JP2006279902A - Communication apparatus and calibration table generation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a decrease in communication channels that can be used for communication during calibration weight calculation processing.
A temperature measuring unit 72 for measuring an environmental temperature of the communication device and a calibration weight for each antenna 81 calculated by a predetermined calibration weight calculation process are associated with the measured environmental temperature. A calibration weight storage unit 73a for storing the calibration weight, a calibration weight selection unit 74a for reading the calibration weight stored in the calibration weight storage unit 73a in association with the measured environmental temperature, and the calibration weight reading means And a transmission / reception unit 71 for performing communication signal calibration processing based on the calibration weight read out by the communication device.
[Selection] Figure 3

Description

  The present invention relates to a communication device and a calibration table generation method.

  Conventionally, in a base station apparatus that uses a plurality of antennas as adaptive array antennas, the transmission characteristics related to the amplitude and phase of the communication signal transmitted from each antenna are equivalent to the reception characteristics related to the amplitude and phase of the communication signal received by each antenna. Thus, the amplitude and phase of the communication signal to be transmitted are adjusted for each antenna. In this way, the directivity of the adaptive array antenna can be matched to the mobile station apparatus that is the transmission source of the received communication signal.

  By the way, a base station apparatus of a recent mobile communication system performs the above adjustment by digital signal processing. That is, when adjusting the amplitude and phase of a communication signal, before the D / A conversion of the communication signal to be transmitted is performed, the communication signal received by each antenna is based on the amplitude and phase after the A / D conversion. To make adjustments. For this reason, in the base station apparatus in which the antenna is separated from the base station apparatus main body including the transmission / reception unit that performs A / D conversion and D / A conversion of the communication signal, the adjustment is performed in the base station apparatus main body. Will be done. On the other hand, a power amplifier for transmitting a communication signal from an antenna and a preamplifier for amplifying a received signal are installed in the immediate vicinity of the antenna, not the base station apparatus main body. In this case, since the length of the cable connecting the antenna and the base station apparatus main body is different for each antenna, the amplitude and phase of the transmitted / received communication signal varies for each antenna, and the effect of the adjustment is impaired. May be.

  In view of such circumstances, the base station apparatus performs processing (calibration) for calibrating the amplitude and phase of the communication signal for each antenna. In this calibration, a calibration weight calculated by a predetermined calibration weight calculation process is used.

  For the calibration weight calculation process, one mobile station device as a calibration terminal is usually installed in the base station device. The input / output of the antenna of the calibration terminal is electrically coupled to each antenna of the base station apparatus by a coupler. For this reason, the calibration terminal receives the signal output from the coupler (that is, the downlink communication signal transmitted from the antenna), and causes the base station apparatus to receive the signal generated by itself as an uplink communication signal through each coupler. Can do.

  In the following description, the calibration terminal is a part that is installed integrally with the antenna away from the calibration unit, the antenna, and the base station main unit (usually including an amplifier circuit such as the power amplifier or preamplifier). Part. The antenna unit includes the plurality of antennas, and each antenna is connected to a transmission / reception unit and a calibration unit.

  First, regarding the uplink signal, the test signal (calibration signal) generated in the calibration unit is received by the transmission / reception unit as a communication signal via each antenna. The transmission / reception unit acquires the difference in amplitude and phase between the test signals received via each antenna.

  Next, for the downlink signal, a test signal (calibration signal) is generated in the transmission / reception unit, and is received as a communication signal by the calibration unit via each antenna included in the antenna unit. Each antenna is installed to transmit and receive the same signal, and the calibration unit synthesizes a test signal received via each antenna as a received signal, like a communication signal. On the other hand, in the calibration weight calculation process, since it is necessary to acquire the difference in amplitude and phase between signals received via each antenna, the transmission / reception unit transmits the test signal via only one antenna at a time. This is done for each antenna. The calibration unit acquires the difference in amplitude and phase between the test signals received via each antenna.

In the calibration weight calculation process, the calibration amount (calibration weight) for each antenna is calculated based on the amplitude and phase difference between the test signals obtained during reception and transmission. In the calibration, the amplitude and phase of the communication signal to be transmitted are calibrated based on the calibration weight calculated in this way. Patent Document 1 describes one example of such calibration.
JP 2003-234610 A

  By the way, in the conventional calibration weight calculation process, it is necessary to redo the calibration weight calculation process when the temperature (environment temperature) fluctuates in the surrounding environment of the base station apparatus. Since the electrical characteristics of the electronic components used in the transmission / reception circuit and amplification circuit provided in the base station device have temperature characteristics, when the environmental temperature changes, the amplitude and phase of the communication signals transmitted and received by each antenna are Change occurs. As a result, the phase and amplitude relationship between the antennas changes.

  Thus, conventionally, it has been necessary to redo the calibration weight calculation process triggered by a change in environmental temperature. However, in the calibration weight calculation process, the test signal is transmitted or received using the communication channel used for the communication signal. For this reason, every time the calibration weight calculation process is performed again, there is a problem that the number of communication channels that can be used for communication decreases.

  The present invention has been made in view of the above problems, and one of its purposes is to provide a communication channel that can be used for communication when the calibration weight calculation process is performed again in accordance with a change in the environmental temperature of the communication device. It is an object of the present invention to provide a communication device and a calibration weight table generation method that can prevent the decrease.

  A communication device according to the present invention for solving the above-described problem includes a transmission / reception unit and an antenna unit including at least one antenna connected to the transmission / reception unit, and the transmission / reception unit includes the at least one antenna. In a communication apparatus including a communication means for performing communication by transmitting and receiving signals via the environment temperature measuring means for measuring the environmental temperature of the communication apparatus, and each antenna calculated by a predetermined calibration weight calculation process Calibration weight storage means for storing the calibration weight for each of the calibration temperature in association with the environmental temperature measured by the environmental temperature measurement means, and the calibration weight in association with the environmental temperature measured by the environmental temperature measurement means. Calibration weight stored in the calibration weight storage means Calibration weight reading means for reading out data, and calibration means for performing a predetermined calibration process based on the calibration weight read out by the calibration weight reading means when the signal is transmitted by the communication means. It is further characterized by including.

  According to the present invention, since the calibration weight is stored in advance in association with the environmental temperature of the communication device, the calibration weight calculation process is performed when the calibration is performed again according to the change in the environmental temperature of the communication device. There is no need. For this reason, it is not necessary to transmit / receive test signals, and the number of communication channels that can be used for communication is not reduced.

  In the communication apparatus, whether the calibration weight stored in the calibration weight storage unit in association with the environmental temperature measured by the environmental temperature measurement unit can be read out by the calibration weight reading unit. In response, calibration control means for controlling the communication apparatus so as to calculate a calibration weight for each of the antennas by the predetermined calibration weight calculation process may be further included.

  By doing so, the calibration weight can be calculated when the calibration weight is not stored in association with the environmental temperature measured by the environmental temperature measuring means.

  In the communication apparatus, the communication unit performs communication using at least one communication channel, and is the calibration control unit used for the communication unit for each of the at least one communication channel? Determination means for determining whether or not the calibration control means uses a communication channel that is determined not to be used by the determination means, and performs a predetermined calibration weight calculation process to determine whether each of the antennas is used. The communication apparatus may be controlled to calculate a calibration weight for each.

