IEC 62056-46-2007

【实例简介】IEC 62056-46-2007

CONTENTS

FOREWORD 4

INTRODUCTION 6

1. 1 Scope 7
2. 2 Normative references 7
3. 3 Terms, definitions and abbreviations 8
4. 4 Overview 9
1. 4.1 The LLC sub-layer 9
2. 4.2 The MAC sub-layer 9
3. 4.3 Specification method 10
4. 5 The LLC sub-layer 10
5. 5.1 The role of the LLC sub-layer 10
6. 5.2 Service specification for the LLC sub-layer 11
1. 5.2.1 Setting up the Data Link Connection 11
2. 5.2.2 Disconnecting the Data Link Connection 14
3. 5.2.3 Data communication 18
7. 5.3 Protocol specification for the LLC sub-layer 22
1. 5.3.1 Overview 22
2. 5.3.2 LLC protocol data unit (LPDU) structure 22
3. 5.3.3 State transition tables for the LLC sub-layer 23
4. 6 The MAC sub-layer 24
8. 6.1 HDLC selections 24
9. 6.2 Service specification for the MAC sub-layer 25
1. 6.2.1 Setting up the MAC connection 25
2. 6.2.2 Disconnecting the MAC connection 28
3. 6.2.3 Data communication 33
10. 6.3 Physical layer services used by the MAC sub-layer 35
1. 6.3.1 Overview 35
2. 6.3.2 Setting up a physical link 36
3. 6.3.3 Disconnecting the physical link 36
4. 6.3.4 Data communication 36
11. 6.4 Protocol specification for the MAC sub-layer 36
1. 6.4.1 The MAC PDU and the HDLC frame 36
2. 6.4.2 MAC addressing 38
3. 6.4.3 Command and response frames 42
4. 6.4.4 Elements of the procedures 45
5. 6.4.5 State transition diagram for the server MAC sub-layer 60

Annex A (informative)  FCS calculation 62

Annex B (informative)  Data model and protocol 65

Annex C (informative)  Data link layer management services 66

Figure 1 – Data Link (LLC) services for setting up the Data Link Connection 11

Figure 2 – Data Link (LLC) services for disconnecting the Data Link Connection 15

Figure 3 – Data link layer data communication services 19

Figure 4 – The ISO/IEC 8802-2 LLC protocol data unit format 22

Figure 5 – The used LLC protocol data unit format 22

Figure 6 – MAC sub-layer services for setting up the MAC (DL) connection at the client

and server sides 25

Figure 7 – MAC sub-layer services for disconnecting the MAC (DL) connection at the

client and server sides 29

Figure 8 – MAC sub-layer data communication services 33

Figure 9 – Physical layer services used by the MAC sub-layer 36

Figure 10 – MAC sub-layer frame format (HDLC frame format type 3) 36

Figure 11 – Multiple frames 37

Figure 12 – The frame format field 37

Figure 13 – MSC for long MSDU transfer in a transparent manner 54

Figure 14 – Example configuration to illustrate broadcasting 55

Figure 15 – Sending out a pending UI frame with a .response data 56

Figure 16 – Sending out a pending UI frame with a response to a RR frame 57

Figure 17 – Sending out a pending UI frame on receipt of an empty UI frame 57

Figure 18 – State transition diagram for the server MAC sub-layer 61

Figure B.1 – The three-step approach of COSEM 65

Figure C.1 – Layer management services 66

Table 1 – State transition table of the client side LLC sub-layer 23

Table 2 – State transition table of the server side LLC sub-layer 24

Table 3 – Table of reserved client addresses 40

Table 4 – Table of reserved server addresses 40

Table 5 – Handling inopportune address lengths 42

Table 6 – Command and response frames 42

Table 7 – Control field format 43

Table 8 – Example for parameter negotiation values with the SNRM/UA frames 50

Table 9 – Summary of MAC Addresses for the example 55

Table 10 – Broadcast UI frame handling 55

【实例截图】