LOCATION SENSING SYSTEM AND METHOD FOR MOBILE COMMUNICATION SYSTEM
First Claim
1. A location sensing method for a mobile communication system, comprising the steps of:
- (a) discovering, by a source mobile node, anchor nodes within a predefined vicinity;
(b) discovering neighbor mobile nodes, when a number of discovered anchor nodes is fewer than a predetermined number of reference nodes required for location sensing;
(c) selecting at least one neighbor mobile node as a reference mobile node in conjunction with the discovered anchor nodes; and
(d) computing a location of the source mobile node in cooperation with the predetermined number of reference nodes including the discovered anchor nodes and the reference mobile node.
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Abstract
A location sensing system and method for a mobile communication system is provided for maintaining location sensing service with the support of mobile nodes when there is an insufficient number of anchor nodes for reference points. A location sensing method for a mobile communication system includes discovering, at a source mobile node, anchor nodes in a vicinity; discovering, when a number of discovered anchor nodes is less than a predetermined number of reference nodes required for location sensing, neighboring mobile nodes; selecting at least one of neighboring mobile nodes as a reference mobile node; and computing a location of the source mobile node in cooperation with the predetermined number of reference nodes including the discovered anchor nodes and the reference mobile node.
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Citations
23 Claims
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1. A location sensing method for a mobile communication system, comprising the steps of:
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(a) discovering, by a source mobile node, anchor nodes within a predefined vicinity; (b) discovering neighbor mobile nodes, when a number of discovered anchor nodes is fewer than a predetermined number of reference nodes required for location sensing; (c) selecting at least one neighbor mobile node as a reference mobile node in conjunction with the discovered anchor nodes; and (d) computing a location of the source mobile node in cooperation with the predetermined number of reference nodes including the discovered anchor nodes and the reference mobile node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A location sensing system for a mobile communication system, comprising:
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means for broadcasting a device discovery request message, when a source mobile node detects a lack of predetermined number of anchor nodes; means for receiving device discovery response messages transmitted by at least one neighbor mobile node positioned in a transmission range of the source mobile node; means for selecting one of the at least one neighbor mobile node as a reference mobile node on the basis of measurement information contained in the device discovery response messages; and means for computing a location of the source mobile node with support of the reference mobile node. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A location sensing method for a mobile communication system, comprising:
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(a) broadcasting by a source mobile node, a device discovery request message, when a source mobile node detects less than a predetermined number of anchor nodes; (b) receiving by the source mobile node, a device discovery response message containing location information and measurement information to the source mobile node by neighbor mobile nodes which received the device discovery request message broadcast in (a); (c) analyzing, at the source mobile node, the location and measurement information contained in the received device discovery response messages; and (d) selecting at least one of the neighbor mobile nodes as a reference mobile node on the basis of analysis result. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification