- 专利标题: Optical access network method, optical access network, and optical switch for optical access network
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申请号: US11271817申请日: 2005-11-14
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公开(公告)号: US20060127087A1公开(公告)日: 2006-06-15
- 发明人: Hiroyuki Kasai , Toshinori Tsuboi , Hiromi Ueda , Takumi Nomura , Hirokazu Kobayashi , Kunitetsu Makino , Hiroyuki Endo
- 申请人: Hiroyuki Kasai , Toshinori Tsuboi , Hiromi Ueda , Takumi Nomura , Hirokazu Kobayashi , Kunitetsu Makino , Hiroyuki Endo
- 专利权人: NEC Communication Systems Ltd.
- 当前专利权人: NEC Communication Systems Ltd.
- 优先权: JP329378/2004 20041211
- 主分类号: H04J14/00
- IPC分类号: H04J14/00
摘要:
An optical access network method, an optical access network and an optical switch for an optical access network, capable of solving all the three problems in the conventional GE-PON: transmission distance problem, security problem and communication interference problem. The optical access network comprises an OLT, a plurality of ONUs and one or more stages of optical switches, which are connected one another. In the direction from the OLT to the ONU, each frame (packet) transmitted from the OLT to one of the ONUs is checked so that only the destination ONU specified in the frame (packet) is connected to the OLT. In the direction from the ONU to the OLT, a control message transmitted from the OLT to one of the ONUs is checked so that only one ONU which has been given a transmission allowance from the OLT is connected to the OLT with respect to each frame (packet).