Wave time division mixed multiplexing passive optical network system

Abstract

The invention discloses a wave time division mixed multiplexing passive optical network system, which comprises a central office terminal, a client, and an optical distribution network arranged between the central office terminal and the client, wherein the central office terminal comprises an optical line terminal; the client comprises at least one optical network unit; and the optical network unit comprises an uplink processing unit which is used for loading uplink modulation signals to form uplink optical signals with specific wavelength and inputting the uplink optical signals into the optical distribution network. On the premise of ensuring high bandwidth and a large user number and meeting budget of the optical power of the whole network, low-cost colorless optical network unit (ONU) technology without multi-wavelength light source is used, and the passive characteristic of the whole optical distribution network (ODN) is kept, so the networking cost is obviously reduced.

Description

technical field [0001] The invention relates to the field of optical access network communication, in particular to a passive optical network system with wavelength division and time division hybrid multiplexing. Background technique [0002] With the development and maturity of passive optical network (PON: Passive Optical Network) technology, FTTX technology (referring to a series of optical access technologies such as fiber-to-the-home, fiber-to-the-building, and fiber-to-the-curb) has begun to be widely used in the global field . Source-optical network technology has the advantages of low cost, multi-user access, ultra-long-distance transmission, and high transmission bandwidth. Mainstream development technology. [0003] The existing passive optical network is mainly based on time division multiplexing passive optical network (TDM-PON: TimeDivision Multiplexing-Passive Optical Network). TDM-PON adopts a single wavelength for uplink and downlink, and the utilization ra...

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Problems solved by technology

[0006] Although the HPON system has many advantages, its network construction cost is still a serious problem. If the ONU uses multiple wavelengths, it will obviously increase the cost of equipment production and storage, and reduce the versatility of the equipment. Therefore, the key to reducing costs lies in how to Introducing "colorless" ONU technology that avoids the use of multi-wavelength light sources in HPON, how to realize "colorless" ONU has become a hot issue in WDM-PON system research

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