TBS indication and CQI reporting for lower BLER targets
A method, apparatus, and a computer-readable storage medium are provided for improved transport block size (TBS) indication and channel quality indicator (CQI) reporting for lower target block error ratios (BLERs). In an example implementation, the method may include a user equipment configuring a plurality of transport block sizes, activating one or more transport block sizes of the plurality of transport block sizes, and determining a first transport block size from an indication received from a network node when more than one transport block sizes of the one or more transport block sizes are activated. The method may further include determining, a second transport block size, the second transport block size determined based at least on the one or more transport block sizes that are activated and the first transport block size, and receiving a downlink transmission from the network node with the second transport block size. In an additional example implementation, the method may include a user equipment determining a channel quality indicator based at least on a physical downlink shared channel received from a network node and transmitting the channel quality indicator to the network node.
1 . An apparatus comprising at least one processor and at least one 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 perform:
receiving a transport block size configuration from a network node, the transport block size configuration including a plurality of transport block sizes, wherein the transport block size configuration is received via a radio resource control (RRC) message;
configuring the plurality of transport block sizes based on the transport block size configuration;
receiving an activation message from the network node, the activation message identifying one or more transport block sizes to be activated;
activating one or more transport block sizes of the plurality of transport block sizes based on the activation message, wherein the one or more activated transport block sizes are used for determining a channel quality indicator, and wherein the activating includes activating at least a first transport block size and a second transport block size;
determining the first transport block size from an indication received from the network node when more than one transport block sizes of the one or more transport block sizes are activated, wherein the indication includes downlink control information, wherein the downlink control information includes at least a preconfigured modulation and coding scheme and allocated resources that are used for determining the first transport block size;
determining the second transport block size, the second transport block size determined based at least on the one or more transport block sizes that are activated and the first transport block size, wherein the second transport block size is determined such that the second transport block size is closest to the first transport block size when using the preconfigured modulation and coding scheme, and wherein the preconfigured modulation and coding scheme is associated with a block error rate target or service type supported;
receiving a downlink transmission from the network node with the second transport block size; and
transmitting channel quality indicators for at least a smallest transport block size, a highest transport block size value of the activated transport block sizes, and a transport block size of the plurality of transport block sizes closest to a transport block size scheduled in a latest physical downlink shared channel (PDSCH) received from the network node.