JP4549390B2 - Wireless communication system - Google Patents

Description

The present invention relates to a wireless communication system that wirelessly transmits mail data generated by a communication terminal device from a wireless device via a mail server, and in particular, transmits the same mail data to a plurality of destinations in a single transmission. The present invention relates to a wireless communication system.
The present invention also relates to a wireless communication system that wirelessly transmits mail data generated by a communication terminal device from a wireless device via a mail server, and in particular, when a plurality of mail data is transmitted, an empty channel of the wireless device is used. The present invention relates to a wireless communication system that transmits mail data.

(First background art)
FIG. 11 shows a configuration example of the wireless communication system.
In addition, although the same code | symbol is attached | subjected about the thing similar to the structure part shown by FIG. 1 which concerns on the Example of this invention mentioned later, detailed description is not limited by this.
The wireless communication system shown in FIG. 11 includes a management terminal device 1, a mail server 51, a communication software server 52, a software wireless device 4, and communication terminal devices A 1 to A 3 that are connected to a LAN (Local Area Network) 7. It is connected and configured. The software defined radio 4 includes a power amplifier 5 and an antenna 6.
The mail server 51 stores a DNS (Domain Name System) record 61 and the electronic mail file 24. This DNS record 61 is composed of an A record similar to that shown in FIG. 4 and an MX record similar to that shown in FIG.
The communication software server 52 stores communication software B1 to Bn corresponding to each of a plurality of functions.
The mail server 51 has a function of receiving e-mails from the communication terminal apparatuses A1 to A3, a function of transmitting e-mails to the communication terminal apparatuses A1 to A3, a function of transmitting e-mails to another base, It has a function to receive e-mails from other locations.
In the function of sending an e-mail to another base, a software radio device is sent to a mail server that is a next transfer destination installed at another base on the basis of the contents of the DNS record 61 that is normally used. 4 to send an e-mail. As the application protocol, for example, general SMTP (Simple Mail Transfer Protocol) can be used.
In the function of receiving an e-mail from another base, the e-mail transmitted from a mail server installed at another base is received and stored. As the application protocol, for example, general SMTP can be used.
FIG. 12 shows an example of a communication flow in the case where an electronic mail is created by the communication terminal device A1 existing at the base A and the destination is the base B and the base C.
(1) An electronic mail is created by the communication terminal device A1, and the destination exists at the BBB (BBB@SERVER-B.xxx.xxx) and the C base corresponding to the mail server B of the wireless communication system existing at the B base. CCC (CCC@SERVER-C.xxx.xxx) corresponding to the mail server C of the wireless communication system is set (process T21).
(2) An electronic mail transmission operation is performed in the communication terminal device A1.
(3) An electronic mail is transmitted from the communication terminal device A1 to the mail server A (mail server 51) (process T22).
(4) Based on the contents of the DNS record 61, the mail server A transmits an e-mail to the mail server B installed at the site B corresponding to the destination BBB (process T23). Since the transmission is to the other base B, the transmission is via the software radio 4.
(5) The mail server A transmits an e-mail addressed to the mail server C installed at the site C corresponding to the destination CCC which is another transmission destination (process T24). Since transmission is to another base C, transmission is via the software radio 4.
Thereby, the electronic mail transmitted from the base A is transmitted to the destination BBB and the destination CCC.
FIG. 13 shows an example of the state of e-mail transmission between bases as described above.
In this example, an electronic mail is transmitted from the software defined radio 4 of the wireless communication system 71 installed at the site A to each of the sites B and C, and an email addressed to the site B is installed at the site B. Received by the software radio of the wireless communication system 72, and an e-mail addressed to the base C is received by the software radio of the radio communication system 73 installed at the base C.
(Problems related to the first background art)
However, in the wireless communication system as described above, when the same electronic mail is transmitted to a plurality of places as described above, it is necessary to transmit the same electronic mail a plurality of times, and the processing load is large. For example, when two e-mail destinations are registered and the mail servers corresponding to these destinations are installed in different bases B and C, respectively, e-mail transmission to the base B and the base C are performed. Two transmission processes such as e-mail transmission occur.
(Second background technology)
FIG. 21 shows a configuration example of a wireless communication system.
In addition, although the same code | symbol is attached | subjected about the thing similar to the structure part shown by FIG. 14 which concerns on the Example of this invention mentioned later, this does not intend to limit this invention by this.
The wireless communication system shown in FIG. 21 includes a management terminal device 101, a mail server 131, a communication software server 132, a software radio 133, and communication terminal devices A11 to A1m connected via a LAN 107. It is configured. The software defined radio 133 includes a power amplifier 105 and an antenna 106.
The mail server 131 stores an electronic mail file 123.
The communication software server 132 stores communication software G1 to Gn corresponding to each of a plurality of functions (for example, mail A, voice B,...).
The software defined radio 133 stores communication software C21 and C22 corresponding to a plurality of functions (for example, mail A and voice B).
The mail server 131 has a function of receiving e-mails from the communication terminal apparatuses A11 to A1m, a function of transmitting e-mails to the communication terminal apparatuses A11 to A1m, a function of transmitting e-mails to another base, It has a function to receive e-mails from other locations.
In the function of sending an e-mail to another site, for example, based on the contents of a DNS record that is normally used, a software radio is sent to a mail server that is a next transfer destination installed at another site. An electronic mail is transmitted via the machine 133. As the application protocol, for example, general SMTP can be used.
In the function of receiving an e-mail from another base, the e-mail transmitted from a mail server installed at another base is received and stored. As the application protocol, for example, general SMTP can be used.
FIG. 22 shows an example of a communication flow when an electronic mail is created by the communication terminal devices A11 and A12 and the electronic mail is transmitted.
(1) The electronic mail 1 is created by the communication terminal device A11, and “mail A1” is selected from the wireless names capable of electronic mail transmission, and a transmission operation is performed (process T111). FIG. 18 shows an example of a radio name selection screen of the communication terminal device (e-mail).
(2) The electronic mail 1 is transmitted from the communication terminal device A11 to the mail server A.
(3) The mail server A transmits the electronic mail 1 to the mail server installed at another base via the software defined radio.
(4) In addition, the electronic mail 2 is created by the communication terminal device A12, and “mail A1” is selected from the wireless names capable of electronic mail transmission, and a transmission operation is performed (process T112).
(5) The e-mail 2 is transmitted from the communication terminal device A12 to the mail server A.
(6) The mail server A waits for the transmission of the electronic mail 2 until the transmission of the electronic mail 1 with the wireless name “mail A1” is completed by the software defined radio (processing T113).
(7) Then, after the transmission of the electronic mail 1 is completed, the mail server A transmits the electronic mail 2 via the software defined radio. When the transmission of the e-mails 1 and 2 is completed, the software defined radio transmits a transmission completion notification to that effect to the mail server A.
Thereby, an e-mail transmitted from a certain base is transmitted to another base.
(Problems related to the second background art)
However, in the wireless communication system as described above, when a plurality of electronic mails are transmitted, a channel of a wireless device that is not used may be generated wastefully. For example, if the wireless name “mail A1” and the wireless name “mail A2” can be used to send e-mails to the site A, the two communication terminal devices both select the wireless name “mail A1”. When the e-mail is transmitted to the site A, two e-mails are transmitted with the radio name “mail A1” without using the radio name “mail A2”, and the empty channel is fully utilized. I can't.
JP 2002-269008 A

The present invention has been made in view of the above-described conventional situation (problem related to the first background art). When transmitting mail data generated by a communication terminal device from a wireless device via a mail server by wireless. An object of the present invention is to provide a wireless communication system capable of transmitting the same mail data to a plurality of destinations in a single transmission.
In addition, the present invention has been made in view of the above-described conventional situation (problem related to the second background art), and the mail data generated by the communication terminal device is wirelessly transmitted from the wireless device via the mail server. An object of the present invention is to provide a wireless communication system capable of effectively using an empty channel by transmitting mail data using an empty channel of a wireless device when transmitting a plurality of mail data. .
In order to achieve the above object (solution of the problem relating to the first background art), in the wireless communication system according to the present invention, the mail data generated by the communication terminal device has the following configuration via the mail server. Transmit wirelessly from the radio.
That is, a communication unit that communicates mail data between the mail server and the wireless device is provided.
The communication terminal apparatus generates mail data having destination information destined for one or a plurality of other system apparatuses connected via wireless communication by the wireless device, and the generated mail data Is transmitted to the mail server.
The mail server includes means for storing correspondence between destination information and a transfer destination, means for receiving mail data from the communication terminal device, and destination information of the received mail data based on the stored contents. The mail data is transmitted to the communication unit when the communication unit is stored as a transfer destination.
The communication unit includes means for receiving mail data from the mail server, and means for transmitting the received mail data to the wireless device.
The wireless device includes means for receiving mail data from the communication unit and means for wirelessly transmitting the received mail data.
The example of the process performed by the radio | wireless communications system which concerns on this invention which has such a structure is shown.
That is, the communication terminal device generates mail data and transmits the generated mail data to the mail server. Destination information is added to this mail data. This destination information is addressed to the device of one or a plurality of other systems connected to the wireless communication system according to the present invention via wireless communication by the wireless device.
The mail server stores correspondence between the destination information and the forwarding destination, receives the mail data from the communication terminal device, and detects the forwarding destination corresponding to the destination information of the received mail data based on the stored contents. If the detected transfer destination is a communication unit, the received mail data is transmitted to the communication unit.
The communication unit receives mail data from the mail server and transmits the received mail data to the wireless device.
The wireless device receives mail data from the communication unit and transmits the received mail data wirelessly.
Therefore, even when the destination information of the mail data generated by the communication terminal device includes address information (destination information) of a plurality of different places (for example, a plurality of different systems), each of the plurality of address information corresponds. When it is stored in the mail server that the transfer destination is the communication unit, only one piece of mail data is sent from the mail server to the communication unit for the plurality of address information, and the communication unit passes through the radio. For example, when the mail data generated by the communication terminal device is transmitted wirelessly from the wireless device via the mail server, the same mail data is transmitted to a plurality of different destinations (one transmission) ( It can be transmitted to a device corresponding to each address information.
Here, various wireless devices may be used, and for example, a software wireless device can be used.
Moreover, as a communication part, for example, you may be provided integrally with the communication software server etc. with which a radio | wireless communications system is provided, or may be provided as a separate apparatus.
Various devices such as a communication terminal device, a mail server, a communication unit, a wireless device such as a software wireless device, and a communication software server may be used.
In addition, as another system connected to the wireless communication system according to the present invention via wireless communication, for example, a wireless communication system provided in another place (base) is used. In this case, a plurality of different systems are used. Wireless communication systems provided at locations are connected to each other using a wireless communication function such as a software radio.
In the communication terminal device, the mail data and the destination information thereof are generated in accordance with, for example, an operation by a person (user).
Various types of destination information of mail data may be used. For example, the destination is a communication terminal device provided in another wireless communication system B as viewed from the wireless communication system A according to the present invention. Address information composed of address information, or address information destined for a communication terminal device provided in another radio communication system B as viewed from the radio communication system A according to the present invention and provided in another radio communication system C It is possible to use one configured from address information destined for the communication terminal device provided, or one configured from a large number of address information. When the destination information of the mail data includes a plurality of address information, one piece of mail data is collectively transmitted from the mail server to the communication unit for those associated with the communication unit as a transfer destination. In addition, for a transfer destination associated with something other than the communication unit, for example, the mail data is wirelessly transmitted from the mail server for each address information directly via a wireless device.
Various correspondences between the destination information stored in the mail server and the forwarding destination may be used. As the destination information, not all of the address information indicating the destination is necessarily used. For example, the domain name information included in the address information can be used. This is effective in a configuration in which a provided mail server is specified.
Further, in the mail server, for example, when a mail server of another wireless communication system is stored as a transfer destination of certain destination information instead of the communication unit, the destination information is received from the communication terminal device. Mail data is directly transmitted wirelessly via a wireless device.
Further, the communication unit corresponds to, for example, means for storing the correspondence between the destination information (for example, information such as the domain name) and the transfer destination, and the destination information of the mail data received from the mail server based on the stored contents. Means for detecting a transfer destination, means for storing the correspondence between the transfer destination and the address information of the radio, and means for detecting the address information of the radio corresponding to the transfer destination detected based on the stored contents Then, the received mail data is transmitted to the wireless device having the detected address information. In this case, in the communication unit, even if the destination information of the mail data received from the mail server includes a plurality of address information (destination information) and the transfer destinations corresponding to each of the plurality of address information are different, If the address information of the wireless devices corresponding to a plurality of transfer destinations is the same, one piece of mail data is transmitted to the wireless device having the address information for the plurality of transfer destinations.
Below, the structural example of the above-mentioned radio | wireless communications system is shown.
As one configuration example, the communication unit stores a correspondence between the destination information and the forwarding destination, and a means for detecting a forwarding destination corresponding to the destination information of the mail data received from the mail server based on the stored content. And means for storing correspondence between the transfer destination and the address information of the wireless device, and means for detecting address information of the wireless device corresponding to the transfer destination detected based on the stored contents, and the detected address information The received mail data is transmitted to the wireless device.
As one configuration example, domain name information included in address information indicating a destination is used as the destination information.
As one configuration example, the other system or the mail server provided therein is specified by the domain name.
As an example of the configuration, the communication unit is provided integrally with a communication software server.
As an example of the configuration, a radio communication system provided at another base is used as the other system.
As an example of the configuration, the communication unit or the mail server receives the reception completion notification from the transmission destination, thereby confirming that the mail data has reached the base of the transmission destination.
As an example of the configuration, the communication unit or the mail server receives a reception completion notification transmitted after a waiting time corresponding to a random number has elapsed from each of a plurality of bases serving as transmission destinations.
In order to achieve the above-mentioned object (solution of the problem related to the second background art), in the wireless communication system according to the present invention, the mail data generated by the communication terminal device is sent via the mail server with the following configuration. Transmit wirelessly from the radio.
That is, the communication terminal device generates means for mail data, and means for specifying channel identification information for identifying a channel used for wirelessly transmitting mail data to a device of another system by the wireless device. And means for transmitting the generated mail data and the designated channel identification information to the mail server.
The mail server is configured to store a correspondence between channel identification information and a transmission destination, a means to receive mail data and channel identification information from the communication terminal device, and the received based on the stored contents. When the channel identified by the channel identification information is not used (that is, not used) by the corresponding radio, the mail data is transmitted to the corresponding radio so that the channel is used. On the other hand, when the channel identified by the received channel identification information is being used by the corresponding radio, the other channel identification information associated with the same transmission destination as the channel identification information is searched for A method of transmitting the mail data to the corresponding radio so that the channel identified by the retrieved channel identification information is used. Having.
The wireless device has means for receiving mail data from the mail server and means for wirelessly transmitting the received mail data using a channel.
The example of the process performed by the radio | wireless communications system which concerns on this invention which has such a structure is shown.
That is, the communication terminal device generates mail data, and specifies information (channel identification information) for identifying a channel used for wirelessly transmitting the mail data to a device of another system by a wireless device. The generated mail data and designated channel identification information are transmitted to the mail server.
The mail server stores the correspondence between the channel identification information and the transmission destination, and receives mail data and channel identification information from the communication terminal device. Then, in the mail server, if the channel identified by the received channel identification information is not used by the corresponding wireless device based on the stored contents, the corresponding channel is used so that the channel is used. On the other hand, when the channel identified by the received channel identification information is being used by the corresponding radio, the same destination as the channel identification information is associated. The other channel identification information is searched, and the mail data is transmitted to the corresponding radio so that the channel identified by the searched channel identification information is used.
The wireless device receives mail data from the mail server and wirelessly transmits the received mail data using the channel.
Therefore, in the mail server, when the channel specified in the management terminal device is being used by the wireless device, the other channel associated with the same transmission destination is searched and the other channel is used. For example, when a plurality of pieces of mail data are transmitted when the mail data generated by the communication terminal device is wirelessly transmitted from the wireless device via the mail server. Even when the designated channels overlap, the empty channel can be used effectively by transmitting the mail data using the empty channel of the wireless device.
Here, various channels may be used for wireless communication. For example, a plurality of channels having different frequencies used for communication, a plurality of channels having different times used for communication, and communication. It is possible to use a plurality of channels having different codes such as spreading codes used in the above, a plurality of channels combining two or more of these, and the like.
Various information may be used as information for identifying a channel (channel identification information).
The transmission destination may be managed using, for example, an address, or may be managed using a group number or a group name representing the transmission destination.
In addition, the mail server has a function of determining or managing whether each channel is in use or not in use by a wireless device corresponding to each channel.
Below, the structural example of the above-mentioned radio | wireless communications system is shown.
As one configuration example, radio name information or operation method information is used as channel identification information.
As one configuration example, the communication terminal apparatus specifies channel identification information according to an instruction from a user or according to a preset condition.
As an example of the configuration, the mail server transmits the mail data and information for specifying a channel to be used (channel specifying information) to a corresponding wireless device. The wireless device wirelessly transmits the mail data received from the mail server using a channel specified by the channel specifying information received from the mail server. Note that various information may be used as the channel specifying information.
As one configuration example, the wireless device includes a plurality of wireless devices. Each wireless device performs wireless communication using one or a plurality of channels.

FIG. 1 is a diagram showing a configuration example of a radio communication system according to an embodiment of the present invention.
FIG. 2 is a diagram showing an example of a wireless information file.
FIG. 3 is a diagram showing an example of a wireless device usage status file.
FIG. 4 is a diagram showing an example of the A record.
FIG. 5 is a diagram showing an example of the MX record.
FIG. 6 is a diagram showing an example of the revised A record.
FIG. 7 is a diagram showing an example of the revised MX record.
FIG. 8 is a diagram showing an example of a flow of e-mail communication from the communication terminal device.
