JP7059511B2 - Control device, antenna setting method and wireless system - Google Patents

Description

The present invention relates to a control device, an antenna setting method and a wireless system.

For example, as a ^5G (5th Generation) large-capacity wireless technology, there is a wireless system in which a base station uses a plurality of antennas to communicate with a plurality of mobile stations at the same time. The base station includes, for example, a V (Vertical) polarization antenna and an H (Horizontal) polarization antenna. The mobile station also includes, for example, at least one polarized antenna having a V-polarized antenna and an H-polarized antenna. When the mobile station uses an H-polarized antenna, the base station sets an H-polarized antenna that transmits and receives an H-polarized radio signal. Further, when the mobile station uses a V-polarized antenna, the base station sets a V-polarized antenna for transmitting and receiving a V-polarized radio signal. Therefore, the base station is provided with an antenna corresponding to both polarization methods in preparation for the polarization method of the mobile station.

Special Table 2003-520545 Gazette Japanese Unexamined Patent Publication No. 2002-33694 Japanese Patent Application Laid-Open No. 2002-64321

When the base station changes the combination of the polarized antennas according to the actual usage of the polarized antennas of the mobile station, the polarized antenna can be changed by the changing operation. As for the base station, for example, when many mobile stations use V-polarized antennas due to the change work, the number of V-polarized antennas used on the base station side is increased, and for example, many mobile stations use H-polarized antennas. In this case, the number of H-polarized antennas used on the base station side will be increased. However, the work load is heavy. Therefore, there is a demand for a base station that can automatically change the antenna used on the base station side according to the actual usage status of the antenna used on the mobile station side.

One aspect is to provide a control device, an antenna setting method, and a wireless system capable of changing the antenna used on the base station side according to the actual usage situation of the antenna on the mobile station side.

One aspect of the control device controls a base station that is wirelessly connected to the mobile station. The control device has a collecting unit, a determining unit, and a setting unit. The collecting unit collects reception quality information of each antenna type for each mobile station from the base station. The determination unit determines the usage ratio of the antenna type used in the base station based on the ratio of the reception quality information for each antenna type collected by the collection unit. The setting unit sets the usage ratio of the antenna type determined by the determination unit in the base station.

In one embodiment, the antenna used on the base station side can be changed according to the actual usage status of the antenna on the mobile station side.

FIG. 1 is an explanatory diagram showing an example of the wireless system of the first embodiment. FIG. 2 is a block diagram showing an example of the hardware configuration of the mobile station. FIG. 3 is an explanatory diagram showing an example of a first receiving unit, a first transmitting unit, and the like in the mobile station. FIG. 4 is a block diagram showing an example of the hardware configuration of the base station. FIG. 5 is an explanatory diagram showing an example of a second receiving unit, a second transmitting unit, and the like in the base station. FIG. 6 is a block diagram showing an example of the hardware configuration of the centralized control station. FIG. 7 is an explanatory diagram showing an example of the functional configuration of the third processor of the centralized control station. FIG. 8 is an explanatory diagram showing an example of a PUCCH format configuration to which reception quality information is added for each polarization method. FIG. 9 is an explanatory diagram showing an example of the processing operation of the wireless system when collecting the received power amount for each polarization method of the first embodiment. FIG. 10 is a flowchart showing an example of the processing operation of the mobile station related to the mobile station side report processing. FIG. 11 is a flowchart showing an example of the processing operation of the base station related to the base station side report processing. FIG. 12 is a flowchart showing an example of the processing operation of the base station related to the antenna control processing. FIG. 13 is a flowchart showing an example of the processing operation of the centralized control station related to the first antenna control processing. FIG. 14 is a flowchart showing an example of the processing operation of the centralized control station related to the second antenna control processing. FIG. 15 is a flowchart showing an example of the processing operation of the centralized control station related to the third antenna control processing. FIG. 16 is an explanatory diagram showing an example of the processing operation of the wireless system when collecting the received power amount for each polarization method of the fourth embodiment. FIG. 17 is a flowchart showing an example of the processing operation of the centralized control station related to the fourth antenna control processing. FIG. 18 is an explanatory diagram showing an example of the processing operation of the wireless system when collecting the received power amount for each polarization method of the fifth embodiment. FIG. 19 is a flowchart showing an example of the processing operation of the centralized control station related to the fifth antenna control processing. FIG. 20 is an explanatory diagram showing an example of the processing operation of the wireless system when collecting the received power amount for each polarization method of the sixth embodiment. FIG. 21 is a flowchart showing an example of the processing operation of the centralized control station related to the sixth antenna control processing. FIG. 22 is a flowchart showing an example of the processing operation of the centralized control station related to the seventh antenna control processing. FIG. 23 is an explanatory diagram showing an example of a PUCCH format configuration to which reception quality information is added for each polarization method.

Hereinafter, examples of the control device, the antenna setting method, and the wireless system disclosed in the present application will be described in detail with reference to the drawings. The disclosed technique is not limited by each embodiment. In addition, the examples shown below may be appropriately combined as long as they do not cause a contradiction.

FIG. 1 is an explanatory diagram showing an example of the wireless system 1 of the first embodiment. The wireless system 1 shown in FIG. 1 has a plurality of mobile stations 2, a plurality of base stations 3, and a centralized control station 4. The mobile station 2 is a terminal device such as a smartphone that supports 5G such as mobile stations 2A, 2B, 2C, and 2D, which is wirelessly connected to the base station 3. The base station 3 is, for example, base stations 3A, 3B, 3C and 3D that are wirelessly connected to the mobile station 2. The centralized control station 4 is a control device that centrally controls the base station 3.

FIG. 2 is a block diagram showing an example of the hardware configuration of the mobile station 2. The mobile station 2 shown in FIG. 2 includes an antenna 11, a first switching unit 12, a first receiving unit 13, a first transmitting unit 14, a first memory 15, and a first processor 16. Has. The antenna 11 has, for example, an H-polarized antenna 11A and a V-polarized antenna 11B. The mobile station 2 may be provided with both the H-polarized antenna 11A and the V-polarized antenna 11B, or may be provided with either antenna 11. The first switching unit 12 is a switch that switches and connects the H-polarized antenna 11A and the V-polarized antenna 11B and switches the H-polarized antenna 11A and the V-polarized antenna 11B to a transmitting antenna or a receiving antenna. The first receiving unit 13 is a circuit for receiving a downlink radio signal to and from the base station 3. The first transmission unit 14 is a circuit for transmitting an uplink radio signal to and from the base station 3. The first memory 15 is an area for storing various information. The first processor 16 is a circuit that controls the entire mobile station 2.

FIG. 3 is an explanatory diagram showing an example of a first receiving unit 13 and a first transmitting unit 14 in the mobile station 2. The first receiving unit 13 includes a wireless receiving unit 21, a data signal demodulation / decoding unit 22, a control signal demodulation / decoding unit 23, a CH (Channel) estimation unit 24, and a reception quality calculation unit 25. The radio receiving unit 21 receives the downlink radio signal from the base station 3. The data signal demodulation / decoding unit 22 demodulates the downlink radio signal and decodes the data signal. The control signal demodulation / decoding unit 23 demodulates the downlink radio signal and decodes the control signal. The CH estimation unit 24 estimates the CH estimation value from the RS (Reference Signal) signal of the downlink radio signal. The reception quality calculation unit 25 calculates the reception quality of the downlink radio signal, for example, the amount of received power. The data signal demodulation / decoding unit 22 demodulates the data signal from the downlink radio signal based on the CH estimated value. The control signal demodulation / decoding unit 23 demodulates the control signal from the downlink radio signal based on the CH estimated value.

The first transmission unit 14 includes a data signal generation unit 26, a control signal generation unit 27, a data signal code / modulation unit 28, a control signal code / modulation unit 29, an RS generation unit 30, and a transmission format forming unit. It has 31 and a wireless transmission unit 32. The data signal generation unit 26 generates a data signal. The control signal generation unit 27 generates a control signal. The data signal coding / modulation unit 28 encodes the data signal and modulates the encoded data signal into an uplink radio signal. The control signal coding / modulation unit 29 encodes the control signal and modulates the encoded control signal into an uplink radio signal. The RS generation unit 30 generates an RS signal. The transmission format forming unit 31 forms a transmission format of an uplink radio signal including a data signal, a control signal, an RS signal, and the like. The wireless transmission unit 32 transmits an uplink radio signal from the antenna 11 to the base station 3 via the first switching unit 12.

