Passive optical network system, optical line terminal and optical network units

Abstract

The invention discloses a passive optical network system, an optical line terminal, optical network units, a method for generating bandwidth mapping information and a method for processing the bandwidth mapping information. When implemented, the system can allow a plurality of ONUs using different uplink wavelengths to synchronously transmit uplink data during the same time period, thereby making full use of the uplink bandwidth of a GPON system, meeting demands of a user for uplink bandwidth and avoiding serious uplink bandwidth waste caused when a dynamic bandwidth distributing mechanism of the prior GPON system is applied to a multi-wavelength uplink GPON system.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a passive optical network system, an optical line terminal, an optical network unit, a method for generating bandwidth mapping information, and a method for processing bandwidth mapping information. Background technique [0002] With the increasingly rich telecommunication services, users' demand for access bandwidth is also increasing; in various access technologies, because optical fiber access has huge bandwidth and is suitable for long-distance transmission, operators all over the world have adopted optical fiber FTTH (fiber to the home) is an inevitable choice for the access network. In the specific implementation of FTTH, the passive optical network (PON, passive optical network) technology is currently the most used technology. [0003] attached figure 1 It is a networking diagram of a PON network. PON adopts a point-to-multipoint architecture, in which t...

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Problems solved by technology

[0010] According to attached figure 2 In the framework of the above, ONUs using different upstream wavelengths can send upstream data at the same time, while the existing Dynamic Bandwidth Allocation (DBA) mechanism is based on a single upstream wavelength, and the time slices allocated to ONUs are not allowed to overlap, so only One uplink wavelength is allowed to send data while other uplink wavelengths are idle, which causes a great waste of uplink bandwidth resources

In addition, according to the existing processing method, the ONU of each upstream wavelength also needs to analyze the bandwidth mapping (BWMap) information of the ONU belonging to other wavelengths, resulting in additional processing overhead and unnecessary system power consumption

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