September 2003

Adrian Stephens, Intel Corporation

Slide 1

doc.: IEEE 802.11-03/702r0

Submission

Report of 802.11 High Throughput Usage Model Special Committee

Adrian P Stephens

(adrian.p.stephens@intel.com)

Chair, Usage Model Special Committee

September 2003

Adrian Stephens, Intel Corporation

Slide 2

doc.: IEEE 802.11-03/702r0

Submission

Status

• Meetings– Minutes in 11-03-354r10– 11 meetings, 12 hours telecon, 8.5 hours F2F

• Output Document– 11-03-355r8 (40 pages)

• Status of document– “Not quite complete”

September 2003

Adrian Stephens, Intel Corporation

Slide 3

doc.: IEEE 802.11-03/702r0

Submission

Usage Model Document

• Environments – 41

• Applications – 25 (4 incomplete)

• Use Cases – 37

• Usage Models – 10

• Simulation Scenarios – 8 (2 missing)

September 2003

Adrian Stephens, Intel Corporation

Slide 4

doc.: IEEE 802.11-03/702r0

Submission

Example Usage Model (Residential)• 1 x AP

• STA 1: 19.2 Mbps HDTV (A4) , VoD control channel (A2)

• STA 3: 24 Mbps HDTV (A4) , VoD control channel (A2)

• STA 4: SDTV (A3), internet file transfer (A9), Video gaming, controller to internet (A18), local file transfer A(15), printing (A22)

• STA 5 & 6: Video Phone (A23), internet file transfer (A9)

• STA 7,8 & 9: VoIP (A9)

• STA 10: Internet streaming video (7), MP3 Audio (A12), Video gaming, controller to internet (A18), local file transfer A(15)

• STA 11: Video gaming, controller to console (A16)

September 2003

Adrian Stephens, Intel Corporation

Slide 5

doc.: IEEE 802.11-03/702r0

Submission

Simulation Scenario Methodology

• Parameters for Tx power and Rx noise figure are common to all scenarios

• One table per device in a scenario, contains:– Name, location, channel model – List of data source descriptions

September 2003

Adrian Stephens, Intel Corporation

Slide 6

doc.: IEEE 802.11-03/702r0

Submission

Example Simulation ScenarioSTA Name: AP Role: Access Point Location: 0, 0 Channel Model:

Data Sources

Destination STA

Mean Rate Rate Distribution

MSDU Size

Delay / Jitter limit

STA1 19.2 Mbps Constant, UDP 188 200 / 100ms HDTV + PCM 5.1 Audio

STA3 24 Mbps Constant, UDP 188 200 / 100ms HDTV + futuristic audio

STA4 4 Mbps Constant, UDP 188 200 / 100ms SDTV

STA4 1 Mbps TCP 300 Internet file

STA5 1 Mbps TCP 300 Internet file

STA7 0.15 Mbps Constant, UDP 200 30 / 15 ms VoIP

STA8 0.15 Mbps Constant, UDP 200 30 / 15 ms VoIP

STA9 0.15 Mbps Constant, UDP 200 30 / 15 ms VoIP

STA10 2 Mbps TCP 512 200 / 100ms Internet Streaming video + MP3 audio

September 2003

Adrian Stephens, Intel Corporation

Slide 7

doc.: IEEE 802.11-03/702r0

Submission

Status / Future Work

• The document does not yet represent a consensus of the group due to the high rate of changes made in recent weeks

• Improved alignment with external comments needs to be considered (e.g. effect of WFA MRD)

• Some Applications have unknown traffic patterns• The Simulation Scenarios are incomplete• The Simulation Scenarios are largely untested• There is no error model defined• It may be incomplete with respect to or contradict the

functional requirements and selection criteria documents.

September 2003

Adrian Stephens, Intel Corporation

Slide 8

doc.: IEEE 802.11-03/702r0

Submission

Recommendation

• Identify an existing group or form a new group under 802.11n with authority to modify and maintain the Usage Models document throughout the lifetime of 802.11n

• 4 Hours of F2F time this meeting (with no competing .11n activities) specifically to address Usage models with the aim of reaching consensus

September 2003

Adrian Stephens, Intel Corporation

Slide 9

doc.: IEEE 802.11-03/702r0

Submission

Motion

• Move that 802.11 TGn form a special committee with responsibility for maintaining and modifying the Usage Model document to be consistent with the Selection Criteria and Functional requirements documents as they are developed, and to resolve issues discovered with the simulation scenarios as they are implemented.