CN106792844B - Data transmission method and device - Google Patents
Data transmission method and device Download PDFInfo
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- CN106792844B CN106792844B CN201611033253.4A CN201611033253A CN106792844B CN 106792844 B CN106792844 B CN 106792844B CN 201611033253 A CN201611033253 A CN 201611033253A CN 106792844 B CN106792844 B CN 106792844B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
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Abstract
The invention discloses a data transmission method and a data transmission device, which are applied to an intelligent meter, and the method comprises the following steps: if the data packet to be transmitted exists, determining a first frequency band according to information of at least two frequency bands stored by the data packet, wherein any two frequency bands of the at least two frequency bands are different; transmitting the data packet by adopting the first frequency band; and when the confirmation information of successful transmission is not received through the first frequency band, selecting a second frequency band, and transmitting the data packet by adopting the second frequency band, wherein the first frequency band is different from the second frequency band. The invention applies at least two frequency bands in the data transmission process, and the two frequency bands are different frequency bands, thereby solving the problem that the data can not be normally transmitted because the frequency band use conflict is sent when the intelligent meter uploads the data at regular time.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a data transmission method and apparatus.
Background
The LoRa technology is an ultra-long-distance low-power-consumption data transmission technology, has the characteristics of low power consumption, long distance and small data transmission quantity, can basically meet the requirements of the intelligent meter in the field of wireless communication, and can ensure the interoperability of the intelligent meters of different manufacturers and different product models in the large-range communication process based on the standard protocol of the Wide Area Network ultra-long-distance low-power-consumption data transmission technology (LoRaWAN).
Fig. 1 is a structural diagram of a LoRaWAN standard protocol system in the prior art, and as shown in fig. 1, each area is deployed with a base station Gateway12, the base station Gateway12 is installed with a communication module, and the communication module can perform data transmission with a plurality of smart meters 11 in a coverage area of the base station Gateway12 through a fixed frequency band. In a certain time period, a plurality of smart meters 11 transmit data to the frequency band at the same time, and there is a possibility that the data cannot be successfully transmitted due to the conflict of the use of the same frequency band.
Disclosure of Invention
The invention provides a data transmission method and a data transmission device, which are used for solving the problem that in the prior art, a plurality of intelligent meters transmit data to the same frequency band at the same time within a certain time period, so that the same frequency band can be used in a conflict and the data cannot be successfully transmitted.
In order to solve the above problem, the present invention provides a data transmission method, wherein if the smart table identifies that there is a data packet to be transmitted, the method comprises:
a1: selecting an unoccupied first frequency band according to information of at least two frequency bands which are stored by the device and successfully access the network and information of whether each frequency band is occupied currently, wherein any two frequency bands in the at least two frequency bands are different;
b1: transmitting the data packet by adopting the first frequency band; when the first frequency band is judged not to receive the confirmation information that the data packet is successfully sent, the first frequency band is marked as occupied;
c1: judging whether each frequency band stored by the self is occupied, if not, returning to the step A1; and if so, selecting a second frequency band, and sending the data packet by adopting the second frequency band.
Further, the receiving, through the first frequency band, the acknowledgement that the data packet was successfully transmitted includes:
updating the transmission failure times when the response information of the successful transmission of the data packet is not received through the first frequency band;
and judging whether the transmission failure times reach a set time threshold value, and if so, determining that the confirmation information of the successful transmission of the data packet is not received through the first frequency band.
Further, whether the sending failure times reach a set time threshold value is judged, and if not, the method further comprises the following steps:
and continuing to adopt the first frequency band to send the data packet.
Further, if the acknowledgement message that the data packet is successfully transmitted is not received through the second frequency band, the method further includes:
and continuing to adopt the second frequency band to send the data packet.
Further, if the acknowledgement message that the data packet transmission is successful is received through the second frequency band, the method further includes:
and identifying each frequency band stored in the intelligent meter as unoccupied.
Further, if the acknowledgement message that the data packet transmission is successful is received through the second frequency band, the method further includes:
updating the second frequency band into a transmission success record; recording the time point when the data packet is successfully sent;
the selecting the unoccupied first frequency band according to the information of the at least two frequency bands stored by the device and the information of whether each frequency band is occupied currently comprises the following steps:
calculating the difference between the current time and the time point of successful data packet transmission saved in the successful transmission record, and judging whether the difference is smaller than a set time threshold value;
and if so, selecting the unoccupied first frequency band.
Further, the process of pre-acquiring and storing the information of the at least two frequency bands successfully accessed to the network includes:
a2: selecting a non-network-connected frequency band aiming at information of at least two frequency bands stored by the base station and information of whether each frequency band is successfully connected to the network, and sending a network access request to the base station by adopting the non-network-connected frequency band;
b2: if the response information of successful network access is received through the frequency band which is not accessed to the network, the frequency band which is not accessed to the network is stored in the information of the frequency band which is successfully accessed to the network, the frequency band which is not accessed to the network is identified to be successfully accessed to the network, whether each frequency band is successfully accessed to the network is judged, and if not, the step A2 is returned.
Further, if the network access success response information is not received through the frequency band which is not accessed to the network, the method further comprises the following steps:
updating the transmission failure times when the response information of the successful transmission of the data packet is not received through the frequency band which is not accessed to the network;
and judging whether the transmission failure frequency reaches a set frequency threshold, if so, determining that the confirmation information of successful data packet transmission is not received through the frequency band which is not accessed to the network, and identifying the frequency band which is not accessed to the network as the frequency band which is not accessed to the network.
The invention provides a data transmission device, comprising:
the selection module is used for selecting an unoccupied first frequency band according to information of at least two frequency bands which are stored by the selection module and successfully access the network and information of whether each frequency band is occupied currently if the intelligent meter identifies that the data packet to be transmitted exists, wherein any two frequency bands of the at least two frequency bands are different;
a sending module, configured to send the data packet by using the first frequency band;
the first judgment identification module is used for identifying the first frequency band as occupied when judging that the confirmation information that the data packet is successfully sent is not received through the first frequency band;
the judging module is used for judging whether each frequency band stored by the judging module is occupied or not; if not, returning to the selection module; if yes, triggering a first selective sending module;
and the first selection sending module is used for selecting a second frequency band and sending the data packet by adopting the second frequency band.
Further, the first judgment identification module comprises:
the updating unit is used for updating the transmission failure times when the response information that the data packet is successfully transmitted is not received through the first frequency band;
and the judging and determining unit is used for judging whether the transmission failure times reach a set time threshold value, and if so, determining that the confirmation information of the successful data packet transmission is not received through the first frequency band.
Further, the determination unit is further configured to determine whether the number of failed sending times reaches a set number threshold, and if not, trigger the sending module.
Further, the first selective transmission module is further configured to:
and if the confirmation information that the data packet is successfully transmitted is not received through the second frequency band, continuously transmitting the data packet by adopting the second frequency band.
Further, the apparatus further comprises:
and the identification module is used for identifying each frequency band stored in the intelligent meter as unoccupied if the confirmation information that the data packet is successfully sent is received through the second frequency band.
Further, the apparatus further comprises:
an update recording module, configured to update the second frequency band into a transmission success record if a confirmation message that the data packet is successfully transmitted is received through the second frequency band; recording the time point when the data packet is successfully sent;
the selection module comprises:
a calculation judging unit, configured to calculate a difference between the current time and a time point at which the data packet stored in the transmission success record is successfully transmitted, and judge whether the difference is smaller than a set time threshold; if yes, triggering a selection unit;
a selection unit, configured to select the unoccupied first frequency band.
Further, the apparatus further comprises:
the second selection sending module is used for selecting the frequency band which is not accessed to the network according to the information of at least two frequency bands stored by the second selection sending module and the information of whether each frequency band is successfully accessed to the network, and sending a network access request to the base station by adopting the frequency band which is not accessed to the network;
and the storage judging module is used for storing the frequency band which is not accessed to the network into the information of the frequency band which is successfully accessed to the network if the response information of successful access to the network is received through the frequency band which is not accessed to the network, identifying the successful access to the network of the frequency band which is not accessed to the network, judging whether each frequency band is successfully accessed to the network or not, and returning to the second selective sending module if the frequency band is not successfully accessed to the network.
Further, the apparatus further comprises:
the updating module is used for updating the transmission failure times when the response information that the data packet is successfully transmitted is not received through the frequency band which is not accessed to the network;
and the second judgment identification module is used for judging whether the transmission failure times reach a set time threshold value, if so, determining that the confirmation information that the data packet is successfully transmitted is not received through the frequency band which is not accessed to the network, and identifying the frequency band which is not accessed to the network as a frequency band which is not accessed to the network successfully.
The invention provides a data transmission method and a device, if the intelligent table identifies that a data packet to be transmitted exists, the method comprises the following steps: a1: selecting an unoccupied first frequency band according to information of at least two frequency bands which are stored by the device and successfully access the network and information of whether each frequency band is occupied currently, wherein any two frequency bands in the at least two frequency bands are different; b1: transmitting the data packet by adopting the first frequency band; when the first frequency band is judged not to receive the confirmation information that the data packet is successfully sent, the first frequency band is marked as occupied; c1: judging whether each frequency band stored by the self is occupied, if not, returning to the step A1; and if so, selecting a second frequency band, and sending the data packet by adopting the second frequency band. Because the information of at least two frequency bands is stored in the intelligent table in the embodiment of the invention, namely the intelligent table can carry out data transmission with the base station based on the two frequency bands, when the intelligent table selects one frequency band to carry out data packet transmission unsuccessfully, namely the frequency band is occupied by other intelligent tables, the second frequency band can be selected to carry out data packet transmission, so that the problem that data can not be successfully transmitted due to frequency band use conflict can be effectively avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a diagram of a prior art LoRaWAN standard protocol system architecture for a low power wide area network;
fig. 2 is a schematic diagram of a data transmission method according to embodiment 1 of the present invention;
fig. 3 is a schematic diagram of a system based on the LoRaWAN standard protocol according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram of another system based on the LoRaWAN standard protocol according to embodiment 1 of the present invention;
fig. 5 is a flowchart of a data transmission method according to embodiment 2 of the present invention;
fig. 6 is a network access flow chart of a data transmission method according to embodiment 8 of the present invention;
fig. 7 is a structural diagram of a data transmission apparatus according to an embodiment of the present invention.
Detailed Description
In order to solve the problem that data cannot be successfully transmitted due to frequency band use conflict, embodiments of the present invention provide a data transmission method and apparatus.
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
fig. 2 is a schematic diagram of a data transmission method according to an embodiment of the present invention, where the method includes the following steps:
s201: and selecting an unoccupied first frequency band according to the information of at least two frequency bands which are stored by the first frequency band and successfully access the network and the information of whether each frequency band is occupied currently, wherein any two frequency bands in the at least two frequency bands are different.
The data transmission method provided by the embodiment of the invention is applied to the intelligent meter, the information of at least two frequency bands which are successfully accessed to the network and the information of whether each frequency band is occupied currently are pre-stored in the intelligent meter, wherein any two frequency bands in the at least two frequency bands are different. The information of at least two frequency bands stored in the intelligent meter can be manually configured in the intelligent meter in advance, and the information of the frequency bands can also be acquired and stored by the intelligent meter through data transmission with the base station within the range of the intelligent meter.
