1. IEEE 802. 16m SDD ToC for Inter RAT Handover
Document Number:
IEEE C802.16m-07/311r1
Date Submitted:
Source:
Jin Lee
Ronny (Yong-Ho) Kim
Kiseon Ryu
LG Electronics, Inc.
Re:
TGm Call for Contribution on SDD, IEEE m-07/040
Abstract:
Discussion on IEEE m SDD ToC for Inter RAT Handover
Purpose:
To discuss and adopt inclusion of inter RAT handover in the m SDD to improve user experience of m mobile devices.
Notice:
This document does not represent the agreed views of the IEEE Working Group or any of its subgroups. It represents only the views of the participants listed in the “Source(s)” field above. It is offered as a basis for discussion. It is not binding on the contributor(s), who reserve(s) the right to add, amend or withdraw material contained herein.
Release:
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
Patent Policy:
The contributor is familiar with the IEEE-SA Patent Policy and Procedures:
< and <
Further information is located at < and < >.

2. Motivation for Inter-RAT Handover
802.16m Requirements
IEEE 16m shall provide support for handover with other RATs. However, an IEEE m MS is not required to be multi-mode.
IEEE m shall provide service continuity during handover for both inter-RAT and intra-RAT handover.
IEEE m should support IEEE MIH services.
IEEE 16m shall support inter working functionality to allow efficient handover to other radio access technologies.
IEEE
3GPP GSM/EDGE/UTRA/EUTRA
3GPP2 CDMA2000

3. Current 16e Reference Features
802.16e Mobility
Not required to support inter RAT handover.
Supports handovers within homogeneous networks.
Does not capture use cases when an MS moves within different system environments.
IEEE MIH services may be used for inter RAT discovery and selection.
Limitation of having the MIH Function in an MS and a BS side.
WiMAX NWG
Provides the inter working architectures with 3GPP and 3GPP2 system at a network level.

4. Consideration for Inter RAT handover
16m BS shall provide inter RAT topology information.
Inter RAT Type, Physical parameters, etc.
16m MS shall be able to transfer radio capabilities
Single, multi radio, etc.
Inter RAT cell selection
Scanning configuration shall be differentiated depending on an MS’s radio capabilities.
Handover process
Handover preparation shall be allowed to support service continuity.
IEEE MIH services should be used for inter RAT discovery and selection.
Security shall be considered based on each RAT to allow inter RAT handover.

5. Proposed 16m Network Reference Model
O* : Interface between 16m BS and Non networks. Not defined in IEEE m standard.
However, m shall provide IEs and primitives to support Inter RAT HO.

6. Suggested SDD ToC for Inter RAT Handover
Inter RAT topology acquisition
Inter RAT mobility
Scanning
Single radio MS
Multi radio MS
Handover process
Security for inter RAT handover