WO2014205838A1

WO2014205838A1 - Data forwarding method, relay node equipment and network system

Info

Publication number: WO2014205838A1
Application number: PCT/CN2013/078500
Authority: WO
Inventors: 曹振臻; 熊新; 李明超
Original assignee: 华为技术有限公司
Priority date: 2013-06-29
Filing date: 2013-06-29
Publication date: 2014-12-31
Also published as: CN104471874B; CN104471874A

Abstract

The embodiment of the present invention provides a data forwarding method, relay node equipment and network system. The data forwarding method provided in the present invention comprises: a piece of user equipment in the relay node equipment receiving data transmitted through a downlink channel by a first network device; the user equipment forwarding the data to another user equipment in the relay node equipment according to a destination address of the data, enabling the another user equipment to transmit the data to a second network device through an uplink channel; and the relay node equipment comprising at least two pieces of user equipment, and data being forwarded between any two pieces of user equipment. The embodiment of the present invention reduces the influence of interferences in the relay node equipment upon a backhaul link, and improves the performances of the wireless backhaul link.

Description

Data forwarding method, relay node device and network system

Technical field

The embodiments of the present invention relate to communication technologies, and in particular, to a data forwarding method, a relay node device, and a network system. Background technique

With the development of mobile communication technology, large-scale deployment of a new generation of mobile communication networks, high-speed services are bringing people a colorful application experience. Moreover, the large-scale growth of smart mobile terminals has led to an increasing demand for mobile data traffic. In order to cope with the rapid growth of mobile data service traffic, in places with more mobile users, for example, shopping malls, low-power nodes (Low Power Nodes, LPN for short) can be deployed in cells with small coverage areas, such as wireless. A small station of the Relay Node (RN). These LPNs are connected to the core network via a wireless link to form a wireless backhaul (Backhaul). These wireless Backhaul links provide users with higher speed data services.

The Type-1 Relay in the wireless backhaul system of the prior art is bound by a User Equipment (UE) module and an Evolved Node B (eNB) module. The UE module is connected to the eNB that can provide the Backhaul service, and the eNB module is connected to the UE module of the Type-1 Relay of another to transmit Backhaul data, and the eNB module can also connect with the UE that needs to access the network to transmit the access link data.

Since the Type-1 Relay is an Inband Relay, the g卩UE module and the eNB module use the same frequency resource when transmitting data. FIG. 1 is a schematic diagram of data transmission in the prior art. As shown in FIG. 1 , at the same time, the UE module included in the Type-1 Relay transmits Backhaul data through an uplink (UL), and the eNB module receives Backhaul data through an uplink, or the UE module passes the downlink. The downlink (DL) receives Backhaul data and the eNB module sends Backhaul data through the downlink. Both of them have serious intra-device interference, which makes the performance of the wireless Backhaul link poor. Summary of the invention

The embodiments of the present invention provide a data forwarding method, a relay node device, and a network system, to solve the problem that the performance of the wireless Backhaul link is poor due to intra-device interference of the relay node when transmitting Backhaul data in the prior art.

In a first aspect, an embodiment of the present invention provides a data forwarding method, including:

One user equipment in the relay node device receives data sent by the first network device through the downlink channel;

Transmitting, by the user equipment, the data to another user equipment of the relay node device according to the destination address of the data, so that the another user equipment sends the information to the second network device by using an uplink channel. Data: The relay node device includes at least two user equipments, and data forwarding can be performed between any two of the user equipments.

In a first possible implementation of the first aspect, the data comprises data of different protocol layers.

According to a first aspect or the first possible implementation of the first aspect, in a second possible implementation, the data comprises user plane data and/or control plane data.

In a third possible implementation manner of the first aspect, the one user equipment can perform data transmission with different network equipments in different time-frequency resources.

In a second aspect, the embodiment of the present invention further provides a data forwarding method, including:

And transmitting, by the user equipment, the data to the second network device by using an uplink channel according to the destination address of the data; and the one user equipment can perform data transmission with different network devices in different time-frequency resources.

In a first possible implementation of the second aspect, the data comprises data of different protocol layers.

According to a second aspect or the first possible implementation of the second aspect, in a first possible implementation of the second aspect, the data comprises user plane data and/or control plane data.

In a third aspect, an embodiment of the present invention provides a relay node device, which includes at least two user equipments: a first user equipment and a second user equipment, and data forwarding between any two of the user equipments ; The first user equipment is configured to receive data sent by the first network device by using a downlink channel, and forward the data to the second user equipment according to the destination address of the data, so that the second user equipment Transmitting, by the uplink channel, data forwarded by the first user equipment to the second network device.

In a first possible implementation manner of the third aspect, the data that is forwarded by the first user equipment includes data of different protocol layers.

According to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner, the data forwarded by the first user equipment includes user plane data and/or control plane data.

In a third possible implementation manner of the third aspect, the first user equipment can perform data transmission with different network equipments in different time-frequency resources.

In a fourth aspect, the embodiment of the present invention further provides a relay node device, including:

a user equipment: the first user equipment, where the first user equipment can perform data transmission with different time-frequency resources and different network devices;

The first user equipment is configured to receive data sent by the first network device by using a downlink channel, and configured to send the data to the second network device by using an uplink channel according to the destination address of the data.

In a first possible implementation manner of the fourth aspect, the data that is forwarded by the first user equipment includes data of different protocol layers.

According to a fourth aspect, or a first possible implementation manner of the fourth invention, in a second possible implementation manner, the data forwarded by the first user equipment includes user plane data and/or control plane data.

The fifth aspect, the embodiment of the present invention further provides a relay node device, including at least two user equipments: a first user equipment and a second user equipment, and data forwarding between any two of the user equipments;

The first user equipment includes:

a first receiver, configured to receive data sent by the first network device by using a downlink channel, where the first transmitter is configured to forward the data to the second user equipment according to the destination address of the data;

The second user equipment includes:

a second receiver, configured to receive the data forwarded by the first transmitter; And transmitting, by the second transmitter, the data received by the second receiver to the second network device by using an uplink channel.

In a first possible implementation manner of the fifth aspect, the data forwarded by the first transmitter includes data of different protocol layers.

According to a fifth aspect or a first possible implementation of the fifth aspect, in a second possible implementation, the data forwarded by the first transmitter comprises user plane data and/or control plane data.

In a third possible implementation manner of the fifth aspect, the first receiver is capable of receiving data sent by different network devices at different time-frequency resources;

The first transmitter is capable of transmitting data to different network devices at different time-frequency resources. In a sixth aspect, the embodiment of the present invention further provides a relay node device, including: a first user equipment;

The first user equipment includes:

a receiver, configured to receive, by using a downlink channel, data sent by the first network device;

a transmitter, configured to send, by using an uplink channel, the data received by the receiver to the second network device according to the destination address of the data;

The receiver can receive data sent by different network devices at different time-frequency resources; the transmitter can send data to different network devices at different time-frequency resources.

In a first possible implementation manner of the sixth aspect, the data sent by the transmitter includes data of different protocol layers.

According to a sixth aspect or a first possible implementation of the sixth aspect, in a second possible implementation, the data transmitted by the transmitter comprises user plane data and/or control plane data.

According to a seventh aspect, the embodiment of the present invention further provides a network system, including the relay node device provided by any one of the third aspect or the fifth aspect, and the first network device and the second network device; A network device is connected to the second network device by each of the relay node devices.

The seventh aspect, the embodiment of the present invention further provides a network system, including the relay node device provided by any one of the fourth aspect or the sixth aspect, and the first network device and the second network device, where A network device is connected to the second network device by using each of the relay node devices to connect the data forwarding method, the relay node device, and the network system according to the embodiment of the present invention. The relay node device receives the Backhaul through the downlink channel, and sends the uplink through the uplink channel. Backhaul data, due to the uplink Channel transmission and downlink channel transmission use different frequency resources, thus solving the problem of intra-device interference of the relay node equipment, reducing the impact of the intra-device interference on the Backhaul link, and improving the performance of the wireless Backhaul link. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below, and obviously, in the following description The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.

1 is a schematic diagram of data transmission in the prior art;

2 is a flowchart of a data forwarding method according to an embodiment of the present invention;

3 is a schematic structural diagram of a system for forwarding data between multiple eNBs and eNB2 through multiple Type A Relays according to another embodiment of the present invention;

4 is a schematic structural diagram of a system for forwarding data according to another embodiment of the present invention; FIG. 5 is a schematic flowchart of a data forwarding method according to still another embodiment of the present invention; FIG. 6 is a schematic diagram of another embodiment of the present invention. Schematic diagram of the user plane data structure of the GTP-U layer protocol stack forwarded in the data transmission method;

7 is a flowchart of forwarding user plane data of a GTP-U layer protocol stack in a data transmission method according to another embodiment of the present invention;

8 is a schematic structural diagram of user plane data forwarding an IP layer protocol stack in a data transmission method according to another embodiment of the present invention;

FIG. 9 is a flowchart of forwarding user plane data of an IP layer protocol stack in a data transmission method according to another embodiment of the present invention; FIG.

10 is a schematic diagram of a user plane data structure for forwarding a PDCP layer protocol stack in a data transmission method according to another embodiment of the present invention;

FIG. 11 is a flowchart of forwarding user plane data of a PDCP layer protocol stack in a data transmission method according to another embodiment of the present invention; FIG.

12 is a schematic structural diagram of data of a control plane for forwarding an S1AP layer protocol stack in a data transmission method according to another embodiment of the present invention;

FIG. 13 is a schematic diagram of forwarding a S1AP layer protocol in a data transmission method according to another embodiment of the present invention; Flow chart of the control plane data of the stack;

14 is a schematic structural diagram of data of a control plane for forwarding an IP layer protocol stack in a data transmission method according to another embodiment of the present invention;

FIG. 15 is a schematic structural diagram of data of a control plane for forwarding a PDCP layer protocol stack in a data transmission method according to another embodiment of the present invention; FIG.

16 is a flowchart of a data forwarding method according to still another embodiment of the present invention;

FIG. 17 is a schematic structural diagram of a data forwarding method according to still another embodiment of the present invention; FIG. 18 is a schematic flowchart of a data forwarding method according to still another embodiment of the present invention; A flow chart of forwarding user plane data of the GTP-U layer protocol stack in the data transmission method;

20 is a flowchart of forwarding user plane data of an IP layer protocol stack in a data transmission method according to another embodiment of the present invention;

FIG. 21 is a flowchart of forwarding user plane data of a PDCP layer protocol stack in a data transmission method according to another embodiment of the present invention; FIG.

FIG. 22 is a flowchart of forwarding control plane data of an S1AP layer protocol stack in a data transmission method according to another embodiment of the present invention; FIG.

FIG. 23 is a schematic structural diagram of a relay node device according to still another embodiment of the present invention; FIG. 24 is a schematic structural diagram of a relay node device according to still another embodiment of the present invention; FIG. 26 is a schematic structural diagram of a relay node device according to still another embodiment of the present invention; FIG. 27 is a schematic structural diagram of a network system according to still another embodiment of the present invention;

FIG. 28 is a schematic structural diagram of a network system according to still another embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 2 is a flowchart of a data forwarding method according to an embodiment of the present invention. The method of this embodiment is applicable to the case where Backhaul data transmission is performed by a relay node device between network devices including a base station module. The method is performed by a relay node device. The method of this embodiment includes the following steps:

("fine il箪91 preparation" Step 200: A user equipment in the relay node device receives data sent by the first network device through the downlink channel.

