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IP Wireless Access in Vehicular Environments (Active WG)
Int Area: Suresh Krishnan | 2016-Oct-18 —  

IETF-104 ipwave minutes

Session 2019-03-29 1050-1250: Berlin/Brussels - Audio stream - ipwave chatroom


minutes-104-ipwave-01 minutes

          IPWAVE WG meeting at IETF 104
          FRIDAY, 29 March 2019 at 10:50-12:50, Athens/Barcelona
          Chairs: Russ Housley, Carlos J. Bernardos
          Minute takers: Jaehoon Paul Jeong
          Jabber scribe: Russ Housley
          10:50 Administrativia  .......................................... 10 min
                Presenter: IPWAVE WG Chairs
          Carlos introduces the meeting, and the etherpad will be used for notes.
          WG progress is behind the milestone, so we need to speed up.
          The IPv6 over 802.11-OCB document got comments from IntDir and IoTDir.
          After the IPv6 over 802.11-OCB and Problem Statement documents are done,
            other work can be considered for a recharter.
          IPWAVE Problem Statement document is revised to address the reviews by
            Charlie and Sri.
          During this meeting, the focus will be on the two WG documents.
          ** HACKATHON report
          11:00 Implementing IPWAVE Basic Protocols  ...................... 20 min
                    Presenter: Jaehoon Paul Jeong
          Paul Jeong (PJ) presents: We participated Hackathon to show the concept
            of our WG drafts.
          We want to make sure the IPv6 over OCB mode works well.
          We also implemented multihop DAD.
          Several people joined this Hackathon project.
          The figure in the slides shows the basic Vehicular Network Architecture.
          Vehicles can talk with other vehicles, and also communicate with RSUs.
          A vehicle can configure its IPv6 address by the prefix from an RSU.
          Safety case: V2V communication should be used.
          We consider a multiple-link subnet model; it is a possible solution.
          MA is in charge of mobility information for multiple vehicles.
          We try to reduce the standard DAD overhead.
          We use two simulators, SUMO and Veins.
          SUMO provides mobility information.
          Vehicle structure enables IPv6 access.
          Support both a WAVE stack and a TCP/IP stack, using 802.11 in OCB mode.
          Open source code was posted in GitHub.
          Sri Gundavelli (SG): Your implementation is in simulator?
          PJ: We implemented it in the simulator, not the linux kernel.
          SK: In the simulator, you implement this process?
          PJ: Simulations are the proof-of-concept work.  Hope in the future, we
            can continue work on the topic.
          Carlos Bernardos (CB): I understand that you implemented one of your
            proposed drafts.  This is useful, but at this stage, we need feedback
            from experimentation with the IPv6 over OCB document.  Did you
            experience any issue with that?
          Chris Shen (CS): We implemented IPv6 over OCB, and no issues were found.
          PJ: This hackathon implemented IPv6 over OCB for Ethernet Adaptation
            Layer and Vehicular Neighbor Discovery.
          ** IPWAVE WG documents
          11:20 Transmission of IPv6 Packets over IEEE 802.11 Networks  ... 20 min
                in mode Outside the Context of a Basic Service Set
                   Presenter: Alex Petrescu
                   Draft: draft-ietf-ipwave-ipv6-over-80211ocb-34
          Alex Petrescu (AP): We implemented IPv6 over OCB in real cars, and we
            demonstrated it for POC with the V2V of three cars.
          ETSI (TC ITS) will take advantage of IPWAVE for IP-based V2X
          This draft was revised from -31 to -34:
           - Handover behavior is clarified;
           - Clarification of MAC address privacy example;
           - The section about ND is simplified;
           - Improvement of handover with MIPv6 and DNAv6;
           - Improvement of ND retransmissions in respect to packet loss; and
           - Appendix of channel use is added.
          SG: DNAv6, is it dead?
          Suresh Krishnan (SK): It is an RFC; it is not dead.  There are some
            implementations with some variations of it.
          IoTDir and IntDir Reviews questioning the Ethernet Adaptation Layer as
            AP bridging Ethernet to WiFi?
              - IPv6 over OCB does not bridge between these interfaces; and
              - It bridges between layers (Ethernet/WiFi layer and IP layer).
          Pascal Thubert (PT): IPv6 over OCB can refer to 6lo for optimizations.
          SK: Optimization like 6lo's work can be left as future work.
          SG: OCB draft should refer to the classical ND document.
          CS: IPWAVE hackathon project used packet framing of 6lo for OCB packet.
          Dorothy Stanley (DS): OCB document should be done with the classical ND,
            and it will be improved later by IPWAVE hackathon projects.
          CB: The way forward is for the OCB document proposes basic ND but
            document the shortcomings, leaving "enhanced" ND for a separate
            work.  The OCB document will reflect Pascal's comments and it will
            move forward.
          AP: Comments from the 6man WG were circulated without improvement.
          SK: The authors need to clarify the text with questions from reviewers
            even though the implementation shows the correct mechanism of IPv6
            over OCB.
          AP: Let's make progress through IESG for RFC publication.
          AP: I will try to improve security considerations; however, the security
            is not easy to solve.
          SK: The authors need to specify possible problems and say how to
            mitigate them.
          AP: It is very hard to address all security problems in this document.
          DS: Security part can refer to IEEE 1609.2 security.
