• How are we going to get there?
of Wi-Fi? Will White Spaces mobile devices become a reality in 2011?
Perry Correll
Xirrus, Principal Technologist
Perry.Correll@Xirrus.com

“We tend to overestimate the effect a technology has in the short run and underestimate the effect in the long run.”

WPAN
HSPA
WLAN
Wi-Max
Bluetooth
802.11bgn
802.11ac
UMTS
WWAN
802.22
802.11ad
LTE
3G/4G
802.11n
Cellular
802.11y
What is going to Win, Where, how do you plan?

Radio Improvements
802.11a
54Mbps 5GHz
IEEE 802.11b
11Mbps 2.4GHz
802.11g
54Mbps
2.4GHz
802.11n –Draft
150Mbps 2.4GHz
600-Mbps 5GHz
802.11n
150Mbps 2.4GHz
600Mbps 5GHz
802.11ac
Gigabit
1000Mbps
5GHz
802.11ad
Multi-Gig
2000Mbps
60GHz
802.11af
TV
White
Space
1999 2000 2001 2003 2004 2005 2007 2008 2009 2010 2011 2012
MAC Improvements
802.11i
Security
802.11e
Wi-Fi
TKIP +AES
Encryption
Quality of
Service
802.11r
Fast
Roaming
802.11k
Radio
Resouce
Mgmt
802.11w
Protected
Mgmt
Frames
802.11v
Wireless
Network
Mgmt
802.11u
External
Network
Interface
802.11s
Mesh

Ethernet to Ethernet
Wi-Fi (2.4GHz) to Wi-Fi (2.4Ghz)
Wi-Fi (5GHz) to Wi-Fi (5Ghz)
Cellular G3 to Cellular G3
??? to ???
Fixed state devices on both sides of link
No Evolution, No Upgradability, No choices

Key concepts discussing 5G wireless communications are:
Networks providing ubiquitous computing: User can simultaneously be connected to several wireless access technologies and seamlessly move between them.
802.21 - Standard supports algorithms enabling seamless handover between networks of the same type as well as handover between different network types also called Media independent handover (MIH) or vertical handover.
LTE
Wi-Fi
White Space
Other

Cognitive Systems
Spectrum Sensing, Spectrum Management, Mobility, Spectrum Sharing
Software Defined Radios (SDR)
Radio components defined in software (vs. hardware) allowing support for different frequencies and protocols.
Antenna Design Improvements (SDA)
Multiple antenna elements and /or reconfigurable antennas, Smart
Antennas, External Antennas, Software Defined Antennas (SDA).
Coexistence and interoperability Standards
802.19.1, 802.21, others

• Multistate radios (2.4GHz, 4.9GHz & 5 GHz)
• Directionality (Antenna beamforming)
• Dynamic 802.11h
• Auto Channel
• Auto Band
• Band Steering
• Mode Steering
• Spectrum Monitoring
• Reconfigurable Antenna

• 5G / 802.21 / 802.11u / HotSpot 2.0
• Multi-Technology across Radios
• Wi-Fi/LTE/WS/???
• Seamless Handover Between Technologies
• Software Defined Radios
• Software Defined Antennas
?

Perry Correll
Xirrus, Principal Technologist
Perry.Correll@Xirrus.com