JP2000278729A - Radio selection call receiver with display function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuous receiving function capable of receiving information of large capacity in addition to an individual receiving function by providing a receiver with a receiving mode for selectively receiving information from a transmission system in accordance with an individual selection call number and selectively receiving corresponding information and a receiving mode for continuously receiving information. SOLUTION: The reception of an FM radio wave, the reception of an HSDS signal and the system synchronization of an HSDS system are realized by searching receiving frequency by initial packet synchronization and a receiver is set up so as to receive only a packet corresponding to its own individual address. The receiver repeats receiving operation at each fixed time on the basis of the set state. After the lapse of fixed time, receiving timing is set up and the receiver receives a message packet predicted as a packet including its own individual selection call number. A message packet including a prescribed data identification number is judged as a message packet including continuous data and continuous data are displayed and stored.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio selective calling receiver having a display function, and more specifically, a receiving mode for selectively receiving information corresponding to an individually selected calling number at least as a receiving mode. And a receiving mode for continuously receiving information and information. The switching of the receiving mode is performed by a control signal included in the packet, and the receiving mode is selectively operated according to the information transmission amount. Technology.

[0002]

2. Description of the Related Art As the information-oriented society advances, the value of information has rapidly increased. Also, with the increase in the amount of information, many information receivers that receive such valuable information can receive everything from just call functions to a series of messages composed of numbers and letters, etc. Have been.

[0003] In the conventional radio selective call receiver with a display function, the amount of information to be transmitted is limited, and large amounts of data cannot be transmitted. There is also a wireless system for transmitting a large amount of data, but it does not have the function of a wireless selective call receiver, and existing receivers are limited in use. Also, Japanese Unexamined Patent Publication No.
There is also an information service in which a common selection call number (hereinafter, referred to as a common address) corresponding to an information service is fixedly incorporated and information corresponding to the common selection call number is transmitted as in 91531. Although information can be transmitted to a large number of receivers, the amount of information is the same as when individual information is transmitted to individual receivers, and a large amount of data cannot be transmitted.

[0004]

According to the present invention, in a radio selective call receiver with a display function, each of the receivers has an individual selective call number corresponding to a paging address, and transmits individual information corresponding to the individual selective call number to each receiver. It is an object of the present invention to provide a continuous reception function for continuously receiving a large amount of data in addition to an individual reception function for receiving a large amount of data.

It is another object of the present invention to provide a function of switching between the individual reception function and the continuous reception function by using a control signal embedded in individual information.

[0006]

According to a first aspect of the present invention, there is provided a radio selective call receiver with a display function having at least an individual selective call number, and transmitting information transmitted from a transmission system in correspondence with the individual selective call number. Selectively receiving and selectively receiving information corresponding to the individually selected call number, and a reception mode for continuously receiving information transmitted from the transmission system. I do.

According to the above configuration, in addition to the function of transmitting specific information to a specific receiver, which is a feature of the radio selective call receiver with a display function, there is an effect that a large amount of data can be transmitted.

According to a second aspect of the present invention, in the radio selective call receiver with a display function, the switching from the selective reception mode to the continuous reception mode is performed based on information corresponding to the individually selected call number. It is performed according to the mode control data included therein.

According to the above configuration, there is an effect that the transmission system can control switching from the reception mode for selectively receiving individual data to the reception mode for continuously receiving individual data.

According to a third aspect of the present invention, in the radio selective call receiver with a display function, the switching from the continuous reception mode to the selective reception mode is performed based on information corresponding to the individually selected call number. It is performed according to the mode control data included therein.

According to the above configuration, there is an effect that the switching from the continuous reception mode to the reception mode for selectively receiving individual data can be controlled from the transmission system.

According to a fourth aspect of the present invention, in the radio selective call receiver with a display function, the switching from the continuous reception mode to the selective reception mode is performed in the continuous reception mode. It is performed by the data included in the obtained information.

According to the above configuration, switching to the reception mode for selectively receiving is performed based on the received information, so that there is an effect that more accurate switching is possible.

According to a fifth aspect of the present invention, in the wireless selective call receiver with a display function, the switching from the continuous reception mode to the selective reception mode is performed in the continuous reception mode. The continuous mode is terminated when there is no longer a data identification symbol indicating that the data included in the information is continuous data.

