Performance Analysis of Downlink Inter-band Carrier Aggregation in LTE-Advanced

Hua Wang, Claudio Rosa, Klaus Pedersen

Research output: Contribution to journalConference article in JournalResearchpeer-review

45 Citations (Scopus)
2419 Downloads (Pure)

Abstract

Carrier aggregation (CA) is one of the most distinct features for LTE-Advanced systems, which can support a much wider transmission bandwidth up to 100 MHz by aggregating two or more individual component carriers (CCs) belonging to the same (intra-band) or different (inter-band) frequency bands. With CA, it is possible to schedule a user equipment (UE) on multiple CCs simultaneously. From radio resource management (RRM) perspective, CC selection plays an important role in optimizing the system performance, especially in the case of inter-band CA where the radio propagation characteristics of each CC can be different. In this paper, we investigate the downlink resource allocation for inter-band CA, i.e., how to assign carrier(s) to different UEs. A simple yet effective G-factor based carrier selection algorithm, which takes both traffic load and radio channel characteristics into considerations, is proposed with the objective to guarantee good coverage for Rel'8 UEs and robustness for Rel'10 UEs. Simulation results show that our proposed G-factor based carrier selection algorithm can achieve much better coverage performance compared to the least-load carrier selection in scenarios with relatively high inter-site distance and relatively high frequency separation between carriers, at the expense of some marginal average user throughput loss.
Original languageEnglish
JournalI E E E V T S Vehicular Technology Conference. Proceedings
ISSN1550-2252
DOIs
Publication statusPublished - 2011
EventVTC Fall 2011: VTC2011-Fall - San Francisco, United States
Duration: 5 Sep 20118 Sep 2011
Conference number: 74

Conference

ConferenceVTC Fall 2011
Number74
CountryUnited States
CitySan Francisco
Period05/09/201108/09/2011

Fingerprint

LTE-advanced
Performance Analysis
Aggregation
Agglomeration
Coverage
Radio transmission
Radio Resource Management
Telecommunication traffic
Frequency bands
Resource allocation
Resource Allocation
Throughput
Assign
System Performance
Bandwidth
Schedule
Traffic
Propagation
Robustness
Distinct

Cite this

@inproceedings{975939f257bd4cb182cc7b700e03aaf1,
title = "Performance Analysis of Downlink Inter-band Carrier Aggregation in LTE-Advanced",
abstract = "Carrier aggregation (CA) is one of the most distinct features for LTE-Advanced systems, which can support a much wider transmission bandwidth up to 100 MHz by aggregating two or more individual component carriers (CCs) belonging to the same (intra-band) or different (inter-band) frequency bands. With CA, it is possible to schedule a user equipment (UE) on multiple CCs simultaneously. From radio resource management (RRM) perspective, CC selection plays an important role in optimizing the system performance, especially in the case of inter-band CA where the radio propagation characteristics of each CC can be different. In this paper, we investigate the downlink resource allocation for inter-band CA, i.e., how to assign carrier(s) to different UEs. A simple yet effective G-factor based carrier selection algorithm, which takes both traffic load and radio channel characteristics into considerations, is proposed with the objective to guarantee good coverage for Rel'8 UEs and robustness for Rel'10 UEs. Simulation results show that our proposed G-factor based carrier selection algorithm can achieve much better coverage performance compared to the least-load carrier selection in scenarios with relatively high inter-site distance and relatively high frequency separation between carriers, at the expense of some marginal average user throughput loss.",
author = "Hua Wang and Claudio Rosa and Klaus Pedersen",
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language = "English",
journal = "I E E E V T S Vehicular Technology Conference. Proceedings",
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Performance Analysis of Downlink Inter-band Carrier Aggregation in LTE-Advanced. / Wang, Hua; Rosa, Claudio; Pedersen, Klaus.

In: I E E E V T S Vehicular Technology Conference. Proceedings, 2011.

Research output: Contribution to journalConference article in JournalResearchpeer-review

TY - GEN

T1 - Performance Analysis of Downlink Inter-band Carrier Aggregation in LTE-Advanced

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AU - Rosa, Claudio

AU - Pedersen, Klaus

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AB - Carrier aggregation (CA) is one of the most distinct features for LTE-Advanced systems, which can support a much wider transmission bandwidth up to 100 MHz by aggregating two or more individual component carriers (CCs) belonging to the same (intra-band) or different (inter-band) frequency bands. With CA, it is possible to schedule a user equipment (UE) on multiple CCs simultaneously. From radio resource management (RRM) perspective, CC selection plays an important role in optimizing the system performance, especially in the case of inter-band CA where the radio propagation characteristics of each CC can be different. In this paper, we investigate the downlink resource allocation for inter-band CA, i.e., how to assign carrier(s) to different UEs. A simple yet effective G-factor based carrier selection algorithm, which takes both traffic load and radio channel characteristics into considerations, is proposed with the objective to guarantee good coverage for Rel'8 UEs and robustness for Rel'10 UEs. Simulation results show that our proposed G-factor based carrier selection algorithm can achieve much better coverage performance compared to the least-load carrier selection in scenarios with relatively high inter-site distance and relatively high frequency separation between carriers, at the expense of some marginal average user throughput loss.

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