  By doing so, when there is a communication channel in which calibration weights are not stored in association with the environmental temperature measured by the environmental temperature measuring means and there is an unused communication channel, the unused communication The calibration weight can be calculated using the channel.

  In the communication device, the environmental temperature measuring unit measures the environmental temperature of the transmitting / receiving unit and the environmental temperature of the antenna unit, and the calibration weight storage unit calculates the predetermined calibration weight. A calibration weight for each of the antennas calculated by the processing is stored in association with a combination of environmental temperatures measured by the environmental temperature measuring means when the calibration weight calculation processing is performed, The calibration weight reading means may read the calibration weight stored by the calibration weight storage means in association with the combination of temperatures measured by the environmental temperature measuring means.

  In many cases, the antenna unit and the transmission / reception unit are separated such that the antenna unit is at the top of the steel tower and the transmission / reception unit is at the base of the steel tower. In such a case, the temperatures of the antenna unit and the transmission / reception unit are often uncorrelated with each other. According to the present invention, the calibration weight is stored in association with the combination of the temperature of the antenna unit and the transmission / reception unit, so that an appropriate calibration weight is read even if the temperature of the antenna unit and the transmission / reception unit changes uncorrelated. Will be able to.

  In the communication apparatus, the calibration weight storage means includes change trend information indicating a change tendency of a combination of environmental temperatures measured by the environmental temperature measurement means when the predetermined calibration weight calculation process is performed. For each of the antennas calculated by the predetermined calibration weight calculation process, the environmental temperature measured by the environmental temperature measurement means when the calibration weight calculation process is performed. The calibration weight reading means acquires change tendency information indicating a change tendency of the combination of the environmental temperatures measured by the environmental temperature measurement means, and changes the acquired combination of the environmental temperatures. In association with trend information Reading a calibration weight to be stored by the serial calibration weight storing means, it is also possible.

  In this way, for example, even when the environmental temperature of the transmission / reception unit and the environmental temperature of the antenna unit are the same, different calibration weights are set according to the changing tendency of the environmental temperature of the transmission / reception unit and the environmental temperature of the antenna unit. It can be read out.

  Further, in the communication apparatus, the calibration weight storage means may perform a predetermined calibration for each device operation information indicating a state of operation of the device that changes the environmental temperature in at least one of the antenna unit and the transmission / reception unit. Calibration weight for each of the antennas calculated by the calculation weight calculation process, the calibration weight reading means acquires device operation information indicating the operation status of the device, and the acquired device operation The calibration weight stored by the calibration weight storage means may be read for information.

  When the transmission / reception unit and the antenna unit are separated from each other, for example, the temperature of the transmission / reception unit may decrease due to the operation of the FAN. In such a case, the ambient temperature of the transmission / reception unit and the antenna unit are greatly different depending on the presence or absence of the FAN operation. According to the present invention, at least one of the antenna unit and the transmission / reception unit stores the calibration weight for each presence / absence of the operation of the device that affects the environmental temperature. Therefore, the calibration weight is efficiently stored. be able to.

  The calibration weight table generation method according to the present invention includes an antenna unit, a transmission / reception unit, and an apparatus that affects at least one of the antenna unit or the transmission / reception unit and an environmental temperature. Calibration weight table for storing calibration weight for performing calibration in a communication apparatus in which the environmental temperature and the environmental temperature of the transmission / reception unit have a predetermined relationship for each piece of device operation information indicating whether the device is operating A calibration weight table generation method for generating device operating information indicating whether or not the device is operating, and acquiring an environmental temperature for acquiring at least one environmental temperature of the antenna unit or the transmitting / receiving unit Step and predetermined calibration weight calculation Calibration weight acquisition step for acquiring a calibration weight by performing processing, the acquired device operation information, the acquired environmental temperature, and the acquired calibration weight in association with each other in the calibration weight table And a calibration weight table writing step for writing to the storage area.

  By using the calibration weight table generated in this way, the device operation information and the environmental temperature of one of the antenna unit or the transmission / reception unit are acquired, and the other environmental temperature is not acquired. Thus, a calibration weight suitable for the environmental temperature of the communication device can be acquired.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a configuration diagram of a mobile communication system 1 according to the present embodiment. As shown in FIG. 1, the mobile communication system 1 includes a base station device 2, a mobile station device 3, and a communication network 4. In the mobile communication system 1, the base station device 2 and the mobile station device 3 communicate with each other wirelessly. The mobile station device 3 communicates with the communication network 4 via the base station device 2.

  As illustrated in FIG. 2, the base station device 2 includes a control unit 10, a storage unit 20, a network interface unit 30, a wireless communication unit 40, and a calibration unit 50.

  The control unit 10 includes a processing unit for executing a program stored in the storage unit 20, controls each unit of the base station apparatus 2, and executes processing related to a call and data communication.

  The storage unit 20 operates as a work memory of the control unit 10. The storage unit 20 holds programs and parameters related to various processes performed by the control unit 10.

  The network interface unit 30 is connected to the communication network 4 and receives an audio signal, a communication packet, and the like from the communication network 4 and outputs them to the control unit 10 or according to an instruction from the control unit 10. A packet or the like is transmitted to the communication network 4.

  The wireless communication unit 40 includes a plurality of antennas, and receives and demodulates a voice signal, a communication packet, and the like from the mobile station device 3 with each antenna, and outputs them to the control unit 10. Further, in accordance with an instruction input from the control unit 10, the audio signal or communication packet input from the control unit 10 is modulated and transmitted to the radio section via each antenna.

  Note that the wireless communication unit 40 is configured to perform communication using a plurality of communication channels. This communication channel uses at least one of a multiplexing unit such as a frequency channel that is a multiplexing unit of frequency division multiplexing, a time slot that is a multiplexing unit of time division multiplexing, a code that is a multiplexing unit of code division multiplexing, and the like. Is a communication unit. When communication with the mobile station apparatus 3 is performed, at least one of the communication channels is used.

  In addition, the wireless communication unit 40 performs communication using a space division multiple access (SDMA) by using the plurality of antennas as an adaptive array antenna. The space division multiplexing method is a method of adjusting the antenna directivity to the position where the mobile station device 3 exists by adjusting at least one of the amplitude or phase of communication signals transmitted from a plurality of antennas. In the space division multiplexing method, the same signal is transmitted and received by a plurality of antennas.

  The calibration unit 50 is a mobile station device 3 customized for performing a calibration weight calculation process. The calibration weight calculation process is a process for calculating a calibration weight that is used to reflect the power loss and delay that occur during signal transmission in the base station apparatus 2 in the amplitude and phase of the transmission signal. The calibration weight calculation process will be described in detail later.

  The mobile station apparatus 3 communicates with the base station apparatus 2 by receiving a signal wirelessly transmitted from the base station apparatus 2 and wirelessly transmitting the signal to the base station apparatus 2. Examples of the mobile station device 3 include a mobile phone terminal, a PHS terminal, and a wireless LAN terminal.

  In addition, in the communication performed between the base station apparatus 2 and the mobile station apparatus 3, the space division multiplexing method and the frequency division multiplexing method are used, and the time division duplex method (TDD, Time Division Duplex) is used. The In this time division duplex method, the same frequency channel transmits a signal (uplink signal) transmitted from the mobile station apparatus 3 to the base station apparatus 2 and a signal (downlink signal) transmitted from the base station apparatus 2 to the mobile station apparatus 3. ) And is used while being switched in time division.

