Open AccessFuzzy layered physical cell identities assignment in heterogeneous and small cell networks
Author(s) -
Ning Lei,
Wang Zhenyong,
Guo Qing,
Zhang Haijun
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2016.0048
Subject(s) - handover , computer science , fuzzy logic , computer network , cluster analysis , conventional pci , base station , reuse , channel allocation schemes , distributed computing , mathematical optimization , mathematics , engineering , wireless , artificial intelligence , telecommunications , psychology , psychiatry , myocardial infarction , waste management
Massive irregular deployments of small cells require corresponding physical cell identities (PCIs) in heterogeneous cellular networks. The number of PCIs is restricted by the synchronisation sequence result in PCI reuse at an appropriate distance among base stations. Some methods of PCI assignment are given either globally optimal or completely preferential. Accordingly, the former cannot guarantee handover performance, and the latter may lead to low efficiency of allocations. A layered allocation algorithm based on fuzzy clustering is proposed. Simulation results show that it can improve the efficiency of the PCI assignment, while maintaining handover performance.