NETWORK SYSTEM, NODE, PACKET FORWARDING METHOD, PROGRAM, AND RECORDING MEDIUM
申请公布号:WO2009123112(A1)
申请号:WO2009JP56494
申请日期:2009.03.30
申请公布日期:2009.10.08
发明人:FURUKAWA, HIROSHI;MITSUNAGA, KEI
分类号:H04W40/06;H04W40/28
主分类号:H04W40/06
摘要:Provided is a network system which can realize a packet relay transmission having a higher relay transmission efficiency than the conventional periodic intermittent transmission method (IPT) using a non-directivity antenna. A directivity antenna is employed for the IPT. Each of slave nodes waits for reception by a directivity antenna set for receiving a downlink packet when in a state waiting for a downlink packet. Furthermore, a downlink packet is handled as a polling control signal. Upon reception of a downlink packet, an uplink packet is transmitted so as to eliminate the problem of a hidden terminal or the carrier sense problem. Moreover, it is possible to form a more appropriate channel by using a routing protocol in which each of the nodes has a directivity changed by probability in a channel formation process.
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