  The communication network 4 is connected to a plurality of computers (not shown), and relays communication between each computer and the base station apparatus 2. Specifically, it may be an exchange network of a mobile communication system or a TCP / IP network.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described. FIG. 3 is a functional block diagram and hardware configuration diagram of the base station apparatus 2 according to the first embodiment. As shown in the figure, the base station apparatus 2 physically includes a base station apparatus main body 70, an antenna section 80, and a cable connecting them.

  The base station apparatus main body 70 and the antenna unit 80 are installed spatially separated. Specifically, the antenna unit 80 is arranged at the top of the steel tower, and the base station device main body 70 is arranged at the base of the steel tower. Since the base station apparatus main body 70 and the antenna section 80 are thus separated, signal loss in the base station apparatus 2 causes power loss and delay that occur during internal signal transmission. These power loss and delay are different for each antenna because the length of the cable connecting the antenna unit 80 and the base station apparatus main body unit 70 and the circuit through which the signal passes are different for each antenna. Moreover, these power loss and delay differ also for every frequency, and are the quantity which changes also with changes of surrounding environment, such as temperature.

  By the way, the base station apparatus 2 employs the space division multiplexing system as described above. For this reason, the base station apparatus 2 calculates a reception weight indicating an amount of difference between the antennas of the amplitude or phase of the received communication signal based on the amplitude or phase of the received communication signal. This calculation process is performed for each mobile station apparatus 3.

  Then, the transmission weight is calculated so as to match the directivity to the mobile station apparatus 3 estimated based on the reception weight. This calculation process is also performed for each mobile station apparatus 3. Then, by multiplying the communication signal for each antenna by the calculated transmission weight, at least one of the amplitude or phase of the communication signal is adjusted, and the directivity of the transmitted radio wave is matched to the mobile station apparatus 3.

  However, as described above, when signals are transmitted inside the base station apparatus 2, there are circuit elements that differ for each antenna, such as circuits and cables through which signals pass, and this causes different power loss and delay for each antenna. If the transmission weight is calculated based only on the reception weight, the directivity may not be suitable for the mobile station device 3 due to these power loss and delay. Therefore, in this embodiment, by transmitting and receiving a known calibration signal as a communication signal, a calibration weight calculation process for measuring these power loss and delay in advance is performed, and a calibration weight indicating the measurement result is obtained. This is reflected in the transmission weight. That is, when a communication signal is transmitted, a predetermined calibration process (calibration) relating to the amplitude or phase of the communication signal is performed based on the calibration weight.

  By the way, in transmitting and receiving the calibration signal, the calibration signal is transmitted and received via the antenna unit 80 between the portion of the radio communication unit 40 in the base station apparatus main body 70 and the calibration unit 50. In this case, the communication channel is used. For this reason, during the transmission / reception of the calibration signal, the communication channel used for the transmission / reception of the calibration signal cannot be used for the transmission / reception of the communication signal. In other words, radio resources that can be used for transmission / reception of communication signals decrease while transmission / reception of calibration signals is performed.

  In addition, as described above, the power loss and delay change with changes in the surrounding environment such as temperature. Moreover, this change varies from antenna to antenna. For this reason, it is necessary to perform a calibration weight calculation process every time the temperature changes, but radio resources are reduced as described above while the calibration signal is transmitted and received.

  Therefore, in the first embodiment, the environmental temperature of the base station device 2 and the calibration weight are associated with each other and stored in the calibration weight table. When the environmental temperature changes, the calibration weight stored in the calibration weight table is read in association with the changed environmental temperature. By doing in this way, it is made possible to acquire the calibration weight according to the temperature change without causing a decrease in radio resources.

  Hereinafter, specific description will be given with reference to FIGS. 3 to 5.

  The base station main unit 70 includes a transmission / reception unit 71, a temperature measurement unit 72, a calibration weight storage unit 73a, a calibration weight selection unit 74a, a calibration update unit 76, a wireless antenna calibration function unit 77a, and a radio resource information acquisition unit. 78 and a transmission / reception unit 79. The antenna unit 80 includes a plurality of antennas 81-i (i = 1 to n, n is the number of antennas) and a coupler 82-i corresponding to each of the antennas. The antenna unit 80 and the transmission / reception unit 71 are connected by a cable. The antenna unit 80 may include an amplifying unit installed between each antenna 81-i and the transmitting / receiving unit 71 (not shown).

  Note that the temperature measurement unit 72, the calibration weight selection unit 74a, the calibration update unit 76, the wireless antenna calibration function unit 77a, and the wireless resource information acquisition unit 78 are in the control unit 10, and the calibration weight storage unit 73a is in the storage unit 20. In addition, the transmission / reception unit 71, the antenna 81-i, and the coupler 82-i are included in the wireless communication unit 40, and the transmission / reception unit 79 is included in the calibration unit 50, respectively.

The transmission / reception unit 71 transmits and receives communication signals while using at least one of a plurality of communication channels for one communication. For this purpose, the communication data acquired by the control unit 10 is encoded / modulated, assigned to each communication channel, and then output to each antenna 81-i. The transmission / reception unit 71 holds the transmission weight w _Ti (i = 1 to n) for each antenna 81-i, and multiplies the communication signal for each antenna 81-i by the transmission weight. Specifically, as shown in Expression (1), the communication signal S (t) is multiplied by the transmission weight w _Ti for each antenna 81-i, and the communication signal S _i (t) corresponding to each antenna 81-i is obtained. )
S _i (t) = S (t) × w _Ti (1)

  The temperature measuring unit 72 includes a thermometer. Then, the ambient temperature of the base station apparatus main body 70 is measured by the thermometer and acquired as the ambient temperature of the transmission / reception unit 71. The temperature of the base station apparatus main body 70 measured in this way varies depending on external factors such as the outside air temperature and internal factors such as heat generated by the apparatus.

The calibration weight storage unit 73a stores a calibration weight table that associates the environmental temperature of the transmission / reception unit 71 with the calibration weight. The table shown in FIG. 4 is an example of this calibration weight table. In the calibration weight table shown in the figure, the environmental temperature of the transmission / reception unit 71 in the range of 5 ° C. and the calibration weight w _Ci are stored in association with each other. The calibration weight is stored for each antenna 81-i.

  The calibration weight selection unit 74 a acquires the environmental temperature of the transmission / reception unit 71 acquired by the temperature measurement unit 72. Then, a calibration weight stored in association with the acquired environmental temperature is selected from the calibration weights stored in the calibration weight table. The calibration weight for each selected antenna 81-i is output to the calibration updating unit 76.

  On the other hand, when the calibration weight selection unit 74a cannot select the calibration weight stored in association with the acquired environmental temperature, that is, the calibration weight is not stored in association with the acquired environmental temperature. The wireless antenna calibration function unit 77a is instructed to execute the calibration weight calculation process.

  The radio antenna calibration function unit 77a instructed to execute the calibration weight calculation process from the calibration weight selection unit 74a performs the calibration weight calculation process for each antenna 81-i. To control.

  Specifically, first, radio resources are secured so that the calibration weight calculation process can be executed. For this purpose, the radio resource information acquisition unit 78 determines whether or not each of the plurality of communication channels is used for transmission / reception of a communication signal in the transmission / reception unit 71, and acquires radio resource information indicating the result. To do. Then, the radio resource information acquisition unit 78 outputs the acquired radio resource information to the radio antenna calibration function unit 77a.

