WO2016161764A1

WO2016161764A1 - Relay bearer control method and apparatus, and computer storage medium

Info

Publication number: WO2016161764A1
Application number: PCT/CN2015/089661
Authority: WO
Inventors: 陈琳
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-04-09
Filing date: 2015-09-15
Publication date: 2016-10-13
Also published as: CN106162512A

Abstract

Disclosed is a relay bearer control method, comprising: acquiring a first rule; and executing, according to the acquired first rule, the mapping of a device to device (D2D) bearer and a honeycomb bearer and/or the D2D bearer and another D2D bearer, wherein the mapping of the D2D bearer and the honeycomb bearer is the mapping of a bearer between a relay UE and a remote UE and a bearer between the relay UE and a network side, and the mapping of the D2D bearer and the other D2D bearer is the mapping of a bearer between the relay UE and the remote UE and a bearer between the relay UE and an opposite remote UE. Also disclosed are a relay bearer control apparatus and a computer storage medium.

Description

Relay bearer control method, device and computer storage medium

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a relay bearer control method, apparatus, and computer storage medium.

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. Traditional base-centered cellular networks have significant limitations in supporting high data rates and proximity services. In this context, device-to-devices (D2D, Device-to- Device) 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. The current D2D is also known as ProSe (Proximity Services) or Sidelink Transmission.

D2D technology can work in licensed or unlicensed frequency bands, allowing multiple D2D-enabled user equipments (D2D User Equipment, D2D UEs) to be directly connected to the network infrastructure or without network infrastructure. Discovery / direct communication. There are three main application scenarios for D2D:

1) UE1 and UE2 perform data interaction under the coverage of the cellular network, and the user plane data does not pass through the network infrastructure, as shown in mode 1 in FIG. 1;

2) UE relay transmission in the weak/uncovered area, as shown in Figure 1, mode 2, allow the letter The poor quality UE4 communicates with the network through the UE3 with network coverage nearby, which can help operators expand coverage and increase capacity.

3) In the event of an earthquake or emergency, the cellular network can not work normally, allowing direct communication between devices, as shown in Figure 3, mode 3, the control plane and user plane between UE5, UE6 and UE7 do not go through the network foundation. One-hop or multi-hop data communication for the facility.

D2D technology usually includes D2D discovery technology and D2D communication technology. The D2D discovery technology refers to a technology for determining/determining whether the first user equipment is adjacent to the second user equipment. Generally, the D2D user equipment can discover the other party by sending or receiving the discovery signal/information; the D2D communication technology refers to the D2D. A technique in which some or all of the communication data between user equipments can communicate directly without going through the network infrastructure.

For the UE-to-Network Relay scenario corresponding to mode 2 in Figure 1, UE3 can communicate with the network side using the existing Long Term Evolution (LTE) mode, and can also serve as a relay and out of coverage. The terminal (UE4 in Figure 1) communicates using D2D mode, including D2D Discovery and/or D2D communication. If the UE4 that is out of coverage or has a poor signal transmits data to the base station through the UE3 in the coverage, the UE4 is referred to as a remote UE (Remote UE), and the UE3 is a relay UE (Relay UE). Similarly, for the UE-to-UE relay scenario corresponding to mode 3 in FIG. 1, UE6 can forward data packets between UE5 and UE7, UE6 can be called a relay user, and UE5 can be called a remote end. User, UE7 can be called a peer remote user.

The prior art does not provide a system perfect solution for the relay bearer control mechanism in the relay mode of the second mode and the third mode.

Summary of the invention

In order to solve the existing technical problems, embodiments of the present invention provide a relay bearer control method, apparatus, and computer storage medium.

The technical solution of the present invention is implemented as follows:

An embodiment of the present invention provides a method for controlling a relay bearer, where the method includes:

Obtain the first rule;

Performing mapping of the device-to-device D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the obtained first rule; wherein the mapping between the D2D bearer and the cellular bearer is between the relay UE and the remote UE Mapping the bearer between the relay UE and the network side, the mapping between the D2D bearer and the D2D bearer is a bearer between the relay UE and the remote UE, and the relay UE and the remote end UE The mapping between the bearers.

In the above solution, the first rule includes at least one of the following:

Carrying the corresponding service flow template TFT; the quality of service level identifier QCI; the logical channel identifier of the bearer; the logical channel group identifier of the bearer; the priority of the bearer; the priority of the remote UE; the priority of the D2D communication group/packet Whether the bearer guarantees the bit rate; the data corresponding to the differential service code point DSCP; the default D2D or cellular bearer.

In the above solution, before performing mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the obtained first rule, the method further includes:

When the remote UE accesses, or when the remote UE initiates the service request/bearer setup request/bearer modification request, or receives the D2D data sent by the remote UE, the D2D bearer configuration/reconfiguration is initiated to the remote end UE. , establishing a corresponding D2D bearer; and/or

When the relay function is activated, or when the remote UE accesses, or when the remote UE initiates a service request/bearer setup request/bearer modification request, or receives D2D data sent by the remote UE, initiates a service request to the network/ The resource allocation request/bearer resource modification request is carried, and the corresponding cellular bearer is established/updated.

In the foregoing solution, when the first rule is to carry the corresponding TFT, the step of performing mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the first rule includes:

And mapping the received D2D data to the cellular bearer according to the uplink service flow template UL TFT corresponding to the cellular bearer; or determining, according to the packet filter corresponding to the UL TFT, the cellular bearer that matches the received D2D data, And when it finds a matching cellular bearer, it will receive it. D2D data is mapped to the matched cellular bearer; or

The received D2D data or cellular data is mapped to the D2D bearer according to the TFT corresponding to the D2D bearer.

In the foregoing solution, the mapping, by the TFT corresponding to the D2D bearer, the received D2D data or the cellular data to the D2D bearer includes:

Determining, by the packet filter corresponding to the downlink service flow template DL TFT of the D2D bearer of the remote UE, the D2D bearer that matches the cellular data, where the packet filter corresponding to the D2D bearer DL TFT is corresponding to the cellular bearer uplink TFT The source and destination IPs and the port number corresponding to the packet filter are obtained by inversion; or, the D2D bearer matching the D2D data is determined according to the packet filter corresponding to the TFT of the D2D bearer of the remote end UE;

Upon finding a matching D2D bearer, the received D2D or cellular data is mapped to the matched D2D bearer.

In the above solution, when a matching D2D bearer or a cellular bearer cannot be found, the method further includes:

Discard the received data; or

Initiating a D2D bearer configuration/reconfiguration to the remote UE or the remote end UE, and establishing a corresponding D2D bearer; or initiating a service request/bearer resource allocation request/bearer resource modification request to the network to establish/update a corresponding cellular bearer; After the D2D bearer or cellular bearer configuration is completed, the received cellular data or D2D data is mapped to the configured D2D or cellular bearer.

In the above solution, when the first rule is the bearer QCI, the step of performing mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the first rule includes:

Mapping the D2D data to a cellular bearer or a D2D bearer of the same QCI according to the QCI of the D2D bearer corresponding to the received D2D data; or

Mapping the received cellular data to a D2D bearer of the same QCI according to the QCI of the bearer corresponding to the received cellular data; or

Mapping D2D data received by multiple QCI D2D bearers to a QCI cellular carrier Load or D2D bearer; or

The cellular data received by the plurality of QCI cellular bearers is mapped to a Q2 D2D bearer.

In the foregoing solution, when the first rule is the logical channel identifier of the bearer, the step of performing mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the first rule includes:

Mapping the D2D data to a cellular bearer or a D2D bearer of the same logical channel identifier according to the logical channel identifier of the D2D bearer corresponding to the received D2D data; or

The received cellular data is mapped to the D2D bearer of the same logical channel identifier according to the logical channel identifier of the bearer corresponding to the received cellular data.

In the above solution, when the first rule is the logical channel group identifier of the bearer, the step of performing mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the first rule includes:

And mapping the received D2D data to any cellular bearer or D2D bearer of the same logical channel group identifier according to the logical channel group identifier of the D2D bearer corresponding to the received D2D data; or

The received cellular data is mapped to any D2D bearer of the same logical channel group identifier according to the logical channel group identifier of the cellular bearer corresponding to the received cellular data.

In the foregoing solution, when the first rule is the priority of the bearer, the step of performing mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the first rule includes:

And mapping the received D2D data to a cell bearer or a D2D bearer of the same priority according to a priority of the D2D bearer corresponding to the received D2D data; or

The received cellular data is mapped to D2D bearers of the same priority according to the priority of the cellular bearer corresponding to the received cellular data.

In the foregoing solution, when the first rule is the priority of the remote UE, the step of performing mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the first rule includes:

The received D2D data is mapped to a corresponding priority cellular bearer according to the priority of the D2D UE corresponding to the received D2D data.

In the above solution, when the first rule is the priority of the D2D communication group/data packet, the step of performing mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the first rule includes:

The received D2D data is mapped to a corresponding priority cellular bearer according to the priority of the D2D communication group/data packet corresponding to the received D2D data.

In the above solution, the first rule is: when the bearer guarantees the bit rate, the step of performing mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the first rule, including:

Mapping the received D2D data of the bit rate D2D bearer to the guaranteed bit rate of the cellular bearer or D2D bearer; or

Mapping the received cellular data of the guaranteed bit rate cellular bearer to a guaranteed bit rate D2D bearer; or

Mapping D2D data received by a non-guaranteed bit rate D2D bearer to a non-guaranteed bit rate cellular bearer or D2D bearer; or

The cellular data received by the non-guaranteed bit rate cellular bearer is mapped to the D2D bearer of the non-guaranteed bit rate.

In the foregoing solution, when the first rule is the DSCP corresponding to the data, the step of performing mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the first rule includes:

And performing DSCP identification on the received D2D data according to the QCI of the D2D bearer corresponding to the received D2D data, and then mapping the DSCP information according to the D2D data to the cellular bearer or the D2D bearer corresponding to the QCI; or

The received cellular data is DSCP-identified according to the QCI of the bearer corresponding to the received cellular data, and then mapped to the D2D bearer corresponding to the QCI according to the DSCP information of the cellular data.

In the foregoing solution, when the first rule is a default D2D or a cellular bearer, the step of performing mapping of a D2D bearer and a cellular bearer and/or a D2D bearer and a D2D bearer according to the first rule, include:

Mapping the received D2D data to a default cellular bearer or a default D2D bearer; or

Map the received cellular data to the default D2D bearer.

An embodiment of the present invention further provides a relay bearer control device, where the device includes:

a rule obtaining unit configured to obtain a first rule;

a mapping unit, configured to perform device-to-device D2D bearer mapping with a cellular bearer and/or a D2D bearer and a D2D bearer according to the obtained first rule; where the mapping between the D2D bearer and the cellular bearer is a relay UE and a far a mapping between a bearer between the UEs and a bearer between the UE and the network side, where the mapping between the D2D bearer and the D2D bearer is a bearer between the relay UE and the remote UE and the relay UE and Mapping of bearers between remote end UEs.

In the above solution, the first rule includes at least one of the following:

In the above solution, the device further includes a bearer establishing unit,

When the remote UE accesses, or when the remote UE initiates the service request/bearer setup request/bearer modification request, or receives the D2D data sent by the remote UE, the D2D bearer configuration is initiated to the remote end UE/ Reconfigure, establish the corresponding D2D bearer; and / or

When the relay function of the relay UE is activated, or when the remote UE accesses, or when the remote UE initiates a service request/bearer setup request/bearer modification request, or receives D2D data sent by the remote UE, Initiating a service request/bearer resource allocation request/bearer resource modification request to the network, establishing/updating the corresponding cellular bearer.

In the above solution, when the first rule is to carry a corresponding TFT, the mapping unit is configured to

According to the uplink service flow template corresponding to the cellular bearer, the UL TFT will receive the received D2D data. Shooting to the cellular bearer; or, according to the packet filter corresponding to the UL TFT, determining a cellular bearer that matches the received D2D data, and mapping the received D2D data to the matched cellular bearer when the matching cellular bearer is found The matched cellular bearer; or

In the above solution, the mapping unit is configured to determine, according to a packet filter corresponding to the downlink service flow template DL TFT of the D2D bearer of the remote UE, a D2D bearer that matches the cellular data, where the D2D carries a packet corresponding to the DL TFT. The filter is obtained by inverting the source and destination IP and the port number corresponding to the packet filter corresponding to the uplink TFT of the cell; or determining the D2D according to the packet filter corresponding to the TFT of the D2D bearer of the remote UE of the remote end. Data matching D2D bearer;

In the foregoing solution, the mapping unit is configured to discard the received data when a matching D2D bearer or a cellular bearer cannot be found; or

In the foregoing solution, when the first rule is a bearer QCI, the mapping unit is configured to

Mapping D2D data received by multiple QCI D2D bearers to a QCI cellular bearer or D2D bearer; or

In the above solution, when the first rule is a logical channel identifier of a bearer, the mapping unit is configured to

In the above solution, when the first rule is a logical channel group identifier of a bearer, the mapping unit is configured to

In the foregoing solution, when the first rule is a priority of a bearer, the mapping unit is configured to

In the above solution, when the first rule is the priority of the remote UE, the mapping unit is configured to

The received D2D data is mapped to a corresponding priority cellular bearer for transmission according to the priority of the D2D UE corresponding to the received D2D data.

In the above solution, when the first rule is the priority of the D2D communication group/data packet, the mapping unit is configured to receive the received information according to the priority of the D2D communication group/data packet corresponding to the received D2D data. The D2D data is mapped to a corresponding bearer of the cell.

In the above solution, when the first rule is that the bearer guarantees the bit rate, the mapping unit is configured to

Mapping the received D2D data of the bit rate D2D bearer to a guaranteed bit rate cellular bearer or D2D bearer for transmission; or

In the above solution, when the first rule is a DSCP corresponding to the data, the mapping unit is configured to

In the above solution, when the first rule is a default D2D or a cellular bearer, the mapping unit is configured to

Map the received cellular data to the default D2D bearer.

The present invention provides a relay bearer control method and apparatus, and a computer storage medium. The UE with the relay capability can map the data packets received by the PC5 interface to the Uu bearer for forwarding according to a predetermined rule. Or, the data packet received by the Uu port is mapped to the PC5 interface for forwarding, and the purpose of the relay bearer control and the quality of service is achieved in this way.

DRAWINGS

Figure 1 Schematic diagram of device direct/system discovery/communication;

2 is a flowchart of a method for controlling a relay bearer according to Embodiment 1 of the present invention;

3(a) to 3(b) are schematic diagrams of relay bearer mapping of the device through-system of the present invention;

4 is a flowchart of a relay acquiring a first rule according to Embodiment 1 of the present invention;

5 is a flowchart of a UE-to-network relay according to Embodiment 2 of the present invention initiating establishment/modification of an EPS bearer for forwarding data of a remote UE;

6 is a flowchart of a UE to network relay initiated by a UE to establish a D2D bearer according to Embodiment 3 of the present invention;

7 is a flowchart of mapping a UE to a network relay according to a default bearer between a D2D bearer and a cellular bearer according to Embodiment 4 of the present invention;

8 is a flowchart of mapping a UE to a network relay according to a TFT between a D2D bearer and a cellular bearer according to the fifth embodiment of the present invention;

9 is a flowchart of mapping a UE to a network relay according to the QCI between a D2D bearer and a cellular bearer according to the sixth embodiment of the present invention;

10 is a flowchart of mapping between a D2D bearer and a cellular bearer according to a priority of the UE to network relay of Example 7 of the present invention;

11 is a flowchart of a UE to UE relay initiated to establish a D2D bearer according to Embodiment 8 of the present invention;

12 is a flowchart of UE-to-UE relay according to Example 9 of the present invention, according to whether a guaranteed bit rate bearer is mapped between a D2D bearer and a cellular bearer;

13 is a flowchart of mapping a UE to a UE relay according to a logical channel identifier or a logical channel group identifier between a D2D bearer and a D2D bearer according to Embodiment 10 of the present invention;

FIG. 14 is a schematic structural diagram of a relay bearer control apparatus according to Embodiment 2 of the present invention.

detailed description

The technical solutions of the present invention are further elaborated below in conjunction with the accompanying drawings and specific embodiments.

Embodiment 1

A first embodiment of the present invention provides a method for controlling a relay bearer of a device through-through system. As shown in FIG. 2, the method mainly includes:

In step 201, a first rule is obtained.

Step 202: Perform mapping of a D2D bearer and a cellular bearer and/or a D2D bearer and a D2D bearer according to the obtained first rule. The mapping between the D2D bearer and the cellular bearer is between the relay UE and the remote UE. Mapping the bearer between the relay UE and the network side, the mapping between the D2D bearer and the D2D bearer is a bearer between the relay UE and the remote UE, and the relay UE and the remote end UE The mapping between the bearers.

The method of the first embodiment of the present invention is applicable to a relay UE, and the so-called relay UE may be a UE in the mode 2 and mode 3 shown in FIG.

