This paper provides an exhaustive performance analysis by simulation of the SCTP transfer protocol in WiMAX and Wi-Fi networks. We provide also a comparison of SCTP with both transfer protocols UDP for VoIP applications and TCP for FTP sessions, as SCTP can support these two types (elastic and non-elastic) of traffic. Finally, we study how SCTP performs when a mobile is multi-homed, i.e. connec...

Corresponding to the rise and acceptance of the 802.11b standard (Wi-Fi) in the United States, wireless local area networks (WLANs) that offer high-speed Internet access at numerous locations in markets that cover education, health care, manufacturing, retail, hospitality, government, and transportation are experiencing rapid growth. There has also been an active establishment of innovative bus...

Introduction The reliable delivery of latency-sensitive voice and video streams mandates the use of transport mechanisms with very low packet loss, jitter, and delay. IP PBX systems already incorporate the necessary mechanisms to deliver these services over local area networks (LANs) and wide area networks (WANs). The introduction of corporate Wi-Fi networks and wireless clients introduces a di...

Mobile devices are beginning to have multiple wireless interfaces. There is a need for these devices to move freely across different networks and achieve seamless handoff across heterogeneous wireless network. In our simulation we performed handover between Wi-Fi (WLAN) and WiMAX network using link trigger [1] mechanism at Layer2. The trigger generated at Layer2 helps in reducing disconnection ...

University campuses are busy places for wireless client traffic coming from Wi-Fi connections and other wireless devices that contend for the 2.4 GHz frequencies space that most campus Wi-Fi networks use currently. This is making the 2.4 GHz frequency unsuitable for WiFi connection due to too much interference from other devices as well as from Wi-Fi connections themselves. TV white space could...

Wireless networks are now proliferating due to the success of the IEEE 802.11b protocol, also known as “Wi-Fi” (Wireless Fidelity). A Wi-Fi network is characterized by a set of base stations (also called access points) placed throughout the environment and connected to the traditional wired LANs. This technology allows nomadic users a broadband access to the Internet if they are in the transmis...

Prevalent Wi-Fi networks have adopted various protections to prevent eavesdropping caused by the intrinsic shared nature of wireless medium. However, many of them are based on pre-shared secret incurring key management costs, and are still vulnerable from practical countermeasures. In this study, we investigate the feasibility of using defensive jamming technique to protect enterprise Wi-Fi net...

In heterogeneous networks (HetNets), the vertical handover (VHO) is an essential process for mobile users (MUs) aiming to secure ubiquitous connectivity and maintain highest quality of service (QoS) across various types radio access technology (RAT), such as wireless fidelity (Wi-Fi), global system communication (GSM), universal telecommunications (UMTS). literature, many recent VHO research wo...

For the development of the 4G wireless networks the design of seamless and efficient Vertical handovers is an essential issue. Next generation wireless communications will likely rely on integrated networks consisting of multiple wireless technologies. So the integration of WiMAX with other wireless technologies, such as WLAN, Wi-Fi, UMTS or 3G, has attracted research community for the last few...