WO2018028694A1

WO2018028694A1 - Communication method and device for direct device communication system, and communication system

Info

Publication number: WO2018028694A1
Application number: PCT/CN2017/097210
Authority: WO
Inventors: 汪梦珍; 陈琳; 陈玉芹; 黄莹
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-08-12
Filing date: 2017-08-11
Publication date: 2018-02-15
Also published as: CN108307472A; CN108307472B

Abstract

Provided are a communication method and device for a direct device communication system, and a communication system. The method comprises: a UE receiving PC5 interface configuration information, wherein the PC5 interface configuration information is used to configure the UE to support a device-to-device (D2D) communication function; and the UE performing configuration according to the PC5 interface configuration information.

Description

Communication method and device of device through system, communication system

Technical field

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.

Background technique

With the development of wireless multimedia services, people's demand for high data rates and user experience is increasing, which puts high demands on the system capacity and coverage of traditional cellular networks. On the other hand, application scenarios such as public safety, social networking, close-range data sharing, and local advertising have led to an increasing demand for understanding and communicating with nearby people or things (Proximity Services). The traditional base station-centric cellular network has obvious limitations in terms of high data rate and proximity service support. In the context of this demand, D2D (Device-to-Device, device to the new direction of future communication technology development) Equipment) technology came into being. The application of 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. At present, 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) . Generally, 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.

On the other hand, with the development of the Internet of Everything, 3GPP for machine type communication (MTC, Machine Type communication has been standardized, and the eMTC work of R12 and R13 has been basically completed. The standardization work of NB-IoT (Narrow Band-Internet of Things) is still in progress. Among them, R13eMTC adds coverage enhancement support and bandwidth limited support on the basis of low cost. In general, the radio frequency capability of the eMTC user equipment (UE) is limited to 1.4 MHz, while the radio frequency transceiver bandwidth of the NB-IoT device is limited to 180 kHz. The coverage enhancement is usually achieved between the eNB and the eMTC/NB-IoT UE by multiple repetitions of data transmission. 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. In addition to eMTC devices and NB-IoT devices, 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. For the remote UE accessing the relay UE through the sidelink/PC5 or non-3GPP (WLAN, BlueTooth), how to support the relay UE to forward the bearer configuration and management of the remote UE data, the prior art has not provided a complete system. solution.

Summary of the invention

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.

According to an embodiment of the present invention, a communication method of a device through-system is provided, 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.

According to still another aspect of the embodiments of the present invention, 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.

According to an aspect of the embodiments of the present invention, a communication method of a device through-through system is provided, including: a remote UE accessing and/or connecting to a relay UE; and the remote UE forwarding data through the relay UE.

According to an aspect of the embodiments of the present invention, 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.

According to still another aspect of the embodiments of the present invention, a communication device of a device through-system is provided, 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.

According to still another aspect of the embodiments of the present invention, 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.

According to still another aspect of the present invention, a communication system is provided, 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.

According to still another aspect of the present invention, a communication system is provided, 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.

According to still another embodiment of the present invention, 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.

According to still another embodiment of the present invention, 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.

According to still another embodiment of the present invention, 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.

According to the embodiment of the present invention, 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.

DRAWINGS

The drawings are intended to provide a further understanding of the embodiments of the present invention, and are intended to be a part of the present invention, and the description of the present invention is not intended to limit the invention. In the drawing:

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;

2 is a flowchart of a communication method of a device through system according to an embodiment of the present invention;

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;

4 is a flow chart of another communication method of a device through system according to an embodiment of the present invention;

5 is a structural block diagram of another communication device of a device through-through system according to an embodiment of the present invention;

6 is a flow chart of another communication method of a device through system according to an embodiment of the present invention;

7 is a flow chart of another communication method of a device through system according to an embodiment of the present invention;

8 is a flowchart of establishing and communicating a relay forwarding bearer according to Embodiment 1 of the present invention;

9 is a flowchart of establishing and communicating a relay forwarding bearer according to Embodiment 2 of the present invention;

10 is a flowchart of establishing and communicating a relay forwarding bearer according to Embodiment 3 of the present invention;

11 is a flowchart of another relay forwarding bearer establishment and communication according to Example 3 of the present invention;

12 is a flowchart of establishing and communicating a relay forwarding bearer according to Embodiment 4 of the present invention;

13 is a flowchart of a modification of a PC5 bearer of the example 6 of the present invention;

14 is a flow chart of the host 6PC5 bearer release according to 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;

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; FIG.

