DVP: A Novel High-Availability Seamless Redundancy (HSR) Protocol Traffic-Reduction Algorithm for a Substation Automation System Network

Nsaif, Saad Allawi; Rhee, Jong-Myung

doi:10.3390/en7031792

Cited by 21 publications

(13 citation statements)

References 8 publications

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“…Like ODP, DVP [11,18,19] also establishes two predefined paths for each connection pair of terminal nodes in a network. However, unlike ODP that discovers the dual paths based on the network's link information, the DVP approach discovers the dual paths by sending and receiving control messages such as path selection and path confirmation messages.…”

Section: Dvp Conceptsmentioning

confidence: 99%

A Comparison of Techniques for Reducing Unicast Traffic in HSR Networks

2015

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This paper investigates several existing techniques for reducing high-availability seamless redundancy (HSR) unicast traffic in HSR networks for substation automation systems (SAS). HSR is a redundancy protocol for Ethernet networks that provides duplicate frames for separate physical paths with zero recovery time. This feature of HSR makes it very suited for real-time and mission-critical applications such as SAS systems. HSR is one of the redundancy protocols selected for SAS systems. However, the standard HSR protocol generates too much unnecessary redundant unicast traffic in connected-ring networks. This drawback degrades network performance and may cause congestion and delay. Several techniques have been proposed to reduce the redundant unicast traffic, resulting in the improvement of network performance in HSR networks. These HSR traffic reduction techniques are broadly classified into two categories based on their traffic reduction manner, including traffic filtering-based techniques and predefined path-based techniques. In this paper, we provide an overview and comparison of these HSR traffic reduction techniques found in the literature. The concepts, operational principles, network performance, advantages, and disadvantages of these techniques are investigated, summarized. We also provide a comparison of the traffic performance of these HSR traffic reduction techniques.

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Section: Dvp Conceptsmentioning

confidence: 99%

A Comparison of Techniques for Reducing Unicast Traffic in HSR Networks

2015

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“…These techniques discover and establish dual paths between a source and a destination in an HSR network before forwarding unicast traffic frames from the source to the destination through the dual paths. Dual paths-based techniques include the dual virtual paths (DVP) [14] technique, which was then extended as extended dual virtual paths (EDVP) [15], the ring-based dual paths (RDP) [16] technique, and the dual separate paths (DSP) [17] technique. These dual paths-based techniques significantly reduce redundant unicast traffic in HSR networks.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Effective Filtering Approach (eEFA) for Improving HSR Network Performance in Smart Grids

2018

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Abstract:The effective filtering approach (EFA) is one of the most effective approaches for improving the network traffic performance of high-availability seamless redundancy (HSR) networks. However, because EFA uses port locking (PL) for detecting nondestination doubly-attached nodes with HSR protocol (DANH) rings in HSR networks, it forwards the first sent frame to all DANH rings in the network. In addition, it uses a control message for discovering passive QuadBox rings in both unidirectional and bidirectional communications. In this study, we propose an enhanced version of EFA called enhanced-EFA (eEFA) that does not forward unicast frames to nondestination DANH rings. eEFA does not use any control message to discover passive QuadBox rings in bidirectional communications. eEFA thus reduces the network traffic in HSR networks compared with EFA. Analytical and simulation results for a sample network show that the traffic reduction of eEFA was 4-26% and 2-20% for unidirectional and bidirectional communications, respectively, compared to EFA. eEFA, thus, clearly saves network bandwidth and improves the network performance.

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“…This removes these traffic type at an early stage instead of circulating it in the network. Recently, they presented the DVP algorithm to solve unnecessary HSR traffic problems [14]. The main concept of the DVP algorithm is to establish two virtual paths between a source DANH and a destination DANH.…”

Section: Copyright C 2016 the Institute Of Electronics Information Amentioning

confidence: 99%

Extended Dual Virtual Paths Algorithm Considering the Timing Requirements of IEC61850 Substation Message Types

Hong

Lim

Joe

2016

IEICE Trans. Inf. & Syst.

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SUMMARYThe high-availability seamless redundancy (HSR) protocol is a representative protocol that fulfills the reliability requirements of the IEC61850-based substation automation system (SAS). However, it has the drawback of creating unnecessary traffic in a network. To solve this problem, a dual virtual path (DVP) algorithm based on HSR was recently presented. Although this algorithm dramatically reduces network traffic, it does not consider the substation timing requirements of messages in an SAS. To reduce unnecessary network traffic in an HSR ring network, we introduced a novel packet transmission (NPT) algorithm in a previous work that considers IEC61850 message types. To further reduce unnecessary network traffic, we propose an extended dual virtual paths (EDVP) algorithm in this paper that considers the timing requirements of IEC61850 message types. We also include sending delay (SD), delay queue (DQ), and traffic flow latency (TFL) features in our proposal. The source node sends data frames without SDs on the primary paths, and it transmits the duplicate data frames with SDs on the secondary paths. Since the EDVP algorithm discards all of the delayed data frames in DQs when there is no link or node failure, unnecessary network traffic can be reduced. We demonstrate the principle of the EDVP algorithm and its performance in terms of network traffic compared to the standard HSR, NPT, and DVP algorithm using the OPNET network simulator. Throughout the simulation results, the EDVP algorithm shows better traffic performance than the other algorithms, while guaranteeing the timing requirements of IEC61850 message types. Most importantly, when the source node transmits heavy data traffic, the EDVP algorithm shows greater than 80% and 40% network traffic reduction compared to the HSR and DVP approaches, respectively. key words: IEC61850, high-availability seamless redundancy, timing requirements, dual virtual paths, extended dual virtual paths, sending delay, delay queue, traffic flow latency, traffic reduction

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DVP: A Novel High-Availability Seamless Redundancy (HSR) Protocol Traffic-Reduction Algorithm for a Substation Automation System Network

Cited by 21 publications

References 8 publications

A Comparison of Techniques for Reducing Unicast Traffic in HSR Networks

A Comparison of Techniques for Reducing Unicast Traffic in HSR Networks

Enhanced Effective Filtering Approach (eEFA) for Improving HSR Network Performance in Smart Grids

Extended Dual Virtual Paths Algorithm Considering the Timing Requirements of IEC61850 Substation Message Types

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