CN111601368B - NB-IoT fixed terminal and vehicle-mounted mobile NB-IoT system - Google Patents

NB-IoT fixed terminal and vehicle-mounted mobile NB-IoT system Download PDF

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CN111601368B
CN111601368B CN202010584339.6A CN202010584339A CN111601368B CN 111601368 B CN111601368 B CN 111601368B CN 202010584339 A CN202010584339 A CN 202010584339A CN 111601368 B CN111601368 B CN 111601368B
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iot
fixed terminal
base station
mobile
tau
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CN111601368A (en
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钟永锋
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Xinwu Tianjin Technology Co ltd
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Xinwu Tianjin Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/48—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for in-vehicle communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Computer Networks & Wireless Communication (AREA)
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  • Medical Informatics (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

NB-IoT fixed terminal, vehicle-mounted mobile NB-IoT system, including: the NB-IoT fixed terminal determines the coverage grade, does not attach the base station with the low coverage grade and waits for the mobile NB-IoT base station when the coverage grade is low; and the NB-IoT mobile base station establishes connection with the NB-IoT fixed terminal and negotiates TAU time, and when the connection with the NB-IoT fixed terminal is not successfully established, the identity of the NB-IoT mobile terminal is changed into the identity of the NB-IoT fixed terminal. In the application, the NB-IoT fixed terminal is not attached to the base station with the low coverage grade, so that excessive power consumption under the low coverage grade is avoided; and when the NB-IoT mobile base station does not successfully establish the connection with the NB-IoT fixed terminal, the NB-IoT mobile terminal changes the identity of the NB-IoT fixed terminal and accesses the network so as to maintain the registration of the NB-IoT fixed terminal in the core network.

Description

NB-IoT fixed terminal and vehicle-mounted mobile NB-IoT system
Technical Field
The application relates to a wireless communication technology, in particular to an NB-IoT terminal and a vehicle-mounted mobile NB-IoT system.
Background
The mobile communication is moving from the connection of people and people to the connection of people and things, and the NB-IoT based on the cellular network technology occupies a bandwidth of 180kHz and can be directly deployed in a GSM network, a UMTS network or an LTE network, so that the deployment cost is reduced and smooth upgrading is realized. Three major operators in china deploy NB-IoT networks in large quantities, based on the already developed internet of things services.
Fig. 1 shows a schematic diagram of NB-IoT terminal coverage.
As shown, the coverage area may be roughly divided into coverage levels coverage level 0, coverage level 1 and coverage level 2.
Although the NB-IoT terminal can operate at a low coverage level (e.g., coverage level 1 or coverage level 2) (narrowband transmission increases power spectral density, and repeatedly transmits and receives for a long time), power consumption is significantly increased, so that the NB-IoT terminal device has a non-uniform battery life, and the network device maintenance cost is increased.
Problems existing in the prior art:
NB-IoT terminals need to reduce power consumption as much as possible.
Disclosure of Invention
The embodiment of the application provides an NB-IoT fixed terminal, a vehicle-mounted mobile NB-IoT base station system and a processing method thereof, so as to solve the technical problems.
According to a first aspect of embodiments herein, there is provided an NB-IoT fixed terminal, including:
the level determining module is used for determining the current coverage level according to the quality of the downlink synchronous signal;
and the processing module is used for not attaching the base station with the low coverage grade and selecting TAU time in a pre-stored tracking area updating TAU sequence when the current coverage grade is determined to be the low coverage grade, and waiting for the NB-IoT mobile base station in the TAU time.
According to a second aspect of embodiments of the present application, there is provided an in-vehicle mobile NB-IoT system, comprising:
the NB-IoT mobile base station is used for establishing connection with the NB-IoT fixed terminal and negotiating tracking area update TAU time;
and the NB-IoT mobile terminal is used for changing the identity of the NB-IoT mobile terminal into the identity of the NB-IoT fixed terminal when the NB-IoT mobile base station does not establish connection with the NB-IoT fixed terminal at the TAU time.
According to a third aspect of the embodiments of the present application, there is provided a data processing method for an NB-IoT fixed terminal, including:
determining the current coverage grade according to the quality of the downlink synchronous signal;
and when the current coverage grade is determined to be a low coverage grade, not attaching the base station with the low coverage grade, selecting TAU time in a pre-stored tracking area updating TAU sequence, and waiting for the NB-IoT mobile base station in the TAU time.
According to a fourth aspect of embodiments of the present application, there is provided a data processing method for a vehicular mobile NB-IoT system, including:
negotiating a tracking area update TAU time with an NB-IoT fixed terminal;
when the NB-IoT mobile base station does not establish connection with the NB-IoT fixed terminal at the TAU time, changing the identification of the NB-IoT mobile terminal into the identification of the NB-IoT fixed terminal.
According to a fifth aspect of embodiments herein, there is provided a computer storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the data processing method of the NB-IoT fixed terminal as described above.
According to a sixth aspect of embodiments herein, there is provided a computer storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the data processing method of the vehicular mobile NB-IoT system as described above.
According to a seventh aspect of embodiments herein, there is provided an electronic device comprising one or more processors, and memory for storing one or more programs; the one or more programs, when executed by the one or more processors, implement the steps of the data processing method of the NB-IoT fixed terminal as described above.
According to an eighth aspect of embodiments herein, there is provided an electronic device comprising one or more processors, and memory for storing one or more programs; the one or more programs, when executed by the one or more processors, implement the steps of the data processing method of the vehicular mobile NB-IoT system as described above.
By adopting the NB-IoT fixed terminal, the vehicle-mounted mobile NB-IoT system and the data processing method thereof, the NB-IoT fixed terminal firstly determines the current coverage grade, does not attach to the base station of the coverage grade under the low coverage grade and waits for the NB-IoT mobile base station, thereby avoiding the problem that the NB-IoT fixed terminal consumes too much power during operation under the low coverage grade; the NB-IoT mobile base station changes the identity of the NB-IoT mobile terminal to the identity of the NB-IoT fixed terminal when the connection with the NB-IoT fixed terminal is not established within the TAU time so as to maintain the registration of the NB-IoT fixed terminal in a core network.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 shows a schematic diagram of NB-IoT fixed terminal coverage;
FIG. 2 shows a schematic diagram of the process of entering and exiting a PSM;
fig. 3 shows a schematic structural diagram of an NB-IoT fixed terminal in the first embodiment of the present application;
fig. 4 shows a schematic structural diagram of a mobile NB-IoT system mounted on a vehicle in an embodiment two of the present application;
fig. 5 is a flowchart illustrating an implementation of a data processing method for an NB-IoT fixed terminal in the third embodiment of the present application;
fig. 6 is a flowchart illustrating an implementation of a data processing method of an NB-IoT mobile base station in the fourth embodiment of the present application;
fig. 7 shows a schematic structural diagram of an electronic device in a seventh embodiment of the present application;
fig. 8 shows a schematic structural diagram of an electronic device in an eighth embodiment of the present application;
fig. 9 is a schematic diagram illustrating a usage scenario of an NB-IoT terminal and a base station in an embodiment nine of the present application.
Detailed Description
In the process of implementing the present application, the inventors found that:
the 3GPP standard specifies a fixed PSM Mode (Power Saving Mode) of an NB-IoT terminal (UE), in which the terminal does not monitor paging but is still registered in the network, and does not need to reconnect or establish a PDN (packet data network) connection when data is to be transmitted.
Figure 2 shows a schematic diagram of the process of entering and exiting PSM.
As shown in the figure, after the UE processes the data, the RRC (Radio Resource Control) connection is released, enters an idle state and a Discontinuous Reception (DRX) state, and at the same time, starts a DRX Timer Active Timer T3324, and the Timer Active Timer (T3324, 0-255 seconds) determines when to enter the PSM mode, and after the Timer T3324 times out, the UE enters the PSM mode;
in the PSM mode, when a TAU (Tracking Area Update) period request timer T3412 times out or the UE has MO (Mobile originating) service to process, the UE exits the PSM mode, enters an idle state and then enters a connected state to process uplink and downlink services. The TAU period request timer T3412 is specified by the network side in ATTACH and TAU messages, and the 3GPP standard specifies that 54 minutes are default, and the maximum time can be 310 hours.
In order to solve the problems in the prior art, embodiments of the present application provide an NB-IoT fixed terminal, a vehicle-mounted mobile NB-IoT system, a data processing method thereof, and a computer storage medium.
