A.2 Initial Binding Registration

24.3033GPPMobility management based on Dual-Stack Mobile IPv6Release 17Stage 3TS

A.2.1 Binding Update

The fields of a BU message for the DSMIPv6 Initial Binding Registration procedure are depicted in Table A.2.1-1.

The Mobility Options in a BU message for the DSMIPv6 Initial Binding Registration procedure are depicted in Table A.2.1-2.

Table A.2.1-1: Fields of a BU message for the DSMIPv6 Initial Binding Registration 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 the binding shall remain valid.

IETF RFC 6275 [27]

Home Registration (H)

Set to "1" to indicate receiving node should 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)

Set to "1" to indicate replacing all binding cache entries at the HA with the entries listed in the Binding Update.

IETF RFC 5648 [31]

Table A.2.1-2: Mobility Options in a BU message for the DSMIPv6 Initial Binding Registration procedure

Mobility Option

Cat.

Mobility Option Description

Reference

IPv4 Home Address option

O

Set to the value "0.0.0.0" to request allocation for the UE. The "P" flag is set to ‘0’.

The Prefix Length is set to the requested prefix length of ’32’.

IETF RFC 5555 [2]

IPv 4 Care-of Address

C

Set to the IPv4 Care-of address when in an IPv4 Access Network.

IETF RFC 5555 [2]

Alternate Care-of Address

C

Used (in addition to the Source address of the IPv6 packet) to carry the IPv6 care-of address when in an IPv6 access network.

IETF RFC 6275 [27]

Binding Identifier mobility option

O

The BID and BID-PRI are set to an arbitrary value.

For registration of a home link, the "H" flag is set to "1" and the value of the CoA field is the Home Address.

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.

IETF RFC 5648 [31], IETF RFC 6089 [32]

Flow Identification mobility option

O

The FID and FID-PRI are set to an arbitrary value.

The Action field is set to indicate the action taken by the receiver of the Binding Update.

The sub-option field conveys the Traffic Selector sub-option.

IETF RFC 6089 [32], IETF RFC 6088 [33]

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.2.2 Binding Acknowledgement

The fields of a BA message for the DSMIPv6 Initial Binding Registration procedure are depicted in Table A.2.2-1.

The Mobility Options in a BA message for the DSMIPv6 Initial Binding Registration procedure are depicted in Table A.2.2-2.

Table A.2.2-1: Fields of a BA message for the DSMIPv6 Initial Binding Registration 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 the binding shall remain valid.

IETF RFC 6275 [27]

Table A.2.2-2: Mobility Options in a BA message for the DSMIPv6 Initial Binding Registration 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. The supporting Status field is set accordingly. Pref-len field is set to "32".

IETF RFC 5555 [2]

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 should 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.

The BID, BID-PRI and "H" flag are set to the value indicated in the BID mobility option of the received Binding Update.

IETF RFC 5648 [31], IETF RFC 6089 [32]

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.

The FID, FID-PRI, Action field and sub-option field are set to the value indicated in the FID mobility option of the received Binding Update.

IETF RFC 6089 [32], IETF RFC 6088 [33]

A.2.3 Binding Error

The fields of a BE message for the DSMIPv6 Initial Binding Registration procedure are depicted in Table A.2.3-1.

Table A.2.3-1: Fields of a BE message for the DSMIPv6 Initial Binding Registration procedure

Fields

Fields Description

Reference

Status

Set to indicate the result.

IETF RFC 6275 [27]

Home Address

The home address that was contained in the Home Address destination option

IETF RFC 6275 [27]