REG Bundling for PDCCH Blind Detection in Wireless Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in accurately and efficiently transmitting and receiving downlink control information due to limitations in resource element group (REG) bundling techniques.
Innovation Solution
The method involves receiving bundling information for REGs through higher layer signaling, performing blind detection for the physical downlink control channel (PDCCH) in a control resource set (CORESET) configured on multiple OFDM symbols, and acquiring downlink control information (DCI) by assuming same precoding for REGs within a REG bundle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If REG bundling is performed across multiple RBs and OFDM symbols, then channel estimation accuracy is improved, but the complexity of blind detection increases
Solution Approach 1:
The patent segments the REG bundling process into two independent dimensions: time-domain bundling (across OFDM symbols) and frequency-domain bundling (across RBs). This segmentation allows the UE to perform blind detection by assuming same precoding for time-bundled REGs while independently handling frequency-domain variations, thereby reducing detection complexity while maintaining channel estimation accuracy through structured bundling.
Solution Approach 2:
The patent introduces dynamic REG bundling configuration where the bundling behavior can change based on higher layer signaling. The UE can be configured to bundle REGs across different combinations of RBs and OFDM symbols depending on channel conditions and system requirements, enabling adaptive optimization of channel estimation without fixed complexity overhead.
2Quantity of substance
If REG bundling is performed across multiple RBs, then coding rate is reduced, but the number of REG bundles increases
Solution Approach 1:
The patent segments the REG bundling into time-domain and frequency-domain components, allowing flexible configuration of which dimension to bundle. By enabling selective bundling (e.g., time-only or frequency-only), the system can reduce coding rate through bundling while controlling the number of resulting REG bundles through configuration, avoiding excessive complexity from comprehensive multi-dimensional bundling.
Solution Approach 2:
The patent changes the bundling parameters (which RBs and OFDM symbols are bundled) based on higher layer signaling and channel conditions. This allows dynamic adjustment of the number of REG bundles and coding rate to achieve optimal performance without fixed overhead, enabling the system to adapt between low coding rate scenarios and scenarios with fewer bundles as needed.
Data Source
AI summary
According to one embodiment of the present invention, a method of receiving DCI by a UE includes receiving bundling information regarding REGs via higher layer signaling, performing blind detection for a PDCCH in a CORESET configured on a plurality of OFDM symbols, and acquiring DCI from the PDCCH. When the bundling information indicates a first value, the UE may perform bundling such that only REGs locating on a same RB and corresponding to different OFDM symbols in the CORESET, are bundled as 1 REG bundle, and when the bundling information indicates a second value, the UE may perform bundling such that the REGs locating on the same RB and corresponding to the different OFDM symbols are bundled as 1 REG bundle along with REGs locating on different RBs in the CORESET, and the UE may perform the blind detection of the PDCCH by assuming same precoding for REGs belonging to a same REG bundle as a result of REG bundling.