naa a22 4500 510793363 CHVBK 20180411083327.0 cr unu---uuuuu 180411e20130501xx s 000 0 eng 10.1007/s11277-012-0680-9 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0680-9 A Strategy to Reduce the Signaling Requirements of CQI Feedback Schemes [Elektronische Daten] [Leonidas Sivridis, Jianhuan He] Resource allocation in OFDMA systems involves the application of adaptive modulation/coding (AMC). AMC provides the flexibility to match the modulation-coding scheme (MCS) to each user's channel conditions. In order to accurately determine the appropriate MCS level, full channel state information (CSI) is required by the base-station (BS). Full CSI feedback requires bandwidth to be reserved in the OFDM frame which is occupied by the users to transmit channel quality information (CQI) to the BS. Allocations and deallocations of channels reserved for CQI feedback require expensive signaling messages between the base stations and the mobile stations, and therefore should be minimized. In this paper, we show that the amount of bandwidth consumed for this type of signalling can be significantly reduced by selecting the users with the lowest average SNR to periodically feedback their instantaneous channel state information. These benefits become more evident at low values of the user velocity. Springer Science+Business Media, LLC., 2012 OFDMA nationallicence CQI feedback nationallicence Radio resource management nationallicence Sivridis Leonidas School of Engineering, Swansea University, Swansea, UK aut He Jianhuan School of Engineering, Swansea University, Swansea, UK aut Wireless Personal Communications Springer US; http://www.springer-ny.com 70/1(2013-05-01), 85-98 0929-6212 70:1<85 2013 70 11277 https://doi.org/10.1007/s11277-012-0680-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0680-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sivridis Leonidas School of Engineering, Swansea University, Swansea, UK aut NATIONALLICENCE 700 1- He Jianhuan School of Engineering, Swansea University, Swansea, UK aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 70/1(2013-05-01), 85-98 0929-6212 70:1<85 2013 70 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer