We introduce both the coexistence zone within the WiMAX frame structure and a PS-Request protocol for the coexistence of WiFi and WiMAX systems sharing a frequency band. Because we know that the PS-Request protocol has drawbacks, we propose a revised PS-Request protocol to improve the performance. Two PS-Request protocols are based on the time division operation (TDO) of WiFi system and WiMAX system to avoid the mutual interference, and use the vestigial power management (PwrMgt) bit within the Frame Control field of the frames transmitted by a WiFi AP. The performance of the revised PS-Request protocol is evaluated by computer simulation, and compared to those of the cases without a coexistence protocol and to the original PS-Request protocol.
References
[1]
Chiasserini, CF; Rao, RR. Coexistence mechanisms for interference mitigation between IEEE 802.11 WLANs and bluetooth. Proceedings of INFOCOM 2002, New York, NY, USA, June 2002; pp. 590–598.
[2]
Golmie, N; Chevrollier, N; Rebala, O. Bluetooth and WLAN coexistence: Challenges and solutions. IEEE Wirel. Commun 2003, 10, 22–29.
[3]
Hsu, AC-C; Wei, DSL; Kuo, C-CJ. Coexistence mechanism using dynamic fragmentation for interference mitigation between WiFi and Bluetooth. Proceedings of MILCOM 2006, Washington, DC, USA, October 2006; pp. 1–7.
[4]
Sikora, A; Groza, VF. Coexistence of IEEE 802.15.4 with other systems in the 2.4 GHz-ISM-Band. Proceedings of IMTC 2005, Ottawa, ON, Canada, May 2005; pp. 1786–1791.
[5]
Wei, Y; Xiangyu, W; Linnartz, J-PMG. A coexistence model of IEEE 802.15.4 and IEEE 802.11b/g. Proceedings of the 14th IEEE Symposium, Delft, The Netherland, November 2007; pp. 1–5.
[6]
Kim, D; Kim, J; Park, S; Rhee, SH; Kang, C; Han, K; Kang, H. Circulator-based collocated system for coexistence of WiFi and WiMAX systems in shared bands. Proceedings of the 1st International Conference on Ubiquitous and Future Networks, Hong Kong, June 2009; pp. 214–219.
[7]
Berlemann, L; Hoymann, C; Hiertz, GR; Mangold, S. Coexistence and interworking of IEEE 802.16 and IEEE 802.11(e). Proceedings of Vehicular Technology Conference, Melbourne, Australia, May 2006; pp. 27–31.
[8]
Berlemann, L; Hoymann, C; Hiertz, GR; Walke, B. Unlicensed operation of IEEE 802.16: Coexistence with 802.11(a) in shared frequency bands. Proceedings of PIMRC 2006, Helsinki, Finland, September 2006; pp. 1–5.
[9]
Siddique, MM; Wenning, BL; Muehleisen, M. Spectrum sharing between IEEE 802.16 and IEEE 802.11 based wireless networks. Proceedings of WoWMoM 2010, Montreal, QC, Canada, June 2010; pp. 1–6.
[10]
Jing, X; Raychaudhuri, D. Spectrum co-existence of IEEE 802.11b and IEEE 802.16a networks using the CSCC etiquette protocol. Proceedings of DySPAN 2005, Baltimore, MD, USA, November 2005; pp. 243–250.
[11]
Jing, X; Mau, S-H; Raychaudhuri, D; Matyas, R. Reactive cognitive radio algorithms for co-existence between IEEE 802.11b and 802.16a networks. Proceedings of GLOBECOM’05, St Louis, MO, USA, November 2005; pp. 2465–2469.
[12]
IEEE Std 80216h？-2010. IEEE Standard for Local and Metropolitan Area Networks—Part 16: Air interface for Broadband Wireless Access Systems; IEEE Computer Society: New York, NY, USA, 2010.
[13]
John, S; Amir, G. C80216h-07/017, Simulation of IEEE 802.16h and IEEE 802.11y Coexistence (Preliminary Report), Available online: http://ieee802.org/16/le/contrib/C80216h-07_017.pdf (accessed on 28 August 2011).
[14]
Kim, J; Park, S; Rhee, SH; Choi, Y-H; Hwang, H. Energy Efficient Coexistence of WiFi and WiMAX Systems Sharing Frequency Band; Springer: Berlin, Germany, 2010; Volume 6485, pp. 164–170.
[15]
Kim, J; Park, S; Choi, H-Y; Rhee, SH. Performance of WiFi system due to interference from WiMAX system in a shared frequency band. Proceedings of China-Korea Joint Conference on Information and Communications, Xi’an, China, August 2008; pp. 103–104.
[16]
IEEE Std 80211？-2007. IEEE Standard for Local and Metropolitan Area Networks-Specific Requirements, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications; IEEE Computer Society: New York, NY, USA, 2007.
[17]
IEEE Std 80216？-2004. IEEE Standard for Local and Metropolitan Area Networks-Part 16: Air Interface for Fixed Broadband Wireless Access Systems; IEEE Computer Society: New York, NY, USA, 2004.
[18]
Kim, J; Park, S; Rhee, SH; Choi, Y-H; Hwang, H; Chung, Y. Coexistence of WiFi and WiMAX systems based on coexistence zone within WiMAX frame structure and modified power saving mode of WiFi system. IEICE Trans Commun 2011, E94-B, 1781–1784, doi:10.1587/transcom.E94.B.1781.
