CN112106405A - Communication device and base station - Google Patents

Fig. 20 is a diagram showing an example of a functional configuration of the

10 according to the embodiment.

Fig. 21 is a diagram showing an example of a functional configuration of the

20 according to the embodiment.

Fig. 22 is a diagram showing an example of the hardware configuration of the

10 and the

20 according to the embodiment.

Fig. 6 is a diagram showing a configuration example of the radio communication system according to the present embodiment. As shown in fig. 6, the radio communication system according to the present embodiment includes a

10, a

20A, and a

20B. In addition, although a plurality of communication apparatuses actually exist, fig. 6 shows a

20A and a

20B as an example.

In fig. 6, the

20A indicates a transmitting side and the

20B indicates a receiving side, but both the

20A and the

20B have both a transmitting function and a receiving function. Hereinafter, when the

20A, 20B and the like are not particularly distinguished, they are simply referred to as "

20", "communication device", "representative communication device", "non-representative communication device", and the like. In fig. 6, the case where both the

20A and the

20B are located within the coverage area is shown as an example, but the operation in the present embodiment can be applied to any case where all the

20 are located within the coverage area, where a part of the

20 are located within the coverage area and the other part of the

20 are located outside the coverage area, or where all the

20 are located outside the coverage area.

In the present embodiment, the

20 is a device mounted on a vehicle such as an automobile, for example, and has a function of cellular communication as UE in LTE or NR and a side link function. The

20 includes a function of acquiring report information (position, event information, and the like), such as a GPS device, a camera, various sensors, and the like. The

20 may be a general portable terminal (smart phone or the like). The

20 may be an RSU. The RSU may be a UE type RSU (UE type RSU) having a UE function, or a gbb type RSU (gbb type RSU) having a base station function.

The

20 does not need to be a 1-case device, and even when various sensors are disposed in a distributed manner in a vehicle, for example, a device including the various sensors is the

20. The

20 may not include various sensors, but may have a function of transmitting and receiving data to and from various sensors.

The processing contents of the side link transmission of the

20 are basically the same as those of the UL transmission in LTE or NR. For example, the

20 scrambles and modulates a codeword of transmission data to generate complex-valued symbols (complex-valued symbols), maps the complex-valued symbols (transmission signals) to

1 or layer 2, and performs precoding. Then, the precoded complex-valued symbols (precoded-valued symbols) are mapped to resource elements to generate a transmission signal (for example, complex-valued time-domain SC-FDMA signal) and transmitted from each antenna port.

The

10 has a function of cellular communication as the

10 in LTE or NR, and a function of enabling communication by the

20 in the present embodiment (for example, resource pool setting, resource allocation, and the like). Further, the

10 may be an RSU (gNB type RSU).

In the radio communication system according to the present embodiment, the signal waveform used by the

20 in SL or UL may be OFDMA, SC-FDMA, or another signal waveform. In the radio communication system according to the present embodiment, a frame including a plurality of subframes (for example, 10 subframes) is formed in the time direction, and a plurality of subcarriers are formed in the frequency direction, as an example. A 1 subframe or 1 slot is an example of a 1 Transmission Time Interval (TTI). A time length other than a subframe or a slot may also be used as the transmission time interval. In addition, the number of slots (slots) per 1 subframe may also be determined according to the subcarrier spacing. In addition, the number of symbols (symbols) per 1 slot may be 14 symbols.

In the present embodiment, the

20 can adopt either a mode in which resources for SL signal transmission are autonomously selected (hereinafter, referred to as mode4) or a mode in which resources for SL signal transmission are allocated from the base station 10 (hereinafter, referred to as mode 3). For example, the

10 sets a mode for the

20.

As shown in fig. 7, the mode4 communication apparatus (shown as a UE in fig. 7) selects a radio resource from a synchronized common time-frequency grid. For example, the

20 performs sensing (sensing) in the background (background), determines a resource having a good sensing result and not reserved by another communication device as a candidate resource, and selects a resource to be used for transmission from among the candidate resources.

As an example of communication using V2X, as shown in fig. 8, the following technique has been studied: the plurality of communication devices 20 (

20A to 20C in fig. 8) are grouped, and the

20B and 20C in the group transmit data (for example, data sensed by a sensor) to the

20A via the SL, and the

20A transmits the aggregated data to the

10 via the UL.

In S100, the

10 or the

20 determines a representative communication device. In S200, a non-representative communication apparatus belonging to the group of representative communication apparatuses is selected. In S300, the selected non-representative communication device or the like is notified of the selection. In the example described below, 1 representative communication apparatus exists in 1 group, but this is merely an example. There may be a plurality of representative communication apparatuses in 1 group.

The

20 may be located within the coverage area (In-coverage) of the

10, or may be located outside the coverage area (Out-of-coverage) of the

10. The representative communication device is basically a communication device that transmits data to the

10 or receives data from the

10, and therefore the communication device determined as the representative communication device may be limited to the

20 within the coverage (In-coverage). However, the representative communication device is not limited to the

20 within the coverage area (In-coverage), and the

20 outside the coverage area (Out-of-coverage) may be the representative communication device.

