To solve the problem of CDMA2000 capacity, cellular service providers in Korea have started WCDMA commercial service since 2004. The initial deployment has been done in highlycrowded city center similar to islands of coverage. Therefore, inter-RAT handover from WCDMA to CDMA2000 should be developed to provide seamless service throughout the whole country. We develop several handover procedures ...

Vehicular Ad Hoc Network (VANET) is an emerging technology in which mobility management, continuous connectivity and security on data transmission between vehicles with high speed or during the change of topology of the network acts as a challenging exploration issue of Intelligent Transportation System (ITS) applications. This paper aims to formulate a ubiquitous connectivity to nodes by keepi...

BACKGROUND We aimed to improve the quality and safety of handover of patients from surgery to intensive care using the analogy of a Formula 1 pit stop and expertise from aviation. METHODS A prospective intervention study measured the change in performance before and after the implementation of a new handover protocol that was developed through detailed discussions with a Formula 1 racing team...

Mobile IP (Internet Protocol) allows a mobile node to send and receive packets with its home IP address, regardless of the IP address of its current point of attachment in the Internet. Since Mobile IP induces the handover latency due to mobility management operations, fast handover algorithms have been studied to reduce the latency. In this paper, we optimize the handover procedure in Fast Han...

In the process of inter-domain handover, according to the partner-based hierarchical mobile IPv6 protocol (PHMIPv6), the longer configuration time for a new care-of-address may cause an interrupt in the current wireless connections and cause higher handover latency and packet loss rate. This paper proposes an improved handover mechanism based on PHMIPv6, named B-CDHO. A fPN and bPN are defined ...

-The demand for wireless broadband services is growing rapidly. Mobile WiMAX is one of the most promising technologies for broadband wireless communication. It allows users to roam over the network under vehicular speeds. However since IEEE 802.16e standard for Mobile WiMAX defines only hard handover mandatory, Mobile WiMAX cannot transmit or receive packets during handover. Thus real-time pack...

The constrained application protocol (CoAP) can be used for remotely controlling various sensor devices in Internet of Things (IoT) networks. In CoAP, to support the handover of a mobile sensor device, service discovery and message transmission needs to be repeated, although doing so would increase the handover delay significantly. To address this limitation of CoAP, a centralized CoAP scheme h...

Advances in Network-centric Warfare require that speech and data must be shared among all tactical levels and across different network domains while the communication still is secured. SCIP (Secure Communications Interoperability Protocol) is an applicationlayer communication protocol designed to ensure secure end-to-end communication. When SCIP is implemented on mobile terminals operating in a...

Wireless network devices are equipped with multiple access technologies like UMTS and Wireless LAN. The handover between the technologies has been widely studied in literature. Several of these research papers build their handover mechanisms on top of existing protocols like Mobile IP. The protocols however, operate on the network layer and only react on link layer changes. Consequently, a seam...

In this paper, we propose an end-to-end network architecture based on Worldwide Interoperability for Microwave Access (WiMAX) over Ethernet Passive Optical Network (EPON) and present a security framework adopting both RSA and Extensible Authentication Protocol (EAP) authentication. We also introduce handover scenarios in the integrated network and propose corresponding handover schemes, for whi...