CN102291302A - Local routing reconstruction method in power line carrier communication network of low-voltage electric distribution network - Google Patents
Local routing reconstruction method in power line carrier communication network of low-voltage electric distribution network Download PDFInfo
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Abstract
The invention discloses a local routing reconstruction method in a power line carrier communication network of a low-voltage electric distribution network, which relates to the field of power line communication and solves the problems of low efficiency of reconstruction, poor accuracy in reading meters and low utilization rate of channels of a node routing reconstruction method in the existing automatic meter reading system. In the method, an automatic meter reading system network layer and a MAC (Media Access Control) layer are analyzed and researched, after networking via a special network structure, namely an artificial logical spider-web, a central node in a sub-network is responsible for rerouting local blind spots of the sub-network, and is free from executing the routing reconstruction for all the nodes in the network, so that time for searching routing is saved, and communication efficiency and reliability are improved. The method provided by the invention is suitable for routing reconstruction in the power line carrier communication network of the low-voltage electric distribution network.
Description
Technical field
The present invention relates to the power line communication field, be specifically related to a kind of route reconstructing method.
Background technology
After the artificial spider web networking of electric power Automatic meter reading system MAC layer finished, because there is relatively serious situation in channel disturbance, terminal node still may be communicated by letter unsuccessful with Centroid in each subnet.In such cases, reliably and efficiently the blind spot heavy route method is very important to the service quality that guarantees whole Automatic meter reading system.Present mainly contains following two kinds at node route reconfiguration technique.
First kind of power line communication routing algorithm that is based on sub-clustering thought, power line communication sub-clustering algorithm mainly comprises netinit algorithm and network reconfiguration algorithm, effectively the communication radius of extended power line communication network.The problem that this method exists is, in case network terminal node need carry out sub-clustering again to all nodes of whole network, route reconstruct because the channel circumstance variation can not be communicated by letter with a bunch head.This situation has increased data collection cycle, the time delay of system greatly, has reduced the efficient and the meter reading accuracy of Automatic meter reading system.
Second kind is based on intelligent algorithm, the routing optimality algorithm of the power line communication network of ant group optimization thought for example, these algorithms be based upon network can connective basis on, optimization aim is a minimum hop count, seeks source node to the optimal path between the destination node in power line communication network.Equally, use ant colony optimization algorithm,, still need all nodes in the network are carried out again the choosing etc. of route search, relay point node if because channel circumstance changes the communication blind spot that causes.Though Automatic meter reading system is less demanding to the time, but because channel circumstance changes frequently, the frequency that blind spot occurred after networking was finished is still than higher, what needs were regular carries out route reconstruct to all nodes in the system, increased the amount of calculation of node, and cause the data collision of bus-type channel easily, reduce channel utilization.
Summary of the invention
The present invention is in order to solve in the existing Automatic meter reading system reconstruct efficient, the meter reading poor accuracy at node route reconstructing method, and the low problem of channel utilization, and local route reconstructing method in a kind of low-voltage network power line carrier communication network is provided.
Local route reconstructing method in the low-voltage network power line carrier communication network, it is realized by following steps:
Data broadcasting is initiated in base station in step 1, the low-voltage network power line carrier communication network, m G node in the MAC layer of low-voltage network power line carrier communication network receives the data broadcasting of base station, and form the n straton net of m-1 limit individual layer spider web logical topology structure at the MAC layer, m is the integer greater than 1, n=1;
The Centroid h of step 4, n straton net
nInitiate data broadcasting once more;
K node receiving center node h in the MAC layer of step 5, low-voltage network power line carrier communication network
nThe data of broadcasting, all nodes that will obtain logic ID are then rejected, and k-m node of remainder formed n+1 straton net, and node of selection is as the Centroid h of this straton net in described n+1 straton net
N+1, described Centroid h
N+1All can directly carry out data communication with all the other any one nodes in the n+1 straton net, this Centroid h
N+1To each the node assignment logic ID in the n+1 straton net; Make n=n+1, m=k-m returns execution in step four, and remaining B node is searched for, and all realizes direct communication or trunking traffic with the base station until all nodes, finishes the foundation of communication network in the MAC layer of low-voltage network power line carrier communication network; K is the integer greater than m;
Step 6, upgrade channel circumstance, for every straton net: Centroid judges whether the data from each all mid-side node in this straton net received by logic ID, if judged result is for being then to finish the route reconstruct of this straton net; If judged result is that then this straton net need not carry out route reconstruct; Need the subnet of route reconstruct at each, execution in step seven and eight is carried out route reconstruct to this subnet;
Step 7, judge whether each all mid-side node that can not communicate by letter with the Centroid of this subnet in this straton net can communicate with the adjacent node of this week mid-side node in this straton net one by one, if the judged result of all mid-side nodes is for denying, then return step 1, carry out networking again; Otherwise, execution in step eight;
The Centroid of step 8, this straton net send instruction to each do not receive the adjacent node of all mid-side nodes in this straton net of data, initiation is to described route reconstruct broadcasting of not receiving each all mid-side node of data, set up and do not receive each all mid-side node of data and the handshake mechanism between the adjacent node of this week mid-side node in this straton net, and then realize trunking traffic between the Centroid of all mid-side nodes that all do not receive data and this straton net, and finish local route reconstruct to this straton net;
Step 9, after all straton nets are all finished local route reconstruct, realize local route reconstruct to Automatic meter reading system;
The G node for can be directly and the base station carry out the node of point-to-point communication;
The B node is that the influence that is subjected to channel status can not directly communicate with the base station, but can be adjacent the node that node communicates.
Beneficial effect: the present invention is by the analysis and research to low-voltage network power line carrier communication network layer and MAC layer, after utilizing this ad hoc network structure of artificial spider web to make that networking is finished, the Centroid of subnet is responsible for the blind spot of subnet part is carried out heavy-route, need not carry out heavy-route to the whole nodes of network, save pathfinding by time, improve communication efficiency and reliability, improve the meter reading poor accuracy, channel utilization is higher.
Description of drawings
Fig. 1 is the principle schematic of bus-type physical topology described in the specific embodiment of the present invention one, and mark G is the G node, and mark B is the B node; Fig. 2 is artificial spider web communication logic topology theory schematic diagram; Fig. 3 is that networking result schematic diagram mark G is the G node in the embodiment one, and mark B is the B node; Fig. 4 is a blind spot route reconfiguration principle schematic diagram in the embodiment one, and mark G is the G node, and mark B is the B node; Fig. 5 is the blind spot heavy-route sequential chart described in the embodiment one.
Embodiment
Local route reconstructing method in embodiment one, the low-voltage network power line carrier communication network, it is realized by following steps:
Data broadcasting is initiated in base station in step 1, the low-voltage network power line carrier communication network, m G node in the MAC layer of low-voltage network power line carrier communication network receives the data broadcasting of base station, and form the n straton net of m-1 limit individual layer spider web logical topology structure at the MAC layer, m is the integer greater than 1, n=1;
The Centroid h of step 4, n straton net
nInitiate data broadcasting once more;
K node receiving center node h in the MAC layer of step 5, low-voltage network power line carrier communication network
nThe data of broadcasting, all nodes that will obtain logic ID are then rejected, and k-m node of remainder formed n+1 straton net, and node of selection is as the Centroid h of this straton net in described n+1 straton net
N+1, described Centroid h
N+1All can directly carry out data communication with all the other any one nodes in the n+1 straton net, this Centroid h
N+1To each the node assignment logic ID in the n+1 straton net; Make n=n+1, m=k-m returns execution in step four, and remaining B node is searched for, and all realizes direct communication or trunking traffic with the base station until all nodes, finishes the foundation of communication network in the MAC layer of low-voltage network power line carrier communication network; K is the integer greater than m;
Step 6, upgrade channel circumstance, for every straton net: Centroid judges whether the data from each all mid-side node in this straton net received by logic ID, if judged result is for being then to finish the route reconstruct of this straton net; If judged result is that then this straton net need not carry out route reconstruct; Need the subnet of route reconstruct at each, execution in step seven and eight is carried out route reconstruct to this subnet;
Step 7, judge whether each all mid-side node that can not communicate by letter with the Centroid of this subnet in this straton net can communicate with the adjacent node of this week mid-side node in this straton net one by one, if the judged result of all mid-side nodes is for denying, then return step 1, carry out networking again; Otherwise, execution in step eight;
The Centroid of step 8, this straton net send instruction to each do not receive the adjacent node of all mid-side nodes in this straton net of data, initiation is to described route reconstruct broadcasting of not receiving each all mid-side node of data, set up and do not receive each all mid-side node of data and the handshake mechanism between the adjacent node of this week mid-side node in this straton net, and then realize trunking traffic between the Centroid of all mid-side nodes that all do not receive data and this straton net, and finish local route reconstruct to this straton net;
Step 9, after all straton nets are all finished local route reconstruct, realize local route reconstruct to Automatic meter reading system;
The G node for can be directly and the base station carry out the node of point-to-point communication;
The B node is that the influence that is subjected to channel status can not directly communicate with the base station, but can be adjacent the node that node communicates.
