07058414 is referenced by 96 patents and cites 15 patents.

A method, device and computer readable medium for enabling and blocking communications with a remote device based on a distance of the remote device. The method on which the device and computer readable medium are based includes transmitting a message from a local device to a remote device via an ultra wide band (UWB) wireless medium and receiving a response from the remote device via the UWB wireless medium. The transmitting and receiving steps are preferably performed in accordance with a Media Access Control (MAC) protocol. A distance between the local device and the remote device is then determined based on a time between the transmitting of the message and the receiving of the response and a function, such as communicating with the remote device, is performed in the local device based on the distance determined. The communication between the local device and the remote device may be enabled or disabled depending on the distance that the remote device is from the local device. In addition, the distance information for a remote device may be continually updated, or updated only if communication to the remote device are blocked. A positional map may be generated based on distance data determined for a plurality of reference points and the user may select the remote device from the positional map to enable communications to the positional map.

Title
Method and system for enabling device functions based on distance information
Application Number
9/685202
Publication Number
7058414 (B1)
Application Date
October 10, 2000
Publication Date
June 6, 2006
Inventor
John W McCorkle
Laurel
MD, US
Martin Rofheart
Washington
DC, US
Agent
Posz Law Group
Assignee
Freescale Semiconductor
TX, US
IPC
H04Q 7/20
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