CN104080196A - Ultra-short wave remote data transmission system of hybrid topology network and transmission method thereof - Google Patents
Ultra-short wave remote data transmission system of hybrid topology network and transmission method thereof Download PDFInfo
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- CN104080196A CN104080196A CN201310103282.3A CN201310103282A CN104080196A CN 104080196 A CN104080196 A CN 104080196A CN 201310103282 A CN201310103282 A CN 201310103282A CN 104080196 A CN104080196 A CN 104080196A
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Abstract
The invention discloses an ultra-short wave remote data transmission system of a hybrid topology network, which comprises at least one master station equipment and a plurality of slave station equipment, wherein data transmission between the master station equipment and the slave station equipment is implemented with radio wave as a channel media; a signal coverage area of the master station equipment is a master-slave type core network area, a distributed edge network area is arranged outside the signal coverage area of the master station equipment, and at least one slave station equipment in the slave station equipment is positioned in the core network area; at least one slave station equipment in the core network area is a relay station. The data transmission between the slave station equipment in the edge network area and the master station equipment is implemented through the relay station. According to the ultra-short wave remote data transmission system, by adopting a new communication mode on a single power frequency point and intruding a route tree access technology of the edge network, the defect of insufficient signal coverage of few slave stations in the edge network area is solved at low cost. The invention further discloses a transmission method of the ultra-short wave remote data transmission system of the hybrid topology network.
Description
Technical field
The invention belongs to automatic control and management Wireless Data Transmission networking technology field, relate in particular to a kind of mixed topology network ultra-short wave remote data transmission system and transmission method thereof.
Background technology
SCADA (Supervisory Control And Data Acquisition) system, be data acquisition and supervisor control, to take computer as basic scattered control system (DCS, distributed control systems) and Automatic monitoring systems.SCADA system comprises main website equipment and a plurality of from station equipment.Main website equipment and each are from directly communicating by Ethernet or wireless network between station equipment.Main website equipment is collected the business datum from station equipment, thereby the working condition from station equipment is monitored.SCADA system applies field is very wide, can be applied to the data acquisition and supervision control and process control etc. in the fields such as electric power, metallurgy, oil, chemical industry.SCADA system accounts for critical role in telecontrol system, can carry out monitoring and controlling to on-the-spot operational outfit, to realize the various functions such as data acquisition, equipment control, measurement, parameter adjusting and various types of signal warning.At present, the SCADA system of the industries such as electric power, waterpower, oil is generally used 230M duplex frequency and the single power frequency point that State Radio Regulatory Commission distributes to carry out wireless communication network, and its transfer of data is real-time, accurate, safety.But along with quantity being installed from station equipment (terminal) in SCADA system, day by day increase, the access problem of the edge termination from main website equipment away from becomes day by day serious.
Specifically, in traditional master-slave mode ultrashort wave SCADA system, affected by wave radiation propagation characteristic, system communication overlay area be take the circular geographic area that central master station is the center of circle often.And in practical application, the SCADA system coverage area that the administrative division of take is principle of subsidiarity is often also non-circular, from the position distribution of station equipment, there is very large randomness, distant from station equipment from main website equipment having, within the coverage of Yi Bu main website equipment, thereby there is the problem that cannot cover all edge terminations.In this case, if more central master station is set in order to meet all edge terminations of covering, each central master station adopt different communication frequencys with separately from station equipment, carry out communication, caused taking too much frequency resource, newly-built central master station will be subject to the restriction of available frequency resources.On the other hand, if the slave station negligible amounts in edge network region, the cost of building central master station is higher, thus for the cost performance of minority slave station construction central master station on the low side.
Summary of the invention
The present invention has overcome and in prior art, exists edge network region slave station device signal spreadability not enough and for defects such as edge network region slave station equipment construction central station cost performance are on the low side, has proposed a kind of mixed topology network remote ultrashort wave transmission system and transmission method thereof.
The present invention proposes a kind of mixed topology network ultra-short wave remote data transmission system, comprise at least one main website equipment and a plurality of from station equipment; Described main website equipment and describedly include wireless signal transmitting device and wireless signal receiver from station equipment, described main website equipment and describedly realize transfer of data from take radio wave between station equipment as channel medium;
The signal coverage areas of described main website equipment is core network region, is edge network region beyond the signal coverage areas of described main website equipment, and described a plurality ofly have at least one from station equipment, to be arranged in described core network region from station equipment;
At least one in described core network region is relay station from station equipment, when described main website equipment send in described edge network region from station equipment call measurement information together time, described relay station is identified this and is called measurement information together, and according to routing table by this call together measurement information send in corresponding edge network region from station equipment, according to described routing table, this website business datum is sent to described relay station and is preserved from station equipment in described edge network region, and by described relay station, business datum is sent to described main website equipment.
Wherein, described main website equipment send in described core network region from station equipment call measurement information together time, in described core network region, from station equipment, directly to described main website equipment, send this website business datum.
Wherein, in described main website equipment and described core network region, from station equipment, adopt tdma to realize main website device polling, from station equipment timesharing feedback business datum.
Wherein, in described main website equipment and described core network region, from station equipment, adopt identical networking to realize transfer of data.
Wherein, described routing table is the topology information from the self-organizing network between station equipment in described relay station and described edge network region, and described routing table is stored in advance in also dynamically updating in real time from station equipment in described relay station and described edge network region.
Wherein, in described edge network region, between station equipment and described relay station, utilize channeling technology or ISM band channel, to transmit data.
Wherein, described edge network region carries out transfer of data from configuring CSMA/CA agreement between station equipment and described relay station.
The invention allows for a kind of transmission method of mixed topology network ultra-short wave remote data transmission system, described system comprises at least one main website equipment and a plurality of from station equipment, the signal coverage areas of described main website equipment is core network region, be edge network region beyond the signal coverage areas of described main website equipment, described a plurality ofly have at least one from station equipment, to be arranged in described core network region from station equipment; Said method comprising the steps of:
Step 1: described main website equipment is allly surveyed that signal was dispensed to time slot by the time and sends from station equipment to all with the official hour cycle from calling together of station equipment mailing to;
Step 2: if described from station equipment described core network region, from station equipment according to described time slot receiving call in described core network region surveyed signal and timesharing sends corresponding business datum to described main website equipment; If described from station equipment described edge network region, described in described relay station identification, call survey signal together, and the described survey signal of calling together is sent to accordingly from station equipment by channeling or ISM band according to pre-stored routing table, describedly from station equipment, according to described routing table, corresponding business datum is sent to described relay station and is preserved, by the business datum of our station business datum and preservation, according to time slot, unification is sent to described main website equipment to described relay station;
Step 3: described main website equipment receives all business datums, carries out, after Verification & Validation, completing transfer of data.
Wherein, further comprise: signal employing Frame serial number is surveyed in calling together that described main website equipment sends, from station equipment according to described numbering judging whether miss in described core network region and edge network region called survey signal together, if described slave station device discovery is missed and uploaded time slot in competition and submit to and retransmit application to described main website equipment.
Wherein, the mode that sends business datum from station equipment to described main website equipment in the region of edge network described in step 2 can also be: described edge network region from station equipment, thresholding is set constantly, describedly from station equipment, at thresholding, constantly, according to described routing table active, business datum is sent to described relay station, when described relay station receives calling together of described main website equipment and surveys signal, by the business datum of our station business datum and preservation, according to time slot, unification is sent to described main website equipment to described relay station.
Realizing and connecting from station equipment employing wireless self-organization network in edge network of the present invention region.Wireless self-organization network is comprised of one group of autonomous wireless terminal, does not need the support of fixing infrastructure and the communication network realized, is a kind of each node self-forming, self-organizing, the network of management certainly.In edge network of the present invention region, from the topological structure of station equipment and relay station, there is the dynamic of height, take the distributed control of communication mode and the network of multi-hop between node.
The present invention utilizes kernel tree route access technology, and low cost has solved the problem that in traditional master-slave network, edge network area part slave station cannot be capped.
The present invention calls together and surveys the message causing with data from station equipment FM reception edge network and miss for the main website equipment that may occur, adopts successive frame method for numbering serial to miss identification.If miss and upload time slot submission repeating transmission application from station equipment and in appointment competition, realize the integrality of transfer of data.
Accompanying drawing explanation
Fig. 1 is the structure chart of mixed topology network ultra-short wave remote data transmission system of the present invention.
Fig. 2 is the schematic diagram of tree structure routing table.
Fig. 3 is the flow chart of the transmission method of mixed topology network ultra-short wave remote data transmission system of the present invention.
The frame structure schematic diagram of Tu4Shi main website equipment transmitted signal.
Embodiment
In conjunction with following specific embodiments and the drawings, the present invention is described in further detail.Implement process of the present invention, condition, experimental technique etc., except the content of mentioning specially below, be universal knowledege and the common practise of this area, the present invention is not particularly limited content.
As shown in Figure 1, mixed topology network ultra-short wave remote data transmission system of the present invention, comprises at least one main website equipment and a plurality of from station equipment.The signal coverage areas of main website equipment is core network region, and the region outside its coverage is edge network region.Data transmission system in the present invention is to take radio wave as transmission medium, main website equipment with from station equipment, include wireless signal transmitting device and wireless signal receiver, with ultrashort wave radio station realize main website equipment with from communicating by letter between station equipment.
In core network region, main website equipment is connected with a plurality of slave station devices communicatings, and it is 10 that each main website equipment has direct-connected slave station number of devices
2～10
3magnitude.In the present invention, because ultra-short wave radio transmission range is limited, in 20-30 kilometer range, the single-frequency frequency in core network region should adopt the special-purpose dominant frequency of the ownership industry conventionally.Because each relevant industries can be few and discrete with frequency, frequency resource is nervous, for guaranteeing the more eurypalynous business of transmission rate support of capturing service, in core network region in the present invention, main website equipment is communicated by letter with adopt the mode of identical networking from station equipment, and adopt tdma (TDMA, Time Division Multiple Access) by mailing to each, from the data of station equipment, carry out time division and transmit at a frequency, from station equipment, when monitoring this frequency point data, receiving the data in the corresponding moment separately and just can obtain corresponding data.Particularly, thus main website equipment adopts timeslice from calling together of station equipment, to survey signal and carry out mark and form a time slot (TS, time slot) being sent to each, all time slots is arranged in order and forms tdma frame data, as shown in Figure 4.Main website data are pressed these frame data the certain hour cycle (for example, 10 minutes) and on a frequency, are transmitted this tdma frame data, the signal at this frequency of monitoring from station equipment in core network region.When reach from station equipment time slot time, from station equipment, receive and this frequency, call accordingly survey signal together.From station equipment, according to calling survey signal together, the business datum of self is sent to main website equipment according to corresponding time slot, main website equipment receives and realizes monitoring.By said process main website equipment, in one-period, in chronological sequence to each from station equipment, send to call together successively and survey signal and receive corresponding business datum, thereby realize the communication mode of main website poll, slave station timesharing use, and only utilize a frequency to take quantity with the communication frequency reducing in business great Qu and while depositing a plurality of base station, alleviate the present situation of private network frequency resource anxiety.Further, also disassemble existing duplexing frequency in core network of the present invention region is that two half-duplex frequencies are realized communication, to promote efficiency of frequency employment, and reduces from the station equipment configuration of receiving and sending messages.
Due to the propagating characteristic of electromagnetic signal, the signal cover of main website equipment is generally a border circular areas.And due to the randomness in geographic factor and uncertainty, the address of communication node distributes and is scrambling feature.The part edge network area not yet covering for the signal of main website equipment, if disperseed and negligible amounts from station equipment in this edge network region, can utilize part in the main website device signal area of coverage (being core network region) from station equipment as relay station, by the data relay of the in the future autonomous station equipment of this relay station be transmitted in above-mentioned edge network region from station equipment.Meanwhile, main website receives and the business datum from station equipment of monitoring from above-mentioned edge network region by this relay station.
Edge network region memory is some from station equipment, and the quantity from station equipment in edge network region is several to the dozens of order of magnitude.Relay station in edge network region with from station equipment, adopt wireless self-organization network to be connected.Wireless self-organization network is divided into planar structure and hierarchy.The present invention adopts the wireless self-organization network of hierarchy in edge network region.The wireless self-organization network of hierarchy is divided into a plurality of bunches by wireless network, and each bunch is by a cluster head and a plurality of bunches of member compositions, and wherein cluster head is relay station, bunch member be by relaying from station equipment.At the self-organizing network Routing Protocol for based on topological, from the strategy of route discovery, can be divided into and first answer formula route, route and mix route as required.In the present invention, adopted a kind of hybrid-type kernel tree Routing Protocol, can be in wireless network environment Route establishment is provided fast, maintains dynamic routing protocol for user.Kernel tree Routing Protocol comprises self-organization of network and the large basic function of dynamic routing two.Kernel tree Routing Protocol is that a kind of two-tier network architecture is combined closely, the wireless self-organization network dynamic routing algorithm based on kernel tree agreement.Kernel tree agreement is compared with complete reciprocity wireless self-organization network, and networking and routing cost reduce, and have expanded range of application.According to the present invention in the environmental condition of institute's foundation and edge network region from the quantity of station equipment, at edge network intra-zone, adopt and first answer formula routing Design, each is pre-stored and safeguard the tree structure routing table of one or more storage routing iinformations from station equipment, embody slave station up-to-date routing iinformation in all edges in network, as shown in Figure 2.The present invention utilizes the kernel tree Routing Protocol can the tree-like roadbed topological structure of active maintenance, has effectively avoided the route break being caused by route loop.
From station equipment, when communicating by letter, can directly search tree structure routing table, not need route discovery, have advantages of that the grouping of transmission time delay is little.The tree structure routing table generating be stored in relay station and by relaying from station equipment and dynamically updated.Due in the present invention, each is relatively fixing from the position of station equipment, and the topological structure in edge network region is difficult for changing, so the relative renewal frequency of routing table information is not frequent, and taking of relative routing expense and the network bandwidth is less.Relay station with from station equipment, according to routing table, realize transfer of data.Comparatively speaking, relatively simple by the function from station equipment of relaying, substantially do not need maintaining routing list, relay station function relative complex, relay station not only need to safeguard with by relaying from the routing table between station equipment, also need to safeguard from station equipment and bunch relation.
The traffic carrying capacity in edge network region, radio station power have obvious reduction compared with main website equipment, so frequency is selected more flexible.Can in single power frequency point cellular re-use mode, improve frequency utilization ratio by different geographical; When if between private network frequency insufficient total amount or region there is performance difficulty in close together, frequency cellular re-use method, each from also can the selected frequency close ISM band of station equipment as communication frequency.Each works in peer-to-peer network mode from station equipment, completes convergence report with tree structure.
As shown in Figure 3, the transmission method of mixed topology network ultra-short wave remote data transmission system of the present invention comprises the following steps:
Step 1: main website equipment adopts timeslice to survey signal from calling together of station equipment and form time slot by time mark being sent to each, and be arranged in order and generate frame data and send from station equipment to all;
Step 2: if from station equipment core network region, receiving and to call accordingly survey signal together according to time slot from station equipment in core network region, and send corresponding business datum to main website equipment according to this time slot timesharing; If from station equipment edge network region, calling together in relay station identification current time slots survey signal be its relaying from station equipment, relay station will be called survey signal together and will be sent to accordingly from station equipment by channeling or ISM band according to routing table, this is sent to this website business datum relay station and preserves from station equipment accordingly, and by the business datum from station equipment of its relaying of our station business datum and preservation, according to time slot, unification is sent to main website equipment to relay station.
Wherein, there are two operating frequencies in each relay station, one of them operating frequency is the primary frequency in the core network region of relay station monitoring, main website equipment sends and to call survey signal together with tdma on this primary frequency, and relay station monitors on this primary frequency that main website equipment sends, calls survey signal together; The special-purpose frequency that another operating frequency adopts while being each slave station devices communicating in relay station and edge network region, i.e. above-mentioned ISM frequency or cellular re-use frequency.Owing to not adopting tdma in edge network region, from transmitting data between station equipment, easily bump, cause relay station cannot intactly receive from each business datum from station equipment.So the present invention adopts CSMA/CA class competition employment mechanism to upload business datum in the frequency of edge network, avoids channel resource to use collision.
Step 3: main website equipment receives all business datums, completes after Verification & Validation, completes transfer of data.
Present device is used simplex station, in relay station and edge network region, do not wait for during slave station devices communicating in the case on the primary frequency using at main website equipment, therefore likely can miss from main website, issue self or by the information from station equipment of relaying.For this problem, in the present invention, main website equipment sends calls together and surveys signal and adopt Frame serial number, and from station equipment according to numbering whether continuously judging whether miss in core network region and edge network region called survey signal together.If certain frame data is numbered when discontinuous, show to have occurred to miss some data, from station equipment, in competition, upload time slot and submit to and retransmit application to main website equipment.
If in main website equipment temporary needs system during certain business datum from station equipment, main website equipment sends this from station equipment and calls survey signal together from station equipment to all temporarily.If should be positioned at the direct coverage of main website from station equipment, this slave station directly responds to call together to survey and requires and upload this website business datum; If this slave station is positioned at certain edge network region, whether corresponding relay station can identify and to be measuredly from station equipment, be positioned at the edge network of relay services region is provided self, and to the slave station device forwards to be measured in edge network region, calls measurement information by trunking mechanism together.In edge network region, accordingly from station equipment receives request, according to pre-stored routing table, this website business datum is sent to relay station, and be forwarded to main website equipment by relay station, after main website completes verification and confirms, communication completes.
In the transmission method of mixed topology network ultra-short wave remote data transmission system of the present invention, edge network region is sent to business datum in relay station receiving to call together surveying signal from station equipment.In addition, edge network region from station equipment, take booking-mechanism thresholding to be set constantly (for example, every 5 minutes), from station equipment, at thresholding, constantly, according to routing table, on one's own initiative business datum is sent in relay station and is preserved, when calling together of relay station reception main website equipment surveyed signal, by the business datum of our station business datum and preservation, according to time slot, unification is sent to main website equipment to relay station.
