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This paper considers the model that two mobile users communicate with a central processer (CP) via two base stations (BSs). The BSs are connected to the CP via orthogonal finite-capacity links. The theoretical capacity of this model is still an open problem. For given capacity of backhaul links, we use private message, common message and joint decoding message to explore a new achievable rate. We...
To cope with the ever increasing demand for bandwidth and increasing number of users, future wireless networks will be designed with the radio resource allocation techniques able to get good performance with low complexity and feedback. In this paper we study an allocation problem for OFDMA networks formulated with the objective of minimizing the load of each cell in the system or maximizing the number...
This paper presents a proposal for interference avoidance in Long Term Evolution (LTE) femtocells by using a simple distributed frequency-domain resource allocation and power optimization. A downlink frequency-domain scheduling approach is proposed to roughly separate the macro- and femtocell resource allocation with a small signaling load increase from macrocell to femtocells. The scheduling approach...
In this paper, we propose a simple decentralized frequency-domain resource allocation strategy combined with uplink power optimization for Long Term Evolution (LTE) femtocell base stations (FBSs). We consider femtocells as an underlay network that reuse the existing macrocell spectral bands. The objective of this work is to maximize the uplink throughput of femtocell user equipments (FUEs) without...
Drought has become a great constraint in the process of sustainable development of human society and China is one of the countries frequently affected by severe droughts. Thus, along with research on the drought prediction and prevention, it is of key importance to study how to reasonably allocate the limited water resources during drought. When drought occurs, there is a struggle for water among...
This paper focus on the time optimal control problems with a class of dependent input constraints while all the input channels are dependent on the others. Based on such a class of constraints, a concept of control elimination is introduced, in which the optimal time will not increase when the idle and redundant input channels have been removed. Then, after examining the normality, we prove the existence...
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