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					• IEEE 802.21 MEDIA INDEPENDENT HANDOVER
• DCN: 21-06-0570-01-0000
• Title: Higher layer services and information IEs
• Date Submitted: March 2006
• Authors or Source(s): Qiaobing Xie for Higher Layer Services
  and information IE ad-hoc Team
• Abstract: This document describes the background and meeting
  summary of 802.21 Higher Layer Services and information IE
  ad-hoc session (held on 2/14/06), and provides a base for
  continued discussion on this topic.
      IEEE 802.21 presentation release statements
• This document has been prepared to assist the IEEEthe contributing individual(s) or
  offered as a basis for discussion and is not binding on
                                                          802.21 Working Group. It is
    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
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    IEEE-SA              Standards            Board            Operations           Manual
    <http://standards.ieee.org/guides/opman/sect6.html#6.3> and in Understanding Patent
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    http://standards.ieee.org/board/pat/guide.html>
   Higher layer services and information IEs
• What we already have:
    IP subnets (per PoA)
    PoA capabilities bitmap (per PoA)
             Security Available (y/n)
             QoS Available (y/n)
             Internet Access Available (y/n)
             IP Version 4 supported (y/n)
             IP Version 6 supported (y/n)
             Emergency Services available (y/n)
             Others
• Newly proposed (and summary of 2/14/06 discussion):
    IP address configuration method supported (per PoA?)
             Discussed. Need more clarification about the definition and use cases. No conclusion
              reached.
       DHCP address (per PoA or per AN?)
             Discussed. No conclusion reached about the necessity and usefulness of this IE. No
              conclusion about how to relate it to the current DHCP protocol.
       AAA address (per PoA or per AN?) not discussed.
       Others? Not discussed.
       Chair agreed to continue the discussion at another ad-hoc at March f2f
        meeting
      Common motivation for these new IEs?
• If a handover between two access networks requires tearing down the
  current IP connectivity and re-establish a new one to the target network, this
  may cause significant delay due to the slow IP parameter negotiation
  procedures required by some IETF protocols.
• Can we utilize MIH IS to get some IP configuration information before a
  handover, so that the upper layer could predicatively plan for or establish the
  IP connectivity (or part of it) to a potential target network?

     Do   we have a consensus that this is a valuable capability to have?
       there other mechanism that exists and is better suited for this than
     Is
      MIIS?
     Are   the proposed IEs the right ones for this purpose?
     What   is the best way to define the IEs?
          How to incorporate the new IEs (Option 1)
Option 1: Add them in parallel to the existing IEs in Table 6 under per PoA
    higher layer services/info. For example:


               Name of
                                                                             Length
      No     Information           Description              Representation
                                                                             (octets)
               Element

    4.3     TYPE_IE_POA_IP   IP address configuration   bitmap
            _CONFIG_METH     method supported
            ODS


    4.4     TYPE_IE_POA_     DHCP address               IP address
            DHCP_ADDR



    4.5     TYPE_IE_POA_     AAA address                IP address
            AAA_ADDR
           How to incorporate the new IEs (Option 2a)
Option 2a: Add them to the existing POA capabilities IE in Table 6 (of cause we no
    longer can use the bitmap representation):


                Name of
                                                                                     Length
      No      Information      Description            Representation
                                                                                     (octets)
                Element

     4.2     TYPE_IE_POA_    A list of PoA    Security Available          Y/N        variable
             CAPABILITIES    capabilities     QoS Available               Y/N
                                              Internet Access Available   Y/N
                                              IP Version 4 supported      Y/N
                                              IP Version 6 supported      Y/N
                                              Emergency Services           Y/N
                                              IP Address config methods    bitmap
                                              DHCP address                 IP addr
                                              AAA address                  IP addr
                                              (Others)
         How to incorporate the new IEs (Option 2b)
Option 2b: Should there be an Access Network specific capabilities IE in Table 6?



              Name of
                                                                                 Length
    No      Information       Description             Representation
                                                                                 (octets)
              Element

   2.7     TYPE_IE_AN_     A list of AN      IP Address config methods bitmap    variable
           HIGH_LAYER_     higher layer      DHCP address              IP addr
                           capabilities      AAA address               IP addr
           CAPABILITIES

   4.2     TYPE_IE_POA_    Bitmap of PoA     Security Available          Y/N
           CAPABILITIES    capabilities      QoS Available               Y/N
                                             Internet Access Available   Y/N
                                             IP Version 4 supported      Y/N
                                             IP Version 6 supported      Y/N
                                             Emergency Services           Y/N
                                             (Others)

				
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