CoLlAborative eMbedded networks for submarine surveillance (CLAM) Project

This deliverable addresses the problem of protocol design for the underwater acoustic networks to be employed in CLAM. The design concerns mainly Medium Access Control (MAC), routing and link-level error control, with considerations on data aggregation in hierarchical underwater networks. The analysis of the protocols considered in this deliverable is approached by means of simulations, using the nsMiracle+WOSS simulation package chosen in WP5. This deliverable contains several original contributions • The simulation of three MAC protocols in the CLAM scenario; these protocols are based on three different types of random access in order to identify which approach works best; • The design and simulation of a new protocol to enable the upload of data to a mobile sink patrolling a network of fixed nodes; • The design and simulation of two different routing protocols; • The derivation of an optimization framework which helps compute benchmarks for the average packet delivery delay in the network as a function of the number of nodes generating packets (under the assumption that the network topology and the mutual propagation delays are fully known; • An analysis of the effects of data aggregation in hierarchically organized underwater networks in the presence of different transmission scheduling techniques. In addition, we remark that some of the protocols designed for CLAM inherently operate according to cross-layer paradigms, either by requiring communication across different layers, or by incorporating the functions of more layers into a super-layer. The analysis of the protocols above allows us to derive conclusions as to which protocol should be preferred as a function of the regime of operation required to the network. The results of this deliverable will be compared with those of D5.2, where we will simulate the CLAM protocols in a scenario of comparable size with respect