FIG. 4 is a block diagram showing an example of the hardware configuration of the base station 3. The base station 3 shown in FIG. 4 includes an antenna 41, a second switching unit 42, a second receiving unit 43, a second transmitting unit 44, an interface 45, a second memory 46, and a second. Has a processor 47 and. The antenna 41 has, for example, two V-polarized antennas 41B and two H-polarized antennas 41A. The number of antennas of the V-polarized antenna 41B and the H-polarized antenna 41A can be changed as appropriate. The second switching unit 42 is a switch that switches and connects the H-polarized antenna 41A and the V-polarized antenna 41B and switches the V-polarized antenna 41B and the H-polarized antenna 41A to the transmitting antenna or the receiving antenna. The second receiving unit 43 is a circuit that receives an uplink radio signal to and from the mobile station 2. The second transmission unit 44 is a circuit that transmits a downlink radio signal to and from the mobile station 2. The interface 45 is an interface for communication connection with the centralized control station 4. The second memory 46 is an area for storing various information. The second processor 47 is a circuit that controls the entire base station 3.

FIG. 5 is an explanatory diagram showing an example of a second receiving unit 43, a second transmitting unit 44, and the like in the base station 3. The second receiving unit 43 includes a wireless receiving unit 51, a data signal demodulation / decoding unit 52, a control signal demodulation / decoding unit 53, a CH estimation unit 54, and an uplink reception quality calculation unit 55. The wireless receiving unit 51 receives a wireless signal from the second switching unit 42. The data signal demodulation / decoding unit 52 demodulates the uplink radio signal and decodes the data signal. The control signal demodulation / decoding unit 53 demodulates the uplink radio signal and decodes the control signal. The CH estimation unit 54 estimates the CH estimation value from the RS of the uplink radio signal. The uplink reception quality calculation unit 55 calculates the reception quality of the uplink radio signal. The data signal demodulation / decoding unit 52 demodulates the uplink radio signal based on the CH estimated value. The control signal demodulation / decoding unit 53 demodulates the uplink radio signal based on the CH estimated value.

The second transmission unit 44 includes a data signal generation unit 56, a control signal generation unit 57, a data signal code / modulation unit 58, a control signal code / modulation unit 59, an RS generation unit 60, and an allocation / arrangement unit. It has 61 and a radio transmission unit 62. The data signal generation unit 56 generates a data signal. The control signal generation unit 57 generates a control signal. The data signal coding / modulation unit 58 encodes the data signal and demodulates the encoded data signal into a downlink radio signal. The control signal coding / modulation unit 59 encodes the control signal and demodulates the encoded control signal into a downlink radio signal. The RS generation unit 60 generates RS. The allocation / arrangement unit 61 arranges a data signal, a control signal, an RS, or the like in a downlink radio signal. The radio transmission unit 62 transmits a radio signal from the antenna 41 to the mobile station 2 via the second switching unit 42. The base station 3 has a scheduler 63 in the second processor 47. The scheduler 63 controls the communication timing of the uplink radio signal and the downlink radio signal.

FIG. 6 is a block diagram showing an example of the hardware configuration of the centralized control station 4. The centralized control station 4 shown in FIG. 6 has an interface 71, a third memory 72, and a third processor 73. The interface 71 is an interface for communication connection with the base station 3. The third memory 72 is an area for storing various information. The third processor 73 is a circuit that controls the entire centralized control station 4.

FIG. 7 is a block diagram showing an example of the functional configuration of the third processor 73. Various programs are stored in the third memory 72. The third processor 73 configures various processing functions by executing various programs in the third memory 72. The third processor 73 has a collection unit 81, a calculation unit 82, a determination unit 83, and a setting unit 84 as processing functions. The collecting unit 81 collects downlink quality information from each base station 3. The downlink quality information is information such as the amount of received power of each antenna 11 for each mobile station 2. The calculation unit 82 calculates the received power amount for each antenna 11. The received power amount for each antenna 11 is the received power amount of the H-polarized antenna A in the wireless system 1 and the received power amount of the V-polarized antenna 11B in the wireless system 1. The calculation unit 82 has, for example, a ratio of the received power amount of the V-polarized antenna 11B of all mobile stations 2 in the wireless system 1 to the received power amount of the H-polarized antenna 11A of all mobile stations 2 in the wireless system 1. Is calculated. The determination unit 83 determines the number of antennas to be used in the base station 3 based on the ratio of the received power amount between the V-polarized antenna 11B and the H-polarized antenna 11A. The number of antennas used is the number of V-polarized antennas 41B and the number of H-polarized antennas 41A used in the base station 3 used in the entire wireless system 1. The setting unit 84 sets the used antenna information including the number of V-polarized antennas 41B used and the number of H-polarized antennas 41A used in each base station 3.

FIG. 8 is an explanatory diagram showing an example of a PUCCH format configuration to which reception quality information is added for each polarization method. The PUCCH format consists of an identifier that identifies the V-polarized antenna 11B, reception quality information (downstream quality information: CQI) of the V-polarized antenna 11B, an identifier that identifies the H-polarized antenna 11A, and the H-polarized antenna 11A. It has the reception quality information (downlink quality information: CQI) of. The mobile station 2 uses PUCCH to notify the base station 3 of the reception quality information. Then, the base station 3 notifies the centralized control station 4 of the reception quality information for each mobile station 2 received from the mobile station 2 by PUCCH.

Next, the operation of the wireless system 1 of the first embodiment will be described. FIG. 9 is an explanatory diagram showing an example of the processing operation of the wireless system 1 when collecting the received power amount for each polarization method of the first embodiment. The wireless system 1 has four base stations 3A to 3D, four mobile stations 2A to 2D, and a centralized control station 4. The mobile stations 2A to 2D include one V-polarized antenna 11B and one H-polarized antenna 11A. The base stations 3A to 3D include two V-polarized antennas 41B and two H-polarized antennas 41A. The total number of antennas used in the base stations 3A to 3D of the entire wireless system 1 is 16, but the total number of antennas is set to 8 in order to reduce power consumption.

The mobile station 2A calculates the received power amount Rv1 of the V-polarized antenna 11B and the received power amount Rh1 of the H-polarized antenna 11A. The mobile station 2A transmits the received power amount Rv1 of V polarization and the received power amount Rh1 of H polarization to the base station 3A by PUCCH. The mobile station 2B calculates the received power amount Rv2 of the V-polarized antenna 11B and the received power amount Rh2 of the H-polarized antenna 11A. The mobile station 2B transmits the received power amount Rv2 of V polarization and the received power amount Rh2 of H polarization to the base station 3B by PUCCH.

The mobile station 2C calculates the received power amount Rv3 of the V-polarized antenna 11B and the received power amount Rh3 of the H-polarized antenna 11A. The mobile station 2C transmits the received power amount Rv3 of V polarization and the received power amount Rh3 of H polarization to the base station 3C by PUCCH. The mobile station 2D calculates the received power amount Rv4 of the V-polarized antenna 11B and the received power amount Rh4 of the H-polarized antenna 11A. The mobile station 2D transmits the received power amount Rv4 of V polarization and the received power amount Rh4 of H polarization to the base station 3D by PUCCH.

Further, the centralized control station 4 collects the received power amount of V polarization and the received power amount of H polarization for each mobile station 2 from each base station 3A to 3D. The centralized control station 4 compares the received power amount of V polarization and the received power amount of H polarization for each mobile station 2. Based on the comparison result, the centralized control station 4 calculates the number of mobile stations 2 having a better V-polarized power reception power and the number of mobile stations 2 having a better H-polarized power reception power. do. As a result, in the case of mobile stations 2A, 2C and 2D, for example, the number of mobile stations 2 having a better received power amount of V polarization is set to three. For example, in the case of mobile station 2B, the number of mobile stations 2 having a better amount of received power for H polarization is one. The number of mobile stations 2 having a better amount of received power for V polarization: The usage ratio of the number of mobile stations 2 having a better amount of received power for H polarization is 3: 1. Therefore, when the total number of antennas of all the base stations 3 in the wireless system 1 is eight, six V-polarized antennas 41B used in the entire wireless system 1 are H-polarized based on the usage ratio of 3: 1. There are two antennas 41A. The centralized control station 4 uses an antenna distribution algorithm to generate antenna distribution information for each base station 3 based on the number of V-polarized antennas 41B used and the number of H-polarized antennas 41A used, and the antenna distribution information. Is transmitted to each base station 3.

