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Title: Adaptive subframe allocation for next generation multimedia delivery over hybrid LTE unicast broadcast
Authors: Christodoulou, Louis
Abdul-Hameed, Omar
Kondoz, Ahmet
Calic, J.
Issue Date: 2016
Publisher: © IEEE
Citation: CHRISTODOULOU, L. ...et al., 2016. Adaptive subframe allocation for next generation multimedia delivery over hybrid LTE unicast broadcast. IEEE Transactions on Broadcasting, 62 (3), pp.540-551.
Abstract: The continued global roll-out of long term evolution (LTE) networks is providing mobile users with perpetually increasing ubiquitous access to a rich selection of high quality multimedia. Interactive viewing experiences including 3-D or free-viewpoint video require the synchronous delivery of multiple video streams. This paper presents a novel hybrid unicast broadcast synchronisation (HUBS) framework to synchronously deliver multi-stream content. Previous techniques on hybrid LTE implementations include staggered modulation and coding scheme grouping, adaptive modulation coding or implementing error recover techniques; the work presented here instead focuses on dynamic allocation of resources between unicast and broadcast, improving stream synchronisation as well as overall cell resource usage. Furthermore, the HUBS framework has been developed to work within the limitations imposed by the LTE specification. Performance evaluation of the framework is performed through the simulation of probable future scenarios, where a popular live event is broadcast with stereo 3-D or multi-angle companion views interactively offered to capable users. The proposed framework forms a ``HUBS group'' that monitors the radio bearer queues to establish a time lead or lag between broadcast and unicast streams. Since unicast and broadcast share the same radio resources, the number of subframes allocated to the broadcast transmission are then dynamically increased or decreased to minimise the average lead/lag time offset between the streams. Dynamic allocation showed improvements for all services across the cell, whilst keeping streams synchronised despite increased user loading.
Description: Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Version: Accepted
DOI: 10.1109/TBC.2016.2570020
URI: https://dspace.lboro.ac.uk/2134/21818
Publisher Link: http://dx.doi.org/10.1109/TBC.2016.2570020
ISSN: 0018-9316
Appears in Collections:Published Articles (Loughborough University London)

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