  The radio antenna calibration function unit 77a controls the transmission / reception unit 71 and the transmission / reception unit 79 to execute the calibration weight calculation process using a communication channel that is indicated as not being used based on the input radio resource information. To do.

  In this calibration weight calculation process, more specifically, the transmission / reception of calibration signals is divided into a downlink (transmission from the base station apparatus 2) signal and an uplink (reception at the base station apparatus 2) signal. And a calibration weight basic amount for each is calculated. The calibration weight basic amount is an amount indicating components relating to the upstream signal and the downstream signal of the calibration weight. In the calibration weight calculation process, the calibration weight is calculated based on the calibration weight basic amount of the upstream signal and downstream signal.

  First, the uplink signal will be described. In the uplink, the transmission / reception unit 79 generates a known calibration signal. At this time, a calibration signal may be generated by selecting a calibration signal stored in the storage unit 20. Note that a tone signal (sine wave signal) or a burst signal (bit string) can be used as the calibration signal. Then, the transmission / reception unit 79 transmits the generated calibration signal to each coupler 82-i.

  The coupler 82-i electrically connects the communication line from the transmission / reception unit 71 to the antenna 81-i and the communication line from the transmission / reception unit 79 to the antenna 81-i. That is, the signal flowing through the communication line from the transmission / reception unit 71 to the antenna 81-i by the coupler 82-i also flows into the communication line from the transmission / reception unit 79 to the antenna 81-i. The signal that flows in the communication line that reaches -i also flows in the communication line that extends from the transmission / reception unit 71 to the antenna 81-i. For this reason, for example, a signal flowing from the transmission / reception unit 79 to the coupler 82-i can be received by the transmission / reception unit 71, and a signal flowing from the transmission / reception unit 71 to the antenna 81-i can be received by the transmission / reception unit 79.

  The transmission / reception unit 71 that has received the calibration signal thus generated by the transmission / reception unit 79 acquires the difference in phase and amplitude between the received calibration signal and the known calibration signal. Then, based on the acquired difference amount, a calibration weight basic amount of the uplink signal is calculated for each antenna 81-i.

  Next, the downlink signal will be described. In downlink, the transmission / reception unit 71 generates a known calibration signal and transmits it to each antenna 81-i. Also at this time, a calibration signal may be generated by selecting a calibration signal stored in the storage unit 20. Also, a tone signal (sine wave signal) or a burst signal (bit string) can be used for this calibration signal.

  The transmission / reception unit 79 receives the calibration signal generated by the transmission / reception unit 71 via the coupler 82-i. Then, the amount of difference in phase and amplitude between the received calibration signal and the known calibration signal is acquired. Based on the acquired difference amount, the transmission / reception unit 79 calculates a downlink signal calibration weight basic amount for each antenna 81-i.

  The radio antenna calibration function unit 77a calculates the calibration weight based on both the upstream signal and downstream signal calibration weight basic amounts calculated by the calibration weight calculation process executed as described above. Specifically, the radio antenna calibration function unit 77a calculates the calibration weight by calculating the ratio of the calibration weight basic amount of the uplink signal and the downlink signal. Then, the calculated calibration weight is output to the calibration update unit 76. Further, the environment temperature of the transmission / reception unit 71 acquired by the temperature measurement unit 72 when the calibration weight calculation process is executed is acquired, and the calibration weight obtained as a result of the executed calibration weight calculation process is obtained as the acquired environment Write to the calibration weight table in association with the temperature.

  The calibration update unit 76 updates the transmission weight held by the transmission / reception unit 71 with the calibration weight input from the calibration weight selection unit 74a. Specifically, the transmission weight for an antenna 81-i is updated with the calibration weight for the antenna 81-i. That is, it is possible to obtain a communication signal obtained by further adjusting at least one of the amplitude or phase of the communication signal by the calibration weight to the communication signal subjected to adjustment of at least one of the amplitude or phase of the communication signal by the transmission weight. Update the transmission weight.

More specifically, the calibration updating unit 76 updates the transmission weight w _Ri calculated in the space division multiplexing method with the calibration weight w _Ci according to the following equation (2), and sets the transmission weight w _Ti as described above. Have acquired.
w _Ti = w _Ri × w _Ci (2)

  As described above, in the first embodiment, when the environmental temperature is changed by associating the environmental temperature of the base station apparatus 2 with the calibration weight and storing them in the calibration weight table, the environment after the change is changed. The calibration weight stored in the calibration weight table in association with the temperature can be read out. In this way, a calibration weight corresponding to a temperature change can be acquired without causing a reduction in radio resources. Furthermore, since the calibration weight calculation process is executed when not stored, the calibration weight table can be enhanced.

  The calibration weight calculation process is executed not only when the calibration weight is stored in association with the environmental temperature of the transmission / reception unit 71 acquired by the temperature measurement unit 72 but also when a predetermined condition is met. It is good. Examples of the predetermined condition include that the elapsed time from the previous calibration has reached a predetermined time. In this case, the calibration weight calculation process is periodically performed.

  The processing according to the first embodiment will be described in more detail with reference to the processing flowchart of the base station device 2.

  FIG. 5 is a flowchart of processing of the base station apparatus 2 according to the first embodiment. As shown in the figure, first, temperature measurement is performed by the temperature measurement unit 72 (S100). Then, it is determined whether or not the measured temperature has changed by a predetermined amount or more (S101). If it is determined that there has been a change, the temperature measuring unit 72 outputs the measured temperature to the calibration weight selecting unit 74a. .

  The calibration weight selection unit 74a acquires the output temperature as the environmental temperature of the transmission / reception unit 71 (S102), and the calibration weight stored in the calibration weight table in association with the acquired environmental temperature of the transmission / reception unit 71. It is determined whether or not there is (S103). When such a calibration weight is stored, the calibration weight is read out and output to the calibration updating unit 76. On the other hand, if not stored, the calibration weight selection unit 74a instructs the wireless antenna calibration function unit 77a to perform calibration weight calculation processing.

  First, the radio antenna calibration function unit 77a secures radio resources for executing the calibration weight calculation process (S104). That is, an empty communication channel is acquired. When all the communication channels are used, it waits until any one of the communication channels becomes free or forcibly releases any one of the communication channels.

  Next, the radio antenna calibration function unit 77a controls the base station apparatus 2 to execute the calibration weight calculation process using the secured radio resource (S105). The wireless antenna calibration function unit 77a acquires a calibration weight that is a result of the executed calibration weight calculation process, and the transmission / reception unit 71 acquired by the temperature measurement unit 72 when the calibration weight calculation process is executed. The calibration weight table is updated with the ambient temperature and the acquired calibration weight (S106). Further, the acquired calibration weight is output to the calibration update unit 76.

  The calibration updating unit 76 updates the transmission weight held by the transmission / reception unit 71 with the input calibration weight (S107), thereby performing the communication signal calibration process using the calibration weight.

  As described above, the base station apparatus 2 according to the first embodiment generates the calibration weight table and updates the transmission weight.

