| 摘要 |
<p>A method of attaching a client device A, B, C to one of a plurality of base stations 12, 22 each of which is transmitting on one of a plurality of channels, is disclosed. The method comprises the steps of: (i) setting a receiver of said client device to a first sensitivity and scanning said channels to detect a valid base station transmission; (ii) if a base station transmission is not detected by the scan, incrementally increasing the sensitivity of the receiver and re-scanning said channels for each increase until a valid base station transmission is detected; and (iii) upon detection of a valid base station transmission, attaching the client device to the base station transmitting said valid base station transmission. If no valid base station transmission is detected the client device may enter an ultra low power sleep mode and awaken after a predetermined duration of time. Suitable for sensor nodes, especially in a medical environment wherein many nodes may wish to connect to one of a plurality of fixed base stations within a hospital.</p> |
