Downlink-to-uplink interference cancellation in cloud radio access networks

Wei Ting Lin, Chia-Han Lee, Hsuan Jung Su

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

Dynamically choosing the time-division duplex (TDD) configuration in Long-Term Evolution (LTE) results in intercell interference. Among various interference types, the downlink-to-uplink interference is the strongest due to the much larger downlink (DL) transmission power from a base station than the uplink (UL) transmission power from a user equipment (UE). Although coordinating the neighboring base stations to operate in the same UL/DL configuration is a way to mitigate the interference, the flexibility of TDD is sacrificed. In this paper, we discuss an interference cancellation method exploiting the cloud radio access network (C-RAN) architecture. The downlink- to-uplink interference is cancelled by utilizing the knowledge of the downlink signal available at the cloud server. Simulation results show the effectiveness of this method, which maintains the flexibility of dynamically choosing the UL/DL configuration according to the traffic demand in the TDD system.

Original languageEnglish
Article number7022892
JournalIEEE Vehicular Technology Conference
Volume2015-January
Issue numberJanuary
DOIs
StatePublished - 1 Jan 2014
Event2014 79th IEEE Vehicular Technology Conference, VTC 2014-Spring - Seoul, Korea, Republic of
Duration: 18 May 201421 May 2014

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