Example 1 for deciding a representative communication apparatus is explained with reference to fig. 10. As an example, fig. 10 shows an example in which the

20A to 20C exist and a representative communication device is determined from the

20A to 20C.

In S101 to S103, the

10 transmits or receives signals to or from each

20, and thereby grasps the received power (RSRP), the received quality (RSRQ, SINR) or the received strength (RSSI) of each

20. Any or all of the received power (RSRP), the received quality (RSRQ, SINR), or the received strength (RSSI) may be grasped. Since the reception power, the reception quality, and the reception strength are all quality-related values, the reception power, the reception quality, and the reception strength may be collectively referred to as "quality values". Further, "quality" may be used as "quality value".

For example, the

10 receives, from the

20A to 20C, received power (RSRP), received quality (RSRQ, SINR), or received strength (RSSI) measured by the

20A to 20C by receiving a DL signal or a SL signal, respectively, and thereby grasps the received power (RSRP), the received quality (RSRQ, SINR), or the received strength (RSSI) of each of the

20A to 20C.

Further, the

10 measures and grasps the received power (RSRP), the received quality (RSRQ, SINR), or the received strength (RSSI) of each of the

20A to 20C by receiving the UL signal or the SL signal transmitted from each of the

20A to 20C.

In S104, the

10 determines a representative communication apparatus based on the quality value grasped as described above.

For example, the

10 determines the

20 having the best quality value (for example, the communication device having the highest DL or UL received power) among the plurality of quality values obtained as the representative communication device. In addition, as described above, in the case where the concept of representing the communication apparatus is not used, here, a

20 is determined as the

20 having the best quality value.

In the example of fig. 10, it is assumed that the

20A is decided as the representative communication apparatus. In this case, for example, information indicating that the

20A is a representative communication device of the group is notified to the

20A to 20C (S105 to S107). In addition, in the case where the concept of the representative communication device is not used, here, information indicating that the

20A is selected as the initial member of the group (initial メンバー) may be notified. The notification in S105 to S107 may be performed by broadcast, RRC, MAC, or DCI, respectively. The notification in S105 to S107 may further include a group rnti (group rnti). Further, the notification of the decided representative communication apparatus may be performed only for the representative communication apparatus.

Next, an example 2 representing a method of determining a communication apparatus will be described with reference to fig. 11. In fig. 11, it is also assumed that a representative communication device is determined from among the

20A to 20C.

In S111 to S113 of fig. 11, each

20 receives the signal transmitted from each

20, and each

20 thereby grasps the received power (RSRP), the received quality (RSRQ, SINR) or the received strength (RSSI) of each

20. The UL signal or the SL signal transmitted from each

20 may be used for the measurement. Each

20 acquires the received power (RSRP), the received quality (RSRQ, SINR), or the received strength (RSSI) from the DL signal from the

10. Each

20 may receive, from the

10, received power (RSRP), received quality (RSRQ, SINR), or received strength (RSSI) measured by the

10 by receiving the UL signal. Any or all of the received power (RSRP), the received quality (RSRQ, SINR), or the received strength (RSSI) may also be grasped.

The reception power, reception quality, and reception strength measured by the communication device are collectively referred to as "SL quality value". In addition, the reception power, reception quality, and reception strength measured with the

10 are collectively referred to as "UL/DL quality value".

As shown in S114 to S119 in fig. 11, each

20 notifies each of the other communication devices of the SL quality value and the UL/DL quality value measured by itself. Thus, each communication device can grasp the SL quality value with the other communication device grasped by each other communication device, and the UL/DL quality value grasped by each other communication device.

Each

20 determines whether or not its own UL/DL quality value is optimal (for example, reception power is maximized) among the UL/DL quality values of each communication device that can be grasped, and determines that it is a representative communication device if it is optimal. In the example of fig. 11, a case is shown in which the

20A determines itself to be the representative communication device (S120). Further, each

20 may use the SL quality value in addition to or instead of the UL/DL quality value to decide whether or not it is a representative communication device. For example, each

20 determines that it is a representative communication device when the number of

20 that have obtained SL quality equal to or higher than a certain threshold value is the maximum.

The

20A notifies the

10 and the

20B and 20C of information indicating that the

20A is a representative communication device (S121 to S123).

Hereinafter, S200 (selection of a non-representative communication device) and S300 (notification to a selected communication device) shown in fig. 9 will be described in detail as

1 and 2.

In

1 and 2, it is assumed that a representative communication apparatus has been decided as a premise, but a non-representative communication apparatus belonging to the group of the representative communication apparatus has not been selected. In

1 and 2, a non-representative communication apparatus belonging to the group of representative communication apparatuses is selected. In

1 and 2, it is assumed that a representative communication apparatus is already determined, and a non-representative communication apparatus belonging to the group of the representative communication apparatuses is selected based on the relative position information and the like. In this case, the processing operations in

1 and 2 correspond to re-selecting, at shorter time intervals, non-representative communication apparatuses belonging to a group determined for each predetermined period (for example, a longer period such as 1 day) based on location information or the like, according to the radio situation. The number of the non-representative communication apparatuses belonging to the group may be plural or 1. The number of non-representative communication apparatuses to be measured for quality may be plural or 1.

