Motorola Corporation

William H Kilner

Thomas Wayne Lockhart

Farzan Mamaghani

Karl Anthony Reardon

Geoffrey Richard Scotton

Bud Fraser

Brian L Douthitt

Mark S Scivier

Richard Mosher

Nazira Chatur

Robert Wiebe

A method of operation of a data communications system (5) with session control having a data communications network (10) and at least a first communications device (1), a second communications device (2) and a third commnunications device (3) in communications with the data communications network (10). The data communications network (10) identifies a fault status change in communications with the first communications device (1), generates a session control command (6) with an identification number (7) attached responsive to identifying the fault status change and sending the session control command (6) to at least the second and the third communications devices (2 and 3). At least at the second communications device (2), the second communications device (2) receives the session control command (6), deter-mines from the identification number (7) whether the second communications device (2) is affected by the fault status change and selectively performs a session control action in response thereto.

Data communications system with session control

In a data communications system, including an infrastructure arranged to communicate over a data channel with a plurality of data terminals, a method of detecting data decryption errors in a data packet includes receiving an encrypted data packet (213); decrypting the encrypted data packet to provide a decrypted data packet; and comparing a reference value to a portion of the decrypted data packet to determine when a predetermined relationship is satisfied (221).

Methods of detecting decryption errors

In a redundant controller system having an active controller (112) with an active data base and a standby controller (115) with a standby data base, the active controller (112) operably coupled to the standby controller (115), the active data base including a plurality of records, the plurality of records subject to modification, a method of updating the standby data base to mirror the active data base including modifying a record, the record including a record checksum, incorporating the record checksum into a virtual checksum (322) for the active data base, communicating the record including the record checksum to the standby data base (324), incorporating the record checksum into a standby checksum (410, 412) for the standby data base, and comparing the standby checksum to the virtual checksum (312) to insure the standby data base mirrors the active data base.

Method and apparatus for maintaining a redundant database system

In a data communication system (100) including infrastructure (101) arranged to communicate with a plurality of terminals (103) over a channel (109), a method of adaptable registration includes determining a registration status (401), and executing a registration contention procedure adaptable to the registration status (403). A corresponding method of facilitating adaptable registration includes determining a registration contention information (501), the registration contention information corresponding to a contention procedure implemented by the plurality of terminals, and sending a message corresponding to said system registration information (519).

Methods of terminal registration

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Monroe, WA, United States of America

William H Kilner