Dense small cell clustering based on undirected weighted graph for local mobility management

doi:10.1016/S1005-8885(16)60055-9

中国邮电高校学报(英文版) ›› 2016, Vol. 23 ›› Issue (5): 32-39.doi: 10.1016/S1005-8885(16)60055-9

Dense small cell clustering based on undirected weighted graph for local mobility management

李营营,马忠贵,刘立宇,闫文博

北京科技大学

收稿日期:2016-06-02 修回日期:2016-09-28 出版日期:2016-10-30 发布日期:2016-10-26
通讯作者: 马忠贵 E-mail:zhongguima@ustb.edu.cn
基金资助:
the National Natural Science Foundation of China (61572074), the Funding Project for Beijing Excellent Talents Training (2013D009006000002), the Foundation of Beijing Engineering and Technology Center for Convergence Networks and Ubiquitous Services.

Dense small cell clustering based on undirected weighted graph for local mobility management

Li Yingying, Ma Zhonggui, Liu Liyu, Yan Wenbo

Received:2016-06-02 Revised:2016-09-28 Online:2016-10-30 Published:2016-10-26
Contact: Zhong-Gui MA E-mail:zhongguima@ustb.edu.cn
Supported by:
the National Natural Science Foundation of China (61572074), the Funding Project for Beijing Excellent Talents Training (2013D009006000002), the Foundation of Beijing Engineering and Technology Center for Convergence Networks and Ubiquitous Services.

摘要/Abstract

摘要： The concept of dense small cell has been recently emerged as a promising architecture that can signi?cantly improve spectrum efficiency and system capacity. However, it brings frequent handover for user equipment (UE). Furthermore, this will bring a great deal of signaling overhead to the core network. Virtual technology has been received widespread attention for solving this problem. Its essence is to form virtual cells by clustering various terminals properly. The local mobility management proposed recently is based on the virtual technology. Therefore, the formation process of virtual cells is the basis for the research in local mobility management. So clustering scheme for dense small cell network has been studied in this paper, and a maximum benefit merging algorithm based on undirected weighted graph has been proposed. There are X2 interfaces between the cluster head and each of cluster members within the same cluster. The cluster heads manage the handover among cluster members acting as the local anchors. The proposed clustering scheme is useful for local mobility management. The simulation results show that the proposed clustering algorithm can decrease the signaling overhead more than 70% and 20% compared with the non-clustering algorithm and other clustering algorithms respectively.

关键词: mobility management, dense small cell network, handover, clustering, LTE-A

Abstract: The concept of dense small cell has been recently emerged as a promising architecture that can signi?cantly improve spectrum efficiency and system capacity. However, it brings frequent handover for user equipment (UE). Furthermore, this will bring a great deal of signaling overhead to the core network. Virtual technology has been received widespread attention for solving this problem. Its essence is to form virtual cells by clustering various terminals properly. The local mobility management proposed recently is based on the virtual technology. Therefore, the formation process of virtual cells is the basis for the research in local mobility management. So clustering scheme for dense small cell network has been studied in this paper, and a maximum benefit merging algorithm based on undirected weighted graph has been proposed. There are X2 interfaces between the cluster head and each of cluster members within the same cluster. The cluster heads manage the handover among cluster members acting as the local anchors. The proposed clustering scheme is useful for local mobility management. The simulation results show that the proposed clustering algorithm can decrease the signaling overhead more than 70% and 20% compared with the non-clustering algorithm and other clustering algorithms respectively.

Key words: mobility management, dense small cell network, handover, clustering, LTE-A

中图分类号:

TN91

Li Yingying, Ma Zhonggui,Liu Liyu, Yan Wenbo. Dense small cell clustering based on undirected weighted graph for local mobility management[J]. JOURNAL OF CHINA UNIVERSITIES OF POSTS AND TELECOM, 2016, 23(5): 32-39.

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Dense small cell clustering based on undirected weighted graph for local mobility management

Dense small cell clustering based on undirected weighted graph for local mobility management

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