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Since the early days of Quality of Experience (QoE) research, relationships to Quality of Service (QoS) and corresponding QoE-QoS models have been of great interest to the research community. However, the manifold quality transformations throughout the communication stack, together with accessibility issues of QoS parameters inside networks, hamper availability, applicability and generality of such...
Congestion control is vital in the streaming of a video sequence or clip, as network traffic varies unpredictably requiring constant adjustment of the transmission rate. Standard TCP-Friendly Rate Control (TFRC) wastes bandwidth and may react to congestion only when packet loss has already occurred. This paper presents a unicast transport protocol named RRB-SIMD for video streaming over the Internet,...
The technology of flow-based QoS control on wireless LANs is receiving a lot of attention. There are several QoS technologies that can provide bandwidth guarantees by using TCP congestion control (QoS-TCP) and MAC control (QoS-MAC). Unfortunately, since QoS-TCP runs on the end terminal, it is possible that QoS-TCP will attempt to guarantee bandwidth without the permission of the network administrator...
In the present heterogeneous wired networks, reliability priority consideration is important. Quality of Service (QoS) varies according to congestion in the network and it can be avoided by different TCP Agents using congestion control algorithms. Previously, researches had only analyzed TCP agents, we extend their work to practical simulation for the multisource scenario to compare performance evaluation...
Requirements and constraints of the communication services required by autonomous systems raise new challenges to the traditional transport protocol layer. Indeed, classical transport protocols (i.e. TCP and UDP) were well dimensioned for the standard distributed applications operating over best-effort network services. Today, more sophisticated transport protocols are required in order to self-configure...
Mobile video service is emerging as an attractive service, on basis of the successful IPTV commercialization and recent incredible smart-phone penetration to the mobile market. However, the lack of QoE/QoS monitoring mechanism will be a major obstacle for wider acceptance. In this paper, we present a QoE/QoS monitoring scheme, extending OMA-DM protocol and streaming QoE parameters. The design and...
With the development of the wireless communications technology and the multimedia technology, the wireless internet multimedia transport of real-time becomes an important applications field. We will meet a problem that the distinguish of the status of package loss is not very good which will affect the QoS when we transport multimedia data in wireless internet. Based on this problem the article comes...
Streaming media application has attracted more and more attention nowadays. However, how to improve the quality of service (QoS) for streaming media application is still a challenging issue. The emerging transport protocol - Mul-TCP Friendly Rate Control (MulTFRC), which gives different priorities to data flows, could be used in streaming applications or similar use cases. On our test bed, some streaming...
In this paper we describe a new service that allows multimedia sharing between UPnP terminals connected to remote networks. The service grants the confidentiality of users' contents since they are still stored in the home network. Our approach uses IP Multimedia Subsystem (IMS) framework to establish a secure HTTP session between remote devices. A new Remote Access Application Server is deployed in...
High quality and sustained multi media experience is expected to be a major feature of the Future Mobile Internet (FMI). Currently deployed novel mobile network technologies such as LTE (Long Term Evolution) make use of the Internet and its best-effort TCP/IP protocol stack to enable applications. The orientation towards TCP/IP is logical due to the success of the Internet. However, TCP/IP still provides...
In order to effectively monitor the application of the network performance and service quality, rapidly response users' needs and complaints, telecom operators find that the demands for service quality are in an urgent case. According to the requirement analysis on quality monitoring for streaming media service, together with the characteristics of stream media transport protocol, this paper introduced...
Development of network monitoring tools for realtime rich-media (RTRM) applications remains a challenge for both academic and industrial researchers as the complexity of the computational processing varies dynamically. We propose a novel, flexible and cost effective technique which can be implemented in ordinary network environment to monitor QoS parameters such as packet-delay, packet-loss, packet...
The congestion control mechanism TFRC, which is widely used in current real-time streaming media, is analyzed in this paper. A proposal aiming at the requirement for smoothly change of transmit rate as well as short delay and jitter of real-time streaming media has been made that adjusting the transmit rate of the sender to the change of single trip delay jitter. In the meanwhile, a dynamic adaptive...
To prevent decoding failure of MPEG-based applications caused by error propagation, the present study modifies multi-streaming mechanism of SCTP protocol and proposes a transmission control approach which can adjust transmission policy dynamically according to the quality of service requirement of individual frame. The simulation results confirmed that the proposed scheme can improve the performance...
Quality of Service (QoS) is still one of the major challenges for emerging services based on the Real-Time Transport Protocol (RTP) to deliver multimedia content. In the context of the Internet Protocol Television (IPTV) services, the synchronization of multimedia components plays an important role. In order to synchronize audio and video components of multimedia content, RTP timestamps have to be...
Multimedia services have gained an increasing interest of industry and the research community over the last decade. In this paper we present an RTP-based platform for video streaming evaluation in simulated environments. We have developed a new NS-2 module providing an accurate RTP and RTCP implementation (following strictly the RFC 3550 specification) and we propose to combine it with several tools...
Video distributions using TCP (called "TCP streaming") like YouTube have been increased rapidly with the improvement on the speed and capacity of the Internet. Thus, it is an important technical issue to guarantee QoS (quality of service) suitable for TCP streaming. However, it is difficult for the existing IP network to guarantee QoS of the TCP streaming. So far, in order to achieve the...
In this paper, we propose a network performance monitoring method which can measure delay of each network using the RTCP(Real-time Transport Control Protocol) timestamp fields to detect a trouble section in interworking environment. According to the increment of real-time multimedia service provision, network performance monitoring method is necessarily needed for QoS management of real-time services...
In this letter, we develop a general delivery system for streaming using various coding standards over DiffServ (DS) networks. In the delivery system, the coder at the application layer pre-marks the compressed data according to their importance in terms of the current configuration and characteristics of the coder. Then the system maps these pre-marks to a fixed number of source marks at the real-time...
Real-time multimedia applications are time sensitive and require extra resources from the network, e.g. large bandwidth and big memory. However, wireless sensor networks (WSNs) suffer from limited resources such as computational, storage, and bandwidth capabilities. Therefore, sending real-time multimedia applications over WSNs can be very challenging. For this reason, we propose an adaptive multi-flows...
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