According to the above configuration, the mode is switched to the reception mode for selectively receiving data with or without continuous data based on the received information, so that there is an effect that more accurate switching is possible.

According to a sixth aspect of the present invention, in the radio selective call receiver with a display function, the information received in the continuous reception mode is configured to receive packet data continuously. I do.

According to the above configuration, since the error correction can be added for each packet by using packet data, there is an effect that real-time transmission is reliably performed.

According to a seventh aspect of the present invention, in the radio selective call receiver with a display function, the information transmitted from the transmission system is such that data is divided into a packet format, and at least a packet including individual data and mode control data are included. And a packet including continuous data, and each of the packets is provided with a data identification symbol indicating the type of the packet.

According to the above configuration, since the packet can be identified, there is an effect that the control of the reception mode or the like becomes easy after the reception of the packet.

In the wireless selective call receiver with a display function according to claim 8, the mode control data is configured to include time information at which the continuous reception mode starts and time information at which the continuous reception mode ends. It is characterized by having.

According to the above configuration, there is an effect that the timing for switching the reception mode can be set by the control data.

10. The radio selective call receiver with a display function according to claim 9, wherein the mode control data includes a position on a time axis where a packet at which the continuous reception mode starts exists, and a packet at which the continuous reception mode ends. Is characterized by including information on the position on the time axis in which.

According to the above configuration, since the information on the data amount and the position on the time axis where the packet exists is not ready to correspond,
This has the effect that the setting of the reception mode switching timing is easy.

In the wireless selective call receiver with a display function according to any one of the first to tenth aspects, the individual selective call number is a common individual selective call number owned by a plurality of the wireless selective call receivers with a display function. It is characterized by having been constituted as follows.

According to the above configuration, there is an effect that a large amount of data can be transmitted to a plurality of radio selective call receivers having a display function at the same time.

[0026]

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

In recent years, various radio selective call receivers have been manufactured. Among them, there is the HSDS system using FM subcarriers. The HSDS system is disclosed in
36330, JP-A-63-158924, JP-A-1-2
31437, paging system using FM multiplexing, receptor HSDS (broadcasting technology May 1994 P
161 to 170), the paging signal is incorporated in the packet signal, and the time axis is assigned to each packet and the individually selected calling number corresponding to each packet, and transmitted. Since the receiving operation can be set only during the time when there is a possibility that the packet corresponding to the individually selected calling number exists, the battery consumption is greatly reduced. The present invention has been invented as a function most suitable for the above-mentioned HSDS system.

FIG. 1 is an explanatory diagram showing the structure of a packet which is the basis of the present invention. In FIG. 1, a packet 6 of the HSDS system is composed of 260-bit data, and the packet 6 is composed of a 20-bit flag 7 and 240-bit link data 8. Packet 6 includes 1024 message packets, 3 control packets, 3 control packets 0, and 4 control packets 1
And 5 are part of a subframe composed of control packets 2. The message packet included in the subframe is 0 to 10 starting from the earlier time axis.
Numbers up to 23 are assigned. Subframe 2 is
It is composed of 64 subframes, and the master frame 1
It has become. Master frame 1 follows the time axis,
Starting from subframe 0 in order, subframe 63
Then, the next subframe also becomes subframe 0, which is the start of the next master frame. The contents of each subframe are configured in the same manner as subframe 2, and start from control packet 0 of 3 and proceed to message packet 1023, and control packet 0 at the start of the next subframe is transmitted next. Is done.

FIG. 2 is a block diagram of a radio individual receiver with a display function according to the present invention. The microcomputer 15 includes the front-end circuit 10, the detection circuit 1
1, data demodulation circuit 12, decoder circuit 13 and display 1
Data control and power control of each circuit block of No. 4 are performed to control the reception mode according to the present invention.

FIG. 3 is a flowchart for controlling the wireless individual receiver with display function according to the present invention. This flowchart is configured by a program in a memory built in the microcomputer 15.

FIG. 4 is a timing chart for setting each circuit block according to the present invention to an operation state. The microcomputer 15 controls the operation. The upper part of the level is expressed as level high, and the lower part of the level is expressed as level low. The level-high portion 26 of T1 represents a section of one main frame. T2 to T8 are at the level high, and indicate the operation state of each circuit block.

FIG. 5 shows the structure of various packets according to the present invention. The message packet 34 includes an individually selected call number 35, a data part 36, and an error correction part 37. The data section 36 includes a plurality of types of data sections, and FIG. 5 illustrates three types, that is, one including the individual data 39, one including the mode control data 41, and one including the continuous data 43. The type of each packet is configured so that it can be identified by the data identification symbol part. The individual data is provided with 38 data identification symbols A, the mode control data is provided with 40 data identification symbols B, and the continuous data is provided with 42 data identification symbols C.

The basic operation of the thus-configured radio selective call receiver with a display is as follows.
The program is realized by a program incorporated in the program, and performs the operation shown in the flowchart of FIG. The program starts from a start 16 by an operation such as power-on or reset. First, packet synchronization 17 is performed. Here, a search for a reception frequency is performed, reception of FM radio waves, H
SDS signal reception and HSDS system synchronization are realized, and the receiver is set to receive only the packet corresponding to its own individual address. With this setting, the receiving operation of the receiver is repeated at regular intervals. The determiner 18 determines the reception interval. After a certain time, the reception timing comes. Packet reception 19
Receives a message packet predicted to include its own individually selected call number. The next discriminator 20 determines whether the individually selected calling number matches the received individually selected calling number. If they do not match,
In order to wait for the next reception timing, the process returns to the discriminator 18 again. If the individually selected call number matches the received individually selected call number, the discriminator 21 determines whether it is display data. The determination is made based on the data identification symbol included in the message packet. As shown in FIG. 5, in the case of the data identification symbol A of 38, since it is the individual data 39, the individual data is sent to the display of FIG. 2 and stored in the memory built in the microcomputer in the same manner as when it is displayed. . This is performed in the individual data display and individual data storage 22 of the flowchart. If the data is not individual data, the discriminator 23 determines whether the data is control data. The determination as to whether the data is control data is made by the data identification symbol B4 in FIG.
If 0 exists in the message packet, it is determined to be control data. If it is not the control data, the process returns to the discriminator 18 to receive the next message message packet. The control data 41 includes a time reference for the start and stop of the continuous data (this can be the time information itself, or the start and stop positions of the message packet corresponding to the time axis. Shall be included). In the next packet reception 24, it is predicted that continuous data will be sequentially transmitted in the form of packets within the time set in the continuous reception mode. The first packet is received. Judge 2
At 5, it is determined whether the first received packet is continuous data. The message packet including the data identification code C42 in FIG. 5 is determined to be a message packet including the continuous data 43, and the process proceeds to the next processing, continuous data display, and continuous data storage 26. Here, the continuous data is sent to the display of FIG.
It is stored in a memory built in the microcomputer 15. If the discriminator 25 determines that the data is not continuous data, the data packet actually includes the data identification symbol B, but the continuous data is not actually transmitted, or the continuous data is transmitted within the set time of the continuous data. Is the data terminated? This process is effective when the end time of the continuous data is not exactly known at the start of the continuous data. In such a case, the continuous reception mode is minimized and the power consumption is reduced. It has the effect of reducing. Next to the processing 26 is a decision element 27.
It is determined whether or not it is the end time of the continuous data set in advance in the control data 41. If it is within the set time, the process returns to step 24 to receive the next packet. Subsequent processing is as described above. If the set time has elapsed, the process returns to the discriminator 18, and the packet at the next timing is received.

FIG. 4 shows the timing at which the microcomputer 15 controls the radio selective call receiver with a display function of FIG. T1 is level high 26,
It represents one time section of the master frame. In practice, the master frame is continuous when one master frame ends and the next master frame starts. T2 indicates a section on the time axis corresponding to a message packet containing the individually selected call number of the receiver at the level high 27. Basically, in this section, the microcomputer 15 operates each circuit block via the control lines S2, S3, S4, S5 and S6. During operation, an operation current flows through each circuit, and the FM radio wave signal S received from the antenna 9 is transmitted.
1 is amplified by the front end circuit 10 and the amplified signal S
7 is detected by the detection circuit 11, and the baseband signal S8
And enters the data demodulation circuit 12. Data demodulation circuit 1
2, the digital signal S9 is output, enters the decoder circuit 13, is decoded into a digital signal S10 for display on a display, and is input to the display 14. Conversely, in the low-level section of T2, the operation current is cut off in each circuit other than the display 14, and only a small standby current flows. With such an operation, HSDS
Low power consumption, a feature of the system, is realized. T3 is
This shows the timing of the receiving operation when the receiver described above has another selective call number. This is a case where application to an information service is performed using a common selection call number. T4 represents an operation section of the receiver at 29 when continuous data is detected at the reception timing of the individually selected call number of T2. The length of this section is set by time information and the like included in the control data 41 as described above. T5 is a timing chart when the control data 41 is received at the time of receiving the common selection call number of T3, and the section 30 is in the continuous reception mode in the same manner as T4. T6 is a timing chart showing that the long-time continuous reception mode, section 31, has been set when the individually selected call number is received. T7 indicates a section 32 in which continuous data is actually transmitted. In this case, the continuous reception mode is shorter than the section 31 as in the section 33 of T8 because the detection of the absence of the continuous data is performed within the set section of the actual continuous reception mode.

