Wireless communication system and wireless terminal apparatus for sensor network
First Claim
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1. A wireless terminal apparatus comprising:
- a first wireless transceiver for communicating with a base station;
a second wireless transceiver for communicating with the other wireless terminals;
a congestion control unit for detecting whether the base station is in the state of wireless communication with one of the other wireless terminals; and
a communication control unit for performing wireless communication with said base station by said first wireless transceiver after confirming by said congestion control unit that the wireless communication is in a collision-free state, and for transmitting information to at least one of the other wireless terminals by said second wireless transceiver when the wireless communication with said base station was completed.
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Abstract
A wireless terminal comprising a radio transceiver for communicating with a base station, an infrared transceiver for communicating with another wireless terminal, a congestion control unit for detecting whether radio communication with the base station is in a collision-free state, and a communication control unit for performing radio communication with the base station by the radio transceiver after detecting unoccupied state in the radio channel by the congestion control unit and transmitting identification information to another wireless terminal by the infrared transceiver when the radio communication with the base station is completed.
72 Citations
15 Claims
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1. A wireless terminal apparatus comprising:
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a first wireless transceiver for communicating with a base station; a second wireless transceiver for communicating with the other wireless terminals; a congestion control unit for detecting whether the base station is in the state of wireless communication with one of the other wireless terminals; and a communication control unit for performing wireless communication with said base station by said first wireless transceiver after confirming by said congestion control unit that the wireless communication is in a collision-free state, and for transmitting information to at least one of the other wireless terminals by said second wireless transceiver when the wireless communication with said base station was completed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless communication system comprising:
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a plurality of wireless terminals; and a plurality of base stations connected to a management apparatus via a network, wherein each of said wireless terminals includes; a first wireless transceiver for communicating with one of said base stations; a second wireless transceiver for communicating with the other wireless terminals; a congestion control unit for detecting whether wireless communication with said wireless base station is in a collision-free state; and a communication control unit for performing wireless communication with said base station by said first wireless transceiver after confirming by said congestion control unit that the wireless communication is in a collision-free state, and transmitting information to at least one of said the other wireless terminals by said second wireless transceiver when the wireless communication with said base station by said first wireless transceiver was completed, and wherein each of said base stations forwards content of a communication frame received from each of said wireless terminals to said management apparatus. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification