CN117729609A

CN117729609A - Network residence control method and device of narrowband internet of things communication equipment and electronic equipment

Info

Publication number: CN117729609A
Application number: CN202211103476.9A
Authority: CN
Inventors: 曾定立; 林紫微; 杨地勇; 周俨; 张琴
Original assignee: China Mobile Communications Group Co Ltd; China Mobile IoT Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile IoT Co Ltd
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2024-03-19

Abstract

The application provides a network residence control method of narrowband internet of things communication equipment, and relates to the technical field of communication. The method comprises the following steps: after the narrowband internet of things NB-IoT communication device completes the network residence flow, determining a current frequency point where the NB-IoT communication device is located and a neighboring frequency point corresponding to the current frequency point as target frequency points, and clearing information of other frequency points. According to the scheme, after network residence is completed, only the current frequency point and the adjacent frequency points are saved to serve as the priority frequency point, the rest history frequency points are cleared, the network searching time can be effectively shortened, the network searching time under a scene that the frequency points are changed can be reduced, and better use experience is provided for a user.

Description

Network residence control method and device of narrowband internet of things communication equipment and electronic equipment

Technical Field

The application relates to the technical field of communication, in particular to a network residence control method and device of a narrowband internet of things communication device and an electronic device.

Background

The narrowband internet of things (NB-IoT) communication module is widely applied to meter terminals with the advantages of low cost, wide coverage and low power consumption. The NB-IoT communication modules currently on the market all adopt a general-purpose software system, and provide AT instructions conforming to the 3GPP (3 rd Generation Partnership Project, third generation partnership project) specification and vendor-defined general AT instructions, such as MQTT (message queue telemetry transport), HTTP (hypertext transfer protocol), coAP (CoAP protocol), LWM2M (light M2M ) and other network protocol applied AT instructions, and the meter vendor sends the general AT instructions to the NB-IoT communication module through a module plug-in MCU (micro control unit) and obtains a response result. The meter terminal adopting the general software system has the following defects: the method has the advantages that a large number of meter terminals are installed and used in a centralized manner in the same communication cell, and the problems of network congestion, long network residence time, network residence failure and the like are easily caused due to the limited bandwidth of the communication cell; there is still room for optimization of power consumption.

Disclosure of Invention

The purpose of the application is to provide a network residence control method and device of a narrow-band internet of things communication device and an electronic device, so as to optimize technical defects of a meter terminal of a general software system.

To achieve the above objective, an embodiment of the present application provides a network residence control method of a narrowband internet of things communication device, including:

after the narrowband internet of things NB-IoT communication device completes the network residence flow, determining a current frequency point where the NB-IoT communication device is located and a neighboring frequency point corresponding to the current frequency point as target frequency points, and clearing information of other frequency points.

Optionally, before the narrowband internet of things NB-IoT communication device completes the network residence flow, the method further comprises:

dividing the NB-IoT communication devices into N groups, determining a random delay time corresponding to each NB-IoT communication device for each NB-IoT communication device in each group, and determining a preset buffer time among different groups; wherein N is a positive integer;

and carrying out a network searching process at the random delay time, and executing a network residence process after the network searching process is finished.

Optionally, after the NB-IoT communication device completes the network-resident flow, the NB-IoT communication device further comprises performing low power control in at least one of the following manners:

Using a low power mode;

after the NB-IoT communication device completes communication, turning off a power module of the NB-IoT communication device;

dynamically configuring a low power consumption mode or powering off a power module of the NB-IoT communication device.

Optionally, dynamically configuring a low power consumption mode or powering off a power module of the NB-IoT communication device includes:

after the NB-IoT communication device completes a network residence process, acquiring a login flag bit of the NB-IoT communication device;

when the login flag bit is a first value, recovering cloud preset data through a preset flash memory;

according to the cloud preset data, sending data to the cloud, and determining a sending result;

and dynamically configuring a low power consumption mode or turning off a power supply module of the NB-IoT communication device according to the sending result.

Optionally, dynamically configuring a low power consumption mode or turning off a power module of the NB-IoT communication device according to the transmission result includes:

when the number of transmission failures of the transmission result is smaller than a first preset value, determining that the NB-IoT communication device configures a low-power consumption mode;

and when the number of transmission failures of the transmission result is greater than or equal to the first preset value, determining to turn off a power supply module of the NB-IoT communication device.

Optionally, the method further comprises:

when the login flag bit is a second value, determining a login result of the NB-IoT communication device on a login remote end;

when the registration failure times of the registration result are smaller than a second preset value, determining that the NB-IoT communication device configures a low-power consumption mode;

determining to turn off a power module of the NB-IoT communication device when the number of registration failures of the registration result is greater than or equal to the second preset value;

and when the registration result is successful, determining that the login flag bit is the first numerical value, sending data to the cloud, and determining a sending result.

determining a first frequency band of a first network, wherein the first frequency band is a network frequency band of the first network supported by a target operator, and the target operator is an operator to which a user identity identification card currently used by narrowband internet of things (NB-IoT) communication equipment belongs;

if the first frequency band has the first frequency point/first cell, searching the frequency point in the first frequency band and determining a second cell; the first frequency point is frequency point information pre-stored by the NB-IoT communication device; the first cell is a resident target cell on the first frequency point;

And carrying out network residence flow in the second cell.

Optionally, the method further comprises:

if a first frequency point exists on the first frequency band, determining whether a resident target cell exists on the first frequency point;

if no resident target cell exists on the first frequency band, searching the frequency band in the first frequency band, and determining a second cell;

and if the resident target cell exists on the first frequency point, carrying out a network resident process on the resident target cell.

Optionally, the method further comprises:

after the NB-IoT communication device is started/waken up in a dormant mode, acquiring the voltage or the temperature of the NB-IoT communication device;

when the voltage or the temperature exceeds a first threshold range, early warning information is sent to a cloud;

determining whether the voltage or the temperature is in a second threshold range when the voltage or the temperature is below the first threshold range; the second threshold range is less than the first threshold range;

and re-executing the step of acquiring the voltage or temperature of the NB-IoT communication device when the NB-IoT communication device is determined to enter a connected state when the NB-IoT communication device is in the second threshold range.

