WO2010150434A1 - Wireless reception device, wireless transmission device, and method for deciding timing of beacon reception - Google Patents

Wireless reception device, wireless transmission device, and method for deciding timing of beacon reception Download PDF

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Publication number
WO2010150434A1
WO2010150434A1 PCT/JP2010/001096 JP2010001096W WO2010150434A1 WO 2010150434 A1 WO2010150434 A1 WO 2010150434A1 JP 2010001096 W JP2010001096 W JP 2010001096W WO 2010150434 A1 WO2010150434 A1 WO 2010150434A1
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Prior art keywords
beacon
base station
wireless
transmission
reception
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PCT/JP2010/001096
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French (fr)
Japanese (ja)
Inventor
星吉行
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パナソニック株式会社
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Publication of WO2010150434A1 publication Critical patent/WO2010150434A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a wireless reception device, a wireless transmission device, and a beacon reception timing determination method.
  • a wireless terminal device equipped with a WLAN function can be used by switching both the mobile phone system and the WLAN system.
  • an ad hoc network in which wireless terminal devices can be connected to each other by WLAN without requiring an access point (AP).
  • An ad hoc network can easily construct a network even in a place where an infrastructure such as an AP does not exist.
  • the wireless terminal device In order to configure an ad hoc network (that is, an ad hoc mode WLAN system) in the WLAN system, the wireless terminal device periodically transmits beacons. On the other hand, in order to participate in an ad hoc network, the wireless terminal device periodically detects (scans) a beacon. Then, when a side that participates in the ad hoc network, that is, a wireless terminal device (wireless receiving device) that periodically detects beacons detects an SSID (Service Set Identifier) of the target ad hoc network, the side that forms the ad hoc network That is, an ad hoc communication connection operation with a wireless terminal device (wireless transmission device) that transmits a beacon is started. Conventionally, a wireless transmission device transmits a beacon at regular intervals (for example, a transmission cycle of 100 ms) (see, for example, Patent Document 1 and Patent Document 2).
  • SSID Service Set Identifier
  • the wireless transmission device transmits beacons at regular intervals. Therefore, in the wireless transmission device, in order to keep power consumption for beacon transmission low, it is preferable to reduce the beacon transmission frequency by setting a long beacon transmission interval.
  • the wireless reception device does not know the transmission timing of the beacon transmitted by the wireless transmission device. Therefore, in order to detect a beacon transmitted at regular intervals, the wireless reception device needs to continuously receive a beacon for a beacon transmission period (for example, 100 ms). Therefore, in order to keep the power consumption for continuous reception of beacons low in the wireless reception device, it is preferable that the beacon transmission frequency is increased by shortening the beacon transmission interval from the wireless transmission device.
  • the power consumption can be kept low.
  • An object of the present invention is to provide a wireless reception device, a wireless transmission device, and a beacon reception timing determination method capable of suppressing power consumption on both the beacon transmission side and the reception side.
  • the radio reception apparatus of the present invention is a radio reception apparatus that can use a first communication system and a second communication system different from the first communication system, and a control transmitted by a base station apparatus of the first communication system.
  • a configuration is provided that includes a determination unit that determines a reception timing of a beacon used in the second communication system in synchronization with a signal transmission timing, and a reception unit that receives the beacon according to the reception timing.
  • the radio transmission apparatus of the present invention is a radio transmission apparatus that can use a first communication system and a second communication system different from the first communication system, and a control transmitted by a base station apparatus of the first communication system.
  • a configuration is provided that includes a determination unit that determines a transmission timing of a beacon used in the second communication system in synchronization with a transmission timing of a signal, and a transmission unit that transmits the beacon according to the transmission timing.
  • the beacon reception timing determination method of the present invention determines a beacon reception timing used in a second communication system different from the first communication system in synchronization with a transmission timing of a control signal transmitted by a base station apparatus of the first communication system. I tried to do it.
  • power consumption can be kept low on both the beacon transmission side and the reception side.
  • wireless communications system of this invention 1 is a block diagram showing a configuration of a wireless transmission device according to Embodiment 1 of the present invention.
  • FIG. 2 is a block diagram showing a configuration of a radio reception apparatus according to Embodiment 1 of the present invention.
  • the block diagram which shows the structure of the radio
  • FIG. 9 is a block diagram showing a configuration of a radio reception apparatus according to Embodiment 4 of the present invention.
  • FIG. 1 shows a configuration of a wireless communication system according to each embodiment of the present invention.
  • a mobile phone A and a mobile phone B are located in a cover area (mobile phone area) of a base station (mobile phone base station) of the mobile phone system.
  • the base station shown in FIG. 1 periodically broadcasts a broadcast signal including the base station ID of the local station to terminals located in the cover area of the local station.
  • the transmission cycle of the notification signal is 2.56 s.
  • the mobile phone A and the mobile phone B shown in FIG. 1 perform ad hoc communication in the ad hoc mode WLAN system. That is, the cellular phone A and the cellular phone B constitute the WLAN area shown in FIG. That is, the mobile phone A and the mobile phone B can use both the mobile phone system and the WLAN system.
  • the mobile phone A and the mobile phone B shown in FIG. 1 are equipped with both the radio transmission device and the radio reception device according to each embodiment.
  • Each mobile phone performs wireless transmission according to each embodiment of the present invention, depending on whether the mobile phone is a side constituting an ad hoc mode WLAN system or a side participating in the ad hoc mode WLAN system.
  • the operation of the device and the operation of the wireless reception device are switched and used.
  • the mobile phone A transmits a beacon
  • the mobile phone B detects the beacon. That is, in FIG. 1, a mobile phone A that transmits a beacon operates as a wireless transmission device according to each embodiment of the present invention, and a mobile phone B that receives a beacon is a wireless reception device according to each embodiment of the present invention. Works as.
  • FIG. 2 shows the configuration of radio transmitting apparatus 100 according to the present embodiment
  • FIG. 3 shows the configuration of radio receiving apparatus 200 according to the present embodiment.
  • the wireless unit 103 of the mobile phone processing unit 102 transmits a notification signal notified from the base station (FIG. 1) of the mobile phone system shown in FIG. ) Via. Radio section 103 then outputs the received notification signal to timing detection section 104.
  • the timing detection unit 104 of the mobile phone processing unit 102 detects the transmission timing of the notification signal based on the notification signal input from the wireless unit 103. Then, the timing detection unit 104 outputs the detected transmission timing of the notification signal to the determination unit 106 of the WLAN processing unit 105.
  • the determination unit 106 of the WLAN processing unit 105 determines the transmission timing of the beacon used in the WLAN system based on the transmission timing of the notification signal input from the timing detection unit 104. Specifically, the determination unit 106 determines the transmission timing of the beacon used in the WLAN system in synchronization with the transmission timing of the notification signal transmitted by the base station of the mobile phone system. That is, the determination unit 106 determines the transmission timing of the notification signal transmitted from the base station to which the own device belongs as the beacon transmission timing. For example, when the transmission timing of the notification signal notified from the base station is constant, the determination unit 106 determines the beacon transmission cycle in synchronization with the notification signal transmission cycle. Then, the determination unit 106 outputs the determined beacon transmission timing to the WLAN transmission unit 107.
  • the WLAN transmission unit 107 of the WLAN processing unit 105 transmits a beacon via the antenna 108 (WLAN antenna) according to the beacon transmission timing input from the determination unit 106.
  • the mobile phone processing unit 202 has the same configuration as the mobile phone processing unit 102 (FIG. 2) of the wireless transmission device 100. That is, the radio unit 203 of the mobile phone processing unit 202 receives the notification signal notified from the base station (FIG. 1) via the antenna 201 (cell phone antenna), similarly to the radio unit 103 (FIG. 2). . Similarly to the timing detection unit 104 (FIG. 2), the timing detection unit 204 of the mobile phone processing unit 202 detects the transmission timing of the notification signal based on the notification signal input from the wireless unit 203. Then, the timing detection unit 204 outputs the detected transmission timing of the notification signal to the determination unit 206 of the WLAN processing unit 205.
  • the determination unit 206 of the WLAN processing unit 205 determines the reception timing of the beacon used in the WLAN system based on the transmission timing of the notification signal input from the timing detection unit 204. Specifically, the determination unit 206 determines the reception timing of the beacon used in the WLAN system in synchronization with the transmission timing of the notification signal transmitted by the base station of the mobile phone system. That is, the determination unit 206 determines the transmission timing of the notification signal transmitted from the base station to which the own device belongs as the beacon reception timing. For example, when the transmission timing of the notification signal notified from the base station is constant, the determination unit 206 determines the beacon reception period in synchronization with the transmission period of the notification signal. Then, the determination unit 206 outputs the determined beacon reception timing to the WLAN reception unit 207.
  • the WLAN reception unit 207 of the WLAN processing unit 205 receives a beacon via the antenna 208 (WLAN antenna) according to the beacon reception timing input from the determination unit 206.
  • the mobile phone A shown in FIG. 1 operates as the wireless transmission device 100
  • the mobile phone B operates as the wireless reception device 200. That is, the mobile phone A (wireless transmission device 100) transmits a beacon, and the mobile phone B (wireless reception device 200) receives the beacon.
  • the timing detection unit 104 of the mobile phone A (wireless transmission device 100) and the timing detection unit 204 of the mobile phone B (wireless reception device 200) Detect signal transmission timing.
  • the determination part 106 of the mobile telephone A determines the transmission timing of an alerting
  • the determination unit 206 of the mobile phone B determines the transmission timing of the notification signal as the reception timing of the beacon. That is, the determination unit 206 determines the beacon reception timing in synchronization with the notification signal transmission timing. Then, the WLAN receiver 207 of the mobile phone B (wireless receiver 200) receives the beacon at the beacon reception timing determined by the determination unit 206 (that is, the notification signal transmission timing).
  • the wireless transmission device 100 and the wireless reception device 200 determine the transmission timing and reception timing of the beacon used in the WLAN system in synchronization with the transmission timing of the notification signal used in the mobile phone system. That is, the wireless reception device 200 can identify the transmission timing of the beacon in the wireless transmission device 100 by detecting the transmission timing of the notification signal notified by the base station. Thereby, the radio
  • the beacon transmission cycle in FIG. 4 is 2.56 s, which is sufficiently longer than the conventional beacon transmission cycle. That is, since the wireless transmission device 100 can reduce the frequency of beacon transmission by transmitting beacons at longer transmission intervals, the power consumption for beacon transmission can be kept low.
