# srsRAN stable connectivity with LimeSDR-mini

**URL:** https://discourse.myriadrf.org/t/srsran-stable-connectivity-with-limesdr-mini/7291
**Category:** RAN Forum
**Created:** [4 August 2021 23:31 UTC](https://discourse.myriadrf.org/t/srsran-stable-connectivity-with-limesdr-mini/7291 "2021-08-04T23:31:32Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![phoenix](https://avatars.discourse-cdn.com/v4/letter/p/0ea827/32.png) [@phoenix](https://discourse.myriadrf.org/u/phoenix)
#### Post date: [4 August 2021 23:31 UTC](https://discourse.myriadrf.org/t/srsran-stable-connectivity-with-limesdr-mini/7291/1 "2021-08-04T23:31:32Z")

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Hi there,

I’m struggling with stable end-to-end connectivity with srsRAN LTE implementation. I’m using LimeSDR-mini as RF frontend for both enb and ue. Every time after successful connection, ping works between epc and ue for 2/3 minutes. After that enb unable to establish connection with ue and reattach failed. Also tried with cots-ue and noticed similar results.

I already opened an issue on srsRAN github two weeks before. No response so far. I’ve tried with different n\_prb, bandwidth, tx\_gain, antenna, dl\_earfcn.

```
Found UE for Downlink Notification 
MME Ctr TEID 0x1, IMSI: 901700000048363
T3413 expired -- Could not page the ue.
Received GTP-C PDU. Message type: GTPC_MSG_TYPE_DOWNLINK_DATA_NOTIFICATION_FAILURE_INDICATION
Found UE for Downlink Notification 
MME Ctr TEID 0x1, IMSI: 901700000048363
T3413 expired -- Could not page the ue.

```

Has anyone here using limesdr-mini encountered this error messages ? Could you please share some ideas.