| 摘要 |
A wireless communication device (e.g., 102 ) employs a method and apparatus for determining distances between wireless communications devices in a wireless communication network ( 100 ). The wireless device receives an incoming message signal ( 117 ) from at least one other wireless device (e.g., 101, 103 - 104 ) in the network. The message signal(s) includes a time of arrival of a ranging signal ( 121 ) previously transmitted by the wireless device. Responsive to receiving the message signal(s), the wireless device receives one or more incoming ranging signal(s) ( 120 ) from the other wireless device(s). Each ranging signal is received in a frequency range that is substantially less than the frequency range in which the messaging signal(s) was received. Having received the message signal(s) and the ranging signal(s), the wireless device then determines the distance between itself and the other wireless device(s) based at least on receipt of the ranging signal(s) and, more preferably, further based on the contents of the message signal(s).
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