The cellular bearer refers to an Evolved Packet System (EPS) bearer or a Uu data bearer; the cellular bearer may be an EPS bearer dedicated to forwarding remote UE data or forwarding remote UE data and relay UE data multiplexing. Cellular bearer.

The D2D bearer refers to a bearer/logical channel/radio link control (RLC) entity/packet data convergence protocol (PDCP) established between the relay UE and the remote UE, or between the relay UE and the remote end UE. , Packet Data Convergence Protocol) entity. That is, the D2D bearer may also be represented by a D2D logical channel, a D2D RLC entity or a D2D PDCP entity; and, the D2D bearer may further include a D2D receiving bearer and/or a D2D transmitting bearer, and correspondingly, D2D receiving The bearer may also be represented as a D2D receive logical channel, a D2D RLC receive entity, or a D2D PDCP receive entity, and the D2D transmit bearer may also be represented as a D2D transmit logical channel, a D2D RLC transmit entity, or a D2D PDCP transmit entity.

The first rule includes at least one of the following: carrying the corresponding TFT; the QoS Class Identifier (QCI); the logical channel identifier of the bearer; the logical channel group identifier of the bearer; the priority of the bearer; Priority of the UE; priority of the D2D communication group/packet ("/" indicates the relationship); whether the bearer guarantees the bit rate; the differentiated services code point (DSCP) corresponding to the data; the default D2D or the cellular Hosted.

The method may further include: before the performing, by the relaying UE, the mapping between the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the first rule, the method further includes:

The relaying UE receives a predetermined mapping rule (ie, a first rule) sent by a base station or a ProSe function (based on a neighboring service function) entity or a Mobility Management Entity (MME); or

Relaying the UE with a pre-configured mapping rule (ie, the first rule); or

The system defines a relay UE default mapping rule (ie, the first rule).

When the remote UE accesses the remote UE, or when the remote UE initiates the service request/bearer setup request/bearer modification request, or receives the D2D data sent by the remote UE, the relay UE initiates the remote UE to the remote UE. D2D bearer configuration/reconfiguration, establishing corresponding D2D bearers; and/or

The relaying UE relays the UE when the relay function is activated, or when the remote UE accesses, or when the remote UE initiates a service request/bearer setup request/bearer modification request, or receives D2D data sent by the remote UE. Initiating a service request/bearer resource allocation request/bearer resource modification request to the network, establishing/updating the corresponding cellular bearer.

The relay UE determines whether the received data packet is sent to the relay UE, the remote UE, the remote end UE, or the network;

If the data is sent to the relay UE, the relay UE delivers the data to the upper layer;

If the data is sent to the remote UE, the relay UE maps the data to the D2D bearer established between the relay UE and the remote UE;

If the data is sent to the remote end UE, the relay UE maps the data to the D2D bearer established between the relay UE and the remote end UE;

If the data is sent to the network, the relaying UE maps the data to the cellular bearer.

The step of performing the mapping between the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the carried TFT, where the first rule is to carry the corresponding TFT, includes:

The relaying UE maps the received D2D data to the cellular bearer for transmission according to an uplink traffic flow template (UL TFT) corresponding to the cellular bearer; or the relay UE according to the UL TFT Corresponding packet filter determines a cellular bearer that matches the received D2D data, and when the matching cellular bearer is found, the relay UE maps the received D2D data to the matched cellular bearer for transmission; or

The relay UE maps the received D2D or cellular data to the D2D bearer according to the TFT corresponding to the D2D bearer for transmission.

The relaying UE mapping the received D2D data or the cellular data to the D2D bearer according to the TFT corresponding to the D2D bearer includes:

The relay UE determines, according to a packet filter corresponding to the downlink service flow template (DL TFT) of the D2D bearer of the remote UE, a D2D bearer that matches the cellular data; or, the relay UE is configured according to the remote end UE. a packet filter corresponding to the TFT of the D2D bearer determines a D2D bearer that matches the D2D data;

Upon finding a matching D2D bearer, the relay UE maps the received D2D or cellular data to the matched D2D bearer.

The method further includes: when the matched D2D bearer or the cellular bearer cannot be found, the method further includes:

The relay UE discards the received data; or

The relaying UE initiates a D2D bearer configuration/reconfiguration to the remote UE or the remote end UE, and establishes a corresponding D2D bearer; or the relay UE initiates a service request/bearer resource allocation request/bearer resource modification request to the network, Establishing/updating a corresponding cellular bearer; after the D2D bearer or cellular bearer configuration is completed, the relay UE maps the received cellular data or D2D data to the configured D2D or cellular bearer.

The step of performing the mapping between the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the QCI of the bearer, where the first rule is the bearer QCI, includes:

Transmitting, by the relay UE, the D2D data to a cellular bearer or a D2D bearer of the same QCI according to the QCI of the D2D bearer corresponding to the received D2D data; or

Transmitting, by the relay UE, the received cellular data to a D2D bearer of the same QCI according to the QCI of the bearer corresponding to the received cellular data; or

The relay UE maps D2D data received by multiple QCI D2D bearers to a QCI cellular bearer or D2D bearer for transmission; or

The relay UE maps cellular data received by a plurality of QCI cellular bearers to a QCI D2D bearer for transmission.

The step of performing the mapping between the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the logical channel identifier of the bearer, where the first rule is the logical channel identifier of the bearer, includes:

Transmitting, by the relay UE, the D2D data to a cellular bearer or a D2D bearer of the same logical channel identifier according to the logical channel identifier of the D2D bearer corresponding to the received D2D data; or

The relay UE maps the received cellular data to a D2D bearer of the same logical channel identifier according to the logical channel identifier of the bearer corresponding to the received cellular data for transmission.

The step of performing the mapping between the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the logical channel group identifier of the bearer, where the first rule is the logical channel group identifier of the bearer, includes:

The relaying UE maps the received D2D data to any cellular bearer or D2D bearer of the same logical channel group identifier according to the logical channel group identifier of the D2D bearer corresponding to the received D2D data; or

The relay UE maps the received cellular data to any D2D bearer of the same logical channel group identifier according to the logical channel group identifier of the cellular bearer corresponding to the received cellular data for transmission.

Wherein, when the first rule is a priority of a bearer, the performing according to a priority of the bearer The steps of mapping the D2D bearer to the cellular bearer and/or the D2D bearer and the D2D bearer include:

The relaying UE maps the received D2D data to a cellular bearer or a D2D bearer of the same priority according to the priority of the D2D bearer corresponding to the received D2D data; or

The relaying UE maps the received cellular data to a D2D bearer of the same priority for transmission according to the priority of the cellular bearer corresponding to the received cellular data.

The step of performing the mapping between the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the priority of the remote UE, where the first rule is the priority of the remote UE, includes:

The relaying UE maps the received D2D data to a corresponding priority cellular bearer according to the priority of the D2D UE corresponding to the received D2D data for transmission.

Wherein, when the first rule is the priority of the D2D communication group/data packet, the mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the priority of the D2D communication group/data packet corresponding to the data is performed. Steps include:

The relay UE maps the received D2D data to a corresponding priority cellular bearer according to the priority of the D2D communication group/data packet corresponding to the received D2D data for transmission.

The first rule is: when the bearer guarantees a bit rate, the step of performing mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to whether the bearer guarantees the bit rate, and the method includes:

The relay UE maps the received D2D data of the bit rate D2D bearer to a guaranteed bit rate cellular bearer or D2D bearer for transmission; or

The relay UE maps the cellular data received by the guaranteed bit rate cellular bearer to the guaranteed bit rate D2D bearer for transmission; or

The relay UE maps the D2D data received by the non-guaranteed bit rate D2D bearer to a non-guaranteed bit rate cellular bearer or D2D bearer for transmission; or

The relay UE maps the cellular data received by the non-guaranteed bit rate cellular bearer to the non-guaranteed bit rate D2D bearer for transmission.

The step of performing the mapping between the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the DSCP corresponding to the data, where the first rule is the DSCP corresponding to the data, includes:

The relaying UE performs DSCP identification on the received D2D data according to the QCI of the D2D bearer corresponding to the received D2D data, and then maps the DS2 information according to the D2D data to the cellular bearer or the D2D bearer corresponding to the QCI for transmission; or

The relay UE performs DSCP identification on the received cellular data according to the QCI of the bearer corresponding to the received cellular data, and then maps to the D2D bearer corresponding to the QCI according to the DSCP information of the cellular data for transmission.

