Matches 401 - 450 out of 524 < 1 2 3 4 5 6 7 8 9 10 11 >
Match Document Document Title
5793842 System and method of call routing and connection in a mobile (remote) radio telephone system  
A system and method for providing radio routing and radio frequency channel assignment in a radio telephone system utilizing signal strength and routing messages as a primary criteria for obtaining...
5790938 Method for controlling a subscriber station in a mobile radio system  
A method for controlling a subscriber station operating on a direct mode channel in a mobile radio system. The mobile radio system is one which includes a radio network with at least one base...
5787111 Transportable communication system  
The present invention relates to a transportable communications system that may be used to provide supplemental communications to a geographic region. The transportable communications system may be...
5781860 Method for controlling subscriber stations in a radio-telecommunications system  
In a radiotelecommunications system where some of the subscriber stations are able to communication with one another on a direct mode channel, to direct subscriber stations to one and the same...
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...
5774786 Method of maintaining calls subsequent to a site controller failure  
The present invention provides a method of maintaining calls subsequent to a site controller failure. A site controller broadcasts call information to a plurality of standby repeaters. The standby...
5771438 Short-range magnetic communication system  
A system and method communicate signals between a portable unit and a communications system. The portable device communicates with a base unit using inductive coupling. The base unit is further...
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...
5767788 Computer aided dispatch and locator cellular system  
A cellular phone type network tracks public safety workers and their vehicles for computer aided dispatching and automatic vehicle and personnel locating. A worker carried repeater unit...
5757783 Method and apparatus for routing ATM cells in an AD-ATM LAN  
A system and method for routing ATM cells in a wireless ATM local area network (LAN) that use portable base station (PBS) switching nodes. Routing of cells to and from mobile users within the...
5737686 Circuit control apparatus for satellite communication system  
A satellite communication system has a plurality of transmitting stations, a plurality of receiving stations, and a system control station in a 1 to N system configuration to which the...
5734982 Radio communication system  
A radio communication system includes a radio port, a fixed radio terminal, a memory unit, a notification unit, and a mobile radio terminal. The radio port communicates in a service area by using a...
5729826 Mobile communication system with moving base station  
A mobile communication system employs moving base stations moving in the direction of flow of traffic moving along a roadway. The moving base station communicates with fixed radio ports connected...
5729695 Method and device for acknowledgement of transmitted information  
The present invention provides a method and a device for increasing the coverage in a shop data system for each individual information module (B1-B10), which has a low output power for its message...
5729196 Personal location and message system and unit  
A portable receiving/transmitting unit is adapted to communicate with a master station, the master station being associated with a plurality of base stations, a plurality of pagers and a plurality...
5710764 Method of signal transmission in a mobile communication system  
A method of signal transmission between radio base stations (BSs) in a mobile communication system by using only one transmission system commonly used for both of communication with the exchange...
5705980 Method and apparatus for summoning police or security personnel for assistance in an emergency situation  
Security officers (38) can be summoned to help a person (28) in distress, by providing portable pagers (40) to a group of officers assigned to a protected area (26). A person entering the area...
5699354 Audio routing within trunked radio frequency multisite switch  
A distributed trunked radio frequency (RF) switching network (multisite switch) distributes audio routing control information and digitized audio signals to communications interface modules (nodes)...
5697049 Radio relay method, radio relay system using the method and radio unit  
A radio relay communication system wherein a signal transmitted from active one of a plurality of radio units is received and recorded. When the transmission operation of the particular radio unit...
5689802 Two-way radio with transmit mode and repeat mode  
A two-way radio having a receiver (20) for receiving a radio signal including a voice message, a storage element (45) coupled to the receiver for storing the voice message received, a voice input...
5684859 Method and apparatus for downloading location specific information to selective call receivers  
A selective call system (100) has a plurality of base sites (120-124) for communicating with a plurality of selective call receivers (108) with acknowledge-back capability. A base site transmitter...
5682379 Wireless personal local area network  
A transceiver apparatus for creating a wireless personal local area network between a computer terminal and one or more peripheral devices. A separate transceiver is connected to the computer...
5678783 System and method for remediation of selected atmospheric conditions and system for high altitude telecommunications  
The system includes a platform assembly which includes a plurality of helium airships for support of an emitting electrode to produce a large amount of electrical charges, in the form of electrons,...
5630212 Microwave radio system with software configuration of operating parameters  
Structure for controlling the output power from a microwave transmitter uses a digital value transmitted under control of software to an outdoor unit of a transmitter thereby to allow the power...
5628049 Mobile satellite terminal equipment  
A satellite system antenna/high frequency unit of a mobile terminal of the present invention is constructed with a satellite system antenna for a mobile satellite communication system and a...
5621798 Method and apparatus for cooperative messaging  
A wireless network is disclosed that comprises base transmitter/receiver stations coupled to a trunk communications network and several mobile computing devices that are capable of transmitting and...
