Download Cognitive Radio Networks: Medium Access Control for by Kaigui Bian, Jung-Min Park, Bo Gao PDF

By Kaigui Bian, Jung-Min Park, Bo Gao

This booklet provides a finished assessment of the medium entry regulate (MAC) ideas in cognitive radio networks, with a particular specialize in how such MAC rules allow diverse instant structures to coexist within the comparable spectrum band and perform spectrum sharing. From set of rules layout to the most recent advancements within the criteria and spectrum coverage, readers will reap the benefits of modern wisdom of the way cognitive radio platforms coexist and proportion spectrum assets. assurance comprises cognitive radio rendezvous, spectrum sharing, channel allocation, coexistence in television white area, and coexistence of heterogeneous instant platforms.

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Extra info for Cognitive Radio Networks: Medium Access Control for Coexistence of Wireless Systems

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The system load, L(S), is the minimal load on the busiest element, minimizing over the strategies. A more precise definition follows. Definition 5 Let a strategy W be given for a quorum system S = {q0 , q1 , . . , qκ−1 } over a universal set U . For an element i ∈ U , the load induced by W on i is l W (i) = Wj. q j ∈S:i∈q j The load induced by a strategy W on a quorum system S is LW (S) = max l W (i). i∈U The system load on a quorum system S is L(S) = min {LW (S)} , W where the minimum is taken as the system load over all strategies W .

Aκ + i} mod k, i ∈ [0, k − 1]}; 3. Construct a relaxed cyclic (k, k+1 2 )-difference set D = {a1 , a2 , . . , a k+1 } 2 such that D ∩ D = ∅. Then, construct a majority cyclic quorum system based on D , such as S = {Bi |Bi = {a1 +i, a2 +i, . . , a k+1 +i} mod k, i ∈ [0, k −1]}. 2 Note that |S| = |S | = k, and |D | = k+1 2 ; 4. Use the minimal cyclic quorum system S for assigning the first rendezvous channel h 0 to appropriate slots in a CH sequence u (see lines 4 and 5 in the algorithm); 5. Use the majority cyclic quorum system S to assign the second rendezvous channel h 1 to appropriate slots in a CH sequence u (see lines 6 and 7 in the algorithm).

R · l − 1}, and there is a one-to-one mapping between the element (i · l + j) where i ∈ [0, r − 1], j ∈ [0, l − 1] in the universal set and the array element A[i][ j]. • In the square quorum system [68], a quorum is constructed by picking a full column and a full row of elements from the array. • In the torus quorum system [56], a quorum is constructed by picking a full column c ∈ [0, l − 1] plus l/2 + 1 elements, each of which is located in distinct columns (c + i) mod l, i = 0, . . , l/2 .

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