Link layer transmission techniques for multiple input multiple output MIMO-based future wireless networks

多输入多输出（MIMO）技术通过使用多个发射和接收天线提供高频谱效率，已被广泛认为是下一代无线网络的首选技术。迄今为止，MIMO的研究项目主要集中在物理传输和编码技术上，而MIMO系统的新空间范式可以用于提高更高层次（层）的性能。缺乏适合与MIMO编码技术有效使用的更高层算法被认为是无线网络中MIMO实现的限制。MIMO引入的新的资源空间维度为重新设计单用户和多用户无线系统的链路级传输技术带来了新的挑战。在本研究计划中，将研究理论性能界限，并开发适用于下一代MIMO无线网络的新链路控制协议和多址访问机制。更具体地说，将探讨(i)错误控制，（ii）媒介访问控制，（iii）资源分配和（iv）调度与呼叫准入控制和服务质量（QoS）保证提供的功能。针对不同的MIMO物理编码技术，将提出并通过分析和仿真评估旨在优化帧（链路级数据单元）级性能的新的跨层信道感知qos传输算法。本文还将进行分集-复用权衡的理论研究，以考虑单用户ARQ重传系统和多用户系统在多用户分集影响下的传输延迟。该计划将更好地理解MIMO技术在更高层次的影响，并将提出理论和实际的链路控制解决方案，以提高整体系统性能。因此，它有助于解决在无线网络中实现MIMO技术的工业问题。由此产生的知识产权将转移给加拿大工业，并帮助他们在商用MIMO无线网络产品的开发中处于领先地位。

It is widely accepted that Multiple Input Multiple Output (MIMO) is a technology of choice for next generation wireless networks as it provides high spectral efficiency by using multiple transmit and receive antennas. To date, MIMO research projects mainly focus on physical transmission and coding techniques while the new spatial paradigm of MIMO systems can be exploited to improve the performances at higher levels (layers). The lack of higher layers algorithms adapted to be efficiently used with MIMO coding techniques is considered a limitation on the implementation of MIMO in wireless networks. The new spatial dimension of resources introduced by MIMO creates new challenges for re-designing the link level transmission techniques for single-user and multi-user wireless systems. In this research program, theoretical performance bounds will be investigated and new link control protocols and multiple access mechanisms applicable to next generation MIMO wireless networks will be developed. More specifically, the functionalities of (i) error control, (ii) medium access control, (iii) resource allocations, and (iv) scheduling with call admission control and Quality of Service (QoS) guarantees providing will be explored. New cross-layer channel-aware QoS-based transmission algorithms that aim to optimize the frame (link level data unit) level performances will be proposed and evaluated, analytically and by simulations, for different MIMO physical coding techniques. The theoretical study of diversity-multiplexing trade-off will be also performed to consider the transmission delay in the context of ARQ retransmission system for single-user as well as for multi-user systems with the impact of multi-user diversity. This program will give better understanding of the impact of MIMO technology at the higher layers and will propose theoretical and practical link control solutions to improve the global system performances. Thus, it contributes to resolve the industrial problem of implementing MIMO technology in wireless networks. The resulting intellectual property will be transferred to Canadian industries and helping them to be at the front position for the development of commercial MIMO wireless networks products.