JP2016134743A - Private wireless system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a private wireless system that makes it possible to immediately perform safety confirmation using simple key operation in an emergency.SOLUTION: When a character message, which is related to safety confirmation and includes response possible number information and simple response control information, is transmitted from a character message server 200 to wireless terminal devices PS1 to PSn; users of the wireless terminal devices PS1 to PSn, when the response possible number information is made to be valid by the simple response control information, simply press down an operation key corresponding to the response possible number information to create and return a response message to the safely confirmation.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a local radio system such as a local PHS (Personal Handy-phone System) system.

  As is well known, the local PHS system is a system including a control device that performs all control, a base station, a maintenance terminal that performs settings, a PHS terminal, a character message server, and the like. This type of system provides a data communication service using a personal computer connected to a PHS terminal and a PHS terminal having a wireless communication function in addition to a voice call service.

  For example, when a user intends to acquire desired information from an information provider on the Internet, a call is made from the PHS terminal to the desired information provider. Then, the PHS terminal and the nearest base station are first connected via a wireless line, and then the information provider's server is accessed from the base station via the public network and the Internet. When a communication connection is established between the PHS terminal and the server, information corresponding to the request from the PHS terminal is transmitted from the server to the PHS terminal via the communication connection.

  Thus, the data communication service is very convenient because it can send and receive text messages and access homepages on the Internet anytime and anywhere. The character message is transmitted from the character message server to the PHS terminal, from the PHS terminal to the server, and from the PHS terminal to the PHS terminal.

  In the data communication service using the character message, there is a safety confirmation service for confirming safety in a disaster or the like. If this safety confirmation service is used, for example, the administrator of the character message server or the user of the PHS terminal can confirm the safety of other users in, for example, a remote place or a disaster area by a character message. On the other hand, a user in a remote location or a disaster location can inform the administrator or other users of safety via a wireless line and the Internet.

JP 2001-5370 A

  However, in the above system, when the PHS terminal receives a text message, the key must be pressed many times by reply selection, text creation, transmission selection press, etc. when responding. An immediate response is required to confirm safety in an emergency.

  An object of the present invention is to provide a private wireless system capable of immediately confirming safety by a simple key operation in an emergency.

  In order to achieve the above object, an aspect of the present invention includes the following components. That is, between a wireless terminal device connected to at least one base station device constituting a wireless area via a wireless line and a character message server device connected to the base station device via a communication network A local wireless system for transmitting a character message, wherein the character message server device is response number information for specifying response information for safety confirmation when at least one operation key provided in the wireless terminal device is pressed; When the text message is a message related to safety confirmation, the text message generating means for generating the text message including the simple response control information for validating the replyable number information, and the text message generating means The character message including the response number information and the simple response control information A character message transmitting means for transmitting to the base station device toward the wireless terminal device, wherein the wireless terminal device is a character including the replyable number information and the simple response control information transmitted from the base station device. When the message is received, a display means for displaying the text message, and the simple response when the operation key corresponding to the response number information is pressed in a state where the text message is displayed by the display means. Response information generating means for generating response information specified by the response possible number information when the response possible number information is valid based on control information, and the response information generated by the response information generating means as the character Response information transmitting means for transmitting the message server device to the base station device.

According to this aspect, when a character message related to safety confirmation including response available number information and simple response control information is transmitted from the character message server device to the wireless terminal device, the user of the wireless terminal device uses the simple response control information. When the respondable number information is valid, the response information for the safety confirmation can be generated and returned simply by pressing the operation key corresponding to the respondable number information.
Therefore, it is possible to immediately confirm safety by a simple key operation in an emergency.

  In addition, by transmitting the simple response control information to the wireless terminal device, it is possible to restrict input other than the operation key specified by the response number information at the time of response of the text message, and it is possible to eliminate erroneous transmission.

Moreover, the viewpoint of this invention is equipped with the following embodiments, It is characterized by the above-mentioned.
In the first embodiment, in the display means, when the received text message is a text message related to the safety confirmation, a safety confirmation reception pictograph indicating that the text message related to the safety confirmation has been received, It is preferentially displayed in a display form different from that of the text message reception pictograph.

  According to the first embodiment, the user of the wireless terminal device can immediately determine whether or not the received text message is a text message related to safety confirmation by looking at the display screen.

  In the second embodiment, the reception history information is a combination of a first flag indicating that a text message related to the safety confirmation is received and a second flag indicating that another text message is received. Reception history information generating means for generating and recording on a recording medium is provided.

  According to the second embodiment, by displaying a list of reception history information recorded on the recording medium, the user of the wireless terminal device confirms the reception status of the text message related to the safety confirmation separately from other text messages. it can.

  ADVANTAGE OF THE INVENTION According to this invention, the local radio | wireless system which can perform safety confirmation immediately by simple key operation in emergency can be provided.

1 is a schematic configuration diagram of a local PHS system of the present invention. The functional block diagram of the radio | wireless terminal apparatus which concerns on this invention. The safety confirmation message transmission sequence diagram which concerns on this invention. The flowchart which shows the control procedure of the radio | wireless terminal apparatus at the time of performing the normal safety confirmation as a comparative example. The screen figure of the radio | wireless terminal apparatus at the time of performing the normal safety confirmation as a comparative example. The flowchart which shows the control procedure of the radio | wireless terminal apparatus at the time of performing the safety confirmation which concerns on the 1st Embodiment of this invention. The screen figure of the radio | wireless terminal apparatus at the time of confirming the safety which concerns on the 1st Embodiment of this invention. The screen figure which shows the reception pictogram of the normal character message used as a comparative example. The screen figure which shows the reception log list of the normal text message used as a comparative example. The figure which shows an example of the screen which shows the safety confirmation reception pictogram concerning the 2nd Embodiment of this invention. The figure which shows an example which the screen which shows the safety confirmation reception pictogram concerning the 2nd Embodiment of this invention switches. The figure which shows another example which the screen which shows the safety confirmation reception pictogram concerning the 2nd Embodiment of this invention switches. The figure which shows an example which erases the safety confirmation reception pictogram concerning the 2nd Embodiment of this invention. The figure which shows an example which switches the safety confirmation receiving pictogram concerning the 2nd Embodiment of this invention to a normal receiving pictogram. The figure which shows another example which erases the safety confirmation reception pictogram concerning the 2nd Embodiment of this invention. The figure which shows the list of the reception log | history of the safety confirmation message which concerns on the 2nd Embodiment of this invention. The figure which shows the format of the normal character message used as a comparative example.

Embodiments according to the present invention will be described below with reference to the drawings.
Since the present invention can be preferably applied to a private wireless system, the following description will be made assuming a private PHS system using PHS.

  FIG. 1 is a schematic configuration diagram of a local PHS system of the present invention, and CS1 indicates a PHS base station. A plurality of base stations CS1 (only one is shown in FIG. 1) are geographically distributed in a service area covered by the system, and one or a plurality of base stations CS1 form a radio area.

  PS1 to PSn (n is a natural number) indicate wireless terminal apparatuses using PHS. These radio terminal apparatuses PS1 to PSn are connected via a radio line in the cell formed by the base station CS1. The wireless terminal devices PS1 to PSn include a mobile information terminal having a data communication function and a wireless access function, and a mobile phone having a personal computer connected thereto, in addition to a mobile phone having only a call function.

  The base station CS1 is connected to the control device 100 via a LAN, the Internet, or a metal cable. In addition, a character message server 200 and a maintenance terminal 300 are connected to the control device 100 via a LAN, for example. The character message server 200 has a function as a mail server when character messages are transmitted between the wireless terminal devices PS1 to PSn and a wired terminal device on the Internet.

  The control device 100 includes a base station control interface unit (base station control IF) 110 and a main control board 120. The base station control interface unit 110 communicates call control signals, mobility management control signals, and user information such as voice and data with the base station CS1.

  The main control board 120 includes a PS control task 121, a replacement task 122, and an operation management unit 123. The PS control task 121 communicates call control signals, mobility management control signals, and user information such as voice and data with the base station control interface unit 110, and exchanges data from the base station control interface unit 110. In addition to transmitting to the task 122, conversely, data from the exchange task 122 is transmitted to the base station control interface unit 110.

