JP2020171052A - Relay transmission method and device - Google Patents

Abstract

To provide a relay transmission method capable of reducing the complexity and transmission delay of relay transmission.SOLUTION: A relay terminal device confirms receiving a first lower layer data frame transmitted by a transmission side device to a reception side device and that a lower layer needs to transfer the first lower layer data frame, and performs transfer processing. The first lower layer data frame is generated by processing a MAC PDU including identifier information on a far-end terminal device at the transmission side device. Here, the transmission side device is the far-end terminal device and the reception side device is a network device, or the transmission side device is the network device and the reception side device is the far-end terminal device.SELECTED DRAWING: Figure 3

Description

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

Device-to-device (D2D) technology means that adjacent terminal devices transmit data within a short range by a direct link method without the need for transfer by a network device. In D2D communication, it is possible to share the permitted bandwidth resource with the cellular system and form a unified hybrid cellular-D2D network. In the hybrid network, some terminal devices remain unchanged in cellular communication mode, i.e., the network device is capable of communicating with other terminal devices, and some terminal devices are in D2D communication. It is possible to operate in mode, i.e., to carry out direct transmission of data to other terminal devices via a direct link to other terminal devices.

Other than that, D2D relay can assist data transmission between the network device and the terminal device, in which case the D2D communication mode is used between the D2D relay and the D2D terminal, and between the D2D relay and the network device. Now, use the cellular communication mode. D2D relay receives and transmits data using a half-duplex method, and converts modes in the process of reception and transmission.

In the prior art, D2D relay relays data transmission between a D2D terminal and a network device via an Internet Protocol (IP) layer (ie, layer 3), with respect to the received data packet. Layer 1 (that is, physical layer), Layer 2 (Media Access Control (MAC) layer), Radio Link Control (RLC: Radio Link Control) layer, and Packet Data Convergence Protocol (PDCP) layer. ), And the deencapsulation process must be performed sequentially via layer 3, and the encapsulation process of layer 3, layer 2, and layer 1 is sequentially performed to realize data relay and complexity. Is high, and the data processing delay is large.

An embodiment of the present invention provides a relay transmission method and apparatus, and can reduce the complexity and transmission delay of relay transmission.

In a first aspect, a relay transmission method is provided, in which a relay terminal device receives a first lower layer data frame transmitted by a transmitting device to a receiving device, and the relay terminal device is in a lower layer. To determine that the first lower layer data frame needs to be transferred, the relay terminal device performs transfer processing on the first lower layer data frame in the lower layer. The first lower layer data frame is obtained by processing the MAC PDU in which the transmitting device contains the far-end terminal device identifier information in the lower layer, and the transmitting device includes. Is the far-end terminal device and the receiving-side device is a network device, or the transmitting-side device is a network device and the receiving-side device is the far-end terminal device.

Optionally, the relay terminal device can process only the first lower layer data frame received in the lower layer. In this case, the relay terminal device can perform the transfer process on the first lower layer data frame without identifying the far-end terminal device corresponding to the first lower layer data frame.

Optionally, the relay terminal device can transfer the data contained in the first lower layer data frame using the transmission resource for relay transmission.

Optionally, when the transmitting device is a network device, the relay terminal device can broadcast the data contained in the first lower layer data frame.

The relay transmission method provided in the embodiment of the present invention adopts a lower layer relay method by the relay terminal device to relay data between the far-end terminal device and the network device, and here, the far-end terminal device. Alternatively, the network device transmits a lower layer data frame to the relay terminal device, and the relay terminal device determines that the received data frame contains the relay data without identifying the far-end terminal device in the lower layer. If this is the case, the processing complexity of the relay terminal device and the relay data will be higher than in the conventional method in which the relay terminal device adopts layer 3 to perform relay transfer processing for the data frame by the lower layer. The transmission delay can be reduced and the performance of the entire system can be improved.

In the first possible embodiment of the first aspect, when the transmitting device is a network device, the relay terminal device receives a first lower layer data frame transmitted by the transmitting device to the receiving device. The method further comprises addressing the relay terminal device with a relay specific RNTI to determine that the relay terminal device needs to transfer the first lower layer data frame. If the first lower layer data frame is one that the relay terminal device receives by the addressing, it is determined that the relay terminal device needs to transfer the first lower layer data frame. Including to do.

Combining the above possible implementations, in the second possible implementation of the first aspect, the first lower layer data frame is transmitted by the transmitting device using transmission resources for relay transmission. To determine that the relay terminal device needs to transfer the first lower layer data frame, the relay terminal device is occupied by the first lower layer data frame. Includes determining that the first lower layer data frame needs to be transferred based on the transmission resource.

Combining the above possible implementations, in the third possible implementation of the first aspect, the identifier information of the far-end terminal device is the layer 2 identifier of the far-end terminal device or the far-end terminal device. Includes terminal device identifier.

Combining the above possible implementations, in the fourth possible implementation of the first aspect, the lower layer of the network device is specifically the physical layer, and the lower layer of the far-end terminal device is: It corresponds to the D2D communication technology adopted between the far-end terminal device and the relay terminal device.

Combining the above possible implementations, in the fifth possible implementation of the first aspect, the identifier information of the far-end terminal device is bearing in the MAC control element field of the MAC PDU.

Combining the above possible implementations, in the sixth possible implementation of the first aspect, when the transmitting device is the far-end terminal device and the receiving device is the network device. Before the relay terminal device performs transfer processing on the first lower layer data frame in the lower layer, the method is such that the relay terminal device has a PUCCH resource and a data amount or a data amount in the lower layer. The PUCCH resource corresponding to the amount of data contained in the first lower layer data frame is determined based on the correspondence with the interval, and the relay terminal device uses the corresponding PUCCH resource to perform the said. It further includes sending scheduling requests to network devices.

Combining the above possible implementations, in the seventh possible implementation of the first aspect, when the transmitting device is the far-end terminal device and the receiving device is the network device. Before the relay terminal device performs transfer processing on the first lower layer data frame in the lower layer, the method is such that the relay terminal device has a preamble code and a data amount or a data amount in the lower layer. The preamble code corresponding to the amount of data included in the first lower layer data frame is determined based on the correspondence with the interval, and the relay terminal device transmits the corresponding preamble code to the network device. The corresponding preamble code is used by the network device to allocate uplink transmission resources to the relay terminal device.

Combining the above possible implementations, in the eighth possible implementation of the first aspect, the relay terminal device performs transfer processing on the first lower layer data frame in the lower layer. The relay terminal device performs decoding processing on the first lower layer data frame, acquires the data contained in the first lower layer data frame, and the relay terminal device , The data is encoded to obtain a second lower layer data frame, and the relay terminal device transmits the second lower layer data frame.

Combining the above possible implementations, in the ninth possible implementation of the first aspect, the relay terminal device performs transfer processing on the first lower layer data frame in the lower layer. Includes that the relay terminal device directly transmits the first lower layer data frame via the lower layer.

In the second aspect, another relay transmission method is provided, in which the transmitting device generates a MAC PDU, and the transmitting device processes the relay terminal device and the MAC PDU at a lower layer. The MAC PDU includes the identifier information of the far-end terminal device, and the transmitting device is the far-end terminal device, including transmitting the first lower layer data frame obtained in the above. Alternatively, the transmitting device is a network device.

In the first possible embodiment of the second aspect, if the transmitting device is a network device, the method before the transmitting device transmits the first lower layer data frame to the relay terminal device. The network device further comprises transmitting a physical downlink control channel (PDCCH) to the relay terminal device, wherein the PDCCH is used to schedule the first lower layer data frame. Moreover, the PDCCH is scrambled using the relay specific RNTI.

Combining the above possible implementations, in the second possible implementation of the second aspect, the transmitting side transmitting the first lower layer data frame to the relay terminal device is the transmitting side. The device includes transmitting the first lower layer data frame to the relay terminal device using a transmission resource for relay transmission.

Combining the above possible implementations, in the third possible implementation of the second aspect, the identifier information of the far-end terminal device is the layer 2 identifier of the far-end terminal device or the far-end terminal device. Includes terminal device identifier.

Combining the above possible implementations, in the fourth possible implementation of the second aspect, the lower layer of the network device is specifically the physical layer, and the lower layer of the far-end terminal device is: It corresponds to the D2D communication technology adopted between the far-end terminal device and the relay terminal device.

Combining the above possible implementations, in the fifth possible implementation of the second aspect, the identifier information of the far-end terminal device is bearing in the MAC control element field of the MAC PDU.

In a third aspect, another relay transmission method is provided, in which the receiving device receives a second lower layer data frame transmitted by the relay terminal device, and the receiving device is an upper layer. The second lower layer data frame includes determining that the second lower layer data frame corresponds to the far end terminal device based on the identifier information of the far end terminal device. The frame is obtained by processing the MAC PDU containing the identifier information of the far-end terminal device in the lower layer, and the receiving device is a network device, or the receiving device is the far-end terminal device. Is.

Here, optionally, the upper layer is specifically a layer higher than the lower layer in the user plane protocol stack, for example, a MAC layer, an RLC layer, a PDCP layer, and the like in layer 2.

In the first possible embodiment of the third aspect, the receiving device receives a second lower layer data frame transmitted by the relay terminal device, the receiving device is a relay terminal device. The method comprises receiving a second lower layer data frame transmitted using transmission resources for relay transmission, wherein the receiving device is occupied by the second lower layer data frame. It further includes determining that the second lower layer data frame is to be transferred by the relay terminal device based on the transmission resource.

Combining the above possible implementations, in the second possible implementation of the third aspect, the method is such that if the receiving device is the network device, the network device is the far-end terminal device. Further determining the data transmission tunneling corresponding to, and transmitting the data contained in the second lower layer data frame to the core network device via the corresponding data transmission tunneling. Including.

Combining the above possible implementations, in the third possible implementation of the third aspect, the identifier information of the far-end terminal device is the layer 2 identifier of the far-end terminal device or the far-end terminal device. Includes terminal device identifier.

Combining the above possible implementations, in the fourth possible implementation of the third aspect, the lower layer of the network device is specifically the physical layer, and the lower layer of the far-end terminal device is: It corresponds to the D2D communication technology adopted between the far-end terminal device and the relay terminal device.

Combining the above possible implementations, in the fifth possible implementation of the third aspect, the identifier information of the far-end terminal device is bearing in the MAC control element field of the MAC PDU.

Combining the above possible implementations, in the sixth possible implementation of the third aspect, if the receiving device is a network device, the receiving device is transmitted by the relay terminal device. Prior to receiving the lower layer data frame of, the method is that the network device receives a scheduling request transmitted by the relay terminal device and that the network device has a PUCCH resource and a data volume or data volume interval. The data amount or data amount interval corresponding to the PUCCH resource occupied by the scheduling request is determined based on the correspondence with the above, and the network device is based on the corresponding data amount or data amount interval. Further including allocating uplink transmission resources to the relay terminal device.

Combining the above possible implementations, in the seventh possible implementation of the third aspect, if the receiving device is a network device, the receiving device is transmitted by the relay terminal device. Prior to receiving the lower layer data frame of, the method is that the network device receives the preamble code transmitted by the relay terminal device, and the network device receives the preamble code and the data amount or data amount interval. The data amount or data amount interval corresponding to the received preamble code is determined based on the correspondence with the above, and the network device is the relay terminal based on the corresponding data amount or data amount interval. Further includes allocating uplink transmission resources to the device.

In this way, the network device can allocate an uplink transmission resource based on the PUCCH resource occupied by the received preamble code or scheduling request, and the relay terminal device requests uplink permission. At times, it is not necessary to have a buffer report to indicate the amount of buffer data, thereby eliminating signaling overhead.

In a fourth aspect, a relay transmission device is provided and is configured to implement the method of any possible implementation of the first aspect or the first aspect described above. Specifically, the device includes a unit for carrying out the method of the first aspect or the optional embodiment of the first aspect described above.

In a fifth aspect, another relay transmission device is provided to implement the method of the second aspect or the optional embodiment of the second aspect described above. Specifically, the device includes a unit for carrying out the method of the second aspect or the optional embodiment of the second aspect described above.

In a sixth aspect, another relay transmission device is provided to implement the method of the third aspect or the optional embodiment of the third aspect described above. Specifically, the device includes a unit for carrying out the method of the third aspect or the optional embodiment of the third aspect described above.

In a seventh aspect, another relay transmission device is provided, including a storage unit and a processor, the storage unit is configured to store instructions, and the processor is stored in the storage device. Is configured to execute an instruction, and when the processor executes an instruction stored in the storage device, the execution is an optional embodiment of the first aspect or the first aspect of the processor. Let the method run.

In an eighth aspect, another relay transmission device is provided, including a storage unit and a processor, the storage unit is configured to store instructions, and the processor is stored in the storage device. Is configured to execute an instruction, and when the processor executes an instruction stored in the storage device, the execution is an optional embodiment of a second aspect or a second aspect to the processor. Let the method run.

In a ninth aspect, another relay transmission device is provided, including a storage unit and a processor, the storage unit is configured to store instructions, and the processor is stored in the storage device. Is configured to execute an instruction, and when the processor executes an instruction stored in the storage device, the execution is an optional embodiment of a third aspect or a third aspect to the processor. Let the method run.

In a tenth aspect, a computer-readable medium is provided and configured to store a computer program, the computer program performing the method of the first aspect or any possible implementation of the first aspect. Includes instructions for.

In an eleventh aspect, another computer-readable medium is provided and configured to store a computer program, which computer program is an optional embodiment of the second aspect or the second aspect. Includes instructions to execute the method.

In a twelfth aspect, another computer-readable medium is provided and configured to store a computer program, the computer program being the third or optional embodiment of the third aspect. Includes instructions to execute the method.

In a thirteenth aspect, a relay transmission system is provided, the system including a relay terminal device, a far-end terminal device, and a network device, wherein the user plane protocol stack of the relay terminal device is a lower layer (layer). 1) can be included, and the user plane protocol stack of the far-end terminal device can include Layer 1, Layer 2, and Layer 3, and the user plane of the network device. The protocol stack can include Layer 1, Layer 2, and Layer 3, where layer 1 of the relay terminal device is layer 1 of the far-end terminal device and layer 1 of the network device, respectively. The layer 2 of the far-end terminal device is a peer layer with the layer 2 of the network device.

Optionally, the user plane protocol stack of the relay terminal device can include only layer 1 without including the upper layers (eg, layers 2 and 3). It is not necessary to optionally identify the far-end terminal device corresponding to the data frame to be relayed, and the relay terminal device can perform relay transmission via layer 1. In this case, the network device and the far-end terminal device can identify the far-end terminal device corresponding to the data frame in the upper layer.

Optionally, the relay terminal device may be a device in any possible implementation of the fourth or fourth aspect, and the transmitting device in the far-end terminal device and the network device may be a fifth. The device in the optional embodiment of the sixth aspect or the fifth aspect may be the device, and the receiving device in the far-end terminal device and the network device may be the optional implementation of the sixth aspect or the sixth aspect. It may be a device in a form.

Optionally, the relay terminal device may be the device according to the seventh aspect or any possible embodiment of the seventh aspect, and the far-end terminal device and the transmitting device of the network device may be the eighth aspect. It may be the device in the optional embodiment of the aspect or the eighth aspect, and the receiving device of the far-end terminal device and the network device may be the device in the optional embodiment of the ninth aspect or the ninth aspect. It may be a device.

It is a schematic flowchart of the wireless communication system to which the Example of this invention applies. It is the schematic of the user plane protocol stack for the relay communication of each device of the Example of this invention. It is a schematic flowchart of the relay transmission method provided in the Example of this invention. It is the schematic of the MAC PDU configuration of the relay transmission method provided in the Example of this invention. It is a schematic flowchart of another relay transmission method provided in the Example of this invention. It is a schematic flowchart of another relay transmission method provided in the Example of this invention. It is a schematic block diagram of the relay transmission apparatus provided in the Example of this invention. It is a schematic block diagram of another relay transmission apparatus provided in the Example of this invention. It is a schematic block diagram of another relay transmission apparatus provided in the Example of this invention. It is a schematic block diagram of another relay transmission apparatus provided in the Example of this invention. It is a schematic block diagram of another relay transmission apparatus provided in the Example of this invention. It is a schematic block diagram of another relay transmission apparatus provided in the Example of this invention.

In order to more clearly explain the embodiments of the present invention, the drawings required in the description of the examples or the prior art will be briefly described above, and clearly, the drawings described above are merely the present invention. It is only a few examples of the above, and other drawings can be obtained based on these drawings on the premise that those skilled in the art do not take any creative effort.

In the following, the drawings of the examples of the present invention will be combined to clearly and fully explain the technical proposals of the examples of the present invention, and of course, the described examples are some examples of the present invention. Not all 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.

The terms "system" and "network" can be used interchangeably in the present application. The term "and / or" in the present application merely describes the correspondence of related objects, and three relationships can be expressed. For example, A and / or B can represent a case where only A is present, a case where both A and B are present, and a case where only B is present. Furthermore, the letter "/" in the present application generally represents the relationship of "or" between contextually related objects.

FIG. 1 is a schematic view of a wireless communication system 100 to which an embodiment of the present invention applies, and the wireless communication system 100 includes at least one network device 110. The network device 100 may be a device that communicates with the terminal device. Each network device 100 can provide communication coverage to a specified geographic area and can communicate with terminal devices located within the coverage area. The network device 100 may be a base station (BTS: Base Transfer Station) in a GSM system or a code division multiple access (CDMA) system, and may be a base station (NB: NodeB) in a WCDMA system. It may be an evolutionary base station (eNB or eNodeB: Evolutionary Node B) in an LTE system, or it may be a radio control device in a cloud radio access network (CRAN: Cloud Radio Access Network). Alternatively, the network device may be a relay station, an access point, an in-vehicle device, a wearable device, a core network device in a future 5G network, or a network device in a public mobile phone network (PLMN: Public Land Mobile Network). ..

The wireless communication system 100 further includes a plurality of terminal devices 120 located within the coverage range of the network device 110. The terminal device 120 may be mobile or fixed. The terminal device 120 includes an access terminal, a user device (UE: User Equipment), a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, and a user agent. Alternatively, it may be referred to as a user device. Access terminals include cellular phones, wireless phones, session establishment protocol (SIP) phones, wireless local loop (WLL) stations, personal digital processing (PDAs), and wireless communication functions. It may be a portable device, a computing device or another device connected to a wireless modulation demodulator, an in-vehicle device, a wearable device, and a terminal device in a future 5G network, or a terminal device in a future evolution PLMN.

FIG. 1 illustrates one network device and six terminal devices, and optionally, the wireless communication system 100 can include a plurality of network devices, and coverage of each network device. The scope may include a number of other terminal devices, the embodiments of the present invention do not limit it. In addition, the wireless communication system 100 includes other network entities such as a mobility management entity (MME: Mobile Management Gateway), a serving gateway (SGW: Serving Gateway), and a packet data network gateway (P-GW: Packet Data Network Gateway). Although it can be included, the examples of the present invention are not limited to these.

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

The plurality of terminal devices 120 shown in FIG. 1 include a cellular terminal device, a D2D terminal device, and a relay terminal device, wherein the cellular terminal device employs cellular communication technology and is a network device 110. Communicate with. The D2D terminal device realizes data transmission to and from the network device by the relay terminal device, which is provided with a PC5 interface between the relay terminal device and the D2D terminal device and communicates by adopting the D2D communication technology. Here, the D2D communication technology may be specifically an LTE side link (SL: SideLink) technology, a technology such as WLAN WIFI or Bluetooth, or other D2D communication technology. , Examples of the present invention are not limited thereto. A Uu interface is provided between the relay terminal device and the network device, and communication is performed by adopting cellular communication technology.

In the prior art, the relay terminal device employs a layer 3 relay method to perform relay, data processing is complicated, and processing delay is large. In the embodiment of the present invention, the relay terminal device adopts a lower layer relay method to transmit data between the relay network device and the D2D terminal device, and here, in the LTE system, the lower layer of the network device is Specifically, it refers to layer 1, that is, the physical layer, whereas the lower layer of the D2D terminal device depends on the D2D communication technology used for the D2D terminal device and the relay terminal device, for example, the D2D. When the communication technology is an LTE side link technology, the lower layer may be specifically a physical layer, and when the D2D communication technology is a WLAN or other communication technology, the lower layer is specifically. Other names may be used, and the examples of the present invention are not limited thereto.

In the embodiment of the present invention, data transmission between the Uu interface and the PC5 interface can both be performed via the physical layer. Optionally, if the network device or far-end terminal device needs to transmit data to the other party, it first encapsulates the data awaiting transmission in a MAC PDU, such as a MAC PDU, and then in that MAC PDU at a lower layer. The lower layer data frame can be obtained by processing the lower layer data frame, and the lower layer data frame can be transmitted to the relay terminal device. FIG. 2 schematically shows an example of a user plane protocol stack for relay transmission of each device, wherein the user plane protocol stack for relay transmission of the relay terminal device is layer 1 (that is, PHY layer). The user plane protocol stack of the far-end terminal device and the network device can include only layer 1 (L1), layer 2 (L2), and layer 3 (L3). Layer 1 of the relay terminal device is a peer layer of layer 1 of the far-end terminal device and layer 1 of each of the network devices, and layer 2 of the far-end terminal device is layer 2 of the network device. It is a peer layer. In this case, optionally, the relay terminal device does not identify the far-end terminal device corresponding to the received lower-layer data frame, but by the far-end terminal device and the network device, the upper layer (eg, MAC layer or further). The far-end terminal device corresponding to the data frame received in the upper layer) can be identified, but the embodiment of the present invention is not limited thereto.

For convenience, the following examples will be described mainly by exemplifying an example in which the lower layer is specifically a physical layer, but those skilled in the art will describe a D2D terminal device (also referred to as a far-end terminal device) and a relay terminal device. It should be understood that if the D2D communication technology adopted with is other communication technology, the lower layer may specifically have other names, and the embodiments of the present invention are described in this. Not limited to.

FIG. 3 schematically shows a relay transmission method 200 provided in an embodiment of the present invention. The method 200 can be applied to the wireless communication system 100 described above, but the examples of the present invention are not limited thereto. Specifically, the method 200 can be applied to relay transmission of uplink data, that is, the far-end terminal device transmits uplink data to a network device via the relay terminal device. In this case, the transmitting side device is specifically a far-end terminal device (may be referred to as a D2D terminal device), and the receiving side device is specifically a network device. Optionally, the method 200 can also be applied to relay transmission of downlink data, i.e., the network device transmits the downlink data to the far end terminal device via the relay terminal device. In this case, the transmitting device is a network device and the receiving device is a far-end terminal device, but the embodiments of the present invention are not limited thereto.

In S210, the transmitting device generates a MAC protocol data unit (PDU: Protocol Data Unit), and the MAC PDU includes identifier information of the far-end terminal device.

When the transmitting device determines that it is necessary to transmit data to the receiving device, the transmitting device can perform encapsulation processing on the data in the upper layer to obtain a MAC PDU. Here, the MAC PDU can include identifier information of the far-end terminal device. The identifier information of the far-end terminal device is used to identify the far-end terminal device.

Optionally, the identifier information of the far-end terminal device can include the terminal device identifier of the far-end terminal device, and the terminal device identifier is used to uniquely indicate the far-end terminal device. Can be Here, the terminal device identifier may be defined in advance. For example, the terminal device identifier may be specifically a device identifier of the far-end terminal device, a user identifier of the far-end terminal device, or the like. Arbitrarily, the identifier information of the far-end terminal device can include the specific identifier of the far-end terminal device, and the specific identifier of the far-end terminal device can use the far-end terminal device in relay transmission. It is used to indicate uniquely. The specific identifier may be a predefined one or may be configured by a network device. In order to reduce the signaling overhead, the length of the particular identifier may be smaller than the length of the terminal device identifier. The far-end terminal device and the network device identify the specific identifier in an upper layer, and the upper layer refers to a layer higher than the lower layer, for example, layer 2 or layer 3. Examples of the present invention are not limited thereto. For example, the specific identifier may be a layer 2 identifier. The layer 2 identifier can encapsulate and identify the identifier in layer 2, for example, in the MAC layer, RLC layer or PDCP layer. Optionally, the layer 2 identifier may be predefined or assigned by the network device to the far-end terminal device, for example, the layer 2 identifier may be assigned by the network device. In the process of establishing a bearer for a far-end terminal device, the bearer is assigned to the far-end terminal device, but the embodiments of the present invention are not limited thereto.

The identifier information of the far-end terminal device can be bearing at any possible position in the MAC PDU. Optionally, the identifier information of the far-end terminal device does not have to be bearing on the MAC control element (CE: Control Element) of the MAC PDU. For example, as shown in FIG. 4, the MAC CE is currently present. MAC CE or a new MAC CE, but the embodiments of the present invention are not limited thereto.

In S220, the transmitting device performs processing on the MAC PDU in a lower layer (for example, a physical layer) to generate a first lower layer data frame.

The transmitting side device can transmit the MAC PDU to a lower layer for processing, and transmit the processed MAC PDU to the relay terminal device via the lower layer. The transmitting device is optionally selected so that the relay terminal device can determine that the relay data is contained in the first lower layer data frame and needs to be transferred. Lower layer data frames can be set. Alternatively, the transmitting device is a transmission resource for relay transmission so that the relay terminal device can determine that the relay data is included in the first lower layer data frame based on the transmission resource. Alternatively, other methods may be used to transmit the first lower layer data frame, but the embodiments of the present invention are not limited thereto. For example, when a network device sets a transmission resource for relay transmission for the relay terminal device, the network device uses the transmission resource for relay transmission when it is necessary to transmit data to the far-end terminal device. It can be used to transmit the data to the relay terminal device, or if the network device sets up transmission resources for relay transmission for the far end terminal device, the far end terminal device will network. When it is necessary to transmit data to the device, the transmission resource for the relay transmission can be used to transmit the data to the relay terminal device, but the embodiment of the present invention is not limited to this.

In S230, the transmitting device transmits the first lower layer data frame to the relay terminal device.

In S240, the relay terminal device transfers the first lower layer data frame in the lower layer after receiving the first lower layer data frame transmitted by the transmitting device via the lower layer. You can be sure that you need it.

If, optionally, the first lower layer data frame is transmitted by the transmitting device using a transmission resource for relay transmission, the relay terminal device is the first lower layer in the lower layer. Based on the transmission resource occupied by the layer data frame, it can be determined that the first lower layer data frame contains relay data and needs to be transferred.

Optionally, the relay terminal device can relay and address using a specific radio network temporary identifier (RNTI: Radio Network Temporary Identity). Here, the relay specific RNTI corresponds to relay transmission. Optionally, the relay specific RNTI may be predefined or pre-assigned to a network device, and the embodiments of the present invention are not limited thereto. The relay terminal device receives a physical downlink control channel (PDCCH: Physical Downlink Control Channel) for scheduling the first lower layer data frame by addressing using the relay specific RNTI, ie. , The PDCCH for scheduling the first lower layer data frame is scrambled using the relay specific RNTI, in which case the relay terminal device is based on the relay specific RNTI. It can be determined that the lower layer data frame of 1 contains relay data and needs to be transferred, but the embodiments of the present invention are not limited to this.

Optionally, the relay terminal device can determine, by other means, whether the received lower layer data frame is transmitted to itself or needs to be relayed. , Examples of the present invention are not limited thereto.

In S250, the relay terminal device performs transfer processing on the first lower layer data frame in the lower layer.

When the relay terminal device determines that the relay data is included in the first lower layer data frame and needs to be relayed and transferred, the relay terminal device optionally selects the first lower layer data. The first lower layer data frame can be directly transmitted via the lower layer without performing decoding processing on the frame. Alternatively, the relay terminal device performs decoding processing on the first lower layer data frame in the lower layer, obtains the data included in the first lower layer data frame, and obtains the data included in the first lower layer data frame, and obtains the data included in the first lower layer data frame, and obtains the data included in the first lower layer data frame. The data contained in the first lower layer data frame can be transmitted. Specifically, the relay terminal device performs encoding processing on the data obtained by the decoding process in the lower layer, obtains a second lower layer data frame, and passes through the lower layer to the second lower layer. The lower layer data frame of the above can be transmitted, but the embodiment of the present invention is not limited to this.

In the optional case, when the receiving device is a far-end terminal device, the relay terminal device does not identify the far-end terminal device corresponding to the data contained in the first lower layer data frame, and is optionally selected. , The relay terminal device may be the data included in the first lower layer data frame in the broadcast method (specifically, the first lower layer data frame or the second lower layer data frame described above. ) Can be transmitted, for example, the relay terminal device can transmit the data included in the first lower layer data frame by the transmission resource for relay transmission, but the embodiment of the present invention is , Not limited to this.

If, optionally, the receiving device is a network device, the relay terminal device can transmit the data contained in the first lower layer data frame to the network device. Here, optionally, the relay terminal device can transmit the first lower layer data frame or the second lower layer data frame to the network device by the transmission resource for relay transmission. , Examples of the present invention are not limited to this.

Optionally, the relay terminal device requests an uplink permission to request an uplink transmission resource before transmitting the first lower layer data frame or the second lower layer data frame to the network device. A flow can also be performed, and the uplink transmission resource allocated by the network device can be used to transmit the first lower layer data frame or the second lower layer data frame to the network device. Here, optionally, the relay terminal device can determine the amount of data contained in the first lower layer data frame, and for example, obtains the amount of data contained in the first lower layer data frame. In order to do so, the relay terminal device can perform decoding processing on the first lower layer data frame in the lower layer, or the first lower layer data frame in the first lower layer data frame. Instructing information for indicating the amount of data included in the layer data frame can be included, and in the embodiment of the present invention, the relay terminal device determines the amount of data included in the first lower layer data frame. Not limited to.

Optionally, the relay terminal device can make an uplink permission request based on the amount of data contained in the first lower layer data frame. As a selectable embodiment, the Physical Uplink Control Channel (PUCCH) resource can have a correspondence with a preset amount of data or a preset amount of data interval, wherein the physical uplink control channel (PUCCH) resource can have a correspondence with a preset amount of data or a preset amount of data interval. , The correspondence may be predefined, or the network device may be preset, for example, the network device may pre-populate the correspondence by broadcast signaling or dedicated signaling. It can be set, and the examples of the present invention are not limited thereto. In this case, the relay terminal device sets the target PUCCH resource based on the amount of data included in the first lower layer data frame and the correspondence between the PUCCH resource and the preset data amount or data amount interval. It can be determined and the target PUCCH resource is used to send a scheduling request to the network device, but the embodiments of the present invention are not limited thereto.

In this case, after receiving the scheduling request, the network device determines the data amount or data amount interval corresponding to the scheduling request based on the PUCCH resource occupied by the scheduling request, and determines the corresponding data amount. Alternatively, uplink transmission resources can be allocated based on the data volume interval, but the embodiments of the present invention are not limited to this.

As another selectable embodiment, the relay terminal device can make an uplink permission request by transmitting a preamble code to a network device. Arbitrarily, the preamble code can have a correspondence with a preset amount of data or a preset amount of data interval, where the correspondence is even if it is predefined. Well, or the network device may be preset, for example, the network device can preset the correspondence by broadcast signaling or dedicated signaling, and the embodiments of the present invention include this. Not limited to this. In this case, the relay terminal device sets the target preamble code based on the amount of data included in the first lower layer data frame and the correspondence between the preamble code and the preset data amount or data amount interval. The target preamble code can be confirmed and transmitted to the network device, but the embodiments of the present invention are not limited to this.

In this case, after receiving the preamble code, the network device determines the data amount or data amount interval corresponding to the preamble code, and based on the corresponding data amount or data amount interval, provides an uplink transmission resource. Although assignable, the embodiments of the present invention are not limited thereto.

The relay terminal device can optionally make an uplink permission request by other methods, and the embodiments of the present invention are not limited thereto.

In S260, when the receiving device receives the first lower layer data frame or the second lower layer data frame transmitted by the relay terminal device, the receiving device receives the first lower layer data frame or the first lower layer data frame in the upper layer. Based on the identifier information of the far-end terminal device included in the second lower layer data frame, the far-end terminal device corresponding to the first lower layer data frame or the second lower layer data frame can be determined. ..

After receiving the first lower layer data frame or the second lower layer data frame transmitted by the relay terminal device, the far-end terminal device optionally receives the data frame in the upper layer (eg, layer 2). It is possible to identify the identifier information of the far-end terminal device included in the data frame, determine whether or not the data frame is transmitted to itself, and to determine that the data frame is transmitted to itself. If it is confirmed, the data frame can be decrypted, and if not, the data frame can be discarded, but the embodiment of the present invention is not limited thereto.

If, optionally, the network device receives the first lower layer data frame or the second lower layer data frame transmitted by the relay terminal device, the upper layer (eg, layer 2) is in the data frame. By identifying the included far-end terminal device identifier information, the far-end terminal device corresponding to the data frame can be determined, and the data frame can be assigned to the core network device based on the corresponding far-end terminal device. Data transmission tunneling of the far-end terminal device (eg, GPRS Tunneling Protocol (GTP)) between the network device and the core network device (eg, P-GW) is transmitted. ) Tunneling) is established, the network device can transmit the data contained in the data frame to the core network device by the data transmission tunneling corresponding to the far-end terminal device, but the embodiment of the present invention Is not limited to this.

Optionally, prior to relay transmission, the network device can establish a bearer for the far-end terminal device. For example, data transmission tunneling (for example, GTP tunneling) of the far-end terminal device can be established between the network device and the P-GW, and the distance between the network device and the relay terminal device can be established. Wireless bearers for end terminal devices can be established, but the embodiments of the present invention are not limited thereto.

Optionally, the relay terminal device can receive a connection establishment request for the far-end terminal device, and the connection establishment request establishes a D2D communication link between the relay terminal device and the far-end terminal device. Used to request. Arbitrarily, the connection establishment request may be a direct communication request, and is used to request that a PC5 connection with the relay terminal device be established.

The relay terminal device can send a bearer establishment request to the core network device based on the connection establishment request, and the bearer establishment request can include the terminal device identifier of the far-end terminal device. The core network device may be an MME so that, optionally, data transmission tunneling (eg, GTP tunneling) of the far-end terminal device can be established between the P-GW and the network device. Well, the MME can transmit the terminal device identifier of the far-end terminal device included in the bearer establishment request to the P-GW, and the network device establishes the wireless bearer of the far-end terminal device. Here, the wireless bearer can include cellular data transmission tunneling between the network device and the relay terminal device, and D2D data transmission tunneling between the relay terminal device and the far-end terminal device.

The relay terminal device can receive a bearer establishment response transmitted by the network device, and the bearer establishment response includes configuration information of a wireless bearer established by the network device for the far-end terminal device. , Here, optionally, the configuration information of the radio bearer may include physical layer configuration information. Optionally, the radio bearer configuration information may further include at least one of MAC layer configuration information, PDCP layer configuration information, and RLC layer configuration information. Optionally, the configuration information of the radio bearer may include a layer 2 identifier assigned by the network device to the far-end terminal device, but the embodiments of the present invention are not limited thereto.

Optionally, the relay terminal device can send a connection establishment response to the far-end terminal device based on the bearer establishment response, which includes the physical layer configuration information or the said. At least one of the MAC layer configuration information, the PDCP layer configuration information, and the RLC layer configuration information may be further included, or the layer 2 identifier of the far-end terminal device may be included, but the embodiments of the present invention include. Not limited to this.

Optionally, prior to relay transmission, the network device can establish a bearer for the far-end terminal device. For example, data transmission tunneling (for example, GTP tunneling) of the far-end terminal device can be established between the network device and the P-GW, and the far-end terminal device can be established between the network device and the relay terminal device. A wireless bearer for a terminal device can be established, but embodiments of the present invention are not limited thereto.

Optionally, the relay terminal device can receive a connection establishment request for the far-end terminal device, and the connection establishment request provides a D2D communication link between the relay terminal device and the far-end terminal device. Used to establish. Arbitrarily, the connection establishment request may be a direct communication request, and is used to request that a PC5 connection with the relay terminal device be established.

The relay terminal device can send a bearer establishment request to the core network device based on the connection establishment request, and the bearer establishment request can include the terminal device identifier of the far-end terminal device. Optionally, the core network device may be an MME so that data transmission tunneling (eg, GTP tunneling) of the far-end terminal device can be established between the P-GW and the network device. , The MME can transmit the terminal device identifier of the far-end terminal device included in the bearer establishment request to the P-GW, and the network device can establish the wireless bearer of the far-end terminal device. Where possible, the wireless bearer may include cellular data transmission tunneling between the network device and the relay terminal device, and D2D data transmission tunneling between the relay terminal device and the far-end terminal device. it can.

The relay terminal device can receive a bearer establishment response transmitted from the network device, and the bearer establishment response includes configuration information of a wireless bearer established by the network device for the far-end terminal device. , Here, optionally, the configuration information of the radio bearer may include physical layer configuration information. Here, optionally, the physical layer configuration information can include a relay specific RNTI and / or a physical resource for relay transmission, and here, the physical resource for relay transmission includes a relay terminal device and a network device. It can include a physical resource for relay transmission with and / or a physical resource for relay transmission between the relay terminal device and the far-end terminal device. Optionally, the physical layer configuration information includes instruction information for showing the correspondence between the preamble code and the data amount interval, and / or instruction information for showing the correspondence between the PUCCH resource and the data amount interval. However, the examples of the present invention are not limited to this.

Optionally, the radio bearer configuration information may include layer 2 configuration information, which is at least one of MAC layer configuration information, RLC layer configuration information, and PDCP layer configuration information. Can be included. Optionally, the Layer 2 configuration information may include a Layer 2 identifier assigned by the network device for the far-end terminal device, but the embodiments of the present invention are not limited thereto.

Optionally, the relay terminal device can transmit a connection establishment response to the far-end terminal device based on the bearer establishment response, and the connection establishment response is the MAC layer configuration information and the RLC layer configuration information. , And at least one of the PDCP layer configuration information can be included. If, optionally, the connection establishment response does not include the above layer 2 configuration information, the far-end terminal device is set for layer 2 based on the received D2D broadcast message of the relay terminal device. If, optionally, the connection establishment response includes the above layer 2 configuration information, the far-end terminal device has the MAC layer configuration information, the RLC layer configuration information, and the PDCP included in the connection establishment response. It can be set for layer 2 based on at least one of the layer configuration information, but the examples of the present invention are not limited to this.

Therefore, the relay transmission method according to the embodiment of the present invention adopts a lower layer relay method by the relay terminal device to relay data between the far-end terminal device and the network device, and here, the far-end terminal device or The network device transmits a lower layer data frame to the relay terminal device, and the relay terminal device determines that the received data frame contains the relay data without identifying the far end terminal device in the lower layer. In this case, the processing complexity of the relay terminal device and the transmission of relay data are compared with the method in which the relay terminal device in the prior art adopts layer 3 to perform relay transfer processing for the data frame by the lower layer. The delay can be reduced and the performance of the entire system can be improved.

Hereinafter, examples of the present invention will be described in detail by combining specific examples. It should be noted that these examples are for those skilled in the art to better understand the embodiments of the present invention, and do not limit the scope of the embodiments of the present invention.

For convenience, in the example below, it is assumed that the cellular network has already established a PDN connection and bearer for the far-end terminal device, the far-end terminal device is specifically the far-end UE, and the relay terminal device is specifically. It is assumed that the relay UE is specifically a relay UE, the network device is specifically an eNB, and the lower layer corresponding to the PC5 interface is specifically a physical layer. When another D2D communication technology of the LTE side link technology having a different PC5 interface is used, the lower layer may be specifically layer 1 corresponding to the other D2D communication technology of the present invention. Examples are not limited to this.

FIG. 5 shows a relay transmission method 300 provided in another embodiment of the present invention. The method 300 can be applied to relay transmission of downlink data.

In S310, when the P-GW receives the data transmitted to the far-end terminal device, it transmits the data to the eNB via the GTP tunneling of the S1-U interface assigned in the bearer establishment process.

In S320, after receiving the data of the far-end terminal device from GTP tunneling, the eNB encapsulates the data as a MAC PDU of the Uu interface, and here, the identifier information of the far-end terminal device is stored in the MAC PDU of the Uu interface. For example, a layer 2 identifier or a terminal device identifier is included.

In S330, the eNB schedules downlink data transmission by the PDCCH addressing at the relay specific RNTI, and the Uu is attached to the relay terminal device in the physical downlink data channel (PDSCH: Physical Downlink Sharp Channel) via the physical layer. The MAC PDU of the interface can be transmitted.

In this case, the eNB can optionally be scrambled to the PDCCH by the relay specific RNTI to indicate that the PDCCH is for scheduling relay data transmission. Accordingly, the relay terminal device can be addressed based on the relay specific RNTI, but the embodiments of the present invention are not limited thereto.

In S340, the relay terminal device receives the MAC PDU of the Uu interface via the physical layer, determines the relay data included in the MAC PDU received in the physical layer, and determines the MAC of the PC5 interface via the physical layer. PDU can be transmitted.

In this case, the relay terminal device does not have to identify the far-end terminal device corresponding to the received MAC PDU. Arbitrarily, the relay terminal device does not have to perform decryption processing on the received MAC PDU. In this case, the MAC PDU of the Uu interface is the same as the MAC PDU of the PC5 interface. Is also good. Alternatively, the relay terminal device can perform decoding and encoding processing on the MAC PDU of the Uu interface received at the physical layer to obtain the MAC PDU of the PC5 interface. Not limited to this.

In S350, the relay terminal device can transmit the MAC PDU of the PC5 interface in the specific time frequency resource for relay transmission.

Here, the relay terminal device can broadcast the MAC PDU of the PC5 interface in the time frequency resource for relay transmission.

In S360, the far-end terminal device receives the MAC PDU of the PC5 interface via the physical layer, and then in the upper layer (for example, layer 2), the identifier information of the far-end terminal device included in the MAC PDU of the PC5 interface. It is possible to perform an analysis process on the MAC PDU and determine whether or not the MAC PDU is transmitted to itself. If it is determined that the received MAC PDU is to be transmitted to itself, the far-end terminal device can optionally perform further processing such as decoding on the MAC PDU. The far-end terminal device may discard the MAC PDU if it determines that the received MAC PDU is not transmitted to itself, but the embodiments of the present invention are not limited thereto. ..

FIG. 6 shows a relay transmission method 400 provided in another embodiment of the present invention. The method 400 can be applied to relay transmission of uplink data.

In S410, when the far-end terminal device has data waiting to be transmitted to the cellular network, the far-end terminal device encapsulates the data as a MAC PDU, where the MAC PDU is the identifier information of the far-end terminal device. including.

In S420, the far-end terminal device transmits the MAC PDU via the PC5 interface in the time-frequency resource for relay transmission of the physical layer.

In S430, in order to determine the amount of data contained in the MAC PDU, the relay terminal device receives the MAC PDU from the far-end terminal device via the physical layer, and then the MAC received in the physical layer. Decryption processing can be performed on the PDU.

In this case, the relay terminal device does not have to identify the far-end terminal device corresponding to the received MAC PDU, and can identify the amount of data contained in the MAC PDU only in the physical layer.

Arbitrarily, in S440, the relay terminal device determines the PUCCH resource corresponding to the amount of data included in the MAC PDU based on the correspondence relationship between the preset data amount interval and the PUCCH resource, and the corresponding correspondence. Send a scheduling request to the eNB using the PUCCH resource.

In S450, after receiving the scheduling request transmitted by the relay terminal device, the eNB determines the data amount interval waiting for transmission of the relay terminal device based on the PUCCH resource occupied by the scheduling request, and determines the transmission-waiting data amount interval. Uplink transmission resources can be allocated to the relay terminal device by PDCCH based on the data amount interval.

In S460, the relay terminal device can transmit the MAC PDU of the Uu interface by the uplink transmission resource allocated to the eNB of the physical layer after receiving the PDCCH transmitted by the eNB.

In S470, in order to identify the far-end terminal device corresponding to the MAC PDU, the eNB receives the MAC PDU transmitted by the relay terminal device via the physical layer and then in the upper layer (for example, layer 2). , Uu interface MAC PDU can be analyzed.

In S480, the eNB can transmit the data contained in the MAC PDU to the P-GW via the S1 interface in the GTP tunneling corresponding to the far-end terminal device.

It should be noted that the examples of FIGS. 5 and 6 are for those skilled in the art to better understand the embodiments of the present invention, and do not limit the scope of the embodiments of the present invention. Those skilled in the art can clearly make various equivalent modifications and modifications based on the examples of FIGS. 5 and 6, and such modifications or modifications are also within the scope of the embodiments of the present invention.

In each embodiment of the present invention, the number of each process described above does not mean the order before and after the execution, and the order of execution of each process should be determined by its function and its own logic. It should be understood that it does not limit the process of implementation of.

In the above, the relay transmission method according to the embodiment of the present invention is described in detail by combining FIGS. 1 to 6, and below, the relay transmission according to the embodiment of the present invention is combined with FIGS. 7 to 12. The device will be described in detail.

FIG. 7 schematically shows a relay transmission device 500 provided in an embodiment of the present invention. The device 500 includes a receiving unit 510 and a processing unit 520.

The receiving unit 510 is configured to receive a first lower layer data frame transmitted by the transmitting device to the receiving device, wherein the first lower layer data frame is the lower layer of the transmitting device. It is obtained by processing the media access control (MAC) protocol data unit (PDU) including the far-end terminal device identifier information.

The processing unit 520 determines that it is necessary to transfer the first lower layer data frame received by the receiving unit 510 in the lower layer, and further, in the lower layer, to the first lower layer data frame. On the other hand, it is configured to perform transfer processing.

Here, the transmitting device is the far-end terminal device and the receiving device is a network device, or the transmitting device is a network device and the receiving device is the far-end terminal device. is there.

If, optionally, the transmitting device is a network device, the processing unit 520 receives the receiving unit 510 before the transmitting device receives the first lower layer data frame transmitted to the receiving device. It is further configured to address by a relay specific radio network temporary identifier (RNTI). In this case, the processing unit 520 specifically, when the first lower layer data frame is received by the relay terminal device by the addressing, the relay terminal device is the first lower layer. It is configured to determine that a layer data frame needs to be transferred.

Optionally, the first lower layer data frame is transmitted by the transmitting device using a transmission resource for relay transmission. In this case, the processing unit 520 determines that it is necessary to specifically transfer the first lower layer data frame based on the transmission resource occupied by the first lower layer data frame. It is configured as follows.

Optionally, the identifier information of the far-end terminal device includes a layer 2 identifier of the far-end terminal device or a terminal device identifier of the far-end terminal device.

Optionally, the lower layer of the network device is specifically a physical layer, and the lower layer of the far-end terminal device is a D2D communication technology adopted between the far-end terminal device and the relay terminal device. Corresponds to.

Optionally, the identifier information of the far-end terminal device is bearing in the MAC control element field of the MAC PDU.

If, optionally, the transmitting device is the far-end terminal device and the receiving device is the network device, the processing unit 520 relatives to the first lower layer data frame in the lower layer. Before performing the transfer process, the lower layer corresponds to the amount of data contained in the first lower layer data frame based on the correspondence between the physical uplink control channel (PUCCH) resource and the data amount or data amount interval. The device 500 is further configured to determine the physical uplink control channel (PUCCH) resource to be generated, and accordingly, the device 500 further includes a first transmit unit and the corresponding PUCCH resource determined by the processing unit 520. Is configured to send a scheduling request to the network device in question.

If, optionally, the transmitting device is the far-end terminal device and the receiving device is the network device, the processing unit 520 relatives to the first lower layer data frame in the lower layer. Before performing the transfer process, in the lower layer, the preamble code corresponding to the amount of data included in the first lower layer data frame is determined based on the correspondence relationship between the preamble code and the data amount or the data amount interval. The device 500 is further configured to include a first transmission unit and transmit the corresponding preamble code to the network device, the corresponding preamble code being the network device. Is used to allocate uplink transmission resources to the relay terminal device.

Arbitrarily, the processing unit 520 specifically performs decoding processing on the first lower layer data frame, acquires the data included in the first lower layer data frame, and further, the data The device 500 is configured to perform coding processing on the data to obtain a second lower layer data frame, and accordingly, the device 500 further includes a second transmission unit, and the second unit obtained by the processing unit 520. It is configured to send a lower layer data frame of.

Optionally, the apparatus 500 further includes a second transmit unit, wherein the processing unit 520 specifically, by the second transmit unit, causes the first lower layer data frame in a lower layer. It is configured to send directly.

In a selectable example, the device 500 may specifically be the relay terminal device in the above embodiment, where the device 500 corresponds to each flow and / or corresponding relay terminal device in the above method embodiment. The steps can be configured to be performed and are omitted here to avoid duplication.

FIG. 8 schematically shows another relay transmission device 600 provided in the embodiment of the present invention. Here, the device 600 is specifically the far-end terminal device, or the transmitting device is a network device. As shown in FIG. 8, the device 600 includes a processing unit 610 and a transmitting unit 620.

The processing unit 610 is configured to generate a media access control (MAC) protocol data unit (PDU), where the MAC PDU contains identifier information for a far-end terminal device.

The transmission unit 620 is configured to transmit to the relay terminal device a first lower layer data frame obtained by processing the MAC PDU in the lower layer.

Optionally, if the device 600 is a network device, the transmit unit 620 is configured to transmit the PDCCH to the relay terminal device before transmitting the first lower layer data frame to the relay terminal device. Here, the PDCCH is used to schedule the first lower layer data frame, and the PDCCH is scrambled using the Relay Specific Radio Network Temporary Identifier (RNTI).

Optionally, the transmission unit 620 is specifically configured to transmit the first lower layer data frame to the relay terminal device using transmission resources for relay transmission.

Optionally, the identifier information of the far-end terminal device includes a layer 2 identifier of the far-end terminal device or a terminal device identifier of the far-end terminal device.

Optionally, the identifier information of the far-end terminal device is bearing in the MAC control element field of the MAC PDU.

In a selectable example, the device 600 may specifically be the transmitting device in the above embodiment, where the device 600 corresponds to each flow and / or corresponding transmitting device in the above method embodiment. The steps can be configured to be performed and are omitted here to avoid duplication.

FIG. 9 shows another relay transmission device 700 provided in the embodiment of the present invention. Here, the device 700 is specifically a network device, or the receiving device is the far-end terminal device. As shown in FIG. 9, the device 700 includes a receiving unit 710 and a processing unit 720.

The receiving unit 710 is configured to receive a second lower layer data frame transmitted by the relay terminal device, wherein the second lower layer data frame is the far end terminal device identifier information in the lower layer. It is obtained by processing the media access control (MAC) protocol data unit (PDU) including.

In the processing unit 720, the second lower layer data frame is the second lower layer data frame based on the identifier information of the far-end terminal device included in the second lower layer data frame received by the receiving unit 710 in the upper layer. It is configured to confirm that it is compatible with far-end terminal devices.

Optionally, the receiving unit 710 is specifically configured to receive a second lower layer data frame transmitted by the relay terminal device using transmission resources for relay transmission.

Correspondingly, the processing unit 720 specifically transfers the second lower layer data frame by the relay terminal device based on the transmission resource occupied by the second lower layer data frame. It is configured to determine that.

If, optionally, the device 700 is the network device, the processing unit 720 is further configured to determine the data transmission tunneling corresponding to the far-end terminal device. In this case, as shown in FIG. 9, the apparatus 700 further includes a transmission unit 730 and the second subordinate to the core network device via the corresponding data transmission tunneling determined by the processing unit 720. It is configured to transmit the data contained in the layer data frame.

Optionally, the identifier information of the far-end terminal device includes a layer 2 identifier of the far-end terminal device or a terminal device identifier of the far-end terminal device.

Optionally, the identifier information of the far-end terminal device is bearing in the MAC control element field of the MAC PDU.

Optionally, if the device 700 is a network device, the receiving unit 710 receives a scheduling request transmitted by the relay terminal device before receiving a second lower layer data frame transmitted by the relay terminal device. Is further configured to receive.

Correspondingly, the processing unit 720 is occupied by the scheduling request received by the receiving unit 710 based on the correspondence between the physical uplink control channel (PUCCH) resource and the data amount or the data amount interval. It is further configured to determine the data amount or data amount interval corresponding to the link control channel (PUCCH) resource and allocate the uplink transmission resource to the relay terminal device based on the corresponding data amount or data amount interval. ..

Optionally, if the device 700 is a network device, the receiving unit 710 has a preamble code transmitted by the relay terminal device before receiving a second lower layer data frame transmitted by the relay terminal device. Is further configured to receive.

Correspondingly, the processing unit 720 determines the amount of data corresponding to the preamble code received by the receiving unit 710 based on the correspondence relationship between the preamble code and the data amount or the data amount interval, and determines the corresponding data. It is further configured to allocate uplink transmission resources to the relay terminal device based on the quantity.

In a selectable example, the device 700 may specifically be the receiving device in the above embodiment, where the device 700 corresponds to each flow and / or corresponding receiving device in the above method embodiment. The steps can be configured to be performed and are omitted here to avoid duplication.

In addition, any of the above-mentioned device 500, device 600, and device 700 appears as a functional unit. The term "unit" as used herein refers to an application specific integrated circuit (ASIC), an electronic circuit, or a processor (eg, a shared processor, a dedicated processor or processor) for executing one or more software or firmware programs. It can mean a set etc.) and a storage device, a combination logic circuit and / or other suitable components that support the described functions.

FIG. 10 schematically shows a relay transmission device 800 provided in an embodiment of the present invention. The device 800 includes a receiver 810 and a processor 820.

The receiver 810 is configured to receive a first lower layer data frame that the transmitting device transmits to the receiving device, wherein the first lower layer data frame is such that the transmitting device is in a lower layer. It is obtained by processing the media access control (MAC) protocol data unit (PDU) including the far-end terminal device identifier information.
The processor 820 determines in the lower layer that it is necessary to transfer the first lower layer data frame received by the receiver 810, and in the lower layer, with respect to the first lower layer data frame. It is configured to perform transfer processing.

Here, the transmitting device is the far-end terminal device and the receiving device is a network device, or the transmitting device is a network device and the receiving device is the far-end terminal device. is there.

If, optionally, the transmitting device is a network device, the processor 820 relays and identifies the receiver 810 before receiving the first lower layer data frame transmitted by the transmitting device to the receiving device. It is further configured to address by a wireless network temporary identifier (RNTI). In this case, the processor 820 specifically, when the first lower layer data frame is received by the relay terminal device by the addressing, the relay terminal device is the first lower layer. It is configured to establish that the data frame needs to be transferred.

Optionally, the first lower layer data frame is transmitted by the transmitting device using a transmission resource for relay transmission. In this case, the processor 820 specifically determines that the first lower layer data frame needs to be transferred based on the transmission resource occupied by the first lower layer data frame. It is composed of.

Optionally, the identifier information of the far-end terminal device includes a layer 2 identifier of the far-end terminal device or a terminal device identifier of the far-end terminal device.

Optionally, the lower layer of the network device is specifically a physical layer, and the lower layer of the far-end terminal device is a D2D communication technology adopted between the far-end terminal device and the relay terminal device. Corresponds to.

Optionally, the identifier information of the far-end terminal device is bearing in the MAC control element field of the MAC PDU.

If, optionally, the transmitting device is the far-end terminal device and the receiving device is the network device, the processor 820 transfers to the first lower layer data frame in the lower layer. Before processing, the lower layer corresponds to the amount of data contained in the first lower layer data frame based on the correspondence between the physical uplink control channel (PUCCH) resource and the data amount or data amount interval. The device 800 is further configured to determine the physical uplink control channel (PUCCH) resource, and accordingly, the device 800 further includes a transmitter 830 and uses the corresponding PUCCH resource determined by the processor 820. It is configured to send a scheduling request to the network device.

If, optionally, the transmitting device is the far-end terminal device and the receiving device is the network device, the processor 820 transfers to the first lower layer data frame in the lower layer. Before processing, in the lower layer, the preamble code corresponding to the amount of data included in the first lower layer data frame is determined based on the correspondence relationship between the preamble code and the data amount or the data amount interval. Further configured, accordingly, as shown in FIG. 10, the device 800 further includes a transmitter 830 and is configured to transmit the corresponding preamble code to the network device, the corresponding preamble code being said. A network device is used to allocate uplink transmission resources to the relay terminal device.

Arbitrarily, the processor 820 specifically performs a decoding process on the first lower layer data frame, acquires the data included in the first lower layer data frame, and further converts the data into the data. The device 800 is configured to perform encoding processing on the data to obtain a second lower layer data frame, and accordingly, the device 800 further includes a transmitter 830 and the second lower layer data frame obtained by the processor 820. Is configured to send.

Optionally, the apparatus 800 further includes a transmitter 830, wherein the processor 820 specifically transmits the first lower layer data frame in the lower layer directly by the transmitter 830. It is composed.

In a selectable example, the device 800 may specifically be the relay terminal device in the above embodiment, where the device 800 corresponds to each flow and / or corresponding relay terminal device in the above method embodiment. It can be configured to carry out steps. Optionally, the device 800 may further include a storage device, which storage device may include read-only memory and random access memory to provide instructions and data to the processor. Some of the storage devices may further include non-volatile random access memory. For example, a storage device can store device type information. The processor is configured to execute an instruction stored in the storage device, and when the processor executes an instruction stored in the storage device, the processor performs each step and / or flow of the above method embodiment. It is configured to.

FIG. 11 schematically illustrates another relay transmission device 900 provided in an embodiment of the present invention. Here, the device 900 is specifically the far-end terminal device, or the transmitting device is a network device. As shown in FIG. 11, the device 900 includes a processor 910 and a transmitter 920.

Processor 910 is configured to generate a media access control (MAC) protocol data unit (PDU), where the MAC PDU contains identifier information for far-end terminal devices.

The transmitter 920 is configured to transmit to the relay terminal device a first lower layer data frame obtained by processing the MAC PDU at the lower layer.

Optionally, if the device 900 is a network device, the transmitter 920 is configured to transmit a PDCCH to the relay terminal device before transmitting the first lower layer data frame to the relay terminal device. Here, the PDCCH is used to schedule the first lower layer data frame, and the PDCCH is scrambled using the Relay Specific Radio Network Temporary Identifier (RNTI).

Optionally, the transmitter 920 is specifically configured to transmit the first lower layer data frame to the relay terminal device using transmission resources for relay transmission.

Optionally, the identifier information of the far-end terminal device includes a layer 2 identifier of the far-end terminal device or a terminal device identifier of the far-end terminal device.

Optionally, the identifier information of the far-end terminal device is bearing in the MAC control element field of the MAC PDU.

In a selectable example, the device 900 may specifically be the transmitting device in the above embodiment, where the device 900 corresponds to each flow and / or corresponding transmitting device in the above method embodiment. It can be configured to carry out steps. Optionally, the device 900 may further include a storage device, which storage device may include read-only memory and random access memory to provide instructions and data to the processor. Some of the storage devices may further include non-volatile random access memory. For example, a storage device can store device type information. The processor is configured to execute an instruction stored in the storage device, and when the processor executes an instruction stored in the storage device, the processor performs each step and / or flow of the above method embodiment. It is configured to.

FIG. 12 shows another relay transmission device 1000 provided in the embodiment of the present invention. Here, the device 1000 is specifically a network device, or the receiving device is the far-end terminal device. As shown in FIG. 12, the device 1000 includes a receiver 1010 and a processor 1020.

The receiver 1010 is configured to receive a second lower layer data frame transmitted by the relay terminal device, wherein the second lower layer data frame receives far-end terminal device identifier information in the lower layer. It is obtained by processing the including media access control (MAC) protocol data unit (PDU).

In the upper layer, the processor 1020 sets the second lower layer data frame to the far end based on the identifier information of the far end terminal device included in the second lower layer data frame received by the receiver 1010. It is configured to confirm that it corresponds to the terminal device.

Optionally, the receiver 1010 is specifically configured to receive a second lower layer data frame transmitted by the relay terminal device using transmission resources for relay transmission.

Correspondingly, the processor 1020 specifically transfers the second lower layer data frame by the relay terminal device based on the transmission resource occupied by the second lower layer data frame. It is configured to confirm that there is.

Optionally, if the device 1000 is the network device, the processor 1020 is further configured to determine the data transmission tunneling corresponding to the far-end terminal device. In this case, as shown in FIG. 12, the apparatus 1000 further includes a transmitter 1030 and the second lower layer data frame to the core network device via the corresponding data transmission tunneling determined by the processor 1020. It is configured to send the data contained in.

Optionally, the identifier information of the far-end terminal device includes a layer 2 identifier of the far-end terminal device or a terminal device identifier of the far-end terminal device.

Optionally, the identifier information of the far-end terminal device is bearing in the MAC control element field of the MAC PDU.

Optionally, if the device 1000 is a network device, the receiver 1010 makes a scheduling request transmitted by the relay terminal device before receiving a second lower layer data frame transmitted by the relay terminal device. Further configured to receive.

Correspondingly, the processor 1020 uses the physical uplink control occupied by the scheduling request received by the receiver 1010 based on the correspondence between the physical uplink control channel (PUCCH) resource and the data amount or data amount interval. The data amount or data amount interval corresponding to the channel (PUCCH) resource is determined, and the uplink transmission resource is allocated to the relay terminal device based on the corresponding data amount or data amount interval.

Optionally, if the device 1000 is a network device, the receiver 1010 sends a preamble code transmitted by the relay terminal device before receiving a second lower layer data frame transmitted by the relay terminal device. Further configured to receive.

Correspondingly, the processor 1020 determines the amount of data corresponding to the preamble code received by the receiver 1010 based on the correspondence relationship between the preamble code and the data amount or the data amount interval, and determines the amount of data corresponding to the preamble code and sets the corresponding data amount. Based on this, the relay terminal device is further configured to allocate uplink transmission resources.

In a selectable example, the device 1000 may specifically be the receiving device in the above embodiment, where the device 1000 corresponds to each flow and / or corresponding receiving device in the method embodiment. It can be configured to carry out steps. Optionally, device 1000 may further include a storage device, which storage device may include read-only memory and random access memory, providing instructions and data to the processor. Some of the storage devices may further include non-volatile random access memory. For example, a storage device can store device type information. The processor is configured to execute an instruction stored in the storage device, and when the processor executes an instruction stored in the storage device, the processor performs each step and / or flow of the above method embodiment. It is configured to.

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, a digital signal processor (DSP), or a dedicated integrated circuit (ASIC). ), Field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The general-purpose processor may be a microprocessor, or the processor may be any ordinary processor or the like.

In the realization process, each step in the embodiment of the above method may be completed by a hardware integrated logic circuit in the processor or a software form instruction. The steps of combining the methods disclosed in the embodiments of the present invention appear directly when performed in a hardware process or in a combination of hardware and software within a processor. Software modules may be located in mature storage media in the art such as random storage devices, flashes, read-only storage devices, programmable read-only memory or electrically erasable programmable memory, registers. The storage medium is located in memory, and the processor executes instructions in memory and combines with its hardware to complete the steps of the above method. Omitted here to avoid duplication.

In addition, in order to avoid duplication, the description of the examples in the present application mainly emphasizes the different parts between the respective examples, and it is possible to refer to the similar or similar parts thereof.

Those skilled in the art will appreciate that each method step and unit that combines the description of the examples disclosed in the present application can be realized by electronic hardware, computer software, or a combination thereof. In order to clearly explain the possibility of compatibility between hardware and software, the steps and compositions of each embodiment are generally described based on the functions in the above description. Whether these functions are executed by hardware or software depends on the specific operation of the technical proposal and design constraints. One of ordinary skill in the art can realize the described functions using different methods based on each identified operation, but such realization is not outside the scope of the present invention.

Those skilled in the art should clearly understand that the examples of the multimedia information reproduction method, the example of the standardized server, and the example of the live broadcasting terminal described above can be referred to each other. For convenience and conciseness of explanation, I will not mention further here.

In some of the embodiments provided in the present application, the disclosed systems, devices and methods may be implemented in other ways. For example, the examples of the devices described above are merely exemplary, for example, the division of the units is merely a logical functional division, and in fact, other divisions when realized. It may be present, for example, a plurality of units or components may be integrated or assembled into another system, or some technical features may be omitted or not implemented. Also, the mutual coupling, or direct coupling, or communication connection of each component specified or discussed is connected by indirect coupling or communication of some interfaces, devices, or units. It may be of any form, electrical, mechanical, or other.

The units described above as separate components may or may not be physically separated. The component shown as a unit may or may not be a physical unit. It may be arranged in one place or distributed to a plurality of network units. Depending on the actual needs, some or all of the units may be selected to realize the purpose of the technical proposal of this embodiment.

Further, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may be a single unit, and two or more units may be integrated into one unit. You may. The above-mentioned integrated unit may be realized by hardware or may be realized by a software function unit.

The integrated unit may be implemented in the form of a software functional module and may be stored on a computer-readable storage medium when sold or used as an independent product. Thereby, the technical proposal of the embodiment of the present invention can be embodied in the form of a software product as a part that contributes to the prior art in effect, and the computer software product is stored in a storage medium and is stored in a computer device (personal computer, It includes a plurality of instructions for causing a server, a network device, or the like) to execute all or part of the above methods of each embodiment of the present invention. The above storage medium stores various program codes such as a USB memory, a mobile storage medium, a read-only memory (ROM: Read-Only Memory), a random access storage device (RAM: Random Access Memory), a magnetic disk, or a compact disk. Includes capable media.

The above description is merely a specific embodiment of the present invention, and the present invention is not limited thereto, and modifications or modifications that can be easily conceived by those skilled in the art within the scope disclosed in the present invention. All replacements should be included within the scope of the present invention. Therefore, the scope of the present invention should conform to the stated claims.

Claims (10)

It is a relay transmission method
The relay terminal device receives the first lower layer data frame transmitted by the transmitting device to the receiving device, and
The relay terminal device determines that it is necessary to transfer the first lower layer data frame in the lower layer.
The relay terminal device performs transfer processing on the first lower layer data frame in the lower layer, and
Including
Here, the first lower layer data frame is obtained by processing the transmitting device on a media access control (MAC) protocol data unit (PDU) including far-end terminal device identifier information in the lower layer. Is a thing
The transmitting device is the far-end terminal device and the receiving-side device is a network device, or the transmitting-side device is a network device and the receiving-side device is the far-end terminal device.
The relay transmission method, characterized in that. The first lower layer data frame is transmitted by the transmitting device using a transmission resource for relay transmission.
Determining that the relay terminal device needs to transfer the first lower layer data frame can be determined.
The relay terminal device comprises determining that the first lower layer data frame needs to be transferred based on the transmission resource occupied by the first lower layer data frame.
The relay transmission method according to claim 1, wherein the relay transmission method is characterized in that. The identifier information of the far-end terminal device includes a layer 2 identifier of the far-end terminal device or a terminal device identifier of the far-end terminal device.
The relay transmission method according to any one of claims 1 to 2, wherein the relay transmission method is characterized. The lower layer of the network device is specifically a physical layer, and the lower layer of the far-end terminal device corresponds to the D2D communication technology adopted between the far-end terminal device and the relay terminal device.
The relay transmission method according to any one of claims 1 to 3, wherein the relay transmission method is characterized. The identifier information of the far-end terminal device is bearing in the MAC control element field of the MAC PDU.
The relay transmission method according to any one of claims 1 to 4, wherein the relay transmission method is characterized. When the transmitting side device is the far-end terminal device and the receiving side device is the network device, before the relay terminal device performs transfer processing on the first lower layer data frame in the lower layer. In addition, the above method
In the lower layer, the relay terminal device corresponds to the amount of data included in the first lower layer data frame based on the correspondence relationship between the physical uplink control channel (PUCCH) resource and the data amount or the data amount interval. Determining physical uplink control channel (PUCCH) resources and
The relay terminal device uses the corresponding PUCCH resource to send a scheduling request to the network device.
Including,
The relay transmission method according to any one of claims 1 to 5, wherein the relay transmission method is characterized. When the transmitting side device is the far-end terminal device and the receiving side device is the network device, before the relay terminal device performs transfer processing on the first lower layer data frame in the lower layer. In addition, the above method
In the lower layer, the relay terminal device determines the preamble code corresponding to the data amount included in the first lower layer data frame based on the correspondence relationship between the preamble code and the data amount or the data amount interval. ,
The relay terminal device transmits the corresponding preamble code to the network device, and
Including
The corresponding preamble code is used by the network device to allocate uplink transmission resources to the relay terminal device.
The relay transmission method according to any one of claims 1 to 5, wherein the relay transmission method is characterized. In the lower layer, the relay terminal device may perform transfer processing on the first lower layer data frame.
The relay terminal device performs decoding processing on the first lower layer data frame to acquire the data included in the first lower layer data frame.
The relay terminal device performs coding processing on the data to obtain a second lower layer data frame.
The relay terminal device transmits the second lower layer data frame, and
including,
The relay transmission method according to any one of claims 1 to 7, wherein the relay transmission method is characterized. When the relay terminal device performs transfer processing on the first lower layer data frame in the lower layer,
The relay terminal device includes directly transmitting the first lower layer data frame via the lower layer.
The relay transmission method according to any one of claims 1 to 7, wherein the relay transmission method is characterized. It is a relay transmission method
The sending device generates a media access control (MAC) protocol data unit (PDU), and
The transmitting device transmits the first lower layer data frame obtained by processing the MAC PDU in the lower layer to the relay terminal device.
Where the MAC PDU contains the identifier information of the far-end terminal device, the transmitting-side device is the far-end terminal device, or the transmitting-side device is a network device.
The relay transmission method, characterized in that.