14.7a Measurements related to CSG/Hybrid cells

25.3313GPPProtocol specificationRadio Resource Control (RRC)Release 17TS

14.7a.1 Intra-frequency measurements for CSG/Hybrid cells

For each cell reported in the IE "Cell measured results" of an intra-frequency Measurement Report, which is also included in the IE "Intra-frequency SI Acquisition" associated with the measurement:

1> if the UE managed to acquire the valid system information of the concerned cell:

2> include the following IEs in the IE "Cell measured results":

3> "Cell Identity" IE.

3> if the concerned cell broadcasts a CSG identity:

4> "CSG Identity" IE.

4> if the concerned cell is CSG member cell:

5> "CSG Member indication" IE and set it to "member";

5> "CSG PLMN Identity" IE of all PLMNs broadcast that fulfil the CSG member cell definition.

The system information of the reported cell(s) can be acquired by the UE without any measurement gaps.

14.7a.2 Inter-frequency measurements for CSG/Hybrid cells

For each cell reported in the IE "Cell measured results" of an inter-frequency Measurement Report, which is also included in the IE "Inter-frequency SI Acquisition" associated with the measurement:

1> if the UE managed to acquire the system information of the concerned cell:

2> include the following IEs in the IE "Cell measured results":

3> "Cell Identity" IE;

3> if the concerned cell broadcasts a CSG identity:

4> "CSG Identity" IE.

4> if the concerned cell is CSG member cell:

5> "CSG Member indication" IE and set it to "member";

5> "CSG PLMN Identity" IE of all PLMNs broadcast that fulfil the CSG member cell definition.

If the UE needs measurement gaps to read the system information on the non-used frequency, the system information of the reported cell can be acquired by the UE via autonomous measurement gaps when the IE "Inter-frequency SI Acquisition" is received by the UE, i.e., UE is allowed to temporarily abort communication with the serving cell to perform SI acquisition within the limits as specified in [19]. UE shall send the measurement report before the maximum provided time specified in IE “Periodical reporting criteria” if the UE is able to acquire SI early.

14.7a.3 CSG Proximity detection

The UE shall:

1> if the IE "UTRA CSG Proximity detection" is present and has the value "enable":

2> enable the proximity detection function of entering or leaving the proximity of UTRA CSG member cell(s) .

1> else:

2> disable the proximity detection function of entering or leaving the proximity of UTRA CSG member cell(s) .

1> if the IE "E-UTRA CSG Proximity detection" is present and has the value "enable":

2> enable the proximity detection function of entering or leaving the proximity of E-UTRA CSG member cell(s) .

1> else:

2> disable the proximity detection function of entering or leaving the proximity of E-UTRA CSG member cell(s) .

14.7a.4 CSG Proximity Indication

If proximity detection function is enabled for a RAT, the UE shall initiate the transmission and set the contents of IE "CSG Proximity Indication" in the MEASUREMENT REPORT message as follows:

1> if the UE is aware that it is in the proximity of one or more CSG member cell(s) on a frequency of the enabled RAT, the UE shall:

2> if the UE has not transmitted a “CSG Proximity Indication" for the RAT and frequency since the enabling of proximity detection function, or

2> if the last “CSG Proximity Indication” transmitted for the concerned RAT and frequency was a leaving indication, and more than 5 s has elapsed since its transmission,

3> set the IE "CSG Proximity Indication" to "entering";

3> set the IE "CSG Frequency info for UTRA" or "CSG Frequency info for E-UTRA " to the frequency of the cell(s) for which the Proximity Indication was triggered.

1> if the UE leaves the proximity of all the CSG member cell(s) on a frequency of the enabled RAT, the UE shall:

2> if the last “CSG Proximity Indication” transmitted for the concerned RAT and frequency was an entering indication, and more than 5 s has elapsed since its transmission,

3> set the IE "CSG Proximity Indication" to "leaving";

3> set the IE "CSG Frequency info for UTRA" or "CSG Frequency info for E-UTRA" to the frequencyof the cell(s) for which the Proximity Indication was triggered.

14.7a.5 E-UTRA measurements for CSG/Hybrid cells

For each cell reported in the IE "E-UTRA measured results" of an E-UTRA inter-RAT Measurement Report, which is also included in the IE "E-UTRA SI Acquisition" associated with the measurement:

1> if the UE acquired the system information of the concerned cell:

2> include the following IEs in the IE "E-UTRA Results for SI Acquisition":

3> "CGI-Info" IE;

3> if the concerned cell broadcasts a CSG identity:

4> "CSG Identity" IE;

4> if the concerned cell is CSG member cell:

5> "CSG Member indication" IE and set it to "member";

5> "Primary PLMN Suitable" if the Primary PLMN Identity meets the CSG member cell definition;

5> "CSG PLMN Identity" IE of all other PLMNs broadcast that fulfil the CSG member cell definition.

If the UE needs measurement gaps to read the system information on the E-UTRA cell, the system information of the reported cell can be acquired by the UE via autonomous measurement gaps when the IE " E-UTRA SI Acquisition" is received by the UE, i.e., UE is allowed to temporarily abort communication with the serving cell to perform SI acquisition within the limits as specified in [74]. UE shall send the measurement report before the maximum provided time specified in IE “Periodical reporting criteria” if the UE is able to acquire SI early.