idnits 2.17.1 draft-wang-detnet-backhaul-requirements-00.txt: Checking boilerplate required by RFC 5378 and the IETF Trust (see https://trustee.ietf.org/license-info): ---------------------------------------------------------------------------- No issues found here. Checking nits according to https://www.ietf.org/id-info/1id-guidelines.txt: ---------------------------------------------------------------------------- == No 'Intended status' indicated for this document; assuming Proposed Standard Checking nits according to https://www.ietf.org/id-info/checklist : ---------------------------------------------------------------------------- ** There is 1 instance of too long lines in the document, the longest one being 1 character in excess of 72. Miscellaneous warnings: ---------------------------------------------------------------------------- == The copyright year in the IETF Trust and authors Copyright Line does not match the current year == Line 83 has weird spacing: '...inistic indu...' -- The document date (November 13, 2016) is 2711 days in the past. Is this intentional? Checking references for intended status: Proposed Standard ---------------------------------------------------------------------------- (See RFCs 3967 and 4897 for information about using normative references to lower-maturity documents in RFCs) == Missing Reference: 'S' is mentioned on line 218, but not defined == Unused Reference: 'I-D.finn-detnet-problem-statement' is defined on line 220, but no explicit reference was found in the text == Unused Reference: 'I-D.finn-detnet-architecture' is defined on line 225, but no explicit reference was found in the text == Unused Reference: 'I-D.bas-usecase-detnet' is defined on line 230, but no explicit reference was found in the text == Unused Reference: 'IEEE802.1AS-2011' is defined on line 235, but no explicit reference was found in the text == Outdated reference: A later version (-05) exists of draft-finn-detnet-problem-statement-04 -- No information found for draft-finn-detnetarchitecture - is the name correct? Summary: 1 error (**), 0 flaws (~~), 9 warnings (==), 2 comments (--). Run idnits with the --verbose option for more detailed information about the items above. -------------------------------------------------------------------------------- 1 DetNet H. Wang 2 Internet Draft P. Wang 3 Interned status: Standards Track H. Yang 4 Expires: May 17, 2017 Chongqing University of 5 Posts and Telecommunications 6 November 13, 2016 8 Joint Deterministic Scheduling Requirements for Industrial 9 Field/Backhaul Networks 10 draft-wang-detnet-backhaul-requirements-00 12 Abstract 14 This document analyzes the joint deterministic scheduling 15 requirements for industrial field/backhaul networks, mainly 16 including the determinacy, time synchronization, compatibility and 17 scalability demands. 19 Status of this Memo 21 This Internet-Draft is submitted in full conformance with the 22 provisions of BCP 78 and BCP 79. 24 Internet-Drafts are working documents of the Internet Engineering 25 Task Force (IETF), its areas, and its working groups. Note that 26 other groups may also distribute working documents as Internet- 27 Drafts. 29 Internet-Drafts are draft documents valid for a maximum of six 30 months and may be updated, replaced, or obsoleted by other documents 31 at any time. It is inappropriate to use Internet-Drafts as reference 32 material or to cite them other than as "work in progress." 34 The list of current Internet-Drafts can be accessed at 35 http://www.ietf.org/ietf/1id-abstracts.txt 37 The list of Internet-Draft Shadow Directories can be accessed at 38 http://www.ietf.org/shadow.html 40 This Internet-Draft will expire on May 17, 2017. 42 Copyright Notice 44 Copyright (c) 2016 IETF Trust and the persons identified as the 45 document authors. All rights reserved. 47 This document is subject to BCP 78 and the IETF Trust's Legal 48 Provisions Relating to IETF Documents 49 (http://trustee.ietf.org/license-info) in effect on the date of 50 publication of this document. Please review these documents 51 carefully, as they describe your rights and restrictions with 52 respect to this document. Code Components extracted from this 53 document must include Simplified BSD License text as described in 54 Section 4.e of the Trust Legal Provisions and are provided without 55 warranty as described in the Simplified BSD License. 57 Table of Contents 59 1. Introduction ................................................ 2 60 2. Network Structure ........................................... 3 61 3. Joint scheduling requirements ............................... 4 62 3.1. Determinacy ............................................ 4 63 3.2. Time Synchronization ................................... 4 64 3.3. Compatibility .......................................... 4 65 3.4. Scalability ............................................ 4 66 4. Security Considerations ..................................... 5 67 5. IANA Considerations ......................................... 5 68 6. References .................................................. 5 69 6.1. Normative References ................................... 5 70 6.2. Informative References ................................. 5 71 Authors' Addresses ............................................. 6 73 1. Introduction 75 Using three industrial wireless networking standards: 76 ISA100[ISA100.11a], WirelessHART[WirelessHART] and WIA-PA[WIA-PA], a 77 deterministic network can be constructed by industrial field network. 78 However, this industrial field networks belonging to small and 79 medium-size networks whose network coverage is constant, for example, 80 a range of plant. Therefore, Industrial backhaul network can be 81 introduced to make the industrial field network access higher-level 82 network, or transit to other industrial field networks. Thus, a new 83 architecture network, the deterministic industrial field networks 84 - backhaul network is proposed in this draft. Some questions of 85 deterministic network have been described in the draft [draft-finn- 86 detnet-problem-statement-04], and architecture and application have 87 been illustrated in [draft-finn-detnet-architecture-04] and [draft- 88 bas-usecase-detnet-02] separately. 90 Used in industrial production, it has a very high demand on the 91 network data packet loss ratio, low jitter and deterministic and so 92 on. Besides, due to the backhaul network is heterogeneous with field 93 Network. The backhaul industry network, has a centralized controller, 94 can schedule network resources such as bandwidth and cache. However, 95 for some industrial field networks such as ISA100, WirelessHART, 96 these networks have their own system manager. At the same time, 97 there are some networks which have no system manager. Therefore, it 98 is an issue to be studied about how to carry out joint scheduling. 100 2. Network Structure 102 As shown in the figure 1, it is a typical deterministic industrial 103 field networks - backhaul networks structure. The field network is 104 composed of ISA100, which is the standard of the international 105 industrial wireless network. This network standard uses TDMA 106 mechanism to make the network time slot, and provides the 107 deterministic guarantee for the data. Then the field networks can be 108 access to industrial backhaul networks. At the other end of 109 industrial backhaul networks, can be another industrial field 110 networks, and can also be access to the Internet application, or 111 into enterprise information management system like MES/ERP. 113 +------------------------+ 115 | ISA100 field | 117 | wireless network | ------------+ 119 +------------------------+ | 121 +---------------------+ +-----------+ 123 | Industrial backhaul | |Internet or| 125 | network | ---| MES/ERP | 127 +---------------------| +-----------+ 129 +------------------------+ | 131 | ISA100 field | ------------+ 133 | wireless network | 135 +------------------------+ 137 Figure 1. Typical network structure 139 Thus, in such a network structure, the former field network nodes 140 deployed in a plant can communicate with the field network nodes 141 deployed in another plant through the industrial backhaul network. 142 At the same time, the Internet and information management system can 143 manage the sensor nodes of the field network remotely through the 144 industrial backhaul network. 146 3. Joint scheduling requirements 148 3.1. Determinacy 150 The data of industrial field network directly related to the 151 monitoring and control of industrial production process, so the 152 requirement of data determinism is very high, need data to arrive at 153 a certain time. Industrial field network-backhaul network is also a 154 kind of network which is mainly used in the process of industrial 155 production, so also need to meet the needs of the data determinism 156 in the joint scheduling. 158 3.2. Time Synchronization 160 Since the industrial field/backhaul network is a converged network 161 and need some scheduling methods to ensure deterministic data stream. 162 So it requires high time synchronization accuracy between devices in 163 the network. The time synchronization accuracy should be in a range 164 of 10ns to 10ms according to different network applications. At 165 present, the existing time synchronization protocol include IEEE1588 166 and IEEE802.1 As, which is developed by following Time Sensitive 167 Networking (TSN) Task Group 169 3.3. Compatibility 171 Industrial field network and backhaul network are both heterogeneous 172 networks. Industrial field networks such as ISA100, WirelessHART 173 usually have built-in systems management, which can allocate network 174 communication resources to conduct deterministic scheduling. Some 175 field networks have no system manager. While industrial backhaul 176 network is able to control the network with central controller, so 177 some mechanisms, interfaces, etc. will be necessary when conducting 178 joint scheduling to be compatibility with industrial field/backhaul 179 network. 181 3.4. Scalability 183 Generally, the field network data cannot be transmitted across 184 domain or across network, while in the deterministic industrial 185 field/backhaul network, the characteristic of cross-networks should 186 be supported. So data scalability should be ensured during joint 187 scheduling process. 189 4. Security Considerations 191 This memo includes no request to IANA. 193 5. IANA Considerations 195 This memo includes no request to IANA. 197 6. References 199 6.1. Normative References 201 6.2. Informative References 203 [ISA100.11a] 204 ISA/IEC, "ISA100.11a, Wireless Systems for Automation, 205 also IEC 62734", 2011, < 206 http://www.isa100wci.org/enUS/Documents/PDF/3405-ISA100- 207 WirelessSystems-Future-brochWEB-ETSI.aspx>. 209 [WirelessHART] 210 www.hartcomm.org, "Industrial Communication Networks - 211 Wireless Communication Network and Communication Profiles 212 - WirelessHART - IEC 62591", 2010. 214 [WIA-PA] 215 CN-GB. GB/T 26790.1-2011. Industrial wireless networks WIA 216 specification.Part 1: WIA System architecture and 217 communication specification for process automation (WIA- 218 PA)[S]. China: CN-GB, 2011. 220 [I-D.finn-detnet-problem-statement] 221 Finn, N. and P. Thubert, "Deterministic Networking Problem 222 Statement", draft-finn-detnet-problem-statement-04 (work in 223 progress), October 2015. 225 [I-D.finn-detnet-architecture] 226 Finn, N., Thubert, P., and M. Teener, "Deterministic 227 Networking Architecture", draft-finn-detnetarchitecture-03 228 (work in progress), March 2016. 230 [I-D.bas-usecase-detnet] 231 Kaneko, Y., Toshiba and Das, S, "Building Automation Use 232 Cases and Requirements for Deterministic Networking", draft- 233 bas-usecase-detnet-00 (work in progress), April 2016. 235 [IEEE802.1AS-2011] 236 IEEE, "Timing and Synchronizations (IEEE 802.1AS-2011)", 2011, 237 . 240 Authors' Addresses 242 Heng Wang 243 Chongqing University of Posts and Telecommunications 244 2 Chongwen Road 245 Chongqing, 400065 246 China 248 Phone: (86)-23-6248-7845 249 Email: wangheng@cqupt.edu.cn 251 Ping Wang 252 Chongqing University of Posts and Telecommunications 253 2 Chongwen Road 254 Chongqing, 400065 255 China 257 Phone: (86)-23-6246-1061 258 Email: wangping@cqupt.edu.cn 260 Hang Yang 261 Chongqing University of Posts and Telecommunications 262 2 Chongwen Road 263 Chongqing, 400065 264 China 266 Phone: (86)-23-6246-1061 267 Email: 18716322620@163.com