scholarly journals On the energy efficiency of rate and transmission power control in 802.11

2018 ◽  
Vol 117 ◽  
pp. 164-174 ◽  
Author(s):  
Iñaki Ucar ◽  
Carlos Donato ◽  
Pablo Serrano ◽  
Andres Garcia-Saavedra ◽  
Arturo Azcorra ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Power Control ◽  
Transmission Power ◽  
Transmission Power Control

scholarly journals A Joint Strategy for Fair and Efficient Energy Usage in WLANs in the Presence of Capture Effect

Electronics ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 386
Author(s):  
Bilal Khan ◽  
Rana Rehman ◽  
Byung-Seo Kim
Keyword(s):  
Energy Efficiency ◽  
Power Control ◽  
Access Point ◽  
Local Area ◽  
Contention Window ◽  
Transmission Power ◽  
Capture Effect ◽  
Analysis Model ◽  
Transmission Power Control ◽  
Joint Strategy

Capture effect has been shown as a physical layer (PHY) phenomenon of modern wireless devices that improves the performance of wireless local area networks (WLANs) in terms of throughput. In this paper, however, we explore the effect of PHY capture in the domain of energy efficiency. Analysis model that takes into account the effect of PHY capture is backed up by ns-2 simulations show that capture effect improves energy efficiency of WLAN by 20%. This improvement, however, results in unfairness, i.e, a group of nodes located far away from the Access Point (AP) is three times less energy efficient than the group of nodes located closer to the AP. To resolve the unfairness caused by the capture effect, furthermore, this paper proposes a joint strategy of adaptive transmission power control (ATXPR) and contention window adjustment (CWADJ). Namely, a node that suffers transmission failure due to another node capturing the channel steps up its transmission power according to the transmission power control algorithm and refrains from increasing its contention window according to contention window adjustment mechanism, respectively. Our proposed joint strategy is 99% fair while maintaining overall energy efficiency of the network.

Dynamic Transmission Power Control Mechanism for Maximizing Energy Efficiency of WLAN

2013 ◽  
Vol 734-737 ◽  
pp. 1737-1742
Author(s):  
Gan Ding ◽  
Dong Liang ◽  
Wen Bo Wang ◽  
Shu Long Liu
Keyword(s):  
Energy Efficiency ◽  
Power Control ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Base Station ◽  
System Level ◽  
Area Network ◽  
Transmission Power ◽  
Mobile Nodes ◽  
Transmission Power Control

Energy efficiency is not fully considered as the key factor compared with coverage and interference in the conventional wireless local area network (WLAN) deployment phase in the past. However, energy consumption is increasing exponentially with the heavy growing number of mobile nodes (MN). As a result, excessive use of energy is becoming a serious problem even a disaster in multi-base-station WLAN. In this paper, a mechanism of transmission power configuration in WLAN deployment and dynamic transmission power control during WLAN running phase is proposed focusing on the energy efficiency and coverage. The performance of the mechanism has been experimentally evaluated at the system level and system-wide power usage on the demonstration testbed.

Sign in / Sign up

Export Citation Format

Share Document