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CCSDS 2007 Fall Meeting

SOIS Plenary Chris Taylor Estec

(27/09/2007

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Agenda

• Meeting Overview for the week

• Status since last meeting

• Supporting activities

• AOB

• Joint working group meeting…..

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Overview of the Week

• Monday (all day) – Status since last meeting– Supporting developments– Rid Processing………

• Tuesday (all day)– Plug and Play discussion– Use cases– Agreement on approach

• Wednesday (morning)– Joint AMS - Apps service meeting – Agreement on SOIS subset

• Thursday (morning)– Apps service WG

• Friday (Morning +)– Plenary – Consolidation and action assignment

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Status Recap

• At the last meeting we achieved general consensus on the overall architecture, services and approach to be taken for development

• Several draft recommendations and a supporting Green book were delivered by the working group

• After discussion the CESG agreed to release the Draft books for Agency review with a decision pending on Magenta or Blue

• Rids have been received and will be processed during the meeting (includes input from dedicated SOIS/SpaceWire working group)

• Draft Red books are still pending on the Application support layer in relation to plug and play – topic of dedicated meeting this week

• Note that SOIS is mainly tasked with developing services to which other standards bodies will develop protocols

SOIS overall Architecture

DataLinkLayer

User Applications

SpaceWireEthernet IEEE1394 CAN 1553

Denotes service access point

Network Protocol

Transport ProtocolTransferLayer

USB ONE WireIEEE-802.11

PacketService

MemoryRead/Write

Service

TimeDistribution

Service

DeviceDiscovery

Service

TestService

Sub-NetworkLayer Data Link Convergence Functions

DeviceEnumeration

Service

ApplicationSupport Layer

TimeAccessService

FileServices

MessageTransferService

Cmd & DataAcquisitionServices

SOIS – Software ContextOBC/Processor Module

Basic Software

OBC Hardware

N/W Init & Config

CPU RM UART

SpW TimeCode Register

EDAC Watchdog

RTOS

Data Handling S/W(PUS Services Implementation)

Applications(e.g. AOCS, Battery Mgmt, Thermal Mgmt)

TimerSFGM

SSMM

Devices(Transducers,

Payloads & Instruments)

TM/TC

Onboard Communications H/W(e.g. MIL-STD-1553B, SpaceWire, RS232/422, Pulsed, etc.)

IO Drivers

SOIS

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Status Recap

• The following books have been released for Agency review:

– Green Book

– APP Device Access Service APP Device Data Pooling Service APP File Access Service APP Time Access Service

– Subnetwork Packet Service Subnetwork Test Service RID Subnetwork Time Distribution ServiceSubnetwork Device Discovery Service Subnetwork Memory Access Service

• The following books still need to be developed:

– Message Transfer service– Device Enumeration service

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Supporting activities (ESA)

• At ESA we have several supporting activities that are SOIS related:

– SpaceWire working group has been tasked to develop SOIS compliant protocols– ECSS (European Cooperation for Space Standardisation) Mil bus working group

tasked with developing SOIS compliant protocol (WG draft available) – ECSS work item initiated for SOIS compliant CAN bus protocol

– We have held several meetings with European industry with a view of harmonising the flight data handling system, this will result in a standard reference architecture for which SOIS will be used as the communication element

– An ITT has been released for SOIS prototyping, the results of which will be integrated into an Estec reference test bed (output mid 2008)

– Several additional ITT’s are under preparation to be released in 2008

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Supporting activities (ESA)cPCI Bus

TM/TCAT697Board

GPIOBoard

AT697 Interface Board1553, Can, SpW

x2x3 x2

UARTs

I/O

RASTACDMU

SpW

CAN

1553

Host PCDevelopment& Monitoring

Eth

ern

et

Application services

Subnetworkservices

SpW 1553

Test S/W

Test S/W

Test S/W

Test S/W

Application services

Subnetworkservices

SpW 1553

Test S/W

Test S/W

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Supporting activities (ESA)

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Summary

• Although developments have moved slower than we would of wished, there are a number of background activities giving support and emphasis

• Missions are also interested with SOIS based implementations being offered by industry

• What is needed now is more prototyping based on real use-cases to show the benefit of SOIS and consolidate the specifications

• Main goal of the week is to complete the RID process and develop the requirements for plug and play to a point where the remaining red books can be drafted

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AOB

• Personal changes

– Glen Rakow (NASA) adopted as deputy lead for the Subnetwork Services WG– Max Ciccone (ESA) proposed as deputy lead for the Applications Service s WG

• Any more? ….

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RID Processing

• Application Support services – Lead Stuart

• Subnetwork Services – Lead Dai