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The rise in mobile data traffic demands from indoor users (UEs) coupled with poor cellular coverage in indoor environments, triggering the growth of Femto cell deployments. However, due to densification of Femtos, frequency reuse one, and lack of coordination among Femtos in LTE HetNets, cell-edge users of Macro cells, who are in the vicinity of Femtos, get affected by cross-tier interference of the...
Next generation wireless networks face the challenge of increasing energy consumption while satisfying the unprecedented increase in the data rate demand. To address this problem, we propose a utility-based energy-efficient resource allocation algorithm for the downlink transmissions in heterogeneous networks (HetNets). We consider the fractional frequency reuse (FFR) method in order to mitigate the...
In this paper, we propose a dynamic decentralized scheme, namely, the Multi-Objective Harmony Search (MO-HS). The proposed scheme improves on the conventional single-objective HS scheme by attempting to optimize two objective functions simultaneously. In particular, the MO-HS scheme attempts to minimize the use of the same channels by edge users in neighboring cells, and the average cell interference...
The recent development of mobile terminals, the proliferation of mobile applications and the increasing need for mobile data have led to a dense deployment of mobile networks. In this context, the Long Term Evolution (LTE) standard is adopted by a large number of mobile network operators. LTE uses Orthogonal Frequency Division Multiple Access (OFDMA) technique on the downlink of the radio interface...
In this paper, we investigate power control and resource allocation for long-term evolution (LTE) uplink. We develop an efficient way to improve system performance, especially for those users at cell-edge by taking interference to and from adjacent cells into consideration. Simulation results show that the spectrum efficiency of edge users is improved by about 20% over the independent resource allocation...
The standardization of the long term evolution (LTE) of 3G networks is currently carried through in 3GPP. With the deployment of frequency planning, the coexistence issue between TDD and FDD LTE systems is becoming urgent in certain frequency bands. In this paper, the detailed LTE system interference environment is investigated, including single system scenario and inter-system interference, network...
3GPP has recently agreed on an Open Loop Power Control (OLPC) for the uplink in UTRAN Long Term Evolution. The power control configuration determines the level of interference in the system, but requires to be tuned depending on the propagation scenario, user's bandwidth, etc. A reliable knowledge of the interference would be very useful for the operator to determine the maximum link budget for a...
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