Hi Zhen, Thanks a lot for this draft!
A few comments/questions: - Did you measure the native packet loss rate? - In Table 3 (Wi-Fi), latency of CoAP-CoCoA is the same regardless of the manually introduced packet loss rate. I would expect some C-RTT increase with packet loss rate increase... Which is the reason why C-RTT increase does not happen? Or is there maybe some increase below the millisecond granularity? - I noticed that ICMP RTT for GPRS is 572 ms, while obtained C-RTT is often lower than that value. I guess that is due to the size of the ICMP packets used to measure the ICMP RTT? (It would be good to indicate the size of such packets) - In GPRS, we also observed a slight retry ratio increase for CoAP-CoCoA in low congestion GPRS scenarios. However, the retry ratio was significantly lower for CoAP-CoCoA (compared to CoAP-RAW) in moderate to high congestion conditions. It would be interesting to measure what happens for different offered loads. - Which window size did you use for TCP? Minor: - Is the CoAP client (over UDP) encapsulating the messages as CONs? - Apparently there is a jump from section 4.2 to 4.4. - Section 4.4: s/as composed to/as opposed to - Reference [COAPCC]: s/Networks magazine/Communications magazine Cheers, Carles > FYI. > > > -----Original Message----- > From: I-D-Announce [mailto:i-d-announce-boun...@ietf.org] On Behalf Of > internet-dra...@ietf.org > Sent: Monday, July 04, 2016 11:16 AM > To: i-d-annou...@ietf.org > Subject: I-D Action: draft-zheng-core-coap-lantency-evaluation-00.txt > > > A New Internet-Draft is available from the on-line Internet-Drafts > directories. > > > Title : CoAP Latency Evaluation > Authors : Fei Zheng > Baicheng Fu > Zhen Cao > Filename : draft-zheng-core-coap-lantency-evaluation-00.txt > Pages : 9 > Date : 2016-07-03 > > Abstract: > This document presents the evaluation results of CoAP in terms of > various latency metrics over UDP/TCP under different network > environments. We conduct experiments via both GPRS and WiFi. We > also evaluate how the latency metrics are impacted by the background > traffic. > > > The IETF datatracker status page for this draft is: > https://datatracker.ietf.org/doc/draft-zheng-core-coap-lantency-evaluation/ > > There's also a htmlized version available at: > https://tools.ietf.org/html/draft-zheng-core-coap-lantency-evaluation-00 > > > Please note that it may take a couple of minutes from the time of > submission until the htmlized version and diff are available at > tools.ietf.org. > > Internet-Drafts are also available by anonymous FTP at: > ftp://ftp.ietf.org/internet-drafts/ > > _______________________________________________ > I-D-Announce mailing list > i-d-annou...@ietf.org > https://www.ietf.org/mailman/listinfo/i-d-announce > Internet-Draft directories: http://www.ietf.org/shadow.html or > ftp://ftp.ietf.org/ietf/1shadow-sites.txt > > _______________________________________________ > core mailing list > c...@ietf.org > https://www.ietf.org/mailman/listinfo/core > _______________________________________________ Lwip mailing list Lwip@ietf.org https://www.ietf.org/mailman/listinfo/lwip
