In this paper, we propose the seamless switching scheme of RSVP (resource ReSerVation Protocol) branch path for soft handoff in IP micro-mobility domain. Typically, in order to minimize the handoff service disruption of RSVP flows, RSVP message delays and signaling overheads should be minimized. We firstly propose the rerouting scheme of RSVP branch path at a crossover router (CR) at every hand...

To satisfy both the bandwidth efficiency of low-speed mobile hosts (MHs) and seamless handoff of high-speed MHs in cellular networks, this paper proposes a reservation scheme which exploits a dynamic two-tier cell structure and the handoff probability. The dynamic two-tier cell structure determines the reservation and non-reservation zones according to the speed of MHs. The handoff probability ...

Two important Quality of Service (QOS) parameters in cellular networks are call blocking probability (CBP) and handoff dropping probability (HDP). CBP represents the probability that a new call is blocked due to unavailability of channels. HDP represents the probability that a handoff call is dropped if no channel is available in the new cell. How to keep the probability of handoff drops within...

As the number of mobile users in cellular systems increases, the user mobility becomes the dominating factor for guaranteeing quality of services (QoS). In order to support QoS for mobiles in cellular systems, the concept of accumulated user mobility is combined with the handoff algorithm to reduce the amount of reserving channels (codes) for handoff calls and increase the total carried traffic...

In the case of a 3G-WLAN interworking architecture, handoff latency is mainly caused by the delays incurred when a mobile station (STA) transfers a current security context to the target access network or establishes connectivity to a new access point (AP). Existing handoff optimization schemes have mostly focused on reducing the scanning time which is to discover nearby access points. Even tho...

Over the last decade, we have witnessed a growing interest in the design and deployment of various network architectures and protocols aimed at supporting mobile users as they move across different types of networks. One of the goals of these emerging network solutions is to provide uninterrupted, seamless connectivity to mobile users giving them the ability to access information anywhere, anyt...

Vertical Handoff (VHO) scheme is designed based on the interworking architecture of WLAN/WIMAX which aims to provide always the best Quality of Service (Qos) for users. The performance of applications and network conditions are considered in the handoff process. The handoff procedures are normally initiated when the stations move across the border of WLANs. As a result, both the fixed station a...

−In future wireless broadband networks, bandwidth demands could fluctuate abruptly due to movement of high data rate users. Dynamic bandwidth reservation plays a key role in ensuring that mobile calls are not disrupted after they are admitted into the network. We propose a dynamic guard bandwidth scheme that adapts the amount of guard bandwidth in both wired and wireless links according to real...

We propose an admission control policy for wireless multimedia networks that is based on the well known threshold-based guard channel method. The new scheme deals with two different types of traffic classes; namely: voice and data. We assume two different thresholds, one for each traffic class. In addition, we propose to buffer the handoff data calls if no free channels are available rather tha...