JPH11341534A - Radio calling receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio calling receiver that voids reception of information whose reception has been finished without any error even when the information is received repetitively so as to prevent useless power consumption resulting from the reception of unnecessary information. SOLUTION: In this radio calling receiver, an end state discrimination means 15 that discriminates a reception end state (completion state) for each sub frame writes 'completed' to an end state storage section 16 for the completion state of information of the sub frames when no error is in existence in the information of the received sub frames and a reception operation control means 18 controls a demodulation section 11 so as not to receive sub frames corresponding to the information whose completion state in the end state storage section 16 indicates 'completed' at next reception.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio paging receiver, and particularly to a radio paging receiver capable of reducing unnecessary power consumption by preventing unnecessary reception operation when the same information is transmitted a plurality of times. It relates to a call receiver.

[0002]

2. Description of the Related Art First, a receiving operation of a radio pager will be described with reference to FIG. FIG. 8 is an explanatory diagram showing the receiving operation of the synchronization signal and the paging receiver. The synchronization signal received by the receiver includes a synchronization signal 1 (S1) transmitted at a certain interval and a synchronization signal 2 transmitted following S1.
(S2). The synchronization signals 1 (S1) all have the same information, and the synchronization signal 2 (S2) has a series of numbers that are repeated at a constant period (eg, 0,
1,2,3,4,5,0,1,2,3,4,5,0,
1,…).

[0003] A single or a plurality of synchronization signals 2 (S2) are assigned to the paging receiver, and as shown in FIG. 8 (a), coincide with its own synchronization signal for battery saving. Only the part is received, and the other parts are not received.

[0004] When transmitting information to a specific paging receiver, the transmitting side follows the synchronizing signal of the paging receiver and adds address information (A) unique to the paging receiver.
D) and message information (MS) to be notified,
As shown in FIG. 8 (b), the paging receiver includes S1, S
After step 2, AD and MS are received.

[0005] The information is transmitted within a fixed time (own frame) from the synchronization signal 1 to the next synchronization signal 1, but when the amount of information is large, the information may be transmitted in a plurality of times. . As shown in FIG. 8 (c), the configuration in the own frame includes a synchronization signal 1 (S1), a synchronization signal 2 (S2), address information (AD), message information (MS), and the like.

[0006] Address information and message information are divided and transmitted in word units according to the amount of information. Each word includes data (check data) for detecting the presence / absence of an error. Upon receiving the data, the paging receiver performs error detection and correction based on the check data.

In transmitting information to a radio pager, the same information is repeatedly transmitted to more accurately transmit the information. Here, the receiving operation of the paging receiver when repeatedly performing transmission will be described with reference to FIG. FIG. 9 is an explanatory diagram showing a receiving operation in a conventional paging receiver when repeated transmission is performed.

As shown in FIG. 9, in the conventional paging receiver, when the address information (AD1) unique to the receiver by the first transmission is detected in the own frame, the message information (MS1) following AD1 is read. Then, it is stored in the storage unit inside the radio pager.

Then, the radio call receiver checks the check data of the stored message information (MS1),
If there is no error in the received information, a ringing sound or light is emitted to perform a calling operation for notifying the reception.

[0010] If there is an error in the received information, the radio paging receiver does not perform the paging operation, receives the next self-frame, and receives the address information (AD2) unique to the receiver.
The message information (MS2) subsequent to the above is received, compared with the previously received message in the storage unit, selected, and a message assembling operation for assembling a message with less errors is performed.

Here, a frame configuration at the time of repeated transmission will be briefly described with reference to FIG. FIG. 10 is an explanatory diagram showing a frame configuration at the time of repeated transmission. When the transmitting side repeatedly performs transmission, the address information and the message information are transmitted by shifting the position (sub-frame) in the frame for each repetition transmission count.