One of the base stations may be installed with a plurality of communication modules of different frequency bands, so that the information of the at least two frequency bands may be information of frequency bands of at least two different communication modules installed in the same base station, or in at least two base stations, one communication module is installed in each base station, where the frequency bands of the communication modules installed in the base stations are different. The intelligent meter also supports a plurality of frequency band communication modules, and one intelligent meter can also be provided with a plurality of communication modules with different frequency bands, so that the corresponding frequency bands can be adopted for transmitting data packets.
The frequency band of each communication module installed in the smart meter and the frequency band of each communication module installed in the base station may be in one-to-one correspondence. At least the information of the frequency band of each communication module installed in the base station is stored in the smart meter.
If when the data packet is sent, and a certain data packet is sent for the first time, the intelligent meter does not know whether each frequency band is occupied or not, at the moment, each frequency band can be marked as unoccupied, and when the first frequency band is selected, one frequency band can be selected at will.
S202: transmitting the data packet by adopting the first frequency band; and when the confirmation information that the data packet is successfully sent is not received through the first frequency band, the first frequency band is marked as occupied.
The process of sending the data packet by using the first frequency band belongs to the prior art, and is not described in detail in the embodiment of the present invention. After the intelligent meter transmits the data packet by adopting the first frequency band, if the first frequency band is not occupied, the data packet is transmitted to the base station, and the base station returns response information that the data packet is successfully transmitted to the intelligent meter. However, if the first frequency band is occupied by other smart meters, the data packet cannot be sent to the base station, and the smart meters cannot receive response information returned by the base station for the data packet. Therefore, in order to accurately identify whether the first frequency band is occupied, the determination may be made according to whether the acknowledgement message that the data packet was successfully transmitted is not received through the first frequency band.
Specifically, after the smart meter transmits the data packet by using the first frequency band, the timer is started, and whether response information of successful transmission of the data packet transmitted by the base station is received within the timing duration of the timer is judged, so that whether the first frequency band is occupied is determined.
After a certain frequency band is selected for transmitting the data packet, if the data packet cannot be successfully transmitted through the frequency band, the frequency band is indicated to be used by other intelligent meters, and at this time, the frequency band can be marked as occupied.
S203: judging whether each frequency band stored by the self is occupied, if not, returning to the step S201; if so, go to step S204.
S204: and selecting a second frequency band, and sending the data packet by adopting the second frequency band.
The intelligent table stores information of at least two frequency bands, and if the intelligent table transmits data through each frequency band but does not receive response information of successful data packet transmission returned by the base station, the intelligent table indicates that each frequency band is occupied. In order to ensure the successful transmission of the data packet, the smart meter needs to select a second frequency band for transmitting the data packet. If the unoccupied frequency band exists currently, one of the unoccupied frequency bands can be selected for transmitting the data packet.
The selecting of the second frequency band may be any selection among all occupied frequency bands, or may be performed according to a preset rule, where the preset rule may be a selection according to the frequency bands, for example, the smart meter selects the highest frequency band as the second frequency band among the unoccupied frequency bands.
Specifically, in the embodiment of the present invention, two communication modules in different frequency bands may be deployed in the base station, so as to implement data transmission. Fig. 3 is a schematic diagram of a system architecture based on a LoRaWAN standard protocol according to an embodiment of the present invention, where as shown in fig. 3, an intelligent meter includes a main control module 31 and a wireless communication module Node module 32, the main control module 31 is configured to control information acquisition, and the Node module 32 is installed on the intelligent meter and can perform data interaction with the main control module 31. In the architecture diagram of the LoRaWAN standard protocol system, the system further includes a base station Gateway33 and a network side device, wherein the wireless communication module Node module 32 and the base station Gateway33 are both hardware supporting multiple frequency bands, the base station Gateway33 is provided with a first frequency band module 331 and a second frequency band module 332, and the first frequency band module 331 and the second frequency band module 332 are modules with different frequency bands. The network side equipment comprises a network server NServer34, an application server AServer35 and an operation system 36.
The specific data transmission process shown in fig. 3 is as follows: when the intelligent meter performs data interaction with network side equipment, the main control module 31 on the intelligent meter encrypts a data packet, the Node module 32 sends the data packet to the base station Gateway33 by using the first frequency band corresponding to the first frequency band module 331, when the confirmation information of successful sending is not received through the first frequency band, the second frequency band corresponding to the second frequency band module 332 is selected to send the data packet to the base station Gateway33, the base station Gateway33 is only a transfer station and does not perform any processing on the data packet, after receiving the data packet, the second frequency band module 332 of the base station Gateway33 sends the data packet to the network server NServer34, the network server NServer34 sends the data packet to the application server AServer35, the application server AServer35 sends the data packet to the operation system 36, and the operation system 36 performs data packet decryption.
The process of encrypting the data packet by the main control module 31 on the smart meter and decrypting the data packet by the operation system 36 belongs to the prior art, and is not described in detail in the embodiment of the present invention.
In the embodiment of the present invention, two base stations may also be deployed, and one communication module is deployed in each base station, and the frequency bands of the two communication modules are different, thereby implementing data transmission. Fig. 4 is a schematic diagram of another system architecture based on the LoRaWAN standard protocol according to an embodiment of the present invention, which is different from fig. 3, and fig. 4 includes a first frequency band base station Gateway431 and a second frequency band base station Gateway432, where the first frequency band base station Gateway431 is deployed with a communication module of a first frequency band, and the second frequency band base station Gateway432 is deployed with a communication module of a second frequency band, and the first frequency band and the second frequency band are different frequency bands.
The specific data transmission process shown in fig. 4 is as follows: when the intelligent meter performs data interaction with network side equipment, a main control module 41 on the intelligent meter encrypts a data packet, a Node module 42 adopts a first frequency band corresponding to a first frequency band base station Gateway431 to send the data packet to the first frequency band, when confirmation information of successful sending is not received through the first frequency band, a second frequency band corresponding to a second frequency band base station Gateway432 is selected to send the data packet to the second frequency band, the first frequency band base station Gateway431 and the second frequency band base station Gateway432 are only transfer stations and do not perform any processing on the data packet, after the second frequency band of the second frequency band base station Gateway432 receives the data packet, the data packet is sent to a network server NServer44, the network server NServer44 sends the data packet to an application server AServer45, the application server AServer45 sends the data packet to an operation system 46, and the system 46 performs data packet decryption.
