Sensors 2011, 11(10), 9700-9716; doi:10.3390/s111009700
Article

Coexistence of WiFi and WiMAX Systems Based on PS-Request Protocols

1 Department of Electronics and Communications Engineering, Kwangwoon University, Seoul 139-701, Korea 2 Department of Electronics Convergence Engineering, Kwangwoon University, Seoul 139 701, Korea 3 Department of Information Control Engineering, Kwangwoon University, Seoul 139-701, Korea 4 Department of Electronic Engineering, Kwangwoon University, Seoul 139-701, Korea 5 Department of Computer Engineering, Kwangwoon University, Seoul 139-701, Korea
This work was presented in part at Future Generation Information Technology (FGIT) 2010, Jeju Island, Korea, 13–15 December 2010.
* Author to whom correspondence should be addressed.
Received: 28 August 2011; in revised form: 28 September 2011 / Accepted: 9 October 2011 / Published: 13 October 2011
(This article belongs to the Special Issue Selected Papers from FGIT 2010)
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Abstract: 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.
Keywords: coexistence; mutual interference; power saving mode; PS-Request; duration field

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MDPI and ACS Style

Kim, J.; Park, S.; Rhee, S.H.; Choi, Y.-H.; Chung, Y.-U.; Hwang, H.Y. Coexistence of WiFi and WiMAX Systems Based on PS-Request Protocols. Sensors 2011, 11, 9700-9716.

AMA Style

Kim J, Park S, Rhee SH, Choi Y-H, Chung Y-U, Hwang HY. Coexistence of WiFi and WiMAX Systems Based on PS-Request Protocols. Sensors. 2011; 11(10):9700-9716.

Chicago/Turabian Style

Kim, Jongwoo; Park, Suwon; Rhee, Seung Hyong; Choi, Yong-Hoon; Chung, Young-uk; Hwang, Ho Young. 2011. "Coexistence of WiFi and WiMAX Systems Based on PS-Request Protocols." Sensors 11, no. 10: 9700-9716.

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