Principle: shown in Figure 1 is the bus-type physical topology of Automatic meter reading system in certain unit building.Data acquisition broadcasting is initiated in the base station because broadcast singal decays with transmission range, only from the base station closer terminal node can with the direct reliable communication in base station, be the G node.Other nodes can not receive the broadcast message of base station, data can not be sent to the base station, but can point-to-point communication between the adjacent node, are the B node.
Among Fig. 1, all nodes in the 1st straton net all can with base station direct communication, direct point-to-point communication or communicate between the node by via node.Each node can equivalence be the logical topology of the artificial spider web of individual layer shown in Figure 2 at the MAC layer in the characteristics according to this, the 1st straton net.As shown in Figure 2, m terminal node constitutes the individual layer spider web on a m-1 limit, and h is any one in m the node, node h can with all node direct communications in the subnet, can point-to-point communication between adjacent node, non-conterminous node is that relaying communicates with Centroid h.
Centroid h is to all the other m-1 in the subnet terminal node assignment logic ID, till all nodes all obtain logic ID.
Send broadcasting once more by node h.Node h is with respect to the base station, and is nearer with the physical distance of B node, and the node number of receiving node h broadcast message is that (k＞m), select a node in k-m node that does not have a logic ID is Centroid to k, and to this k-m node assignment logic ID.
The Centroid of second subnet sends broadcasting once more, and the B node is explored.As still have new node, and then repeating step 5, choose Centroid, and assignment logic ID is not till having new blind spot; If there is not new node, the Centroid of a then above subnet is a relaying, sends the search ending message to the base station.The last networking result of MAC layer as shown in Figure 3, promptly searching all blind spots with 3 subnets is example.
After networking was finished, all nodes were that relaying keeps communicating by letter with the base station with the Centroid of each subnet in the network, but because channel circumstance changes, still have all mid-side nodes that can not communicate by letter with Centroid in the subnet, as shown in Figure 3.
With the 2nd straton net is example, and Centroid n receives in the data from all mid-side nodes, by decision logic ID, confirms not receive the data of node r, waits for a period of time, and confirms the state of node r.
The node p adjacent with node r, q still can keep communicating by letter with Centroid n, the data processing of elapsed time PT (Process Time), and node n sends request data package RP (Request Packet) to node p, q is initiated the heavy-route of node r is broadcasted by this two node.
After node p received request data package RP, elapsed time PT sent request data package RP to node r, q elapsed time WT (Wait Time) (WT＞PT) send request data package RP to node r.
Node r elapsed time PT handles the RP from node p and q, and stand-by period WT sends reply data bag AP (Answer Packet) and gives node p, and q, node p, q receive the reply data bag AP of node r, finish node r and node p, the communication handshake mechanism of q.
Node p, q is stand-by period 2WT respectively, and WT is sent to Centroid n with the reply data bag AP that receives, and so far node r is with node p, and q is that relaying and Centroid n obtain data communication again, node n finishes the route reconstruct to blind spot r.
Above node p, q are the detailed process of via node simultaneously, choose separately that one of them is similar to this for the sequential of via node, remove node p among Fig. 5 or the sequential of node q, and the corresponding modify stand-by period gets final product.The present invention has defined data processing time PT (Process Time) and stand-by period WT (Wait Time) for fear of the data collision that route reconstruct produces.The reception of packet and forwarding are carried out according to the sequential of setting.
The present invention is by the analysis and research to Automatic meter reading system network layer and MAC layer, after utilizing this ad hoc network structure of artificial spider web to make that networking is finished, the Centroid of subnet is responsible for the blind spot of subnet part is carried out heavy-route, need not carry out heavy-route to the whole nodes of network, save pathfinding by time, improve communication efficiency and reliability.
Claims (1)
1. local route reconstructing method in the low-voltage network power line carrier communication network, it is characterized in that: it is realized by following steps:
Data broadcasting is initiated in base station in step 1, the low-voltage network power line carrier communication network, m G node in the MAC layer of low-voltage network power line carrier communication network receives the data broadcasting of base station, and form the n straton net of m-1 limit individual layer spider web logical topology structure at the MAC layer, m is the integer greater than 1, n=1;
Step 2, in the n straton net of the described m-1 of step 1 limit individual layer spider web logical topology structure, select a node h
nAs Centroid, all the other any one nodes all can directly carry out data communication in the n straton net of described Centroid and individual layer spider web logical topology structure;
Step 3, Centroid h
nTo each the node assignment logic ID in the n straton net of m-1 limit individual layer spider web logical topology structure;
The Centroid h of step 4, n straton net
nInitiate data broadcasting once more;
K node receiving center node h in the MAC layer of step 5, low-voltage network power line carrier communication network
nThe data of broadcasting, all nodes that will obtain logic ID are then rejected, and k-m node of remainder formed n+1 straton net, and node of selection is as the Centroid h of this straton net in described n+1 straton net
N+1, described Centroid h
N+1All can directly carry out data communication with all the other any one nodes in the n+1 straton net, this Centroid h
N+1To each the node assignment logic ID in the n+1 straton net; Make n=n+1, m=k-m returns execution in step four, and remaining B node is searched for, and all realizes direct communication or trunking traffic with the base station until all nodes, finishes the foundation of communication network in the MAC layer of low-voltage network power line carrier communication network; K is the integer greater than m;
Step 6, upgrade channel circumstance, for every straton net: Centroid judges whether the data from each all mid-side node in this straton net received by logic ID, if judged result is for being then to finish the route reconstruct of this straton net; If judged result is that then this straton net need not carry out route reconstruct; Need the subnet of route reconstruct at each, execution in step seven and eight is carried out route reconstruct to this subnet;
Step 7, judge whether each all mid-side node that can not communicate by letter with the Centroid of this subnet in this straton net can communicate with the adjacent node of this week mid-side node in this straton net one by one, if the judged result of all mid-side nodes is for denying, then return step 1, carry out networking again; Otherwise, execution in step eight;
The Centroid of step 8, this straton net send instruction to each do not receive the adjacent node of all mid-side nodes in this straton net of data, initiation is to described route reconstruct broadcasting of not receiving each all mid-side node of data, set up and do not receive each all mid-side node of data and the handshake mechanism between the adjacent node of this week mid-side node in this straton net, and then realize trunking traffic between the Centroid of all mid-side nodes that all do not receive data and this straton net, and finish local route reconstruct to this straton net;
Step 9, after all straton nets are all finished local route reconstruct, realize local route reconstruct to Automatic meter reading system;
The G node for can be directly and the base station carry out the node of point-to-point communication;
The B node is that the influence that is subjected to channel status can not directly communicate with the base station, but can be adjacent the node that node communicates.
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Cited By (7)
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| CN102904609A (en) * | 2012-06-14 | 2013-01-30 | 中国科学技术大学 | Networking method for integrated power line carrier communication network and topology network |
| CN104640153A (en) * | 2015-01-16 | 2015-05-20 | 中国科学院上海微系统与信息技术研究所 | Routing reconfiguration method for wireless communication network resources in power transmission line monitoring |
| CN105391474A (en) * | 2015-10-30 | 2016-03-09 | 厦门中天微电子科技有限公司 | Power line carrier centralized meter reading system node belonging automatic confirmation method |
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| CN112968833A (en) * | 2021-04-20 | 2021-06-15 | 山东卓文信息科技有限公司 | Routing algorithm system based on novel low-voltage distribution network power line communication |
| CN113949413A (en) * | 2021-09-09 | 2022-01-18 | 广东电网有限责任公司电力调度控制中心 | Layered networking method for low-voltage power line carrier communication system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904609A (en) * | 2012-06-14 | 2013-01-30 | 中国科学技术大学 | Networking method for integrated power line carrier communication network and topology network |
| CN104539315B (en) * | 2014-12-02 | 2017-02-22 | 上海电器科学研究院 | Rapid networking method for power line carrier communication |
| CN104640153A (en) * | 2015-01-16 | 2015-05-20 | 中国科学院上海微系统与信息技术研究所 | Routing reconfiguration method for wireless communication network resources in power transmission line monitoring |
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| CN105391474A (en) * | 2015-10-30 | 2016-03-09 | 厦门中天微电子科技有限公司 | Power line carrier centralized meter reading system node belonging automatic confirmation method |
| CN105391474B (en) * | 2015-10-30 | 2017-12-19 | 厦门中天微电子科技有限公司 | A kind of power line carrier centralized meter-reading system node-home automatically confirms that method |
| CN109361541A (en) * | 2018-10-22 | 2019-02-19 | 河南科技大学 | Network topology structure and its construction method based on artificial spider web |
| CN109361541B (en) * | 2018-10-22 | 2021-05-25 | 河南科技大学 | Network topology structure based on artificial spider web and construction method thereof |
| CN112968833A (en) * | 2021-04-20 | 2021-06-15 | 山东卓文信息科技有限公司 | Routing algorithm system based on novel low-voltage distribution network power line communication |
| CN112968833B (en) * | 2021-04-20 | 2022-03-04 | 山东卓文信息科技有限公司 | Routing algorithm system based on low-voltage distribution network power line communication |
| CN113949413A (en) * | 2021-09-09 | 2022-01-18 | 广东电网有限责任公司电力调度控制中心 | Layered networking method for low-voltage power line carrier communication system |
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