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
