8.5.23 Measured results on RACH

25.3313GPPProtocol specificationRadio Resource Control (RRC)Release 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

When transmitting an uplink RRC message and System Information Block type 11, System Information Block type 11bis, System Information Block type 11ter and System Information Block type 12, if transmitted, have been received, the UE shall:

1> if the uplink RRC message is an RRC CONNECTION REQUEST message:

2> if the IE "Intra-frequency reporting quantity for RACH reporting" and the IE "Maximum number of reported cells on RACH" are included in System Information Block type 11:

2> if the IE "Inter-frequency RACH reporting information" is included in System Information Block type 11:

3> if, at the time the message is to be sent, valid measurements are available; and

3> there is one or more cells for which the quantity, indicated by the IE "Reporting quantity" in the IE "Inter-frequency RACH reporting information”, exceeds the threshold specified by the IE "Inter-frequency RACH reporting threshold":

4> include a measurement report in the IE "Measured results on RACH";

4> include the cells for which the quantity, indicated by the IE "Reporting quantity" in the IE "Inter-frequency RACH reporting information”, exceeds the threshold specified by the IE "Inter-frequency RACH reporting threshold";

4> set the IE "Inter-frequency cell indication- SIB11" to the following value: Value_Tag MOD 2, with Value_Tag corresponding to the value tag of System Information Block Type 11;

4> set the IE "Inter-frequency cell indication- SIB12" to any value.

2> for FDD, if System Information Block type 19 has been received and if the IE "E-UTRA frequency RACH reporting information" is included in System Information Block type 19; and

2> if the UE supports E-UTRA RACH reporting:

3> if, at the time the message is to be sent, valid measurements are available; and

3> there is one or more cells for which the Physical layer Cell Identity is not included in the exclude-list of whose frequency and the quantity, indicated by the IE "E-UTRA frequency RACH Reporting quantity" in the IE "E-UTRA frequency RACH reporting information", exceeds the threshold specified by the IE "E-UTRA frequency RACH reporting threshold" according to the criteria specified in subclause 10.3.7.45:

4> include a measurement report in the IE "Measured results on RACH";

4> set the value of the IE "E-UTRA frequency indicator";

4> set the IE "E-UTRA frequency indication-SIB19" to the following value: Value_Tag MOD 2, with Value_Tag corresponding to the value tag of System Information Block Type 19.

1> for any other uplink RRC message which optionally includes the IE "Measured results on RACH":

2> if the IE "Intra-frequency reporting quantity for RACH reporting" and the IE "Maximum number of reported cells on RACH" are included in System Information Block type 12 (or "System Information Block Type 11", if these IEs are not included in the broadcast "System Information Block Type 12" or "System Information Block Type 12" is not being broadcast).

3> include a measurement report in the IE "Measured results on RACH", as specified in the IE "Intra-frequency reporting quantity for RACH reporting" and the IE "Maximum number of reported cells on RACH" in System Information Block type 12 (or "System Information Block Type 11" if these IEs are not included in the broadcast "System Information Block Type 12" or "System Information Block Type 12" is not being broadcast).

2> if the IE "Inter-frequency RACH reporting information" is included in "System Information Block type 12" (or "System Information Block Type 11" if this IE is not included in the "System Information Block Type 12" or if "System Information Block Type 12" is not being broadcast):

3> if, at the time the message is to be sent, valid measurements are available; and

4> include a measurement report in the IE "Measured results on RACH";

4> include the cells for which the quantity, indicated by the IE "Reporting quantity" in the IE "Inter-frequency RACH reporting information", exceeds the threshold specified by the IE "Inter-frequency RACH reporting threshold";

4> set the IE "Inter-frequency cell indication- SIB11" to the following value: Value_Tag MOD 2, with Value_Tag corresponding to the value tag of System Information Block Type 11;

4> if "System Information Block Type 12" is being broadcast:

5> set the IE "Inter-frequency cell indication- SIB12" to the following value: Value_Tag MOD 2, with Value_Tag corresponding to the value tag of System Information Block Type 12.

4> else:

5> set the IE "Inter-frequency cell indication- SIB12" to any value.

