초록 ▼

A battery-powered portable radio conserves battery power while the radio monitors messages transmitted over a radio channel, e.g., a radio control channel, Message processing circuitry processes a detected message and stores that message in memory. Before processing a subsequently detected message,

A battery-powered portable radio conserves battery power while the radio monitors messages transmitted over a radio channel, e.g., a radio control channel, Message processing circuitry processes a detected message and stores that message in memory. Before processing a subsequently detected message, the subsequent message is compared with the stored message. It they do not match, the subsequently detected message is subjected to further processing including voting, matching, validity, checking, etc. However, if they match, the subsequent message is ignored as a redundant message and a power savings mode is entered to conserve battery power.

대표청구항 ▼

[ What is claimed is:] [1.] A method for operating a portable radio that monitors a radio channel and receives message frames transmitted on the radio channel, each message frame including an identifier and control part and a messaging part, comprising the steps of:(a) in a first power mode where th

[ What is claimed is:] [1.] A method for operating a portable radio that monitors a radio channel and receives message frames transmitted on the radio channel, each message frame including an identifier and control part and a messaging part, comprising the steps of:(a) in a first power mode where the portable radio operates at a first power level, processing an initial message frame received on the channel;(b) storing the processed message frame;(c) for a subsequent message frame received on the channel, comparing the message part of the subsequent message frame with at least a portion of the stored message frame;(d) if the comparing step does not result in a match, continuing processing of the received message frame in the first power mode; and(e) if the comparing step results in a match, entering a second power mode where the portable radio operates at a second power level lower than the first power level such that the portable radio consumes less power in the second power mode than in the first power mode and where the continued processing of the received message frame in the first power mode is not performed,wherein the portable radio continues to receive a next message frame from the radio channel at the second power level, and after receiving the next message frame, the portable radio repeats steps (c), (d), and (e).