1. IEEE 802.21 MEDIA INDEPENDENT HANDOVER
DCN: srho
Title: Recap of Multi-Radio Power Management (MRPM)
Date Submitted: September 21, 2011
Presented at IEEE 802 interim in Bangkok
Authors or Sources: Dennis Edwards, Behcet Sarikaya, James Han, Junghoon Jee, Anthony Chan
Abstract: Recap of Multi-Radio Power Management for the future planning of IEEE 1

2. IEEE 802.21 presentation release statements
doc.: IEEE /0570r0
April 2007
IEEE 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 stated in Section 6 of the IEEE-SA Standards Board bylaws < and in Understanding Patent Issues During IEEE Standards Development 2

6. What IEEE 802.21 targeted… Airport Home 3G WWAN
Operating on 3G WWAN
Zone 1
Zone 2
Zone 3
Plug into power jack Turn on Wi-Fi
Continue over Wi-Fi
Turn on Wi-Fi
Zone 4
Zone 5
Zone 6
Airport
Radio State
3G WWAN
Wi-Fi
WiMAX
GPS
Radio State
3G WWAN
Wi-Fi
WiMAX
GPS
Radio State
3G WWAN
Wi-Fi
WiMAX
GPS
Radio State
3G WWAN
Wi-Fi
WiMAX
GPS
Radio State
3G WWAN
Wi-Fi
WiMAX
GPS
Radio State
3G WWAN
Wi-Fi
WiMAX
GPS
Radio State
3G WWAN
Wi-Fi
WiMAX
GPS
Wi-Fi Link Going Down.
Connect to Wi-Fi
Home
Continue session on 3G WWAN
Continue session on Wi-Fi
Battery level low
Shutdown WiMAX
Switch to 3G WWAN
Shutdown Wi-Fi
Operator initiated switch to WiMAX
Continue session on WiMAX
Zone 7
WiMAX
Zone 8
WiMAX
Zone 9
IEEE for Network Discovery
IEEE , SIP, VCC, IMS, for Network Selection and Service Continuity across multiple radios (3G WWAN  Wi-Fi  WiMAX)
802.21, SIP, IMS for Service Continuity (Wi-Fi  WiMAX)
VCC, SIP, IMS for Call Continuity (3G WWAN  Wi-Fi)

7. Contents Overview MRPM Principle MRPM Use cases
Existing power management in individual radio technology
Power Management Problems
Basic MIH capabilities 7

8. Contents Overview Power Management Problems MRPM Principle
MRPM Use cases
Existing power management in individual radio technology
Basic MIH capabilities 8

9. Multi-Radio Activities in IEEE 802.21
Optimized Handover between different technologies
IEEE , Published in Jan-2009
Security Signaling during Handovers
IEEE a, PAR Approved in Dec-2008
Handovers to Broadcast Technologies
IEEE b, PAR Approved in Jan-2009
Battery Power Conservation in Multi-Radio devices
MRPM (IEEE c)
IEEE : to support handover optimization (using L2 trigger, neighboring network map and MIH handover procedure)
IEEE a : to reduce the latency during authentication and key establishment for handovers, and to provide secure MIH protocol exchange and enable authorization for MIH services
IEEE b : 9

10. Contents Overview Power Management Problems MRPM Principle
MRPM Use cases
Existing power management in individual radio technology
Basic MIH capabilities 10

11. Rapid Power Consumption by Multiple Radios
802.16
3GPP;
3GPP2
802.16
3GPP;
3GPP2
Power
802.11
802.11 R1 R2 R3 R1 + – + – + – + –
Battery life
Drains battery fast if power consumption is optimized only within each individual technology
Different technologies have different modes of operation each with different power consumption
Battery life
Service
Standby
Sleep
Battery life (approx. # only for cellular )
1 radio R1
2 hrs (talk time)
2 radios
3 radios
24 hrs (customer expectation)
R1,R2
12 hrs
R1,R2,R3
8 hrs
6 days (customer expectation)
3 days
2 days 11

12. Contents Overview Power Management Problems MRPM Principle
MRPM Use cases
Existing power management in individual radio technology
Basic MIH capabilities 12

