Optical network unit and optical link terminal

Abstract

In order to provide a method for all-optical ONU mutual communication with a low cost, the present invention provides an optical network unit and an optical link terminal. The optical network unit includes: a generating portion, for generating an upward optical signal, which includes upward data modulated at a first communication wavelength and multiplexed by means of time division and first mutual communication information between the optical network units; and an output interface, for sending the upward optical signal to the optical link terminal. The optical link terminal includes: an input interface, for receiving the upward optical signal from the optical network unit; a shift switch, for respectively shifting the upward optical signal of the upward data and the optical signal of the mutual communication information by means of time division to an uplink receiver and a communication processing unit; the uplink receiver, for detecting the upward optical signal of the upward data to obtain the upward data; and the communication processing unit, for sending the optical signal of the mutual communication information to a corresponding optical network unit.

Description

technical field [0001] The present invention relates to optical networks, in particular to passive optical networks. Background technique [0002] With the widespread application of advanced multimedia, such as 3D TV, telemedicine services, online games, interactive video e-learning and other applications, the demand for bandwidth has increased tremendously. Next-generation PON2 (NG-PON2), as a long-term evolution PON solution, aims to improve the capabilities of optical access systems to better support these high-bandwidth applications. T) and full service access network (Full Service Access Network, referred to as FSAN) organizations to discuss. Most operators hope that NG-PON2 can provide larger bandwidth, higher splitting ratio (greater than 1:64), longer transmission distance and better access capability. Currently, ITU-T and FSAN are finalizing the requirements for NG-PON2 to increase the available bandwidth to 40Gb / s. [0003] Among the proposed technical solutions...

AI Technical Summary

Problems solved by technology

However, in the existing TWDM-PON structure, the interconnection between base stations is based on the mutual communication between ONUs. Due to the aforementioned reasons, the mutual communication is affected by the delay caused by optical-electrical-optical conversion, buffering, etc.

This delay cannot meet the stringent end-to-end delay requirements in LTE-A networks

[0007] In addition, the TWDM-PON network requires a splitting ratio of no less than 1:64, and requires long reach (long reach), which means that more ONUs need to be deployed, so there will be more communication between ONUs, so the ONU The overall latency of communicating with each other will also increase, which has a negative impact on latency-sensitive applications such as online gaming, video conferencing, etc.

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