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.
Routing schemes for network recovery aim to find connection paths under the scenarios of link or node failures that disrupt end-to-end connectivity. Several recovery schemes consider a proactive search for alternative links (or paths) that can restore the lost connectivity after the failure. However, the effect that the modification of network traffic after the switch over the alternative paths brings...
Performance is a critical aspect for all kinds of security solutions. The Lock-Keeper is a high-level security solution which implements the concept of physical separation. To evaluate and predict the performance of Lock-Keeper, the internal data transfer process has to be analyzed and simulated. As the Lock-Keeper consists of three independent systems, connected through a hardware-based switch, with...
This paper design and realize 3 bit phase digitizing analog-to-digital converter (ADC) and digital-to-analog converter (DAC) for digital radio frequency memory (DRFM). The instantaneous bandwidth (IBW) of the DRFM is enhanced by high sampling rate. Test results show that the highest sampling rate is 3.4 GS/s and the core power dissipation of ADC and DAC is 350 mW and 300 mW, respectively.
The multi-channel switching penalty forces terminals to incur a delay cost when switching from one channel to the other. The delay cost does degrade the performance of multi-channel networks. The channel switching penalty is not avoidable; however, optimization techniques can be implemented to minimize its effects. In this study, we analyze the impact of channel switching penalty on collided and dropped...
Distributed system emulators provide a paramount platform for testing of network protocols and distributed applications in clusters and networks of workstations. However, to allow testers to benefit from these systems, it is necessary an efficient and automatic mapping of hundreds, or even thousands, of virtual nodes to physical hosts-and the mapping of the virtual links between guests to physical...
Oblivious routing can be implemented on simple router hardware, but network performance suffers when routes become congested. Adaptive routing attempts to avoid hot spots by re-routing flows, but requires more complex hardware to determine and configure new routing paths. We propose onchip bandwidth-adaptive networks to mitigate the performance problems of oblivious routing and the complexity issues...
One of the expectations of service overlay networks is to improve routing quality of end-to-end communications. To do this, a new source routing method is proposed. The new method improves communication quality by switching paths according to the information of available resources of the lower network layer. End-to-end bandwidth, round trip time, and hop count are measured by Inline TCP measurement,...
Providing a seamless handoff and quality of service (QoS) guarantees is one of the key issues in real-time services. Several IPv6 mobility management schemes have been proposed and can provide uninterrupted service. However, these schemes either have synchronization issues or introduce signaling overhead and high packet loss rate. This paper presents a scheme that reduces the handoff latency based...
The convergence of different types of networks into a common data center infrastructure poses a superset challenge on the part of the underlying component technology. IP networks are feature-rich, storage networks are lossless with controlled topologies, and transaction networks are low-latency with low jitter, parallel multicast. A successful converged enhanced Ethernet (CEE) switch should pass the...
The key problem in a parallel system is how to distribute the work load to the components of the system in order to get optimal resource utilization, maximize throughput, and minimize response time. The sliding-window (SW) switch is a highly parallel architecture that uses an array of memory-modules to store and process data packets in high speed-networks and Internets. In this paper, we study two...
In this paper, we propose an architecture for load balancing, which contains an adaptive packet scheduler with a bursty traffic splitting algorithm. The scheduler has one classifier which classifies the flows into aggressive and normal flow. Aggressive flows are treated as high priority flows. Based on the buffer occupancy threshold, a trigger handler checks for load un-balance of the network and...
We introduce variable-bandwidth servers (VBS) for scheduling and executing processes under programmable temporal isolation. A VBS is an extension of a constant-bandwidth server where throughput and latency of process execution can not only be controlled to remain constant across different competing workloads but also to vary in time as long as the resulting bandwidth stays below a given bandwidth...
Delay-based TCP variants continue to attract a large amount of attention in the networking community. Potentially, they offer the possibility to efficiently use network resources while at the same time achieving low queueing delay and virtually zero packet loss. One major impediment to the deployment of delay-based TCP variants is their inability to coexist fairly with standard loss-based TCP. In...
A novel compact planar inverted-F antenna (PIFA) with reconfigurable feedings for GSM/PCS/DCS applications is proposed in this paper. The U-shaped PIFA with only one branch is folded into 3 planes is designed to reduce the dimensions. The antenna occupies a relatively small volume of 50*7*7 mm3. Two feeds can be switched to achieve two different matching states, and GSM/PCS/DCS bands can be covered...
This paper proposes a fast fault recovery method for the wide area Ethernet. To achieve fast recovery, a pre-established forwarding table is introduced. The pre-established table is looked up when a fault occurs, and frames are forwarded without frame loss. Ethernet lacks of fault recovery features required in Wide Area Network (WAN) since it is originated as Local Area Network (LAN) technology. Protection...
In this paper, we describe the synthesis of robust and non-fragile Hinfin state feedback rate-based congestion controllers for the ATM network system with affine parameter uncertainties and round trip delay, as well as static state feedback congestion controller with polytopic uncertainty. For practical congestion control design, the round trip delay commonly appears on transmission line and it is...
In real applications there are different communication needs among the cores. When NoCs are the means to interconnect the cores, the use of some techniques to optimize the communication are indispensable. From the performance point of view, large buffer sizes ensure performance during different applications execution, but unfortunately, these same buffers are the main responsible for the router total...
A traffic engineered label switched path (TE-LSP) is usually deployed on an optimally computed path. In complex network scenarios, or when external nodes like path computation elements (PCEs) are solicited in a distributed manner, the already resource hungry task of optimal path computation could take a considerable amount of time during which network resources may fluctuate. This could result in...
Traditionally, service providers have been adding Mobile Switching Centers (MSCs) in their wireless networks whenever they run out of capacity. In an analysis of a large metropolitan network, we observed something seemingly counter-intuitive: additional MSCs do not necessarily add call capacity and they can sometimes even cause decreased network capacity. The apparent anomaly can be intuitively explained...
Now the QoS demand is ordinary in network device. This paper introduces some key technology to implementation a QoS scheme in embedded system. Base on the DiffServ, this paper discusses the multilayer data stream module in detail.
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.