PDCCH Detection in 5G BWP Switching
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Solution Overview
Problem
Current 5G wireless communication systems face challenges in effectively detecting downlink control channels, particularly in scenarios with multiple downlink bandwidth parts (BWP) and varying subcarrier spacing configurations, leading to inconsistencies in PDCCH and CCE detection between base stations and user equipment.
Innovation Solution
A method for determining the downlink receiving state on an active BWP, involving wake-up signal detection and PDCCH detection, based on carrier sensing, physical layer signaling, and higher-layer signaling, to optimize PDCCH detection and CCE detection across multiple serving cells with diverse subcarrier spacing configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple downlink bandwidth parts (BWP) with varying subcarrier spacing configurations are deployed, then spectrum utilization and data rates are improved, but detection consistency between base station and user equipment deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically switching between different subcarrier spacing configurations (e.g., 15 kHz, 30 kHz, 60 kHz) when switching between downlink BWPs. The base station and user equipment both adjust their detection parameters to match the active BWP's subcarrier spacing, ensuring consistent PDCCH and CCE detection across multiple BWPs while maintaining high spectrum utilization
Solution Approach 2:
The patent implements dynamics by enabling dynamic BWP switching based on carrier sensing results and downlink receiving state determination. The system transitions from static detection configurations to dynamic adaptive detection that adjusts to the current active BWP, resolving the contradiction between multiple spectrum configurations and detection consistency
2Adaptability or versatility
If carrier sensing is performed for each BWP separately, then BWP switching flexibility is improved, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by performing carrier sensing in advance before BWP switching occurs. The base station determines the downlink receiving state based on preliminary carrier sensing results, and the user equipment pre-determines the active BWP configuration before actual data reception begins, reducing the need for continuous sensing and lowering power consumption while maintaining switching flexibility
Solution Approach 2:
The system implements self-service by having the base station and user equipment autonomously determine the downlink receiving state and active BWP configuration without requiring continuous external control. The carrier sensing and BWP selection processes are self-managed based on predefined protocols and conditions, reducing overall system power consumption
3Reliability
If PDCCH detection is performed on all configured BWPs, then detection completeness is improved, but processing time increases
Solution Approach 1:
The patent applies the extraction principle by isolating and focusing PDCCH detection only on the active downlink BWP rather than performing detection across all configured BWPs. The base station and user equipment extract the relevant detection task to the currently active BWP based on carrier sensing results, maintaining detection completeness for the active channel while significantly reducing processing time and computational load
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure provides a method for downlink reception, including: determining a downlink receiving state on an active downlink Bandwidth Part ‘BWP’ to which switching is made; and performing downlink reception according to the determined downlink receiving state on the active downlink BWP to which switching is made. The present disclosure also provides a method for performing PDCCH detection, and a corresponding UE and a computer readable medium.