...also, I still remain unconvinced that the UEs are transmitting any upload traffic -- even when properly marked with the right DSCP -- on the dedicated bearer. Until it is proven beyond a doubt that this works, testing upload capacity using dedicated bearers is probably a waste of time because it isn't doing what you think it is doing.
I have tested both CPE7000 and CPE8000 at this point, and have the same issue on both, so I don't think it is a CPE firmware bug (that would be a freaky coincidence, given that both CPEs are contract-manufactured by different companies). So I don't know if this is me being stupid and not configuring my EPCs correctly, or what. But something is not working here. -- Nathan From: [email protected] [mailto:[email protected]] On Behalf Of Nathan Anderson Sent: Monday, February 06, 2017 2:06 PM To: 'Adam Moffett'; [email protected] Subject: Re: [Telrad] Uplink throughput again Something that I learned that I should point out: A dedicated bearer with a higher priority should take precedence over default bearer traffic, yes. But from what I can tell, LTE spec. does not have a way of putting a total speed cap on the entire UE across any and all bearers. The UE AMBRs only restrict all non-GBR bearers (default or not, even across multiple APNs) but does NOT take into account GBR bearers, and QCI 1 is GBR. What this means is that, for example, if you have a default bearer with QCI 6, and dedicated bearer with QCI 1, and the UE DL and UL AMBRs are set to 10 and 1 Mbit/s respectively, and your dedicated bearer's MBRs are set to 5 and 0.5 (half of the UE AMBRs, for the sake of this example), you haven't actually set up things such that up to half of the subscriber's AMBRs are given priority on the dedicated bearer, leaving that user half of his total bandwidth if you end up filling the dedicated bearer up to its MBR in both directions. No, instead because the GBR QCIs are not accounted for within the AMBR, the user can move up to 5x0.5 on the dedicated bearer and *simultaneously* also move up to 10x1 (assuming there is enough sector capacity at the time) on the default bearer. Maybe in some cases, this is desireable. If you use QCI 1 for VoIP, for example, then you are effectively providing the customer with a separate channel for their voice calls that does not dip into their configured speed package, but is instead additive. But it is something to keep in mind as you are planning and building your network as well as running tests. -- Nathan From: [email protected]<mailto:[email protected]> [mailto:[email protected]] On Behalf Of Adam Moffett Sent: Monday, February 06, 2017 1:48 PM To: [email protected]<mailto:[email protected]> Subject: Re: [Telrad] Uplink throughput again The EPC and most of the eNB are running the latest general release available on Zendesk. A couple of eNB are running some kind of maintenance release that support wanted us to try. I'm making sure to run iPerf on the dedicated bearer to eliminate other user traffic from weaker UE as a factor. At QCI 1 it should take precedence over the default bearer traffic. I would definitely take the time to set one up, not necessarily for this purpose, but rather to ensure you always have access to your UE. If the default bearer is hosed with a torrent and you don't have a dedicated bearer for management access then you can be completely locked out of the unit. Monitoring, management access, and firmware updates all work more reliably with the dedicated bearer and I'd strongly recommend it. There's a knowledge base article in Zendesk about it. Use DSCP 6 because that's tagged by default in the UE. ------ Original Message ------ From: "Jeremy Austin" <[email protected]<mailto:[email protected]>> To: "Adam Moffett" <[email protected]<mailto:[email protected]>>; [email protected]<mailto:[email protected]> Sent: 2/6/2017 4:30:43 PM Subject: Re: [Telrad] Uplink throughput again On Mon, Feb 6, 2017 at 12:20 PM, Adam Moffett <[email protected]<mailto:[email protected]>> wrote: Can somebody tell me if they're getting expected uplink throughput? What ENB and EPC revisions are you at, Adam? We're investigating this same issue ourselves, although we haven't tried a dedicated bearer. -- Jeremy Austin (907) 895-2311 (907) 803-5422 [email protected]<mailto:[email protected]> Heritage NetWorks Whitestone Power & Communications Vertical Broadband, LLC Schedule a meeting: http://doodle.com/jermudgeon
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