Watkins- Johnson Company

Dynamic Telecommunications, Inc.

Jelena Vucetic

Paul A Kline

John Plaschke

A hybrid radio transceiver that includes one wideband receiver and multiple narrowband transmitters for use in wireless networks, having the advantage of providing lower cost but performance that is comparable to a transceiver that uses multiple narrowband transceivers. The hybrid radio transceiver provides software defined parameters to achieve flexibility in modulation and protocol types. The hybrid radio transceiver is adaptable to both capacity intensive and wide coverage applications, and supports communication links that are imbalanced in terms of data transmission capacity. The wideband receiver, of the hybrid radio transceiver, converts the RF to an IF which is digitized and passed to digital signal processors for tuning, filtering, demodulation and protocol control with eventual interface to the network. The narrowband transmitters, of the hybrid radio transceiver, use a variety of processes which include modulation in a narrowband exciter which feeds a narrowband power amplifier then combination of the signals before the antenna, or use of a multi-carrier power amplifier and low power combiner.

Hybrid radio transceiver for wireless networks

A plurality of base stations communicate with a plurality of mobile units. Each base station includes a base station transceiver that receives inbound information from the mobile units and transmits outbound information to the mobile units. A mobile switching center (MSC) is coupled to the base stations and communicates the inbound information and outbound information with the base stations. The base stations each include signal detectors that detect signal strength of the inbound information, co-channel information and adjacent channel information. The MSC maintains a table of signal strength per communication channel and allocates communication channels to the base stations based on the signal strength information. The inventive dynamic channel allocation includes several channel allocation algorithms that can be active at the same time. Only one of the algorithms is active at a time. The choice of the algorithm is based on current interference conditions and traffic load. The invention is implemented in the MSC and base stations of a digital cellular network using wideband technology for its air interface. While the decision-making mechanism and the channel allocation algorithms are implemented in the MSC, the protocol between the MSC and base stations is extended to support the proposed concept for dynamic channel allocation. Advantages of the invention includes improved communication and reduced interference.

Wireless communication system with dynamic channel allocation

A base station (BS) communicates with a plurality of mobile users in a platform. In one embodiment, the base station and mobile services center (MSC) associates all the mobile users with the platform. The BS and MSC then associate a movement of the platform from one cell to another with a handoff of all the mobile users in the platform. The handoff is complete while the overhead is minimized. Exemplary embodiments are provided for use with the Advanced Mobile Phone Service (AMPS) protocol.

Apparatus and method for improving cellular communication by associating

A network management method and appartus for wireless terminals. The method and apparatus comprises a new generation of wireless terminals having digital signal processors that can monitor the operating characteristics of the associated wireless terminals and report those characteristics to a network management computer. The network management computer receives communications from the wireless terminals and takes corrective action for out-of-specification conditions and updates the associated DSPs with corrections and flexible dialing instructions. The network management computer also gathers utililization statistics reported to it by the wireless terminals. The wireless terminals can be initialized by direct connection to the wireless terminal with a simple telephone instrument or can be initialized over the air by the network management computer.

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Germantown, MD, United States of America

Jelena Vucetic