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Autonomous Inter Cell Interference Avoidance under Fractional Load for Downlink Long Term Evolution | IEEE Conference Publication | IEEE Xplore

Autonomous Inter Cell Interference Avoidance under Fractional Load for Downlink Long Term Evolution


Abstract:

The main source of interference in OFDMA system in downlink is inter-cell interference, which can severely limit the throughput of users near the cell edge. The inter-cel...Show More

Abstract:

The main source of interference in OFDMA system in downlink is inter-cell interference, which can severely limit the throughput of users near the cell edge. The inter-cell interference coordination (ICIC) is one method to improve the performance. In this paper autonomous inter-cell interference avoidance schemes under fractional load (FL) conditions in the downlink for 3rd generation partnership project (3GPP) long term evolution (LTE) are proposed. The proposed schemes do not require any inter-cell signaling for ICIC; rather the decision about the allocation of the spectrum in order to avoid the inter- cell interference is taken based on the information available within the cell itself. We show that the schemes for spectral resource selection is important for FL scenario to avoid high BLER. The proposed schemes further improve the SINR condition therefore higher cell throughput and coverage are realized.
Date of Conference: 26-29 April 2009
Date Added to IEEE Xplore: 12 June 2009
CD:978-1-4244-2517-4
Print ISSN: 1550-2252
Conference Location: Barcelona, Spain

I. Introduction

Within 3GPP the LTE is targeted to improve coverage and increase data rate [1]. The downlink of 3GPP LTE system uses Orthogonal Frequency Division Multiple Access (OFDMA) as the multiple access technique. Due to inherent property of OFDMA the intra-cell interference is avoided however the inter-cell interference remains the main source of interference which limits the system performance, especially at the cell edge, which is extremely sensitive to the interference conditions. Inter-cell interference coordination (ICIC) is one method to improve coverage and increase cell edge bit rate [2]. The ICIC has been extensively studied in the downlink for 3GPP LTE for controlling the interference between the cells in order to improve the cell edge user performance [3].

References

References is not available for this document.