Francisco Javier González-Cañete

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Mobile Ad Hoc Networks (MANETs) are strongly impacted by the mobility of the ad hoc nodes. Mobility models help engineers to abstract the changes of position in network users. Different mobility models have already been proposed to characterize the behaviors of mobile devices that are greatly correlated to the conditions of the possible scenarios where(More)
Some ad hoc protocols allow the discovery and/or storage of multiple routes to the same destination node. The selection of the path to utilize is commonly based on the criterion of the minimum number of hops. However, other strategies could be more appropriate to improve the network performance. In this sense, this paper proposes the criterion based on the(More)
This paper describes the behaviour of individual Web users as well as aggregate HTTP traffic basing on actual traces taken from a transoceanic link between Japan and USA. The proposed model characterises the traffic at different levels, ranging from packets to Web pages. Thus, the study investigates the effects of aggregation on the heavy-tailed nature and(More)
Some reactive ad hoc protocols allow the discovery and/or storage of multiple paths to the same destination node. The selection of the path to utilize is commonly based on the criterion of the minimum number of hops. However, some other strategies could be appropriate to improve the network performance. In this paper, we intend to minimize the load in the(More)
In this paper, we describe a caching scheme for ad hoc networks. In this proposal the wireless nodes implement a local cache so that consecutive requests to the same document can be served directly by their own local cache instead of accessing the remote server. The nodes can also intercept the forwarding requests and serve the documents requested directly(More)
In this paper, a study of the performance of six replacement policies has been developed. Three of them are classical caching algorithms (LRU, LFU and LFU-DA) while the other three are caching schemes specifically developed for Web documents (GO-SIZE, GDSF and GD*). This study has been divided by the main content-types observed in Web traffic (application,(More)
In this paper, we describe a Windows based Web cache simulator tool. This tool is able to process the IRCache based traces files and reproduce the behavior of a Web Proxy Cache. It can be configured to simulate fifteen replacement policies and two admission control policies. The cache size, the percentage of warm-up and the cost function of some replacement(More)
In this paper, we describe and evaluate the performance of a caching scheme for ad hoc networks. In this proposal the wireless nodes store the documents they request in a local cache and they can also work as a server for the other wireless nodes if they intercept the forwarding requests and serve the documents requested directly using their local cache. On(More)
Most of the proposed mechanisms that integrate MANETs into the Internet utilize a dedicated entity acting as the Internet Gateway. This demand prevents MANET from operating in scenarios prepared for one-hop wireless LAN where a Gateway is not pre-installed. One possible solution is described in the mobile multi-gateway support that temporally transfers the(More)
This paper presents a comparison of the performance of seven randomized replacement policies proposed for Web caching (RAND, HARMONIC, LRU-C, LRU-S, CLIMB-C, CLIMB-S and RRGVF) and the classical LRU scheme widely used in Web proxy caches. This comparison is performed using a Web cache simulator that implements the aforementioned replacement policies and(More)