  The exchange task 122 exchanges user information such as voice or data between the PS control task 121 and the operation management unit 123. The operation management unit 123 manages the operation of the character message server 200, and transmits data from the character message server 200 to the exchange task 122 and transmits data from the exchange task 122 to the character message server 200.

  By the way, the character message server 200 in the embodiment includes a character message generation unit 211 and a character message transmission unit 212. The character message generation unit 211 and the character message transmission unit 212 are realized by a CPU, a RAM, and a ROM.

  The character message generation unit 211 stores or generates a character message composed of a header and message data, and also specifies a response information for safety confirmation when at least one operation key provided in the wireless terminal devices PS1 to PSn is pressed. Possible number information and simple response control information for validating replyable number information when the text message is a message related to safety confirmation are generated.

  The header includes a destination terminal ID and a source terminal ID. The specific safety confirmation content is entered in the message data in text format. Response number information represents one number with 1 bit. For example, “001” can input “1”, “003” can input “1” and “2”, and “3FF” can be “0”. Indicates that “9” can be input. The simple response control information indicates that there is no simple response when it is “0”, and indicates that there is a simple response when it is “1”.

  The character message transmission unit 212 transmits a character message including the replyable number information and simple response control information generated by the character message generation unit 211 to the base station CS1 toward the wireless terminal devices PS1 to PSn.

On the other hand, the radio terminal apparatuses PS1 to PSn are configured as shown in FIG. Here, the wireless terminal device PS1 will be described as a representative.
The RF unit 11 is an analog circuit for transmitting and receiving a 1.9 GHz band radio signal, for example. The L1 processing unit 12 performs PHS layer 1 processing, and performs channel coding (modulation / demodulation) processing, bit synchronization / frame synchronization, error detection, and the like.

  The L2 processing unit 13 performs PHS layer 2 processing, performs frame / deframe processing, and provides conversion between physical slots and functional channels.

  The ADPCM unit 14 audio-decodes TCH (Traffic Channel) data from the L2 processing unit 12, outputs the data to the speaker, encodes an audio signal from the microphone, and outputs the encoded signal to the L2 processing unit 12.

  The CPU 15 executes part of PHS layer 2 processing (link establishment, etc.), layer 3 processing (call control, mobility management, radio management, etc.), application processing, and the like. The movement management of the layer 3 process includes a position registration process. For application processing, the GPS assist data transmitted from the network side is held and provided to a GPS / IMES receiver (not shown) in addition to the functions of a general mobile radio telephone (phone book function, mail function). Includes functionality.

The keypad 18 is a group of push buttons that accept user operations.
The key controller 19 monitors the state of the keypad 18 and buffers the key code while generating an interrupt to the CPU 15 when the button is pressed.

  A dot matrix LCD (liquid crystal display) 20 displays a plurality of lines of characters, simple icons (pictograms), etc., and provides a visual interface to the user. The LCD controller 21 performs control for drawing characters on the dot matrix LCD 20 and scrolling the display.

  The ROM 22 is, for example, a NOR flash memory, and stores an OS, a program, and data (firmware) executed by the CPU 15.

  The RAM 23 is, for example, an SRAM, and holds temporary data. This data may include a dictionary in which the GPS assist data received from the network side, the CS-ID, and the IMES PRN are associated with each other.

  The timer 24 is a device called Programmable Timer / Counter, for example, and generates a timer interrupt at a designated time.

  The external I / F 25 is, for example, USB (trademark), and is used for firmware rewriting, user, data reading, writing, and the like. It also serves as an interface with industrial keypads / touch panels and card readers / writers.

  By the way, the CPU 15 includes a character message display control unit 15a, a response information generation unit 15b, a response information transmission unit 15c, and a reception history information generation unit 15d as functions according to the embodiment of the present invention.

  When the character message display control unit 15a receives a character message related to safety confirmation sent from the base station CS1, the character message display control unit 15a stores the received character message in the RAM 23 and also stores the character message stored in the dot matrix LCD 20 in the RAM 23. As well as a safety confirmation reception pictograph indicating that a text message related to safety confirmation has been received. In this case, the message is displayed in a display form different from that for receiving a normal text message.

  When the response key generating unit 15b is enabled to respond based on the simple response control information when the operation key corresponding to the response possible number information is pressed while the character message is displayed on the dot matrix LCD 20. In addition, the response information specified by the response number information is generated.

The response information transmitting unit 15c transmits the response information generated by the response information generating unit 15b toward the character message server 200 to the base station CS1.
The reception history information generation unit 15 d generates reception history information that combines a flag indicating that a text message related to safety confirmation has been received and a flag indicating that a normal text message has been received, and records the reception history information in the RAM 23.

(First embodiment)
Prior to the first embodiment, an operation for normal safety confirmation will be described.

  Assume that the administrator of the text message server 200 needs to confirm the safety of a remote place or a damaged place where a disaster has occurred. In this case, the administrator activates an application for transmitting a text message, and inputs various header information and a message indicating the content of the safety confirmation from the input unit of the text message server 200, for example, as shown in FIG. Create a text message.

  When the creation of the text message is finished, the sequence shown in FIG. 3 is started. The character message server 200 accesses the control device 100 and notifies each wireless terminal device PS1 to PSn (only the wireless terminal device PS1 is shown in FIG. 3) of the incoming message (S3a). This message arrival notification is transmitted to the exchange task 122 via the operation management unit 123 (S3b).

  The exchange task 122 transmits an incoming call request to the PS control task 121 (S3c). Then, the PS control task 121 transmits a SETUP message indicating that a text message has been received to the base station control interface unit 110 (S3d). When the base station control interface unit 110 receives the SETUP message, the base station control interface unit 110 calls, for example, the wireless terminal device PS1 serving as a destination via the base station CS1 (S3e).

  When receiving the incoming call, the wireless terminal device PS1 transmits a message (ALERT) indicating that the SETUP message has been correctly received to the PS control task 121 via the base station CS1 and the base station control interface unit 110 (S3f, S3g). ). Then, the PS control task 121 notifies the exchange task 122 of the completion of the incoming call (S3h).

  Subsequently, when the wireless terminal device PS1 responds to the incoming call, it transmits a CONNECT message to the PS control task 121 via the base station CS1 and the base station control interface unit 110 (S3i, S3j). Then, the PS control task 121 notifies the replacement task 122 of off-hook (S3k).

  Thereafter, the exchange task 122 transmits a message delivery request to the character message server 200 via the operation management unit 123 (S3l, S3m).

  The character message server 200 transmits a character message designating the wireless terminal device PS1 as a destination to the exchange task 122 (S3n, S3o). The exchange task 122 transmits a text message by INFO to the wireless terminal device PS1 via the PS control task 121, the base station control interface unit 110, and the base station CS1 (S3p, S3q, S3r).

  FIG. 4 is a flowchart showing a normal message processing procedure in the wireless terminal device PS1.

  When the wireless terminal device PS1 receives the text message relating to the safety confirmation (step ST4a), the wireless terminal device PS1 displays the screen shown in FIG. When the user presses the response key in this state (step ST4b), the wireless terminal apparatus PS1 displays a reply / transfer screen shown in FIG. 5B on the dot matrix LCD 20 (step ST4c).

  When the user presses the enter key (step ST4d), the wireless terminal device PS1 displays a transmission message creation screen shown in FIG. 5C on the dot matrix LCD 20 (step ST4e). When the user presses the enter key in this state (step ST4f), the wireless terminal device PS1 displays a text creation screen shown in FIG. 5D on the dot matrix LCD 20 (step ST4g).

  When the creation of the transmission message is completed and the determination key is pressed (step ST4h), the wireless terminal device PS1 displays a reply screen shown in FIG. 5E on the dot matrix LCD 20 (step ST4i). When the user presses the enter key in this state (step ST4j), the wireless terminal device PS1 returns a character message to the character message server 200 (step ST4k), and the screen shown in FIG. To display.

  Thus, the text message is transferred to the exchange task 122 via the base station CS1, the base station control interface unit 110, and the PS control task 121 (S3s, S3t, S3u). When this character message arrives, the exchange task 122 notifies the character message server 200 that the message transmission response is OK together with the character message via the operation management unit 123 (S3v, S3w).

  Thereafter, the wireless terminal device PS1 transmits a DISC message to the PS control task 121 (S3-1, S3-2), and when a release (REL) message is returned from the PS control task 121 (S3-3, S3). -4), a release completion message is transmitted to the PS control task 121 (S3-5, S3-6). Then, the PS control task 121 notifies a disconnection completion message to the exchange task 122 (S3-7).

