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Wave division and time division passive optical network

A technology of passive optical network and optical network unit, which is applied in the field of passive optical network access, can solve the problems of cost increase and achieve the effect of reducing the cost of networking

Active Publication Date: 2007-11-28
ZTE CORP
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  • Abstract
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  • Application Information

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Problems solved by technology

Therefore, the capacity is unmatched by the time-division multiplexing passive optical network, but it also brings about an increase in cost

Method used

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  • Wave division and time division passive optical network
  • Wave division and time division passive optical network
  • Wave division and time division passive optical network

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Embodiment Construction

[0017] Aiming at the requirement of uplink and downlink bandwidth, the present invention proposes a passive optical network Hybrid-PON (H-PON for short) with wavelength division and time division hybridization. Its characteristic is that the downlink transmission adopts wavelength division multiplexing, and the uplink transmission adopts time division multiplexing. Due to the large capacity of wavelength division multiplexing, the present invention guarantees the downlink bandwidth requirement, and at the same time, because the amount of uplink data is not large, the uplink adopts time division multiplexing to save costs, so that the wavelength division and time division are combined according to the actual situation. Give full play to their respective advantages as much as possible. The present invention uses N downlink wavelengths and one uplink wavelength. The uplink and downlink capacity ratio is 1:N.

[0018] Please refer to FIG. 4 for a schematic structural diagram of ...

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Abstract

The invention discloses a passive optical network to mix wavelength-division and time-division, which comprises the following parts: optical path terminal, N transmitters, first combining wave separator, optical allocating net, second combining wave separator, several optical network units to connect the allocating net through optical fiber, wherein the optical path terminal contains receiver to receive the upward wavelength signal separated by first combining wave separator; the optical allocating net concludes several couplers to receive the signal separated by second combining wave separator to transmit to the corresponding optical network unit when downwards and multiply upward wavelength signal of each optical network unit to transmit to the second combining wave separator when upwards; the second combining wave separator couples upwards to obtain the upward wavelength signal to transmit to the optical path terminal through optical fiber; the optical network unit converses the upward electric signal of user equipment into upward wavelength signal with specific wavelength to transmit to the corresponding coupler.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to the passive optical network (PON) access technology. Background technique [0002] With the development of Internet and broadband access technology, a large amount of data download services and video-on-demand services are increasingly used by users. This has higher requirements on the access network. At present, due to limitations in bandwidth, networking flexibility, security, and network management costs, high-quality, multi-service transmission is hindered in the network. After more and more optical devices and optical multiplexing technologies are used in the access network, broadband access will be substantially improved. Currently, there are many access methods, such as Asymmetric Digital Subscriber Line (ADSL), Hybrid Fiber Cable Access Network (HFC) and Passive Optical Network (PON, Passive Optical Network). Among them, the passive optical network ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/207H04B10/213H04B10/27H04Q11/00
Inventor 叶兵迟海明
Owner ZTE CORP
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