[srslte-users] Fwd: LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST and iperf destroy the network

[Jane Zhang]

Dear srsLTE team

I run srslte on Jetson TX2 (enb an epc are all in this machine). I have two
problems. Any help would be appreciated.

1)problem 1: When ue attached lte network, epc showed :

Unhandled NAS integrity protected message
LIBLTE_MME_MSG_TYPE_PDN_CONNECTIVITY_REQUEST

I attached log files in this email.  Could anybody have any idea about this
problem?

2) problem 2: when I use iperf on ue (iphone7), the signal became weak
soon. then ue detached the  network. Even if I change ue from air mode and
normal mode, ue can not attched the network ever.


epc terminal for problem 1:

nvidia at nvidia:~/srsLTE-release_19_12/srsepc$ sudo srsepc epc.conf

Built in Release mode using 19.12.0.


---  Software Radio Systems EPC  ---

Reading configuration file epc.conf...
HSS Initialized.
MME S11 Initialized
MME GTP-C Initialized
MME Initialized. MCC: 0xf001, MNC: 0xff01
SPGW GTP-U Initialized.
SPGW S11 Initialized.
SP-GW Initialized.
Received S1 Setup Request.
S1 Setup Request - eNB Name: srsenb01, eNB id: 0x19b
S1 Setup Request - MCC:001, MNC:01, PLMN: 61712
S1 Setup Request - TAC 7, B-PLMN 0
S1 Setup Request - Paging DRX 2
Sending S1 Setup Response
Initial UE message: LIBLTE_MME_MSG_TYPE_ATTACH_REQUEST
Received Initial UE message -- Attach Request
Attach request -- M-TMSI: 0x2c7d62dd
Attach request -- eNB-UE S1AP Id: 1
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: 56
PDN Connectivity Request -- ESM Information Transfer requested: false
UL NAS: Received Identity Response
ID Response -- IMSI: 001010123456780
Downlink NAS: Sent Authentication Request
UL NAS: Received Authentication Response
Authentication Response -- IMSI 001010123456780
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: 001010123456780
Getting subscription information -- QCI 7
Sending Create Session Request.
Creating Session Response -- IMSI: 1010123456780
Creating Session Response -- MME control TEID: 1
Received GTP-C PDU. Message type: GTPC_MSG_TYPE_CREATE_SESSION_REQUEST
SPGW: Allocated Ctrl TEID 1
SPGW: Allocated User TEID 1
SPGW: Allocate UE IP 172.16.0.2
Received Create Session Response
Create Session Response -- SPGW control TEID 1
Create Session Response -- SPGW S1-U Address: 127.0.1.100
SPGW Allocated IP 172.16.0.2 to IMSI 001010123456780
Adding attach accept to Initial Context Setup Request
Initial Context Setup Request -- eNB UE S1AP Id 1, MME UE S1AP Id 1
Initial Context Setup Request -- E-RAB id 5
Initial Context Setup Request -- S1-U TEID 0x1. IP 127.0.1.100
Initial Context Setup Request -- S1-U TEID 0x1. 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 0x4a0003; eNB GTP-U Address 127.0.1.1
UL NAS: Received Attach Complete
Unpacked Attached Complete Message. IMSI 1010123456780
Unpacked Activate Default EPS Bearer message. EPS Bearer id 5
Received GTP-C PDU. Message type: GTPC_MSG_TYPE_MODIFY_BEARER_REQUEST
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
UL NAS: Detach Request
Detach request -- IMSI 001010123456780
Received GTP-C PDU. Message type: GTPC_MSG_TYPE_DELETE_SESSION_REQUEST
Received UE Context Release Complete. MME-UE S1AP Id 1
There are active E-RABs, send release access bearers request
UE Context Release Completed.
^CDeleting eNB context. eNB Id: 0x19b
Deleting UE EMM context. IMSI: 001010123456780
Saving S1AP PCAP file
Deleting UE context in HSS. IMSI: 001010123456780
Deleting UE context in HSS. IMSI: 001010123456781
Deleting UE context in HSS. IMSI: 001010123456789
Deleting UE context in HSS. IMSI: 208920100001104
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