Various broad bandwidth services have being swallowing the bandwidth resource of optical networks, such as the data
center application and cloud computation. There are still some challenges for future optical networks although the
available bandwidth is increasing with the development of transmission technologies. The relationship between upper
application layer and lower network resource layer is necessary to be researched further. In order to improve the
efficiency of network resources and capability of service provisioning, heterogeneous optical networks resource can be
abstracted as unified Application Programming Interfaces (APIs) which can be open to various upper applications
through Application-oriented Integrated Control Center (AICC) proposed in the paper. A novel Openflow-based unified
control architecture is proposed for the optimization of cross layer resources. Numeric results show good performance of
AICC through simulation experiments.
Point-to-Multipoint (P2MP) services in optical networks are more and more important for high-capacity applications.
Steiner tree algorithms have been investigated to compute minimum-cost multicast tree. However, it is difficult to
compute an optimal P2MP tree in multi-domain networks because of isolation of each domain. There are several
algorithms based on Path Computation Element (PCE) for computing multi-domain Point-to-point path, but computing
P2MP Traffic Engineering Label Switched Path (TE-LSP) in a multi-domain networks is still a challenge. In this paper,
three PCE-based schemes for P2MP inter-domain LSP computation are compared in full splitting capability networks,
and a novel Multi-Domain Minimum-cost Path Heuristic (MDMPH) algorithm is proposed. Simulation results proved
that the MDMPH algorithm computes P2MP tree with less cost than the other three schemes.
Flexible bandwidth networking has recently been proposed as a spectrally efficient networking technology that
effectively supports dynamically varying traffic demands [1]. This networking technology provides an opportunity to
maximize spectral efficiency for each of many arbitrary bandwidth channels generated using one of many possible
modulation formats [2]. Path Computation Element (PCE) is first introduced for dynamic routing and spectrum
assignment problem in elastic optical network. We proposed three centralized and distributed routing and spectrum
assignment solutions. They are Centralized Routing and Distributed Spectrum Assignment (CR+DSA), Centralized
Routing and Centralized Spectrum Assignment (CR+CSA) and Distributed Routing and Distributed Spectrum
Assignment (DR+DSA). The two centralized proposals both own PCE in its architecture. The performance of three
proposed centralized and distributed routing and spectrum assignment solutions have been analyzed and compared. For
the experimental evaluation, the performance of Centralized Routing and Centralized Spectrum Assignment is the most
adaptable RSA strategy for the whole bandwidth-variable optical networks with dynamic traffic.
The traditional approach for inter-domain Traffic Engineering Label Switching Path (TE-LSP) computation like BRPC
could provide a shortest inter-domain constrained TE-LSP, but under wavelength continuity constraint, it couldn't
guarantee the success of the resources reservation for the shortest path. In this paper, a Collision-aware Backward
Recursive PCE-based Computation Algorithm (CA-BRPC) in multi-domain optical networks under wavelength
continuity constraint is proposed, which is implemented based on Hierarchical PCE (H-PCE) architecture, could provide
an optimal inter-domain TE-LSP and avoid resources reservation conflict. Numeric results show that the CA-BRPC
could reduce the blocking probability of entire network.
A routing architecture based on PCE has been designed for the large, multi-layer and multi-domain optical networks, and
a PCE-based fast reroute algorithm has been proposed for multi-failures in multi-domain optical networks.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.