rfc3002.txt

Overview of 2000 IAB Wireless Internetworking Workshop

      Title: Overview of WAP

      Presenter: Alastair Angwin

      Reference:
           http://www.iab.org/IAB-wireless-workshop/talks/iab-wap-1.pdf

      Overview:

      Title: Mobile Wireless Internet Forum (MWIF)

      Presenter: Alastair Angwin

      Reference:
           http://www.iab.org/IAB-wireless-workshop/talks/MWIF_TC
           _Presentation.PDF,
           http://www.iab.org/IAB-wireless-workshop/talks/MWIF_TC
           _Presentation.ppt

      Overview:

      Title: Some WAP History

      Presenter: Jerry Lahti

      Reference:
           http://www.iab.org/IAB-wireless-workshop/talks/waphist.PDF,
           http://www.iab.org/IAB-wireless-workshop/talks/waphist.ppt

      Overview:

      Title: Near-space Wireless Applications

      Presenter: Mark Allman

      Reference:
           http://www.iab.org/IAB-wireless-workshop/talks/allman-iab-
           wireless.pdf,
           http://www.iab.org/IAB-wireless-workshop/talks/allman-iab-
           wireless.ps

      Overview:



Mitzel                       Informational                      [Page 6]

RFC 3002                 IAB Wireless Workshop             December 2000


      Title: Air Traffic / Aviation Wireless

      Presenter: Chris Wargo

      Reference:
           http://www.iab.org/IAB-wireless-workshop/talks/wargo-talk.PDF,
           http://www.iab.org/IAB-wireless-workshop/talks/wargo-talk.ppt

      Overview:

      Title: VoIP over Wireless

      Presenter: Christian Huitema

      Reference:
           http://www.iab.org/IAB-wireless-workshop/talks/iab-wless-
           voip.PDF,
           http://www.iab.org/IAB-wireless-workshop/talks/iab-wless-
           voip.ppt

      Overview:

      Title: Security Issues in Wireless Networks and Mobile Computing

      Presenter: N. Asokan

      Reference:
           http://www.iab.org/IAB-wireless-workshop/talks/mobile-secu-
           rity.PDF,
           http://www.iab.org/IAB-wireless-workshop/talks/mobile-secu-
           rity.ppt

      Overview:

      Title: Security for Mobile IP in 3G Networks

      Presenter: Pat Calhoun

      Reference:
           http://www.iab.org/IAB-wireless-workshop/talks/mip-sec-3g.PDF,
           http://www.iab.org/IAB-wireless-workshop/talks/mip-sec-3g.ppt

      Overview:

      Title: On Inter-layer Assumptions (A View from the Transport Area)

      Presenter: Mark Handley




Mitzel                       Informational                      [Page 7]

RFC 3002                 IAB Wireless Workshop             December 2000


      Reference:
           http://www.iab.org/IAB-wireless-workshop/talks/handley-
           wireless.pdf,
           http://www.iab.org/IAB-wireless-workshop/talks/handley-wire-
           less.ps

      Overview:

      Title: Does current Internet Transport work over Wireless?

      Presenter: Sally Floyd

      Reference:
           http://www.iab.org/IAB-wireless-workshop/talks/IAB-wireless-
           Mar00.pdf,
           http://www.iab.org/IAB-wireless-workshop/talks/IAB-wireless-
           Mar00.ps

      Overview:

      Title: QOS for Wireless (DiffServ, IntServ, other?)

      Presenter: Lixia Zhang

      Reference:
           http://www.iab.org/IAB-wireless-workshop/talks/zhang-feb-
           IAB.PDF,
           http://www.iab.org/IAB-wireless-workshop/talks/zhang-feb-
           IAB.ppt

      Overview:

      Title: Do current WWW Protocols work over Wireless and Small
           Screen Devices?

      Presenter: Gabriel Montenegro

      Reference:
            http://www.iab.org/IAB-wireless-workshop/talks/wireless-
            www.PDF,
            http://www.iab.org/IAB-wireless-workshop/talks/wireless-
            www.ppt

      Overview:

      Title: Compression & Bit Error Requirements for Wireless

      Presenter: Mikael Degermark



Mitzel                       Informational                      [Page 8]

RFC 3002                 IAB Wireless Workshop             December 2000


      Reference:
           http://www.iab.org/IAB-wireless-workshop/talks/iab-hc.PDF,
           http://www.iab.org/IAB-wireless-workshop/talks/iab-hc.ppt

      Overview:

      Title: Addressing Requirements for Wireless Devices & IPv6

      Presenter: Bob Hinden

      Reference:
            http://www.iab.org/IAB-wireless-workshop/talks/Addressing-
            IPv6.PDF,
            http://www.iab.org/IAB-wireless-workshop/talks/Addressing-
            IPv6.ppt

       Overview:

3 Discussion and Observations

   During the workshop presentations a number of issues were discussed
   and observations made.  The following sections 3.1 -- 3.12 summarize
   these discussion and observations.  Rather than organizing the
   material linearly by presentation, it is grouped according to common
   "themes" and issues.

3.1 Discussion on "Walled Garden" Service Model

   Presentations from members involved in the cellular wireless (3GPP,
   3G.IP, MWIF) and WAP environments quickly illustrated a significant
   difference in protocol specification and service models from that
   typically assumed by the Internet community.  These communities focus
   on defining a profile (set of protocols and operational parameters)
   that combine to provide a well defined user service.  In addition,
   the carriers typically prefer to have complete (or as much as
   possible) control over the entire service, including user access
   device, transmission facilities, and service "content".  This style
   of service model appears to have been inherited from the classic
   telephony provider model.  The term "walled garden" was coined to
   describe the resulting captive customer economic and service model.
   That is, the user is constrained within the limits of the service
   provided by the carrier with limited ability to extend features or
   access services outside the provider.           The "walled garden"
   service model is in stark contrast to the "open" service assumed in
   the Internet.  The application, access device, and service content
   may each be controlled by a different entity, and the service
   provider is typically viewed as little more than a "bit pipe".




Mitzel                       Informational                      [Page 9]

RFC 3002                 IAB Wireless Workshop             December 2000


   Additionally, specification typically define a standalone protocol or
   application rather than the set of features and interoperation with
   other components required to deploy a commercial service.

   Some discussion focused on whether cellular carriers could be
   persuaded to transition toward the Internet "open" service model.
   Responses indicated that there was little hope of this as carriers
   will always fight being reduced to a "bit pipe", fearing they cannot
   sustain sufficient revenues without the value added services.  An
   additional point raised was that the closed model of the "walled
   garden" simplifies a number of issues, such as security,
   authorization, and billing when the entire network is considered
   secured and controlled under a single administration.  These
   simplification can eliminate roadblocks to service deployment before
   scalable, interdomain solutions are available.

   Even though there seems little hope of evolving carriers away from
   the "walled garden" service in the short term, there was significant
   value in recognizing its presence.  This led to observations that
   "walled garden" Internet-based services will operate somewhat like
   current intranet services.  Also, mechanisms should be investigated
   to simplify interoperation and controlled access to the Internet.
   Finally, the difference between Internet protocol specification
   contrasted to service profiles highlights some of the confusion those
   in the telephony environment encounter when attempting to incorporate
   Internet capabilities.

   Much of the current work in extending Internet-based services to
   cellular customers has focused on data services such as email or web
   access.  One observation on the reluctance of carriers to release any
   control over services was that this may be an impediment to adoption
   of Internet-based voice services.  Current work on voice over IP
   (VoIP) and call signaling (SIP [30]) loosens control over these
   services, much of the functionality is moved into the SIP agent with
   the carrier being reduced to an access provider (i.e., "bit pipe").

3.2 Discussion on Mobility and Roaming

   An inherent characteristic of wireless systems is their potential for
   accommodating device roaming and mobility.  Some discussion focused
   on the model of mobility presented to the user.  There was also
   considerable interest and discussion on protocols employed, using
   cellular telephony and/or IP-based solutions.  Finally, there was
   some interest in exploring new services enabled by mobility.







Mitzel                       Informational                     [Page 10]

RFC 3002                 IAB Wireless Workshop             December 2000


3.2.1 Discussion on Mobility and Roaming Model

   There was considerable discussion and concern over what style of
   mobility and roaming needs to be supported.  Current usage in the
   Internet is dominated by the mode where a user performs some actions
   at one location, then shuts down and moves, followed by restart at a
   new location.

   3G.IP uses the term "macro mobility" to describe this mode.

   The discussion attempted to discern whether the current mode of usage
   is a perceived limitation introduced by current protocols.  A clear
   consensus could not be achieved.  There was agreement that
   introduction of this "macro mobility" roaming is a worthwhile first
   step.  However, that was immediately followed by questions on whether
   it is a sufficient first step, and warning not to stop at this level.