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Evaluation of CRTP performance over cellular radio links

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4 Author(s)
M. Degermark ; Lulea Univ. of Technol., Sweden ; H. Hannu ; L. Jonsson ; K. Svanbro

To make mobile IP telephony over cellular radio systems an economically viable alternative to circuit-switched voice, it is an absolute requirement that the 40-octet IP/UDP/RTP headers on IP telephony packets be reduced in size to conserve bandwidth and radio spectrum. We evaluate the performance of the default header compression scheme for IP/UDP/RTP, CRTP (RFC-2508), over links built on cellular radio access technology. We find that CRTP does not perform adequately over such links, and suggest that a more robust header compression scheme must be developed to make IP telephony over cellular economically viable

Published in:

IEEE Personal Communications  (Volume:7 ,  Issue: 4 )