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Cognitive Wireless Networking in the TV Bands - page 21 / 56

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CMAC Overview

Sender

Receiver

DATA

ACK

DATA

ACK

DATA

ACK

RTS

CTS

DTS

Waiting Time

RTS

Indicates intention for transmitting

Contains suggestions for available time-spectrum block  (b-SMART)

CTS

Spectrum selection (received-based)

(f,f, t, t) of selected time-spectrum block

DTS

Data Transmission reServation

Announces reserved time-spectrum block to neighbors of sender

t

t+t

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