JP2606169C - - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio selective call receiver having an intermittent reception function, and more particularly, to a synchronization state by receiving a synchronization signal included in a radio signal. The present invention relates to a radio selective calling receiver having an intermittent receiving function to be established. 2. Description of the Related Art Conventionally, such a radio selective call receiver (hereinafter, receiver) having an intermittent reception function has been used for the purpose of improving battery saving efficiency. [0003] Intermittent reception refers to on / off control of a radio unit. To improve battery saving efficiency, it is, of course, required to shorten the time for which the radio unit is turned on. . A receiver that establishes a synchronization state by receiving a synchronization signal included in a radio signal generally has two or more intermittent reception modes. That is,
The receiver is set after the power is turned on, receives a synchronization signal and establishes a synchronization state, and receives a predetermined batch including its own calling number, which is set to the synchronization state establishment mode and subsequently to the synchronization state establishment mode. And a batch reception mode. [0005] In a signal format of a radio signal applied to a receiver that establishes a synchronization state by receiving a synchronization signal, the synchronization signal is repeatedly transmitted at predetermined intervals. When the receiver receives the synchronization signal when the radio unit is turned on, the receiver can establish a synchronization state with the radio signal. When the receiver establishes the synchronization state, the receiver sets the above-described batch reception mode, and issues a call notification when detecting its own calling number. However, if the above-mentioned receiver is set to have a short radio section on time at the time of intermittent reception in order to improve the battery saving efficiency, the synchronization in the synchronization state establishment mode is reduced. The time required to receive a signal is increased. In the meantime, if the wireless base station transmits its own calling number, a problem arises that the receiver cannot receive its own calling number. On the other hand, if the radio section on time during intermittent reception is set to be long in order to immediately establish a synchronization state in the receiver, the above-mentioned battery saving efficiency cannot be naturally improved. It is an object of the present invention to provide a radio selective call receiver having an intermittent reception function capable of solving the above-mentioned problems, improving the battery saving efficiency, and establishing a synchronization state immediately when the power is turned on. It is in. [0009] In order to achieve the above-mentioned object, a receiver according to the present invention performs call notification by receiving its own call number, and improves the battery saving efficiency. If the receiver is intermittently received and the receiver cannot detect the synchronization signal, the on / off cycle of the receiver is shortened and at each cycle,
And a battery saving unit that sets the receiving unit ON time short and repeats each cycle a predetermined number of times . In the above-described configuration, the receiver of the present invention sets the radio section on time long when the power is turned on, so that the synchronization signal can be received immediately. When the synchronization signal is not detected, the receiver sets the radio section ON time short, so that the battery saving efficiency can be improved. Next, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of a receiver showing one embodiment of the present invention. In FIG. 1, an antenna 1 receives a radio signal from a radio base station (not shown). When a later-described battery saving signal is at a high level, the power of the radio unit 2 is controlled to be on, and the radio unit 2 demodulates and amplifies the radio signal received by the antenna 1 and outputs a demodulated signal. The waveform shaping unit 3 shapes the waveform of the demodulated signal into a digital signal readable by the decoder 5 and outputs a digital signal. The address memory 4 stores its own calling number, and
To output its own calling number. The decoder 5 detects a synchronization signal and a batch number to be described later from the digital signal, and outputs a synchronization detection signal. Also, the decoder 5
A coincidence between the calling signal included in the digital signal and the own calling signal is detected, and a coincidence signal is output. Further, the decoder 5 decodes a message signal included in the digital signal and outputs message information. The speaker drive section 6 current-amplifies the coincidence signal and outputs a speaker drive signal. The speaker 7 is driven by a speaker drive signal, and performs a call notification. The message controller 8 stores the message information output from the decoder 5 in the message memory 9 and reads the message information stored in the message memory 9 when a message reading switch (not shown) is operated. Further, the message control unit 8 corrects the error of the message information and outputs the message information to the display driving unit 10. The display drive unit 10 drives the message information output from the message control unit 8 after error correction so as to be displayed on the display unit 11, and the display unit 11 displays the message. The battery saving signal generator 12 establishes a synchronization state with a digital signal by inputting a synchronization detection signal. Further, the battery saving signal generating unit 12 outputs a battery saving signal for controlling the wireless unit 2 to be turned on / off at a timing described later until a synchronization state with the digital signal is established. On the other hand, after the synchronization state with the digital signal is established, the battery saving signal generation unit 12 controls the wireless unit 2 to turn on / off the radio unit 2 at the timing of receiving a predetermined batch including its own calling number. Is output. FIG. 2 is a block diagram illustrating details of the battery saving signal generator 12 shown in FIG. In the figure, an operation mode storage unit 18 stores three parameters and three modes relating to intermittent reception of the radio unit 2 in the synchronization state establishment mode. That is, the first parameter is the on-time of the radio unit 2, the second parameter is the off-time of the radio unit 2, and the third parameter is the number of continuations of the mode described later. 3
In the two modes, the above-described first, second, and third parameters are set to be different from each other. Here, the three modes and three parameters described above will be described in more detail with reference to FIG. In the figure, in the first mode, the ON time of the radio unit 2 is set to 30 seconds, and the OFF time is set to 1 minute. Further, if the operation of turning on and off the radio unit 2 once each is defined as one cycle, in the first mode, the continuation number of the cycle is set to two times. In the first mode, after turning on / off the two-cycle wireless unit 2 based on the above parameters, if no synchronization signal is detected,
A transition is made to the second mode in which the battery saving efficiency is higher than in the first mode. In the second mode, the radio unit 2 has an on time of 15 seconds and an off time of 45 seconds.
Seconds are set. In the second mode, the continuation number of the cycle is set to five times. In the third mode, the ON time of the wireless unit 2 is set to 3 seconds, and the OFF time is set to 30 seconds. In the third mode, the number of cycles is set to 10 times. Referring again to FIG. 2, the synchronization state holding unit 15 determines whether the receiver has received a synchronization signal, that is, the receiver sets either the synchronization state establishment mode or the batch reception mode. Memorize it. The operating mode data holding unit 18 holds three parameters of the mode currently set in the receiver among the three modes shown in FIG. The operation mode continuation counter 17 counts the number of times that the radio unit 2 is on / off controlled in the set mode, that is, the number of cycles in which the set mode is executed. The battery saving counter unit 14 is set and reset by the wireless unit control unit 13 described later, and measures the ON / OFF time of the wireless unit 2. When a power supply (not shown) is turned on, the radio unit control unit 14 causes the synchronization state holding unit 15 to store that the receiver is in the synchronization state establishment mode. The wireless unit control unit 14 reads the mode and the parameters stored in the operation mode data storage unit 18. When the receiver sets the synchronization state establishment mode, the radio unit control unit 14 causes the operating mode data holding unit 16 to store the mode and parameters shown in FIG. 3 that are currently set by the receiver. When the radio unit 2 is turned on and off once each time, the radio unit control unit 14 sets the operation mode duration time counter unit 1
The count of 7 is incremented by one. Upon receiving the synchronization detection signal, the wireless unit control unit 14 rewrites the synchronization state establishment mode stored in the synchronization state holding unit 15 to the batch reception mode. When the receiver sets the synchronization state establishment mode, the radio unit control unit 13 controls the battery saving so that the radio unit 2 is turned on / off based on the parameters held by the operating mode data holding unit 16. The counter section 14 is set. When the receiver sets the batch reception mode, the radio unit control unit 13 controls the radio unit 2 on and off based on the bit length from the synchronization signal to a predetermined batch including the calling number of the radio unit. Thus, the battery saving counter section 14 is set. The wireless controller 13 outputs a battery saving signal based on the count value of the battery saving counter 14. Next, the signal format of the radio signal used in this embodiment will be described with reference to FIG. In the figure, one sequence is composed of 15 batches. Batch 0 includes a preamble, a synchronization signal, a batch number, an address, and a message. The preamble is composed of 1 and 0 signals, and indicates the beginning of one sequence. The synchronization signal is a signal for establishing bit synchronization between the radio signal and the receiver. The batch number indicates the batch number of the currently transmitted signal, and is a signal for synchronizing the batch between the wireless signal and the receiver. The address is a call signal, followed by a message. Batches 1 to 15 include addresses and messages, but do not include preambles, synchronization signals, and batch numbers. The length of one sequence is 30 seconds. Next, the operation will be described. First, the outline of the present invention will be described with reference to the on / off timing charts of the radio section 2 shown in FIGS. In FIG. 5, when the receiver is turned on at time T1, that is, at the time of batch 12 of radio signals, the receiver turns on the radio unit 2 and starts reception. The receiver sets the synchronization state establishment mode and the first mode. The receiver operates at time T
The synchronization signal and the batch number are received by receiving the batch 0 in step 2, and the bit synchronization with the radio signal and the batch synchronization are performed. In the first mode, the on time of the wireless unit 2 is set to 30 seconds, and the length of one sequence is also 30 seconds. Therefore, when the receiving unit is turned on, the first on of the wireless unit 2 must be performed. A synchronization signal and a batch number can be detected, and a synchronization state can be established. Upon receiving the preamble, the synchronization signal, and the batch number, the receiver sets the batch reception mode from the synchronization state establishment mode, and turns off the radio unit at time T2. Subsequently, the receiver sets the time T
In step 3, the radio unit 2 is started up to receive the batch 3 including its own calling number. If batch 3 contains its own calling number, the receiver also receives the following message and turns off the radio at time T4. The receiver turns on the radio unit 2 at time T5 to resynchronize the bit synchronization and the batch, receives the batch 0, and turns off the radio unit at time T6. The receiver activates the radio unit 2 at time T7 to receive the batch 3 including its own calling number. At this time, the batch 3 does not include its own calling number, so that the receiver does not receive the message and turns off the wireless unit 2 at time T8. FIG. 6 shows the on / off timing of the radio unit 2 when the receiver is at a position where it cannot receive the radio signal from the base station. In the figure, when the receiver is turned on at time T9, the receiver
Turn on to start receiving. However, the receiver cannot receive the radio signal from the base station, and receives only noise. After the radio unit 2 is turned on, the receiver sets the synchronization state establishment mode and the first mode. Since the receiver cannot receive the synchronization signal and the batch number, the radio unit 2 is turned off at time T10, which is 30 seconds after time T9. When one minute elapses from time T10, the receiver turns on wireless unit 2 at time T11. The receiver is in the first mode described above,
The radio unit is turned on and off twice. Then, the receiver sets the second mode from the first mode, and turns on the radio unit at time T12. The receiver operates at time T12
The radio unit 2 is turned off at a time T13 after 15 seconds from the start of the process. When 30 seconds have elapsed from time T13, the receiver turns on the radio unit 2 at time T14. The receiver turns on and off the radio unit five times in the second mode described above. Thereafter, the receiver sets the second mode to the third mode, and turns on the radio unit at time T15. The receiver turns off the radio unit 2 at a time T16 three seconds after the time T15. The receiver is
When 30 seconds have elapsed from time T16, the wireless unit 2 is turned on at time T17. The receiver turns on and off the radio unit ten times in the third mode described above. Thereafter, the receiver sets the first mode again from the third mode, and thereafter continues the above-described operation until the synchronization signal and the batch number are detected. Next, the operation of the receiver will be described in more detail with reference to the flowcharts shown in FIGS. First, when the power is turned on (start), the radio control unit 13
The three parameters of the first mode are read from the operation mode data storage unit 18 and stored in the operation mode data holding unit 16. The wireless unit control unit 13 controls the battery saving counter unit 14 to turn on the receiving unit 2, that is,
Set to count 30 seconds. Further, the radio unit control unit 13 sets the operation mode duration time counting unit 17 to 1 and causes the synchronization state holding unit 15 to store that the receiver has set the synchronization state establishment mode (above S1). . The radio section control section 13 changes the battery saving signal to a high level simultaneously with the setting of the battery saving counter section 14, and controls the radio section 2 to be turned on (S2). When the radio unit 2 is turned on, the antenna 1 receives a radio signal from a radio base station (not shown), and the decoder 5 inputs a digital signal via the radio unit 2 and the waveform shaping unit 3. Upon detecting the synchronization signal and the batch number from the digital signal, the decoder 5 outputs a synchronization detection signal to the wireless unit control unit 13 (Yes in S3).
s). The radio section control section 13 changes the storage of the synchronization state holding section 15 from the synchronization state establishment mode to the batch reception mode in response to the input of the synchronization detection signal. Further, the radio unit control unit 13 sets the battery saving counter unit 14 to count the bit length of the synchronization signal and the predetermined batch including the calling number of the own unit (S8). The radio section control section 13 changes the battery saving signal to low level simultaneously with the setting of the battery saving counter section 14, and controls the radio section 2 to be turned off (S9). When detecting that the battery saving counter unit 14 has counted the bit length of the synchronization signal and the predetermined batch including the calling number of its own, the radio unit control unit 13 sets the battery saving signal to a high level. Then, the wireless unit 2 is turned on (S10). When the radio unit 2 is turned on, the decoder 5 inputs a digital signal via the antenna 1, the radio unit 2, and the waveform shaping unit 3. When detecting the coincidence between the calling signal included in the digital signal and the own calling signal, the decoder 5 outputs a coincidence signal to the speaker driving unit 6 (Yes in S11). The speaker drive unit 6 current-amplifies the coincidence signal, outputs a speaker drive signal, and the speaker 7 issues a call notification. Further, the message control unit 8 stores the message information output by the decoder 5, that is, a signal obtained by decoding the message signal in the message memory 9, corrects the error of the message information, and outputs the message information to the display driving unit 10. The display drive unit 10 drives the display unit 11 to display the error-corrected message information, and the display unit 11 displays the message (S12). By displaying the message, the receiver ends a series of operations (EN
D). On the other hand, in the case of No in S3, the radio unit control unit 13 sets the time for the battery saving counter unit 14 to turn on the receiving unit 2, that is, 30 seconds because the first mode is now set. Is detected, the operation mode continuation counter unit 17 detects that it has not counted up (S4).
In No). That is, the radio unit control unit 13 reads from the operating mode data holding unit 16 that the receiver has set the first mode and the mode continuation number at that time is two times, and sets the operation mode continuation time counter. The unit 17 detects that the count value is less than two. Further, the wireless section control section 13 increments the count value of the operation mode continuation counter section 17 by one (S5). In the case of Yes in S4, that is, when the radio unit control unit 13 detects that the operation mode continuation counter unit 17 is counting up,
The wireless unit control unit 13 reads the next mode, that is,
The second mode has been set if the first mode has been set, the first mode has been set if the second mode has been set, and the first mode has been set if the third mode has been set. 3
The two parameters are read out and stored in the operating mode data holding unit 16. Further, the radio unit control unit 13 sets the operation mode continuation counter unit 17 to 1 and sets the battery saving counter unit to the radio unit 2 off time stored in the operating mode data holding unit 16 (see above). S6). After the processing of S5 or S6, the radio section control section 13 changes the battery saving signal from the high level to the low level, and controls the radio section 2 to be turned off (S7). When the battery saving counter 14 counts up, the radio unit control unit 13 changes the battery saving signal from a low level to a high level, and controls the radio unit 2 to be turned on (S2). Thereafter, the receiver repeats the above operation. In this embodiment, the number of modes in the synchronization state establishment mode has been described as three. However, it is needless to say that the present invention does not limit the number of modes. In this embodiment, the signal format of the radio signal shown in FIG.
Although described as an example, it goes without saying that the present invention is applied to a general receiver that establishes a synchronization state by receiving a synchronization signal, and the present invention does not limit the signal format in any way. As described above, the receiver according to the present invention employs a configuration in which the intermittent reception operation timing of the receiver is varied when the synchronization state is established by receiving the synchronization signal. When the receiver is at a position where it can receive a radio signal from the base station, it can receive a synchronization signal at the first start-up of the radio unit and can establish a synchronization state. . When the receiver cannot receive the radio signal, the intermittent reception operation timing is varied so as to improve the battery saving efficiency and the radio section ON time is set to be short, so that the battery life is shortened. Can be extended.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a receiver showing one embodiment of the present invention. FIG. 2 is a block diagram illustrating details of a battery saving signal generator shown in FIG. 1; FIG. 3 is a table showing a relationship between modes and their parameters in a synchronization state establishment mode according to an embodiment of the present invention. FIG. 4 is a signal format of a wireless signal according to an embodiment of the present invention. FIG. 5 is a waveform chart (part 1) for explaining on / off timing of a radio unit according to an embodiment of the present invention. FIG. 6 is a waveform chart (part 2) for explaining the on / off timing of the radio unit according to the embodiment of the present invention. FIG. 7 is a flowchart (part 1) for explaining the operation of the receiver according to the embodiment of the present invention; FIG. 8 is a flowchart (part 2) for explaining the operation of the receiver according to the embodiment of the present invention. [Description of Signs] 1 Antenna 2 Radio section 3 Waveform shaping section 4 Address memory 5 Decoder 6 Speaker drive section 7 Speaker 8 Message control section 9 Message memory 10 Display drive section 11 Display section 12 Battery saving signal generation section 13 Radio section control section 14 Battery saving counter unit 15 Synchronization state holding unit 16 Operating mode data holding unit 17 Operation mode duration time counter unit 18 Operation mode data storage unit

Claims (1)

Claims: 1. A radio selective call receiver having an intermittent reception function of performing a call notification by receiving a self-call signal included in a radio signal from a base station and intermittently receiving a reception unit. In the case where synchronization cannot be established with respect to a digital signal included in the radio signal, the on / off cycle of the receiving unit is shortened, and reception in each cycle is reduced.
A radio selective call receiver having an intermittent reception function, characterized by comprising a battery saving means for setting a short section ON time and repeating each cycle a predetermined number of times . 2. The radio selective paging receiver having the intermittent reception function determines whether or not reception of the radio signal is possible by detecting a synchronization signal included in the radio signal. Wireless selective call receiver having an intermittent reception function. 3. A storage unit in which the battery saving unit stores a plurality of ON times of the wireless unit, a synchronization signal detection unit that detects the synchronization signal, and the synchronization signal detection unit does not detect a synchronization signal. 3. The radio selective call receiver having an intermittent reception function according to claim 2, further comprising: a radio control unit configured to set the radio unit on-time shorter based on the storage of the storage unit. 4. The storage unit stores a first wireless unit on-time longer than a cycle at which the synchronization signal is repeatedly transmitted, and a second wireless unit on-time shorter than the first wireless unit on-time.
4. The radio selective call receiver having an intermittent reception function according to claim 3, wherein the radio means ON time is stored. 5. An antenna that receives a radio signal, a radio unit that demodulates the radio signal received by the antenna, a synchronization detection unit that detects a synchronization signal included in the demodulated signal, and the synchronization detection unit when it is not possible to establish, O of the wireless unit
In addition to shortening the on / off cycle, the wireless section on time in each cycle is set short,
A wireless device comprising: a battery saving unit that repeats each cycle a predetermined number of times . 6. An antenna for receiving a radio signal, radio means for demodulating and amplifying the radio signal received by the antenna, waveform shaping means for shaping the output of the radio means and outputting a digital signal, Synchronization detection means for detecting a synchronization signal included in the digital signal; call number detection means for detecting its own call number included in the digital signal; call notification means for performing a call notification when the call number is detected And when the synchronization cannot be established , shorten the on / off cycle of the wireless means.
At the same time, the on-time of the wireless means in each cycle is set short, and each cycle is repeated a predetermined number of times.
A radio selective call receiver having an intermittent reception function, comprising: a battery saving means for returning . 7. The wireless unit on-time storage unit, wherein the battery saving unit stores a plurality of on-times of the wireless unit, and the wireless unit on-time storage, when the synchronization signal detection unit does not detect a synchronization signal. 7. The radio selective call receiver having an intermittent reception function according to claim 6, further comprising: a radio control unit configured to set the radio unit on-time to be short based on the memory of the unit. 8. The radio unit on-time storage unit stores a first radio unit on-time longer than a cycle at which the synchronization signal is repeatedly transmitted and a second radio unit shorter than the first radio unit on-time. 8. The radio selective call receiver having an intermittent reception function according to claim 7, wherein the on-time is stored. 9. A synchronization state storage unit for storing whether or not the battery saving unit has detected the synchronization signal, and a wireless unit on-time stored in the wireless unit on-time storage unit, wherein a current setting of the wireless unit on-time is stored. 9. An operating time holding unit for holding the on-time of the wireless unit, and a battery saving counter unit for counting the on-time of the wireless unit held by the operating time holding unit. Radio selective call receiver with intermittent reception function. 10. The radio unit on-time storage unit stores an upper limit number of times that the radio unit is controlled to be turned on during the first and second radio unit on-times, and the radio control unit stores When the state storage unit stores that the synchronization signal is not detected, the wireless unit is stored in the wireless unit on-time storage unit by the on-time held by the operation time storage unit. It detects whether or not it is turned on only the upper limit number of times, and further detects that the synchronization signal is not detected, the radio unit on time held by the operating time holding unit, the radio unit on time It is characterized in that it is rewritten so as to be shorter on the basis of the wireless unit on-time stored in the storage unit, and thereafter the wireless unit is controlled to be on based on the wireless unit on-time held by the operating time holding unit. The radio selective call receiver having an intermittent reception function according to claim 9. 11. A first step of demodulating a radio signal from a base station, a second step of detecting a synchronization signal from the demodulated signal, and a radio station for demodulating the radio signal when synchronization cannot be established. Section on / off cycle
A third step of shortening the radio unit ON time and repeating each cycle a predetermined number of times in a radio selective call receiver having an intermittent reception function. 12. The fourth step of detecting whether the wireless unit has been turned on for a predetermined number of times during the currently set wireless unit on-time, and the wireless unit currently set 12. The intermittent operation according to claim 11 , further comprising the step of: setting the radio unit ON time short when the unit ON time is turned ON the predetermined number of times and the synchronization signal is not detected. A battery saving method for a radio selective calling receiver having a receiving function. 13. The radio selective calling receiver having the intermittent receiving function, further comprising a battery saving means for setting a short time of the wireless means when the short time of the wireless means is set. Item 1. A radio selective call receiver having an intermittent reception function according to Item 1. 14. The battery saving switching means for setting the first wireless means ON time when the currently set wireless means ON time is turned ON a predetermined number of times and the synchronization signal is not detected. 5. The radio selective call receiver having an intermittent reception function according to claim 4, wherein: 15. The battery saving switching means for setting the first wireless means on-time when the currently set wireless means on-time is turned on a predetermined number of times and the synchronization signal is not detected. 9. The radio selective call receiver having an intermittent reception function according to claim 8, wherein: