期刊名称：International Journal of Antennas and Propagation
印刷版ISSN：1687-5869
电子版ISSN：1687-5877
出版年度：2014
卷号：2014
DOI：10.1155/2014/624858
出版社：Hindawi Publishing Corporation
摘要：Heterogeneous networks (HetNets) can increase network capacity
through complementing the macro-base-station with low-power nodes, in response to the ongoing exponential growth in data
traffic demand. While, unprecedented challenges exist in the
planning, optimization, and maintenance in HetNets, especially
activities such as cell outage detection and mitigation are
labor-intensive and costly. One potential solution to address these
issues is to introduce the extensively attracted self-organizing
network (SON). This paper is mainly devoted to cell outage detection
and compensation methods in two-tier HetNets where macrocell and
picocells are coexisted. A -nearest neighbor (KNN) classification
algorithm is employed to detect the cell outage automatically.
Consider the breakdown picocell can reload its degraded service to
the overlapped macrocell via vertical handover; only the breakdown
macrocell executes the performance compensation. Power adjustment on
each resource block is carried out via Lagrange optimizing algorithm
to compensate the breakdown cell. Through intensive numerical
experiments, with the help of our proposal, the outage cells can be
successfully detected and performance gain for the outage macrocell
can reach 91.4% with .
