Doc: IEEE Submission November 2013 Hernandez,Li,Dotlić,Miura (NICT)Slide 1 Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [ Addressing coexistence PAC devices with devices ] Date Submitted: [ November 2013 ] Source: [Marco Hernandez, Huan-Bang Li, Igor Dotlić, Ryu Miura ] Company: [NICT] Address: [3-4 Hikarino-oka, Yokosuka, , Japan] Voice:[ ] Fax: [ ] [] Re: [In response to call for technical guidance document contributions TG8] Abstract:[ ] Purpose:[Material for discussion in TG] Notice:This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release:The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P

Doc: IEEE Submission Channelization for 11ac November 2013 Hernandez,Li,Dotlić,Miura (NICT)Slide 2

Doc: IEEE Submission Channelization for 11ac November 2013 Hernandez,Li,Dotlić,Miura (NICT)Slide ac devices support 80 MHz channels with 20 MHz and 40 MHz for legacy (backward compatibility) to n devices, and optionally 160 MHz channels. The presence of primary 20 MHz sub-channels is necessary to guarantee coexistence with legacy n devices.

Doc: IEEE Submission Channelization for 11ac November 2013 Hernandez,Li,Dotlić,Miura (NICT)Slide 4 Example: two 80 MHz ac APs select the same 80 MHz channel bandwidth but one AP puts its primary 20 MHz channel within the lower 40 MHz and the other AP puts its primary 20 MHz channel within the upper 40 MHz. What this means is that n clients associated to the first AP can transmit 20 or 40 MHz as usual, at the same time as n clients associated to the second AP can transmit 20 or 40 MHz in parallel. What is new in ac is the ability for any ac client that sees that the whole 80 MHz as available to invoke a very high-speed mode and to transmit across the whole 80 MHz.

Doc: IEEE Submission Channelization for 11ac The presence of primary 20 MHz sub-channels guarantees coexistence with legacy n devices. Coexistence in this case means backward compatibility with n devices or concurrent operation of ac devices and n devices (with low probability of interference of course). November 2013 Hernandez,Li,Dotlić,Miura (NICT)Slide 5

Doc: IEEE Submission Coexistence with 11 devices PAC devices cannot distinguish 11a,b,g,n,ac devices, because the PAC PHYs are different. By choosing 20 MHz channels for PAC devices, it does not guarantee coexistence because the PHYs of n and ac devices do not talk with PAC radios n or ac devices may be using 40 MHz, 80 MHz or 160 MHz channels. 20 MHz channels for PAC devices, it does not guarantee coexistence either. In terms of coexistence, PAC devices may use distributed power control to ensure coexistence with Wi-Fi devices. November 2013 Hernandez,Li,Dotlić,Miura (NICT)Slide 6