CN115622591B - Noise-based power line carrier hierarchical networking method and device - Google Patents

Noise-based power line carrier hierarchical networking method and device Download PDF

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Publication number
CN115622591B
CN115622591B CN202211630732.XA CN202211630732A CN115622591B CN 115622591 B CN115622591 B CN 115622591B CN 202211630732 A CN202211630732 A CN 202211630732A CN 115622591 B CN115622591 B CN 115622591B
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noise
node
time slot
group
subcarrier
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CN115622591A (en
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彭志荣
陈钢
冯志华
曹威
夏华进
张欣
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Jiangmen Power Supply Bureau of Guangdong Power Grid Co Ltd
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Jiangmen Power Supply Bureau of Guangdong Power Grid Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/544—Setting up communications; Call and signalling arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/542—Systems for transmission via power distribution lines the information being in digital form

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Abstract

The invention discloses a noise-based power line carrier hierarchical networking method and a noise-based power line carrier hierarchical networking device, wherein the method comprises the following steps: when intEach time slot receives the response networking request return of each superior site nodeAcquiring load information and node backlog quantity corresponding to each superior station node when the returned operation noise and signal interference information of a plurality of subcarriers; calculating the signal-to-interference-and-noise ratio variation value of each subcarrier based on the operation noise and signal interference information; selecting subcarriers with signal-to-interference-and-noise ratio variation values larger than a signal-to-interference-and-noise threshold value as available subcarriers, and counting the number of the available subcarriers corresponding to each superior site node; and then calculating the networking similarity of each site node, selecting the site node with the maximum networking similarity as a target site node, and connecting the site node with the target site node through the available subcarriers.

Description

Noise-based power line carrier hierarchical networking method and device
Technical Field
The invention relates to the technical field of power line carrier networking, in particular to a noise-based power line carrier hierarchical networking method and device.
Background
With the large-scale access of distributed new energy to the distribution network, the number of the power equipment of the novel power system is greatly increased. A large amount of noise and signal interference can be generated by power electronic elements in the power equipment in the operation process, so that the signal-to-noise ratio of a power line carrier in the transmission process is sharply reduced, and the number of available subcarriers is reduced; meanwhile, because the number of available subcarriers is different among different networks, the communication performance among the hierarchical networks in the networking process has certain difference.
In the prior art, a communication conflict of a terminal node is generally adopted to judge a slave node and classify the slave node, and communication networking connection is established for the slave node in sequence based on classification; or determining the optimal neighborhood of the nodes by using the reward value, and further searching the optimal neighborhood nodes to carry out power line carrier networking.
However, the existing method ignores the dynamic changes of noise and signal interference, cannot accurately judge the number of the current available subcarriers, and also ignores the difference between the backlog of node data and the number of the available subcarriers between the upper-level network and the lower-level network, so that the number of the subcarriers and the node requirement have insufficient adaptability, and the transmission congestion phenomenon occurs in the upper-level network and the lower-level network.
Disclosure of Invention
The invention provides a noise-based power line carrier hierarchical networking method and a noise-based power line carrier hierarchical networking device, which solve the technical problems that the number of subcarriers and the node requirement adaptability are insufficient and the transmission congestion phenomenon occurs in an upper-level network and a lower-level network due to the fact that the current available subcarrier number cannot be accurately judged because the dynamic changes of noise and signal interference are ignored and the difference between the backlog of node data and the available subcarrier number between the upper-level network and the lower-level network is also ignored in the prior art.
The invention provides a noise-based hierarchical networking method for power line carriers, which is applied to communication nodes in a power line carrier networking architecture, wherein the power line carrier networking architecture further comprises a plurality of superior site nodes, and the method comprises the following steps:
when in
Figure 749819DEST_PATH_IMAGE001
When receiving the running noise and signal interference information of a plurality of subcarriers returned by each superior site node in response to a networking request, each time slot acquires load information and node backlog quantity corresponding to each superior site node; wherein,
Figure 743183DEST_PATH_IMAGE001
is a positive integer;
calculating the signal-to-interference-and-noise ratio variation value of each subcarrier associated with each superior site node based on the operation noise and the signal interference information;
selecting the sub-carriers with the signal to interference plus noise ratio variation value larger than a signal to interference plus noise threshold value as available sub-carriers, and counting the number of the available sub-carriers corresponding to each superior site node;
calculating networking similarity of each superior site node according to the operation noise, the signal interference information, the load information, the node backlog number and the number of available subcarriers;
and selecting the superior site node to which the maximum networking similarity belongs as a target site node, and connecting the superior site node to the target site node through the available subcarriers.
Optionally, the step of calculating, based on the operating noise and the signal interference information, a signal to interference plus noise ratio variation value of each subcarrier associated with each superordinate station node includes:
performing noise power retrieval on a noise library through the operation noise, and determining the noise power of each subcarrier;
based on a normal distribution model of signal interference power, performing data selection on the normal distribution model according to the signal interference information, and determining the signal interference power of each subcarrier;
respectively calculating the noise change rate and the signal interference change rate of each subcarrier according to the noise power and the signal interference power;
and calculating the signal-to-interference-and-noise ratio change value of each subcarrier associated with each superior site node by adopting the noise power, the signal interference power, the noise change rate and the signal interference change rate.
Optionally, the sir variation value is calculated by the following formula:
Figure 635528DEST_PATH_IMAGE002
in the formula:
Figure 575803DEST_PATH_IMAGE003
it is meant to represent a communication node,
Figure 99188DEST_PATH_IMAGE004
is shown as
Figure 997874DEST_PATH_IMAGE004
The nodes of the upper-level site of the group,
Figure 380445DEST_PATH_IMAGE005
is shown as
Figure 921147DEST_PATH_IMAGE005
The number of sub-carriers is such that,
Figure 33460DEST_PATH_IMAGE001
is shown as
Figure 775151DEST_PATH_IMAGE001
A time slot;
Figure 238493DEST_PATH_IMAGE006
is shown in
Figure 520570DEST_PATH_IMAGE001
The communication node passes through the first on one time slot
Figure 752968DEST_PATH_IMAGE005
Subcarrier access of
Figure 259036DEST_PATH_IMAGE004
The signal-to-interference-and-noise ratio variation value of the nodes of the upper-level station of the group;
Figure 347690DEST_PATH_IMAGE007
is shown in
Figure 230196DEST_PATH_IMAGE001
The communication node passes through the first on one time slot
Figure 520363DEST_PATH_IMAGE005
Subcarrier access of
Figure 462911DEST_PATH_IMAGE004
Grouping receiving end signals of superior site nodes;
Figure 635266DEST_PATH_IMAGE008
is shown in
Figure 462408DEST_PATH_IMAGE001
The communication node passes through the first on one time slot
Figure 669398DEST_PATH_IMAGE005
Sub-carrier access of
Figure 517269DEST_PATH_IMAGE004
The noise change rate of the group superordinate site node;
Figure 442499DEST_PATH_IMAGE009
is shown in
Figure 807753DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 72512DEST_PATH_IMAGE005
Subcarrier access of
Figure 91283DEST_PATH_IMAGE004
Noise power of the group superordinate station node;
Figure 238231DEST_PATH_IMAGE010
is shown in
Figure 266230DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 585828DEST_PATH_IMAGE005
Subcarrier access of
Figure 978763DEST_PATH_IMAGE004
The signal interference change rate of the group superior site node;
Figure 613007DEST_PATH_IMAGE011
is shown in
Figure 913538DEST_PATH_IMAGE001
The communication node passes through the first on one time slot
Figure 215207DEST_PATH_IMAGE005
Subcarrier access of
Figure 982306DEST_PATH_IMAGE004
Signal interference power of the group superordinate site node.
Optionally, the calculation formula of the noise change rate is:
Figure 838266DEST_PATH_IMAGE012
in the formula:
Figure 208068DEST_PATH_IMAGE008
is shown in
Figure 505188DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 302243DEST_PATH_IMAGE005
Sub-carrier access of
Figure 848762DEST_PATH_IMAGE004
The noise change rate of the group superordinate site node;
Figure 491096DEST_PATH_IMAGE001
is shown as
Figure 501777DEST_PATH_IMAGE001
A time slot;
Figure 607749DEST_PATH_IMAGE009
is shown in
Figure 641564DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 353168DEST_PATH_IMAGE005
Subcarrier access of
Figure 952776DEST_PATH_IMAGE004
Noise power of the group superordinate station node;
Figure 91634DEST_PATH_IMAGE013
is shown in
Figure 816007DEST_PATH_IMAGE014
Communication node passes through on one time slot
Figure 65723DEST_PATH_IMAGE005
Subcarrier access of
Figure 785417DEST_PATH_IMAGE004
Noise power of nodes of a group superior site;
the calculation formula of the signal interference change rate is as follows:
Figure 236121DEST_PATH_IMAGE015
in the formula:
Figure 306845DEST_PATH_IMAGE010
is shown in
Figure 297935DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 872136DEST_PATH_IMAGE005
Subcarrier access of
Figure 490812DEST_PATH_IMAGE004
The signal interference change rate of the group superior site node;
Figure 48832DEST_PATH_IMAGE001
denotes the first
Figure 578033DEST_PATH_IMAGE001
A time slot;
Figure 272320DEST_PATH_IMAGE011
is shown in
Figure 923881DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 844564DEST_PATH_IMAGE005
Subcarrier access of
Figure 239773DEST_PATH_IMAGE004
Signal interference power of a group of superior site nodes;
Figure 788566DEST_PATH_IMAGE016
is shown in
Figure 751974DEST_PATH_IMAGE014
Communication node passes through on one time slot
Figure 19007DEST_PATH_IMAGE005
Subcarrier access of
Figure 155591DEST_PATH_IMAGE004
Signal interference power of the group superordinate site node.
Optionally, the calculation formula of the networking similarity is as follows:
Figure 824469DEST_PATH_IMAGE017
in the formula:
Figure 552254DEST_PATH_IMAGE018
is shown in
Figure 468036DEST_PATH_IMAGE001
Access of communication node on time slot
Figure 205048DEST_PATH_IMAGE004
Networking similarity of nodes of the group superior station;
Figure 666117DEST_PATH_IMAGE019
is shown in
Figure 830382DEST_PATH_IMAGE001
Access of communication node on time slot
Figure 72007DEST_PATH_IMAGE004
The number of available subcarriers of the group of superior site nodes;
Figure 488076DEST_PATH_IMAGE020
is shown in
Figure 131547DEST_PATH_IMAGE001
On one time slot
Figure 201134DEST_PATH_IMAGE004
The backlog number of nodes of the upper-level station of the group;
Figure 71001DEST_PATH_IMAGE021
representing the subcarrier number difference weight,
Figure 149816DEST_PATH_IMAGE022
is shown in
Figure 585476DEST_PATH_IMAGE001
On a time slot
Figure 357123DEST_PATH_IMAGE004
The number of subcarriers of the nodes of the group superior site;
Figure 42183DEST_PATH_IMAGE023
is shown in
Figure 924688DEST_PATH_IMAGE001
Communication node passing through available sub-carriers on a time slotWave access to
Figure 415188DEST_PATH_IMAGE004
Noise and signal interference degree of the nodes of the group superior station;
Figure 295419DEST_PATH_IMAGE024
representing the access load weight of the superordinate station node,
Figure 733353DEST_PATH_IMAGE025
is shown in
Figure 888391DEST_PATH_IMAGE001
On a time slot
Figure 501906DEST_PATH_IMAGE004
The access load of the group superior site node;
wherein,
Figure 615356DEST_PATH_IMAGE026
in the formula:
Figure 275007DEST_PATH_IMAGE023
is shown in
Figure 640261DEST_PATH_IMAGE001
The communication node accesses the first time slot through the available sub-carrier
Figure 701758DEST_PATH_IMAGE004
Noise and signal interference degree of the nodes of the group superior station;
Figure 923792DEST_PATH_IMAGE027
the weights representing the noise and the signal interference,
Figure 336318DEST_PATH_IMAGE028
is shown in
Figure 98738DEST_PATH_IMAGE001
Communication node access over a time slot
Figure 418336DEST_PATH_IMAGE004
The set of available subcarriers for the group of superordinate site nodes,
Figure 608009DEST_PATH_IMAGE008
、
Figure 445515DEST_PATH_IMAGE009
、
Figure 746047DEST_PATH_IMAGE010
and
Figure 47715DEST_PATH_IMAGE011
are respectively shown in
Figure 549235DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 936354DEST_PATH_IMAGE005
Subcarrier access of
Figure 40576DEST_PATH_IMAGE004
Noise change rate, noise power, signal to interference change rate, and signal to interference power of the group superordinate site node.
The invention also provides a noise-based power line carrier hierarchical networking device, which is applied to communication nodes in a power line carrier networking architecture, wherein the power line carrier networking architecture further comprises a plurality of superior site nodes, and the device comprises:
information return module for use in the second place
Figure 931171DEST_PATH_IMAGE001
When receiving the running noise and signal interference information of a plurality of subcarriers returned by each superior site node in response to a networking request, each time slot acquires load information and node backlog quantity corresponding to each superior site node; wherein，
Figure 869172DEST_PATH_IMAGE001
Is a positive integer;
a signal-to-interference ratio calculation module, configured to calculate, based on the operating noise and the signal interference information, a signal-to-interference-and-noise ratio variation value of each subcarrier associated with each superordinate site node;
a subcarrier selecting module, configured to select a subcarrier with the sir variation value greater than a snr threshold as an available subcarrier, and count the number of available subcarriers of the available subcarriers corresponding to each superordinate station node;
the networking similarity calculation module is used for calculating the networking similarity of each superior site node according to the running noise, the signal interference, the load information, the node backlog quantity and the available subcarrier quantity;
and the networking connection module is used for selecting the superior site node to which the maximum networking similarity belongs as a target site node and connecting the superior site node to the target site node through the available subcarriers.
Optionally, the signal-to-dryness ratio calculation module comprises:
the noise power determination submodule is used for performing noise power retrieval on a noise library through the operation noise and determining the noise power of each subcarrier;
the signal interference power determining submodule is used for performing data selection on a normal distribution model based on the signal interference power according to the signal interference information and determining the signal interference power of each subcarrier;
the change rate calculation submodule is used for respectively calculating the noise change rate and the signal interference change rate of each subcarrier according to the noise power and the signal interference power;
and the signal-to-interference-and-noise ratio calculation submodule is used for calculating the signal-to-interference-and-noise ratio change value of each subcarrier associated with each superior site node by adopting the noise power, the signal interference power, the noise change rate and the signal interference change rate.
