Patent
Spread spectrum communication system
TLDR
In this paper, a simple and flexible over-air protocol for use with a mobile telephone system, having hand-held telephones in a microcell or other type of cellular communication system is presented.Abstract:
A simple and flexible over-air protocol for use with a mobile telephone system, having hand-held telephones in a microcell or other type of cellular communication system. A method in which user stations communicate with one or more base stations to place and receive telephone calls, in which the user stations are provided a secure voice or data link and have the ability to handoff calls between base stations while such calls are in progress. Each base station has a set of “air channels” to which it transmits in sequence. The air channels supported by each base station are called that base station's “polling loop”. A user station receives general polling information on an unoccupied air channel, transmits responsive information to the base station, and awaits acknowledgment from the base station. Each base station may therefore simultaneously maintain communication with as many user stations as there are air channels in its polling loop. The ability of a user station to communicate on any unoccupied air channel makes the protocol air-channel agile, while the stability of user station and base station clocks may define air channels, gaps, and minor frames.read more
Citations
More filters
Patent
Distributed cache for a wireless communication system
TL;DR: In this paper, a cache is associated with each radio base station and the cache stores files regularly requested by the remote unit within the coverage area of the corresponding base station, and when a base station receives a message from a remote unit, it parses the message to determine if the message comprises a file request.
Patent
Method and apparatus for scanning frequency channels for handoff candidates while minimizing battery consumption
TL;DR: In this article, the authors describe a technique for scanning other frequency channels for candidate base stations for user-specific and overhead messages, based on the received signal quality (e.g., pilot Ec/Io) for an active base station that a wireless device is monitoring for user specific and overhead message.
Patent
A multimode telecommunication terminal device
TL;DR: In this article, a multimode telecommunication terminal device (30) comprising a plurality of interfaces (17-20) was defined for accessing the plurality of wired and/or wireless telecommunication networks.
Patent
Variable rate channel quality feedback in a wireless communication system
Amab Old Bridge Das,Farooq Khan +1 more
TL;DR: In this paper, a channel quality feedback method for wireless transmission is described in which the rate for reporting channel quality information from a mobile station to a base station is variable as a function of the presence or absence of a transmission from the base station to the mobile station.
Patent
Wireless access system and method
Tsutomu Niiho,Hiroyuki Sasai +1 more
TL;DR: In this paper, a wireless access system and method are provided by which the wireless communications area covered by a single access point is increased while maintaining the maintainability of the access point, minimizing an increase in system cost, and avoiding the hidden terminal problem.
References
More filters
Patent
System and method for generating signal waveforms in a CDMA cellular telephone system
Klein S. Gilhousen,Irwin M. Jacobs,Roberto Padovani,Lindsay A. Weaver,Wheatley Charles E,Andrew J. Viterbi +5 more
TL;DR: In this paper, a system and method for communicating information signals using spread spectrum communication techniques is presented, where PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance.
Patent
Spread spectrum multiple access communication using satellite or terrestrial repeaters
TL;DR: In this article, a multiple access, spread spectrum communication system and method for providing high capacity communications to, from, or between a plurality of system users, using code-division-spread-spectrum communication signals is presented.
Patent
Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system
TL;DR: A power control system for a cellular mobile telephone system in which system users communicate information signals between one another via at least one cell-site using code division multiple access spread spectrum communication signals is described in this paper.
Patent
Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
TL;DR: In this article, a system and method for wireless communication between a plurality of subscriber units and a base station, the base station communicating information signals from an originating source to a destination subscriber unit over a channel at an assigned one of a plurality OF frequencies using repetitive time frames, each said time frame comprising a sequence of time slots.
Patent
Mobile station assisted soft handoff in a CDMA cellular communications system
TL;DR: In this article, a mobile station monitors the signal strength of pilots and reports the measured signal strength to a system controller via the base station through which it is communicating and terminates communication through the corresponding base station while communications through the other base station or base stations continue.