Nanosatellites offer an affordable way to realize distributed systems for novel scientific and commercial applications in the area of Earth observation and global communication services. Therefore communication protocols need to be developed that that allow for efficient and reliable communication in these challenging wireless networks. Delay Tolerant Networking (DTN) has been considered an appropriate approach for networks with intermittent connectivity such as deep space or low Earth orbit networks. DTN protocols, such as the Bundle Protocol, can make use of so called contact plans for routing purposes, that represent the anticipated topology of a network. Another challenging issue of these wireless networks is Medium Access Control (MAC). The use of existing MAC schemes such as Carrier Sense Multiple Access (CSMA) is inefficient due to the characteristics of space-terrestrial networks. In this paper, a contact plan design approach is presented that solves the MAC problem by predicting additive multi-node interference and scheduling interference-free links based on these predictions. Thereby the presented MAC scheme makes use of the predictability of space-terrestrial networks. An interference-free contact plan design (IFCPD) scheme will be presented and compared to existing schemes. The resulting contact plans are used by a DTN routing protocol for space-terrestrial networks. Performance parameters have been evaluated by simulations of an orbit configuration for multi-satellite Earth observation systems using a satellite communication simulation framework based on the popular OMNeT++ discrete event simulator.
Interference-Free Contact Plan Design for Wireless Communication in Space-Terrestrial Networks
2019-07-01
318599 byte
Conference paper
Electronic Resource
English
HF Interference in Space from Terrestrial Sources
British Library Conference Proceedings | 1996
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