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—The heterogeneous cloud radio access network (H-CRAN) is a promising paradigm which integrates the advantages of cloud radio access network (C-RAN) and heterogeneous network (HetNet). In this paper, we study the joint congestion control and resource optimization to explore the energy efficiency (EE)-guaranteed tradeoff between throughput utility and delay(More)
—The cloud radio access network (C-RAN) provides high spectral and energy efficiency performances, low expenditures and intelligent centralized system structures to operators, which has attracted intense interests in both academia and industry. In this paper, a hybrid coordinated multi-point transmission (H-CoMP) scheme is designed for the downlink(More)
The dynamic optimization problem for radio resource allocation in two-tier heterogeneous networks (HetNets) under the hybrid access mode is researched in this paper. To make the average utility of user throughput arbitrarily close to the optimum and maintain system queue stability under instantaneous and average power constraints, radio resource allocation(More)
—The heterogeneous cloud radio access network (H-CRAN) is a promising paradigm which incorporates the cloud computing into heterogeneous networks (HetNets), thereby taking full advantage of cloud radio access networks (C-RANs) and Het-Nets. Characterizing the cooperative beamforming with fronthaul capacity and queue stability constraints is critical for(More)
Successful islet isolation is crucial for islet transplantation and cell treatment for type 1 diabetes. Current isolation methods are able to obtain 500-1,000 islets per rat, which results in a waste of ≥50% of total islets. In the present study, a facile mechanical shaking method for improving islet yield (up to 1,500 per rat) was developed and summarized,(More)
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