IEEE 802.6-1990

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Local and Metropolitan Area Networks: Distributed Queue Dual Bus (DQDB) Subnetwork of a Metropolitan Area Network (MAN)

Published By	Publication Date	Number of Pages
IEEE	1990	336

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Description

New IEEE Standard – Inactive-Withdrawn. Withdrawn Standard. Withdrawn Date: Feb 07, 2003. No longer endorsed by the IEEE. This standard is part of a family of standards for local area networks (LANs) and metropolitan area networks (MANs) that deal with the Physical and Data Link Layers as defined by the ISO Open Systems Interconnection Reference Model. It defines a high-speed shared medium access protocol for use over a dual, counterflowing, unidirectional bus subnetwork. The Physical Layer and Distributed Queue Dual Bus (DQDB) Layer are required to support a Logical Link Control (LLC) Sublayer by means of a connectionless Medium Access Control (MAC) Sublayer service in a manner consistent with other IEEE 902 networks. Additional DQDB Layer functions are specified as a framework for other services. These additional functions will support Isochronous Service Users and Connection-Oriented Data Service users, but their implementation is not required for conformance.

PDF Catalog

PDF Pages	PDF Title
21	1 Introduction 1.1 Scope
22	Scope of IEEE Std
23	1.2 Applicability 1.3 Definitions
31	1.4 Acronyms
33	1.5 References
34	1.6 Conformance
35	1.7 Notation Service Specification Method and Notation Layer Service Model
36	Time Sequence Diagram
37	1.7.2 State Machine Notation 1.8 Organization of the Standard
39	Overview 2.1 DQDB Subnetwork Dual Bus Architecture
40	Dual Bus Architecture
41	Example Access Unit Attachment
42	Access Control to the Dual Bus Subnetwork
43	Queue Formation on Bus A
47	Queueing for Access (Bus A)
48	Gaining Access (Bus A)
50	Provision of DQDB Layer Services
51	DQDB Layer Services
52	IMPDU
53	Format of a DMPDU
54	Transfer of an IMPDU
58	Performance of the Distributed Queue
59	DQDB Subnetwork Configuration Control
60	Looped Bus Topology
61	Node Functional Architecture Physical Layer Functions
62	DQDB Node Functional Architecture
63	DQDB Layer Functions
67	DQDB Layer Service Definition
68	MAC Service Provided to the LLC Sublayer 3.1.1 MA-UNITDATA request
69	3.1.2 MA-UNITDATA indication
70	3.1.3 MA-STATUS indication 3.2 Isochronous Service
71	3.2.1 ISU-DATA request
72	3.2.2 ISU-DATA indication Connection-Oriented Data Service
73	Physical Layer Service Definition
74	4.1 Ph-DATA request Physical Layer Services (at each node)
76	4.2 Ph-DATA indication
77	indication primitives
78	Node Not Performing Head of Bus Functions Node Not Performing Head of Bus Functions
79	Node Performing Head of Bus Functions Node Not Performing Head of Bus Functions
80	Node Performing Head of Bus A Function
82	Node Performing Head of Bus B Function
83	4.4 Ph-TIMING-SOURCE request Node Performing Head of Bus A and Head of Bus B Functions
84	4.5 Ph-TIMING-MARK indication
85	4.6 Ph-STATUS indication
87	5 DQDB Node Functional Description Provision of MAC Service to LLC
88	DQDB Node Functional Architecture
89	MAC Convergence Function (MCF) Block DQDB Layer Functions to Support LLC Service
90	MCF Transmit Functions
93	Segmentation of an IMPDU of Greater than 88 Octets Length
95	Block
98	MCF Receive Functions
99	Receive Interaction between QA Functions Block and MCF Block
103	Queued Arbitrated (QA) Functions Block
105	QA Functions Block Transmit Functions
106	QA Functions Block
109	Common Functions Block
110	QA Functions Block Receive Functions
111	QA Functions Block
113	MAC Sublayer Service Management Functions Convergence Function Block
114	Provision of Isochronous Service Isochronous Convergence Function (ICF) Block
115	DQDB Layer Functions to Support Isochronous Service
116	DQDB Node Functional Architecture Showing ICF Block
117	Pre-Arbitrated (PA) Functions Block
118	Block
119	Functions Block
120	PA Functions Block
121	Isochronous Service Provider Management Functions Provision of Other Services Connection-Oriented Data Service
122	Service
123	DQDB Node Functional Architecture Showing COCF Block
124	Block COCF Block
125	5.4 Common Functions Functions Block
126	Octets
127	Functional Data Path for the Common Functions Block Fig
128	Common Functions Block
129	QA Functions Block
130	Common Functions Block PA Functions Block
131	Subnetwork Configuration Control Function
133	Default Slot Generator Function
134	Valid Bus Identification at Start-up
135	Default Slot Generator Function
138	5.4.3 Head of Bus Functions
139	Key to Functional Data Path Diagrams Fig
140	Function
141	Bus A Function
142	5.4.4 MID Page Allocation Functions Bus B Function
143	Head of Bus B Functions
150	DQDB Layer Protocol Data Unit (PDU) Formats 6.1 Ordering Principles 6.2 Slot Access Control Field (ACF) Slot Format Fig Access Control Field Fig
151	Queued Arbitrated (&A) Slot REQUEST Field Fig Slot Access Control Field Codings
152	6.3.1 QA Segment QA Segment Format Fig QA Segment Header Fields Fig
153	6.4 Pre-Arbitrated (PA) Slot
154	6.4.1 PA Segment PA Segment Format Fig PA Segment Header Fields Fig
155	6.5 Transfer of MAC Service Data Unit (MSDU)
156	6.5.1 Initial MAC Protocol Data Unit (IMPDU) IMPDU Format Fig Common PDU Header Format Fig
158	Address Field Fig Format Fig Coding of ADDRESS-TYPE Subfield
160	PVPL Field Format Fig
161	QOS/CIB/HEL Field Format Fig Coding of the PI Field
162	Coding of QOS-DELAY
164	Derived MAC Protocol Data Unit (DMPDU) Common PDU Trailer Format Fig
165	Segmentation of an IMPDU into DMPDUs Fig
166	DMPDU Format Fig DMPDU Header Format DMPDU Type
168	Protocol Data Unit (PDU) Hierarchy for MAC Service DMPDU Trailer Format
169	(a) MAC Connectionless Service PDU Hierarchy
170	(b) MAC Connectionless Service PDU Hierarchy (continued;)
171	Access Control Field Conformance
172	Queued Arbitrated Segment Conformance Pre-Arbitrated Segment Conformance
173	IMPDU Conformance
174	DMPDU Conformance
175	DQDB Layer Facilities 7.1 Timers Reassembly IMPDU Timer (RIT)
176	Head of Bus Arbitration Timer (Timer-H) 7.2 Counters Request Counter (REQ-1-CNTR) Countdown Counter (CD-I-CNTR)
177	Local Request Queue Counter (REQJ-Q) Page Counter (PAGE-CNTR)
178	Bandwidth Balancing Counter (BWB-CNTR) (TX-SEQUENCE-NUM) 7.3 System Parameters Reassembly IMPDU Timer Period (RIT-PERIOD) (Timer-H-PERIOD)
179	7.3.3 Quality of Service Map (QOS-MAP) (RESERVED-MID-PAGES) Maximum Number of MID Pages (MAX-MID-PAGES) Bandwidth Balancing Modulus (BWB-MOD)
180	7.4 Flags Configuration Control Flag (CC-12-CONTROL) Default Configuration Control Flag (CC-D2-CONTROL) CRC32 Generation Flag (CRC32-GEN-CONTROL)
181	CRC32 Checking Flag (CRC32-CHECK-CONTROL) Resource Status Indicators Configuration Control Status Indicator (CC-STATUS)
182	Head of Bus Operation Indicator (HOB-OPERATION) Link Status Indicator (LINK-STATUS) External Timing Source Status Indicator (ETS-STATUS)
184	8 DQDB Layer Operation 8.1 Distributed Queue Operation Distributed Queue State Machine (DQSM)
186	DQSM for Bus x at Priority Level I L
188	8.1.2 REQ Queue Machine (RQM)
189	Bandwidth Balancing Machine (BWBM)
190	8.2 Reassembly Operation Reassembly State Machine (RSM)
192	Instance of Reassembly State Machine (RSM)
196	Segment Header Check Sequence Processing Functional Diagram for HCS Decoder
197	HCS Decoder State Machine
198	DQDB Layer Management Interface (LMI) DQDB Layer Management Interface (LMI) Model
199	DQDB LMI Primitives
201	VCI Management Functions 9.2.1 LM-ACTION invoke (CL-VCI-ADD)
203	9.2.2 LM-ACTION invoke (CL-VCI-DELETE)
204	LM-ACTION invoke (OPEN-CE-ICF)
206	LM-ACTION invoke (OPEN-CE-COCF)
207	LM-ACTION invoke (CLOSE-CE)
208	LM-ACTION invoke (PA-VCI-ADD-HOB)
209	LM-ACTION invoke (PA-VCI-DELETE-HOB) Header Extension Management Functions
210	LM-ACTION invoke (HEXT-INSTAL)
211	LM-ACTION invoke (NEXT-PURGE) Message Identifier (MID) Management Functions
212	LM-ACTION invoke (MID-PAGE-GET)
213	LM-ACTION reply (MID-PAGE-GET) LM-ACTION invoke (MID-PAGE-RELEASE)
214	LM-ACTION reply (MID-PAGE-RELEASE)
215	LM-EVENT notify (MID-PAGE-LOST) 9.5 Address Management Functions
216	9.5.1 LM-ACTION invoke (ADDRESS-ADD) 9.5.2 LM-ACTION invoke (ADDRESS-DELETE)
217	System Parameter Management Functions
219	Configuration Control Function Management Functions LM-SET invoke (CC-FLAG)
220	CRC32 Control Flag Management Functions 9.8.1 LM-SET invoke (CRC32-FLAG)
221	Other Management Functions LM-ACTION invoke (RESET) Primitives DQDB Layer Management Interaction
223	10 DQDB Layer Management Protocol 10.1 DQDB Layer Management Information Octets
224	Bus Identification Field (BIF) DQDB Layer Management Information Octets
225	SubNetwork Configuration Field (SNCF) SNCF Subfield Formats Table 10-1 BIF Codes
226	MID Page Allocation Field (MPAF) DSGS Codes Table 10-3 HOBS Codes ETSS Codes
227	MPAF Subfield Formats PR Codes
228	10.2 Configuration Control Protocol PCM Codes PCC Codes
229	Functions in a Node
230	the Default Slot Generator Function the Default Slot Generator Function
231	Function Type Generation of Subnetwork Configuration Field Subfields
232	Received at a Node Containing the Default Slot Generator Received at a Node Not Containing the Default Slot Generator
234	Default Configuration Control State Machine
235	Diagram
238	Head of Bus Function Operations Table
239	Source Function Operations Table
240	Configuration Control Type 2 State Machine
242	(CC-2 Function)
246	Table 10-11 Configuration Control Type 2 Function Operations Table
247	Configuration Control Type 1 State Machine
248	(CC-1 Function)
252	Table 10-12 Configuration Control Type 1 Function Operations Table
253	10.3 MID Page Allocation Protocol
255	Page Counter State Machine (PCSM) for Head of Bus A MID Page Allocation Protocol Information Flow
257	Page Reservation State Machine for Head of Bus A
258	Page Counter Modulus Operation for Head of Bus A Page Counter State Machine (PCSM) for Bus A or Bus B
259	11.2 Node Configuration Fig 10-11 Page Counter State Machine for Bus x (PCSM-x)
261	10.3.5 Keep Page State Machine (KPSM)
262	Get Page State Machine (GPSM)
263	Fig 10-12 Get Page State Machine (GPSM)
265	11 Physical Layer Principles of Operation 11.1 Architectural Considerations 11.3 Duplex Operation of the Transmission Link
266	Physical Layer Connection State Machine (PLCSM)
267	11.4 Node Synchronization Physical Layer Connection State Machine (PLCSM)
268	Physical Layer Connection State Machine
269	11.5 Physical Layer Maintenance Functions Fault Detection within Nodes 11.5.2 Node Isolation Abstract Encoding of LSS
270	Fault Detection on Transmission Links 11.5.4 Nodes Not Supporting Head of Bus Functions 11.6 Physical Layer Facilities Control Flag
271	Head of Bus Capable Flag (HOB-CAPABLE)
272	Systems 12.1 Introduction DS3 Relationship to the PLCP Transmission System Relationship to the PLCP
273	12.2 The PLCP Frame Format 12.3 PLCP Field Definitions Framing Octets Al, A2) Path Overhead Identifier (P11-PO) 12.3.3 PLCP Path Overhead Octets
274	The PLCP Frame Format
275	Path Overhead Identifier (POI) Octet Al and A2 Codes Path Overhead Identifier (POI) Codes
276	PLCP Path Status (Gl) LSS Codes
277	12.3.4 Trailer Nibbles 12.4 PLCP Behavior During Faults Table 12-4 Cycle/Stuff Counter Codes
278	12.5 PLCP Behavior During DQDB Layer out of Service
279	12.6 PLCP Framing PLCP Framing State Machine Transition Diagram
281	Link Status Signal Operations Table Table 12-5 Link Status Signal Operations Table
282	12.6.2 Physical Layer Frame Timing Operations Table Table
284	Requirements for Supporting Connection Setup A1 Introduction
285	Call Establishment Model Call Establishment Procedures Functional Elements for Call Setup
286	Call
288	Layer Management Message Flows at the Originating Side
290	Layer Management Message Flows at the Terminating Side
291	A4 Call Clearing Procedures
292	Layer Management Message Flows at the Terminating Side
293	A5 References
294	Bus Selection for Connectionless Service B1 Introduction Bothways Transmission Bus Selection Tables
295	Open Dual Bus Topology Looped Dual Bus Topology
296	Looped Topology Reconfigured into Open Topology
297	Self-Learned Tables B5 Table Maintenance by Aging Out
298	A Distributed Scheme for Table Maintenance B7 References
299	Requirement for Equal Slot Rates on Both Buses
300	Relationship between DQSM and RQM
301	Local Request Queue
302	Common Functions Block Architecture
303	Slot Generator Function
304	Default Slot Generator Function
305	Rationale for the Subnetwork Timing Reference Selection Hierarchy F1 Introduction Rationale for the Hierarchy
307	Example Stable Subnetwork Configurations
308	Key to Subnetwork Configuration Diagrams
309	Looped Configuration: External Timing at Node with SG-D
310	One Other Node
312	Looped Configuration: Local Timing at Node with SG-D
313	with SG-D
314	Externally Timed
315	Externally Timed
316	Externally Timed
317	Locally Timed
318	Locally Timed
319	Locally Timed
320	(and Upstream on Bus B) from Node with SG-D
321	(and Upstream on Bus A) from Node with SG-D
322	(Node with SG-D at Head of Bus A)
323	Head of Bus B)
324	Remote from Node with SG-D
325	Remote from Node with SG-D
326	Island Configuration: No External Timing Island Configuration: External Timing in Middle of Bus
327	Island Configuration: External Timing at Head of Bus B Island Configuration: External Timing at Head of Bus A
328	Undergoing Configuration Changes H1 Introduction H2 Configuration Control Protocol Facilities
329	Rationale for the Head of Bus Arbitration Timer H4 Example of Configuration Control Protocol
331	Looped Configuration of Four Nodes
332	Failed Link Between Nodes Q and S
333	Arbitration Completed
334	Reconfigured to Open Configuration

Additional information

Standard Title	Local and Metropolitan Area Networks: Distributed Queue Dual Bus (DQDB) Subnetwork of a Metropolitan Area Network (MAN)
Published Code	IEEE
Publication Date	1990
Pages Count	336

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IEEE 802.6-1990

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