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Amarisoft 4G/5G SDR System

Description

This tutorial contains instructions for setting up amarisoft 5G NR network using SDRs(USRP N310/USRP 2974) in COSMOS SB1. Amarisoft provides software based gNB, 5GCore (eNB,EPC), and UE simulator that run on commodity off-the-shelf devices. A typical software-based cellular basestation/UE consists of a host PC and an SDR, where host PC is used for processing the baseband signals sent to and received from the SDR. Amarisoft supports various SDRs such as Amarisoft PCIe SDR50, SDR100, and USRPs such as N310, X310, 2974. In this tutorial, we run 5GCore, gNB(SA) on a host server+USRP N310 in COSMOS SB1, and the UE simulator on another host server+USRP 2974. The UE simulator can simulate one or more UEs, enabling experiments with large number of users connected to a base station.

Prerequisites

In order to access the test bed, create a reservation and have it approved by the reservation service. Access to the resources is granted after the reservation is confirmed. Please follow the process shown on the COSMOS getting started page to get started.

Resources required

2 servers and 2 SDRs in COSMOS SB1 domain

Tutorial Setup

Follow the steps below to gain access to the sandbox 1 console and set up nodes with appropriate images.

If you don't have one already, sign up for a COSMOS account
Create a resource reservation on sandbox 1
Login into sandbox 1 console (console.sb1.cosmos-lab.org) with two SSH sessions.
Make sure all the resources in the domain are turned off:
```
omf tell -a offh -t system:topo:allres  
```
For this tutorial we will be using the SB1 servers, srv1-lg1, srv2-lg1, USRP N310s in large and medium nodes, sdr1-s1-lg1 and sdr1-md1.

Load 5G-tutorial-cosmos.ndz on srv1-lg1,srv2-lg1.

omf load -i 5G-tutorial-cosmos.ndz -t srv1-lg1,srv2-lg1

Turn all the required resources on and check the status

omf tell -a on -t srv1-lg1,srv2-lg1,sdr1-s1-lg1,sdr1-md1

omf stat -t system:topo:allres

ssh to the servers, use option -Y for using GUI.
```
ssh root@srv1-lg1
```
```
ssh root@srv2-lg1
```

Tutorial Execution

Check the USRPs

Upon logging into the nodes, run eth_config.sh script on both the nodes. This sets up the 10G data interfaces eno1(DATA1), eno2(DATA2). After running the script, you should see that the data interfaces have the appropriate IP addresses assigned, as per this table. The nodes should then be able to access the SDRs which can be checked by running uhd_find_devices.

root@srv1-lg1:~# ./eth_config.sh

root@srv1-lg1:~# ifconfig eno1
eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 9000
        inet 10.38.1.1  netmask 255.255.0.0  broadcast 10.38.255.255
        inet6 fe80::1e34:daff:fe42:c3c  prefixlen 64  scopeid 0x20<link>
        ether 1c:34:da:42:0c:3c  txqueuelen 1000  (Ethernet)
        RX packets 1599884  bytes 10618410950 (10.6 GB)
        RX errors 0  dropped 1  overruns 0  frame 0
        TX packets 1054291  bytes 7901702669 (7.9 GB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

root@srv1-lg1:~# ifconfig eno2
eno2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 9000
        inet 10.39.1.1  netmask 255.255.0.0  broadcast 10.39.255.255
        inet6 fe80::1e34:daff:fe42:c3d  prefixlen 64  scopeid 0x20<link>
        ether 1c:34:da:42:0c:3d  txqueuelen 1000  (Ethernet)
        RX packets 370  bytes 43904 (43.9 KB)
        RX errors 0  dropped 1  overruns 0  frame 0
        TX packets 42  bytes 8066 (8.0 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

root@srv1-lg1:~# uhd_find_devices
[INFO] [UHD] linux; GNU C++ version 9.4.0; Boost_107100; UHD_4.4.0.HEAD-0-g5fac246b
--------------------------------------------------
-- UHD Device 0
--------------------------------------------------
Device Address:
    serial: 3176DF5
    addr: 10.39.2.1
    claimed: True
    fpga: XG
    mgmt_addr: 10.37.2.1
    mgmt_addr: 10.38.2.1
    mgmt_addr: 10.39.2.1
    name: ni-n3xx-3176DF5
    product: n310
    type: n3xx


--------------------------------------------------
-- UHD Device 1
--------------------------------------------------
Device Address:
    serial: 3196937
    addr: 10.39.3.1
    claimed: False
    fpga: XG
    mgmt_addr: 10.37.3.1
    mgmt_addr: 10.38.3.1
    mgmt_addr: 10.39.3.1
    name: ni-n3xx-3196937
    product: n310
    type: n3xx

Run MME

We are going to run the MME, gNodeB on srv1-lg1 and the UE simulator on srv2-lg1.

Run the Amarisoft MME on srv1-lg1. Run lte_init.sh to setup IP forwarding so that the UEs can connect to the Internet, once they establish a connection with the base station. This network uses PLMN 310014 (USA Test network) as configured in mme.cfg.

root@srv1-lg1:~# cd /opt/amarisoft/ltemme-linux-2024-09-13
root@srv1-lg1:/opt/amarisoft/ltemme-linux-2024-09-13# ./lte_init.sh ens3f0
Select ens3f0 interface
Configure NAT for ens3f0
net.ipv4.tcp_congestion_control = bbr
net.core.rmem_max = 62500000
net.core.wmem_max = 62500000
root@srv1-lg1:/opt/amarisoft/ltemme-linux-2024-09-13# ./ltemme config/mme.cfg
Core Network version 2024-09-13, Copyright (C) 2012-2024 Amarisoft
This software is licensed to Rutgers University (The State University of New Jersey).
License server: license.orbit-lab.org (0b-b4-46-dc-2f-83-58-cb)
Support and software update available until 2025-08-18.

(mme)

Type 'help' at the prompt to explore the available mme commands.

Run eNodeB/gNodeB

Run Amarisoft 5G NR Stand alone gNodeB as shown below by passing the gNodeB configuration file as an argument. The configuration file defines SDR(USRP N310) address, operating band, bandwidth and other parameters. To run 4G LTE eNodeB, please use enb-n310.cfg

root@srv1-lg1:~# cd /opt/amarisoft/lteenb-linux-2024-09-13
root@srv1-lg1:/opt/amarisoft/lteenb-linux-2024-09-13# ./lteenb config/gnb-sa-n310.cfg
Base Station version 2024-09-13, Copyright (C) 2012-2024 Amarisoft
This software is licensed to Rutgers University (The State University of New Jersey).
License server: license.orbit-lab.org (0b-b4-46-dc-2f-83-58-cb)
Support and software update available until 2025-08-18.

[INFO] [UHD] linux; GNU C++ version 9.4.0; Boost_107100; UHD_4.4.0.HEAD-0-g5fac246b
[INFO] [MPMD] Initializing 1 device(s) in parallel with args: mgmt_addr=10.38.2.1,type=n3xx,product=n310,serial=3176DF5,name=ni-n3xx-3176DF5,fpga=XG,claimed=False,addr=10.38.2.1,master_clock_rate=122.88e6
[INFO] [MPM.PeriphManager] init() called with device args `fpga=XG,master_clock_rate=122.88e6,mgmt_addr=10.38.2.1,name=ni-n3xx-3176DF5,product=n310,clock_source=internal,time_source=internal'.
RF0: sample_rate=30.720 MHz dl_freq=3489.420 MHz ul_freq=3489.420 MHz (band n78) dl_ant=1 ul_ant=1
WARNING: The GPS is not locked. If you need time synchronization, you should restart the program when the GPS is locked.
(enb)
(enb) ng
gNB NG connection state:
  - server=127.0.1.100:38412 state=setup_done name=amarisoft.amf.5gc.mnc014.mcc310.3gppnetwork.org PLMN=310014
(enb) cell phy
[gnb0012345] PLMN=310014 gNB_ID=0x12345
--------Global-------- -----------DL-------------- -----------UL---------- -----SSB---
Cell    RAT BAND  BW P   ARFCN ANT NL SCS  QAM POW   ARCFN ANT NL SCS  QAM   ARFCN SCS
0x001    NR  n78  20 0  632628   1  1  30  256 -42  632628   1  1  30  256  632544  30
(enb)

Type 'help' at the prompt and use commands like 'cell phy' to look at the various parameters of the base station.

