Transcript Implementing IEEE802.16 WiMAX in OPNET

FYP Symposium (ELEC4890A)
The University of Newcastle, Australia
Implementing IEEE802.16
WiMAX standard in OPNET
Present by : Chung Kei IP, Gabriel (2111640)
Supervisor : Dr. Jamil Khan
creating the IEEE 802.16 WirelessMAN™ Standard for Wireless Metropolitan Area Networks
23/6/2005
CopyRight: Chung Kei IP
FYP Symposium (ELEC4890A)
The University of Newcastle, Australia
Outline
 Scope of the project
 Overview of WiMAX
 Project background
 IEEE802.16 MAC layer descriptions
 Method of implementation - OPNET
 Current status and results
 Future work
Outline
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FYP Symposium (ELEC4890A)
The University of Newcastle, Australia
Scope of Project
Design and develop simulation model using OPNET
simulation package for the IEEE802.16 WiMax
standard
Concentrate on Medium Access Control (MAC)
layer protocol and functionalities
With a single base station (BS) services multiple
subscriber stations (SSs) simultaneously
Analyse the performance of the WiMax network
and obtain traffic statistics form different
types of scenarios under multi-user environment
Scope | Background & Overview | MAC layer | Method | Current & Future | Summary
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FYP Symposium (ELEC4890A)
The University of Newcastle, Australia
Overview of WiMax
What is WiMax??
Worldwide Interoperability for Microwave Access
The commercialization of IEEE802.16 standard
Technology based on evolving standard for point-tomultipoint wireless broadband networking
Solution for Wireless Metropolitan Area Network
BWA (Broadband Wireless Access) solution
Why need WiMax??
Alternative from DSL broadband access services –
expensive installation cable in long distance
Provide Internet service in rural areas – up to 31
miles from base station with high data rates
Fixed “last mile” problem
Scope | Overview & Background | MAC layer | Method | Current & Future | Summary
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FYP Symposium (ELEC4890A)
The University of Newcastle, Australia
Project background
Two basic scenarios to be simulated
Scope | Overview & Background | MAC layer | Method | Current & Future | Summary
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FYP Symposium (ELEC4890A)
The University of Newcastle, Australia
MAC layer in WiMax
Connection oriented
Protocol independent core (ATM, IP, Ethernet,…)
Point-to-Multipoint (PMP) in downlink direction (BS ->
SS), and point-to-point in uplink direction (SS -> BS)
Time Division Multiple Access (TDMA) in downlink
direction, Time Division Multiplexing (TDM) in uplink
direction
Supports both Time Division Duplexing (TDD) and
Frequency Division Duplexing (FDD) schemes
For FDD,
Downlink & uplink on separate RF channels
Static asymmetry
Half duplex – SS does not transmit & receive simultaneously (low cost)
Scope | Overview & Background | MAC layer | Method | Current & Future | Summary
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FYP Symposium (ELEC4890A)
The University of Newcastle, Australia
Method of implementation
What is OPNET?
Powerful and professional network simulation software
Based on C/C++ programming language
Object oriented
Combine with different models – network model (top
level), node model (middle level) and process model
(bottom level)
Be able to obtain and analysis different traffic
statistics
Scope | Overview & Background | MAC layer | Method | Current & Future | Summary
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FYP Symposium (ELEC4890A)
The University of Newcastle, Australia
WiMax Model
Basic WiMax model (network model)
BS and SS connect to two common
buses, one for Tx., and one for Rx.
Node mode and process model are
built inside
MAC layer implementation (node model)
Two transmitters and receivers
directly connected to the MAC node
Node model that is built inside the
network model above
Next to see the conceptual model for the WiMax network
Scope | Overview & Background | MAC layer | Method | Current & Future | Summary
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FYP Symposium (ELEC4890A)
The University of Newcastle, Australia
Current progress and results
Learning OPNET programming language, and
obtain experiences in building OPNET models
Structuring on how to build the node model
and the process model of MAC layer
Modifying the source-sink model so the it is
able work under wireless environment between
2 nodes (in network model)
Modifying the source-sink model with a
single BS with communicates with multiple
SSs.
Scope | Overview & Background | MAC layer | Method | Current & Future | Summary
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Source-sink model
Network model
Process model (Source)
Node model
Process model (Sink)
FYP Symposium (ELEC4890A)
The University of Newcastle, Australia
Future work
Design and implement the model with MAC layer
functionalities, together with necessary frames,
subframes and packet formats
Implement the MAC layer model into BS and
firstly communicates with a single SS, then to
multiple SSs
Obtain traffics statistics from different
scenarios
Scope | Overview & Background | MAC layer | Method | Current & Future | Summary
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FYP Symposium (ELEC4890A)
The University of Newcastle, Australia
…Thank you for your attentions…
Questions !?
23/6/2005
Copyright: Chung Kei IP
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