JP2002077978A - Apparatus and method for radio relay and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus and a method for relay and a recording medium wherein current consumption is reduced for the reduction of the power consumption of the apparatus. SOLUTION: The classification of a self-supporting station PS connected with the radio repeater HA is stored in an information storage portion 127 in advance. Referring to the self-supporting station classification information in the information storage portion 127, the interval of transmission of self-supporting station control carriers to be transmitted to the self-supporting station PS is set in real time by a transmission/reception timing control portion 125 (timing control step), and the timing of transmission of the self-supporting station control carriers to the self-supporting station PS is generated based on the interval of transmission.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio relay apparatus, a radio relay method, and a radio relay method for relaying radio communication between a public base station and a private terminal using a time division multiplex communication (TDMA) system. The present invention relates to a recording medium storing a program to be executed, and more particularly, to a wireless relay device, a wireless relay method, and a recording medium which reduce current consumption and reduce power consumption of the device.

[0002]

2. Description of the Related Art Conventionally, TDMA (time division multiplex communication);
In mobile communications of the Time Division Multiple Access (Time Division Multiple Access) method, if the distance between the public base station and the private terminal is far, radio waves may not reach sufficiently. There has been proposed a method of arranging a wireless relay device called an antenna to smoothly perform wireless communication connection. FIG. 9 is a configuration diagram illustrating the concept of a mobile communication system using such a wireless relay device. In the figure, the self-operating terminal PS at the time of standby uses communication control information (LCCH) intermittently transmitted from the public base station CS using a control channel in order to save power.
Is received via the wireless relay device HA, and subordinate synchronization is performed with respect to the public base station CS.

[0003] The number of control channels is limited in terms of the allocation of communication channels and the like. However, adjacent public base stations CS1 and CS2 generate mutual interference at the time of transmission by means of network control, timing between public base stations. Avoidance systematically due to installation distance and other factors. The wireless relay device HA may be used in each home in a place where radio waves from the public base station CS are difficult to reach, and a plurality of wireless relay devices HA1, HA2, HA may be provided for each public base station CS1.
3 may be used. Each wireless relay device HA1, H
A2 and HA3 are desired to relay the radio waves of a public base station with good radio wave conditions in order to improve the communication quality. Therefore, the wireless relay device HA3 at the boundary that can receive the radio waves of both the base stations CS1 and CS2 is: It is connected to a public base station CS1 having a high electric field strength level.

However, in the plurality of wireless relay devices HA1, HA2, and HA3 connected to the public base station CS1, the intermittent reception timings from the same public base station CS1 match, so that each of the wireless relay devices HA1, HA2, and HA3 has the same The transmission timings for the self-managed terminals PS1, PS2, and PS3 tend to match. In general, not only in the TDMA system but also in a wireless communication system, it is difficult for the receiving side to determine whether or not a transmission wave of the same frequency is a desired transmission wave. By performing carrier sense on the transmission side, such mutual interference can be avoided.However, in a control channel in which limited frequency allocation is inevitable to expand the accommodation channel and reduce the burden on the standby side, However, there is a high probability of interference even if carrier sense is performed. In particular, in the TDMA system, since it is essential to synchronize from the viewpoint of time constraints, the establishment of mutual interference between wireless relay devices on the control channel becomes extremely high.

As a countermeasure against such a problem, Japanese Patent Laid-Open No.
JP-A-238100 proposes a "wireless relay device" for preventing mutual interference between a plurality of wireless relay devices when transmitting communication control information (own control carrier) to the private terminal when the private terminal waits. I have.

FIG. 10 is a timing chart exemplifying the relay timing of a communication channel by the conventional wireless relay device. That is, FIG. 10A shows the public base station C.
S, FIG. 10 (b) shows a wireless relay device, FIG. 10 (c) shows a self-operated terminal, and each shows a device under communication operation.
The upper side shows a receiving slot, and the lower side shows a transmitting slot. Further, in this specific example, one frame is divided into eight slots, and four slots are respectively allocated to transmission and reception.

First, at timing t1 from the public base station CS.
When a signal is transmitted to the wireless relay device HA using the first slot in the above, the wireless relay device HA selects a communication channel and transmits it to the private terminal PS using the sixth slot at timing t6. And relay the communication. on the other hand,
The signal from the private terminal PS is transmitted using the second slot at timing t2, and the wireless relay device HA similarly transmits the signal to the public base station CS using the fifth slot at timing t5. Relay.

Next, a method for avoiding mutual interference in the conventional wireless relay device will be described with reference to FIGS. FIG. 11 is a timing chart illustrating timing control of intermittent transmission performed during the standby operation. 11 (a) shows the public base station CS, FIG. 11 (b) shows the wireless relay device, and FIG. 11 (c) shows the private terminal, and shows reception on the upper side and transmission on the lower side. THA in the figure is an intermittent transmission cycle.

In the radio relay apparatus of the prior art, a private control carrier is changed to a private terminal PS based on a public control carrier intermittently transmitted from a public base station CS using a control channel.
The transmission timing is set so as to be randomly distributed by a recognition ID or the like unique to the wireless relay device HA. That is, in FIG. 11, when the public control carrier is intermittently transmitted from the public base station CS using the control channel at the timing t1, the radio relay apparatus HA operates at the timing t2 delayed from the timing t1 by the interval T1. Is intermittently transmitted to the private terminal PS. Here, the interval T1 is randomly set with a recognition ID or the like unique to the wireless relay device HA.

FIG. 12 is a timing chart illustrating timing control of intermittent transmission performed when mutual interference occurs with another wireless relay device during a standby operation. That is, FIGS. 12 (a), (b),
(C) is the first, second, and third wireless relay devices, respectively, where reception is shown on the upper side and transmission is shown on the lower side, and THA in the figure is an intermittent transmission cycle.

The mutual interference occurring at the timing t2 in FIG. 12 is caused, for example, when the first wireless relay device is to be added to a mobile communication system having the second and third wireless relay devices. According to the method described with reference to FIG.
The intermittent transmission timing is set, and occurs when the setting timing causes mutual interference with another (second) wireless relay device. In this case, the first wireless relay apparatus performs carrier sensing after the occurrence of the interference, and it is found that the timing is the same as the timing of the second wireless relay apparatus that has already been set. The transmission timing is shifted to timing t6 where there is little mutual interference.

[0012]

However, since the above-mentioned conventional wireless relay device is a stationary type device, it is assumed that the wireless relay device is used by AC power supply, and is synchronized with the public base station CS. , And own terminal P
S must be operated with a high-speed clock in order to secure high-precision synchronization of ± several microseconds, which hinders reduction in power consumption of the device. In recent years, there has been a demand for miniaturization and portability of wireless relay devices, and if a battery-driven device configuration is used to realize this, low power consumption of the device is required. The issue of electrification is the most important issue.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has been made in consideration of the above-mentioned problems, and is a wireless relay for relaying wireless communication between a public base station and a private terminal using a time division multiplex communication (TDMA) system. It is an object of the present invention to provide a wireless relay device, a wireless relay method, and a recording medium that reduce current consumption and reduce power consumption of the device.

[0014]

According to a first aspect of the present invention, there is provided a radio relay apparatus comprising a public base station and a private terminal using a time division multiplex communication (TDMA) system. A wireless relay device for relaying wireless communication, wherein the timing of transmitting a self-controlling carrier to the self-service terminal is controlled in real time by the type of the self-service terminal connected to or registered with the wireless relay device. And a timing control means for generating based on the transmission interval.

According to a second aspect of the present invention, there is provided a wireless relay apparatus for relaying wireless communication between a public base station and a private terminal by using a time division multiplex communication (TDMA) system. It is provided with timing control means for generating a timing for transmitting a carrier to the private terminal based on a transmission interval of a control carrier set by a user via an input means.

According to a third aspect of the present invention, in the wireless relay device according to the first or second aspect, an upper limit is set on the number of types of the private terminal, and the number of types of the private terminal is set to the upper limit. When the upper limit is exceeded, similar types of the types of the self-employed terminals are combined into one type.

According to a fourth aspect of the present invention, in the wireless relay device according to the first, second, or third aspect, the control carrier is transmitted from the self-owned terminal from the timing of transmitting the self-controlled carrier to the self-owned terminal. The interval until the reception timing is the shortest.

According to a fifth aspect of the present invention, in the wireless relay device according to the first, second, third, or fourth aspect, it is possible to transmit the first self-controlled carrier before transmitting the first self-controlled carrier to the self-service terminal. Carrier sense control means for performing carrier sense at all transmission timing, the timing control means, based on the result of the carrier sense,
The self-controlled carrier is transmitted to the self-managed terminal with no interference wave.

According to a sixth aspect of the present invention, in the wireless relay device according to the first, second, third, or fourth aspect, after transmitting the first self-service carrier to the self-service terminal, the wireless relay device periodically transmits the first self-control carrier to the self-service terminal. Carrier sense control that performs mutual interference detection by thinning out the transmission of the self-controlled carrier to the self-managed terminal, and as a result of the detection, when the mutual interference is detected, performs carrier sense at all transmittable transmission timings Means for transmitting the self-controlled carrier to the self-managed terminal at reset timing without interference wave based on the result of the carrier sense.

According to a seventh aspect of the present invention, there is provided a wireless relay apparatus according to the first, second, third or fourth aspect, further comprising a carrier sense control means for performing carrier sense at all transmittable transmission timings. And the timing control means, based on the result of the carrier sense, the interference level is low and at the timing closest to the reception timing of the public control carrier transmitted from the public base station, the self-controlled carrier to the self-operated terminal Is to be transmitted.

[0021] Also, the wireless relay device according to claim 8 is the wireless relay device according to claim 1, 2, 3 or 4, wherein the wireless relay device can transmit before transmitting the first private control carrier to the private terminal. A carrier sense control unit for performing carrier sense at all transmission timings, wherein the timing control unit generates mutual interference for a predetermined interval or more when there is no interference-free timing as a result of the carrier sense. The self-controlled carrier is transmitted to the self-managed terminal at a timing at which the frequency of interference is low.

According to a ninth aspect of the present invention, there is provided a wireless relay apparatus according to the first, second, third, fourth, fifth, sixth, seventh or eighth aspect, wherein a public control carrier is received from the public base station. A high-speed clock from the timing of transmitting the private control carrier to the private terminal to the timing of transmitting the private control carrier to the private terminal, and receiving the next public control carrier transmitted from the public base station from the timing of transmitting the private control carrier to the private terminal. Clock control means for switching the operation clock to the low-speed clock until the timing of the operation.

[0023] The wireless relay device according to claim 10 is
A wireless relay device for relaying wireless communication between a public base station and a private terminal using a time division multiplex communication (TDMA) system, wherein the private control carrier is determined based on the timing of receiving the public control carrier from the public base station. The high-speed clock is used until the transmission to the private terminal, and the low-speed clock is used from the time when the private control carrier is transmitted to the private terminal to the time when the next public control carrier transmitted from the public base station is received. The clock includes clock control means for switching an operation clock.

[0024] The wireless relay device according to claim 11 is
Claims 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10
In the wireless relay device described in (1), there is provided a reception state measurement unit for measuring a reception state of a reception signal, and a transmission power control unit for adjusting transmission power based on a measurement result of the reception state measurement unit.

Further, a wireless relay apparatus according to claim 12 is
What is claimed is: 1. A wireless relay device for relaying wireless communication between a public base station and a private terminal using a time division multiplex communication (TDMA) system, comprising: a reception state measuring unit for measuring a reception state of a reception signal; Transmission power control means for adjusting transmission power based on the measurement result of the measurement means.

A wireless relay device according to claim 13 is
Claims 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10
The wireless relay device according to (1), further comprising transmission power control means for adjusting transmission power based on a set amount set by a user via an input means.

The wireless relay method according to claim 14 is
A wireless relay method for a wireless relay device that relays wireless communication between a public base station and a private terminal using a time division multiplex communication (TDMA) method, wherein a timing for transmitting a private control carrier to the private terminal is And a timing control step of generating based on the transmission interval of the control carrier set in real time according to the type of the private terminal connected or registered to the wireless relay device.

Further, a wireless relay method according to claim 15 is
A wireless relay method for a wireless relay device that relays wireless communication between a public base station and a private terminal using a time division multiplex communication (TDMA) method, wherein a timing for transmitting a private control carrier to the private terminal is The method includes a timing control step of generating based on a control carrier transmission interval set by a user via an input unit.

The wireless relay method according to claim 16 is
The wireless relay method according to claim 14 or 15,
An upper limit is set on the number of types of the self-employed terminals, and when the number of types of the self-employed terminals exceeds the upper limit, similar types among the types of the self-employed terminals are combined into one type.

The wireless relay method according to claim 17 is
17. The wireless relay method according to claim 14, 15 or 16, wherein an interval from a timing of transmitting the private control carrier to the private terminal to a timing of receiving a control carrier from the private terminal is minimized.

The wireless relay method according to claim 18 is
18. The radio relay method according to claim 14, 15, 16 or 17, further comprising a carrier sense control step of performing carrier sense at all transmittable transmission timings before transmitting the first self-controlled carrier to the self-service terminal. In the timing control step, the self-controlled carrier is transmitted to the self-operated terminal at a timing with no interference wave based on a result of the carrier sense control step.

The wireless relay method according to claim 19 is
18. The wireless relay method according to claim 14, 15, 16 or 17, wherein after transmitting the first private control carrier to the private terminal, the transmission of the private control carrier to the private terminal is periodically reduced at predetermined intervals. A carrier sense control step of performing mutual interference detection and performing carrier sense at all transmittable transmission timings when the mutual interference is detected as a result of the detection, wherein the timing control step includes the carrier sense control On the basis of the result of the step, the self-controlled carrier is transmitted to the self-managed terminal at reset timing without interference waves.

[0033] The wireless relay method according to claim 20 is characterized in that:
The wireless relay method according to claim 14, 15, 16, or 17, further comprising a carrier sense control step of performing carrier sense at all transmittable transmission timings,
The timing control step is based on the result of the carrier sense control step, the interference level is low and at the timing closest to the reception timing of the public control carrier transmitted from the public base station, the self-controlled control carrier to the self-operated terminal Is to be transmitted.

[0034] The wireless relay method according to claim 21 is characterized in that:
18. The radio relay method according to claim 14, 15, 16 or 17, further comprising a carrier sense control step of performing carrier sense at all transmittable transmission timings before transmitting the first self-controlled carrier to the self-service terminal. Then, the timing control step, as a result of the carrier sense control step, when there is no interference wave-free timing, the self-controlling carrier at a timing where the frequency of mutual interference occurring is less than a predetermined interval at a low frequency. This is transmitted to the self-employed terminal.

[0035] The wireless relay method according to claim 22 is characterized in that:
The wireless relay method according to claim 14, 15, 16, 17, 18, 19, 20, or 21, from a timing of receiving a public control carrier from the public base station to a timing of transmitting a private control carrier to the private terminal. A high-speed clock, and a low-speed clock from the timing of transmitting the private control carrier to the private terminal to the timing of receiving the next public control carrier transmitted from the public base station. It comprises a control step.

Further, the wireless relay method according to claim 23 is
A wireless relay method for a wireless relay device that relays wireless communication between a public base station and a private terminal by using a time division multiplex communication (TDMA) method, wherein the method includes receiving a public control carrier from the public base station. From the timing of transmitting the self-controlled carrier to the private terminal to the timing of receiving the next public control carrier transmitted from the public base station from the timing of transmitting the self-controlled carrier to the private terminal to the high-speed clock. And a clock control step of switching the operation clock to a low-speed clock.

The wireless relay method according to claim 24 is
Claims 14, 15, 16, 17, 18, 19, 20, 2
The wireless relay method according to 1, 22, or 23, wherein a receiving state measuring step of measuring a receiving state of the received signal;
A transmission power control step of adjusting transmission power based on the measurement result of the reception state measurement step.

The wireless relay method according to claim 25 is
A wireless relay method of a wireless relay device for relaying wireless communication between a public base station and a private terminal using a time division multiplex communication (TDMA) method, comprising: a reception state measuring step of measuring a reception state of a reception signal; And a transmission power control step of adjusting transmission power based on the measurement result of the reception state measurement step.

The wireless relay method according to claim 26 is
Claims 14, 15, 16, 17, 18, 19, 20, 2
The wireless relay method described in 1, 22, 23, 24, or 25, further comprising a transmission power control step of adjusting transmission power based on a set amount set by a user via an input unit.

Further, the computer-readable recording medium according to claim 27 is the computer-readable recording medium according to claims 14, 15, 1
6, 17, 18, 19, 20, 21, 22, 23, 2,
The program is stored as a program for causing a computer to execute the wireless relay method described in 4, 25 or 26.

In the wireless relay device according to the first aspect of the present invention, the wireless relay method according to the fourteenth aspect, and the recording medium according to the twenty-seventh aspect, the wireless communication between the public base station and the private terminal using the TDMA system. The timing of transmitting the private control carrier to the private terminal by the timing control means (timing control step) when relaying is set in real time according to the type of the private terminal connected to or registered in the wireless relay device. It is generated based on the transmission interval of the control carrier. For example, if the transmission interval of the control carrier is set to be generally extended based on the type of the private terminal, the number of transmissions of the control carrier will be reduced, so that the current consumption is reduced and the power consumption of the wireless relay device is reduced. Can be planned. However, the required number of control carriers for carrying incoming information is limited by the number of types of slave units connected to the private terminal.

In the wireless relay device according to the second aspect, the wireless relay method according to the fifteenth aspect, and the recording medium according to the twenty-seventh aspect, wireless communication between the public base station and the private terminal is performed using the TDMA method. When relaying, the timing control means (timing control step) generates a timing for transmitting the private control carrier to the private terminal based on the control carrier transmission interval set by the user via the input means. . For example, if the user sets so as to increase the transmission interval of the control carrier, the number of transmissions of the control carrier is reduced, so that the current consumption can be reduced and the power consumption of the wireless relay apparatus can be reduced.

In the wireless relay device according to claim 3, the wireless relay method according to claim 16, and the recording medium according to claim 27, an upper limit is set for the number of types of the private terminal, and the number of types of the private terminal is limited. Is larger than the upper limit, it is desirable to reduce the number of incoming control carriers by grouping similar types of the private terminal into one type. In other words, when the transmission interval of the control carrier is set by the user, the number of control carriers depending on the type of the private terminal may not be satisfied. It is desirable to reduce the number.

Further, in the wireless relay device according to the fourth aspect, the wireless relay method according to the seventeenth aspect, and the recording medium according to the twenty-seventh aspect, the control carrier is received from the private terminal from the timing of transmitting the private control carrier to the private terminal. It is desirable to minimize the interval until the timing of performing. The designation of the shortest control carrier transmission / reception interval is performed, for example, via broadcast information transmitted from the wireless relay device to the private terminal.

In the wireless relay device according to the fifth aspect, the wireless relay method according to the eighteenth aspect, and the recording medium according to the twenty-seventh aspect, the carrier sense control means may be provided before transmitting the first self-control carrier to the self-service terminal. Carrier sense is performed at all transmittable transmission timings by the (carrier sense control step), and the timing control means (timing control step) performs timing based on the result of the carrier sense (carrier sense control step) at a timing without interference waves. It is desirable to transmit the self-controlled carrier to the self-managed terminal. As described above, the carrier sense is performed before transmitting the first communication control information to the private terminal, and the communication control information is transmitted to the private terminal at a timing without interference waves. Can be avoided.

Further, in the wireless relay device according to claim 6, the wireless relay method according to claim 19, and the recording medium according to claim 27, after transmitting the first private control carrier to the private terminal, the wireless carrier is periodically transmitted at a predetermined interval. Mutual interference is detected by thinning out the transmission of the self-controlled carrier to the self-managed terminal. As a result of the detection, when the mutual interference is detected, the (carrier sense control step) is executed at all the transmittable transmission timings. Carrier sense is performed, and the timing control means (timing control step) desirably causes the self-controlled carrier to be transmitted to the self-managed terminal at a reset timing without interference waves based on the result of the carrier sense (carrier sense control step). . As described above, even after the first communication control information is transmitted to the private terminal, mutual transmission is detected by periodically thinning out the transmission of the communication control information at predetermined intervals, and when mutual interference is detected, carrier sense is performed. Since the communication control information is transmitted to the private terminal at the reset timing without interference wave, the interference can be avoided, and the user does not notice when the interference occurs and the incoming call is not dropped. .

In the wireless relay device according to the seventh aspect, the wireless relay method according to the twentieth aspect, and the recording medium according to the twenty-seventh aspect, all transmittable transmissions can be performed by the carrier sense control means (carrier sense control step). Carrier sense is performed at the timing, and the timing control means (timing control step) determines, based on the result of the carrier sense (carrier sense control step), that the interference level is low and the reception timing of the public control carrier transmitted from the public base station is the highest. It is desirable to transmit the private control carrier to the private terminal at a close timing. As described above, in order to always maintain synchronization with the public base station and ensure high-precision synchronization with the private terminal, the communication control information transmitted from the public base station is transmitted to the private terminal from the reception timing. It is necessary to operate with a relatively high-speed clock until the transmission timing of the communication control information. During this time, the current consumption is large. Therefore, by minimizing this interval, the power consumption of the device should be reduced. Can be.

In the wireless relay device according to claim 8, the wireless relay method according to claim 21, and the recording medium according to claim 27, carrier sense control is performed before transmitting the first self-controlled carrier to the self-service terminal. Means (carrier sense control step) performs carrier sense at all transmittable transmission timings. In the timing control means (timing control step), as a result of the carrier sense (carrier sense control step), there is a timing with no interference wave. When not, it is desirable to transmit the private control carrier to the private terminal at a timing at which the frequency of mutual interference occurring within a predetermined interval is low. As a result, even in an environment where there are a large number of public base stations and other wireless relay devices, there is no problem that the transmission timing is completely used by other wireless relay devices and transmission cannot be performed.

Further, in the wireless relay device according to claim 9, the wireless relay method according to claim 22, and the recording medium according to claim 27, the clock control means (clock control step).
Thus, a period from when the public control carrier is received from the public base station to when the private control carrier is transmitted to the private terminal is set as a high-speed clock, and transmitted from the public base station from the timing when the private control carrier is transmitted to the private terminal. The operation clock is switched to the low-speed clock until the timing when the next public control carrier is received.

In the wireless relay device according to the tenth aspect, the wireless relay method according to the twenty-third aspect, and the recording medium according to the twenty-seventh aspect, wireless communication between a public base station and a private terminal is performed using a TDMA system. At the time of relaying, the clock control means (clock control step) uses the high-speed clock from the timing of receiving the public control carrier from the public base station to the timing of transmitting the private control carrier to the private terminal, and operates the private control carrier independently. The operation clock is switched to the low-speed clock from the timing of transmission to the terminal to the timing of receiving the next public control carrier transmitted from the public base station. in this way,
Only the period from the reception timing of the public control carrier to the transmission timing of the private control carrier is operated with a relatively high-speed clock, and the other periods are operated with a low-speed clock, so that synchronization with the public base station is always maintained. It is possible to reduce the power consumption of the device while ensuring highly accurate synchronization with the self-managed terminal. More strictly, it is desirable that the high-speed clock operation be performed within a section in which transmission and reception of the private control carrier is performed after synchronization is performed by receiving the public control carrier.

In the wireless relay device according to the eleventh aspect, the wireless relay method according to the twenty-fourth aspect, and the recording medium according to the twenty-seventh aspect, the reception state of the reception signal is measured by the reception state measurement means (reception state measurement step). Preferably, the transmission power control means (transmission power control step) adjusts the transmission power based on the measurement result of the reception state measurement means (reception state measurement step). Here, the measurement of the reception state is as follows.
For example, the measurement is performed by measuring a reception signal level by a reception electric field strength measurement unit (RSSI) or the like.

In the wireless relay device according to the twelfth aspect, the wireless relay method according to the twenty-fifth aspect, and the recording medium according to the twenty-seventh aspect, wireless communication between a public base station and a private terminal is performed using a TDMA system. At the time of relaying, the reception state of the received signal is measured by the reception state measurement unit (reception state measurement step), and the transmission power control unit (transmission power control step) measures the measurement result of the reception state measurement unit (reception state measurement step). The transmission power is adjusted based on the transmission power. As a result, the transmission power can be adjusted to the optimal (minimum) transmission power in accordance with the communication distance, so that the power consumption of the wireless relay device can be reduced.

In the wireless relay device according to the thirteenth aspect, the wireless relay method according to the twenty-sixth aspect, and the recording medium according to the twenty-seventh aspect, the transmission power control means (transmission power control step) allows the user to input via the input means. It is desirable to adjust the transmission power based on the set amount set in advance. Thereby, for example, a user who uses the self-employed area at a short distance,
Since the transmission power can be adjusted to the optimum (minimum) transmission power in accordance with the communication distance, the power consumption of the wireless relay device can be reduced.

[0054]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a wireless relay apparatus, a wireless relay method, and a recording medium according to the present invention will be described with reference to [first embodiment], [second embodiment], and [third embodiment]. ], [Fourth Embodiment], [Fifth Embodiment], [Sixth Embodiment], and [Seventh Embodiment] will be described in detail with reference to the drawings. In the description of each embodiment, the wireless relay device and the wireless relay method according to the present invention will be described in detail.
The description is included in the following description of the wireless relay method because the storage medium stores a program for executing the wireless relay method.

