Applying multiple description coding to enhance the streaming scalability on CDN‐P2P network

SUMMARYDue to increasing bandwidth capacities, the Internet has become a viable transport medium for a (live) video. Often, delivery of video streams relies on the client-server paradigm and therefore exhibits limited scalability. The Peer-to-Peer (P2P) network model is an attractive and scalable candidate to stream video content to end users. However, these P2P frameworks typically operate in a network agnostic mode. Introducing network topology information into these P2P frameworks offers opportunities to enhance the performance. In this paper, we introduce a model to include network information when streaming a (multilayered) video in P2P frameworks. An important metric for video stream providers is the content quality perceived by end users. The optimization studied here aims at maximizing the number of users receiving a high quality video. The paper addresses the optimization problem seen from the stream provider's viewpoint, having access to network topology information. An exact optimization approach is presented for benchmarking purposes and a heuristic approach to cope with realistic network sizes. In addition, we present an approach to decide the deployment location of peering functionality. The results show that our strategy significantly decreases the fraction of destinations receiving only the base layer, and by introducing extra peering functionality, network capacities are used more efficiently.

Section: Solving Our Problem On a Tree-video Distribution Networkmentioning

confidence: 99%

Section: Solving Our Problem On a Tree-video Distribution Networkmentioning

confidence: 99%

Using topology information for quality‐aware Peer‐to‐Peer multilayer video streaming

Sluijs

Wauters

Develder

et al. 2015

“…By preventing the prefixes announced by edge networks from entering core networks, global routable prefixes in the core network can be greatly reduced. On the other side, with increasingly voluminous and dominant video traffic provided by multimedia content providers, and effective support for multimedia content with end devices especially for mobile devices [4], efficient support for delivering such content becomes a challenging problem and various content dissemination schemes based on the current Internet architecture, such as content distribution network (CDN) and peer to peer, have been proposed [5,6]. In addition to this, for better supporting content delivery, the network resources are expected to be utilized more efficiently [7], and information centric networking architecture has recently been proposed [8,9].…”

Section: Introductionmentioning

confidence: 99%

Optimizing content routers deployment in large‐scale information centric core‐edge separation Internet

Chen

Zhang

Zhou

et al. 2013

SUMMARYIn this paper, we investigate the optimization of content router deployment in large-scale information centric core-edge separation Internet. We formulate the target cost function, which captures the trade-off between the cost for traffic transmission and cost due to additional deployment of content routers. To solve the problem, we first derive the analytical results of traffic ratio and its closed-form approximation. We then construct a convex optimization problem, from which the optimal deployment probability can be solved. By extensive numerical results, the accuracy of the closed-form approximation of traffic ratio is demonstrated. And, it is found that the optimal deployment probability is decided by the average number of hops for obtaining the content, the cost for traffic transmission, and the cost of extending router to content router.

“…

As one of key differences from traditional Internet, information-centric networking introduces the network built-in cache in network nodes. As one of the key differences from traditional Internet, ICN introduces the cache in network nodes, although the cache issue is not a new topic and has been already widely studied by researchers in the field such as content delivery network and peer to peer [17][18][19][20][21]. In this paper, we try to look insight into such an issue and propose a way of cache collaboration not only for the on-path but also for the off-path routers.

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mentioning

confidence: 99%

An exploration of cache collaboration in information‐centric network

Feng

Zhou

Gao

et al. 2014

As one of key differences from traditional Internet, information-centric networking introduces the network built-in cache in network nodes. It is not proper to analyze a cache node isolated from cache neighbors, especially for the named data network in which all network nodes can cache the content. In this paper, we try to look insight into such an issue and propose a way of cache collaboration not only for the on-path but also for the off-path routers. The autonomous cache is not efficient and cache routers are required to guarantee the time of the cached content for the stability as well as the reliability. Therefore, we firstly introduce an interest counter, on one hand, to rank different contents within a period, in this way, we can use the advantage of the least frequently used (LFU) as well as avoid its cache pollution problem, on the other hand, to reduce the rate of content replacement and to maintain a relative stability in forwarding plane, thus, the cached content can be easily managed by the control plane. Secondly, we utilize the interestprune and the steady content advertisement mechanism in the control plane based on the interest counter in order to eliminate the duplicated cached content along en-route routers and cache neighbors, as a result, more cache capacity for different contents can be saved and efficient cache collaboration can be obtained. We evaluate the performance of our scheme in line, tree and grid topology scenarios. The simulation results show that our scheme performs well compared with the perfect-LFU, the LFU, the random, and least recently used replacement policies. that is, to efficiently retrieve and distribute data. The related issues include the architecture design, the security, the cache and so on [11][12][13][14].Our previous works focused on the security issue [15] and the optimization of content routers deployment [16] in ICN, whereas in this paper, we explore the cache collaboration issue. As one of the key differences from traditional Internet, ICN introduces the cache in network nodes, although the cache issue is not a new topic and has been already widely studied by researchers in the field such as content delivery network and peer to peer [17][18][19][20][21]. The previous cache schemes are always application-dependent and deployed as an overlay network, which is inefficient to share the data with the intermediate nodes and suffers from drawbacks caused by the IP dual-roles binding. However, caching in ICN is ubiquitous, application-agnostic and network-aware, making it more open, dynamic, and flexible. Spot contents can be cached everywhere and shared by any network nodes, thus bringing advantages such as the traffic alleviation on the original server and the nearest data copy obtained by consumers. However, because the development of ICN is still in its early stage, more details including the cache issue should be considered carefully, and there is still a long way to go.Because network nodes can cache the content, especially for the NDN in which all nodes partic...