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Downlink Scheduling and Rate Capping for LTE-Advanced Carrier Aggregation

¹ LTE System Design & Architecture, Nokia Siemens Networks, Beijing, China
² LTE System Design & Architecture, Nokia Siemens Networks, Beijing, China
³ LTE System Design & Architecture, Nokia Siemens Networks, Beijing, China

Communications and Network·Volume 05 (2013)·Pages 1–5·Published 27 September 2013·DOI10.4236/cn.2013.53B2001

Abstract

Long Term Evolution (LTE) Carrier Aggregation (CA) was introduced by the Release-10 3GPP specifications. CA allows aggregation of up to 5 cells for a terminal; both downlink (DL) CA and uplink (UL) CA are supported by the 3GPP specifications. However, the first commercial deployments focus on the aggregation of two cells in the downlink. The benefits of LTE CA are increased terminal peak data rates, aggregation of fragmented spectrum and fast load balancing. In this paper, we analyze different strategies of DL scheduling for LTE CA including centralized, independent and distributed schedulers, we provide the corresponding simulation results considering UE data rate limitations and different traffic models. Also, we compare the performance of a single LTE carrier with LTE CA using the same total bandwidth.

KeywordsLong Term EvolutionCarrier AggregationSchedulingDownlinkBandwidth

S. Parkvall, E. Dahlman, A. Furuskar, A. Kangas, M. Olsson, S. Wanstedt and K. Zangi, “LTE-Advanced - Evolving LTE towards IMT-Advanced,” IEEE 68th Vehicular Technology Conference VTC 2008-Fall, 21-24 September 2008, pp. 1-5. 10.1109/VETECF.2008.313
S. Parkvall, A. Furuskar and E. Dahlman, “Evolution of LTE toward IMT-advanced,” IEEE Communications Magazine, Vol. 49, February 2011, pp. 84-91. doi:10.1109/MCOM.2011.5706315
S. Parkvall, E. Englund, A. Furuskar, E. Dahlman, T. Jönsson and A. Paravati, “LTE Evolution towards IMT- advanced and Commercial Network Performance,” IEEE International Conference on Communication Systems (ICCS), 17-19 November 2010, pp. 151-155. doi:10.1109/ICCS.2010.5686370
R Ratasuk, D. Tolli and A. Ghosh, “Carrier Aggregation in LTE-Advanced,” IEEE 71st Vehicular Technology Conference (VTC 2010-Spring), 16-19 May 2010, pp. 1-5. doi:10.1109/VETECS.2010.5493902
Z. K. Shen; A. Papasakellariou, J. Montojo, D. Gerstenberger and F. L. Xu, “Overview of 3GPP LTE-advanced Carrier Aggregation for 4G Wireless Communications,” IEEE Communications Magazine, Vol. 50, Feruary 2012, pp. 122-130. doi:10.1109/MCOM.2012.6146491
K. I. Pedersen, F. Frederiksen, C. Rosa, H. Nguyen, L. G. U. Garcia and Y. Y. Wang, “Carrier Aggregation for LTE-advanced: Functionality and Performance Aspects,” IEEE Communications Magazine, Vol. 49, 2011, pp. 89-95. doi:10.1109/MCOM.2011.5783991
I. Shayea, M. Ismail and R. Nordin, “Capacity Evaluation of Carrier Aggregation Techniques in LTE-Advanced system,” International Conference on Computer and Communication Engineering (ICCCE), 2012, pp. 99-103. doi:10.1109/ICCCE.2012.6271160
H. Wang, C. Rosa and K. Pedersen, “Performance of Uplink Carrier Aggregation in LTE-Advanced Systems,” IEEE 72nd Vehicular Technology Conference Fall (VTC 2010-Fall), 6-9 September 2010, pp. 1-5. doi:10.1109/VETECF.2010.5594543
Y. Y. Wang, K. I. Pedersen, T. B. Sorensen, P. E. Mogensen, “Utility Maximization in LTE-Advanced Systems with Carrier Aggregation,” IEEE 73rd Vehicular Technology Conference (VTC Spring), 15-18 May 2011, pp. 1-5. doi:10.1109/VETECS.2011.5956494
Y. Y. Wang, K. I. Pedersen, T. B. Sorensen and P. E. Mogensen, “Carrier Load Balancing and Packet Scheduling for Multi-carrier Systems,” IEEE Transactions on Wireless Communications, Vol. 9, May 2010, pp. 1780-1789. doi:10.1109/10.1109/TWC.2010.05.091310
3GPP TS 36.306 v10.9.0 “Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio access capabilities (Release 10),” TSG RAN.

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Downlink Scheduling and Rate Capping for LTE-Advanced Carrier Aggregation

Abstract

References (15)