A Dynamic Addressing Hybrid Routing Mechanism Based on Static Configuration in Urban Rail Transit Ad Hoc Network  
[PERSON]  
1 School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China 1  
[PERSON]  
1 School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China 111 School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100  
video playback) through built train-ground wireless communication networks [3]. The traditional urban rail transit vehicle-ground communication network is based on a fixed infrastructure, which transmits information through central nodes. Central nodes are interconnected through cables or optical fibers, and each terminal directly communicates with the central node. Typical applications are wireless local area networks, wireless cellular networks, etc. This traditional network structure relies on base stations or wireless access points for communication. When the fixed infrastructure is interfered with or damaged, it will affect the communication of the network and will be unable to meet the needs of future development. In recent years, wireless Ad Hoc network technology has developed rapidly as a new type of network communication technology. Ref. [4] discusses the most important results from 2000 to 2022 from various authors. It is widely used in satellite communications, vehicle networking, and other fields. Using a self-organized network architecture with decentralized and distributed control advantages in urban rail transit can overcome the problems existing in traditional urban rail communication systems. Therefore, the rail self-organization scheme for urban rail transit with high real-time and high bandwidth wireless communication has been proposed in recent years. Rail Ad Hoc networks are a new generation of digital infrastructure in the field of rail transit. They provide safe, efficient, and convenient standardized services through environmental awareness, data fusion computing, and decision control, including communication, positioning, timing, clearance detection, trackside equipment control, and other functions. Trackside equipment with wireless communication capabilities is installed along the rail line, and communication equipment is installed on the train. In the communication technology of urban rail Ad Hoc networks, the network layer is an important layer that can achieve the conversion of network addresses to physical addresses and find suitable paths for communication. In urban rail scenarios, communication between vehicles generally exceeds the single-hop range, and suitable routing protocols need to be used to perform multi-hop forwarding through trackside equipment to complete data transmission functions. To fully utilize the performance of urban rail Ad Hoc networks, efficient routing protocols are essential. However, there is little research work directly aimed at urban rail Ad Hoc network routing technology at home and abroad. Therefore, actively researching key routing technologies for urban rail transit Ad Hoc networks based on low-latency and high-reliability communication have important scientific significance and application value. In summary, urban rail Ad Hoc network routing technology has important significance in reducing communication delays, improving transmission reliability, and reducing construction costs. Researchers at home and abroad have conducted many in-depth studies on wireless Ad Hoc network routing protocols, obtaining many meaningful research results, which have reference significance for studying urban rail Ad Hoc network routing technology. However, it still needs to be pointed out that the current research is mostly based on wireless Ad Hoc networks and less so combined with the actual application scenarios of urban rail transit.