  By the way, in the above procedure, when responding to a text message, the key has to be pressed a plurality of times for message creation or the like.

  Therefore, in the first embodiment, a simple response can be made by adding replyable number information and simple response control information to a message of a text message.

  FIG. 6 is a flowchart showing a message processing procedure of the wireless terminal device PS1 in the first embodiment.

  When the wireless terminal device PS1 receives the text message related to the safety confirmation (step ST6a), the wireless terminal device PS1 displays the screen shown in FIG. When the user presses the “1” or “2” key in this state (step ST6b), the wireless terminal device PS1 determines whether or not it is a simple response based on the simple response control information included in the text message ( Step ST6c).

  If it is determined that the response is a simple response (YES), the wireless terminal device PS1 determines whether “1” or “2” pressed by the user is an input enabled key (step ST6d). Here, if it is determined that the key is an input enabled key (YES), the wireless terminal device PS1 displays a reply screen shown in FIG. 7B on the dot matrix LCD 20 (step ST6e). When the user presses the enter key in this state (step ST6f), the wireless terminal device PS1 returns a character message to the character message server 200 (step ST6g), and the screen shown in FIG. To display.

  On the other hand, if it is determined in step ST6c that the response is not a simple response (NO), the wireless terminal device PS1 invalidates “1” or “2” pressed by the user (step ST6h). If it is determined in step ST6d that the key is not an input-capable key (NO), the radio terminal apparatus PS1 proceeds to the process in step ST6b.

  The administrator of the character message server 200 causes the display unit (not shown) to display a response message for the safety confirmation from each of the wireless terminal devices PS1 to PSn stored in the character message server 200. For example, the administrator of the character message server 200 It is possible to confirm the safety of the user in the disaster area.

As described above, according to the first embodiment, when the character message relating to the safety confirmation including the response number information and the simple response control information is transmitted from the character message server 200 to the wireless terminal devices PS1 to PSn, wireless communication is performed. The user of the terminal device PS1 to PSn generates a response message for safety confirmation and returns it by simply pressing the operation key corresponding to the response number information when the response number information is valid by the simple response control information. can do.
Therefore, it is possible to immediately confirm safety by a simple key operation in an emergency.

  In addition, by transmitting the simple response control information to the wireless terminal devices PS1 to PSn, it is possible to restrict input other than the operation key specified by the respondable number information at the time of the response of the text message, and eliminate erroneous transmission. Can do.

(Second Embodiment)
The second embodiment creates a new safety confirmation reception pictogram in addition to the normal message reception pictogram in the PHS corresponding to the safety confirmation service, and informs the user that the text message received by the display is a safety confirmation message. The present invention also relates to a function for presenting a message indicating that it is a safety confirmation message different from a normal message in the message reception history display.

Prior to the second embodiment, an operation for normal safety confirmation will be described.
Normally, when a message is received, the message is displayed on the screen, and the message reception pictograph is also displayed at the top of the screen.

  The received message display is updated and disappears when a high-priority event such as a key press, alarm ringing, fall alarm, or incoming call occurs. Therefore, as shown in FIG. 8, a message reception pictograph indicating that a message has been received is displayed.

  Using this existing message reception function, a new safety confirmation message function is realized, but if the received message screen disappears due to the occurrence of a high-priority event, whether a safety confirmation message has been received, a normal message is displayed. Because it is indistinguishable from the pictogram of whether it was received, safety confirmation is very important, but it does not respond immediately when you receive a safety confirmation message or forgets to respond There may be a problem. Further, even in the message reception history list display, as shown in FIG. 9, if the safety confirmation display is not made distinguishable, the same problem can be considered.

  Therefore, in the second embodiment, in order to solve the problem that the safety confirmation message and the normal message cannot be distinguished from each other, a pictogram for safety confirmation is created, and a character “flag” (flag) is included in the reception history. ) Is given so that the distinction can be made.

  When receiving the safety confirmation message, the wireless terminal device PS1 causes the character message display control unit 15a to blink the newly defined safety confirmation reception pictograph (inverted display of the existing message reception pictograph). Even when the message reception pictogram is being displayed first, as shown in FIG. 10, the display is switched to the safety confirmation reception pictogram display.

