Expanding Cellular Coverage via Cell Edge Deployment in Heterogeneous Networks Spectral Efficiency and Backhaul Power Consumption Perspectives[omnet++program]

Expanding Cellular Coverage via Cell Edge Deployment in Heterogeneous Networks  Spectral Efficiency and Backhaul Power Consumption Perspectives

There has been a paradigm shift in the design criteria of future networks, with the th generation mobile system focusing on providing higher data rates, Expanding Cellular Coverage via Cell Edge Deployment in Heterogeneous Networks Spectral Efficiency and Backhaul Power Consumption.Expanding Cellular Coverage via Cell Edge Deployment in Heterogeneous Networks  Spectral Efficiency and Backhaul Power Consumption Perspectives[omnet++program] Perspectives lower latency, energy efficiency , increased number of simultaneous active mobile users, and last but not the least, improvedperformance at cell-edges. Expanding Cellular Coverage via Cell Edge Deployment in Heterogeneous Networks Spectral Efficiency and Backhaul Power Consumption Perspectives However, the spectral efficiency of the cell-edge mobile user is often very poor and degrades the overall network capacity and coverage.

Expanding Cellular Coverage via Cell Edge Deployment in Heterogeneous Networks Spectral Efficiency and Backhaul Power Consumption Perspectives This is due to higher path-loss effects at the cell-edge since the received signal power at the mobile user decays exponentially with distance from the associated base station BS , usually located at the center of the macrocell. Expanding Cellular Coverage via Cell Edge Deployment in Heterogeneous Networks Spectral Efficiency and Backhaul Power Consumption Perspectives Different vital technologiessuch as carrier aggregation, improved multiple-input multiple-output MIMO schemes e.g. massive MIMO and coordinated multipoint communication CoMP , among others, have been explored to address these stringent requirements.

Expanding Cellular Coverage via Cell Edge Deployment in Heterogeneous Networks  Spectral Efficiency and Backhaul Power Consumption Perspectives

 

Small-cells, such as femtocells, relays, and distributed antennas Das , Expanding Cellular Coverage via Cell Edge Deployment in Heterogeneous Networks Spectral Efficiency and Backhaul Power Consumption Perspectives are deployed within a macrocell to improve the network coverage and SE of certain spots within the macrocell coverage. The resultant network is referred to as a heterogeneous small-cell network HetNet . HetNets offer wireless coverage in environments with extensive diversity, ranging from outdoor to indoor environments such as office buildings, Expanding Cellular Coverage via Cell Edge Deployment in Heterogeneous Networks Spectral Efficiency and Backhaul Power Consumption Perspectives homes, and underground areas. Although the macrocell BS deployment requires cautious network planning, small-cell deployment does not essentially need more than geographic knowledge of the hotspots. Hence, the deployment of small-cells is relatively ad-hoc to serve areas with high traffic density and to improve coverage. HetNets enable flexible and low-cost deployments, thereby providing a uniform broadband experience to mobile users anywhere within the network, especially the cell-edge mobile users. A promising way of increasing the achievable rate in cellular communications is direct communication between closely located users, termed device-to-device DD communication. Mobile devices involved in DD communication form a direct link with each other without the need to route data via the cellular access network, resulting in lower transmit power and end-to-end delay, as well as freeing networkresources. DD communication also exhibits the gains of offloading traffic from the core network, usage of both uplink and downlink resources, and extending the coverage area of cellular networks.

A typical HetNet with multiple small-cell technologies and DD communication supporting the macrocell network architecture is shown in . The large cell provides ubiquitous coverage to the mobile users relatively closer to the macrocell BS, while the small-cell network elements such as femtocells, relays, and DAs bring connectivity closer to the mobile users, thereby increasing the achievable capacity in the system. The DD communication links, on the other hand, bring about a localized communication, where closely located mobile users are able to communicate and exchange data in an efficient and cost effective way. This article discusses the cell-edge deployment of small-cells and DD communication around a macrocell such that the resultant configuration is referred to as cell-on-edge COE configuration for the SBSs and D2D-communication- on-edge DCOE for DD communication, and also determines, based on simulation results, the preferable cell-edge deployment configuration in terms of the achievable SE.