Harq assistance information feedback for positively acknowledged data

A User Equipment, UE, configured to support a Hybrid Automatic Repeat Request, HARQ, process when communicating with a network node of a radio access network, the UE comprising:

• at least one processor, and
• at least one memory storing instructions that, when executed by the at least one processor, cause the UE at least to:
• establish a connection towards the network node;
• receive, from the network node, at least one Transport Block, TB;
• carry out a Cyclic Redundancy Check, CRC, for decoding the received at least one TB;
• in case of detecting a success in the decoding by determining that the received at least one TB passes the CRC check, prepare an assistance information;
• transmit, towards the network node, information for indicating the success and the assistance information for enabling the network node to trigger actions related to one or more next TBs based on the assistance information,
• wherein the UE is further configured to, in case of detecting the success, determine at least one transmission parameter based on Signal-to-Interference plus Noise Ratio, SINR, measurements performed by the UE, wherein at least one determined transmission parameter is different from a corresponding transmission parameter used for the transmission of the successfully decoded at least one TB, and
• wherein the UE is further configured to include information related to at least one determined different transmission parameter in the assistance information, wherein a transmission parameter is related to at least one of number of retransmissions required for successful decoding of a TB at the UE, Modulation and Coding Scheme (MCS), and rank, and wherein the UE is further caused to:
• measure an SINR value for the received at least one TB;
• calculate a difference between a preset decodable SINR value and the measured SINR value;
• and
• based on the calculated SINR difference value, determine the at least one transmission parameter for transmission of the one or more next TBs,
• wherein in particular, the UE is further caused to indicate to the gNB the calculated SINR difference value for indicating the gNB to determine the at least one transmission parameter for transmission of the one or more next TBs.

A User Equipment, UE, configured to support a Hybrid Automatic Repeat Request, HARQ, process when communicating with another user equipment, the UE comprising:

• at least one processor, and
• at least one memory storing instructions that, when executed by the at least one processor, cause the UE at least to:
• establish a radio connection towards the another user equipment via a direct link using device-to-device communication or sidelink communication;
• receive, from the another user equipment, at least one Transport Block, TB, and/or at least one Code Block, CB;
• carry out a Cyclic Redundancy Check, CRC, for decoding the received at least one TB and/or at least one CB;
• in case of detecting a success in the decoding by determining that the received at least one TB and/or at least one CB passes the CRC check, prepare an associated assistance information,
• transmit, towards the another user equipment, information for indicating the success and the assistance information for enabling the another user equipment to trigger actions related to one or more next TBs and/or CBs based on the associated assistance information,
• wherein the UE is further configured to, in case of detecting the success, determine at least one transmission parameter based on Signal-to-Interference plus Noise Ratio, SINR, measurements performed by the UE, wherein at least one determined transmission parameter is different from a corresponding transmission parameter used for the transmission of the successfully decoded at least one TB and/or at least one CB, and
• wherein the UE is further configured to include information related to at least one determined different transmission parameter in the assistance information.

A network node of a radio access network, configured to support a hybrid automatic repeat request, HARQ, process when communicating with a User Equipment, UE, the network node comprising:

• at least one processor, and
• at least one memory storing instructions that, when executed by the at least one processor, cause the network node at least to:
• establish a connection towards the UE;
• transmit, to the UE, at least one Transport Block, TB;
• receive, from the UE, information for indicating a success in decoding the at least one TB at the UE and an associated assistance information prepared by the UE, wherein the assistance information includes information related to a transmission parameter different from a corresponding transmission parameter used for the transmission of the at least one successfully decoded TB;
• and
• trigger actions related to one or more next TBs based on the assistance information for supporting successful decoding of the one or more next TBs at the UE, wherein the network node is further caused to:
• transmit to the UE a resource radio control, RRC, message for configuring the assistance information and for indicating the UE to send to the network node the assistance information in case of a success in decoding the at least one TB at the UE, wherein the network node is further caused to:
• transmit to the UE a first control element for configuring a first assistance information, for indicating determination of a first transmission parameter and for indicating the UE to send to the network node the first assistance information, in particular in case of a success in decoding the at least one TB at the UE;
• and
• after receiving the first assistance information, transmit to the UE a second control element for configuring a second assistance information, for indicating determination of a second transmission parameter and for indicating the UE to send to the network node the second assistance information, in particular in case of a success in decoding the at least one TB at the UE,
• wherein the first transmission parameter is different from the second assistance information, wherein the gNB is configured to configure and determine to transmit the first control element and the second control element based on information at the gNB related to the at least one TB.