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Doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 1 MAC Component Breakdown Topics for Discussion Date: 2008-07-15 Authors:

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Presentation on theme: "Doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 1 MAC Component Breakdown Topics for Discussion Date: 2008-07-15 Authors:"— Presentation transcript:

1 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 1 MAC Component Breakdown Topics for Discussion Date: 2008-07-15 Authors:

2 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 2 Abstract This presentation enumerates some MAC component breakdown topics for discussion and shows some examples breakdowns for the purpose of initiating deeper discussions.

3 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 3 Logistics Please view in slideshow mode to see the animations, which are an important part of the presentation.

4 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 4 Outline Introduction/ Caveats Component Breakdown vs. Function Breakdown WLAN System Architecture Example Breakdowns –Access Unit Device Breakdown Top level Component detail (drill down sequence) –802.11u_D3.0 STA Breakdown –Possible VHT Work Breakdown –Single Breakdown Step Terms Real-time Breakdown Work References

5 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 5 Introduction/ Caveats An illustration – for discussion catalyst purposes only. An example to demonstrate the architectural framework result that is desired. Represents a sample component breakdown. Not the only component breakdown approach or the best approach, just an approach. Purpose is to show the components within and the relationship between those components in a consistent architectural framework.

6 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 6 Component Breakdown Approach functional view vs. component view –functional view describes the functions without regard to any given component or architecture view (i.e. architecture independent) –component view is architecture dependent and can easily become device specific; therefore must strive to create an architectural component view Ultimately both views are required for a complete understanding.

7 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 7 802.11 WLAN System [1]

8 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 8 Remember Equivalent AP Syntax [1]

9 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 9 Non-802.11 LAN / AN Access Unit (device) STA 1 Access Unit component breakdown sequence from [3], 8/496r1

10 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 10 2 Non-802.11 LAN / AN STA Access Unit Portal DS AP ACM_STA Access Unit component breakdown sequence from [3], 8/496r1

11 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 11 3 Non-802.11 LAN / AN STA Access Unit Portal DS AP ACM_STA ACM_MAC PHY Access Unit component breakdown sequence from [3], 8/496r1

12 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 12 4 Non-802.11 LAN / AN STA ACM_MAC Access Unit Portal DS AP ACM STA PHY Data Handling Mgmt (inc. SSID) Data fwd Beacons/Probes Authen. CA/NAV CSMA MPDU CTRL MMPDU MLME/ SME MAC SAP PHY SAP Access Unit component breakdown sequence from [3], 8/496r1

13 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 13 5 Non-802.11 LAN / AN STA ACM_MAC Access Unit Portal DS AP ACM STA PHY Data Handling Mgmt (inc. SSID) Data fwd Beacons/Probes Authen. CA/NAV CSMA MPDU CTRL MMPDU MLME/ SME MAC SAP PHY SAP Data Movement: -Queues -Filters/Gating BSS Mgmt: -Association -SSID Medium Access and Control Access Unit component breakdown sequence from [3], 8/496r1

14 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 14 6 Non-802.11 LAN / AN STA ACM_MAC Access Unit Portal DS AP ACM STA PHY Data Handling Mgmt (inc. SSID) Data fwd Beacons/Probes Authen. CA/NAV CSMA MPDU CTRL MMPDU MLME/ SME MAC SAP PHY SAP Data Movement: -Queues -Filters/Gating BSS Mgmt: -Association -SSID Medium Access and Control BSS Identity = SSID MAC Identity = BSSID Access Unit component breakdown sequence from [3], 8/496r1

15 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 15 7 Non-802.11 LAN / AN STA ACM_MAC Access Unit Portal DS AP ACM STA PHY Data Handling Mgmt (inc. SSID) Data fwd Beacons/Probes Authen. CA/NAV CSMA MPDU CTRL MMPDU MLME/ SME MAC SAP PHY SAP Data Movement: -Queues -Filters/Gating BSS Mgmt: -Association -SSID Medium Access and Control BSS Identity = SSID Addressable (BSSID) Non-addressable Access Unit component breakdown sequence from [3], 8/496r1

16 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 16 STA Breakdown from 802.11u_D3.0

17 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 17 Possible VHT Work Breakdown 60 GHz PHY 60 GHz Lower MAC Upper MAC (management) <6 GHz PHY <6 GHz Lower MAC VHT60 scope VHTL6 scope Legend: Legacy Upper MAC modification for VHT60 and VHTL6 Legacy Lower MAC Legacy PHY Link-mgmt & session switch Link-mgmt & session switch The majority of the work between VHTL6 and VHT60 can be independent (since the PHY and lower MAC is tightly coupled per band). There will be some overlapping MAC work between VHT60 and VHTL6. Illustrative example only, non-binding.

18 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 18 Terms Upper/Lower/Middle are all relative terms and should be avoided. We need a scheme that allows for continuous stratification, division and relation of the various components. –Suggestion = a Dewey Decimal like system –Allows for infinite subdivision and specification

19 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 19 Example of a Single Breakdown Step The figure at the right shows 3 types of frames that cross the PHY-SAP: MPDUs, Ctrl, MMPDUs. This is a common view. But, 802.11 Stnd. defines that all frames at the PHY-SAP are MPDUs. Therefore we need a new name for the data laden MPDUs, say “n1”. n1 MPDUs

20 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 20 Process ARC SC Mission: The ARC group is tasked to discover, analyze, codify, and promote a common understanding of 802.11 architecture. –Discover: To notice or learn, especially by making an effort; Archaic To reveal or expose; –Analyze: To separate (a material or abstract entity) into constituent parts or elements; determine the elements or essential features of; –Codify: To arrange or systematize; –Promote: To help or encourage to exist or flourish; MAC Breakdown is an example of Discover, Analyze, Codify.

21 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 21 MAC Component Breakdown MAC/MLME distinction is not so important right now MLME-SME SAP is well defined, so ought no to include SME components (for now)

22 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 22 Real-time Breakdown Work To the Bat-Easel …

23 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 23 References 1. IEEE Std. 802.11-2007 –Cl. 5 General Description 5.2.5 Integration with non-802.11 LANs Figure 5.6 Connecting to other IEEE 802 LANs [shows portal] –Annex N AP Functional Description Figure N.4 High-level UML entity diagram for the WLAN system Figure N.5 AP UML composition diagram (alternate syntax) 2. 11-04-1225-08 AP Function Summary 3. 11-08-0496-01-000v-merged-access-unit-framework.ppt, Engwer, April 2008 4. 11-04-0540-01-0wng-need-ap-functional-descriptions.ppt, Engwer/O’Hara, May 2004 5. VHT Task Group Organization Approaches.ppt, Engwer/Yang, May 2008

24 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 24 Revisions r0 – 2008-07-15 For first presentation to ARC SC.

25 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 25 Backup Slides

26 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 26 Abstract Systems Analysis "A [system] may be divided for purposes of classical rational analysis by means of its component assemblies and by means of its functions.” - Pirsig From that it follows...

27 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 27 AP Systems Analysis An 802.11 AP [system] may be divided for purposes of classical rational analysis by means of its component assemblies and by means of its functions. –If divided by means of its component assemblies, its most basic division is into a MAC, a PHY, a distribution system and a management entity. –To know what the components are for, a division according to functions is necessary.

28 doc.: IEEE 802.11-08/0867r0 Submission July 2008 Darwin Engwer, Nortel NetworksSlide 28

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