In this paper, we investigate the problem of designing the mobile elements tours such that the length of each tour is below a per-determined length and the depth of the multi-hop routing trees bounded by k. The path of the mobile element is designed to visit subset of the nodes (cache points). These cache points store other nodes data. To address this problem, we propose two heuristic-based sol...

Wireless sensor networks (WSNs) consist of number of tiny, low cost and low power sensor nodes to monitor some physical phenomenon. The major limitation in these networks is the use of non-rechargeable battery having limited power supply. The main cause of energy consumption in such networks is communication subsystem. This paper presents an energy efficient Cluster Cooperative Caching at Senso...

The paper aims on how efficiently the performance of cache memory can be maintained in disturbed network and also in P2P networks. A Technique of distributed cache invalidation mechanism (DCIM), it is client-based cache consistency scheme is implemented on top of a previously existing architecture, namely COACS, here in COACS a special nodes cache the queries and the addresses of the nodes that...

Peer-to-Peer (P2P) video caching is a promising approach to accommodate asynchronous requests from cached content at individual peers. However, coherently managing a distributed, heterogeneous, dynamic and potentially large scale cache space is a challenging task. In particular, a key challenge is to effectively control the number of cached copies for popular streams in order to accommodate the...

The high bandwidth and the relatively long-lived characteristics of digital video are key limiting factors in the wide-spread usage of streaming content over the Internet. The problem is further complicated by the fact that video popularity changes over time. In this paper, we study caching issues for a cluster-based streaming proxy in the face of changing video popularity. We show that the cac...

A Video-on-Demand system (VoD) [1] integrates the entertainment, telecommunication, and computer industries and provides electronic video rental services to geographically dispersed users from remote video servers on a broadband network. Several techniques have been proposed to increase the number of concurrent viewers of popular movies through better usage of resources. One technique uses the ...

One of the largest challenges in client-side caching in extremely large-scale environments is consistency and coherency. By handling a user-space cache, we can offer applications much closer control over our client-side cache and scale the cache with the size of the compute resources (i.e. compute nodes). Cache data is shared among each compute node analagous to a traditional shared memory mach...

Recent advances in mobile computing and wireless technologies resulted in the emergence of new services such as Video-on-Demand. However, high rates of disconnection, low bandwidth, and other problems still strongly affect the quality of such services. To address some of these challenges, we propose a new model for the caching of video content that takes advantage of the cooperation among distr...

In this paper, large-scale content-centric mobile hybrid networks consisting of mobile nodes and static small base stations (SBSs) (or static helper nodes) are studied, where each node moves according to the random walk mobility model and requests a content object from the library independently at random according to a Zipf popularity distribution. Instead of allowing access to content objects ...