Sidelink SCI Deinterleaving Buffers for Faster V2X Decoding
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Solution Overview
Problem
Existing wireless communication devices face challenges in quickly decoding sidelink control information (SCI) in sidelink-based vehicle-to-everything (V2X) communication systems, which hinders the speed of decoding physical sidelink shared channels (PSSCH) and subsequently affects communication speed.
Innovation Solution
The proposed solution involves a wireless communication device equipped with a plurality of deinterleaving buffers and processing circuitry that decodes first and second SCI, obtaining log likelihood ratio (LLR) values by demodulating the second SCI, deinterleaving these values, and decoding them to obtain a second decoding result, which is then used to decode the PSSCH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single deinterleaving buffer is used for decoding SCI, then the device complexity is low, but the decoding speed of SCI and subsequent PSSCH is reduced
Solution Approach 1:
The single deinterleaving buffer is segmented into multiple deinterleaving buffers (first deinterleaving buffer and second deinterleving buffer). This segmentation allows parallel processing of different LLR values, enabling faster decoding of SCI while distributing the computational load across multiple buffers, thus resolving the contradiction between decoding speed and device complexity.
2Productivity
If LLR values are processed sequentially in a single buffer, then the memory structure is simple, but the communication speed is hindered
Solution Approach 1:
The buffer structure is segmented into multiple deinterleving buffers that can process different LLR values simultaneously. This segmentation transforms the sequential processing bottleneck into parallel processing capability, significantly improving communication speed while maintaining a relatively simple overall buffer architecture.
Solution Approach 2:
The deinterleving operation is performed in advance using multiple buffers before the actual decoding process. This preliminary deinterleving of LLR values across multiple buffers prepares the data in an optimal format for subsequent decoding, enabling faster overall processing and improving communication speed without adding complexity to the core decoding function.
Data Source
AI summary
An operation method of a wireless communication device for performing sidelink-based vehicle-to-everything (V2X) communication includes decoding first sidelink control information (SCI) to obtain a first decoding result, the first SCI being contained in a received physical sidelink control channel (PSCCH), decoding second SCI including obtaining a plurality of log likelihood ratio (LLR) values by demodulating the second SCI, storing the plurality of LLR values in a plurality of deinterleaving buffers such that the plurality of LLR values are deinterleaved, and decoding the plurality of LLR values stored in the plurality of deinterleaving buffers to obtain a second decoding result, the second SCI being contained in a physical sidelink shared channel (PSSCH), and the PSSCH being received based on the first decoding result, and decoding the PSSCH based on the second decoding result.