Time domain bi-level downlink power control for cross-tier interference mitigation in HetNet

Haining Wang, Zhi Ding, Michal Cierny, Risto Wichman

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

4 Citations (Scopus)


We develop and analyze a time-domain bi-level power control scheme using Almost Blank Subframe (ABS) for downlink cross-tier interference mitigation. Even for only one femto cell and macro cell, the optimization problem given rate constraint is nonconvex. We prove that by relaxing the integer requirement for subframe division, the optimal strategy is using either power control or ABS individually, and a joint scheme is not needed in the optimal solution. Imposing the integer subframe number requirement, this conclusion is no longer true. However, we show that the optimal solution also assumes simple structure by choosing from one of three feasible solutions. Simulation results show that the joint power control and ABS scheme outperforms traditional single-level power control scheme for downlink cross-tier interference mitigation with low computational complexity.

Original languageEnglish
Title of host publication2013 IEEE International Conference on Communications, ICC 2013
Number of pages5
ISBN (Print)9781467331227
Publication statusPublished - 2013
MoE publication typeA4 Article in a conference publication
EventIEEE International Conference on Communications - Budapest, Hungary
Duration: 9 Jun 201313 Jun 2013

Publication series

NameIEEE International Conference on Communications
ISSN (Print)1550-3607


ConferenceIEEE International Conference on Communications
Abbreviated titleICC


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