Abstract
Researchers are yet to entirely mapped out the difficulty in allocating optimal resources to mobile Worldwide Interoperability for Microwave Access (WiMAX) subscribers. This research presents an optimal scheduling algorithm for WiMAX resource allocation based on an Particle Swarm Optimization (PSO). In this work, sub-group creation is used to offer a PSO-based technique for allocating subcarriers and Orthogonal Frequency Division Multiplexing (OFDM) symbols to mobile WiMAX customers. The WiMAX network environment is organized into seven layers, with seven different modulation and coding algorithms proposed for sending packets to subscribers within each layer. By adopting an improved PSO-based WiMAX resource allocation method, an enhanced model for throughput maximization and channel data rate was implemented. The Aggregate Data Rate (ADR) and Channel Data Rate (CDR) for each scenario were obtained by simulating several scenarios of WiMAX multicast service to mobile users. Based on the performance evaluation of the enhanced algorithm for ADR and CDR, the results for the various layers and uniform distribution of users over the full layers were 350Mbps, 525Mbps, 700Mbps, 1050Mbps, 1050Mbps, 1400Mbps, 1575Mbps, and 1398Mbps. 6.98Mbps, 10.48Mbps, 13.97Mbps, 20.95Mbps, 20.95Mbps, 27.94Mbps, 31.5Mbps, and 28Mbps were also achieved for CDR. The significance of optimal resource allocation is to achieved a maximum ADR and CDR. The results showed a fair distribution of resources within the coverage area of the network.
Highlights
Broadband wireless access has been introduced in response to the growing demand for high-speed multimedia services such as Internet Protocol Television (IPTV) and mobile television [1]-[2]
In point-to-multipoint mode, the Base Station is a single resource controller for bi-directional communication with a collection of Subscriber Stations inside the same antenna sector in a broadcast mode since the nodes are placed in a cellular structure [5] while in the mesh mode there is no transmission from the Base Station, nodes are grouped systematically in an ad-hoc manner, and scheduling is divided among Subscriber Stations
Fobj.t is the objective function of the tth particle in the ith generation ub.kt is the maximum bit rate of the kth layer for the tth particle in the ith generation ukt is the number of users in the kth layer for the tth population in the ith generation Ls.kt is the number of subcarriers allocated to layer k for the tth particle in the ith generation Lo.kt is the number of orthogonal frequency division multiplexing (OFDM) symbols allocated to layer k for the tth particle in the ith generation ⊗ represents element wise multiplication
Summary
Broadband wireless access has been introduced in response to the growing demand for high-speed multimedia services such as Internet Protocol Television (IPTV) and mobile television [1]-[2]. WiMax is an end-to-end network protocol with excellent performance, increased data rate, high fair quality of service (QoS), and highly secure data transfer with less packet latency are some of its characteristics [3], [4]. TDD transmits both uplink and downlink sub-frames at the same time on the same carrier frequency ranges [10]. Both FDD and TDD designs can benefit from the developed technique. Broadband Wireless Access networks have been quickly changing in recent years to meet increasing user scalability and Quality of Service requirements (QoS). The scheduling services and supported QoS parameters are shown in
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