Optimization of an Scheduler Buffers in OBS Networks with Forward Resource Reservation

Hiroyuki ICHIKAWA  Koji KAMAKURA 

Publication
B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)  Vol.J95-B  No.7  pp.809-818
Publication Date: 2012/07/01
Online ISSN: 1881-0209
Print ISSN: 1344-4697
Type of Manuscript: Special Section PAPER (Special Section on Frontiers by Young Researchers)
Category: 
Keyword: 
OBS,  Buffer size,  Forward resource reservation,  Blocking probability, 

Full Text(in Japanese): PDF(585KB)

Summary: 
The forward resource reservation is that the burst assembly procedure and the transmission of a burst control packet should be processed in parallel to reduce the burst delay at edge node in OBS networks. The offset period equal to per-hop worst case queuing delays as well as scheduler buffer size. As the size of a scheduler buffer increases, its overflow probability decreases, but offset period increases. In the paper, we demonstrate numerically that an optimal scheduler buffer size may exist and show packet blocking probability can be minimized for determining the optimal size of a scheduler buffer. We show FRR decreases the end-to-end delay compared with non-FRR.