Grant-free transmission method and apparatus for non-orthogonal multiple access in wireless communication system

A grant-free data communication method of a base station in a wireless communication system, the method comprising:

• transmitting configuration information of a grant-free transmission resource to a terminal, wherein the configuration information of the grant-free transmission resource comprises information about a resource region in time and frequency resource domain of the grant-free transmission resource;
• determining whether a physical uplink shared channel (PUSCH) of the terminal is transmitted in a grant-free transmission resource region determined based on the configuration information;
• obtaining uplink control information (UCI) comprising scheduling information and index information of a partial resource in which PUSCH is transmitted, from the terminal through a partial region of the grant-free transmission resource region, based on a result of the determining;
• and
• obtaining the PUSCH from the terminal, based on the UCI, via the partial resource among a plurality of partial resources included in the grant-free transmission resource.

A terminal using a grant-free data communication method in a wireless communication system, the terminal comprising:

• a transceiver;
• and
• at least one controller connected to the transceiver and configured to:
• receive, from a base station, configuration information of a grant-free transmission resource, wherein the configuration information of the grant-free transmission resource comprises information about a resource region in time and frequency resource domain of the grant-free transmission resource;
• select one of a plurality of partial resources included in the grant-free transmission resources as a transmission resource for transmitting a physical uplink shared channel (PUSCH), based on the configuration information, transmit, to the base station, uplink control information (UCI) comprising scheduling information of the selected partial resource and index information of the selected partial resource;
• and
• transmit, to the base station, the PUSCH based on the selected partial resource.

A base station using a grant-free data communication method in a wireless communication system, the base station comprising:

• a transceiver;
• and
• at least one controller connected to the transceiver and configured to:
• transmit configuration information of a grant-free transmission resource to a terminal, wherein the configuration information of the grant-free transmission resource comprises information about a resource region in time and frequency resource domain of the grant-free transmission resource;
• determine whether a physical uplink shared channel (PUSCH) of the terminal is transmitted in a grant-free transmission resource region determined based on the configuration information;
• obtain uplink control information (UCI) comprising scheduling information and index information of a partial resource in which PUSCH is transmitted, from the terminal through a partial region of the grant-free transmission resource region, based on a result of the determining;
• and
• obtain the PUSCH from the terminal, based on the UCI, via the partial resource among a plurality of partial resources included in the grant-free transmission resource.