第326回研究講演会開催案内

日時：平成18年9月27日（水）　15:00−16:30
場所：東北大学電気情報系　3号館　　303号室


講師：Professor Pin-Han Ho

講演題目:
  Availability-Constrained Shared Backup Path Protection (SBPP) for
  GMPLS-Based Spare Capacity Reconfiguration

概要：
  Shared-backup path protection (SBPP) has been widely studied in
the Generalized MPLS networks due to its efficient spare capacity sharing
and flexibility in service provisioning. This paper presents a policy-based
model for evaluating the end-to-end (E2E) availability of a SBPP connection
by assuming that no more than two simultaneous failures could possibly occur
in the network. To minimize the redundancy while meeting the E2E
availability requirement, a new parameter is defined for each connection,
called protection level, which creates a framework of partial restoration
from any unexpected failure. Based on the proposed availability model, two
novel policy-based Linear Program (LP) formulations are introduced - called
failure dependent and failure independent policies, which aim to reconfigure
the spare capacity allocation for dynamic provisioning of SBPP connections.
Extensive simulations are conducted to validate the proposed availability
model and demonstrate the effectiveness of the spare capacity
reconfiguration architecture. The proposed availability-aware spare capacity
reconfiguration (SCR) approaches are then implemented on top of a well known
survivable routing scheme - Successive Survivable Routing (SSR), where the
spare capacity saving ratio is taken as the performance measure. We will
show that the proposed SCR framework is an effective approach for achieving
the GMPLS-based recovery in packet-switched networks.

講師紹介:
  Professor Pin-Han Ho received his B.Sc. and M.Sc. Degree from the Electrical
and Computer Engineering department in the National Taiwan University in
1993 and 1995. He started his Ph.D. study in the year 2000 at Queen's
University, Kingston, Canada, focusing on optical communications systems,
survivable networking, and QoS routing problems. He finished his Ph.D. in
2002, and joined the Electrical and Computer Engineering department in the
University of Waterloo, Waterloo, Canada, as an assistant professor at the
same year. Professor Pin-Han Ho is the first author of more than 40 refereed
technical papers and book chapters, and the co-author of a book on optical
networking and survivability. He is the recipient of Distinguished Research
Excellent Award in the ECE department of U of Waterloo, Early Researcher
Award (Premier Research Excellence Award) in 2005, the Best Paper Award in
SPECTS'02 and ICC'05 Optical Networking Symposium, and the Outstanding Paper
Award in HPSR'02.


問い合わせ先：
  堀口進
  東北大学・大学院・情報科学研究科
  情報基礎科学専攻・教授
  〒980-8579 仙台市青葉区荒巻字青葉6番3号09
  電気情報3号棟307室
  電話・FAX　(022) 795-7180