlink forwarding indication.
  • the w-UE indicates to the MME to forward the relay when the EPS bearer is established or modified, and the MME indicates to the eNB that the EPS bearer data is forwarded through the relay.
  • the w-UE sends a service request, a bearer resource allocation request, or a bearer resource modification request to the network, and when the EPS bearer is established or modified, the request message carries a relay forwarding indication, and then the MME establishes a bearer in the bearer sent to the eNB.
  • the message (Bearer setup request/Session management request/Bearer modify request) carries a relay forwarding indication.
  • the PC5 bearer between the w-UE and the relay UE supports the modification and release of the PC5 bearer. Initiated by the w-UE or relay UE. When the modification and release of the EPS bearer corresponding to the PC5 bearer of the w-UE is initiated, the modification and release of the bearer of the PC5 is initiated. Or, when the data of the EPS bearer does not need to be forwarded by the relay, the PC5 bearer corresponding to the EPS bearer is released. Or, when the PC5 resources are insufficient, the high-priority PC5 bears the low-priority PC5 bearer resources and releases the low-priority PC5 bearer.
  • the eNB simultaneously sends the PC5 bearer modification configuration corresponding to the EPS bearer to the w-UE, and the w-UE receives the PC5 bearer modification configuration of the eNB. Then, the sending PC5 carries the modification message to the relay UE, and performs the PC5 bearer modification, and the relay UE sends the PC5 bearer modification response message to the w-UE. After completing the PC5 bearer modification, the w-UE sends an RRC reconfiguration message to the eNB to inform the PC5 that the bearer modification is complete.
  • a PC5 bearer release procedure of a w-UE is provided, and the eNB instructs the w-UE to release the PC5 bearer, including the bearer identifier/logical channel identifier of the PC5 to be released, optionally, including the release reason;
  • the w-UE sends a PC5 bearer release message to the relay UE, carrying the PC5 bearer identifier/logical channel identifier to be released.
  • the w-UE informs the eNB PC5 that the bearer release is completed through the RRC reconfiguration message.
  • the PC5 logical connection (PC5 bearer setup) needs to be established/maintained.
  • This example provides a logical connection that does not maintain the PC5. (The method of implementing the PC5 bearer by the UE), the specific process is shown in FIG. 15.
  • Step 1-2 Relay find and select, and establish a PC5 security layer 2 connection.
  • the W-UE has data transmission and establishes an EPS bearer.
  • Step 3 Admission control is performed on the EPS bearer of the forwarded w-UE. If the Uu bearer that forwards the w-UE data that meets the QoS requirement is not met, the Uu bearer that forwards the w-UE data is initiated.
  • Step 4 The base station sends an RRC reconfiguration message to the w-UE, and may carry any combination of the following:
  • the mapping between the Uu logical channel priority of the w-UE and the LCG of the PC5 can be configured by the EPS bearer identifier/DRB identifier/logical channel identifier list forwarded by the relay, and the QCI and PPPP of the w-UE EPS bearer/DRB (ProSe) Mapping between Per Packet Priority);
  • Step 5 The w-UE transmits the Uu data to the PC5 interface, and may be based on the mapping relationship between the Uu logical channel priority configured by the base station and the LCG of the PC5, or the mapping relationship between the Uu QCI and the PPPP configured by the base station, or w- The mapping between the Uu QCI and the PPPP pre-configured by the UE, and mapping the Uu data to the PC5 interface for sending;
  • Step 6 The w-UE sends the data to the PDCP entity/RLC entity/logical channel/MAC entity when the data is transmitted.
  • the RLC entity is an RLC UM entity or an RLC AM entity, where the RLC AM entity parameters include any combination of the following: RLC AM mode serial number, polling retransmission timer (t-PollRetransmit), polling protocol data unit (pollPDU), polling byte number (pollByte), maximum retransmission threshold (maxRetxThreshold), reordering timer (t- Reordering), the state prohibition timer (t-StatusProhibit); after receiving the first MAC PDU, the receiving end r-UE establishes the receiving PDCP entity/RLC entity/logical channel/MAC entity to receive data.
