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19、verview 1 2 Contents 3 Architecture Overview i 4 Foreword . ii 5 1 Introduction 1 6 1.1 Scope and Purpose . 1 7 1.2 Release History 1 8 2 References 2 9 2.1 Informative References 2 10 3 Definitions 3 11 3.1 Definitions . 3 12 3.2 Acronyms . 4 13 4 Architecture Overview . 6 14 4.1 PHY layer Service
20、. 6 15 4.1.1 General Principles 6 16 4.1.2 Modulation, Frequency Bands and Data Rates. . 6 17 4.1.3 Frame Characteristics . 6 18 4.1.4 ANSI/TIA PN-4957 Frame Detection 7 19 4.2 MAC sub-layer Service . 7 20 4.2.1 General Principles 7 21 4.2.2 Node Behavior . 8 22 4.2.3 Directed Data Transfer Overview
21、 9 23 4.2.4 Non-Directed Data Transfer Overview 10 24 4.3 Multi-hop Delivery Service sub-layer 10 25 4.3.1 General Principles 10 26 4.3.2 MHDS however it defines the Physical to Transport Layer 27 protocol support compatible with a range of application layer protocols specified for use in Smart Util
22、ity Network 28 applications, including RESTful http and CoAP. 29 30 ANSI/TIA-PN4957.000 14 5 Summary 1 This document provides an overview of the architecture for the ANSI/TIA-PN4957 series: 2 ANSI/TIA-PN-4957.100 Layer 1 Standard Specification for the Smart Utility Network 3 ANSI/TIA-PN-4957.200 Lay
23、er 2 Standard Specification for the Smart Utility Network 4 ANSI/TIA-PN-4957.210 Multi-hop Delivery Specification of a Data Link Sub-Layer 5 ANSI/TIA-PN-4957.300 Network Layer Specification 6 ANSI/TIA_PN-4957.400 Transport Layer Specification 7 Additional documents are referenced in Section 2. 8 9 T
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