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质量控制及投影是高速计算机网络协议研究的重点，也是学术研究、标准化活动和工业应用的热点．本文从分析新型应用通信需求和高速网络传输服务入手，提出涉及应用需求、协议机制和传输服务三个层次的质量控制模型，研究各层的功能特性和相互关系．借助新型快捷运输协议灵活的协议机制，构造合适的质量控制策略，着重研究质量模型在运输层次的投影和划分，特别是运输协议对质量映射、协商和监测的支持．
Quality control and projection are the focus of high-speed computer network protocol research, but also academic research, standardization activities and industrial applications. Starting with the analysis of new application communication requirements and high-speed network transmission services, this paper proposes a quality control model involving three levels of application requirements, protocol mechanisms and transmission services, and studies the functional characteristics and interrelationships of the layers. With the help of flexible protocol mechanism of the new express transport protocol, a suitable quality control strategy is constructed, focusing on the projection and division of the quality model at the transport level, especially the transport protocol’s support for quality mapping, negotiation and monitoring.