Protection content of the present invention is not limited to above embodiment.Do not deviating under the spirit and scope of inventive concept, variation and advantage that those skilled in the art can expect are all included in the present invention, and take appending claims as protection range.
Claims (10)
1. a mixed topology network ultra-short wave remote data transmission system, is characterized in that, comprises at least one main website equipment and a plurality of from station equipment; Described main website equipment and describedly include wireless signal transmitting device and wireless signal receiver from station equipment, described main website equipment and describedly realize transfer of data from take radio wave between station equipment as channel medium;
The signal coverage areas of described main website equipment is core network region, is edge network region beyond the signal coverage areas of described main website equipment, and described a plurality ofly have at least one from station equipment, to be arranged in described core network region from station equipment;
At least one in described core network region is relay station from station equipment, when described main website equipment send in described edge network region from station equipment call measurement information together time, described relay station is identified this and is called measurement information together, and according to routing table by this call together measurement information send in corresponding edge network region from station equipment, according to described routing table, this website business datum is sent to described relay station and is preserved from station equipment in described edge network region, and by described relay station, business datum is sent to described main website equipment.
2. mixed topology network ultra-short wave remote data transmission system as claimed in claim 1, it is characterized in that, described main website equipment send in described core network region from station equipment call measurement information together time, in described core network region, from station equipment, directly to described main website equipment, send this website business datum.
3. mixed topology network ultra-short wave remote data transmission system as claimed in claim 2, it is characterized in that, in described main website equipment and described core network region, from station equipment, adopt tdma to realize main website device polling, from station equipment timesharing feedback business datum.
4. mixed topology network ultra-short wave remote data transmission system as claimed in claim 2, is characterized in that, in described main website equipment and described core network region, from station equipment, adopts identical networking to realize transfer of data.
5. mixed topology network ultra-short wave remote data transmission system as claimed in claim 1, it is characterized in that, described routing table is the topology information from the self-organizing network between station equipment in described relay station and described edge network region, and described routing table is stored in advance in also dynamically updating in real time from station equipment in described relay station and described edge network region.
6. mixed topology network ultra-short wave remote data transmission system as claimed in claim 5, is characterized in that, in described edge network region, between station equipment and described relay station, utilizes channeling technology or ISM band channel, to transmit data.
7. mixed topology network ultra-short wave remote data transmission system as claimed in claim 6, is characterized in that, described edge network region from configuring CSMA/CA agreement between station equipment and described relay station, carry out transfer of data.
8. the transmission method of a mixed topology network ultra-short wave remote data transmission system, described system comprises at least one main website equipment and a plurality of from station equipment, the signal coverage areas of described main website equipment is core network region, be edge network region beyond the signal coverage areas of described main website equipment, described a plurality ofly have at least one from station equipment, to be arranged in described core network region from station equipment; It is characterized in that, said method comprising the steps of:
Step 1: described main website equipment is allly surveyed that signal was dispensed to time slot by the time and sends from station equipment to all with the official hour cycle from calling together of station equipment mailing to;
Step 2: if described from station equipment described core network region, from station equipment according to described time slot receiving call in described core network region surveyed signal and timesharing sends corresponding business datum to described main website equipment; If described from station equipment described edge network region, described in described relay station identification, call survey signal together, and the described survey signal of calling together is sent to accordingly from station equipment by channeling or ISM band according to pre-stored routing table, describedly from station equipment, according to described routing table, corresponding business datum is sent to described relay station and is preserved, by the business datum of our station business datum and preservation, according to time slot, unification is sent to described main website equipment to described relay station;
Step 3: described main website equipment receives all business datums, carries out, after Verification & Validation, completing transfer of data.
9. the transmission method of mixed topology network ultra-short wave remote data transmission system as claimed in claim 8, it is characterized in that, further comprise: signal employing Frame serial number is surveyed in calling together that described main website equipment sends, from station equipment according to described numbering judging whether miss in described core network region and edge network region called survey signal together, if described slave station device discovery is missed and uploaded time slot in competition and submit to and retransmit application to described main website equipment.
10. the transmission method of mixed topology network ultra-short wave remote data transmission system as claimed in claim 8, it is characterized in that, the mode that sends business datum from station equipment to described main website equipment in the region of edge network described in step 2 can also be: described edge network region from station equipment, thresholding is set constantly, describedly from station equipment, at thresholding, constantly, according to described routing table active, business datum is sent to described relay station, when described relay station receives calling together of described main website equipment and surveys signal, by the business datum of our station business datum and preservation, according to time slot, unification is sent to described main website equipment to described relay station.
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