Cooperative Communications and Networking: Coordinated Base Station Access, Secure Relay-based Cooperation, Cooperative Cognitive Radio Networks

建议的研究将调查合作通信和网络(i)协调一组基站以提供多小区合作，以扩大单个隔离小区的容量，并减轻无线蜂窝网络中的小区间干扰；（ii）通过合作中继和分集传输/接收增强目的接收器的信号接收。同时通过引入技术来减轻有意和无意的对手，例如恶意节点和窃听者，确保安全通信，以及（iii）在认知无线电网络中实现合作频谱接入，以实现频谱和能源效率，同时满足许可用户或主要用户（pu）的要求。信号源（发送方）与第三方作为合作伙伴中继其信号的根本原因是，从信号源到目的地的直接链路的质量可能非常差，例如，要么被直接路径上的障碍物阻塞，要么被无线信道固有的损伤减弱。

The proposed research will investigate into cooperative communications and networking (i) to coordinate a cluster of base stations to provide multi-cell cooperation so as to expand the capacity of a single isolated cell and mitigate inter-cell interference in wireless cellular networks, (ii) to enhance signal reception at the destination receiver through cooperative relaying and diversity transmission/reception, while ensuring secure communication by introducing techniques to mitigate intentional and unintentional adversaries, e.g., malicious nodes and eavesdroppers, and (iii) to effect cooperative spectrum access in cognitive radio networks to achieve spectrum and energy efficiencies while satisfying the requirements of licensed or primary users (PUs). The fundamental reason for a source (sender) to engage a third party as partner(s) to relay its signal is because the quality of the direct link from source to destination may be very poor, e.g., either blocked by obstacles in the direct path or faded by impairments inherent in the wireless channel. The long term objective is to develop new and in-depth knowledge towards the construction of a flexible and robust cross-domain information transport platform for handling multimedia services in fixed and mobile environments to facilitate secure end-to-end information transfer in large volumes with QoS provisioning. As building blocks to fulfill the long-term objective, the short term objectives are (i) to investigate techniques in multi-cell cooperative communications that can exploit inter-cell interferences so that each cell in the coordinated cluster has the same per-cell capacity as a single isolated cell, (ii) to propose efficient power control and resource allocation strategies and develop efficient algorithms for implementation of power allocation schemes, (iii) to seek efficient methods for cooperative spectrum access that are spectrum efficient and energy efficient, and (iv) to develop end-to-end control algorithms and secure transmission schemes for information delivery across wireless mesh networks.