A survey of radio resource management for spectrum aggregation in LTE-advanced

Haeyoung Lee, Seiamak Vahid, Klaus Moessner

Research output: Contribution to journalArticlepeer-review

138 Citations (Scopus)


In order to satisfy the requirements of future IMT-Advanced mobile systems, the concept of spectrum aggregation is introduced by 3GPP in its new LTE-Advanced (LTE Rel. 10) standards. While spectrum aggregation allows aggregation of carrier components (CCs) dispersed within and across different bands (intra/inter-band) as well as combination of CCs having different bandwidths, spectrum aggregation is expected to provide a powerful boost to the user throughput in LTE-Advanced (LTE-A). However, introduction of spectrum aggregation or carrier aggregation (CA) as referred to in LTE Rel. 10, has required some changes from the baseline LTE Rel. 8 although each CC in LTE-A remains backward compatible with LTE Rel. 8. This article provides a review of spectrum aggregation techniques, followed by requirements on radio resource management (RRM) functionality in support of CA. On-going research on the different RRM aspects and algorithms to support CA in LTE-Advanced are surveyed. Technical challenges for future research on aggregation in LTE-Advanced systems are also outlined.
Original languageEnglish
Article number6657499
Pages (from-to)745-760
Number of pages16
JournalIEEE Communications Surveys & Tutorials
Issue number2
Publication statusPublished - 2014


  • Carrier aggregation
  • Radio Resource Management
  • Scheduling
  • Spectrum Aggregation


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