Femto-Cell Resource Partitioning

Bharucha, Zubin; Haas, Harald; Auer, Gunther; Cosovic, I.

doi:10.1109/glocomw.2009.5360723

Cited by 45 publications

(29 citation statements)

References 6 publications

(7 reference statements)

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“…Figures 7 and 6(a) reveal a very important problem that is expected to be encountered in systems with femto-cell deployment: extremely severe downlink interference originating from the HeNB, which renders the vulnerable macro UE incapable of achieving a useful downlink SINR. In Reference [22], the authors propose a method of mitigating this interference.…”

Section: Downlinkmentioning

confidence: 99%

Throughput enhancement through femto‐cell deployment

Bharucha

Haas

Saul

et al. 2010

Trans Emerging Tel Tech

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SUMMARYThis paper studies the impact of a femto-cell underlay deployment that shares radio frequency resources with urban macro-cells. Due to their random and uncoordinated deployment, femto-cells potentially cause destructive interference to macro-cells and vice versa. On the other hand, femto-cells promise to substantially enhance the spectral efficiency due to an increased reuse of radio resources. The performance of networks with indoor Home Evolved NodeB (HeNB) deployment is compared to a system where all users, including indoor users, are served by the outdoor macro Evolved NodeB (eNB). In addition, the impact of closedaccess and open-access femto-cell operation is examined. It is demonstrated that significant capacity gains can be achieved through such HeNB deployment, regardless of whether closed-access or open-access is considered. Results clearly indicate that the capacity gains through femto-cell deployment outweigh the additional interference they introduce.

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Section: Downlinkmentioning

confidence: 99%

Throughput enhancement through femto‐cell deployment

Bharucha

Haas

Saul

et al. 2010

Trans Emerging Tel Tech

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“…In order to cancel interference in heterogeneous networks, different interference mitigation techniques have been proposed [12,13]. One of the recent and effective approaches to deal with interference issues in heterogeneous networks is the interference alignment (IA) technique [14].…”

Section: Introductionmentioning

confidence: 99%

Physical-Layer Transmission Cooperative Strategies for Heterogeneous Networks

Ali¹,

Castanheira²,

Silva³

et al. 2016

Towards 5G Wireless Networks - A Physical Layer Perspective

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The deployment of small cells within the boundaries of a macro-cell is considered to be an effective solution to cope with the current trend of higher data rates and improved system capacity. In the current heterogeneous configuration with the mass deployment of small cells, it is preferred that these two cell types coexist over the same spectrum, because acquiring additional spectrum licenses for small cells is difficult and expensive. However, the coexistence leads to cross-tier/inter-system interference. In this context, this contribution investigates interference alignment (IA) methods in order to mitigate the interference of macro-cell base station towards the small cell user terminals. More specifically, we design a diversity-oriented interference alignment scheme with spacefrequency block codes (SFBC). The main motivation for joint interference alignment with SFBC is to allow the coexistence of two systems under minor inter-system information exchange. The small cells just need to know what space-frequency block code is used by the macro-cell system and no inter-system channels need to be exchanged, contrarily to other schemes recently proposed. Numerical results show that the proposed method achieves a performance close to the case where full-cooperation between the tiers is allowed.

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“…In this context, the wireless networks require more careful and dynamic planning and if these two systems are not carefully designed then it will cause harmful interference, hence degrading the performance of both macro-cell and small-cell systems [14]. In order to deal with interference issues in heterogeneous networks different interference management techniques have been proposed [15]- [17]. Also multiple antenna techniques in combination with CR have been considered in some publications [18], [19].…”

Section: Introductionmentioning

confidence: 99%