wimax-huawei
TRANSCRIPT
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
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www.huawei.com
WiMAX Overview
CDMA Team
In Wireless Network General Engineer's Office
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WiMAX is a broadband radio access
technology based on the IEEE 802.16
protocol. To apply this technology, you need
to be familiar with the basic concepts and
technology benefits of WiMAX.
This document describes the basic concepts,
application scenarios, and network structure
of WiMAX.
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After learning this document, you will be
capable of:
Being familiar with the basic concepts
and associated protocols of WiMAX
Being familiar with the application
scenarios and technology benefits of
WiMAX
Being familiar with the network
structure of WiMAX
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Chapter 1 Basic Concepts of WiMAXChapter 1 Basic Concepts of WiMAX
Chapter 2 Application Scenarios of
WiMAX
Chapter 3 Network Structure of
WiMAX
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Development of Radio Communication
2G 2.5G 3G
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Development Background of WiMAX
5
60
120
(Km/h)
BWA (WiMAX 802.16d, 802.16e)
(GSM, UMTS, CDMA, HSDPA)
Data Rate
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Basic Concepts of WiMAX
Worldwide Interoperability for Microwave Access
IEEE 802.15 – Bluetooth
WAN
MAN
LAN
PAN ETSI HiperPAN
IEEE 802.11 – Wireless LAN
ETSI HiperLAN
IEEE 802.16-Wireless MAN
ETSI HiperMAN & HiperAccess
IEEE 802.20(proposed)
3GPP,3GPP2
Worldwide Interoperability for Microwave Worldwide Interoperability for Microwave Access (WiMAX)Access (WiMAX)
WiMAX based on the IEEE802.16 protocol is a broadband wireless technology applied to the Metropolitan Area Network (MAN).
It complies with the "Broadband + Wireless" trend. WiMAX features the Orthogonal Frequency Division Multiplex Access (OFDMA), Multiple Input Multiple Output (MIMO), and other advanced technologies to maintain its broadband advantage.
It is called "3.5G" or "4G" technology. In October of 2007, it becomes the fourth standard of 3G technology.
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Protocols
WiMAX is based on the 802.16 protocol that has two
standards:
802.16dFixed broadband radio access standard
It specifies the air interface layer between the fixed
access terminals and the BTS.
802.16eMobile broadband radio access standard
It supports the mobile station.
It supports both the fixed broadband radio access
system and mobile broadband radio access system.
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Technical Specifications of WiMAXTechnical
Specification 802.16d 802.16e
Bandwidth (MHz) 1.75-20 1.25-20
Frequency (GHz) 2-11 2-6
Mobility Fixed or roaming Middle-rate mobile station (<120 km/h)
Transmission technology
Multi-carrier, OFDM Multi-carrier, OFDMA
Multiple access OFDMA
Spectrum assignment unit
Sub-channel
Duplex mode TDD,FDD
Peak rate (Mbit/s) 75 Mbps (20 MHz) 15 Mbps (5 MHz) , 30 MHbps (10 MHz)
Modulation mode DL:BPSK,QPSK,16QAM,64QAM ;UL:BPSK,QPSK,16QAM
Inter-cell handovers No Yes
Enhanced technology Intelligent antenna, MIMO, HARQ, AMC
Access control The BS periodically allocates bandwidths to the MS and provides opportunities for periodic unicast polling. The MSs access the network based on the priority.
QoS Supporting five QoS class standards, including UGS, ERtPS, RtPS, NrtPS, and BE
Battery saving mode No Supporting idle and sleep modes
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Technical Benefits of WiMAX
Advanced technical functionsIt incorporates multiple technologies, including OFDMA, MIMO, AMC, and HARQ.
Wide coverage and high throughputThe maximum coverage distance of a BS is 50 km. The typical coverage distance is six km to ten km. The maximum throughput of each sector is 75 Mbit/s.
Easy to expandIt is easy to add new sectors.It is easy to plan the channel bandwidth.
Low risks of overhead and investment
Broadband access
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Global Spectrum Distribution of WiMAX
2.3 ,2.5 ,3.5GHz2.3 ,2.5 ,3.7
GHz
2.5 ,3.5GHz
2.5 ,3.5GHz
3.5GHz
2.3 ,2.5 ,3.5
GHz
2.3 ,2.5,3.3,
3.5GHz
2.3G 2.3 - 2.4 GHz
2.5G 2.496 - 2.690 GHz
3.5G 3.4 - 3.6 GHz
Primary frequency bands:
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Comparison Analysis of WiMAX/EV-DO/HSDPA
Technology WiMAX 1x EV-DO HSDPA
Standard IEEE 802.16e CDMA-2000 WCDMA/UMTS
Throughput 30 Mbit/s(10MHzbandwidth)
2.4 Mbit/s 2 Mbit/s (HSDPA supports more than10 Mbit/s throughput.)
Coverage range
Typical: 6 km to10 km Typical: 2 km to 5 km Typical: 2 km to 5 km
Frequency 2 GHz to 6 GHz 400 MHz, 800 MHz, 700 MHz, 900 MHz, 1800 MHz, 2100 MHz
900 MHz, 1800 MHz, 2100 MHz
Bandwidth 1.25 MHz to 20 MHz 1.25 MHz 5 MHz
Core technology of the physical layer
OFDMA, MIMO/AAS, AMC CDMA, AMC CDMA, AMC
Duplex mode TDD FDD FDD
Mobility Low speed(<120km/h) High speed High speed
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IEEE 802.16 Working Group
IEEE 802.16 Working Group
In 1999, the IEEE working group is set up, which studies the
broadband radio access technology standard. The aim of this
group is to establish a global broadband radio access standard.
This group sets down the broadband access system standards,
including the air interface standards and associated standards.
At the beginning of 2003, this group issues the 802.16a
standard that defines the 2 GHz to 11 GHz NLOS fixed access
system.
On October 1 of 2004, this group issues the 802.16d fixed
access standard. In the end of 2005, this group issues the 802.16e standard.
Now, the 802.16e Release3 has been issued.
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WiMAX Forum
In April of 2001, the WiMAX forum is set up. This forum participates in
authenticating the standardization and interoperability of the broadband
radio access products based on IEEE 802.16 and ETSI HiperMAN.
This forum is organized by many radio communication equipment suppliers,
component suppliers, operators, which is a nonprofit organization.
In November of 2004, the Network Working Group (NWG) is set up, which
participates in setting downing the network standards for the IEEE 802.16d
and IEEE 802.16e.
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Structure of WiMAX Forum
The WiMAX forum is set up for the purpose of push and accelerate the process of commercialization of the high-quality broadband radio service.
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Chapter 1 Basic Concepts of
WiMAX
Chapter 2 Application Scenarios of Chapter 2 Application Scenarios of
WiMAXWiMAX
Chapter 3 Network Structure of
WiMAX
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NomadicFixed Simple Mobility
Full-rate Mobility
Application Scenarios of WiMAX
Portable
Fixed(16d/16e)
Nomadic(16e)
Portable(16e)
Simple Mobility( 16e)
Full-rate Mobility ( 16e)
Application
Application in buildings,application in the high-level residences
Family indoor access,terminal access(It does not support handovers.)
Family outdoor access,Mobile terminal access(It supports handovers.)
Medium-rate terminal access
high-rate terminal access
Terminal CPE PCMCIA, USB module
PCMCIA, USB module, embedded portable terminal
PDA , mobile terminal
Mobility No No > 5 km/h > 60 km/h >120 km/h
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QoS-Based Services
Unsolicited Grant Service (UGS) – VoIP (without silence suppression)
Extended Real-time Polling Service (ertPS) – VoIP with silence
suppression
Real-time Polling Service (rtPS) – MPEG video
Non-real-time Polling Service (nrtPS) – FTP service
Best Effort (BE) – network browse, e-mail
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Development of the WiMAX Product
Equipment supplier BWA manufacturer Chip manufacturerterminal
manufacturer
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Chapter 1 Basic Concepts of
WiMAX
Chapter 2 Application Scenarios of
WiMAX
Chapter 3 Network Structure of Chapter 3 Network Structure of
WiMAXWiMAX
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End-to-End Network Structure of WiMAX
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Network Elements of WiMAX MSS - Mobile Subscriber Station ASN - Access Service Network
The ASN consists of the base station (BS) and the Access Service Network-
Gateway (ASN-GW). The ASN manages the IEEE 802.16e air interface and
enables the MS to access multiple CSNs.
CSN - Connect Service Network
The CSN is connected to the Internet, ASP, PLMN, and other networks. It
provides Authentication, Authorization and Accounting (AAA), roaming
between different (Network Service Providers) NSPs, IP address management,
location management, mobility management, connection for multiple
services, policy management, and QoS management.
NAP- Network Access Provider
NSP- Network Service Provider
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WiMAX NWG-ASN Profile A
ASN-GWBS
R2
•RRA•Auth. Relay•Key Receiver
•HO •Authenticator•RRC•Key Distribute•PC
•Centralized ASN model •Semi-Flat Architecture•HO and RRC are at GW•Profile A with standard
R1,R2 ,R3,R4
CSNASN
R1
AirInterface
BS
BS
ASN-GW
ASN-GWHA AAA
R6 R3
R4
Internet
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WiMAX NWG-ASN Profile B
•Distributed ASN solution;•Flat Architecture;•BS and ASN-GW function is embedded in BS;•Profile B with standard R1, R2, R3, R4;
•HO•PA•RRA+RRC•Key Receiver + Distribute
•AAA Client •DHCP Proxy•Authenticator•PC
Combined BS+ASN-GW
Internet
R2
R1
AirInterface
BS+ASN-GW
BS+ASN-GWHA AAA
R3
R4
CSNASN
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WiMAX NWG-ASN Profile CCSNASN
ASN-GWBS
•HO•RRA+RRC•Auth. Relay•Key Receiver
•Authenticator•Key Distribute•PC
•AAA Client •DHCP Proxy•MIP FA
•Centralized ASN model;•Semi-Flat Architecture;•HO and RRC are at BS;•Profile C with standard R1,R2 ,R3,R4,R6;
Internet
R2
R1
AirInterface
BS
BS
ASN-GW
ASN-GWHA AAA
R6
R3
R4
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Interface Introduction
Interface
Description
R1 R1 interface between the MS and the ASN as the air interface specification for (PHY and MAC)
R2 R2 is the interface between the MS and the CSN associated with Authentication, Service Authorization, IP Host configuration management, and mobility management. R2 is a logical interface and does not reflect a direct protocol interface between the MS and CSN.
R3 R3 is the interface between the ASN and CSN to support AAA, policy enforcement and mobility management capabilities. In addition, R3 encompasses the bearer plane methods (e.g., tunneling) to transfer IP data between the ASN and the CSN.
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Interface Introduction
Interface
Description
R4 R4 consists of a set of control and bearer plane protocols originating and terminating in various entities within the ASN that coordinate MS mobility between ASNs.
R5 R5 consist of a set of control plane and bearer plane protocols for interworking between CSNs
R6 R6 provides the communication between the BS and the ASN GW which provides a set of control and bearer plane protocols.
R8 R8 is a set of control plane message flows and in some causes, bearer plane data flows between the BS to ensure fast seamless handover.
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Networking Features of WiMAX
Independent networking
Hybrid networking with 2G/3G
Easy to construct the network
Low cost
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Networking Solution of WiMAX
MSS
ASN
CSN
ASN-RANBS : BBU BBU3703 RRU RRU3701CFunctions: The BS receives and transmits radio signals and thus enables the communication between the WiMAX network and the MS.
ASN-GW WASN9770
Functions: The ASN-GW forwards packet data, and provides access control, QoS management, traffic management, and accounting management.
Internet
IMS/NGN
Home AgentPolicy Decision Function
AAA
iManager M2000
WASN9770
BTS3706
WASN9770
BTS3706
RRU3701C
BBU3703
RRU3701C
BBU3703
PCMCIA HandsetFixed Access
PSTN
ASN
CSN
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BTS3703Specification Distributed BTS Profile A Channel Bandwidth: 5 MHz or 10 MHz Frequency: 2.3 G, 2.5 G, or 3.5 G MIMO: 2 x 1 Transmit power: 10 W/20 W (3.5 G or 2.5 G) Weight
BBU: 5 kgRRU: 22 kg or 15 kg
Dimensions (width x depth x height) (mm)BBU: 436 x 300 x 42RRU: 430 x 176 x 571(with rack) 350 x 125 x 440(without rack)
Capacity (single cell):Number of BTSs: 1 to 3Throughput: 30 Mbit/s (10 MHz)
15 Mbit/s (5 MHz) Service port: FE/GE
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DBS3900 WiMAXSpecificationCompatible with RRU3701C.Distributed BTS, and based on HERT platform. Profile C Channel Bandwidth: 5 MHz,10 MHz, 7MHz Frequency: 2.3 G, 2.5 G, or 3.5 G MIMO: 2 x 2 Weight
BBU: <=11 kg with full configuration
Dimensions (width x depth x height) (mm)
BBU: 442 x 310 x 86 Supports six RRU at most with configuration S222.
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pBTS3701
SpecificationChannel Bandwidth: 5 MHz,10 MHz Frequency: 2.5 G MIMO: 2 x 2 Weight <=2.5 kg Dimensions (width x depth x height) (mm)
230 x 165 x 65.2Capacity (single cell)
DL: 28MbpsUL: 7Mbps
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WASN9770
N68-22service cabinet, dimensions: 2200 mm x 600 mm x 800 mm
Components: WASN rack (mandatory) Power distribution box
(mandatory) LAN switch (optional) Fire wall (optional)
In the case of dual-plane networking, both the LAN switch and firewall can be used.
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