Specifically, the network device is a network node that can communicate with the UE, and may be, for example, an eNB, a primary evolved base station (Donor eNB, DeNB for short), a Type-1 Relay, a picocell base station (Picocell NB), or the like. The network device transmits or receives the data through an internal base station module. The data is Backhaul data, for example, it can be S1 data, X2 data or other data exchanged between network nodes. The S1 data is divided into control plane data and user plane data. The control plane data is data exchanged between a base station and a Mobility Management Entity (MME). The user plane data is a base station and a serving gateway (Serving Gateway, referred to as SGW)). The X2 data is the interaction data between the base stations. The network device may be referred to as an eNB, and the first network device and the second network device are respectively referred to as eNB1 and eNB2. The downlink channel may be, for example, a Physical Downlink Shared Channel (PDSCH).

Further, when the first network device needs to send Backhaul data to the target network device, one of the relay node devices receives data sent by the first network device through the downlink channel.

Prior to step 200, the first network device establishes a radio resource control connection with one of the relay node devices.

Specifically, the radio resource control (Radio Resource Control, RRC for short) connection includes multiple radio bearer (RB) connections.

Step 201: The one user equipment forwards the data to another user equipment in the relay node device according to the destination address of the data, so that the another user equipment sends the second user equipment to the second network device through the uplink channel. Sending the data; the relay node device includes at least two user equipments, and data forwarding can be performed between any two user equipments.

Specifically, the relay node device includes at least two UEs, and data forwarding can be performed between any two UEs. For convenience of description, such a relay node device may be referred to as Type AR _e lay. The first user equipment is a UE that establishes a radio resource control connection with the first network device, that is, a UE that is connected to the source network device, which is called UE1; and the other user equipment is a UE that is connected to the second network device, That is, the UE that establishes a radio resource control connection with the target network device is called UE2.

The UE1 determines, according to the received destination address of the data, the network device that receives the data, and forwards the data to the user equipment that establishes a radio resource control connection with the network device that receives the data, that is, the UE2 that is connected to the eNB2. When receiving the data, UE2 stores the data and waits for the scheduling of eNB2.

Further, the another user equipment sends the data to the second network device by using an uplink channel. Previously, an RRC connection with the second network device needs to be established.

The one user equipment receives data through the downlink channel and the other user equipment sends data through the uplink channel, where the downlink channel and the uplink channel have different time-frequency resources, so one user equipment and the other user equipment use different time-frequency resources to transmit data. Therefore, there is no internal interference of the relay node device, and the performance of the Backhaul link is improved.

In the data forwarding method provided by the embodiment, a user equipment of the relay node device receives the Backhaul data sent by the first network device by using the uplink channel, and the second user equipment sends the data to the second network device by using the downlink channel, and the uplink channel is used. Transmission and downlink channel transmission use different time-frequency resources, thus solving the problem of intra-device interference of the relay node device, reducing the impact of the intra-device interference on the Backhaul link, and improving the performance of the wireless Backhaul link.

In the above solution, the data forwarded by the first user equipment includes data of different protocol layers.

The data includes user plane data and/or control plane data. The data may be a Protocol Data Unit (PDU) or a Service Data Unit (SDU) of different access protocol layers of a Long Term Evolution (LTE) system, or may be a network. An Internet Protocol (IP) layer or a packet above the IP layer, such as the GPRS Tunneling Protocol for the User Plane (GTP-U) and the SI interface application protocol of the control plane ( The SI Application Protocol (S1AP) or the X2 Application Protocol (X2AP) of the control plane. The LTE access layer may be, for example, a Radio Resource Control (RRC) protocol layer, a Packet Data Convergence Protocol layer, or a Radio Link Control (RLC) protocol layer. Medium access control (MAC) protocol layer.

Further, the one user equipment can perform data transmission with different network equipments in different time-frequency resources.

Specifically, data transmission is performed on different time-frequency resources and different network devices, including: simultaneously transmitting data with different network devices on different frequency resources, and/or at different times on the same frequency resource. Data transmission with different network devices.

The user equipment can perform data transmission with different network devices in different time-frequency resources, for example, by using different base station interface units included in the user equipment and simultaneously designing different network interfaces. Prepare for data transmission. The time-frequency resources used by different base station interface units to transmit data to different network devices are different.

Each user equipment included in the relay node device can perform data transmission with two or more network devices, and the time-frequency resources used for transmitting data by different network devices are different, so there is no internal device of the relay node device. Interference, improve the performance of the Backhaul link.

On the basis of the foregoing embodiments, the first network device and the second network device may perform data forwarding by using multiple relay node devices, that is, eNB1 and eNB2 perform data forwarding through multiple Type A Relays. FIG. 3 is a schematic structural diagram of a system for forwarding data between multiple eNBs and eNB2 through multiple Type A Relays according to another embodiment of the present invention.

In the case of the system architecture shown in FIG. 3, the data transmission method further includes the following two implementation manners: Implementation manner 1: On a fixed time-frequency resource, the network device performs scheduling by selecting a relay node device with the best channel quality. , used for forwarding data.

Specifically, the Type A Relay may be selected by the eNB1 to send the same signal to multiple Type A Relays on a fixed time-frequency resource, and the strength of the feedback signal of different Type A Relays is detected, and the Type A corresponding to the maximum signal strength is selected. Relay, the Type A Relay with the best channel quality, and sends a scheduling control signal for forwarding data to eNB2.

The Type A Relay may also be used by the eNB 1 to send any signal to multiple Type A Relays on a fixed time-frequency resource to detect the signal-to-noise ratio of the feedback signals of different Type A Relays, and select the type corresponding to the maximum signal-to-noise ratio. A Relay, the Type A Relay with the best channel quality, sends a scheduling control signal for forwarding data to eNB2.

The Type A Relay may also be selected by the eNB1 on the fixed time-frequency resource by detecting the received same signal sent by multiple Type A Relays through the pre-assigned transmission channel, and selecting the signal with the highest signal strength. Type A Relay, which is the Type A Relay with the best channel quality, sends a scheduling control signal for forwarding data to eNB2.

The Type A Relay may also be selected by the eNB2 to select the Type A Relay with the best channel quality on a fixed time-frequency resource, and send a scheduling control signal for transmitting data to the eNB1.

Implementation 2: On a fixed time-frequency resource, the network device performs joint scheduling of multiple relay node devices for data forwarding.

Specifically, multiple Type A Relays send and receive the same data on the same time-frequency resource. It is said that eNB1 forwards the same Backhaul data to eNB2 through multiple Type A Relays, and eNB2 receives that Backhaul data is less affected by the fading or interference of a Type A Relay forwarding channel, thereby improving the reliability of data transmission, thereby ensuring The reliability of the wireless Backhaul link.

The data forwarding method in this embodiment is based on the foregoing embodiment, and proposes a data forwarding method when two network devices include multiple relay node devices, and the channel is selected by the network device on the same time-frequency resource. The best quality relay node equipment performs scheduling or joint scheduling of multiple relay node devices at the same time to improve the reliability of data transmission and improve the performance of the wireless Backhaul link.

A further embodiment of the present invention is based on the foregoing embodiment, and specifically includes two UEs in the Type A Relay as an example for detailed description. FIG. 4 is a schematic diagram of a system architecture of a data forwarding method according to still another embodiment of the present invention. FIG. 5 is a schematic flow chart of a data forwarding method according to still another embodiment of the present invention.

As shown in FIG. 4 and FIG. 5, the steps of the data forwarding method proposed by another embodiment of the present invention are as follows:

Step 500: UE1 and UE2 in Type A Relay establish a wireless resource control connection with eNB1 and eNB2, respectively.

Specifically, the Radio Resource Control (RRC) connection includes multiple RB connections, and different RB connections correspond to different RB identifiers.

Step 501: The UE1 receives Backhaul data sent by the eNB1 through a downlink channel. Specifically, the UE1 receives the Backhaul data sent by the eNB1 in the downlink channel, for example, the PDSCH, through the wireless connection with the eNB1 established in step 400.

Step 502: The UE1 forwards the Backhaul data to the UE2 according to the destination address of the data, and stores the Backhaul data in the UE2, and waits for the scheduling of the eNB2.

Further, UE1 forwards the Backhaul data to UE2, which may be a PDU or SDU that is forwarded at different protocol layers, including user plane data and control plane data.

The following is an example of UE1 forwarding user plane data to UE2 at different protocol layers as an example:

FIG. 6 is a schematic structural diagram of user plane data of a GTP-U layer protocol stack forwarded in a data transmission method according to another embodiment of the present invention. FIG. 7 is a flowchart of forwarding user plane data of a GTP-U layer protocol stack in a data transmission method according to another embodiment of the present invention. As shown in Figure 6 and Figure 7, UE1 forwards the GTP-U layer user plane data to UE2.

Step 700: When receiving the Backhaul data, the UE1 parses the Backhaul data to obtain a destination address, and forwards the Backhaul data to the UE2 at the GTP-U layer.

Specifically, the destination address is an IP address of the target eNB or an identifier of a cell where the target eNB is located. Step 701: UE2 parses the received GTP-U layer Backhaul data to obtain

The GTP-U layer backhaul carries the information carried by the packet header, and stores the Backhaul data in UE2, waiting for the scheduling of eNB2.

Specifically, the GTP-U layer Backhaul packet header carries information such as a Tunnel Endpoint Identifier (TEID) or a Quality of Service (QoS) information, and the TEID may be Type information of the Backhaul data, and the QOS may Is the priority information of Backhaul data. The scheduling of the eNB2 is similar to the scheduling of the eNB2 in the foregoing Embodiment 2, and details are not described herein again.

Step 702: After receiving the scheduling of the eNB2, the UE2 maps the Backhaul data to the radio bearers of the UE2 and the eNB2 according to the information carried in the GTP-U layer Backhaul packet header obtained in step 701.

Specifically, a radio bearer of a corresponding type or priority is selected according to TEID or QOS. The Backhaul data types include text, images, audio, video, etc. Different types of data transmission have different requirements, such as transmission rate or distortion, and different types of radio bearers have different transmission characteristics. For example, if the type of the data is text, the transmission rate is low, and the radio bearer with a lower transmission rate can be selected. If the type of the data is audio or video, the data transmission rate is required to ensure data continuity. . Therefore, the Backhaul data needs to be mapped to the radio bearers of UE2 and eNB2 according to the TEID or QOS selecting the corresponding type or corresponding priority radio bearer.

FIG. 8 is a schematic structural diagram of user plane data forwarding an IP layer protocol stack in a data transmission method according to another embodiment of the present invention. FIG. 9 is a flowchart of forwarding user plane data of an IP layer protocol stack in a data transmission method according to another embodiment of the present invention. As shown in FIG. 8 and FIG. 9, UE1 forwards IP layer user plane data to UE2.

Step 900: When receiving the Backhaul data, the UE1 parses the Backhaul data to obtain a destination address, and forwards the Backhaul data to the UE2 at the IP layer.

Step 901: The UE2 parses the received IP layer Backhaul data to obtain RB identification information, and stores the Backhaul data in the UE2, and waits for the scheduling of the eNB2. Specifically, the RB identification information is information that is received together with the IP layer Backhaul data, and the RB identification information specifically includes the RB identification information of the air interface transmission between the eNB1 and the UE1.

