Decoupled uplink/downlink initial access
AssigneeQUALCOMM Incorporated
InventorsJung RYU, Tianyang BAI, Kiran VENUGOPAL, Makesh Pravin JOHN WILSON, Tao LUO
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Abstract
Methods, apparatuses, and computer-readable mediums for wireless communication are disclosed by the present disclosure. In an example, a user equipment (UE) communicates with a base station on different uplink (UL) and downlink (DL) beam paths. In the example, the UE may indicate to the base station a preferred beam path to use. The UE may indicate the preferred beam path in response to an explicit request from the base station or without an explicit request. The use of different UL/DL beam paths allow beam paths which avoid interference from a user of the UE to be used.
Claims26
A method of wireless communications by a user equipment (UE), comprising:
- receiving, from a base station via a first downlink (DL) beam, a request for an indication of a preferred DL beam for the UE to communicate with the base station;
- determining the preferred DL beam for the UE to communicate with the base station, wherein the preferred DL beam is different from the first DL beam;
- and
- transmitting the indication of the preferred DL beam to the base station.
A method of wireless communications by a base station, comprising:
- transmitting, to a user equipment (UE) via a first downlink (DL) beam, a request for an indication of a preferred DL beam of the UE;
- receiving the indication of the preferred DL beam from the UE in response to the request;
- determining the preferred DL beam for communicating with the UE based on the indication, wherein the first DL beam is different from the preferred DL beam;
- and
- transmitting, in response to receiving the indication, a message via the preferred DL beam to the UE.
A method of wireless communications by a user equipment (UE), comprising:
- determining a preferred uplink (UL) beam and a preferred downlink (DL) beam for the UE to communicate with a base station, wherein the preferred UL beam is different from the preferred DL beam;
- selecting a preamble corresponding to the preferred DL beam;
- and
- transmitting, via the preferred UL beam, the preamble to the base station as an indication of the preferred DL beam.
A method of wireless communications by a base station, comprising:
- receiving, from a user equipment (UE) via an uplink (UL) beam, a preamble indicating a preferred downlink (DL) beam, wherein the UL beam is different from the preferred DL beam;
- determining to transmit a response to receiving the preamble via the preferred DL beam based on the preamble;
- and
- transmitting a Random Access Channel (RACH) Accept Response (RAR) via the preferred DL beam to the UE.
Dependencies are inferred from the claim text.