WO2011021667A1

WO2011021667A1 - Communication system, server, terminal device, program, and method for controlling band to be used in communication

Info

Publication number: WO2011021667A1
Application number: PCT/JP2010/064007
Authority: WO
Inventors: 大金友
Original assignee: 日本電気株式会社
Priority date: 2009-08-20
Filing date: 2010-08-19
Publication date: 2011-02-24
Also published as: JP5838811B2; JPWO2011021667A1

Abstract

Provided is a communication system, wherein appropriate band control is conducted without affecting the quality of the communication being executed. The communication system comprises: an information exchange server that exchanges transmission/reception band information, among a plurality of terminal devices grouped together based on the individual locations of the terminal devices; and the terminal devices that exchange transmission/reception band information via the aforementioned information exchange server, and control the band to be used in communication with other terminal devices, based on the received transmission/reception band information.

Description

COMMUNICATION SYSTEM, SERVER, TERMINAL DEVICE, PROGRAM, AND COMMUNICATION USED BAND CONTROL METHOD

(Description of related applications)
The present invention is based on the priority claim of Japanese patent application: Japanese Patent Application No. 2009-191081 (filed on Aug. 20, 2009), the entire contents of which are incorporated herein by reference. Shall.

The present invention relates to a communication system, a server (information exchange server), a terminal device, a program, and a communication use bandwidth control method, and more particularly to a quality deterioration prevention technique for the communication.

In multimedia communication that uses video and data sharing in addition to calls, if data is transmitted beyond the available network bandwidth, data loss occurs during communication, and the quality of communication deteriorates.

In particular, when multimedia communication is performed via a wireless network, the available bandwidth varies due to variations in the number of simultaneous communication terminals due to the quality of the wireless link and the movement of the terminals, resulting in communication quality degradation. Cheap.

In order to solve this problem, it is considered to estimate the available bandwidth in advance and then transmit data so as to fit within the bandwidth.

Non-Patent Document 1 is an example of a technique for estimating the available bandwidth, and proposes a method for estimating the available bandwidth by continuously transmitting packets for measurement and measuring the arrival status on the receiving side. is doing. Specifically, in Non-Patent Document 1, it is possible to continuously transmit while narrowing the transmission interval of a measurement packet called a probe packet, and detect and use the timing at which the packet delay is increased on the receiving side. Estimating the bandwidth.

Also, it is considered to prevent the deterioration of communication quality by permitting the start of communication only when the radio wave condition and the number of terminals communicating simultaneously satisfy a certain condition. The technology of Patent Document 1 is an example of this, and in the VoIP (Voice over Internet Protocol) service using wireless, only when the number of terminals that simultaneously use wireless access points is below the threshold and the radio field intensity measured by the terminal is above the threshold An access control method for permitting the start of communication is disclosed.

JP 2009-21973 A

The following analysis is given by the present invention. The entire disclosure of the above patent documents and non-patent documents is incorporated herein by reference.

However, the method of estimating the bandwidth used by transmitting probe packets represented by Non-Patent Document 1 described above has a problem in that it affects the quality of communication being performed. The reason is to generate a state where the available bandwidth is temporarily used up by continuous packet transmission for measurement.

Also, the access control method disclosed in Patent Document 1 has a problem in that the expected performance cannot be exhibited in communication using different bandwidths for individual communication such as multimedia communication. The reason for this is that in multimedia communication, the bandwidth used for each communication is different, so it is not sufficient to restrict access based on the number of simultaneous communication terminals and radio wave conditions. Depending on the settings, data transmission that exceeds the above-mentioned available bandwidth This is because the possibility of trying to do this cannot be excluded.

The present invention has been made in view of the above-described circumstances, and includes a communication system, a server, a terminal device, a program, and a communication use bandwidth control that perform appropriate bandwidth control without affecting the quality of communication being executed. It is to provide a method.

According to the first aspect of the present invention, an information exchange server for exchanging transmission / reception band information among a plurality of terminal apparatuses grouped based on the position of each terminal apparatus, and a transmission / reception band via the information exchange server There is provided a communication system including a terminal device that exchanges information and controls a use band used for communication with another terminal device based on received transmission / reception band information.

According to a second aspect of the present invention, an information exchange server and a terminal device that constitute the communication system are provided.

According to a third aspect of the present invention, the terminal device notifies the information exchange server of the position of the terminal device and the transmission / reception bandwidth in the communication being executed by the terminal device, and the information exchange The server groups the terminal devices based on the notified terminal device positions, and the information exchange server notifies the terminal devices belonging to the same group of the transmission / reception band information notified from one terminal device. And a step of controlling the bandwidth used by the terminal device for communication with other terminal devices based on the notified transmission / reception bandwidth information. This method is associated with specific machines, that is, an information exchange server and a terminal device.

According to the fourth aspect of the present invention, a program to be executed by the information exchange server and the terminal device is provided. This program can be recorded on a computer-readable storage medium. That is, the present invention can be embodied as a computer program product.

According to the present invention, it is possible to prevent deterioration of communication quality without affecting the quality of communication being executed. The reason is that instead of transmitting a probe packet to estimate the available bandwidth, the terminal devices are grouped based on the position of each terminal device, and transmission / reception bandwidth information is exchanged between the terminal devices belonging to the same group. In this configuration, the transmission / reception bandwidth is controlled.

It is a figure for demonstrating the outline | summary of this invention. It is a block diagram showing the structure of the 1st Embodiment of this invention. It is a flowchart showing the flow of the update process of the group of the terminal device of the 1st Embodiment of this invention. It is a flowchart showing the flow of the notification process of the transmission / reception band information of the 1st Embodiment of this invention. It is a block diagram showing the structure of the 2nd Embodiment of this invention. It is a flowchart showing the flow of the notification process of the transmission-and-reception band information of the 2nd Embodiment of this invention. It is a flowchart showing the flow of the inquiry process of the transmission-and-reception band information of the 2nd Embodiment of this invention. It is an example of the network which can apply this invention. It is a figure for demonstrating the information preserve | saved at the information exchange group preservation | save part of the 2nd Embodiment of this invention.

Subsequently, the outline of the present invention will be described. The communication system of the present invention is realized by a plurality of terminal devices 1A to 1C and an information exchange server 2 as shown in FIG. Each of the terminal devices 1A to 1C has a function of notifying the information exchange server 2 of the position of its own device (position notification unit) and a function of measuring the transmission / reception bandwidth during communication and notifying the information exchange server 2 ( Based on the transmission / reception band information received from the information exchange server 2 and a function (band control unit) for controlling the transmission / reception band used for communication. Note that the reference numerals of the drawings attached to this summary are attached to the respective elements for convenience as an example for facilitating understanding, and are not intended to limit the present invention to the illustrated embodiment.

The information exchange server 2 groups the terminal devices based on predetermined criteria such as close positions to each other and equal distances from the base station based on the positions of the individual terminal devices notified from the terminal devices. Transmission / reception band information is shared by at least terminal devices belonging to the same group. Here, it is assumed that the terminal apparatuses 1A to 1C in FIG. 1 belong to the same group. Here, for example, when receiving transmission / reception band information from one terminal device (for example, 1A in FIG. 1), the information exchange server 2 sends the transmission / reception band information to other terminal devices (for example, 1B and 1C in FIG. 1). Send. Other terminal devices (for example, 1B and 1C in FIG. 1) control the transmission / reception band used by the own device for communication so that communication quality degradation does not occur based on the transferred transmission / reception band information.

As described above, without transmitting a large amount of packets such as probe packets to the network side, it becomes possible for each terminal device to grasp the available bandwidth and perform appropriate transmission / reception bandwidth control.

[First Embodiment]
Next, a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 2 is a block diagram showing the configuration of the first exemplary embodiment of the present invention. Referring to FIG. 1, the communication system according to the first embodiment of the present invention includes a plurality of terminal devices 1A to 1C and one information exchange server 2. Although the example of FIG. 1 shows three terminal devices, the number of terminal devices is not particularly limited.

Each of the terminal devices 1A to 1C includes the data processing device 11, and includes a position measuring unit 111, a band control unit 112, a use band measuring unit 113, and a communication application (AP) 114. Note that the position measurement unit 111, the band control unit 112, the use band measurement unit 113, and the communication application (AP) 114 can be realized by a program that causes a computer that configures the data processing apparatus 11 to execute processes described later.

The information exchange server 2 includes a data processing device 21 and a storage device 22, and includes a location information update unit 211, a group update unit 212, and a use band information notification unit 213. In addition, the storage device 22 is provided with a location information storage unit 221, an information exchange group storage unit 222, and a base station information storage unit 223.

Subsequently, each part of the terminal devices 1A to 1C will be described. The communication AP 114 is an application program for providing a multimedia communication function between the terminal devices 1A to 1C. In the present embodiment, the terminal apparatuses 1A to 1C are described as communicating via a base station, an access point, or the like, but a system in which the terminal apparatuses 1A to 1C communicate directly may be used. Hereinafter, in the present embodiment, the above-described base station, access point, and the like are referred to as “base stations”.

The used bandwidth measuring unit 113 calculates the transmission / reception bandwidth per unit time by measuring the amount of data transmitted / received by the communication AP 114 and notifies the used bandwidth information notifying unit 213 of the information exchange server 2.

The position measuring unit 111 measures the positions of the terminal devices 1A to 1C and transmits them to the position information update unit 211 of the information exchange server 2. The position measurement method is arbitrary, such as a method in which the terminal devices 1A to 1C themselves measure using GPS (Global Positioning System) and various sensors, and a method in which the terminal devices 1A to 1C acquire position information of a base station, etc. It is possible to adopt this method.

The bandwidth control unit 112 controls the transmission / reception bandwidth of the communication AP 114 based on the transmission / reception bandwidth information notified from the use bandwidth information notification unit 213 of the information exchange server 2. As a method for controlling the transmission / reception bandwidth, the bandwidth control unit 112 may control the flow rate of transmission / reception data by itself, or the bandwidth control unit 112 may instruct the communication AP 114 to change the transmission / reception flow rate.

Subsequently, each part of the information exchange server 2 will be described. The location information update unit 211 compares the location information notified from the terminal devices 1A to 1C with the location information of each of the terminal devices 1A to 1C previously stored in the location information storage unit 221 and It is determined whether or not the position of 1 is moving. As a result of the determination, when the positions of the terminal devices 1A to 1C are moving, the position information update unit 211 instructs the group update unit 212 to update the group, and also notifies the position information storage unit 221 of the terminal The new position of the device (position after movement) is stored.

Based on the location information of all the terminal devices stored in the location information storage unit 221, the group update unit 212 updates a group of terminal devices that mutually exchange the transmission / reception band information stored in the information exchange group storage unit 222. To do. The group updating unit 212 groups the terminal devices so that terminal devices with similar situations belong to the same group. In the present embodiment, since the terminal devices 1A to 1C are connected to the base station and communicate with each other wirelessly, the terminal devices 1A to 1C stored in the base station information storage unit 223 are directly connected to the base station. Grouping is performed using station information and the like.

For the grouping, various other methods can be used as long as a group considered to be in a similar situation with respect to radio used for communication can be configured. For example, terminal devices located within a certain distance can be grouped. In addition, an area where the terminal device may exist may be divided by a certain rule such as a lattice shape, and the group may be configured by the terminal devices existing in one divided area. Further, in addition to the reference based on the positions of the terminal devices 1A to 1C, the grouping may be performed using the position information of the connected base station and the information of the cover area. In addition, among terminal devices that are wirelessly connected to the same base station, a group may be configured by terminal devices that share resources necessary for communication such as a physical channel. Further, using the distance between the base station and the terminal device, grouping can also be performed by the terminal devices in which the distance between the base station and the terminal device is in a certain range. Furthermore, since it is considered that the quality of wireless communication is improved as it is closer to the base station, it is possible to connect to the same base station and perform grouping based on the criteria of whether or not the terminal device is closer to the base station. Further, grouping may be performed such that one terminal device belongs to a plurality of groups using the plurality of grouping criteria.

Based on the group information stored in the information exchange group storage unit 222, the used band information notification unit 213 uses the same transmission / reception band information notified from one terminal device (for example, the terminal device 1A) as the terminal device 1. To terminal devices (for example, terminal devices 1B and 1C) belonging to the group. As the transmission target of the transmission / reception band information by the use band information notification unit 213, in addition to the group to which the mobile terminal that issued the transmission / reception band information belongs, a plurality of groups that can be estimated to be close in position or similar in situation are included in the transmission / reception band information. It may be a transmission target.

Subsequently, the operation of the present embodiment will be described in detail with reference to FIGS. First, update processing of a group of terminal devices based on position information will be described. Referring to FIG. 3, each of the terminal devices 1A to 1C measures the position of the terminal device 1 by the position measuring unit 21, and transmits it to the information exchange server 2 together with the identifier of the terminal device 1 (steps S11 and S12). Note that the timing of this measurement and transmission may be every fixed time. It may be measured when it is detected that the terminal device 1 has moved by using various sensors. Further, before the step S11, a movement determination process may be added using a GPS or various sensors, and the position measurement process may be started only when the terminal device moves.

When the location information update unit 211 receives the identifier and the location information, the information exchange server 2 compares the received location information with the location information of the terminal device 1 corresponding to the identifier stored in the location information storage unit 221. Thus, it is determined whether or not the terminal device has moved (step S13). If it is determined that the terminal device has moved as a result of the determination, the information exchange server 2 updates the location information of the terminal device stored in the location information storage unit 221 (step S14), and the group update unit 212 Instruct to update the group.

Upon receiving the instruction, the group updating unit 212 updates the group of terminal devices that exchange the transmission / reception band information with each other (step S15).

Subsequently, the transmission / reception band information notification process using the group updated as described above will be described. Referring to FIG. 4, in each of the terminal devices 1A to 1C, the used bandwidth measuring unit 113 measures the transmission / reception bandwidth of the communication AP 114 (step S21), and transmits (notifies) the measurement result together with the identifier of the terminal device 1 to the information exchange server 2. (Step S22).

Measurement and transmission timing may be every fixed time, or when it is detected that the transmission / reception band fluctuates by some method. Further, the value of the transmission / reception band to be notified may be a single value such as the latest measured value, or may be a value having a width such as the maximum value and the minimum value within a certain time.

When the information exchange server 2 receives the identifier and the transmission / reception band information at the use band information notification unit 213, the information exchange server 2 belongs to the same group as the transmission source terminal device based on the group information of the terminal device stored in the information exchange group storage unit 222. The received transmission / reception band information is transmitted to the terminal device (step S23).

Note that when grouping is performed such that one terminal device belongs to a plurality of groups, there are a plurality of information exchange groups to be transmitted.

Upon receiving the transmission / reception band information, the band control unit 112 of the terminal device 1 controls the transmission / reception band of the communication AP 114 based on the content (step S24). If it is determined that the bandwidth control unit 112 is not necessary depending on the received content, the transmission / reception bandwidth of the communication AP 114 may not be controlled. Further, in order to control the reception band of the communication AP 114, it is possible to instruct the communication partner terminal device to control the transmission amount.

As described above, according to the present embodiment, in multimedia communication using radio, it is possible to prevent deterioration in communication quality without affecting the quality of ongoing communication. The reason is that the terminal device does not perform continuous transmission of probe packets for estimation of the available bandwidth, but is selected based on the position information of other terminal devices that have substantially the same transmission / reception bandwidth. This means that the transmission / reception band in multimedia communication is controlled using actual transmission / reception band information.

