CN114584274A - Method for improving success rate of power utilization information acquisition - Google Patents

Abstract

The invention relates to a method for improving the success rate of electricity consumption information collection, belonging to the field of informatization. In the present invention, the upper-level node adopts the batch confirmation method for the lower-level STA, and only the nodes that have not been successfully copied are marked in the batch confirmation frame, which reduces the number of messages in the confirmation frame and further reduces the message conflict when a large amount of data is reported. Finally, at the CCO, the entire network is confirmed to receive the response data, which ensures the success rate of all nodes in response to data transmission. The invention adopts a variety of backup means. After the first transmission fails, the backup PCO transmission is adopted. If it still fails, route repair measures are taken, which not only realizes the mechanism of where the packet is lost and where the retransmission is, but also ensures that the node can find the The CCO channel successfully transmits data to the CCO, which improves the success rate of information collection compared with the original method.

Description

A method to improve the success rate of electricity consumption information collection

technical field

The invention belongs to the field of informatization, and relates to a method for improving the success rate of electricity consumption information collection.

Background technique

The user's electricity consumption information collection system is a system that collects, processes and monitors the electricity consumption information of electricity users in real time. Functions such as information exchange of electrical equipment provide basic data and basis for "volume, price, cost and loss, power grid transformation" in order to improve work efficiency.

The architecture of the user electricity information collection system is shown in Figure 1. The user's electricity consumption information collection system is mainly composed of the main station, the local communication system and the communication network connecting each device, which is the basis for realizing the user's electricity consumption information collection.

Referring to Figure 2 and Figure 3, the local communication system is usually a tree structure (as shown in Figure 2) or a mesh structure (as shown in Figure 3), including a concentrator, multiple energy meters and communication modules, the communication modules are respectively It is set in the concentrator and each electric energy meter as a node to form the communication network of the electricity consumption information acquisition system. The communication module set in the concentrator is the central coordinator of the communication network (CCO for short), which is responsible for starting the information collection service, sending the information collection items, receiving the power consumption information data and sending it to the concentrator during the electricity consumption information collection process. The communication module set in each electric energy meter is divided into the proxy coordinator (referred to as PCO) and the station (referred to as STA) of the communication network according to the role in the network. In the process of electricity consumption information collection, the PCO is responsible for receiving or forwarding the information collection of the CCO. command, STA sends the data to the electric energy meter, obtains the electricity consumption information of the electric energy meter and sends it to the CCO.

As shown in FIG. 2 and FIG. 3 , the local communication system network includes a CCO and multiple STAs, and communication between the STA and the CCO is performed through a preset route. For a specific STA, the route to the CCO is the The upper-level node is the PCO of the STA, and there can be multiple STAs under one PCO. The uppermost layer, that is, the first-layer STA communicates directly with the CCO without being forwarded by the PCO. Due to changes in network topology, the roles of PCO and STA can be interchanged.

Each communication module specifically includes an application layer (referred to as APP layer), a data link layer (referred to as DATA layer), and a physical layer (referred to as PHY layer). The data link layer includes the NWK layer and the MAC layer. The data collected by the information is transmitted along the dashed line direction shown in FIG. 4 .

In the smart grid, the collection process is that the concentrator sends the information collection command frame to the designated STA through the CCO; after the STA receives the information collection command frame sent by the CCO, it sequentially obtains the electricity consumption specified by the information collection entry from the energy meter corresponding to the STA. Information data items are aggregated, and an information collection response frame is constructed and uploaded to the CCO. After completing a data collection, the CCO reports to the concentrator after receiving the information collection response frame sent by the STA.

Through the analysis of the development and application of the power industry, whether it is to provide basic services such as power consumption analysis, load forecast and early warning, and electricity bill balance early warning for power users, or to provide power workers with abnormal monitoring and early warning, line loss management, etc. Auxiliary management tasks such as equipment operation and maintenance all need to collect the same data items in a certain period of time. In this context, the master station can control the concentrator to plan a periodic information collection task, and the CCO and PCO broadcast through beacons. For the collection task, all nodes periodically automatically report the relevant data of the electric energy meter according to the information collection task when their reporting time expires, and the PCO collects the response data of the lower nodes and reports it layer by layer. A schematic diagram of this fast acquisition method is shown in Figure 5.

In order to ensure the reliability of data collection, a confirmation and retransmission mechanism is set at the communication module. The traditional confirmation and retransmission mechanism is that when the CCO receives the collection command from the concentrator, it is first processed by the APP layer of the CCO. The APP layer adds the constructed collection command to the retransmission list before transmitting the data to the DATA layer. Set a retransmission timer. If the response data of the specified STA is received within the specified time, the retransmission timer and the corresponding data of the retransmission list will be deleted; if the response frame of the specified STA is not received within the specified time, it will be sent from the APP The layer re-issues the command. If the response data from the designated STA is not received after the maximum number of retransmissions is exceeded, it is determined that the reading of the node has failed, and the current round of information collection on the node is abandoned.

Between the communication module and the communication module, before sending data, the DATA layer will add the constructed data frame to the retransmission list and set a retransmission timer. If an acknowledgment frame ( ACK frame), delete the retransmission timer and correspond to the data in the retransmission list; if the ACK frame from the destination node is not received within the specified time, the data frame is retransmitted. If the ACK frame from the destination node is not received after the maximum number of retransmissions is exceeded, the transmission is abandoned.

It can be seen that there is a confirmation mechanism for every communication between two adjacent nodes. If the level of the copied node is higher, the number of times it is forwarded through the PCO will be more. For each additional hop, 4 additional confirmations are required It also increases the probability of transmission failure, which may lead to more retransmitted packets. The overhead of such repeated transmission of packets is greater, and the retransmission still fails, and 100% collection success cannot be guaranteed. Therefore, it is necessary to further solve the problems of high overhead and low efficiency of retransmission and acknowledgment packets.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a method for improving the success rate of electricity consumption information collection. When the node periodically reports response data, the batch confirmation mechanism and the use of active/standby relay nodes, route switching and route repair are used to ensure the successful upload of uplink packets.

For achieving the above object, the present invention provides the following technical solutions:

A method for improving the success rate of electricity consumption information collection, the method comprises the following steps:

S1: All nodes add the response data frame to the retransmission list at the APP layer before sending the response data frame to the upper-level node; the reporting nodes include lower-level STA nodes and lower-level PCO nodes;

S2: The upper-level node adopts a point-to-point acknowledgment method for the lower-level PCO, that is, immediately returns an ACK frame to the lower-level PCO after receiving the data frame;

Among them, the ACK frame needs to be transmitted to the APP layer, and the AAP layer needs to further process the retransmission list;

S3: If the lower-level PCO node receives the ACK frame, it releases the corresponding data in the retransmission list to complete the current transmission task; if it does not receive the ACK frame, it reports the response data to the standby upper-level PCO;

Among them, after the lower-level PCO node transmits the response data to the backup upper-level PCO, if it receives the ACK frame of the backup upper-level PCO, it releases the retransmission list and completes this transmission task;

If the ACK frame of the standby upper-level PCO is not received, the route repair process is started, that is, the node finds a path with the CCO, and the corresponding data is successfully transmitted to the CCO through this route;

Among them, each node in the network has a neighbor node, which can obtain the communication success rate between the node and the neighbor node, and the neighbor node is a CCO or PCO or STA; the backup superior PCO is selected by the factors of the communication success rate and the path;

S4: After the upper-level node reports the collected data when its own reporting time is up, it constructs a batch confirmation message and sends it to the lower-level STA node. The reported data of the subordinate STA node is in the continuous receiving state;

S5: The lower-level STA node receives and parses the confirmation frame. If it is not marked, it will transfer the corresponding data in the retransmission list to the backup list, and release the corresponding data in the retransmission list; if it is marked, it will retransmit this secondary data;

Among them, if the retransmission still fails, wait for the replenishment command of the CCO;

Among them, the backup list is to prevent the loss of the response data reported by the node in the subsequent transmission; to ensure that the original data still exists when the CCO is replenished; the backup list retains the response data of nearly 3 times;

S6: After the CCO reports the collected data to the concentrator, it checks the integrity of the response data of all nodes in the network;

Among them, after receiving the response data, the CCO does not perform batch confirmation on the STAs directly connected to the lower level, and directly supplements the nodes that have not been successfully read in the entire network.

Optionally, the confirmation method between the upper-level node and the lower-level PCO and the lower-level STA is:

The proxy node PCO in the network confirms whether the upload of its own data is successful, and provides feedback on the data transmission status of the subordinate nodes;

On the above, the PCO adds the uploaded data to the retransmission list backup, and deletes it from the retransmission list after receiving the confirmation frame from the upper-level node;

Right, after the PCO is reported, a batch confirmation message is constructed and sent to the subordinate nodes. In the batch confirmation message, the subordinate nodes that have not received the collection response data are marked, and the reported data of the marked node is in the state of continuing to receive.

Optionally, after the PCO reports the collected response data to the upper-level node, the processing flow with the upper-level PCO is as follows:

Case 1: After reporting the aggregated response data to the upper-level node and receiving the confirmation frame, the retransmission list is released to complete the current transmission task of this node;

Case 2: After the aggregated response data is reported to the upper-level node, the confirmation frame is not received, and the maximum number of retransmissions is reached, and this response data is reported to the standby PCO;

Case 3: After reporting the aggregated response data to the standby superior node, if an acknowledgement frame is received, the retransmission list is released to complete the transmission task; if the acknowledgement frame is not received and the maximum number of retransmissions is reached, the routing is started The repair process is to find a path with the CCO for this node, and successfully transmit the corresponding data to the CCO through this route;

Among them, the PCO has a directly connected upper-level node. In addition, several backup upper-level nodes are maintained in the network. When the communication with the directly-connected upper-level node fails, the PCO will select the backup upper-level node with the best communication quality. Retransmission is performed to ensure the success rate of the transmission.

Optionally, the processing flow between the PCO and the lower-level STA after reporting the collected response data to the upper-level node is as follows:

If the PCO receives the retransmission message from the marked node, it continues to report it to the upper-level node; if it does not receive the retransmitted message from the marked node, it waits for the CCO's replenishment command and then reads the lower-level node.

The beneficial effects of the present invention are:

(1) The original confirmation method requires point-to-point confirmation. In the present invention, the upper-level node adopts the batch confirmation method for the lower-level STA, and only the nodes that have not been successfully copied are marked in the batch confirmation frame, which reduces the number of confirmation frames. , to further reduce the packet conflict when a large amount of data is reported. Finally, at the CCO, the entire network is confirmed to receive the response data, which ensures the success rate of all nodes responding to the data transmission.

(2) In the original retransmission mechanism, the retransmission judgment time is long, and the retransmission needs to be retransmitted from the source according to the original route. The packet overhead and time overhead of the retransmission are large, and the retransmission still fails. The invention adopts a variety of backup means. After the first transmission fails, the transmission of the backup PCO is adopted. If it still fails, route repair measures are taken, which not only realizes the mechanism of where the packet is lost and where the retransmission is, but also ensures that the node can find a The CCO channel successfully transmits data to the CCO, which improves the success rate of information collection compared with the original method.

Other advantages, objects, and features of the present invention will be set forth in the description that follows, and will be apparent to those skilled in the art based on a study of the following, to the extent that is taught in the practice of the present invention. The objectives and other advantages of the present invention may be realized and attained by the following description.

Description of drawings

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be preferably described in detail below with reference to the accompanying drawings, wherein:

Figure 1 shows the architecture of the electricity information collection system;

Figure 2 is a tree network structure;

Figure 3 is a mesh network structure;

Figure 4 shows the direction of information collection data transmission;

Fig. 5 is a schematic diagram of a fast collection method;

Fig. 6 is the schematic diagram of confirmation mode;

Fig. 7 is the confirmation and retransmission flow of PCO and upper node;

Fig. 8 is the confirmation and retransmission flow of PCO and STA;

Fig. 9 is a route repair request message transmission process;

Figure 10 is the routing reply message transmission process;

Figure 11 is the routing response process;

FIG. 12 is a flow of route repair link confirmation.

Detailed ways

The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only used to illustrate the basic idea of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

Among them, the accompanying drawings are only used for exemplary description, and represent only schematic diagrams, not physical drawings, and should not be construed as limitations of the present invention; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings will be omitted, The enlargement or reduction does not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the accompanying drawings may be omitted.

The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms “upper”, “lower”, “left” and “right” , "front", "rear" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must be It has a specific orientation, is constructed and operated in a specific orientation, so the terms describing the positional relationship in the accompanying drawings are only used for exemplary illustration, and should not be construed as a limitation of the present invention. situation to understand the specific meaning of the above terms.

Please refer to FIG. 9 to FIG. 12 , which are a method for improving the success rate of electricity consumption information collection.

S1: All nodes add the response data frame to the retransmission list at the APP layer before sending it to the upper node.

The reporting nodes include STAs and PCOs, which are called subordinate STA nodes and subordinate PCO nodes.

S2: The upper-level node still adopts the point-to-point acknowledgment method to the lower-level PCO, that is, immediately returns an ACK frame to the lower-level PCO after receiving the data frame.

Different from the traditional method, the ACK frame in the present invention needs to be transmitted to the APP layer, and the AAP layer needs to further process the retransmission list.

S3: If the lower-level PCO node receives the ACK frame, it releases the corresponding data in the retransmission list to complete the current transmission task; if it does not receive the ACK frame, it reports the current response data to the standby upper-level PCO.

Wherein, after the lower-level PCO node transmits the response data to the backup upper-level PCO, if it receives the ACK frame of the backup upper-level PCO, it releases the retransmission list to complete the current transmission task.

If the ACK frame from the standby superior PCO is not received, the route repair process is started, that is, a path between the node and the CCO is found, and the corresponding data is successfully transmitted to the CCO through this route.

Among them, each node in the network has a neighbor node, and the communication success rate between the node and the neighbor node can be obtained, and the neighbor node is a CCO, or a PCO, or other STA. The backup upper-level PCO can be selected by factors such as communication success rate and path.

S4: After the upper-level node reports the collected data when its own reporting time is up, it constructs a batch confirmation message and sends it to the lower-level STA node. The data reported by the lower-level STA node is in the continuous receiving state.

S5: The subordinate STA node receives and parses the confirmation frame. If it is not marked, it will transfer the corresponding data in the retransmission list to the backup list, and release the corresponding data in the retransmission list; if it is marked, it will retransmit the secondary data.

Wherein, if the retransmission still fails, wait for the CCO's replenishment command.

Among them, the backup list is to prevent the loss of the response data reported by the node this time in the subsequent transmission, and to ensure that the original data is still stored in the CCO replenishment. Only the response data of nearly 3 times need to be kept in the backup list.

S6: After the CCO reports the collected data to the concentrator, it checks the integrity of the response data of all nodes in the network.

Among them, the CCO is a special upper-level node. After receiving the response data, it does not need to perform batch confirmation on the STAs directly connected to the lower-level, but directly supplements the nodes that have not been successfully copied in the entire network.

Fig. 6 is a schematic diagram of the confirmation mode between the upper-level node and the lower-level PCO and the lower-level STA.

The proxy node PCO in the network not only needs to confirm whether its own data is uploaded successfully, but also needs to give feedback on the data transmission status of the subordinate nodes.

That is to say, the PCO needs to add the uploaded data to the retransmission list backup, and delete it from the retransmission list after receiving the confirmation frame from the upper-level node.

Right, after the PCO is reported, a batch confirmation message is constructed and sent to the subordinate nodes. In the batch confirmation message, the subordinate nodes that have not received the collection response data are marked, and the reported data of the marked node is in the state of continuing to receive.

Figure 7 shows the processing flow between the PCO and the upper-level PCO after reporting the collected response data to the upper-level node.

In Figure 7, three cases of PCO are discussed.

After the aggregated response data is reported to the superior node, and the confirmation frame is received, the retransmission list is released to complete the current transmission task of the node.

After the aggregated response data is reported to the upper-level node, the acknowledgment frame is not received, and the maximum number of retransmissions is reached, and the current response data is reported to the standby PCO.

After reporting the aggregated response data to the standby superior node, if the confirmation frame is received, the retransmission list is released to complete the transmission task; if the confirmation frame is not received and the maximum number of retransmissions is reached, the route repair process is started. That is, the node finds a path with the CCO, and successfully transmits the corresponding data to the CCO through this route.

Among them, the PCO has a directly connected upper-level node. In addition, several backup upper-level nodes are maintained in the network. When the communication with the directly-connected upper-level node fails, the PCO will select the backup upper-level node with the best communication quality. Retransmission is performed to ensure the success rate of the transmission.

Figure 8 shows the processing flow between the PCO and the lower-level STA after the PCO reports the aggregated response data to the upper-level node.

As shown in Figure 8, if the PCO receives the retransmission message from the marked node, it can continue to report it to the upper-level node. If the retransmission message of the marked node is not received, wait for the CCO's replenishment command and then read the subordinate node.

Example 1: Confirmation frame format

The present invention has two kinds of confirmation frames, one is the point-to-point confirmation frame of the upper-level node to the lower-level PCO, and the other is the batch confirmation frame of the upper-level node to the lower-level STA.

The point-to-point confirmation frame format of the upper-level node to the lower-level PCO is shown in Table 1.

Table 1 ACK frame format

The first four bytes and the last three bytes are a unified frame format similar to a frame, and bytes 4-12 are the contents of the ACK frame.

Among them, the receiving result represents the receiving result of the transmitted SOF frame (response data frame sent on the air interface), and the value and interpretation of the receiving result are shown in Table 2.

Table 2 Received result values

value definition 0 Indicates that all SOF frames are successfully received. 1 Indicates that the physical block of the SOF frame has a cyclic redundancy check failure. other reserve

The reception status is a 4-bit field used to indicate the verification result of the physical block of the SOF frame in the normal mode. A SOF frame can carry up to 4 physical blocks, each bit indicates whether a physical block is successfully verified, bit 0 indicates the verification result of the physical block with serial number 0, and bit 1 indicates the physical block with serial number 1. The verification result, the rest is analogous, when the bit of the receiving state is 0, it means that the corresponding physical block verification fails, and when the bit is 1, it means that the corresponding physical block is successfully verified.

The source TEI (Terminal Equipment Identifier) is a 12-bit field, which is represented as the TEI of the source terminal of the ACK frame, where the TEI is the unique identifier of the node assigned by the CCO to each node when it accesses the network.

The destination TEI is a 12-bit field representing the TEI of the destination terminal of the ACK frame.

The number of received physical blocks is the number of received physical blocks, including the number of physical blocks with parsing errors.

Channel quality, indicating the channel quality calculated by the station when it receives the SOF packet corresponding to this frame. Channel quality is represented by raw SNR data.

Site load, indicating the load of the source site of the ACK frame, and the value is the number of unsent buffered packets on the source site.

The extended frame type indicates the extended frame type defined above the delimiter type, and the meaning is shown in Table 3.

Table 3 Extended frame types

value illustrate 0 Denoted as an ACK frame. 1 Represented as batch acknowledgment frames other reserve

The batch acknowledgment frame of the upper node to the lower STA is changed on the basis of the ACK frame.

The destination TEI is no longer the determined node TEI, but all 12 bits are set to 1, indicating that this batch confirmation frame is broadcast to the subordinate nodes.

Its extended frame type identifier is 1, indicating that this frame is a batch confirmation frame.

In the middle of the extended frame type field and the frame control check sequence, the node information that has not been successfully copied is marked, as shown in Table 4.

Table 4 Unread successful node information

The number of nodes that fail to read n TEI of failed node 1 ... TEI of failed node n

Example 2: Routing Repair

If the node fails to upload the response data successfully through the standby PCO, it selects the route repair, and immediately finds the path with the CCO for the node.

When the node confirms that it needs to initiate route repair, it sends a route request message in the form of broadcast to search for the final destination node. By limiting the number of transmission hops of the routing request message, the impact of conflicts and communication delays caused by a large number of communication messages is reduced. The routing request message transmission process is shown in Figure 9.

After receiving the route request message, the final site searched by the route request message needs to organize the route reply message, and send the route reply message to the originating site of the route request message in the form of a unicast message. The site participating in the route repair task shall record the information of at least one route request message received, and for the site that processes and forwards the route reply message, it shall determine the next hop site for sending the route reply message according to the above recorded information. The routing reply message transmission process is shown in Figure 10.

If the site that initiates the routing request receives the corresponding routing reply message within a predetermined time, the site will send a routing reply message to the searched final destination site to notify the final destination node. The routing response process is shown in Figure 11.

If the site that initiates the routing request message does not receive the corresponding routing reply message within the predetermined time, the site will send a routing error message to the original site that triggered the routing request task, and notify the task in the form of a unicast message. The service packets of the original site failed to be forwarded.

When forwarding a route reply message, a site can use the link confirmation request message to initiate link evaluation to determine the next destination site of the route reply message.

After receiving the link acknowledgment request message, the station determines whether to send the link acknowledgment response message after evaluating the relevant local routing data. The link response message carries the relevant link information and responds to the initiating site of the link confirmation message. The link confirmation process is shown in Figure 12.

After receiving the link confirmation reply message, the initiating site of the link confirmation request message can select the destination site of the next hop of the route. After determining the next hop, it needs to forward the route reply message.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent replacements, without departing from the spirit and scope of the technical solution, should all be included in the scope of the claims of the present invention.

Claims (4)

1. A method for improving the success rate of power utilization information acquisition is characterized in that: the method comprises the following steps:

s1: all nodes add the response data frame to a retransmission list in an APP layer before sending the response data frame to the superior node; the reporting node comprises a lower STA node and a lower PCO node;

s2: the superior node adopts a point-to-point confirmation mode for the subordinate PCO, namely, an ACK frame is immediately replied to the subordinate PCO after receiving the data frame of the subordinate PCO;

wherein, the ACK frame needs to be transmitted to the APP layer, and the AAP layer needs to further process the retransmission list;

s3: if the lower PCO node receives the ACK frame, releasing corresponding data in the retransmission list and completing the transmission task; if the ACK frame is not received, reporting the response data to the standby upper-level PCO;

after the lower PCO node transmits the response data to the standby upper PCO, if an ACK frame of the standby upper PCO is received, the retransmission list is released, and the transmission task is completed;

if the ACK frame of the standby superior PCO is not received, starting a route repair process, namely searching a path with the CCO for the node, and successfully transmitting corresponding data to the CCO through the route;

each node in the network has a neighbor node, which can acquire the communication success rate of the node and the neighbor node, wherein the neighbor node is a CCO (central control unit) or a PCO (primary control unit) or an STA (station); selecting a standby upper-level PCO according to the communication success rate and the path factor;

s4: after the upper node reports the collected data when the reporting time of the upper node is up, constructing a batch acknowledgement message and sending the batch acknowledgement message to the lower STA node, marking the lower STA node which does not receive the collected response data in the batch acknowledgement message, and keeping the reported data of the marked lower STA node in a continuous receiving state;

s5: the lower-level STA node receives and analyzes the confirmation frame, if the lower-level STA node is not marked, corresponding data in the retransmission list is transferred to a backup list, and corresponding data in the retransmission list is released; if the current data is marked, retransmitting the current data;

if the retransmission still fails, waiting for a point supplementing command of the CCO;

the backup list is used for preventing response data reported by the nodes from being lost in subsequent transmission; to ensure that original data is stored when CCO points are supplemented; reserving the response data for nearly 3 times in the backup list;

s6: after reporting the collected data to the concentrator, the CCO checks the integrity of the response data of all the nodes in the network;

after receiving the response data, the CCO does not perform batch confirmation on the directly connected STAs in the lower level, and directly performs point supplementation on the nodes which are not successfully copied in the whole network.

2. The method for improving the success rate of power utilization information acquisition according to claim 1, characterized in that: the confirmation mode of the upper node, the lower PCO and the lower STA is as follows:

the PCO of the agent node in the network confirms whether the data of the PCO is uploaded successfully or not and feeds back the data transmission condition of the lower node;

in contrast, the PCO adds the uploaded data to a retransmission list backup, and deletes the uploaded data from the retransmission list after receiving the acknowledgement frame of the superior node;

and after the PCO is reported, constructing a batch acknowledgement message and sending the batch acknowledgement message to the subordinate nodes, marking the subordinate nodes which do not receive the collected response data in the batch acknowledgement message, and keeping the reported data of the marked nodes in a continuous receiving state.

3. The method for improving the success rate of power utilization information acquisition according to claim 2, characterized in that: after the PCO reports the collected response data to the superior node, the processing flow with the superior PCO is as follows:

case 1: after the collected response data is reported to the superior node, if the confirmation frame is received, the retransmission list is released, and the transmission task of the node is completed;

case 2: after the collected response data is reported to the superior node, the response data is reported to the standby PCO when the confirmation frame is not received and the maximum retransmission times is reached;

case 3: after the collected response data is reported to the standby superior node, if the confirmation frame is received, the retransmission list is released, and the transmission task is completed; if the confirmation frame is not received, starting a route repair flow, searching a path between the node and the CCO for the node, and successfully transmitting corresponding data to the CCO through the route;

the PCO has a directly connected superior node, besides, a plurality of standby superior nodes are maintained in the network, and when the communication with the directly connected superior nodes fails, the PCO can select the standby superior node with the best communication quality to retransmit so as to ensure the success rate of transmission.

4. The method for improving the success rate of power utilization information acquisition according to claim 3, characterized in that: the processing flow of the PCO and the lower-level STA after reporting the collected response data to the upper-level node is as follows:

if receiving the retransmission message of the marking node, the PCO continues to report to the superior node; and if the retransmission message of the marking node is not received, waiting for a point supplementing command of the CCO and then copying and reading the subordinate node.

Images