JPS61281629A - Radio communication equipment - Google Patents

Abstract

PURPOSE:To eliminate waste power from being supplied to a radio equipment of a repeater station and a terminal station by applying battery saving according to the signal of a battery saving timing generation circuit provided to each of the relay station and the terminal station when the channel identification synchronizing signal sent from the base station is not detected for a prescribed time or over. CONSTITUTION:A battery saving timing generating section shown in one dashed chain lines in figure is provided to a terminal station and a repeater station. If a host station is faulty and a channel identification synchronizing signal from a base station 51 is not received for a specified time or over while power is given to the radio equipment, the repeater stations 52, 53 and the terminal station 54 use the own battery saving timing signal to apply battery saving. Since the period of the battery saving differs from the period of the battery saving synchronizing signal sent from the base station 51, even when the host station is restored, because the channel identification synchronizing signal is received from the base station 51 without fail, the battery saving is applied when the battery saving synchronizing signal is received.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a time division multiple access (TDMA) wireless communication device. In particular, it relates to pantry saving, which reduces power consumption during standby by intermittently supplying power to the radios of relay stations and terminal stations.

〔overview〕

The present invention provides a time division multiple access wireless communication device in which one or more terminal stations are connected to a base station via one or more relay stations, in which a synchronization signal for channel identification sent from the base station is used. When the relay station and terminal station cannot be detected for a specified period of time, battery saving operation is performed according to the signal from the battery saving timing generation circuit installed in each relay station and terminal station. This prevents unnecessary power from being continuously supplied to the station's radio equipment.

[Conventional technology]

FIG. 5 is a block diagram of a conventional wireless communication device. As shown in FIG. 5, one base station 51, relay stations 52 and 53 that relay the signal of this base station 51, and this relay station 5
2. Terminal station 54 that communicates with base station 51 via 53
A time division multiple access wireless communication system consisting of
The method of intermittently supplying power to the transceivers of relay stations 52, 53 and terminal stations 54 is called battery saving. Furthermore, if this device is of a time division type, each channel uses the same frequency, and each channel is distinguished by the time position (time slot) of the signal.

Therefore, in order to connect the line correctly, all of the relay stations 52 and 53 and the terminal station 54 in FIG. There is a need. Therefore, in the case of the time division system, battery saving is synchronized so that all relay stations 52, 53 and terminal stations 54 synchronize and turn off their radios, and the base station
The channel identification synchronization signal from No. 1 is reliably transmitted to the terminal station 54. That is, the base station 51 sends out a battery saving synchronization signal for battery saving at regular intervals. When the relay stations 52 and 53 and the terminal station 54 detect the battery saving synchronization signal, they start battery saving. This battery saving is for relay station 5
2. While the wireless devices of 53 and the terminal station 54 are powered and operating, the power supply is adjusted so that the battery saving synchronization signal sent from the base station 51 at regular intervals can be received without fail. Intermittent operation is performed at fixed time intervals. In this way, power is supplied to the wireless device intermittently to reduce power consumption. When the battery saving synchronization signal is no longer detected, battery saving stops until the battery saving synchronization signal is detected.

[Problem that the invention seeks to solve]

However, in such conventional wireless communication devices, the relay station and the terminal station stop battery saving until a battery saving synchronization signal is detected. For example, in FIG. 5, relay station 52 and relay station 53
When the line between the relay station 52 and
If the radio transmitting the signal in the lower direction fails and the battery saving synchronization signal is not sent to the relay station 53 for a long time, the relay station 53 and the terminal station 54 will not receive the battery saving synchronization signal until the battery saving synchronization signal is received. This means that power will continue to be supplied to the radio for a long period of time. In addition, such devices are required for remote telephone calls or wireless communications during disasters and emergencies, and are used at relay stations 52, 53 and terminal stations 5.
4, the power source must rely on batteries or solar cells. Therefore, as mentioned above, the relay station 52
．． 53 and the terminal station 54,
This had the disadvantage of wasting power.

The present invention solves the above-mentioned drawbacks, and even if the upper station of the terminal station or relay station fails, or the radio of the relay station or the radio of the terminal station fails, the radio of the relay station and the terminal station will not be affected. An object of the present invention is to provide a wireless communication device that does not continue to supply wasteful power.

