[srslte-users] Latest master unwilling :)

[Ralph A. Schmid, dk5ras]

An update: With the changes from the last two days the phone does not connect at all, although it gets an IP address, according to the eNB console. However it appears to be a phone thing, the Huawei Mate 20X 5G is the one that makes trouble, while a cheap Mediatek China crap phone attaches immediately and keeps the connection for hours. 

So it appears something minor has changed what makes the Huawei unhappy...

Now things get funny: I took my Huawei P40 pro and put a test SIM into the second slot - immediate attach. However when I switched data connection to second SIM, it lost connection and kept off. So I went back to the Mate 20X 5G, and put in both SIM slots test SIMs. Now it appears with both Huawei phones only the inactive slot for data logs into the network, while the one with data capability does not attach. 

What do the active data SIM slots have in common? They support 5G. So I tried turning off 5G - and both SIM slots are logged in, and one gets IP connectivity and runs just fine.

Conclusion - something appears odd with 5G!

Need to do more tests if this 100% reproducible...

With best regards

Ralph.


> -----Original Message-----
> From: Pedro Alvarez [mailto:pedro.alvarez at softwareradiosystems.com]
> Sent: 8 May, 2020 20:36
> To: Ralph A. Schmid, dk5ras
> Cc: srslte-users
> Subject: Re: [srslte-users] Latest master unwilling :)
> 
> Can you reproduce this easily?
> Can you send the EPC's pcap and logs?
> 
> On Fri, May 8, 2020 at 5:32 PM Ralph A. Schmid, dk5ras <ralph at schmid.xxx>
> wrote:
> >
> > Hi,
> >
> > when I updated to latest master, using the Lime mini, the radio hardly
> > connects, at identical settings regarding frequency, bandwidth and gains.
> > The machine is some i5, latest Kubuntu.
> >
> > It appears that one after another IP address is assigned to IMSI 000...
> >
> > See here:
> >
> > Creating Session Response -- IMSI: 901700000030796
> > Creating Session Response -- MME control TEID: 4
> > Received GTP-C PDU. Message type:
> GTPC_MSG_TYPE_CREATE_SESSION_REQUEST
> > SPGW: GTP-C context for IMSI 901700000030796 already exists.
> > SPGW: Deleted previous context.
> > SPGW: Allocated Ctrl TEID 4
> > SPGW: Allocated User TEID 4
> > SPGW: Allocate UE IP 172.16.0.5
> > Received Create Session Response
> > Create Session Response -- SPGW control TEID 4
> > Create Session Response -- SPGW S1-U Address: 127.0.1.100
> > SPGW Allocated IP 172.16.0.5 to IMSI 000000000000000
> > Adding attach accept to Initial Context Setup Request
> > Sent Initial Context Setup Request. E-RAB id 0
> > Received UE Context Release Request. MME-UE S1AP Id 5
> > UE is not ECM connected. No need to release S1-U. MME UE S1AP Id 5
> >
> > Any ideas what I am seeing here?
> >
> > When I go back to an older release with the older style config files, all is
> > good, stuff connects without problems and has good throughput.
> >
> > With best regards
> >
> > Ralph.
> >
> >
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