Proposed Modifications in TGh Draft Proposal March 2002 doc.: IEEE 802.11-02/216r0A March 2002 Proposed Modifications in TGh Draft Proposal Amjad Soomro amjad.soomro@philips.com Amjad Soomro, Philips Amjad Soomro, Philips

Introduction Current Mechanism Issues Proposed Changes Conclusions March 2002 Introduction Current Mechanism Issues Proposed Changes Conclusions Amjad Soomro, Philips

The Current Mechanism Channel Switch Announcement Element March 2002 The Current Mechanism Channel Switch Announcement Element Switch Immediately Do channel switch later STA implementation specific MIB attributes included to quiet the channel after sometime Amjad Soomro, Philips

March 2002 The Issue AP may desire to do channel switch later, however, regulators may require it to stop transmissions immediately. The only possible way now is to do switch immediately. Create potential issue of several STAs not hearing this announcement. Amjad Soomro, Philips

March 2002 The Proposed Solution Modify the current Channel Switch Announcement Element as: Add field: Switch Mode Element ID (1 octet) Length (1 octets) New Channel Number (1 octet) Channel Switch Count (2 octets) Mode (1 octet) Q Reserved bit 0 1 2 3 4 5 6 7 Amjad Soomro, Philips

Bit Field Interpretations March 2002 Bit Field Interpretations Q: Quiet Mode When this bit is set, all STAs receiving this frame in the BSS shall immediately stop transmitting in the current channel. Amjad Soomro, Philips

March 2002 2 - Current Basic Report Basic, Foreign PLCP Header, Unknown, Primary User, Unmeasured. In performing new channel selection additional channel loading information would avoid potential pitfalls Amjad Soomro, Philips

Add Measurement ID CCA Request Definition Measurement ID = 1 March 2002 Add Measurement ID CCA Request Measurement ID = 1 Definition If CCA Report was requested in the Measurement Request, the CCA Busy Fraction Measurement report is reported back, if supported. It is calculated as CCA Busy Fraction = Ceiling (255 ´ [CCA Busy Period] / [Total Measurement Duration]) Amjad Soomro, Philips

Add Measurement ID Simple to implement Optional to include March 2002 Amjad Soomro, Philips

Conclusions A simple enhancement to current proposal is proposed March 2002 Conclusions A simple enhancement to current proposal is proposed No significant added complexity Need for regulatory requirements. Amjad Soomro, Philips