CN110166175B - Method, device and network equipment for adaptively configuring pre-emphasis value - Google Patents
Method, device and network equipment for adaptively configuring pre-emphasis value Download PDFInfo
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- CN110166175B CN110166175B CN201910423651.4A CN201910423651A CN110166175B CN 110166175 B CN110166175 B CN 110166175B CN 201910423651 A CN201910423651 A CN 201910423651A CN 110166175 B CN110166175 B CN 110166175B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
- H04L1/0034—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter where the transmitter decides based on inferences, e.g. use of implicit signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0823—Errors, e.g. transmission errors
- H04L43/0847—Transmission error
Abstract
The invention provides a method, a device and network equipment for adaptively configuring a pre-emphasis value. The network equipment comprises a first chip and a second chip, the second chip sends a message to the first chip according to a set of configured pre-emphasis values, the first chip performs CRC detection on the received message, the set of pre-emphasis values comprises a first value, and the first value is used for adjusting the signal amplitude when the second chip sends the message, and the method comprises the following steps: if a CRC error announced by a first chip is received, sequentially traversing a first target value from a preset first value range, wherein the first value range is the value range of a pre-emphasis value of the amplitude of the adjustment signal; updating the first value in the second chip by using the currently traversed first target value; and if the CRC error of the first chip notification is not received within the preset time period, stopping traversing. The invention can adaptively configure the pre-emphasis value and improve the signal transmission quality.
Description
Technical Field
The present invention relates to the field of network communication technologies, and in particular, to a method, an apparatus, and a network device for adaptively configuring a pre-emphasis value.
Background
As the port rate of network equipment increases, the demand for signal transmission rate in the equipment also increases. When high-speed signals are transmitted in equipment, the signals are attenuated continuously along with the increase of frequency and the increase of transmission distance, and the signal transmission quality is influenced.
For this purpose, the pre-emphasis function of a Physical Layer (PHY) chip (signal transmitting end) is usually utilized to compensate the signal attenuation to ensure the signal transmission quality.
At present, the pre-emphasis value of the PHY chip is usually an optimal value at normal temperature, and has a good compensation effect on signal attenuation at normal temperature. However, when the ambient temperature changes greatly, it is difficult to accurately compensate for the signal attenuation after the temperature change using the pre-emphasis value at the normal temperature, and thus there is still a problem that the signal transmission quality is poor.
Disclosure of Invention
In view of the above, the present invention provides a method, an apparatus, and a network device for adaptively configuring a pre-emphasis value to solve the problem of poor signal transmission quality when the ambient temperature changes, so as to ensure the signal transmission quality when the ambient temperature changes.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, the present invention provides a method for adaptively configuring a pre-emphasis value, which is applied to a network device, where the network device includes a first chip and a second chip, the second chip sends a packet to the first chip according to a configured set of pre-emphasis values, the first chip performs Cyclic Redundancy Check (CRC) detection on the received packet, the set of pre-emphasis values includes a first value, and the first value is used to adjust a signal amplitude when the second chip sends the packet, and the method includes:
if a CRC error notified by the first chip is received, sequentially traversing each first target value from a preset first value range, wherein the first value range is a value range of a pre-emphasis value used for adjusting the amplitude of a signal;
updating the first value in the second chip by using the currently traversed first target value so that the second chip adjusts the signal amplitude when sending the message based on the currently traversed first target value;
and if the CRC error of the first chip notification is not received within a preset time period, stopping traversing.
Optionally, the group of pre-emphasis values further includes a second value and a third value, the second value is used to adjust a high-frequency component when the second chip sends a packet, and the third value is used to adjust an edge rate when the second chip sends a packet, where the method further includes:
if the CRC error notified by the first chip is received within a preset time period and all first target values in the first value range are traversed, determining an optimal first target value from the first value range;
updating the first value in the second chip by using the optimal first target value so that the second chip adjusts the signal amplitude when sending the message based on the optimal first target value;
sequentially traversing each second target value from a preset second value range; sequentially traversing each third target value from a preset third value range; the second value range is used for adjusting the pre-emphasis value of the high-frequency component, and the third value range is used for adjusting the pre-emphasis value of the edge rate;
updating the second value in the second chip by using the currently traversed second target value, and updating the third value in the second chip by using the currently traversed third target value, so that the second chip adjusts a high-frequency component when sending a message based on the currently traversed second target value, and adjusts an edge rate when sending the message based on the currently traversed third target value;
and stopping the traversal if the CRC error of the first chip notification is not received within a preset time period.
Optionally, if the CRC error notified by the first chip is received within the preset time period and the first target value in the first value range is traversed, before determining the optimal first target value from the first value range, the method further includes:
for each first target value in the first value range, performing the following operations:
if CRC errors announced by the first chip are received within a preset time period, acquiring a first quantity and a second quantity counted by the first chip, wherein the first quantity is the quantity of messages received by the first chip within the preset time period, and the second quantity is the quantity of messages of which the CRC errors are detected by the first chip within the preset time period;
determining the second number as a percentage of the first number to be a CRC error ratio;
recording the corresponding relation between the CRC error ratio and the current first target value;
if the CRC error notified by the first chip is received within the preset time period and the first target value in the first value range has been traversed, determining an optimal first target value from the first value range, including:
if the CRC errors announced by the first chip are received within a preset time period and the first target values in the first value range are traversed, searching the first target value corresponding to the minimum CRC error ratio from the recorded corresponding relation to serve as the optimal first target value.
