Patent ID: 8223867
Filing Date: 2012-07-17
Classification: H04L,H04W

Abstract:
1. A data communication apparatus, comprising: a controller arranged to establish communication in a first mode with another data communication apparatus, the controller arranged to switch to communication in a second mode with said another data communication, apparatus after communication is established; an input for receiving original data bits that are to be transmitted via a communication channel to said another data communication apparatus; an encoder coupled to said input for applying to the original data bits an encoding algorithm that produces parity bits; an output for providing bits that are to be transmitted across the communication channel; and a data path coupled between said encoder and said output, said data path receiving information from said another data communication apparatus, said data path selecting one of the original data bits with Cyclical Redundancy Check (CRC) bits and the parity bits in response to an acknowledgement, said data path selecting the other of the original data bits with CRC bits and the parity bits in response to a negative acknowledgement indicating that an earlier transmission has not been received correctly at said another communication apparatus, said data path responsive to the ne ative acknowledgement for changing its selection from one of the original data bits with CRC bits to the other of the original data bits with. CRC bits and the parity bits, to be provided to said output for transmission across the communication channel to said another data communication apparatus.