CN112468187B - Ad-hoc network method of power line carrier communication equipment - Google Patents
Ad-hoc network method of power line carrier communication equipment Download PDFInfo
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- CN112468187B CN112468187B CN202011436000.8A CN202011436000A CN112468187B CN 112468187 B CN112468187 B CN 112468187B CN 202011436000 A CN202011436000 A CN 202011436000A CN 112468187 B CN112468187 B CN 112468187B
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
An ad hoc networking method of power line carrier communication equipment comprises the following steps: after each communication device is powered on, silent receiving is carried out to find out whether a network center device sends synchronous information; continuously sending the power-on information until receiving the information sent by other sites, comparing the power-on information with the power-on information, and promoting the network center equipment to form a network; a plurality of devices are powered on simultaneously, one device is required to be promoted to become a network center device in a period, the network center device sends synchronization information to the other devices, and the other devices start to enter an access process to be accessed into a current network to establish a local area network. The invention occupies system resources as little as possible during self-organizing network, realizes the generation of central equipment in the self-organizing network architecture with the fastest speed and the most convenient scheme, saves the networking time and improves the efficiency.
Description
Technical Field
The invention belongs to the technical field of power line carrier communication, and particularly relates to an ad hoc network method of power line carrier communication equipment.
Background
In the established network, the network central node sends synchronization information at regular time and sends beacon data to enable the device after being powered on to detect the existence of the device, so that the device can be accessed into the current network. If the network is not established currently (the mark is that the device after being powered on does not detect beacon data sent by the network center node within a period of time), the device itself becomes an independent network center node, starts to send a beacon to indicate that the device has established the local area network currently, and other devices can detect and then connect to the current network after being powered on. If a plurality of network devices are on-line simultaneously and a network is not established at present, each network device mutually sends resource information of the site, a device suitable for becoming a central node is jointly proposed according to different resource information of each device, and when the device becomes a network central node device, other devices are sequentially connected to the central node device to establish a local area network.
In the prior art, in the current state, if the channel quality is poor and the data transmission between two devices is unstable, if the device 1 does not search the synchronization information sent by the device 2 (the network central node device existing in the current network) in the boot cycle, and becomes a central node device alone, but there exists a network in the current network, at this time, if another network is formed, the data interaction of the devices in the network is disturbed, and if the device 3 is powered on at this time, the synchronization information sent by the two central nodes is received without knowing which network to join, which may cause network collision.
In the current solution, a neighborhood network is set for the network, and as described above, after the device 3 is powered on, the device can be arbitrarily added to one network center, and the two network centers have different network numbers, and if the device 3 receives data of another network, the device is selected not to be analyzed and directly discarded, which causes a larger amount of network redundancy that is busy originally, and the interactive data between the devices is more unstable.
When multiple devices are powered on simultaneously (device search period is not reached), and the current network is not networked. The network devices simultaneously send the power-on states of the network devices, when the device search period is reached, the number of the power-on devices received by the network devices is calculated, and whether the network devices can become the network center device or not is judged according to the information of each site. If the device becomes the network center device, the process is entered, otherwise, the network center device is waited to send the synchronous message to access the current network. The disadvantages of this solution are: if the number of devices powered on simultaneously in a period is too large, a single device needs to store a large amount of device data to ensure that a site is not forgotten, under such a condition, unnecessary time waste is caused when a network center device is pushed, resources in the device are also wasted at the same time, and redundancy of a system is increased.
Disclosure of Invention
The invention aims to provide an ad hoc network method of power line carrier communication equipment, which aims to solve the problems that in the prior art, network conflict is caused by disordered equipment data interaction in a network, unnecessary time waste is caused when a plurality of pieces of equipment are simultaneously powered on and network center equipment is pushed, resources in the equipment are also wasted, and the redundancy of a system is increased.
In order to achieve the purpose, the invention adopts the following technical scheme:
an ad hoc networking method of a power carrier communication device, comprising:
the power line carrier communication equipment is powered on, and silent receiving is carried out to find out whether the network center equipment sends the synchronous information;
if the power line carrier communication equipment receives synchronous information sent by other communication equipment sites, after the information is compared, the network center equipment is promoted to form a network;
if the power line carrier communication equipment does not receive the synchronous information sent by the sites of other communication equipment, the power line carrier communication equipment sends the own power-on information, and other equipment in the network judges whether the equipment can become new network center equipment or not after receiving the information.
Furthermore, a plurality of devices are powered on simultaneously, one device is promoted to become a network center device in a period, the network center device sends synchronization information to the other devices, and the other devices start to enter an access process to be accessed into the current network to establish a local area network.
Furthermore, when each device is powered on, each device is silenced for a period to find whether a network is established currently, and if the network is established currently, synchronization information sent by the network center device is received; if the information is not received in the period, carrying out the next operation and sending the own power-on information; and if the synchronous information is received, starting an interactive process with the network center equipment.
Further, after the last silent period is finished, the power line carrier communication device starts to broadcast and send its power-on information, which contains the capability information that it becomes the network center device, so that other devices in the network can judge whether they become a new network center device after receiving the information.
Further, the power line carrier communication device may be in a state of receiving the synchronization information sent by the other communication device station, and two conditions for terminating this step are as follows:
the power line carrier communication equipment receives the synchronization information sent by the network center equipment: after receiving the message, the station accesses the current network, and executes the network access process to become an equipment station in the network;
the power line carrier communication equipment receives the power-on information of other equipment: if the device receives the power-on information of other devices, the device represents that no local area network is generated in the current network, and the device and the other devices can form a local area network to jointly promote the network center device.
Further, the step of powering on the plurality of power carrier communication devices simultaneously specifically includes the following steps:
1) searching the power-on state sent by other equipment in the current network, and instantly updating and broadcasting the power-on state of the site;
2) determining whether the equipment can become a network center site or not according to the states of other equipment received by the equipment;
3) the referral device becomes a network centric device.
Further, when receiving the power-on states of other devices in 2), judging whether the device can become a network center station according to the data carried by the device, if the parameter of the device is compared with the received state, judging that the device can become the network center device, storing the station information of the device into a parameter table of the temporary center device for comparing the subsequent received states; after each comparison, whether the user can become the network center equipment or not, the parameters which can become the network center equipment are stored in the temporary center equipment parameter list.
Further, after the time period for sending the power-on state in step 3) is reached, if the parameters in the parameter table of the temporary central device are the parameters of the device, the device enters a state change process to make itself become the network central device, and sends the synchronization information at regular time to wait for other devices to access the network; if the parameter in the temporary central equipment parameter list is not the parameter of the equipment, the equipment continues to send the power-on state until the network central equipment sends the synchronous information, and the equipment is switched to an access process and accessed to the current network.
Further, the referral of the network center device is selected by the priority of the following scheme, the device with high priority becomes the network center device, and the selection priority is as follows:
specifying: the device designated as the hub device is always automatically selected as the hub device once;
device capabilities: without designation, the device's ability to act as a hub device is the highest criterion for ranking devices;
the number of discovered devices is: the number of other devices discovered by a device is the next important ranking criterion; the number of discovered devices represents the number of sites in the network with which the devices communicate directly, the device with the best visibility in the network being selected as the hub device;
the number of discovered networks is: the next important ranking criterion when the device finds other networks; the station which finds the most neighbor networks in the network has the maximum potential of coordinating with the neighbor networks and is selected as the network center equipment;
device ID number: each device has its own independent ID, and if the above items are all identical, the unique confirmation is performed by the item, and if the device ID is large, the device becomes a network center device.
Further, the self-networking system of the power carrier communication equipment comprises a power carrier communication equipment module, a synchronous information sending and judging module and a network center module; the power line carrier communication equipment module and the synchronous information sending and judging module are both connected to the network center module;
the synchronous information sending and judging module is used for judging whether a network exists in a search in a fixed period;
the network center module is used for sending the synchronous information at regular time.
Compared with the prior art, the invention has the following technical effects:
the invention integrates the equipment data in the network through a small amount of equipment information by receiving and searching the silence, electing the network center, establishing the local area network, judging whether the equipment itself is the central equipment in the network or not, so that the network architecture in the communication system of the self-organizing network architecture is as simple as possible, the waste of network resources and the reduction of the equivalent rate of network bandwidth caused by the excessively complex network are avoided, the network rate is further improved, the network structure is optimized, and the redundancy is reduced.
When the self-organizing network is constructed, each device is silenced for a period to find whether the network is established or not when being electrified, whether the interaction process with the network center device is started or not is judged by judging whether the power-on information is received or not in the period, the information contains the capability information of becoming the network center device, so that other devices in the network judge whether the devices become a new network center device or not after receiving the information, the system resources are occupied as little as possible, the generation of the center device in the self-organizing network framework is realized by the fastest speed and the most convenient scheme, the networking time is saved, and the efficiency is improved.
Drawings
FIG. 1 illustrates a device power-up step;
FIG. 2 is a schematic diagram of a powered device entering an established network.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
referring to fig. 1 and 2, after each device is powered on, when the synchronization information sent by the network center device is not received in a period, it is determined that no network is generated temporarily due to various reasons, and the device itself may not become the network center device, but waits for another device to access or receive a power-on state of the other device, and then compares the network center device with itself to promote the network center device, so as to form a network.
Step 1: after the equipment is powered on, silent receiving is carried out to find whether the network center equipment sends the synchronous information.
When each device is powered on, the device is silenced for a period to find whether a network is established currently or not, and if the network is established currently, synchronization information sent by the network center device can be received. And if the information is not received in the period, performing the operation of the step two and sending the power-on information of the user. And if the synchronous information is received, starting an interactive process with the network center equipment.
Step 2: and continuously transmitting the power-on information until receiving the information transmitted by other stations.
After the last silent period is finished, the equipment starts to broadcast and send own power-on information, wherein the information contains the capability information of the equipment which becomes the network center equipment, so that other equipment in the network can judge whether the equipment becomes a new network center equipment or not after receiving the information. In this time period, the device does not become a network center device alone, so as to prevent the device from not receiving the synchronization information sent by the network center device in time under the condition of poor network conditions.
The device is in this state continuously present, and the two conditions for terminating this step are as follows:
the equipment receives the synchronization information sent by the network center equipment: after receiving the message, the station accesses the current network, executes the network access process, and becomes an equipment station in the network.
The equipment receives the power-on information of other equipment: if the device receives the power-on information of other devices, the device represents that no local area network is generated in the current network, and the device and the other devices can form a local area network to jointly promote the network center device.
The steps are that the network center is promoted through silent receiving and searching, the local area network is established, the equipment data in the network is integrated through a small amount of equipment information, whether the equipment itself is the central equipment in the network is judged, the waste of network resources and the reduction of the equivalent rate of network bandwidth caused by the fact that the network is too complex are avoided, the network rate is further improved, the network structure is optimized, and the redundancy is reduced.
If a plurality of devices are powered on simultaneously, one device needs to be promoted to become a network center device in a certain period, the center network sends synchronization information to the other devices, and the other devices start to enter an access process to be accessed into the current network to establish a local area network. The referral of the network center device can be selected by the following priority, the device with the higher priority can become the network center device, and the selection priority is as follows:
user designation: a device that is designated by the user as a hub device is always automatically selected as the hub device.
Device capabilities: the ability of a device to act as a hub device without user specification is the highest criterion for ranking devices.
The number of discovered devices is: the number of other devices discovered by a device is the next important ranking criterion. The number of discovered devices represents the number of sites in the network with which the devices can communicate directly (i.e., without the need for a proxy site), thus allowing the device with the best visibility in the network to be selected as the hub device.
The number of discovered networks is: the next important ranking criterion is the number of other networks discovered by the device. The stations in the network that find the most neighboring networks have the greatest potential to coordinate with these neighboring networks and therefore may choose to become the hub device.
Device ID number: each device has its own independent ID, if the above items are identical, the unique confirmation can be carried out by the item, if the ID of the device is large, the device can become the network center device. This option can be used to decide the central device of the network in case of equal conditions.
Step 1: and searching the power-on state sent by other equipment in the current network, and instantly updating and broadcasting the power-on state of the site.
When the network state of the device is broadcasted, the states of user specification, device capability and the like in the priority are determined before the device is started, but the number of discovered devices and the number of discovered networks are determined after searching, so that the data states need to be updated immediately according to the current network state.
Step 2: and determining whether the device can become the network center site according to the states of other devices received by the device.
When receiving the power-on states of other devices, the device can judge whether the device can become a network center station according to the data carried by the device, and if the parameter of the device is compared with the received state, the device judges that the device can become the network center device, the device stores the station information of the device into a parameter table of the temporary center device for comparison of the subsequently received state. After each comparison, whether the user can become the network center equipment or not, the parameters which can become the network center equipment are stored in the temporary center equipment parameter list.
And step 3: and (4) promoting the proper equipment to be network center equipment.
When the self-organizing network is constructed, each device is firstly silenced for a period to find whether the network is established or not when being electrified, whether the interaction process with the network center device is started or not is judged by whether the electrifying information is received in the period, the information comprises the capability information of the device which becomes the network center device, so that other devices in the network can judge whether the device becomes a new network center device or not after receiving the information, the system resources are occupied as little as possible, the generation of the center device in the self-organizing network framework is realized by the fastest speed and the most convenient scheme, the networking time is saved, and the efficiency is improved.
