1. A communication data compression method for an electric energy meter is characterized by being applied to the electric energy meter and comprising the following steps:

acquiring a periodic meter reading instruction sent by a master station;

searching load data in a time period based on the meter reading instruction;

compressing the load data according to a preset rule to obtain return data, specifically:

reading a first piece of load data and caching the first piece of load data into a first cache;

reading adjacent second piece of load data, caching the second piece of load data into a second cache, and comparing register data information in the first cache and the second cache, wherein the preset rule is as follows:

if the time value of the time register in the second cache is equal to the time value of the time register in the first cache plus the load period value, the time value of the time register in the second cache is represented by a preset field;

if the value of the register x in the second cache is the same as that of the register x in the first cache, the register x in the second cache is represented by the preset field;

reading a third piece of load data and caching the third piece of load data into a third cache, comparing register data information in the second cache and the third cache, and sequentially compressing the load data by adopting the preset rule until the return data is obtained;

and sending the return data to the master station.

2. The electric energy meter communication data compression method according to claim 1, wherein the load data is searched within a time period based on the meter reading instruction, and specifically:

obtaining a time threshold range through the meter reading instruction;

and searching the load data within the time threshold range.

3. An electric energy meter communication data compression system is applied to an electric energy meter, and the system comprises:

the acquisition module is used for acquiring a periodic meter reading instruction sent by the master station;

the searching module is used for searching load data in a time period based on the meter reading instruction;

the compression module is used for compressing the load data according to a preset rule to obtain return data;

and the sending module is used for sending the data to the master station according to a preset rule.

4. The electric energy meter communication data compression system according to claim 3, wherein the total load data is searched within a time period based on the meter reading instruction, and specifically:

obtaining a time threshold range through the meter reading instruction;

obtaining the time period based on the time threshold range;

searching the load data during the time period.

5. The electric energy meter communication data compression system according to claim 3, wherein the load data is compressed according to a preset rule to obtain return data, specifically:

reading a first piece of load data and caching the first piece of load data into a first cache;

reading adjacent second piece of load data, caching the second piece of load data into a second cache, and comparing register data information in the first cache and the second cache, wherein the preset rule is as follows:

if the time value of the time register in the second cache is equal to the time value of the time register in the first cache plus the load period value, the time value of the time register in the second cache is represented by a preset field;

if the value of the register x in the second cache is the same as that of the register x in the first cache, the register x in the second cache is represented by the preset field;

and reading the third piece of load data and caching the third piece of load data into a third cache, comparing register data information in the second cache and the third cache, and sequentially compressing the load data by adopting the preset rule until the return data is obtained.

6. A communication data compression method for an electric energy meter is applied to a master station, and comprises the following steps:

sending a periodic meter reading instruction to the electric energy meter according to a preset time threshold;

acquiring return data obtained by compressing the load data by the electric energy meter according to a preset rule;

and periodically reversely analyzing the returned data based on the preset rule to obtain the load data.

7. The electric energy meter communication data compression method according to claim 6, wherein the sending of the periodic meter reading instruction according to the preset time threshold specifically comprises:

acquiring a load cycle;

obtaining the time threshold range based on the load cycle;

and sending a periodic meter reading instruction to the electric energy meter according to the time threshold range.

8. The electric energy meter communication data compression method according to claim 7, wherein the load data is obtained by periodically and reversely analyzing the return data based on the preset rule, and specifically comprises:

reading register data information between adjacent caches until the returned data is obtained through analysis, wherein the adjacent caches are respectively marked as a first cache and a second cache;

if the register x in the second cache is represented by a preset field, the register x in the second cache is the same as the register x in the first cache;

if the time value of the time register in the second cache is represented by the preset field, it is indicated that the time value of the time register in the second cache is equal to the sum of the time value of the time register in the first cache and the duty cycle value.

9. An electric energy meter communication data compression system is applied to a master station, and the system comprises:

the sending module is used for sending a periodic meter reading instruction to the electric energy meter according to a preset time threshold;

the acquisition module is used for acquiring return data obtained by compressing the load data by the electric energy meter according to a preset rule;

and the analysis module is used for periodically and reversely analyzing the returned data based on the preset rule to obtain the load data.

