The User Node routes bearer plane traffic and can be used in 3GPP test cases when separation of control and user traffic is required or desired.
eMBMS Node test case MBMS Control Node: User plane traffic processing between MBMS-GW and eNodeB for MBMS supports data delivery, based on GTPv1-U. IP Multicast is used on this interface to forward data and supports the broadcast mode for the EPS architecture.
In the SGSN Node test case, the User Node provides separate bearer plane interfaces for the emulated RNCs and the GGSN User Node provides a separate bearer plane interface for an emulated GGSN (optional).
Check the Use Alternate User Address box to enable the node.
The User Node is also optional in the GGSN Node test case, and in this case it provides a bearer plane interface for an emulated GGSN. Check the Use Alternate User Address box to enable the node.
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NOTE: Use the Next Hop IP Address in GGSN Node test case to override the static route and out bound port. |
MME Nodal when Dual Connectivity on the NAS Tab is selected. N3IWF Node Emulator test case when N3 to UPF is enabled named N3 to UPF User node.
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Use Alternate User Address |
Available on gNB User Node and Target gNB User Node tabs and selected by default. The 4G gNB user Node is available when Dual Connectivity is enabled on S1-MME NAS tab on AMF Nodal. Tcl Parameter:
When you select Use Alternate User Address, the Control and User Nodes use different IP Addresses and interface. When you clear Use Alternate User Address (not selected):
When a single IP Address is used both the Control and User traffic will be encapsulated into a single measurement tab eNodeB Node. When you Use Alternate IP Address two measurement tabs, gNodeB Node and gNodeB User Node tabs, report the Control and User traffic separately. |
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Cell Access Mode CSG ID MCC MNC |
Available on gNodeB User Node in MME Nodal when Dual Connectivity on the NAS Tab is selected. Select Cell Access Mode. Options: Hybrid , Closed, and Open. Support for CSG (Closed subscriber Group) calls. if enabled by selecting either a closed or Hybrid Subscriber Group, then you must send the CSG Id. Enter the CSG Id: Numerical field- Range from 0 (default) to 134217727. The CSG ID field is enabled when Cell Access Mode is not equal to Open. Enter the MCC (Mobile Country Code - up to 3 digits) and MNC (Mobile Network Code - enter 2 or 3 digits) Tcl Parameter:
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Num gNBs per AMF Enable Target gNB NR Cell ID Tracking Area Code |
Available on gNodeB User Node in SMF Nodal. NR Cell ID and Tracking Area Code are available in Target gNB User Node in SMF Nodal when Test Activity = Intra-AMF Mobility. Enter Num gNBs per AMF. Range : 1 to 1000 Default : 1 Select to Enable Target gNB. Always enabled for Handoff tests such as Intra-AMF. Not available for Capacity / Session Loading tests. Available for selection in Command Mode / Sequencer tests. In Command Mode/Sequencer/ the Xn Handover / N2 handover ODC is available when either a) "Enable Target gNB" is checked or b) "Num gNBs per AMF" is > 1. If "Enable Target gNB" is not checked, the upper limit is "AMF SBI Node/# of Nodes" * "gNB User Node/Num gNBs per AMF" Enter NR Cell ID.
Range: 0 to 68719476735 Enter Tracking Area Code. Range: 0 to 16777215, with optional auto-increment pattern #(nnnnnnnn) or #(nnnnnnnn C/I) Default : 0 Tcl Parameter:
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| Secondary gNB User Node |
Available in MME Nodal when Dual Connectivity and Enable Secondary gNB User Node are enabled on the NAS Tab. Available in AMF Nodal when Test Activity = Dual Connectivity or when Redundant gNB User Node (see below) is enabled (for Support URLLC). Tcl Parameter:
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| Redundant gNB User Node |
This checkbox is enabled only when the "Support URLLC" on AMF Nodal Test configuration tab is checked. Requires SM NAS-5G Version 16.5.0 or higher and SM NGAP Version 16.2.0 or higher. Tcl Parameter:
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Physical Interface |
Enter the Physical Interface details for gNB-CU User Node, gNB-DU User Node and gNB-S-DU User Node The gNB-S-DU User Node is used for Secondary Node configuration on the gNB CU SA Nodal when MR-DC is enabled on the NAS-5G MM Tab. The Tcl parameters below start with "Sn". Tcl Parameter:
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| NR-U |
Available on gNB-DU User Node on the gNB CU NSA Nodal and gNB CU SA Nodal test cases. Flow Control Function on gNB CU Nodal (NSA and SA ) test cases. The Flow Control function is applied when an E-RAB is configured for the split bearer option and only for DL i.e. the flow control information is provided only by the SeNB to the MeNB for the MeNB to control the downlink user data flow to the SeNB. The flow control function is further described in TS 38.425. section 5.4.2 (Downlink Data Delivery Status). The packet loss handling at the DU per spec 38.425 section 5.4.1 Transfer of Downlink User Data. The gNB-S-DU User Node is used for Secondary Node configuration on the gNB CU SA Nodal when MR-DC is enabled on the NAS-5G MM Tab. The Tcl parameters below start with "Sn".
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N3 to UPF |
Available in gNB CU Node when SA Mode is enabled. N2 to AMF Node and N3 to UPF Node become available for input. Tcl Parameter: GnbCuN2Addr Tcl Parameter: GnbCuN3Addr |
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Available in gNB CU Node when Xn Interface is enabled. Tcl Parameter: GnbCuXnUserAddr |
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| gNB CU-UP E1 Node |
Available in gNB CU Node TC when E1 Interface to CU-CP is enabled. Enter gNB-CU-UP ID. 36bits, similar as gNB CU ID. gNB CU NSA/SA Nodal treats leftmost 22 bits as gNB ID (a range from 0 to 4194303), and the left 14 bits as Cell ID (a range from 0 to 16383). Range : 0 to 68719476735. Default : 0 Select to enter the gNB CU-UP Name. Range : up to 50 characters Select to enter the MCC (3 digits) / MNC (2 or 3 digits) of the gNB CU-UP E1 Node. Select the Number of NSSAIs. Range : 1 to 8 Enter the NSSAI (Network Slice Selection Assistance Information). The NSSAI contains two components: the SST (Slice / Service Type) and an optional SD (Slice Differentiator). Range of SST : 0 to 255, default : 1 Range of SD : 1 to 6 Hex Characters Tcl Parameter: GnbCuUpNameEn Tcl Parameter: GnbCuUpName Tcl Parameter: GnbCuUpMcc Tcl Parameter: GnbCuUpMnc Tcl Parameter: GnbCuUpE1Addr Tcl Parameter: GnbCuUpNumNssai Tcl Parameter: GnbCuUpNssai_1 |
In the GGSN Nodal test case, the User Node is optional and it provides bearer plane interfaces for the emulated SGSNs.
When you select Test Activity as Command Mode on the Test Configuration tab, you may select Use Alternate User Address to enable the node and enter an alternate address for data traffic.
Enter the Number of RNCs/BSSs per SGSN.
Option: 1 - 1000.
Tcl Parameter: SgsnUsrNumRncsBss
In GGSN Node test case, when you are using the mXP platform to run STC Data, the Default Routing and Next Hop IP Address parameters are available.
In the HSGW Nodal test case, the User Node simulates one or more UEs that terminate the S1-MME interface.
In addition, when SGW Node Emulation is selected (on Test Configuration tab), Target SGW User Node provides configuration to test the SGW sessions from Target eNodeB User Node via Target MME SUT ending at the Local Mobility Anchor (LMA) SUT.
In MGW Nodal test case, the CN User Node represents the User plane node on the core network side.
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# of Nodes |
Enter Number of Nodes. Range: 1 to 1000 Default: 1 Tcl Parameter: CnUserNodeAddr |
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Starting RTP Port |
Must be an even number. Auto increment by two per mobile subscriber. Range: 1 to 65535 Default: 2000 Tcl Parameter: CnUserRtpPort |
In MME Nodal test case, User Node routes bearer plane traffic and separates control and user traffic.
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NOTE: In the MME Nodal Test case, if MAC Address for the following nodes is configured, then MAC address per eNodeB will increment by 1 based on the configured MAC address. Target eNodeB Control Node, Target eNodeB Security Node, Target eNodeB User Node, eNodeB Control Node, eNodeB Security Node and eNodeB User Node. |
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NOTE: Starting User IP/Mask to include sequence number in GTP-U header and Next Hop Address us available only when your system is licensed for Landslide mX and you select Test Center Chassis on the Data Traffic tab. |
IMPORTANT: In MME Nodal and Node test cases, to support alternative termination point for IPSec tunnel ensure the following settings/configuration:
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In MME Node and SGW Nodal test cases, User Node routes bearer plane traffic and separates control and user traffic.
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Use Alternate User Address |
Available on eNodeB User Node and Target eNodeB User Node tabs and selected by default. Available on MME Node test case on MME S11 Node and Target MME S11 Node when CP-CIoT EPS Optimization Supported is enabled. Available on SGW Nodal test case on MME User Node when CP-CIoT EPS Optimization Supported is enabled. Tcl Parameter:
When you select Use Alternate User Address, the Control and User Nodes use different IP Addresses and interface. When you clear Use Alternate User Address (not selected):
When a single IP Address is used both the Control and User traffic will be encapsulated into a single measurement tab eNodeB Node. When you Use Alternate IP Address two measurement tabs, eNodeB Node and eNodeB User Node tabs, report the Control and User traffic separately. |
In MME Nodal Node test case, SGW User Node is available to process User plane traffic when you select SGW/PGW Node Emulation on the Test Configuration tab to decuple control and user plane traffic.
Target SGW User Node is available to process User plane traffic during mobility testing when SGW Relocation and SGW/PGW Node Emulation on the Test Configuration.
Dual Stack Support |
Use Dual Stack to return both IPv4 and IPv6 addresses when requested. Dual Stack is available for your selection only when you select SGW/PGW Node Emulation or SGW Relocation and SGW/PGW Node Emulation on the Test Configuration tab. Primary Node Tcl Parameter:
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Alternate |
Available when you select Dual Stack Support. Select Alternate Node Address. Alternate Node Tcl Parameter:
The Alternate Node Address you enter must be of IPv6 format if the Physical Interface address type you select for the node is an IPv4 address and vice versa. |
User Nodes are optional in PGW test cases and SMF Nodal, and can be enabled with the Use Alternate User Address checkbox on the User Node sub-tab.
Select Use Alternate User Address to select the test node settings.
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NOTE: When Alternate User Address is not selected, you define same IP address for both GTP tunnels under S5/S8 interface, that is, SGW Control Node and SGW User Node use (the same IP address for both GTP-U and GTP-C). |
Tcl Parameter:
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SgwUsrAddrEn |
SgwUserAddr |
MobSgwUsrAddrEn | MobSgwUsrAddr |
During PGW Node testing, PGW User Node allows you to directly connect PGW on user plane interface and is available only when you select Mobility as Inter-Technology on the Emulator Configuration tab.
Tcl Parameter:
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PdnGwUsrAddrEn |
PdnGwUserAddr |
Dual Stack Support
Use Dual Stack to return both IPv4 and IPv6 addresses when requested. The Alternate pane becomes available to enter IP address.
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PdnGwUsrDualStackEn |
PdnGwUsrAltAddr |
Select Drop Malformed UL User Packets for PGW Node to drop malformed UL packets on SGi interface.
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PdnGwDropMalformedUlUserPktsEn |
During PGW Node testing, Sxb User Node and Sxb User GTP Node allow you to directly connect PGW-U to UP function via the Sxa Control plane and the User plane interface and is available only when you select Sxb Interface to CP on the Emulator Configuration tab. The number of Peers becomes available is User Initiates Association is not selected on the PFCP Tab. Enter the number of peer associations allowed for each node. Enter Number of Peers (1 - 10).
Tcl Parameter:
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SxbUserNodeAddr |
SxbUserGtpUAddr |
SxbUserPeers |
In SGW test case, Num of eNodeBs Per MME is available when Test Activity is Capacity or Command Mode or Sequencer.
Range: 1 - 1000
Default: 1
Tcl Parameter: NumEnbPerMMe
The value you enter is used to determine the total number of eNodeB User Nodes.
Total number of eNodeB User Nodes = Num eNodeB's per MME * # of Nodes (value from the MME Control Node.)
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NOTES: IP addresses must be valid and not overlap (TAS at runtime checks for IP overlap). For example, if you have configured 2 MMEs and 3 eNodeBs Per MME, you much configure a total of 14 IP addresses for MMEs and eNodeBs:
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During SGW Nodal testing, the gNodeB User Node becomes available when Handoff Type = Dual Connectivity and Test Activity = "Intra-MME Mobility" or "Session Loading with Mobility" and Mobility Type= "Intra-MME". Indicates 4G to 5G dual connectivity - phase I. The SGW Nodal will handover between 4G eNodeB and 5G gNodeB. The gNodeB User Node becomes available in Network devices tab. The eNodeB User Node is not available for input.
During MME Nodal testing, the gNodeB User Node becomes available when Dual Connectivity (NAS Tab) is enabled and Test Activity = "Capacity" or " Session Loading Test", or "Intra-MME Mobility", or "Inter-MME Mobility" or "Session Loading with Mobility" and Mobility Type= "Intra-MME" or "Inter-MME" and X2 off. Indicates 4G to 5G dual connectivity - phase I. The SGW Nodal will handover between 4G eNodeB and 5G gNodeB. The gNB User Node becomes available in Network devices tab.
During MME Nodal testing, the Target gNodeB User Node becomes available when Dual Connectivity - Enable Target gNB User Node (NAS Tab) is enabled and Test Activity = "Intra-MME" or "Inter-MME" or "Session Loading with Mobility" and Mobility Type= "Intra-MME" or "Inter-MME" and DC Option = 3x. Indicates support for handover between two dual connected 4G + 5G nodes.
During UPF Nodal testing, the gNodeB User Node is available when Test Activity = "Capacity". The Target gNB User node becomes available on UPF Nodal test case when Test Activity = Mobility, Handoff Type = Xn and Vo5G is enabled. Cell ID, TAC, MCC and MNC are also available for input.
Tcl Parameter:
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GnbUserAddr |
MobGnbUserAddr |
During SGW Nodal testing, PDN GW User Node allows you to directly connect PGW on user plane interface and is available only when you select PGW Node Emulation on the Test Configuration tab.
Select Use Alternate User Address to select the test node settings.
Tcl Parameter:
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PdnGwUsrAddrEn |
PdnGwUserAddr |
During SGW Nodal testing, SGSN S6d Node allows you to connect UE and HSS to the Serving Gateway and PDN GW on user plane interface and is available only when you select HSS Inteface on the Test Configuration tab.
During SGW Node testing, SGW S5 User Node settings allows you to test user plane tunneling between Serving GW and PDN GW and is available only when you select Separate S5 Interface on the Emulator Configuration tab.
Target ePDG User Node settings allows you to test user plane tunneling during handover of call flows between Serving GW and PDN GW and is available only when you select ePDG Node Emulation on the SGW Test Configuration tab or on the MME Nodal Test Configuration Tab.
Select Use Alternate User Address to select the test node settings.
Tcl Parameter:
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TgtEpdgUserAddrEn |
Dual Stack Support
Use Dual Stack to return both IPv4 and IPv6 addresses when requested. The Alternate pane becomes available to enter IP address.
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TgtEpdgUserDualStackEn |
TgtEpdgUserAddr |
TgtEpdgUserAltAddr |
In SGW Node test case, the User Node routes bearer plane traffic and separates control and user traffic.
For SGW User and S5 SGW Control/User test nodes (Primary and Alternate), “the Outbound Traffic Port setting from SGW Control Node is used”.
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Dual Stack Support |
In SGW Node test case, use Dual Stack to return both IPv4 and IPv6 addresses when requested. Tcl Parameter: SgwUserDualStackEn |
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Alternate Node Address |
Available when you select Dual Stack Support. Tcl Parameter: SgwUserAltAddr The Alternate Node Address you enter must be of IPv6 format if the Physical Interface address type you select for the node is an IPv4 address and vice-versa. |
During SGW Node testing, Sxa User Node and Sxa User GTP Node allow you to directly connect SGW-U to UP function via the Sxa Control plane and the User plane interface and is available only when you select Sxa Interface to CP on the Emulator Configuration tab. The number of Peers becomes available is User Initiates Association is not selected on the PFCP Tab. Enter the number of peer associations allowed for each node. Enter Number of Peers (1 - 10).
During SGW Node testing, Sxa+Sxb User Node and Sxa+Sxb User GTP Node allow you to directly connect SGW-U and PGW-U on Sxa+Sxb user plane via the combined Sxa/Sxb Control plane and the User plane interface and is available only when you select Sxa +Sxa Interface to CP and PGW Node Emulation on the Emulator Configuration tab.
Tcl Parameter:
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SxaUserNodeAddr |
SxaUserGtpUAddr |
SxaUserPeers |
In the UMTS test case, the User Node provides separate bearer plane interfaces for the emulated RNCs and the GGSN User Node provides a separate bearer plane interface for an emulated GGSN (optional).
Tcl Parameters:
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PdnGwUserAddr |
SgwUserAddr |
During UMTS testing, the GGSN User Node is available only when you select GGSN Node Emulation on the Test Configuration tab.
During UPF Node testing, SMF/UPF Node Emulation in the AMF Nodal test case and UPF Node Emulation in the AMF Node / SMF Nodal test cases, UPF N4 Node and UPF N4 GTP Node allow you to directly connect UPF (User Plane Function) through the N4 Interface. UPF N4 Node is used for N4 Control Plane while UPF N4 GTP Node is used for N4 User Plane.
The number of Peers becomes available if User Initiates Association is not selected on the PFCP Tab. Enter the number of peer associations allowed for each node. Enter Number of Peers (1 - 10).
Tcl Parameter:
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N4UserNodeAddr |
N4UserGtpUAddr |
N4UserPeers |
The main User Nodes are defined on the User Node sub-tab. Nodes used for mobility handoffs are defined on the Mobility User Node sub-tab when a mobility test is selected.
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NOTES:
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With an Ethernet User Node, you can define:
The IP address and routing options... The IP Address will increment for each node.
The MAC Address to override the Hardware MAC address so the packets sent out of the interface will use the provisioned MAC address rather the Hardware MAC Address.
Custom port selection... and error injection with the Advanced... button. In GGSN Node and Nodal test cases set GTP-U traffic MTU size.
The Outbound Traffic Port to disable the normal routing function and to force packets out of the selected interface.
The Forward Node report tab records the bearer plane traffic forwarded by a GGSN node.
The SGSN Emulation report tab records the aggregate control and bearer plane measurements for all SGSN nodes.