As shown in FIG. 10, in the first transmission,
Address information (AD1) and message information (MS1)
Are transmitted in the first subframe, and in the second transmission, the address information (AD2) and the message information (MS2) are transmitted in the second subframe. AD1 and AD
2 is the same data, and MS1 and MS2 are the same data.

[0013] Therefore, in the radio pager, it is possible to know the number of transmission data from the position (subframe) where the address information of the received signal is detected.

Specifically, the first sub-frame is the first transmission data, the second sub-frame is the second transmission data,
The n-th subframe is the data of the n-th transmission. In a system that performs n-times repetitive transmission, the own frame includes data from the first transmission data to the n-th transmission data.

[0015]

However, in the conventional paging receiver, all the subframes in the own frame are received, so that the information of the first subframe at the time of the first transmission contains an error. If the message assembling operation is completed by receiving the first subframe without including the second subframe, the second subframe at the time of the second transmission, which is the same information, is also received. As described above, there is a problem in that useless power is consumed by performing the operation of receiving unnecessary parts.

The present invention has been made in view of the above-mentioned circumstances, and for information that has been received without error, the receiving operation is not performed even if it is repeatedly transmitted, so that unnecessary power due to reception of an unnecessary portion is prevented. It is an object of the present invention to provide a radio call receiver capable of preventing consumption.

[0017]

According to a first aspect of the present invention, there is provided a radio paging receiver in which a plurality of frames including a plurality of subframes containing information are transmitted. In a state where subframes containing the same content of information are transmitted in a plurality of consecutive frames, it is determined whether or not there is an error for each subframe, and if there is no error in the information of the subframe, It is characterized by not receiving subframes containing the information to be transmitted. Information that has been correctly received once is prevented from being received even if it is repeatedly transmitted, preventing useless reception operation and reducing power consumption. can do.

According to a second aspect of the present invention for solving the problems of the above conventional example, a plurality of frames composed of a plurality of subframes including information are transmitted, and a plurality of consecutive subframes including information of the same content are successively transmitted. In the radio paging receiver used in the state of being transmitted in the frame of, the demodulation unit for receiving and demodulating the radio signal, and whether or not the reception of the sub-frame is completed based on the presence or absence of an error of the received sub-frame And a receiving operation control means for controlling a receiving operation of a next frame in the demodulation section based on a result of the completion state determination by the completion state determining means. When there is no error in the received sub-frame, the determining unit determines that the information of the sub-frame is completed as “completed”, and If there is an error in the frame,
Completion state determination means for determining the completion state of the information of the sub-frame is "incomplete", the reception operation control means,
When the next frame is transmitted, the demodulation unit controls the demodulation unit so as not to receive the subframe including the information that the determination result is “completed”, and the subframe including the information that the determination result is “incomplete” is transmitted. It is characterized by being a receiving operation control means for controlling the demodulation unit to receive,
For information that has been correctly received once, it is prevented from being received even if it is repeatedly transmitted, preventing unnecessary reception operation,
Power consumption can be reduced.

[0019]

Embodiments of the present invention will be described with reference to the drawings. The radio paging receiver (the present apparatus) according to the embodiment of the present invention detects an error in received information in units of subframes. The power consumption is reduced by not performing the receiving operation from time to time.

Before describing the configuration of a radio pager (this apparatus) according to an embodiment of the present invention, first, an outline of a receiving operation which is a feature of this apparatus will be described with reference to FIGS. . 1 and 2 show a receiving operation of the paging receiver according to the embodiment of the present invention. FIG. 1 is an explanatory diagram of a case where the first transmission succeeds in receiving without errors. FIG.
FIG. 9 is an explanatory diagram of a case where an error is received during the first transmission. Here, for simplicity of explanation, a system for repeatedly transmitting the same information twice will be described as an example. Note that SF (n: m) indicates a subframe that can be received without error, and sf (n: m) indicates a subframe in which an error has occurred. Further, n is the serial number of the transmitted subframe (information), and m indicates the number of the subframe in the frame.

FIG. 1A shows the first reception information and the reception operation, and FIG. 1B shows the second reception information and the reception operation. As shown in FIG. 1A, the present apparatus receives a self-frame (frame) composed of a first sub-frame and a second sub-frame following the synchronization signals s1 and s2, but here, it is transmitted for the first time. The first subframe (S
Focus on the information of F (1: 1)). The second subframe (SF (0: 2)) is the information of the second transmission.

As shown in (a), the information of the first subframe (SF (1: 1)) is correctly received by the first reception. At the time of the second reception shown in (b), this information is stored in the second subframe (SF (1: 2)).
However, as a feature of the present apparatus, a receiving operation is not performed at the time of the second reception for a subframe that has been correctly received at the first time. As described above, the present apparatus does not perform useless receiving operation,
This is to reduce power consumption.

As shown in FIG. 2A, when the information of the first subframe (sf (1: 1)) is received with an error, as shown in FIG. As well as 2
The second subframe (SF (1: 2)) at the time of the second reception is received.

Next, the receiving operation of the present apparatus in a system that performs three repetitive transmissions will be described with reference to FIG. FIG. 3 is an explanatory diagram illustrating an example of a reception operation of the present device in a system that performs transmission three times repeatedly.

As shown in FIG. 3A, at the time of receiving the first self-frame (when focusing on the information of the first sub-frame), the first transmission of the first sub-frame (SF (1:
1)) and the third third subframe (SF (−1:
3)) was successfully received without error, but the second subframe (sf (0: 2)) of the second transmission was received with an error.

Then, as shown in FIG. 3B, at the time of the second self-frame reception, the second sub-frame (SF (1: 2)) including the information correctly received at the first reception
, The receiving operation is not performed, and the receiving operation is performed for the third subframe (SF (0: 3)) including the information having an error during the first reception. At the time of the second reception, the information of the first subframe (sf (2: 1)) is received with an error.

Then, as shown in FIG. 3C, at the time of the third self-frame reception, the first sub-frame (sf (3: 1)) transmitted for the first time and the first sub-frame (sf (3: 1)) at the time of the second reception which have an error. Two subframes (SF (2: 2)) are received, and the reception operation is not performed for the third subframe that has already been received in the first reception. Thus, the receiving operation of the present apparatus is performed. It should be noted that “no error” indicates the presence or absence of an error as a result of error correction using a check bit.

Next, a configuration of a radio pager according to an embodiment of the present invention for realizing the above-described operation will be described with reference to FIG. FIG. 4 is a block diagram showing a configuration of the radio pager (this apparatus) according to the embodiment of the present invention.
As shown in FIG. 4, the apparatus includes a demodulation unit 11 for receiving and demodulating a radio signal, a temporary storage unit 12 for temporarily storing received data, a word data storage unit 13 for storing more accurate received data, Temporary storage unit 12 and word data storage unit 1
Word error comparing means 14 for comparing the error information of No. 3
A completion state determination unit 15 for determining a reception completion state for each subframe; a completion state storage unit 16 for storing data of a completion state for each subframe; and a word data storage unit 1
3 and a position updating unit 17 for updating the position of the data in the completion state storage unit 16, and a reception operation control unit 18 for controlling the reception operation based on the data in the completion state storage unit 16.

Next, each component of the present apparatus will be specifically described. The demodulation unit 11 is provided with an antenna and demodulates a received signal in the same manner as in the prior art. Upon receiving the (control signal), the receiving operation is performed in subframe units within the own frame. The operation of the control signal output will be described later in detail.

The temporary storage unit 12 stores the received data (usually composed of a plurality of words) transmitted from the demodulation unit 11.
And error data in word units.
An area for storing received data and error data is provided for each subframe. That is, in the case of a system that transmits n times, an area for storing data of n subframes in word units is provided. The received data includes the address information and the message information as described above.

The word data storage unit 13 stores the temporary storage unit 1
The configuration is the same as that of No. 2 and stores data having the least error among the pieces of information of the same content received in the past in units of subframes.

The word error comparing means 14 compares the information in the temporary storage section 12 with the information in the word data storage section 13 and stores more accurate information in the word data storage section 13.

More specifically, the word error comparing means 14
Compares the error data in the temporary storage unit 12 and the word data storage unit 13 in word units. If the number of error bits in the temporary storage unit 12 is smaller than the word data storage unit 13, The subframe data to be updated is updated with the data in the temporary storage unit 12.

The completion state judging means 15 judges the reception completion state for each subframe. Specifically, the information in the word data storage section 13 is read for each subframe, and the subframe (Word error), that is, whether all the words in the subframe are correctly received, determine the reception completion state based on the result, and store the determination result for each subframe in the completion state This is stored in the unit 16.

If there is at least one error in the sub-frame of the word data storage unit 13, there is a possibility that more accurate information may be obtained in the next reception. Subframe reception status is "incomplete"
Is written in the completion state storage unit 16.

If there is no error, that is, if all the words in the subframe have been correctly received, the next reception is not necessary, and it is determined that the information has been received. Write “Done”.

The data of the reception completion state for each sub-frame stored in the completion state storage unit 16 by the completion state determination unit 15 is used as a reference when the reception operation control unit 18 controls the next reception operation. is there.

Here, when the determination result is entered in the completion state storage unit 16, the information corresponding to the information stored in the word data storage unit 13 and the m-th sub-frame of the completion state storage unit 16 is stored in the next time. When receiving its own frame, the m-th
Since the data is transmitted in the +1 subframe, in order to compare the error data, it is necessary to move all the data in the word data storage unit 13 and the completion state storage unit 16 by one subframe.

Therefore, in the present apparatus, the position updating means 17
Is provided, and the position updating unit 17 stores the completion state storage unit 1
6 is updated, the data in the word data storage unit 13 and the data in the completion state storage unit 16 are moved by one subframe.

Then, the receiving operation control means 18 sends a receiving operation control signal (control signal) for controlling the next receiving operation to the demodulating section 11 based on the determination result stored in the completion state storage section 16. The subframe including the information that has already been received without error is not to be received next time.

More specifically, if the completion state of the k-th sub-frame in the completion state storage unit 16 is "completed" at the time of performing the reception control, the k-th sub-frame in the own frame will be transmitted at the next reception.
The subframe outputs a control signal so as not to perform the receiving operation. Conversely, if the completion state of the completion state storage unit 16 is “incomplete”, the control signal is output so as to receive the subframe. .

Next, the operation of the present apparatus will be described with reference to FIGS.
This will be specifically described with reference to FIG. FIG. 5, FIG. 6, and FIG.
Temporary storage unit 12, word data storage unit 13,
FIG. 9 is an explanatory diagram showing transition of a storage state of a completion state storage unit 16; Here, a system for transmitting three times will be described. The state at the time when the previous reception is completed is shown in FIG.
As shown in FIG. 1, the temporary storage unit 12 and the word data storage unit 1
3. The position updating means 17 stores the results up to the previous reception.

In the first self-frame reception, s
Following 1, s2, a first subframe (information A), a second subframe (information B), and a third subframe (information C) are received. Information A is the first transmission information, Information B is the transmission 2
The information of the third time, information C, is the information of the third transmission. Here, the first subframe and the third subframe can be received without error, and the second subframe is received with an error.

Then, as shown in FIG. 5B, the received data is stored in the temporary storage unit 12 together with the error data for each word. Next, as shown in FIG.
The word error comparing unit 14 stores the error data in the temporary storage unit 12 and the word data storage unit 1 for each subframe.
3 is compared with the error data in the temporary storage unit 12. If the number of error bits in the temporary storage unit 12 is smaller than that in the word data storage unit 13, the data in the word data storage unit 13 is stored in the temporary storage unit 1.
Update with 2 data.

Then, as shown in FIG. 5D, the completion state judging means 15 checks the error data in the word data storage section 13 to judge the presence or absence of an error for each subframe, and determines the judgment result. The reception completion state (completion state) is stored in the completion state storage unit 16. In the word data storage unit 13, the first sub-frame (information A) and the third sub-frame (information C) which do not include an error are "completed", and the second sub-frame (information B) having an error is
"Unfinished".

Then, as shown in FIG. 5 (5), in preparation for the second reception, the position updating means 17 moves the data in the word data storage section 13 and the completion state storage section 16 one subframe at a time. As a result, in the completion state storage unit 16, the first subframe is blank, the second subframe is "completed", and the third subframe is "incomplete".

Next, the operation at the time of receiving the second self-frame will be described with reference to FIG. At the time of the second reception,
The reception operation control means 18 outputs a reception operation control signal to the demodulation unit 11 based on the data in the completion state storage unit 16, and the demodulation unit 11 performs a reception operation according to the control signal. Therefore, as shown in FIG. 5 (6), the receiving operation is not performed for the second subframe (information A) for which reception has already been completed.

Then, as in the case of FIG. 5, the received data is stored in the temporary storage unit 12 (FIG. 6 (1)), and the word error comparing means 14 stores the data in the temporary storage unit 12 and the word data storage unit 13. And the word data storage unit 13 is updated (FIG. 6 (2)), and the completion state determination unit 15 updates the completion state storage unit 16 based on the word data storage unit 13 (FIG. 6 (3)). ). Here, the word data storage unit 13 and the completion state storage unit 16 are not updated for the second subframe not received at the time of the second reception.

Then, the position updating means 17 updates the data positions in the word data storage section 13 and the completion state storage section 16 (FIG. 6 (4)). Also, since the first subframe (information D) of the second reception was received including an error,
In FIG. 6 (4), the second subframe is “unfinished”.

Next, the operation at the time of the third reception will be described with reference to FIG.
This will be described with reference to FIG. At the time of the third reception, the reception operation control unit 18 outputs a control signal to the demodulation unit 11 based on the data in the completion state storage unit 16 shown in FIG. 6D, and the demodulation unit 11 outputs the control signal based on the control signal. To perform the receiving operation. More specifically, the first subframe (information E) transmitted for the first time and the second subframe (information D) that has not been received at the time of the second reception are received, but the third subframe that has already been received is received. (Information A) is not received.

The completion state of each sub-frame is obtained and stored in the completion state storage unit 16 in the same manner as in FIGS. 5 and 6, and the sub-frame is moved one sub-frame at a time for the next reception. Numeral 18 outputs a control signal based on this at the next reception.

According to the radio paging receiver according to the embodiment of the present invention, the completion state determining means 15 for detecting the presence or absence of an error for each subframe, and the reception completion state (completion state) ), And a receiving operation control unit 18 for controlling the receiving operation in the demodulation unit 11 based on the completion state stored in the completion state storing unit 16.
Determines whether there is an error in the subframe of the received data, and if there is an error, writes the completion state corresponding to the information of the subframe in the completion state storage unit 16 as “incomplete”, and If there is no such information, the completion state corresponding to the information of the subframe in the completion state storage unit 16 is written as “completed”, and the reception operation control unit 1
8 controls the demodulation unit 11 to receive the subframe corresponding to the information whose completion status is “unfinished” in the completion status storage unit 16 at the next reception.
6, the demodulation unit 11 is controlled so as not to receive the subframe corresponding to the information whose completion status is "completed". Can be prevented from being received, and there is an effect that wasteful receiving operation can be prevented and power consumption can be reduced.

Further, according to the present apparatus, in accordance with the information position (sub-frame) at the time of the next repeated transmission,
Since the position updating unit 17 for moving the data of the completion state storage unit 16 by one subframe is provided, when the reception operation control unit 18 refers to the completion state storage unit 16, the next reception subframe and the completion state storage unit 16 corresponds to the completion state, so that there is an effect that the control of the receiving operation is easy.

[0058]

According to the first aspect of the present invention, a plurality of frames including a plurality of subframes including information are transmitted, and further, a plurality of subframes including information having the same content are transmitted in a plurality of consecutive frames. If there is no error in the information of the subframe in the state, the radio paging receiver does not receive the subframe including the information to be transmitted thereafter. There is an effect that unnecessary reception operation can be prevented by not receiving the signal, and power consumption can be reduced.

According to the second aspect of the present invention, a plurality of frames including a plurality of subframes including information are transmitted,
Further, it is used in a state where subframes containing information of the same content are transmitted in a plurality of consecutive frames, and detects the presence or absence of an error for each received subframe, and the completion state determining means When there is no error, the completion state is determined to be “completed”, and the reception operation control unit receives a subframe including the information when the next frame is transmitted for the information determined to be “completed”. The receiver is a paging receiver that controls the demodulation unit so that it does not receive information that has been accurately received once, so that it is not received from the next repetitive transmission, preventing wasteful reception operation and reducing power consumption. There is an effect that can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a receiving operation of a paging receiver according to an embodiment of the present invention, and is a diagram illustrating a case where a first transmission can be received without error.

FIG. 2 is a diagram illustrating a receiving operation of the paging receiver according to the embodiment of the present invention, and is a case where an error is received in the first transmission and an error is received.

FIG. 3 is an explanatory diagram illustrating an example of a receiving operation of the present device in a system that performs transmission three times repeatedly.

FIG. 4 is a configuration block diagram of a radio pager (this apparatus) according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram showing transition of storage states of a temporary storage unit 12, a word data storage unit 13, and a completion state storage unit 16 upon reception.

FIG. 6 is an explanatory diagram showing transition of storage states of a temporary storage unit 12, a word data storage unit 13, and a completion state storage unit 16 upon reception.

FIG. 7 is an explanatory diagram showing transition of storage states of a temporary storage unit 12, a word data storage unit 13, and a completion state storage unit 16 upon reception.

FIG. 8 is an explanatory diagram showing a receiving operation of the synchronization signal and the paging receiver.

FIG. 9 is an explanatory diagram showing a receiving operation in a conventional paging receiver when repeated transmission is performed.

FIG. 10 is an explanatory diagram showing a frame configuration at the time of repeated transmission.

[Explanation of symbols]

11: demodulation unit, 12: temporary storage unit, 13: word data storage unit, 14: word error comparison means, 15 ...
Completion state determination means, 16: completion state storage unit, 17: position updating means, 18: reception operation control means

Claims (2)

[Claims] 1. A state in which a plurality of frames including a plurality of subframes including information are transmitted, and a plurality of subframes including the same information are transmitted in a plurality of consecutive frames. Judge the presence or absence of
A radio paging receiver, characterized in that when there is no error in the information of the subframe, the radio pager does not receive a subframe including the information transmitted thereafter. 2. A radio paging receiver used in a state where a plurality of frames including a plurality of subframes including information are transmitted and a plurality of subframes including information having the same content are transmitted in a plurality of consecutive frames. A demodulation unit that receives and demodulates a radio signal; a completion state determination unit that determines a completion state indicating whether reception of the subframe is completed based on the presence or absence of an error in the received subframe; and the completion state determination unit. Receiving operation control means for controlling the receiving operation of the next frame in the demodulation unit based on the determination result of the completion state in, the completion state determination means, when there is no error in the received sub-frame, The completion status of the information of the subframe is determined as “completed”, and if there is an error in the received subframe, the information of the subframe is Is a completion state determination unit that determines that the completion state of the frame is “incomplete”, and the receiving operation control unit does not receive a subframe including information that the determination result is “completed” when a next frame is transmitted. Wireless reception receiver that controls the demodulation unit as described above and controls the demodulation unit to receive a subframe including information for which the determination result is “incomplete”.