Endogenous Anti-Jamming Communications for SAGIN: A Network Perspective

The anti-jamming communication technologies have developed from conventional anti-jamming to intelligent anti-jamming, and the endogenous anti-jamming has gradually attracted attention. Nowadays, these anti-jamming technologies mainly focus on the physical layer and link layer, which can achieve reliable point-to-point communications. Due to the sharp increase of the network coverage, the space-air-ground integrated network (SAGIN) is facing more critical anti-jamming challenges with new qualitative changes such as larger spatiotemporal scale, higher dynamic range, more complex service types and more diverse jamming patterns. Recently, there is a potential trend that SAGIN is suffering from multi-level, multi-dimensional and systematic jamming attacks. However, the heterogeneous network structure also provides a new intrinsic anti-jamming dimensionality due to the dynamic redundancy of multi-link topology, the resilient scheduling of multiple resources and the active coordination of various services. Therefore, it is important to focus on the competition, cooperation and mutual influence among numerous nodes in SAGIN to enhance the endogenous anti-jamming ability from the network perspective, instead of trying to identify when and where the jamming attacks are occurring, or trying to identify the precise types of the constantly emerging jamming. This paper provides the basic framework and strategy of the network-based endogenous anti-jamming, which is in accord with the construction, configuration and utilization of SAGIN in the full life cycle. Case studies are proposed to cast deep insights on the application of network-perspective anti-jamming methods. Finally, future research directions are provided.