The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Since commercialization of the Internet in mid-1990, human culture has changed dramatically due to booming of innovative online services. To cope with demands of network service providers to effectively and efficiently deliver contents and services to their clients, content distribution network technologies have been developed. These technologies have been optimized to transfer data from servers to...
Gathering information efficiently from a, possibly fragmented, sensor network presents a serious problem in disaster recovery applications. Unless a transmission control mechanism exists, a sink can be flooded with information sent by sensors, or sensor transmissions may be lost on their way to the sink. Consequently, there is a necessity for a reliable protocol that automatically and speedily adapts...
We address the future access service and system requirements in Japan. We must ensure that sufficient bandwidth is available for future mobile and IP-TV services. We propose an optical access platform to meet these different requirements.
Mobile networks usage rapidly increased over the years, with great consequences in terms of performance requirements. In this paper, we propose mechanisms to use Information-Centric Networking to perform load balancing in mobile networks, providing content delivery over multiple radio technologies at the same time and thus efficiently using resources and improving the overall performance of content...
Downlink throughput is the most widely used and accepted Quality of Service (QoS) related feature within the networking community, specially in the operational field. Current quality monitoring and reporting systems as well as quality benchmarking campaigns use the Average Downlink Throughput (ADT) as metric to assess the performance of the network. For example, flow-based monitoring systems normally...
Recent advances in high-speed mobile networks have revealed new bottlenecks in ubiquitous TCP protocol deployed in the Internet. In addition to differentiating non-congestive loss from congestive loss, our experiments revealed two significant performance bottlenecks during loss recovery phase: flow control bottleneck and application stall, resulting in degradation in QoS performance. To tackle these...
Existing cooperative file downloading schemes have some blindness on the selection of collaborative nodes. In this paper we present a cooperative file downloading scheme with genetic algorithm to resolve the collaborative nodes selection problem, especially in the case that we cannot have a prior knowledge about the data rate and position of the mobile nodes. A simple and efficient extended on-demand...
Mobile data traffic is increasing rapidly and wireless spectrum is becoming a more and more scarce resource. This makes it highly important to operate the mobile network efficiently. In this paper we are proposing a novel lightweight measurement technique that can be used as a basis for advanced resource optimization algorithms to be run on mobile phones. Our main idea leverages an original packet...
TWDM PON is a promising candidate to become the backhauling infrastructure of Fixed Mobile Converged (FMC) access-aggregation networks. One of the main features of a FMC network is that different types of traffic (that support, e.g., fixed and mobile network services) are transported over the same infrastructure, and the coexistence of different traffic types poses complex challenges in terms of capacity...
Smart phones are ubiquitous nowadays and have taken over the bulk data transfers in mobile networks. The next generation phones are even more powerful to handle voice, video and data catering real time multimedia experience. Unfortunately, the increase in service provider capacity has not kept up with the user demand for more bandwidth. It is becoming very expensive for service providers to cater...
Broadcasting is the primary procedure employed in Mobile ad hoc network for different kinds of functions like sending data and route discovery. Simple flooding is the direct method for broadcasting which can degrade the network performance. To resolve the broadcast storm issue which potentially leads to contention, collision and replicated messages, recently a new probabilistic approach has been proposed...
For multimedia streaming in mobile environments, video bitrate should be carefully determined and different channel quality and pricing in heterogeneous wireless networks (e.g., cellular and WiFi networks) need to be considered. In this work, we propose a new bitrate adaptation (BA) technique called mobility-aware dynamic adaptive streaming over HTTP (MDASH), in which a cellular data usage is minimized...
Nowadays the spectrum regulations landscape is changing towards more flexible spectrum management schemes, such trends are expected to make additional spectrum resources available and lowers the spectrum access hurdles. In this paper, different spectrum aggregation scenarios have been compared focusing on the tradeoff between the total cost of ownership and the targeted QoS under different market...
The rapid traffic growth fueled by mobile devices spread and high speed network access calls for substantial innovation at network layer. The content-centric nature of Internet usage highlights the limitations of the host-centric model in coping with dynamic content-to-location binding, mobility, multicast, multi-homing, etc. If transmission capacity speedups in the backhaul may hide inefficiencies...
The conventional slow start algorithm doubles the congestion window size per RTT until it detects a packet loss in order to estimate the available bandwidth quickly. But it causes a large number of packet losses. Hybrid Slow Start is proposed to reduce these packet losses. It finds a good point where TCP can exit the slow start phase before packet losses occur. However, the algorithm for finding the...
The cognitive radio sensor networks are essential to reduce the battery energy usage and to maximize the life of the sensor networks. Hence in wireless sensor networks to improve the energy efficiency it is essential to analyze and optimize the power allocation and bandwidth utilization. Therefore the proposed system presents a scheduling heuristic called Power Re-distribution Algorithm (PRA) in which...
The surge of social networking and video streaming on the go has led to the explosion of mobile data traffic. To minimize congestion costs for under-served demand (e.g., Dissatisfied customers, or churn), the cellular service provider is willing to pay WiFi hotspots to serve the demand that exceeds capacity. In the present study, we propose an optimal procurement mechanism with contingent contracts...
Information-Centric Networking (ICN) has a great potential to better support the content distribution over the future Internet. Meanwhile, users with mobile devices will also access ICN, introducing a new challenge to ICN providers to handle such mobile content requests. In this paper, a mobility and popularity-based caching strategy is proposed to increase the cache hit rate through WiFi while people...
Adaptive video streaming is an essential tool for improving the performance of video delivery over mobile networks. By dynamically switching between different bit-rate versions of the same video, adaptive video streaming can compensate for and adapt to the ever-changing network conditions inherent in today's 3G/4G networks. However, existing adaptive streaming algorithms, both academic and commercial...
Data consumption is increasing rapidly in mobile networks. The cost of the network infrastructure is increasing, which leads to an "end of profit" within next few years. Thus, mobile operators require a new technology that allows increasing the network capacity within low network costs. Therefore, using caching is the most evident solution to be used in their backhaul networks. However,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.