Co-Channel Femtocell-Macrocell Deployments-Access Control

Das, Deepak Kumar; Ramaswamy, Venkatesh

doi:10.1109/vetecf.2009.5378946

Cited by 13 publications

(8 citation statements)

References 5 publications

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“…Increasing the number of outside users to access a femtocell have a negative impact on the performance of authorised femtocell users, therefore, the number of outside users to be allowed should be carefully selected. The FAP should have the capability to select this number carefully by keeping in view the performance of users authorised to use that particular femtocell [60], [61]. Detailed explanation of the access modes and its impacts are given in [44], [62].…”

Section: A Access Modesmentioning

confidence: 99%

Interference Management in Femtocells

Zahir

Arshad

Nakata

et al. 2013

IEEE Commun. Surv. Tutorials

323

182

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Abstract-Increase in system capacity and data rates can be achieved efficiently in a wireless system by getting the transmitter and receiver closer to each other. Femtocells deployed in the macrocell significantly improve the indoor coverage and provide better user experience. The femtocell base station called as Femtocell Access Point (FAP) is fully user deployed and hence reduces the infrastructure, maintenance and operational cost of the operator while at the same time providing good Quality of Service (QoS) to the end user and high network capacity gains. However, the mass deployment of femtocell faces a number of challenges, among which interference management is of much importance, as the fundamental limits of capacity and achievable data rates mainly depends on the interference faced by the femtocell network. To cope with the technical challenges including interference management faced by the femtocells, researchers have suggested a variety of solutions. These solutions vary depending on the physical layer technology and the specific scenarios considered. Furthermore, the cognitive capabilities, as a functionality of femtocell have also been discussed in this survey.This article summarises the main concepts of femtocells that are covered in literature and the major challenges faced in its large scale deployment. The main challenge of interference management is discussed in detail with its types in femtocells and the solutions proposed over the years to manage interference have been summarised. In addition an overview of the current femtocell standardisation and the future research direction of femtocells have also been provided.

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Section: A Access Modesmentioning

confidence: 99%

Interference Management in Femtocells

Zahir

Arshad

Nakata

et al. 2013

IEEE Commun. Surv. Tutorials

323

182

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“…However, there are few connectivity optimization solutions for femtocell networks to date, and the need for integration into the D2D LTE-Advanced networks increases motivation to develop better ones [5], [6]. The selection of access control mechanisms for such a network has dramatic effects on the performance of the overall system [7], [8]. For example, controlling the idle or sleep mode of femtocells can improve energy efficiency of femtocell BSs [9].…”

Section: Imentioning

confidence: 99%

Network Connectivity Optimization for Device-to-Device Wireless System with Femto Cells

Gowtham¹

2017

IJRASET

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The demand for high data rate transmission has triggered the design and development of advanced cellular networks, such as 4th generation long term evolution (LTE) networks. However, their poor coverage and relatively high interference can significantly impair data transmission. Femtocell and device-to-device (D2D) communication are promising solutions that have recently gathered interest. Operating in the licensed spectrum, femtocells provide users with higher capacity and coverage than their earlier designs, and they will be offered by cellular operators to enable high-data-rate local services in future LTE Advanced networks. As an underlay to the cellular networks, D2D communication enables nearby devices to communicate directly with each other by reusing cellular resources, which reduces interference in the cellular network compared with communication through base stations. However, the tight integration of femtocells and D2D communication creates a challenge for existing network design and is less studied in the literature. In this paper, we propose an open-access algorithm for femtocell base stations in D2D LTE-Advanced networks, in order to optimize network connectivity. Additionally, a greedy algorithm is proposed to balance macrocell base stations and femtocell base stations to maximize network connectivity. The simulation results demonstrate the effectiveness of the proposed. Keywords: I.INTRODUCTION The ever-increasing demand of user equipment (UE) and applications in cellular networks for higher data rate transmission has triggered design of new advanced cellular networks such as the 4th generation (4G) long term evolution (LTE) network. Studies show that more than 50% of voice calls and 70% of data traffic originate indoors [1]. The mobile operator faces challenges in providing in-building coverage due to poor indoor radio signal penetration and possibly crowded indoor environments such as shopping malls. In the LTE-Advanced networks, the femtocell approach is a potential solution to support higher data rate and reliable services to the subscribers, while allowing the operator to reduce data traffic on the expensive macrocell networks [1]. Femtocells can be employed as short-range, low-cost, and low-power base stations for providing cellular service within the home and enterprise environments [2]. On the other hand, to better support higher data rate local services, the cellular operator can integrate device-to-device (D2D) communication in future 4G LTE-Advanced cellular networks as an underlay. The D2D network is built by D2D UEs that do not communicate with each other via the base station (BS), which is called evolved NodeB (eNB) in the LTE architecture. In D2D networks, UEs instead communicate directly over one or more hops [3]. Enabling a D2D communication mode in cellular networks can improve system performance through better reuse of radio resources and reduced congestion when several UEs located in the same area want to communicate with each other [3]. The tight integration of femt...

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“…Generally, as a secondary underlay which reuses the spectrum resources of the primary system, power allocation of D2D pairs is an important but challenging task to improve the performance of heterogeneous macrocell-femtocell networks [4] [5], since the receivers in this system suffer from threetier interference, i.e., macro-to-device, femto-to-device, and device-to device interference [3]. In previous SINR-thresholdbased power control method [7], only one system, either macrocell or femtocell, has been considered to determine transmit power of D2D pairs, which can be inefficient and impede sufficient deployment of D2D communications.…”

Section: Introductionmentioning

confidence: 99%

Power allocation for D2D communications in heterogeneous networks

Ling

Wang

et al. 2014

16th International Conference on Advanced Communication Technology

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Abstract-In this paper, we study power allocation for D2D communications in heterogeneous networks utilizing game theory approach to improve the performance of the whole system. Given D2D's underlay status in the system, Stackelberg game framework is well suited for the situation. In our scheme, macrocell system and femtocell system are considered as two leaders and D2D pairs are considered as the follower, forming a two-leader-one-follower Stackelberg game. The leaders act first, charging some fees from the follower for using the channel and causing interference to jeopardize their communication equality. The follower observes the leaders' behavior and develops its strategy based on the prices offered by the leaders. We analyse the procedure and obtain the Stackeberg equilibrium, which determines the optimal prices for the leaders and optimal transmit power for the follower. In the end, simulations are executed to validate the proposed allocation method, which significantly improves data rate of user equipments.

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Co-Channel Femtocell-Macrocell Deployments-Access Control

Cited by 13 publications

References 5 publications

Interference Management in Femtocells

Interference Management in Femtocells

Network Connectivity Optimization for Device-to-Device Wireless System with Femto Cells

Power allocation for D2D communications in heterogeneous networks

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