  • the wireless reception device 200 does not continuously receive (continuous scan) beacons for the beacon transmission cycle of 2.56 s, even when the beacon transmission cycle becomes long, but instead of the beacon transmission cycle 2. A beacon may be received (scanned) every 56 s. Therefore, in the wireless reception device 200, the power consumption for beacon reception can be kept low.
  • the wireless transmission device and the wireless reception device that perform ad hoc communication are synchronized with the transmission timing of the notification signal notified by the base station of the mobile phone system to which the device belongs.
  • the beacon transmission timing and reception timing used in the system are respectively determined.
  • the beacon transmission frequency is higher than the conventional beacon transmission frequency (for example, beacon transmission every 100 ms).
  • the power consumption at the time of beacon transmission can be reduced.
  • the wireless reception device receives the beacon in synchronization with the transmission timing of the notification signal in the same manner as the wireless transmission device, the transmission timing of the beacon from the wireless transmission device can be specified. Therefore, even when the beacon transmission interval becomes long (when the transmission frequency decreases), the wireless reception device can receive the beacon without performing continuous reception (continuous scanning) of the beacon. Therefore, in the wireless reception device, the power consumption at the time of receiving the beacon can be kept low. Therefore, according to the present embodiment, the power consumption can be kept low on both the beacon transmission side and the reception side.
  • the radio transmission device and the radio reception device start transmitting and receiving beacons when a base station ID identical to a preset base station ID is detected from the notification signal.
  • FIG. 5 shows the configuration of radio transmitting apparatus 300 according to the present embodiment
  • FIG. 6 shows the configuration of radio receiving apparatus 400 according to the present embodiment.
  • FIGS. 5 and 6 the same components as those in the first embodiment (FIGS. 2 and 3) are denoted by the same reference numerals, and description thereof is omitted.
  • a notification signal is input from the timing detection unit 104 to the base station ID detection unit 301 of the mobile phone processing unit 102. Then, the base station ID detection unit 301 detects the base station ID (that is, the base station ID of the base station that transmitted the notification signal) from the notification signal input from the timing detection unit 104. Base station ID detection section 301 then outputs the detected base station ID to collation section 302.
  • the collation unit 302 stores a base station ID of a specific base station in advance.
  • the collation unit 302 collates the base station ID input from the base station ID detection unit 301 with the base station ID stored in advance. Then, as a result of the collation, when the base station ID input from the base station ID detection unit 301 is the same as the base station ID stored in advance, the collation unit 302 displays information indicating the start of beacon transmission as a WLAN transmission unit. It outputs to 107.
  • WLAN transmitter 107 starts beacon transmission according to the transmission timing determined by determination unit 106 in the same manner as in the first embodiment.
  • the mobile phone processing unit 202 has the same configuration as the mobile phone processing unit 102 (FIG. 5) of the wireless transmission device 300. That is, the base station ID detection unit 401 of the mobile phone processing unit 202 performs the same processing as the base station ID detection unit 301 (FIG. 5) of the mobile phone processing unit 102.
  • the collation unit 402 performs the same processing as the collation unit 302 of the wireless transmission device 300. That is, collation section 402 outputs information indicating beacon reception start to WLAN reception section 207 when the base station ID input from base station ID detection section 401 is the same as the prestored base station ID. .
  • WLAN reception unit 207 starts receiving beacon according to the reception timing determined by determination unit 206 as in the first embodiment. To do.
  • the mobile phone A (wireless transmission device 300) and the mobile phone B (wireless reception device 400) shown in FIG. 1 are stored in advance in specific base stations (that is, the matching unit 302 and the matching unit 402).
  • Beacon transmission / reception (for example, transmission / reception of beacons shown in FIG. 4) used in the WLAN system is performed only within the coverage area of the base station with the base station ID. That is, the mobile phone A (wireless transmitter 300) and the mobile phone B (wireless receiver 400) shown in FIG. 1 perform ad hoc communication only within the coverage area of a specific base station. That is, mobile phone A (wireless transmitter 300) and mobile phone B (wireless receiver 400) shown in FIG. 1 do not perform ad hoc communication except in the coverage area of a specific base station.
  • the mobile phone A (wireless transmitter 300) and the mobile phone B (wireless receiver 400) shown in FIG. 1 are base stations of base stations corresponding to a specific area such as a home or a meeting place as an area for performing ad hoc communication. ID is stored in advance.
  • mobile phone A (wireless transmission device 300) and mobile phone B (wireless reception device 400) shown in FIG. 1 are located in a specific area such as a home or a meeting place, bases corresponding to the specific area are provided.
  • the broadcast signal is received from the station, and the base station ID of the base station is detected.
  • the mobile phone A (wireless transmission device 300) and the mobile phone B (wireless reception device 400) collate the base station ID stored in advance with the detected base station ID, thereby performing ad hoc communication. Judge whether there is. Thereby, mobile phone A (wireless transmitter 300) and mobile phone B (wireless receiver 400) start transmission / reception of beacons used in the WLAN system as shown in FIG. 4 only within the coverage area of the specific base station. To perform ad hoc communication.
  • the radio transmission device and the radio reception device start transmitting and receiving beacons only in the coverage area of a specific base station stored in advance, that is, in an area where ad hoc communication is performed.
  • the power consumption can be further reduced on both the transmitting side and the receiving side.
  • FIG. 7 shows the configuration of radio transmitting apparatus 500 according to the present embodiment
  • FIG. 8 shows the configuration of radio receiving apparatus 600 according to the present embodiment. 7 and 8, the same components as those of the second embodiment (FIGS. 5 and 6) are denoted by the same reference numerals, and description thereof is omitted.
  • the input unit 501 inputs a specific position by, for example, an operation input.
  • the input unit 501 generates position information indicating a position (for example, a meeting place) designated by a user operation input on a GPS (Global Positioning System) map. Then, the input unit 501 outputs the generated position information to the collation unit 302.
  • GPS Global Positioning System
  • the collation unit 302 searches for a base station ID corresponding to the position indicated by the position information input from the input unit 501 from a plurality of base station IDs stored in advance. Then, the collation unit 302 searches the base station ID (that is, the base station ID of the base station corresponding to the input specific position) and the base station ID (notification signal transmission) input from the base station ID detection unit 301. The base station ID) of the original base station. Then, as a result of the collation, when the base station ID input from the base station ID detection unit 301 is the same as the searched base station ID, the collation unit 302 sends control information indicating the start of beacon transmission to the WLAN transmission unit 107. Output.
  • the input unit 601 performs the same processing as the input unit 501 (FIG. 7) of the wireless transmission device 500.
  • the collation unit 402 is a base station ID corresponding to the position indicated by the positional information input from the input unit 601 out of a plurality of prestored base station IDs. Search for. Then, when the base station ID input from base station ID detection section 401 is the same as the searched base station ID, collation section 402 outputs control information indicating the start of beacon reception to WLAN reception section 207.
  • the wireless transmission device 500 is determined by the determination unit 106 only when the same base station ID as the base station ID of the base station corresponding to the specific position input by the input unit 501 is detected from the broadcast signal.
  • a beacon is transmitted according to the beacon transmission timing.
  • radio receiving apparatus 600 is determined by determining section 206 only when the same base station ID as the base station ID of the base station corresponding to the specific position input by input section 601 is detected from the broadcast signal. The beacon is received according to the received beacon timing.
  • FIG. 9 shows the configuration of radio transmitting apparatus 700 according to the present embodiment
  • FIG. 10 shows the configuration of radio receiving apparatus 800 according to the present embodiment.
  • the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
  • the out-of-range detection unit 701 of the mobile phone processing unit 102 is out of the range (within the cover area) of the base station (FIG. 1) of the mobile phone system at the own device or the ad hoc communication partner ( Detecting a transition from outside the coverage area) and a transition from outside the coverage area of the base station to the coverage area.
  • the out-of-service detection unit 701 detects that the base station shifts from the base station area to the out-of-service area or the base station from the out-of-service area to the service area
  • the out-of-service detection unit 701 Transition information indicating a transition from outside the service area to the service area is output to the wireless unit 103.
  • the wireless unit 103 transmits the transition information to the ad hoc communication partner. Further, the out-of-service detection unit 701 detects whether the ad hoc communication partner is located within or outside the base station based on the transition information from the ad hoc communication partner input from the wireless unit 103. Thereby, the out-of-service detection unit 701 specifies whether the own device and the ad hoc communication partner are located within or outside the base station.
  • the out-of-service detection unit 701 determines information indicating that the self-device or the ad hoc communication partner is located outside the service area of the base station when either the own device or the ad hoc communication partner is located outside the service area of the base station. It outputs to 106. On the other hand, when both the own device and the ad hoc communication partner are located within the base station, the out-of-service detection unit 701 determines information indicating that both the own device and the ad hoc communication partner are located within the base station. Output to.
  • the determination unit 106 determines the beacon transmission timing as a preset transmission timing. .
  • the determination unit 106 is similar to the timing detection unit 104 in the first embodiment. Is determined as the beacon transmission timing.
  • the mobile phone processing unit 202 adopts the same configuration as the mobile phone processing unit 102 (FIG. 9) of the wireless transmission device 700. That is, the out-of-range detection unit 801 of the mobile phone processing unit 202 performs the same processing as the out-of-range detection unit 701 (FIG. 9) of the mobile phone processing unit 102.
  • the determination unit 206 sets a beacon reception timing to a preset reception timing ( It is determined at the same timing as the transmission timing set in advance by the determination unit 106.
  • the determination unit 206 is the timing detection unit 204 as in the first embodiment. Is determined as the beacon reception timing.
  • the mobile phone A (wireless transmission device 700) shown in FIG. 1 moves out of the cover area of the base station. That is, the out-of-service detection unit 701 of the mobile phone A (wireless transmission device 700) detects that the own device has moved out of service.
  • 100 ms is set in advance as the beacon transmission / reception timing in determination unit 106 (FIG. 9) and determination unit 206 (FIG. 10).
  • the wireless unit 103 of the mobile phone A notifies the mobile phone B (wireless reception device 800) of transition information indicating that the own device has moved out of service area.
  • the out-of-service detection unit 801 of the mobile phone B detects that the mobile phone A (wireless transmission device 700), which is an ad hoc communication partner, has moved out of service.
  • the beacon transmission timing (reception timing) is determined to be 100 ms set in advance.
  • the wireless unit 103 of the mobile phone A (wireless transmission device 700) is within range.
  • the mobile phone B (wireless receiver 800) is notified of the transfer information indicating the transfer.
  • the out-of-service detection unit 801 of the mobile phone B (wireless reception device 800) detects that the mobile phone A (wireless transmission device 700), which is an ad hoc communication partner, has moved into the service area.
