The Real-Time Channel Administration Protocol Bruce A. Mah The - - PDF document

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The Real-Time Channel Administration Protocol Bruce A. Mah The Tenet Group University of California, Berkeley and International Computer Science Institute Berkeley, California Hitachi-Tenet Meeting May 28-29, 1991 Bruce A. Mah The

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Bruce A. Mah The Real-Time Channel Administration Protocol 1/18

The Real-Time Channel Administration Protocol

Bruce A. Mah The Tenet Group University of California, Berkeley and International Computer Science Institute Berkeley, California Hitachi-Tenet Meeting May 28-29, 1991

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Bruce A. Mah The Real-Time Channel Administration Protocol 2/18

Synopsis Service Description Motivations Features of RCAP Channel Establishment Channel Teardown Channel Status

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Service Description of RCAP Channel Administration for the Tenet Real-Time Protocol Suite

Channel Setup Channel Teardown Channel Status

Tenet Data Delivery Protocols

Real-Time Message Transport Protocol (RMTP) Continuous Media Transport Protocol (CMTP) Real-Time Internet Protocol (RTIP)

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Bruce A. Mah The Real-Time Channel Administration Protocol 4/18

Motivations in the Design of RCAP Real-Time Channels

Explicit Setup and Teardown of Communication Channels Reservation of Critical Resources

Diversity of Requirements

Message-Based vs. Continuous Media Deterministic vs. Statistical Guarantees Performance Requirements Traffic Patterns

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Motivations in the Design of RCAP Internetworking Topology

FDDI FDDI ATM ATM Switches Routers FDDI Rings Hosts

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Features of RCAP Hierarchical Design

Level 0: End-to-End Level 1: Internetworking Level 2: Subnetworks (network-specific)

Abstraction of Lower-Level Details Communication with RTIP, RMTP, and CMTP Separation of Control and Delivery Mechanisms Message-Passing Between Entities

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Channel Establishment Using RCAP One Round Trip Along Channel Route

Forward (establish_request) Admission Control Tests Routing Tentative Resource Reservations Reverse (establish_accept) Reservations Confirmed Channel Established

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Channel Establishment Using RCAP

HR NSR ER ER NSR ER ER

... ...

Header Record: End-to-End Parameters Network Subheader Record: Internetwork Level Parameters Establishment Records: Local Parameters for Internetwork Level Nodes Network Subheader Record: Subnet Level End-to-End Parameters Establishment Records: Local Parameters for Subnet Level Nodes

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Channel Establishment Using RCAP

Header Record for Establishing an RMTP Channel

hr_length level_count protocol subprotocol xmin xave smax D J Z W U type reserved I 31 24 16 8 rtip_opt rmtp_opt user_control_length user_control bytes...

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Channel Establishment Using RCAP

Network Subheader Record for the Internetwork Level

level_length er_count nsr_length xmin xave I smax D J Z W U type Dcumul Drelax reserved reserved 31 24 16 8

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Channel Establishment Using RCAP

Establishment Record for the Internetwork Level

er_length er_number node_address dl dn j z w u B b f_ip b_ip f_lcid f_ifn b_lcid b_ifn dcumul drelax reserved 31 24 16 8

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Channel Establishment Using RCAP Entrance to a Subnetwork (forward pass) Exit from a Subnetwork (forward pass)

HR NSR ER ER NSR ER ER HR NSR ER ER ER HR NSR ER NSR ER HR NSR ER ER Internetwork Internetwork Internetwork Internetwork Subnetwork Subnetwork

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Channel Teardown Using RCAP User-Requested Channel Teardown

Initiated by Source or Destination Request (close_request) Resources Released Along Route Confirmation (close_confirm) State and Routing Information Discarded

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Channel Teardown Using RCAP Error Forcing Channel Teardown

Initiated by Any Node Along Path Real-Time Control and Management Protocol (RTCMP) Request (close_request) Resources Released along Route Confirmation (close_confirm) State and Routing Information Discarded

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Determining Channel Status Using RCAP One Round Trip Along Channel Route

Initiated by Channel Source Forward Pass (status_request) Nodes add Status Information to Status Request RCAP Control Message Reverse Pass (status_report) Nodes Return Status Report to Source Unchanged Status for Subnetwork Nodes is Retained

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Determining Channel Status Using RCAP ...

SRR SRR SRR SRR Status Request Records: Per-node Parameters and Status Information in Network-Dependent Form ATM: frametime, chunksize... Internetwork: local delay, local jitter...

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Determining Channel Status Using RCAP

Status Request Record for the Internetwork Level

srr_length srr_type node_address d j z w u buffers state reserved 31 24 16 8

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