To achieve the above objective, an embodiment of the present application further provides a network residence control device of a narrowband internet of things communication device, including:

The first processing module is used for determining a current frequency point where the narrow-band internet of things (NB-IoT) communication equipment is located and a neighboring frequency point corresponding to the current frequency point as a target frequency point after the narrow-band internet of things (NB-IoT) communication equipment completes a network residence flow, and clearing information of other frequency points.

To achieve the above object, embodiments of the present application further provide an electronic device, including: a transceiver, a processor, a memory, and a program or instructions stored on the memory and executable on the processor; the processor, when executing the program or instructions, implements the network residence control method of the narrowband internet of things communication device according to any one of the above.

To achieve the above object, an embodiment of the present application further provides a readable storage medium having stored thereon a program or instructions that, when executed by a processor, implement the steps in the network residence control method of the narrowband internet of things communication device as set forth in any one of the above.

The beneficial effects of the technical scheme of the application are as follows:

according to the technical scheme, after the narrow-band internet of things NB-IoT communication equipment completes the network residence process, the current frequency point where the NB-IoT communication equipment is located and the adjacent frequency point corresponding to the current frequency point are determined to be target frequency points, and other frequency point information is cleared.

Drawings

Fig. 1 is a flow chart of a network residence control method of a narrowband internet of things communication device according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an application of a random delay model according to an embodiment of the present application;

FIG. 3 is a control flow diagram for power consumption optimization provided by an embodiment of the present application;

FIG. 4 is a control flow diagram of network residence optimization provided in an embodiment of the present application;

FIG. 5 is a flow chart of monitoring control of voltage/temperature provided in an embodiment of the present application;

fig. 6 is a schematic architecture diagram of a network-resident control system of a narrowband internet of things communication device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a network residence control device of the narrowband internet of things communication device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present application more apparent, the following detailed description will be given with reference to the accompanying drawings and the specific embodiments.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present application, it should be understood that the sequence numbers of the following processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

In addition, the terms "system" and "network" are often used interchangeably herein.

In the examples provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.

Here, first, an AT instruction will be described:

the sending and receiving of the short message is realized by an AT instruction according to the specification of a communication interface of a GSM network and is mainly divided into a Block mode (Block mode), a Text mode (Text mode) and a protocol data unit (Protocol data unit, PDU) mode according to the specification of GSM 07.07. With the development of technology, the block mode of data transmission in binary coding has been gradually eliminated, and the text mode and the PDU mode belong to an interface protocol for communication using AT commands.

AT, attention, instruction set is sent from Terminal equipment (Terminal Equipment, TE) or data Terminal equipment (Data Terminal Equipment, DTE) to Terminal Adapter (TA) or data circuit Terminal equipment (Data Circuit Terminal Equipment, DCE). The AT command is sent to the terminal adapter by the terminal equipment, and then the terminal adapter analyzes the AT command, so as to control the mobile equipment to realize various network functions.

The AT command is a standard interface, the command format and the return command are fixed, and the main grammar characteristics are as follows:

(1) All AT commands begin with AT, ending with < CR > (i.e., enter key) in the format < enter > < line feed > < response content > < enter > < line feed >. The enter key is a flag that indicates the end of the instruction, and the module responds immediately after receiving the enter key.

(2) If the AT command is executed successfully, the method returns OK; if the AT instruction syntax is incorrect or execution fails, then an "ERROR" is returned.

(3) Multiple instructions may be sent consecutively, but the instructions must be separated by spaces.

The AT command is the only way for the PC to operate the handset through the serial port.

Here, it should be noted that, because the driving instructions of the GPRS/GSM chip depend on the AT instructions, the main control chip sends the AT instructions corresponding to various services through the serial port to realize the communication with the user mobile phone. According to the features of a GSM response mechanism and serial port transmission data, a function for sending an AT command is compiled, and after the AT command is sent to a chip, the command is returned to judge whether the working state is normal, so that the aim can be achieved by only sending one AT command instead of only sending one AT command, and the data of a serial port buffer area are required to be cleaned for conveniently sending different AT commands.

As shown in fig. 1, an embodiment of the present application provides a network residence control method of a narrowband internet of things communication device, including:

step 101, after a narrowband internet of things NB-IoT communication device completes a network residence process, determining a current frequency point where the NB-IoT communication device is located and a neighboring frequency point corresponding to the current frequency point as a target frequency point, and clearing information of other frequency points.

It should be noted that, meter terminal refers to NB-IoT communication equipment such as gas meter, ammeter, water gauge, and the like, and the meter terminal is characterized in that: low cost, large number, wide geographical distribution, low requirement for communication instantaneity, low cost, wide coverage and low power consumption of NB-IoT communication devices, but the following drawbacks: the AT instructions are numerous, and a Micro Control Unit (MCU) is required to complete additional functions of operation, control, storage and the like, so that the MCU has higher cost; a large number of meter terminals are installed and used in a centralized manner in the same communication cell, so that the problems of network congestion, long network residence time, network residence failure and the like are caused; there is still room for optimization of power consumption.

According to the method and the device, the network residence flow of the meter terminal is optimized, after network residence is completed, only the current frequency point and the adjacent frequency points are saved, and the current frequency point and the adjacent frequency points are determined as target frequency points, namely the prior frequency points, and other historical frequency points are cleared; the scene network search time may also be reduced in the event of a change scene at the frequency point of the NB-IoT communication device.

step 102, dividing the NB-IoT communication devices into N groups, determining a random delay time corresponding to each NB-IoT communication device for each NB-IoT communication device in each group, and determining a preset buffer time between different groups; wherein N is a positive integer;

and 103, performing a network searching process at the random delay time, and executing a network residence process after the network searching process is finished.

