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5229995 |
Radio link architecture for wireless communication systems
An improved radio link architecture for digital wireless communication systems which is characterized by the use of information and signalling channels on a number of RF carriers, thereby providing...
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5228029 |
Cellular TDM communication system employing offset frame synchronization
An RF cellular TDM communication system employing offset frame synchronization between cells, any cell being omni-directional or directional, such that a frame at one cell is offset by an integral...
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5210752 |
Radio tele-communication system using multichannel access scheme
In a radio tele-communication system of this invention, each mobile station is designed to determine whether a control radio frequency can be used and to determine whether any free time slots are...
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5200957 |
Mobile assisted handoff
The invention relates to a method for communication and handoff in a cellular mobile radio system and a base station and a mobile station for communication and handoff in such a system, in which...
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5200956 |
Communications system for data transmission over a time division duplex frequency channel
A communication system such as a digital cordless telephone system comprises primary (or base) stations (PS) and secondary stations (SS). The primary stations over a local area are coupled to a...
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5195090 |
Wireless access telephone-to-telephone network interface architecture
A wireless-access communications system, such as a CDMA cellular radio-telephone system (FIG. 2), comprises a packet-switched communications network (202, 207, 201) that interconnects cells (base...
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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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5177740 |
Frame/slot synchronization for U.S. digital cellular TDMA radio telephone system
Frame/slot synchronization is applied to a received Time Division Multiple Access (TDMA) signal and a temporal position of a reference feature is acquired, such as a synchronizing bit stream or...
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5170392 |
Intermodulation compensation in a receiver
A receiver 200 automatically compensates for intermodulation of an input signal. The receiver 200 is preceded by a receiver front-end 105 which is coupled to antennas 100-102 receiving the signal....
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5159593 |
Channel acquistion and handoff method and apparatus for a TDMA communication system
A TDMA communication system (100) comprises a two-way subscriber unit (112') and at least two base stations (104b and 104c). The subscriber unit monitors the strengths of signals (114') received...
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5153878 |
Radio data communications system with diverse signaling capability
Method and apparatus are disclosed for accommodating diverse signalling methods and protocols within a single, unified Radio Data Communications system without interference. In this way,...
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5151693 |
Wireless signal transmission system with random access
A central station generates and transmitted data of a transmission format. The transmission format includes an I/B bit indicating permission or inhibition of a new transmission of a next...
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5150954 |
Pager watch system utilizing time slot communication
A method and apparatus for transmitting paging and absolute time information to, and receiving such information at, a remote portable electronic timepiece and pager unit during a short time slot...
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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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5134710 |
Method of transmitting call information in a short range mobile telephone system and a radio unit for carrying out the method
A method of transmitting calls between a radio base station (FS) and one or more portable radio telephones (PS) which are at a short distance from the base station. The base stations of the mobile...
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5111454 |
Digital cellular TDM system employing 6:1 packing of transcoded information
A digital cellular time-division multiple access (TDMA) system including a cellular switch and at least one base site employing 6:1 packing of transcoded information. The system incorporates the...
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5109527 |
Mobile radio communications method avoiding unnecessary transmissions in environment of unknown channel allocation
A method of communication in at least one cellular mobile radio system in an environment of additional mobile radio systems with mobile stations capable of communication with more than one of the...
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5081704 |
Method of arranging radio control channels in mobile communications
According to a method of arranging radio control channels in mobile communications, for covering a service area with a plurality of radio zones and causing base and mobile stations to exchange...
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4972506 |
Method of transmitting data information in a mobile, cellular radio communication system
Method of transmitting data information in a mobile, cellular, radio communication system operating according to the TDMA principle. Within certain large cells (C2) in the system the number of...
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4955082 |
Mobile communication system
A mobile station receives radio waves from all signposts through the positioning channels while making communications using the voice channels. The signal levels of the radio waves thus received...
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4873683 |
TDMA radio system employing BPSK synchronization for QPSK signals subject to random phase variation and multipath fading
A time division multiple access (TDMA) radio system conveying a quadrature phase shift keying (QPSK) modulated data signal is disclosed. In order to overcome multipath distortion and phase...
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4866710 |
Reuse groups for scan monitoring in digital cellular systems
An improved TDMA radiotelephone cellular communication system employs an improved cell site scan monitoring technique. The technique includes monitoring radiotelephone calls, and tracking and...
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4763322 |
Digital radio transmission system with variable duration of the time slots in the time-division multiplex frame
A cellular digital radio transmission system wherein messages are transmitted from a base station to a plurality of mobile stations assigned to it by time-division multiplexing of time slots in...
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4754453 |
Digital radio transmission system with a connection-accompanying organization channel in the time-division multiplex frame
Method of digital radio transmission between a base station and a plurality of mobile stations. A time division multiplexed signal frame is generated, including a plurality of time slots which...
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4748681 |
Integrated-services radio transmission system
In a two-way radio transmission system, a fixed base station transmits and receives over at least one communication channel a plurality of messages for different types of receivers (TGAx) used in...
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4730310 |
Terrestrial communications system
A terrestrial radio system which utilizes spot beams, time division multiple access and frequency reuse to provide communications services from a base station to remote customers within a system...
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4408322 |
Method and apparatus for measuring signal to noise ratio in a TDMA communications system
A method and apparatus for measuring signal to noise ratio in a time division multiple access (TDMA) communications system which does not require that normal communications be interrupted. The...
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4129755 |
Frame synchronizing system for TDMA radio communications
A frame synchronizing equipment is disclosed which enables the TDMA technique to be used in a mobile communication system or a small-scale stationary communication system and requires no reference...
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4031330 |
Digital radio transmission system
A digital radio transmission system including a master station and a plurality of slave stations, in which the transmit and receive periods of all the slave stations are under control of the master...
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