The NB-IoT fixed terminal in the present application is relative to the NB-IoT mobile terminal in the vehicular mobile NB-IoT system, and is not limited to a terminal fixed at a certain position.
The scheme in the embodiment of the application can be implemented by adopting various computer languages, such as object-oriented programming language Java and transliterated scripting language JavaScript.
In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the following description of the exemplary embodiments of the present application with reference to the accompanying drawings is made in further detail, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all the embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Example one
Fig. 3 shows a schematic structural diagram of an NB-IoT fixed terminal in the first embodiment of the present application.
As shown, the NB-IoT fixed terminal includes:
a level determining module 301, configured to determine a current coverage level according to the quality of the downlink synchronization signal;
a processing module 302, configured to, when it is determined that the current coverage level is a low coverage level, detach the base station with the low coverage level and select a TAU time from a pre-stored tracking area update TAU sequence, and wait for the NB-IoT mobile base station within the TAU time.
In specific implementation, the coverage level may be divided by using an existing standard division manner (divided into three coverage levels, i.e., coverage levels 0, 1, and 2, each coverage level having a corresponding coverage range), or may be divided by using another division manner, which is not limited in this application.
The base station with the low coverage level can be a fixed base station and can also be an NB-IoT mobile base station.
The NB-IoT fixed terminal may pre-store a TAU sequence, which may include one or more values, each value representing TAU time, each value may be the same or different.
The waiting for the NB-IoT mobile base station within the TAU time may include: when the TAU time does not end/does not reach the wakeup time, the NB-IoT fixed terminal may continuously or discontinuously determine its own coverage level, and may also actively search for other NB-IoT mobile base stations to determine whether its own coverage level is improved.
By adopting the NB-IoT fixed terminal provided in the embodiment of the present application, the NB-IoT fixed terminal first determines the current coverage class, does not attach to the base station of the coverage class in the low coverage class and waits for the NB-IoT mobile base station, thereby avoiding the problem that the NB-IoT fixed terminal consumes too much power during operation in the low coverage class.
In an embodiment, the level determining module is specifically configured to determine that the current coverage level is a low coverage level when the received signal strength is less than a preset signal strength threshold.
In a specific implementation, the coverage level may be determined according to the quality of the downlink synchronization signal received by the NB-IoT fixed terminal, and specifically, the coverage level may be determined according to the received signal strength and a preset signal strength threshold.
When the received signal strength is smaller than a preset signal strength threshold value, determining that the current coverage grade is a low coverage grade and not attaching to the base station; and when the received signal strength is greater than a preset signal strength threshold value, determining that the current coverage grade is a high coverage grade, and attaching the base station.
In specific implementation, the current channel quality can be known by measuring the broadcast signal sent by the base station; or the connection can be established first and then the channel quality can be measured accurately.
In an embodiment, the processing module is further configured to complete the attachment to the NB-IoT mobile base station at the TAU wakeup time, establish a connection with the NB-IoT mobile base station, perform clock synchronization, and determine the next TAU time according to the clock time attached to the NB-IoT mobile base station.
In the embodiment of the application, the NB-IoT fixed terminal may maintain a clock module in advance, and after attaching to the NB-IoT mobile base station, may perform clock synchronization with the NB-IoT mobile base station.
The determination of the TAU time for establishing the connection next time according to the clock time attached to the NB-IoT mobile base station may be determined according to specific requirements, for example: every 24 hours, or once a week, etc.
In an embodiment, the processing module is further configured to continue waiting for the NB-IoT mobile base station for a next TAU time selected from the TAU sequence when the TAU wakeup time does not complete the attachment with the NB-IoT mobile base station.
In specific implementation, the selection of the next TAU time from the TAU sequence may be performed according to a preset rule or algorithm, or may be performed randomly.
In an embodiment, the processing module is further configured to wait until the next TAU time wake-up time to complete the attachment and data transmission with the NB-IoT mobile base station when the NB-IoT fixed terminal has MO traffic initiated by the terminal.
In the embodiment of the application, in order to reduce the power consumption of the NB-IoT fixed terminal at a low coverage level, before the NB-IoT mobile base station is not connected, even if there is an MO service, data transmission is not performed until the next TAU time wakeup time completes the attachment with the NB-IoT mobile base station, and then data transmission is performed.
Example two
Based on the same inventive concept, the embodiment of the present application provides a vehicle-mounted mobile NB-IoT system, which is described below.
