This paper deals with the use of proxy servers to cache streaming video objects. In this paper, we describe a streaming architecture for layered video objects that uses the concept of layered caching. A new replacement policy is proposed, which is based on the playout time of a video object at the client. We define a new quality metric that takes the number of layers as well as the importance o...

In this paper we present polishing, a novel technique to maximize the playback utility of a streamed layer-encoded video. Polishing reduces the amount of layer variations in a cached layer-encoded video before streaming it to a client if this increases the quality of the video. Polishing can also be used as a cache replacement strategy for removing the parts of layer-encoded videos on a cache t...

When asymmetric cryptography is used in wireless networks, public keys of the nodes need to be made available securely. In other networks, these public keys would have been certified by a certificate authority (CA). However, the existence of a single CA in large wireless networks such as mobile ad hoc networks and wireless sensor networks can lead to a communication hotspot problem and become a...

Cache Fusion TM is a fundamental component of Oracle’s Real Application Cluster configuration, a shared-cache clustered-database architecture that transparently extends database applications from single systems to multi-node shared-disk clusters. In classic shared-disk implementations, the disk is the medium for data sharing and data blocks are shipped between nodes through disk writes and read...

The design of a distributed video-on-demand system that is suitable for large video libraries is described. The system is designed to store 1000s of hours of video material on tertiary storage devices. A video that a user wants to view is loaded onto a video file server close to the users desktop from where it can be played. The system manages the distributed cache of videos on the file servers...

The design of a distributed video-on-demand system that is suitable for large video libraries is described. The system is designed to store 1000s of hours of video material on tertiary storage devices. A video that a user wants to view is loaded onto a video file server close to the users desktop from where it can be played. The system manages the distributed cache of videos on the file servers...

By deploying resources in the vicinity of users, edge caching can substantially reduce latency for users to retrieve content and relieve pressure on backbone network. Due capacity limitation dynamic nature user requests, how allocate reasonably must be considered. Some studies improve network performance by predicting popularity actively most popular content, thereby ignoring privacy security i...

We present the design and experiments from a testbed implementation of multi-source mobile video streaming that combines three mechanisms: 1) load balancing among different paths from multiple sources, 2) resilience to link and server failures, and 3) enhanced offloading by exploiting mobility and throughput prediction to prefetch video data in caches located at hotspots that the mobile will en...

Networked embedded systems typically leverage a collection of low-power embedded systems (nodes) to collaboratively execute applications spanning diverse application domains (e.g., video, image processing, communication, etc.) with diverse application requirements. The individual networked nodes must operate under stringent constraints (e.g., energy, memory, etc.) and should be specialized to m...

Mobile Ad hoc NETwork (MANET) comprises of nodes, which are free to move randomly, yet cooperate to forward packets between source and destination over a multi-hop wireless network. Due to absence of any fixed node, each node acts as a router, providing routing capability for the MANET. Various protocols for discovery of routes between any two MANET nodes have been designed. These protocols are...