Secure wireless user localization scheme using transmission range variation
First Claim
Patent Images
1. A method for determining the location of a wireless device in a wireless network, comprising the steps of:
- transmitting to said wireless device from a plurality of wireless network access points a plurality of encoded signals at a plurality of different transmission power levels;
receiving from said wireless device a set of encoded signals detected by said wireless device from among said plurality of transmitted encoded signals; and
determining the location of said wireless device as a function of said set of encoded signals received from said wireless device.
7 Assignments
0 Petitions
Accused Products
Abstract
A secure localization method for wireless networks utilizes access point variable transmission power capability to transmit encoded localization signals at different power levels to a wireless device in the network. Based on the particular combination of encoded signals collected by the wireless device and reported back to a network controller, the location of the wireless device may be determined in conjunction with information contained in a location database.
-
Citations
19 Claims
-
1. A method for determining the location of a wireless device in a wireless network, comprising the steps of:
-
transmitting to said wireless device from a plurality of wireless network access points a plurality of encoded signals at a plurality of different transmission power levels; receiving from said wireless device a set of encoded signals detected by said wireless device from among said plurality of transmitted encoded signals; and determining the location of said wireless device as a function of said set of encoded signals received from said wireless device. - View Dependent Claims (2, 3, 4, 5, 6, 15, 16, 17, 18)
-
-
7. A system for determining the location of a wireless device within a wireless network, comprising:
-
a plurality of wireless network access points deployed at predetermined locations in said wireless network; an access point controller having a database containing location and transmission power range capability of each of said access points; and a router for enabling said access point controller to communicate with said access points;
whereinsaid access point controller issues commands to each of said access points to transmit a plurality of encoded signals at various transmission power levels within said transmission power range capability, and issues a command to said wireless device to collect detected encoded signals over a predetermined period of time and to transmit to said access point controller the collected encoded signals, whereby said access point controller determines a location of said wireless device based on the collected encoded signals received from the wireless device and information contained in said database. - View Dependent Claims (8, 9, 10, 11, 19)
-
-
12. A method of localization of a wireless device in a wireless network, comprising the steps of:
-
initializing a localization query from an access point controller to said wireless device; receiving a localization request response from said wireless device; instructing a plurality of wireless network access points to transmit encoded transmission power level signals; instructing said wireless device to collect detected encoded transmission power level signals over a predetermined period of time; receiving from said wireless device a collection of detected encoded transmission power level signals after expiration of said predetermined period of time; and estimating the location of said wireless device in said wireless network based on the received collection of encoded transmission power level signals. - View Dependent Claims (13)
-
-
14. A method of localization of a wireless device in a wireless network, comprising the steps of:
-
receiving a localization request from said wireless device; instructing a plurality of wireless network access points to transmit encoded transmission power level signals; instructing said wireless device to collect detected encoded transmission power level signals over a predetermined period of time; receiving from said wireless device a collection of detected encoded transmission power level signals after expiration of said predetermined period of time; estimating the location of said wireless device in said wireless network based on the received collection of encoded transmission power level signals; and informing said wireless device of its estimated location within said wireless network.
-
Specification