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To approach green communication effectively, simultaneous wireless information and power transfer (SWIPT) has been exploited in cooperative networks. Different from the conventional battery-free designs in SWIPT, an adaptive harvested power allocation is considered in this paper. In particular, the cooperative nodes obtain both information and power from signals transmitted from the source node via...
Economic transmission planning aims at identifying transmission solutions that reduce system congestion and increase market efficiency. The resulting economic benefits can be quantified by intensive simulations. However, with the rapid increase in the number of transmission proposals for evaluation, the computational requirements may become prohibitive, and therefore it is beneficial to develop an...
In this paper, we propose an efficient timeslot allocation scheme to manage the network resource for a centralized indoor network under 60GHz millimeter-wave unlicensed spectrum. We develop a system model where both AP (access point) and devices are equipped with array antennas to improve the poor link budget in the 60GHz band. And the beamforming weighting vectors defined in the standard of IEEE...
Many-to-one transport results in congestion in wireless sensor networks (WSNs). This is due to the sudden impulse of information flowing to a single destination by single branch. More attention has been paid to congestion control in WSN, but most research works in the past were apt to handle it by controlling output sending rate, and seldom sought solutions on utilizing the idle resources of non-congestion...
In this paper, we propose an efficient power allocation scheme that aims at maximizing the system throughput in joint spectrum overlay and underlay cognitive radio network. We show that our proposed scheme enlarges the achievable throughput region comparing to the overlay strategy, and causes less interference than the underlay strategy. In addition, since the unlicensed users adopting the overlay...
In this paper, we investigate the optimal power allocation strategy in the joint spectrum overlay and underlay cognitive radio network where a licensee and multiple unlicensed users coexist and operate in the same spectrum. We propose an optimal power allocation scheme which achieves the maximum system utility while satisfying the QoS requirement of SUs and interference constrains of the PU. Particularly,...
The next generation of wireless networks, as envisioned by recent advances in cognitive radio (CR) technologies, will be intelligently adjust their configuration to changes in the communication environment. Reconfigurability is set to be an important facet in the evolving world of mobile and wireless communications, through which technologies such as cognitive radio are greatly facilitated. In next...
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