Research Article
A Joint Scheduling Scheme for Relay-Involved D2D Communications with Imperfect CSI in Cellular Systems
@INPROCEEDINGS{10.1007/978-3-030-63941-9_2, author={Zhixiang Hu and Zhiliang Qin and Ruofei Ma and Gongliang Liu}, title={A Joint Scheduling Scheme for Relay-Involved D2D Communications with Imperfect CSI in Cellular Systems}, proceedings={6GN for Future Wireless Networks. Third EAI International Conference, 6GN 2020, Tianjin, China, August 15-16, 2020, Proceedings}, proceedings_a={6GN}, year={2021}, month={1}, keywords={Device-to-device (D2D) communication Joint scheduling Imperfect CSI Relay}, doi={10.1007/978-3-030-63941-9_2} }- Zhixiang Hu
Zhiliang Qin
Ruofei Ma
Gongliang Liu
Year: 2021
A Joint Scheduling Scheme for Relay-Involved D2D Communications with Imperfect CSI in Cellular Systems
6GN
Springer
DOI: 10.1007/978-3-030-63941-9_2
Abstract
The introduction of device-to-device (D2D) communication brings many benefits to cellular systems, especially when relay-assisted (RA) D2D modes are included. This paper focuses on the joint scheduling problem when some channel state information (CSI) are not known, involving relay selection, probabilistic access control, power coordination, mode selection, and resource allocation. Since the fading components of the channel appear in the model as random variables in imperfect channels, we make some modifications to access control and channel allocation based on previous works. By using the existing algorithm and corresponding mathematical optimization theories, the transformed integer programming (IP) problem is decomposed into two stages to be solved separately. At the same time, in order to improve the solution efficiency, we transform the original NP-hard problem into a linear programming (LP) problem that can be easily solved. Simulation results validate the performance of the joint scheduling scheme and influence of imperfect CSI from the perspective of cell capacity.
