US 12,192,856 B2
Link adaptation for sidelink groupcast
Shehzad Ali Ashraf, Aachen (DE); Wanlu Sun, San Diego, CA (US); and Hieu Do, Järfälla (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/421,496
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Dec. 18, 2019, PCT No. PCT/EP2019/085919
§ 371(c)(1), (2) Date Jul. 8, 2021,
PCT Pub. No. WO2020/144024, PCT Pub. Date Jul. 16, 2020.
Claims priority of provisional application 62/790,535, filed on Jan. 10, 2019.
Prior Publication US 2022/0086602 A1, Mar. 17, 2022
Int. Cl. H04W 4/06 (2009.01); H04W 4/44 (2018.01); H04W 4/46 (2018.01); H04W 76/14 (2018.01); H04W 76/40 (2018.01); H04W 76/23 (2018.01)
CPC H04W 4/06 (2013.01) [H04W 4/44 (2018.02); H04W 4/46 (2018.02); H04W 76/14 (2018.02); H04W 76/40 (2018.02); H04W 76/23 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A method of operating a transmitting wireless device associated with a group, wherein the group includes the transmitting wireless device and a plurality of other wireless devices, the method comprising:
transmitting a groupcast data packet to the plurality of other wireless devices of the group;
determining a power/energy of at least one Hybrid Automatic Repeat Request (HARQ) feedback message received in response to the groupcast data packet, wherein respective positive acknowledgment (ACK) and negative acknowledgment (NACK) communication resources are provided for HARQ feedback of the groupcast data packet, and determining the power/energy comprises determining a combined power/energy received from some of the plurality of other wireless devices of the group over the ACK communication resource for the groupcast data packet and determining a combined power/energy received from other of the plurality of other wireless devices of the group over the NACK communication resource for the groupcast data packet; and
adjusting a transmission comprising performing the transmission using a modulation and coding scheme (MCS) and adjusting the MCS based on the power/energy of the at least one HARQ feedback message.