Voice and Multimedia Streaming over Heterogeneous Wireless Networks Using Rate adaptation and Data Buffering

近年来，新接入技术的快速引入迫使大多数服务提供商运行多个接入网络。异构网络的新架构可以为服务提供商带来新的机会，以提高无线网络服务质量，创建不同的创收选项，并增加服务的灵活性。然而，在跨技术漫游环境中部署应用和服务存在许多挑战，特别是对于实时VoIP流和高速多媒体流。需要对流控制和资源分配进行特殊规定。与加拿大贝尔公司合作，我们将调查到联合速率自适应和数据缓冲的语音和多媒体流应用在异构无线网络。速率适配和数据缓冲的联合考虑将允许可用网络资源的最佳利用，并为终端用户提供最佳的应用和服务体验。我们将研究这两种方法之间的动态互动，在未来的异构无线网络。深入了解它们的交互将进一步实现自适应和联合优化的服务和应用策略的设计。通过数学分析，计算机模拟和系统实验，我们将产生如何设计和操作未来的无线流媒体系统，以最佳的服务性能和网络成本之间的权衡实用的指导方针。因此，拟议的研究结果预计将有利于我们的行业合作伙伴和加拿大信息和通信行业在整个，通过促进技术方法和标准政策，导致服务的改进，降低成本，和长期的竞争力。

The fast introduction of new access technologies in recent years has forced most service providers to run multiple access networks. The new architecture of heterogeneous networks can bring new opportunities to service providers to improve wireless network quality of service, create different revenue-generating options, and increase service flexibility. However, there are many challenges in deploying applications and services over an inter-technology roaming environment, especially for real-time VoIP streaming and high-speed multimedia streaming. Special provisions for streaming control and resource allocation are required. In collaboration with Bell Canada, we will investigate into joint rate adaptation and data buffering for voice and multimedia streaming applications in heterogeneous wireless networks. The joint consideration of rate adaptation and data buffering will allow optimal utilization of the available network resources and provide optimal application and service experience for the end users. We will study the dynamic interaction between these two approaches in future-generation heterogeneous wireless networks. In-depth understanding of their interaction will further enable the design of adaptive and jointly optimized service and application strategies. Through mathematical analysis, computer simulation, and system experimentation, we will generate practical guidelines on how to design and operate future wireless streaming systems, to optimally balance the tradeoff between service performance and networking cost. Thus, the outcomes of the proposed research are expected to benefit both our industry partner and the Canadian information and communication industry at large, by promoting technical methods and standard policies that lead to service improvement, cost reduction, and long-term competitiveness.