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Mobility enhancements for LTE-Advanced Multilayer Networks with Inter-Site Carrier Aggregation

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Authors:
  • Pedersen, Klaus I. ;
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    The Technical Faculty of IT and Design, Aalborg University
  • Michaelsen, Per Henrik ;
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    The Faculty of Engineering and Science (ENG), Aalborg University
  • Rosa, Claudio ;
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    Department of Electronic Systems, The Technical Faculty of IT and Design, Aalborg University
  • Barbera, Simone
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    Department of Electronic Systems, The Technical Faculty of IT and Design, Aalborg University
DOI:
10.1109/MCOM.2013.6515048
Abstract:
In this article we first summarize some of the most recent HetNet mobility studies for LTE-Advanced, and use these to highlight the challenges that should be further addressed in theresearch community. A state-of-the-art HetNet scenario with macros and small cells deployed on different carriers, while using inter-site carrier aggregation, is hereafter studied. Hybrid Het- Net mobility solutions for such cases are derived, where macrocell mobility is network controlled, while small-cell mobility is made UEautonomous. The proposed scheme is characterized by having the UE devices autonomously decide small cell addition, removal, and change without any explicit signaling of Measurement events to the network or any signaling of hand-over commands from the network. Hence, the proposed solution effectively offloads the network from having to perform frequent small cell handoff decisions, and reduces the signaling overhead compared to known network controlled mobility solutions. Results from extensive dynamic system-level simulations are presented to demonstrate the advantages of the proposed technique, showing significant savings in signaling overhead.
Type:
Journal article
Language:
English
Published in:
I E E E Communications Magazine, 2013, Vol 51, Issue 5, p. 64-71
Main Research Area:
Science/technology
Publication Status:
Published
Review type:
Peer Review
Submission year:
2013
Scientific Level:
Scientific
ID:
241510388

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