NGS: QoS Assurance of Next Generation Network (NGN) Applications

下一代网络（NGN）应用必须在由电路、分组、无线和有线网络的组合组成的综合网络上无缝地操作。下一代网络应用所提供的服务在我们的日常生活中扮演重要的角色，因此保证这些服务的质素是必不可少的。在该提议中，术语QoS是指用户感知的服务质量。这一概念不同于传统的QoS概念，传统的QoS指的是诸如流经网络的分组业务的延迟和抖动之类的性能参数。在该提议中，术语QoS因此可以指诸如服务的响应时间、可靠性和可用性的参数。本项目的重点是为NGN应用开发一种QoS保证方法。该项目将开发QoS提供和监控技术。QoS供应与资源分配和中间件配置有关，以便满足服务的QoS期望。QoS监控涉及测量用户所体验的服务的实际QoS。尽管提供，NGN服务的用户可能会遇到QoS下降，由于这些服务上发起的恶意攻击的对手。NGN服务必须能够抵御这些攻击，并继续为其用户提供相同级别的QoS。为了能够抵御这些攻击，必须及时发现它们，以限制这些攻击造成的损害。因此，QoS保证方法还将涉及检测此类攻击的技术的开发。 服务质量保证方法将以服务和应用程序级数据的收集、汇总和分析为基础。

A Next Generation Network (NGN) application must operate seamlessly across an integrated network consisting of a combination of circuit, packet, wireless and wireline networks. Services provided by NGN applications will play a crucial role in our day to day lives and hence assurance of the quality of these services is essential. In this proposal the term QoS refers to the quality of a service as perceived by a user. This notion is unlike the traditional notion of QoS which refers to the performance parameters such as delay and jitter of the packet traffic flowing through the network. In this proposal the term QoS may thus refer to parameters such as response time, reliability and availability of a service. Development of a QoS assurance methodology for NGN applications is the focus of this project. The project will develop techniques for both QoS provisioning as well as monitoring. QoS provisioning is concerned with resource allocation and middleware configuration such that the QoS expectations of a service are met. QoS monitoring is concerned with measuring the actual QoS of a service as experienced by a user. Despite provisioning, users of NGN services may experience QoS degradation due to malicious attacks launched on these services by adversaries. NGN services must be able to withstand these attacks and continue to offer the same level of QoS to its users. In order to be able to withstand these attacks, they must be detected in a timely fashion so as to limit the damage caused by these attacks. Hence the QoS assurance methodology will also involve the development of techniques to detect such attacks. The QoS assurance methodology will be based on the collection, aggregation and analysis of service and application level data.