Jiaxi Di

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We consider the power efficiency optimization problem in the cognitive radio (CR) networks under both the average packet delay constraints of each CR transmitter (CR-Tx) and the interference constraint at primary receiver (PU-Rx). We propose a cooperative approach to make each CR-Tx know the interference level at the PU-Rx when there is no central control(More)
The increased capacity and availability of Internet has led to the prosperity of applications. Internet traffic characterization and identification is important for network management. In this paper, based on detailed flow data collected from the public network of Internet Service Provider, the flow graph is constructed to model the interactions among(More)
Nowadays, complex network theory has been widely used in different fields. It is well adapted to analyze various networks with huge scales. This paper uses complex network theory to analyze traffic flows of mobile Internet. By analyzing users and traffic distribution profiles, we find strong correlation between the number of users and the traffic volume per(More)
Nowadays, complex network theory has been widely used in different fields. Many models were proposed for different networks such as Internet or World Trade Web. In this paper, we focus on Internet traffic flows and construct flow graphs from complex network perspective. We propose a novel complex network model for the flow graphs. Besides growth and(More)
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