Scheduling request collection after a discontinuous reception period
A wireless device configured for discontinuous reception (DRX) may and operating in a system that uses directional beamforming may identify a random access time period after awaking from a DRX sleep mode. The device may then transmit a scheduling request during the random access time period. In some cases, the device may transmit the scheduling request using frequency resources also associated with random access transmissions. In other cases, the device may utilize resources that are not associated with random access. The determination of which frequency resources are used may depend on the length of the DRX. That is, if a device has been in a sleep mode for a long time, it may use random access frequency resources that are associated with a more robust transmission configuration.
1. A method of wireless communication comprising:
entering a sleep mode of a discontinuous reception (DRX) configuration;
identifying that a scheduling request is to be transmitted to a base station;
receiving a directional synchronization subframe from the base station; and
transmitting the scheduling request to the base station using resources based at least in part on the received directional synchronization subframe.
2. The method of claim 1 , further comprising:
identifying the directional synchronization subframe from a set of directional subframes transmitted by the base station based at least in part on a signal strength of the directional synchronization subframe.
3. The method of claim 1 , further comprising:
identifying a time period associated with a random access channel (RACH), wherein the time period associated with the RACH is identified based at least in part on the received directional synchronization subframe.
4. The method of claim 3 , further comprising:
transmitting the scheduling request to the base station during the time period associated with the RACH.
5. The method of claim 1 , further comprising:
entering an active mode of the DRX configuration, wherein the scheduling request is transmitted during the active mode.
6. A method of wireless communication comprising:
configuring a user equipment (UE) with a discontinuous reception (DRX) configuration;
transmitting a directional synchronization subframe; and
receiving a scheduling request from the UE on resources based at least in part on the transmitted directional synchronization subframe.
7. The method of claim 6 , further comprising:
identifying a time period associated with a random access channel (RACH), wherein the time period associated with the RACH is identified based at least in part on the transmitted directional synchronization subframe.
8. The method of claim 7 , further comprising:
receiving the scheduling request during the time period associated with the RACH.
9. An apparatus for wireless communication, comprising:
a processor;
memory in electronic communication with the process; and
instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
enter a sleep mode of a discontinuous reception (DRX) configuration;
identify that a scheduling request is to be transmitted to a base station;
receive a directional synchronization subframe from the base station; and
transmit the scheduling request to the base station using resources based at least in part on the received directional synchronization subframe.
10. The apparatus of claim 9 , wherein the instructions are operable to cause the apparatus to:
identify the directional synchronization subframe from a set of directional subframes transmitted by the base station based at least in part on a signal strength of the directional synchronization subframe.
11. The apparatus of claim 9 , wherein the instructions are operable to cause the apparatus to:
identify a time period associated with a random access channel (RACH), wherein the time period associated with the RACH is identified based at least in part on the received directional synchronization subframe.
12. The apparatus of claim 11 , wherein the instructions are operable to cause the apparatus to:
transmit the scheduling request to the base station during the time period associated with the RACH.
13. The apparatus of claim 9 , wherein the instructions are operable to cause the apparatus to:
enter an active mode of the DRX configuration, wherein the scheduling request is transmitted during the active mode.
14. An apparatus for wireless communication, comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
configure a user equipment (UE) with a discontinuous reception (DRX) configuration;
transmit a directional synchronization subframe; and
receive a scheduling request from the UE on resources based at least in part on the transmitted directional synchronization subframe.
15. The apparatus of claim 14 , wherein the instructions are operable to cause the apparatus to:
identify a time period associated with a random access channel (RACH), wherein the time period associated with the RACH is identified based at least in part on the transmitted directional synchronization subframe.
16. The apparatus of claim 15 , wherein the instructions are operable to cause the apparatus to:
receive the scheduling request during the time period associated with the RACH.