19 is a flow chart of the related information of the 11X2 interface interactive relay of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

There is a problem in the related art that supports relaying UEs to forward bearer configuration and management data of remote UEs including, but not limited to, wearable/eMTC/NB-IoT devices (w-UE). With the method proposed by 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.

One possible solution to the above problem is to support wearable/eMTC/NB-IoT The device (referred to as w-UE or remote UE or remote UE) accesses the network through D2D communication. As shown in Figure 1, 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. In addition, according to the R14feD2D requirement, 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. In this way, the w-UE can fully utilize the D2D/WLAN/BT communication power saving, and has the characteristics of high rate, extended coverage and the like.

It should be noted that 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.

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;

Optionally, 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.

Optionally, 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.

The foregoing 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.

Optionally, 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).

Optionally, 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.

Optionally, 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.

Optionally, 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 uplink forwarding indication, the downlink forwarding indication of the remote UE, the uplink data forwarding indication, the downlink data forwarding indication, the uplink and downlink data forwarding indication corresponding to the EPS bearer of the remote UE, and the remote UE that relays the forwarding The EPS bearer information includes: at least one of the following: an EPS bearer identifier, QCI, GBR, and MBR.

Optionally, 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;

Optionally, 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. Optionally, 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.

Optionally, after the remote UE sends the PC5 bearer setup configuration information to the relay UE, 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.

Optionally, 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.

Optionally, 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.

Optionally, 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.

Optionally, after the relay UE receives the relay forwarding indication information sent by the base station, 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.

Optionally, after the relay UE receives the PC5 bearer configuration information sent by the base station or the relay UE sends the relay forwarding response information to the base station, 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.

Optionally, after receiving the relay forwarding indication information sent by the base station, the foregoing relay UE 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.

Optionally, 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.

Optionally, 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. Establish a one-to-one correspondence between the PC5 bearer identifier or the PC5 logical channel identifier in the configuration information or the PC5 bearer identifier or the PC5 logical channel identifier generated by the remote UE and the EPS bearer identifier or the UuDRB identifier or the Uu logical channel identifier of the corresponding EPS bearer. The data of the EPS bearer that needs to be forwarded by the relay UE is mapped to the corresponding PC5 bearer/PC5 logical channel transmission.

The embodiment further provides a communication device of the device through system, which is applied to the UE. As shown in FIG. 3, 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;

Optionally, 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.

Optionally, 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.

Optionally, before the remote UE accesses and/or connects to the relay UE, 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.

Optionally, 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;

Optionally, before the remote UE receives the relay related configuration information sent by the base station, the method further includes: the remote UE sending the relay forwarding interest indication to the base station.

Optionally, 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. Following the forwarded EPS bearer identifier or the DRB identifier or the logical channel identifier, each EPS bearer corresponds to an uplink data forwarding indication, a downlink data forwarding indication, and an uplink and downlink data forwarding indication.

Optionally, before the remote UE receives the relay related configuration information sent by the base station, 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.

Optionally, 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;

Optionally, 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.

Optionally, the configuring, by the remote UE, according to the foregoing relay-related configuration information, that the remote UE performs the relay measurement or the relay discovery or the WLAN measurement, and reports the measurement result to the base station; or

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.

Optionally, after the remote UE reports the measurement result to the base station, 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 .

Optionally, after the remote UE accesses and/or connects to 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;

Optionally, 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.

Optionally, 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.

Optionally, 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.

Optionally, 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.

Optionally, after the relay UE receives the relay forwarding request information sent by the base station, 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.

Optionally, 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.

Optionally, before the remote UE forwards the data by using the foregoing relay UE, 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 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. As shown in FIG. 5, 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.

Optionally, 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. In 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.

Optionally, 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.

Optionally, 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.

Optionally, 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.

Optionally, before the foregoing base station acquires the foregoing relay related configuration information from the MME by using the S1 interface, the foregoing MME includes: receiving, by the MME, the relay related configuration information sent by the remote UE or the relay UE.

Optionally, 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.

Optionally, 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. Selecting or configuring a relay UE; and or, 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 base station receives the UE PC5 aggregation maximum bit The base station performs PC5 resource configuration for the remote UE or the relay UE according to the UE-PC5-AMBR.

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.

Optionally, 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;

Optionally, after the foregoing base station sends the relay forwarding bearer setup request information to the relay UE, 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. After 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.

Optionally, 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:

In 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.

Optionally, 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.

Optionally, 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.

Optionally, after the base station sends the relay forwarding indication information to the relay UE, 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.

Optionally, 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.

Optionally, 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.

Optionally, 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.

In order to better understand the above embodiments, the following detailed description will be given in conjunction with the embodiments.

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. It should be noted that, in the following examples, the wearable UE (w-UE) is taken as an example, and in the following examples, the r-UE or the relay UE is used to indicate the relay UE.

Example 1

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. In this example, 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. For the purpose of consumption, 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 (UE-AMBR). 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. Optionally, 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.

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. Similar to the connection establishment related message in step 3, 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). 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. For the specific method, 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. After that, 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.

Example 2

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. After the PC5 bearer corresponding to the EPS bearer of the w-UE is established, the w-UE negotiates with the eNB. The data carried by the EPS is forwarded by the relay. In this example, after the w-UE and the eNB negotiate the EPS bearer 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. . Specifically, the PC5 bearer configuration information is the same as that described in step 2 of Example 1. 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 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 other steps in the EPS bearer setup process are the traditional LTE processes, and are not described here.

After agreeing which of the EPS bearer data of the w-UE is forwarded by the relay and establishing the corresponding PC5 bearer and forwarding Uu bearer, the data of the agreed EPS bearers of the w-UE is forwarded by the relay r-UE.

Example 3

This example provides another wearable/eMTC/NB-IoT device (w-UE) data forwarding scenario through the relay r-UE. When the downlink w-UE data reaches the eNB, the PC5 bearer setup configuration and the Uu forwarding bearer Establish a specific example of the relevant process, as shown in Figure 10.

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. Optionally, 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. After the PC5 bearer setup is completed, 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 difference is that 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. After the PC5 bearer setup completes and the forwarding Uu DRB is established, 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. 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.

11 is similar to FIG. 10, except that 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. When the w-UE downlink data arrives at the eNB, 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. 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.

Example 4

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. In this example, the relay connection establishment related message is performed through PC5AS signaling. 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. Optionally, 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. After completing the RRC connection establishment, 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. 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.

As in the above example, 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.

Example 5

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.

Method 2: 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.

Method 3: The eNB sends a relay forwarding indication to the w-UE by using RRC dedicated signaling, such as an RRC reconfiguration message. Specifically, 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.

Method 4: 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. Specifically, 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.

Example 6

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.

As shown in FIG. 13, when the corresponding EPS bearer of the PC5 bearer of the w-UE is modified, 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.

As shown in FIG. 14, 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; After receiving the PC5 bearer release indication, the w-UE sends a PC5 bearer release message to the relay UE, carrying the PC5 bearer identifier/logical channel identifier to be released. After the PC5 bearer release is completed, the w-UE informs the eNB PC5 that the bearer release is completed through the RRC reconfiguration message.

Example 7

In the above example, before the w-UE forwards the data through the r-UE (w-UE communicates with the r-UE for PC5), 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.

Example 8

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. Following the access mode: D2D, WLAN, BlueTooth);

Step 2: 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 . When any field in the relay support indication information changes, the relay sends the relay support update information to the eNB for updating/modifying/reconfiguring any field in the relay support indication information.

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;

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 identifier, the QoS parameter, and the eNB GTP tunnel termination point; the base station may send the relay forwarding request information through the RRC reconfiguration message. 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. It is checked whether there is an established Uu DRB dedicated to forwarding w-UE data that satisfies the QoS requirement, and it is determined that the established Uu bearer dedicated to forwarding w-UE data can be admitted. Then, 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.

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.

Example 9

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.

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).

Example 10

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;

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. Uu bearer; then, 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 After the Uu bearer of the w-UE data is forwarded, 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. In order to enable the MME/eNB to distinguish between the EPS bearer/Uu DRB for transmitting its own data and the EPS bearer/Uu DRB for forwarding w-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.

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. For 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.

