CN111818554A

CN111818554A - Method for improving remote upgrade success rate of large-scale NB-IoT terminal

Info

Publication number: CN111818554A
Application number: CN202010629976.0A
Authority: CN
Inventors: 陈科明; 郑杭明
Original assignee: Hangzhou Dianzi University
Current assignee: Hangzhou Dianzi University
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2020-10-23
Anticipated expiration: 2040-07-03
Also published as: CN111818554B

Abstract

The invention discloses a method for improving the success rate of remote upgrade of a large-scale NB-IoT terminal. The cloud server performs information acquisition on NB terminal equipment to be updated in a time-sharing manner, and divides the updated NB terminal equipment into a set Cx of different base stations corresponding to subordinate NB terminal equipment according to the obtained NB terminal equipment information. The set Cx is then further sorted down into N1, N2, N3 subsequences. And solving a corresponding signal mean value of the sequence, and estimating the concurrency capacity of the base station according to the signal mean value. And carrying out remote upgrade on the signal with high priority in the sequence. According to the invention, under the condition of not changing the hardware of the equipment, the position information and the signal environment of the NB terminal are collected and analyzed, the concurrency capacity of the base station is estimated, and the NB terminal to be upgraded is upgraded in batches and remotely according to the estimated concurrency capacity of the base station and the signal priority, so that the success rate of remote upgrade of the large-scale NB-IoT terminal is improved, and the time consumption is reduced.

Description

Method for improving remote upgrade success rate of large-scale NB-IoT terminal

Technical Field

The invention relates to the technical field of Internet of things and Internet, in particular to a method for improving the success rate of remote upgrading of a large-scale NBIOT terminal.

Background

The narrow-band Internet of things (NB-IoT) is a cellular communication system with low cost, large capacity, low power consumption and wide coverage, is constructed in a cellular network, only consumes about 180KHz of bandwidth, uses a License frequency band, can adopt three deployment modes such as in-band deployment, guard band deployment or independent carrier deployment and the like, coexists with the existing network, and can be directly deployed in a GSM network, a UMTS network or an LTE network so as to reduce the deployment cost and realize smooth upgrade.

With the continuous popularization of the NB-IoT technology, more and more terminal devices of the Internet of things adopt the NB-IoT technology as a communication mode to be connected with a cloud server. The terminal equipment of the internet of things generally needs regular maintenance and updating, and the code updating of the terminal equipment of the internet of things generally needs to be completed through multiple interactive communication with the cloud server, so that the remote upgrading of the terminal needs to occupy more communication time compared with the common instruction communication. Due to the narrowband characteristics of NB-IoT technology, the uplink and downlink bands are narrow, and thus cannot allow concurrent communication between larger devices. Therefore, when large-scale NB-IoT terminals are remotely upgraded simultaneously, there is often a problem of low success rate and long time consumption.

Disclosure of Invention

The invention provides a method for improving the success rate of remote upgrade of a large-scale NB-IoT terminal, aiming at improving the success rate of remote upgrade of the NB-IoT terminal and reducing time consumption on the premise of not changing the hardware and the deployment position of the terminal equipment.

The method comprises the following steps: and the cloud server performs information acquisition on the NB terminal equipment needing to be upgraded in a time-sharing manner, wherein the information acquisition comprises cellid, rsrp and sinr information of the terminal.

Step two: according to the obtained base station cell number (cellid) of the NB terminal equipment and the base station cell number and base station association information provided by an operator, the NB terminal equipment needing to be upgraded is classified into sets C1, C2 and C3. corresponding to different base stations and subordinate NB terminal equipment.

Step three: and on the premise of obtaining a set Cx of the base station corresponding to the subordinate NB terminal equipment in the step two, performing signal priority ordering on the set Cx according to rsrp and sinr information of the subordinate NB terminal equipment.

Step four: and according to the requirement of Chinese mobile test in the LTE network and in combination with actual requirements, the set Cx in the step three is further classified into sequences of N1, N2 and N3.

Step five: and solving a corresponding signal mean value Nxa of the Nx sequence obtained in the fourth step, and estimating the concurrent capacity Tx of the base station according to the signal mean value Nxa. And (4) carrying out remote upgrade on Tx devices with high signal priority in the Nx sequence, and after upgrading of a certain device in the Tx devices in the queue to be upgraded is completed, sequentially carrying out remote upgrade on the remaining devices selected from the Nx sequence. The sequence of the sequences of N1, N2 and N3 in the set Cx is remotely upgraded in turn according to the steps, and the above processes are simultaneously executed for each set Cx.

Step six: and after 95 percent of the devices in the set Cx are upgraded remotely, performing overtime processing on the rest remote upgrade overtime devices. The cloud server performs classification judgment on the remote upgrade overtime equipment and performs corresponding subsequent processing by inquiring the equipment information of the upgrade overtime equipment, the rsrp information and the sinr information. And after finishing the processing of the rest remote upgrading overtime equipment, finishing the remote upgrading task of the NB terminal.

The invention has the beneficial effects that: under the condition of not changing the hardware of the equipment, the invention improves the success rate of the remote upgrade of the large-scale NB-IoT terminal and reduces the time consumption by acquiring and analyzing the position information and the signal environment of the NB terminal, dividing the base station to which the terminal belongs and pre-estimating the concurrent capacity of the base station, remotely upgrading the NB terminal needing to be upgraded in batches according to the pre-estimated concurrent capacity of the base station and the signal priority and overtime processing the upgrade overtime equipment.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 shows an overall flow chart.

Fig. 2 shows a schematic diagram of the division of NB terminal devices with base station cells and base stations.

Fig. 3 shows a communication flow of remote upgrade of NB terminal devices by a cloud server.

Fig. 4 shows a flow chart of dynamic allocation of the cloud server to the remote upgrade device.

Fig. 5 shows a flow chart of cloud server processing for a remote upgrade timeout device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 shows an overall flowchart, and a flow of a method for improving a success rate of remote upgrade of a large-scale NB-IoT terminal includes, first, performing information acquisition on NB terminal devices to be updated in a time-sharing manner, where the information acquisition includes cellid, rsrp, and sinr information of the terminal. Secondly, according to the obtained base station cell number (cellid) of the NB terminal device and the base station cell number and base station association information provided by the operator, the NB terminal device to be updated is classified into sets C1, C2 and C3. of different base stations corresponding to subordinate NB terminal devices.

NB-IoT is a communication technology based on LTE network architecture. RSRP (Reference Signal receiving power) is one of the key parameters that can represent the wireless Signal strength in an LTE network and the physical layer measurement requirements, and is the average of the received Signal power over all REs (resource elements) that carry Reference signals within a certain symbol. SINR: the Signal to Interference plus Noise Ratio (Signal to Interference plus Noise Ratio) is the Ratio of the received strength of the useful Signal to the received strength of the interfering Signal (Noise and Interference); therefore, according to the rsrp and sinr information of the acquired terminal and the requirement of the China Mobile test, the equipment set Cx corresponding to different base stations can be subdivided into sequences of N1, N2 and N3.

And (3) predicting corresponding base station concurrency capacity Tx according to the signal mean values of the N1, N2 and N3 sequences, and then combining the Nx sequences and Tx dynamic allocation upgrading equipment sequences by the cloud server to remotely upgrade the set Cx according to the sequences of N1, N2 and N3.

And after 95 percent of the devices in the set Cx are upgraded remotely, performing overtime processing on the rest remote upgrade overtime devices. The cloud server performs classification judgment on the remote upgrade overtime equipment and performs corresponding subsequent processing by inquiring the equipment information of the upgrade overtime equipment, the rsrp information and the sinr information. Because the influence between the communications of NB terminal equipment of different base stations is relatively less, all sets Cx to be upgraded are remotely upgraded simultaneously, and after all sets Cx finish the upgrading process, the remote upgrading task of the NB terminal is finished.

Fig. 2 shows a schematic diagram of the division of NB terminal devices into base station cells and base stations, where cellid (global Cell identity) is used to identify the area covered by one Cell (base station/one sector Cell).

