1. Submission Title: [IEEE 802.15.5 WPAN Mesh – Technical Discussion]
May, 2007
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [IEEE WPAN Mesh – Technical Discussion]
Date Submitted: [May 14, 2007]
Source: [Chunhui Zhu] Company [Samsung]
Address [75 W Plumeria Dr. San Jose, CA 95134]
Voice:[ ], FAX: [ ],
Re: []
Abstract: [This is for the discussion on low rate WPAN mesh.]
Purpose: [for discussion and reference]
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.
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Chunhui Zhu / Samsung

2. Low Rate WPAN Mesh Discussion
May, 2007
Low Rate WPAN Mesh Discussion
Chunhui (Allan) Zhu
May 14th, 2007
Samsung Electronics
Chunhui Zhu / Samsung

3. Outline Reference model Using link quality as routing matrix
May, 2007
Outline
Reference model
Using link quality as routing matrix
IEEE (4b) Impact
New Feature Development
MIB attributes – range and default value
Chunhui Zhu / Samsung

4. May, 2007
The 15.5 LR Reference Model
So far we agree to insert the mesh sub-layer between the SSCS and the MAC and keep the interface between the SSCS and the mesh identical to the interface between Mesh and the MAC.
The good thing for this approach is to allow applications developed for the 15.4/4b to work with 15.5 without modifying the applications. In other words, the same primitives are used for both one-hop and multi-hop transmissions.
The bad thing is it has already caused confusions to the implementers.
Suggestion:
Seek expert opinions from working group.
Chunhui Zhu / Samsung

5. Using link quality as routing matrix
May, 2007
Using link quality as routing matrix
A 4-bit field is used to describe link cost (16 levels)
It is currently used only for selecting a reliable parent to join; only those with link cost <7 is eligible for being chosen as a parent.
It is not used for routing.
when link quality is used for routing it will generate some impact on the spec, i.e. the routing criteria will be different.
Action item:
Determine the change to the routing algorithm when link quality is used as routing matrix.
Chunhui Zhu / Samsung

6. May, 2007
IEEE (4b) Impact
We need 4b spec to check out the new PHY channels and the multicast support.
For example, 4b uses the 5 MSBs to indicate channel pages (0,1,2) to support PSSS (10 channel) and O-OPSK (10 channel) in 915 MHz band. Do we need to reflect this change? If not, we can’t claim we support 4b.
Action Item:
If possible, please ask 4b people for a spec. What I have is D2 which is obsolete.
Chunhui Zhu / Samsung

7. New Feature Development
May, 2007
New Feature Development
Portability/Mobility
ETRI and CUNY?
Low Power Mesh/End Device
ETRI?
Action item:
Check the status.
Chunhui Zhu / Samsung

8. MIB attributes – range and default value
May, 2007
MIB attributes – range and default value
MIB attributes need to have data range and default values
For some of them I can only guess the value. If someone have better idea on the proper values please feedback to us.
Action item:
Feedback data range and default values.
Chunhui Zhu / Samsung