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

This workshop complaints introduces the most recent thoughts and developments in IP-based functions and satellite tv for pc networking. It explains many points of complex satellite tv for pc networking structures, reminiscent of deployment of IPv6 over satellites, operating with WLAN and WiMax, and ideas bearing on multi-segment networks. moreover, the e-book covers hot-button concerns comparable to defense, structure development, source allocation, video networking, and repair integration.

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This examine offers a downward cross-layering procedure, completed in a keep an eye on airplane, that allows you to provision RBDC assets whilst interactive classes commence. the answer will not be require transformations of layers interfaces or perhaps to the packet headers. certainly, this technique should still reap the benefits of details already integrated inside of consultation signaling messages to supply widespread QoS and consultation info (e. g. bitrate, packet measurement, consultation id), hence hiding the complexity brought via facing the range of multimedia streams. during this learn, we describe a cross-layer procedure utilizing SIP (Session Initiation Protocol)/SDP (Session Description Protocol) to sign consultation start-up and consultation movement info. despite the fact that, this cross-layer method can be utilized with any consultation signaling protocol. This cross-layer method of provision RBDC is split in 3 steps defined now: software established Mapping (First Step) which will do an exact anticipation of assets reservation and request while multimedia consultation starts off, we have to recognize the volume of assets required by means of 82 F. Nivor et al. this consultation. We additionally want to know the ST Identifier, at the back of which the consultation begins, within the satellite tv for pc community. even if, info built-in in consultation protocols can't be without delay used to accomplish this source provisioning. Then, this proposed first step is composed in translating program established info (i. e. consultation protocol syntax) right into a normalized illustration of this knowledge (e. g. program kinds, codec names). through the SIP institution section, the SIP person brokers (UAs) trade and negotiate the kind of program, media and codec that's used in the course of facts move of the consultation. SIP proxies course requests to UAs simply because they're at the beginning no longer conscious of their respective situation. figuring out that the gateway (GW) represents the access element of the satellite tv for pc community, we recommend to put in an Outbound SIP Proxy (OSP) in the GW/NCC. This entry topology permits the OSP to intercept all SIP institution messages (SIP INVITE). A keep watch over airplane is then used to retrieve from those consultation messages, the appliance and media kinds in addition to the codec identify. a primary translation towards well-known program media and codec identify is finished if wanted. when it comes to SIP/SDP protocols, audio and video formats used in the course of consultation institution are standardized by means of the IANA association [12]. To make source reservation for multimedia movement, we additionally want the ST MAC Identifier in the back of which the consultation is initiated. with a view to receive this identification, we additionally use info from institution consultation messages. The keep an eye on aircraft on the OSP is accountable to extract the IP tackle and port of UAs. From this delivery info, we advise to take advantage of the SARP protocol (Satellite deal with answer Protocol) to retrieve the ST identity giving entry to the UA IP deal with within the satellite tv for pc community. The keep an eye on airplane retains tune of the SIP consultation identity linked to the ST identification. From consultation Description towards detailed QoS Parameters (Second Step) step one presents normalized consultation info in particular on software, media kinds, codec names and ST Identifier linked to the consultation.

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