February-2006 21-05-0559-00-0000

IEEE P802

Media Independent Handover Services

Teleconference Meeting Minutes of the IEEE P802.21 Working Group

ES/CS L3 requirements Ad Hoc

Telecon Hosted: Srinivas Sreemanthula

Minutes taken by Srinivas Sreemanthula

Date: Thursday, February 16th, 2006, 9:00AM-11:00AM EDT

  • Srini went over the agenda and discussion points for the meeting
  • Srini provided a MIH registration overview.
  • Ajay: This mechanism seems have dependency for authentication and third party involvement. There could also be mismatch in security parameters
  • Kalyan: There is also accesss network authentication, do we need mih authentication?
  • Srini: Yes, but MIH may not be in the access network or the visited network
  • Ajay: There are primarily two issues with registration
  • I) authentication
  • Ii) mobility
  • Kalyan: Do we need more than MIHF-ID for authentication purposes?
  • Sriini: Usually you need some additional parameters for carrying authentication depending on the algorithm. But it is outside the scope of 802.21
  • Ajay: If MIH is in PoA then network access authentication can be applied for MIH
  • Srini: Yes, that is a limited case but MIH may not be located in the PoA.
  • Eunah: Why do we need registration?
  • Srini: We have agreement we need registration. Basically, it creates pairing that will enable exchange of MIH communications like ES/CS built upon security mechanisms. But the security mechanisms are not within 802.21. I could provide more background in an offline discussion since this telecon is for defining the specifics of registration function.
  • Subir: Do we need security mechanisms within 802.21
  • Kalyan: There is no such implication
  • Ulises: There is no need for security discussion here. Let's take tne security discussion outside of the registration concept.
  • Srini: Agreed
  • Ajay: But there is a dependence on registration. It may be important to say what it is in the draft specification. Especially when the terminal supports something while the network supports something else.
  • Srini: 802.21 does not do it. It means someone like IETF will define the interoperability, no issue there. What we are saying is 802.21 doesn't need to do it.
  • Yoshi: I agree with this
  • Ajay: ES/CS will be treated without security implication, is this true for IS also? We have not discussed yet.
  • Srini: Among the issues related to registration, authentication or security is agreed to be out of scope. Can we discuss the next item, mobility?
  • Ajay: Yes, the main problem is that MIH could be in PoA and mobility could result in reregistration at the new PoA which would create an anchor.
  • Srini: The word "anchor" is used more for dataplane context, there is not such thing anchor here
  • Ajay: It could also be for control plane
  • Ulises: I agree it is mostly for data plane, but the context of moblility is mainly implementation specific
  • Ajay: Not necessarily, unless you say only non-PoA cases are considered.
  • Srini: We don't have to consider that way, but if you think of 802.21 handovers are more make-before-break then there is a possibility that the old-PoA is still accessible soon after handover and re-registration, if needed, is not in the critical path.
  • Ajay: I agree that make-before-break mechanisms are applicable and it reduces the mobility cases to some extent.
  • Ulises: But there could also be idle mobility cases …
  • Srini: Agree, it just adds some load but there is something we can derive from current cellular architectures
  • Ajay: We may need some context transfer is re-registration is not requited.
  • Srini: Context transfer can be done if actually needed, but there are cases like network boundary where the context transfer does not work.
  • Ulises: There is a concept of routing area in cellular networks.
  • Ajay: I am not sure we should do it that way.
  • Srini: Agreed we need to put some thought to idle mobility.
  • Srini: Almost closing time. We could not discuss about MIH ack but we should continue that in email.

Attendees

(More may have attended. Please send updates to Chair)

Srinivas Sreemanthula

Benjamin Koh

Eunah kim

Subir Das

Kalyan Koora

Yoshi Ohba

Andrew McDonald

Minutes page 1