LTE Measurement Monitor and Trace (MMT) Application.

LTE Measurement Monitor and Trace (MMT) Application

Agenda

To Do

Measurement, Monitor and Trace Application

MMT provides: Detailed low-level debug

• L1 and 2 statistics measurements, Phy, MAC HARQ, Throughput, CQI, RLC, PDCP etc

• Monitor of all power levels and timing errors• Runtime, real time MSC logging of all data and primitives• Runtime control of trace logging• Post process of all L1 information including DL/UL DCIs, PUCCH SRs,

CQI, PMI,RI etc.

Measurement window

Monitor Window

Trace Window

Trace post process tool

Post process of binary log for detailed DL and UL analysis

Analysis contains very detailed information on a TTI-TTI basis

How to get the elementary information from MMT trace

1. How to get the elementary information

Using the LTE-PHY-DATA-REQ-OPT Window to get the almost elementary information.

Refer to the “Control Software Operation Guide” to get the detailed explanation.

“MD8430A Easy-to-understand Signalling Tester (Control Software Operation Guide)” – Appendix A Option Information section

Using the PRIM_HEAD Window to get the activation time of primitive .

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LTE-PHY-DATA-REQ-OPT Window

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Parameters

LTE-PHY-DATA-REQ-OPT ParameterThe elem

entary information of low

lay

Parameters InformationPDU_Type PDU typeActTime Activation TimeA Transport block size [bits]Qm Modulation schemeRV Redundancy VersionUEIDType RNTI TypeUEID RNTIDCI_Format DCI FormatIsTTIBundling Is this part of a TTI bundlingIsRAProcedure Is this part of a RA ProcedureNumOfSoftChannelBits Number of soft channel bitsNumOfLayers Number of transmission LayersNumOfCWs Number of code wordsTBNumber Transport block numberCWNumber Code word numberCodewordSwap Codeword swap flagMBSFN_AreaNo MBSFN Area numberMBSFN_AreaId MBSFN Area IDPmchNo PMCH- InfoList numberCCEIndex CCE indexMCS Modulation and coding schemeRB_START Lowest RB indexCyclicShift Cyclic shift for DM RSCQIRequest CQI RequestHARQProcessNo HARQ process numberCURRENT_TX_NB Retransmission counterNumOfSrsSym Number of SRS Symbol AsNewTransmission Treat as new transmission?DataBits[0] Number of data coded bitsDataBits[1] Number of data coded bitsAckNackBits ACK/ NACK coded bits RIBits Rank Indication coded bitsCQIBits[0] Channel quality coded bitsCQIBits[1] Channel quality coded bits

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Back

Appendix A Option Information sectionof Control Software Operation Guide

Appendix A Option Information section

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MD8430A_Control_Software_Operation_Guide_e_23.pdf

PRIM_HEAD Window

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Value(Hex) Activation TimeFFFFFFFF NowXXXXYYYY XXXX SFN or Any

YYYY Subframe

Set “-”

Part 2 How to get the advanced information from MMT trace

2.1 Enable/display the advanced information

Set “Capture Filter Switch” and “Display Filter Switch” to OFF as below for enabling/displaying the advanced information .

The above setting should be applied after staring scenario,because of the setting will be neglected , if set it before starting scenario.

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2.2 Use the Trace log conversion program to create the CSV file format.

The Trace log conversion program converts the measurement result for the physical channel in the Trace log file saved in binary format to CSV files format as below.

Drag and drop the saved trace log file onto the shortcut Trace Converter in C:\MX843010\Trace. .

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2.3 Get the advanced information from the created CSV files

The following CSV files will be created by conversion program. File Name

PDSCH information file X_BTS_PDSCH_X.csvPUSCH information file X_BTS_PUSCH_X.csvDownlink Report information file X_DL_Report_Meas_X.csvUplink Report information file X_UL_Report_Meas_X.csvMAC DL_SCH information file X_BTS_MAC_DL_SCH_X.csvMAC UL_SCH information file X_BTS_ MAC_UL_SCH _X.csvMAC RAR information file X_BTS_ MAC_RAR_X.csv

The almost advanced information are included in the Downlink/ Uplink Report information file.

Refer to the “Control Software Operation Guide” to get the detailed explanation.

“MD8430A Easy-to-understand Signalling Tester (Control Software Operation Guide)” - Offline Measurement Using Trace Log section

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Offline Measurement Using Trace Log sectionof Control Software Operation Guide

Offline Measurement Using Trace Log section

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MD8430A_Control_Software_Operation_Guide_e_23.pdf

Part 3 Practice

3.Practice

UE eNBDCI & DL Message

SR

UL grant

HARQ-ACK

UL Message

HARQ-ACK

How to get DCI ?

How to get UL HARQ Feedback ?

How to get SR?

How to get UL grant ?

How to get DL HARQ Feedback (HI)?

Generally, We only can catch some limited information from MMT trace .

However, that is not enough for us to debug or further confirm eNB/UE behavior, So, We should get more information like DCI, UCI and so on.

That is not enough !

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3.1 How to get DCI

Open the “ ” file and find DCI according [SFN, Subframe] and [Progress Time] as below.

Get [SFN, Subframe] and [Progress Time] of target from trace.

-Apply the excel filtering at the 1st row of data.

-Set the “System Frame Number” column to “363” , “Sub Frame Number” column to “1” .

-Determine the row by “24.1”, if multiple rows have been filtered.

-Find the DCI information at “DCI ” column.

UE eNBDCI & DL Message

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3.2 How to get UL HARQ Feedback

Get [SFN, Subframe] and [Progress Time] of target from trace. Calculate Timing of the UL HARQ Feedback by [SFN, Subframe] as below. -FDD [SFN, Subframe] + 4 subframe -TDD [SFN, Subframe] + x subframe, x is depend on TDD UL-DL configuration (Refer to TS.36.213 -7.3)


-Set the “System Frame Number of UCI ” column to “363” the “Sub Frame Number of UCI ” column to “1+4 = 5 ” .


-Find UL HARQ Feedback at the “HARQ-AN of Received value of DCI ” column.

UE eNB

DCI & DL Message

ACK

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Open the “ ” file and find DCI according calculated values and [Progress Time] as below.

Open the “ ” file and find DCI according [SFN] and [Progress Time] as below.

3.3 How to get SR

Get [SFN] and [Progress Time] of target from trace.


- Set the “System Frame Number of UCI ” column to the value less than or equal to “366”


-Set “1” at “SR of Received value of DCI ” column.

UE eNB

DCI & DL Message

ACK

SR

UL Message

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How to calculate SR Timing

0mod2/10,

yPeriodicitSROFFSETsf

SRNnn

SFN[0-1023] Slot index [0-19]

TS36.213 -10.1rrcConnectionSetup →Scheduling RequestConfig + sr-ConfigurationIndex = 30

365

15 20

5

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3.4 How to get UL grant





Calculate Timing of the UL grant by [SFN, Subframe] as below. -FDD [SFN, Subframe] - 4 subframe -TDD [SFN, Subframe] - x subframe, x is depend on TDD UL-DL configuration (Refer to Table 8-2 of TS36.213)

UE eNB

DCI & DL Message

ACK

SR

UL Message

UL grant

-Set the “System Frame Number” column to “365” , the “Sub Frame Number” column to “9” .

-Find the UL grant at “DCI ” column.

-Set the “DCI Format” column to “DCI FORMAT_0”

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3.5 How to get DL HARQ Feedback (HI)




Calculate Timing of the UL grant by [SFN, Subframe] as below. -FDD [SFN, Subframe] + 4 subframe -TDD [SFN, Subframe] + x subframe, x is depend on TDD UL-DL configuration (Refer to TS36.213 - 9.1.2 )

-Set the “System Frame Number” column to “366” , the “Sub Frame Number” column to “3+4=7” .

-Find the DL HARQ Feedback at the “HARQ Indicator of HI” column.

UE eNB

DCI & DL Message

ACK

SR

UL Message

UL grant

ACK(HI)

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Add trace converter GUI

LTE Measurement Monitor and Trace (MMT) Application.

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