In

1 and 2 described below, a communication apparatus is made to belong to a group when a predetermined condition a relating to a quality value is satisfied, but if the communication apparatus does not satisfy a predetermined condition B relating to a quality value, the communication apparatus is excluded from the group, and the communication apparatus or another apparatus (e.g., the

10 or another communication apparatus) is notified that the communication apparatus is excluded from the group. The predetermined condition a and the predetermined condition B may be the same or different. The determination to be excluded from the group and the processing sequence related to the notification may be the same as the determination to belong to the group and the processing sequence related to the notification (the processing sequences of

1 and 2 described below).

Further, group change may be performed. When the group change is to be performed again, the

10 or the communication device 20 (e.g., a representative communication device) notifies the

20 to which the group change is to be performed, for example, of information (e.g., a group index, or an index of a representative communication device of the group after the change, or a group index and an index of a representative communication device of the group after the change) specifying the group after the change. The determination of the change group (i.e., the determination of the

20 belonging to another group) and the processing sequence related to the notification may be the same as the determination of the group and the processing sequence related to the notification (the processing sequences of

1 and 2 described below). The

20 may measure a reference signal or the like transmitted from the

20 of the neighboring group, and the measurement result may be used for determination of group change.

First, example 1 will be described. In

1, a non-representative communication device is selected based on a quality value measured when the non-representative communication device transmits a reference signal and the representative communication device receives the reference signal. In

1, the reference signal used for measuring the quality value may be an SRS, may be a DM-RS, or may be another reference signal. Furthermore, a synchronization signal (SLSS) may also be used in the measurement of the quality value. The matters described below for the reference signal can also be applied to the synchronization signal.

Examples 1-1 to 1-3 will be described below with reference to fig. 12 to 14. In fig. 12 to 14, the

20A is a representative communication device, and the

20B and 20C are non-representative communication devices. In fig. 12 to 14, it is assumed that as the non-representative communication apparatus, there is a case where a communication apparatus other than the

20B and 20C is selected as a communication apparatus belonging to the group of the

20A (representative). For convenience of illustration, only the

20B and the

20C are shown as non-representative communication devices.

Example 1-1 is explained with reference to fig. 12. In S201 and S202, the

10 instructs the

20B and the

20C to transmit the reference signal. The indication may be made by any one of PBCH, RRC, MAC, or DCI.

Note that, as in S203 and S204 shown in fig. 12, instead of transmitting the reference signal transmission instruction from the

10, the

20A (representatively) may transmit the reference signal transmission instruction to the

20B and the

20C, or the

20A (representatively) may transmit the reference signal transmission instruction to the

20B and the

20C in addition to the transmission of the reference signal transmission instruction from the

10. This indication may be made by any of PSBCH, RRC, MAC, or SCI.

In S205, the

20B transmits a reference signal, and in S206, the

20C transmits a reference signal. The

20A (representative) measures the reception quality of the reference signal received from each

20 to obtain a quality value.

The transmission power used when the non-representative communication apparatus such as the

20B and 20C transmits the reference signal is specified by the

10 as a fixed value by PBCH, RRC, MAC, DCI, or the like, for example. The fixed value may be specified by the

20A (on behalf of) through PSBCH, MAC, RRC, or SCI. The fixed value may be included in the transmission instruction of the reference signal shown in S201 to S204. Further, the fixed value may be a value determined by a specification or the like or determined in advance.

The quality value measured by the

20A (representing) reception of the reference signal is, for example, any one or any plurality of path loss (Pathloss), RSRP, RSRQ, SINR, RSSI.

20A (typically) recognizes an antenna port at which the reference signal is received, a Resource (for example, SRI: SRS-Resource Index: SRS Resource Index) at which the reference signal is received, or a sequence of the received reference signal, and associates and holds the recognized information with a quality value corresponding to the information. The grasped information is an example of information associated with the

20 that transmitted the reference signal. The method of (representatively) grasping the transmission source of the reference signal (the

20 corresponding to the quality value) by the

20A is not limited to the antenna port, the resource, the sequence, and the like. For example, the reference signal may include identification information (ID or the like) of the

20, or another signal related to the reference signal may include identification information (ID or the like) of the

20.

In S207, the

20A (representative) selects, as the

20 belonging to the group of the

20A (representative), for example, 1 or

20 having quality values equal to or higher than a predetermined threshold value among the obtained quality values of the plurality of

20. For example, when obtaining the quality values of

20, the

20A (representative) may select

20 corresponding to the quality values of the upper N (N ≦ M) as the

20 belonging to the group. Further, for example, the

20A (representative) may select, as the

20 belonging to the group, a

20 having a quality value (for example, RSRP) of a predetermined threshold value B or more other than the path loss (Pathloss) among the plurality of

20 satisfying the condition that the path loss (Pathloss) is equal to or less than the predetermined threshold value a.

The reference for selecting the

20 belonging to the group may be notified from the

10 to a non-representative communication device such as the

20B and 20C by PBCH, RRC, MAC, DCI, or the like, or may be kept in advance by each

20 without such notification, for example, by specifying it in a specification.

