JP2011199342A - Communication apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem with an ad hoc mode in a WLAN line connection mode in a conventional manner, wherein a communication starting source station and a communication partner station have to connect with an access point in an infrastructure mode in order to determine whether to be able to connect with the communication partner station.SOLUTION: The communication starting source station retrieves access points existing around, and notifies the communication partner station of a SSID list with SSIDs and receiving electric field levels of the retrieved access points written via a cellular line. The communication partner station determines that the communication starting source station and the communication partner station exist at a short distance and determines that connection in an ad hoc mode is possible when it confirms the coincidence of the SSIDs and the equivalent level of receiving electric field levels of a plurality of access points as a result of verifying the SSID list transmitted from the communication starting source station with a SSID list created after executing its own retrieval.

Description

  The present invention relates to a communication device capable of mobile communication such as cellular communication and wireless local area network (hereinafter referred to as “WLAN”) communication.

In recent years, many mobile phones equipped with a WLAN communication function have been released.
In a cellular phone equipped with a WLAN, there are the following two modes for the line connection mode of WLAN communication.
(1) Infrastructure mode for connection via access point (2) Ad hoc mode for direct connection between mobile phones capable of WLAN communication Currently, when the user selects and executes these connection lines, It is necessary to select line connection mode and set security.

  Further, when connecting in the ad hoc mode, it is difficult to determine in advance whether or not the communication partner can be connected before the connection is started.

  Conventionally, in the WLAN line connection mode, in order to determine whether or not it is possible to connect to the partner terminal in the ad hoc mode, in Patent Document 1, first, as shown in FIG. 10, the first mobile phone is in the infrastructure mode. When the second mobile phone is able to intercept data communicated between the first mobile phone and the access point when the connection with the communication partner is performed via the access point, the first mobile phone It was determined that connection with a mobile phone in ad hoc mode was possible, and processing such as switching to ad hoc mode was performed.

  In Patent Document 2, as shown in FIG. 1, the first mobile phone is transmitted from the access point in an environment in which the first mobile phone and the second mobile phone are connected to the access point. The network information is compared with the network information to which the user belongs, and when the network information matches as a result of the comparison, the network information is transmitted. At this time, when the second mobile phone can receive the network information transmitted by the first mobile phone, it is determined that the first mobile phone is within a range where direct wireless communication is possible. Had been implemented.

JP 2004-128785 A JP 2004-72565 A

  However, the prior art is a method based on the premise that a communication partner is connected to the access point.

  In Patent Document 1, it is a method for determining whether or not ad hoc mode connection is possible based on whether or not a communication partner can intercept data communicated between access points, and the communication partner performs data communication between access points. There is a problem that it is not possible to determine whether or not ad hoc mode connection is possible when communication is not performed.

  In Patent Document 2, it is necessary to determine whether or not an ad hoc mode connection is possible when network information transmitted by a communication partner can be received under the condition of being connected to an access point in infrastructure mode. There is a problem that it takes time to connect to the ad hoc mode.

  The present invention has been made in view of this point.

  The present invention provides a communication apparatus capable of WLAN communication that determines whether or not ad hoc mode connection is possible without connecting both stations to an access point when connecting to a communication partner in ad hoc mode. To do.

  The communication device according to the present invention is a communication device capable of WLAN communication and cellular communication, and includes a WLAN communication unit that performs WLAN communication, a WLAN communication control unit that controls the WLAN communication unit, and a WLAN communication control unit. An access point search instruction, an SSID list creation unit that creates an SSID list based on the search result, a cellular communication unit that implements cellular communication, a cellular communication control unit that controls the cellular communication unit, and a cellular line In the SSID list extracting unit for extracting the SSID list from the received data, the SSID list created by the SSID list creating unit, the SSID list matching unit for matching the SSID list extracted by the SSID list extracting unit, and the SSID list matching unit As a result of collation between the created SSID list and the extracted SSID list Hazuki, ad hoc mode connection, a configuration having a connection method selection unit for selecting whether to connect either mode infrastructure mode connection.

  With this configuration, it is possible to determine whether or not ad hoc mode connection is possible without connecting to an access point.

  In the communication apparatus according to the present invention, in the above configuration, when the connection method selection unit detects only one access point as a result of the SSID list collation by the SSID list collation unit, the connection in the infrastructure mode is performed. To choose to do.

  With this configuration, when it is determined that ad hoc mode connection is not possible, connection in infrastructure mode is possible.

  In the communication device according to the present invention, in the above configuration, the WLAN communication unit adds an SSID for ad hoc connection to the created SSID list and notifies the communication device as a communication partner, and continuously transmits a beacon. When transmission is performed and an SSID for ad hoc connection is received from the communication device serving as the communication partner, ad hoc connection is performed.

  With this configuration, when it is determined that the ad hoc mode connection is possible, the SSIDs of the communication start source stations can be simultaneously checked, and the ad hoc mode connection can be immediately established.

  The communication device of the present invention is a communication device capable of WLAN communication and cellular communication, and includes a WLAN communication unit that performs WLAN communication, a WLAN communication control unit that controls the WLAN communication unit, and a WLAN communication control unit. On the other hand, an access point search instruction is issued, and an SSID list creation unit that creates an SSID list based on the search result, a cellular communication unit that performs cellular communication, a cellular communication control unit that controls the cellular communication unit, and a cellular An SSID list extracting unit that extracts an SSID list from data received on a line, an SSID list created by an SSID list creating unit, an SSID list matching unit that matches an SSID list extracted by an SSID list extracting unit, and an SSID list matching Result of collation of the created SSID list with the extracted SSID list A connection method selection unit for selecting whether to connect in ad hoc mode connection or infrastructure mode connection, and a timer for timing, and the SSID list creation unit includes each SSID in the created SSID list. The first SSID list including the received electric field strength from the access point having the SSID is created, and the cellular communication unit receives the first received electric field level from the access point having each SSID from the communication device serving as the communication partner. The SSID list of 2 is received, and the connection method selection unit is the SSID list collation unit, the result of the collation between the first SSID list and the second SSID list performed intermittently, ad hoc mode connection, cellular line connection The connection mode was selected.

  With this configuration, it is possible to recognize the moving direction with the communication device that is the communication partner.

  In the communication device according to the present invention, in the above configuration, the connection method selection unit receives reception electric fields at at least two access points as a result of the comparison between the first SSID list and the second SSID list in the SSID list verification unit. When the time change of the level is the same, it is determined that the communication device as the communication partner is moving in the same direction at a short distance.

With this configuration, when it is determined that they are moving in the same direction, it is possible to determine that ad hoc mode connection is possible. In addition, in the communication device according to the present invention, the connection method selection unit includes the SSID. If the time change of the received electric field level at all access points is different as a result of the comparison between the first SSID list and the second SSID list in the list verification unit, it moves in a direction different from the communication device as the communication partner. It was determined that the connection was made and the connection to the cellular line system was made.

  With this configuration, when it is determined that the vehicle is moving in a different direction, it is possible to connect to a cellular line system in which communication is stable.

  In the present invention, when determining whether connection is possible in the ad hoc mode, it is not necessary to connect to the access point in the infrastructure mode, and the SSID list in which the search result of the communication start source station and the received electric field level are described is used as the communication partner. By notifying a station using a cellular line, it is possible to determine whether or not connection is possible in the ad hoc mode, and to shorten the connection time when connecting in the ad hoc mode.

  In addition, the communication start station adds the SSID for ad hoc mode connection of its own station to the SSID list and notifies the communication partner station, and at the same time, periodically transmits Beacon, so that the communication partner station searches. When it is determined that ad-hoc mode connection is possible, the ad-hoc connection SSID of the communication start source station can be immediately connected in ad-hoc mode, so that the connection time can be further reduced.

  In the present invention, the communication start source station notifies the communication partner station of the time-series SSID list in which the access point search is intermittently performed. Similarly, the communication partner station also intermittently searches for the access point in its own terminal, and compares it with the time-series SSID list notified from the communication start source station. The moving direction can also be detected, and a more accurate ad hoc mode connection is possible.