Step 902: After receiving the scheduling of the eNB2, the UE2 maps the Backhaul data to the radio bearers of the UE2 and the eNB2 according to the RB identification information obtained in step 901.

Specifically, the RB connection of the Backhaul data in the air interface between the UE2 and the eNB2 may be the same RB connection that the Backhaul data is mapped to the RB between the eNB1 and the UE1, and may also be between the eNB1 and the UE1. The RBs are identified by the same or similar priority types as the RB connections.

FIG. 10 is a schematic structural diagram of user plane data forwarding a PDCP layer protocol stack in a data transmission method according to another embodiment of the present invention. FIG. 11 is a flowchart of forwarding user plane data of a PDCP layer protocol stack in a data transmission method according to another embodiment of the present invention. As shown in FIG. 10 and FIG. 11, UE1 forwards PDCP layer user plane data to UE2.

Step 1100: When receiving the Backhaul data, the UE1 parses the Backhaul data to obtain a destination address, and forwards the Backhaul data to the UE2 at the PDCP layer.

Step 1101: UE2 parses the received PDCP layer Backhaul data to obtain

The RB identifies the information, and stores the Backhaul data in UE2, waiting for the scheduling of eNB2.

Specifically, the RB identification information is information received together with the PDCP layer Backhaul data, and specifically includes RB identification information of the air interface transmission between the eNB1 and the UE1.

Step 1102: After receiving the scheduling of the eNB2, the UE2 maps the Backhaul data to the radio bearers of the UE2 and the eNB2 according to the RB identification information obtained in step 1101.

The UE1 and UE2 of the Type A Relay can also forward the RRC, RLC, and MAC layer PDUs or SDUs of the user plane. The specific forwarding process is similar to the PDCP layer user plane data forwarding process shown in Figure 10 and Figure 11. This is not repeated.

Then, the UE1 forwards the control plane data to the UE2 at different protocol layers as an example for example:

FIG. 12 is a schematic diagram of forwarding a S1AP layer protocol in a data transmission method according to another embodiment of the present invention; Schematic diagram of the data structure of the control plane of the stack. FIG. 13 is a flowchart of forwarding control plane data of an S1AP layer protocol stack in a data transmission method according to another embodiment of the present invention. As shown in FIG. 12 and FIG. 13, UE1 forwards the S1AP layer control plane data to UE2.

Step 1300: When receiving the Backhaul data, the UE1 parses the Backhaul data to obtain a destination address, and forwards the Backhaul data to the UE2 at the S1AP layer.

Step 1301: The UE2 parses the received S1AP layer Backhaul data to obtain information carried in the S1AP layer Backhaul data, and stores the Backhaul data in the UE2, and waits for the scheduling of the eNB2.

Specifically, the information carried in the Backhaul data of the S1AP layer is the type of the Backhaul data or the Backhaul data transmission priority information.

Step 1302: After receiving the scheduling of the eNB2, the UE2 maps the Backhaul data to the radio bearer corresponding to the UE2 and the eNB2 according to the type or priority of the Backhaul data.

The control plane data structure of the X2AP layer protocol stack is the same as that of the S1AP layer control plane data in the data transmission method proposed by the embodiment of the present invention, and the specific forwarding process is similar to the forwarding process of the S1AP layer Backhaul data of the control plane. , I will not repeat them here.

FIG. 14 is a schematic diagram of a data structure of a control plane for forwarding an IP layer protocol stack in a data transmission method according to another embodiment of the present invention. FIG. 15 is a schematic structural diagram of data of a control plane for forwarding a PDCP layer protocol stack in a data transmission method according to another embodiment of the present invention. The process of forwarding the IP layer control plane data and the PDCP layer control plane data of the UE1 is similar to that of the user planes described in FIG. 8 and FIG. 9 and FIG. 10 and FIG. 11, and details are not described herein again.

The RRC, RLC, and MAC layer PDUs or SDUs of the control plane may be forwarded between the UE1 and the UE2 of the Type A Relay. The specific forwarding process is similar to the process of forwarding the PDCP layer data of the control plane. .

Step 503: When receiving the scheduling of the eNB2, the UE2 sends the Backhaul data to the eNB2 through the uplink channel.

Specifically, UE2 transmits the Backhaul data to eNB2 on the uplink channel, for example, PUSCH, by connecting to the radio bearer mapped to eNB2 in step 502.

The data forwarding method in this embodiment is described in detail on the basis of the foregoing embodiment, and the two user equipments are included in the relay node device as an example. The beneficial effects are similar to those in the foregoing embodiment, and details are not described herein again. . FIG. 16 is a flowchart of a data forwarding method according to still another embodiment of the present invention. The method of this embodiment is also applicable to the case where Backhaul data transmission is performed by a relay node device between network devices. The method is performed by a relay node device. The method in this embodiment includes the following steps: Step 1600: A user equipment in the relay node device receives data sent by the first network device through the downlink channel.

Prior to step 1600, the one user device needs to establish a radio resource control connection with the first network device.

Step 1501: The one user equipment sends the data to the second network device by using an uplink channel according to the destination address of the data. The one user equipment can perform data transmission with different time-frequency resources and different network devices.

Before step 1601, the user equipment needs to determine the destination address of the data, and stores the data, waiting for forwarding; the one user equipment also needs to establish a radio resource control connection with the second network device.

Specifically, the destination address is the second network device, that is, the IP address of the network device that receives the data or the identifier of the cell where the second network device is located. The relay node device includes a user equipment, and the one user equipment can perform data transmission with different network devices in different time-frequency resources, that is, the one user equipment can be combined with the first network device and the second network device. At least two network devices establish a connection and forward data. The one user equipment includes not less than two base station interface units to establish a connection with at least two network devices and perform data forwarding. For convenience of description, the relay node device is also called Type A Relay, and the Type A Relay includes only one UE.

