1. CID#102 - Channel Allocation
Month Year
Month Year
doc.: IEEE yy/xxxxr0
doc.: IEEE yy/xxxxr0
January 2008
CID#102 - Channel Allocation
Authors:
Date:
Slide 1
Emily Qi (Intel Corp) et al
Page 1
Emily Qi
John Doe, Some Company

2. Month Year
Month Year
doc.: IEEE yy/xxxxr0
doc.: IEEE yy/xxxxr0
January 2008
Abstract
This document provides an outline for channel allocation normative text proposal (08/0048r1) in support of the channel/frequency allocation for non infrastructure networking (IBSS, Mesh, Bluetooth, etc...) or other uses.
This presentation provides comment resolution for LB108 CID #102.
Slide 2
Emily Qi (Intel Corp) et al
Page 2
Emily Qi
John Doe, Some Company

3. Agenda Motivation Proposed Solution Protocol Details
January 2008
Agenda
Motivation
Proposed Solution
Protocol Details
Review the normative text, see 08/0048r1
Slide 3
Emily Qi (Intel Corp) et al

4. January 2008
Motivation
In general, a non infrastructure network (e.g. IBSS, one-hop Mesh, or Bluetooth) can co-exist with an infrastructure network
The channel/frequency number that is selected by a non infrastructure network is critical to the overall WiFi network performance
Guidance from the infrastructure on channel/frequency allocation for non infrastructure network can facilitate better network coexistence and improve overall network performance:
Coordinated channel planning
Reduce radio interference
Balance traffic load
Slide 4
Emily Qi (Intel Corp) et al

5. Usage Scenario: IBSS or one-hop Mesh
January 2008
Usage Scenario: IBSS or one-hop Mesh
Without the guidance from infrastructure, a non-AP STA may choose a non-ideal channel to start an IBSS or a mesh network
Operation of the IBSS or the mesh network can interfere with the operation of infrastructure network
Wired Infrastructure
Channel 1 AP
BSS = Basic Service Set
Channel 11 AP
STA
STA
STA
STA
STA
STA
STA
IBSS or Mesh
STA
STA
Emily Qi (Intel Corp) et al

6. Usage scenario: Bluetooth
January 2008
Usage scenario: Bluetooth
Before
Channel 1 AP
Problem: BT can interfere with channels in use
With guidance from the infrastructure it is possible to instruct the STA to use “safer” frequencies for use by BT. BT
Frequency
802.11 BT
Headset
Dual Mode STA
Channel/Frequency Separation
After
Channel 1 AP BT
Frequency
802.11 BT
Headset
Dual Mode STA
Emily Qi (Intel Corp) et al

7. Proposed Solution Introducing Channel Allocation IE
January 2008
Proposed Solution
Introducing Channel Allocation IE
Provide recommended channel/frequency lists for different use cases
Allow flexibility for multiple applications and extensibility for future use cases
Non-AP STA can request channel allocation information with or without having to associate to the infrastructure network
Upon the receipt of the Channel Allocation information, Non-AP STA should operate the corresponding network at the recommended channel/frequency lists.
AP provides Channel Allocation information to the STA
The AP provides a frequency list that either IT recommended or the network infrastructure examined based on the interference level, traffic load or supported regulatory classes.
Slide 7
Emily Qi (Intel Corp) et al

8. Channel Allocation: Request and Response
January 2008
Channel Allocation: Request and Response
Define a capability bit in the Extended Capability IE: Channel Allocation
Non-AP STA or AP can request or respond Channel Allocation information via Probe Request and Response frames
Allow unassociated STA to request Channel Allocation information before initiating a non infrasture network
Non-AP STA or AP can request or respond Channel Allocation information via the Channel Allocation Request and Response frames – Public Action frame
Allow associated STA to request Channel Allocation information in a protected manner
Allow AP to update Channel Allocation information for both associated and unassociated STAs
Slide 8
Emily Qi (Intel Corp) et al

9. Channel Allocation information
Month Year
doc.: IEEE yy/xxxxr0
January 2008
Channel Allocation information
Channel Allocation IE format :
Element ID
Length
One or more Sub-elements
Octets: 1
Variable
Channel Allocation sub-element types and usages
Sub-element ID
Sub-element Type (Usages)
Non-infrastructure 1
Bluetooth 2
Zigbee 3
CSS
254
Unspecified Network
4-253, 255
Reserved
One or more sub-elements to indicate channel/frequency numbers allocated for the corresponding use cases specified in the Sub-element ID field
Sub-element ID is the only field included in the sub-element if the Channel Allocation IE is included in the request frames.
Additional sub-element can be defined when more use cases are discovered
Emily Qi (Intel Corp) et al
Emily Qi

10. Examples of Channel Allocation Sub-elements
Month Year
doc.: IEEE yy/xxxxr0
January 2008
Examples of Channel Allocation Sub-elements
Non-infrastructure Sub-element:
Sub-element ID (0)
Length
(2n)
<Regulatory class, Channel number> duplet List
Octets: 1
2*n
Bluetooth Sub-element:
Sub-element ID (1)
Length
(2n)
<Lower hopping Freq#, Upper hopping Freq# > duplet List
Octets: 1
2*n
Zigbee Sub-element:
Sub-element ID (2)
Length
(n)
Channel List
Octets: 1 n
Emily Qi (Intel Corp) et al
Emily Qi

11. Channel Allocation Request/Response frames
Month Year
doc.: IEEE yy/xxxxr0
January 2008
Channel Allocation Request/Response frames
Channel Allocation Request:
Category
Action
Dialog Token
Request Reason
Channel Allocation Element
Supported Regulatory Element
Octets: 1
variable
Channel Allocation Response:
Category
Action
Dialog Token
Channel Allocation Element
Octets: 1
variable
AP can send a Channel Response frame in response to the Channel Allocation Request frame , or AP can also send an unsolicited Channel Allocation Response when AP needs to update Channel Allocation Information
Emily Qi (Intel Corp) et al
Slide 11
Emily Qi

12. Thank You! and Questions?
Month Year
doc.: IEEE yy/xxxxr0
January 2008
Thank You! and Questions?
Slide 12
Emily Qi (Intel Corp) et al
Emily Qi