Multi-TRP Blind Decoding Limits via CORESET Segmentation
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently managing blind decoding for multiple downlink control information (DCI) across multiple transmit-receive points (TRPs), leading to increased resource utilization and decoding complexity.
Innovation Solution
A method is introduced where user equipment (UE) determines the number of serving cells to monitor based on a multiplication factor, configuring the number of physical downlink control channel (PDCCH) candidates and control channel elements (CCEs) to be monitored, optimizing the blind decoding process by distinguishing between single TRP and multiple TRP cells, and accounting for dual connectivity scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors all PDCCH candidates across multiple serving cells without limitation, then the reliability of control channel reception is improved, but the computational burden and resource usage increase significantly
Solution Approach 1:
The patent segments the blind decoding process by introducing separate limits for different cell types (intra-TDP cells vs. inter-TDP cells). The UE determines a first limit for intra-TDP cells and a second limit for inter-TDP cells, allowing differentiated monitoring strategies that reduce overall complexity while maintaining reliability.
Solution Approach 2:
The patent changes the parameter of monitoring capability by introducing a multiplication factor that scales the second limit based on the number of serving cells configured with multiple TDPs. This parameter adjustment allows the system to adapt the monitoring burden dynamically, balancing reliability requirements against device complexity.
2Adaptability or versatility
If the UE increases the number of monitored serving cells to support multiple TRPs, then the versatility of the communication system is improved, but the resource utilization and energy consumption increase
Solution Approach 1:
The patent segments the energy consumption by categorizing cells into different types with different monitoring requirements. Intra-TDP cells use one limit while inter-TDP cells use another limit scaled by a multiplication factor, allowing the UE to allocate processing energy efficiently based on the specific multi-TRP configuration.
Solution Approach 2:
The patent applies partial monitoring action by allowing the UE to monitor a limited number of PDCCH candidates per cell type rather than all possible candidates. The multiplication factor enables selective scaling of monitoring effort for inter-TDP cells, performing just enough decoding to support multi-TRP versatility without excessive energy consumption.
3Adaptability or versatility
If the system configures multiple CORESET groups for serving cells, then the adaptability to multi-TRP scenarios is improved, but the device complexity and configuration management become more difficult
Solution Approach 1:
The patent segments CORESET management by associating different CORESET groups with different TDP types. The UE determines limits separately for intra-TDP and inter-TDP cells based on their respective CORESET configurations, simplifying the management of multiple CORESET groups by treating them as distinct categories with different monitoring rules.
Data Source
AI summary
Since multiple transmit-receive point (TRP) communications may increase the number of physical downlink control channel (PDCCH) candidates without increasing the number of cells, new limits for multi-TRP communications may be defined. A UE may determine a PDCCH monitoring capability across all downlink serving cells that may account for multiple-TRP cells and for carrier aggregation and dual connectivity using a a monitoring capability for a first control resource set (CORESET) group and a second CORESET group. Further, the UE may determine limits of a number of serving cells based on the capability and a configuration of serving cells. The UE may determine a total limit and a per cell limit of PDCCH candidates and non-overlapped control channel elements (CCEs) to monitor in a slot for a cell group for the first CORESET group and for the second CORESET group. The UE may perform blind decoding operations within the limits.