Wenbo Wang

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This paper proposes a robust, spectrum-aware routing mechanism for the multi-hop, multi-channel Cognitive Radio Networks (CRNs) that are exposed to the Routing-toward-Primary-User Attack (RPUA). With RPUA, malicious Secondary Users (SUs) attempt to block the data transmission of the normal SUs by routing packets towards the SUs around the Primary Users(More)
The central problem in cognitive radio (CR) is how to adapt, given a wireless environment, so as to operate while meeting the constraints of a primary incumbent in a spectrum band. Adaptation for transmission of real-time multimedia lends itself to a cross-layer approach. This paper discusses a cross-layer CR scheme for real-time multimedia transmission(More)
This paper investigates the energy-efficient power allocation for a two-tier, underlaid femtocell network. The behaviors of the Macrocell Base Station (MBS) and the Femtocell Users (FUs) are modeled hierarchically as a Stackelberg game. The MBS guarantees its own QoS requirement by charging the FUs individually according to the cross-tier interference, and(More)
In recent years, cross-layer Resource Management (RM) has been widely considered as an efficient approach for improving the network performance. However, due to the factors such as limited knowledge about the wireless environment and spontaneous characteristics of device behaviors, designing an efficient distributed RM scheme using the cross-layer paradigm(More)
Recently, the application of Ant Colony Optimization is much wider and it is always the highlight of key algorithm. There are also many improvements about the ACO algorithm, such as: the improvements of algorithm in self-adaptive, the improvements of increasing the diversity of various group, the improvements of enhancing local search, combining with the(More)
In this paper, we present the system level performance analysis of the OFDM for UTRAN system in a multiuser, multicell and multiservice environment. First the OPNET-based simulation platform is introduced and its main modules and major functions are described; then based on this platform the modeling methodologies specified to OPNET and system level(More)