Analysis on Cache-Enabled Wireless Heterogeneous Networks

被引:263
作者
Yang, Chenchen [1 ]
Yao, Yao [2 ]
Chen, Zhiyong [1 ]
Xia, Bin [1 ]
机构
[1] Shanghai Jiao Tong Univ, Dept Elect Engn, IWCT, Shanghai 200240, Peoples R China
[2] Huawei Technol Co Ltd, Shanghai 201206, Peoples R China
基金
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词
Caching; HetNets; content popularity; Poisson point processes; Markov process; pushing; MULTI-TIER; DELIVERY; ASSOCIATION;
D O I
10.1109/TWC.2015.2468220
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Caching popular multimedia content is a promising way to unleash the ultimate potential of wireless networks. In this paper, we propose and analyze cache-based content delivery in a three-tier heterogeneous network (HetNet), where base stations (BSs), relays, and device-to-device (D2D) pairs are included. We advocate proactively caching popular content in the relays and parts of the users with caching ability when the network is off-peak. The cached content can be reused for frequent access to offload the cellular network traffic. The node locations are first modeled as mutually independent Poisson point processes (PPPs) and the corresponding content access protocol is developed. The average ergodic rate and outage probability in the downlink are then analyzed theoretically. We further derive the throughput and the delay based on the multiclass processor-sharing queue model and the continuous-time Markov process. According to the critical condition of the steady state in the HetNet, the maximum traffic load and the global throughput gain are investigated. Moreover, impacts of some key network characteristics, e.g., the heterogeneity of multimedia contents, node densities, and the limited caching capacities, on the system performance are elaborated on to provide valuable insight.
引用
收藏
页码:131 / 145
页数:15
相关论文
共 33 条
[1]  
Ahlehagh H., 2012, 2012 IEEE Wireless Communications and Networking Conference (WCNC), P2276, DOI 10.1109/WCNC.2012.6214173
[2]  
Altieri A., 2015, IEEE T WIRELESS COMM
[3]   Seven Ways that HetNets Are a Cellular Paradigm Shift [J].
Andrews, Jeffrey G. .
IEEE COMMUNICATIONS MAGAZINE, 2013, 51 (03) :136-144
[4]   A Tractable Approach to Coverage and Rate in Cellular Networks [J].
Andrews, Jeffrey G. ;
Baccelli, Francois ;
Ganti, Radha Krishna .
IEEE TRANSACTIONS ON COMMUNICATIONS, 2011, 59 (11) :3122-3134
[5]  
[Anonymous], P IEEE INT C COMM IC
[6]  
Bao YN, 2012, ASIA-PAC CONF COMMUN, P566, DOI 10.1109/APCC.2012.6388258
[7]   Cache-enabled small cell networks: modeling and tradeoffs [J].
Bastug, Ejder ;
Bennis, Mehdi ;
Kountouris, Marios ;
Debbah, Merouane .
EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING, 2015,
[8]   Living on the Edge: The Role of Proactive Caching in 5G Wireless Networks [J].
Bastug, Ejder ;
Bennis, Mehdi ;
Debbah, Merouane .
IEEE COMMUNICATIONS MAGAZINE, 2014, 52 (08) :82-89
[9]  
Cha M, 2007, IMC'07: PROCEEDINGS OF THE 2007 ACM SIGCOMM INTERNET MEASUREMENT CONFERENCE, P1
[10]  
Cisco, 2013, White Paper