Transport Block Interleaving Across Slots Under Channel Blocking
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Solution Overview
Problem
Data transmission in communication scenarios like satellite mobile communication is affected by sudden signal blocking, leading to decreased signal-to-noise ratio, error floors, fluctuating data rates, and increased retransmissions.
Innovation Solution
Discretizing data in transport blocks across multiple time domain symbols in different slots and distributing reference signals to minimize the impact of channel blocking, using interleaving and de-interleaving techniques to improve decoding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If data in a transport block is mapped to a single time domain symbol in one slot, then the mapping process is simple, but the data transmission is highly susceptible to channel blocking causing error floors and retransmissions
Solution Approach 1:
The patent segments the data of a transport block across multiple time domain symbols in different slots rather than mapping to a single symbol. This segmentation distributes the data risk, so that channel blocking in one slot does not cause complete transmission failure, thereby resolving the contradiction between simple mapping and reliable transmission.
Solution Approach 2:
The patent extends the data mapping from a single time dimension (one slot) to multiple time dimensions (multiple slots). By distributing data across different time slots, the system adds temporal diversity to protect against channel blocking, improving reliability without significantly increasing complexity.
2Reliability
If data is discretized across multiple slots, then the impact of channel blocking is reduced, but the mapping and processing complexity increases
Solution Approach 1:
The patent divides transport block data into multiple segments that are mapped to different time domain symbols across multiple slots. This segmentation approach improves decoding success rate by ensuring that not all data segments are affected by channel blocking in a single slot, while maintaining manageable complexity through systematic segmentation rules.
Solution Approach 2:
The patent performs preliminary interleaving and discretization of data before transmission across multiple slots. This preliminary action organizes the data in advance to distribute it across multiple time resources, so that when channel blocking occurs, the impact is naturally mitigated by the pre-distributed structure.
3Device complexity
If reference signals are centralized in one transport block, then the processing is simplified, but the encoding gain is reduced and decoding performance deteriorates
Solution Approach 1:
The patent segments reference signals and distributes them across multiple transport blocks rather than concentrating them in one block. This segmentation allows for better encoding gain by distributing reference signal resources, improving channel estimation accuracy and decoding performance without significantly increasing processing complexity.
Solution Approach 2:
The patent applies local quality by distributing reference signals to different transport blocks based on local channel conditions and data requirements. Each transport block receives appropriate reference signal resources tailored to its specific needs, optimizing decoding performance for each block while maintaining overall system efficiency.
Data Source
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AI summary
A communication method and apparatus, a chip system, a storage medium, and a computer program product are provided, to improve an encoding gain in a data transmission process, thereby improving decoding performance. In this application, 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. Therefore, the transport block is minimally affected by channel blocking in a decoding process, and a decoding success rate of the transport block is high.