Smarter Wireless - Smarter Content Delivery
Smarter Content Delivery
The rapid proliferation of smart mobile devices over the past few years is leading to an unprecedented growth in the mobile data traffic. This growth is severely stressing the wireless access link as well as the cellular backhaul and core networks. Our smarter content delivery work seeks to ease this mounting pressure on cellular networks in a cost-effective manner while improving end-user quality-of-experience and boosting operator revenues.
Some representative projects in this area are:
Async: Asynchronous Content Delivery and Pricing in Cellular Data Networks
The Async project explores effective management of mobile data traffic growth through network-managed time-shifting of traffic. Specifically, Async introduces an alternate "asynchronous" content delivery paradigm for heavy content such as videos, and facilitates a service provider to control when, and at what price the content is delivered to the users. At the same time, Async empowers users to select from a multitude of price and expected delivery time choices. Conceptually, Async leverages the delay-elastic nature of some applications, and the price-sensitive nature of some users to enable an opportunistic delivery model. This way, Async helps reduce the operational cost while meeting content delivery expectations. Async is robust to disconnections, and it does not require any modifications to the existing network infrastructure and protocols, making it easier to adopt in practice.
Async: Decongestion and Yield Management in Cellular NetworksV. Gabale, U. Devi, R. Kokku, V. Kolar, M. Madhavan, S. Kalyanaraman
IEEE International Conference on Network Protocols, 2013
In The News! Airwaves To Be Optimised With Delayed DownloadsAppeared in Financial Chronicle, January 22, 2014. Here is the link.
In The News! Tech Solutions To Enable Smarter Pricing For TelcosAppeared in The Hindu, November 19, 2013. Here is the link.
Optimized Delivery of a Group of Videos
Video constitutes a major fraction of the mobile data traffic and is expected to continue to grow. Compressed video is inherently variable bit rate (VBR), which complicates its delivery over an inherently variable wireless channel This project explores how multiple VBR videos can be multiplexed over a time-varying wireless channel while still maintaining a good QoE at the mobile clients.
On Managing Quality of Experience of Multiple Video Streams in Wireless NetworksP. Dutta, A. Seetharam, V. Arya, M. Chetlur, S. Kalyanaraman, J. Kurose
IEEE INFOCOM 2012
Edge Caching Solutions
The growth in mobile data traffic is also stressful to inadequately provisioned cellular backhaul links. Rolling out upgrades and expanding capacity are often expensive. One way of deferring such upgrades is by caching frequently-accessed content at the cell edge, such as, at the base stations. This project explores caching video objects, which account for two-thirds of the mobile data, at the edge. Since video objects are orders of magnitude larger than traditional web objects, traditional caching solutions do not suffice. Cooperatively caching across multiple base stations and caching objects partially are explored.
On the Partial Caching of Streaming VideoU. Devi, R. Polavarapu, M. Chetlur, and S. Kalyanaraman
20th IEEE International Workshop on Quality of Service, 2012
Object Placement for Cooperative Caches with Bandwidth ConstraintsU. Devi, M. Chetlur, and S. Kalyanaraman