CN116095152A - Multi-terminal-based multi-screen communication collaboration method - Google Patents
Multi-terminal-based multi-screen communication collaboration method Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
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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
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- H04W56/00—Synchronisation arrangements
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Abstract
The invention discloses a multi-screen communication cooperation method based on a plurality of terminals, which is characterized by comprising the following steps: s1, configuring a multi-band positioning system in a target area; s2, automatically switching a basic framework of a preset scheme through vector strength of labels in a positioning system and weight proportion calculation of each adjacent label; s3, the server side and the client side interact according to the gridding positions, and the client side executes corresponding operations. According to the invention, through positioning and ranging, the automatic switching display scheme of the system is supported, the manual operation cost is greatly saved, the operation accuracy and timeliness are improved, only staff holding the RFID reader is needed to accompany the whole process, the bandwidth is reduced, the cost is reduced, the delay is reduced, an internal server is adopted, the purchase of a higher bandwidth is not needed, and the internal network environment is common, so that more NAT forwarding is reduced compared with the Internet, and the delay is greatly reduced.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a multi-screen communication cooperation method based on multiple terminals.
Background
The invention has the main function of unifying communication data among multiple terminals and is used as an application control method based on remote control. More attention is paid to one-to-one control in the prior art schemes, and the scheme provider is required to provide a collaboration server, which presents a data risk. The conventional method in the prior art scheme is to install a software program for each terminal participating in control, and the method is often inapplicable to service scenes with higher safety requirements. In the prior art, for the control of the server to the remote client, the traditional information transmission modes such as instant communication software, telephone communication and the like are mainly relied on, the effectiveness of message transmission is greatly attenuated, and the timeliness and effectiveness of the operation of the master control server are affected. In addition, the prior art scheme focuses more on one-to-one control, the requirement for realizing certain processes by one machine for controlling multiple machines is difficult to meet, and the current scheme requires data to pass through an external network application server of a provider due to the business mode requirement of a remote control scheme provider, so that the problems of unsafe data, larger delay, instability and the like are caused.
For example, chinese patent application No.: CN201610997767.5 discloses a remote control method and device for improving the security of remote control. The method is applied to the server and comprises the following steps: receiving a remote control instruction which is sent by a user through a first terminal and contains a unique user identifier; determining a second terminal unique identifier corresponding to the user unique identifier according to a preset corresponding relation between the user unique identifier and the second terminal unique identifier; and sending the remote control instruction to a second terminal corresponding to the unique identifier of the second terminal so that the second terminal executes the remote control instruction. The method is applied to a first terminal and comprises the following steps: determining a unique user identifier; and sending a remote control instruction which is aimed at the second terminal and contains the unique user identification to the server. The method is applied to a second terminal and comprises the following steps: receiving a remote control instruction sent by a server; and executing the remote control instruction. The technical solution disclosed in this document is very representative, and has very good popularization in one-to-one control, but the requirement for realizing some processes by one machine to control multiple machines is difficult to meet.
From the operation perspective, the traditional manual observation method needs to input a large amount of personnel and communication cost to complete the control of a plurality of clients under the conditions of more field personnel, large field control area and more scenes, and can not ensure that a preset scheme can be switched on time and on demand. The main problems faced include: the mode based on the manual preset scheme realizes the control of one machine to multiple machines, the temporary adjustment on site needs to be subjected to a large amount of manual operation or code adjustment, and when the condition of terminal deployment on site is complex, such as the large site scale or the shielding of site personnel and more obstacles to a client screen, the control of a server is difficult, and the accurate adjustment of a plurality of clients cannot be performed quickly and effectively through the conventional autonomous observation mode of site server operators.
For the field of communication control of multiple terminals, a part of corresponding technical schemes are given in 2022 in China patent application No. CN 202111417888.5: a multi-terminal broadcasting synchronization system and method based on PTP network synchronization, the system includes: the system comprises a control platform and a plurality of terminal broadcasting devices, wherein each terminal broadcasting device is in communication connection with the control platform, the control platform is used as a control platform of all the terminal broadcasting devices and is used as a clock reference source of the terminal broadcasting devices, the control platform is used as a clock source to issue clock reference information to a plurality of the terminal broadcasting devices, the terminal broadcasting devices synchronize the local time to the time of the control platform according to the clock reference information, and the frequency of the local clock is calibrated; the terminal broadcasting equipment is also used for receiving broadcasting signals of the control platform, analyzing broadcasting information and broadcasting data. The technical scheme improves the consistency and the real-time performance of the data broadcasting of the multi-terminal broadcasting equipment. However, when multi-screen communication is cooperated based on multiple terminals, not only fixed screen side synchronization but also the flow of people in many business scenes are considered, so how to increase man-machine interaction when people flow is a key problem to be developed in multi-screen communication cooperation based on multiple terminals.
Disclosure of Invention
The invention aims at: in order to solve the problems that the technical proposal focuses more on one-to-one control, even if the technical proposal of multi-terminal cooperation is published, the technical proposal is still based on static equipment arrangement, man-machine interaction when personnel flow can not be expanded, and a development and application short board exists, and the multi-terminal-based multi-screen communication cooperation method is provided.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
s1, configuring a multi-band positioning system in a target area, wherein the positioning system value comprises a device to be tested and a plurality of labels, and meshing the target area;
s2, determining the position of the device to be detected through vector intensity of the labels in the positioning system and weight proportion calculation of each adjacent label, and automatically switching a basic frame of a preset scheme according to the position of the device to be detected by the gridding area;
s3, the server side and the client side interact according to the gridding positions, the client side executes corresponding operations and sends the operations to the server side, the server side unifies and integrates the operation state data of each client side, then distributes or updates the operation state data to the state data corresponding to each client side, and the client side receives the integrated state data and then renders a user interface to enable a user to receive an interaction result; in step S3, if automatic switching of the dynamic scene occurs, automatic switching of the dynamic scene is implemented through an automatic triggering mechanism.