5621732 Access method and a relay station and terminals thereof  
In a transmission system having a procedure to exchange control information at least one time between a first terminal and a second terminal to transfer data from the first terminal to the second...
5613197 Multi-channel transponder with channel amplification at a common lower frequency  
Input RF signals to a transponder, such as a communications satellite, are down converted to a lower intermediate frequency (IF) that is common for each different channel. The channel signals are...
5612948 High bandwidth communication network and method  
A cellular communication network (10) and method operates at frequencies above 2 GHz and achieves widespread coverage within a cell (14) by adapting routing channels, symbol rates, and FEC coding...
5598459 Authentication and handover methods and systems for radio personal communications  
During handover of a cellular terminal from a wide area cellular network to a base station, authentication messages are relayed between the base station and the wide area cellular network via the...
5592491 Wireless modem  
A system and method for communicating between local subscriber units and a local base station repeater cell in a two-way communication interactive video network. In one embodiment, a modem is used...
5579536 Method and apparatus for establishing communication links between non-stationary communication units  
A method and apparatus for establishing communication links between communication units that travel in different, determinable directions. The method includes the steps of calculating communication...
5559865 Airborne radiotelephone communications system  
The airborne communication system enables one or more radiotelephones to communicate with a ground based cellular radiotelephone system. In the preferred embodiment, the aircraft is equipped with a...
5553312 Data transfer and communication network  
A data transfer and communication system is disclosed including a central station and a plurality of remote, relay terminals. Each relay terminal includes a data entry device such as a keypad or...
5541979 Cell extender with timing alignment for use in time division multiple-access and similar cellular telephone systems  
A cell extender for use in digital cellular telephone systems comprises a control module, and scanning module, and several traffic modules. The control module bidirectionally repeats the donor cell...
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...
5528667 Time management for cordless telephone by inputs from a user through the keypad to cause data to be transferred to the external source via input terminals and mating terminals on a battery charger  
A cordless telephone which includes a static RAM (50) for storing time management information and a real time clock (52). The time management information which includes telephone numbers and diary...
5519761 Airborne radiotelephone communications system  
The airborne radio communications system of the present invention enables an airborne radio to communicate with the ground based cellular radiotelephone system. The present invention also enables...
5495518 Car telephone apparatus having operational control program replacing function  
The present invention provides an excellent car telephone apparatus which can erase the contents of a memory without dismounting the memory from the car telephone apparatus, i.e., with the memory...
5490284 Satellite/land mobile communication system integration scheme  
Through utilization of a transportable earth station capable of communicating with both of a mobile satellite communication system and a terrestrial based mobile communication system and a portable...
5481539 Datagram communication service over a cellular telephone network  
A highly fault tolerant method of radio communication piggybacked upon time division multiple access (TDMA) digital cellular radio telephone systems transmits message packet through a distributed...
5475689 Cellular telephone with datagram and dispatch operation  
A cellular system supports dispatch and datagram operations. The architecture of a conventional cellular system, such as the GSM system, is modified by adding a local area network (TIL) where nodes...
5432839 Method and apparatus for forwarding selective call messages received in a first selective call service to a second selective call service  
A method, in a repeater (155) having receiving circuitry (310, 315) for selectively receiving and decoding a selective call message transmitted by a first selective call service (105) and further...
5422934 Cordless range extension accessory apparatus for radio telephones  
An accessory apparatus for mobile radio telephones, particularly those used in cellular networks, permits utilization of the full communication range capability of a vehicle-mounted cellular radio...
5412654 Highly dynamic destination-sequenced destination vector routing for mobile computers  
Packets are transmitted between stations of an ad-hoc network of mobile stations by using routing tables which are stored at each station of the network. Routing information is broadcast or...
5410587 Ultrasonic radiotelephone for an automobile  
A car radiotelephone system having one or more wireless handsets communicating voice and control information via an ultrasonic link with a stationary unit connected functionally to a base station....
5408679 Mobile telecommunications system having an expanded operational zone  
A mobile telecommunication system comprises a base station connected to a public communication network and having a non-directional antenna for broadcasting at a first frequency over a first...
5371901 Remote voice control system  
A portable communication device (10) is controlled by voice recognition circuitry (20) remote from the portable communication device. The portable communication device includes apparatus for...
5355511 Position monitoring for communicable and uncommunicable mobile stations  
An information communicating system and method comprising an order station and a plurality of mobile stations. When the order station cannot communicate with a mobile station, the order station...
5353330 Power conserving mobile telephone usable as a portable phone and as an installed phone  
A mobile telephone usable both as a portable and as an installed telephone, capable of saving battery power when used as a portable telephone, and safely starting up voice-dialing when used as an...
Matches 401 - 450 out of 524 < 1 2 3 4 5 6 7 8 9 10 11 >