Title:
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Interference coordination method for CSI improvement in LTE uplink with carrier aggregation
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Author:
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Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. WiComTec - Grup de recerca en Tecnologies i Comunicacions Sense Fils |
Abstract:
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Abstract:
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Carrier Aggregation is an important feature in
Long Term Evolution Advanced (LTE-A). It allows operators
to provide larger operational bandwidths without the need of
having a contiguous, large piece of spectrum. However, an
increased bandwidth also needs a larger channel sounding to
obtain channel state information (CSI), required for frequency
domain scheduling and link adaptation. This constitutes a serious
challenge for the uplink since wideband sounding reference
signals cannot be transmitted by cell edge (power limited) users
and hopped sounding requires a long time to sweep the entire
transmission band, thus leading to outdated and less reliable
CSI. Also, average interference and its variation in time can
seriously jeopardize the CSI at the eNodeB. In this paper, we
present an integration of inter cell interference coordination with
CSI reporting by reducing the interference variability through
controlled allocations. Results show that the entire CSI accuracy
can be improved and so does the overall cell performance. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Comunicacions mòbils -Long-Term Evolution (Telecommunications) -Long-term evolution (Telecomunicacions) |
Rights:
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Document type:
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Article - Submitted version Conference Object |
Published by:
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Institute of Electrical and Electronics Engineers (IEEE)
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