Improving Resource Utilization for Internet Mobile Streaming Services
Başlık:
Improving Resource Utilization for Internet Mobile Streaming Services
Yazar:
Xiao, Mengbai, author.
ISBN:
9780438115262
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (137 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 79-11(E), Section: B.
Advisors: Songqing Chen Committee members: Fei Li; Brian L. Mark; Robert Simon.
Özet:
Mobile devices, e.g., smartphones and tablets, are gaining prevailing popularity nowadays. Internet streaming services are one of the most popular entertainment activities on mobile devices, such as watching and sharing videos on their mobile devices. However, the resources on mobile devices are constrained, particularly the inherently limited battery power supply. While multiple subsystems, including the CPU, display and the network interface, of a mobile device, are simultaneously involved in a typical streaming session, power saving techniques are proposed and applied to them individually. As the CPU consumes lower battery power during a streaming session due to the widely supported hardware decoder, a number of existing studies have mainly focused on the two other subsystems. To effectively reduce the power consumption of the display subsystem, a technique named backlight scaling is proposed. It reduces the power consumption on LCD by dimming the backlight scaling while compensating the pixel luminance for eliminating perceptual distortion. For the transmission subsystem, most techniques take advantage of the corresponding sleep mode in various network interfaces. By aggregating the network transmissions, the power consumption of network interfaces can be effectively reduced. Furthermore, the emerging 360-degree video streaming service to Virtual Reality (VR) devices over Internet demand prohibitive bandwidth. Tiling the video and delivering the invisible portions with a lower quality is a promising means to reduce the bandwidth demand for 360-degree video streaming.
However, with the increasing size of the display and the increasing duration of video clips, the power consumption by the display and transmission subsystems is also increasing, while existing schemes are either impractical or providing little help. Thus, in this dissertation, we aim to investigate new schemes for battery power saving on mobile devices for streaming services. To save the energy consumed by the display subsystem, we adopt the backlight scaling on the mobile platform. While this technique is computation intensive and existing solutions either offload some processing out of the mobile device or skips the processing requiring lots of computation, our design takes advantage of the GPU to integrate all computation intensive processing of backlight scaling on the smartphones. To save energy consumed by the transmission subsystem, we propose a streaming method based on the newly standardized HTTP/2 and its server push mechanism to help network interfaces enter the sleep mode more efficiently, while also taking users' behavior into consideration. We further incorporate user QoE into our scheme to save energy while not degrading the streaming quality. Lastly, for the emerging 360-degree video streaming on the VR devices, existing solutions fail to jointly exploit the spatial and the temporal adaptability, leaving the delivery of video content suboptimal in terms of the bandwidth allocation. We optimize the 360-degree video delivery by simultaneously taking these two dimensions of adaptability into account, and the novel features of stream priority and stream termination in HTTP/2 are also leveraged in our design to further optimize the 360-degree video streaming performance.
Notlar:
School code: 0883
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(692528.1) | 692528-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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