Run Amarisoft UE Simulator

Run the Amarisoft UE simulator on srv2-lg1 by passing the configuration file ue-nr-sa-n310.cfg as an argument. To run UE simulator in 4G LTE mode, please use ue-n310.cfg.

root@srv2-lg1:~# cd /opt/amarisoft/lteue-linux-2024-09-13
root@srv2-lg1:/opt/amarisoft/lteue-linux-2024-09-13# ./lteue config/ue-nr-sa-n310.cfg
UE version 2024-09-13, Copyright (C) 2012-2024 Amarisoft
This software is licensed to Rutgers University (The State University of New Jersey).
License server: license.orbit-lab.org (0b-b4-46-dc-2f-83-58-cb)
Support and software update available until 2025-08-18.

[INFO] [UHD] linux; GNU C++ version 9.4.0; Boost_107100; UHD_4.4.0.HEAD-0-g5fac246b
[INFO] [MPMD] Initializing 1 device(s) in parallel with args: mgmt_addr=10.38.3.1,type=n3xx,product=n310,serial=3196937,name=ni-n3xx-3196937,fpga=XG,claimed=False,addr=10.38.3.1,master_clock_rate=122.88e6
[INFO] [MPM.PeriphManager] init() called with device args `fpga=XG,master_clock_rate=122.88e6,mgmt_addr=10.38.3.1,name=ni-n3xx-3196937,product=n310,clock_source=internal,time_source=internal'.
[WARNING] [RFNOC::GRAPH] One or more blocks timed out during flush!
RF0: sample_rate=30.720 MHz dl_freq=3489.420 MHz ul_freq=3489.420 MHz (band n78) dl_ant=1 ul_ant=1
WARNING: The GPS is not locked. If you need time synchronization, you should restart the program when the GPS is locked.
(ue) DCell 0: SIB found
UHD status: L=0 U=0 S=1

(ue) ue
        # UE_ID CL RNTI    RRC_STATE               EMM_STATE #ERAB IP_ADDR
  NR    0     1  0    0      offline               power off     0
  NR    1     2  0    0      offline               power off     0
  NR    2     3  0    0      offline               power off     0
  NR    3     4  0    0      offline               power off     0
  NR    4     5  0    0      offline               power off     0
(ue) power_on 1 2 3
(ue) ue
        # UE_ID CL RNTI    RRC_STATE               EMM_STATE #ERAB IP_ADDR
  NR    0     1  0 4602      running              registered     1 192.168.2.6
  NR    1     2  0 4601      running              registered     1 192.168.2.2
  NR    2     3  0 4603      running              registered     1 192.168.2.10
  NR    3     4  0    0      offline               power off     0
  NR    4     5  0    0      offline               power off     0
(ue)

Type 'ue' at the prompt to see the status of the UEs and type 'power_on' to start a UE. The above simulation shows 5 UEs, and the number of UEs is specified as UE_COUNT in the configuration file.
Go back to 'mme' prompt in srv1-lg1 and check the gnb, ue list.

(mme) gnb
  PLMN     RAN_ID                        IP:Port #UEctx     TACs
310014    0x12345                127.0.1.1:36113      0     0x64
(mme) ue
            SUPI           IMEISV  CN M-TMSI/5G-TMSI REG           TAC #BEARER IP_ADDR
 001010123456790 0123456700000201 5GC     0xcefe4111   Y 310014.  0x64       1 default/192.168.2.2
 001010123456791 0123456700000301 5GC      0xb52af4b   Y 310014.  0x64       1 default/192.168.2.10
 001010123456789 0123456700000101 5GC     0xd8957de1   Y 310014.  0x64       1 default/192.168.2.6
(mme)

The base station (srv1-lg1) can now talk to the UEs via the IP addresses assigned above.

Iperf test

Network name space and tunnels for each UE.

root@srv2-lg1:~# ip netns list
ue3 (id: 2)
ue1 (id: 1)
ue2 (id: 0)
root@srv2-lg1:~# ip netns exec ue1 ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
10: pdn0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 500
    link/none
    inet 192.168.2.6/24 scope global pdn0
       valid_lft forever preferred_lft forever
root@srv2-lg1:~# ip netns exec ue1 ping 192.168.2.1
PING 192.168.2.1 (192.168.2.1) 56(84) bytes of data.
64 bytes from 192.168.2.1: icmp_seq=1 ttl=64 time=90.1 ms
64 bytes from 192.168.2.1: icmp_seq=2 ttl=64 time=28.9 ms
64 bytes from 192.168.2.1: icmp_seq=3 ttl=64 time=56.8 ms
64 bytes from 192.168.2.1: icmp_seq=4 ttl=64 time=33.9 ms
64 bytes from 192.168.2.1: icmp_seq=5 ttl=64 time=23.9 ms
64 bytes from 192.168.2.1: icmp_seq=6 ttl=64 time=21.9 ms
64 bytes from 192.168.2.1: icmp_seq=7 ttl=64 time=19.9 ms
64 bytes from 192.168.2.1: icmp_seq=8 ttl=64 time=18.7 ms
64 bytes from 192.168.2.1: icmp_seq=9 ttl=64 time=18.0 ms
^C
--- 192.168.2.1 ping statistics ---
9 packets transmitted, 9 received, 0% packet loss, time 8013ms
rtt min/avg/max/mdev = 17.963/34.683/90.140/22.691 ms

Iperf server on the UE

root@srv2-lg1:~# ip netns exec ue1 iperf3 -s -B 192.168.2.6
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------

Iperf client on the base station

root@srv1-lg1:~# iperf3 -c 192.168.2.6 -b 0 -i 1 -t 100
Connecting to host 192.168.2.6, port 5201
[  5] local 192.168.2.1 port 57230 connected to 192.168.2.6 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  4.04 MBytes  33.9 Mbits/sec    0    348 KBytes
[  5]   1.00-2.00   sec  3.42 MBytes  28.7 Mbits/sec    0    574 KBytes
[  5]   2.00-3.00   sec  3.75 MBytes  31.5 Mbits/sec    0    721 KBytes
[  5]   3.00-4.00   sec  3.75 MBytes  31.5 Mbits/sec    0    724 KBytes
[  5]   4.00-5.00   sec  5.00 MBytes  41.9 Mbits/sec    0    798 KBytes
[  5]   5.00-6.00   sec  5.00 MBytes  41.9 Mbits/sec    0    950 KBytes
[  5]   6.00-7.00   sec  5.00 MBytes  41.9 Mbits/sec    0    987 KBytes
[  5]   7.00-8.00   sec  5.00 MBytes  42.0 Mbits/sec    0   1.07 MBytes
[  5]   8.00-9.00   sec  6.25 MBytes  52.4 Mbits/sec    0    990 KBytes
[  5]   9.00-10.00  sec  3.75 MBytes  31.4 Mbits/sec    0    996 KBytes
[  5]  10.00-11.00  sec  6.25 MBytes  52.4 Mbits/sec    0   1.02 MBytes
[  5]  11.00-12.00  sec  2.50 MBytes  21.0 Mbits/sec    0   1.01 MBytes
[  5]  12.00-13.00  sec  3.75 MBytes  31.5 Mbits/sec    0    823 KBytes
[  5]  13.00-14.00  sec  5.00 MBytes  41.9 Mbits/sec    0    940 KBytes
[  5]  14.00-15.00  sec  6.25 MBytes  52.4 Mbits/sec    0   1.01 MBytes
[  5]  15.00-16.00  sec  5.00 MBytes  41.9 Mbits/sec    0    959 KBytes
^C[  5]  16.00-16.91  sec  5.00 MBytes  46.3 Mbits/sec    0    857 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-16.91  sec  78.7 MBytes  39.1 Mbits/sec    0             sender
[  5]   0.00-16.91  sec  0.00 Bytes  0.00 bits/sec                  receiver
iperf3: interrupt - the client has terminated
root@srv1-lg1:~#

Using the Web Interface

Amarisoft Web Interface can be used to analyse software logs and get information in real time. It can also be used to execute UE scenarios.
Point your web browser to http://10.37.1.1/lte/ (10.37.1.1 is the CTRL IP address of srv1-lg1, where the MME and gNodeB are running)
Click 'server' in the left client panel, and add MME, gNodeB, UE to look at the logs. Use the appropriate IP addresses and ports as shown below

Server IP addr Port
MME 10.37.1.1 9000
gNodeB 10.37.1.1 9001
UE 10.37.1.2 9002

Amarisoft 5G NR network on grid.orbit

Required resources: 2 servers, 2 USRP X310s
USRP X310s located about 20m apart on diagonally opposite massive MIMO racks were chosen for the tutorial (node23-5, node24-17)
Load the Amarisoft tutorial image on the servers, and turn them on once imaging is done. Turn on the USRPs as well.
```
omf load -i 5G-tutorial-cosmos.ndz -t node21-5,node21-6
```
```
omf tell -a on -t node21-5,node21-6,node23-5,node24-17
```
Run eth_config_grid.sh on both the servers to setup the IP address of DATA1 interface and the network buffers
```
root@node21-6:~# ./eth_config_grid.sh
net.core.rmem_max = 62500000
net.core.wmem_max = 62500000
```

Run MME and gNodeB on node21-5. The gNodeB uses X310 23-5 as specified in the config file

root@node21-5:/opt/amarisoft/ltemme-linux-2024-09-13# ./lte_init.sh
Select CTRL default interface
Configure NAT for CTRL
net.ipv4.tcp_congestion_control = bbr
net.core.rmem_max = 62500000
net.core.wmem_max = 62500000
root@node21-5:/opt/amarisoft/ltemme-linux-2024-09-13# ./ltemme config/mme.cfg
Core Network version 2024-09-13, Copyright (C) 2012-2024 Amarisoft
This software is licensed to Rutgers University (The State University of New Jersey).
License server: license.orbit-lab.org (0b-b4-46-dc-2f-83-58-cb)
Support and software update available until 2025-08-18.

(mme)

root@node21-5:/opt/amarisoft/lteenb-linux-2024-09-13# ./lteenb config/gnb-sa-n77-40M-x310.cfg
Base Station version 2024-09-13, Copyright (C) 2012-2024 Amarisoft
This software is licensed to Rutgers University (The State University of New Jersey).
License server: license.orbit-lab.org (0b-b4-46-dc-2f-83-58-cb)
Support and software update available until 2025-08-18.

[INFO] [UHD] linux; GNU C++ version 9.4.0; Boost_107100; UHD_4.4.0.HEAD-0-g5fac246b
[INFO] [X300] X300 initialization sequence...
[INFO] [X300] Maximum frame size: 8000 bytes.
[INFO] [X300] Radio 1x clock: 184.32 MHz
[WARNING] [RFNOC::GRAPH] One or more blocks timed out during flush!
RF0: sample_rate=46.080 MHz dl_freq=3948.960 MHz ul_freq=3948.960 MHz (band n77) dl_ant=2 ul_ant=1
Warning, CPU hyperthreading is enabled, we do not recommend using it.
(enb) UHD status: L=0 U=0 S=1
D
(enb) cell phy
[gnb0012345] PLMN=310014 gNB_ID=0x12345
--------Global-------- -----------DL-------------- -----------UL---------- -----SSB---
Cell    RAT BAND  BW P   ARFCN ANT NL SCS  QAM POW   ARCFN ANT NL SCS  QAM   ARFCN SCS
0x001    NR  n77  40 0  663264   2  2  30  256 -45  663264   1  1  30  256  662592  30
(enb)

Run UE Simulator on node21-6 with USRP 24-17

root@node21-6:/opt/amarisoft/lteue-linux-2024-09-13# ./lteue config/ue-nr-sa-n77-40M-x310.cfg
UE version 2024-09-13, Copyright (C) 2012-2024 Amarisoft
This software is licensed to Rutgers University (The State University of New Jersey).
License server: license.orbit-lab.org (0b-b4-46-dc-2f-83-58-cb)
Support and software update available until 2025-08-18.

