Journal ArticleDOI
Techniques for Interference Mitigation Using Cooperative Resource Partitioning in Multitier LTE HetNets
Rajkarn Singh,C. Siva Ram Murthy +1 more
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Two methods for joint ABS density calculation for macrocells and picocells are proposed—bitrate utility-based optimization and physical resource block (PRB) allocation ratio-based formulation and the concept of universal blanking pattern is introduced to coordinate among various base stations.Abstract:
Almost blank subframes (ABSs) have been proposed in the literature as a means to provide interference-free resources to mobile users. The use of ABS becomes inevitable in LTE heterogeneous cellular networks because of severe interference to small cells. Picocell edge users are typically the victims because of high interference exposure from macrocell tier. In case of hotspots with high-user density, picocells cannot provide coverage to the entire hotspot, thus forming a dense ring of macrocell users around picocells. These macrocell users are highly affected by picocell tier and hence should also be considered as victim users (VUEs). We propose that to protect these macrocell VUEs, macrocells and picocells should operate in a cooperative manner, such that not only macrocells should use ABS, but picocells should also use ABS to provide interference-free resources. We also introduce the concept of universal blanking pattern to coordinate among various base stations. We propose two methods for joint ABS density calculation for macrocells and picocells—bitrate utility-based optimization and physical resource block (PRB) allocation ratio-based formulation. Users with different bitrate demands are considered generating more realistic simulation scenarios. Exhaustive simulations illustrate that the proposed schemes offer significant improvement in VUE throughput as well as overall system throughput.read more
Citations
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Journal ArticleDOI
Coverage and Rate Analysis for Downlink HetNets Using Modified Reverse Frequency Allocation Scheme
Aneeqa Ijaz,Syed Ali Hassan,Syed Ali Raza Zaidi,Dushantha Nalin K. Jayakody,Syed Mohammad Hassan Zaidi +4 more
TL;DR: This paper presents a novel interference mitigation technique known as reverse frequency allocation (RFA), which provides an efficient resource allocation compared with the other state-of-the-art techniques.
Journal ArticleDOI
Time-domain ICIC and optimized designs for 5G and beyond: a survey
TL;DR: The main idea of time-domain interference coordination and two basic schemes in the eICIC standardization are presented, and a systematic introduction to the interactions of these techniques with other network functions are presented.
Journal ArticleDOI
Small-Macro Cell Cooperation for HetNet Uplink Transmission: Spectral Efficiency and Reliability Analyses
TL;DR: As macro-cell power increases, the results show that the proposed scheme achieves a full diversity order of two and outperforms all existing non-SMC schemes, suggesting the utility of the proposed schemes for potential deployment in 5G cellular networks.
Journal ArticleDOI
Energy Efficiency Optimization Based on eICIC for Wireless Heterogeneous Networks
TL;DR: Simulation results show that the optimized strategy outperforms other solutions in terms of EE and user fairness in average and can further improve the user satisfaction and the performance in the system.
Journal ArticleDOI
Overview on Interference Management Technology for Ultra-Dense Network
Danqing Zhang,Xinji Tian +1 more
TL;DR: This paper concludes that clustering and resource allocation are more suitable for UDN than interference alignment, clustering, and resource allocate in terms of principles.
References
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Journal ArticleDOI
Dynamic eICIC — A Proactive Strategy for Improving Spectral Efficiencies of Heterogeneous LTE Cellular Networks by Leveraging User Mobility and Traffic Dynamics
TL;DR: The approach is dynamic, and further improves performance by keeping the HetNet continuously optimized for improved user experience, by adapting the ABS in response to dynamic variations in network load.
Proceedings ArticleDOI
Optimized time-domain resource partitioning for enhanced inter-cell interference coordination in heterogeneous networks
TL;DR: The optimal amount of ABS for synchronous ABS configuration is studied by formulating this optimization as a network-wide utility maximization problem and a distributed method to determine victim UEs protected by ABS for any givenamount of ABS via dynamic programming is proposed.
Proceedings ArticleDOI
Resource allocation with carrier aggregation in LTE Advanced cellular system sharing spectrum with S-band radar
TL;DR: A carrier aggregation resource allocation algorithm to allocate the LTE Advanced and the radar carriers' resources optimally among users based on the type of user application and gives priority to users running inelastic traffic when allocating resources.
Proceedings ArticleDOI
On interference management based on subframe blanking in Heterogeneous LTE networks
TL;DR: A scheme based on almost blank subframes (ABS) defined in LTE-A to handle the interference in a HetNet scenario is proposed and it is observed that, the victim UE performance can be significantly improved with careful selection of ABS pattern at macro and femto eNodeBs within the cell.
Proceedings ArticleDOI
Dynamic Protected-Subframe Density Configuration in LTE Heterogeneous Networks
TL;DR: With dynamic traffic, it is found that in the majority of cases, dynamic configuration outperforms the static and with full buffer traffic, the impact of dynamic configuration is more noticeable in cases of large pico cell range expansions.