CN105262687A - Networking communication method of electricity consumption information acquisition system based on WIA-PA technology - Google Patents
Networking communication method of electricity consumption information acquisition system based on WIA-PA technology Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention relates to a networking communication method of an electricity consumption information acquisition system based on WIA-PA technology, belonging to the technical field of electricity consumption information acquisition. The method comprises the following steps that: S1, a gateway device assign corresponding IPv6 address for the whole electricity consumption information acquisition network according to device type of each node; S2, in combination with a networking method of the WIA-PA technology and a communication architecture of the electricity consumption information acquisition network, a backbone network and corresponding sub-networks, supporting IPv6 message transmission, of the electricity information acquisition system are established; S3, the gateway device realizes acquisition of electricity consumption information of users through the established electricity consumption information acquisition network. By the method, the WIA-PA network with IPv6 message transmission capability and the electricity consumption information acquisition system are effectively combined together, IPv6 address property of user nodes in wireless meter reading is realized, meanwhile, by a hierarchical routing search strategy, data acquisition success rate of a wireless network in the electricity consumption acquisition system is improved, problems, such as communication delay, are solved, and application demonstration of domestic industrial wireless WIA-PA standard in the filed of electricity consumption information field is promoted.
Description
Technical field
The invention belongs to power information acquisition technique field, relate to a kind of power information acquisition system group-net communication method based on WIA-PA technology.
Background technology
Existing power information acquisition system, comprises main website, substation, intelligent electric meter and the communication network between them.Wherein substation mainly comprises concentrator and collector.In hierarchical system network, local network (LAN) connects intelligent electric meter and concentrator, and concentrator is then connected with main website by wide area network (WAN).Main website is undertaken concentrating deployment by province or a certain area usually, and main station system communicates with concentrator and obtains intelligent electric meter acquisition tasks, the gatherer process of concentrator image data.In this process, the communication of concentrator uplink and downlink all needs the application program in concentrator to resolve the special stipulations of electric power.The common communication mode of wide area network is power optical fiber private network or 2G/3G public communication network.The communication mode that wherein local network is common is based on the bus communication of wired connection, low-voltage power line communication (PLC) and micropower radio frequency network etc.Compared with the cable technology such as fieldbus, the application of industry wireless network can reduce field wiring cost and installation and maintenance expense significantly, and the features such as its antijamming capability is strong, low-power consumption, real time communication are comparatively specific to other wireless technology.The industry wireless network WIA-PA standard such as proposed by mechanisms such as Shenyang Inst of Automation, Chinese Academy of Sciences, Beijing University of Science & Technology, Zhejiang University, Chongqing Mail and Telephones Unvi.The industry wireless network that this standard controls as process and monitoring automation, WIA-PA technology is applied to current power information and gathers field, for series of problems such as the real-time, reliability and the anti-interferences that solve in industry wireless network, there is crucial effect.
Meanwhile, embed the inexorable trend that IPv6 technology is Internet of Things development in smart machine, be also the tight demand in market simultaneously.If introduce IPv6 technology in WIA-PA network, can realize being interconnected between WIA-PA network and the Internet, numerous for solving number of nodes, the problem of address administration difficulty provides theoretical foundation.For the Internet, its existing various technology and ripe application directly can be extended to WIA-PA network; For WIA-PA network, by information sensing equipment, according to the agreement of agreement, all grid equipments and the Internet are coupled together, carries out information interaction and communicate, to realize Intellectualized monitoring and the management of grid equipment.But, in the face of the power information collection network of substantial amounts, how industrial wireless WIA-PA technology is combined with power information acquisition system, by the technology such as radio sensing network networking, node networking, address assignment based on WIA-PA, realize one in wireless telecommunications on the net based on the power information acquisition system communication network of WIA-PA technology, and the effective relevant difficult problem solved in existing kilowatt meter reading-out system, be the problem needing solution at present badly.