[First Embodiment] FIG. 1 is a block diagram of a radio relay apparatus according to a first embodiment of the present invention. The wireless relay device HA of the present embodiment performs time division multiplex communication (TDMA).
This relays the wireless communication between the public base station CS and the private terminal PS using the system. In FIG. 1, the antenna 101, the wireless unit 103, the wireless control unit 105, the TDMA processing unit 107, the control unit 109, The input unit 111 is provided.

Here, the antenna 101 is a transmitting / receiving antenna, and the radio section 103 mainly transmits and receives radio signals, and includes a reception field strength measurement section (RSSI) 115 as a means for detecting a reception state. ing.
The wireless control unit 105 mainly performs modulation and demodulation, and the TDMA processing unit 107 mainly performs various TDMA processes such as encoding and decoding.
Further, the input unit 111 is a user interface for taking instruction settings from the user into the control unit 109.

The processing section 109 further includes a transmission power control section 121, a carrier sense control section 123, a transmission / reception timing control section 125, an information storage section 127, and a clock control section 129. Carrier sense control section 123
Sets and controls at what timing carrier sense is performed for each channel (frequency) used. In particular, the transmission / reception timing control unit 125 receives the public control carrier intermittently transmitted from the public base station CS at any timing, and transmits the private control carrier at the private terminal P
The setting is controlled to be transmitted to S. The information storage unit 127
Stores device information unique to the wireless relay device HA and the type of the private terminal PS connected to the wireless relay device HA. Here, the unique device information is an identification ID, a call code, or the like. Further, the clock control unit 129 controls to switch the operation clock between a low-speed clock and a high-speed clock.

Next, the operation of the wireless relay device HA of the present embodiment will be described with reference to FIG. FIG. 2 is a timing chart illustrating timing control of intermittent transmission and reception of a control carrier performed during a standby operation in the wireless relay device HA of the present embodiment. 2A is a public base station CS, FIG. 2B is a wireless relay device HA, FIG.
(C) is a private terminal PS, and shows reception on the upper side and transmission on the lower side.

In the wireless relay device HA and the wireless relay method of the present embodiment, the type of the private terminal PS connected to the wireless relay device HA is registered in the information storage unit 127 in advance, and the transmission / reception timing control unit is registered. At 125 (timing control step), the transmission interval of the private control carrier to be transmitted to the private terminal PS is set in real time while referring to the private terminal type information in the information storage unit 127, and the private control carrier is transmitted to the private terminal PS. Is generated based on the transmission interval.

That is, in FIG. 2, when a public control carrier from the public base station CS is received at timing t1,
The transmission timing t2 is set by the transmission / reception timing control unit 125 with reference to the device information (identification ID, call code, etc.) in the information storage unit 127. That is, at the first transmission timing t2 which is delayed from the timing t1 by the interval T1 based on the identification ID or the like, the wireless unit 103 transmits the private control carrier to the private terminal PS. Then, at timing t3, the wireless relay device HA receives a private control carrier from the private terminal PS.

At this time, the transmission / reception timing control unit 12
Reference numeral 5 refers to the private terminal type information in the information storage unit 127 and sets the transmission interval THA of the private control carrier to be transmitted to the private terminal PS in real time. Then, upon receiving the public control carrier at timing t5, the wireless relay device H
A transmits the next private control carrier to the private terminal PS at a transmission timing t6 that is delayed from the transmission timing t2 by the transmission interval THA.

In the example described above, the private terminal PS
Was set with reference to the private terminal type information registered (stored) in the information storage unit 127, but the user sets the transmission interval THA of the private control carrier to be transmitted to the user via the input unit 111. Is also good.

As described above, if the transmission interval THA of the private control carrier is set to be extended based on the type of the private terminal PS or the user setting, for example, the number of transmissions of the private control carrier is reduced, so that the consumption is increased. The current can be reduced to reduce the power consumption of the device.

However, the required number of independent control carriers for carrying incoming information is limited by the number of types of slave units connected to the own terminal PS. FIG. 3 exemplifies the configuration of the self-controlled carrier. As shown in FIG.
When 2,..., Pn are used as the incoming information, incoming carriers for the number of types of the slave units are required.

In addition, the transmission interval THA of the self-controlled carrier
When the user is set, there may be cases where the number of self-operated control carriers according to the type of the self-operated terminal PS cannot be satisfied. In this case, it is necessary to reduce the number of incoming control carriers by grouping the types of slave units for each similar type. desirable.

As shown in FIG. 2, the interval TTR from the timing (t6) of transmitting the private control carrier to the private terminal PS to the timing (t7) of receiving the private control carrier from the private terminal PS is fixed to the shortest. It is desirable. The specification for setting the control carrier transmission / reception interval TTR to be the shortest is performed, for example, from the wireless relay device HA to the private terminal PS.
This is performed by designating the shortest timing in the notification information transmitted to.

[Second Embodiment] Next, a radio relay apparatus according to a second embodiment is similar to the radio relay apparatus according to the first embodiment shown in FIG.
Is provided. FIG. 4 is a timing chart illustrating timing control of intermittent transmission / reception of a control carrier performed when mutual interference occurs with another wireless relay device during a standby operation of the wireless relay device HA of the present embodiment. It is. That is, FIGS. 4 (a), (b),
(C) is the first, second, and third wireless relay devices, respectively, and shows reception on the upper side and transmission on the lower side.

In the wireless relay device HA and the wireless relay method according to the present embodiment, for example, the first wireless relay device according to the present embodiment is to be added to a mobile communication system including the second and third wireless relay devices. In this case, before transmitting the first self-controlled carrier to the self-operated terminal PS, the carrier sense control unit 123 (carrier sense control step)
Carrier pre-transmission sensing is performed at all transmittable transmission timings. The transmission / reception timing control unit 125 (timing control step) transmits a self-controlled carrier to the self-operated terminal PS at the timing t6 when mutual interference with the second and third wireless relay devices does not occur based on the result of the carrier sense before transmission. Start sending.

As described above, before transmitting the first communication control information to the private terminal PS, the pre-transmission carrier sense is performed,
Since the private control carrier is transmitted to the private terminal PS at a timing without interference waves, interference can be avoided from the first transmission of the private control carrier.

