Paging procedure enhancement
Certain aspects of the present disclosure relate to wireless communications, and more particularly, techniques for an enhanced paging procedure. A method that may be performed by a user equipment (UE) includes detecting, during a paging occasion (PO), at least one downlink control information (DCI) that indicates a paging message and additional downlink signals and using the additional downlink signals to enhance processing of the paging message.
1. A method for wireless communications by a user equipment (UE), comprising:
detecting, during a paging occasion (PO), at least one downlink control information (DCI) that indicates a paging message and additional downlink signals, wherein the additional downlink signals comprise aperiodic tracking reference signals (A-TRSs); and
using the additional downlink signals to enhance processing of the paging message, comprising performing channel tracking based on the A-TRSs before processing the paging message.
2. The method of claim 1 , wherein the UE:
powers on radio frequency (RF) components and buffers signals during the PO;
powers down the RF components to process the buffered signals to detect the paging DCI;
powers back on the RF components to process the additional downlink signals; and
uses results of processing the additional downlink signals to process at least the buffered signals to detect the paging message.
3. The method of claim 1 , wherein the DCI indicates the A-TRSs via one or more previously reserved bits or fields in an existing paging DCI format.
4. The method of claim 1 , wherein:
a DCI of a first format indicates the paging message; and
a DCI of a second format indicates the A-TRSs.
5. The method of claim 1 , wherein at least one DCI comprises:
a new DCI format, different than an existing paging DCI format, that indicates the paging message and the A-TRSs.
6. The method of claim 1 , wherein the A-TRSs are indicated via a format of the DCI or a radio network temporary identifier (RNTI) used to scramble the paging DCI.
7. The method of claim 1 , wherein the DCI indicates an index of A-TRS resources.
8. The method of claim 7 , wherein the DCI indicates a time gap between the paging DCI and the A-TRSs.
9. The method of claim 1 , wherein:
the A-TRSs are located in a same slot as the paging message; and
the UE performs rate matching for the paging message around the A-TRS.
10. A method for wireless communications by a user equipment (UE), comprising:
detecting, during a paging occasion (PO), at least one downlink control information (DCI) that indicates a paging message and additional downlink signals, wherein the additional downlink signals comprise at least one repetition of a physical downlink control channel (PDCCH) carrying the paging DCI or a repetition of the paging message; and
using the additional downlink signals to enhance processing of the paging message, comprising at least one of using the repetition of the PDCCH or paging message for timing synchronization or combining.
11. The method of claim 10 , wherein:
a DCI of a first format indicates the paging message; and
a DCI of a second format indicates the repetition of the paging message.
12. The method of claim 10 , wherein at least one DCI comprises:
a new DCI format, different than an existing paging DCI format, that indicates the paging message and the repetition of the paging message.
13. The method of claim 10 , wherein the paging DCI indicates an offset and a number of the at least one repetition.
14. The method of claim 10 , wherein the additional downlink signals further comprise aperiodic tracking reference signals (A-TRSs).
15. A method for wireless communications by a network entity, comprising:
transmitting to a user equipment (UE), during a paging occasion (PO), a paging downlink control information (DCI) that indicates a paging message and additional downlink signals;
transmitting the paging message; and
transmitting the additional downlink signals in accordance with the indication, wherein:
the additional downlink signals comprise aperiodic tracking reference signals (A-TRSs),
the A-TRSs are located in a same slot as the paging message, and
the network entity performs rate matching for the paging message around the A-TRSs.
16. The method of claim 15 , wherein the DCI indicates the A-TRSs via one or more previously reserved bits or fields in the paging DCI.
17. The method of claim 16 , wherein the DCI indicates the A-TRSs via one or more previously reserved bits or fields in an existing paging DCI format.
18. The method of claim 16 , wherein:
a DCI of a first format indicates the paging message; and
a DCI of a second format indicates the A-TRSs.
19. The method of claim 16 , wherein at least one DCI comprises:
a new DCI format, different than an existing paging DCI format, that indicates the paging message and the A-TRSs.
20. The method of claim 15 , wherein the DCI indicates an index of A-TRS resources.
21. The method of claim 20 , wherein the DCI indicates a time gap between the paging DCI and the A-TRSs.
22. A method for wireless communications by a network entity, comprising:
transmitting to a user equipment (UE), during a paging occasion (PO), a paging downlink control information (DCI) that indicates a paging message and additional downlink signals;
transmitting the paging message; and
transmitting the additional downlink signals in accordance with the indication, wherein the additional downlink signals comprise at least one repetition of a physical downlink control channel (PDCCH) carrying the paging DCI or a repetition of the paging message, and wherein the paging DCI indicates an offset and a number of the at least one repetition.
23. The method of claim 22 , wherein:
a DCI of a first format indicates the paging message; and
a DCI of a second format indicates the repetition of the paging message.
24. The method of claim 22 , wherein at least one DCI comprises:
a new DCI format, different than an existing paging DCI format, that indicates the paging message and the repetition of the paging message.
25. The method of claim 24 , wherein the additional downlink signals further comprise aperiodic tracking reference signals (A-TRSs).
26. An apparatus for wireless communications by a user equipment (UE), comprising:
a memory comprising computer-executable instructions; and
one or more processors configured to execute the computer-executable instructions and cause the one or more processors to:
detect, during a paging occasion (PO), at least one downlink control information (DCI) that indicates a paging message and additional downlink signals, wherein the additional downlink signals comprise aperiodic tracking reference signals (A-TRSs); and
use the additional downlink signals to enhance processing of the paging message, comprising performing channel tracking based on the A-TRSs before processing the paging message.
27. An apparatus for wireless communications by a network entity, comprising:
a memory comprising computer-executable instructions; and
one or more processors configured to execute the computer-executable instructions and cause the one or more processors to:
transmit to a user equipment (UE), during a paging occasion (PO), a paging downlink control information (DCI) that indicates a paging message and additional downlink signals;
transmit the paging message; and
transmit the additional downlink signals in accordance with the indication, wherein:
the additional downlink signals comprise aperiodic tracking reference signals (A-TRSs),
the A-TRSs are located in a same slot as the paging message, and
the network entity performs rate matching for the paging message around the A-TRSs.
28. An apparatus for wireless communications by a user equipment (UE), comprising:
a memory comprising computer-executable instructions; and
one or more processors configured to execute the computer-executable instructions and cause the one or more processors to:
detect, during a paging occasion (PO), at least one downlink control information (DCI) that indicates a paging message and additional downlink signals, wherein the additional downlink signals comprise at least one repetition of a physical downlink control channel (PDCCH) carrying the paging DCI or a repetition of the paging message; and
use the additional downlink signals to enhance processing of the paging message, comprising at least one of using the repetition of the PDCCH or paging message for timing synchronization or combining.
29. An apparatus for wireless communications by a network entity, comprising:
a memory comprising computer-executable instructions; and
one or more processors configured to execute the computer-executable instructions and cause the one or more processors to:
transmit to a user equipment (UE), during a paging occasion (PO), a paging downlink control information (DCI) that indicates a paging message and additional downlink signals;
transmit the paging message; and
transmit the additional downlink signals in accordance with the indication, wherein the additional downlink signals comprise at least one repetition of a physical downlink control channel (PDCCH) carrying the paging DCI or a repetition of the paging message, and wherein the paging DCI indicates an offset and a number of the at least one repetition.