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A resource allocation scheme consisting of joint assignment of routing, wavelength and time-slot is proposed to construct different channels in software-defined optical networks secured by quantum key distribution (QKD). Security level is considered by key-updating period.
Generally speaking, controllability of multi-agent systems refer to transferring the remaining agents of such system from any arbitrary initial state to any final state by controlling dynamics of a small amount of agents under exchanged information between each other, which makes the system reflect the effect of a whole, that is the complete controllability. Comparing with the complete controllability...
In this paper, the output containment control problem of heterogeneous linear multi-agent systems is investigated. The objective of the output containment control problem is to make a group of agents converge to a convex hull spanned by some leaders. A distributed control law based on output regulation framework is proposed, where a distributed observer is designed in the control law for agents estimating...
We propose a survivable routing and resource assignment scheme with MPP and SRLG in VON to get less resources consumption and enough protection against physical failure. 29% reduction in resource consumption can be achieved.
For the first time, re-provisioning is introduced into advanced reservation enabled optical transport networks as a novel perspective for optimization. Demonstration results show parallel service re-provisioning (PSRP) can improve the efficiency of network resource significantly.
MAC interference in IEEE 802.11 network is caused by overlapped signal ranges and complex carrier sensing topology. Data throughput and wireless coverage increases by sender's transmission power in free space and this property identified the transmission power as a standard indication for wireless efficiency; however, increased transmission power also implies longer reachable signal range and higher...
We define k-content connectivity as the reachability of at least one content from any point of a data center network under concurrent k-1 failures. A flexible content placement algorithm is proposed to achieve k-content connectivity.
For large scale multi-domain elastic optical networks, we propose a combination of distributed and centralized control architecture (DC-CA) based on stateful hierarchical PCE. Experiment results are presented from DC-CA testbed and automated provisioning and recovery time of multi-fault are reported.
In this paper, we propose a novel re-restoration mechanism based on fuzzy fault set under multi-faults in optical transport networks. This new scheme inherits from our already proposed FFS (fuzzy fault set) based restoration mechanism which is a reasonable trade-off between the recovery success rate and the remaining network risk resources. We mainly consider the link faults in the simulation because...
In the design of Wireless Mesh Network (WMN) for small cell backhaul, deployment cost and reliability are important considerations and are mainly determined by network topology. Reliability ensures the network quality for clients and cost is a major concern in telecom operators. In practice, increasing redundant network links improves the reliability of a backhaul network, but increases the cost substantially...
With the expansion of optical networks, the failure probability of dual-link failure has also improved, so it is urgent to find novel protection structures to deal with dual-link failure. In this paper, we mainly focus the protection structures to solve the problem. Firstly, we describe the scenarios and the problem of dual-link failure. Then, theory of pre-configured polyhedron (p-Poly) is introduced...
Moving from dynamic lighptpath provisioning to virtual network provisioning, Optical as a Service (OaaS) is developing rapidly driven by data center application, which could be mainly enabled by Software Defined Networking (SDN).
Based on the reasonable modeling of the spectrum consecutiveness around the node, the concept of node handling capacity is proposed which can effectively indicate the degree of spectrum fragmentation in flexible grid optical networks.
We construct k-regular and k-(edge)-connected structures for providing protection against multiple failures in optical transport networks. It improves the spare resources efficiency without increasing the complexity of design and implementation of protection mechanisms.
We propose two novel adaptive spectrum defragmentation algorithms in elastic optical networks by properly rerouting existing connections based on the evaluation of current network status, and numerical evaluation shown to be resource efficient.
A stateful PCE-based multi-link failure localization mechanism using fuzzy fault set is implemented in multi-domain large capacity optical networks. The novel localization mechanism has high scalability, speed and success rate compared with extended LVM protocol.
An integrated hierarchical PCE model is proposed to relieve the path selection policy constraint by the parent PCE in the hierarchical PCE (H-PCE) framework. The parent and child PCEs are unified by routing at a higher level in this new model, where each PCE maintains the summarized information of all the other domains apart from its interior link states in the Traffic Engineering Database (TED)....
A unified control plane is necessary to be designed for multi-layer optical networks, especially for IP over WDM networks to improve the performance and efficiency of the entire networks. This paper focuses on the framework of PCE-based unified control plane, and proposes some strategies for different optimization objectives.
In our previous work, a SDH Synchronous Links Organization Testing, Optimizing and Evaluating (SDH-SLOTOE) platform focusing on power communication networks has been founded supported by China Electric Power Research Institute (CEPRI). In this paper, SDH-SLOTOE is expanded to a PTN-SLOTOE platform. The Ethernet Synchronization Messaging Channel (ESMC) defined in ITU-T G.8264 is supported, and multi-standby...
Different from general multi-failure, group-failure in cross-layer intelligent optical networks has the characteristic of cluster. Because multi-failure may occur due to single failure, it is more harmful for multi-failure than single failure. The original survivability with regards to multiple single failures is not suitable for group-failure based cross-layer survivability research. Group-failure...
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