CN108551767B

CN108551767B - Method and device for acquiring Minimum SI

Info

Publication number: CN108551767B
Application number: CN201780000024.9A
Authority: CN
Inventors: 洪伟
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2017-01-18
Filing date: 2017-01-18
Publication date: 2020-08-11
Anticipated expiration: 2037-01-18
Also published as: WO2018132968A1; CN108551767A

Abstract

The invention discloses a method and a device for acquiring Minimum SI (subscriber identity module), belonging to the field of wireless communication. The method comprises the following steps: the method comprises the steps of detecting a cell to which a terminal belongs under the condition that the terminal is in an INACTIVE Radio Resource Control (RRC) -INACTIVE state, detecting whether the second cell is in the same radio control area (RAN-based area) as a first cell when the cell to which the terminal belongs is changed from the first cell to the second cell, wherein the Minimum system information (Minimum SI) of the cells in the same RAN-based area is the same, and acquiring the Minimum SI of the second cell if the second cell is in the different RAN-based area as the first cell. By adopting the invention, the processing resource of the terminal can be saved.

Description

Method and device for acquiring Minimum SI

Technical Field

The invention relates to the field of wireless communication, in particular to a method and a device for acquiring Minimum SI.

Background

The base station may periodically broadcast an SI (System Information) for the terminal to access, and the terminal may receive the SI broadcast by the base station to which the current cell belongs, and then may access the base station according to the SI, so that the base station may transmit the communication message.

Currently, 5G (The Fifth Generation Mobile Communication Technology) is rapidly developed. The RAN2# conference, year 2016 and month 8, decided to distinguish between minium SI (Minimum System Information) and Other System Information in a 5G communication network. Minimum SI is the Minimum necessary information needed by the terminal to access the base station, and is used for the terminal to select a cell, acquire Other SI, access a cell, and the like. For a terminal in an RRC-INACTIVE (Radio resource control-INACTIVE) state, basic service processing may be performed only by acquiring a Minimum SI, and when a cell to which the terminal belongs changes, the terminal in the RRC-INACTIVE state may acquire the Minimum SI of a current cell and perform service processing based on the Minimum SI.

In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:

when a cell to which a terminal in an RRC-INACTIVE state belongs changes and cells before and after the change have the same Minimum SI, the terminal needs to repeatedly receive and process the Minimum SI, which wastes processing resources of the terminal.

Disclosure of Invention

In order to solve the problems in the prior art, embodiments of the present invention provide a method and an apparatus for acquiring Minimum SI. The technical scheme is as follows:

in a first aspect, a method for acquiring Minimum SI is provided, the method including:

under the condition that a terminal is in an INACTIVE RRC-INACTIVE state of radio resource control connection, detecting a cell to which the terminal belongs;

when a cell to which the terminal belongs is changed from a first cell to a second cell, detecting whether the second cell and the first cell are in the same radio control area RAN-based area, wherein Minimum system information Minimum SI of the cells in the same RAN-based area is the same;

and if the second cell and the first cell are in different RAN-based areas, acquiring the Minimum SI of the second cell.

Optionally, the detecting the cell to which the terminal belongs includes:

and periodically acquiring the synchronous message of the cell to which the terminal belongs, and detecting the cell to which the terminal belongs according to the synchronous message.

Optionally, the detecting whether the second cell is located in the same RAN-based area as the first cell includes:

acquiring a first cell identifier carried in the synchronization message of the first cell and a second cell identifier carried in the synchronization message of the second cell;

and detecting whether the second cell is in the same RAN-based area as the first cell according to the first cell identifier and the second cell identifier based on a pre-stored RAN-based area dividing result.

acquiring a first RAN-based area identifier carried in the synchronization message of the first cell and a second RAN-based area identifier carried in the synchronization message of the second cell;

detecting whether the second cell is located in the same RAN-based area as the first cell according to the first RAN-based area identifier and the second RAN-based area identifier.

Optionally, the method further includes:

when receiving an execution instruction of a large data volume service, acquiring Other system information Other SI of the second cell according to the Minimum SI of the second cell, and establishing service connection with the second cell based on the Other SI.

In a second aspect, an apparatus for acquiring Minimum SI is provided, the apparatus comprising:

the first detection module is used for detecting a cell to which a terminal belongs under the condition that the terminal is in a radio resource control connection INACTIVE RRC-INACTIVE state;

a second detecting module, configured to detect whether a cell to which the terminal belongs is in a same radio control area RAN-based area as a first cell when the cell to which the terminal belongs is changed from the first cell to the second cell, where Minimum system information Minimum SI of cells in the same RAN-based area is the same;

an obtaining module, configured to obtain a Minimum SI of the second cell if the second cell and the first cell are in different RAN-based areas.

Optionally, the first detecting module is configured to:

Optionally, the second detection module includes:

a first obtaining submodule, configured to obtain a first cell identifier carried in a synchronization message of the first cell and a second cell identifier carried in a synchronization message of the second cell;

and the first detection submodule is used for detecting whether the second cell is positioned in the same RAN-based area as the first cell according to the first cell identifier and the second cell identifier based on the pre-stored dividing result of the RAN-based area.

Optionally, the second detection module includes:

a second obtaining sub-module, configured to obtain a first RAN-based area identifier carried in the synchronization message of the first cell and a second RAN-based area identifier carried in the synchronization message of the second cell;

a second detecting sub-module, configured to detect whether the second cell is located in the same RAN-based area as the first cell according to the first RAN-based area identifier and the second RAN-based area identifier.

Optionally, the apparatus further comprises:

and the establishing module is used for acquiring Other system information Other SI of the second cell according to the Minimum SI of the second cell when receiving an execution instruction of the large data volume service, and establishing service connection with the second cell based on the Other SI.

In a third aspect, an apparatus for acquiring Minimum SI is provided, the apparatus comprising:

a processor;

a memory for storing the processor-executable instructions;

wherein the processor is configured to:

The technical scheme provided by the embodiment of the invention has the following beneficial effects:

in the embodiment of the present invention, a cell to which a terminal belongs is detected when the terminal is in an RRC-INACTIVE state of radio resource control connection, and when the cell to which the terminal belongs is changed from a first cell to a second cell, whether the second cell is in a same radio control area RAN-based area as the first cell is detected, where Minimum system information Minimum SI of cells in the same RAN-based area is the same, and if the second cell and the first cell are in different RAN-based areas, the Minimum system information Minimum SI of the second cell is obtained. Thus, when the cell to which the terminal in the RRC-INACTIVE state belongs changes, if the cells before and after the change belong to the same RAN-based area, the terminal does not need to repeatedly receive and process the Minimum SI, thereby saving the processing resources of the terminal.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a flowchart of a method for acquiring Minimum SI according to an embodiment of the present invention;

fig. 2 is a schematic flow chart of acquiring Minimum SI according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an apparatus for acquiring Minimum SI according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an apparatus for acquiring Minimum SI according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an apparatus for acquiring Minimum SI according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an apparatus for acquiring Minimum SI according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

Detailed Description

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

The embodiment of the invention provides a method for acquiring Minimum SI, wherein the execution main body of the method is a terminal and is realized by the assistance of a base station. The terminal may be any mobile terminal capable of communicating with the base station, such as a mobile phone, a vehicle-mounted electric meter, and the like. The terminal can be provided with a receiver, a transmitter, a processor and a memory, and the receiver and the transmitter can be respectively connected with the processor. The receiver may be used for transceiving messages or data, and may include, but is not limited to, an antenna, at least one amplifier, a tuner, one or more oscillators, a coupler, an LNA (low noise amplifier), a duplexer, and the like. The processor may be the control center of the terminal equipment, and various interfaces and lines are used to connect various parts of the whole terminal equipment, such as a receiver and a transmitter. In the present invention, the processor may be configured to obtain a Minimum SI related process, and optionally, the processor may include one or more processing units; the Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, etc. In particular, the program may include program code including computer operating instructions. The memory may be used to store data required and data generated during the processes described below. In this embodiment, a terminal is taken as an example of a mobile phone, and a detailed description of the scheme is performed, and other situations are similar to the above, and the detailed description is omitted in this embodiment.

The process flow shown in fig. 1 will be described in detail below with reference to specific embodiments, and the contents may be as follows:

and 101, detecting a cell to which the terminal belongs under the condition that the terminal is in an RRC-INACTIVE state.

In implementation, a user may operate to open a terminal, the terminal may be changed from a power-off state to a power-on state, the terminal may obtain a Minimum SI of a current cell to which the terminal belongs, and then obtain an Other SI of the cell according to the Minimum SI, so that the terminal may completely access the cell according to the Minimum SI and the Other SI, that is, an RRC connection state of the terminal is changed from an RRC-IDLE state to an RRC-CONNECT state. After the terminal is in the RRC-CONNECT state, if the terminal does not perform the large data volume service within the preset time period, the terminal enters the RRC-INACTIVE state, and the terminal in the RRC-INACTIVE state can perform the small data volume service. When the terminal is in the RRC-INACTIVE state, the terminal may periodically detect a cell to which the terminal currently belongs.

Optionally, the terminal may detect the cell to which the terminal belongs according to the synchronization message broadcasted by the cell, and the corresponding processing may be as follows: and periodically acquiring the synchronous message of the cell to which the terminal belongs, and detecting the cell to which the terminal belongs according to the synchronous message.

In implementation, the base station may broadcast a synchronization message of the cell, and after receiving the synchronization message of the cell, the terminal may perform time domain synchronization and frequency domain synchronization with the base station according to the message. When detecting the cell to which the terminal belongs, the terminal may periodically acquire a synchronization message of the cell to which the terminal currently belongs, where the synchronization message may carry identification information of the cell, and the terminal may detect the cell to which the terminal belongs according to the identification information of the cell. It can be understood that, if the terminal receives the synchronization messages of multiple cells, it indicates that the terminal is in an area covered by signals of multiple cells, and at this time, the terminal may compare the signal strengths of the synchronization messages of multiple cells, and then select the synchronization message with the highest signal strength as the synchronization message of the cell to which the terminal belongs, so as to detect the cell to which the terminal belongs.

Step 102, when the cell to which the terminal belongs is changed from a first cell to a second cell, detecting whether the second cell is in the same radio control area RAN-based area as the first cell.

Wherein the Minimum system information Minimum SI of cells in the same RAN-based area is the same.

In implementation, a technician at the base station side may perform RAN-based area division on all cells, i.e., divide cells with the same Minimum SI into the same RAN-based area. When the cell to which the terminal belongs is detected, if it is found that the cell to which the terminal currently belongs and the cell obtained by the last detection are not the same cell, that is, the cell to which the terminal belongs is changed from the first cell to the second cell, the terminal may determine whether the first cell and the second cell are in the same RAN-based area. If the cell to which the terminal belongs has not changed, no processing may be performed. Based on the above processing of detecting the cell to which the terminal belongs according to the synchronization message, if the cell identifier in the obtained synchronization message changes, the cell to which the terminal belongs changes. It should be noted that, in order to avoid false detection caused by signal interference or fluctuation, after the terminal acquires the synchronization message of the first cell, if the terminal continuously acquires the synchronization message of the second cell for multiple times, it may be assumed that the cell to which the terminal belongs is changed from the first cell to the second cell, and if the terminal only acquires the synchronization message of the second cell once, subsequent processing may not be performed.

Optionally, there may be multiple ways to detect whether two cells belong to the same RAN-based area, and two possible ways are given as follows:

the first method is as follows: acquiring a first RAN-based area identifier carried in a synchronization message of a first cell and a second RAN-based area identifier carried in a synchronization message of a second cell, and detecting whether the second cell and the first cell are in the same RAN-based area or not according to the first RAN-based area identifier and the second RAN-based area identifier.

In implementation, a network side technician may divide consecutive cells having the same Minimum SI into the same RAN-based area according to the Minimum SI of each cell, and then notify the base station of the RAN-based area to which each cell managed by the base station belongs, so that when the base station broadcasts a synchronization message of a cell, the synchronization message may carry identification information of the RAN-based area to which the cell belongs. Further, after receiving the synchronization message of the first cell, the terminal may obtain a first RAN-based area identifier carried in the synchronization message, and similarly, after receiving the synchronization message of the second cell, the terminal may obtain a second RAN-based area identifier carried in the synchronization message, and then the terminal may determine whether the second cell is located in the same RAN-based area as the first cell by determining whether the first RAN-based area identifier and the second RAN-based area identifier are the same.

The second method comprises the following steps: acquiring a first cell identifier carried in a synchronization message of a first cell and a second cell identifier carried in a synchronization message of a second cell, and detecting whether the second cell and the first cell are in the same RAN-based area or not according to the first cell identifier and the second cell identifier based on a pre-stored RAN-based area dividing result.

In implementation, a network side technician may divide consecutive cells having the same Minimum SI into the same RAN-based area according to the Minimum SI of each cell, and then may send the division result of the RAN-base area to the terminal through the base station, so that the terminal may store the division result of the RAN-base area locally. Specifically, the base station may periodically acquire the location of the terminal, and then send the result of dividing the RAN-base area of the cell near the location of the terminal to the terminal. Meanwhile, when the base station broadcasts the synchronization message of the cell, the synchronization message may carry the cell identifier of the cell, so that the terminal may obtain the first cell identifier carried in the synchronization message of the first cell and the second cell identifier carried in the synchronization message of the second cell. Then, the terminal may determine whether a first cell corresponding to the first cell identifier and a second cell corresponding to the second cell identifier are in the same RAN-based area based on a pre-stored division result of the RAN-based area.