Example 11

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 The uplink/downlink forwarding indication, the PC5 aggregation maximum bit rate of the w-UE (UE-PC5-AMBR); thus, if the relay r-UE also moves to the eNB2, the w-UE and the r-UE remain connected. / association, 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. Switch to eNB2;

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. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

S1. 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.

S2: The UE is configured according to the configuration information of the PC5 interface.

Optionally, in this embodiment, 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). A variety of media that can store program code, such as Access Memory), removable hard disk, disk, or optical disk.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

Through the description of the above embodiments, those skilled in the art can clearly understand that 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. Based on such understanding, 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.

It will be apparent to those skilled in the art that the various 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. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

As described above, 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.

Claims

A communication method for a device through system includes:

The user equipment 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 UE is configured according to the configuration information of the PC5 interface.
The method of claim 1, wherein the PC5 interface configuration information comprises 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 method according to claim 1, wherein the UE comprises: a remote UE and/or a relay UE; and the UE receiving the PC5 interface configuration information includes:

Receiving, by the remote UE, PC5 bearer configuration information sent by the base station; and/or

Receiving, by the relay UE, PC5 bearer configuration information sent by the base station; and/or

Receiving, by the remote UE or the relay UE, relay forwarding indication information sent by the base station; and/or

The remote UE receives mapping information between a PC5 logical channel group and a Uu logical channel priority sent by the base station, or mapping information between a PC5 data packet priority and a Uu bearer QCI; and/or

The relay UE receives mapping information between a PC5 logical channel group of the remote UE and a Uu logical channel priority sent by the base station.
The method according to claim 2, wherein the PC5 bearer configuration information comprises one or any combination of the following: PC5 bearer setup configuration information; PC5 bearer modification configuration information; and PC5 bearer release information.
The method according to claim 2 or 4, wherein the PC5 bearer setup configuration information in the PC5 bearer configuration information comprises at least one of the following:

PC5 bearer identification, radio link control protocol acknowledgement mode RLC AM configuration information, Radio link control protocol non-acknowledgment mode RLC UM configuration information, logical channel identifier LC ID, logical channel group identifier LCG ID, priority guaranteed bit rate PBR, bucket size duration BSD, UE PC5 interface aggregate maximum bit rate, PC5 carries QoS information .
The method of claim 5, wherein the PC5 bearer QoS information comprises at least one of: a quality of service level QCI, a guaranteed bit rate GBR, a maximum bit rate MBR.
The method of claim 5, wherein

The RLC AM configuration information includes at least one of the following: RLC AM sequence number length, polling retransmission timer, polling protocol data unit, polling byte number, maximum retransmission threshold, reordering timer, status prohibiting timing The RLC UM configuration information includes at least one of the following: a non-acknowledged mode sequence number field length, a maximum number of retransmissions, and a reordering timer.
The method of claim 5, wherein

The PC5 bears 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 method of claim 4, wherein

The PC5 bears the configuration information for updating or reconfiguring any combination of the field 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 to be released, and a release reason.
The method according to claim 1 or 2, wherein the relay forwarding indication information received by the remote UE comprises at least one of: a relay UE identifier, a control plane forwarding indication, a user plane forwarding indication, and 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, and the downlink data forwarding indication corresponding to each EPS bearer. The EPS bearers corresponding uplink and downlink data forwarding indications.

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 an uplink forwarding indication of the remote UE. Downward forwarding indication of the UE, relayed remote The uplink data forwarding indication, the downlink data forwarding indication, the uplink and downlink data forwarding indication, and the EPS bearer information of the remote UE that is forwarded by the UE, wherein the EPS bearer information includes at least one of the following: an EPS bearer identifier , QCI, GBR, MBR.
The method according to claim 1, wherein the UE is configured according to the PC5 interface configuration information, including:

The remote UE establishes or modifies or releases the PC5 bearer with the relay UE.
The method of claim 11, wherein the establishing, by the remote UE, the PC5 bearer with the relay UE comprises:

The remote UE sends the PC5 bearer setup configuration information to the relay UE; the remote UE receives the PC5 bearer setup completion information sent by the relay UE; 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 method according to claim 12, wherein after the remote UE sends the PC5 bearer setup configuration information to the relay UE, the method further includes:

Receiving, by the relay UE, PC5 bearer setup configuration information sent by the remote UE; and/or

