Cooperation and cognition in heterogeneous wireless networks

随着无线数据流量的增加，蜂窝网络中有限的带宽资源承受着巨大的压力，工业界和学术界的研究人员都在寻找提高可靠性和吞吐量的方法。这导致了异质网络范式的发展。在异质网络中，无线接入由各种网络拓扑提供，例如微微小区、微微小区和毫微微小区。传统的蜂窝基础设施只能在万不得已的情况下才能接入。关键是使接入点离用户更近，从而节省电力消耗，但更重要的是，在带宽重复使用方面。 尽管异质网络是一个直观的概念，但它提出了许多到目前为止尚未得到解答的实际和理论难题。我们要回答的关键问题是这些网络的共存能力、资源分配和可扩展性。此外，我们计划将一类新网络：移动接入点的使用纳入设计和分析。 到目前为止提到的异类网络是分层的，必须共享有限的可用带宽资源。在可能基于正交频分多址(OFDMA)，特别是长期演进(LTE)类标准的下一代网络的环境中，资源分配包括跨网络分配物理资源块(PRB)和确定传输功率水平。在异质网络中，资源分配问题是一个基本的限制因素，而寻找高效有效的解决方案将是该项目的关键驱动因素。我们将在可伸缩性的背景下研究节点之间的合作、切换和资源分配问题。我们将调查人们对这些问题的认知情况。此外，我们还将调查由于延迟而导致的跨层设计及其对有线回程的影响。

As increased wireless data traffic has placed great strain on the limited bandwidth resources in cellular networks, both industry and academic researchers have searched for means to improve reliability and throughput. This has led to the development of the paradigm of heterogeneous networks. In heterogeneous networks, wireless access is provided by a wide variety of network topologies such as micro-, pico- and femto-cells. The traditional cellular infrastructure is accessed only as a last resort. The key is to bring the access point close to the user, leading to savings in power used, but more importantly, in bandwidth reuse. While an intuitive concept, heterogeneous networks raise many difficult practical and theoretical questions that have, so far, been unanswered. Key questions that we aim to answer are the ability of these networks to co-exist, resource allocation and scalability. In addition, we plan to bring into the design and analysis the use of a new class of networks: mobile access points. The heterogeneous networks mentioned so far are hierarchical and must share the limited bandwidth resources available. In the context of the next-generation of networks, likely based on orthogonal frequency division multiple access (OFDMA) - especially, the Long Term Evolution (LTE) class of standards, resource allocation includes both allocating physical resource blocks (PRBs) across networks and determining transmission power levels. The resource allocation problem is a fundamental limiting factor in heterogeneous networks and finding efficient and effective solutions will be a key driver in this project. We will investigate issues of cooperation amongst nodes, handoffs and resource allocation in the context of scalability. We will investigate cognition to address these issues. Furthermore, we will investigate cross-layer designs due to latency and the impact on the wired backhaul.