When the first rule is a default D2D or a cellular bearer, the step of performing mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the default D2D or the cellular bearer includes:

The relay UE maps the received D2D data to a default cellular bearer or a default D2D bearer for transmission; or

The relay UE maps the received cellular data to a default D2D bearer for transmission.

Here, the default D2D bearer refers to a unique D2D transmission bearer established between the relay UE and the remote UE.

The relay UE initiates a service request/bearer resource allocation request/bearer resource modification request to the network, and establishes/updates a corresponding cellular bearer, including:

The service request/request bearer resource modification message sent by the relay UE to the MME includes QoS information related to the D2D service flow from the remote UE and packet filtering information that needs to be aggregated. The QoS information includes a QCI, a priority, a guaranteed bit rate, a maximum bit rate, a guaranteed bit rate, and the like; the packet filtering information includes an IP address, a port range, a QoS class identifier, a service type, and a protocol of the D2D service flow that is desired to be aggregated. Logo, etc.

The service request/request bearer resource modification message sent by the relay UE to the MME carries the relay related information, and is used to establish an EPS bearer dedicated to forwarding the remote UE data.

The serving base station of the relay UE receives the bearer setup and modification message sent by the MME, and may include Relay related instructions. The relay related information includes at least one of the following: a relay bearer indication, a priority of the remote UE, a priority of the communication group, a logical channel identifier corresponding to the bearer, a logical channel group identifier corresponding to the bearer, and a priority corresponding to the bearer. Whether it is the default bearer.

The relaying UE initiates a D2D bearer configuration/reconfiguration to establish/update a corresponding D2D bearer to the remote end UE, including:

The relay UE configures a corresponding D2D bearer and a mapping rule (ie, a first rule) according to the received D2D or cellular data and the QoS related information of the corresponding bearer.

The relay bearer control method in the embodiment of the present invention is further described in detail below with reference to a specific application scenario.

As shown in Figure 3 (a), the relay UE receives data from different PC5 D2D bearers of multiple remote UEs. When the relay UE forwards the data, it needs to be mapped to the Uu interface cellular bearer. Transfer. Similarly, the relay UE receives the data packet sent by the cellular bearer on the Uu interface, and if it needs to be forwarded to the remote UE, the relay UE also needs to consider mapping the data packet to the PC5 bearer established between the remote UE and the remote UE. transmission. Similarly, as shown in FIG. 3(b), the relay UE needs to consider mapping of D2D bearers between the remote UE and the remote UE.

With the method of the embodiment of the present invention, the UE with the relay capability can obtain a predetermined mapping/re-use rule (ie, the first rule), and then map the data packet received by the PC5 interface to the Uu bearer according to the rule. Or, the data packet received by the Uu port is mapped to the PC5 interface for forwarding, and the purpose of the relay bearer control and the quality of service is achieved in this way.

Specific specific relay bearer control methods and related signaling procedures are given below through specific examples.

Example 1

Users A and B use UE1 and UE2 having D2D functions, respectively. UE1 is in network coverage and UE2 is in network coverage. UE1 with network coverage is interested in becoming a relay The node provides a relay service for the UE without coverage, for example, UE1 is interested in becoming a UE-to-network relay.

If the UE1 is authorized to perform the D2D relay function, as shown in FIG. 4, the UE1 may receive the relay configuration information from the ProSe function entity or the MME, and the relay configuration information may include a bearer mapping rule (ie, the first rule). Before receiving the bearer mapping rule from the ProSe function entity or the MME, the UE1 may send a request message to the ProSe function entity or the MME to request to acquire the bearer mapping rule.

In addition to the method described in FIG. 4, UE1 may also pre-configure mapping rules or the system directly defines a relay UE default mapping rule.

Example 2

Users A and B respectively use UE1 and UE2 having D2D functions. UE1 is in network coverage and UE2 is in network coverage. UE1 in network coverage is interested in becoming a relay node, providing relay services for uncovered UEs.

It is assumed that the base station configures and activates the UE-to-network relay function of UE1, and UE1 acquires a predefined first rule from the base station. Before the relay UE1 performs mapping of the D2D bearer and the cellular bearer, the relay UE1 needs to establish the D2D bearer and the cellular bearer first.

The establishment of the D2D bearer may be that the corresponding logical channel, the RLC receiving entity, and the PDCP receiving entity are established when the relay UE1 receives the D2D data sent by the remote UE. The relay UE1 performs MAC/RLC/PDCP processing on the received D2D data, and then submits it to the upper layer. The upper layer can determine whether the data packet is sent to the relay UE1 or needs to be forwarded to the network through the IP packet header address. If it needs to be forwarded to the network, the UE1 determines whether the EPS bearer that can carry the data can be found according to the first rule. If not found, the relay UE1 initiates a bearer setup/modification process.

The relay UE1 may also determine whether the existing EPS bearer can accept the service flows corresponding to the D2D bearers when receiving the D2D bearer setup/modification request sent by the remote UE for sending the UE-to-Network service data. service quality. If it cannot be satisfied, the relay UE1 can Initiate the EPS bearer setup/modification process. If the existing EPS bearer can meet the requirements or the EPS bearer setup/modification initiated by the relay UE1 is accepted, the relay UE1 can accept the D2D bearer setup/modification request sent by the remote UE, and initiate the D2D bearer setup/modification process. .

In addition, when the UE-to-network relay function is activated, the relay UE1 may also initiate a new EPS bearer dedicated to forwarding the remote UE data packet, or request to modify the existing EPS bearer so that the subsequent bearer can be carried from the far side. The data packet of the UE.

The specific process of the bearer establishment/modification initiated by the relay UE1 is as shown in FIG. 5, which mainly includes:

In step 501, the relay UE1 sends a bearer resource allocation request/bearer resource modification request message to the MME, where the QoS information related to the D2D service flow from the remote UE and the packet filtering information that needs to be aggregated may be included. The QoS information includes a QCI, a priority, a guaranteed bit rate, a maximum bit rate, a guaranteed bit rate, and the like; the packet filtering information includes an IP address, a port range, a QoS class identifier, a service type, and a protocol of the D2D service flow that is desired to be aggregated. Logo, etc.

If the relay UE1 wants to establish an EPS bearer dedicated to forwarding the remote UE data, the bearer resource allocation request/bearer resource modification request message sent by the relay UE to the MME carries the relay bearer indication information for establishing dedicated for forwarding. EPS bearer of remote UE data. Further, the bearer resource allocation request/bearer resource modification request message may further include at least one of the following: the priority of the remote UE, the priority of the communication group, the logical channel identifier corresponding to the bearer, and the bearer corresponding to the bearer. The logical channel group identifier, the bearer corresponding priority, whether it is the default bearer, and so on.

The relay UE1 may perform step 501 after receiving the D2D data, or relaying the UE1 to initiate the relay function, or receiving the D2D bearer setup request.

Step 502: After receiving the message, the MME sends a bearer resource command to the SGW/PGW, where the QoS information, the packet filtering information, and the relay related information may be included in the bearer resource command.

Step 503: The SGW/PGW sends a Create Bearer Request or Update Bearer Request message to the MME.

Step 504: After receiving the message, the MME sends a bearer setup request/bearer modification request to the base station, where the MME may include the relay bearer indication and the relay related information.

Step 505: After receiving the bearer setup request/bearer modification request, the base station performs admission control to determine whether the air interface resource can meet the requirement. If yes, the base station sends a connection reconfiguration message to the relay UE1, including the newly added data bearer. And or modify existing data bearers. The reconfiguration message may further include non-access stratum (NAS) information including the newly established bearer or bearer modified QoS, TFT information, and relay related information.

Step 506: After completing the connection reconfiguration, the relay UE1 sends a connection reconfiguration complete message to the base station.

Step 507: After receiving the message, the base station sends a bearer setup response/bearer modification response message to the MME.

Step 508: After receiving the message, the MME sends a corresponding message to the SGW/PGW to establish a bearer corresponding message/update bearer.

So far, the EPS bearer setup/update for forwarding the remote UE data is completed. The bearer may be dedicated to relaying the UE1 to forward the data of the remote UE or the same EPS bearer as the service data of the relay UE1 itself. The relay UE1 can then map the received D2D data packets from the remote UE to these EPS bearers and send them to the network.

Example 3

Users A and B use UE1 and UE2 having D2D functions, respectively. UE1 is in network coverage and UE2 is in network coverage. UE1 in network coverage is interested in becoming a relay node, providing relay services for uncovered UEs.

It is assumed that the base station configures and activates the UE-to-network relay function of UE1, and the system pre-configures bearer mapping/multiplexing rules (ie, the first rule). Before the relay UE1 performs mapping of the D2D bearer and the cellular bearer, the relay UE1 needs to establish the D2D bearer and the cellular bearer first.

