NeTS-WN: Collaborative Research: Channel-Aware Distributed Scheduling for Optimal Throughput and Latency: A Unified PHY/MAC Approach

无线ad-hoc网络的设计在无线通信中面临许多独特的挑战，包括1）相邻活动链路之间的同信道干扰，以及2）衰落信道上的时变信道条件。实验数据表明，在许多现实的情况下，衰落效应往往会对MAC层产生不利影响，衰落和MAC的时间尺度之间的耦合要求一个统一的PHY/MAC设计。由于ad hoc通信的分布式性质，很少有工作已经做了开发信道感知，分布式调度吞吐量最大化。实际上没有系统的研究信道感知调度的实时业务下的延迟约束。这个项目的主要目标是填补这一空白，并建立一个理论基础的信道感知，分布式调度在无线ad-hoc网络中，弹性业务和非弹性业务。以开发统一PHY/MAC优化框架为目标，所提出的研究包括三个方面。前两个推力调查分布式机会调度的弹性流量和专注于吞吐量最大化，分别从网络为中心和以用户为中心的角度来看。第三个推力集中在明确的延迟约束下的网络模型，实时流量的信道感知调度。拟议的研究借鉴了调度，随机优化，博弈论和控制理论的基本工具的组合。该项目将为探索ad-hoc通信中信道感知的分布式调度开辟一条新的途径，研究者们期望所提出的工作将最终形成无线adhoc网络的新的基础理论和先进的设计方法，并将对包括无线局域网和无线网状网络在内的许多无线应用产生重大影响。除了技术影响外，拟议研究的更广泛影响还包括教育因素。

The design of wireless ad-hoc networks faces a number of unique challenges in wireless communications including 1) co-channel interference among active links in a neighborhood, and 2) time-varying channel conditions over fading channels. Experimental data reveals that, in many realistic scenarios, fading effects can often adversely affect the MAC layer, and the coupling between the timescales of fading and MAC calls for a unified PHY/MAC design. Due to the distributed nature of ad hoc communications, little work has been done to develop channel-aware, distributed scheduling for throughput maximization. There are virtually no systematic studies on channel-aware scheduling for real-time traffic under latency constraints. A principal goal of this project is to fill this void and build a theoretic foundation for channel-aware, distributed scheduling in wireless ad-hoc networks, for both elastic traffic and inelastic traffic. With the goal of developing a framework for unified PHY/MAC optimization, the proposed research consists of three thrusts. The first two thrusts investigate distributed opportunistic scheduling for elastic traffic and focus on throughput maximization from network-centric and user-centric perspectives, respectively. The third thrust focuses on channel-aware scheduling for network models under explicit delay constraints, for real-time traffic. The proposed research draws on a combination of fundamental tools in scheduling, stochastic optimization, game theory, and control theory. This project will open a new avenue for exploring channel-aware distributed scheduling for ad-hoc communications.The PIs expect that the proposed work will culminate in the formulation of both new fundamental theories and advanced design methodologies for wireless ad hoc networks, and will have a significant impact on many wireless applications including wireless LANs and wireless mesh networks. In addition to the technical impacts, the broader impacts of the proposed research also include educational elements.