Step 103, if the second cell and the first cell are in different RAN-based areas, acquiring Minimum SI of the second cell.

In implementation, when the cell to which the terminal belongs is changed from the first cell to the second cell, if the second cell and the first cell are in different RAN-based areas, the Minimum SI of the second cell may be acquired. Specifically, the base station may broadcast the Minimum SI of the cell periodically, and the terminal may receive and acquire the Minimum SI of the second cell broadcast by the base station, and further, the terminal may complete the process of initially accessing the second cell according to the Minimum SI of the second cell. If the second cell and the first cell are in the same RAN-based area, the terminal may not acquire the Minimum SI of the second cell, and may complete the preliminary access to the second cell according to the Minimum SI of the first cell. Fig. 2 simply shows the main processing flow of the present scheme.

Optionally, if there is an execution requirement for a large data traffic, the terminal may obtain the Other SI according to the Minimum SI, and the corresponding processing may be as follows: when receiving an execution instruction of a large data volume service, acquiring Other system information Other SI of the second cell according to the Minimum SI of the second cell, and establishing service connection with the second cell based on the Other SI.

In implementation, when the terminal is in the RRC-INACTIVE state, the user may control the terminal to execute a small data volume service, and if the user needs to control the terminal to execute a large data volume service, the terminal may receive an execution instruction of the large data volume service, and further may obtain a corresponding Other SI according to the Minimum SI, and establish a service connection with a current cell based on the Other SI. Specifically, when the terminal is in the second cell, if the execution instruction of the large data volume service is received, the Other SI of the second cell required by the service may be obtained from the base station of the second cell, where different services may correspond to different Other SIs, and identification information of each Other SI may be recorded in the Minimum SI, so that the terminal may obtain the Other SI required by the service by the Minimum SI. After that, the terminal may establish a service connection with the second cell based on the acquired Other SI.

Based on the same technical concept, an embodiment of the present invention further provides a device for acquiring Minimum SI, as shown in fig. 3, the device includes:

a first detecting module 301, configured to detect a cell to which a terminal belongs when the terminal is in an RRC-INACTIVE state;

a second detecting module 302, configured to detect, when a cell to which the terminal belongs changes from a first cell to a second cell, whether the second cell is located in a same RAN-based area as the first cell, where Minimum system information Minimum SI of cells in the same RAN-based area is the same;

an obtaining module 303, configured to obtain a Minimum SI of the second cell if the second cell and the first cell are in different RAN-based areas.

Optionally, the first detecting module 301 is configured to:

Optionally, as shown in fig. 4, the second detecting module 302 includes:

a first obtaining submodule 3021, configured to obtain a first cell identifier carried in the synchronization message of the first cell and a second cell identifier carried in the synchronization message of the second cell;

a first detecting sub-module 3022, configured to detect, based on a pre-stored RAN-based area dividing result, whether the second cell is located in the same RAN-based area as the first cell according to the first cell identifier and the second cell identifier.

Optionally, as shown in fig. 5, the second detecting module 302 includes:

a second obtaining sub-module 3023, configured to obtain a first RAN-based area identifier carried in the synchronization message of the first cell and a second RAN-based area identifier carried in the synchronization message of the second cell;

a second detecting sub-module 3024, configured to detect whether the second cell is located in the same RAN-based area as the first cell according to the first RAN-based area identifier and the second RAN-based area identifier.

Optionally, as shown in fig. 6, the apparatus further includes:

an establishing module 304, configured to, when an execution instruction of a large data volume service is received, obtain Other system information Other SI of the second cell according to the Minimum SI of the second cell, and establish a service connection with the second cell based on the Other SI.

It should be noted that: the apparatus for acquiring Minimum SI provided in the foregoing embodiment is only illustrated by dividing the functional modules when acquiring Minimum SI, and in practical applications, the function allocation may be completed by different functional modules according to needs, that is, the internal structure of the apparatus is divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus for acquiring Minimum SI and the method for acquiring Minimum SI provided in the above embodiments belong to the same concept, and specific implementation processes thereof are detailed in the method embodiments and are not described herein again.

Fig. 7 is a block diagram illustrating an apparatus 700 for acquiring Minimum SI in accordance with an example embodiment. The apparatus 700 may be provided as a terminal, for example, the apparatus 700 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.

Referring to fig. 7, apparatus 700 may include one or more of the following components: a processing component 702, a memory 704, a power component 706, a multimedia component 708, an audio component 710, an input/output (I/O) interface 712, a sensor component 714, and a communication component 716.