10. The electric energy meter communication data compression system according to claim 9, wherein the sending of the periodic meter reading instruction according to the preset time threshold specifically comprises:

acquiring a load cycle;

obtaining the time threshold range based on the load cycle;

and sending a periodic meter reading instruction to the electric energy meter according to the time threshold range.

Background

An electric energy meter is an instrument for measuring electric energy, also called watt-hour meter, fire meter, kilowatt-hour meter, and refers to instruments for measuring various electric quantities.

Along with the rapid development of the economy of China, the demand of various industries on electricity is increasingly greater, the phenomenon of unbalanced electricity consumption at different time is increasingly serious, in order to relieve the increasingly sharp contradiction between the supply and demand of electricity in China, adjust the load curve, improve the phenomenon of unbalanced electricity consumption, comprehensively implement the time-sharing price system of peak, flat and valley, carry out peak clipping and valley filling, improve the electricity utilization efficiency of the whole country and reasonably utilize the electricity resources, the electric power departments of part of provinces and cities in China have started to gradually develop multi-rate electric energy meters, the method comprises the steps that the electricity consumption of a user is charged in a time-sharing mode, in the working process of the electric energy meter, the electric energy meter generates a large amount of load data every day, a background master station system needs to copy and read the data every day, not only is more flow consumed, but also a large amount of time is consumed, and the existing communication data compression methods comprise time-based compression, LZ-coding-based compression, source code and anti-code mixed compression and the like.

However, the disadvantages of the prior art are also evident, for example: one of the methods only compresses time data, the length of the compressed data is limited, and other data except the time cannot be compressed; the two LZ codes need to establish a coding dictionary in advance, the adopted compression algorithm consumes a large amount of computing power of the intelligent electric meter, and the length of each piece of load data generally does not exceed 200 bytes, so the advantage of the two LZ codes cannot be exerted, and the three LZ codes are applied to the intelligent electric meter.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a method and a system for compressing communication data of an electric energy meter, which can solve the problems that the conventional compression algorithm needs to increase both software complexity and computational power consumption, and the data compression rate cannot be effectively improved.

The invention provides a method for compressing communication data of an electric energy meter, which is applied to a master station and comprises the following steps:

sending a periodic meter reading instruction to the electric energy meter according to a preset time threshold;

acquiring return data obtained by compressing the load data by the electric energy meter according to a preset rule;

and periodically reversely analyzing the returned data based on the preset rule to obtain the load data.

In this scheme, the sending of the periodic meter reading instruction according to the preset time threshold specifically includes:

acquiring a load cycle;

obtaining the time threshold range based on the load cycle;

and sending a periodic meter reading instruction to the electric energy meter according to the time threshold range.

In this scheme, the periodically and reversely parsing the returned data based on the preset rule to obtain the load data specifically includes:

reading register data information between adjacent caches until the returned data is obtained through analysis, wherein the adjacent caches are respectively marked as a first cache and a second cache;

if the register x in the second cache is represented by a preset field, the register x in the second cache is the same as the register x in the first cache;

if the time value of the time register in the second cache is represented by the preset field, it is indicated that the time value of the time register in the second cache is equal to the sum of the time value of the time register in the first cache and the duty cycle value.

The invention provides an electric energy meter communication data compression system in a second aspect, which is applied to a master station, and comprises:

the sending module is used for sending a periodic meter reading instruction to the electric energy meter according to a preset time threshold;

the acquisition module is used for acquiring return data obtained by compressing the load data by the electric energy meter according to a preset rule;

and the analysis module is used for periodically and reversely analyzing the returned data based on the preset rule to obtain the load data.

In this scheme, the sending of the periodic meter reading instruction according to the preset time threshold specifically includes:

acquiring a load cycle;

obtaining the time threshold range based on the load cycle;

and sending a periodic meter reading instruction to the electric energy meter according to the time threshold range.

In this scheme, the periodically and reversely parsing the returned data based on the preset rule to obtain the load data specifically includes:

reading register data information between adjacent caches until the returned data is obtained through analysis, wherein the adjacent caches are respectively marked as a first cache and a second cache;

if the register x in the second cache is represented by a preset field, the register x in the second cache is the same as the register x in the first cache;

if the time value of the time register in the second cache is represented by the preset field, it is indicated that the time value of the time register in the second cache is equal to the sum of the time value of the time register in the first cache and the duty cycle value.

The invention provides a communication data compression method for an electric energy meter, which is applied to the electric energy meter and comprises the following steps:

acquiring a periodic meter reading instruction sent by a master station;

searching load data in a time period based on the meter reading instruction;

compressing the load data according to a preset rule to obtain return data, specifically:

reading a first piece of load data and caching the first piece of load data into a first cache;

reading adjacent second piece of load data, caching the second piece of load data into a second cache, and comparing register data information in the first cache and the second cache, wherein the preset rule is as follows:

if the time value of the time register in the second cache is equal to the time value of the time register in the first cache plus the load period value, the time value of the time register in the second cache is represented by a preset field;

if the value of the register x in the second cache is the same as that of the register x in the first cache, the register x in the second cache is represented by the preset field;

reading a third piece of load data and caching the third piece of load data into a third cache, comparing register data information in the second cache and the third cache, and sequentially compressing the load data by adopting the preset rule until the return data is obtained;

and sending the return data to the master station.

In this scheme, the searching for load data within a time period based on the meter reading instruction specifically includes:

obtaining a time threshold range through the meter reading instruction;

and searching the load data within the time threshold range.

The fourth aspect of the present invention further provides a communication data compression system for an electric energy meter, which is applied to the electric energy meter, and the system includes:

the acquisition module is used for acquiring a periodic meter reading instruction sent by the master station;

the searching module is used for searching load data in a time period based on the meter reading instruction;

the compression module is used for compressing the load data according to a preset rule to obtain return data;

and the sending module is used for sending the return data to the master station.

In this scheme, the searching for load data within a time period based on the meter reading instruction specifically includes:

obtaining a time threshold range through the meter reading instruction;

and searching the load data within the time threshold range.

In this scheme, compressing the load data according to a preset rule to obtain return data specifically includes:

reading a first piece of load data and caching the first piece of load data into a first cache;

reading adjacent second piece of load data, caching the second piece of load data into a second cache, and comparing register data information in the first cache and the second cache, wherein the preset rule is as follows:

if the time value of the time register in the second cache is equal to the time value of the time register in the first cache plus the load period value, the time value of the time register in the second cache is represented by a preset field;

if the value of the register x in the second cache is the same as that of the register x in the first cache, the register x in the second cache is represented by the preset field;

and reading the third piece of load data and caching the third piece of load data into a third cache, comparing register data information in the second cache and the third cache, and sequentially compressing the load data by adopting the preset rule until the return data is obtained.

According to the electric energy meter communication data compression method and system, the software design complexity is low, the calculated amount is small, and the compressed load data can be recovered; the method has the characteristics of stability and difficulty in mutation based on the load data, and can greatly improve the compression rate; the method can solve the problems that the traditional compression algorithm needs to increase software complexity and increase calculation power consumption, and the data compression rate cannot be effectively improved.

Drawings

Fig. 1 is a flow chart illustrating a method of compressing communication data of an electric energy meter according to an embodiment of the present invention;

FIG. 2 is a block diagram of an embodiment of a communication data compression system for an electric energy meter;

FIG. 3 is a flow chart illustrating a method for compressing communication data of an electric energy meter according to another embodiment of the present invention;

fig. 4 is a block diagram illustrating a communication data compression system of an electric energy meter according to another embodiment of the invention.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Fig. 1 shows a flowchart of a method for compressing communication data of an electric energy meter according to the present invention.

As shown in fig. 1, the present application discloses a method for compressing communication data of an electric energy meter, which is applied to the electric energy meter, and the method includes the following steps:

s102, acquiring a periodic meter reading instruction sent by a master station;

s104, searching load data in a time period based on the meter reading instruction;

s106, compressing the load data according to a preset rule to obtain return data;

and S108, sending the return data to the master station.

It should be noted that the load data in the electric energy meter reflects the power utilization characteristics and power utilization trend of the user, and the power utilization of the user has certain regularity, so the load data has the characteristics of stability and difficulty in sudden change, and based on the characteristics, the data volume in the communication process can be reduced, and the communication efficiency can be improved.

It should be noted that, after the electric energy meter obtains the periodic meter reading instruction sent by the master station, the load data in the electric energy meter is searched in the time period based on the content of the meter reading instruction, the searched load data is compressed according to the preset rule, so as to reduce the communication data volume, and the compressed data is sent to the master station as the return data.

It is worth mentioning that the master station performs reverse operation and analysis according to the same preset rule to obtain the original load data in the electric energy meter.

According to the embodiment of the invention, the load data searching within the time period based on the meter reading instruction specifically comprises the following steps:

obtaining a time threshold range through the meter reading instruction;

and searching the load data within the time threshold range.

It should be noted that the meter reading instruction has a periodic characteristic, a reading time range is from last reading time to current time, the meter reading instruction sent by the master station to the electric energy meter refers to reading a data instruction in a certain time range, the specific time range needs to be obtained first, namely the time threshold range, and the load data is searched in the time threshold range based on the time threshold range.

It is worth mentioning that the load period value is valued according to the congestion condition of the current network, and specifically includes:

identifying a congestion characteristic value of a current communication network;

comparing the congestion characteristic value with a preset characteristic value, wherein,

if the congestion characteristic value is smaller than the preset characteristic value, judging that the current network is in a non-congestion state, and adopting a first acquisition mode;

and if the congestion characteristic value is greater than or equal to the preset characteristic value, judging that the current network is in a congestion state, and adopting a second acquisition mode.

Specifically, the preset characteristic values include parameter characteristics of a packet loss rate, an average queue length, a packet number of overtime retransmission, an average packet delay and a packet delay change, if the current network determines that the current network is in the non-congestion state, the first acquisition mode is adopted, that is, the acquisition frequency is increased, and the load data can be acquired as much as possible within a limited time range by frequent acquisition; and if the current network judges that the congestion state exists, the second acquisition mode is adopted, namely, the acquisition frequency is reduced, and the data loss caused by network congestion is avoided.

It should be noted that the electric energy meter obtains a periodic meter reading instruction sent by the master station, for example, the load data in a time range from "2021-5-100: 00: 00" to "2021-5-100: 59: 00" is read by the master station, and the total load data is four load data, where the current network is in the non-congestion state, and the load period value is "15" minutes.

According to the embodiment of the present invention, the compressing the load data according to the preset rule to obtain the return data specifically includes:

reading a first piece of load data and caching the first piece of load data into a first cache;

reading adjacent second piece of load data, caching the second piece of load data into a second cache, and comparing register data information in the first cache and the second cache, wherein the preset rule is as follows:

if the time value of the time register in the second cache is equal to the time value of the time register in the first cache plus the load period value, the time value of the time register in the second cache is represented by a preset field;

if the value of the register x in the second cache is the same as that of the register x in the first cache, the register x in the second cache is represented by the preset field;

and reading the third piece of load data and caching the third piece of load data into a third cache, comparing register data information in the second cache and the third cache, and sequentially compressing the load data by adopting the preset rule until the return data is obtained.

It should be noted that, by comparing the content of the nth piece of load data with the content of the "n + 1" piece of load data, if the time of the "n + 1" piece of load data is equal to the time of the nth piece of load data plus the load period value, the time data of the "n + 1" piece of load data is replaced by a byte "0 x 00", where the preset field is "0 x 00", the register content "register x" of the "n + 1" piece of load data is equal to the register content "register x" of the nth piece of load data, and the register x "content" register x "of the" n +1 "piece of load data is replaced by a byte" 0x00 ", thereby achieving the purpose of shortening the length of communication data.

It is worth mentioning that the original load data in the electric energy meter is compressed by the preset rule, wherein the electric energy meter reads a first piece of the load data and stores the first piece of the load data in the first cache; the electric energy meter reads a second piece of the load data and stores the second piece of the load data in the second cache, comparing the data value of each register in the second cache with the data of each register in the first cache, if the time value of the time register in the second cache is equal to the time value of the time register in the first cache plus the duty cycle value, the time value of the time register in the second buffer is replaced with the preset field "0 x 00", if the register x contents of the second cache are equal to the register x contents of the first cache, the "register x" content in the second cache is replaced with "0 x 00", and, similarly, according to the preset rule, and the same operation is carried out on the third cache and the fourth cache until all the load data are completely read, so that the final return data is formed.

Fig. 2 is a block diagram illustrating an electric energy meter communication data compression system applied to an electric energy meter according to the present invention.

As shown in fig. 2, the present invention discloses an electric energy meter communication data compression system 20, which is applied to an electric energy meter, and the system includes:

the acquisition module 21 is configured to acquire a periodic meter reading instruction sent by the master station;

the searching module 22 is used for searching load data in a time period based on the meter reading instruction;

the compression module 23 is configured to compress the load data according to a preset rule to obtain return data;

and a sending module 24, configured to send the return data to the master station.

It should be noted that the load data in the electric energy meter reflects the power utilization characteristics and power utilization trend of the user, and the power utilization of the user has certain regularity, so the load data has the characteristics of stability and difficulty in sudden change, and based on the characteristics, the data volume in the communication process can be reduced, and the communication efficiency can be improved.

It should be noted that, after the electric energy meter obtains the periodic meter reading instruction sent by the master station, the load data in the electric energy meter is searched in the time period based on the content of the meter reading instruction, the searched load data is compressed according to the preset rule, so as to reduce the communication data volume, and the compressed data is sent to the master station as the return data.

It is worth mentioning that the master station performs reverse operation and analysis according to the same preset rule to obtain the original load data in the electric energy meter.

According to the embodiment of the invention, the searching of the total load data in the time period based on the meter reading instruction specifically comprises the following steps:

obtaining a time threshold range through the meter reading instruction;

and searching the load data within the time threshold range.

It should be noted that the meter reading instruction has a periodic characteristic, a reading time range is from last reading time to current time, the meter reading instruction sent by the master station to the electric energy meter refers to reading a data instruction in a certain time range, the specific time range needs to be obtained first, namely the time threshold range, and then the load data is searched in the time threshold range.

Fig. 3 shows a flowchart of a method for compressing communication data of an electric energy meter applied to a master station.

As shown in fig. 3, the present application discloses a method for compressing communication data of an electric energy meter, which is applied to a master station, and the method includes the following steps:

s302, sending a periodic meter reading instruction to the electric energy meter according to a preset time threshold;

s304, obtaining return data obtained by compressing the load data by the electric energy meter according to a preset rule;

s306, periodically and reversely analyzing the return data based on the preset rule to obtain the load data.

It should be noted that the load data in the electric energy meter reflects the power utilization characteristics and power utilization trend of the user, and the power utilization of the user has certain regularity, so the load data has the characteristics of stability and difficulty in sudden change, and based on the characteristics, the data volume in the communication process can be reduced, and the communication efficiency can be improved.

It should be noted that, at the end of the master station, a periodic meter reading instruction is sent to the electric energy meter, the master station sends a data reading instruction within a certain time range to the electric energy meter, the electric energy meter can operate according to the meter reading instruction to compress the load data, and then the master station obtains return data obtained by compressing the load data by the electric energy meter according to a preset rule, and reversely analyzes the return data according to the preset rule to obtain the load data of the electric energy meter.

According to the embodiment of the invention, the sending of the periodic meter reading instruction according to the preset time threshold specifically comprises:

acquiring a load cycle;

obtaining the time threshold range based on the load cycle;

and sending a periodic meter reading instruction to the electric energy meter according to the time threshold range.

