In this paper, a novel survivable algorithm with dynamic load balancing shared-path protection is proposed, named
DLBSPP algorithm, in spectrum-elastic optical path networks (SLICE). To tolerate multi-link failures in SLICE, traffic
self-adaptive restoration (TSAR) mechanism is adopted to restore the traffic affected by the failures. Simulation results
show that, compared with the conventional SPP algorithm, DLBSPP algorithm has lower blocking probability (BP),
better spectrum utilization ratio (SUR) and higher failure restoration ratio (FRR).
We report a multifunctional silicon micromachined gyroscope. The gyroscope can sense the rolling, yawing, and pitching angular velocity synchronously. Both the principle and the experiment of the gyroscope are presented to explain the multifunction. We also discuss the way to determine the deflecting direction and deflecting position of the rotating carrier in the gravitation field.
The multi-layer network for the interworking between Generalized Multi-Protocol Label Switching (GMPLS) and
Labeled Optical Burst Switching (LOBS) is nowadays attractive for the future IP/DWDM network. In this paper, an
effective protocol interface based on overlay model was proposed to enable the transparent transmission of Burst Header
Packets (BHPs) and data bursts between OBS domains via a GMPLS network, while maintaining a simple interworking
operation between LOBS and GMPLS networks. Moreover, the interface was implemented and evaluated by using a
GMPLS/LOBS testbed, and the experimental results verified that it works effectively on the GMPLS/LOBS
interconnection networks.
In order to provide quality-of-service (QoS) in OBS, in this paper, a novel QoS classification based assembly algorithm
for OBS is introduced. By employing assembly time and offset time based QoS classifier at edge node it supports QoS
with more delicate time intervals and higher transmit rate. It also contributes to decrease the consisting congestion in the
network. The design is implemented using Network Processor (NP) and evaluation results show the improvement for
supporting multilevel QoS services.
Channel scheduling is a key technology in Optical Burst Switch network. In conventional sense, BHP (burst header packet) is always processed at the core node once it is received. Compared with these immediate scheduling algorithms, BHP will be delayed to a time window in Group Channel-Schedule Algorithm before it is scheduled. As for the Group-Channel Schedule Algorithm, analysis was made to investigate the influence caused by the schedule time window ▵t on the performance of OBS network. Then comparison is made between the currently used immediate schedule algorithms and the group-schedule algorithm. Evaluation results show that the packet loss performance is improved.
This paper investigates some key issues in designing an OBS edge node, such as burst assembler and burst scheduler, and then demonstrates a prototype of the OBS edge node based on current technology level. Experimental results verify various modules in the proposed OBS edge node.
This paper related the structural principle and property of piezoelectric quart tilt meter. The tilt meter used symmetric support structure and differential frequency output had distinguish ability 0.0014 degrees, no linearity 0.13 percent and response time less 50ms.
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