The process of the UE to the network relay to initiate the establishment of the D2D bearer, as shown in FIG. 6, mainly includes:

In step 601, it is assumed that the cellular EPS bearer of the relay UE1 has been established, and the SGW/PGW receives the data packet sent to the relay UE1, and the DL TFT maps the corresponding EPS bearer to the serving base station of the relay UE1.

Step 602: After receiving the data packet, the base station sends the data packet to the relay UE1 through the corresponding data bearer.

Step 603: After receiving the data packet, the relay UE1 determines whether it is sent to the relay UE1 or the remote UE accessed by the relay UE1 according to the destination address and the port number of the IP packet header. Assuming that the data packet is sent to the remote UE2 served by the relay UE1, the relay UE1 determines whether there is a corresponding D2D bearer according to the first rule. If there is no corresponding D2D bearer, the relay UE1 establishes a corresponding logical channel, an RLC transmitting entity, and a PDCP transmitting entity. Further, the relay UE1 may send a D2D bearer setup message to the remote UE, where the bearer corresponding UL TFT, QoS information, and relay related information are included (as shown in step 604 in the figure). After receiving the information, the remote UE2 establishes a D2D bearer according to the D2D bearer setup information, and sends a D2D bearer setup complete message to the relay UE1 (as shown in step 605 in the figure). In addition, relay UE1 may also trigger D2D bearer modification. Both the D2D bearer setup and the D2D modification process are delivered through the D2D connection reconfiguration message and the D2D connection reconfiguration complete message.

If the relay UE1 finds the corresponding D2D bearer according to the first rule, the relay UE1 transmits the data packet through the corresponding D2D bearer (as shown in steps 606-607 in the figure).

Example 4

Users A and B use UE1 and UE2 having D2D functions, respectively. UE1 is in network coverage and UE2 is in network coverage. UE1 in network coverage is interested in becoming a relay node, providing relay services for uncovered UEs. It is assumed that the UE1 activates the relay function to become the relay UE, and the remote UE2 selects and accesses the relay UE1. The first rule is obtained according to the methods of the first to third embodiments, and the D2D bearer and the cellular bearer are established.

As shown in FIG. 7, the relay UE1 receives the data sent from the remote UE2 to the network, and the relay UE1 maps it to the default EPS bearer, and then forwards it to the network through the default EPS bearer. Further, if the relay UE1 establishes an EPS bearer dedicated to relaying data according to the system definition, the relay UE1 maps the data packet sent from the remote UE2 to the network to the relay EPS. Hosted. In addition to the remote UE2, the data packets that are sent to the relay UE and sent to the network by the remote UEs of all other access relay UE1s are also forwarded through the default EPS bearer or the relay EPS bearer. Further, the default EPS bearer or the relay EPS bearer may be set to not allocate any uplink packet filter or set a packet filter capable of aggregating the corresponding service flows of all remote UEs.

When the relay UE1 receives the data packet from the network, the relay UE1 determines whether it is transmitted to the relay UE1 or the remote UE2 of its service according to the destination address and/or the port number of the IP header. Assuming that the received data packet destination is the far-end UE2, the relay UE1 directly maps the data packet to a unique D2D transmission bearer/D2D transmission logical channel/D2D transmission PDCP entity established with the remote UE2. Thereby the data is sent to the remote UE2.

Example 5

As shown in FIG. 8, the relay UE1 receives the data sent from the remote UE2 to the network, and the relay UE1 maps the received D2D data to the cellular bearer according to the UL TFT corresponding to the cellular bearer, that is, the relay UE1 corresponds to the UL TFT. The packet filter determines the cellular bearer that matches the D2D data. If a matching cellular bearer is found, the relay UE transmits the received D2D data through the matched cellular bearer. If the matching cellular bearer cannot be found, the relaying UE discards the received D2D data, or relays the UE1 to the network to initiate a bearer resource allocation request/bearer resource modification request to establish/update the corresponding cellular bearer according to the method described in Embodiment 2, requesting The TFT information corresponding to the service flow to be forwarded by the remote UE that the relay UE wants to aggregate is included. After the cellular bearer configuration is completed, the relay UE will receive the D2D data received from the remote UE and map it to the newly established or updated cellular bearer and transmit it to the network.

When the relay UE1 receives the data packet from the network, the relay UE1 determines whether it is transmitted to the relay UE1 or the remote UE2 of its service according to the destination address and/or the port number of the IP header. Assuming that the received data packet destination is the remote UE2, the relay UE1 maps the received cellular data to the D2D bearer according to the TFT corresponding to the D2D bearer established by the remote UE2, that is, the relay UE1 judges the remote UE2 one by one. The TFT corresponding to the established D2D bearer determines the D2D bearer matched with the cellular data according to the packet filter corresponding to the TFT. If the matched D2D bearer is found, the relay UE transmits the received cellular data through the matched D2D bearer. . If the matched D2D bearer cannot be found, the relay UE discards the data, or relays the UE to the remote UE2 to initiate D2D bearer configuration/reconfiguration to establish/update the corresponding D2D bearer according to the method described in Embodiment 2, and waits for the D2D bearer configuration. Upon completion, the relay UE1 maps the received cellular data to a newly established or updated D2D bearer for transmission.

Example 6

Users A and B use UE1 and UE2 having D2D functions, respectively. UE1 is in a network coverage state, and UE2 is in a cell edge coverage. UE1 in network coverage is interested in becoming a relay node, providing relay services for UEs without coverage or poor coverage. It is assumed that the UE1 activates the relay function to become the relay UE, and the remote UE2 selects and accesses the relay UE1. The first rule is obtained according to the methods of the first to third embodiments, and the D2D bearer and the cellular bearer are established.

As shown in FIG. 9, the relay UE1 receives the data sent from the remote UE2 to the network, and the relay UE1 maps the D2D data to the same QCI cellular bearer according to the received Q2 of the D2D bearer corresponding to the D2D data. In addition, the relay UE1 may also map the D2D data received by the D2D bearers of the multiple QCIs to the cellular bearer of one QCI for transmission. If the cellular bearer corresponding to the QCI cannot be found, the relay UE discards the data, or relays the UE1 to the network to initiate a bearer resource allocation request to establish a corresponding cellular bearer according to the method described in Embodiment 2. The request includes the relay UE to establish a bearer. QCI information. After the cellular bearer configuration is completed, the relay UE will receive the D2D data received from the remote UE2 and map it to the newly established cellular bearer and transmit it to the network.

In order to ensure that the PGW of the cellular network can map the data packet sent to the remote UE2 to the bearer corresponding to the same QCI, the relay UE1 receives the data sent from the remote UE2 to the network and maps to the corresponding cellular bearer. Further determining whether the corresponding remote UE2 service flow can be aggregated to the cellular bearer by using a packet filter and a TFT. If not, the relay UE1 initiates a bearer resource modification request to the network to update the corresponding cellular bearer, where the request includes the relay UE desired. The TFT information corresponding to the service flow of the aggregated remote UE to be forwarded. After the cellular bearer update is completed, the PGW can also map the data packet to the cellular bearer corresponding to the QCI after receiving the data packet sent to the remote UE2.

When the relay UE1 receives the data packet from the network, the relay UE1 determines whether it is transmitted to the relay UE1 or the remote UE it serves based on the destination address and/or port number of the IP header. Assuming that the received data packet destination is the remote UE2, the relay UE1 maps the received cellular data to the D2D bearer of the same QCI according to the QCI of the bearer corresponding to the received cellular data. If the D2D bearer corresponding to the QCI cannot be found, the relay UE discards the data, or relays the UE2 to the remote UE2 to initiate D2D bearer configuration/reconfiguration to establish/update the corresponding D2D bearer, and waits for the D2D bearer. After the configuration is completed, the relay UE maps the received cellular data to the newly established or updated D2D bearer for transmission.

Example 7

As shown in FIG. 10, the relay UE1 receives the data sent from the remote UE2 to the network, and the relay UE1 selects the priority of the D2D bearer corresponding to the received D2D data or the priority of the remote UE2 or the remote UE access. The priority corresponding to the D2D communication group/data packet belongs to the D2D data mapped to the same priority cellular bearer for transmission. If the corresponding priority cell cannot be found The bearer UE1 discards the data, or relays the UE1 to the network to initiate a bearer resource allocation request to establish a corresponding cellular bearer according to the method described in the second embodiment. The request includes the priority information that the relay UE1 wishes to establish the bearer. After the cellular bearer configuration is completed, the relay UE1 maps the D2D data received from the remote UE2 to the newly established cellular bearer and transmits it to the network.

