1. Channel Switch Announcement with Extension
Novemeber 2006
doc.: IEEE /1700r0
November 2006
Channel Switch Announcement with Extension
Date:
Authors:
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Qi Wang (Broadcom)
Qi Wang, Broadcom

2. Novemeber 2006
doc.: IEEE /1700r0
November 2006
Abstract
This presentation is in line with the text proposal in /1701r0
Address the inclusion of the “secondary channel offset” and the “new regulatory class” information in a CSA frame
Propose an alternative to solutions defined in TGv D0.05 draft and TGn D1.06 draft
Qi Wang (Broadcom)
Qi Wang, Broadcom

3. Current TGv approach to Indicate New Regulatory Class
November 2006
Current TGv approach to Indicate New Regulatory Class
A new CSA IE/frame is defined
One additional field to the existing CSA IE/frame
Depending on whether a channel switch results in a switch of the regulatory class, either the existing or the new CSA IE/frame is used.
Element ID
Length
Channel Switch Mode
New Regulatory Class
New Channel Number
Channel Switch Count
Octets: 1
Figure v82—Extended Channel Switch Announcement information element
Qi Wang (Broadcom)

4. Current TGn approach to Indicate Secondary Channel Offset
November 2006
Current TGn approach to Indicate Secondary Channel Offset
A new “Secondary Channel Offset” IE is defined
Append the new IE to the existing CSA frame body when necessary
Qi Wang (Broadcom)

5. Problems with Current Approach
November 2006
Problems with Current Approach
Does not scale
Multiple new CSA IE/frames need to be defined
Problem worsens when additional information needed to be included in CSA
Qi Wang (Broadcom)

6. November 2006
Proposed Alternative
Define a variable-length Extended Channel Switch Announcement IE
Secondary Channel Offset field
New Regulatory Class field
HT STA
Non HT STA
11v STA
Non 11v STA
New Reg. Class
No Change
Follow TGn D1.06 setting
See Regulatory Class index in Annex J
Qi Wang (Broadcom)

7. Proposed Alternative – cont’d
November 2006
Proposed Alternative – cont’d
Append the new IE to the existing CSA frame body when necessary
New IE present when information in one or more fields is relevant for a channel switch;
New IE optionally present or absent otherwise.
Qi Wang (Broadcom)

8. Advantages of the Proposal
November 2006
Advantages of the Proposal
Reduces the number of new CSA-related IEs
Accommodates both the present and potential future addition of information in a CSA frame
Eliminate the needs to define multiple CSA frames
Simplify implementation
Qi Wang (Broadcom)

9. References IEEE P802.11v/D0.05 draft IEEE P802.11n/D1.06 draft
November 2006
References
IEEE P802.11v/D0.05 draft
IEEE P802.11n/D1.06 draft
IEEE P REVma/D8.0 draft
Qi Wang (Broadcom)

10. Motion for TGv Requested Motion:
November 2006
Motion for TGv
Requested Motion:
Include the text proposal in document “ v-text-proposal.doc” into TGv draft.
Accept:
Reject:
Abstain:
Qi Wang (Broadcom)

11. Motion for TGn Requested Motion:
November 2006
Motion for TGn
Requested Motion:
Include the text proposal in document “ v-text-proposal.doc” into TGn draft.
Accept:
Reject:
Abstain:
Qi Wang (Broadcom)