[Third Embodiment] Next, a wireless relay apparatus according to a third embodiment has the configuration shown in FIG. 1 as in the first embodiment. FIG. 5 is a timing chart for explaining the timing control of intermittent transmission and reception of the control carrier performed during the standby operation in the wireless relay apparatus HA of the present embodiment, where reception is shown on the upper side and transmission is shown on the lower side.

In the radio relay device HA and the radio relay method according to the present embodiment, the transmission of the private control carrier to the private terminal PS is started and then periodically (t11, t2) at predetermined intervals.
At 1, t31, t41), the transmission of the private control carrier to the private terminal PS is thinned out, and the presence or absence of an interference wave is measured by the reception electric field strength measuring unit 115 or the like. For example, when an interference wave (mutual interference) is detected as a result of the interference detection at the timing t21, the carrier sense control unit 123 (carrier sense control step) performs the timing t21.
From t to t31, carrier sense is performed at all transmittable transmission timings. Next, the transmission / reception timing control unit 1
In 25 (timing control step), transmission of the self-controlled carrier to the self-operated terminal PS is restarted at the reset timing without interference wave based on the result of the carrier sense.

As described above, in the present embodiment, even after transmitting the first privately-owned control carrier to the privately-owned terminal PS, the transmission of the privately-owned control carrier is periodically thinned out at predetermined intervals to detect mutual interference, and the mutual interference is detected. Is detected, carrier sense is performed, and the self-controlled carrier is transmitted to the self-operated terminal PS at the reset timing without interference waves, so that the interference can be avoided and the user may notice when the interference is occurring. There is no loss of incoming calls due to the absence.

[Fourth Embodiment] Next, in the radio relay apparatus HA and the radio relay method according to the fourth embodiment, the carrier sense control section 123 (carrier sense control step) controls all transmittable transmission timings. Performs carrier sense. Next, the transmission / reception timing control unit 125
In the (timing control step), based on the result of the carrier sense, the self-controlled carrier is transmitted to the self-terminal PS at a timing that has a low interference level and is closest to the reception timing of the self-controlled carrier transmitted from the public base station.

The radio relay device HA always keeps synchronization with the public base station CS, and ± several [μsec] to the private terminal PS.
In order to ensure high-precision synchronization, the operation is performed using a higher-speed clock from the reception timing of the public control carrier transmitted from the public base station CS to the transmission timing of the private control carrier to the private terminal PS. Need
Further, since the current consumption is large, the shorter this interval is, the lower the power consumption of the device can be. Note that the carrier sense of the present embodiment is the carrier sense before the start of transmission of the private control carrier as in the second embodiment, or the carrier sense after the start of transmission of the private control carrier as in the third embodiment. It can be applied to any of the senses.

[Fifth Embodiment] Next, in the radio relay apparatus HA and the radio relay method according to the fifth embodiment, the carrier sense control unit 123 (carrier sense control step) controls the self-management of the self-managed terminal PS. Before starting carrier transmission, carrier sensing is performed at all transmittable transmission timings. Next, the transmission / reception timing control unit 125
In the (timing control step), as a result of carrier sensing, when there is no timing with no interference wave, the self-control carrier is transmitted to the self-terminal PS at a timing at which the frequency of occurrence of mutual interference is low over a predetermined interval. Let it.

As described above, in the present embodiment, when there is no timing with no interference wave as a result of the carrier sensing, a timing with a low frequency of occurrence of mutual interference within a predetermined interval is selected. Since the private control carrier is transmitted to the private terminal PS, even in an environment where a large number of public base stations CS and other wireless relay devices are present, the transmission timing is completely used by other wireless relay devices and the like. Thus, the problem that transmission cannot be performed does not occur.

[Sixth Embodiment] The wireless relay apparatus according to the sixth embodiment has the configuration shown in FIG. 1 as in the first embodiment. FIG. 6 is a timing chart illustrating timing control of intermittent transmission and reception of a control carrier performed during a standby operation in the wireless relay device HA of the present embodiment. That is, FIG. 6A shows the public base station C.
S, FIG. 6B shows the operation clock of the wireless relay device HA, FIG. 6C shows the operation clock of the wireless relay device HA, and FIGS.
In (b), reception is shown on the upper side and transmission is shown on the lower side.

In the radio relay apparatus HA and the radio relay method according to the present embodiment, the clock control unit 129 (clock control step) transfers the private control carrier to the private terminal PS from the timing t1 when the public control carrier is received from the public base station CS. The high-speed clock is used until the transmission timing t2, and the low-speed clock is used from the timing t2 when the private control carrier is transmitted to the private terminal PS to the timing t3 when the next public control carrier transmitted from the public base station CS is received. , Switch the operation clock. More strictly, the high-speed clock operation is desirably performed until a period in which the synchronization is performed in the public control carrier reception (t1) and then the private control carrier transmission / reception (t2) is performed.

As described above, in the present embodiment, only the period from the reception timing of the public control carrier to the transmission timing of the private control carrier is operated by the relatively high-speed clock, and the other period is operated by the low-speed clock. , Always keep synchronization with the public base station CS,
S while ensuring high-precision synchronization with S
A can achieve low power consumption.

[Seventh Embodiment] A radio relay apparatus according to a seventh embodiment has the configuration shown in FIG. 1 as in the first embodiment. FIG. 7 is a configuration diagram illustrating the concept of a communication system to which the wireless relay device HA of the present embodiment is applied. FIG. 8 is a timing chart illustrating timing control of intermittent transmission / reception of a control carrier performed during a standby operation in the wireless relay device HA of the present embodiment. 8A is a public base station CS, FIG. 8B is a wireless relay device HA, and FIG.
S, FIG. 8 (d) shows the reception electric field strength of the wireless relay device HA, FIG. 8 (e) shows the transmission power of the wireless relay device HA, and in FIGS. 8 (a), (b) and (c), Shows reception, and the bottom shows transmission.

In the radio relay apparatus HA and the radio relay method according to the present embodiment, the electric field intensity of the received signal is measured by the received electric field intensity measuring section 115 (receiving state measuring step), and the transmission power control section 121 (transmitting power control step). In, the transmission power is adjusted based on the measurement result of the reception electric field strength measurement section 115.

