Patent ID: 9357471
Filing Date: 2016-05-31
CPC Classification: H04L,H04W

Claim Text:
1. A node apparatus used in a network including a plurality of node apparatuses, the node apparatus being one of the plurality of node apparatuses, the node apparatus comprising: a receiver configured to receive search request data from a first node apparatus adjacent to the node apparatus, a transmission source of the search request data being a second node apparatus, the first node apparatus being used in the network as one of the plurality of node apparatuses, the second node apparatus being used in the network as one of the plurality of node apparatuses; a first storage configured to store transmission feasibility information in association with a final destination of data, for each adjacent node apparatus of the node apparatus, the transmission feasibility information representing data transmission feasibility from the node apparatus to the final destination; a processor; and a transmitter; wherein the processor generates transmission data in which the second node apparatus is specified as a final destination, the processor selects one or more adjacent node apparatus for which the transmission feasibility information indicates that transmission is feasible from among the adjacent node apparatuses of the node apparatus other than the first node apparatus, based on the transmission feasibility information associated with the second node apparatus as the final destination, the transmitter transmits the transmission data to the selected one or more adjacent node apparatus of the node apparatus other than the first node apparatus, the adjacent node apparatus of the node apparatus being used in the network as one of the plurality of node apparatuses, without transmitting the transmission data to the first node apparatus, the processor decides that an alternative path that does not pass through the first node apparatus does not exist between the node apparatus and the second node apparatus, when the transmission data transmitted to all of the selected one or more adjacent node apparatus of the node apparatus other than the first node apparatus is returned to the node apparatus, or when the transmitter fails to transmit the transmission data to all of the selected one of more adjacent node apparatus of the node apparatus other than the first node apparatus, the processor refers to the transmission feasibility information associated with the second node apparatus as the final destination, and decides that the alternative path does not exist between the node apparatus and the second node apparatus, when the transmission feasibility information of all the adjacent node apparatuses, other than the first node apparatus, indicates the transmission to the second node apparatus is unfeasible, the transmitter terminates the transmission of the transmission data, when the node apparatus is specified as the final destination of received data received by the receiver and the received data includes reception response data representing that the second node apparatus received the transmission data.