[Second Embodiment]
Next, a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 5 is a block diagram showing the configuration of the second exemplary embodiment of the present invention. Referring to FIG. 5, a terminal device 3 and an information exchange server 4 are shown. In the example of FIG. 5, one terminal device 3 is shown. However, there are a plurality of terminal devices, and in the present embodiment, the terminal device 3 will be described without particular distinction.

Hereinafter, differences in configuration from the above-described first embodiment will be described. In the terminal device 3 according to the present embodiment, a use band inquiry unit 314 is added to the configuration of the mobile terminal in the first embodiment described above.

Also, the information exchange server 4 of the present embodiment is provided with a use band response unit 414 that responds to an inquiry from the use band inquiry unit 314. In addition, the information exchange server 4 of this embodiment includes a use band information notification unit 413 and a group update unit 412 instead of the use band information notification unit 213 and the group update unit 212 of the first embodiment. Yes. Furthermore, the information exchange server 4 of this embodiment includes an information exchange group storage unit 422 that stores part of the information to be stored differently from the information exchange group storage unit 222 of the first embodiment.

The use band inquiry unit 314 of the terminal device 3 transmits the location information of the terminal device 3 and the identifier of the terminal device 3 measured by the location measurement unit 111 to the information exchange server 2 and is applied by the own device. Queries the transmission bandwidth information to be transmitted.

When the use band response unit 414 of the information exchange server 4 receives the inquiry from the use band inquiry unit 314, the group update unit 412 determines a group to which the terminal device 3 that has made the inquiry belongs, and exchanges information. From the group storage unit 422, the transmission / reception band information that has been notified to the terminal device of the corresponding group is read out, and the terminal device 3 is answered.

The used bandwidth information notification unit 413 notifies the transmission / reception bandwidth information of a certain terminal device 3 to other terminal devices 3 belonging to the same information exchange group, and associates the notified transmission / reception bandwidth information with a notification destination group. Saved in the exchange group saving unit 422. The stored transmission / reception band information is used when the above-described use band response unit 414 responds to an inquiry from the use band inquiry unit 314 of the terminal device 3.

Subsequently, the operation of this embodiment will be described in detail. In the present embodiment, the terminal devices 3 are grouped, but the description is omitted because it is the same as the first embodiment described above.

Subsequently, the transmission / reception band information notification process using the information exchange group will be described with reference to FIG.

Steps S21, S22, S23, and S24 in FIG. 6 are the same as steps S21, S22, S23, and S24 described with reference to FIG. 4 of the first embodiment. In the present embodiment, after transmission / reception band information is transmitted (notified) to the terminal device 3 (step S23), the use band information notification unit 413 associates the information exchange group storage unit 422 with the group to be transmitted, and transmits the information. A process for storing the transmitted / received band information is added (step S31).

The information exchange group storage unit 422 may store only the latest transmission / reception band information, or may store a plurality of transmission / reception band information, such as transmission / reception band information transmitted within a certain number of transmissions or a predetermined time. It may be. The information exchange group storage unit 422 may store the transmission time together with the transmission / reception band information.

Subsequently, referring to FIG. 7, the transmission / reception band information inquiry process will be described. Referring to FIG. 7, the use band inquiry unit 314 of the terminal device 3 is connected to the terminal device 3 measured by the position measurement unit 111. An inquiry about transmission / reception band information including the position information and the identifier of the terminal device 3 is transmitted to the information exchange server 4 (step S41).

When the inquiry is received, the use band response unit 414 of the information exchange server 4 notifies the group update unit 412 of the location information and the identifier received from the terminal device 4 and requests an update of the information exchange group. The group updating unit 412 that has received the request updates the group of terminal devices using the notified location information and the location information from the location information storage unit 221 as in the first embodiment (Step S1). S15). This group update process is the same as step S15 in FIG.

When the group updating unit 412 notifies the use band response unit 414 that the group update is completed, the use band response unit 414 refers to the information exchange group storage unit 422 and includes the group including the identifier of the terminal device 3 that is the inquiry source. And transmission / reception band information transmitted to the information exchange group is acquired. Then, the use band response unit 414 transmits the acquired transmission / reception band information to the inquiring terminal device 3 (step S42).

Here, when the inquiry source terminal device 3 belongs to a plurality of information exchange groups or when a plurality of transmission / reception band information is stored for the information exchange group to which the terminal device 3 belongs, a plurality of transmission / reception band information is transmitted. be able to. When the transmission time of each transmission / reception band information is also stored in the information exchange group storage unit 422, the transmission time can be transmitted together with each transmission / reception band information.

The terminal device 3 that has received the transmission / reception terminal information by the used bandwidth inquiry unit 314 notifies the bandwidth control unit 112 of the received transmission / reception bandwidth information. The control by the transmission / reception band information in the band control unit 112 is the same as step S24 of FIG. 4 described in the first embodiment. Of course, when a plurality of transmission / reception band information is received, and when the transmission time is received together with the transmission / reception band information, the band used for communication can be controlled more finely using these.

As described above, in the present embodiment, in addition to the advantages of the first embodiment, transmission / reception band information transmitted from other terminal devices in a similar situation such as close position when the terminal device 3 is necessary It becomes possible to provide.

Subsequently, in order to describe the operation and effect of the present invention more specifically, a configuration example and a specific example of operation of the communication system corresponding to the above-described second embodiment will be described.

As shown in FIG. 8, a mobile phone connected to the core network via the wireless network is used as the terminal device 3 of the second embodiment described above, and a server device connected to the core network is used as the information exchange server 4. Can do. At this time, the data processing device of the terminal device 3 corresponds to a central processing unit and a memory of a mobile phone. The data processing device of the information exchange server 4 corresponds to a central processing unit and a memory of the server device, and the storage device of the information exchange server 4 corresponds to a hard disk provided in the server device. In either case, each processing function of the data processing device is realized by executing a computer program on the memory by the central processing unit.

In the configuration described above, the communication AP 14 of the terminal device 3 will be described as being provided with a mobile phone videophone function. This videophone function can change the quality of video during a call and can change the bandwidth used from 384 kbps to 3 Mbps. Further, it is assumed that the position measuring unit 111 of the terminal device 3 has a position measuring function using the GPS function of the mobile phone.

A mobile phone that is talking to any other party with the videophone function transmits position information to the server device at a predetermined time interval (for example, every 3 minutes), and receives group update processing as necessary. And In addition, it is assumed that a mobile phone that is talking to an arbitrary party using the videophone function transmits transmission / reception band information to the server device at a predetermined time interval (for example, every minute).

For example, the operation will be described on the assumption that the user of the mobile phone A is talking to an arbitrary partner in the 2 Mbps band with the videophone function while moving in a car. Using the GPS, the cellular phone A acquires position information such as “36 ° 6′2 ″ north latitude, 139 ° 5′28 ″ east longitude”, and transmits it to the server device together with the telephone number 090443317670 which is an identifier (FIG. 3). Steps S11 and S12).

The server device determines that the server has moved because it is different from the previously stored location information (north latitude 36 ° 7′0 ″, east longitude 139 ° 6′15 ″) (Yes in step S13 in FIG. 3), and the telephone number 090443317670. Is updated with “north latitude 36 ° 6′2 ″, east longitude 139 ° 5′28 ″” (step S14 in FIG. 3), and the information exchange group is also updated (step S15 in FIG. 3).

Suppose that the information exchange group here is created for each base station of the wireless communication destination, and is grouped as shown in FIG.

The mobile phone A transmits the transmission / reception bandwidth information with the measured “2 Mbps” to the server device as the transmission / reception bandwidth information (steps S21 and S22 in FIG. 6).

The server device refers to the information stored in the information exchange group storage unit illustrated in FIG. 9, as the current transmission band information for the mobile phone of the group with ID = 1 including the mobile phone with the telephone number 090444845562. “2 Mbps” is transmitted (step S23 in FIG. 6), and “2 Mbps” is stored in association with the information exchange group in the hard disk (step S31 in FIG. 6). In the example of FIG. 9, transmission band information for the past three times is stored.

Such transmission band information is transmitted to the mobile phone of ID = 1 group including the mobile phone having the telephone number 090444845562. Since the mobile phone of 09044485562 that has received 2 Mbps as transmission band information is currently executing a videophone at 2 Mbps, no special control is performed (step S24 in FIG. 6).

Here, let us consider a case where a user of a mobile phone having a phone number 090555556666 different from the phone number 090444845562 starts a videophone call using a mobile phone. This mobile phone also uses GPS to obtain position information such as “36 ° 7′0 ″ north latitude, 139 ° 6′15 ″ east longitude”, and sends it to the server device together with the telephone number 090555556666 as an identifier. An inquiry about transmission / reception band information is performed (step S41 in FIG. 7).

Since the position of the position information “north latitude 36 ° 7′0 ″, east longitude 139 ° 6′15 ″” is within the area of the base station with ID = ACC9500381, the mobile phone with the telephone number 090555556666 has the ID = 1 group (Step S15 in FIG. 7). Therefore, the server device transmits the transmitted bandwidth information “2 Mbps, 1.5 Mbps, 1.8 Mbps” to the group of ID = 1 to the mobile phone of the inquiry source (step S42 in FIG. 7).

The mobile phone executes the videophone function in the available bandwidth based on the received transmission / reception bandwidth information. For example, when the terminal device 3 receives transmission / reception band information of 2 Mbps as described above, it is determined that the lowest 1.5 Mbps band is available, and the image quality of the videophone video is within the range of 1.5 Mbps. Make a videophone call.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and further modifications, substitutions, and adjustments may be made without departing from the basic technical idea of the present invention. Can be added.

For example, in each of the above-described embodiments, the terminal device has been described as including the position measurement unit 111. However, for example, the information exchange server 2, the base station information storage unit 222 illustrated in FIGS. When the position and wireless status of each terminal device can be grasped on the fourth side, the position measuring unit 111 on the terminal device side can be omitted.

Also, the criteria used for grouping need not be fixed in all regions and all time zones, and may be appropriately used according to geographical characteristics, time zones, terminal device density, and the like. In addition, if the usage area seems to be limited depending on the usage of the terminal device or the attribute between users, it is possible to set specific terminal devices as an initial group in advance.

The present invention can be applied to prevent deterioration in quality of communication using different bands for individual communication such as multimedia communication using radio.

Within the scope of the entire disclosure (including claims) of the present invention, the embodiments and examples can be changed and adjusted based on the basic technical concept. Various combinations and selections of various disclosed elements are possible within the scope of the claims of the present invention. That is, the present invention of course includes various variations and modifications that could be made by those skilled in the art according to the entire disclosure including the claims and the technical idea.

1A, 1B, 1C, 3: Terminal device 2, 4:

Information exchange server

11, 21, 31, 41: Data processing device 22, 42: Storage device 111: Position measurement unit 112: Band control unit 113: Bandwidth measurement unit 114: Communication AP
211: Location information update unit 212, 412: Group update unit 213, 413: Bandwidth information notification unit 221: Location information storage unit 222, 422: Information exchange group storage unit 223: Base station information storage unit 314: Bandwidth query Unit 414: bandwidth utilization response unit

