Victor Bahl Microsoft Corporation
Victor Bahl Microsoft Corporation SIGCOMM MobiArch 2007, August 2007 Source: Victoria Poncini, MS IT ~7, 000 Access Points ~65,000 XP & Vista Clients December 2006 ~40,000 connections/day ~35,000 handheld devices 100% 80% 39,6% 37,3% 42,2% 45,8% 47,1% 60% 40% 39,8% 39,7% 34,2% 44,2% 35,3% 20% 18,1% 20,1% 16,2% 17,6% 22,9% 0% Worldwide Americas w/o PS Puget Sound EMEA APJ Very SfSatisfied SSfSomewhat Satisfied SfSomewhat Dissatisfied or Very Dissati fied 2 Victor Bahl Microsoft’s IT Dept. logs several hundred complaints / month 70% calls are about client connectivity issues (e. g. ping-ponging between APs) 30% (and growing) are about performance problems due to interference End-users complain about Lack of RF coverage, performance & reliability Connectivity & authentication problems Network administrators worry about Providing adequate coverage, performance Security and unauthorized access Corporations spend lots of $$ on WLAN infrastructure WLAN hardware business to reach $2.6 billion in 2007. (Forester 2006) Heavy VC funding in this area (e.g. AirTight $36M in the last 16 months) 3 Victor Bahl 4 Victor Bahl FY05 Cost Element View Functional View Breakdown People 72% Applications 60% Data & Voice 16% App Development (29%) App Support (31%) Hardware 5% Facilities 5% Infrastructure 40% Software* 2% Network (14%) * 5% If MS software were included Data Center (7%) Employee Services (5%) Voice (5%) 30% Helpdesk (5%) New Increases Security (3%) Capability value 45% New 70% Capability Sustaining & Running Decreases Existing maintenance 55% Capability delivery Existing Capability 5 Victor Bahl Timeline HotNets’05 , MobiSys’ 06, NSDI ‘07 ACM CCR ’ 06 MobiCom’ 04 MobiSys’ 06 6 Victor Bahl Heterogeneous world Multiple technologies: 802.
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