PUCCH Resource Allocation via ARI and Implicit Mapping
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently allocating resources for the physical uplink control channel (PUCCH), particularly before radio resource control (RRC) connection setup, due to unresolved issues related to explicit and implicit mapping methods, which can lead to resource collisions and suboptimal performance.
Innovation Solution
The proposed solution involves a method that identifies a subset of resources for PUCCH based on explicit and implicit mappings of acknowledgment resource indicator (ARI) values to remaining minimum system information (RMSI) values, deriving a resource index corresponding to a control channel element (CCE) or resource block group (RBG) index, and transmitting PUCCH communications using these resources, thereby optimizing resource allocation before and after RRC connection setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If explicit mapping of ARI values to RMSI values is used for PUCCH resource allocation, then resource allocation flexibility is improved, but resource collision risk increases
Solution Approach 1:
The PUCCH resource set is divided into multiple resource subsets, where each subset corresponds to a specific RMSI value. This segmentation allows UEs to select resources from appropriate subsets based on their RMSI, reducing collisions while maintaining allocation flexibility through the explicit ARI mapping mechanism.
2Ease of operation
If implicit mapping of resource index to CCE index is used for PUCCH resource allocation, then resource allocation simplicity is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent combines static implicit mapping (resource index to CCE index) with dynamic explicit mapping (ARI values to RMSI values). This allows the system to maintain allocation simplicity through implicit mapping while improving resource utilization efficiency through dynamic adjustments enabled by explicit ARI-based resource subset selection.
3Reliability
If comprehensive PUCCH resource allocation agreements are made, then system reliability is improved, but implementation complexity increases
Solution Approach 1:
The patent establishes comprehensive resource allocation agreements in advance, defining explicit mapping rules for ARI values to RMSI and implicit mapping rules for resource indices to CCE indices. These pre-defined agreements ensure reliable resource allocation while reducing implementation complexity by providing clear, standardized procedures that eliminate the need for complex real-time decision-making.
Data Source
AI summary
Aspects of the disclosure relate to allocating resources for a physical uplink control channel (PUCCH). In a first example, a subset of a resource set corresponding to a PUCCH is identified based on an explicit mapping of acknowledgment resource indicator (ARI) values, and a resource index corresponding to a resource within the subset is derived based on an implicit mapping of the resource index. A PUCCH communication is then transmitted via the resource. In another example, a user equipment (UE) is configured to ascertain resources for a PUCCH in accordance with an explicit mapping of ARI values and an implicit mapping of a resource index such that the explicit mapping facilitates an identification of a subset of a resource set, whereas the implicit mapping facilitates a derivation of the resource index to identify a corresponding resource within the subset.