The Experts below are selected from a list of 5601 Experts worldwide ranked by ideXlab platform
R Love - One of the best experts on this subject based on the ideXlab platform.
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Carrier Aggregation framework in 3GPP LTE-advanced [WiMAX/LTE Update]
IEEE Communications Magazine, 2010Co-Authors: Mikio Iwamura, Kamran Etemad, Mo-han Fong, R Nory, R LoveAbstract:Carrier Aggregation is one of the most distinct features of 4G systems including LTEAdvanced, which is being standardized in 3GPP as part of LTE Release 10. This feature allows scalable expansion of effective bandwidth delivered to a user terminal through concurrent utilization of radio resources across multiple Carriers. These Carriers may be of different bandwidths, and may be in the same or different bands to provide maximum flexibility in utilizing the scarce radio spectrum available to operators. Support for this feature requires enhancement to the LTE Release 8/9 PHY, MAC, and RRC layers while ensuring that LTE Release 10 maintains backward compatibility to LTE Release 8/9. This article provides an overview of Carrier Aggregation use cases and the framework, and their impact on LTE Release 8/9 protocol layers.
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Carrier Aggregation framework in 3gpp lte advanced wimax lte update
IEEE Communications Magazine, 2010Co-Authors: Mikio Iwamura, Kamran Etemad, Mo-han Fong, R Nory, R LoveAbstract:Carrier Aggregation is one of the most distinct features of 4G systems including LTEAdvanced, which is being standardized in 3GPP as part of LTE Release 10. This feature allows scalable expansion of effective bandwidth delivered to a user terminal through concurrent utilization of radio resources across multiple Carriers. These Carriers may be of different bandwidths, and may be in the same or different bands to provide maximum flexibility in utilizing the scarce radio spectrum available to operators. Support for this feature requires enhancement to the LTE Release 8/9 PHY, MAC, and RRC layers while ensuring that LTE Release 10 maintains backward compatibility to LTE Release 8/9. This article provides an overview of Carrier Aggregation use cases and the framework, and their impact on LTE Release 8/9 protocol layers.
Mikio Iwamura - One of the best experts on this subject based on the ideXlab platform.
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Carrier Aggregation framework in 3GPP LTE-advanced [WiMAX/LTE Update]
IEEE Communications Magazine, 2010Co-Authors: Mikio Iwamura, Kamran Etemad, Mo-han Fong, R Nory, R LoveAbstract:Carrier Aggregation is one of the most distinct features of 4G systems including LTEAdvanced, which is being standardized in 3GPP as part of LTE Release 10. This feature allows scalable expansion of effective bandwidth delivered to a user terminal through concurrent utilization of radio resources across multiple Carriers. These Carriers may be of different bandwidths, and may be in the same or different bands to provide maximum flexibility in utilizing the scarce radio spectrum available to operators. Support for this feature requires enhancement to the LTE Release 8/9 PHY, MAC, and RRC layers while ensuring that LTE Release 10 maintains backward compatibility to LTE Release 8/9. This article provides an overview of Carrier Aggregation use cases and the framework, and their impact on LTE Release 8/9 protocol layers.
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Carrier Aggregation framework in 3gpp lte advanced wimax lte update
IEEE Communications Magazine, 2010Co-Authors: Mikio Iwamura, Kamran Etemad, Mo-han Fong, R Nory, R LoveAbstract:Carrier Aggregation is one of the most distinct features of 4G systems including LTEAdvanced, which is being standardized in 3GPP as part of LTE Release 10. This feature allows scalable expansion of effective bandwidth delivered to a user terminal through concurrent utilization of radio resources across multiple Carriers. These Carriers may be of different bandwidths, and may be in the same or different bands to provide maximum flexibility in utilizing the scarce radio spectrum available to operators. Support for this feature requires enhancement to the LTE Release 8/9 PHY, MAC, and RRC layers while ensuring that LTE Release 10 maintains backward compatibility to LTE Release 8/9. This article provides an overview of Carrier Aggregation use cases and the framework, and their impact on LTE Release 8/9 protocol layers.
Hui Zhao - One of the best experts on this subject based on the ideXlab platform.
