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IEEE 802.21 MEDIA INDEPENDENT HANDOVER

Title: Multi-Radio Power Conservation Management

Date Submitted: November 7, 2008

Presented at IEEE 802.21 session #29 in Dallas

Authors or Source(s): George Babut, Kevin Knoll, Dennis Edwards, Behcet Sarikaya, Junghoon Jee, Anthony Chan

Abstract: MRPM Tutorial

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IEEE 802.21 presentation release statementsThis document has been prepared to assist the IEEE 802.21 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 802.21.

The contributor is familiar with IEEE patent policy, as outlined in Section 6.3 of the IEEE-SA Standards Board Operations Manual <http://standards.ieee.org/guides/opman/sect6.html#6.3> and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/guide.html> 

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MRPM Tutorial

• Need for Mult-Radio Power Conservation Management

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Multi-Radio Market(Kevin A. Noll, DCN 21-08-0226-01)

• 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)

• These are just examples. Many other variations are on the horizon.

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Multi-radio Device Market(Dennis Edwards)

• Mobile devices that can access multiple wireless networks are the fastest growing market segment

• Up 42% in 2006 while unconnected devices shipments fell 41% Canalys press release (visited Nov 5, 2008) 64 million smart phones shipped worldwide in 2006

• Up 60% in 2007 Canalys press release (visited Nov 5, 2008) Smart mobile device shipments hit 118 million in 2007, up 53% on 2006

• From less than 6 million units in 2006, combo handsets will reach nearly 190 million by 2011. In-Stat research summary (visited Nov 5, 2008) WiFi – Where’s the money?

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MRPM as an enabling feature for MIH(George Babut)

• Power consumption is a major implementation factor in any handheld terminal

• Terminal power consumption, and corresponding battery life, are make-or-break adoption factors for any mobile access technology

• MRPM is, from that standpoint, a major enabler of implementability of multi-mode mobile handheld terminals

• Secondarily, MRPM as part of MIH, will augment the adoption rate of MIH, as it will increase the feasibility of power efficient multi-mode terminals

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Adoption of MIH conditioned by Power Consumption in Multi-Mode Handsets

(George Babut)• The adoption of MIH depends on the availability of less generic

alternative solutions for early implementations of vertical HO by the interested multi-domain converged operators

• I-WLAN and UMA are examples of early non-MIH solutions

• When it comes to increasing the adoption rate of MIH we need to analyze the “bottlenecks” of viable implementations of vertical HOs

• One major bottleneck in the implementation of multi-mode terminals is the overall power management mechanism for different radios, each with its own mechanism

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UMA case experience(George Babut, DCN 21-08-0228-00)

• UMA is a very relevant example of how much impact the power consumption in a dual mode terminal can have upon the early adoption of dual access approaches

• UMA terminal is a GSM – WLAN dual terminal

• Early UMA terminals had unsatisfactory power consumption performance, that delayed the commercial UMA service launch

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Need (5.5)

• As the number of multi-radio mobile devices increases, so does the need to improve the device battery life. While platform and network specific power managers exist, they operate independently without considering the overall power consumption of a multi-radio mobile device. This project will enhance battery life by providing a power management framework that enables control of multi-radio power states depending on each radio’s power consumption characteristics and each radio’s network accessibility at the current location.

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MRPM Tutorial

• Need for Mult-Radio Power Conservation Management

• The problem

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The Problem(Dennis Edwards)

• “Before employers can insist that employees use fewer devices, manufacturers need to address battery life and ergonomics issues for portable devices.” In-Stat Research summary, Current Converged Mobile Devices Fail to Compel Users

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Multiple interfaces sharing a battery

802.11802.11802.16

3GPP;3GPP2

802.11802.11802.16

3GPP;3GPP2

+–

+–

+–

+–

Multiple-interface device will drain battery fast if power consumption is optimized only within each individual network technology

Single-interface device:Different technologies have different modes of operation each with different power consumption

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Battery life considerations?C

on

nec

tivi

ty

Different modes of operationin different technologies

Active/on

Off/deep sleep+–

CDMASleep?

802.11Sleep?

802.16Sleep?802.11Idle?

+–

Resp

on

se time

+–

+–

Data rate?

Discharge rate?

Temperature?

Charge count?

Battery lifealso depends on

Play back-start

Fast call set up

Record-start

Streaming-start

Background-start

PTT (interactive)

Webpage-start

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Enhance the user experience by extending the battery operating life of

multi-radio mobile devices. (5.4) with standard and generalized framework

802.11802.11802.16

3GPP;3GPP2

+–

MediaIndependent

Function

MIH

_S

AP

Commandservice

EventService

InformationService

Eventservice

CommandService

InformationService

MIH

_L

INK

_SA

P

Info Server

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Existing Solutions(Kevin A. Noll, DCN 21-08-0226-01)

• 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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Multi-Radio Power Conservation Management

(with standard and generalized framework)

MediaIndependent

Function

MIH

_S

AP

Network 2(e.g., 3GPP)Command

service

EventService

LLC_SAP

Network 1 (e.g., 802.16)

LLC_SAP

InformationService

Eventservice

CommandService

InformationService

MIH

_L

INK

_SA

P

MIH

_L

INK

_SA

P

MRPMapplicationInfo Server

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Scope (5.2)

• Define mechanisms to reduce power consumption of multi-radio mobile devices on heterogeneous IEEE 802.21 compliant networks.

• Enhancements to the MAC/PHY of individual access technologies for making them more power efficient are outside the scope of this project.