Methods and apparatuses for event-triggered activation of measurement reporting in wireless communications

1 . A method implemented in a wireless transmit/receive unit (WTRU) for wireless communications, the method comprising:

receiving configuration information indicating 1) a primary synchronization signal (PSS) configuration, 2) a secondary synchronization signal (SSS) configuration, 3) a PSS measurement timing configuration, 4) an SSS measurement timing configuration, and 5) one or more triggering conditions for measurement reporting;

performing measurement for one or more PSSs based on the PSS measurement timing configuration;

transmitting, based on a triggering condition of the one or more triggering conditions being met, a first measurement report for the one or more PSSs using the PSS configuration;

determining, based on the triggering condition being met, that SSS measurement reporting is activated;

performing measurement for one or more SSSs based on the SSS measurement timing configuration; and

transmitting a second measurement report for the one or more SSSs using the SSS configuration and after transmitting the first measurement report.

2 . The method of claim 1 , wherein the SSS measurement reporting being activated comprises activating the SSS measurement timing configuration.

3 . The method of claim 2 , wherein the activating of the SSS measurement timing configuration is associated with an adjustment of a measurement gap.

4 . The method of claim 1 , wherein the triggering condition comprises a measurement value for the one or more PSSs being greater than a threshold.

5 . The method of claim 1 , wherein the PSS measurement timing configuration indicates a first time period for measuring the one or more PSSs, and the SSS measurement timing configuration indicates a second time period for measuring the one or more SSSs.

6 . The method of claim 1 , further comprising, when the SSS measurement reporting is activated, deactivating PSS measurement reporting.

7 . The method of claim 1 , wherein the triggering condition is a first triggering condition, wherein the method further comprising determining that a second triggering condition of the one or more triggering conditions is met, and wherein the second triggering condition comprises a measurement value for the one or more SSSs being less than a threshold.

8 . The method of claim 7 , wherein the second measurement report is transmitted based on the second triggering condition being met.

9 . The method of claim 7 , further comprising determining, based on the second triggering condition being met, that SSS measurement reporting is deactivated after the second measurement report is transmitted.

10 . The method of claim 9 , further comprising, when the SSS measurement reporting is deactivated, activating PSS measurement reporting.

11 . The method of claim 9 , wherein the SSS measurement reporting being deactivated comprises deactivating the SSS measurement timing configuration, and wherein the deactivating of the SSS measurement timing configuration is associated with an adjustment of a measurement gap.

12 . A wireless transmit/receive unit (WTRU) for wireless communications, comprising circuitry, including a transmitter, receiver, a processor and memory, the WTRU configured to:

receive configuration information indicating 1) a primary synchronization signal (PSS) configuration, 2) a secondary synchronization signal (SSS) configuration, 3) a PSS measurement timing configuration, 4) an SSS measurement timing configuration, and 5) one or more triggering conditions for measurement reporting;

perform measurement for one or more PSSs based on the PSS measurement timing configuration;

transmit, based on a triggering condition of the one or more triggering conditions being met, a first measurement report for the one or more PSSs using the PSS configuration;

determine, based on the triggering condition being met, that SSS measurement reporting is activated;

perform measurement for one or more SSSs based on the SSS measurement timing configuration; and

transmit a second measurement report for the one or more SSSs using the SSS configuration and after transmitting the first measurement report.

13 . The WTRU of claim 12 , wherein the WTRU is further configured to, when the SSS measurement reporting is activated, activate the SSS measurement timing configuration.

14 . The WTRU of claim 13 , wherein the activating of the SSS measurement timing configuration is associated with an adjustment of a measurement gap.

15 . The WTRU of claim 12 , wherein the triggering condition comprises a measurement value for the one or more PSSs being greater than a threshold.

16 . The WTRU of claim 12 , wherein the PSS measurement timing configuration indicates a first time period for measuring the one or more PSSs, and the SSS measurement timing configuration indicates a second time period for measuring the one or more SSSs.

17 . The WTRU of claim 12 , wherein the WTRU is further configured to, when the SSS measurement reporting is activated, deactivate PSS measurement reporting.

18 . The WTRU of claim 12 , wherein the triggering condition is a first triggering condition, the WTRU is further configured to determine that a second triggering condition of the one or more triggering conditions is met, and wherein the second triggering condition comprises a measurement value for the one or more SSSs being less than a threshold.

19 . The WTRU of claim 18 , wherein the second measurement report is transmitted based on the second triggering condition being met.

20 . The WTRU of claim 18 , wherein the WTRU is further configured to:

determine, based on the second triggering condition being met, that SSS measurement reporting is deactivated after the second measurement report is transmitted; or

activate PSS measurement reporting when the SSS measurement reporting is deactivated.