MDA Enhancements Date: 2008-05-12 Authors: May 2008 Month Year doc.: IEEE 802.11-yy/xxxxr0 May 2008 MDA Enhancements Date: 2008-05-12 Authors: Kneckt, Nokia. John Doe, Some Company

Month Year doc.: IEEE 802.11-yy/xxxxr0 May 2008 Abstract The presentation describes the required changes for MDA to make it work together with power save mechanisms presented in 802.11s D2.0. Kneckt, Nokia. John Doe, Some Company

Problem statement: MDA and power save Month Year doc.: IEEE 802.11-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

Month Year doc.: IEEE 802.11-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

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

Preconditions for using MDA Month Year doc.: IEEE 802.11-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

How MDA usage is informed Month Year doc.: IEEE 802.11-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

Peer Service Period use in MDAOP Month Year doc.: IEEE 802.11-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

Peer service period termination Month Year doc.: IEEE 802.11-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