Compression Schemes for Pre-Decoded Samples in Wireless Relay Nodes

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Solution Overview

Problem

Current wireless communication systems face challenges in efficiently compressing and relaying pre-decoded samples, which affects the speed and efficiency of packet transmission in integrated access and backhaul systems.

Innovation Solution

The method involves a wireless relay node receiving a packet from a transmitter node, compressing pre-decoded samples using a compression scheme, and transmitting a second packet containing the compressed samples to a receiver node. The receiver node then decompresses and decodes these samples to recover the original packet.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If pre-decoded samples are relayed without compression, then the transmission is simpler and faster to process, but the packet size is larger and consumes more bandwidth

Engineering Contradiction:

Improverelaying speedVSAvoidpacket size

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent applies compression schemes that transform pre-decoded samples from their original format to a compressed representation, changing the parameter of data size while maintaining the essential information content. This allows the relayed packet to be smaller in size but still recoverable at the destination.

Inventive Principle:

Principle #35Parameter changes

2Quantity of substance

If compression is applied to pre-decoded samples, then the packet size is reduced and bandwidth efficiency improves, but the processing complexity increases

Engineering Contradiction:

Improvepacket sizeVSAvoidcompression processing complexity

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The patent performs compression on pre-decoded samples before relaying, which is a preliminary action that reduces the data size upfront. This avoids the need to compress larger decoded packets later, making the overall process more efficient despite the added compression step.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If traditional decoding and re-encoding is performed at the relay node, then the packet can be fully processed and error correction applied, but the relaying latency increases

Engineering Contradiction:

Improveerror correction capabilityVSAvoidrelaying latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent performs partial decoding to obtain pre-decoded samples before complete decoding, which is a preliminary action that maintains reliability information (such as log-likelihood ratios) while avoiding the time-consuming full decoding and re-encoding process. This significantly reduces relaying latency while preserving error correction capabilities.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent extracts essential information from the received packet in the form of pre-decoded samples, separating the critical reliability data from the full decoding process. This extraction allows the relay to forward processed data quickly while the destination performs the complete decoding operation.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12309244B2Compression schemes for relaying prior to decoding

Publication Date: 2025.05.20 QUALCOMM INC

AI summary

Certain aspects of the present disclosure provide compression schemes for relaying prior to decoding. A method that may be performed by a wireless relay node includes receiving, from a transmitter node, a first packet intended for a receiver node, compressing pre-decoded samples of the first packet according to a compression scheme, and transmitting, to the receiver node, a second packet including the compressed pre-decoded samples.