Further, the first network device and the second network device may perform data forwarding through multiple relay node devices, and the process of selecting the relay node device in a specific scheduling is similar to the process in the second embodiment, and details are not described herein again.

In the data forwarding method provided by the embodiment, the relay node device includes only one user equipment, and the user equipment receives Backhaul data sent by the first network device by using an uplink channel, and the user equipment also uses the downlink channel to perform the data according to the destination address. The second network device is sent to the second network device, and the uplink channel transmission and the downlink channel transmission use different time-frequency resources, thereby solving the problem of interference in the device of the relay node device, reducing the influence of the interference in the device on the Backhaul link, and improving the wireless Backhaul. Link performance.

According to still another embodiment of the present invention, based on the foregoing embodiment, specifically, the Type A Relay package is used. One UE is included, and the UE is connected to eNB1 and eNB2 as an example for detailed description. FIG. 17 is a schematic structural diagram of a system for forwarding data according to another embodiment of the present invention. FIG. 18 is a flowchart of a data forwarding method according to still another embodiment of the present invention.

As shown in FIG. 17 and FIG. 18, the steps of the data forwarding method in this embodiment are as follows: Step 1800: The UE in the Type A Relay establishes a radio resource control connection with the eNB1 and the eNB2, respectively.

Step 1801: The UE receives Backhaul data sent by the eNB1 by using a downlink channel. Specifically, the UE establishes a wireless connection with the eNB1 in advance, on the downlink channel, for example

The PDSCH receives the Backhaul data transmitted by the eNB1.

Step 1802: The UE parses the Backhaul data, determines a destination address of the Backhaul data, and stores the Backhaul data in the UE, and waits for scheduling by the eNB2.

Specifically, the destination address of the Backhaul data is the IP address of the eNB2 or the identifier of the cell in which the eNB2 is located.

Step 1803: When receiving the scheduling of the eNB2, the UE sends the Backhaul data to the eNB2 through the uplink channel.

Further, the UE forwards the Backhaul data to the eNB2, which may be a PDU or SDU that is forwarded at different protocol layers, including user plane data and control plane data.

The following is an example of the case where the UE forwards the user plane data to the eNB2 at different protocol layers as an example:

The user plane data structure of the GTP-U layer protocol stack forwarded in the data transmission method in this embodiment is the same as the user plane data structure of the forwarding GTP-U layer protocol stack shown in FIG. 6 in the foregoing embodiment. FIG. 19 is a flowchart of forwarding user plane data of a GTP-U layer protocol stack in a data transmission method according to another embodiment of the present invention. As shown in FIG. 6 and FIG. 19, the UE forwards the GTP-U layer user plane data to the eNB2.

Step 1900: When receiving the Backhaul data, the UE parses the Backhaul data to obtain information carried by the GTP-U layer Backhaul packet header, and stores the Backhaul data in the UE, and waits for the scheduling of the eNB2.

Specifically, the GTP-U layer Backhaul packet header carries information such as a Tunnel Endpoint Identifier (TEID) or a Quality of Service (QoS) information, and the TEID may be Type information of the Backhaul data, and the QOS may Yes Priority information for Backhaul data.

Step 1901: After receiving the scheduling of the eNB2, the UE maps the Backhaul data to the radio bearer of the UE and the eNB2 according to the information carried in the GTP-U layer Backhaul packet header obtained in step 1900.

The user plane data structure of the forwarding IP layer protocol stack in the data transmission method in this embodiment is the same as the user plane data structure of the forwarding IP layer protocol stack shown in FIG. 8 in the above embodiment. FIG. 20 is a flowchart of forwarding user plane data of an IP layer protocol stack in a data transmission method according to another embodiment of the present invention. As shown in FIG. 8 and FIG. 20, the UE forwards the IP layer user plane data to the eNB2.

Step 2000: When receiving the Backhaul data, the UE parses the Backhaul data to obtain the RB identification information, and stores the Backhaul data in the UE, and waits for the scheduling of the eNB2.

Specifically, the RB identifier is information that is received together with the IP layer Backhaul data, and the RB identifier information specifically includes the RB identifier information of the air interface transmission between the eNB1 and the UE1.

Step 2001: After receiving the scheduling of the eNB2, the UE maps the Backhaul data to the radio bearer of the UE and the eNB2 according to the RB identification information obtained in step 2000.

The user plane data structure of the PDCP layer protocol stack in the data transmission method proposed in this embodiment is the same as the user plane data structure of the forwarding PDCP layer protocol stack shown in FIG. 10 in the foregoing embodiment. FIG. 21 is a flowchart of forwarding user plane data of a PDCP layer protocol stack in a data transmission method according to another embodiment of the present invention. As shown in FIG. 10 and FIG. 21, the UE forwards the PDCP layer user plane data to the eNB2.

Step 2100: When receiving the Backhaul data, the UE parses the Backhaul data to obtain the RB identification information, and stores the Backhaul data in the UE, and waits for the scheduling of the eNB2.

Specifically, the RB identification information is information that is received together with the PDCP layer Backhaul data, and the RB identification information specifically includes the RB identification information of the air interface transmission between the eNB1 and the UE.

Step 2101: After receiving the scheduling of the eNB2, the UE maps the Backhaul data to the radio bearer of the UE and the eNB2 according to the RB identification information obtained in step 2100.

The Type A Relay UE can also forward the RRC, RLC, and MAC layer PDUs or SDUs of the user plane. The specific forwarding process is similar to the PDCP layer data process of forwarding the user plane shown in Figure 21, and is not described here.

Then, the UE forwards the control plane data to the eNB2 at different protocol layers as an example for example: The data structure of the control plane for forwarding the S1AP layer protocol stack in the data transmission method in this embodiment is the same as the control plane data structure of the forwarding S1AP layer protocol stack shown in FIG. 12 in the foregoing embodiment. FIG. 22 is a flowchart of forwarding control plane data of an S1AP layer protocol stack in a data transmission method according to another embodiment of the present invention. As shown in FIG. 12 and FIG. 22, the UE forwards the S1AP layer control plane data to the eNB2.

