Randolph L Durrant, Logan Scott, John K Reece: RF signal repeater, mobile unit position determination system using the RF signal repeater, and method of communication therefor. Intel Corporation, Kenneth J Cool, December 31, 2002: US06501955 (126 worldwide citation)

A RF signal repeater system is added to a wireless communications network which increases user data rates at the periphery of the cellular coverage area by boosting the downlink (base station to mobile user) signal and uplink (mobile user to base station) signal. The RF signal repeater system includ ...

Brad W Blumberg, Eric M Blumberg: Mobile location aware search engine and method of providing content for same. Smarter Agent, Cooley Godward Kronish, October 6, 2009: US07599795 (111 worldwide citation)

A method includes identifying a geographic position of a wireless device. Data input by a user while the user is located at the geographic position of the wireless device is received. The data is associated with a landmark at the geographic position. The data is provided to a database based on the g ...

Mundi Fomukong: Method and apparatus for locating mobile units tracking another or within a prescribed geographic boundary. August 27, 2002: US06441752 (110 worldwide citation)

A mobile location reporting communication system consists of a network of communication sources and targets managed by one or more control stations. In the system, a communication source may request for the location of a mobile communication target from the network. The target conveys its location t ...

Hanoch Yokev, Haim Harel, Yehouda Meiman, Shimon Peleg: Multi-path resistant frequency-hopped spread spectrum mobile location system. Nexus 1994, Schwegman Lundberg Woessner & Kluth P A, December 10, 1996: US05583517 (106 worldwide citation)

A multi-path resistant frequency-hopped spread spectrum mobile vehicle or personal location system is described which provides low cost manufacture and low power operation while still enabling the accurate location of the mobile unit over long distances and in moderate to severe multi-path condition ...

Adrian S Matthews: Virtual mobile location area. Lucent Technologies, December 31, 1996: US05590398 (105 worldwide citation)

A Virtual Mobile Location Area (VMLA) personalized to the particular roaming habits of a mobile phone user, employing predetermined grouping of cells arranged in the order of likelihood that the mobile phone users will be in that grouping.

Qi Bi, Wen Yi Kuo: Mobile location estimation in a wireless communication system. Lucent Technologies, Ryan Mason & Lewis, December 19, 2000: US06163696 (103 worldwide citation)

Methods and apparatus for estimating mobile station location in a wireless communication system. At initiation of a call or a page response, a mobile station of the system sends an access request signal to a primary base station. The primary base station responds with an access acknowledgment which ...

Alfred B Levine, Boris Haskell: Real time absentee telephone and radiant wave signaling system. October 30, 1979: US04172969 (98 worldwide citation)

A fully automatic communication system employing an automatic telephone answering device and a mobile radio transmitter and receiver for enabling a party calling another on the telephone to communicate to the mobile location of the other in "real time" that the call is being made and to relay the te ...

Soichi Kuwahara: Mobile communications system and mobile station therefor. Fujitsu, Rosenman & Colin, March 26, 2002: US06363255 (92 worldwide citation)

A mobile communications system having a mechanism to reduce the control message traffic in paging and location updating operations. Each mobile station receives from the nearest base station a notification message containing its base station ID. A location change counting unit detects a change in th ...

Vladimir Alperovich, Dipankar Ray: System and method for location-based group services. Ericsson, Jenkens & Gilchrist P C, May 29, 2001: US06240069 (89 worldwide citation)

A telecommunications system and method is disclosed for defining location-based group services, which can be implemented within a Group Call Services (GCS) node associated with a cellular network. When a group call is initiated, the GCS can send a positioning request to a Mobile Location Center (MLC ...

Jan P Vanderspool II: Method for calculating a location of a remote Unit utilizing observed time difference (OTD) and real time difference (RTD) measurements.. Motorola, Kenneth A Haas, August 22, 2000: US06108558 (84 worldwide citation)

Base stations (101, 103, and 105) transmit, and a remote unit (117) receives a radio frequency (RF) location signal. The remote unit (117) then computes an observed-time-difference (OTD) for each base station at particular time t1. Observed differences in received signal times, and are reported to a ...