Jhon Padilla

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This paper describes an optimized model to support QoS by mean of Congestion minimization on LSPs (Label Switching Path). In order to perform this model, we start from a CFA (Capacity and Flow Allocation) model. As this model does not consider the buffer size to calculate the capacity cost, our modelnamed BCA (Buffer Capacity Allocation)take into account(More)
Next generation cellular networks are based on packet switching and has QoS support based on architectures such as integrated services. To calculate the QoS parameters such as packet delay will be very important. In order reach to this goal, in this paper we propose a model for an integrated services wireless access router. Our model describes the user(More)
Here we describe a 2-step temporal phase unwrapping formula that uses 2-sensitivity demodulated phases for measuring static surfaces. The first phase demodulation has at most 1-wavelength sensitivity and the second one is G-times (G>>1.0) more sensitive. Measuring static surfaces with 2-sensitivity fringe patterns is well known and recent published methods(More)
In this paper we describe a high-resolution, low-noise phase-shifting algorithm applied to 360 degree digitizing of solids with diffuse light scattering surface. A 360 degree profilometer needs to rotate the object a full revolution to digitize a three-dimensional (3D) solid. Although 360 degree profilometry is not new, we are proposing however a new(More)
In this paper, we describe a new hardware tool to test new Quality of Service proposals. Thus, we want to reduce the digital divide between Latin America development countries. The problem is that in our region it is difficult to build hardware prototypes for new networking protocols and methods. Our tool, named U2-Route, is based on a NetFPGA board, an(More)
We present a new method to improve the bandwidth of HMIPv6 networks called HMIPv6-BI. This approach proposes a modification to the Hierarchical Mobile IPv6 protocol. The goal of HMIPv6-BI is to minimize the Bandwidth usage of the Radio Link between the Access Router (AR) and the Mobile Node (MN). Currently, in HMIPv6 a tunnel is established between the(More)
In this paper we propose a new approach for Quality of Service (QoS) support on Internet. This approach, named IntServ6, is based on the Integrated Services Architecture (ISA). It takes advantage of the IPv6 header flow label field to improve a set of the standard ISA properties such as reservations within tunnels, flows aggregation and interconnection with(More)
Next generation mobile networks (NGN) will be based on IPv6. Then, NGNs will require mobility protocols such as MIPv6 and HMIPv6. Also, they should support quality of service by means of technologies such as the integrated services architecture. In this context, a problem to distinguish reservations arises when resource reservations within tunnels are(More)