Method and apparatus for ultra reliable and low latency communication

An operation method of a base station, the operation method comprising:

• transmitting, to a terminal, information on a requirement including information of target block error rates (BLERs) configured to have multi levels, wherein the multi levels of the target BLERs are configured respectively for a plurality of transmit blocks included in a first downlink (DL) packet;
• receiving, from the terminal, first information including one or more transmission parameters for achieving the target BLERs and a target throughput included in the information on the requirement, wherein the one or more transmission parameters include at least one of precoder information, modulation and coding scheme (MCS) information, transmission power information, and resource allocation information;
• transmitting the first DL packet to the terminal;
• and
• receiving a first feedback signal transmitted based on a result of a consecutive decoding performed for the plurality of transmit blocks included in the first DL packet by the terminal,
• wherein an allocation of resource for the each of the plurality of transmit blocks included in the first DL packet is performed independently for each of the multi levels of the target BLERs, when cyclic redundancy check (CRC) operations for first to n-th transmit blocks among the plurality of transmit blocks are not successful and CRC operation for an (n+1)-th transmit block among the plurality of transmit blocks is successful in the consecutive decoding, the first feedback signal is an ACK signal and the first feedback signal is received in a first feedback resource allocated for a feedback operation for the (n+1)-th transmit block, and the n is a natural number.

A terminal in a communication system, the terminal comprising:

• a processor;
• and
• a memory storing at least one instruction executable by the processor,
• wherein when executed by the processor, the at least one instruction causes the processor to:
• receive, from a base station, information on a requirement including information of target block error rates (BLERs) configured to have multi levels, wherein the multi levels of the target BLERs are configured respectively for a plurality of transmit blocks included in a first downlink (DL) packet;
• transmit, to the base station, first information including one or more transmission parameters for achieving the target BLERs and a target throughput included in the information on the requirement, wherein the one or more transmission parameters include at least one of precoder information, modulation and coding scheme (MCS) information, transmission power information, and resource allocation information;
• perform a consecutive decoding for the plurality of transmit blocks included in the first DL packet transmitted from the base station;
• and
• transmit a first feedback signal based on a result of the consecutive decoding in a first feedback resource,
• wherein an allocation of resource for the each of the plurality of transmit blocks included in the first DL packet is performed independently for each of the multi levels of the target BLERs, when cyclic redundancy check (CRC) operations for first to n-th transmit blocks among the plurality of transmit blocks are not successful and CRC operation for an (n+1)-th transmit block among the plurality of transmit blocks is successful in the consecutive decoding, the first feedback signal is an acknowledgement (ACK) signal and the first feedback resource is a resource allocated for a feedback operation for the (n+1)-th transmit block, and the n is a natural number.