SLIV-Based HARQ-ACK Location for Multi-Carrier SPS Release
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Solution Overview
Problem
Existing wireless communication systems face challenges in determining the location of HARQ-ACK feedback when multiple carriers are indicated for SPS PDSCH release, leading to inefficiencies and inconsistencies in HARQ-ACK transmission.
Innovation Solution
A method is provided to determine the HARQ-ACK feedback location in the HARQ-ACK codebook by using the SLIV for the first SPS PDSCH among the released SPS PDSCHs, with options for the target carrier being the carrier of DCI transmission, the carrier with the largest or smallest index, or each carrier, ensuring consistent HARQ-ACK transmission across multiple carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If one piece of DCI indicates SPS PDSCHs release on multiple carriers, then scheduling efficiency is improved and DCI overhead is reduced, but the method for determining HARQ-ACK feedback location becomes unclear and inconsistent
Solution Approach 1:
The patent applies parameter changes by utilizing the SLIV parameter of the first SPS PDSCH to determine the HARQ-ACK feedback location. Specifically, the time domain resource allocation indication field in the DCI is processed through SLIV encoding to identify the corresponding feedback location in the HARQ-ACK codebook, transforming the location determination problem into a parameter mapping problem that can be systematically solved.
Solution Approach 2:
The patent introduces the SLIV (Start and Length Indicator Value) as an intermediary element between the DCI and the HARQ-ACK codebook. The SLIV acts as a mediator that translates the time domain resource allocation information from the DCI into a specific location indicator within the HARQ-ACK codebook, enabling consistent feedback location determination across multiple carriers.
2Quantity of substance
If one piece of DCI indicates SPS PDSCHs release on multiple carriers, then DCI overhead is reduced, but HARQ-ACK transmission consistency between terminal and network-side device deteriorates
Solution Approach 1:
The patent transforms the HARQ-ACK feedback location determination into a parameter-based mapping problem. By using the SLIV parameter of the first SPS PDSCH and mapping it to the time domain resource allocation indication field in the DCI, the patent establishes a deterministic relationship that ensures both terminal and network-side devices can consistently identify the feedback location without additional signaling overhead.
Solution Approach 2:
The patent creates a universal method for HARQ-ACK feedback location determination that works across multiple carriers simultaneously. The same SLIV-based mapping mechanism applies regardless of which carriers are involved in the SPS PDSCH release, providing a multi-functional solution that maintains consistency across different carrier configurations and DCI formats.
Data Source
AI summary
Provided in the present application are a method for determining a feedback information transmission location and a device, used when one piece of DCI simultaneously indicates resource release with respect to SPS PDSCHs on a plurality of carrier waves, to implement determining a location of an HARQ-ACK for the DCI in an HARQ-ACK codebook. A method of the present application comprises: Determining that a DCI indicates performing resource release with respect to SPS PDSCHs on a plurality of carrier waves; determining a target location of an HARQ-ACK corresponding to the DCI in an HARQ-ACK codebook according to an SLIV for a first SPS PDSCH among released SPS PDSCHs, wherein the first SPS PDSCH is an SPS PDSCH on a target carrier wave among the plurality of carrier waves. Normal feedback of the HARQ-ACK for the DCI is ensured, and uniform understanding for HARQ-ACK transmission by a network-side device and a terminal ensures normal transmission of the HARQ-ACK.