Through finding existing literature search, Chinese Patent Application No. is: 201410495837.8, name is called: a kind of power information acquisition system based on IPv6 and method thereof, this method propose a kind of intelligent acquisition router with the function such as route, exchange based on IPv6 newly and replace existing concentrator.This equipment builds one and supports IPv6 standardized collection capacity end to end survey grid network between intelligent electric meter and collection main website.It is from the basic communication principle outlining the power information acquisition system with IPv6 network substantially, and for device address allocation strategy, there is not relevant relating to the aspects such as algorithm network routing.Chinese Patent Application No. is: 201210518304.8, name is called: a kind of light wireless networking communications system and method thereof being applicable to power information collection, this invention utilizes light wireless networking to communicate, wireless base station is separated into Base Band Unit and radio frequency unit, realize wireless signal to zoom out, substantially increase the efficiency of transmission of data message in power distribution network, but due to equipment cost factor, this technology is with inapplicable in electrical network.Chinese Patent Application No. is: 201410076180.1, name is called: wireless power information gathers the network-building method of MANET, the method achieve nodes power on after the large-scale tree-like electricity consumption collection network of fast assembling, and efficiently solve network local interference problem in conjunction with corresponding frequency modulation technology, but for wireless electricity consumption collection network, if intermediate node breaks down in the tree network built, descendant node will certainly be caused to be affected.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of power information acquisition system group-net communication method based on WIA-PA technology, the method, by conjunction with IPv6 and the technology such as radio sensing network networking, node networking, address assignment based on WIA-PA, realizes one has IPv6 message transmissions ability on the net industrial wireless WIA-PA electricity consumption collection communication network in wireless telecommunications.
For achieving the above object, the invention provides following technical scheme:
Based on a power information acquisition system group-net communication method for WIA-PA technology, comprise the following steps:
S1: gateway device according to the device type of each node, for whole power information collection network distributes corresponding IPv6 address;
S2: in conjunction with network-building method and the power information collection network communication construction of WIA-PA technology, builds backbone network and the respective subnet of the power information acquisition system supporting IPv6 message transmissions;
S3: gateway device realizes gathering the power information of power consumer by the power information collection network built.
Further, step S1 specifically comprises the following steps:
S11: after each field apparatus (comprising routing device and conventional equipment) powers on, read and obtain electric meter address, it can be used as the device id (3byte) of self, and with vendor id (3byte) and device type (2byte) the IEEEEUI-64 address in conjunction with component devices;
S12: after routing node receives the networking beacon frame that gateway device regularly sends, will reply the instruction that joins request with EUI-64 address;
S13: after gateway device receives this order, device id field in the EUI-64 of wherein routing device is extracted, and according to the networking order of routing device, corresponding route ID can be distributed, and in gateway route table items, route ID corresponding with it for current device ID is mapped one by one; Reply simultaneously with overall route prefix, network PANID and route ID add the corresponding command frame;
S14: after routing device receives, the route ID distribute the device id of self, network PANID, overall route prefix, gateway and corresponding filling field combine the IPv6 address of 128 that become routing device, so far complete routing device IP address assignment;
S15: when adding the routing device of network after being assigned with corresponding IPv6 address, at network struction metric threshold time T, the beacon frame with routing node ID can be sent the cycle, after ordinary node receives, transmission has the routing device that joins request of self EUI-64 address, routing device is that ordinary node distributes respective nodes ID and sets up mapping table according to the same manner, transmission simultaneously adds corresponding, carries out combination complete self IPv6 address configuration after node device receives according to the same manner.
Further, step S3 specifically comprises:
Operator logo position is then " networking completes " by S31: when gateway device does not still have node to network after reaching network time metric threshold T, and sends networking to concentrator and complete instruction;
S32: after concentrator receives this instruction, will start the function such as module authentication, node address loading, and issue meter reading instruction;
S33: after gateway device receives instruction, resolves corresponding control domain and user data fields, if arrange or detect instruction, is then directly performed by gateway device and replys associated ACK frames, if the instruction such as routing inquiry or data reading system, then forwarding S34 to;
S34: first the destination address position in instruction takes out by gateway device, map with the long address in routing table, obtain the node IP v6 address on object table meter, and this address is inserted in the destination address data bit of network layer, simultaneously using the data bit in instruction as application layer load, package application layer frame head, transport layer header, internet layer head, WIA-PA network layer head, data link sub-layers head and MAC head, and be sent in the power information collection network based on WIA-PA technology;
S35: after routing device receives this instruction, according to the route ID position in IPv6 address, judges whether to have in routing table the path arriving this node, then directly to be sent by introductory path, turning S36 if do not exist as existed;
S36: routing device starts route finding process, sets up the path arriving destination node, copies and accepts related data simultaneously and return concentrated, completes when time power information data acquisition.
Further, the Route establishment process described in step S36 is further comprising the steps of:
S361: routing device starts route finding process and sends the H-RREQ message with Level Search metric threshold TTL_SEARCH, and wait for the RREQ_LIVE_TIME millisecond H-RREP message back time, wherein H-RREP message is with route level record mark position LAYER field;
S362: reply when this routing device node receives H-RREP within a RREQ_LIVE_TIME time, then Route establishment success; If do not receive reply, then LAYER is increased by 1, and searching threshold is increased progressively principle according to the power of level ring be set to TTL_SEARCH*LAYER, H-RREP Message Waiting Time increases equally, circulation above-mentioned steps, until Route establishment.
Further, the WIA-PA electricity consumption collection network with IPv6 message transmissions ability described in step S2 specifically comprises following characteristic:
1) the power information collection network constructed by is Mesh+Star topological structure, and in network, each node is the network node with transmission IPv6 message ability;
2), wherein in Mesh backbone network building process, send networking beacon by gateway device, routing device listen for beacons is also replied, and finally adds network; Added routing device has the function of forward gateway beacon and the reply of other routing device beacons simultaneously;
3) have the WIA-PA electricity consumption collection network of IPv6 message transmissions ability, its backbone network adopts the AODV annular level route search strategy based on improving to carry out path addressing;
4) in subnet building process, first the RREQ message with special field Q is sent by the conventional equipment node broadcasts being designated " networking ", radio network beacon frame will be started, this excessive power loss brought by reduction routing device periodic broadcasting beacon frame after the routing device networked receives this message.
Further, the routing device described in step S15 does not have the authority for routing device distribution short address, only has the authority for ordinary node equipment distributing IP, and routing device has needed corresponding Star subnet to build simultaneously; When routing device finds that its subnet node is less than one after networks are completed, be then automatically downgraded to common collecting device node.
Beneficial effect of the present invention is: this method IPv6 correlation technique is applied in the power information acquisition system based on WIA-PA technology, realize user equipment (UE) IP v6 address stateless automatically to configure, combine the power information WIA-PA network with double-deck topological structure simultaneously, utilize annular level route search strategy, collection is carried out to the user data in power utilization network and reports.The WIA-PA network with IPv6 message transmissions ability effectively combines with power information acquisition system by this invention, achieve user node IPv6 address in radio meter register, utilize hierarchy routing search strategy simultaneously, improve the problems such as the data acquisition success rate of wireless network in power information acquisition system and communication delay, facilitate the Applied D emonstration in the field that gathers in power information of domestic industry wireless WIA-PA standard.