Fig. 4 shows a schematic structural diagram of an NB-IoT mobile system in the second embodiment of the present application.
As shown, the NB-IoT mobile system includes:
an NB-IoT mobile base station 401 configured to establish a connection with an NB-IoT fixed terminal, negotiate and track area update TAU time;
an NB-IoT mobile terminal 402 configured to change the identity of the NB-IoT mobile terminal to the identity of the NB-IoT fixed terminal when the NB-IoT mobile base station does not successfully establish a connection with the NB-IoT fixed terminal at the TAU time.
By adopting the vehicular mobile NB-IoT system provided by the embodiment of the application, when the mobile NB-IoT mobile base station does not establish connection with the NB-IoT fixed terminal within TAU time, the identity of the NB-IoT mobile terminal is changed into the identity of the NB-IoT fixed terminal so as to maintain the registration of the NB-IoT fixed terminal in a core network.
In one embodiment, the system may further comprise:
a storage module, configured to store the identification information and TAU information of the attached NB-IoT fixed terminal.
In one embodiment, the NB-IoT mobile base station is further configured to synchronize time with the NB-IoT fixed terminal when establishing a connection with the NB-IoT terminal.
In particular, the NB-IoT mobile base station may maintain a clock module, and perform time synchronization with the NB-IoT fixed terminal after establishing a connection with the NB-IoT fixed terminal.
Specifically, the clock module may be implemented by software or hardware, which is not limited in this application.
In one embodiment, the NB-IoT mobile base station is further configured to configure the TAU sequence of the NB-IoT fixed terminal.
In particular implementation, the NB-IoT mobile base station may be further configured to configure the TAU sequence of the NB-IoT fixed terminal. Specifically, the NB-IoT mobile base station may send the reconfigured TAU sequence to the NB-IoT fixed terminal, and the NB-IoT fixed terminal stores and replaces the current TAU sequence after receiving the reconfigured TAU sequence.
In one embodiment, the NB-IoT mobile terminal includes an eSIM card, and the NB-IoT mobile terminal is specifically configured to change the identity of the NB-IoT mobile terminal to the identity of the NB-IoT fixed terminal through an eSIM protocol when the NB-IoT mobile base station does not establish a connection with the NB-IoT fixed terminal at the TAU time.
EXAMPLE III
Based on the same inventive concept, the embodiment of the present application further provides a data processing method for the NB-IoT fixed terminal, and the principle of the method for solving the problem is similar to that of the NB-IoT fixed terminal in the first embodiment, and repeated parts are not described again.
Fig. 5 is a flowchart illustrating an implementation of a data processing method for an NB-IoT fixed terminal in the third embodiment of the present application.
As shown in the figure, the data processing method of the NB-IoT fixed terminal includes:
step 501, determining the current coverage grade according to the quality of the downlink synchronous signal;
step 502, when determining that the current coverage grade is a low coverage grade, not attaching the base station with the low coverage grade, selecting TAU time from a pre-stored tracking area update TAU sequence, and waiting for an NB-IoT mobile base station within the TAU time.
By adopting the data processing method of the NB-IoT fixed terminal provided by the embodiment of the application, the NB-IoT fixed terminal firstly determines the current coverage grade, does not attach the base station of the coverage grade under the low coverage grade and waits for moving the NB-IoT base station, so that the problem that the NB-IoT terminal consumes too much power when working under the low coverage grade is avoided.
In one embodiment, the determining that the current coverage level is a low coverage level includes:
and when the received signal strength is less than a preset signal strength threshold value, determining the current coverage level as a low coverage level.
In one embodiment, the method further comprises:
and when the pre-stored TAU awakening time is finished to be attached to the NB-IoT mobile base station, time synchronization is carried out between the mobile base station and the NB-IoT mobile base station, and the next TAU time is determined according to the clock time attached to the NB-IoT mobile base station.
In one embodiment, the method further comprises:
and when the pre-stored TAU awakening time does not finish the attachment with the NB-IoT mobile base station, continuing to wait for the NB-IoT mobile base station at the next TAU time selected from the TAU sequence.
In an embodiment, when the NB-IoT fixed terminal has MO traffic initiated by a terminal, the NB-IoT mobile base station completes attachment and data transmission by the next TAU time wakeup time.
