9.1.55 ENHANCED MEASUREMENT REPORT

3GPP44.018GSM/EDGE Radio Resource Control (RRC) protocolMobile radio interface Layer 3 specificationRelease 16TS

This message containing measurement results is sent on the SACCH by the mobile to the network. See figure 9.1.55.1.

This message may contain reports on GSM and/or on other Radio Access Technologies. Measurements are defined in 3GPP TS 45.008.

Message type: ENHANCED MEASUREMENT REPORT

Significance: dual

Direction: mobile station to network

<Enhanced Measurement report> ::=

< RR short PD : bit > — See 3GPP TS 24.007

< Message type : bit (5) > –– See 10.4

< Short layer 2 header : bit (2) > –– See 3GPP TS 44.006

< BA_USED : bit >

< 3G_BA_USED : bit >

< BSIC_Seen : bit >

< SCALE : bit >

{ 0 | 1 < Serving cell data : < Serving cell data struct >> }

{ 1 < Repeated Invalid_BSIC_Information : < Repeated Invalid_BSIC_Information struct >> } ** 0

{ 0 | 1 { 0 | 1 < REPORTING_QUANTITY : bit (6) > } ** } — bitmap type reporting

{ null | L bit ** = < no string > — Receiver compatible with earlier release

| H — Additions in Rel-8 :
< BITMAP_LENGTH : bit(7) >

{ 0 | 1 < REPORTING_QUANTITY : bit (6) > } * (val(BITMAP_LENGTH + 1 ) )

{ 0 | 1 < E-UTRAN Measurement Report : < E-UTRAN Measurement Report struct > > }

{ null | L bit ** = < no string > — Receiver compatible with earlier release

| H — Additions in Rel-9 :

{ 0 | 1 < UTRAN CSG Measurement Report : < UTRAN CSG Measurement Report IE > > }

{ null | L bit ** = < no string > — Receiver compatible with earlier release

| H — Additions in Rel-11 :

< SI23_BA_USED : bit

} } }

< spare padding > ;

< Serving cell data struct > ::=

< DTX_USED : bit >

< RXLEV_VAL : bit (6) >

< RX_QUAL_FULL : bit (3) >

< MEAN_BEP : bit (5) >

< CV_BEP : bit (3) >

< NBR_RCVD_BLOCKS : bit (5) > ;

< Repeated Invalid_BSIC_Information struct > ::=

< BCCH-FREQ-NCELL : bit (5) >

< BSIC : bit (6) >
< RXLEV-NCELL : bit (6) > ;

< E-UTRAN Measurement Report struct > ::=

< N_E-UTRAN: bit (2) >

{ < E-UTRAN_FREQUENCY_INDEX : bit (3) >

< CELL IDENTITY : bit (9) >

< REPORTING_QUANTITY : bit (6) > } * (val(N_E-UTRAN + 1 )) ;

Figure 9.1.55.1: Enhanced Measurement Report message content

Table 9.1.55.1: Enhanced Measurement Report information element details.

BA_USED (1 bit field),
The value of the BA-IND field of the neighbour cell description information element or elements defining the BCCH allocation used. Range 0 to 1.

3G_BA_USED (1 bit field)
The value of the 3G-BA-IND field of the neighbour cell description information element or elements defining the 3G and/or E-UTRAN allocation used. Range 0 to 1..

BSIC_Seen (1 bit field)
This parameters indicates if a GSM cell with invalid BSIC and allowed NCC part of BSIC is one of the six strongest, see 3GPP TS 45.008.

Bit
0 No cell with invalid BSIC and allowed NCC part of BSIC is seen
1 One Cell or more with invalid BSIC and allowed NCC part of BSIC is seen

SCALE (1 bit field)
The value of this field is defined in 3GPP TS 45.008.

Serving cell reporting

If this structure is missing, this indicates that no valid measurement exist for the serving cell.

Parameters RXLEV_VAL (6 bits), RX_QUAL_FULL (3 bits), MEAN_BEP (5 bits), CV_BEP (3 bits), NBR_RCVD_BLOCKS (5 bits) are defined in 3GPP TS 45.008.

DTX_USED (1 bit field)
This bit indicates whether or not the mobile station used DTX during the previous measurement period.

0 DTX was not used
1 DTX was used.

Neighbour cell reporting

Repeated Invalid BSIC
This structure contains the report of cells with invalid BSIC.
BCCH-FREQ-NCELL (5 bits). This field represents the index of the BA (list), see 10.5.2.20.
BSIC (6 bits). Base station identity code of the corresponding index in the BA (list).
RXLEV (6 bits). GSM reporting quantity, see 3GPP TS 45.008.

Bitmap type reporting:
This structure contains the report of cells with valid BSIC.
Each bit of the bitmap points to the corresponding index of the Neighbour Cell list defined in sub-clause 3.4.1.2.1.3 ‘Deriving the Neighbour Cell list from the GSM Neighbour Cell list and the 3G Neighbour Cell list’.

If this structure is present and more bits than needed are available at the end of the message, the MS shall set the value of the redundant bitmap positions to ‘0’.

At least 96 neighour cell entries shall be encoded in the bitmap.

If this structure is present, some remaining bits indicating no report at the end of the message may be omitted if these bits do not fit into the message. This shall not lead to an error in the receiver of that message.

If E-UTRAN neighbour cells are to be reported, then this structure shall be omitted and replaced by the bitmap reporting structure in the release-8 extension of this message.

REPORTING_QUANTITY (6 bits):
Measurement quantities are defined in 3GPP TS 45.008.

E-UTRAN Neighbour cell reporting

BITMAP_LENGTH (7 bit field)

1+val(BITMAP_LENGTH) indicates the number of entries in the reporting bitmap.

Bitmap type reporting:
This structure contains the report of cells with valid BSIC.
Each bit of the bitmap points to the corresponding index of the Neighbour Cell list defined in sub-clause 5.6.3.3 ("Deriving the Neighbour Cell list from the GSM Neighbour Cell list and the 3G Neighbour Cell list").

REPORTING_QUANTITY (6 bits):
Measurement quantities are defined in 3GPP TS 45.008.

E-UTRAN Measurements
Measurement reporting for E-UTRAN Cells is defined in 3GPP TS 45.008.

E-UTRAN_FREQUENCY_INDEX (3 bit field)
This field contains the index of the frequency of the cell for which the measurement is reported. This field is defined in sub-clause 9.1.54.

CELL_IDENTITY (9 bit field)
This field contains the physical layer cell identity (as defined in 3GPP TS 36.211) of the cell being reported.

REPORTING_QUANTITY (6 bit field)
This is the reporting quantity for the E-UTRAN cell identified by the E-UTRAN frequency and physical layer cell identity. The quantities are defined in 3GPP TS 45.008 for the respective Radio Access Technology.

UTRAN CSG Measurement Report
This information element contains the measurement report for a UTRAN CSG cell or detected hybrid cell. A UTRAN CSG cell or detected hybrid cell is identified by the Cell Identity and optionally the PLMN-ID.

This information element is defined as the UTRAN CSG Measurement Report IE described in 3GPP TS 44.060.

SI23_BA_USED (1 bit field)
This field contains the value of the SI 23_BA_IND field in SYSTEM INFORMATION TYPE 23 message defining the E-UTRAN allocation used. In the case SYSTEM INFORMATION TYPE 23 message is not broadcast in the cell or if the mobile station does not support network sharing, this field shall be set to 0. Range 0 to 1