US 11,638,305 B2 · Overlapping RACH occasions and mixed mode RACH retransmission configurations

Abstract

A UE may receive, from a base station/TRP, a configuration for a beam pair including an UL beam and a DL beam and transmit a RACH message via the UL beam while receiving DL information via the DL beam. The UE and/or the base station/TRP may be configured to operate in a FD mode. In aspects, the UE may transmit a RACH preamble based on a first mode of transmission. After a threshold time delay measured from the transmission of the RACH preamble, the UE may retransmit the RACH preamble based on a second mode of transmission. The second mode of transmission may be a same mode of transmission or a different mode of transmission from the first mode of transmission. Each mode of transmission may be based on one or more of TDM, FDM, or SDM.

Claims20

Dependent claims

A method of wireless communication of a user equipment (UE), comprising:

transmitting a random access channel (RACH) preamble based on a first mode of transmission of a plurality of modes of transmission;
determining to retransmit the RACH preamble based on a threshold time delay measured from the transmission of the RACH preamble;
and
retransmitting the RACH preamble based on a second mode of transmission of the plurality of modes of transmission and based on the threshold time delay measured from the transmission of the RACH preamble, the second mode of transmission being a different mode of transmission from the first mode of transmission, each mode of transmission of the plurality of modes of transmission based on one or more of time division multiplexing (TDM), frequency division multiplexing (FDM), or spatial division multiplexing (SDM), wherein a first retransmission through one before a last retransmission of the RACH preamble is based on one or more of FDM or SDM and the last retransmission of the RACH preamble is based on TDM.

1 more element

A method of wireless communication of a base station, comprising:

receiving a transmission of a random access channel (RACH) preamble based on a first mode of transmission of a plurality of modes of transmission;
and
receiving a retransmission of the RACH preamble based on a second mode of transmission of the plurality of modes of transmission and based on a threshold time delay measured from the transmission of the RACH preamble, the second mode of transmission being a different mode of transmission from the first mode of transmission, each mode of transmission of the plurality of modes of transmission based on one or more of time division multiplexing (TDM), frequency division multiplexing (FDM), or spatial division multiplexing (SDM), wherein a first retransmission through one before a last retransmission of the RACH preamble is based on one or more of FDM or SDM and the last retransmission of the RACH preamble is based on TDM.

An apparatus for wireless communication of a user equipment (UE), comprising:

a memory;
and
at least one processor coupled to the memory and configured to:
transmit a random access channel (RACH) preamble based on a first mode of transmission of a plurality of modes of transmission;
determine to retransmit the RACH preamble based on a threshold time delay measured from the transmission of the RACH preamble;
and
retransmit the RACH preamble based on a second mode of transmission of the plurality of modes of transmission and based on the threshold time delay measured from the transmission of the RACH preamble, the second mode of transmission being a different mode of transmission from the first mode of transmission, each mode of transmission of the plurality of modes of transmission based on one or more of time division multiplexing (TDM), frequency division multiplexing (FDM), or spatial division multiplexing (SDM), wherein a first retransmission through one before a last retransmission of the RACH preamble is based on one or more of FDM or SDM and the last retransmission of the RACH preamble is based on TDM.

4 more elements

An apparatus for wireless communication of a base station, comprising:

a memory;
and
at least one processor coupled to the memory and configured to:
receive a transmission of a random access channel (RACH) preamble based on a first mode of transmission of a plurality of modes of transmission;
and
receive a retransmission of the RACH preamble based on a second mode of transmission of the plurality of modes of transmission and based on a threshold time delay measured from the transmission of the RACH preamble, the second mode of transmission being a different mode of transmission from the first mode of transmission, each mode of transmission of the plurality of modes of transmission based on one or more of time division multiplexing (TDM), frequency division multiplexing (FDM), or spatial division multiplexing (SDM), wherein a first retransmission through one before a last retransmission of the RACH preamble is based on one or more of FDM or SDM and the last retransmission of the RACH preamble is based on TDM.

3 more elements

Dependencies are inferred from the claim text.

Overlapping RACH occasions and mixed mode RACH retransmission configurations

Life of this patent

Overlapping RACH occasions and mixed mode RACH retransmission configurations

Life of this patent

Abstract

Claims20