CN104601199B - Method and device for optimizing performance of G3-PLC carrier communication network - Google Patents

Abstract

The invention provides a method for optimizing the performance of a G3-PLC carrier communication network, which comprises the steps of determining the current working frequency band of each carrier device on the G3-PLC carrier communication network; the working frequency bands comprise an A frequency band, an FCC frequency band and an ARIB frequency band; the method comprises the steps of dividing a current working frequency band according to a preset division rule to obtain a plurality of sub-frequency bands, distributing a plurality of corresponding sub-carrier channels for each sub-frequency band, and loading the plurality of sub-carrier channels distributed in each sub-frequency band on corresponding carrier equipment respectively, so that the carrier equipment in the same sub-frequency band can be communicated with each other. By implementing the embodiment of the invention, the problem of performance reduction of the carrier communication network caused by carrier collision when large-scale networking is carried out based on G3-PLC can be solved.

Description

A method and device for optimizing the performance of G3-PLC carrier communication network

technical field

The invention relates to the technical field of power communication networks, in particular to a method and device for optimizing the performance of a G3-PLC carrier communication network.

Background technique

G3-PLC is a global power line communication open protocol specially designed for smart grid communication. It belongs to the Narrow-Band Power Line Communications (NB-PLC) standard and is usually used in automatic meter reading (AMR), energy control and power grid monitoring and other low-speed data communication occasions.

There are three working frequency bands for G3-PLC: A frequency band (35～91KHz), FCC frequency band (10～490KHz) and ARIB frequency band (10～450KHz). For any of the above three working frequency bands, the G3-PLC physical layer adopts OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing technology) method to divide the frequency band into limited subcarrier channels according to the specified bandwidth, such as A frequency band The frequency range is 35 ~ 91KHz, divided according to the width of each subcarrier is 1.5625KHz, resulting in 36 subcarriers, that is, there are 36 subcarrier channels in the A frequency band, so that the carrier equipment can automatically and dynamically according to the attenuation, interference and noise of the line Select those sub-carrier channels with better communication effects for communication.

As a shared media medium, the power line is used in the medium voltage distribution network. The G3-PLC can use the carrier sense conflict detection method to avoid the conflict caused by the carrier devices sending data at the same time on the same line, and the communication response between the carrier devices is delayed. The disadvantage is that once the number of carrier devices increases, carrier conflicts on the G3-PLC carrier communication network will intensify, resulting in a sharp increase in communication delay between carrier devices, thus failing to meet the communication requirements of the distribution network.

Contents of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method and device for optimizing the performance of the G3-PLC carrier communication network, which can solve the problem of carrier communication network performance degradation due to carrier conflicts in large-scale G3-PLC networking. question.

In order to solve the above technical problems, an embodiment of the present invention provides a method for optimizing the performance of a G3-PLC carrier communication network, the method comprising:

Determine the current working frequency band of each carrier device on the G3-PLC carrier communication network; wherein, the working frequency band includes A frequency band, FCC frequency band and ARIB frequency band;

Divide the determined current working frequency band according to the preset division rules to obtain a plurality of sub-frequency bands, and assign a corresponding number of sub-carrier channels to each of the obtained sub-frequency bands, and divide each of the sub-frequency bands into The assigned sub-carrier channels are respectively loaded on the corresponding carrier devices, enabling mutual communication between carrier devices in the same sub-frequency band;

Wherein, the determined current working frequency band is divided according to a preset division rule to obtain multiple sub-frequency bands, and a corresponding number of sub-carrier channels are assigned to each of the obtained sub-frequency bands, and each of the obtained Several sub-carrier channels allocated in a sub-frequency band are respectively loaded on corresponding carrier devices, and the specific steps to realize mutual communication between carrier devices in the same sub-frequency band include:

According to the determined current working frequency band, obtain the subcarrier width corresponding to the current working frequency band, and further obtain the frequency corresponding to each subcarrier channel in the current working frequency band;

Assign corresponding channel number parameters to the obtained frequency of each subcarrier channel according to the order of frequency from small to large;

Determine the number of sub-frequency bands and the number of sub-carrier channels contained in each sub-frequency band according to preset division rules, and assign the obtained sub-carrier channel number parameters to corresponding sub-frequency bands;

Load the sub-carrier channel number parameters and their corresponding frequency ranges in each sub-frequency band to the corresponding carrier equipment, and set corresponding effective identifications for the carrier equipment in each sub-frequency band. When the carrier in the same sub-frequency band When the valid identifiers of the devices are the same, the carrier devices in the same sub-band can communicate with each other.

Wherein, the method further includes:

The valid identifiers set on carrier devices in different frequency bands are different.

Wherein, the parameter of the sub-carrier channel number in each sub-frequency band and its corresponding frequency range are loaded on the carrier chip of the corresponding carrier device.

Wherein, the loading of the sub-carrier channel number parameter and its corresponding frequency range in each sub-frequency band to the corresponding carrier device is set through the interface between the CPU and the carrier chip when the carrier chip is powered on and initialized.

The embodiment of the present invention also provides a device for optimizing the performance of the G3-PLC carrier communication network, the device comprising:

A working frequency band determining unit is used to determine the current working frequency band of each carrier device on the G3-PLC carrier communication network; wherein, the working frequency band includes A frequency band, FCC frequency band and ARIB frequency band;

A working frequency band dividing unit, configured to divide the determined current working frequency band according to a preset division rule to obtain a plurality of sub-frequency bands, and assign a corresponding number of sub-carrier channels to each of the obtained sub-frequency bands, and The several sub-carrier channels allocated in each sub-frequency band are respectively loaded on the corresponding carrier devices, so that the carrier devices in the same sub-frequency band can communicate with each other;

Wherein, the working frequency band division unit includes:

A subcarrier channel acquisition module, configured to acquire the subcarrier width corresponding to the current working frequency band according to the determined current working frequency band, and further obtain the frequency corresponding to each subcarrier channel in the current working frequency band;

The channel number parameter allocation module is used to allocate corresponding channel number parameters to the frequency of each subcarrier channel obtained in accordance with the sequence of frequencies from small to large;

The sub-band division and allocation module is used to determine the number of sub-bands and the number of sub-carrier channels contained in each sub-band according to preset division rules, and assign the obtained sub-carrier channel number parameters to corresponding sub-band;

The optimization and communication module is used to load the sub-carrier channel number parameter and its corresponding frequency range in each sub-frequency band to the corresponding carrier equipment, and provide corresponding effective identifications for the carrier equipment in each sub-frequency band, When the effective identifiers of the carrier devices in the same sub-band are the same, the carrier devices in the same sub-band can communicate with each other.

Wherein, the parameter of the sub-carrier channel number in each sub-frequency band and its corresponding frequency range are loaded on the carrier chip of the corresponding carrier device.

Wherein, the loading of the sub-carrier channel number parameter and its corresponding frequency range in each sub-frequency band to the corresponding carrier device is set through the interface between the CPU and the carrier chip when the carrier chip is powered on and initialized.

Implementing the embodiment of the present invention has the following beneficial effects:

In the embodiment of the present invention, at least two sub-frequency bands are generated by dividing the current working frequency band (any one of the A frequency band, the FCC frequency band and the ARIB frequency band) on the G3-PLC, and each sub-frequency band includes several different sub-frequency bands. Carrier channel, since the carrier devices working in different sub-bands have different effective identifications, it will not cause carrier conflicts, so that each carrier device can only send and receive on the sub-carrier channels contained in the sub-frequency band to which it belongs Therefore, the probability of carrier collision in the same sub-band is reduced, and the performance of the carrier communication network is improved, so as to solve the problem of carrier communication network performance degradation caused by carrier collision in G3-PLC large-scale networking.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, obtaining other drawings based on these drawings still belongs to the scope of the present invention without any creative effort.

Fig. 1 is the flowchart of the method for optimizing the performance of G3-PLC carrier communication network provided by the embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a device for optimizing the performance of a G3-PLC carrier communication network provided by an embodiment of the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a method for optimizing the performance of a G3-PLC carrier communication network provided by an embodiment of the present invention, the method includes:

Step S101, determine the current working frequency band of each carrier device on the G3-PLC carrier communication network; wherein, the working frequency band includes A frequency band, FCC frequency band and ARIB frequency band;

The specific process is that the working frequency band on the G3-PLC carrier communication network is pre-planned and designed, and the working frequency band is any one of the A frequency band, the FCC frequency band, and the ARIB frequency band; where the frequency range of the A frequency band is 35KHz ~ 91KHz, The frequency range of the FCC frequency band is 10KHz to 490KHz, and the frequency range of the ARIB frequency band is 10KHz to 450KHz.

