IEEE Consumer Electronics Magazine - October 2015 - 56

Global Internet Device Installed Base Forecast

20,000,000

Wearables
Smart TVs
IoT
Tablets
Smartphones
Personal Computers
(Desktop and Notebook)

18,000,000

Number of Devices in Use (in Thousands)

16,000,000

BI Intelligence

14,000,000
12,000,000
10,000,000
8,000,000
6,000,000
4,000,000
2,000,000
0
2004 2005 2006 2007

2008 2009 2010

2011 2012 2013E 2014E 2015E 2016E 2017E 2018E

FIGURE 1. Global Internet device installed base forecasts. (Source: Gartner, IDC, Strategy Analytics, Machine Research, Company Filings,
Bill Estimates.)

Bluetooth [27], use for personal area networking, particularly around people and in cars
▼ IEEE 1901 [28], for networking on ac power.
The average user may carry Bluetooth and IEEE 802.11
in their existing smartphones. IEEE 802.15.4 is not yet common, but the ZigBee Alliance has worked very hard to
▼

Distribute Smart Energy Profile 2.0
802.11

Wi-Fi
Router
DSL or
Cable
Modem

Native
Wi-Fi
Device

Wi-Fi to
ZigBee
Gateway

Wi-Fi to
Bluetooth
Gateway

802.15.4

Bluetooth

Native
ZigBee
Device

Native
Bluetooth
Device

802.3
Broadband
Modem
802.3
Ethernet
to
Homeplug
1901

Native
Homeplug
Device
1901

ac power w/Homeplug (IEEE 1901)
FIGURE 2. Distributing smart energy profile 2.0.
56 IEEE ConsumEr ElECtronICs magazInE

^

october 2015

pioneer applications in the home automation markets. As an
example, IEEE 2030.5 Smart Energy Profile 2.0 [29]
descended from the ZigBee Alliances Smart Energy Profile
1.0 [30] (Figure 2).
Given the multiplicity of radios, the interesting possibility
is to support the same applications over each radio. The Internet Engineering Task Force (IETF) [31] has been developing
standards in this area.
The existing deployed Internet is based on IPv4 [32]. The
upside is that it works; the downside is that it is obsolete.
IPv4 has 32-bit addresses, which covers just more than 4 billion hosts. This is not enough addresses for the world's
human population, let alone the multiple devices per person
predicted by advocates for the IoT.
The IETF developed IPv6 [22] two decades ago to support
much larger address spaces. IPv6 uses 128-bit addresses. The first
part of the address, 64-bits long, is more than sufficient to assign
a unique address to every living insect in the world. The challenge for the industry is to arrange migration from IPv4 to IPv6.
The price of IPv6 is that a longer header must be delivered.
For traditional "Internet of people" applications like e-mail, web
browsing, and social media delivered over IEEE 802.11 or Wireless Wide Area Networks [e.g., long-term evolution (LTE)],
there is plenty of bandwidth for the larger IPv6 headers.
However, for small and constrained devices intended for
the IoT, all those bits are a burden. If the application itself is



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