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A large variety of content sharing applications rely, at least partially, on gossip-based dissemination protocols. However, these protocols are subject to various types of faults, among which selfish behaviours performed by nodes that benefit from the system without contributing their fair share to it. Accountability mechanisms (e.g., PeerReview, AVMs, FullReview), which require that nodes log their...
In our previous work, we had proposed a distributed storage system which aims to optimize the locations of data blocks on the basis of their access frequency. In order to relocate data blocks at an appropriate node, each node should collect fresh information about storage utilization of other nodes. However, frequent information exchange might become the cause of network congestion. In this paper,...
The growing data traffic demand is forcing network operators to deploy more base stations, culminating in dense heterogeneous networks that require a high-connectivity backhaul. This scenario imposes significant challenges for current and future cellular networks, and Software Defined Networking (SDN) has been pointed as an enabling technology to overcome existing limitations. This paper shows how...
This paper presents a mechanism to use Traffic Analysis (TA) for identifying sources of tunneled video streaming traffic. The key idea is to probe encrypted and tunneled video streaming traffic at a client-side firewall so that the firewall can identify the traffic source using traffic analysis, and block or throttle traffic from that particular source. The key contribution in this paper is to evaluate...
Over the past few years, adaptive bitrate streaming protocols, such as DASH, have risen to enhance the End-Users' experience towards video consumption over the Internet. Current methods perform a smoother playback (i.e., fewer re-buffering states) trading off with quality fluctuations due to the client-server link state. The proposed work goes a step further and introduces an innovative lightweight...
This research work addresses issues of video trans-smission and presented a model that is used for transmission of video with the help of UDP Lite protocol. Before transmission of video, we are compressing the video by bitwise operator. This model is work for MJPEG format. The basic idea of this proposed model is that firstly we select the file which is in the form of video. Generally, in the computer...
According to the actual need of the smart home video surveillance, a wireless video surveillance system based on Cortex M3 system components was designed in this paper. STM32F103 was selected by the system to be main controller and OV2640 camera was used to a video capture device. Wi-Fi module WM-G-MR-09 based on the chip called Marvell 88W8686 transmit the video. The TCP/UDP protocol of transmit...
Recently, Vehicular Ad Hoc Networks (VANETs) have been providing a number of services for on-road users, including video content retrieval using 3G and 4G networks. However, owing to the highly dynamic network topology of VANETs, such services is highly susceptible to poor performance. In such a real-time scenario, a requesting vehicle may not be able to guarantee the video quality using its own wireless...
TCP is widely used for delay-sensitive applications including video streaming, voice, and instant messaging. Therefore, a performance parameter of interest is the end-to-end delay at the application level. In the past, much research was performed in the optimization of TCP's throughput. Besides throughput, delay is an important issue in todays networks. However, it was often disregarded. Amongst others,...
End-users in online video services are sensitive to the overall quality of the video at screen, but also, and more importantly, to other factors, including the latency between the video generation and the playback for live videos. If the improvement of the quality of the perceived video has been well investigated by the multimedia community, the impact of delay, latency, and re-buffering has not received...
Multimedia streaming between smart devices has come into general use in Wi-Fi networks, for example, streaming a video content in mobile phone to smart TV. However, drastic and frequent changes of link quality caused by wireless channel characteristics such as multipath fading and Doppler effect leads the network throughput unstable. In order to support seamless play even in unstable wireless link,...
With the development of science and technology and the improvement of living standards, people pay more and more attention to security issues, the mobile video surveillance has become an important way of monitoring based on 4G network construction, the popularity of the new generation mobile intelligent terminal and the development of video coding and decoding technology. This paper mainly introduces...
In this paper, we present a cooperative video multicast protocol for densely deployed small cells. We assume that the small cell Base Stations (BS) have overlapping coverages and they are allowed to have interfering transmissions. The proposed cooperative multicast protocol realizes a two-hop transmission system where each hop has its own time slot. In the first hop, the small cell base stations simultaneously...
Multimedia streaming between smart devices has come into general use in Wi-Fi networks, for example, streaming a video content in mobile phone to smart TV. However, drastic and frequent changes of link quality caused by wireless channel characteristics such as multipath fading and doppler effect leads the network throughput unstable. In order to support seamless play even in unstable wireless link,...
The demonstrated system is an online video streaming service using QUIC protocol as transport. Video buffer status information is gathered at the client side and it is transferred to the video content server via the object priority assignment method of QUIC. Our proposal is to utilize the priority information for congestion control (CC) influence as well. In our realization, the server extracts the...
The popularity of online services has grown exponentially, spurring great interest in improving server hardware and software. However, conducting research on servers has traditionally been challenging due to the complexity of setting up representative server configurations and measuring their performance. Recent work has eased the effort of benchmarking servers by making benchmarking software and...
HTTP Adaptive Streaming (HAS) is the de facto standard for over-the-top video streaming. In HAS, video content is encoded at multiple quality levels and temporally divided into multiple segments. The client can select the quality level for every video segment, allowing smoother playback and a better Quality of Experience (QoE). Although results are promising, current solutions often suffer from high...
In perspective, the effectiveness and attractiveness of multimedia communications rely both on such disruptive services as Web Real-Time Communication (WebRTC), and on such reliable mobile infrastructures as Long Term Evolution (LTE). WebRTC is the innovative protocol letting HTML5 compliant browsers to communicate in real-time using a peer-to-peer architecture. LTE on the other hand, is the current...
Mobile nodes in a robust and challenging network scenario of Mobile Adhoc Network (MANET) are autonomous with self-configurable capability due to high frequency of topology change and unpredictable rearrangement of the network components during data transmission. Due to ease of set up , the vigorous networking system in MANET is very successful in conditions where it is difficult to create infrastructure...
Software Defined Networking (SDN) is a promising technology for future internet applications through decoupling the data and control planes of computer networks. Enabling the development of application specific routing algorithms, the separation fosters the performance of internet applications. On the other hand, Application Layer Traffic Optimization (ALTO) provides network related information such...
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