In order to ensure that the PGW of the cellular network can map the data packets sent to the remote UE2 to the EPS bearers corresponding to the same priority, the relay UE1 receives the data sent from the remote UE2 to the network and maps to the corresponding priority. After the bearer is carried out, it is further determined whether the corresponding far-end UE2 service flow can be aggregated to the cellular bearer by using a packet filter and a TFT. If not, the relay UE1 initiates a bearer resource modification request to the network to update the corresponding cellular bearer, in the request. The TFT information corresponding to the to-be-forwarded service flow of the remote UE2 that is required to be relayed by the UE1 is included. After the cell bearer update is completed, the PGW can also map the data packet to the corresponding priority cell bearer after receiving the data packet sent to the remote UE2.

When the relay UE1 receives the data packet from the network, the relay UE1 determines whether it is transmitted to the relay UE1 or the remote UE2 of its service according to the destination address and/or the port number of the IP header. Assuming that the received data packet destination is the remote UE2, the relay UE1 according to the priority of the bearer corresponding to the received cellular data or the priority of the remote UE2 or the D2D communication group/packet to which the remote UE2 accesses. The corresponding priority maps the received cellular data to a D2D bearer of the same priority for transmission. If the D2D bearer of the corresponding priority cannot be found, the relaying UE1 discards the data, or relays the UE2 to the remote UE2 to initiate D2D bearer configuration/reconfiguration to establish/update the corresponding D2D bearer, and waits until D2D. After the bearer configuration is completed, the relay UE1 maps the received cellular data to the newly established or updated D2D bearer for transmission.

Example 8

Users A, B, and C respectively hold UE1, UE2, and UE3 having D2D communication and relay functions. UE1 and UE2 are within D2D communication range of each other, UE1 and UE3 are within D2D communication range of each other, and UE2 and UE3 are not within D2D communication range of each other.

It is assumed that the base station configures UE1 to be a UE-to-UE relay and activates the relay function of UE1, and the system is pre-configured with bearer mapping/multiplexing rules. Before the relay UE1 performs the mapping of the D2D bearer and the D2D bearer, the relay UE1 needs to establish the D2D bearer first.

The establishment of the D2D bearer between the relay UE1 and the remote UE3 may be performed when the relay UE1 receives the D2D data sent by the remote UE3, and the RLC receiving entity and the PDCP receiving entity; further, the relay UE3 The D2D bearer may also be established by initiating a bearer setup procedure to the relay UE1 before transmitting the D2D data to the relay UE1.

As shown in FIG. 11, the relay UE1 receives the data from the remote UE2 (refer to step 1101), performs MAC/RLC/PDCP processing on the received D2D data, and submits it to the upper layer, and the upper layer can determine the IP packet header address. Whether the data packet is sent to the relay UE1 or needs to be forwarded to the remote end UE. If it is required to forward to the peer remote UE2, the relay UE1 determines, according to a predefined rule, whether a D2D bearer with the remote UE2 that can carry the data can be found (see step 1102). If there is no corresponding D2D bearer, the relay UE1 establishes a corresponding logical channel, an RLC transmitting entity and a PDCP transmitting entity. Further, the relay UE1 may further send a D2D bearer setup request to the remote UE, where the bearer corresponding transmit TFT, QoS information, and relay related information are included (refer to step 1103). After receiving the information, the peer-to-peer remote UE2 establishes a D2D bearer according to the D2D bearer setup information, and sends D2D bearer setup completion information to the relay UE1 (see step 1104). In addition, relay UE1 may also trigger D2D bearer modification. Both the D2D bearer setup and the D2D modification process are delivered through the D2D connection reconfiguration message and the D2D connection reconfiguration complete message.

If the relay UE1 finds the corresponding D2D bearer according to the mapping rule pre-configured by the system, the relay UE1 transmits the data packet through the corresponding D2D bearer (see steps 1105 to 1106).

Example 9

It is assumed that the UE1 activates the relay function to become the relay UE, and the remote UE2 and the remote UE3 select the forwarding information transmitted by the relay UE1, and the mapping rules are obtained according to the method of the example 1, and the D2D is established according to the method of the example 8. Hosted.

As shown in FIG. 12, the relay UE1 receives the data sent from the remote UE2 to the network, and the relay UE1 maps the D2D data received by the D2D bearer of the Guaranteed Bit Rate (GBR) to the D2D of the guaranteed bit rate. The bearer performs transmission, and the D2D data received by the non-guaranteed bit rate (non-GBR) D2D bearer is mapped to the D2D bearer of the non-guaranteed bit rate for transmission. If the corresponding D2D bearer cannot be found, the relay UE discards the data, or relays the UE2 to the peer remote UE3 to initiate a D2D bearer setup procedure to establish a D2D bearer according to the method described in Embodiment 8.

When the relay UE1 receives the data packet from the remote UE3, the relay UE1 determines whether to send to the relay UE1 or other remote UE according to the destination address and/or the port number of the IP header. Assuming that the received data packet destination is the remote UE2, the relay UE1 maps the D2D data received by the D2D bearer of the guaranteed bit rate to the D2D bearer of the guaranteed bit rate for transmission, and receives the D2D bearer of the non-guaranteed bit rate. The D2D data is mapped to a D2D bearer with a non-guaranteed bit rate for transmission. If the corresponding D2D bearer cannot be found, the relay UE discards the data, or relays the UE2 to the remote UE2 to initiate D2D bearer configuration/reconfiguration to establish/update the corresponding D2D bearer according to the method described in Embodiment 8, and waits for the D2D bearer configuration. After completion, the relay UE maps the received D2D data to a D2D bearer newly established or updated with the remote UE2 for transmission.

Example 10

It is assumed that the UE1 activates the relay function to become the relay UE, and the remote UE2 and the remote UE3 select the forwarding information of the relay UE1, and the mapping rules are obtained according to the method of the first embodiment. The D2D bearer was established in accordance with the method of Example 8.

As shown in FIG. 13, the relay UE1 receives the data sent from the remote UE2 to the network, and the relay UE1 maps the D2D data to the D2D bearer of the same logical channel identifier according to the logical channel identifier of the D2D bearer corresponding to the received D2D data. Transfer. Further, the relay UE1 may also map the received D2D data to any D2D bearer of the same logical channel group identifier according to the received logical channel group identifier corresponding to the received D2D data for transmission. If the corresponding D2D bearer cannot be found, the relay UE discards the data, or relays the UE2 to the remote UE2 to initiate D2D bearer configuration/reconfiguration to establish/update the corresponding D2D bearer according to the method described in Embodiment 8, and waits for the D2D bearer configuration. After completion, the relay UE maps the received D2D data to a D2D bearer newly established or updated with the remote UE2 for transmission.

In summary, by performing the embodiments of the present invention, the UE having the relay capability can map the data packet received by the PC5 interface to the Uu bearer for forwarding, or the Uu port, according to a predetermined rule. The received data packet is mapped to the PC5 interface for forwarding. In this way, the relay bearer control is implemented and the quality of service is guaranteed.

Embodiment 2

Corresponding to the relay bearer control method according to the first embodiment of the present invention, the second embodiment of the present invention further provides a relay bearer control device, including:

The rule obtaining unit 10 is configured to obtain the first rule;

The mapping unit 20 is configured to perform device-to-device D2D bearer mapping with the cellular bearer and/or the D2D bearer and the D2D bearer according to the obtained first rule; where the D2D bearer and the cellular bearer are mapped to the relay UE and a mapping between a bearer between the remote UEs and a bearer between the relay UE and the network side, where the mapping between the D2D bearer and the D2D bearer is a bearer between the relay UE and the remote UE and the relay UE Mapping with bearers between the remote end UEs.

The first rule includes at least one of the following:

Carrying the corresponding service flow template TFT; the quality of service level identifier QCI; bearer Logical channel identifier; bearer logical channel group identifier; bearer priority; remote UE priority; D2D communication group/data packet priority; bearer guaranteed bit rate; data corresponding differential service code point DSCP; default D2D Or cellular bearer.