FIG. 10 is a flowchart showing an example of the processing operation of the mobile station 2 related to the mobile station side report processing. The first processor 16 in the mobile station 2 determines whether or not the downlink quality information including the received power amount for each downlink antenna 11 has been acquired (step S11). When the first processor 16 acquires the downlink quality information (affirmation in step S11), the first processor 16 stores the downlink quality information in the first memory 15 (step S12).

The first processor 16 determines whether or not the reporting timing to the base station 3 has been detected (step S13). The reporting timing is, for example, a predetermined cycle. When the first processor 16 detects the timing of reporting to the base station 3 (affirmation in step S13), the first processor 16 determines whether or not there is unreported downlink quality information stored in the first memory 15 (step S14). ). The unreported downlink quality information is the downlink quality information that has not been reported to the base station 3.

When there is unreported downlink quality information (step S14 affirmative), the first processor 16 stores the downlink quality information in the PUCCH (step S15), and transmits the PUCCH storing the downlink quality information to the base station 3 (step S14 affirmative). Step S16), the processing operation shown in FIG. 10 is terminated.

When the first processor 16 does not acquire the downlink quality information (denial in step S11), the first processor 16 proceeds to step S13 in order to determine whether or not the timing of reporting to the base station 3 has been detected. The first processor 16 performs the processing operation shown in FIG. 10 when the report timing to the base station 3 is not detected (step S13 denial) or when there is no unreported downlink quality information (step S14 denial). finish.

The first processor 16 acquires the downlink quality information of the downlink with the base station 3, and transmits the unreported downlink quality information to the base station 3 by the PUCCH. As a result, the mobile station 2 can report the downlink quality information to the base station 3 by PUCCH.

FIG. 11 is a flowchart showing an example of the processing operation of the base station 3 related to the base station side report processing. In FIG. 11, the second processor 47 in the base station 3 determines whether or not the PUCCH has been received from the mobile station 2 (step S21). When the second processor 47 receives the PUCCH (affirmation in step S21), the second processor 47 extracts information from the PUCCH (step S22).

The second processor 47 determines whether or not there is downlink quality information in the extracted information (step S23). When there is downlink quality information (step S23 affirmative), the second processor 47 stores the downlink quality information in the second memory 46 (step S24). The second processor 47 determines whether or not the report timing to the centralized control station 4 has been detected (step S25).

When the second processor 47 detects the timing of reporting to the centralized control station 4 (affirmation in step S25), the second processor 47 determines whether or not there is unreported downlink quality information (step S26). When there is unreported downlink quality information (step S26 affirmative), the second processor 47 reports the unreported downlink quality information to the centralized control station 4 (step S27), and ends the processing operation shown in FIG. .. When the second processor 47 does not receive the PUCCH from the mobile station 2 (negation in step S21), the second processor 47 proceeds to step S25 in order to determine whether or not the timing of reporting to the centralized control station 4 has been detected. If there is no downlink quality information in the extracted information (step S23 is denied), the second processor 47 proceeds to step S25.

When the second processor 47 does not detect the reporting timing to the centralized control station 4 (step S25 denial) or when there is no unreported downlink quality information (step S26 denial), the processing operation shown in FIG. 11 is performed. finish.

When the base station 3 receives the downlink quality information from the mobile station 2 on the PUCCH, the base station 3 reports the downlink quality information to the centralized control station 4. As a result, the centralized control station 4 can collect downlink quality information from each base station 3.

FIG. 12 is a flowchart showing an example of the processing operation of the base station 3 related to the antenna control processing. In FIG. 12, the second processor 47 in the base station 3 determines whether or not control information has been received from the centralized control station 4 (step S31). The control information includes antenna distribution information including the number of H-polarized antennas 41A used and the number of V-polarized antennas 41B used. When the second processor 47 receives the control information (step S31 affirmative), the second processor 47 selects the antenna 41 to be used based on the antenna distribution information in the control information (step S32), and the transmission power of the antenna 41 is based on the control information. Is controlled (step S33).

The second processor 47 starts the transmission operation at the selected antenna 41 (step S34), and ends the processing operation shown in FIG. When the second processor 47 does not receive the control information from the centralized control station 4 (denial in step S31), the second processor 47 ends the processing operation shown in FIG.

When the base station 3 receives the control information from the centralized control station 4, the base station 3 selects the antenna to be used from the H-polarized antenna 41A and the V-polarized antenna 41B based on the antenna distribution information in the control information. The base station 3 selects the H-polarized antenna 41A and the V-polarized antenna 41B according to the number of antenna information used from the antennas 41 of all the base stations 3 in the wireless system 1.

FIG. 13 is a flowchart showing an example of the processing operation of the centralized control station 4 related to the first antenna control processing. In FIG. 13, the third processor 73 in the centralized control station 4 determines whether or not downlink quality information has been received from all the base stations 3 (step S41). When the third processor 73 receives downlink quality information from all the base stations 3 (affirmation in step S41), the third processor 73 compares the received power amount for each antenna 11 for each mobile station 2 (step S42). The third processor 73 compares the received power amount of the V-polarized antenna 11B with the received power amount of each H-polarized antenna 11A for each mobile station 2.

The third processor 73 determines the received power amount of the V-polarized antenna 11B based on the comparison result between the received power amount of the V-polarized antenna 11B and the received power amount of the H-polarized antenna 11A for each mobile station 2. Counts the number Nv of the mobile station 2 having a good value (step S43). Further, the third processor 73 counts the number Nh of the mobile stations 2 having a better received power amount of the H polarization antenna 11A based on the comparison result (step S44).

The third processor 73 calculates the number of V-polarized antennas 41B used in the entire wireless system 1 based on N × Nv / (Nv + Nh) (step S45). In the example of the wireless system 1 of FIG. 9, the total number of antennas N is eight, the number of antennas Nv is three, and the number of antennas Nh is one. Therefore, the number of V-polarized antennas 41B used in the entire wireless system 1 is 8 × 3 / (3 + 1) = 6. Further, the third processor 73 calculates the number of H-polarized antennas 41A used in the entire wireless system 1 based on N × Nh / (Nv + Nh) (step S46). In the example of the wireless system 1 of FIG. 9, the number of H-polarized antennas 41A used is 8 × 1 / (3 + 1) = 2. The third processor 73 transmits control information including the number of V-polarized antennas 41B used and the number of H-polarized antennas 41A used to each base station 3 (step S47), and ends the processing operation shown in FIG. .. The centralized control station 4 uses an antenna distribution algorithm to generate antenna distribution information for each base station 3 based on the number of V-polarized antennas 41B used and the number of H-polarized antennas 41A used, and the antennas thereof. The distribution information is transmitted to each base station 3. Each base station 3 sets the number of antennas 41 to be used based on the antenna distribution information from the centralized control station 4. In the example of FIG. 9, the base stations 3A, 3C, and 3D have two V-polarized antennas 41B each, and the base station 3B has two H-polarized antennas 41A. When the third processor 73 does not receive the downlink quality information from all the base stations 3 (denial in step S41), the third processor 73 ends the processing operation shown in FIG.

The centralized control station 4 calculates the received power amount for each antenna 11 for each mobile station 2 in the wireless system 1, and counts the number Nv of the mobile stations 2 for which the received power amount of the V-polarized antenna 11B is better. .. Further, the centralized control station 4 counts the number Nh of the mobile stations 2 having a better received power amount of the H polarization antenna 11A. The centralized control station 4 calculates the number of V-polarized antennas 41B used in the entire wireless system 1 based on N × Nv / (Nv + Nh). The centralized control station 4 calculates the number of H-polarized antennas 41A used in the entire wireless system 1 based on N × Nh / (Nv + Nh). Then, the centralized control station 4 notifies each base station 3 of the antenna distribution information of each base station 3 based on the number of used V-polarized antennas 41B and the number of used H-polarized antennas 41A. As a result, the centralized control station 4 can change the antenna 41 used by each base station 3 according to the actual usage status of the mobile station 2, for example, the received power amount of V polarization and the reception power amount of H polarization. Then, the throughput of wireless communication between the mobile station 2 and the base station 3 is improved. Moreover, since each base station 3 also has an unused antenna 41, the transmission power of the entire wireless system 1 can be reduced.

