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Core Network and Operational Support System
Published in Saad Z. Asif, 5G Mobile Communications Concepts and Technologies, 2018
CDN improves the performance of networks by moving content closer to the end user. Some cases where CDN can make a difference are as follows [34]: As an Application Optimization Engine, CDN can optimize the amount of data being sent while increasing the utilization of available user bandwidth. Moreover, as CDNs connect the user to the geographically closest server, the net effect is in latency reduction introduced by the network. Such engines handle optimization at various networking levels to speed up the delivery of content to all types of users.As a file replicator, particularly when large data files are required at multiple geographies, CDNs can replicate data from a corporate headquarters in one region to one or more regional headquarters in a timely manner.As an ultimate bandwidth source, CDNs can be used to mitigate the effect of high volume, bursty, and ill-defined traffic growth, and keep the application performance at an acceptable level.
QoE-Based Routing for Content Distribution Network Architecture
Published in Hassnaa Moustafa, Sherali Zeadally, Media Networks: Architectures, Applications, and Standards, 2016
Tran Hai Anh, Mellouk Abdelhamid, Hoceini Said
With the rapid growth and evolution of Internet today, the lack of a central coordination is critically important. However, without management makes it very diffi-cult to maintain proper performance. At the same time, the Internet utilization and the accelerating growth of bandwidth intensive content continue to overpower the available network bandwidth and server capacity. The service quality perceived by end users is accordingly largely unpredictable and unsatisfactory. One proposes Content Distribution Network (CDN) as an effective approach to improve Internet service quality [1,2]. CDN replicates the content from origin servers and serves a request from a replica server close to requested end users. As CDN service includes two important operations: (1) Replica server selection used to select an appropriate replicated server holding the requested content and (2) Data routing used to choose the best path to serve data to the end user, we focus our attention in a first part to give a brief overview of CDN. We then present the content delivery processes including sever selection and data routing method in a second part.
15 Internet Video
Published in Wes Simpson, Video Over IP, 2013
There are some differences, of course. An Internet video server has a fixed public IP address that is made visible to the World Wide Web and is accessible to any connected user. Content-delivery networks (CDNs) can be used to assist in the delivery of files, particularly for popular websites with large amounts of traffic that could easily overwhelm even a high-capacity web server. Instead of a program guide that many private video systems provide, users can browse for content by going to a suitable search engine or simply click on links embedded in information sources they trust. Web browsers with video decoding plug-ins are used in place of stand-alone viewing software. Figure 15-2 shows a more complex view of an Internet video system.
In-network caching in information-centric networks for different applications: A survey
Published in Cogent Engineering, 2023
Conventionally, the content delivery techniques use the client-server model. However, moving the content from the original server to the edge of the Internet (known as local replica server) is a key solution, which has better performance in terms of lower access latency, higher data transfer rate, and less cost than the client-server model. Content distribution network (CDN) through IP multicast is a typical example to address the primary challenge of the Internet (Mosko, 2015). CDN distributes the content from the original server to the end-users through the replica servers that aim to solve the backbone network bottleneck and provide a better quality of service. The contents that are stored and served at replica servers are carefully selected so that the hit rate can approach 100% in some cases. That is to say, CDN can lead to short access delay, increase content distribution rate, and reduce network bandwidth usage significantly (Abu et al., 2014; Halloush et al., 2017; Urueña et al., 2017).
Intelligent resource management at the network edge using content delivery networks
Published in Enterprise Information Systems, 2023
M. Abbasi, M. R. Khosravi, A. Ramezani
In the edge network armed with CDN, CDNs cache the website content on a CDN so it is delivered from an edge server to the user faster than if it were to be delivered from the original content server. This lets the content demanded to travel from the nearest CDN node and back, instead of having to travel from the original content server and back.