In S301 and S302, the

20A (representative) notifies the

20B and the

20C of the selection result. In S303, the

20A (representative) notifies the

10 of the selection result. In embodiment 1-1, the notification of the selection result to the

10 may not be performed.

When the

20A (representative) notifies the

20B and the

20C of the selection result, any one of PSBCH, RRC, MAC, and SCI may be used. When the

20A (representative) notifies the

10 of the selection result, any one of RRC, MAC, and UCI may be used.

In the example of fig. 12, the information of the selection result of the notification includes the identification information of the

20B and the identification information of the

20C selected as the communication apparatuses belonging to the group of (representative) the

20A. However, the information of the selection result transmitted to

20B may include only the identification information of

20B out of the identification information of

20B and the identification information of

20C, and the information of the selection result transmitted to

20C may include only the identification information of

20B out of the identification information of

20B and the identification information of

20C.

The identification information of the

20 such as the

20B and 20C may be any information as long as it is information related to the

20. For example, the identification information of the

20 may be information of the antenna port, information of the resource, or information of the sequence described above.

When notifying that the selected

20 is selected, the

20A (representative) may transmit information obtained by masking the CRC with the RNTI of the communication apparatus 20 (mask). When the CRC check of the received information using the CRC masked (unmask) by its RNTI succeeds, the

20 on the reception side can determine that it is selected as the

20 belonging to the group.

In S217, the

20A (representative) transmits the measurement result obtained by measuring the reference signal received from each

20 to the

10. In the example of fig. 13, the measurement result contains at least a quality value obtained by measurement of the reference signal received from

20B, and a quality value obtained by measurement of the reference signal received from

20C, and identification information of

20 corresponding to the quality values.

In S218, the

10 selects the

20 belonging to the group of (representative)

20A, as in the selection method in S207 of embodiment 1-1 (fig. 12).

In S311, S312, and S313, the

10 transmits the selection result to the

20B, the

20A (representative), and the

20C.

When the

10 notifies the selection result to the

20B, the

20A (representative), and the

20C, any of PBCH, RRC, MAC, and DCI may be used. For example, when the notification is performed by broadcast such as PBCH, or when the notification is performed individually by DCI, the selection result information of the notification includes the identification information of

20B and the identification information of

20C, which are selected as communication apparatuses belonging to the group of (representative)

20A.

Further, as another example, when notification is performed by broadcast such as PBCH, identification information of

20B and identification information of

20C, which are selected as communication apparatuses belonging to a group of

20A (representative), may be included in the information of the selection result of notification, when individual notification is performed by DCI or the like, only identification information of the destination to be notified may be included in the information of the selection result for a non-representative communication apparatus, and identification information of

20B and identification information of

20C, which are selected as communication apparatuses belonging to the group, may be included in the information of the selection result for a representative communication apparatus.

As described in embodiment 1-1, the identification information may be any information as long as it is information related to the

20, and may be information of an antenna port, information of a resource, or information of a sequence, for example, of a reference signal from which the quality value of the

20 is obtained. In addition, when the individual notification is performed, the

10 may transmit information obtained by masking (mask) the CRC with the RNTI of the

20 to the

20.

In S321, the

10 transmits the selection result to the

20A (representative). The transmission method of the selected result is the same as S312 in embodiment 1-2 (fig. 13). In S322 and S323,

20A (representative) transmits the selection result to

20B and

20C. The transmission method of the selected result is the same as S301 and S302 in embodiment 1-1 (fig. 12).

Next, example 2 will be explained. In embodiment 2, the non-representative communication apparatus receives the reference signal transmitted from the representative communication apparatus, measures the reference signal, and transmits the obtained quality value to the representative communication apparatus or the

10 as a measurement report. The quality value is used on behalf of the communication device or

10 to select the

20 that belongs to the group. In embodiment 2, the reference signal used for measuring the quality value may be an SRS, may be a DM-RS, or may be another reference signal. In addition, a synchronization signal (SLSS) may also be used in the measurement of the quality value. The matters described below for the reference signal can also be applied to the synchronization signal.

Hereinafter, examples 2-1 to 2-5 will be described with reference to fig. 15 to 19. In fig. 15 to 19, the

20A is a representative communication device, and the

20B and 20C are non-representative communication devices, as in

1. In fig. 15 to 19, a case is assumed where the

20 is selected as the non-representative communication device in addition to the

20B and 20C, and the

20B and 20C are selected as the

20 belonging to the group of the

20A (representative). For convenience of illustration, only the

20B and the

20C are shown as non-representative communication devices.

Example 2-1 is explained with reference to fig. 15. In S221, S222, the

10 instructs the

20B and the

20C to measure the reference signal. The indication may be made by any one of PBCH, RRC, MAC, or DCI.

