1. IEEE 802.21 MEDIA INDEPENDENT HANDOVER
Title: Multi-Radio Power Conservation Management
Date Submitted: January
Presented at IEEE session #30 in Los Angeles
Authors or Source(s): Kevin Knoll, Dennis Edwards, Behcet Sarikaya, Junghoon Jee, Anthony Chan
Abstract: MRPM Tutorial
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2. IEEE 802.21 presentation release statements
This document has been prepared to assist the IEEE Working Group. 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.
The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE
The contributor is familiar with IEEE patent policy, as outlined in Section 6.3 of the IEEE-SA Standards Board Operations Manual < and in Understanding Patent Issues During IEEE Standards Development
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3. Multi-Radio Market
The market is seeing the introduction of many dual-radio devices.
For Example:
GSM/WiFi and CMDA2000/WiFi phones
EV-DO/WiMax on Cardbus
EV-DO/WiMax on USB
WiMax/WiFi on PCI-Express
Also consider:
The typical laptop with integrated wired and wireless LAN interfaces
New Mobile Internet Devices (MID) and Ultra-Mobile PC (UMPC)
From less than 6 million units in 2006, combo handsets will reach nearly 190 million by In-Stat research summary
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4. Multiple interfaces sharing a battery
802.16
3GPP;
3GPP2
Single-interface device:
Different technologies have different modes of operation each with different power consumption
802.11 + – + – + –
802.16
3GPP;
3GPP2
802.11
Multiple-interface device:
will drain battery fast if power consumption is optimized only within each individual network technology + –
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5. Existing Solutions End-User manually manages connections
Manual configuration frustrates the end-user because:
Time required to figure out which connection to use and enable it
Frustrated by short battery life
Knowledge required of the OS and installed interfaces to enable/disable interfaces
Client-based (typically laptops) connection management software
Searches for available networks
Based on pre-programmed criteria the software chooses the “most desirable” network (not necessarily “best-available”)
May or may not disable other interfaces (for the purpose of battery-life, network use cost-reduction, etc.)
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6. Connectivity Response time
Network, device, and application considerations in enhancing battery life
Different modes of operation
in different technologies
Battery life
also depends on
Fast call set up
PTT (interactive) + –
Active/on
Data rate?
Play back-start
Record-start
Discharge rate?
802.16
Sleep?
802.11
Sleep? + –
Connectivity
Response time
Temperature?
802.11
Idle?
CDMA
Sleep?
Charge count? + –
Webpage-start
Streaming-start
Background-start + –
Off/deep sleep
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7. MRPM mechanisms (using / extending MIH in network/device)
Enhance battery life by providing a power management framework enabling control of multi-radio power states depending on characteristics of each radio’s power consumption and application needs:
Enable a Network Selection Entity (NSE) to consider multi-radio power management policy inputs.
Inform the NSE of the current radio power configurations of a mobile device: whether radio is on, off-available, or off-do-not-disturb, etc. to determine the optimal power configuration of a multi-radio mobile device.
Signaling over an energy efficient channel while putting other radios in low power state.
Detect traffic destined for a radio interface in the off-available configuration and notifying the mobile device through an alternative “on” radio interface.
Avoid futile scanning using location and network information PoA location and coverage information.
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