[1] Comsats Univ, Dept Comp Sci, Islamabad 45550, Pakistan
[2] Univ Malaysia Sabah, Fac Comp & Informat, Kota Kinabalu, Malaysia
[3] Abdul Wali Khan Univ, Dept Comp Sci, Mardan, Pakistan
[4] King Faisal Univ, Coll Comp Sci & Informat Technol, Dept Comp Networks & Commun, Al Hasa, Saudi Arabia