JPS6225521A - Radio communication equipment - Google Patents

Abstract

PURPOSE:To prevent useless power consumption at the disconnection of a line from a host device by generating newly a signal and sending it to a low-order station when a channel identification synchronizing signal from a base station is not detected at a relay station for a prescribed time or over. CONSTITUTION:A radio signal including the channel identification synchronizing signal and a battery saving synchronizing signal from the host station (not shown) is sent to the relay station and received by a receiver 2 via an antenna 1. Then the result is sent to a low-order station (not shown) via a recovery circuit 3, a transmitter 4 and an antenna 5. The channel identification synchronizing signal is detected by a synchronizing signal detection circuit 6 and inputted to a timer circuit 8. The output of the timer circuit 8 is logical '0' when the synchronizing signal is interrupted for a specified time or over and generated newly by a synchronizing signal transmission circuit 17 and sent to the low-order station. Thus, useless power consumption is avoided.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention uses a time division multiple access system (TDMA system).
The present invention relates to a wireless communication device that performs one or more relay stations using a relay station, and has one or more slave stations scattered around the relay station. In particular, by intermittently supplying power to the transmitters and receivers of relay stations and slave stations,
Standby is related to battery saving, which saves power consumption.

〔overview〕

The present invention provides a time division multiple access wireless communication device in which one or more slave stations are connected to a base station via one or more relay stations, in which a synchronization signal for channel identification of the base station is transmitted at the relay station. By generating and transmitting a new synchronization signal for channel identification and battery saving synchronization signal to the lower station when no detection is detected for a specified period of time, there is no wasted time on the radio even if the line with the upper station is disconnected. To avoid the continuous supply of power, reduce power consumption, and to perform battery saving operations in synchronization with the base station's battery saving synchronization signal as soon as the base station's transmission signal can be received. This is what I did.

[Conventional technology]

FIG. 3 is a block diagram of a conventional wireless communication device. In FIG. 3, wireless communication is made up of one base station A, a relay station B that relays signals from this base station A, and a slave station C that communicates with base station A via this relay station B. A method of intermittently supplying power to the transceivers of relay station B and slave station C in the device is called battery saving. moreover,
When this device uses a time division multiple access system, each channel uses the same frequency, and the channels are distinguished by the temporal position (time slot) of the signal. Therefore, in order to connect the lines correctly, it is necessary for all relay stations B and slave stations C to detect synchronization signals sent from base station A to identify each channel. Therefore, in the case of time division multiple access, battery saving is synchronized so that all relay stations B and slave stations C synchronize and continue to power their radios.
The channel identification synchronization signal from base station A is reliably transmitted to slave station C.
It is being transmitted to That is, the base station A sends out a battery saving synchronization signal at regular intervals. When relay station B and slave station C detect the battery saving synchronization signal, they start battery saving. This battery saving is performed by supplying power to the radios of relay station B and slave station C so that they can always receive the battery saving synchronization signal sent from the base station at regular intervals while the radios of relay station B and slave station C are powered and operating. Intermittent operation is performed at fixed time intervals. In this way, power is supplied to the radio intermittently,
Try 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. for example,
In Fig. 3, if the line between base station A and relay station B is disconnected, that is, the upper-level radio equipment of relay station B+ is out of order, and relay station B is used for channel identification for a long time. If the synchronization signal and battery saving synchronization signal cannot be received, relay stations B2 to B and slave station C will also be unable to receive the channel identification synchronization signal and battery saving synchronization signal, and relay station B and slave station C will be unable to receive the synchronization signal and battery saving synchronization signal. Power will continue to be supplied to the radio for an extended period of time.

Such devices are used for radio communications in remote areas and during disaster emergencies, but due to poor power supply conditions, relay station B
The power source for slave station C must rely on batteries or solar cells. Therefore, it is desirable to continue supplying power to the radios of relay station B and slave station C for a long period of time, and to avoid wasting power as much as possible. In order to solve the above problem, there is a means for each station such as relay station B and slave station C to carry out battery saving independently when relay station B and slave station C cannot receive the synchronization signal from base station A. In this case, when a plurality of relay stations B are connected in series as shown in FIG. 3, for example, if the line between base station A and relay station B is disconnected, this relay station B Lower-level relay stations B, to B7 independently perform battery saving. In this case, as time passes, the timing at which each relay station B is supplying power to the radio, that is, the power supply
The timing of "off" is irregular. If the line between relay station B and base station A is restored at this time, relay station B+ starts relaying the channel identification synchronization signal and the battery saving synchronization signal, and also Battery saving operation is performed synchronously. However, when relay station B2's own timing of the power "on" period coincides with the power "on" period of relay station B, relay station B is turned on for the first time.
2 receives the synchronization identification for channel identification and the battery saving synchronization signal from the base station A, and thereafter performs a battery saving operation in synchronization with the battery saving synchronization signal. Similar operations are performed for relay stations B3 to Bn.

[Problem that the invention seeks to solve]

However, in such conventional wireless communication devices, if the line between one relay station and the higher-level station is disconnected, that relay station and lower-level station perform battery saving on their own, and then all relays are restarted after the line is restored. Stations and slave stations can now receive the base station's channel identification synchronization signal and battery saving synchronization signal, but there was a drawback that it took time for the battery saving operation to be performed in synchronization with the battery saving synchronization signal. .

The present invention solves the above-mentioned drawbacks, and even if the line with the upper station is disconnected, it avoids continuing to supply wasteful power to the wireless device, reduces power consumption, and makes it possible to receive the transmitted signal from the base station. It is an object of the present invention to provide a wireless communication device capable of performing a battery saving operation in synchronization with a battery saving synchronization signal of a base station as soon as possible.

[Means for solving problems]

The present invention relates to one base station, one or more relay stations that relay radio signals transmitted and received by this base station, and one or more relay stations that transmit and receive radio signals to and from the base station via this relay station. Each of the relay stations and the slave station includes means for generating a battery saving signal based on a channel identification synchronization signal and a battery saving synchronization signal included in the transmission signal of the base station, and When the signal includes battery saving timing generating means for outputting the battery saving signal when the channel identification synchronization signal is not detected continuously for a predetermined time or more, and means for opening and closing the power supply current according to the battery saving signal. In a division multiple access wireless communication device, the relay station generates a new channel identification synchronization signal when the channel identification synchronization signal from the upper station is not detected continuously for a specified period of time. and means for generating a new battery saving synchronization signal based on the output of the timing generation means and providing it to the lower station when the channel identification synchronization signal from the upper station is not detected for a predetermined time or more. It is characterized by containing.

[Effect]

The present invention provides a means for transmitting a synchronization signal for channel identification and a puff signal to a lower station when a synchronization identification for channel identification is not detected continuously for a predetermined time or more at a relay station. By sending out a saving synchronization signal, even if the line with the upper station is disconnected, unnecessary power is not supplied to the radio, reducing power consumption, and the base station's battery is immediately restored as soon as the line is restored. A battery saving operation can be performed in synchronization with the saving synchronization signal.

〔Example〕

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

FIG. 2 is a time chart of battery saving of the wireless communication device of the present invention. In Fig. 2, To is the battery saving period, TO+ is the delay time when the power is turned off after a delay from the battery saving synchronization signal, (Toz
rom) is the power "off" period and T'oz is the power "off" period
Indicates “on” period. FIG. 1 is a block diagram of a relay station of a communication control device according to an embodiment of the present invention. In Figure 1,
A radio signal including a channel identification synchronization signal and a battery saving synchronization signal from a higher-level station (not shown) is connected to the input of the receiver 2 via the antenna 1 and demodulated. The output signal of the receiver 2 is connected to the input of a reproducing circuit 3 and is reproduced. The output of the regenerator 3 is connected to the input of the transmitter 4 and modulated. The output of the transmitter 4 is sent to the lower station via the antenna 5.

On the other hand, the demodulated signal of the receiver 2 is branched and connected to the input of the synchronization signal detection circuit 6 and the input of the battery saving synchronization signal detection circuit 7. The output of the synchronization signal detection circuit 6 is connected to the input of the timer circuit 8. The output of timer circuit 8 is connected to one input of OR gate 9. Further, a battery saving timing signal from the battery saving timing generating circuit 10 is connected to another input of the OR gate 9. The output of OR gate 9 is connected to one input of AND gate 11.

Here, the detection signal of the synchronization signal detection circuit 6 is input and the specified time T is reached. If within 2, "1" from timer circuit 8 is OR gate 9
It is connected to AND gate 11 via. Further, the demodulated signal of the receiver 2 is branched and connected to the input of the battery saving synchronization signal detection circuit 7. The detection signal of the battery saving synchronization signal detection circuit 7 is connected to the other inverting input of the AND gate 11. "0" from the AND gate 11 is connected to the input of the delay circuit 12 and the timer circuit 13.

A predetermined time T from the delay circuit 12. After I, "1" is connected to the R input G of the flip-flop circuit 14 and reset. “0” from the Q output of the flip-flop circuit 14 is connected to the control input of the switch circuit 15.
(It is assumed that the flip-flop circuit 14 is set as an initial state, and "1" from the Q output is connected to the control input of the switch circuit 15, so that the switch circuit 15 is in the "on" state.)

A predetermined time T from the timer circuit 13. After 2, "1" is connected to the S input of the flip-flop circuit 14 and set.

"1" from the Q output of the flip-flop circuit 14 is connected to the control of the switch circuit 15, and the switch circuit 15 is turned "on". Power from a power source 16 is connected to the receiver 2 and transmitter 4 via a switch circuit 15.

Here, the feature of the present invention is the synchronization signal sending portion surrounded by the dashed line. That is, the synchronization signal detection circuit 6
The detection signal of is the specified time T. When 2 or more are not input, "0" from the timer circuit 8 is connected to the OR gate 9. Also, "Oj" is branched from the timer circuit 8 and connected to the input of the synchronization signal transmission circuit 17.
When the human power is "0" from 7, the synchronization signal for channel identification is connected to the input of the transmitter 4 and sent out to the lower station via the antenna 5. The puffer saving timing signal of the battery saving timing generating circuit 10 from the OR gate 9 is connected to one input of the AND gate 11 and the input of the battery saving synchronization signal sending circuit 18 . The output of the battery saving synchronization signal detection circuit 7 is “0”.
'', a battery saving timing signal is output from the AND gate 11, and a battery saving operation is performed based on the battery saving timing signal. Further, a battery saving synchronizing signal is connected to the input of the transmitter 4 based on the battery saving signal from the battery saving synchronizing signal sending circuit 18, and is transmitted from the transmitter 4 to the lower station via the antenna 5.

The operation of the communication system pavement 1 relay station having such a configuration will be explained. The channel identification synchronization signal and the battery saving synchronization signal sent from the base station are demodulated by the receiver 2 via the antenna 1, regenerated by the regeneration circuit 3, modulated by the transmitter 4, and further transmitted by the antenna 5 to the lower station. sent to. On the other hand, from the signal demodulated by the receiver 2, a synchronization signal for channel identification is detected by a synchronization signal detection circuit 6, and is inputted to a timer circuit 8. The output of the timer circuit 8 is "while detecting the channel identification synchronization signal and unless the channel identification synchronization signal is interrupted for a specified time or more".
1'', and this signal is input to the AND gate 9 and simultaneously input to the synchronization signal sending circuit 17. The synchronizing signal sending circuit 17 does not operate when the output from the timer circuit 8 is "1".

Now, the Q output of the flip-flop 14 is "1" (for ease of explanation, initially this output is "1").
”. ) The switch circuit 15 is "on", and power is supplied from the power supply 16 to the receiver 2 and the transmitter 4. In this state, when the battery saving synchronization signal is detected by the puffer saving synchronization detection circuit 7, “1
'' is inverted, and the signal ``0'' passes through the AND circuit 11 and controls the timer circuit 13 and the delay circuit 12. When the battery saving synchronization signal is detected, the predetermined time T”01
Afterwards, the flip-flop circuit 14 is reset. Since the Q output of the flip-flop circuit 14 becomes "0", the switch circuit 15 becomes "off" and power is no longer supplied to the receiver 2 and transmitter 4.

Even if the delay circuit 12 detects the battery saving synchronization signal, it does not turn off the power of the receiver 2 and the transmitter 4 for a predetermined period of time To+, so that the battery saving synchronization signal can be reliably sent to further lower stations. There is.

On the other hand, the output of the timer circuit 13 becomes "1" after a predetermined time T'oz after detecting the battery saving synchronization signal, and the flip-flop circuit 14 is sent. Since the Q output of the flip-flop circuit 14 is "1", the switch circuit 15 is turned "on", and the power from the power supply 16 is transferred to the receiver 2.
and is supplied to the transmitter 4.

Since the battery saving synchronization signal from the base station is transmitted at a period of T0 as shown in FIG. 2, (T o!
The power supply is "off" during the period T o 1), and the period T.

3, the battery saving operation is performed so that the type source is turned on. On the other hand, the output of the timer circuit 8 is for a period 'r'.
Even if there is no output from the synchronization signal detection circuit 6 during oz.
”.

Now, if the receiver 2 fails or the upper station fails and the channel identification synchronization signal and battery saving synchronization signal are no longer received, the synchronization signal detection circuit 6 will no longer detect the synchronization signal, so after a predetermined time T'oz or more, The output of the timer circuit 8 becomes rOJ.

A synchronization signal for channel identification is sent out from the synchronization signal sending circuit 17, modulated by the transmitter 4, and then sent from the antenna 5 to the lower station, so that relay stations and slave stations lower than this relay station use the channel identification synchronization signal. It will synchronize with the sync signal. Further, since one of the OR gates 9 is rOJ, the battery saving timing signal of the battery saving timing generation circuit 10 passes through the OR gate 9 to control the AND gate 11 and simultaneously controls the battery saving synchronization signal sending circuit 18. Therefore, when the output of the OR gate 9 is "0", the battery saving synchronization signal is sent out from the battery saving synchronization signal sending circuit 18. Furthermore, since the output of the antogenide 11 becomes "0", the timer circuit 13 and the delay circuit 12 operate,
Since the flip-flop circuit 14 is reset by the delay circuit 12 after a predetermined time TOI, the switch circuit 15
is turned "off" and power is no longer supplied to the receiver 2 and transmitter 4.

In addition, 1. The output of the timer circuit 13 is "
1'', the flip-flop circuit 14 is set, and the switch circuit 15 is turned on, and power is supplied to the receiver 2 and transmitter 4 again.

When the channel identification synchronization signal from the base station cannot be received in this way, the battery saving timing generator 10 performs a battery saving operation according to the period of the battery saving timing generating circuit 10, and at the same time the lower station receives the channel identification synchronization signal sent from the relay station and the battery. Battery saving operation is performed by the saving synchronization signal.

Next, when the failure of receiver 2 is repaired or it is switched to a standby unit and becomes able to receive the channel identification synchronization signal and battery saving synchronization signal from the base station,
Synchronizes again with the channel identification synchronization signal from base station A,
The lower relay station and slave station also perform battery saving operations at the same time.

〔Effect of the invention〕

As explained above, in the present invention, when a signal sent from a base station cannot be detected for a specified period of time, the relay station generates a channel identification synchronization signal and sends it to the lower station. The battery saving operation continues 81 times by sending a battery saving synchronization signal to the lower station based on the output signal from the battery saving timing generating circuit located in the station, and at the same time controlling the power supply to the wireless device. This makes it possible to avoid continuing to supply wasteful power to the wireless device even if the line with the upper station is disconnected, reducing power consumption, and immediately relaying all signals once a signal is received from the base station. There is an excellent effect that the station and the slave station can perform battery saving operations in synchronization with the battery saving synchronization signal from the base station.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a relay station of a wireless communication device according to an embodiment of the present invention. FIG. 2 is a time chart of battery saving of the wireless communication device of the present invention. FIG. 3 is a block diagram of a conventional wireless communication device. 1.5...Antenna, 2...Receiver, 3...Regeneration circuit, 4...Transmitter, 6...Synchronization signal detection circuit, 7
...Battery saving synchronization signal detection circuit, 8.13
... timer circuit, 9 ... OR gate, 10 ... battery saving timing generation circuit, 11 ... AND gate, 12 ... delay circuit, 14 ... flip-flop circuit, 15 ... switch circuit , 16...Power source, 17...Sync signal output path, 18...Battery saving sync signal output circuit. Example battery saving time chart Older brother 2 Existing example overall diagram 33 times

Claims (1)

[Claims] (1) One base station, one or more relay stations that relay radio signals transmitted and received by this base station, and one or more relay stations that transmit and receive radio signals with the above base station via this relay station. each of the relay stations and the slave station includes means for generating a battery saving signal based on a channel identification synchronization signal and a battery saving synchronization signal included in the transmission signal of the base station; and a received signal. A time sharing device comprising: battery saving timing generating means for outputting the battery saving signal when the channel identification synchronization signal is not detected continuously for a predetermined time; and means for switching on and off the power supply current according to the battery saving signal. In a multiple access type wireless communication device, the relay station generates a new channel identification synchronization signal and transmits it to the lower station when the channel identification synchronization signal from the upper station is not detected continuously for more than a specified time. and means for generating a new battery saving synchronization signal based on the output of the battery saving timing generating means and providing it to the lower station when the channel identification synchronization signal from the upper station is not detected for a predetermined time or more. A wireless communication device comprising: