Radio communication method and radio communication device
First Claim
1. A wireless communication method whereby a plurality of master wireless communication apparatuses, which control at least one slave wireless communication apparatus in a communication area using a directional radio wave, perform communication using a superframe, the wireless communication method comprising:
- arranging the master wireless communication apparatuses such that directivities of respective directional radio waves to be transmitted face each other; and
controlling communication by dividing the superframe into subsuperframes in a time domain and assigning the respective subsuperframes to each of the master wireless communication apparatuses and each of the master wireless communication apparatuses transmitting a beacon in the assigned subsuperframe, wherein;
the directional radio wave is a radio wave in a millimeter wave band having a strong directivity;
the beacon includes (i) a header including a transmission source address, (ii) information including a flag that indicates no echo, and (iii) peripheral equipment control information;
the master wireless communication apparatus transmits the beacon; and
another master wireless communication apparatus different from the master wireless communication apparatus changes, in the received beacon, the transmission source address, and the flag to a flag that indicates echo, without changing the peripheral equipment control information, and retransmits the changed beacon, as an echo beacon, to the slave wireless communication apparatus in a communication area of the other master wireless communication apparatus and out of a communication area of the master wireless communication apparatus.
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Accused Products
Abstract
A radio communication method is capable of easily realizing multi-access in an ad-hoc network using a directive radio wave. In the ad-hoc network using the directive radio wave of the method, two PNC functioning as master devices are arranged opposed to each other so that their directivities face to each other. A super frame is time-divided into two sub super frames so that one of the sub super frames is controlled by one of the PNC and the other sub super frame is controlled by the other PNC.
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Citations
18 Claims
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1. A wireless communication method whereby a plurality of master wireless communication apparatuses, which control at least one slave wireless communication apparatus in a communication area using a directional radio wave, perform communication using a superframe, the wireless communication method comprising:
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arranging the master wireless communication apparatuses such that directivities of respective directional radio waves to be transmitted face each other; and controlling communication by dividing the superframe into subsuperframes in a time domain and assigning the respective subsuperframes to each of the master wireless communication apparatuses and each of the master wireless communication apparatuses transmitting a beacon in the assigned subsuperframe, wherein; the directional radio wave is a radio wave in a millimeter wave band having a strong directivity; the beacon includes (i) a header including a transmission source address, (ii) information including a flag that indicates no echo, and (iii) peripheral equipment control information; the master wireless communication apparatus transmits the beacon; and another master wireless communication apparatus different from the master wireless communication apparatus changes, in the received beacon, the transmission source address, and the flag to a flag that indicates echo, without changing the peripheral equipment control information, and retransmits the changed beacon, as an echo beacon, to the slave wireless communication apparatus in a communication area of the other master wireless communication apparatus and out of a communication area of the master wireless communication apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A wireless communication method whereby a plurality of master wireless communication apparatuses, which control at least one slave wireless communication apparatus in a communication area using a directional radio wave, perform communication using a superframe, the wireless communication method comprising:
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arranging the master wireless communication apparatuses such that directivities of respective directional radio waves to be transmitted face each other; and controlling communication by dividing the superframe into subsuperframes in a time domain and assigning the respective subsuperframes to each of the master wireless communication apparatuses and each of the master wireless communication apparatuses transmitting a beacon in the assigned subsuperframe, wherein; each of the master wireless communication apparatuses configures a sub-piconet with the slave wireless communication apparatus that is in the communication area of the master wireless communication apparatus, that orients directivity toward the master wireless communication apparatus and that can communicate with the master wireless communication apparatus; each of the subsuperframes is assigned by time division to the master wireless communication apparatus and the slave wireless communication apparatus that configure the sub-piconet; and each of the subsuperframes includes a predetermined access period for transmitting a request from the slave wireless communication apparatus configuring the sub-piconet, to a corresponding master wireless communication apparatus, wherein the access period comprises; an individual access period for individually transmitting a request from the slave wireless communication apparatus that participates in a network; and an access period for a new participant for transmitting a participation request from a slave wireless communication apparatus that does not participate in the network, and when starting communication with another slave wireless communication apparatus, the slave wireless communication apparatus requests an assignment of a communication period using the individual access period. - View Dependent Claims (14)
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15. A wireless communication method whereby a plurality of master wireless communication apparatuses, which control at least one slave wireless communication apparatus in a communication area using a directional radio wave, perform communication using a superframe, the wireless communication method comprising:
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arranging the master wireless communication apparatuses such that directivities of respective directional radio waves to be transmitted face each other; and controlling communication by dividing the superframe into subsuperframes in a time domain and assigning the respective subsuperframes to each of the master wireless communication apparatuses and each of the master wireless communication apparatuses transmitting a beacon in the assigned subsuperframe, wherein; the master wireless communication apparatus transmits the beacon including synchronization control information and peripheral equipment control information; and when one of the master wireless communication apparatuses transmits the beacon, another master wireless communication apparatus retransmits the received beacon as an echo beacon to the master wireless communication apparatus that transmitted the beacon, after changing a transmission source address in the received beacon and adding information showing that the beacon is an echo beacon, wherein; when second and third master wireless communication apparatuses of the master wireless communication apparatuses are arranged facing a first master wireless communication apparatus and when the first master wireless communication apparatus transmits the beacon, the second and the third master wireless communication apparatuses transmit the echo beacon to the first master wireless communication apparatus; when the second master wireless apparatus transmits the beacon, the first master wireless communication apparatus transmits the echo beacon; and when the third master wireless communication apparatus transmits the beacon, the first master wireless communication apparatus transmits the echo beacon, wherein a flame configuration of the beacon comprises; terminal information about a terminal configuring a sub-piconet with the second master wireless communication apparatus; and terminal information about a terminal configuring a sub-piconet with the third master wireless communication apparatus.
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16. A master wireless communication apparatus that performs wireless communication using a directional radio wave, the master wireless communication apparatus comprising:
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a medium access control (MAC) processor that, using one subsuperframe acquired by dividing a superframe used in a network communication, into subsuperframes in a time domain, generates a first main beacon that is a reference signal for synchronization and for transmission to another master wireless communication apparatus arranged such that directivities of the master wireless communication apparatus and the other master wireless communication apparatus face each other, wherein the first main beacon includes (i) a header including a transmission source address, (ii) information including a flag that indicates no echo, and (iii) peripheral equipment control information; a transmitter that transmits the generated first main beacon; and a receiver that receives, from the other master wireless communication apparatus, a second main beacon that is the reference signal for synchronization and for transmission using another subsuperframe acquired by dividing the superframe used in the network communication, into the subsuperframes in the time domain, wherein; the MAC processor further generates an echo beacon including information showing that the beacon is an echo of the second main beacon; the MAC processor changes, in the second main beacon, the transmission source address, and the flag to a flag that indicates echo, without changing the peripheral equipment control information, to generate the echo beacon; and the transmitter further transmits the generated echo beacon, to a slave wireless communication apparatus in a communication area of the master wireless communication apparatus and out of a communication area of the other master wireless communication apparatus, wherein the directional radio wave is a radio wave in a millimeter wave band having a strong directivity. - View Dependent Claims (17, 18)
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Specification