| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide radio communication network system which automatically selects a communication channel and a routing root in accordance with occasional communication quality. <P>SOLUTION: Radio terminals C, I transmit packets which inform oneself's presence to surrounding radio terminals. Transmission timings of the packets are set in such a manner that the timings do not coincide with each other in the respective terminals. A transmission period is set according to the traffic of communication and the speed of a surrounding environmental variance, and especially reduced when a system is installed. The exchange of a packet which diagnoses the reliability of a communication channel is performed to a terminal, wherein the receiving frequency of the packets is high. As a result, a communication channel having reliability beyond a level is made an effective communication channel. System structural information is the relevant information of the number of transmission from terminals and destination terminals. Each of the terminals holds the system structural information of surrounding terminals to which direct communication channels are obtained together with self system structural information. Each of the terminals holds a transferring history and a call termination history of transmission packets and copes with multiple call termination. Transmission packets which exist on a network at least for a prescribed time are canceled. <P>COPYRIGHT: (C)2004,JPO</p> |