FIG. 9 is a diagram showing an example of e-mail transmission between bases.
FIG. 10 is a diagram showing an example of the flow of receiving an e-mail.
FIG. 11 is a diagram illustrating a configuration example of a wireless communication system.
FIG. 12 is a diagram showing an example of the flow of electronic mail communication from the communication terminal device.
FIG. 13 is a diagram showing an example of e-mail transmission between bases.
FIG. 14 is a diagram showing a configuration example of a radio communication system according to an embodiment of the present invention.
FIG. 15 is a diagram showing an example of a wireless information file.
FIG. 16 is a diagram showing an example of a wireless device usage status file.
FIG. 17 is a diagram showing an example of a radio name selection screen of the communication terminal device (voice communication).
FIG. 18 is a diagram showing an example of a radio name selection screen of the communication terminal device (e-mail).
FIG. 19 is a diagram showing an example of a destination group information file.
FIG. 20 is a diagram showing an example of the flow of email communication from the communication terminal device.
FIG. 21 is a diagram illustrating a configuration example of a wireless communication system.
FIG. 22 is a diagram showing an example of the flow of electronic mail communication from the communication terminal device.

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

(First embodiment)
FIG. 1 shows a configuration example of a radio communication system according to an embodiment of the present invention.
The wireless communication system of this example is an example of a management terminal device 1, a mail server 2, a communication software server 3, a software wireless device 4, a plurality of communication terminal devices A1 to A3, and a network connecting them. And a power amplifier 5 and an antenna 6 provided in the software defined radio 4.
The management terminal device 1 stores a wireless information file 11, a wireless device usage status file 12, and a terminal information file 13 in a memory.
The mail server 2 stores a DNS record 21 including an A (Address) record 22 and a modified MX (Mail eXchange) record 23 in a memory, and has a function of storing an electronic mail file 24 in the memory. .
The communication software server 3 has a wireless gateway function. As this function, the communication software server 3 has a function of storing an e-mail file 32 in a memory, and also includes a modified A (Address) record 34 and MX (Mail eXchange). ) A DNS record 33 consisting of records 35 is stored in the memory. Further, the communication software server 3 stores communication software B1 to Bn in a memory for each of a plurality of n different functions.
The software defined radio 4 has a function of storing communication software C1 and C2 provided from the communication software server 3 via the LAN 7 in a memory. The software defined radio 4 in this example stores communication software C1 and C2 for two channels (CH).
Each communication terminal device A1 to A3 stores terminal programs D1 to D3 in a memory. Examples of the terminal program include a terminal program D1 that executes processing related to electronic mail and a terminal program D2 that executes processing related to voice communication.
The configuration of the wireless communication system of this example will be described in detail.
The management terminal device 1 has a function of creating and storing the wireless information file 11, a function of managing the wireless device usage status file 12, and a function of managing the terminal information file 13.
FIG. 2 shows an example of the information content of the wireless information file 11.
In the wireless information file 11 of this example, a wireless name, an operation method used in the wireless communication system, a band to be used, a frequency to be used, and a modulation method to be used are stored in association with each other. The operation method is information used when starting the communication software C1 and C2 necessary when communicating with the software defined radio 4. The wireless name is a name arbitrarily given by the input person for each combination of “operation method, band, frequency, modulation method” and the like.
FIG. 3 shows an example of the information content of the wireless device usage status file 12.
In the wireless device usage status file 12 of this example, the software wireless device number, the channel number (CH number), the set wireless name, and the usage status are stored in association with each other.
For example, the radio name “HF-A1” is set in the CH number “1” of the software defined radio 4 having the software defined radio number “1-1”, and the mail server A (mail server 2). Has been granted permission to use. Further, the radio name “VHF-B2” is set in the CH number “2” of the software defined radio 4 having the software defined radio number “1-1”, and the communication terminal apparatus A2 is permitted to use it. The situation is given.
The terminal information file 13 stores information related to the communication terminal apparatuses A1 to A3.
In response to an instruction from the management terminal device 1, the software defined radio 4 acquires (downloads) the communication software C1 and C2 necessary for the function of the radio from the communication software server 3 via the LAN 7 for each channel. By starting the stored communication software C1 and C2, the wireless communication is performed by functioning as a wireless device for each channel.
For example, in FIG. 1, channel 1 (CH1) of software defined radio 4 operates as function A, and channel 2 (CH2) operates as function B. Settings of the band, frequency, and modulation method of the corresponding channel are set in the wireless information file 11.
The software defined radio 4 outputs a signal to be transmitted to the power amplifier 5, amplifies the signal by the power amplifier 5, transmits the signal wirelessly from the antenna 6, and receives the signal wirelessly received by the antenna 6 as a power amplifier 5 to input.
Each communication terminal device A1 to A3 functions in accordance with terminal programs D1 to D3 that are operated on the communication terminal device.
In the communication terminal device A1, a terminal program D1 having an electronic mail transmission / reception function is operated to perform processing for transmitting / receiving electronic mail to / from the mail server 2.
In the communication terminal device A2, the terminal program D2 having a voice communication function is operated to perform processing for transmitting and receiving voice data. As a specific example, in the communication terminal device A2, the contents of the terminal information file 13 received from the management terminal device 1 via the LAN 7 are displayed as a selection screen, and a radio name to be used is selected by a person (user) or automatically. Then, by transmitting / receiving audio data to / from the corresponding channel (selected one) of the software defined radio 4 via the LAN 7, it functions as an audio communication terminal. In this example, the message (voice data) on the LAN 7 is in the form of Internet telephone (VoIP: Voice over IP), but the software radio 4 converts the voice from VoIP to analog voice and sends it to the radio space. Communication with a radio that handles analog audio is possible.
The mail server 2 has a function of receiving electronic mail from the communication terminal apparatuses A1 to A3, a function of transmitting electronic mail to the communication terminal apparatuses A1 to A3, a function of transmitting electronic mail to another base, It has a function to receive e-mails from other locations.
The function of receiving e-mails from the communication terminal devices A1 to A3 receives e-mails created by the communication terminal devices A1 to A3. As the application protocol, for example, general SMTP can be used.
