Cellular networks, e.g. UMTS, provide voice and data services to mobile users. In hot spots where users need high speed data services operators can deploy low-cost high-speed WLANs, e.g. 802.11, to cover hot-spots. This paper proposes a possible architecture of integrating UMTS and 802.11 WLAN. The architecture allows a mobile node to maintain data (PS) connection through WLAN and voice (CS) co...

Usage of WiFi is becoming increasingly popular in public wireless LAN (WLAN) settings like malls, airports and train stations. Similarly to other prominent examples of WiFi usage like enterprise and home settings, publicWLANs could also benefit from an SDN-based coordinated management framework that deals with issues like interference and mobility management. However, unlike these settings, pub...

In this paper we present a methodology for the evaluation of networked systems communicating using WLAN technology. We show a case study of goal-oriented cooperating robots, for which our approach is particularly useful. Developing robots is expensive; hence emulation can be employed in the first part of the development cycle to study robot software implementations in realistic conditions at a ...

More and more users subscribing to wireless broadband services are seeking to have access to both WLAN and UMTS networks. We study individually optimal user-network association in an integrated WLAN and UMTS hybrid cell. The association problem is formulated within a non-cooperative game framework. In the formulation, mobile arrivals are assumed to follow the Poisson process and each mobile con...

Though WLAN wireless network has been widely deployed as the main split-flow deployment of the communication network, little study emphasizes its performance as WLAN protocols were only designed for the public communicating conveniently with each other. Actually that too much wireless access points assembling together will cause self-interference to the whole WLAN network. This paper investigat...

In this paper, we propose an OSA-based development environment for interworking WLAN and 3G cellular networks. The main goal of our work is to establish and create an environment that can serve as a demonstration of a working network for OSA-based application developers while featuring mobile services over the interworked LAN and 3G cellular networks. The proposed simulating environment has (i)...

Due to the integration of different wireless applications at different bands on a single device, multi-band microstrip patch antenna is the best solution keeping the overall size of the device small. In the present work, a metamaterial-inspired antenna is proposed for WiMAX/WLAN applications. Design studies, parametric analysis, simulation results along with measurements for a L-shape slotted g...

In this document, the impact of a 20dBm 802.11 Direct-Sequence WLAN system on a 0dBm Bluetooth link is studied. A typical office environment is assumed with a small number of WLAN access points and a large number of WLAN terminals. The study differentiates between the impact on the Bluetooth data link and the impact on the Bluetooth voice link. Results show that a Bluetooth voice link is distur...

Studies have proposed that wireless local area networks (WLAN) can be applied in medical applications to enhance the quality of patient care, such as patient monitoring systems and hospital admission systems. However, there has been concern regarding the effect of electromagnetic interference (EMI) on medical equipment from wireless communication devices, especially those at close proximity to ...

Self-organized networks might be a disruptive technology in the mobile telecommunication industry, posing a credible threat to the current network operators' dominance of mobile applications and services. Indeed, with the emergence of wireless broadband networks based on clusters of Wireless Local Area Network (WLAN) hotspots, self-organized networks might become an important alternative to UMT...