presentation on "wi-max technology"
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DR. C. V. RAMAN UNIVERSITY KARGI ROAD KOTA BILASPUR (C.G.)
2014-15
WiMAX Transreceiver
Presentation On:
INTRODUCTION
WiMAX:“Worldwide Interoperability for Microwave Access” supports point to multi-point (PMP) broadband wireless access.
WiMAX is basically a new shorthand term for IEEE Standard 802.16.
The IEEE wireless standard has a range of up to 30 miles or 50 kilometers.
WiMAX COVERAGE
WiMAX coverage is approximately 40 Mbit/s and is going to touch 1 Gbit/s for fixed users in the near future.
Similarly, fixed users can access WiMAX and it ranges 50 km or 30 miles.
The case for the mobile user is different. It could not go to that extent as stationary customers.
For mobile users the WiMax coverage is 5-15 km or 3-10 miles.
EVOLUTION OF IEEE 802.16 STANDARDS
• Evolution of IEEE family of standard for BWA
The standard provides secification for PHY and MAC layer
IEEE 802.16-2001
ᴥ fixed BWA access in a point-to-point (PTP) topology.ᴥ Single carrier modulationᴥ 10-66 GHz frequency rangeᴥ Connection oriented
6
EVOLUTION contd.. IEEE 802.16a
ᴥ Added physical layer support for 2-11 GHzᴥ NLOS operation becomes possibleᴥ OFDM included as an alternative to single carrier modulation
IEEE 802.16-2004
ᴥ 2-11 GHZ frequency rangeᴥ 256 subcarriers OFDM Techniqueᴥ Fixed and Nomadic access
IEEE 802.16e
ᴥ Scalable OFDMAᴥ Mobile BWA
WAN IEEE 802.16eIMT-2000(3G)(Nationwide)
MANIEEE 802.16-2004
ETSI HiperMAN/WiMAX(50 Km)
LANIEEE 802.11 (a,b,g)
(150 m)
PANIEEE 802.15Bluetooth
(10m)
TYPICAL NETWORK RANGES
Wide Area Network
Metropolitan Area Network
Local Area Network
Personal Area Network
SCOPE OF 802.16 STANDARDS
SAP: Service Access PointPDU: Protocol Data Unit
Accept, perform classification, process higher PDUsDeliver CS PDU to MAC SAPReceive CS PDUs from the peer entity
System access, bandwidth allocationconnection establishment, connection maintenance
Authentication, security key exchange, encryption
IEEE Std 802.16 protocol layering
Multiple specifications each appropriate to frequency range (ex: 802.16.1 10-66GHz up to 134Mbit/s) and application
IEEE 802.16 SPECIFICATIONS IEEE 802.16 Protocol Stack
MAC Layer Service specific convergence Sublayer(CS)
-MAC CS receives higher level data -provides transformation and mapping into MAC SDU-ATM CS and packet CS
MAC Common Part Sublayer (CPS) - System access, bandwidth allocation, connection management-QoS provisioning
Privacy Sublayer-Authentication, secure key exchange, encryption
PHY Layer-Four different physical layer specifications-SC, SCa, OFDM, OFDMA
Service-Specific Convergence Sublayer (CS)
MAC Common Part Sublayer (MAC CPS)
Security Sublayer
Physical Layer (PHY)
CS SAP
PHY SAP
MAC SAP
Data /Control Plane
PHY
MAC
Scope of standard
Management Entity
Service Specific CS
Management Entity
MAC CPS
Security Sublayer
Management EntityPHY
Management Plane
IEEE 802.16 SPECIFICATIONS Cont. .
Network Architecture and Deployment Topology
Architecture Resembled to cellular networks Each cell consists of a BS and one or
more SS BS provides connectivity to core network
Topology Point to point (PTP) Point to multi point (PTM) Mesh
BS
SSsBS
SSs
BS
SSs
Core Network
WiMAX
WiMAX
WiMAX
ISP PoP
Wi-Fi Hotspots
WiMAX PTP backhaul
WIMAX POINT-TO-POINT BACKHAUL
ISP PoPWire line or Wireless backhaul
WiMAX Base Station
WiMAX point-to-multipoint
Homes with outdoor/indoorWiMAX receiver
POINT TO MULTIPOI
NT APPLICAT
ION
RELATIONSHIP WITH OTHER WIRELESS TECHNOLOGIES3G Mobile-Fi Wi-Fi WiMAX
Max. Speed 2 Mbps 16 Mbps 54 Mbps 100 Mbps
Coverage Several Miles Several Miles 300 feet 50 miles
Airwave Licensed Licensed Unlicensed Either
Advantages Range, Mobility
Speed, Mobility
Speed, Price Speed, Range
Disadvantages
Slow, Expensive
High Price Short Range Interference issues
ADVANTAGES & SECURITY ISSUES
•HIGH SPEED •COVERAGE•MULTI-FUNCTIONALITY• FLEXIBLE INFRASTRUCTURE•MESH TOPOLOGY
•SECURITY:1 .DES (Data Encryption Standard) or AES (Advanced Encryption Standard) 2. PKM ( Privacy Key Management) protocol
DRAWBACKS • Line-of-Sight is required for long distance (5-30 mile) connections.• Heavy rains can disrupt the service.
• Other wireless electronics in the vicinity can interfere with the WiMAX connection and cause a reduction in data throughput or even a total disconnect.• Network complex security issue.• Not many areas have 4G service yet.
APPLICATIONS
Cellular Backhaul- hotspots, PTP back haul
Residential Broadband-fill the gaps in cable and dsl coverage
Underserved Areas-rural areas
Always Best Connected- roaming
SYSTEM FOR 802.16 WIMAX
CONCLUSION WiMAX will no doubt be a viable alternative to DSL and cable connections. There more than 150 commercial trials WiMAX network deployments have taken place worldwide.
In January 2006, Samsung revealed its WiMAX enabled M8000 handset, which connects directly to WiMAX base stations through 802.16e. It will have stiff competition with already establish broadband access technology (DSL & cable modem). WiMAX is the future of ‘WBA technology’.
FUTURE SCOPE
• There are some good reasons for 4G development and a variety of current and evolving technologies to make WiMAX a reality.
FUTURE SCOPE
• MBWA is a technology developed by IEEE 802.20 for true WBA or 4G.
• ‘Broadband Wireless’ internet access via hotspots on hotels, airports, convention centre, coffee shops, restaurants etc. is a fast growing trend.
Surabhi VaishnavM. Tech - DC
(1st Semester, ECE Discipline)
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