[Second Embodiment]
Hereinafter, the second embodiment will be described. FIG. 6 is a functional block diagram and hardware configuration diagram of the base station apparatus 2 according to the second embodiment. As shown in the figure, the hardware configuration of the base station apparatus 2 according to the second embodiment is the same as that of the base station apparatus 2 according to the first embodiment, but the functional block is the first embodiment. A temperature measuring unit 83 is added to the antenna unit 80 of the base station apparatus 2 according to the above. The temperature measuring unit 83 is included in the control unit 10.

  In addition, the base station apparatus main body unit 70 includes a calibration weight storage unit 73b, a calibration weight selection unit 74b, instead of the calibration weight storage unit 73a, the calibration weight selection unit 74a, and the wireless antenna calibration function unit 77a. The wireless antenna calibration function unit 77b is included.

  As described above, the base station apparatus main body 70 and the antenna unit 80 are separated from each other. For this reason, each environmental temperature may change uncorrelated with each other.

  Therefore, in the second embodiment, a calibration weight table in which the combination of the environmental temperature of the transmission / reception unit 71, the combination of the environmental temperature of the antenna unit 80, and the calibration weight is used. Hereinafter, a specific description will be given with reference to FIGS.

  The temperature measuring unit 83 includes one thermometer. Then, the ambient temperature of the antenna unit 80 is measured and acquired by the thermometer. The temperature of the antenna unit 80 measured in this way varies depending on external factors such as the outside air temperature and internal factors such as heat generated by the device. In addition, although demonstrated as what contains only one thermometer here, it is good also as providing each thermometer for each antenna 81-i contained in the antenna part 80, for example.

The calibration weight table stored in the calibration weight storage unit 73b stores the calibration weight in association with the environmental temperature of the antenna unit 80 in addition to the environmental temperature of the transmission / reception unit 71. The table shown in FIG. 7 is an example of this calibration weight table. In the calibration weight table shown in the figure, the environmental temperature of the antenna unit 80 in the range of 5 ° C and the calibration weight w _Ci correspond to the environmental temperature of the transmission / reception unit 71 in the range of 5 ° C. It is memorized. The calibration weight is stored for each antenna 81-i.

  In addition, when the temperature measurement part 83 is provided with the thermometer about each antenna 81-i, the environmental temperature of the antenna part 80 measured about each antenna 81-i, the calibration weight about each antenna 81-i, and May be stored in the calibration weight table in association with each other.

  The calibration weight selection unit 74 b acquires the environmental temperature of the transmission / reception unit 71 acquired by the temperature measurement unit 72 and the environmental temperature of the antenna unit 80 acquired by the temperature measurement unit 83. Then, the calibration weight stored in association with the acquired combination of the two environmental temperatures is selected from the calibration weight stored in the calibration weight table. The calibration weight selection unit 74 b outputs the calibration weight for each selected antenna 81-i to the calibration update unit 76.

  On the other hand, the calibration weight selecting unit 74b stores the calibration weight in association with the acquired combination of the environmental temperature when the calibration weight stored in association with the acquired combination of the environmental temperature cannot be selected. If not, the wireless antenna calibration function unit 77b is instructed to execute the calibration weight calculation process.

  The radio antenna calibration function unit 77b instructed to execute the calibration weight calculation process from the calibration weight selection unit 74b controls the base station apparatus 2 to execute the calibration weight calculation process. The details of the calibration weight calculation process are the same as in the first embodiment.

  Then, the wireless antenna calibration function unit 77 b outputs the calculated calibration weight to the calibration update unit 76. Further, the environmental temperature of the transmission / reception unit 71 acquired by the temperature measurement unit 72 and the environmental temperature of the antenna unit 80 acquired by the temperature measurement unit 83 when the calibration weight calculation process is executed are acquired. Then, the calibration weight obtained as a result of the executed calibration weight calculation process is written in the calibration weight table in association with the acquired combination of the environmental temperatures.

  As described above, in the second embodiment, the combination of the environmental temperature of the transmission / reception unit 71 and the environmental temperature of the antenna unit 80 and the calibration weight are stored in the calibration weight table in association with each other. When either or both of the environmental temperatures change, it is possible to read the calibration weight stored in the calibration weight table in association with the combination of the environmental temperatures after the change. In this way, a calibration weight corresponding to a temperature change can be acquired without causing a reduction in radio resources. Furthermore, since the calibration weight calculation process is executed when not stored, the calibration weight table can be enhanced.

  The calibration weight is not stored in association with the combination of the environmental temperature of the transmission / reception unit 71 acquired by the temperature measurement unit 72 and the environmental temperature of the antenna unit 80 acquired by the temperature measurement unit 83. The calibration weight calculation process may be executed when the condition is satisfied. Examples of the predetermined condition include that the elapsed time from the previous calibration has reached a predetermined time. In this case, the calibration weight calculation process is periodically performed.

  The process according to the second embodiment will be described in more detail with reference to the process flow diagram of the base station apparatus 2.

  FIG. 8 is a flowchart of processing of the base station apparatus 2 according to the second embodiment. As shown in the figure, first, temperature measurement is performed by the temperature measurement unit 72 (S200). Then, it is determined whether or not the measured temperature has changed by a predetermined amount or more (S201). If it is determined that there has been a change, the temperature measuring unit 72 outputs the measured temperature to the calibration weight selecting unit 74b. .

  The calibration weight selection unit 74b acquires the output temperature as the environmental temperature of the transmission / reception unit 71 (S202), and acquires the temperature measured by the temperature measurement unit 83 as the environmental temperature of the antenna unit 80 (S203). Then, it is determined whether there is a calibration weight stored in the calibration weight table in association with the acquired combination of the environmental temperature of the transmission / reception unit 71 and the environmental temperature of the antenna unit 80 (S204). When such a calibration weight is stored, the calibration weight is read out and output to the calibration updating unit 76. On the other hand, if not stored, the calibration weight selection unit 74b instructs the wireless antenna calibration function unit 77b to perform a calibration weight calculation process.

  First, the radio antenna calibration function unit 77b secures radio resources for executing the calibration weight calculation process (S205). Next, the radio antenna calibration function unit 77b controls the base station apparatus 2 to execute the calibration weight calculation process using the secured radio resource (S206). The wireless antenna calibration function unit 77b acquires a calibration weight that is a result of the executed calibration weight calculation process, and the transmission / reception unit 71 acquired by the temperature measurement unit 72 when the calibration weight calculation process is executed. The calibration weight table is updated with the combination of the environmental temperature of the antenna unit 80 acquired by the ambient temperature and the temperature measuring unit 83 and the acquired calibration weight (S207). Further, the acquired calibration weight is output to the calibration update unit 76.

  The calibration updating unit 76 updates the transmission weight held by the transmission / reception unit 71 with the input calibration weight (S208), thereby performing a communication signal calibration process using the calibration weight.

  As described above, the base station device 2 according to the second embodiment performs generation of the calibration weight table and update of the transmission weight.

[Third Embodiment]
Hereinafter, a third embodiment will be described. FIG. 9 is a functional block diagram and hardware configuration diagram of the base station apparatus 2 according to the third embodiment. As shown in the figure, the functional blocks and hardware configuration of the base station apparatus 2 according to the third embodiment are the same as those of the base station apparatus 2 according to the second embodiment, but the base station apparatus main body 70 Instead of the calibration weight storage unit 73b, the calibration weight selection unit 74b, and the wireless antenna calibration function unit 77b, a calibration weight storage unit 73c, a calibration weight selection unit 74c, a wireless antenna calibration function unit 77c, It is comprised including.

  In the third embodiment, a change tendency of the combination of the environmental temperature of the transmission / reception unit 71 and the environmental temperature of the antenna unit 80 is acquired and reflected in the calibration weight. This will be described below.

  FIG. 10 is a diagram illustrating a specific example of a change in the combination of the environmental temperature of the transmission / reception unit 71 and the environmental temperature of the antenna unit 80. The figure shows the case where the ambient temperature is forcibly increased after the ambient temperature is forcibly decreased. As shown in the figure, the path (hysteresis) in the change in the combination of temperatures differs between when rising and when falling. The amount of power loss and delay during signal transmission within the base station apparatus 2 varies not only with the combination of temperatures at the time of signal transmission, but also with the hysteresis of such a combination of environmental temperatures. For this reason, it is desirable to reflect the hysteresis of the combination of environmental temperatures in the calibration weight.

Therefore, in the calibration table according to the present embodiment, among the change tendencies indicated by such hysteresis, in particular, for rising and falling, the combination of the environmental temperature of the transmitting / receiving unit 71 and the environmental temperature of the antenna unit 80 and the calibration Deployment weight and w _Ci, in association with each other is stored. Of course, these may be stored for various other change tendencies, for example, when one rises and the other falls. Hereinafter, a specific description will be given with reference to FIGS. 9, 11, and 12.

The calibration weight table stored in the calibration weight storage unit 73c includes the environmental temperature of the transmission / reception unit 71 and the antenna for each change trend information indicating a change trend of the combination of the environmental temperature of the transmission / reception unit 71 and the environmental temperature of the antenna unit 80. The calibration weight is stored in association with the combination of the environmental temperatures of the unit 80. The table shown in FIG. 11 is an example of this calibration weight table. The calibration weight table shown in the figure includes a combination of the environmental temperature of the transmission / reception unit 71 in the range of 5 ° C. and the environmental temperature of the antenna unit 80 in the range of 5 ° C. for each change trend information, and calibration. The weight w _Ci is stored in association with each other. The calibration weight is stored for each antenna 81-i.

  The calibration weight selection unit 74c periodically acquires the environmental temperature of the transmission / reception unit 71 acquired by the temperature measurement unit 72 and the environmental temperature of the antenna unit 80 acquired by the temperature measurement unit 83. The calibration weight selection unit 74c stores the acquired environmental temperatures for a predetermined number of times. Further, the calibration weight selection unit 74c determines whether or not the acquired latest environmental temperature or the combination of environmental temperatures has changed by a predetermined amount or more as compared with the environmental temperature acquired last time. Specifically, when only the environmental temperature of the transmission / reception unit 71 changes by a predetermined amount or more, it may be determined that the predetermined amount or more has changed, or the combination of the environmental temperature of the transmission / reception unit 71 and the environmental temperature of the antenna unit 80 is determined. When environmental temperature information evaluated by a predetermined function changes by a predetermined amount or more, it may be determined that the amount has changed by a predetermined amount or more. For the environmental temperature information, for example, an average of two environmental temperatures can be used.

  If the calibration weight selection unit 74c determines that the latest environmental temperature or combination of environmental temperatures acquired has changed by a predetermined amount or more compared to the environmental temperature acquired last time, the stored past environmental temperature The change tendency information of the combination of environmental temperatures is acquired based on the combination of and the latest combination of environmental temperatures.

  The calibration weight selection unit 74c selects, from the calibration weights stored in the calibration weight table, the calibration weight stored in association with the acquired combination of the two environmental temperatures and the change tendency information thereof. Then, the selected calibration weight is output to the calibration update unit 76.

  On the other hand, the calibration weight selection unit 74c cannot select the calibration weight stored in association with the acquired combination of the environmental temperature and the change tendency information thereof, that is, the acquired combination of the environmental temperature and the change tendency information thereof. If the calibration weight is not stored in association with, the wireless antenna calibration function unit 77c is instructed to execute the calibration weight calculation process.

  The radio antenna calibration function unit 77c instructed to execute the calibration weight calculation process from the calibration weight selection unit 74c controls the base station apparatus 2 to execute the calibration weight calculation process. The details of the calibration weight calculation process are the same as in the first embodiment. The wireless antenna calibration function unit 77 c outputs the calculated calibration weight to the calibration update unit 76.

  The wireless antenna calibration function unit 77c periodically acquires and acquires the environmental temperature of the transmission / reception unit 71 acquired by the temperature measurement unit 72 and the environmental temperature of the antenna unit 80 acquired by the temperature measurement unit 83. These environmental temperatures are stored for a predetermined number of times. The wireless antenna calibration function unit 77c acquires change tendency information of the combination of the environmental temperatures based on the acquired combination of the latest environmental temperatures and the stored combination of the past environmental temperatures. Then, when the calibration weight calculation process is executed, the environmental temperature of the transmission / reception unit 71 acquired by the temperature measurement unit 72, the environmental temperature of the antenna unit 80 acquired by the temperature measurement unit 83, the acquired change trend information, The calculated calibration weight is associated and written to the calibration weight table.

  As described above, in the third embodiment, the combination of the environmental temperature of the transmission / reception unit 71 and the environmental temperature of the antenna unit 80 and the change tendency thereof, and the calibration weight are associated and stored in the calibration weight table. Thus, for example, even when the environmental temperature of the transmission / reception unit 71 and the environmental temperature of the antenna unit 80 are the same, different calibration weights depending on the change tendency of the environmental temperature of the transmission / reception unit 71 and the environmental temperature of the antenna unit 80. Can be read out.

  The process according to the above third embodiment will be described in more detail with reference to the process flow diagram of the base station apparatus 2.

  FIG. 12 is a flowchart of processing of the base station apparatus 2 according to the third embodiment. As shown in the figure, first, temperature measurement is performed by the temperature measurement unit 72 (S300). Then, it is determined whether or not the measured temperature has changed by a predetermined amount or more (S301). If it is determined that there has been a change, the temperature measuring unit 72 outputs the measured temperature to the calibration weight selecting unit 74c. .

  The calibration weight selection unit 74c acquires the output temperature as the environmental temperature of the transmission / reception unit 71 (S302), and acquires the temperature measured by the temperature measurement unit 83 as the environmental temperature of the antenna unit 80 (S303). Then, based on the stored environmental temperature of the transmission / reception unit 71 and the environmental temperature of the antenna unit 80, change tendency information indicating a change tendency of the combination of the environmental temperatures is acquired (S304). Then, it is determined whether or not there is a calibration weight stored in the calibration weight table in association with the acquired combination of the environmental temperature of the transmission / reception unit 71 and the environmental temperature of the antenna unit 80 and the acquired change tendency information. (S305). When such a calibration weight is stored, the calibration weight is read out and output to the calibration updating unit 76. On the other hand, if not stored, the calibration weight selection unit 74c instructs the wireless antenna calibration function unit 77c to perform a calibration weight calculation process.

  First, the radio antenna calibration function unit 77c secures radio resources for executing the calibration weight calculation process (S306). Next, the radio antenna calibration function unit 77c controls the base station apparatus 2 to execute the calibration weight calculation process using the secured radio resource (S307). The wireless antenna calibration function unit 77c acquires a calibration weight that is a result of the executed calibration weight calculation process. The combination of the environmental temperature of the transmission / reception unit 71 acquired by the temperature measurement unit 72 and the environmental temperature of the antenna unit 80 acquired by the temperature measurement unit 83 when the calibration weight calculation process is executed, and the change tendency thereof The calibration weight table is updated with the information and the acquired calibration weight (S308). Further, the acquired calibration weight is output to the calibration update unit 76.

  The calibration updating unit 76 updates the transmission weight held by the transmission / reception unit 71 with the input calibration weight (S309), thereby performing the communication signal calibration process using the calibration weight.

  As described above, the base station apparatus 2 according to the third embodiment generates the calibration weight table and updates the transmission weight.

[Fourth Embodiment]
Hereinafter, a fourth embodiment will be described. FIG. 13 is a functional block diagram and hardware configuration diagram of the base station apparatus 2 according to the fourth embodiment. As shown in the figure, the hardware configuration of the base station apparatus 2 according to the fourth embodiment is the same as that of the base station apparatus 2 according to the third embodiment. A device operation information acquisition unit 75 is added to the base station device main body 70 of the base station device 2 according to the embodiment. The device operation information acquisition unit 75 is included in the control unit 10.

  In addition, the base station apparatus main body unit 70 includes a calibration weight storage unit 73d, a calibration weight selection unit 74d, instead of the calibration weight storage unit 73c, the calibration weight selection unit 74c, and the wireless antenna calibration function unit 77c. A wireless antenna calibration function unit 77d.

  In the fourth embodiment, a FAN (not shown) is installed in the base station apparatus main body 70. The FAN functions as a device that changes the environmental temperature of the transmission / reception unit 71. The relationship between the device operation information indicating the status of the FAN operation (in this case, whether the FAN is operating) and the environmental temperature will be described with reference to FIG. 10 again. In the fourth embodiment, the environmental temperature of the antenna unit 80 and the environmental temperature of the transmitting / receiving unit 71 have a predetermined relationship for each piece of device operation information, as in the case where the change factor of the environmental temperature is mainly the outside air temperature. It is assumed that. As a specific example, for example, the relationship between the environmental temperature of the antenna unit 80 and the environmental temperature of the transmission / reception unit 71 is indicated by a constant function. This function indicates that the FAN is operating according to the device operation information. There are cases where the case is different from the case where it is indicated that it is not operating.

As described in the description of the third embodiment, the path (hysteresis) in the change in the combination of the environmental temperature of the transmission / reception unit 71 and the environmental temperature of the antenna unit 80 is different between rising and falling, but under the above assumptions This hysteresis has a certain relationship for each FAN “ON” or “OFF”. Therefore, in the present embodiment, the environmental temperature of the transmission / reception unit 71 and the calibration weight w _Ci are associated with each other and stored in the calibration weight table for each “ON” or “OFF” of the FAN. The calibration weight reflecting the ambient temperature of the antenna unit 80 can be stored without acquiring the ambient temperature. Hereinafter, this will be specifically described with reference to FIGS.

The calibration weight table stored in the calibration weight storage unit 73d stores the calibration weight in association with the environmental temperature of the transmission / reception unit 71 for each device operation information. The table shown in FIG. 14 is an example of this calibration weight table. The calibration weight table shown in the figure includes device operation information indicating whether the FAN is “ON” or “OFF”, the environmental temperature of the transmission / reception unit 71 in a range of 5 ° C., the calibration weight w _Ci , Are stored in association with each other. The calibration weight is stored for each antenna 81-i.

  The calibration weight selection unit 74d acquires the environmental temperature of the transmission / reception unit 71 acquired by the temperature measurement unit 72. The device operation information acquisition unit 75 acquires device operation information by confirming the operation state of the FAN, and the calibration weight selection unit 74d acquires the device operation information from the device operation information acquisition unit 75. .

  Then, the calibration weight selection unit 74d selects a calibration weight stored in association with the acquired device operation information and the environmental temperature of the transmission / reception unit 71 from the calibration weight stored in the calibration weight table. Then, the selected calibration weight is output to the calibration update unit 76.

  On the other hand, the calibration weight selection unit 74d cannot select the calibration weight stored in association with the acquired device operation information and the environmental temperature of the transmission / reception unit 71, that is, the acquired device operation information and the transmission / reception unit 71. When the calibration weight is not stored in association with the environmental temperature, the wireless antenna calibration function unit 77d is instructed to execute the calibration weight calculation process.

  The wireless antenna calibration function unit 77d instructed to execute the calibration weight calculation process from the calibration weight selection unit 74d controls the base station apparatus 2 to execute the calibration weight calculation process. The details of the calibration weight calculation process are the same as in the first embodiment. The wireless antenna calibration function unit 77d outputs the calculated calibration weight to the calibration update unit 76.

  In addition, the wireless antenna calibration function unit 77d acquires the environmental temperature of the transmission / reception unit 71 acquired by the temperature measurement unit 72 and executes the device operation information from the device operation information acquisition unit 75 when the calibration weight calculation process is executed. Get information. Then, the wireless antenna calibration function unit 77d writes the calculated calibration weight in the calibration weight table in association with the acquired environmental temperature and device operation information of the transmission / reception unit 71.

  As described above, in the fourth embodiment, by storing the device operation information, the environmental temperature of the transmission / reception unit 71, and the calibration weight in association with each other in the calibration weight table, for example, the antenna unit 80 The calibration weight suitable for the environmental temperature of the entire base station apparatus 2 can be read without acquiring the environmental temperature.

  In addition, although the case where the apparatus which affects the environmental temperature of the transmission / reception part 71 was used was demonstrated here, even if it uses the apparatus which affects the environmental temperature of the antenna part 80, it is the same. Alternatively, the environmental temperature of the antenna unit 80 may be stored as the environmental temperature stored in the calibration weight table, and the calibration weight may be read by acquiring the environmental temperature of the antenna unit 80 when reading the calibration weight.

  The processing according to the above fourth embodiment will be described in more detail with reference to the processing flowchart of the base station device 2.

  FIG. 15 is a flowchart of processing of the base station apparatus 2 according to the fourth embodiment. As shown in the figure, first, temperature measurement is performed by the temperature measurement unit 72 (S400). Then, it is determined whether or not the measured temperature has changed by a predetermined amount or more (S401). If it is determined that there has been a change, the temperature measuring unit 72 outputs the measured temperature to the calibration weight selecting unit 74d. .

  The calibration weight selection unit 74d acquires the output temperature as the environmental temperature of the transmission / reception unit 71 (S402). In addition, device operation information indicating the operation state of the FAN is acquired (S403). Then, the calibration weight selection unit 74d determines whether there is a calibration weight stored in the calibration weight table in association with the acquired environmental temperature and device operation information of the transmission / reception unit 71 (S404). When such a calibration weight is stored, the calibration weight is read out and output to the calibration updating unit 76. On the other hand, if not stored, the calibration weight selection unit 74d instructs the wireless antenna calibration function unit 77d to perform a calibration weight calculation process.

