Suspended secondary cell group (SCG) state relaxed measurements

1 . A baseband processor of a user equipment (UE), comprising:

a memory interface; and

processing circuitry communicatively coupled to the memory interface that perform operations configured to:

while in a dual connectivity (DC) mode in a connected state with a master node (MN) associated with a master cell group (MCG) and in a connected state with a secondary node (SN) associated with a secondary cell group (SCG) comprising a primary secondary cell (PSCell), wherein the UE is configured with MN neighbor cells and SN neighbor cells:

receive a signaling comprising a PSCell measurement cycle (MeasCyclePSCell) defining a measurement cycle period of the PSCell, and an indication to enter a suspended state for the secondary cell group (SCG);

in response to the signaling enter the suspended state for the SCG;

increase the received MeasCyclePSCell by applying a PSCell relaxation factor;

while in the suspended state for the SCG;

maintain a radio resource management (RRM) measurement configuration for the MN neighbor cells;

perform relaxed measurements on the PSCell over the MeasCyclePSCell that is increased by the PSCell relaxation factor;

perform RRM measurements on the MN neighbor cells during the suspended state;

skip RRM measurements on the SN neighbor cells during the suspended state; and

generate a measurement report comprising a one or more measurement results from the relaxed measurements and the RRM measurements.

2 . The baseband processor of claim 1 , wherein the operations further comprise a primary discontinuous reception (DRX) configuration for the MCG and a secondary DRX configuration for the SCG that is different than the primary DRX configuration,

after entering the suspended state for the SCG, the operations further comprise maintaining the secondary DRX configuration for the PSCell;

determining a layer 3 relaxed measurement period based on the secondary DRX configuration; and

the operations further comprise performing the relaxed measurements on the PSCell based on the determined layer 3 relaxed measurement period.

3 . The baseband processor of claim 1 , wherein the operations further comprise a measurement object (MeasObject) that includes the MeasCyclePSCell for the SCG suspend state.

4 . The baseband processor of claim 1 , wherein the relaxed measurements are radio link monitoring (RLM) measurements; and

the measurement report comprises a SCG radio link failure (RLF) report.

5 . The baseband processor of claim 1 , wherein the operations further comprise performing radio link monitoring (RLM) measurements on the PSCell, and after entering the suspended state for the SCG, the operations further comprise skipping RLM measurements on the PSCell.

6 . The baseband processor of claim 1 , wherein the relaxed measurements are RRM measurements and the SCG further comprises one or more secondary cells (SCells); and

after entering the suspended state for the SCG, the operations further comprise

canceling the RRM measurements on the one or more SCells.

7 . The baseband processor of claim 1 , wherein the relaxed measurements are RRM measurements, the SCG further comprises one or more secondary cells (SCells), and the operations further comprise a measurement object (MeasObject) that includes a measurement cycle (MeasCycleSCell) of the one or more SCell; and

after entering the suspended state for the SCG, the operations further comprise,

performing the RRM measurements on the one or more SCells according to the MeasCycleSCell and a SCell relaxation factor.

8 . The baseband processor of claim 7 , wherein the operations further comprise a primary discontinuous reception (DRX) configuration for the MCG and a secondary DRX configuration for the SCG that is different than the primary DRX configuration;

wherein the secondary DRX configuration has a first cycle period and the MeasCycleSCell has a second cycle period;

the operations further select either the secondary DRX configuration or the MeasCycleSCell according to which of the first and second cycle periods has a greater cycle period; and

the RRM measurements are performed on the one or more SCells according to the selection.

9 . A non-transitory machine-readable medium comprising instructions that, when executed, cause a User Equipment (UE) to:

while in a dual connectivity (DC) mode in a connected state with a master node (MN) associated with a master cell group (MCG) and in a connected state with a secondary node (SN) associated with a secondary cell group (SCG) comprising a primary secondary cell (PSCell), wherein the UE is configured with MN neighbor cells and SN neighbor cells:

receive a PSCell measurement cycle (MeasCyclePSCell) defining a measurement cycle period of the PSCell, and an indication to enter a suspended state associated with the secondary cell group (SCG);

in response to the indication, enter the suspended state associated with the SCG;

increase the received MeasCyclePSCell by applying a PSCell relaxation factor;

while in the suspended state:

maintain a radio resource management (RRM) measurement configuration for the MN neighbor cells;

perform relaxed measurements on the PSCell over the MeasCyclePSCell that is increased by the PSCell relaxation factor;

perform RRM measurements on the MN neighbor cells during the suspended state;

skip RRM measurements on the SN neighbor cells during the suspended state; and

generate a measurement report comprising a one or more measurement results from the relaxed measurements and the RRM measurements.

