Proceedings ArticleDOI
Overview of UMTS Air-Interface Evolution
Brian K. Classon,Kevin L. Baum,Vijay Nangia,R. Love,Yakun Sun,R. Nory,K. Stewart,Arunabha Ghosh,Rapeepat Ratasuk,Weimin Xiao,Jun Tan +10 more
- pp 1-5
TLDR
A preliminary look at the air interface for Evolved UTRA (E-UTRA) and associated key technologies required to reach its design objectives are provided.Abstract:
With the emergence of packet-based wireless broadband systems such as 802.16e, it is evident that a comprehensive evolution of the universal mobile telecommunications system specifications is required to remain competitive. As a result, work has begun on long term evolution (LTE) of the UMTS terrestrial radio access and radio access network aimed for commercial deployment in 2010. Goals for the evolved system include support for improved system capacity and coverage, high peak data rates, low latency, reduced operating costs, multi-antenna support, flexible bandwidth operations and seamless integration with existing systems. To reach these goals, a new design for the air interface is envisioned. This paper provides a preliminary look at the air interface for Evolved UTRA (E-UTRA) and associated key technologies required to reach its design objectives. Initial E-UTRA system performance results show a 2 to 3x improvement over a reference Rel-6 UMTS system configuration [1, 2] for both uplink and downlink.read more
Citations
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Journal ArticleDOI
LTE-advanced: next-generation wireless broadband technology [Invited Paper]
TL;DR: An overview of the techniques being considered for LTE Release 10 (aka LTEAdvanced) is discussed, which includes bandwidth extension via carrier aggregation to support deployment bandwidths up to 100 MHz, downlink spatial multiplexing including single-cell multi-user multiple-input multiple-output transmission and coordinated multi point transmission, and heterogeneous networks with emphasis on Type 1 and Type 2 relays.
Proceedings ArticleDOI
Carrier Aggregation in LTE-Advanced
TL;DR: This paper provides an overview of carrier aggregation and discusses major technical issues including aggregation structure, scenarios, implementation, control signalling design and coexistence with legacy LTE systems.
Patent
Method and apparatus for transmitting control information in a wireless communication system
TL;DR: In this article, a method for transmitting a signal via physical uplink control channel (PUCCH) in a wireless communication system and an apparatus for performing the method are provided.
Proceedings ArticleDOI
Uplink Power Control, Interference Coordination and Resource Allocation for 3GPP E-UTRA
TL;DR: Simulation results show that interference mitigation is implemented through slow fractional power control and interference coordination through UE alignment and FDM resource allocation significantly improve uplink sector and cell edge user throughput performance.
Patent
Method and apparatus for providing downlink reference signal transmission power information in a wireless communication system that supports multiple antennas
TL;DR: In this article, a method for providing demodulation reference signal transmission power information in a wireless communication system that supports multiple antennas is presented, where the main synchronous signal and the reference signal are mapped onto a predetermined OFDM symbol of a downlink pilot time slot subframe.
References
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Proceedings ArticleDOI
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TL;DR: System throughput estimates are provided for frequency non-selective coding and frequency selective coding for single antenna, Alamouti, and selective closed-loop MIMO configurations.
Proceedings ArticleDOI
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