spectrum 2020 dr. andrew kerans executive manager spectrum planning branch
TRANSCRIPT
Spectrum 2020Dr. Andrew Kerans
Executive Manager
Spectrum Planning Branch
Overview.>Broadband demand.>Efficiency offsets.>Spectrum demand.>The evolving user.>WiFi congestion.>Spectrum from where?>Cognitive radio.>Whitespace; are there any opportunities?>A wide brown land (horses for courses).
Mobile data traffic growth
Consumer demand expected to plateau, however M2M expected to climb resulting in overall exponential growth.
Mobile data traffic growth
Mobile data traffic growth
Mobile data traffic growth
Methods of traffic abatement>New technologies
•1995. 1 bit/Hz•2000. 5 bits/Hz•2005. 10 bits/Hz•2010. 15 bits/Hz•2020. 20 bits/Hz??
Technologies such as MIMO may deliver up to 50 bits/Hz. That’s 500 Mbit for a 10 MHz Channel!!!!
So where is the Shannon limit????
Methods of traffic abatement> Increased infrastructure — greater number of smaller cells.
> Not acceptable to trade spectrum for infrastructure $$ while
legacy equipment still operates.
> ACMA will consider incumbents before re-farming spectrum.
Effects of traffic abatement on mobile spectrum demand
Effects of traffic abatement on mobile spectrum demand
Effects of traffic abatement on mobile spectrum demand
Effects of traffic abatement on mobile spectrum demand
Mobile devices outside
Mobile device inside
Data offload
Data offload
The problems begin at about 39:50 into the keynote speech at World Wide Developers Conference , when Jobs tries to connect to the New York Times Web site from the iPhone. Jobs gives an audible sniff of disgust (40:03) when the page doesn’t load, saying “our networks in here are always unpredictable, so… no idea what we’re going to find,” then “they are slow today.”
40:20 “you know you can help me out if you’re on WiFi, if you’d just get off… I’d appreciate it” (laughs). Then he finally gave up, saying “I have a problem and I’m not going to be able to show you much today.” He then punted to show photos from the camera roll – which doesn’t require a network connection.
Congestion!!
it was the overwhelming number of portable WiFi access points competing for airspace that caused the problems. According to InfoWorld’s consultation with an Apple engineer at the event, over 500 networks were in operation at the same time.Do we need to allocate more spectrum??
60 GHz????
Project IEEE 802.11ad Very High Throughput in 60 GHz
Spectrum for data offload devices>Where will it come from?
The ACMA is asking this question.
Cognitive radioACMA engineers continue to look at the issues and
contribute to international debate.
Whitespace????
Maximum contiguous white space channels post restack
Maximum contiguous white space channels post restack:
Sydney Basin
Earth Stations
Spectrum denial from C-Band receiver
Earth station siting
Questions?