The relay UE performs admission control on the remote UE; 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 method according to claim 12, wherein the relaying UE performs admission control on the remote UE, including:

The relaying UE determines whether to accept the establishment of a new one according to the received PC5 bearer QoS information in the PC5 bearer setup configuration information sent by the remote UE and the number of PC5 bearers and resource load conditions established by the relay UE. PC5 bearer; or

The relaying UE sends the remote UE identifier to the base station, and the base station determines whether to allow the relay UE to accept the establishment of the PC5 bearer according to the resource scheduling or allocation situation.
The method of claim 13, wherein the relaying UE determines whether to establish a forwarding Uu bearer, including:

The relaying UE determines, according to the PC5 bearer QoS information in the PC5 bearer setup configuration information and the EPS bearer list information maintained by the relay UE, whether the forwarding Uu bearer meets the requirements, if not And the relaying UE sends a service request, a bearer resource allocation request, or a bearer resource modification request to the network, and establishes or modifies the forwarding Uu bearer.
The method according to claim 15, wherein the service request, the bearer resource allocation request or the bearer resource modification request message sent by the relay UE to the network carries a forwarding bearer indication, where the forwarding bearer indication is used for the network The bearer is indicated to be used to forward remote UE data.
The method according to claim 3, wherein after the relaying UE receives the relay forwarding indication information sent by the base station, the method further includes:

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 relay forwarding response information to the base station.
The method according to claim 17, wherein the relay forwarding response information comprises: relay forwarding acceptance information or relay forwarding rejection information, wherein the relay forwarding acceptance information comprises: permission of the remote UE to pass Following the forwarded EPS list and rejecting the EPS list forwarded through the relay.
The method of claim 17, wherein the method further comprises: after the relay UE receives the PC5 bearer configuration information sent by the base station or the relay UE sends the relay forwarding response information to the base station, the method further includes:

The relay UE receives the setup configuration information of the forwarded Uu bearer from the base station; the setup configuration information of the forwarded Uu bearer includes at least one of the following: a Uu DRB identifier, a packet data convergence protocol, a PDCP configuration, an RLC configuration, a logical channel identifier, and a logical channel. Configuration.
The method of claim 3 wherein said remote UE receives a base station Before sending the relay forwarding indication information, including:

The remote UE sends the relay forwarding interest indication information to the base station by using the RRC dedicated signaling, where the relay forwarding interest indication information includes at least one of the following: a relay forwarding interest, a control plane forwarding indication, and a user plane forwarding indication. The uplink forwarding indication, the downlink forwarding indication, and the EPS bearer list that is expected to be forwarded by the relay.
The method according to claim 1, wherein the UE is configured according to the PC5 interface configuration information, including at least one of the following:

The remote UE or the relay UE establishes configuration information according to the received PC5 bearer, completes the PC5 bearer configuration, and sends an RRC reconfiguration complete message to the base station to notify the PC5 that the bearer setup is completed.

The remote UE or the relay UE performs configuration modification on the PC5 bearer according to the received PC5 bearer, completes the PC5 bearer modification, and sends an RRC reconfiguration complete message to the base station to notify the PC5 that the bearer modification is completed;

The remote UE or the relay UE completes the release of the PC5 bearer according to the received release information of the PC5 bearer;

The remote UE associates the data of the EPS bearer that needs to be forwarded by the relay UE according to the received relay forwarding indication information and the mapping information of the PC5 data packet priority PPPP and the Uu bearer QCI, and associates the corresponding PPPP according to the QCI of the EPS bearer. And transmitting the data through the PC5 interface;

The remote UE associates the data of the EPS bearer that needs to be forwarded by the relay UE with the corresponding PPPP according to the received relay forwarding indication information and the mapping information of the pre-configured PPPP and Uu bearer QCI, and transmits the corresponding PPPP through the PC5 interface. Data

The remote UE associates the data of the EPS bearer that needs to be forwarded by the relay UE with the corresponding PPPP according to the received relay forwarding indication information and the mapping information between the PC5 logical channel group and the Uu logical channel priority, and passes the corresponding PPPP. The PC5 interface transmits the data;