It should be noted that the reading time range is from the last reading time to the current time, the time range of the time threshold needs to be obtained first, the time span of the time threshold can be known based on the time range, the load period value is further obtained, and then a periodic meter reading instruction is sent to the electric energy meter according to the load period value.

It should be noted that, as shown in table 1, the load period value is "15" minutes, and the master station reads the load data in the time range from "2021-5-100: 00: 00" to "2021-5-100: 59: 00", for a total of "4" pieces of load data.

TABLE 1 load data Table with a target period of fifteen minutes

According to the embodiment of the present invention, the periodically reversely parsing the return data based on the preset rule to obtain the load data specifically includes:

reading register data information between adjacent caches until the returned data is obtained through analysis, wherein the adjacent caches are respectively marked as a first cache and a second cache;

if the register x in the second cache is represented by a preset field, the register x in the second cache is the same as the register x in the first cache;

if the time value of the time register in the second cache is represented by the preset field, it is indicated that the time value of the time register in the second cache is equal to the sum of the time value of the time register in the first cache and the duty cycle value.

It should be noted that after the return data is obtained, the compressed data needs to be reversely analyzed to obtain the original load data, and the return data is reversely analyzed based on the preset rule.

It is worth mentioning that, as shown in table 2, the return data table obtained for the master station, wherein the preset field is "0 x 00", where "x" is a letter or a number.

TABLE 2 the Return data sheet obtained by the Master station

Further, based on table 2, it can be seen that, since the registers and the time values are compressed, the original load data needs to be obtained by reverse parsing according to the preset rule, and table 3 is the original load data table after parsing the return data.

Table 3. original said load data table after said return data analysis

As can be seen from table 3, the original load data can be obtained after reverse parsing based on the preset rule, and the lengthy and same load data value is replaced by the storage amount of a single byte, so that the data amount in the communication process can be greatly reduced, and the communication efficiency can be improved.

Fig. 4 shows a block diagram of a communication data compression system of an electric energy meter applied to a master station.

As shown in fig. 4, the present invention discloses an electric energy meter communication data compression system 40, which is applied to a master station, and the system includes:

the sending module 41 is configured to send a periodic meter reading instruction to the electric energy meter according to a preset time threshold;

the obtaining module 42 is configured to obtain return data obtained by compressing the load data by the electric energy meter according to a preset rule;

and the analysis module 43 is configured to periodically and reversely analyze the return data based on the preset rule to obtain the load data.

It should be noted that, at the end of the master station, a periodic meter reading instruction is sent to the electric energy meter, the master station sends a data reading instruction within a certain time range to the electric energy meter, the electric energy meter can operate according to the meter reading instruction to compress the load data, and then the master station obtains return data obtained by compressing the load data by the electric energy meter according to a preset rule, and reversely analyzes the return data according to the preset rule to obtain the load data of the electric energy meter.

According to the embodiment of the invention, the sending of the periodic meter reading instruction according to the preset time threshold specifically comprises:

acquiring a load cycle;

obtaining the time threshold range based on the load cycle;

and sending a periodic meter reading instruction to the electric energy meter according to the time threshold range.

It should be noted that the reading time range is from the last reading time to the current time, the time range of the time threshold needs to be obtained first, and then a periodic meter reading instruction is sent to the electric energy meter according to the time threshold range.

According to the electric energy meter communication data compression method and system disclosed by the invention, the software design complexity is low, the calculated amount is small, and the compressed load data can be recovered; the method has the characteristics of stability and difficulty in mutation based on the load data, and can greatly improve the compression rate; the method can solve the problems that the traditional compression algorithm needs to increase software complexity and increase calculation power consumption, and the data compression rate cannot be effectively improved.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units; can be located in one place or distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all the functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Alternatively, the integrated unit of the present invention may be stored in a computer-readable storage medium if it is implemented in the form of a software functional module and sold or used as a separate product. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or a part contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic or optical disk, or various other media that can store program code.