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ROCCO and CRTP over WCDMA Air Interface – Field Trial Results

ROCCO and CRTP over WCDMA Air Interface – Field Trial Results. A Joint Ericsson-Japan Telecom Research Cooperation Krister.Svanbro@ericsson.com. Background. Evaluations have been made previously of CRTP and ROCCO over simulated WCDMA air interfaces.

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ROCCO and CRTP over WCDMA Air Interface – Field Trial Results

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  1. ROCCO and CRTP over WCDMA Air Interface – Field Trial Results A Joint Ericsson-Japan Telecom Research Cooperation Krister.Svanbro@ericsson.com

  2. Background • Evaluations have been made previously of CRTP and ROCCO over simulated WCDMA air interfaces. • It is always good to get simulation results verified with ”real-life” field trials. • With field trials it is also possible to gain practical experience which may help in algorithm development. • A field trial was performed in Chiba, Japan, in July on Japan Telecoms WCDMA experimental system. The field trial tested CRTP and ROCCO over the WCDMA air interface.

  3. Speech Content Application Layer Transport Layer Network Layer Compr No Compr Datalink Layer Scenario Enc. speech 32 bytes RTP 12+32=44 UDP 8+12+32=52 IPv4 20+8+12+32=72 2+32=34 40+32=72 PPP 72+6=78 6+34=40 Mobile ISDN TA Fixed ISDN TA WCDMA Experimental System

  4. Test Environment

  5. Stationary Mobile Terminal Packet Loss Mean Header Size

  6. Moving Mobile Terminal Packet Loss Mean Header Size

  7. Consecutive Packet Loss Distribution

  8. Summary • A field trial has been made in Chiba, Japan, in July which tested the performance of ROCCO and CRTP over a WCDMA air interface. • The results from the field trial basically just underlined previously made simulations. • E.g. the characteristics of header size, packet loss rate and consecutive packet loss distribution were as in simulations. • More detailed information of the field trial may be made available at a later date.

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