Semi-persistent scheduling and discontinuous reception alignment
View Patent ↗A method is provided for detection of an uplink grant for a user agent (UA). The method comprises detecting a semi-persistent scheduling (SPS) activation/reconfiguration signaling over a physical downlink control channel (PDCCH) only during an SPS activation window, wherein the SPS activation window precedes a discontinuous reception (DRX) on-duration by a predetermined amount of time. Also included is a UA comprising a component configured to detect an SPS activation/reconfiguration signaling over a PDCCH only during an SPS activation window, wherein the SPS activation window precedes a DRX on-duration by a predetermined amount of time.
1. A method in a user equipment (UE), comprising:
transmitting a request for an uplink transmission resource to an access device; and
responsive to transmitting the request, monitoring, during a time period that at least partially precedes a start of a defined DRX (discontinuous reception) on-duration of a configured DRX cycle, a physical downlink control channel (PDCCH) for semi-persistent scheduling (SPS) activation signaling.
2. The method of claim 1 , wherein the defined DRX on-duration is determined based on a DRX configuration message received via radio resource control (RRC) configuration.
3. The method of claim 2 , further comprising determining a plurality of configured DRX on periods based on the DRX configuration message.
4. The method of claim 1 , further comprising refraining from detecting the SPS activation signaling until after the request is transmitted.
5. The method of claim 4 , wherein the request for the uplink transmission resource is sent as a result of a talk spurt after a silence period in a voice session.
6. The method of claim 1 , wherein said monitoring includes detecting and decoding SPS activation signaling received via the physical downlink control channel (PDCCH).
7. The method of claim 1 , wherein said monitoring includes detecting and decoding SPS activation signaling received via the PDCCH.
8. The method of claim 7 , wherein detecting and decoding occurs only during an SPS activation window, the SPS activation window that at least partially precedes the start of the defined DRX on-duration.
9. The method of claim 8 , wherein the SPS activation window ends when the uplink transmission resource is released.
10. A user equipment configured to:
transmit a request for an uplink transmission resource to an access device; and
responsive to transmitting the request, monitor, during a time period that at least partially precedes a start of a defined DRX (discontinuous reception) on-duration of a configured DRX cycle, a physical downlink control channel (PDCCH) for semi-persistent scheduling (SPS) activation signaling.
11. The user equipment of claim 10 , wherein the defined DRX on-duration is determined based on a DRX configuration message received via radio resource control (RRC) configuration.
12. The user equipment of claim 11 , further configured to determine a plurality of configured DRX on periods based on the DRX configuration message.
13. The user equipment of claim 10 , further configured to refrain from detecting the SPS activation signaling until after the request is transmitted.
14. The user equipment of claim 13 , wherein the request for the uplink transmission resource is sent as a result of a talk spurt after a silence period in a voice session.
15. The user equipment of claim 10 , wherein monitor comprises detect and decode SPS activation signaling received via a physical downlink control channel (PDCCH).
16. The user equipment of claim 10 , wherein monitor comprises detect and decode SPS activation signaling received via the PDCCH.
17. The user equipment of claim 16 , wherein detect and decode occurs only during an SPS activation window, the SPS activation window that at least partially precedes the start of a DRX on-duration.
18. The user equipment of claim 17 , wherein the SPS activation window ends when the uplink transmission resource is released.
19. A non-transitory computer readable medium storing instructions to cause a processor in a UE to perform operations comprising:
transmitting a request for an uplink transmission resource to an access device; and
responsive to transmitting the request, monitoring, during a time period that at least partially precedes a start of a defined DRX (discontinuous reception) on-duration of a configured DRX cycle, a physical downlink control channel (PDCCH) for semi-persistent scheduling (SPS) activation signaling.
20. The computer readable medium of claim 19 , wherein the defined DRX on-duration is determined based on a DRX configuration message received via radio resource control (RRC) configuration.
21. The computer readable medium of claim 20 , the instructions further comprising determining a plurality of configured DRX on periods based on the DRX configuration message.
22. The computer readable medium of claim 19 , the instructions further comprising refraining from detecting the SPS activation signaling until after the request is transmitted.
23. The computer readable medium of claim 22 , wherein the request for the uplink transmission resource is sent as a result of a talk spurt after a silence period in a voice session.
24. The computer readable medium of claim 19 , wherein said monitoring includes detecting and decoding SPS activation signaling received via a physical downlink control channel (PDCCH).
25. The computer readable medium of claim 19 , wherein said monitoring includes detecting and decoding SPS activation signaling received via the PDCCH.
26. The computer readable medium of claim 25 , wherein detecting and decoding occurs only during an SPS activation window, the SPS activation window that at least partially precedes the start of the defined DRX on-duration.
27. The computer readable medium of claim 26 , wherein the SPS activation window ends when the uplink transmission resource is released.