November 2009

Kazuyuki Sakoda, Sony Corporation

Slide 1

doc.: IEEE 802.11-09/1143r0

Submission

Potential confusion in D3.04Date: 2009-11-11

Authors:Name Affiliations Address Phone email Kazuyuki Sakoda Sony

Corporation 5-1-12 Kitashinagawa Shinagawa-ku, Tokyo 141-0001, Japan

+81-3-5448-4017

sako (at) wcs.sony.co.jp

November 2009

Kazuyuki Sakoda, Sony Corporation

Slide 2

doc.: IEEE 802.11-09/1143r0

Submission

Abstract

• Mesh access point and mesh portal definition– What is written in D3.04– What is the problem– Suggested changes

• Mesh BSS over multiple channels– What is written in D3.04– What is the problem– Suggested changes

November 2009

Kazuyuki Sakoda, Sony Corporation

Slide 3

doc.: IEEE 802.11-09/1143r0

Submission

Mesh access point and mesh portal definition

• What is written in D3.04:– 3.s4 mesh access point: A mesh station (STA) that is collocated with one

or more access point(s).– 3.s14 mesh portal: A mesh station (STA) that is collocated with one or

more portal(s).

• “mesh access point” and “mesh portal” are “mesh STA”.

November 2009

Kazuyuki Sakoda, Sony Corporation

Slide 4

doc.: IEEE 802.11-09/1143r0

Submission

Mesh access point and mesh portal definition

• What is the problem?– Mesh access point sounds like one type of “access point”, rather than mesh

STA.– Mesh portal sounds like one type of “portal”, rather than mesh STA.

Mesh AP(mesh STA) Access point

A wireless LAN device

Mesh BSS Infrastructure BSS

Let us consider “mesh STA”+”AP” type of WLAN device…

November 2009

Kazuyuki Sakoda, Sony Corporation

Slide 5

doc.: IEEE 802.11-09/1143r0

Submission

Mesh access point and mesh portal definition

• What is the problem? (Cont’d)– Mesh access point should be something like “nickname” for the device.

(not a formal logical entity for a type of mesh STA)– Define a new nickname for this entity, or state “mesh STA collocated with

AP”.

Mesh AP(mesh STA) Access point

A wireless LAN device

Mesh BSS Infrastructure BSS

“Mesh access point” should be this guy.

We should put other name, or simply state “mesh STA collocated with AP”

November 2009

Kazuyuki Sakoda, Sony Corporation

Slide 6

doc.: IEEE 802.11-09/1143r0

Submission

Mesh access point and mesh portal definition

• Suggested changes:– Change the definition of mesh access point to read “A type of device that

contains both mesh STA and access point and bridges the traffic between mesh BSS and infrastructure BSS”

– Change the references to mesh access point to be “mesh STA collocated with AP”

mesh STA collocated

with APAccess point

Mesh access point

Mesh BSS Infrastructure BSS

November 2009

Kazuyuki Sakoda, Sony Corporation

Slide 7

doc.: IEEE 802.11-09/1143r0

Submission

Mesh access point and mesh portal definition

• Suggested changes:– Change the definition of mesh portal to read “A type of device that contains

both mesh STA and portal”– Change the references to mesh portal to be “mesh STA collocated with

portal”

mesh STA collocated with portal

PortalMesh BSS non-IEEE-802.11 LAN

Mesh portal

November 2009

Kazuyuki Sakoda, Sony Corporation

Slide 8

doc.: IEEE 802.11-09/1143r0

Submission

Mesh BSS over multiple channels

• What is written in D3.04:– In D3.0, Annex V.1. (Overview of Unified Channel Graphs)

describes how a single mesh BSS can be operated over multiple channels.

– In D3.04, previous Annex V.1 is removed, and there is no description regarding the mesh BSS operation over multiple channels at all.

• What is the problem:– Readers may make misunderstanding that TGs solution does not

support operation over multiple channels.– TGs will receive comments on this in the future ballot.

November 2009

Kazuyuki Sakoda, Sony Corporation

Slide 9

doc.: IEEE 802.11-09/1143r0

Submission

Mesh BSS over multiple channels

• Suggested changes:– Retrieve the previous Annex V.1. (Overview of Unified Channel

Graphs) in D3.0 with refinement.The original text contains some confusing description.

– Change the resolutions to some of the comments closed previously relating to Annex V.1. in D3.0.

November 2009

Kazuyuki Sakoda, Sony Corporation

Slide 10

doc.: IEEE 802.11-09/1143r0

Submission

Backup

• Definitions:– 3.110 portal: The logical point at which the integration service is provided.

– 3.72 integration service: The service that enables delivery of medium access control (MAC) service data units (MSDUs) between the distribution system (DS) and a non-IEEE-802.11 local area network (LAN) (via a portal).

– 3.40 distribution system (DS): A system used to interconnect a set of basic service sets (BSSs) and integrated local area networks (LANs) to create an extended service set (ESS).