The figure which shows the system configuration | structure in Embodiment 1 of this invention. The figure which shows the block configuration of the mobile telephone concerning Embodiment 1 of this invention. The figure for demonstrating operation | movement of the mobile telephone concerning Embodiment 1 of this invention. The figure which shows the control flow concerning Embodiment 1 of this invention. The figure for demonstrating operation | movement of the mobile telephone concerning Embodiment 2 of this invention. The figure which shows the control flow concerning Embodiment 2 of this invention. The figure which shows the block configuration of the mobile telephone concerning Embodiment 3 of this invention. The figure for demonstrating operation | movement of the mobile telephone concerning Embodiment 3 of this invention. The figure which shows the control flow concerning Embodiment 3 of this invention. The figure which shows the ad hoc connection method by the conventional system

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an overall configuration diagram of the present invention.

  Access points 101 and 102 are access points to which the mobile phone is connected in the infrastructure mode.

  Mobile phones 101-1 and 101-2 are mobile phones connected to the access point 101.

  In addition, the mobile phone 101-1 and the mobile phone 101-2 can be connected in an ad hoc mode without going through an access point.

  The mobile phone 102-1 and the mobile phone 101-2 are mobile phones connected to the access point 102.

  The mobile phone base station 203 is a mobile phone base station in which the mobile phones 101-1, 101-2, and 102-1 perform communication using cellular lines.

  The Internet network 204 is an Internet network through which the mobile phone 101-1 (or 101-2) communicates with the mobile phone 102 via the access points 101 and 102.

  In the system configuration of the present invention shown in FIG. 1, Embodiment 1 of the present invention will be described.

(Embodiment 1)
FIG. 2 is a diagram showing a block configuration of the mobile phone according to the first exemplary embodiment of the present invention.

  The mobile phone 200 is a mobile phone capable of WLAN communication.

  The antenna 201 is an antenna for WLAN communication.

  The WLAN communication unit 202 performs wireless communication of a transmission signal and a reception signal of WLAN communication.

  The WLAN communication control unit 203 performs WLAN communication unit control, detection of an SSID searched for an AP, AP search execution, and Beacon transmission.

  As a result of performing the AP search, the SSID list creation unit 204 creates an SSID list.

  The SSID list collation unit 205 collates the SSID list detected by itself with the SSID list notified from the other party.

  The connection method selection unit 206 selects a WLAN connection mode from the collation result by the SSID list collation unit.

  The antenna 207 is a cellular antenna.

  The cellular communication unit 208 performs wireless communication of transmission signals and reception signals in the cellular network.

  The cellular communication control unit 209 performs transmission / reception of cellular data including control of the cellular communication unit and transmission / reception of the SSID list.

  The SSID list extraction unit 210 instructs the cellular communication control unit to extract the SSID list received by the cellular communication control unit and transmit the SSID list detected on the WLAN side.

  The operation of the first embodiment of the present invention will be described with reference to FIGS.

  FIG. 3 is a diagram for explaining the operation of the mobile phone according to the first exemplary embodiment of the present invention.

  FIG. 4 is a diagram showing a control flow according to the first embodiment of the present invention.

  In FIG. 3, a mobile phone 301 is a communication start source station, and a mobile phone 302 is a communication partner station.

  The SSID list 303 is an SSID list obtained as a result of performing an AP search at the communication start source station.

  The SSID list 304 is an SSID list obtained as a result of performing an AP search at a communication partner station.

  In the present embodiment, the mobile phone 301 that is the communication start source station performs ad hoc connection to the mobile phone 302 that is the communication partner station.

  The control flow in FIG. 4 will be described.

Prior to the start of communication, an AP search is first performed at the communication start source station (step S101).
Next, based on the AP search result, the SSID list 303 shown in FIG. 3 describing the SSID and the received electric field level is created (step S102).

  The communication start source station notifies the detected SSID list to the communication partner station using the cellular line (step S103).

