5G Terminal Type0-PDCCH Detection Slot Determination
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Solution Overview
Problem
In 5G NR technologies, terminals detect Type0-PDCCH excessively in unlicensed spectrum bands, leading to increased energy consumption due to repeated blind detections across multiple consecutive slots and SSB indexes with Quasi-Co-Location relationships.
Innovation Solution
A method and apparatus for determining a slot of detection opportunity for Type0-PDCCH based on Sub-Carrier Space, Discovery Reference Signal window length, and Quasi-Co-Location relationships between SSB indexes, reducing the number of detections by utilizing specific SSB indexes and their relationships to optimize detection slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal performs blind detection of Type0-PDCCH in multiple consecutive slots and across multiple SSB indexes with QCL relationships, then the reliability of control channel reception is improved, but the energy consumption of the terminal increases significantly
Solution Approach 1:
The patent applies partial action by performing blind detection only in specific slots determined by the formula n_slot = (k × N) mod M, rather than in all consecutive slots. This selective approach maintains sufficient detection opportunities for reliable control channel reception while significantly reducing the total number of detections compared to checking every slot, thereby lowering terminal energy consumption.
Solution Approach 2:
The patent changes the detection parameter from 'all consecutive slots' to 'specific slots determined by modular arithmetic'. By introducing the parameter k (detection opportunity index) and using the formula with modulo operation, the system transforms the detection pattern to achieve a balance between reliability and energy efficiency.
2Measurement precision
If the terminal detects Type0-PDCCH in every slot within the DRS window, then the detection precision is improved, but the loss of time and increased complexity occur
Solution Approach 1:
The patent performs blind detection only in specific slots determined by the formula n_slot = (k × N) mod M, rather than in all consecutive slots. This selective approach maintains sufficient detection opportunities for reliable control channel reception while significantly reducing the total number of detections compared to checking every slot, thereby lowering terminal energy consumption.
3Reliability
If the terminal performs blind detection across multiple SSB indexes with QCL relationships, then the reliability of detection is improved, but the device complexity increases
Solution Approach 1:
The patent applies partial action by performing blind detection only in specific slots determined by the formula n_slot = (k × N) mod M, rather than in all consecutive slots. This selective approach maintains sufficient detection opportunities for reliable control channel reception while significantly reducing the total number of detections compared to checking every slot, thereby lowering terminal energy consumption.
Data Source
AI summary
Implementations of the present application disclose a method and device for determining a time slot for a monitoring occasion, a terminal, and a storage medium. The method includes: a terminal determining a time slot for a Type0-PDCCH monitoring occasion according to SCS, a DRS window length, and an indication value of a QCL relationship between different SSB indexes.