Esquema de Timestamp en la Recepción de Paquetes de Prueba a Través de la Netfpga para la Estimación de Ancho de Banda Disponible en Traceband

Abstract

Applications and services currently being offered on the Internet as video on demand, require estimation parameters that determine the quality of a connection as the available bandwidth. To estimate the available bandwidth (ABW) have developed software tools to level as Pathload, Spruce and Traceband. These tools have limitations on the accuracy of the estimate due to delays suffered by packets in the inherent operating system processes. The tool requires precision in capturing the arrival time of packages and this is achieved by performing the timestamp on the physical level. To do the NetFPGA is used as it allows modifying the behavior as adding network card modules according to the needs of the project. In designing the scheme marking the arrival times of the test packets the Traceband tool is used, it is in charge of sending and calculation of ABW and NetFPGA is responsible for conducting the timestamp of packet arrival at the receiving hardware and based on this estimation value is performed ABW. The timestamp and Identification modules in NetFPGA, and the required changes in Traceband to communicate with NetFPGA were designed.