Two-Stage Protocol Decoding for Low-Latency Wireless Communication
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Solution Overview
Problem
In wireless communication systems like LTE and NR, high retransmission latency occurs due to insufficient erasure correction capability, which is not effectively reduced by existing methods that reuse symbols for error correction.
Innovation Solution
An information processing device and method that perform decoding in both protocol layers, providing likelihood information from the first protocol layer to the second, allowing for improved decoding in the second layer and reducing retransmission latency by utilizing two-stage FEC encoding and decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If single-layer decoding is used, then device complexity is reduced, but erasure correction capability is insufficient leading to high retransmission latency
Solution Approach 1:
The decoding function is segmented into two protocol layers: the first protocol layer performs initial decoding and generates likelihood information, while the second protocol layer performs subsequent decoding using this likelihood information. This segmentation allows each layer to specialize in specific decoding tasks, improving overall erasure correction capability without requiring a single complex decoding structure.
Solution Approach 2:
The solution adds a dimensional aspect to decoding by introducing a multi-layer protocol structure. Instead of a single decoding pass, the system performs decoding across multiple protocol layers, where the first layer processes data and passes likelihood information to the second layer, effectively adding a temporal and structural dimension to the decoding process.
2Reliability
If retransmission is performed to ensure data accuracy, then reliability is improved, but latency increases
Solution Approach 1:
The first protocol layer performs preliminary decoding and generates likelihood information that is passed to the second protocol layer. This preliminary action enables the second layer to perform more accurate decoding with better input data, reducing the need for retransmissions and thereby reducing latency while maintaining reliability.
3Measurement precision
If likelihood information is shared between protocol layers, then decoding accuracy is improved, but inter-layer complexity increases
Solution Approach 1:
Likelihood information acts as an intermediary between the first and second protocol layers. The first layer generates this likelihood information as output, which then serves as input for the second layer's decoding process. This intermediary mechanism enables accurate information transfer between layers without requiring complex direct integration, simplifying the inter-layer interface while maintaining decoding accuracy.
Data Source
AI summary
Provided are an information processing device and a decoding method that implement low-latency communication. An information processing device of the present disclosure includes: a first processing unit that performs decoding in a first protocol layer and provides likelihood information obtained by the decoding to a second protocol layer; and a second processing unit that performs decoding in the second protocol layer on the basis of the likelihood information.