Note that, as in S223 and S224 shown in fig. 15, instead of transmitting the reference signal measurement instruction from the

10, the

20A (representatively) may transmit the reference signal measurement instruction to the

20B and the

20C, or the

20A (representatively) may transmit the reference signal measurement instruction to the

20B and the

20C in addition to the transmission of the reference signal measurement instruction from the

10. The indication may be made through any of PSBCH, RRC, MAC, or SCI.

In S225,

20A (representative) transmits a reference signal, and

20B measures the reception quality of the reference signal received from

20A (representative) and obtains a quality value. Similarly, in S226,

20A (representative) transmits a reference signal, and

20C measures the reception quality of the reference signal received from

20A (representative) and obtains a quality value.

The transmission power used when the representative communication apparatus such as the

20A transmits the reference signal can be specified by the

10 by PBCH, RRC, MAC, DCI, or the like, for example, as a fixed value.

The quality value measured by the non-representative communication apparatus such as the

20B, 20C through reception of the reference signal is, for example, any one or any plurality of path loss (Pathloss), RSRP, RSRQ, SINR, RSSI.

In S227, the

20B transmits the quality value obtained by measuring the reference signal received from the

20A (representative) to the

20A (representative) as a measurement report. In addition, the measurement report may be referred to as a CSI report. Likewise, in S228, the

20C transmits, to the

20A (representative), the quality value obtained by measuring the reference signal received from the

20A (representative) as a measurement report. The identification of the

20 by the

20A (representative) may be such that the measurement report includes identification information of the

20 that reports together with the quality value, or such that the

20A (representative) identifies the transmission source ID from the Signal (SCI) or the like used in the received measurement report.

Further, it may be that an identifier representing a reference signal used in quality measurement is included together with the quality value in the measurement report. When the

20A that transmits the reference signal using a plurality of beams, the identifier indicating the reference signal is also an identifier for identifying the beam since the reference signal is transmitted for each beam. Therefore,

20B (20C) includes the identifier indicating the reference signal used in the quality measurement together with the quality value in the measurement report, and

20A can determine which beam is the best based on the identifier and the quality value received as the measurement report. Further, when the

20B (20C) measures interference from communication devices of other groups by using the reference signal, the

20A can identify the group or the communication device causing the interference by including the identifier indicating the reference signal together with the quality value in the measurement report transmitted to the

20A. For example, in the above-described application of group change, the

20B (20C) measures the quality (for example, RSRP or RSRQ) of the communication device of another group by using the reference signal, and includes the identifier indicating the reference signal in the measurement report transmitted to the

20A together with the quality value, so that the

20A can identify the communication device of another group.

In S229, the

20A (representative) selects the

20 belonging to the group of the

20A (representative) based on the quality values received from the respective non-representative communication devices, as in S207 of embodiment 1-1. In the example of fig. 15, the

20B and the

20C are selected.

The method of notifying the selected result in example 2-1 is the same as that in example 1-1. That is, in S331 and S332, the

20A (representative) notifies the

20B and the

20C of the selection result. In S333, the

20A (representative) notifies the

10 of the selection result. In embodiment 2-1, the notification of the selection result to the

10 may not be performed.

In S237 and S238, the

20B and the

20C transmit the quality value obtained by measuring the reference signal received from (representative of) the

20A to the

10 as measurement reports. The measurement report includes, for example, identification information of the

20 as the transmission source together with the quality value. In addition, as in embodiment 2-1, an identifier indicating a reference signal used for quality measurement may be included in the measurement report together with the quality value.

In S239, the

10 selects the

20 belonging to the group of (representative)

20A, as in the selection method in S207 of embodiment 1-1 (fig. 12).

In S341, S342, and S343, the

10 transmits the selection result to the

20B, the

20A (representative), and the

20C. The method of notifying the selected result is the same as S311, S312, S313 in embodiment 1-2 (fig. 13).

In S351, the

10 transmits the selection result to the

20A (representative). The transmission method of the selected result is the same as S312 in example 1-2 (fig. 13). In S352 and S353, the

20A (representative) transmits the selection result to the

20B and the

20C. The transmission method of the selected result is the same as S301 and S302 in embodiment 1-1 (fig. 12).

In S269, the

20A (representative) transmits the quality value received from the

20B, 20C to the

10 as a measurement report. The measurement report includes, for example, the quality value received from

20B and the identification information of

20B, and the quality value received from

20C and the identification information of

20C. Further, as in embodiment 2-1, an identifier indicating a reference signal used in quality measurement may be included in the measurement report together with the quality value.

In S270, the

10 selects the

20 belonging to the group of (representative of) the

20A according to the method already described based on the received quality value. In addition, in S361 to S363, the selection result is notified, as in S351 to S353 of example 2-3.

In the above-described embodiments 2-1 to 2-5, the non-representative communication devices (e.g., the

20B and 20C) measure the quality value of SL with respect to the representative communication device (e.g., the

20A) and report it to the representative communication device or the

10. In addition to measuring and reporting the quality value of SL with the representative communication apparatus (example:

20A), the non-representative communication apparatuses (example:

20B and 20C) may measure the quality value of a reference signal (which may be a synchronization signal) received from a representative communication apparatus of another group (example: a group other than the group formed by

20A to 20C) or a non-representative communication apparatus belonging to another group, and report the measured quality value to the representative communication apparatus or the

10. As in the case of the embodiment 2-1, the measurement report may include an identifier indicating a reference signal used for quality measurement together with the quality value, as in the embodiment 2-1. By grasping the quality value for the other group, it is possible to make a determination that the

20 for which a better quality value for the other group is obtained does not belong to the group of the

20A.

