Patent ID: 9247519
Filing Date: 2016-01-26
CPC Classification: H04W

Claim Text:
1. A method for determining a position of a user equipment, the method comprising: receiving, by a location server, time difference information for the user equipment from a base station, the time difference information including a difference between a received timing of an uplink frame from the user equipment at the base station and a transmit timing of a downlink frame to the user equipment at the base station; and identifying, by the location server, a serving remote unit among a plurality of remote units, the serving remote unit communicating with the user equipment by using the time difference information and a unique delay that corresponds to the serving remote unit that is different than unique delays of the others of the plurality of remote units, wherein a non-negative integer is assigned to each of the plurality of remote units consecutively, and the unique delay is set for each of the remote units by multiplying a predetermined delay separation time by the non-negative integer assigned to the remote unit, wherein the identifying the serving remote unit includes, if the time difference information is larger than a first unique delay and equal to or smaller than a second unique delay, determining, by the location server, a remote unit with the first unique delay among the plurality of remote units as the serving remote unit, wherein the first unique delay is determined by multiplying the delay separation time by a first non-negative integer and the second unique delay is determined by multiplying the delay separation time by a second non-negative integer.