Cell Utilization Efficiency of Internet Protocol Traffic over Asynchronous Transfer Mode Networks
In the near future, large computer networks will be connection oriented, with at least the data link connectivity being provided by the Asynchronous Transfer Mode. (ATM) networks. However, these networks may have to communicate with the existing network which predominantly use Internet Protocol...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English English |
| Published: |
1996
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/9991/1/FK_1996_5_IR.pdf http://psasir.upm.edu.my/id/eprint/9991/ |
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| Summary: | In the near future, large computer networks will be connection oriented,
with at least the data link connectivity being provided by the Asynchronous
Transfer Mode.
(ATM) networks. However, these networks may have to
communicate with the existing network which predominantly use Internet
Protocol (IP). Running Internet Protocol over Asynchronous Transfer Mode
Network has been a contentious issue due to the inefficient segmentation of
Internet Protocol packets into Asynchronous Transfer Mode (ATM) cells. In
this thesis, the current protocols and standards pertaining to Internet
Protocol over Asynchronous Transfer Mode are discussed and overheads
involved in placing Internet Protocol packets into Asynchronous Transfer
Mode cells, taking Logical Link Control/Sub Network Attachment Point
Encapsulation into consideration, are analysed to find out the cell utilization
of Asynchronous Transfer Mode cell in carrying the Internet Protocol
packets. The Wide Area Network (WAN) oriented traffic for our analysis is
collected from the Internet Traffic Archive. Analysis of the trace results show that the Asynchronous Transfer Mode
cell utilisation is better in carrying the user information if the Internet
Protocol packet are sizes larger. It is observed that ranges of Internet
Protocol packets require similar number of Asynchronous Transfer Mode
cells. At small values of Internet Protocol packets, the efficiency of
Asynchronous Transfer Mode cell in carrying the user information is
significantly low due to the Logical Link Control Encapsulation, padding and
the trailer overheads. The Asynchronous Transfer Mode Cell utilization is
better in Virtual Circuit (VC) based multiplexing, saving 8 bytes of
encapsulation for each packet, thus improving the Asynchronous Transfer
Mode (ATM) cell utilization marginally. It is seen that 80% of the Internet
Protocol packet length varies from 54 to 200 bytes for which cell utilisation
varies from 50%-to 82%. However, the average cell utilisation is 84% in the
20,000 packets observed since 20% of the Internet Protocol packet length is
greater than 1000 bytes. |
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