Time-Frequency Diagonal Interleaving for URLLC-eMBB Interference
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Solution Overview
Problem
In wireless communications networks, Ultra-Reliable Low Latency Communications (URLLC) transmissions often interfere with Enhanced Mobile Broadband (eMBB) transmissions, leading to poor decoding performance due to interference in specific time and frequency resources.
Innovation Solution
The implementation of a diagonal interleaving scheme in both time and frequency domains, using one-dimensional interleavers in each domain and interweaving them to form a two-dimensional interleaver, which maps codeword elements to resource elements with a desired distance to avoid consecutive punctured bits, thereby mitigating interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If URLLC transmission is performed in wireless communication networks, then low latency and high reliability for URLLC is achieved, but interference with eMBB transmission occurs leading to poor decoding performance
Solution Approach 1:
The patent segments the code blocks of eMBB transmission into multiple code block groups and applies different interleaving patterns to each group. This segmentation allows the eMBB data to be distributed across multiple resource elements in a way that avoids concentrated interference from URLLC transmissions, thereby maintaining eMBB decoding performance while preserving URLLC low latency requirements.
Solution Approach 2:
The patent introduces diagonal interleaving that operates in both time and frequency dimensions simultaneously, rather than just sequential interleaving in one dimension. This two-dimensional approach spreads eMBB coded bits across time-frequency resources diagonally, ensuring that interference from URLLC transmissions (which affect specific time-frequency resources) does not concentrate on consecutive coded bits, thus resolving the interference problem.
2Productivity
If sequential data is transmitted in contiguous time-frequency resources, then transmission efficiency is improved, but decoding performance deteriorates due to interference concentration
Solution Approach 1:
The patent transitions from one-dimensional sequential interleving to two-dimensional diagonal interleaving across time and frequency domains. This allows data to be arranged in diagonal patterns where consecutive coded bits are separated in both time and frequency, preventing interference concentration while maintaining transmission efficiency through systematic resource element mapping.
Solution Approach 2:
The patent applies different interleaving patterns (first pattern for first code block group, second pattern for second code block group) to different portions of the data. This local differentiation ensures that each code block group experiences different interference patterns, improving overall decoding performance while maintaining efficient resource utilization.
Data Source
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AI summary
Apparatuses, methods, and systems for interleaving sequential data in time and frequency domains are disclosed. One apparatus (400) includes a processor (405) that interleaves sequential data in time and frequency domains. The sequential data includes a first data occupying a first time-frequency resource and a second data occupying a second time-frequency resource, the second data sequentially follows the first data prior to interleaving, and the first data is separated from the second data by at least one time resource and at least one frequency resource after interleaving.