Selon "Manfredi, Albert E" <[EMAIL PROTECTED]>: > I think Pars' point is not restricted to L2 mechanisms, though. No > matter what layer has to wake up a dormant host, bandwidth will be > consumed at multiple base stations to achieve this? >
Yes that's right. Thanks! pars > Bert > > > > -----Original Message----- > > From: James Kempf [mailto:[EMAIL PROTECTED] > > Sent: Wednesday, September 20, 2006 3:03 PM > > To: Pars MUTAF > > Cc: Erik Nordmark; [email protected] > > Subject: Re: Proposal to change aspects of Neighbor Discovery > > > > So here's a counter example. > > > > Suppose there is an IP based but wireless link layer specific > > protocol that > > lets BSes communicate about dormant mode hosts. When a host goes into > > dormant mode, all BSes in the paging area learn about it via > > the protocol. > > When paging happens, this protocol is used by the BS where > > the mobile node > > originally went into dormant mode to notify other BSes to > > page. Etc. That > > should take care of filtering. > > > > Right now, paging is handled by L2 specific mechanisms. In > > 3GPP, I think it > > even depends on the MSC, i.e. the circuit switched part of > > the network. > > Bottom line is, other SDOs get to say how it works, not the IETF. > > > > jak > > > > > > > > ----- Original Message ----- > > From: "Pars MUTAF" <[EMAIL PROTECTED]> > > To: "James Kempf" <[EMAIL PROTECTED]> > > Cc: "Erik Nordmark" <[EMAIL PROTECTED]>; <[email protected]> > > Sent: Wednesday, September 20, 2006 12:49 PM > > Subject: Re: Proposal to change aspects of Neighbor Discovery > > > > > > > Selon James Kempf <[EMAIL PROTECTED]>: > > > > > >> There is an assumption here that the "L2 paging system" is > > run off the > > >> AR. > > >> This is not necesarily the case. It won't be for Wimax, > > for example. > > > > > > Hello, > > > OK. The discussion about Wimax now ;-) > > > > > > But this should be orthogonal to our problem. In paging, in general, > > > the system (AR in this case) doesn't know where the dormant host is > > > located. The mobile host is "asked" to report its exact location, > > > i.e. cell. (This is what is meant by "paging"). > > > > > > *The BSs don't know anything about the dormant host*. The > > host is paged > > > in all cells of the paging area. That's why wireless > > bandwidth needs to be > > > consumed for paging in all cells of the paging area. (This > > is a well-known > > > problem of paging. 100s of research papers attempted to reduce this > > > bandwidth cost.) > > > > > > Then, the host hears the paging message while sleeping in one of > > > the cells, wakes up, and a location update is sent. > > > > > > The AR has now learned the current BS of the host. The packet that > > > triggered paging is forwarded to the current BS of the host. > > > > > > Filtering of the RA by the BS is too late. Because the host was > > > already paged in all cells and woken up. > > > > > > pars > > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > [email protected] > Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- > ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