In the centralized control station 4 of the first embodiment, the number of mobile stations 2 Nv in which the received power amount of the V-polarized antenna 11A is better and the received power amount of the H-polarized antenna 11B are better. The number of antennas used in all base stations 3 was calculated based on the ratio of the number of stations 2 to Nh. However, the centralized control station 4 may not only calculate the number of antennas used but also control the amount of transmission power of the antennas used, and the embodiment in that case will be described below as Example 2. By assigning the same reference numerals to the same configurations as those in the first embodiment, the description of the overlapping configurations and operations will be omitted.

The mobile station 2 having a better received power amount of V polarization is, for example, mobile stations 2A, 2C and 2D. The mobile station 2 having a better amount of received power for H polarization is, for example, mobile station 2B. The third processor 73 in the centralized control station 4 calculates P × Nv / (Nv + Nh) as the transmission power amount of the V polarization of each base station 3. Note that P is the allowable transmission power amount of the entire wireless system 1. Further, the third processor 73 calculates P × Nh / (Nv + Nh) as the transmission power amount of the H polarization of each base station 3. The third processor 73 calculates the transmission power amount P × Nv / (Nv + Nh) of V polarization and the transmission power amount P × Nh / (Nv + Nh) of H polarization. The third processor 73 determines the transmission power amount of the V-polarized antenna and the transmitted power amount of the H-polarized antenna based on the antenna distribution information of the number of V-polarized antennas 41B used and the number of H-polarized antennas 41A used. Generates power distribution information to be distributed to the base station 3. The third processor 73 transmits the antenna distribution information and the power distribution information to each base station 3.

FIG. 14 is a flowchart showing an example of the processing operation of the centralized control station 4 involved in the second antenna control processing. In FIG. 14, the third processor 73 in the centralized control station 4 determines whether or not downlink quality information has been received from all the base stations 3 (step S51). When the third processor 73 receives downlink quality information from all the base stations 3 (affirmation in step S51), the third processor 73 compares the received power amount for each antenna 11 for each mobile station 2 (step S52). The third processor 73 compares the received power amount of the V-polarized antenna 11B with the received power amount of the H-polarized antenna 11A for each mobile station 2.

The third processor 73 determines the received power amount of the V-polarized antenna 11B based on the comparison result between the received power amount of the V-polarized antenna 11B and the received power amount of the H-polarized antenna 11A for each mobile station 2. Counts the number Nv of the mobile station 2 having a good value (step S53). Further, the third processor 73 counts the number Nh of the mobile stations 2 having a better received power amount of the H polarization antenna 11A based on the comparison result (step S54).

The third processor 73 calculates the transmission power amount of the V polarization antenna 41B of P × Nv / (Nv + Nh) (step S55). Further, the third processor 73 calculates the transmission power amount of the H polarization antenna 41A of P × Nh / (Nv + Nh) (step S56). The third processor 73 transmits control information including the amount of transmission power to each base station 3 (step S57), and ends the processing operation shown in FIG. The centralized control station 4 uses an antenna distribution algorithm to obtain antenna distribution information of each base station 3 based on the number of V-polarized antennas 41B used and the number of H-polarized antennas 41A used in the entire wireless system 1. Generate. Further, the centralized control station 4 has the H-polarized antenna and the V-polarized antenna of each base station 3 based on the transmitted power amount of the V-polarized antenna 41B and the transmitted power amount of the H-polarized antenna 41A of the entire wireless system 1. The power distribution information for distributing the transmission power amount is transmitted to each base station 3. As a result, the base station 3 can output the transmission power of the polarized antenna 41 of the base station 3 according to the usage status of the polarized antenna 11 of each mobile station 2 in the wireless system 1.

The centralized control station 4 calculates the received power amount for each antenna 11 for each mobile station 2 in the wireless system 1, and counts the number Nv of the mobile stations 2 for which the received power amount of the V-polarized antenna 11B is better. .. Further, the centralized control station 4 counts the number Nh of the mobile stations 2 having a better received power amount of the H polarization antenna 11A. The centralized control station 4 calculates the transmission power amount of the V-polarized antenna 41B of the entire wireless system 1 with P × Nv / (Nv + Nh), and the H-polarized antenna of the entire wireless system 1 with P × Nh / (Nv + Nh). The amount of transmission power of 41A is calculated. Then, the centralized control station 4 notifies each base station 3 of the power distribution information of each base station 3 based on the transmission power amount of the V polarization antenna 41B and the transmission power amount of the H polarization antenna 41A. As a result, the centralized control station 4 has the transmission power amount of the antenna 41 used by each base station 3 according to the actual usage status of the mobile station 2, for example, the received power amount of V polarization and the reception power amount of H polarization. Can be changed. Then, the throughput of wireless communication between the mobile station 2 and the base station 3 is improved. Moreover, each base station 3 can reduce the amount of transmission power of the entire wireless system 1.

Further, the centralized control station 4 has a number of mobile stations 2 having a better received power amount of the V-polarized antenna 11B and a number of mobile stations 2 having a better received power amount of the H-polarized antenna 11A. Based on the ratio, the number of antennas used by all the base stations 3 was calculated. However, the centralized control station 4 may calculate the number of antennas used by each base station 3 based on the power difference between the received power amount of V polarization and the received power amount of H polarization for each mobile station 2. The embodiment in that case will be described below as Example 3. The same configuration as that of the wireless system 1 of the first embodiment is designated by the same reference numeral, and the description of the overlapping configuration and operation will be omitted.

The centralized control station 4 has the received power amount of the V-polarized antenna 11B among the mobile stations 2 in which the power difference between the received power amount of the V-polarized antenna 11B and the received power amount of the H-polarized antenna 11A is a predetermined amount or more. The number Nv1 of the mobile station 2 which is better is counted. Further, the centralized control station 4 has the received power of the H-polarized antenna 11A among the mobile stations 2 in which the power difference between the received power of the V-polarized antenna 11B and the received power of the H-polarized antenna 11A is a predetermined amount or more. The number Nh1 of the mobile station 2 whose quantity is better is counted. The centralized control station 4 calculates the number of antennas used by the V-polarized antenna 41B used in the entire wireless system 1 based on N × Nv1 / (Nv1 + Nh1). Further, the centralized control station 4 calculates the number of antennas used by the H-polarized antenna 41A used in the entire wireless system 1 based on N × Nh1 / (Nv1 + Nh1).

In the example of FIG. 9, the power difference between the received power amount of the V-polarized antenna 11B and the received power amount of the H-polarized antenna 11A is a predetermined amount or more, and the received power amount of the V-polarized antenna 11B is better. Since the mobile station 2 is, for example, mobile stations 2A, 2C and 2D, the number of mobile stations 2 Nv1 is three. Further, the mobile station 2 has a power difference between the received power amount of the V-polarized antenna 11B and the received power amount of the H-polarized antenna 11A of a predetermined amount or more, and the received power amount of the H-polarized antenna 11A is better. For example, since the mobile station 2B, the number of mobile stations 2 Nh1 is one. As a result, the number of H-polarized antennas 41A used is 8 × 3 / (3 + 1) = 6, and the number of V-polarized antennas 41B used is 8 × 1 / (3 + 1) = 2.

FIG. 15 is a flowchart showing an example of the processing operation of the centralized control station 4 related to the third antenna control processing. In FIG. 15, the third processor 73 in the centralized control station 4 determines whether or not downlink quality information has been received from all the base stations 3 in the wireless system 1 (step S61). When the third processor 73 receives downlink quality information from all the base stations 3 (affirmation in step S61), the third processor 73 compares the received power amount of each antenna 11 for each mobile station 2 (step S62). The third processor 73 compares the received power amount of the V-polarized antenna 11B with the received power amount of the H-polarized antenna 11A for each mobile station 2.