The process of encrypting the data packet by the main control module 41 on the smart meter and decrypting the data packet by the operation system 46 belongs to the prior art, and is not described in detail in the embodiment of the present invention.
Because the information of at least two frequency bands is stored in the intelligent table in the embodiment of the invention, namely the intelligent table can carry out data transmission with the base station based on the two frequency bands, when the intelligent table selects one frequency band to carry out data packet transmission unsuccessfully, namely the frequency band is occupied by other intelligent tables, the second frequency band can be selected to carry out data packet transmission, so that the problem that data can not be successfully transmitted due to frequency band use conflict can be effectively avoided.
Example 2:
after the intelligent meter sends the data packet through the first frequency band, the timer is started, whether response information of successful data packet sending sent by the base station is received or not is judged within the timing duration of the timer, and as long as the response information of successful sending is not received, the confirmation information of successful data packet sending is not received, and at the moment, the intelligent meter can select the second frequency band to send the data packet.
However, when the base station and the smart meter transmit the data packet based on the LoRa, the data packet is likely to be affected by the external environment, which may result in unsuccessful transmission, for example, there is a separation between the base station and the smart meter, but the external environment may change. Therefore, in order to avoid unsuccessful data transmission due to interference of the external environment, on the basis of the above-mentioned embodiments, in the embodiments of the present invention,
the receiving, through the first frequency band, the acknowledgement information that the data packet was successfully transmitted includes:
updating the transmission failure times when the response information of the successful transmission of the data packet is not received through the first frequency band;
and judging whether the transmission failure times reach a set time threshold value, and if so, determining that the confirmation information of the successful transmission of the data packet is not received through the first frequency band.
The set time threshold is pre-stored in the smart meter, wherein the set time threshold may be 1 time, 2 times, 5 times, or the like.
After the intelligent meter sends the data packet through the first frequency band, the timer is started, whether response information of successful sending of the data packet sent by the base station is received or not is judged within the timing duration of the timer, if the response information of successful sending is not received, the confirmation information of successful sending of the data packet is not received, but the influence of the external environment is large in the data transmission process, and in order to avoid unsuccessful data sending caused by the interference of the external environment, in the embodiment of the invention,
judging whether the sending failure times reach a set time threshold value, if not, the method also comprises the following steps:
and continuing to adopt the first frequency band to send the data packet.
In the following description with a specific embodiment, fig. 5 is a flowchart of a data transmission method according to an embodiment of the present invention, where the method shown in fig. 5 includes the following steps:
s501: and if the intelligent meter identifies that the data packet to be transmitted exists, selecting an unoccupied first frequency band according to the information of at least two frequency bands which are stored by the intelligent meter and successfully accessed to the network and the information whether each frequency band is occupied currently, and sending the data packet by adopting the first frequency band.
The intelligent meter starts a timer after sending a data packet through the first frequency band.
S502: and judging whether response information of successful transmission of the first frequency band is received, if so, performing S507, and if not, performing S503.
The intelligent meter judges whether response information of successful data packet transmission sent by the first frequency band of the base station is received within the timing duration of the timer, the timing duration of the timer is pre-stored in the intelligent meter, and the timing duration of the timer can be 5 seconds, 10 seconds or 15 seconds and the like.
S503: and updating the transmission failure times of the first frequency band, judging whether the failure times reach a set time threshold, if so, performing S504, and if not, performing S501.
And the intelligent meter judges whether the transmission failure times reach a set time threshold value, and if so, the intelligent meter determines that response information of successful data packet transmission is not received through the first frequency band.
And if not, the intelligent meter continuously adopts the first frequency band to send the data packet.
The set time threshold is pre-stored in an intelligent table, and the condition that the sending fails due to the interference of the external environment can be avoided by judging whether the sending failure time reaches the set time threshold, wherein the set time threshold can be 1 time, 2 times or 5 times and the like.
S504: and determining that the data packet is not successfully transmitted through the first frequency band. The first frequency band is identified as occupied.
After the intelligent meter transmits the data packet by adopting the first frequency band, if the first frequency band is not occupied, the data packet is transmitted to the base station, and the base station returns response information that the data packet is successfully transmitted to the intelligent meter. However, if the first frequency band is occupied by other smart meters, the data packet cannot be sent to the base station, and the smart meters cannot receive response information returned by the base station for the data packet. Therefore, in order to accurately identify whether the first frequency band is occupied, the determination may be made according to whether the acknowledgement message that the data packet was successfully transmitted is not received through the first frequency band.
Specifically, after the smart meter transmits the data packet by using the first frequency band, the timer is started, and whether response information of successful transmission of the data packet transmitted by the base station is received within the timing duration of the timer is judged, so that whether the first frequency band is occupied is determined.
After a certain frequency band is selected for transmitting the data packet, if the data packet cannot be successfully transmitted through the frequency band, the frequency band is indicated to be used by other intelligent meters, and at this time, the frequency band can be marked as occupied.
S505: and judging whether each frequency band stored by the self is occupied, if not, returning to the step S501, and if so, performing the step S506.
S506: and selecting a second frequency band, and sending the data packet by adopting the second frequency band.
The intelligent table stores information of at least two frequency bands, and if the intelligent table transmits data through each frequency band but does not receive response information of successful data packet transmission returned by the base station, the intelligent table indicates that each frequency band is occupied. In order to ensure the successful transmission of the data packet, the smart meter needs to select a second frequency band for transmitting the data packet. If the unoccupied frequency band exists currently, one of the unoccupied frequency bands can be selected for transmitting the data packet.
The selecting of the second frequency band may be any selection in all occupied frequency bands, or may be performed according to a preset rule, where the preset rule may be a selection according to the frequency band, for example, the smart meter selects the highest frequency band as the second frequency band in the occupied frequency bands.
S507: and finishing transmitting the data to the frequency band.
In the embodiment of the invention, the set frequency threshold value is pre-stored in the intelligent meter, and when the sending failure frequency does not reach the set frequency threshold value, the intelligent meter adopts the first frequency band to send the data packet, thereby avoiding unsuccessful data sending caused by the interference of the external environment.
Example 3:
if the smart meter selects the second frequency band to transmit the data packet in each occupied frequency band, in order to successfully transmit the data packet, on the basis of the above embodiments, in the embodiments of the present invention,
if the acknowledgement message that the data packet is successfully transmitted is not received through the second frequency band, the method further comprises:
and continuing to adopt the second frequency band to send the data packet.
If each frequency band is marked as occupied, it indicates that each frequency band capable of performing data transmission by the intelligent meter is occupied when the data packet is transmitted, but in order to realize the transmission of the data packet, the intelligent meter can continue to transmit the data packet by using a second frequency band, which can be the frequency band used when the data packet is transmitted last time. Of course, if each frequency band is marked as occupied, in order to implement the transmission of the data packet, the smart meter may also arbitrarily select one frequency band from the information of each frequency band marked as occupied, and transmit the data packet using the frequency band until the data packet is successfully transmitted. Of course, if each frequency band is marked as occupied, when the smart meter selects one frequency band for data packet transmission, if the frequency band is adopted for transmission for several times or the transmission is not successful, other frequency bands can be reselected for continuous transmission, as long as the data packet can be successfully transmitted finally.
In this embodiment of the present invention, if the acknowledgement information that the data packet is successfully transmitted is received through the second frequency band, the method further includes:
and identifying each frequency band stored in the intelligent meter as unoccupied.
If the confirmation information that the data packet is successfully sent is received through the second frequency band, the data packet is successfully sent by the intelligent meter, each frequency band stored in the intelligent meter is marked as unoccupied, and the other data packets can be conveniently sent continuously.
In the embodiment of the invention, as long as the data packet is successfully transmitted through a certain frequency band, each frequency band is marked as unoccupied for the convenience of the next data packet transmission.
Example 4:
in order to improve the success rate of sending data packets, on the basis of the above embodiments, in the embodiments of the present invention,
if the confirmation information that the data packet is successfully sent is received through the second frequency band, the method further comprises the following steps:
updating the second frequency band into a transmission success record; recording the time point when the data packet is successfully sent;
the selecting the unoccupied first frequency band according to the information of the at least two frequency bands stored by the device and the information of whether each frequency band is occupied currently comprises the following steps:
calculating the difference between the current time and the time point of successful data packet transmission saved in the successful transmission record, and judging whether the difference is smaller than a set time threshold value;
and if so, selecting the unoccupied first frequency band.
And the intelligent table stores a success record, and the success record stores frequency band information and successful transmission time adopted when the data packet is successfully transmitted last time when the data packet is transmitted last time. The information of the frequency band used when the data packet is transmitted last time is recorded in the success record, and after the data packet is transmitted last time, each frequency band identifier is not occupied.
If the difference value is smaller than the set time threshold, it is indicated that the data packet is sent soon after the data packet is sent last time, because the time interval is short, the frequency band which is successfully sent last time may not be occupied by other intelligent meters, and therefore, the frequency band can be continuously used when the data packet is sent this time. Since the frequency band information of successfully transmitting the data packet is recorded in the success record when the data packet is transmitted last time, the first frequency band can be selected according to the frequency band information stored in the success record when the data packet is transmitted this time.
However, if the difference is not less than the set time threshold, it indicates that the time interval between two adjacent data packet transmissions is relatively large, and the frequency band successfully transmitted last time is likely to be already occupied, so that the frequency band information stored in the successful record may not be referred to during selection. Of course, when the difference is not less than the set time threshold, the frequency band stored in the successful record may also be determined as the first frequency band when the first frequency band is selected.
After the intelligent meter successfully sends the data packet through a certain frequency band, the frequency band is updated to the success record after receiving the confirmation information of the successful sending of the data packet, and the time point of the successful sending of the data packet by adopting the frequency band is recorded, so that the reference is made during the frequency band selection during the next data packet sending, the data packet can be successfully sent through the first selected frequency band to a certain extent, the resources of the intelligent meter are saved, and the success rate of the sending of the data packet is improved.
Example 5:
on the basis of the above embodiments, the smart meter pre-stores information of at least two frequency bands that successfully access the network. The process of pre-acquiring and storing the information of at least two frequency bands successfully accessed to the network comprises the following steps:
a2: selecting a non-network-connected frequency band aiming at information of at least two frequency bands stored by the base station and information of whether each frequency band is successfully connected to the network, and sending a network access request to the base station by adopting the non-network-connected frequency band;
b2: if the response information of successful network access is received through the frequency band which is not accessed to the network, the frequency band which is not accessed to the network is stored in the information of the frequency band which is successfully accessed to the network, the frequency band which is not accessed to the network is identified to be successfully accessed to the network, whether each frequency band is successfully accessed to the network is judged, and if not, the step A2 is returned.
The intelligent meter can be provided with a plurality of frequency band communication modules, after the intelligent meter is installed, the intelligent meter can carry out network access operation according to each frequency band, and if the network access is successful, the frequency band can be adopted when the data packet is sent subsequently.
Specifically, if the information of a plurality of frequency bands is stored in the smart meter, and after the smart meter is installed, network access is not successful in each frequency band, a non-network-access frequency band is selected arbitrarily, a network access request is sent to the base station by using the non-network-access frequency band, and if network access success response information is received through the non-network-access frequency band, the non-network-access frequency band is stored in the information of the network access successful frequency band, the network access success of the non-network-access frequency band is identified, and network access operation is performed sequentially aiming at each non-network-access frequency band until network access is successful in each frequency band.
However, there may be a case where a communication module in a certain frequency band is deployed in the smart meter, but the communication module in the frequency band is not deployed in the base station, so that the smart meter fails to access the network in the frequency band. However, a new base station may be added subsequently, the newly added base station is deployed with a communication module of the frequency band, or the communication module of the frequency band is added to the original base station, so that the subsequent smart meter can use the frequency band to transmit the data packet. However, because the information of the frequency band that is successfully accessed to the network and stored in the smart table does not include the information of the frequency band, in the embodiment of the present invention, the process of acquiring and storing the information of at least two frequency bands that are successfully accessed to the network in advance may be performed periodically, for example, every year, or every half year.
Fig. 6 is a network access flow chart of a data transmission method according to an embodiment of the present invention, and as shown in fig. 6, the smart meter itself stores information of two frequency bands that are not networked, where a third frequency band and a fourth frequency band are two different frequency bands. The network access process shown in fig. 6 includes the following steps:
s601: and if the information of the plurality of frequency bands stored in the intelligent meter fails to access the network under the plurality of frequency bands, selecting a frequency band which does not access the network, and sending a network access request to the base station by adopting the frequency band which does not access the network.
The selecting of the frequency band which is not successfully accessed to the network may be performed at will in all frequency bands which are not successfully accessed to the network, or may be performed according to a preset rule, where the preset rule may be performed according to the frequency band, for example, the smart meter selects the highest frequency band as the frequency band which is not successfully accessed to the network in all frequency bands which are not successfully accessed to the network.
The process of sending a network access request to a base station by using the frequency band which is not accessed to the network belongs to the prior art, and the embodiment of the invention is not described in detail.
And the intelligent meter starts a timer after sending a network access request through the frequency band which is not accessed to the network.
S602: judging whether network access success response information of the frequency band which is not accessed to the network is received or not; if yes, go to S605, if no, go to S603;
and the intelligent table judges whether the network access success response information sent by the frequency band which is not accessed to the network of the base station is received within a second timing duration of the timer, wherein the second timing duration of the timer is pre-stored in the intelligent table, and can be 5 seconds, 10 seconds, 15 seconds or the like.
S603: updating the transmission failure times of the frequency band which is not accessed to the network, judging whether the failure times reach a set time threshold value, and if so, performing S604; if not, the frequency band is taken as the non-network-access frequency band, and a process of sending a network access request to the base station by using the non-network-access frequency band in the step S601 is performed.
And the intelligent meter judges whether the failure times reach a set time threshold value, and if so, the intelligent meter determines that the network access success confirmation information is not received through the frequency band which is not accessed to the network.
If not, the intelligent meter continuously adopts the frequency band which is not accessed to send a network access request to the base station.
The set time threshold is pre-stored in an intelligent table, and the condition that the sending fails due to the interference of the external environment can be avoided by judging whether the sending failure time reaches the set time threshold, wherein the set time threshold can be 1 time, 2 times or 5 times and the like.
S604: and determining that the successful network access confirmation information is not received through the frequency band which is not accessed to the network, and identifying the frequency band which is not accessed to the network as the unsuccessful network access frequency band.
After the intelligent meter sends the network access request to the base station by adopting the frequency band which is not accessed to the network, if the frequency band which is not accessed to the network can be successfully accessed to the network, the network access request is sent to the base station, and the base station also returns network access success response information of the network access request to the intelligent meter. However, if the frequency band which is not accessed to the network cannot be successfully accessed to the network, the network access request cannot be sent to the base station, and the smart meter cannot receive network access success response information returned by the base station for the network access request. Therefore, in order to accurately identify whether the frequency band which is not accessed to the network can be successfully accessed to the network, the judgment can be made according to whether the response information of successful network access is not received through the frequency band which is not accessed to the network.
Specifically, after the intelligent meter sends the network access request by using the frequency band which is not accessed to the network, the intelligent meter starts a timer, and judges whether network access success response information returned by the base station for the network access request is received within a second timing duration of the timer, so as to determine whether the frequency band which is not accessed to the network can be successfully accessed to the network.
And if the information of the frequency band which is not accessed to the network is stored in the base station, the frequency band which is not accessed to the network can be successfully accessed to the network.
After a certain frequency band which is not accessed to the network is selected to send a network access request to a base station, if the network access request cannot be successfully sent through the frequency band which is not accessed to the network, the frequency band which is not accessed to the network is indicated to be not successfully accessed to the network, and the frequency band which is not accessed to the network is marked as a frequency band which is not successfully accessed to the network.
S605: and storing the frequency band which is not accessed to the network into the information of the frequency band which is successfully accessed to the network, and identifying that the frequency band which is not accessed to the network is successfully accessed to the network.
After a certain frequency band which is not accessed to the network is selected to send a network access request to a base station, if the network access request can be successfully sent through the frequency band which is not accessed to the network, the frequency band which is not accessed to the network is identified to be successfully accessed to the network.
S606: and judging whether each frequency band is successfully accessed to the network, if not, returning to the step S601, and if so, performing the step S607.
S607: and finishing the network access process.
And the intelligent meter judges that each frequency band stored by the intelligent meter is successfully accessed to the network, and the network access process is finished.
Because the plurality of frequency bands which are not accessed to the network are stored in the intelligent meter in the embodiment of the invention for network access, if at least two frequency bands which are not accessed to the network can be successfully accessed to the network, namely the intelligent meter can carry out data transmission with the base station based on at least two frequency bands, when the intelligent meter selects one frequency band to carry out the transmission of the data packet unsuccessfully, namely the frequency band is occupied by other intelligent meters, other frequency bands can be selected to carry out the transmission of the data packet, and therefore, the problem that the data can not be successfully transmitted due to the use conflict of the frequency bands can be effectively avoided.
Fig. 7 is a structural diagram of a data transmission apparatus according to an embodiment of the present invention.
An embodiment of the present invention provides a data transmission apparatus, where the apparatus includes:
the selection module 71 is configured to, if the smart meter identifies that a data packet to be transmitted exists, select an unoccupied first frequency band according to information of at least two frequency bands which are stored by the smart meter and successfully access a network and information of whether each frequency band is occupied currently, where any two frequency bands of the at least two frequency bands are different;
a sending module 72, configured to send the data packet by using the first frequency band;
the first judgment identification module 73 is configured to identify the first frequency band as occupied when judging that the acknowledgement message that the data packet is successfully transmitted is not received through the first frequency band;
the judging module 74 is configured to judge whether each frequency band stored by the judging module is occupied; if not, returning to the selection module; if yes, triggering a first selective sending module;
the first selecting and sending module 75 is configured to select a second frequency band, and send the data packet using the second frequency band.
The first judgment identification module 73 includes:
an updating unit 731, configured to update the transmission failure times when the response information indicating that the data packet is successfully transmitted is not received through the first frequency band;
a determining unit 732, configured to determine whether the transmission failure number reaches a set number threshold, and if so, determine that the acknowledgement that the data packet was successfully transmitted is not received through the first frequency band.
The determination unit 732 is further configured to determine whether the sending failure number reaches a set number threshold, and if not, trigger the sending module.
The first selective transmission module 75 is further configured to:
and if the confirmation information that the data packet is successfully transmitted is not received through the second frequency band, continuously transmitting the data packet by adopting the second frequency band.
The device further comprises:
and an identification module 76, configured to identify each frequency band stored in the smart meter as being unoccupied if the confirmation information that the data packet is successfully sent is received through the second frequency band.
The device further comprises:
an update recording module 77, configured to update the second frequency band into a transmission success record if the acknowledgement information that the data packet is successfully transmitted is received through the second frequency band; recording the time point when the data packet is successfully sent;
the selection module 71 includes:
a calculation and determination unit 711, configured to calculate a difference between the current time and a time point at which the data packet stored in the transmission success record is successfully transmitted, and determine whether the difference is smaller than a set time threshold; if yes, triggering a selection unit;
a selecting unit 712, configured to select the unoccupied first frequency band.
The device further comprises:
a second selection sending module 78, configured to select, according to the information of the at least two frequency bands stored in the second selection sending module and the information of whether each frequency band succeeds in accessing the network, a frequency band that is not accessed to the network, and send a network access request to the base station by using the frequency band that is not accessed to the network;
and a saving and judging module 79, configured to, if a successful network access response message is received through the frequency band that is not networked, save the frequency band that is not networked into the information of the frequency band that is successfully networked, identify that the frequency band that is not networked is successfully networked, judge whether each frequency band is successfully networked, and if not, return to the second selective sending module.
The device further comprises:
an updating module 710, configured to update the transmission failure times when the response information that the data packet is successfully transmitted is not received through the frequency band that is not networked;
a second determination identifying module 713, configured to determine whether the transmission failure frequency reaches a set frequency threshold, and if so, determine that the acknowledgement information that the data packet is successfully transmitted is not received through the frequency band that is not accessed to the network, and identify the frequency band that is not accessed to the network as a frequency band that is not accessed to the network.
The invention provides a data transmission method and a device, if the intelligent table identifies that a data packet to be transmitted exists, the method comprises the following steps: a1: selecting an unoccupied first frequency band according to information of at least two frequency bands which are stored by the device and successfully access the network and information of whether each frequency band is occupied currently, wherein any two frequency bands in the at least two frequency bands are different; b1: transmitting the data packet by adopting the first frequency band; when the first frequency band is judged not to receive the confirmation information that the data packet is successfully sent, the first frequency band is marked as occupied; c1: judging whether each frequency band stored by the self is occupied, if not, returning to the step A1; and if so, selecting a second frequency band, and sending the data packet by adopting the second frequency band. Because the information of at least two frequency bands is stored in the intelligent table in the embodiment of the invention, namely the intelligent table can carry out data transmission with the base station based on the two frequency bands, when the intelligent table selects one frequency band to carry out data packet transmission unsuccessfully, namely the frequency band is occupied by other intelligent tables, the second frequency band can be selected to carry out data packet transmission, so that the problem that data can not be successfully transmitted due to frequency band use conflict can be effectively avoided.
For the system/apparatus embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference may be made to some descriptions of the method embodiments for relevant points.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (14)
1. A data transmission method applied to an intelligent table, wherein if the intelligent table identifies that a data packet to be transmitted exists, the method comprises:
a1: selecting an unoccupied first frequency band according to information of at least two frequency bands which are stored by the device and successfully access the network and information of whether each frequency band is occupied currently, wherein any two frequency bands in the at least two frequency bands are different;
b1: transmitting the data packet by adopting the first frequency band; when the first frequency band is judged not to receive the confirmation information that the data packet is successfully sent, the first frequency band is marked as occupied;
c1: judging whether each frequency band stored by the self is occupied, if not, returning to the step A1; if so, selecting a second frequency band, and sending the data packet by adopting the second frequency band;
if the confirmation information that the data packet is successfully sent is received through the second frequency band, the method further comprises the following steps:
updating the second frequency band into a transmission success record; recording the time point when the data packet is successfully sent;
the selecting the unoccupied first frequency band according to the information of the at least two frequency bands stored by the device and the information of whether each frequency band is occupied currently comprises the following steps:
calculating the difference between the current time and the time point of successful data packet transmission saved in the successful transmission record, and judging whether the difference is smaller than a set time threshold value;
and if so, selecting the unoccupied first frequency band.
2. The method of claim 1, wherein the receiving no acknowledgement of successful transmission of the data packet over the first frequency band comprises:
updating the transmission failure times when the response information of the successful transmission of the data packet is not received through the first frequency band;
and judging whether the transmission failure times reach a set time threshold value, and if so, determining that the confirmation information of the successful transmission of the data packet is not received through the first frequency band.
3. The method of claim 2, wherein determining whether the number of transmission failures reaches a set number threshold, and if not, the method further comprises:
and continuing to adopt the first frequency band to send the data packet.
4. The method of claim 1, wherein if the acknowledgement of successful transmission of the data packet is not received through the second frequency band, the method further comprises:
and continuing to adopt the second frequency band to send the data packet.
5. The method of claim 1, wherein if an acknowledgement is received over the second frequency band that the data packet was successfully transmitted, the method further comprises:
and identifying each frequency band stored in the intelligent meter as unoccupied.
6. The method of claim 1, wherein the process of pre-acquiring and storing the information of the at least two frequency bands successfully accessed to the network comprises:
a2: selecting a non-network-connected frequency band aiming at information of at least two frequency bands stored by the base station and information of whether each frequency band is successfully connected to the network, and sending a network access request to the base station by adopting the non-network-connected frequency band;
b2: if the response information of successful network access is received through the frequency band which is not accessed to the network, the frequency band which is not accessed to the network is stored in the information of the frequency band which is successfully accessed to the network, the frequency band which is not accessed to the network is identified to be successfully accessed to the network, whether each frequency band is successfully accessed to the network is judged, and if not, the step A2 is returned.
7. The method of claim 6, wherein if the response message of successful network access is not received through the frequency band without network access, the method further comprises:
updating the transmission failure times when the response information of the successful transmission of the data packet is not received through the frequency band which is not accessed to the network;
and judging whether the transmission failure frequency reaches a set frequency threshold, if so, determining that the confirmation information of successful data packet transmission is not received through the frequency band which is not accessed to the network, and identifying the frequency band which is not accessed to the network as the frequency band which is not accessed to the network.
8. A data transmission apparatus, characterized in that the apparatus comprises:
the selection module is used for selecting an unoccupied first frequency band according to information of at least two frequency bands which are stored by the selection module and successfully access the network and information of whether each frequency band is occupied currently if the intelligent meter identifies that the data packet to be transmitted exists, wherein any two frequency bands of the at least two frequency bands are different;
a sending module, configured to send the data packet by using the first frequency band;
the first judgment identification module is used for identifying the first frequency band as occupied when judging that the confirmation information that the data packet is successfully sent is not received through the first frequency band;
the judging module is used for judging whether each frequency band stored by the judging module is occupied or not; if not, returning to the selection module; if yes, triggering a first selective sending module;
the first selection sending module is used for selecting a second frequency band and sending the data packet by adopting the second frequency band;
the device further comprises:
an update recording module, configured to update the second frequency band into a transmission success record if a confirmation message that the data packet is successfully transmitted is received through the second frequency band; recording the time point when the data packet is successfully sent;
the selection module comprises:
a calculation judging unit, configured to calculate a difference between the current time and a time point at which the data packet stored in the transmission success record is successfully transmitted, and judge whether the difference is smaller than a set time threshold; if yes, triggering a selection unit;
a selection unit, configured to select the unoccupied first frequency band.
9. The apparatus of claim 8, wherein the first determination identification module comprises:
the updating unit is used for updating the transmission failure times when the response information that the data packet is successfully transmitted is not received through the first frequency band;
and the judging and determining unit is used for judging whether the transmission failure times reach a set time threshold value, and if so, determining that the confirmation information of the successful data packet transmission is not received through the first frequency band.
10. The apparatus of claim 9, wherein the determining unit is further configured to determine whether the number of transmission failures reaches a set threshold number of times, and if not, trigger the transmitting module.
11. The apparatus of claim 8, wherein the first means for selectively transmitting is further configured to:
and if the confirmation information that the data packet is successfully transmitted is not received through the second frequency band, continuously transmitting the data packet by adopting the second frequency band.
12. The apparatus of claim 8, wherein the apparatus further comprises:
and the identification module is used for identifying each frequency band stored in the intelligent meter as unoccupied if the confirmation information that the data packet is successfully sent is received through the second frequency band.
13. The apparatus of claim 8, wherein the apparatus further comprises:
the second selection sending module is used for selecting the frequency band which is not accessed to the network according to the information of at least two frequency bands stored by the second selection sending module and the information of whether each frequency band is successfully accessed to the network, and sending a network access request to the base station by adopting the frequency band which is not accessed to the network;
and the storage judging module is used for storing the frequency band which is not accessed to the network into the information of the frequency band which is successfully accessed to the network if the response information of successful access to the network is received through the frequency band which is not accessed to the network, identifying the successful access to the network of the frequency band which is not accessed to the network, judging whether each frequency band is successfully accessed to the network or not, and returning to the second selective sending module if the frequency band is not successfully accessed to the network.
14. The apparatus of claim 13, wherein the apparatus further comprises:
the updating module is used for updating the transmission failure times when the response information that the data packet is successfully transmitted is not received through the frequency band which is not accessed to the network;
and the second judgment identification module is used for judging whether the transmission failure times reach a set time threshold value, if so, determining that the confirmation information that the data packet is successfully transmitted is not received through the frequency band which is not accessed to the network, and identifying the frequency band which is not accessed to the network as a frequency band which is not accessed to the network successfully.
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| CN110418295A (en) * | 2018-04-28 | 2019-11-05 | 杭州莱宸科技有限公司 | A kind of wireless multi-band communication method and system based on Lora |
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