CN112954658B - Business card system suitable for data exchange of communication protocol layer and data exchange method - Google Patents
Business card system suitable for data exchange of communication protocol layer and data exchange method Download PDFInfo
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- 238000004891 communication Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims description 32
- 230000004044 response Effects 0.000 claims abstract description 30
- 238000007781 pre-processing Methods 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 4
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- 238000013461 design Methods 0.000 description 2
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- 230000004888 barrier function Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/005—Discovery of network devices, e.g. terminals
Abstract
The invention provides a business card system suitable for data exchange of communication protocol layer, comprising: the preview business card is used for verifying whether data exchange is needed between two non-homologous devices; the request business card is used for requesting to execute related functions on other homologous or non-homologous equipment; and the response business card is used for replying the function related result requested by the requester. The invention adopts a business card system on a communication protocol layer, carries out business card exchange pretreatment between devices through previewing business cards, requests business card exchange and answers the business cards to complete attribute and function description of the devices, requests functions of related devices and acquires the function states of the related devices, so that non-homologous devices are connected with each other, and the transmission data formats of the devices are kept consistent.
Description
Technical Field
The invention relates to the technical field of Internet of things, in particular to a business card system suitable for data exchange of a communication protocol layer and a data exchange method.
Background
In recent years, the technology of the internet of things is rapidly developed and widely applied to production and life of people. Firstly, with the appearance of new equipment types and operating systems, the heterogeneity of the equipment of the Internet of things is stronger and stronger; secondly, the application of the internet of things is more and more complex, and one application of the internet of things usually comprises a plurality of heterogeneous internet of things devices. In the large market environment, after experiencing a sudden epidemic situation, the public demand for non-contact operation and non-sensitive operation is increased. On the consumer level, the important hindering factor for using the smart home product is the lack of compatibility among the existing brands, and the brands cannot be communicated with each other, so that so-called 'information islands' are formed.
Interconnection and intercommunication are realized, and one realization mode is to establish standardization. And equipment standardized interfaces are unified, and cross-platform and cross-manufacturer network access intercommunication cooperation of different equipment is realized. On one hand, each manufacturer device realizes information (user management, safety management, device management, state feedback and the like) intercommunication with the cloud server platform resource manager through a standardized interface by means of a local gateway, and the control terminal pulls device-related information resources (device functions, device IDs, device manufacturer information and the like) from the cloud resource manager, so that the control of the device is realized. On the other hand, some devices can also access the Internet (such as ZigBee, bluetooth and the like) in a protocol conversion bridging mode.
The standardized construction of the internet of things is a long way, and the cloud-end mode cannot guarantee real-time performance and can introduce a platform problem. Meanwhile, the data management and communication management parts of the method are processed by an application layer, and a new barrier is generated for practical development.
Therefore, in order to solve the problems in the prior art that non-homologous devices cannot be connected to each other, and transmission data formats of the devices are not consistent and cannot be analyzed and utilized by other devices, a business card system and a data exchange method suitable for data exchange of a communication protocol layer are needed.
Disclosure of Invention
It is an object of the present invention to provide a business card system adapted for communication protocol layer data exchange, said business card system comprising:
the preview business card is used for verifying whether data exchange is needed between two non-homologous devices;
the request business card is used for requesting to execute related functions on other homologous or non-homologous equipment;
and the response business card is used for replying the function related result requested by the requester.
Preferably, the preview business card includes:
the device comprises a first inherent part and a first extension part, wherein the first inherent part is used for recording basic properties of the device, and the first extension part is used for recording functions supported by the device and events supported by the device.
Preferably, the requesting business card includes:
a second intrinsic part for documenting basic properties of the device and a second extension part,
the second extension part is used for requesting a certain function with a corresponding result on the homologous or non-homologous device or requesting the homologous or non-homologous device to only execute a certain function.
Preferably, the answer business card comprises:
a third intrinsic part and a third extension part, the third intrinsic part being used for recording basic properties of the device,
the third extension part is used for responding to a certain function with a corresponding result on the request homologous or non-homologous device or confirming that the request homologous or non-homologous device only executes the certain function.
Preferably, the functions supported by the device are encapsulated into a function description structure according to the function specifier, the supported input parameters, the return values and the data types of the values;
the event supported by the equipment represents a state of the equipment, and the acceptable input parameters and the data types are encapsulated into an event description structure body according to the event descriptor.
Another aspect of the present invention is to provide a method for data exchange using a business card system, the method comprising:
step 1), discovery/authentication/connection of devices,
the method comprises the steps of establishing discovery and connection of equipment through broadcast scanning by using a Bluetooth protocol, and establishing a multi-hop network by adopting a BLE network protocol to realize establishment of a communication link between any two points;
step 2), carrying out business card exchange preprocessing,
the new device accessing the network sends the preview business card to other devices and receives the preview business card sent by other devices at the same time,
the new equipment accessed to the network analyzes the preview business card sent by other equipment and verifies whether data exchange is needed between the two non-homologous equipment;
step 3), analyzing the function of the business card,
after the new device accessing the network analyzes the preview business card sent by other devices, if the device can be supported, the business card table is updated in the network node state table,
the new equipment and other equipment accessed to the network store the received preview business card information of the non-homologous equipment;
the business card table is used for judging whether the two devices can mutually analyze data or not;
step 4), exchanging the information of the business cards,
the request party sends a request business card to the responder;
the responder receives the request business card, analyzes the second expansion part of the request business card and fills the analysis result into the third expansion part of the response business card;
the responder packages the filled response business card, sends the packaged response business card to a message sending queue, and sends the message to the requester through a BLE network;
and the requesting party receives the response business card of the answering party, analyzes the response business card and extracts the response data of the third expansion part.
Preferably, the step 1) comprises:
step 11), initializing non-homologous equipment, and connecting the non-homologous equipment through a BLE Mesh protocol;
step 12), the non-homologous equipment broadcasts and scans surrounding broadcast data according to a certain time interval, if the broadcast data is found, the broadcast data is analyzed, and if the broadcast data meets the connection requirement, primary equipment connection is initiated;
step 13), if the connection is successful, carrying out business card exchange and route information updating; if the connection fails, the broadcast is continuously initiated or the surrounding broadcast data is scanned.
Preferably, the method further comprises:
and step 5), when the self state or function of the equipment changes, the updated business card is actively pushed to the non-homologous equipment capable of analyzing the state or function of the equipment according to the business card table.
Preferably, in step 12), if
And if the communication link state of the non-homologous equipment does not meet the connection requirement, actively disconnecting the equipment.
The business card system and the data exchange method suitable for the data exchange of the communication protocol layer provided by the invention exchange information between heterogeneous devices and realize the design of the business card system between an application layer and a protocol layer.
The invention provides a business card system suitable for data exchange of a communication protocol layer and a data exchange method, which realize a standard business card structure facing data exchange between homologous or nonhomologous devices and data exchange on a protocol layer of a communication chip. The invention adopts a business card system on a communication protocol layer, and business card exchange preprocessing is carried out between devices through previewing business cards, the business card exchange is requested and the business cards are answered to finish the attribute and the function description of the devices, the function request of the functions of the related devices is carried out, and the function states of the related devices are obtained.
The invention provides a business card system and a data exchange method suitable for data exchange of a communication protocol layer, wherein an operation control unit of a business card exchange preprocessing part and a business card information exchange part is arranged between an application layer and a protocol layer (comprising the protocol layer), and can be flexibly defined according to specific implementation.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
Further objects, features and advantages of the present invention will become apparent from the following description of embodiments of the invention, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram illustrating the structure of a preview business card according to the present invention.
FIG. 2 is a schematic diagram illustrating the structure of a request business card according to the present invention.
Fig. 3 shows a schematic structural diagram of the answering business card of the present invention.
FIG. 4 shows a flow chart of the method of the present invention for data exchange using a business card system.
Fig. 5 shows a flow diagram of the discovery/authentication/connection device of the present invention.
FIG. 6 is a flow chart illustrating the business card exchange preprocessing and business card information exchange of the present invention.
Fig. 7 is a schematic diagram illustrating data exchange between a new device B and a device a through a business card system after the new device B accesses a network according to an embodiment of the present invention.
Detailed Description
The objects and functions of the present invention and methods for accomplishing the same will be apparent by reference to the exemplary embodiments. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in various forms. The nature of the description is merely to assist those skilled in the relevant art in a comprehensive understanding of the specific details of the invention.
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts, or the same or similar steps.
The invention provides a business card system suitable for data exchange of a communication protocol layer and a data exchange method, aiming at solving the technical problems that data formats of non-homologous devices are inconsistent and are difficult to analyze in the prior art.
According to an embodiment of the present invention, a business card system adapted for communication protocol layer data exchange includes a preview business card, a request business card, and a response business card.
The preview business card, the request business card and the response business card are divided on a protocol layer, each business card is set to be an inherent part and an expansion part, and the inherent part and the expansion part of different business cards are different.
In particular, the amount of the solvent to be used,
the preview business card is mainly responsible for self-describing functions among connected devices and is used for verifying whether data exchange is needed between two non-homologous devices. As shown in fig. 1, the structure of the preview business card of the present invention includes a first inherent part and a first extension part.
The first inherent part is used for recording basic properties of the equipment, and the first extended part is used for recording functions supported by the equipment and events supported by the equipment.
The functions supported by the equipment are packaged into a function description structure body according to the function specifier, the supported input parameters, the return values and the data types of all the values;
the event supported by the equipment represents a state of the equipment, and the acceptable input parameters and the data types are encapsulated into an event description structure body according to the event descriptor.
In a particular embodiment, the first intrinsic portion comprises: equipment identification, equipment major class, equipment middle class, equipment minor class, product model, electronic serial number, version number and functional instruction number.
The first extension portion includes: function 1 supported by the device, function 2 of the device, \8230 \ 8230;, function n of the device, and a common function; event 1 supported by the device, event 2 supported by the device, \8230;, and event n supported by the device.
And the functions supported by the equipment are encapsulated into a function description structure body according to the function descriptor, the input parameters and the return value parameters. The event supported by the equipment represents a state of the equipment and is packaged into an event description structure according to the acceptable input parameters.
Fig. 2 is a schematic structural diagram of a request business card according to the present invention, which is used for requesting to execute related functions on other homologous or non-homologous devices. The request business card includes:
the device comprises a first inherent part and a first expansion part, wherein the first inherent part is used for recording basic properties of the device.
A second extension for requesting a certain function with a corresponding result on the homologous or non-homologous device (i.e. a responsive request) or for requesting the homologous or non-homologous device to perform only a certain function (a non-responsive request).
The main difference between a responsive request and a non-responsive request is whether a return value exists after the function executes.
In a particular embodiment, the second intrinsic portion comprises: product model number, electronic serial number, version number, and functional instruction number.
The second extension portion includes: (1) requesting state information after the other side executes the function; and (2) requesting the other party to execute a certain function.
As shown in fig. 3, the schematic structural diagram of the answering business card of the present invention is used for answering the request function related result of the requesting party. The answer business card comprises:
the device comprises a third inherent part and a third expansion part, wherein the third inherent part is used for recording basic properties of the device.
A third extension for responding to a request for a certain function with a corresponding result on a homologous or non-homologous device (i.e. a result specification for a responsive request), or for acknowledging that a requesting homologous or non-homologous device only performs a certain function (i.e. a request acknowledgement for a non-responsive request).
In particular embodiments, the third intrinsic portion comprises: : product model number, electronic serial number, version number, and functional instruction number.
The third extension portion includes: (1) Returning a return value of the state information after the self equipment executes the function to the request equipment; (2) And returning a confirmation message that the self equipment executes a certain function to the requesting equipment.
The request business card and the response business card are mainly responsible for the functions of the request equipment or the response equipment to mainly complete information exchange between the equipment, different equipment fills the request business card or responds to business card transmission data according to the requirements of the different equipment to realize the information exchange between the equipment, and the specific data exchange process is explained in the following.
The present invention defines the business card system at the protocol layer, and utilizes the business card system to exchange data based on the protocol layer, as shown in fig. 4, the present invention is a flow chart of the method for exchanging data by utilizing the business card system, according to the embodiment of the present invention, a method for exchanging data by utilizing a right business card system, the method includes:
step S1, discovering/authenticating/connecting equipment.
The discovery and connection of the device are established through broadcast scanning by using a bluetooth protocol, and a multi-hop network is established by using a BLE network protocol to realize the establishment of a communication link between any two points, as shown in fig. 5, which is a schematic flow diagram of the discovery/authentication/connection device of the present invention.
In particular, the discovery/authentication/connection device comprises the following method steps:
and 11, initializing the non-homologous device, and connecting the non-homologous device through a BLE Mesh protocol. The non-homologous equipment sets a Bluetooth broadcast data packet through an interface provided by the module, and mainly comprises the steps of setting broadcast data, setting broadcast response, setting equipment parameters and the like.
And step 12, the non-homologous equipment broadcasts and scans surrounding broadcast data according to a certain time interval, if the broadcast data is found, the broadcast data is analyzed, and primary equipment connection is initiated according to connection requirements (such as no repeated connection, link reliability, real-time performance and the like).
If the communication link state of the non-homologous device does not meet the connection requirement, actively disconnecting the device to ensure the quality of the whole network.
Step 13, carrying out name card exchange and routing information updating if the connection is successful; if the connection fails, the broadcast is continuously initiated or the surrounding broadcast data is scanned. The control device may be considered disconnected in some embodiments.
As shown in fig. 6, the flow diagram of the business card exchange preprocessing and the business card information exchange of the present invention will be described with reference to steps S2 to S4. In particular, the amount of the solvent to be used,
and S2, carrying out business card exchange preprocessing.
The new equipment accessing the network sends preview business cards to other equipment and receives the preview business cards sent by other equipment at the same time.
The new device accessing the network analyzes the preview business card sent by other devices, and verifies whether data exchange is needed between the two non-homologous devices, namely whether data which can be utilized by the device itself exists between the non-homologous devices (or whether the two non-homologous devices can mutually analyze is called).
And S3, analyzing the name card function.
After analyzing the preview business card sent by other equipment, the new equipment accessing the network extracts the first inherent part and the first expansion part of the preview business card, if the equipment can be supported, the business card table is updated in the network node state table,
and the new equipment and other equipment accessing the network store the received preview business card information of the non-homologous equipment.
The business card table is used for judging whether the two devices can mutually analyze data, namely, the business card table indicates which two non-homologous devices can exchange business cards.
It should be noted that: the business card table is different from the routing table, the business card table judges whether the two devices can mutually analyze data, and the routing table judges whether the two devices are communicated.
Step S4, exchanging the information of the business card,
after step S, it is confirmed that the business card exchange between the non-homologous devices is possible (the newly accessed device and the other device may perform business card exchange), in the embodiment, the other device is used as a requesting party, and the newly accessed device is used as a responding party.
The requesting party finds the previewing business card of the answering party from the stored business cards of the non-homologous devices, the requesting party sends the requesting business card to the answering party,
the responder receives the request business card, analyzes the second expansion part of the request business card, and fills the analysis result into the third expansion part of the response business card.
For example, the second extension of the requested business card sent by the requestor is parsed into: requesting state information after the other side executes the function; the answering party fills the analysis result in the third expansion part of the answering business card: and returning the return value of the state information after the self equipment executes the function to the requesting equipment.
According to the embodiment of the invention, the responder fills the second extension part of the request business card of the responder according to the received function, supported parameters and data type of the second extension part of the request business card of the requester.
For example, the second expanded portion of the requested business card sent by the requestor is parsed into: requesting state information of the other party after executing the function; the responder requests the second extension of the business card to be resolved as: and requesting the state information of the opposite side after executing the function.
And the responder packages the filled response business card, sends the packaged response business card to a message sending queue, and sends the message to the requester through the BLE network. In some embodiments, the business card encapsulation is added to the data packet header. The header data includes message sequence number, original information length, source target address, response control, encryption mark and message content.
And the requesting party receives the response business card of the answering party, analyzes the response business card and extracts the response data of the third expansion part.
In the process of the above steps S2 to S4, the party receiving the business card analyzes the business card, and first analyzes the inherent part of the business card, and the extended part in the business card is encoded and filled according to the LTV format. Therefore, the size, the length, the data format and the value of each value in the extension part can be known, and the relevant function and the response data are extracted and then transferred to an application layer to make an intelligent decision.
According to the embodiment of the invention, the method further comprises the following steps:
and S5, when the state or the function of the equipment changes, actively pushing the updated business card to non-homologous equipment capable of analyzing the state or the function of the equipment according to the business card table.
As shown in fig. 7, in an embodiment of the present invention, a schematic diagram of data exchange between a new device B and a device a through a business card system after accessing a network is shown, where the device B is used as a device newly accessed in the network, and first sends a preview business card to the device a, and after it is confirmed that the device B and the device a can exchange business card information, business card information exchange is performed, and filling of extension portions of a request business card and a response business card of the device B and the device a respectively is completed, and then the device B and the device a can perform data transmission.
The business card system and the data exchange method suitable for the data exchange of the communication protocol layer provided by the invention exchange information between heterogeneous devices and realize the design of the business card system between an application layer and a protocol layer.
The invention provides a business card system suitable for data exchange of communication protocol layer and a data exchange method, which realize a standard business card structure facing data exchange between homologous or nonhomologous devices and data exchange on a protocol layer of a communication chip. The invention adopts a business card system on a communication protocol layer, carries out business card exchange pretreatment between devices through previewing business cards, requests business card exchange and answers business cards to complete attribute and function description of the devices, requests functions of related devices and acquires function states of the related devices.
The invention provides a business card system and a data exchange method suitable for data exchange of a communication protocol layer, wherein an operation control unit of a business card exchange preprocessing part and a business card information exchange part is arranged between an application layer and a protocol layer (comprising the protocol layer), and can be flexibly defined according to specific implementation.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Claims (6)
1. A business card system adapted for communication protocol layer data exchange, said business card system comprising:
the preview business card is used for verifying whether data exchange is needed between two non-homologous devices;
the request business card is used for requesting to execute related functions on other homologous or non-homologous equipment;
the response business card is used for replying the related result of the request function of the requester;
the preview business card comprises:
the device comprises a first inherent part and a first extension part, wherein the first inherent part is used for recording basic properties of the device, and the first extension part is used for recording functions supported by the device and events supported by the device;
the request business card comprises:
a second intrinsic part for documenting basic properties of the device and a second extension part,
the second extension part is used for requesting a certain function with a corresponding result on the homologous or non-homologous equipment or requesting the homologous or non-homologous equipment to only execute a certain function;
the answer business card comprises:
a third intrinsic part and a third extension part, the third intrinsic part being used for recording basic properties of the device,
the third extension part is used for responding to a certain function with a corresponding result on the request homologous or non-homologous device, or confirming that the request homologous or non-homologous device only executes the certain function;
the method comprises the steps of establishing discovery and connection of equipment through broadcast scanning by using a Bluetooth protocol, and establishing a multi-hop network by adopting a BLE network protocol to realize establishment of a communication link between any two points;
the non-homologous equipment broadcasts and scans surrounding broadcast data according to a certain time interval, if the broadcast data is found, the broadcast data is analyzed, and primary main equipment connection is initiated if the broadcast data meets the connection requirement; if the communication link state of the non-homologous device does not meet the connection requirement, the device is actively disconnected so as to ensure the quality of the whole network.
2. The business card system of claim 1 wherein the functions supported by the device are encapsulated into a function description structure according to function specifiers, supported input parameters, return values, and data types of the values;
the event supported by the equipment represents a state of the equipment, and the acceptable input parameters and the data types are encapsulated into an event description structure body according to the event descriptor.
3. A method of exchanging data using the business card system of any one of claims 1 to 2, the method comprising:
step 1), discovery/authentication/connection of devices,
the method comprises the steps of establishing discovery and connection of equipment through broadcast scanning by using a Bluetooth protocol, and establishing a multi-hop network by adopting a BLE network protocol to realize establishment of a communication link between any two points;
step 2), carrying out business card exchange preprocessing,
the new device accessing the network sends the preview business card to other devices and receives the preview business card sent by other devices at the same time,
the new equipment accessed to the network analyzes the preview business card sent by other equipment and verifies two non-homologous sources
Whether data exchange between devices is required;
step 3), analyzing the function of the name card,
after the new device accessing the network analyzes the preview business card sent by other devices, if the device can be supported, the business card table is updated in the network node state table,
the new equipment and other equipment accessed to the network store the received preview business card information of the non-homologous equipment;
the business card table is used for judging whether the two devices can mutually analyze data or not;
step 4), exchanging the information of the business cards,
the request party sends a request business card to the responder;
the responder receives the request business card, analyzes the second expansion part of the request business card and fills the analysis result into the third expansion part of the response business card;
the responder packages the filled response business card, sends the response business card to a message sending queue, and sends the response business card to the requester through a BLE network;
the requesting party receives the response business card of the answering party, analyzes the response business card and extracts the response data of the third extension part.
4. The method according to claim 3, wherein the step 1) comprises: step 11), initializing non-homologous equipment, and connecting the non-homologous equipment through a BLEMesh protocol;
step 12), the non-homologous equipment broadcasts and scans surrounding broadcast data according to a certain time interval, if the broadcast data is found, the broadcast data is analyzed, and primary equipment connection is initiated if the broadcast data meets the connection requirement;
step 13), if the connection is successful, carrying out business card exchange and route information updating; if the connection fails, the broadcast is continuously initiated or the surrounding broadcast data is scanned.
5. The method of claim 3, further comprising:
and step 5), when the self state or function of the equipment changes, the updated business card is actively pushed to the non-homologous equipment capable of analyzing the state or function of the equipment according to the business card table.
6. The method of claim 4, wherein in step 12), if the communication link status of a non-homologous device does not meet the connection requirements, the device is actively disconnected.
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