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接入网。异构网络的新架构可以为服务提供商带来新的机会，以提高无线网络的服务质量，创造不同的创收选择，并增加业务的灵活性。然而，在跨技术漫游环境中部署应用程序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。在与加拿大贝尔公司的合作中，我们将研究异构无线网络中语音和多媒体流应用的联合速率适应和数据缓冲。速率自适应和数据缓冲的综合考虑，将使可用网络资源得到最优利用，为最终用户提供最优的应用和服务体验。我们将研究这两种方法在未来一代异构无线网络中的动态交互。深入了解它们之间的相互作用将进一步使设计自适应的、联合优化的服务和应用策略成为可能。通过数学分析，计算机模拟和系统实验，我们将生成如何设计和操作未来无线流系统的实用指南，以最佳地平衡服务性能和网络成本之间的权衡。因此，拟议的研究成果有望通过促进技术方法和标准政策来改善服务、降低成本和提高长期竞争力，从而使我们的行业合作伙伴和整个加拿大信息和通信行业受益。

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.