project: ieee 802.15 working group for wireless personal area networks (wpans)

September 2000

Allen Heberling,Eastman Kodak Company1

Doc:IEEE 802.15-00/292r0

Submission

Project: IEEE 802.15 Working Group for Wireless Personal Area Networks (WPANs)Project: IEEE 802.15 Working Group for Wireless Personal Area Networks (WPANs)

Submission Title: [TG3 MAC Criteria Pugh Matrix Evaluation Results ]

Date Submitted: [17 September, 2000]

Source: Name [Allen Heberling, Chairperson for TG3 MAC-subcommittee ]

Company [Eastman Kodak Company]

Address [4545 E. River Road, Rochester, NY 14650-0898]

Voice:[716-781-9328], FAX: [716-781-9733], E-Mail:[[email protected]]

Re: []

Abstract: [Review of TG3 MAC criteria evaluation process and the results of same. ]

Purpose: [To report the results of the TG3 MAC subcommittee’s evaluation of the MAC criteria pugh matrix]

Notice: This document has been prepared to assist the IEEE 802.15. 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.

Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by 802.15.

September 2000


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TG3 MAC Criteria Pugh Matrix Evaluation Results

September 2000


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Overview

• TG3 MAC Proposers and Proposals

• References Used

• Review Process

• Results

• Analysis of Results

• Conclusions

• Recommendations

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MAC Subcommittee Participants

• Proposers– Marc de Courville– Walter Davis/Rajugopal Gubbi– Allen Heberling– Pat Kinney/ Joe Kubler– Carlos Rios– David Skellern

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TG3 MAC Proposals

• Davis: doc: 208r1 and 209r1

• de Courville doc: 128r0

• Heberling: doc: 212r0 and 213r1

• Kinney: doc: 208r0 & 218r0

• Rios: doc: 197r1 & 198r2

• Skellern: doc: 196r0 & 196r1

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Additional Documents

• Doc: 110r(11&12) TG3-Criteria-Definitions• Doc: 245r8 TG3-Proposal-Evaluations

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Review Process

• Proposers submitted MAC criteria Pugh Matrix Self Evaluation sheets

• Data were entered into MAC subcommittee’s MAC criteria work sheet in doc: 245rx

• Proposers and other interested parties participated in weekly teleconference calls which started 8/2 and concluded 9/15.

• Participation averaged 17 802.15 members per call.

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Review Process Continued

• Purpose of MAC subcommittee conference-calls:– to provide peer review challenges to each

proposer’s MAC criteria self evaluation ratings.

– To reach consensus by the subcommittee regarding which value should be assigned to each proposer’s MAC criterion evaluation.

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• To provide clarifications to the MAC criteria definitions defined in doc: 110r11.For Example: MAC subcommittee identified

criteria that were:• PHY dependent,

OR • Partially defined.

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• MAC subcommittee identified these criteria as Phy dependent:

– Multiple Access

– Location Awareness

– Minimum Delivered Data Throughput– Maximum Delivered Data Throughput

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• MAC subcommittee identified these criteria as partially defined:

– Simple Network Join/Unjoin Procedures

– Device Registration

– Power Management types

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• Examples of MAC criteria partially defined continued:

– Authentication

– Privacy

– Quality of Service

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Results of the MAC Criteria Pugh Matrix Review Process

• M. de Courville withdrew his advocacy for a HiperPan MAC for 15.3.

• Proxies R. Gubbi & G. Parks modified the W. Davis proposal for an adaptive TDMA access algorithm, to align with the “15.1 Reuse” concept

• D. Skellern modified his MAC proposal to align with the 15.1 Reuse Concept and the Davis adaptive TDMA access algorithm.

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Results of the MAC Criteria Pugh Matrix Review Process continued...

• The number of MAC proposals reduced from 6 to 4.– Davis/Skellern– Heberling– Kinney– Rios

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• Two of the proposals(Davis/Skellern & Heberling) advocate “Reuse of 15.1” and the addition of either – the Heberling proposed adaptive TDMA access

algorithm

OR– the R. Gubbi proposed adaptive TDMA access

algorithm per the Davis/Skellern MAC proposal.

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15.1Reuse MAC Architecture

802.15.1 Reuse MAC Layer

PHY Layer

802.15.1Reuse

L2CAP

802.15.1Reuse MLME

w/QoS extensions

Rx_signalTx_signal

802.15.1 Reuse Base band*

PLCP

PMD

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Link ControllerACL Process

802.15.1 TDMAAlgorithm

Heberling or

Davis/Skellern/Gubbi Adaptive TDMA

Algorithm

PMD

PLCP

Potential 802.15.1 BasebandReuse decomposition

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• The other two proposals(Kinney & Rios) advocate a dual MAC architecture in which 15.1 shares a MAC processor with either:– an 802.11 “Like” MAC(Kinney)

OR– an 802.11 MAC(Rios) w/ TGe MAC

enhancements

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Kinney Dual MAC Architecture

L2CAP 802.15.1 MLME

Rx_signalTx_signal

802.15.1 BaseBand

PLCP

PMD

Kinney MLMEKinney MACData Service

Rx_signalTx_signal

802.11 Like DCF w/ CSMA&

RTS/CTS signals

PLCP

PMD

Kinney 802.11Like

MAC

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Rios Dual MAC Architecture

L2CAP 802.15.1 MLME

Rx_signalTx_signal

802.15.1 BaseBand

PLCP

PMD

802.11 MLME802.11 MACData Service

Rx_signalTx_signal

802.11DCF/PCF w Tge Enhancements

PLCP

PMD

Rios 802.11 MAC

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802.15 re-use 802.15 re-use 802.11 "like 802.11 "likePresenter/Doc Owner Heberling Davis/Skellern Kinney Rios

Proposal Type MAC MAC MAC MAC (--1)PPT/Doc 212r0/213r0 196r3 205r1/218r0 197r2/198r2 Same (0)

Criteria Criteria WEIGHTS (+1)2.1 Unit Manufacturing Cost 8.0 1 1 1 0 8.0 8.0

2.2.5 Multiple Access 7.5 1 1 1 1 7.5 7.5

2.3 Interoperability 7.2 0 0 0 0 0.0 0.0

2.4.1 Manufactureability 7.0 1 1 1 1 7.0 7.0

2.4.2 Time to Market 5.7 1 1 1 1 5.7 5.7

2.4.4 Maturity of Solution 5.2 1 1 1 1 5.2 5.2

2.5 Scalability 4.9 1 1 1 1 4.9 4.9

2.6 Location Awareness 4.1 0 0 0 0 0.0 0.0

0.0 0.0

3.1 Transparent to Upper Layer Protocols (TCP/IP) 7.2 0 0 0 0 0.0 0.0

3.2.1 Unique 48-Bit Address 5.4 0 0 0 0 0.0 0.0

3.2.2 Simple Network Join/UnJoin Procedures 7.3 0.0 0.0

3.2.3 Device Registration 5.8 0.0 0.0

3.3.2 Minimum Delivered Data Throughput 7.6 0 0 0 0 0.0 0.0

3.3.3 High End Delivered Data Throughput 6.4 0 0 0 0 0.0 0.0

3.4 Data Transfer Types 5.5 1 1 0 1 5.5 5.5

3.5.1 Topology 4.7 1 1 1 1 4.7 4.7

3.5.2 Maximum Number of Active Connections 5.6 1 1 1 1 5.6 5.6

3.5.3 Ad Hoc Network 6.4 0 0 0 0 0.0 TRUE

3.5.4 Access to a Portal 5.3 0 0 0 0 0.0 0.0

3.6.2 Master Redundancy 3.0 0 0 0 0 0.0 0.0

3.6.3 Loss of Connection 5.7 0 0 0 0 0.0 0.0

3.7 Power Management Types 5.4 0 1 1 1 0.0 5.4

3.8 Power Consumption of MAC Controller 6.7 0 0 0 0 0.0 0.0

3.9.1 Authentication 6.7 0 0 0 0 0.0 0.0

3.9.2 Privacy 6.8 0 0 0 0 0.0 0.0

3.10 Quality of Service 6.2 1 1 -1 1 6.2 6.2

Total -'s 0 0 1 0

Total 0's 14 13 14 14

Total +'s 10 11 9 10

LEGEND

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Analysis of Results

• MAC subcommittee still needs to clarify and evaluate these MAC criteria:– Simple Network Join/Unjoin procedures– Device registration

• Pugh Matrix Summary indicates that all 4 proposals are close in their unweighted evaluations.

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Analysis of Results continued...

• Pugh Matrix results indicate that distinctions among the 4 MAC proposals become apparent when the weighting factors are included.– Heberling proposal lost 6 points for having

a Power Management Type which was the same as 802.15.1

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Analysis of Results continued...

– Kinney proposal lost 5.5 weighted points for Data Transfer Types and 6.2 weighted points for not providing sufficient support for QoS.

– Rios proposal lost 8 weighted points for Unit Manufacturing Cost.

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Conclusions

• The Pugh Matrix process provided a framework within which to:– evaluate the submitted MAC proposals– challenge each MAC proposer’s self

evaluation criteria ratings– identify criteria needing clarification– identify criteria which are dependent upon

MAC/PHY pairings

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Conclusions

The MAC proposals have been reduced to two classes:

• an 802.15.1 Reuse with the addition of – the Heberling proposed adaptive TDMA access

algorithm

OR– the R. Gubbi proposed adaptive TDMA access

algorithm per the Davis/Skellern MAC proposal.

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Conclusions

• Dual MAC architecture in which 802.15.1 MAC shares MAC processor resources with either – an 802.11 “Like” MAC

OR – an 802.11 MAC w/ TGe multi-media

enhancements