[INFO] [UHD] linux; GNU C++ version 9.4.0; Boost_107100; UHD_4.4.0.HEAD-0-g5fac246b
[INFO] [X300] X300 initialization sequence...
[INFO] [X300] Maximum frame size: 8000 bytes.
[INFO] [X300] Radio 1x clock: 184.32 MHz
RF0: sample_rate=46.080 MHz dl_freq=3948.960 MHz ul_freq=3948.960 MHz (band n77) dl_ant=2 ul_ant=1
Warning, CPU hyperthreading is enabled, we do not recommend using it.
(ue) power_on
(ue) Cell 0: SIB found

(ue) ue
        # UE_ID CL RNTI    RRC_STATE               EMM_STATE #ERAB IP_ADDR
  NR    0     1  0 4601      running              registered     1 192.168.2.2
(ue)

Throughput testing

root@node21-6:~# ip netns exec ue1 iperf3 -s -B 192.168.2.2
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------

root@node21-5:~# iperf3 -c 192.168.2.2 -b 0 -i 1
Connecting to host 192.168.2.2, port 5201
[  5] local 192.168.2.1 port 35016 connected to 192.168.2.2 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  9.12 MBytes  76.5 Mbits/sec    0    667 KBytes
[  5]   1.00-2.00   sec  7.50 MBytes  62.9 Mbits/sec    0    583 KBytes
[  5]   2.00-3.00   sec  8.75 MBytes  73.4 Mbits/sec    0    583 KBytes
[  5]   3.00-4.00   sec  8.75 MBytes  73.4 Mbits/sec    0    639 KBytes
[  5]   4.00-5.00   sec  7.50 MBytes  62.9 Mbits/sec    0    634 KBytes
[  5]   5.00-6.00   sec  8.75 MBytes  73.4 Mbits/sec    0    710 KBytes
[  5]   6.00-7.00   sec  7.50 MBytes  62.9 Mbits/sec    0    642 KBytes
[  5]   7.00-8.00   sec  8.75 MBytes  73.4 Mbits/sec    0    602 KBytes
[  5]   8.00-9.00   sec  8.75 MBytes  73.4 Mbits/sec    0    747 KBytes
[  5]   9.00-10.00  sec  8.75 MBytes  73.4 Mbits/sec    0    639 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  84.1 MBytes  70.6 Mbits/sec    0             sender
[  5]   0.00-10.06  sec  81.0 MBytes  67.5 Mbits/sec                  receiver

iperf Done.

When the UE simulator starts, please make sure the RSRP is good enough to achieve a connection and good throughput. In this case, maximum gain on the USRPs, 2X2 MIMO were used to get a good signal strength.

(ue) t
Press [return] to stop the trace
----------------------Hz---ppm----dB----dBm-----------------------DL---------- ---------------------UL-
UE_ID  RAT CL RNTI   CFO   SRO  SINR   RSRP  mcs retx rxko rxok brate     #its  mcs  ta retx   tx brate
    1   NR 00    - -1264  -0.3  24.3  -65.0    -    0    0    0     0        -    -  16    0    0     0
    1   NR 00    - -1274  -0.3  26.8  -64.8    -    0    0    0     0        -    -  16    0    0     0
    1   NR 00    - -1274  -0.3  26.5  -64.7    -    0    0    0     0        -    -  16    0    0     0
    1   NR 00    - -1275  -0.3  26.6  -64.8    -    0    0    0     0        -    -  16    0    0     0

Last modified 6 weeks ago Last modified on Nov 12, 2024, 9:04:08 PM

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