ns-2 module for ieee 802.22 standard
ns-2 module for ieee 802.22 standard
ns-2 module for ieee 802.22 standard
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Quiet Period Management <strong>for</strong> Se<strong>ns</strong>ing<br />
• Se<strong>ns</strong>ing is a two-stage process<br />
– Stage 1: Fast se<strong>ns</strong>ing (1 ms duration)<br />
– Stage 2: Only if needed, per<strong>for</strong>m fine se<strong>ns</strong>ing (more detailed se<strong>ns</strong>ing – 25 ms<br />
duration)<br />
• Fast se<strong>ns</strong>ing is per<strong>for</strong>med in-band only<br />
• If something is detected during the fast se<strong>ns</strong>ing stage, BS<br />
determines the begin of the fine se<strong>ns</strong>ing stage<br />
• If a particular signature of a tra<strong>ns</strong>mitted signal is detected<br />
during fine se<strong>ns</strong>ing, a BS per<strong>for</strong>ms an out-of-band se<strong>ns</strong>ing<br />
(detects an empty channel to continue tra<strong>ns</strong>mission)<br />
2/3/2010<br />
Ns-2 Module <strong>for</strong> IEEE <strong>802.22</strong> Standard<br />
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