发明名称 |
CONTROL OF COMMUNICATION SIGNAL TRANSMISSION BASED ON TRANSCEIVER PROXIMITY ESTIMATION |
摘要 |
Radio transceivers 5 in a communication system periodically broadcast signal pulses 6 to enable a radio transceiver 5 to determine their proximity. Each radio transceiver 5 has a clock 16 for maintaining a time synchronised by a synchronisation means 17 via the Global Positioning System (GPS). Each radio transceiver 5 transmits a signal pulse 6 at the same point in the synchronised time. A signal detector 19 detects the start of a signal pulse 6 received from the closest radio transceiver 5 and a proximity estimator 20 estimates the proximity of the closest radio transceiver 5 by determining the difference between the point in the synchronised time at which the signal pulses 6 are broadcast and the point in the synchronised time at which the start of a signal pulse 6 received from another radio transceiver 5 is detected. A controller 21 compares the estimated proximity to a threshold and, if the proximity estimate is less than a given threshold, it prevents a transmission means 7 of the radio transceiver 5 from transmitting a communication signal. |
申请公布号 |
WO2007072423(A2) |
申请公布日期 |
2007.06.28 |
申请号 |
WO2006IB54950 |
申请日期 |
2006.12.19 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V.;SAYERS, ANTHONY, D. |
发明人 |
SAYERS, ANTHONY, D. |
分类号 |
H04W8/00;H04W56/00;H04W74/08;H04W84/18;H04W88/02 |
主分类号 |
H04W8/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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