1.1 Signaling Tracing over Standard Interfaces Signaling messages over standard interfaces, including S1, X2, and Uu interfaces, can be traced on the Web LMT or U2000. 1.1.1 Signaling Tracing on the Web LMT In the Web LMT window, click the Trace tab page. In the navigation tree on the left, choose Trace > Interface Trace Task, double-click S1 Trace, X2 Trace, or UU Trace to trigger the corresponding tracing task. 1.1.1.1 Signaling Tracing on the S1 Interface Step 1 Create a tracing task.
LTE Signaling Tracing
Nov 09, 2015
LTE Signaling Tracing
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Signaling Tracing over Standard InterfacesSignaling messages over standard interfaces, including S1, X2, and Uu interfaces, can be traced on the Web LMT or U2000.Signaling Tracing on the Web LMTIn the Web LMT window, click the Trace tab page. In the navigation tree on the left, choose Trace > Interface Trace Task, double-click S1 Trace, X2 Trace, or UU Trace to trigger the corresponding tracing task.
Signaling Tracing on the S1 InterfaceCreate a tracing task.
Field NameDescription
Trace DirectionSpecifies the direction of messages to be traced on the S1 interface. It can be set to Trace Both, Trace Sender, or Trace Receiver.
Trace TypeSpecifies the MME to trace. It can be set to All MME or Specific MME. If Specific MME is selected, enter the S1 interface ID so that messages related to this MME can be traced. Otherwise, messages related to all MMEs will be traced.
Message TypeSpecifies the type of messages to be traced over the S1 interface. You can set it to Select All to trace all messages or select one or more message types to trace messages of specified types.
Autosave to FileIf you select Autosave to File, the tracing result will be automatically saved. You can set the file path and file name. The file format is .tmf by default.
View the tracing result.
Save the tracing result. Right-click the trace task and choose Stop Trace Task from the shortcut menu to stop the task. Then, right-click the task and choose Save All Messages to save the results to the local PC in .tmf format.
A maximum of 12 tracing tasks over the S1 interface can be executed simultaneously, and parameters of two tasks cannot be identical. You can trace messages related to a maximum of 16 MMEs over one S1 interface
Signaling Tracing on the X2 InterfaceCreate a tracing task.
Field NameDescription
Trace DirectionSpecifies the direction of messages to be traced on the X2 interface. It can be set to Trace Both, Trace Sender, or Trace Receiver.
Trace TypeSpecifies the eNodeB to trace. It can be set to All eNodeB or Specific eNodeB. If Specific eNodeB is selected, enter the eNodeB ID and PLMN so that messages related to this eNodeB can be traced. Otherwise, messages related to all eNodeBs will be traced.
Message TypeSpecifies the type of messages to be traced over the X2 interface. You can set it to Select All to trace all messages or select one or more message types to trace messages of specified types.
Autosave to FileIf you select Autosave to File, the tracing result will be automatically saved. You can set the file path and file name. The file format is .tmf by default.
View the tracing result.
Save the tracing result. Right-click the trace task and choose Stop Trace Task from the shortcut menu to stop the task. Then, right-click the task and choose Save All Messages to save the results to the local PC in .tmf format.
A maximum of 12 tracing tasks over the X2 interface can be executed simultaneously, and parameters of two tasks cannot be identical. You can trace messages related to a maximum of 16 eNodeBs over one X2 interface.
Signaling Tracing on the Uu InterfaceCreate a tracing task.
Field NameDescription
Trace DirectionSpecifies the direction of messages to be traced on the Uu interface. It can be set to Trace Both, Trace Sender, or Trace Receiver.
Trace TypeSpecifies the cell to trace. It can be set to All Cell or Specific Cell. If Specific Cell is selected, enter the Cell ID so that messages related to this cell can be traced. Otherwise, messages related to all cells will be traced.
Message TypeSpecifies the type of messages to be traced over the Uu interface. You can set it to Select All to trace all messages or select one or more message types to trace messages of specified types.
Autosave to FileIf you select Autosave to File, the tracing result will be automatically saved. You can set the file path and file name. The file format is .tmf by default.
View the tracing result.
Save the tracing result. Right-click the trace task and choose Stop Trace Task from the shortcut menu to stop the task. Then, right-click the task and choose Save All Messages to save the results to the local PC in .tmf format.
A maximum of 12 tracing tasks over the Uu interface can be executed simultaneously, and parameters of two tasks cannot be identical. You can trace messages related to a maximum of 11 cells over one Uu interface. Signaling Tracing on the U2000On the menu bar of the U2000, choose Monitor > Signaling Trace > Signaling Trace Management.
In the displayed window, expand the trace navigation tree, and double-click S1 Interface Trace, X2 Interface Trace, or Uu Interface Trace of the Application Layer node to trigger the corresponding tracing task.
Signaling Tracing on the S1 InterfaceCreate a tracing task.Double-click S1 Interface Trace. In the displayed Create Trace Task dialog box, as shown in the following figure, specify the tracing task name and select a device in the navigation tree.
In the S1 Interface Trace dialog box, configure Report Type, Trace Direction, Trace Inclusion (All MME or Specific MME), and Message Type (recommended value: Default). Two report types can be selected: Message Report and File Report. In Message Report mode, the eNodeB sends signaling messages in real time to the U2000 server, which greatly affects the U2000 performance. In File Report mode, the eNodeB records signaling messages in a file, and periodically sends the file to the U2000 server, which only slightly affects the U2000 performance. When this mode is selected, you need to specify Report Period (Minutes). If the eNodeB has multiple S1 links, you need to select the corresponding S1 link number to trace. If you need to trace messages over all the links, set Trace Inclusion to ALL MME. If you select Specific MME, you need to specify the S1 link ID. If there are multiple ID numbers, separate them using a slash (/). For the description of other fields, see section 1.1.1 "Signaling Tracing on the Web LMT."
View the tracing result.
Save the tracing result.Right-click the trace task and choose Stop from the shortcut menu. If the task status is Finished, click Export to save the tracing result to the PC in .tmf format.
Signaling Tracing on the X2 InterfaceCreate a tracing task.Double-click X2 Interface Trace. In the displayed Create Trace Task dialog box, as shown in the following figure, specify the tracing task name and select a device in the navigation tree.
In the X2 Interface Trace dialog box, configure Report Type, Trace Direction, Trace Inclusion (All eNodeB or Specific eNodeB), and Message Type (recommended value: Default).
View the tracing result.
Save the tracing result.Right-click the trace task and choose Stop from the shortcut menu. If the task status is Finished, click Export to save the tracing result to the PC in .tmf format.
Signaling Tracing on the Uu InterfaceCreate a tracing task.Double-click Uu Interface Trace. In the displayed Create Trace Task dialog box, as shown in the following figure, specify the tracing task name and select a device in the navigation tree.
In the Uu Interface Trace dialog box, configure Report Type, Trace Direction, Trace Inclusion (All Cell or Specific Cell), and Message Type (recommended value: Default).
View the tracing result.
Save the tracing result.Right-click the trace task and choose Stop from the shortcut menu. If the task status is Finished, click Export to save the tracing result to the PC in .tmf format.
Virtual UE Message TracingIn the tracing navigation tree of U2000, expand the Global node. Double-click LTE Virtual UE Trace to trigger a corresponding tracing task.
Create a tracing task.Double-click LTE Virtual UE Trace. In the displayed LTE Virtual UE Trace dialog box, as shown in the following figure, specify Trace name and User trace ID.
View the tracing result.
Save the tracing result.Right-click the trace task and choose Stop from the shortcut menu. If the task status is Finished, click Export to save the tracing result to the PC in .tmf format.
End-to-End User Tracing (Not Supported By V200R012)Create a tracing task.On the menu bar of the U2000, choose Monitor > Signaling Trace > Signaling Trace Management.
In the tracing navigation tree, expand the LTE/EPC node, and double-click LTE/EPC End-to-End User Trace to trigger a tracing task.
In the LTE/EPC End-to-End User Trace dialog box, enter the trace name, the IMSI number of the user to be traced. By default, the tracing task reference number is randomly allocated. In the NE Settings area, select User-Registered MME.
Select the interfaces to be traced.
View the tracing result.
Save the tracing result.Right-click the tracing task and choose Export from the shortcut menu to export the traced data to the local PC. In the exported data, data starting with USN is traced over standard interfaces on the core network, and data starting with an eNodeB name is traced on standard interfaces of eNodeBs. (Data traced over Uu, S1, and X2 interfaces are saved in this file). If the UE moves between multiple cells managed by the U2000, interface information for each eNodeB is recorded in an independent .tmf file.
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