Rach conveyance of DL synchronization beam information for various DL-UL correspondence states
AssigneeQUALCOMM Incorporated
InventorsMuhammad Nazmul Islam, Sundar Subramanian, Junyi Li, Navid Abedini, Bilal Sadiq
Life of this patent
Estimating the term…
Abstract
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a downlink (DL) signal from a base station on one or more DL beam(s). The UE may identify a selected DL beam of the one or more DL beam(s) for communications from the base station to the UE. The UE may transmit a scheduling request message to the base station using at least one of a resource or a waveform selected based at least in part on the selected DL beam.
Claims45
A method for wireless communication at a user equipment (UE), comprising:
- receiving a downlink (DL) signal from a base station on one or more DL beams;
- selecting a DL beam of the one or more DL beams for communications from the base station to the UE;
- selecting a random access channel (RACH) preamble based at least in part on an index of the selected DL beam, the RACH preamble corresponding to the selected DL beam of the one or more DL beams;
- and
- transmitting a RACH message to the base station using the RACH preamble selected based at least in part on the selected DL beam.
A method for wireless communication at a base station, comprising:
- transmitting a downlink (DL) signal on one or more DL beams;
- receiving, on a random access channel (RACH) preamble, a RACH message from a user equipment (UE);
- identifying, based at least in part on associating the RACH preamble with an index of a selected DL beam, the selected DL beam of the one or more DL beams for communications from the base station to the UE;
- and
- transmitting one or more subsequent messages to the UE using the selected DL beam.
An apparatus for wireless communication at a user equipment (UE), comprising:
- a processor,
- memory coupled with the processor;
- and
- instructions stored in the memory and executable by the processor to cause the apparatus to:
- receive a downlink (DL) signal from a base station on one or more DL beams;
- select a DL beam of the one or more DL beams for communications from the base station to the UE;
- select a random access channel (RACH) preamble based at least in part on an index of the selected DL beam, the RACH preamble corresponding to the selected DL beam of the one or more DL beams;
- and
- transmit a RACH message to the base station using the RACH preamble selected based at least in part on the selected DL beam.
An apparatus for wireless communication at a base station, comprising:
- a processor,
- memory coupled with the processor;
- and
- instructions stored in the memory and executable by the processor to cause the apparatus to:
- transmit a downlink (DL) signal on one or more DL beams;
- receive, a random access channel (RACH) preamble, a RACH message from a user equipment (UE);
- identify, based at least in part on associating the RACH preamble with an index of a selected DL beam, the selected DL beam of the one or more DL beams for communications from the base station to the UE;
- and
- transmit one or more subsequent messages to the UE using the selected DL beam.
A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by a processor to:
- receive a downlink (DL) signal from a base station on one or more DL beams;
- select a DL beam of the one or more DL beams for communications from the base station to the UE;
- select a random access channel (RACH) preamble based at least in part on an index of the selected DL beam, the RACH preamble corresponding to the selected DL beam of the one or more DL beams;
- and
- transmit a RACH message to the base station using the RACH preamble selected based at least in part on the selected DL beam.
A non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to:
- transmit a downlink (DL) signal on one or more DL beams;
- receive, on a random access channel (RACH) preamble, a RACH message from a user equipment (UE);
- identify, based at least in part on associating the RACH preamble with an index of a selected DL beam, the selected DL beam of the one or more DL beams for communications from the base station to the UE;
- and
- transmit one or more subsequent messages to the UE using the selected DL beam.
Dependencies are inferred from the claim text.