LTE蜂窝网络支持QoS的调度算法.doc


A Scheduling Algorithm for QoS Support in the LTE
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LI Zilong, CHUAI Gang**
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(School of Information & Communication , Beijing University of Posts & munications ,
Beijing 100876)
Abstract: Scheduling is critical to perfomance in the long term evolution(LTE) system. In this paper, a
novel packet scheduling algorithm based on utility function and request activation detection(RAD)
algorithm is proposed and studied. The scheme reduces the resource numbers of high QoS users to
general QoS users by utility function, so that it can provide a higher fairness for users’ throughput and
a small delay for more users. In this paper, the pares throughput, fairness, packet delay
and other aspects with some exiting algorithms. The simulation results show that the proposed scheme
has higher fairness and smaller delay while the cell throughput is stable.
Keywords: Packet scheduling; 3GPP LTE; Utility function; Resource Allocation
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0 Introduction
The third generation partnership project long term evolution (3GPP LTE) system is proposed
as a new radio access technology in order to support high data-rates, increased mobility, low
latency and fairness. And LTE uses single carrier frequency division multiple access (SC-FDMA)
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for the uplink (UL) and orthogonal FDMA for the downlink (DL).
There are many packet scheduling algorithms proposed to sup