Load-Aware Offloading Strategy in Two-Tier Heterogeneous Network

作     者：Jianyuan Feng Zhiyong Feng Zhiqing Wei 

作者机构：Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications 

出 版 物：《China Communications》 (中国通信（英文版）)

年 卷 期：2016年第13卷第8期

页      面：148-158页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：supported by the National High-Tech R&D Program (863 Program) under grant No. 2015AA01A705 Beijing Municipal Science and Technology Commission research fund project under grant No. D151100000115002 China Scholarship Council under grant No. 201406470038 BUPT youth scientific research innovation program under grant No. 500401238 

主　　题：heterogeneous networks offloading strategies load-aware Poisson point process Markov chain throughput maximization CSMA 

摘      要：Although small cell offloading technology can alleviate the congestion in macrocell, aggressively offloading data traffic from macrocell to small cell can also degrade the performance of small cell due to the heavy load. Because of collision and backoff, the degradation is significant especially in network with contention-based channel access, and finally decreases throughput of the whole network. To find an optimal fraction of traffic to be offloaded in heterogeneous network, we combine Markov chain with the Poisson point process model to analyze contention-based throughput in irregularly deployment networks. Then we derive the close-form solution of the throughput and find that it is a function of the transmit power and density of base *** on this, we propose the load-aware offloading strategies via power control and base station density adjustment. The numerical results verify our analysis and show a great performance gain compared with non-load-aware offloading.