JP2015041258A - Radio transmitter, radio receiver and radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communication system capable of firming-up a program of a radio receiver such as a house-to-house receiver with higher success probability than a conventional technology.SOLUTION: A radio transmitter for a radio communication system for transmitting the data of the firmware of a radio receiver via a unidirectional radio line from the radio transmitter to the radio receiver is configured to divide the data of the firmware into the data of a plurality of blocks, and to transmit the data of each block to which data for error detection are added, and to repeat the transmission of each block data of the firmware several times. The radio receiver is configured to receive the data of each block of the firmware transmitted from the radio transmitter, and to determine whether or not the correct restoration of the received data of each block of the firmware is successful on the basis of the data for error detection, and to, when the correct restoration of the data of each block is successful, store the data of the block in storage means, and to store the success of the correct restoration of the data of each block in a determination column.

Description

  The present invention relates to a wireless communication system that transmits a wireless signal in one direction from a wireless transmission device to a wireless reception device in a wireless communication system such as a regional disaster prevention wireless system, and in particular, a control station for the regional disaster prevention wireless system. The present invention relates to a wireless transmission device such as a transmitter and a wireless reception device such as a separate receiver.

  Consists of control station transmitters installed in municipal offices, multiple relay stations installed in small hills and mountains, and multiple individual station receivers installed in each house for regional disaster prevention such as earthquakes and tsunamis The local disaster prevention radio system is put into practical use (for example, refer to Patent Documents 1 and 2).

  The applicant manufactures and sells the control station transmitter and door-to-door receiver of the regional disaster prevention radio system, but the door-to-door receiver is not purchased by the individual, but is purchased by the local government and lent to each household. After installing a door-to-door receiver in each household, it was often necessary to upgrade the firmware to fix bugs and improve the functionality of the software of the door-to-door receiver. At that time, we store new firmware in a notebook personal computer, go to the site, visit each household one by one, connect the personal computer to a separate receiver, and upgrade the farm.

JP 2000-224058 A JP 2002-135849 A

  However, since the door-to-door receivers are installed in all households in the area, it is practically impossible to ask residents to upgrade their farms using personal computers. If the product delivered by the local government is a software bug, if it is a maker's mistake, it is said that it will come and be fixed, regardless of the cost. After it was installed in each household, it was very expensive and time consuming to renovate each house.

  In order to solve the above problems, the applicant transmits one firmware update data from the control station transmitter to the door-to-door receiver, and the door-to-door receiver receives the door-to-door reception based on the received firmware update data. Developed and put into practical use a wireless communication system (hereinafter referred to as a conventional example) that upgrades the machine program. In this conventional example, a farm can be automatically upgraded using a wireless line without using a personal computer. Therefore, even if the applicant does not go to repair each household of the individual receivers individually, it is possible to use the wireless line. Firmware upgrade is completed simply by sending the firmware upgrade program data.

  However, in general, the error rate of the wireless channel is not 0, and the installation location and installation position of the individual receiver may vary, and the propagation state of the wireless channel may be poor. There is a low probability that the firmware upgrade of the individual receiver is successful, and if the failure is unsuccessful, the program of the individual receiver is broken and the individual receiver becomes inoperable.

  An object of the present invention is to solve the above problems, for example, a radio communication system capable of upgrading a program of a radio receiver such as a door-to-door receiver of a regional disaster prevention radio system with a higher probability of success compared to the prior art, and for that purpose The object is to provide a wireless transmission device and a wireless reception device.

A wireless transmission device according to a first invention is a wireless transmission device for a wireless communication system that transmits firmware data of a wireless reception device from a wireless transmission device to a wireless reception device via a one-way wireless line,
Transmitting means for dividing the firmware data into a plurality of blocks of data, adding error detection data to each block of data and transmitting the data, and repeating the transmission of each block of the firmware multiple times It is characterized by.

  In the wireless transmission device, the number of times each block data of the firmware is transmitted by the transmission means is a sufficient number of times to correctly restore and complete all the block data of the firmware in the wireless reception device. And

According to a second aspect of the present invention, there is provided a radio reception apparatus for transmitting firmware data of a radio reception apparatus from the radio transmission apparatus according to claim 1 to the radio reception apparatus via a one-way radio line. A wireless receiver,
Storage means for storing a table including data of each block of firmware for each block number of firmware and a determination column for storing whether or not the data has been correctly restored;
When the data of each block of firmware transmitted from the wireless transmission device is received, and it is determined whether or not the data of each block of firmware received based on the error detection data has been correctly restored. Stores the data of the block in the storage means and stores in the determination column that it has been correctly restored, but if the data cannot be correctly restored, the block does not store the data in the storage means and That the data could not be correctly restored, and when the data could be correctly restored in all the determination columns of the plurality of blocks, the data of each block of the firmware stored in the storage means is combined to form the wireless receiver And a control means that is activated and used as firmware.

  In the wireless reception device, when the transmission of each block data of the firmware by the transmission means is the second time or later, the control means re-stores each block data of the firmware that can be correctly restored and stored in the storage means again. It is not stored.

  Further, in the wireless reception device, the wireless reception device has an individual number uniquely assigned to itself, and the control means receives data of each block of firmware transmitted from the wireless transmission device. In addition, the data of each block of the firmware is received only when its own individual number is designated.

  According to a third aspect of the present invention, there is provided a radio communication system including the radio transmission device and the radio reception device.

  Here, the wireless communication system is a regional disaster prevention wireless system.

  Therefore, according to the radio communication system, the radio transmitter and the radio receiver for the radio communication system according to the present invention, for example, the program of the radio receiver such as the door-to-door receiver of the regional disaster prevention radio system has a higher success probability than the conventional technology. You can upgrade the farm.

It is a block diagram which shows the structure of the regional disaster prevention radio system which concerns on embodiment of this invention. It is a block diagram which shows the structure of the control station transmitter 1 of FIG. It is a block diagram which shows the structure of the separate receiver 2 of FIG. It is a block diagram which shows the structure of EEPROM31 of the door-to-door receiver 2 of FIG. It is a flowchart which shows the received signal reception process performed by the controller 30 of the separate receiver 2 of FIG.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In addition, in each following embodiment, the same code | symbol is attached | subjected about the same component.

  FIG. 1 is a block diagram showing a configuration of a regional disaster prevention radio system according to an embodiment of the present invention. In FIG. 1, the regional disaster prevention radio system according to this embodiment includes a control station transmitter 1 that is a radio transmission device, a plurality of relay stations 3, and a plurality of individual receivers 2 that are radio reception devices. Is done. A radio signal transmitted from the control station transmitter 1 is transmitted toward the relay station 3 from the antenna 1A. The relay station 2 receives the transmitted radio signal by the antenna 3A, and then performs high-frequency amplification, demodulation, modulation, and power amplification, and transmits the signal from the antenna 3B to the individual receiver 2. The door-to-door receiver 2 receives and demodulates a radio signal from the relay station 3, and outputs, for example, an audio broadcasting signal for regional disaster prevention through a speaker. That is, the wireless system is a one-way system from the control station transmitter 1 to the door-to-door receiver 2 via the relay station 3. In FIG. 1, the relay station 3 is provided. However, the present invention is not limited to this, and the relay station 3 is not provided, and the radio signal from the control station transmitter 1 can be directly received by the individual receiver 2. You may comprise.

  FIG. 2 is a block diagram showing the configuration of the control station transmitter 1 of FIG. In FIG. 2, a control station transmitter 1 includes a controller 10 that controls the operation of the control station transmitter 1, an update program storage memory 11 that stores firmware, a clock circuit 12 that measures the current time, and the number of firmware transmissions. The number-of-transmissions memory 13 for storing the data, the operation unit 14 for instructing the operation of the control station transmitter 1, the display unit 15 for displaying the operation state of the control station transmitter 1, the operation instruction contents, etc. A USB (Universal Serial Bus) interface 16 for inputting to and storing the update program storage memory 11 from the computer via the external data terminal 17; a PTT (Push To Talk) switch 18 for instructing transmission; a microphone 21; Controlled by the audio signal modulation circuit 22, the baseband signal modulation circuit 23, and the controller 10. A switch 24 that includes a radio transmission circuit 25, and an antenna 1A.

  When the user of the control station transmitter 1 performs audio broadcasting, the PTT switch 18 is turned on. At this time, the controller 10 switches the switch 24 to the contact a side. The user's voice is converted into a voice signal by the microphone 21 and input to the voice signal modulation circuit 22. The audio signal modulation circuit 22 modulates a predetermined carrier signal by a predetermined digital modulation method according to the input audio signal, and outputs the modulated signal to the wireless transmission circuit 25 via the contact a side of the switch 24 for wireless transmission. The circuit 25 upconverts the modulation signal into a predetermined radio signal, and then amplifies the power and radiates it from the antenna 1A.

  When transmitting the data of the firmware for repair of the door-to-door receiver 2 from the control station transmitter 1, the controller 10 switches the switch 24 to the contact b side. The controller 10 reads the data of the repair firmware stored in the update program storage memory 11 and divides the data of the repair firmware into a plurality of firmware block data. Add error detection data such as The transmission is a time designation transmission by designating a time in a time zone in which there is almost no audio broadcasting such as at night and referring to the time counted by the clock circuit 12, and all the individual receivers 2 are repaired. A plurality of transmission times sufficient for completion (referred to as the number of times that is preset and stored in the transmission number memory 13 and repeated a plurality of times). At each transmission, the controller 10 outputs the data of each divided firmware block to the baseband signal modulation circuit 23, and the baseband signal modulation circuit 23 outputs a predetermined carrier signal to a predetermined digital signal according to the input data of each firmware block. The modulated signal is modulated, and the modulated signal is output to the wireless transmission circuit 25 via the contact b side of the switch 24. The wireless transmission circuit 25 upconverts the modulated signal into a predetermined wireless signal, and then amplifies the power. Radiates from the antenna 1A.

  FIG. 3 is a block diagram showing the configuration of the door-to-door receiver 2 of FIG. In FIG. 3, the individual receiver 2 includes a controller 30 that controls the operation of the individual receiver 2 and an EEPROM (e.g., flash memory (registered trademark)) that stores firmware that is a rewritable operation program of the controller 30. Electrically Erasable and Programmable Read Only Memory) 31, an operation unit 32 for instructing the operation of the individual receiver 2, a display unit 33 for displaying the operation content of the individual receiver 2 and the operation content of the operation unit 32, The USB interface 34 for writing the firmware to the EEPROM 31 from an external personal computer through the external data terminal 35, the antenna 2A, the wireless reception circuit 41, the audio signal demodulation circuit 42, the switch 43, and the audio signal amplifier 44. A speaker 45, a baseband signal demodulation circuit 46, It is configured with.

  When receiving the radio signal from the individual receiver 2, the radio signal received by the antenna 2A is input to the radio reception circuit 41, and the radio reception circuit 41 performs signal processing such as high-frequency amplification and down-conversion on the received radio signal. After being converted into a predetermined baseband signal, it is output to the audio signal demodulation circuit 42 and the baseband signal modulation circuit 46. Here, when receiving the audio broadcast signal, the controller 30 turns on the switch 43. The audio signal demodulation circuit 42 demodulates the input baseband signal into an audio broadcast signal, and then outputs it via the speaker 45 via the switch 43 and the audio signal amplifier 44. Further, when receiving firmware data, the controller 30 turns off the switch 43. The baseband signal demodulation circuit 46 demodulates the received baseband signal into a firmware data signal, and then outputs it to the controller 30. A detailed operation at the time of receiving firmware data will be described below with reference to FIGS.

  FIG. 4 is a block diagram showing a configuration of the EEPROM 31 of the door-to-door receiver 2 of FIG. In FIG. 4, the EEPROM 31 has a main area 31a and a buffer area 31b. Firmware for controlling the individual receiver 2 is stored in the main area 31a. Further, the updating firmware transmitted from the control station transmitter 1 is temporarily stored in the buffer area 31b. Here, in the buffer area 31b, for each block number, the data of the divided firmware block and its judgment column (circled when the received firmware block data is correctly restored are marked with ○ and not correctly restored. Is added to the table). The present embodiment is characterized in that, in the version up process, the firmware block data once restored is not rewritten at the second and subsequent reception (see FIG. 5). If the determination column for all firmware blocks is ◯, the data of each firmware block is collectively transferred to the main area 31a, and the individual receiver 2 is restarted based on the data.

