draft-ietf-ippm-loss-pattern-03.txt   draft-ietf-ippm-loss-pattern-04.txt 
Internet-Draft IP Performance Metrics (IPPM) WG Rajeev Koodli
Expiration Date: December, 2000 R. Koodli INTERNET DRAFT Nokia Research Center
R. Ravikanth 21 November 2000 R. Ravikanth
Nokia Research Center Axiowave
July 2000
One-way Loss Pattern Sample Metrics One-way Loss Pattern Sample Metrics
<draft-ietf-ippm-loss-pattern-03.txt> <draft-ietf-ippm-loss-pattern-04.txt>
STATUS OF THIS MEMO STATUS OF THIS MEMO
This document is an Internet-Draft and is in full conformance with all This document is an Internet-Draft and is in full conformance with all
provisions of Section 10 of RFC2026. provisions of Section 10 of RFC2026.
Internet-Drafts are working documents of the Internet Engineering Task Internet-Drafts are working documents of the Internet Engineering Task
Force (IETF), its areas, and its working groups. Note that other groups Force (IETF), its areas, and its working groups. Note that other groups
may also distribute working documents as Internet- Drafts. may also distribute working documents as Internet- Drafts.
skipping to change at page 3, line 24 skipping to change at page 3, line 24
packets which may or may not be separated by successfully packets which may or may not be separated by successfully
received packets. received packets.
Example. Let packet with sequence number 50 be considered lost Example. Let packet with sequence number 50 be considered lost
immediately after packet with sequence number 20 was immediately after packet with sequence number 20 was
considered lost. The loss distance is 30. considered lost. The loss distance is 30.
Note that this definition does not specify exactly how to Note that this definition does not specify exactly how to
associate sequence numbers with test packets. In other words, from associate sequence numbers with test packets. In other words, from
a timeseries sample of test packets, one may derive the sequence a timeseries sample of test packets, one may derive the sequence
numbers. However, these sequence numbers must be consecutive numbers. However, these sequence numbers must to be consecutive
integers. integers.
Typo in last sentence.
3.3. Loss period: 3.3. Loss period:
Let P_i be the i'th packet. Let P_i be the i'th packet.
Define f(P_i) = 1 if P_i is lost, 0 otherwise. Define f(P_i) = 1 if P_i is lost, 0 otherwise.
Then, a loss period begins if f(P_i) = 1 and f(P_(i-1)) = 0 Then, a loss period begins if f(P_i) = 1 and f(P_(i-1)) = 0
Example. Consider the following sequence of lost (denoted by x) Example. Consider the following sequence of lost (denoted by x)
and received (denoted by r) packets. and received (denoted by r) packets.
r r r x r r x x x r x r r x x x r r r x r r x x x r x r r x x x
skipping to change at line 457 skipping to change at line 458
Author's Addresses Author's Addresses
Rajeev Koodli Rajeev Koodli
Nokia Research Center Nokia Research Center
313, Fairchild Drive 313, Fairchild Drive
Mountain View, CA 94043 Mountain View, CA 94043
Phone: +1 650-625-2359 Phone: +1 650-625-2359
Email: rajeev.koodli@nokia.com Email: rajeev.koodli@nokia.com
Rayadurgam Ravikanth Rayadurgam Ravikanth
Nokia Research Center Axiowave Networks Inc.
5, Wayside Road 100 Nickerson Road
Burlington, MA 01803 Marlborough, MA- 01752
Phone: +1 781-993-4606 Email: rravikanth@axiowave.com
Email: rayadurgam.ravikanth@nokia.com
 End of changes. 

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