Decentralized interference coordination via autonomous component carrier assignment

Uygungelen, Serkan; Bharucha, Zubin; Auer, Gunther

doi:10.1109/glocomw.2011.6162441

Cited by 9 publications

(7 citation statements)

References 16 publications

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“…Therefore, the average data rate of the users can be reflected by the in the objective function if no intra-cell power control or dynamic bandwidth allocation is considered. Therefore, (9) and (6) have analogous function. Furthermore, the validation of this simplification will be given in Section V.…”

Section: B Problem Simplificationmentioning

confidence: 78%

“…However, the intra-tier interference of the LPNs was ignored in these studies. [9] and [10] considered to reserve some particular bandwidth for the cell edge users, but this may decrease the spectrum efficiency.…”

Section: Related Workmentioning

confidence: 99%

“…Furthermore, all PBSs require the same number of channels. Fig.5 shows the numerical results of problem (9) obtained by averaging 1000 random network topology samples. The X-axis is the number of channels required by each PBS, and the Y-axis is the value of the target function of problem (9), i.e., the maximal interference of the network.…”

Section: A Optimality Evaluationmentioning

confidence: 99%

“…1) The performance loss of our greedy algorithm compared with the optimal solution for problem (9); 2) The validation of the problem simplification from problem (6) to problem (9). …”

Section: Performance Evaluationmentioning

confidence: 99%

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A practical channel allocation scheme based on the weighted conflict graph in heterogeneous networks

Zhang

Zhou

Niu

et al. 2014

2014 IEEE/CIC International Conference on Communications in China (ICCC)

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Heterogeneous Networks (HetNets), where Low Power Nodes (LPN) are deployed under the coverage of Macro Base Stations (MBS), are promising to boost the spectrum efficiency per unit area. However, this hierarchical architecture also brings new problems, like severe inter-cell interference.The randomly deployed LPNs, and the co-existence of the cross-tier and intra-tier interference make it challenging to design the effective frequency reuse schemes, which can have significant influences on the user experience and the network capacity. In this paper, we explore the frequency reuse problem in HetNets for interference mitigation. Firstly, Partial Spectrum Reuse (PSR) scheme is adopted to mitigate the cross-tier interference, where MBSs can use all available spectrums while LPNs can only use part of the channels based on their traffic load. Then, the channel allocation scheme is further optimized to mitigate the intra-tier interference. As the channel allocation problem is NP-hard, we propose a greedy channel allocation scheme based on a weighted conflict graph, where cross-tier and intra-tier interference are both considered. In addition, our method is practical for channel allocation in real systems. Simulation results show the SINR of cell edge users and the ergodic SINR can be both improved by 3dB as much with our greedy method compared with the random channel allocation scheme.

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Section: B Problem Simplificationmentioning

confidence: 78%

Section: Related Workmentioning

confidence: 99%

Section: A Optimality Evaluationmentioning

confidence: 99%

“…1) The performance loss of our greedy algorithm compared with the optimal solution for problem (9); 2) The validation of the problem simplification from problem (6) to problem (9). …”

Section: Performance Evaluationmentioning

confidence: 99%

See 2 more Smart Citations

A practical channel allocation scheme based on the weighted conflict graph in heterogeneous networks

Zhang

Zhou

Niu

et al. 2014

2014 IEEE/CIC International Conference on Communications in China (ICCC)

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“…In these works, CCH interference is handled by compelling different types of cells to use orthogonal resources. [11]- [13] are on the femtofemto HetNet. In these works, decentralized autonomous CC assignment based on measurement and sensing is studied.…”

Section: Introductionmentioning

confidence: 99%

Carrier Aggregation Based Interference Coordination for LTE-A Macro-Pico HetNet

Jiang

Wang

Zhu

et al. 2013

2013 IEEE 77th Vehicular Technology Conference (VTC Spring)

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The intensive downlink (DL) inter-cell interference created by cell range expansion (CRE) of picocells is an urgent problem needing to be solved under macro-pico heterogeneous network (HetNet) scenario. A promising approach is taking advantage of additional degree of freedom brought by carrier aggregation (CA). However, poorly arranged carrier configurations or interference coordination schemes can lead to a degradation of system overall performance. In this paper, we propose a novel dynamic interference coordination scheme based on carrier aggregation to alleviate the DL interference from macrocells to users located in the cell range expansion area. Novel carrier configuration pattern and dynamic power control scheme based on price algorithm are applied to mitigate detrimental interference to picocell-edge users and improve the availability of macrocells. Simulation results show that the proposed scheme can boost the picocell-edge throughput significantly while ameliorating the overall system throughput.Index Terms-interference coordination; carrier aggregation (CA); cell range expansion (CRE); heterogeneous network (Het-Net); power control; price algorithm

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