Open AccessLoad‐aware user association with quality of service support in heterogeneous cellular networks
Author(s) -
Zhou Tianqing,
Huang Yongming,
Fan Lixing,
Yang Luxi
Publication year - 2015
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2014.0731
Subject(s) - computer science , load balancing (electrical power) , mathematical optimization , convergence (economics) , quality of service , dual (grammatical number) , distributed computing , set (abstract data type) , association (psychology) , computer network , mathematics , philosophy , epistemology , art , geometry , literature , grid , economics , programming language , economic growth
In this study, the authors propose a user association scheme with quality of service support for load balancing in heterogeneous cellular networks (HCNs), which jointly considers user's achievable rate and load level of each BS instead of only utilising the former. To reveal how HCNs should self‐organise, the authors formulate it as a network‐wide weighted utility maximisation problem. Note that the formulated problem is a non‐linear mixed‐integer one, and its optimal solutions may be very difficult to be found when it is large‐scale. To solve the proposed problem, the authors design a low‐complexity distributed algorithm via dual decomposition. Numerical results show that, compared with the range expansion association (REA) and best power association (BPA), the strategy has a higher load balancing level (LBL) and a lower call blocking probability (CBP). Meanwhile, the proposed algorithm occupies a very fast convergence rate when its parameters are set properly.