PUSCH Transmission RV Sequence Optimization for Multi-TRP Reliability
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Solution Overview
Problem
Current wireless communication systems face challenges in reliability and robustness for Physical Uplink Shared Channel (PUSCH) transmissions, particularly with the introduction of multi-Transmission and Reception Point (TRP) technology, where existing redundancy version sequences cause performance issues and waste transmission occasions due to inflexible RV sequence mapping and lack of diversity.
Innovation Solution
A method where a terminal device receives a radio resource control configuration with a redundancy version (RV) offset and identity from a network device, determining if the RV sequence meets specific conditions, and if not, transmits uplink data without applying the RV sequence, thereby optimizing PUSCH transmissions across multiple TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RV sequence is applied to PUSCH transmission occasions associated with the second SRI, then the transmission follows the configured redundancy version pattern, but this causes performance issues and wastes transmission occasions due to inflexible RV sequence mapping
Solution Approach 1:
The patent introduces dynamic adjustment of RV sequence application based on transmission occasion characteristics. The terminal device determines whether to apply the RV sequence dynamically for the second SRI associated PUSCH transmission occasions, rather than applying it uniformly. This dynamic approach allows the system to adapt to different transmission conditions, improving both reliability and efficiency by avoiding unnecessary RV sequence applications that waste transmission occasions.
Solution Approach 2:
The patent changes the parameter of RV sequence application from a fixed configuration to a conditional parameter. By introducing conditions under which the RV sequence should or should not be applied (specifically for the second SRI associated occasions), the system optimizes the balance between reliability and transmission efficiency. This parameter change allows flexible control over redundancy version usage based on specific transmission requirements.
2Stability of the object's composition
If the RV sequence is applied uniformly to all PUSCH transmission occasions, then the redundancy version pattern is maintained, but this lacks flexibility and causes waste in transmission occasions
Solution Approach 1:
The patent segments the PUSCH transmission occasions into different groups based on their association with different SRI configurations. The first SRI associated occasions maintain the configured RV sequence pattern, while the second SRI associated occasions are handled differently (with optional RV sequence application). This segmentation allows the system to maintain consistency where needed while introducing flexibility where beneficial, resolving the contradiction between stability and adaptability.
Solution Approach 2:
The patent applies different RV sequence handling strategies to different transmission occasions based on their local characteristics. Specifically, the second SRI associated PUSCH transmission occasions are identified and treated differently from the first SRI associated occasions. This local quality approach allows the system to optimize each transmission occasion individually, maintaining RV sequence consistency for some occasions while allowing flexibility for others, thereby resolving the contradiction between stability and adaptability.
3Reliability
If the RV sequence is applied to ensure redundancy for repetition transmissions, then reliability is improved, but transmission occasions are wasted when the sequence does not meet repetition conditions
Solution Approach 1:
The patent performs preliminary determination of whether the RV sequence meets the conditions for repetition transmissions before actually applying the sequence. The terminal device checks whether the RV sequence is appropriate for the second SRI associated PUSCH transmission occasions in advance. This preliminary action prevents wasted transmission occasions by avoiding unnecessary RV sequence applications, thereby reducing time loss while maintaining reliability when needed.
Solution Approach 2:
The patent introduces a feedback mechanism where the terminal device determines whether the RV sequence meets the repetition transmission conditions based on the configured parameters and transmission characteristics. This feedback loop allows the system to adjust RV sequence application dynamically, ensuring that redundancy is provided only when necessary for repetition transmissions, thus avoiding time waste while maintaining reliability.
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer readable media for communication. According to embodiments of the present disclosure, a terminal device receives, from a network device, a radio resource control (RRC) configuration comprising a repetition number for physical uplink shared channel (PUSCH) transmission occasions associated with a first sounding reference signal (SRS) resource indicator (SRI) and PUSCH transmission occasions associated with a second SRI, the RRC configuration further comprising a redundancy version (RV) offset to a RV sequence associated with the first SRI. The terminal device receives DCI indicating an identity of a RV. If a first RV sequence determined based on the repetition number, the identity and the RV offset meets a condition, the terminal device does not apply the first RV sequence. In this way, it improves reliability.