Hi,
I need help with the following calculations i am having trouble with i dont want someone to do them just so me how to work them out they are as follows
• In a given system, IP packets are used to convey speech samples generated by various sources. For each source a sample is generated every 125 microseconds, and the sample is encoded using 8 binary bits. For a bit rate of 13 Mbps, how many sources can be accommodated?
• In a given system, IP packets are used to convey CD quality music samples generated by various sources. The sampling rate at each source is 44 KHz (44000 samples are made per second) and each sample is encoded using 16 binary bits. Assuming the bandwidth to be 100 Mbps, how many sources can be accommodated?
• Calculate the delay associated with the transmission of a packet (15 Kbytes long) from source to destination, with a physical distance
26  3572 
alrite dude! hows she going? this is my first reply, losing my virginity, first for everything :P. in my humble opinion... 1 microsecond is one millionth of a second(10−6). if there is 13mbps or 13631488 bits per second, or 13.631488 bits per microsecond... 1703.936 bits transferred in 125 microseconds... or one source.
yeah?! lol... been a while!
is this a masters, or phd question! now way this is undergrad!
sorry man one more thing 1 us(microsecond) is the cycle time of 1MHz.
Banfa 9,065
Recognized Expert Moderator Expert
1 microsecond is one millionth of a second(10−6). if there is 13mbps or 13631488 bits per second, or 13.631488 bits per microsecond... 1703.936 bits transferred in 125 microseconds... or one source.
Unfortunately all of this is correct except the last (highlighted step) which is wrong.
 Banfa 9,065
Recognized Expert Moderator Expert
• In a given system, IP packets are used to convey speech samples generated by various sources. For each source a sample is generated every 125 microseconds, and the sample is encoded using 8 binary bits. For a bit rate of 13 Mbps, how many sources can be accommodated?
• In a given system, IP packets are used to convey CD quality music samples generated by various sources. The sampling rate at each source is 44 KHz (44000 samples are made per second) and each sample is encoded using 16 binary bits. Assuming the bandwidth to be 100 Mbps, how many sources can be accommodated?
The method I would use for this is calculate the bandwidth of the source in bps (or kbps or Mbps). Then having done that you can get the number of sources that can be accommodated by dividing the link bandwidth by the bandwidth per source.
• Calculate the delay associated with the transmission of a packet (15 Kbytes long) from source to destination, with a physical distance
Physical distance is not really relevant to electrical links (OK it is a bit but it is not normally thought of in those terms) it is normal to quantify the speed of link is bps which is not directly related to distanced travelled.
thats why you're the admin and im the newbie :P
Can someone please do the calculations 4 me as they are
Thanks
Is this a homework question?
Can someone please do the calculations 4 me as they are
Thanks
Hi,
Is not homework i need them for work
Thanks
Hi,
Any chance someone could show me how to work each calculation out slowly in steps
Thanks
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