• IEEE 802.21 MEDIA INDEPENDENT HANDOVER

• DCN: 21-06-0602-00-0000

• Title: PoA Capabilities of IE with IPv6 Prefix Availability

• Date Submitted: May 2006

• Authors or Source(s): Soohong Daniel Park

• Abstract: This document proposes a new value to be included into PoA Capabilities of IE to allow mobile node to sense its PoA’s IPv6 prefix availability.

IEEE 802.21 presentation release statements

•This document has been prepared to assist the IEEE 802.21 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 802.21.

•The contributor is familiar with IEEE patent policy, as outlined in Section 6.3 of the IEEE-SA Standards Board Operations Manual <http://standards.ieee.org/guides/opman/sect6.html#6.3> and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/guide.html> 

Higher layer services and information IEs

• What we already have: TYPE_IE_POA_SUBNET_INFORMATION (per PoA)

TYPE_IE_POA_CAPABILITIES (per PoA) Security Available (Y/N) QoS Available (Y/N) Emergency Service Available (Y/N) Others

• Consensus to increase IE’s utilities were made by Higher Layer IE Adhoc at Denver meeting.

PoA Capabilities

• It defines bitmap of PoA capabilities such as;• Bit 0: Security (Y/N)• Bit 1: QoS (Y/N)• Bit 2: Internet Access (Y/N)• Bit 3: IP Version 4 (Y/N)• Bit 4: IP Version 6 (Y/N)• Bit 5: Emergency Services (Y/N)• Bit 6-31: Reserved

• “Bit 4-IPv6 Version 6” is not enough for mobile node to recognize a PoA capability in terms of IPv6 because of lack of IPv6 prefix available bits. • To reduce network bandwidth (especially wireless environment), network administrator turns off IPv6 prefix delegation (or does not configure IPv6 prefix on the default router). It is a general case in terms of IPv6 network configuration.

• Router Advertisement contains zero or more prefix information (described in RFC 2462)

A new bit of PoA Capabilities

Type Description Length Value

TYPE_IE_POA_CAPABILITIES

PoA Capabilities 4 octets PoA Capabilities bitmap

Bit 0: Security Y/N

Bit 1: QoS Y/N

Bit 2: Internet Access Y/N

Bit 3: IP Version 4 Y/N

Bit 4: IP Version 6 Y/N

Bit 5: IP Version 6 Prefix Available Y/N

Bit 6: Emergency Services Y/N

Bit 7-31: Reserved

6.3.4.3.6 PoA Capabilities (for each PoA of Access Network + Operator combination)

Applicable operation

• If mobile node receives “IP Version 6 Prefix Available (N)” from PoA-1• Preparing DHCPv6 when attaching to PoA-1• Not soliciting any IPv6 Router Solicitation to PoA-1

• Reducing RS/RA delay