Example four
Based on the same inventive concept, the embodiment of the present application further provides a data processing method for the NB-IoT mobile base station, and the principle of the method for solving the problem is similar to that of the NB-IoT mobile base station in the second embodiment, and repeated parts are not described again.
Fig. 6 shows a flowchart of an implementation of the data processing method of the mobile NB-IoT system on board in the fourth embodiment of the present application.
As shown in the figure, the data processing method of the NB-IoT mobile base station includes:
step 601, negotiating a tracking area update TAU time with an NB-IoT fixed terminal;
step 602, when the NB-IoT mobile base station does not successfully establish connection with the NB-IoT fixed terminal at the TAU time, changing the identity of the NB-IoT mobile terminal into the identity of the NB-IoT fixed terminal.
By adopting the data processing method of the vehicle-mounted mobile NB-IoT system provided by the embodiment of the application, when the NB-IoT mobile base station does not successfully establish connection with the NB-IoT fixed terminal within TAU time, the identity of the NB-IoT mobile terminal is changed into the identity of the NB-IoT fixed terminal so as to maintain the registration of the NB-IoT fixed terminal in a core network.
In one embodiment, the method further comprises:
and when the connection is established with the NB-IoT fixed terminal, performing clock synchronization with the NB-IoT fixed terminal.
In one embodiment, the method further comprises:
configuring a TAU sequence of the NB-IoT fixed terminal.
In one embodiment, the changing the identity of the NB-IoT mobile terminal to the identity of the NB-IoT fixed terminal when the TAU time does not establish a connection with the NB-IoT fixed terminal includes:
and when the TAU time is not successful in establishing connection with the NB-IoT fixed terminal, changing the identifier of the NB-IoT mobile terminal into the identifier of the NB-IoT fixed terminal through an eSIM protocol.
In one embodiment, the method further comprises:
and when the connection with the NB-IoT fixed terminal is not successfully established for a plurality of times within the TAU time, deleting the identification information and the TAU information of the NB-IoT mobile terminal from a storage.
EXAMPLE five
Based on the same inventive concept, embodiments of the present application further provide a computer storage medium, which is described below.
The computer storage medium has a computer program stored thereon, and the computer program, when executed by a processor, implements the steps of the data processing method of the NB-IoT fixed terminal according to the third embodiment.
With the computer storage medium provided in the embodiment of the present application, the NB-IoT fixed terminal first determines the current coverage level, does not attach the base station of the coverage level in the low coverage level, and waits for the NB-IoT mobile base station, thereby avoiding the problem that the NB-IoT fixed terminal consumes too much power when operating in the low coverage level.
EXAMPLE six
Based on the same inventive concept, embodiments of the present application further provide a computer storage medium, which is described below.
The computer storage medium has a computer program stored thereon, and the computer program when executed by a processor implements the steps of the data processing method of the vehicular mobile NB-IoT system according to embodiment four.
With the computer storage medium provided in the embodiment of the present application, the NB-IoT mobile base station changes the identity of the NB-IoT mobile terminal to the identity of the NB-IoT fixed terminal when the NB-IoT mobile base station does not establish a connection with the NB-IoT fixed terminal within the TAU time, so as to maintain the registration of the NB-IoT fixed terminal in the core network.
EXAMPLE seven
Based on the same inventive concept, the embodiment of the present application further provides an electronic device, which is described below.
Fig. 7 shows a schematic structural diagram of an electronic device in an embodiment of the present application.
As shown, the electronic device includes memory 701 for storing one or more programs, and one or more processors 702; the one or more programs, when executed by the one or more processors, implement the data processing method for the NB-IoT fixed terminal as described in embodiment three.
By adopting the electronic device provided in the embodiment of the application, the NB-IoT fixed terminal first determines the current coverage level, does not attach the base station of the coverage level in the low coverage level and waits for the NB-IoT mobile base station, thereby avoiding the problem that the NB-IoT fixed terminal consumes too much power when operating in the low coverage level.
Example eight
Based on the same inventive concept, the embodiment of the present application further provides an electronic device, which is described below.
Fig. 8 shows a schematic structural diagram of an electronic device in an eighth embodiment of the present application.
As shown, the electronic device includes memory 801 for storing one or more programs, and one or more processors 802; the one or more programs, when executed by the one or more processors, implement the data processing method for the vehicular mobile NB-IoT system as described in embodiment four.
By adopting the electronic device provided in the embodiment of the application, when the NB-IoT mobile T base station does not successfully establish connection with the NB-IoT fixed terminal within the TAU time, the identity of the NB-IoT mobile terminal is changed into the identity of the NB-IoT fixed terminal, so as to maintain the registration of the NB-IoT fixed terminal in the core network.
Example nine
In order to facilitate the implementation of the present application, the embodiments of the present application are described with a specific example.
Fig. 9 is a schematic diagram illustrating a usage scenario of an NB-IoT fixed terminal and a vehicular mobile NB-IoT system in the ninth embodiment of the present application.
In the embodiment of the application, the NB-IoT fixed terminal is assumed to judge whether the threshold value of the NB-IoT fixed terminal is set to be-70 dBm or not, and if the received signal strength is > -70dBm, the fixed base station or the NB-IoT mobile base station is attached; if the received signal strength is < -70dBm, then the fixed base station or NB-IoT mobile base station is not attached.
As shown, it is assumed that the NB-IoT fixed terminal is located in the coverage of coverage level 2 of the fixed base station, and at this time, the NB-IoT fixed terminal does not attach to the fixed base station and waits for the mobile NB-IoT system to be installed in a vehicle; when a vehicle-mounted mobile NB-IoT system comes near the NB-IoT fixed terminal, the NB-IoT fixed terminal judges that the coverage level is improved, and when the NB-IoT fixed terminal is determined to be in the coverage range of the coverage level 0 of the vehicle-mounted NB-IoT mobile base station, the NB-IoT fixed terminal is attached to the vehicle-mounted NB-IoT mobile base station to complete data transmission.
Considering that the in-vehicle NB-IoT mobile base station arrival time is not fixed, there may be large differences, requiring multiple alternative terminal TAU wake-up times of variable patterns.
The vehicle-mounted mobile NB-IoT system comprises an NB-IoT mobile base station, a storage module and a vehicle-mounted NB-IoT mobile terminal, wherein the NB-IoT mobile base station and the fixed NB-IoT terminal negotiate a TAU time window mode, synchronize a current clock of the NB-IoT fixed terminal, and determine and record a current TAU value; the vehicle-mounted NB-IoT mobile terminal comprises an eSIM card used for changing the identification of the vehicle-mounted NB-IoT mobile terminal.
The application layer of the NB-IoT fixed terminal may maintain a clock module and store a sequence of values of the TAU timer (i.e., TAU sequence), and the values in the sequence may be the same or different. The application layer of the NB-IoT fixed terminal can determine the next TAU time value according to the time instant of attaching to the NB-IoT mobile base station. And if the attachment with the NB-IoT mobile base station is not completed at the awakening moment of the current TAU time, refreshing the next TAU timer, taking the next numerical value in the TAU sequence as the TAU time, and continuously waiting for the coverage grade to be improved.
And during waiting, waiting for the next TAU awakening time even if the NB-IoT fixed terminal has MO traffic, and finishing the attachment and data transmission with the vehicular NB-IoT mobile base station.
The application layer of the in-vehicle NB-IoT mobile base station may initially identify itself as a non-realtime available in-vehicle NB-IoT mobile base station and maintain a clock module. And after the NB-IoT fixed terminal is attached, the clock module of the NB-IoT fixed terminal is synchronous with the clock module of the vehicle-mounted NB-Io mobile T base station. In addition, the vehicular NB-IoT mobile base station may also further configure the TAU sequence of the NB-IoT fixed terminal.
If the vehicle-mounted NB-IoT mobile base station fails to establish connection with the NB-IoT fixed terminal within the TAU time agreed/negotiated with the NB-IoT fixed terminal, the vehicle-mounted NB-IoT mobile base station changes the identity of the NB-IoT fixed terminal into the identity of the NB-IoT fixed terminal through an eSIM protocol so as to maintain the registration of the NB-IoT fixed terminal in a core network.
And if the vehicle-mounted NB-IoT mobile base station fails to establish connection with the NB-IoT fixed terminal for multiple times within the TAU time agreed/negotiated with the NB-IoT fixed terminal, deleting the TAU time information and the identification information of the NB-IoT fixed terminal from a storage.
