scispace - formally typeset
Search or ask a question
Book ChapterDOI

Resource Allocation for Wireless Network Environment

01 Jan 2016-pp 501-508
TL;DR: A graph-based framework is created for the wireless cellular system and an algorithm is applied to allocate Physical Resource Block (PRB) to the system which effectively reduces the ICI which improves the overall network performance.
Abstract: This paper presents a radio resource allocation scheme which can be used for OFDM-based systems to mitigate Inter-Cell Interference (ICI). A graph-based framework is created for the wireless cellular system and an algorithm is applied to allocate Physical Resource Block (PRB) to the system. This effectively reduces the ICI which improves the overall network performance.
Citations
More filters
Proceedings ArticleDOI
01 Feb 2017
TL;DR: In this article, distance based interference mitigation (DBIM) algorithm is proposed to mitigate interference where the locations of user equipment (UEs) and evolved NodeB (eNB) are identified and distances between them are estimated using Haversine Formula.
Abstract: Device-to-device (D2D) communication brings many advantages in underlay cellular networks such as improving spectrum efficiency, energy efficiency and cellular capacity. However, D2D transmission creates interference to the cellular user equipment (CUEs) and other D2D pairs. So, proper resource allocation handling is required to suppress the interference introduced by the addition of D2D user equipment (DUEs) in the existing cellular networks. In this paper, Distance Based Interference Mitigation (DBIM) algorithm is proposed to mitigate interference where the locations of user equipment (UEs) and evolved NodeB (eNB) are identified and distances between them are estimated using Haversine Formula. In this work resources are allocated to UEs based on distance constraints. Further, the significance of D2D communication and simulations to justify the proposed scheme is also presented.

10 citations

Journal ArticleDOI
TL;DR: A dynamic sectorization technique in which eNodeB (eNB) varies the number of sectors dynamically in the network and allocates the Resource Block (RB) to D2D users and improves Signal-to-Interference-Noise-Ratio (SINR) and network performance.
Abstract: Beyond Fifth Generation (B5G) network aims to provide a very high data rate with minimum latency to an ultra-dense user environment. To achieve this demand, the possible approaches are network-centric and device-centric approach. In a network-centric approach, a new frequency band is introduced, and the existing network infrastructure is modified. The device-centric approach does not require any modification in the existing network infrastructure, and the demand of B5G network is achieved through optimum resource allocation methodology. Device-to-Device (D2D) is an effective device-centric approach that supports the B5G network. In this paper, we propose a dynamic sectorization technique in which eNodeB (eNB) varies the number of sectors dynamically in the network and allocates the Resource Block (RB) to D2D users. Sectoring improves Signal-to-Interference-Noise-Ratio (SINR) and network performance. We derive an expression for the probability of successful transmission and threshold to make a decision on the number of sectors based on available RBs and D2D users in the network. Further, dynamic sectoring helps eNB to perform parallel processing for reducing the denial of the request. Simulation results validate the probability of successful transmission of D2D pairs with available RBs and the effectiveness of parallel processing to reduce the denial of request with improved SINR.

9 citations

Journal ArticleDOI
TL;DR: This paper proposes a distance-based interference reduction and power management scheme to reduce the interference on CUEs and evolved NodeB (eNB) and thus improve the sum rate of D2D pairs.
Abstract: With the implementation of device-to-device (D2D) communication in primary cellular networks, there will be notable benefits such as increase in cellular capacity, energy efficiency and spectral efficiency. The interference to the cellular user equipment (CUE), due to D2D pairs is reduced with proper strategies on resource allocation and transmit power assignment to the D2D pairs. This leads to healthier sum rate and battery life of D2D pairs. In this paper, we propose a distance-based interference reduction and power management scheme to reduce the interference on CUEs and evolved NodeB (eNB) and thus improve the sum rate of D2D pairs. The power allocation is based on the D2D pairs distance to the CUEs and eNB, which is estimated based on Haversine formula. The transmit power of D2D transmitter is effectively manipulated with respect to the transmit power of CUEs. The system sum rate, total transmit power of D2D pairs and the battery life of D2D user equipment are analyzed and validated through simulation.

6 citations

Proceedings ArticleDOI
01 Mar 2017
TL;DR: The simulation results prove that the heuristic algorithm approach performs better than then the random selection algorithm with respect to the system capacity, throughput and outage probability.
Abstract: Device to device Communication (D2D) is an inspiring technique for efficient spectrum utilization in the LTE-Advanced (LTE-A) Networks The D2D communication uses the same radio resources intended for the cellular network for its communication which causes interference in the primary cellular networks in their uplink and downlink phases and it can degrade the cellular network performance In order to reduce this interference sourced by D2D communication a heuristic algorithm approach is used in this paper The simulation results prove that the heuristic algorithm approach performs better than then the random selection algorithm with respect to the system capacity, throughput and outage probability

3 citations


Cites methods from "Resource Allocation for Wireless Ne..."

  • ...[1] Suggests a mode shifting resource allocation method for D2D communication some of the applications of this include peer to peer file sharing, online gaming, video streaming etc....

    [...]