  • the determination unit 106 of the mobile phone A (wireless transmission device 700) and the determination unit 206 of the mobile phone B (wireless reception device 800) are the mobile phone A (wireless transmission device 700) and the mobile phone B (wireless reception device 800). Since both are located within the area of the base station, the transmission timing of the notification signal is determined as the transmission timing (reception timing) of the beacon as shown in FIG. 4 in the same manner as in the first embodiment.
  • both the own device and the ad hoc communication partner in the WLAN system are located within the coverage (in the cover area) of the base station (base station of the mobile phone system) shown in FIG.
  • beacons are transmitted and received according to the transmission timing and the reception timing determined by the determination unit 106 and the determination unit 206, respectively.
  • the wireless transmission device 700 and the wireless reception device 800 are either out of the base station (base station of the mobile phone system) shown in FIG. When located, a beacon is transmitted / received according to a preset transmission timing and reception timing.
  • beacon transmission / reception is performed using a preset timing. I do. Therefore, according to the present embodiment, even when any one of the terminals that perform ad hoc communication is located outside the base station coverage area (out of the cover area), beacon can be transmitted and received, and ad hoc communication can be performed. Further, when both terminals that perform ad hoc communication are located within the base station area (within the cover area), the same effect as in the first embodiment can be obtained.
  • the present invention is useful for mobile communication systems and the like.

Abstract

Provided is a wireless reception device whereby power consumption of both a beacon transmission side and a reception side can be kept low. The provided wireless reception device (200) can use both a mobile phone system and a WLAN system that differs from the mobile phone system. A decision unit (206) in a WLAN processing unit (205) decides the reception timing of a beacon, which is used in the WLAN system, by synchronizing on the transmission of an annunciation signal transmitted by a base station device in the mobile phone system. A WLAN reception unit (207) in the WLAN processing unit (205) receives the beacon using the reception timing decided by the decision unit (206).

Description

無線受信装置、無線送信装置およびビーコン受信タイミング決定方法Wireless receiving apparatus, wireless transmitting apparatus, and beacon reception timing determination method
　本発明は、無線受信装置、無線送信装置およびビーコン受信タイミング決定方法に関するものである。 The present invention relates to a wireless reception device, a wireless transmission device, and a beacon reception timing determination method.
　近年、携帯電話機等の無線端末装置に無線ＬＡＮ（ＷＬＡＮ：Wireless Local Area Network）機能を搭載することが検討されている。ＷＬＡＮ機能を搭載した無線端末装置は、携帯電話システムおよびＷＬＡＮシステムの双方を切り替えて使用することが可能となる。 In recent years, it has been studied to install a wireless LAN (WLAN: Wireless Local Area Network) function in a wireless terminal device such as a mobile phone. A wireless terminal device equipped with a WLAN function can be used by switching both the mobile phone system and the WLAN system.
　また、ＷＬＡＮ機能を搭載した無線端末装置において、アクセスポイント（ＡＰ：Access Point）等を必要とせず、無線端末装置同士がＷＬＡＮによって接続できるアドホックネットワーク（ad hoc network）を構築することが検討されている。アドホックネットワークは、ＡＰ等のインフラ（Infrastructure）が存在しない場所でも簡易にネットワークを構築することができる。 In addition, in a wireless terminal device equipped with a WLAN function, it is considered to construct an ad hoc network in which wireless terminal devices can be connected to each other by WLAN without requiring an access point (AP). Yes. An ad hoc network can easily construct a network even in a place where an infrastructure such as an AP does not exist.
　ＷＬＡＮシステムにおいてアドホックネットワーク（つまり、アドホックモードのＷＬＡＮシステム）を構成するために、無線端末装置はビーコンを定期的に送信する。一方、アドホックネットワークに参加するために、無線端末装置はビーコンを定期的に検出（スキャン）する。そして、アドホックネットワークに参加する側、つまり、ビーコンを定期的に検出する無線端末装置（無線受信装置）は、目的とするアドホックネットワークのＳＳＩＤ（Service Set Identifier）を検出すると、アドホックネットワークを構成する側、つまり、ビーコンを送信する無線端末装置（無線送信装置）とのアドホック通信の接続動作を開始する。従来、無線送信装置は、一定間隔（例えば、送信周期１００ｍｓ）でビーコンを送信する（例えば、特許文献１および特許文献２参照）。 In order to configure an ad hoc network (that is, an ad hoc mode WLAN system) in the WLAN system, the wireless terminal device periodically transmits beacons. On the other hand, in order to participate in an ad hoc network, the wireless terminal device periodically detects (scans) a beacon. Then, when a side that participates in the ad hoc network, that is, a wireless terminal device (wireless receiving device) that periodically detects beacons detects an SSID (Service Set Identifier) of the target ad hoc network, the side that forms the ad hoc network That is, an ad hoc communication connection operation with a wireless terminal device (wireless transmission device) that transmits a beacon is started. Conventionally, a wireless transmission device transmits a beacon at regular intervals (for example, a transmission cycle of 100 ms) (see, for example, Patent Document 1 and Patent Document 2).
特開２００７－０１９８５６号公報JP 2007-019856 A 特開２００８－０７９３０６号公報JP 2008-079306 A
　上記従来技術のように、無線送信装置は、一定の間隔でビーコンを送信する。そのため、無線送信装置では、ビーコン送信のための消費電力を低く抑えるためには、ビーコンの送信間隔を長く設定することで、ビーコンの送信頻度を少なくすることが好ましい。 As in the above prior art, the wireless transmission device transmits beacons at regular intervals. Therefore, in the wireless transmission device, in order to keep power consumption for beacon transmission low, it is preferable to reduce the beacon transmission frequency by setting a long beacon transmission interval.
　一方、無線受信装置は、無線送信装置が送信するビーコンの送信タイミングを知らない。よって、無線受信装置は、一定の間隔で送信されるビーコンを検出するために、ビーコンの送信周期（例えば、１００ｍｓ）分だけ、ビーコンを連続受信する必要がある。そのため、無線受信装置では、ビーコンの連続受信のための消費電力を低く抑えるためには、無線送信装置からのビーコンの送信間隔を短くすることで、ビーコンの送信頻度が多くなることが好ましい。 On the other hand, the wireless reception device does not know the transmission timing of the beacon transmitted by the wireless transmission device. Therefore, in order to detect a beacon transmitted at regular intervals, the wireless reception device needs to continuously receive a beacon for a beacon transmission period (for example, 100 ms). Therefore, in order to keep the power consumption for continuous reception of beacons low in the wireless reception device, it is preferable that the beacon transmission frequency is increased by shortening the beacon transmission interval from the wireless transmission device.
　つまり、無線送信装置ではビーコンの送信間隔を長くするほど（送信頻度を少なくするほど）消費電力を低く抑えることできるのに対し、無線受信装置ではビーコンの送信間隔を短くするほど（送信頻度を多くするほど）消費電力を低く抑えることができる。このように、無線送信装置におけるビーコン送信時の消費電力と、無線受信装置におけるビーコン受信時の消費電力との間にはトレードオフの関係がある。 That is, the longer the beacon transmission interval (lower the transmission frequency) in the wireless transmission device, the lower the power consumption, whereas the shorter the beacon transmission interval (increase the transmission frequency) in the wireless reception device. The power consumption can be kept low. Thus, there is a trade-off relationship between the power consumption during beacon transmission in the wireless transmission device and the power consumption during beacon reception in the wireless reception device.
　本発明の目的は、ビーコンの送信側および受信側の双方で消費電力を低く抑えることができる無線受信装置、無線送信装置およびビーコン受信タイミング決定方法を提供することである。 An object of the present invention is to provide a wireless reception device, a wireless transmission device, and a beacon reception timing determination method capable of suppressing power consumption on both the beacon transmission side and the reception side.
　本発明の無線受信装置は、第１通信システム、および、前記第１通信システムと異なる第２通信システムを使用可能な無線受信装置であって、前記第１通信システムの基地局装置が送信する制御信号の送信タイミングに同期して、前記第２通信システムで用いるビーコンの受信タイミングを決定する決定手段と、前記受信タイミングに従って、前記ビーコンを受信する受信手段と、を具備する構成を採る。 The radio reception apparatus of the present invention is a radio reception apparatus that can use a first communication system and a second communication system different from the first communication system, and a control transmitted by a base station apparatus of the first communication system. A configuration is provided that includes a determination unit that determines a reception timing of a beacon used in the second communication system in synchronization with a signal transmission timing, and a reception unit that receives the beacon according to the reception timing.
　本発明の無線送信装置は、第１通信システム、および、前記第１通信システムと異なる第２通信システムを使用可能な無線送信装置であって、前記第１通信システムの基地局装置が送信する制御信号の送信タイミングに同期して、前記第２通信システムで用いるビーコンの送信タイミングを決定する決定手段と、前記送信タイミングに従って、前記ビーコンを送信する送信手段と、を具備する構成を採る。 The radio transmission apparatus of the present invention is a radio transmission apparatus that can use a first communication system and a second communication system different from the first communication system, and a control transmitted by a base station apparatus of the first communication system. A configuration is provided that includes a determination unit that determines a transmission timing of a beacon used in the second communication system in synchronization with a transmission timing of a signal, and a transmission unit that transmits the beacon according to the transmission timing.
　本発明のビーコン受信タイミング決定方法は、第１通信システムの基地局装置が送信する制御信号の送信タイミングに同期して、前記第１通信システムと異なる第２通信システムで用いるビーコンの受信タイミングを決定するようにした。 The beacon reception timing determination method of the present invention determines a beacon reception timing used in a second communication system different from the first communication system in synchronization with a transmission timing of a control signal transmitted by a base station apparatus of the first communication system. I tried to do it.
　本発明によれば、ビーコンの送信側および受信側の双方で消費電力を低く抑えることができる。 According to the present invention, power consumption can be kept low on both the beacon transmission side and the reception side.