  Even if the incoming call is received while the safety confirmation reception pictograph is blinking and the screen changes, as shown in FIG. 11, the character message display control unit 15a continues the safety confirmation reception pictograph with the blink display as it is.

  When the safety confirmation message is received after receiving the normal message, the text message display control unit 15a switches to the safety confirmation reception pictograph as shown in FIG.

  When the safety confirmation message is received and the safety confirmation response is transmitted, as shown in FIG. 13, when there is no unread safety confirmation message in the message reception history in the RAM 23, the CPU 15 deletes the safety confirmation reception pictograph. At this time, if there is unread message reception, a normal message reception pictograph is displayed as shown in FIG.

  If the unread normal message and the safety confirmation message disappear due to the confirmation of the reception history, the pictograph display disappears as shown in FIG.

  As shown in FIG. 16, the reception history information generation unit 15d displays [Not] when unread on the display screen of the reception history list, [Same] when receiving safety confirmation by broadcast notification, and when receiving a normal text message. Is blank, and when receiving safety confirmation, [Low] is displayed so that it can be confirmed that the safety confirmation has been received.

  According to the second embodiment, the user of the wireless terminal device PS1 to PSn sees the safety confirmation reception pictograph displayed on the display screen of the dot matrix LCD 20, so that the received text message is a text message related to safety confirmation. It can be immediately determined whether or not.

  In addition, according to the second embodiment, the reception history information recorded in the RAM 23 is displayed in a list on the dot matrix LCD 20, so that the users of the wireless terminal devices PS1 to PSn can check the reception status of the text message related to the safety confirmation. It can be confirmed separately from other text messages.

(Other embodiments)
The present invention is not limited to the above embodiments. For example, the character message format, the character message transmission protocol, the configuration of each wireless terminal device, and the like can be variously modified without departing from the scope of the present invention.

  In addition, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

  DESCRIPTION OF SYMBOLS 11 ... RF part, 12 ... L1 process part, 13 ... L2 process part, 14 ... ADPCM part, 15 ... CPU, 15a ... Character message display control part, 15b ... Response information generation part, 15c ... Response information transmission part, 15d ... Reception history information generation unit, 18 ... keypad, 19 ... key controller, 20 ... dot matrix LCD, 21 ... LCD controller, 22 ... ROM, 23 ... RAM, 24 ... timer, 100 ... control device, 110 ... base station control interface 120 ... Main control board 121 ... PS control task 122 ... Exchange task 123 ... Operation management unit 200 ... Character message server 211 ... Character message generator 212 ... Character message transmitter 300 ... Maintenance terminal CS1 ... base station, PS1 to PSn ... wireless terminal apparatus.

Claims (3)

A character message between a wireless terminal device connected to at least one base station device constituting a wireless area via a wireless line and a character message server device connected to the base station device via a communication network A local wireless system for transmitting
The character message server device
Responsible number information for identifying response information for safety confirmation when at least one operation key provided in the wireless terminal device is pressed, and the response possible number information when the text message is a message related to safety confirmation. A character message generating means for generating a character message including the simple response control information to be enabled;
Character message transmission means for transmitting the character message including the replyable number information generated by the character message generation means and the simple response control information to the base station device toward the wireless terminal device,
The wireless terminal device
Display means for displaying the text message when receiving the text message including the replyable number information and the simple response control information sent from the base station device;
When the response key number information is valid based on the simple response control information when an operation key corresponding to the response number information is pressed while the text message is displayed by the display means, Response information generating means for generating response information specified by the response possible number information;
A private wireless system comprising: response information transmitting means for transmitting the response information generated by the response information generating means to the base station device toward the character message server device.   The display means, when the received text message is a text message related to the safety confirmation, a safety confirmation reception pictograph indicating that the text message related to the safety confirmation is received, as a reception pict of another text message. The premise wireless system according to claim 1, wherein the preferential display is performed in a different display form.   Further, reception history information is generated by combining the first flag indicating that the text message related to the safety confirmation is received and the second flag indicating that the other text message is received, and is recorded on the recording medium. The local wireless system according to claim 1 or 2, further comprising reception history information generating means.