WLAN IMPLEMENTATION AND PERFORMANCE ANALYSIS

Wireless networks are fast becoming ubiquitous in today's highly networked world. New applications based on 802.11 standards are rapidly expanding into corporate, residential, Wireless-Internet-Service-Provider (WISP), and hot-spot applications. With the advent of WLAN technologies, users are increasingly demand for WLAN high performance. Hence, the main focus of this project is to study, observe and experiment the WLAN implementation and performance analysis. The WLAN implementation and performance characteristics are firstly studied and several experiments are conducted. Two major applications are also performed under the wireless network condition that are File Transfer Protocol (FTP) and video streaming. The results show that the WLAN performance depends on location factors, network load and signal strength. The client location will affect the performance of interbuilding WLAN file transfer process. The media streaming performance can degrade significantly by signal quality

A novel multipath-transmission supported software defined wireless network architecture

The inflexible management and operation of today\u27s wireless access networks cannot meet the increasingly growing specific requirements, such as high mobility and throughput, service differentiation, and high-level programmability. In this paper, we put forward a novel multipath-transmission supported software-defined wireless network architecture (MP-SDWN), with the aim of achieving seamless handover, throughput enhancement, and flow-level wireless transmission control as well as programmable interfaces. In particular, this research addresses the following issues: 1) for high mobility and throughput, multi-connection virtual access point is proposed to enable multiple transmission paths simultaneously over a set of access points for users and 2) wireless flow transmission rules and programmable interfaces are implemented into mac80211 subsystem to enable service differentiation and flow-level wireless transmission control. Moreover, the efficiency and flexibility of MP-SDWN are demonstrated in the performance evaluations conducted on a 802.11 based-testbed, and the experimental results show that compared to regular WiFi, our proposed MP-SDWN architecture achieves seamless handover and multifold throughput improvement, and supports flow-level wireless transmission control for different applications