Abstract: A wireless multi-hop network is formed by exchanging a control message including a HELLO message and a topology message between a plurality of communication terminals. A communication terminal adjusts a control message transmission interval so as to reduce the control load according to its movement state and transmits a control message at a longer transmission interval as the movement becomes smaller. Moreover, when link information is updated, the communication terminal includes the sequence number of the HELLO message in the topology message transmitted. Thus, it is possible to realize stable communication in accordance with a movement characteristic with a small message transmission frequency.

Abstract: A wireless multi-hop network is formed by exchanging a control message including a HELLO message and a topology message between a plurality of communication terminals. A communication terminal adjusts a control message transmission interval so as to reduce the control load according to its movement state and transmits a control message at a longer transmission interval as the movement becomes smaller. Moreover, when link information is updated, the communication terminal includes the sequence number of the HELLO message in the topology message transmitted. Thus, it is possible to realize stable communication in accordance with a movement characteristic with a small message transmission frequency.

Abstract: To provide a wireless multi-hop network in which the stable bandwidth ensured communication can be made without causing a collision of time slots due to the terminal movement or reserving the slot again due to a route change on the path of end-to-end communication. A terminal makes a slot allocation request for 3 Hops to a slot allocation server. Since unique slots within the network are allocated by the slot allocation server, there is no interference with the slots by other terminals. The terminal transmits the packet by inserting the slot information into an option header. A forwarding terminal that forwards the packet decides the transmission slot based on the slot information in the option header and its own hop count at the time of forwarding the packet.