Realistic Modeling of IEEE 802.11 WLAN Considering Rate Adaptation and Multi-Rate Retry

Title
Realistic Modeling of IEEE 802.11 WLAN Considering Rate Adaptation and Multi-Rate Retry
Author(s)
김영탁김이고르[김이고르]
Keywords
THROUGHPUT; CHANNEL
Issue Date
201111
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON CONSUMER ELECTRONICS, v.57, no.4, pp.1496 - 1504
Abstract
Most recent mobile multimedia devices, such as smart phones, laptops and tablet PCs, are equipped with IEEE 802.11 Wi-Fi interfaces for broadband wireless Internet access. The multimedia applications utilized by end users strongly require guaranteed QoS. Resource availability checking during initial connection establishment and seamless handover is essential under such conditions. Several analytical models of IEEE 802.11 WLAN have been proposed to estimate achievable throughput. However, they do not consider rate adaptations with multi-rate retry and individual channel conditions of each station. This paper proposes a realistic model to estimate achievable throughput considering Minstrel rate adaptation and multi-rate retry chain. The proposed model also considers each station individually, since stations may have different frame error rates in a real environment and thus, select different physical rates for frame delivery. Frame error rates are carefully read from the hardware registers of each station and applied to the model for enhanced accuracy. The correctness of the proposed model was verified through a series of experiments in a real testbed environment with up to 20 stations with MadWiFi interface cards. The proposed model shows accurate results in terms of aggregated and per-station throughput in various channel conditions.(1)
URI
http://hdl.handle.net/YU.REPOSITORY/24276
ISSN
0098-3063
Appears in Collections:
공과대학 > 모바일정보통신공학과 > Articles
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