Open AccessA link adaptation scheme for the downlink of mobile hotspot
Author(s) -
Hasan Md. M.,
Mark Jon W.,
Shen X.
Publication year - 2012
Publication title -
wireless communications and mobile computing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.42
H-Index - 64
eISSN - 1530-8677
pISSN - 1530-8669
DOI - 10.1002/wcm.1080
Subject(s) - computer science , telecommunications link , wimax , link adaptation , orthogonal frequency division multiple access , computer network , hotspot (geology) , frequency division multiple access , mimo , coding (social sciences) , orthogonal frequency division multiplexing , real time computing , telecommunications , wireless , fading , channel (broadcasting) , mathematics , geophysics , geology , statistics
A link adaptation (LA) scheme for the downlink of mobile hotspot, which is supported by an IEEE 802.16e or mobile WiMAX network, is proposed. The mobile WiMAX uses orthogonal frequency division multiple access (OFDMA) in its physical layer. The main function of the LA scheme is to select an appropriate burst profile, which includes a multiple input multiple output (MIMO) transmission mode, modulation technique, and coding scheme. We formulate a discrete optimization problem for the LA scheme by maximizing the throughput. An algorithm to implement the LA scheme is also proposed. Numerical results show that the proposed LA scheme exhibits good performance. Copyright © 2011 John Wiley & Sons, Ltd.