1 / 14

Modifications to Transmit Regulatory Information to Enable Active Scanning

This proposal suggests modifications to enable active scanning in European regulatory domains for 5 GHz bands. It includes transmitting regulatory information in site reports and introducing a new frame for transmitting regulatory information autonomously by APs. This proposal aims to reduce passive scanning times and enable more efficient transmission of regulatory information.

alanostrom
Download Presentation

Modifications to Transmit Regulatory Information to Enable Active Scanning

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Modifications to Transmit RegulatoryInformation to Enable Active Scanning Amjad Soomro Philips Zhun Zhong

  2. European Regulations in 5 GHz Bands • A STA, before transmitting on a channel • Detects radars • Determines maximum transmit power levels • Applies transmit power mitigation, if applicable • STAs are allowed to rely on measurements and ‘Mitigation’ requirements announced by AP Soomro A. and Zhong Z.

  3. Situation • STAs are forced to do passive scanning while roaming in 5GHz bands in European regulatory domains • Similar requirements might become applicable in US in upper 5 GHz bands • Limits on maximum transmit power might be desirable for administrative reasons where regulatory requirements do not exist • Passive scanning may result in wait times of up to one beacon period per scanned channel • 5 GHz bands has at least twelve channels • Many more to be available in future (US) This results in long scan times Soomro A. and Zhong Z.

  4. Proposal 1 • Include regulatory information in Site Report • Enables active scanning • Specifically, include additional four bytes • Maximum Transmit Power Level • Local Power Constraint • Map field (as defined in 802.11h amendment) • Information supplied by neighboring AP’s Soomro A. and Zhong Z.

  5. Proposal 2 • Neighbor Reports may not be always available. • No neighbor information available • APs may choose to not include neighbor information Soomro A. and Zhong Z.

  6. Proposal 2 • Add capability for APs to transmit regulatory information in between beacons • Define new Regulatory Domain Information frame • The frame to be transmitted, autonomously, by an AP in between beacons, zero or more times. Figure 0-6 – Regulatory Domain Information frame body format Figure 1— Regulatory Domain Information Element field format Soomro A. and Zhong Z.

  7. Field Definitions • The definitions for Maximum Transmit Power Level, Local Power Constraint and Map are the same as defined in IEEE 802.11h amendment. Soomro A. and Zhong Z.

  8. Benefits • Beacons have lots of other information • Regulatory Domain Information frame keeps the frame length small • Efficiently announces regulatory domain information, making it easier to transmit it multiple times within a beacon interval • Reduces Passive Scanning Times • By enabling on-demand active scanning • Measurements Results/Information already exists in AP/neighboring APs • No additional measurement burden – just reporting • No hardware changes required Soomro A. and Zhong Z.

  9. Comparison Table for Two Proposals The two proposals are complementary Soomro A. and Zhong Z.

  10. Conclusions • Only passive scanning possible with the current protocol in 5 GHz European bands • The proposal • Enables active scanning • Reduces time spent in passive scanning • Simple additions in the protocol • Without hardware changes Soomro A. and Zhong Z.

  11. Straw Poll 1 Would you support including regulatory information in Neighbor Report to enable active scanning Soomro A. and Zhong Z.

  12. Straw Poll 2 Would you support adding a protocol frame to report regulatory information/measurements Soomro A. and Zhong Z.

  13. Motion 1 • Instruct the editor to incorporate changes submitted in the document 11-04-1011 in the next TGk draft Soomro A. and Zhong Z.

  14. Motion 2 • Instruct the editor to incorporate changes submitted in the document 11-04-1012 in the next TGk draft Soomro A. and Zhong Z.

More Related