MCC + MNC + ENODEB _ ID + CID in the LTE network, where MCC: a mobile country code; MNC is mobile network code; CID: a cell identification code; ENODEB _ ID: an eNodeB identification code. And dividing the obtained NB terminal equipment into different base station cells A1, A2, A3, B1, B2 and B3 according to the obtained base station cell number (cellid). And correspondingly, different base stations A and B can be divided according to decoding information provided by a combined operator, and different base station cells A1, A2 and A3 correspond to the base station A and base station cells B1, B2 and B3 correspond to the base station B.

Table 1 shows a schematic diagram of china mobile test requirements in an LTE network, and NB-IoT is a communication technology based on an LTE network architecture, so that the china mobile test requirements can be adopted. In order to simplify the model and improve the efficiency, the extreme good point (RSRP > -85 dBm; SINR >25), the good point (RSRP ═ 85 to-95 dBm; SINR:16-25) in the case of the coverage strength are used as the signal strength condition of the remote upgrade device sequence N1, the middle point (RSRP ═ 95 to-105 dBm; SINR:11-15) and the difference point (RSRP ═ 105 to-115 dBm; SINR:3-10) in the case of the coverage strength are used as the signal strength condition of the remote upgrade device sequence N2, and the extreme difference point (RSRP < -115 dBm; SINR <3) in the case of the coverage strength are used as the signal strength condition of the remote upgrade device sequence N3.

TABLE 1

Fig. 3 shows a communication flow of remote upgrade of NB terminal devices by a cloud server. The method comprises the following specific steps:

the method comprises the following steps: and the cloud server issues an instruction to inquire the current version number of the NB terminal equipment.

Step two: and the NB terminal equipment replies the current version number of the cloud server, and the cloud server receives the verification and then issues the remote upgrade version information.

Step three: and after the NB terminal equipment confirms the remote upgrading version information, requesting a remote upgrading data packet from the cloud server. And the cloud server replies corresponding remote upgrading data packets after receiving the data packets, and repeats the steps until all the data packets are successfully received.

Step four: and then the equipment sends a remote upgrade success instruction to the cloud server and restarts the equipment. After the equipment is remotely upgraded and restarted to send the initial information, the cloud server confirms that the NB terminal equipment completes remote upgrading.

Fig. 4 shows a flow chart of dynamic allocation of the cloud server to the remote upgrade device, which includes the following processes:

and solving a corresponding signal mean value N1a from the N1 sequence in the NB terminal equipment set Cx to be updated, and predicting the concurrency capacity T1 of the base station according to the signal mean value N1 a. The method comprises the steps of carrying out remote upgrade on T1 NB terminal devices with high signal strength priority in an N1 sequence, and carrying out remote upgrade on residual devices sequentially selected from an N1 sequence after upgrading of part of T1 devices in a queue to be upgraded is completed. And when all the devices in the N1 sequence enter remote upgrade and only 0.1 × T1 residual NB terminal devices do not finish remote upgrade, adding the devices in the N2 sequence according to the N1 step, namely, not waiting until all the devices in the N1 sequence finish remote upgrade, so as to accelerate the overall remote upgrade progress. Similarly, the N3 sequence is executed correspondingly, and when only 0.05 × T3 NB terminal devices remain in the total N1+ N2+ N3 device and the remote upgrade is not completed, the remaining remote upgrade timeout device is subjected to timeout processing.

Fig. 5 shows a flow chart of processing the remote upgrade timeout device by the cloud server, which includes the following specific processes:

firstly, the cloud server queries the version number, sinr and rsrp information of the equipment by issuing an instruction to the equipment with overtime remote upgrade. The specific query results and processing procedures can be divided into the following four types:

and if the queried version number of the device is the same as the remote upgrade version number, the device is the latest version and does not need to be updated.

And type 2, if the queried equipment version number is different from the remote upgrade version number and the signal environments corresponding to sinr and rsrp of the equipment are extremely poor, the equipment is indicated to be in an environment which cannot finish remote upgrade.

And type 3, if the queried equipment version number is different from the remote upgrade version number and the signal environments corresponding to sinr and rsrp of the equipment are normal, the equipment is indicated to be abnormal and needs to be processed subsequently.

And 4, if the types do not conform to the three types, judging that the equipment is in an unknown condition and needing subsequent treatment.

Claims

1. A method for improving the success rate of remote upgrade of large-scale NB-IoT terminals is characterized in that: the method comprises the following steps:

the method comprises the following steps: the cloud server carries out information acquisition on NB terminal equipment needing to be updated in a time-sharing mode, wherein the information acquisition comprises cellid, rsrp and sinr information of the terminal;

step two: and classifying the NB terminal equipment needing to be updated into sets C1, C2 and C3. corresponding to different base stations and subordinate NB terminal equipment according to the obtained base station cell number of the NB terminal equipment and the base station cell number and base station association information provided by an operator.

Step three: on the premise of obtaining a set Cx of the base station corresponding to the subordinate NB terminal equipment in the step two, carrying out signal priority sequencing on the set Cx according to rsrp and sinr information of the subordinate NB terminal equipment;

step four: according to the requirements of China Mobile testing and in combination with actual requirements, the set Cx in the third step is further classified downwards into sequences of N1, N2 and N3;

step five: solving a corresponding signal mean value Nxa of the Nx sequence obtained in the fourth step, and predicting the concurrent capacity Tx of the base station according to the signal mean value Nxa; the method comprises the steps that Tx devices with high signal priority in an Nx sequence are remotely upgraded, and after upgrading of a certain device in Tx devices in a queue to be upgraded is completed, the remaining devices selected from the Nx sequence are remotely upgraded in sequence; the sequence of the sequences of N1, N2 and N3 in the set Cx is remotely upgraded in turn, and the above processes are simultaneously executed for each set Cx;

step six: after 95% of the devices in the Cx set are upgraded remotely, performing overtime processing on the rest remote upgrade overtime devices; the cloud server judges the remote upgrade overtime equipment in a classified manner and performs corresponding subsequent processing by inquiring the equipment information of the upgrade overtime equipment, the rsrp information and the sinr information; and after finishing the processing of the rest remote upgrading overtime equipment, finishing the remote upgrading task of the NB terminal.

2. The method of claim 1, wherein the method for improving the success rate of the large-scale NB-IoT remote upgrade comprises: the classification conditions in the fourth step are as follows:

the receiving power of the reference signal is more than or equal to-95 dBm, and the signal-to-interference-plus-noise ratio is more than or equal to 16, which are used as the signal intensity condition of the remote upgrading equipment sequence N1;

the signal strength condition of the remote upgrading equipment sequence N2 is that the reference signal receiving power is between-95 dBm and-105 dBm, and the signal to interference plus noise ratio is between 15 and 3;

the signal strength condition of the remote upgrading equipment sequence N3 is that the reference signal receiving power is less than or equal to-105 dBm and the signal to interference plus noise ratio is less than or equal to 3.

3. The method of claim 1, wherein the method for improving the success rate of the large-scale NB-IoT remote upgrade comprises: the timeout processing of the upgrade timeout device in the sixth step is specifically: the cloud server queries the version number of the equipment, the reference signal receiving power and the signal-to-interference-plus-noise ratio by issuing an instruction to the equipment with overtime remote upgrade; the specific query results and processing procedures are divided into the following four types:

type 1, if the queried version number of the device is the same as the remote upgrade version number, it means that the device is the latest version and does not need to be updated;

type 2, if the queried version number of the device is different from the version number of the remote upgrade, and the reference signal receiving power and the signal-to-interference-plus-noise ratio of the device correspond to a very poor signal environment, it indicates that the device cannot complete the remote upgrade in the environment;

type 3, if the queried version number of the device is different from the remote upgrade version number, and the signal environment corresponding to the reference signal receiving power and the signal-to-interference-plus-noise ratio of the device is normal, it indicates that the device is abnormal and needs to be processed subsequently;