期刊名称：International Journal of Computer Networks & Communications
印刷版ISSN：0975-2293
电子版ISSN：0974-9322
出版年度：2016
卷号：8
期号：1
页码：87
DOI：10.5121/ijcnc.2016.8107
出版社：Academy & Industry Research Collaboration Center (AIRCC)
摘要：WiFi offloading is becoming one of the key enablers to help the network operators dealing with theexponentially growing demand of mobile data. The idea of using WiFi to offload data traffic from cellularnetwork has proposed for many years. However, the interoperability issue between the two networks needsto be enhanced so that WiFi can efficiently supplement for the cellular network in case of congestion oroutage. In this paper, we propose a novel network roaming and selection scheme based on 3GPP TS24.312 and IEEE 802.11k, u standards to enhance cellular and WiFi interworking. The proposed scheme isaimed at enhancing the network roaming and selection so that WiFi network can serve as a supplement andbackup access network for the cellular not only for congestion control but also in case of unexpectednetwork failure event. We also model and evaluate the proposed scheme in a typical HetNet withinterworking WiFi access points and cellular base stations. The simulation result shows that our proposedscheme quickly detects unexpected network failure event and assists active UEs to perform handoff topreferable alternative point of access. As a result, service disruption is substantially reduced and quality ofexperience (downlink/uplink’s throughput) is improved. Therefore, our proposed scheme can be used for amore reliable HetNet in terms of congestion control and disruption tolerance.
