1. IEEE 802.21 MEDIA INDEPENDENT HANDOVER
DCN: bcst
Title: TGb_Proposal_Hongseok_Jeon
Date Submitted: Sep. 13, 2009
Presented at IEEE session #34 in HAWAII
Authors or Source(s):
Hongseok Jeon, Junghoon Jee, Eunah Kim, Changmin Park (ETRI)
Abstract: This proposal is a contribution for the b in response to /0129r1-bcst call-for-proposal. It proposes a mechanism for supporting a group handover between bidirectional network and DO network. Intention is to further discussion and accordingly update the text version of the proposal.

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 stated in Section 6 of the IEEE-SA Standards Board bylaws < and in Understanding Patent Issues During IEEE Standards Development

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Introduction
This proposal addresses below two use cases defined in document bcst.
Use case 4: Load balancing
Use case 8: Program availability
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Assumption
Use case 4: Load balancing
In bidirectional networks, many unicast subscribers to a same program justifies using multicast or broadcast transmission.
Recently, bidirectional networks are developing their own multicast transmission mechanism (e.g., 3GPP MBMS)
Bidirectional networks also can suffer when the subscribers joined the same multicast session are widely distributed on the bidirectional network.
Bidirectional networks can recommend the group of subscribers that they perform to handover to DO networks.
Use case 8: Program availability
Due to a predefined schedule, a program is no longer available on the specific technology (e.g. extra time on a sports match).
A group of users watching the particular program are able to want to keep watching the program.
The networks can recommend a handover to the group of users so that this program can be continued on a different technology.
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Requirements
Network controlled handover between DO and bidirectional network.
Network should recognize its own resource state and its program unavailability.
Network should perform a service discovery.
Network should have selected networks be prepared so that they provide the service seamlessly.
Group handover request
Network should recommend handover to a group of users simultaneously.
Upon receiving the recommendation to handover, MNs should try to perform the network-controlled handover if they want and it is possible to access a recommended network.
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Our Proposal (1/2)
For network controlled handover.
For monitor its own resource state and its program unavailability,
new MIES can be used.
For querying available services on the neighboring networks,
Network can use MIH_N2N_HO_Query_Resource with new parameters.
For preparing selected target networks for handover,
Network can use MIH_N2N_HO_Commit with new parameters.
Details of the above new parameters will be presented in the text version of the proposal.
For group handover request,
focuses handover procedures only for single MN.
Hence, there is a need for a new MIH command (e.g., MIH_Net_Bcst_HO_Notify) to recommend a handover to a group of MN simultaneously when the network decides to perform a handover.
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Our Proposal (2/2)
General description of MIH_Net_Bcst_HO_Notify
With MIH_Net_Bcst_HO_Notify, the network controller notifies a group of MNs of a selected target network and recommends the MNs to perform a network-controlled handover based on the selected target networks and PoA.
Once the target networks are informed, the MNs try to perform the network-controlled handover if they want.
MIH_Net_Bcst_HO_Notify is delivered by specific broadcast or multicast bears by which the program to be handed over is being transmitted.
MIH_Net_Bcst_HO_Notify does not require any response from MNs.
Primitives for MIH_Net_Bcst_HO_Notify
MIH_Net_Bcst_HO_Notify.reqest
MIH_Net_Bcst_HO_Notify.indication
Details of the new primitives will be presented in the text version of the proposal.
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8. Network-controlled Group Handover Procedures (From bidirectional to DO)
Mobile Nodes
Bidirectional Network
DO Network
MIIS Server
MIH_Get_Information req/rsp
Service or program discovery
MIH_N2N_HO_Query_Resources req/rsp
Bidirectional network informs selected a target DO network that MNs are about to move to them .
If the program is not available now, initialization of the program is required.
MIH_N2N_HO_Commit req/rsp
Bidirectional network informs MN of program requiring a handover .
Bidirectional network informs MN of the selected target DO networks.
MIH_Net_Bcst_HO_Notify req
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9. Network-controlled Group Handover Procedures (From DO to bidirectional)
Mobile Nodes
Bidirectional Network
DO Network
MIIS Server
MIH_Get_Information req/rsp
QoS query and Service or program discovery
MIH_N2N_HO_Query_Resources req/rsp
DO network informs the selected target bidirectional network that MNs are about to move to the target network .
If the program is not available now, initialization of the program is required.
MIH_N2N_HO_Commit req/rsp
DO network informs MN of the channel (program) requiring a handover .
Do network informs MN of the selected target bidirectional network.
MIH_Net_Bcst_HO_Notify req
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Thanks!
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