September 2002 doc IEEE 802 11 02518 r
September 2002 doc. : IEEE 802. 11 -02/518 r 0 Qo. S Needs for Enterprise/VPN Applications – A Service Provider View AT&T Presented by Damon Wei – AT&T Business Services Submission 1 Damon Wei, AT&T
September 2002 doc. : IEEE 802. 11 -02/518 r 0 Talk Outline • • • Submission A Look at Managed LANs Perception of Market and Growth The Expanded Service Picture Qo. S and Capacity Issues Needs of Qo. S Based Services Recommendations 2 AT&T
September 2002 doc. : IEEE 802. 11 -02/518 r 0 A Look at Managed-Service LANs • LANs/broadband now a fundamental part of information-based businesses • LANs are getting larger and faster • Increasingly complex networking environment • Now integral part of corporate “intranets” • Upkeep rivaling circuit facilities • Desire to upgrade reliability, reduce management overhead, increase utility • Managed service packages increasingly attractive to maximize performance, control costs Submission 3 AT&T
September 2002 doc. : IEEE 802. 11 -02/518 r 0 Managed Services Wired-Wireless Market • Wireless LANs widely adopted as enhancement to fixed LANs ($1. 8 B business in 2001) • Market Growing at 12. 5% CAGR (2001 -2005 IDC 07/02) • WLANs moving from small user pools to building-wide use • Full-premises mobility viewed as productivity tool – – – SWAT Teams ( “instant” infrastructure/info access) Meeting effectiveness (electronic distribution, collaboration) Key decision maker response-time improvement Mobility-dependent job (mfg. floor, inventory, etc) efficiency benefits Reduced stranded wiring, easier move-and-change • Majority of LAN RFQs include Vo. IP, WLAN, WVo. IP capabilities • Vo. IP market ~1 B in 2001, steady WVo. IP growth forecast Submission 4 AT&T
September 2002 doc. : IEEE 802. 11 -02/518 r 0 Wireless LAN MDS Opportunity "If any one technology has Enterprise WLAN Forecast (Annual, 000’s) emerged the past few years that will be explosive in its impact, it's 802. 11. " ü Emergence of dominant, proven standard - 802. 11 (Wireless Ethernet) ü Ethernet compatibility (Natural extension of Ethernet mgmt. tools) ü Increasing business acceptance (Lower costs, VPN capability) ü New 802. 11 e Quality-of-Service capability (Voice, Data, Video support) Submission 5 AT&T
September 2002 doc. : IEEE 802. 11 -02/518 r 0 Enterprise Service Picture • Businesses seeking more communications utility (full multimedia support) for less cap-ex and labor cost • Vo. IP, WVo. IP high on list of desired immediate services – – – Retire aging PBXs and phones Simplify provisioning (PC->laptop, deskphone->handset) In-building, campus, multi-location telephone mobility Multimedia voice/data integration (PDAs, PCs w/headsets) Reduce cellular charges for on-prem calls • Virtual Private Networks – – Teleworkers now 1/5 of workforce, most at home Cost savings about one times salary per year per teleworker Desk “cloning” including telephony a large productivity factor Simplified home distribution, convenience is key • Qo. S, Security, Network Manageability, Scalability, Office/Home Interoperability are biggest issues Submission 6 AT&T
September 2002 doc. : IEEE 802. 11 -02/518 r 0 Qo. S, Capacity, Inter-Op Needs • Businesses view telephony quality as part of company image • Corporate networks, like commercial networks, must run with substantial loading to maximize return on capital expenditure • Radio networks will remain throughput-challenged due to spectrum and power constraints (can’t raise speed like Ethernet) • MAC Qo. S guarantees are necessary to preserve end-to-end connection quality under heavy/overload conditions • “Parameterized” Qo. S simplifies interface with corporate and backbone networks, supports end-to-end concatenation of links • Increasing use of multimedia (audio, video) for customer relationship management (CRM), corporate education, video conferencing - requires Qo. S “future-proofing” • Qo. S option must be common to all QOS-enabled clients to maximize utility regardless of use location Submission 7 AT&T
September 2002 doc. : IEEE 802. 11 -02/518 r 0 Qo. S-Based Service Requirements • Qo. S declarations compatible with end-to-end network processing • High rate voice coder, low system delay to keep last-link a small portion of total Vo. IP network delay budget • System access and bearer resource partitions to prevent system access contention damage to streams in progress • Guaranteed performance regardless of network load • Differentiate signaling from user traffic under all conditions for management purposes • Fast session entry/exit for discontinuous streams (e. g. voice activity) • Sufficient parameter granularity to allow for existing and future radio resource efficiency Submission 8 AT&T
September 2002 doc. : IEEE 802. 11 -02/518 r 0 Service-Provider Observations • Some WLAN services require guaranteed Qo. S (Vo. IP, VPN, video conferencing) • Business networks need QOS to operate at high loads to provide economical, reliable service • Parameterized Qo. S using HCF has demonstrated ability to provide service guarantees under high loads via simulations, tests, and trial service • Migration path to parameterized 802. 11 systems is necessary to satisfy changing business market and open VPN market for sustained market growth • Prioritized and parameterized Qo. S as well as legacy support should be provided to enable customer satisfaction and operation of heterogeneous networks Submission 9 AT&T
September 2002 doc. : IEEE 802. 11 -02/518 r 0 Recommendations • Facilitate managed-service Qo. S-dependent market via required network-grade mode (EPCF, Tspec, CC/RR) while ensuring interoperability of all modes (EDCF, HCF, Legacy DCF) • Make 802. 11 more user friendly by migrating from “connectivity” standard to “access” standard • Allow market segments to decide what works best rather than dictating “one-size-fits-all” Qo. S Submission 10 AT&T
September 2002 doc. : IEEE 802. 11 -02/518 r 0 Backup Slides Submission 11 AT&T
September 2002 doc. : IEEE 802. 11 -02/518 r 0 Timeline to Begin Implementing IP Telephony % of Enterprises (> 500 Employees) 100% 74% 80% 55% 60% 40% 20% 0% 81% 91% 66% 44% 17% 13% 2000 2001 2002 2003 2004 Source: Info. Tech; IP Telephony: Market Demand Impact on CPE, 12/2000 Submission 12 AT&T
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