Accompanying drawing explanation
In order to make object of the present invention, technical scheme and beneficial effect clearly, the invention provides following accompanying drawing and being described:
Fig. 1 is the power information acquisition system based on WIA-PA technology;
Fig. 2 is device node IPv6 address conversion strategy;
Fig. 3 is that routing device node adds network development process;
Fig. 4 is power information collection network IPv6 address assignment instance graph;
Fig. 5 is the power information image data transmission method based on WIA-PA technology;
Fig. 6 is the H-RREQ message sent;
Fig. 7 is the H-RREP message sent;
Fig. 8 is Network Route Finding.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Fig. 1 is a kind of power information acquisition system based on WIA-PA technology, and as shown in the figure, described system comprises power information and gathers main website, power information collection concentrator, the gateway device with CY2420 radio-frequency module and user side collecting device.In system, power information data acquisition has the WIA-PA network device address distribution of IPv6 address, supports that the WIA-PA network of IPv6 message transmissions builds, has the power information collection of WIA-PA double-layer network framework.The WIA-PA network device address wherein with IPv6 address is distributed, and adopts segmented stateless address allocation algorithm; WIA-PA network building process, comprises the WIA-PA network backbone network with IPv6 message transmissions function and builds and subnet structure; Based on the power information collection of WIA-PA network, comprise gateway device power information and extract, routing device power information forwards and field apparatus power consumption equipment acquisition phase.To be described in detail every part below.
Network appliance address allocation strategy and network struction:
In order to realize the IPv6 address of collection in worksite equipment, the stateless address configuration characteristic of analyzing IP v6 technology of the present invention, and in conjunction with the physical topology model of WIA-PA network, use segmented stateless address configuration strategy, be configured device node IPv6 address, concrete steps are as follows:
First, after each field apparatus (comprising routing device and conventional equipment) powers on, will send to ammeter and read electric meter address instruction, after ammeter receives instruction, will the address information of recovery of node ammeter.The address information of 2byte to 7byte will extracted in wherein DLT/645 frame after device node receives this information.And using the device id of rear 3byte information inverted order as this equipment self, simultaneously with vendor id (3byte) and device type (2byte) the IEEEEUI-64 address in conjunction with component devices, concrete form as shown in Figure 2;
As shown in Figure 3, after routing device node receives the networking beacon frame that gateway regularly sends, the instruction that joins request with node EUI-64 address will be replied;
After gateway device receives this order, device id field in the EUI-64 of wherein routing device is extracted, and according to the networking order of routing device, corresponding route ID can be distributed, and in gateway route table items, route ID corresponding with it for current device ID is mapped one by one.Reply simultaneously with overall route prefix, network PANID and route ID add the corresponding command frame;
After routing device receives, the route ID distribute the device id of self, network PANID, overall route prefix, gateway and corresponding filling field combine the IPv6 address of 128 that become routing device, concrete mode is shown in Fig. 2, so far completes routing device IP address assignment;
When adding the routing device of network after being assigned with corresponding IPv6 address, at network struction time measure threshold value T, the beacon frame with routing node ID can be sent the cycle, after ordinary node receives, transmission has the routing device that joins request of self EUI-64 address, routing device is that ordinary node distributes respective nodes ID and sets up mapping table according to the same manner, transmission simultaneously adds corresponding, carries out combination complete self IPv6 address configuration after node device receives according to the same manner.
The routing device wherein having added network has the function of forward gateway beacon and the reply of other routing device beacons, in network struction metric threshold time T, meeting periodic broadcasting sends the beacon frame with own node ID simultaneously, so that common acquisition node adds network.When ordinary node receives the beacon frame of multiple routing device transmission, will according to physical signalling intensity, the factors such as point-to-point success rate determine to add which subnet jointly, and its corresponding relation is σ=S × η
l.Wherein, S represents that node receives the physical signalling intensity characterization value of beacon, and point-to-point communication success rate index between η representational level, between η value larger representational level, communication reliability is higher.L represents the subnet ID receiving beacon routing node.Node selects the access of most suitable subnet by the σ value calculated.
According to the above-mentioned power information acquisition system IPv6 address allocation policy based on WIA-PA technology, the network topology structure of structure and corresponding routing device address are as shown in Figure 4.Gateway node mainly realizes access, the function such as protocol conversion and network management of WIA-PA network and existing network.Routing node mainly realizes route discovery, routing forwarding and subnetwork communicating function.Each routing node and subnet node all with IPv6 address and corresponding mask, by its mask and IPv6 address phase and the subnet information that can obtain oneself.Wherein network prefix is 0xFE80, network PANID is 0x1347, the mask-length of constructed network routing nodes is 112, for the subnet that routing node C builds, the long address of its routing nodes C is 0x428583, is also the electric meter address corresponding to it, and node 16 short address is 0x0100, the long address of its subnet interior joint 302 built is 0x372526 simultaneously, and 16 short addresses distributed by routing node C are 0x0102.
Network data acquisition:
In WIA-PA network, transmission that field apparatus sends datagram encapsulation flow process as shown in Figure 5, after gateway device receives the GDW/376.2 stipulations message that concentrator issues, is first resolved data flag, and is judged its data type.Determine it is directly to be replied by gateway device or for downlink data according to data type.When for downlink data message, long for the object in data cell address maps by gateway device in the address table of oneself, judges 16 short addresses of destination node, and is inserted in the destination address data bit of network layer this address.To the data message of transmission be needed as application layer load simultaneously, package application layer frame head, transport layer header, internet layer head, WIA-PA network layer head, data link sub-layers head and MAC head, and be sent in power information collection network, by corresponding route discovery algorithm, information is forwarded to destination node.After destination node receives data, resolve corresponding head, and its application layer load taking-up is passed to corresponding ammeter, then according to above-mentioned transmission path, data are sent to gateway device.
In said process, when gateway device needs to send message to object acquisition node, first the path whether existing and arrive destination node is checked in self routing table by gateway device, if exist, directly having more the routing information recorded in route table items and carry out transfer of data, when not existing, starting route finding process.Discovery procedure for network route adopts the Hierarchical Search HS-AODV routing algorithm improved, request message format (RREQ) in AODV Routing Protocol and routing reply (RREP) message format are improved simultaneously, annular Level Search metric threshold TTL_SEARCH and the maximum hop count MAX_HOP of network is added at RREQ, source backbone route node progressively expands search ring scope according to threshold value, TTL_SEARCH value reduces along with the increase of jumping figure in route finding process, and message format as shown in Figure 6.Wherein MAX_HOP value is network routing node number.Meanwhile, increase route search number of plies record mark position LAYER in RREP message, the search number of plies in place during record route discovery, message format as shown in Figure 7.In the search procedure that scope progressively expands, the ttl value that initiation node is arranged in the IP head of RREQ bag is at first TTL_START, and arranging the time-out time waiting for RREP is RREQ_LIVE_TIME millisecond.If during this period of time RREP wait timeout, then increase progressively principle by TTL_SEARCH according to the power of level ring, become TTL_SEARCH*LAYER by threshold value.If unsuccessful again, the like, until when after TTL_SEARCH>=MAX_HOP, then route search threshold value is set to MAX_HOP, still unsuccessful after TTL_SEARCH value is MAX_HOP, then think that this route finding process is failed.
Be illustrated in fig. 8 shown below, in constructed communication network, source node A needs to communicate with destination node D.Node A first according to the subnet ID of destination node judge whether with oneself belong to same subnet, if in same subnet, then directly transferred to by message the father node B of oneself to forward.If do not belong to same subnet, then start route finding process.Route B broadcasts a H-RREQ message, the Level Search metric threshold arranging this message in message is TTL_STEPONE, H-RREP is received not yet after wait RREQ_LIVE_TIME millisecond, this the Level Search metric threshold in H-RREQ message is increased progressively principle according to the power of level ring increase, and corresponding H-RREP Message Waiting Time increases equally simultaneously.Until search out the path arriving destination node C.After node receives H-RREP message, first judge the LAYER field value in message, and deposited the L field of the correspondence of this destination node route table items, this field can not be deleted with the destruction of route.When node needs the route being established to this destination node again, L*TTL_START will be first selected to carry out route searching as initial searches metric threshold in RREQ message.
For above-mentioned HS-AODV Routing Protocol, its route maintenance remains route maintenance mechanism in AODV on the one hand, namely confirm by periodically broadcasting hello packet that the existence of neighbours is (as link layer support feedback, also the feedback mechanism of link layer can be used), and notify that those disconnect the node updates routing table etc. affected by link by sending RERR message; On the other hand, add collection network maintenance mechanism, specifically comprise link-local and safeguard, node subnet changes and data maintenance.
1) link-local is safeguarded
The routing node of each forwarding messages can keep following the tracks of to the connection of the next-hop node of its activity, and also all node states keep intercepting with local subnet simultaneously.The subnet ordinary node being " networking " when a state can send the request H-RREQ message that networks, in this message, TTL_SEARCH field is complete 1, receive the routing node of this message, will initiation beacon broadcast, simultaneously node can select suitable routing node to send " join request message ", after receiving the response that routing node returns, namely add subnet.To effectively avoid routing node periodic broadcasting beacon to bring unnecessary energy ezpenditure like this, being also conducive to the equipment be positioned at around routing node better adds network simultaneously.When a movable route generation disconnecting, if when destination node distance is no more than maximum hop count, the upstream node that interruption position occurs can start link-local repair mechanism.Namely node can be increased to the sequence number of destination node, then broadcasts the RREQ message to destination node.On the other hand, if in the discovery procedure of route, routing node have received one or more RREP message (or upgrade route control message), it first with the jumping figure of new route with arrive destination node disabled route table items jumping figure compared with.If larger than the jumping figure depositing route known before in list item to the jumping figure of the new route of destination node, node will send the RERR message to destination node, then upgrades the route table items that it arrives this destination node.
2) node subnet changes
When the ordinary node being positioned at subnet is as found that the routing node at its place is unreachable, just change the state of oneself into " networking " and exit this subnet, send the RREQ message with distinctive mark position Q simultaneously, after routing node receives this message, then can start broadcast beacon order.Node is by formula σ=S × η
lcalculate oneself subnet routing node applicable to add.When the subnet nodes constructed by routing node is 0, then this routing node will be downgraded to ordinary node, and state is become " networking ", trigger above-mentioned enter network process.
3) data maintenance
In HS-AODV agreement, need to safeguard some list item data.Each subnet routing node has the authority to oneself subnet distributing IP address, and can store the address of the member node adding this subnet, increasing list item when there being node to add this subnet, regaining address when opposing node exits subnet, facilitating subsequent address to distribute.Meanwhile, each subnet routing node can store the path that arrives gateway device, and can upgrade contents in table along with route finding process.Equally, each subnet ordinary node stores the address of current affiliated routing node, and when subnet occurs to change, its value also can change equally.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.
Claims (6)
1., based on a power information acquisition system group-net communication method for WIA-PA technology, it is characterized in that: comprise the following steps:
S1: gateway device according to the device type of each node, for whole power information collection network distributes corresponding IPv6 address;
S2: in conjunction with network-building method and the power information collection network communication construction of WIA-PA technology, builds backbone network and the respective subnet of the power information acquisition system supporting IPv6 message transmissions;
S3: gateway device realizes gathering the power information of power consumer by the power information collection network built.
2. a kind of power information acquisition system group-net communication method based on WIA-PA technology according to claim 1, is characterized in that: step S1 specifically comprises the following steps:
S11: after each field apparatus powers on, reads and obtains electric meter address, it can be used as the device id of self, and with vendor id and the device type IEEEEUI-64 address in conjunction with component devices;
S12: after routing node receives the networking beacon frame that gateway device regularly sends, will reply the instruction that joins request with EUI-64 address;
S13: after gateway device receives this order, device id field in the EUI-64 of wherein routing device is extracted, and according to the networking order of routing device, corresponding route ID can be distributed, and in gateway route table items, route ID corresponding with it for current device ID is mapped one by one; Reply simultaneously with overall route prefix, network PANID and route ID add the corresponding command frame;
S14: after routing device receives, the route ID distribute the device id of self, network PANID, overall route prefix, gateway and corresponding filling field combine the IPv6 address of 128 that become routing device, so far complete routing device IP address assignment;
S15: when adding the routing device of network after being assigned with corresponding IPv6 address, at network struction metric threshold time T, the beacon frame with routing node ID can be sent the cycle, after ordinary node receives, transmission has the routing device that joins request of self EUI-64 address, routing device is that ordinary node distributes respective nodes ID and sets up mapping table according to the same manner, transmission simultaneously adds corresponding, carries out combination complete self IPv6 address configuration after node device receives according to the same manner.
3. a kind of power information acquisition system group-net communication method based on WIA-PA technology according to claim 2, is characterized in that: step S3 specifically comprises:
Operator logo position is then " networking completes " by S31: when gateway device does not still have node to network after reaching network time metric threshold T, and sends networking to concentrator and complete instruction;
S32: after concentrator receives this instruction, will start the function such as module authentication, node address loading, and issue meter reading instruction;
S33: after gateway device receives instruction, resolves corresponding control domain and user data fields, if arrange or detect instruction, is then directly performed by gateway device and replys associated ACK frames, if the instruction such as routing inquiry or data reading system, then forwarding S34 to;
S34: first the destination address position in instruction takes out by gateway device, map with the long address in routing table, obtain the node IP v6 address on object table meter, and this address is inserted in the destination address data bit of network layer, simultaneously using the data bit in instruction as application layer load, package application layer frame head, transport layer header, internet layer head, WIA-PA network layer head, data link sub-layers head and MAC head, and be sent in the power information collection network based on WIA-PA technology;
S35: after routing device receives this instruction, according to the route ID position in IPv6 address, judges whether to have in routing table the path arriving this node, then directly to be sent by introductory path, turning S36 if do not exist as existed;
S36: routing device starts route finding process, sets up the path arriving destination node, copies and accepts related data simultaneously and return concentrated, completes when time power information data acquisition.
4. a kind of power information acquisition system group-net communication method based on WIA-PA technology according to claim 3, is characterized in that: the Route establishment process described in step S36 is further comprising the steps of:
S361: routing device starts route finding process and sends the H-RREQ message with Level Search metric threshold TTL_SEARCH, and wait for the RREQ_LIVE_TIME millisecond H-RREP message back time, wherein H-RREP message is with route level record mark position LAYER field;
S362: reply when this routing device node receives H-RREP within a RREQ_LIVE_TIME time, then Route establishment success; If do not receive reply, then LAYER is increased by 1, and searching threshold is increased progressively principle according to the power of level ring be set to TTL_SEARCH*LAYER, H-RREP Message Waiting Time increases equally, circulation above-mentioned steps, until Route establishment.
5. a kind of power information acquisition system group-net communication method based on WIA-PA technology according to claim 1, is characterized in that: the WIA-PA electricity consumption collection network with IPv6 message transmissions ability described in step S2 specifically comprises following characteristic:
1) the power information collection network constructed by is Mesh+Star topological structure, and in network, each node is the network node with transmission IPv6 message ability;
2), wherein in Mesh backbone network building process, send networking beacon by gateway device, routing device listen for beacons is also replied, and finally adds network; Added routing device has the function of forward gateway beacon and the reply of other routing device beacons simultaneously;
3) have the WIA-PA electricity consumption collection network of IPv6 message transmissions ability, its backbone network adopts the AODV annular level route search strategy based on improving to carry out path addressing;
4) in subnet building process, first the RREQ message with special field Q is sent by the conventional equipment node broadcasts being designated " networking ", radio network beacon frame will be started, this excessive power loss brought by reduction routing device periodic broadcasting beacon frame after the routing device networked receives this message.
6. a kind of power information acquisition system group-net communication method based on WIA-PA technology according to claim 2, it is characterized in that: the routing device described in step S15 does not have the authority for routing device distribution short address, only have the authority for ordinary node equipment distributing IP, routing device has needed corresponding Star subnet to build simultaneously; When routing device finds that its subnet node is less than one after networks are completed, be then automatically downgraded to common collecting device node.
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