(In order to ensure accurate communication between IP cores in a NoC (network on chip), the on-chip network communication architecture needs to be tested. This article proposes a BIST (built.inselftest, built-in self-test) method for testing the communication architecture about the functional testing of MeshNoC. This method adds the BIST module TPG (testpatterngenerator, test direction to NI (networkinterface, resource network interface))