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In this paper, we propose TCP-friendly CMT, a novel TCP-friendly Stream Control Transmission Protocol (SCTP)-based Concurrent Multipath Transfer (CMT) solution necessitating the following aims: (i) fairness to TCP flows, (ii) load sharing, and (iii) improve multimedia delivery performance. To satisfy the first requirement, a Weighted Moving congestion window (WM-cwnd) based Additive Increase and Multiplicative...
TCP based HTTP video streaming is becoming more and more popular in recent years. However, for last-hop wireless access, due to TCP's additive increase/multiplicative decrease (AIMD) congest control mechanism, when interference and fading are strong, TCP streaming behaves poorly. In this research, we propose a new design of TCP video streaming proxy at the wireless base station. The new proxy's mission...
This paper presents the results of the performance evaluation concerning 3G/3GPP IP Multimedia Subsystem (IMS) applications deployed in a wireless multi-hop network controlled by the Delay-Aware Network Utility Maximization System (DANUMS). The main purpose of the DANUM system is simultaneous service of files and multimedia streams, i.e., types of traffic of different delay requirements. DANUMS combines...
The bandwidth in wireless networks is usually shared by a number of wireless nodes. The channel capacity depends on the number of accessing nodes, time, environmental conditions and location of nodes. Due to varying channel conditions, several issues are observed in the transmission of real time multimedia. The existing research on multimedia streaming can be classified into adaptation techniques...
TFRC over wireless access networks has poor performance because it accounts wireless losses as congestion losses. To solve the problem, an enhanced TFRC protocol based on step ECN marking is proposed. The simulations show that, with appropriate loss differentiation and congestion notification, the new protocol achieves much higher throughput than TFRC as well as keeps reasonable friendliness to TCP...
When multiple video streams share a wireless network, careful rate allocation is needed to prevent congestion, as well as to balance the video qualities among the competing streams. In this paper, we present a distributed media-aware rate allocation protocol, and evaluate its performance for streaming of high-definition video over 802.11-based wireless home networks. Our optimization framework accommodates...
The explosive demands of multimedia services have been grown up to support delay-sensitive applications, e.g., VoIP and streaming using codec. When a mobile node (MN) moves across different types of networks, the codec should be effectively adapted according to the significant change of network condition, i.e., throughput and delay. Therefore, in this paper, we propose a codec adaptation for vertical...
In this paper our focus is on the performance of two new transport protocols DCCP and SCTP; the emphasis is to determine which protocol can better meet the Quality of Service (QoS) for MPEG4 video over wireless local area network. Based on results obtained in this analysis it is observed that both SCTP and DCCP achieved better throughput than UDP. For video traffic load of 4 Mbps, throughput achieved...
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