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A utility‐based load‐balancing scheme with guarantee of users' rate for LTE self‐organization networks
Author(s) -
Yang Ying,
Dong WenXiang,
Chen XiaoHui,
Wang Weidong
Publication year - 2013
Publication title -
international journal of network management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.373
H-Index - 28
eISSN - 1099-1190
pISSN - 1055-7148
DOI - 10.1002/nem.1824
Subject(s) - handover , computer science , base station , scheme (mathematics) , load balancing (electrical power) , convexity , variance (accounting) , term (time) , mathematical optimization , computer network , real time computing , grid , mathematical analysis , business , geometry , mathematics , physics , quantum mechanics , accounting , financial economics , economics
SUMMARY Mobility load balance is becoming increasingly crucial in the design of self‐organization networks for LTE (long‐term evolution), especially under dynamic scenarios. In this paper, we study the problem of load balance with guarantee of users' rate and formulate a general optimization model, where the weighted sum of the first‐order and second‐order statistics of load distribution (load variance and total load level) are considered directly. We prove the convexity of the model and derive the optimal user‐station association scheme in different weights. Based on analysis of the optimization model, a dynamic admission and handover scheme is proposed. Mobile users with rate requirement select a base station based on the load utility in a distributed way and handover to the selected station (if handover is triggered). Furthermore, a simulation platform with seven cells is developed to evaluate the dynamic admission and handover scheme. It is demonstrated that our proposed scheme outperforms the conventional counterpart. Copyright © 2013 John Wiley & Sons, Ltd.