1. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Eaton Proposal for IEEE Improvements]
Date Submitted: [15 Mar, 2004]
Source: [Marco Naeve and Jose A. Gutierrez, ] Company [Eaton Corporation]
Address [4201 North 27th Street, Milwaukee, WI 53216, USA]
Voice:[ ], FAX: [ ], ,
Re: [ Meeting minutes from bi-weekly conference call on 02/09/2004 ]
Abstract: [This document proposes improvements to the current IEEE MAC sub-layer.]
Purpose: [For discussion within the IEEE study group 4b.]
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
Jose Gutierrez and Marco Naeve, Eaton Corp.
<author>, <company>

2. Eaton Proposal for IEEE 802.15.4 Improvements
Eaton Proposal for IEEE Improvements
Jose Gutierrez and Marco Naeve
Jose Gutierrez and Marco Naeve, Eaton Corp.

3. Association in non-beacon networks. Active scan GTS
Content
Association in non-beacon networks.
Active scan
GTS
Duplicate frame detection
Missing status enumeration
Jose Gutierrez and Marco Naeve, Eaton Corp.

4. Procedure for associating in beacon networks
Procedure for associating in beacon networks
Standard requires that association response command frame is sent indirectly.
Jose Gutierrez and Marco Naeve, Eaton Corp.

5. Procedure for associating in non-beacon networks
Procedure for associating in non-beacon networks
Standard requires that association response command frame is sent indirectly.
Jose Gutierrez and Marco Naeve, Eaton Corp.

6. aResponseWaitTime calculation
aResponseWaitTime calculation
aResponseWaitTime = 32 * aBaseSuperframeDuration
aBaseSuperframeDuration = aBaseSlotDuration * aNumSuperframeSlots
aBaseSlotDuration = 60 symbols
aNumSuperframeSlots = 16
= 30,720 symbols
Jose Gutierrez and Marco Naeve, Eaton Corp.

7. Proposed recommendation
Proposed recommendation
Allow association response frame to be sent directly in non-beacon networks. (Reduce complexity)
Alternatively make aResponseWaitTime a variable allowing implementer programmability.
Jose Gutierrez and Marco Naeve, Eaton Corp.

8. Active scan procedure Returned status parameter values include:
Active scan procedure
Returned status parameter values include:
SUCCESS
NO_BEACON
INVALID_PARAMETER
Jose Gutierrez and Marco Naeve, Eaton Corp.

9. Active scan procedure (what if…)
Active scan procedure (what if…)
PHY operates in the 868MHz band, or MAC was instructed to scan a single channel.
Beacon request command can not be sent due to busy channel.
Add CHANNEL_ACCESS_FAILURE as valid status to the MLME-SCAN.confirm primitive
Jose Gutierrez and Marco Naeve, Eaton Corp.

10. Guaranteed time slot (GTS) mechanism
Guaranteed time slot (GTS) mechanism
Intended usage: HMI, such as mice, keyboard, and joystick.
Pat Kinney proposed to make support for GTS optional (see /286r0)
Eaton supported Pat’s proposal
Jose Gutierrez and Marco Naeve, Eaton Corp.

11. Industrial applications
Industrial applications
Today
Tomorrow
Event-based monitoring
Low periodicity monitoring.
Non-safety critical control
Time based
Constant data stream
Jose Gutierrez and Marco Naeve, Eaton Corp.

12. Keep GTS but make it optional!
GTS advantages
Facilitates systems with “hard real-time” requirements.
Provides a deterministic communication mechanism.
Provides a channel for constant data stream (low volume).
Keep GTS but make it optional!
Jose Gutierrez and Marco Naeve, Eaton Corp.

13. Duplicate frame detection
Duplicate frame detection
Function currently not provided by MAC
Easy to add this feature
Sequence number already part of frame (MAC frames do not need to be changed)
Jose Gutierrez and Marco Naeve, Eaton Corp.

14. Proposed recommendation
Proposed recommendation
Add duplicate frame detection to the MAC sub-layer.
Alternatively pass the data sequence number (DSN) up to the higher layer for duplicate detection.
Jose Gutierrez and Marco Naeve, Eaton Corp.

15. Missing status enumeration
Missing status enumeration
Comment Type: Errata
Comment: When a MAC sub-layer issues a PD-DATA.request but the transceiver is already busy transmitting, the PD-DATA.confirm need to be able to indicate this status.
Solution: Add BUSY_TX as valid status to the PD-DATA.confirm primitive.
Jose Gutierrez and Marco Naeve, Eaton Corp.

16.
PHY Simplification
Simplify stack implementations on small microprocessors.
Jose Gutierrez and Marco Naeve, Eaton Corp.

17.
PHY Simplification
Remove BUSY_RX, BUSY_TX, and FORCE_TRX_OFF from the PHY and instead allow it to be implementation specific.
Jose Gutierrez and Marco Naeve, Eaton Corp.