1. MDA Enhancements Date: 2008-05-12 Authors: May 2008 Month Year
doc.: IEEE yy/xxxxr0
May 2008
MDA Enhancements
Date:
Authors:
Kneckt, Nokia.
John Doe, Some Company

2. Month Year
doc.: IEEE yy/xxxxr0
May 2008
Abstract
The presentation describes the required changes for MDA to make it work together with power save mechanisms presented in s D2.0.
Kneckt, Nokia.
John Doe, Some Company

3. Problem statement: MDA and power save
Month Year
doc.: IEEE yy/xxxxr0
May 2008
Problem statement: MDA and power save
MDA and power save features have been independently developed
A combined approach offers several advantages:
Target for improved MDA
MDA enables real time (high AC) data transmission between two (power saving) MPs
MDA reservation mechanisms improve data transmission efficiency which reduces power consumption
The requirements for improved MDA
Power saving MPs needs to minimize media listening. The media listening consumes power
The MP that proposes or accepts new MDA reservation should have understanding of the existing MDA reservations in the neighborhood
Kneckt, Nokia.
John Doe, Some Company

4. Month Year
doc.: IEEE yy/xxxxr0
May 2008
Modified items
The compatibility of power save and MDA is achieved through defining rules for
Collecting information of the existing MDA reservations before starting to use MDA
Informing other (power saving) MPs on the MDA usage
Operation during the MDAOP, Peer Service Period utilization with MDA
Kneckt, Nokia.
John Doe, Some Company

5. Phases in MDA use May 2008 Month Year doc.: IEEE 802.11-yy/xxxxr0
Triggers to changes MDA phases
MP decides to start MDA use
MP fulfills conditions to start MDA use.
MP sets MDA enabled bit
MP decides to end MDA use
Time
Operation in
local MP
Idle
Collects information of MDA utilization in neighborhood
May inform neighborhood of the start of the MDA use
MDA in use
MP may make and accept MDA reservations
MP periodically wakes up to receive neighboring MPs’ MDA announcements
Idle
Time
Phase duration and estimated power consumption due MDA use
No duration limitation
No power consumption due to MDA
Operation in phase max 1-2 seconds
Due to MDA MP operates in awake state.
No duration limitation
Reception of a neighbor MPs’ MDA announcements
1 announcement per 1 second per 1 neighbor MP
No duration limitation
No power consumption due to MDA
Kneckt, Nokia.
John Doe, Some Company

6. Preconditions for using MDA
Month Year
doc.: IEEE yy/xxxxr0
May 2008
Preconditions for using MDA
An MP is MDA capable
An MP has set MDA enabled bit
An MP may set MDA Enabled bit, if it is aware of neighboring MPs’ MDA reservations and reported TX-RX times
A MP is considered to be aware of neighboring MPs’ MDA reservations after listening media 1-2 seconds
An MP has informed its change to MDA enabled mode
MDA enabled non-peer MPs operating in power save mode
MDA enabled peer MPs operating in deep sleep
After MDA Enabled bit is set, the MP may make and accept MDA reservations
Kneckt, Nokia.
John Doe, Some Company

7. How MDA usage is informed
Month Year
doc.: IEEE yy/xxxxr0
May 2008
How MDA usage is informed
An MP sends unicast notify message containing information of the beacon transmission times and that MDA is used or will be used soon
The notify frames may be transmitted during the scanning of MDA reservations in the neighborhood
MDA Enabled MPs shall monitor MDA announcements in order to maintain MDA utilization information
Kneckt, Nokia.
John Doe, Some Company

8. Peer Service Period use in MDAOP
Month Year
doc.: IEEE yy/xxxxr0
May 2008
Peer Service Period use in MDAOP
A peer service period is triggered at the MDAOP start time, if the receiver MP in MDAOP operates light or deep sleep power management mode for the transmitter MP in MDAOP
The MDAOP transmitter is the transmitter in triggered peer service period
The MDAOP receiver is the receiver in triggered peer service period
No peer service period is triggered, if the receiver MP in MDAOP operates in active mode for the transmitter MP
Kneckt, Nokia.
John Doe, Some Company

9. Peer service period termination
Month Year
doc.: IEEE yy/xxxxr0
May 2008
Peer service period termination
The peer service period continues until it is successfully terminated by acknowledged null or data frame with set EOSP bit from transmitter to receiver
The peer service period is needed to enable the receiver to know when it may return to doze state
The peer service period may be terminated after the MDAOP
Kneckt, Nokia.
John Doe, Some Company