1. Doc.: IEEE 802.11-04/528r1 Submission May 2004 Conner (Intel Corp.) Slide 1 Defining Usage Models for 802.11s ESS Mesh W. Steven Conner Intel Corp. Contributions From: Roxanne Gryder, Mark Yarvis, Jasmeet Chhabra May 11, 2004

2. Doc.: IEEE 802.11-04/528r1 Submission May 2004 Conner (Intel Corp.) Slide 2 Outline   Goals for Defining Usage Models   Examples: Home, Office, Hotzone   Driving Requirements and Evaluation with Usage Models   Recommended Next Steps

3. Doc.: IEEE 802.11-04/528r1 Submission May 2004 Conner (Intel Corp.) Slide 3 Defining Usage Models for 802.11s  Exercise: Define and document expected use and behavior of ESS Mesh networks  Recent Example: TGn Usage Models (11-03/802)  Application: source or sink of wireless data  Environment: type of place where the WLAN deployed  Use Case: how an end-user uses a system that exercises the WLAN (application in a deployment environment)  Usage Model: Collection of one or more Use Cases that specifies a realistic scenario to evaluate  Additional Items Useful to Capture in ESS Mesh Usage Models:  Node mobility (mesh APs and clients)  Security (mis)use cases and threats  Connectivity to non-802.11 networks  Network management use cases

4. Doc.: IEEE 802.11-04/528r1 Submission May 2004 Conner (Intel Corp.) Slide 4 Why Define Usage Models?  Drive functional requirements  What are the functional components?  What are the requirements for each component?  Drive evaluation and comparison criteria  What are the performance evaluation metrics?  How to evaluate solutions against and security threats?

5. Doc.: IEEE 802.11-04/528r1 Submission May 2004 Conner (Intel Corp.) Slide 5 Home Network Usage Model Example Office Bedroom Den Internet Mesh AP Mesh SoftAP PCs Mesh AP CE Devices Non-Mesh Clients User Requirements:  Reliable high-bandwidth coverage throughout home  Internet access and high-bandwidth peer-to-peer A/V streams and data transfer (e.g., MPEG content between PVR and HDTV)  Self-managing and easy to install (non-technical consumers)  Network and data are “secure” Deployment Characteristics:  Densely interconnected wireless topologies  Usually one broadband Internet connection out of home  Blurred lines between infrastructure and clients:  Many fixed or rarely moving devices such as Gateway/AP, PC, PVR (good candidates for Mesh APs)  Battery-powered clients may be mobile in the home (laptops, PDAs, cameras)

6. Doc.: IEEE 802.11-04/528r1 Submission May 2004 Conner (Intel Corp.) Slide 6 Small/Medium Office Network Usage Model Example Two Scenarios  AP mesh  SoftAP PC mesh Non-mesh clients Mesh SoftAP User Requirements:  Reliable high-bandwidth network coverage anywhere in the office/campus  Applications primarily require access to Intranet services, with limited peer-to-peer (e.g. file/presentation sharing, printing)  Network administrator must be able to control and manage the ESS Mesh infrastructure  Network and data are “secure” Deployment Characteristics:  Relatively dense infrastructure topology to support high client densities  Potentially multiple gateways to wired Intranet and other networks  Fixed Infrastructure may include Mesh APs and desktop Mesh SoftAP PCs  Fixed and mobile clients (PCs, laptops, PDAs, etc).

7. Doc.: IEEE 802.11-04/528r1 Submission May 2004 Conner (Intel Corp.) Slide 7 Hotzone Network Usage Model Wired Network User Requirements:  Reliable coverage anywhere in the hotzone), e.g., across airport or shopping center  Client applications primarily require Internet access  Network provider must be able to control and manage the ESS Mesh infrastructure  Network and data are “secure” Deployment Characteristics:  Dedicated infrastructure of fixed-location Mesh APs (relatively sparse topology)  Potentially multiple gateways to Internet and other wired networks  Fixed and mobile clients (laptops, handhelds, etc.)

8. Doc.: IEEE 802.11-04/528r1 Submission May 2004 Conner (Intel Corp.) Slide 8 Summary of Deployment Characteristics HomeOfficeHotZone Scale (Number of Mesh APs) Small- Medium Medium- Large Density of Mesh APs HighMedium- High Low- Medium Frequency of Physical Mesh AP Topology Change Low Frequency of Mesh Link Quality Changes Medium- High Medium- High Number of connections to other (e.g. wired) networks Low (1-2)Medium- High Low- Medium

9. Doc.: IEEE 802.11-04/528r1 Submission May 2004 Conner (Intel Corp.) Slide 9 Possible Process for Driving Requirements and Evaluation Criteria with Usage Models Usage Models Functional Components Evaluation / Comparison Criteria Evaluation / Comparison Criteria Evaluation / Comparison Criteria Evaluation / Comparison Criteria Evaluation / Comparison Criteria Functional Requirements Iteration Assumptions

10. Doc.: IEEE 802.11-04/528r1 Submission May 2004 Conner (Intel Corp.) Slide 10 Proposed Next Steps 1.Create common usage model description document  11n Usage Model document is a reasonable starting point, but need to extend and prioritize for ESS Mesh  Include security (mis)use-cases and threat analysis 2.Define major functional components and begin compiling requirements based on usage models

11. Doc.: IEEE 802.11-04/528r1 Submission May 2004 Conner (Intel Corp.) Slide 11 Thank You! Questions?

12. Doc.: IEEE 802.11-04/528r1 Submission May 2004 Conner (Intel Corp.) Slide 12 Backup

13. Doc.: IEEE 802.11-04/528r1 Submission May 2004 Conner (Intel Corp.) Slide 13 What Problems Motivate the Use of ESS Mesh?  Limited WLAN range/coverage  Reliability  Performance  Deployment cost/effort  Ease of use

14. Doc.: IEEE 802.11-04/528r1 Submission May 2004 Conner (Intel Corp.) Slide 14 Example Traffic Classes ApplicationsOffered Load ProtocolMaximum Packet Loss Rate Maximum Delay Internet File Transfer (email, web, chat) 1Mbps TCP Local File Transfer (printing, backup, multimedia) 30Mbps (bulk transfer) TCP Netmeeting application 500kbpsTCP Internet Streaming Video/Audio 100kbps- 4Mbps UDP 1% 200ms VoIP 20-150kbps UDP 5% 30ms SDTV 4-5MbpsUDP5x10 -7 200ms HDTV 19.2-24MbpsUDP 10 -7 200ms Source: TGn Usage Models 11-03/802r16