# Wire and Cable Quality Traceability System Based on Industrial Internet of Things and Blockchain
## 3 Identity Resolution System and Blockchain Technology Integration Method
### Data Interaction Synchronization for the Integration of Identity Resolution and Blockchain
For the blockchain module, the \"Hyperledger Fabric 2.5\" has a field for setting block parameters, setting the number of transactions that can be accommodated as 100, the block size as 16 MB, and the time interval between blocks as 2.5 s. Caliper, a blockchain performance testing tool, is used to track the performance of the blockchain in real-time, and TPS and latency are chosen as the system's performance testing indexes here. Design 8 performance test experiments, using Caliper custom script to initiate transactions to the system, each round of transactions concurrently 1000 times, a total of 8000 times, the number of transactions, and latency of the experiments to record and calculate the success rate of transactions. The transaction throughput results and average transaction latency are shown in Figure 8.2

When the test script is set to 100-300 TPS, the transaction throughput will increase with the increase in transaction volume. After that, it will remain stable at around 260 transactions/s, and then the transaction time of the system will increase because the number of transactions is too large, and the average delay of the transactions within this number is about 0.5 s. In the 8 experiments, some of the transactions cannot be completed due to network reasons, and the average success rate of the system is calculated to be about 99.95%. The chain code under blockchain network deployment did not crash in many experiments. The performance can meet the traceability system application. Figure 8.3 System transaction performance test curve. Figure 8.4 System query and resolution processing capacity gradient change curve. ## 6 Conclusions and Future Studies

In this paper, from the perspective of wire and cable product manufacturing enterprises, we analyzed the key quality information and the complexity of business logic in the cable traceability process. Fully integrating the IIoT identity resolution system and blockchain technology, a complete set of cable quality traceability system construction methods is proposed. First, the identity data storage scheme based on blockchain technology and the smart contract design scheme based on identity resolution are analyzed and elaborated. Secondly, the data interaction and synchronization problems of identity resolution and blockchain are solved, and the quality traceability system framework integrating identity resolution and blockchain technology is built. The core quality data model of the cable supply chain is constructed, the detailed process of cable quality traceability empowered by identity resolution is elaborated, and a quality traceability model with the fusion of identity resolution and blockchain technology as the basic support and the whole industrial chain of cables as the orientation is proposed. Finally, the applicability of the quality traceability method proposed in the paper is verified through the development of a wire and cable quality traceability system, which improves the quality management efficiency of the wire and cable manufacturing enterprises and reduces the cost of information acquisition and recall of goods among the supply chain. This method will have a better reference value for discrete enterprises. The establishment of wire and cable product quality supervision and consumer rights protection mechanisms will have a certain positive impact on market regulators and consumers. With the arrival of 5G technology, industrial data with more modes and more complex structures will be mass-accessed and have high-speed transmission. The access frequency of public services will also reach an unprecedented height. These new challenges will put higher requirements on the information processing capacity of wire and cable quality traceability systems.