GOOD MORNINGAND

THANK YOU!

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Jon LeeCore Vision IT SolutionsWireless Practice Managerjlee@cvits.com414.455.0729

25 years in technology sales, design and engineering

Background includes Cisco, Ciena, Dell/Force10 and Xirrus

Agenda

• Wireless basics• Designing for 1:1• 802.11ac• Common Core Testing

Wireless Basics

2 Bands• 2.4GHz is reaching end of the line for performance• Future is in 5GHz and other frequencies

802.11a54Mbps

802.11n600Mbps

802.11ad>5Gbps60GHz

802.11g54Mbps

802.11ac1Gbps

20131999 2000 2003 2004 2007 2008 2009 2010 2012

802.11n-Draft300Mbps

2011

2.4GHz

5GHz

802.11n-Draft150Mbps (non-bond)

802.11n300Mbps (non-bond)

802.11b 11Mbps

Bands and ChannelsTwo frequency bands used in Wi-Fi (27 channels)

•2.4GHz – used by 802.11b/g/n clients•3 non-overlapping channels•Limited bandwidth, prone to interference

•5GHz – used by 802.11a/n clients•24 non-overlapping channels •8X the bandwidth, Less potential for interference

2.4GHz 5GHz

Design it to Perform• Wireless networks must be designed for tablets & netbooks

– Spotty coverage insufficient

• Signal must be solid in all areas– –65dBm minimum– Perform Live Site Surveys

• Full coverage for both Wi-Fi bands– 2.4GHz as the Lowest Common Denominator– 5GHz for most tablets & BEST performance

Designing for 1:1

Some Considerations• Applications

• How much bandwidth?• End Devices

• What type of devices?• How many?

• Bandwidth• Internal (switching)• External (Internet pipe)

• Building Construction• Budget

“Old” Designs

“New” Designs

Math Behind Wireless

• 300 Mbps radios• 300 Mbps is duplex number so….• 150 Mbps is real number• Subtract Ethernet overhead (30%)• Leaves just a little over 100 Mbps

• 450 Mbps radios (same math with slight improvements)• Leaves about 150 Mbps

• Hi-def video is about 7 Mbps• 25 students uses about 175 Mbps• Hopefully ALL are following along watching SAME video• How to get around it? Multicast at wireless edge/Layer 7 controls

• This is why 1 radio PER CLASSROOM or one (1) 2-radio AP per classroom are designed

802.11ac

(not air conditioning)

802.11ac highlights

• Developed 2011 to 2013• Standards Approved Jan. 2014• Few AP’s available support ac (residential)

– Commercial AP’s now starting to ship

• Few end devices supporting ac (Apple, Samsung, HTC)• Wave 2 will begin this year, particularly for commercial and

education• 3 data streams @ 433 Mbps yields about 1.3 Gbps

– Yields roughly 500 Mbps switching equivalent– Could support 70 users all streaming high def video! (2 rooms per AP)

• Design using standard 5G spectrum coverage

Common Core Testing

Common Core in Wisconsin

• Mandated 2014-2015 school year– Are you ready?– Do you have a plan?– Start thinking about it!

• AZ estimated cost to be $250 Million to have all schools ready

• E-rate NOT funding infrastructure for 2013/14 school year

• E-rate expected to fund for 2014/2015• Get close to your Superintendent (Bonds, grants)

What You Need To Plan For• Infrastructure- Gig Speed backbone is the goal

– Fiber, Wi-Fi, Switches, Routers, etc. that can handle 1 Gbps load• The ability to handle a minimum of 35+ devices per classroom (1:1 and BYOD)

– That number is of course low. The real number is 50-75 devices within 2 years.– Wi-Fi must be able to operate at the same level as a wired network

• Must be able to test up to 500-1,000 students at the same time for an extended period

– The stress on the network is growing exponentially!

• Broadband- More speed Captain!– The Federal and state initiatives are calling for 500 Mbps to each school site and

1Gbps within 3 years to the schools site– Currently schools avg 10 Mb per site

• Mobile Devices by the bucket load– Laptops, tablets, Netbook now. Production of such devices has reached a record and

yet they have only shipped 5% of what is needed to meet the demand for the coming 2 years.

Possible Options

• Mobile Cart WITH AP• Redesign wireless network

– Relocate and augment?– New AP’s? 802.11ac?– Add more AP’s?

• Channel interference (reduce power on AP’s)

• Gartner predicted that by 2015, wireless networks installed just a few years ago would be obsolete

Questions?

Please ask!

Jon LeeCore Vision IT SolutionsWireless Practice Managerjlee@cvits.com414.455.0729