Patent ID: 7293088

Claim:
A method of determining location of a radio tag or client station of a wireless network, the method comprising: receiving from a plurality of wireless stations of the wireless network path loss information of the path loss of one or more location frames received at the respective wireless stations, the location frames transmitted by the radio tag or client station and having a pre-defined frame structure; and determining the location of the wireless station or radio tag from the path loss information using a path-loss based location determining method, wherein the radio tag or client station uses for transmitting a location frame, a common infrastructure configured for radiolocation by path loss measurement, the common infrastructure including a pre-defined protocol common for both radio tags and client stations for transmitting information for reception by the plurality of stations of the wireless network for radiolocation, the pre-defined protocol including using the location frame having the pre-defined frame structure, wherein the pre-defined protocol includes a pre-assigned multicast address to be used by transmitting radio tags and client stations to transmit location frames, and wherein a location frame conforming to the pre-defined frame structure includes an identifier that provides for a receiving station to recognize the frame as a frame that includes location information, and wherein the identifier includes the multicast address.