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Channel hopping based parallel rendezvous multichannel MAC protocols have several advantages since they do not need a control channel, require only one transceiver, and produce higher system capacity. However, channel hopping sequences in existing parallel rendezvous MAC protocols have been designed as irrelevant to channel data-rates, leading to under-utilization of channel resources in multi-rate multi-channel networks. Considering that data-rates among channels may be different, the authors propose a dynamic parallel rendezvous multichannel MAC protocol for synchronized cognitive radio networks in which the secondary users adjust their own distinct hopping sequences according to the data-rates of the available channels, in a data-rate-aware manner.
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