本発明の無線通信システムを示す図The figure which shows the radio | wireless communications system of this invention 本発明の実施の形態１に係る無線送信装置の構成を示すブロック図1 is a block diagram showing a configuration of a wireless transmission device according to Embodiment 1 of the present invention. 本発明の実施の形態１に係る無線受信装置の構成を示すブロック図FIG. 2 is a block diagram showing a configuration of a radio reception apparatus according to Embodiment 1 of the present invention. 本発明の実施の形態１に係るビーコンの送受信処理の詳細を示す図The figure which shows the detail of the transmission / reception process of the beacon which concerns on Embodiment 1 of this invention. 本発明の実施の形態２に係る無線送信装置の構成を示すブロック図The block diagram which shows the structure of the radio | wireless transmitter which concerns on Embodiment 2 of this invention. 本発明の実施の形態２に係る無線受信装置の構成を示すブロック図The block diagram which shows the structure of the radio | wireless receiver which concerns on Embodiment 2 of this invention. 本発明の実施の形態３に係る無線送信装置の構成を示すブロック図The block diagram which shows the structure of the radio | wireless transmitter which concerns on Embodiment 3 of this invention. 本発明の実施の形態３に係る無線受信装置の構成を示すブロック図The block diagram which shows the structure of the radio | wireless receiver which concerns on Embodiment 3 of this invention. 本発明の実施の形態４に係る無線送信装置の構成を示すブロック図The block diagram which shows the structure of the radio | wireless transmitter which concerns on Embodiment 4 of this invention. 本発明の実施の形態４に係る無線受信装置の構成を示すブロック図FIG. 9 is a block diagram showing a configuration of a radio reception apparatus according to Embodiment 4 of the present invention.
　以下、本発明の実施の形態について、添付図面を参照して詳細に説明する。一例として、図１に本発明の各実施の形態に係る無線通信システムの構成を示す。図１では、携帯電話システムの基地局（携帯電話基地局）のカバーエリア（携帯電話エリア）内に、携帯電話機Ａおよび携帯電話機Ｂが位置する。また、図１に示す基地局は、自局のカバーエリアに位置する端末に対して、自局の基地局ＩＤ等を含む報知信号を周期的に報知する。例えば、報知信号の送信周期は２．５６ｓである。 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. As an example, FIG. 1 shows a configuration of a wireless communication system according to each embodiment of the present invention. In FIG. 1, a mobile phone A and a mobile phone B are located in a cover area (mobile phone area) of a base station (mobile phone base station) of the mobile phone system. Further, the base station shown in FIG. 1 periodically broadcasts a broadcast signal including the base station ID of the local station to terminals located in the cover area of the local station. For example, the transmission cycle of the notification signal is 2.56 s.
　また、図１に示す携帯電話機Ａおよび携帯電話機Ｂは、アドホックモードのＷＬＡＮシステムにおいてアドホック通信を行う。すなわち、携帯電話機Ａおよび携帯電話機Ｂにより図１に示すＷＬＡＮエリアが構成される。つまり、携帯電話機Ａおよび携帯電話機Ｂは、携帯電話システムおよびＷＬＡＮシステムの双方を使用することが可能である。 Further, the mobile phone A and the mobile phone B shown in FIG. 1 perform ad hoc communication in the ad hoc mode WLAN system. That is, the cellular phone A and the cellular phone B constitute the WLAN area shown in FIG. That is, the mobile phone A and the mobile phone B can use both the mobile phone system and the WLAN system.
　また、図１に示す携帯電話機Ａおよび携帯電話機Ｂは、各実施の形態に係る無線送信装置および無線受信装置の双方を搭載する。そして、各携帯電話機は、自機がアドホックモードのＷＬＡＮシステムを構成する側であるか、アドホックモードのＷＬＡＮシステムに参加する側であるかに応じて、本発明の各実施の形態に係る無線送信装置の動作および無線受信装置の動作を切り替えて使用する。ただし、図１では、アドホック通信時には、携帯電話機Ａがビーコンを送信し、携帯電話機Ｂがビーコンを検出する。つまり、図１では、ビーコンを送信する携帯電話機Ａは本発明の各実施の形態に係る無線送信装置として動作し、ビーコンを受信する携帯電話機Ｂは本発明の各実施の形態に係る無線受信装置として動作する。 Further, the mobile phone A and the mobile phone B shown in FIG. 1 are equipped with both the radio transmission device and the radio reception device according to each embodiment. Each mobile phone performs wireless transmission according to each embodiment of the present invention, depending on whether the mobile phone is a side constituting an ad hoc mode WLAN system or a side participating in the ad hoc mode WLAN system. The operation of the device and the operation of the wireless reception device are switched and used. However, in FIG. 1, at the time of ad hoc communication, the mobile phone A transmits a beacon, and the mobile phone B detects the beacon. That is, in FIG. 1, a mobile phone A that transmits a beacon operates as a wireless transmission device according to each embodiment of the present invention, and a mobile phone B that receives a beacon is a wireless reception device according to each embodiment of the present invention. Works as.
　（実施の形態１）
　本実施の形態に係る無線送信装置１００の構成を図２に示し、本実施の形態に係る無線受信装置２００の構成を図３に示す。 (Embodiment 1)
FIG. 2 shows the configuration of radio transmitting apparatus 100 according to the present embodiment, and FIG. 3 shows the configuration of radio receiving apparatus 200 according to the present embodiment.
　図２に示す無線送信装置１００において、携帯電話処理部１０２の無線部１０３は、図１に示す携帯電話システムの基地局（図１）から報知される報知信号を、アンテナ１０１（携帯電話用アンテナ）を介して受信する。そして、無線部１０３は、受信した報知信号をタイミング検出部１０４に出力する。 In the wireless transmission device 100 shown in FIG. 2, the wireless unit 103 of the mobile phone processing unit 102 transmits a notification signal notified from the base station (FIG. 1) of the mobile phone system shown in FIG. ) Via. Radio section 103 then outputs the received notification signal to timing detection section 104.
　携帯電話処理部１０２のタイミング検出部１０４は、無線部１０３から入力される報知信号に基づいて、報知信号の送信タイミングを検出する。そして、タイミング検出部１０４は、検出した報知信号の送信タイミングを、ＷＬＡＮ処理部１０５の決定部１０６に出力する。 The timing detection unit 104 of the mobile phone processing unit 102 detects the transmission timing of the notification signal based on the notification signal input from the wireless unit 103. Then, the timing detection unit 104 outputs the detected transmission timing of the notification signal to the determination unit 106 of the WLAN processing unit 105.
　ＷＬＡＮ処理部１０５の決定部１０６は、タイミング検出部１０４から入力される、報知信号の送信タイミングに基づいて、ＷＬＡＮシステムで用いるビーコンの送信タイミングを決定する。具体的には、決定部１０６は、携帯電話システムの基地局が送信する報知信号の送信タイミングに同期して、ＷＬＡＮシステムで用いるビーコンの送信タイミングを決定する。つまり、決定部１０６は、自装置が属する基地局から送信される報知信号の送信タイミングを、ビーコンの送信タイミングとして決定する。例えば、基地局から報知される報知信号の送信タイミングが一定間隔の場合、決定部１０６は、報知信号の送信周期と同期して、ビーコンの送信周期を決定する。そして、決定部１０６は、決定したビーコンの送信タイミングをＷＬＡＮ送信部１０７に出力する。 The determination unit 106 of the WLAN processing unit 105 determines the transmission timing of the beacon used in the WLAN system based on the transmission timing of the notification signal input from the timing detection unit 104. Specifically, the determination unit 106 determines the transmission timing of the beacon used in the WLAN system in synchronization with the transmission timing of the notification signal transmitted by the base station of the mobile phone system. That is, the determination unit 106 determines the transmission timing of the notification signal transmitted from the base station to which the own device belongs as the beacon transmission timing. For example, when the transmission timing of the notification signal notified from the base station is constant, the determination unit 106 determines the beacon transmission cycle in synchronization with the notification signal transmission cycle. Then, the determination unit 106 outputs the determined beacon transmission timing to the WLAN transmission unit 107.
　ＷＬＡＮ処理部１０５のＷＬＡＮ送信部１０７は、決定部１０６から入力されるビーコンの送信タイミングに従って、アンテナ１０８（ＷＬＡＮ用アンテナ）を介してビーコンを送信する。 The WLAN transmission unit 107 of the WLAN processing unit 105 transmits a beacon via the antenna 108 (WLAN antenna) according to the beacon transmission timing input from the determination unit 106.
　一方、図３に示す無線受信装置２００において、携帯電話処理部２０２は、無線送信装置１００の携帯電話処理部１０２（図２）と同様の構成を採る。すなわち、携帯電話処理部２０２の無線部２０３は、無線部１０３（図２）と同様、基地局（図１）から報知される報知信号を、アンテナ２０１（携帯電話用アンテナ）を介して受信する。また、携帯電話処理部２０２のタイミング検出部２０４は、タイミング検出部１０４（図２）と同様、無線部２０３から入力される報知信号に基づいて、報知信号の送信タイミングを検出する。そして、タイミング検出部２０４は、検出した報知信号の送信タイミングを、ＷＬＡＮ処理部２０５の決定部２０６に出力する。 On the other hand, in the wireless reception device 200 shown in FIG. 3, the mobile phone processing unit 202 has the same configuration as the mobile phone processing unit 102 (FIG. 2) of the wireless transmission device 100. That is, the radio unit 203 of the mobile phone processing unit 202 receives the notification signal notified from the base station (FIG. 1) via the antenna 201 (cell phone antenna), similarly to the radio unit 103 (FIG. 2). . Similarly to the timing detection unit 104 (FIG. 2), the timing detection unit 204 of the mobile phone processing unit 202 detects the transmission timing of the notification signal based on the notification signal input from the wireless unit 203. Then, the timing detection unit 204 outputs the detected transmission timing of the notification signal to the determination unit 206 of the WLAN processing unit 205.
　ＷＬＡＮ処理部２０５の決定部２０６は、タイミング検出部２０４から入力される、報知信号の送信タイミングに基づいて、ＷＬＡＮシステムで用いるビーコンの受信タイミングを決定する。具体的には、決定部２０６は、携帯電話システムの基地局が送信する報知信号の送信タイミングに同期して、ＷＬＡＮシステムで用いるビーコンの受信タイミングを決定する。つまり、決定部２０６は、自装置が属する基地局から送信される報知信号の送信タイミングを、ビーコンの受信タイミングとして決定する。例えば、基地局から報知される報知信号の送信タイミングが一定間隔の場合、決定部２０６は、報知信号の送信周期と同期して、ビーコンの受信周期を決定する。そして、決定部２０６は、決定したビーコンの受信タイミングをＷＬＡＮ受信部２０７に出力する。 The determination unit 206 of the WLAN processing unit 205 determines the reception timing of the beacon used in the WLAN system based on the transmission timing of the notification signal input from the timing detection unit 204. Specifically, the determination unit 206 determines the reception timing of the beacon used in the WLAN system in synchronization with the transmission timing of the notification signal transmitted by the base station of the mobile phone system. That is, the determination unit 206 determines the transmission timing of the notification signal transmitted from the base station to which the own device belongs as the beacon reception timing. For example, when the transmission timing of the notification signal notified from the base station is constant, the determination unit 206 determines the beacon reception period in synchronization with the transmission period of the notification signal. Then, the determination unit 206 outputs the determined beacon reception timing to the WLAN reception unit 207.