10 . The non-transitory machine-readable medium of claim 9 , wherein the SCG further comprises one or more secondary cells (SCells); and

after entering the suspended state for the SCG, the instructions, when executed, further cause the UE to,

cancel RRM measurements on the one or more SCells.

11 . The non-transitory machine-readable medium of claim 9 , wherein the SCG further comprises one or more secondary cells (SCells), and the instructions further comprise a measurement object (MeasObject) that includes a measurement cycle (MeasCycleSCell) of the one or more SCell; and

after entering the suspended state for the SCG, the instructions, when executed, further cause the UE to;

perform RRM measurements on the one or more SCells according to the MeasCycleSCell and a SCell relaxation factor.

12 . The non-transitory machine-readable medium of claim 11 , wherein the instructions further comprise a primary discontinuous reception (DRX) configuration for the MCG and a secondary DRX configuration for the SCG that is different than the primary DRX configuration;

wherein the secondary DRX configuration has a first cycle period and the MeasCycleSCell has a second cycle period,

the instructions, when executed, further cause the UE to select either the secondary DRX configuration or the MeasCycleSCell according to which of the first and second cycle periods has a greater cycle period; and

the RRM measurements are performed on the one or more SCells according to the selection.

13 . A user equipment (UE), comprising:

a memory device, a transceiver coupled to the memory device, and an antenna coupled to the transceiver; and

a processor coupled to the transceiver and configured to cause the UE to:

while in a dual connectivity (DC) mode in a connected state with a master node (MN) associated with a master cell group (MCG) and in a connected state with a secondary node (SN) associated with a secondary cell group (SCG) comprising a primary secondary cell (PSCell), wherein the UE is configured with MN neighbor cells and SN neighbor cells:

receive a PSCell measurement cycle (MeasCyclePSCell) defining a measurement cycle period of the PSCell, and an indication to enter a suspended state for the secondary cell group (SCG);

in response to the indication, enter the suspended state for the SCG;

increase the received MeasCyclePSCell by applying a PSCell relaxation factor;

while in the suspended state for the SCG:

maintain a radio resource management (RRM) measurement configuration for the MN neighbor cells;

perform relaxed measurements on the PSCell over the MeasCyclePSCell that is increased by the PSCell relaxation factor;

perform RRM measurements on the MN neighbor cells during the suspended state;

skip RRM measurements on the SN neighbor cells during the suspended state; and

transmit, by the antenna, a measurement report comprising a one or more measurement results from the relaxed measurements and the RRM measurements.

14 . The UE of claim 13 , wherein the relaxed measurements are radio link monitoring (RLM) measurements; and

the measurement report comprises a SCG radio link failure (RLF) report.

15 . The UE of claim 13 , wherein the relaxed measurements are RRM measurements and the SCG further comprises one or more secondary cells (SCells); and

after entering the suspended state for the SCG, the processor is further configured to cause the UE to cancel the RRM measurements on the one or more SCells.

16 . The baseband processor of claim 7 , wherein the operations further comprise autonomously performing state switching on one or more SCells during the suspended state for the SCG.

17 . The non-transitory machine-readable medium of claim 9 , wherein the instructions further comprise a primary discontinuous reception (DRX) configuration for the MCG and a secondary DRX configuration for the SCG that is different than the primary DRX configuration, wherein

after entering the suspended state for the SCG, the instructions further comprise maintaining the secondary DRX configuration for the PSCell;

determining a layer 3 relaxed measurement period based on the secondary DRX configuration; and

the instructions further comprise performing the relaxed measurements on the PSCell based on the determined layer 3 relaxed measurement period.

18 . The non-transitory machine-readable medium of claim 11 , wherein the instructions further comprise autonomously performing state switching on one or more SCells during the suspended state for the SCG.

19 . The UE of claim 13 , wherein the processor further configures a primary discontinuous reception (DRX) configuration for the MCG and a secondary DRX configuration for the SCG that is different than the primary DRX configuration, wherein

after entering the suspended state for the SCG, the processor further causes the UE to maintain the secondary DRX configuration for the PSCell;

determine a layer 3 relaxed measurement period based on the secondary DRX configuration; and

perform the relaxed measurements on the PSCell based on the determined layer 3 relaxed measurement period.

20 . The UE of claim 15 , further comprising autonomously performing state switching on one or more SCells during the suspended state for the SCG.