This thesis is dedicated to the analysis and the design of sparse-graph codes for channel coding. The aim is to construct coding schemes having high performance both in the waterfall and in the error-floor regions under iterative decoding. In the first part, a new class of LDPC codes, named hybrid LDPC codes, is introduced. Their asymptotic...
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October 3, 2008 (v1)PublicationUploaded on: December 2, 2022
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August 1, 2016 (v1)Journal article
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June 7, 2023 (v1)Conference paper
Adaptive bitrate (ABR) algorithms are used in streaming media to adjust video or audio quality based on the viewer's network conditions to provide a smooth playback experience. With the rise of virtual reality (VR) headsets, 360° video streaming is growing rapidly and requires efficient ABR strategies to also adapt the video quality to the...
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June 2013 (v1)Conference paper
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May 2012 (v1)Conference paper
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June 14, 2022 (v1)Conference paper
While 360° videos watched in a VR headset are gaining in popularity, it is necessary to lower the required bandwidth to stream these immersive videos and obtain a satisfying quality of experience. Doing so requires predicting the user's head motion in advance, which has been tackled by a number of recent prediction methods considering the video...
Uploaded on: December 3, 2022 -
September 2014 (v1)Conference paper
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March 22, 2017 (v1)Conference paper
We consider Delay Tolerant Mobile Social Networks (DTMSNs), made of wireless nodes with intermittent connections and clustered into social communities. The lack of infrastructure and its reliance on nodes' mobility make routing a challenge. Network Coding (NC) is a generalization of routing and has been shown to bring a number of advantages...
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June 2015 (v1)Conference paper
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July 2017 (v1)Conference paper
5G services and 4K will stress even more the future access/aggregation networks, where video contents have already become the main traffic contributor. The deployment in the convergent access of local micro data-centers (DCs) nodes is one promising approach to successfully manage this challenge. These nodes will be responsible for switching...
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November 2016 (v1)Book section
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Uploaded on: December 4, 2022 -
July 2016 (v1)Conference paper
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September 2017 (v1)Conference paper
Video traffic is a key-challenge for fixed and mobile operators facing variable and massive load and variety of Over- The-Top (OTT) videos. Energy consumption is also a heavy Opex component, where the Fixed-Mobile Convergence is a promising solution, built on on economical optic fibers and LTE base- band operations consolidation. By combining...
Uploaded on: February 28, 2023 -
December 2016 (v1)Conference paper
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April 10, 2016 (v1)Conference paper
The interplay between caching and HTTP Adaptive Streaming (HAS) is known to be intricate, and possibly detrimental to QoE. In this paper, we make the case for caching-aware rate decision algorithms at the client side which do not require any collaboration with cache or server. To this goal, we introduce the optimization model which allows to...
Uploaded on: February 28, 2023 -
May 20, 2018 (v1)Conference paper
A prominent portion of the traffic carried by In-ternet Service Providers (ISP) is delivered by Content Delivery Networks (CDNs). CDNs usually deploy their own caches at ISPs in addition to the servers deployed in their own premises. With the adoption of multipath transport protocols such as MPTCP, content consumers are able to retrieve their...
Uploaded on: February 27, 2023 -
September 2011 (v1)Conference paper
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June 13, 2018 (v1)Conference paper
MPEG-DASH and MPTCP are two technologies growing in interest and put together they promise greater quality of experience for video consumers and better network resource usage. However, while independent MPEG-DASH and MPTCP implementations exist for ns-3, they are not directly usable together as they suffer from incompatibilities. In this work,...
Uploaded on: December 4, 2022 -
October 13, 2016 (v1)Conference paper
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February 2013 (v1)Journal article
Delay tolerant Networks (DTNs) leverage the mobility of relay nodes to compensate for lack of persistent connectivity. In order to decrease message delivery delay, the information to be transmitted can be replicated in the network. For general packet arrivals at the source and two-hop routing, we derive performance analysis of replication-based...
Uploaded on: December 2, 2022 -
February 2013 (v1)Journal article
Delay tolerant Networks (DTNs) leverage the mobility of relay nodes to compensate for lack of persistent connectivity. In order to decrease message delivery delay, the information to be transmitted can be replicated in the network. For general packet arrivals at the source and two-hop routing, we derive performance analysis of replication-based...
Uploaded on: October 11, 2023 -
March 14, 2010 (v1)Conference paper
We study replication mechanisms that include Reed- Solomon type codes as well as network coding in order to improve the probability of successful delivery within a given time limit. We propose an analytical approach to compute these and study the effect of coding on the performance of the network while optimizing parameters that govern routing.
Uploaded on: December 3, 2022 -
February 6, 2018 (v1)Conference paper
—In distributed file systems, Random-Linear-Coding (RLC) reduces scheduler complexity and download time by eliminating the coupon collector problem [1]. Similar benefits for video streaming in Distributed Video Caching and Sharing (DVCS) systems require segmentation of videos into codeblocks, over which RLC can be applied, to ensure videos'...
Uploaded on: February 28, 2023