We propose a dynamic light-path establishment method for using wavelengths effectively. In our proposed method, a proportional, integral, derivative (PID) controller is implemented in each edge node. The edge node determines the amount of data to be transmitted with PID control so that a constant amount of data can be stored in the buffer. In addition, light paths are established and released dynamically by comparing the output signal of the PID controller with the maximum amount of data that can be transmitted with the established light paths. Because data can be stored in the buffer for a short time, it is expected that the number of established light paths decreases. We evaluate the performance of the proposed method and investigate the impact of the setting parameters. The effectiveness of the proposed method is shown through a comparison with the conventional method.
© 2009 Optical Society of America
Original Manuscript: December 22, 2008
Revised Manuscript: March 3, 2009
Manuscript Accepted: March 5, 2009
Published: March 31, 2009
Takuji Tachibana and Kenji Sugimoto, "Light-path establishment with PID control for effective wavelength utilization in all-optical wavelength-division multiplexing networks," J. Opt. Netw. 8, 383-392 (2009)