Method and apparatus for initial access using non-orthogonal multiple access in communication network
AssigneeElectronics and Telecommunications Research Institute
InventorsJung Bin Kim, Gyeong Rae Im
Life of this patent
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Abstract
A method of a base station may comprise: receiving a signal including a first message of a first terminal and a first message of a second terminal in one RO; determining the first terminal as a near terminal based on preconfigured criteria; determining the second terminal as a far terminal based on the preconfigured criteria; transmitting, to the first terminal and the second terminal, one or more DCIs including a NOMA indicator indicating that second messages, which are responses to the first messages of the first terminal and the second terminal, are to be respectively transmitted in a NOMA scheme; and transmitting the second messages to the first terminal and the second terminal based on the one or more DCIs.
Claims20
A method of a base station, comprising:
- receiving a signal including a first message of a first terminal and a first message of a second terminal in one random access channel (RACH) occasion (RO);
- determining the first terminal as a near terminal based on preconfigured criteria;
- determining the second terminal as a far terminal based on the preconfigured criteria;
- transmitting, to the first terminal and the second terminal, one or more downlink control information (DCIs) including a non-orthogonal multiple access (NOMA) indicator indicating that second messages, which are responses to the first messages of the first terminal and the second terminal, are to be respectively transmitted in a NOMA scheme;
- and
- transmitting the second messages to the first terminal and the second terminal based on the one or more DCIs,
- wherein the NOMA indicator is set to a first value or a second value,
- wherein, based on the NOMA indicator being set to the first value, the NOMA indicator indicates that a second message for one of the first terminal or the second terminal is to be transmitted, and
- wherein, based on the NOMA indicator being set to the second value, the NOMA indicator indicates that second messages for the first terminal and the second terminal are to be transmitted based on the NOMA scheme.
A method of a first terminal, comprising:
- transmitting a first message to a base station in a random access channel (RACH) occasion (RO);
- receiving, from the base station, one or more downlink control information (DCIs) for scheduling a second message, which is a response to the first message;
- in response to that the one or more DCIs include a non-orthogonal multiple access (NOMA) indicator indicating that a second message is to be transmitted based on a NOMA scheme, determining a type of the first terminal as a near terminal or a far terminal based on preconfigured criteria;
- and
- receiving the second message from the base station based on the determined type,
- wherein the NOMA indicator is set to a first value or a second value,
- wherein, based on the NOMA indicator being set to the first value, the NOMA indicator indicates that a second message for one of the first terminal or a second terminal is to be transmitted, and
- wherein, based on the NOMA indicator being set to the second value, the NOMA indicator indicates that second messages for the first terminal and the second terminal are to be transmitted based on the NOMA scheme.
A first terminal comprising at least one processor, wherein the at least one processor causes the first terminal to perform:
- transmitting a first message to a base station in a random access channel (RACH) occasion (RO);
- receiving, from the base station, one or more downlink control information (DCIs) for scheduling a second message, which is a response to the first message;
- in response to that the one or more DCIs include a non-orthogonal multiple access (NOMA) indicator indicating that the second message is to be transmitted based on a NOMA scheme, determining a type of the first terminal as a near terminal or a far terminal based on preconfigured criteria;
- and
- receiving the second message from the base station based on the determined type,
- wherein the NOMA indicator is set to a first value or a second value,
- wherein, based on the NOMA indicator being set to the first value, the NOMA indicator indicates that a second message for one of the first terminal or a second terminal is to be transmitted, and
- wherein, based on the NOMA indicator being set to the second value, the NOMA indicator indicates that second messages for the first terminal and the second terminal are to be transmitted based on the NOMA scheme.
Dependencies are inferred from the claim text.