PDCCH Hash Function Update for Dynamic Scheduling Adaptability
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Solution Overview
Problem
Current wireless communication systems, particularly in New Radio (NR) networks, face challenges in efficiently updating and managing hash functions for physical downlink control channel (PDCCH) searches due to the flexible nature of PDCCH scheduling and transmission, which complicates the identification and updating of hash value indices.
Innovation Solution
A method and apparatus for identifying and updating hash value indices for PDCCH searches in NR networks, where the index is determined based on intervals or search space set occasions within a periodicity, allowing for configuration and reconfiguration of hash functions to accurately locate PDCCH candidates across varying search spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hash function updating is implemented to handle flexible PDCCH scheduling, then adaptability is improved, but device complexity increases
Solution Approach 1:
The hash function is made dynamic by introducing an update indicator that triggers reconfiguration based on scheduling conditions. The hash function index is updated periodically or event-driven, allowing the system to adapt to changing scheduling patterns without manual reconfiguration. This dynamic approach resolves the contradiction by enabling adaptability through automated updates while managing complexity through structured update mechanisms.
Solution Approach 2:
The system changes parameters of the hash function (such as the hash function index or update timing) based on scheduling requirements. By modifying hash function parameters dynamically rather than the entire function structure, the system achieves adaptability to different scheduling scenarios while limiting the increase in device complexity to parameter management rather than full function reconfiguration.
2Measurement precision
If frequent hash function updates are performed to track PDCCH locations, then measurement precision is improved, but use of energy increases
Solution Approach 1:
Hash function updates are performed periodically rather than continuously, with update timing synchronized to scheduling patterns. The update indicator triggers hash function reconfiguration at predetermined intervals or specific events, maintaining accurate PDCCH location identification while reducing energy consumption by avoiding unnecessary continuous updates. This periodic approach resolves the contradiction between precision and energy usage.
3Adaptability or versatility
If flexible search space configuration is implemented, then adaptability is improved, but difficulty of detecting and measuring increases
Solution Approach 1:
The search space is segmented into multiple configurable parameters (hash function index, update indicator, search space set indices) that can be independently managed. This segmentation allows the system to maintain flexibility in configuring different search space patterns while simplifying detection by breaking down the complex search problem into manageable parameter sets. Each parameter can be detected and measured independently, reducing overall complexity.
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may identify a hash value index associated with searching for a physical downlink control channel. The hash value index may be identified based at least in part on an index of an interval of a plurality of intervals within a periodicity. The user equipment may configure, based at least in part on the hash value index, a hash function associated with determining the hash value. Numerous other aspects are provided.