srsue can't decode paging msg

[hz-nokia]

Hello SRSRAN team,

Recently I used B200 to test srsue, I found paging decode failure in ue.log as following:

2023-07-03T01:38:30.475924 [RRC ] [I] Proc "Process PCCH" - starting... 2023-07-03T01:38:30.475925 [RRC ] [I] Proc "Process PCCH" - Received paging (1/1) for UE 180:18446744072942733775 2023-07-03T01:38:30.475925 [RRC ] [I] Proc "Process PCCH" - Received paging for unknown identity 2023-07-03T01:38:30.475925 [RRC ] [I] Proc "Process PCCH" - Completed successfully 2023-07-03T01:38:30.486915 [RRC ] [I] Proc "Cell Reselection" - Starting... 2023-07-03T01:38:30.486916 [RRC ] [D] Proc "Cell Selection" - Skipping cell selection procedure as there are no stronger neighbours in same EARFCN. 2023-07-03T01:38:30.486917 [RRC ] [I] Proc "Cell Selection" - Completed with success. 2023-07-03T01:38:30.486917 [RRC ] [I] Proc "Cell Reselection" - Cell Selection completed. Handling its result... 2023-07-03T01:38:30.486918 [RRC ] [I] Proc "Cell Reselection" - Finished successfully 2023-07-03T01:38:30.495857 [RRC ] [D] MEAS: Processing measurement of 1 cells 2023-07-03T01:38:30.495857 [RRC ] [I] MEAS: New measurement serving cell: earfcn=0, pci=264, rsrp=-75.36 dBm, cfo=+2879.1 Hz 2023-07-03T01:38:30.505099 [RLC ] [I] PCCH message received. 0000: 48 1b 22 2a fc 41 83 2023-07-03T01:38:30.505928 [ASN1 ] [E] [ 0] The condition lb <= n <= ub (0 <= 10 <= 9) was not met 2023-07-03T01:38:30.505929 [ASN1 ] [E] [ 0] [/home/dz/srsRAN/lib/src/asn1/asn1_utils.cc][890] Decoding failure. 2023-07-03T01:38:30.505929 [ASN1 ] [E] [ 0] [/home/dz/srsRAN/lib/include/srsran/asn1/asn1_utils.h][1079] Decoding failure. 2023-07-03T01:38:30.505930 [ASN1 ] [E] [ 0] [/home/dz/srsRAN/lib/src/asn1/rrc/paging.cc][481] Decoding failure. 2023-07-03T01:38:30.505930 [ASN1 ] [E] [ 0] [/home/dz/srsRAN/lib/src/asn1/rrc/paging.cc][546] Decoding failure. 2023-07-03T01:38:30.505930 [ASN1 ] [E] [ 0] [/home/dz/srsRAN/lib/include/srsran/asn1/asn1_utils.h][1091] Decoding failure. 2023-07-03T01:38:30.505930 [ASN1 ] [E] [ 0] [/home/dz/srsRAN/lib/src/asn1/rrc/paging.cc][633] Decoding failure. 2023-07-03T01:38:30.505930 [ASN1 ] [E] [ 0] [/home/dz/srsRAN/lib/src/asn1/rrc/paging.cc][740] Decoding failure. 2023-07-03T01:38:30.505931 [ASN1 ] [E] [ 0] [/home/dz/srsRAN/lib/src/asn1/rrc/paging.cc][715] Decoding failure. 2023-07-03T01:38:30.505931 [ASN1 ] [E] [ 0] [/home/dz/srsRAN/lib/src/asn1/rrc/paging.cc][755] Decoding failure. 2023-07-03T01:38:30.505931 [RRC ] [E] Failed to unpack PCCH message (7 B) 0000: 48 1b 22 2a fc 41 83

And the nas pcap was here:

Could you help to fix this problem, thanks in advance!

BRs Lee

[andrepuschmann]

Hey - could you please share the MAC PCAP that contains the paging message? Thanks

[hz-nokia]

Hi andre,

All the msg in MAC PCAP were same which the info contained illegal checksum as following:

BRs Lee

[hz-nokia]

@andrepuschmann

[hz-nokia]

Hi andre, I have uploaded the info in srsran github issue page.

BRs Lee

At 2023-07-03 16:12:52, "Andre Puschmann" @.***> wrote:

Hey - could you please share the MAC PCAP that contains the paging message? Thanks

— Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: @.***>

[andrepuschmann]

Could you please upload the PCAP, not a screenshot of Wireshark? Thanks

[hz-nokia]

Hi,

@andrepuschmann PCAP file was not supported when upload it. So I have add a postfix of txt in filename, you can change it to pcap when using. I have uploaded 3 file which contained mac pcap, nas pcap and ue log as following:

ue_mac_pcap.txt ue_nas_pcap.txt ue.log