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Ethernet passive optical network based on Wavelength Division Multiple Access and data transmission method thereof

A passive optical network and wavelength division multiple access technology, applied in the field of Ethernet passive optical network and its transmission data, can solve the problems of high control bit overhead, low transmission efficiency, high hardware complexity, avoid conflicts and Waste of bandwidth, high data transmission efficiency, and the effect of simplifying system design

Inactive Publication Date: 2004-11-17
WUHAN OV ORANGE TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above technology can realize the uplink access of multiple ONUs, but it needs to carry out ONU ranging, time slot allocation and control, dynamic bandwidth allocation algorithm, etc. through a specially formulated protocol to avoid data packet conflicts and bandwidth waste, and realize it Complex, high control bit overhead, low transmission efficiency
In addition, due to the need to achieve burst mode transmission and fast synchronization, it directly leads to high hardware complexity, difficult production, and high cost

Method used

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  • Ethernet passive optical network based on Wavelength Division Multiple Access and data transmission method thereof
  • Ethernet passive optical network based on Wavelength Division Multiple Access and data transmission method thereof
  • Ethernet passive optical network based on Wavelength Division Multiple Access and data transmission method thereof

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Embodiment Construction

[0018] The invention provides an EPON system for bidirectional data communication through point-to-multipoint PON, which is connected by OLT and no less than two ONUs through ODN.

[0019] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] 1. Ethernet passive optical network based on wavelength division multiple access

[0021] Such as figure 1 , figure 2 As shown: the network includes OLT (central office optical line terminal equipment 101), ODN (passive optical distribution network 102 composed of optical fibers and passive components), and optical network units 103-n and user end equipment 104 connected thereto -n, the OLT connects to the backbone network and ODN downlink, where n is a natural number.

[0022] From the point of view of the physical structure, it is a point-to-multipoint branch topology (see image 3 ). However, from the perspective of the logical channel of data trans...

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Abstract

The invention discloses a passive optical network based on Wave Division Multiple Access Ethernet and its transmitting data method. As for physical structure, the network is a topological structure from one point to multi-point; as for logical channels of transmitting data, the network applies a topological structure with Wave Division Multiple Access from one point to one point in the up direction. The transmitting data method of the network: in the down direction, the data signals processed by OLT are emitted in order from the same transmitting port, on reaching ODN, they will be broadcasted by means of optical power division, every optical network unit only selects the data given to itself; in the up direction, the data of every optical network unit are emitted which load different independent wavelength, on reaching ODN, the light waves are merged, then the up data corresponding to every optical network unit are respectively selected after every wavelength are demultiplexed in OLT, the processed data are carried to the Wide Area Network or retransmitted to the other optical network unit. The invention can simplify system design and make the rate of transmitting data high.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to an Ethernet passive optical network based on wavelength division multiple access and a data transmission method thereof. Background technique [0002] Ethernet Passive Optical Network (EPON) implements Ethernet access on a point-to-multipoint Passive Optical Network (PON) topology. [0003] Generally, an EPON system is configured with an optical line terminal (OLT) and an optical network unit (ONU), as well as a passive optical distribution network (ODN) between the OLT and the ONU. In the EPON system described in IEEE (Institute of Electrical and Electronics Engineering) P802.3ah, the downlink direction from OLT to ONU adopts the broadcast method to transmit data, and the uplink direction from ONU to OLT adopts time division multiple access (TDMA) way to transfer data. In the upstream direction, the OLT allocates specific time slots for each ONU, and each O...

Claims

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Application Information

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IPC IPC(8): H04B10/272H04J14/02H04L12/28
Inventor 刘德明刘海李蔚胡保民刘武卢曦郑碧清
Owner WUHAN OV ORANGE TECH
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