Matches 51 - 100 out of 207 < 1 2 3 4 5 >
Match Document Document Title
6690916 Radio network for radio communication in an enclosed environment and a repeater for such a radio network  
The invention discloses a radio network for radio communication in an enclosed environment such as a tunnel or an in-house environment including a first head end station ( 1 ) and cascaded...
6687487 Repeater for transmission system for controlling and determining the status of electrical devices from remote locations  
A repeater for use in a two way communication system for retransmitting information between a first device and a second device to help ensure reliable two way communication between the devices,...
6681122 System and method for selectively enabling transmit/receive modes of a radio transceiver  
The present invention relates to a method and apparatus for selectively enabling and disabling transmit and receive functions of a radio, and more particularly to a system and method utilizing an...
6647266 Channel card for extending coverage area of base station  
There is provided a channel card for extending the coverage area of a base station, which controls GPS reference signals provided to base station modems to extend the coverage area by up to four...
6647244 Wireless vehicular repeater system  
A wireless communications system has a plurality of base stations 1 , a plurality of mobile vehicular repeater units 2 , and a plurality of portable units 3 . In a public safety network context,...
6615021 Method and apparatus for transmitting radio frequency signals to and from a pager  
A repeater for transmitting and receiving radio frequency (RF) signals to and from a pager. The repeater includes a forward path for receiving a first RF signal from a base station and a reverse...
6598232 Hybrid amplifier-regenerator for optimizing cable network transmissions  
A hybrid amplifier and regenerator (HAR) device is designed for use in a communications network for carrying downstream traffic in a forward frequency band and for carrying upstream traffic in a...
6535717 Method, system and apparatus for transmitting, receiving, and reproducing a digital broadcast signal  
The present system comprises a transmitting apparatus for digital broadcast which includes an original signal generating section, delaying section, information amount reducing section, and...
6529486 Trunked radio repeater communication system  
A trunked radio repeater communication system capable of use in a networked system includes a plurality of distributive switches and a unique signaling protocol and a switching protocol for...
6507741 RF Repeater with delay to improve hard handoff performance  
An RF repeater having a fixed or adjustable time delay inserted in the reverse path and/or forward path of the RF repeater is used in a first cell for improving hard handoff performance from the...
6477369 Broadband communication network  
A wireless communication system. The wireless communication system includes a first wireless communication network communicating at a first range of frequency. The wireless communication system...
6424818 Communication system using relayed radio channels  
In a communication system, a communication control apparatus is disposed in a mobile object. The communication control apparatus relays information exchanged between a plurality of radio terminals...
6370384 Frequency re-use planning for wireless communications system using wireless translating repeaters  
A novel improved frequency re-use planning which allows the most efficient bandwidth utilization and a larger coverage area in a wireless communications network utilizing translating repeaters is...
6370377 Mobile radio communication system  
A mobile radio communication system which does not need an omnidirectional channel for both a base station and a mobile station to track each other and uses only a narrow beam channel and can...
6351653 Cellular telephone with simultaneous radio and cellular communications  
A cellular telephone ( 110 ) forms part of a wireless communication system ( 100 ) and has simultaneous communication of radio and cellular signals. The wireless communication system ( 100 ) has a...
6317609 System and method for transporting digital speech and digital pictures  
A telecommunications system and method for transmitting digital images produced by a digital camera attached to or integrated with a mobile station (MS) from the MS to a receiving terminal through...
6285857 Multi-hop telecommunications system and method  
Free-space, line-of-sight, electro-magnetic communication (i.e., via light or microwaves) is employed to provide a wide range of communication services to geographically scattered users. A relay...
6243577 Frequency translation to local multi-point distribution system for personal communications services  
A first embodiment of the present invention discloses a system for extending the range of Personal Communication Services ("PCS") band wireless local loop services. A frequency translation unit at...
6236840 Transmission output detecting circuit  
A transmission output detecting circuit for use in a radio transmitter-receiver of a TDD communication system having a TDD switch for connecting a transmission system to an antenna system in a...
6188875 Wireless telephone server system  
A wireless telephone server system used for reproducing a wireless base station signal and introducing the reproduced signal in a new geographical area. The system reproduces or clones a full, high...
6128496 Cellular transceiver station with adjustable time lag  
An arrangement of an area covering, cellular radio communication network having cell regions which can be contiguously replicated without interference. A central transceiver station is coupled to a...
6111663 Apparatus and method for selective modem communications on shared, closed-loop communication systems  
A closed-loop communication system includes a closed-loop communication link with a shared communication channel. A set of communication devices are connected to the closed-loop communication link....
6091301 Flatness compensation of diplex filter roll-off using active amplifier peaking circuit  
An amplifier (100) for amplifying signals includes a diplex filter (120) having a highpass filter (110) and a lowpass filter (115), and an amplifier circuit (205) for amplifying higher frequency...
6052591 Broadcasting messages to mobile stations within a geographic area  
A dialable directory number is assigned to a particular location area or cell area. A telecommunications user wanting to transmit user defined messages, such as a text message, to mobile stations...
5987060 System and method of radio communications with an up-down digital signal link  
The invention provides radio communications with an up-down signal link. In accordance with the purpose of the invention, as embodied and broadly described herein, the invention is directed to a...
