E-learning provides a solution to meet the challenge of enrolments increasing. This paper describes design and implementation of wireless LAN based virtual laboratory (WLANVL) used as an e-learning environment. Users of WLANVL can develop and remotely execute a variety of laboratory experiments over internet. The WLANVL mainly includes end user’s workbench, management server and lab resources w...

The goal of the Enhanced DCF (EDCF) is to provide a distributed access approach that can support service differentiation in IEEE 802.11e Wireless LAN. In this paper we propose a control mechanism to support fair and effective transmissions in IEEE 802.11e Wireless LAN. Since the proposed mechanism transmits packets using the link states and transmitted contents, higher transmission efficiency c...

When talking about location-based services, one of the key factors influencing the overall service quality is the positioning accuracy that the system can rely upon. Nowadays, wireless LAN hardware supports the variation of the transmission power in a wide range. In this paper, two novel algorithms suitable for extension of common wireless LAN-based positioning systems are presented. These nove...

This paper adresses the optimization of handovers in a Wireless LAN/Mobile IP/QoS environment by giving control over the link layer handover process to the mobile node. This is done by transfering parts of the hardware’s functionality to a management software residing on the mobile node. The required handover thresholds have been determined by analyzing the wireless LAN hardware. The implemente...

Network parameters are vital ingredients of today’s data communication scenario especially Media access delay, download/upload response time and traffic sent/received .This Paper has taken into consideration the modeling and implementation of Wireless Local Area Network (WLAN) and wired Ethernet network (LAN) based on OPNET simulator 17.5 and evaluated the performance of the WLAN and LAN in a c...

As mobile devices become common in mainstream computing, it becomes imperative to effectively design computing architectures that seamlessly and effectively integrate them. Rapid advancements in wireless technology has made it possible to build efficient wireless local area networks (WLANs). Designing WLANs presents some unique challenges. Some heuristics are available for WLAN design, but they...

This paper focuses on the implications of employing CORBA Middleware in today’s wireless telecommunications services and applications developments. It seeks to understand what current opportunities exist to support the use of this technology and assesses some of the performance implications that might be encountered. Discussion also revolves around the use of Component Oriented Development tech...

——VoIP over Wireless LANs is greatly affected by path-loss, RF interference and other sources of signal attenuation in addition to network congestion. The primary factors involved in effective real-time communication, namely delay and loss, must be within certain controlled limits in such a scenario. Wireless LAN Access Points must, therefore, act in tune with the codecs to ensure high quality ...