Abstract
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.
Highlights
The 3GPP long-term evolution (LTE) standard, which is a subset of the upgraded specifications of 3G network system, aims at the goals such as peak data rate of 100 Mbps in downlink and 50 Mbps in uplink, throughput increase at the cell boundary, spectral efficiency improvement, and scalable bandwidth [1,2,3]
The proposed minimum transmit power-based (MP) packet scheduling algorithm is compared with the conventional maximum throughput (MT), round robin (RR), and proportional fair (PF) packet scheduling algorithms
UEs with poor channel quality indication (CQI) can be given a higher priority in the PF algorithm by using a different metric from the MT algorithm as divided by the past average data rate
Summary
The 3GPP long-term evolution (LTE) standard, which is a subset of the upgraded specifications of 3G network system, aims at the goals such as peak data rate of 100 Mbps in downlink and 50 Mbps in uplink, throughput increase at the cell boundary, spectral efficiency improvement, and scalable bandwidth [1,2,3]. We propose a novel minimum transmit power-based (MP) packet scheduling algorithm that can achieve power-efficient transmission to the UEs while providing both system throughput gain and fairness improvement. The proposed algorithm is based on the ratio of the transmit power to the number of transmission bits. The proposed MP scheduler allocates the physical resource block (PRB) to the UE that requires the least ratio of the transmit power per bit.
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