Method and apparatus for transport block reception based on configured grant in wireless mobile communication system

1 . A user equipment (UE) configured for a wireless communication system, the UE comprising:

a transceiver; and

a controller coupled to the transceiver and configured to:

activate a cell-level discontinuous reception operation for a serving cell based on an activation state indicator;

when the cell-level discontinuous reception operation is activated:

identify a starting point of an active duration by determining that [(SFN×10)+subframe number]modulo (cycle length) equals a start offset value, wherein SFN is a system frame number;

initiate an on-duration timer for the serving cell at a slot offset from a beginning of a subframe corresponding to the starting point;

during an overlap between an active period of the cell-level discontinuous reception operation and a non-active time of a UE-level discontinuous reception operation, receive a semi-persistent scheduling (SPS) configured downlink transport block; and

during an overlap between a non-active period of the cell-level discontinuous reception operation and an active time of the UE-level discontinuous reception operation, refrain from receiving the SPS configured downlink transport block,

wherein the controller is further configured to receive, from a base station, a radio resource control (RRC) configuration message for the serving cell, the RRC configuration message comprising:

a first configuration parameter identifying the start offset value for a cell-level discontinuous reception cycle;

a second configuration parameter comprising the cycle length and an active duration length for the cell-level discontinuous reception cycle; and

the activation state indicator for activating the cell-level discontinuous reception operation.

2 . The UE of claim 1 , wherein:

the RRC configuration message comprises a plurality of cell-level discontinuous reception configurations, each configuration comprising:

a respective configuration identifier;

a respective cycle length; and

a respective active duration length;

the activation state indicator comprises one of the respective configuration identifiers; and

the controller is configured to:

activate the cell-level discontinuous reception operation using parameters of a configuration identified by the respective configuration identifier indicated in the activation state indicator; and

apply the respective cycle length and the respective active duration length of the identified configuration.

3 . The UE of claim 2 , wherein:

the UE is configured with a plurality of serving cells including the serving cell; and

the controller is configured to:

receive respective RRC configuration messages for respective serving cells of the plurality of serving cells;

extract, from each respective RRC configuration message, a respective activation state indicator for a corresponding serving cell; and

independently activate or deactivate the cell-level discontinuous reception operation for each of the respective serving cells based on the respective activation state indicator.

4 . The UE of claim 1 , wherein the controller is further configured to:

during the active period of the cell-level discontinuous reception operation:

receive periodic channel state information reference signal (CSI-RS) on the serving cell via the transceiver; and

receive semi-persistent CSI-RS on the serving cell via the transceiver;

during the non-active period of the cell-level discontinuous reception operation:

refrain from receiving the periodic CSI-RS on the serving cell; and

refrain from receiving the semi-persistent CSI-RS on the serving cell; and

derive channel measurements for computing channel state information (CSI) based on a most recent CSI-RS reception occasion that occurred during the active period of the cell-level discontinuous reception operation.

5 . The UE of claim 1 , wherein the controller is further configured to:

activate a cell-level discontinuous transmission operation for an uplink of the serving cell based on a second activation state indicator;

when the cell-level discontinuous transmission operation is activated:

determine active and non-active periods for uplink transmission based on the cell-level discontinuous reception cycle;

during an active period of the cell-level discontinuous transmission operation:

transmit periodic sounding reference signal (SRS) via the transceiver;

transmit semi-persistent SRS via the transceiver; and

transmit a scheduling request via the transceiver;

during a non-active period of the cell-level discontinuous transmission operation:

refrain from transmitting the periodic SRS;

refrain from transmitting the semi-persistent SRS; and

refrain from transmitting the scheduling request.

6 . The UE of claim 5 , wherein:

the serving cell is configured with a normal uplink (NUL) carrier and a supplementary uplink (SUL) carrier;

the RRC configuration message further comprises an uplink indicator specifying whether the cell-level discontinuous transmission operation applies to:

the NUL carrier only,

the SUL carrier only, or

both the NUL carrier and the SUL carrier; and

the controller is configured to activate the cell-level discontinuous transmission operation for the uplink carrier or carriers specified by the uplink indicator.

7 . The UE of claim 1 , wherein:

the UE is configured with a plurality of serving cells including the serving cell;

the plurality of serving cells are divided into a primary discontinuous reception group and a secondary discontinuous reception group;

the RRC configuration message comprises:

a first set of UE-level discontinuous reception parameters for the primary discontinuous reception group, comprising a first on-duration timer and a first inactivity timer;

a second set of UE-level discontinuous reception parameters for the secondary discontinuous reception group, comprising a second on-duration timer and a second inactivity timer; and

common UE-level discontinuous reception parameters shared by both groups, comprising a slot offset and a cycle start offset; and

the controller is configured to:

apply the first set of UE-level discontinuous reception parameters to serving cells in the primary discontinuous reception group; and

apply the second set of UE-level discontinuous reception parameters to serving cells in the secondary discontinuous reception group.