Because the meter terminal is fixed in installation and application places and large in number in the same area, if a large number of meters reside on the network or transmit data at the same time under the same base station frequency point and cell, mutual interference, network congestion and noise rise of NB-IoT communication equipment can be caused, so that the terminal side resides on the network for a long time and data transmission fails, and power consumption is increased. In order to solve the problem, after the NB-IoT communication equipment is started, network residence or data transmission is delayed, so that the purposes of peak-staggering network residence and peak-staggering data transmission are achieved, the success rate of network residence and data transmission is improved, and the power consumption of a module is reduced.

The NB-IoT communication device provides a random delay network residence model, reduces the number of the gauge terminals connected with RRC in the same time, randomly divides the gauge terminals into N groups, reserves a buffer interval between each group, enables the concurrent network residence quantity of the terminals to be 1/N of the prior art, enables most of the terminals of the group to access and release the RRC connection by the buffer interval, and then generates random delay to enable the concurrent time of the gauge terminals to be prolonged, and accordingly solves the problems of network residence and packet issuing failure caused by concurrent network residence and packet issuing of a large number of modules of the same communication cell.

After the NB-IoT communication device is started, a random delay time is generated by a random delay model of the NB-IoT communication device, and in the time, the module closes a protocol stack and enters a deep sleep mode, so that power consumption is saved. NB-IoT communication devices network congestion, mutual interference of terminals, etc. are mainly caused by that there are a large number of terminals RRC connected not released or performing RRC connection request, data transmission and reception simultaneously, so to solve the network congestion and interference problems, it is necessary to make peak shifting for the duration of time from the first connection of RRC to the last RRC release of the same meter terminal in the same zone.

In a specific embodiment, fig. 2 provides a schematic diagram of a random delay model, in the random delay model, T is a random value, generated by a random algorithm built in an NB-IoT communication device, N is a table terminal packet maximum value, N is a positive integer, T1 is a sum of a maximum time for the NB-IoT communication device to start to camp on a network in each packet, T4 is a sum of a maximum time for completing releasing RRC connection for each packet and a buffer time, N, T, T4 are configured by an MCU through an AT instruction, T2 is an actual time for the table terminal to initiate an RRC request, T3 is a table terminal release RRC connection time, and N is an actual number of each packet terminal. The meter products of the same area are randomly divided into N groups, taking grouping 0 as an example, each terminal randomly selects time T to start searching network in 0 to T1 time, after searching a proper cell, time T2 initiates RRC connection request, time T3 completes network residence, uplink and downlink data service and releases RRC connection, the time theoretical value of the uplink and downlink data service is (T1+T2), and buffer time (T4-T3) is reserved between each group, so that network searching, network residence time and data service time difference of different NB-IoT communication devices can be met, and when grouping 2 starts searching network, most terminals of grouping 1 complete RRC connection release.

If random delay and packet network residence are not used, n×n terminals concurrently residence and transmit and receive data in (T3-T2), and the random delay model only has N terminals to residence in (t1+t2).

In combination with the above step 101, only one frequency point and its neighboring cell are saved, and if there is a saved frequency point and the frequency point can reside, the NB-IoT communication device does not need to perform a BAND (frequency BAND) search step, i.e., a network searching procedure. However, if there are no saved frequency points, the NB-IoT communication device will enter a BAND search, which searches frequency points in the frequency range one by one, for example, BAND 8 contains 350 frequency points, each frequency point takes 80ms to search quickly, and 28s is needed to search quickly for the complete BAND 8. Thus, for whether there is a saved frequency point for any NB-IoT communication device, the time differences shown in fig. 2 are large, so that each packet can complete the network-resident, uplink data traffic within the time expected for each packet, any NB-IoT communication device network-resident delay steps are as follows:

after the NB-IoT communication equipment is started, judging whether stored frequency points exist or not, if so, executing the second step, and if not, executing the third step;

Generating a random number M in a range of 0-N and a random number T in a range of 0-T1 by using a Monte Carlo method, and executing a fourth step;

step three, predicting network searching time T through a gray prediction GM (1, 1) model according to network searching time recorded by NB-IoT communication equipment, generating a random number M in a range of 0-N and a random number T in a range of 0- (T1-T) by a Monte Carlo method, and executing step four;

step four, NB-IoT communication device delay m×t1+t.

The random numbers are generated by using the Monte Carlo method, and compared with the random numbers generated by using the linear congruence method, the random numbers can be uniformly distributed, the gray prediction GM (1, 1) model has the advantages of short time sequence, less statistical data and incomplete information, and the method has the advantages of convenience in operation and high modeling precision, and is suitable for NB-IoT communication equipment with limited computing capacity.

After the delay time-out, the NB-IoT communication device automatically wakes up from deep sleep, opens a protocol stack, reads USIM card PLMN (Public Land Mobile Network ) information, matches BAND supported by an operator according to PLMN information to complete BAND locking, whether a stored frequency point exists in a BAND frequency range of the locked BAND or not, initiates link establishment if the stored frequency point exists and a cell which can reside exists, completes network residence, and enters BAND fast search and slow search frequency points if no or no cell which can reside exists. After the NB-IoT communication device completes network residence, the rest history frequency point records are cleared, and only the current residence frequency point and the adjacent frequency point information thereof are reserved.

step 104, using a low power mode (PSM mode); here, after entering the PSM mode, the preset hardware group is turned off. In this embodiment, the preset hardware set includes a CPU, a memory, a radio frequency, and a SIM card module; exiting PSM mode; restarting the preset hardware group after exiting the PSM mode; the protocol stack is rerun.

Step 105, after the NB-IoT communication device completes communication, turning off a power supply module of the NB-IoT communication device;

step 106, dynamically configuring a low power consumption mode or powering off a power module of the NB-IoT communication device.

In the first implementation manner of step 104, after the NB-IoT communication device completes the primary reporting, the NB-IoT communication device does not disconnect the network, but uses a low power consumption mode (PSM) to perform low power consumption control, enters the PSM state, has lower power consumption in the PSM state, can keep an online state all the time, only does not transmit data, does not need to reattach the network when the data needs to be reported again, saves the power consumption of network searching, wakes up again by the NB-IoT communication device, and directly reports the data.

Specifically, the power consumption of NB-IoT communication devices using PSM is shown in table 1 below, where R represents the number of days, and in meter applications, meter reading is typically performed in units of months, for example, when r=30, the total power consumption of a meter is: 215+259.2x30=7991 mAs, it can be seen that the characteristic of the meter length period is relatively high power consumption using PSM technology.

Table 1: power consumption table for NB-IoT communication devices using PSM

In the second implementation manner of step 105, after the NB-IoT communication device completes communication, the power supply module of the NB-IoT communication device is turned off, and it is also understood that a customizable acquisition frequency time controller is set in the NB-IoT communication device, and the time controller has a self-power-off restarting function, and is automatically powered off after the NB-IoT communication device acquisition period is completed, so that the power consumption of the NB-IoT communication device is reduced.

Specifically, the power consumption of the direct power-off mode after the NB-IoT communication device receives and transmits data is shown in the following table 2, where R represents the number of days, N represents the time for data up and down, and compared with the first implementation, in the second implementation, the power consumption of the NB-IoT communication device is 0 in the meter reading period interval, so that PSM power consumption is reduced, and because in the second implementation, after the NB-IoT communication device is powered off, the NB-IoT communication device is restarted, the cloud platform or the server registers, and the login context information is lost, the NB-IoT communication device can search for the network again, reside in the network, register and log in the cloud platform to complete the cloud platform or the server data reporting, so that the RRC connection duration and the number of data transmission packets are also increased, and the time for logging in and registering the cloud platform is generally within 20s, and therefore, the total power consumption of one period of the scheme is 833+8×20=993 mAs. When the schedule transmits data cycle days r=2, the power consumption of the first implementation is 733.4mAs, and thus, when R is 2 or less, the first implementation is superior to the second implementation, and when R is 3 or more, the second implementation is superior to the first implementation.

Table 2: power consumption meter for direct power-off mode after NB-IoT communication device receives and transmits data

In the third implementation manner of step 106, the above first implementation manner and the second implementation manner are combined, that is, PSM is used for retransmission packets with shorter communication anomaly period, and power-off manner is used for meter reading data transmission packets with longer communication anomaly period, so that power consumption and flow are saved by dynamic adjustment.

Optionally, step 106 includes:

step 107, after the NB-IoT communication device completes the network residence process, acquiring a login flag bit of the NB-IoT communication device;

step 108, recovering cloud preset data from a preset flash memory when the login flag bit is a first value;

step 109, according to the cloud preset data, sending data to the cloud, and determining a sending result;

step 110, dynamically configuring a low power consumption mode or turning off a power supply module of the NB-IoT communication device according to the transmission result.

In this embodiment, after the NB-IoT communication device is powered on and network resident, it is determined whether the login flag bit is a first value, where the first value is 1, that is, the login flag bit is 1 after the NB-IoT communication device is powered on, the module recovers cloud preset data from the preset Flash memory (Flash), that is, reads and recovers cloud platform or server registration, login information and context, and then the NB-IoT communication device directly sends the data. The flow saves NB-IoT uplink and downlink data of cloud platform or server registration login, and reduces RRC connection duration.

According to the application characteristics of long meter reading period of the NB-IoT communication equipment (meter terminal), the power-off and PSM technology is dynamically selected to be mixed, the meter selects a power-off mode to achieve low power consumption under the condition of successful data transmission, and the meter terminal wakes up to retransmit data after entering PSM for a plurality of hours under the condition of data transmission failure. After the module is successfully registered and logged on to the cloud platform or the server, the registration and login context information is backed up, the flag bit is marked on the Flash, and when the module is restarted, the registration and login context information and the flag bit are recovered from the Flash, so that data can be directly sent without repeated registration and login to the server, and power consumption and flow are saved.

Optionally, step 110 includes:

step 111, determining that the NB-IoT communication device configures a low power consumption mode when the number of transmission failures of the transmission result is smaller than a first preset value;

step 112, determining to turn off the power supply module of the NB-IoT communication device when the number of transmission failures of the transmission result is greater than or equal to the first preset value.

In the application, if the transmission result is that the platform registration keep-alive time is overtime, and the number of transmission failures is smaller than a first preset value, the first preset value is configured by the MCU through the AT instruction, then the NB-IoT communication device records the number of failures, and uses the RAI (release auxiliary information) technology to realize the RRC connection fast release, and because the data transmission period is smaller than or equal to 2 days, the PSM power consumption is better than the power consumption of the power-off mode, so that the PSM period is within 2 days, and the data is retransmitted after waking up after overtime. The RAI technology is used in the flow, so that the RRC connection duration time can be shortened, the power consumption is reduced, the data transmission fails, the network abnormality and other factors in the current time period can be eliminated by retransmitting the data within 2 days, and the packet sending success rate is improved.

When the number of transmission failures of the transmission result is greater than or equal to the first preset value, determining that data transmission fails, wherein the failure reason is that the platform registration keep-alive time is overtime, which means that the life cycle of the registration information of the NB-IoT communication device on the cloud platform or the server is technical, and the registration is needed to be re-registered and re-registered, and the sign position is 0 and the registration is performed again, at the moment, the conditions of successful data transmission are similar, powering off the NB-IoT communication device, disconnecting the power supply, waiting for the next meter reading period and powering on again, so that a power supply module of the NB-IoT communication device is powered off, and the power is further reduced.

Optionally, the method further comprises:

step 113, when the login flag bit is a second value, determining a login result of the NB-IoT communication device to log in the remote end;

it should be noted that the second value is a value other than 1, and here, by way of example, 0 is used to distinguish whether the flag bit is valid or not from the first value.

Step 114, determining that the NB-IoT communication device configures a low power consumption mode when the number of registration failures of the registration result is less than a second preset value;

step 115, when the number of registration failures of the registration result is greater than or equal to the second preset value, determining to turn off a power supply module of the NB-IoT communication device;

And 116, when the registration result is successful, determining that the login flag bit is the first numerical value, sending data to a cloud, and determining a sending result.

In the application, when the registration failure times of the registration result is greater than or equal to the second preset value, the MCU sends a simplified AT instruction to the NB-IoT communication device to log in to the cloud platform server, if successful, the cloud platform or server registration, login information and context are saved to Flash, a login flag bit is determined to be the first value, that is, the login flag bit is set to be 1, data is sent, if the data is sent successfully, the NB-IoT communication device is powered off, power is disconnected, and the next meter reading period is waited for powering on and powering on again.

In step 114 and step 115, when the number of registration failures of the registration result is smaller than a second preset value, that is, the number of failures of registering and logging in the cloud platform is smaller than the second preset value, the second preset value is configured by the MCU through the AT command, the NB-IoT communication device records the number of failures, and the rapid release of RRC connection is implemented by using the RAI technology, and since the PSM power consumption is better than the power consumption of the power-off mode when the data transmission period is less than or equal to 2 days, the PSM power consumption is better than the power consumption of the power-off mode when the PSM period is less than or equal to 2 days, and the data is retransmitted after the wakeup after the timeout.

In a specific embodiment, as shown in fig. 3, in combination with the above steps 107 to 116, a specific method for dynamically configuring a low power consumption mode or turning off a power supply module of the NB-IoT communication device is provided, so as to optimize RRC connection, network residence, and data transmission, and power consumption is better than the above first implementation manner and the above second implementation manner. The module in fig. 3 refers to NB-IoT communication devices.

In the present application, PSM is used for retransmission packets with a shorter communication anomaly period, and a power-off method is used for meter reading data transmission packets with a longer communication period. The RAI technology is applied to the PSM mode, so that the RRC connection duration in the first implementation mode can be reduced; by using a cloud platform or server registration, login information and context Flash storage and recovery mode, the uplink and downlink data volume is reduced, the data transmission power consumption in the second implementation mode is reduced by 8N, and the RRC connection time is reduced by 2/3. Under the condition of successful communication, the power consumption statistics in the application are shown in the following table 3, and when the meter reading frequency is more than 2 days, the optimization scheme of the application is superior to the first implementation mode and the second implementation mode.

Table 3: power consumption tables for NB-IoT communication devices employing a third implementation

According to the power consumption optimization flow, according to the application characteristics of a meter terminal with a long meter reading period, the power-off and PSM technology dynamically selects mixed application, and under the condition of successful data transmission, the meter selects a power-off mode to realize low power consumption, and under the condition of data transmission failure, the meter is selected to enter the PSM for several hours and then wakes up to resend data. After the NB-IoT communication device successfully registers and logs in the cloud platform or the server, the registration and login context information is backed up, the flag bit is marked to Flash, and when the NB-IoT communication device is powered on again, the registration and login context information and the flag bit are recovered from the Flash, so that data can be directly sent, and the registration and login of the server is not required to be repeated, so that power consumption and flow are saved.

It should be noted that, the NB-IoT communication device searches for the network generally in the order of history frequency point record, fast search BAND (frequency BAND) list frequency point, slow search BAND list frequency point, and the present application optimizes the network for the characteristics of fixed meter installation application place and large number of the same area.

step 117, determining a first frequency band of a first network, where the first frequency band is a network frequency band of the first network supported by a target operator, and the target operator is an operator to which a user identity identification card currently used by a narrowband internet of things NB-IoT communication device belongs;

According to the method and the device, the BAND information corresponding to the operator can be locked according to USIM card (universal subscriber identity module) information, a scene can be changed after the frequency point is covered, and network searching time of the scene can be reduced. Specifically, the currently used operator is confirmed according to the USIM card, and the corresponding preset frequency band in the preset frequency band list is obtained according to the type of the operator.

Step 118, if the first frequency band has the first frequency point/the first cell, searching the first frequency band for the frequency point, and determining the second cell; the first frequency point is frequency point information pre-stored by the NB-IoT communication device; the first cell is a resident target cell on the first frequency point;

step 119, performing a network residence flow in the second cell.

In this embodiment, by determining whether a stored frequency point, that is, a first frequency point, exists on the first frequency BAND, or after determining the first frequency point, further determining whether a cell which can reside, that is, a first cell, exists on the first frequency point, and under the condition that any condition is not satisfied, performing frequency point search, including BAND fast search, slow search, and the like, so as to find a suitable cell, that is, determining a second cell, and performing link establishment in the second cell to complete a network residence flow.

Optionally, the method further comprises:

step 120, if a first frequency point exists on the first frequency band, determining whether a target cell which can reside exists on the first frequency point;

step 121, if no resident target cell exists on the first frequency band, searching the frequency band in the first frequency band, and determining a second cell;

step 122, if the target cell capable of being resided exists on the first frequency point, performing a network residency process on the target cell capable of being resided.

The method further comprises the step of searching the frequency point in the first frequency band and determining a second cell if the first frequency point does not exist in the first frequency band. According to the method, a preset frequency band quick search process is conducted on a first frequency band, when the frequency points of the preset frequency band are successfully obtained, a cell to be selected is searched in the frequency points of the preset frequency band, and a terminal selects the cell to be selected to conduct a cell residence process. The beneficial effects are that: compared with full-frequency-band searching, the searching process based on the preset frequency band can greatly reduce the searching frequency spectrum width, so that the searching time is saved. The preset frequency band searching process is not limited by regions, and can well support the terminal in a mobile state to search frequency points and search cells. The preset frequency band information may be placed in factory settings.

Further preferably, when the frequency point of the preset frequency band is not obtained through the preset frequency band fast search process, the preset frequency band enhancement slow search process is performed, and when the frequency point of the preset frequency band is successfully obtained through the preset frequency band enhancement slow search process, a cell to be selected is searched in the frequency point of the preset frequency band, and the terminal selects the cell to be selected to perform a cell residence process.

