Adaptive PDCCH Search Spaces for High-Spacing Wideband Links
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Solution Overview
Problem
Existing wireless communication systems face challenges in supporting high data rates and reliability in high-frequency bands due to limited processing capabilities of wireless devices (WDs) for PDCCH monitoring, especially with increased sub-carrier spacing, leading to difficulties in decoding PDCCH candidates and channel estimation.
Innovation Solution
Implementing search space configurations that utilize non-linear functions to determine processing capabilities for PDCCH based on reference numerologies, operating numerologies, and slot bundles, allowing for optimized PDCCH monitoring periodicity and offset configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sub-carrier spacing is increased to support high-frequency bands and high data rates, then spectral efficiency and data rate are improved, but PDCCH processing capability and decoding reliability deteriorate
Solution Approach 1:
The patent applies dynamics by making the search space configuration adaptive rather than fixed. The network node dynamically determines search space parameters (such as monitoring periodicity and offset) based on the actual operating numerology and slot bundle size. This allows the system to optimize PDCCH monitoring capabilities for each specific configuration, resolving the contradiction between high data rates and decoding reliability.
Solution Approach 2:
The patent changes key parameters including monitoring periodicity, offset, and search space configuration based on the operating numerology and slot bundle size. By adjusting these parameters dynamically, the system maintains PDCCH processing capability while supporting higher sub-carrier spacings for increased data rates.
2Reliability
If monitoring periodicity is reduced to improve PDCCH processing capability, then decoding reliability is improved, but time efficiency and system capacity deteriorate
Solution Approach 1:
The monitoring periodicity is made dynamic rather than fixed. The network node calculates the optimal periodicity based on the operating numerology and slot bundle size, allowing the system to adjust monitoring frequency to match actual processing capabilities while minimizing time loss.
Solution Approach 2:
The patent changes the monitoring periodicity parameter dynamically. Instead of using a fixed periodicity, the system adjusts this parameter based on the operating conditions (numerology and slot bundle size), optimizing the balance between processing capability and time efficiency.
3Adaptability or versatility
If search space configuration is made more flexible to support multiple numerologies, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent implements universality by designing a search space configuration mechanism that works across multiple numerologies. The network node uses a unified approach with standardized parameters (monitoring periodicity, offset, and configuration based on operating numerology and slot bundle size) that can accommodate different sub-carrier spacings without requiring separate complex configurations for each numerology type.
Data Source
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AI summary
A method, network node and wireless device (WD) for search space configurations for wideband communications are disclosed. According to one aspect, a method in a network node (16) includes determining a WD processing capability,-slot and,-slot, for processing a physical downlink control channel, PDCCH, according to: an operating numerology, μ ; and a number B of slots. The method also includes configuring the WD (22) to monitor for PDCCH based at least in part on the determined processing capability; and transmitting PDCCH to the WD (22) in at least one of two slots n0 and n0+x in which the WD (22) monitors for PDCCH, where x is greater than zero.