Name
Title | ||
|---|---|---|
Optimization for Signal Transmission and Reception in a Macrocell of Heterogeneous Uplinks and Downlinks |
Abstract | ||
|---|---|---|
Internet-of-things (IoT) applications continue to drive advancements in serving as many heterogeneous low-latency downlinks and uplinks as possible within a constrained communication bandwidth. Full-duplexing (FD) transceivers have been introduced to implement simultaneous signal transmission and reception (STR) over the entire available frequency band. However, both inter-link interference and FD loop-interference are hardly suppressed to a necessary level for the effectiveness of FD-based STR even for microcells. This paper proposes an alternative STR technique per one time-slot for macrocells, where a fraction of a time-slot is used for downlinks and the remaining complementary fraction of the time-slot is used for uplinks. Thus, STR over the entire available bandwidth can be implemented in a way with no loop interference. Furthermore, another approach of using a fraction of the available bandwidth for downlinks and the remaining complementary fraction of the bandwidth for uplinks over the whole time-slot is also proposed. The problem of both downlink and uplink beamforming to maximize the energy efficiency of such heterogeneous networks subject to the quality-of-service in terms of downlink and uplink throughput is examined for all three possible STRs. Numerical results demonstrate the advantages of the time-fraction-wise STR and bandwidth-fraction-wise STR over the FD-based STR, where the time-fraction-wise STR is not only the best in serving the same numbers of downlinks and uplinks but also is capable of serving many more downlinks and uplinks with a higher energy efficiency. |
Year | DOI | Venue |
|---|---|---|
2020 | 10.1109/TCOMM.2020.3014945 | IEEE Transactions on Communications |
Keywords | DocType | Volume |
Heterogeneous networks,signal transmission and reception,energy efficiency,fractional time-slot allocation,fractional bandwidth allocation,downlink and uplink beamforming,nonconvex optimization | Journal | 68 |
Issue | ISSN | Citations |
11 | 0090-6778 | 1 |
PageRank | References | Authors |
0.35 | 0 | 5 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Yu Yu | 1 | 69 | 19.95 |
| Hoang D. Tuan | 2 | 1936 | 191.03 |
| Trung Q. Duong | 3 | 2911 | 171.22 |
| H. V. Poor | 4 | 25411 | 1951.66 |
| Yong Fang | 5 | 191 | 31.43 |