Dsti/iccp/cisp(2007)2/final
Figure 2. The convergence model
Yüklə 1,26 Mb. Pdf görüntüsü
|
- Bu səhifədəki naviqasiya:
- Switched Networks Circuit switched Networks Broadcasting
|
Figure 2. The convergence model
IP-based networks ISPs Telecom operators Broadcasters Internet Commercial Model Telecom Commercial Model Packet Switched Networks Circuit switched Networks Broadcasting networks Innovation without permission Innovation with international agreement Battleground Market convergence Technological convergence
http://www.oecd.org/document/12/0,3343,en_2649_34223_37392780_1_1_1_1,00.html. The telecommunications tradition emphasises the benefits of higher capacity local fibre access facilities, and powerful network intelligence. Access in this context should be simple and reliable, with
DSTI/ICCP/CISP(2007)2/FINAL
18 centralised network management and control to guarantee the seamless provision of a wide range of services, bundled network-content-applications offers, and one-stop shop solutions. On the other hand, the Internet world traditionally focuses on edge innovation and control over network use, user empowerment, freedom to choose and create applications and content, open and unfettered access to networks, content, services and applications. Freedom at the edges is considered more important than superior speed of managed next generation access networks. Indeed, the “Internet” still represents different things to different people, and next generation networks are seen as both a possibility for improved services or as a way to constrain the Internet into telecommunication boundaries, adding new control layers, capable of discriminating between different content, and “monetise” every single service accessed. Services provided over next generation networks allegedly will differ from services currently provided over the public Internet which is based on a “best effort” approach, where the quality of transmission may vary depending on traffic loading and congestion in the network, while with NGN packet delivery is enhanced with Multi Protocol Label Switching (MPLS). This allows operators to ensure a certain degree of Quality of Service – similar to the more constant quality of circuit switched networks – through traffic prioritisation, resource reservation, and other network-based control techniques, as well as to optimise network billing as in circuit-switched transport. 41
The concept of network-based control seems to be the main difference between the public Internet approach and next generation managed IP networks approach. NGN offers the possibility to provide a detailed service control and security from within the network, so that networks are aware of both the services that they are carrying and the users for whom they are carrying them, and are able to respond in different ways to this information. In contrast, the Internet aims to provide basic transmission, remaining unaware of the packets/services supported. While the Internet model remains therefore completely open to users and new applications and services, in managed IP networks operators are able to control the content going through the network. 42 In turn, this may have negative implications for the content of third party providers if their traffic is discriminated against in relation to that of an integrated operator. Yüklə 1,26 Mb. Dostları ilə paylaş:
|