Project IEEE 802.20 Working Group on Mobile Broadband Wireless Access

<http://grouper.ieee.org/groups/802/20/>

Title 802.20 Traffic Models Update

Date Submitted

2004-01-05

Source(s) Farooq Khan 67 Whippany Road Whippany, NJ 07981

Voice: +1 973 386 5434 Fax: +1 973 386 4555 Email: fkhan1@lucent.com

Re: MBWA Call for Contributions: Session # 6 – January 12-16, 2003

Abstract This contribution summarizes the status of 802.20 traffic models group activities.

Purpose Review and Adopt

Notice This document has been prepared to assist the IEEE 802.20 Working Group. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.

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802.20 Traffic Models Update

Farooq Khan

IEEE 802.20 Interim Meeting

Vancouver, BC, Canada

January 12-16, 2004

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C802.20-04/20Traffic Models Status

• Once conference call (12/2) since the November Plenary

• The discussion focused on the following items:– Specification of traffic mix

– Higher layer protocol models

– FTP traffic model

– Full buffers (Infinite backlog) model

– Mobile station buffer size considerations

– VoIP Traffic model

– Wireless multi-party Gaming traffic model

– User scenarios

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C802.20-04/20Specification of traffic mix

• Traffic modeling group foresees scenarios where various traffic types are simulated simultaneously.

• Currently only a list of traffic types is provided

– Issue of percentage of various traffic types in a mixed scenario is still open.

• Contributions invited on possible traffic mix scenarios (percentage of different traffic types) and potential phases of simulations etc.

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C802.20-04/20Higher layer protocol models

• Input on higher layer protocols for applications other than web browsing.

• For web browsing application, the consensus is to use HTTP/1.1 protocol.

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C802.20-04/20FTP traffic model

• The group discussed if the current model is a realistic representation of an FTP user behavior in practice.

• In particular, it was questioned if "think time" applies to the FTP model the same way as the web browsing model.– For FTP, another request can be generated while the

previous file is downloading in the background.

• Contributions on whether we need to modify the existing FTP traffic model.

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C802.20-04/20Full buffers model

• Full buffers is currently not considered as a traffic type

• Input on whether we need to include a simulation case with Full buffers traffic only.

– For example, a first stage simulation for “calibration” purposes.

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C802.20-04/20Mobile station buffer size

• The group discussed if the mobile station buffer size limitations need to be considered in the evaluation phase.

• Two options were pointed out:– Adding a maximum buffer size constraint or

– Allowing infinite buffer size with average and distribution of buffer occupancy collected as output metrics.

• It was also mentioned that requirements on delay and jitter may already capture the buffer limitation aspect and it is not necessary to include any buffer size constraint separately.

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C802.20-04/20VoIP Traffic model

• VoIP is one of the traffic types to be simulated in the 802.20 evaluation.

• Currently, there is no model specified for the VoIP traffic.

• Contributions are invited on potential VoIP models suitable for 802.20 air-interface evaluation.

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C802.20-04/20Wireless Gaming traffic model

• Wireless multi-party wireless gaming is an important application that needs to be considered in 802.20 system evaluation.

• Input required on mobile wireless gaming models.

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C802.20-04/20User scenarios

• The group discussed if:– all the user scenarios (Laptop, PDA, Smart phone,

machine-to-machine) need to be considered or

– only a subset of the user scenarios can be simulated.

• In order to capture different user scenarios, parameters values of some traffic models (e.g. web browsing) would be adapted to the user scenario– For example, heavy, medium or light web browsing

application.