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 method for a user equipment (UE) to receive physical downlink control channels (PDCCHs), the method comprising:
receiving:
a configuration for a number of reference signal (RS) resource sets, wherein:
one or more of the RS resource sets include one or more RS resources, and
one or more of the RS resource sets are associated with a spatial reception parameter,
a configuration for a paging occasion (PO) over slots in time, wherein the PO includes a number of PDCCH reception occasions, and
synchronization signals and physical broadcast channel blocks (SS/PBCH blocks);
determining:
a first of the RS resource sets that has a spatial reception parameter that is the same as a spatial reception parameter of a received SS/PBCH block,
an absence or presence of a reception for RS resources in the first RS resource set that is in a first slot that is prior to a second slot for a PDCCH reception occasion of the PO, and
an indication based on the absence or presence of the reception for the RS resources; and
receiving a PDCCH, using the spatial reception parameter of the first RS resource set, within the second slot only when the indication is for the presence of the reception for the RS resources.
2. The method of claim 1 , wherein the configuration for the number of RS resource sets is provided by a system information block.
3. The method of claim 1 , further comprising determining:
the PO based on an identity of the UE, and
an antenna port based on the identity of the UE, wherein each of the RS resources is a channel state information reference signal (CSI-RS) resource from the antenna port.
4. The method of claim 1 , further comprising:
measuring a reference signal received power (RSRP) or a reference signal received quality (RSRQ) for a cell based on the RS resources, and
determining a cell selection criterion for the cell, wherein the RS resources provide an identity of the cell.
5. The method of claim 1 , wherein the RS resources provide information for at least one of:
a slot number,
a system frame number,
a symbol number,
a paging frame index, or
a PO index.
6. The method of claim 1 , further comprising determining a time offset between a start time for one or more of the RS resource sets that are in a third slot and a start time of a PO in a fourth slot based on the configuration for the number of RS resource sets.
7. The method of claim 1 , further comprising determining a number of resource blocks (RBs) for reception of the number of RS resource sets based on the configuration for the number of RS resource sets.
8. A user equipment (UE) comprising:
a receiver configured to receive:
a configuration for a number of reference signal (RS) resource sets, wherein:
one or more of the RS resource sets include one or more RS resources, and
one or more of the RS resource sets are associated with a spatial reception parameter,
a configuration for a paging occasion (PO) over slots in time, wherein the PO includes a number of physical downlink control channel (PDCCH) reception occasions, and
synchronization signals and physical broadcast channel blocks (SS/PBCH blocks); and
a processor operably connected to the receiver, the processor configured to determine:
a first of the RS resource sets that has a spatial reception parameter that is the same as a spatial reception parameter of a received SS/PBCH block,
an absence or presence of a reception for RS resources in the first RS resource set that is in a first slot that is prior to a second slot for a PDCCH reception occasion of the PO, and
an indication to the receiver based on the absence or presence of the reception for the RS resources,
wherein the receiver is further configured to receive a PDCCH, using the spatial reception parameter of the first RS resource set, within the second slot only when the indication is for the presence of the reception for the RS resources.
9. The UE of claim 8 , wherein the configuration for the number of RS resource sets is provided by a system information block.
10. The UE of claim 8 , wherein:
each of the RS resources is a channel state information reference signal (CSI-RS) resource from an antenna port, and
the processor is further configured to determine:
the PO based on an identity of the UE, and
the antenna port based on the identity of the UE.
11. The UE of claim 8 , wherein:
the RS resources provide an identity of a cell, and
the processor is further configured to:
measure a reference signal received power (RSRP) or a reference signal received quality (RSRQ) for the cell based on the RS resources, and
determine a cell selection criterion for the cell.
12. The UE of claim 8 , wherein the RS resources provide information for at least one of:
a slot number,
a system frame number,
a symbol number,
a paging frame index, or
a PO index.
13. The UE of claim 8 , wherein the processor is further configured to determine a time offset between a start time for reception of one or more of the RS resource sets that are in a third slot and a start time of a PO in a fourth slot based on the configuration for the number of RS resource sets.
14. The UE of claim 8 , wherein the processor is further configured to determine a number of resource blocks (RBs) for reception of the number of RS resource sets based on the configuration for the number of RS resource sets.
15. A base station comprising:
a transmitter configured to transmit:
a configuration for a number of reference signal (RS) resource sets, wherein:
one or more of the RS resource sets include one or more RS resources, and
one or more of the RS resource sets are associated with a spatial reception parameter,
a configuration for a paging occasion (PO) over slots in time, wherein the PO includes a number of physical downlink control channel (PDCCH) reception occasions, and
synchronization signals and physical broadcast channel blocks (SS/PBCH blocks); and
a processor operably connected to the transmitter, the processor configured to determine:
a first of the RS resource sets that has a spatial reception parameter that is the same as a spatial transmission parameter of a transmitted SS/PBCH block,
an absence or presence of a transmission for RS resources in the first RS resource set that is in a first slot that is prior to a second slot for a PDCCH reception occasion of the PO, and
an indication to the transmitter based on the absence or presence of the transmission for the RS resources,
wherein, based on the indication, the transmitter is further configured to transmit a PDCCH, using the spatial reception parameter of the first RS resource set, within the second slot only when the indication is for the presence of the reception for the RS resources.
16. The base station of claim 15 , wherein the configuration for the number of RS resource sets is provided by a system information block.
17. The base station of claim 15 , wherein:
each of the RS resources is a channel state information reference signal (CSI-RS) resource from an antenna port, and
the processor is further configured to determine:
the PO based on an identity of a user equipment (UE), and
the antenna port based on the identity of the UE.
18. The base station of claim 15 , wherein the RS resources provide information for at least one of:
a cell,
a slot number,
a system frame number,
a symbol number,
a paging frame index, or
a PO index.
19. The base station of claim 15 , wherein the processor is further configured to determine a time offset between a start time for transmission of one or more of the RS resource sets that are in a third slot and a start time of a PO in a fourth slot based on the configuration for the number of RS resource sets.
20. The base station of claim 15 , wherein the processor is further configured to determine a number of resource blocks (RBs) for transmission of the number of RS resource sets based on the configuration for the number of RS resource sets.