Patent ID: 7359343

Claim:
A wireless frequency hopping digital communications system, where communications in successive data frames occur on different wireless carrier frequencies, comprising: a transmitter configured for transmitting: a first block of digital data during a primary data transmission period of a data frame where the first block of digital data has not been previously transmitted; and a second block of digital data during a redundant data transmission period of the data frame, where the second block of digital data was previously transmitted at a different carrier frequency during a primary data transmission period of a prior data frame; and a receiver configured for receiving: a third block of digital data during a primary data receive period of the data frame, where the third block of digital data has not previously been received; and a fourth block of digital data during a redundant data receive period of the data frame, where the fourth block of digital data was previously received at a different carrier frequency during the primary data receive period of the prior data frame, wherein the transmitter is further configured to transmit the second block of data only if the battery power level of a battery-powered wireless communications device utilizing the data frame exceeds a predetermined level, and wherein the receiver is further configured during every data frame to receive in the primary data receive period a block of digital data not previously received and configured to receive in the redundant data receive period a block of digital data received in the primary data receive period of a prior data frame even if the battery power level of a battery-powered wireless communications device utilizing the data frame does not exceed the predetermined level.