The third processor 73 determines whether or not there is a mobile station 2 in which the power difference between the received power amount Rv of the V-polarized antenna 11B and the received power amount Rh of the H-polarized antenna 11A is a predetermined amount TH or more. Step S63). When there is a mobile station 2 having a power difference of TH or more (step S63 affirmative), the third processor 73 receives power from the V-polarized antenna 11B among the mobile stations 2 having a power difference of TH or more. Counts the number Nv1 of the mobile station 2 which is better (step S64). The third processor 73 counts the number Nh1 of the mobile stations 2 having a better received power amount of H polarization among the mobile stations 2 having a power difference of TH or more (step S65).

The third processor 73 calculates the number of V-polarized antennas 41B used in the entire wireless system 1 based on N × Nv1 / (Nv1 + Nh1) (step S66). Further, the third processor 73 calculates the number of H-polarized antennas 41A used in the entire wireless system 1 based on N × Nh1 / (Nv1 + Nh1) (step S67). The third processor 73 transmits control information including the number of used V-polarized antennas 41B and the number of used H-polarized antennas 41A to the base station 3 (step S68), and ends the processing operation shown in FIG. The centralized control station 4 uses an antenna distribution algorithm to generate antenna distribution information for each base station 3 based on the number of V-polarized antennas 41B used and the number of H-polarized antennas 41A used, and the antennas thereof. The distribution information is transmitted to each base station 3. Each base station 3 sets the number of antennas 41 to be used based on the antenna distribution information from the centralized control station 4. In the example of FIG. 9, the base stations 3A, 3C, and 3D have two V-polarized antennas 41B each, and the base station 3B has two H-polarized antennas 41A. The third processor 73 does not receive downlink quality information from all the base stations 3 (step S61 negative), or there is no mobile station 2 having a power difference of TH or more by a predetermined amount TH (step S63 negative). The processing operation shown in 15 is terminated.

The centralized control station 4 receives the V-polarized antenna 11B among the mobile stations 2 in which the power difference between the received power Rv of the V-polarized antenna 11B and the received power Rh of the H-polarized antenna 11A is a predetermined amount TH or more. The number Nv1 of the mobile station 2 having a better electric power amount is counted. Further, the centralized control station 4 has the H polarization antenna 11A among the mobile stations 2 in which the power difference between the received power amount Rv of the V polarization antenna 11B and the reception power amount Rh of the H polarization antenna 11A is a predetermined amount TH or more. The number Nh1 of the mobile station 2 whose received electric energy is better is counted. The centralized control station 4 calculates the number of V-polarized antennas 41B used in the entire wireless system 1 based on N × Nv1 / (Nv1 + Nh1). Further, the centralized control station 4 calculates the number of H-polarized antennas 41A used in the entire wireless system 1 based on N × Nh1 / (Nv1 + Nh1). Then, the centralized control station 4 notifies each base station 3 of the antenna distribution information of each base station 3 based on the number of used V-polarized antennas 41B and the number of used H-polarized antennas 41A. As a result, the centralized control station 4 can change the antenna 41 used by each base station 3 according to the actual usage status of the mobile station 2, for example, the received power amount of V polarization and the reception power amount of H polarization. Then, the throughput of wireless communication between the mobile station 2 and the base station 3 is improved.

Further, the centralized control station 4 may calculate the number of antennas used by each base station 3 based on the received power fluctuation amount of the V polarization and the H polarization for each mobile station 2 in a predetermined period. The embodiment of the above will be described below as Example 4. The same configuration as that of the wireless system 1 of the first embodiment is designated by the same reference numeral, and the description of the overlapping configuration and operation will be omitted.

FIG. 16 is an explanatory diagram showing an example of a processing operation of the wireless system 1A when collecting the received power amount for each polarization method of the fourth embodiment. The mobile station 2 acquires the received power amount of V polarization and the received power amount of H polarization at the time t, and the received power amount of V polarization and the received power amount of H polarization at t time are the base station by PUCCH. Notify 3. Each base station 3 notifies the centralized control station 4 of the received power amount of V polarization and the received power amount of H polarization at time t. When the centralized control station 4 receives the received power amount of the V polarization at the time t of each mobile station 2, the centralized control station 4 calculates the received power fluctuation amount RVv of the V polarization in a predetermined period by using (Formula 1).

Further, when the centralized control station 4 receives the received power amount of the H polarization at the time t of each mobile station 2, the centralized control station 4 calculates the received power fluctuation amount RVh of the H polarization in a predetermined period by using (Formula 2). do.

Further, the centralized control station 4 counts the number Nv2 of the mobile stations 2 whose received power fluctuation amount RVv is smaller than the received power fluctuation amount RVh and whose received power fluctuation amount RVv is less than the predetermined fluctuation amount Rth. Further, the centralized control station 4 counts the number Nh2 of the mobile stations 2 whose received power fluctuation amount RVh is smaller than the received power fluctuation amount RVv and whose received power fluctuation amount RVh is less than the predetermined fluctuation amount Rth. The centralized control station 4 calculates the number of V-polarized antennas 41B used in the entire wireless system 1A based on N × Nv2 / (Nv2 + Nh2). Further, the centralized control station 4 calculates the number of H-polarized antennas 41A used in the entire wireless system 1A based on N × Nh2 / (Nv2 + Nh2). In the example of FIG. 16, the received power fluctuation amount RVv is smaller than the received power fluctuation amount RVh, and the mobile station 2 whose received power fluctuation amount RVv is less than the predetermined fluctuation amount Rth is, for example, mobile stations 2A and 2C. Therefore, the number of mobile stations 2 Nv2 is two. Further, the mobile station 2 whose received power fluctuation amount RVh is smaller than the received power fluctuation amount RVv and whose received power fluctuation amount RVh is less than the predetermined fluctuation amount Rth is, for example, the mobile station 2B, so that the mobile station 2 The number of Nh2 is one. Further, the mobile station 2 whose received power fluctuation amount RVh and received power fluctuation amount RVv are not less than the predetermined fluctuation amount Rth is referred to as mobile station 2D. As a result, the number of H-polarized antennas 41A used is 8 × 2 / (2 + 1) ≈5, and the number of V-polarized antennas 41B used is 8 × 1 / (2 + 1) ≈3.

FIG. 17 is a flowchart showing an example of the processing operation of the centralized control station 4 related to the fourth antenna control processing. In FIG. 17, the third processor 73 in the centralized control station 4 determines whether or not downlink quality information has been received from all the base stations 3 (step S71). When the third processor 73 receives downlink quality information from all the base stations 3 (affirmation in step S71), the third processor 73 calculates the received power fluctuation amount of each antenna 11 for a predetermined period for each mobile station 2 (step S72). The received power fluctuation amount for each antenna 11 has a received power fluctuation amount RVv for a predetermined period of the V-polarized antenna 11B and a received power fluctuation amount RVh for a predetermined period of the H-polarized antenna 11A. The third processor 73 compares the received power fluctuation amount RVv of the V-polarized antenna 11B with the received power fluctuation amount RVh of the H-polarized antenna 11A for each mobile station 2 (step S73).

The third processor 73 determines whether or not there is a mobile station 2 in which the received power fluctuation amount RVv of the V polarization antenna 11B or the received power fluctuation amount RVh of the H polarization antenna 11A is less than the predetermined fluctuation amount Rth (step). S74). The mobile station 2 in which the received power fluctuation amount is less than the predetermined fluctuation amount Rth is the mobile station 2 in which the received power amount is stable. The third processor 73 shifts to step S75 when there is a mobile station 2 whose received power fluctuation amount is less than the predetermined fluctuation amount Rth (affirmation in step S74). In the third processor 73, among the mobile stations 2 in which the received power fluctuation amount RVv of the V-polarized antenna 11B is less than the predetermined fluctuation amount Rth, the number of mobile stations 2 in which the received power fluctuation amount RVv of the V-polarized antenna 11B is small Nv2 Is counted (step S75). In the third processor 73, among the mobile stations 2 in which the received power fluctuation amount RVh of the H polarization antenna 11A is less than the predetermined fluctuation amount Rth, the number of mobile stations 2 having a small received power fluctuation amount RVh of the H polarization antenna 11A Nh2 Is counted (step S76).