In an embodiment, the device further includes a bearer establishing unit 30, and the connection mapping unit 20,

When the first rule is to carry the corresponding TFT, the mapping unit 20 is configured to

And mapping the received D2D data to the cellular bearer according to the uplink service flow template UL TFT corresponding to the cellular bearer; or determining, according to the packet filter corresponding to the UL TFT, the cellular bearer that matches the received D2D data, And mapping the received D2D data to the matched cellular bearer when a matching cellular bearer is found; or

The mapping unit 20 is configured to determine, according to a packet filter corresponding to the downlink service flow template DL TFT of the D2D bearer of the remote UE, a D2D bearer that matches the cellular data, where the packet filter corresponding to the D2D bearer DL TFT is Obtaining the source and destination IP and the port number corresponding to the packet filter corresponding to the uplink TFT of the cellular bearer; or determining, according to the packet filter corresponding to the TFT of the D2D bearer of the remote UE of the peer end, matching the D2D data. D2D bearer;

Mapping the received D2D or cellular data to the match when a matching D2D bearer is found Equipped with D2D bearer.

The mapping unit 20 is configured to discard the received data when a matching D2D bearer or cellular bearer cannot be found; or

In an embodiment, when the first rule is a bearer QCI, the mapping unit 20 is configured to:

In an embodiment, when the first rule is a logical channel identifier of a bearer, the mapping unit 20 is configured to:

In an embodiment, when the first rule is a logical channel group identifier of a bearer, the mapping unit 20 is configured to:

In an embodiment, when the first rule is a priority of a bearer, the mapping unit 20 is configured to:

In an embodiment, when the first rule is the priority of the remote UE, the mapping unit 20 is configured to

In an embodiment, when the first rule is a priority of a D2D communication group/data packet, the mapping unit 20 is configured to receive according to a priority of a D2D communication group/data packet corresponding to the received D2D data. The incoming D2D data is mapped to a corresponding priority cellular bearer.

In an embodiment, when the first rule is that the bearer guarantees a bit rate, the mapping unit 20 is configured to:

In an embodiment, when the first rule is a DSCP corresponding to the data, the mapping unit 20 is configured to:

In an embodiment, when the first rule is a default D2D or a cellular bearer, the mapping unit 20 is configured to:

Map the received cellular data to the default D2D bearer.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the computer is readable and stored The instructions in the reservoir produce an article of manufacture comprising an instruction device that implements the functions specified in one or more blocks of the flow or in a flow or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Industrial applicability

By implementing the technical solution of the embodiment of the present invention, the UE with the relay capability can map the data packet received by the PC5 interface to the Uu bearer for forwarding according to a predetermined rule, or receive the Uu port. The data packet is mapped to the PC5 interface for forwarding. In this way, the relay bearer control is implemented and the quality of service is guaranteed.

Claims

A relay bearer control method, the method comprising:

Obtain the first rule;

Performing mapping of the device-to-device D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the obtained first rule; wherein the mapping between the D2D bearer and the cellular bearer is between the relay UE and the remote UE Mapping the bearer between the relay UE and the network side, the mapping between the D2D bearer and the D2D bearer is a bearer between the relay UE and the remote UE, and the relay UE and the remote end UE The mapping between the bearers.
The relay bearer control method according to claim 1, wherein the first rule comprises at least one of the following:

Carrying the corresponding service flow template TFT; the quality of service level identifier QCI; the logical channel identifier of the bearer; the logical channel group identifier of the bearer; the priority of the bearer; the priority of the remote UE; the priority of the D2D communication group/packet Whether the bearer guarantees the bit rate; the data corresponding to the differential service code point DSCP; the default D2D or cellular bearer.
The relay bearer control method according to claim 1 or 2, wherein before the mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer is performed according to the obtained first rule, the method further includes:

When the remote UE accesses, or when the remote UE initiates the service request/bearer setup request/bearer modification request, or receives the D2D data sent by the remote UE, the D2D bearer configuration/reconfiguration is initiated to the remote end UE. , establishing a corresponding D2D bearer; and/or

When the relay function is activated, or when the remote UE accesses, or when the remote UE initiates a service request/bearer setup request/bearer modification request, or receives D2D data sent by the remote UE, initiates a service request to the network/ The resource allocation request/bearer resource modification request is carried, and the corresponding cellular bearer is established/updated.
The relay bearer control method according to claim 2, wherein the first rule is And the step of performing mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the first rule, including:

And mapping the received D2D data to the cellular bearer according to the uplink service flow template UL TFT corresponding to the cellular bearer; or determining, according to the packet filter corresponding to the UL TFT, the cellular bearer that matches the received D2D data, And mapping the received D2D data to the matched cellular bearer when a matching cellular bearer is found; or

The received D2D data or cellular data is mapped to the D2D bearer according to the TFT corresponding to the D2D bearer.
The relay bearer control method according to claim 4, wherein the mapping of the received D2D data or cellular data to the D2D bearer according to the TFT corresponding to the D2D bearer comprises:

Determining, by the packet filter corresponding to the downlink service flow template DL TFT of the D2D bearer of the remote UE, the D2D bearer that matches the cellular data, where the packet filter corresponding to the D2D bearer DL TFT is corresponding to the cellular bearer uplink TFT The source and destination IPs corresponding to the packet filter and the port number are obtained in reverse;

Or determining, according to the packet filter corresponding to the TFT of the D2D bearer of the remote end UE, the D2D bearer that matches the D2D data;

Upon finding a matching D2D bearer, the received D2D or cellular data is mapped to the matched D2D bearer.
The relay bearer control method according to claim 5, wherein when the matching D2D bearer or the cellular bearer cannot be found, the method further includes:

Discard the received data; or

Initiating a D2D bearer configuration/reconfiguration to the remote UE or the remote end UE, and establishing a corresponding D2D bearer; or initiating a service request/bearer resource allocation request/bearer resource modification request to the network to establish/update a corresponding cellular bearer; After the D2D bearer or cellular bearer configuration is completed, the received cellular data or D2D data is mapped to the configured D2D or cellular bearer.
The relay bearer control method according to claim 2, wherein, when the first rule is a bearer QCI, the step of performing mapping of a D2D bearer and a cellular bearer and/or a D2D bearer and a D2D bearer according to the first rule, include:

Mapping the D2D data to a cellular bearer or a D2D bearer of the same QCI according to the QCI of the D2D bearer corresponding to the received D2D data; or

Mapping the received cellular data to a D2D bearer of the same QCI according to the QCI of the bearer corresponding to the received cellular data; or

Mapping D2D data received by multiple QCI D2D bearers to a QCI cellular bearer or D2D bearer; or

The cellular data received by the plurality of QCI cellular bearers is mapped to a Q2 D2D bearer.
The relay bearer control method according to claim 2, wherein, when the first rule is a logical channel identifier of a bearer, the performing, according to the first rule, performing mapping of a D2D bearer and a cellular bearer and/or a D2D bearer and a D2D bearer Steps, including:

Mapping the D2D data to a cellular bearer or a D2D bearer of the same logical channel identifier according to the logical channel identifier of the D2D bearer corresponding to the received D2D data; or

The received cellular data is mapped to the D2D bearer of the same logical channel identifier according to the logical channel identifier of the bearer corresponding to the received cellular data.
The relay bearer control method according to claim 2, wherein, when the first rule is a logical channel group identifier of a bearer, the mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the first rule is performed. Steps include:

And mapping the received D2D data to any cellular bearer or D2D bearer of the same logical channel group identifier according to the logical channel group identifier of the D2D bearer corresponding to the received D2D data; or

The received cellular data is mapped to any D2D bearer of the same logical channel group identifier according to the logical channel group identifier of the cellular bearer corresponding to the received cellular data.
The relay bearer control method according to claim 2, wherein, when the first rule is a priority of a bearer, the step of performing mapping of a D2D bearer and a cellular bearer and/or a D2D bearer and a D2D bearer according to the first rule ,include:

And mapping the received D2D data to a cell bearer or a D2D bearer of the same priority according to a priority of the D2D bearer corresponding to the received D2D data; or

The received cellular data is mapped to D2D bearers of the same priority according to the priority of the cellular bearer corresponding to the received cellular data.
The relay bearer control method according to claim 2, wherein, when the first rule is the priority of the remote UE, the mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the first rule is performed. Steps include:

The received D2D data is mapped to a corresponding priority cellular bearer according to the priority of the D2D UE corresponding to the received D2D data.
The relay bearer control method according to claim 2, wherein when the first rule is a priority of a D2D communication group/data packet, the performing the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D according to the first rule The steps of the mapped mapping include:

The received D2D data is mapped to a corresponding priority cellular bearer according to the priority of the D2D communication group/data packet corresponding to the received D2D data.
The relay bearer control method according to claim 2, wherein, when the first rule is whether the bearer guarantees a bit rate, the mapping of the D2D bearer and the cellular bearer and/or the D2D bearer and the D2D bearer according to the first rule is performed. Steps, including:

Mapping the received D2D data of the bit rate D2D bearer to the guaranteed bit rate of the cellular bearer or D2D bearer; or