The remote UE according to the received PC5 bearer setup configuration information, the PC5 bearer identifier or the PC5 logical channel identifier or the PC5 bearer identifier generated by the remote UE or the PC5 The one-to-one correspondence between the logical channel identifier and the EPS bearer identifier or the Uu DRB identifier or the Uu logical channel identifier of the corresponding EPS bearer, and the data of the EPS bearer that needs to be forwarded by the relay UE is mapped to the corresponding PC5 bearer/PC5 logical channel transmission.
A communication method for a device through system includes:

The remote user equipment UE accesses and/or connects to the relay UE;

The remote UE forwards data through the relay UE.
The method according to claim 22, wherein the relay access mode supported by the remote UE and the relay UE comprises at least one of: a sidelink or a PC5 interface, a WLAN, a Bluetooth BlueTooth; The sidelink or PC5 accesses/connects to the relay UE; or the remote UE accesses the relay UE through the WLAN; or the remote UE accesses the relay UE through the BlueTooth.
The method of claim 22, wherein the method further comprises: before the remote UE accesses and/or connects to the relay UE, the method further comprising:

The remote UE receives the relay related configuration information sent by the base station, where the relay related configuration information is used by the remote UE to discover, measure, select, and access the relay UE;

The remote UE completes configuration according to the relay related configuration information.
The method of claim 24, wherein the relay related configuration information comprises at least one of the following:

Relay measurement threshold, relay discovery threshold, relay selection threshold, relay selection hysteresis value, relay discovery transmission/reception resource, WLAN measurement threshold, WLAN measurement configuration information, WLAN selection threshold, WLAN selection hysteresis value, BlueTooth selection threshold , BlueTooth selects the hysteresis value.
The method according to claim 24, wherein before the remote UE receives the relay related configuration information sent by the base station, the method further includes:

The remote UE sends a relay forwarding interest indication to the base station.
The method of claim 26, wherein

The 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 relay forwarding. The EPS bearer identifier or the DRB identifier or the logical channel identifier, and 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 according to claim 24, wherein before the remote UE receives the relay related configuration information sent by the base station, the method further includes:

The relay UE sends relay support indication information or relay support update information to the base station, where the relay support update information is used to update/modify/reconfigure any field in the relay support indication information.
The method according to claim 28, wherein the relay support indication information comprises at least one of: a relay UE identity, a relay support indication, a supported relay access mode, WLAN information, and BlueTooth information.
The method according to claim 29, wherein the WLAN information comprises: WLAN terminal WT identifier, WLAN identifier, 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.
The method of claim 24, wherein the completing, by the remote UE, the configuration according to the relay related configuration information comprises:

Performing, by the remote UE, a relay measurement or a relay discovery or a WLAN measurement, and reporting the measurement result to the base station; or

The remote UE performs relay measurement or relay discovery or WLAN measurement, and selects a hysteresis value or a WLAN measurement result or a WLAN selection threshold or a WLAN selection hysteresis value or a BlueTooth selection threshold according to a relay measurement result or a relay selection threshold or a relay selection threshold or a relay. Or BlueTooth selects the hysteresis value and chooses to relay UE or WLAN or BlueTooth.
The method according to claim 31, wherein after the remote UE reports the measurement result to the base station, the method includes:

The base station selects a relay UE for the remote UE, and notifies the selected relay UE of the remote UE by using RRC dedicated signaling; the notification of the selected relay UE by the RRC dedicated signaling The UE includes: the ProSe layer 2 of the relay UE identifies 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 according to claim 22, wherein after the remote UE accesses and/or connects to the relay UE, the method includes:

The remote UE or the relay UE sends a relay connection status report to the base station; the relay connection status report includes at least one of: a WLAN MAC address of the remote UE, and a 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 method according to claim 22, wherein before the remote UE forwards data by the relay UE, the method includes:

The relay UE receives relay forwarding request information sent by the base station;

The relay UE sends relay forwarding response information to the base station.
The method according to claim 34, wherein the relay forwarding request information comprises at least one of: a WLAN MAC address of the remote UE, a ProSe UE ID of the remote end, and an expected pass of the remote end Relayed E-RAB identity, QoS parameters, eNB GTP tunnel endpoint.
The method of claim 34, wherein the relay forwarding response information comprises at least one of: allowing an E-RAB identification list forwarded by the relay, rejecting the E-RAB identification list forwarded by the relay.
The method according to claim 34, wherein after the relay UE receives the relay forwarding request information sent by the base station, the method includes:

The relay UE performs admission control on the E-RAB that is expected to be forwarded by the relay in the relay forwarding request, and the relay UE determines, according to the bearer situation of the relay UE, whether there is an established forwarding that meets the QoS requirement. Uu bearers, and determining forwarding Uu bearers that are allowed to be established;

After the relay UE initiates the establishment of the corresponding 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 forwarded Uu bearer to the middle. Following the UE.
The method according to claim 37, wherein the forwarding Uu bearer configuration information sent by the base station to the relay UE comprises 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 according to claim 22, wherein before the remote UE forwards data through the relay UE, the method includes:

The remote UE receives the relay forwarding indication information sent by the base station, where the relay forwarding indication information includes at least one of the following: a control plane forwarding indication, a user plane forwarding indication, an uplink forwarding indication, and a downlink forwarding indication, The forwarded EPS bearer identifier can be forwarded by the relayed DRB identifier, and can be forwarded by the logical channel identifier, and each EPS bearer corresponding uplink data forwarding indication, downlink data forwarding indication, uplink and downlink data forwarding indication.
A communication method for relaying a device through a system, comprising:

The base station receives the relay related configuration information;

The base station performs processing corresponding to the relay related configuration information according to the relay related configuration information.
The method of claim 40, wherein the receiving, by the base station, the relay related configuration information comprises:

Obtaining, by the base station, the relay related configuration information from a mobility management entity MME through an S1 interface; or

The base station acquires the relay related configuration information from a neighboring base station or a target base station by using an X2 interface.
The method according to claim 40, wherein the relay related configuration information comprises at least one of: relay forwarding interest/request, relay forwarding bearer indication, remote end The UE identity, the access mode, the relaying UE identity, the control plane forwarding indication, the user plane forwarding indication, the uplink forwarding indication, the downlink forwarding indication, the uplink and downlink forwarding indication, and the UE PC5 aggregation maximum bit rate; wherein, the access mode includes: D2D access, WLAN access, BlueTooth access.
The method according to claim 41, wherein the base station acquires the relay related configuration information from an MME through an S1 interface, including 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;

Obtaining, by the base station, the relay related configuration information from an 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 base station acquires the relay related configuration information from the MME by using an MME configuration transmission message of the S1 interface.
The method according to claim 41, wherein the base station acquires relay related configuration information from the neighboring/target base station through the X2 interface, including at least one of the following:

The base station acquires the relay related configuration information from a neighboring base station or a target base station by using a handover request message of the X2 interface;

The 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 acquires relay related configuration information from a neighboring base station or a target base station by using a base station configuration transmission message of the X2 interface.
The method according to claim 41, wherein before the base station acquires the relay related configuration information from the MME through the S1 interface, the method includes:

The MME receives relay related configuration information sent by the remote UE or the relay UE.
The method of claim 45, wherein the method further comprises: The remote UE or the relay UE sends 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 method according to claim 40, wherein the base station performs processing corresponding to the relay related configuration information according to the relay related configuration information, including:

If the base station receives a relay forwarding interest or a relay forwarding request, the base station selects or configures a relay UE for the remote UE; and/or, the base station sends a relay forwarding bearer setup request to the relay UE, and the base station receives the Relaying a bearer setup response sent by the UE;

If the base station receives the relay forwarding bearer indication, the base station distinguishes the Uu bearer of the relay UE and the Uu bearer of the relay UE forwarding data according to the relay forwarding bearer indication, so as to correctly map the downlink remote UE data to the corresponding Uu. Carry

If the base station receives at least one of the following relay related configuration 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, the base station saves and receives The relay related configuration information, and performing measurement configuration, resource configuration, and/or bearer configuration on the remote UE and/or the relay UE according to different access modes;

If the base station receives the UE PC5 aggregate maximum bit rate UE-PC5-AMBR, the base station performs PC5 resource configuration for the remote UE or the relay UE according to the UE-PC5-AMBR.
The method of claim 47, wherein the method further comprises:

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 performs PC5 communication according to the UE-PC5-AMBR autonomously selecting resources.
The method according to claim 47, wherein

The relay forwarding bearer setup request includes at least one of: a WLAN MAC address of the remote UE, a ProSe UE ID of the remote UE, and a desired end of the remote UE. Following the forwarded E-RAB identity, QoS parameters, eNB GTP tunnel termination point; and/or

