NeTS: Medium: Collaborative Research: Coexistence of Heterogeneous Wireless Access Technologies in the 5 GHz Bands

随着每年数十亿的无线设备（如智能手机和平板电脑）进入市场，无线频谱成为稀缺资源。该项目旨在通过开发能够有效利用无线频谱的新技术来解决这一重要问题。由于Wi-Fi的激增，2.4GHz无线频带中的未授权频谱已经被无线流量饱和。因此，Wi-Fi行业和蜂窝利益相关者（如高通公司）对使用5 GHz无线频段非常感兴趣。在这个项目中，PI将开发创新技术，使不同的无线技术在5 GHz频段之间实现和谐的频谱共享。示例无线技术包括Wi-Fi、非授权LTE（LTE-U）和专用短程通信（DSRC）。DSRC是一种专为汽车使用而设计的短程到中程无线通信技术。该项目的成果将允许更有效地利用无线频谱，这意味着支持更多新的无线应用和服务，更快的速度和更好的质量。预计这项工作将对当今和未来的无线技术产生重大影响。该项目的研究结果预计将包括基本的贡献，将提供深入了解其他无线研究。透过业界和政府的外展活动，项目小组将确保项目的研究结果对业界正在进行的研究/发展工作，以及对政府开放更多频谱供频谱共用的措施，产生最大的影响。项目成果将纳入这三个机构目前提供的本科生和研究生课程。拟议的工作提供了很好的动手练习，研究和教育机会，本科生和研究生在三个合作机构。在异构无线技术之间实现和谐的频谱共享是一个具有挑战性的问题，但是为了平息现有的以及新兴的无线应用对更多频谱的爆炸性需求，迫切需要解决这个问题。这个问题的重要性对于5GHz频带尤其严重，因为这些频带已经成为用于启动新的无线应用和服务的最令人垂涎的频带。 对5 GHz频段频谱的访问已成为LTE-U、Wi-Fi和专用短程通信（DSRC）利益相关者之间的主要争论焦点。 更重要的是，5 GHz频段已经成为证明三种异构技术之间频谱共享可行性的试验场，LTE-U、Wi-Fi（802.11ac/802.11ax）和DSRC。 认识到这个问题的重要性，项目团队建议开始深入研究，重点关注两种特定的共存场景：（1）LTE-U和Wi-Fi之间的共存;（2）DSRC和Wi-Fi之间的共存。 关于Wi-Fi和LTE-U共存的拟议工作预计将对当今和未来的技术产生切实影响。PI将研究利用未来技术（如802.11ax）中设想的高级功能的前卫方法，以及可应用于当今技术的向后兼容技术（例如，LTE-U，802.11ac）。 DSRC-Wi-Fi共存的拟议工作将是第一个系统的研究，调查现任保护技术设计的高度移动的现任用户是非常敏感的通信延迟。

As billions of wireless devices (such as smartphones and tablets) are introduced into the market each year, wireless spectrum becomes a scarce resource. This project aims to address this important problem by developing novel technologies that enable efficient utilization of wireless spectrum. Due to the proliferation of Wi-Fi, the unlicensed spectrum in the 2.4 GHz wireless band has been saturated with wireless traffic. Hence, there has been a lot of interest from the Wi-Fi industry and the cellular stakeholders (such as Qualcomm) to use the 5 GHz wireless bands. In this project, the PIs will develop innovative technologies that will enable harmonious spectrum sharing among different wireless technologies in the 5 GHz bands. The example wireless technologies include Wi-Fi, Unlicensed LTE (LTE-U), and Dedicated Short-Range Communications (DSRC). DSRC is a short-range to medium-range wireless communication technology designed for automotive use. The outcome of this project will allow much more efficient utilization of wireless spectrum, which means supporting more new wireless applications and services, faster speed and better quality. The proposed work is expected to have significant impacts on today's and future wireless technologies. The project findings are expected to include fundamental contributions that would provide insights into other wireless research. Through industry and government outreach activities, the project team will ensure that the project findings have maximum impacts on ongoing industry research/development efforts as well as on Government initiatives to open up more spectrum for spectrum sharing. The project outcomes will be incorporated into undergraduate and graduate courses currently offered at the three institutions. The proposed work provides excellent hands-on exercises, research, and educational opportunities for undergraduate and graduate students at the three collaborating institutions. Enabling harmonious spectrum sharing between heterogeneous wireless technologies is a challenging problem, but one that needs to be urgently addressed in order to quell the exploding demand for more spectrum by existing as well as burgeoning wireless applications. The importance of this problem is especially acute for the 5 GHz bands because these bands have emerged as the most coveted bands for launching new wireless applications and services. Access to spectrum in the 5 GHz bands has emerged as a major bone of contention between the LTE-U, Wi-Fi, and Dedicated Short-Range Communications (DSRC) stakeholders. More importantly, the 5 GHz bands have become a proving ground for demonstrating the viability of spectrum sharing between three heterogeneous technologies-viz., LTE-U, Wi-Fi (802.11ac/802.11ax), and DSRC. Recognizing the importance of this problem, the project team proposes to embark on an in-depth study that focuses on two particular coexistence scenarios: (1) coexistence between LTE-U and Wi-Fi and (2) coexistence between DSRC and Wi-Fi. The proposed work on the coexistence of Wi-Fi and LTE-U is expected to have tangible impacts on today's technologies as well as those of the future. The PIs will study avant-garde approaches that exploit the advanced functionalities envisioned in future technologies, such as 802.11ax, as well as backward-compatible techniques that can be applied to today's technologies (e.g., LTE-U, 802.11ac). The proposed work on DSRC-Wi-Fi coexistence will be one of the first systematic studies that investigate incumbent protection techniques designed for highly mobile incumbent users that are very sensitive to communication latency.