基于UANET的链接状态意识的多点中继的综合评估算法
Rencheng Jin1, Xinyuan Zhang1, Jiajun Liu1
1Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian 116024, China.
Sensors (Basel, Switzerland)
|March 13, 2024
概括
在优化链路状态路由 (OLSR) 中选择多点继电器 (MPR) 节点对于动态网络至关重要. 新的CEL-OLSR协议通过使用链路状态意识来提高网络性能MPR选择.
科学领域:
- 计算机科学 计算机科学
- 网络工程 网络工程
- 无线通信无线通信
背景情况:
- 多点继电器 (MPR) 对于优化链路状态路由 (OLSR) 协议至关重要,改善网络开销,吞吐量,可扩展性和适应性.
- 目前的MPR选择标准有限,阻碍了基于实时链路状态的动态网络中的灵活节点选择.
- 动态网络中的节点移动性会导致不稳定的链接,传输精度差,以及缺乏实时性能.
研究的目的:
- 为动态网络提出基于链路状态意识的全面MPR评估算法.
- 为应对移动性带来的挑战,包括不稳定的链路和低传输精度.
- 增强MPR节点的选择,以提高网络性能.
主要方法:
- 定义了五个状态评估参数,考虑节点的移动性和负载.
- 使用重量方法来确定重量系数.
- 采用了以类似于理想解决方案的顺序偏好技术 (TOPSIS) 来进行全面的MPR节点评估和选择.
- 提出了基于链接状态对OLSR (CEL-OLSR) 协议的认识的综合评估.
- 使用NS-3进行模拟实验.
主要成果:
- 拟议的CEL-OLSR协议与现有协议 (PM-OLSR,ML-OLSR,LD-OLSR,OLSR) 相比,显著提高了网络性能.
- 关键的性能改进包括增强的数据包交付速度和网络吞吐量.
- 此外,CEL-OLSR还可以减少平均端到端延迟和控制开销.
结论:
- CEL-OLSR协议有效地解决了动态网络中的MPR选择挑战.
- 在MPR选择中,链路状态的认识会导致网络整体性能的大幅改善.
- 拟议的方法为移动无线网络中的MPR选择提供了更适应和更有效的方法.
相关概念视频
Overcurrent Relays
Overcurrent relays, crucial for circuit protection, are connected to the secondary current of a current transformer. There are two primary types of overcurrent relays: instantaneous and time-delay.
Instantaneous overcurrent relays activate immediately when the input current exceeds a predetermined value, known as the pickup current, instantly energizing the circuit breaker trip coil. This rapid response is vital for addressing severe faults quickly.
Time-delay overcurrent relays, on the other...
Instantaneous overcurrent relays activate immediately when the input current exceeds a predetermined value, known as the pickup current, instantly energizing the circuit breaker trip coil. This rapid response is vital for addressing severe faults quickly.
Time-delay overcurrent relays, on the other...
Reclosers and Fuses
Automatic circuit reclosers enhance the protection of distribution circuits by interrupting and auto-reclosing an AC circuit according to a preset sequence. They effectively manage temporary faults on overhead distribution lines, often caused by tree limbs or wildlife, by briefly disrupting service to improve overall reliability. However, contact with reclosers or energized broken conductors on the ground can pose serious hazards.
A comprehensive protection scheme for radial distribution...
A comprehensive protection scheme for radial distribution...
Directional Relays
Directional relays, essential for managing unidirectional fault currents, enhance the safety and efficiency of power systems. On power lines equipped with directional relays, faults downstream (to the right) of the current transformer typically cause the fault current to lag the bus voltage by approximately 90 degrees, known as the forward direction. In contrast, upstream (left-side) faults may result in the fault current leading the bus voltage by nearly 90 degrees, termed the reverse...
Line Protection with Impedance Relays
Coordinating time-delay overcurrent relays in complex radial systems and directional overcurrent relays in multi-source transmission loops can be challenging. Impedance relays address these issues by responding to the voltage-to-current ratio, specifically measuring the apparent impedance of a line. These relays become more sensitive during faults as current increases and voltage decreases, thereby reducing the apparent impedance.
Under normal conditions, low load currents keep the measured...
Under normal conditions, low load currents keep the measured...
Differential Relays
Differential relays are used to protect generators, buses, and transformers by comparing electrical quantities at different points. When a fault occurs, the difference in current between the two points triggers the relay to operate, opening the circuit breaker. Under normal conditions, the current entering (i1) and leaving (i2) a generator are equal. When a fault occurs, however, these currents become unequal, and the difference current flows in the relay operating coil, causing the relay to...
Pilot and Numeric Relaying
Pilot relaying is a type of differential protection used in power systems. It compares electrical quantities at the terminals of equipment via a communication channel instead of direct relay interconnection. This method is essential for transmission lines where the terminals are far apart, typically up to 80 km for lines with 69 to 115 kV ratings. Four types of communication channels are used for pilot relaying:


