NDLI: Novel Opportunistic Interference Mitigation Schemes for Heterogeneous Networks

Content Provider	IEEE Xplore Digital Library
Author	Deyue Zhang Hui Gao Yuan Ren Tiejun Lv Chau Yuen
Copyright Year	2015
Description	Author affiliation: Singapore Univ. of Technol. & Design, Singapore, Singapore (Chau Yuen) \|\| Key Lab. of Trustworthy Distrib. Comput. & Service, Beijing Univ. of Posts & Telecommun., Beijing, China (Deyue Zhang; Hui Gao; Yuan Ren; Tiejun Lv)
Abstract	This paper considers to mitigate the uplink cross- tier interference (CI) in heterogeneous networks (HetNets) by the idea of opportunistic transmission. Firstly, we introduce the conventional opportunistic interference alignment (OIA) into HetNets and it indeed reduces the CI from the macrocell users (MUs) effectively. Interestingly, based on the unique characteristic in HetNets, the performance of OIA can be further improved. Therefore, the novel opportunistic interference mitigation (OIM) schemes based on adaptive reference signal spaces (A-RSSs) are proposed. In the novel OIM, an A-RSS is defined for each FBS and the A-RSS of a FBS constantly updates as the channel state information (CSI) of its FUs changes. According to the A-RSSs of all FBSs, each MU calculates its scheduling metric and the macrocell base station (MBS) selects MUs by the metrics. However, broadcasting the A-RSS constantly makes the system more complicated, so a complexity- performance tradeoff is considered. To decrease the complexity of the system, the quantization codebook is introduced and the quantized A-RSS based OIM is proposed. At last, extensive simulations are conducted. It is shown that, in terms of femtocells, the performance of novel OIM is better than that of the codebook based OIM (CB-OIM) and the performance of CB-OIM is better than that of conventional OIA.
Starting Page	1
Ending Page	5
File Size	312047
Page Count	5
File Format	PDF
ISBN	9781479980888
DOI	10.1109/VTCSpring.2015.7145957
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-05-11
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Interference Femtocells Macrocell networks Measurement Computer integrated manufacturing Uplink Quantization (signal)
Content Type	Text
Resource Type	Article

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