Bandwidth Management for Mobile Media Delivery

Sanjeev Mehrotra, Hua Chen, Sourabh Jain, Jin Li, Baochun Li, and Minghua Chen

Abstract

Mobile broadband networks using 3G and 4G technologies

(such as EV-DO, HSPA, WiMAX, LTE) are rapidly

becoming one of the prominent means to access the Internet.

Multimedia consumption— requiring low delay, high bandwidth,

or a combination of both—is projected to become a large portion

of bandwidth utilization in mobile broadband networks. In this

paper, we study the fundamental problem of how packet loss

and delay vary as a function of the transmission rate over these

networks. With extensive real-world measurement studies, we

analyze the performance of a number of rate control algorithms

commonly used in media transmission. We show that the variable

nature of congestion signals (loss and delay) on these networks

leads to an ultimate failure of existing rate control strategies

to deliver adequate performance for multimedia applications.

In addition, we show how a rate control algorithm derived

from the utility maximization framework — which uses queuing

delay as the primary congestion signal — can be modified

to solve the challenging issues we have observed. By using a

variable threshold to define when the network is congested, our

proposed solution is able to achieve a significant improvement

over algorithms that use fixed definitions of congestion.

Details

Publication typeProceedings
Published inIEEE GLOBECOM 2012
PublisherIEEE Communications Society
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