CN118509051B - Host and full-time FFP communication method - Google Patents
Host and full-time FFP communication method Download PDFInfo
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- CN118509051B CN118509051B CN202410953630.4A CN202410953630A CN118509051B CN 118509051 B CN118509051 B CN 118509051B CN 202410953630 A CN202410953630 A CN 202410953630A CN 118509051 B CN118509051 B CN 118509051B
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- 238000004891 communication Methods 0.000 title claims abstract description 165
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 238000012549 training Methods 0.000 claims description 30
- 238000001997 free-flow electrophoresis Methods 0.000 claims 4
- 239000013307 optical fiber Substances 0.000 claims 1
- 230000003993 interaction Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
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- 238000007476 Maximum Likelihood Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07953—Monitoring or measuring OSNR, BER or Q
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03178—Arrangements involving sequence estimation techniques
- H04L25/03248—Arrangements for operating in conjunction with other apparatus
- H04L25/03254—Operation with other circuitry for removing intersymbol interference
- H04L25/03267—Operation with other circuitry for removing intersymbol interference with decision feedback equalisers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03878—Line equalisers; line build-out devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/03592—Adaptation methods
- H04L2025/03745—Timing of adaptation
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
- Communication Control (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention discloses a communication method of a host and a full-time FFP. In order to reduce communication power consumption, the invention obtains the signal-to-noise ratio or/and the error rate of a first communication link and a second communication link through a link monitor, and adjusts the communication parameters of the first communication link and the communication parameters of the first communication link according to a first communication link target adjustable parameter set and a second communication link target adjustable parameter set; in addition, data transmission between the second receiver and the second transmitter and between the third receiver and the third transmitter is established through the multiplexing and demultiplexing device. The invention optimizes the compensation scheme of the high-speed link aiming at different system link conditions in the communication scene of the host and the full-time FFP, so that the energy efficiency ratio of the communication scheme is optimal. The invention is suitable for the field of high-speed communication.
Description
Technical Field
The invention relates to the field of high-speed communication, in particular to a method for communicating a host with a full-time FFP.
Background
Communication between the host and the full retime (Full Retime) pluggable transceiver (Form-Factor Pluggable, FFP) achieves efficient and reliable high-speed data transmission through advanced retime and photoelectric conversion techniques. The use of full-time FFPs has significant advantages in data centers, telecommunications networks, and enterprise networks, supporting the continued development and upgrades of modern network infrastructure.
In a data center, in the communication scenario of a host with a full retime FFP, the ethernet module, to avoid additional complexity, link training is not functional on an ethernet host with an accessory Unit Interface of 100Gbit/s (100 Gbit/S ATTACHMENT Unit Interface, 100G-AUI).
The core function of the full retiming FFP is the retiming capability. Retiming refers to the re-timing of a signal to eliminate jitter and signal distortion. The full retiming FFP performs retiming processing when receiving and transmitting signals, thereby ensuring the integrity and stability of the signals, and mainly comprises the following steps: receiving the optical signal and converting the optical signal into an electrical signal, carrying out re-timing processing on the electrical signal, eliminating jitter and noise, recovering the integrity of the signal, converting the electrical signal subjected to re-timing processing into the optical signal, and transmitting the optical signal.
The full-time FFP has the characteristics of high performance, strong compatibility, re-time function, pluggable design and the like, and has good flexibility and expansibility. But full retimed FFPs face challenges of power management, complexity, and cost.
Fig. 3 shows a graph of energy efficiency of a Serializer-Deserializer (SerDes) system as a function of insertion loss for different channels, with signal insertion loss often being related to link distance. According to the size of the insertion loss of the channel, the SerDes energy efficiency ratio change trend can be divided into a plurality of intervals according to the three link distances of long distance, very short distance and ultra-short distance. Fig. 3 illustrates typical technical means corresponding to each interval, and compares the energy efficiency improvement effect with the continuous evolution of the process under the same communication rate condition.
It is easy to see that different intervals often have different energy efficiency change trend characteristics, and some intervals have flatter energy efficiency change and some intervals are steeper. Such different energy efficiency characteristics indicate that the same link compensation scheme is used for different link distances, resulting in a significant amount of energy waste.
There is no effective communication solution at present, and the compensation scheme of the high-speed link can be optimized for different system link conditions, so that the energy efficiency ratio of the communication scheme is optimal.
Disclosure of Invention
In order to alleviate or partially alleviate the above technical problem, the solution of the present invention is as follows:
A method of communicating a host with a full-time FFP, the host including a first transmitter and a first receiver, the full-time FFP including a second transmitter, a second receiver, a third transmitter, a third receiver, and a multiplexing and de-multiplexing device, the method of communicating a host with a full-time FFP comprising the steps of: establishing a first communication link between a first transmitter and a second receiver, and establishing a second communication link between the second transmitter and the first receiver; according to the signal-to-noise ratio or/and the error rate of the first communication link obtained by the link monitor, the communication parameters of the second receiver and the communication parameters of the first transmitter, the second receiver obtains a first communication link target adjustable parameter set, and then adjusts the communication parameters of the first communication link according to the first communication link target adjustable parameter set; according to the signal-to-noise ratio or/and the error rate of the second communication link obtained by the link monitor, as well as the communication parameters of the first receiver and the communication parameters of the second transmitter, the first receiver obtains a second communication link target adjustable parameter set, and then adjusts the communication parameters of the second communication link according to the second communication link target adjustable parameter set; in addition, establishing data transmission between the second receiver and the second transmitter and between the third receiver and the third transmitter through the multiplexing and demultiplexing device; wherein the communication parameters of the first communication link comprise communication parameters of the first transmitter and communication parameters of the second receiver, and the communication parameters of the second communication link comprise communication parameters of the first receiver and communication parameters of the second transmitter.
Further, a first communication link target adjustable parameter set comprising a second receiver target adjustable parameter set and a first transmitter target adjustable parameter set; a second communication link target adjustable parameter set includes a first receiver target adjustable parameter set and a second transmitter target adjustable parameter set.
Further, the host also comprises a first microcontroller and a host link training engine; according to the target adjustable parameter set of the first transmitter, the host link training engine adjusts communication parameters of the first transmitter through the first microcontroller; the host link training engine adjusts communication parameters of the first receiver via the first microcontroller according to the first receiver target adjustable parameter set.
Further, the communication parameters of the first transmitter include: the control state of the precoding module in the first transmitter, the compensation coefficient of the DPD in the first transmitter, the equalization coefficient of the FFE in the first transmitter, the gain of the driver in the first transmitter and the swing of the driver in the first transmitter.
Further, the communication parameters of the first receiver include: the equalization coefficients of the CTLE in the first receiver, the equalization coefficients of the VGA in the first receiver, the equalization coefficients of the FFE in the first receiver, the equalization coefficients of the DFE in the first receiver, the control state of the MLSD in the first receiver, and the control state of the pre-decoding module in the first receiver.
Further, the full-timing FFP further comprises a second microcontroller and a CMIS link training engine; according to the target adjustable parameter set of the second transmitter, the CMIS link training engine adjusts communication parameters of the second transmitter through the second microcontroller; the CMIS link training engine adjusts communication parameters of the second receiver via the second microcontroller based on the second receiver target adjustable parameter set.
Further, the communication parameters of the second transmitter include: the control state of the precoding module in the second transmitter, the compensation coefficient of the DPD in the second transmitter, the equalization coefficient of the FFE in the second transmitter, the gain of the driver in the second transmitter and the swing of the driver in the second transmitter.
Further, the communication parameters of the second receiver include: the equalization coefficients of the CTLE in the second receiver, the equalization coefficients of the VGA in the second receiver, the equalization coefficients of the FFE in the second receiver, the equalization coefficients of the DFE in the second receiver, the control state of the MLSD in the second receiver, and the control state of the pre-decoding module in the second receiver.
Further, the second microcontroller adjusts the communication parameters of the second transmitter and the communication parameters of the second receiver by multiplexing and de-multiplexing.
Further, transmitting the second transmitter target adjustable parameter set to the CMIS link training engine over the first communication link; the first transmitter target adjustable parameter set is sent to the host link training engine over the second communication link.
The technical scheme of the invention has the following beneficial technical effects:
In the host and full-timing FFP communication scenario, the compensation scheme of the high-speed link can be optimized for different link conditions, so that the energy efficiency ratio of the communication scheme is optimal.
Furthermore, other advantageous effects that the present invention has will be mentioned in the specific embodiments.
Drawings
FIG. 1 is a schematic diagram of a host in communication with a full-time FFP;
FIG. 2 is a flow chart of a method of host to full-time FFP communication;
Fig. 3 is a graph of energy efficiency versus insertion loss for different channels for a SerDes system.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to clearly describe the technical solution of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and effect. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.
In the drawings of the present invention, solid lines generally represent data interactions between sub-modules within a module, and dashed lines represent data interactions across modules. The solid line and the dotted line are independent of each other and are not mutually crossed and interconnected.
Fig. 1 is a schematic diagram of a host communicating with a full-time FFP. The host includes a first transmitter and a first receiver, and the full-time FFP includes a second transmitter, a second receiver, a third transmitter, a third receiver, and a multiplexing and de-multiplexing device. In addition, the host also comprises a first microcontroller and a host link training engine; the full-timing FFP further includes a second microcontroller and a Common Management Interface Specification (CMIS) link training engine.
In the invention, a first transmitter, a first receiver, a first microcontroller and a host link training engine all belong to a host transceiver. The host also includes a host control interface, and the host also includes an Application-specific integrated Circuit (ASIC) of the host, a central processor (Central Processing Unit, CPU) of the host, or a graphics processor (Graphic Processing Unit, GPU) of the host.
Data interaction can be performed between the first microcontroller and the first transmitter, the first receiver, and the host link training engine. For the first transmitter and the first receiver, the first microcontroller may acquire communication parameters of the first transmitter and communication parameters of the first receiver, and the host link training engine may adjust the communication parameters of the first transmitter and the communication parameters of the first receiver through the first microcontroller.
In addition, the ASIC of the host and the host transceiver can perform data interaction, and can also perform data interaction with the host control interface.
The second microcontroller may interact with the CMIS link training engine, the CPU in the full retime FFP, and the multiplexing and de-multiplexing device.
The second microcontroller adjusts the communication parameters of the second transmitter and the communication parameters of the second receiver by multiplexing and de-multiplexing.
For example, data may be sent to the CMIS link training engine by the CPU and the second microcontroller in the retime FFP, such as various parameters may be communicated thereby.
Alternatively, the CPU in the full retiming FFP may also be replaced with one microcontroller.
The third transmitter and the third receiver interact with the subsequent system, such as transmitting data to the subsequent system or receiving data.
Fig. 2 is a flow chart of a method of communicating a host with a full-time FFP. The communication method of the host and the full-time FFP in the invention comprises the following steps: a first communication link is established between the first transmitter and the second receiver and a second communication link is established between the second transmitter and the first receiver.
And the second receiver obtains a first communication link target adjustable parameter set according to the signal-to-noise ratio or/and the error rate of the first communication link obtained by the link monitor, the communication parameters of the second receiver and the communication parameters of the first transmitter, and then adjusts the communication parameters of the first communication link according to the first communication link target adjustable parameter set.
And according to the signal-to-noise ratio or/and the error rate of the second communication link obtained by the link monitor, the communication parameters of the first receiver and the communication parameters of the second transmitter, the first receiver obtains a second communication link target adjustable parameter set, and then adjusts the communication parameters of the second communication link according to the second communication link target adjustable parameter set.
Further, the communication parameters of the first communication link include communication parameters of the first transmitter and communication parameters of the second receiver, and the communication parameters of the second communication link include communication parameters of the first receiver and communication parameters of the second transmitter.
Further, data transmission between the second receiver and the second transmitter and between the third receiver and the third transmitter is established by the multiplexing and demultiplexing device.
Further, according to the target adjustable parameter set of the first transmitter, the host link training engine adjusts communication parameters of the first transmitter through the first microcontroller; the host link training engine adjusts communication parameters of the first receiver via the first microcontroller according to the first receiver target adjustable parameter set.
In the present invention, the term "first communication link target adjustable parameter set" specifically means: a set of communication parameters that minimize the communication power consumption of the first communication link but meet the communication system requirements regarding communication accuracy can be adjusted. The term "second receiver target adjustable parameter set" refers to: a first communication link target adjustable parameter set located in a second receiver; the term "first transmitter target adjustable parameter set" refers to: a first communication link target adjustable parameter set located in a first transmitter.
In the present invention, the term "second communication link target adjustable parameter set" specifically means: a set of communication parameters that minimize the communication power consumption of the second communication link but which meet the communication system requirements with respect to communication accuracy can be adjusted. The term "first receiver target adjustable parameter set" refers to: a second communication link target adjustable parameter set located in the first receiver; the term "second transmitter target adjustable parameter set" refers to: a second communication link target adjustable parameter set located in a second transmitter.
In the present invention, the terms "pre-decoding", "pre-encoding" are conventional technical terms in the art.
In the present invention, the term "control state of the pre-decoding module" means that the pre-decoding module has two control states of on and off. The control state of the pre-decoding module can be controlled by a pre-decoding enable signal and a pre-decoding shut-down signal.
In the present invention, the term "control state of a precoding module" refers to two control states of on and off of the precoding module. The control state of the precoding module can be controlled by a precoding enable signal and a precoding shut-off signal.
Further, the communication parameters of the first transmitter include: the control state of the precoding module in the first transmitter, the compensation coefficient of the digital predistortion module (DIGITAL PRE-Distortion, DPD) in the first transmitter, the equalization coefficient of the feed forward equalizer (Forward Feedback Equalizer, FFE) in the first transmitter, the gain of the driver in the first transmitter and the swing of the driver in the first transmitter.
Further, the communication parameters of the first receiver include: equalization coefficients of a Continuous Time Linear Equalizer (CTLE) in the first receiver, equalization coefficients of a Variable gain amplifier (Variable GAIN AMPLIFIER, VGA) in the first receiver, equalization coefficients of a FFE in the first receiver, equalization coefficients of a decision feedback Equalizer (Decision Forward Equalizer, DFE) in the first receiver, control states of a maximum likelihood sequence detector (Maximum Likelihood Sequence Detector, MLSD) in the first receiver, and control states of a pre-decoding module in the first receiver.
Further, the communication parameters of the second transmitter include: the control state of the precoding module in the second transmitter, the compensation coefficient of the DPD in the second transmitter, the equalization coefficient of the FFE in the second transmitter, the gain of the driver in the second transmitter and the swing of the driver in the second transmitter.
Further, the communication parameters of the second receiver include: the equalization coefficients of the CTLE in the second receiver, the equalization coefficients of the VGA in the second receiver, the equalization coefficients of the FFE in the second receiver, the equalization coefficients of the DFE in the second receiver, the control state of the MLSD in the second receiver, and the control state of the pre-decoding module in the second receiver.
In the invention, the CMIS link training engine adjusts communication parameters of the second transmitter through the second microcontroller according to the target adjustable parameter set of the second transmitter; the CMIS link training engine adjusts communication parameters of the second receiver via the second microcontroller based on the second receiver target adjustable parameter set.
Further, transmitting the second transmitter target adjustable parameter set to the CMIS link training engine over the first communication link; the first transmitter target adjustable parameter set is sent to the host link training engine over the second communication link.
