| 摘要 |
A wireless device (10) has a transceiver (20) and a device detector (60) to detect the presence nearby of another wireless device without using the transceiver, the wireless device being arranged to use the detection to determine a channel for the transceiver to start communication with the given other wireless device, and to start the communication. Having a separate detector enables the transceiver to avoid having to listen for long periods to detect other devices, to save transceiver power consumption. Having the channel determined according to the detection means that the transceiver need not scan many channels. Also, user set up or input can be minimised by having the communication start according to the detection. The detector is arranged to produce detection signals in both devices with related timings to synchronise the transceivers. |
