Rail logistics wireless communication scheduling method and system

Abstract

The invention discloses a track logistics wireless communication scheduling method and system, the system comprises a scheduling server, a plurality of area controllers and a plurality of trolleys, the scheduling server sends logistics tasks to the area controllers, each area controller corresponds to one frequency band, and a plurality of labels are arranged on the motion trail of the trolleys; the regional controller broadcasts a logistics task, the target trolley executes the logistics task after receiving the logistics task, and when the target trolley passes through any label, the communication frequency band is switched to the frequency band corresponding to the label, and the target trolley communicates with the regional controller corresponding to the frequency band until the target trolley executes the logistics task completely. According to the invention, the scheduling server and the area controller are arranged to control the trolley, and the label is utilized to indicate the trolley to carry out frequency band switching, so that logistics scheduling control is carried out in a modularized subsection manner, and the problems of low scheduling communication efficiency and low integration degree of existing rail logistics communication are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of logistics scheduling, and particularly to a wireless communication scheduling method and system for rail logistics. Background Art

[0002] In a rail logistics system, a logistics trolley needs to communicate with a scheduling center through communication to achieve the scheduling of the logistics trolley to different destination nodes. The existing traditional solutions mainly include two categories. The first category uses a wired method to achieve communication between the trolley and the scheduling center. In such a system, copper rails need to be deployed throughout the system, with high cost, complex installation. The copper rails will oxidize over time, affecting communication and requiring regular maintenance. The second category is to use the network (LTE) provided by an operator to form a network throughout the system, which faces the problems of additional payment and possible lack of operator network coverage on site. In addition, there are also problems of too many nodes, slow communication rate, and mutual interference, which is not conducive to system modular integration.

[0003] Therefore, there is a need for a solution that can solve the problems of low communication efficiency and low integration level in the existing rail logistics communication scheduling. Summary of the Invention

[0004] To solve the above problems, the present invention provides a wireless communication scheduling method and system for rail logistics, which controls the trolley by setting a scheduling server and area controllers, and uses tags to indicate the trolley to perform frequency band switching, so as to perform logistics scheduling control in a modular manner, and solves the problems of low communication efficiency and low integration level in the existing rail logistics communication scheduling.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A wireless communication scheduling method for rail logistics, including a scheduling server, a plurality of area controllers and a plurality of trolleys, comprising the following steps:

[0007] S1. The scheduling server sends a logistics task to the area controller. The logistics task corresponds to one or more trolleys, and the one or more trolleys corresponding to the logistics task are the target trolleys of the logistics task. Each area controller corresponds to an area, and each area controller controls all the trolleys within its corresponding area. Each area controller corresponds to a frequency band, and the frequency bands of each area controller are different from each other. A plurality of tags are set on the movement track of the trolley, and each tag corresponds to a frequency band;

[0008] S2. The area controller broadcasts the logistics task to all the trolleys within its control area, and the target trolley responds to the area controller after receiving the logistics task;

[0009] S3. The target trolley executes a logistics task. When the target trolley passes by any tag, the target trolley identifies the passed tag, switches the communication frequency band to the frequency band corresponding to the passed tag, communicates with the area controller corresponding to this frequency band, and this area controller obtains the logistics task executed by the target trolley;

[0010] S4. The target trolley repeats step S3 until the target trolley finishes executing the logistics task.

[0011] Further, the trolley communicates with the area controller through a wireless communication module. The scheduling server communicates with the area controller through a remote communication protocol, and the area controllers communicate with each other through a remote communication protocol.

[0012] Further, in step S4, when the target trolley reaches the transportation end point of the logistics task, the logistics task is completed.

[0013] Further, the target trolley communicates with only a single area controller at the same time.

[0014] Further, the tag consists of three parts, including a preamble, a first frequency band, and a second frequency band. The preamble is used to identify the tag function. The first frequency band and the second frequency band are different from each other. The area controller to which the first frequency band belongs and the area controller to which the second frequency band belongs are different from each other;

[0015] The tag includes a one-way tag and a two-way tag. When the target trolley identifies a one-way tag, the communication frequency band of the target trolley can only be switched from the first frequency band to the second frequency band. When the trolley identifies a two-way tag, the communication frequency band of the target trolley can both be switched from the first frequency band to the second frequency band and from the second frequency band to the first frequency band.

[0016] Further, when the trolley identifies a two-way tag and can both be switched from the first frequency band to the second frequency band and from the second frequency band to the first frequency band, the specific implementation method includes: the first frequency band corresponds to the first area controller, and the second frequency band corresponds to the second area controller. The frequency band is switched according to the direction of the logistics task executed by the trolley. When the trolley travels from the area corresponding to the first area controller to the area corresponding to the second area controller, the trolley switches the communication frequency band to the second frequency band. When the trolley travels from the area corresponding to the second area controller to the area corresponding to the first area controller, the trolley switches the communication frequency band to the first frequency band;

[0017] It also includes: switching the frequency band according to the current communication frequency band of the trolley. When the communication frequency band of the trolley belongs to the first frequency band, the communication frequency band of the trolley is switched to the second frequency band. When the communication frequency band of the trolley belongs to the second frequency band, the communication frequency band of the trolley is switched to the first frequency band.

[0018] Further, the corresponding frequency bands of two adjacent area controllers are discontinuous.

[0019] Further, in step S3, communicating with the area controller corresponding to the frequency band further includes:

[0020] The area controller corresponding to the target trolley before switching the communication frequency band is the leading area controller, and the area controller corresponding to the target trolley after switching the communication frequency band is the trailing area controller. The target trolley sends an instruction code to the trailing area controller, and the trailing area controller parses the instruction code to obtain the current communication frequency band of the target trolley;

[0021] The target trolley returns data to the trailing area controller, and the trailing area controller inversely deduces the frequency band through the received data.

[0022] Further, in step S1, several tags are arranged on the movement track of the trolley, and it further includes:

[0023] Multi-tag redundancy setting, the tags are arranged between the areas controlled by two area controllers, and more than one same tag is set at the same position.

[0024] Through the above technical solutions, the present invention has the following beneficial effects: Based on the task direction, label frequency band identification, and real-time position confirmation, precise frequency band switching is realized; the frequency band switching is synchronized with the task instruction, improving the system efficiency, applicable to multi-functional scenarios, and improving the reliability, communication efficiency, and intelligent scheduling ability of the rail logistics system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall process of a rail logistics wireless communication scheduling method of the present invention.

[0026] Figure 2 It is a schematic diagram of the structure of a rail logistics wireless communication scheduling system in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] See Figure 1 , a wireless communication scheduling method for track logistics, including a scheduling server, several regional controllers and several trolleys, comprising the following steps:

[0031] S1. The scheduling server sends a logistics task to the regional controller. The logistics task corresponds to one or more trolleys, and the one or more trolleys corresponding to the logistics task are the target trolleys of the logistics task. Each regional controller corresponds to a region, and each regional controller controls all trolleys within its corresponding region. Each regional controller corresponds to a frequency band, and the frequency bands of each regional controller are different from each other. A number of tags are set on the movement track of the trolley, and each tag corresponds to a frequency band;

[0032] S2. The regional controller broadcasts the logistics task to all trolleys within its control area. After receiving the logistics task, the target trolley responds to the regional controller;

[0033] S3. The target trolley executes the logistics task. When the target trolley passes by any tag, the target trolley identifies the passed tag, switches the communication frequency band to the frequency band corresponding to the passed tag, and communicates with the regional controller corresponding to the frequency band. The regional controller obtains the logistics task executed by the target trolley;

[0034] S4. The target trolley repeats step S3 until the target trolley finishes executing the logistics task.

[0035] In an optional embodiment, the trolley communicates with the regional controller through a wireless communication module. The scheduling server and the regional controller communicate through a remote communication protocol, and the regional controllers communicate with each other through a remote communication protocol.

[0036] Specifically, the wireless communication module includes a LoRa module or a Zigbee module, and the remote communication protocol includes a TCP / IP protocol.

[0037] Using the LoRa module for communication can perform frequency division communication to ensure that the communication between different regions is isolated from each other. The regional controller only communicates with the trolleys within the region, avoiding the mutual influence of communication between different regions. In addition, the LoRa module has low power consumption, which can extend the battery life of the trolley, and the LoRa signal can penetrate buildings and obstacles, which enables it to maintain stable communication in complex environments.

[0038] Specifically, the regional controller is provided with a LoRa module, and each LoRa module at the regional controller end is provided with several MIMO antennas. Each trolley is provided with a LoRa module to communicate with the LoRa module at the regional controller end.

[0039] Using the TCP / IP protocol can achieve concurrent communication between regions and between the server and regions, avoid communication interference, and ensure communication efficiency.

[0040] In an optional embodiment, the target trolley communicates with only a single area controller at the same time.

[0041] When the target trolley responds to the area controller, the area controllers broadcast to each other to stop broadcasting the logistics task. The target trolley only communicates with the responding area controller, returns to the communication frequency band, and the area controller only sends the data to the LoRa module corresponding to this communication frequency band, and no longer sends the data corresponding to the logistics task on other frequency bands.

[0042] In an optional embodiment, in step S4, when the target trolley reaches the transportation end point of the logistics task, the logistics task is completed.

[0043] In an optional embodiment, the tag consists of three parts, including a preamble, a first frequency band, and a second frequency band. The preamble is used to identify the tag function. The first frequency band and the second frequency band are different from each other, and the area controller to which the first frequency band belongs is different from the area controller to which the second frequency band belongs;

[0044] The tag includes several functions, which are identified in the preamble. The functions include position identification, speed identification, etc. The trolley passes by and scans the tag, and executes the corresponding function according to the preamble identification.

[0045] The tag includes a one-way tag and a two-way tag. When the target trolley recognizes the one-way tag, the communication frequency band of the target trolley can only be switched from the first frequency band to the second frequency band. When the trolley recognizes the two-way tag, the communication frequency band of the target trolley can not only be switched from the first frequency band to the second frequency band, but also be switched from the second frequency band to the first frequency band.

[0046] By flexibly setting the one-way and two-way tags, according to different application scenarios and requirements, the most suitable tag type is selected to optimize the communication process, limit the frequency band switching of the trolley. For example, one-way or two-way tags are flexibly set between multiple adjacent regions to avoid the trolley from wrongly switching to a non-traveling direction area, optimize resource allocation, and ensure the resources and bandwidth of the critical path.

[0047] In an optional embodiment, when the trolley recognizes a bidirectional tag, it can switch from the first frequency band to the second frequency band and also from the second frequency band to the first frequency band. The specific implementation method includes: the first frequency band corresponds to the first area controller, and the second frequency band corresponds to the second area controller. The frequency band is switched according to the direction of the logistics task executed by the trolley. When the trolley travels from the area corresponding to the first area controller to the area corresponding to the second area controller, the trolley switches the communication frequency band to the second frequency band. When the trolley travels from the area corresponding to the second area controller to the area corresponding to the first area controller, the trolley switches the communication frequency band to the first frequency band;

[0048] It also includes: switching the frequency band according to the current communication frequency band of the trolley. When the communication frequency band of the trolley belongs to the first frequency band, the communication frequency band of the trolley is switched to the second frequency band. When the communication frequency band of the trolley belongs to the second frequency band, the communication frequency band of the trolley is switched to the first frequency band.

[0049] In an optional embodiment, the frequency bands corresponding to two adjacent area controllers are discontinuous, avoiding communication interference caused by the boundary of continuous frequency bands. Since the frequency bands are discontinuous, the frequency points used in adjacent areas do not overlap, which can significantly reduce co-channel interference and improve communication reliability and communication efficiency.

[0050] In an optional embodiment, in step S3, communicating with the area controller corresponding to the frequency band further includes:

[0051] The area controller corresponding to the target trolley before switching the communication frequency band is the preceding area controller, and the area controller corresponding to the target trolley after switching the communication frequency band is the succeeding area controller. The target trolley sends an instruction code to the succeeding area controller, and the succeeding area controller parses the instruction code to obtain the current communication frequency band of the target trolley;

[0052] The target trolley returns data to the succeeding area controller, and the succeeding area controller deduces the frequency band from the received data.

[0053] In an optional embodiment, in step S1, several tags are arranged on the movement trajectory of the trolley, and it also includes:

[0054] Multi-tag redundancy setting. The tags are arranged between the areas controlled by two area controllers. More than one identical tag is set at the same position, and multiple identical frequency band switching tags are set at the position where the trolley needs to switch the frequency band to increase the redundancy error correction mechanism and avoid the trolley from missing reading or missing scanning.

[0055] If the trolley misses reading the frequency band switching tag but can still communicate with the LoRa module of the previous area controller, the LoRa module of the previous area controller corrects the communication frequency band of the trolley through a special instruction.

[0056] If the trolley misses reading a tag and the previous LoRa module cannot communicate, when the previous LoRa module controls the trolley, it sends an instruction in advance to indicate that when the trolley reads a subsequent specific tag, it automatically switches to the specified frequency band, without having to fixedly read a certain frequency band to switch the frequency band of the tag.

[0057] Example 2

[0058] See Figure 2 , an orbital logistics wireless communication scheduling system, including a scheduling server, several regional controllers and several trolleys,

[0059] The scheduling server is used to send logistics tasks to all regional controllers. The logistics tasks correspond to one or more trolleys, and the one or more trolleys corresponding to the logistics task are the target trolleys of the logistics task.

[0060] The regional controller is used to control a region and all trolleys within the region. Each regional controller corresponds to a region. Each regional controller controls all trolleys within its corresponding region. Each regional controller corresponds to a frequency band, and the frequency bands of each regional controller are different from each other. The regional controller broadcasts logistics tasks to all trolleys within its controlled region, and the regional controllers communicate with each other to obtain logistics tasks.

[0061] The trolley is used to execute logistics tasks. Several tags are set on the movement track of the trolley. Each tag corresponds to a frequency band. After receiving the logistics task, the target trolley responds to the regional controller. When the target trolley passes by any tag during the execution of the logistics task, the target trolley identifies the passed tag, and the target trolley switches the communication frequency band to the frequency band corresponding to the passed tag and communicates with the regional controller corresponding to that frequency band.

[0062] The embodiments disclosed in this specification are only an illustration of the unilateral features of the present invention. The protection scope of the present invention is not limited to this embodiment, and any other functionally equivalent embodiments fall within the protection scope of the present invention. For those skilled in the art, various corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims

1. A rail logistics wireless communication dispatching method, comprising a dispatching server, a plurality of regional controllers and a plurality of trolleys, characterized in that: The following steps are involved: S1. The dispatch server sends a logistics task to the regional controller. The logistics task corresponds to one or more vehicles. The logistics task corresponds to one or more vehicles as the target vehicles of the logistics task. Each regional controller controls an area and all vehicles in the area. Each regional controller corresponds to a frequency band. The frequency bands of each regional controller are different. Several labels are set on the vehicle's motion trajectory, and each label corresponds to a frequency band. S2. The regional controller broadcasts the logistics task to all vehicles in its control area, and the target vehicle responds to the regional controller after receiving the logistics task; S3. The target car performs a logistics task. When the target car passes through any tag, the target car identifies the passing tag, switches the communication frequency band to the frequency band corresponding to the passing tag, and communicates with the regional controller corresponding to the frequency band. The regional controller obtains the logistics task performed by the target car; S4. The target vehicle repeats step S3 until the target vehicle completes the logistics task.

2. A rail logistics wireless communication scheduling method according to claim 1, characterized in that: The trolley communicates with the regional controller via a wireless communication module, the dispatch server communicates with the regional controller via a remote communication protocol, and the regional controllers communicate with each other via a remote communication protocol.

3. A rail logistics wireless communication scheduling method according to claim 1, characterized in that: The logistics task includes a transportation destination. In step S4, when the target vehicle reaches the transportation destination of the logistics task, the logistics task is completed.

4. A rail logistics wireless communication scheduling method according to claim 1, characterized in that: The target vehicle communicates with only a single zone controller at a time.

5. A rail logistics wireless communication scheduling method according to claim 1, characterized in that: The tag is composed of three parts, including a preamble, a first frequency band, and a second frequency band. The preamble is used to identify the tag function. The first frequency band and the second frequency band are different from each other. The regional controller to which the first frequency band belongs and the regional controller to which the second frequency band belongs are different from each other. The tags include unidirectional tags and bidirectional tags. When the target vehicle recognizes a unidirectional tag, the communication frequency band of the target vehicle can only be switched from the first frequency band to the second frequency band. When the vehicle recognizes a bidirectional tag, the communication frequency band of the target vehicle can be switched from the first frequency band to the second frequency band, or from the second frequency band to the first frequency band.

6. A rail logistics wireless communication scheduling method according to claim 5, characterized in that: When the car recognizes a bidirectional tag, it can switch from the first frequency band to the second frequency band, or from the second frequency band to the first frequency band. The specific implementation method includes: the first frequency band corresponds to the first regional controller, the second frequency band corresponds to the second regional controller, and the frequency band is switched according to the direction of the logistics task performed by the car. When the car moves from the area corresponding to the first regional controller to the area corresponding to the second regional controller, the car switches the communication frequency band to the second frequency band, and when the car moves from the area corresponding to the second regional controller to the area corresponding to the first regional controller, the car switches the communication frequency band to the first frequency band; It also includes: switching the frequency band according to the current communication frequency band of the car. When the communication frequency band of the car belongs to the first frequency band, the communication frequency band of the car is switched to the second frequency band. When the communication frequency band of the car belongs to the second frequency band, the communication frequency band of the car is switched to the first frequency band.

7. A rail logistics wireless communication scheduling method according to claim 1, characterized in that: The corresponding frequency bands of two adjacent regional controllers are not continuous.

8. A rail logistics wireless communication scheduling method according to claim 1, characterized in that: In step S3, the communicating with the regional controller corresponding to the frequency band further includes: The regional controller corresponding to the target car before switching the communication frequency band is the leading regional controller, and the regional controller corresponding to the target car after switching the communication frequency band is the trailing regional controller. The target car sends a command code to the trailing regional controller, and the trailing regional controller parses the command code, obtains the current communication frequency band of the target car, and communicates with the target car. The method also includes: the target vehicle returns data to the rear area controller, and the rear area controller infers the frequency band through the received data to communicate with the target vehicle.

9. A rail logistics wireless communication scheduling method according to claim 1, characterized in that: In step S1, a plurality of tags are set on the motion track of the vehicle, and also includes: Multiple labels are set redundantly, and the labels are set between the areas controlled by two area controllers, and more than one identical label is set at the same position.

10. A rail logistics wireless communication dispatching system, comprising a dispatching service module, several regional control modules and several trolleys, characterized in that: The dispatch service module is used to send a logistics task to the regional control module. The logistics task corresponds to one or more vehicles. The logistics task corresponds to one or more vehicles as the target vehicles of the logistics task. The regional control module is used to control an area and all the vehicles in the area. Each regional control module controls an area and all the vehicles in the area. Each regional control module corresponds to a frequency band, and the frequency bands of each regional control module are different. The regional control module broadcasts logistics tasks to all the vehicles in its control area, and the regional control modules communicate with each other to obtain logistics tasks. The car is used to perform logistics tasks. Several tags are set on the movement track of the car, and each tag corresponds to a frequency band. After receiving the logistics task, the target car responds to the regional control module. When the target car passes through any tag while performing the logistics task, the target car identifies the passing tag, and the target car switches the communication frequency band to the frequency band corresponding to the passing tag, and communicates with the regional control module corresponding to the frequency band.

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