Numerous specific details are set forth in the above description in order to provide a better illustration of the invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, well known methods, procedures, components, and circuits have not been described in detail so as not to obscure the present invention.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (1)
1. A method of communicating a host with a full-time FFP, the host including a first transmitter and a first receiver, the full-time FFP including a second transmitter, a second receiver, a third transmitter, a third receiver, and a multiplexing and de-multiplexing device, the method comprising the steps of:
Establishing a first communication link between a first transmitter and a second receiver, and establishing a second communication link between the second transmitter and the first receiver;
The second receiver obtains the signal-to-noise ratio or/and the error rate of the first communication link through the link monitor, and the communication parameters of the second receiver and the communication parameters of the first transmitter, obtains a first communication link target adjustable parameter set, and adjusts the communication parameters of the first communication link according to the first communication link target adjustable parameter set;
The first receiver obtains the signal-to-noise ratio or/and the error rate of the second communication link through the link monitor, and the communication parameters of the first receiver and the communication parameters of the second transmitter, obtains a second communication link target adjustable parameter set, and adjusts the communication parameters of the second communication link according to the second communication link target adjustable parameter set; in addition, in the case of the optical fiber,
Establishing data transmission between the second receiver and the second transmitter and between the third receiver and the third transmitter through the multiplexing and de-multiplexing device; wherein,
The communication parameters of the first communication link include communication parameters of the first transmitter and communication parameters of the second receiver, and the communication parameters of the second communication link include communication parameters of the first receiver and communication parameters of the second transmitter;
A first communication link target adjustable parameter set comprising a second receiver target adjustable parameter set and a first transmitter target adjustable parameter set;
A second communication link target adjustable parameter set comprising a first receiver target adjustable parameter set and a second transmitter target adjustable parameter set;
the host also comprises a first microcontroller and a host link training engine;
According to the target adjustable parameter set of the first transmitter, the host link training engine adjusts communication parameters of the first transmitter through the first microcontroller;
according to the target adjustable parameter set of the first receiver, the host link training engine adjusts communication parameters of the first receiver through the first microcontroller;
The communication parameters of the first transmitter include: the control state of the precoding module in the first transmitter, the compensation coefficient of the DPD in the first transmitter, the equalization coefficient of the FFE in the first transmitter, the gain of the driver in the first transmitter and the swing of the driver in the first transmitter;
The communication parameters of the first receiver include: the method comprises the steps of equalizing coefficients of CTLEs in a first receiver, equalizing coefficients of VGAs in the first receiver, equalizing coefficients of FFEs in the first receiver, equalizing coefficients of DFEs in the first receiver, control states of MLSDs in the first receiver and control states of a pre-decoding module in the first receiver;
the full-timing FFP further comprises a second microcontroller and a CMIS link training engine;
according to the target adjustable parameter set of the second transmitter, the CMIS link training engine adjusts communication parameters of the second transmitter through the second microcontroller;
according to the target adjustable parameter set of the second receiver, the CMIS link training engine adjusts communication parameters of the second receiver through the second microcontroller;
The communication parameters of the second transmitter include: the control state of the precoding module in the second transmitter, the compensation coefficient of the DPD in the second transmitter, the equalization coefficient of the FFE in the second transmitter, the gain of the driver in the second transmitter and the swing of the driver in the second transmitter;
The communication parameters of the second receiver include: the equalization coefficients of the CTLE in the second receiver, the equalization coefficients of the VGA in the second receiver, the equalization coefficients of the FFE in the second receiver, the equalization coefficients of the DFE in the second receiver, the control state of the MLSD in the second receiver, and the control state of the pre-decoding module in the second receiver;
The second microcontroller adjusts the communication parameters of the second transmitter and the communication parameters of the second receiver through the multiplexing and de-multiplexing device;
transmitting the second transmitter target adjustable parameter set to the CMIS link training engine over the first communication link;
Transmitting the first transmitter target adjustable parameter set to a host link training engine through a second communication link;
The first communication link target adjustable parameter set and the second communication link target adjustable parameter set are a group of communication parameters which respectively enable the communication power consumption of the first communication link and the second communication link to be the lowest, but can meet the communication accuracy requirement.
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| CN111711459B (en) * | 2020-07-06 | 2021-08-31 | 中国科学院微电子研究所 | A transmitter-driven equalization device, a transmitter-driven equalization method, and an electronic device |
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