title: Coexistence of WiFi and WiMAX systems based on PS-request protocols.
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.
authors.affiliation: Department of Electronics and Communications Engineering, Kwangwoon University, Seoul 139-701, Korea. jongwoo_kim@kw.ac.kr
authors.forename: Jongwoo
authors.initials: J
authors.lastname: Kim
authors.forename: Suwon
authors.initials: S
authors.lastname: Park
authors.forename: Seung Hyong
authors.initials: SH
authors.lastname: Rhee
authors.forename: Yong-Hoon
authors.initials: YH
authors.lastname: Choi
authors.forename: Young-uk
authors.initials: YU
authors.lastname: Chung
authors.forename: Ho Young
authors.initials: HY
authors.lastname: Hwang
mesh_terms: D003198:Computer Simulation; D020407:Internet; D008872:Microwaves; D013997:Time Factors; D059015:Wireless Technology