IR302 connection speed reduces over time

IR302 connection speed reduces over time

Hello,

We are using the IR302 LTE modem with the Peplink Mobility 22G antenna in a stationary setup and we are getting good connection speed (downlink and uplink) for a while, but over time (on the order of 30 minutes to 1 hour) the connection speed reduces. Eventually the modem will select a weaker tower and the speeds get even worse. If we reboot the modem it will start with good connection speeds, and then reduce over time again.

We noticed that this issue seems to be somewhat correlated to CPU usage. It slowly increases up to 1.00, which we are guessing is 100% CPU usage?

Here is some data we have collected over the last few days:

10-19-20248:31 AM10/19/2024 8:31:0022.8016.40This is the new router/antenna antenna setup
LTE B5 (824 – 849 UL / 869 – 894 DL)
10-19-20248:34 AM10/19/2024 8:34:0024.7016.90

LTE B5 (824 – 849 UL / 869 – 894 DL)
10-19-20248:40 AM10/19/2024 8:40:0024.0011.20CPU Load (1 / 5 / 15 mins): 0.97 / 0.93 / 0.62
LTE B5 (824 – 849 UL / 869 – 894 DL)
10-19-20248:49 AM10/19/2024 8:49:0024.800.08CPU Load (1 / 5 / 15 mins): 1.01 / 0.96 / 0.74
LTE B5 (824 – 849 UL / 869 – 894 DL)
10-19-20248:50 AM10/19/2024 8:50:0024.800.08CPU Load (1 / 5 / 15 mins): 0.93 / 0.94 / 0.76
LTE B5 (824 – 849 UL / 869 – 894 DL)
10-19-202410:03 AM10/19/2024 10:03:007.960.08CPU Load (1 / 5 / 15 mins): 0.84 / 0.95 / 0.95
LTE B2 (1850 – 1910 UL / 1930 – 1990 DL)
10-20-202410:02 AM10/20/2024 10:02:009.760.08CPU Load (1 / 5 / 15 mins): 1.04 / 1.02 / 0.97
LTE B2 (1850 – 1910 UL / 1930 – 1990 DL)
10-20-202410:35 AM10/20/2024 10:35:005.096.67CPU Load (1 / 5 / 15 mins): 1.04 / 0.88 / 0.73
LTE B2 (1850 – 1910 UL / 1930 – 1990 DL)
10-20-202410:38 AM10/20/2024 10:38:0011.006.68CPU Load (1 / 5 / 15 mins): 0.67 / 0.82 / 0.73
LTE B2 (1850 – 1910 UL / 1930 – 1990 DL)
10-21-202411:45 AM10/21/2024 11:45:000.970.08CPU Load (1 / 5 / 15 mins): 0.97 / 0.95 / 0.95
LTE B2 (1850 – 1910 UL / 1930 – 1990 DL)
10-21-202411:50 AM10/21/2024 11:50:0020.202.54rebooted modem CPU Load (1 / 5 / 15 mins): 0.80 / 0.44 / 0.17
LTE B5 (824 – 849 UL / 869 – 894 DL)
10-21-202411:55 AM10/21/2024 11:55:0022.1011.30CPU Load (1 / 5 / 15 mins): 0.57 / 0.50 / 0.29
LTE B5 (824 – 849 UL / 869 – 894 DL)
10-21-202411:58 AM10/21/2024 11:58:0019.200.08CPU Load (1 / 5 / 15 mins): 0.48 / 0.50 / 0.32
LTE B5 (824 – 849 UL / 869 – 894 DL)
10-21-202412:00 PM10/21/2024 12:00:0019.400.08CPU Load (1 / 5 / 15 mins): 0.49 / 0.51 / 0.34
LTE B5 (824 – 849 UL / 869 – 894 DL)
10-21-202412:05 PM10/21/2024 12:05:0024.700.08CPU Load (1 / 5 / 15 mins): 0.57 / 0.53 / 0.40
LTE B5 (824 – 849 UL / 869 – 894 DL)
10-21-202412:16 PM10/21/2024 12:16:0026.60.08CPU Load (1 / 5 / 15 mins): 0.48 / 0.51 / 0.45
LTE B5 (824 – 849 UL / 869 – 894 DL)
10-21-202412:21 PM10/21/2024 12:21:0025.503.05CPU Load (1 / 5 / 15 mins): 0.52 / 0.51 / 0.46
LTE B5 (824 – 849 UL / 869 – 894 DL)
10-21-202412:29 PM10/21/2024 12:29:0022.800.08CPU Load (1 / 5 / 15 mins): 0.52 / 0.53 / 0.50
LTE B5 (824 – 849 UL / 869 – 894 DL)
10-21-20242:02 PM10/21/2024 14:02:006.220.08CPU Load (1 / 5 / 15 mins): 0.56 / 0.52 / 0.51
LTE B2 (1850 – 1910 UL / 1930 – 1990 DL)
10-21-20242:27 PM10/21/2024 14:27:005.093.26CPU Load (1 / 5 / 15 mins): 0.47 / 0.52 / 0.50
LTE B2 (1850 – 1910 UL / 1930 – 1990 DL)
10-21-20242:35 PM10/21/2024 14:35:0025.800.08rebooted modem CPU Load (1 / 5 / 15 mins): 1.05 / 0.54 / 0.22
LTE B5 (824 – 849 UL / 869 – 894 DL)
10-21-20242:36 PM10/21/2024 14:36:0024.1013.60CPU Load (1 / 5 / 15 mins): 1.01 / 0.66 / 0.29
LTE B5 (824 – 849 UL / 869 – 894 DL)

Other notes:

We are using the measurement lab speed test

Any guidance on things to try would be helpful.

Thanks!