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RE39375 |
System for transmitting packet data in digital cellular time division multiple access (TDMA) air interface
The invention relates to a system for transmitting packet data in the air interface of a digital cellular system based on TDMA, Time Division Multiple Access. The mobile terminated logical channels...
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6928268 |
Method for allocating a transmission capacity to connections in a radio communication system
According to the invention, a connection between a base transceiver station and a subscriber station is allocated a transmission rate for signal transmission from the base transceiver station to...
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6889356 |
Cyclic trellis coded modulation
A universal method of trellis encoding signals mapped according to any signal constellation format involves constructing an encoder output table and a state transition table. The encoder output...
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6788952 |
Cell selection and reselection in a multiple modulation cellular radio system
A cellular system comprises base stations and terminals. A certain first base station ( 105 ) supports only a certain first modulation method ( 301 ) and a certain second base station ( 104 )...
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6578173 |
Cyclic trellis-coded modulation
A universal method of trellis encoding signals mapped according to any signal constellation format involves constructing an encoder output table and a state transition table. The encoder output...
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6577612 |
Transmission system for transmitting digital signals on a radio subscriber line network
In a radio subscriber line network, the overall transmission power of the base station for the digital signal transmission from the base station to the radio subscribers is divided onto a number of...
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6470006 |
Timing control of transmission time slot
A method of controlling the timing of a transmission time slot within a time frame comprises transmitting information over a channel in an allocated time slot at an allocated channel frequency,...
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6101177 |
Cell extension in a cellular telephone system
In a cellular telephone system of the type having TDMA channels, the beginnings of the time slots of an uplink transmission as seen in the base station are offset from the beginnings of the time...
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6084863 |
Method and system for controlling a radio communication repeater
A radio communication system and the method thereof which can eliminate influence of atmospheric interference or an interference signal having a strong signal level and which can allow repeater...
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5991627 |
Control of handover and transmission power control of mobile station in a mobile telecommunications system
The invention relates to controlling transmission power and carrying out a handover during a data transmission over the radio path between a mobile station and a base station (BTS) in a mobile...
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5931965 |
Cyclic trellis coded modulation
A universal method of trellis encoding signals mapped according to any signal constellation format involves constructing an encoder output table and a state transition table. The encoder output...
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5898925 |
Method and arrangement for effecting transmission power control and/or handover of a mobile station assigned two or more time slots per frame in a TDMA telecommunications system
A method and an arrangement for controlling transmitting power of a mobile station and carrying out a handover in a mobile telecommunications system in which data is transmitted over the radio path...
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5838728 |
High rate reed-solomon concatenated trellis coded 16 star QAM system for transmission of data over cellular mobile radio
A cellular communication system provides for trellis encoding/decoding of a 16 Star QAM signal. The system includes a transmitter circuit and a receiver circuit. The transmitter circuit has a...
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5802465 |
Data transmission in a radio telephone network
For bidirectional transmission of packet data, a packet data service unit (Agent) is disposed in a digital cellular system connected to be in association with a Mobile Switching Center, and...
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5784417 |
Cyclic trelles coded modulation
A universal method of trellis encoding signals mapped according to any signal constellation format involves constructing an encoder output table and a state transition table. The encoder output...
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5774461 |
Medium access control and air interface subsystem for an indoor wireless ATM network
A system for delivering packetized data in a network dynamically assigns a unique address to a mobile unit, allocates bandwidth within a wireless link by a token scheme and provides forward error...
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5729541 |
System for transmitting packet data in radio telephone TDMA systems
The invention relates to a method for transmitting packet data in a cellular system. The number of time slots in a TDMA frame dedicated for packet transmission varies according to transmission...
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5719859 |
Time division multiple access radio communication system
A radio communication system for performing communications between a base station and mobile stations by Time Division Multiple Access (TDMA) with a certain number of time slots in a frame. The...
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5675590 |
Cyclic trellis coded modulation
A universal method of trellis encoding signals mapped according to any signal constellation format involves constructing an encoder output table and a state transition table. The encoder output...
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5659578 |
High rate Reed-Solomon concatenated trellis coded 16 star QAM system for transmission of data over cellular mobile radio
A cellular communication system provides for trellis encoding/decoding of a 16 Star QAM signal. The system includes a transmitter circuit and a receiver circuit. The transmitter circuit has a...
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5640395 |
System for transmitting packet data in digital cellular time division multiple access (TDMA) air interface
The invention relates to a system for transmitting packet data in the air interface of a digital cellular system based on TDMA, Time Division Multiple Access. The mobile terminated logical channels...
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5613198 |
Multiaccess scheme for mobile integrated local area networks
A method of dynamically allocating bandwidth of channels to cells in a communications cellular network according to user demand. Groups of cells are formed so as to minimize interference within...
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5553074 |
Transmission format in packet based communications
In packet based communications, e.g., in cellular or mobile communications, information is formatted as transmission frames. The transmission frames have equal length or duration, and they have a...
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5517503 |
Apparatus for and method of temporary termination of a communication resource
In a first coverage area of a geographically-based frequency-reuse communication system, at least two time division multiplexed communication resources are provided (109 and 111). It is determined...
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5465253 |
Method and apparatus for demand-assigned reduced-rate out-of-band signaling channel
In a radio frequency communications system transmitting and receiving packetized voice information over a limited number of channels, certain time slots are preempted for signaling information....
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5448762 |
Method and apparatus for mobile radio communications having switched dual frequency synthesizers
In a mobile radio communications station, a communications reception frequency is generated and a time sequence of a plurality of reception monitoring frequencies is separately generated. A...
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5444708 |
Time-division multiplex radio transmission apparatus
A time-division multiplex radio transmission apparatus includes a first frequency divider, a logic processing unit, a digital filter, a modulation unit, a high-frequency amplification unit, and a...
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5442635 |
Method for dividing a frame structure in a mobile station
A method for dividing a frame structure for a mobile telephone system which operates in half-duplex, i.e. in which the transmission and reception of signals in a mobile takes place within mutually...
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5369637 |
Signal transmission system
A signal transmission system, for example a TDMA system, in which a carrier is divided into a plurality of traffic signal time slots, with optionally, some regularly interspersed control signal...
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5353303 |
Technique for increasing the data rate in a spread spectrum data link
A method for increasing the bit rate of a data link is to select two additional 31-bit chip code patterns that are orthogonal to the present two chip codes, and to each other. This method will not...
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5337345 |
System for securing mobile telephones from unauthorized transmission
A mobile telephone incorporating the invention includes in its transmitter circuitry a system for preventing unauthorized calls from being transmitted by the telephone. The system ensures that the...
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5327483 |
Cordless phone and cordless phone system using such cordless phone
A cordless phone includes a base station coupled to a local line and a personal station communicating with the base station by radio. The base station includes a first channel unit for operatively...
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5299235 |
Time synchronization of a receiver in a digital radio telephone system
A method for improving time synchronization of digital data signals in receivers by using more than one known data sequence to provide a plurality of timing recovery functions and based on these,...
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5297190 |
Radio communication system
A wired line connecting an existing fixed station and a wired telephone network is divided into a plurality of channels on a time division multiplex basis for a digital signal, at least one of the...
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5293380 |
Frame synchronization system among multiple radio base stations for TDMA digital mobile communications system
A TDMA digital mobile communications system prevents TDMA frame synchronization from being asynchronous among radio base stations when a communication held by a mobile station is handed over from...
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5260943 |
TDM hand-off technique using time differences
A subscriber makes its hand-off decision based on time difference measurements between synchronization markers received from adjacent repeaters relative to the synchronization markers received from...
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5210771 |
Multiple user spread-spectrum communication system
A communication system having a site employing a plurality of communication channels. Each channel is assigned a desired received signal strength threshold. A channel is assigned to a subscriber...
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5185739 |
Time-allocation of radio carriers
In a TDMA cellular system, there is provided a mechanism for splitting the allocation of time slots within a TDM frame between adjacent coverage areas. There is provided a method of and apparatus...
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5150362 |
Beacon carrier
In a cellular mobile radio system a method of choosing at a mobile station an appropriate base station and time slot on a time division multiplexed radio channel for the purpose of call set up or...
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5103445 |
Method of adapting a mobile radio communication system to traffic and performance requirements
A method in a mobile radio communication system for adapting the system and communication to prevailing traffic and performance requirement. According to the invention a mobile station inserts...
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