[srslte-users] NAS integrity error

[Samuel Pereira]

Yes, I send it in attachment.


Best regards,

Samuel Pereira

________________________________
De: Pedro Alvarez <pedro.alvarez at softwareradiosystems.com>
Enviado: 3 de maio de 2019 10:35:49
Para: Samuel Pereira
Cc: srslte-users
Assunto: Re: [srslte-users] NAS integrity error

Can you send the epc.pcap?
I want to understand why the UE is sending a pdn connectivity request after the attach procedure.

On Fri, 3 May 2019, 10:22 Samuel Pereira, <samuel.s.pereira at ua.pt<mailto:samuel.s.pereira at ua.pt>> wrote:

Hi Pedro,


I am using srsapn on the dongle. I think that we are supposed to used the one specified in epc.conf, right?


Best regards,

Samuel Pereira

________________________________
De: Pedro Alvarez <pedro.alvarez at softwareradiosystems.com<mailto:pedro.alvarez at softwareradiosystems.com>>
Enviado: 2 de maio de 2019 12:25:02
Para: Samuel Pereira
Cc: srslte-users at lists.softwareradiosystems.com<mailto:srslte-users at lists.softwareradiosystems.com>
Assunto: Re: [srslte-users] NAS integrity error

Samuel --

Does the APN settings on the dongle match the one in srsEPC?
What APN are you using on the dongle?

Cheers,
Pedro

On Thu, May 2, 2019 at 8:27 AM Samuel Pereira <samuel.s.pereira at ua.pt<mailto:samuel.s.pereira at ua.pt>> wrote:
>
> Hello everyone,
>
>
> I am using a Huawei dongle ref. E398 with SRSLTE enb and epc. The system works both with the SRSUE and with a Samsung S4. However, with this dongle we are receiving an error: "Unhandled NAS integrity protected message LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST".
>
> The previous was the following:
>
> Initial UE message: LIBLTE_MME_MSG_TYPE_ATTACH_REQUEST
> Received Initial UE message -- Attach Request
> Attach request -- IMSI Style Attach request
> Attach request -- IMSI: 268080000000002
> Attach request -- eNB-UE S1AP Id: 1720
> Attach request -- Attach type: 2
> Attach Request -- UE Network Capabilities EEA: 11110000
> Attach Request -- UE Network Capabilities EIA: 11110000
> Attach Request -- MS Network Capabilities Present: true
> PDN Connectivity Request -- EPS Bearer Identity requested: 0
> PDN Connectivity Request -- Procedure Transaction Id: 1
> PDN Connectivity Request -- ESM Information Transfer requested: false
> Attach Request -- Found previously attach UE.
> Downlink NAS: Sending Authentication Request
> UL NAS: Received Authentication Response
> Authentication Response -- IMSI 268080000000002
> UE Authentication Accepted.
> Generating KeNB with UL NAS COUNT: 0
> Downlink NAS: Sending NAS Security Mode Command.
> UL NAS: Received Security Mode Complete
> Security Mode Command Complete -- IMSI: 268080000000002
> Getting subscription information -- QCI 7
> Sending Create Session Request.
> Creating Session Response -- IMSI: 268080000000002
> Creating Session Response -- MME control TEID: 41
> SPGW: GTP-C context for IMSI 268080000000002 already exists.
> SPGW: Deleted previous context.
> SPGW: Allocated Ctrl TEID 41
> SPGW: Allocated User TEID 41
> SPGW: Allocate UE IP 172.16.0.42
> Received Create Session Response
> Create Session Response -- SPGW control TEID 41
> Create Session Response -- SPGW S1-U Address: 127.0.1.100
> SPGW Allocated IP 172.16.0.42 to ISMI 268080000000002
> Adding attach accept to Initial Context Setup Request
> Initial Context Setup Request -- eNB UE S1AP Id 1720, MME UE S1AP Id 1223
> Initial Context Setup Request -- E-RAB id 5
> Initial Context Setup Request -- S1-U TEID 0x29. IP 127.0.1.100
> Initial Context Setup Request -- S1-U TEID 0x29. IP 127.0.1.100
> Initial Context Setup Request -- QCI 7
> Received Initial Context Setup Response
> E-RAB Context Setup. E-RAB id 5
> E-RAB Context -- eNB TEID 0x20320003; eNB GTP-U Address 127.0.1.1
> UL NAS: Received Attach Complete
> Unpacked Attached Complete Message. IMSI 268080000000002
> Unpacked Activate Default EPS Bearer message. EPS Bearer id 5
> Sending EMM Information
> Unhandled NAS integrity protected message LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST
> Unhandled NAS integrity protected message LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST
> Unhandled NAS integrity protected message LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST
>
> The same problem was observed with a Huawei PCIe modem.
>
>
> Best regards,
>
> Samuel Pereira
>
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