Rockwell International Corporation

C David Young

Daniel O Weddle

Melvin G Bebee

Bill C Miller

Richard C Sunlin

W P Werth

Richard J Waldschmidt

James A Stevens

A method for establishing simultaneous communications between nodes having neighboring nodes in a multi-hop network of transceiver nodes arranged in neighborhoods includes determining the quality of communication links between the nodes of a neighborhood and adjacent neighborhoods. A table of quality data is stored representing the quality of communication links between nodes of the neighborhood for each node. A set of performance criterion of desired service in the neighborhood is stored. A set of possible link assignments between ones of the nodes in the neighborhood is generated from the table of quality data based upon a maximized performance criterion of desired service in the neighborhood. Link assignments are then allocated between nodes of the neighborhood based upon the desired performance criterion.

Simultaneous channel access transmission method for a multi-hop

In a skywave communication setting, a number of independent measurement techniques can be employed simultaneously and their results combined to yield a metric representative of the channel quality during a particular reception. This sample can then be combined with previous samples taken using the same frequency (or same frequency hop set in a frequency hopping system) to serve as a basis for selecting the best operating frequencies.

Method of selecting optimum frequency in skywave communication apparatus

In the skywave adaptable communication network, the time required to initiate communications between two transceivers can often be an important factor where the propagation characteristics of signals at various frequencies may vary drastically with time. The present invention not only improves upon known prior art by accepting the first frequency that it hears as a communication frequency when two nodes are attempting to communicate from a known list of probe and default frequencies to be transmitted at known times, it uses an 'announce and do' protocol to establish initial link-up and to change traffic frequencies or other system parameters once link-up has occurred to obtain coordination between both communicating nodes in a network of communicating nodes. The announce and do protocol requires multiple frequency announcements but the multi-frequency can be traffic frequency and a probe frequency or it can be multiple traffic frequencies whereby there is another communicating channel besides the channel which is involved in the changed system parameters. Once link-up has occurred, the probe signals are used to allow the system to then adaptively change the traffic frequencies to obtain better quality traffic signals, as these better quality probe signals are received, analyzed and compared with the quality of the present working frequency signals.

Skywave adaptable network transceiver apparatus and method using a

In a skywave adaptable communications network, the time required to initiate communications between two transceivers can often be an important factor where the propagation characteristics of signals at various frequencies vary drastically with time. The present invention improved upon the prior art by accepting the first frequency that it hears as a communication frequency when two nodes are attempting to communicate from a known list of frequencies to be transmitted at known times. The system then adaptively changes to better quality signals as these better quality signals are received, analyzed and compared with present working frequency signals.

Skywave adaptable network transceiver apparatus

In a skywave adaptable communication network, the time required to initiate communications between two transceivers can often be an important factor where the propagation characteristics of signals at various frequencies may bary drastically with time. The present invention not only improves upon known prior art by accepting the first frequency that it hears as a communication frequency when two nodes are attempting to communicate from a known list of probe frequencies to be transmitted at known times, it initially uses predictive frequencies in probe signal format during the time that would later be used for traffic information after link-up has occurred where the predictive frequencies may be based on algorithms, experience or whatever. Once link-up has occurred, the probe signals are used to allow the system to then adaptively change to better quality signals as these better quality signals are received, analyzed and compared with present working frequency signals.

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Richardson, TX, United States of America

C David Young