1. IEEE 802.21 MEDIA INDEPENDENT HANDOVER
DCN:
Title: MIH Registration Amendments
Date Submitted: Nov.1, 2006
Submitted for discussion and possible inclusion in the draft against LB_1a comment
Authors or Source(s): Xiaoyu Liu
Abstract: This contribution proposes MIH protocol registration amendments, mainly for reregistration

2. IEEE 802.21 presentation release statements
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3. Technical Issues regarding MIH Registration
between MIHF in MN and MIHF in a serving network.
between MIHF in a serving network and detected network.
Deregistration
Re-Registration procedure…

4. Re-Registration – What?
A mechanism between peer MIHF entities to indicate that the MN is still registered to the network.
The difference between registration and re-registration
Registration establishes a new session; a new Session ID is created;
Re-registration refreshes an existing session; no need to create a new session ID

5. Re-Registration – When?
Two cases:
When the information pertaining to the joined POA has changed
E.g., POA changes due to homogeneous handovers
Periodic transmission (lifetime of a session)
The MN determines that the peer MIHF is still available using the currently established lower layer connection.

6. Re-Registration – Proposed Texts
The related texts in D2.0
Section , pp.93, line#29: ‘Re-Registration scope to be defined.
Comment #266 to propose the primitives for MIH Re-registration
Remedy #3 in contribution
Key points: existing session ID in the semantics of requests
Comment #378 to propose the messages for MIH Re-registration
Remedy #4 in contribution

7. Other Amendments Comment #215 to propose texts for section 6.4.4
Remedy 1 in contribution
Comment #267 to add Session ID in the deregistration primitives.

8. Other Issues to be discussed
The indication and confirm primitives shall be added.
Abnormal cases in MIH registration shall be considered:
Registration failure cases, e.g., registration rejected.
Lifetime expiry for active sessions
Link layer failure due to unreliable lower layer links