JPH0279526A - Intermittent reception system - Google Patents

Abstract

PURPOSE:To reduce the average power consumption at the standby state of a call by decoding a head area of an incoming signal at first and stopping the power supply to a circuit receiving the incoming signal of a radio terminal equipment when the call signal is not addressed to its own station. CONSTITUTION:A power is fed to a receiver 6 and an incoming signal processing circuit 7 in the reception timing and an incoming communication channel is inputted from the receiver to the incoming signal processing circuit 7. The incoming signal processing circuit 7 collates bits of the incoming signal sequentially and when the incoming signal pattern to its own station differs, the power feeding to the receiver 6 and the incoming signal processing circuit 7 is stopped. Thus, the average power consumption at the standby of the incoming call of the terminal equipment is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a wireless terminal 51 (hereinafter also simply referred to as a "terminal device") that receives an incoming signal on a communication line and transmits the signal to a wireless central controller ( In a wireless communication system in which a terminal device (hereinafter also simply referred to as a "central control unit") waits for an incoming call to its own station, the incoming call standby of a terminal device relates to an intermittent reception method that reduces average power consumption.

[Prior Art] Part 1 FIG. 12 is a diagram showing the configuration of a general wireless communication system consisting of a wireless central controller and a plurality of wireless terminal devices.

Reference numeral 51 represents a wireless central control device, and 52a to 52c represent wireless terminal devices.

As shown in FIG. 12, there are a plurality of terminal devices under the control of a central control device, and they are connected to a fixed network or other network.
When transmitting an incoming signal from a terminal device, it is effective to time-divide the incoming communication line and sequentially transmit a plurality of incoming signals.

FIG. 13(a) is a diagram showing an example of an incoming communication line in the case where one communication line is exclusively used for transmitting an incoming signal from a central control unit to a terminal device in the prior art. It is time-divided into time slots in which signals 53a-53c are transmitted.

FIG. 15 shows an example of a prior art incoming signal configuration.

One incoming signal is divided into a plurality of areas 55a to 55d, 55a is a preamble area, 55b is a start pattern area, 55c is a control information area, and 55d is a main information area. The number of bits in each area depends on the system conditions. You can choose.

The preamble area 55m is a signal given to the terminal device to achieve bit synchronization when the central control device transmits a signal in a burst manner, and can be omitted when the signal is transmitted continuously.

The start pattern area 55b indicates that the signal is for the previous MES, and is a signal given by the receiving side to synchronize the 7th frame.

The control information area 55c includes information indicating the source of the incoming signal, a check hood, and the like.

The main information area 55d contains information regarding the destination terminal device and a check code.

Conventionally, a terminal device receives and decodes incoming information up to the main information area, and determines whether or not its own station corresponds to the incoming information.

FIG. 13(b) is a diagram showing the operating state of the receiving circuit of the terminal device corresponding to the incoming signal shown in FIG. 13(a).

Incoming call waiting sometimes corresponds to an incoming call to the own station, in which the wireless terminal device receives the incoming signal to the end as described above and determines whether the incoming signal corresponds to an incoming call to the own station or not. If so, proceed to the incoming call processing operation, and if not, receive the next incoming signal. In this case, as shown in FIG. 13(b), the receiving circuit of the terminal device always operates to wait for incoming calls.

Further, the above technique is similarly applied to a method in which a specific communication line is not installed for transmitting an incoming signal, and an idle communication line that is not being used at the time is used.

Rice-I part 2゜ Another implementation example according to the prior art is shown in FIG.

FIG. 14(a) is a diagram showing a conventional incoming communication line.
The incoming signal is time-divided into time slots indicated by 4a to 54e.

The difference from conventional technology 1 is that terminal devices are divided into m types of groups, time slots in the incoming communication line are assigned to each group, and incoming signals are transmitted at the timing assigned to each group. It is a point.

FIG. 14(b) shows the operating state of the terminal device receiving circuit at this time. The terminal devices are divided into m types of groups, receive only the time slots in which the incoming signal for their own group is received, and, as in conventional technology 1, determine whether the incoming signal corresponds to the incoming call to their own station or not. Let's do it.

In this case, as shown in FIG. 3(b), the terminal device receiving circuit operates at all times during the time slot when the incoming call signal is received for the own group.

[Problem to be solved by the invention]

With conventional technology! As shown in Fig. m13 (b) and Fig. 14 (b), at the timing when there is a possibility that an incoming signal to the own station is received, regardless of whether or not there is an incoming call to the own station,
The receiving circuit was constantly operating to receive the entire incoming signal.

This has the disadvantage of consuming unnecessary power and unnecessarily shortening the battery life of the device.

SUMMARY OF THE INVENTION An object of the present invention is to provide an intermittent reception method that solves the above-mentioned drawbacks and reduces the average power consumption when waiting for an incoming call.

[Means to solve the problem]

According to the invention, the above objects are achieved by the means specified in the claims.

That is, the present invention configures a service area in a wireless zone, a wireless central controller and a wireless terminal device communicate using a wireless communication line, and the wireless central controller communicates with the wireless terminal device via the communication line. In a communication method in which an incoming signal including a terminal identification signal is transmitted, and the wireless terminal device receives the communication line through which the incoming signal is transmitted and waits for the incoming call to its own station, the wireless terminal device identifies the received incoming signal. Each received bit is sequentially compared with the bit pattern of the incoming signal to the own station, and when it is detected that the pattern is different from the incoming signal pattern to the own station, the circuit for receiving the incoming signal in the wireless terminal device is sent to the circuit that receives the incoming signal. or, if the incoming signal sent from the wireless central controller to the wireless terminal device is error correction coded, the wireless terminal device will and the bit pattern of the incoming signal to the own station, and when it is detected that the number of bits different from the incoming signal pattern to the own station exceeds the number of correctable errors, Either stop the power supply to the circuit that receives the incoming signal, or identify part or all of the terminal subscriber number included in the incoming signal, the identification code that groups the terminal subscriber number, or the terminal subscriber type. A code for distinguishing between a significant incoming signal and an invalid incoming signal with no incoming call is added to the leading area of the incoming signal, and the wireless terminal device first reads the leading area of the incoming signal. This is an intermittent reception method in which the power supply to the circuit for receiving the incoming signal in the 1#l terminal device is stopped if the signal is decoded and the incoming signal is not for the local station.

[For production]

FIG. 2 shows diagrams for explaining the present invention in detail; FIG. 2(a) shows the signal configuration of the incoming communication line, and FIG.
) is a diagram showing the operating state of a conventional terminal device receiving circuit, and (e) of the same figure is a diagram showing the operating state of the terminal device receiving circuit of the present invention.

When an incoming signal is being transmitted as shown in FIG. 2(a), the terminal device receives the incoming signals at the timing when the incoming signals 38 to 30 are transmitted as shown in FIG. 2(b) and (c).

Even if the incoming signal is not for your station,
In the conventional technology shown in Figure (b), all time slots of incoming signals 3&~3C are received, but in the case of the present invention shown in Figure (e), at the point when it is determined that the call is not for the own station (in the figure, ta -tc) to stop the reception operation. As a result, as shown in Figure (e), the reception time rate of the terminal device when it is in standby for incoming calls is reduced, and the average power consumption is reduced.

〔Example〕

FIG. 1 shows a wireless central control system to which the present invention is applied! 1Cr1
1 is a diagram showing the configuration of a wireless communication system consisting of a wireless terminal device 1 and a plurality of wireless terminal devices, in which 1 represents a wireless central control device, 1a represents a wireless zone, and 2a to 2C represent wireless terminal devices.

The configuration of the wireless communication system shown in this figure is the same as the configuration of the wireless communication system explained in FIG. 12, except for the parts directly related to the present invention, and the explanation thereof will be omitted.

Each embodiment of the present invention will be described below.

``Large'' ``Gar±no and Y-'' This embodiment corresponds to claim 1 of the claims.

FIG. 3(a) is a diagram showing an example of the configuration of a communication line for incoming signals.
3c.

FIG. 5(a) shows an example of the configuration of an incoming signal according to the present invention. Similar to the prior art (explained in FIG. 15), the incoming signal has multiple areas 5.
Divided into a to 5d, 5a is a preamble area, 5b is a start pattern area, 5C is a control information area,
5d represents the main information area.

FIG. 5(b) is a diagram showing the operating state of the receiving circuit of the terminal device corresponding to the incoming signal shown in FIG. 5(a).

The wireless terminal device sequentially compares each received bit of the incoming signal it is receiving with the bit pattern of the incoming signal to its own station, and
At the time when it is detected that the incoming signal pattern is different from the incoming signal pattern to the own station (time point indicated by to in the figure), the power supply to the circuit for receiving the incoming signal in the terminal device is stopped.

The viG diagram shows a block diagram explaining the operation of the above terminal *a, where 6 is a receiving device, 7 is an incoming signal processing circuit, 8 is an incoming response processing circuit, 9 is a power supply device, and 10 is a reception timing control. 11 represents a circuit, 12 represents a transmitter.

In the terminal device shown in the figure, the receiving device! 6. The reception timing control circuit 10 controls the timing of power supply from the power supply device 9 to the incoming signal processing circuit 7. A clock 11 is supplied to the reception timing control circuit 10 . Receive when the reception timing arrives! [16, Power is supplied to the incoming signal processing circuit 7, and the incoming communication channel is received!
The signal is input from the I station 6 to the incoming signal processing circuit 7.

The incoming signal processing circuit 7 stores the bit pattern of the incoming signal to its own station, and sequentially compares this bit pattern with each bit of the incoming signal being input, and determines whether the incoming signal pattern is different from the incoming signal pattern to its own station. If it is detected that the call is not incoming to its own station, it is transmitted to the reception timing control circuit 10, and the power supply to the receiving device 6 and the incoming signal processing circuit 7 is stopped. If the incoming signal corresponds to an incoming signal to the own station, it is transmitted to the incoming call response processing circuit 8. Power is supplied from the power supply device 9 to the receiving device 6, the incoming signal processing circuit 7, the transmitting device, and various other circuits within the terminal device. It is also possible to substitute software for these circuit configurations.

FIG. 7 shows the control flow for waiting for incoming calls on the terminal device described above.

Fire IF) 2- This embodiment is an embodiment corresponding to claim 2 of the claims.

In the first embodiment, an example is shown in which the incoming signal is not encoded with m9 correction coding, but the intermittent reception method according to the present invention is also applied when the incoming signal is subjected to error correction coding. In this case, in the block diagram of diagram m6, the incoming signal processing circuit 7
has a counting function, which sequentially compares the bit pattern of the incoming signal to its own station with each bit of the incoming signal being input, and counts the number of bits that are different from the incoming signal pattern to its own station. When it is detected that the number of errors exceeds the number of correctable errors, the reception timing control circuit 10 is informed that the call is not incoming to the local station, and the power supply to the receiving device 6 and the incoming signal processing circuit 7 is stopped.

FIG. 8 shows the control flow for waiting for incoming calls on the terminal device described above.

This embodiment corresponds to claim 3 of the claims.

The same technology as in Example 1 can be applied to an intermittent reception method that stops power supply to the circuit that receives the incoming signal if it is not the incoming signal to the local station when the leading area of the incoming signal is received. It is. At this time, in FIG. 5(a), the start pattern area 5b is changed depending on the destination terminal number or terminal type. The main information area 5d transmits the remaining information indicating the destination terminal.

Also, if it is an invalid incoming signal instead of a valid incoming signal,
Information indicating that the pattern is invalid is transmitted in the start pattern area 5b.

The start pattern can be determined to have strong autocorrelation characteristics, and examples of four types of start patterns (16 bits) are shown in FIGS. 10(a) to 10(d).

When waiting for an incoming call, the wireless terminal device receives an incoming signal up to the start pattern area 5b and determines whether the incoming signal corresponds to an incoming call to its own station. At this point, if it is determined that this does not apply, the reception operation is stopped. If there is a possibility that this is the case, the main information area 5d is received, and it is determined whether the incoming signal corresponds to the incoming call to the own station.

FIG. 3(b) shows the operating state of the terminal device receiving circuit.
For the incoming call signals shown in a and 3b, if it is determined that the incoming call does not apply to the own station at the time when the start pattern area 5b is received, the receiving operation is stopped.
For the incoming signal shown by 3c), the case where up to the main information area is received is shown.

FIG. 9 shows the control flow of the above terminal device waiting for incoming calls.

``dog'' ``masu'' 7) 4- Further examples of the present invention are shown below.

FIG. 4 (a) is a diagram showing an example of the configuration of an incoming communication line, which is time-divided into time slots for transmitting incoming signals 48 to 4e. The difference from Embodiment 3 is that the terminal devices are divided into m types of groups, time slots in the incoming communication line are assigned to each group, and the incoming signal is transmitted at the timing assigned to each group. It is.

FIG. 4(b) shows the operating state of the terminal device receiving circuit.
For the incoming call signal shown in a, it is determined that the incoming call does not apply to the own station at the time the start pattern area is received, and for the incoming call signal shown in 4e, the main information area has been received. Indicate the case.

The terminals VtW1 are divided into m types of groups, and as shown in FIG.
.

The control 70- for waiting for incoming calls on the terminal device is the same as in the third embodiment! #9 Shown in Figure.

〔Effect of the invention〕

As explained above, according to the present invention, when a terminal device determines that the incoming signal it receives is a signal that does not correspond to its own station when it receives a start pattern area, the terminal device waits for incoming calls. By stopping reception in the subsequent areas, the average power consumption when the terminal device is waiting for an incoming call can be reduced.

An example of the effect of the invention is shown in FIG.

FIG. 11 is an example where terminal devices are divided into eight groups,
The destination terminal is identified in the start pattern area using eight types of start patterns (in the start pattern area, the terminal determines that an average of 87.5% of incoming signals are unrelated to its own station), and the preamble area and start pattern area are Assume that it accounts for 5% of the total incoming signal.

The average incoming call rate for one terminal device is [2 times 7 days/terminal], the horizontal axis is the volume of incoming signals (1 erl when all incoming signals are valid), and the vertical axis is the time when the terminal device is waiting for incoming calls. Indicates average power consumption (relative value).

However, the power consumption during reception is assumed to be 1, and the power consumption when power supply to the receiving device and incoming signal processing circuit is stopped is 0.
It was set as 2.

The conventional method is shown as a data straight line #[13], and the result according to the present invention is shown as a data straight line 14.

From the results shown in this figure, it can be seen that the effects of the present invention are large.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of a wireless system consisting of a wireless central controller and a plurality of wireless terminal devices to which the present invention is applied, and FIG. 2 is a diagram for explaining the present invention in detail.
Figure a) shows the signal configuration of the incoming communication line;
) is a diagram showing the operating state of a conventional terminal device receiving circuit, FIG. A diagram showing an example of the signal configuration of the incoming communication line of the invention, FIG. 3(b) is a diagram showing the operating state of the terminal device corresponding to the incoming signal shown in FIG. 3(a), #S4(a) is m the terminal device
A diagram showing an example of the signal configuration of the incoming communication line of the present invention when divided into groups, FIG. 4(b) is a diagram showing the operating state of the terminal device corresponding to the incoming signal shown in FIG. 4(a), Figure 5(a)
5(b) is a diagram showing an operating state of a terminal device corresponding to the incoming signal shown in FIG. 5(a), and FIG. 6 is a diagram showing an example of the incoming signal configuration of the present invention. The configuration block diagram of the terminal device, FIG. 7 is a 70-chart for explaining the operation of the first embodiment of the present invention, and FIG. 8 is the second embodiment of the present invention.
Figure 9 is a 70-chart for explaining the operation of the third and fourth embodiments of the present invention, and Figures 10 (a) to (d) are four types of charts. FIG. 11 is a diagram showing an example of a start pattern (16 bits), and FIG. 11 is a diagram showing a characteristic of "incoming call volume - hourly average power consumption for terminal device standby" for detailed explanation of the present invention. FIGS. A diagram showing the configuration of a general wireless communication system consisting of a wireless central controller and a plurality of wireless terminal devices, and FIG. 13(a) is an example of a signal configuration of a conventional incoming communication line when wireless terminal devices are not grouped. Figure #113 (, b) shows Figure 13 (
FIG. 14(a) shows an example of the signal configuration of the incoming communication line of the prior art when the terminal devices are divided into m groups. 14(b) is a diagram showing the operating state of the conventional terminal device corresponding to the signal shown in FIG. 14(a), flS15
The figure is a diagram showing an example of the structure of an incoming signal according to the prior art. 1... Radio central control unit, 1a ・
・・１．・Wireless zone, 2a-2c...
・Wireless terminal device, 3a to 3a, 4m=4
e...Incoming signal, 5a...
...Preamble area, 5b...
Start pattern area, 5c... Control information area, 5d... Main information area,
6...Receiving device, 7...Incoming call information processing circuit, 8...Incoming call response processing circuit, 9......Power supply device,
10... Reception timing control circuit, 11 ・
・・・・・・ Clock, 12 ・・・・・・Transmission device, 13, 14 ・・・・・・ [Incoming call volume - terminal device standby is hourly average power consumption] Characteristic agent Patent attorney Takashi Motoyami 7 Figure 6 Figure 7 Figure (a) 10010011001 fOflO 1st
0 Figure 11 Figure 12 Figure 1! I! Figure 113Figure μFigure 15

Claims (1)

[Claims] 1. A wireless zone constitutes a service area, a wireless central controller and a wireless terminal device communicate using a wireless communication line, and the wireless central controller communicates with the wireless terminal device via the communication line. In a communication method, a wireless terminal device transmits an incoming signal including a terminal identification signal to a destination, and the wireless terminal device receives the communication line through which the incoming signal is transmitted and waits for an incoming call to its own station. Each received bit of the signal is sequentially compared with the bit pattern of the incoming signal to the own station, and when it is detected that the pattern is different from the incoming signal pattern to the own station, the incoming signal is received in the wireless terminal device. An intermittent reception method characterized by stopping power supply to the circuit. 2. A wireless zone constitutes a service area, a wireless central controller and a wireless terminal device communicate using a wireless communication line, and the wireless central controller receives an incoming call containing a terminal identification signal addressed to the wireless terminal device via the communication line. In a communication system in which a signal is transmitted, the incoming signal is encoded with error correction coding, and the wireless terminal device receives the communication line through which the incoming signal is transmitted and waits for the incoming call to its own station, the wireless terminal device receives the incoming signal. The time when each received bit of the incoming signal received by the station is compared with the bit pattern of the incoming signal to the own station, and it is detected that the number of bits that differ from the incoming signal pattern to the own station exceeds the number of correctable errors mentioned above. An intermittent reception method characterized in that power supply to a circuit for receiving an incoming signal in the wireless terminal device is stopped. 3. A service area is configured in a wireless zone, a wireless central controller and a wireless terminal device communicate using a wireless communication line, and the wireless central controller sends a terminal identification signal to the wireless terminal device via the communication line. In a communication method in which a wireless terminal device receives a communication line through which the above-mentioned incoming signal is transmitted and waits for an incoming call to its own station, a part or all of the terminal subscriber number included in the incoming signal, A combination of one or more of identification codes for grouping terminal subscriber numbers, codes for identifying terminal subscriber types, and codes for distinguishing between significant incoming signals and invalid incoming signals with no incoming calls is added to the leading area of the incoming signal. The wireless terminal device first decodes the leading region of the incoming signal, and if the incoming signal is not for its own station, stops power supply to the circuit in the wireless terminal device that receives the incoming signal. An intermittent reception method characterized by: