1. IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-07-0120-00-0000
Title: IEEE P Update
Date Submitted: March, 2007
Presented at IEEE session #19 in Orlando, Florida
Authors or Source(s):
Vivek Gupta
Abstract: Update on IEEE P ( 802 standard for Handover services) .

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

3. IEEE 802.21 Standard Media Independent Handover Services
Optimize Layer 3 and above Handovers
Across 802 Networks and extend to Cellular Networks
(802.3 <> <> <> Cellular)
Key Benefits
Optimum Network Discovery and Selection
Seamless Roaming to Maintain Connections
Enables Network initiated Handovers (3G/802.16)
Lower Power operation for Multi-Radio devices
For More Information:
Tutorial on (July 2006)

4. Genesis for 802.21 Handover Execution Handover Initiation
Need for Handovers
Genesis for
Handover Initiation
Handover Preparation
Handover Execution
Scope of
Transfer Connection
Handover Signaling
Context Transfer
Packet Reception
Search New Link
Network Discovery
Network Selection
Handover Negotiation
Setup New Link
Layer 2 Connectivity
IP Connectivity
IEEE helps with Handover Initiation,
Network Selection and Interface Activation

5. Provides 802 component to other Handover Standards
Need for Handovers
Handover Standards
IEEE
802.11r
802.16e
3GPP/2
VCC
I-WLAN
SAE-LTE
IEEE
802.21
Horizontal Handovers
Inter-working & Handover Signaling
IETF
MIP
FMIP
SIP
HIP
NETLMM
DNA
MIPSHOP
IP Mobility & Handover Signaling
Provides 802 component to other Handover Standards

6. 802.21: Key Services Link Layer Triggers Network Information
Overview
802.21: Key Services
MIH Function
Protocol and Device Hardware
Applications (VoIP/RTP)
Connection Management
WLAN
Cellular
WMAN
L2 Triggers and Events
Information Service
Mobility Management Protocols
Smart Triggers
Handover Messages
Handover Management
Handover Policy
IEEE
IETF
Link Layer Triggers
State Change
Predictive
Network Initiated
Network Information
Available Networks
Neighbor Maps
Network Services
Handover Commands
Client Initiated
Vertical Handovers
(MIH) is Handover Protocol across different Media

7. Down selection Initial 802.21 Draft Text
History & Timeline
1H 2004
2H 2004
1H 2005
2H 2005
1H 2006
2H 2006
Year 2007
Year 2008
WG Created
14 Initial Proposals
WG Letter Ballot
Sponsor Ballot*
Deployment*
Initiate Amendments to u, g. IETF (MIPSHOP) on L3
Spec Ratified*
Call For Proposals
Down selection Initial Draft Text
* Projected Timelines
March –Orlando:
Resolving 481 Comments from LB #1c
Planning another ballot at end of this meeting
18 Disapprove Voters
Draft D4.0 available today, D5.0 on March 30th.

8. Network Discovery & Selection for 802.11
Initial Network Selection on Power Up
may be the DEFAULT radio to connect to on Power up or may be the only network coverage available in the area
Handover an existing connection to (from 3G/802.16)
The radio may be in OFF state in this case
When evaluating networks the Network Selection entity (in STA or Network) may need to know more about network properties even before deciding to Power On the radio

9. Network Selection with 802.11u & 802.21

10. (optional – STA to PS mode)
Use Case : Query SSPN List
STA
(11u-capable) AP
(11u-capable) IS
(local AN) IS
(“home” SSPN)
Pre-configuration
Advertising protocol ID (APID) = IS
Maximum acceptable length (LEN) for query responses
Pre-configuration
Beacon (Interworking IE, GAS:APID)
Probe Request
Probe Response (Interworking IE,
GAS:APID)
Relay MIH frame (with query content)
Note 1: Further investigation required
Note 2: Query ID required
Transport method: (1) 802.3, (2) IP
GAS initial request (request IE, APID)
Query content (“list of SSPNs?”)
GAS Initial Response (Query ID, Dialog
Token, comeback delay)
COLOR KEY
Needs work
(optional – STA to PS mode)
Comeback delay
MIH Response (transaction ID,
answer information); may be delayed
until answer is ready
Out of scope
802.11
GAS Comeback Request (Query ID)
802.21
GAS Comeback Response (Query ID,
answer information)

11. Joint Sessions with TGu
State-1 Issues
Query Response Length Limitations?
What information can be accessed by STA in State-1?
Deployment Issues
Communication between AP and IS?
How much interpretation does AP do of MIH requests?
Network initiated handovers (3G/ >802.11)?

12. Going Forward….Future Items in 802.21
Handovers in IMT Advanced Systems
WWAN<>WMAN<>WLAN<>WPAN
Security issues in Handovers
Security_proposal.ppt
Media Independent Paging
Multi-Radio%20Paging.ppt
Liaisons
3GPP/3GPP2
P1900.4, FMCA

13. Complementary Access Systems
802.21
Focus
Source: ITU-R Recommendation M.1645