Resource Allocation for OFDMA Two-Hope Cooperative Cellular Networks: Considering QoS and Fairness Constraints
Journal Title: روش های هوشمند در صنعت برق - Year 2014, Vol 5, Issue 17
Abstract
Joint bit allocation, relay selection and subcarrier assignment are critical for achieving full benefits of OFDM-based cooperative relay networks. In this paper, first such a problem is studied in a dual hop OFDMA cooperative network consisting in multi source nodes, multiple decode-and-forward (DF) relays and a single destination node. The aim is to minimize overall transmission power under the bit-error-rate (BER) and data rate constraints. However, the optimal solution to the optimization problem is computationally complex to obtain and may be unfair. Assuming knowledge of the instantaneous channel gains for all links in the entire network, an iterative three-step resource allocation algorithm with low complexity is proposed. It performs the privileged user selection based on fairness criterion first, and then allocates subcarrier-relay with the given constraints. Finally, power and bit are assigned to the selected subcarriers based on the water-filling algorithm. In order to guarantee the fairness of users, several fairness criteria are also proposed to provide attractive trade-offs between network performance (i.e. overall transmission power, average network lifetime and average outage probability) and fairness to all users. Numerical studies are conducted to evaluate the performance of the proposed algorithm in two practical scenarios. Simulation results show that the proposed allocation algorithm achieves an efficient trade-off between network performance and fairness among users.
Authors and Affiliations
Hemed Bani Zaman
Keywords
Related Articles
- EP ID EP328700
- DOI -
- Views 100
- Downloads 0
Longitudinal Shunt Slot Excitation by Wiggly Ridge Substrate Integrated Waveguide
Application of a substrate integrated waveguide with wiggly ridge shape is presented for excitation longitudinal shunt slot antenna. Two main design equations for design substrate integrated waveguide structure and get p...
Fractional Order PID Controller Design for Level Control of Three Tank System Based on Improved Cuckoo Optimization Algorithm
Fractional-order PID (FOPID) controller is a generalization of standard PID controller using fractional calculus. Compared with the Standard PID controller, two adjustable variables “differential order” and “integral or...
Output Feedback Controller Design for Multi-Agent Systems with Dynamic Heterogeneity in the Presence of Parameter Uncertainty and Exogenous Disturbances
This paper is concerned with network based leader following consensus for a distributed multi agent system with interval time varying delays in the presence of uncertainty and disturbances. A network based consensus cont...
Content-Based Medical Image Retrieval Based on Image Feature Projection in Relevance Feedback Level
The purpose of this study is to design a content-based medical image retrieval system and provide a new method to reduce semantic gap between visual features and semantic concepts. Generally performance of the retrieval...
Neuro-adaptive control in beating heart surgery based on the viscoelastic tissue model
In this paper, the problem of 3D heart motion in beating heart surgery is resolved by proposing a parallel force-motion controller. Motion controller is designed based on neuro-adaptive approach to compensate 3D heart mo...