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The Long Term Evolution (LTE) defined by 3rdGeneration Partnership Project (3GPP) is a dominant cellular wireless technology which is currently being commercialized worldwide. In this paper, we evaluate the performance of self-healing schemes for LTE Evolved Packet Core (EPC) network elements failures in different architectural configurations. We also analyze message overhead and bandwidth requirements...
Over 40 research projects are currently on-going worldwide aimed at designing the new architecture of the Internet. One of these projects — System IIP led in Poland — covers a wide spectrum of issues including network technologies, architectures, virtualization aspects, and applications. In this paper, we focus on implementation issues of network resource provisioning in System IIP, as well as on...
How to provide quality of service (QoS) guarantees in routing and switching systems has become one of the key research topics in the areas of routing and switching technologies. Differentiated services architecture (DiffServ) is known as a promising way for supporting QoS in a high-speed backbone network scenario. However, the measurement indexes for realtime multimedia traffic, which plays very important...
Vehicular network is different from wired network due to its network environment changes rapidly. The connection lifetime between vehicles is usually short because vehicles move in high speeds. Hence, deploy peer-to-peer (p2p) applications over vehicular network is a challenging research issue. There are many problems confronted in p2p file sharing, e.g. how to search files effectively, how to share...
Deploying decode-and-forward relay nodes is a promising solution for LTE-advanced networks in order to meet the growing data rate demand and the challenging requirements for coverage extension. However, relay selection scheme plays a crucial role in enhancing the benefit of this technology. In this paper, we have proposed a new relay selection scheme which achieves a more balanced load in the network,...
As the dominant Internet application, peer-to-peer (P2P) file sharing systems account for the major portion of Internet traffic, posing significant burden on ISPs. Many ISPs have attempted to discriminate against P2P traffic, making it important to alleviate such severe conflict. In this paper, we propose a novel architecture called iDTT that aims to use the underutilized off-peak time network capacity...
Smart Grid (SG) is characterized by two-way flow of electricity and information and is capable of monitoring everything from power plants and customer preference to individual appliances. In this paper, we focus on applying 3GPP LTE release 8 technology to build a high-reliable and low-latency Distribution Automation (DA) network. Based on the documents released by Nation Institute of Standard and...
A streak-mode optical sensor suitable for the accurate observation of nanosecond luminous phenomena is presented. The imager is fabricated in a standard 0.35 µm SiGe BiCMOS technology. It reaches a total acquisition rate of 512 GS/s and a temporal resolution of 490 ps at λ = 400 nm. The sensor has been successfully employed to acquire the fluorescence profile of a stilbene sample, demonstrating its...
This paper adopts a time-slotted and synchronous output-queued (SS-OQ) switch, which avoids memory speedup through the use of dedicated lines connecting inputs to outputs, to show that the performance of an S-OQ switch approaches that of an ideal OQ switch, or asynchronous OQ (A-OQ) switch. An A-OQ switch forwards packets to their destined outputs at arrival but it is costly to implement as immediate...
The Resilient Packet Ring (RPR), defined under IEEE 802.17, has been proposed as a high-speed backbone technology for metropolitan area networks. RPR is introduced to mitigate the underutilization and unfairness problems associated with the current technologies, SONET and Ethernet, respectively. The key performance objectives of RPR are to achieve high bandwidth utilization, optimum spatial reuse...
The intention of this work is to realize a power and area-efficient 50MS/S ΔΣ modulator with an OSR of only 10, an effective linearization without DEM, and a very low power ELD compensation. This is achieved by using a digital DAC error estimation and correction, and a compensation for finite gain-bandwidth (FGBW) in all feedback amplifiers. A multi-bit 3rd-order, mixed feedforward-feedback compensation...
Multi core architectures that are built to reap performance and energy efficiency benefits from the parallel execution of applications often employ runtime adaptive techniques in order to achieve, among others, load balancing, dynamic thermal management, and to enhance the reliability of a system. Typically, such runtime adaptation in the system level requires the ability to quickly and consistently...
Enabling the coexistence of non-UPnP Devices in UPnP QoS Architecture is an important issue that might have a major impact on the deployment and usability of UPnP in future home networks. The work presented here shows potential issues of placing a non-UPnP Device in the network managed by UPnP QoS. We address this issue by extensions to UPnP QoS Architecture that can prevent non-UPnP Devices from...
The Delay/Disruption Tolerant Networking (DTN) architecture has been successful in addressing communication issues such as disruption, variable delay, and network partitioning. DTN uses intermittently available links to communicate opportunistically regardless of delivery delay. In the literature, much work has been done mainly to improve the rate of message delivery and routing algorithms. However,...
A lab trial validating the implemented GMPLS control plane for MPLS-TP in the ADRENALINE testbed is presented. We experimentally compare the establishment of bidirectional LSPs using either source or PCE-based path computations.
Doing research on mobile ad hoc network (MANET) security involves several constraints, some of which are wireless environment's attributes, such as bandwidth and delay, and the correctness of network topology. Testing and evaluating using real wireless devices are costly and somehow impractical, so many tools have been developed in order to create media by which researchers can deeply investigate...
Nowadays, users consume a lot of functionality in their home coming from a service provider located in the Internet. While the home network is typically shielded off as much as possible from the `outside world', the supplied services could be greatly extended if it was possible to use local information. In this article, an extended service is presented that integrates the user's multimedia content,...
The large gap between processing and I/O speed makes the storage infrastructure of a cluster a great bottleneck for UPC applications. Parallel File Systems propose a solution to this issue by distributing data onto several servers, dividing the load of I/O operations and increasing the available bandwidth. However, most parallel file systems use a fixed number of I/O servers defined during initialization...
More and more complex application cases bring much heavy bandwidth loading problem to SoC architecture. To design a high performance SoC system which supports large amount and high speed data processing capability, an efficient, systematic, and quick performance evaluation of SoC architecture becomes the base requirement for chip success. A novel performance evaluation method based on memory access...
In this paper, a distributed Dynamic Bandwidth Allocation (D-DBA) scheduling mechanism for star-ring protection architecture is proposed in Ethernet Passive Optical Networks (EPONs). The D-DBA mechanism can effectively resolve the idle period problem and reduce overload of OLT in traditional DBA mechanism. We perform exhaustive simulation experiments to study the performance and validate the usefulness...
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