IEEE 802 21 MEDIA INDEPENDENT HANDOVER Title MultiRadio

IEEE 802. 21 MEDIA INDEPENDENT HANDOVER Title: Multi-Radio Power Management Date Submitted: July, 2007 Presented at IEEE 802. 21 session #21, San Francisco Authors or Source(s): Behcet Sarikaya (Huawei), Muthu Venkatachalam, Emily Qi, DJ Johnston (Intel), Benjamin Koh (Panasonic) Others (TBD) Abstract: 802. 21 Multi-Radio Power Management SG proposal 21 -07 -0 xxx-00 -0000 1

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 outlined in Section 6. 3 of the IEEE-SA Standards Board Operations Manual <http: //standards. ieee. org/guides/opman/sect 6. html#6. 3> and in Understanding Patent Issues During IEEE Standards Development http: //standards. ieee. org/board/pat/guide. html> 21 -07 -0 xxx-00 -0000 2

802. 21 Multi-Radio Power Management Study Group Proposal 21 -07 -0 xxx-00 -0000 3

Current 802. 21 WG PAR • PAR says: “The purpose is to improve the user experience of mobile devices by facilitating handover between 802 networks whether or not they are of different media types, including both wired and wireless, where handover is not otherwise defined and to make it possible for mobile devices to perform seamless handover where the network environment supports it. These mechanisms may also be useable for handovers between 802 networks and non 802 networks. ” • IEEE 802. 21 WG did not address power management aspect of handovers as part of the current project (see 5 Criteria document) • Due to the desire to define MIHF protocol first 21 -07 -0 xxx-00 -0000 4

Problem Scope • Problem 1: Power Management for Paging and Wake on Wireless in Multi-Radio environment • Problem 2: Power Management for Location Update • Problem 3: Power Management for Idle Mode Protocol Related contributions: 21 -06 -0701 -00 -0000 -Media independent idle mode and paging. ppt 21 -06 -747 -00 -0000 -Idle Mode and paging. ppt 21 -06 -0806 -01 -0000 Media Independent Paging. ppt 21 -07 -0121 -00 -0000 Multi-Radio Paging. ppt 21 -07 -0 xxx-00 -0000 5

Multi-Radio Power Management • The goal is to develop interface primitives by extending current 802. 21 specification • The goal is to develop whatever is needed to enhance interface specifications for interoperability • The goal is not to develop power optimization algorithms on the mobiles because they are implementation specific and interoperability can not be tested 21 -07 -0 xxx-00 -0000 6

Problem 1: Power Management for Paging and Wake on Wireless in Multi-Radio environment 21 -07 -0 xxx-00 -0000 7

What is the Problem? • Current paging systems are designed to achieve power savings but the assumption is that there is only one interface • Current paging systems require periodic wake-ups in idle mode which consumes battery • Current paging systems signal to a large number of base stations in search of MN which leads to non-optimal usage of the mobile communications infrastructure • Considerable power savings at the MN can be achieved using multi-radio power management and also radio/network/device resource optimization at the mobile communication infrastructure can be provided in paging and wake on LAN in multi-radio mobiles 21 -07 -0 xxx-00 -0000 8

Usage Scenario 1 • Example: User is browsing on the Wi-Fi interface, User gets a Vo. IP call on the Wi. MAX interface, Wi. MAX network needs to page the user • Wake up Wi. MAX interface using Wi-Fi • MS receiving Paging Announcement Primitives: IEEE 802. 21 • BS/AP Paging Announcement Primitives: IEEE 802. 21 21 -07 -0 xxx-00 -0000 9

What’s Available Today? • Single-Radio Paging • Paging is defined in 3 GPP and Wi. Max • No paging is defined in 802. 11 at this point, but the Sleep Mode service (under development of 802. 11 v) can eventually accommodate this requirement • No standards group seems to be chartered to work on the multi-radio power management 21 -07 -0 xxx-00 -0000 10

Problem 2: Power Management for Location Update 21 -07 -0 xxx-00 -0000 11

What is the Problem? • Location of the mobile in idle mode needs to be updated. • Current systems are designed with a single interface in mind and therefore lead to high battery consumption because the interface has to stay active during location signaling • Single-radio or vertical systems do not take into account the additional capabilities arising from having multiple radios • In multi-radio mobiles, considerable power savings at the MN can be achieved by being able to use the active mode radio for location updates 21 -07 -0 xxx-00 -0000 12

Usage Scenario 2 • Example: User has Wi. Fi connection that is currently active and Wi. MAX connection that is idle Instead of contending on the Wi. MAX airlink, MS uses the Wi-Fi radio to perform location update for its Wi. MAX radio • MS Location Update Request/Response Primitives: IEEE 802. 21 21 -07 -0 xxx-00 -0000 • BS/AP Location Update Request/Response Primitives: IEEE 802. 21 13

Problem 3: Power Management for Idle Mode Protocol 21 -07 -0 xxx-00 -0000 14

What is the Problem? • Idle mode entry/exit needs to be signaled. • Current systems are designed with a single interface in mind and therefore lead to high battery consumption because the interface has to stay active during idle mode signaling • Single-radio or vertical systems do not take into account the additional capabilities arising from having multiple radios • Considerable power savings at the MN can be achieved using multi-radio power management by simply considering the multi-radio capability and use the active mode radio for idle mode signaling 21 -07 -0 xxx-00 -0000 15

Usage Scenario 3 • Example: Multiple radios are being switched to idle mode • For example: when the user takes a break, his Wi. MAX, Wi. Fi and 3 G connections may go into idle mode • IM Entry/Exit for radios i, j , k happens on radio-i • MS Enter/Exit Idle Mode Request/Response Primitives: IEEE 802. 21 21 -07 -0 xxx-00 -0000 • BS/AP Enter/Exit Idle Mode Request/Response Primitives: IEEE 802. 21 16

Savings on Battery Consumption • On 802. 11 interfaces, • On 802. 16 interfaces, 21 -07 -0 xxx-00 -0000 17

Potential Solution Approach • Extend 802. 21 with new primitives and information elements • ES extensions • • • CS extensions • • Power related link state change notification Power schedule events Configuration of power related behavior of clients IS extensions • Declaration of power management feature capability 21 -07 -0 xxx-00 -0000 18

Proposed Direction for Problems • Work on 802. 21 Enhanced Functionalities • From a wider perspective, single-radio power management systems adaptations for 802. 21 enhancements • No standards group is known to be working on the multi-radio power management Leverage on the current 802. 21 experience 21 -07 -0 xxx-00 -0000 19

Q & A? 21 -07 -0 xxx-00 -0000 20

802. 21 Multi-Radio Power Management SG Motion • Motion to get 802. 21 WG approval to form an 802. 21 Study Group on Multi. Radio Power Management in July 2007 to work on a PAR defining the scope and requirements of the identified areas • • Moved by: Seconded by: • • • Yes: No: Abstain: • Result: 21 -07 -0 xxx-00 -0000 21