JP2020191672A - Relay transmission method and device - Google Patents

Abstract

To provide a relay transmission method and a device that can reduce the complexity and delay of data processing.SOLUTION: In a wireless communication system, a relay terminal facility receives an adaptation layer PDU which a remote terminal facility transmits to a network facility. In the adaptation layer PDU, data contained in the adaptation layer PDU is capsulated by an adaptation layer by the remote terminal facility, and includes identification information on the remote terminal facility. The relay terminal facility transfers the data contained in the adaptation layer PDU to the network facility based on the identification information on the remote terminal facility.SELECTED DRAWING: Figure 3

Description

The present invention relates to the field of communication, and more specifically to relay transmission methods and devices.

Equipment-to-equipment (D2D: Device-to-Device) technology means that adjacent terminal equipment can transmit data over a direct connection link within a short range without being transferred by network equipment. means. D2D communication can share licensed frequency band resources with cellular systems to form a unified mixed cellular-D2D network. In the mixed network, some terminal equipment can still operate in cellular communication mode, i.e., it is possible to communicate with other terminal equipment via the network equipment, but some terminals. The equipment can operate in the D2D communication mode, that is, can directly transmit data to the other terminal equipment via a direct link with the other terminal equipment.

In addition, it is possible to transmit data with the terminal equipment via the D2D relay auxiliary network equipment. In this case, the D2D communication mode is used between the D2D relay and the D2D terminal, and the D2D relay and the network equipment During that time, the cellular communication mode is used. The D2D relay receives and transfers data by a half-duplex method, and executes mode conversion in the process of receiving and transferring.

In the prior art, D2D relay relays data transmission between a D2D terminal and network equipment via an Internet Protocol (IP) layer (ie, layer 3), and the received data packets are sequentially delivered. Layer 1 (that is, physical layer), layer 2 (media access control (MAC: Media Access Control) layer, wireless link control (RLC: Radio Link Control) layer, packet data convergence protocol (PDCP: Packet Data Convergence Protocol) layer Including), and layer 3 performs decapsulation processing, and sequentially undergoes layer 3, layer 2 and layer 1 capselling processing to realize data relay, so the complexity is relatively high and data is processed. However, the delay is relatively large.

An embodiment of the present invention discloses a relay transmission method and apparatus capable of reducing the complexity and data delay of a relay transmission process.

In the first aspect,
The relay terminal equipment receives the adaptation layer protocol data unit (PDU) transmitted by the remote terminal equipment to the network equipment, where the adaptation layer PDU includes the identification information of the remote terminal equipment, and the adaptation layer PDU is The remote terminal equipment is acquired by capsulating the data contained in the adaptation layer PDU by the adaptation layer of layer 2, and the relay terminal equipment is the adaptation layer of layer 2 and is obtained by the adaptation layer PDU. Acquiring the identification information of the remote terminal equipment included in the above, and the relay terminal equipment transfers the data contained in the adaptation layer PDU to the network equipment based on the acquired identification information of the remote terminal equipment. To provide a relay transmission method including to do.

Therefore, in the relay transfer method according to the embodiment of the present invention, the remote terminal equipment transmits the adaptation layer PDU to the relay terminal equipment, the adaptation layer PDU includes the identification information of the remote terminal equipment, and the relay terminal equipment is It is possible for the adaptation layer to identify the identification information of the remote terminal equipment included in the adaptation layer PDU, and it is possible to transfer the data contained in the adaptation layer PDU based on the identification information of the remote terminal equipment. This reduces the processing complexity of the relay terminal equipment, reduces the transmission delay of the relay data, and improves the overall performance of the system, compared to the prior art method in which the relay terminal equipment uses layer 3 relay. It is possible to make it.

Optionally, the communication interface between the relay terminal equipment and the remote terminal equipment can be the first interface, and the communication interface between the relay terminal equipment and the network equipment is the second interface. It can be an interface.

Optionally, the user plane protocol stack for relay transmission of the relay terminal equipment can include layer 1 and layer 2, and optionally does not include layer 3. In the user plane protocol stack corresponding to the second interface of the relay terminal equipment, the layer 1 can be specifically a physical layer, and the layer 2 can include only the MAC layer. , Or it is possible to further include an RLC layer and a PDCP layer on the basis of the MAC layer.

Optionally, in the user plane protocol stack corresponding to the first interface of the relay terminal facility, layer 2 can include only the bottom layer and the adaptation layer located above the bottom layer, where the above The adaptation layer can be compatible with the adaptation layer located above the bottom layer in layer 2 of the user plane protocol stack of the remote terminal equipment, or the RLC layer and PDCP layer on the basis of the bottom layer and the adaptation layer. The adaptation layer can be located at an arbitrary position on the bottom layer, for example, the adaptation layer can be located between the bottom layer and the RLC layer.

Optionally, in the user plane protocol stack corresponding to the first interface of the relay terminal equipment and the remote terminal equipment, the bottom layers of layer 1 and layer 2 correspond to the D2D communication technology used on the first interface. It is possible to do. For example, when the D2D communication technology is specifically an LTE side link technology, the layer 1 can be a physical layer and the bottom layer of the layer 2 can be a MAC layer. ..

Thereby, an adaptation layer is installed in layer 2 of the remote terminal equipment and the relay terminal equipment so that the first interface between the remote terminal equipment and the relay terminal equipment supports an arbitrary D2D communication technology. It is possible to improve the compatibility and extensibility of the system.

Optionally, the user plane protocol stack for relay transmission of remote terminal equipment and network equipment may include layer 1 and layer 2, and optionally may not include layer 3. The remote terminal equipment user plane protocol stack layer 2 can include a bottom layer, an adaptation layer, an RLC layer and a PDCP layer, and the network equipment user plane protocol stack layer 2 is a MAC layer and an RLC layer. And PDCP layers can be included. Optionally, layer 1 of the user plane protocol stack of the remote terminal equipment can be on par with layer 1 of the user plane protocol stack of the relay terminal equipment, and is adaptive with the bottom layer of layer 2 of the remote terminal equipment. The layers can be equal to each other with the bottom layer and the adaptation layer of the layer 2 of the relay terminal equipment, respectively. Optionally, when layer 2 of the relay terminal equipment does not include the RLC layer and the PDCP layer, the RLC layer of the user plane protocol stack of the remote terminal equipment and the RLC layer of the user plane protocol stack of the network equipment are equal to each other. It is possible that the PDCP layer of the user plane protocol stack of the remote terminal equipment and the PDCP layer of the user plane protocol stack of the network equipment are equal to each other.

The adaptation layer PDU received by the relay terminal equipment can include the identification information of the terminal equipment, and here, optionally, the identification information of the remote terminal equipment is the adaptation layer identifier of the remote terminal equipment or It is possible to include the terminal equipment identifier of the remote terminal equipment. Optionally, the adaptation layer identifier can be assigned in the process of the network equipment establishing bearings for the remote terminal equipment.

Optionally, the relay terminal equipment can identify the identification information of the remote terminal equipment included in the adaptation layer PDU in the adaptation layer of the layer 2 and determine the remote terminal equipment corresponding to the adaptation layer PDU. Is.

Optionally, the adaptation layer PDU further includes bearing identification information for the bearing to which the data belongs.

The bearing can be a wireless bearing established between the remote terminal equipment and the network equipment. Optionally, the bearing can include a first bearing between the remote terminal equipment and the relay terminal equipment and a second bearing between the relay terminal equipment and the network equipment. The first bearing and the second bearing can correspond to the same or different bearing identification information.

Optionally, the bearing identification information of the bearing can include a bearing identifier or a logical channel identifier. For example, the bearing identification information of the bearing can be specifically a bearing identifier of the first bearing.

In the first possible embodiment of the first aspect, the relay terminal equipment transfers the data contained in the adaptation layer PDU to the network equipment based on the acquired identification information of the remote terminal equipment. That is, the relay terminal equipment generates the layer 2PDU corresponding to the second interface based on the identification information of the remote terminal equipment, and the second interface is the relay terminal equipment and the above. It includes being a communication interface with the network equipment, and the relay terminal equipment transmitting the layer 2PDU corresponding to the second interface to the network equipment.

Optionally, the relay terminal facility can transmit a data packet containing the data to the network facility, where the data packet may specifically be a layer 1 data frame or a layer 2 PDU. It is possible, where the layer 2 PDU can be specifically a MAC PDU, or if the user plane protocol stack of the relay terminal equipment includes an RLC layer and a PDCP layer, the layer 2 PDU is specifically. It can be a MAC PDU, an RLC PDU or a PDCP PDU.

Optionally, the layer 2PDU can include a terminal equipment identifier of the remote terminal equipment, where the relay terminal equipment stores a correspondence between the adaptation layer identifier and the terminal equipment identifier. It is possible.

Optionally, the layer 2PDU may further include bearing identification information of the bearing to which the data belongs, such as bearing identification information of the second bearing.

In accordance with the above possible embodiment, in the second possible embodiment of the first aspect, the header portion of the adaptation layer PDU includes instruction information, and the instruction information is included in the adaptation layer PDU. The purpose is to show that the data is relay data, and the relay terminal equipment transfers the data contained in the adaptation layer PDU to the network equipment based on the acquired identification information of the remote terminal equipment. Before, the above relay transmission method
It further includes determining that the relay terminal equipment needs to transfer the data contained in the adaptation layer PDU to the network equipment based on the instruction information included in the adaptation layer PDU.

