Dynamic UL/DL Mode Selection and Resource Allocation in Multi-Cell MIMO TDD Systems

This paper considers joint uplink/downlink mode selection and resource allocation problem in multi-cell systems for flexible TDD frame structures. To combat the difficult interference characteristics of such systems, a dynamic mode selection and resource allocation scheme is derived using Lyapunov optimization. The result is a cross-layer optimization scheme, where a long-term time-average utility function of flow rates and interference penalty is optimized by solving a series of instantaneous subproblems. The proposed dynamic algorithm provides a solution for the UL/DL mode selection and resource allocation, guided by the accumulating network layer queues and virtual queues. Furthermore, a heuristic method is considered to decouple the difficult power constraint in the resource allocation subproblem.

Arvola Antti, Joshi Satya, Tölli Antti

A4 Article in conference proceedings

2019 53rd Asilomar Conference on Signals, Systems, and Computers Nov 3-6, 2019 Pacific Grove, CA, USA

A. Arvola, S. Joshi and A. Tölli, "Dynamic UL/DL Mode Selection and Resource Allocation in Multi-Cell MIMO TDD Systems," 2019 53rd Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, USA, 2019, pp. 1936-1940, doi: 10.1109/IEEECONF44664.2019.9048674

https://doi.org/10.1109/IEEECONF44664.2019.9048674 http://urn.fi/urn:nbn:fi-fe2020052639137