Caching architectures and optimization strategies for IPTV networks

Krogfoss, Bill; Sofman, Lev B.; Agrawal, Anshul

doi:10.1002/bltj.20320

Cited by 18 publications

(7 citation statements)

References 6 publications

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“…O projeto deste armazenamento foi estudado para as redes de televisão por cabo (Wauters et al, 2007), para os serviços baseados na Internet (Ho, Poon, & Lo, 2007) e para os serviços de IPTV (D. De Vleeschauwer & Laevens, 2009;Krogfoss, Sofman, & Agrawal, 2008;Verhoeyen, De Vleeschauwer, & Robinson, 2008). Outras investigações também desenvolveram algoritmos para prever qual o conteúdo mais procurado e definir onde cada tipo de programa deve ser gravado (Danny De Vleeschauwer et al, 2009 (Bury & Li, 2015).…”

Section: Revisão Aprofundada Da Literaturaunclassified

O desenvolvimento da TV não linear e a desprogramação da grelha

Becker

Abreu

Nogueira

et al. 2018

(OBS*)

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Este artigo discute as mudanças em curso na televisão, acentuadas pelo aumento da oferta de conteúdos fornecidos on-demand. Tais conteúdos são disponibilizados, principalmente, por operadores de TV por assinatura, possibilitando uma experiência de TV não linear. Para caracterizar o cenário internacional da oferta de conteúdos de TV não linear, realizou-se uma pesquisa em 62 países que permitiu catalogar as diversas tipologias de serviços oferecidos. Complementarmente, foi feita uma revisão detalhada da literatura referente ao tema que evidenciou a inexistência de levantamentos similares. Desta forma, podese constatar a crescente oferta de serviços de TV não linear, comportando dois efeitos: 1. uma migração da audiência televisiva para estes serviços, com mudanças estruturais, ainda que incipientes, na organização dos programas e das narrativas; 2. um fortalecimento da televisão em direto (ao vivo) na TV tradicional, linear. Neste enquadramento, o presente artigo fornece bases empíricas para análises teóricas aprofundadas, discutindo um tema ainda incipiente nas ciências da comunicação e áreas correlacionadas.Palavras chave: Catch-up TV, grelha de programação, vídeo on-demand, TV em direto. AbstractThis article discusses the changes taking place on television, accentuated by the increased supply of ondemand content. Such content is made available primarily by pay-TV providers, allowing a non-linear TV experience. To frame the international scene offering non-linear TV content, a survey was conducted in 62 countries, where the offered services were catalogued. In addition, a detailed review of the relevant literature was made, being possible to realize the lack of similar surveys. In this scope, one can note the growing supply of non-linear TV services, with two effects: 1. a migration of the audience to these services, with structural changes, even if incipient, in the organization of programs and narratives; 2. A reinforcement of live television in the traditional linear TV. The present article provides an empirical basis for in-depth theoretical analysis, discussing a still incipient topic in communication sciences and related areas.Keywords: Catch-up TV, programming schedule, video on-demand, live TV. IntroduçãoA televisão tem sido objeto de estudo em inúmeras áreas. Cientistas e investigadores têm-se dedicado a estudar a televisão em áreas como a produção de conteúdos, tecnologias de transmissão e recepção, a forma como as pessoas consomem o conteúdo, o impacto da programação na sociedade, formas de publicidade, modelos de negócio, opinião pública, psicologia, sociologia, entre outras.Uma área que, de forma direta ou indireta afeta todas as restantes, centra-se no desenvolvimento e na introdução de novas tecnologias, especialmente do lado do cliente. É amplamente reconhecido que as novas tecnologias afetam especialmente o consumo e o modelo de negócios. Por exemplo, o surgimento dos

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Section: Revisão Aprofundada Da Literaturaunclassified

O desenvolvimento da TV não linear e a desprogramação da grelha

Becker

Abreu

Nogueira

et al. 2018

(OBS*)

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“…In [1], [2], the authors argue that the evolution of IPTV services from VoD to TimeShiftedTV services causes an explosion in the requested resources which can only be tackled by effectively caching requested multimedia content. Several caching algorithms have been proposed for streaming multimedia services [3], [4].…”

Section: Related Workmentioning

confidence: 99%

Towards intelligent scheduling of multimedia content in future access networks

Famaey

Meerssche

Latré

et al. 2010

2010 IEEE Network Operations and Management Symposium - NOMS 2010

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Abstract-The popularity of streaming multimedia services has greatly increased in recent years. Telco-and cable-providers have started offering a plethora of multimedia services in the access and aggregation network, including video on demand, interactive digital television, and time-shifted TV. However, these services introduce additional challenges, such as stringent time constraints, and high bandwidth requirements. To overcome these problems, we explore the advantages of delivering such multimedia content using deadline-aware scheduling and caching algorithms. These algorithms decide when to send and store which content. This enables the network to optimize bandwidth consumption and satisfy deadline constraints.The designed algorithm was evaluated and compared to classical deadline-unaware delivery protocols. This allows us to study the efficiency of the new algorithm, and identify the scenarios in which deadline-aware scheduling improves delivery of multimedia content.

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“…In a typical IPTV architecture, the video objects may be stored in caches positioned closer to the subscribers either at the Digital Subscriber line Access Multiplexers (DSLAMs), Central Offices (COs), or the Intermediate Offices (lOs) [3].…”

Section: Introductionmentioning

confidence: 99%

A dynamic popularity-based partial caching scheme for video on demand service in IPTV networks

Agrawal¹,

Venkatesh

Medhi

2014

2014 Sixth International Conference on Communication Systems and Networks (COMSNETS)

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Caching video objects closer to the users in delivery of on-demand video services in IPTV networks reduces the load on the network and improves the latency in video delivery.Partial caching of the video objects is attractive due to the space constraints of the cache and also due to the fact that some parts of the video might be more popular than the others. However, fixed segment-based caching of videos does not take into account the changing popularity of the segments and the changes in the viewing patterns of the users. In this work, we propose a partial caching strategy that considers the changes in the popularity of the segments over time and the access patterns of the users to compute the utility of the objects in the cache. We also propose to partition the cache to avoid the eviction of the popular objects (those not accessed frequently) by the unpopular ones which are accessed with higher frequency. We measured the popularity distribution and ageing of popularity from two online datasets and use the parameters in simulations. Our simulation resultsshow that the proposed caching scheme improves the byte hit ratio when compared to the LRU caching scheme both for static and dynamic object pools and ageing of popularity.

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Caching architectures and optimization strategies for IPTV networks

Cited by 18 publications

References 6 publications

O desenvolvimento da TV não linear e a desprogramação da grelha

O desenvolvimento da TV não linear e a desprogramação da grelha

Towards intelligent scheduling of multimedia content in future access networks

A dynamic popularity-based partial caching scheme for video on demand service in IPTV networks

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