Using sounding reference signals (SRS) for repeater downlink channel sounding
AssigneeQUALCOMM Incorporated
InventorsHua Wang, Arumugam Chendamarai Kannan, Divyansh Karemore, Navid Abedini, Tao Luo, Junyi Li
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Abstract
A network entity may employ techniques for wireless communications including obtaining, from a repeater device, an indication of an uplink gain factor associated with uplink transmissions from a user equipment (UE). The network entity may select a precoding matrix associated with downlink transmissions to the UE according to the uplink gain factor. The network entity may output downlink signaling to the UE via the repeater device according to the precoding matrix, a channel rank, and a modulation and coding scheme (MCS) via the repeater device.
Claims30
A network entity, comprising:
- one or more memories storing processor-executable code;
- and
- one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the network entity to:
- obtain, from a repeater device, an indication of an uplink gain factor associated with uplink transmissions from a user equipment (UE) via the repeater device;
- and
- output downlink signaling to the UE via the repeater device according to a precoding matrix associated with downlink transmissions to the UE via the repeater device, a channel rank, and a modulation and coding scheme, wherein the precoding matrix is selected according to the uplink gain factor, and wherein the channel rank and the modulation and coding scheme are selected according to the uplink gain factor, a downlink gain factor, and the precoding matrix.
A repeater device, comprising:
- one or more memories storing processor-executable code;
- and
- one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the repeater device to:
- output, to a network entity, an indication of an uplink gain factor associated with uplink transmissions from a user equipment (UE);
- obtain downlink signaling according to a channel rank and a modulation and coding scheme (MCS) corresponding to the uplink gain factor and a downlink gain factor;
- and
- forward the downlink signaling to the UE.
A method for wireless communications at a network entity, comprising:
- obtaining, from a repeater device, an indication of an uplink gain factor associated with uplink transmissions from a user equipment (UE) via the repeater device;
- and
- outputting downlink signaling to the UE via the repeater device according to a precoding matrix associated with downlink transmissions to the UE via the repeater device, a channel rank, and a modulation and coding scheme, wherein the precoding matrix is selected according to the uplink gain factor, and wherein the channel rank and the modulation and coding scheme are selected according to the uplink gain factor, a downlink gain factor, and the precoding matrix.
A method for wireless communications at a repeater device, comprising:
- outputting, to a network entity, an indication of an uplink gain factor associated with uplink transmissions from a user equipment (UE);
- obtaining downlink signaling according to a channel rank and a modulation and coding scheme corresponding to the uplink gain factor and a downlink gain factor;
- and
- forwarding the downlink signaling to the UE.
Dependencies are inferred from the claim text.