  • This example provides a method for a w-UE to access a relay r-UE through a WLAN and forward the data through the r-UE.
  • the specific process is shown in FIG. 16.
  • the w-UE and the relay r-UE are under eNB coverage.
  • Step 1 The w-UE has the interest of forwarding through the relay due to the power saving, QoS, etc., and the w-UE indicates to the eNB that there is a relay forwarding interest and a w-UE capability report through the RRC dedicated signaling.
  • the access mode D2D, WLAN, BlueTooth
  • the relay UE with the relay capability or the relay initiation threshold is configured to send the relay support indication information to the eNB through the dedicated signaling.
  • the relay support indication information includes any combination of the following: a relay UE identifier, a relay support indication, a supported relay access mode, WLAN information, and BlueTooth information; wherein the relay access mode includes: D2D access, WLAN access , BlueTooth access;
  • WLAN information includes: WT (WLAN Termination) identifier, WLAN identity, basic service set identifier BSSID, WLAN operation type, WLAN country code, maximum capacity, WLAN bandwidth information, service set identifier SSID, homogeneous extension service set HESSID .
  • Step 3 The eNB sends the relay related configuration information to the w-UE.
  • the relay related configuration information includes any combination of the following: a relay measurement threshold, a relay discovery threshold, a relay selection threshold, a relay selection hysteresis value, a relay discovery transmission/reception resource, a WLAN measurement threshold, a WLAN measurement configuration information, and a WLAN selection. Threshold, WLAN select hysteresis value, BlueTooth selection threshold, BlueTooth select hysteresis value; base station sends relay related configuration information through RRC proprietary signaling or broadcast message;
  • Step 4 The w-UE performs WLAN measurement according to the WLAN measurement configuration sent by the eNB, and reports the measurement result to the eNB.
  • Step 5 The eNB selects a relay UE (WLAN) for the w-UE according to the measurement information reported by the w-UE;
  • WLAN relay UE
  • Step 6 The eNB sends the relay forwarding request information to the relay UE, and the relay forwarding request information includes: a WLAN MAC address of the w-UE, a ProSe UE ID of the w-UE, and an E-RAB that the w-UE expects to forward through the relay.
  • the relay r-UE After the relay r-UE receives the relay forwarding request information sent by the base station, the relay r-UE performs admission control on the E-RAB that is expected to be forwarded by the relay in the relay forwarding request, and the r-UE according to its own bearer situation.
  • the relay UE sends the relay forwarding response information to the base station, and the relay forwarding response information includes: an accepted E-RAB identifier list that can be forwarded by the relay, and a rejected E-RAB identifier list that is forwarded by the relay;
  • the forwarding response information is sent to the base station through an RRC reconfiguration completion or a sidelink UEInformation message.
  • Step 7 If there is a Uu bearer that can be established to forward the w-UE data, the r-UE initiates establishment of a corresponding EPS bearer (traditional procedure), or the base station receives the relay sent by the relay r-UE After forwarding the response information, the base station transmits configuration information for establishing the Uu bearer dedicated to forwarding the w-UE data to the r-UE.
  • EPS bearer traditional procedure
  • Step 8 The base station sends the selected relay UE and the EPS bearer information that can be forwarded to the w-UE through the RRC reconfiguration message.
  • Step 9 The w-UE performs a WLAN association to the relay r-UE, and sends a WLAN connection status report to the base station;
  • Step 10 The w-UE forwards data to the network through the relay r-UE, and receives data from the network forwarded by the relay r-UE.
  • This example provides another method for the w-UE to access the relay r-UE through the WLAN and forward the data through the r-UE.
  • the specific process is shown in FIG. 17.
  • the difference from the previous example is that the relay UE is autonomously selected by the w-UE in this example.
  • Step 1-3 Same as steps 1-3 in Example 8;
  • Step 4 The w-UE that reaches the WLAN measurement threshold acquires WLAN related information (WLAN content, non-3GPP content), and the w-UE selects a WLAN (relay UE) according to the acquired WLAN information, the WLAN selection threshold, and the WLAN selection hysteresis value. Then perform a WLAN association to the relay UE.
  • WLAN related information WLAN content, non-3GPP content
  • Step 5 If the w-UE successfully accesses the relay (associated to the WLAN), the relay UE sends a relay connection status report to the eNB, including the accessed w-UE identifier (such as the WLAN MAC address, the ProSe UE ID of the w-UE). );
  • Step 6 The relay r-UE performs admission control on the forwarded EPS bearer of the w-UE, which is the same as step 6-7 in the example 8;
  • Step 7 The w-UE forwards data to the network through the relay r-UE, or receives data from the network forwarded by the relay r-UE.
  • Step 8-9 If the w-UE moves to other WLAN APs of the WLAN mobility set, the relay UE Reporting WLAN connection status information to the base station or updating the relay support indication information (updating the connected/associated w-UE list).
  • This example provides a method for a base station to obtain w-UE or r-UE relay related information from an MME through an S1 interface, and the specific process is as shown in FIG. 18.
  • Step 1 The W-UE selects the communication mode that is forwarded by the relay according to the requirements of power saving and QoS, and after the selection, the w-UE sends an Attach request or a service request or a bearer resource allocation/modification request to the MME.
  • the message carries relay forwarding interest/request information
  • Step 2 After receiving the relay forwarding interest/request of the w-UE, the MME carries a relay forwarding interest/request in the initial context setup request or bearer setup request or bearer modification request message sent to the eNB to inform the eNB w - the communication tendency of the UE; if the w-UE is a UE supporting D2D/PC5 communication, the UE PC5 can also carry the maximum bit rate;
  • the base station After the base station receives the relay forwarding interest/request of the w-UE sent by the MME, if the base station saves the information of the relay r-UE of the w-UE (w-UE and the relay r-UE have completed the relay discovery and the PC5) Secure connection), directly to step 3; if the base station does not have the relay r-UE information of the w-UE, the base station selects/configures the r-UE for the w-UE, and notifies the selected relay r-UE to the w-UE;
  • Step 3 The eNB sends the relay forwarding bearer setup request information to the relay r-UE through the RRC reconfiguration message, and the relay forwarding bearer setup request information includes any combination of the following: a WLAN MAC address of the w-UE, and a ProSe UE of the w-UE ID, w-UE expects the E-RAB identifier forwarded by the relay, the QoS parameter, and the eNB GTP tunnel termination point; the relay r-UE expects to forward the relay in the relay forwarding bearer setup request after receiving the message
  • the E-RAB performs admission control, and the r-UE checks whether there is an established Uu DRB dedicated to forwarding w-UE data that satisfies the QoS requirement according to its own bearer situation, and determines that the established w-UE data can be admitted and established.
  • the relay r-UE sends the relay forwarding bearer setup response information to the eNB through the RRC reconfiguration complete or sidelink UEInformation message, which includes the received E-RAB list and the reject that can be forwarded by the relay w-UE E-RAB list; if there is a dedicated
  • the r-UE initiates the establishment of the corresponding EPS bearer, or after the base station receives the relay forwarding bearer setup response information sent by the relay r-UE, the base station sends a setup dedicated to forwarding the w-UE data.
  • the Uu bearer configuration information is sent to the r-UE.
  • the Uu bearer configuration information that is sent by the base station to the r-UE and is dedicated to forwarding the w-UE data includes: Uu DRB identifier, pdcp configuration, rlc configuration, logical channel identifier, and logical channel. Configuration.
  • Step 4-5 The r-UE initiates the establishment of an EPS bearer dedicated to the wearable UE data.
  • the r-UE allocates/modifies the bearer resources to the MME.
  • the request carries a relay forwarding bearer indication, which is used to indicate that the EPS bearer/corresponding UuDRB is dedicated to forwarding w-UE data; the MME also carries the indication to the eNB in the bearer setup/modification request sent to the eNB, so that when r- When the UE has two EPS bearers with the same QCI value (one for transmitting r-UE own data and one dedicated for forwarding w-UE data), the eNB can distinguish which EPS bearer/DRB is used to forward w-UE data, thereby Map the data correctly to the corresponding bearer.
