Measurement reporting

1. A method, comprising:

receiving, by a user equipment, from a base station, at least one RRCConnectionRelease message comprising one or more measurements to be performed during an idle/power saving mode;

transmitting, by the user equipment while operating in the idle/power saving mode, to the base station, at least one RRCConnectionSetupComplete message comprising at least one reporting indication indicating that at least one measurement of the one or more measurements is available and obsolete;

receiving, by the user equipment while operating in the idle/power saving mode, from the base station, at least one request for at least one of: the at least one available and obsolete measurement, or a time that the at least one available and obsolete measurement was performed;

transmitting, by the user equipment while operating in the idle/power saving mode, to the base station, at least one of: the at least one available and obsolete measurement, or the time that the at least one available and obsolete measurement was performed;

receiving, by the user equipment while operating in the idle/power saving mode, from the base station, at least one RRCConnectionReconfiguration message; and

transmitting, by the user equipment while operating in the idle mode, to the base station, at least one RRCConnectionReconfigurationComplete message.

2. The method according to claim 1 , wherein the at least one reporting indication comprises at least one of:

a first indication indicating that the user equipment is able to transmit the at least one available and obsolete measurement for the base station to configure/aggregate a cell on the inter-frequency carrier using carrier aggregation or dual connectivity:

a second indication indicating that the at least one available and obsolete measurement is lower than at least one quality threshold;

a third indication indicating that no small cells were detected; or

a fourth indication indicating that at least one previous secondary cell configuration is still valid.

3. The method according to claim 1 , further comprising:

entering, by the user equipment, a RRC CONNECTED mode.

4. An apparatus, comprising:

at least one processor; and

at least one memory including computer program code, the at least one memory and computer program code being configured, with the at least one processor, to cause the apparatus to perform:

receiving, from a base station, at least one RRCConnectionRelease message comprising one or more measurements to be performed during an idle/power saving mode;

transmitting, while operating in the idle/power saving mode, to the base station, at least one RRCConnectionSetupComplete message comprising at least one reporting indication indicating that at least one measurement of the one or more measurements is available and obsolete;

receiving, while operating in the idle/power saving mode, from the base station, at least one request for at least one of: the at least one available and obsolete measurement, or a time that the at least one available and obsolete measurement was performed;

transmitting, while operating in the idle/power saving mode, to the base station, at least one of: the at least one available and obsolete measurement, or the time that the at least one available and obsolete measurement was performed;

receiving, while operating in the idle/power saving mode, from the base station, at least one RRCConnectionReconfiguration message; and

transmitting, while operating in the idle mode, to the base station, at least one RRCConnectionReconfigurationComplete message.

5. A computer program embodied on a non-transitory computer-readable medium, said computer program comprising instructions which, when executed in hardware, causes the hardware to perform the method according to claim 1 .

6. The apparatus according to claim 4 , wherein the at least one reporting indication comprises at least one of:

a first indication indicating that the apparatus is able to transmit the at least one available and obsolete measurement for the base station to configure/aggregate a cell on the inter-frequency carrier using carrier aggregation or dual connectivity;

a second indication indicating that the at least one available and obsolete measurement is lower than at least one quality threshold;

a third indication indicating that no small cells were detected; or

a fourth indication indicating that at least one previous secondary cell configuration is still valid.