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We address a problem of area protection in graph-based scenarios withmultiple mobile agents where connectivity is maintained among agents to ensurethey can communicate. The problem consists of two adversarial teams of agentsthat move in an undirected graph shared by both teams. Agents are placed invertices of the graph; at most one agent can occupy a vertex; and they can moveinto adjacent vertices in a conflict free way. Teams have asymmetric goals: theaim of one team - attackers - is to invade into given area while the aim of theopponent team - defenders - is to protect the area from being entered byattackers by occupying selected vertices. The team of defenders need tomaintain connectivity of vertices occupied by its own agents in a visibilitygraph. The visibility graph models possibility of communication between pairsof vertices.  We study strategies for allocating vertices to be occupied by the team ofdefenders to block attacking agents where connectivity is maintained at thesame time. To do this we reserve a subset of defending agents that do not tryto block the attackers but instead are placed to support connectivity of theteam. The performance of strategies is tested in multiple benchmarks. Thesuccess of a strategy is heavily dependent on the type of the instance, and soone of the contributions of this work is that we identify suitable strategiesfor diverse instance types.

Maintaining Ad-Hoc Communication Network in Area Protection Scenarios with Adversarial Agents