In another embodiment, as shown in fig. 4, after the module is started, the module generates a random delay time by a random delay model, the module closes a protocol stack, enters deep sleep, waits for the delay time to be overtime, opens the protocol stack, reads a USIM card, locks a first frequency BAND, judges whether a stored frequency point exists in the first frequency BAND, if not, performs BAND fast search and slow search frequency points, and finds a suitable cell; if so, further judging whether the stored frequency point has a resident cell, if not, performing BAND fast search and slow search on the frequency point, finding out a proper cell, if so, initiating link establishment to complete network resident, and storing the frequency point and neighbor cell clearing history frequency point records thereof. The module herein refers to NB-IoT communication devices.

Optionally, the method further comprises:

step 123, after the NB-IoT communication device is booted/waken up by dormancy, acquiring a voltage or a temperature of the NB-IoT communication device;

step 124, when the voltage or the temperature exceeds a first threshold range, sending early warning information to the cloud;

step 125, when the voltage or the temperature is below the first threshold range, determining whether the voltage or the temperature is in a second threshold range; the second threshold range is less than the first threshold range;

step 126, when the NB-IoT communication device is determined to enter a connected state while in the second threshold range, re-executing the step of acquiring the voltage or temperature of the NB-IoT communication device.

As shown in fig. 5, after the module is started or waken up by dormancy, an ADC (analog-digital converter) collects the voltage and temperature of Vbat (voltage pin) of the module, and judges whether the voltage or temperature exceeds the range, if yes, an alarm event is reported to a simplified AT instruction module, a serial port outputs the voltage or temperature alarm event to an MCU, the MCU controls a meter terminal to send out an alarm, and reports the voltage and temperature alarm to a cloud management platform; if not, judging whether the voltage or the temperature is close to the critical value, and if so, re-executing the step of acquiring the voltage or the temperature of the NB-IoT communication device when the module enters the connected state. The module in fig. 5 refers to NB-IoT communication devices.

In one embodiment, after the NB-IoT communication device module is started, the VBAT power supply voltage and the chip temperature of the module are collected through an ADC interface built in the baseband chip, then whether the voltage or the temperature exceeds the acceptable range of the meter is judged, if the voltage or the temperature exceeds the acceptable range of the meter, an alarm event is reported to the simplified AT instruction module, alarm information is output to the MCU serial port by the AT instruction simplified module, after the MCU receives the alarm information, the meter terminal is controlled to prompt the under-voltage alarm and the temperature alarm of the battery, and the voltage or the temperature alarm information is sent to the cloud platform, and the alarm information is recorded, so that accident analysis is facilitated.

As shown in fig. 6, an embodiment of the present application provides a system architecture diagram of NB-IoT communication devices applied to a meter, comprising: the system comprises a hardware driving module, an NB-IoT protocol stack, a voltage/temperature monitoring module, an application layer protocol, a network searching optimizing module, a power consumption optimizing module, a storage/operation module, a LOG module (LOG module), a firmware security authentication module and a simplified AT instruction module.

According to the method, an AT command is simplified through a simplified AT command module, the network residence, communication, one-key connection of a cloud platform or a server, data transmission, data storage, encryption and other applications of meter terminals such as an ammeter, a water meter and a gas meter are realized, and the functions such as battery monitoring, LOG recording and firmware safety protection are realized, so that the method is convenient to develop, complete in function and safe to use; the random delay network residence model is provided, so that the number of meter terminals connected by RRC (Radio Resource Control ) in the same time is reduced, the concurrency time is prolonged, and the problems of network residence and packet issuing failure caused by concurrent network residence and packet issuing of a large number of modules in the same communication cell are solved; the network residence optimization flow of the meter is provided, which is different from the existing NB-IoT communication equipment, according to the characteristics of fixed installation address and low probability of frequency point change of the meter, after network residence is completed, only the current frequency point and the adjacent frequency points thereof are saved as priority frequency points, and the rest historical frequency points are cleared, so that the network searching time can be effectively shortened; providing a power consumption optimization flow, dynamically selecting mixed application of power outage and PSM technology according to the application characteristics of long meter reading period, applying RAI technology to PSM scheme, and reducing RRC connection time; the cloud platform or the server is used for registering, logging in information and storing and recovering the context Flash, so that the uplink and downlink data quantity is reduced. After the module is successfully registered and logged on to the cloud platform or the server, the registration and login context information is backed up, the flag bit is marked on the Flash, and when the module is restarted, the registration and login context information and the flag bit are recovered from the Flash, so that data can be directly sent without repeated registration and login to the server, and power consumption and flow are saved.

In this application, the power consumption optimization module may implement the embodiments of the steps 104 to 116, and achieve the same technical effects, which are not described herein again.

In this application, the voltage/temperature monitoring module may implement the embodiments of the steps 123 to 126, and achieve the same technical effects, which are not described herein again.

In the application, the network searching optimization module: the NB-IoT communication device searches for the network generally in the sequence of history frequency point record, fast search BAND list frequency point and slow search BAND list frequency point, and the proposed software system optimizes the network according to the characteristics of fixed meter installation application places and large number of the same area.

In this application, the hardware driving module: the system mainly comprises hardware resources such as Uart (Universal Asynchronous Receiver/Transmitter, universal asynchronous receiver Transmitter), ADC (analog-to-digital converter), FLASH (FLASH memory), RTC (real-time clock chip), timer and the like.

In this application, the NB-IoT protocol stack: the method realizes the signal processing of the NB-IoT communication protocol, provides communication and protocol basis for an application layer protocol, a network searching optimization module and a power consumption optimization module, and instructs an API function by the 3GPP protocol specification.

In this application, the application layer protocol module: the method realizes the TCP/IP, TLS/DTLS, coAP, LWM2M, MQTT, HTTP and other application layer communication protocols required by NB-IoT, the functions of FOTA upgrade (Firmware Over-the-Air upgrade), cloud platform connection and the like, and provides the functions of simplifying the AT instruction module to call the API function and simplifying the AT instruction.

In this application, the storage/operation module: the voltage, the temperature, the application protocol context, the history frequency point record and the MCU can store data by simplifying AT instructions, and the meter can acquire the data.

In this application, LOG module: and recording the failure reason of the communication equipment, and storing the data acquisition record into the storage/operation module so as to read out the data directly through a serial port when the meter is abnormal. 2. And (5) externally connecting a LOG tool, and outputting each functional module LOG in real time.

In this application, the firmware security authentication module: the safety authentication module is used for encrypting and protecting factory information and preventing IMEI, radio frequency and calibration data from being tampered; and the signature and encryption are required to be completed before the firmware is downloaded and safely authenticated and upgraded by a downloading tool or FOTA, so that the firmware is prevented from being re-burned and damaged.

Simplifying the AT instruction module: and simplifying AT instructions, providing the MCU to send and respond to the AT by the serial port, and enabling the module to integrate the simplified instructions such as the cloud platform, the MQTT, the HTTP and the like, so as to realize the configuration of parameters of the network searching optimizing module and the power consumption optimizing module by the AT instructions. The MCU only needs to execute an AT instruction of 'AT+PLTCFG= < platform >', wherein the value range of 'platform >' is 0 to n, and the different cloud platforms can be selected for access, the values respectively represent n cloud platforms or servers, when the meter needs to send data, only the 'AT+DATASEND= < data >', wherein 'AT+DATASEND >' is the data to be sent, and the NB-IoT communication device can complete the processes of judging the flag bit in the power consumption optimization module, logging in the cloud platform or server, recovering Flash data and the like. When the voltage/temperature monitoring module alarms, an AT instruction report message is output to the MCU, and the MCU calls 'AT+DATASEND' to send an alarm message to the cloud platform. The simplified AT instruction module solves the problems that AT instructions are numerous in the prior art, and the MCU is required to complete additional functions such as operation, control and storage, so that the MCU cost is high.

In summary, the simplified AT instruction module provided by the NB-IoT communication device in the system of the present application implements network residence, communication, one-key connection with a cloud platform or server, data transmission, data storage, encryption, and other applications for the meter terminals such as an electric meter, a water meter, and a gas meter, and develops functions such as battery monitoring, LOG recording, firmware security protection, and is convenient, complete in function, and safe in use.

In the system, NB-IoT communication equipment provides peak-staggering network-residency and peak-staggering packet-sending functions, so that a large number of modules of the same communication cell can be subjected to peak-staggering network-residency and packet-sending, and the success rate of network-residency and packet-sending is improved; the system provides a random delay network residence model, optimizes the network searching process and shortens the network residence period.

In the system, the NB-IoT communication equipment provides a power consumption optimization flow, the power outage and the PSM are dynamically configured according to the fixed delivery characteristic of the meter, the network searching and resident flow after the power outage and the restarting is optimized, the network resident time after the power outage is reduced, and the power consumption caused by logging in a registration cloud platform or a server after the power outage and the restarting is reduced.

The system architecture provided by the application provides a simplified AT instruction, realizes the application of network residence, communication, one-key connection of a cloud platform or a server, data transmission, data storage, encryption and the like aiming AT meter terminals such as an ammeter, a water meter, a gas meter and the like, and develops the functions such as battery monitoring, LOG recording, firmware safety protection and the like conveniently, has complete functions and is safe to use.

In summary, according to the network residence control method and system for the narrowband internet of things communication equipment, after network residence is completed, only the current frequency point and the adjacent frequency points thereof are saved as the priority frequency points, and the rest of history frequency points are cleared.

As shown in fig. 7, an embodiment of the present application provides a network residence control device of a narrowband internet of things communication device, including:

the first processing module 701 is configured to determine, after the narrowband internet of things NB-IoT communication device completes a network residence flow, a current frequency point where the NB-IoT communication device is located and a neighboring frequency point corresponding to the current frequency point as target frequency points, and clear information of remaining frequency points.

In this application, the above-mentioned network residence control device further includes:

a second processing module, configured to divide the NB-IoT communication devices into N groups, determine, for each NB-IoT communication device in each group, a random delay time corresponding to each NB-IoT communication device, and determine that a preset buffer time exists between different packets; wherein N is a positive integer;

and the third processing module is used for carrying out the network searching process at the random delay time and executing the network residence process after the network searching process is finished.

In this application, the network residence control device further includes a fourth processing module, where the fourth processing module includes:

a first processing unit for using a low power consumption mode;

a second processing unit, configured to turn off a power module of the NB-IoT communication device after the NB-IoT communication device completes communication;

And a third processing unit configured to dynamically configure a low power consumption mode or turn off a power module of the NB-IoT communication device.

In this application, the third processing unit includes:

a first obtaining subunit, configured to obtain a login flag bit of the NB-IoT communication device after the NB-IoT communication device completes a network residence flow;

the first processing subunit is used for recovering cloud preset data from the preset flash memory when the login flag bit is a first numerical value;

the first determining subunit is used for sending data to the cloud according to the cloud preset data and determining a sending result;

and the second processing subunit is used for dynamically configuring a low-power consumption mode or switching off a power supply module of the NB-IoT communication device according to the sending result.

Optionally, the second processing subunit is specifically configured to:

A fourth processing unit, configured to determine a registration result of the NB-IoT communication device to log in to a remote end when the login flag bit is a second value;

a fifth processing unit, configured to determine that the NB-IoT communication device configures a low power consumption mode when the number of registration failures of the registration result is less than a second preset value;

a sixth processing unit, configured to determine to turn off a power module of the NB-IoT communication device when the number of registration failures of the registration result is greater than or equal to the second preset value;

and the seventh processing unit is used for determining that the login flag bit is the first numerical value, sending data to the cloud and determining a sending result when the registration result is successful.

a fifth processing module, configured to determine a first frequency band of a first network, where the first frequency band is a network frequency band of the first network supported by a target operator, and the target operator is an operator to which a user identity identification card currently used by an NB-IoT communication device in the narrowband internet of things is attached;

a sixth processing module, configured to perform frequency point search in the first frequency band if a first frequency point/first cell exists in the first frequency band, and determine a second cell; the first frequency point is frequency point information pre-stored by the NB-IoT communication device; the first cell is a resident target cell on the first frequency point;

And the seventh processing module is used for carrying out network residence flow in the second cell.

an eighth processing module, configured to determine whether a target cell that can reside exists on the first frequency band if the first frequency band exists on the first frequency band;

a ninth processing module, configured to perform frequency point search in the first frequency band if no target cell that can reside exists on the first frequency point, and determine a second cell;

and a tenth processing module, configured to, if a target cell that can reside exists on the first frequency point, perform a network-residing process on the target cell that can reside.

an eleventh processing module, configured to obtain a voltage or a temperature of the NB-IoT communication device after the NB-IoT communication device is booted/waked up by sleep;

the twelfth processing module is used for sending early warning information to the cloud when the voltage or the temperature exceeds a first threshold range;

a thirteenth processing module for determining whether the voltage or the temperature is in a second threshold range when the voltage or the temperature is below the first threshold range; the second threshold range is less than the first threshold range;

A fourteenth processing module configured to re-perform the step of acquiring a voltage or a temperature of the NB-IoT communication device when determining that the NB-IoT communication device enters a connected state when in the second threshold range.

The implementation embodiments of the network residence control method of the narrowband internet of things communication device are applicable to the embodiments of the network residence control device of the narrowband internet of things communication device, and the same technical effects can be achieved, so that repetition is avoided, and detailed description is omitted.

As shown in fig. 8, an embodiment of the present application provides an electronic device including a transceiver 810, a processor 800, a memory 820, and a program or instructions stored on the memory 820 and executable on the processor 800; the processor 800 implements the above-described network residence control method applied to the narrowband internet of things communication device when executing the program or the instructions.

The transceiver 810 is configured to receive and transmit data under the control of the processor 800.

Wherein in fig. 8, a bus architecture may comprise any number of interconnected buses and bridges, and in particular, one or more processors represented by processor 800 and various circuits of memory represented by memory 820, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 810 may be a number of elements, i.e., including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The interface may also be an interface capable of interfacing with an internal connection requiring device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 may store data used by the processor 800 in performing operations.

The readable storage medium of the embodiment of the present application stores a program or an instruction, where the program or the instruction, when executed by a processor, implements the steps in the network residence control method of the narrowband internet of things communication device as described above, and can achieve the same technical effects, so that repetition is avoided, and no redundant description is provided herein.

The processor is a processor in the network residence control method of the narrowband internet of things communication device described in the above embodiment. The readable storage medium includes a computer readable storage medium such as a Read-Only Memory (ROM), a random access Memory (Random Access Memory RAM), a magnetic disk or an optical disk.

It is further noted that the electronic devices described in this specification include, but are not limited to, smartphones, tablets, etc., and that many of the functional components described are referred to as modules in order to more particularly emphasize their implementation independence.

In the present embodiment, the modules may be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be organized as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different bits which, when joined logically together, comprise the module and achieve the stated purpose for the module.

Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Likewise, operational data may be identified within modules and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices.

Where a module may be implemented in software, taking into account the level of existing hardware technology, a module may be implemented in software, and one skilled in the art may, without regard to cost, build corresponding hardware circuitry, including conventional Very Large Scale Integration (VLSI) circuits or gate arrays, and existing semiconductors such as logic chips, transistors, or other discrete components, to achieve the corresponding functions. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.

The exemplary embodiments described above are described with reference to the drawings, many different forms and embodiments are possible without departing from the spirit and teachings of the present application, and therefore, the present application should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will convey the scope of the disclosure to those skilled in the art. In the drawings, the size of the elements and relative sizes may be exaggerated for clarity. The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Unless otherwise indicated, a range of values includes the upper and lower limits of the range and any subranges therebetween.

While the foregoing is directed to the preferred embodiments of the present application, it should be noted that modifications and adaptations to those embodiments may occur to one skilled in the art and that such modifications and adaptations are intended to be comprehended within the scope of the present application without departing from the principles set forth herein.

Claims

1. The network residence control method of the narrowband internet of things communication equipment is characterized by comprising the following steps of:

2. The method of claim 1, wherein before the narrowband internet of things NB-IoT communication device completes the network-resident flow, the method further comprises:

3. The method of claim 1, wherein after the NB-IoT communication device completes the network-resident flow, the NB-IoT communication device further comprises performing low power control in at least one of the following ways:

Using a low power mode;

4. The method of claim 3, wherein dynamically configuring a low power consumption mode or powering off a power module of the NB-IoT communication device comprises:

5. The method of claim 4, wherein dynamically configuring a low power consumption mode or powering off a power module of the NB-IoT communication device based on the transmission result comprises:

6. The method according to claim 4, wherein the method further comprises:

7. The method of claim 1, wherein before the narrowband internet of things NB-IoT communication device completes the network-resident flow, the method further comprises:

and carrying out network residence flow in the second cell.

8. The method of claim 7, wherein the method further comprises:

9. The method according to claim 1, wherein the method further comprises:

10. The utility model provides a network control device resides of narrowband thing networking communication equipment which characterized in that includes:

11. An electronic device, comprising: a transceiver, a processor, a memory, and a program or instructions stored on the memory and executable on the processor; the method for controlling the network residence of the narrowband internet of things communication device according to any one of claims 1-9 is realized when the processor executes the program or the instructions.

12. A readable storage medium having stored thereon a program or instructions, which when executed by a processor, implements the steps in a network residence control method of a narrowband internet of things communication device according to any one of claims 1-9.