Patent
Method and an apparatus for positioning system assisted cellular radiotelephone handoff and dropoff
TLDR
In this paper, a method and an apparatus is provided for acquiring satellite signals to establish the exact spatial position of a cellular radiotelephone, in order to perform a timely dropoff or smooth handoff to another base station or frequency.Abstract:Â
A method and an apparatus is provided for acquiring satellite signals to establish the exact spatial position of a cellular radiotelephone, in order to perform a timely dropoff or smooth handoff to another base station or frequency. The cellular radiotelephone is equipped with its own positioning system which uses satellite data to determine its spatial position. The communication system is preferably a Code Division Multiple Access (CDMA) system, and the positioning system is preferably a Global Positioning System (GPS). The method of the present invention may be used to determine the base station closest to the cellular radiotelephone. In the alternative, it may be used to compute a distance between the cellular radiotelephone and a location where the quality level of the cellular radiotelephone communication signal is predicted to be less than the predetermined value, and to determine from the computed distance whether the cellular radiotelephone should be handed off.read more
Citations
More filters
Patent
Location reporting satellite paging system with optional blocking of location reporting
TL;DR: A location reporting paging communication system comprising space satellites, ground stations and a remote receiving unit adapted to resolve a global position from signals transmitted from a communication transmitter is described in this paper.
Patent
Location determination using RF fingerprinting
Luis Perez-Breva,Chee-Yee Chong,Robert Morris Dressler,Padmanabha R. Rao,Paolo Siccardo,David Stevenson Spain +5 more
TL;DR: In this article, the location of a mobile unit (MU) in a wireless communication system and presenting it to a remote party is determined by comparing a snapshot of a predefined portion of the radio-frequency (RF) spectrum taken by the MU to a reference database containing multiple snapshots taken at various locations.
Patent
Method and system for providing tracking services to locate an asset
TL;DR: In this paper, the location data is received from a cellular transmitter associated with a selected asset, which location data includes data representative of a cellular receiver with which direct communication with the cellular transmitter is made.
Patent
Providing dynamic changes to packet flows
Kaitki Agarwal,Rajat Ghai +1 more
TL;DR: In this article, the authors describe a system and methods for providing dynamic changes to a packet flow in a communication network, which can include upgrading and downgrading quality of service (QoS), adapting the stream to a receiving device, modifying stream to counter-act changes in an air interface, and modifying the stream in order to accommodate an inter-technology handover.
Patent
Mobile communication optimization near wireless dead zone regions
TL;DR: In this article, a mobile unit approaches a communication dead zone, and a call is automatically disconnected in an orderly fashion, and the call can be automatically reconnected when the mobile unit exits the dead zone.
References
More filters
Patent
Cellular telephone system that uses position of a mobile unit to make call management decisions
Everett Dennison,Timothy J. Duffy,Gregory T Pauley,Scott L. Jones,Albert H. Pharis,Warren P. Williamson +5 more
TL;DR: In this article, a cellular telephone system includes a plurality of cell sites and a mobile telephone switching office, and call management, including selection of a cell site most appropriate for a call associated with a mobile unit, are made based on the geographic location of the mobile unit as opposed to the strength of signal associated with the call.
Patent
GPS receiver and method for processing GPS signals
TL;DR: A GPS receiver in one embodiment includes an antenna which receives GPS signals at an RF frequency from in view satellites; a downconverter coupled to the antenna for reducing the RF frequency of the received GPS signals to an intermediate frequency (IF); a digitizer coupled to GPS signals and sampling the signals at a predetermined rate to produce sampled IF GPS signals as discussed by the authors.
Patent
Cellular position locating system
TL;DR: In this paper, the authors proposed a portable locating unit that can be used as a cellular telephone and portable global positioning system that provides latitude and longitude information remotely to a base unit display.
Patent
GPS receiver utilizing a communication link
TL;DR: In this paper, a precision carrier frequency signal for calibrating a local oscillator of a GPS receiver which is used to acquire GPS signals was used to determine approximate Doppler data for satellites in view of the remote GPS receiver.
Patent
Client-server-based remote locator device
TL;DR: In this article, the location information of a remote sensor is transmitted from the server to the client and displayed at the client so that the user can identify the location of the remote sensor.