US 2024/0195463 A1 · SPACE TIME CODING FOR SIDELINK TRANSMISSIONS

Abstract

The described techniques may support multi-rank sidelink communications that may be reduced to single rank communications if failure to decode the multi-rank sidelink communications occurs. A user equipment (UE) may transmit a first message including first data using a first precoding vector applied for a first layer and a second precoding vector applied for a second layer. If the first message is not decoded successfully, the UE may transmit a second message including second data using a third precoding vector applied for the first layer and a fourth precoding vector applied for the second layer, where the second data is derived from the first data, the third precoding vector is derived from the second precoding vector, and the fourth precoding vector is derived from the first precoding vector. The second message may effectively reduce a rank of the first message when the channel is rank deficient.

Claims20

Dependent claims

An apparatus for wireless communication, 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 first sidelink message comprising a first set of data symbols using a first precoding vector applied for a first layer and a second precoding vector applied for a second layer;
receive an indication that the first sidelink message was not decoded successfully;
and
transmit a second sidelink message comprising a second set of data symbols using a third precoding vector applied for the first layer and a fourth precoding vector applied for the second layer based at least in part on the indication that the first sidelink message was not decoded successfully, wherein the second set of data symbols are derived from the first set of data symbols, and wherein the third precoding vector is derived from the second precoding vector and the fourth precoding vector is derived from the first precoding vector.

5 more elements

An apparatus for wireless communication, comprising:

a processor;
memory coupled with the processor;
and
instructions stored in the memory and executable by the processor to cause the apparatus to:
monitor for a first sidelink message comprising a first set of data symbols using a first precoding vector applied for a first layer and a second precoding vector applied for a second layer;
transmit an indication that the first sidelink message was not decoded successfully;
and
receive a second sidelink message comprising a second set of data symbols using a third precoding vector applied for the first layer and a fourth precoding vector applied for the second layer based at least in part on the indication that the first sidelink message was not decoded successfully, wherein the second set of data symbols are derived from the first set of data symbols, and wherein the third precoding vector is derived from the second precoding vector and the fourth precoding vector is derived from the first precoding vector.

5 more elements

A method for wireless communication, comprising:

transmitting a first sidelink message comprising a first set of data symbols using a first precoding vector applied for a first layer and a second precoding vector applied for a second layer;
receiving an indication that the first sidelink message was not decoded successfully;
and
transmitting a second sidelink message comprising a second set of data symbols using a third precoding vector applied for the first layer and a fourth precoding vector applied for the second layer based at least in part on receiving the indication that the first sidelink message was not decoded successfully, wherein the second set of data symbols are derived from the first set of data symbols, and wherein the third precoding vector is derived from the second precoding vector and the fourth precoding vector is derived from the first precoding vector.

1 more element

Dependencies are inferred from the claim text.

Space time coding for sidelink transmissions

Life of this patent

Space time coding for sidelink transmissions

Life of this patent

Abstract

Claims20