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Most existing multichannel Medium Access Control (MAC) protocols have at least one of the following four performance bottlenecks: global synchronization among users; dedicated control channel for signaling exchange; dedicated control phase for signaling exchange; and complete knowledge of all users' channel selection strategies. In this paper, the authors first design a hopping sequence by combining multiple difference sets to ensure a high rendezvous probability of users over multiple channels. Applying the hopping sequence to all users, they then propose a Difference-Set-based Multichannel MAC (DSMMAC) protocol to overcome the performance bottlenecks.
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