Abstract
The main contribution of this work is the proposal and assessment of the MU-MIMO across Small Cells concept. MU-MIMO is the spatial multiplexing of multiple users on a single time-frequency resource. In small cell networks, where the number of users per cell is low, finding suitable sets of users to be co-scheduled for MU-MIMO is not always possible. In these cases we propose MU-MIMO-based cell reassignments of users into adjacent cells to enable MU-MIMO operation. From system level simulations we found that, when the initial number of users per small cell is four, cell reassignment results in a 21.7% increase in the spectral efficiency gain attributed to MU-MIMO, and a higher percentage increase when the initial number of users per cell is lower. Going forward, we will extend this work to also consider energy savings through switching off small cells which are emptied by the reassignment process.
| Original language | English |
|---|---|
| Title of host publication | 2014 IEEE International Conference on Communications (ICC) |
| Pages | 5318-5324 |
| Number of pages | 7 |
| DOIs | |
| Publication status | Published - 1 Jun 2014 |
Keywords
- MIMO communication
- space division multiplexing
- multiuser MIMO across small cells
- spatial multiplexing
- single time frequency resource
- adjacent cells
- MU-MIMO operation
- Interference
- MIMO
- Signal to noise ratio
- Receiving antennas
- Transmitting antennas
- Wideband
- MU-MIMO
- small cells
- inter-cell coordination
- LTE