Step 2200: When receiving the Backhaul data, the UE parses the Backhaul data to obtain information carried in the S1AP layer Backhaul data, and stores the Backhaul data in the UE, and waits for the scheduling of the eNB2.

Step 2201: After receiving the scheduling of the eNB2, the UE maps the Backhaul data to the radio bearer corresponding to the UE and the eNB2 according to the information carried in the S1AP layer Backhaul data obtained in step 2100.

The control plane data of the X2AP layer is similar to the control plane data of the S1AP layer in the data transmission method of the present embodiment, and the specific forwarding process is similar to the process of forwarding the S1AP layer data of the control plane, and is not described here. .

In the data transmission method provided in this embodiment, the control plane data structure of the forwarding IP layer protocol stack and the control plane data structure of the forwarding PDCP layer protocol stack are respectively compared with the forwarding IP layer protocol stack shown in FIG. 14 and FIG. 15 in the foregoing embodiment. The control plane data structure and the control plane data structure of the PDCP layer protocol stack are the same. The process of forwarding the IP layer control plane data and the PDCP layer control plane data of the UE is similar to the process of the user plane shown in FIG. 20 and FIG. 21, and details are not described herein again.

The UE of the Type A Relay can also forward the RRC, RLC, and MAC layer PDUs or SDUs of the control plane. The specific forwarding process is similar to the PDCP layer data process of the UE forwarding control plane, and is not described here.

The data forwarding method in this embodiment is based on the foregoing embodiment, and is specifically described by using a user equipment in the relay node device as an example. The beneficial effects are similar to those in the foregoing embodiment, and details are not described herein again.

FIG. 23 is a schematic structural diagram of a relay node device according to still another embodiment of the present invention. As shown in FIG. 23, the relay node device 2300 includes at least: a first user equipment 2301 and a second user equipment 2302, and data forwarding can be performed between any two of the user equipments; The first user equipment 2301 is configured to receive data sent by the first network device by using a downlink channel, and forward the data to the second user equipment according to the destination address of the data, so that the second user equipment 2302 passes the uplink. The channel transmits the data forwarded by the first user equipment 2301 to the second network device.

Further, in the above solution, the data forwarded by the first user equipment 2301 includes data of different protocol layers.

Further, in the above solution, the data forwarded by the first user equipment 2301 includes user plane data and/or control plane data.

The first user equipment 2301 in the foregoing solution can perform data transmission with different network devices in different time-frequency resources.

The relay node device provided by this embodiment may perform the data forwarding method of the relay node device that includes the at least two user equipments provided by any of the foregoing embodiments, and the specific implementation process and beneficial effects thereof are similar to the foregoing embodiments. This will not be repeated here.

FIG. 24 is a schematic structural diagram of a relay node device according to still another embodiment of the present invention. As shown in FIG. 24, the relay node device 2400 includes: a first user equipment 2401, where the first user equipment 2401 can perform data transmission with different time-frequency resources and different network devices;

The first user equipment 2401 is configured to receive data sent by the first network device by using a downlink channel, and is further configured to send the data to the second network device by using an uplink channel according to the destination address of the data.

Further, in the above solution, the data forwarded by the first user equipment 2401 includes data of different protocol layers.

Further, in the above solution, the data forwarded by the first user equipment 2401 includes user plane data and/or control plane data.

The relay node device provided by this embodiment may perform the data forwarding method of the user equipment provided by the relay node device provided by any of the foregoing embodiments, and the specific implementation process and beneficial effects thereof are similar to the foregoing embodiments. Let me repeat.

FIG. 25 is a schematic structural diagram of a relay node device according to still another embodiment of the present invention. As shown in FIG. 25, the relay node device 2500 includes: a first user equipment 2501 and a second user equipment 2502, and data forwarding can be performed between any two of the user equipments;

The first user equipment 2501 includes: a first receiver 2503, configured to receive data sent by the first network device by using a downlink channel; a first transmitter 2504, configured to forward the data to the second user equipment 2502 according to the destination address of the data;

The second user device 2502 includes:

The second receiver 2505 is configured to receive the data forwarded by the first transmitter 2504. The second transmitter 2506 sends the data received by the second receiver 2505 to the second network device by using an uplink channel.

In the above scheme, the data forwarded by the first transmitter 2504 includes data of different protocol layers.

In the above solution, the data forwarded by the first transmitter 2504 includes user plane data and

/ or control surface data.

Further, in the above solution, the first receiver 2503 can receive data sent by different network devices in different time-frequency resources;

The first transmitter 2504 is capable of transmitting data to different network devices at different time-frequency resources. The relay node device provided by this embodiment may perform the data forwarding method of the relay node device that includes the at least two user equipments provided by any of the foregoing embodiments, and the specific implementation process and beneficial effects thereof are similar to the foregoing embodiments. This will not be repeated here.

FIG. 26 is a schematic structural diagram of a relay node device according to still another embodiment of the present invention. As shown in FIG. 26, the relay node device 2600 includes: a first user equipment 2601;

The first user equipment 2601 includes:

The receiver 2602 is configured to receive data sent by the first network device by using a downlink channel, and the transmitter 2603 is configured to send, by using an uplink channel, the data received by the receiver 2602 to the second network device according to the destination address of the data.

The receiver 2602 can receive data transmitted by different network devices at different time-frequency resources; the transmitter 2603 can send data to different network devices at different time-frequency resources.

Further, in the above solution, the data transmitted by the transmitter 2603 includes data of different protocol layers.

Further, in the above solution, the data transmitted by the transmitter 2603 includes user plane data and/or control plane data.

