Dual Connectivity in LTE HetNets with Split Control- and User-Plane

Anna Zakrzewska, David López-Pérez, Stepan Kucera, Holger Claussen

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


    Recently, a new network architecture with split control-plane and user-plane has been proposed and gained a lot of momentum in the standardisation of Long Term Evolution (LTE) Release 12. In this new network architecture, the controlplane, which transmits system information and handles user connectivity, and the user-plane, which manages user data, are split and no longer transmitted necessarily by the same network node. This dual connectivity confers a large flexibility to the system, and allows for a more energy efficient operation and enhanced mobility management. In this paper, we present a detailed description of our dual connectivity framework based on the latest LTE-Advanced enhancements, in which macrocellassisted (MA) small cells use different channel state informationreference signals (CSI-RS) to differentiate among each other and allow User Equipment (UE) to take adequate measurements for cell (re)selection. Taking into account the limited number of available CSI-RSs, we study the assignment problem of CSI-RSs to MA small cells, analyse CSI-RS collision and confusion issues and present simulation results to demonstrate the flexibility of the proposed network architecture.
    Original languageEnglish
    Title of host publicationGlobecom 2013 Workshop - Broadband Wireless Access
    Publication date2013
    ISBN (Print)978-1-4799-2851-4
    Publication statusPublished - 2013
    Event9th IEEE Broadband wireless access workshop (BWA 2013) - Atlanta, Georgia, United States
    Duration: 9 Dec 2013 → …


    Conference9th IEEE Broadband wireless access workshop (BWA 2013)
    Country/TerritoryUnited States
    CityAtlanta, Georgia
    Period09/12/2013 → …
    Internet address


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