References
More filters
Journal ArticleDOI
TL;DR: A transmit power adaptation method that maximizes the total data rate of multiuser orthogonal frequency division multiplexing (OFDM) systems in a downlink transmission and proposes a simple method where users with the best channel gain for each subcarrier are selected and then the transmit power is equally distributed among the subcarriers.
Abstract: In this paper, we develop a transmit power adaptation method that maximizes the total data rate of multiuser orthogonal frequency division multiplexing (OFDM) systems in a downlink transmission. We generally formulate the data rate maximization problem by allowing that a subcarrier could be shared by multiple users. The transmit power adaptation scheme is derived by solving the maximization problem via two steps: subcarrier assignment for users and power allocation for subcarriers. We have found that the data rate of a multiuser OFDM system is maximized when each subcarrier is assigned to only one user with the best channel gain for that subcarrier and the transmit power is distributed over the subcarriers by the water-filling policy. In order to reduce the computational complexity in calculating water-filling level in the proposed transmit power adaptation method, we also propose a simple method where users with the best channel gain for each subcarrier are selected and then the transmit power is equally distributed among the subcarriers. Results show that the total data rate for the proposed transmit power adaptation methods significantly increases with the number of users owing to the multiuser diversity effects and is greater than that for the conventional frequency-division multiple access (FDMA)-like transmit power adaptation schemes. Furthermore, we have found that the total data rate of the multiuser OFDM system with the proposed transmit power adaptation methods becomes even higher than the capacity of the AWGN channel when the number of users is large enough.

1,393 citations

Journal ArticleDOI
TL;DR: A set of proportional fairness constraints is imposed to assure that each user can achieve a required data rate, as in a system with quality of service guarantees, and a low-complexity suboptimal algorithm that separates subchannel allocation and power allocation is proposed.
Abstract: Multiuser orthogonal frequency division multiplexing (MU-OFDM) is a promising technique for achieving high downlink capacities in future cellular and wireless local area network (LAN) systems. The sum capacity of MU-OFDM is maximized when each subchannel is assigned to the user with the best channel-to-noise ratio for that subchannel, with power subsequently distributed by water-filling. However, fairness among the users cannot generally be achieved with such a scheme. In this paper, a set of proportional fairness constraints is imposed to assure that each user can achieve a required data rate, as in a system with quality of service guarantees. Since the optimal solution to the constrained fairness problem is extremely computationally complex to obtain, a low-complexity suboptimal algorithm that separates subchannel allocation and power allocation is proposed. In the proposed algorithm, subchannel allocation is first performed by assuming an equal power distribution. An optimal power allocation algorithm then maximizes the sum capacity while maintaining proportional fairness. The proposed algorithm is shown to achieve about 95% of the optimal capacity in a two-user system, while reducing the complexity from exponential to linear in the number of subchannels. It is also shown that with the proposed resource allocation algorithm, the sum capacity is distributed more fairly and flexibly among users than the sum capacity maximization method.

1,084 citations

Journal ArticleDOI
TL;DR: An overview of the LTE radio interface, recently approved by the 3GPP, together with a more in-depth description of its features such as spectrum flexibility, multi-antenna transmission, and inter-cell interference control are provided.
Abstract: This article provides an overview of the LTE radio interface, recently approved by the 3GPP, together with a more in-depth description of its features such as spectrum flexibility, multi-antenna transmission, and inter-cell interference control. The performance of LTE and some of its key features is illustrated with simulation results. The article is concluded with an outlook into the future evolution of LTE.

886 citations

Journal ArticleDOI
G. Boudreau1, J. Panicker1, Ning Guo1, Rui Chang1, Neng Wang1, S. Vrzic1 
TL;DR: Viable approaches include the use of power control, opportunistic spectrum access, intra and inter-base station interference cancellation, adaptive fractional frequency reuse, spatial antenna techniques such as MIMO and SDMA, and adaptive beamforming, as well as recent innovations in decoding algorithms.
Abstract: This article provides an overview of contemporary and forward looking inter-cell interference coordination techniques for 4G OFDM systems with a specific emphasis on implementations for LTE. Viable approaches include the use of power control, opportunistic spectrum access, intra and inter-base station interference cancellation, adaptive fractional frequency reuse, spatial antenna techniques such as MIMO and SDMA, and adaptive beamforming, as well as recent innovations in decoding algorithms. The applicability, complexity, and performance gains possible with each of these techniques based on simulations and empirical measurements will be highlighted for specific cellular topologies relevant to LTE macro, pico, and femto deployments for both standalone and overlay networks.

748 citations

Journal ArticleDOI
TL;DR: The utility is used in this study to build a bridge between the physical layer and the media access control (MAC) layer and to balance the efficiency and fairness of wireless resource allocation.
Abstract: In this paper, we provide a theoretical framework for cross-layer optimization for orthogonal frequency division multiplexing (OFDM) wireless networks. The utility is used in our study to build a bridge between the physical layer and the media access control (MAC) layer and to balance the efficiency and fairness of wireless resource allocation. We formulate the cross-layer optimization problem as one that maximizes the average utility of all active users subject to certain conditions, which are determined by adaptive resource allocation schemes. We present necessary and sufficient conditions for utility-based optimal subcarrier assignment and power allocation and discuss the convergence properties of optimization. Numerical results demonstrate a significant performance gain for the cross-layer optimization and the gain increases with the number of active users in the networks.

675 citations