That is, in FIG. 7, the public area AR1
In the area where the private area AR2 overlaps with the area shown in FIG.
As shown at timings t2 and t6, the public base station CS
The received electric field intensity of the public control carrier from the private terminal PS is small, and as shown at timings t4 and t8, the received electric field intensity of the private control carrier from the private terminal PS is large. In such a case, as shown at timing t6 in FIG. 8 (d), the transmission power of the wireless relay apparatus HA is relatively increased at the transmission / reception timing of the public control carrier with the public base station CS. Further, as shown at timing t8, at the transmission / reception timing of the private control carrier with the private terminal PS, the transmission power of the wireless relay device HA is controlled to be relatively small.

As a result, the transmission power can be adjusted to the optimum (minimum) transmission power in accordance with the communication distance with the public base station CS or the private terminal PS, so that the power consumption of the radio relay device HA can be reduced. Can be. Also, the transmission power control unit 1
The adjustment of the transmission power in 21 (transmission power control step) may be performed based on the set amount set by the user via the input unit 111. Thus, for example, a user who uses the self-owned area at a short distance can adjust the transmission power to the optimal (minimum) corresponding to the communication distance, thereby reducing the power consumption of the wireless relay device HA. Can be.

[0084]

As described above, according to the radio relay apparatus, the radio relay method, and the recording medium of the present invention, the timing of transmitting the self-control carrier to the self-terminal by the timing control means (timing control step) The transmission interval of the control carrier set in real time according to the type of the private terminal connected or registered to the wireless relay device or the transmission interval of the control carrier set by the user via the input means is generated. For example, by setting the transmission interval of the control carrier to be widened, it is possible to reduce the number of transmissions of the control carrier, reduce the current consumption, and reduce the power consumption of the wireless relay apparatus.

Also, according to the present invention, only the period from the reception timing of the public control carrier to the transmission timing of the private control carrier is operated by the relatively high-speed clock, and the other period is operated by the low-speed clock. It is possible to always maintain synchronization with the public base station and to reduce the power consumption of the wireless relay device while ensuring high-precision synchronization with the private terminal.

According to the present invention, the reception state of the reception signal is measured by the reception state measurement means (reception state measurement step), and the transmission power control means (transmission power control step) is used by the reception state measurement means (reception state measurement step). Since the transmission power is adjusted based on the measurement result of the measurement step) or the set amount set by the user via the input means, the transmission power can be adjusted to an optimal (minimum) transmission power corresponding to the communication distance. Thus, the power consumption of the wireless relay device can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a wireless relay device according to a first embodiment of the present invention.

FIG. 2 is a timing chart illustrating timing control of intermittent transmission / reception of a control carrier performed during a standby operation in the wireless relay device of the first embodiment.

FIG. 3 is an explanatory diagram illustrating the configuration of a self-controlled carrier.

FIG. 4 is a timing chart illustrating intermittent transmission / reception timing control of a control carrier performed when mutual interference occurs with another wireless relay device during a standby operation of the wireless relay device according to the second embodiment; It is.

FIG. 5 is a timing chart illustrating timing control of intermittent transmission and reception of a control carrier performed during a standby operation in the wireless relay device according to the third embodiment.

FIG. 6 is a timing chart illustrating timing control of intermittent transmission / reception of a control carrier performed during a standby operation in a wireless relay device according to a fourth embodiment.

FIG. 7 is a configuration diagram illustrating a concept of a communication system to which a wireless relay device according to a seventh embodiment is applied.

FIG. 8 is a timing chart illustrating timing control of intermittent transmission / reception of a control carrier performed during a standby operation in a wireless relay device according to a seventh embodiment.

FIG. 9 is a configuration diagram illustrating the concept of a mobile communication system using a wireless relay device.

FIG. 10 is a timing chart illustrating the relay timing of a communication channel by a conventional wireless relay device.

FIG. 11 is a timing chart illustrating timing control of intermittent transmission performed during a conventional standby operation.

FIG. 12 is a timing chart illustrating timing control of intermittent transmission performed when mutual interference occurs with another wireless relay device during a standby operation.

[Explanation of symbols]

 CS public base station HA wireless relay device PS private terminal 101 antenna 103 wireless unit 105 wireless control unit 107 TDMA processing unit 109 control unit 111 input unit 115 reception electric field strength measurement unit (reception state measurement unit) 121 transmission power control unit 123 carrier sense Control unit 125 Transmission / reception timing control unit 127 Information storage unit 129 Clock control unit

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) EE22 EE23 FF26 GG14 GG25

Claims (27)

