Multi-PxSCH DCI NDI and RV Segmentation for Invalid Transmission Handling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently scheduling physical uplink/downlink shared channel (PxSCH) transmissions, leading to collisions and invalid transmissions, which result in resource wastage and increased power consumption due to unnecessary retransmissions.
Innovation Solution
A method for signaling a new data indicator (NDI) and redundancy version (RV) for each PxSCH transmission, regardless of its validity, using a multi-PxSCH DCI message that includes separate fields for NDI and RV corresponding to each scheduled PxSCH, allowing user equipment to identify and ignore invalid transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-PxSCH grants are used to schedule multiple transmissions, then scheduling efficiency is improved, but transmission collisions occur leading to invalid transmissions
Solution Approach 1:
The patent segments the NDI and RV fields into multiple individual fields, with each field corresponding to a specific PxSCH transmission. This allows the UE to independently identify and process valid transmissions while ignoring invalid ones, resolving the contradiction between scheduling efficiency and transmission validity.
2Measurement precision
If NDI and RV are signaled for each PxSCH transmission, then transmission accuracy is improved, but DCI message complexity increases
Solution Approach 1:
The patent divides the NDI and RV signaling into multiple segmented fields, where each field is specifically associated with a particular PxSCH transmission. This segmentation enables precise identification of transmission parameters while maintaining a structured and manageable DCI message format.
Solution Approach 2:
The patent establishes predetermined rules for determining the number of NDI/RV fields based on the number of scheduled PxSCH transmissions. This preliminary configuration allows the UE to efficiently parse and process the DCI message without requiring complex dynamic interpretation, thus improving accuracy without excessive complexity.
3Productivity
If all scheduled transmissions are processed, then resource utilization is maximized, but power consumption increases due to unnecessary retransmissions
Solution Approach 1:
The patent enables the UE to extract and identify valid transmissions from the scheduled set by examining the NDI and RV fields. Invalid transmissions are effectively taken out of the processing queue, preventing unnecessary retransmissions and reducing power consumption while maintaining efficient resource utilization for valid transmissions.
Solution Approach 2:
The NDI field provides feedback information that allows the UE to determine whether a transmission is valid or invalid. This feedback mechanism enables the UE to make informed decisions about which transmissions to process, avoiding wasted energy on invalid transmissions while maintaining high resource utilization for valid ones.
Data Source
AI summary
Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for signaling a new data indicator (NDI) and/or redundancy version (RV) for physical uplink/downlink shared channel (PxSCH) transmissions scheduled by a multi-PxSCH downlink control information (DCI) grant. In some cases, these techniques may be used even when a scheduled PxSCH transmission is invalid. In some cases, a number of bits in an NDI field of the DCI corresponds to a number of PxSCHs scheduled by the multi-PxSCH DCI grant. In some cases, a number of bits in an RV field of the DCI corresponds the number of PxSCHs scheduled by the multi-PxSCH DCI grant.