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US 10,652,866 B2Granted
Systems and methods for supporting asynchronous uplink HARQ and multiple simultaneous transmissions
AssigneeHuawei Technologies Co., Ltd.
InventorsMohamed Adel Salem, Toufiqul Islam
Life of this patent
Estimating the term…
Abstract
Current HARQ procedures for grant-based uplink transmissions may not be suitable for implementations in which a UE can simultaneously transmit multiple transport blocks (TBs) to a base station. However, in some scenarios, such as in some grant-free uplink transmission schemes, a UE may simultaneously transmit multiple TBs. Systems and methods are disclosed herein for performing HARQ for situations in which a UE simultaneously transmits multiple TBs to a base station. By using the systems and methods described herein, HARQ may therefore be performed in such situations.
Claims20
A method for uplink data transmission, the method performed by a user equipment (UE), and the method comprising:
- transmitting, to a base station, a first grant-free uplink data transmission including a first transport block, wherein the first transport block is associated with a first HARQ process, wherein the first grant-free uplink data transmission includes a first reference signal sequence, and wherein the first grant-free uplink data transmission is sent using first time-frequency resources in an uplink slot of a carrier;
- transmitting, to the base station, a second grant-free uplink data transmission including a second transport block, wherein the second transport block is associated with a second HARQ process, wherein the second grant-free uplink data transmission includes a second reference signal sequence, and wherein the second grant-free uplink data transmission is sent using second time-frequency resources in the uplink slot of the carrier;
- decoding first feedback and second feedback received from the base station in a downlink acknowledgement channel, the first feedback representing a first ACK or first NACK for the first transport block, and the second feedback representing a second ACK or a second NACK for the second transport block;
- wherein at least one of the first time-frequency resources and first reference signal sequence identifies both the UE and the first HARQ process, and wherein at least one of the second time-frequency resources and the second reference signal sequence identifies both the UE and the second HARQ process.
1 more element
A user equipment (UE) comprising:
- a transmitter to:
- transmit, to a base station, a first grant-free uplink data transmission including a first transport block, wherein the first transport block is associated with a first HARQ process, wherein the first grant-free uplink data transmission includes a first reference signal sequence, and wherein the first grant-free uplink data transmission is sent using first time-frequency resources in an uplink slot of a carrier;
- and
- transmit, to the base station, a second grant-free uplink data transmission including a second transport block, wherein the second transport block is associated with a second HARQ process, wherein the second grant-free uplink data transmission includes a second reference signal sequence, and wherein the second grant-free uplink data transmission is sent using second time-frequency resources in the uplink slot of the carrier;
- a receiver to receive first feedback and second feedback from the base station in a downlink acknowledgement channel, the first feedback representing a first ACK or first NACK for the first transport block, and the second feedback representing a second ACK or a second NACK for the second transport block;
- a decoder to decode the first feedback and the second feedback;
- wherein at least one of the first time-frequency resources and first reference signal sequence identifies both the UE and the first HARQ process, and wherein at least one of the second time-frequency resources and the second reference signal sequence identifies both the UE and the second HARQ process.
4 more elements
A method performed by a base station, the method comprising:
- receiving, from a user equipment (UE), a first grant-free uplink data transmission including a first transport block, wherein the first transport block is associated with a first HARQ process, wherein the first grant-free uplink data transmission includes a first reference signal sequence, and wherein the first grant-free uplink data transmission is received using first time-frequency resources in an uplink slot of a carrier;
- receiving, from the UE, a second grant-free uplink data transmission including a second transport block, wherein the second transport block is associated with a second HARQ process, wherein the second grant-free uplink data transmission includes a second reference signal sequence, and wherein the second grant-free uplink data transmission is received using second time-frequency resources in the uplink slot of the carrier;
- decoding the first transport block and generating first feedback representing a first ACK or first NACK for the first transport block;
- decoding the second transport block and generating second feedback representing a second ACK or second NACK for the second transport block;
- transmitting, to the UE, the first feedback and the second feedback in a downlink acknowledgement channel;
- wherein at least one of the first time-frequency resources and first reference signal sequence identifies both the UE and the first HARQ process, and wherein at least one of the second time-frequency resources and the second reference signal sequence identifies both the UE and the second HARQ process.
3 more elements
A base station comprising:
- a receiver to:
- receive, from a user equipment (UE), a first grant-free uplink data transmission including a first transport block, wherein the first transport block is associated with a first HARQ process, wherein the first grant-free uplink data transmission includes a first reference signal sequence, and wherein the first grant-free uplink data transmission is received using first time-frequency resources in an uplink slot of a carrier;
- receive, from the UE, a second grant-free uplink data transmission including a second transport block, wherein the second transport block is associated with a second HARQ process, wherein the second grant-free uplink data transmission includes a second reference signal sequence, and wherein the second grant-free uplink data transmission is received using second time-frequency resources in the uplink slot of the carrier;
- a decoder to:
- decode the first transport block and generate first feedback representing a first ACK or first NACK for the first transport block;
- decode the second transport block and generate second feedback representing a second ACK or second NACK for the second transport block;
- a transmitter to transmit, to the UE, the first feedback and the second feedback in a downlink acknowledgement channel;
- wherein at least one of the first time-frequency resources and first reference signal sequence identifies both the UE and the first HARQ process, and wherein at least one of the second time-frequency resources and the second reference signal sequence identifies both the UE and the second HARQ process.
5 more elements
Dependencies are inferred from the claim text.