Abstract:
Enhanced Queued Arbitrated (QA) Functions, which can support applications requiring bandwidth guarantees and delay limits on a DQDB subnetwork, are specified. Connection-Oriented Convergence Functions (COCFs) using the enhanced QA Functions, which are necessary to support connection-oriented service, are also specified.
Keywords: Connection-Oriented Convergence Function (COCF), connection-oriented service, Distributed Queue Dual Bus (DQDB), Guaranteed Bandwidth (GBW), Queued Arbitrated (QA) Functions, Variable Bit Rate (VBR)
Content
1. Overview
1.1 Scope
1.2 Organization
Normative references
Abbreviations and acronyms
2. Overview of the connection-oriented service
2.1 Compressed video applications
2.2 Multiservice support
2.3 Multimedia application
2.4 Design objectives
2.4.1 Support of variable data rates
2.4.2 Bounded delay, guaranteed throughput
2.4.3 Conservation of bandwidth
2.4.4 Support of point-to-multipoint connections
2.4.5 Compatibility with base standard
2.5 Properties of the connection-oriented service types
2.6 Characteristics of priority levels
3. Connection-oriented service definition
3.1 CO-DATArequest
3.2 CO-DATAindication
4. Physical Layer service definitions
5. Functional architecture of a DQDB node supporting connection-oriented service
5.1 COCF blocks
5.1.1 COCF block using AAL3/4 (COCF3/4)
5.1.2 COCF block using AAL5 (COCF5)
5.1.3 Stream-Oriented Convergence Function block (COCFx)
5.2 Queued Arbitrated (QA) Functions block
5.2.1 QA Transmit functions
5.2.2 QA Receive functions
5.3 Common functions
6. DQDB Layer Protocol Data Units (PDUs) in support of connection-oriented service
6.1 DQDB Layer PDUs in support of connection-oriented service using AAL3/4
6.1.1 Transfer of CODUs using AAL3/4
6.1.2 PDU hierarchy for connection-oriented service using AAL3/4
6.2 DQDB Layer PDUs in support of connection-oriented service using AAL5
6.3 DQDB Layer PDUs in support of COCFx
7. DQDB Layer facilities in support of connection-oriented service
7.1 Counters
7.1.1 Peak rate counter (PEAK_CNTR_I_x)
7.1.2 Mean rate counter (MEAN_CNTR_I_x)
7.1.3 Transmit sequence number counter (TX_SEQUENCE_NUM)
7.2 Local reservation queue (LOCRES_I_x)
7.3 System parameters
7.3.1 Income of peak rate control (PEAK_INCR_I_x)
7.3.2 Slotcost of peak rate control (PEAK_COST_I_x)
7.3.3 Creditmax of peak rate control (PEAK_MAX_I_x)
7.3.4 Income of mean rate control (MEAN_INCR_I_x)
7.3.5 Slotcost of mean rate control (MEAN_COST_I_x)
7.3.6 Creditmax of mean rate control (MEAN_MAX_I_x)
7.4 Flags
7.4.1 CRC32 transmission flag (CRC32_CO_TX_CONTROL)
7.4.2 CRC32 receive flag (CRC32_CO_RX_CONTROL)
8. DQDB Layer operations
8.1 Distributed Queue operation
8.1.1 Distributed Queue State Machine (DQSM)
8.1.2 Traffic Shaping State Machine (TSSM)
8.1.3 REQ Queue Machine (RQM)
8.1.4 Bandwidth Balancing Machine (BWBM)
8.2 Reassembly operations
8.2.1 Reassembly operation of the COCF3/4
8.2.2 Reassembly operation of the COCF5
9. DQDB Layer management
A.1 Introduction
A.2 Instructions for completing the PICS proforma
A.2.1 Status symbols
A.2.2 Other symbols
A.2.3 General structure of the PICS proforma
A.2.4 Additional information
A.2.5 Exception information
A.2.6 Conditional status
A.3 Identification
A.3.1 Implementation identification
A.3.2 Protocol summary, IEEE Std 802.6j-1995
A.3.3 Claimed conformance to IEEE Std 802.6j-1995
A.4 Major capabilities and features commonly used as predicates
A.5 Functional architecture of a DQDB node supporting connection-oriented service
A.5.1 Connection-Oriented Convergence Function (COCF) blocks
A.5.2 Queued Arbitrated (QA) Functions Block
A.5.3 Common Functions block
A.6 DQDB Layer PDUs used in support of connection-oriented service
A.6.1 Transfer of CODU using AAL3/4
A.7 DQDB Layer facilities in support of connection-oriented service
