Abstract—HARQ is a stop and wait protocol supporting soft combination of retransmitted data which is used for facilitating fast error detection and correction. In Long term Evolution (LTE), HARQ is implemented by MAC level module called HARQ entity. The justification of HARQ retransmissions lies in recovering data correctly, though they consume radio resources. In this paper, it is proposed that the maximum number of HARQ retransmissions in downlink may be limited in order to save radio resources for UEs with poor radio link in LTE. Adequate simulation results with LTE link level simulator strengthen the basis of this proposal.
Index Terms—CQI, HARQ, LTE, retransmission.
Mohammad T. Kawser and Nafiz Imtiaz Bin Hamid are with the Department of Electrical and Electronic Engineering, Islamic University of Technology (IUT), Board Bazar, Gazipur-1704, Bangladesh (e-mail: firstname.lastname@example.org, email@example.com).
Md. Nayeemul Hasan is with the Electrical and Electronic Engineering Department, American International University of Bangladesh (e-mail:firstname.lastname@example.org).
M. Shah Alam is with the Banglalion Communication Ltd. Bangladesh (e-mail: email@example.com)
M. Musfiqur Rahman is a Masters student in University of Western Ontario, Canada (e-mail: firstname.lastname@example.org )
Cite: Mohammad T. Kawser, Nafiz Imtiaz Bin Hamid, Md. Nayeemul Hasan, M. Shah Alam, and M. Musfiqur Rahman, "Limiting HARQ Retransmissions in Downlink for Poor Radio Link in LTE," International Journal of Information and Electronics Engineering vol. 2, no. 5, pp. 707-709, 2012.