1. Name - WirelessHD March 2010
doc.: IEEE /XXXr0
Sep 19, 2007
March 2010
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)‏
Submission Title: [Multi-PHY-Mode Management g 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, , Japan]
Voice: [ ], FAX: [ ],
Re: []
Abstract: [Proposal for Multi-PHY Mode Management]
Purpose: [This document provides a list of the editing staff that will be working on g.]
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
C.S. Sum
Name - WirelessHD

2. 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
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3. 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
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4. 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

5. 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
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6. 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
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7. TG4g MPM Management Scheme ~Common Signaling Mode~
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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
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8. 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
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9. 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
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10. 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
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