As described above, in

1 and 2, the representative communication apparatus or the non-representative communication apparatus can use the reference signal in the quality measurement performed for the selection of the communication apparatus belonging to the group. Here, a detailed example of the SRS will be described as an example of a reference signal used for quality measurement. The matters described below can be applied not only to the SRS but also to the DM-RS or the synchronization signal.

For example, the non-representative communication apparatus can perform SRS transmission or measurement using an SRS resource or an SRS resource set (configuration) set for the representative communication apparatus. The SRS resource or SRS resource set to the non-representative communication apparatus may be set as the SRS resource or SRS resource set (configuration) in the representative communication apparatus set (configuration) to the non-representative communication apparatus by the representative communication apparatus or the

10, or the non-representative communication apparatus may receive the setting information (configuration information) of the SRS transmitted from the

10 to the representative communication apparatus, and grasp the SRS resource or SRS resource set (configuration) set to the representative communication apparatus based on the setting information.

For example, the

10 or the representative communication apparatus notifies the non-representative communication apparatus of the SRS port or the SRS resource (or the SRS port and the SRS resource), and the non-representative communication apparatus which has received the notification performs the SRS transmission (in the case of embodiment 1) or the SRS measurement (in the case of embodiment 2) by using the SRS port or the SRS resource (or the SRS port and the SRS resource).

For example, when

20A (representative) exists as a representative communication apparatus and

20B and 20C exist as non-representative communication apparatuses,

20B is instructed from

10 or

20A (representative) to

1 and is instructed from

10 or

20A (representative) to SRS port 2 and is instructed from

10 or

20A (representative) to SRS port to be used. In this case,

20B performs SRS transmission or SRS measurement using

1, and

20C performs SRS transmission or SRS measurement using SRS port 2.

For example,

20B is instructed from

10 or

20A (for representatives) of

1 as SRS resource (for example, time resource or frequency resource or time/frequency resource) to be used, and

20C is instructed from

10 or

20A (for representatives) of SRS resource 2 as SRS resource to be used. In this case,

20B performs SRS transmission or SRS measurement using

1, and

20C performs SRS transmission or SRS measurement using SRS resource 2.

For example, when

1 and SRS port 2 are set for

20A (representative) which is a representative communication apparatus,

20B uses

1 and

20C uses SRS port 2 as a result of random selection. For example, when

1 and SRS resource 2 are set for (representatively)

20A,

20B uses

1 and

20C uses SRS resource 2 as a result of random selection.

For example, when the index (index) of the

20B is 125311 and the last 3 bits are 311, the remainder is "2" obtained by dividing the index by 3, and the remainder is determined to be the identification number of the SRS port or the SRS resource to be used (or the SRS port and the SRS resource).

As described above, according to any of

1 and 2, it is possible to appropriately select a communication device belonging to a group representing communication devices and to notify the selected communication device of the selection result.

Next, a functional configuration example of the

10 and the

20 that execute the above-described processing operation will be described. The

10 and the

20 may have all the functions of the determination of the representative communication device described in the present embodiment and the functions of the embodiments 1-1 to 1-3 and 2-1 to 2-5, or may have only a part of the functions of the determination of the representative communication device and the embodiments 1-1 to 1-3 and 2-1 to 2-5. The

20 described below may operate as a representative communication device or may operate as a non-representative communication device.

Fig. 20 is a diagram showing an example of the functional configuration of the

10. As shown in fig. 20, the

10 includes a

101, a

102, a setting

103, and a

104. The functional configuration shown in fig. 20 is merely an example. The names of the function division and the function unit may be arbitrary as long as the operation according to the present embodiment can be performed. The

101 may be referred to as a transmitter, and the

102 may be referred to as a receiver.

The

101 includes a function of generating a signal to be transmitted to the

20 side and transmitting the signal wirelessly. The receiving

102 includes a function of receiving various signals transmitted from the

20 and acquiring, for example, higher layer information from the received signals. The

102 also includes a function of measuring a received signal to obtain a quality value.

The setting

103 stores preset setting information, setting information received from the

20, and the like. The setting information on transmission may be stored in the

101, and the setting information on reception may be stored in the

102. The

104 controls the

10. The function of the

104 related to transmission may be included in the

101, and the function of the

104 related to reception may be included in the

102.

For example, the receiving

103 is configured to receive a quality value from a specific communication device that measures quality values of signals received from at least 1 communication device, the

104 is configured to select a communication device belonging to a group based on the quality value received by the receiving unit, and the transmitting

101 is configured to notify the communication device selected by the control unit of a situation in which the communication device selected as belonging to the group is selected.

Further, the

102 may be configured to receive a quality value measured by reception of a signal in at least 1 communication device from the communication devices, the

104 may be configured to select a communication device belonging to the group based on the quality value received by the reception unit, and the

101 may be configured to notify the communication device selected by the control unit of a case where the communication device selected as belonging to the group is selected.

