Caching in heterogeneous satellite networks with fountain codes

Recayte, Estefania; Lázaro, Francisco; Liva, Gianluigi

doi:10.1002/sat.1323

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…MDS caching schemes have been studied in wireless networks to minimize the expected download time [3] or to reduce the amount of data to be sent [4]. Recently, practical caching schemes based on linear random codes in [5] and based on LT codes in [6] have also been proposed.…”

Section: Introductionmentioning

confidence: 99%

Edge Caching: On the Performance of Placement and Delivery Coding Schemes

Recayte

2023

IEEE Trans. Commun.

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We study the performance of caching schemes based on two different coding techniques. A heterogeneous network is assumed, in which cache-aided relays are connected through a backhaul link to a master node while no connection exits between users and the master node. The first caching scheme considers to fill the cache with encoded content while the second scheme considers to encode the content during the delivery phase. We compare the schemes by characterizing the average transmission load when users ask for downloading content to the network. We provide an approximation of the expression of the average load which allows a fast evaluation of the network behavior for each scheme considered. We further assume a constraint on the capacity of the backhaul link and derive the expression of the outage probability, i.e. the probability that the system is not able to serve the entire set of users demands. Finally, we examine and discuss how the derived analysis of a two relays scenario can be scaled to study the performance of a network with a generic number of relays.

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Section: Introductionmentioning

confidence: 99%

Edge Caching: On the Performance of Placement and Delivery Coding Schemes

Recayte

2023

IEEE Trans. Commun.

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“…In this case, user terminals are typically not equipped with direct satellite connectivity, and the intermediate tier is responsible to forward content from one end to the other. In this context, only few works have investigated the performance of caching schemes [9], and the outage behaviour remains unexplored. Notably, new trade-offs arise, as a proper dimensioning of the satellite link capacity and cache size at ground relays becomes crucial in determining the quality of experience at the end-users.…”

Section: Introductionmentioning

confidence: 99%

Caching at the Edge: Outage Probability

Recayte

Munari

2021

2021 IEEE Wireless Communications and Networking Conference (WCNC)

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Caching at the edge of wireless networks is a key technology to reduce traffic in the backhaul link. However, a concentrated amount of requests during peak-periods may cause the outage of the system, meaning that the network is not able to serve the whole set of demands. The outage probability is a fundamental metric to take into account during the network design. In this paper, we derive the analytical expression of the outage probability as a function of the total amount of users requests, library size, requests distribution, cache size and capacity constraints on the backhaul resources. In particular, we focus on a scenario where end-users have no direct connection to the master node which holds the complete library of content that can be requested. A general formulation of the outage is derived and studied for two relevant caching schemes, i.e. the random caching scheme and the most popular caching schemes. The exact closed form expressions presented in this paper provide useful insights on how requests, memory and resources can be balanced when the parameters of a cache-enabled network have to designed.

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Fountain Coded Streaming for SAGIN With Learning-Based Pause-and-Listen

Ren

Gao

et al. 2023

IEEE Netw. Lett.

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Caching in heterogeneous satellite networks with fountain codes

Cited by 4 publications

References 16 publications

Edge Caching: On the Performance of Placement and Delivery Coding Schemes

Edge Caching: On the Performance of Placement and Delivery Coding Schemes

Caching at the Edge: Outage Probability

Fountain Coded Streaming for SAGIN With Learning-Based Pause-and-Listen

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