Wenbo Wang

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—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)
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 addresses the problem of spectrum sharing and power allocation in M2M network, in which a licensee and multiple unlicensed M2M devices coexist and operate in the licensed channel in a local area. We develop a connectivity establishment mechanism in M2M network based on the cognitive radio technology, and derive the overall average probabilities(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)
—The framework of cognitive wireless radio is expected to endow the wireless devices with the cognition-intelligence ability, with which they can efficiently learn and respond to the dynamic wireless environment. In many practical scenarios, the complexity of network dynamics makes it difficult to determine the network evolution model in advance. As a(More)