wireless - rcgsas.com · wireless local area network (WLAN) ... 2 1 DSSS, FHSS a Sep 1999 5 20 6,...
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Transcript of wireless - rcgsas.com · wireless local area network (WLAN) ... 2 1 DSSS, FHSS a Sep 1999 5 20 6,...
*standards
IEEE 802.11 is a set of standards for implementing wireless local area network (WLAN) computer communication in the 2.4, 3.6 and 5 GHz frequency bands
Mobile Units
Power Station
Control center
Distr ibution
Automation
Device
(DA)
WiMAX
Base Station
WiMAX
Base Station
Access
Point
(AP)
Video Surveillance
Sub
Station
Distr ibution
Automation Device
(DA)
Video
Surveillance
Wind
Farm
Distr ibution
Automation
(DA)
Access
Point
(AP)
Distr ibution
Automation
Device (DA)
Access Point (AP)
Smart Meter
Residentia
l Area
Commercial
Area
*Power system
*history
*history
802.11
protocol Release
Freq.
(GHz)
Bandwidth
(MHz)
Data rate per
stream
(Mbit/s)
Allowable
MIMO
streams
Modulation
— Jun 1997 2.4 20 1, 2 1 DSSS, FHSS
a Sep 1999 5
20 6, 9, 12, 18, 24,
36, 48, 54 1 OFDM
3.7
b Sep 1999 2.4 20 5.5, 11 1 DSSS
g Jun 2003 2.4 20 6, 9, 12, 18, 24,
36, 48, 54 1 OFDM, DSSS
n Oct 2009 2.4/5
20
7.2, 14.4, 21.7,
28.9, 43.3,
57.8, 65, 72.2 4 OFDM
40
15, 30, 45, 60,
90, 120, 135,
150
*history
WiFi has enjoyed a consistent lead in wireless technology
WiFi attracts a lot of silicon investment due to
Value to consumer
Large market-- global wireless & frequency standard
Relatively fast product cycles
Wireless Technology Commercial Introduction Dates
*Future WiFi´s
*802.11ac – Gigabit WiFi for 5GHz
*802.11ad – Multi-gigabit WiFi for
60GHz
*802.11af - WiFi for TV ‘White
Spaces’
*WiFi expansion
Increased performance over time
New
Applications
over time
Home WiFi
Enterprise WiFi
Basic Hotspots
Super Hotspots
3G & 4G Offload
Reliable Video Distribution
Fixed Wireless Broadband
Adaptive Mesh Backhaul
Gigabit PAN
…….
TVWS Overlay
Free Spectrum
+
Cheap Silicon
==============
Lots of Applications
*WiFi in 5 years
11af < 700 MHz 1 to 10 mbps
11n 2.4 GHz 20 to 100 mbps
11n, 11ac 5 GHz 50 to 1000 mbps
11ad 60 GHz 1 to 10 gbps
Comparison of Mobile Internet Access methods
Standard Family Primary Use Radio Tech Downlink (Mbit/s) Uplink (Mbit/s) Notes
WiMAX 802.16 Mobile Internet MIMO-SOFDMA 128 (in 20MHz
bandwidth)
56 (in 20MHz
bandwidth)
WiMAX update IEEE
802.16m expected to
offer peak rates of at
least 1 Gbit/s fixed
speeds and
100Mbit/s to mobile
users.
LTE UMTS/4GSM General 4G OFDMA/MIMO/SC-
FDMA
100 (in 20MHz
bandwidth)
50 (in 20 MHz
bandwidth)
LTE-Advanced update
expected to offer
peak rates up to 1
Gbit/s fixed speeds
and 100 Mb/s to
mobile users.
Flash-OFDM Flash-OFDM
Mobile Internet
mobility up to
200mph (350km/h)
Flash-OFDM
5.3
10.6
15.9
1.8
3.6
5.4
Mobile range 30km
(18 miles)
extended range 55
km (34 miles)
HIPERMAN HIPERMAN Mobile Internet OFDM 56.9
Wi-Fi 802.11
(11n) Mobile Internet OFDM/MIMO
300 (using 4x4 configuration in 20MHz
bandwidth) or 600 (using 4x4 configuration
in 40MHz bandwidth)
Antenna, RF front
end enhancements
and minor protocol
timer tweaks have
helped deploy long
range P2P networks
compromising on
radial coverage,
throughput and/or
spectra efficiency *summary
*summary
Standard Family Primary Use Radio Tech Downlink (Mbit/s) Uplink
(Mbit/s) Notes
iBurst 802.20 Mobile Internet HC-
SDMA/TDD/MIMO 95 36
Cell Radius: 3–12 km
Speed: 250km/h
Spectral Efficiency: 13
bits/s/Hz/cell
Spectrum Reuse Factor: "1"
EDGE Evolution GSM Mobile Internet TDMA/FDD 1.6 0.5 3GPP Release 7
UMTS W-CDMA
HSDPA+HSUPA
HSPA+
UMTS/3GSM General 3G
CDMA/FDD
CDMA/FDD/MIMO
0.384
14.4
56
0.384
5.76
22
HSDPA widely deployed. Typical
downlink rates today 2 Mbit/s,
~200 kbit/s uplink; HSPA+
downlink up to 56 Mbit/s.
UMTS-TDD UMTS/3GSM Mobile Internet CDMA/TDD 16
Reported speeds according to
IPWireless using 16QAM
modulation similar to
HSDPA+HSUPA
1xRTT CDMA2000 Mobile phone CDMA 0.144
Succeeded by EV-DO for data
use, but still is used for voice
and as a failover for EV-DO
EV-DO 1x Rev. 0
EV-DO 1x Rev.A
EV-DO Rev.B
CDMA2000 Mobile Internet CDMA/FDD
2.45
3.1
4.9xN
0.15
1.8
1.8xN
Rev B note: N is the number of
1.25 MHz chunks of spectrum
used. EV-DO is not designed for
voice, and requires a fallback
to 1xRTT when a voice call is
placed or received.
