Dynamic routing and wavelength assignment algorithm of optical satellite networks based on cross-layer design |
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Authors: | Wen Guoli Zhang Qi Tian Qinghua Wang Houtian Tao Ying Chen Dong Liu Naijin Shen Yufei Zhou Na |
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Institution: | 1. School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, P.R.China;2. China Academy of Space Technology, Beijing 100094, P.R.China |
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Abstract: | In order to overcome the adverse effects of Doppler wavelength shift on data transmission in the optical satellite networks, a dynamic routing and wavelength assignment algorithm based on cross-layer design ( CL-DRWA) is introduced which can improve robustness of the network.Above all, a cross-layer optimization model is designed, which considers transmission delay and wavelength-conti-nuity constraint, as well as Doppler wavelength shift.Then CL-DRWA is applied to solve this mod-el, resulting in finding an optimal light path satisfying the above constraints for every connection re-quest.In CL-DRWA, Bellman-Ford method is used to find an optimal route and a distributed rela-tive capacity loss method is implemented to get an optimal wavelength assignment result on the opti-mal route.Moreover, compared with the dynamic routing and wavelength assignment algorithm based on minimum delay strategy ( MD-DRWA) , CL-DRWA can make an improvement of 5.3%on the communication success probability.Meanwhile, CL-DRWA can meet the requirement of trans-mission delay for real-time services. |
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Keywords: | cross-layer design Doppler wavelength shift dynamic routing and wavelength as-signment optical satellite network |
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