3,876,980 A 4/1975 Haemmig et a1. 3,921,076 A 11/1975 Currie 4,053,890 A 10/1977
Woodson, III et a1. 4,083,003 A 4/1978 Haemmig 4,169,245 A 9/1979 Crom et a1. RE31 …

Related US Application Data (63) Continuation of application No. 1 1/150,414, filed on Jun.
10, 2005, now Pat. No. 7,783.299, which is a continuation-in-part of application No …

(57) ABSTRACT A method in a wireleSS communications device including obtaining timing
advance, for example, by determining (430) timing advance based on a distance of the …

BACKGROUND Roaming is the ability to make and receive calls outside of a user's home
network. International roaming, more specifically, is the ability make and receive calls from a …

(57) ABSTRACT A system and method of determining the location of a mobile station by
determining the time of transmission of a signal by a mobile station and determining range …

(57) ABSTRACT A mobile communication System including a plurality of base Stations
arranged in a communication area, each emit ting a radio wave inherent thereto and a …

(57) ABSTRACT A method for detecting the availability of an alternate wireleSS
communication System. A wireleSS terminal regis ters with a first wireleSS communication …

Methods and systems are employed by a wireless location system (WLS) for locating a
wireless device operating in a geographic area served by a wireless communications …

2. Background Roaming refers to the ability to make and receive calls outside of a user's
home network. More specifically, interna tional roaming is the ability make and receive calls …

Methods and systems are employed by a wireless location system (WLS) for locating a
wireless device operating in a geographic area served by a wireless communications …