1. MCCAOP Advertisements
November 2010
doc.: IEEE /815r1
November 2010
MCCAOP Advertisements
Date:
Authors:
Michael Bahr, Siemens AG
Michael Bahr, Siemens AG

2. November 2010
doc.: IEEE /815r1
November 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. November 2010
# MCCAOP Reservations
The draft allows for tracked MCCAOP reservations at a mesh STA.
Example for lots of MCCAOP reservations at a mesh STA:
Michael Bahr, Siemens AG

4. # Tracked MCCAOP Reservations at Mesh Gate
November 2010
# Tracked MCCAOP Reservations at Mesh Gate
# flows in network f = s * m * #flows/STA
MCCAOPs at G is:
f (NG) + f (GN)
f (MN) + f (NM)
m + n + 1 for Beacons
Michael Bahr, Siemens AG

5. Mesh STA A This is Mesh STA “Dallas”. It is MCCAActivated (is true)
November 2010
Mesh STA A
This is Mesh STA “Dallas”.
It is MCCAActivated (is true)
Mesh STA “Dallas” 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

6. MCCAOP Advertisement Set
November 2010
MCCAOP Advertisement Set
Mesh STA „Dallas“ 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 „MCCAOP Advertisement Set“.
An MCCAOP Advertisement Set can be complete.
An MCCAOP Advertisement Set can be partial.
Michael Bahr, Siemens AG

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

8. November 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. Non-advertised TX-RX and broadcast times are deleted.
Interfering report is partial. MCCAOP reservations are appended or updated. No Interfering time can be deleted.
Michael Bahr, Siemens AG

9. MCCAOP Advertisements Element
November 2010
MCCAOP Advertisements Element
MCCAOP Advertisement Set is encoded 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 Set over multiple MCCAOP Advertisements elements provided
Michael Bahr, Siemens AG

10. Multiple MCCAOP Advertisements Elements
November 2010
Multiple MCCAOP Advertisements Elements
MCCAOP Advertisement Set Sequence Number:
tuple <MCCAOP Advertisement Set Sequence Number, transmitter of MCCAOP Advertisement element> uniquely identifies MCCAOP advertisement set
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

11. Frames with MCCAOP Advertisements Elements
November 2010
Frames with MCCAOP Advertisements Elements
MCCAOP Advertisements frame
MCCAOP Advertisements elements of the same MCCAOP advertisement set
Beacon frame
only one MCCAOP Advertisements element at a time
MCCAOP advertisement sets 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 set (most important MCCAOP reservations)
Michael Bahr, Siemens AG

12. Distributed Report subfield
November 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 set) or not
if not (Distributed Report subfield is equal 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 set (for instance, when missing a beacon)
Michael Bahr, Siemens AG

13. Specification of MCCAOP Advertisements Element
November 2010
Specification of MCCAOP Advertisements Element
Michael Bahr, Siemens AG

14. Specification of MCCA Information Field
November 2010
Specification of MCCA Information Field
Michael Bahr, Siemens AG

15. Specification of MCCAOP Reservation Report Field
November 2010
Specification of MCCAOP Reservation Report Field
Michael Bahr, Siemens AG

16. References 11-10/814r1 „MCCAOP Advertisements“ IEEE 802.11s D7.02
November 2010
References
11-10/814r1 „MCCAOP Advertisements“
contains normative text implementing these ideas
IEEE s D7.02
Michael Bahr, Siemens AG