Mapping the received cellular data of the guaranteed bit rate cellular bearer to a guaranteed bit rate D2D bearer; or

Mapping D2D data received by a non-guaranteed bit rate D2D bearer to a non-guaranteed bit rate cellular bearer or D2D bearer; or

The cellular data received by the non-guaranteed bit rate cellular bearer is mapped to the D2D bearer of the non-guaranteed bit rate.
The relay bearer control method according to claim 2, wherein, when the first rule is a DSCP corresponding to data, the step of performing mapping of a D2D bearer and a cellular bearer and/or a D2D bearer and a D2D bearer according to the first rule ,include:

And performing DSCP identification on the received D2D data according to the QCI of the D2D bearer corresponding to the received D2D data, and then mapping the DSCP information according to the D2D data to the cellular bearer or the D2D bearer corresponding to the QCI; or

The received cellular data is DSCP-identified according to the QCI of the bearer corresponding to the received cellular data, and then mapped to the D2D bearer corresponding to the QCI according to the DSCP information of the cellular data.
The relay bearer control method according to claim 2, wherein when the first rule is a default D2D or a cellular bearer, the performing the mapping of the D2D bearer to the cellular bearer and/or the D2D bearer and the D2D bearer according to the first rule Steps, including:

Mapping the received D2D data to a default cellular bearer or a default D2D bearer; or

Map the received cellular data to the default D2D bearer.
A relay bearer control device, the device comprising:

a rule obtaining unit configured to obtain a first rule;

a mapping unit, configured to perform device-to-device D2D bearer mapping with a cellular bearer and/or a D2D bearer and a D2D bearer according to the obtained first rule; where the mapping between the D2D bearer and the cellular bearer is a relay UE and a far a mapping between a bearer between the UEs and a bearer between the UE and the network side, where the mapping between the D2D bearer and the D2D bearer is a bearer between the relay UE and the remote UE and the relay UE and Mapping of bearers between remote end UEs.
The relay bearer control device according to claim 16, wherein the first rule comprises at least one of the following:

Carrying the corresponding service flow template TFT; the quality of service level identifier QCI; bearer Logical channel identifier; bearer logical channel group identifier; bearer priority; remote UE priority; D2D communication group/data packet priority; bearer guarantee bit rate; data corresponding differential service code point DSCP; default D2D or cellular bearer.
The relay bearer control device according to claim 16 or 17, wherein the device further comprises a bearer establishing unit,

When the remote UE accesses, or when the remote UE initiates the service request/bearer setup request/bearer modification request, or receives the D2D data sent by the remote UE, the D2D bearer configuration is initiated to the remote end UE/ Reconfigure, establish the corresponding D2D bearer; and / or

When the relay function of the relay UE is activated, or when the remote UE accesses, or when the remote UE initiates a service request/bearer setup request/bearer modification request, or receives D2D data sent by the remote UE, Initiating a service request/bearer resource allocation request/bearer resource modification request to the network, establishing/updating the corresponding cellular bearer.
The relay bearer control device according to claim 17, wherein when the first rule is to carry a corresponding TFT, the mapping unit is configured to

And mapping the received D2D data to the cellular bearer according to the uplink service flow template UL TFT corresponding to the cellular bearer; or determining, according to the packet filter corresponding to the UL TFT, the cellular bearer that matches the received D2D data, And mapping the received D2D data to the matched cellular bearer when a matching cellular bearer is found; or

The received D2D data or cellular data is mapped to the D2D bearer according to the TFT corresponding to the D2D bearer.
The relay bearer control apparatus according to claim 19, wherein the mapping unit is configured to determine, according to a packet filter corresponding to the downlink service flow template DL TFT of the D2D bearer of the remote UE, a D2D bearer matched with the cellular data. The packet filter corresponding to the DL TFT of the D2D bearer is obtained by inverting the source and destination IPs and the port number corresponding to the packet filter corresponding to the uplink TFT of the cell; or the TFT carried by the D2D of the remote UE of the peer end Corresponding packet filter determines a D2D bearer that matches the D2D data;

Upon finding a matching D2D bearer, the received D2D or cellular data is mapped to the matched D2D bearer.
The relay bearer control apparatus according to claim 20, wherein said mapping unit is configured to discard the received data when a matching D2D bearer or a cellular bearer cannot be found; or

Initiating a D2D bearer configuration/reconfiguration to the remote UE or the remote end UE, and establishing a corresponding D2D bearer; or initiating a service request/bearer resource allocation request/bearer resource modification request to the network to establish/update a corresponding cellular bearer; After the D2D bearer or cellular bearer configuration is completed, the received cellular data or D2D data is mapped to the configured D2D or cellular bearer.
The relay bearer control apparatus according to claim 17, wherein, when the first rule is a QCI of a bearer, the mapping unit is configured to

Mapping the D2D data to a cellular bearer or a D2D bearer of the same QCI according to the QCI of the D2D bearer corresponding to the received D2D data; or

Mapping the received cellular data to a D2D bearer of the same QCI according to the QCI of the bearer corresponding to the received cellular data; or

Mapping D2D data received by multiple QCI D2D bearers to a QCI cellular bearer or D2D bearer; or

The cellular data received by the plurality of QCI cellular bearers is mapped to a Q2 D2D bearer.
The relay bearer control apparatus according to claim 17, wherein, when the first rule is a logical channel identifier of a bearer, the mapping unit is configured to

Mapping the D2D data to a cellular bearer or a D2D bearer of the same logical channel identifier according to the logical channel identifier of the D2D bearer corresponding to the received D2D data; or

The received cellular data is mapped to the D2D bearer of the same logical channel identifier according to the logical channel identifier of the bearer corresponding to the received cellular data.
The relay bearer control device according to claim 17, wherein said first rule When the logical channel group is identified, the mapping unit is configured to

And mapping the received D2D data to any cellular bearer or D2D bearer of the same logical channel group identifier according to the logical channel group identifier of the D2D bearer corresponding to the received D2D data; or

The received cellular data is mapped to any D2D bearer of the same logical channel group identifier according to the logical channel group identifier of the cellular bearer corresponding to the received cellular data.
The relay bearer control apparatus according to claim 17, wherein, when the first rule is a priority of a bearer, the mapping unit is configured to

And mapping the received D2D data to a cell bearer or a D2D bearer of the same priority according to a priority of the D2D bearer corresponding to the received D2D data; or

The received cellular data is mapped to D2D bearers of the same priority according to the priority of the cellular bearer corresponding to the received cellular data.
The relay bearer control apparatus according to claim 17, wherein, when the first rule is a priority of a remote UE, the mapping unit is configured to

The received D2D data is mapped to a corresponding priority cellular bearer for transmission according to the priority of the D2D UE corresponding to the received D2D data.
The relay bearer control apparatus according to claim 17, wherein, when the first rule is a priority of a D2D communication group/data packet, the mapping unit is configured to correspond to a D2D communication group corresponding to the received D2D data/ The priority of the data packet maps the received D2D data to a corresponding priority cellular bearer.
The relay bearer control apparatus according to claim 17, wherein, when the first rule is that the bearer guarantees a bit rate, the mapping unit is configured to

Mapping the received D2D data of the bit rate D2D bearer to a guaranteed bit rate cellular bearer or D2D bearer for transmission; or

Mapping the received cellular data of the guaranteed bit rate cellular bearer to a guaranteed bit rate D2D bearer; or

Mapping D2D data received by a non-guaranteed bit rate D2D bearer to a non-guaranteed bit rate cellular bearer or D2D bearer; or

The cellular data received by the non-guaranteed bit rate cellular bearer is mapped to the D2D bearer of the non-guaranteed bit rate.
The relay bearer control device according to claim 17, wherein, when the first rule is a DSCP corresponding to data, the mapping unit is configured to

And performing DSCP identification on the received D2D data according to the QCI of the D2D bearer corresponding to the received D2D data, and then mapping the DSCP information according to the D2D data to the cellular bearer or the D2D bearer corresponding to the QCI; or

The received cellular data is DSCP-identified according to the QCI of the bearer corresponding to the received cellular data, and then mapped to the D2D bearer corresponding to the QCI according to the DSCP information of the cellular data.
The relay bearer control apparatus according to claim 17, wherein when the first rule is a default D2D or a cellular bearer, the mapping unit is configured to

Mapping the received D2D data to a default cellular bearer or a default D2D bearer; or

Map the received cellular data to the default D2D bearer.
A computer storage medium comprising a set of computer executable instructions for performing the relay bearer control method of any of claims 1-15.