Transport Block Symbol Mapping Across Slots Under Channel Blocking
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Solution Overview
Problem
Data transmission in communication scenarios like NR and NTN is affected by sudden signal blocking, leading to decreased signal-to-noise ratio, error floors, fluctuating data rates, and increased retransmissions.
Innovation Solution
Data in a transport block is discretized across multiple time domain symbols in different slots, with reference signals also distributed across these blocks, and interleaving/de-interleaving processes are optimized to minimize the impact of channel blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data is transmitted in concentrated time domain symbols, then transmission efficiency is improved, but vulnerability to channel blocking increases
Solution Approach 1:
The patent segments the transport block data across multiple time domain symbols and slots rather than concentrating it in one location. Specifically, data from a single transport block is distributed to different time domain symbols (e.g., 0th symbol in first slot, 1st symbol in second slot, etc.), creating spatial and temporal segmentation that reduces vulnerability to blocking while maintaining transmission efficiency.
2Object-affected harmful factors
If data is discretized across multiple slots, then resistance to channel blocking is improved, but decoding complexity increases
Solution Approach 1:
The patent employs feedback mechanisms where the receiving device sends acknowledgment information (ACK/NACK) to the transmitting device based on decoding results. This feedback loop allows the system to adaptively handle discretized data across multiple slots, managing decoding complexity through iterative error correction and retransmission protocols that resolve ambiguities from distributed data segments.
Solution Approach 2:
The patent applies preliminary interleaving and mapping operations at the transmitting device before data transmission. By pre-organizing and distributing data across multiple slots and time domain symbols in a predetermined pattern, the receiving device can systematically collect and decode data without facing excessive complexity during reception, as the structure is already optimized for the expected blocking scenarios.
3Strength
If reference signals are centralized in one transport block, then signal strength is maintained, but encoding length variation increases
Solution Approach 1:
The patent segments reference signals across multiple transport blocks rather than concentrating them in one block. Each transport block contains a portion of the reference signal appropriate for its data payload size, which standardizes encoding lengths while maintaining sufficient signal strength through distributed placement. This segmentation allows flexible allocation of reference signals to match varying data amounts in different transport blocks.
Data Source
AI summary
A first communication apparatus receives first data, and obtains second data and third data from the first data. The first data includes a first transport block. The first transport block includes the second data and the third data. The second data is mapped to an rth time domain symbol in a first slot. The third data is mapped to an sth time domain symbol in a second slot. r and s are positive integers, and r is not equal to s. Because data in a same transport block is discretized to two different time domain symbols in at least two slots for transmission, when a slot is affected by channel blocking in a data transmission process, only a part of data of one transport block is mapped to the slot.