The invention discloses a dual-mode communication method and
system, and belongs to the field of digital
information transmission, and the dual-mode communication method comprises the following steps: dynamically formulating a segmentation strategy according to the real-time bandwidth,
delay and reliability indexes of two channels, and when an
original data stream is segmented into
independent data packets, carrying out the segmentation of the
independent data packets; distributing a globally unique and progressive increasing serial number for each data packet; compared with the prior art, the method has the advantages that when the data packet needs to be reissued, the bandwidth resources of the
main channel are detected, when the bandwidth resources of the
main channel are sufficient, the data packet is reissued through the
main channel, and when the bandwidth resources of the main channel are insufficient, the bandwidth resources of the main channel are sufficient, the bandwidth resources of the main channel are not sufficient. The data packets are reissued through the auxiliary channel, the
missing data packets are reissued through the auxiliary channel by using a forced interruption mechanism, but the auxiliary channel is used as a standby reissuing channel, so that interruption is not frequently caused,
throughput reduction caused by frequent
preemption is avoided, and use requirements are met.