Title :
Link adaptation framework for video transmission over WiMAX using MDP over cross-layer approach
Author :
Bin Salem, Ali Abdulqader ; Yung-Wey Chong ; Shannon, Ali ; Tat-Chee Wan
Author_Institution :
Nat. Adv. IPv6 Centre, Univ. Sains Malaysia, Minden, Malaysia
Abstract :
Modulation and Coding Schemes (MCSs) is one of the parameters that can be adapted according to the channel condition. The IEEE 802.16 system specifies several MCSs, such as QPSK, 16-QAM, 64-QAM in case of modulation and 1/2, 2/3, 3/4, 5/6 in case of coding. However, the specification does not provide a policy to select MCS for various link conditions. In this paper, we study the problem of Link adaptation (LA) for adapting modulation level of a point-to-point system according to channel condition, SNR of receiving data, and FER in order to maximize system throughput and minimize FER. The LA model in this proposed work is based on downward cross-layer design approach between MAC and physical layers and adopting Markov Decision Process (MDP) over cross-layer design approach to optimize the adapting modulation level.
Keywords :
Markov processes; WiMax; access protocols; minimax techniques; modulation coding; radio links; video coding; video communication; wireless channels; FER minimization; IEEE 802.16 system; LA model; MAC; MCS; MDP; Markov decision process; SNR; WiMax; channel condition; cross-layer design approach; link adaptation problem; modulation and coding scheme; modulation level optimization; physical layer; point to point system; system throughput maximization; video transmission; Encoding; Equations; Mathematical model; Modulation; Physical layer; Signal to noise ratio; Throughput; Cross-layer approach; Link adaptation; Markov decision process; Signal-to-noice ratio;
Conference_Titel :
Communication, Networks and Satellite (COMNETSAT), 2013 IEEE International Conference on
Conference_Location :
Yogyakarta
DOI :
10.1109/COMNETSAT.2013.6870867
