This is the Webinar DTC and Meru Networks hosted on 8/25.
Discussed is 802.11n technology and How Meru Networks addresses of the problems seen in the market with other Wireless Network providers.
802.11n Technology - Presented by Meru Networks and DTC
1. 802.11n – The New Edge NetworkAccess in a post-switching world Matt Johnson, Technical Solutions Director, West Area
2. Meru Networks Company Overview Founded in 2002, Sunnyvale, CA, USA Operations in North America, APAC, EMEA NASDAQ Listed – “MERU” Mission: Deliver Wireless-like-Wire™ experience to the enterprise Virtualized Wireless LAN innovation 5,000+ customers in 55 countries worldwide Category Leadership Enterprise 802.11n solutions pioneer Wireless VoIP, Video/HD video Converged applications at scale Device and user density, seamless mobility, QOS Fixed Mobile Convergence Enterprise WLAN service assurance
3. The Network Edge Design TodayOptimized for Cubicles and Desktops The Wiring Closet The Office AGGREGATION Services CORE Services
9. The New Edge is Distributed Campus Branch Telecommuter
10. What makes wireless for the Edge possible?ANSWER: 802.11n Definition “IEEE 802.11n-2009 is an amendment to the IEEE 802.11-2007 wireless networking standard to improve network throughput over the two previous standards—802.11a and 802.11g—with a significant increase in the maximum raw data rate from 54 Mbit/s to 600 Mbit/s with the use of four spatial streams at a channel width of 40 MHz.” Source: www.wikipedia.org
12. Promise of 802.11n Better coverage Higher throughput Improved coverage through multipath and MIMO; multiple transmit and receive paths Over 6 times better than 802.11a/g * Longer range More reliable Longer range: Over 2 times better than 802.11a/g * More resistant to interference and loss due to multipath * * Based on specifications in the standard.
13. Multiple-In, Multiple-Out Converts multipath into an advantage Does the “impossible”: two transmissions at the same time More Efficient Radio (PHY) More OFDM carriers per stream Faster coding rate per stream Highest rate: 65Mbps; Lowest rate: 6.5Mbps More Efficient MAC Packet Aggregation Bursting Newer sleep modes Double-wide Channels available a b g n 802.11n = 6x Throughput; 2x Range
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16. Multiple packets in one shot: Block ACKsMore Efficient A-MPDU D D D D D D Block ACK A A A A A A
19. 2x2, 3x2, 2x3, 3x3, … What does this mean? Number of Chains = Number of Antennas used at any one time NotNumber of Spatial Streams! Number of Spatial Streams = 3 or less, always 3x_ _x3 3 Tx Antennas 3 Rx Antennas
20. What does this mean? Number of Chains = Number of Antennas used at any one time NotNumber of Spatial Streams! Number of Spatial Streams = 3 or less, always 2x2, 3x2, 2x3, 3x3, … 3x_ _x2 3 Tx Antennas 2 Rx Antennas
21. What does this mean? Number of Chains = Number of Antennas used at any one time NotNumber of Spatial Streams! Number of Spatial Streams = 3 or less, always 2x2, 3x2, 2x3, 3x3, … 2x_ _x3 2 Tx Antennas 3 Rx Antennas
22. 2x2, 3x2, 2x3, 3x3, … What does this mean? Number of Chains = Number of Antennas used at any one time NotNumber of Spatial Streams! Number of Spatial Streams = 2 or less, always 2x_ _x2 2 Tx Antennas 2 Rx Antennas
23. Why Meru for 802.11n Meru was founded to solve common RF issues in order to allow coexistence of Voice, Video, and high volume of Data users across an 802.11 Network.
24. Let’s review the problems with WiFi today Problem #1 – Most wireless access points perform like old wired Ethernet hubs. Problem #2 – Wireless devices make connection and roaming decisions.
30. This leads to….. Lower than expected client counts per AP Sticky clients Clients that ping pong between APs Dropped sessions when clients move around Unequal distribution of client on APs No fairness among users that are connected Lack of QOS for real-time applications like voice Interference among APs Difficulty in trouble shooting issues
31. Solution to the Problems:Meru Air Traffic Control Patented control mechanism that times user transmissions resulting in: Little to no contention loss so many more users possible Fairness for all users even without QOS settings Cleaner RF APs coordinate activities: No co-channel interference Load balancing No ping ponging Seamless Roaming A network of APs – Not islands
32. Solution to the Problems:Virtualization of users Multiple access points appear as one One channel One BSSID Handoff eliminated Network controlled Connections load-balanced across APs Network uses its awareness of traffic conditions to route packets over the air Virtual Cell Access Point Access Point Access Point
38. Because of Air Traffic ControlTraffic Separation Voice: Highest QoS, Admission Control Video: Second QoS, Rate Limited Application-Aware Flow Detection Data: Best Effort, Airtime Fairness
39. CH 1 CH 11 CH 6 CH 1 Design Considerations Lack of Site Planning Tools Channel Planning Challenges Migration of infrastructure from .11a/g to .11n Two Different channel plans for 2.4 and 5 GHz using same AP chassis Increase in interference with Increase in range Power over Ethernet "Site surveys will be of marginal use in 802.11n environments” - Ken Dulaney, VP Distinguished Analyst, Gartner 30
40. Summary of Meru Advantages Predictable and reliable performance for all users Fairness among all wireless devices Highest density of users per radio vs other vendors A wireless network that supports multimedia Wireless network free of co-channel interference Network is in control of the wireless client (seamless roaming) Simplicity of design and ease of implementation Advanced Troubleshooting tools Better ROI and less OpEX
The diagram represents what networks are architected for today – “Put in a switching architecture that provision 2 to 4 ports per user”. This leads to vastly overbuilt networks.Networks architected today we designed over 20 years ago when workers were only accessing applications with personal computers (PCs) and they worked only at their desks. IT departments designed their architectures and operations for this scenario and became very very optimized for the cubicle world.Main Points on this slide:Duplication of edge services complicates management (WLAN and LAN) and provides inconsistent QoS (Impactsproductivity)Port Density issues (Over-paying for extra, unused ports)Integration for emerging clients and applications difficult/complicated (QoS, wireless, etc.) (Not Future Proof)Must implement QoS services if voice, video, data planned on switched infrastructure (Over-build for corner case)Moves, Adds, Changes VERY expensive with wired POE ports (Cost)Before and after. Before: Many laptops and wires; After: Edge tomorrow – No wires/desktopsIts over!
World is accelerating from Desktop/Laptop to Tablet and smartphoneKiller app is VideoEdge is getting distributed (therefore you need it from core to edge service layout)It existed in wired - exists in the new edgeThe ability of the user to effectively use wireless and move around with their work has completely changed this paradigm. No longer is work confined to cubicles and offices but anywhere a device has access. This has driven the world toward Cloud (ubiquitous applications) and virtualization (for scalability). But the access network was never optimized for this scenario.In fact, in 2011, devices without an Ethernet port will exceed device with one THIS YEAR. Network users’ mode of operation has truly changed.
Networks architected today we designed over 20 years ago when workers were only accessing applications with personal computers (PCs) and they worked only at their desks. IT departments designed their architectures and operations for this scenario and became very very optimized for the cubicle world.Main Points on this slide:Duplication of edge services complicates management (WLAN and LAN) and provides inconsistent QoS (Impactsproductivity)Port Density issues (Over-paying for extra, unused ports)Integration for emerging clients and applications difficult/complicated (QoS, wireless, etc.) (Not Future Proof)Must implement QoS services if voice, video, data planned on switched infrastructure (Over-build for corner case)Moves, Adds, Changes VERY expensive with wired POE ports (Cost)Before and after. Before: Many laptops and wires; After: Edge tomorrow – No wires/desktopsIts over!Put the size of the video streams – what is the impact of this video on the network itself? Bandwidth, etc… Bullet on wireless video surveillance cameras into here if you can (it’s a big deal).Video distribution is becoming cheaper faster than any other technology in a long long while and its adoption is rising as fast or faster than wireless causing even more to be required of the edge network. The network that IT is putting out there needs to be optimized for a new mobile world where the mode of operation is video communication and mobile smart clients.TIM– wireless surveillance
From HQ to home office – the devices accessing and the experience expected is the same.