　ＷＬＡＮ処理部２０５のＷＬＡＮ受信部２０７は、決定部２０６から入力されるビーコンの受信タイミングに従って、アンテナ２０８（ＷＬＡＮ用アンテナ）を介してビーコンを受信する。 The WLAN reception unit 207 of the WLAN processing unit 205 receives a beacon via the antenna 208 (WLAN antenna) according to the beacon reception timing input from the determination unit 206.
　次に、本実施の形態に係る無線送信装置１００（図２）および無線受信装置２００（図３）におけるビーコンの送受信処理の詳細について説明する。 Next, details of beacon transmission / reception processing in radio transmitting apparatus 100 (FIG. 2) and radio receiving apparatus 200 (FIG. 3) according to the present embodiment will be described.
　以下の説明では、図１に示す携帯電話機Ａが無線送信装置１００として動作し、携帯電話機Ｂが無線受信装置２００として動作する。つまり、携帯電話機Ａ（無線送信装置１００）がビーコンを送信し、携帯電話機Ｂ（無線受信装置２００）がビーコンを受信する。 In the following description, the mobile phone A shown in FIG. 1 operates as the wireless transmission device 100, and the mobile phone B operates as the wireless reception device 200. That is, the mobile phone A (wireless transmission device 100) transmits a beacon, and the mobile phone B (wireless reception device 200) receives the beacon.
　図４に示すように、基地局が報知した報知信号を受信すると、携帯電話機Ａ（無線送信装置１００）のタイミング検出部１０４および携帯電話機Ｂ（無線受信装置２００）のタイミング検出部２０４は、報知信号の送信タイミングを検出する。 As shown in FIG. 4, when the notification signal notified by the base station is received, the timing detection unit 104 of the mobile phone A (wireless transmission device 100) and the timing detection unit 204 of the mobile phone B (wireless reception device 200) Detect signal transmission timing.
　そして、図４に示すように、携帯電話機Ａ（無線送信装置１００）の決定部１０６は、報知信号の送信タイミングを、ビーコンの送信タイミングに決定する。つまり、決定部１０６は、報知信号の送信タイミングに同期して、ビーコンの送信タイミングを決定する。そして、図４に示すように、携帯電話機Ａ（無線送信装置１００）のＷＬＡＮ送信部１０７は、決定部１０６で決定したビーコンの送信タイミング（つまり、報知信号の送信タイミング）でビーコンを送信する。 And as shown in FIG. 4, the determination part 106 of the mobile telephone A (radio | wireless transmitter 100) determines the transmission timing of an alerting | reporting signal to the transmission timing of a beacon. That is, the determination unit 106 determines the beacon transmission timing in synchronization with the notification signal transmission timing. Then, as illustrated in FIG. 4, the WLAN transmission unit 107 of the mobile phone A (wireless transmission device 100) transmits a beacon at the beacon transmission timing determined by the determination unit 106 (that is, the notification signal transmission timing).
　同様にして、図４に示すように、携帯電話機Ｂ（無線受信装置２００）の決定部２０６は、報知信号の送信タイミングを、ビーコンの受信タイミングに決定する。つまり、決定部２０６は、報知信号の送信タイミングに同期して、ビーコンの受信タイミングを決定する。そして、携帯電話機Ｂ（無線受信装置２００）のＷＬＡＮ受信部２０７は、決定部２０６で決定したビーコンの受信タイミング（つまり、報知信号の送信タイミング）で、ビーコンを受信する。 Similarly, as shown in FIG. 4, the determination unit 206 of the mobile phone B (wireless reception device 200) determines the transmission timing of the notification signal as the reception timing of the beacon. That is, the determination unit 206 determines the beacon reception timing in synchronization with the notification signal transmission timing. Then, the WLAN receiver 207 of the mobile phone B (wireless receiver 200) receives the beacon at the beacon reception timing determined by the determination unit 206 (that is, the notification signal transmission timing).
　このようにして、無線送信装置１００および無線受信装置２００は、携帯電話システムで用いる報知信号の送信タイミングと同期して、ＷＬＡＮシステムで用いるビーコンの送信タイミングおよび受信タイミングをそれぞれ決定する。つまり、無線受信装置２００は、基地局が報知する報知信号の送信タイミングを検出することにより、無線送信装置１００におけるビーコンの送信タイミングを特定することができる。これにより、無線受信装置２００は、ビーコンの各送信タイミング（図４では送信周期２．５６ｓ）でのみビーコンを検出すればよい。すなわち、無線受信装置２００は、ビーコンの送信周期（図４では２．５６ｓ）分だけ、ビーコンの連続受信を行わなくてもよい。 In this way, the wireless transmission device 100 and the wireless reception device 200 determine the transmission timing and reception timing of the beacon used in the WLAN system in synchronization with the transmission timing of the notification signal used in the mobile phone system. That is, the wireless reception device 200 can identify the transmission timing of the beacon in the wireless transmission device 100 by detecting the transmission timing of the notification signal notified by the base station. Thereby, the radio | wireless receiver 200 should just detect a beacon only at each transmission timing (in FIG. 4, transmission cycle 2.56s). That is, the wireless reception device 200 may not continuously receive beacons for the beacon transmission period (2.56 s in FIG. 4).
　例えば、従来のビーコンの送信周期１００ｍｓと比較すると、図４ではビーコンの送信周期は２．５６ｓであり、従来のビーコンの送信周期よりも十分に長い。つまり、無線送信装置１００は、より長い送信間隔でビーコンを送信することで、ビーコンの送信頻度を少なくすることができるので、ビーコン送信のための消費電力を低く抑えることができる。また、上述したように、無線受信装置２００は、ビーコンの送信周期が長くなる場合でも、ビーコンの送信周期２．５６ｓだけビーコンを連続受信（連続スキャン）するのではなく、ビーコンの送信周期２．５６ｓ毎にビーコンを受信（スキャン）すればよい。よって、無線受信装置２００では、ビーコン受信のための消費電力を低く抑えることができる。 For example, in comparison with the conventional beacon transmission cycle of 100 ms, the beacon transmission cycle in FIG. 4 is 2.56 s, which is sufficiently longer than the conventional beacon transmission cycle. That is, since the wireless transmission device 100 can reduce the frequency of beacon transmission by transmitting beacons at longer transmission intervals, the power consumption for beacon transmission can be kept low. In addition, as described above, the wireless reception device 200 does not continuously receive (continuous scan) beacons for the beacon transmission cycle of 2.56 s, even when the beacon transmission cycle becomes long, but instead of the beacon transmission cycle 2. A beacon may be received (scanned) every 56 s. Therefore, in the wireless reception device 200, the power consumption for beacon reception can be kept low.
　このように、本実施の形態によれば、アドホック通信を行う無線送信装置および無線受信装置は、自装置が属する、携帯電話システムの基地局が報知する報知信号の送信タイミングと同期して、ＷＬＡＮシステムで用いるビーコンの送信タイミングおよび受信タイミングをそれぞれ決定する。これにより、無線送信装置は、報知信号の送信タイミング（例えば送信周期２．５６ｓ）と同期してビーコンを送信するので、従来のビーコン送信頻度（例えば１００ｍｓ毎のビーコン送信）よりもビーコンの送信頻度を少なくすることが可能となる。これにより、無線送信装置では、ビーコン送信時の消費電力を低減することができる。また、無線受信装置は、無線送信装置と同様にして報知信号の送信タイミングと同期してビーコンを受信するので、無線送信装置からのビーコンの送信タイミングを特定できる。このため、無線受信装置は、ビーコンの送信間隔が長くなる場合（送信頻度が少なくなる場合）でも、ビーコンの連続受信（連続スキャン）を行うことなく、ビーコンを受信することができる。よって、無線受信装置では、ビーコンの受信時の消費電力を低く抑えることができる。よって、本実施の形態によれば、ビーコンの送信側および受信側の双方で消費電力を低く抑えることができる。 Thus, according to the present embodiment, the wireless transmission device and the wireless reception device that perform ad hoc communication are synchronized with the transmission timing of the notification signal notified by the base station of the mobile phone system to which the device belongs. The beacon transmission timing and reception timing used in the system are respectively determined. Thereby, since the wireless transmission device transmits a beacon in synchronization with the transmission timing of the notification signal (for example, transmission cycle 2.56 s), the beacon transmission frequency is higher than the conventional beacon transmission frequency (for example, beacon transmission every 100 ms). Can be reduced. Thereby, in a wireless transmission device, the power consumption at the time of beacon transmission can be reduced. Further, since the wireless reception device receives the beacon in synchronization with the transmission timing of the notification signal in the same manner as the wireless transmission device, the transmission timing of the beacon from the wireless transmission device can be specified. Therefore, even when the beacon transmission interval becomes long (when the transmission frequency decreases), the wireless reception device can receive the beacon without performing continuous reception (continuous scanning) of the beacon. Therefore, in the wireless reception device, the power consumption at the time of receiving the beacon can be kept low. Therefore, according to the present embodiment, the power consumption can be kept low on both the beacon transmission side and the reception side.
　（実施の形態２）
　本実施の形態では、無線送信装置および無線受信装置は、予め設定された基地局ＩＤと同一の基地局ＩＤを報知信号から検出した場合、ビーコンの送受信を開始する。 (Embodiment 2)
In the present embodiment, the radio transmission device and the radio reception device start transmitting and receiving beacons when a base station ID identical to a preset base station ID is detected from the notification signal.
　本実施の形態に係る無線送信装置３００の構成を図５に示し、本実施の形態に係る無線受信装置４００の構成を図６に示す。なお、図５および図６において実施の形態１（図２および図３）と同一の構成部には同一符号を付し説明を省略する。 FIG. 5 shows the configuration of radio transmitting apparatus 300 according to the present embodiment, and FIG. 6 shows the configuration of radio receiving apparatus 400 according to the present embodiment. In FIGS. 5 and 6, the same components as those in the first embodiment (FIGS. 2 and 3) are denoted by the same reference numerals, and description thereof is omitted.
　図５に示す無線送信装置３００において、携帯電話処理部１０２の基地局ＩＤ検出部３０１には、報知信号がタイミング検出部１０４から入力される。そして、基地局ＩＤ検出部３０１は、タイミング検出部１０４から入力される報知信号から、基地局ＩＤ（すなわち、報知信号送信元の基地局の基地局ＩＤ）を検出する。そして、基地局ＩＤ検出部３０１は、検出した基地局ＩＤを照合部３０２に出力する。 In the wireless transmission device 300 shown in FIG. 5, a notification signal is input from the timing detection unit 104 to the base station ID detection unit 301 of the mobile phone processing unit 102. Then, the base station ID detection unit 301 detects the base station ID (that is, the base station ID of the base station that transmitted the notification signal) from the notification signal input from the timing detection unit 104. Base station ID detection section 301 then outputs the detected base station ID to collation section 302.
　照合部３０２は、特定の基地局の基地局ＩＤを予め記憶している。照合部３０２は、基地局ＩＤ検出部３０１から入力される基地局ＩＤと、予め記憶されている基地局ＩＤとを照合する。そして、照合部３０２は、照合の結果、基地局ＩＤ検出部３０１から入力される基地局ＩＤが、予め記憶されている基地局ＩＤと同一の場合、ビーコンの送信開始を示す情報をＷＬＡＮ送信部１０７に出力する。 The collation unit 302 stores a base station ID of a specific base station in advance. The collation unit 302 collates the base station ID input from the base station ID detection unit 301 with the base station ID stored in advance. Then, as a result of the collation, when the base station ID input from the base station ID detection unit 301 is the same as the base station ID stored in advance, the collation unit 302 displays information indicating the start of beacon transmission as a WLAN transmission unit. It outputs to 107.
　ＷＬＡＮ送信部１０７は、照合部３０２から、ビーコンの送信開始を示す情報が入力される場合、実施の形態１と同様にして決定部１０６で決定された送信タイミングに従って、ビーコンの送信を開始する。 When the information indicating the start of beacon transmission is input from collator 302, WLAN transmitter 107 starts beacon transmission according to the transmission timing determined by determination unit 106 in the same manner as in the first embodiment.
　一方、図６に示す無線受信装置４００において、携帯電話処理部２０２は、無線送信装置３００の携帯電話処理部１０２（図５）と同様の構成を採る。すなわち、携帯電話処理部２０２の基地局ＩＤ検出部４０１は、携帯電話処理部１０２の基地局ＩＤ検出部３０１（図５）と同様の処理を行う。 On the other hand, in the wireless reception device 400 shown in FIG. 6, the mobile phone processing unit 202 has the same configuration as the mobile phone processing unit 102 (FIG. 5) of the wireless transmission device 300. That is, the base station ID detection unit 401 of the mobile phone processing unit 202 performs the same processing as the base station ID detection unit 301 (FIG. 5) of the mobile phone processing unit 102.
　また、図６に示す無線受信装置４００において、照合部４０２は、無線送信装置３００の照合部３０２と同様の処理を行う。すなわち、照合部４０２は、基地局ＩＤ検出部４０１から入力される基地局ＩＤが、予め記憶されている基地局ＩＤと同一の場合、ビーコンの受信開始を示す情報をＷＬＡＮ受信部２０７に出力する。 In the wireless reception device 400 illustrated in FIG. 6, the collation unit 402 performs the same processing as the collation unit 302 of the wireless transmission device 300. That is, collation section 402 outputs information indicating beacon reception start to WLAN reception section 207 when the base station ID input from base station ID detection section 401 is the same as the prestored base station ID. .
　そして、ＷＬＡＮ受信部２０７は、照合部４０２から、ビーコンの受信開始を示す情報が入力される場合、実施の形態１と同様にして決定部２０６で決定された受信タイミングに従って、ビーコンの受信を開始する。 When receiving information indicating beacon reception start from collation unit 402, WLAN reception unit 207 starts receiving beacon according to the reception timing determined by determination unit 206 as in the first embodiment. To do.
　これにより、例えば、図１に示す携帯電話機Ａ（無線送信装置３００）および携帯電話機Ｂ（無線受信装置４００）は、特定の基地局（つまり、照合部３０２および照合部４０２に予め記憶されている基地局ＩＤの基地局）のカバーエリア内でのみ、ＷＬＡＮシステムで用いるビーコンの送受信（例えば、図４に示すビーコンの送受信）を行う。つまり、図１に示す携帯電話機Ａ（無線送信装置３００）および携帯電話機Ｂ（無線受信装置４００）は、特定の基地局のカバーエリア内でのみアドホック通信を行う。すなわち、図１に示す携帯電話機Ａ（無線送信装置３００）および携帯電話機Ｂ（無線受信装置４００）は、特定の基地局のカバーエリア以外ではアドホック通信を行わない。 Thereby, for example, the mobile phone A (wireless transmission device 300) and the mobile phone B (wireless reception device 400) shown in FIG. 1 are stored in advance in specific base stations (that is, the matching unit 302 and the matching unit 402). Beacon transmission / reception (for example, transmission / reception of beacons shown in FIG. 4) used in the WLAN system is performed only within the coverage area of the base station with the base station ID. That is, the mobile phone A (wireless transmitter 300) and the mobile phone B (wireless receiver 400) shown in FIG. 1 perform ad hoc communication only within the coverage area of a specific base station. That is, mobile phone A (wireless transmitter 300) and mobile phone B (wireless receiver 400) shown in FIG. 1 do not perform ad hoc communication except in the coverage area of a specific base station.
　例えば、図１に示す携帯電話機Ａ（無線送信装置３００）および携帯電話機Ｂ（無線受信装置４００）は、アドホック通信を行うエリアとして自宅または待ち合わせ場所等の特定のエリアに対応する基地局の基地局ＩＤを予め記憶する。そして、図１に示す携帯電話機Ａ（無線送信装置３００）および携帯電話機Ｂ（無線受信装置４００）は、自宅または待ち合わせ場所等の特定のエリアに位置する場合には、特定のエリアに対応する基地局から報知信号を受信し、基地局の基地局ＩＤを検出する。そして、携帯電話機Ａ（無線送信装置３００）および携帯電話機Ｂ（無線受信装置４００）は、予め記憶している基地局ＩＤと検出した基地局ＩＤとを照合することで、アドホック通信を行うエリアであるか否かを判断する。これにより、携帯電話機Ａ（無線送信装置３００）および携帯電話機Ｂ（無線受信装置４００）は、特定の基地局のカバーエリア内でのみ、図４に示すようにＷＬＡＮシステムで用いるビーコンの送受信を開始することによりアドホック通信を行う。 For example, the mobile phone A (wireless transmitter 300) and the mobile phone B (wireless receiver 400) shown in FIG. 1 are base stations of base stations corresponding to a specific area such as a home or a meeting place as an area for performing ad hoc communication. ID is stored in advance. When mobile phone A (wireless transmission device 300) and mobile phone B (wireless reception device 400) shown in FIG. 1 are located in a specific area such as a home or a meeting place, bases corresponding to the specific area are provided. The broadcast signal is received from the station, and the base station ID of the base station is detected. The mobile phone A (wireless transmission device 300) and the mobile phone B (wireless reception device 400) collate the base station ID stored in advance with the detected base station ID, thereby performing ad hoc communication. Judge whether there is. Thereby, mobile phone A (wireless transmitter 300) and mobile phone B (wireless receiver 400) start transmission / reception of beacons used in the WLAN system as shown in FIG. 4 only within the coverage area of the specific base station. To perform ad hoc communication.
　このようにして、本実施の形態によれば、実施の形態１と同様、ビーコンの送信側および受信側の双方で消費電力を低く抑えることができる。さらに、本実施の形態によれば、無線送信装置および無線受信装置は、予め記憶している特定の基地局のカバーエリア、すなわち、アドホック通信を行うエリアのみでビーコンの送受信を開始するため、ビーコンの送信側および受信側の双方で消費電力をさらに低く抑えることができる。 Thus, according to the present embodiment, similarly to the first embodiment, it is possible to reduce power consumption on both the beacon transmission side and the reception side. Furthermore, according to the present embodiment, the radio transmission device and the radio reception device start transmitting and receiving beacons only in the coverage area of a specific base station stored in advance, that is, in an area where ad hoc communication is performed. The power consumption can be further reduced on both the transmitting side and the receiving side.
　（実施の形態３）
　本実施の形態では、無線送信装置および無線受信装置は、特定の位置を入力し、入力された特定の位置に対応する基地局ＩＤと同一の基地局ＩＤを報知信号から検出した場合、実施の形態１と同様にして、ビーコンの送受信を開始する。 (Embodiment 3)
In the present embodiment, when the wireless transmission device and the wireless reception device input a specific position and detect from the broadcast signal the same base station ID as the base station ID corresponding to the input specific position, In the same manner as in mode 1, transmission / reception of beacons is started.
　本実施の形態に係る無線送信装置５００の構成を図７に示し、本実施の形態に係る無線受信装置６００の構成を図８に示す。なお、図７および図８において実施の形態２（図５および図６）と同一の構成部には同一符号を付し説明を省略する。 7 shows the configuration of radio transmitting apparatus 500 according to the present embodiment, and FIG. 8 shows the configuration of radio receiving apparatus 600 according to the present embodiment. 7 and 8, the same components as those of the second embodiment (FIGS. 5 and 6) are denoted by the same reference numerals, and description thereof is omitted.
　図７に示す無線送信装置５００において、入力部５０１は、例えば操作入力により、特定の位置を入力する。例えば、入力部５０１は、ＧＰＳ（Global Positioning System）のマップ上において、ユーザの操作入力により指定された位置（例えば、待ち合わせ場所）を示す位置情報を生成する。そして、入力部５０１は、生成した位置情報を照合部３０２に出力する。 In the wireless transmission device 500 shown in FIG. 7, the input unit 501 inputs a specific position by, for example, an operation input. For example, the input unit 501 generates position information indicating a position (for example, a meeting place) designated by a user operation input on a GPS (Global Positioning System) map. Then, the input unit 501 outputs the generated position information to the collation unit 302.
　照合部３０２は、予め記憶されている複数の基地局ＩＤの中から、入力部５０１から入力される位置情報に示される位置に対応する基地局ＩＤを検索する。そして、照合部３０２は、検索した基地局ＩＤ（つまり、入力された特定の位置に対応する基地局の基地局ＩＤ）と、基地局ＩＤ検出部３０１から入力される基地局ＩＤ（報知信号送信元の基地局の基地局ＩＤ）とを照合する。そして、照合部３０２は、照合の結果、基地局ＩＤ検出部３０１から入力される基地局ＩＤが、検索した基地局ＩＤと同一の場合、ビーコンの送信開始を示す制御情報をＷＬＡＮ送信部１０７に出力する。 The collation unit 302 searches for a base station ID corresponding to the position indicated by the position information input from the input unit 501 from a plurality of base station IDs stored in advance. Then, the collation unit 302 searches the base station ID (that is, the base station ID of the base station corresponding to the input specific position) and the base station ID (notification signal transmission) input from the base station ID detection unit 301. The base station ID) of the original base station. Then, as a result of the collation, when the base station ID input from the base station ID detection unit 301 is the same as the searched base station ID, the collation unit 302 sends control information indicating the start of beacon transmission to the WLAN transmission unit 107. Output.
