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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 2 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 3 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 4 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 5 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 6 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 7 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 8 9 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 10 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 12 FYP Symposium (ELEC4890A) The University of Newcastle, Australia …Thank you for your attentions… Questions !? 23/6/2005 Copyright: Chung Kei IP 13