tailieunhanh - Báo cáo hóa học: " Research Article Packet-Scheduling Algorithm by the Ratio of Transmit Power to the Transmission Bits in 3GPP LTE Downlink"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Packet-Scheduling Algorithm by the Ratio of Transmit Power to the Transmission Bits in 3GPP LTE Downlink | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID251281 8 pages doi 2010 251281 Research Article Packet-Scheduling Algorithm by the Ratio of Transmit Power to the Transmission Bits in 3GPP LTE Downlink Jungsup Song 1 Gye-Tae Gil 2 and Dong-Hoi Kim1 1 School of Information Technology Kangwon National University 192-1 Hyoja-dong Chuncheon 200-701 Republic of Korea 2 Central R D Laboratory Korea Telecom KT 463-1 Jeonmin-dong Yuseong-gu Daejeon 305-811 Republic of Korea Correspondence should be addressed to Dong-Hoi Kim donghk@ Received 22 February 2010 Accepted 13 July 2010 Academic Editor Neal N. Xiong Copyright 2010 Jungsup Song et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Packet scheduler plays the central role in determining the overall performance of the 3GPP long-term evolution LTE based on packet-switching operation. In this paper a novel minimum transmit power-based MP packet-scheduling algorithm is proposed that can achieve power-efficient transmission to the UEs while providing both system throughput gain and fairness improvement. The proposed algorithm is based on a new scheduling metric focusing on the ratio of the transmit power per bit and allocates the physical resource block PRB to the UE that requires the least ratio of the transmit power per bit. Through computer simulation the performance of the proposed MP packet-scheduling algorithm is compared with the conventional packet-scheduling algorithms by two primary criteria fairness and throughput. The simulation results show that the proposed algorithm outperforms the conventional algorithms in terms of the fairness and throughput. 1. Introduction The 3GPP long-term evolution LTE standard which is a subset of the upgraded specifications of 3G network