US-12627378-B2 - Method and a system for tuning tunable optical transceivers

US12627378B2US 12627378 B2US12627378 B2US 12627378B2US-12627378-B2

Abstract

A method for tuning one or more tunable optical transceivers is disclosed herein. A controller assigns a particular wavelength to a tunable optical transceiver of the one or more tunable optical transceivers, where the one or more tunable optical transceivers and the controller are connected via an Inter-Integrated Circuit (I2C) interface. The tunable optical transceiver transmits an optical signal using the particular wavelength, where the particular wavelength is finalized for the tunable optical transceiver when an interrupt at a receiving port of the tunable optical transceiver is received.

Inventors

Jainendra BAHADUR
Ashish Kumar PANDEY
Deepika AMBWANI

Assignees

CENTRE FOR DEVELOPMENT OF TELEMATICS (C-DOT)

Dates

Publication Date: 20260512
Application Date: 20230628
Priority Date: 20220629

Claims (5)

1 . A system comprising one or more master tunable optical transceivers and one or more slave tunable optical transceivers, the system is configured to: assign, by a master controller, a first wavelength to a first master tunable optical transceiver of the one or more master tunable optical transceivers, wherein the one or more master tunable optical transceivers and the master controller are connected via an Inter-Integrated Circuit (I2C) interface; transmit, by the first master tunable optical transceiver, a first optical signal using the first wavelength to a first slave tunable optical transceiver of the one or more slave tunable optical transceiver; receive, by a first slave controller, a first interrupt upon receiving the first optical signal at the first slave tunable optical transceiver, wherein the one or more slave tunable optical transceivers and the first slave controller are connected via an I2C interface; assign, by the first slave controller, a first wavelength to a transmitting port of the first slave tunable optical transceiver when the first interrupt is occurred for a first time, wherein the first wavelength is finalized for the master controller and the first slave tunable optical transceivers when a feedback optical signal is received by the first master tunable optical transceiver and a first feedback interrupt is registered at the master controller; assign, by the master controller, a second wavelength to a second master tunable optical transceiver of the one or more master tunable optical transceivers; transmit, by the second master tunable optical transceiver, a second optical signal using the second wavelength to a second slave tunable optical transceiver of the one or more slave tunable optical transceiver; receive, by a second slave controller, a first interrupt upon receiving the second optical signal at the second slave tunable optical transceiver; assign, by the second slave controller, the first wavelength to a transmitting port of the second slave tunable optical transceiver when the first interrupt is occurred for the first time; transmit, by the second slave tunable optical transceiver, a second feedback optical signal using the first wavelength, wherein no signal or interrupt is received by the second master tunable optical transceiver; when no interrupt at the second master tunable optical transceiver is received for a first threshold period, disable, by the second master tunable optical transceiver, the transmission using the second wavelength for a second threshold period; after disabling the transmission using the second wavelength for the second threshold period, transmit, by the second master tunable optical transceiver, again the second optical signal using the second wavelength to the second slave optical transceiver; and assign, by the second slave controller, the second wavelength to the second slave tunable optical transceiver when a second interrupt occurs on the reception of the second optical signal after the second threshold period, wherein the second wavelength is finalized for the second master and the second slave tunable optical transceivers when a second feedback interrupt is registered at the master controller.
2 . The system as claimed in claim 1 , further comprising transmitting, to the first master tunable optical transceiver, the feedback optical signal using the first wavelength via the transmitting port of the first slave tunable optical transceiver.
3 . The system as claimed in claim 1 , further comprising transmitting, to the second master tunable optical transceiver, the feedback optical signal using the second wavelength via the transmitting port of the second slave tunable optical transceiver.
4 . The system as claimed in claim 1 , wherein the feedback interrupt is registered at the master controller based on the reception of the feedback optical signal at the receiving port of the first master tunable optical transceiver.
5 . The system as claimed in claim 1 , wherein the feedback interrupt is registered at the master controller for the first time based on reception of the feedback optical signal at the receiving port of the second master tunable optical transceiver.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority from Indian Patent Application No. 202211037418, filed Jun. 29, 2022, which is incorporated by reference herein to the extent that there is no inconsistency with the present disclosure. TECHNICAL FIELD The present disclosure generally relates to tuning of tunable optical transceivers. More particularly, the disclosure relates to tuning of a hub site and a node site optical transceivers with the help of controllers residing on the hub site and the node site. BACKGROUND This section is intended to introduce the reader to various aspects of art that may be related to various aspects of the present disclosure, which are described below. This disclosure is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present disclosure. Accordingly, it should be understood that these statements are to be read in this light, and not just as admissions of prior art. A wavelength division multiplexing-passive optical network (WDM-PON) is based on a dense wavelength-division multiplexing (DWDM) technology which is regarded as an ideal solution to meet the 5G front haul requirements. The WDM-PON is highly recommended for low-latency 5G front haul. The point to point WDM-PON is to be standardised under G.9804.x. With increase in the bandwidth demand, the network densification increases which has led to increase in the number of optical transceivers (OT) in current networks for supporting more numbers of antennas. The cheaper optical transceivers are those which support fixed wavelengths but the stock management process becomes complex and cumbersome for the fixed wavelength transceivers that results in the increase in network complexity. Inter-integrated circuit (I2C) tunable optical transceivers are a boon as it provides wider tuning range and greatly simplifies the inventory management process but requires a separate channel for management and wavelength configuration. This may require separate fibre and use of one or more technologies/protocols. To overcome the above issues, the optical industry has come out with a solution of auto-tunable optical transceivers. These are plug and play solutions with no inventory management. The disadvantage here is that the transceiver vendors offer proprietary transceivers at exorbitantly high prices and lack cross vendor interoperability. The transceivers on both sides of the system have to be from the same vendor for auto tuning feature to operate. Hence, all the above schemes significantly increase the capital expenditures (CAPEX) and operating expenses (OPEX) for the network. In the light of aforementioned challenges, there is a need for a method/protocol/scheme which can limit the CAPEX and the OPEX for the network. SUMMARY A method for tuning one or more tunable optical transceivers is disclosed herein. A controller assigns a particular wavelength to a tunable optical transceiver of the one or more tunable optical transceivers, where the one or more tunable optical transceivers and the controller are connected via an Inter-Integrated Circuit (I2C) interface. The tunable optical transceiver transmits an optical signal using the particular wavelength, where the particular wavelength is finalized for the tunable optical transceiver when an interrupt at a receiving port of the tunable optical transceiver is received. Optionally, each tunable optical transceiver is an Inter-Integrated Circuit (I2C) tunable optical transceiver, and optionally, each tunable optical transceiver is a master tunable optical transceiver controlled via the controller. Optionally, assigning the particular wavelength to the tunable optical transceiver comprises assigning the particular wavelength to a transmitting port of the tunable optical transceiver. Optionally, assigning the particular wavelength to the tunable optical transceiver comprises assigning the particular wavelength to a transmitting port of the tunable optical transceiver, and optionally, assigning the particular wavelength to the tunable optical transceiver is based on dynamic mapping stored in an internal memory of the controller. Optionally, when the interrupt at the receiving port of the tunable optical transceiver is not received for a first threshold period, disabling the optical signal transmission using the particular wavelength for a second threshold period. Optionally, assigning the particular wavelength to the tunable optical transceiver comprises assigning the particular wavelength to a transmitting port of the tunable optical transceiver. Optionally, assigning the particular wavelength to the tunable optical transceiver comprises assigning the particular wavelength to a transmitting port of the tunable optical transceiver, and optionally, assigning the particular wavelength to the tunable optical transceiver is based on dynamic mapping stored in an internal memory of the contr