Can Scheduling with Error Rate Consideration Support TCP Performance Comparable to Packet Combining HARQ in Evolved UTRA and UTRAN Networks?

Yan Zhang, M. Uchida, M. Tsuru, Y. Oie
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引用次数: 2

Abstract

As a key technology of evolved UTRA and UTRAN, hybrid ARQ with packet combining (HARQ with PC) can effectively improve the throughput performance for poor channel condition users without doing unacceptable level of harm to the system transmission efficiency or the throughput performance of good condition users. In the present study, we attempt to apply scheduling with error rate consideration as an alternative method by which to realize a comparable TCP performance to HARQ with PC. Scheduling with error rate consideration introduces the transmission failure possibility (error rate) in order to modify the existing channel-aware scheduling schemes to avoid high-risk transmissions, and thus improves TCP performance. Simulations show that scheduling with error rate consideration can realize a TCP performance comparable to HARQ with PC when no user continuously experiences a nearly zero successful transmission possibility environment. Moreover, it is shown herein that a synergistic improvement can be achieved by applying scheduling with error rate consideration to HARQ with PC
在改进的UTRA和UTRAN网络中,考虑错误率的调度是否能支持TCP性能与分组组合HARQ相当?
作为UTRA和UTRAN演进的一项关键技术,混合ARQ加分组组合(HARQ + PC)可以有效地提高信道条件较差用户的吞吐量性能,而不会对系统传输效率和信道条件较好的用户的吞吐量性能造成不可接受的损害。在本研究中,我们尝试将考虑错误率的调度作为一种替代方法,通过该方法可以实现与PC HARQ相当的TCP性能。考虑错误率调度引入传输失败的可能性(错误率),以修改现有的通道感知调度方案,避免高风险传输,从而提高TCP性能。仿真结果表明,当没有用户连续经历几乎为零的成功传输可能性环境时,考虑错误率的调度可以实现与PC的HARQ相当的TCP性能。此外,本文还表明,将考虑错误率的调度应用于具有PC的HARQ可以实现协同改进
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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