In addition to the query asked by Vikash, When we connect our eNB(USRP210) to core, we get continue log for LTE_RRCConnectionReestablishmentRequest and uplink failure timer timeout.

Can anyone suggest what’s the reason behind these errors?

RRC]   [FRAME 00507][eNB][MOD 00][RNTI 4bbc] LTE_RRCConnectionReestablishmentRequest without UE context, let's reject the UE

[RRC]   [FRAME 00507][eNB][MOD 00][RNTI 4bbc] [RAPROC] Logical Channel DL-CCCH, Generating LTE_RRCConnectionReestablishmentReject (bytes 1)

[MAC]   Removing UE 0 from Primary CC_id 0 (rnti 4bbc)

[RRC]   [FRAME 00557][eNB][MOD 00][RNTI 411c] Decoding UL CCCH 0.0.0.0.0.0 (0x564f70e1a8c1)

[RRC]   [FRAME 00557][eNB][MOD 00][RNTI 411c] LTE_RRCConnectionReestablishmentRequest cause reconfigurationFailure

[RRC]   [FRAME 00557][eNB][MOD 00][RNTI 411c] LTE_RRCConnectionReestablishmentRequest without UE context, let's reject the UE

[RRC]   [FRAME 00557][eNB][MOD 00][RNTI 411c] [RAPROC] Logical Channel DL-CCCH, Generating LTE_RRCConnectionReestablishmentReject (bytes 1)

[MAC]   Removing UE 0 from Primary CC_id 0 (rnti 411c)

[RRC]   [FRAME 00559][eNB][MOD 00][RNTI c84e] Decoding UL CCCH 0.0.0.0.0.0 (0x564f70e156c1)

[RRC]   [FRAME 00559][eNB][MOD 00][RNTI c84e] LTE_RRCConnectionReestablishmentRequest cause reconfigurationFailure

[RRC]   [FRAME 00559][eNB][MOD 00][RNTI c84e] LTE_RRCConnectionReestablishmentRequest without UE context, let's reject the UE

[RRC]   [FRAME 00559][eNB][MOD 00][RNTI c84e] [RAPROC] Logical Channel DL-CCCH, Generating LTE_RRCConnectionReestablishmentReject (bytes 1)

[MAC]   Removing UE 0 from Primary CC_id 0 (rnti c84e)

[RRC]   Removing UE 8413 instance, because of uplink failure timer timeout

[RRC]   [eNB 0] Removing UE RNTI 8413

[RRC]   Put UE 8413 into freeList

[MAC]   rrc_mac_remove_ue: UE 8413 not found

[RRC]   [FRAME 00000][eNB][MOD 00][RNTI 8413] Removed UE context

[RRC]   [release_UE_in_freeList] remove UE 8413 from freeList

[RRC]   Removing UE 5ce6 instance, because of uplink failure timer timeout

[RRC]   [eNB 0] Removing UE RNTI 5ce6

[RRC]   Put UE 5ce6 into freeList

[MAC]   rrc_mac_remove_ue: UE 5ce6 not found

[RRC]   [FRAME 00000][eNB][MOD 00][RNTI 5ce6] Removed UE context

[RRC]   [release_UE_in_freeList] remove UE 5ce6 from freeList

[RRC]   [FRAME 00611][eNB][MOD 00][RNTI baef] Decoding UL CCCH 0.0.0.0.0.0 (0x564f70e0b1e1)

[RRC]   [FRAME 00611][eNB][MOD 00][RNTI baef] LTE_RRCConnectionReestablishmentRequest cause reconfigurationFailure

[RRC]   [FRAME 00611][eNB][MOD 00][RNTI baef] LTE_RRCConnectionReestablishmentRequest without UE context, let's reject the UE

[RRC]   [FRAME 00611][eNB][MOD 00][RNTI baef] [RAPROC] Logical Channel DL-CCCH, Generating LTE_RRCConnectionReestablishmentReject (bytes 1)

[MAC]   Removing UE 0 from Primary CC_id 0 (rnti baef)

