HARQ-ACK PUCCH Resource Switching Under TDD SPS Timing Constraints
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Solution Overview
Problem
The increasing number of UEs and data volume in wireless communication systems necessitates a method to efficiently utilize limited radio resources for uplink/downlink data and control information transmission/reception, particularly in high-density node and UE environments, while supporting various services with different requirements and reducing latency.
Innovation Solution
A method for efficiently transmitting and receiving wireless communication signals, supporting various services with different requirements, and reducing latency by implementing techniques such as HARQ-ACK transmission and reception methods in user equipment and base stations, utilizing HARQ-ACK procedures and resource allocation strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ-ACK is transmitted using existing resources without dedicated configuration, then device complexity is reduced, but transmission reliability and resource utilization efficiency deteriorate
Solution Approach 1:
The patent segments the resource allocation by introducing a dedicated HARQ-ACK resource configuration that separates HARQ-ACK transmission resources from data transmission resources. This segmentation allows reliable HARQ-ACK transmission while maintaining clear resource boundaries, preventing interference and ensuring proper allocation without requiring complex dynamic negotiation.
Solution Approach 2:
The patent introduces a resource configuration information element as an intermediary that mediates between the base station and terminal. This intermediary carries dedicated HARQ-ACK resource allocation details, enabling reliable transmission without requiring complex direct coordination or additional signaling protocols, thus resolving the contradiction between reliability and complexity.
2Reliability
If HARQ-ACK is transmitted using dedicated configured resources, then transmission reliability is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where the base station can flexibly assign HARQ-ACK resources based on actual transmission needs. The system can adapt resource allocation dynamically, assigning dedicated resources when needed for reliability and sharing resources when data transmission is absent, thus optimizing the balance between reliability and resource utilization efficiency.
Solution Approach 2:
The patent allows changing resource allocation parameters dynamically. The base station can adjust the amount of dedicated HARQ-ACK resources based on transmission conditions, switching between dedicated and shared resource modes. This parameter flexibility enables the system to maintain reliability when necessary while improving overall resource utilization efficiency during normal operations.
3Productivity
If HARQ-ACK and data are transmitted using same resources, then resource utilization efficiency is improved, but transmission reliability deteriorates
Solution Approach 1:
The patent segments transmission resources into dedicated HARQ-ACK resources and data resources. This segmentation ensures that HARQ-ACK transmissions have guaranteed reliable resources while data transmissions utilize remaining resources efficiently. The segmentation prevents resource conflicts and ensures proper transmission reliability without sacrificing overall efficiency.
Solution Approach 2:
The patent performs preliminary resource allocation by configuring dedicated HARQ-ACK resources in advance through resource configuration information. This preliminary action ensures that when HARQ-ACK transmission is needed, reliable resources are already prepared and allocated, preventing conflicts with data transmissions and maintaining both reliability and efficiency without last-minute resource negotiation.
Data Source
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AI summary
UE performs operations including: receiving a TDD UL-DL configuration and an SPS configuration; performing SPS PDSCH reception on the basis of the SPS configuration; and transmitting an HARQ-ACK for the SPS PDSCH reception. The transmitting of the HARQ-ACK for the SPS PDSCH reception may include transmitting the HARQ-ACK for the SPS PDSCH reception on a second PUCCH resource that satisfies conditions, on the basis that a first PUCCH resource for the HARQ-ACK for the SPS PDSCH reception does not satisfy the conditions. The conditions may include that: i) symbols of a corresponding PUCCH resource do not include symbols indicated in downlink by the TDD UL-DL configuration; and ii) a time from a last symbol of the SPS PDSCH reception to a start symbol of the corresponding PUCCH resource is greater than or equal to a predetermined minimum time.