A MAC PERFORMANCE OF MOBILE AD-HOC 802.11AC LAN OVER CORRELATED FADING CHANNEL
Published In: 3RD INTERNATIONAL CONFERENCE ON ADVANCES IN COMPUTING, CONTROL AND NETWORKING
Author(s): HA CHEOL LEE
Abstract: FER (Frame Error Rate) and MAC (Medium Access Control) throughput are derived over error-prone channel in the IEEE 802.11ac mobile ad-hoc LAN. In this paper, DCF (Distributed Coordination Function) protocol and A-MPDU (MAC Protocol Data Unit Aggregation) scheme are used to evaluate the MAC throughput. Using theoretical analysis method, A MAC saturation throughput is evaluated according to the mobile speed and the number of frames in each A-MPDU on the condition that the number of station, frame payload size, transmission probability, the number of parallel beams and fading margin are variables. When the mobile speed is typically 1 m/sec and the number of aggregated MPDUs in each A-MPDU is 100, it is identified that the MAC layer throughput of IEEE 802.11ac can be maximally attained up to a 97.2% of physical transmission rate in this evaluation.
- Publication Date: 29-Dec-2015
- DOI: 10.15224/978-1-63248-082-8-12
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A WEB-BASED DECISION SUPPORT SYSTEM FOR USED-CAR PRICING
Published In: 3RD INTERNATIONAL CONFERENCE ON ADVANCES IN COMPUTING, CONTROL AND NETWORKING
Author(s): AYHAN DEMIRIZ
Abstract: Used-car trade has a significant portion in overall automobile market and determining the values of the cars is an important problem. This study proposes a new methodology for determining the market value of the used-cars by observing the classifieds in an e-commerce site. This type of data acquisition plays an important role to build pricing models and to conduct further analysis in our approach. In data acquisition stage, a set of new listings are chosen randomly each day from an ecommerce site (a web site like Craigslist), then these listings are observed until a pre-determined period (e.g. thirty days) or delisting time, whichever comes first. The crucial part of our approach is the assumption of a sale event when the listing is no longer available i.e. delisted from the e-commerce site. The proposed methodology may potentially be used for pricing any used item based on the web listings. A web site was developed to help clients/users for determining the market values of their cars
- Publication Date: 29-Dec-2015
- DOI: 10.15224/978-1-63248-082-8-13
- Views: 0
- Downloads: 0