5G PDCCH Blind Detection with Configurable Monitoring Spans
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Solution Overview
Problem
In the 5G New Radio (NR) mobile communications system, terminal devices face challenges in efficiently monitoring downlink control channels due to unknown time-frequency resources, leading to increased power consumption and data transmission delays, especially for ultra-reliable and low-latency communications (URLLC) services.
Innovation Solution
A method and apparatus for downlink control channel monitoring that involves a terminal device sending indication information to a network device about its monitoring capability parameters, allowing the network device to determine optimal monitoring spans and capabilities, ensuring efficient blind detection within the device's limits, thereby reducing power consumption and transmission delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device performs blind detection on the PDCCH at all possible time-frequency resource locations, then the probability of detecting the downlink control channel is improved, but the power consumption increases and the data transmission delay increases
Solution Approach 1:
The patent divides the time-frequency resource into multiple monitoring spans, each containing multiple monitoring occasions. Instead of uniformly monitoring all possible locations, the terminal device segments the monitoring process into discrete spans with configurable durations and intervals, allowing selective monitoring that reduces overall power consumption while maintaining detection probability.
Solution Approach 2:
The patent introduces dynamic monitoring capability parameters that allow the terminal device to adapt its monitoring behavior based on service requirements. The network device can configure different monitoring span durations and intervals dynamically, enabling the terminal to adjust between aggressive monitoring (higher power, higher reliability) and conservative monitoring (lower power, lower reliability) modes as needed.
2Reliability
If the terminal device performs blind detection on the PDCCH at all possible time-frequency resource locations, then the probability of detecting the downlink control channel is improved, but the data transmission delay increases
Solution Approach 1:
By segmenting monitoring into discrete spans with defined durations and intervals, the patent enables the terminal to concentrate detection efforts in specific time windows rather than continuously scanning all possible locations. This segmentation allows for more efficient use of monitoring opportunities, reducing the time required to detect the PDCCH while maintaining detection probability.
Solution Approach 2:
The patent implements periodic monitoring spans at configured intervals, creating a structured rhythm of detection activities. This periodic approach allows the terminal to systematically cover monitoring opportunities without random delays, improving the predictability and efficiency of PDCCH detection timing.
3Adaptability or versatility
If the network device configures multiple monitoring capability parameter groups, then the adaptability to different service requirements is improved, but the device complexity increases
Solution Approach 1:
The patent creates a universal monitoring capability parameter framework that can serve multiple service types (eMBB, URLLC, mMTC) through a single configurable structure. By defining monitoring spans with configurable durations and intervals that can be dynamically adjusted, the system achieves multi-functionality without requiring separate monitoring mechanisms for each service type, thus reducing overall complexity.
Solution Approach 2:
The patent manages complexity by changing parameters (monitoring span duration, interval, capability values) within an existing framework rather than creating separate configurations for different services. The network device can adjust monitoring capability parameters dynamically based on service requirements, maintaining adaptability while avoiding the complexity of multiple independent configuration systems.
Data Source
AI summary
Embodiments of this application provide a downlink control channel monitoring method and apparatus. A terminal device sends N groups of blind monitoring capability parameters to a network device. The monitoring capability parameters include: a reference value of an interval between monitoring spans, a reference value of duration of a monitoring span, and a reference value of a monitoring capability in the monitoring span. The terminal device determines K monitoring spans in a slot based on the N groups of monitoring capability parameters, and allocates a monitoring capability of the terminal device to the K monitoring spans based on the N groups of monitoring capability parameters. The terminal device may further perform blind detection on a downlink control channel in the K monitoring spans based on monitoring capabilities in the K monitoring spans.