Multi-component Interleaver for 5G CORESET Collision Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing control resource sets (CORESETs) of different symbol lengths, leading to blocking issues and interference problems due to insufficient interleaving techniques, especially in 5G networks with increasing base station density and complex interference scenarios.
Innovation Solution
A multi-step interleaver design is implemented, including a diversity component and a randomization component, which involves permuting REG bundles within segments and then interleaving these across the entire CORESET, to align and randomize the interleaving of REG bundles across different CORESET lengths, reducing blocking and improving frequency diversity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional interleaving techniques are used for CORESETs, then implementation is simple, but blocking issues and interference problems occur between overlapping CORESETs of different symbol lengths
Solution Approach 1:
The patent divides the interleaving process into two distinct segments: a first interleaver that operates on resource element groups (REGs) within a control resource set, and a second interleaver that operates on control channel elements (CCEs) formed from the interleaved REGs. This segmentation allows each interleaver to be optimized for its specific function, reducing blocking between overlapping CORESETs while maintaining manageable complexity through modular design.
2Adaptability or versatility
If CORESETs of different symbol lengths are supported, then system flexibility and adaptability improve, but resource allocation complexity and interference management difficulty increase
Solution Approach 1:
The patent implements a universal interleaving framework where the same two-stage interleaving structure (first interleaver for REGs, second interleaver for CCEs) is applied across CORESETs of different symbol lengths. This multi-functional design allows the system to handle 1-symbol, 2-symbol, and 3-symbol CORESETs uniformly, providing adaptability without proportionally increasing complexity, as the core interleaving mechanism remains consistent across different configurations.
3Reliability
If REG bundles are interleaved across the entire CORESET, then frequency diversity improves, but processing time and computational load increase
Solution Approach 1:
The patent applies the first interleaver to REGs before CCEs are formed, performing preliminary interleaving on the finer REG granularity. This preliminary action distributes REGs across the CORESET early in the process, establishing frequency diversity before CCE aggregation. The second interleaver then operates on the already-interleaved CCEs, completing the diversity process efficiently without requiring complete re-processing of all elements.
Data Source
AI summary
Systems and methods herein increase the throughput and decreases the collisions of transmitted resource element group (REG) bundles. Prior to transmitting a PDCCH comprising REG bundles, one or more processors perform a multi-component interleaver process that diversifies and randomizes the sequence of the REG bundles while also supporting CORESETs having different symbol lengths. In embodiments, the multi-component interleaver diversifies a virtual sequence of REG bundles using a block interleaver and then uses a randomizer interleaver to randomize the output sequence of the block interleaver. The diversified and randomized output sequence of REG bundles may be the physical channel sequenced of the REG bundles. The physical channel sequence of REG bundles is diversified and randomized such that the physical sequence increases throughput and decreases the collisions of transmitted REG bundles. Other aspects are claimed and described.