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The cloud radio access network (C-RAN), which is a novel technology in 5G wireless architecture, has been recently proposed. Resource allocation can utilize resources more efficiently, which generates a lot of researches in C-RAN architecture. In this paper, we deeply investigate the resource allocation in C-RAN with fronthaul capacity constraints, the concept of deploying cache on RRHs in the traditional...
In cognitive radio (CR) systems, efficient spectrum sensing ensures secondary users (SUs) to successfully access the spectrum hole. Typically, the detection problem has been studied separately from the optimization of throughput of secondary network. However, due to non-zero probabilities of miss detection and false alarm, the sensing phase has an impact on the throughput of CR networks as well as...
The two-tier femtocell network is comprised of a central macrocell underlaid with shorter range femtocell hotspots. Due to the universal frequency reuse, this kind of new system architecture brings about urgent problems of the interference management and the resource allocation. Motivated by these problems, the following contributions are made in this paper: 1) a novel joint power and subchannel allocation...
In this paper, we consider a four-node relay-based OFDMA system. The expression of the upper bound for the achievable rate in Successive Relaying (SUR) protocol is derived by using the cut-set theorem for half-duplex systems. Based on this expression, the near-optimal solution of the achievable rate is obtained in the joint power and subcarrier allocation constraint, according to the dual problem...
The problem of resource allocation in multiuser OFDM system is a combinatorial optimization problem, difficult to solve in polynomial time. For the sake of reducing complexity, it can be solved either by relaxing constraints and making use of linear algorithms or by metaheuristic methods. In this paper, ant colony optimization, a typical algorithm of metaheuristic methods, is applied to solve the...
When the framework of next-generation network (NGN) is built upon bio-network, the SLEE domains and dispatched business processes gain the capability to be aware of the computation resources and communication loads. The dispatcher of NGN then can optimize the loads among domains by balancing the resources and communication bandwidth. First, a model is built. Second, the simulation results show its...
Efficient radio resource allocation is essential to provide quality of service (QoS) for wireless networks. In this paper, a cross-layer resource allocation scheme is presented with the objective of maximizing system throughput, while providing guaranteed-QoS for users. With the assumption of a finite queue for arrival packets, the proposed scheme dynamically allocates radio resources based on user's...
In this paper, an efficient resource management scheme applied to heterogeneous services scenario in multiple- input and multiple-output/orthogonal frequency division multiplexing (MIMO/OFDM) system is proposed. The design of the scheme is to maximize the system throughput while guaranteeing QoS requirements for users. At medium access control (MAC) layer, an urgency-factor based scheduler is designed...
This driven by the need to promote a more efficient use of radio resources and improve the operators' profits, resource allocation has turned into a joint technical and economical problem. At the same time, as a possible enabling solution, game theory has been applied to either dynamic spectrum access (DSA) or joint radio resource management (JRRM) in wireless communication research recently. In this...
The inter-cell interference of orthogonal frequency division multiple access (OFDMA) based multi-cell distributed network architecture is analyzed. Based on generalized distributed cellular architecture-group cell, the interference condition without power control and with power control is analyzed respectively, and the system outage probability compared to traditional cellular structure is evaluated...
The optimal control of complex distributed systems is of great significance and of extreme difficulty. This paper presents a novel generalized particle model (GPM) to optimally control the resource allocation and task assignment in complex distributed systems. The GPM approach transforms the optimal control process of complex distributed systems into the kinematics and dynamics of massive particles...
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