　一方、図８に示す無線受信装置６００において、入力部６０１は、無線送信装置５００の入力部５０１（図７）と同様の処理を行う。そして、照合部４０２は、照合部３０２（図７）と同様、予め記憶されている複数の基地局ＩＤの中から、入力部６０１から入力される位置情報に示される位置に対応する基地局ＩＤを検索する。そして、照合部４０２は、基地局ＩＤ検出部４０１から入力される基地局ＩＤが、検索した基地局ＩＤと同一の場合、ビーコンの受信開始を示す制御情報をＷＬＡＮ受信部２０７に出力する。 On the other hand, in the wireless reception device 600 shown in FIG. 8, the input unit 601 performs the same processing as the input unit 501 (FIG. 7) of the wireless transmission device 500. Then, as in the collation unit 302 (FIG. 7), the collation unit 402 is a base station ID corresponding to the position indicated by the positional information input from the input unit 601 out of a plurality of prestored base station IDs. Search for. Then, when the base station ID input from base station ID detection section 401 is the same as the searched base station ID, collation section 402 outputs control information indicating the start of beacon reception to WLAN reception section 207.
　つまり、無線送信装置５００は、入力部５０１で入力された特定の位置に対応する基地局の基地局ＩＤと同一の基地局ＩＤが報知信号から検出された場合のみ、決定部１０６で決定されたビーコンの送信タイミングに従って、ビーコンを送信する。同様に、無線受信装置６００は、入力部６０１で入力された特定の位置に対応する基地局の基地局ＩＤと同一の基地局ＩＤが報知信号から検出された場合のみ、決定部２０６で決定されたビーコンの受信タイミングに従って、ビーコンを受信する。 That is, the wireless transmission device 500 is determined by the determination unit 106 only when the same base station ID as the base station ID of the base station corresponding to the specific position input by the input unit 501 is detected from the broadcast signal. A beacon is transmitted according to the beacon transmission timing. Similarly, radio receiving apparatus 600 is determined by determining section 206 only when the same base station ID as the base station ID of the base station corresponding to the specific position input by input section 601 is detected from the broadcast signal. The beacon is received according to the received beacon timing.
　このようにして、本実施の形態によれば、アドホック通信が行われるエリアを操作入力により指定する場合でも、実施の形態２と同様の効果を得ることができる。 Thus, according to the present embodiment, even when an area where ad hoc communication is performed is designated by an operation input, the same effect as in the second embodiment can be obtained.
　（実施の形態４）
　本実施の形態では、無線送信装置および無線受信装置は、自装置またはアドホック通信相手のいずれか一方でも基地局の圏外（カバーエリア外）に位置する場合、予め設定されたビーコンの送受信タイミングに従って、ビーコンを送受信する。 (Embodiment 4)
In the present embodiment, when the wireless transmission device and the wireless reception device are located outside the base station area (outside the cover area) of either the own device or the ad hoc communication partner, according to the beacon transmission / reception timing set in advance, Send and receive beacons.
　本実施の形態に係る無線送信装置７００の構成を図９に示し、本実施の形態に係る無線受信装置８００の構成を図１０に示す。なお、図９および図１０において実施の形態１（図２および図３）と同一の構成部には同一符号を付し説明を省略する。 FIG. 9 shows the configuration of radio transmitting apparatus 700 according to the present embodiment, and FIG. 10 shows the configuration of radio receiving apparatus 800 according to the present embodiment. In FIG. 9 and FIG. 10, the same components as those in the first embodiment (FIGS. 2 and 3) are denoted by the same reference numerals, and description thereof is omitted.
　図９に示す無線送信装置７００において、携帯電話処理部１０２の圏外検出部７０１は、自装置またはアドホック通信相手における、携帯電話システムの基地局（図１）の圏内（カバーエリア内）から圏外（カバーエリア外）への移行、および、基地局の圏外から圏内への移行を検出する。具体的には、圏外検出部７０１は、自装置における、基地局の圏内から圏外へ移行または基地局の圏外から圏内への移行を検出すると、基地局の圏内から圏外への移行または基地局の圏外から圏内への移行を示す移行情報を無線部１０３に出力する。そして、無線部１０３は、移行情報をアドホック通信相手へ送信する。また、圏外検出部７０１は、無線部１０３から入力される、アドホック通信相手からの移行情報に基づいて、アドホック通信相手が基地局の圏内または圏外のいずれに位置するかを検出する。これにより、圏外検出部７０１は、自装置およびアドホック通信相手がそれぞれ基地局の圏内または圏外のいずれに位置するかを特定する。 In the wireless transmission device 700 shown in FIG. 9, the out-of-range detection unit 701 of the mobile phone processing unit 102 is out of the range (within the cover area) of the base station (FIG. 1) of the mobile phone system at the own device or the ad hoc communication partner ( Detecting a transition from outside the coverage area) and a transition from outside the coverage area of the base station to the coverage area. Specifically, when the out-of-service detection unit 701 detects that the base station shifts from the base station area to the out-of-service area or the base station from the out-of-service area to the service area, the out-of-service detection unit 701 Transition information indicating a transition from outside the service area to the service area is output to the wireless unit 103. Then, the wireless unit 103 transmits the transition information to the ad hoc communication partner. Further, the out-of-service detection unit 701 detects whether the ad hoc communication partner is located within or outside the base station based on the transition information from the ad hoc communication partner input from the wireless unit 103. Thereby, the out-of-service detection unit 701 specifies whether the own device and the ad hoc communication partner are located within or outside the base station.
　そして、圏外検出部７０１は、自装置またはアドホック通信相手のいずれか一方でも、基地局の圏外に位置する場合、自装置またはアドホック通信相手が基地局の圏外に位置することを示す情報を決定部１０６に出力する。一方、圏外検出部７０１は、自装置およびアドホック通信相手の双方が基地局の圏内に位置する場合、自装置およびアドホック通信相手の双方が基地局の圏内に位置することを示す情報を決定部１０６に出力する。 The out-of-service detection unit 701 determines information indicating that the self-device or the ad hoc communication partner is located outside the service area of the base station when either the own device or the ad hoc communication partner is located outside the service area of the base station. It outputs to 106. On the other hand, when both the own device and the ad hoc communication partner are located within the base station, the out-of-service detection unit 701 determines information indicating that both the own device and the ad hoc communication partner are located within the base station. Output to.
　決定部１０６は、圏外検出部７０１から、自装置またはアドホック通信相手が基地局の圏外に位置することを示す情報が入力される場合、ビーコンの送信タイミングを、予め設定された送信タイミングに決定する。一方、決定部１０６は、圏外検出部７０１から、自装置およびアドホック通信相手の双方が基地局の圏内に位置することを示す情報が入力される場合、実施の形態１と同様、タイミング検出部１０４から入力される報知信号の送信タイミングをビーコンの送信タイミングとして決定する。 When the information indicating that the own apparatus or the ad hoc communication partner is located outside the base station is input from the out-of-service detection unit 701, the determination unit 106 determines the beacon transmission timing as a preset transmission timing. . On the other hand, when the information indicating that both the own apparatus and the ad hoc communication partner are located within the base station is input from the out-of-range detection unit 701, the determination unit 106 is similar to the timing detection unit 104 in the first embodiment. Is determined as the beacon transmission timing.
　一方、図１０に示す無線受信装置８００において、携帯電話処理部２０２は、無線送信装置７００の携帯電話処理部１０２（図９）と同様の構成を採る。すなわち、携帯電話処理部２０２の圏外検出部８０１は、携帯電話処理部１０２の圏外検出部７０１（図９）と同様の処理を行う。 On the other hand, in the wireless reception device 800 shown in FIG. 10, the mobile phone processing unit 202 adopts the same configuration as the mobile phone processing unit 102 (FIG. 9) of the wireless transmission device 700. That is, the out-of-range detection unit 801 of the mobile phone processing unit 202 performs the same processing as the out-of-range detection unit 701 (FIG. 9) of the mobile phone processing unit 102.
　そして、決定部２０６は、圏外検出部８０１から、自装置またはアドホック通信相手が基地局の圏外に位置することを示す情報が入力される場合、ビーコンの受信タイミングを、予め設定された受信タイミング（決定部１０６で予め設定された送信タイミングと同一のタイミング）に決定する。一方、決定部２０６は、圏外検出部８０１から、自装置およびアドホック通信相手の双方が基地局の圏内に位置することを示す情報が入力される場合、実施の形態１と同様、タイミング検出部２０４から入力される報知信号の送信タイミングをビーコンの受信タイミングとして決定する。 Then, when information indicating that the own apparatus or the ad hoc communication partner is located outside the base station is input from the out-of-range detection unit 801, the determination unit 206 sets a beacon reception timing to a preset reception timing ( It is determined at the same timing as the transmission timing set in advance by the determination unit 106. On the other hand, when information indicating that both the own apparatus and the ad-hoc communication partner are located within the base station is input from the out-of-range detection unit 801, the determination unit 206 is the timing detection unit 204 as in the first embodiment. Is determined as the beacon reception timing.
　例えば、図１に示す携帯電話機Ａ（無線送信装置７００）が基地局のカバーエリア外に移行した場合について説明する。つまり、携帯電話機Ａ（無線送信装置７００）の圏外検出部７０１は、自装置が圏外に移行したことを検出する。また、ここでは、決定部１０６（図９）および決定部２０６（図１０）にはビーコンの送受信タイミングとして、１００ｍｓが予め設定されている。 For example, a case will be described in which the mobile phone A (wireless transmission device 700) shown in FIG. 1 moves out of the cover area of the base station. That is, the out-of-service detection unit 701 of the mobile phone A (wireless transmission device 700) detects that the own device has moved out of service. Here, 100 ms is set in advance as the beacon transmission / reception timing in determination unit 106 (FIG. 9) and determination unit 206 (FIG. 10).
