CAREER: Study of Coexistence Restrictions of Cross-layer Designs in Wireless Networks

针对无线网络提出的跨层设计呈爆炸式增长。这些设计打破了分层结构，积极利用无线网络中协议层之间的依赖性。然而，大量的跨层设计产生了严重的共存问题。分层结构的违反可能不符合约束许多跨层设计和其他网络系统之间的共存的限制，从而导致显著的问题，例如性能下降、不一致的分布式决策、网络分区和不稳定性。本计画的目标是系统且严谨地分类与分析无线网路中跨层设计的共存限制。 在这个项目中，各种跨层设计的共存限制进行了理论建模和分析。定义了不同类型的共存限制，揭示了它们发生的条件及其对网络操作的影响，并开发了检查共存问题的方法。该项目还寻求符合限制的协议设计技术。该项目是理解无线网络中跨层设计的主要努力，也是系统分析跨层设计共存限制的先驱。这个项目的结果可以用来评估跨层设计？局限性和潜在问题。这将促进良好的跨层设计在真实的系统中的接受，并防止设计集成中的架构失败。此外，该项目提供了设计更兼容的跨层系统的实用技术。最终，这将大大增强当前和未来无线网络系统的灵活性和鲁棒性。

There has been an explosive growth of cross-layer designs proposed for wireless networks. These designs break the layered structure to actively exploit the dependence between protocol layers in wireless networks. However, the large number of cross-layer designs creates serious coexistence issues. The violation of layered structure may not comply with restrictions that constrain the coexistence among many cross-layer designs and other network systems, causing significant issues, such as degraded performance, inconsistent distributed decision making, network partition, and instability. The objective of this project is to systematically and rigorously categorize and analyze coexistence restrictions of cross-layer designs in wireless networks. In this project, coexistence restrictions of various cross-layer designs are theoretically modeled and analyzed. Different kinds of coexistence restrictions are defined, the conditions for their occurrences and their impact on network operations are revealed, and methods to check coexistence issues are developed. The project also seeks restriction-compliant protocol design techniques. This project serves as a major effort in the understandings of cross-layer designs in wireless networks and is the pioneer in providing systematic analysis of coexistence restrictions of cross-layer designs. The result of this project can be used to evaluate cross-layer designs? limitations and potential problems. This will promote the acceptance of good cross-layer designs in real systems and prevent architecture failures in design integration. In addition, this project provides practical techniques for designing more compatible cross-layer systems. Ultimately, this will greatly enhance the flexibility and robustness of current and future wireless network systems.