Patent ID: 8483720

Claim:
A method for determining the location of an object using a transceiver co-located with said object, said transceiver comprising a first transmitter and a first receiver operable to transmit and receive signals using a first transmission protocol and a second transmitter operable to transmit signals using a second transmission protocol, the method comprising: transmitting a first signal using said first transmission protocol; using said first receiver to receive said first signal; using said first transmitter to transmit a second signal using said first transmission protocol in response to receipt of said first signal, if said transceiver is outside transmission range of a node using said second transmission protocol; using said second transmitter to transmit a second signal using said second transmission protocol in response to receipt of said first signal, if said transceiver is within transmission range of a node using said second transmission protocol; and processing said second signal to determine the location of said object.