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(12) PATENT APPLICATION PUBLICATION (21) Application No.49/CHE/2005 A
(19) INDIA
(22) Date of filing of Application :20/01/2005 (43) Publication Date : 16/03/2007
(54) Title of the invention : NETWORK ARCHITECTURE AND RELATED METHODS FOR SURVIVING
DENIAL OF SERVICE ATTACKS
(51) International classification :G06F
15/76
(31) Priority Document No :NA
(32) Priority Date :NA
(33) Name of priority country :NA
(86) International Application No :NA
Filing Date
:NA
(87) International Publication No : NA
(61) Patent of Addition to Application :NA
Number
Filing Date
:NA
(62) Divisional to to Application Number :NA
Filing Date
:NA
(71)Name of Applicant :
1)LUCENT TECHNOLOGIES INC.
Address of Applicant :600 MOUNTAIN
AVENUE, MURRAY HILL, NEW JERSEY 07974-
0636. U.S.A.
(72)Name of Inventor :
1)TIAN BU
2)SAMPHEL NORDEN
3)THOMAS Y WOO
No of Pages : 30 No of Claims : 10
(57) Abstract :
Network architecture and related methods for maintaining traffic flow between clients and an endserver
during a Denial of Service (Dos) attack are described herein. The network architecture
includes a set of overlay nodes coupled between clients and a server. Each overlay node is able to
rank and probe other nodes for purposes of selecting a best path for routing traffic to the endserver
to resist a denial of service of attack. Probing is performed to detect overlay nodes having
better performance based on one or more performance metrics (i.e., load, jitter, latency, loss rate).
For instance, in one implementation probing detects lightly loaded overlay paths for purposes of
routing traffic to the end-server, so as to maintain connectivity between the end-server and clients
even under DoS attacks.
The Patent Office Journal 16/03/2007 5360