In the function of transmitting e-mails to the communication terminal devices A1 to A3, in response to requests from the communication terminal devices A1 to A3, e-mails addressed to the corresponding users are transmitted to the communication terminal devices A1 to A3. As an application protocol, for example, a general POP (Post Office Protocol) can be used.
In the function of transmitting an e-mail to another base, for example, an e-mail to another base is transmitted to the communication software server 3 based on the contents of the DNS record 21. In some cases, an e-mail may be transmitted via the software radio 4 to a mail server serving as a next transfer destination installed at another site without using the communication software server 3. As the application protocol, for example, general SMTP can be used.
In the function of receiving an e-mail from another base, for example, an e-mail transmitted from a mail server installed at another base is received from the communication software server 3 and stored. In some cases, an e-mail transmitted from a mail server installed at another base is received and stored without using the communication software server 3. As the application protocol, for example, general SMTP can be used.
FIG. 4 shows an example of the information content of the A record 22 stored as the DNS record 21 in the mail server 2.
In the A record 22, the server name and the IP address are stored in association with each other. By referring to the A record 22, it is possible to search the server IP address from the server name. In the example of FIG. 4, the IP address of the mail server B corresponding to the server name “MSERVER-B”, the IP address of the mail server C corresponding to the server name “MSERVER-C”, and the server name “SOFT-SERVER”. The IP address of the communication software server 3 corresponding to the above can be searched.
FIG. 7 shows an example of information content of the revised MX record 23 stored as the DNS record 21 in the mail server 2.
In the revised MX record 23, the domain name and the name of the mail server that is the next transfer destination (next transfer mail server name) are stored in association with each other. In the example of FIG. 7, the name “SOFT-SERVER” of the communication software server 3 is set as the next transfer mail server name corresponding to the destination domain name of the electronic mail such as “SERVER-B” or “SERVER-C”. The name “MSERVER-D” of the destination mail server D is set as the next transfer mail server name corresponding to the destination domain name of the electronic mail such as “SERVER-D”.
In the mail server 2, referring to the revised MX record 23, for example, when the destination domain name of the email is “SERVER-B” or “SERVER-C”, the email is transmitted to the software server 3. To do. Further, for example, when the destination domain name of the e-mail is “SERVER-D”, the e-mail is sent to the software defined radio 4 by a method similar to the conventional one without using the communication software server 3. Send through.
As described above, in the mail server 2 of this example, for example, when the destination domain names of e-mails are “SERVER-B” and “SERVER-C”, two mails are conventionally sent via the software defined radio 4. However, only one e-mail is transmitted to the communication software server 3.
The revised MX record 23 can also be obtained, for example, by rewriting the next transfer mail server name in the MX record 35 shown in FIG. In this example, “SERVER-B” and “SERVER-C” are rewritten from the destination server name to another server name (name of the communication software server 3). In this case, in this example, the name of the next transfer mail server being rewritten is one type, but a plurality of types of rewriting may be performed.
In the communication software server 3, for example, compared with the communication software server 52 shown in FIG. 11, a wireless gateway function 31 is added.
The wireless gateway function 31 has a function of storing an e-mail in the communication software server 3, a process of transmitting / receiving e-mail to / from the mail server 2, and a wireless transmission of the e-mail via the software radio 4. The process of transmitting / receiving is performed.
FIG. 6 shows an example of the information content of the revised A record 34.
In the revised A record 34, the server name and the IP address of the software defined radio are stored in association with each other. In the example of FIG. 6, the IP address “192.168.XXX.151” of the channel 1 (CH1) of the software defined radio 4 corresponding to the server name “MSERVER-B” and the server name “MSERVER-C”. Is set.
The revised A record 34 can also be obtained, for example, by rewriting the A record 22 shown in FIG.
FIG. 5 shows an example of information content of the MX record 35.
In the MX record 35, the domain name and the name of the mail server that is the next transfer destination (next transfer mail server name) are stored in association with each other. In the example of FIG. 5, “MSERVER-”, which is the name of the destination mail servers B and C, is used as the next transfer mail server name corresponding to the destination domain name of the e-mail such as “SERVER-B” or “SERVER-C”. B "and" MSERVER-C "are set.
By referring to the MX record 35, the name of the mail server to be transferred next can be searched from the domain name attached to the e-mail destination. For example, when the destination of the e-mail is “BBB@SERVER-B.xxx.xxx” and the domain name is “SERVER-B”, the mail server name to be transferred next is “MSERVER-B”. .
Using the wireless gateway function 31, the communication software server 3 transmits an e-mail via the software radio 4, for example.
Specifically, when the communication software server 3 receives an e-mail from the mail server 2, the communication software server 3 refers to the contents of the revised A record 34 and uses software corresponding to the server name of the e-mail destination. The IP address of the wearable radio 4 is acquired, and the electronic mail is transmitted to the software defined radio 4 corresponding to the acquired IP address. In this case, if the IP address of the software defined radio 4 to be used is the same even if the server name of the e-mail is different, the e-mail from the communication software server 3 should be sent once. I made it.
Information for discarding an electronic mail received at a location that does not correspond to the destination is added by, for example, the communication software server 3 or the software defined radio 4 as the transmission source.
Further, in this example, the wireless gateway function 31 is provided in the communication software server 3, but for example, another apparatus may be provided with the wireless gateway function.
FIG. 8 shows an example of a communication flow in the case where an electronic mail is created by the communication terminal device A1 existing at the base A and the destination is the base B and the base C.
(1) An electronic mail is created by the communication terminal device A1, and the destination exists at the BBB (BBB@SERVER-B.xxx.xxx) and the C base corresponding to the mail server B of the wireless communication system existing at the B base. CCC (CCC@SERVER-C.xxx.xxx) corresponding to the mail server C of the wireless communication system is set (process T1).
(2) An electronic mail transmission operation is performed in the communication terminal device A1.
(3) An electronic mail is transmitted from the communication terminal device A1 to the mail server A (mail server 2) (process T2).
(4) Based on the contents of the revised MX record 23, the mail server A recognizes that the next transfer mail server name corresponding to the destination BBB and the destination CCC of the received electronic mail is “SOFT-SERVER”.
(5) Next, the mail server A acquires the IP address “192.168..XXX.101” of the server name “SOFT-SERVER” based on the content of the A record 22 and performs communication corresponding to the 1P address. The received electronic mail is transmitted to the software server A (communication software server 3) (process T3).
(6) Based on the content of the MX record 35, the communication software server A confirms that the next transfer mail server name corresponding to the destination domain name “SERVER-B” of the received e-mail is “MSERVER-B”. recognize.
(7) Next, the communication software server A, based on the contents of the revised A code 34, sends the IP address (first address) of the software defined radio 4 used to send an e-mail to the server name “MSERVER-B”. In the example of FIG. 6, “SR1-CH1”) is acquired.
(8) In the same manner as in the above (6) and (7), the communication software server A uses the software defined radio 4 used to send an e-mail to another destination domain name “SERVER-C”. IP address ("SR1-CH1" in the example of FIG. 6) is acquired.
(9) Then, the communication software server A sends the software radios 4 at the base B and the base C via the software radio 4 (in this example, channel 1) corresponding to the acquired IP address. One e-mail received from the mail server 2 is transmitted (process T4).
(10) The software defined radio 4 (channel 1 in this example) wirelessly transmits one e-mail input from the communication software server A via the power amplifier 5 and the antenna 6 (process T5). .
FIG. 9 shows an example of the state of e-mail transmission between bases as described above.
In this example, one e-mail is transmitted by radio from the software defined radio 4 of the radio communication system 41 installed at the site A, and this e-mail is software radio of the radio communication system 42 installed at the site B. And the software radio of the radio communication system 43 installed at the base C. The wireless communication systems 42 and 43 of these bases B and C recognize that the received mails are addressed to their mail servers B and C, and process them. Note that, in the wireless communication system of the base that has received the electronic mail that is not addressed to itself, for example, the received electronic mail is discarded.
Next, an e-mail transmission confirmation function will be described.
For example, in e-mail transmission in which communication between bases is one-to-one, the sender may confirm that the transmitted e-mail has arrived at the destination base by using application protocol SMTP or the like. it can.
On the other hand, in this example, since there is a one-to-many communication between bases, an e-mail transmission confirmation function corresponding to this is provided.
Specifically, the communication software server 3 has a function of transmitting an e-mail reception completion notification to the communication software server of the transmission source when an e-mail is received. The communication software server or mail server of the transmission source can confirm that the electronic mail has arrived at the base of the transmission destination by receiving the reception completion notification from the transmission destination. In addition, in this example, in order to prevent the reception completion notification from being simultaneously transmitted from a plurality of bases as transmission destinations, a function of transmitting a reception completion notification from each base after a waiting time corresponding to a random number has been provided. It was.
In FIG. 10, the software defined radio B of the wireless communication system existing at the base B receives the electronic mail from the other base A, and stores the received electronic mail in the communication software server B of the base B. An example of the communication flow at the time is shown.
(1) The software defined radio B receives e-mail data on channel 1 (CH1), for example.
(2) Next, the software defined radio B transmits the received data to the communication software server B (process T11).
(3) The communication software server B that has received the e-mail generates a random waiting time by a random number, and after the generated waiting time has elapsed, the channel (CH of the software defined radio that has received the e-mail ), A reception completion notification is transmitted to the communication software server A or the mail server A of the transmission base A (process T12).
(4) Next, the communication software server B transmits the received electronic mail to the mail server B (process T13).
(5) Moreover, the communication software server B preserve | saves the received e-mail addressed to self, and transmits the preservation | save content to the said communication terminal device A1-A3 according to the request | requirement from communication terminal device A1-A3.
As described above, in the wireless communication system of the present example, the communication terminal apparatuses A1 to A3 transmit the same electronic mail in a configuration in which transmission and reception of electronic mail and voice communication are performed using the channel of the software defined radio 4. In some cases, an e-mail to a plurality of locations can be transmitted to the plurality of locations by one transmission. For example, in the present example, one e-mail is sent to two e-mails addressed to two different places, compared to the case where two e-mails are sent from a mail server via a software radio as in the past. Only is transmitted, and the processing efficiency can be improved.
Further, in the wireless communication system of this example, even when e-mails are transmitted to a plurality of places by one transmission as described above, whether or not the e-mails have arrived at each destination is returned in a random time. This can be confirmed by a reception completion notification.

(Second embodiment)
FIG. 14 shows a configuration example of a radio communication system according to an embodiment of the present invention.
The wireless communication system of this example is an example of a management terminal device 101, a mail server 102, a communication software server 103, a software radio 104, a plurality of communication terminal devices A11 to A1m, and a network connecting them. And a power amplifier 105 and an antenna 106 provided in the software defined radio 104.
The management terminal device 101 stores a wireless information file 111, a wireless device usage status file 112, and a terminal information file 113 in a memory.
The mail server 102 has a radio name selection function 121, stores destination group information 122 in a memory, and has a function of storing an e-mail file 123 in a memory.
The communication software server 103 stores communication software E1 to En in a memory for each of a plurality of n different functions.
The software defined radio 104 has a function of storing communication software C11 and C12 provided from the communication software server 103 via the LAN 107 in a memory. The software defined radio 104 in this example stores communication software C11 and C12 for two channels (CH).
Each of the communication terminal devices A11 to A1m stores terminal programs F1 to Fm in a memory. Examples of the terminal program include terminal programs F1 and F2 that execute processing related to electronic mail, and a terminal program Fm that executes processing related to voice communication.
The configuration of the wireless communication system of this example will be described in detail.
The management terminal device 101 has a function of creating and saving the wireless information file 111, a function of managing the wireless device usage status file 112, and a function of managing the terminal information file 113.
FIG. 15 shows an example of the information content of the wireless information file 111.
