Receiving Device Inconsistent Data Detection Wireless Transmission
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Solution Overview
Problem
In wireless communication systems, puncturing of data transmissions can lead to corruption of the soft buffer, causing decoding failures and requiring additional HARQ retransmissions, especially when URLLC data is inserted into MBB transmissions, as the receiver fails to detect the resource blanking, resulting in incorrect data combination.
Innovation Solution
A receiving device detects inconsistencies in signal characteristics, such as modulation order and power variations, using a sliding window detector and dynamic thresholds to identify corrupted data, allowing for flushing of affected regions in the soft buffer, thereby preventing incorrect data combination and reducing retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If URLLC data is inserted into MBB transmission resources, then URLLC transmission delay is reduced, but MBB decoding accuracy deteriorates due to soft buffer corruption
Solution Approach 1:
The patent divides the transmission resources into distinct segments with different modulation schemes. MBB uses higher-order modulation (e.g., 64QAM) while URLLC uses robust modulation (e.g., QPSK). The receiver segments the received signal and processes each segment according to its modulation type, preventing corruption of the MBB soft buffer by URLLC data.
Solution Approach 2:
Different parts of the transmission are given different qualities through modulation schemes. MBB data in non-punctured resources maintains high spectral efficiency with advanced modulation, while URLLC data in punctured resources uses more robust but less efficient modulation. This local differentiation allows the receiver to identify and handle punctured regions appropriately.
2Reliability
If HARQ retransmissions are performed for punctured MBB data, then decoding reliability is improved, but system throughput deteriorates due to increased retransmission overhead
Solution Approach 1:
The system performs self-service by having the receiver autonomously detect punctured resources through modulation inconsistency detection and automatically flush the corresponding soft buffer portions. This eliminates the need for transmitter-initiated retransmissions for punctured data, as the receiver can correctly decode non-punctured data independently.
Solution Approach 2:
The receiver provides feedback to the transmitter about detected punctured resources through uplink control information. This feedback mechanism allows the transmitter to be aware of puncturing patterns and optimize future transmissions, improving overall system efficiency without requiring additional retransmissions.
3Measurement precision
If explicit signaling is used to indicate punctured resources, then receiver detection accuracy is improved, but control overhead deteriorates
Solution Approach 1:
The patent introduces an intermediary detection mechanism based on modulation consistency checking. Instead of direct signaling, the receiver uses the modulation scheme itself as an intermediary indicator - MBB uses higher-order modulation while URLLC uses robust modulation. This intermediary approach provides detection capability without requiring separate explicit signaling.
Solution Approach 2:
Different modulation schemes act as different 'colors' or signatures that identify the type of data being transmitted. The receiver detects punctured resources by identifying changes in modulation 'color' - when the expected MBB modulation pattern changes to URLLC modulation pattern, the receiver identifies this as puncturing without needing explicit signaling.
Data Source
AI summary
The present disclosure provides methods and apparatus for detecting when a data transmission has been preempted or punctured by detecting inconsistency in the modulation or other signal characteristic of a received signal. If an inconsistency is detected, measures can be taken to mitigate potential problems caused by the inconsistent data. In one example, the receiving device (30) may identify soft bits in a soft buffer that may have been corrupted and flush the corrupted parts from the soft buffer.