Power interference modeling for CSMA/CA based networks using directional antenna

Abstract

In IEEE 802.11 based wireless networks adding more access points does not always guarantee an increase of network capacity. In some cases, additional access points may contribute to degrade the aggregated network throughput as more interference is introduced. This paper characterizes the power interference in CSMA/CA based networks consisting of nodes using directional antenna. The severity of the interference is quantized via an improved form of the Attacking Case metric as the original form of this metric was developed for nodes using omnidirectional antenna.The proposed metric is attractive because it considers nodes using directional or omnidirectional antenna, and it enables the quantization of interference in wireless networks using multiple transmission power schemes. The improved Attacking Case metric is useful to study the aggregated throughput of IEEE 802.11 based networks; reducing Attacking Case probably results in an increase of aggregated throughput. This reduction can be implemented using strategies such as directional antenna, transmit power control, or both.

Predicting throughput in IEEE 802.11 based wireless networks using directional antenna

“…We have extended the attacking case in [13] to cater for nodes using DA. The improved attacking case metric introduced may be used in nodes using OA or DA.…”

“…This section provides an overview of the improved attacking case metric that is proposed in [13]. The metric is used to quantize the severity of interference in IEEE 802.11 (CSMA/CA) based wireless network.…”

“…The metric is used to quantize the severity of interference in IEEE 802.11 (CSMA/CA) based wireless network. Interested readers are suggested to read [13] for further details on this metric. This metric addresses the IEEE 802.11 based wireless networks with nodes using both OAs and DAs.…”

“…This paper aims to study the relationship between the improved attacking case metric which we proposed in [13] and throughput for WLAN with nodes using DA. Through regression analysis the relationship between the two variables is studied.…”

“…As in [13], the wireless video surveillance network (refer Fig. 1) is considered the basic scenario of our study.…”