WO2015192376A1 - Method and device for assigning ordered numbers to mounted nodes on bus - Google Patents

Abstract

A method and device for assigning ordered numbers to mounted nodes on a bus, applicable in a bus system. The method comprises: a control node acquires a first identity of each mounted node; the control node measures the distance between each mounted node and the control node on the basis of the first identity of each mounted node to acquire distance characteristic information of each mounted node; the control node assigns an ordered serial number to each mounted node on the basis of the distance characteristic information of each mounted node; and, the control node transmits the ordered serial number to a corresponding mounted node. The method and deice allows the control node to learn the order in which the mounted nodes are arranged on the bus, thus implementing individual communication between the control node and each mounted node.

Description

 Method and device for assigning ordered numbers to mount nodes on bus

TECHNICAL FIELD The present invention relates to the field of communications, and more particularly to a method and apparatus for assigning an ordered number to a mount node on a bus. BACKGROUND OF THE INVENTION In a 485 bus system, a control node and a mount node mounted on the bus are included, and the control node and the mount node communicate through the 485 bus.

 In the 485 bus system, the control node often needs to understand the order of the mounted nodes on the bus, in order to understand the relative position between the mounted nodes and the relative position between the control node and the mounted node, so as to better match the bus. The upper mount node performs control; moreover, in order to perform separate communication with each mount node mounted on the bus, the control node first needs to obtain the Sn number (ie, the serial number) of each mount node on the bus, so that the control node is Each mount node on the bus is assigned a unique identification number (ID) in the 485 bus system, so that each mount node uses its own identification number to identify whether the command issued by the control node via the bus belongs to itself. Control separate communication between nodes.

 At present, it is generally artificial to input the Sn number of each mount node in the 485 bus system into the control node, but for a 485 bus system that does not know how many mount nodes are included and does not know the Sn number of each mount node, control The node cannot know the information such as the Sn number of each mount node on the bus, and thus cannot know the order of the mount nodes on the bus, and cannot communicate with each mount node separately. SUMMARY OF THE INVENTION Embodiments of the present invention provide a method and apparatus for allocating an ordered number to a mount node on a bus, so that the control node can learn the order of the mount nodes on the bus, and realize that the control node communicates with each mount node separately. .

 In a first aspect, a method for assigning an ordered number to a mount node on a bus is provided, the bus system comprising a control node and at least one mount node, the control node and the mount node Communication between the buses; the method includes:

 The control node acquires a first identifier of each mounted node;

The control node separately measures each of the mount nodes and the control node according to the first identifier of each mount node. The distance between the nodes is obtained, and the distance characteristic information of each mount node is obtained;

 The control node assigns an ordered sequence number to each of the mount nodes according to the distance feature information of each mount node; the control node sends the ordered sequence number to the corresponding mount node.

 Optionally, the control node acquires the first identifier of each of the mounted nodes, including:

 The control node sends a report command, where the report command is used to indicate that each of the mount nodes reports the first identifier, and the report command includes the report delay generation algorithm identifier, and the report delay generation algorithm identifier is used to indicate each mount node. The reporting delay generation algorithm used when reporting the first identifier, so that each of the mount nodes determines the delay time for sending the first identifier by itself;

 The control node receives the first identifier sent by each of the mount nodes;

 The control node sends an acknowledgement command, where the acknowledgement command includes a first identifier received by the control node after the report command is sent, so that each mount node confirms whether the control node receives its first identifier.

 Optionally, after the control node sends the confirmation command, the method further includes:

 The control node sends a report of the report of the next round; the report of the report delay generation algorithm included in the report of the two adjacent rounds is different;

 The control node receives the first identifier sent by the mount node that is confirmed by the control node; the control node sends an acknowledgement command, where the acknowledgement command includes the first identifier received by the control node after sending the report command of the next round.

 Optionally, the control node separately measures the distance between each of the mounted nodes and the control node according to the first identifier of each of the mounted nodes, and obtains the distance characteristic information of each of the mounted nodes, including:

 The control node allocates a ranging identifier to each of the mounting nodes, and sends a corresponding relationship between the first identifier and the ranging identifier, so that each of the mounting nodes obtains its own ranging identifier according to the first identifier of the mounting node;

 The control node uses the ranging identifier to measure the distance between each of the mounted nodes, and obtains the distance characteristic information of each of the mounted nodes.

 Optionally, the control node uses the ranging identifier to measure the distance between each of the mounted nodes, and obtains the distance characteristic information of each of the mounted nodes, including:

 For each of the mount nodes, the control node sends a ranging command, where the ranging command includes a ranging identifier of the mounted node;

 The control node determines a length of time from the sending of the ranging command to the receipt of the reply command of the mounted node; the control node determines the distance characteristic information of the mounted node according to the length of time.

Optionally, the control node uses the ranging identifier to measure a distance between each mounted node, and obtains The distance characteristic information of each mount node further includes:

 The control node repeats the steps of transmitting the ranging command and determining the length of time, and obtaining N time lengths corresponding to the respective mounting nodes; N is an integer greater than or equal to 2;

 Determining the distance characteristic information of the mounting node according to the length of time includes: the control node filtering the obtained N time lengths;

 The control node performs statistical value calculation according to the filtering result, obtains a statistical value of the length of time, and determines the statistical value of the length of time as the distance characteristic information of the mounted node.

 Optionally, the control node performs filtering processing on the obtained N time lengths, including: for the N time lengths, the control node removes a length of time in which the value is greater than or equal to the first set threshold, and the value is less than or equal to The second set threshold is a time length, and the first set threshold is greater than the second set threshold.

 Optionally, the control node separately measures the distance between each of the mounted nodes and the control node according to the first identifier of each of the mounted nodes, and obtains the distance characteristic information of each of the mounted nodes, including:

 The control node uses the first identifier to measure the distance between each of the mount nodes, and obtains the distance feature information of each of the mount nodes.

 Optionally, the control node allocates an ordered sequence number to each of the mount nodes according to the distance feature information of each of the mount nodes, including:

 The control node sorts the distance feature information of each of the mounted nodes according to a preset order. The control node assigns the ordered serial numbers to the respective mount nodes according to the sorting result of the distance feature information of the mounted nodes.

 Optionally, the control node sends the sequenced sequence number to the corresponding mount node, where: the control node sends a sequence number to send a command, where the sequence number issuing command includes: the first identifier and the order of each mount node The corresponding relationship of the serial numbers, so that each of the mount nodes obtains the ordered sequence number corresponding to the first identifier according to the first identifier of the first identifier.

 In a second aspect, a device for assigning an ordered number to a mount node on a bus is provided, which is applied to a control node in a bus system, and the control node communicates with a mount node in the bus system via a bus; Includes:

 An obtaining unit, configured to acquire a first identifier of each mounted node;

 a measuring unit, configured to respectively measure a distance between each of the mounting nodes and the control node according to the first identifier of each of the mounting nodes, to obtain distance characteristic information of each of the mounting nodes;

An allocation unit, configured to allocate an ordered order to each mounted node according to distance feature information of each mounted node Serial number

 And a sending unit, configured to send the ordered sequence number to the corresponding mount node.

 Optionally, the acquiring unit is specifically configured to:

 Sending a report command, the report command is used to instruct each of the mount nodes to report the first identifier, and the report command includes a report delay generation algorithm identifier, where the report delay generation algorithm identifier is used to indicate that each mount node reports The reporting delay generation algorithm used in the identification, so that each of the mounting nodes determines the delay time for sending the first identifier by itself;

 Receiving a first identifier sent by each of the mount nodes;

 Sending a confirmation command, where the confirmation command includes a first identifier received by the control node after sending the report command, so that each of the mount nodes confirms whether the control node receives its first identifier.

 Optionally, the acquiring unit is further configured to:

 After the confirmation command is sent, the next round of the reporting command is sent; the reporting delay generation algorithm identifier included in the adjacent two rounds of reporting commands is different; receiving the first identifier sent by the mounting node that is not confirmed by the control node; sending a confirmation command The confirmation command includes a first identifier that is received after the control node sends the reporting command of the next round.

 Optionally, the measuring unit includes:

 An allocation subunit, configured to allocate a ranging identifier to each of the mount nodes;

 a sending subunit, configured to send a correspondence between the first identifier and the ranging identifier, so that each of the mounting nodes acquires its own ranging identifier according to the first identifier of the first mounting node;

 And a measuring subunit, configured to measure a distance between each of the mounting nodes by using the ranging identifier, and obtain distance characteristic information of each of the mounting nodes.

 Optionally, the measuring subunit is specifically configured to: send a ranging command to each of the mounting nodes, where the ranging command includes a ranging identifier of the mounting node; determining, from sending the ranging command to receiving The length of the reply command of the mount node; determining the distance feature information of the mount node according to the length of time.

 Optionally, the measuring subunit is further configured to: repeatedly perform the step of transmitting the ranging command N-1 times and determining the length of time, and obtain N time lengths corresponding to the respective mounting nodes; N is greater than or equal to An integer of 2; filtering the obtained N time lengths; performing statistical value calculation according to the filtering result, obtaining a statistical value of the length of time, and determining the statistical value of the time length as the distance characteristic information of the mounted node.

Optionally, the measuring subunit is further configured to: remove the N time lengths The value is greater than or equal to the length of time of the first set threshold and the length of time is less than or equal to the second set threshold. The first set threshold is greater than the second set threshold.

 Optionally, the measuring unit is specifically configured to:

 Using the first identifier to measure the distance between each of the mount nodes, the distance feature information of each mount node is obtained.

 Optionally, the allocating unit is configured to: sort the distance feature information of each of the mounted nodes according to a preset order; and assign the ordered serial numbers to the respective mounting nodes according to the sorting result of the distance feature information of the mounted nodes.

 Optionally, the sending unit is specifically configured to: send a sequence number to send a command, where the sequence number issuing command includes: a correspondence between a first identifier and an ordered sequence number of each mounted node, so that each of the mounting nodes according to the self The first identifier obtains an ordered sequence number corresponding to the first identifier.

 In the embodiment of the present invention, the control node acquires the first identifier of each of the mounted nodes; the control node separately measures the distance between each of the mounted nodes and the control node according to the first identifier of each of the mounted nodes, and obtains the distance of each of the mounted nodes. Feature information; The control node assigns an ordered sequence number to each of the mount nodes according to the distance feature information of each mount node; the control node sends the ordered sequence number to the corresponding mount node. Therefore, the control node acquires the first identifier of each of the mount nodes, and can learn each mount node in the bus system, and then measure the distance between each mount node and the control node according to the first identifier of each mount node. The distance feature information of each of the mount nodes is assigned an ordered sequence number to each of the mount nodes according to the distance feature information of each mount node, and the ordered sequence number is sent to the corresponding mount node, so that the control node can be based on the mount node. The ordered number is informed of the order in which the mount nodes are arranged on the bus, and the control node is individually communicated with each of the mount nodes. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and other drawings may be obtained from those skilled in the art without departing from the drawings.

 FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention;

 2 is a schematic diagram of a first embodiment of a method for assigning an ordered number to a mount node on a bus according to an embodiment of the present invention;

3 is a second embodiment of a method for assigning an ordered number to a mount node on a bus according to an embodiment of the present invention Schematic diagram

 4 is a schematic diagram of an implementation method of step 301 according to an embodiment of the present invention;

 FIG. 5 is a schematic diagram of an implementation manner of step 305 according to an embodiment of the present invention;

 FIG. 6 is a schematic diagram of an apparatus for assigning an ordered number to a mount node on a bus according to an embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. The following description of the drawings refers to the same or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with aspects of the invention as detailed in the appended claims.

 FIG. 1 is a schematic diagram showing an example of a method and an apparatus for assigning an ordered number to a mount node on a bus according to an embodiment of the present invention. As shown in FIG. 1, the method and apparatus for assigning an ordered number to a mount node on a bus in the embodiment of the present invention may be applied to a bus system, where the bus system includes a control node 110, at least one mount node 120, and a bus 130; The control node 110 communicates with each of the mount nodes 120 via the bus 130, and each of the mount nodes 120 is mounted on the bus 130.

 The bus system can be a 485 bus system.

 Based on the above scenario example, a method for assigning an ordered number to a mount node on a bus in the embodiment of the present invention is described in more detail.

 The ordered number assigned to the mount node in the embodiment of the present invention refers to the number that the control node assigns to each mount node according to the order of the mount nodes on the bus, and uniquely identifies each mount node. The order of the ordered numbers of the mounted nodes corresponds to the order in which the mounted nodes are arranged on the bus, and can represent the relative positional relationship between the mounted nodes and between the control nodes and the mounted nodes; and the ordered number can be used as The communication address at which the mount node communicates with the control node enables separate communication between the control node and the mount node.

 2 is a schematic diagram of a first embodiment of a method for assigning an ordered number to a mount node on a bus according to an embodiment of the present invention, where the method includes:

 Step 201: The control node acquires a first identifier of each mounted node.

 Step 202: The control node separately measures the distance between each of the mounted nodes and the control node according to the first identifier of each of the mounted nodes, and obtains the distance characteristic information of each of the mounted nodes.

Step 203: The control node allocates each of the mount nodes according to the distance feature information of each mount node. Ordered serial number

 Step 204: The control node sends the ordered sequence number to the corresponding mount node.

 In this embodiment, the control node acquires the first identifier of each of the mounted nodes, thereby obtaining each of the mounted nodes in the bus system, and then measuring the relationship between each of the mounted nodes and the control node according to the first identifier of each of the mounted nodes. The distance information of each of the mounted nodes is obtained, and the ordered number is assigned to each of the mounted nodes according to the distance characteristic information of each of the mounted nodes, and the ordered serial number is sent to the corresponding mounting node, so that the control node can The ordered number of the mounted node learns the order of the mounted nodes on the bus, and realizes that the control node communicates with each of the mounted nodes separately. FIG. 3 is a schematic diagram of a first embodiment of a method for assigning an ordered number to a mount node on a bus according to an embodiment of the present invention, where the method includes:

 Step 301: The control node acquires a first identifier of each mounted node.

 The specific implementation of this step will be described in detail in the method flow shown in FIG. 4, and details are not described herein. The first identifier of the mount node may be the information that the mount node uniquely identifies the mount node before being shipped from the factory or used by the user, for example, may be the Sn number of the mount node, etc. . The Sn number can be generally 32-bit coded, and the Sn numbers of different mount nodes are different. In a possible implementation, the first identifier of each of the mount nodes, for example, the Sn number, may be preset in the Flash of the mount node. When the mount node needs to obtain its first identifier, it is from its own Flash. You can read your first ID.

 Through the execution of this step, in a bus system that does not know how many mount nodes are included, and does not know any identification information of each mount node, such as the Sn number, the control node therein acquires all the mount nodes in the bus system. Information, thereby providing basic data for subsequent control nodes to control the mounted nodes in the bus system.

 Step 302: The control node allocates a ranging identifier to each of the mounted nodes, and obtains a correspondence between the first identifier of the mounted node and the ranging identifier.

 The ranging identifier allocated by the control node for each of the mounting nodes can uniquely identify the corresponding mounting node in the bus system, so that the mounting node and the control node cooperate to perform ranging in the ranging process. This step is an optional step. In the actual application, the control node may not allocate a ranging identifier to the mounted node. In the ranging process, the first identifier is directly used to schedule the mounted node.

Generally, the first identifier of the mount node, for example, the general data bit of the Sn number is large, and the bus resource occupied by the mount node corresponding to the first identifier is directly used in the ranging process, and the information transmission time is relatively relatively Long, has a greater impact on ranging efficiency. Therefore, in the embodiment of the present invention, after obtaining the first identifier of each of the mounted nodes, a ranging identifier with a shorter data bit may be allocated for each of the mounted nodes, thereby relatively reducing the occupation in the ranging process. Bus resources, shorten information transmission time, and improve range efficiency.

 In a possible implementation manner, the number of bits of the ranging identifier may be determined according to the number of mounting nodes that obtain the first identifier.

 Step 303: The control node sends a relationship to send a command, where the relationship includes: a correspondence between the first identifier and the ranging identifier;

 When the step 301 is implemented by the method shown in FIG. 4, the step 302 may be performed before the step 407. In this step, the correspondence between the first identifier and the ranging identifier may be carried in the confirmation command and sent to each mount. node.

 Step 304: The mounting node receives the relationship issuing command, and finds its own ranging identifier from the corresponding relationship according to the first identifier of the first node.

 Assume that the corresponding relationship in the command issued by the relationship is as shown in Table 1:

 Table 1

 If the first identifier of the mounted node is AAABBBCC2, the ranging identifier of the mounted node can be obtained from the correspondence of Table 1.

 Step 305: The control node uses the ranging identifier to measure the distance between each of the mounted nodes, and obtains the distance characteristic information of each of the mounted nodes.

 The distance characteristic information of the mounting node is used to represent the distance between the control node and the mounting node. The distance characteristic information may be a parameter that can represent the distance information, such as a distance value, an information transmission time, and a proportional value.

 The information transmission time may be a length of time that the control node detects that the information is sent from the control node to the first mount node, for example, 4s, or may be measured from the control node to the first node. The length of time that the carrier node sends the information to the first mount node feedback information, for example, 8s;

 The distance value may be a physical distance between the control node and the first mount node, for example, 50 m;

The proportional value may be a ratio of the length of the current first mount node measured by the control node to the length of the mount node farthest from the control node, for example, 5%, and the proportional value may also be measured by the control node. The ratio of the length of the current first mount node to the length of the mount node closest to the control node, for example, 3, is not limited in this embodiment of the present invention.

 In the implementation method shown in FIG. 5, the length of time for transmitting information between the control node and the mount node is used as the distance feature information, as shown in FIG. 5, and details are not described herein again.

 Step 306: The control node sorts the distance feature information of each of the mounted nodes according to a preset order. The preset sequence may be ascending or descending, etc., and is not limited herein.

 For example, in the embodiment shown in FIG. 5, the distance characteristic information of each of the mounted nodes is as shown in Table 2. Then, the sorting result shown in Table 3 can be obtained by sorting them in ascending order.

 Table 2

 Step 307: The control node sequentially assigns an ordered sequence number to each of the mounted nodes according to the sorting result of the distance feature information of the mounted node.

 The order of the ordered sequence numbers of the mount nodes and the order of the distance feature information of the mount nodes should generally be the same. Specifically, for the sort result shown in Table 3, assuming that the assigned ordered sequence number is a natural number starting from 1, then the assigned ordered sequence number result can be as shown in Table 4:

 Table 4

 First identifier of the mount node Distance feature information Ordered sequence number

 AAABBBCC1 500ms 1

AAABBBCC5 600ms 2 AAABBBCC3 701ms 3

 AAABBBCC4 803ms 4

 AAABBBCC2 906ms 5

 In practical applications, the control node may fail to obtain the distance feature information of the mounted node. For example, if the first identifier is a mount node of AAABBBCC3, the control node fails to obtain the distance feature information of the mount node. The distance characteristic information in Table 2 and Table 3 is 0. When the embodiment of the present invention allocates an ordered sequence number to the mount node, the mount node can be ignored.

 However, if the mount nodes are known to be equally spaced, in some cases, the distance feature information of the mount nodes that are not acquired by the control node can be inferred from the known distance information of the mount node. For example, if the control node fails to obtain the distance feature information of the mount node whose first identifier is AAABBBCC3, if the known mount nodes are known to be equally spaced, the known distance feature information is 500ms, 600ms, and 803ms, respectively. And 906ms, then obviously there is a failed mount node between the mount node with the first identifier AAABBBCC5 and the mount node with the first identifier AAABBBCC4, and the mount node with the first identifier AAABBBCC3 is obviously located at the first identifier. The mount node of AAABBBCC5 and the mount node whose first identifier is AAABBBCC4; in practical applications, this inference can be done manually, or the conditional judgment of the distance feature information can be automatically completed by the control node, and the specific implementation steps are here. No longer. At this time, the distance feature information of the first node identified as AAABBBCC3 may be added to the corresponding relationship according to the inferred distance feature information. When the ordered node is assigned to the mounted node, the mounted node may or may not be ignored. The mount node is ignored, and the present invention is not limited.

 Step 308: The control node sends a sequence number to send a command, where the sequence number issuing command includes: a correspondence between the first identifier and the ordered sequence number of each of the mounted nodes.

 Step 309: The mounting node receives the serial number issuing command, and obtains its own ordered serial number from the corresponding relationship according to the first identifier of the self.

 In the embodiment of the present invention shown in FIG. 3, after acquiring the first identifier of each of the mounted nodes, the control node allocates a relatively short ranging identifier for each of the mounted nodes, thereby relatively reducing the ranging process. The occupied bus resources, shorten the information transmission time, and improve the ranging efficiency. In the following, FIG. 4 is an example of how the control node obtains the first identifier of the mounted node in step 301. Referring to Figure 4, the method includes:

Step 401: The control node sends a report command, where the report command includes: a report delay generation algorithm identifier. The reporting delay generation algorithm identifier is used to indicate that each of the mount nodes on the bus is used by Report delay generation algorithm. The reason for using the report delay generation algorithm is: When the number of bits of the first identifier is large, if the first identifier is directly used as the delay time, for example, when the first identifier of a mount node is 32-bit 10011000101111011001101010001011, As a delay time, it is 2562562699 ms, which is about 700 hours. This speed collection of the first identifier is obviously unbearable. Therefore, in this embodiment, the reporting delay generation algorithm is used according to the first identifier. The number of bits is less than the conversion value of the first identifier to shorten the delay time of each mount node. For example, when the conversion value obtained by converting the first identifier of a mount node is 10010010, if the delay time is 1 times of the conversion value, the delay time for the mount node to send the first identifier will be shortened. It is 146ms, which is in the normal range.

 For the case where the number of the first identifier is small (for example, 8 bits), the value of the first identifier may be directly used as the delay time, which may be determined according to the number of digits of the first identifier.

 The reporting delay generation algorithm in the embodiment of the present invention may be an algorithm capable of avoiding reporting conflicts, such as a hash algorithm, a set-digit pseudo-random number generation algorithm, and a random back-off algorithm.

 In a possible implementation manner, the above-mentioned time delay generation algorithm is an example of a hash algorithm, and at least one hash algorithm and an identifier of each hash algorithm may be configured in the control node and each of the mount nodes in advance, and then the control is performed in this step. The node can directly indicate the specific hash algorithm to each mount node by using the hash algorithm identifier in the report command. The hash algorithm identifier may be composed of numbers, characters, and the like, and is not limited herein. For example, it can be configured in the control node and each of the mount nodes: the identifier of the hash algorithm 1 is "1", the identifier of the hash algorithm 2 is "2", and the identifier of the hash algorithm 3 is "3", etc., if this step is The hash algorithm identifier included in the report command is "3", indicating that the control node indicates that each mount node on the bus uses the hash algorithm 3.

 The hash algorithm identifier indicated in the reporting command may be determined by the control node, and the specific determining method is not limited, for example, may be randomly determined by the control node, or set a certain order for the hash algorithm identifier, and the hash algorithm is used each time the reporting command is sent. The order of the identification determines the hash algorithm identifier and the like included in the present report command. For example, the order of the hash algorithm is: 1, 3, 2. When the control node sends the report command for the first time, the report command can include the hash algorithm identifier 1. When the control node sends the report command for the second time, the report command can be used. The hash algorithm identifier 3 is included. When the control node sends the report command for the third time, the report command may include the hash algorithm identifier 2, and when the control node sends the report command for the fourth time, the report command may include the hash algorithm identifier 1, and so on.

 The processing steps on each of the mount nodes are described in the following steps 402 to 405. The mount node in step 402 to step 405 can be any mount node mounted on the bus:

Step 402: The mount node receives the report command, and obtains a report delay generation algorithm flag from the report command. Knowledge.

 Step 403: The mounting node obtains the first identifier of the self, and uses the reporting delay generation algorithm indicated by the reporting delay generation algorithm identifier to convert the first identifier to obtain a converted value. The number of converted digits is less than the first digit. The number of digits identified;

 The how to use the reporting delay generation algorithm to convert the first identifier is not described here.

 If the first identifier of the mount node is pre-stored in the Flash of the mount node, the mount node can obtain its first identifier from its own Flash.

 In a possible implementation manner, the first identifier may be a 32-bit Sn number, and the converted value may be a 8-bit value.

 Step 404: The mount node determines, according to the converted value, a delay time for the mount node to send the first identifier. In a possible implementation manner, the mount node may determine a preset multiple of the converted value as the delay time. The preset multiple can be any value greater than 0, and can be set autonomously in practical applications.

 When the preset multiple is 1, the mount node directly determines the converted value as the delay time. Step 405: The mount node sends its first identifier to the control node when receiving the reporting command and starting the timing to the delay time.

 Step 406: The control node receives the first identifier sent by each of the mount nodes.

 Since each of the mount nodes in the method shown in steps 401 to 406 uses the same report delay generation algorithm to perform the conversion of the first identifier, the converted values obtained by the different first identifiers may also be the same. At this time, two or more mount nodes having the same conversion value will simultaneously send the first identifier to the control node through the bus, and may still generate a command collision, so that the control node cannot receive the first identifier sent by the mount nodes, therefore, The embodiment of the present invention may further solve the problem by confirming that the first identifier received in the control node and the control node send the M (M^2) round report command. In this case, the embodiment of the present invention may further include:

 Step 407: The control node sends an acknowledgement command through the bus, where the acknowledgement command includes the received first identifier of each of the mounted nodes.

 Step 408: The mounting node receives the confirmation command, and determines whether the first identifier of the confirmation command is included in the confirmation command. If the command is sent, the first identifier of the control node is not sent. When not included, if the report command sent by the control node is received again, the mount node sends its first identifier to the control node through the bus.

Steps 401 to 408 above are when the control node sends a round of reporting commands, and the control node hangs with each The processing steps between the nodes.

 The control node may also send a second round of reporting commands. In this case, the processing steps between the control node and each of the mounting nodes may refer to steps 402 to 408. The difference is only: 1. The second round of reporting sent by the control node Preferably, the report delay generation algorithm identifier included in the command is different from the report delay generation algorithm identifier included in the first round of the report command; 2. when the second round of the report command is sent, the mount node interacting with the control node Only the mount node that does not include its first identifier in the confirmation command in the first round determines that the mount node including the first identifier of the confirmation command no longer sends the first identifier.

 When the control node sends a report command for each round after the second round, the processing steps between the control node and each of the mount nodes are not repeated here.

 In practical applications, the specific value of M can be set autonomously, and the invention is not limited. Preferably, the reporting delay generation algorithm identifier included in the adjacent two rounds of reporting commands sent by the control node is different.

 Through the above processing, the control node can obtain the first identifier of each mounted node. In the following, the control node uses the ranging identifier to measure the distance between each mounting node in step 305, and obtains an example of the implementation of the distance characteristic information of each mounting node. Referring to FIG. 5, a ranging process between a control node and a certain mounting node is illustrated. In an actual application, the control node sequentially performs the ranging process shown in FIG. 5 with each mounting node by using the ranging identifier, that is, The distance characteristic information of each mount node is obtained. As shown in Figure 5, the method includes:

 Step 501: The control node sends a ranging command to the mounting node, where the ranging command includes a ranging identifier of the mounting node.

 Step 502: After receiving the ranging command, the mounting node immediately sends a reply command to the control node. Step 503: The control node receives the reply command, and determines a length of time from when the ranging command is sent to when the reply command is received. .

 In this step, when the control node determines the length of time, it may be implemented by timing, or may be implemented by measuring the number of pulses.

 Specifically, when implemented by timing, a timer may be set in the control node, starting from the ranging command sent by the control node, and ending when the control node receives the reply command.

 When the number of pulses is measured, the pulse of a certain preset frequency may be preset, the ranging command sent from the control node starts counting, and the control node receives the reply command end counting.

In the mode of measuring the number of pulses, the accuracy of the adjustment time length can be adjusted by adjusting the frequency of the pulse, thereby adjusting the accuracy of the distance characteristic information. Specifically, the higher the frequency of the pulse, the higher the accuracy of the time length. The accuracy of the distance feature information is higher.

 Step 504: The control node determines distance feature information of the mount node according to the length of time.

 The control node may directly determine the length of time as the distance feature information of the mount node. In another implementation manner, the control node may repeatedly perform step 501 to step 503 N times to obtain N time lengths of the mounted node. N is an integer greater than or equal to 2. The specific value of the N may be set autonomously in an actual application, and is not limited herein.

 At this time, step 504 can include:

 The control node filters the obtained N time lengths;

 The control node performs statistical calculation according to the filtering result, and obtains a statistical value of the length of time, and determines the statistical value of the time length as the distance characteristic information of the mounted node.

 Optionally, for the N time lengths, the control node may remove the time length in which the value is greater than or equal to the first set threshold, and the time length in which the value is less than or equal to the second set threshold, thereby implementing the filtering process, where The first set threshold is greater than the second set threshold. The specific value of the first setting threshold is greater than the specific value of the second setting threshold, which can be set autonomously in practical applications, and is not limited herein.

 For example, assuming N=5, the five time lengths obtained by the control node are: 508ms, 501ms, 498ms,

492ms and 501ms, the first set threshold is 508ms, the second set threshold is 492ms, the shell lj, the value is greater than or equal to 508ms and the value is less than or equal to 492ms, the filtering process is completed, and the filtering result is: 501ms, 498ms Mouth 501ms.

 The control node performs statistical calculation according to the filtering result, and obtains a statistical value of the length of time;

 The statistical calculations here can be arithmetic calculations, geometric mean calculations, calculations based on weight coefficients, and so on.

 Still taking step 504 as an example, the filtering results are 501ms, 498ms, and 501ms. If the arithmetic average calculation is used here, the average value of the calculated time length is: (501+498+501) /3=500ms.

 Through the above processing, the control node can obtain the distance characteristic information of each mounted node. 6 is a schematic structural diagram of an apparatus for assigning an ordered number to a mount node on a bus according to an embodiment of the present invention. The apparatus may be applied to a control node in a bus system, and the mount node in the control node and the bus system. Communicating through the bus; the device 600 includes:

 The obtaining unit 610 is configured to obtain a first identifier of each of the mounted nodes.

The measuring unit 620 is configured to separately measure the distance between each of the mounting nodes and the control node according to the first identifier of each of the mounting nodes, and obtain distance characteristic information of each of the mounting nodes; The allocating unit 630 is configured to allocate an ordered sequence number to each of the mounted nodes according to the distance feature information of each of the mounted nodes;

 The sending unit 640 is configured to send the ordered sequence number to the corresponding mount node.

 Optionally, the obtaining unit 610 may be specifically configured to:

 Sending a report command, the report command is used to instruct each of the mount nodes to report the first identifier, where the report command includes a report delay generation algorithm identifier, and the report delay generation algorithm identifier is used to indicate that each mount node reports An reporting delay generation algorithm used for identifying, so that each of the mounting nodes determines the delay time for sending the first identifier by itself;

 Receiving a first identifier sent by each of the mount nodes;

 And sending a confirmation command, where the confirmation command includes a first identifier received by the control node after the sending the report command, so that each of the mount nodes confirms whether the control node receives its first identifier.

 Optionally, the obtaining unit 610 is further specifically configured to:

 After the confirmation command is sent, the next round of the reporting command is sent; the reporting delay generation algorithm identifier included in the adjacent two rounds of reporting commands is different; receiving the first identifier sent by the mounting node that is not confirmed by the control node; sending a confirmation command The confirmation command includes the first identifier received by the control node after sending the reporting command of the next round.

 Optionally, the measuring unit 620 may include:

 An allocation subunit, configured to allocate a ranging identifier to each of the mount nodes;

 a sending subunit, configured to send a correspondence between the first identifier and the ranging identifier, so that each of the mounting nodes obtains its own ranging identifier according to the first identifier of the first loading node;

 And a measuring subunit, configured to measure a distance between each of the mounting nodes by using the ranging identifier, and obtain distance characteristic information of each of the mounting nodes.

 Optionally, the measuring subunit may be specifically configured to: send a ranging command to each of the mounting nodes, where the ranging command includes a ranging identifier of the mounting node; and determine to send a ranging command to receive The length of the reply command to the mount node; determining the distance feature information of the mount node according to the length of time.

 Optionally, the measuring subunit may be further configured to: repeatedly perform the step of transmitting the ranging command N-1 times and determining the length of time, and obtain N time lengths corresponding to the respective mounting nodes; An integer equal to 2; filtering the obtained N time lengths; performing statistical value calculation according to the filtering result, obtaining a statistical value of the length of time, and determining the statistical value of the time length as the distance characteristic information of the mounted node.

Optionally, the measuring subunit may be further configured to: remove, for the N time lengths, a first quantity of time length in which the value is the largest and a second quantity of time length in which the value is the smallest, the first quantity And the sum of the second quantity is less than ?.

 The measuring unit 620 may be specifically configured to: use the first identifier to measure a distance between each of the mounting nodes, and obtain distance feature information of each of the mounting nodes.

 Optionally, the allocating unit 630 may be specifically configured to: sort the distance feature information of each of the mounted nodes according to a preset order; and sequentially assign the ordered nodes to the mounted nodes according to the sorting result of the distance feature information of the mounted node. Serial number.

 Optionally, the sending unit is specifically configured to: send a sequence number to send a command, where the sequence number issuing command includes: a correspondence between a first identifier of each mounted node and an ordered sequence number, so that each of the mounting nodes is configured according to The first identifier of the first identifier is obtained by the first identifier corresponding to the first identifier.

 In this embodiment, the device acquires the first identifier of each of the mounted nodes, thereby learning each of the mounted nodes in the bus system, and then measuring the relationship between each of the mounted nodes and the control node according to the first identifier of each of the mounted nodes. The distance information of each of the mounted nodes is obtained, and the ordered number is assigned to each of the mounted nodes according to the distance characteristic information of each of the mounted nodes, and the ordered serial number is sent to the corresponding mounting node, so that the control node can According to the ordered number of the mount node, the order of the mount nodes on the bus is known, and the separate communication between the control node and each mount node is realized. It will be apparent to those skilled in the art that the techniques in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on such understanding, the technical solution in the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product, and the computer software product may be stored in a storage medium such as a ROM/RAM. , a diskette, an optical disk, etc., comprising instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or in certain portions of the embodiments.

 The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

 The embodiments of the present invention described above are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

^ ^  What is claimed is: 1. A method for assigning an ordered number to a mount node on a bus, the method comprising: applying to a bus system, the bus system comprising a control node and at least one mount node, the control node and the mount The nodes communicate via the bus; the method includes:  The control node acquires a first identifier of each mounted node;  The control node separately measures the distance between each of the mounted nodes and the control node according to the first identifier of each of the mounted nodes, and obtains the distance characteristic information of each of the mounted nodes;  The control node assigns an ordered sequence number to each of the mount nodes according to the distance feature information of each mount node; the control node sends the ordered sequence number to the corresponding mount node.  The method according to claim 1, wherein the control node acquires the first identifier of each of the mount nodes, including:  The control node sends a report command, where the report command is used to indicate that each of the mount nodes reports the first identifier, and the report command includes the report delay generation algorithm identifier, where the report delay generation algorithm identifier is used to indicate each mount node. The reporting delay generation algorithm used when reporting the first identifier, so that each of the mount nodes determines the delay time for sending the first identifier by itself;  The control node receives the first identifier sent by each of the mount nodes;  The control node sends an acknowledgement command, where the acknowledgement command includes a first identifier received by the control node after the report command is sent, so that each mount node confirms whether the control node receives its first identifier.  The method according to claim 2, wherein after the control node sends the confirmation command, the method further includes:  The control node sends a report of the report of the next round; the report of the report delay generation algorithm included in the report of the two adjacent rounds is different;  The control node receives the first identifier sent by the mount node that is confirmed by the control node; the control node sends an acknowledgement command, where the acknowledgement command includes the first identifier received by the control node after sending the report command of the next round.  The method according to any one of claims 1 to 3, wherein the control node separately measures the distance between each of the mount nodes and the control node according to the first identifier of each of the mount nodes, and obtains each mount node. Distance characteristic information, including: The control node allocates a ranging identifier to each of the mounting nodes, and sends a correspondence between the first identifier and the ranging identifier, so that each of the mounting nodes obtains its own ranging identifier according to the first identifier of the mounting node; The control node uses the ranging identifier to measure the distance between each of the mounted nodes, and obtains the distance characteristic information of each of the mounted nodes.  The method according to claim 4, wherein the control node uses the ranging identifier to measure the distance between each of the mounted nodes, and obtains the distance characteristic information of each of the mounted nodes, including: a load node command, where the control node sends a ranging command, where the ranging command includes a ranging identifier of the mount node;  The control node determines a length of time from the sending of the ranging command to the receipt of the reply command of the mount node;  The control node determines distance feature information of the mount node according to the length of time.  The method according to claim 5, wherein the control node uses the ranging identifier to measure the distance between each of the mounted nodes, and obtains the distance characteristic information of each of the mounted nodes, and further includes: Repeating the steps of transmitting the ranging command for N-1 times and determining the length of time, and obtaining N time lengths corresponding to the respective mounting nodes; N is an integer greater than or equal to 2;  Determining the distance characteristic information of the mounting node according to the length of time includes: the control node filtering the obtained N time lengths;  The control node performs statistical value calculation according to the filtering result, obtains a statistical value of the length of time, and determines the statistical value of the length of time as the distance characteristic information of the mounted node.  The method according to claim 6, wherein the control node performs filtering processing on the obtained N time lengths, including:  For the N time lengths, the control node removes a time length in which the value is greater than or equal to the first set threshold and a time length in which the value is less than or equal to the second set threshold, where the first set threshold is greater than the second setting Threshold.  The method according to any one of claims 1 to 3, wherein the control node separately measures the distance between each of the mount nodes and the control node according to the first identifier of each of the mount nodes, and obtains each mount node. Distance characteristic information, including:  The control node uses the first identifier to measure the distance between each of the mount nodes, and obtains the distance feature information of each of the mount nodes.  The method according to any one of claims 1 to 8, wherein the control node assigns an ordered sequence number to each of the mount nodes according to the distance feature information of each of the mount nodes, including: The control node sorts the distance feature information of each of the mounted nodes according to a preset order; the control node sequentially assigns an ordered sequence number to each of the mounted nodes according to the sorting result of the distance feature information of the mounted nodes. The method according to any one of claims 1 to 9, wherein the control node sends the ordered sequence number to the corresponding mount node, including:  The control node sends a sequence number to send a command, where the sequence number issuing command includes: a correspondence between the first identifier and the ordered sequence number of each of the mounted nodes, so that each of the mount nodes obtains the first identifier according to the first identifier of the first node. Ordered serial number. 11. An apparatus for assigning an ordered number to a mount node on a bus, characterized in that it is applied to a control node in a bus system, and the control node communicates with a mount node in the bus system via a bus; The device includes:  An obtaining unit, configured to acquire a first identifier of each mounted node;  a measuring unit, configured to respectively measure a distance between each of the mounting nodes and the control node according to the first identifier of each of the mounting nodes, to obtain distance characteristic information of each of the mounting nodes;  An allocating unit, configured to allocate an ordered serial number to each of the mounted nodes according to the distance characteristic information of each of the mounted nodes;  And a sending unit, configured to send the ordered sequence number to the corresponding mount node.  The device according to claim 11, wherein the acquiring unit is specifically configured to: send a report command, where the report command is used to instruct each of the mount nodes to report the first identifier, and the report command includes the report a delay generation algorithm identifier, where the report delay generation algorithm identifier is used to indicate a report delay generation algorithm used by each of the mount nodes to report the first identifier, so that each mount node determines a delay time for sending the first identifier by itself;  Receiving a first identifier sent by each of the mount nodes;  Sending a confirmation command, where the confirmation command includes a first identifier received by the control node after sending the report command, so that each of the mount nodes confirms whether the control node receives its first identifier.  The device according to claim 12, wherein the acquiring unit is further configured to: after sending the confirmation command, send a report command of the next round; and generate a report delay generation algorithm included in the report of the two adjacent rounds of reporting The identifier is different; receiving the first identifier sent by the mount node that is not confirmed by the control node; and sending a confirmation command, where the confirmation command includes the first identifier received by the control node after sending the report command of the next round.  The device according to any one of claims 11 to 13, wherein the measuring unit comprises:  An allocation subunit, configured to allocate a ranging identifier to each of the mount nodes; a sending subunit, configured to send a correspondence between the first identifier and the ranging identifier, so that each mounting The node obtains its own ranging identifier according to its first identifier;  And a measuring subunit, configured to measure a distance between each of the mounting nodes by using the ranging identifier, and obtain distance characteristic information of each of the mounting nodes.  The device according to claim 14, wherein the measuring subunit is specifically configured to: send a ranging command to each of the mounting nodes, where the ranging command includes ranging of the mounting node Determining: determining a length of time from the sending of the ranging command to receiving the reply command of the mounting node; determining the distance characteristic information of the mounting node according to the length of time.  The device according to claim 15, wherein the measuring subunit is further configured to: repeatedly perform the step of transmitting the ranging command N-1 times and determining the length of time, and obtain each of the mounting nodes. Corresponding N time lengths; N is an integer greater than or equal to 2; filtering the obtained N time lengths; performing statistical value calculation according to the filtering result, obtaining a statistical value of the length of time, and determining the statistical value of the time length The distance characteristic information of the mount node.  The device according to claim 16, wherein the measuring subunit is further configured to: remove, for the N time lengths, a length of time in which the value is greater than or equal to the first set threshold, and the value is less than or equal to The second set threshold is for a length of time, and the first set threshold is greater than the second set threshold.  The device according to any one of claims 11 to 13, wherein the measuring unit is specifically configured to:  Using the first identifier to measure the distance between each of the mount nodes, the distance feature information of each mount node is obtained.  The device according to any one of claims 11 to 18, wherein the allocating unit is specifically configured to: sort the distance feature information of each of the mounting nodes according to a preset order; according to the distance of the mounting node The sorting result of the feature information sequentially assigns an ordered sequence number to each of the mount nodes.  The device according to any one of claims 11 to 19, wherein the sending unit is specifically configured to: send a serial number issuing command, where the serial number issuing command includes: a first of each mounting node Corresponding relationship between the identifier and the ordered sequence number, so that each of the mount nodes obtains the ordered sequence number corresponding to the first identifier according to the first identifier of the first identifier.