Claims

An information exchange server for exchanging transmission / reception band information between a plurality of terminal devices grouped based on the position of each terminal device;
A terminal device for exchanging transmission / reception band information via the information exchange server, and based on the received transmission / reception band information, controlling a use band for communication with other terminal devices;
Including communication system.
The terminal device
A position notification unit that acquires the position of the terminal device and notifies the information exchange server;
A bandwidth measurement unit that measures a transmission / reception bandwidth during communication and notifies the information exchange server;
A bandwidth control unit that controls a bandwidth used for communication with other terminal devices based on transmission / reception bandwidth information received from the information exchange server;
The information exchange server
A group updating unit that groups terminal devices based on position information notified from each terminal device;
The communication system according to claim 1, further comprising: a use band information notification unit that notifies transmission / reception band information notified from each terminal apparatus to the terminal apparatuses belonging to the same group.
The terminal device further includes:
A use band inquiry unit that inquires transmission / reception band information together with the position of the own machine at an arbitrary timing with respect to the information exchange server,
The information exchange server
An information exchange group storage unit for storing transmission / reception bandwidth information notified for each group;
Based on the position received from the use band inquiry unit of the terminal device, a use band response unit that responds to the transmission / reception band of the group,
The communication system according to claim 2, comprising:
The information exchange group storage unit
For each group, it is possible to save multiple notified transmission / reception bandwidth information,
The communication system according to claim 3, wherein the use band response unit responds with a plurality of notified transmission / reception band information.
The position notification unit
The communication system according to any one of claims 2 to 4, wherein a position is notified to the information exchange server when the terminal device moves.
The group update unit
The communication system according to claim 2, wherein when the terminal device moves, the group to which the terminal device belongs is updated.
The communication system according to any one of claims 2 to 6, wherein the used bandwidth measuring unit transmits a maximum value and a minimum value of a transmission / reception bandwidth measured within a predetermined time to the information exchange server.
The communication system according to any one of claims 2 to 7, wherein the group update unit groups terminal devices together with information on base stations or access points stored in advance in the information exchange server.
The group updating unit groups terminal devices based on a distance between a position of a base station or access point stored in advance in the information exchange server and a position received from the terminal device. The communication system described in 1.
The communication according to any one of claims 2 to 7, wherein the group updating unit groups terminal devices based on a distance between the terminal devices calculated from the position of each terminal device stored in the information exchange server. system.
A group updating unit for grouping terminal devices based on the position of each terminal device;
A transmission bandwidth information notified from one terminal device, a used bandwidth information notification unit for notifying terminal devices belonging to the same group,
An information exchange server for exchanging the transmission / reception band information between terminal devices having a function of controlling a usage band used for communication with other terminal devices based on the transmission / reception band information notified from the usage band information notification unit.
A position notification unit for notifying the position of its own device to an information exchange server for exchanging transmission / reception band information between terminal devices grouped based on the position of each terminal device;
A bandwidth measurement unit that measures a transmission / reception bandwidth during communication and notifies the information exchange server;
A terminal device comprising: a bandwidth control unit that controls a bandwidth to be used for communication with other terminal devices based on transmission / reception bandwidth information received from the information exchange server.
A program to be executed by a computer constituting an information exchange server for exchanging transmission / reception band information used for controlling the usage band between terminal devices having a function of controlling a usage band used for communication with other terminal devices,
Processing for grouping terminal devices based on the position of individual terminal devices;
A program for causing the computer to execute processing for notifying terminal devices belonging to the same group of transmission / reception band information notified from one terminal device.
Based on transmission / reception bandwidth information received from an information exchange server, a program to be executed by a computer mounted on a terminal device including a bandwidth control unit that controls a bandwidth used for communication with other terminal devices,
A process for notifying the information exchange server of the position of the device;
A program that causes the computer to execute a process of measuring a transmission / reception bandwidth during communication execution and notifying the information exchange server.
A terminal device notifying the information exchange server of the location of the terminal device, and causing the information exchange server to execute grouping of the terminal devices based on the location of the terminal device;
The terminal device exchanges transmission / reception band information between the terminal devices belonging to the group via the information exchange server, and controls a use band used for communication with other terminal devices based on the exchanged transmission / reception band information. And steps to
Communication bandwidth control method including
The information exchange server groups the terminal devices based on the positions notified from the individual terminal devices;
The information exchange server notifies the transmission / reception band information notified from one terminal apparatus to the terminal apparatuses belonging to the same group, and the terminal apparatus belonging to the group communicates with other terminal apparatuses based on the transmission / reception band information. Executing the control of the bandwidth used for communication;
Communication bandwidth control method including