PDCCH Blind Detection Capability Configuration for URLLC Latency
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Solution Overview
Problem
In 5G mobile communications, terminal devices face challenges in quickly and reliably performing PDCCH blind detection while meeting ultra-reliable and low latency communications (URLLC) requirements, and reducing power consumption and processing complexity.
Innovation Solution
The method involves determining a blind detection capability for terminal devices, which includes increasing the number of blind detection times and channel estimation control channel elements (CCEs) based on specific ratios, allowing for more opportunities for scheduling URLLC services and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the terminal device performs PDCCH blind detection multiple times in one slot to improve scheduling opportunities, then the URLLC service latency is reduced, but the power consumption and processing complexity increase
Solution Approach 1:
The patent applies dynamics by making the blind detection capability configurable and adaptable. The terminal device's blind detection capability is not fixed but can be dynamically adjusted based on service requirements. The network device can configure different blind detection capabilities for different terminal devices or different service types, allowing the system to optimize between latency and power consumption based on actual URLLC needs rather than using a static approach for all scenarios.
2Loss of time
If the terminal device increases the number of blind detection times to improve scheduling opportunities, then the URLLC service latency is reduced, but the processing complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the blind detection capability parameters. Specifically, the terminal device's blind detection capability is defined by parameters such as the maximum number of blind detections per slot and the number of CCEs for channel estimation. These parameters can be changed through network configuration to balance latency reduction with processing complexity management, allowing optimization for different URLLC scenarios without requiring hardware changes.
3Reliability
If the network device configures higher blind detection capability to ensure URLLC reliability, then the scheduling opportunities increase, but the terminal device's processing load increases
Solution Approach 1:
The patent applies dynamics by making the blind detection capability configurable and adaptable. The terminal device's blind detection capability is not fixed but can be dynamically adjusted based on service requirements. The network device can configure different blind detection capabilities for different terminal devices or different service types, allowing the system to optimize between latency and power consumption based on actual URLLC needs rather than using a static approach for all scenarios.
Solution Approach 2:
The patent applies local quality by allowing different terminal devices or different service types to have different blind detection capability configurations. Instead of uniformly increasing blind detection capability for all devices, the network can selectively configure higher capabilities only for terminal devices or service types that have strict URLLC reliability requirements, while other devices can use lower configurations to reduce processing load.
Data Source
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AI summary
A PDCCH sending method and apparatus, and a PDCCH blind detection method and apparatus are provided, and the method includes: determining, by a terminal device, a blind detection capability of the terminal device; performing, by the terminal device, PDCCH blind detection in one time unit based on PDCCH configuration information and the blind detection capability of the terminal device, where the blind detection capability of the terminal device includes N maximum quantities, of blind detection times, corresponding to N subcarrier spacings in the time unit and/or N maximum quantities, of channel estimation control channel elements CCEs, corresponding to the N subcarrier spacings in the time unit, where N is a positive integer.