The invention supports the automatic switching display scheme of the system through positioning ranging, greatly saves the system cost, improves the operation accuracy and timeliness, only needs the device to be tested to follow up in the whole process, reduces the bandwidth, reduces the cost and reduces the delay. In the invention, a common example in a positioning system is a positioning system with multiple frequency bands, which is composed of an RFID tag and an RFID reader, wherein the mobile RFID tag can be selected as a device to be tested, the RFID reader can also be selected as a device to be tested, and a client in the application can have control and display functions at the same time, and can also have control and display functions respectively according to requirements. According to the invention, the vector intensity calculation of multiple frequency bands is creatively introduced into the positioning system, the defect of insufficient positioning accuracy of a common RFID is overcome through the distinction of the frequency bands and the addition of weight calculation, the multi-frequency band data provided by the invention has lower calculation difficulty, the position of the device to be tested can be accurately obtained by combining the sufficient frequency bands according to weight matching, a holder of the device to be tested can move freely, better freedom degree is provided, the rapid man-machine interaction during personnel flow is increased, and the method is more suitable for a basic frame of a grid area automatic switching preset scheme according to the position of the device to be tested.
Preferably, in the step S3, when the server and the client interact according to the gridding position, the client performs a corresponding operation by receiving a user interaction result, and sends the operation to the server, the server issues the state data uniformly, and finally performs a Render operation according to the state data, the server links each client, integrates the operation state data of each client uniformly, and then distributes or updates the operation state data of each client to the corresponding state data of each client, and the client performs a next data Render operation according to the state data. The scene that this technical scheme was aimed at belongs to the immersive mode of complete remote monitoring, the local control system of equipment only controls the actuating mechanism of equipment, whole operation control is accomplished by remote control system, the transmission rate requirement of signal in equipment control system is very high, control system can respond to the scene immediately, the requirement communication line is high-speed reliable, in the execution process of control, need establish the connection according to the scene demand temporarily, carry out the interaction between the equipment and between the personnel, the state information of equipment can be gathered and analysis processing at the remote monitoring end at any time, form unified operation instruction.
Preferably, in the step S3, when the server and the client interact according to the gridding position, the client performs the following sub-steps:
S3.1A, initialization process:
when the client side is initialized, a group id provided by a user is obtained, after the websocket long connection is established, the group id is carried, and a storage operation is executed;
S3.2A, interaction procedure:
the client receives the user interaction behavior, converts the execution behavior into corresponding updating operation, and sends the corresponding updating operation to the server through the established connection;
the client keeps accepting the state issued or updated by the server, and if the server sends corresponding state data, the client renders a corresponding user interface according to the state data;
the client sends index operation to the server according to the set interval to verify whether the server survives, and actively discovers and rebuilds the connection when the connection is disconnected;
S3.3A, termination phase:
the user closes the client program and stops sending any operation to the server.
Preferably, in the step S3, when the server and the client interact according to the gridding position, the server performs the following sub-steps:
S3.1B, initialization process:
In the process, the server waits for a client connection request and is always in a monitoring state, and when a saving operation is accepted, the server inquires whether an id packet carried by the server exists, if so, the server saves the connection and updates the latest time; if not, newly creating a packet and recording the creation time;
S3.2B, interaction procedure:
receiving an updating operation and an indexing operation sent by a client, and returning current latest state data to the client after receiving the indexing operation; after receiving the update operation, finding out the current state data of the packet according to the packet id carried by the packet, updating the state data, then finding out the clients connected by the existing packet, and distributing the state data to all the clients;
S3.3B, cleaning stage:
when all connections of a packet do not update or acquire state data within a set time, the server judges that the packet is useless, and releases resources occupied by the packet.
Preferably, in the step S2, the positioning system uses an active RFID system adapted to be localized using ultra-high frequency and microwave bands. The ultra-high frequency and microwave frequency bands are large in differentiation degree, the interference between detection and calculation is small, and the preset steps can be better executed in the system.
In the locating point measuring scheme, an additional fixed reference label is adopted for auxiliary locating, and the coordinates of the device to be measured are calculated by comparing the signal intensity value of the reference label with the signal intensity value of the device to be measured and matching with the weight addition of the nearest distance. Because the device to be tested has the condition of moving in real time and the problems of sampling period, sampling equipment synchronization and the like, the additional fixed reference label is adopted for auxiliary positioning, the positioning accuracy and reliability are increased, the follow-up action can be performed on the premise of determining the accuracy of data through the verification of error values, and the grid switching is more free and accurate.