The relay forwarding bearer setup response information includes at least one of: allowing an E-RAB identifier list forwarded by the relay, and rejecting the E-RAB identifier list forwarded by the relay.
The method according to claim 47, wherein after the base station sends the relay forwarding bearer setup request information to the relay UE, the method includes:

The relay UE performs admission control on the E-RAB that is expected to be forwarded by the relay in the relay forwarding bearer setup request, and the relay UE determines, according to its own bearer situation, whether there is an established forwarding Uu bearer that satisfies the QoS requirement, and Determining the forwarding Uu bearer that is allowed to be established;

After the relay UE initiates the establishment of the corresponding EPS bearer, or the base station receives the relay forwarding bearer setup response information sent by the relay UE, the base station sends the configuration information of the forwarded Uu bearer to the medium. Following the UE.
A communication method for relaying a device through a system, comprising:

The base station sends the PC5 interface configuration information to the user equipment UE, where the PC5 interface configuration information is used to configure the UE support device to device D2D communication function.
The method of claim 51, wherein the PC5 interface configuration information comprises 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 method according to claim 51, wherein the UE comprises: a remote UE and/or a relay UE; and the base station sends the PC5 interface configuration information to the UE, including:

Sending, by the base station, PC5 bearer configuration information to the remote UE; and/or

Sending, by the base station, PC5 bearer configuration information to the relay UE; and/or

The base station sends the relay forwarding indication information to the remote UE or the relay UE; and/or the remote UE receives the PC5 logical channel group and the Uu logical channel that are sent by the base station. Mapping information between the first level or mapping information of the PC5 packet priority and Uu carrying QCI; and/or

The relay UE receives mapping information between a PC5 logical channel group of the remote UE and a Uu logical channel priority sent by the base station.
The method according to claim 51, wherein the UE comprises: a remote UE and a relay UE; the method further comprises: the base station receiving a remote UE identifier sent by the relay UE; The resource scheduling or allocation case determines whether the relay UE is allowed to accept the establishment of a PC5 bearer.
The method according to claim 52, wherein before the base station sends the PC5 interface information to the remote UE, the method includes:

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 relay forwarding interest indication information includes at least one of the following: a relay forwarding interest, a control plane forwarding indication, and a user plane. The forwarding indication, the uplink forwarding indication, the downlink forwarding indication, and the EPS bearer list that is expected to be forwarded by the relay.
The method according to claim 53, wherein after the base station sends the relay forwarding indication information to the relay UE, the method further includes:

The base station receives the relay response information sent by the relay UE, where the relay response information includes: relay forwarding acceptance information or relay forwarding rejection information, where the relay forwarding acceptance information includes: a remote end The UE's EPS list allowed to be forwarded through the relay and the EPS list that is forwarded through the relay is rejected.
The method of claim 51, wherein, when the UE is a relaying UE, the base station sends the PC5 interface configuration information to the relaying UE, the method further comprising:

The base station sends the setup configuration information of the Uu bearer to the relay UE. The setup configuration information of the forwarding Uu bearer includes at least one of the following: a Uu DRB identifier, a packet data convergence protocol, a PDCP configuration, an RLC configuration, and a logical channel identifier. Logical channel configuration.
A communication device of a device through-through system is applied to a user equipment UE, and the device includes:

The receiving module is configured to receive configuration information of the PC5 interface, where the configuration information of the PC5 interface is used to configure a 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.
The apparatus of claim 58, wherein the PC5 interface configuration information comprises 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 .
A communication device of a device through-through system is applied to a remote user equipment UE, and the device includes:

An access module, configured to access and/or connect to the relay UE;

a forwarding module configured to forward data through the relay UE.
The apparatus according to claim 60, wherein the relay access mode supported by the remote UE and the relay UE comprises at least one of: a sidelink or a PC5 interface, a WLAN, a Bluetooth BlueTooth; The sidelink or PC5 accesses/connects to the relay UE; or the remote UE accesses the relay UE through the WLAN; or the remote UE accesses the relay UE through the BlueTooth.
A communication system includes: 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 configuration information of the PC5 interface is used. The UE supports device-to-device D2D communication function.
A communication system includes: a remote user equipment UE and a relay UE, wherein the remote UE is used to access and/or connect to a relay UE, and forward data through the relay UE.