# A Systematic Literature Review on Military Software Defined Networks
## 5 Additional Contributions
### Software Defined Radio
Other research efforts of SDR are presented in [130; 131; 132; 133; 134; 135]. [PERSON] et al. [132] discussed SDR and different routing protocols for MANET. The MANET Reactive protocol (i.e., AODV) is implemented for SDR by using CSMA/CA, with some modifications. [PERSON] et al. [130] provided a review of the motivation, workflow and results of the NATO Research and Technology Organization (RTO)/Information Systems Technology (IST) Research Task Group (RTG) on SDR, which works on the issues concerning Software Communications Architecture (SCA) based implementations of waveforms on SDRs. The authors presented the SCA-based implementation results of STANAG 4285 waveform, and the effect of increasing the granularity of the SCA waveform application on the system overhead. [PERSON] et al. [133] envisioned that the Agile Cognizant Transceiver (ACT) platform built helps faster prototyping of defence systems and paves the way for faster product induction cycles in defence automation. ACT is a complete indigenous solution developed with SDR, in order to support wide band requirements and multi technology waveforms. [PERSON] et al. [135] presented case studies of attacks aimed at tactical SDR, based on a classification with the most common sources of vulnerabilities, classes of attacks, and types of intrusions that military radio sets may suffer. The authors also described how attack mitigation strategies can impact the development of SDR infrastructures. [PERSON] et al. [136] presented a comprehensive survey of full-duplex (FD)-cognitive radio networks (CRNs) communication. The authors covered the supporting network architectures and the various antenna designs. The authors also surveyed major advances in full-duplex medium access protocol (FD-MAC) protocols as well as open issues, challenges, and future research directions to support the FD operation in CRNs. [PERSON] et al. [137] reported the detailed account of the design and implementation challenges of an aerial network consisting of LTE-Advanced (LTE-A) base stations. In particular, the authors reviewed achievements and innovations harnessed by an aerial network composed of Helikite platforms. Helikites can be raised in the sky, while they carry battery, antenna, and RRH (Remote Radio Head) equipment to bring Internet access during special events and in the aftermath of an emergency. [PERSON] et al. [138] described the rapid development of a P25 waveform on a surrogate Joint Tactical Radio System (JTRS) SDR platform. The JTRS program is enabling communications within the military, by implementing different military radio waveforms on SDR platforms. Furthermore, the authors presented the design and implementation of a three way voice bridge among P25, the future multiband multiwaveform modular tactical radio (FM3 TR), and Voice over Internet Protocol (VoIP), with software communication architecture (SCA) compliant implementation for both the P25 and FM3 TR waveforms. [PERSON] et al. [139] surveyed possible public safety use cases with the induced network topologies, discussed the current status of the 3 GPP standards, and highlighted future challenges. The authors further elaborated on the need to support mobile backhauling in moving-cell scenarios, and describe two LTE-based solutions to enable dynamic meshing among the base stations. [PERSON] et al. [140] surveyed the existing security attacks along with their state-of-the-art countermeasures and respective limitations. The authors also proposed new security paradigms for detecting and counteracting malicious activities, both from a generic perspective and within specific scenarios in Underwater Acoustic Networks (UANs). The main research challenges related to the cooperation of mobile and static nodes in a distributed and ad hoc way have been addressed, together with the investigation of multi-metric accurate reputation systems, secure deployment and adaptive monitoring techniques. [PERSON] et al.