13. Multi-Radio Power Management (1)
Purpose: Enhance the user experience by extending the battery operating life of multi-radio mobile devices.
Scope: Define mechanisms to reduce power consumption of multi-radio mobile devices based on IEEE services.
Not in Scope: Enhancements to the MAC/PHY of individual access technologies for making them more power efficient are outside the scope of this project. 13

14. Multi-Radio Power Management (2)
Enables to put inaccessible or unused radios into lower power states (Off or Deep-sleep)
Enables to activate the deactivated radios when required
Within coverage area, application requirement, network capacity
Enables to select best radio and its corresponding power state for an application service
Enables to minimize the time in accessing the network when activating a radio
Acquiring configuration parameters to access the network in advance 14

15. Multi-Radio Power Management (3)
Single radio
Multiple radios
Multiple radios with MRPM
Power
Power
Power
negligible
Battery life
negligible
Battery life
Battery life 15

16. Multi-Radio Power Management (4)
QoS
Operator Policy
Network
Selection
Policy
Control
Multi
Interface
Control
Resource
Management
operates in
a power efficient way!
MIH
(Neighboring
Network
MAP)
MIH
MRPM
- Device power
characteristics
- Each I/F status
(power state)
MRPM
Location
Network Accessibility
Power States
Power States Control
WiFi
WiMAX
3GPP
Radio
(WiFi, WiMAX, 3GPP)
Mobile Node
Network Node

17. Contents Overview Power Management Problems MRPM Principle
MRPM Use cases
Minimizing Power Consumption
Network Selection
Lowest power configuration
Use of deep sleep state
Existing power management in individual radio technology
Basic MIH capabilities 17

18. Use Case #1. In Service
Multiple radios are active for application services
Primary Radio MAY be mainly utilized for application services
Unutilized radios are put into Off or Deep-Sleep
Each radio controlled independently
Power
In service
Sleep
In service
Potential MRPM solution
Power
Putting radios in lower power states
In service
Deep Sleep
Off or Deep Sleep 18

19. Use Case #2. No Service
Each radio controlled independently
Power
Multiple radios are in sleep states consuming unnecessary power
Unutilized radio is put into Off or Deep-Sleep
Idle
Sleep
Sleep
Potential MRPM solution
Power
Idle
Off or
Deep Sleep
Off or
Deep Sleep 19

20. Use Case #3. Single Idle State
Each radio controlled independently
Power
Multiple radios are in idle states
Primary radio may be utilized for paging
Unnecessary idle state radio is put into deep sleep or off state
Out of coverage area
Coverage overlap
Location management through single idle state radio
Idle
Sleep
Idle
Potential MRPM solution
Power
Idle
Off or
Deep Sleep
Off or
Deep Sleep 20

21. Case 4 Illustration of Use Cases
TAU to 3GPP paging controller.
3GPP
Tracking Area
Use Case #3
WiMAX is turned-off
Cell 5
AP 5
MRPM
Cell 6
WiMAX
Paging Area B
AP 6
3GPP
Paging Controller
WiMAX
Paging Controller
WiFi is turned-off
Use Case #2
WiMAX
Paging Area A
Cell 4
AP 4
WiFi into PSM
Cell 3
AP 3
AP 1
Cell 2
Cell 1
AP 2
Application is terminated
Multiple Active Radios
Single Active Radio
Use Case #1

22. Contents Overview Power Management Problems MRPM Principle
MRPM Use cases
Existing power management in individual radio technology
Basic MIH capabilities 22

23. 802.21 media independent handover (MIH) services
Layer 3 and Above Layers
SIP
MIH
Function
Information
Service
MIH_SAP
Event
Service
MIP
HMIP
Command
Service
LLC_SAP
LLC_SAP
Network 1
(e.g., )
Network 2
(e.g., 3GPP)
Information
Service
MIH_LINK_SAP
MIH_LINK_SAP
Event
Service
Command
Service
Handover 23

24. 802.21 MIH at devices and at networks enables collaboration between them
Higher Layer
Higher Layer
MIHF
MIHF IP IP
Logical Connection
between
peer nodes
MIH_NET_SAP
MIH_NET_SAP
MAC
MAC
PHY
PHY
802.11u
802.16g 24

25. MRPM
PAR/5C is at:
Feedback: 25

26. Thank you 26