In the step S2, when the device to be detected is the tag to be located, the coordinate position calculating process is as follows:
a1, defining a signal intensity vector of a reference label as follows:
，S Ri an intensity vector value representing the reference tag on reader i;
a2, the signal intensity vector of the label to be positioned is:
，S Ti an intensity vector value representing the tag to be located on reader i;
A3、S Ri and S is equal to Ti Euclidean distance E between j The method comprises the following steps:
，j∈（1,M），E j smaller means closer distance between the reference tag and the tag to be positioned;
a4, calculating the coordinates to be positioned according to the reference label with the k closest to the signal intensity of the label to be positioned, wherein the coordinates to be positioned are as follows: (x, y) = 
，W l For the corresponding weight value of the first adjacent reference tag, l=1, 2,3, …, K<M, K are M Euclidean distances E j W is the smallest K adjacent tags 1 The method is obtained according to an empirical formula:
preferably, in the step S2, a correction step is provided to define an estimation error by setting a standard label for determining a position when calculating the coordinate position of the device under test:
e=
+/>
，
where (x, y) is the estimated device under test position, (x) 0 ,y 0 ) As the actual location of the standard tag,
and when the estimated error is larger than a preset value, re-executing the coordinate position calculating step of the device to be measured.
That is, when the user will be at the actual position of the standard tag, if the difference between the calculated position and the actual position of the device to be measured is greater than the set threshold, the estimated error will be determined to be too large, and the calculation of the determined position will be performed again.
In step S3, when the device to be tested enters the preset grid boundary, the display scheme in the grid is automatically triggered, and the display scheme is synchronously displayed by at least one controlled device according to the transmitted signal. For example, in step S3, when the device to be tested is an RFID reader, the method includes the following steps:
b1, identifying and starting, wherein a person carrying the RFID reader enters an identifiable region, and a plurality of adjacent tag signals are received by the RFID reader at the moment;
B2, entering a grid area, when a person carrying the RFID reader enters a room, receiving a tag signal in the room, and judging that the target RFID reader enters the grid area through signal magnitude identification, wherein a controlled display end in the grid area displays the content of a plan according to a control end instruction;
and B3, switching the grid areas, and automatically triggering display plans in the corresponding grid areas by the system through the positioning positions of the labels when staff carrying the RFID reader enter other grid areas. When the device to be tested is an RFID tag, the opposite arrangement can be performed, and a person skilled in the art can deduce that the RFID tag and the RFID reader can be arranged in pairs in a mutually replaced manner, and the device has advantages and disadvantages in arrangement, but does not affect the final implementation effect of the device.
Preferably, in the step S1, the on-site nano-tube area is divided in a gridding manner by displaying the characteristics of the terminal device and the operation requirements of the service, and the area division is performed according to the following steps:
c1, carrying out first regional grid division according to the content subject;
c2, on the basis of the first division, carrying out the second division or adjustment according to the number of the display terminals in the area;
And C3, on the basis of C2, adjusting the division scheme according to the single grid area of the region in a grid combination mode.
The grid division has important significance, reasonably sets the division sequence, is beneficial to the reasonable configuration of the regional grids, and is beneficial to positioning accuracy and quick response.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
through location ranging, support system automatic switch show scheme, greatly practice thrift manual operation cost, improve operation accuracy and timeliness, whole process only need hold the staff of RFID reader and accompany, reduced bandwidth, the cost is reduced, the delay is reduced, owing to be the internal server, so can not be limited by network operator's bandwidth and other scheme provider's servers, need not purchase higher bandwidth, and the bandwidth acceleration service that scheme provider provided, owing to the internal network environment is common, more NAT of having reduced in comparison with the internet is forwarded, very big reduction delay.
Drawings
FIG. 1 shows a schematic diagram of an original region structure provided according to an embodiment of the present invention;
FIG. 2 shows a schematic diagram of a meshed area structure provided according to an embodiment of the present invention;
FIG. 3 shows a schematic diagram of a nearest distance theory structure provided according to an embodiment of the invention;
FIG. 4 illustrates a schematic architecture provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram showing the original state structure of a grid area according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a grid area trigger state structure according to an embodiment of the present invention;
fig. 7 shows a schematic diagram of a mesh region switching state structure according to an embodiment of the present invention.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
A multi-terminal-based multi-screen communication cooperation method comprises the following steps:
s1, configuring a multi-band positioning system in a target area, wherein the positioning system value comprises a device to be tested and a plurality of labels, and meshing the target area;
S2, determining the position of the device to be detected through vector intensity of the labels in the positioning system and weight proportion calculation of each adjacent label, and automatically switching a basic frame of a preset scheme according to the position of the device to be detected by the gridding area;
s3, the server side and the client side interact according to the gridding positions, the client side executes corresponding operations and sends the operations to the server side, the server side unifies and integrates the operation state data of each client side, then distributes or updates the operation state data to the state data corresponding to each client side, and the client side receives the integrated state data and then renders a user interface to enable a user to receive an interaction result; in step S3, if automatic switching of the dynamic scene occurs, automatic switching of the dynamic scene is implemented through an automatic triggering mechanism.
According to the embodiment, the system automatic switching display scheme is supported through positioning ranging, the system cost is greatly saved, the operation accuracy and timeliness are improved, only the device to be tested is required to carry out follow-up in the whole process, the bandwidth is reduced, the cost is reduced, the delay is reduced, the internal server is adopted, the internal server is not limited by the bandwidth of a network operator and the servers of other scheme providers, the higher bandwidth is not required to be purchased, the bandwidth accelerating service provided by the scheme provider is not required, and the internal network environment is common, so that more NAT forwarding is reduced compared with the Internet, and the delay is greatly reduced. In this embodiment, a positioning system with multiple frequency bands is a common example of a positioning system, where a mobile RFID tag may be selected as a device to be tested, and an RFID reader may be selected as a device to be tested, and two important components of the RFID system are the reader and the tag. The reader-writer specifically comprises an antenna, a transceiver, a basic control unit, a logic interface and the like, and can conveniently perform data transmission and exchange with the tag and the background application program. The tag includes two parts, a chip and an antenna. The tag chip is a data carrier, i.e. an ID system, which can store basic information of the grid area location. When the target tag enters the working field range of the reader-writer antenna, the reader and the tag realize data interaction by means of electric field or magnetic field coupling. The client in the application can have control and display functions at the same time, and also can have control and display functions respectively according to requirements. In this embodiment, the inventive multi-band vector intensity calculation is introduced into the positioning system, and the defects of insufficient positioning accuracy of general RFID are overcome by the differentiation of frequency bands and the addition of weight calculation.
