CN114531704A - Communication method and system between price tags of base station - Google Patents
Communication method and system between price tags of base station Download PDFInfo
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Abstract
The invention relates to the technical field of communication, in particular to a communication method and a communication system between price tags of a base station. The communication method between the price tags of the base station comprises the following steps: the base station receives data issued by the server and analyzes the data; the base station sends the analyzed data packet to each price tag according to a preset rule, wherein the preset rule comprises the following steps: a header packet alignment mode and a transmission time interval between two preset packets; completing time correction of all price tags in a real-time correction mode through communication between the price tags and the base station; and each price tag calculates the corresponding response window time according to a preset algorithm, and each price tag responds to a signal within the corresponding response time. By the method, the stability and the success rate of communication between the base station and the price tag can be greatly improved.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a communication method and a communication system between price tags of a base station.
Background
In the market, electronic price tags are used in more and more occasions. Currently, when the price tag receives a data packet from a base station, the price tag end has no way of accurately timing due to the fact that the RTC module is not arranged at the price tag end.
When the price tag is used for processing data and needs to respond, the price tag is sorted into 0-N according to protocol content in a data packet by adopting rough sorting, and then a fixed value is multiplied by delay, when the data packet is to be sent, the price tag can detect the value of a surrounding radio signal, when the value is lower than the nominal value, the answer packet is sent, if the value is higher than the nominal value, the answer is interfered when the radio transmission exists in the current environment, and the answer data packet is sent after a small time delay, so that the mutual interference of answer signals between the price tag and the price tag can be caused with a high probability, and the success rate of price tag communication is low.
Disclosure of Invention
Therefore, a communication method between price tags of a base station is needed to be provided for solving the problem that the price tags adopt rough sequencing delay response to cause the mutual interference of price tags and price tag response signals with higher probability in the existing communication between the price tags of the base station, and the specific technical scheme is as follows:
a communication method between price tags of a base station comprises the following steps:
the base station receives data issued by the server and analyzes the data;
the base station sends the analyzed data packet to each price tag according to a preset rule, wherein the preset rule comprises the following steps: a header packet alignment mode and a transmission time interval between two preset packets;
the timing of all price tags is finished in a communication real-time timing mode between the price tags and the base station;
each price tag calculates the corresponding response time according to a preset algorithm;
each price tag responds to the signal within a respective response time.
Further, the "the base station sends the analyzed data packet to each price tag according to the preset rule", further comprising the steps of:
and (3) adopting a head packet alignment mode, and sending the data packets to each price tag by the base station according to a preset sending time interval between two packets until all the data packets are sent.
Further, the "completing the timing of all price tags in the real-time timing mode through the communication between the price tags and the base station" further comprises the following steps:
according to the time sequence well agreed by the price tag and the base station, through the head packet pair, when the price tag receives the 0 th packet data, the timing reference time is calculated according to the ID sequence of the price tag, and when the base station finishes sending all the 0 th packet data of the price tag, the timing of all the price tags is finished.
Further, the step of calculating the response time corresponding to each price tag according to a preset algorithm further comprises the following steps:
calculating response reference time according to the price tag response period and the current real-time, and if the response reference time is within the response window time of the price tag, sending a response data packet within the response window time;
if the response reference time is larger than the response window time of the price tag, a response data packet is sent in the next sending period;
and if the response reference time is less than the response window time of the price tag, calculating how long the response data packet is transmitted by subtracting the reference time from the response window time.
In order to solve the technical problem, a communication system between price tags of base stations is also provided, and the specific technical scheme is as follows:
a communication system between base station price tags, comprising: the base station is in communication connection with the price tag;
the base station is configured to: receiving data issued by a server, and analyzing the data;
the base station is further configured to: sending the analyzed data packet to each price tag according to a preset rule, wherein the preset rule comprises the following steps: a header packet alignment mode and a transmission time interval between two preset packets;
the price tag is used for: completing the timing of all price tags in a real-time timing mode through communication with a base station; calculating the corresponding response time according to a preset algorithm; the signals are answered within respective corresponding answer window times.
Further, the base station is further configured to: and (3) adopting a head packet alignment mode, and sending the data packets to each price tag by the base station according to a preset sending time interval between two packets until all the data packets are sent.
Further, the price tag is further configured to: according to the time sequence well agreed by the price tag and the base station, through the head packet pair, when the price tag receives the 0 th packet data, the timing reference time is calculated according to the ID sequence of the price tag, and when the base station finishes sending all the 0 th packet data of the price tag, the timing of all the price tags is finished.
Further, the price tag is further configured to: calculating response reference time according to the price tag response period and the current real-time, and if the response reference time is within the response window time of the price tag, sending a response data packet within the response window time;
if the response reference time is larger than the response window time of the price tag, sending a response data packet in the next sending period;
and if the response reference time is less than the response window time of the price tag, calculating how long the response data packet is transmitted by subtracting the reference time from the response window time.
The invention has the beneficial effects that: receiving data issued by a server through a base station, and analyzing the data; the base station sends the analyzed data packet to each price tag according to a preset rule, wherein the preset rule comprises the following steps: a header packet alignment mode and a transmission time interval between two preset packets; completing time correction of all price tags in a real-time correction mode through communication between the price tags and the base station; each price tag calculates the corresponding response time according to a preset algorithm; each price tag responds to the signal within a respective response time. In the technical scheme, the time calibration of all price tags is completed in a real-time calibration mode through communication between the price tags and the base station, the stability and the reliability of data issued by the base station can be effectively improved, the time interval does not depend on a server but is directly controlled by the base station, the flexibility is brought to software and hardware iteration of the price tags in the later period, only the protocol between the base station and the price tags needs to be modified, and the server end does not need to be modified. And the time calibration of all price tags is completed, so that the unrelated price tags have a common time reference, and the response window time of each price tag is calculated by means of a preset algorithm, so that the stability and the success rate of the communication between the base station and the price tags can be greatly improved.
Drawings
FIG. 1 is a flow chart illustrating a method for communication between price tags of a base station in accordance with an embodiment;
fig. 2 is a timing diagram of a base station packet transmission according to the embodiment;
FIG. 3 is a timing diagram illustrating a price-pairing and response algorithm according to an embodiment;
fig. 4 is a schematic diagram illustrating a module connection of a communication system between price tags of base stations according to an embodiment.
Description of reference numerals:
400. a communication system between price tags of base stations,
401. a Base Station (BS) is provided,
402. and (6) price tags.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1 to 3, in the present embodiment, a method for communication between base station price tags is applicable to a communication system between base station price tags, the communication system between base station price tags includes: the base station is in communication connection with the price tag.
In this embodiment, a group of 18 price tags is taken as an example to describe the communication between the base station and the price tags of a group, and one group has more price tags or more groups.
Similarly, in the present embodiment, the price tag response period is also set in advance. The price tag response period refers to the time from the first response to the end of the last response for a group of (18) price tags. The following description takes a set of 18 price tags as an example:
step S101: and the base station receives the data issued by the server and analyzes the data. The method specifically comprises the following steps: after the interface receives the issued data, the server correspondingly generates the content of a corresponding base station data packet, the data is pushed to the base station at one time, and the base station analyzes the first packet with the corresponding data packet format of price tag 0, the first packet with price tag 1, the first packet with price tag 2, the second packet with price tag 0 … … and the seventeenth packet with price tag 17 of second packet … … with price tag 1 according to the protocol.
After the data analysis is finished, executing step S102: the base station sends the analyzed data packet to each price tag according to a preset rule, wherein the preset rule comprises the following steps: header alignment mode and presetting of transmission time interval between two packets. Specifically, referring to fig. 2, a header packet alignment mode is adopted, and the base station sends data packets to each price tag according to a preset sending time interval between two packets until all data packets are sent. In this embodiment, the base station calls the radio module to transmit data at exactly 10ms intervals, and adopts the packet header alignment mode, for example, 0ms transmits the first packet of price tag 0, 10ms transmits the first packet of price tag 1, and 20ms transmits the first packet of price tag 2 until all data packets are transmitted. In other embodiments, the interval time may be arbitrarily set according to an actual application scenario, and is not limited.
Step S103: and completing the timing of all price tags in a real-time timing mode through the communication between the price tags and the base station. The method specifically comprises the following steps: the price tag end is limited by that hardware does not have an RTC module and the requirement on time precision is higher, so that a real-time comparison mode of each communication is adopted, according to a time sequence well agreed by the price tag and the base station, through head packet time comparison, when the price tag receives the 0 th packet data, a time comparison reference time is calculated according to the ID sequence of the price tag, and after the base station sends all the 0 th packet data of the price tag, the time comparison of all the price tags is completed. The following is specifically described with reference to fig. 3: the time interval of the price tag receiving the 0 th packet of data is exactly 10ms controlled by the base station, the protocol can analyze that the current price tag is in the position of the group, so after the price tag receives the 0 th packet of data, a timing reference time can be calculated according to the self ID sequence, for example, the current time is 12:00:00 whole base station sends the first packet of data, after the 0 th price tag is received, the current time of the 0 th price tag is 12:00:00, according to the formula 0 x 10ms, the 1 st price tag is accumulated to the timing reference time according to the formula 1 x 10ms, the current time of the 1 st price tag is 12:00:00+10ms, because the 10ms has passed when the 0 th price tag receives the data packet at the 1 st price tag, the time of the 0 th price tag is 12:00:00+10ms, the time references of the two price tags are consistent after time synchronization, and according to the same principle, the 17 x 10ms after the price tag receives the data packet is 12:00:00+170ms, after the base station transmits all the 0 th packet data of a group of 18 price tags, the price tag end completes the timing operation.
Step S104: and each price tag calculates the corresponding response time according to a preset algorithm. The method specifically comprises the following steps: after the price tag finishes processing the data packet, an operation success response needs to be sent to the base station, because the time when the other party responds is not known between the price tags, in order to prevent radio interference caused by collision between price tag response signals, a group of price tags need to respond in sequence strictly, a period of data processing time is about 200ms after the price tag finishes receiving the data packet, and then the price tag can process the data packet according to an algorithm: calculating response reference time according to the price tag response period and the current real-time, and if the response reference time is within the response window time of the price tag, sending a response data packet within the response window time;
if the response reference time is larger than the response window time of the price tag, a response data packet is sent in the next sending period;
and if the response reference time is less than the response window time of the price tag, calculating how long the response data packet is transmitted by subtracting the reference time from the response window time.
The response window time refers to that each price tag sends a response signal in a specific time period, and radio interference generated by a plurality of price tags responding to the signals simultaneously is avoided.
The following examples illustrate three cases respectively:
assuming that a group of price tags are unified at 12:00:00 standard after the time is finished, then the first price tag finishes processing the data time to come to 12:00:00:200, 200 milliseconds obtained after the 200 milliseconds leave the response period are response reference time, and the first price tag is 0-100 according to the calculation of the response window, so that the time of 200 milliseconds exceeds the response window of the first price tag, and the time of the next response window needs to be waited to come to be 0-100 milliseconds of the next sending period;
when the third price tag responds, its time is 12:00: 200, the response reference time of which is also 200ms, but the response window time of the third price tag is 200ms and 300 ms, so that the third price tag can send the response signal without waiting for the next response period to be directly in the period;
when the fourth price tag responds, its time is 12:00: 200, its response reference time is also 200ms, but the response window time of the third price is 300-.
The specific codes are as follows:
the response time of each price tag is calculated, the price tags respond to the signals within the response time of the price tags in sequence, and the windows are exclusive for the price tags, so that the interference between radio signals is avoided from the source, and the stability of system operation and the success rate of communication are greatly improved.
Step S105: each price tag responds to the signal within a respective response time.
Receiving data issued by a server through a base station, and analyzing the data; the base station sends the analyzed data packet to each price tag according to a preset rule, wherein the preset rule comprises the following steps: a header packet alignment mode and a transmission time interval between two preset packets; the timing of all price tags is finished in a communication real-time timing mode between the price tags and the base station; each price tag calculates the corresponding response time according to a preset algorithm; each price tag responds to the signal within a respective response time. In the technical scheme, the time calibration of all price tags is completed in a real-time calibration mode through communication between the price tags and the base station, the stability and the reliability of data issued by the base station can be effectively improved, the time interval does not depend on a server but is directly controlled by the base station, the flexibility is brought to software and hardware iteration of the price tags in the later period, only the protocol between the base station and the price tags needs to be modified, and the server end does not need to be modified. And the time calibration of all price tags is completed, so that the unrelated price tags have a common time reference, and the response window time of each price tag is calculated by means of a preset algorithm, so that the stability and the success rate of the communication between the base station and the price tags can be greatly improved.
Referring to fig. 2 to 4, in the present embodiment, an embodiment of a communication system 400 between base station price tags is as follows:
a communication system 400 between base station price tags, comprising: a base station 401 and a price tag 402, wherein the base station 401 is in communication connection with the price tag 402; the base station 401 is configured to: receiving data issued by a server, and analyzing the data; the base station 401 is further configured to: the base station 401 sends the analyzed data packet to each price tag 402 according to a preset rule, where the preset rule includes: a header packet alignment mode and a transmission time interval between two preset packets; the price tag 402 is used to: the timing of all price tags 402 is completed in a real-time timing mode through communication with the base station 401; and calculating the corresponding response time according to a preset algorithm, and responding to the signal within the corresponding response time. The method specifically comprises the following steps: after receiving the issued data, the server generates corresponding data packet contents of the base station 401 correspondingly, and pushes the data to the base station 401 at one time, and the base station 401 resolves the first packet with the corresponding data packet format of price tag 0402, the first packet with price tag 1402, the first packet with price tag 2402, the second packet with price tag 0402 of … …, and the seventeenth packet with price tag 17402 of second packet … … of price tag 1402 according to the protocol.
Further, the base station 401 is further configured to: and sending data packets to each price tag 402 according to a preset sending time interval between two packets by adopting a header packet alignment mode until all data packets are sent. Specifically, referring to fig. 2, in the present embodiment, the base station 401 calls the radio module to transmit data at an interval of exactly 10ms, and adopts the packet header alignment mode, for example, the first packet of the price tag 0402 is transmitted at 0ms, the first packet of the price tag 1402 is transmitted at 10ms, and the first packet of the price tag 2402 is transmitted at 20ms until all data packets are transmitted. In other embodiments, the interval time may be arbitrarily set according to an actual application scenario, and is not limited.
Further, the price tag 402 is further configured to: according to the well-agreed time sequence of the price tag 402 and the base station 401, through the head packet pair, when the price tag 402 receives the 0 th packet data, a timing reference time is calculated according to the ID sequence of the price tag 402, and when the base station 401 finishes sending all the 0 th packet data of the price tag 402, the timing of all the price tags 402 is finished. The following is specifically described with reference to fig. 3: the time interval of the price tag 402 receiving the 0 th packet of data is exactly 10ms controlled by the base station 401, the protocol can analyze that the current price tag 402 is in the position of the group, so that after the price tag 402 receives the 0 th packet of data, a timing reference time can be calculated according to the self ID sequence, for example, the whole base station 401 at the current time of 12:00:00 sends the first packet of data, after the 0 th price tag 402 receives the data, the current time of the 0 th price tag 402 is 12:00:00, the 1 st price tag 402 adds up to the timing reference time according to the formula 1 x 10ms after the 1 st price tag 402 receives the data, the current time of the 1 st price tag 402 is 12:00:00+10ms, because the 0 th price tag 402 has already passed 10ms when the 1 st price tag 402 receives the data packet, the time of the 0 th price tag 402 is also 12:00:00+10ms, and the time references of the two timing tags 402 are consistent, similarly, after the data packet received by the price tag 402 of 17 th is 12:00:00+170ms according to the formula 17 x 10ms, the base station 401 finishes sending all the 0 th data packets of a group of 18 price tags 402, and the price tag 402 end finishes the timing operation.
After the price tag 402 finishes processing the data packet, an operation success response needs to be sent to the base station 401, since it is not known when the other party responds between the price tags 402, in order to prevent radio interference caused by collision between price tag 402 response signals, a group of price tags 402 need to respond in sequence strictly, after the price tag 402 finishes receiving the data packet, a period of data processing time is about 200ms, and then the price tag 402 will process the data packet according to an algorithm: calculating response reference time according to the response period of the price tag 402 and the current real-time, and if the response reference time is within the response window time of the price tag 402, sending a response data packet within the response window time;
if the response reference time is greater than the response window time of the price tag 402, sending a response data packet in the next sending period;
if the response reference time is less than the response window time of the price tag 402, the response window time minus the reference time is used to calculate how long the response data packet is delayed to be transmitted.
The above-mentioned reply window time means that each price tag 402 transmits a reply signal within a specific time period, so as to avoid radio interference caused by multiple price tags 402 simultaneously replying to the signal.
The following examples illustrate three cases respectively:
assuming that a group of price tags 402 are unified at 12:00:00 standard after the time is finished, then the data processing time of the first price tag 402 comes to 12:00:00:200, 200 milliseconds obtained after the 200 milliseconds leave the response period are response reference time, and the response window of the first price tag 402 is 0-100 according to calculation, so that the time of 200 milliseconds exceeds the response window of the first price tag 402, and the time of the next response window needs to be waited to come to be 0-100 milliseconds of the next transmission period;
when the third price tag 402 responds, its time is 12:00: 200, its response reference time is also 200ms, but the response window time of the third price tag 402 is 200ms and 300 ms, so the third price tag 402 can send the response signal without waiting for the next response period directly in this period;
when the fourth price tag 402 responds, its time is 12:00: 200, its response reference time is also 200ms, but the response window time of the third price tag 402 is 300-.
The specific codes are as follows:
the response time of each price tag 402 is calculated, the price tags 402 respond to signals within the response time of the price tags 402 in sequence, and the windows are exclusive to the price tags 402, so that the interference between radio signals is avoided from the source, and the stability of system operation and the success rate of communication are greatly improved.
Receiving data issued by a server through a base station 401, and analyzing the data; the base station 401 sends the analyzed data packet to each price tag 402 according to a preset rule, where the preset rule includes: a header packet alignment mode and a transmission time interval between two preset packets; the timing of all price tags 402 is completed in a communication real-time timing mode between the price tags 402 and the base station 401; each price tag 402 calculates the corresponding response time according to a preset algorithm; each price tag 402 responds to the signal within a respective response time. In the technical scheme, the timing of all price tags 402 is completed in a real-time timing mode through communication between the price tags 402 and the base station 401, the stability and reliability of data issued by the base station 401 can be effectively improved, the time interval is not dependent on a server but is directly controlled by the base station 401, the flexibility is brought to software and hardware iteration of the price tags 402 at the later stage, only the protocol between the base station 401 and the price tags 402 needs to be modified, and the server end does not need to be modified. When all price tags 402 are calibrated, a common time reference is formed between the unrelated price tags 402, and the response window time of each price tag 402 is calculated by means of a preset algorithm, so that the stability and the success rate of communication between the base station 401 and the price tags 402 can be greatly improved.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.
Claims (8)
1. A communication method between price tags of a base station is characterized by comprising the following steps:
the base station receives data issued by the server and analyzes the data;
the base station sends the analyzed data packet to each price tag according to a preset rule, wherein the preset rule comprises the following steps: a header packet alignment mode and a transmission time interval between two preset packets;
completing time correction of all price tags in a real-time correction mode through communication between the price tags and the base station;
each price tag calculates the corresponding response time according to a preset algorithm;
each price tag responds to the signal within a respective response time.
2. The method as claimed in claim 1, wherein the step of the base station sending the parsed data packets to each price tag according to a preset rule further comprises the steps of:
and (3) adopting a head packet alignment mode, and sending the data packets to each price tag by the base station according to a preset sending time interval between two packets until all the data packets are sent.
3. The method as claimed in claim 1, wherein the step of performing the time calibration of all price tags in the real-time calibration mode via the communication between the price tags and the base stations further comprises the steps of:
according to the well-agreed time sequence of the price tag and the base station, through head packet pair, when the price tag receives the 0 th packet data, the timing reference time is calculated according to the ID sequence of the price tag, and when the base station finishes sending all the 0 th packet data of the price tag, the timing of all the price tags is finished.
4. The method as claimed in claim 1, wherein the step of calculating the response time corresponding to each price tag according to a preset algorithm further comprises the steps of:
calculating response reference time according to the price tag response period and the current real-time, and if the response reference time is within the response window time of the price tag, sending a response data packet within the response window time;
if the response reference time is larger than the response window time of the price tag, sending a response data packet in the next sending period;
and if the response reference time is less than the response window time of the price tag, calculating how long the response data packet is transmitted by subtracting the reference time from the response window time.
5. A communication system between price tags of base stations, comprising: the base station is in communication connection with the price tag;
the base station is configured to: receiving data issued by a server, and analyzing the data;
the base station is further configured to: sending the analyzed data packet to each price tag according to a preset rule, wherein the preset rule comprises the following steps: a header packet alignment mode and a transmission time interval between two preset packets;
the price tag is used for: completing the timing of all price tags in a real-time timing mode through communication with a base station; calculating the corresponding response time according to a preset algorithm; the signals are answered within respective corresponding answer window times.
6. The system of claim 5, wherein the base station is further configured to: and adopting a head packet alignment mode, and sending the data packets to each price tag by the base station according to a preset sending time interval between two packets until all the data packets are sent.
7. The system of claim 5, wherein the price tag is further configured to: according to the time sequence well agreed by the price tag and the base station, through the head packet pair, when the price tag receives the 0 th packet data, the timing reference time is calculated according to the ID sequence of the price tag, and when the base station finishes sending all the 0 th packet data of the price tag, the timing of all the price tags is finished.
8. The system of claim 5, wherein the price tag is further configured to: calculating response reference time according to the price tag response period and the current real-time, and if the response reference time is within the response window time of the price tag, sending a response data packet within the response window time;
if the response reference time is larger than the response window time of the price tag, sending a response data packet in the next sending period;
and if the response reference time is less than the response window time of the price tag, calculating how long the response data packet is transmitted by subtracting the reference time from the response window time.
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Citations (7)
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| WO2020220178A1 (en) * | 2019-04-29 | 2020-11-05 | 浙江汉朔电子科技有限公司 | Method and system for detecting position change of electronic price tag, controller and electronic price tag |
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| JP2006238381A (en) * | 2005-02-28 | 2006-09-07 | Nippon Telegr & Teleph Corp <Ntt> | System and identification method for wireless tag, and identification program thereof |
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| CN114531704B (en) | 2024-03-19 |
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