Research Articles

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https://hdl.handle.net/20.500.14155/199

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Browsing Research Articles by Author "Chan, H. A."

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    MPEG Video Streaming Solution for Multihomed-Terminals in Heterogeneous Wireless Networks
    (The 10th Annual IEEE CCNC- Work-in-Progress, 2013) Ramaboli, A. L.; Falowo, O. E.; Chan, H. A.
    Abstract-Most multipath video transmission schemes focus on minimizing video packets delivery time but do not consider protecting the video packets from loss. Packet loss can have undesirable effects on the video quality. This is especially true for frame-based video streams, such as Motion Pictures Group (MPEG) video, where the loss of a video frame can result in the loss of all the frames that depend on it for decoding. This propagation of loss to dependent frames can cause considerable video distortion, which, in turn, can lead to poor video presentation. This paper proposes a multipath MPEG video streaming solution that can prevent the loss of video frames while ensuring that the frames can be delivered to meet their playback deadlines. We show through trace-driven simulation that the proposed solution can achieve better results in terms of peak signal-to-noise ratio (PSNR), structural similarity index (SSIM) and visual quality.
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    Using Multiple Links Simultaneously to Increase Capacity for Multi-homed Terminals in Heterogeneous Wireless Networks
    (2013 IEEE 27th International Conference on Advanced Information Networking and Applications, 2013) Ramaboli, A. L.; Falowo, O. E.; Chan, H. A.
    Aggregating fractional bandwidth from multiple links in heterogeneous wireless networks can provide an opportunity for network providers to scale up capacity for multi-homed terminals. Multi-homed terminals come equipped with multiple interfaces, which can be used to transmit and receive data over multiple paths simultaneously. This can improve performance in terms of increased throughput, short delays, and loss resilience. However, parallel transmission over heterogeneous links can lead to problems, such as packet reordering. Packet reordering occurs when packets of the same stream arrive at the receiver out of the required order. Transmission Control Protocol (TCP) misinterprets packet reordering as congestion loss and reacts by shrinking the congestion window and launching spurious fast retransmit. Consequently, the application throughput can drop dramatically. Packet reordering can also induce additional delays, which can degrade performance of delay-sensitive applications. In this paper, we present a new multipath packet transmission solution that addresses packet reordering while ensuring that delay-sensitive packets are delivered to meet their deadlines. The proposed solution is evaluated in the ns-3 simulation environment. The simulation results reveal that our solution reduces packet reordering while improving throughput performance.