CN112351413B - Multi-base-station electronic tag system based on batch paging - Google Patents
Multi-base-station electronic tag system based on batch paging Download PDFInfo
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- CN112351413B CN112351413B CN202011038432.3A CN202011038432A CN112351413B CN 112351413 B CN112351413 B CN 112351413B CN 202011038432 A CN202011038432 A CN 202011038432A CN 112351413 B CN112351413 B CN 112351413B
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0294—Traffic management, e.g. flow control or congestion control forcing collision
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
- H04W68/005—Transmission of information for alerting of incoming communication
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention relates to a multi-base station electronic tag system based on batch paging, which can not only maintain the large-scale updating of electronic shelf tags under low collision probability, but also update quickly, accurately and efficiently, wherein a base station can broadcast for paging; after receiving the paging request of the base station, the specific electronic shelf label can send the information of the specific electronic shelf label to the base station, after receiving the response information of the electronic shelf label or the batch of electronic shelf labels, the base station allocates new connection parameters one by one and issues the new connection parameters to the corresponding electronic shelf labels, and the base station sends the service data issued by the background management device to the electronic shelf labels through the newly allocated connection parameters. The advantages are that: the system solves the problem of high probability of communication conflict between a large number of electronic shelf labels and a base station through a batch limited paging awakening mechanism; secondly, the system effectively controls the whole system to be maintained under the low conflict probability by means of reducing internal communication conflicts and external conflicts.
Description
Technical Field
The invention relates to a multi-base-station electronic label system based on batch paging, which can maintain large-scale updating of electronic shelf labels under low collision probability, is quick, accurate and efficient in updating, is simpler in system layout and is low in maintenance frequency of the electronic shelf labels, and belongs to the technical field of electronic shelf labels.
Background
The electronic shelf label is a product which is popular in recent years, replaces the traditional paper shelf label, ensures that the content of the label is modified more quickly and accurately, saves a large amount of labor cost, and is more environment-friendly. In order to facilitate system erection and wiring, the electronic shelf label system generally adopts a wireless communication mode, so that the convenience of the actual application of the whole system is improved. However, in the situation of intensive use of electronic shelf labels in large quantities, such as a supermarket, tens of thousands to hundreds of thousands of electronic shelf labels may be required, and the problem of collision and collision between the price labels and the base stations of electronic goods is increasingly serious due to the high density of the electronic shelf labels.
As in the prior patent CN 203301483U, entitled "an electronic shelf label system based on multiple radio frequency base stations", includes: a commodity database for storing commodity information; the electronic shelf label server is connected with the commodity database and the plurality of relay stations; the relay stations are connected with the electronic shelf label server, each relay station is connected with the electronic shelf labels in a management range in a wireless mode, and each relay station comprises a plurality of radio frequency modules; and the electronic shelf labels are wirelessly connected with the relay station. Each relay station comprises 2 to 20 radio frequency modules. And the radio frequency modules in the relay stations are connected with the electronic shelf labels according to regions. And the radio frequency modules in the relay stations are connected with the electronic shelf labels according to commodity brands or commodity categories. The distance between the relay stations is more than or equal to 30 meters. The one relay station connects 2000 to 10000 electronic shelf labels. The electronic shelf label comprises a controller, a power supply module connected with the controller, a memory, a communication part and a display part. The power supply module is a battery. The power supply module is a solar power supply module. Although the electronic shelf label system based on the multi-radio-frequency base station can meet the situation that the electronic shelf labels are intensively used in large quantities (the management of the electronic shelf labels in large quantities is realized by increasing the number of radio-frequency modules in the relay station), the system has the disadvantages that the problem of collision and collision between the electronic shelf label and the base station still exists (the traditional mode is adopted, the label randomly and actively initiates heartbeat signals to the base station or the base station regularly awakens the base station, the collision probability of the communication signals in the mode needs to be linearly increased along with the increase of the number of the labels, and when the number of the labels available in the base station is large, the communication collision is frequent, so that the use of the system is seriously influenced); the increase of the number of the radio frequency modules not only increases the production cost of the system, but also improves the energy consumption of the system and increases the volume of the relay station; thirdly, the layout of the base stations in the system is relatively unreasonable, so that the energy consumption of the electronic shelf label is relatively large, and the maintenance frequency of the electronic shelf label is improved.
Disclosure of Invention
The design purpose is as follows: in order to avoid the defects in the background technology, the multi-base-station electronic tag system based on batch paging is designed, which can not only maintain the large-scale updating of the electronic shelf tags under the low collision probability, but also has the advantages of rapidness, accuracy and high efficiency in updating, simplified system layout and low maintenance frequency of the electronic shelf tags.
The design scheme is as follows: the design purpose is realized.
1. The base station can broadcast information containing the registered specific electronic shelf labels needing to be paged; the specific electronic shelf label can send the information to the base station after receiving the paging request of the base station; after receiving the response information of the electronic shelf labels or the batch of electronic shelf labels, the base station distributes new connection parameters one by one and sends the new connection parameters to the corresponding electronic shelf labels, and the base station sends the service data sent by the background management device to the electronic shelf labels through the newly distributed connection parameters, or after receiving the response information of the electronic shelf labels or the batch of electronic shelf labels, the base station can send the service data sent by the background management device to the electronic shelf labels in batches; the electronic shelf label can be displayed and updated according to the received service data, and the electronic shelf label can upload the current service state of the electronic shelf label to the background management device through the corresponding base station. The purpose of this design is: firstly, the base station can page a specific electronic shelf label in the radiation range of the base station according to the short address and the group number of the registered electronic shelf label, so that the base station can wake up the electronic shelf label in a directional mode (the electronic shelf label which is not paged is still in a semi-dormant state), and thus the electronic shelf label is wakened up as required, so that the communication pressure between the base station and the electronic shelf label is reduced, the communication quality between the base station and the electronic shelf label can be improved, and meanwhile, the communication error rate between the base station and the electronic shelf label is reduced, so that the probability of conflict is not increased along with the increase of the number of the labels; secondly, the specific electronic shelf label can send the self information to the base station after receiving the paging request of the base station, the base station receives the response of the electronic shelf label or the batch of electronic shelf labels, allocates new connection parameters and issues the new connection parameters to the corresponding electronic shelf labels, and the base station sends the service data issued by the background management device to the electronic shelf labels through the newly allocated connection parameters, so that the electronic shelf labels close to the base station emit signals at lower power by a method for controlling the emission power of the electronic shelf labels, the power consumption of the electronic shelf labels is reduced, and the maintenance frequency of the electronic shelf labels is further reduced; and thirdly, the background management device can enable the base station to issue the service data to the electronic shelf labels one by one or issue the service data to the electronic shelf labels in batches according to the size of the transmission information quantity, when the electronic shelf labels are required to be refreshed, the base station allocates new connection parameters one by one and issues the new connection parameters to the corresponding electronic shelf labels, the base station sends the service data issued by the background management device to the electronic shelf labels through the newly allocated connection parameters, and when the electronic shelf labels are required to be flashed, the base station can send the service data issued by the management device to the electronic shelf labels in batches, so that the working efficiency of the system is greatly improved.
2. The base station can receive the broadcast information of the electronic shelf label, after the base station receives the broadcast information of the unregistered electronic shelf label, the base station can upload the broadcast information of the electronic shelf label and the detected signal intensity information of the electronic shelf label to the background management device, and the background management device can compare the link quality values between the same electronic shelf label and different base stations and issue the design of the registration information of the electronic shelf label to the base station with the highest link quality value. The purpose of this design is: firstly, backstage management device can compare the link quality value between the same electronic shelf label and different base stations and issue the electronic shelf label registration information to the base station with the highest link quality value, registration between the electronic shelf label and the corresponding base station is realized, then the base station distributes new identity information to the registered electronic shelf label, the registration mechanism can greatly reduce the probability of communication collision between multiple base stations and mass electronic shelf labels, and the collision between the electronic shelf label and the base station is controlled within a reasonable range.
3. After the base station receives the registration information of the electronic shelf label issued by the background management device, the base station adds the information of the electronic shelf label into a base station registration list, and simultaneously, the base station distributes new identity information to the electronic shelf label and issues the new identity information to the electronic shelf label; the new identity information comprises a short address and a group number, and the design of the power and communication rate control parameters of the label, which is the third technical characteristic of the invention. The purpose of this design is: after the information of the electronic shelf label is added into the base station registration list, the base station distributes new identity information to the registered electronic shelf label and issues the new identity information to the electronic shelf label; the new identity information comprises a short address, a group number, the power of the label and communication control parameters, so that the base station is facilitated to effectively manage the electronic shelf label registered in the base station in an advanced manner, the communication collision conflict between the base station and the registered electronic shelf label in the base station is avoided, and the base station can quickly and accurately improve information to the registered electronic shelf label.
4. The base station stores a copy of channel state data of the base station, can maintain the channel state data in real time, and needs to switch channels randomly when sending data packets each time; the base station can update and maintain the information of ID, group number, short address, RSSI, online state and picture issuing times of the registered electronic shelf label in real time; the present invention is also characterized in that the base station is designed to periodically push the information to the station management apparatus. The purpose of this design is: the base station stores a copy of channel state data of the base station, and the base station can maintain the channel state data in real time, the base station needs to switch channels randomly when sending data packets every time, namely, the base station maintains idle channel information, and provides a selection channel for switching channels randomly when transmitting service data, thereby avoiding communication conflicts; and secondly, the base station can update and maintain the information of the ID, group number, short address, RSSI, online state and picture issuing times of the registered electronic shelf label in real time, the base station can regularly push the information to a management device, namely, the base station maintains the state information of the registered electronic shelf label and maintains the online or offline state of the electronic shelf label registered to the base station, when the offline time of a certain electronic shelf label is overtime, the base station can delete the electronic shelf label from a registered list, and the electronic shelf label needs to be registered again after the electronic shelf label is recovered to be normal next time, so that the base station can clear the registered offline electronic shelf label and receive and register a new electronic shelf label, thereby improving the effective utilization rate of the base station.
5. The base stations are distributed in a honeycomb shape, the vertex angles of a regular hexagon in the honeycomb shape are respectively provided with one base station, the center of the regular hexagon is provided with one base station, and the distances from the center to all the vertex angles of the regular hexagon are the same. The purpose of this design is: the base stations are distributed in a honeycomb shape, the vertex angles of a regular hexagon in the honeycomb shape are respectively provided with one base station, the center of the regular hexagon is provided with one base station, the distances from the center to each vertex angle of the regular hexagon are the same, a network formed by the regular hexagons is the same as the honeycomb, the base stations required by covering a service area by the network are the least, the most economical is realized, and the production cost of the system can be reduced; in addition, in the equilateral triangle area formed by the three base stations, the area can be fully covered by at least three non-overlapping frequency bands, so that the system setting is simplified.
6. The frequency bands of the base stations distributed in the honeycomb shape are at least three non-overlapping frequency bands, and the design that the frequency bands of any two base stations which are equidistant and adjacent in the regular hexagon are not overlapped is the sixth technical characteristic of the invention. The purpose of this design is: the use frequency band of the base stations distributed in a honeycomb manner is at least three non-overlapping frequency bands, and the use frequency bands of any two base stations adjacent to each other in a regular hexagon at equal intervals are not overlapped, so that the communication interference between the base stations, the communication interference between the base stations and the electronic shelf labels and the communication interference between the electronic shelf labels and the electronic shelf labels are avoided, and the communication conflict inside the system is realized.
7. The design of eight channels in three or more non-overlapping frequency band intervals of the base station is the seventh technical characteristic of the invention. The purpose of this design is: the arrangement of eight channels and 8 channels in three or more non-overlapping frequency band intervals of the base station enables the base station to better avoid the interference of other signal frequencies, for example, when the initial channel frequency of F1, F2 and F3 allocated to a certain cell according to the plan conflicts with the frequency of other equipment, the base station can jump to other channel frequencies, thereby avoiding the conflict and avoiding the communication conflict after external equipment is accessed into the system.
8. The invention is characterized in that the background management device can instruct one base station and the electronic shelf label to realize the registration design when the background management device identifies that the link quality values between the same electronic shelf label and two or three base stations are the same value. The purpose of this design is: when the background management device identifies that the link quality values between the same electronic shelf label and two or three base stations are the same, the background management device can instruct one of the base stations to register with the electronic shelf label, so that the electronic shelf labels at special positions can be quickly and orderly registered with the corresponding base stations.
The technical scheme is as follows: a multi-base-station electronic label system based on batch paging comprises a background management device, a plurality of base stations and a plurality of electronic shelf labels, wherein the base stations can broadcast information containing registered specific electronic shelf labels needing paging; the specific electronic shelf label can send the information to the base station after receiving the paging request of the base station; after receiving the response information of the electronic shelf labels or the batch of electronic shelf labels, the base station allocates new connection parameters one by one and issues the new connection parameters to the corresponding electronic shelf labels, and the base station sends the service data issued by the background management device to the electronic shelf labels through the newly allocated connection parameters, or after receiving the response information of the electronic shelf labels or the batch of electronic shelf labels, the base station can send the service data issued by the background management device to the electronic shelf labels in batches; the electronic shelf label can be displayed and updated according to the received service data, and the electronic shelf label can upload the current service state of the electronic shelf label to the background management device through the corresponding base station.
Compared with the background technology, the system solves the problem of high communication conflict probability between a large number of electronic shelf labels and a base station through a batch limited paging awakening mechanism, so that the conflict probability is not increased along with the increase of the number of the electronic shelf labels; secondly, the system effectively controls the whole system to be maintained under the low conflict probability by means of reducing internal communication conflicts and external conflicts; thirdly, the system also enables the tags close to the base station to transmit signals at lower power by a method of controlling the transmission power of the electronic shelf tags, thereby reducing the power consumption of the tags; and fourthly, the system label is in a dormant or monitoring state most of the time, and the system power consumption of the label is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a multi-base-station electronic tag system based on batch paging.
Fig. 2 is a flowchart of registering an electronic shelf label B with a corresponding base station a, where the label is referred to as an electronic shelf label for short.
Fig. 3 is a flowchart of paging a specific electronic shelf label B and issuing service data by a base station a, where the label is referred to as an electronic shelf label for short.
Fig. 4 is a schematic plan view of frequency radiation when each base station is applied, the frequency radiation range of the base station is circular and the base station is arranged on the center of the circle.
Detailed Description
Example 1: reference is made to figures 1-4 of the drawings. A multi-base station electronic label system based on batch paging comprises a background management device 1, a plurality of base stations 2 and a plurality of electronic shelf labels 3, wherein the base stations 2 can broadcast information containing registered specific electronic shelf labels 3 to be paged; the specific electronic shelf label 3 can send self information to the base station 2 after receiving a paging request of the base station 2, the base station 2 distributes new connection parameters one by one and sends the new connection parameters to the corresponding electronic shelf labels 3 after receiving response information of the electronic shelf label or the batch of electronic shelf labels 3, and the base station 2 sends service data issued by the background management device 1 to the electronic shelf labels 3 through the newly distributed connection parameters, or the base station 2 can send the service data issued by the background management device 1 to the electronic shelf labels 3 in batches after receiving the response information of the electronic shelf label or the batch of electronic shelf labels 3; the electronic shelf label 3 can perform display updating according to the received service data, and the electronic shelf label 3 can upload the current service state to the background management device 1 through the corresponding base station 2; when the electronic shelf label 3 is required to be subjected to image brushing (namely, the electronic shelf label 3 changes the display content, and the amount of information to be transmitted is large at this time), the base station 2 allocates new connection parameters one by one and issues the new connection parameters to the corresponding electronic shelf label 3, and the base station 2 sends the service data issued by the background management device 1 to the electronic shelf label 3 through the newly allocated connection parameters; when the electronic shelf label 3 is required to flash (a plurality of lamps are arranged on the surface shell of the electronic shelf label 3, the electronic shelf label 3 with the lamps is convenient for a user to pick up goods, and the quantity of information to be transmitted is small during the flashing operation), the base station 2 can send the service data issued by the management device 1 to the electronic shelf label 3 in batches; the background management device 1 can determine the amount of information to be transmitted and instruct the base station 2 to issue the service data to the electronic shelf labels 3 one by one or issue the service data to the electronic shelf labels 3 in batches according to the amount of the transmitted information. The background management device 1 comprises a central server or a cloud platform and a user terminal. The information of the base station 2 broadcast paging comprises the short address and the group number of the registered specific electronic shelf label 3; the number of the specific electronic shelf labels 3 is one or more, and the plurality may be a plurality of the same set or all of the sets, or a plurality of sets or all of the sets.
The electronic shelf label 3 can broadcast basic information of the electronic shelf label 3 at regular intervals, the electronic shelf label 3 can broadcast information once at an interval of 10 seconds when being in an unregistered state, the base station 2 can receive the broadcast information of the electronic shelf label 3, after the base station 2 receives the broadcast information of the unregistered electronic shelf label 3, the base station 2 can upload the broadcast information of the electronic shelf label 3 and detected signal strength information of the electronic shelf label 3 to the background management device 1, the background management device 1 can compare link quality values between the same electronic shelf label 3 and different base stations 2 and issue the registration information of the electronic shelf label 3 to the base station 2 with the highest link quality value, namely, when the broadcast information of the unregistered electronic shelf label 3 is monitored (received by the base stations 2 in an area), and because the electronic shelf label 3 is unregistered, each monitored base station 2 uploads the information of the electronic shelf label 3 and the link quality value of information transmitted between the base station 2 and the electronic shelf label 3 to the background management device 1, and the background management device 1 can realize the highest link quality value of the electronic shelf label 3 corresponding to the background management device 1. After the connection is established between the base station 2 and the tag electronic shelf label 3, service data such as pictures and the like are transmitted between the base station and the tag electronic shelf label by adopting a frequency hopping algorithm, so that channel collision is avoided, wherein the frequency hopping algorithm is the prior art and is not repeated herein.
After the base station 2 receives the registration information of the electronic shelf label 3 issued by the background management device 1, the base station 2 adds the information of the electronic shelf label 3 into the registration list of the base station 2, and simultaneously the base station 2 allocates new identity information to the electronic shelf label 3 and issues the new identity information to the electronic shelf label 3; the new identity information comprises a short address, a group number, power of the label and communication rate control parameters; each base station 2 may register 3000-4000 electronic shelf labels 3.
Processing inside the base station 2: the method comprises the steps that (1) base station idle channel information maintenance is carried out, namely, a copy of channel state data of a base station is stored in a base station 2, the base station 2 can maintain the channel state data in real time and record a currently used channel and a currently idle channel, and the base station 2 needs to randomly switch channels when sending a data packet each time; the base station 2 scans idle channels periodically, the base station 2 updates state list data periodically, and the base station 2 is provided with a channel allocation state timeout mechanism. (2) The method comprises the steps that base station registered label state information maintenance is carried out, namely the base station 2 can update and maintain information of ID, group number, short address, RSSI, online state and picture issuing times of a registered electronic shelf label 3 in real time, and the base station 2 can push the information to a platform management device 1 regularly; the periodic push time is once in 60 seconds. (3) And log processing is performed, namely, each link of the base station performs log record in the process of processing data, such as data received or data sent to the next link, so that support can be provided for fault diagnosis of the system, and operation and maintenance work is served.
The base stations 2 are distributed in a honeycomb shape, the vertex angles of regular hexagons in the honeycomb shape are respectively provided with one base station 2, the positive center of each regular hexagon is provided with one base station 2, and the distance from the positive center to each vertex angle of each regular hexagon is the same. The base station 2 is an ESL base station.
The use frequency bands of the base stations 2 distributed in the honeycomb shape are at least three non-overlapping frequency bands, and the use frequency bands of any two base stations 2 adjacent to each other in the regular hexagon are not overlapped. Eight channels are provided in three or more non-overlapping frequency band intervals of the base station 2. Assuming that three non-overlapping frequency bands that can be used by the base station 2 are F1, F2, and F3, respectively, since F1, F2, and F3 are non-overlapping frequency bands, the planar coverage application can cover an infinite area, and an area covered by two or three frequencies at the same time is called an "overlapping area". F1, F2 and F3 are configurable constants of the base station 2, and 8 channels in F1, F2 and F3 of the base station 2 can be used to avoid frequency interference of other signals, i.e. when the starting channel frequency allocated to its F1, F2 and F3 by planning in a certain cell conflicts with the frequency of other devices, the cell can jump to other channel frequencies. The neighboring base stations 2 of any one of the base stations 2 in the cellular distribution may have 6 different frequency points at most, and 2 different frequency points at least (such as the above F1, F2, and F3 frequency points).
The distance between any two base stations 2 in the regular hexagon is 30-40 meters, the three base stations 2 on the same equilateral triangle in the regular hexagon use frequency bands which are not overlapped, the radiation circles formed by the three base stations 2 have overlapped areas covered by the three radiation circles at the same time, and the radius of the radiation circle formed by the base station 2 is smaller than the distance between any two base stations 2 in the regular hexagon. When the background management device 1 identifies that the link quality values between the same electronic shelf label 3 and two or three base stations 2 are the same, the background management device 1 can instruct one of the base stations 2 to register with the electronic shelf label 3.
The system processing flow is as follows:
step one, the electronic shelf label 3 can broadcast basic information (the basic information includes a registration state) of the electronic shelf label 3 at regular intervals, that is, the unregistered electronic shelf label 3 can broadcast unregistered information at intervals of T (T represents a time value, and if T =10 seconds, it represents 10 seconds);
step two, after receiving the broadcast information of the unregistered electronic shelf label 3, the base station 2 uploads the broadcast information of the electronic shelf label and the detected signal strength information (link quality value) of the electronic shelf label to the background management device 1, and the base station 2 monitors the broadcast of the electronic shelf label 3 and reports the broadcast to the background; the background management device 1 can compare the link quality values between the same electronic shelf label 3 and different base stations 2 and issue the registration information of the electronic shelf label 3 to the base station 2 with the highest link quality value, namely the background selects the optimal base station A to issue the label registration information;
step three, after the base station 2 receives the registration information of the electronic shelf label 3 issued by the background management device 1, the base station 2 adds the information of the electronic shelf label 3 into a registration list of the base station 2, and simultaneously the base station 2 allocates new identity information to the electronic shelf label 3 and issues the new identity information to the electronic shelf label 3; the new identity information comprises a short address, a group number, power of the tag and communication rate control parameters, namely registration information of the tag receiving base station;
step four, the registered tag (electronic shelf tag 3) end broadcasts heartbeat information at a certain interval (N x T, which may be 60 seconds or even longer), the base station a (base station 2) monitors the heartbeat information of the tag (electronic shelf tag 3) and maintains the registration information (i.e. the registered electronic shelf tag 3 and the corresponding base station 2 maintain the registration relationship), and the registered electronic shelf tag 3 broadcasts the heartbeat information at a longer interval, so that the energy consumption of the registered electronic shelf tag 3 can be reduced.
Step five, the base station 2 broadcasts and pages the registered specific electronic shelf label 3, namely the base station A initiates paging broadcast information;
step six, after receiving the paging request of the base station 2, the electronic shelf label 3 sends the information of the electronic shelf label 3 to the base station 2, namely the electronic shelf label 3 monitors the paging broadcast of the base station at a receiving window, and then the clicked electronic shelf label 3 responds information to the base station A;
step seven, when the amount of the service data information issued by the background management device 1 is large (if the electronic shelf label 3 is required to be refreshed), the base station 2 receives the response of the electronic shelf label 3, allocates a new connection parameter and issues the new connection parameter to the corresponding electronic shelf label 3, namely, the base station A monitors the paging response information of the electronic shelf label 3 and issues the frequency hopping connection parameter for the second time corresponding to the electronic shelf label 3; the base station 2 sends the service data issued by the background to the electronic shelf label 3 on the newly allocated connection parameter, namely the electronic shelf label 3 monitors the secondary issuing connection parameter of the base station A and the electronic shelf label 3 receives the service data of the base station by the frequency hopping connection parameter, and the base station issues the service data by the new connection parameter, so that the base station pages the specific electronic shelf label 3 and issues the service data to the electronic shelf label 3; when the amount of the service data information issued by the background management device 1 is small (for example, the electronic shelf label 3 is required to flash), after the base station 2 receives the response of the electronic shelf label 3, the base station 2 issues the service data to the electronic shelf labels 3 in batches.
Step eight, the electronic shelf label 3 receives the service data on the new connection parameters, and transmits the service state (the service state refers to the processing results of services such as image brushing and flashing of the system of the electronic shelf label 3, such as success or failure of image brushing and success or failure of flashing of the electronic shelf label 3) to the base station 2, and the base station 2 returns the service state to the background management device 1 after receiving the service state.
To maximize the battery life of the terminals (electronic shelf labels 3) and to extend the network capacity, 2.4G proprietary protocol networks use rate Adaptation (ADR) mechanisms to manage the rate and RF output of each terminal (electronic shelf labels 3) independently. Each device may transmit data using any data rate on any available channel, at any time, as long as the following specifications are observed:
1. each transmission by a terminal changes the channel in a pseudo-random manner.
2. The terminal is to comply with the maximum transmission duty cycle requirements in the radio specifications of the respective frequency band and local area.
3. The terminal is to comply with the maximum transmission time requirements in the radio specifications of the respective frequency band and local area.
Example 2: example 1. When the link quality values of two or three broadcast data packets received by the electronic shelf label 3 are the same, the electronic shelf label 3 actively registers with the base station 2 with the highest link quality value and the earliest received broadcast data packet.
It is to be understood that: although the above embodiments have described the design idea of the present invention in more detail, these descriptions are only simple descriptions of the design idea of the present invention, and are not limitations of the design idea of the present invention, and any combination, addition, or modification without departing from the design idea of the present invention falls within the scope of the present invention.
Claims (9)
1. The utility model provides a polybase station electronic tags system based on paging in batches, includes backstage management device (1), a plurality of basic station (2) and a plurality of electronic shelf label (3), characterized by: the base station (2) can broadcast information containing the registered specific electronic shelf labels (3) to be paged; the specific electronic shelf label (3) can send self information to the base station (2) after receiving a paging request of the base station (2); after receiving the response information of the one or more electronic shelf labels (3), the base station (2) allocates new connection parameters one by one and issues the new connection parameters to the corresponding electronic shelf labels (3), and the base station (2) sends the service data issued by the background management device (1) to the electronic shelf labels (3) through the newly allocated connection parameters, or after receiving the response information of the one or more electronic shelf labels (3), the base station (2) can send the service data issued by the background management device (1) to the electronic shelf labels (3) in batches; the electronic shelf label (3) can be displayed and updated according to the received service data, and the electronic shelf label (3) can upload the current service state to the background management device (1) through the corresponding base station (2); the electronic shelf label (3) can broadcast basic information of the electronic shelf label (3) at regular intervals, the base station (2) can receive broadcast information of the electronic shelf label (3), the base station (2) can upload the broadcast information of the electronic shelf label (3) and detected signal strength information of the electronic shelf label (3) to the background management device (1) after the base station (2) receives the broadcast information of the unregistered electronic shelf label (3), and the background management device (1) can compare link quality values between the same electronic shelf label (3) and different base stations (2) and issue the registration information of the electronic shelf label (3) to the base station (2) with the highest link quality value.
2. The system of claim 1, wherein the system comprises: the information of the base station (2) broadcast paging comprises the short address and the group number of the registered specific electronic shelf label (3); the number of the specific electronic shelf labels (3) is one or more, and the plurality may be a plurality of the same set or all of the sets, or a plurality of sets or all of the sets.
3. The system of claim 1, wherein the system comprises: after the base station (2) receives the registration information of the electronic shelf label (3) issued by the background management device (1), the base station (2) adds the information of the electronic shelf label (3) into a registration list of the base station (2), and meanwhile, the base station (2) distributes new identity information to the electronic shelf label (3) and issues the new identity information to the electronic shelf label (3); the new identity information comprises a short address and a group number, as well as power and communication rate control parameters of the tag.
4. The system of claim 1, wherein the system comprises: the base station (2) stores a copy of channel state data of the base station, the base station (2) can maintain the channel state data in real time, and the base station (2) needs to switch channels randomly when sending data packets each time; the base station (2) can update and maintain the information of ID, group number, short address, RSSI, online state and picture issuing times of the registered electronic shelf label (3) in real time; the base station (2) can push the information to the background management device (1) periodically.
5. The system of claim 1, wherein the system comprises: a plurality of basic stations (2) are honeycomb distribution, and the apex angle punishment of regular hexagon in the honeycomb is equipped with a basic station (2) respectively, the positive center of regular hexagon is equipped with a basic station (2) and the distance that the positive center reaches each apex angle of this regular hexagon all is the same.
6. The system of claim 5, wherein the system comprises: the use frequency bands of the base stations (2) distributed in a honeycomb shape are at least three non-overlapping frequency bands, and the use frequency bands of any two base stations (2) which are equidistant and adjacent in the regular hexagon are not overlapped.
7. The system of claim 5 or 6, wherein the system comprises: eight channels are arranged in three or more non-overlapping frequency band intervals of the base station (2).
8. The system of claim 5 or 6, wherein the system comprises: the distance between any two base stations (2) which are equidistant and adjacent in the regular hexagon is 30-40 meters, the frequency bands used by the three base stations (2) which are positioned on the same equilateral triangle in the regular hexagon are not overlapped, the radiation circles formed by the three base stations (2) have overlapped areas covered by the three radiation circles at the same time, and the radius of the radiation circle formed by the base stations (2) is smaller than the distance between any two base stations (2) which are equidistant and adjacent in the regular hexagon.
9. The system of claim 5 or 6, wherein the system comprises: when the background management device (1) identifies that the link quality values between the same electronic shelf label (3) and two or three base stations (2) are the same, the background management device (1) can instruct one of the base stations (2) to register with the electronic shelf label (3).
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| CN114286430A (en) * | 2021-11-19 | 2022-04-05 | 北京博大光通物联科技股份有限公司 | Wireless awakening mechanism and image putting method applied to electronic paper handle ring |
| CN114786172B (en) * | 2022-04-14 | 2023-03-24 | 广州计量检测技术研究院 | Automatic upgrading method and system for electronic tag and electronic tag |
| TWI821119B (en) * | 2023-02-15 | 2023-11-01 | 研華股份有限公司 | Communication channel switching method and system |
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