Abstract—After the advent of cellular standards for mobile wireless voice telephony and data transfer, IEEE 802.11 and IEEE 802.16 standards evolved for wireless broadband data transfer. The IEEE 802.11 replaced the wired LAN and IEEE 802.16 was to wireless point-to-point provide broadband data transfer. IEEE 802.11 operates in 2.4 GHz and 5 GHz band whereas IEEE 802.11 which was initially designed to operate on licensed band, later switched to 2-11 GHz band. However, both these standards used 5 GHz unlicensed band for transmission causing the possible overlap of channels. The designed protocols fairly allow the sharing on ad-hoc basis. IEEE 802.11 operated in distributed coordination mode using Distributed Coordination Function (DCF) and point coordinated mode using a dedicated coordinator node called as Point Coordination Function (PCF). However, DCF mode allows spectrum sharing for multiple users. Both standards were not designed for coexistence and thereby they may cause interference to each other, degrading their performance. Mechanisms can be designed at various layers such as MAC or PHY to enable the coexistence with desired QoS. In this paper, performance analysis of the impact of possible interference between IEEE 802.11 and IEEE 802.16 devices is presented i.e multiple homogeneous systems and also heterogeneous systems. An NS2 based simulations are used to analyze the impact of interference on performance. The simulation results indicates that the performance of both the systems degrade drastically which results in degradation spectral efficiency.
Index Terms—Coexistence, IEEE 802.16 (WiMAX), IEEE 802.11 (Wi-Fi), MAC, PHY, spectrum efficiency, unlicensed frequencies.
R. H. Adekar is with National Institute of Electronics & Information Technology, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, India (e-mail: rh_adekar@rediffmail.com). A. K. Kureshi is with Department of Electronics and Telecommunication Engineering and is also a Director of MMANTC, College of Engineering MANSOORA, Malegaon, Savitribai Phule Pune University, India (e-mail: akkureshi@rediffmail.com).
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Cite:R. H. Adekar and A. K. Kureshi, "Performance Analysis of Co-existence between IEEE 802.11 (Wi-Fi) and IEEE 802.16 (WiMAX) Standards without Interworking ," International Journal of Computer Theory and Engineering vol. 14, no. 2, pp. 73-78, 2022.
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