Logical channel mapping method for frequency hopping transmission of multi-carrier digital multimedia wireless broadcasting

Abstract

The invention provides a logical channel allocation method when digital multimedia wireless broadcasting adopts frequency hopping transmission, and models the logical channel allocation problem when frequency hopping transmission is adopted in digital multimedia wireless broadcasting as a coloring problem; constructs a coloring subgraph; Graph coloring, and determine whether the coloring is successful; if not, adjust the parameters of the current coloring subgraph when the parameters of the current coloring subgraph can be adjusted, and then construct the coloring subgraph; if so, color the remaining coloring subgraphs, if all If the coloring of the coloring subgraph is successful, the allocation of logical channels is successful; if the coloring of one coloring subgraph fails, the allocation of logical channels fails. When the digital multimedia wireless broadcasting of the present invention adopts frequency hopping transmission, the logical channel allocation method makes the time interval of frames from the same logical channel of the same type of broadcasting on each carrier frequency at least greater than the frequency hopping protection time, so that the same logical channel The broadcast frames in the group also meet the requirement of frequency hopping protection time on multiple carrier frequencies.

Description

technical field [0001] The invention relates to the technical field of radio and television communication, in particular to a logical channel allocation method when digital multimedia wireless broadcasting adopts frequency hopping transmission. Background technique [0002] With the rapid development of information technology, television has begun to shift from the first generation of digital television (DVB-C, DVB-S, DVB-T, ATSC, ISDB-T, CMMB and DTMB) to the second generation of digital television on a global scale. Rapid development of TV (DVB-C2, DVB-S2, DVB-T2 and ATSC3.0). In China, as early as 2010, the "decision to speed up the integration of the telecommunications network, the radio and television network and the Internet" was proposed, and it was also pointed out that "the integration of the telecommunications network, the radio and television network and the Internet should be promoted to realize the interconnection of the three networks and the resources Sharing...

AI Technical Summary

Problems solved by technology

In the prior art, on the basis of obtaining the frame structure allocation pattern, the classic backtracking algorithm is used to solve the coloring problem. The advantage is that the algorithm is simple, and the disadvantage is that it does not support logical channel group frequency hopping transmission and takes a long time to calculate

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