Thanks Gordon, but I would like how can I calculate for myself... The HCA is a software already done!
Just I would like to know how can I calculate delay from that: TIMESTAMP 18:31:01.248701000 SENDER REPORT MSW: 3351349861 LSW: 1073741824 Sender's packet count: 2 Sender's octet count: 320 RECEIVER REPORT Cumulative number of packets lost: 0 Extended highest sequence number received: 0 Interarrival jitter: 0 Last SR timestamp: 2321891328 Delay since last SR timestamp: 1 TIMESTAMP 18:31:01.280097000 SENDER REPORT MSW: 3351349861 LSW: 1206885810 Sender's packet count: 4 Sender's octet count: 640 RECEIVER REPORT Cumulative number of packets lost: 0 Extended highest sequence number received: 0 Interarrival jitter: 0 Last SR timestamp: 2321893359 Delay since last SR timestamp: 1 TIMESTAMP 18:31:06.280193000 SENDER REPORT MSW: 3351349866 LSW: 1541893259 Sender's packet count: 190 Sender's octet count: 30400 RECEIVER REPORT Cumulative number of packets lost: 0 Extended highest sequence number received: 58034 Interarrival jitter: 165 Last SR timestamp: 2322226151 Delay since last SR timestamp: 1 Regards, David En/na Beith, Gordon ha escrit: > You can have a look at our HCA (Hammer Call Analyzer) product, which > calculates a lot of these metrics for you. > http://www.empirix.com/ecd/ecforms/process/hca-process.asp > Regards, > Gordon > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of David > Grau Serra > Sent: Thursday, March 23, 2006 11:23 AM > To: [email protected] > Subject: Re: [Sip-implementors] SIP: QoS > > Hello all, > > I am sending again my email, does anybody know any rtcp mailing list? > I am working with x-lite softphone. > > >> Hi all list, >> >> My presentation: I am david grau and I am from barcelona. Excuses for >> > my > >> poor english. >> >> I don't know exactly if this mail-list is the appropiate site to say >> what I am doing... so, if not, please, tell me where can I go to say >> > that... > >> My project objective is monitor and evaluate a wireless VoIP (SIP) >> > peer > >> to peer session by analysing RTCP control stream and filtering >> performance parameters such as jitter, delay and packet loss. These >> values will be dynamically plotted in order to provide a visual >> > synopsis > >> of network health. >> I use a command line network sniffer to capture the relevant control >> packets i.e. RTCP sender and receiver reports. >> I parse the RTCP sender and receiver reports to filter out values for >> jitter, delay and packet loss. >> >> I show you part of the parsing: >> >> TIMESTAMP >> 18:31:01.248701000 >> SENDER REPORT >> MSW: 3351349861 >> LSW: 1073741824 >> Sender's packet count: 2 >> Sender's octet count: 320 >> RECEIVER REPORT >> Cumulative number of packets lost: 0 >> Extended highest sequence number received: 0 >> Interarrival jitter: 0 >> Last SR timestamp: 2321891328 >> Delay since last SR timestamp: 1 >> >> TIMESTAMP >> 18:31:01.280097000 >> SENDER REPORT >> MSW: 3351349861 >> LSW: 1206885810 >> Sender's packet count: 4 >> Sender's octet count: 640 >> RECEIVER REPORT >> Cumulative number of packets lost: 0 >> Extended highest sequence number received: 0 >> Interarrival jitter: 0 >> Last SR timestamp: 2321893359 >> Delay since last SR timestamp: 1 >> >> TIMESTAMP >> 18:31:06.280193000 >> SENDER REPORT >> MSW: 3351349866 >> LSW: 1541893259 >> Sender's packet count: 190 >> Sender's octet count: 30400 >> RECEIVER REPORT >> Cumulative number of packets lost: 0 >> Extended highest sequence number received: 58034 >> Interarrival jitter: 165 >> Last SR timestamp: 2322226151 >> Delay since last SR timestamp: 1 >> >> >> I am a newbie and I don't know what exactly I have to do with these >> values. I need to calculate delay, jitter and packet lost but I am >> confuse... >> Just I know how can I calculate jitter: Jitter is measured by RTCP >> software and included in the RR messages sent by the receiver. As this >> > > >> value is measured in sampling units, in order to convert to time >> > units, > >> one must divide by the sampling rate of the media codec. Again using >> > the > >> example data, we have jitter values of 227 and 335 sampling units, >> which, when divided by ITU-T G.711 sampling rate of 8 kHz, correspond >> > to > >> 28.375 ms and 44.125 ms, respectively. >> >> Is anybody available to explain an example to calculate delay and >> > packet > >> lost? >> Thanks in advance. >> >> david grau >> >> _______________________________________________ >> Sip-implementors mailing list >> [email protected] >> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors >> >> >> >> > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