　この場合、携帯電話機Ａ（無線送信装置７００）の無線部１０３は、自装置が圏外に移行したことを示す移行情報を携帯電話機Ｂ（無線受信装置８００）へ通知する。これにより、携帯電話機Ｂ（無線受信装置８００）の圏外検出部８０１は、アドホック通信相手である携帯電話機Ａ（無線送信装置７００）が圏外に移行したことを検出する。 In this case, the wireless unit 103 of the mobile phone A (wireless transmission device 700) notifies the mobile phone B (wireless reception device 800) of transition information indicating that the own device has moved out of service area. Thereby, the out-of-service detection unit 801 of the mobile phone B (wireless reception device 800) detects that the mobile phone A (wireless transmission device 700), which is an ad hoc communication partner, has moved out of service.
　そして、携帯電話機Ａ（無線送信装置７００）の決定部１０６および携帯電話機Ｂ（無線受信装置８００）の決定部２０６は、携帯電話機Ａ（無線送信装置７００）が基地局の圏外に位置するので、ビーコンの送信タイミング（受信タイミング）を予め設定された１００ｍｓに決定する。 Then, the determination unit 106 of the mobile phone A (wireless transmission device 700) and the determination unit 206 of the mobile phone B (wireless reception device 800) are such that the mobile phone A (wireless transmission device 700) is located outside the range of the base station. The beacon transmission timing (reception timing) is determined to be 100 ms set in advance.
　また、図１に示す携帯電話機Ａ（無線送信装置７００）が基地局のカバーエリア内に再び移行した場合には、携帯電話機Ａ（無線送信装置７００）の無線部１０３は、自装置が圏内に移行したことを示す移行情報を携帯電話機Ｂ（無線受信装置８００）へ通知する。これにより、携帯電話機Ｂ（無線受信装置８００）の圏外検出部８０１は、アドホック通信相手である携帯電話機Ａ（無線送信装置７００）が圏内に移行したことを検出する。 In addition, when the mobile phone A (wireless transmission device 700) shown in FIG. 1 moves again within the coverage area of the base station, the wireless unit 103 of the mobile phone A (wireless transmission device 700) is within range. The mobile phone B (wireless receiver 800) is notified of the transfer information indicating the transfer. Thereby, the out-of-service detection unit 801 of the mobile phone B (wireless reception device 800) detects that the mobile phone A (wireless transmission device 700), which is an ad hoc communication partner, has moved into the service area.
　そして、携帯電話機Ａ（無線送信装置７００）の決定部１０６および携帯電話機Ｂ（無線受信装置８００）の決定部２０６は、携帯電話機Ａ（無線送信装置７００）および携帯電話機Ｂ（無線受信装置８００）の双方が基地局の圏内に位置するので、実施の形態１と同様にして、図４に示すように、報知信号の送信タイミングを、ビーコンの送信タイミング（受信タイミング）として決定する。 Then, the determination unit 106 of the mobile phone A (wireless transmission device 700) and the determination unit 206 of the mobile phone B (wireless reception device 800) are the mobile phone A (wireless transmission device 700) and the mobile phone B (wireless reception device 800). Since both are located within the area of the base station, the transmission timing of the notification signal is determined as the transmission timing (reception timing) of the beacon as shown in FIG. 4 in the same manner as in the first embodiment.
　つまり、無線送信装置７００および無線受信装置８００は、自装置およびＷＬＡＮシステムにおけるアドホック通信相手の双方が、図１に示す基地局（携帯電話システムの基地局）の圏内（カバーエリア内）に位置する場合、決定部１０６および決定部２０６でそれぞれ決定された送信タイミングおよび受信タイミングに従って、ビーコンを送受信する。一方、無線送信装置７００および無線受信装置８００は、自装置またはＷＬＡＮシステムにおけるアドホック通信相手のいずれか一方でも、図１に示す基地局（携帯電話システムの基地局）の圏外（カバーエリア外）に位置する場合、予め設定された送信タイミングおよび受信タイミングに従って、ビーコンを送受信する。 That is, in the wireless transmission device 700 and the wireless reception device 800, both the own device and the ad hoc communication partner in the WLAN system are located within the coverage (in the cover area) of the base station (base station of the mobile phone system) shown in FIG. In this case, beacons are transmitted and received according to the transmission timing and the reception timing determined by the determination unit 106 and the determination unit 206, respectively. On the other hand, the wireless transmission device 700 and the wireless reception device 800 are either out of the base station (base station of the mobile phone system) shown in FIG. When located, a beacon is transmitted / received according to a preset transmission timing and reception timing.
　このようにして、本実施の形態によれば、アドホック通信を行う端末のいずれか一方が基地局の圏外（カバーエリア外）に移行した場合には、予め設定されたタイミングを用いてビーコンの送受信を行う。よって、本実施の形態によれば、基地局の圏外（カバーエリア外）にアドホック通信を行う端末のいずれか一方が位置する場合でも、ビーコンの送受信が可能となり、アドホック通信を行うことができる。また、基地局の圏内（カバーエリア内）にアドホック通信を行う端末の双方が位置する場合には、実施の形態１と同様の効果を得ることができる。 Thus, according to the present embodiment, when any one of the terminals performing ad hoc communication moves out of the base station coverage area (out of the cover area), beacon transmission / reception is performed using a preset timing. I do. Therefore, according to the present embodiment, even when any one of the terminals that perform ad hoc communication is located outside the base station coverage area (out of the cover area), beacon can be transmitted and received, and ad hoc communication can be performed. Further, when both terminals that perform ad hoc communication are located within the base station area (within the cover area), the same effect as in the first embodiment can be obtained.
　以上、本発明の各実施の形態について説明した。 The embodiments of the present invention have been described above.
　２００９年６月２２日出願の特願２００９－１４７８１５の日本出願に含まれる明細書、図面および要約書の開示内容は、すべて本願に援用される。 The disclosure of the specification, drawings and abstract contained in the Japanese application of Japanese Patent Application No. 2009-147815 filed on June 22, 2009 is incorporated herein by reference.
　本発明は移動体通信システム等に有用である。 The present invention is useful for mobile communication systems and the like.
　１００，３００，５００，７００　無線送信装置
　２００，４００，６００，８００　無線受信装置
　１０１，１０８，２０１，２０８　アンテナ
　１０２，２０２　携帯電話処理部
　１０３，２０３　無線部
　１０４，２０４　タイミング検出部
　１０５，２０５　ＷＬＡＮ処理部
　１０６，２０６　決定部
　１０７　ＷＬＡＮ送信部
　２０７　ＷＬＡＮ受信部
　３０１，４０１　基地局ＩＤ検出部
　３０２，４０２　照合部
　５０１，６０１　入力部
　７０１，８０１　圏外検出部 100, 300, 500, 700 Wireless transmission device 200, 400, 600, 800 Wireless reception device 101, 108, 201, 208 Antenna 102, 202 Mobile phone processing unit 103, 203 Wireless unit 104, 204 Timing detection unit 105, 205 WLAN Processing units 106 and 206 Determination unit 107 WLAN transmission unit 207 WLAN reception unit 301 and 401 Base station ID detection unit 302 and 402 Verification unit 501 and 601 Input unit 701 and 801 Out-of-service detection unit

Claims (6)

  1. 　第１通信システム、および、前記第１通信システムと異なる第２通信システムを使用可能な無線受信装置であって、
    　前記第１通信システムの基地局装置が送信する制御信号の送信タイミングに同期して、前記第２通信システムで用いるビーコンの受信タイミングを決定する決定手段と、
    　前記受信タイミングに従って、前記ビーコンを受信する受信手段と、
    　を具備する無線受信装置。     A wireless receiver capable of using a first communication system and a second communication system different from the first communication system,
    Determining means for determining a reception timing of a beacon used in the second communication system in synchronization with a transmission timing of a control signal transmitted by the base station device of the first communication system;
    Receiving means for receiving the beacon according to the reception timing;
    A wireless receiver comprising:
  2. 　前記受信手段は、予め設定された基地局ＩＤと同一の基地局ＩＤが前記制御信号から検出された場合、前記決定手段で決定された前記受信タイミングに従って、前記ビーコンを受信する、
    　請求項１記載の無線受信装置。     The receiving means receives the beacon according to the reception timing determined by the determining means when a base station ID identical to a preset base station ID is detected from the control signal.
    The wireless receiver according to claim 1.
  3. 　特定の位置を入力する入力手段、をさらに具備し、
    　前記受信手段は、前記特定の位置に対応する基地局装置の基地局ＩＤと同一の基地局ＩＤが前記制御信号から検出された場合、前記決定手段で決定された前記受信タイミングに従って、前記ビーコンを受信する、
    　請求項１記載の無線受信装置。     An input means for inputting a specific position;
    The receiving means detects the beacon according to the reception timing determined by the determining means when a base station ID identical to the base station ID of the base station apparatus corresponding to the specific position is detected from the control signal. Receive,
    The wireless receiver according to claim 1.
  4. 　前記受信手段は、自装置および前記第２通信システムの通信相手の双方が前記基地局装置のカバーエリア内に位置する場合、前記決定手段で決定された前記受信タイミングに従って、前記ビーコンを受信し、自装置または前記第２通信システムの通信相手のいずれか一方でも前記基地局装置のカバーエリア外に位置する場合、予め設定された受信タイミングに従って、前記ビーコンを受信する、
    　請求項１記載の無線受信装置。     The receiving means receives the beacon according to the reception timing determined by the determining means when both the own apparatus and the communication counterpart of the second communication system are located within the coverage area of the base station apparatus, When either one of its own device or the communication partner of the second communication system is located outside the cover area of the base station device, the beacon is received according to a preset reception timing.
    The wireless receiver according to claim 1.
  5. 　第１通信システム、および、前記第１通信システムと異なる第２通信システムを使用可能な無線送信装置であって、
    　前記第１通信システムの基地局装置が送信する制御信号の送信タイミングに同期して、前記第２通信システムで用いるビーコンの送信タイミングを決定する決定手段と、
    　前記送信タイミングに従って、前記ビーコンを送信する送信手段と、
    　を具備する無線送信装置。     A wireless transmission device capable of using a first communication system and a second communication system different from the first communication system,
    Determining means for determining a transmission timing of a beacon used in the second communication system in synchronization with a transmission timing of a control signal transmitted by the base station device of the first communication system;
    Transmitting means for transmitting the beacon according to the transmission timing;
    A wireless transmission device comprising:
  6. 　第１通信システムの基地局装置が送信する制御信号の送信タイミングに同期して、前記第１通信システムと異なる第２通信システムで用いるビーコンの受信タイミングを決定する、
    　ビーコン受信タイミング決定方法。     In synchronization with the transmission timing of the control signal transmitted by the base station apparatus of the first communication system, the reception timing of the beacon used in the second communication system different from the first communication system is determined.
    Beacon reception timing determination method.
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