Post on 06-Jul-2019
Broadband Wireless Access (WLAN, WiMAX & ... <E)
Avo Ots avots@lr.ttu.ee
Sügise alguspäev aastal 2011
Tredeoff
Rate
Mobility
2G
3G
4G 802.11b WLAN
2G Cellular
Other Tradeoffs:
Rate vs. Coverage
Rate vs. Delay
Rate vs. Cost
Rate vs. Energy
802.11n
Wimax/3G
Node B
• LTE Home Node Bs and its enhancements in Release 9
http://www.nomor.de/uploads/fc/lp/fclpAIhtNJQ9zwyD957atQ/2010-05_LTE_HomeNB_Rel9_Overview.pdf
Self-Organizing Networks (SON) http://www.nomor.de/home/technology/white-papers/self-organizing-networks-in-long-term-evolution
Femtocell vs Wi-Fi
http://gigaom.com/2009/11/02/who-needs-femtocells-if-we-have-wi-fi/
W LAN
http://www.wi-fi.org/
http://www.ieee802.org/11/Reports/802.11_Timelines.htm
http://www.wi-fi.org/Wi-Fi_Direct.php
http://www.wi-fi.org/files/11nbasics_glossary.pdf
802.11 arengud http://en.wikipedia.org/wiki/DSRC
http://www.open80211s.org/trac
http://www.gigabeam.com/Home.aspx
http://www.whdi.org/Technology/
http://wirelessgigabitalliance.org/
Wi Fi kasutus
http://www.row44.com/
http://www.wi-fiplanet.com/news/article.php/3816556
http://en.wikipedia.org/wiki/Bluetooth
http://en.wikipedia.org/wiki/DASH7
Veel arendusi
http://www.smart-wi-fi.com/index.php
http://www.volga-forum.com/pdfs/VoLGA.pdf
http://www.wimaxforum.org/technology/downloads/WiMAX_and_IMT_2000.pdf
http://www.fcc.gov/14report.pdf
Muud allikad
http://wapedia.mobi/en/DASH7
http://www.nfc-forum.org/home/
http://en.wikipedia.org/wiki/Near_Field_Communication
http://www.wimedia.org/en/index.asp
ZigBee
http://www.zigbee.org/
http://en.wikipedia.org/wiki/ZigBee
http://en.wikipedia.org/wiki/ZigBee_specification
Veidi teooriat
http://www2.rohde-schwarz.com/file_10948/1MA111_2E.pdf
LTE vs WiMAX vs WiMAX2 Feature LTE R8 WiMAX R1
(16e)
WiMAX R2
(16m)
Interface DL: OFDMA
UL:SC-FDM
OFDMA OFDMA
Duplexing FDD, TDD TDD FDD, TDD
Mobility 350 km/hr 60-120 km/hr 350 km/hr
Channel Bandwidth
(MHz)
1.25, 1.6, 2.5, 5,
10, 15, 20
3.5, 5, 7, 8.75, 10 5, 10, 20, 40
Peak Datarate (Mbps) DL: 302 (4x4)
UL: 75 (2x4)
2x20 MHz (FDD)
DL: 46 (2x2)
UL: 4 (1x2)
10 MHz TDD 3:1
DL> 350 (4x4)
UL> 200 (2x4)
@20 MHz FDD
Spectral Efficiency
(bps/Hz)
DL: 1.91 (2x2)
UL: 0.72 (1x2)
DL: 1.91 (2x2)
UL: 0.84 (1x2)
DL > 2.6 (4x2)
UL > 1.3 (2x4)
Latency (ms) L2 < 5
Handover < 50
Link = 20
Handover 35-50
Link <10
Handover< 30
Nõuded sidekanalile
Voice Video Data
Delay
Packet Loss
BER
Data Rate
Traffic
<100ms - <100ms
<1% 0 <1%
10-3 10-6 10-6
8-32 Kbps 10-1000 Mbps 10-1000 Mbps
Continuous Bursty Continuous
Sagedusressurss (UMTS tarvis)
23
20 (35) MHz for TDD
2 * 60 MHz FDD (190 Mhz)
1850
1900
2000 2050 2100 2200 2250
20 20 60 30 15 30
DECT
MHz
GSM 1800
60
1920 2110