The present invention can be applied not only to the selective call receiver with a display function of the HSDS system but also to various systems such as the POCSAG system, and the use thereof is not limited.

[0036]

As described above, according to the radio selective call receiver with a display function of the present invention, in addition to the function of selectively transmitting data to a specific receiver, a large amount of data can be transmitted to the receiver. When a selective or common selective calling number is used, transmission to many common receivers is possible.

In the continuous reception mode for transmitting a large amount of data, power consumption is large, so that a short time is required as much as possible. The present invention has means for shifting to the normal mode for receiving individual data when the necessity of the continuous reception mode is eliminated, so that the power consumption can be minimized.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of a packet which is a basis of the present invention.

FIG. 2 is a block diagram of a wireless individual receiver with a display function according to the present invention.

FIG. 3 is a flowchart for controlling a wireless individual receiver with a display function according to the present invention.

FIG. 4 is a timing chart for setting each circuit block according to the present invention to an operation state.

FIG. 5 is a diagram showing a configuration of various packets according to the present invention.

[Explanation of symbols]

 S2. Signal for controlling front end circuit S3. Signal for controlling detection circuit S4. Signal for controlling data demodulation circuit S5. Signal for controlling decoder circuit S6. Signal to control the display

Claims (10)

[Claims] 1. A radio selective call receiver with a display function having at least an individually selected call number and selectively receiving information transmitted from a transmission system in accordance with the individually selected call number. A radio selective call receiver with a display function, comprising both a reception mode for selectively receiving information corresponding to a number and a reception mode for continuously receiving information transmitted from the transmission system. 2. The switching from the selective reception mode to the continuous reception mode is performed by mode control data included in information corresponding to the individually selected call number. The radio selective call receiver with a display function according to claim 1, wherein: 3. The method according to claim 1, wherein the switching from the continuous reception mode to the selective reception mode is performed by mode control data included in information corresponding to the individually selected call number. The radio selective call receiver with a display function according to claim 1, wherein: 4. The switching from the continuous reception mode to the selective reception mode is performed by data included in information received in the continuous reception mode. The radio selective call receiver with a display function according to claim 1, wherein: 5. The switching from the continuous reception mode to the selective reception mode is performed when the data included in the information received in the continuous reception mode is continuous data. 2. The radio selective call receiver with a display function according to claim 1, wherein the continuous mode is terminated when the data identification symbol indicating the presence of the data is no longer present. 6. The radio selective call reception with display function according to claim 1, wherein the information received in the continuous reception mode is configured to receive packet data continuously. Machine. 7. The information transmitted from the transmission system,
Data is divided into packet formats, and at least a packet containing individual data, a packet containing mode control data and a packet containing continuous data exist, and each packet has a data identification indicating the type of the packet. 2. The radio selective call receiver with a display function according to claim 1, wherein a symbol is added. 8. The display function according to claim 1, wherein said mode control data includes time information at which said continuous reception mode starts and time information at which said continuous reception mode ends. With radio selective call receiver. 9. The mode control data includes: a position on a time axis where a packet at which the continuous reception mode starts is present;
2. The radio selective call receiver with a display function according to claim 1, wherein information on a position on a time axis where the packet in which the continuous reception mode ends is present is included. 10. The personal selection call number, wherein the individual selection call number is a common individual selection call number owned by a plurality of the radio selective call receivers with a display function. Wireless selective call receiver with display function as described.