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In this paper, we formulate an optimization problem for resource allocation and scheduling in orthogonal frequency division multiple access (OFDMA) half-duplex decode-and-forward (DF) relay assisted networks. Our problem formulation takes into account artificial noise generation to combat a multiple antenna eavesdropper. The secrecy data rate, power, and sub-carrier allocation policies are optimized...
In this paper, resource allocation and scheduling in an orthogonal frequency division multiple access (OFDMA) downlink network is studied. The considered problem is modeled as an optimization problem which takes into account a multiple antenna eavesdropper and artificial noise generation for secure communications. Power, secrecy data rate, and subcarrier allocation are optimized for maximization of...
In this paper, we propose a distributed adaptive interference coordination algorithm for a practical orthogonal frequency division multiple access (OFDMA)-based mobile cellular systems. The designed algorithm can achieve an efficient frequency reuse for any user distribution and traffic load. Since no a priori frequency planning is required, the minimal coordination between base stations is also achieved...
Multi-cell cooperative transmission schemes are considered as promising candidates in future 4G wireless networks (LTE-Advanced) to combat the inter-cell interference that degrades the cell-edge throughput performance. An efficient proportional fair (PF) scheduling algorithm for Orthogonal Frequency Division Multiple Access (OFDMA) based cooperative cellular networks is proposed. A PF metric maximization...
This paper presents a novel method based on Hopfield neural networks (HNN) for cross-layer dynamical resource allocation in orthogonal frequency division multiple access (OFDMA)-based wireless mesh networks (WMN). The objective is to optimize the maximization of the system throughput using HNN under the conditions of the signal-to-interference-plus-noise ratio (SINR) constraint, power constraint and...
Orthogonal frequency division multiple access (OFDMA) is the access technique adopted in the new generation wireless networks such as WiMAX. In this paper, we consider resource allocation of OFDMA in time division duplex (TDD) mode in which the new transmission frame with multiple time slots is popped up on every pre-specified period. Frame resource is divided into chunks that are composed of a group...
Multihop cellular networks (MCNs) is an extension of single hop cellular networks (SCNs) having benefits of a fixed base station and flexible ad hoc networks. The radio resource management becomes more complex to deal with the routing and resource allocation jointly. In this paper, we have proposed the algorithm which solves the joint subchannel allocation, routing and power allocation problem in...
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