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design and performance analysis of an energy efficient uplink Carrier Aggregation scheme
IEEE Journal on Selected Areas in Communications, 2014Co-Authors: Kan Zheng, Wei Xiang, Hui ZhaoAbstract:Energy efficiency is of vital importance for telecommunications equipment in future networks, especially battery-constrained mobile devices. In the long term evolution-Advanced (LTE-Advanced) network, the Carrier Aggregation (CA) technique is employed to allow user equipment (UE) to use multiple Carriers for high data rate communications. However, multi-Carrier transmission entails increased power consumption at user devices in uplink networks. In this paper, we propose a new dynamic Carrier Aggregation (DCA) scheduling scheme to improve the energy efficiency of uplink communications. Two scheduling methods, i.e., serving the longest queue (SLQ) and round-robin with priority (RRP), are designed to reduce transmit power while maximizing the utilization of wireless resources. The proposed scheme is analyzed in terms of both the data rate and energy conservation. We build an ideally balanced system (IBS) to investigate the performance upper bound of the DCA scheme, and derive closed-form expressions. Simulation results demonstrate that the proposed scheme can not only enhance the energy efficiency but also perform closely to the optimal IBS.
Rapeepat Ratasuk - One of the best experts on this subject based on the ideXlab platform.
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VTC Spring - Carrier Aggregation in LTE-Advanced
2010 IEEE 71st Vehicular Technology Conference, 2010Co-Authors: Rapeepat Ratasuk, Dominic Tolli, Amitava GhoshAbstract:UMTS LTE system can support flexible bandwidth configuration up to 20 MHz. Currently, system enhancements are being considered to provide substantial improvements to LTE and allow it to meet or exceed IMT-Advanced requirements. One key enhancement feature is bandwidth extension via Carrier Aggregation to support deployment bandwidth up to 100 MHz. This will allow peak target data rates in excess of 1 Gbps in the downlink and 500 Mbps in the uplink to be achieved. Carrier Aggregation is attractive because it allows operators to deploy a system with larger bandwidth by aggregating several smaller contiguous or non-contiguous Carriers while providing backward compatibility to legacy users. For instance, an 80MHz system can be constructed using contiguous or non-contiguous 4×20MHz component Carriers. Legacy users can then access the system using one of the component Carriers. 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.
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Carrier Aggregation in LTE-advanced
IEEE Vehicular Technology Conference, 2010Co-Authors: Rapeepat Ratasuk, Dominic TolliAbstract:UMTS LTE system can support flexible bandwidth configuration up to 20 MHz. Currently, system enhancements are being considered to provide substantial improvements to LTE and allow it to meet or exceed IMT-Advanced requirements. One key enhancement feature is bandwidth extension via Carrier Aggregation to support deployment bandwidth up to 100 MHz. This will allow peak target data rates in excess of 1 Gbps in the downlink and 500 Mbps in the uplink to be achieved. Carrier Aggregation is attractive because it allows operators to deploy a system with larger bandwidth by aggregating several smaller contiguous or non-contiguous Carriers while providing backward compatibility to legacy users. For instance, an 80 MHz system can be constructed using contiguous or non-contiguous 4 × 20 MHz component Carriers. Legacy users can then access the system using one of the component Carriers. 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.
Dominic Tolli - One of the best experts on this subject based on the ideXlab platform.
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VTC Spring - Carrier Aggregation in LTE-Advanced
2010 IEEE 71st Vehicular Technology Conference, 2010Co-Authors: Rapeepat Ratasuk, Dominic Tolli, Amitava GhoshAbstract:UMTS LTE system can support flexible bandwidth configuration up to 20 MHz. Currently, system enhancements are being considered to provide substantial improvements to LTE and allow it to meet or exceed IMT-Advanced requirements. One key enhancement feature is bandwidth extension via Carrier Aggregation to support deployment bandwidth up to 100 MHz. This will allow peak target data rates in excess of 1 Gbps in the downlink and 500 Mbps in the uplink to be achieved. Carrier Aggregation is attractive because it allows operators to deploy a system with larger bandwidth by aggregating several smaller contiguous or non-contiguous Carriers while providing backward compatibility to legacy users. For instance, an 80MHz system can be constructed using contiguous or non-contiguous 4×20MHz component Carriers. Legacy users can then access the system using one of the component Carriers. 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.
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Carrier Aggregation in LTE-advanced
IEEE Vehicular Technology Conference, 2010Co-Authors: Rapeepat Ratasuk, Dominic TolliAbstract:UMTS LTE system can support flexible bandwidth configuration up to 20 MHz. Currently, system enhancements are being considered to provide substantial improvements to LTE and allow it to meet or exceed IMT-Advanced requirements. One key enhancement feature is bandwidth extension via Carrier Aggregation to support deployment bandwidth up to 100 MHz. This will allow peak target data rates in excess of 1 Gbps in the downlink and 500 Mbps in the uplink to be achieved. Carrier Aggregation is attractive because it allows operators to deploy a system with larger bandwidth by aggregating several smaller contiguous or non-contiguous Carriers while providing backward compatibility to legacy users. For instance, an 80 MHz system can be constructed using contiguous or non-contiguous 4 × 20 MHz component Carriers. Legacy users can then access the system using one of the component Carriers. 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.