Patent ID: 8442531

Claim:
A method comprising: transmitting, from a wireless node, a first data unit via a first channel of a first frequency band of a plurality of frequency bands; selecting a second frequency band of the plurality of frequency bands; performing a context transfer at the wireless node from the first frequency band to the second frequency band; transmitting, from the wireless node, a second data unit via a second channel of the second frequency band; and retransmitting, after performing the context transfer, the first data unit via the second channel of the second frequency band, wherein retransmitting the first data unit via the second channel of the second frequency band is part of one of: an automatic repeat request (ARQ) process; a hybrid ARQ (HARQ) process in which data units are encoded using an error-correction code and error-detection information is appended to the data unit before transmission or retransmission; a chase combining HARQ process in which the first data unit is coded and retransmitted via the second channel of the second frequency band; and an incremental redundancy HARQ process in which the first data unit transmitted via the first channel of the first frequency band and the retransmitted first data unit retransmitted via the second channel of the second frequency band are encoded differently or coded using different coding rates and puncturing techniques.