PDCCH Transmission via CORESET REG Segmentation
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Solution Overview
Problem
The existing Physical Downlink Control Channel (PDCCH) transmission in wireless communication technology faces limitations in resource allocation efficiency due to a limited capacity of Control Resource Sets (CORESET), leading to repeated transmissions and high delay, which are not sufficient for mid-end IoT devices requiring higher data rates and lower latency.
Innovation Solution
A method and apparatus for transmitting PDCCH that involves determining a CORESET, numbering resource element groups (REGs), combining REGs into REG packets, and mapping them into control channel elements (CCEs, allowing for enhanced resource mapping and aggregation, thereby improving transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the base station uses traditional PDCCH transmission with limited CORESET capacity, then the system maintains simple resource allocation, but the transmission efficiency is low and latency is high due to repeated transmissions
Solution Approach 1:
The patent segments the CORESET into multiple REG bundles and further divides CCEs into multiple parts (first CCE and second CCE). This segmentation allows parallel transmission of different CCE parts across multiple PDSCH occasions, enabling the base station to overcome the limited CORESET capacity by distributing control information across multiple resource elements, thereby improving transmission efficiency and reducing latency
Solution Approach 2:
The patent introduces a new dimension of transmission by mapping different CCE parts to multiple PDSCH occasions in the time domain. Instead of transmitting all control information within a single CORESET instance, the system utilizes multiple time slots (PDSCH occasions) to transmit segmented CCE parts, effectively expanding the available resource capacity and enabling faster transmission
2Productivity
If the base station increases CORESET capacity to reduce repeated transmissions, then the data transmission rate increases and latency decreases, but the resource allocation complexity increases
Solution Approach 1:
The patent segments CCEs into multiple parts (first CCE and second CCE) that can be independently mapped to different PDSCH occasions. This segmentation strategy increases effective transmission capacity without requiring a proportional increase in overall CORESET resources, as the same physical resources are utilized more efficiently through time-domain multiplexing of segmented control elements
Solution Approach 2:
The patent implements dynamic mapping where the mapping between CCE parts and PDSCH occasions can be flexibly configured based on channel conditions and traffic requirements. This dynamic approach allows the system to adapt resource allocation to actual needs, improving data transmission rate while avoiding the rigidity of static high-capacity CORESET configurations
3Loss of time
If the system uses multiple PDSCH occasions for PDCCH transmission, then the resource mapping efficiency improves and latency reduces, but the signaling overhead and configuration complexity increase
Solution Approach 1:
The patent segments control channel elements across multiple PDSCH occasions, allowing the system to reduce transmission delay by distributing control information over time. The segmentation enables parallel processing and transmission of different CCE parts, reducing the time required for complete control information delivery while maintaining manageable configuration through structured segmentation patterns
Data Source
AI summary
A method for transmitting a physical downlink control channel includes: a base station determining a CORESET configured for a terminal; then numbering resource element groups (REGs) in the CORESET according to a numbering rule corresponding to the CORESET; next, combining the REGs into an REG packet according to an REG mapping rule corresponding to the CORESET, and performing resource mapping on a physical downlink control channel corresponding to the terminal to obtain a control channel element (CCE); and finally, the base station transmitting the physical downlink control channel to the terminal.