Download E-books IP Networking over Next-Generation Satellite Systems: International Workshop, Budapest, July 2007 PDF

This workshop complaints introduces the newest options and developments in IP-based functions and satellite tv for pc networking. It explains many features of complex satellite tv for pc networking platforms, resembling deployment of IPv6 over satellites, operating with WLAN and WiMax, and ideas pertaining to multi-segment networks. furthermore, the e-book covers hot-button concerns reminiscent of protection, structure development, source allocation, video networking, and repair integration.

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Five Nomadic mobility with SIP Mid-Call Mobility the most mobility factor appears to be like whilst the community swap happens in the course of a verbal exchange (while a consultation is active). thus, the most target is to permit the person to hold on his communications within the new community. to start with, we contemplate that, the cellular node is registered with a “SIP server” positioned in its domestic community. whenever the cellular node adjustments its position, it sends a brand new registration message to its domestic “SIP server”, within the similar approach because the MN sends a registration message (Binding replace) to its domestic agent in cellular IP. while the cellular node strikes in the course of an ongoing consultation, it needs to ship a brand new INVITE message, referred to as re-INVITE, to the correspondent node, utilizing an analogous name identifier as within the unique name. the hot IP deal with has to be installed the touch box of the SIP message, so that the correspondent node is familiar with the place he has to ship the long run messages and within the SDP box to redirect the information site visitors move. besides the fact that, the house handle is utilized in the From box for id. ultimately, the cellular node updates its registration at its domestic “SIP server” so that different calls could be properly redirected, see Fig. five. 6. In either case of mobility (nomadic and mid call), an important factor is the facility to become aware of on the program layer while the IP deal with has replaced. an easy resolution is that the customer polls the OS periodically, however the skill to have purposes being conscious of such alterations are most excellent. five SATSIX Mobility structure and Its functionality review sixty seven Fig. five. 6 Mid name mobility with SIP Multicast and Mobility Multicasting is a prime networking provider in SATSIX, and there's a want for the cellular multicast protocol to permit a cellular node to participate in IPv6 multicast periods irrespectively of its present aspect of attachment. assorted ways The IETF draft [5] discusses 3 diverse methods of mobility extensions to present layer multicast recommendations (listener mobility): (1) distant subscription the place the cellular node joins a multicast crew through a neighborhood multicast router at the international hyperlink by utilizing its Care-of-Address rather than its domestic deal with. – the benefits are: easy process for multicast routing as no aid is required from the community, other than the presence of multicast router in visited networks, and the absence of multicast filtering within the new visited community. – The negative aspects are: in case of widespread MN move, the ensuing common join/leaves to replace the multicast routing tree might suggest major signaling site visitors and doubtless lengthy handover latencies for the MN. (2) domestic subscription the place the cellular node joins the crowd, ship and obtain packets from its domestic Agent throughout the bidirectional tunneling. sixty eight I. Melhus et al. – the benefits are: bidirectional tunneling doesn't require any reconstruction of the multicast tree whereas the multicast receiver is altering its place, as its mobility is obvious to the multicast tree. additionally, no different community help is needed (in specific, multicast router at the visited networks!

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