Cooperation Schemes Between the Primary Transmitter and Untrusted Secondary Transmitters in Cognitive Radio Networks Using Game Theory[J]. 2016, 50(2): 61-67.
DOI:
Cooperation Schemes Between the Primary Transmitter and Untrusted Secondary Transmitters in Cognitive Radio Networks Using Game Theory[J]. 2016, 50(2): 61-67.DOI: 10.7652/xjtuxb201602011.
Cooperation Schemes Between the Primary Transmitter and Untrusted Secondary Transmitters in Cognitive Radio Networks Using Game Theory
Two cooperation schemes using game theory are proposed to solve the problem that the untrusted secondary transmitters(STs)will eavesdrop on the primary link in cognitive radio networks and to covert the hostile relation between the primary transmitter(PT)and STs into a cooperative one
and they are a Stackelberg scheme and an improved two-layer game.The STs work in half-duplex and prefer to transmit than to eavesdrop in the Stackelberg scheme. Hence
the PT plays the Stackelberg game with each ST
and then selects the ST who creates more interference to the unselected STs(i.e. the potential eavesdroppers)to transmit simultaneously. The Stackelberg scheme is then extended into a two-layer game to facilitate the competition among the STs. The outer framework is still a Stackelberg model and the PT plays game with all the STs as an entity
while the inner has an auction framework in which each ST improves its security rate as much as possible for the access opportunity. The PT will conduct cooperation with the ST having the highest security rate
so that more profit can be obtained. Numerical results show that application of these two proposed schemes results in a significant improvement: the security rate of the two schemes increases by 63% and 68% respectively
and the access opportunity of STs is 56% and 71% respectively.
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