Ad hoc WLAN throughput improvement by reduction of RTS range

Weyulu, Emilia; Taro, Iwabuchi; Misu, Takeshi; Hanada, Masaki; Kim, Moo Wan

doi:10.23919/icact.2017.7890092

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Exposed Node Problem1

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“…In previous publications, we presented results for simulations based on an XY plane for grid and random distribution topologies [8]. In this paper, we introduce simulation results for an ad hoc WLAN deployed in an office building that represents an XYZ three-dimensional plane.…”

Section: Exposed Node Problemmentioning

confidence: 99%

Optimizing RTS/CTS to Improve Throughput in Ad Hoc WLANs

Weyulu

Hanada

Kim

2017

Proceedings of the 2017 Federated Conference on Computer Science and Information Systems

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Abstract-IEEE 802.11 WLANs use carrier sense multiple access with collision avoidance (CSMA/CA) to initiate the Request to Send / Clear to Send (RTS/CTS) handshaking mechanism that solves the hidden node problem. However RTS/CTS also causes the exposed node problem where a node is unnecessarily prevented from accessing the wireless channel even when such access will not disrupt another nodes ongoing transmission. In this paper, we present continuing evaluation of a method for reducing exposed nodes in 802.11 ad hoc WLANs using asymmetric transmission ranges for RTS and CTS frames. NS-2 simulations show that the proposed method improves overall network throughput in a topology scenario of a 3-D network faced with ceiling/floor obstructions.

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Section: Exposed Node Problemmentioning

confidence: 99%