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This paper will discuss about transmission of multimedia content in limited capacity network (up to 5 Mbps), especially to study about the impact of background traffic towards multimedia content delivery quality in a limited capacity network. Observation methods proposed in the study include measurement of limited capacity network, background traffic modeling, and simulating the network to observe...
Wireless Multimedia Sensor Networks (WMSNS) are composed of a number of sensors which usually the most important data generated by them are video data. According to massive amounts of data, congestion control is essential for quality preservation of the video data. Quality of video data depends on low latency and high reliability. In this paper, an approach for congestion control is proposed. In the...
In this study, the effect of pure synchronous and asynchronous transmission delay was examined in an interactive videotelephony setting. It was found that the conversational quality rated by participants of the study was clearly dependant on the tested conditions. This outcome can to some extend be ascribed to the used task which facilitated the usage of the visual channel for social interaction....
Delay has been found as one of the most crucial factors determining the Quality of Experience (QoE) in synchronous video-mediated communication. The effect has been extensively studied for dyadic conversations and recently the study of small group communications has become the focus of the research community. Contrary to dyads, in which the delay is symmetrically perceived, this is not the case for...
In IP multimedia subsystem (IMS), in order to have a multimedia service first a session should be established. The signaling part is done by the SIP protocol-the most important protocol used in IMS network. Excessive signaling during the session setup mechanism leads to an undesirable delay in session establishment and also the final response of the other subscriber. This matter is considered important...
With rapid development of microelectronics and low-cost cost multimedia hardware, Wireless Sensor Networks (WSNs) have started to evolve into Wireless Multimedia Sensor Networks (WMSNs), where the emphasis is given on acquisition, processing and transmission of multimedia content through WSN. While the idea of multimedia sensor networks has been existing for some time, very little research is performed...
Real-time stream mining such as surveillance and personal health monitoring is computation-intensive and prohibitive for mobile devices due to the hardware/computation constraints. To satisfy the growing demand for stream mining in mobile networks, we propose to employ a cloud-based stream mining system in which the mobile devices send via wireless links unclassified media streams to the cloud for...
In recent years, network communication has been a necessary part in daily life. However, there is a lake of emergency call or emergency process in current network communication environment. In order to overcome such situation, 3GPP proposes emergency communication system in Next Generation Networks, which is a part of service in IP Multimedia Subsystem. The queuing model is used to achieve the performance...
The cloud-based multimedia applications have been increasingly adopted in recent years. The key challenge for the application providers is how to optimally reconfigure resources to cope with the time-varying workload. In this paper, we study the optimal resource reconfiguration for cloud-based multimedia applications to minimize the average round-trip-time (RTT). Specifically, we propose the optimal...
High Speed Downlink Packet Access (HSDPA) is being increasingly deployed to enhance UMTS Radio Access Networks. Scheduling of Node B (base station) buffered user data for transmission over a shared radio channel is a key HSDPA functionality which enables queue management techniques to be utilized to improve Quality of Service (QoS) for mixed ‘multimedia’ services. In this paper, we study a control...
The Internet Protocol Multimedia Subsystem (IMS) has been recognized as a common signaling architecture for providing next generation multimedia services. In order to enhance perceived service quality regardless of access network and device, IMS supports Quality of Service (QoS) negotiation and signaling. The IMS procedures used for that purpose are based on Session Initiation Protocol (SIP). Therefore,...
SOCs designed for embedded systems are now widely used on embedded multimedia devices. Processors in these devices may need capabilities to support some compound computations, and the most important of all is multiply and accumulate (MAC) operation. Thus DSP processors or special ALUs are designed to accelerate these computations. Besides the computation issue, how to improve the reliability, stability...
High Speed Downlink Packet Access (HSDPA) is being increasingly deployed to enhance UMTS Radio Access Networks. Scheduling of Node B (base station) buffered user data for transmission over a shared radio channel is a key HSDPA functionality which enables queue management techniques to be utilized to improve Quality of Service (QoS) for mixed ‘multimedia’ services. In this paper, we study a control...
The Wireless Multimedia Sensor Networks (WMSN) are confronted with two basic constraints that are the strong constraint of the energy consumption, and the strong constraint of the traffic performance (Delay, Throughput, etc.). To try to satisfy these two constraints, the IEEE 802.11e Enhanced Distributed Channel Access (EDCA) has been used at the MAC layer in the WMSN. The EDCA access method maintains...
There will be a great of Heterogeneous networks in Next Generation Network. Mobile Satellite system (MSS), great supplement of terrestrial network, provide large scale network coverage and is able to support IP multimedia services. We propose a SIP-based soft handoff scheme for integrated architecture of MSS and UMTS, as well as add satellite access gateway (SAG) in satellite station and terrestrial...
The wireless mobile network is a dynamic environment. The characteristics of the wireless mobile communication include limited channel bandwidth, high BER, dynamic change over time, unstable channel quality, mobile node, competition of multiple users to share the channel, and the users' wireless signal interference from other nodes of the shared channel. These characteristics of wireless communication...
3GPP defines the Policy and Charging Control (PCC) architecture to enforce network resources dynamically and to manage charging functions. In this paper, we present the design and implementation of Group Accounting System (GAS). GAS is based on the PCC architecture and is integrated with the IP Multimedia Subsystem (IMS) of Chunghwa Telecom. GAS allows a group of people to share one or more accounts...
Wireless multimedia communications such as Video Transfer over Radio Interface (VToRI) is widely acknowledged as one of the key, emerging applications for wireless networks. They are becoming popular and are major revenue earners for wireless communication providers. As a service with real-time requirement, VToRI requires a low delivering delay under the constraint of bandwidth. Larger bandwidth and...
Multimedia sensor network (MSN) has been deployed in many fields owing to its reliability, flexibility and availability of multimedia data. Correspondingly more challenges draw into the QoS guarantee research. In this paper, we establish a comprehensive performance analytical framework for MSN considering both the traffic self-similarity and stochastic service curve of MSN with S-MAC protocol based...
Long-term evolution (LTE) represents a promising technique for ubiquitous multimedia communication because of its significant enhancement to the data transmission rate. However, the hard hand-off (HO) procedure standardized in LTE is a menace to multimedia quality of service (QoS), due to the service interruption introduced by the procedure. Thus, one major challenge of such a system is to design...
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