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LTE可以提供真正无处不在基于IP的移动宽带业务,但随着承载网的IP化,网络拥塞、丢包、抖动、延时等质量问题将影响到LTE业务层的QoS质量.作为LTE无线资源管理的核心,研究并设计一个良好的资源调度算法是提高数据业务的性能和终端用户的体验是一个亟待解决的重要任务.本文通过借鉴LTE对VoIP数据分组的半持续调度算法的思想,提出了一种LTE的无线资源调度的改进方案.方案将TCP确认包映射到具有更高优先级的空闲逻辑信道,从而降低了ACK包在无线信道中发生丢弃和拥塞的概率,避免了TCP拥塞控制机制的频繁开启.仿真结果表明,本文提出的TCP确认包映射转换方案在RTT时延、吞吐量等方面均有一定的提升,具有一定的稳定性和性能优势.
LTE can provide truly ubiquitous IP-based mobile broadband services, but with the IP of the bearer network, quality problems such as network congestion, packet loss, jitter and delay will affect QoS quality of the LTE service layer.As LTE radio resources Management of the core, to study and design a good resource scheduling algorithm is to improve the performance of data services and end-user experience is an important task to be solved.This paper by drawing lessons from LTE semi-persistent scheduling algorithm of VoIP data packet idea, put forward An improved scheme of radio resource scheduling for LTE is proposed in the scheme, which maps a TCP acknowledgment packet to an idle logical channel with a higher priority so as to reduce the probability that an ACK packet discards and congestions in a radio channel, and avoids a TCP congestion control mechanism The simulation results show that the TCP ACK packet translation scheme proposed in this paper has a certain degree of improvement in terms of RTT delay and throughput and has certain stability and performance advantages.