Transcript CCSDS SOIS Wireless

CCSDS SOIS Wireless WG
Fall 2009 Meeting Summary
ESTEC
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30-Oct-2009
CCSDS SOIS Wireless WG Meeting Summary
Goals for 2009 Fall Meeting
There were two main goals for this fall’s meeting:
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Discussion and identification of the necessary tasks for the
completion of the RFID Inventory Management Magenta Book (now
renamed “RFID-Based Inventory Management Systems”).
1)
Discussion and find consensus on outline of initial draft of the
spacecraft Magenta Book (now renamed “spacecraft onboard wireless
low-rate monitoring and control”).
2)
The WWG also had to review the required number Magenta Book
(MB) and try to scope them accurately.
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CCSDS SOIS Wireless WG Meeting Summary
RFID Wireless
First MB : RFID-Based Inventory Management Systems
1)
The group has discussed in detail and evolved the Inventory
Management (I/M) MB. We have refined the book’s structure and
agreed on the actual content to be written during the next months.
2)
Initial recommended practice for RFID-based I/M is
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The book will recommend the following standard for applications using RFID
technologies e.g. on ground and on the ISS.
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ISO 18000-6C standard, aka EPC Class 1 Gen 2
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- This standard defines the physical and logical requirements for a passive-backscatter,
Interrogator-talks-first (ITF), radio-frequency identification (RFID) system operating in the
860 MHz - 960 MHz frequency range. The system comprises Interrogators (also known as
Readers), and Tags (also known as Labels).
The recommended practices will be complemented with application profiles
and use-cases which still need to be written and added to the book.
Examples of application profiles are scenarios using RFID handheld and
portal-based systems.
The book schedule is on-track as detailed in the schedule slide (see last
slide)
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CCSDS SOIS Wireless WG Meeting Summary
Intra-Spacecraft Wireless (1/2)
Second MB : Spacecraft Onboard Wireless Low-Rate Monitoring and Control
(acronym: SOWL-RMonC)
1)
There was a clear need to insure that we properly scoped the MB and
that it was also evolvable. The reason for that is the very high number of
applications, scenarios and technologies that have to be properly
categorized to insure a coherent structure within and between the
different MBs.
2)
The SOWL-RMonC MB will cover sensor networks to be used onboard
spacecraft during its operational lifetime and during AIT phases.
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There has been several discussions on the state-of-the-art standards that
could achieve the goals targeted by this book. The three top-rated standards
are all built on top of the IEEE 802.15.4 PHY and some of them have slight
differences for what concerns the original 802.15.4 MAC layer:
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IEEE 802.15.4: 2.45GHz band, Carrier-Sense Multiple Access (listen before talk)
WirelessHART: is open-standard wireless networking technology developed by
HART Communication Foundation. The modified 802.15.4 MAC utilizes a time
synchronized, self-organizing, and self-healing mesh architecture. Unlike for
802.15.4, very few mature products are to be found.
ISA100.11a: The International Society for Automation generated a standard that is
designed to be open, insure proper operation in the presence of interference,
operate in harsh industrial environments. It is based on IEEE 802.15.4 (MAC and
physical layer), Time Synchronized Mesh Protocol, utilizes DSSS with
channel/frequency hopping (with black lists of noisy channels) and mesh routing. 4
CCSDS SOIS Wireless WG Meeting Summary
Intra-Spacecraft Wireless (2/2)
3)
At the present, the working group does not feel enough confident in
recommending one of these (very similar) technologies within the scope of the
CCSDS.
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Therefore, there has been an agreement to execute a series of tests and
comparisons of the standards to assess which standard shall be recommended.
NASA and ESA, helped by the Industry, will each perform testing of the above
systems prior to April-2010.
There is a non-negligible challenge in accurately comparing the technologies without
being biased by the particular implementations. The coming weeks will be used to
come with characteristics and a common way of testing.
Because NASA has already some experience with ISA100.11a and WirelessHART,
they will execute the tests and comparisons. ESA takes the responsibility of the
IEEE802.15.4 standard, while engaging itself in pursuing some internal efforts related
to ISA100.11a.
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4)
Another important discussion focused on if the recommended practices shall
cover the Network layer (routing, mesh) in order to insure interoperability of e.g.
European end-devices in an American-based wireless sensor network.
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The conclusion is that we shall indeed cover the network layer and therefore consider
the routing / meshing / topologies in the technology trade-off described above.
Similar to Zigbee, both ISA100.11a and WirelessHart are MAC-2-Application
standards. We thus need to select a network layer for the traditional IEEE802.15.4
PHY and MAC (e.g. 6LowPAN (IP over 15.4) and ZigBeePro evolution and uptake).
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CCSDS SOIS Wireless WG Meeting Summary
Other topics
1.
Number of books
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2.
The RFID-I/M MB should be released internally prior to the next meeting.
For the other book(s), the group decided to wait for the results of the
scheduled tasks (see previous slides) before proposing any hierarchy of
books targeting the spacecraft domain. We are working on the MB that will
recommend practices for wireless sensor systems within spacecraft or
habitats, but we are not yet sure about how many other books there should
be. This will be investigated (and hopefully decided) further during the next
April 2010 meeting.
Integration in the SOIS Architecture
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This topic has not been discussed during this meeting as we believe that a
more mature spacecraft domain book is needed prior to address the
integration of SOIS services throughout the wireless network.
This topic will be discussed in more details during the Spring 2010 meeting.
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CCSDS SOIS Wireless WG Meeting Summary
RFID-Based I/M MB Plan
Task/Milestone Description
Date
RFID-Based I/M MB out for informal internal review
15-Jan-2009
Informal RFID-Based I/M MB review period complete
01-Mar-2010
Incorporate reviews and forward to SOIS A.D./CESG
15-Mar-2010
MB publication preparation for agency review
complete; out for Agency Review
01-May-2010
Agency review complete
15-Jun-2010
Disposition of RIDS
15-Jul-2010
RFID-Based I/M MB publication and release
01-Sep-2010
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CCSDS SOIS Wireless WG Meeting Summary
WWG Spacecraft MB plan
Task/Milestone Description
Date
Drafting of the standard testing methodology and
metrics for the MB; document to ensure proper
comparisons
15-Jan-2010
Agency testing on 802.15.4, ISA100, WirelessHART
complete and technology trade-off
15-Mar-2010
Incorporate supporting test data into SOWL-RMonC
MB
30-Mar-2010
Spacecraft SOWL-RMonC MB initial draft
15-Apr-2010
Determine if ready to issue recommendations within
the SOWL-RMonC MB Spring 2010 CCSDS Meeting
05-May-2010
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CCSDS SOIS Wireless WG Meeting Summary