Optionally, the sir variation value is calculated by the following formula:
Figure 478007DEST_PATH_IMAGE002
in the formula:
Figure 589183DEST_PATH_IMAGE003
which represents a communication node that is,
Figure 334285DEST_PATH_IMAGE004
is shown as
Figure 302241DEST_PATH_IMAGE004
The nodes of the upper-level site of the group,
Figure 536389DEST_PATH_IMAGE005
is shown as
Figure 247993DEST_PATH_IMAGE005
The number of sub-carriers is such that,
Figure 50864DEST_PATH_IMAGE001
is shown as
Figure 189721DEST_PATH_IMAGE001
A time slot;
Figure 507570DEST_PATH_IMAGE006
is shown in
Figure 898231DEST_PATH_IMAGE001
The communication node passes through the first on one time slot
Figure 883505DEST_PATH_IMAGE005
Subcarrier access of
Figure 927684DEST_PATH_IMAGE004
The signal-to-interference-and-noise ratio variation value of the nodes of the upper-level station of the group;
Figure 139354DEST_PATH_IMAGE007
is shown in
Figure 192760DEST_PATH_IMAGE001
The communication node passes through the first on one time slot
Figure 970223DEST_PATH_IMAGE005
Sub-carrier access of
Figure 450883DEST_PATH_IMAGE004
A receiving end signal of a group superior site node;
Figure 477745DEST_PATH_IMAGE008
is shown in
Figure 472858DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 104828DEST_PATH_IMAGE005
Subcarrier access of
Figure 756389DEST_PATH_IMAGE004
The noise change rate of the group superordinate site node;
Figure 536126DEST_PATH_IMAGE009
is shown in
Figure 931336DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 621074DEST_PATH_IMAGE005
Subcarrier access of
Figure 443537DEST_PATH_IMAGE004
Noise power of nodes of a group superior site;
Figure 851515DEST_PATH_IMAGE010
is shown in
Figure 50416DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 391398DEST_PATH_IMAGE005
Subcarrier access of
Figure 650341DEST_PATH_IMAGE004
The signal interference change rate of the group superior site node;
Figure 139091DEST_PATH_IMAGE011
is shown in
Figure 876103DEST_PATH_IMAGE001
The communication node passes through the first on one time slot
Figure 537504DEST_PATH_IMAGE005
Subcarrier access of
Figure 905032DEST_PATH_IMAGE004
Signal interference power of the group superordinate site node.
Optionally, the calculation formula of the noise change rate is:
Figure 881078DEST_PATH_IMAGE012
in the formula:
Figure 156201DEST_PATH_IMAGE008
is shown in
Figure 799672DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 275784DEST_PATH_IMAGE005
Subcarrier access of
Figure 739127DEST_PATH_IMAGE004
Group superordinate stationThe rate of change of noise at the point node;
Figure 817941DEST_PATH_IMAGE001
denotes the first
Figure 456864DEST_PATH_IMAGE001
A time slot;
Figure 900615DEST_PATH_IMAGE009
is shown in
Figure 116832DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 733758DEST_PATH_IMAGE005
Subcarrier access of
Figure 86242DEST_PATH_IMAGE004
Noise power of the group superordinate station node;
Figure 166806DEST_PATH_IMAGE013
is shown in
Figure 542424DEST_PATH_IMAGE014
Communication node passes through on one time slot
Figure 963041DEST_PATH_IMAGE005
Subcarrier access of
Figure 170031DEST_PATH_IMAGE004
Noise power of nodes of a group superior site;
the calculation formula of the signal interference change rate is as follows:
Figure 17902DEST_PATH_IMAGE015
in the formula:
Figure 84078DEST_PATH_IMAGE010
is shown inFirst, the
Figure 42807DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 369883DEST_PATH_IMAGE005
Sub-carrier access of
Figure 795179DEST_PATH_IMAGE004
The signal interference change rate of the group superior site node;
Figure 207706DEST_PATH_IMAGE001
is shown as
Figure 907809DEST_PATH_IMAGE001
A time slot;
Figure 823812DEST_PATH_IMAGE011
is shown in
Figure 279064DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 316903DEST_PATH_IMAGE005
Subcarrier access of
Figure 883013DEST_PATH_IMAGE004
Signal interference power of a group of superior site nodes;
Figure 856785DEST_PATH_IMAGE016
is shown in
Figure 482939DEST_PATH_IMAGE014
Communication node passes through on one time slot
Figure 604479DEST_PATH_IMAGE005
Subcarrier access of
Figure 849646DEST_PATH_IMAGE004
Group superior site nodeThe signal interference power of the point.
Optionally, the calculation formula of the networking similarity is as follows:
Figure 5821DEST_PATH_IMAGE017
in the formula:
Figure 537297DEST_PATH_IMAGE018
is shown in
Figure 146133DEST_PATH_IMAGE001
Access of communication node on time slot
Figure 460570DEST_PATH_IMAGE004
Networking similarity of nodes of the group superior station;
Figure 471252DEST_PATH_IMAGE019
is shown in
Figure 376891DEST_PATH_IMAGE001
Access of communication node on time slot
Figure 207444DEST_PATH_IMAGE004
The number of available subcarriers of the group of superior site nodes;
Figure 653468DEST_PATH_IMAGE020
is shown in
Figure 758189DEST_PATH_IMAGE001
On a time slot
Figure 834729DEST_PATH_IMAGE004
The backlog number of nodes of the upper-level station of the group;
Figure 418157DEST_PATH_IMAGE021
representing the subcarrier number difference weight,
Figure 402294DEST_PATH_IMAGE022
is shown in
Figure 387567DEST_PATH_IMAGE001
On a time slot
Figure 838271DEST_PATH_IMAGE004
The number of subcarriers of the group of superior site nodes;
Figure 908995DEST_PATH_IMAGE023
is shown in
Figure 696823DEST_PATH_IMAGE001
The communication node accesses the first time slot through the available sub-carrier
Figure 677548DEST_PATH_IMAGE004
Noise and signal interference degree of the nodes of the group superior station;
Figure 158208DEST_PATH_IMAGE024
representing the access load weight of the superordinate station node,
Figure 388332DEST_PATH_IMAGE025
is shown in
Figure 979851DEST_PATH_IMAGE001
On one time slot
Figure 674137DEST_PATH_IMAGE004
The access load of the group superior site node;
wherein,
Figure 463714DEST_PATH_IMAGE026
in the formula:
Figure 509031DEST_PATH_IMAGE023
is shown in
Figure 841923DEST_PATH_IMAGE001
The communication node accesses the first time slot through the available sub-carrier
Figure 125137DEST_PATH_IMAGE004
Noise and signal interference degree of the nodes of the group superior station;
Figure 213179DEST_PATH_IMAGE027
the weights representing the noise and the signal interference,
Figure 621157DEST_PATH_IMAGE028
is shown in
Figure 288899DEST_PATH_IMAGE001
Access of communication node on time slot
Figure 957778DEST_PATH_IMAGE004
The set of available subcarriers for the group of superordinate site nodes,
Figure 357666DEST_PATH_IMAGE008
、
Figure 846416DEST_PATH_IMAGE009
、
Figure 786690DEST_PATH_IMAGE010
and
Figure 310076DEST_PATH_IMAGE011
are respectively shown at
Figure 208762DEST_PATH_IMAGE001
The communication node passes through the first on one time slot
Figure 588403DEST_PATH_IMAGE005
Subcarrier access of
Figure 129106DEST_PATH_IMAGE004
Noise change rate, noise power, signal interference of group superior site nodesRate of change and signal interference power.
According to the technical scheme, the invention has the following advantages:
when in
Figure 444680DEST_PATH_IMAGE001
When receiving the running noise and signal interference information of a plurality of subcarriers returned by each superior site node in response to the networking request, acquiring load information and node backlog quantity corresponding to each superior site node; wherein,
Figure 45426DEST_PATH_IMAGE001
is a positive integer; calculating the signal-to-interference-and-noise ratio variation value of each subcarrier associated with each superior site node based on the operation noise and signal interference information; selecting the sub-carriers with the signal to interference plus noise ratio variation value larger than the signal to interference plus noise threshold as available sub-carriers, and counting the number of the available sub-carriers corresponding to each superior site node; calculating the networking similarity of each superior site node according to the operation noise, the signal interference information, the load information, the node backlog number and the available subcarrier number; the method comprises the steps of selecting an upper-level station node to which the maximum networking similarity belongs as a target station node, and connecting the upper-level station node to the target station node through an available subcarrier, so that the technical problems that in the prior art, the number of the current available subcarriers cannot be accurately judged due to neglect of dynamic changes of noise and signal interference, meanwhile, the number of subcarriers is insufficient in adaptability to node requirements due to neglect of backlog of node data and the difference of the number of the available subcarriers between an upper-level network and a lower-level network, and the transmission congestion phenomenon occurs in the upper-level network and the lower-level network are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a flowchart illustrating steps of a method for hierarchical networking of power line carriers based on noise according to an embodiment of the present invention;
fig. 2 is a diagram of a power line carrier networking architecture according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating steps of a method for hierarchical networking of power line carriers based on noise according to an alternative embodiment of the present invention;
fig. 4 is a block diagram of a structure of a noise-based power line carrier hierarchical networking device according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a noise-based power line carrier hierarchical networking method and a noise-based power line carrier hierarchical networking device, which are used for solving the technical problems that the number of subcarriers and the node requirement adaptability are insufficient and the transmission congestion phenomenon occurs in an upper-level network and a lower-level network because the dynamic change of noise and signal interference is ignored, the current available subcarrier quantity cannot be accurately judged, and the difference between the backlog of node data and the available subcarrier quantity between the upper-level network and the lower-level network is also ignored in the prior art.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for hierarchical networking of power line carriers based on noise according to an embodiment of the present invention.
The invention provides a noise-based power line carrier hierarchical networking method, which is applied to communication nodes in a power line carrier networking architecture, wherein the power line carrier networking architecture also comprises a plurality of superior site nodes, and the method comprises the following steps:
step 101, when in
Figure 243189DEST_PATH_IMAGE001
And when receiving the running noise and signal interference information of a plurality of subcarriers returned by each superior site node in response to the networking request, acquiring the load information and the node backlog number corresponding to each superior site node.
It should be noted that, in the following description,
Figure 728528DEST_PATH_IMAGE001
the value of (a) is a positive integer; the signal interference information includes: the number of electronic devices distributed on each superior site node and signal interference information of each electronic device on subcarriers in a communication environment;
in a specific embodiment, assume that
Figure 226506DEST_PATH_IMAGE029
One of the time slots is used for receiving the time slot,
Figure 466994DEST_PATH_IMAGE030
setting the communication node as
Figure 683212DEST_PATH_IMAGE003
(ii) a Referring to the power line carrier networking architecture diagram provided in fig. 2, fig. 2 provides a power line carrier networking architecture including: communication node, upper node and
Figure 706663DEST_PATH_IMAGE004
grouping superior site nodes; at the beginning of each time slot, the communication node sends networking request information to the superior nodes, wherein the networking request information exists between the communication node and each superior node
Figure 996830DEST_PATH_IMAGE031
The number of sub-carriers is such that,
Figure 673799DEST_PATH_IMAGE032
(ii) a Each upper node has
Figure 846154DEST_PATH_IMAGE004
Group superordinate site node, first
Figure 670366DEST_PATH_IMAGE004
Group superordinate site node presence
Figure 877356DEST_PATH_IMAGE033
And each superior site node responds to the operation noise and signal interference information of the multiple subcarriers returned by the networking request.
And 102, calculating the signal-to-interference-and-noise ratio variation value of each subcarrier associated with each superior site node based on the operation noise and signal interference information.
And 103, selecting the sub-carriers with the signal to interference plus noise ratio variation value larger than the signal to interference plus noise threshold as available sub-carriers, and counting the number of the available sub-carriers corresponding to each superior site node.
And 104, calculating the networking similarity of each superior site node according to the operation noise, the signal interference information, the load information, the node backlog number and the available subcarrier number.
It should be noted that after the operation noise, the signal interference information, the load information, the node backlog number, and the available subcarrier number are obtained, the networking similarity of each superior site node is calculated according to the operation noise, the signal interference information, the load information, the node backlog number, and the available subcarrier number.
And 105, selecting a superior site node to which the maximum networking similarity belongs as a target site node, and connecting the superior site node to the target site node through an available subcarrier.
It should be noted that, in order to ensure the stability of power line carrier network communication, a superior site node to which the maximum networking similarity belongs is selected as a target site node; in order to improve the efficiency of communication transmission, the target site node is connected through the available subcarriers.
In the examples of this application, when in
Figure 928489DEST_PATH_IMAGE001
Each time slot receives node responses of all superior stationsWhen the operation noise and signal interference information of a plurality of subcarriers returned by the networking request is received, acquiring load information and node backlog quantity corresponding to each superior site node; calculating the signal-to-interference-and-noise ratio variation value of each subcarrier associated with each superior site node based on the operation noise and signal interference information; selecting the sub-carriers with the signal to interference plus noise ratio variation value larger than the signal to interference plus noise threshold as available sub-carriers, and counting the number of the available sub-carriers corresponding to each superior site node; calculating the networking similarity of each superior site node according to the operation noise, the signal interference information, the load information, the node backlog number and the available subcarrier number; the upper-level station node to which the maximum networking similarity belongs is selected as a target station node, and is connected to the target station node through the available subcarriers, so that the dynamic changes of noise and signal interference are considered, the current available subcarrier quantity is accurately judged, meanwhile, the difference between the backlog of node data and the available subcarrier quantity between the upper-level network and the lower-level network is also considered, the subcarrier quantity and the node requirement adaptability are improved, and the transmission congestion phenomenon of the upper-level network and the lower-level network is avoided.
Referring to fig. 3, fig. 3 is a flowchart illustrating a method for hierarchical noise-based power line carrier networking according to an alternative embodiment of the present invention.
The invention provides a noise-based hierarchical networking method for power line carriers, which is applied to communication nodes in a power line carrier networking architecture, wherein the power line carrier networking architecture also comprises a plurality of superior site nodes, and the method comprises the following steps:
step 301, when in the first step
Figure 853720DEST_PATH_IMAGE001
And when receiving the running noise and signal interference information of a plurality of subcarriers returned by each superior site node in response to the networking request, acquiring the load information and the node backlog number corresponding to each superior site node.
In the embodiment of the present application, the specific implementation process of step 301 is similar to that of step 101, and is not described herein again.
And step 302, performing noise power retrieval on the noise base by operating noise, and determining the noise power of each subcarrier.
Note that the noise library includes: the operation noise and the noise power corresponding to the operation noise can be used for searching the noise power of the noise base by using the operation noise through a searching function, so that the noise power of each subcarrier is determined.
And 303, based on the normal distribution model of the signal interference power, performing data selection on the normal distribution model according to the signal interference information, and determining the signal interference power of each subcarrier.
It should be noted that the number of electronic devices deployed by each superior site node and the signal interference power of each electronic device to the subcarrier in the communication environment are normally distributed according to the signal interference power; based on the normal distribution model of the signal interference power, performing data selection on the normal distribution model according to the signal interference information so as to determine the signal interference power of each electronic device to the subcarrier;
wherein the signal interference power of each electronic device to the subcarrier is set to
Figure 812449DEST_PATH_IMAGE034
Is shown in
Figure 280470DEST_PATH_IMAGE001
Access of communication node on time slot
Figure 564821DEST_PATH_IMAGE004
Electronic device for group upper station node in communication environment
Figure 446189DEST_PATH_IMAGE035
For subcarrier
Figure 615134DEST_PATH_IMAGE005
So that the signal interference power of each electronic device on the subcarrier is
Figure 796716DEST_PATH_IMAGE036
，NThe total number of electronic devices.
And step 304, respectively calculating the noise change rate and the signal interference change rate of each subcarrier according to the noise power and the signal interference power.
It should be noted that, based on the change information of the noise power and the signal interference power in the noise bank, the noise change rate and the signal interference rate of the power line carrier can be obtained;
wherein, the calculation formula of the noise change rate is as follows:
Figure 189651DEST_PATH_IMAGE012
in the formula:
Figure 89474DEST_PATH_IMAGE008
is shown in
Figure 390006DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 564110DEST_PATH_IMAGE005
Subcarrier access of
Figure 190264DEST_PATH_IMAGE004
The noise change rate of the group superordinate site node;
Figure 249487DEST_PATH_IMAGE001
is shown as
Figure 619288DEST_PATH_IMAGE001
A time slot;
Figure 509884DEST_PATH_IMAGE009
is shown in
Figure 447884DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 791141DEST_PATH_IMAGE005
Subcarrier access of
Figure 839999DEST_PATH_IMAGE004
Noise power of the group superordinate station node;
Figure 850681DEST_PATH_IMAGE013
is shown in
Figure 756320DEST_PATH_IMAGE014
Communication node passes through on one time slot
Figure 586872DEST_PATH_IMAGE005
Subcarrier access of
Figure 436492DEST_PATH_IMAGE004
Noise power of nodes of a group superior site;
the calculation formula of the signal interference change rate is as follows:
Figure 504942DEST_PATH_IMAGE015
in the formula:
Figure 643800DEST_PATH_IMAGE010
is shown in
Figure 837015DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 227676DEST_PATH_IMAGE005
Subcarrier access of
Figure 150633DEST_PATH_IMAGE004
The signal interference change rate of the group superordinate site node;
Figure 194812DEST_PATH_IMAGE001
is shown as
Figure 999957DEST_PATH_IMAGE001
A time slot;
Figure 191379DEST_PATH_IMAGE011
is shown in
Figure 968842DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 183923DEST_PATH_IMAGE005
Sub-carrier access of
Figure 882889DEST_PATH_IMAGE004
Signal interference power of a group of superior site nodes;
Figure 208828DEST_PATH_IMAGE016
is shown in
Figure 309639DEST_PATH_IMAGE014
Communication node passes through on one time slot
Figure 961200DEST_PATH_IMAGE005
Sub-carrier access of
Figure 678621DEST_PATH_IMAGE004
Signal interference power of the group superordinate site node.
And 305, calculating the signal-to-interference-and-noise ratio change value of each subcarrier associated with each superior site node by adopting the noise power, the signal interference power, the noise change rate and the signal interference change rate.
The calculation formula of the signal to interference plus noise ratio variation value is as follows:
Figure 808251DEST_PATH_IMAGE002
in the formula:
Figure 760639DEST_PATH_IMAGE003
which represents a communication node that is,
Figure 583101DEST_PATH_IMAGE004
is shown as
Figure 787818DEST_PATH_IMAGE004
The nodes of the upper-level site of the group,
Figure 986718DEST_PATH_IMAGE005
is shown as
Figure 390017DEST_PATH_IMAGE005
The number of sub-carriers is such that,
Figure 524326DEST_PATH_IMAGE001
denotes the first
Figure 278656DEST_PATH_IMAGE001
A time slot;
Figure 15668DEST_PATH_IMAGE006
is shown in
Figure 679998DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 844263DEST_PATH_IMAGE005
Subcarrier access of
Figure 23572DEST_PATH_IMAGE004
The signal-to-interference-and-noise ratio variation value of the nodes of the upper-level station of the group;
Figure 298696DEST_PATH_IMAGE007
is shown in
Figure 676587DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 438786DEST_PATH_IMAGE005
Subcarrier access of
Figure 839812DEST_PATH_IMAGE004
A receiving end signal of a group superior site node;
Figure 184205DEST_PATH_IMAGE008
is shown in
Figure 151024DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 63617DEST_PATH_IMAGE005
Subcarrier access of
Figure 14255DEST_PATH_IMAGE004
The noise change rate of the group superordinate site node;
Figure 631181DEST_PATH_IMAGE009
is shown in
Figure 983665DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 67159DEST_PATH_IMAGE005
Subcarrier access of
Figure 442777DEST_PATH_IMAGE004
Noise power of the group superordinate station node;
Figure 128973DEST_PATH_IMAGE010
is shown in
Figure 70384DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 321849DEST_PATH_IMAGE005
Sub-carrier access of
Figure 247080DEST_PATH_IMAGE004
The signal interference change rate of the group superordinate site node;
Figure 409071DEST_PATH_IMAGE011
is shown in
Figure 736147DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 489339DEST_PATH_IMAGE005
Subcarrier access of
Figure 42812DEST_PATH_IMAGE004
Signal interference power of the group superordinate site node.
It should be noted that, if the noise power and the signal interference caused by the electronic device are higher, the influence of the noise and the signal interference on the subcarrier signal is larger, and the transmission performance is worse; meanwhile, the higher the noise change rate and the signal interference change rate are, the worse the subcarrier stability is.
And step 306, selecting the subcarriers with the signal to interference plus noise ratio variation values larger than the signal to interference plus noise threshold as the available subcarriers, and counting the number of the available subcarriers corresponding to each superior site node.
In the embodiment of the application, whether the subcarrier is available is determined by comparing the signal to interference plus noise ratio variation value with the signal to interference plus noise threshold, and the subcarrier with the signal to interference plus noise ratio variation value larger than the signal to interference plus noise threshold is selected as the available subcarrier; adding available subcarriers to a set of available subcarriers
Figure 70811DEST_PATH_IMAGE028
，
Figure 986814DEST_PATH_IMAGE037
In which will be
Figure 583012DEST_PATH_IMAGE019
And recording the number of the available subcarriers corresponding to each superior site node.
And 307, calculating the networking similarity of each superior station node according to the operation noise, the signal interference information, the load information, the node backlog quantity and the available subcarrier quantity.
It should be noted that, due to the difference in transmission performance of different upper node nodes, the node backlog amount of each upper node also differs, and meanwhile, the upper node is also affected by the access load information of the upper node;
the calculation formula of the networking similarity is as follows:
Figure 217255DEST_PATH_IMAGE017
in the formula:
Figure 721049DEST_PATH_IMAGE018
is shown in
Figure 757138DEST_PATH_IMAGE001
Access of communication node on time slot
Figure 383291DEST_PATH_IMAGE004
Networking similarity of nodes of the group superior station;
Figure 642847DEST_PATH_IMAGE019
is shown in
Figure 12648DEST_PATH_IMAGE001
Access of communication node on time slot
Figure 106506DEST_PATH_IMAGE004
The number of available subcarriers of the group of superior site nodes;
Figure 903561DEST_PATH_IMAGE020
is shown in
Figure 246818DEST_PATH_IMAGE001
On one time slot
Figure 295676DEST_PATH_IMAGE004
The backlog number of nodes of the group superior site;
Figure 306358DEST_PATH_IMAGE021
representing the subcarrier number difference weight,
Figure 8734DEST_PATH_IMAGE022
is shown in
Figure 104866DEST_PATH_IMAGE001
On a time slot
Figure 957416DEST_PATH_IMAGE004
The number of subcarriers of the group of superior site nodes;
Figure 760287DEST_PATH_IMAGE023
is shown in
Figure 899144DEST_PATH_IMAGE001
The communication node accesses the first time slot through the available sub-carrier
Figure 355009DEST_PATH_IMAGE004
Noise and signal interference degree of the nodes of the group superior station;
Figure 807987DEST_PATH_IMAGE024
representing the access load weight of the superordinate station node,
Figure 262102DEST_PATH_IMAGE025
is shown in
Figure 712806DEST_PATH_IMAGE001
On one time slot
Figure 783530DEST_PATH_IMAGE004
The access load of the group superior site node;
wherein,
Figure 571357DEST_PATH_IMAGE026
in the formula:
Figure 552083DEST_PATH_IMAGE023
is shown in
Figure 32743DEST_PATH_IMAGE001
The communication node accesses the first time slot through the available sub-carrier
Figure 528446DEST_PATH_IMAGE004
Noise and signal interference degree of the nodes of the group superior station;
Figure 119965DEST_PATH_IMAGE027
the weights representing the noise and the signal interference,
Figure 548672DEST_PATH_IMAGE028
is shown in
Figure 465812DEST_PATH_IMAGE001
Access of communication node on time slot
Figure 383565DEST_PATH_IMAGE004
The set of available subcarriers for the group of superordinate site nodes,
Figure 716458DEST_PATH_IMAGE008
、
Figure 530830DEST_PATH_IMAGE009
、
Figure 87713DEST_PATH_IMAGE010
and
Figure 495692DEST_PATH_IMAGE011
are respectively shown at
Figure 694592DEST_PATH_IMAGE001
Communication node passes through on one time slot
Figure 97892DEST_PATH_IMAGE005
Subcarrier access of
Figure 232201DEST_PATH_IMAGE004
Noise change rate, noise power, signal to interference change rate, and signal to interference power of the group superordinate site node.
If more usable subcarriers are available when the communication node is networked with the superior site node, the networking similarity is higher; the smaller the node backlog number and the access load of the nodes of the superior station are, the smaller the difference value between the data uploading subcarrier of the nodes of the superior station and the number of the usable subcarriers accessed by the communication nodes is, the smaller the noise power and the signal interference power as well as the noise change rate and the signal interference change rate are, and the higher the networking similarity is.
And 308, selecting the superior site node with the maximum networking similarity as the target site node, and connecting the superior site node to the target site node through the available subcarriers.
In the embodiment of the application, a superior site node to which the maximum networking similarity belongs is selected as a target site node, and the communication node is connected to the target site node through the available subcarrier, so that hierarchical networking is completed and subsequent information transmission is performed.
In the examples of this application, when in
Figure 924213DEST_PATH_IMAGE001
When receiving the running noise and signal interference information of a plurality of subcarriers returned by each superior site node in response to the networking request, acquiring load information and node backlog quantity corresponding to each superior site node; performing noise power retrieval on a noise library through operating noise, and determining the noise power of each subcarrier; based on a normal distribution model of the signal interference power, performing data selection on the normal distribution model according to the signal interference information, and determining the signal interference power of each subcarrier; respectively calculating the noise change rate and the signal interference change rate of each subcarrier according to the noise power and the signal interference power; calculating the signal-to-interference-and-noise ratio variation value of each subcarrier associated with each superior site node by adopting the noise power, the signal interference power, the noise variation rate and the signal interference variation rate; selecting a SINR variation value greater thanThe sub-carrier of the signal noise threshold value is used as an available sub-carrier, and the number of the available sub-carriers of the available sub-carrier corresponding to each superior site node is counted; calculating the networking similarity of each superior site node according to the operation noise, the signal interference information, the load information, the node backlog number and the available subcarrier number; the upper-level station node to which the maximum networking similarity belongs is selected as a target station node, and is connected to the target station node through the available subcarriers, so that the dynamic changes of noise and signal interference are considered, the current available subcarrier quantity is accurately judged, meanwhile, the difference between the backlog of node data and the available subcarrier quantity between the upper-level network and the lower-level network is also considered, the subcarrier quantity and the node requirement adaptability are improved, and the transmission congestion phenomenon of the upper-level network and the lower-level network is avoided.
Referring to fig. 4, fig. 4 is a block diagram of a power line carrier hierarchical networking device based on noise according to an embodiment of the present invention.
The invention also provides a noise-based power line carrier hierarchical networking device, which is applied to communication nodes in a power line carrier networking framework, wherein the power line carrier networking framework further comprises a plurality of superior site nodes, and the device comprises:
an information returning module 401 for
Figure 395646DEST_PATH_IMAGE001
When receiving the running noise and signal interference information of a plurality of subcarriers returned by each superior site node in response to the networking request, acquiring load information and node backlog quantity corresponding to each superior site node; wherein,
Figure 57047DEST_PATH_IMAGE001
is a positive integer;
a signal-to-interference ratio calculation module 402, configured to calculate, based on the operating noise and the signal interference information, a signal-to-interference-and-noise ratio variation value of each subcarrier associated with each superordinate site node;
a subcarrier selection module 403, configured to select subcarriers with snr (signal to interference plus noise ratio) variation values larger than an snr threshold as available subcarriers, and count the number of available subcarriers of the available subcarriers corresponding to each superordinate station node;
a networking similarity calculation module 404, configured to calculate networking similarity of each superordinate site node according to operation noise, signal interference, load information, the number of node backlogs, and the number of available subcarriers;
and a networking connection module 405, configured to select a higher-level site node to which the maximum networking similarity belongs as a target site node, and connect to the target site node through an available subcarrier.
The signal-to-noise ratio calculation module 402 includes:
the noise power determination submodule is used for performing noise power retrieval on a noise library through operating noise and determining the noise power of each subcarrier;
the signal interference power determining submodule is used for performing data selection on the normal distribution model according to the signal interference information based on the normal distribution model of the signal interference power and determining the signal interference power of each subcarrier;
the change rate calculation sub-module is used for respectively calculating the noise change rate and the signal interference change rate of each subcarrier according to the noise power and the signal interference power;
and the signal-to-noise ratio calculation submodule is used for calculating the signal-to-interference-and-noise ratio change value of each subcarrier associated with each superior site node by adopting the noise power, the signal interference power, the noise change rate and the signal interference change rate.
In the embodiments of the present application, when in the second embodiment
Figure 486891DEST_PATH_IMAGE001
When receiving the running noise and signal interference information of a plurality of subcarriers returned by each superior site node in response to the networking request, each time slot acquires the load information and the node backlog number corresponding to each superior site node; performing noise power retrieval on a noise library through operating noise, and determining the noise power of each subcarrier; based on a normal distribution model of the signal interference power, performing data selection on the normal distribution model according to the signal interference information, and determining the signal interference power of each subcarrier; according to the noiseRespectively calculating the noise change rate and the signal interference change rate of each subcarrier by using the acoustic power and the signal interference power; calculating the signal-to-interference-and-noise ratio variation value of each subcarrier associated with each superior site node by adopting the noise power, the signal interference power, the noise variation rate and the signal interference variation rate; selecting the sub-carriers with the signal to interference plus noise ratio variation value larger than the signal to interference plus noise threshold as available sub-carriers, and counting the number of the available sub-carriers corresponding to each superior site node; calculating the networking similarity of each superior site node according to the operation noise, the signal interference information, the load information, the node backlog number and the available subcarrier number; the upper-level station node to which the maximum networking similarity belongs is selected as a target station node, and is connected to the target station node through the available subcarriers, so that the dynamic changes of noise and signal interference are considered, the current available subcarrier quantity is accurately judged, meanwhile, the difference between the backlog of node data and the available subcarrier quantity between the upper-level network and the lower-level network is also considered, the subcarrier quantity and the node requirement adaptability are improved, and the transmission congestion phenomenon of the upper-level network and the lower-level network is avoided.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
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. For example, the above-described apparatus embodiments are merely illustrative.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A power line carrier hierarchical networking method based on noise is applied to communication nodes in a power line carrier networking architecture, the power line carrier networking architecture further comprises a plurality of upper-level site nodes, and the method comprises the following steps:
when in
Figure QLYQS_1
When receiving the running noise and signal interference information of a plurality of subcarriers returned by each superior site node in response to a networking request, each time slot acquires load information and node backlog quantity corresponding to each superior site node; wherein,
Figure QLYQS_2
is a positive integer;
calculating the signal-to-interference-and-noise ratio variation value of each subcarrier associated with each superior site node based on the operation noise and the signal interference information;
selecting the sub-carriers with the signal to interference plus noise ratio variation value larger than a signal to interference plus noise threshold value as available sub-carriers, and counting the number of the available sub-carriers corresponding to each superior site node;
calculating networking similarity of each superior site node according to the operation noise, the signal interference information, the load information, the node backlog number and the number of available subcarriers;
and selecting the superior site node to which the maximum networking similarity belongs as a target site node, and connecting the superior site node to the target site node through the available subcarriers.
2. The method according to claim 1, wherein the step of calculating a change value of the sir of each subcarrier associated with each superordinate site node based on the operating noise and the sir information comprises:
performing noise power retrieval on a noise library through the operation noise, and determining the noise power of each subcarrier;
based on a normal distribution model of signal interference power, performing data selection on the normal distribution model according to the signal interference information, and determining the signal interference power of each subcarrier;
respectively calculating the noise change rate and the signal interference change rate of each subcarrier according to the noise power and the signal interference power;
and calculating the signal-to-interference-and-noise ratio change value of each subcarrier associated with each superior site node by adopting the noise power, the signal interference power, the noise change rate and the signal interference change rate.
3. The hierarchical networking method for power line carrier based on noise according to claim 2, wherein the formula for calculating the variation value of the signal to interference plus noise ratio is as follows:
Figure QLYQS_3
in the formula:
Figure QLYQS_5
which represents a communication node that is,
Figure QLYQS_7
is shown as
Figure QLYQS_9
The nodes of the upper-level site of the group,
Figure QLYQS_12
is shown as
Figure QLYQS_14
The number of sub-carriers is such that,
Figure QLYQS_18
denotes the first
Figure QLYQS_20
A time slot;
Figure QLYQS_22
is shown in
Figure QLYQS_27
Communication node passes through on one time slot
Figure QLYQS_29
Subcarrier access of
Figure QLYQS_30
The signal-to-interference-and-noise ratio variation value of the nodes of the upper-level station of the group;
Figure QLYQS_31
is shown in
Figure QLYQS_32
Communication node passes through on one time slot
Figure QLYQS_33
Subcarrier access of
Figure QLYQS_34
A receiving end signal of a group superior site node;
Figure QLYQS_4
is shown in
Figure QLYQS_6
The communication node passes through the first on one time slot
Figure QLYQS_8
Subcarrier access of
Figure QLYQS_10
The noise change rate of the group superordinate site node;
Figure QLYQS_11
is shown in
Figure QLYQS_13
Communication node passes through on one time slot
Figure QLYQS_15
Subcarrier access of
Figure QLYQS_16
Noise power of the group superordinate station node;
Figure QLYQS_17
is shown in
Figure QLYQS_19
Communication node passes through on one time slot
Figure QLYQS_21
Subcarrier access of
Figure QLYQS_23
The signal interference change rate of the group superordinate site node;
Figure QLYQS_24
is shown in
Figure QLYQS_25
Communication node passes through on one time slot
Figure QLYQS_26
Subcarrier access of
Figure QLYQS_28
Signal interference power of the group superordinate site node.
4. The hierarchical power line carrier networking method based on noise according to claim 2, wherein the calculation formula of the noise change rate is as follows:
Figure QLYQS_35
in the formula:
Figure QLYQS_36
representing a communication node;
Figure QLYQS_39
is shown in
Figure QLYQS_41
Communication node passes through on one time slot
Figure QLYQS_43
Subcarrier access of
Figure QLYQS_45
The noise change rate of the group superordinate site node;
Figure QLYQS_48
denotes the first
Figure QLYQS_50
A time slot;
Figure QLYQS_37
is shown in
Figure QLYQS_38
Communication node passes through on one time slot
Figure QLYQS_40
Subcarrier access of
Figure QLYQS_42
Noise power of nodes of a group superior site;
Figure QLYQS_44
is shown in
Figure QLYQS_46
The communication node passes through the first on one time slot
Figure QLYQS_47
Subcarrier access of
Figure QLYQS_49
Noise power of the group superordinate station node;
the calculation formula of the signal interference change rate is as follows:
Figure QLYQS_51
in the formula:
Figure QLYQS_53
representing a communication node;
Figure QLYQS_55
is shown in
Figure QLYQS_58
Communication node passes through on one time slot
Figure QLYQS_61
Subcarrier access of
Figure QLYQS_62
The signal interference change rate of the group superior site node;
Figure QLYQS_63
is shown as
Figure QLYQS_65
A time slot;
Figure QLYQS_52
is shown in
Figure QLYQS_54
Communication node passes through on one time slot
Figure QLYQS_56
Subcarrier access of
Figure QLYQS_57
Signal interference power of a group of superior site nodes;
Figure QLYQS_59
is shown in
Figure QLYQS_60
Communication node passes through on one time slot
Figure QLYQS_64
Subcarrier access of
Figure QLYQS_66
Signal interference power of the group superordinate site node.
5. The hierarchical networking method for power line carrier based on noise according to claim 1, wherein the computing formula of the networking similarity is as follows:
Figure QLYQS_67
in the formula:
Figure QLYQS_82
representing a communication node;
Figure QLYQS_83
is shown in
Figure QLYQS_84
Access of communication node on time slot
Figure QLYQS_85
Networking similarity of nodes of the group superior station;
Figure QLYQS_86
is shown in
Figure QLYQS_87
Access of communication node on time slot
Figure QLYQS_88
The number of available subcarriers of the nodes of the group superior site;
Figure QLYQS_68
is shown in
Figure QLYQS_70
On a time slot
Figure QLYQS_72
The node backlog quantity of the nodes of the group upper-level station;
Figure QLYQS_74
representing the subcarrier number difference weight,
Figure QLYQS_76
is shown in
Figure QLYQS_78
On a time slot
Figure QLYQS_79
The number of subcarriers of the group of superior site nodes;
Figure QLYQS_81
is shown in
Figure QLYQS_69
The communication node accesses the first time slot through the available sub-carrier
Figure QLYQS_71
Noise and signal interference degree of the nodes of the group superior station;
Figure QLYQS_73
representing the access load weight of the superordinate station node,
Figure QLYQS_75
is shown in
Figure QLYQS_77
On a time slot
Figure QLYQS_80
The access load of the group superior site node;
wherein,
Figure QLYQS_89
in the formula:
Figure QLYQS_91
representing a communication node;
Figure QLYQS_93
is shown in
Figure QLYQS_95
The communication node accesses the first time slot through the available sub-carrier
Figure QLYQS_98
Noise and signal interference degree of the nodes of the group superior station;
Figure QLYQS_101
the weights representing the noise and the signal interference,
Figure QLYQS_103
is shown in
Figure QLYQS_104
Access of communication node on time slot
Figure QLYQS_90
The set of available subcarriers for the group of superordinate site nodes,
Figure QLYQS_92
、
Figure QLYQS_94
、
Figure QLYQS_96
and
Figure QLYQS_97
are respectively shown at
Figure QLYQS_99
Communication node passes through on one time slot
Figure QLYQS_100
Subcarrier access of
Figure QLYQS_102
Noise change rate, noise power, signal to interference change rate, and signal to interference power of the group superordinate site node.
6. The utility model provides a hierarchical network deployment device of power line carrier based on noise which characterized in that is applied to the communication node in the power line carrier network deployment structure, power line carrier network deployment structure still includes a plurality of higher level website nodes, the device includes:
information return module for use in the second place
Figure QLYQS_105
When receiving the operation noise and signal interference information of a plurality of subcarriers returned by each superior site node responding to the networking request, acquiring the operation noise and signal interference informationLoad information and node backlog quantity corresponding to each superior site node; wherein,
Figure QLYQS_106
is a positive integer;
a signal to interference plus noise ratio calculation module, configured to calculate, based on the operating noise and the signal interference information, a signal to interference plus noise ratio variation value of each subcarrier associated with each superordinate site node;
a subcarrier selecting module, configured to select a subcarrier with the sir variation value greater than a snr threshold as an available subcarrier, and count the number of available subcarriers of the available subcarriers corresponding to each superordinate station node;
the networking similarity calculation module is used for calculating the networking similarity of each superior site node according to the operation noise, the signal interference information, the load information, the node backlog number and the available subcarrier number;
and the networking connection module is used for selecting the superior site node to which the maximum networking similarity belongs as a target site node and connecting the superior site node to the target site node through the available subcarriers.
7. The hierarchical networking device for power line carrier based on noise according to claim 6, wherein the SINR calculation module comprises:
the noise power determination submodule is used for carrying out noise power retrieval on a noise library through the operation noise and determining the noise power of each subcarrier;
the signal interference power determining submodule is used for performing data selection on a normal distribution model based on the signal interference power according to the signal interference information and determining the signal interference power of each subcarrier;
the change rate calculation submodule is used for respectively calculating the noise change rate and the signal interference change rate of each subcarrier according to the noise power and the signal interference power;
and the signal to interference plus noise ratio calculation submodule is used for calculating the signal to interference plus noise ratio change value of each subcarrier associated with each superior site node by adopting the noise power, the signal to interference power, the noise change rate and the signal to interference change rate.
8. The hierarchical power line carrier networking device based on noise according to claim 7, wherein the SINR variation is calculated by the following formula:
Figure QLYQS_107
in the formula:
Figure QLYQS_109
it is meant to represent a communication node,
Figure QLYQS_110
is shown as
Figure QLYQS_113
The nodes of the upper-level sites of the group,
Figure QLYQS_118
denotes the first
Figure QLYQS_121
The number of sub-carriers is such that,
Figure QLYQS_122
is shown as
Figure QLYQS_125
A time slot;
Figure QLYQS_127
is shown in
Figure QLYQS_129
Communication node passes through on one time slot
Figure QLYQS_131
Subcarrier access of
Figure QLYQS_133
The signal-to-interference-and-noise ratio variation value of the nodes of the upper-level station of the group;
Figure QLYQS_134
is shown in
Figure QLYQS_136
Communication node passes through on one time slot
Figure QLYQS_137
Subcarrier access of
Figure QLYQS_138
A receiving end signal of a group superior site node;
Figure QLYQS_108
is shown in
Figure QLYQS_111
Communication node passes through on one time slot
Figure QLYQS_112
Subcarrier access of
Figure QLYQS_114
The noise change rate of the group superordinate site node;
Figure QLYQS_115
is shown in
Figure QLYQS_116
Communication node passes through on one time slot
Figure QLYQS_117
Subcarrier access of
Figure QLYQS_119
Noise power of nodes of a group superior site;
Figure QLYQS_120
is shown in
Figure QLYQS_123
The communication node passes through the first on one time slot
Figure QLYQS_124
Subcarrier access of
Figure QLYQS_126
The signal interference change rate of the group superior site node;
Figure QLYQS_128
is shown in
Figure QLYQS_130
Communication node passes through on one time slot
Figure QLYQS_132
Subcarrier access of
Figure QLYQS_135
Signal interference power of the group superordinate site node.
9. The hierarchical noise-based power line carrier networking device according to claim 7, wherein the calculation formula of the noise change rate is:
Figure QLYQS_139
in the formula:
Figure QLYQS_141
representing a communication node;
Figure QLYQS_142
is shown in
Figure QLYQS_144
Communication node passes through on one time slot
Figure QLYQS_146
Subcarrier access of
Figure QLYQS_148
The noise change rate of the group superordinate site node;
Figure QLYQS_152
is shown as
Figure QLYQS_154
A time slot;
Figure QLYQS_140
is shown in
Figure QLYQS_143
Communication node passes through on one time slot
Figure QLYQS_145
Subcarrier access of
Figure QLYQS_147
Noise power of the group superordinate station node;
Figure QLYQS_149
is shown in
Figure QLYQS_150
The communication node passes through the first on one time slot
Figure QLYQS_151
Subcarrier access of
Figure QLYQS_153
Noise power of the group superordinate station node;
the calculation formula of the signal interference change rate is as follows:
Figure QLYQS_155
in the formula:
Figure QLYQS_157
representing a communication node;
Figure QLYQS_158
is shown in
Figure QLYQS_160
Communication node passes through on one time slot
Figure QLYQS_163
Subcarrier access of
Figure QLYQS_165
The signal interference change rate of the group superior site node;
Figure QLYQS_166
is shown as
Figure QLYQS_168
A time slot;
Figure QLYQS_156
is shown in
Figure QLYQS_159
The communication node passes through the first on one time slot
Figure QLYQS_161
Subcarrier access of
Figure QLYQS_162
Signal interference power of a group of superior site nodes;
Figure QLYQS_164
is shown in
Figure QLYQS_167
Communication node passes through on one time slot
Figure QLYQS_169
Subcarrier access of
Figure QLYQS_170
Signal interference power of the group superordinate site node.
10. The hierarchical networking device for power line carrier based on noise according to claim 6, wherein the computing formula of the networking similarity is as follows:
Figure QLYQS_171
in the formula:
Figure QLYQS_184
representing a communication node;
Figure QLYQS_186
is shown in
Figure QLYQS_188
Access of communication node on time slot
Figure QLYQS_189
Networking similarity of nodes of the group superior station;
Figure QLYQS_190
is shown in
Figure QLYQS_191
Access of communication node on time slot
Figure QLYQS_192
The number of available subcarriers of the group of superior site nodes;
Figure QLYQS_172
is shown in
Figure QLYQS_175
On one time slot
Figure QLYQS_177
The node backlog quantity of the nodes of the group upper-level station;
Figure QLYQS_179
representing the subcarrier number difference weight,
Figure QLYQS_182
is shown in
Figure QLYQS_183
On a time slot
Figure QLYQS_185
The number of subcarriers of the group of superior site nodes;
Figure QLYQS_187
is shown in
Figure QLYQS_173
The communication node accesses the first time slot through the available sub-carrier
Figure QLYQS_174
Noise and signal interference degree of the nodes of the group superior station;
Figure QLYQS_176
representing the access load weight of the superordinate station node,
Figure QLYQS_178
is shown in
Figure QLYQS_180
On one time slot
Figure QLYQS_181
The access load of the group superior site node;
wherein,
Figure QLYQS_193
in the formula:
Figure QLYQS_195
representing a communication node;
Figure QLYQS_196
is shown in
Figure QLYQS_199
The communication node accesses the first time slot through the available sub-carrier
Figure QLYQS_201
Noise and signal interference degree of the nodes of the group superior station;
Figure QLYQS_203
the weights representing the noise and the signal interference,
Figure QLYQS_205
is shown in
Figure QLYQS_208
Access of communication node on time slot
Figure QLYQS_194
The set of available subcarriers for the group of superordinate site nodes,
Figure QLYQS_197
、
Figure QLYQS_198
、
Figure QLYQS_200
and
Figure QLYQS_202
are respectively shown in
Figure QLYQS_204
Communication node passes through on one time slot
Figure QLYQS_206
Subcarrier access of
Figure QLYQS_207
Noise change rate, noise power, signal to interference change rate, and signal to interference power of the group superordinate site node.
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