Abstract
In order to improve the uplink performance of future cellular networks, the idea to decouple the downlink (DL) and uplink (UL) association has recently been shown to provide significant gain in terms of both coverage and rate performance. However, all the works are limited to a single input single output (SISO) network. Therefore, to study the gain provided by the DL and UL decoupling in multi-antenna base stations (BSs) setup, we study a two tier heterogeneous network consisting of multi-antenna BSs, and single antenna user equipments (UEs). We use maximal ratio combining (MRC) as a linear receiver at the BSs and tools from stochastic geometry, and we derive tractable expressions for both signal-to-interference ratio (SIR) coverage probability and rate coverage probability. We observe that as the disparity in the beamforming gain of both tiers increases, the gain in terms of SIR coverage probability provided by the decoupled association over non-decoupled association decreases. We further observe that when there is asymmetry in the number of antennas of both tiers, then we need further biasing toward femto-tier on the top of decoupled association to balance the load and get optimal rate coverage probability.
| Original language | English |
|---|---|
| Article number | 7880671 |
| Pages (from-to) | 2760-2775 |
| Number of pages | 16 |
| Journal | IEEE Transactions on Wireless Communications |
| Volume | 16 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2017 May 1 |
| Externally published | Yes |
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Keywords
- heterogeneous networks
- maximal ratio combining
- multiple antennas
- Stochastic geometry
- uplink analysis
ASJC Scopus subject areas
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Cite this
Downlink and Uplink Decoupling in Two-Tier Heterogeneous Networks with Multi- Antenna Base Stations. / Bacha, Mudasar; Wu, Yueping; Clercks, Bruno.
In: IEEE Transactions on Wireless Communications, Vol. 16, No. 5, 7880671, 01.05.2017, p. 2760-2775.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Downlink and Uplink Decoupling in Two-Tier Heterogeneous Networks with Multi- Antenna Base Stations
AU - Bacha, Mudasar
AU - Wu, Yueping
AU - Clercks, Bruno
PY - 2017/5/1
Y1 - 2017/5/1
N2 - In order to improve the uplink performance of future cellular networks, the idea to decouple the downlink (DL) and uplink (UL) association has recently been shown to provide significant gain in terms of both coverage and rate performance. However, all the works are limited to a single input single output (SISO) network. Therefore, to study the gain provided by the DL and UL decoupling in multi-antenna base stations (BSs) setup, we study a two tier heterogeneous network consisting of multi-antenna BSs, and single antenna user equipments (UEs). We use maximal ratio combining (MRC) as a linear receiver at the BSs and tools from stochastic geometry, and we derive tractable expressions for both signal-to-interference ratio (SIR) coverage probability and rate coverage probability. We observe that as the disparity in the beamforming gain of both tiers increases, the gain in terms of SIR coverage probability provided by the decoupled association over non-decoupled association decreases. We further observe that when there is asymmetry in the number of antennas of both tiers, then we need further biasing toward femto-tier on the top of decoupled association to balance the load and get optimal rate coverage probability.
AB - In order to improve the uplink performance of future cellular networks, the idea to decouple the downlink (DL) and uplink (UL) association has recently been shown to provide significant gain in terms of both coverage and rate performance. However, all the works are limited to a single input single output (SISO) network. Therefore, to study the gain provided by the DL and UL decoupling in multi-antenna base stations (BSs) setup, we study a two tier heterogeneous network consisting of multi-antenna BSs, and single antenna user equipments (UEs). We use maximal ratio combining (MRC) as a linear receiver at the BSs and tools from stochastic geometry, and we derive tractable expressions for both signal-to-interference ratio (SIR) coverage probability and rate coverage probability. We observe that as the disparity in the beamforming gain of both tiers increases, the gain in terms of SIR coverage probability provided by the decoupled association over non-decoupled association decreases. We further observe that when there is asymmetry in the number of antennas of both tiers, then we need further biasing toward femto-tier on the top of decoupled association to balance the load and get optimal rate coverage probability.
KW - heterogeneous networks
KW - maximal ratio combining
KW - multiple antennas
KW - Stochastic geometry
KW - uplink analysis
UR - http://www.scopus.com/inward/record.url?scp=85028718255&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85028718255&partnerID=8YFLogxK
U2 - 10.1109/TWC.2017.2665466
DO - 10.1109/TWC.2017.2665466
M3 - Article
AN - SCOPUS:85028718255
VL - 16
SP - 2760
EP - 2775
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
SN - 1536-1276
IS - 5
M1 - 7880671
ER -