In specific implementation, the clock module may be a software time or a hardware time, which is not limited in the present application.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (15)

1. A vehicular mobile NB-IoT system, comprising:
an NB-IoT mobile base station for establishing connection with the NB-IoT fixed terminal and negotiating tracking area update TAU time;
the NB-IoT fixed terminal comprises:
the level determining module is used for determining the current coverage level according to the quality of the downlink synchronous signal;
a processing module, configured to, when determining that a current coverage class is a low coverage class, detach the base station with the low coverage class and select TAU time from a pre-stored tracking area update TAU sequence, and wait for an NB-IoT mobile base station within the TAU time;
an NB-IoT mobile terminal, configured to change the identity of the NB-IoT mobile terminal to the identity of the NB-IoT fixed terminal when the TAU time does not establish a connection with the NB-IoT fixed terminal.
2. The vehicular mobile NB-IoT system in accordance with claim 1, wherein the tier determination module is further configured to determine the current coverage tier as a low coverage tier when the received signal strength is less than a predetermined signal strength threshold.
3. The vehicular mobile NB-IoT system of claim 1,
the processing module is further configured to, when the pre-stored TAU wakeup time completes attachment to the NB-IoT mobile base station, perform clock synchronization with the NB-IoT mobile base station and determine a next TAU time according to the clock time attached to the NB-IoT mobile base station.
4. The vehicular mobile NB-IoT system of claim 1,
the processing module is further configured to continue waiting for the NB-IoT mobile base station for a next TAU time selected from the TAU sequence when the pre-stored TAU wakeup time does not complete the attachment with the NB-IoT mobile base station.
5. The vehicular mobile NB-IoT system of claim 4, wherein,
the processing module is further configured to, when the NB-IoT fixed terminal has an MO service initiated by a terminal, wait until the next TAU time wakeup time to complete attachment and data transmission with the NB-IoT mobile base station.
6. The vehicular mobile NB-IoT system in accordance with claim 1, wherein NB-IoT mobile base station is further configured to synchronize the NB-IoT fixed terminal's clock timing when establishing a connection with the NB-IoT fixed terminal.
7. The vehicular mobile NB-IoT system in accordance with claim 1, wherein NB-IoT mobile base station is further configured to configure the TAU sequence of the NB-IoT fixed terminal.
8. The in-vehicle mobile NB-IoT system recited in claim 1, wherein the NB-IoT mobile terminal comprises an eSIM card, and wherein the NB-IoT mobile terminal is further configured to change the identity of the NB-IoT mobile terminal to the identity of the NB-IoT fixed terminal via an eSIM protocol when the NB-IoT mobile base station is not successfully connected to the NB-IoT fixed terminal at the TAU time.
9. A data processing method based on the vehicular mobile NB-IoT system in any one of claims 1-8, characterized by comprising:
the NB-IoT fixed terminal negotiates tracking area update TAU time;
when the TAU time does not establish connection with the NB-IoT fixed terminal, changing the identification of the NB-IoT mobile terminal into the identification of the NB-IoT fixed terminal.
10. The method of claim 9, further comprising:
synchronizing the clock time of the NB-IoT fixed terminal when the connection is established with the NB-IoT fixed terminal.
11. The method of claim 9, further comprising:
configuring a TAU sequence of the NB-IoT fixed terminal.
12. The method of claim 9, wherein changing the identity of the NB-IoT mobile terminal to the identity of the NB-IoT fixed terminal when the TAU time does not establish a connection with the NB-IoT fixed terminal comprises:
when the TAU time does not establish connection with the NB-IoT fixed terminal, the identity of the NB-IoT mobile terminal is changed into the identity of the NB-IoT fixed terminal through an eSIM protocol.
13. The method of claim 9, further comprising:
and deleting the TAU information and the identification information of the NB-IoT mobile terminal when the TAU time does not establish connection with the NB-IoT fixed terminal for many times.
14. A computer storage medium, characterized in that a computer program is stored thereon which, when being executed by a processor, carries out the steps of a method according to any one of claims 9 to 13.
15. An electronic device comprising one or more processors, and memory for storing one or more programs; the one or more programs, when executed by the one or more processors, implement the method of any of claims 9 to 13.
CN202010584339.6A 2020-06-24 2020-06-24 NB-IoT fixed terminal and vehicle-mounted mobile NB-IoT system Active CN111601368B (en)

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