关键词: 多源多目标, 网络层析成像, 拓扑估计, 可辨识性

Abstract: Multiple source network tomography，which breaks through the limit that single source topologies discovery can only be used to tree topologies，can obtain mesh network topology by using end-to-end measurements of multiple source multiple destination.Aiming at the problem of identifiability in existed methods，this paper proposed a method of estimating the topology information by getting the hierarchical feature of basic analytical units（two sources，two destinations subnet）.Furthermore，this paper introduced a new merging algorithm，which can identify any kind of network topology，to merge the topology information of basic analytical units and obtain the topologies of mesh networks.It has demonstrated that the method has stronger identifiability，which has also been proved by the simulation.

Key words: multiple source-multiple destination, network tomography, topology estimate, identifiability