JP3018376B2 - Wireless relay system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless relay system, and more particularly, to a wireless relay system that uses a time-division communication system and relays via one or more relay stations. More specifically, the present invention relates to a wireless relay system in which battery saving is improved.

[Conventional technology]

Some wireless communication systems use a communication system in which communication is performed between a base station and a slave station, which is a terminal station, via a relay station. In this case, power is intermittently supplied to a wireless device, that is, a transceiver. Some batteries employ a battery saving method for reducing power consumption during standby time by supplying power to the power supply.

FIG. 4 shows an example of the configuration of this type of communication system, in which one base station, a plurality of relay stations cascaded so as to relay communication signals transmitted and received by the base station, and the relay station FIG. 4 is a system configuration diagram of a wireless communication system including a plurality of slave stations (only one is illustrated in the figure) that communicates with a base station via the mobile station. Specifically, as illustrated in FIG.
It is composed of one base station 1, relay stations 2 and 3 for relaying signals from the base station 1, and slave stations 4 for communicating with the base station 1 via the relay station. In such a communication system, a method of intermittently supplying power to the radios of the relay stations 2 and 3 and the slave station 4 is called battery saving. This is required in the case of a telephone T, for example, a remote telephone, which must rely on a battery or solar electricity.

Although only one slave station 4 is shown in FIG. 4, a plurality of branch stations that are scattered around the relay station and communicate with the base station 1 via the relay station are shown. As a terminal station. Furthermore,
In the case of the time division communication system in which communication between the base station 1 and the slave station 4 as such a terminal station is performed by time division multiple access, the relay stations 2 and 3 and the slave station 4 are synchronized with each other as described above. In order to perform battery saving, a method of transmitting a battery saving synchronization signal (BS-SYNC signal) from the base station 1 is adopted.

That is, when the system is a time-division system, each channel uses the same frequency, and each channel is distinguished by the time position (time slot) of the signal. Therefore, in order to correctly connect the lines, in FIG. 4, all of the relay stations 2 and 3 and the slave station 4 detect a synchronization signal for identifying each channel transmitted from the base station 1. There is a need. Therefore, in the case of the time division method, the above-mentioned battery saving is synchronized, all the relay stations and slave stations are synchronized, the power of the radio is turned off, and the synchronization for channel identification from the base station is performed. The signal is transmitted to the slave station without fail.

For example, this is performed as follows. That is,
As shown in FIGS. 5 and 6, a specific synchronization signal (BS-SYNC) for battery saving is transmitted from the base station 1 at a constant period.
Signal). When the relay stations 2, 3 and the slave station 4 detect the BS-SYNC signal, they start the battery saving operation. Then, as shown in FIG. 6, this battery saving is performed at a predetermined cycle from the base station 1 while the power is supplied to the radio equipment of the relay stations 2 and 3 and the slave station 4 and operating. the sent to come BS-SYNC signal to always be able to receive the time interval of an intermittent operation of the power supply (Note that in FIG. 6, t ₁ represents the time indicates the power off) so as to be performed by defining a To In this way, the power supply of the wireless device is intermittently performed to reduce the power consumption.

Such communication under battery saving can be realized as follows.

First, when a call is made between the base station 1 and the slave station 4, a call signal is transmitted from the slave station 4 while power is being supplied. When the relay stations 2 and 3 receive the start code out of the call signals as shown in FIG. 7, the relay stations 2 and 3 stop the battery saving operation, so that the base station 1 and the slave station 4 can enter a talking state. That is, the power is not turned on and off, and the power is continuously turned on.

In the case of an incoming call operation, an incoming call signal is sent from the base station 1 to the slave station 4 during the time when power is supplied, and when the incoming call signal is received by the slave station 4, a response signal is sent to the base station 1. Send out toward. In this case, when the relay stations 2 and 3 receive the response signal from the lower station, the relay stations 2 and 3 stop the battery saving operation in the same manner as described above, so that the base station 1 and the slave station 4 can enter the communication state. is there.