          SG: What security aspects are discussed such as link layer and
            application layer?
          SK: We need to document security issues.
          William Whyte (WW): There are many ETSI documents about security issues
            and threat models.  We can just point to them.
          Tony Li (TL): Link layer security is out of our scope.  We don't have a
            decent security method in network layer yet.
          11:40 IP Wireless Access in Vehicular Environments (IPWAVE):  ... 20 min
                Problem Statement and Use Cases
                    Presenter: Jaehoon Paul Jeong
                    Draft: draft-ietf-ipwave-vehicular-networking-08
          PJ: I am one of the editors of this Problem Statement (PS) document.  I
            clarified key work items in this PS document, such as ND, mobility
            management, security and privacy.  I summarized the solutions, and
            talk about the link model.
          This is vehicular network architecture.
          A vehicle can configure its IP address through this multi-link model.
          We need to provide Internet access using a global IP address.
          We also suggest the multihop ND.
          Mobility Management has two cases for seamless communicaiton and the
            timely data exchange between.
          First case is PMIPv6 based mobility management.  Trajectory information
            allows mobility management to be done proactively.
          DMM based can also be used.
          Next step, wrap up this PS document.
          CB: Have been all of the received comments been addressed?  You need to
            tell the reviewers how their comments were handled.  Please post to
            the mail list so that the reviewers can check if they think their
            comments have been addressed.
          SG: Stick to the problem statement, not solution.
          CB: The review from Sri was posted beginning of February, and then an
            updated draft was posted after the cutoff date for this meeting.  If
            the authors want to progress this document, responding to review
            cannot take that long, and for sure cannot be submitted after the
            cutoff.  Next revision has to be done well before Montreal meeting.
          PJ: I will address further comments from the WG quickly.
          ** Additional topics (time permitting)
          12:00 IPv6 Vehicular Neighbor Discovery ......................... 15 min
                   Presenter: Yiwen Chris Shen
                   Draft: draft-jeong-ipwave-vehicular-neighbor-discovery-06
          CS mentioned that there is IPR related to this draft.
          CS explained vehicular network architecture with vehicular link model.
          Based on the network, vehicular neighbor discovery (VND) uses address
            registration for efficient address configuration and management.
          SG: How does it handle MAC pseudonym?
          CS: We will address the pesudonym later.
          WW: Coupling between network layer and transport layer should be
            considered for efficient pseudonym.
          CS: Aquisition of prefix can be done to a vehicle far away from RSU
            via VANET.
          Prefix and service discovery can be efficiently by VND with ND options.
          Updates from -05 are specified such as shared prefix model.
          CB: There cannot be any WG adoption on this (or any other document)
            without rechartering. And there will be no rechartering process until
            the two documents on the current charter are done.
          Erik Nordmark (EN): 6lowpan document is used. What is different from
            6lowpan?  What are missing from it?
          SG: Need analysis before WG adoption.
          AP: In procedure of address registration, does this VND override the
            classical ND?  Can a vehicle have multiple IP addresses?
          SG: Does this draft consider internal IP addresses along with egress
            (or external) IP address?
          TL: Is Private IP address space considered?
          CS: This is related to mobility management.
          12:15  Urban Air Mobility Implications for IPWAVE   ............  10 min
                    Presenter: Fred Templin
                    Draft: draft-templin-ipwave-uam-its-00
          Fred Templin (FT) explains the motivation and requirements of Urban Air
          Mobility (UAM) in IPWAVE. UAM can use DSRC and C-V2X for communications.
          PJ: This UAM can be considered as work item after rechartering.
          SG: Is UAM proposed as IPWAVE work item or a requied work for your
          12:25  IEEE 1609.2/ETSI TS 103 097 certificates in TLS 1.3  ..... 10 min
          WW introduces TLS authentication using certificates in the format
            defined in ETSI ITS and IEEE WAVE.  The objective is to enable
            client/server authentication these certificates.  TLS WG has no
            interest, so WW proposes the work in IPWAVE WG.
          12:35  Mobility Management for IP-Based Vehicular Networks  ..... 10 min
                    Presenter: Jaehoon Paul Jeong
                    Draft: draft-jeong-ipwave-vehicular-mobility-management-00
          PJ: This draft offers a vehicular mobility management scheme for IPv6
            vehicular networks that takes advantage of a vehicular multi-link
            subnet model.  With a vehicle's position, speed, direction, and
            trajectory, it can provide a moving vehicle with proactive and
            seamless handoff along its trajectory.
          CB: There cannot be any WG adoption on this (or any other document)
            without rechartering. And there will be no rechartering process until
            the two documents on the current charter are done.
          Someone suggested the review of RFC 4903, where Dave Thaler describes
            issues with multi-link subnets.

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