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One of the most interesting applications of single — sided Quality of Experience (QoE) metrics is their use in improving the quality of the service, as perceived by the user. This can be done either at the application level — by for example changing the encoding in use, or the level of error correction applied — or at the network level, for instance by choosing a different DiffServ marking strategy,...
This paper describes the protocol of the in-vehicle network. Nowadays, many cars adopt in-vehicle network for lightweight and maintenance. CAN is popular in-vehicle network for control data, and MOST is network for multimedia data. But CAN and MOST does not integrate and work independently. This paper suggests integration of MOST and CAN. The two networks have different characteristics such as data...
3GPP has standardized Multimedia Broadcast Multicast Service (MBMS) to deliver multimedia services with high bandwidth efficiency through IP multicasting technology. In this paper, we present the implementation details of an MBMS test-bed with the standardized Policy and Charging Control (PCC) to realize the dynamic charging plan for multicast services. Specifically, we illustrate the detailed message...
Multicast is one of the key technologies for supporting the multimedia networks services. Based on the concept of the distributed algorithm theory, this paper discusses a multimedia communication model and its corresponding data structure, and also simulates RPM algorithm by using forwarding table, the time line and data packet cache to discuss the algorithm QoS solution.
Nowadays, real time traffic over wireless networks is increasing sharply. In addition, network scale is larger due to new facilities as offered by wireless mesh networks. However, the differences between (1) the infrastructure capacities, (2) the end users devices technologies, (3) the number of users, and (4) the number of real time applications are implying the need of more dynamic quality of service...
This paper presents an enhanced version of a proposed extension of the RTP/RTCP standard protocols to acquire Inter-Destination Multimedia Synchronization (IDMS) in one-way distributed applications. Several dynamic policies for selecting the master reference play out point to synchronize are introduced and their suitability is analyzed, for specific network conditions and application requirements,...
This paper proposed a method of allocating additional TXOP duration to replenish the bandwidth used during the retransmission of frames at link layer in audio-video transmission by IEEE 802.11e HCCA. In the proposed scheme, the HC monitors the number of retransmission at link layer and utilize the surplus bandwidth to allocate additional TXOP duration on the basis of number of retransmission performed...
PR-SCTP is an extension to SCTP for partial reliability that enables a content sensitive transport service where the reliability of messages can be individually controlled. In previous work, PR-SCTP has been applied for prioritization of messages and trading of reliability against timeliness for applications such as real time video streaming, IPTV transmission, SIP signaling, and syslog. As compared...
A Selective Dropping Congestion Control (SDCC) algorithm is proposed in this work, for wireless multimedia sensor networks based on scalable multimedia encoding. SDCC, which has been designed by means of linear discrete time control theory arguments, can be applied in a fully distributed way. It periodically evaluates at each node the amount of data to drop, in order to control the level of the transmission...
Based on the diffrent features between the streaming service and web service, the authors proposed a novel Flow Cycle Caching Algorithm, and prompted 3 new metrics, First Demand Without Delay Rate, Jump Demand Without Delay Rate and Caching Benefit Rate, which fit for streaming media server inherent characteristics of performance standards. Through comparing various caching algorithms under these...
In wireless networks, the multicast QoS routing is a key technique to increase bandwidth utilization, but the multicast routing is typically complicated and difficult because it belongs to the NP-complete problem. The main goal of a delay-bounded wireless multicast algorithm is to determine the optimal multicast tree that has the least cost while satisfying the delay-bounded requirement. However,...
This paper proposes a novel architecture that integrates Media Independent Handover (MIH) 802.21 framework and IP Multimedia Subsystem (IMS) functionalities in order to support multimedia services across intertechnology Radio Access Networks (RANs) in a secure and seamless manner. MIH framework is responsible for deciding and triggering a handoff based on physical, network and application layer statistics...
We propose a solution to mitigate the performance degradation and corresponding Quality of Experience (QoE) reduction caused by packet reordering for multimedia applications which utilise unreliable transport protocols like the Datagram Congestion Control Protocol (DCCP). We analytically derive the optimum buffer size based on the applications data rate and the maximum delay tolerated by the multimedia...
Low Earth Orbit (LEO) satellite networks are expected to provide a variety of multimedia applications. In order to satisfy different QoS requirements and optimize utilization of network resources, a novel traffic classification routing algorithm (TCR) is proposed. The key technique of TCR is investigating the traffic classification link-cost metrics (TCM) for different traffic classes, which selects...
Wireless sensor networks pose strict bandwidth and power constraints. In multimedia Sensor Networks classical rate distortion function may not be directly applied since timely delivery of multimedia content in sensor network may necessitate consideration of energy consumption and transmission rate in the process. Both these factors should be incorporated in classical R-D function to achieve best operational...
One of the fundamental requirements for IEEE 802.16/WiMAX, to become a key technology for high-speed multimedia service delivery, is QoS (Quality of Service) differentiation. Although different types of QoS classes have been defined by the IEEE 802.16 standard, the scheduling architecture is left to be vendor specific. In this paper, new modifications are purposed, and a detailed simulation study...
A hybrid radix-4/-8 multiplier is proposed for portable multimedia applications that demand high speed and low energy operation. Depending on the input pattern, the multiplier operates in the radix-8 mode in 56% of the input cases for low power, but reverts to the radix-4 mode in 44% of the slower input cases for high speed. For this, a mode detection circuit determines the mode signal from the input...
In this paper, we propose a content-aware congestion control for multimedia streaming over TCP/IP networks. Unlike existing congestion control schemes over the Internet that adapt a user's sending rate merely to the network condition, our solution adapts the sending rate to both the network condition and the application characteristics by explicitly considering the distortion impacts, delay deadlines,...
This paper evaluates the performance of FASTAR code in Multimedia Broadcast Multicast Service (MBMS) System. It is demonstrated that FASTAR code, which is optimised for erasure channel through its overhead minimising degree distribution, can improve the system performance compared to the conventional systematic Raptor code. The system is simulated under the Evolved UMTS Terrestrial Radio Access (E-UTRA)...
The transmission of video and imaging data in Wireless Multimedia Sensor Networks (WMSN) requires both energy efficiency and QoS assurance, in order to ensure the efficient use of sensor resources, an Ant Colony Optimization based QoS routing model is proposed to improve the routing protocol of WMSN. Firstly, a routing model for WMSN QoS was presented and then a routing algorithm ACOWMSN was brought...
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