5974325 Cellular radio system using common radio backbone  
A communication system employs a method and apparatus for exchanging communicated signals between a communication unit (e.g., 17) and a central site (205). A remote base site (65) or the central...
5887261 Method and apparatus for a radio remote repeater in a digital cellular radio communication system  
A digital cellular radio communication system having a remote repeater is provided. The communication system includes a central communication site which: transmits and receives signals in a first...
5883884 Wireless digital communication system having hierarchical wireless repeaters with autonomous hand-off  
In a wireless communication system, a base unit transmits outgoing TDM signals within a base transmission coverage area at a first frequency. Repeaters in the base coverage area receive the...
5850593 Mobile communication for a mobile station near or outside a service area of a base station  
In a mobile communication network comprising a base station (11) having a service area (13) and a plurality of mobile stations, communication is rendered possible between the base station, with a...
5832365 Communication system comprising an active-antenna repeater  
An indoor wireless communications system using two-way active-antenna repeaters to distribute signals received from external signal sources within an office, and to extend the range of cordless...
5815799 Priority system for a wide area transmission trunked communication system  
A method and apparatus for providing priority access for users in a transmission trunked communication system, including a plurality of distributive radio network terminal (RNT) switches and a...
5781859 RF repeater arrangement with improved frequency reuse for wireless telephones  
An RF repeater arrangement for use in a wireless telephone system has a number of handset interface parts, each provided with a transmit section for transmitting a signal to a wireless telephone...
5768683 Method for automatic re-transmission of voice messages by a mobile communication unit  
A digital voice message, including a continuously embedded portable identification code, is transmitted by a portable communication unit (105) to a mobile communication unit (104) and to broadcast...
5689081 Network karaoke system of broadcast type having supplementary communication channel  
In a network karaoke system, a center station transmits song data, and a plurality of karaoke terminals communicate with the center station to receive therefrom the song data so that each karaoke...
5678176 Direct inward dial telephone number recognition in a land mobile radio system  
A land mobile radio communication system has a plurality of cell sites, each of which typically has a plurality of repeaters. The over-the-air radio communications between the cell site repeaters...
5666646 Radio frequency (RF) converter system with distributed protection switching and method therefor  
The present invention relates to an improved RF converting system. The RF converting system is comprised of a plurality of RF converter modules which are configured for redundant system operation...
5659879 Method of covering shadow areas in a cellular mobile radio system and radio booster for implementing this method  
A mobile radio network comprises a base transceiver station for transmitting and receiving radio signals to and from mobiles on different basic frequencies and a radio booster for receiving,...
5634190 Low earth orbit communication satellite gateway-to-gateway relay system  
This invention teaches the use of overlapping footprints in a LEO satellite communications system to increase the overall connectivity of the system, thus providing a wide service availability. In...
5613196 Method and apparatus for a distributive wide area network for a land mobile transmission trunked communication system  
A land mobile transmission trunked communication system is provided with a unique switching protocol arrangement among repeaters that are networked to one or more external communication networks....
5603080 Radio coverage in closed environments  
A repeater system in a communication system including a base station and a mobile unit provides a communications link between the base station and the mobile unit when the mobile unit is located in...
5596318 Method for operating a two-way messaging system to extend battery life  
A priority based protocol for a two-way paging system improves the life expectancy of the pager's battery by minimizing use of pager's transmitter, without significantly impacting the reliability...
5548802 Method and apparatus for a remote network switch for a land mobile transmission trunked communication system  
A method and apparatus for distributively interconnecting a plurality of land mobile trunked transmission communication systems into a wide area network includes a plurality of distributive radio...
5537680 Cellular receiver range extender  
A cellular receiver range extender has an input terminal connectable to an antenna and an output terminal to which may be connected a microwave radio receiver for cellular communication signals....
5533027 Digital fixed radio access system providing local mobility  
An arrangement for radio communication includes a first radio station or base station, a number of second radio stations, and a number of subscriber stations. The second radio stations each include...
5530914 Method for determining when a radio leaves a radio talk group  
A method for determining when a radio leaves a radio talk group includes the step of notifying a radio(s), such as the initiator of the call (step 308), that one or more members of the talk group...
5530909 Method for Radio transmitting information using aircrafts as open transmission relays  
In order to transmit information between an emitting station and a receiving station separated by a distance exceeding the range of direct communications of said stations, the method according to...
5487101 Off-load cellular system for off-loading cellular service from a main cellular system to increase cellular service capacity  
An off-load cellular system controls cellular service between a main cellular system and the off-load cellular system and provides off-load cellular service to a mobile telephone. The off-load...
5473605 Method for a communication unit to participate in multiple calls  
While participating in a group call on a first wireless communication resource 114, senior members 104-107 of a communication group 108 can initiate a semi-private call. A central controller 110...
5465386 Signaling protocol for a distributive wide area transmission trunked communication system  
A land mobile transmission trunked communication system is provided with an enhanced control signal protocol. The land mobile transmission trunked communication system includes a plurality of...
5442803 Half duplex communication system having quick channel assignments  
A half duplex radio communication system having including a plurality of terminal equipments and a base station for relaying communications between the terminal equipments is characterized by, in...
Matches 51 - 100 out of 207 < 1 2 3 4 5 >