  The communication partner station receives the SSID list from the communication start source station via the cellular line (step S104).

  The communication partner station extracts the SSID list from the data received from the communication start source station via the cellular line (step S105).

Next, the communication partner station performs AP search itself (step S106).
An SSID list is created from the result of AP search by itself (step S107).

  The SSID list notified from the communication start source station is compared with the SSID list detected and created by itself (step S108).

  As a result of collating the SSID list, it is determined whether or not a plurality of received electric field levels of the SSID and each SSID match (step S109).

  If a plurality of SSIDs and received electric field levels match in step S109, connection is made in the ad hoc mode (step S110).

  In FIG. 3, since three SSIDs ('abcdef', 'keitai', and '1234567') can be detected at the same reception electric field level in the SSID list 303 and the SSID list 304, it is determined that they are close to each other. Then, it is determined that the ad hoc mode connection is possible, and an operation for starting the ad hoc connection is performed.

  In step S109, if only one SSID and the received electric field level match, connection is made in infrastructure mode to a common access point in the SSID list (step S111).

  By controlling in this way, it is possible to provide a WLAN communication apparatus that can determine whether connection in an ad hoc mode is possible without connecting to an access point.

(Embodiment 2)
A second embodiment of the present invention will be described with reference to FIGS.

  FIG. 5 is a diagram for explaining the operation of the mobile phone according to the second embodiment of the present invention.

  FIG. 6 is a diagram showing a control flow according to the second embodiment of the present invention.

  In FIG. 5, a mobile phone 501 is a communication start source station, and a mobile phone 502 is a communication partner station.

  The SSID list 503 is an SSID list in which an AP search is performed at a communication start source station.

  The SSID list 504 is an SSID list obtained by performing an AP search at a communication partner station.

  In this embodiment, a mobile phone 501 that is a communication start source station performs ad hoc connection to a mobile phone 502 that is a communication partner station.

  The control flow in FIG. 6 will be described.

  Prior to the start of communication, an AP search is performed at the communication start source station (step S201).

  Next, based on the AP search result, the SSID list 503 shown in FIG. 5 describing the SSID and the received electric field level is created (step S202).

  When creating this SSID list, the SSID for ad hoc connection of the communication start source station is attached to the SSID list 503 (step S203).

In FIG. 5, the SSID “WLAN” of the local station is attached as the SSID for ad hoc connection, and the SSID list attached to the communication partner station is created again.
The communication start source station notifies the communication partner station of the created SSID list using the cellular line (step S204).

  In S204, the SSID list is transmitted through the cellular line, and at the same time, the beacon transmission is periodically started using the SSID for ad hoc connection (step S205).

The communication partner station receives the SSID list from the communication start source station via the cellular line (step S206).
The communication partner station extracts the SSID list from the data received via the cellular line from the communication start source station (step S207).

  The communication partner station performs AP search itself (step S208).

  An SSID list is created based on the result of AP search by itself (step S209).

  The SSID list notified from the communication start source station is compared with the SSID list detected and created by itself (step S210).

  As a result of collating the SSID list, it is determined whether or not a plurality of received electric field levels of the SSID and each SSID match (step S211).

  If a plurality of SSIDs and received electric field levels match in step S211, it is determined that connection is possible in the ad hoc mode (step S212).

  At this time, in FIG. 5, connection to the SSID 'WLAN' for ad hoc connection notified of the communication start source station is performed. This has the effect of reducing the time required for ad hoc connection.

  If only one SSID and the received electric field level match in step S211, connection is made in infrastructure mode to a common access point in the SSID list (step S212).

By controlling in this way, it is possible to provide a WLAN communication apparatus that can immediately connect to the notified SSID for ad hoc mode connection when it is determined that the ad hoc mode connection is possible in the present invention.

(Embodiment 3)
FIG. 7 is a block diagram of a mobile phone according to the third embodiment of the present invention.

  A cellular phone 700 is a cellular phone capable of WLAN communication.

  The antenna 701 is an antenna for WLAN communication.

