Noisy Times in Wireless. Welcome to Our World
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1 Noisy Times in Wireless Welcome to Our World
2 Wi-Fi Powers the Post-PC Era Ultrabooks Environmental Systems Lighting Projectors A WORLD GOING WI-FI Annual Unit Shipments Source: isuppli B Wi-Fi devices Tablets 874M 694M Ethernet devices 1.1B WHY WI-FI? o Mobile data plans drive user demand for Wi-Fi o No spectrum fees for Wi-Fi service providers o Delivers over 775MHz of free spectrum o Low cost/bit in wireless data capacity 2
3 Wi-Fi is the New Ethernet Opens Up Massive New Market Opportunity Ethernet Switch Port Market ($ in billions) $25B Y E S T E R D A Y T O D A Y $1B 95 Source: DellOro Group Today 3
4 Lots of Choices: Everyone has a Thing Big and Cloudy Roaming for Voice Access / Security Controller-Less? Cisco Look-a-Like High Density Super Low Cost Reliability 4
5 The Only Thing that Really Matters The signal, the PHY, the air. It s the foundation and the only place where speed and capacity can be improved. 5
6 But Wi-Fi Has Personal Issues o Coverage: 1997 present o Security: o Roaming: o Speed: 2003 present o Capacity: June 29 th present 6
7 It s Inconsistent R A T E A D A P T A T I O N Access points are responsible for choosing the best combination of modulation and coding at any point in time for each connected device. N E E D E D The ability to pick the best data rate based on historical, statistical models of performance for each client 7
8 It s Unruly 8
9 It s Unclear Interference is a Killer! Dropped connections have a huge and negative impact on business operations 9
10 Old School Thinking Traditional Approaches to Dealing with RF Interference Reduces performance, channel capacity Reduces coverage, add more APs Creates chaos 10
11 Doesn t 5GHz Solve Everything? 5.15 GHz 5.25 GHz 5.35 GHz GHz GHz GHz UNII-1 UNII-2 DFS UNII-2e DFS UNII-3 NON-DFS CHANNELS MHz 40MHz 40MHz 40MHz o24 non-overlapping 20 MHz channels o11 non-overlapping 40 MHz channels oonly 4 non-dfs channels for bonding ocreates channel planning problems similar to 2.4 GHz o5 GHz isn t a panacea, RF management is still king 11
12 And New Standards Won t Save You o Wider channel bandwidths (80 and 160MHz) o More spatial streams (3+) o More efficient modulation o Multi-user MIMO o But limited improvement for enterprise customers 12
13 The Key to Better Wi-Fi: SINR Receive Signal Level SNR SINR T I M E Noise Floor owhen faced with interference, it s SINR that matters ohigher SINR = Higher data rates and capacity oso how do you get a high SINR? oyou can either increase signal or decrease interference oadaptive (smart) antenna systems do both! 13
14 Unique, Patented Technology THEM US Fixed 1:1 relationship between Wi-Fi radios and antennas Dynamic 1:many relationship between Wi-Fi radios and antennas 14
15 How Smart Wi-Fi Works Interference o Patented technology that combines: o Smart antenna arrays o Best path selection algorithms o Advanced quality of service engine o Smart mesh RF routing o Centralized Wi-Fi management o Adapts to real-time changes in environmental conditions o Extends signal range (Wi-Fi coverage) 2 to 4 times with fewer APs o Radically simplifies deployment and administration 15
16 Automatic Interference Mitigation Minimizes Packet Loss and Re-Transmissions, Increases Reliability AP o Interference mitigated by positioning antenna nulls in specific directions o Avoiding interference delivers more benefits than a stronger signal o Better throughput o More predictable connectivity 16
17 Adaptive Polarization Diversity Device orientation accounts for up to 5x performance differential among products obetter reception (PD-MRC) for weak and hard to hear devices obetter transmission to devices constantly changing their orientation HORIZONTAL POLARIZATION VERTICAL POLARIZATION 17
18 Please Don t Believe Us What s the breaking point for an enterprise AP? How do new n APs performance in the presence of interference? How do new 3-stream n APs performance in a real world environment? 18
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