Resource allocation and cross-layer optimization in wireless networks

无线技术多年来取得了巨大的成功，并且无线网络由于其快速且廉价的部署以及其提供灵活且无处不在的互联网接入的能力而现在变得越来越流行。虽然大多数现有的无线网络仍然仅限于单跳接入，但这些网络能够通过多跳无线路径转发分组，这使得它们能够轻松地扩展覆盖区域。这种便利性使得IEEE 802.11从个人家庭发展到覆盖中型到大型企业、公寓大楼和住宅开发以及公共区域热点（例如，机场、高速公路休息区、咖啡店等）。随着越来越多的用户依赖这些网络作为其互联网接入的主要来源，人们越来越期望这些网络应该提供可靠和高的端到端吞吐量。不幸的是，由于诸如由来自并发传输的干扰引起的有损无线链路之类的因素，内，由沿着单个路径的连续沿着跳传输引起的路径干扰。所提出的工作将提供对多跳和无线网状网络的能力和限制的基本理解，并将提出通过改进来提高其容量的解决方案。频谱空间复用和使用智能天线。因此，我们将开发具有强大理论基础的实用算法，这将实现多跳和无线网状网络，为提供可靠的无线接入互联网至关重要的显着性能改善。

Wireless technologies have seen tremendous success over the years and wireless networks have now become increasingly popular due to their fast and inexpensive deployment and their capabilities of providing flexible and ubiquitous Internet access. While the majority of existing wireless networks are still exclusively confined to single hop access, it is the ability of these networks to forward packets over multihop wireless paths which enabled them to easily extend the coverage area. This convenience has led the IEEE 802.11 to emerge from individual homes to large scale deployments in environments covering medium to large enterprises, apartment complexes and housing developments, as well as public area hot spots (e.g., airports, highway rest areas, coffee shops, etc.). As more users depend on such networks as their primary source for Internet access, there is an increasing expectation that these networks should provide reliable and high end-to-end throughput. Unfortunately, achieving good multihop throughput has been challenging due to factors, such as lossy wireless links caused by interference from concurrent transmissions, and intra-path interference caused by transmissions on successive hops along a single path. The proposed work will provide a fundamental understanding of the capabilities and limitations of multihop and wireless mesh networks and will present solutions to improving their capacity through improving the spectrum spatial reuse and using smart antennas. We will therefore develop practical algorithms with strong theoretical foundation which will achieve significant performance improvements for multihop and wireless mesh networks that are essential for providing reliable wireless access to the Internet.