NDLI: HOTS: An OWAMP-Compliant Hardware Packet Timestamp Recorder

Content Provider	IEEE Xplore Digital Library
Author	Shu, Z. Kobayashi, K.
Copyright Year	2005
Description	Author affiliation: Nat. Inst. of Inf. & Commun. Technol., Tokyo (Shu, Z.; Kobayashi, K.)
Abstract	Accurate timestamps on both the sender and the receiver side are crucial for one-way delay (OWD) measurements. Traditionally, such measurements use software-based timestamps, which could suffer from errors of up to tens of milliseconds. In this paper, we introduce HOTS-a hardware packet timestamp recorder dedicated to OWD measurements. Compared with traditional methods, HOTS has the advantage of: (i) it can generate extremely precise timestamps for both outgoing and incoming OWAMP test packets, and (ii) it eliminates all kinds of software overheads. We present the results of OWD measurements that we carried out using this timestamp recorder and confirm some basic characteristics of the Internet traffic. In addition, we compare these results with those based on traditional methods of obtaining time information. We show that the results of HOTS are more accurate and stable. Although HOTS is developed for measuring OWD, it can also provide accurate timestamps for other applications
Starting Page	32
Ending Page	32
File Size	1300937
Page Count	1
File Format	PDF
ISBN	0769524508
DOI	10.1109/ICAS-ICNS.2005.52
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-10-23
Publisher Place	French Polynesia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Software testing Protocols Bandwidth Computer errors Hardware Time measurement Communications technology Loss measurement Delay Clocks
Content Type	Text
Resource Type	Article

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