[Problems to be solved by the invention]

However, in battery saving in the conventional wireless communication system, the time for turning off the power is uniformly set to a constant value, and there is still room for improvement such as not being sufficient for reducing power consumption. There is.

Hereinafter, this will be described. As described above, the relay station and the slave station perform the battery saving operation by the BS-SYNC signal from the base station. Is set in the relay station and the slave station, and this time is a constant value.

Therefore, if attention is paid to turning on and off the power now, the ratio t to the time t _off for turning _{off the} power and the time t _on for turning on the power is t.
_{When off} / t _on can reduce power consumption by battery saving operation extent is larger, the time required for call connection with the slave station 4 and the base station 1 of FIG. 4 the time to turn off the power is long is long In addition, there is a high possibility that a plurality of slave stations (not shown) simultaneously perform a call operation, and the call operation may not be performed. Here, in the former case, the time is from the time when the telephone T connected to the slave station 4 is off-hook to the time when the telephone set enters the communication state, so that a certain long time does not cause any problem. This situation must be avoided because the call cannot be made.

Therefore, from such a point of view, the time for turning off the power cannot be uniformly made too long. Conversely, the longer the power-on time is, the lower the possibility that a plurality of child stations will simultaneously make a call will be, and more call processing and incoming call processing will be possible.

Furthermore, if attention is paid to the occurrence of a call, the occurrence of a call by a plurality of slave stations greatly fluctuates depending on the time zone. In general, there is usually a tendency to be more during the day and less during the night,
Battery saving, as described above, is required for remote telephones that must rely on batteries or solar cells to power relay stations and slave stations, and therefore, even during times of heavy call time, calls can be saved. If battery saving is performed in the same battery saving cycle even in a small time period, depending on this cycle, the power consumption in a time period with a small number of calls will be the same as the power consumption in a time period with a large number of calls, which wastes power. In this regard, the conventional one has room for improvement.

In particular, in the case of a solar cell, since the solar cell does not operate at night, there is a problem that the power stored in the battery is consumed more wastefully.

Furthermore, if the power-on time of the battery saving operation is made sufficiently shorter than the power-off time so as to minimize power consumption, a problem that call loss increases in a time period when there are many calls will occur. .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless relay system capable of realizing a further power saving effect in a wireless communication system using battery saving and minimizing a call loss of a call. .

[Means for solving the problem]

The present invention includes one base station, a relay station that relays a communication signal transmitted and received by the base station, and a slave station that communicates with the base station via the relay station. A wireless relay system in a communication system in which communication is performed using a time division communication system, wherein a base station periodically inserts a battery saving synchronization signal into a transmission signal even when a part of the relay station is communicating. The relay station comprises: a first detecting means for receiving and detecting the battery saving synchronization signal; and at least one of a device necessary for relaying the communication signal when the battery saving synchronization signal is received. Power cutoff means for cutting off the power of the unit, second detection means for receiving and detecting a specific signal indicating a call connection transmitted from a relay station lower than the relay station or a slave station connected to the relay station, Specific signal Prohibiting means for prohibiting the operation of the power supply cutoff means when received, and switching control means for controlling to selectively switch and set the power supply cutoff time, wherein the switching control means receives the specific signal. A timer that operates when the power runs out, wherein first timer means for determining a first shutoff time for shutting off the power supply, and when a time interval at which the specific signal can be received exceeds a predetermined time, Second timer means for determining a second shutoff time for shutting off the power supply longer than the first shutoff time, and determining whether a time interval at which the specific signal can be received exceeds the predetermined time. And a third timer means for performing the operation.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a configuration of a base station applicable to the system according to an embodiment of the present invention, and FIG. 2 similarly shows an example of a configuration of a relay station.

This embodiment is directed to a time division multiple access system as shown in FIG. That is, one base station 1
And relay stations 2 and 3 continuously connected to relay signals transmitted and received by the base station, and communicate with the base station 1 via the relay stations scattered around the relay station. It is composed of a plurality of branch terminal stations 4 (only one is shown in the figure), and can be implemented in a communication system in which communication between the base station 1 and the slave station 4 is performed by time division multiple access. The signal frames and time slots used in this case are as follows.

