Timeline for What is "1 Erlang" for network data traffic?
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| Oct 13, 2013 at 18:28 | comment | added | Mike Pennington | @andreyT, you might be able to quantify your general traffic in erlangs if the time-period is long enough and the customers have a financial incentive to limit their traffic consumption; however, we're probably talking longer time periods for estimates... definitely not measured in minutes. What percentage of error is acceptable in the estimate? What are the inputs to this calculation? | |
| Oct 13, 2013 at 17:40 | comment | added | AnT stands with Russia | I.e. discarding the whole thing under "this is absolutely the wrong way to do it" is not accepted as a solution at this point. | |
| Oct 13, 2013 at 17:37 | comment | added | AnT stands with Russia | The objective is to develop a technique that would allow estimating the load in Erlangs (and apply other Erlangs-based calculations) to a system that handles mixed traffic: to a cellular base station, specifically, which handles both voice and data traffic. This is an "academic" problem at this stage with a "brainstorming" flavor to it, i.e. the statement of the problem explicitly says that it has to be done by estimating everything in Erlangs. | |
| Oct 11, 2013 at 10:22 | comment | added | Mike Pennington | @AndreyT, I think you're trying to solve a problem by calculating internet traffic in Erlangs; however, that's going to be hard unless the bandwidth consumed by the traffic in question is constant over time. VoIP is a special case of general internet traffic; it can be quantified in Erlangs because it's a relatively constant-bandwidth stream. However, the vast majority of internet traffic is not constant-bandwidth. Could you help me understand what problem you're solving with the Erlang calculations? | |
| Oct 10, 2013 at 21:17 | comment | added | AnT stands with Russia | Ideally, I'd want to be able to describe the load of a device that simultaneously handles different kinds of traffic (like voice and Internet traffic) through independent comm channels at the same time. Is there a way to come a with a single Erlang value for such a device? | |
| Oct 10, 2013 at 21:17 | comment | added | AnT stands with Russia | Thank you for your reply. I see that the answers seems to be specific to sending voice traffic over data network. But what about non-voice applications, like general Internet traffic? Is there any meaningful way to include such traffic into the count? | |
| Oct 10, 2013 at 14:13 | vote | accept | AnT stands with Russia | ||
| Oct 10, 2013 at 13:05 | history | edited | Mike Pennington | CC BY-SA 3.0 |
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| Oct 10, 2013 at 10:27 | history | edited | Mike Pennington | CC BY-SA 3.0 |
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| Oct 10, 2013 at 10:09 | history | edited | Mike Pennington | CC BY-SA 3.0 |
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| Oct 10, 2013 at 9:15 | comment | added | Mike Pennington | Cisco is using the bandwidth consumed by a G.711 codec in their definition of a call. However, there are many possible voice codecs; almost nobody uses a G.711 codec if they care about bandwidth efficiency. This is why I said you can't apply it "generically" to data traffic. | |
| Oct 10, 2013 at 9:07 | comment | added | AnT stands with Russia | That was my initial understanding. However this article on Cisco site cisco.com/en/US/docs/ios/solutions_docs/voip_solutions/… applies Erlang units to data traffic in "Using the Erlang C Traffic Model for Data" example. They say that since they can buy bandwidth in 64,000 bps increments, then 960,000 bps of desired bandwidth represents 15 Erlangs. This strikes me as completely arbitrary. Why would the "size" of Erlang depend on what increment they can buy bandwidth in? | |
| Oct 10, 2013 at 9:03 | history | edited | Mike Pennington | CC BY-SA 3.0 |
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| Oct 10, 2013 at 8:51 | history | answered | Mike Pennington | CC BY-SA 3.0 |