Reliable, Efficient, and Power Optimized Control-Channel Selection Scheme for Cognitive Radio Networks

Algorithm 1

Dynamic programming code for reliable, efficient, and power optimized (REPO) scheme.

(1)   Input:  p        Number of available channels.

(2)      ℓ         Maximum control-channels (Main CC + Backup CC).

(3)      Q₁ to 𝑄_𝑃        Utility function (capacity, BER and idle time).

(4)    for  𝑤=0  to ℓ

(5)      𝑍[0,𝑤] ← 0

(6)   end

(7)   for    𝑘=1  to p

(8)      for    𝑤=0  to ℓ

(9)       If  (𝑤[𝑘]≤𝑤)&&𝑄_𝑘+𝑍[𝑘−1,𝑤−𝑤[𝑘]]>𝑍[𝑘−1,𝑤]

(10)        {

(11)          𝑍[𝑘,𝑤] = 𝑄_𝑘+𝑍[𝑘−1,𝑤−𝑤[𝑘]]

(12)          Keep[𝑘,𝑤] = 1;

(13)       }

(14)       else

(15)       {

(16)          𝑍[𝑘,𝑤]=𝑍[𝑘−1,𝑤]

(17)          Keep[𝑘,𝑤]=0 ;

(18)       }

(19)      Y  =ℓ;

(20)  for    𝑘=𝑝 to 1

(21)        if    Keep[𝑘,𝑦]=1;

(22)      {

(23)      Output k;

(24)      𝑦=𝑦−𝑤[𝑘];

(25)      }

(26)  Output: 𝑍(𝑝,𝑦)

(27)  }