[Means for solving problems]

The present invention provides a base station, one or more relay stations that relay radio signals transmitted and received by the base station, and one or more relay stations that transmit and receive radio signals between the base station and the base station via the relay station. a terminal station, and each of the relay stations and the terminal station includes means for generating a battery saving signal based on a transmission signal from the base station, and means for switching on and off the power supply current based on the battery saving signal. In the division multiple access wireless communication device, each of the relay stations and terminal stations includes a battery saving timing generating means for generating the battery saving signal when a channel identification synchronization signal is not continuously detected in the received signal for a predetermined period of time or more. Features [Function] The present invention is characterized in that, in a time division multiple access wireless communication system, when a channel signal synchronization signal is not detected for more than a specified time at each relay station and terminal station, battery saving is performed. The timing generating means generates a battery saving signal, and this signal opens and closes the power supply current to perform a puffy saving operation. Even if the radio of a terminal station breaks down, it is possible to prevent wasteful power from continuing to be supplied to the radio of the relay station and the terminal station.

〔Example〕

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

FIG. 1 is a block diagram of a terminal station of a wireless communication device according to an embodiment of the present invention. In FIG. 1, a radio signal from a relay station 53 (not shown) is connected to the input of a radio device 2 via an antenna 1 and demodulated. The output signal of the radio device 2 is connected to an input of a synchronization signal detection circuit 3 and an input of a battery saving synchronization signal detection circuit 4. The battery saving synchronization signal from the battery saving synchronization signal detection circuit 4 is connected to the input of the timer circuit 5 and the reset input of the flip-flop 6, and the flip-flop 6 is reset. When a predetermined time has elapsed from the timer circuit 5, the output signal is connected to the cent input of the flip-flop 6, and the flip-flop 6 is set. The Q output of the flip-flop 6 is connected to one input of an AND circuit 7. The channel identification synchronization signal detected from the synchronization signal detection circuit 3 is sent to the timer circuit 80.
Connected to input. When the synchronization signal for channel identification is connected continuously, the output of the timer circuit 8 is connected to the OR circuit 1.
Connected to one input of 0.

Here, the feature of the present invention is the battery saving timing generation portion surrounded by a dashed line. If the synchronization signal for channel identification cannot be detected for more than the specified time,
A battery saving timing signal from the battery saving timing generating circuit 9 is connected to the other input of the OR circuit 10.

The output of the OR circuit 10 is connected to the other input of the AND circuit 7. The output of the AND circuit 7 is connected to the control input of the switch 11. The output of the power supply 12 is connected to the power input of the radio 2 via the switch 11.

FIG. 2 is a block configuration diagram of a relay station of the wireless communication device of the present invention. In Figure 2, 21.25 is the antenna, 2
2 is a receiver, 23 is a reproducing circuit, 24 is a transmitter, 26 is a synchronization signal detection circuit, and 27 is a battery saving synchronization signal detection circuit. Transmitter 24 is connected to power supply 35 via switch 37, and receiver 22 is connected to power supply 35 via switch 36. The channel identification synchronization signal from the synchronization signal detection circuit 26 is connected to the input of the timer circuit 31, and when the channel identification synchronization signal is detected continuously, the output of the timer circuit 31 is connected to one input of the OR circuit 33 and the switch 37. connected to the control input of the

Here, the feature No. 1 of the present invention is the battery saving timing generation portion surrounded by a dashed line. In other words, when the channel identification synchronization signal cannot be detected for more than a specified time, the battery saving timing generation circuit 32
The panteri saving timing signal from OR circuit 33
is connected to the other input of The output of the OR circuit 33 is connected to one input of the AND circuit 34. The output of the battery saving synchronization signal detection circuit 27 is connected to the input of the timer circuit 2 day power and delay circuit 30. The output of the timer circuit 28 is connected to the set input of the flip-flop 29, and the output of the delay circuit 30 is connected to the set input of the flip-flop 29.
Connected to reset input. Q of flip flop 29
The output is connected to the other input of AND circuit 34.

The output of AND circuit 34 is connected to the control input of switch 36.

The operation of the wireless communication device having such a configuration will be explained. In the present invention, when the upper station fails in FIG. 5 and the channel identification synchronization signal from the base station 51 cannot be received for more than a specified time while power is being supplied to the non-wcJM, the relay station 52, 53 and the terminal station 54 performs battery saving using its own battery saving timing signal. Since the cycle of this battery saving is different from the cycle of the battery saving synchronization signal sent from the base station 51, it is possible to receive the channel identification synchronization signal from the base station 51 even if the upper station is restored again. When the battery saving synchronization signal is received, battery saving will be performed from now on.

