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Mobile operators are facing increasing energy prices to operate their networks. At the same time, the demand for broadband wireless access is steadily increasing, driven by the success of smart phones and new services like machine-to-machine communication. In this paper we propose and evaluate a novel asymmetric user assignment scheme, which enables operators to save energy, while satisfying the capacity...
With the introduction of 4th generation mobile networks, applications such as high-quality video streaming to the end user becomes possible. However, the expected demand for such services outpaces the capacity increase of the networks. Since there is mostly a capacity bottleneck in the air interface between a base station and user equipment, one of the main challenges for radio resource management...
Implementing a flexible and modular architecture for scheduled systems will speed-up the deployment of novel and adjustable MACs for cellular systems. Such an architecture will be of great benefit for researchers, vendors and operators by enabling off-the-shelf devices to be used for testing modified MACs, by allowing fast upgrade of existing devices, and by drastically reducing the time-to-market...
Key incentives for mobile operators to offer femtocell services are the possibilities to cost-efficiently enhance indoor coverage and to offload traffic from the macro-cellular network. While femtocells were originally conceived for standalone deployments in user homes, there is an increasing interest in exploiting their advantages also in an enterprise context. However, with the current architecture...
The femtocell concept is an integral part of the telecommunication industry??s efforts to provide high-throughput, high quality services into the users?? home. In contrast to conventional cell types which are well-planned by the operators, femtocell base stations are supposed to be installed by customers themselves, similar to a WiFi access point. Unlike WiFi, however, femtocells operate mainly in...
The future 4th generation IMT-Advanced standards for 3GPP and IEEE 802.16 are LTE-A and IEEE 802.16m, respectively. While at a detailed level IEEE 802.16m and 3GPP LTE-A seem to be significantly different, on a conceptual and functional level both technologies use similar approaches for medium access and radio resource management and are very similar at the PHY layer. In this paper, we analyse both...
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