The processing component 702 generally controls overall operation of the device 700, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 702 may include one or more processors 720 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 702 may include one or more modules that facilitate interaction between the processing component 702 and other components. For example, the processing component 702 may include a multimedia module to facilitate interaction between the multimedia component 708 and the processing component 702.

The memory 704 is configured to store various types of data to support operations at the apparatus 700. Examples of such data include instructions for any application or method operating on device 700, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 704 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The power supply component 706 provides power to the various components of the device 700. The power components 706 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power supplies for the apparatus 700.

The multimedia component 708 includes a screen that provides an output interface between the device 700 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 708 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 700 is in an operation mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 710 is configured to output and/or input audio signals. For example, audio component 710 includes a Microphone (MIC) configured to receive external audio signals when apparatus 700 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal may further be stored in the memory 704 or transmitted via the communication component 716. In some embodiments, audio component 710 also includes a speaker for outputting audio signals.

The I/O interface 712 provides an interface between the processing component 702 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 714 includes one or more sensors for providing status assessment of various aspects of the apparatus 700. For example, sensor assembly 714 may detect an open/closed state of device 700, the relative positioning of components, such as a display and keypad of device 700, sensor assembly 714 may also detect a change in position of device 700 or a component of device 700, the presence or absence of user contact with device 700, orientation or acceleration/deceleration of device 700, and a change in temperature of device 700. The sensor assembly 714 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 714 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 714 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 716 is configured to facilitate wired or wireless communication between the apparatus 700 and other devices. The apparatus 700 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 716 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 716 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the apparatus 700 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as the memory 704 comprising instructions, executable by the processor 720 of the device 700 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

A non-transitory computer readable storage medium having instructions therein which, when executed by a processor of an apparatus 700, enable the apparatus 700 to perform a method of acquiring Minimum SI, the method comprising:

Optionally, the detecting the cell to which the terminal belongs includes:

Optionally, the method further includes:

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A method of acquiring Minimum SI, the method comprising:

if the synchronization message of a second cell is acquired for multiple times, determining that the cell to which the terminal belongs is changed from a first cell to the second cell, and detecting whether the second cell and the first cell are in the same radio control area RAN-based area, wherein the Minimum system information Minimum SI of the cells in the same RAN-based area is the same, and the first cell and the second cell are not the same cell;

if the second cell and the first cell are in different RAN-based areas, acquiring a Minimum SI of the second cell;

the detecting the cell to which the terminal belongs includes:

and periodically acquiring the synchronous message of the cell to which the terminal belongs, and detecting the cell to which the terminal belongs according to the identification information of the cell carried in the synchronous message, wherein the synchronous message of the cell to which the terminal belongs is the synchronous message with the highest signal intensity in the synchronous messages of a plurality of cells.

2. The method of claim 1, wherein the detecting whether the second cell is in a same RAN-based area as the first cell comprises:

3. The method of claim 1, wherein the detecting whether the second cell is in a same RAN-based area as the first cell comprises:

4. The method of claim 1, further comprising:

5. An apparatus for acquiring Minimum SI, the apparatus comprising:

a second detecting module, configured to determine that a cell to which the terminal belongs is changed from a first cell to a second cell if a synchronization message of the second cell is obtained multiple times, and detect whether the second cell is in a same radio control area RAN-based area as the first cell, where Minimum system information Minimum SI of cells in the same RAN-based area are the same, and the first cell and the second cell are not the same cell;

an obtaining module, configured to obtain a Minimum SI of the second cell if the second cell and the first cell are in different RAN-based areas;

the first detection module is configured to:

6. The apparatus of claim 5, wherein the second detection module comprises:

a first detection submodule, configured to detect, based on a pre-stored RAN-based area division result, whether the second cell is located in the same RAN-based area as the first cell according to the first cell identifier and the second cell identifier.

7. The apparatus of claim 5, wherein the second detection module comprises:

a second obtaining submodule, configured to obtain a first RAN-based area identifier carried in a synchronization message of the first cell and a second RAN-based area identifier carried in a synchronization message of the second cell;

a second detection submodule, configured to detect whether the second cell is located in the same RAN-based area as the first cell according to the first RAN-based area identifier and the second RAN-based area identifier.

8. The apparatus of claim 5, further comprising:

and the establishing module is used for acquiring Other system information Other SI of the second cell according to the MinimumSI of the second cell when receiving an execution instruction of the large data volume service, and establishing service connection with the second cell based on the Other SI.

9. An apparatus for acquiring Minimum SI, the apparatus comprising:

a processor;

a memory for storing the processor-executable instructions;

wherein the processor is configured to:

the detecting the cell to which the terminal belongs includes: