CN115865134A - Marketing and distribution isolation method applied to power line high-speed carrier communication - Google Patents
Marketing and distribution isolation method applied to power line high-speed carrier communication Download PDFInfo
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Abstract
The invention discloses an operation and distribution isolation method applied to power line high-speed carrier communication, which comprises the following steps: filling factory information and 'distribution network identification characters' or 'marketing identification characters' into the extension field of the beacon frame, packaging and periodically transmitting by the main node; receiving a beacon frame from a node, judging whether an extension field of the beacon frame is a 'distribution network identification character', if not, discarding the network, and finding the next network again; if so, sending an association request message to the host node, and filling manufacturer information and 'distribution network identification characters' or 'marketing identification characters' into an extension field of the association request message; the main node judges whether the expanded field of the request message is 'distribution network identification character', if not, the network access is refused; if yes, the network access is approved. The method can reduce the interference on the existing HPLC of the marketing system when the distribution network uses the HPLC, and avoid the problems of frequency band use conflict, network cross, meter reading quality reduction and the like.
Description
Technical Field
The invention relates to the technical field of power line carrier communication, in particular to an operation and distribution isolation method applied to power line high-speed carrier communication.
Background
High Power Line Communication (HPLC) is an important part of smart grid communication technology. Based on the HPLC technology, the functions of high-frequency data acquisition, power failure active reporting, clock accurate management, phase topology identification, station area automatic identification, ID unified identification management, file automatic synchronization, communication performance monitoring, network optimization and the like can be realized.
At present, the distribution field gradually starts to use a technology based on HPLC communication, but as marketing HPLC is already deployed and applied, the distribution network scene uses HPLC communication, and marketing services may be generated, such as frequency band conflict, network crossing, meter reading quality reduction and the like.
The communication frequency band specified by the current low-voltage power line high-speed carrier communication interconnection technical specification is as follows:
| frequency band | Frequency range (MHz) | Carrier start number | Carrier cutoff numbering |
| 0 | 1.953～11.96 | 80 | 490 |
| 1 | 2.441～5.615 | 100 | 230 |
| 2 | 0.781～2.930 | 32 | 120 |
| 3 | 1.758～2.930 | 72 | 120 |
| 4 | Retention | -- | -- |
Generally, in the power distribution and power utilization fields, a default supply frequency band is required to adopt factory configuration of a frequency band 2, that is, a factory module adopts the frequency band 2 by default (0.781 MHz to 2.930 MHz), and as the HPLC has an inter-network negotiation mechanism, network negotiation and bandwidth negotiation under the same frequency can be performed, and the mechanism is shown in fig. 3.
Because the equipment difference in the power distribution and electricity utilization field is obvious, a large number of intelligent switches, agile circuit monitoring equipment, intelligent charging piles, intelligent photovoltaic grid-connected switches and other equipment are adopted in the intelligent distribution area, and the requirements on the perception frequency of the switch state and the control response are more urgent. Under the condition of overlapping with the existing frequency band of electricity, the communication link of the HPLC needs to carry out inter-network negotiation; under the same link, because the existing bandwidth negotiation mechanism, the number of intelligent devices for power distribution is less than that of devices in the power utilization field, and the bandwidth is smaller, so that when a control command with high priority is issued in the power distribution field, the control command cannot be sent to a target device in time due to the existence of the negotiation mechanism, and non-real-time response of services is caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides a marketing and distribution isolation method applied to power line high-speed carrier communication, which can reduce the interference on the existing HPLC of a marketing system when a distribution network uses the HPLC, and avoid the problems of frequency band use conflict, network crosstalk, meter reading quality reduction and the like.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a marketing and distribution isolation method applied to power line high-speed carrier communication comprises a power line high-speed carrier communication network, wherein the network comprises a main node and a plurality of slave nodes, and the marketing and distribution isolation method comprises the following steps:
filling factory information and 'distribution network identification characters' or 'marketing identification characters' into the extension field of the beacon frame, packaging and periodically transmitting by the main node;
the slave node receives the beacon frame, judges whether the extension field of the beacon frame is a distribution network identification character, and if not, discards the network and finds the next network again; if so, sending an association request message to the host node, and filling manufacturer information and 'distribution network identification characters' or 'marketing identification characters' into an extension field of the association request message;
the master node checks the extended field of the association request message, judges whether the extended field of the request message is 'distribution network identification character', and refuses to access the network if the extended field of the request message is 'distribution network identification character'; if so, sending a correlation confirmation message and distributing a unique equipment identifier for the slave node;
and the slave node accesses the network and carries out corresponding setting according to the unique equipment identifier distributed by the master node.
Preferably, the method further comprises the following steps,
setting a carrier frequency band 4, wherein the frequency band range of the frequency band 4 is in the frequency band range of the frequency band 1 but does not intersect with the frequency band range of the frequency band 2, and the carrier start-stop numbering range of the frequency band 4 is in the numbering range of the frequency band 1 but does not intersect with the numbering range of the frequency band 2;
the master node and the slave nodes start a default use frequency band 4.
Preferably, the frequency range of the frequency band 4 is 3.003MHz to 5.615MHz, and the number of the start and stop of the carrier of the frequency band 4 is 123 to 230.
Preferably, the extension field of the beacon frame is any continuous 3 bytes in 13 th to 19 th bytes of the beacon frame.
Preferably, the extension field of the beacon frame is 17 th to 19 th bytes, factory information is filled in the 17 th and 18 th bytes, and a 'distribution network identification character' or a 'marketing identification character' is filled in the 19 th byte.
Preferably, the extension field of the association request message is any continuous 3 bytes from the 24 th byte to the 41 th byte.
Preferably, the extension field of the association request message is 24 th to 26 th bytes, factory information is filled in the 24 th and 25 th bytes, and a 'distribution network identification character' or a 'marketing identification character' is filled in the 26 th byte.
Preferably, before sending the association confirmation message, the method further comprises the following steps,
the master node judges whether the white list check condition of the master node is met or not based on the association request message reported by the slave node, if so, the master node sends an association confirmation message and distributes a unique equipment identifier for the slave node; if not, the output does not pass.
Based on the technical scheme, the invention has the beneficial effects that: the frequency band 4 is used, the frequency band 2 commonly used for marketing is avoided, and the influence on the use of the marketing frequency band is reduced; filling and identifying through the extension field of the beacon frame and the extension field of the association request message ensures that when certain conflicts are generated aiming at partial marketing small-probability use frequency bands 0, 1 and 3 and the frequency band 4 of the invention, the marketing service is prevented from being influenced by the cross network.
Drawings
FIG. 1 is a flow diagram of an embodiment of a method for operation and distribution isolation for power line high speed carrier communications;
FIG. 2 is a schematic diagram of a networking flow in one embodiment;
FIG. 3 is a basic HPLC networking schematic;
fig. 4 is a schematic diagram of an HPLC internetworking negotiation mechanism.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
A basic HPLC networking schematic diagram, referring to fig. 3, the HPLC networking is composed of a master node CCO and a plurality of slave nodes ad hoc networks, wherein some of the slave nodes play a role of forwarding relay as proxy nodes PCO; at present, HPLC (high performance liquid chromatography) supports 15-level deep networking, and each node has a unique equipment identifier TEI; the unique device identity TEI of the host node CCO is set to 1.
As shown in fig. 1 and 2, the present embodiment provides a marketing and distribution isolation method applied to power line high-speed carrier communication, which is specifically described as follows:
the expanded frequency band reduces the frequency band communication influence: the frequency band 4 is defined by extension on the basis of the frequency band 0-3 defined by the standard HPLC, the subcarrier intervals are the same as the four frequency bands of the standard HPLC, the baseband signal processing unit is completely the same, only subcarriers with different numbers are used during modulation, the frequency band 4 ranges from 3.003MHz to 5.615MHz, and the starting and ending numbers of the carriers are 123-230.
As can be seen from the communication frequency band table in the table 1, the frequency band 4 completely avoids the frequency band 2 commonly used in marketing, and the frequency band influence is greatly reduced.
TABLE 1 communication frequency band Table
| Frequency band | Frequency range (MHz) | Carrier start number | Carrier cutoff numbering |
| 0 | 1.953～11.96 | 80 | 490 |
| 1 | 2.441～5.615 | 100 | 230 |
| 2 | 0.781～2.930 | 32 | 120 |
| 3 | 1.758～2.930 | 72 | 120 |
| 4 | 3.003～5.615 | 123 | 230 |
And (3) link layer protocol extension, solving the problem of network connection: the master node CCO sends a beacon frame in the networking stage, and the slave node STA initiates an association request message for joining the network after receiving the central beacon frame. Filling and identifying the extended field of the beacon frame and the extended field of the association request message ensure that the marketing service is prevented from being influenced by the cross network when certain conflicts are generated aiming at the frequency bands 0, 1 and 3 used by part of marketing with small probability and the frequency band 4 of the invention.
Using 17 to 19 bytes as a special field in a reserved field extension field of a beacon frame of a CCO, filling factory information in 17 th and 18 th bytes as shown in Table 2, using 'P' to represent a distribution network or 'Y' to represent marketing in 19 th byte, encapsulating and periodically transmitting by the main node;
receiving a beacon frame from a node in a power distribution scene, checking whether an extension field of the beacon frame is a distribution network, namely judging whether the extension field of the beacon frame is 'P', if not, discarding the network, and searching a next network again; if yes, sending an association request message to the host node, using 24 th to 26 th bytes in manufacturer self-defined information of 24 th to 41 th bytes of an extension field of the association request message, wherein manufacturer information is filled in the 24 th and 25 th bytes, and the 26 th byte uses 'P' to represent a distribution network or 'Y' to represent marketing, as shown in Table 3;
the main node checks the extended field of the association request message, judges whether the extended field of the request message is 'P', and refuses to access the network if the extended field of the request message is 'P'; and if the white list passes the verification, the white list is verified, the association confirmation message is sent and the unique equipment identifier is distributed to the slave node, and if the white list fails the verification, the output fails.
And the slave node accesses the network and carries out corresponding setting according to the unique equipment identifier distributed by the master node.
The white list is a list which is issued to the CCO module by the concentrator and allows network access, the CCO compares the association request message reported by the slave node with the white list, and if the address of the slave node which accesses the network is not in the range, the network access is not allowed.
Table 2 standard beacon frame payload field table
Table 3 associated request message format table
The above description is only a preferred embodiment of the operation and distribution isolation method applied to the high-speed carrier communication of the power line disclosed in the present invention, and is not intended to limit the scope of the embodiments of the present disclosure. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the embodiments of the present disclosure should be included in the protection scope of the embodiments of the present disclosure.
Claims (8)
1. An operation and distribution isolation method applied to power line high-speed carrier communication is characterized by comprising a power line high-speed carrier communication network, wherein the network comprises a main node and a plurality of slave nodes, and the method comprises the following steps:
filling factory information and 'distribution network identification characters' or 'marketing identification characters' into the extension field of the beacon frame, packaging and periodically transmitting by the main node;
the slave node receives the beacon frame, judges whether the extension field of the beacon frame is a distribution network identification character, and if not, discards the network and finds the next network again; if so, sending an association request message to the host node, and filling manufacturer information and 'distribution network identification characters' or 'marketing identification characters' into an extension field of the association request message;
the main node checks the extension field of the association request message, judges whether the extension field of the request message is 'distribution network identification character', and refuses to access the network if the extension field of the request message is 'distribution network identification character'; if yes, sending a correlation confirmation message and distributing a unique equipment identifier for the slave node;
and the slave node accesses the network and carries out corresponding setting according to the unique equipment identifier distributed by the master node.
2. The operation and distribution isolation method applied to the power line high speed carrier communication according to claim 1, further comprising the steps of,
setting a carrier frequency band 4, wherein the frequency band range of the frequency band 4 is in the frequency band range of the frequency band 1 but does not intersect with the frequency band range of the frequency band 2, and the carrier start-stop numbering range of the frequency band 4 is in the numbering range of the frequency band 1 but does not intersect with the numbering range of the frequency band 2;
the master node and the slave nodes start a default use frequency band 4.
3. The operation and distribution isolation method applied to the high-speed carrier communication of the power line according to claim 2, wherein the frequency band of the frequency band 4 is in a range from 3.003MHz to 5.615MHz, and the number of the start and stop of the carrier of the frequency band 4 is from 123 to 230.
4. The marketing isolation method applied to the power line high-speed carrier communication according to claim 1 or 2, wherein the extension field of the beacon frame is any continuous 3 bytes in 13 th to 19 th bytes of the beacon frame.
5. The operation and distribution isolation method applied to the power line high-speed carrier communication system as claimed in claim 4, wherein the extension field of the beacon frame is 17 th to 19 th bytes, factory information is filled in the 17 th and 18 th bytes, and a 'distribution network identification character' or a 'marketing identification character' is filled in the 19 th byte.
6. The marketing isolation method applied to the high-speed carrier communication of the power line according to claim 1 or 2, wherein the extension field of the association request message is any continuous 3 bytes from the 24 th byte to the 41 th byte.
7. The marketing and distribution isolation method applied to high-speed carrier communication of power lines as claimed in claim 6, wherein the extension field of the association request message is 24 th to 26 th bytes, factory information is filled in the 24 th and 25 th bytes, and a 'distribution network identification character' or a 'marketing identification character' is filled in the 26 th byte.
8. The operation and distribution isolation method applied to high-speed carrier communication of power line according to claim 1, further comprising the following steps before sending the association confirmation message,
the master node judges whether the white list check condition of the master node is met or not based on the association request message reported by the slave node, if so, the master node sends an association confirmation message and distributes a unique equipment identifier for the slave node; if not, the output does not pass.
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| WO2024234460A1 (en) * | 2023-05-18 | 2024-11-21 | 阳光电源（上海）有限公司 | Communication method, apparatus and system |
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