Hi Pascal
In the paragraph"The SF may be seen as divided between an upper bandwidth
adaptation logic that is not aware of the particular technology that is used
to obtain and release bandwidth, and an underlying service sublayer that
maps those needs in the actual technology, which means mapping the bandwidth
onto cells in the case of TSCH."
You use two different term to expression the sub-modules of SF, i.e. "logic"
and "sublayer". I propose to consistently use one. I prefer "logic". Then, the
new text will be:
"The SF may be seen as divided between an upper bandwidth adaptation logic
that is not aware of the particular technology that is used to obtain and
release bandwidth, and an underlying service logic that maps those needs in
the actual technology, which means mapping the bandwidth onto cells in the
case of TSCH."
what do you think?
ThanksQin
On Monday, June 6, 2016 12:04 PM, Pascal Thubert (pthubert)
<[email protected]> wrote:
#yiv8570481668 #yiv8570481668 -- _filtered #yiv8570481668 {panose-1:2 4 5 3 5
4 6 3 2 4;} _filtered #yiv8570481668 {font-family:Calibri;panose-1:2 15 5 2 2 2
4 3 2 4;}#yiv8570481668 #yiv8570481668 p.yiv8570481668MsoNormal, #yiv8570481668
li.yiv8570481668MsoNormal, #yiv8570481668 div.yiv8570481668MsoNormal
{margin:0cm;margin-bottom:.0001pt;font-size:12.0pt;}#yiv8570481668 a:link,
#yiv8570481668 span.yiv8570481668MsoHyperlink
{color:blue;text-decoration:underline;}#yiv8570481668 a:visited, #yiv8570481668
span.yiv8570481668MsoHyperlinkFollowed
{color:purple;text-decoration:underline;}#yiv8570481668
span.yiv8570481668hoenzb {}#yiv8570481668 span.yiv8570481668EmailStyle18
{color:#1F497D;}#yiv8570481668 span.yiv8570481668EmailStyle19
{color:windowtext;}#yiv8570481668 .yiv8570481668MsoChpDefault
{font-size:10.0pt;} _filtered #yiv8570481668 {margin:70.85pt 70.85pt 70.85pt
70.85pt;}#yiv8570481668 div.yiv8570481668WordSection1 {}#yiv8570481668 Hello
Xavi: Not sure what you want me to add? At the moment the text reads: “
4.2.2. Scheduling Functions and the 6P protocol In the case of soft
cells, the cell management entity that controls the dynamic attribution of
cells to adapt to the dynamics of variable rate flows is called a Scheduling
Function (SF). There may be multiple SFs with more or less aggressive
reaction to the dynamics of the network. The 6TiSCH 6top Scheduling
Function Zero (SF0) [I-D.ietf-6tisch-6top-sf0] provides a simple scheduling
function that can be used by default by devices that support dynamic
scheduling of soft cells. The SF may be seen as divided between an
upper bandwidth adaptation logic that is not aware of the particular
technology that is used to obtain and release bandwidth, and an underlying
service sublayer that maps those needs in the actual technology, which means
mapping the bandwidth onto cells in the case of TSCH.
+------------------------+ +------------------------+ |
Scheduling Function | | Scheduling Function | | Bandwidth
adaptation | | Bandwidth adaptation |
+------------------------+ +------------------------+ |
Scheduling Function | | Scheduling Function | | TSCH mapping
to cells | | TSCH mapping to cells | +------------------------+
+------------------------+ | 6top cells negotiation | <- 6P -> |
6top cells negotiation | +------------------------+
+------------------------+ Figure 6: SF/6P stack
in 6top The SF relies on 6top services that implement the 6top Protocol
(6P) [I-D.ietf-6tisch-6top-protocol] to negotiate the precise cells that
will be allocated or freed based on the schedules of the peer. It may be
for instance that a peer wants to use a particular time slot that is free in
its schedule, but that timeslot is already in use by the other peer for a
communication with a third party on a different cell. The 6P protocol
enables the peers to find an agreement in a transactional manner that
ensures the final consistency of the nodes state. “ In fact, I realize
I’m not 100% clear what whether people think that SF belongs to 6top or sits
over it as a service user. Part of the confusion is the name of the SF0 draft
“6TiSCH 6top Scheduling Function Zero (SF0)” which tends to indicate that it is
part of it. Take care, Pascal From: [email protected]
[mailto:[email protected]]On Behalf Of Xavier Vilajosana
Sent: samedi 4 juin 2016 06:26
To: Thomas Watteyne <[email protected]>
Cc: Pascal Thubert (pthubert) <[email protected]>; [email protected]
Subject: Re: [6tisch] proposed text to describe SF and 6P in archie Hi
Pascal, Thomas, all inline too (see changes in *foo*) regards, X
2016-06-03 20:41 GMT+02:00 Thomas Watteyne <[email protected]>:
Pascal, Some typos and suggestions below. 4.2.2. Scheduling Functions
and the 6P Protocol (6P) In the case of soft cells, the cell management
entity that controls the dynamic attribution of cells to adapt to *varying*
rate flows *in the network* is called Scheduling Function (SF). There may be
multiple SFs, each implementing a different policy to adapt to varying
network traffic. The 6TiSCH 6top Scheduling Function Zero (SF0)
[I-D.ietf-6tisch-6top-sf0] provides a simple scheduling function that can be
used by default by devices that support dynamic scheduling of soft cells.
The SF is logically divided in a bandwidth adaptation policy which is
*independent* to the particular *mechanism* used to obtain and release
bandwidth, TW> I don't understand the previous sentence and a underlying
service sublayer which identifies
XV> Only identifies? For me we need to stress the difference between 6top
protocol and this sublayer
the appropriate TSCH cells to use. +------------------------+
+------------------------+ | Scheduling Function | |
Scheduling Function | | Bandwidth adaptation | | Bandwidth
adaptation | +------------------------+
+------------------------+ | Scheduling Function | |
Scheduling Function | | TSCH cell mapping | | TSCH cell
mapping | +------------------------+ +------------------------+
| 6top cells negotiation | <- 6P -> | 6top cells negotiation |
+------------------------+ +------------------------+
Figure 6: SF/6P stack in 6top The SF relies on the 6top
Protocol (6P) [I-D.ietf-6tisch-6top-protocol] to negotiate the cells between
neighbor nodes. It may be for instance that a node wants to use a
particular time slot that is free in its schedule, but which is already in
use by its neighbor. The 6P protocol enables the neighbor nodes to find
an agreement on which cells to use.
On Friday, June 3, 2016, Pascal Thubert (pthubert) <[email protected]> wrote:
Dear all:
As discussed at the last Interim, please find proposed text in the 6TiSCH
architecture below.
What do you think?
Pascal
4.2.2. Scheduling Functions and the 6P protocol
In the case of soft cells, the cell management entity that controls
the dynamic attribution of cells to adapt to the dynamics of variable
rate flows is called a Scheduling Function (SF). There may be
multiple SFs with more or less aggressive reaction to the dynamics of
the network. The 6TiSCH 6top Scheduling Function Zero (SF0)
[I-D.ietf-6tisch-6top-sf0] provides a simple scheduling function that
can be used by default by devices that support dynamic scheduling of
soft cells.
The SF is logically divided in an abstract bandwidth adaptation logic
that is abstract to the particular technology used to obtain and
release bandwidth, and a underlying service sublayer that maps those
needs in the actual technology, which means identifying the
appropriate cells in the context of TSCH.
+------------------------+ +------------------------+
| Scheduling Function | | Scheduling Function |
| Bandwidth adaptation | | Bandwidth adaptation |
+------------------------+ +------------------------+
| Scheduling Function | | Scheduling Function |
| TSCH mapping to cells | | TSCH mapping to cells |
+------------------------+ +------------------------+
| 6top cells negotiation | <- 6P -> | 6top cells negotiation |
+------------------------+ +------------------------+
Figure 6: SF/6P stack in 6top
The SF relies on 6top services that implement the 6top Protocol (6P)
[I-D.ietf-6tisch-6top-protocol] to negotiate the precise cells that
will be allocated or freed based on the schedules of the peer. It
may be for instance that a peer wants to use a particular time slot
that is free in its schedule, but that timeslot is already in use by
the other peer for a communication with a third party on a different
cell. The 6P protocol enables the peers to find an agreement in a
transactional manner that ensures the final consistency of the nodes
state.
_______________________________________________
6tisch mailing list
[email protected]
https://www.ietf.org/mailman/listinfo/6tisch
-- _______________________________________ Thomas Watteyne, PhD Research
Scientist & Innovator, Inria Sr Networking Design Eng, Linear Tech Founder &
co-lead, UC Berkeley OpenWSN Co-chair, IETF 6TiSCH www.thomaswatteyne.com
_______________________________________
_______________________________________________
6tisch mailing list
[email protected]
https://www.ietf.org/mailman/listinfo/6tisch
_______________________________________________
6tisch mailing list
[email protected]
https://www.ietf.org/mailman/listinfo/6tisch
_______________________________________________
6tisch mailing list
[email protected]
https://www.ietf.org/mailman/listinfo/6tisch
