The invention discloses a method and a system for enabling the efficient operation of arbitrarily interconnected mesh networks. The system comprises: a device for operating for operating a first wireless mesh network and a second wireless mesh network as a multiple mesh network through transmission of data packet between the wireless mesh networks; and a device for transmitting data packets for according to efficient routing at least partially based on routing cost information to transmit data packets. The device for operating comprises first and second bridging two mesh nodes respectively associated with first and second wireless mesh networks. The device for transmitting data packets comprises a device for accumulating for at least partially accumulating the cost routing information during transmission.