An increasing number of public WLAN hotspots are being deployed in locations such as hotels, airports, and cafes around the world. Also mobile operators have found public WLAN services to be complementary to their other service offerings, providing a possible source of new revenues. The emergence of WLAN-enabled handsets will further increase the demand for these services. Mobile operators are ...

WLAN has strong potential to provide a perfect broadband complement to the 3G wireless systems. This has raised much interest in their integration. In this paper, a novel architecture using the Network Inter-operating Agent (NIA), and Integration Gateway (IG) is proposed to integrate the 3G systems and WLANs of various providers that may not necessarily have direct service level agreement (SLA)...

Internet of Things (IOT) applications are being widely deployed in many industrial and social fields, and guarantee of the safety of IOT related data transmission is the key for successful IOT related businesses. Our study provides a new way to secure the data transmission of the Wireless Local Area Network (WLAN) related IOT applications. The WLAN-based IOT application is mainly composed of WL...

This paper presents a new approach for the design of a multiband uniplanar CPW-fed monopole antenna. The antenna consists of a fork like monopole strip to which is added an inverted U-shaped strip. The three branch fork like strip can create three resonant bands within the WLAN range while the placement of the inverted U-shaped strip provides a better impedance matching for the lowest resonant ...

The present third generation (3G) wireless technology can provide data oriented applications. However, the bit rate is limited to around 2 Mbps with limited mobility. Today, more applications demand high data rate and reasonable mobility. Therefore, by integrating 3G cellular system and wireless local area network (WLAN), there is a potential to push the data rate higher. This integration means...

As universal mobile telecommunications system (UMTS) and wireless local area network (WLAN) have complementary characteristics, convergence of UMTS and WLAN offer seamless wireless access service to users. In a converged UMTS/WLAN enhancing quality of service (QoS) for different services require call admission control and load balancing. This paper analyses the performance of wideband power bas...

UMTS networks promise to offer always on, ubiquitous connectivity with relatively low data rates for moderate to high mobility users in macro cell environments. On the other hand, IEEE 802. 11 (WLAN) offers much higher data rates, comparable to 3G and other wireless local area networks, to users with low mobility characteristics in smaller cell environments. Where UMTS/WLAN networks overlap, a ...

The third-generation (3G) mobile communication systems provide great coverage, complete subscriber management and nearly universal roaming. Nevertheless, 3G systems are subject to the low data rates (2Mbps highest for WCDMA). WLAN (Wireless Local Area Network) provides hot spot coverage with high data rates (reaches 54Mbps while 802.11 a/g), but is subject to short range (reaches 100m the furth...

a newly designed printed slot antenna is presented that incorporates variable two band-notched functions for ultra-wideband (uwb) applications. the two band notches of this coplanar waveguide (cpw) fed antenna are achieved by an m-shaped slot (mss) embedded in the radiating element and a c-shaped strip(css) close to ground plane, therefore two very narrow rejected properties in the wireless loc...

Protocol ∗ Liufei Wu1,2 Yuqing Zhang2 FengjiaoWang2 1Communication Engineering Institute,Xidian University,Xi’an 710071 2National Computer Network Intrusion Protection Center,GUCAS, Beijing100049 Abstract We first do an in-depth security analysis of the authenticated key exchange protocol WAI in WAPI (WALN Authentication Privacy Infrastructure), point out its flaws and improve it. Next, we give...