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US 10,382,169 B2Granted
HARQ systems and methods for grant-free uplink transmissions
AssigneeHuawei Technologies Co., Ltd.
InventorsYu Cao, Liqing Zhang
Life of this patent
Estimating the term…
Abstract
Systems and methods are disclosed for performing hybrid automatic repeat request (HARQ) for grant-free uplink transmissions. Some of the systems and methods disclosed herein may address problems such as how to perform acknowledgement (ACK) and/or negative acknowledgement (NACK), how to determine and signal retransmission timing, how to determine the transmission/retransmission attempt and the redundancy version (RV), and/or how to perform the HARQ combining.
Claims48
A method performed by a user equipment (UE) comprising:
- transmitting an initial grant-free uplink transmission of encoded data;
- without receiving a negative acknowledgement (NACK) for the encoded data, addressed to the UE, transmitting at least one grant-free uplink retransmission of the encoded data;
- wherein the initial grant-free uplink transmission utilizes a first multiple access (MA) signature, and a grant-free uplink retransmission of the encoded data utilizes a second MA signature and carries retransmission data for facilitating decoding of the encoded data.
A method performed by a user equipment (UE) comprising:
- transmitting an initial grant-free uplink transmission of encoded data;
- without receiving a negative acknowledgement (NACK) for the encoded data, addressed to the UE, transmitting at least one grant-free uplink retransmission of the encoded data;
- wherein a grant-free uplink transmission from the UE utilizes at least one of a multiple access (M A) signature and an uplink resource that identifies a redundancy version (RV) of the encoded data in the grant-free uplink transmission.
A user equipment (UE) comprising:
- at least one antenna;
- and
- a grant-free transmission module;
- the at least one antenna configured to transmit an initial grant-free uplink transmission of encoded data;
- the grant-free transmission module configured to, without receiving a negative acknowledgement (NACK) addressed to the UE for the encoded data, cause the UE to transmit at least one grant-free uplink retransmission of the encoded data;
- wherein the initial grant-free uplink transmission utilizes a first multiple access (MA) signature, and a grant-free uplink retransmission of the encoded data utilizes a second MA signature and carries retransmission data for facilitating successful decoding of the encoded data.
3 more elements
A user equipment (UE) comprising:
- at least one antenna;
- and
- a grant-free transmission module;
- the at least one antenna configured to transmit an initial grant-free uplink transmission of encoded data;
- the grant-free transmission module configured to, without receiving a negative acknowledgement (NACK) addressed to the UE for the encoded data, cause the UE to transmit at least one grant-free uplink retransmission of the encoded data,
- wherein a grant-free uplink transmission from the UE utilizes at least one of a multiple access (MA) signature and an uplink resource that identifies a redundancy version (RV) of the encoded data in the grant-free uplink transmission.
3 more elements
A method performed by a base station comprising:
- receiving an initial grant-free uplink transmission of encoded data from a user equipment (UE);
- without transmitting a negative acknowledgement (NACK) for the encoded data, receiving at least one grant-free uplink retransmission of the encoded data;
- wherein:
- the initial grant-free uplink transmission utilizes a first multiple access (MA) signature;
- a grant-free uplink retransmission of the encoded data is also received without transmitting an acknowledgement (ACK) for the encoded data;
- and
- the grant-free uplink retransmission of the encoded data utilizes a second multiple access (MA) signature and carries retransmission data for facilitating decoding of the encoded data.
4 more elements
A method performed by a base station comprising:
- receiving an initial grant-free uplink transmission of encoded data from a user equipment (UE);
- without transmitting a negative acknowledgement (NACK) for the encoded data, receiving at least one grant-free uplink retransmission of the encoded data;
- wherein a grant-free uplink transmission from the UE utilizes at least one of a multiple access (MA) signature and an uplink resource that identifies a redundancy version (RV) of the encoded data in the grant-free uplink transmission.
A base station comprising:
- at least one antenna;
- and
- a grant-free transmission module;
- the at least one antenna configured to receive an initial grant-free uplink transmission of an encoded data;
- the grant-free transmission module configured to, without generating a negative acknowledgement (NACK) for the encoded data, receive via the at least one antenna at least one grant-free uplink retransmission of the encoded data,
- wherein:
- the initial grant-free uplink transmission utilizes a first multiple access (MA) signature;
- a grant-free uplink retransmission of the encoded data is also received without generating an acknowledgement (ACK) for the encoded data;
- and
- the grant-free uplink retransmission of the encoded data utilizes a second multiple access (MA) signature and carries retransmission data for facilitating decoding of the encoded data.
7 more elements
A base station comprising:
- at least one antenna;
- and
- a grant-free transmission module;
- the at least one antenna configured to receive an initial grant-free uplink transmission of an encoded data;
- the grant-free transmission module configured to, without generating a negative acknowledgement (NACK) for the encoded data, receive via the at least one antenna at least one grant-free uplink retransmission of the encoded data;
- wherein a grant-free uplink transmission from the UE utilizes at least one of a multiple access (MA) signature and an uplink resource that identifies a redundancy version (RV) of the encoded data in the grant-free uplink transmission.
3 more elements
Dependencies are inferred from the claim text.