Optionally, the header portion of the adaptation layer PDU can include instruction information, such as indicating that the data contained in the adaptation layer PDU is relay data. Thereby, the relay terminal equipment can determine that it is necessary to transfer the data included in the adaptation layer PDU based on the instruction information of the header portion after receiving the adaptation layer PDU.

Optionally, the instructional information of the adaptation layer PDU can be explicitly or implicitly instructed.

Optionally, the relay terminal facility can determine whether the data contained in the adaptation layer PDU is relay data by determining whether the received adaptation layer PDU includes the bearing identification area. Is. For example, when the received adaptation layer PDU does not include the bearing identification area, the above relay terminal equipment transmits the data contained in the adaptation layer PDU to the relay terminal equipment itself, not the relay data. It is possible to determine that it is a thing. Further, for example, when the received adaptation layer PDU includes the bearing identification area, the relay terminal equipment can determine that the data contained in the adaptation layer PDU is relay data and needs to be transferred to the network equipment. It is possible.

Optionally, the relay terminal equipment can determine whether or not the data contained in the adaptation layer PDU is relay data by determining the bearing identification information in the bearing identification area of the received adaptation layer PDU. Is. For example, it is possible to predefine or preset the range of relay bearing identifiers for bearings for relay transmission. In this case, if it is selectively determined that the bearing identification information included in the adaptation layer PDU received by the relay terminal equipment belongs to the range of the relay bearing identifier, the data included in the adaptation layer PDU is the relay data. It is possible to confirm. Optionally, if the relay terminal equipment determines that the received bearing identification information contained in the adaptation layer PDU does not belong to the range of the relay bearing identifier, it determines that the data contained in the adaptation layer PDU is not relay data. It is possible.

In accordance with the above possible embodiment, in the third possible embodiment of the first aspect, the relay terminal equipment adapts to the network equipment based on the acquired identification information of the remote terminal equipment. Transferring the data contained in the layered PDU means that the relay terminal equipment determines the preamble corresponding to the identification information of the remote terminal equipment, and that the relay terminal equipment transmits the preamble to the network equipment. , The relay terminal equipment receives the uplink grant transmitted by the network equipment based on the preamble, and the uplink grant includes the uplink transmission resource allocated by the network equipment, and the relay terminal equipment. Includes using the uplink transmission resource to transmit the data contained in the adaptation layer PDU to the network equipment.

In accordance with the above possible embodiment, in the fourth possible embodiment of the first aspect, the relay terminal equipment is adapted to the network equipment based on the acquired identification information of the remote terminal equipment. To transfer the data contained in the layer PDU, the relay terminal equipment transmits a BSR to the network equipment, and the BSR includes the terminal equipment identifier of the remote terminal equipment and the relay terminal equipment. However, the network equipment receives the PDCCH transmitted based on the BSR, the PDCCH is for scheduling the uplink data transmission of the remote terminal equipment, and the relay terminal equipment is connected to the PDCCH. Based on this, it includes transmitting the data contained in the adaptation layer PDU to the network equipment.

The PDCCH can include an uplink grant. The relay terminal equipment determines that the network equipment is an uplink transmission resource allocated by the remote terminal equipment based on the uplink grant of the PDCCH, and includes the transmission resource in the adaptation layer PDU using the transmission resource. It is possible to send the data to be sent.

In the second aspect,
The remote terminal equipment acquires the PDU by capsulating the data to be transmitted to the network equipment in the adaptation layer of the layer 2, and the above-mentioned adaptation layer PDU includes the identification information of the above-mentioned remote terminal equipment. , The remote terminal equipment provides other relay transmission methods, including transmitting the adaptation layer PDU to the relay terminal equipment.

In the third aspect,
The relay terminal equipment receives the data packet transmitted by the network equipment to the remote terminal equipment, and the relay terminal equipment performs the data included in the data packet in the adaptation layer of layer 2 to acquire the PDU. Here, the adaptation layer PDU includes other relay transmission methods including including the identification information of the remote terminal equipment and the relay terminal equipment transmitting the adaptation layer PDU to the remote terminal equipment. provide.

Optionally, the data packet can include a terminal equipment identifier of the remote terminal equipment, or the data packet is scheduled via a PDCCH scrambled by RNTI of the remote terminal equipment. Or the data packet can be transmitted using the transmission resource corresponding to the remote terminal facility.

Optionally, the identification information of the remote terminal equipment included in the adaptation layer PDU includes the adaptation layer identifier of the remote terminal equipment or the terminal equipment identifier of the remote terminal equipment.

Optionally, the data packet may further include bearing identification information of the bearing to which the data belongs, such as bearing identification information of the second bearing, and correspondingly, the adaptation layer PDU It is also possible to include bearing identification information for the bearing, such as bearing identification information for the first bearing.

Optionally, the data packet can be specifically a layer 1 data frame or a layer 2 PDU.

In the first possible embodiment of the third aspect, the relay terminal equipment receives the data packet transmitted by the network equipment to the remote terminal equipment, the relay terminal equipment receives the data packet, and the network equipment is the remote terminal equipment. The layer 2PDU corresponding to the second interface transmitted to the above is received, and here, the layer 2PDU corresponding to the second interface includes the above data, and the second interface is the relay terminal equipment and the network. Includes being a communication interface to and from the equipment.

Optionally, the layer 2 PDU can be specifically a MAC PDU, RLC PDU or PDCP PDU, in accordance with the possible embodiments, in the second possible embodiment of the third aspect. The data packet includes a relay specific logical channel identifier, and the relay terminal equipment relays the data included in the data packet at the adaptation layer of layer 2 before acquiring the adaptation layer PDU. The transmission method further includes determining that the relay terminal equipment needs to transfer the data contained in the data packet based on the relay specific logical channel identifier.

The relay specific logical channel identifier can be used to indicate relay transmission.

In line with the possible embodiments, in the third possible embodiment of the third aspect, the data packet is delivered by a PDCCH in which the network equipment is scrambled by a relay specific radio network temporary identifier (RNTI). The relay transmission method is the relay terminal before the relay terminal equipment performs the data contained in the data packet in the adaptation layer of the layer 2 to perform the adaptation processing of the data packet to the adaptation layer PDU. It further comprises determining that the equipment needs to transfer the data contained in the data packet based on the relay specific RNTI used in the PDCCH for scheduling the data packet.

The relay specific RNTI can be used to instruct relay transmission.

In the fourth aspect,
The remote terminal equipment receives the adaptation layer protocol data unit (PDU) transmitted by the relay terminal equipment, and here, the adaptation layer PDU includes the identification information of the remote terminal equipment, and the remote terminal equipment The adaptation layer of layer 2 acquires the identification information of the remote terminal equipment included in the adaptation layer PDU, and the remote terminal equipment obtains the identification information of the remote terminal equipment based on the acquired identification information of the remote terminal equipment. Provide other relay transmission methods, including determining the remote terminal equipment corresponding to.

Optionally, the remote terminal equipment can determine whether or not the adaptation layer PDU has transmitted to itself based on the acquired identification information of the remote terminal equipment included in the adaptation layer PDU.

If it is selectively determined that the adaptation layer PDU is transmitted to itself, the remote terminal equipment can demodulate the data contained in the adaptation layer PDU.

If it is selectively determined that the adaptation layer PDU has not been transmitted to itself, the remote terminal equipment can discard the adaptation layer PDU.

In the fifth aspect,
Provided is a relay transmission device for carrying out the method of the first aspect or any possible embodiment of the first aspect. Specifically, the relay transmission device includes a unit configured to perform the method of any possible embodiment of the first aspect or the first aspect.

In the sixth aspect,
Provided is another relay transmission device for carrying out the method of the second aspect or any possible embodiment of the second aspect. Specifically, the relay transmission device includes a unit configured to perform the method of any possible embodiment of the second aspect or the second aspect.

In the seventh aspect,
Provided is another relay transmission device for carrying out the method of the third aspect or any possible embodiment of the third aspect. Specifically, the relay transmission device includes a unit configured to perform the method of any possible embodiment of the third aspect or the third aspect.

In the eighth aspect,
Provided is another relay transmission device for carrying out the method of the fourth aspect or any possible embodiment of the fourth aspect. Specifically, the relay transmission device includes a unit configured to perform the method of any possible embodiment of the fourth aspect or the fourth aspect.

In the ninth aspect,
When the processor includes a memory for storing an instruction and a processor for executing an instruction stored in the memory, and the processor executes an instruction stored in the memory, this execution is performed by the processor. Provides other relay transmission devices that allow the method in the first aspect or any possible embodiment of the first aspect to be performed.

In the tenth aspect,
When the processor includes a memory for storing an instruction and a processor for executing an instruction stored in the memory, and the processor executes an instruction stored in the memory, this execution is performed by the processor. Provide other relay transmission devices that allow the method in the second aspect or any possible embodiment of the second aspect to be performed.

In the eleventh aspect,
When the processor includes a memory for storing an instruction and a processor for executing an instruction stored in the memory, and the processor executes an instruction stored in the memory, this execution is performed by the processor. Provide other relay transmission devices that allow the method in the third aspect or any possible embodiment of the third aspect to be performed.

In the twelfth aspect
When the processor includes a memory for storing an instruction and a processor for executing an instruction stored in the memory, and the processor executes an instruction stored in the memory, this execution is performed by the processor. Provide other relay transmission devices that allow the method in the fourth aspect or any possible embodiment of the fourth aspect to be performed.

