Cost Effectively Deploying of Relay Stations (RS) in IEEE 802

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Presentation transcript:

Cost Effectively Deploying of Relay Stations (RS) in IEEE 802 Cost Effectively Deploying of Relay Stations (RS) in IEEE 802.16m (WiMAX-2)

ABSTRACT In this thesis the WiMAX RS (relay station) is investigated for the purpose of saving overall cost by decreasing the number of RS to cover the territory of base station and also to provide the services to mobile users out of the range of base station. Secondly, the throughput and delay matrices have been taken to enhance the system performance. In addition to cost effective deployment of RS and evaluation of throughput and delay using relay station, the third factor which is with comparison of QoS classes is also made in order to see the overall performance of WiMAX network. Simulation Tool Used: OPNET 16.0

Thesis Aims Aim: The aim of the thesis is to cost effectively deploy the RS in a WiMAX network and also to takes measures to enhance the QoS and conduct an analysis

Continued…. Research Objectives To acquire detail knowledge of WiMAX and WiMAX2 technology To investigate different methods and techniques for RS deployment in order to cut down the costs. To understand the different problems in maintaining cost effective deployment of RS. To investigate and analyse different QoS characteristics such as throughput, delay, and network load. To investigate and evaluate different techniques to improve overall system performance which provides guaranteed QoS. To assess published major approaches (through literature review) on WiMAX RS planning and optimization. To investigate advance antenna technology and MIMO to further improve coverage and throughput in WiMAX2. To investigate and implement an efficient way to reduce delay and enhance throughput to meet the QoS standard in 802.16m.

Introduction to WiMAX-2 WiMAX2 or IEEE 802.16m is the advance version of WiMAX which is based on its previous version IEEE 802.16e . it supports 300 Mbps data rates. WiMAX forum has name IEEE 802.16m as WiMAX2. WiMAX2 uses the OFDM (orthogonal frequency division multiplex) and other advance antenna technology like MIMO (multiple inputs and multiple outputs) for better performance. The main purpose of IEEE 802.16m WiMAX standard is to improve spectral efficiency, improve VoIP capacity, handover, and speed coverage range. The IEEE 802.16m works with the radio frequency range from 2 to 6 GHz as well as it also supports scalable bandwidth of range 5 to 20MHz

Relay Stations in WiMAX Relay stations enhance the capacity, throughput and coverage area of BS (Base station) in the technologies like WiMAX and LTE.

WiMAX Relay Stations Types and Deployment Scenarios

Proposed Solution In order to provide guaranteed QoS to the users out of the range of BS, four RS are used in rural areas to cover the territory of the BS. Each RS cover additional cell radius to boost the BS signals to the end users which are out of the range

Proposed Solution…… To provide better QoS and minimizing the cost can be achieved by dividing the cell into three sectors and deploying a RS in each sector at QPSK ¾ zones which can be inside the boundary of the cell. Deploying RS at QPSK ¾ zone, the signal strength and SNR will be more as compare to cell edge area or QPSK ½ zones. However, three RS can consider not enough to cover all of the territory of BS as compare to four RS.

Simulation Parameters Relay Stations

Deployment with three RS The main aspect of network planning is to estimate the number of users that each BS may serve and how the bandwidth is allocated to the user’s connections is typically left to operator configuration, which means it depends on the configuration of operators that how much bandwidth they allocate for each end user.

Relay station Deployment with Adaptive modulation and coding

Topology based on different environments

RS Position

RESULTS

Throughput comparisons with four and three RS

The average throughput of three nodes placed at different angles

Average load using three and four RS

Average delay three and four RS

References [1] J Elgered, A.S Moghaddam, and B Vedder, “How Quality of Service (QoS) is achieved in WiMAX (IEEE 802.16)” [2] D Ghosh, a Gupta, P Mohapatra “Adaptive Scheduling of Prioritized Traffic in IEEE 802.16j wireless networks” IEEE International Conference 2009 [3] F.G Sanchez and L Zhao “Efficient Mobile WiMAX Capacity Estimations in a Multihop Environment” November 2008, pp. 1640 -1646. [4] R. Balakrishnan, X. Yang, M. Venkatachalam and Ian F. Akyildiz “Mobile Relay and Group Mobility for 4G WiMAX Networks” IEEE 2011 [5] Y Wang and H Li – “Full Rate and Full Diversity STBC in Decode-and- Forward Relay Systems”. 2010 International Conference [6] H. Dahmouni, H. El Ghazi, D. Bonacci, B. Sansò and A. Girard “Improving QoS of all-IP Generation of Pre WiMAX Networks Using Delay-Jitter Model” VOLUME 2, ISSUE 2, MAY 2010 [7] B AK Can, H Yomo and E De Carvalho “Link Adaptation and Selection Method for OFDM Based Wireless Relay Networks” VOL. 9, NO. 2, JUNE 2007

[8] W. K Jia Y. C Chen “A Cut-Through Forwarding Scheme for Delay Optimization in IEEE 802.16j Simultaneous Transmit and Receive Multihop Relay Networks”. First International Conference 2010. [9] A Belghith and L Nuaymi “Design and Implementation of a QoS-included WiMAX Module for NS-2 Simulator” March 2008 [10] H Chen, X Xie and H Wu “A Queue-aware Scheduling Algorithm for Multihop Relay Wireless Cellular Networks” IEEE 2009 [11] Mohamed Salem, A Adinoyi, H Yanikomeroglu and D Falconer “Opportunities and Challenges in OFDMA-Based Cellular Relay Networks: A Radio Resource Management Perspective” IEEE VOL. 59, NO. 5, JUNE 2010 [12] M Mardani, J S. Harsini, F Lahouti and B Eliasi “Joint Adaptive Modulation- Coding and Cooperative ARQ for Wireless Relay Networks” IEEE 2008

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