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Wireless virtualization is a promising approach to foster innovation and prevent the ossification of wireless networks. Within a virtualized wireless network, multiple network slices, or virtual operators (VO), are co- hosted on the same physical infrastructure. A fundamental question in this environment is which multiplexing technique, TDMA, FDMA or SDMA, should be used to slice the network among...
The software-defined approach of cloud radio access networks (C-RANs) enables supporting multiple virtual operators (VOs) on the same physical infrastructure. In this shared environment, a coordinator is needed to manage the sharing of resources between the VOs. Designing a coordinator is about striking a good balance between the flexibility given to the VOs, and the efficiency of the resource utilization...
Cloud Radio Access Networks (C-RAN) promise to leverage cloud computing capabilities for enhancing the quality and coverage of next generation 5G networks. 5G networks shall witness an increasing density of users and access points, very small latencies, more bandwidth resources, and the use of virtualized hardware for baseband processing. Within such an environment, the problem of scheduling the network...
Cloud Radio Access Networks (Cloud-RAN) promise to leverage cloud computing capabilities to enhance the quality and coverage of wireless networks. A dense network of remote radio heads (RRHs) ensures less attenuation at the receiver side. However, two drawbacks are associated with such dense network: the first is the high energy consumption associated with such a large number of RRHs; the second is...
We study the demand side management (DSM) problem when customers are equipped with energy storage devices. Two games are discussed: the first is a non-cooperative one played between the residential energy consumers, while the second is a Stackelberg game played between the utility provider and the energy consumers. We introduce a new cost function applicable to the case of users selling back stored...
The great potential of multi-cell processing in Coordinated Multi-point (CoMP) transmission is hindered by the limited bandwidth of the backhaul network. In this paper, we tackle this problem from two perspectives. First, we provide a thorough analytical study of the expected capacity when employing zero forcing (ZF) beamforming based on quantized channel state information (CSI). We derive simple...
Congestion in a transportation network is usually the result of either an increase in traffic demand, i.e. the desire of drivers to use the transportation network, or a decrease in traffic supply, i.e. the traffic capacity, which is affected by weather conditions, incidents, etc. In either case, congestion reduces the efficiency of the transportation network and increases the travel time of vehicles...
Coordinated beamforming in multipoint MIMO networks has been introduced to increase the overall capacity of wireless networks. In coordinated beamforming, the channel state information between the different MIMO access points/base stations in one hand, and the mobile stations on the other hand, needs to be shared among the MIMO nodes. A “backhaul” between different MIMO access points is used to transfer...
In this paper, we study the problem of backhaul sharing in Network MIMO. In case of a backhaul of limited number of bits, we investigate how to allocate these bits jointly with the base-stations power among users in order to maximize the sum-rate under fairness constraints. Firstly, we study this problem with the assumption of one user per cell. We find that binary allocation of power is optimal....
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