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As technology scaling drives the number of processor cores upward, current on-chip routers consume substantial portions of chip area and power budgets. Since existing research has greatly reduced router latency overheads and capitalized on available on-chip bandwidth, power constraints dominate interconnection network design. Recently research has proposed bufferless routers as a means to alleviate...
In this paper, we propose new network simulator architecture to simulate the performance of multi-channel multi-radio mesh network in the NS-2. We add multi-radio abstraction layer to manage multiple radio instances, and we are able to simulate regardless of the number of channels and radios in each node. Most of all, we implement some important procedures for realistic multi-channel multi-radio experiments...
In multihop wireless networks each node is equipped with multiple radio interfaces, and multiple channels are available for communication. One of the major problems in such networks is the capacity reduction due to the interference among multiple simultaneous transmissions. In order to effectively minimize interference, this paper proposes a QoS routing protocol CATR based on channel assignment and...
Current approaches for service discovery in Mobile ad-hoc Networks (MANETs) are optimized for highly dynamic environments. These approaches do not scale in Wireless Mesh Networks (WMNs) which are intended for long-time usage. Service discovery approaches for static wired networks are also not applicable. We present a scalable two-layered approach for service discovery in WMNs where clients communicate...
This paper puts forward a new method of channel monitoring for the optic fiber longitudinal differential protection. It involves following approaches: the differential protections at two ends of line communicate according to designed message frame format; calculate and store the communication channel delay of each message frame; estimate the stability of channel delay according to the criterion inequality,...
This paper investigates the stability characteristics of overlay networks performing switching between multiple virtual paths. A global stability condition for switched-control-systems has been applied to overlay path switching frequency, that can be incorporated into design of better routing protocols for overlay networks. Further, NS-2 based simulations have been carried out on an overlay network...
B-ISDN is expected to support diverse applications ranging from lowest to highest bit rate communications. In this mode, information is transferred in a connection oriented fashion among communicating entities using fixed size packets know as ATM cell. The Batcher-Banyan combinational switches are one of high speed space division switches. But it finds difficulties in routing two cells with same destination...
The combination of multi-radio nodes in conjunction with a suitably structured mesh architecture has the potential to solve some of the key limitations of present day mesh networks. We propose and evaluate two practical and self-stabilizing channel assignment algorithms for multi-channel dual-radio mesh backhauls. The objective is to find a channel assignment that maximizes network capacity through...
The booming multimedia applications are demanding multi-hop communications in high data rate millimeter wave radio WPANs (Wireless Personal Area Networks). However, unable to make use of space reuse, the IEEE 802.15.3 dependent piconet scheme shows its limit when the number of inter-connected piconet grows. In this paper, we introduce the concept of a bridging device - the via to setup multi-hop link...
In this paper the modeling of Omega Networks supporting multi-class routing traffic is presented and their performance is analyzed. We compare the performance of multi-class priority mechanism against the single priority one, by gathering metrics for the two most important network performance factors, namely packet throughput and delay under uniform traffic conditions and various offered loads, using...
Technologies of ad hoc networks have developed rapidly with the research of wireless networks in recent years. More concern has been put on estimating the network capacity instead of link capacity. To investigate how the three factors, topology of the links, ratio between the number of radios and channels, and channel switch delay influence the network capacity, this paper proposes a single-path routing...
Networks on Chip (NoCs) have been shown as an efficient solution to the complex on-chip communication problems derived from the increasing number of processor cores. One of the key issues in the design of NoCs is the reduction of both area and power dissipation. As a result, two-dimensional meshes have become the preferred topology, since it offers low and constant link delay. Unfortunately, manufacturing...
The rapid growth of distributed real-time systems creates a need for cheap and available network solutions while still fulfilling the real-time requirements. In this paper we propose a method for less pessimistic delay analysis for packet switched first come first serve network, when knowing the intervals of possible message generation. Experiments show that the proposed method generates the expected...
It is often desirable to change the logic and/or the connections within an FPGA design on-the-fly without the benefit of a workstation or vendor CAD software. This paper presents a dynamic router for Xilinx FPGAs, designed to run on stand-alone embedded systems. With information obtained from Xilinxpsilas XDL tool, a compact routing database for the Virtex-II/IIP/4 devices is built which only requires...
A customized reconfigurable interconnection network (CRIN) refers to a minimal switching network, yielding routing solutions for any element in a pre-given set of routing requirements. The CRIN design problem looks for the best performance and resource-flexibility trade-off between two extreme design contexts ASIC and FPGA. In this paper we give the modeling of this problem for both directed and undirected...
Multicast is an effective way for increasing the efficiency of network resources utilization. But multicast in MPLS has scalability problems. To solve this problem, we introduce and propose a new mechanism in this paper that adopts label aggregation. Compared with the previous mechanism without label aggregation, it has less delay and reduces label consumption. And when applied to large scale MPLS...
Directional antennas in sensor networks are receiving increasing interest and research due to the potential to increase throughput and reduce delay and interference, while requiring lower transmission power. Considering the stringent operation requirements (low duty-cycle) as MAC congestion problems in large multi-hop networks, WSN performance can benefit enormously from such directional capabilities...
Networks on chips (NoCs) provide a mechanism for handling complex communications in the next generation of integrated circuits. At the same time, lower yield in nano-technology, makes self repair communication channels a necessity in design of digital systems. This paper proposes a reliable NoC architecture based on specific application mapped onto an NoC. This architecture is capable of recovering...
Dependability is an important system attribute for microfluidic lab-on-chip devices. On-line testing offers a promising method for detecting defects, fluidic abnormalities, and bioassay malfunctions during chip operation. However, previous techniques for reading test outcomes and analyzing pulse sequences are cumbersome, sensitive to the calibration of capacitive sensors, and error-prone. We present...
In this paper, based on adaptive ant colony algorithm, we propose an onboard ATM switching fabric in satellite ATM system. We introduce an improved Benes network based on ants flooding mechanism and adaptive dynamic routing mechanism to solve bandwidth-limited and delay-bounded problems in satellite communication network. Compared with traditional self-routing Benes network, better performances of...
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