The paper analyzes three handoff algorithms which are used in Radio-over-Fiber (RoF) networks at 60 GHz. Specifically, the Virtual Cellular Zone (VCZ) and the Moving Extended Cell (MEC), are presented, against the Traditional Handoff (THO) algorithm, which is the simplest proposed solution in such networks. The mathematical analysis regarding packet losses for all three handoff algorithms is pr...

The use of soft-handoff may have a substantial impact on the downlink of cellular CDMA systems, by reducing its capacity. This depends heavily on the parameters used in the handoff procedure. In this paper we estimate this impact with several sets of parameter values. We first derive an analytical solution for a general CDMA system. Then the IS-95 handoff procedure is simulated in order to esti...

Network Mobility (NEMO) is concerned with managing the mobility of an entire network and included one or more Mobile Routers (MRs) which are connected as gateways to the Internet. This paper proposes the optimal handoff decision mechanisms, not only avoiding the ‘ping-pong effect’ and frequent handoffs, but also reducing handoff latency under multi-hop network mobility. The simulation results d...

In this paper we evaluate a low latency handoff protocol for MIPv4, the Post-Registration handoff method. This mechanism proposed by the IETF tries to improve the performance of Hierarchical Mobile IP by decreasing the handoff latency. We give a detailed description of the protocol behavior by means of an ns simulation and propose a simple queuing model to study the influence of various paramet...

Abstract--In this paper the performance of WLAN is analyzed in the presences of UMTS nodes. To analyze this interference UMTS are nodes are moving using different trajectories. While moving UMTS nodes handoff (soft and hard) techniques are used in this paper. To analyze this effect OPNET modeler is used. The performance is compared In terms of load, media access delay and packet delay variation...

Mobility is the most important feature of a wireless cellular communication system. Usually, continuous service is achieved by supporting handoff (or handover) from one cell to another. Handoff is the process of changing the channel (frequency, time slot, spreading code, or combination of them) associated with the current connection while a call is in progress. It is often initiated either by c...

This paper is concerned with the influences of enlarging or shrinking the soft handoff coverage on the new-call blocking and the handoff-call dropping probabilities in a cellular CDMA system. In the proposed analytic model, we assume a cell is in hexagonal shape with two parameters, a and b, representing the soft handoff region between the outer and the inner cell. In the traffic model, we assu...

Recently, artificial neural networks have been utilized to improve handoff algorithms due to its ability to handle large data in fast processing. ANN helps in taking the handoff decision based on RSS, speed, traffic intensity, and directivity. RBF network is used for making a handoff decision to the chosen neighbor BS. Efficient handoff algorithm enhances the capacity and QoS of cellular system...

In 2010, the Accreditation Council for Graduate Medical Education released its resident duty hours restrictions, requiring that faculty monitor their residents' patient handoffs to ensure that residents are competent in handoff communications. Although studies have reported the need to improve the effectiveness of the handoff and a variety of curricula have been suggested and implemented, a com...

In multimedia cellular network, a Mobile Host (MH) requests multimedia services and may experience handoffs to several cells. When the target cell cannot provide adequate bandwidth for a service, instead of directly dropping a request, the MH is put into the handoff queue and hopefully the request bandwidth can be satisfied by later released bandwidth. Obviously, it is important to properly ass...