  FIG. 5 is a flowchart showing received signal reception processing executed by the controller 30 of the individual receiver 2 of FIG. In the embodiment of FIG. 5, the number of firmware data divisions is set to 100.

  In FIG. 5, it is determined in step S1 whether or not the received signal is firmware data. If YES, the process proceeds to step S3. If NO, the process proceeds to step S2. In step S2, an audio broadcast signal reception process is executed, that is, the switch 43 is turned on to output the audio broadcast signal from the speaker 45, and the process returns to step S1.

  In step S3, the firmware data is received, and in step S4, the block number n is initialized to 1. In step S5, it is determined whether or not the determination column for the block number n in the buffer area 31b of the EEPROM 31 is x. Advances to step S6, while if NO, advances to step S10. Next, in step S6, it is determined whether or not the block number n of the firmware data has been correctly restored based on the error detection data added by the control station transmitter 1. If YES, the process proceeds to step S7. If NO, the process proceeds to step S9. In step S7, ○ is stored in the determination column for block number n, and in step S8, the data of block number n in the firmware data is written in the buffer area 31b, and the process proceeds to step S10. On the other hand, in step S9, x is stored in the determination column for block number n, and the data of block number n in the firmware data is not written to the buffer area 31b, and the process proceeds to step S10. In step S10, 1 is added to block number n, and the addition result is set to block number n. In step S11, it is determined whether or not n = 101. If YES, the process proceeds to step S12. If NO, Advances to step S5.

  In step S12, it is determined whether or not all the determination columns in the buffer area 31b are ◯. If YES, the process proceeds to step S13. If NO, the process returns to step S1. In step S13, the block data of the firmware stored in the buffer area 31b are combined, transferred to the main area 31a as firmware, and overwritten. In step S14, the door-to-door receiver 2 is restarted using the firmware in the main area 31a, and the process returns to step S1.

  Due to the nature of the regional disaster prevention radio system, the data sent from the control station transmitter 1 is one-way, and there is no means to send back to the control station transmitter 1 whether the individual receiver 2 has received it correctly. The machine 1 has no way of confirming whether the firmware has been successfully upgraded. This point is fundamentally different from firmware upgrade by bi-directional communication that sends back an acknowledgment signal (ACK).

  According to the present embodiment configured as described above, for example, a program of a wireless reception device such as a door-to-door receiver of a regional disaster prevention wireless system can be upgraded with a higher probability of success compared to the related art. Specific actions and effects will be described below.

  In the prior art method, if a bug occurs in the door-to-door receiver 2, the door-to-door receiver 2 installed in each household must be refurbished one by one. Therefore, huge costs and time loss occur.

  Next, when the wireless communication system according to the conventional example is used, the user of the individual receiver 2 transmits firmware via a wireless line without any action and automatically upgrades the firmware, so there is almost no loss cost. Does not occur. For example, especially if it is transmitted every night at night, it has no effect. Even during transmission of firmware update data, if urgent audio broadcasting is necessary, data transmission can be stopped halfway, and the firmware is not broken in this embodiment.

  Although not shown in the door-to-door receiver 2 of FIGS. 4 and 5, each door-to-door receiver 2 is assigned with an individual number and stored in the EEPROM 31. It is also possible to transmit firmware having a specific function for only 2 via a wireless line. In addition, this applies not only to firmware data but also to setting data set for each individual receiver 2. That is, the individual receiver 2 has an individual number uniquely assigned to itself. When the controller 30 receives the data of each block of the firmware transmitted from the control station transmitter 1, the individual receiver 2 receives the individual number. The data of each block of firmware is received only when designated.

  As described above, according to the present embodiment, the selling point is that “you can change the setting data and add functions later without going around each household.” become.

  In the above embodiment, the regional disaster prevention radio system has been described. However, the present invention is not limited to this, and can be applied to various radio communication systems.

The reason why the firmware data is divided into a plurality of blocks and transmitted is as follows. For example, the firmware byte count is 100 KB. Further, the data transmission success rate of the wireless line is set to 50% (0.5) per 1 KB, for example. In other words, it is assumed that sending 1 KB of firmware fails once every two times. If the 100 KB firmware is sent as it is on the wireless line, the probability of success is 0.5 to the 100th power, which is ^7.9-31 , which is the same as not succeeding forever.

  However, if the firmware data is divided and sent in units of 1 KB and the transmission data of each block is OK and the subsequent transmission data is ignored, all blocks are OK in two transmissions. Actually, the success rate of data transmission over a wireless line varies greatly because it is greatly affected by the distance from the control station transmitter 1 or the relay station 3 and the installation location of the individual receiver 2, but it must be transmitted repeatedly. The data of all blocks is finally OK.

  As described above in detail, according to the wireless communication system, the wireless transmission device and the wireless reception device therefor, the program of the wireless reception device such as the door-to-door receiver of the regional disaster prevention wireless system is compared with the prior art. The farm can be upgraded with a high probability of success.

1. Control station transmitter,
1A ... antenna,
2 ... door-to-door receiver,
2A ... Antenna,
3 ... Relay station
3A, 3B ... antenna,
10 ... Controller,
11 ... Update program storage memory,
12 ... Clock circuit,
13 ... Number of transmissions memory,
14 ... operation part,
15 ... display part,
16 ... USB interface,
17 ... External data terminal,
18 ... PTT switch,
21 ... Microphone,
22: Audio signal modulation circuit,
23. Baseband signal modulation circuit,
24 ... switch,
25 ... wireless transmission circuit,
30 ... Controller,
31 ... EEPROM,
31a ... main area,
31b ... buffer area,
32 ... operation unit,
33 ... display section,
34 ... USB interface,
35 ... External data terminal,
41 ... wireless receiver circuit,
42. Audio signal demodulation circuit,
43 ... switch,
44. Audio signal amplifier,
45 ... Speaker,
46: Baseband signal demodulation circuit.

Claims (7)

A wireless transmission device for a wireless communication system for transmitting firmware data of a wireless reception device from a wireless transmission device to a wireless reception device via a one-way wireless line,
Transmitting means for dividing the firmware data into a plurality of blocks of data, adding error detection data to each block of data and transmitting the data, and repeating the transmission of each block of the firmware multiple times A wireless transmitter characterized by the above.   2. The number of times of transmission of each block data of firmware by said transmission means is a number sufficient to correctly restore and complete all of each block data of firmware in said wireless receiving device. Wireless transmitter. A wireless reception device for a wireless communication system for transmitting firmware data of a wireless reception device from the wireless transmission device according to claim 1 to the wireless reception device via a one-way wireless line,
Storage means for storing a table including data of each block of firmware for each block number of firmware and a determination column for storing whether or not the data has been correctly restored;
When the data of each block of firmware transmitted from the wireless transmission device is received, and it is determined whether or not the data of each block of firmware received based on the error detection data has been correctly restored. Stores the data of the block in the storage means and stores in the determination column that it has been correctly restored, but if the data cannot be correctly restored, the block does not store the data in the storage means and That the data could not be correctly restored, and when the data could be correctly restored in all the determination columns of the plurality of blocks, the data of each block of the firmware stored in the storage means is combined to form the wireless receiver And a control unit that is activated and used as firmware for the wireless receiver.   When the transmission of each block data of firmware by the transmission means is the second time or later, the control means does not store again each block data of the firmware that has been correctly restored and stored in the storage means The wireless receiver according to claim 3. The wireless receiver has an individual number uniquely assigned to itself,
The control means receives the data of each block of the firmware only when its own individual number is designated when receiving the data of each block of the firmware transmitted from the wireless transmission device. The wireless receiving device according to claim 3 or 4. The wireless transmission device according to claim 1 or 2,
A wireless communication system comprising the wireless reception device according to claim 3.   The wireless communication system according to claim 6, wherein the wireless communication system is a regional disaster prevention wireless system.

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