Step S102: Divide the determined current working frequency band according to the preset division rules to obtain a plurality of sub-frequency bands, and assign a corresponding number of sub-carrier channels to each of the obtained sub-frequency bands, and divide each Several sub-carrier channels allocated in the sub-frequency band are respectively loaded on the corresponding carrier devices, so that the carrier devices in the same sub-frequency band can communicate with each other.

The specific process is, first, according to the current working frequency band, obtain the subcarrier width corresponding to the current working frequency band, and further obtain the frequency corresponding to each subcarrier channel in the current working frequency band; it should be noted that the width of each subcarrier refers to a single subcarrier The frequency bandwidth occupied by the channel is fixed in the embodiment of the present invention, so the obtained subcarrier channel is also relatively fixed;

Secondly, assign corresponding channel number parameters to the frequency of each sub-carrier channel according to the order of frequency from small to large; The width is 1.5625KHz, and the subcarrier channel number parameter is mapped from 1 to 20. Among them, the subcarrier frequency range with the channel number parameter 1 is the smallest, and the subcarrier frequency range with the channel number parameter 20 is the largest;

Then, according to the preset division rules, determine the number of sub-frequency bands and the number of sub-carrier channels contained in each sub-frequency band, and assign the sub-carrier channel number parameters to the corresponding sub-frequency bands; as an example, given the current working frequency band There are 1 to 20 sub-carrier channel numbers, the current working frequency band can be divided into two sub-frequency bands, each sub-frequency band contains the same number of sub-carrier channels (or different sub-carrier channels), and the sub-carrier channel parameters are the first 10 ( Or 8) is allocated to the first sub-frequency band, and the sub-carrier channel parameter is allocated to the second sub-frequency band after 10 (or 12);

Finally, load the sub-carrier channel number parameter and its corresponding frequency range in each sub-frequency band to the corresponding carrier device, and set corresponding effective identifications for the carrier devices in each sub-frequency band. When they are in the same sub-frequency band When the effective identifiers of the inner carrier devices are the same, the carrier devices in the same sub-frequency band can communicate with each other.

Specifically, according to the sub-carrier channel number parameters allocated in each sub-frequency band, the frequency range of each sub-frequency band can be determined. In order to achieve mutual communication between carrier devices in the same sub-frequency band, it is necessary to set the The channel number parameter is set on the corresponding carrier device, which can be directly loaded on the carrier chip of the carrier device, and can also be set through the interface between the CPU and the carrier chip when the carrier chip is powered on and initialized;

Since the frequency domain position of the sub-carrier channel corresponding to each sub-carrier channel number is fixed, it is possible to flexibly configure whether each sub-carrier channel number is valid to determine the sub-frequency band, so that the configuration can realize discrete rather than continuous multiple sub-frequency bands Combination, so that when the effective identifiers of the carrier devices in the same sub-band are the same, the carrier devices in the same sub-band can communicate with each other.

It should be noted that the carrier equipment in the same sub-frequency band can automatically and dynamically select according to the attenuation, interference and noise conditions of each sub-carrier channel in the sub-frequency band, and obtain the sub-carrier channel with better communication effect for communication.

It can be understood that different sub-frequency bands can be distinguished only if the effective identifiers on the carrier devices in different frequency bands are different, so that the carrier devices in each sub-band form their own relatively independent small networks for communication.

In the embodiment of the present invention, the processing flow of the carrier chip of the carrier device is as follows: 1. At the transmitting end, the data information is processed by scrambling, encoding, interleaving, modulation mapping, etc. to generate data symbols, which are input to IFFT (Inverse Fast Fourier Transformation, Inverse Fast Fourier Transformation) Liye transform) module to obtain the corresponding time-domain signal, after adding a cyclic prefix to the time-domain signal, it is sent to the channel through digital-to-analog conversion; 2. After corresponding inverse processing at the receiving end, the received signal can be Converted into data information, so as to realize the communication of the carrier device on the line with better communication effect in the sub-carrier channel mapped by the set sub-frequency range.

As an example, divide the working frequency from 35KHz to 91KHz in the A frequency band to generate 36 subcarriers, and assign values to the channel number parameters of the 36 subcarriers in ascending order. At this time, divide them into two subfrequency bands according to the division rules, so that A sub-frequency band includes 18 sub-carriers, including sub-carrier channel number parameters from 1 to 18 in the range of the previous sub-frequency band (35KHz, 63KHz), and sub-carrier channel numbers from 19 to 36 in the latter sub-frequency band [63KHz, 91KHz). Carrier channel number parameter;

Assign the frequency range (35KHz, 63KHz) of the previous sub-band and the sub-carrier channel number parameters from 1 to 18 to the corresponding carrier equipment, and assign the frequency range [63KHz, 91KHz) of the latter sub-band and the sub-carrier channel numbers including 19 to 36 The carrier channel number parameter is assigned to other corresponding carrier devices. By setting an effective identifier 1 on each carrier device in the previous sub-band and setting an effective identifier 0 on each carrier device in the next sub-band, the two sub-bands are distinguished. Communication between the various carrier devices within. Of course, the two sub-frequency bands can also be set with the same effective identifier 1, so that the communication between the carrier devices in the two sub-frequency bands will not interfere with each other.

As shown in Figure 2, a device for optimizing the performance of a G3-PLC carrier communication network provided by an embodiment of the present invention, the device includes:

The operating frequency band determining unit 110 is used to determine the current operating frequency band of each carrier device on the G3-PLC carrier communication network; wherein, the operating frequency band includes the A frequency band, the FCC frequency band and the ARIB frequency band;

The working frequency band division unit 120 is configured to divide the determined current working frequency band according to a preset division rule to obtain a plurality of sub-frequency bands, and assign a corresponding number of sub-carrier channels to each of the obtained sub-frequency bands, and The several sub-carrier channels allocated in each sub-frequency band are respectively loaded on the corresponding carrier devices, so that the carrier devices in the same sub-frequency band can communicate with each other.

Wherein, the working frequency band division unit 120 includes:

The subcarrier channel acquisition module 1201 is configured to acquire the subcarrier width corresponding to the current working frequency band according to the determined current working frequency band, and further obtain the frequency corresponding to each subcarrier channel in the current working frequency band;

The channel number parameter allocation module 1202 is configured to allocate corresponding channel number parameters to the frequency of each subcarrier channel obtained in accordance with the sequence of frequencies from small to large;

The sub-frequency band division and allocation module 1203 is used to determine the number of sub-frequency bands and the number of sub-carrier channels contained in each sub-frequency band according to preset division rules, and assign the obtained sub-carrier channel number parameters to corresponding sub-band;

The optimization and communication module 1204 is used to load the sub-carrier channel number parameter and its corresponding frequency range in each sub-frequency band to the corresponding carrier device, and provide corresponding effective identifications for the carrier devices in each sub-frequency band , when the effective identifiers of the carrier devices in the same sub-band are the same, the carrier devices in the same sub-band can communicate with each other.

Wherein, the sub-carrier channel number parameter and its corresponding frequency range in each sub-frequency band are loaded on the carrier chip of the corresponding carrier device.

Wherein, loading the sub-carrier channel number parameter and its corresponding frequency range in each sub-frequency band to the corresponding carrier device is set through the interface between the CPU and the carrier chip when the carrier chip is powered on and initialized.

Implementing the embodiment of the present invention has the following beneficial effects:

In the embodiment of the present invention, at least two sub-frequency bands are generated by dividing the current working frequency band (any one of the A frequency band, the FCC frequency band and the ARIB frequency band) on the G3-PLC, and each sub-frequency band includes several different sub-frequency bands. Carrier channel, since the carrier devices working in different sub-bands have different effective identifications, it will not cause carrier conflicts, so that each carrier device can only send and receive on the sub-carrier channels contained in the sub-frequency band to which it belongs Therefore, the probability of carrier collision in the same sub-band is reduced, and the performance of the carrier communication network is improved, so as to solve the problem of carrier communication network performance degradation caused by carrier collision in G3-PLC large-scale networking.

It is worth noting that in the above-mentioned device embodiments, each device unit included is only divided according to functional logic, but is not limited to the above-mentioned division, as long as the corresponding functions can be realized; in addition, the specific functions of each functional unit The names are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the present invention.

Those of ordinary skill in the art can understand that all or part of the steps in the method of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage Media such as ROM/RAM, magnetic disk, optical disk, etc.

