Method and apparatus for power saving signal design in NR
A method of a user equipment (UE) for power saving is provided. The method comprises receiving, from a serving cell, a set of configurations, receiving a power saving signal (PoSS) from a first downlink channel based on the received set of configurations, acquiring a first part of information for power saving from the PoSS, receiving, based on the received set of configurations, a second downlink channel that is a control channel, and acquiring a second part of information for the power saving from the received second downlink channel.
1. A user equipment (UE) comprising:
a receiver configured to:
receive a configuration for a slot offset;
receive configuration for a search space set; and
receive a physical downlink control channel (PDCCH), according to the search space set in a common search space (CSS), in a slot that is before a slot corresponding to a start of a discontinuous reception (DRX) cycle by a number of slots equal to the slot offset;
a decoder configured to decode a downlink control information (DCI) format in the PDCCH, wherein the DCI format includes a field indicating either reception or no reception of PDCCHs in a number of next DRX cycles; and
a processor operably connected to the receiver, the processor configured to instruct the receiver, when the decoder correctly decodes the DCI format, to either receive or skip reception of the PDCCHs in the number of next DRX cycles based on the indication by the field in the DCI format.
2. The UE of claim 1 , wherein the receiver is further configured to receive a configuration for the number of next DRX cycles.
3. The UE of claim 1 , wherein the processor is further configured to instruct the receiver to skip reception of the PDCCHs in the number of next DRX cycles when the decoder does not correctly decode the DCI format.
4. The UE of claim 1 , wherein the receiver is further configured to receive the PDCCH in a same bandwidth part (BWP) as the BWP of PDCCH receptions at an end of a previous DRX cycle.
5. The UE of claim 1 , wherein the receiver is further configured to receive the PDCCH in a control resource set (CORESET) used for PDCCH receptions at an end of a previous DRX cycle.
6. The UE of claim 1 , wherein when the field indicates reception of PDCCHs in the number of next DRX cycles, the DCI format includes an additional field that indicates a maximum number of layers for reception of physical downlink shared channels (PDSCHs) in the number of next DRX cycles.
7. The UE of claim 1 , wherein when the field indicates reception of the PDCCHs in the number of next DRX cycles, the DCI format includes an additional field that indicates a bandwidth part (BWP) for the reception of PDCCHs in the number of next DRX cycles.
8. A base station comprising:
a transmitter configured to:
transmit a configuration for a slot offset
transmit of configuration for a search space set; and
transmit a physical downlink control channel (PDCCH), according to the search space set in a common search space (CSS), in a slot that is before a slot corresponding to a start of a discontinuous reception (DRX) cycle by a number of slots equal to the slot offset;
an encoder configured to encode a downlink control information (DCI) format in the PDCCH, wherein the DCI format includes a field indicating either transmission or no transmission of PDCCHs in a number of next DRX cycles; and
a processor configured to instruct the transmitter to either transmit or to skip transmission of the PDCCHs in the number of next DRX cycles based on the indication by the field in the DCI format.
9. The base station of claim 8 , wherein the transmitter is further configured to transmit a configuration for the number of next DRX cycles.
10. The base station of claim 8 , wherein the transmitter is further configured to transmit the PDCCH in a same bandwidth part (BWP) as the BWP of PDCCH transmissions at an end of a previous DRX cycle.
11. The base station of claim 8 , wherein the transmitter is further configured to transmit the PDCCH in a control resource set (CORESET) used for PDCCH transmissions at an end of a previous DRX cycle.
12. A method for physical downlink control channels (PDCCHs), the method comprising:
receiving a configuration for a slot offset
receiving configuration for a search space set;
receiving a PDCCH, according to the search space set in a common search space (CSS), in a slot that is before a slot corresponding to a start of a discontinuous reception (DRX) cycle by a number of slots equal to the slot offset;
decoding a downlink control information (DCI) format in the PDCCH, wherein the DCI format includes a field indicating either reception or no reception of PDCCHs in a number of next DRX cycles; and
receiving the PDCCHs in the number of next DRX cycles or skipping reception of the PDCCHs in the number of next DRX cycles, when the decoder correctly decodes the DCI format, based on the indication by the field in the DCI format.
13. The method of claim 12 , further comprising:
receiving a configuration for the number of next DRX cycles.
14. The method of claim 12 , further comprising:
skipping reception of the PDCCHs in the number of next DRX cycles when the decoder does not correctly decode the DCI format.
15. The method of claim 12 , further comprising:
receiving the PDCCH in a same bandwidth part (BWP) as the BWP of PDCCH receptions at an end of a previous DRX cycle.
16. The method of claim 12 , further comprising:
receiving the PDCCH in a control resource set (CORESET) used for PDCCH receptions at an end of a previous DRX cycle.
17. The method of claim 12 , wherein when the field indicates reception of the PDCCHs in the number of next DRX cycles, the DCI format includes an additional field that indicates a maximum number of layers for reception of physical downlink shared channels (PDSCHs) in the number of next DRX cycles.
18. The method of claim 12 , wherein when the field indicates reception of the PDCCHs in the number of next DRX cycles, the DCI format includes an additional field that indicates a bandwidth part (BWP) for the reception of PDCCHs in the number of next DRX cycles.
19. The base station of claim 8 , wherein when the field indicates transmissions of the PDCCHs in the number of next DRX cycles, the DCI format includes an additional field that indicates a maximum number of layers for transmission of physical downlink shared channels (PDSCHs) in the number of next DRX cycles.
20. The base station of claim 8 , wherein when the field indicates transmission of the PDCCHs in the number of next DRX cycles, the DCI format includes an additional field that indicates a bandwidth part (BWP) for the transmission of PDCCHs in the number of next DRX cycles.