Optionally, before sequentially traversing each first target value from within a preset first value range, the method further includes:
if the CRC error notified by the first chip is received, detecting the current ambient temperature;
determining a target temperature section to which the current environment temperature belongs;
acquiring a group of target pre-weighting values corresponding to the target temperature section from the corresponding relation between the locally recorded temperature section and the group of pre-weighting values;
updating a set of pre-emphasis values in the second chip with the set of target pre-emphasis values.
In a second aspect, the present invention provides an apparatus for adaptively configuring a pre-emphasis value, which is applied to a network device, where the network device includes a first chip and a second chip, the second chip sends a packet to the first chip according to a configured set of pre-emphasis values, the first chip performs Cyclic Redundancy Check (CRC) detection on the received packet, the set of pre-emphasis values includes a first value, and the first value is used to adjust a signal amplitude when the second chip sends the packet, and the apparatus includes:
a pre-emphasis value traversing unit, configured to sequentially traverse each first target value from a preset first value range if a CRC error notified by the first chip is received, where the first value range is a value range of a pre-emphasis value used for adjusting a signal amplitude;
a pre-emphasis value updating unit, configured to update the first value in the second chip by using the currently traversed first target value, so that the second chip adjusts the signal amplitude when sending the packet based on the currently traversed first target value;
and the traversal stopping unit is used for stopping traversal if the CRC error of the first chip notification is not received within a preset time period.
Optionally, the set of pre-emphasis values further includes a second value and a third value, where the second value is used to adjust a high-frequency component when the second chip sends a packet, and the third value is used to adjust an edge rate when the second chip sends a packet, and the apparatus further includes:
a pre-emphasis value determination unit, configured to determine, if a CRC error notified by the first chip is received within a preset time period and all first target values within the first value range have been traversed, an optimal first target value from within the first value range;
the pre-emphasis value updating unit is further configured to update the first value in the second chip by using the optimal first target value, so that the second chip adjusts the signal amplitude when sending the packet based on the optimal first target value;
the pre-emphasis value traversing unit is further used for sequentially traversing each second target value from a preset second value range; sequentially traversing each third target value from a preset third value range; the second value range is used for adjusting the pre-emphasis value of the high-frequency component, and the third value range is used for adjusting the pre-emphasis value of the edge rate;
the pre-emphasis value updating unit is further configured to update a second value in the second chip by using a currently traversed second target value, and update a third value in the second chip by using a currently traversed third target value, so that the second chip adjusts a high-frequency component when a message is sent based on the currently traversed second target value, and adjusts an edge rate when the message is sent based on the currently traversed third target value;
and the traversal stopping unit is used for stopping traversal if the CRC error of the first chip notification is not received within a preset time period.
Optionally, the apparatus further comprises:
a quantity obtaining unit, configured to obtain a first quantity and a second quantity counted by a first chip if a CRC error notified by the first chip is received within a preset time period, where the first quantity is a quantity of messages received by the first chip within the preset time period, and the second quantity is a quantity of messages in which the CRC error is detected by the first chip within the preset time period;
a proportion determining unit, configured to determine, as a CRC error proportion, a percentage of the second number to the first number;
the relation recording unit is used for recording the corresponding relation between the CRC error ratio and the current first target value;
the pre-emphasis value determination unit is specifically configured to, if a CRC error notified by the first chip is received within a preset time period and the first target value within the first value range has been traversed, search, from the recorded correspondence, for a first target value corresponding to a minimum CRC error ratio, as the optimal first target value.
Optionally, the apparatus further comprises:
the temperature detection unit is used for detecting the current environment temperature if the CRC error notified by the first chip is received;
the temperature section determining unit is used for determining a target temperature section to which the current environment temperature belongs;
the device comprises a pre-weighting value acquisition unit, a pre-weighting value acquisition unit and a weighting calculation unit, wherein the pre-weighting value acquisition unit is used for acquiring a group of target pre-weighting values corresponding to a target temperature section from the corresponding relation between the locally recorded temperature section and the group of pre-weighting values;
the pre-emphasis value updating unit is further configured to update a set of pre-emphasis values in the second chip with the set of target pre-emphasis values.
In a third aspect, the invention provides a network device comprising a first chip, a second chip, a processor, and a machine-readable storage medium storing machine-executable instructions executable by the processor, the processor being caused by the machine-executable instructions to: the method for adaptively configuring the pre-emphasis value is realized.
In a fourth aspect, the present invention provides a machine-readable storage medium having stored therein machine-executable instructions that, when executed by a processor, implement the above-described method of adaptively configuring a pre-emphasis value.
