HARQ-ACK Feedback Timing for Multiple PDSCH Reception
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Solution Overview
Problem
Existing wireless communication systems lack a specific scheme to extend the K1 set for determining HARQ-ACK feedback timing in FR 2-2 (52.6-71 GHz) for multiple PDSCHs and fail to associate the extended K1 set with the appropriate PDSCH receptions, leading to inefficiencies in generating semi-static HARQ-ACK codebooks.
Innovation Solution
The proposed solution involves extending the K1 set based on the time domain resource assignment (TDRA) table and determining an association between the extended K1 set and PDSCH receptions, allowing for efficient generation of semi-static HARQ-ACK codebooks for multiple PDSCHs by using a modified parameter set that includes more elements than the default K1 set.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the K1 set is extended to support multiple PDSCHs, then spectral efficiency and capacity are improved, but the complexity of determining feedback timing and associating PDSCH receptions increases
Solution Approach 1:
The patent segments the feedback timing determination process by introducing a time domain resource assignment (TDRA) table that divides PDSCH receptions into distinct groups. Each row in the TDRA table represents a specific PDSCH reception configuration with associated K1 values, allowing the system to handle multiple PDSCHs by referencing specific table rows rather than computing feedback timing for all possible combinations, thus reducing complexity while maintaining extended capacity
Solution Approach 2:
The patent applies preliminary action by pre-configuring the TDRA table with multiple K1 sets before actual data transmission. The gNB prepares the association between PDSCH receptions and K1 values in advance, so that during operation, the UE can directly look up feedback timing information without performing complex real-time calculations, thereby improving spectral efficiency while keeping device complexity manageable
2Adaptability or versatility
If the parameter set is modified to include more elements for multiple PDSCHs, then the capacity to handle multiple receptions is improved, but the difficulty of determining associations between extended elements and PDSCH receptions increases
Solution Approach 1:
The patent introduces the TDRA table as an intermediary structure that mediates between the extended parameter set and PDSCH receptions. The table rows serve as intermediaries that link specific PDSCH reception patterns to specific K1 values, making the association relationship explicit and easy to detect. Instead of directly mapping extended parameter elements to PDSCHs, the system uses TDRA table row indices as intermediaries, significantly reducing the difficulty of determining associations
Solution Approach 2:
The patent changes the parameter representation by extending the K1 set from a simple list to a structured TDRA table with multiple rows and columns. Each row represents a different PDSCH reception scenario with associated K1 values, transforming the parameter structure to make associations more detectable. The parameter change from flat K1 list to tabular TDRA structure enables the system to handle multiple PDSCHs while maintaining clear association relationships
Data Source
AI summary
A method of wireless communication is described. The method includes obtaining, by a user device, a parameter set used to determine a feedback timing, the parameter set including N elements; and modifying the parameter set to include M elements, M being greater than N, based on a time domain resource assignment table that includes information on multiple physical downlink shared channel receptions, whereby N and M are positive integers.