  The WLAN communication unit 702 performs wireless communication between a WLAN transmission signal and a reception signal.

  The WLAN communication control unit 703 performs WLAN communication unit control, detection of an SSID searched for an AP, execution of an AP search, and transmission of a Beacon.

  The SSID list creation unit 704 creates an SSID list based on the result of intermittent AP search that is a feature of the third embodiment.

  The timer 705 generates a trigger for performing AP search intermittently.

  The SSID list collation unit 706 collates the SSID list detected by itself with the SSID list notified from the other party.

  The connection method selection unit 707 selects a WLAN connection mode from the collation result by the SSID list collation unit.

  The cellular antenna 708 is an antenna for cellular communication.

  The cellular communication unit 709 performs wireless communication of transmission signals and reception signals in the cellular network.

  The cellular communication control unit 710 performs cellular data transmission / reception including control of the cellular communication unit and transmission / reception of the SSID list.

  The SSID list extraction unit 711 instructs the cellular communication control unit to extract the SSID list received by the cellular communication control unit and transmit the SSID list.

  The operation of the third embodiment of the present invention will be described with reference to FIGS.

  FIG. 8 is a diagram for explaining the operation of the mobile phone according to the third embodiment of the present invention.

  FIG. 9 is a diagram showing a control flow according to the second embodiment of the present invention.

  In FIG. 8, a mobile phone 801 is a communication start source station, and a mobile phone 802 is a communication partner station.

  A list 803 is a time-series SSID list obtained by performing an AP search at a communication start source station.

  A list 804 is a time-series SSID list obtained by performing an AP search at a communication partner station.

  In the present embodiment, a mobile phone 801 that is a communication start source station performs an ad hoc connection to a mobile phone 802 that is a communication partner station.

  The control flow in FIG. 9 will be described.

  At the communication start source station, an AP search is performed based on the trigger from the timer 705 in FIG. 7 (step S301).

  Next, the number of AP searches is detected (step S302).

It is determined whether a predetermined number of searches has been performed from the detected number of searches (step S
303).

  If the predetermined number of searches has not been performed, the AP search is performed again according to the timing of the timer 705.

  When a predetermined number of search times determined in advance is performed, the time series (T (0), T (1), T) shown in the list 803 of FIG. 8 describing the SSID and the received electric field level based on the search results. A time-series SSID list in (2)) is created (step S304).

  The communication start source station notifies the detected time-series SSID list to the communication partner station using the cellular line (step S305).

  The communication partner station receives the time-series SSID list from the communication start source station via the cellular line (step S306).

The communication partner station extracts a time-series SSID list from the data received from the communication start source station via the cellular line (step S307).

  Next, the communication partner station performs an AP search by itself based on the trigger from the timer 705 (step S308).

  Next, the number of times of AP search is detected (step S309).

It is determined whether a predetermined number of searches has been performed from the detected number of searches (step S
310).

  If the predetermined number of searches has not been performed, the AP search is performed again according to the timing of the timer 705.

  When a predetermined number of times of search determined in advance is executed, a time-series SSID list of the own terminal is created based on the search result (step S31).

  Next, the time-series SSID list notified from the communication start source station is compared with the time-series change of the SSID list created by the own terminal through the AP search (step S312).

  As a result of collating the SSID list, it is determined whether or not a plurality of changes in the received electric field level of the SSID and each SSID coincide (step S313).

  In FIG. 8, the time change of the received electric field level with the SSID “keitai” in the time-series SSID list and the received electric field level with the SSID “12345678” is the same change at the communication start source station and the communication partner station. Yes.

  From this result, since the two SSIDs and the time variations of the received electric field level coincide with each other, it is determined that both stations are moving in the same direction.

  If a plurality of changes in SSID and received electric field level match in S313, it is determined that ad hoc mode connection is possible, and connection is established in ad hoc mode (step S314).

  If the changes in the plurality of SSIDs and the received electric field level do not match in S313, it is determined that both stations are moving in different directions, and connection via the cellular is performed (procedure S315).

