Search Space Switching for Wireless Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-frequency wireless communication systems face challenges with beamforming and multiple TRPs, particularly in millimeter wave communication, due to issues like beam misalignment, interference, and channel occupation, which affect reliable data and control signaling.
Innovation Solution
A method for a feedback radio node to monitor and switch between different search spaces based on conditions such as beam quality and signaling presence, using condition configurations to adapt to operational conditions and ensure reliable communication by fallback to more reliable control information formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beamforming and multiple TRPs are used for high-frequency communication, then bandwidth and data rate are improved, but beam misalignment and connection reliability deteriorate
Solution Approach 1:
The patent implements dynamic search space switching where the UE adapts between first and second search spaces based on detected beam quality and signaling conditions. This dynamic adaptation allows the system to maintain reliable control signaling by switching to a more robust search space when beam misalignment is detected, while utilizing the higher-capacity search space when conditions are favorable, thus resolving the contradiction between productivity and reliability.
2Productivity
If small beams are used for precise communication, then spectral efficiency is improved, but beam alignment precision and interference management become more difficult
Solution Approach 1:
The patent segments the control search space into two distinct types: a first search space with broader monitoring requirements and a second search space with more precise beam-specific monitoring. This segmentation allows the system to use small, spectrally efficient beams for data transmission while maintaining a fallback mechanism through the first search space that can detect and respond to beam misalignment, thus managing both spectral efficiency and alignment precision.
3Reliability
If multiple search spaces are monitored simultaneously, then control information coverage is improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent employs dynamic search space activation where the UE monitors the first search space under certain conditions (such as beam failure detection) and the second search space under other conditions (normal operation). This dynamic approach ensures comprehensive control information coverage when needed while reducing processing overhead by not continuously monitoring both search spaces at full capacity, thus resolving the contradiction between reliability and device complexity.
Data Source
AI summary
There is disclosed a method of operating a feedback radio node in a wireless communication network. The method of operating a feedback radio node in a wireless communication network may include monitoring a first search space associated to a first type of control information based on operation pertaining to a second search space associated to a second type of control information. The first type of control information may pertain to a first signalling format for control information, and/or the second type of control information may pertain to a second signalling format for control information. The disclosure also pertains to related devices and methods, in particular to a feedback radio node, a method of operating a signalling radio node and a signalling radio node.