Optical module rate negotiation method and system

Abstract

The invention relates to an optical module rate negotiation method and system. The method comprises the following steps: step 1, respectively arranging a home terminal information processing unit and an opposite terminal information processing unit at a home terminal optical module and an opposite terminal optical module; the home terminal information processing unit and the opposite terminal information processing unit have information interaction processing functions of setting a capability set and obtaining an opposite side capability set; and step 2, enabling the home terminal optical module and the opposite terminal optical module to be in a negotiation mode at the same time, and realizing interaction between the home terminal information processing unit and the opposite terminal information processing unit through a channel between the home terminal optical module and the opposite terminal optical module so as to execute a rate negotiation process. According to the invention, the information processing unit is added to the optical module, a channel is used between the optical modules, information interaction between the optical modules is realized, and automatic rate negotiation between two communication devices is realized by using a negotiation mode.

Description

Technical Field

[0001] The present invention belongs to the field of communication technology, and in particular relates to an optical module rate negotiation method and system. Background Art

[0002] In network communications, the automatic rate negotiation function of communication equipment usually refers to a device notifying the device at the remote end of the link of its operating mode and detecting the corresponding operating mode notified by the remote end. The two parties exchange notifications of their respective transmission capabilities through fast link pulses (FLPs).

[0003] Optical modules are commonly used in communications equipment. Common optical modules do not have auto-negotiation capabilities. This feature is typically used between two communications devices connected via copper cables or backplanes. When connecting two devices using optical modules, you typically need to manually configure the speed of both ports.

[0004] Typically, optical modules are designed with parameters such as rate, wavelength, and transmission distance in mind, which determine the hardware circuitry and lasers used. For example, if an optical module supporting 200G-R4 mode requires 100G-R4 mode, and a single channel in 100G-R4 mode needs to support 25G NRZ encoding, while a single channel in 200G-R4 mode needs to support 50G PAM4 encoding, then the two modes require different lasers and codec circuits. This significantly increases the cost of the optical module, so optical modules that support 200G-R4 mode are generally unable to support 100G-R4 mode. Some optical modules can increase the total bandwidth by splitting or aggregating channels. For example, an optical module that supports 200G-R4 (4*50G) mode will typically also support 50G-R and 100G-R2 (2*50G) modes.

[0005] Therefore, for multi-channel optical modules, a technical solution is needed that can realize information exchange between optical modules and complete automatic rate negotiation between two communication devices. Summary of the Invention

[0006] The purpose of the present invention is to provide an optical module rate negotiation method and system, which realizes information exchange between optical modules by adding an information processing unit to the optical module and using a channel (lane) between the optical modules, so as to realize automatic rate negotiation between two communication devices.

[0007] The present invention provides an optical module rate negotiation method, comprising the following steps:

[0008] Step 1: respectively setting a local information processing unit and a peer information processing unit on the local optical module and the peer optical module; the local information processing unit and the peer information processing unit have information interaction processing functions of setting a capability set and obtaining the capability set of the other party;

[0009] Step 2: Make the local optical module and the opposite optical module simultaneously in negotiation mode, and realize the interaction between the local information processing unit and the opposite information processing unit through a channel between the local optical module and the opposite optical module to execute the rate negotiation process.

[0010] Furthermore, the step 2 includes:

[0011] 1) Check whether the local optical module and the remote optical module are in place. If they are, set both the local optical module and the remote optical module to negotiation mode;

[0012] 2) Setting a capability set of the local optical module in the local information processing unit;

[0013] 3) The local optical module initiates a negotiation processing request, interacts with the remote information processing unit through the local information processing unit, and requests to obtain the capability set of the remote optical module; if the request is successful, the process proceeds to step 6); if the request fails, the process proceeds to step 4);

[0014] 4) If the number of requests does not exceed 3, the negotiation processing request is sent again; if it exceeds 3 times, the local optical module enters the monitoring state to monitor the acquisition capability set request of the other optical module;

[0015] 5) If the local optical module monitors the acquisition capability set request of the opposite optical module, the capability set of the local optical module is sent to the opposite optical module, and the process goes to step 7);

[0016] 6) The local optical module sets the maximum rate mode that is suitable for the peer optical module according to its capability set;

[0017] 7) The local information processing unit interacts again with the peer information processing unit to determine the final rate mode to be used;

[0018] 8) The local optical module is set to normal mode;

[0019] 9) The local optical module and the remote optical module use the negotiated rate mode and configure the relevant parameters;

[0020] 10) Start the normal connection process between the local optical module and the remote optical module.

[0021] The present invention also provides an optical module rate negotiation system, comprising a local optical module and a peer optical module, wherein the local optical module is provided with a local information processing unit, and the peer optical module is provided with a peer information processing unit; the local information processing unit and the peer information processing unit have information interaction processing functions of setting a capability set and obtaining the capability set of the other party;

[0022] The local information processing unit and the opposite information processing unit implement information exchange processing and execute a rate negotiation process through a channel between the local optical module and the opposite optical module.

[0023] By means of the above scheme, through the optical module rate negotiation method and system, an information processing unit is added to the optical module, and a channel between the optical modules is used to realize information interaction between the optical modules. By using the negotiation mode, automatic rate negotiation between the two communication devices is realized.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the connection of an optical module in one embodiment of the present invention;

[0026] Figure 2 The figure is a flow chart of a method for negotiating optical module rate according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0028] This embodiment provides a method for negotiating an optical module rate, including the following steps:

[0029] Step 1: respectively set a local information processing unit and a peer information processing unit on the local optical module and the peer optical module; the local information processing unit and the peer information processing unit have information interaction processing functions of setting capability sets and obtaining capability sets of the other party.

[0030] Ginseng Figure 1 As shown, Figure 1 This diagram shows the connection of QSFP optical modules supporting three data rate modes: 200G-SR4, 100G-SR2, and 50G-SR. Optical modules operate in two modes: negotiation mode and normal mode. The information processing unit (IPU) operates only in negotiation mode, interacting with the IPU of the other optical module using only lane 0. Interaction between the IPUs of two optical modules requires both optical modules to be in negotiation mode. Capability set information includes various configurations of supported bandwidth and number of channels, as well as various FEC methods.

[0031] Step 2: Make the local optical module and the opposite optical module simultaneously in negotiation mode, and realize the interaction between the local information processing unit and the opposite information processing unit through a channel between the local optical module and the opposite optical module to execute the rate negotiation process.

[0032] Ginseng Figure 2 The specific negotiation process is as follows:

[0033] 1) Check whether the local and remote optical modules are in place. If so, set both to negotiation mode. Check whether the optical modules are in place. If not, stop the process. If so, set them to auto-negotiation mode and reset them to enter auto-negotiation mode.

[0034] 2) Setting the capability set of the local optical module in the local information processing unit. The local optical module (optical module 1) writes the capability set (rate mode and error correction method, etc.) of the local information processing unit into the RAM of the local information processing unit through the I2C interface.

[0035] 3) The local optical module initiates a negotiation processing request (capability set acquisition request), interacts with the opposite information processing unit through the local information processing unit, and requests to obtain the capability set of the opposite optical module (optical module 2); if the request is successful, proceed to step 6), and if the request fails, proceed to step 4).

[0036] 4) If the number of requests does not exceed 3 times, the negotiation processing request is sent again; if it exceeds 3 times, the local optical module enters the monitoring state to monitor the acquisition capability set request of the other end optical module.

[0037] 5) If the local optical module monitors the capability set acquisition request of the opposite optical module, the capability set of the local optical module is sent to the opposite optical module, and the process goes to step 7).

[0038] 6) The local optical module sets a maximum rate mode that is adapted to (appropriate for) the peer optical module based on its capability set.

[0039] 7) The local information processing unit interacts with the peer information processing unit again to determine the rate mode to be used.

[0040] 8) Set the local optical module to normal mode and reset it to enter normal mode. After switching to normal mode, the optical module can implement the configuration process of common optical modules and is compatible with common optical modules.

[0041] 9) The local optical module and the remote optical module use the negotiated rate mode and configure related parameters.

[0042] 10) Start the normal connection process between the local optical module and the remote optical module.

[0043] This embodiment further provides an optical module rate negotiation system, comprising a local optical module and a remote optical module, wherein the local optical module is provided with a local information processing unit, and the remote optical module is provided with a remote information processing unit; the local information processing unit and the remote information processing unit have information exchange processing functions for setting a capability set and obtaining the capability set of the other party;

[0044] The local information processing unit and the opposite information processing unit implement information exchange processing through a channel between the local optical module and the opposite optical module, and execute the rate negotiation process (the above steps 1 to 10).

[0045] The present invention adds an information processing unit to the optical module, uses a channel between the optical modules, realizes information interaction between the optical modules, and realizes automatic rate negotiation between two communication devices by using a negotiation mode.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for negotiating optical module rate, characterized in that: The steps include: Step 1: respectively setting a local information processing unit and a peer information processing unit on the local optical module and the peer optical module; the local information processing unit and the peer information processing unit have information interaction processing functions of setting a capability set and obtaining the capability set of the other party; Step 2: Make the local optical module and the opposite optical module simultaneously in negotiation mode, and realize the interaction between the local information processing unit and the opposite information processing unit through a channel between the local optical module and the opposite optical module to execute the rate negotiation process.

2. The optical module rate negotiation method according to claim 1, wherein: The step 2 includes: 1) Check whether the local optical module and the remote optical module are in place. If they are, set both the local optical module and the remote optical module to negotiation mode; 2) Setting a capability set of the local optical module in the local information processing unit; 3) The local optical module initiates a negotiation processing request, interacts with the remote information processing unit through the local information processing unit, and requests to obtain the capability set of the remote optical module; if the request is successful, the process proceeds to step 6); if the request fails, the process proceeds to step 4); 4) If the number of requests does not exceed 3, the negotiation processing request is sent again; if it exceeds 3 times, the local optical module enters the monitoring state to monitor the acquisition capability set request of the other optical module; 5) If the local optical module monitors the acquisition capability set request of the opposite optical module, the capability set of the local optical module is sent to the opposite optical module, and the process goes to step 7); 6) The local optical module sets the maximum rate mode that is suitable for the peer optical module according to its capability set; 7) The local information processing unit interacts again with the peer information processing unit to determine the final rate mode to be used; 8) The local optical module is set to normal mode; 9) The local optical module and the remote optical module use the negotiated rate mode and configure the relevant parameters; 10) Start the normal connection process between the local optical module and the remote optical module.

3. An optical module rate negotiation system, characterized in that: It includes a local optical module and a peer optical module, wherein the local optical module is provided with a local information processing unit, and the peer optical module is provided with a peer information processing unit; the local information processing unit and the peer information processing unit have information interaction processing functions of setting capability sets and obtaining capability sets of the other party; The local information processing unit and the opposite information processing unit implement information exchange processing and execute a rate negotiation process through a channel between the local optical module and the opposite optical module.

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