By controlling in this way, it is possible to determine whether or not the ad hoc mode connection is possible, including the moving direction of the communication start source station and the communication partner station, and therefore, a WLAN communication apparatus capable of more stable connection is provided. be able to.

  The communication apparatus according to the present invention is suitable for a mobile phone or the like equipped with a WLAN.

101, 102, 1001 Access point 101-1, 101-2, 102-1, 200, 301, 302, 501, 502, 700, 801, 802, 1001-1, 1001-2 Mobile phone 103 Mobile phone base station 201 , 701 WLAN antenna 202, 702 WLAN communication unit 203, 703 WLAN communication control unit 204, 704 SSID list creation unit 205, 706 SSID list collation unit 206, 707 Connection method selection unit 207, 708 Cellular antenna 208, 709 Cellular communication unit 209 , 710 Cellular communication control unit 210, 711 SSID list extraction unit 705 timer

Claims (6)

A communication device capable of WLAN communication and cellular communication,
A WLAN communication unit that performs WLAN communication;
A WLAN communication control unit for controlling the WLAN communication unit;
An SSID list creation unit that instructs the WLAN communication control unit to search for an access point and creates an SSID list based on the search result;
A cellular communication unit for carrying out cellular communication;
A cellular communication control unit for controlling the cellular communication unit;
An SSID list extraction unit for extracting an SSID list from data received by a cellular line;
An SSID list collation unit for collating the SSID list created by the SSID list creation unit with the SSID list extracted by the SSID list extraction unit;
A connection method selection unit that selects whether to connect in an ad hoc mode connection or an infrastructure mode connection based on a result of matching between the created SSID list and the extracted SSID list in an SSID list matching unit;
A communication apparatus comprising: The communication device according to claim 1,
The connection method selection unit performs connection in the infrastructure mode when only one access point is detected as a result of the verification of the created SSID list and the extracted SSID list in the SSID list verification unit. select,
A communication device. The communication device according to claim 1,
The WLAN communication unit adds an SSID for ad hoc connection to the created SSID list and notifies the communication device as a communication partner, and continuously transmits a beacon to the communication device as the communication partner. When the SSID for ad hoc connection is received from, the ad hoc connection is performed.
A communication device. A communication device capable of WLAN communication and cellular communication,
A WLAN communication unit that performs WLAN communication;
A WLAN communication control unit for controlling the WLAN communication unit;
An SSID list creation unit that instructs the WLAN communication control unit to search for an access point and creates an SSID list based on the search result;
A cellular communication unit for carrying out cellular communication;
A cellular communication control unit for controlling the cellular communication unit, an SSID list extraction unit for extracting an SSID list from data received by the cellular line,
An SSID list collation unit for collating the SSID list created by the SSID list creation unit with the SSID list extracted by the SSID list extraction unit;
A connection method selection unit that selects whether to connect in an ad hoc mode connection or an infrastructure mode connection based on a result of matching between the created SSID list and the extracted SSID list in the SSID list matching unit;
A timer to count,
Comprising
The SSID list creation unit creates a first SSID list including the received electric field strength from an access point having each SSID in the created SSID list,
The cellular communication unit receives the second SSID list including the received electric field level from the access point having each SSID from the communication device as the communication partner,
The connection method selection unit is an SSID list collation unit, and whether the connection is made in ad hoc mode connection or cellular line connection as a result of intermittent comparison of the first SSID list and the second SSID list. Select
A communication device. The communication device according to claim 4,
The connection method selection unit, when the time variation of the received electric field level at the two access points is the same as a result of the comparison between the first SSID list and the second SSID list in the SSID list verification unit, It is determined that the communication device is moving in the same direction at a short distance, and an ad hoc mode connection is made.
A communication device. The communication device according to claim 4,
The connection method selection unit is configured to communicate with the communication partner when the time change of the received electric field level at all the access points is different as a result of the comparison between the first SSID list and the second SSID list in the SSID list verification unit. Judge that it is moving in a different direction from the device, and connect to the cellular line system.
A communication device.

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