Wireless communication system, terminal, message sending method, and program for allowing terminal to execute the method
First Claim
1. A first terminal comprising:
- a receiving unit configured to receive a predetermined signal from a second terminal;
a ranging unit configured to determine a distance from the second terminal in response to receiving the predetermined signal from the second terminal; and
a sending unit configured to send a predetermined message to the second terminal, when the distance is determined to be within a predetermined range by the ranging unit in response to the predetermined signal being received by the receiving unit from the second terminal.
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Accused Products
Abstract
Upon receiving a beacon, a terminal B sends a RTS control message to a terminal A before sending a registration request message to the terminal A. Upon receiving the RTS control message, the terminal A sends a CTS control message. The terminal B measures the time from when the RTS control message is sent to when the CTS control message is received so as to calculate the distance with the terminal A. If the distance with the terminal A is within a predetermined distance X1, the terminal B sends a registration request message to the terminal A. Similarly, the terminal A measures the distance with the terminal B, and sends a registration request acknowledgement message to the terminal B when the distance with the terminal B is within a predetermined distance X2.
12 Citations
14 Claims
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1. A first terminal comprising:
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a receiving unit configured to receive a predetermined signal from a second terminal; a ranging unit configured to determine a distance from the second terminal in response to receiving the predetermined signal from the second terminal; and a sending unit configured to send a predetermined message to the second terminal, when the distance is determined to be within a predetermined range by the ranging unit in response to the predetermined signal being received by the receiving unit from the second terminal. - View Dependent Claims (2, 3, 4, 6)
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5. A message sending method of a first terminal, the method comprising:
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a step of receiving, by circuitry of the first terminal, a predetermined signal from a second terminal; a step of performing, by the circuitry, ranging to determine a distance from the second terminal in response to the receiving of the predetermined signal from the second terminal; and a step of sending a predetermined message to the second terminal, when the distance is determined to be within a predetermined range in the step of performing in response to the step of receiving the predetermined signal from the second terminal. - View Dependent Claims (7)
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8. A first terminal comprising:
circuitry configured to receive a predetermined signal from a second terminal, determine a distance from the second terminal in response to receiving the predetermined signal from the second terminal, and send a predetermined message to the second terminal, when the distance is determined to be within a predetermined range in response to the predetermined signal being received from the first terminal. - View Dependent Claims (9, 10, 11, 12, 13, 14)
Specification