WO2020166037A1 - Communication device and communication method - Google Patents

Abstract

This communication device is provided with: a control unit that selects one of a first setting for performing sidelink reception by a second communication system simultaneously with performing sidelink transmission by a first communication system, and a second setting for performing sidelink reception by the first communication system simultaneously with performing sidelink transmission by the second communication system; a transmission unit that performs sidelink transmission in accordance with the setting selected by the control unit; and a reception unit that performs sidelink reception in accordance with the setting selected by the control unit.

Description

Communication device and communication method

The present invention relates to a communication device and a communication method in a wireless communication system.

In LTE (Long Term Evolution) and a successor system to LTE (eg, LTE-A (LTE Advanced), NR (New Radio) (also referred to as 5G)), communication devices such as User Equipment (UE) go through base stations. A side link (also referred to as D2D (Device to Device)) technology that directly communicates without a communication is under study (Non-Patent Document 1).

Also, the realization of V2X (Vehicle to Everything) is being considered and specifications are being advanced. Here, V2X is a part of ITS (Intelligent Transport Systems), and as shown in FIG. 1, V2V (Vehicle to Vehicle), which means a form of communication performed between cars, is installed on the side of a car and a road. V2I (Vehicle to Infrastructure), which means the form of communication with a road-side unit (RSU), and V2N (Vehicle to), which means the form of communication between the car and the mobile terminal of the driver. It is a general term for Nomadic device) and V2P (Vehicle to Pedestrian), which means a communication mode between a car and a pedestrian's mobile terminal.

3GPP TS 38.213 V15.3.0 (2018-09) 3GPP TS 38.211 V15.3.0 (2018-09) 3GPP TS 38.331 V15.3.0 (2018-09)

NR-V2X is supposed to support more reliable communication compared to LTE-V2X. This is because it is assumed that the NR-V2X use case supports automatic driving and the like, and it is necessary to improve the reliability of communication. In order to improve the reliability of communication, it is considered to support HARQ feedback and CSI feedback in NR-V2X. When such highly reliable communication is performed, it is considered that the communication device has more opportunities to perform communication.

In NR-V2X and LTE-V2X, the communication device communicates in half-duplex mode. That is, the communication device cannot perform reception when transmitting, and cannot perform transmission when receiving. Particularly, in NR-V2X, it is necessary to improve the reliability of communication, and it is necessary to solve the problem of half duplex.

According to one aspect of the present invention, a first setting in which sidelink transmission is performed in the first communication method and at the same time sidelink reception is performed in the second communication method, and a sidelink in the second communication method Of the side link according to the setting selected by the control unit and the setting selected by the control unit among the second settings for performing the transmission of the side link at the same time as receiving the side link by the first communication method. There is provided a communication device including a transmission unit that performs transmission, and a reception unit that receives a side link according to the setting selected by the control unit.

According to the embodiment, a technology that enables full-duplex communication with a side link is provided. That is, the communication device can simultaneously perform transmission and reception.

It is a figure for demonstrating V2X. It is a figure for demonstrating a side link. It is a figure for demonstrating a side link. FIG. 6 is a diagram for explaining a MAC PDU used for side link communication. It is a figure for demonstrating the format of SL-SCH subheader. It is a figure for demonstrating the example of the channel structure used by a side link. It is a figure which shows the structural example of the radio|wireless communications system which concerns on embodiment. It is a figure for demonstrating the resource selection operation of a communication apparatus. It is a figure which shows the outline of SL transmission mode 1 specified by V2X of NR. It is a figure which shows the outline of SL transmission mode 2a. It is a figure which shows the outline of SL transmission mode 2c. It is a figure which shows the outline of SL transmission mode 2d. It is a figure which shows the example of unicast PSCCH/PSSCH transmission. It is a figure which shows the example of group cast PSCCH/PSSCH transmission. It is a figure which shows the example of broadcast PSCCH/PSSCH transmission. It is a figure which shows the example which uses the communication of the side link of NR, and the communication of the side link of LTE simultaneously. It is a figure which shows the example at the time of performing a full-duplex communication using side link communication and NR side link communication. It is a figure which shows the example of State P and State Q. It is a figure showing an example in case a plurality of vehicles perform platooning. It is a figure which shows the example which switches the state of State P and State Q for every slot. It is a figure which shows an example of a functional structure of the base station which concerns on embodiment. It is a figure which shows an example of a functional structure of the communication apparatus which concerns on embodiment. It is a figure which shows an example of the hardware constitutions of the base station and communication apparatus which concern on embodiment.

Hereinafter, an embodiment of the present invention (this embodiment) will be described with reference to the drawings. The embodiments described below are merely examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.

The direct communication method between the communication devices in the present embodiment is assumed to be LTE or NR side link (SL (Sidelink)), but the direct communication method is not limited to this method. Further, the name “side link” is an example, and the name “side link” may not be used and UL (Uplink) may include the function of SL. SL may be distinguished from DL (Downlink) or UL by a difference in frequency or time resource, or may be another name.

Further, the UL and SL refer to a time resource, a frequency resource, a time/frequency resource, a reference signal for determining Pathloss in transmission power control, and a reference signal (PSS/SSS/PSSS/SSSS) used for synchronization. ) May be distinguished by a difference in any one or a combination of any two or more.

For example, in UL, the reference signal of the antenna port X is used as a reference signal that is referred to for determining Pathloss in transmission power control, and in SL (including UL used as SL), Pathloss is determined in transmission power control. The reference signal of the antenna port Y is used as the reference signal for the reference.

Further, in the present embodiment, it is mainly assumed that the communication device is mounted on the vehicle, but the embodiment of the present invention is not limited to this form. For example, the communication device may be a terminal held by a person, the communication device may be a device installed in a drone or an aircraft, the communication device may be a base station, an RSU, a relay station (relay node), It may be a user equipment or the like having a scheduling capability.

(Outline of side link)
In the present embodiment, the side link is used as a basic technique, so first, as a basic example, an outline of the side link will be described. An example of the technique described here is 3GPP Rel. It is a technology specified in 14 and the like. The technique may be used in NR, or a technique different from the technique may be used in NR. Here, the side link communication may be defined as a direct communication performed between two or more user equipments adjacent to each other without using a network node while using the E-UTRA technology. A sidelink may be defined as an interface between user devices in sidelink communication.

The side links are roughly divided into "discovery" and "communication". As for “discovery”, as shown in FIG. 2A, a resource pool for the Discovery message is configured (configured) for each Discovery period, and the communication device (UE) calls the Discovery message (discovery) within the resource pool. Signal). More specifically, there are Type 1 and Type 2b. In Type 1, the communication device autonomously selects a transmission resource from the resource pool. In Type 2b, quasi-static resources are allocated by higher layer signaling (for example, RRC signal).

As for “communication”, as shown in FIG. 2B, a resource pool for SCI (Sidelink Control Information)/data transmission is periodically set. The communication device on the transmission side notifies the reception side of the resource for data transmission (PSSCH resource pool) and the like by SCI using the resource selected from the control resource pool (PSCCH resource pool), and transmits the data by the resource for data transmission. Regarding “communication”, there are mode 1 and mode 2 in more detail. In mode 1, resources are dynamically allocated by (E)PDCCH ((Enhanced) Physical Downlink Control Channel) sent from the base station to the communication device. In mode 2, the communication device autonomously selects a transmission resource from the resource pool. For the resource pool, a predefined one is used such as being notified by SIB.

Also, Rel-14 has Mode 3 and Mode 4 in addition to Mode 1 and Mode 2. In Rel-14, it is possible to transmit SCI and data at the same time (in one subframe) in resource blocks adjacent in the frequency direction. Note that SCI may be referred to as SA (scheduling assignment).

The channel used for "discovery" is referred to as PSDCH (Physical Sidelink Discovery Channel), and the channel for transmitting control information such as SCI in "communication" is referred to as PSCCH (Physical Sidelink Control Channel) for transmitting data. It is called PSSCH (Physical Sidelink Shared Channel). The PSCCH and PSSCH have a PUSCH-based structure, and have a structure in which DMRS (Demodulation Reference Signal, demodulation reference signal) is inserted.

As shown in FIG. 3, a MAC (Medium Access Control) PDU (Protocol Data Unit) used for a side link is composed of at least a MAC header, a MAC Control element, a MAC SDU (Service Data Unit), and a padding. The MAC PDU may include other information. The MAC header is composed of one SL-SCH (Sidelink Shared Channel) subheader and one or more MAC PDU subheaders.

As shown in FIG. 4, the SL-SCH subheader is composed of a MAC PDU format version (V), transmission source information (SRC), transmission destination information (DST), reserved bit (R), and the like. V is assigned to the beginning of the SL-SCH subheader and indicates the MAC PDU format version used by the communication device. Information related to the transmission source is set in the transmission source information. An identifier regarding the ProSe UE ID may be set in the source information. Information regarding the destination is set in the destination information. Information related to the destination ProSe Layer-2 Group ID may be set in the destination information.

Figure 5 shows an example of the side link channel structure. As shown in FIG. 5, a PSCCH resource pool and a PSSCH resource pool used for “communication” are allocated. Also, the PSDCH resource pool used for “discovery” is allocated at a cycle longer than the cycle of the “communication” channel.

Also, PSSS (Primary Sidelink Synchronization signal) and SSSS (Secondary Sidelink synchronization signal) are used as side link synchronization signals. Also, for example, a PSBCH (Physical Sidelink Channel) for transmitting broadcast information (broadcast information) such as a side link system band, a frame number, and resource configuration information for out-of-coverage operation is used. PSSS/SSSS and PSBCH are transmitted in one subframe, for example. PSSS/SSSS may be referred to as SLSS.

Note that V2X assumed in this embodiment is a method related to “communication”. However, in the present embodiment, the distinction between “communication” and “discovery” may not exist. Further, the technique according to the present embodiment may be applied in “discovery”.

(System configuration)
FIG. 6 is a diagram showing a configuration example of the wireless communication system according to the present embodiment. As shown in FIG. 6, the wireless communication system according to this embodiment includes a base station 10, a communication device 20A, and a communication device 20B. Although there may be many communication devices in practice, FIG. 6 shows the communication device 20A and the communication device 20B as an example.

In FIG. 6, the communication device 20A is intended to be the transmitting side and the communication device 20B is intended to be the receiving side, but both the communication device 20A and the communication device 20B have both a transmitting function and a receiving function. Hereinafter, the communication devices 20A, 20B and the like will be simply referred to as “communication device 20” or “communication device” unless otherwise distinguished. In FIG. 6, as an example, the case where both the communication devices 20A and 20B are within the coverage is shown, but the operation in the present embodiment is performed when all the communication devices 20 are within the coverage and a part of the case. It is applicable to both the case where the communication device 20 is within the coverage and the other communication device 20 is out of the coverage, and the case where all the communication devices 20 are out of the coverage.

In the present embodiment, the communication device 20 is a device installed in a vehicle such as an automobile, and has a cellular communication function as a UE in LTE or NR and a side link function. Furthermore, the communication device 20 includes a GPS device, a camera, various sensors, and the like, and a function of acquiring report information (position, event information, and the like). The communication device 20 may be a general mobile terminal (smartphone or the like). Further, the communication device 20 may be an RSU. The RSU may be a UE type RSU having a UE function, a BS type RSU having a base station function (may be referred to as a gNB type UE), or a relay station.

Note that the communication device 20 does not have to be a device in one housing, and for example, even when various sensors are dispersedly arranged in the vehicle, the device including the various sensors is the communication device 20. Further, the communication device 20 may have a function of transmitting and receiving data to and from various sensors, without including the various sensors.

Also, the processing content of the side link transmission of the communication device 20 is basically the same as the processing content of the UL transmission in LTE or NR. For example, the communication device 20 scrambles the codeword of the transmission data, modulates the codeword to generate complex-valued symbols, maps the complex-valued symbols (transmission signal) to one or two layers, and performs precoding. Then, the precoded complex-valued symbols are mapped to resource elements to generate a transmission signal (eg, CP-OFDM, DFT-s-OFDM) and transmit from each antenna port.

Regarding the base station 10, a function of cellular communication as the base station 10 in LTE or NR and a function for enabling communication of the communication device 20 in the present embodiment (eg, resource pool setting, resource allocation) Etc.). Further, the base station 10 may be an RSU (gNB type RSU), a relay station, or a communication device having a scheduling function.

In the wireless communication system according to the present embodiment, the signal waveform used by communication device 20 for SL or UL may be OFDMA, SC-FDMA, or other signal waveform. It may be. Further, in the wireless communication system according to the present embodiment, as an example, a frame composed of a plurality of subframes (eg, 10 subframes) is formed in the time direction, and a plurality of subcarriers is formed in the frequency direction. Become. One subframe is an example of one transmission time interval (TTI: Transmission Time Interval). However, the TTI is not always a subframe. For example, the TTI may be slot or mini-slot, or any other unit of the time domain. Further, the number of slots per subframe may be determined according to the subcarrier interval. Further, the number of symbols per slot may be 14 symbols.

In the present embodiment, the communication device 20 has a mode 1 in which resources are dynamically allocated by (E)PDCCH ((Enhanced) Physical Downlink Control Channel) sent from the base station 10 to the communication device, and the communication device is autonomous. 2, which is a mode in which transmission resources are selected from the resource pool, a mode in which resources for SL signal transmission are allocated from the base station 10 (hereinafter, referred to as mode 3), resources for SL signal transmission autonomously Any of the modes for selecting (hereinafter referred to as mode 4) can be used. The mode is set from the base station 10 to the communication device 20, for example.

As shown in FIG. 7, the communication device in mode 4 (shown as UE in FIG. 7) selects a wireless resource from the synchronized common time/frequency grid. For example, the communication device 20 performs sensing in the background, identifies a resource that has a good sensing result and is not reserved in another communication device as a candidate resource, and uses the resource from the candidate resource for transmission. Select.

(Outline of NR V2X)
In NR V2X, the same transmission modes as SL transmission mode 3 and SL transmission mode 4, which are defined in LTE V2X, are defined.

Hereinafter, an outline of the transmission mode defined by the V2X of NR will be described with reference to FIGS. 8A to 8D.

FIG. 8A is a diagram showing an outline of SL transmission mode 1 defined by V2X of NR. The SL transmission mode 1 specified by V2X of NR corresponds to the SL transmission mode 3 specified by V2X of LTE. In SL transmission mode 1 defined by V2X of NR, the base station 10 schedules transmission resources and allocates the transmission resources to the communication device 20A on the transmission side. The communication device 20A transmits the signal to the communication device 20B on the receiving side by the assigned transmission resource.

8B, 8C, and 8D are diagrams showing an outline of SL transmission mode 2 defined by NR V2X. The SL transmission mode 2 specified by V2X of NR corresponds to the SL transmission mode 4 specified by V2X of LTE.

FIG. 8B is a diagram showing an outline of the SL transmission mode 2a. In the SL transmission mode 2a, for example, the communication device 20A on the transmission side autonomously selects a transmission resource and transmits a signal to the communication device 20B on the reception side by the selected transmission resource.

FIG. 8C is a diagram showing an outline of the SL transmission mode 2c. In the SL transmission mode 2c, for example, the base station 10 presets a transmission resource of a fixed cycle to the communication device 20A, and the communication device 20A transmits a signal by the preset transmission resource of a fixed cycle. It is transmitted to the communication device 20B on the receiving side. Here, instead of the base station 10 setting transmission resources of a constant period in advance for the communication device 20A, transmission resources of a constant period are set in advance for the communication device 20A according to specifications, for example. May be.

FIG. 8D is a diagram showing an outline of the SL transmission mode 2d. In the SL transmission mode 2d, for example, the communication device 20 performs the same operation as the base station 10. Specifically, the communication device 20 schedules transmission resources and allocates the transmission resources to the communication device 20A on the transmission side. The communication device 20A may transmit to the communication device 20B on the receiving side according to the allocated communication resource. That is, the communication device 20 may control transmission of another communication device 20.

Also, in NR, as shown in FIGS. 9A to 9C, three types of communication, unicast, group cast, and broadcast, are currently under consideration as the types of communication.

FIG. 9A is a diagram showing an example of unicast Physical Sidelink Shared Channel (PSCCH)/Physical Sidelink Control Channel (PSSCH) transmission. Unicast means, for example, one-to-one transmission from the communication device 20A on the transmission side to the communication device 20B on the reception side.

FIG. 9B is a diagram showing an example of group cast PSCCH/PSSCH transmission. The group cast refers to, for example, transmission from the communication device 20A on the transmission side to the communication device 20B and the communication device 20B′, which is a group of the communication device 20 on the reception side.

FIG. 9C is a diagram showing an example of broadcast PSCCH/PSSCH transmission. Broadcast means, for example, transmission from the communication device 20A on the transmission side to all the communication devices 20 on the reception side within a predetermined range, that is, the communication devices 20B, 20B′, and 20B″.

NR-V2X is supposed to support more reliable communication compared to LTE-V2X. This is because it is assumed that the NR-V2X use case supports automatic driving and the like, and it is necessary to improve the reliability of communication. In order to improve the reliability of communication, it is considered to support HARQ feedback and CSI feedback in NR-V2X.

When performing such highly reliable communication, it is considered that the communication device 20 has more opportunities to perform communication.

In NR-V2X and LTE-V2X, the communication device 20 communicates in a half duplex mode. In other words, the communication device 20 cannot perform reception when transmitting, and cannot perform transmission when receiving. Here, this problem is called the half-duplex problem. Particularly, in NR-V2X, it is necessary to improve the reliability of communication, and it is necessary to solve the problem of half duplex.

By simultaneously using NR side link communication and LTE side link communication, the half-duplex problem can be solved (Fig. 10). Here, "simultaneous" in the case of simultaneously using NR side link communication and LTE side link communication means (1) NR side link communication and LTE side link communication. , When the communication is performed at exactly the same timing, when (2) NR side link communication and LTE side link communication overlap at least for one unit time (for example, 1 symbol), (3) NR Although the side link communication and the LTE side link communication are performed in the same slot, the same subframe, or the same radio frame, the timing at which the NR side link communication is performed is the LTE side. When it is earlier than the timing at which link communication is performed, and (4) NR side link communication and LTE side link communication are performed in the same slot, the same subframe, or the same radio frame. However, it does not matter whether the timing at which the LTE side link communication is performed is earlier than the timing at which the NR side link communication is performed.

In the following description, it is assumed that the communication device 20 can simultaneously use the NR side link communication and the LTE side link communication. The communication device 20 may individually have both the NR transceiver device and the LTE transceiver device, or alternatively, the communication device 20 may be one transceiver that combines the NR transceiver device and the LTE transceiver device. It may have a device. The mounting method of the communication device 20 is not particularly limited in this specification.

When the communication device 20 is transmitting on the NR side link, the communication device 20 may be expected to be able to receive a signal transmitted from another communication device 20 on the LTE side link. That is, when the communication device 20 is receiving on the LTE side link and the communication device 20 needs to transmit data, the transmission resource is selected from the NR side link resources and transmitted. May be.

When the communication device 20 is transmitting on the LTE side link, the communication device 20 may be expected to be able to receive a signal transmitted from another communication device 20 on the NR side link. That is, when the communication device is receiving on the NR side link and the communication device 20 needs to transmit data, the transmission resource is selected from the LTE side link resources and transmitted. Good.

Here, the LTE side link communication and the NR side link communication by the communication device 20 may be frequency-multiplexed. That is, the frequency band used for the LTE side link communication by the communication device 20 may be different from the frequency band used for the NR side link communication by the communication device 20. Further, the frequency band of the resource pool for transmission of the LTE side link by the communication device 20 may be different from the frequency band of the resource pool for transmission of the NR side link by the communication device 20.

FIG. 11 shows an example of a case where the communication device 20A and the communication device 20B perform full-duplex communication using LTE side-link communication and NR side-link communication.

Here, if the communication device 20A and the communication device 20B simultaneously transmit (or receive) on the NR side link, full-duplex communication cannot be performed. Similarly, when the communication device 20A and the communication device 20B simultaneously perform transmission (or reception) on the LTE side link, full-duplex communication cannot be performed.

Therefore, in order to realize full-duplex communication between the communication device 20A and the communication device 20B, State P and State Q shown in FIG. 12 are defined.

As shown in FIG. 12, State P is in a state of receiving on the NR side link and simultaneously transmitting on the LTE side link. State Q is a state in which transmission is performed on the NR side link and at the same time reception is performed on the LTE side link. By defining State P and State Q in this way, for example, when the communication device 20A and the communication device 20B communicate as shown in FIG. 11, the state of the communication device 20A is set to State P. By setting the state of the communication device 20B to State Q at the same time (or setting the state of the communication device 20A to State Q and at the same time, setting the state of the communication device 20B to State P) Duplex communication can be realized. That is, by setting the state of the communication device 20A and the state of the communication device 20B to be different from each other, full-duplex communication can be realized.

Here, as one option, whether to set the state of the communication device 20 to State P or State Q may be set in advance.

As another option, when the communication device 20A and the communication device 20B communicate with each other, the state may be set according to the size of the User Equipment Identifier (UE ID). For example, the state of the communication device 20 with the smaller UE ID may be set to State Q, and the state of the communication device 20 with the larger UE ID may be set to State P.

As another example, when the communication device 20A and the communication device 20B communicate with each other, the state may be set depending on whether or not the terminal starts communication. For example, the state of the communication device 20 that starts communication may be set to State Q, and the state of the other communication device 20 may be set to State P.

As yet another example, when the communication device 20A and the communication device 20B are in the same state and the communication device 20A transmits to the communication device 20B, one of the states may be changed. For example, you may change only the state of the communication apparatus 20 which transmits.

As another example, it is conceivable to set priorities among a plurality of RATs (for example, NR and LTE) and preferentially allocate the RAT with a higher priority to transmission. For example, in the case where the priority of NR is high and the priority of LTE is low, the policy that NR is preferentially assigned to transmission and LTE is assigned to reception is set as State P, and the assignment policy based on the opposite priority is State. Q may be set to either state in the communication device 20. In this case, if it is necessary to transmit simultaneously in both LTE and NR, such operation may be allowed.

As a use case when State P and State Q are defined in this way, as shown in FIG. 13, it is possible to use full-duplex communication for control when multiple vehicles perform platooning. To be As shown in FIG. 13, by setting the state of the front vehicle and the state of the rear vehicle to be different from each other, full-duplex communication can be performed between the front vehicle and the rear vehicle. Becomes

(Modification)
In the above embodiment, State P and State Q are defined as fixed states. However, the embodiment of the present invention is not limited to this embodiment. As shown in FIG. 14, for example, for each slot (for each unit time) in units of slots, for State P, (LTE: transmission, NR: reception), (LTE: reception, NR: transmission) , (LTE: transmission, NR: reception), ..., and for State Q, (LTE: reception, NR: transmission), (LTE: transmission, NR: reception), (LTE: reception, NR: Send), ..., may be switched. That is, State P and State Q may be switched so as to be opposite to each other for each slot. Here, the unit time for switching is not limited to one slot, and for example, a plurality of slots may be set as the unit time. Also, the unit time of switching may be dynamically set by higher layer signaling or the like, or may be set in advance.

Unicast and groupcast are not supported in LTE, only NR supports unicast and groupcast. By switching the state of State P and State Q for each unit time as in the above-mentioned modified example, it is possible to equalize the chances of performing unicast and group cast among multiple communication devices 20. ..

In addition, for example, when the communication device 20A and the communication device 20B perform full-duplex communication by using the LTE side link and the NR side link at the same time as in the above-described example, the communication device 20A and the communication device 20B The transmission confirmation information (HARQ-ACK) can be transmitted as follows.

The communication device 20A may receive, for example, the data transmitted from the communication device 20B via the LTE side link, and transmit the delivery confirmation information (ACK/NACK) regarding this data via the NR side link. Further, for example, when the communication device 20B receives the NACK from the communication device 20A on the NR side link, the communication device 20B may retransmit the data on the LTE side link.

Further, the communication device 20A may receive, for example, the data transmitted from the communication device 20B on the NR side link, and transmit the delivery confirmation information regarding this data on the LTE side link. Further, for example, when the communication device 20B receives a NACK from the communication device 20A on the LTE side link, the communication device 20B may retransmit the data on the NR side link.

With this method, it is possible to send the delivery confirmation information and retransmit the data at an earlier timing than in the case of half-duplex communication.

(Device configuration)
Next, a functional configuration example of the base station 10 and the communication device 20 that execute the processing operation described above will be described.

<Base station 10>
FIG. 15 is a diagram showing an example of the functional configuration of the base station 10. As illustrated in FIG. 15, the base station 10 includes a transmission unit 101, a reception unit 102, a setting information management unit 103, and a control unit 104. The functional configuration shown in FIG. 15 is merely an example. As long as the operation according to the present embodiment can be executed, any name may be used for the function classification and the function part. The transmitter 101 may be called a transmitter and the receiver 102 may be called a receiver.

The transmitting unit 101 includes a function of generating a signal to be transmitted to the communication device 20 side and wirelessly transmitting the signal. The receiving unit 102 includes a function of receiving various signals transmitted from the communication device 20 and acquiring, for example, information of a higher layer from the received signals. Further, the receiving unit 102 includes a function of measuring a received signal and acquiring a quality value.

The setting information management unit 103 stores preset setting information, setting information received from the communication device 20, and the like. The setting information related to transmission may be stored in the transmission unit 101, and the setting information related to reception may be stored in the reception unit 102. The control unit 104 controls the base station 10. The function of the control unit 104 related to transmission may be included in the transmission unit 101, and the function of the control unit 104 related to reception may be included in the reception unit 102.

For example, the setting information management unit 103 may include setting information for setting the state of each communication device 20 to State P or State Q. For example, when full-duplex communication is performed between the communication device 20A and the communication device 20B, the control unit 104 sets the state of the communication device 20A to State P and the setting information for setting the state of the communication device 20B to State Q. The transmission unit 101 may transmit the setting information together with the scheduling information to the communication device 20A and/or the communication device 20B.

<Communication device 20>
FIG. 16 is a diagram showing an example of a functional configuration of the communication device 20. As shown in FIG. 16, the communication device 20 includes a transmission unit 201, a reception unit 202, a setting information management unit 203, and a control unit 204. The functional configuration shown in FIG. 16 is merely an example. As long as the operation according to the present embodiment can be executed, any name may be used for the function classification and the function part. The transmitter 201 may be referred to as a transmitter and the receiver 202 may be referred to as a receiver. The communication device 20 may be the communication device 20A on the transmission side or the communication device 20B on the reception side.

The transmitting unit 201 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal. The receiving unit 202 wirelessly receives various signals and acquires signals of higher layers from the received physical layer signals. In addition, the receiving unit 202 includes a function of measuring a received signal and acquiring a quality value.

The setting information management unit 203 stores preset setting information, setting information received from the base station 10, and the like. The setting information related to transmission may be stored in the transmission unit 201, and the setting information related to reception may be stored in the reception unit 202. The control unit 204 controls the communication device 20. The function of the control unit 204 related to transmission may be included in the transmission unit 201, and the function of the control unit 204 related to reception may be included in the reception unit 202.

Note that the transmission unit 201 creates a transmission signal from transmission data and transmits the transmission signal via the LTE side link. Further, the transmission unit 201 creates a transmission signal from the transmission data and transmits the transmission signal by the NR side link. Further, the reception unit 202 receives the data transmitted via the LTE side link. Further, the receiving unit 202 receives the data transmitted by the NR side link.

Also, at the same time that the transmission unit 201 transmits data on the LTE side link, the reception unit 202 receives data on the NR side link. Furthermore, at the same time that the transmission unit 203 transmits data on the NR side link, the reception unit 202 receives data on the LTE side link.

For example, the control unit 204 sets the state of the communication device 20 to State P or State Q based on the setting information that the receiving unit 202 receives from the base station 10 and sets the state of the communication device 20 to State P or State Q. You may set it. Further, when the states of State P and State Q are set to be switched temporally, the control unit 204 may temporally switch the state of the communication device 20 according to State P or State Q. ..

<Hardware configuration>
The block diagrams (FIGS. 15 to 16) used in the description of the above embodiment show functional unit blocks. These functional blocks (components) are realized by an arbitrary combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device physically or logically coupled, or directly or indirectly (for example, two or more devices physically or logically separated). , Wired, wireless, etc.) and may be implemented using these multiple devices. The functional block may be implemented by combining the one device or the plurality of devices with software. Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, observation, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but not limited to these. I can't. For example, a functional block (structural unit) that causes transmission to function is called a transmitting unit or a transmitter. In any case, as described above, the implementation method is not particularly limited.

Further, for example, both the communication device 20 and the base station 10 according to the embodiment of the present invention may function as a computer that performs the processing according to the present embodiment. FIG. 17 is a diagram showing an example of the hardware configuration of the communication device 20 and the base station 10 according to the present embodiment. Each of the communication device 20 and the base station 10 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. Good.

Note that in the following description, the word "device" can be read as a circuit, device, unit, or the like. The hardware configurations of the communication device 20 and the base station 10 may be configured to include one or a plurality of each of the devices 1001 to 1006 shown in the figure, or may be configured without including some devices. May be.

Each function in the communication device 20 and the base station 10 causes a predetermined software (program) to be loaded on hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs an operation and controls communication by the communication device 1004. Or controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.

The processor 1001 operates an operating system to control the entire computer, for example. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, the baseband signal processing unit 104 and the call processing unit 105 described above may be realized by the processor 1001.

Further, the processor 1001 reads a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least part of the operations described in the above-described embodiments is used. For example, the control unit 204 of the communication device 20 may be implemented by a control program stored in the memory 1002 and operating in the processor 1001, and may be implemented similarly for other functional blocks. Although it has been described that the various processes described above are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via an electric communication line.

The memory 1002 is a computer-readable recording medium, and is configured by at least one of, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be done. The memory 1002 may be called a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code) that can be executed to implement the wireless communication method according to the embodiment of the present disclosure, a software module, and the like.

The storage 1003 is a computer-readable recording medium, for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, a Blu-ray disc). (Registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. The storage 1003 may be called an auxiliary storage device. The above-mentioned storage medium may be, for example, a database including at least one of the memory 1002 and the storage 1003, a server, or another appropriate medium.

The communication device 1004 is hardware (transmission/reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD). May be composed of For example, the transmission/reception antenna 101, the amplifier unit 102, the transmission/reception unit 103, the transmission path interface 106, and the like described above may be realized by the communication device 1004. The transmitter/receiver 103 may be physically or logically separated from the transmitter 103a and the receiver 103b.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses for each device.

Further, the communication device 20 and the base station 10 respectively include a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), etc. It may be configured to include hardware, and the hardware may implement some or all of the functional blocks. For example, the processor 1001 may be implemented using at least one of these hardware.

(Summary of Embodiments)
In this specification, at least the following communication device and communication method are disclosed.

The first setting in which the side link is transmitted by the first communication method and the side link is received by the second communication method at the same time, and the side link is transmitted by the second communication method at the same time Control unit for selecting one of the second settings for receiving the side link by the communication method, a transmission unit for transmitting the side link according to the setting selected by the control unit, and the control A receiving unit that receives a side link according to the setting selected by the unit.

According to the above configuration, according to the setting selected by the control unit, for example, when the communication device is transmitting on the NR side link, the communication device is a signal transmitted from another communication device on the LTE side link. To receive. Further, for example, when the communication device is transmitting on the LTE side link, the communication device receives a signal transmitted from another communication device on the NR side link. With this configuration, full-duplex communication can be performed on the side link.

The first communication method may be a Long Term Evolution (LTE) communication method, and the second communication method may be a New Radio (NR) communication method.

The control unit changes the selected setting in response to detecting that the selected setting and the setting applied to the transmission unit and the reception unit of the communication device of the communication partner are the same. Good. According to this configuration, the communication device and another communication device simultaneously perform transmission (or reception) with the NR side link, or the communication device and another communication device 2 simultaneously transmit with the LTE side link. Since (or reception) can be prevented, full-duplex communication on the side link can be efficiently performed.

The control unit may switch the selected setting at predetermined time intervals.

Unicast and groupcast are not supported in LTE, only NR supports unicast and groupcast. As in the above configuration, by switching the communication method applied by the transmission unit and the communication method applied by the reception unit at every predetermined time interval, there is an opportunity to perform unicast and group cast between a plurality of communication devices. It is possible to make them even.

When the control unit selects the first setting, the transmission unit sets delivery confirmation information for data received by the reception unit on the side link based on the second communication system to the first communication system. Based on the data received by the side link based on the first communication method when the control unit selects the second setting. The delivery confirmation information may be transmitted by side link based on the second communication method.

According to the above configuration, it becomes possible to transmit the delivery confirmation information and retransmit the data at an earlier timing than in the case of half-duplex communication.

The first setting in which the side link is transmitted by the first communication method and the side link is received by the second communication method at the same time, and the side link is transmitted by the second communication method at the same time Of the second setting for receiving the side link in the communication method of, the step of selecting any one of the settings, and the step of transmitting the side link according to the selected setting and receiving the side link at the same time, A communication method using a communication device having a. With this configuration, full-duplex communication can be performed on the side link.

(Supplement to the embodiment)
Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art can understand various modifications, modifications, alternatives, and substitutions. Ah Although specific numerical examples have been described to facilitate understanding of the invention, unless otherwise specified, those numerical values are merely examples and any appropriate values may be used. The division of items in the above description is not essential to the present invention, items described in two or more items may be used in combination as necessary, and items described in one item may be different items. It may apply to the matters described in (as long as there is no conflict). The boundaries of the functional units or the processing units in the functional block diagram do not always correspond to the boundaries of physical parts. The operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by the plurality of components. Regarding the processing procedures described in the embodiments, the order of processing may be changed as long as there is no contradiction. Although the communication device 20 and the base station 10 have been described using functional block diagrams for convenience of processing description, such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor included in the communication device 20 according to the embodiment of the present invention and the software operated by the processor included in the base station 10 according to the embodiment of the present invention are respectively a random access memory (RAM), a flash memory, and a read-only memory. It may be stored in a memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

The notification of information is not limited to the aspect/embodiment described in the present disclosure, and may be performed using another method. For example, information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, Notification information (MIB (Master Information Block), SIB (System Information Block))), other signals, or a combination thereof may be used. Further, the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.

Each aspect/embodiment described in the present disclosure is LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system). system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark) )), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), other systems using appropriate systems, and extensions based on these. It may be applied to at least one of the next-generation systems. Also, a plurality of systems may be combined and applied (for example, a combination of at least one of LTE and LTE-A and 5G).

The order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps in a sample order, and are not limited to the specific order presented.

The specific operation that is performed by the base station 10 in the present disclosure may be performed by its upper node in some cases. In a network including one or a plurality of network nodes having the base station 10, various operations performed for communication with a terminal include the base station 10 and other network nodes other than the base station 10 (for example, , MME or S-GW, etc., but are not limited to these). Although the case where there is one network node other than the base station 10 has been illustrated above, a combination of a plurality of other network nodes (for example, MME and S-GW) may be used.

Information that has been input and output may be stored in a specific location (for example, memory), or may be managed using a management table. Information that is input/output may be overwritten, updated, or added. The output information and the like may be deleted. The input information and the like may be transmitted to another device.

The determination may be performed by a value represented by 1 bit (whether 0 or 1), may be performed by a true/false value (Boolean: true or false), and may be performed by comparing numerical values (for example, a predetermined value). Value comparison).

Each aspect/embodiment described in the present disclosure may be used alone, in combination, or may be switched according to execution. Further, the notification of the predetermined information (for example, the notification of “being X”) is not limited to the explicit notification, and is performed implicitly (for example, the notification of the predetermined information is not performed). Good.

Software, whether called software, firmware, middleware, microcode, hardware description language, or any other name, instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules. , Application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc. should be construed broadly.

Also, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, the software uses a wired technology (coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and/or wireless technology (infrared, microwave, etc.) websites, When sent from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.

The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description include voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any of these. May be represented by a combination of

Note that the terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and the symbol may be a signal (signaling). The signal may also be a message.

The terms "system" and "network" used in this disclosure are used interchangeably. Further, the information, parameters, etc. described in the present disclosure may be represented by using an absolute value, may be represented by using a relative value from a predetermined value, or by using other corresponding information. May be represented. For example, the radio resources may be those indicated by the index.

-The names used for the above parameters are not limited in any way. Further, the formulas and the like that use these parameters may differ from those explicitly disclosed in this disclosure. Since different channels (eg PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the different names assigned to these different channels and information elements are in no way limited names. is not.

In the present disclosure, "base station (BS: Base Station)", "radio base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", " "Access point", "transmission point", "reception point", "transmission/reception point", "cell", "sector", "cell group", " The terms "carrier", "component carrier" and the like may be used interchangeably. A base station may be referred to by terms such as macro cell, small cell, femto cell, and pico cell.

A base station can accommodate one or more (eg, three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being defined by a base station subsystem (eg, indoor small base station (RRH: It is also possible to provide communication services by Remote Radio Head).The term "cell" or "sector" means a part or the whole coverage area of at least one of the base station and the base station subsystem that perform communication services in this coverage. Refers to.

In the present disclosure, terms such as “mobile station (MS: Mobile Station)”, “user terminal”, “user device (UE: User Equipment)”, and “terminal” may be used interchangeably. ..

Mobile stations are defined by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

At least one of the base station and the mobile station may be called a transmission device, a reception device, a communication device, or the like. Note that at least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like. The moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned type or unmanned type). ). At least one of the base station and the mobile station also includes a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

Also, the base station in the present disclosure may be replaced by the user terminal. For example, the communication between the base station and the user terminal is replaced with the communication between a plurality of user terminals (eg, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). Regarding the configuration, each aspect/embodiment of the present disclosure may be applied. In this case, the user terminal 20 may have the function of the base station 10 described above. In addition, the wording such as “up” and “down” may be replaced with the wording corresponding to the terminal-to-terminal communication (for example, “side”). For example, the uplink channel and the downlink channel may be replaced with the side channel.

Similarly, the user terminal in the present disclosure may be replaced by the base station. In this case, the base station 10 may have the function of the user terminal 20 described above.

The terms "connected," "coupled," or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and It can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled”. The connections or connections between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”. As used in this disclosure, two elements are in the radio frequency domain, with at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-exhaustive examples. , Can be considered to be “connected” or “coupled” to each other, such as with electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions.

The reference signal may be abbreviated as RS (Reference Signal), or may be referred to as Pilot depending on the applied standard.

As used in this disclosure, the phrase “based on” does not mean “based only on,” unless expressly specified otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

Where the use of "include", "including" and variations thereof in this disclosure, these terms are inclusive, as is the term "comprising." Is intended. Furthermore, the term "or" as used in this disclosure is not intended to be an exclusive or.

In the present disclosure, if translations add articles, such as a, an, and the in English, the present disclosure may include that nouns following these articles are in the plural.

In the present disclosure, the term “A and B are different” may mean “A and B are different from each other”. The term may mean that “A and B are different from C”. The terms "remove", "coupled" and the like may be construed similarly as "different".

Although the present invention has been described in detail above, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the claims. Therefore, the description of the present specification is for the purpose of exemplifying explanation, and does not have any restrictive meaning to the present invention.

101 transmitter 102 receiver 103 setting information manager 104 controller 201 transmitter 202 receiver 203 setting information manager 204 controller 1001 processor 1002 memory 1003 storage 1004 communication device 1005 input device 1006 output device

Claims (6)

The first setting in which the side link is transmitted by the first communication method and the side link is received by the second communication method at the same time, and the side link is transmitted by the second communication method at the same time A control unit that selects any one of the second settings for receiving the side link by the communication method of
A transmission unit that transmits a side link according to the setting selected by the control unit;
A receiving unit that receives the side link according to the setting selected by the control unit,
A communication device having. The first communication method is a Long Term Evolution (LTE) communication method, and the second communication method is a New Radio (NR) communication method.
The communication device according to claim 1. The control unit changes the selected setting in response to detecting that the selected setting and the setting applied to the transmission unit and the reception unit of the communication device of the communication partner are the same,
The communication device according to claim 1. The control unit switches the selected setting at predetermined time intervals,
The communication device according to claim 1. When the control unit selects the first setting, the transmission unit sets delivery confirmation information for data received by the reception unit on the side link based on the second communication system to the first communication system. Sidelink based on
When the control unit selects the second setting, the transmission unit sets delivery confirmation information for the data received by the reception unit on the side link based on the first communication system to the second communication system. Sidelink based on,
The communication device according to claim 1. The first setting in which the side link is transmitted by the first communication method and the side link is received by the second communication method at the same time, and the side link is transmitted by the second communication method at the same time A step of selecting any one of the second settings for receiving the side link by the communication method of
Transmitting side link according to the selected setting and receiving side link at the same time,
A communication method using a communication device having a.

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