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EPON Protocol over Coax, or EPoC, refers to the transparent extension of an Ethernet passive optical network (EPON) over a cable operator's hybrid fiber-coax (HFC) network. From the service provider's perspective the use of the coax portion of the network is transparent to EPON protocol operation in the optical line terminal (OLT) thereby creating a unified scheduling, management, and quality of service (QoS) environment that includes both the optical and coax portions of the network. The IEEE 802.3 Ethernet Working Group initiated a standards process with the creation of an EPoC Study Group in November 2011. EPoC adds to the family of IEEE 802.3 Ethernet in the First Mile (EFM) standards. ==Standards== The Institute of Electrical and Electronics Engineers (IEEE) 802.3 standards committee published standards for a symmetric 1Gbit/s EPON network, originally published in September 2004 as IEEE 802.3ah-2004, and a 10Gbit/s EPON network permitting symmetric 10Gbit/s and asymmetric 10Gbit/s downstream 1Gbit/s upstream, originally published in June 2009 as IEEE 802.3av-2009 also known as 10G-EPON. A Call For Interest (CFI) group process was initiated in May 2011 by Broadcom after receiving requests for initiating EPoC standardization in IEEE from Chinese cable operators and then also by North American cable operators. Many companies became involved in the CFI creation and consensus process. According to the CFI materials, representatives from the following companies supported the formation of the study group:〔("EPON PHY for Coax - Call For Interest Presentation )〕 Alcatel-Lucent, Aurora Networks, Bright House Networks, Broadcom, Cogeco Cable, Inc., CableLabs, Comcast, Cox Networks, Dell, Fiberhome Telecommunication Technologies, Harmonic, Inc., Hewlett-Packard, High Speed Design, Huawei, Neophotonics, PMC-Sierra, Qualcomm, Sumitomo Electric Industries, Technical Working Committee of China Radio & TV Association, Time Warner Cable, Wuhan Yangtze Optical Technologies Co.,Ltd., and ZTE. In November 2011, the "EPON PHY for Coax" CFI was presented to the IEEE 802.3 Working Group plenary and the creation of the EPoC Study Group (SG) was approved. In May 2012, the EPoC Study Group completed its draft Project Authorization Request (PAR), its "5 Criteria" responses, and a set of objectives for further work. These materials require review and approval by the IEEE 802.3 Working Group, the IEEE 802 LAN/MAN Standards Committee (LMSC), and the IEEE New Standards Committee (NesCom). Upon receiving approval, the EPoC Study Group will transition to the EPoC Task Force (TF) and then will begin its work that leads directly to creating the draft standard. On 30 August 2012, the IEEE-SA approved the PAR permitting the IEEE 802.3 Working Group to charter the IEEE P802.3bn Task Force.〔("IEEE P802.3bn EPoC PHY Task Force home page )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「EPON Protocol over Coax」の詳細全文を読む スポンサード リンク
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