Periodic dual-frequency alternating data uplink and downlink processing method and system

Abstract

The invention discloses a periodic double-frequency alternating data uplink and downlink processing method and system, and the method comprises the steps: constructing a period counter for the data interaction of a street lamp terminal, obtaining the period duration of the data interaction of the street lamp terminal, and enabling the period counter to be used for judging the number of periods of a current time point; each period is fragmented according to the period duration, uplink period fragments and downlink period fragments are obtained, and each period fragment carries out frequency division interaction between the gateway and the corresponding street lamp terminal according to the number of periods; the street lamp terminal polls all uplink frequency points according to the fragment type of the current period, gateway working uplink frequency points meeting conditions are screened and then stored, and the gateway obtains the corresponding uplink frequency points and automatically finds out the corresponding downlink frequency points according to the uplink frequency points; and the gateway synchronizes the period duration, judges the current period number of the gateway according to a period counter, and performs corresponding street lamp terminal data downlink according to the period number and the corresponding downlink frequency point.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of street lamp data processing transmission, in particular to a periodic double-frequency alternating data uplink and downlink processing method and system. BACKGROUND

[0002] At present, street lamps have been configured with communication modules and gateways in large scale, wherein the communication module is connected with the related sensors and processing modules of the street lamp, and is used for uploading the state information such as brightness, failure and energy consumption of the street lamp to the gateway, wherein the gateway can download the information including identity authentication and switch control to each communication module of the street lamp. The traditional street lamp communication module often uses a fixed frequency point for uplink and downlink, and the uplink and downlink time is relatively concentrated, so that the traditional street lamp is prone to data congestion in the data uplink and downlink process, and the common frequency point and concentrated data transmission of the street lamp data uplink and downlink can easily cause co-frequency interference, so that the packet loss rate of the street lamp data uplink and downlink is obviously increased, which is not conducive to the monitoring of the street lamp data. SUMMARY

[0003] One of the purposes of the present application is to provide a periodic double-frequency alternating data uplink and downlink processing method and system, which constructs alternating data intervals of even periods and odd periods, and uses corresponding frequency points in the corresponding even periods and odd periods, wherein the street lamp terminal polls the uplink frequency point in the even period, judges the available uplink frequency point, and the gateway presets the downlink frequency point in the odd period, wherein the uplink frequency point is used for the uplink transmission of the street lamp terminal data in the even period, and the downlink frequency point is used for the data downlink transmission of the gateway in the odd period, so that the time isolation mode of even and odd periods effectively avoids the data congestion of the street lamp data uplink and downlink, and reduces the packet loss rate of the street lamp data.

[0004] One of the purposes of the present application is to provide a periodic double-frequency alternating data uplink and downlink processing method and system, wherein the street lamp terminal polls the uplink frequency point in the even period, and uploads the uplink frequency point data to the corresponding gateway in the even period, the gateway saves the uplink frequency point data, and the gateway isolates the downlink frequency point according to the uplink frequency point data, wherein the gateway isolates the downlink frequency point of the gateway according to the effective uplink frequency point polled by the street lamp terminal according to the gateway working frequency point group, so that there is a large frequency point interval between the uplink frequency point and the downlink frequency point, thereby effectively avoiding the co-frequency interference of the uplink frequency point and the downlink frequency point in the data transmission, and improving the effectiveness of the street lamp data uplink and downlink.

[0005] One of the purposes of the present application is to provide a method and system for processing data of periodic double-frequency alternation, which acquires the signal strength data of each uplink frequency point polled by each street lamp terminal in an even period, filters out the gateway working frequency point group meeting the signal strength requirement according to the signal strength data, filters out different gateway working frequency point groups with downlink frequency points having a certain frequency interval, allocates spatial areas to the downlink frequency points, and uses the downlink frequency points in an odd period, so that the data transmission of the uplink and downlink frequency points has the effects of frequency isolation and time isolation, greatly reducing the influence of data congestion and co-channel interference on the uplink and downlink data transmission of the street lamp.

[0006] In order to achieve at least one of the above-mentioned purposes, the present application further provides a method for processing data of periodic double-frequency alternation, which comprises: constructing a period counter of street lamp terminal data interaction and acquiring the period length of the street lamp terminal data interaction, wherein the period counter is used to determine the period number of the current time point; According to the period length, the period counter is divided into uplink period fragments and downlink period fragments, wherein each period fragment is divided into gateway and corresponding street lamp terminal frequency interaction according to the period number; The street lamp terminal polls all uplink frequency points according to the current period fragment type, saves the gateway working uplink frequency points meeting the conditions after screening, and the gateway acquires the corresponding uplink frequency point and automatically finds the corresponding downlink frequency point according to the uplink frequency point; The gateway synchronizes the period length, determines the period number of the gateway according to the period counter, and performs data downlink of the corresponding street lamp terminal according to the corresponding downlink frequency point according to the period number.

[0007] According to one of the preferred embodiments of the present application, the period counter comprises a synchronous clock, which is used to determine the start time of the current period and the end time of the current period according to the preset period length, and adds 1 to the corresponding period number when the corresponding period ends; wherein the period number comprises an even period and an odd period, the corresponding even period and odd period are alternately generated according to the period counter and the corresponding period length, respectively used to acquire the corresponding uplink frequency point and downlink frequency point, and the uplink and downlink of the street lamp data are performed in the corresponding period.

[0008] According to another preferred embodiment of the present application, the gateway constructs a dynamic uplink frequency point polling table, and the gateway performs the uplink frequency point polling in an even period uplink period fragment and acquires the gateway working frequency point in an odd period downlink period fragment. The gateway determines whether the polled uplink frequency point belongs to the gateway working frequency point according to the response information of each polled uplink frequency point. When the gateway working frequency point corresponding to the uplink frequency point is acquired in the odd period downlink period fragment, the corresponding uplink frequency point and downlink frequency point are saved as a gateway working frequency point group in the street lamp terminal, and data uplink and downlink are performed according to the gateway working frequency point group.

[0009] According to another preferred embodiment of the present application, the gateway determines the period number in which the gateway is located according to a synchronization clock and a period counter. After the gateway acquires all uplink frequency points in the uplink frequency point polling table and returns them to the street lamp terminal, the gateway acquires a plurality of gateway working frequency point groups satisfying a condition, selects one of the gateway working frequency point groups as a target working frequency point group, and performs street lamp interactive data transmission according to the target working frequency point group when the gateway is in an odd period according to the synchronization clock and the period counter. The gateway performs period counting when the current period ends. The downlink frequency point of the target working frequency point group satisfies that the left and right frequency intervals of the downlink frequency point and the corresponding uplink frequency point or the downlink frequency point of another gateway working frequency point group are greater than a preset frequency interval threshold.

[0010] According to another preferred embodiment of the present application, the street lamp terminal sends a network access request to the gateway through a random uplink frequency point in an even period. After the gateway acquires the network access request of the corresponding street lamp terminal, the gateway acquires an uplink frequency point with the strongest RISS signal in the current uplink frequency point polling table that satisfies the gateway working frequency point group, and issues the uplink frequency point with the strongest RISS signal as the uplink network access frequency point bound to the street lamp terminal in the corresponding downlink frequency point in an odd period. The gateway selects the downlink frequency point of the gateway working frequency point group corresponding to the uplink frequency point with the strongest RISS signal to perform data downlink of the corresponding street lamp terminal in the odd period.

[0011] According to another preferred embodiment of the present application, the gateway includes gateways in different regions, and the working frequency point groups of the gateways in different regions are different. Different downlink frequency points are sent to the gateways in different regions according to a preset frequency interval rule, for data downlink of the street lamp terminals connected to the gateways in different regions, and the uplink frequency points of the street lamp terminals connected to the corresponding gateways are allocated at the same time. The uplink frequency point allocation rule includes that the uplink same frequency terminal connected to the gateway in different regions is greater than the uplink same frequency multiplexing distance, for reducing the same frequency interference of the uplink and downlink frequency points of the gateways in different regions.

[0012] According to another preferred embodiment of the present application, when the gateway does not receive an acknowledgement ACK from the corresponding streetlight terminal at the first uplink frequency in the current corresponding even period, the gateway sends a retransmission response to the corresponding streetlight terminal in the next odd period adjacent to the current corresponding even period; the corresponding streetlight terminal retransmits corresponding data at a new second uplink frequency in the next even period adjacent to the current odd period according to the retransmission response until the gateway receives the acknowledgement ACK from the corresponding streetlight terminal in the corresponding even period, and the data in different periods is synchronized.

[0013] According to another preferred embodiment of the present application, when the streetlight terminal does not receive an acknowledgement ACK from the corresponding gateway at the first downlink frequency in the current corresponding odd period, the streetlight terminal sends a retransmission response to the corresponding gateway in the next even period adjacent to the current corresponding odd period; the corresponding gateway selectively retransmits corresponding data at a second downlink frequency in the next odd period adjacent to the current even period according to the retransmission response until the streetlight terminal receives the acknowledgement ACK from the corresponding gateway in the corresponding odd period, and the data in different periods is synchronized.

[0014] To achieve at least one of the above-mentioned purposes, the present application further provides a system for processing data uplink and downlink in a periodic double-frequency alternation mode, which implements the above-mentioned method for processing data uplink and downlink in a periodic double-frequency alternation mode.

[0015] The present application further provides a computer readable storage medium storing a computer program, which is executed by a processor to implement the above-mentioned method for processing data uplink and downlink in a periodic double-frequency alternation mode. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A flowchart of a method for processing data uplink and downlink in a periodic double-frequency alternation mode is shown. DETAILED DESCRIPTION

[0017] The following description is provided to enable any person skilled in the art to practice the present application. The preferred embodiments described below are only examples of the present application, and other obvious modifications can be made by those skilled in the art. The essential principles of the present application defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions without departing from the spirit and scope of the present application.

[0018] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0019] In combination with Figure 1 The application provides a periodic double-frequency alternating data uplink and downlink processing method and system, the method comprising the following steps: S01, constructing a period counter for data interaction of a street lamp terminal, and obtaining a period length of the data interaction of the street lamp terminal, wherein the period counter is used to determine the period number of a current time point; S02, dividing the period length according to the period length and an interaction instruction type, to obtain a period time slot, wherein each period time slot is used to represent a corresponding interaction instruction type or a corresponding street lamp terminal; S03, the street lamp terminal polls an uplink frequency point according to a current period number, and saves the uplink frequency point to a corresponding gateway after screening the uplink frequency point, the gateway obtains a corresponding uplink frequency point, and generates a downlink frequency point according to the uplink frequency point; S04, the gateway synchronizes the period length, determines a period number of the gateway according to the period counter, and performs data downlink of a corresponding street lamp terminal according to the period number and a corresponding downlink frequency point.

[0020] It should be noted that the period counter in the application can be configured in the corresponding gateway and street lamp terminal, wherein the period counter comprises a synchronization clock, which is used to synchronize the period time of the street lamp terminal and the gateway, so that the uplink and downlink processing of the corresponding data between the street lamp terminal and the gateway can be performed under the same period rule, and the stability of the data uplink and downlink is ensured. In the application, the preset period length is used to determine the current period start time and the current period end time, and the corresponding period number is increased by 1 when the corresponding period ends. For example, the period length in the application can be 100 ms (milliseconds), the period start time of the street lamp terminal is recorded by the synchronization clock, for example, the period start time is defined as 0 (s), and the current period end time is 0.100 (s) according to the period length. The period number comprises an even period and an odd period, and the current period number is recorded by the period counter at the beginning of the period, wherein the initial period number is 1, which is an odd period. The period counter calculates the period number again and increases it by 1 when the current initial period ends according to the synchronization clock and the preset period length, at which time the period number is 2, which is defined as an even period. Further, the period counter and the corresponding period length are used to alternately generate corresponding even periods and odd periods, which are used to obtain corresponding uplink frequency points and downlink frequency points, respectively, and the uplink and downlink of the street lamp data are performed in the corresponding period. Therefore, the uplink and downlink data are effectively avoided from being concentrated in the time domain by the double-period alternating form, which reduces the problem of data packet loss caused by data congestion.

[0021] Further, the application constructs a dynamic uplink frequency point polling table in the gateway, after the gateway obtains the uplink frequency point polled by the street lamp terminal in the even period, the RISS signal strength of the corresponding street lamp terminal and the corresponding uplink frequency point is obtained, wherein a receiving antenna is arranged on the corresponding gateway, the antenna captures electromagnetic waves and converts them into analog electrical signals, the receiver amplifies the signals through automatic gain control (AGC), samples the digital signals through ADC (analog-to-digital converter), and the baseband processor calculates the root mean square (RMS) of the signal amplitude and outputs the original RISS signal strength of the corresponding frequency point of the street lamp terminal; the original RISS signal strength of the corresponding frequency point of the street lamp terminal can also be temperature compensated, to obtain more accurate original RISS signal strength of the corresponding frequency point of the street lamp terminal. The uplink frequency point is screened according to the RISS signal strength, wherein a RISS signal strength threshold is set, if the RISS signal of the current uplink frequency point is greater than the corresponding RISS signal strength threshold, the current uplink frequency point data is saved to the polling table of the uplink frequency point, for dynamically updating the uplink frequency point data in the even period. For example, -80dB can be used as the RISS signal strength threshold in the application.

[0022] It is worth mentioning that the gateway in the application determines the period number in which the gateway is located according to the synchronization clock and the period counter; after the gateway obtains all the uplink frequency points in the uplink frequency point polling table, at least one downlink frequency point is generated by using a frequency interval threshold point isolation algorithm, 2-5MHz can be set as the frequency interval threshold in the application, and when the gateway is in the odd period according to the synchronization clock and the period counter, the generated downlink frequency point is used for street lamp interaction data transmission; the gateway performs period counting when the current period ends; wherein the left and right frequency intervals of the downlink frequency point and the corresponding uplink frequency point or downlink frequency point are greater than the preset frequency interval threshold.

[0023] In one of the preferred embodiments of the application, in order to obtain the signal quality of different frequency points and bind high-quality frequency points, the street lamp terminal sends a network access request to the gateway through a random uplink frequency point in the even period, after the gateway obtains the network access request of the corresponding street lamp terminal, the uplink frequency point with the strongest RISS signal in the current uplink frequency point polling table is obtained, and the uplink frequency point with the strongest RISS signal is issued as the uplink network access frequency point bound by the street lamp terminal in the corresponding downlink frequency point in the odd period; wherein the gateway selects the optimal downlink frequency point for data downlink of the corresponding street lamp terminal in the odd period.

[0024] The gateway comprises gateways of different regions, when a corresponding gateway generates a downlink frequency point satisfying the frequency interval threshold, different downlink frequency points are respectively sent to gateways of different regions, for gateways of different regions to perform data downlink of the connected street lamp terminal, and simultaneously allocate uplink frequency points of the connected street lamp terminal of the corresponding gateway, wherein the uplink frequency point allocation rule comprises: the distance between the uplink same frequency terminal connected by the gateway of different regions is greater than the uplink same frequency multiplexing distance, for reducing the same frequency interference of the uplink and downlink frequency points of the gateway of different regions. For example: the gateways of different regions comprise M1, M2 and M3, wherein the corresponding downlink frequency points allocated by the above-mentioned gateways of different regions M1, M2 and M3 can be D1, D2 and D3, wherein D1=476MHz, D2=478MHz, D3=480MHz, the corresponding uplink frequency point groups of the gateways of different regions M1, M2 and M3 can be F1-F5, F6-F10 and F11-F15, wherein the downlink frequency point and the uplink frequency point are pre-set as a gateway working frequency point group.

[0025] When the gateway does not receive the acknowledgement symbol ACK from the corresponding street lamp terminal of the first uplink frequency point in the current corresponding even period, the gateway sends a retransmission response to the corresponding street lamp terminal in the adjacent next odd period 2n+1 of the current corresponding even period 2n, the corresponding street lamp terminal selects a new second uplink frequency point to retransmit the corresponding data in the adjacent next even period of the current odd period according to the retransmission response, until the gateway receives the acknowledgement symbol ACK from the corresponding street lamp terminal in the corresponding even period, and synchronizes the data of different periods. Or when the street lamp terminal does not receive the acknowledgement symbol ACK from the corresponding gateway of the first downlink frequency point in the current corresponding odd period, the street lamp terminal uploads a retransmission response to the corresponding gateway in the adjacent next even period of the current corresponding odd period, the corresponding gateway selectively retransmits the corresponding data in the adjacent next odd period of the current even period according to the retransmission response, until the street lamp terminal receives the acknowledgement symbol ACK from the corresponding gateway in the corresponding odd period, and synchronizes the data of different periods.

[0026] The processes described above with reference to the flowcharts can be implemented as computer software programs in accordance with embodiments of the present disclosure. Embodiments of the present disclosure include a computer program product comprising a computer program carried on a computer readable medium, the computer program comprising program code for performing the methods illustrated by the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication section, and / or installed from a detachable medium. When the computer program is executed by a central processing unit (CPU), the above-described functions are performed in the methods of the present application. It should be noted that the computer readable medium described above in the present application can be a computer readable signal medium or a computer readable storage medium or any combination of the two. The computer readable storage medium may, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination of the above. More specific examples of the computer readable storage medium can include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, the computer readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, device or apparatus. In the present application, the computer readable signal medium can include a data signal carried in a baseband or as a part of a carrier wave, which carries computer readable program code. Such a propagated data signal can take on many forms, including but not limited to, an electromagnetic signal, an optical signal, or any suitable combination thereof. The computer readable signal medium can also be any computer readable medium that can send, propagate or transfer a program for use by or in connection with an instruction execution system, device or apparatus. The program code contained on the computer readable medium can be transmitted by any suitable medium, including but not limited to, wireless, wire, optical cable, RF, or the like, or any suitable combination thereof.

[0027] The computer program product of the present application can be a computer program product comprising a computer-readable medium bearing computer program code embodied therein for use with a computer. The computer program code can be code defining and / or implementing the present application. The computer program code can be organized into one or more computer program components, including but not limited to, program components for implementing the features of the present application. The one or more computer program components can each include the code implementing the features of the present application. The one or more computer program components can each be embodied on the computer-readable medium. The computer-readable medium can be a tangible computer-readable medium. In operation, the computer program code is provided on the computer-readable medium to a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the code can be executed to implement the present application.

[0028] Those skilled in the art will understand that the application described above and illustrated in the accompanying drawings is presented by way of example only and is not limiting as to the present application. The intent is to convey the principles of the application and the practical application and to afford others skilled in the art the best insight into its construction and operation. The application herein exhibited in and by the described embodiments is intended to cover any and all modifications of the application within the scope of the claims, along with their equivalents.

Claims

1. A method for periodically alternating dual-frequency data uplink and downlink processing, characterized in that, The method includes: A cycle counter for data interaction between street light terminals is constructed, and the cycle duration of the data interaction between the street light terminals is obtained, wherein the cycle counter is used to determine the cycle number at the current time point; Each cycle is segmented according to the cycle duration to obtain uplink cycle segments and downlink cycle segments, wherein each cycle segment performs frequency division interaction between the gateway and the corresponding street light terminal according to the number of cycles; The street light terminal polls all uplink frequency points according to the current period segmentation type, filters out the gateway working uplink frequency points that meet the conditions and saves them. The gateway obtains the corresponding uplink frequency point and automatically finds the corresponding downlink frequency point based on the uplink frequency point. The gateway synchronizes the period duration, determines the current period number based on the period counter, and performs downlink data transmission to the corresponding street light terminal according to the corresponding downlink frequency point based on the period number.

2. The periodic dual-frequency alternating data uplink and downlink processing method according to claim 1, characterized in that, The cycle counter includes a synchronous clock, which is used to determine the start time and end time of the current cycle according to a preset cycle duration, and increments the corresponding cycle value by 1 at the end of the corresponding cycle; wherein the number of cycles includes even cycles and odd cycles, and the corresponding even cycles and odd cycles are alternately generated according to the cycle counter and the corresponding cycle duration, which are used to obtain the corresponding uplink frequency and downlink frequency, and to execute the uplink and downlink of the street light data within the corresponding number of cycles.

3. The periodic dual-frequency alternating data uplink and downlink processing method according to claim 2, characterized in that, The gateway constructs a dynamic uplink frequency polling table. The gateway polls the uplink frequency points in the even-numbered uplink period segments and obtains the gateway's working frequency points in the odd-numbered downlink period segments. Based on the response information of each polled uplink frequency point, it determines whether the polled uplink frequency point belongs to the gateway's working frequency point. When the gateway's working frequency point corresponding to the uplink frequency point is obtained in the odd-numbered downlink period segments, the corresponding uplink and downlink frequency points are saved as a gateway working frequency point group in the street light terminal, and data uplink and downlink are performed according to the gateway working frequency point group for different number of data cycles.

4. The periodic dual-frequency alternating data uplink and downlink processing method according to claim 3, characterized in that, The gateway determines the current cycle number based on the synchronization clock and the cycle counter; After obtaining all uplink frequency points in the uplink frequency point polling table and returning them to the street light terminal, the gateway obtains multiple gateway working frequency point groups that meet the conditions, selects one of them as the target working frequency point group, and determines that the current gateway is in an odd-numbered period according to the synchronization clock and the period counter, and performs street light interactive data transmission according to the target working frequency point group; the gateway performs period counting at the end of the current period; The downlink frequency of the target operating frequency group satisfies that the left and right frequency intervals of the corresponding uplink frequency or other gateway operating frequency group are greater than a preset frequency interval threshold.

5. The periodic dual-frequency alternating data uplink and downlink processing method according to claim 3, characterized in that, The street light terminal sends a network access request to the gateway through a random uplink frequency point in even-numbered cycles. After receiving the network access request from the corresponding street light terminal, the gateway obtains the uplink frequency point with the strongest RISS signal that satisfies the gateway's working frequency point group in the current uplink frequency point polling table, and sends the uplink frequency point with the strongest RISS signal as the uplink network access frequency point bound to the street light terminal in the downlink frequency point of the corresponding odd-numbered cycle. The gateway selects the downlink frequency of the gateway's working frequency group corresponding to the strongest uplink frequency of the RISS signal during the odd-numbered period to perform downlink data transmission to the corresponding street light terminal.

6. The periodic dual-frequency alternating data uplink and downlink processing method according to claim 1, characterized in that, The gateway includes gateways in different regions, each with a different operating frequency group. Different downlink frequencies are sent to the gateways in different regions according to a preset frequency interval rule. This is used by the gateways in different regions to transmit downlink data to the street light terminals they are connected to, and simultaneously allocate uplink frequencies to the street light terminals connected to the corresponding gateways. The uplink frequency allocation rule includes: the distance between the uplink terminals connected to the gateways in different regions is greater than the uplink frequency reuse distance, in order to reduce co-channel interference between the uplink and downlink frequencies of the gateways in different regions.

7. The periodic dual-frequency alternating data uplink and downlink processing method according to claim 1, characterized in that, If the gateway does not receive an ACK from the corresponding street light terminal on the first uplink frequency point within the current even-numbered period, the gateway will send a retransmission response to the corresponding street light terminal in the next odd-numbered period adjacent to the current even-numbered period. The corresponding street light terminal selects a new second uplink frequency point to retransmit the corresponding data in the next even-numbered period adjacent to the current odd-numbered period based on the retransmission response, until the gateway receives the ACK symbol from the corresponding street light terminal in the corresponding even-numbered period and synchronizes the data of different periods.

8. The periodic dual-frequency alternating data uplink and downlink processing method according to claim 1, characterized in that, If the street light terminal does not receive an ACK from the corresponding gateway on the first downlink frequency within the current odd-numbered period, the street light terminal uploads a retransmission response to the corresponding gateway in the next even-numbered period adjacent to the current odd-numbered period. The corresponding gateway then selectively retransmits the corresponding data on the second downlink frequency within the next odd-numbered period adjacent to the current even-numbered period based on the retransmission response until the street light terminal receives an ACK from the corresponding gateway within the corresponding odd-numbered period, and synchronizes the data for different periods.

9. A periodic dual-frequency alternating data uplink and downlink processing system, characterized in that, The system executes a periodic dual-frequency alternating data uplink and downlink processing method as described in any one of claims 1-8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that is executed by a processor to implement a periodic dual-frequency alternating data uplink and downlink processing method as described in any one of claims 1-8.

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