In the wireless information file 111 of this example, a wireless name, an operation method used in the wireless communication system, a band to be used, a frequency to be used, and a modulation method to be used are stored in association with each other. The operation method is information used when starting the communication software C11 and C12 necessary when communicating with the software defined radio 104. The wireless name is a name arbitrarily given by the input person for each combination of “operation method, band, frequency, modulation method” and the like.
FIG. 16 shows an example of information contents of the wireless device usage status file 112.
In the wireless device usage status file 112 of this example, a software wireless device number, a channel number (CH number), a set wireless name, and a terminal usage status are stored in association with each other.
For example, the radio name “mail A1” is set in the CH number “1” of the software defined radio 104 having the software defined radio number “1-1”, and the mail server A (mail server 102) The license is granted. In addition, the radio name “voice B2” is set in the CH number “2” of the software defined radio 104 having the software defined radio number “1-1”, and the use permission is given to the communication terminal device A13. It has become a situation.
The terminal information file 113 stores information regarding each of the communication terminal devices A11 to A1m.
The software defined radio 104 acquires (downloads) the communication software C11 and C12 necessary for the function of the radio from the communication software server 103 via the LAN 107 for each channel in response to an instruction from the management terminal device 101. By starting the stored communication software C11 and C12, each channel functions as a wireless device to perform wireless communication.
For example, in FIG. 21, channel 1 (CH1) of software defined radio 133 operates as the operation method “mail A1”, and channel 2 (CH2) operates as the operation method “voice B2”. In FIG. 14, channel 1 (CH1) of software defined radio 104 operates as the operation method “mail A1”, and channel 2 (CH2) operates as the operation method “mail A2”. Settings of the band, frequency, and modulation method of the corresponding channel are set in the wireless information file 111.
The software defined radio 104 outputs a signal to be transmitted to the power amplifier 105, amplifies the signal by the power amplifier 105, transmits the signal wirelessly from the antenna 106, and a signal wirelessly received by the antenna 106 is a power amplifier. Input via 105.
Each of the communication terminal devices A11 to A1m functions according to terminal programs F1 to Fm that are operated on the communication terminal device.
In the communication terminal device A1m, the terminal program Fm having a voice communication function is operated to perform processing for transmitting and receiving voice data. As a specific example, in the communication terminal device A1m, the contents of the terminal information file 113 received from the management terminal device 101 via the LAN 107 are displayed as a selection screen, and a wireless name used automatically by a person (user) is selected. Then, by transmitting / receiving audio data to / from the corresponding channel (selected one) of the software defined radio 104 via the LAN 107, it functions as an audio communication terminal.
FIG. 17 shows an example of a radio name selection screen (contents of the terminal information file 113) regarding voice communication in the communication terminal device A1m. This screen shows the correspondence between the wireless name and the usage status. The wireless name indicated as “used” as the usage status is currently operating on the software defined radio 104, and the radio name indicated as “available” as the usage status is indicated to the software defined radio 104. It can be set.
The communication terminal devices A11 and A12 have an e-mail creation function, a radio name selection function used for transmission, a transmission operation function, a received e-mail display function, and the like.
In the communication terminal devices A11 and A12, terminal programs F1 and F2 having an electronic mail transmission / reception function are operated to perform processing for transmitting and receiving electronic mail to and from the mail server 102, and the like. As a specific example, in the communication terminal devices A11 and A12, the contents of the terminal information file 113 received from the management terminal device 101 via the LAN 107 are displayed as a selection screen, and a radio name used by a person (user) or automatically. Is selected and functions as an e-mail communication terminal by transmitting / receiving e-mail data to / from the corresponding channel (selected one) of the software defined radio 104 via the LAN 107.
FIG. 18 shows an example of a radio name selection screen (contents of the terminal information file 113) related to electronic mail communication in the communication terminal devices A11 and A12. On this screen, the wireless name is displayed.
The mail server 102 has a function of receiving e-mails from the communication terminal apparatuses A11 to A1m, a function of transmitting e-mails to the communication terminal apparatuses A11 to A1m, a function of transmitting e-mails to another base, It has a function to receive e-mails from other locations.
The function of receiving e-mails from the communication terminal devices A11 to A1m receives e-mails created by the communication terminal devices A11 to A1m. As the application protocol, for example, general SMTP can be used.
In the function of transmitting e-mails to the communication terminal devices A11 to A1m, the e-mail addressed to the corresponding user is transmitted to the communication terminal devices A11 to A1m in response to requests from the communication terminal devices A11 to A1m. As the application protocol, for example, a general POP can be used.
In the function of transmitting an e-mail to another site, the e-mail is transmitted via the software defined radio 104 to a mail server that is a next transfer destination installed in another site. As the application protocol, for example, general SMTP can be used.
In the function of receiving an e-mail from another base, for example, an e-mail transmitted from a mail server installed in another base is received and stored. As the application protocol, for example, general SMTP can be used.
The mail server 102 stores and stores the destination group information 122.
FIG. 19 shows an example of the contents of the destination group information 122 file. In the destination group information 122, the correspondence between the wireless name and the destination group number is stored.
As described above, in this example, the wireless names used in the e-mail are grouped according to the transmission destination. In the example of FIG. 19, the wireless name “mail A1” and the wireless name “mail A2” are assigned to group (destination group number) 1, and the wireless name “mail C1” is assigned to group (destination group number) 2. is there.
If the destination can be determined by the operation method, the operation methods can be similarly grouped.
In addition, the mail server 102 is selected by the communication terminal devices A11 to A1m based on the destination group information 122 when the wireless name selected by the communication terminal devices A11 to A1m is already in use for email transmission. It has a function of searching for and using another wireless name belonging to the same group as the wireless name. As a result, the mail server 102 can select another wireless name that can be transmitted to the same destination even when the wireless name selected by the communication terminal devices A11 to A1m is in use. By sending an e-mail to the software defined radio 104 corresponding to another radio name, it is possible to send an e-mail using an available radio channel.
FIG. 20 shows an example of a communication flow in the case where an electronic mail is transmitted from the communication terminal devices A11 and A12.
(1) The electronic mail 1 is created by the communication terminal device A11, and “mail A1” is selected from the wireless names capable of electronic mail transmission, and a transmission operation is performed (process T101).
