RELOAD/CoAP architecture with resource aggregation/disaggregation service

M2M communication is expected to occur at a global level and for this reason federations of device networks are also expected. In such large scale environments, a critical issue is how to discover the available resources in a scalable manner. For this purpose CoAP Usage for RELOAD, a generic self-organizing P2P overlay network service, has been proposed to be used as a lookup service, to store available resources and as a cache for sensor data. However, such approach alone does not allow building an aggregate resource hierarchy, a very relevant issue for an efficient organization of data in future IoT applications. Here we address this issue and propose an architecture incorporating a resource aggregation/disaggregation service

Analysis of relod.net, a basic implementation of the RELOAD protocol for peer-to-peer networks

Actas de: XI Jornadas de Ingeniería Telemática (JITEL 2013) celebradas en Granada, 28-30 Octubre 2013. La web del evento es: http://dtstc.ugr.es/jitel2013/#The P2PSIP Working Group is chartered to develop protocols and mechanisms for the use of SIP in distributed environments, thus minimizing the need for centralized servers. Under this premise, the RELOAD protocol was created, whose design was generalized to accept other applications with similar requirements, and which is currently in process of standardization by the IETF. In this paper, we present a basic implementation and an analysis of this protocol proposed standard, given the great interest displayed in recent years by the scientific and business community in issues related to peerto- peer networks. Later, we conduct several experiments in order to validate its correct operation in real scenarios and provide feedback in relation with the current specificationThis research was supported in part by the Comunidad de Madrid grant S-2009/TIC-1468 (MEDIANET project).Publicad

Desarrollo de una implementación de referencia del protocolo RELOAD

El grupo de trabajo P2PSIP se creó para desarrollar protocolos y mecanismos que permitieran el uso de SIP en entornos distribuidos, minimizando así la necesidad de servidores centralizados. Bajo esta premisa nació el protocolo RELOAD, cuyo diseño se ha generalizado para permitir otras aplicaciones con similares exigencias, y que actualmente está en proceso de normalización por el IETF. El objetivo de este Trabajo Fin de Grado es realizar una implementación de referencia de dicho protocolo, debido al gran interés mostrado en los últimos años por la comunidad científica y empresarial en los asuntos relacionados con las redes peer-to-peer. En este proyecto se ha implementado una parte relevante de RELOAD. Para ello, en primer lugar, se ha realizado un diseño orientado a objetos basado en un subconjunto funcional del nuevo estándar RFC 6940 y, posteriormente, se ha llevado a cabo la codificación, poniendo énfasis en la sencillez del código, de manera que la aplicación pueda modificarse y reutilizarse con facilidad. Finalmente, se han realizado y documentado pruebas, cuyo propósito ha sido demostrar el correcto funcionamiento en escenarios reales utilizando una implementación previamente existente de SIP.Ingeniería Telemátic

RELOAD/CoAP architecture for the federation of wireless sensor networks

Sensing devices are expected to interconnect over large geographical areas and federations of wireless sensor networks are expected in a near future. In such environments a critical issue is how to discover the resources available at devices in a scalable manner. For this purpose, a Constrained Application Protocol (CoAP) Usage for REsource LOcation And Discovery (RELOAD), a generic self-organizing Peer-to-Peer (P2P) overlay network service, has been defined to be used as a lookup service, to store available device resources and as a cache for sensor data. Each P2P resource, at the RELOAD/CoAP overlay, includes references to device resources, hosted at one or more constrained nodes, but no provision is made for the insertion of bindings/references to P2P resources already available at the P2P overlay network. Such feature would increase the efficiency and consistency of storage, avoiding duplicate references, a very relevant issue for future IoT applications relying on the federation of wireless sensor networks. In this article an extension to the service provided by CoAP Usage is proposed so that resource bindings can be managed. Two binding models, and a heuristic algorithm for their implementation, are proposed. Results show that such models lead to a better resource organization, reducing the number of sensor resource entries and/or fetches to the P2P overlay.FCT (Foundation for Science and Technology) from Portugal within CEOT (Center for Electronic, Optoelectronic and Telecommunications) [UID/MULTI/00631/2013]info:eu-repo/semantics/publishedVersio