PDCCH Candidate Monitoring With Rate-Matching Overlap Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in effectively providing seamless services due to overlapping resource elements in the physical downlink control channel (PDCCH) configuration, which affects the efficiency and reliability of downlink control channel transmission.
Innovation Solution
A method and apparatus for a terminal and base station to identify and manage resource elements (REs) overlapping with rate matching resources in PDCCH candidates based on configuration information, determining whether the number of ports exceeds a preset value, and adjusting monitoring or transmission accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resource elements are allocated for PDCCH configuration, then downlink control channel transmission is enabled, but overlapping REs with rate matching resources reduce transmission reliability
Solution Approach 1:
The base station performs preliminary identification of overlapping resource elements between PDCCH candidates and rate matching resources before transmission. Configuration information indicating these overlapping REs is prepared in advance and transmitted to the terminal, enabling the terminal to pre-adjust its monitoring strategy and avoid decoding attempts on overlapping REs, thereby improving transmission reliability without increasing operational complexity
Solution Approach 2:
Configuration information serves as an intermediary between the base station and terminal regarding overlapping REs. This information acts as a mediator that conveys the location and characteristics of overlapping resource elements, enabling the terminal to make informed decisions about PDCCH candidate monitoring without directly complex interactions between the base station and terminal
2Productivity
If all PDCCH candidates are monitored, then control information reception is maximized, but processing overhead increases when overlapping REs are present
Solution Approach 1:
Instead of monitoring all PDCCH candidates equally, the terminal applies partial action by selectively monitoring only those candidates that do not overlap with rate matching resources, as indicated by the configuration information. This partial monitoring approach maintains control information reception efficiency while significantly reducing processing energy consumption by avoiding unnecessary decoding attempts on overlapping candidates
Solution Approach 2:
The set of PDCCH candidates is segmented into two groups: those that overlap with rate matching resources and those that do not. The configuration information enables this segmentation by providing details about overlapping REs, allowing the terminal to focus processing resources on non-overlapping candidates and improve overall processing efficiency
3Quantity of substance
If rate matching resources are allocated, then data transmission capacity is increased, but overlapping REs reduce PDCCH transmission effectiveness
Solution Approach 1:
The problematic overlapping resource elements are extracted and identified separately from the general resource allocation. The configuration information explicitly indicates which REs are overlapping between PDCCH candidates and rate matching resources, allowing the system to isolate and handle these problematic elements differently, thereby maintaining data transmission capacity while protecting PDCCH transmission effectiveness
Data Source
AI summary
The disclosure relates to a method of performing communication in a wireless communication system. According to an embodiment of the disclosure, a terminal may receive physical downlink control channel (PDCCH) configuration information and rate matching configuration information from a base station, identify resource elements (REs) overlapping a rate matching resource from among REs included in PDCCH candidates, based on the PDCCH configuration information and the rate matching configuration information, and monitor a PDCCH candidate including the identified REs from among the PDCCH candidates, based on whether a number of ports of signals transmitted via the rate matching resource exceeds a preset value.