# Improved Anti-Collision Algorithm for the Application on Intelligent Warehouse
## 1 Introduction  
With the rapid development of logistics industry and supply chain management, warehouse management has been paid more and more attention in logistics management center. Warehouse management has become the core of logistics management. At the same time, with the rise of e-commerce, the types and the turnover of goods have increased dramatically, resulting in the operational efficiency of warehouses playing a decisive role in the overall efficiency of the entire logistics system. With the in-depth application of IoT, many emerging technologies are changing the global industry pattern on an unprecedented scale, and, at the same time, they provide an opportunity for warehousing development to break through bottlenecks. The introduction and evolution of the concept of intelligent warehousing makes the development of warehousing technology have a broader research space. Therefore, the introduction of Internet of Things (IoT) technology into warehouse management is very meaningful.  
Radio Frequency Identification (RFID) technology is a non-contact automatic identification technology which can automatically identify target objects and obtain relevant data through radio frequency signals. It has the advantages of high reliability, large storage capacity and easy modification. As the underlying key perception technology of IoT, it can quickly read and track electronic tags attached to items, and is widely used in positioning, monitoring, supply chain management and other applications. The maximum number of tags that can be detected simultaneously by a reader is different according to different RFID standards. For example, an OBID reader conforming to ISO 1693 standard can detect a maximum of 16 tags and some UHF RFID readers can detect 100 tags at the same time.  
In the intelligent warehouse, the fixed RFID reader is used to identify the batch of materials and record relevant information. The inventory checking depends on the handheld RFID reader to check the inventory quantity. The warehousing logistics system uses the perception layer of IoT to identify materials, so as to obtain real-time warehousing production data. The information of intelligent warehousing is transmitted through the network layer to the application layer for processing. In addition, the application layer realizes the application interaction between warehousing materials and users, and between materials and materials.  
RFID system is composed of readers and tags, when more than one tag replies to the reader at the same time, the collision occurs. The collision problem will seriously affect the integrity of tag data and make tags unable to be recognized correctly. The tag collision problem is one of the important problems in the RFID system, which greatly restricts the development of RFID technology. At present, the anti-collision algorithm has become one of the core topics in the theory and application of RFID. In this paper, an improved anti-collision algorithm (GMQT) is proposed and applied in intelligent warehouse to improve the identification rate of items and the turnover efficiency of warehouse.