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IEEE 802.21 MEDIA INDEPENDENT HANDOVER
DCN: 21-06-xxx-00-0000
Title: Pre-establishment of IP connectivity discussion
Date Submitted: April 2006
Authors or Source(s): Qiaobing Xie
• Abstract: This is for discussion at the April 20, 2006 teleconference
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Multi-interfaced Device under Overlapped Coverage
Network 3 (UMTS)
Network 2 (WiMAX)
Network 1 (WiFi hot-spot)
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Soon to become a common scene
Pre-establishing IP Connectivity before handover
Network 3 (UMTS)
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Network 2 (WiMAX)
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Network 1 (WiFi hot-spot)
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Pre-establish IP connections
to potential handover target
networks.
Use the current connection to
save battery and RF
resources.
A pre-established IP
connection will be activated
if a handover to that network
actually happens and a subIP layer connection is set up.
Shortens handover delay.
When the mobile moves out
of a coverage, the preestablished IP connection to
that network will be
removed.
What’s needed to pre-establish an useful IP connectivity?
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Pre-authentication and pre-authorization
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Some work has started in IETF - “AAA authentication/Authorization for target
Authenticator while session is in progress on the serving Authenticator.” IETF 65th HOAKEY BOF (Yoshihiro Ohba)
How can 802.21 facilitate this?
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Pre-allocation of a valid IP address (and other IP layer parameters)
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How can 802.21 facilitate this?
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Passing AAA contact address of neighbor networks thru MIH IS?
etc.
Passing IP Address Configuration methods of neighbor networks thru MIH IS;
Passing DHCP contact address from the neighbor networks through MIH IS if DHCP
is used;
etc.
What else 802.21 can provide?
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