Referring to fig. 1 to 7, the present invention provides a technical solution:
a multi-terminal-based multi-screen communication cooperative method is characterized by comprising the following steps:
s1, dividing a virtual reality meshing area, wherein a site needing remote control generally has the following characteristics: larger areas (large-area meeting places) or complex structural layout (such as multiple isolated room scenes), on-site observed occlusion points (building, personnel influence), and complex sound background (background music, noise, etc.). In order to ensure the remote control effect under the condition, the technical scheme divides the on-site nano-tube area in a gridding mode through the characteristics of display terminal equipment and the service operation requirement, and the division result of the gridding area can be displayed on a computer screen through a modeling tool so as to support track and coordinate positioning based on the gridding area;
original region representation: the in-region elements include: room, display client (containing number), as in fig. 1;
requirements for region division:
C1. core requirements for dividing regional grids with display content topics
C2. The number of display terminals in the area is not suitable to be too large
C3. The area of a single grid of the area is not excessively large, and a switching scheme can be formed by a grid combination mode
The effect of the implementation of the gridded region is as shown in fig. 2:
s2, positioning an integrated RFID chip technology, and accurately positioning a virtual grid boundary through the RFID radio frequency chip technology on the basis of grid region division, wherein the positioning is used as a basic frame for triggering automatic switching of a preset scheme of the grid region.
According to different working frequencies of the RFID system, in order to adapt to regional field characteristics, the combination deployment is generally carried out by adopting a mode of combining an ultrahigh frequency (1-15 m) and a microwave frequency band (1-3 m). From an implementation cost perspective, active (battery powered) RFID tags may be used for convenient identification of the grid to accommodate certain situations where long-term curing is necessary.
Taking the most typical field display scheme as an example, assuming that N RF readers, M reference tags and U devices to be tested exist, the N readers respectively read signal field intensity values sent to the readers by the M reference tags and the U pending tags, and the field intensity values are divided into 1-8 total 8 grades.
When the device to be detected is a label to be positioned, the coordinate position calculation process is as follows:
a1, defining a signal intensity vector of a reference label as follows: 
，S Ri An intensity vector value representing the reference tag on reader i;
a2, the signal intensity vector of the label to be positioned is:
，S Ti an intensity vector value representing the tag to be located on reader i;
A3、S Ri and S is equal to Ti Euclidean distance E between j The method comprises the following steps:
，j∈（1,M），E j smaller means closer distance between the reference tag and the tag to be positioned;
a4, calculating the coordinates to be positioned according to the reference label with the k closest to the signal intensity of the label to be positioned, wherein the coordinates to be positioned are as follows: (x, y) =
，W l For the corresponding weight value of the first adjacent reference tag, l=1, 2,3, …, K<M, K are M Euclidean distances E j W is the smallest K adjacent tags 1 The method is obtained according to an empirical formula:
preferably, in the step S2, a correction step is provided to define an estimation error by setting a standard label for determining a position when calculating the coordinate position of the device under test:
e=
+/>
，
where (x, y) is the estimated device under test position, (x) 0 ,y 0 ) As the actual location of the standard tag,
and when the estimated error is larger than a preset value, re-executing the coordinate position calculating step of the device to be measured.
That is, when the user will be at the actual position of the standard tag, if the difference between the calculated position and the actual position of the device to be measured is greater than the set threshold, the estimated error will be determined to be too large, and the calculation of the determined position will be performed again.
According to the formula, which sensor the appointed RF reader is nearest to can be obtained, and the display scheme set in the grid area where the sensor is located can be triggered by the system identifying the area.
S3, the server interacts with the client, the terminal main body is divided into two types, one type is the client, and the other type is the server. The client side is used for receiving the user interaction result, executing corresponding operation, sending the operation to the server side, enabling the server side to uniformly issue the state, and finally executing the Render operation according to the state. The server is used for linking the clients, integrating the operation states of the clients uniformly, then distributing the integrated states to the clients, and carrying out the following data Render operation according to the states by the clients.
In the client, local state data (state) is maintained by each terminal, which contains modules of compact, reduce-saga, dva, webSocket, etc. The reaction is used for constructing a Javascript library of a user interface and is responsible for realizing the function of interaction with a user, and the reaction furthest reduces the interaction with the DOM through simulation of the DOM and optimizes the user experience. Redux is a state management tool that controls changes in local state data by limiting the time and manner in which updates occur. The behavior module (action) may be enabled when data in the local state data needs to be updated. The current update is described through the behavior module, so that the instruction accepted by the application can be known clearly. And (3) connecting the local state data and the behavior module in series through a reference function (reducer), receiving instructions sent by the two modules, and returning a new running result of the local state data. Through the configuration, the behavior module meeting the service requirement can be defined in the client application and bound to the corresponding local state data and the view corresponding to the module, so that stable rendering of the client node is realized. By managing the side effects of the application program through the reduced-saga library, the side effects refer to the phenomenon which is generated by the application program and is easy to cause the running problem of the application program, and the method is characterized by comprising the following steps:
1. The generation of side effects is generally not visual, and when a bug exists in a program, the cause of the bug is difficult to track and determine, and the test is not facilitated.
2. The readability of the program is reduced, and the difficulty of maintenance and expansion in the future is manufactured.
For example: in JavaScript use, all code shares the same global namespace (global namespace), and all local scopes (local scopes) that are not declared (unclamped) are automatically added to the global namespace. Depending on global variables, contradictions and interference between scripts can be caused, and global environment pollution is caused.
Therefore, it is necessary to manage side effects of the application program to achieve the goals of efficient execution of the application program, reduced complexity of testing, and rapid localization of failure causes. Dva is a module integration tool, and the modules are uniformly tidied and packed by Dva and supplied to a client for use. The WebSocket module has the function of keeping long-time link with the server, and ensuring that the information of the server can be correctly and quickly pushed to the server.
The server side mainly comprises a Nodejs and a WebSocket module. Nodejs is a C++ program developed by a Chrome-based V8 engine, and aims to provide an operating environment of JS to assist JS in developing high-performance server codes. The connection process adopts the WebSocket protocol. WebSocket is a protocol that performs full duplex communication over a single TCP connection. The WebSocket communication protocol was set by IETF as standard RFC 6455 in 2011 and is complemented by RFC 7936. WebSocket API is also standardized by W3C. Server resources and bandwidth can be better saved, and communication can be performed in real time.
The server defines update, save, index3 kinds of local behavior modules (actions) open to the client, and 1 kind of del is only an internal open behavior module (action). Update: and receiving the local state data of the same group id, merging with the previous state data, and forwarding the merged state data to all clients of the same group. Save: and adding a client connection, and adding the client connection into a corresponding group or creating a group according to the carried group id. Index: retrieving the carried packet id and returning the current latest state to the client side executing index. Del: and (3) the server side maintains internally, queries groups of states which are not updated for a long time at regular time, performs del operation on the groups which are not updated for a certain time, deletes links between the states and the client side, and releases server side resources.
The communication between the client and the server follows the following procedure.
A. Client terminal
S3.1A, initialization process:
when the client is initialized, the packet id provided by the user is obtained. And after establishing the websocket long connection, carrying the packet id, and executing a save-action.
S3.2A, interaction procedure:
the client receives the user interaction behavior, converts the execution behavior into corresponding update-action, and sends the corresponding update-action to the server through the established connection.
The client always keeps accepting the state of the server state. If the server sends a state, the client renders a corresponding user interface according to the state.
The client sends index-action to the server every 10s, or other short time interval, in order to verify that the server survives and to ensure that the connection is actively discovered and re-established in case of a link break.
S3.3A, termination phase:
the user closes the client program, i.e. stops sending any actions to the server.
B. Service end
S3.1B initialization procedure
In the process, the server waits for a client connection request and is always in a monitoring state. When the save-action is accepted, inquiring whether the carried id packet exists, if so, saving the connection and updating the latest time. If not, the packet is newly created and the creation time is recorded.
S3.2B interaction procedure
And receiving the update-action and the index-action sent by the client. After receiving the Index-action, the current latest state is returned to the client. When the update-action is accepted, the current state of the packet is found according to the packet id carried by the update-action, and the state is updated. The clients of the existing packet connection are then found and the state is distributed to all the clients of the group.
S3.3B and cleaning stage
When all connections of a certain packet are not updated or state is acquired within a long enough time (defined by a service scenario, generally 24 h), the server judges that the packet is useless, and internal del-action is executed to release the resources occupied by the packet.
The client receives user interaction behavior, executes corresponding actions, and after the client calls the actions to update states each time, the client sends the unified states to the server through the websocket module. The server defines several operations of update, save and index, and processes the operations according to the type of the action sent by the client. Each client will carry its own identity and the id of the combined application. The server groups each client according to the ids of different combined applications, and after the client state updates of the same group are integrated, only other client applications of the same group are affected, so that data isolation among different applications is ensured. The server receives the states sent by the clients, records the history records, distributes the history records to the clients in the same group corresponding to the current action, receives the integrated states by the clients, and then renders the user interface to enable the user to receive the interaction results.
For example:
existing client CA1, client CA2, client CA3, client CA4, client CB1, client CB2, and a server S1;
the user designates the packet id as a for CA1, CA2, CA3, CA4, and B for CB1, CB 2. When a user opens six clients, each client sends save-action to S1, so that inside S1, CA2, CA3, CA are grouped into a group, id is A. CB1, CB2 are grouped into a group, id B. At this time, the states of all clients in group A are 0, and all clients in group B are 1.
And (3) operating the CA1 by a user for a certain time to enable the state of the CA1 to be converted into 2, wherein at the moment, the CA1 sends update-action to the S1, the S1 receives the action, updates the state in the group into 2, and distributes the state to the CA1, the CA2, the CA3 and the CA4, so that four clients in the A group all obtain the latest state, and different user interfaces are rendered according to different services. The current round of operation does not affect group B, CB1, CB2 still performs the rendering result with state 1.
After the user closes CA1, CA2, CA3 and CA4, after a period of time, S1 finds that all clients in the A group are updated or acquired state for a long time, and performs del-action internally to release A group resources. At this time, the group B client still continuously transmits index-action at intervals of 10S, and S1 considers that the group B client is normal and keeps running.
In the above description, CA1 is the control end in the sense, and CA2, CA3, and CA4 are the controlled ends in the sense. The overall topology is shown in fig. 4 below. Automatic switching of dynamic scenes is achieved through an automatic triggering mechanism.
Specifically, as shown in fig. 1, in the step S3, the client is operative to receive the user interaction result, execute the corresponding operation, send the operation to the server, and the server issues the state uniformly, and finally execute the Render operation according to the state, and the server links each client, and after integrating the operation states of each client uniformly, sends the integrated operation states to each client, and the client performs the next data Render operation according to the state.
After basic preparation such as meshing area division, definition of display plans, client side and server side development and the like is completed, automatic switching of dynamic scenes can be realized through an automatic trigger mechanism.
As shown in fig. 3 and fig. 5-7, the automatic triggering mechanism refers to automatically triggering the display scheme in the grid when the target client is identified to enter the preset grid boundary through the RFID chip. The display scheme is synchronously displayed by one or more controlled clients according to signals transmitted by the control end. The main flow is as follows:
B1, identifying and starting, and not entering the grid area
As shown in fig. 5, the staff carrying the RFID reader enters the identifiable region, and at this time, 4 adjacent tag signals are received by the RFID reader, and the distance recognition result is that the staff does not enter the preset grid region, so that the pictures in the subject regions 1-10 keep the original content.
B2, entering a grid area, and automatically triggering
As shown in fig. 3 and fig. 6, when a worker carrying an RFID reader enters a room, at this time, a tag signal in the room is received, and by identifying the signal level (nearest neighbor distance principle), the system determines that the target RFID reader has entered the grid 1 area, at this time, 3 controlled display ends in the grid 1 area will display the content of the theme 1 plan according to the instruction of the control end.
B3, grid area switching
According to the process defined in S2, when a worker carrying an RFID reader enters other grid areas, the system automatically triggers the display plans in the corresponding grid areas through the positioning positions of the tags, so as to form a scheme that the worker carrying the RFID reader enters the grid 3 area from the grid 1 area, and the content of 4 displays in the display area is switched to subject 2-2 as shown in fig. 7.
It should be noted that: when the device to be tested is an RFID tag, the device to be tested can be reversely arranged, and a person skilled in the art can deduce that the RFID tag and the RFID reader can be mutually replaced in pairs, and the device to be tested has advantages and disadvantages in arrangement, but does not influence the final implementation effect of the device to be tested.
In summary, the present embodiment can be applied to a set of one-control-multiple-synchronization processes.
For example, the conference flow is defined as 3 scenes S1, S2, S3, which are completed in three steps. The hardware architecture is shown in fig. 1. Wherein CA1 is used as a control end, and CA2, CA3 and CA4 are used as controlled demonstration ends. The above examples are merely for convenience of description, wherein the number of steps and controlled ends can be elastically changed, and the number of controlled ends is at least 1.
S1: scene 1: the controlled demonstration ends CA2 and CA3 need to be combined to use, the display area is enlarged, one picture A is displayed together, CA2 displays 1/2 of the picture A, CA3 displays 1/2 of the picture A, and CA4 displays a single picture B.
S2: scene 2: the controlled presentation terminal CA2 needs to display the picture C alone, CA3 needs to be switched to 1/2 of the picture D, and CA4 needs to display 1/2 of the picture D.
S3: scene 3: the controlled demonstration ends CA2, CA3 and CA4 are respectively used for displaying 1/3 of the picture E to form a common combined demonstration effect.
The three steps above, if handled by a human, may occur as follows: such as an out of sync of picture display, displaying an erroneous picture, etc. In the practical application process, when the control flow is complex, the probability of manual control error is high.
By adopting the method, the application can be developed through the reaction in advance, and the picture to be displayed is bound with the step. The control end designs control plans, namely an S1 control plan, an S2 control plan and an S3 control plan. The control end CA1 automatically starts the demonstration scheme of the area according to the position information transmitted by the RFID positioning technology. When the target positioning position enters the grid area set by the S1 scheme, the control end (CA 1) and the controlled demonstration ends (CA 2, CA3 and CA 4) can enter the mode of the S1 control scheme by synchronizing verification codes. The control terminal CA1 sends the predefined display content number to the controlled demonstration terminal through the interface, and the controlled demonstration terminals CA2, CA23 and CA24 simultaneously receive the information of the step S1 and then make corresponding operation (display corresponding content). Similarly, when the target positioning position leaves the S1 control plan setting area and enters the S2 control plan or S3 control plan setting area, the control end in the corresponding plan setting area controls the controlled demonstration end of the area to display the content according to the existing demonstration scheme, so as to complete the target of automatic remote control display. The overall handover can be controlled to be completed within 20ms without considering network delay (non-outage situation). In practical application, the method can be combined with auxiliary business processes such as scene previewing and the like, so that the probability of occurrence of problems is minimized.
The service provides four behavior module (action) control ends, is generally configured to open 3 control ends to the outside, uses 1 control end internally, does not depend on external components, processes synchronous data by a memory, has extremely low delay, can ensure that the synchronous data transmission of a service segment can be completed within 2ms, and can realize switching under the condition of no sense of a user.
The technical key point of the invention is synchronous service developed by using a node technology and positioning through an RFID chip and a gridding technology. The RFID chip and the gridding technology ensure the scene application of automatic switching, and the node technology is used as a control core of a plurality of machines, so that the stable high-speed availability of the system is ensured.
The scene that this technical scheme was aimed at belongs to the immersive mode of complete remote monitoring, and the local control system of equipment only controls the actuating mechanism of equipment, and whole operation control is accomplished by remote control system. The signal transmission speed in the equipment control system is high, the control system can immediately react to the site, and the communication line is required to be high-speed and reliable. In the execution process of control, connection needs to be established temporarily according to field requirements, interaction between equipment and personnel is carried out, and state information of the equipment can be collected, analyzed and processed at a remote monitoring end at any time to form a unified operation instruction.
From the operation perspective, the traditional manual observation method needs to input a large amount of personnel and communication cost to complete the control of a plurality of clients under the conditions of more field personnel, large field control area and more scenes, and can not ensure that a preset scheme can be switched on time and on demand. The main problems faced include: the mode based on the manual preset scheme realizes the control of one machine to multiple machines, the temporary adjustment on site needs to be subjected to a large amount of manual operation or code adjustment, and when the condition of terminal deployment on site is complex, such as the large site scale or the shielding of site personnel and more obstacles to a client screen, the control of a server is difficult, and the accurate adjustment of a plurality of clients cannot be performed quickly and effectively through the conventional autonomous observation mode of site server operators.
In this embodiment, reduce may be used to solve the problem that the interaction result is complex and the rendering of the local client is complex. As single page applications develop more and more, javaScript needs to manage more states than ever, which may include server response, caching data, locally generating data that has not been persisted to the server, and UI states, such as activated routes, selected labels, whether to display loading actions or pagers, etc., managing the continuously changing states is very difficult, for example, if there is a linkage relationship between a module change and other modules, and there is a relationship between a module and a view that affects each other, when a view changes, it may cause one or more modules to change in linkage, affected by the linkage relationship between a module and a view, and possibly cause another view to change, forming a complex butterfly-like phenomenon, so when the system relationship is too complex, reproduction problems or adding new functions become difficult to step.
In the embodiment, node is adopted to solve the development problems of low consumption, low coupling and high expansion of server application, and node.js runs a V8 JavaScript engine outside a browser, so that the performance of node.js is very good; js application runs in a single process without creating a new thread for each request; node.js provides a set of asynchronous I/O primitives in its standard library to prevent JavaScript code blocking, typically the library in node.js is written using a non-blocking paradigm, making blocking behavior abnormal rather than normal, when node.js performs I/O operations, node.js will resume operations when the response returns, which allows node.js to handle thousands of concurrent connections using a single server without introducing the burden of managing thread concurrency.
In the embodiment, the WebSocket protocol is introduced as a communication protocol between the client and the server, so that the problems of short duplex communication function, long corresponding time and low efficiency of a polling scheme and less control overhead of the http and other protocols are solved. When exchanging data between the server and the client after connection creation, the header of the data packet for protocol control is relatively small, and the size of the header is only 2 to 10 bytes for the content from the server to the client without extension; for client-to-server content, this header also requires an additional 4 byte mask. This overhead is significantly reduced compared to HTTP requests that carry a complete header each time; the real-time performance is stronger, and the server can actively send data to the client at any time because the protocol is full duplex. Compared with the HTTP request, the response can be achieved by waiting for the client to initiate the request server, and the delay is obviously less; even a long poll comparison like Comet, etc., it can transfer data more times in a short time; maintaining the connection state, unlike HTTP, websocket needs to create a connection first, which makes it a stateful protocol, and then part of the state information can be omitted when communicating, while HTTP requests may need to carry state information at every request; better binary support, websocket defines a binary frame, and can process binary contents more easily than HTTP; extensions may be supported. Websocket defines expansion, and a user can expand a protocol and realize a partial custom sub-protocol, such as partial browser support compression and the like; better compression effect, websocket can keep up with the context of the previous content under proper expansion support, and compression rate can be remarkably improved when similar data is transferred.
In the embodiment, the problem of confusion and complexity of the traditional application development logic is solved by adopting the compact, and the declaration type design is as follows: the fact makes it easy to create an interactive UI, to design a compact view for each state of the application, and the fact can efficiently update and render appropriate components when the data changes; componentization, namely constructing a packaging component for managing the state of the packaging component, and then combining the packaging component to form a complex UI; high efficiency: the reaction furthest reduces interaction with the DOM through simulation of the DOM; flexible: and the method is compatible with various mainstream technical stacks currently used, and new functions are developed by introducing a reaction on the premise of not rewriting the existing codes.
The embodiment can select a modularized mode for development, and because the development content is split into a plurality of modules, an application provider can develop different modules in parallel, so that a rapid and efficient delivery target is realized, the whole development period and modification cost are reduced, and meanwhile, the mutual coordination of developers is facilitated, and the conflict during merging is reduced.
The previous description of the embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention will not be limited to the embodiments shown herein, but rather should be consistent with the disclosure herein
Is the broadest scope consistent with the principles and novel features of (a).
Claims (10)
1. A multi-screen communication cooperation method based on multiple terminals is characterized by comprising the following steps:
s1, configuring a multi-band positioning system in a target area, wherein the positioning system value comprises a device to be tested and a plurality of labels, and meshing the target area;
s2, determining the position of the device to be detected through vector intensity of the labels in the positioning system and weight proportion calculation of each adjacent label, and automatically switching a basic frame of a preset scheme according to the position of the device to be detected by the gridding area;
s3, the server side and the client side interact according to the gridding positions, the client side executes corresponding operations and sends the operations to the server side, the server side unifies and integrates the operation state data of each client side, then distributes or updates the operation state data to the state data corresponding to each client side, and the client side receives the integrated state data and then renders a user interface to enable a user to receive an interaction result; in step S3, if automatic switching of the dynamic scene occurs, automatic switching of the dynamic scene is implemented through an automatic triggering mechanism.
2. The multi-terminal-based multi-screen communication collaboration method of claim 1, wherein in the step S3, when the server side and the client side interact according to the gridding positions, the client side is operative to receive the user interaction result, execute the corresponding operation, send the operation to the server side, the server side issues the status data uniformly, and finally execute the Render operation according to the status data, the server side is operative to link each client side, and after integrating the operation status data of each client side uniformly, send or update the status data corresponding to each client side, and the client side performs the next data Render operation according to the status data.
3. The multi-terminal-based multi-screen communication collaboration method according to claim 2, wherein in the step S3, when the server and the client interact according to the gridding position, the client performs the following sub-steps:
S3.1A, initialization process:
when the client side is initialized, a group id provided by a user is obtained, after the websocket long connection is established, the group id is carried, and a storage operation is executed;
S3.2A, interaction procedure:
the client receives the user interaction behavior, converts the execution behavior into corresponding updating operation, and sends the corresponding updating operation to the server through the established connection;
the client keeps accepting the state issued or updated by the server, and if the server sends corresponding state data, the client renders a corresponding user interface according to the state data;
the client sends index operation to the server according to the set interval to verify whether the server survives, and actively discovers and rebuilds the connection when the connection is disconnected;
S3.3A, termination phase:
the user closes the client program and stops sending any operation to the server.
4. A multi-terminal based multi-screen communication collaboration method according to claim 3, wherein in the step S3, when the server and the client interact according to the gridding position, the server performs the following sub-steps:
S3.1B, initialization process:
in the process, the server waits for a client connection request and is always in a monitoring state, and when a saving operation is accepted, the server inquires whether an id packet carried by the server exists, if so, the server saves the connection and updates the latest time; if not, newly creating a packet and recording the creation time;
S3.2B, interaction procedure:
receiving an updating operation and an indexing operation sent by a client, and returning current latest state data to the client after receiving the indexing operation; after receiving the update operation, finding out the current state data of the packet according to the packet id carried by the packet, updating the state data, then finding out the clients connected by the existing packet, and distributing the state data to all the clients;
S3.3B, cleaning stage:
when all connections of a packet do not update or acquire state data within a set time, the server judges that the packet is useless, and releases resources occupied by the packet.
5. The multi-terminal based multi-screen communication cooperative method according to claim 4, wherein in the step S2, the positioning system is an active RFID system adapted to be localized using ultra-high frequency and microwave bands.
6. The multi-terminal based multi-screen communication cooperative method according to claim 5, wherein in the positioning point measurement scheme, an additional fixed reference label is adopted for assisting positioning, and the coordinates of the device to be measured are calculated by comparing the signal intensity value of the reference label with the signal intensity value of the device to be measured and matching the weight addition of the nearest distance.
7. The multi-terminal based multi-screen communication cooperative method according to claim 5, wherein in the step S2, when the device to be tested is a tag to be positioned, the coordinate position calculating process is as follows:
a1, defining a signal intensity vector of a reference label as follows:
，S Ri an intensity vector value representing the reference tag on reader i;
a2, the signal intensity vector of the label to be positioned is:
，S Ti an intensity vector value representing the tag to be located on reader i;
A3、S Ri and S is equal to Ti Euclidean distance E between j The method comprises the following steps:
，j∈（1,M），E j smaller indicates the reference label and the label to be positionedThe closer the tag distance;
a4, calculating the coordinates to be positioned according to the reference label with the k closest to the signal intensity of the label to be positioned, wherein the coordinates to be positioned are as follows: (x, y) =
，W l For the corresponding weight value of the first adjacent reference tag, l=1, 2,3, …, K <M, K are M Euclidean distances E j W is the smallest K adjacent tags 1 The method is obtained according to an empirical formula:
8. the multi-terminal based multi-screen communication cooperative method according to claim 7, wherein in the step S2, a correction step is provided for calculating the coordinate position of the device to be measured, a standard tag for determining the position is set, and an estimation error is defined:
e=
+/>
，
where (x, y) is the estimated device under test position, (x) 0 ,y 0 ) As the actual location of the standard tag,
and when the estimated error is larger than a preset value, re-executing the coordinate position calculating step of the device to be measured.
9. The multi-terminal-based multi-screen communication collaboration method according to claim 5, wherein in step S3, when the device to be tested is identified to enter the preset grid boundary, the display scheme in the grid is automatically triggered, and the display scheme is synchronously displayed by at least one controlled device according to the transmitted signal.
10. The multi-terminal-based multi-screen communication collaboration method according to claim 1, wherein in the step S1, the on-site nano-tube area is divided in a gridding manner by displaying the characteristics of the terminal device and the service operation requirements, and the area division is performed according to the following steps:
C1, carrying out first regional grid division according to the content subject;
c2, on the basis of the first division, carrying out the second division or adjustment according to the number of the display terminals in the area;
and C3, on the basis of C2, adjusting the division scheme according to the single grid area of the region in a grid combination mode.
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