Frequency Selective OFDMA Scheduler with Limited Feedback

Ramachandran, V.; Kamble, Vijaya; Kalyanasundaram, Suresh

doi:10.1109/wcnc.2008.287

Cited by 16 publications

(12 citation statements)

References 6 publications

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“…Thus, to find the 'best' chunk(s) for each user, several solutions may be considered. In this section, we consider two common chunk allocation algorithms whose principles are derived from (Ramachandran et al, 2008):…”

Section: Frequency Schedulingmentioning

confidence: 99%

Resource Allocation for Multi-User OFDMA-Based Wireless Cellular Networks

Kténas¹,

Strinati²

2011

Vehicular Technologies: Increasing Connectivity

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Section: Frequency Schedulingmentioning

confidence: 99%

Resource Allocation for Multi-User OFDMA-Based Wireless Cellular Networks

Kténas¹,

Strinati²

2011

Vehicular Technologies: Increasing Connectivity

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“…Priority is granted indeed to UEs selected by standard MCI 'matrix-based chunk allocation' described in (Ramachandran et al, 2008) with l k;n ðiÞ ¼ R k;n ðiÞ. Actually, the matrix contains the metrics l k;n ðiÞ of all possible user-chunk pairs (only for previously unscheduled chunks), where at time i, UE k has a metric for chunk n which is given by l k;n ðiÞ ¼ R k;n ðiÞ.…”

Section: Proposed Green Adaptive Schedulingmentioning

confidence: 99%

Holistic Approach for Future Energy Efficient Cellular Networks

Strinati

Herault

2010

Elektrotech. Inftech.

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Worldwide mobile broadband communications networks are increasingly contributing to global energy consumption. In this paper we tackle the important issue of energy saving by enhancing the energy efficiency of mobile broadband systems thereby reducing CO 2 emissions. We first provide a holistic system view aiming at ensuring that any proposed solutions to improve energy efficiency do not degrade the energy efficiency or performance on any other part of the system. Then, we present a novel scheduling algorithm that improves the scheduling energy efficiency in OFDMA-based wireless cellular networks. Our goal is to reduce the overall downlink energy consumption while adapting the target of spectral efficiency to the actual load of the system and meeting the Quality of Service. Our analysis reveals how the proposed approach permits to achieve notable energy gain over traditional scheduling algorithm especially in not saturated scenarios.Ganzheitlicher Lö sungsansatz fü r zukü nftige energieeffiziente Mobilfunknetze.Weltweite Breitband-Mobilkommunikation trä gt immer mehr zum globalen Energieverbrauch bei. Dieser Aufsatz untersucht die wichtige Problematik des Energiesparens durch Steigerung von Energieeffizienz mobiler Breitbandsysteme. Dies fü hrt letztendlich zur Reduzierung des CO 2 -Ausstoßes. Es wird zunä chst eine ganzheitliche Systemansicht vorgelegt, welche verhindern soll, dass Ansä tze zur Steigerung der Energieeffizienz die Energieeffizienz oder die Dienstleistung anderer Teile des Systems schmä lern. Danach wird ein neuer Scheduling-Algorithmus prä sentiert, welcher die Scheduling-Energieeffiezienz in OFDMA-basierten, drahtlosen, zellularen Netzen erhö ht. Sein Ziel ist, die Gesamtenergieaufnahme des Downlinks unter Einhaltung der benö tigten Spektraleffizienz und Dienstqualitä t zu reduzieren. Analysen zeigen, wie die vorgeschlagene Lö sung beträ chtliche Energiegewinne im Vergleich zu traditionellen Scheduling-Algorithmen, insbesondere in ungesä ttigten Netzen, erzielen kann.

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“…This is the main idea of the top-M scheme being considered in 3GPP LTE. The value of M is same for all UEs and is signaled by BS [7].…”

Section: Modified Top-m Schemementioning

confidence: 99%

A QoS-Aware Resource Allocation Scheme with Limited Feedback in Downlink OFDMA Systems

Xue

Yin

Yue

et al. 2009

2009 5th International Conference on Wireless Communications, Networking and Mobile Computing

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In orthogonal frequency division multiple access (OFDMA)-based systems, base station (BS) can adaptively adjust modulation and coding parameters according to channel quality indicator (CQI) fed back, therefore spectrum efficiency can be significantly improved. In this paper, based on the joint consideration of both quality of service (QoS) difference and spectrum efficiency, we have proposed a novel resource allocation algorithm and a modified top-M feedback scheme for OFDMA-based systems with limited CQI feedback. In order to meet the QoS requirements, users of different traffic types are assigned with different priorities. Simulation results have proved that the proposed allocation algorithm can fully sustain user's requirements under reasonable traffic loads, and simultaneously the feedback load can be greatly reduced.

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Frequency Selective OFDMA Scheduler with Limited Feedback

Cited by 16 publications

References 6 publications

Resource Allocation for Multi-User OFDMA-Based Wireless Cellular Networks

Resource Allocation for Multi-User OFDMA-Based Wireless Cellular Networks

Holistic Approach for Future Energy Efficient Cellular Networks

A QoS-Aware Resource Allocation Scheme with Limited Feedback in Downlink OFDMA Systems

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