发明名称 |
STATION SIDE OPTICAL NETWORK TERMINAL DEVICE, OPTICAL COMMUNICATION SYSTEM, ABNORMALITY DETECTION METHOD, AND DEVICE PROGRAM |
摘要 |
<P>PROBLEM TO BE SOLVED: To quickly and easily detect an abnormality in an Optical Network Terminal (ONU). <P>SOLUTION: An Optical Line Terminal (OLT) comprises: scheduling means which assigns an exclusive transmitting timing to each ONU; control signal transmitting means which transmits to each ONU a control signal for making data transmitted along a transmitting timing assigned by the scheduling means; and monitoring means which monitors an optical signal received through a transmission path. In the scheduling means, scheduling is performed so that all the connected ONUs include a non-communication state where transmission of the optical signal is stopped. In the monitoring means, monitoring is performed including a reception state in the non-communication state. <P>COPYRIGHT: (C)2012,JPO&INPIT |
申请公布号 |
JP2012151737(A) |
申请公布日期 |
2012.08.09 |
申请号 |
JP20110009888 |
申请日期 |
2011.01.20 |
申请人 |
NEC CORP;NEC ACCESS TECHNICA LTD |
发明人 |
KAWAGUCHI NAOHISA;KANDA YASUHISA |
分类号 |
H04L12/44 |
主分类号 |
H04L12/44 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|