Next, the operation of the terminal station will be explained. FIG. 3 is a time chart of battery saving using the channel identification synchronization signal of the wireless communication device of the present invention. FIG. 4 is a time chart of battery saving using the battery saving timing signal of the wireless communication device of the present invention. Third
In the figure and FIG. 4, To, T+. is the battery saving period, T(11, T11 is the power "on" period, and T.2, T'+t is the power "off" period. In FIG. 1, the synchronization signal for channel identification from the base station 51 and the battery The saving synchronization signal passes through the antenna 1 and is demodulated by the radio device 2.The signal demodulated by the radio device 2 has a synchronization signal for channel identification detected by the synchronization signal detection circuit 3, and is input to the timer circuit 8.Timer circuit 8 While receiving the synchronization signal for channel identification, sends a "1" signal to the OR circuit 8. As a result, the output of the OR circuit 8 becomes "1" and sends rlJ to the other input of the AND circuit 7. On the other hand, the battery saving synchronization signal from the signal from the radio device 2 is detected by the pufferite saving synchronization signal detection circuit 4, and when the battery saving synchronization signal is detected, the flip-flop circuit 6 is reset. The Q output becomes "0" and the output of the AND circuit 7 becomes rOJ.

Therefore, the switch 11 is turned off, and power from the power source 12 is no longer supplied to the radio device 2. On the other hand, the output of the battery saving synchronization signal detection circuit 4 is also input to the timer circuit 5, and when the battery saving synchronization signal is detected, as shown in FIG. The output becomes "1", setting the flip-flop circuit 6, and setting the Q of the flip-flop circuit 6.
The output will be "1". On the other hand, the timer circuit 8 is set to "0" only when the synchronization signal is not continuously detected by the synchronization signal detection circuit 3 for more than the buffer saving period T0 shown in FIG.
" is sent to the OR circuit 10, so "1" is input to the OR circuit 10 under normal conditions. Therefore, since the output of the OR circuit 10 is "1",
Since the two inputs of the AND circuit 7 are each "1", the output of the AND circuit 7 is "1". Therefore, the switch 11 is turned "on" and power from the power source 12 is supplied to the radio device 2. Further, when the power "on" period Tel shown in FIG. 3 has elapsed, the battery saving synchronization signal is sent again from the base station 51, so the power supply to the radio device 2 is cut off again as described above. In this way, the channel identification synchronization signal is detected while the radio 2 is "on", and if the battery saving synchronization signal can be received during this period, the power supply to the radio 2 is turned "on". , it is turned "off" and performs panteri saving operation.

However, if the radio device 2 breaks down or the signal is no longer sent from the upper station to the lower station, the synchronization signal detection circuit 3 detects the channel identification synchronization signal for a specified period (battery saving period T0 or more). Since it is no longer detected, the output of the timer circuit 8 becomes "0". On the other hand, similarly, the battery saving synchronization signal detection circuit 4 no longer detects the pantry saving synchronization signal, so the Q output of the flip-flop 6 becomes "1". Furthermore, the signal from the battery saving timing generation circuit 10 is input to the AND circuit 7 via the OR circuit 10, so that
Since the switch 11 is controlled by the output of the battery saving timing generating circuit 9, the wireless device 2 performs a pantry saving operation based on the output signal of the battery saving timing generating circuit 9.

FIG. 4 shows the time relationship of the output signals from the panteri saving timing generation circuit 9. During the power "off" period 'Lx, the power to the hot wire machine 2 is cut off, and the power is "on".
During the period TIl, the power of the wireless Ja2 is "on". Further, in this case, the period relationship is determined so that the relationship T1° <To.

Therefore, when the failure of the wireless device 2 of the upper station is recovered, the channel identification synchronization signal and the battery saving synchronization signal are suddenly sent from the upper station during the power supply "on period T.I" shown in FIG. In this case, the maximum time to capture the channel identification synchronization signal is 1/T+o 1/T.

Therefore, the battery saving timing generation circuit 9 must be activated.
The channel identification synchronization signal can be captured even during battery saving by the output of . When the channel identification synchronization signal is detected by the synchronization signal detection circuit 3 4, a battery saving operation is performed based on the battery saving synchronization signal as described above.

Next, the operation of the relay station will be explained using FIG. 2. The channel identification synchronization signal and the puff pastry saving synchronization signal from the base station are demodulated by the reception m22 via the antenna 21, then regenerated by the regeneration circuit 23, modulated by the transmitter 24, and further sent to the lower station from the antenna 25. be done.

On the other hand, the demodulated signal from the receiver 22 is transmitted to the synchronization signal detection circuit 2.
A channel identification synchronization signal is detected at step 6 and is further input to the timer circuit 31. While receiving the channel identification synchronization signal, the output of the timer circuit 31 sends "1" to one input of the OR circuit 33, and simultaneously switches the switch 37 to "1".
"On". Further, when the battery saving synchronizing signal is detected by the battery saving synchronizing signal detection circuit 27, the output of the receiver 22 is delayed by a predetermined time in the delay circuit 30, and then the flip-flop 29 is reset, and one of the AND circuits 34 Since the input of the AND circuit 34 becomes "0", the output of the AND circuit 34 becomes "0", the switch 36 becomes "off", and power from the power supply 35 is no longer supplied to the receiver 22 and transmitter 24. The delay circuit 30 is configured to ensure that the power source 35 can supply power to the receiver 22 and transmitter 24 for a predetermined time even after receiving the battery saving synchronization signal so that the battery saving synchronization signal is reliably sent to the lower station. It is. The output of the battery saving synchronization signal detection circuit 27 is also input to the timer circuit 28, and when the battery saving synchronization signal is detected, the power supply "off" period T shown in FIG. 3 starts. After 2, the timer circuit 28
Since the output of the AND circuit 34 becomes "1", the flip-flop 29 is set and one input of the AND circuit 34 becomes "1", the output of the AND circuit 34 becomes "1" and the switch 36 is turned on. Therefore, power from power source 35 passes through switch 36 and switch 37 to receiver 2.
2 and receiver 24. Also, the timer circuit 31
The output becomes "0" when the output from the synchronization signal detection circuit 26 cannot be received for more than the puff pastry saving period shown in FIG. sends “1” to the OR circuit 33 and switch 37. Therefore, the power "on" period T shown in FIG.

After l has elapsed, the battery saving synchronization signal is sent again from the base station 51, so the receiver 2 again transmits the signal as described above.
2 and the transmitter 24 are cut off.

In this way, the battery saving operation is performed by turning on and off the power supply to the receiver 22 and the transmitter 24. However, if the receiver 22 malfunctions,
When the synchronization signal detection circuit 26 no longer detects the synchronization signal for channel identification due to a failure of the upper station, the output of the timer circuit 31 becomes "0" and the switch 37 is turned "off".
At the same time, the power from the power supply 35 is no longer supplied to the transmitter 24, and at the same time, the battery saving timing signal from the battery saving timing generating circuit 32 is inputted to the other side of the AND circuit 34 via the OR circuit 33. Also, since one input of the AND circuit 34 is "1", the battery saving timing signal of the battery saving timing generating circuit 32 is inputted to the switch 36 via the AND circuit 34, so that the receiver 22 receives the p power. The power from 35 is turned "on" and "off" by a signal from battery saving timing generating circuit 32.

〔Effect of the invention〕

As explained above, the present invention provides a method for detecting a battery from a battery saving timing generation circuit provided in each of a relay station and a terminal station when a synchronization signal for channel identification sent from a base station cannot be detected for a predetermined period of time. By performing battery saving operation using the saving timing signal, even if the upper station of the terminal station or relay station fails, or the radio of the relay station or terminal station fails, unnecessary power is supplied to the radio. Avoiding things that keep happening can have an excellent effect on reducing power consumption.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram of a terminal station of a wireless communication device according to an embodiment of the present invention. FIG. 2 is a block diagram of a relay station of a wireless communication device according to an embodiment of the present invention. FIG. 3 is a time chart of battery saving using the battery saving synchronization signal of the wireless communication device of the present invention. FIG. 4 is a time chart of battery saving using the battery saving timing signal of the wireless communication device of the present invention. FIG. 5 is a block diagram of a conventional wireless communication device. 1.21.25...Antenna, 2...Radio device, 3.
26... Synchronous signal detection circuit, 4.27... Puffy saving synchronization signal detection circuit, 5.8.28.31...
・Timer circuit, 6.29...Flip-flop, 7.
34...AND circuit, 9.32...Battery saving timing generation circuit, 10.33...OR circuit,
11.36.37...Switch, 12.35...Power supply, 22...Receiver, 23...Regeneration circuit, 24...
・Transmitter, 30...Delay circuit, To, T'+o...
・Battery saving cycle, Toi Tll...Power supply "
"on" period, TO2, T1□...Power "off j period.

Claims (1)

[Claims] (1) A base station, one or more relay stations that relay radio signals transmitted and received by this base station, and one or more terminals that transmit and receive radio signals with the above base station via this relay station. Each of the relay stations and the terminal station is a time division multiplex system comprising means for generating a battery saving signal based on the transmission signal of the base station, and means for switching on and off the power supply current based on the battery saving signal. In the connection type wireless communication device, each of the relay stations and terminal stations includes a battery saving timing generating means that generates the battery saving signal when a channel identification synchronization signal is not detected in the received signal continuously for a predetermined period of time or more. A wireless communication device characterized by: