%0 Electronic Article %A Sahar Talebi %+ Operations Research and Department of Computer Science, North Carolina State University, Raleigh, USA %A Iyad Katib %+ Computer Science Department, King Abdulaziz University, Jeddah, Saudi Arabia %A George N. Rouskas %+ Operations Research and Department of Computer Science, North Carolina State University, Raleigh, USA %+ Computer Science Department, King Abdulaziz University, Jeddah, Saudi Arabia %K distance adaptive routing %K multiprocessor scheduling problem %K distance-adaptive routing and spectrum assignment %K distance-adaptive spectrum allocation %K ring topology %K spectrum width %X Distance adaptive spectrum allocation exploits the tradeoff between spectrum width and reach to improve resource utilisation by tailoring the modulation format to the level of impairments along the path. The authors first show that the distance-adaptive routing and spectrum assignment (DA-RSA) problem is a special case of a multiprocessor scheduling problem. The authors then develop a suite of efficient and effective DA-RSA algorithms for ring networks, that build upon list scheduling concepts. This work explores the tradeoffs involved in DA-RSA algorithm design, and opens up new research directions that may leverage the vast literature in scheduling theory. %@ 2047-4954 %T Distance-adaptive routing and spectrum assignment in rings %B IET Networks %D May 2016 %V 5 %N 3 %P 64-70 %I Institution of Engineering and Technology %U https://digital-library.theiet.org/;jsessionid=1r8sea9nbdcgk.x-iet-live-01content/journals/10.1049/iet-net.2015.0085 %G EN