Motorola Corporation

Frederick Loring Kampe

Robert Nathan Nelms

Edgar Herbert Callaway, Jr

Scott Christopher Smith

Michael J DeLuca

Jheroen Pieter Dorenbosch

Michael Joseph DeLuca

Gary L Pace

James David Hughes

Gary J Morse

Hagai Ohel

Kenneth Philip Greene

Marcus A Gade

John K Gleeson

An updateable message encoder/transmitter (100) has a processor (109) for encoding messages and message updates. A message includes an origination time (191), a version number (410) and an update lifetime indicator (424), and a message update includes the origination time (191) and the version number. A transmitter (120) broadcasts the message and the message update message receiver/decoder (130) receives the message and the message update, a processor (212) processes the message to determine when the message update is being received. The processor checks the update lifetime indicator of the message indicated by the message update to determine if the message to which the message update is intended can be updated. A comparator compares the origination time of the message with the origination time of the message update to determine if the message update is an out-of-sequence message update.

System and method for including origination time and update lifetime

A selective call device (130) has a receiver (204) for receiving a selective call signal including an address (312). An address correlator (214) coupled to a decoder (212) determines that the selective call signal is directed thereto and determines whether the selective call signal includes an update command (400, 500). The update command includes a major version number (406, 506), topic numbers associated with sub-message(s) stored in the selective call device, update data associated with each topic number for updating the sub-messages, and minor version numbers (427, 527) associated with each topic number. The major version number is incremented when a sub-message template is changed. Minor version numbers are incremented after each update. The selective call device updates a sub-message with update data only if the update command includes a current major version number and an incremented minor version number.

Reliably updating an information service message

A selective call device (130) has a receiver (204) for receiving a selective call signal including an address (312) and a topic sub-address (504) indicative of a subscribed information, a processor (212, 214) for correlating the address (312) in the selective call signal to determine when the selective call signal is directed thereto, a decoder (212), in response to the processor (212, 214) determining that the selective call signal is directed thereto, for decoding the topic sub-address (504) to determine when the selective call signal includes the subscribed information, and a battery saver, coupled to the receiver (204), for initiating battery saving when the address (312) does not correlate with a predetermined address of the selective call device (130) and for initiating battery saving when the topic sub-address (504) is absent from the selective call signal.

Selective call device and method for battery saving during information

A receiver circuit (10), and method for automatic frequency control of a receiver circuit (10) suitable for receiving a radio frequency (RF) signal, featuring determination of at least one parameter other than a frequency error of a signal which is mixed with the RF signal received by the receiver circuit; and adjusting the frequency of the signal which is mixed with the RF signal based on the frequency error if the at least one parameter satisfies a predetermined criterion.

Method and apparatus for an automatic frequency control receiver

A selective call receiver (100) uses a method of partial address correlation to decode a portion of a selective call signal transmitted by a radio communication system so as to reduce energy consumption of the selective call receiver (100). The selective call receiver (100) is programmed to receive the portion of the selective call signal from the radio communication system, determine a first probable energy E.sub.1 that would be dissipated by the selective call receiver if it were to use partial address correlation, and compare the first probable energy E.sub.1 to a second probable energy E.sub.2 that would be dissipated by the selective call receiver if it did not use partial address correlation. If E.sub.1 is less than E.sub.2, then partial address correlation is used.

Method in a selective call receiver for applying conditional partial

A method for determining whether a baud rate of a frequency modulated (FM) signal received by a receiver matches a predetermined baud rate. A parameter other than the baud rate is detected and used to confirm whether baud rate detection should be made, or whether if made, is reliable. The parameter is frequency deviation of the received FM signal, or other suitable parameters of the received FM signal.

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Boynton Beach, FL, United States of America

Frederick Loring Kampe