Erasure broadcast networks with receiver caching

Bidokhti, Shirin Saeedi; Wigger, Michèle; Timo, Roy

doi:10.1109/isit.2016.7541613

Cited by 35 publications

(47 citation statements)

References 8 publications

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“…Recently, in wireless networks, a line of prior works 55,[136][137][138] has considered caching in the presence of noisy links and feedback. In related works, [139][140][141][142][143] caching as an aide to wireless interference mitigation was studied.…”

Section: Impact On System Performancementioning

confidence: 99%

The role of caching in next generation cellular networks: A survey and research outlook

Kabir

Rehman

Gilani

et al. 2019

Trans Emerging Tel Tech

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Mobile applications and social networks tend to enhance the needs for high‐quality content access. To address the expeditious growing demand for data services in 5G cellular networks, it is important to develop distribution techniques and an efficient content caching, aiming to significantly reduce redundant data transmission and, thus, improve the efficiency of the networks. In modern communication systems, caching has emerged as a vital tool for reducing peak data rates. It is anticipated that energy harvesting and self‐powered small base stations are the fundamental part of next‐generation cellular networks. However, uncertainties in energy are the main reason to adopt energy efficient power control schemes to reduce SBS energy consumption and ensure the quality of services for users. Using the edge cooperative caching such as energy efficient design can also be achievable, which reduces the usage of the capacity limited SBSs backhaul and the energy consumption. To support the huge power demand of cellular network, renewable energy harvesting technologies can be leveraged. In addition to this, power supply to the infrastructures is the main challenge to the mobile network operators (MNOs) especially in terms of economic optimum, sustainability, and green energy in developing countries for the growth of cellular networks. Renewable energy–based solutions for MNOs not only reduce the overall carbon dioxide emissions but also provide numerous profits.

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Section: Impact On System Performancementioning

confidence: 99%

The role of caching in next generation cellular networks: A survey and research outlook

Kabir

Rehman

Gilani

et al. 2019

Trans Emerging Tel Tech

View full text Add to dashboard Cite

show abstract

“…In [25]- [27] the gains of caching in noisy broadcast networks are investigated. Specifically, we have proposed a joint cache-channel coding scheme and focused on erasure BCs with two sets of receivers: a set of cache-aided weak receivers (where each channel has the same erasure probability) and a set of strong receivers without cache memories (where each channel has the same erasure probability).…”

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confidence: 99%

“…The joint cache-channel coding scheme in [25]- [27] loads (piggybacks) the information that is intended for the strong receivers, but is already cached at the weaker receivers, onto the information that is communicated to the weak receivers 1 . When the rate of the piggybacked information is modest, this can be done without harming the decoding performance at the strong receivers.…”

mentioning

confidence: 99%

“…The previous works [25]- [27] have shown that when different receivers have different channel statistics, then assigning larger cache memories to the weaker receivers significantly improves the performance compared to the traditional uniform cache assignment. In addition to mitigating the rate-bottleneck at the weaker receivers, nonuniform cache assignment allows to achieve new global caching gains by the means of joint cache-channel coding [25]- [27,32].…”

mentioning

confidence: 99%

“…In addition to mitigating the rate-bottleneck at the weaker receivers, nonuniform cache assignment allows to achieve new global caching gains by the means of joint cache-channel coding [25]- [27,32].…”

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confidence: 99%

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Benefits of cache assignment on degraded broadcast channels

Bidokhti

Wigger

Yener

2017

2017 IEEE International Symposium on Information Theory (ISIT)

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Degraded K-user broadcast channels (BC) are studied when receivers are facilitated with cache memories. Lower and upper bounds are derived on the capacity-memory tradeoff, i.e., on the largest rate of reliable communication over the BC as a function of the receivers' cache sizes, and the bounds are shown to match for some special cases.The lower bounds are achieved by two new coding schemes that benefit from non-uniform cache assignment. Lower and upper bounds are also established on the global capacity-memory tradeoff, i.e., on the largest capacity-memory tradeoff that can be attained by optimizing the receivers' cache sizes subject to a total cache memory budget. The bounds coincide when the total cache memory budget is sufficiently small or sufficiently large, characterized in terms of the BC statistics. For small cache memories, it is optimal to assign all the cache memory to the weakest receiver. In this regime, the global capacity-memory tradeoff grows as the total cache memory budget divided by the number of files in the system. In other words, a perfect global caching gain is achievable in this regime and the performance corresponds to a system where all cache contents in the network are available to all receivers. For large cache memories, it is optimal to assign a positive cache memory to every receiver such that the weaker receivers are assigned larger cache memories compared to the stronger receivers. In this regime, the growth rate of the global capacity-memory tradeoff is further divided by the number of users, which corresponds to a local caching gain.Numerical indicate suggest that a uniform cache-assignment of the total cache memory is suboptimal in all regimes unless the BC is completely symmetric. For erasure BCs, this claim is proved analytically in the regime of small cache-sizes.

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Delivery Design for Coded Caching Over Wireless Multicast Networks

et al. 2019

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In wireless multicast networks, different users may have quite different link qualities to the server, which will degrade the multicast performance of the coded caching scheme. In order to effectively handle the asymmetric link qualities and fulfill the fairness delivery requirement by a different user, a parallel delivery scheme is proposed to organize the wireless multicast physical channels into multiple logic parallel partially shared links. Each parallel partially shared link connects the server to a subset of users, and each user can receive coded signals from multiple parallel partially shared links, in which the superposition coding and successive interference cancellation techniques will be utilized to guarantee the recovery of each requested file. Since the parallel partially shared links provide the basis to reasonably balance the traffic load and to allocate the delivery rate among users, this parallel delivery scheme is able to guarantee the fairness transmission requirements and to effectively reduce the required delivery time per bit (DTB), which is defined as the normalized time spent on satisfying all the users' demands, for both the centralized and decentralized placement. INDEX TERMS Wireless multicast networks, coded caching, parallel delivery scheme.

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Erasure broadcast networks with receiver caching

Cited by 35 publications

References 8 publications

The role of caching in next generation cellular networks: A survey and research outlook

The role of caching in next generation cellular networks: A survey and research outlook

Benefits of cache assignment on degraded broadcast channels

Delivery Design for Coded Caching Over Wireless Multicast Networks

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