Interference-immune transmission of data telegrams in a communications network

Abstract

The invention relates to a communications network (20, 30) comprising a plurality of network components (21a-l, 31a-l) that are interconnected for exchanging data telegrams, the communications network (20, 30) having a first partial network (22a, 32a) and a second partial network (22b, 32b) and each network component (21a-l, 31a-l) being connected to the two partial networks (22a-b, 32a-b). In order to design such a communications network (20, 30) with few devices and so as to be as reliable as possible, the communications network (20, 30) should comprise at least some network components (21a-l, 31a-l) that are interconnected in a chain-like manner, each chain (24a-d, 34a-d) of network components (21a-l, 31a-l) having a first network component (e.g. 21a, 31a), which is directly connected to the first partial network (22a, 32a), and a second network component (e.g. 21c, 31c), which is directly connected to the second partial network (22b, 32b). The invention also relates to a corresponding network component (21a-1, 31a-1) for operation in a communications network (20, 30), and a method for the interference-immune transmission of data telegrams in a communications network (20, 30).

Description

technical field [0001] 本发明涉及一种通信网络,其具有为了交换数据报文而相互连接的多个网络部件,其中,所述通信网络具有第一子网和第二子网,并且每个网络部件与两个子网 connect. 本发明还涉及一种用于在这种通信网络中运行的网络部件以及一种用于在这种通信网络中的数据报文的抗干扰传输的方法。 Background technique [0002] 目前,网络部件、即能够连接到通信网络并且经由通信网络通过传输相应的数据报文来交换数据的能联网的设备在许多技术领域中、例如在装置的自动化中得到了应用。下面,不仅将能联网的终端设备,而且将用于在通信网络中控制和管理数据报文的传输的这种设备,即例如所谓的“交换机”、“桥接器”、“集线器”、“路由器”,视为网络部件。 [0003] 许多自动化地运行的装置要求很高程度的故障安全保护。这种要求对用来将这种装置的网络部件彼此连接的通信网络有很严重的影响。因此,通常将这些通信网络设计为冗余的,也就是说,即使在通信网络内的一个网络连接发生故障的情况下,也保证各个网络部件之间的数据报文的可靠传输。下面,术语“通信连接”包括各个网络部件之间的整个传输路径,也就是说,不仅包括存在的(有线或无线的)传输介质,还包括其到各个网络部件的物理的、通信技术的和逻辑的连接(例如接口、通信装置、协议栈)。 [0004] 这种设计为故障安全的通信网络的使用的一个示例是自动化装置,其中,能联网的自动化设备经由通信网络彼此连接,以交换数据报文。自动化装置用于系统、例如供电网或电气开关装置的自动化,并且通常包括布置在相应的装置、即例如供电网的主要部件附近的自动化设备(例如所谓的现场设备)。在供电网的情况下,这些主要部件例如可以是电缆和导线、变压器、发电机、电动机或变换器。自动化设备例如可以是安装在供电网的分站的所谓的电气保护设备或者现场控制设备 按照专业术语来说,也经常将这种自动化设备称为所谓的“IED”(“Intelligent Electronic Device:智能电子设备”)。在此,自动化设备与通信网络连接,并且经由其交换作为有用数据包括例如控制命令、关于事件(例如阈值违反)的消息、测量值或状态消息的数据报文。 [0005] 在作为所谓的“平行冗余协议”(PRP:Parallel Redunda...

AI Technical Summary

Problems solved by technology

[0009] Compared to the PRP standard, a communication network constructed according to the HSR standard is handled with a smaller number of cables and switches, however, it requires a relatively high administrative overhead for the control of the communication from the connected network components, especially since it has to be Carry out the identification and elimination of data packets circulating in the ring communication network (Loop Prevention)

Therefore, the available network components are relatively expensive

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