Further, the receiving

102 may be configured to receive, from at least 1 communication device, a quality value measured by reception of a signal in the communication device, the

104 may be configured to select a communication device belonging to a group based on the quality value received by the receiving unit, and the transmitting

101 may be configured to notify a specific communication device in the group of the communication device selected by the control unit.

The receiving

102 may be configured to receive, from a specific communication apparatus, a quality value measured by reception of a signal in at least 1 communication apparatus, the

104 may be configured to select a communication apparatus belonging to a group based on the quality value received by the receiving unit, and the transmitting

101 may be configured to notify the communication apparatus selected by the control unit of a case where the communication apparatus selected as the communication apparatus belonging to the group is selected.

<

20 >

Fig. 21 is a diagram showing an example of the functional configuration of the

20. As shown in fig. 21, the

20 includes a

201, a

202, a setting

203, and a

204. The functional configuration shown in fig. 21 is merely an example. The names of the function division and the function unit may be arbitrary as long as the operation according to the present embodiment can be performed. The

201 may be referred to as a transmitter, and the

202 may be referred to as a receiver.

The

201 generates a transmission signal from transmission data and wirelessly transmits the transmission signal. The

202 receives various signals wirelessly and acquires a higher layer signal from the received physical layer signal. The

202 also includes a function of measuring a received signal to obtain a quality value.

The setting

203 stores preset setting information, setting information received from the

10, and the like. The setting information on transmission may be stored in the

201, and the setting information on reception may be stored in the

202. The

204 controls the

20. The functions of the

204 related to transmission may be included in the

201, and the functions of the

204 related to reception may be included in the

202.

For example, the receiving

202 is configured to measure the quality values of signals received from at least 1 communication device, the

204 is configured to select a communication device belonging to a group based on the quality values measured by the receiving unit, and the transmitting

201 is configured to notify the communication device selected by the control unit of the fact that the communication device is selected as a communication device belonging to the group.

Further, the

202 may be configured to measure the quality values of signals received from at least 1 communication device, the

201 may be configured to transmit the quality values measured by the reception unit to a base station, the reception unit may receive identification information of a communication device selected as a communication device belonging to a group by the base station, and the transmission unit may notify the communication device selected as the communication device belonging to the group to the communication device selected by the base station.

Further, the

202 may be configured to receive, from at least 1 communication device, a quality value measured by reception of a signal in the communication device, the

204 may be configured to select a communication device belonging to a group based on the quality value received by the reception unit, and the

201 may be configured to notify the communication device selected by the control unit of a case where the communication device selected as the communication device belonging to the group is selected.

Further, the

202 may be configured to receive, from at least 1 communication device, a quality value measured by reception of a signal in the communication device, the

201 may be configured to transmit, to a base station, the quality value received by the reception unit, the reception unit may receive identification information of a communication device selected as a communication device belonging to a group by the base station, and the transmission unit may notify the communication device selected as the communication device belonging to the group to the communication device selected by the base station.

For example, both the

20 and the

10 according to one embodiment of the present invention can function as a computer that performs the processing according to the present embodiment. Fig. 22 is a diagram showing an example of the hardware configuration of the

20 and the

10 according to the present embodiment. The

20 and the

10 may be physically configured to include computer devices such as a

1001, a memory 1002(memory), a storage 1003(storage), a

1004, an

1005, an

1006, and a

1007.

In the following description, the term "device" may be replaced with "circuit", "device", "unit", and the like. The hardware configurations of the

20 and the

10 may include one or more of the

1001 to 1006 shown in the drawings, or may not include some of them.

The functions in the

20 and the

10 are realized by the following methods: when predetermined software (program) is read into hardware such as the

1001 and the

1002, the

1001 performs an operation to control communication of the

1004 and reading and/or writing of data from and/or to the

1002 and the

1003.

The

1001 operates, for example, an operating system to control the entire computer. The

1001 may be a Central Processing Unit (CPU) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.

Further, the

1001 reads out a program (program code), a software module, or data from the

1003 and/or the

1004 to the

1002, and executes various processes in accordance therewith. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiments is used. For example, the

101, the

102, the setting

103, and the

104 of the

10 shown in fig. 20 may be implemented by a control program stored in the

1002 and operated by the

1001. For example, the

201, the

202, the setting

203, and the

204 of the

20 shown in fig. 21 may be realized by a control program stored in the

1002 and operated by the

1001. Although the above various processes are described as being executed by one

1001, the above various processes may be executed by 2 or

1001 at the same time or sequentially. The

1001 may be implemented by 1 or more chips. In addition, the program may be transmitted from the network via a telecommunication line.

The

1002 is a computer-readable recording medium, and may be configured by at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), and the like.

1002 may also be referred to as registers, cache, main memory (primary storage), etc. The

1002 can store a program (program code), a software module, and the like that can be executed to implement the processing according to the embodiment of the present invention.

The

1003 is a computer-readable recording medium, and may be constituted by at least one of an optical disk such as a CD-rom (compact Disc rom), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact Disc, a digital versatile Disc, a Blu-ray (registered trademark) Disc, a smart card, a flash memory (for example, a card, a stick, a Key drive), a Floppy (registered trademark) Disc, a magnetic stripe, and the like.

The

1004 is hardware (a transmitting/receiving device) for performing communication between computers via a wired and/or wireless network, and may also be referred to as a network device, a network controller, a network card, a communication module, or the like. For example, the

201 and the

202 of the

20 may be realized by the

1004. The

101 and the

102 of the

10 may be implemented by the

1004.

The

1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a key, a sensor, and the like) that receives an input from the outside. The

1006 is an output device (for example, a display, a speaker, an LED lamp, or the like) that outputs to the outside. The

1005 and the

1006 may be integrally formed (for example, a touch panel).

The

1001 and the

1002 are connected to each other via a

1007 for communicating information. The

1007 may be constituted by a single bus or may be constituted by different buses between devices.

The

20 and the

10 may be configured to include hardware such as a microprocessor, a Digital Signal Processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), or the like, and a part or all of the functional blocks may be realized by the hardware. For example, the

1001 may be installed by at least one of these hardware.

With any of the configurations of

1 to 8 above, there is provided a technique capable of selecting a communication device belonging to a specific communication device group.

While the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and various modifications, alternatives, and substitutions will be apparent to those skilled in the art. Although specific numerical examples are used to facilitate understanding of the present invention, these numerical values are merely examples and any appropriate values may be used unless otherwise specified. The distinction of items in the above description is not essential to the present invention, and items described in two or more items may be used in combination as necessary, or items described in one item may be applied to items described in other items (as long as there is no contradiction). Boundaries of the functional units or the processing units in the functional block diagrams do not necessarily correspond to boundaries of the physical components. The operation of a plurality of (complex) functional units may be performed by one physical component, or the operation of one functional unit may be performed by a plurality of (complex) physical components. As for the processing procedure described in the embodiment, the order of processing may be changed without contradiction. For convenience of explanation of the process, the

20 and the

10 have been explained using functional block diagrams, but such apparatuses may also be implemented in hardware, in software, or a combination thereof. Software that operates by a processor provided in the

20 according to the embodiment of the present invention and software that operates by a processor provided in the

10 according to the embodiment of the present invention may be stored in a Random Access Memory (RAM), a flash memory, a Read Only Memory (ROM), an EPROM, an EEPROM, a register, a hard disk (HDD), a removable disk, a CD-ROM, a database, a server, or any other suitable storage medium.

In the present specification, it is assumed that the specific operation performed by the

10 is sometimes performed by an upper node (upper node) thereof, depending on the case. It is obvious that in a network including one or more network nodes (network nodes) having the

10, various operations performed for communication with the

20 can be performed by the

10 and/or other network nodes (for example, MME, S-GW, or the like is considered, but not limited thereto) other than the

10. In the above description, the case where there is one network node other than the

10 is exemplified, but a combination of a plurality of other network nodes (e.g., MME and S-GW) may be used.

With respect to the

20, it is sometimes referred to as a subscriber station, a mobile unit (mobile unit), a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent (user agent), a mobile client, a client, or some other suitable terminology, depending on the person skilled in the art.

The

10 is sometimes referred to by nb (nodeb), enb (enhanced nodeb), gNB, Base Station (Base Station), or some other suitable terminology, depending on the person skilled in the art.

1. A communication apparatus, wherein the communication apparatus has:

a receiving unit that measures the quality of a signal received from a communication device;

a control unit for selecting a communication device belonging to a group based on the quality measured by the reception unit; and

a transmission unit that notifies the communication device selected by the control unit of the communication device that has been selected as belonging to the group.

2. A base station, wherein the base station has:

a receiving unit that receives a quality of a signal received from a communication device from a specific communication device that measures the quality;

a control unit for selecting a communication device belonging to a group based on the quality received by the reception unit; and

a transmission unit that notifies the communication device selected by the control unit of the communication device that has been selected as belonging to the group.

3. A communication apparatus, wherein the communication apparatus has:

a receiving unit that measures the quality of a signal received from a communication device; and

a transmission unit that transmits the quality measured by the reception unit to a base station,

the receiving section receives identification information of a communication apparatus selected as a communication apparatus belonging to a group by the base station,

the transmitting unit notifies the communication device selected by the base station of the communication device that has been selected as belonging to the group.

4. A communication apparatus, wherein the communication apparatus has:

a reception unit that receives, from a communication device, a quality measured by reception of a signal in the communication device;

a control unit for selecting a communication device belonging to a group based on the quality received by the reception unit; and

a transmission unit that notifies the communication device selected by the control unit of the communication device that has been selected as belonging to the group.

5. A base station, wherein the base station has:

a reception unit that receives, from a communication device, a quality measured by reception of a signal in the communication device;

a control unit for selecting a communication device belonging to a group based on the quality received by the reception unit; and

a transmission unit that notifies the communication device selected by the control unit of the communication device that has been selected as belonging to the group.

6. A base station, wherein the base station has:

a reception unit that receives, from a communication device, a quality measured by reception of a signal in the communication device;

a control unit for selecting a communication device belonging to a group based on the quality received by the reception unit; and

and a transmitting unit that notifies the specific communication device in the group of the communication device selected by the control unit.