1. 21-11-0161-01-0000 1 IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-11-0161-01-srho Title: Recap of Multi-Radio Power Management (MRPM) Date Submitted: September 21, 2011 Presented at IEEE 802 interim in Bangkok Authors or Sources: Junghoon Jee, Anthony Chan, Dennis Edwards, Behcet Sarikaya, James Han, Abstract: Recap of Multi-Radio Power Management for the future planning of IEEE 802.21

2. 2 IEEE 802.21 presentation release statements This 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 stated in Section 6 of the IEEE-SA Standards Board bylaws and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/faq.pdf> Section 6 of the IEEE-SA Standards Board bylawshttp://standards.ieee.org/guides/bylaws/sect6-7.html#6http://standards.ieee.org/board/pat/faq.pdf 21-11-0161-01-0000

6. 3G WWAN Home Airport Zone 1Zone 2Zone 3 Zone 4 Zone 5 Zone 6 Zone 7Zone 9 WiMAX Zone 8 WiMAX 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 IEEE 802.21 for Network Discovery IEEE 802.21, 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) Plug into power jack Turn on Wi-Fi Continue over Wi-Fi Wi-Fi Link Going Down. Shutdown Wi-Fi Operator initiated switch to WiMAX Continue session on WiMAX Connect to Wi-Fi Battery level low Shutdown WiMAX Switch to 3G WWAN Turn on Wi-Fi Continue session on Wi-Fi Operating on 3G WWAN Continue session on 3G WWAN What IEEE 802.21 targeted…

7. 21-11-0161-01-0000 7 Contents Overview MRPM Principle MRPM Use cases Existing power management in individual radio technology Power Management Problems Basic MIH capabilities

8. Moving Forward Single Radio Operation 21-11-0161-01-0000 8

9. 9 Contents Overview Power Management Problems MRPM Principle MRPM Use cases Existing power management in individual radio technology Basic MIH capabilities

10. 21-11-0161-01-0000 10 Optimized Handover between different technologies IEEE 802.21, Published in Jan-2009 Security Signaling during Handovers IEEE 802.21a, PAR Approved in Dec-2008 Handovers to Broadcast Technologies IEEE 802.21b, PAR Approved in Jan-2009 Battery Power Conservation in Multi-Radio devices MRPM (IEEE 802.21c) Multi-Radio Activities in IEEE 802.21

11. 21-11-0161-01-0000 11 Contents Overview Power Management Problems MRPM Principle MRPM Use cases Existing power management in individual radio technology Basic MIH capabilities

12. 21-11-0161-01-0000 12 Rapid Power Consumption by Multiple Radios 802.11 802.16 3GPP; 3GPP2 +–+– +–+– +–+– Different technologies have different modes of operation each with different power consumption 802.11 802.16 3GPP; 3GPP2 +–+– Drains battery fast if power consumption is optimized only within each individual technology ServiceStandbySleepBattery life (approx. # only for cellular ) 1 radio R12 hrs (talk time) 1 radio 2 radios 3 radios R124 hrs (customer expectation) R1,R212 hrs R1,R2,R38 hrs 1 radio 2 radios 3 radios R16 days (customer expectation) R1,R23 days R1,R2,R32 days Power Battery life Power Battery life R1 R2R3R1

13. 21-11-0161-01-0000 13 Contents Overview Power Management Problems MRPM Principle MRPM Use cases Existing power management in individual radio technology Basic MIH capabilities

14. 21-11-0161-01-0000 14 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 802.21 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.

15. 21-11-0161-01-0000 15 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

16. 21-11-0161-01-0000 16 Multi-Radio Power Management (3) Power Battery life Power Battery life Power Battery life negligible Single radioMultiple radiosMultiple radios with MRPM

17. 21-11-0161-01-0000 17 Multi-Radio Power Management (4) MIH (Neighboring Network MAP) MIH (Neighboring Network MAP) MRPM - Device power characteristics - Each I/F status (power state) MRPM - Device power characteristics - Each I/F status (power state) WiMAX WiFi 3GPP MIH MRPM -Location -Network Accessibility MRPM -Location -Network Accessibility Policy Control Policy Control Multi Interface Control Multi Interface Control Network Selection Network Selection Radio (WiFi, WiMAX, 3GPP) Radio (WiFi, WiMAX, 3GPP) Resource Management Resource Management QoS Operator Policy Power States Power States Control

18. 21-11-0161-01-0000 18 Contents Overview Power Management Problems MRPM Principle MRPM Use cases 1. Minimizing Power Consumption 2. Network Selection 3. Lowest power configuration 4. Use of deep sleep state Existing power management in individual radio technology Basic MIH capabilities

19. 21-11-0161-01-0000 19 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 Power In serviceSleep In service Power In service Off or Deep Sleep Each radio controlled independently Potential MRPM solution Deep Sleep

20. 21-11-0161-01-0000 20 Use Case #2. No Service Power Idle Sleep Power Idle Off or Deep Sleep Off or Deep Sleep Multiple radios are in sleep states consuming unnecessary power Unutilized radio is put into Off or Deep-Sleep Each radio controlled independently Potential MRPM solution

21. 21-11-0161-01-0000 21 Use Case #3. Single Idle State Power Idle Sleep Idle Power Idle Off or Deep Sleep Off or Deep Sleep 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 Each radio controlled independently Potential MRPM solution

22. 21-11-0161-01-0000 22 Case 4 Illustration of Use Cases WiMAX Paging Area B 3GPP Tracking Area AP 6 AP 5 Cell 5 Cell 6 TAU to 3GPP paging controller. Cell 1 Cell 2 Cell 3 Cell 4 AP 1 AP 2 AP 3 AP 4 Multiple Active Radios WiMAX Paging Area A Application is terminated WiFi into PSM WiFi is turned-off WiMAX is turned-off Single Active Radio Use Case #1 Use Case #2 Use Case #3 MRPM 3GPP Paging Controller WiMAX

23. 21-11-0161-01-0000 23 Contents Overview Power Management Problems MRPM Principle MRPM Use cases Existing power management in individual radio technology Basic MIH capabilities

24. 21-11-0161-01-0000 24 802.21 media independent handover (MIH) services MIH Function MIH_SAP Network 2 (e.g., 3GPP) Network 1 (e.g., 802.16) MIH_LINK_SAP LLC_SAP Handover Event Service Command Service Information Service Command Service Event Service Information Service LLC_SAP SIP MIPHMIP Layer 3 and Above Layers

25. 21-11-0161-01-0000 25 802.21 MIH at devices and at networks enables collaboration between them 802.11u 802.16g Higher Layer IP MAC PHY Higher Layer IP MAC PHY MIHF MIH_NET_SAP MIHF MIH_NET_SAP Logical Connection between peer nodes

26. 21-11-0161-01-0000 26 MRPM PAR/5C is at: https://mentor.ieee.org/802.21/file/08/21-09-0021-00-mrpm- revised-par-and-5c.dochttps://mentor.ieee.org/802.21/file/08/21-09-0021-00-mrpm- revised-par-and-5c.doc Feedback: anthonychan@huawei.com; jhjee@etri.re.kr;anthonychan@huawei.comjhjee@etri.re.kr STDS-802-21@LISTSERV.IEEE.ORG

27. 21-11-0161-01-0000 27 Thank you