  • a relay forwarding bearer indication which is used to indicate that the EPS bearer/corresponding UuDRB is dedicated to forwarding w-UE data
  • the MME also carries the indication to the eNB in the bearer setup/modification request sent to the eNB, so that when r- When the UE has two EPS bearers with the same QCI value (one for transmitting r-UE own data and
  • Step 6 After receiving the relay forwarding bearer setup response information sent by the r-UE and the r-UE completing the establishment of the EPS bearer/Uu DRB for forwarding the w-UE data, the eNB sends any of the following information through the RRC reconfiguration information.
  • the w-UE the selected relay r-UE identifier (if the eNB selects the r-UE), the PP bearer identifier/Uu DRB identifier/logical channel identifier that can be forwarded by the relay, and the PC5 bearer configuration (if performed by the eNB) PC5 bearer configuration), mapping relationship between QCI and PPPP, mapping relationship between Uu DRB logical channel priority and PC5LCG.
  • the w-UE establishes a PC5 bearer according to the configuration information or performs a WLAN association to access the relay UE through the WLAN or access the relay UE through the BlueTooth. After that, the data of the EPS bearer that the w-UE can relay through is relayed by the relay r-UE.
  • This example provides a method for a base station to obtain w-UE or r-UE relay related information from an adjacent/target base station through an X2 interface, and the specific process is as shown in FIG. w-UE and r-UE are under eNB1, And the w-UE has accessed the r-UE, and forwards the data with the network directly through the r-UE.
  • Step 1 The w-UE moves to the cell edge and triggers measurement reporting, and the source serving eNB1 receives the handover decision and switches to the eNB2;
  • Step 2 The source eNB1 of the w-UE sends the handover request information to the target eNB2, where the relay related information carrying the w-UE, such as the relay forwarding interest, the access mode, and the (connected) relay r-UE identifier
  • eNB2 can quickly know the r-UE and relay forwarding conditions connected to the w-UE; even if the r-UE does not move to the eNB2, the eNB2 can forward the interest, access mode, and UE-PC5 according to the relay.
  • Information such as AMBR, configure measurements for w-UE or perform appropriate resource scheduling/allocation.
  • Step 3 eNB2 performs admission control and resource reservation on the w-UE that requests the handover, and after transmitting, sends a handover request acknowledgement to eNB1, and eNB1 sends a handover command to the w-UE on the air interface; after that, the w-UE performs the air interface.
  • Step 4 After the w-UE completes the air interface handover to the eNB2, the eNB2 sends a path switch request to the MME, and the MME and the serving gateway complete the path conversion process of converting the user plane data path from the source base station to the base station, and then send a path switch to the target base station.
  • a confirmation message is requested, which carries relay related information of the w-UE.
  • the target base station saves the w-UE relay related information, and releases the w-UE context and related resources through the source base station. Thereafter, the eNB2 controls the w-UE, and related measurement configuration and resource allocation.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • the UE receives the configuration information of the PC5 interface, where the configuration information of the PC5 interface is used to configure the device-to-device D2D communication function of the UE.
  • the UE is configured according to the configuration information of the PC5 interface.
  • the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a random access memory (RAM, Random).
  • ROM Read-Only Memory
  • RAM random access memory
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the present embodiment is applied to the communication field, since the UE can receive the PC5 interface configuration.
  • the information or the base station can receive the relay-related configuration information. Therefore, the bearer UE can be configured to forward the bearer configuration and management of the w-UE data. Therefore, the bearer that supports the relay UE to forward the remote UE data in the related art can be solved. Problems with configuring and managing solutions.

Abstract

La présente invention concerne un procédé et un dispositif de communication destinés à un équipement d'utilisateur (UE) et à un système de communication. Le procédé comprend les étapes suivantes : un UE reçoit des informations de configuration d'interface PC5, les informations de configuration d'interface PC5 étant utilisées pour configurer l'UE pour prendre en charge une fonction de communication de dispositif à dispositif (D2D) et l'UE effectue la configuration selon les informations de configuration d'interface PC5.
PCT/CN2017/097210 2016-08-12 2017-08-11 Procédé et dispositif de communication destinés au système de communication directe de dispositif et système de communication WO2018028694A1 (fr)

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