2> for FDD, if System Information Block type 19 has been received and if the IE "E-UTRA frequency RACH reporting information" is included in System Information Block type 19; and

2> if the UE supports E-UTRA RACH reporting:

3> if, at the time the message is to be sent, E-UTRA measurement for CELL_FACH is not configured; and

3> if, at the time the message is to be sent, valid measurements are available; and

4> include a measurement report in the IE "Measured results on RACH";

4> set the value of the IE "E-UTRA frequency indicator";

4> set the IE "E-UTRA frequency indication-SIB19" to the following value: Value_Tag MOD 2, with Value_Tag corresponding to the value tag of System Information Block Type 19.

1> include in the IE "Measured results on RACH" all requested reporting quantities for cells for which measurements are reported.

NOTE: The UE only includes measurement results for neighbour cells for which valid measurements are available at the time the message is sent. At cell access following selection or reselection to a cell, the UE may not have had sufficient time to obtain valid measurement results for neighbour cells.

1> for messages transmitted on CCCH, take care that the maximum allowed message size is not exceeded when forming the IE "Measured results on RACH", i.e. limit the number of included neighbour cells or if required omit the IE "Measured results on RACH" altogether. When limiting the number of included neighbouring cells, for UE’s not supporting E-UTRA RACH reporting, the number of inter-frequency cells should be limited first i.e. inter-frequency cells should be omitted before limiting the number of intra- frequency cells. For UE’s supporting E-UTRA RACH reporting, when limiting the number of included neighbouring cells:

2> if the IE "RACH reporting priority" is not present:

3> E-UTRA measurements shall be omitted first, followed by limiting the number of inter-frequency cells, before limiting the number of intra-frequency cells. Measurement result for the current cell shall be omitted last.

2> if the IE "RACH reporting prirority" is present and set to "IntraEUTRAInter":

3> the number of inter-frequency cells shall be limited first, followed by omitting E-UTRA measurements, before limiting the number of intra-frequency cells. Measurement result for the current cell shall be omitted last.

2> if the IE "RACH reporting priority" is present and set to "InterEUTRAIntra":

3> the number of intra-frequency cells shall be limited first, followed by omitting E-UTRA measurements, before limiting the number of inter-frequency cells. Measurement result for the current cell shall be omitted last.

2> if the IE "RACH reporting priority" is present and set to "InterIntraEUTRA":

3> E-UTRA measurements shall be omitted first, followed by limiting the number of intra-frequency cells, before limiting the number of inter-frequency cells. Measurement result for the current cell shall be omitted last.

2> if the IE "RACH reporting priority" is present and set to "EUTRAIntraInter":

3> the number of inter-frequency cells shall be limited first, followed by limiting the number of intra- frequency cells, before omitting E-UTRA measurements. Measurement result for the current cell shall be omitted last.

2> if the IE "RACH reporting priority" is present and set to "EUTRAInterIntra":

3> the number of intra-frequency cells shall be limited first, followed by limiting the number of inter- frequency cells, before omitting E-UTRA measurements. Measurement result for the current cell shall be omitted last.

When transmitting an uplink RRC message and the System Information Block type 11, System Information Block type 11bis, System Information Block type 11ter and System Information Block type 12, if transmitted, have not been received, the UE shall:

1> for any uplink RRC message which optionally includes the IE "Measured results on RACH", include a measurement report in the IE "Measured results on RACH" according to the following rules:

2> if the IE "Intra-frequency reporting quantity SIB3" was not present in System Information Block type 3:

3> include a measurement report for the serving cell using CPICH RSCP as a measurement quantity;

3> include measurement reports for cells on the used frequency for which measured results are available, using CPICH RSCP as measurement quantity for each cell;

3> omit the IE "Measurement results for monitored cells on non-used frequencies";

3> omit the IE "Measurement results for E-UTRA frequencies".

2> if the IE "Intra-frequency reporting quantity SIB3" was present in System Information Block type 3:

3> include a measurement report for the serving cell using as a measurement quantity given in IE "Intra-frequency reporting quantity SIB3";

3> include measurement reports for cells on the used frequency for which measured results are available, using as a measurement quantity given in IE "Intra-frequency reporting quantity SIB3" for each cell;

3> omit the IE "Measurement results for monitored cells on non-used frequencies";

3> omit the IE "Measurement results for E-UTRA frequencies".

2> for TDD, include measurement reports using the measurement quantities specified in the IE "Reporting quantity list".

If the IE "Measured results on RACH" is present in the message, the UTRAN should extract the contents to be used for radio resource control.