(2) The electronic mail 1 is transmitted from the communication terminal device A11 to the mail server A.
(3) The mail server A transmits the e-mail 1 to the mail server installed at another base via the software defined radio 1-1.
(4) Further, the communication terminal device A12 creates the email 2 and selects “mail A1” from the wireless names capable of sending email, and performs a transmission operation (process T102).
(5) The e-mail 2 is transmitted from the communication terminal device A12 to the mail server A.
(6) When the software defined radio 1-1 is transmitting the email 1 with the radio name “mail A1”, the mail server A uses the radio name “mail” from the registered contents of the destination group information 122. Search for other wireless names belonging to the same group as “A1”.
(7) Then, the mail server A transmits the e-mail 2 to the software defined radio 1-2 in which another radio name “mail A2” belonging to the same group as the radio name “mail A1” is set. The software defined radios 1-1 and 1-2 transmit a transmission completion notification indicating that to the mail server A when the transmission of the respective emails 1 and 2 is completed.
Here, in this example, the software defined radio 1-1 and the software defined radio 1-2 are different radios. For example, these may be the same radio, that is, the same radio Different radio channels may be assigned to the same group and used.
As described above, in the wireless communication system of this example, the communication terminal apparatuses A11 to A1m transmit a plurality of electronic mails in a configuration in which transmission / reception of electronic mails and voice communication are performed using the channel of the software defined radio 104. In this case, when the channels of the wireless devices that are desired to be used overlap, it is possible to smoothly transmit an e-mail by selecting an available wireless channel that can be used instead. For example, it is possible to prevent occurrence of a channel of a wireless device that is not used wastefully when transmitting a plurality of e-mails, and it is possible to effectively use an empty channel of the wireless device.
Here, the configurations of the wireless communication system and each device according to the present invention are not necessarily limited to those described above, and various configurations may be used. The present invention can also be provided as, for example, a method or method for executing the processing according to the present invention, a program for realizing such a method or method, or a recording medium for recording the program. It is also possible to provide various devices and systems.
The application field of the present invention is not necessarily limited to the above-described fields, and the present invention can be applied to various fields.
In addition, as various types of processing performed in the wireless communication system and each device according to the present invention, for example, the processor executes a control program stored in a ROM (Read Only Memory) in hardware resources including a processor and a memory. The configuration controlled by doing so may be used, and for example, each functional means for executing the processing may be configured as an independent hardware circuit.
Further, the present invention can be grasped as a computer-readable recording medium such as a floppy (registered trademark) disk or a CD (Compact Disc) -ROM storing the control program, or the program (itself). The processing according to the present invention can be performed by inputting the program from the recording medium to the computer and causing the processor to execute the program.

As described above, according to the wireless communication system according to the present invention, when the mail data generated by the communication terminal device is wirelessly transmitted from the wireless device via the mail server, for example, the setting contents (memory of the mail server and the communication unit) Depending on the content, even if the mail data is addressed to a plurality of different destinations, one mail data is collectively sent from the mail server to the communication unit for the plurality of destinations. One mail data is collectively transmitted from a communication unit to a wireless device for a plurality of destinations, and one mail data is collectively transmitted from the wireless device to the same mail data for the plurality of destinations. Can be sent to multiple destinations in a single transmission.
Also, according to the wireless communication system of the present invention, when a channel designated for wirelessly transmitting mail data is being used by a wireless device, another channel associated with the same destination is searched. Then, since the mail data is wirelessly transmitted from the wireless device using the other channel, for example, when transmitting a plurality of mail data, even when the designated channels overlap, By transmitting mail data using an empty channel of a wireless device, smooth transmission of mail data can be realized by effectively using an empty channel.

Claims (2)

In a wireless communication system that wirelessly transmits mail data generated by a communication terminal device from a software defined radio via a mail server,
A communication unit that communicates mail data between the mail server and the software defined radio,
The communication terminal device generates mail data having destination information addressed to a device of one or more other systems connected via wireless communication by the software defined radio, and the generated Means for transmitting mail data to the mail server;
The mail server includes means for storing correspondence between destination information and a transfer destination, means for receiving mail data from the communication terminal device, and destination information of the received mail data based on the stored contents. When the communication unit is stored as a transfer destination corresponding to the mail address, the mail data is transmitted to the communication unit, and the destination information of the mail data generated by the communication terminal device is a plurality of different system devices. Even when the destination information is included, when it is stored that the transfer destination corresponding to each of the plurality of destination information is the communication unit, only one piece of mail data is stored for the plurality of destination information. Having means to transmit to
The communication unit has means for receiving mail data from the mail server, and means for transmitting the received mail data to the software defined radio,
The software defined radio has means for receiving mail data from the communication unit, and means for wirelessly transmitting the received mail data.
It is characterized by
Even when the destination information of the mail data generated by the communication terminal device includes the destination information of a plurality of devices of different systems, it is stored that the transfer destination corresponding to each of the plurality of destination information is the communication unit. A wireless communication system that wirelessly transmits the same mail data to a plurality of different system devices in one transmission. In the wireless communication system according to claim 1,
Means for generating mail data; means for specifying channel identification information for identifying a channel used for wirelessly transmitting mail data to an apparatus of another system by the software defined radio; And means for transmitting the generated mail data and the designated channel identification information to the mail server,
The mail server is configured to store a correspondence between channel identification information and a transmission destination, a means to receive mail data and channel identification information from the communication terminal device, and the received based on the stored contents. When the channel identified by the channel identification information is not used by the corresponding software defined radio, the mail data is transmitted to the corresponding software defined radio so that the corresponding channel is used, while the received data is received. If the channel identified by the identified channel identification information is being used by the corresponding software defined radio, search for other channel identification information associated with the same transmission destination as the channel identification information and perform the retrieval. To the corresponding software defined radio so that the channel identified by the identified channel identification information is used. And means for transmitting the Rudeta,
The software defined radio has means for receiving mail data from the mail server, and means for wirelessly transmitting the received mail data using a channel.
A wireless communication system.

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