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Design of an ATM-based multimedia network
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lierop, Van Jj Jeroen |
| Copyright Year | 1995 |
| Abstract | The appearance of new (multimedia) networking applications, such as video conferencing, bring about requirements for networks that cannot be met by the current telecommunication and datacommunication infrastructures. Therefore, a new multimedia networking solution is required that supports these multimedia applications and can also replace the above mentioned infrastructures by supporting their services. In the long run, a single Broadband Integrated Services Digital Network (B-ISDN) will exist that supports all services mentioned above. This network will make use of an efficient switching technique, called Asynchronous Transfer Mode (ATM), that combines efficient bandwidth utilization with quality of service guarantee and the support of multiple bit-rates. Until the B-ISDN is fully operational, multimedia networks will only exist in local and metropolitan areas. Since these networks have similar requirements and need to be interconnected with the B-ISDN in the long run, ATM is a very suitable technique for these networks as well. A customer premises multimedia network typically comprises a set of ATM end-systems, a set of ATM switches and means to interconnect them (interfaces). It is believed that the following features increase the value of an ATM-based multimedia networking solution: • Ethernet LANs are connected to the switches without interworking units. The switches are capable of acting like a LAN bridge thereby simultaneously supporting ATM and Ethernet. • The switches internally contain a bus structure that allows easy broadcasting. This facilitates the interconnection of LANs and the implementation of LAN emulation, a service that supports LAN interconnection and the use of LAN applications by emulating virtual LANs (VLANs). • The network contains an embedded clock distribution facility that allows it to support both isochronous and asynchronous services without expensive resynchronisation and delay compensation. • The switches in the network are typically group-switches that do not need huge amounts of bandwidth. Therefore, the architecture of the switches may be relatively simple, which may significantly lower the cost. • By reducing the bit-rate to the end-user, the cost of the interfaces may also be reduced. The architecture that has been presented in this report, provides a scalable network built with switches that internally use a high speed TDM-bus, named "Autobahn". This bus provides a means to switch reasonably high bit-rates (currently up to a total of 1.6 Gbits/s per switch) with a relatively low complexity. Furthermore, it facilitates the implementation of multicast and broadcast, thereby making it an excellent solution for LAN interconnection. The switches internally use synchronous time-slot assignment, which facilitates the implementation of isochronous services. VLANs are implemented by means ofmultipoint-to-multipointPermanent Virtual Connections (PVCs), thereby creating virtual shared media. This allows the ATM network to function as a LAN bridge without having to set up a large number of ATM connections. Furthermore, the multicast server is distributed over the switches, so that separate multicast servers are |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://pure.tue.nl/ws/files/46974936/673153-1.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