The third processor 73 calculates the number of V-polarized antennas 41B used in the entire wireless system 1A based on N × Nv2 / (Nv2 + Nh2) (step S77). Further, the third processor 73 calculates the number of H-polarized antennas 41A used in the entire wireless system 1A based on N × Nh2 / (Nv2 + Nh2) (step S78). The third processor 73 transmits control information including the number of used V-polarized antennas 41B and the number of used H-polarized antennas 41A to the base station 3 (step S79), and ends the processing operation shown in FIG. The centralized control station 4 uses an antenna distribution algorithm to generate antenna distribution information for each base station 3 based on the number of V-polarized antennas 41B used and the number of H-polarized antennas 41A used, and the antennas thereof. The distribution information is transmitted to each base station 3. Each base station 3 sets the number of antennas 41 to be used based on the antenna distribution information from the centralized control station 4. In the example of FIG. 16, the base stations 3A and 3C have two V-polarized antennas 41B each, the base station 3B has two H-polarized antennas 41A, and the base station 3D has two V-polarized antennas 41B and H-polarized antennas 41A. Will be set one by one. When the third processor 73 does not receive downlink quality information from all the base stations 3 (step S71 denial), or when there is no mobile station 2 whose received power fluctuation amount is less than the predetermined fluctuation amount Rth (step S74 denial). ), The processing operation shown in FIG. 17 is terminated.

The centralized control station 4 calculates the received power fluctuation amount of each antenna 11 for each mobile station 2 in the wireless system 1A, the received power fluctuation amount RVv of the V polarization antenna 11B is smaller, and the received power fluctuation amount is smaller. The number Nv2 of the mobile station 2 whose RVv is less than the predetermined fluctuation amount is counted. Further, the centralized control station 4 counts the number Nh2 of the mobile stations 2 in which the received power fluctuation amount RVh of the H polarization antenna 11A is smaller and the received power fluctuation amount RVh is less than the predetermined fluctuation amount. The centralized control station 4 calculates the number of V-polarized antennas 41B used in the entire wireless system 1A based on N × Nv2 / (Nv2 + Nh2). The centralized control station 4 calculates the number of H-polarized antennas 41A used in the entire wireless system 1A based on N × Nh2 / (Nv2 + Nh2). Then, the centralized control station 4 notifies each base station 3 of the antenna distribution information of each base station 3 based on the number of used V-polarized antennas 41B and the number of used H-polarized antennas 41A. As a result, the centralized control station 4 changes the antenna 41 used by each base station 3 according to the actual usage status of the mobile station 2, for example, the stable received power amount of V polarization and the received power amount of H polarization. can. Then, the throughput of wireless communication between the mobile station 2 and the base station 3 is improved.

Further, the centralized control station 4 uses each base station in the wireless system 1 in consideration of the traffic amount of each mobile station 2 in addition to the received power amount of V polarization and H polarization of each mobile station 2. The number of antennas may be calculated, and the embodiment in that case will be described below as Example 4. The same configuration as that of the wireless system 1 of the first embodiment is designated by the same reference numeral, and the description of the overlapping configuration and operation will be omitted.

FIG. 18 is an explanatory diagram showing an example of the processing operation of the wireless system 1B when collecting the received power amount for each polarization method of the fifth embodiment. Further, the centralized control station 4 collects the received power amount of V polarization and the received power amount of H polarization for each mobile station 2 from each base station 3A to 3D. The centralized control station 4 compares the received power amount of V polarization and the received power amount of H polarization for each mobile station 2. Based on the comparison result, the centralized control station 4 calculates the number Nv of the mobile station 2 having a better received power amount of V polarization and the number Nh of the mobile station 2 having a better received power amount of H polarization. do. In the example of FIG. 18, the mobile station 2 having a better received power amount of V polarization is, for example, mobile stations 2A, 2C and 2D, and the number Nv thereof is three. The mobile station 2 having a better received power amount of H polarization is, for example, mobile station 2B, and the number Nh thereof is one. Further, the centralized control station 4 determines the number Nv3 of the mobile stations 2 in which the traffic amount Tr of the mobile station 2A is equal to or less than the predetermined traffic amount Trth among the number Nv of the mobile stations 2 having a better received power amount of V polarization. Count as one. The centralized control station 4 calculates the number of V-polarized antennas 41B used based on {N × Nv / (Nv + Nh)} -Nv3 × Nsave. Since the number of antennas reduction value Nsave is, for example, the number of N / mobile stations 2, 8/4 = 2. The centralized control station 4 calculates the number of H-polarized antennas 41A used based on {N × Nh / (Nv + Nh)} −Nh3 × Nsave. Since the centralized control station 4 has {N × Nv / (Nv + Nh)} −Nv3 × Nsave = {8 × 3 / (3 + 1)} -1 × 2 = 4, the number of V polarization antennas 41B used is four. It becomes. Further, since the centralized control station 4 has {N × Nh / (Nv + Nh)} −Nh3 × Nsave = {8 × 1 / (3 + 1)} −0 × 2 = 2, the number of H polarization antennas 41A used is There will be two.

FIG. 19 is a flowchart showing an example of the processing operation of the centralized control station 4 related to the fifth antenna control processing. In FIG. 19, the third processor 73 in the centralized control station 4 determines whether or not downlink quality information has been received from all the base stations 3 (step S81). The downlink quality information includes the received power amount of the V-polarized antenna 11B for each mobile station 2, the received power amount of the H-polarized antenna 11A, and the traffic amount Tr for each mobile station 2.

When the third processor 73 receives downlink quality information from all the base stations 3 (affirmation in step S81), the third processor 73 compares the received power amount of each antenna 11 for each mobile station 2 (step S82). The third processor 73 compares the received power amount of the V-polarized antenna 11B with the received power amount of each H-polarized antenna 11A for each mobile station 2. The third processor 73 extracts the traffic amount Tr for each mobile station 2 (step S83).

The third processor 73 determines the received power amount of the V-polarized antenna 11B based on the comparison result between the received power amount of the V-polarized antenna 11B and the received power amount of the H-polarized antenna 11A for each mobile station 2. Counts the number Nv of the mobile station 2 having a good value (step S84). Further, the third processor 73 counts the number Nh of the mobile stations 2 having a better received power amount of the H polarization antenna 11A based on the comparison result (step S85).

The third processor 73 counts the number Nv3 of the mobile stations 2 whose traffic amount Tr is equal to or less than the predetermined traffic amount Trth among the number Nv of the mobile stations 2 of the V polarization antenna 11B (step S86). The third processor 73 counts the number Nh3 of the mobile stations 2 whose traffic amount Tr is equal to or less than the predetermined traffic amount Trth among the number Nh of the mobile stations 2 of the H polarization antenna 11A (step S87).

The third processor 73 calculates the number of V-polarized antennas 41B used in the entire wireless system 1B based on {N × Nv / (Nv + Nh)} −Nv3 × Nsave (step S88). Nsave is calculated by, for example, the total number of antennas N / the number of mobile stations 2. Further, the third processor 73 calculates the number of H-polarized antennas 41A used in the entire wireless system 1B based on {N × Nh / (Nv + Nh)} −Nh3 × Nsave (step S89). The third processor 73 transmits control information including the number of used V-polarized antennas 41B and the number of used H-polarized antennas 41A to the base station 3 (step S90), and ends the processing operation shown in FIG. The centralized control station 4 uses an antenna distribution algorithm to generate antenna distribution information for each base station 3 based on the number of V-polarized antennas 41B used and the number of H-polarized antennas 41A used, and the antennas thereof. The distribution information is transmitted to each base station 3. Each base station 3 sets the number of antennas 41 to be used based on the antenna distribution information from the centralized control station 4. In the example of FIG. 18, the base station 3C and 3D are set with two V-polarized antennas 41B each, and the base station 3B is set with two H-polarized antennas 41A. When the third processor 73 does not receive the downlink quality information from all the base stations 3 (denial in step S81), the third processor 73 ends the processing operation shown in FIG.

The centralized control station 4 calculates the received power amount of each antenna 11 for each mobile station 2 in the wireless system 1B, and counts the number Nv of the mobile stations 2 having a better received power amount of the V-polarized antenna 11B. .. Further, the centralized control station 4 counts the number Nh of the mobile stations 2 having a better received power amount of the H polarization antenna 11A. Further, the centralized control station 4 counts the number Nv3 of the mobile stations 2 whose traffic amount Tr is equal to or less than the predetermined traffic amount Trth among the number Nv of the mobile stations 2 of the V polarization antenna 11B. Further, the centralized control station 4 counts the number Nh3 of the mobile stations 2 whose traffic amount Tr is equal to or less than the predetermined traffic amount Trth among the number Nh of the mobile stations 2 of the H polarization antenna 11A. The centralized control station 4 calculates the number of V-polarized antennas 41B used in the entire wireless system 1B based on {N × Nv / (Nv + Nh)} -Nv3 × Nsave. The centralized control station 4 calculates the number of H-polarized antennas 41A used in the entire wireless system 1B based on {N × Nh / (Nv + Nh)} −Nh3 × Nsave. The centralized control station 4 notifies each base station 3 of the antenna distribution information of each base station 3 based on the number of V-polarized antennas 41B used and the number of H-polarized antennas 41A used. As a result, the centralized control station 4 uses the antenna 41 of each base station 3 according to the actual usage status of the mobile station 2, for example, the received power amount of V polarization, the received power amount of H polarization, and the traffic amount Tr. Can be changed. Then, the throughput of wireless communication between the mobile station 2 and the base station 3 is improved.

Further, in the wireless system 1B of the above embodiment, the antenna 11 (41) of the polarization method of the V polarization antenna 11B (41B) and the H polarization antenna 11A (41A) is exemplified. However, the present invention is not limited to the polarization antenna 11 (41), and can be applied to, for example, a wireless system using a massive antenna. Therefore, an embodiment thereof will be described below as Example 6. By assigning the same reference numerals to the same configurations as those in the first embodiment, the description of the overlapping configurations and operations will be omitted.

FIG. 20 is an explanatory diagram showing an example of the processing operation of the wireless system 100 when collecting the received power amount for each polarization method of the sixth embodiment. The wireless system 100 has, for example, four base stations 300A to 300D, for example, four mobile stations 200A to 200D, and a centralized control station 400. The mobile stations 200A to 200D have, for example, a massive antenna provided with four types of antenna elements 210A to 210D. The base stations 300A to 300D have, for example, a massive antenna including four types of antenna elements 310A to 310D and the like. The number of antenna elements of the massive antenna is not limited to four, and can be changed as appropriate. The total number of antennas used in the base stations 300A to 300D of the entire wireless system 100 is 16, but the total number of antennas is set to 8 in order to reduce power consumption.

The mobile station 200A calculates the received electric energy R11 of the antenna element 310A of the base station 300A, the received electric energy R21 of the antenna element 310B, the received electric energy R31 of the antenna element 310C, and the received electric energy R41 of the antenna element 310D. The mobile station 200B calculates the received electric energy R12 of the antenna element 310A of the base station 300B, the received electric energy R22 of the antenna element 310B, the received electric energy R32 of the antenna element 310C, and the received electric energy R42 of the antenna element 310D. The mobile station 200C calculates the received electric energy R13 of the antenna element 310A of the base station 300C, the received electric energy R23 of the antenna element 310B, the received electric energy R33 of the antenna element 310C, and the received electric energy R43 of the antenna element 310D. The mobile station 200D calculates the received electric energy R14 of the antenna element 310A of the base station 300D, the received electric energy R24 of the antenna element 310B, the received electric energy R34 of the antenna element 310C, and the received electric energy R44 of the antenna element 310D.

The mobile station 200A transmits the received electric energy R11, R21, R31 and R41 to the base station 300A by PUCCH. The mobile station 200B transmits the received power amounts R12, R22, R32 and R42 to the base station 300B by PUCCH. The mobile station 200C transmits the received electric energy R13, R23, R33 and R43 to the base station 300C by PUCCH. The mobile station 200D transmits the received power amounts R14, R24, R34 and R44 to the base station 300D by PUCCH.

Further, the centralized control station 400 collects the received power amount for each antenna element 310 for each mobile station 200 from each base station 300A to 300D. The centralized control station 400 calculates the average received power amount of the antenna element 310A based on the received power amounts R11, R12, R13 and R14 for each antenna element 310A. The average received power amount of the antenna element 310A is, for example, 20 dB. Further, the centralized control station 400 calculates the average received power amount of the antenna element 310B based on the received power amounts R21, R22, R23 and R24 for each antenna element 310B. The average received power amount of the antenna element 310B is, for example, 10 dB.

The centralized control station 400 calculates the average received power amount of the antenna element 310C based on the received power amounts R31, R32, R33 and R34 for each antenna element 310C. The average received power amount of the antenna element 310C is, for example, 10 dB. Further, the centralized control station 400 calculates the average received power amount of the antenna element 310D based on the received power amounts R41, R42, R43 and R44 for each antenna element 310D. The average received power amount of the antenna element 310D is, for example, 5 dB. The centralized control station 400 is based on the ratio (20:10: 10: 5) of the received power amount of the antenna element 310A: the received power amount of the antenna element 310B: the received power amount of the antenna element 310C: the received power amount of the antenna element 310D. , The antenna element 310 is distributed. Assuming that the total number of antennas of the base stations 300A to 300D is 8, the antenna element 310A used in the entire wireless system 100 is 4, the antenna element 310B is 2, the antenna element 310C is 2, and the antenna element 310D is 1. It becomes. The centralized control station 400 uses an antenna distribution algorithm to generate antenna distribution information for each base station 300 based on the number of antenna elements used for each antenna element 310 used in the entire wireless system 100, and the antenna distribution information is used for each base. Send to station 300.

FIG. 21 is a flowchart showing an example of the processing operation of the centralized control station 400 related to the sixth antenna control processing. In FIG. 21, the centralized control station 400 determines whether or not downlink quality information has been received from all the base stations 300 (step S101). When the centralized control station 400 receives downlink quality information from all the base stations 300 (affirmation in step S101), the centralized control station 400 calculates the average received power amount of the entire wireless system 100 for each antenna element 310 from the received power amount for each antenna element 310. (Step S102).

The centralized control station 400 calculates the number of antenna elements used for each antenna element 310 from the average received power amount of the entire wireless system 100 for each antenna element 310 (step S103). The centralized control station 400 transmits antenna distribution information including the number of antenna elements used for each antenna element 310 to the base station 300 (step S104), and ends the processing operation shown in FIG. 21. When the centralized control station 400 does not receive the downlink quality information from all the base stations 300 (denial in step S101), the centralized control station 400 ends the processing operation shown in FIG. 21.

The centralized control station 400 collects the received power amount of each antenna element 210 for each mobile station 200 in the wireless system 100. The centralized control station 400 calculates the average received power amount for each antenna element 210. The centralized control station 400 calculates the number of antenna elements used for each antenna element 310 based on the ratio of the average received power amount of the antenna elements 210. The centralized control station 400 notifies each base station 300 of the antenna distribution information of each base station 300 based on the number of antenna elements used for each antenna element 310. As a result, the centralized control station 400 can change the antenna 310 used by each base station 300 according to the actual usage status of the mobile station 200, for example, the average received power amount for each antenna element 210. Then, the throughput of wireless communication between the mobile station 200 and the base station 300 is improved.

As the antennas 11 (41) of Examples 1 to 5, polarized antennas such as the V-polarized antenna 11B (41B) and the H-polarized antenna 11A (41A) are exemplified. However, the present invention is not limited to these polarized antennas, and can be applied to a wireless system using a plurality of different antennas. Therefore, an embodiment thereof will be described below as the wireless system 1C of the seventh embodiment. By assigning the same reference numerals to the same configurations as those in the first embodiment, the description of the overlapping configurations and operations will be omitted.

The antenna 11 of the mobile station 2 has a first antenna and a second antenna different from the first antenna. The antenna 41 of the base station 3 has a first antenna and a second antenna. The centralized control station 4 collects the traffic amount for each mobile station 2. FIG. 22 is a flowchart showing an example of the processing operation of the centralized control station 4 related to the seventh antenna control processing. In FIG. 22, the third processor 73 in the centralized control station 4 determines whether or not downlink quality information has been received from all the base stations 3 (step S111). The downlink quality information includes the received power amount of the first antenna and the received power amount of the second antenna for each mobile station 2, and the traffic amount Tr for each mobile station 2.

When the third processor 73 receives downlink quality information from all the base stations 3 (step S111 affirmative), the third processor 73 compares the received power amount of each antenna 11 for each mobile station 2 (step S112). The third processor 73 compares the received power amount of the first antenna with the received power amount of the second antenna for each mobile station 2. The third processor 73 extracts the traffic amount Tr for each mobile station 2 (step S113).

In the third processor 73, the received power amount of the first antenna is better for each mobile station 2 based on the comparison result between the received power amount of the first antenna and the received power amount of the second antenna. The number N4 of the mobile station 2 is counted (step S114). Further, the third processor 73 counts the number N5 of the mobile stations 2 having a better received power amount of the second antenna based on the comparison result (step S115).

The third processor 73 counts the number NX1 of the mobile stations 2 whose traffic amount Tr is equal to or less than the predetermined traffic amount Trth among the number N4 of the mobile stations 2 of the first antenna (step S116). The third processor 73 counts the number NX2 of the mobile stations 2 whose traffic amount Tr is equal to or less than the predetermined traffic amount Trth among the number N5 of the mobile stations 2 of the second antenna (step S117).

The third processor 73 calculates the number of first antennas used in the entire wireless system 1C based on {N × N4 / (N4 + N5)} -NX1 × Nsave (step S118). Nsave corresponds to a predetermined reduction value of the number of antennas, and is calculated by, for example, the total number of antennas N / the number of mobile stations 2. Further, the third processor 73 calculates the number of second antennas used in the entire wireless system 1C based on {N × N5 / (N4 + N5)} -NX2 × Nsave (step S119). The third processor 73 transmits control information including the number of used antennas of the first antenna and the number of used antennas of the second antenna to the base station 3 (step S120), and ends the processing operation shown in FIG. 22. The centralized control station 4 generates antenna distribution information of each base station 3 by using an antenna distribution algorithm based on the number of used antennas of the first antenna and the number of antennas used of the second antenna, and the antenna distribution information. Is transmitted to each base station 3. Each base station 3 sets the number of antennas 41 to be used based on the antenna distribution information from the centralized control station 4. When the third processor 73 does not receive the downlink quality information from all the base stations 3 (denial in step S111), the third processor 73 ends the processing operation shown in FIG. 22.

The centralized control station 4 calculates the received power amount of each antenna 11 for each mobile station 2 in the wireless system 1C, and counts the number N4 of the mobile stations 2 having a better received power amount of the first antenna. Further, the centralized control station 4 counts the number N5 of the mobile stations 2 having a better received power amount of the second antenna. The centralized control station 4 counts the number NX1 of the mobile stations 2 whose traffic amount Tr is equal to or less than the predetermined traffic amount Trth among the number N4 of the mobile stations 2 of the first antenna. The centralized control station 4 counts the number NX2 of the mobile stations 2 whose traffic amount Tr is equal to or less than the predetermined traffic amount Trth among the number N5 of the mobile stations 2 of the second antenna. The centralized control station 4 calculates the number of first antennas used in the entire wireless system 1 based on {N × N4 / (N4 + N5)} -NX1 × Nsave. The centralized control station 4 calculates the number of second antennas used in the entire wireless system 1C based on {N × N5 / (N4 + N5)} -NX2 × Nsave. The centralized control station 4 notifies each base station 3 of the antenna distribution information of each base station 3 based on the number of used antennas of the first antenna and the number of used antennas of the second antenna. As a result, the centralized control station 4 uses the antenna of each base station 3 according to the actual usage status of the mobile station 2, for example, the received power amount of the first antenna, the received power amount of the second antenna, and the traffic amount. Can be changed. Then, the throughput of wireless communication between the mobile station 2 and the base station 3 is improved.

Note that FIG. 8 illustrates a format configuration of the PUCCH in which the mobile station 2 transmits the PUCCH to which the downlink quality information is added for each polarization method to the base station 3. However, it is not limited to the PUCCH shown in FIG. 8, and can be changed as appropriate. FIG. 23 is an explanatory diagram showing an example of a PUCCH format configuration to which reception quality information is added for each polarization method. The PUCCH shown in FIG. 23 has an identification number for identifying the first antenna (H-polarized antenna), reception quality information (downstream quality information: CQI) of the first antenna, and a second antenna (V-polarized antenna). ), And the reception quality information (downstream quality information: CQI) of the second antenna.

Further, each component of each of the illustrated parts does not necessarily have to be physically configured as shown in the figure. That is, the specific form of distribution / integration of each part is not limited to the one shown in the figure, and all or part of them may be functionally or physically distributed / integrated in any unit according to various loads and usage conditions. Can be configured.

Further, various processing functions performed by each device are performed on a CPU (Central Processing Unit) (or a microcomputer such as an MPU (Micro Processing Unit) or an MCU (Micro Controller Unit)) in whole or in any part thereof. You may try to do it. Further, various processing functions may be executed in whole or in any part on a program analyzed and executed by a CPU (or a microcomputer such as an MPU or MCU) or on hardware by wired logic. Needless to say.

1 Wireless system 2 Mobile station 3 Base station 4 Centralized control station 11 Antenna 11A H-polarized antenna 11B V-polarized antenna 41 Antenna 41A H-polarized antenna 41B V-polarized antenna 81 Collecting unit 82 Calculation unit 83 Determination unit 84 Setting unit

Claims (8)

A control device that controls a base station that wirelessly connects to a mobile station.
A collection unit that collects the received power amount of each antenna type for each mobile station from the base station, and
Used in the base station based on the number of mobile stations of the antenna type having the larger received power amount and the number of mobile stations of the antenna type having the smaller received power amount collected by the collecting unit. A decision unit that determines the usage ratio of the antenna type, and
A control device comprising a setting unit for setting the usage ratio of the antenna type determined by the determination unit to the base station. The decision-making part
The power difference of the received power amount of each antenna type is calculated for each mobile station, and among the antenna types of the mobile station whose power difference is a predetermined amount or more, the mobile station of the antenna type having the larger received power amount A request having a calculation unit for calculating the number of units, and determining the usage ratio of the antenna type used in the base station based on the number of mobile stations for each antenna type calculated by the calculation unit. Item 1. The control device according to Item 1. The decision-making part
The fluctuation amount of the received power amount within a predetermined period of each antenna type is calculated for each mobile station, and among the antenna types of the mobile station whose fluctuation amount is less than the predetermined fluctuation amount, the antenna type having the smaller fluctuation amount. It has a calculation unit that calculates the number of mobile stations in the above, and determines the usage ratio of the antenna type used in the base station based on the number of mobile stations for each antenna type calculated by the calculation unit. The control device according to claim 1. The antenna type is
Any one of claims 1 to 3 , wherein the information is for distinguishing at least the first polarization antenna and the second polarization antenna having a polarization method different from that of the first polarization antenna. The control device described in. The antenna type is
The control device according to any one of claims 1 to 3 , wherein the information is information for identifying each antenna element among a plurality of antenna elements. The received power amount for each antenna type is
The control device according to any one of claims 1 to 3 , wherein the mobile station transmits uplink control information to the base station. This is an antenna setting method executed by a control device that controls a base station that is wirelessly connected to a mobile station.
The control device is
The amount of received power for each antenna type for each mobile station is collected from the base station, and the amount of received power is collected from the base station.
The usage ratio of the antenna type used in the base station based on the number of collected mobile stations of the antenna type having the larger received power amount and the number of mobile stations of the antenna type having the smaller received power amount. Decide,
An antenna setting method comprising executing a process of setting a determined usage ratio of the antenna type to the base station. A wireless system having a mobile station, a base station wirelessly connected to the mobile station, and a control device for controlling the base station.
The mobile station
It has a first transmitter that collects the received power amount for each antenna type and transmits the collected received power amount to the base station as uplink control information.
The base station is
It has a second transmission unit that transmits the received power amount of each antenna type for each mobile station collected from the mobile station to the control device.
The control device is
A collection unit that collects the received power amount of each antenna type for each mobile station from the base station, and
The usage ratio of the antenna type used in the base station based on the number of collected mobile stations of the antenna type having the larger received power amount and the number of mobile stations of the antenna type having the smaller received power amount. And the decision-making part that decides
A wireless system comprising a setting unit for setting a determined usage ratio of the antenna type to the base station.

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