Wireless communication control apparatus and method
First Claim
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1. A wireless communication apparatus comprising:
- a first identifying unit that identifies a space area from which a radio wave has come;
a second identifying unit that identifies a frequency channel through which the radio wave has been carried;
a judging unit that judges a busy/idle state of the frequency channel identified by the second identifying unit in the space area identified by the first identifying unit;
a storage unit that stores the busy/idle state judged by the judging unit in association with the space area and the frequency channel;
a determining unit that determines one or more frequency channels to be used for transmission depending upon the busy/idle state of each frequency channel in the space area in which the first wireless communication apparatus is located; and
a transmitting unit that transmits a radio wave through the frequency channels determined by the determining unit,wherein, when there are multiple frequency channels the busy/idle states of which are idle in the space area to which the radio wave is transmitted, the determining unit determines whether to transmit frames using all of the frequency channels which are idle or transmit the frames using a part of the frequency channels which are idle, wherein the determining unit determines whether to transmit the frames using all of the frequency channels which are idle or transmit the frames using a part of the frequency channels which are idle, according to the type of the application of the frames transmitted to the first wireless communication apparatus.
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Abstract
By using multiple channels at the same time to realize broadbanding of the frequency channels and suppressing increase in the waiting time before starting transmission of wireless signals, improvement of the practical throughput can be realized. A wireless communication apparatus AP1 is a wireless communication apparatus provided with a space division processing unit 40 for identifying which space area a radio wave has come from; a frequency division processing unit 30 for identifying which channel the radio wave has been carried through; a carrier sense unit 50 for judging the busy/idle state of the identified channel in the identified space area; a storage unit 60 for storing the judged busy/idle state in association with the space area and the channel; a determining unit 70 for, when a radio wave is transmitted to a first wireless communication apparatus, determining a channel to be used at the time of transmission according to the busy/idle state of each channel in the space area in which the first wireless terminal is located.
17 Citations
9 Claims
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1. A wireless communication apparatus comprising:
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a first identifying unit that identifies a space area from which a radio wave has come; a second identifying unit that identifies a frequency channel through which the radio wave has been carried; a judging unit that judges a busy/idle state of the frequency channel identified by the second identifying unit in the space area identified by the first identifying unit; a storage unit that stores the busy/idle state judged by the judging unit in association with the space area and the frequency channel; a determining unit that determines one or more frequency channels to be used for transmission depending upon the busy/idle state of each frequency channel in the space area in which the first wireless communication apparatus is located; and a transmitting unit that transmits a radio wave through the frequency channels determined by the determining unit, wherein, when there are multiple frequency channels the busy/idle states of which are idle in the space area to which the radio wave is transmitted, the determining unit determines whether to transmit frames using all of the frequency channels which are idle or transmit the frames using a part of the frequency channels which are idle, wherein the determining unit determines whether to transmit the frames using all of the frequency channels which are idle or transmit the frames using a part of the frequency channels which are idle, according to the type of the application of the frames transmitted to the first wireless communication apparatus.
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2. A wireless communication apparatus comprising:
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a first identifying unit that identifies a space area from which a radio wave has come; a second identifying unit that identifies a frequency channel through which the radio wave has been carried; a judging unit that judges a busy/idle state of the frequency channel identified by the second identifying unit in the space area identified by the first identifying unit; a storage unit that stores the busy/idle state judged by the judging unit in association with the space area and the frequency channel; a determining unit that determines one or more frequency channels to be used for transmission depending upon the busy/idle state of each frequency channel in the space area in which the first wireless communication apparatus is located; and a transmitting unit that transmits a radio wave through the frequency channels determined by the determining unit, wherein, after determining the frequency channels to be used for transmission, the determining unit determines to transmit frames with using the directional transmission if at least one of the busy/idle states of the space areas in the frequency channel is busy.
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3. A wireless communication apparatus comprising:
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a first identifying unit that identifies a space area from which a radio wave has come; a second identifying unit that identifies a frequency channel through which the radio wave has been carried; a judging unit that judges a busy/idle state of the frequency channel identified by the second identifying unit in the space area identified by the first identifying unit; a storage unit that stores the busy/idle state judged by the judging unit in association with the space area and the frequency channel; a determining unit that determines one or more frequency channels to be used for transmission depending upon the busy/idle state of each frequency channel in the space area in which the first wireless communication apparatus is located; and a transmitting unit that transmits a radio wave through the frequency channels determined by the determining unit, wherein, after determining the frequency channels to be used for transmission, the determining unit determines whether to transmit frames with using the directional transmission or omni-directional transmission if all of the busy/idle states of the space areas in the frequency channels are “
idle”
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4. A wireless communication apparatus comprising:
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a first identifying unit that identifies a space area from which a radio wave has come; a second identifying unit that identifies a frequency channel through which the radio wave has been carried; a judging unit that judges a busy/idle state of the frequency channel identified by the second identifying unit in the space area identified by the first identifying unit; a storage unit that stores the busy/idle state judged by the judging unit in association with the space area and the frequency channel; a determining unit that determines one or more frequency channels to be used for transmission depending upon the busy/idle state of each frequency channel in the space area in which the first wireless communication apparatus is located; and a transmitting unit that transmits a radio wave through the frequency channels determined by the determining unit, wherein, after determining the frequency channels to be used for transmission, the determining unit determines to multiplex at least one of other wireless communication apparatuses located in the space areas the busy/idle states of which are recognized to be idle in the frequency channels. - View Dependent Claims (5, 6)
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7. A wireless communication apparatus comprising:
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a first identifying unit that identifies a space area from which a radio wave has come; a second identifying unit that identifies a frequency channel through which the radio wave has been carried; a judging unit that judges a busy/idle state of the frequency channel identified by the second identifying unit in the space area identified by the first identifying unit; a storage unit that stores the busy/idle state judged by the judging unit in association with the space area and the frequency channel; a determining unit that determines one or more frequency channels to be used for transmission depending upon the busy/idle state of each frequency channel in the space area in which the first wireless communication apparatus is located; and a transmitting unit that transmits a radio wave through the frequency channels determined by the determining unit, wherein some of the space areas are regions where other networks adjacent to a network to which the wireless communication apparatus belongs are located; and the first identifying unit estimates the respective space areas in which the other networks are located by an announcement signal received from the other wireless communication apparatuses which belong to the other network.
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8. A wireless communication apparatus comprising:
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a first identifying unit that identifies a space area from which a radio wave has come; a second identifying unit that identifies a frequency channel through which the radio wave has been carried; a judging unit that judges a busy/idle state of the frequency channel identified by the second identifying unit in the space area identified by the first identifying unit; a storage unit that stores the busy/idle state judged by the judging unit in association with the space area and the frequency channel; a determining unit that determines one or more frequency channels to be used for transmission depending upon the busy/idle state of each frequency channel in the space area in which the first wireless communication apparatus is located; and a transmitting unit that transmits a radio wave through the frequency channels determined by the determining unit, wherein the wireless communication apparatus and the second wireless communication apparatus belong to the same network; information showing a state indicating whether the second wireless communication apparatus is busy or idle is received from the second wireless communication apparatus; and the judging unit judges the busy/idle state of the space area in which the second wireless communication apparatus is located according to the information.
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9. A wireless communication apparatus comprising:
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a first identifying unit that identifies a space area from which a radio wave has come; a second identifying unit that identifies a frequency channel through which the radio wave has been carried; a judging unit that judges a busy/idle state of the frequency channel identified by the second identifying unit in the space area identified by the first identifying unit; a storage unit that stores the busy/idle state judged by the judging unit in association with the space area and the frequency channel; a determining unit that determines one or more frequency channels to be used for transmission depending upon the busy/idle state of each frequency channel in the space area in which the first wireless communication apparatus is located; and a transmitting unit that transmits a radio wave through the frequency channels determined by the determining unit, wherein the transmitting unit transmits a signal to the first wireless communication apparatus using multiple frequency channels; and when receiving a response frame to the signal is received, the judging unit judges the busy/idle state of the frequency channel through which the response frame has been transmitted in the space area in which the first wireless communication apparatus is located, to be “
idle”
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Specification
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Current AssigneeKabushiki Kaisha Toshiba (Toshiba Corporation)
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Original AssigneeKabushiki Kaisha Toshiba (Toshiba Corporation)
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InventorsUtsunomiya, Yoriko, Nakajima, Tetsu, Takagi, Masahiro, Tandai, Tomoya
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Primary Examiner(s)CHO, HONG SOL
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Application NumberUS12/438,852Publication NumberTime in Patent Office1,139 DaysField of SearchNoneUS Class Current370/278CPC Class CodesH04W 16/28 using beam steeringH04W 72/541 using the level of interfer...
