Wireless Source Identification via Active ID List and CRC Scrambling

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Solution Overview

Problem

Current wireless networks face high signaling resource overhead due to the need for explicit source identification in transmissions, especially in cases where data is small, and this issue persists even in blind or grant-free transmission networks.

Innovation Solution

A method where a network device receives an initial transmission with an explicit source ID, adds it to a list of active source IDs, and then identifies subsequent transmissions without explicit source IDs by embedding the ID within the data, using techniques like scrambling the CRC with the source ID, allowing the receiver to determine the source ID from a list.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If explicit source ID signaling is included in each transmission, then the receiver can identify the transmission source, but the signaling resource overhead becomes large compared to the data transmitted

Engineering Contradiction:

Improvesource identification accuracyVSAvoidsignaling resource overhead

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The receiver pre-generates a set of candidate source IDs locally before receiving transmissions. When a transmission is received without explicit source ID, the receiver correlates the transmission with the pre-generated candidate IDs to identify the source, eliminating the need to transmit the source ID explicitly in each message.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Instead of transmitting the actual source ID in each message, the system uses a copy or reference mechanism where the receiver reconstructs the source ID information locally through correlation with pre-generated candidates, avoiding redundant transmission of the same identification data.

Inventive Principle:

Principle #26Copying

2Measurement precision

If source ID is embedded in each transmission, then the transmission source can be identified, but the data transmission efficiency decreases due to increased message length

Engineering Contradiction:

Improvesource identification accuracyVSAvoiddata transmission efficiency

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The source ID information is extracted from the transmission content itself through correlation operations, rather than being carried as a separate explicit field. This removes the overhead of including source ID in each transmission while maintaining accurate source identification.

Inventive Principle:

Principle #2Taking out (Extraction)

3Quantity of substance

If blind detection is used without explicit source ID, then signaling overhead is reduced, but the receiver cannot determine the transmission source

Engineering Contradiction:

Improvesignaling resource overheadVSAvoidsource identification accuracy

Core Design Contradiction:

Quantity of substanceVSMeasurement precision

Solution Approach 1:

The system uses correlation feedback where the receiver tests candidate source IDs against the received transmission and identifies the correct source based on the strength of correlation match. This feedback mechanism enables accurate source identification without explicit signaling.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS10390333B2System and method for transmission source identification

Publication Date: 2019.08.20 HUAWEI TECH CO LTD

AI summary

A method embodiment includes receiving, by a first network device, a first transmission comprising an explicit first source identification (ID). The first source ID is added to a list of active source IDs. The first network device receives a second transmission. The second transmission does not include an explicit second source ID. The first network device determines the second source ID by using the list of active source IDs.