CN109547578B - Networking method for electronic price tag system - Google Patents
Networking method for electronic price tag system Download PDFInfo
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- CN109547578B CN109547578B CN201910049764.2A CN201910049764A CN109547578B CN 109547578 B CN109547578 B CN 109547578B CN 201910049764 A CN201910049764 A CN 201910049764A CN 109547578 B CN109547578 B CN 109547578B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
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Abstract
The invention discloses a networking method for an electronic price tag system, which relates to the technical field of electronic price tag networking and comprises the following steps of: randomly selecting time within a preset time interval to wake up and send broadcast information to a gateway; time zone configuration step: configuring a time zone for the electronic price tag and sending time zone parameter information to the electronic price tag; and a wake-up time selection step: when the time zone parameter information is not acquired within the preset time, entering a sleep mode, and selecting the awakening time within the next time interval; time calculation step: and when the time zone parameter information is acquired within the preset time, stopping sending the broadcast information requesting to allocate the time zone, entering a sleep mode, and calculating the time for sending the data updating request information when the next time is awakened. The invention realizes automatic and rapid networking of a plurality of electronic price tags and the gateway by segmenting the electronic price tags and randomly waking up in a segmented time to send broadcast information so as to reduce the network collision probability.
Description
Technical Field
The invention relates to the technical field of electronic price tag networking, in particular to a networking method for an electronic price tag system.
Background
An electronic shelf label is an electronic display device which is placed on a shelf and can replace the traditional paper price label. And each electronic shelf label is connected with a cloud commodity library of a shopping mall through a wired or wireless network, and the latest commodity price is displayed through a screen on the electronic shelf label. By using the system, the price display of the electronic shelf label can be changed in real time when the price of the commodity is changed.
When the existing electronic price tags and gateways are networked, generally, broadcast information requesting networking is sent to the gateways when the electronic price tags are started, when a large number of electronic price tags send the broadcast information to the gateways at the same time, data transmission collision can be caused, and the problems of easy congestion and large span of networking time are caused.
Disclosure of Invention
The invention aims to provide a networking method for an electronic price tag system, which is used for realizing automatic and rapid networking of a plurality of electronic price tags and a gateway by segmenting the electronic price tags and randomly waking up in a segmented time to send broadcast information so as to reduce the network collision probability and improve the channel utilization rate.
In order to solve the technical problems, the basic scheme provided by the invention is as follows:
the networking method for the electronic price tag system comprises the following steps:
and a data dynamic sending step: the electronic price tag randomly selects time to wake up in a preset time interval to enter an awakening mode, and sends broadcast information requesting to allocate a time zone to a gateway;
a verification step: when the gateway listens to the broadcast information, judging whether the electronic price tag sending the broadcast information is added into the network according to the broadcast information;
time zone configuration step: when judging that a certain electronic price tag is not added to the network, configuring a time zone for the electronic price tag and sending time zone parameter information to the electronic price tag;
and a wake-up time selection step: when the time zone parameter information is not acquired within the preset time, switching the awakening mode into the sleeping mode, and selecting the time for awakening and sending the broadcast information requesting to allocate the time zone within the next time interval;
time calculation step: when the time zone parameter information is acquired within the preset time, stopping sending the broadcast information requesting to allocate the time zone, switching the wake-up mode to the sleep mode, and calculating the time for sending the data updating request information in the next wake-up according to the time zone parameter information.
According to the technical scheme, before the electronic price tags are not added into the network, most of the time is in dormancy, the time interval is planned in advance through an internal timer, specifically, a time interval is planned in advance for each electronic price tag, the electronic price tag randomly selects a time to wake up and send broadcast information to the gateway in the preset time interval, namely, the gateway is requested to allocate a time zone, and the electronic price tag starts to wait for the feedback of the gateway.
When the gateway senses the broadcast information from the electronic price tag, whether the electronic price tag is added to the network is judged according to the bit in the broadcast information, and when one electronic price tag is judged not to be added to the network, a time zone is configured for the electronic price tag and time zone parameter information is sent to the electronic price tag, so that different electronic price tags occupy different time zones.
If the electronic price tag does not receive time zone parameter information from the gateway within the preset time, switching the awakening mode to the sleeping mode, selecting the awakening time within the next time interval, so that the electronic price tag continues sleeping, awakening within the next time interval according to the previously selected time, and sending the broadcast information to the gateway again, namely trying to form a network with the gateway again; if the time zone parameter information from the gateway is received within the preset time, which indicates that the gateway allocates a time zone to the electronic price tag, the transmission of the broadcast information requesting the allocation of the time zone is stopped, the networking is also completed, the wake-up mode is switched to the sleep mode, and the electronic price tag calculates the time for sending the data updating request information when waking up next time according to the time zone parameter information, namely, the electronic price tag wakes up next time to establish connection with the gateway so as to update the data of the electronic price tag.
The invention has the beneficial effects that:
1. the electronic price tag randomly selects time within a preset time interval to wake up and send broadcast information requesting for distributing time zones, and the rest time is in a dormant state, so that power consumption is saved; the time for sending the broadcast information by the electronic price tags is segmented by combining with an ALOHA protocol, and the wake-up time of the electronic price tags is randomly selected, so that the wake-up time of different electronic price tags is different, the network collision probability when a plurality of electronic price tags are networked with the gateway is reduced, the collision quantity is reduced, the utilization rate of a channel is improved, and the rapid automatic networking of a large number of electronic price tags is realized.
2. In the networking process, the gateway can allocate respective time zones to each electronic price tag, one gateway is responsible for managing a plurality of electronic price tags, each electronic price tag occupies one time zone, the electronic price tags calculate the time for sending data updating request information when waking up next time according to the own time zone, the time for sending the data updating request information to the gateway when waking up by different electronic price tags is different, the orderly communication between the electronic price tags and the gateway is realized, the condition of collision and interference when countless electronic price tags are communicated with the gateway is avoided, and further the loss of information is avoided.
Further, the data dynamic sending step: the awakening time of the electronic price tag in a preset time interval is taken as starting time, and broadcasting information requesting for distributing time zones is sequentially sent to the gateway on different frequency bands in a preset time interval by starting the starting time;
the awakening time selection step: and when the time zone parameter information is not acquired in a certain time interval, switching the awakening mode into the sleeping mode, and selecting the awakening time in the next time interval.
When the electronic price tag is awakened in a certain time interval, a first frequency band is selected to send broadcast information requesting for allocating a time zone, whether time zone parameter information from the gateway is received or not is judged, when the time zone parameter information from the gateway is not received in the time interval, the next frequency band is selected to send the broadcast information requesting for allocating the time zone, and the electronic price tag does not stop sending the broadcast information requesting for allocating the time zone until the electronic price tag obtains the time zone parameter information; if the time zone parameter information of the gateway is not acquired in a certain time interval, namely the broadcast information sent on all frequency bands by the electronic price tag is not fed back by the gateway, the sleep mode is entered, and the awakening time in the next time interval is selected to resend the broadcast information requesting for time zone allocation.
Furthermore, the electronic price tag is connected with the gateway through Bluetooth, and the electronic price tag selects a frequency band according to a Bluetooth BLE protocol to send broadcast information requesting time zone allocation to the gateway.
The electronic price tag and the gateway adopt a Bluetooth connection communication mode, so that the power consumption and the cost of data transmission can be reduced; the electronic price tag sends broadcast information on high, medium and low frequency bands according to a Bluetooth BLE protocol, so that the power consumption is reduced, and meanwhile, the data transmission efficiency is improved.
Further, the gateway includes a batch joining mode and a single device joining mode, and further includes:
a mode switching step: and the manager switches the batch joining mode and the single-equipment joining mode of the gateway.
The networking mode is provided, so that the networking becomes more flexible and humanized; when in batch join mode, allowing a large number of electronic price tags to join the network; when in the single device join mode, a designated electronic price tag may be allowed to join the network.
Further, the verifying step: when the gateway is in a batch joining mode, if the broadcast information is intercepted, judging whether the electronic price tag for sending the broadcast information is joined into the network according to the broadcast information; further comprising:
a device list generation step: when the gateway is in a single-device adding mode, a manager inputs device information of an electronic price tag needing to be added into the network and generates a new device list;
the time zone configuration step: when the gateway is in the single-device joining mode, if the broadcast information of the electronic price tag in the new device list is received, configuring a time zone for the electronic price tag and sending time zone parameter information to the electronic price tag.
When the gateway is in a batch joining mode, whether time zones are allocated or not is judged according to whether electronic price tags are added to the network or not, but when the gateway is in a single-device joining mode, the time zones are allocated according to a new device list, specifically, when a small amount of electronic price tags are required to be added to the network, device information of the electronic price tags is input, a device list generating module generates a new device list according to the device information of the electronic price tags, and if the gateway receives broadcast information of the electronic price tags in the new device list, the time zones are configured for the electronic price tags.
Further, the device list generating step: and generating a device list by the electronic price tags which are added into the network, wherein the device list comprises the device information of each electronic price tag.
When the electronic price tags are successfully networked, the equipment list generating module can generate an equipment list from all the electronic price tags added into the network, so that management personnel can conveniently check and manage the electronic price tags through the equipment list.
Drawings
FIG. 1 is a schematic block diagram of an embodiment of a networking method for an electronic price tag system of the present invention;
FIG. 2 is a flow chart of a networking method for an electronic price tag system of the present invention;
FIG. 3 is a timing diagram of broadcast information transmission for an embodiment of a networking method for an electronic price tag system of the present invention;
fig. 4 is a functional relationship diagram of load and throughput of the Pure Aloha network according to the embodiment of the networking method for the electronic price tag system of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
in order to more clearly illustrate the networking method for the electronic price tag system of the present invention, in this embodiment, an electronic price tag system is further disclosed, as shown in fig. 1, the electronic price tag includes an electronic price tag and a gateway connected to a network.
One, electronic price tag
The invention discloses an electronic price tag, as shown in figure 1, comprising:
the data dynamic sending module is used for randomly selecting time to wake up in a preset time interval to enter a wake-up mode, taking the wake-up time as starting time, and sequentially sending broadcast information requesting to allocate time zones to the gateway on different frequency bands in a preset time interval by starting the starting time; the electronic price tag comprises a sleep mode and an awakening mode, and before the electronic price tag is not added into the network, most of the time is in sleep, and the electronic price tag is awakened irregularly through an internal timer; specifically, each electronic price tag is pre-defined with a time interval, and randomly selects a time to wake up and send broadcast information to the gateway within the preset time interval, namely, the gateway is requested to allocate a time zone and starts to wait for the feedback of the gateway; in this embodiment, the electronic price tag selects a frequency band according to a bluetooth BLE protocol, specifically, the frequency band includes a high frequency band, a medium frequency band and a low frequency band, when the electronic price tag wakes up, the low frequency band is selected to send broadcast information first, if no feedback from the gateway is received within a preset time interval, the medium frequency band is selected to send broadcast information, and if no feedback from the gateway is received within the preset time interval, the high frequency band is selected to send broadcast information continuously.
The judging module is used for judging whether time zone parameter information from the gateway is received in a preset time interval or not; specifically, the preset time interval is smaller than the preset time interval;
the wake-up time selection module is used for switching the wake-up mode into the sleep mode when the time zone parameter information of the gateway is not acquired in a certain time interval, and selecting the time for waking up and sending the broadcast information of the request distribution time zone in the next time interval; specifically, if the time zone parameter information from the gateway is not received in the preset time interval, the wake-up mode is switched to the sleep mode, the wake-up time in the next time interval is selected, and therefore the electronic price tag continues to sleep, wakes up in the next time interval according to the previously selected time, and sends the broadcast information to the gateway again.
And the time calculation module is used for stopping sending the broadcast information requesting to allocate the time zone when the time zone parameter information of the gateway is acquired, switching the awakening mode into the sleeping mode, and calculating the time for sending the data updating request information when the gateway wakes up next time according to the time zone parameter information. Specifically, if the time zone parameter information from the gateway is received in the preset time interval, which indicates that the gateway has allocated a time zone to the electronic price tag, the sending of the broadcast information requesting the allocation of the time zone is stopped, so that networking is completed, the wakeup mode is switched to the sleep mode, and the electronic price tag calculates the time for sending the data update request information when waking up next time according to the time zone parameter information, that is, the electronic price tag wakes up next time to establish connection with the gateway to update the data of the electronic price tag.
Second, gateway
The present invention also discloses a gateway connected with the electronic price tag, in this embodiment, the electronic price tag is connected with the gateway through bluetooth, as shown in fig. 1, the gateway includes a batch joining mode and a single device joining mode, and further includes:
the mode switching module is used for switching a batch joining mode and a single equipment joining mode of the gateway by a manager; the networking mode is provided, so that the networking becomes more flexible and humanized; when in batch join mode, allowing a large number of electronic price tags to join the network; when the device is in the single-device joining mode, the appointed electronic price tag can be allowed to join the network;
the verification module is used for judging whether the electronic price tag sending the broadcast information is added into the network according to the broadcast information when the gateway is in a batch adding mode and if the broadcast information is intercepted; specifically, whether the electronic price tag is added to the network is judged according to the bit in the broadcast information;
the time zone configuration module is used for configuring a time zone for an electronic price tag and sending time zone parameter information to the electronic price tag when judging that the electronic price tag is not added to the network;
the device list generating module is used for inputting device information of the electronic price tags needing to be added into the network by a manager when the gateway is in a single device adding mode and generating a new device list;
the time zone configuration module is also used for configuring a time zone for the electronic price tag and sending time zone parameter information to the electronic price tag if receiving the broadcast information of the electronic price tag in the new equipment list when the gateway is in the single equipment adding mode;
the device list generating module is further configured to generate a device list from the electronic price tags added to the network, where the device list includes device information of each electronic price tag. When the electronic price tags are successfully networked, the equipment list generating module can generate an equipment list from all the electronic price tags added into the network, so that management personnel can conveniently check and manage the electronic price tags through the equipment list.
The networking method for the electronic price tag system, disclosed by the invention, comprises the following steps as shown in figure 2:
and a data dynamic sending step: the electronic price tag randomly selects time to wake up in a preset time interval to enter a wake-up mode, the wake-up time is used as starting time, and the starting time is used for sequentially sending broadcast information requesting to allocate time zones to a gateway on different frequency bands in a preset time interval;
a verification step: when the gateway is in a batch joining mode, if the broadcast information is intercepted, judging whether the electronic price tag for sending the broadcast information is joined into the network according to the broadcast information;
time zone configuration step: when judging that a certain electronic price tag is not added to the network, configuring a time zone for the electronic price tag and sending time zone parameter information to the electronic price tag;
and a wake-up time selection step: when time zone parameter information is not acquired in a certain time interval, switching the wake-up mode into a sleep mode, and selecting the time for waking up and sending the broadcast information requesting to allocate the time zone in the next time interval;
time calculation step: when time zone parameter information is acquired within preset time, stopping sending broadcast information requesting for distributing time zones, switching an awakening mode into a sleeping mode, and calculating the time for sending data updating request information when the data updating request information wakes up next time according to the time zone parameter information;
a device list generation step: when the gateway is in a single-device adding mode, a manager inputs device information of an electronic price tag needing to be added into the network and generates a new device list; generating an equipment list by using the electronic price tags added into the network, wherein the equipment list comprises equipment information of each electronic price tag;
the time zone configuration step: when the gateway is in the single-device joining mode, if the broadcast information of the electronic price tag in the new device list is received, configuring a time zone for the electronic price tag and sending time zone parameter information to the electronic price tag.
The example concrete networking steps are as follows:
s1: setting a preset time interval: assuming that a gateway is responsible for managing 1024 electronic price tags at most, each electronic price tag wakes up for 15.36 seconds on average to send broadcast information to the gateway once, that is, the preset time interval is 15.36 seconds, based on such a total time span and the number of devices, a gateway will maintain 1024 time zones which are mutually exclusive and span 15.36/1024 ═ 15 milliseconds.
S2: randomly selecting time to wake up within a time interval of 15.36 seconds, namely switching from a sleep mode to an awake mode, taking the wake-up time as starting time, and starting from the starting time to sequentially send broadcast information requesting to allocate time zones to a gateway on different frequency bands within a preset time interval; as shown in fig. 3, the high frequency band, the middle frequency band and the low frequency band of this embodiment are frequency bands 37, 38 and 39, respectively, after the frequency band 37 sends the broadcast information (ADV _ IND) requesting to allocate a time zone, if the reply of the gateway is not received, after a period of time, for example, 1.25 ms, it sends another broadcast information requesting to allocate a time zone in the frequency band 38, at this time, if the gateway receives the broadcast information and feeds back the information to the electronic price tag time zone parameter information at an interval time (T _ IFS) defined by the bluetooth specification, it indicates that the electronic price tag succeeds, the electronic price tag stops sending the broadcast information requesting to allocate a time zone, switches the awake mode to the sleep mode, and calculates the time for sending the data update request information next time according to the time zone networking parameter information.
S3: if the broadcast information is sent on the frequency bands 37, 38, and 39, and the time zone parameter information fed back by the gateway has not been received after the interval time of 1.25 milliseconds after the broadcast information is sent on the frequency band 39, it indicates that the electronic price tag networking is not successful, the wake-up mode is switched to the sleep mode, and the wake-up time in the next time interval of 15.36 seconds is selected, that is, the next wake-up is required to try to perform networking with the gateway again.
1. When the gateway is in batch joining mode
When the gateway is in the batch join mode, electronic price tags are allowed to join the network in bulk. This is typically the case when the network is first set up. At this time, a large number of electronic price tags need to be added into the network, and the time zone of the electronic price tags is acquired from the gateway. At this time, the gateway is in the SCANNING state, and when it listens to the broadcast information of the electronic price tag and the bit in the broadcast information indicates that the electronic price tag is not currently in any network, the gateway performs networking through the above S1, S2 and S3.
2. When the gateway is in single device joining mode
When the gateway is in the single device join mode, only the designated electronic price tag is allowed to join the network. The manager firstly inputs the device information of the electronic price tags needing to be added into the network, and the gateway automatically generates a new device list according to the device information of the electronic price tags. When the gateway receives the broadcast information of the request time zone distribution sent by the electronic price tag in the new equipment list, the information is fed back to the parameter information of the electronic price tag time zone at the interval time defined by the Bluetooth specification so as to complete the setting of the time zone.
Fourth, result verification
In the implementation process, the data format lengths of the broadcast information (ADV _ IND) and the time zone parameter information (TIMEZONE _ IND) for requesting time zone allocation can be fixed, so that in the batch joining mode, the communication process of the electronic price tag and the gateway can be modeled by a Pure ALOHA (or unslotted ALOHA) network. The table is the packet length defined in our system, and fig. 4 is the load and throughput rate functional correspondence for Pure Aloha networks.
Watch 1
See table one and fig. 4, where S ═ G × e-2GFor load G, we can calculate that G ═ 1000, assuming a network of 1000 BLE Node nodes, the frequency of packet transmission by each Node is 15s, each packet lasts for ADV _ IND, i.e. 176us, then wait 150us, and finally BLE Gateway transmits TIMEZONE _ IND for 176 us. Then, during this period (176+150+176 ═ 502us) s, on average, 1000 ═ 502/(15 × -1000000) ═ 0.033 packets will be sent. Since G is much smaller than the ideal network load (G ═ 0.5), we have good reason to believe 1000 nodes areThe time zone can be quickly allocated to the network, namely, the network collision probability can be quickly converged to 0. Only the average networking time is calculated here, and does not represent the single networking time, and the actual networking time may be smaller because the probability of collision is smaller and smaller as the number of nodes successfully networked is larger and larger.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (3)
1. The networking method for the electronic price tag system is characterized by comprising the following steps of:
and a data dynamic sending step: the electronic price tag randomly selects time to wake up in a preset time interval to enter an awakening mode, and sends broadcast information requesting to allocate a time zone to a gateway;
a verification step: when the gateway listens to the broadcast information, judging whether the electronic price tag sending the broadcast information is added into the network according to the broadcast information;
time zone configuration step: when judging that a certain electronic price tag is not added to the network, configuring a time zone for the electronic price tag and sending time zone parameter information to the electronic price tag;
and a wake-up time selection step: when the time zone parameter information is not acquired within the preset time, switching the awakening mode into the sleeping mode, and selecting the time for awakening and sending the broadcast information requesting to allocate the time zone within the next time interval;
time calculation step: when time zone parameter information is acquired within preset time, stopping sending broadcast information requesting for distributing time zones, switching an awakening mode into a sleeping mode, and calculating the time for sending data updating request information when the data updating request information wakes up next time according to the time zone parameter information;
the time zones are divided based on the time span of a preset time interval and the number of the electronic price tags;
the data dynamic sending step: the awakening time of the electronic price tag in a preset time interval is taken as starting time, and broadcasting information requesting for distributing time zones is sequentially sent to the gateway on different frequency bands in a preset time interval by starting the starting time;
the awakening time selection step: when time zone parameter information is not acquired in a certain time interval, switching the awakening mode into a sleeping mode, and selecting the awakening time in the next time interval;
the gateway comprises a batch joining mode and a single equipment joining mode, and further comprises:
a mode switching step: the manager switches the batch joining mode and the single equipment joining mode of the gateway;
the verification step comprises: when the gateway is in a batch joining mode, if the broadcast information is intercepted, judging whether the electronic price tag for sending the broadcast information is joined into the network according to the bit of the broadcast information; further comprising:
a device list generation step: when the gateway is in a single-device adding mode, a manager inputs device information of an electronic price tag needing to be added into the network and generates a new device list;
the time zone configuration step: when the gateway is in the single-device joining mode, if the broadcast information of the electronic price tag in the new device list is received, configuring a time zone for the electronic price tag and sending time zone parameter information to the electronic price tag.
2. The networking method for an electronic price tag system according to claim 1, wherein the electronic price tag is connected to the gateway via bluetooth, and the electronic price tag selects a frequency band according to a bluetooth BLE protocol to transmit broadcast information requesting allocation of a time zone to the gateway.
3. The networking method for an electronic price tag system of claim 1, wherein the device list generating step: and generating a device list by the electronic price tags which are added into the network, wherein the device list comprises the device information of each electronic price tag.
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| CN110166967B (en) * | 2019-05-30 | 2022-04-15 | 深圳云里物里科技股份有限公司 | Data communication method and system of electronic shelf label and related components |
| CN110446273B (en) * | 2019-07-30 | 2021-08-13 | 深圳市天工测控技术有限公司 | Networking method and device based on electronic price tags |
| CN111935799B (en) * | 2020-09-28 | 2021-03-16 | 汉朔科技股份有限公司 | Base station selection method and system for electronic price tags |
| CN112272395B (en) * | 2020-11-25 | 2022-08-19 | 努比亚技术有限公司 | Electronic price sign-on network backoff method, equipment and computer readable storage medium |
| CN113099513B (en) * | 2021-03-29 | 2023-12-08 | 深圳市中兴移动软件有限公司 | Base station selection method, electronic terminal and computer readable storage medium |
| CN114979974A (en) * | 2022-04-13 | 2022-08-30 | 深圳市智岩科技有限公司 | Wireless control method, device and equipment |
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