Method and wireless terminal for generating and maintaining a relative positioning system
First Claim
1. A method for determining the relative position of wireless terminals in an ad hoc network in which at least some of said wireless terminals can communicate over wireless links in one or several hops with at least some of the other wireless terminals and the location of at least one wireless terminal is determined by measuring the distances between at least two terminals, the method comprising:
- measuring in a plurality of said wireless terminals the distances to one-hop neighbors, sending measured distances to other wireless terminals, and using the distances measured in at least two terminals to compute in at least one said wireless terminal the position of at least one other wireless terminal.
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Accused Products
Abstract
A method for determining the relative position of wireless terminals (1) in an ad hoc network, wherein at least some of said wireless terminals can communicate over wireless links (2) in one or several hops with at least some of the other wireless terminals. The following steps are performed in the wireless terminals: (1) measuring in a plurality of said wireless terminals the distances (dij) to one-hop neighbors, and (2) using the distances measured in at least two wireless terminals to compute the location (x, y) of at least one other wireless terminals. One advantage of the invention is GPS-less positioning in ad hoc networks.
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Citations
33 Claims
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1. A method for determining the relative position of wireless terminals in an ad hoc network in which at least some of said wireless terminals can communicate over wireless links in one or several hops with at least some of the other wireless terminals and the location of at least one wireless terminal is determined by measuring the distances between at least two terminals, the method comprising:
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measuring in a plurality of said wireless terminals the distances to one-hop neighbors, sending measured distances to other wireless terminals, and using the distances measured in at least two terminals to compute in at least one said wireless terminal the position of at least one other wireless terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A wireless terminal comprising:
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electronic circuit means for directly communicating over a wireless interface with similar wireless terminals and for relaying communications on behalf of other wireless terminals, distance measuring means for measuring the distance to other wireless terminals, and computing means for computing the position of at least one other wireless terminal, said location being computed based on said distances and on distance information received from other wireless terminals. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification