SPS with skipping transmissions and adaptive HARQ

Patent metadata

Field	Value
Publication number	US-12309805-B2
Application number	US-202318140461-A
Country	US
Kind code	B2
Filing date	Apr 27, 2023
Priority date	May 12, 2016
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

In one embodiment, a method in a wireless device for adaptive HARQ retransmissions comprises receiving, from a network node, a request to initiate an adaptive hybrid automatic repeat request (HARQ) retransmission. The method comprises identifying a HARQ process associated with the HARQ retransmission request and determining whether a HARQ buffer of the HARQ process is empty. In response to determining that the HARQ buffer is empty, the method comprises not delivering the HARQ information to the HARQ process and not triggering an adaptive HARQ retransmission.

First claim

The invention claimed is:

1. A method in a wireless device for adaptive HARQ retransmissions, the method comprising:
receiving, from a network node, at a wireless device configured to skip uplink transmissions, a request to initiate an adaptive hybrid automatic repeat request (HARQ) retransmission, the HARQ retransmission request comprising HARQ information and addressed to a semi-persistent scheduling (SPS) cell radio network temporary identifier (C-RNTI) of the wireless device;
identifying a HARQ process associated with the HARQ retransmission request;
determining whether an uplink grant has been indicated for the HARQ process;
determining whether a HARQ buffer of the HARQ process is empty, the HARQ buffer associated with data to be transmitted to the network node; and
in response to determining that the HARQ buffer is empty and that the request was addressed to the SPS C-RNTI of the wireless device, ignoring the uplink grant.

2. The method of claim 1 , further comprising: determining that a medium access control (MAC) entity of the wireless device is configured to skip an uplink transmission when no uplink data is available.

3. The method of claim 1 , further comprising:
prior to receiving the HARQ retransmission request from the network node:
determining that no uplink data is available for transmission to the network node; and
skipping a scheduled uplink transmission to the network node.

4. The method of claim 1 , wherein the request to initiate an adaptive HARQ retransmission received from the network node comprises a new data indicator (NDI) that has not been toggled.

5. A wireless device for adaptive HARQ retransmission, comprising:
an interface, at a wireless device configured to skip uplink transmissions, configured to receive, from a network node, at a wireless device configured to skip uplink transmissions, a request to initiate an adaptive hybrid automatic repeat request (HARQ) retransmission, the HARQ retransmission request comprising HARQ information and addressed to a semi-persistent scheduling (SPS) cell radio network temporary identifier (C-RNTI) of the wireless device; and
processing circuitry communicatively coupled to the interface, the processing circuitry configured to:
identify a HARQ process associated with the HARQ retransmission request;
determine whether an uplink grant has been indicated for the HARQ process;

determine whether a HARQ buffer of the HARQ process is empty, the HARQ buffer associated with data to be transmitted to the network node and that the request was addressed to the SPS C-RNTI of the wireless device; and
in response to determining that the HARQ buffer is empty and that the request was addressed to the SPS C-RNTI of the wireless device, ignoring the uplink grant.

6. The wireless device of claim 5 , wherein the processing circuitry is further configured to determine that a medium access control (MAC) entity of the wireless device is configured to skip an uplink transmission when no uplink data is available.

7. The wireless device of claim 5 , wherein the processing circuitry is further configured to:
prior to receiving the HARQ retransmission request from the network node:
determine that no uplink data is available for transmission to the network node; and
skip a scheduled uplink transmission to the network node.

8. The wireless device of claim 5 , wherein the request to initiate an adaptive HARQ retransmission received from the network node comprises a new data indicator (NDI) that has not been toggled.

9. The method of claim 1 , wherein the wireless device configured to skip uplink transmissions comprises a wireless device in which skipUplinkTxSPS is configured.

10. The wireless device of claim 5 , wherein the wireless device configured to skip uplink transmissions comprises a wireless device in which skipUplinkTxSPS is configured.

Assignees

• Ericsson Telefon Ab L M

Inventors

• Dudda Torsten
• Enbuske Henrik

Classifications

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L1/1819

  with retransmission of additional or different redundancy · CPC title

• H04L1/1896

  ARQ related signaling · CPC title

• H04L1/1887

  Scheduling and prioritising arrangements · CPC title