That is, FIG. 5 is a diagram showing the frame structure of the signal used in the system configuration of FIG. 4. As for the time slots used, as shown in FIG. It is assumed that a preamble signal and a synchronization signal are successively transmitted, and then a battery saving synchronization signal (BS-SYNC signal) is transmitted. On the other hand, the communication time slot #N in one frame is composed of a preamble signal, a start code signal and information as shown in FIG.

Under such a signal form, in the present embodiment applied to the system of FIG. 4, the relay stations 2 and 3 and the slave station 4 transmit a battery saving synchronization signal in order to perform battery saving in synchronization. The base station 1 includes means for transmitting a battery saving synchronization signal having a constant period even when some of the relay stations are performing communication.
Detecting means for receiving and detecting a synchronization signal, switching means for turning on and off the power supply in synchronization with the synchronization signal, detection means for receiving a signal transmitted from a station lower than the relay station, Means for turning on the power supply and stopping battery saving only when a signal from the base station is received, and a timer means which operates after the signal from the lower station is cut off. A switching means for selecting outputs of a plurality of timer means for determining a power-off time; further, a signal including a start pattern is transmitted from a lower station from a relay station; It has a means for receiving and detecting a signal containing a pattern and a timer means for determining a time for turning off a plurality of power supplies activated by an output of the detection means.

Specifically, first, in FIG. 1, which is a detailed block diagram of the base station 1 in one embodiment of the present invention, reference numeral 5 denotes a concentrator circuit, which is connected to the exchange 12.
Further, the base station 1 has an antenna 6, and each is connected to receive an external signal via an antenna duplexer 7, a receiver 8, and a decoder 9 which are sequentially connected from the antenna 6. The output side of the concentrator 5 is connected to an encoder 10, and the output of the encoder 10 is connected to an antenna duplexer 7 via a transmitter 11, so that a signal is transmitted to the outside via the antenna 6. It is configured.

Further, the base station 1 has a synchronizing signal generating circuit 14 and a BS-SYNC signal generating circuit 13. The synchronizing signal generating circuit 14 for generating a signal of a fixed period is transmitted through the BS-SYNC signal generating circuit 13 to the transmitter 11. The BS-SYNC signal generating circuit 13 is connected to the exchange 12.

In the configuration of the base station 1, the means for periodically inserting the battery saving synchronization signal into the transmission signal even when a part of the relay station is communicating includes the above-described BS-SYNC signal generation circuit 13. Have been.

Next, the configuration of the relay station will be specifically described. In FIG. 2 which is a block configuration diagram of the relay station in one embodiment of the present invention, the relay station includes antennas 15 and 21 and antenna duplexers 16 and 20. , Receivers 17, 22, reproduction circuits 18, 23, transmitter 19,
24, a power source 36, a switch 37 for controlling the power source 36, and the like have a basic configuration.

Antennas 15 and 21 are coupled to antenna duplexers 16 and 20, respectively. The antenna duplexer 16 is a playback circuit via the receiver 17
The output of the reproducing circuit 18 is input to a transmitter 19. Also, the output of transmitter 19 is coupled to antenna duplexer 20. On the other hand, the output of the antenna duplexer 20 is input to the receiver 22, and the output of the receiver 22 is input to the transmitter 24 via the reproduction circuit 23. Then, the output of the transmitter 24 is input to the antenna sharing device 16.

Here, the former reception / transmission system is used for relaying from the upper station to the lower station, and the latter is used for relaying from the lower station to the upper station.

As for the power supply 36, this serves as a power supply for at least a part of a device necessary for relaying a communication signal. In the illustrated example, the fixed terminal side of the switch 37 for the power supply 36 is a receiver.
17,22 and transmitters 19,24.

Further, the relay station is provided with means for detecting and receiving the BS-SYNC signal, and means for shutting off the power supply 36 in synchronization with the reception of the BS-SYNC signal, including the switch 37. That is, first, the BS-SYNC signal detector 25 is connected to the reproduction circuit 18, and the output side of the detector 25 is connected to the first
, A second timer 28 and a delay circuit 26, respectively.

Here, as will be described later, the timer 27 operates when a specific signal transmitted from a relay station lower than the relay station or a slave station connected to the relay station is no longer received. The first timer means determines the time during which the power supply 36 is turned off, and the timer 28 constitutes the second timer means which determines the time during which the power supply 36 is shut off when the time interval at which the specific signal can be received exceeds a certain time.

Specifically, in FIG. 2, the output terminal of the first timer 27 is connected to one fixed terminal of the switch 29, and the output terminal of the second timer 28 is connected to the other fixed terminal of the switch 29. The output side (movable contact side) of the switch 29 is connected to the set terminal (S) of the flip-flop 30, while the output terminal of the delay circuit 26 is connected to the reset terminal (R) of the flip-flop 30. Have been. And
The output terminal (Q) of the flip-flop 30 is connected to an OR circuit 31.
And the output terminal of the OR circuit 31 is connected to the power supply
It is connected to the control terminal of a switch 37 for 36.

The shutoff of the supply of the power supply 36, and thus the on / off control of the switch 37, is controlled by the OR circuit 31 including those during battery saving, switching and changing the shutoff time, and stopping (prohibiting) battery saving. It is controlled by the control output taken out.

Further, in addition to the above, the relay station may include a means for receiving a specific signal transmitted from a relay station lower than the relay station or a slave station connected to the relay station, and a BS-SYNC when receiving the specific signal. Means is provided for prohibiting a power-off operation even when a signal is detected and received. That is, as described above, the start pattern detection circuit 32 is connected to the reproduction circuit 23 in the system of the receiver 22, the reproduction circuit 23, and the transmitter 24 for relaying from the lower station to the higher station, and the output side thereof Is the set terminal (S) of the timer 33 and the flip-flop 34
It is connected to the. The output terminal of the timer 33 is connected to the reset terminal (R) of the flip-flop 34, and the output terminal (Q) of the flip-flop 34 is connected to the other input terminal of the OR circuit 31 and the third timer 35. The output terminal of the third timer 35 is connected to the control terminal of the switch 29 described above.

Here, the timer 35 selects either the output of the first timer 27 or the output of the second timer 28 and takes out an output for controlling whether the output should be supplied to the set terminal (S) of the flip-flop 30. Specifically, it constitutes a third timer means for determining whether the time interval at which a specific signal can be received is longer or shorter than a predetermined time.

As described above, in the wireless relay system in the time division communication system according to the present embodiment, one base station 1 and this base station 1
A plurality of relay stations 2 and 3 continuously connected to relay communication signals transmitted and received by the base station 1 and the base station 1 via the relay stations 2 and 3
In a wireless communication battery saving method including a slave station 4 communicating with the base station 1, the base station 1 periodically transmits a battery saving synchronization signal to a transmission signal even when a part of the relay station is communicating. Means for inserting, wherein the relay station comprises:
Means for receiving and detecting a battery saving signal; means for shutting off at least a part of the power of a device necessary for relaying a communication signal when the battery saving signal is received by the means; Means for receiving a specific signal transmitted from the relay station or the slave station 4 connected to the relay station, and when this means receives the specific signal, shuts off the power supply even if the reception of the battery saving signal is detected. Means for prohibiting the operation of the means, and operate when a specific signal transmitted from a relay station lower than the relay station or a slave station 4 connected to the relay station is no longer received. First timer means for determining a time during which power to at least a part of a necessary device is cut off, and a time interval at which a specific signal can be received is a fixed time or more. When it comes to includes a second timer means for determining the time that the power is turned off, and a third timer means for time intervals which can receive a specific signal to determine the following or a predetermined time or longer.

Hereinafter, the operation of each station device configured as described above will be described more specifically with reference to FIG. 3 and the like.

FIG. 3 is a diagram showing a time relationship of battery saving according to the present embodiment, in which the BS-SYNC signal and the relay stations 2, 3 are shown.
4 shows how the power supply is turned on and off on the slave station 4 side. The operation of the relay station will be mainly described with reference to the relay station 3 in FIG.

First, in FIG. 1, on the side of the base station 1, a synchronization signal of a fixed period is transmitted from the synchronization signal generation circuit 16, and a BS-SYNC signal is generated by the BS-SYNC signal generation circuit 13 in response to this output. . The synchronization signal and the BS-SYNC signal are transmitted in the relationship shown in FIG. 3, and are transmitted to the relay stations 2, 3 and the slave station 4 via the transmitter 11, the antenna duplexer 7, and the antenna 6. That is, it is inserted into the communication signal and relayed.

Here, when an incoming call from the exchange 12 occurs, communication is performed between the exchange 12, and thus between the base station 1 and the slave station 4, as follows. That is, when an incoming call from the exchange 12 occurs, a ringer signal is detected by the concentrator circuit 5, and an incoming call signal is generated. The incoming signal is determined based on the signal from the BS-SYNC signal generating circuit 13 and the relay stations 2, 3 and the slave station 4 are respectively coded at the time when the battery saving is stopped.
Sent out via 10. On the other hand, a response signal to the incoming call signal from the slave station 4 is received by the receiver 8 via the antenna 6 and the duplexer 7, and further received by the concentrator 5 via the decoder 9. . Therefore, at this point, a wireless line is formed between the base station 1 and the slave station 4, and the exchange 12 and the slave station 4 can communicate with each other.

Next, battery saving in the relay station while the BS-SYNC signal is being transmitted from the base station 1 and transmission to the lower station will be described.

First, in FIG. 2, assuming that a BS-SYNC signal is transmitted from the base station 1, this BS-SYNC signal
15, BS via antenna duplexer 16, receiver 17, reproduction circuit 18
-Detected by the SYNC signal detector 25,
-SYNC pulses after being given time t ₀ delay as shown in Figure 6 by the delay circuit 26, it is applied as a reset input of the flip-flop 30 of FIG. 2. Here, the flip-flop 30 is reset by the BS-SYNC pulse delayed by the delay circuit 26, outputs an output to the switch 37 based on the reset, and opens the switch 37 to the state shown in FIG. Receiver 17,22, transmitter 19,24
Disconnect power supply to Incidentally, the delay circuit 26 to have a longer time in the sixth by a time t ₀ as shown in FIG battery saving is so that BS-SYNC signal is transmitted securely to the lower station.

On the other hand, the output of the BS-SYNC signal detector 25 also starts the operation of the first timer 27 and the second timer 28,
The timer 27 and the second timer 28 send outputs to the switch 29 after a lapse of a predetermined time. Here, the first timer 27 and the second
Are set differently. This will be described in more detail later.

Now, the output of the first timer 27 and the output of the second timer 28 are selected by the switch 29, and the output generated after a lapse of a predetermined time from the selected switch 29 is input to the flip-flop 30, whereby The flip-flop 30 is set again, and a control signal is supplied to the switch 37 through the OR circuit 31 to supply power to the receivers 17 and 22 and the transmitters 19 and 24 again based on the set. Is turned on.

Next Here, the time of the first timer 27, and specifically are set as battery saving after 0 hours t _1OFF from a battery saving is performed in Figure 3 is stopped, while the more t _{10 N} time Is received. Also, the second timer 28 side, battery saving from battery saving is performed after t _2off is set to stop, thus following BS-SYNC between more t _2ON time in the same manner It starts receiving signals. In FIG. 2, BS-SYNC
The signal is further transmitted to a lower relay station or a slave station (slave station 4 in the example of FIG. 3) through the transmitter 19, the antenna duplexer 20, and the antenna 21 while the power is supplied to the transceiver. You.

Thus, the BS-SYNC signal is transmitted.

Next, in such a process, the mode of battery saving is changed (switched) when an incoming call occurs.
This will be described below, including the following.

First, when an incoming call occurs, a response signal is transmitted immediately after the incoming signal is received by the slave station 4, and the response signal is transmitted to the antenna 21, the antenna duplexer 20, and the receiver shown in FIG. Two
2. After passing through the reproduction circuit 23, it is further transmitted to the base station 1 via the transmitter 24, the antenna duplexer 16, and the antenna 15.

On the other hand, at this time, the response signal that has passed through the reproduction circuit 23 is detected by the start pattern detection circuit 32, whereby the start pattern detection circuit 32
Is set, and its output (Q output) passes through the OR circuit 31 to close the switch 37, so that the power is supplied from the power supply 36 to the transceiver.

Furthermore, the output of the start pattern detection circuit 32 is
The operation of 33 is also started. This is from the following viewpoint. In other words, the timer 33 outputs its output after a certain period of time has passed, but since a response signal is obtained from the lower station to the next or a line is established, a call signal is continuously transmitted. Before the timer 33 elapses a predetermined time, the timer 33 resumes its operation.
Therefore, the reset output is not sent from the timer 33 to the flip-flop 34 until the call ends.

On the other hand, once the call is finished, the output from the timer 33 resets the flip-flop 34, and thereafter the control of the switch 28 is operated by the BS-SYNC signal, and in this case, it is determined by the time of the first timer 27. That is, the battery saving operation is performed in the specified time.

Further, when the flip-flop 34 is reset, the third timer starts operating in addition to the above, and if a call connection is not made within a predetermined time, the switch 29 is output by the third timer 35 to switch the switch 29. Is controlled, and the battery saving operation is performed for the time determined by the second timer 28 thereafter.

In this way, the mode of battery saving is selectively switched and controlled. Specifically, as shown in FIG. 3, since the BS-SYNC signal transmitted from the base station 1 has a constant period, when the battery saving operation is performed by the time determined by the first timer 27, The power on time is t _1ON and the power off time is t _1OFF .
On the other hand, when the call between the base station 1 and the slave station 4 ends and the time t _OFF determined by the third timer 35 elapses as described above, the second
The battery saving operation by the time determined by the timer 28 is performed, the power-on time t _2ON, the time of the power-off is to be t _2off.

In this case, the time of t _OFF by the third timer 35 can be set as the longest time between calls in a time zone where calls frequently occur, for example, about 10 minutes. Further off-time t _2off by the first timer 27 off-time t _1OFF and second timer 28 by the By such a t _1OFF <t _2OFF, if you are a battery saving operation in a time of t _1OFF The setting can be made so that the power saving effect can be more sufficiently obtained when the battery saving operation is _{performed in} the time _t2OFF than the power saving effect.

Therefore, the relay station does not turn _off t _OFF during a time period when calls frequently occur.
Call should occur within the time of
Since it is unlikely that a call can be separated for 10 minutes, t _1ON and t _1OFF are emphasized in this time zone, with emphasis on suppressing _{call loss.}
The battery saving operation is performed for the time determined by, and no call is generated within t _OFF during a time when the occurrence of a call is small,
In other words, in this case, _t2ON and t2
Battery saving operation will be _performed in the time determined by _2OFF .

In this manner, in this embodiment, it is possible to switch the battery saving in two stages, and it is possible to realize an appropriate battery saving operation according to the situation, as compared with the conventional method in which the battery saving is set uniformly.

Next, a description will be given of an outgoing call, which can be performed as follows.

That is, in the case of a call, a call signal is transmitted from the slave station 4 when power is supplied to the transceiver of the relay station. The outgoing call signal is similar to the response signal in the incoming call,
It is received by the start pattern detection circuit 32 of FIG. 2, and thereafter, the battery saving operation is similarly stopped.

Here, in the operation of the slave station 4 in this case, it is not necessary to change the battery saving time depending on the frequency of occurrence of the call unlike the relay station, and the time of t _2ON and t _2OFF in the battery saving operation of FIG. Can be used. That is, t _2OFF
When the telephone T is off-hook at the time, the power supply to the transceiver is immediately turned on. At this point, if the time of the relay station is on at _t1ON , the calling connection can be established.

As described above, in the present embodiment, the power-on time and the power supply are set so that the call loss is minimized in the battery saving operation in the time period when the call occurrence frequently occurs such that the call occurrence occurs within a predetermined time. The off-time is determined, and during a battery saving operation in a time period in which a call does not occur in a fixed time, that is, in a time period in which a call does not frequently occur, a longer power-off time and a shorter power-on time than a time period in which a call frequently occurs. In addition, even if calls occur more frequently in slave stations lower than a specific relay station, a relay station that does not contribute to the line connection with the slave station has a lower child station than the relay station. If the occurrence of the call is small, a battery saving operation suitable for a time period in which the occurrence of a call is small is performed, and the relay station eliminates the waste of power and obtains its saving effect.

In the present embodiment, the case where the mode of battery saving is switched to two stages has been described. However, when changing the time of battery saving, more time may be used, and an improvement is made so that control can be performed in more detail according to the situation. May be added.

Further, the present invention can be implemented even when the number of relay stations and slave stations is one.

〔The invention's effect〕

As described above, according to the present invention, it is possible to selectively switch the time ratio of power cutoff to the cycle of battery saving, and to further reduce the power saving effect as compared with the case where the power cutoff time is fixed uniformly. Can be planned,
In addition, there is an effect that it is possible to minimize a call loss due to power cutoff according to the state of call connection.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a base station in an embodiment of the present invention, FIG. 2 is a block diagram showing an example of a configuration of a relay station, and FIG. 3 is an example of battery saving in the embodiment system. FIG. 4 is a system configuration diagram showing an example of a time division multiplexing multi-access system. FIG. 5 is an example of a signal frame configuration used in the system configuration of FIG. 4 and applicable to the present invention. FIG. 6, FIG. 6 is a diagram showing a time relationship for explanation of basic battery saving, and FIG. 7 is a diagram showing an example of a configuration of one time slot. 1 base station 2,3 relay station 4 slave station 5 concentrator circuit 6,15,21 antenna 7,16,20 antenna duplexer 8,17,22 receiver 9 …… Decoder 10 …… Encoders 11,19,24 …… Transmitter 12 …… Exchanger 13 …… BS-SYNC signal generation circuit 14 …… Synchronization signal generation circuit 18,23 …… Reproduction circuit 25 …… BS- SYNC signal detector 26 delay circuit 27 first timer 28 second timer 29, 37 switch 30, 34 flip-flop 31 OR circuit 32 start pattern detection circuit 33 … Timer 35… Third timer 36… Power supply T… Telephone

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04J 3/00-3/26 H04B ⁷ /24-7/26

Claims (1)

(57) [Claims] An information processing system includes a base station, a relay station for relaying a communication signal transmitted and received by the base station, and a slave station communicating with the base station via the relay station. Is a wireless relay system in a communication system in which communication is performed using a time-division communication method, wherein the base station periodically inserts a battery saving synchronization signal into a transmission signal even when a part of the relay station is communicating. Means for transmitting and receiving, the relay station comprising: a first detecting means for receiving and detecting a battery-saving synchronization signal; and a device necessary for relaying the communication signal when the battery-saving synchronization signal is received. Power cutoff means for cutting off some power,
Second detection means for receiving and detecting a specific signal indicating a call connection transmitted from a relay station lower than the relay station or a slave station connected to the relay station, and operation of a power cutoff means when the specific signal is received Prohibiting means for prohibiting the power supply, and switching control means for controlling to selectively switch and set the time for turning off the power supply. The switching control means is a timer that operates when the specific signal is no longer received. A first timer means for determining a first shut-off time for shutting off the power supply, and when the time interval at which the specific signal can be received exceeds a predetermined time, the first timer means is longer than the first shut-off time. A second timer for determining a second shutoff time for shutting down the power supply for a long time; and a third timer for determining whether a time interval at which the specific signal can be received exceeds the predetermined time. Yes A wireless relay system.