Distributed directional cooperative MAC (DD-CoopMAC) protocol for improving VBR throughput in IEEE 802.11ad WLAN
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Sådhanå (2020)45:245 https://doi.org/10.1007/s12046-020-01481-4
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Distributed directional cooperative MAC (DD-CoopMAC) protocol for improving VBR throughput in IEEE 802.11ad WLAN ILAYARAJA VENKATACHALAM1,* , SENTHILNATHAN PALANIAPPAN2 and SIRAJUDEEN AMEER JOHN3 1
Department of Information Technology, PSG College of Technology, Coimbatore 641004, India School of Computer Science and Engineering, Vellore Institute of Technology, Vellore 632014, India 3 Hyderabad, India e-mail: [email protected] 2
MS received 16 September 2019; revised 6 May 2020; accepted 11 July 2020 Abstract. The IEEE 802.11ad-based wireless local area network (WLAN) has emerged out as a promising network technology that is capable of operating on millimetre wave spectrum. This network is being used in many applications and can be extended to serve many different streams of the networking industry. However, the network still has some glitches with respect to throughput, overhead, etc., which need to be handled to make it more reliable and efficient. In this paper, distributed directional cooperative medium access control (DDCoopMAC) protocol for improving variable bit rate (VBR) throughput in IEEE 802.11ad WLAN is proposed. In this protocol, information about network stations is intelligently collected; based on this, the relay stations are selected for transmission. Simulation results illustrate that this protocol aids in enhancing the throughput and reducing the related overhead. Also, simulation results show that the proposed DD-CoopMAC has given high throughput and less MAC delay compared with D-CoopMAC and IEEE 802.11ad. Keywords.
IEEE 802.11ad; DD-CoopMAC; access point; relay station; VBR.
1. Introduction 1.1 802.11ad wireless networks Nowadays, many new applications like high-speed device synchronization and wireless display in wireless local area networks (WLANs) make use of multi-gigabit wireless communications based on 60-GHz mm wave spectrum. IEEE 802.11ad is a new physical and medium access control (MAC) layer modification for WLAN under mm wave spectrum. The main features of mm wave spectrum are short wavelength, high bandwidth and high interaction with atmospheric components. In IEEE 802.11ad, large steerable arrays are packed in small components that are involved in beamforming (BF), resulting in significant gains. The use of directional communication increases the spatial reuse due to the multiple communication links operating simultaneously in the same domain, causing no interference [1]. The current 802.11ad draft utilizes directional multi-gigabit (DMG) ability to achieve a theoretical maximum throughput of up to 7 Gbit/s [2]. Unfortunately, 802.11ad channels have high signal attenuation. To increase the coverage without increasing transmission power, 802.11ad uses directional communications, which *For correspondence
complicates random access. To achieve the best performance, both a transmitter and a receiver must adjust their antennas and directional transmission mak
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