System performance of interference alignment under TDD mode with limited backhaul capacity

Deghel, Matha; Assaad, Mohamad; Debbah, Mérouane

doi:10.1109/icc.2015.7248565

“…Thus, the IA technique adopted is able to completely suppress the ISI since local CSI is perfectly known, but not the IUI because of the quantization process which leads to imperfect global CSI at the transmitters. Under such conditions and using the results in [24], the signal-to-interference-plus-noise ratio (SINR) for stream m at receiver k can be expressed…”

Section: A Average Transmission Ratementioning

confidence: 99%

On the benefits of edge caching for MIMO interference alignment

Deghel

¹

,

Baştuğ

²

,

Assaad

³

et al. 2015

2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)

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In this contribution, we jointly investigate the benefits of caching and interference alignment (IA) in multiple-input multiple-output (MIMO) interference channel under limited backhaul capacity. In particular, total average transmission rate is derived as a function of various system parameters such as backhaul link capacity, cache size, number of active transmitter-receiver pairs as well as the quantization bits for channel state information (CSI). Given the fact that base stations are equipped both with caching and IA capabilities and have knowledge of content popularity profile, we then characterize an operational regime where the caching is beneficial. Subsequently, we find the optimal number of transmitter-receiver pairs that maximizes the total average transmission rate. When the popularity profile of requested contents falls into the operational regime, it turns out that caching substantially improves the throughput as it mitigates the backhaul usage and allows IA methods to take benefit of such limited backhaul. Index Termsedge caching, interference alignment, limited backhaul, wireless networks, 5G cellular networks.

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“…Thus, the IA technique adopted is able to completely suppress the ISI since local CSI is perfectly known, but not the IUI because of the quantization process which leads to imperfect global CSI at the transmitters. Under such conditions and using the results in [24],…”

Section: A Average Transmission Ratementioning

confidence: 99%

On the Benefits of Edge Caching for MIMO Interference Alignment

Deghel,

Baştuğ,

Assaad

et al. 2015

Preprint

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0

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In this contribution, we jointly investigate the benefits of caching and interference alignment (IA) in multiple-input multiple-output (MIMO) interference channel under limited backhaul capacity. In particular, total average transmission rate is derived as a function of various system parameters such as backhaul link capacity, cache size, number of active transmitter-receiver pairs as well as the quantization bits for channel state information (CSI). Given the fact that base stations are equipped both with caching and IA capabilities and have knowledge of content popularity profile, we then characterize an operational regime where the caching is beneficial. Subsequently, we find the optimal number of transmitter-receiver pairs that maximizes the total average transmission rate. When the popularity profile of requested contents falls into the operational regime, it turns out that caching substantially improves the throughput as it mitigates the backhaul usage and allows IA methods to take benefit of such limited backhaul.

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Interference Management inD2D

Denis¹,

Assaad²

2020

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Device‐to‐device (D2D) technology is a promising communication paradigm that enables direct communication between spatially close devices. The D2D technology is very appealing from the standpoint of efficient spatial reuse of resources since it permits to establish communications in networks with higher density of users. Consequently, the introduction of D2D will lead to network performance improvement in terms of spectral and energy efficiency, power consumption, delay reduction, as well as coverage extension. However, implementing D2D technology in 5G networks comes with a set of technical challenges, mainly due to interferences incurred between D2D links and between D2D and cellular users. This article provides a survey of the main interference management frameworks in D2D network in general and underlay D2D communication, in particular. Interference management‐based frameworks can be divided into two main categories: (i) power control and resource management schemes and (ii) advanced physical layer schemes, such as interference cancellation, interference alignment, and multiantenna systems. We provide a brief description of the main studies for the aforementioned categories and discuss the main results.

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System performance of interference alignment under TDD mode with limited backhaul capacity

Cited by 6 publications

References 14 publications

On the benefits of edge caching for MIMO interference alignment

On the benefits of edge caching for MIMO interference alignment

On the Benefits of Edge Caching for MIMO Interference Alignment

Interference Management inD2D

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