After the time period of sending the power-on state is reached, if the parameters in the parameter list of the temporary central equipment are the parameters of the equipment, the equipment enters a state change process to enable the equipment to become network central equipment, and sends synchronous information at regular time to wait for other equipment to be accessed into the network. If the parameter in the temporary central equipment parameter list is not the parameter of the equipment, the equipment continues to send the power-on state until the network central equipment sends the synchronous information, and the equipment is switched to an access process and accessed to the current network.
Claims (6)
1. An ad hoc network method of a power line carrier communication device, comprising:
the power line carrier communication equipment is powered on, and silent receiving is carried out to find out whether the network center equipment sends the synchronous information;
when each power carrier communication device is powered on, the power carrier communication device is silenced for a period to find whether a network is established currently or not, if the network is established currently, synchronization information sent by network center equipment can be received, and an interaction process with the network center equipment is started; if the information is not received in the period, the power-on information of the user is sent;
the power-on information comprises the capability information of the equipment which becomes the network center equipment, so that other equipment in the network can judge whether the equipment becomes a new network center equipment after receiving the information;
the state that the power line carrier communication device sends the power-on information of the power line carrier communication device is continuously existed, and two conditions for terminating the state are respectively as follows:
under a first condition, the power line carrier communication device receives synchronization information sent by the network center device: after receiving the message, the power line carrier communication equipment executes a network access process, accesses the current network and becomes an equipment site in the network;
and secondly, the power carrier communication equipment receives power-on information of other equipment: if the power-on information of other equipment is received, the power carrier communication equipment and the other equipment form a local area network to jointly promote the network center equipment, which means that no local area network is generated in the current network.
2. The ad hoc network method of a power line carrier communication device as claimed in claim 1, wherein when a plurality of power line carrier communication devices are powered on simultaneously, a device is elected to become a network center device in a certain period, the network center device sends synchronization information to the other devices, and the other devices start to enter an access process to access the current network to establish a local area network.
3. The ad hoc network method of claim 2, wherein when a plurality of power carrier communication devices are powered on simultaneously, the step of electing one device to become a network center device within a certain period specifically comprises the steps of:
1) searching power-on information sent by other equipment in the current network, and instantly updating and broadcasting power-on information of a site of the user;
2) determining whether the power carrier communication equipment can become network center equipment or not according to the power-on information of other equipment received by the power carrier communication equipment;
3) and (4) promoting the proper equipment to become the network center equipment.
4. The ad hoc network method of claim 3, wherein in 2) when receiving the power-on information of other devices, judge whether it will become the central device of the network according to the data carried by it, if judge that it will become the central device of the network after parameter of this apparatus and received power-on information compare, keep the station information of oneself in the parameter table of the temporary central device, for with the subsequent received power-on information is compared; after each comparison, no matter whether the device becomes the network center device or not, other device parameters which can become the network center device are stored in the temporary center device parameter list.
5. The ad hoc network method of power line carrier communication equipment as claimed in claim 4, wherein in 3), after the time period for sending the power-on information arrives, if the parameter in the parameter table of the temporary central equipment is the parameter of the equipment, the equipment enters the state change process to make itself become the network central equipment, and sends the synchronous information at regular time to wait for other equipment to access the network; if the parameter in the temporary central equipment parameter list is not the parameter of the equipment, the equipment continues to send the power-on information until the network central equipment sends the synchronous information, and the equipment is switched to an access process and accessed to the current network.
6. The ad hoc network method of claim 2, wherein the referral of the hub device is selected according to the following priority of parameters, the device with higher priority becomes the hub device, and the selection priority is as follows:
specifying: the device designated as the hub device is always automatically selected as the hub device once;
device capabilities: without designation, the device's ability to act as a hub device is the highest priority ranking the devices;
the number of discovered devices is: the number of discovered devices represents the number of sites in the network, the devices directly communicate with the discovered devices, and the device with the best visibility in the network is selected as the network center device;
the number of discovered networks is: the station which finds the most neighbor networks in the network has the maximum potential of coordinating with the neighbor networks and is selected as the network center equipment;
device ID number: each device has its own independent ID, and if the above items are all identical, the unique confirmation is performed by the item, and if the device ID is large, the device becomes a network center device.
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| CN106452507B (en) * | 2016-12-07 | 2017-12-26 | 南京万形电气有限公司 | A kind of self-healing ad hoc network method based on OFDM power line carrier communications |
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