Name - WirelessHD March 2010 doc.: IEEE 802.11-00/XXXr0 Sep 19, 2007 March 2010 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)‏ Submission Title: [Multi-PHY-Mode Management 802.15.4g WPAN System – MAC/PHY Collaboration] Date Submitted: [16 March 2010] Source: [C.S. Sum, H. Harada, F. Kojima, R. Funada, Z. Lan] Company [NICT] Address [3-4, Hikarino-oka, Yokosuka, 239-0847, Japan] Voice: [+81-46-847-5092], FAX: [+81-46-847-5440], E-Mail: [sum@nict.go.jp] Re: [] Abstract: [Proposal for Multi-PHY Mode Management] Purpose: [This document provides a list of the editing staff that will be working on 802.15.4g.] Notice: This document has been prepared to assist the IEEE P802.15. 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 P802.15. C.S. Sum Name - WirelessHD

March 2010 High Level Summary This presentation provides the overview of the mechanism specified for coexistence among multiple PHY layer design in the TG4g system This presentation highlights the corresponding MAC changes in the proposal This presentation intends to facilitate discussions to bridge the collaboration between PHY and MAC specifications regarding the multi-PHY- mode coexistence topic C.S. Sum

Abbreviations MPM - Multi-PHY-Mode NC – network coordinator March 2010 Abbreviations MPM - Multi-PHY-Mode NC – network coordinator CB – Coexistence beacon Common Signaling Mode – CSM C.S. Sum

Presentation Outline TG4g MPM Management Scheme – Motivation March 2010 Presentation Outline TG4g MPM Management Scheme – Motivation TG4g MPM Management Scheme – How It Works TG4g MPM Management Scheme – Common Signaling Mode Required MAC Changes Proposed Future Collaborations C.S. Sum

TG4g MPM Management Scheme ~Motivation~ March 2010 TG4g MPM Management Scheme ~Motivation~ There are a total of three PHY layer designs specified in the TG4g: FSK, OFDM and OQPSK If multiple networks with respective PHY modes are co-located, co-channel interference will occur A mechanism that facilitates the coexistence of multiple PHY modes have to be specified C.S. Sum

TG4g MPM Management Scheme ~How It Works~ March 2010 TG4g MPM Management Scheme ~How It Works~ Step 0: For cross-PHY communication to take place, a common PHY language shall be specified Step 1: Before starting a network in a channel, an NC shall scan for a CB Step 1.1: Upon receiving CB, the NC shall not use the channel, or achieve synchronization with existing network Step 1.2: If not receiving CB, the NC will start a network the conventional way (e.g. sends beacon etc) Step 2: After occupying the channel, the NC shall send out CB periodically The cycle goes on for new incoming networks Refer 10/043r0 for details C.S. Sum

TG4g MPM Management Scheme ~Common Signaling Mode~ March 2010 TG4g MPM Management Scheme ~Common Signaling Mode~ Only NCs are required to support the CSM, optional for other devices Since CB is the common platform to bridge negotiation among NCs with different PHY modes, it has to be recognizable by these NCs A common PHY specification is specified to send the CB, namely the Common Signaling Mode (CSM) All NCs are able send the CB employing the CSM All NCs are able scan the CB sent in the CSM For implementers seeking to employ multiple PHYs in one system, CMS needs to be used C.S. Sum

Required MAC Changes Adding a Coexistence-beacon (CB) March 2010 Required MAC Changes Adding a Coexistence-beacon (CB) In short, the CB is a beacon to facilitate discovery among networks with different PHY modes The CB is functionally similar to the beacon, with some additional information to facilitate inter-PHY-mode coexistence Corresponding procedural changes Refer 10/090r0 for the details C.S. Sum

Proposed Future Collaborations March 2010 Proposed Future Collaborations Discussion with TG4e Allocation of one frame type value What completed (10/090) The PHY specification for CSM The CB frame format The procedural descriptions Other related modifications C.S. Sum

March 2010 References 10/043r0 – power-point slides of the Multi- PHY-Mode management proposal 10/090r0 – text version of the Multi-PHY- Mode management proposal C.S. Sum