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Báo cáo hóa học: " Research Article On the Way towards Fourth-Generation Mobile: 3GPP LTE and LTE-Advanced"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article On the Way towards Fourth-Generation Mobile: 3GPP LTE and LTE-Advanced | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 354089 10 pages doi 10.1155 2009 354089 Research Article On the Way towards Fourth-Generation Mobile 3GPP LTE and LTE-Advanced David Martin-Sacristán Jose F. Monserrat Jorge Cabrejas-Penuelas Daniel Calabuig Salvador Garrigas and Narcis Cardona iTEAM Research Institute Universidad Politecnica de Valencia Camino de Vera S N 46022 Valencia Spain Correspondence should be addressed to Jose F. Monserrat jomondel@iteam.upv.es Received 31 January 2009 Accepted 18 June 2009 Recommended by Claude Oestges Long-Term Evolution LTE is the new standard recently specified by the 3GPP on the way towards fourth-generation mobile. This paper presents the main technical features of this standard as well as its performance in terms of peak bit rate and average cell throughput among others. LTE entails a big technological improvement as compared with the previous 3G standard. However this paper also demonstrates that LTE performance does not fulfil the technical requirements established by ITU-R to classify one radio access technology as a member of the IMT-Advanced family of standards. Thus this paper describes the procedure followed by the 3GPP to address these challenging requirements. Through the design and optimization of new radio access techniques and a further evolution of the system the 3GPP is laying down the foundations of the future LTE-Advanced standard the 3GPP candidate for 4G. This paper offers a brief insight into these technological trends. Copyright 2009 David Martin-Sacristan et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Introduction In the last years technology evolution in mobile communications is mainly motivated by three relevant agents 1 the market globalization and .