Wireless LAN system and base station apparatus
First Claim
1. A wireless LAN system having a plurality of wireless LANs comprising base stations and wireless terminal devices wherein said base stations and said wireless terminal devices in said wireless LANs communicate while sequentially hopping carrier frequencies and said base stations in said wireless LANs communicate with each other by inter-base station communication means,each of said base stations comprising:
- determination means for transmitting and receiving a specific frame including address information of its own base station to and from other base stations through said inter-base station communication means to determine whether its own base station is a master base station or not; and
master base station determination means responsive to an output of said determination means indicating that its own base station is the master base station, for assigning different hopping start frequencies to its own base station and other base stations.
1 Assignment
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Accused Products
Abstract
A wireless LAN system which allows the transmission and reception of various data without lowering the transmission efficiency and the transmission quality even in an overlapping environment of areas of a plurality of wireless LANs and a base station apparatus therefor are provided. The wireless LAN system has a plurality of wireless LANs including base stations and wireless terminal devices, and the base stations and the wireless terminal devices in the wireless LANs communicate while sequentially hopping carrier frequencies to conduct the intercommunication between the base stations in the wireless LANs through inter-base station communication units. Each base station includes a unit for transmitting and receiving a specific frame to and from other base stations through the inter-base station communication unit to determine whether its own base station is a master base station or not and a unit for assigning different hopping start frequencies to its own base station and other base stations when its own base station is determined as the master base station.
79 Citations
28 Claims
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1. A wireless LAN system having a plurality of wireless LANs comprising base stations and wireless terminal devices wherein said base stations and said wireless terminal devices in said wireless LANs communicate while sequentially hopping carrier frequencies and said base stations in said wireless LANs communicate with each other by inter-base station communication means,
each of said base stations comprising: -
determination means for transmitting and receiving a specific frame including address information of its own base station to and from other base stations through said inter-base station communication means to determine whether its own base station is a master base station or not; and master base station determination means responsive to an output of said determination means indicating that its own base station is the master base station, for assigning different hopping start frequencies to its own base station and other base stations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A base station apparatus of a wireless LAN system having a plurality of wireless LANs comprising the base station apparatus and wireless terminal devices wherein said base station apparatus and said wireless terminal devices in said wireless LANs communicate while sequentially hopping carrier frequencies and said base station apparatus in said wireless LANs communicate with each other by inter-base station communication means,
said base station apparatus comprising: -
determination means for transmitting and receiving a specific frame including address information of its own base station to and from other base station apparatus through said inter-base station communication means to determine whether its own base station is a master base station or not; and master base station determination means responsive to an output of said determination means indicating that its own base station is the master base station, for assigning different hopping start frequencies to its own base station and other base stations. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method for determining a master base station in a wireless LAN system having a plurality of wireless LANs comprising base station apparatus and wireless terminal devices wherein said base station apparatus and said wireless terminal devices in said wireless LANs communicate while sequentially hopping carrier frequencies and said base station apparatus in said wireless LANs communicate with each other by inter-base station communication means,
comprising the steps in each of said base stations of: -
transmitting and receiving a specific frame including address information of its own base station to and from other base station through said inter-base station communication means to determine whether its own base station is a master base station or not; and in response to said determination step indicating that its own base station is the master base station, assigning different hopping start frequencies to its own base station and other base stations. - View Dependent Claims (18, 19, 20)
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21. A wireless LAN system having a plurality of wireless LANs comprising base stations apparatus and wireless terminal devices wherein said base station apparatus and said wireless terminal devices in said wireless LANs communicate while sequentially hopping carrier frequencies and said base station apparatus in said wireless LANs communicate with each other through wired LANS,
each of said base station apparatus comprising: -
a wired LAN transmission/reception control unit controlling the transmission and reception of a frame to said wired LANs; a wireless LAN transmission/reception control unit controlling the transmission and reception of a frame to said wireless terminal devices in said wireless LAN to which its own base station belongs; a hopping control unit controlling the hopping of carrier frequencies in said wireless LAN to which its own base station belongs; a relay control unit relaying the frame received by said wired LAN transmission/reception control unit from said wired LANs and the frames received by said wireless LAN transmission/reception control unit from said wireless LANs; and a control unit controlling an operation in its own base station apparatus; said control unit transmitting and receiving a specific frame including address information of its own base station to and from other base station apparatus through said wired LANs to determine whether its own base station apparatus is a master base station apparatus or not, and in response to the determination that its own base station apparatus is the master base station apparatus, assigning different hopping start frequencies to its own base station apparatus and other base station apparatus. - View Dependent Claims (22, 23, 24)
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25. A base station apparatus in a wireless LAN system having a plurality of wireless LANs comprising base station apparatus and wireless terminal devices wherein said base station apparatus and said wireless terminal devices in said wireless LANs communicate while sequentially hopping carrier frequencies and said base station apparatus in said wireless LANs communicate with each other through wired LANs,
said base station apparatus comprising: -
a wired LAN transmission/reception control unit controlling the transmission and reception of a frame to said wired LANs; a wireless LAN transmission/reception control unit controlling the transmission and reception of a frame to said wireless terminal devices in said wireless LAN to which its own base station belongs; a hopping control unit controlling the hopping of carrier frequencies in said wireless LAN to which its own base station belongs; a relay control unit relaying the frame received by said wired LAN transmission/reception control unit from said wired LANs and the frames received by said wireless LAN transmission/reception control unit from said wireless LANs; and a control unit controlling an operation in its own base station apparatus; said control unit transmitting and receiving a specific frame including address information of its own base station to and from other base station apparatus through said wired LANs to determine whether its own base station apparatus is a master base station apparatus or not, and in response to the determination that its own base station apparatus is the master base station apparatus, assigning different hopping start frequencies to its own base station apparatus and other base station apparatus. - View Dependent Claims (26, 27, 28)
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Specification