The relay node device provided in this embodiment may perform the relay provided by any of the foregoing embodiments. The node device includes a data forwarding method of the user equipment, and the specific implementation process and the beneficial effects are similar to the foregoing embodiments, and details are not described herein again.

FIG. 27 is a schematic structural diagram of a network system according to still another embodiment of the present invention. The embodiment of the present invention further provides a network system, where the network system 2700 includes at least one relay node device 2701 including at least two user equipments, and the first network device 2702 and the second network, which are provided by any of the foregoing embodiments. The device 2703, wherein the first network device 2702 is connected to the second network device 2703 through each relay node device 2701.

The network system provided by this embodiment may perform the data forwarding method provided by the foregoing embodiment by using the relay node device that includes the at least two user equipments provided by any of the foregoing embodiments, and the specific implementation process and beneficial effects thereof are similar to the foregoing embodiments. , will not repeat them here.

FIG. 28 is a schematic structural diagram of a network system according to still another embodiment of the present invention. The embodiment of the present invention further provides a network system, where the network system 2800 includes at least one relay node device 2801 including one user equipment, and the first network device 2802 and the second network device 2803, which are provided by any of the foregoing embodiments. The first network device 2802 is connected to the second network device 2803 through each relay node device 2801.

The network system provided in this embodiment can perform the data forwarding method provided in the foregoing embodiment by using the relay node device that includes a user equipment provided by any of the foregoing embodiments, and the specific implementation process and beneficial effects thereof are similar to the foregoing embodiment. This will not be repeated here.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions. The foregoing program may be stored in a computer readable storage medium, and when executed, the program includes The foregoing steps of the method embodiment; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

claims

1. A data forwarding method, characterized by including:

One user equipment in the relay node equipment receives data sent by the first network equipment through the downlink channel;

The one user equipment forwards the data to another user equipment in the relay node device according to the destination address of the data, so that the other user equipment sends the data to the second network device through an uplink channel. Data; The relay node device includes at least two user equipments, and data can be forwarded between any two of the user equipments.

2. The method according to claim 1, characterized in that the data includes data of different protocol layers.

3. The method according to claim 1 or 2, characterized in that the data includes user plane data and/or control plane data.

4. The method according to claim 1, characterized in that the one user equipment can perform data transmission with different network devices in different time-frequency resources.

5. A data forwarding method, characterized by including:

The one user equipment sends the data to the second network device through an uplink channel according to the destination address of the data; the one user equipment can transmit data with different network devices in different time-frequency resources.

6. The method according to claim 5, characterized in that the data includes data of different protocol layers.

7. The method according to claim 5 or 6, characterized in that the data includes user plane data and/or control plane data.

8. A relay node device, characterized in that it includes at least two user equipments: a first user equipment and a second user equipment, and data can be forwarded between any two user equipments;

The first user equipment is configured to receive data sent by the first network device through a downlink channel, and forward the data to the second user equipment according to the destination address of the data, so that the second user equipment Send the data forwarded by the first user equipment to the second network equipment through the uplink channel. According to.

9. The relay node device according to claim 8, wherein the data forwarded by the first user equipment includes data of different protocol layers.

10. The relay node device according to claim 8 or 9, characterized in that the data forwarded by the first user equipment includes user plane data and/or control plane data.

11. The relay node device according to claim 8, characterized in that the first user equipment can perform data transmission with different network devices in different time-frequency resources.

12. A relay node device, characterized in that it includes:

One user equipment: a first user equipment, the first user equipment can perform data transmission with different network devices in different time-frequency resources;

The first user equipment is configured to receive data sent by the first network device through a downlink channel, and is also configured to send the data to the second network device through an uplink channel according to the destination address of the data.

13. The relay node device according to claim 12, wherein the data forwarded by the first user equipment includes data of different protocol layers.

14. The relay node device according to claim 12 or 13, characterized in that the data forwarded by the first user equipment includes user plane data and/or control plane data.

15. A relay node device, characterized in that it includes at least two user equipments: a first user equipment and a second user equipment, and data can be forwarded between any two user equipments; the first user equipment include:

The first receiver is used to receive data sent by the first network device through the downlink channel; the first transmitter is used to forward the data to the second user equipment according to the destination address of the data;

The second user equipment includes:

a second receiver, configured to receive the data forwarded by the first transmitter;

The second transmitter sends the data received by the second receiver to the second network device through an uplink channel.

16. The relay node device according to claim 15, wherein the data forwarded by the first transmitter includes data of different protocol layers.

17. The relay node device according to claim 15 or 16, wherein the data forwarded by the first transmitter includes user plane data and/or control plane data.

18. The relay node device according to claim 15, characterized in that the first receiver can receive data sent by different network devices in different time-frequency resources;

The first transmitter can send data to different network devices in different time-frequency resources.

19. A relay node device, characterized in that it includes: a first user device;

The first user equipment includes:

A receiver, configured to receive data sent by the first network device through the downlink channel;

A transmitter, configured to send the data received by the receiver to the second network device through an uplink channel according to the destination address of the data;

The receiver can receive data sent by different network devices using different time-frequency resources; and the transmitter can send data to different network devices using different time-frequency resources.

20. The relay node device according to claim 19, characterized in that the data sent by the transmitter includes data of different protocol layers.

21. The relay node device according to claim 19 or 20, characterized in that the data sent by the transmitter includes user plane data and/or control plane data.

22. A network system, characterized by comprising at least one relay node device according to any one of claims 8-11 or 15-18, as well as a first network device and a second network device; wherein, the A network device is connected to the second network device through each of the relay node devices.

23. A network system, characterized by comprising at least one relay node device according to any one of claims 12-14 or 19-21, as well as a first network device and a second network device; wherein, the A network device is connected to the second network device through each of the relay node devices.