5. Explain what David P. Reed means when he talks about cooperation gain. A wire

Question

5. Explain what David P. Reed means when he talks about cooperation gain. A wireless device is using a cooperative commons to connect to a gateway to the Internet.

a. Why might it be beneficial to the user of this device to transmit at a power that is greater than the minimum power needed to reach the gateway?

b. How does David Reed suggest that this device be encouraged to reduce its power?

D. Reed "Comments for FCC Spectrum Task Force on Spectru Policy July 10 2002. www.reed.com/dpr/locus/openspectrum/fcc02-135Reed.doc

Explanation / Answer

5) According to cooperation gain the use of antenna arrays has been recently proposed as a way to form virtual antenna arrays that provide dramatic gains in slow fading wireless environments.

a) The user should transmit at a higher power than required because if the sufficient power is used then it may happen that due to interference and other environment losses the signal couldn't reach the destination so to avoid this situation it is required to transmit at higher power than required.

B)According to David P reed the scheme has to first select the best relay out of set of available relays and then use this

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