In the thirteenth aspect
Provided is a computer-readable medium for storing a computer program in which instructions for performing the method of the first aspect or any possible embodiment of the first aspect are stored.

In the fourteenth aspect,
Provided is another computer-readable medium for storing a computer program in which instructions for performing the method of the second aspect or any possible embodiment of the second aspect are stored.

In the fifteenth aspect
Provided is another computer readable medium for storing a computer program in which instructions for performing the method of the third aspect or any possible embodiment of the third aspect are stored.

In the sixteenth aspect
Provided is another computer-readable medium for storing a computer program in which instructions for performing the method of the fourth aspect or any possible embodiment of the fourth aspect are stored.

In the seventeenth aspect
Provide a relay transmission system including a relay terminal facility, a remote terminal facility, and a network facility.

Optionally, the relay terminal equipment can be the device in any possible embodiment of the fifth or fifth aspect, and the remote terminal equipment can be the sixth aspect or the sixth aspect. It is possible that the device is in any possible embodiment of the above embodiment.

Optionally, the relay terminal equipment can be the device in any possible embodiment of the seventh or seventh aspect, the remote terminal equipment being the eighth or eighth aspect. It can be the device in any possible embodiment of the embodiment.

It is a schematic flowchart of the wireless communication system applied to the Example of this invention. It is a schematic schematic diagram of the user plane protocol stack of each facility for relay transmission provided by the Example of this invention. FIG. 6 is a schematic schematic diagram of another user plane protocol stack of each facility for relay transmission provided by an embodiment of the present invention. It is a schematic flowchart of the relay transmission method provided by the Example of this invention. It is a schematic flowchart of the relay transmission method provided by another embodiment of this invention. It is a schematic block diagram of the relay transmission apparatus provided by the Example of this invention. It is a schematic block diagram of another relay transmission apparatus provided by the Example of this invention. It is a schematic block diagram of another relay transmission apparatus provided by the Example of this invention. It is a schematic block diagram of another relay transmission apparatus provided by the Example of this invention. It is a schematic block diagram of another relay transmission apparatus provided by the Example of this invention. It is a schematic block diagram of another relay transmission apparatus provided by the Example of this invention.

In order to more clearly explain the technical solutions of the examples of the present invention, the drawings necessary for explaining the examples of the present invention or the prior art will be briefly described above, and clearly, the following description will be given. The drawings in the above are merely examples of a part of the present invention, and those skilled in the art can obtain other drawings according to these drawings without any creative effort.

The following clearly and completely describes the technical solutions in the examples of the present invention in accordance with the drawings in the examples of the present invention, and the clearly described examples are all the examples of the present invention. Not just some examples. Based on the examples of the present invention, all other examples obtained by those skilled in the art without any creative effort are within the scope of the present invention.

It should be understood that the terms "system" and "network" in the text can be used interchangeably in the text. The term "and / or" in the text merely describes the relationship of the relevant object, and three relationships can exist, for example, if A and / or B exist only in A. When A and B exist at the same time, it means three cases where only B exists. In addition, the code "/" in the text generally means that the contextually related objects are "or" related.

FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present invention, and the wireless communication system 100 can include at least one network facility 110. The network equipment 110 can be equipment that communicates with the terminal equipment. Each network facility 110 can provide communication coverage to a specific geographic area and can communicate with terminal equipment located within the coverage area. The network equipment 110 may be a base station (BTS: Base Transfer Station) in a global mobile communication (GSM) system or a code division multiple access (CDMA) system, and may be a wideband code division multiple access (BTS). It can be a base station (NB: CodeB) in a WCDMA) system, it can be an evolutionary base station (eNB or eNodeB: Evolutional Node B) in a long term evolution (LTE) system, and it can be a cloud radio. It may be a wireless controller in a connected network (CRAN: Cloud Radio Access Network), and the network equipment may be a relay station, an access point, an in-vehicle equipment, a wearable equipment, a network-side equipment in a future 5G network, or a public of future evolution. It may be network equipment in a land mobile network (PLMN: Public Land Mobile Network) or the like.

The wireless communication system 100 further includes a plurality of terminal equipment 120s located within the coverage range of the network equipment 110. The terminal equipment 120 can be moved or fixed. The terminal equipment 120 includes an access terminal, a subscriber equipment (UE: User Equipment), a subscriber unit, a subscriber station, a mobile station, a mobile stand, a remote station, a remote terminal, a mobile equipment, a user terminal, a terminal, and a wireless communication equipment. , Can refer to a user agent or user device. Access terminals include mobile phones, codeless telephones, session initiation protocol (SIP) telephones, wireless subscriber line (WLL: Wireless Local Loop) stations, personal digital assistants (PDAs), and wireless communication functions. It may be handheld equipment, computing equipment, or other processing equipment connected to a wireless modem, in-vehicle equipment, wearable equipment and terminal equipment in the future 5G network, terminal equipment in the future evolution PLMN, and the like.

FIG. 1 illustrates one network facility and six terminal facilities, and selectively, the wireless communication system 100 can include a plurality of network facilities, and is within the coverage range of each network facility. It is also possible to include other numbers of terminal equipment, but the embodiments of the present invention are not limited thereto. In addition, the wireless communication system 100 includes a mobile management entity (MME: Mobile Management Gateway), a serving gateway (S-GW: Serving Gateway), a packet data network gateway (P-GW: Packet Data Network Gateway), and the like. The network entities of the present invention can be further included, but the embodiments of the present invention are not limited thereto.

Specifically, the terminal equipment 120 can communicate in the cellular communication mode or the D2D communication mode, and here, in the cellular communication mode, the terminal equipment communicates with the network equipment via other terminal equipment. In the D2D communication mode, the terminal equipment can directly communicate with other terminal equipment via the D2D link.

In the plurality of terminal equipment 120 shown in FIG. 1, data is transmitted between the cellular terminal equipment 1 and the cellular terminal equipment 2 that communicate with the network equipment 110 using cellular communication, and between the relay terminal equipment and the network equipment. D2D terminal equipment 1 and D2D terminal equipment 2 and relay terminal equipment 1 and relay terminal equipment 2 are exemplified, and the relay terminal equipment may relay and transmit uplink data transmitted by the D2D terminal equipment to network equipment. It is possible, or it is possible to relay and transmit the downlink data transmitted by the network equipment to the D2D terminal equipment. It is also possible to provide a first interface such as a PC5 interface between the relay terminal equipment and the D2D terminal equipment, and communicate using the D2D communication technology, wherein the above D2D communication technology is used. Specifically, it may be a side link (SL: SideLink) technology in LTE, a technology such as WIFI or Bluetooth in WLAN, or another D2D communication technology, which is the present invention. Examples are not limited to this. A second interface, such as a Uu interface, can be provided between the relay terminal equipment and the network equipment, and in order to communicate using cellular communication technology and assist in understanding, the above-mentioned first is described below. The first interface will be specifically described as a PC5 interface, and the second interface may be specifically described as a Uu interface. However, the first interface and the second interface may be specifically referred to by other names. It may have, and the examples of the present invention are not limited thereto.

In the prior art, the relay terminal equipment relays in a layer 3 relay system, and the delay in data processing is relatively large. In the embodiment of the present invention, the relay terminal equipment can relay the data transfer between the network equipment and the D2D terminal equipment by using the relay method of layer 1 or layer 2, and at this time, the Uu interface. The relay data transmitted in the above can use the layer 1 data frame or the layer 2 PDU method, and the relay data transmitted to the PC5 interface can use the layer 2 PDU. Examples are not limited to this.

2a and 2b schematically show the user interface protocol stack of each facility used for relay transmission, respectively. As shown in FIG. 2a, the user plane protocol stack of the D2D terminal equipment, the relay terminal equipment and the network equipment for relay transmission can include layers 1 and 2, and here, of the above relay terminal equipment. The layers 1 and 2 of the PC5 interface are equal layers to the layers 1 and 2 of the PC5 interface of the D2D terminal equipment, respectively, and the layers 1 and 2 of the Uu interface of the relay terminal equipment are the network equipments, respectively. The layers 1 and 2 of the Uu interface of the above are equal layers to each other. At this time, selectively, the user plane protocol stack for relay transmission between the relay terminal equipment, the network equipment, and the D2D terminal equipment may not include layer 3, but the embodiment of the present invention is limited to this. Not done.

Specifically, in the user plane (abbreviated as Uu-U) protocol stack of the Uu interface of the relay terminal equipment and the network equipment, the layer 1 can be specifically a physical layer (PHY), and is a layer. 2 can include a MAC layer, an RLC layer and a PDCP layer. In the user plane (abbreviated as PC5-U) protocol stack of the PC5 interface between the relay terminal equipment and the D2D terminal equipment, a relatively low layer (for example, layer 1 or the bottom layer of layer 1 and layer 2) is the PC5 interface. It is possible to correspond to the specific D2D communication technology used in, for example, when the above D2D communication technology is specifically the side link technology of LTE, the user plane protocol stack of the above PC5 interface is relatively relatively. The lower layer can include a PHY layer and a MAC layer, and when the D2D communication technology is specifically Wifi technology, the relatively lower layer of the user plane protocol stack of the PC5 interface is the PHY layer. The embodiments of the present invention are not limited to this, such as being able to include a MAC sublayer.

As shown in FIG. 2a, in the user plane protocol stack of the PC5 interface of the embodiment of the present invention, it is possible to newly add an adaptation (ADP: ADPtive) layer in order to identify the D2D terminal equipment. The adaptation layer can then be used to identify and capsulate relay data. Specifically, the adaptation layer can be further used to identify the identification information of the D2D terminal equipment, for example, the identifier of the adaptation layer of the D2D terminal equipment selectively indicates relay transmission. It can also be used to identify a relay specific logical channel identifier (LCID: Logical Channel Identifier) of. In addition, the adaptation layer can also be used to transform the data transmitted using various D2D communication technologies received from the lower layers into a form unrelated to the D2D communication technology, and can also be selected. Further, it is possible to further transmit the processed data to the upper layer for processing, and similarly, the adaptation layer transmits the data transmitted from the upper layer to the PC5 interface for D2D communication. It can be used for capsuling as a form corresponding to the technology, and the capsulated data can be transmitted to a lower layer, for example, to the bottom layer of layer 2 and to layer 1. This makes it possible for the PC5 interface to support a variety of D2D communication technologies.

Optionally, the adaptation layer can be located above the bottom layer of layer 2, where the bottom layer of layer 2 can accommodate the D2D communication technology used for the PC5 interface. is there. Specifically, in FIG. 2a, the ADP layer is located between the bottom layer of layer 2 and the RLC layer, and selectively, the ADP layer is located between the RLC layer and PDCP or at another position of layer 2. The embodiments of the present invention, which can also be located in, are not limited thereto.

FIG. 2b shows an example of another user plane protocol stack of each facility for relay transmission. Here, FIG. 2b and FIG. 2a differ in the following points. In FIG. 2b, the user plane protocol stack of the relay terminal equipment does not include the RLC layer and the PDCP layer, and accordingly, the RLC layer of the D2D terminal equipment and the RLC layer of the network equipment are equal layers to each other, and the D2D terminal. The PDCP layer of the equipment and the PDCP layer of the network equipment are equal to each other. In this case, when the relay terminal equipment relays the data between the D2D terminal equipment and the network equipment, it is not necessary to perform the analysis processing of the data, but the embodiment of the present invention is not limited to this.

It should be noted that the examples of FIGS. 2a and 2b are not intended to limit the scope of the embodiments of the present invention, but to help those skilled in the art better understand the embodiments of the present invention. .. It is self-evident that one of ordinary skill in the art can make various equivalent modifications and modifications based on the examples of FIGS. 2a and 2b, and such modifications or modifications are also within the scope of the embodiments of the present invention. ..

FIG. 3 schematically shows a relay transmission method 200 provided by an embodiment of the present invention. The relay transmission method 200 can be applied to the wireless communication system 100, but the embodiment of the present invention is not limited to this. Specifically, the relay transmission method 200 can be applied to relay transmission of uplink data, that is, D2D terminal equipment (also referred to as remote terminal equipment) is upgraded to network equipment via relay terminal equipment. It can be applied to transmit link data.

In S210, the remote terminal equipment capsulates the data to be transmitted in the adaptation layer of layer 2 to generate an adaptation layer protocol data unit (PDU: Protocol Data Unit).

Optionally, if the adaptation layer is located above the bottom layer of layer 2, the remote terminal equipment can be able to capsulate the data to be transmitted by the adaptation layer, or by the adaptation layer. Prior to the treatment, it is possible to perform the capselling treatment of the RLC layer or sequentially through the capselling treatment of the PDCP layer and the RLC layer, but the examples of the present invention are not limited thereto. When the adaptation layer processes the data to be transmitted by the adaptation layer, the remote terminal equipment can acquire the adaptation layer PDU by adding the identification information of the remote terminal equipment to the data to be transmitted. It is possible to transmit the adaptation layer PDU to the bottom layer of the layer 2 for further capselling processing, but the embodiment of the present invention is not limited to this.

Optionally, the identification information of the remote terminal equipment can include a terminal equipment identifier of the remote terminal equipment. The terminal equipment identifier can only be used to identify the remote terminal equipment. The terminal equipment identifier can be defined in advance, and for example, the terminal equipment identifier may be specifically the equipment identifier of the remote terminal equipment, the user identifier of the remote terminal equipment, and the like. good. Alternatively, the identification information of the remote terminal equipment can include an identifier of the adaptation layer of the remote terminal equipment, that is, an identifier that can be capsulated and analyzed by the adaptation layer. .. The adaptation layer identifier of the remote terminal equipment can be used only to identify the remote terminal equipment during relay transmission. The adaptation layer identifier of the remote terminal equipment can be defined in advance and can be arranged by the network equipment. For example, in the adaptation layer identifier of the remote terminal equipment, the network equipment is the remote terminal equipment. Although it can be assigned for the remote terminal equipment in the process of establishing bearings for, embodiments of the present invention are not limited thereto.

Optionally, the remote terminal equipment can include instruction information for instructing that the data contained in the adaptation layer PDU is relay data, that is, the instruction information is the adaptation layer PDU. It is possible that the data contained in the above is not transmitted to the relay terminal equipment, but is for instructing that the relay terminal equipment needs to be transferred to the network equipment.

Optionally, the instructional information in the adaptation layer PDU can be explicitly or implicitly instructed. The above instruction information can occupy one or more bits.

Optionally, in an embodiment of the invention, it is possible to indicate whether the data contained in the adaptation layer PDU is relay data, depending on whether the adaptation layer PDU includes or does not include the bearing identification region. Correspondingly, when the relay terminal equipment receives the adaptation layer PDU transmitted by the remote terminal equipment, it is possible to determine whether or not the adaptation layer PDU includes the bearing identification area. As one selectable example, when the adaptation layer PDU does not include the bearing identification area, in the relay terminal equipment, the data contained in the adaptation layer PDU is not the relay data, and the remote terminal equipment is the relay terminal equipment itself. It is possible to confirm that it was transmitted. Optionally, when the adaptation layer PDU includes a bearing identification area, the relay terminal equipment can determine that the data contained in the adaptation layer PDU is relay data and needs to be transferred to the network equipment. , Examples of the present invention are not limited to this.

Optionally, in the embodiment of the present invention, the relay terminal equipment determines whether or not the data contained in the adaptation layer PDU is relay data by identifying the bearing identification information in the bearing identification region of the adaptation layer PDU. It is possible to confirm. For example, it is possible to predefine or set the range of relay bearing identifiers for bearings for relay transmission. In this case, if the relay terminal equipment selectively determines that the bearing identification information included in the received adaptation layer PDU belongs to the relay bearing identifier range, the data included in the adaptation layer PDU is relay data. It is possible to confirm that. Optionally, when the relay terminal equipment determines that the received bearing identification information included in the adaptation layer PDU does not belong to the relay bearing identifier range, it determines that the data contained in the adaptation layer PDU is not relay data. However, the examples of the present invention are not limited to this.

Optionally, the adaptation layer PDU can further include bearing identification information of the bearing to which the data to be transmitted belongs, wherein the bearing identification information includes a bearing identifier or a logical channel identifier. Is possible, and the examples of the present invention are not limited thereto.

In S220, the remote terminal equipment transmits the adaptation layer PDU to the relay terminal equipment.

Optionally, the remote terminal equipment can further process the adaptation layer PDU via layer 1 and also process the relay terminal equipment to the relay terminal equipment via a PC5 interface with the relay terminal equipment. It is possible to transmit later adaptation layer PDUs, but the embodiments of the present invention are not limited to this.

When the network side selectively arranges transmission resources such as time frequency resources, code area resources and / or spatial area resources for relaying data to the remote terminal equipment, the remote terminal equipment relays and transmits. It is possible to transmit the adaptation layer PDU to the relay terminal equipment via the transmission resource for. In this case, the relay terminal facility can determine that the data included in the adaptation layer PDU is the relay data based on the transmission resource occupied by the adaptation layer PDU. Optionally, the remote terminal facility can indicate via other methods that the data contained in the adaptation layer PDU is relay data, whereas the embodiments of the present invention are opposed to this. Not limited.

In S230, the relay terminal equipment receives the adaptation layer PDU transmitted by the remote terminal equipment, acquires the identification information of the remote terminal equipment included in the adaptation layer PDU in the adaptation layer, and also acquires the remote terminal equipment in S240. The data contained in the adaptation layer PDU is transferred to the network equipment based on the identification information of the terminal equipment.

The relay terminal equipment can analyze the identification information of the remote terminal equipment included in the acquired adaptation layer PDU in the adaptation layer, and selectively, the user plane corresponding to the PC5 interface of the relay terminal equipment. When the protocol stack further includes an RLC layer and a PDCP layer, the relay terminal facility can also transmit the adaptation layer PDU to the RLC layer and the PDCP layer for further analysis.

Specifically, the relay terminal equipment is the adaptation layer, and identifies the identification information of the remote terminal equipment included in the received adaptation layer PDU, for example, the adaptation layer identifier of the remote terminal equipment, and identifies the identification information of the remote terminal equipment. It is possible to determine the remote terminal equipment corresponding to the PDU. Based on the acquired identification information of the remote terminal equipment, the relay terminal equipment can perform capselling processing on the data included in the adaptation layer PDU to acquire a data packet corresponding to the Uu interface. Specifically, the data packet can be a layer 1 data frame or a layer 2 PDU, and the data packet can be transmitted to a network facility via a Uu interface.

In the embodiment of the present invention, the layer 1 data frame can indicate that the data is capsulated only by layer 1 without going through further layer 1 capsulation processing. The layer 2PDU can indicate that the outermost or highest layer of data is encapsulated in layer 2 of the equipment. Optionally, in the user plane protocol stack corresponding to the Uu interface, layer 2 can include a MAC layer, an RLC layer and a PDCP layer. Correspondingly, the layer 2 PDU can specifically refer to a MAC PDU, RLC PDU or PDCP PDU. Here, the MAC PDU may be obtained by capsulating data only by the MAC layer in the layer 2 without performing the capselling treatment in the RLC layer and the PDCP layer, and the RLC PDU may be obtained by capsulating the PDCP. It is possible to obtain the data by sequentially capsulating the data by the RLC layer and the MAC layer in the layer 2 without processing, and the PDCP PDU is the data by the PDCP layer, the RLC layer and the MAC layer sequentially in the layer 2. Can be obtained by capsulation processing, and examples of the present invention are not limited thereto.

Optionally, the data packet can include a terminal equipment identifier of the remote terminal equipment, for example, the relay terminal equipment is a correspondence between a pre-stored terminal equipment identifier and an adaptation layer identifier. Based on the relationship, it is possible to determine the terminal equipment identifier corresponding to the adaptation layer identifier included in the adaptation layer PDU, and the data packet includes the determined terminal equipment identifier, but the embodiment of the present invention. Is not limited to this.

Optionally, the data packet may further include bearing identification information of the bearing to which the data to be transmitted belongs, but the embodiments of the present invention are not limited thereto.

Optionally, the relay terminal equipment may further transmit an uplink grant request before the relay terminal equipment transmits the data packet to the network equipment, and the uplink assigned by the network equipment. It is possible to transmit the data packet to the network equipment using the transmission resource.

As one selectable embodiment, the relay terminal equipment can send a scheduling request to the network equipment, the scheduling request so that the network equipment allocates uplink transmission resources to the relay terminal equipment. The network equipment is for making a request, and after receiving the scheduling request, the network equipment can transmit an uplink grant to the relay terminal equipment based on the scheduling request. The link grant is for the network equipment to indicate the uplink transmission resource allocated for the relay terminal equipment, and the relay terminal equipment receives the uplink grant and then performs the uplink transmission. It is possible to use resources to send the data packets to the network equipment.

As another selectable embodiment, the relay terminal equipment can first determine the preamble allocated by the network equipment for the remote terminal equipment, for example, the relay terminal equipment. Based on the correspondence between the adaptation layer identifier or the terminal equipment identifier and the preamble, it is possible to determine the preamble corresponding to the identification information of the remote terminal equipment included in the adaptation layer PDU. After that, the relay terminal equipment can transmit the preamble to the network equipment and start the uplink grant request process. After receiving the preamble transmitted by the relay terminal equipment, the network equipment can transmit an uplink grant to the relay terminal equipment based on the preamble, and the relay terminal equipment can transmit the uplink grant to the relay terminal equipment. After receiving the data packet transmitted using the uplink transmission resource instructed by Grant, the remote terminal equipment corresponding to the data packet is determined based on the uplink transmission resource occupied by the data packet. In this case, selectively, the data packet does not include the terminal equipment identifier of the remote terminal equipment, so that the signaling overhead can be further saved.

As another selectable embodiment, the relay terminal equipment can transmit a buffer status report (BSR: Buffer Status Report) to the network equipment to transmit an uplink grant request. The BSR can include the terminal equipment identifier of the remote terminal equipment. After receiving the BSR, the network equipment can transmit a physical downlink control channel (PDCCH: Physical Downlink Control Channel) to the relay terminal equipment to schedule uplink data transmission of the remote terminal equipment. Is. After receiving the PDCCH, the relay terminal equipment can transmit the data packet to the network equipment based on the PDCCH. After receiving the data packet transmitted by the relay terminal equipment, the network equipment can determine the remote terminal equipment corresponding to the data packet based on the PDCCH for scheduling the data packet. At this time, selectively, the data packet does not have to include the terminal equipment identifier of the remote terminal equipment, but the embodiment of the present invention is not limited to this.

Therefore, in the relay transmission method according to the embodiment of the present invention, the remote terminal equipment transmits the adaptation layer PDU to the relay terminal equipment, the adaptation layer PDU includes the identification information of the remote terminal equipment, and the relay terminal equipment is The adaptation layer can identify the identification information of the remote terminal equipment included in the adaptation layer PDU, and the data included in the adaptation layer PDU is transferred based on the identification information of the remote terminal equipment. Compared to the method in which the relay terminal equipment uses layer 3 relay in the prior art, the processing complexity of the relay terminal equipment can be reduced, the transmission delay of the relay data can be reduced, and the overall performance of the system can be improved. It is possible.

FIG. 4 schematically shows a relay transmission method 300 provided by another embodiment of the present invention. The relay transmission method 300 can be applied to relay transmission of downlink data, that is, the network equipment transmits downlink data to the remote terminal equipment via the relay terminal equipment.

In S310, the network equipment capsulates the data to be transmitted to generate a data packet, wherein the data packet is specifically a layer 1 data frame or a layer 2 PDU corresponding to the Uu interface. You may.

Optionally, the layer 2 PDU can be specifically a MAC PDU, RLC PDU or PDCP PDU, and the embodiments of the present invention are not limited thereto.

Optionally, the data packet can include a terminal equipment identifier of the remote terminal equipment.

Optionally, the data packet can include a relay specific logical channel identifier (LCID: Logical Channel Identifier), and the relay specific LCID indicates that the data contained in the data packet is relay data. It can be used for this purpose and needs to be transferred to the above relay terminal equipment. Optionally, the relay specific LCID can be preset and can also be pre-assigned by the network equipment, eg, the network equipment is in the process of establishing bearings for the remote terminal equipment. Although it is possible to assign the relay specific LCID, the embodiment of the present invention is not limited to this.

Optionally, the network facility can schedule the data packets via a PDCCH scrambled by a Radio Network Temporary Identity (RNTI). The relay specific RNTI can be preset or allocated by the network equipment for the remote terminal equipment, eg, the network equipment is a bearing for the remote terminal equipment. In the process of establishing, it can be assigned for the remote terminal equipment, and the embodiments of the present invention are not limited thereto.

In S320, the network equipment transmits the above data packet to the relay terminal equipment via the Uu interface.

In S330, the relay terminal equipment receives the data packet transmitted by the network equipment, capsulates the data contained in the data packet in the adaptation layer, and acquires the adaptation layer PDU, where the adaptation layer PDU is , Includes identification information for the remote terminal equipment.

The relay terminal equipment can analyze and process the data packet to determine the remote terminal equipment corresponding to the data packet. Optionally, when the data packet includes the terminal equipment identifier of the remote terminal equipment, the relay terminal equipment corresponds to the data packet based on the terminal equipment identifier of the remote terminal equipment included in the data packet. It is possible to determine the remote terminal equipment, but the embodiments of the present invention are not limited to this.

The relay terminal equipment can acquire the adaptation layer PDU by capsulating the data included in the data packet by the adaptation layer. Optionally, the adaptation layer PDU can be obtained by the relay terminal equipment being capsulated only by the adaptation layer sum bottom layer in layer 2, and the PDCP can be obtained before the adaptation process of the adaptation layer. It can be obtained through a layer and RLC layer capselling process. After the adaptation process of the adaptation layer, the relay terminal equipment can transmit data to the bottom layer to further perform the capselling process, but the embodiment of the present invention is not limited to this.

Optionally, the identification information of the remote terminal equipment can include the terminal equipment identifier of the remote terminal equipment, or the identification information of the remote terminal equipment includes the adaptation layer identifier of the remote terminal equipment. However, the examples of the present invention are not limited to this.

Optionally, the adaptation layer PDU can further include bearing identification information of the remote terminal equipment, and the embodiments of the present invention are not limited thereto.

Optionally, the adaptation layer PDU can further include identification information of the relay terminal equipment, but the embodiments of the present invention are not limited thereto.

Optionally, prior to generating the adaptation layer PDU, the relay terminal facility can also determine that the data contained in the data packet is relay data and needs to be transferred. Specifically, when the data packet includes the relay specific LCID, the relay terminal equipment can determine that it is necessary to transfer the data included in the data packet based on the relay specific LCID. .. Alternatively, when the data packet is scheduled by the PDCCH scrambled by the relay specific RNTI, the relay terminal equipment transfers the data contained in the data packet based on the PDCCH for scheduling the data packet. It is also possible to determine what needs to be done. Alternatively, the relay terminal equipment can determine that the data included in the data packet is relay data via another method, whereas the embodiment of the present invention is different from this. Not limited.

In S340, the relay terminal equipment transmits the adaptation layer PDU to the remote terminal equipment.

Optionally, the relay terminal facility can transmit the adaptation layer PDU via a transmission resource for relay transmission, but the embodiments of the present invention are not limited thereto.

In S350, the remote terminal equipment receives the adaptation layer PDU transmitted by the relay terminal equipment, acquires the identification information of the remote terminal equipment included in the adaptation layer PDU at the adaptation layer, and the adaptation layer PDU becomes itself. Confirm whether it was sent.

Optionally, when the identification information contained in the adaptation layer PDU is matched with the identifier of the remote terminal equipment, the remote terminal equipment determines that the adaptation layer PDU is transmitted to itself. It is also possible to demodulate the data contained in the adaptation layer PDU. Optionally, if the identification information contained in the adaptation layer PDU is not matched with the identifier of the remote terminal equipment, the remote terminal equipment can determine that the adaptation layer PDU was not transmitted to itself. It is also possible to discard the adaptation layer PDU, but the examples of the present invention are not limited to this.

Therefore, in the relay transmission method according to the embodiment of the present invention, the relay terminal equipment receives the data packet transmitted by the network equipment, and then performs the data included in the data packet in the adaptation layer to perform the adaptation processing to obtain the adaptation layer PDU. It is possible to acquire, where the adaptation layer PDU contains identification information of the remote terminal equipment, transmits the adaptation layer PDU to the remote terminal equipment, and the remote terminal equipment receives the adaptation received by the adaptation layer. By analyzing the identification information of the remote terminal equipment included in the layer PDU, it is determined whether or not the adaptation layer PDU is transmitted to itself, and the relay terminal equipment uses the layer 3 relay in the prior art. In comparison, it is possible to reduce the processing complexity of the relay terminal equipment, reduce the transmission delay of the relay data, and improve the overall performance of the system.

The magnitude of the number of each process does not mean before and after the execution order, and the execution order of each process is determined by its function and internal logic, and the embodiment of the present invention is carried out. It should be understood that no limitation should be constructed for the process.

The relay transmission method according to the embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4, and the relay transmission device according to the embodiment of the present invention will be described in detail with reference to FIGS. 5 to 10 below. To do.

FIG. 5 shows a relay transmission device 400 provided by an embodiment of the present invention. The relay transmission device 400 includes a reception unit 410, a processing unit 420, and a transmission unit 430 that are sequentially coupled.

In one selectable embodiment, the relay transmission device 400 can be applied to relay transmission of uplink data.

The receiving unit 410 can be configured to transmit the adaptation layer PDU transmitted by the remote terminal equipment to the network equipment, wherein the adaptation layer PDU includes the identification information of the remote terminal equipment. The adaptation layer PDU is acquired by the remote terminal equipment by the adaptation layer of the layer 2 by capsulating the data included in the adaptation layer PDU.

The processing unit 420 is the adaptation layer of the layer 2, and can be configured to acquire the identification information of the remote terminal equipment included in the adaptation layer PDU received by the receiving unit 410.

The transmission unit 430 can be configured to transfer the data contained in the adaptation layer PDU to the network equipment based on the identification information of the remote terminal equipment acquired by the processing unit 420.

Optionally, the identification information of the remote terminal equipment includes an adaptation layer identifier of the remote terminal equipment or a terminal equipment identifier of the remote terminal equipment.

Optionally, the processing unit 420 also generates a layer 2PDU corresponding to the second interface based on the identification information of the remote terminal equipment, wherein the second interface is the relay transmission device 400. It is configured to be a communication interface between and the above network equipment.
Correspondingly, the transmission unit 430 is specifically configured to transmit the layer 2PDU corresponding to the second interface generated by the processing unit 420 to the network equipment.

Optionally, the header portion of the adaptation layer PDU can include instruction information, and the instruction information is for indicating that the data included in the adaptation layer PDU is relay data. At this time, the processing unit 420 transfers the data included in the adaptation layer PDU to the network equipment based on the identification information of the remote terminal equipment acquired by the transmission unit 430, before transferring the data included in the adaptation layer PDU to the network equipment. Based on the instruction information contained in the above, it is further configured to determine that the data contained in the adaptation layer PDU needs to be transferred to the network equipment.

In one other selectable embodiment, the relay transmission device 400 can be applied to relay transmission of downlink data.

The receiving unit 410 can be configured to receive data packets transmitted by the network equipment to the remote terminal equipment.

Optionally, the data packet can be specifically a layer 1 data frame or a layer 2 PDU.

The processing unit 420 can be configured to acquire the adaptation layer PDU by capsulating the data included in the data packet received by the receiving unit 410 in the adaptation layer of the layer 2. The adaptation layer PDU includes the identification information of the remote terminal equipment.

The transmission unit 430 can be configured to transmit the adaptation layer PDU acquired by the processing unit 420 to the remote terminal equipment.

Alternatively, the receiving unit 410 can be specifically configured to receive the layer 2PDU corresponding to the second interface that the network equipment transmits to the remote terminal equipment, and the second The layer 2PDU corresponding to the interface includes the above data, where the second interface is a communication interface between the relay transmission device and the network equipment.

Optionally, the data packet includes a relay specific logical channel identifier, at which time the processing unit 420 capsulates the data contained in the data packet at the adaptation layer of layer 2 to acquire the adaptation layer PDU. It can be further configured to determine that the data contained in the data packet needs to be transferred based on the relay specific logical channel identifier.

Optionally, the data packet is scheduled by a PDCCH in which the network equipment is scrambled by a relay specific radio network temporary identifier (RNTI). At this time, the processing unit 420 is a relay used for PDCCH for scheduling the data packet before the data contained in the data packet is capsularized in the adaptation layer of layer 2 to acquire the adaptation layer PDU. It can be further configured to determine that the data contained in the data packet needs to be transferred based on the particular RNTI.

In the embodiment of the present invention, the communication interface between the relay transmission device 400 and the remote terminal equipment can be the first interface.

Optionally, in the user plane protocol stack corresponding to the first interface of the relay transmission device 400, layer 2 can include only the bottom layer and the adaptation layer located above the bottom layer, or In the user plane protocol stack corresponding to the first interface of the relay transmission device 400, the layer 2 can include a bottom layer, an adaptation layer, an RLC layer and a PDCP layer, where the adaptation layer. Is located between the RLC layer and the bottom layer.

Optionally, in the user plane protocol stack corresponding to the first interface, the layer located below the adaptation layer corresponds to the D2D communication technology used between the relay transmission device and the remote terminal equipment. Is possible.

Specifically, the layer located below the adaptation layer can include the bottom layers of layer 1 and layer 2.

In one selectable example, the relay transmission device 400 can specifically be the relay terminal equipment in the above embodiment, and the relay transmission device 400 corresponds to the relay terminal equipment in the embodiment of the above method. It can be configured to perform each process and / or step to be performed and will not be repeated here to avoid duplication.

FIG. 6 shows a relay transmission device 500 provided by an embodiment of the present invention. The relay transmission device 500 can be applied to relay transmission of uplink data. The relay transmission device 500
The adaptation layer of layer 2 is configured to capsulate the data transmitted to the network equipment to acquire the adaptation layer PDU, wherein the adaptation layer PDU includes a processing unit including identification information of the relay transmission device. 510 and
It includes a transmission unit 520 configured to transmit the adaptation layer PDU generated by the processing unit to the relay terminal equipment.

Optionally, the identification information of the relay transmission device 500 includes an adaptation layer identifier of the relay transmission device 500 or a terminal equipment identifier of the relay transmission device 500.

The communication interface between the relay terminal equipment and the relay transmission device 500 can be specifically a first interface.

Optionally, in the user plane protocol stack corresponding to the first interface of the relay terminal equipment, layer 2 includes only the bottom layer and the adaptation layer located above the bottom layer, or of the relay terminal equipment. In the user plane protocol stack corresponding to the first interface, layer 2 includes a bottom layer, the adaptation layer, an RLC layer and a PDCP layer, wherein the adaptation layer is between the RLC layer and the bottom layer. To position.

Optionally, in the user plane protocol stack corresponding to the first interface, the layers below the adaptation layer correspond to the D2D communication technology used between the relay terminal equipment and the relay transmission device 500. ..

Optionally, the header portion of the adaptation layer PDU includes instruction information, and the instruction information is for indicating that the data contained in the adaptation layer PDU is relay data.

Optionally, the adaptation layer PDU further includes bearing identification information for the bearing to which the data belongs.

In one selectable example, the relay transmission device 500 can specifically be the remote terminal equipment in the above embodiment, and the relay transmission device 500 is the remote terminal equipment in the embodiment of the above method. It can be configured to perform each corresponding process and / or step and will not be repeated here to avoid duplication.

FIG. 7 shows a relay transmission device 600 provided by an embodiment of the present invention. The relay transmission device 600 can be applied to relay transmission of downlink data. The relay transmission device 600
It is configured to receive the adaptation layer PDU transmitted by the relay terminal equipment, wherein the adaptation layer PDU includes a receiving unit 610 including identification information of the relay transmission device 600 and a receiving unit 610.
In the adaptation layer of layer 2, the identification information of the relay transmission device 600 included in the adaptation layer PDU received by the reception unit 610 is acquired, and based on the acquired identification information of the relay transmission device 600, the adaptation is performed. It includes a processing unit 620 configured to determine the remote terminal equipment corresponding to the layered PDU.

Optionally, the identification information of the relay transmission device 600 includes an adaptation layer identifier of the relay transmission device 600 or a terminal equipment identifier of the relay transmission device 600.

The communication interface between the relay terminal equipment and the relay transmission device 600 is the first interface.

Optionally, in the user plane protocol stack corresponding to the first interface of the relay terminal equipment, layer 2 includes only the bottom layer and the adaptation layer located above the bottom layer, or of the relay terminal equipment. In the user plane protocol stack corresponding to the first interface, layer 2 includes a bottom layer, the adaptation layer, an RLC layer and a PDCP layer, where the adaptation layer is located between the RLC layer and the bottom layer. To do.

Optionally, in the user plane protocol stack corresponding to the first interface, the layers below the adaptation layer correspond to the D2D communication technology used between the relay terminal equipment and the remote terminal equipment. ..

In one selectable example, the relay transmission device 600 can specifically be the remote terminal equipment in the above embodiment and corresponds to the relay transmission device 600 in the embodiment of the above method. It can be used to perform each process and / or step and will not be repeated here to avoid duplication.

FIG. 8 shows a relay transmission device 700 provided by an embodiment of the present invention. The relay transmission device 700 includes a receiver 710, a processor 720, and a transmitter 730 that are sequentially coupled.

In one selectable embodiment, the relay transmission device 700 can be applied to relay transmission of uplink data.

The receiver 710 can be configured to receive the adaptation layer PDU transmitted by the remote terminal equipment to the network equipment, wherein the adaptation layer PDU includes the identification information of the remote terminal equipment. Further, the adaptation layer PDU is obtained by the remote terminal equipment in the adaptation layer of layer 2 by capsulating the data contained in the adaptation layer PDU.

The processor 720 is an adaptation layer of layer 2, and can be configured to acquire identification information of the remote terminal equipment included in the adaptation layer PDU received by the receiver 710.

The transmitter 730 can be configured to transfer the data contained in the adaptation layer PDU to the network equipment based on the identification information of the remote terminal equipment acquired by the processor 720.

Optionally, the identification information of the remote terminal equipment includes an adaptation layer identifier of the remote terminal equipment or a terminal equipment identifier of the remote terminal equipment.

Optionally, the processor 720 can be further configured to generate a layer 2PDU corresponding to the second interface based on the identification information of the remote terminal equipment, where the second. The interface is a communication interface between the relay transmission device 700 and the network equipment.

Correspondingly, the transmitter 730 is specifically configured to transmit the layer 2PDU corresponding to the second interface generated by the processor 720 to the network equipment.

Optionally, the header portion of the adaptation layer PDU includes instruction information, and the instruction information is for indicating that it is data relay data included in the adaptation layer PDU. At this time, the processor 720 transfers the data included in the adaptation layer PDU to the network equipment based on the identification information of the remote terminal equipment acquired by the transmitter 730, and then transfers the data included in the adaptation layer PDU to the adaptation layer PDU. It can also be further configured to determine that the data contained in the adaptation layer PDU needs to be transferred to the network equipment based on the included instructional information.

In one other selectable embodiment, the relay transmission device 700 can be applied to relay transmission of downlink data.

The receiver 710 can be configured to receive data packets transmitted by the network equipment to the remote terminal equipment.

Optionally, the data packet can be specifically a layer 1 data frame or a layer 2 PDU.

The processor 720 can be configured to acquire the adaptation layer PDU by capsulating the data contained in the data packet received by the receiver 710 in the adaptation layer of the layer 2. The adaptation layer PDU includes the identification information of the remote terminal equipment.

The transmitter 730 can be configured to transmit the adaptation layer PDU acquired by the processor 720 to the remote terminal equipment.

Optionally, the receiver 710 can be specifically configured to receive the layer 2PDU corresponding to the second interface that the network equipment transmits to the remote terminal equipment, the second interface. The layer 2PDU corresponding to the above includes the above data, and here, the second interface is a communication interface between the relay transmission device and the network equipment.

Optionally, the data packet includes a relay specific logical channel identifier, at which time the processor 720 capsulates the data contained in the data packet at the adaptation layer of layer 2 to acquire the adaptation layer PDU. Previously, it may be further configured to determine that the data contained in the data packet needs to be transferred based on the relay specific logical channel identifier.

Optionally, the data packet is scheduled by a PDCCH in which the network equipment is scrambled by a relay specific radio network temporary identifier (RNTI). At this time, the processor 720 is a relay used in the PDCCH for scheduling the data packet before acquiring the adaptation layer PDU by capsulating the data contained in the data packet in the adaptation layer of the layer 2. It can be further configured to determine that the data contained in the data packet needs to be transferred based on the particular RNTI.

In the embodiment of the present invention, the communication interface between the relay transmission device 700 and the remote terminal equipment can be the first interface.

Optionally, in the user plane protocol stack corresponding to the first interface of the relay transmission device 700, layer 2 can include only the bottom layer and the adaptation layer located above the bottom layer, or In the user plane protocol stack corresponding to the first interface of the relay transmission device 700, the layer 2 can include a bottom layer, an adaptation layer, an RLC layer and a PDCP layer, where the adaptation layer. Is located between the RLC layer and the bottom layer.

Optionally, in the user plane protocol stack corresponding to the first interface, the layer located below the adaptation layer corresponds to the D2D communication technology used between the relay transmission device and the remote terminal equipment. Is possible.

Specifically, the layer located below the adaptation layer can include the bottom layers of layer 1 and layer 2.

Specifically, the relay transmission device 700 can be the relay terminal equipment according to the above embodiment, and executes each step and / or process corresponding to the relay terminal equipment according to the embodiment of the above method. It should be understood that it is composed of. Optionally, the relay transmission device 700 can include a memory, which includes a read-only memory and a random access memory, and is capable of providing instructions and data to the processor. Part of the memory can include non-volatile random access memory. For example, the memory can store equipment type information. The processor can be configured to execute the instructions stored in the memory, and if the processor executes the instructions stored in the memory, the processor will perform each of the embodiments of the above method. It is configured to perform steps and / or processes.

FIG. 9 shows a relay transmission device 800 provided by an embodiment of the present invention. The relay transmission device 800 can be applied to relay transmission of uplink data. The relay transmission device 800
The adaptation layer of layer 2 is configured to capsulate the data to be transmitted to the network equipment to acquire the adaptation layer PDU, where the adaptation layer PDU obtains the identification information of the relay transmission device 800. Including processor 810 and
The relay terminal equipment includes a transmitter 820 configured to transmit the adaptation layer PDU generated by the transmitter 820.

Optionally, the identification information of the relay transmission device 800 includes an adaptation layer identifier of the relay transmission device 800 or a terminal equipment identifier of the relay transmission device 800.

The communication interface between the relay terminal equipment and the relay transmission device 800 can be specifically a first interface.

Optionally, in the user plane protocol stack corresponding to the first interface of the relay terminal equipment, layer 2 includes only the bottom layer and the adaptation layer located above the bottom layer, or of the relay terminal equipment. In the user plane protocol stack corresponding to the first interface, layer 2 includes a bottom layer, the adaptation layer, an RLC layer and a PDCP layer, wherein the adaptation layer is between the RLC layer and the bottom layer. To position.

Optionally, in the user plane protocol stack corresponding to the first interface, the layers below the adaptation layer correspond to the D2D communication technology used between the relay terminal equipment and the relay transmission device 800. ..

Optionally, the header portion of the adaptation layer PDU includes instruction information, and the instruction information is for indicating that the data contained in the adaptation layer PDU is relay data.

Optionally, the adaptation layer PDU further includes bearing identification information for the bearing to which the data belongs.

The relay transmission device 800 can specifically be the remote terminal equipment according to the above embodiment, and may execute each step and / or process corresponding to the remote terminal equipment according to the embodiment of the above method. It should be understood that it is composed of. Optionally, the relay transmission device 800 can include a memory, which memory can include a read-only memory and a random access memory, and also provides instructions and data to the processor. Part of the memory can include non-volatile random access memory. For example, the memory can store equipment type information. The processor can be configured to execute the instructions stored in the memory, and if the processor executes the instructions stored in the memory, the processor will perform each of the embodiments of the above method. It is configured to perform steps and / or processes.

FIG. 10 shows a relay transmission device 900 provided by an embodiment of the present invention. The relay transmission device 900 can be applied to relay transmission of downlink data. The relay transmission device 900 is
It is configured to receive the adaptation layer PDU transmitted by the relay terminal equipment, wherein the adaptation layer PDU includes a receiver 910 including identification information of the relay transmission device 900 and a receiver 910.
The adaptation layer of the layer 2 acquires the identification information of the relay transmission device 600 included in the adaptation layer PDU received by the receiver 910, and based on the acquired identification information of the relay transmission device 900, the adaptation. It includes a processor 920 for determining the remote terminal equipment corresponding to the layer PDU.

Optionally, the identification information of the relay transmission device 900 includes an adaptation layer identifier of the relay transmission device 900 or a terminal equipment identifier of the relay transmission device 900.

The communication interface between the relay terminal equipment and the relay transmission device 900 is the first interface.

Optionally, in the user plane protocol stack corresponding to the first interface of the relay terminal equipment, layer 2 includes only the bottom layer and the adaptation layer located above the bottom layer, or of the relay terminal equipment. In the user plane protocol stack corresponding to the first interface, layer 2 includes a bottom layer, the adaptation layer, an RLC layer and a PDCP layer, where the adaptation layer is located between the RLC layer and the bottom layer. To do.

Optionally, in the user plane protocol stack corresponding to the first interface, the layer located below the adaptation layer corresponds to the D2D communication technology used between the relay terminal equipment and the relay transmission device 90. To do.

Specifically, the relay transmission device 900 can be the remote terminal equipment in the above embodiment, and the relay transmission device 900 is each step and / or process corresponding to the relay terminal equipment in the embodiment of the above method. It should be understood that it is used to perform. Optionally, the relay transmission device 900 can include a memory, which memory can include a read-only memory and a random access memory, and also provides instructions and data to the processor. Part of the memory can include non-volatile random access memory. For example, the memory can store equipment type information. The processor can be configured to execute the instructions stored in the memory, and if the processor executes the instructions stored in the memory, the processor will perform each of the embodiments of the above method. It is configured to perform steps and / or processes.

In the embodiment of the present invention, the processor may be a central processing unit (CPU: Central Processing Unit), and the processor may be another general-purpose processor, digital signal processor (DSP), dedicated integrated circuit (ASIC), or the like. It should be understood that it may be a field programmable gate array (FPGA) or other programmable logic device, an individual gate or transistor logic element, an individual hardware component, and the like. The general-purpose processor may be a microprocessor, or the processor may be any general processor or the like.

An embodiment of the present invention provides a wireless communication system capable of including a relay terminal facility, a remote terminal facility and a network facility in any of the above embodiments.

The description of the examples in the text will be emphasized with an emphasis on the differences between the examples, and the same or similar points will not be repeated here for the sake of cross-reference and brevity. That should be understood.

In the process of implementation, each step of the method can be completed by instructions in the form of integrated logic circuits or software in the hardware of the processor. The steps of the method published in conjunction with the embodiments of the present invention can be implemented and performed directly on a hardware processor, or can be performed by a combination of hardware and software modules of the processor. Software modules can be located in mature storage media of the art, such as random memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in memory, and the processor, after executing an instruction in memory, combines with its hardware to complete the steps of the method. To avoid duplication, we won't go into detail here.

To avoid duplication, it should be understood that the description of the examples in the text emphasizes the differences between the examples and that the same or similar points can be cross-referenced.

For those skilled in the art, each method step and unit described in connection with the embodiments disclosed in the text is realized via electronic hardware, computer software, or a combination of both hardware and software. To articulate compatibility, it will be appreciated that the steps and configurations of each embodiment have already been generally described according to function in the above description. Whether these functions are performed in a hardware manner or in a software manner depends on the specific application of the technical solution and the design constraints. Those skilled in the art can realize the above-mentioned functions by different methods for each specific application, but such realization should not go beyond the scope of the present invention.

For convenience and brevity of description, one of ordinary skill in the art can refer to the corresponding process in the embodiment of the above method for the specific operating process of the system, device and unit described above. It should be clearly understood that it will not be explained again here.

It should be understood that in some of the embodiments provided by the present invention, the disclosed systems, devices and methods may be implemented in other ways. For example, the embodiment of the device described above is merely exemplary, for example, the division of the unit is merely a division of a logical function, and may have other classification methods when actually realized. It can, for example, multiple units or components can be combined or integrated into another system, or a feature can be ignored or not implemented. Alternatively, the coupling or direct coupling or communication connection between each other displayed or discussed may be an indirect coupling or communication connection via an interface, device or unit. , Electrical, mechanical or other forms.

The unit described as the component of the separation may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, one place. It may be located in or distributed over multiple network units. Depending on the actual need, some or all of the units may be selected to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of this invention may be integrated in one processing unit, each unit may exist physically separately, or two or more units. May be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a soft-wet function unit.

The integrated unit is realized in the form of a software functional unit and may be stored in one computer-readable storage medium when sold or used as an independent product. Based on this understanding, the parts of the technical solution of the present invention, or the parts that contribute to the prior art or the parts of the above technical solution, may be realized in the form of a product of software. The computer software product can be stored in one storage medium, and one computer equipment (personal computer, server, network equipment, etc.) can perform all or part of the steps of the method of each embodiment of the present invention. Some instructions are stored for execution. The storage medium includes a U disk capable of storing a program code, a portable hard disk, a read-only memory (ROM: Read-Only Memory), a random access memory (RAM: Random Access Memory), a magnetic disk or an optical disk, and the like. Is done.

Although the specific embodiments of the present invention have been described above, the scope of protection of the present invention is not limited to this, and those skilled in the art can easily change the scope of protection within the technical scope presented by the present invention. Or the alternation can be known and should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention must be based on the scope of protection of the claim.

Claims (15)

It is a relay transmission method
The relay terminal equipment receives the adaptation layer protocol data unit (PDU) transmitted by the remote terminal equipment to the network equipment via the first interface, where the adaptation layer PDU receives the identification information of the remote terminal equipment. To include and
The relay terminal equipment acquires the identification information of the remote terminal equipment included in the adaptation layer PDU, and
The relay terminal equipment includes transferring the data contained in the adaptation layer PDU to the network equipment based on the acquired identification information of the remote terminal equipment.
The header portion of the adaptation layer PDU includes instruction information, and the instruction information is for indicating that the data included in the adaptation layer PDU is relay data.
The relay transmission method. The relay transmission method according to claim 1, wherein the identification information of the remote terminal equipment includes an adaptation layer identifier of the remote terminal equipment or a terminal equipment identifier of the remote terminal equipment. In the user plane protocol stack corresponding to the first interface of the relay terminal facility, layer 2 includes only the bottom layer and the adaptation layer located above the bottom layer, or
In the user plane protocol stack corresponding to the first interface of the relay terminal facility, layer 2 includes a bottom layer, the adaptation layer, a wireless link control layer protocol (RLC) layer, and a packet data convergence protocol (PDCP) layer. Here, the adaptation layer is located between the RLC layer and the bottom layer.
The relay transmission method according to claim 1 or 2, wherein the first interface is a communication interface between the relay terminal equipment and the remote terminal equipment. In the user plane protocol stack corresponding to the first interface, the layer located below the adaptation layer corresponds to the communication technology from the equipment used between the relay terminal equipment and the remote terminal equipment (D2D). The relay transmission method according to any one of claims 1 to 3, wherein the relay transmission method is performed. The relay terminal equipment may transfer the data contained in the adaptation layer PDU to the network equipment based on the acquired identification information of the remote terminal equipment.
The relay terminal equipment generates the layer 2PDU corresponding to the second interface based on the identification information of the remote terminal equipment.
The relay transmission method according to any one of claims 1 to 4, wherein the relay terminal equipment includes transmitting the layer 2PDU corresponding to the second interface to the network equipment. Before the relay terminal equipment transfers the data contained in the adaptation layer PDU to the network equipment based on the acquired identification information of the remote terminal equipment, the relay transmission method is performed.
The relay terminal equipment further includes determining that it is necessary to transfer the data contained in the adaptation layer PDU to the network equipment based on the instruction information contained in the adaptation layer PDU. The relay transmission method according to any one of claims 1 to 5. It is a relay transmission method
When the relay terminal equipment receives the data packet transmitted by the network equipment to the remote terminal equipment,
The relay terminal equipment capsulates the data contained in the data packet to acquire an adaptation layer protocol data unit (PDU), wherein the adaptation layer PDU includes identification information of the remote terminal equipment. When,
The relay terminal equipment includes transmitting the adaptation layer PDU to the remote terminal equipment.
The relay transmission method. The relay transmission method according to claim 7, wherein the identification information of the remote terminal equipment includes an adaptation layer identifier of the remote terminal equipment or a terminal equipment identifier of the remote terminal equipment. In the user plane protocol stack corresponding to the first interface of the relay terminal facility, layer 2 includes only the bottom layer and the adaptation layer located above the bottom layer, or
In the user plane protocol stack corresponding to the first interface of the relay terminal facility, layer 2 includes a bottom layer, the adaptation layer, a wireless link control layer protocol (RLC) layer, and a packet data convergence protocol (PDCP) layer. Here, the adaptation layer is located between the RLC layer and the bottom layer.
The relay transmission method according to claim 7 or 8, wherein the first interface is a communication interface between the relay terminal equipment and the remote terminal equipment. In the user plane protocol stack corresponding to the first interface, the layer located below the adaptation layer corresponds to the communication technology from the equipment used between the relay terminal equipment and the remote terminal equipment (D2D). The relay transmission method according to any one of claims 7 to 9, wherein the relay transmission method is performed. The relay terminal equipment receives the data packet transmitted by the network equipment to the remote terminal equipment.
The relay terminal equipment receives the layer 2PDU corresponding to the second interface transmitted by the network equipment to the remote terminal equipment, and the layer 2PDU corresponding to the second interface includes the data. The relay transmission method according to any one of claims 7 to 10, wherein the relay transmission method is characterized. The data packet includes a relay specific logical channel identifier.
Before the relay terminal equipment capsulates the data contained in the data packet in the adaptation layer of layer 2 to acquire the adaptation layer PDU, the relay transmission method is performed.
Any of claims 7 to 11, further comprising determining that the relay terminal facility needs to transfer the data contained in the data packet based on the relay specific logical channel identifier. The relay transmission method according to item 1. The data packet is scheduled by a physical downlink control channel (PDCCH) in which the network equipment is scrambled by a relay specific radio network temporary identifier (RNTI).
Before the relay terminal equipment capsulates the data contained in the data packet in the adaptation layer of layer 2 to acquire the adaptation layer PDU, the relay transmission method is performed.
The relay terminal equipment further comprises determining that the data contained in the data packet needs to be transferred based on the relay specific RNTI used in the PDCCH for scheduling the data packet. The relay transmission method according to any one of claims 7 to 11. It is a relay transmission device
With the processor
Includes memory for storing instructions,
When the instruction is executed by the processor, the processor executes the method according to any one of claims 1 to 6.
The relay transmission device. It is a relay transmission device
With the processor
Includes memory for storing instructions,
When the instruction is executed by the processor, the processor executes the method according to any one of claims 7 to 13.
The relay transmission device.