Widely accepted WLAN technology and the deploying UMTS system are two major wireless networks in the future. Much of interests have been involved in integrating these networks to take the advantage of both high data rate of WLAN and wide coverage area of cellular networks and supporting end to end QoS is an inevitable topic towards such a goal. In this paper, we discuss issues related to provid...

The upcoming IEEE 802.11e is an extension of the 802.11 Wireless Local Area Network (WLAN) standard. We use this new standard with its priority provisioning mechanism to address fairness issues that occur when geographically co-located WLANs share the radio channel in the so-called Overlapping Basic Service Set environment. By allowing a new mechanism that is part of the 802.11e, called EDCF-TX...

Wireless networks are very popular nowadays. Wireless Local Area Network (WLAN) that uses the IEEE 802.11 standard and WiMAX (Worldwide Interoperability for Microwave Access) that uses the IEEE 802.16 standard are networks that we want to explore. WiMAX has been developed over 10 years, but it is still unknown to most people. However compared to WLAN, it has many advantages in transmission spee...

Wireless Local Area Network (WLAN) can provide high data-rate wireless multimedia applications to end users in a limited geographical area and has been widely deployed in recent years. For indoor WLAN systems, how to efficiently improve service coverage is a challenging problem. In this paper, we propose a coverage improvement scheme that can identify suitable Mobile Stations(MS) in good servic...

IEEE 802.11 based Wireless Local Area Network (WLAN) system has been rapidly developed and deployed. With limitations of the standard and rapidly growing wireless application demand, the air interface acts as bottleneck even in high-speed WLAN systems such as 802.11a and 802.11g. To improve overall performance of 802.11 WLAN under large deployment and heavy application demand environment, a nov...

A novel planar antenna with WiMAX and WLAN bandnotched characteristics is presented for ultra-wideband (UWB) applications. The UWB antenna consists of a staircase-shaped radiating element, a microstrip feedline and a modified ground plane. To realize WiMAX band-notched characteristic, a pair of hook-shaped slots is etched on the radiating element. Two folded stubs extending from the ground plan...

A novel compact CPW-fed printed dipole antenna is proposed for dual-band Ultra wide band (UHF) RFID and wireless local area network (WLAN) operations. This antenna consist of two dipole elements and it covers 2.53 GHz Ultra High Frequency (UHF) RFID and 5.2 GHZ WLAN IEEE 802.11 Standards. The return loss, radiation pattern, field pattern, linear and circular polarization components are simulate...

IEEE 802.11 wireless Local Area Network (WLAN) have become more and more popular due to easy to deployment and lower cost. It can only provide a best effort service and do not have quality of service (QoS) support for real time (RT) traffic. The IEEE Task Group has been proposed a new standard IEEE 802.11e[1] to address this MAC-layer QoS issue of WLAN. In this paper we proposed a new service d...

Wireless local area network (WLAN)-based localization is key for advanced indoor Internet-of-Things and embedded sensor applications. To further improve the accuracy of localization, attention has been focused on WLAN-based using channel-state information (CSI) in addition to existing provided by received signal strength (RSS). For easy low cost installation wireless sensing, sensing based stan...

Wireless local area networks (WLANs) are becoming increasingly popular in offices, homes, and public places. In public “hotspots” such as airports and hotels, these networks can be used to provide broadband wireless connectivity for people on the move. In Finland, hotspot networks are operated by TeliaSonera and DNA Finland. Because of interference issues, only one WLAN network can usually be b...