PUCCH Resource Selection Using HARQ-ACK Codebook Type
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Solution Overview
Problem
The existing methods for determining physical uplink control channel (PUCCH) resources in wireless communication systems fail to address the ambiguity in selecting between slot-level and subslot-level PUCCH resources for hybrid automatic repeat request (HARQ) feedback, particularly in scenarios where both types are configured for different service types like URLLC and eMBB, leading to suboptimal latency and reliability requirements.
Innovation Solution
A method and apparatus for determining PUCCH resources based on HARQ-ACK codebook type indication, where the codebook type is associated with specific PUCCH resource levels (slot-level or subslot-level) through DCI attributes such as format, RNTI, CORESET, and search space, ensuring appropriate resource allocation for HARQ-ACK feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If PUCCH resources are determined based on the first uplink carrier indicator, then resource allocation is simplified, but resource collision and waste occur when multiple carriers are involved
Solution Approach 1:
The patent segments PUCCH resource determination by carrier type. When the first uplink carrier indicator is 0, resources are determined using the first rule (based on first carrier's uplink-downlink configuration). When the indicator is non-zero, resources are determined using the second rule (based on second carrier's uplink-downlink configuration). This segmentation resolves the contradiction by providing simplified allocation for single-carrier cases while enabling collision avoidance for multi-carrier cases.
Solution Approach 2:
The patent dynamically selects between different resource determination rules based on the value of the first uplink carrier indicator in the DCI format. The system adapts the resource allocation method according to whether the indicator is 0 or non-zero, allowing flexible response to different carrier scenarios and resolving the static limitation of previous single-rule approaches.
2Reliability
If PUCCH resources are determined based on the second uplink carrier indicator, then multi-carrier resource allocation is improved, but determination complexity increases
Solution Approach 1:
The patent segments the resource determination process into two distinct paths based on the first uplink carrier indicator value. This segmentation avoids the need to always evaluate the second carrier indicator, reducing average determination complexity while maintaining the ability to resolve multi-carrier resource conflicts when necessary.
Solution Approach 2:
The patent applies partial action by using only the first uplink carrier indicator for the primary resource determination in most cases (when indicator is 0). The second carrier indicator and its associated complex determination rules are activated only partially when needed (when first indicator is non-zero), reducing overall determination complexity while maintaining reliability.
3Adaptability or versatility
If different uplink-downlink configurations are used for different carriers, then carrier-specific optimization is achieved, but resource coordination becomes difficult
Solution Approach 1:
The patent uses the first uplink carrier indicator in the DCI format as an intermediary to coordinate resources across carriers with different uplink-downlink configurations. This intermediary enables the network to signal which carrier's configuration should be used for PUCCH resource determination, simplifying the coordination complexity while maintaining carrier-specific optimization flexibility.
Data Source
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AI summary
The present invention relates to a method and apparatus for determining physical uplink control channel (PUCCH) resources, and a storage medium. The method applied to a terminal comprises: obtaining codebook type indication information of hybrid automatic repeat-request acknowledgement (HARQ-ACK), the codebook type indicated by the codebook type indication information having a correspondence to PUCCH resources carrying the HARQ-ACK; and determining the PUCCH resources carrying the HARQ-ACK based on the codebook type indication information. The method applied to a network device comprises: determining codebook type indication information of HARQ-ACK, the codebook type indicated by the codebook type indication information having a correspondence to PUCCH resources carrying the HARQ-ACK; and sending the codebook type indication information. According to the present invention, suitable PUCCH resources can be determined for the HARQ-ACK.