As can be seen from the above description, in the present invention, the network device utilizes the characteristic that the environmental temperature change may affect the signal transmission quality, and when the receiving end (first chip) receives a message with poor signal transmission quality, the receiving end (first chip) may detect the CRC error, and when the CRC error notified by the first chip is received, the pre-emphasis value of the sending end (second chip) is adjusted. Because the signal amplitude is a main factor for determining the signal transmission quality, the network device sequentially traverses each pre-emphasis value from the value range of the pre-emphasis value corresponding to the preset amplitude, and updates the pre-emphasis value used for adjusting the amplitude in the second chip by using the traversed pre-emphasis value. If the CRC error notified by the first chip is not received after updating, the adjustment is proved to improve the signal transmission quality, and the traversal is stopped. Therefore, the invention can adaptively configure the pre-emphasis value and improve the signal transmission quality.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart illustrating a method for adaptively configuring a pre-emphasis value according to an embodiment of the present invention;
fig. 2 is a diagram illustrating a pre-emphasis value screening process according to an embodiment of the present invention;
FIG. 3 is a flow chart illustrating an implementation of determining an optimal first target value according to an embodiment of the present invention;
fig. 4 is a diagram illustrating a pre-emphasis value updating process according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram illustrating an apparatus for adaptively configuring a pre-emphasis value according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a hardware structure of a network device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It should be understood that although the terms first, second, third, etc. may be used to describe various information in embodiments of the present invention, the information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, the negotiation information may also be referred to as second information, and similarly, the second information may also be referred to as negotiation information without departing from the scope of embodiments of the present invention. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
The embodiment of the invention provides a method for adaptively configuring a pre-emphasis value. In the method, the network equipment senses the change of the environmental temperature according to the CRC error notified by the receiving end. And when the environmental temperature is determined to be changed, sequentially traversing each pre-emphasis value from a preset value range, and updating the pre-emphasis value of the sending end by using the traversed pre-emphasis value so as to adjust the signal sent by the sending end. And if the CRC error notified by the receiving end is not received within the preset time period, determining that a pre-emphasis value matched with the current ambient temperature is found.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following detailed description of the embodiments of the present invention is performed with reference to the accompanying drawings and specific embodiments:
referring to fig. 1, a flowchart of a method for adaptively configuring a pre-emphasis value according to an embodiment of the present invention is provided. The process is applied to network devices such as switching devices and routers.
The network device includes a first chip and a second chip. Wherein the second chip is configured with a set of pre-emphasis values. And the second chip sends a message to the first chip according to the configured group of pre-emphasis values. Wherein the set of pre-emphasis values comprises a first value, a second value, and a third value, which will not be described herein for the moment.
Here, the first chip and the second chip are only named for convenience of description and are not intended to be limiting. It can be understood that, in the embodiment of the present invention, the second chip is a sending end, and the first chip is a receiving end.
The first chip is used as a receiving end to carry out CRC detection on the received message, and notifies the network equipment when a CRC error is detected.
As shown in fig. 1, the process may include the following steps:
step 101, if a CRC error notified by the first chip is received, the network device sequentially traverses each first target value from a preset first value range.
The ambient temperature of the network device is not constant. When the environmental temperature changes greatly, the signal transmission quality between the first chip and the second chip is affected. If the signal transmission quality is poor, the first chip can detect the CRC error and report the CRC error to the network equipment.
The network device considers that the environmental temperature changes may exist based on the CRC error notified by the first chip, and therefore, the pre-emphasis value in the second chip is adjusted to improve the signal transmission quality and eliminate the CRC error.
Therefore, the network device sequentially traverses each first target value from a preset first value range. Here, the first value range is a value range of a pre-emphasis value for adjusting the amplitude of the signal. It is to be understood that the first range of values is a name for convenience of distinction and is not intended to be limiting.
Here, the first target value is also named for convenience of distinction and is not intended to be limiting.
Step 102, the network device updates the first value in the second chip by using the currently traversed first target value.
Here, the first value is a pre-emphasis value configured in the second chip for adjusting the amplitude of the signal. It is to be understood that the first value is a name for convenience of distinguishing and is not intended to be limiting.
The network device updates the first value in the second chip by using the first target value traversed in step 101, so that the second chip adjusts the signal amplitude when sending the packet based on the currently traversed first target value.
Step 103, if the CRC error of the first chip advertisement is not received within the preset time period, the network device stops traversing.
If the network device does not receive the CRC error notified by the first chip within the preset time period, the adjustment is used for indicating that the signal transmission quality is improved, and the CRC error is eliminated. That is, a set of pre-emphasis values applicable to the current ambient temperature is found, and thus, traversal may be stopped.
If the network device receives the CRC error notified by the first chip within the preset time period, which indicates that the signal transmission quality is still poor after the adjustment, the network device continues to traverse the next first target value, that is, repeatedly execute step 101 to step 103.
Thus, the flow shown in fig. 1 is completed.
As can be seen from the flow shown in fig. 1, in the embodiment of the present invention, the network device senses the ambient temperature change according to the CRC error notified by the first chip. And when the environmental temperature change is sensed, the pre-emphasis values corresponding to the locally preset signal amplitudes are sequentially traversed to adjust the signal amplitude when the second chip sends the message. If the CRC error reported by the first chip is not received after the adjustment, the adjustment is proved to improve the signal transmission quality. I.e. to find a pre-emphasis value suitable for the current ambient temperature. Thereby realizing the self-adaptive configuration of the pre-emphasis value.
Optionally, as an embodiment, if a CRC error notified by the first chip is received within a preset time period and all the first target values in the first value range have been traversed, it is indicated that only the amplitude of the signal is adjusted and the signal transmission quality cannot be guaranteed. For this reason, the embodiment of the present invention further needs to execute the process shown in fig. 2.
Referring to fig. 2, a pre-emphasis value screening process is shown for the embodiment of the present invention. As shown in fig. 2, the process may include the following steps:
step 201, if a CRC error notified by the first chip is received within a preset time period and all first target values within the first value range have been traversed, the network device determines an optimal first target value from the first value range.
The optimal first target value is a pre-emphasis value corresponding to the optimal signal transmission quality obtained when only the signal amplitude is adjusted.
The process of determining the optimal first target value by the network device is described in the following, and is not described herein for the moment.
In step 202, the network device updates the first value in the second chip with the optimal first target value.
The second chip adjusts the signal amplitude when the message is transmitted, based on the optimal first target value.
Step 203, the network device sequentially traverses each second target value from a preset second value range; and from the preset third value range, the network equipment sequentially traverses each third target value.
Here, the second value range is a value range of the pre-emphasis value for adjusting the high-frequency component. The third value range is a value range of a pre-emphasis value used for adjusting the edge rate.
It is to be understood that the terms second value, third value, second target value, and third target value are used merely for convenience of distinguishing and are not intended to be limiting.
In step 204, the network device updates the second value in the second chip by using the currently traversed second target value, and updates the third value in the second chip by using the currently traversed third target value.
Here, the second value is a pre-emphasis value configured in the second chip for adjusting the high-frequency component. The third value is a pre-emphasis value configured in the second chip for adjusting the edge rate. It should be understood that the second value and the third value are only named for convenience of distinguishing and are not used for limitation.
After the updating of the step is completed, the second chip adjusts the high-frequency component when the message is sent based on the currently traversed second target value, and adjusts the edge rate when the message is sent based on the currently traversed third target value.
In step 205, if the CRC error of the first chip advertisement is not received within the preset time period, the network device stops traversing.
In the embodiment of the present invention, after determining the optimal pre-emphasis value (optimal first target value) for adjusting the amplitude of the signal, the network device sequentially traverses each pre-emphasis value (second target value) for adjusting the high-frequency component and each pre-emphasis value (third target value) for adjusting the edge rate. And monitoring the signal transmission quality after each traversal and update. That is, it is monitored whether the CRC error advertised by the first chip is received again.
If the CRC error notified by the first chip is not received within the preset time period, it indicates that a group of pre-emphasis values configured in the current second chip can already meet the signal transmission quality requirement, and therefore, the traversal is stopped.
If all the second target values and the third target values are traversed, but the CRC error still cannot be eliminated, it indicates that the current signal transmission quality is not good, and may not be caused by the environmental temperature change, so that the alarm information may be provided to the outside, so as to facilitate the administrator to process in time.
At this point, the flow shown in fig. 2 is completed.
As can be seen from the flow shown in fig. 2, in the embodiment of the present invention, under the condition that the CRC error cannot be eliminated by adjusting the signal amplitude, the network device continues to traverse the pre-emphasis value corresponding to the high-frequency component and the pre-emphasis value corresponding to the edge rate, and is intended to improve the signal transmission quality by the pre-emphasis value corresponding to the high-frequency component and the pre-emphasis value corresponding to the edge rate.
The following describes a process of determining the optimal first target value by the network device in step 201. Referring to fig. 3, an implementation flow for determining an optimal first target value is shown in the embodiment of the present invention.
As shown in fig. 3, the process may include the following steps:
step 301, if a CRC error notified by the first chip is received within a preset time period, the network device obtains a first quantity and a second quantity counted by the first chip.
Here, the first number is the number of messages received by the first chip in a preset time period. The second number is the number of messages of which the first chip detects the CRC errors in a preset time period. It is to be understood that the terms first and second are used merely for convenience of description and are not intended to be limiting.
The network device continues to monitor the signal transmission quality (monitor whether a CRC error advertised by the first chip is received within a preset time period) after performing step 102 (updating the first value in the second chip with the traversed first target value).
If the CRC error notified by the first chip is received within the preset time period, it indicates that the signal transmission quality requirement cannot be satisfied after the second chip adjusts the signal amplitude based on the current first target value. At this time, the network device acquires the first number and the second number from the first chip.
In step 302, the network device determines the second number as a percentage of the first number as a CRC error ratio.
The CRC error ratio may reflect a transmission quality of the signal adjusted based on the current first target value.
Step 303, the network device records the corresponding relationship between the CRC error ratio and the current first target value.
The network device executes steps 301 to 303 to obtain the CRC error ratio for each first target value.
Step 304, if the CRC error notified by the first chip is received within the preset time period and the first target values within the first value range have all been traversed, the first target value corresponding to the minimum CRC error ratio is searched from the recorded correspondence, and the first target value is used as the optimal first target value.
That is, when the CRC error cannot be removed even after all the first target values have been traversed, the first target value at which the optimal signal transmission quality (the CRC error ratio is the smallest) can be obtained is selected as the optimal first target value.
The flow shown in fig. 3 is completed.
The determination of the optimal first target value can be achieved by the flow shown in fig. 3.
Optionally, as an embodiment, before performing step 101, the network device may further perform the flow shown in fig. 4. Referring to fig. 4, a pre-emphasis value updating process is shown for the embodiment of the present invention.
As shown in fig. 4, the process may include the following steps:
in step 401, if the CRC error notified by the first chip is received, the network device detects the current ambient temperature.
As described above, when the network device receives the CRC error notified by the first chip, it may consider that there may be an environmental temperature change.
In the embodiment of the invention, the network equipment directly detects the ambient temperature when sensing the possible ambient temperature change.
In step 402, the network device determines a target temperature segment to which the current ambient temperature belongs.
The embodiment of the invention divides the environment temperature range into a plurality of temperature sections in advance.
When the current ambient temperature is determined in step 401, the temperature segment to which the current ambient temperature belongs may be determined in this step.
Here, the target temperature segment is a temperature segment to which the current ambient temperature belongs. It is to be understood that the reference to the target temperature segment is merely a nomenclature for ease of distinction and is not intended to be limiting.
Step 403, the network device obtains a set of target pre-emphasis values corresponding to the target temperature segment from the correspondence between the locally recorded temperature segment and the set of pre-emphasis values.
The embodiment of the invention can obtain a group of pre-weighting values corresponding to each temperature section in advance through testing.
For example, the network device is placed in an incubator, and the network device is placed in different temperature sections through the incubator. And in each temperature section, setting different pre-emphasis values to control the signal output by the second chip. And then observing the eye pattern of the signal through an oscilloscope, and comparing the eye pattern with a preset eye pattern template to find out the eye pattern with the best quality. And the group of pre-emphasis values corresponding to the eye pattern with the best quality is the group of pre-emphasis values corresponding to the current temperature section. And recording the corresponding relation between the temperature section and the screened group of pre-weighting values.
Through the above process, a set of pre-emphasis values corresponding to each temperature segment can be obtained. Therefore, after the network device determines the target temperature segment to which the current ambient temperature belongs through step 402, a set of target pre-emphasis values corresponding to the target temperature segment can be queried through this step.
Here, the set of target pre-emphasis values is a set of pre-emphasis values corresponding to the target temperature segment. It is to be understood that the reference to a set of target pre-emphasis values is a name for ease of distinction and is not intended to be limiting.
In step 404, the network device updates a set of pre-emphasis values in the second chip with a set of target pre-emphasis values.
That is, the network device updates the set of pre-emphasis values in the second chip by using the set of pre-emphasis values corresponding to the temperature segment to which the current ambient temperature belongs.
And the second chip sends a message to the first chip according to the updated pre-emphasis value. Therefore, the adaptive configuration of the pre-emphasis values under different ambient temperatures is realized.
Of course, since the preset pre-emphasis value is determined based on the temperature segment, for example, the pre-emphasis value measured based on the temperature point at the center of the temperature segment is used as the pre-emphasis value of the current temperature segment. Then the pre-emphasis value is not sufficiently accurate as the pre-emphasis value for other temperature points within the same temperature segment and CRC errors may still be detected.
For this reason, the embodiment of the present invention continues to execute step 101 to step 103. It should be noted that, at this time, the first value range may be determined according to pre-emphasis values corresponding to two temperature segments adjacent to the current temperature segment. For example, the pre-emphasis value for the current temperature segment is 64, and the pre-emphasis values for the two temperature segments adjacent to the current temperature segment are 60 and 68, respectively. If there is still a CRC error after updating the corresponding pre-emphasis value in the second chip by 64, the pre-emphasis value can be traversed within the range of 60-68 to eliminate the CRC error.
I.e. fine tuning around a preset pre-emphasis value to screen out a set of pre-emphasis values that best fits the current ambient temperature.
The flow shown in fig. 4 is completed.
As can be seen from the flow shown in fig. 4, in the embodiment of the present invention, the pre-emphasis values corresponding to the temperature segments are preset, so that the configuration efficiency of the pre-emphasis values can be effectively improved.
The method provided by the embodiment of the invention is described by the following specific embodiment:
the first embodiment is as follows:
the Network device includes a Network Processor (NP) chip and a PHY chip. The PHY chip sends messages from other network devices to the NP chip based on the configured set of pre-emphasis values.
Wherein the set of pre-emphasis values comprises: a pre-emphasis value for adjusting the amplitude of the signal, denoted as Swing; the Pre-emphasis value used for adjusting the high-frequency component is marked as Pre; the pre-emphasis value used to adjust the edge rate is noted Post.
Presetting a value range of Swing, such as 0-127, by the network equipment; presetting a value range of Pre, for example, 0-63; the value range of Post is preset, for example, 0-63.
A set of Pre-emphasis values initially configured in the PHY chip is denoted as { Swing1, Pre1, Post1 }. The initial pre-emphasis value is typically a pre-emphasis value at room temperature. For example, Swing1 is 64, Pre1 is 15, and Post1 is 7.
The NP chip carries out CRC detection on the received message, and if CRC errors are detected, the NP chip informs the network equipment.
The network device considers that the current environmental temperature may change based on the CRC error notified by the NP chip. And the network equipment sequentially traverses each Swing from a preset Swing value range (0-127) to update the Swing in the PHY chip.
If the network device does not receive the CRC error notified by the NP chip within the preset time period after updating, a group of pre-emphasis values in the current PHY chip are suitable for the current environment temperature, and the traversal is stopped.
If the network device still receives the CRC error notified by the NP chip within the preset time period after updating, it indicates that a group of pre-emphasis values in the current PHY chip are not suitable for the current environment temperature.
When the network equipment reaches a preset time period, acquiring the total number of messages counted by the NP chip in the time period and the number of messages with CRC errors detected in the time period from the NP chip. And the network equipment determines the CRC error ratio according to the percentage of the number of the messages with the CRC errors in the total number of the messages. And recording the corresponding relation between the CRC error ratio and the Swing traversed currently.
