Differential reporting for beam groups or antenna panel groups
A method comprises: configuring multiple reporting modes for multi-level based transmitter (TX) beam index reporting for a particular beam/antenna panel group from a plurality of beam/antenna groups, wherein the multiple reporting modes includes at least one of a full reporting mode configuration for the particular beam/antenna panel group, a full reporting mode configuration common for the plurality of beam/antenna panel groups, a differential reporting mode, and a partial reporting mode, selecting a reporting mode from the multiple reporting modes, and sending a report based on the selected reporting mode.
1. A method, comprising:
configuring, by a user equipment, at least one reporting mode for transmitter beam index reporting for a particular beam/antenna panel group from a plurality of beam/antenna groups, wherein the at least one reporting mode comprises at least one of a full reporting mode configuration for the particular beam/antenna panel group, a full reporting mode configuration common for the plurality of beam/antenna panel groups, a differential reporting mode, and a partial reporting mode; and
sending a report based on the configured at least one reporting mode.
2. The method of claim 1 , wherein the full reporting mode configuration for the particular beam/antenna panel group comprises at least one of:
a beam/antenna panel group identification for the particular beam/antenna panel group,
a maximum reference signal received power (RSRP) value of the particular beam/antenna panel group,
a relative power resolution window for the particular beam/antenna panel group in decibel (dB),
a pre-configured relative power resolution window in dB,
a relative n-bit relative power offset value defining differential power offset with respect to the maximum RSRP value of the particular beam/antenna panel group, and
N-different transmitter beam indices for the particular beam/antenna panel group.
3. The method of claim 1 , wherein the full reporting mode configuration common for the plurality of beam/antenna panel groups includes at least one of:
a common report for the plurality of beam/antenna panel groups; and
group-specific reporting.
4. The method of claim 3 , wherein the common report for the plurality of beam/antenna panel groups comprises at least one of:
a maximum reference signal received power value associated with the plurality of beam/antenna panel groups,
one of a relative power resolution window common for the plurality of beam/antenna panel groups, and
a pre-configured relative power resolution window in dB.
5. The method of claim 3 , wherein the group-specific reporting comprises at least one of:
a beam/antenna panel group identification,
a relative n-bit relative power offset value defining differential power offset to a maximum reference signal received power value over the plurality of beam/antenna panel groups, and
N-different transmitter beam indices for a beam/antenna panel group.
6. The method of claim 1 , wherein the differential reporting mode includes at least one of a single-level non-group-wise differential beam report and a multi-level non-group-wise differential beam report for N scheduled Channel State Information Reference Signal (CSI-RS) antenna ports (APs) or N-previously reported transmitted beams per group.
7. An apparatus, comprising:
at least one processor; and
at least one non-transitory memory including computer program code,
the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to at least:
configure at least one reporting mode for transmitter beam index reporting for a particular beam/antenna panel group from a plurality of beam/antenna groups, wherein the at least one reporting mode comprises at least one of a full reporting mode configuration for the particular beam/antenna panel group, a full reporting mode configuration common for the plurality of beam/antenna panel groups, a differential reporting mode, and a partial reporting mode; and
send a report based on the configured at least one reporting mode.
8. The apparatus of claim 7 , wherein the full reporting mode configuration for the particular beam/antenna panel group comprises at least one of:
a beam/antenna panel group identification for the particular beam/antenna panel group,
a maximum reference signal received power (RSRP) value of the particular beam/antenna panel group,
a relative power resolution window for the particular beam/antenna panel group in decibel (dB),
a pre-configured relative power resolution window in dB,
a relative n-bit relative power offset value defining differential power offset with respect to the maximum RSRP value of the particular beam/antenna panel group, and
N-different transmitter beam indices for the particular beam/antenna panel group.
9. The apparatus of claim 7 , wherein the full reporting mode configuration common for the plurality of beam/antenna panel groups includes at least one of:
a common report for the plurality of beam/antenna panel groups, and
group-specific reporting.
10. The apparatus of claim 9 , wherein the common report for the plurality of beam/antenna panel groups comprises at least one of:
a maximum reference signal received power value associated with the plurality of beam/antenna panel groups,
one of a relative power resolution window common for the plurality of beam/antenna panel groups, and
a pre-configured relative power resolution window in dB.
11. The apparatus of claim 9 , wherein the group-specific reporting comprises at least one of:
a beam/antenna panel group identification,
a relative n-bit relative power offset value defining differential power offset to a maximum reference signal received power value over the plurality of beam/antenna panel groups, and
N-different transmitter beam indices for a beam/antenna panel group.
12. The apparatus of claim 7 , wherein the differential reporting mode includes at least one of a single-level non-group-wise differential beam report and a multi-level non-group-wise differential beam report for N scheduled Channel State Information Reference Signal (CSI-RS) antenna ports (APs) or N-previously reported transmitted beams.
13. The apparatus of claim 12 , wherein the single-level non-group-wise differential beam report comprises at least one of:
a maximum reference signal received power value over the plurality of beam/antenna panel groups; and
N different 1-bit relative power offset value for each beam/antenna panel group.
14. The apparatus of claim 12 , wherein the multi-level non-group-wise differential beam report for N scheduled CSI-RS APs or N-previously reported transmitted beams, for all beam groups, comprises at least one of:
a maximum reference signal received power value over the plurality of beam/antenna panel groups; and
a relative power resolution value, only if a computed power resolution value differs X dB from a previously reported relative power resolution value.
15. The apparatus of claim 14 , wherein the multi-level non-group-wise differential beam report for N scheduled CSI-RS APs or N-previously reported transmitter beams, for the plurality of beam/antenna panel groups, comprises, for N transmitter beams, n-bit relative power offset from the maximum RSRP value over the plurality of beam/antenna panel groups.
16. The apparatus of claim 7 , wherein the partial reporting mode includes at least one of multi-level partial beam report for N-previously reported transmitter beam indices with tracking transmitter beam tracking capability of L<N new transmitter beams, and multi-level partial beam report for N-previously reported transmitter beam indices with transmitter beam tracking capability of L<N new strongest transmitter beams.
17. The apparatus of claim 16 , wherein the multi-level partial beam report for N-previously reported transmitter beam indices with transmitter beam tracking capability of L<N new transmitter beams comprises at least one of:
a maximum RSRP value over the plurality of beam/antenna panel groups,
relative power resolution value is only reported if the computed power resolution value differs X dB from previously reported relative power resolution value.
18. The apparatus of claim 16 , wherein transmitter beam index comprises at least one of a configured reference signal (RS) resource, a RS resource index, and a RS antenna port, wherein RS comprises at least one of Channel State Information Reference Signal (CSI-RS), Demodulation Reference Signal (DMRS) of New Radio Physical downlink Control Channel (NR-PDCCH), NR_Physical Downlink Shared Channel (PDSCH) and a RS enabling beam management functionality.
19. The apparatus of claim 16 , wherein the apparatus is further caused to:
apply source coding to further compress signalled bits using at least one of run-length and Lempel-Ziv.
20. An apparatus, comprising:
at least one processor; and
at least one non-transitory memory including computer program code,
the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to at least:
configure at least one reporting mode for transmitter beam index reporting for a particular beam/antenna panel group from a plurality of beam/antenna groups, wherein the at least one reporting mode comprises at least one of a full reporting mode configuration for the particular beam/antenna panel group, a full reporting mode configuration common for the plurality of beam/antenna panel groups, a differential reporting mode, and a partial reporting mode; and
send the configured at least one reporting mode to a user equipment.