Spectrum 2020. Presentation by Andrew Kerans, Executive Manager, Spectrum Infrastructure Branch, ACMA

Spectrum 2020

Dr. 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?