Vahid Haghighatdoost

Amirkabir University of Technology | TUS · Department of Computer Engineering and Information Technology

Price and the quality of service are two key factors taken into account by wireless network users when they choose their network provider. The recent advances in wireless technology and massive infrastructure deployments has led to better coverage, and currently at each given wirelessly covered area there are a few network providers and each have d...

Price and the quality of service are two key factors taken into account by wireless network users when they choose their network provider. The recent advances in wireless technology and massive infrastructure deployments has led to better coverage, and currently at each given wirelessly covered area there are a few network providers and each have d...

Our original work on hetnet pricing

In this paper, we address joint spectrum allocation and pricing problem in heterogeneous wireless access networks. In contrast to traditional static spectrum allocation approach, we model the spectrum as a market commodity, dynamically arbitrated by a regulatory agent with the aim of maximizing the social welfare. This is of particular importance w...

Due to its scarce nature, the limited frequency spectrum must be effectively allocated to competing wireless access technologies. A promising approach is to consider frequency spectrum as a commodity and model the spectrum allocation as a market dynamics problem. Using this approach, we have addressed the competition for frequency spectrum by e.g....

The interference reduction is one of the most important problems in the field of wireless sensor networks. Wireless sensor network elements are small mobile receiver and transmitters. The energy of processor and other components of each device is supplied by a small battery with restricted energy. One of the meanings that play an important role in...

Required resource for nodes in an ad hoc network with specific parameters (e.g. node-count and topology) is one of the most important problems for the manufacturer. In this paper, in the first phase, we showed that according to the proposed game model for the node behaviour, the network converge to a steady state and in the second phase, the proces...

This paper presents a new method for crossover of two tree-shape chromosomes in a genetic algorithm to solve problems that their populations are a set of tree ADTs1. Each tree is a solution of the target problem and in training steps we are looking for the best tree. All Trees of our population have the same nodes with different connections, in oth...

This paper presents a simple but effective algorithm for color image quantization. A growing time adaptive self organizing map (GTASOM) is used to find the color distribution in the three-dimensional RGB color space. The mapping property of self organizing maps from a high dimensional space to a lower dimensional grid is the basic idea in this work...

The interference reduction is one of the most important problems in the field of wireless sensor networks. Wireless sensor network elements are small mobile receiver and transmitters. The energy of processor and other components of each device is supplied by a small battery with restricted energy. One of the meanings that play an important role in...