The L*IP Satellite System developed by Joanneum Research and Graz University of Technology is a communication product hand-tailored for the Internet Protocol and its real time and non-real time applications. Video, voice and data applications can be supported via this network.
Meshed systems like the L*IP avoid the drawbacks of star topology networks, i.e., it satisfies the requirements of real-time services with only a single hop. The available satellite bandwidth is used in an optimum fashion via QoS-aware DAMA control which balances the bandwidth for all the users in the uplink as well as in the downlink. The L*IP system encapsulates IP packets based on a time granularity and not the common cell (ATM,MPEG) granularity which results in less overhead on average compared to an ATM style encapsulation.
We see our hardware architecture as another big advantage over the approach of some competitors. By using a dual Pentium platform, we have a very powerful and future-proof platform, which is not the case for a lot of embedded processors. Thus, we have a flexible hardware architecture concerning access schemes and protocol requirements. Our software radio approach is based on PC and FPGA hardware, which is flexible, relatively cheap and also available in the coming years.
We have developed with our platform every module from the Ethernet Interface to the 70MHz Modem interface, which includes: IP handling, IP header compression, QoS support, DAMA, MF-TDMA access and adaptive transmission.