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CAN with flexible Data Rate
See the BOSCH white paper on CAN-FD (V1.1)
Extended CAN protocol where the data field is transmitted with a higher bit rate than the arbitration field. Another improvement is the bigger pay-load up to 32 or 64 bytes per CAN frame are in discussion.
Official introduced by BOSCH at the 13th international CAN Conference in March 2012
Since May 2012 the new M_CAN manual contains specific information on CAN FD used in this FPGA IP.
The Linux CAN device driver can4linux supports this frame format already in it's 'virtual' mode.