C. K. Kodikara

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Following its success over wired networks, the deployment of the Internet Protocol (IP) over wireless networks is an increasingly popular topic. Protocol optimisations implemented at this level only consider the traditional Internet applications. Path maximum transfer unit (MTU) discovery algorithms are designed to avoid packet fragmentation along the(More)
The poor performance of video compression algorithms in time-varying mobile channels means that the transmission of compressed video over mobile networks is a challenging task. The paper presents a performance enhancement technique for streaming video that makes use of link adaptation. Link adaptation is not generally considered suitable for multi-user(More)
In this paper, a novel adaptive resource allocation algorithm for video services over UTRAN is proposed. The proposed algorithm deploys joint spreading gain control and transmission power allocation to enhance the performance of real-time video communications over time-varying errorprone environments. The proposed algorithm operates in two phases. In the(More)
To date, video traffic models in the literature have mostly considered the autocorrelation modeling of empirical video traffic for fixed source quantization parameters. Existing models also ignore the inter-dependencies between I-, P-, and Bframe types of MPEG4 coding, which have great impact on empirical queuing performance prediction accuracy. We propose(More)
A novel joint unequal error protection (UEP) and unequal power allocation (UPA) algorithm is proposed. UEP is performed through multiple radio bearers with different error correction capabilities. The perceived video quality is estimated based on the distortion calculation at the encoder. The transmission power on each bearer is controlled to maximize the(More)
The poor performance of video compression algorithms in time-varying mobile channels means that the transmission of compressed video over mobile networks is a challenging task. This paper presents a performance enhancement technique for streaming video that makes use of link adaptation. Link adaptation is not generally considered suitable for multi-user(More)
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