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Locating method and device in wireless multi-hop network

A wireless network and wireless network technology, applied in wireless communication, network topology, data exchange network, etc., can solve the problems of low positioning accuracy and unsatisfactory positioning accuracy, and achieve the effect of improving accuracy

Inactive Publication Date: 2008-07-02
NTT DOCOMO INC
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, because in the process of estimating the distance between nodes, the accuracy of positioning is related to the density of other nodes around the node, especially the density of nodes around the nodes at both ends of its route, so its positioning accuracy degree is not ideal
[0007] In view of the above problems, there is a need for a method that can more accurately locate the target node in a wireless network, so as to eliminate the problem of low positioning accuracy caused by the above problems

Method used

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  • Locating method and device in wireless multi-hop network
  • Locating method and device in wireless multi-hop network
  • Locating method and device in wireless multi-hop network

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Embodiment Construction

[0020] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and unnecessary details and functions for the present invention will be omitted during the description to prevent confusion in the understanding of the present invention.

[0021] figure 1 It is a schematic diagram describing the basic principle of positioning a mobile node in a wireless network according to an embodiment of the present invention, that is, triangulation. exist figure 1 In , RN1, RN2 and RN3 are reference nodes with known coordinates, which are reference nodes in the wireless network in this embodiment. It can be assumed that the position coordinates of the three reference nodes are respectively known (x1, y1), (x2, y2), and (x3, y3). The position coordinates (x, y) of the target positioning node to be measured are unknown. If the distances d1, d2 and d3 from the target positioning node to the reference nodes RN1, RN2 and RN3 can be calc...

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Abstract

The invention discloses a method for positioning mobile nodes in a wireless network, which comprises the following processes: a reference node periodically broadcasts broadcast packets of the reference node to the wireless network; the broadcast packets contain the information on the degree and position as well as the hop number of the reference node; the initial value of the hop number is 0; then a mobile node receiving the broadcast packets adds 1 for the hop number of the received broadcast packets and inserts an identification number (ID) and degree information thereof to the broadcast packets, then transfers to the broadcast packets; the mobile node desiring positioning finds out three reference nodes with the smallest hop number in the received broadcast packets and estimates the distance among the three reference nodes; the mobile node desiring positioning calculates the current position of the mobile node according to the calculated distance among the three reference nodes andthe position information of the reference position.

Description

technical field [0001] The invention relates to a method and device for positioning mobile equipment in a wireless multi-hop network. In particular, it relates to a method and device for realizing absolute position and relative position positioning for a mobile node in a wireless multi-hop network, so that any mobile node can obtain the relative position with other nodes, and improve the absolute position without increasing system overhead. Accuracy in terms of positioning and relative positioning. Background technique [0002] In future wireless local networks, in order to save energy and increase transmission rate, wireless devices usually communicate in a multi-hop manner. In addition, providing services based on location information is also one of the important characteristics of future wireless networks. However, equipping each mobile device with a GPS positioning system is very expensive. In addition, most applications do not need to use the globally unique absolute...

Claims

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Application Information

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IPC IPC(8): H04L29/12H04L12/56H04W4/06H04W84/18
Inventor 黄卿白勇陈岚
Owner NTT DOCOMO INC
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