Decode LTE RRC UL-DCCH-Message Failed.

[kevinchychen]

Hi, @all

Has anyone encountered the decoding failed as following? Can someone share your idea with me? or please suggest that which code I should trace?

- The content in file "1234.dat" was "0x082322340E020006845224" in bytes array.

• [xxxxxx@rhe67xx EUTRA.RRC]$ ./rrc-dump -p UL-DCCH-Message 1234.dat -otext -dd
• AD: Processing 1234.dat
• AD: Decoding 11 bytes
• Decoding UL-DCCH-Message as SEQUENCE (UPER) (constr_SEQUENCE.c:1050)
• Decoding member message in UL-DCCH-Message (constr_SEQUENCE.c:1120)
• CHOICE UL-DCCH-MessageType got index 0 in range 1 (constr_CHOICE.c:864)
• Discovered CHOICE UL-DCCH-MessageType encodes c1 (constr_CHOICE.c:892)
• CHOICE c1 got index 1 in range 4 (constr_CHOICE.c:864)
• Discovered CHOICE c1 encodes measurementReport (constr_CHOICE.c:892)
• Decoding MeasurementReport as SEQUENCE (UPER) (constr_SEQUENCE.c:1050)
• Decoding member criticalExtensions in MeasurementReport (constr_SEQUENCE.c:1120)
• CHOICE criticalExtensions got index 0 in range 1 (constr_CHOICE.c:864)
• Discovered CHOICE criticalExtensions encodes c1 (constr_CHOICE.c:892)
• CHOICE c1 got index 0 in range 3 (constr_CHOICE.c:864)
• Discovered CHOICE c1 encodes measurementReport-r8 (constr_CHOICE.c:892)
• Decoding MeasurementReport-r8-IEs as SEQUENCE (UPER) (constr_SEQUENCE.c:1050)
• Read in presence bitmap for MeasurementReport-r8-IEs of 1 bits (0..) (constr_SEQUENCE.c:1073)
• Decoding member measResults in MeasurementReport-r8-IEs (constr_SEQUENCE.c:1120)
• Decoding MeasResults as SEQUENCE (UPER) (constr_SEQUENCE.c:1050)
• Read in presence bitmap for MeasResults of 1 bits (0..) (constr_SEQUENCE.c:1073)
• Decoding member measId in MeasResults (constr_SEQUENCE.c:1120)
• Decoding NativeInteger MeasId (UPER) (NativeInteger.c:246)
• Integer with range 5 bits (INTEGER.c:601)
• Got value 6 + low 1 (INTEGER.c:622)
• NativeInteger MeasId got value 7 (NativeInteger.c:263)
• Freeing INTEGER as a primitive type (asn_codecs_prim.c:125)
• Decoding member measResultPCell in MeasResults (constr_SEQUENCE.c:1120)
• Decoding measResultPCell as SEQUENCE (UPER) (constr_SEQUENCE.c:1050)
• Decoding member rsrpResult in measResultPCell (constr_SEQUENCE.c:1120)
• Decoding NativeInteger RSRP-Range (UPER) (NativeInteger.c:246)
• Integer with range 7 bits (INTEGER.c:601)
• Got value 34 + low 0 (INTEGER.c:622)
• NativeInteger RSRP-Range got value 34 (NativeInteger.c:263)
• Freeing INTEGER as a primitive type (asn_codecs_prim.c:125)
• Decoding member rsrqResult in measResultPCell (constr_SEQUENCE.c:1120)
• Decoding NativeInteger RSRQ-Range (UPER) (NativeInteger.c:246)
• Integer with range 6 bits (INTEGER.c:601)
• Got value 13 + low 0 (INTEGER.c:622)
• NativeInteger RSRQ-Range got value 13 (NativeInteger.c:263)
• Freeing INTEGER as a primitive type (asn_codecs_prim.c:125)
• Member MeasResults->measResultNeighCells is optional, p=0 (1->1) (constr_SEQUENCE.c:1102)
• Getting normally small length (per_support.c:199)
• l=2 (per_support.c:204)
• Extensions 2 present in MeasResults (constr_SEQUENCE.c:1145)
• Read in extensions bitmap for MeasResults of 2 bits (c0..) (constr_SEQUENCE.c:1158)
• Decoding member measResultForECID-r9 in MeasResults (nil) (constr_SEQUENCE.c:1186)
• Getting open type MeasResultForECID-r9... (per_opentype.c:70)
• Getting open type MeasResultForECID-r9 encoded in 1 bytes (per_opentype.c:96)
• Decoding MeasResultForECID-r9 as SEQUENCE (UPER) (constr_SEQUENCE.c:1050)
• Decoding member ue-RxTxTimeDiffResult-r9 in MeasResultForECID-r9 (constr_SEQUENCE.c:1120)
• Decoding NativeInteger INTEGER (UPER) (NativeInteger.c:246)
• Integer with range 12 bits (INTEGER.c:601)
• Freeing INTEGER as a primitive type (asn_codecs_prim.c:125)
• Failed decode ue-RxTxTimeDiffResult-r9 in MeasResultForECID-r9 (constr_SEQUENCE.c:1125)
• Failed decode measResults in MeasurementReport-r8-IEs (constr_SEQUENCE.c:1125)
• Failed to decode measurementReport-r8 in c1 (CHOICE) 2 (constr_CHOICE.c:904)
• Failed to decode c1 in criticalExtensions (CHOICE) 2 (constr_CHOICE.c:904)
• Failed decode criticalExtensions in MeasurementReport (constr_SEQUENCE.c:1125)
• Failed to decode measurementReport in c1 (CHOICE) 2 (constr_CHOICE.c:904)
• Failed to decode c1 in UL-DCCH-MessageType (CHOICE) 2 (constr_CHOICE.c:904)
• Failed decode message in UL-DCCH-Message (constr_SEQUENCE.c:1125)
• AD: decode(0) consumed 0+0b (11), code 2
• AD: Clean up partially decoded structure
• Freeing UL-DCCH-Message as SEQUENCE (constr_SEQUENCE.c:957)
• Freeing UL-DCCH-MessageType as CHOICE (constr_CHOICE.c:1041)
• Freeing c1 as CHOICE (constr_CHOICE.c:1041)
• Freeing MeasurementReport as SEQUENCE (constr_SEQUENCE.c:957)
• Freeing criticalExtensions as CHOICE (constr_CHOICE.c:1041)
• Freeing c1 as CHOICE (constr_CHOICE.c:1041)
• Freeing MeasurementReport-r8-IEs as SEQUENCE (constr_SEQUENCE.c:957)
• Freeing MeasResults as SEQUENCE (constr_SEQUENCE.c:957)
• Freeing MeasId as INTEGER (1, 0x1192280, Native) (NativeInteger.c:326)
• Freeing measResultPCell as SEQUENCE (constr_SEQUENCE.c:957)
• Freeing RSRP-Range as INTEGER (1, 0x1192288, Native) (NativeInteger.c:326)
• Freeing RSRQ-Range as INTEGER (1, 0x1192290, Native) (NativeInteger.c:326)
• Freeing MeasResultForECID-r9 as SEQUENCE (constr_SEQUENCE.c:957)
• Freeing INTEGER as INTEGER (1, 0x1192470, Native) (NativeInteger.c:326)
• Freeing BIT STRING as OCTET STRING (OCTET_STRING.c:1725)
• AD: ofp 1, no=0, oo=0, dbl=0
• 1234.dat: Decode failed past byte 0: Input processing error
• [xxxxxx@rhe67xx EUTRA.RRC]$

I try to decode the message from on-line tools(http://www.marben-products.com/asn.1/services/decoder-asn1-lte.html), and it was decoded as following:

<UL-DCCH-Message>
  <message>
    <c1>
      <measurementReport>
        <criticalExtensions>
          <c1>
            <measurementReport-r8>
              <measResults>
                <measId>7</measId>
                <measResultPCell>
                  <rsrpResult>34</rsrpResult>
                  <rsrqResult>13</rsrqResult>
                </measResultPCell>
                <measResultServFreqList-r10>
                  <MeasResultServFreq-r10>
                    <servFreqId-r10>1</servFreqId-r10>
                    <measResultSCell-r10>
                      <rsrpResultSCell-r10>36</rsrpResultSCell-r10>
                      <rsrqResultSCell-r10>18</rsrqResultSCell-r10>
                    </measResultSCell-r10>
                  </MeasResultServFreq-r10>
                </measResultServFreqList-r10>
              </measResults>
            </measurementReport-r8>
          </c1>
        </criticalExtensions>
      </measurementReport>
    </c1>
  </message>
</UL-DCCH-Message>

Please kindly give me some idea about this. Appreciate for your valuable suggestion.

Best regards, Kevin

[zaheermot]

I'm facing a similar problem, were you able to solve it? Appreciate any response.