IP Networking over Next-Generation Satellite Systems: International Workshop, Budapest, July 2007
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This workshop proceedings introduces the latest innovations and trends in IP-based applications and satellite networking. It explains many aspects of advanced satellite networking systems, such as deployment of IPv6 over satellites, working with WLAN and WiMax, and rules concerning multi-segment networks. In addition, the book covers hot-button issues such as security, architecture improvement, resource allocation, video networking, and service integration.
same VSN. Thus a NATed H.323 terminal is able to perform H.323 voice/video calls even if the subscriber RCST NAT does not support a H.323 ALG. 22 M. Catalán de Domingo et al. Internet/Intranet Access improved Using PEP Protocol in Mesh and Star Configurations The purpose of the TCP/IP enhancement functionality is to speed up TCP connections over a large latency satellite link. The functionality can be used for both TCP connections between terminals and TCP connection between terminals and
OSP receives the SIP OK message, we propose to keep it within the OSP until the TBTP is emitted by the NCC; it’s equivalent at user level to let the call ringing (one super-frame = 530 ms at most). So the OSP emits an RBDC capacity request to the NCC. Then, when the TBTP is being broadcasted on the forward link, the NCC emits upwards an acknowledgment to the OSP, indicating that the TBTP is about to be sent. Consequently, the OSP releases the authorized SIP OK message; thus, the SIP message and
and return links. However, for strongly asymmetric applications (such as broadcasting, VoD, cinema distribution) QoS would make sense only on the forward link. Nevertheless, the degree of asymmetry is considered a factor in network dimensioning on the forward and return links. To fully understand the different applications requirements and the constraints on bandwidth and delay associated, we will consider the applications behaviour with respect to five characteristics: ● ● ● ● ● Delay
Proxies router User terminal C2P server IDU - MAC Access part RCST IDU - IP part QoS ARC + CAC Applications RRM QoS aware SIP sig SIP client QoS demand QoS unaware QoS Agent SIP sig SIP Proxy QoS Server QoS LPEP C2P agent Cnx info MLD adapter QoS demand HA / MLD proxy for mobility RRM Configuration Traffic flows QoS IP QoS Marking Queuing Shaping Scheduling PEP QoS LPDP IP QoS MF classification & marking (remarking) Shaping / policing / droping Scheduling IP
with less participants (< 6). Webcast for Corporate Services These trials provided Web-based Corporate oriented services, including a wide range of functionality for synchronous and asynchronous modes with low or high interactivity. They were tested in a meshed scenario. The applications supported are: ● Live events. The audio and video was multicasted from the teacher RCST and received in all the terminals in a synchronized way, using a stream rate of 300 Kbps. PowerPoint slides were also