The above disclosure is only a preferred embodiment of the present invention, which certainly cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims (7)

1. a method for optimizing G3-PLC carrier communication network performance, is characterized in that, described method comprises: Determine the current working frequency band of each carrier device on the G3-PLC carrier communication network; wherein, the working frequency band includes A frequency band, FCC frequency band and ARIB frequency band; Divide the determined current working frequency band according to the preset division rules to obtain a plurality of sub-frequency bands, and assign a corresponding number of sub-carrier channels to each of the obtained sub-frequency bands, and divide each of the sub-frequency bands into The assigned sub-carrier channels are respectively loaded on the corresponding carrier devices, enabling mutual communication between carrier devices in the same sub-frequency band; Wherein, the determined current working frequency band is divided according to a preset division rule to obtain multiple sub-frequency bands, and a corresponding number of sub-carrier channels are assigned to each of the obtained sub-frequency bands, and each of the obtained Several sub-carrier channels allocated in a sub-frequency band are respectively loaded on corresponding carrier devices, and the specific steps to realize mutual communication between carrier devices in the same sub-frequency band include: According to the determined current working frequency band, obtain the subcarrier width corresponding to the current working frequency band, and further obtain the frequency corresponding to each subcarrier channel in the current working frequency band; Assign corresponding channel number parameters to the obtained frequency of each subcarrier channel according to the order of frequency from small to large; Determine the number of sub-frequency bands and the number of sub-carrier channels contained in each sub-frequency band according to preset division rules, and assign the obtained sub-carrier channel number parameters to corresponding sub-frequency bands; Load the sub-carrier channel number parameters and their corresponding frequency ranges in each sub-frequency band to the corresponding carrier equipment, and set corresponding effective identifications for the carrier equipment in each sub-frequency band. When the carrier in the same sub-frequency band When the valid identifiers of the devices are the same, the carrier devices in the same sub-band can communicate with each other. 2. The method of claim 1, further comprising: The valid identifiers set on carrier devices in different frequency bands are different. 3 . The method according to claim 1 , wherein the parameter of the channel number of the subcarrier in each subfrequency band and its corresponding frequency range are loaded on the carrier chip of the corresponding carrier device. 4 . 4. The method according to claim 1, wherein the loading of the sub-carrier channel number parameter and its corresponding frequency range in each sub-band to the corresponding carrier device is when the carrier chip is powered on and initialized, Set through the interface between the CPU and the carrier chip. 5. a device for optimizing G3-PLC carrier communication network performance, is characterized in that, described device comprises: A working frequency band determining unit is used to determine the current working frequency band of each carrier device on the G3-PLC carrier communication network; wherein, the working frequency band includes A frequency band, FCC frequency band and ARIB frequency band; A working frequency band dividing unit, configured to divide the determined current working frequency band according to a preset division rule to obtain a plurality of sub-frequency bands, and assign a corresponding number of sub-carrier channels to each of the obtained sub-frequency bands, and The several sub-carrier channels allocated in each sub-frequency band are respectively loaded on the corresponding carrier devices, so that the carrier devices in the same sub-frequency band can communicate with each other; Wherein, the working frequency band division unit includes: A subcarrier channel acquisition module, configured to acquire the subcarrier width corresponding to the current working frequency band according to the determined current working frequency band, and further obtain the frequency corresponding to each subcarrier channel in the current working frequency band; The channel number parameter allocation module is used to allocate corresponding channel number parameters to the frequency of each subcarrier channel obtained in accordance with the sequence of frequencies from small to large; The sub-band division and allocation module is used to determine the number of sub-bands and the number of sub-carrier channels contained in each sub-band according to preset division rules, and assign the obtained sub-carrier channel number parameters to corresponding sub-band; The optimization and communication module is used to load the sub-carrier channel number parameter and its corresponding frequency range in each sub-frequency band to the corresponding carrier equipment, and provide corresponding effective identifications for the carrier equipment in each sub-frequency band, When the effective identifiers of the carrier devices in the same sub-band are the same, the carrier devices in the same sub-band can communicate with each other. 6 . The device according to claim 5 , wherein the parameter of the channel number of the sub-carrier in each sub-frequency band and its corresponding frequency range are loaded on the carrier chip of the corresponding carrier device. 7 . 7. The device according to claim 5, wherein the loading of the sub-carrier channel number parameter and its corresponding frequency range in each sub-band to the corresponding carrier device is when the carrier chip is powered on and initialized, Set through the interface between the CPU and the carrier chip.