"PUBLISH with soft-state has a life time associated with it.". I am rephrasing this, PUBLISH always has life time associated with the soft-state it carries.
On Mon, Apr 7, 2008 at 11:33 AM, Vikram Chhibber <[EMAIL PROTECTED]> wrote: > Nitin, PUBLISH with soft-state has a life time associated with it. If > Server detects that there is expiration of this duration, it can > assume the user is off-line. The problem is that the Server needs to > wait for the publish expiration to conclude. The server may like to > decrease the refresh rate to avoid long publish life-time. Other way > is use some device audit technique like using OPTIONS, the server can > pole the availability of the PUA. > > You may like to couple registration with presence but again the > registration has the same problem as PUBLISH as the client will not be > able to un-register if it is not turned-off gracefully and this > technique assumed that the registrar and presence-server are somehow > able to communicate. > > http://www.veraznetworks.com > ~Vikram > > > On Mon, Apr 7, 2008 at 11:14 AM, Nitin Arora <[EMAIL PROTECTED]> wrote: > > Hi, > > > > I am working on a presence client and using SER as presence server. > > I am using PUBLISH to publish my presence status (i.e. online, offline, > away > > etc.) to the sever, and using SUBSCRIBE, NOTIFY to know the status of the > > UAs in my friend's list. > > > > Now my problem is what if my UA is turned off and unable to send PUBLISH > to > > update its presence status. is there any way to get rid of this problem. > > > > one way I can think of is that Server will check for the registration > status > > of that UA and on registration expiration it will automatically change the > > presence status to offline, but what if registration period is too long, > its > > presence status will be kept like orphan on the proxy. > > > > second way is that UA itself periodically update the status through > PUBLISH > > but I don't know if any IETF standard defines or recommends this and if > such > > rfc exists then Does SER (Proxy) supports it or not? > > > > Please share any opinion. > > > > Thanks & Regards > > Nitin Arora > > _______________________________________________ > > Sip-implementors mailing list > > [email protected] > > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > > > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