[Claims] 1. A wireless relay apparatus for relaying wireless communication between a public base station and a private terminal using a time division multiplex communication (TDMA) system, wherein a timing for transmitting a private control carrier to the private terminal is determined. And a timing control means for generating a control carrier based on a transmission interval of a control carrier set in real time according to a type of a self-service terminal connected to or registered in the wireless relay device. 2. A wireless relay apparatus for relaying wireless communication between a public base station and a private terminal using a time division multiplex communication (TDMA) method, wherein a timing for transmitting a private control carrier to the private terminal is determined. And a timing control means for generating the control carrier based on a control carrier transmission interval set by a user via an input means. 3. An upper limit is set on the number of types of the private terminal, and when the number of types of the private terminal exceeds the upper limit, similar types among the types of the private terminal are combined into one type. The wireless relay device according to claim 1 or 2, wherein: 4. The system according to claim 1, wherein an interval from a timing of transmitting the self-controlled carrier to the self-operated terminal to a timing of receiving a control carrier from the self-operated terminal is the shortest. Wireless relay device. 5. A carrier sense control unit for performing carrier sense at all transmittable transmission timings before transmitting the first self-managed control carrier to the self-managed terminal, wherein the timing control unit detects the carrier sense. 5. The wireless relay device according to claim 1, wherein the self-service carrier is transmitted to the self-service terminal at a timing without interference waves based on a result. 6. After transmitting the first self-managed control carrier to the self-managed terminal, the transmission of the self-managed control carrier to the self-managed terminal is periodically thinned out at predetermined intervals to detect mutual interference, and as a result of the detection, When detecting mutual interference, it has a carrier sense control means for performing carrier sense at all transmittable transmission timings, the timing control means, based on the result of the carrier sense, at a reset timing without interference waves 5. The wireless relay device according to claim 1, wherein the self-controlled carrier is transmitted to the self-managed terminal. 7. A carrier sense control unit for performing carrier sense at all transmittable transmission timings, wherein the timing control unit has a low interference level and transmits from the public base station based on a result of the carrier sense. 5. The wireless relay device according to claim 1, wherein the private control carrier is transmitted to the private terminal at a timing closest to the reception timing of the public control carrier. 8. A carrier sense control unit for performing carrier sense at all transmittable transmission timings before transmitting the first self-controlled carrier to the self-managed terminal, wherein the timing control unit detects the carrier sense. As a result, when there is no timing with no interference wave, the self-controlled carrier is transmitted to the self-operated terminal at a timing at which the frequency of occurrence of mutual interference is low during a predetermined interval or more. 5. The wireless relay device according to 2, 3, or 4. 9. A high-speed clock between a timing at which a public control carrier is received from the public base station and a timing at which a private control carrier is transmitted to the private terminal, and a timing at which the private control carrier is transmitted to the private terminal. A low-speed clock until the timing of receiving the next public control carrier transmitted from the public base station,
9. The wireless relay device according to claim 1, further comprising clock control means for switching an operation clock. 10. A wireless relay device for relaying wireless communication between a public base station and a private terminal using a time division multiplex communication (TDMA) system, wherein timing for receiving a public control carrier from the public base station is provided. From the timing of transmitting the private control carrier to the private terminal to the timing of transmitting the private control carrier to the private terminal to the timing of receiving the next public control carrier transmitted from the public base station from the timing of transmitting the private control carrier to the private terminal A wireless relay device comprising clock control means for switching an operation clock to a low-speed clock until the time is reached. 11. A reception state measuring unit for measuring a reception state of a reception signal, and a transmission power control unit for adjusting transmission power based on a measurement result of the reception state measurement unit. 2, 3, 4, 5, 6, 7, 8, 9, or 10
A wireless relay device according to claim 1. 12. A wireless relay device for relaying wireless communication between a public base station and a private terminal using a time division multiplex communication (TDMA) method, wherein a reception state measuring means for measuring a reception state of a reception signal. And a transmission power control unit that adjusts transmission power based on the measurement result of the reception state measurement unit. 13. The apparatus according to claim 1, further comprising transmission power control means for adjusting transmission power based on a set amount set by a user via an input means.
The wireless relay device according to 7, 8, 9 or 10. 14. A wireless relay method for a wireless relay device for relaying wireless communication between a public base station and a private terminal using a time division multiplex communication (TDMA) method, wherein a private control carrier is transmitted to the private terminal. A wireless relay method including a timing control step of generating a transmission timing based on a transmission interval of a control carrier set in real time according to a type of a private terminal connected or registered to the wireless relay device. 15. A wireless relay method of a wireless relay device for relaying wireless communication between a public base station and a private terminal using a time division multiplex communication (TDMA) method, wherein a private control carrier is transmitted to the private terminal. A wireless relay method including a timing control step of generating a transmission timing based on a transmission interval of a control carrier set by a user via an input unit. 16. An upper limit is set on the number of types of the private terminal, and when the number of types of the private terminal exceeds the upper limit,
The similar type among the types of the self-employed terminals is grouped into one type.
2. The wireless relay method according to 1. 17. The method according to claim 14, wherein an interval from a timing at which the private control carrier is transmitted to the private terminal to a timing at which a control carrier is received from the private terminal is the shortest. Wireless relay method. 18. A carrier sense control step of performing carrier sense at all transmittable transmission timings before transmitting a first self-managed control carrier to the self-managed terminal, wherein the timing control step includes the carrier sense control. 18. The wireless relay method according to claim 14, wherein the self-controlled carrier is transmitted to the self-managed terminal at a timing without interference waves based on a result of the step. 19. After transmitting the first self-managed control carrier to the self-managed terminal, the transmission of the self-managed control carrier to the self-managed terminal is periodically thinned out at predetermined intervals to detect mutual interference. As a result of the detection, A carrier sense control step of performing carrier sense at all transmittable transmission timings when mutual interference is detected, wherein the timing control step is based on a result of the carrier sense control step and resets without interference waves. The self-service carrier is transmitted to the self-service terminal at a timing.
8. The wireless relay method according to 7. 20. A carrier sense control step of performing carrier sense at all transmittable transmission timings, wherein the timing control step has a low interference level and the public base station based on a result of the carrier sense control step. 18. The wireless relay method according to claim 14, wherein the private control carrier is transmitted to the private terminal at a timing closest to a reception timing of a public control carrier transmitted from the terminal. 21. A carrier sense control step of performing carrier sense at all transmittable transmission timings before transmitting the first self-managed control carrier to the self-managed terminal, wherein the timing control step includes the carrier sense control. As a result of the step, when there is no timing with no interference wave, the self-control carrier is transmitted to the self-terminal at a timing where the frequency of mutual interference occurring during a predetermined interval or longer is low. Item 14, 1
The wireless relay method according to 5, 16, or 17. 22. A high-speed clock from the timing of receiving a public control carrier from the public base station to the timing of transmitting a private control carrier to the private terminal,
A clock control step of switching an operation clock to a low-speed clock in a period from a timing of transmitting the private control carrier to the private terminal to a timing of receiving a next public control carrier transmitted from the public base station. Claims 14, 15, 16, 1
The wireless relay method according to 7, 18, 19, 20 or 21. 23. A wireless relay method for a wireless relay device for relaying wireless communication between a public base station and a private terminal by using a time division multiplex communication (TDMA) method, comprising: The next public control carrier transmitted from the public base station from the timing of transmitting the private control carrier to the private terminal to the high-speed clock from the timing of receiving the private control carrier to the timing of transmitting the private control carrier to the private terminal. And a clock control step of switching an operation clock to a low-speed clock until the timing of receiving the wireless relay. 24. A reception state measuring step of measuring a reception state of a reception signal, and a transmission power control step of adjusting transmission power based on a result of the measurement of the reception state measurement step. , 15, 16, 17, 18, 19,
24. The wireless relay method according to 20, 21, 22 or 23. 25. A wireless relay method of a wireless relay device for relaying wireless communication between a public base station and a private terminal using a time division multiplex communication (TDMA) method, wherein a reception state of a received signal is measured. A wireless relay method comprising: a reception state measuring step; and a transmission power control step of adjusting transmission power based on a measurement result of the reception state measurement step. 26. A transmission power control step of adjusting transmission power based on a set amount set by a user via an input means.
The wireless relay method according to 7, 18, 19, 20, 21, 22, or 23. 27. The method of claim 14, 15, 16, 17, 1.
A computer-readable recording medium storing a program for causing a computer to execute the wireless relay method described in 8, 19, 20, 21, 22, 23, 24, 25, or 26.