1. MCCAOP Advertisements
July 2010
doc.: IEEE /815r0
July 2010
MCCAOP Advertisements
Date:
Authors:
Michael Bahr, Siemens AG
Michael Bahr, Siemens AG

2. July 2010
doc.: IEEE /815r0
July 2010
Abstract
This presentation explains the concepts and motivation of the proposed changes for the MCCAOP advertisment as given in 11-10/814.
Michael Bahr, Siemens AG
Michael Bahr, Siemens AG

3. Mesh STA A This is Mesh STA “San Diego”. It is MCCAActivated (is true)
July 2010
Mesh STA A
This is Mesh STA “San Diego”.
It is MCCAActivated (is true)
Mesh STA “San Diego” has to track its own MCCAOP reservations (TX-RX and broadcast times) as well as the MCCAOP reservations of its neighbor mesh STAs (interfering times).
Michael Bahr, Siemens AG

4. July 2010
MCCAOP Advertisement
Mesh STA „San Diego“ has to advertise its tracked MCCAOP reservations.
The set of tracked MCCAOP reservations a mesh STA wants to advertise, whether complete or partial, is called an MCCAOP advertisement.
MCCAOP advertisement can be complete.
MCCAOP advertisement can be partial.
Michael Bahr, Siemens AG

5. Partial vs. Complete MCCAOP Advertisement
July 2010
Partial vs. Complete MCCAOP Advertisement
at the transmitter side
can send only new or changed MCCAOP reservations
can send only selected tracked MCCAOP reservations
partial MCCAOP advertisement reduces size
at the receiver side
complete MCCAOP advertisement:
replaces all MCCAOP reservations previously received from the same transmitter with the latest MCCAOP advertisement.
non-advertised MCCAOP reservations are deleted
partial MCCAOP advertisement:
advertised MCCAOP reservations can be only added.
non-advertised MCCAOP reservations must not be deleted.
Michael Bahr, Siemens AG

6. July 2010
Partial Reports
concept of partial/complete is also valid for reports (TX-RX, broadcast, interfering)
TX-RX and broadcast report are complete. TX-RX / broadcast report of previous advertisement are replaced.
Interfering report is partial. MCCAOP reservations are appended.
Michael Bahr, Siemens AG

7. MCCAOP Advertisements Element
July 2010
MCCAOP Advertisements Element
MCCAOP advertisement is transmitted in MCCAOP Advertisements element
mesh STA can track many reservations
potentially up to 65535
MCCAOP Advertisements Element can hold only up to 62 MCCAOP reservations
Mechanism for splitting MCCAOP advertisement over multiple MCCAOP Advertisements elements provided
Michael Bahr, Siemens AG

8. Multiple MCCAOP Advertisements Elements
July 2010
Multiple MCCAOP Advertisements Elements
MCCAOP Advertisement Sequence Number:
tuple <MCCAOP Advertisement Sequence Number, transmitter of MCCAOP Advertisement element> uniquely identifies MCCAOP advertisement
identifies MCCAOP Advertisements elements that belong together
Advertisements Element Identifier
identifier of MCCAOP Advertisements elements belonging to the same MCCAOP advertisement
consecutive sequence: starts at 0, incremented by 1
Last Advertisements Element
indicates last MCCAOP Advertisements element in the consecutive sequence
Michael Bahr, Siemens AG

9. Frames with MCCAOP Advertisements Elements
July 2010
Frames with MCCAOP Advertisements Elements
MCCAOP Advertisements frame
every MCCAOP Advertisements element of an MCCAOP advertisement
Beacon frame
only one MCCAOP Advertisements element at a time
MCCAOP advertisements that require multiple MCCAOP Advertisements elements are transmitted in multiple subsequent Beacon frames
reduces beacon bloat
Probe Response frame
sent only once, but already full of bytes
only one MCCAOP Advertisements element, maybe partial MCCAOP advertisement
Michael Bahr, Siemens AG

10. Distributed Report subfield
July 2010
Distributed Report subfield
Scope of Distributed Report subfield:
type of report (TX-RX, broadcast, or interfering)
MCCAOP Advertisments element
indicates whether a TX-RX, broadcast, or interfering report is distributed over multiple MCCAOP Advertisements elements (of the same MCCAOP advertisement)
if not (Distributed Report subfield is set to 0):
it is sufficient to consider only this MCCAOP Advertisements element in order to know all MCCAOP reservations of this report (TX-RX, broadcast, or interfering)
receiver can update its tracked MCCAOP reservations even if it did not receive all MCCAOP Advertisements elements of the MCCAOP advertisement (for instance, when missing a beacon)
Michael Bahr, Siemens AG

11. Specification of MCCAOP Advertisements Element
July 2010
Specification of MCCAOP Advertisements Element
Michael Bahr, Siemens AG

12. Specification of MCCA Information Field
July 2010
Specification of MCCA Information Field
Michael Bahr, Siemens AG

13. Specification of MCCAOP Reservation Report Field
July 2010
Specification of MCCAOP Reservation Report Field
Michael Bahr, Siemens AG

14. References 11-10/814 „MCCAOP Advertisements“ IEEE 802.11s D6.0
July 2010
References
11-10/814 „MCCAOP Advertisements“
contains normative text implementing these ideas
IEEE s D6.0
Michael Bahr, Siemens AG