[RRC]   [FRAME 00629][eNB][MOD 00][RNTI 4750] Decoding UL CCCH 0.0.0.0.0.0 (0x564f70e1a8c1)

[RRC]   [FRAME 00629][eNB][MOD 00][RNTI 4750] LTE_RRCConnectionReestablishmentRequest cause reconfigurationFailure

[RRC]   [FRAME 00629][eNB][MOD 00][RNTI 4750] LTE_RRCConnectionReestablishmentRequest without UE context, let's reject the UE

[RRC]   [FRAME 00629][eNB][MOD 00][RNTI 4750] [RAPROC] Logical Channel DL-CCCH, Generating LTE_RRCConnectionReestablishmentReject (bytes 1)

[MAC]   Removing UE 0 from Primary CC_id 0 (rnti 4750)

[RRC]   Removing UE 81f0 instance, because of uplink failure timer timeout

[RRC]   [eNB 0] Removing UE RNTI 81f0

[RRC]   Put UE 81f0 into freeList

[MAC]   rrc_mac_remove_ue: UE 81f0 not found

[RRC]   [FRAME 00000][eNB][MOD 00][RNTI 81f0] Removed UE context

[RRC]   [release_UE_in_freeList] remove UE 81f0 from freeList

[RRC]   [FRAME 00711][eNB][MOD 00][RNTI d37d] Decoding UL CCCH 0.0.0.0.0.0 (0x564f70e156c1)

[RRC]   [FRAME 00711][eNB][MOD 00][RNTI d37d] LTE_RRCConnectionReestablishmentRequest cause reconfigurationFailure

[RRC]   [FRAME 00711][eNB][MOD 00][RNTI d37d] LTE_RRCConnectionReestablishmentRequest without UE context, let's reject the UE

[RRC]   [FRAME 00711][eNB][MOD 00][RNTI d37d] [RAPROC] Logical Channel DL-CCCH, Generating LTE_RRCConnectionReestablishmentReject (bytes 1)

[MAC]   Removing UE 0 from Primary CC_id 0 (rnti d37d)

[RRC]   Removing UE 6f7e instance, because of uplink failure timer timeout

[RRC]   [eNB 0] Removing UE RNTI 6f7e

[RRC]   Put UE 6f7e into freeList

[MAC]   rrc_mac_remove_ue: UE 6f7e not found

[RRC]   [FRAME 00000][eNB][MOD 00][RNTI 6f7e] Removed UE context

[RRC]   [release_UE_in_freeList] remove UE 6f7e from freeList

[RRC]   [FRAME 00739][eNB][MOD 00][RNTI 2ac7] Decoding UL CCCH 0.0.0.0.0.0 (0x564f70e0b1e1)

[RRC]   [FRAME 00739][eNB][MOD 00][RNTI 2ac7] LTE_RRCConnectionReestablishmentRequest cause reconfigurationFailure

[RRC]   [FRAME 00739][eNB][MOD 00][RNTI 2ac7] LTE_RRCConnectionReestablishmentRequest without UE context, let's reject the UE

[RRC]   [FRAME 00739][eNB][MOD 00][RNTI 2ac7] [RAPROC] Logical Channel DL-CCCH, Generating LTE_RRCConnectionReestablishmentReject (bytes 1)

[MAC]   Removing UE 0 from Primary CC_id 0 (rnti 2ac7)

[RRC]   Removing UE c48f instance, because of uplink failure timer timeout

Regards,

Surabhi

From: openair5g-user-request@lists.eurecom.fr <openair5g-user-request@lists.eurecom.fr> On Behalf Of Kumar Prasad, Vikash
Sent: Friday, June 11, 2021 1:19 PM
To: openair5g-user@lists.eurecom.fr; openstack-discuss@lists.openstack.org
Subject: How to flush UE context from USRP B210

Dear All,

I am using USRP B210 for my eNB. USRP B210 is storing the context of previous connected UEs, I want to flush

the UE context from USRP, could anyone suggest me how I can flush this previously connected UEs contexts?

Thanks

Vikash kumar prasad