If the network device still cannot eliminate the CRC error after completing traversal of all the Swing within the Swing value range, at this time, the network device already records the correspondence between all the Swing and the CRC error ratio, as shown in table 1.
| Swing | CRC error ratio |
| 0 | 10％ |
| …… | …… |
| 60 | 1％ |
| …… | …… |
| 127 | 20％ |
TABLE 1
The network device searches for the Swing corresponding to the minimum CRC error ratio (1%) from table 1 (60), and updates the Swing in the PHY chip.
The network equipment sequentially traverses each Pre from the value range (0-63) of the Pre; and traversing all the posts in sequence from the value range (0-63) of the posts. And updating the Pre and Post in the PHY chip by using the traversed Pre and Post.
If Pre is equal to 12 and Post is equal to 6, the network device does not receive the CRC error notified by the NP chip any more, which indicates that a set of Pre-emphasis values { Swing is equal to 60, Pre is equal to 12, Post is equal to 6} in the current PHY chip is applicable to the current ambient temperature, and thus the adaptive configuration of the PHY chip is completed.
The description of the first embodiment is completed so far.
Example two:
the network device presets a corresponding relationship between each temperature segment and a set of pre-emphasis values, as shown in table 2.
| Temperature section | A set of pre-emphasis values |
| …… | …… |
| 16℃～20℃ | Swing＝60，Pre＝12，Post＝5 |
| 21℃～25℃ | Swing＝64，Pre＝15，Post＝7 |
| 26℃～30℃ | Swing＝68，Pre＝18，Post＝9 |
| 31℃～35℃ | Swing＝72，Pre＝21，Post＝11 |
| …… | …… |
TABLE 2
The set of Pre-emphasis values currently configured in the PHY chip is { Swing ═ 64, Pre ═ 15, and Post ═ 7 }.
When the network device receives the CRC error notified by the NP chip, the current ambient temperature is detected. If the detected ambient temperature is 26 ℃, the network device queries the table 2, determines that the temperature segment to which the current ambient temperature belongs is 26-30 ℃, and obtains a set of Pre-emphasis values { Swing ═ 68, Pre ═ 18, Post ═ 9} corresponding to the temperature segment. The network device configures the set of pre-emphasis values into the PHY chip.
The PHY chip sends a packet to the NP chip with { Swing ═ 68, Pre ═ 18, and Post ═ 9 }.
If the network device still receives the CRC error notified by the NP chip, it determines that the value range of subsequent traversable Swing is 64 to 72, the value range of Pre is 15 to 21, and the value range of Post is 7 to 11 according to a set of Pre-emphasis values { Swing is 64, Pre is 15, and Post is 7} corresponding to the previous temperature segment (21 to 25 ℃) adjacent to the current temperature segment and a set of Pre-emphasis values { Swing is 72, Pre is 21, and Post is 11} corresponding to the next temperature segment (31 to 35 ℃).
The network device may use the traversal method in the first embodiment to traverse the Swing first and then traverse the Pre and the Post until the network device does not receive the CRC error notified by the NP chip within the preset time. For example, when Swing is 65, Pre is 16, and Post is 8, the network device does not receive the CRC error advertised by the NP chip any more, which indicates that a set of Pre-emphasis values suitable for the current ambient temperature (26 ℃) has been found.
The description of the second embodiment is completed so far.
The method provided by the embodiment of the invention is described above, and the device provided by the embodiment of the invention is described below:
fig. 5 is a schematic structural diagram of an apparatus according to an embodiment of the present invention. The device includes: a pre-emphasis value traversal unit 501, a pre-emphasis value updating unit 502, and a traversal stop unit 503, wherein:
a pre-emphasis value traversing unit 501, configured to sequentially traverse each first target value from a preset first value range if a CRC error notified by the first chip is received, where the first value range is a value range of a pre-emphasis value used for adjusting a signal amplitude;
a pre-emphasis value updating unit 502, configured to update the first value in the second chip by using the currently traversed first target value, so that the second chip adjusts the signal amplitude when sending the packet based on the currently traversed first target value;
the traversal stopping unit 503 is configured to stop traversal if the CRC error advertised by the first chip is not received within a preset time period.
As an embodiment, the set of pre-emphasis values further includes a second value and a third value, the second value is used to adjust a high-frequency component when the second chip sends a packet, and the third value is used to adjust an edge rate when the second chip sends a packet, the apparatus further includes:
a pre-emphasis value determination unit, configured to determine, if a CRC error notified by the first chip is received within a preset time period and all first target values within the first value range have been traversed, an optimal first target value from within the first value range;
the pre-emphasis value updating unit 502 is further configured to update the first value in the second chip by using the optimal first target value, so that the second chip adjusts the signal amplitude when sending the packet based on the optimal first target value;
the pre-emphasis value traversing unit 501 is further configured to sequentially traverse each second target value from a preset second value range; sequentially traversing each third target value from a preset third value range; the second value range is used for adjusting the pre-emphasis value of the high-frequency component, and the third value range is used for adjusting the pre-emphasis value of the edge rate;
the pre-emphasis value updating unit 502 is further configured to update the second value in the second chip by using the currently traversed second target value, update the third value in the second chip by using the currently traversed third target value, so that the second chip adjusts a high-frequency component when sending a packet based on the currently traversed second target value, and adjust an edge rate when sending a packet based on the currently traversed third target value;
the traversal stopping unit 503 is configured to stop traversal if the CRC error advertised by the first chip is not received within a preset time period.
As an embodiment, the apparatus further comprises:
a quantity obtaining unit, configured to obtain a first quantity and a second quantity counted by a first chip if a CRC error notified by the first chip is received within a preset time period, where the first quantity is a quantity of messages received by the first chip within the preset time period, and the second quantity is a quantity of messages in which the CRC error is detected by the first chip within the preset time period;
a proportion determining unit, configured to determine, as a CRC error proportion, a percentage of the second number to the first number;
the relation recording unit is used for recording the corresponding relation between the CRC error ratio and the current first target value;
the pre-emphasis value determination unit is specifically configured to, if a CRC error notified by the first chip is received within a preset time period and the first target value within the first value range has been traversed, search, from the recorded correspondence, for a first target value corresponding to a minimum CRC error ratio, as the optimal first target value.
As an embodiment, the apparatus further comprises:
the temperature detection unit is used for detecting the current environment temperature if the CRC error notified by the first chip is received;
the temperature section determining unit is used for determining a target temperature section to which the current environment temperature belongs;
the device comprises a pre-weighting value acquisition unit, a pre-weighting value acquisition unit and a weighting calculation unit, wherein the pre-weighting value acquisition unit is used for acquiring a group of target pre-weighting values corresponding to a target temperature section from the corresponding relation between the locally recorded temperature section and the group of pre-weighting values;
the pre-emphasis value updating unit 502 is further configured to update a set of pre-emphasis values in the second chip with the set of target pre-emphasis values.
The description of the apparatus shown in fig. 5 is thus completed. In the embodiment of the invention, the network equipment senses the change of the environmental temperature according to the CRC error notified by the receiving end. And when the environmental temperature is determined to be changed, sequentially traversing each pre-emphasis value from a preset value range, and updating the pre-emphasis value of the sending end by using the traversed pre-emphasis value so as to adjust the signal sent by the sending end. And if the CRC error notified by the receiving end is not received within the preset time period, determining that a pre-emphasis value matched with the current ambient temperature is found.
The following describes a network device provided in an embodiment of the present invention:
fig. 6 is a schematic diagram of a hardware structure of a network device according to an embodiment of the present invention. The network device may include a first chip 601, a second chip 602, a processor 603, a machine-readable storage medium 604 storing machine-executable instructions. The processor 603 and the machine-readable storage medium 604 may communicate via a system bus 605. Also, the processor 603 may perform the method of adaptively configuring a pre-emphasis value described above by reading and executing machine-executable instructions in the machine-readable storage medium 604 that correspond to the logic of the adaptively configuring a pre-emphasis value.
The machine-readable storage medium 604 referred to herein may be any electronic, magnetic, optical, or other physical storage device that can contain or store information such as executable instructions, data, and the like. For example, the machine-readable storage medium 604 may include at least one of the following: volatile memory, non-volatile memory, other types of storage media. The volatile Memory may be a Random Access Memory (RAM), and the nonvolatile Memory may be a flash Memory, a storage drive (e.g., a hard disk drive), a solid state disk, and a storage disk (e.g., a compact disk, a DVD).
Embodiments of the present invention also provide a machine-readable storage medium, such as machine-readable storage medium 604 in fig. 6, including machine-executable instructions, which are executable by processor 603 in a network device to implement the above-described method for adaptively configuring a pre-emphasis value.
So far, the description of the apparatus shown in fig. 6 is completed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the embodiments of the present invention should be included in the scope of the present invention.
Claims (8)
1. A method for configuring pre-emphasis values in a self-adaptive manner is applied to network equipment, and is characterized in that the network equipment comprises a first chip and a second chip, the second chip sends a message to the first chip according to a configured set of pre-emphasis values, the first chip performs Cyclic Redundancy Check (CRC) detection on the received message, the set of pre-emphasis values comprises a first value, and the first value is used for adjusting signal amplitude when the second chip sends the message, and the method comprises the following steps:
if the CRC error notified by the first chip is received, detecting the current ambient temperature;
determining a target temperature section to which the current environment temperature belongs;
acquiring a group of target pre-emphasis values corresponding to the target temperature section from the corresponding relationship between the locally recorded temperature section and the group of pre-emphasis values;
updating a set of pre-emphasis values in the second chip with the set of target pre-emphasis values;
if the CRC error notified by the first chip is still received, sequentially traversing each first target value from a preset first value range, wherein the first value range is a value range of a pre-emphasis value used for adjusting the amplitude of a signal and is determined according to the pre-emphasis values corresponding to two temperature sections adjacent to the target temperature section;
updating the first value in the second chip by using the currently traversed first target value so that the second chip adjusts the signal amplitude when sending the message based on the currently traversed first target value;
and stopping the traversal if the CRC error of the first chip notification is not received within a preset time period.
2. The method of claim 1, wherein the set of pre-emphasis values further includes a second value for adjusting high frequency components when the second chip sends messages and a third value for adjusting an edge rate when the second chip sends messages, the method further comprising:
if the CRC error notified by the first chip is received within a preset time period and all first target values in the first value range are traversed, determining an optimal first target value from the first value range;
updating the first value in the second chip by using the optimal first target value so that the second chip adjusts the signal amplitude when sending the message based on the optimal first target value;
sequentially traversing each second target value from a preset second value range; sequentially traversing each third target value from a preset third value range; the second value range is used for adjusting the pre-emphasis value of the high-frequency component, and the third value range is used for adjusting the pre-emphasis value of the edge rate;
updating a second value in the second chip by using the currently traversed second target value, and updating a third value in the second chip by using the currently traversed third target value, so that the second chip adjusts a high-frequency component when a message is sent based on the currently traversed second target value, and adjusts an edge rate when the message is sent based on the currently traversed third target value;
and stopping the traversal if the CRC error of the first chip notification is not received within a preset time period.
3. The method of claim 2, wherein if the CRC error advertised by the first chip is received within a predetermined time period and the first target value in the first range of values has been traversed, before determining an optimal first target value from the first range of values, the method further comprises:
for each first target value in the first value range, performing the following operations:
if CRC errors announced by the first chip are received within a preset time period, acquiring a first quantity and a second quantity counted by the first chip, wherein the first quantity is the quantity of messages received by the first chip within the preset time period, and the second quantity is the quantity of messages of which the CRC errors are detected by the first chip within the preset time period;
determining the percentage of the second number to the first number as the CRC error ratio;
recording the corresponding relation between the CRC error ratio and the current first target value;
if the CRC error notified by the first chip is received within the preset time period and the first target value in the first value range has been traversed, determining an optimal first target value from the first value range, including:
if the CRC errors announced by the first chip are received within a preset time period and the first target values in the first value range are traversed, searching the first target value corresponding to the minimum CRC error ratio from the recorded corresponding relation to serve as the optimal first target value.
4. A device for configuring pre-emphasis values in a self-adaptive manner is applied to network equipment, and is characterized in that the network equipment comprises a first chip and a second chip, the second chip sends a message to the first chip according to a set of configured pre-emphasis values, the first chip performs Cyclic Redundancy Check (CRC) detection on the received message, the set of pre-emphasis values comprises a first value, and the first value is used for adjusting signal amplitude when the second chip sends the message, and the device comprises:
the temperature detection unit is used for detecting the current environment temperature if the CRC error notified by the first chip is received;
the temperature section determining unit is used for determining a target temperature section to which the current environment temperature belongs;
the device comprises a pre-weighting value acquisition unit, a pre-weighting value acquisition unit and a weighting calculation unit, wherein the pre-weighting value acquisition unit is used for acquiring a group of target pre-weighting values corresponding to a target temperature section from the corresponding relation between the locally recorded temperature section and the group of pre-weighting values;
a pre-emphasis value updating unit for updating a set of pre-emphasis values in the second chip with the set of target pre-emphasis values;
a pre-emphasis value traversing unit, configured to sequentially traverse each first target value from a preset first value range if a CRC error notified by the first chip is still received, where the first value range is a value range of a pre-emphasis value used for adjusting a signal amplitude, and is determined according to pre-emphasis values corresponding to two temperature segments adjacent to the target temperature segment;
the pre-emphasis value updating unit is configured to update the first value in the second chip by using the currently traversed first target value, so that the second chip adjusts the signal amplitude when sending the packet based on the currently traversed first target value;
and the traversal stopping unit is used for stopping traversal if the CRC error of the first chip notification is not received within a preset time period.
5. The apparatus of claim 4, wherein the set of pre-emphasis values further includes a second value for adjusting high frequency components when the second chip sends messages and a third value for adjusting an edge rate when the second chip sends messages, the apparatus further comprising:
a pre-emphasis value determination unit, configured to determine, if a CRC error notified by the first chip is received within a preset time period and all first target values within the first value range have been traversed, an optimal first target value from within the first value range;
the pre-emphasis value updating unit is further configured to update the first value in the second chip by using the optimal first target value, so that the second chip adjusts the signal amplitude when sending the packet based on the optimal first target value;
the pre-emphasis value traversing unit is further used for sequentially traversing each second target value from a preset second value range; sequentially traversing each third target value from a preset third value range; the second value range is used for adjusting the pre-emphasis value of the high-frequency component, and the third value range is used for adjusting the pre-emphasis value of the edge rate;
the pre-emphasis value updating unit is further configured to update a second value in the second chip by using a currently traversed second target value, and update a third value in the second chip by using a currently traversed third target value, so that the second chip adjusts a high-frequency component when a message is sent based on the currently traversed second target value, and adjusts an edge rate when the message is sent based on the currently traversed third target value;
and the traversal stopping unit is used for stopping traversal if the CRC error announced by the first chip is not received within a preset time period.
6. The apparatus of claim 5, wherein the apparatus further comprises:
a quantity obtaining unit, configured to obtain a first quantity and a second quantity counted by a first chip if a CRC error notified by the first chip is received within a preset time period, where the first quantity is a quantity of messages received by the first chip within the preset time period, and the second quantity is a quantity of messages in which the CRC error is detected by the first chip within the preset time period;
a proportion determining unit, configured to determine, as a CRC error proportion, a percentage of the second number to the first number;
the relation recording unit is used for recording the corresponding relation between the CRC error ratio and the current first target value;
the pre-emphasis value determination unit is specifically configured to, if a CRC error notified by the first chip is received within a preset time period and the first target value within the first value range has been traversed, search, from the recorded correspondence, for a first target value corresponding to a minimum CRC error ratio, as the optimal first target value.
7. A network device comprising a first chip, a second chip, a processor, and a machine-readable storage medium storing machine-executable instructions executable by the processor, the processor being caused by the machine-executable instructions to: carrying out the method steps of any one of claims 1 to 3.
8. A machine-readable storage medium having stored therein machine-executable instructions which, when executed by a processor, perform the method steps of any of claims 1-3.
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