1. HWMP Specification Update
Month Year
doc.: IEEE /1800r0
November 2006
HWMP Specification Update
Date:
Authors:
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Guenael Strutt, Motorola
Guenael Strutt, Motorola

2. Month Year
doc.: IEEE /1800r0
November 2006
Abstract
This presentation describes the changes made to the HWMP routing protocol in document r1
Guenael Strutt, Motorola
Guenael Strutt, Motorola

3. Month Year
doc.: IEEE /1800r0
November 2006
HWMP
Clause 11A.4 of draft P802.11s-D0.04 is “Hybrid Wireless Mesh Protocol (HWMP): Default path selection protocol for interoperability”.
There are numerous unresolved comments relating to clause 11A.4: 168, 169, 170, 171, 173, 174, 175, 176, 178, 179, 181, 185, 186, 188, 189, 190, 191 and 192.
We wrote a reference overview ( r1) in July
We completed the resolution of the comments with r1 in November
So… what are the differences between the previous HWMP specification and the new one?
Guenael Strutt, Motorola
Guenael Strutt, Motorola

4. When do you send a RREP? (D0.04)
Month Year
doc.: IEEE /1800r0
November 2006
When do you send a RREP? (D0.04)
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Guenael Strutt, Motorola
Guenael Strutt, Motorola

5. When do you send a RREP? (new)
Month Year
doc.: IEEE /1800r0
November 2006
When do you send a RREP? (new)
The new document specifies
Case A: Original transmission
Case B: Re-transmission (forwarding)
Case C: Intermediate reply
That’s it!
Guenael Strutt, Motorola
Guenael Strutt, Motorola

6. Comparison of both documents
Month Year
doc.: IEEE /1800r0
November 2006
Comparison of both documents
Clause 11A.4 in D0.04
Clause 11A.4 in r1
It contains a lot of redundant text
It describes routing from a causal point of view
It contains contradictions
The specification is packet-centric
It avoids redundant text
It describes routing from a behavioral point of view
It is designed not to contain contradictions
The specification is device centric
Compliance testing is greatly facilitated
Guenael Strutt, Motorola
Guenael Strutt, Motorola

7. What has not changed? HWMP is still
Month Year
doc.: IEEE /1800r0
November 2006
What has not changed?
HWMP is still
A hybrid routing protocol, with a reactive component based on AODV and a tree-based proactive component
Using four routing primitives: RREQ, RREP, RERR, RANN
HWMP still fits nicely within the extensible routing framework
HWMP still makes efficient use of the airtime metric
Guenael Strutt, Motorola
Guenael Strutt, Motorola

8. Month Year
doc.: IEEE /1800r0
November 2006
Motion
Move to accept the resolution described in 06/1778r1 and instruct the editor to replace clause 11A.4 in draft D0.04
Moved by:
Second:
Vote: ☺ / ☹ / ?
Guenael Strutt, Motorola
Guenael Strutt, Motorola

9. References HWMP Overview 11-06-1110r1 HWMP Specification 11-06-1778r1
Month Year
doc.: IEEE /1800r0
November 2006
References
HWMP Overview r1
HWMP Specification r1
“Hybrid Wireless Routing Protocol” D0.04 Clause 11A.4
Guenael Strutt, Motorola
Guenael Strutt, Motorola