A.8 Attach to an additional access network
24.3033GPPMobility management based on Dual-Stack Mobile IPv6Release 17Stage 3TS
A.8.1 Binding Update
The DSMIPv6 attach to additional access network procedure is described in subclause 5.5 and the fields of a BU message used for this procedure are depicted in table A.8.1-1.
The DSMIPv6 attach to additional access network procedure is described in subclause 5.5 and the Mobility Options in a BU message used for this procedure are depicted in table A.8.1-2.
Table A.8.1-1: Fields of a BU message for the DSMIPv6 attach to an additional access network procedure
|
Fields |
Fields Description |
Reference |
|
Sequence Number |
Set to a monotonically increasing value. |
IETF RFC 6275 [27] |
|
Lifetime |
Set to the requested number of time in units of 4 seconds to indicate how long the binding will remain valid. |
IETF RFC 6275 [27] |
|
Home Registration (H) |
Set to "1" to indicate receiving node can act as this node’s HA |
IETF RFC 6275 [27] |
|
Link-local Address Compatibility (L) |
The Link-Local Address Compatibility (L) bit is set when the home address reported by the mobile node has the same interface identifier as the mobile node’s link-local address. |
IETF RFC 6275 [27] |
|
Key Management Mobility Capability (K) |
Set to "1" to indicate IKEv2 SA ability to survive mobility |
IETF RFC 6275 [27] |
|
Acknowledge (A) |
Set to "1" to request an acknowledgement message. |
IETF RFC 6275 [27] |
|
Force UDP encapsulation request (F) Flag |
Set to "0" to indicate no forced UDP encapsulation |
IETF RFC 5555 [2] |
|
Mobile Router Flag (R) |
Set to "1" to indicate home network prefix preservation for the UE. |
IETF RFC 3963 [29] |
|
Overwrite Flag (O) |
If the UE attaches to a foreign link, set to "1" to indicate first registration |
IETF RFC 5648 [31] |
|
If the UE attaches to the home link, set to "0" to maintain all binding cache entries at the HA previously registered. |
Table A.8.1-2: Mobility Options in a BU message for the DSMIPv6 attach to an additional access network procedure
|
Mobility Option |
Cat. |
Mobility Option Description |
Reference |
|
IPv4 Home Address option |
O |
Set to the value "0.0.0.0" to request allocation of an IPv4 Home Address for the UE. |
IETF RFC 5555 [2] |
|
The "P" flag is set to ‘0’. |
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|
The Prefix Length is set to the requested prefix length of ’32’. |
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|
Binding Identifier mobility option |
O |
The BID and BID-PRI are set to an arbitrary value. |
IETF RFC 5648 [31], IETF RFC 6089 [32] |
|
For registration of a home link, the "H" flag is set to "1" and the value of the CoA field is the Home Address. |
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|
For registration of a foreign link, the "H" flag is set to "0" and the value of the CoA field is the Care-of Address. |
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|
Flow Identification mobility option |
O |
The FID and FID-PRI are set to an arbitrary value. |
IETF RFC 6089 [32], IETF RFC 6088 [33] |
|
The sub-option field conveys the Traffic Selector sub-option. |
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|
Flow Summary mobility option |
O |
Contain one or more FIDs present in the binding update list to refresh the respective flow bindings. |
IETF RFC 6089 [32] |
A.8.2 Binding Acknowledgement
The DSMIPv6 attach to additional access network procedure is described in subclause 5.5 and the fields of a BA message used for this procedure are depicted in table A.8.2-1.
The DSMIPv6 attach to additional access network procedure is described in subclause 5.5 and the Mobility Options in a BA message used for this procedure are depicted in table A.8.2-2.
Table A.8.2-1: Fields of a BA message for the DSMIPv6 attach to an additional access network procedure
|
Fields |
Fields Description |
Reference |
|
Status |
Set to indicate the result. |
IETF RFC 6275 [27] |
|
Key Management Mobility Capability (K) |
Set as per HA ability to support the feature of updating the IKE SA based on Binding Update processing |
IETF RFC 6275 [27], IETF RFC 5555 [2] |
|
Mobile Router Flag (R) |
Set to "1" |
IETF RFC 3963 [29] |
|
Sequence Number |
Set to the value received in the corresponding Binding Update. |
IETF RFC 6275 [27] |
|
Lifetime |
Set to the granted number of time units of 4 seconds to indicate how long the binding will remain valid. |
IETF RFC 6275 [27] |
Table A.8.2-2: Mobility Options in a BA message for the DSMIPv6 attach to an additional access network procedure
|
Mobility Option |
Cat. |
Mobility Option Description |
Reference |
|
IPv4 Address Acknowledgment option |
C |
If IPv4 Home Address option is present in the corresponding BU, IPv4 Home Address is set to the IPv4 Home Address allocated for the UE. |
IETF RFC 5555 [2] |
|
The supporting Status field is set accordingly. |
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|
Pref-len field is set to "32". |
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|
NAT Detection Option |
C |
When present the option contains the F Flag which indicates to the UE that UDP encapsulation is required. Option contains an optionally Refresh Time for the UE to refresh the NAT binding. |
IETF RFC 5555 [2] |
|
Binding Refresh Advice |
O |
Contains a Refresh Interval in units of 4 seconds indicating the remaining time until the UE could send a new home registration to the HA. |
IETF RFC 6275 [27] |
|
Binding Identifier mobility option |
C |
The option is present if the UE sent a Binding Identifier mobility option in the corresponding BU. The Status field is set accordingly. |
IETF RFC 5648 [31], IETF RFC 6089 [32] |
|
The BID and BID-PRI are set to the value indicated in the BID mobility option of the received Binding Update. |
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|
Flow Identification mobility option |
C |
The option is present if the UE sent a Flow Identification mobility option in the corresponding BU. The Status field is set accordingly. |
IETF RFC 6089 [32], IETF RFC 6088 [33] |
|
The FID, FID-PRI and sub-option field are set to the value indicated in the FID mobility option of the received Binding Update. |