PUCCH Resource Mapping for Multi-TRP DCI Conflict Avoidance
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Solution Overview
Problem
In non-ideal backhaul scenarios of multi-TRP coordination in NR communications, PUCCH resources conflicts occur when multiple TRPs simultaneously send DCI to a terminal device, leading to resource conflicts in uplink control information transmission.
Innovation Solution
The method involves configuring PUCCH resources based on parameters such as downlink channel resources, demodulation reference signal ports, and transport blocks, ensuring that PUCCH configurations are associated with these parameters to avoid resource conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple TRPs simultaneously send DCI to a terminal device in non-ideal backhaul scenarios, then downlink data transmission capacity is improved, but PUCCH resource conflicts occur leading to uplink control information transmission reliability degradation
Solution Approach 1:
The patent segments the PUCCH resource selection process by associating different PUCCH resources with different transport block parameters (such as transport block index, redundancy version, or modulation and coding scheme). When multiple DCI are received from different TRPs, the terminal device selects PUCCH resources based on the specific parameters of each transport block, thereby dividing the resource selection into distinct segments that avoid conflicts while maintaining multi-TRP transmission capability
Solution Approach 2:
The patent applies local quality by making PUCCH resource allocation dependent on specific transport block parameters. Each transport block is associated with specific PUCCH resources based on its unique parameter combination, ensuring that locally differentiated resource allocation prevents conflicts at the uplink control channel level while allowing global multi-TRP operation
2Reliability
If PUCCH resources are independently configured for each TRP, then resource conflict avoidance is improved, but configuration complexity increases
Solution Approach 1:
The patent implements universality by using a unified PUCCH resource configuration mechanism that serves multiple TRPs simultaneously. Instead of maintaining separate independent configurations for each TRP, the system uses a single configuration framework where PUCCH resources are selected based on transport block parameters, allowing the same configuration structure to handle multiple TRPs without increasing overall complexity
Solution Approach 2:
The patent applies parameter changes by using transport block parameters (such as transport block index, redundancy version, or MCS) as the basis for PUCCH resource selection. By changing the selection criterion from TRP-specific to parameter-specific, the system achieves conflict avoidance through dynamic parameter-based differentiation rather than static multi-configuration, thereby reducing configuration complexity
Data Source
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AI summary
This application discloses a communications method and apparatus. The method includes: receiving, by a terminal device, PUCCH resource configuration indication information from a network device, where the PUCCH resource configuration indication information is associated with one or more of the following parameters: a downlink channel resource parameter, a demodulation reference signal port-related parameter, and a transport block parameter. A corresponding apparatus is further disclosed. According to the solution in this application, the PUCCH resource configuration indication information is associated with one or more parameters of the downlink channel resource, the demodulation reference signal port-related parameter, and the transport block parameter. When the terminal device sends uplink control information by using a PUCCH resource, a PUCCH resource conflict can be avoided, thereby ensuring transmission reliability.