  The radio antenna calibration function unit 77d first secures radio resources for executing the calibration weight calculation process (S405). Next, the radio antenna calibration function unit 77d controls the base station apparatus 2 to execute the calibration weight calculation process using the secured radio resource (S406). The wireless antenna calibration function unit 77d acquires a calibration weight that is a result of the executed calibration weight calculation process. Then, the environmental temperature of the transmission / reception unit 71 acquired by the temperature measuring unit 72 when the calibration weight calculation process is executed, the device operation information when the calibration weight calculation process is executed, the acquired calibration weight, Thus, the calibration weight table is updated (S407). Further, the acquired calibration weight is output to the calibration update unit 76.

  The calibration updating unit 76 updates the transmission weight held by the transmission / reception unit 71 with the input calibration weight (S408), thereby performing the communication signal calibration process using the calibration weight.

  As described above, the base station apparatus 2 according to the fourth embodiment generates the calibration weight table and updates the transmission weight.

  The present invention is not limited to the above embodiment.

  For example, the calibration weight table according to the second embodiment may be stored for each piece of device operation information according to the fourth embodiment. When the transmission / reception unit and the antenna unit are separated from each other, for example, the temperature of the transmission / reception unit may decrease due to the operation of the FAN. In such a case, the ambient temperature of the transmission / reception unit and the antenna unit are greatly different depending on the presence or absence of the FAN operation. By doing so, the calibration weight is stored for each operation of the device that affects the environmental temperature in at least one of the antenna unit and the transmission / reception unit, so the calibration weight is efficiently stored. I can leave.

1 is a system configuration diagram of a mobile communication system according to an embodiment of the present invention. It is a system configuration | structure figure of the base station apparatus which concerns on embodiment of this invention. It is a figure which shows the functional block and hardware constitutions of the base station apparatus which concern on the 1st Embodiment of this invention. It is a figure which shows the calibration weight table which concerns on the 1st Embodiment of this invention. It is a flowchart of the process which concerns on the 1st Embodiment of this invention. It is a figure which shows the functional block and hardware constitutions of the base station apparatus which concern on the 2nd Embodiment of this invention. It is a figure which shows the calibration weight table which concerns on the 2nd Embodiment of this invention. It is a flowchart of the process which concerns on the 2nd Embodiment of this invention. It is a figure which shows the functional block and hardware constitutions of the base station apparatus which concern on the 3rd Embodiment of this invention. It is a figure which shows the change of the combination of the environmental temperature of the transmission / reception part in the base station apparatus which concerns on embodiment of this invention, and the environmental temperature of an antenna part. It is a figure which shows the calibration weight table which concerns on the 3rd Embodiment of this invention. It is a flowchart of the process which concerns on the 3rd Embodiment of this invention. It is a figure which shows the functional block and hardware constitutions of the base station apparatus which concern on the 4th Embodiment of this invention. It is a figure which shows the calibration weight table which concerns on the 4th Embodiment of this invention. It is a flowchart of the process which concerns on the 4th Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Mobile communication system, 2 Base station apparatus, 3 Mobile station apparatus, 4 Communication network, 10 Control part, 20 Storage part, 30 Network interface part, 40 Wireless communication part, 50 Calibration part, 70 Base station apparatus main-body part, 71, 79 Transmission / reception unit, 72 Temperature measurement unit, 73a, 73b, 73c, 73d Calibration weight storage unit, 74a, 74b, 74c, 74d Calibration weight selection unit, 75 Device operation information acquisition unit, 76 Calibration update unit, 77a, 77b, 77c, 77d Radio antenna calibration function unit, 78 radio resource information acquisition unit, 80 antenna unit, 81 antenna, 82 coupler, 83 temperature measurement unit.

Claims (7)

A transceiver unit, and an antenna unit including at least one antenna connected to the transceiver unit,
The transmission / reception unit includes communication means for performing communication by transmitting / receiving a signal via the at least one antenna.
In communication equipment,
Environmental temperature measuring means for measuring the environmental temperature of the communication device;
Calibration weight storage means for storing the calibration weight for each of the antennas calculated by a predetermined calibration weight calculation process in association with the environmental temperature measured by the environmental temperature measurement means;
Calibration weight reading means for reading the calibration weight stored in the calibration weight storage means in association with the environmental temperature measured by the environmental temperature measuring means;
When a signal is transmitted by the communication means, a calibration means for performing a predetermined calibration process based on the calibration weight read by the calibration weight reading means for the signal;
A communication device further comprising: The communication device according to claim 1,
Depending on whether the calibration weight stored in the calibration weight storage means in association with the environmental temperature measured by the environmental temperature measurement means can be read out by the calibration weight reading means. Calibration control means for controlling the communication apparatus so as to calculate a calibration weight for each of the antennas by a calibration weight calculation process;
A communication device further comprising: The communication device according to claim 2, wherein
The communication means communicates using at least one communication channel;
The calibration control means includes determination means for determining whether or not each of the at least one communication channel is used by the communication means,
The calibration control means uses the communication channel determined not to be used by the determination means, and calculates the calibration weight for each of the antennas by the predetermined calibration weight calculation processing. Control communication devices,
A communication device. The communication device according to any one of claims 1 to 3,
The environmental temperature measuring means measures the environmental temperature of the transmission / reception unit and the environmental temperature of the antenna unit, respectively.
The calibration weight storage means calculates the calibration weight for each of the antennas calculated by the predetermined calibration weight calculation process by the environmental temperature measurement means when the calibration weight calculation process is performed. Store it in association with the measured ambient temperature combination,
The calibration weight reading means reads a calibration weight stored by the calibration weight storage means in association with a combination of temperatures measured by the environmental temperature measuring means.
A communication device. The communication device according to claim 4, wherein
The calibration weight storage means performs the predetermined calibration for each change trend information indicating a change tendency of a combination of environmental temperatures measured by the environmental temperature measurement means when the predetermined calibration weight calculation process is performed. The calibration weight for each of the antennas calculated by the calculation of the calculation weight is stored in association with the combination of the environmental temperatures measured by the environmental temperature measurement means when the calibration weight calculation processing is performed. And
The calibration weight reading means acquires change tendency information indicating a change tendency of a combination of environmental temperatures measured by the environmental temperature measurement means, and associates the calibration weight with the acquired change tendency information of the environmental temperature. Read the calibration weight stored by the weight storage means,
A communication device. The communication device according to any one of claims 1 to 5,
The calibration weight storage means is calculated by a predetermined calibration weight calculation process for each piece of device operation information indicating the state of operation of the device that changes the environmental temperature in at least one of the antenna unit or the transmission / reception unit. The calibration weight for each of the antennas is stored,
The calibration weight reading unit acquires device operation information indicating the operation status of the device, and reads the calibration weight stored in the calibration weight storage unit for the acquired device operation information.
A communication device. An antenna unit, a transmission / reception unit, and an apparatus that affects at least one environmental temperature of the antenna unit or the transmission / reception unit,
A calibration weight for performing calibration in a communication device in which the environmental temperature of the antenna unit and the environmental temperature of the transmission / reception unit have a predetermined relationship for each device operation information indicating whether the device is operating is stored. A calibration weight table generation method for generating a calibration weight table,
Obtaining device operation information indicating presence or absence of operation of the device;
An environmental temperature acquisition step of acquiring at least one environmental temperature of the antenna unit or the transceiver unit;
A calibration weight acquisition step of acquiring a calibration weight by performing a predetermined calibration weight calculation process;
A calibration weight table writing step for writing the acquired device operation information, the acquired environmental temperature, and the acquired calibration weight in association with the calibration weight table;
A calibration weight table generation method comprising:

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