CN105813128A - Circuit domain fallback failure positioning method, device and system - Google Patents

Abstract

The invention discloses a method, device and system for locating the failure of circuit domain fallback, comprising: a terminal sends a request for sending and receiving a circuit domain service in an LTE network to a base station; receiving a circuit domain fallback instruction sent by the base station, and the circuit domain fallback The command carries the frequency point information of the wireless network and the measurement control information to be reported by the terminal; scan the frequency point signal in the frequency point information, and collect the measurement control information to be reported; When the preset access conditions are met, select to access the LTE network again, and send the collected measurement control information to be reported to the base station, and use the measurement control information to be reported to locate the reason for the CS domain fallback failure. By adopting the above-mentioned method provided by the embodiment of the present invention, the accurate positioning of the CS domain fallback failure problem is realized.

Description

Method, device and system for locating circuit domain fallback failure problem

technical field

The present invention relates to the field of communication technology, and in particular to a method, device and system for locating the problem of circuit domain fallback failure.

Background technique

At present, when the terminal is turned on, it is preferred to access the LTE network, but when using the LTE access, it cannot send and receive CS domain service signals. When the terminal needs to perform circuit domain (CS, CircuitSwitch) services (for example: initiate or receive voice services) under the LTE network, it is necessary to connect the currently used network from the LTE network to the circuit domain core network, that is, the 2G/3G network , and can correctly process the ongoing packet domain service of the terminal in the LTE network, therefore, a Circuit Switched Fallback (CSFB, Circuit Switched Fallback) technology is generated.

The existing process of the terminal falling back to the circuit domain core network on the LTE network is mainly as follows: when the terminal sends and receives a circuit domain service request, the terminal sends a message to the LTE base station eNodeB that the circuit domain service will be performed, and the eNodeB forwards the message to the LTE A network node (MME, MobilityManagementEntity), after receiving the message, the MME instructs the eNodeB to send a circuit domain fallback command to the terminal, and the command carries the target frequency point group of the circuit domain core network. The terminal scans the signals in each frequency point group, selects a frequency point signal that meets the access conditions, and then accesses the circuit domain core network.

Since the terminal may fail to fall back during the circuit domain fallback process, at this time, the network side cannot obtain any frequency point information and terminal information in the circuit domain core network that failed to access, and cannot solve the problem of the failure of the circuit domain fallback Accurate positioning cannot effectively improve the network quality in the future. Therefore, accurate positioning of the CS domain fallback failure problem is an urgent problem to be solved. There is no solution to this problem in the prior art.

Contents of the invention

Embodiments of the present invention provide a method, device, and system for locating a CS domain fallback failure, so as to solve the problem in the prior art that the CS domain fallback failure cannot be located.

An embodiment of the present invention provides a method for locating the CS domain fallback failure problem, including:

The terminal sends a request to send and receive circuit domain services in the LTE network to the base station;

receiving a circuit domain fallback command sent by the base station, where the circuit domain fallback command carries frequency point information of the wireless network and measurement control information to be reported by the terminal;

Scanning frequency point signals in the frequency point information, and collecting the measurement control information to be reported;

When the frequency point signal scanned within the preset time length does not meet the preset access condition, re-select to access the LTE network, and send the collected measurement control information to be reported to the base station for from The reason for the CS domain fallback failure is located in the measurement control information to be reported.

Through the above method provided by the embodiment of the present invention, since the terminal collects measurement control information that can reflect the problem of fallback failure during the circuit domain fallback process, and sends the collected information to the base station when the circuit domain fallback fails, so that it can pass The measurement control information reported by the terminal accurately locates the failure of the circuit domain fallback, which solves the problem that the failure of the circuit domain fallback cannot be located.

Further, the above method also includes:

When the circuit domain fallback instruction is received, the packet service in the LTE network is released.

Further, the above method also includes:

When the terminal releases the packet service in the LTE network and is in an off-network state, and does not access the CS domain core network within a preset period of time, it re-accesses the LTE network through reselection.

Further, the measurement control information to be reported includes: the frequency point signal information scanned by the terminal, the feedback form of signal quality and the location information of the terminal; the location information of the terminal is determined by the built-in global positioning system GPS of.

The embodiment of the present invention also provides a method for locating the CS domain fallback failure problem, including:

The base station forwards the received CS domain service request sent by the terminal to the network node;

Sending the received circuit domain fallback instruction sent by the network node to the terminal, the circuit domain fallback instruction carrying the frequency point information of the wireless network and the measurement control information to be reported by the terminal, and used to instruct the terminal to scan Frequency point signals in the frequency point information, and collecting the measurement control information to be reported;

receiving measurement control information sent by the terminal when CS domain fallback fails.

Through the above method provided by the embodiment of the present invention, since the terminal collects measurement control information that can reflect the problem of fallback failure during the circuit domain fallback process, and sends the collected information to the base station when the circuit domain fallback fails, so that it can pass The measurement control information reported by the terminal accurately locates the failure of the circuit domain fallback, which solves the problem that the failure of the circuit domain fallback cannot be located.

Further, the circuit domain fallback instruction carries a message instructing the terminal to release the packet service in the LTE network.

The embodiment of the present invention also provides a device for locating the CS domain fallback failure problem, including:

A first sending unit, configured to send a circuit domain service request sent and received in the LTE network to the base station;

a receiving unit, configured to receive a circuit domain fallback instruction sent by the base station, where the circuit domain fallback instruction carries frequency point information of the wireless network and measurement control information to be reported by the terminal;

A scanning unit, configured to scan frequency point signals in the frequency point information, and collect the measurement control information to be reported;

The second sending unit is configured to reselect to access the LTE network when the frequency point signal scanned within the preset time length does not meet the preset access condition, and send the collected measurement control information to be reported to The base station is configured to locate the reason of CS fallback failure from the measurement control information to be reported.

Through the above-mentioned device provided by the embodiment of the present invention, during the circuit domain fallback process, the measurement control information that can reflect the failure of the fallback problem is collected, and when the circuit domain fallback fails, the collected information is sent to the base station, so that the terminal can The reported measurement control information accurately locates the failure of the circuit domain fallback, which solves the problem that the failure of the circuit domain fallback cannot be located.

Further, the above-mentioned device also includes:

The release unit is configured to release the packet service in the LTE network when the circuit domain fallback instruction is received.

Further, the above-mentioned device also includes:

The access unit is configured to re-access the LTE network through reselection when the terminal releases the packet service in the LTE network and is in an off-network state, and does not access the CS domain core network within a preset period of time.

Further, the measurement control information to be reported includes: the frequency point signal information scanned by the terminal, the feedback form of signal quality and the location information of the terminal; the location information of the terminal is determined by the built-in global positioning system GPS of.

The embodiment of the present invention also provides a device for locating the CS domain fallback failure problem, including:

a forwarding unit, configured to forward the received circuit domain service request sent by the terminal to the network node;

A sending unit, configured to send the received circuit domain fallback command sent by the network node to the terminal, where the circuit domain fallback command carries frequency point information of the wireless network and measurement control information to be reported by the terminal, and is used for instructing the terminal to scan frequency point signals in the frequency point information, and collect the measurement control information to be reported;

The receiving unit is configured to receive the measurement control information sent by the terminal when CS domain fallback fails.

Through the above-mentioned device provided by the embodiment of the present invention, during the circuit domain fallback process, the measurement control information that can reflect the failure of the fallback problem is collected, and when the circuit domain fallback fails, the collected information is sent to the base station, so that the terminal can The reported measurement control information accurately locates the failure of the circuit domain fallback, which solves the problem that the failure of the circuit domain fallback cannot be located.

Further, the circuit domain fallback instruction carries a message instructing the terminal to release the packet service in the LTE network.

An embodiment of the present invention provides a positioning system for CS domain fallback failure, including: a terminal and a base station, wherein:

The terminal is configured to send and receive a circuit domain service request in the LTE network to the base station; receive a circuit domain fallback instruction sent by the base station, and the circuit domain fallback instruction carries frequency point information of the wireless network and terminal The measurement control information to be reported; scanning the frequency point signal in the frequency point information, and collecting the measurement control information to be reported; when the frequency point signal scanned within the preset time length does not meet the preset access condition , reselect to access the LTE network, and send the collected measurement control information to be reported to the base station;

The base station is configured to forward the received circuit domain service request sent by the terminal to the network node; send the received circuit domain fallback instruction sent by the network node to the terminal, and the circuit domain fallback instruction carries The frequency point information of the wireless network and the measurement control information to be reported by the terminal; receiving the measurement control information sent by the terminal when CS domain fallback fails.

Through the above-mentioned system provided by the embodiment of the present invention, during the circuit domain fallback process, the measurement control information that can reflect the failure of the fallback problem is collected, and when the circuit domain fallback fails, the collected information is sent to the base station, so that the terminal can The reported measurement control information accurately locates the failure of the circuit domain fallback, which solves the problem that the failure of the circuit domain fallback cannot be located.

Additional features and advantages of the application will be set forth in the description which follows, and, in part, will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

FIG. 1 is one of the flow charts of the method for locating the CS domain fallback failure problem provided by the embodiment of the present invention;

FIG. 2 is a flow chart of a method for locating CS domain fallback failure provided by an embodiment of the present invention;

FIG. 3 is a flowchart of a method for locating CS domain fallback failure provided by Embodiment 1 of the present invention;

FIG. 4 is a schematic structural diagram of a device for locating the circuit domain fallback failure problem provided by Embodiment 2 of the present invention;

FIG. 5 is a schematic structural diagram of a device for locating the circuit domain fallback failure problem provided by Embodiment 3 of the present invention;

FIG. 6 is a schematic structural diagram of a positioning system for the CS domain fallback failure problem provided by Embodiment 4 of the present invention.

detailed description

In order to provide a solution for locating the problem of circuit domain fallback failure, the embodiment of the present invention provides a method, device and system for locating the problem of circuit domain fallback failure. The following describes the preferred embodiment of the present invention in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, not to limit the present invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

An embodiment of the present invention provides a method for locating the CS domain fallback failure problem, as shown in FIG. 1 , including:

Step 101, the terminal sends a request to receive and receive CS domain services in the LTE network to the base station.

Step 102: Receive a circuit domain fallback command sent by the base station, where the circuit domain fallback command carries frequency point information of the wireless network and measurement control information to be reported by the terminal.

Step 103: Scan the frequency point signals in the frequency point information, and collect measurement control information to be reported.

Step 104. When the scanned frequency point signal does not meet the preset access conditions, send the collected measurement control information to be reported to the base station, and use the measurement control information to be reported to locate the reason for the failure of CS domain fallback. .

In the embodiment of the present invention, when the terminal receives and receives a circuit domain service request in the LTE network, for example: initiating a calling voice service or receiving a called voice service, the terminal reports the collected measurement control information to the base station to realize the failure of the circuit domain fallback problem location. Among them, the measurement control information reported by the terminal carried in the circuit domain fallback command indicates that the terminal can scan the information of each frequency point, the feedback form of signal quality (level value or signal-to-noise ratio), and the location information (latitude and longitude) of the terminal to report. The terminal reports the information of each frequency point scanned, including the level value or signal-to-noise ratio of the frequency point, and the longitude and latitude of itself to the base station. Wherein, the base station is a base station eNodeB of the LTE.

Correspondingly, the embodiment of the present invention also provides a method for locating the CS domain fallback failure problem, as shown in FIG. 2 , including:

Step 201, the base station forwards the received CS domain service request sent by the terminal to the network node.

Step 202: Send the received circuit domain fallback command sent by the network node to the terminal, the circuit domain fallback command carries the frequency point information of the wireless network and the measurement control information to be reported by the terminal, and is used to instruct the terminal to scan frequency The frequency point signal in the point information, and collect the measurement control information to be reported.

Step 203: Receive measurement control information sent by the terminal when CS domain fallback fails.

The method, device and corresponding system provided by the present invention will be described in detail below with specific embodiments in conjunction with the accompanying drawings.

Example 1:

FIG. 3 is a flow chart of a method for locating the CS domain fallback failure problem provided by an embodiment of the present invention, specifically including the following processing steps:

Step 301. When the terminal receives and receives a CS domain service request in the LTE network, it sends the CS domain service request to the base station.

In this step, since the terminal generally prefers the Long Term Evolution (LTE, Long Term Evolution) network when it is turned on, when the terminal in the LTE network receives and receives a circuit domain service request, for example, initiates the calling voice service or receives the called voice service, the terminal will The CS domain service request is sent to the LTE base station eNodeB.

Step 302, the base station forwards the circuit domain service request to the network node.

Wherein, the network node (MME, MobilityManagementEntity) is in the LTE network.

Step 303, the network node sends a circuit domain fallback instruction to the base station.

In this step, after receiving the CS domain service request, the network node returns a CS domain fallback instruction to the base station. Wherein, the circuit domain fallback command carries the frequency point information of the wireless network and the measurement control information to be reported by the terminal, and the measurement control information to be reported by the terminal includes: the information of each frequency point that the terminal can scan, the feedback form of signal quality (level value or signal-to-noise ratio), terminal location information (latitude and longitude). Wherein, the frequency point information of the wireless network is the frequency point of the 2G/3G network.

Further, the CS domain fallback instruction may also carry an LTE network release message, which is used to instruct the terminal to release the packet service in the LTE network.

Step 304, the base station forwards the CS fallback instruction to the terminal.

Specifically, after receiving the circuit domain fallback instruction, the base station may also return a circuit domain fallback instruction reception response to the MME, and the response indicates that the base station has received the circuit domain fallback instruction.

Step 305, the terminal scans the frequency point signals of each frequency point according to the received circuit domain fallback command, and collects signal information of each frequency point signal.

Wherein, the signal information of each frequency point signal may be a signal strength, a signal-to-noise ratio, and the like. The signal information of the collected signals of each frequency point can be saved locally.

Step 306, the terminal determines the current location information through the built-in global positioning system GPS.

Wherein, the location information may be latitude and longitude coordinates.

Step 307, after receiving the circuit domain fallback instruction, the terminal releases the packet service in the LTE network.

There is no strict sequence among the above steps 305, 306, 307.

Step 308: When the frequency point signals scanned by the terminal within the preset time period do not meet the preset access conditions, the collected measurement control information is sent to the base station.

In this step, the preset access condition can be set as the signal strength threshold for communication. When the signal strength of the frequency point scanned by the terminal within the preset time period is greater than the signal strength threshold, the preset access condition is met, and the terminal Access the frequency point signal to realize circuit domain fallback; when the signal strength of the frequency point scanned by the terminal is not greater than the signal strength threshold within the preset time period, the preset access condition is not met. At this time, the terminal is always in the Offline status. When the duration of the terminal being in the offline state is the preset duration, the terminal reselects to access the LTE network, and reports the collected measurement control information to the base station.

When the above terminal collects the signal information of each frequency point signal, it includes: the scanned frequency point information that meets the access conditions, and also includes the frequency point information that does not meet the access conditions, all of which are recorded, for example: when the terminal scans the frequency point information If the signal does not meet the preset access conditions, the terminal can record the signal strength of the frequency point, the current location information, etc.

Furthermore, the base station will store the received measurement and control information in a unified manner. Subsequent network optimization personnel can obtain the location information of the terminal circuit domain fallback failure and the quality of each frequency point of the circuit domain core network from the base station, and find out the failure of the circuit domain fallback. The reason is to locate the fallback failure problem, so that specific problems such as weak signal strength, mutual interference or cross interference can be solved by adjusting the transmit power of the base station and the tilt angle of the antenna.

Further, when the frequency point signal scanned by the terminal satisfies the preset access conditions and successfully falls back to the circuit domain network, the terminal initiates a service request to the base station subsystem (BSS, BaseStationSubsystem) of the circuit domain core network, and the BSS sends the service request to To the mobile switching center, the mobile switching center processes the service request, and then the circuit domain service can be performed. And when the terminal successfully falls back to the CS domain network, the collected measurement control information can be cleared.

Through the above method provided by the embodiment of the present invention, since the terminal collects measurement control information that can reflect the problem of fallback failure during the circuit domain fallback process, and sends the collected information to the base station when the circuit domain fallback fails, so that it can pass The measurement control information reported by the terminal accurately locates the failure of the circuit domain fallback, which solves the problem that the failure of the circuit domain fallback cannot be located.

Example 2:

Based on the same inventive concept, according to the method for locating the problem of circuit domain fallback failure provided by the above-mentioned embodiments of the present invention, correspondingly, Embodiment 2 of the present invention also provides a device for locating the problem of circuit domain fallback failure, and its structural diagram is shown in Figure 4 , including:

The first sending unit 401 is configured to send to the base station a request to send and receive circuit domain services in the LTE network;

The receiving unit 402 is configured to receive a circuit domain fallback instruction sent by the base station, where the circuit domain fallback instruction carries frequency point information of the wireless network and measurement control information to be reported by the terminal;

A scanning unit 403, configured to scan frequency point signals in the frequency point information, and collect the measurement control information to be reported;

The second sending unit 404 is configured to reselect to access the LTE network when the frequency point signal scanned within the preset time length does not meet the preset access condition, and send the collected measurement control information to be reported For the base station, it is used for locating the reason of CS fallback failure from the measurement control information to be reported.

Further, the above-mentioned device also includes:

The release unit 405 is configured to release the packet service in the LTE network when the circuit domain fallback instruction is received.

Further, the above-mentioned device also includes:

The access unit 406 is configured to re-access the LTE network through reselection when the terminal releases the packet service in the LTE network and is in an offline state, and does not access the CS domain core network within a preset period of time.

Further, the measurement control information to be reported includes: the frequency point signal information scanned by the terminal, the feedback form of signal quality and the location information of the terminal; the location information of the terminal is determined by the built-in global positioning system GPS of.

The functions of the above units may correspond to the corresponding processing steps in the flow shown in FIG. 1 or FIG. 3 , and will not be repeated here.

Example 3:

Based on the same inventive concept, according to the method for locating the problem of circuit domain fallback failure provided by the above-mentioned embodiments of the present invention, correspondingly, embodiment 3 of the present invention also provides a device for locating the problem of circuit domain fallback failure, and its structural diagram is shown in Figure 5 , including:

A forwarding unit 501, configured to forward the received circuit domain service request sent by the terminal to the network node;

The sending unit 502 is configured to send the received circuit domain fallback command sent by the network node to the terminal, where the circuit domain fallback command carries frequency point information of the wireless network and measurement control information to be reported by the terminal, and is used to Instructing the terminal to scan frequency point signals in the frequency point information, and collect the measurement control information to be reported;

The receiving unit 503 is configured to receive the measurement control information sent by the terminal when CS domain fallback fails.

Further, the circuit domain fallback instruction carries a message instructing the terminal to release the packet service in the LTE network.

The functions of the above units may correspond to the corresponding processing steps in the flow shown in FIG. 2 or FIG. 3 , and will not be repeated here.

Example 4:

Based on the same inventive concept, according to the method for locating the problem of circuit domain fallback failure provided by the above-mentioned embodiments of the present invention, correspondingly, embodiment 4 of the present invention also provides a system for locating the problem of circuit domain fallback failure, and its structural diagram is shown in Figure 6 , including: including: a terminal 601 and a base station 602, wherein:

The terminal 601 is configured to send to the base station a request for sending and receiving a circuit domain service in the LTE network; receive a circuit domain fallback instruction sent by the base station, and the circuit domain fallback instruction carries the frequency point information of the wireless network and The measurement control information to be reported by the terminal; scan the frequency point signal in the frequency point information, and collect the measurement control information to be reported; when the frequency point signal scanned within the preset time length does not meet the preset access When conditions are met, reselect to access the LTE network, and send the collected measurement control information to be reported to the base station;

The base station 602 is configured to forward the received circuit domain service request sent by the terminal to the network node; and send the received circuit domain fallback instruction sent by the network node to the terminal, and the circuit domain fallback instruction in the received circuit domain fallback instruction Carrying the frequency point information of the wireless network and the measurement control information to be reported by the terminal; receiving the measurement control information sent by the terminal when the CS domain fallback fails.

In the above-mentioned positioning system for the CS domain fallback failure problem shown in FIG. 6 provided in Embodiment 6 of the present invention, the further functions of the terminal 601 and the base station 602 included therein may correspond to those shown in FIG. 1 , FIG. 2 , and FIG. 3 The corresponding processing steps in the flow will not be repeated here.

To sum up, the solution provided by the embodiment of the present invention includes: the terminal sends a CS domain service request sent and received in the LTE network to the base station; receives the CS domain fallback command sent by the base station, and the CS domain fallback command carries the information of the wireless network Frequency point information and measurement control information to be reported by the terminal; scan the frequency point signal in the frequency point information, and collect the measurement control information to be reported; when the frequency point signal scanned within the preset time length does not meet the preset access conditions , select to access the LTE network again, and send the collected measurement control information to be reported to the base station, so as to locate the reason for the CS domain fallback failure from the measurement control information to be reported. By adopting the above-mentioned method provided by the embodiment of the present invention, the accurate positioning of the CS domain fallback failure problem is realized.

The device for locating the CS domain fallback failure problem provided by the embodiments of the present application may be implemented by a computer program. Those skilled in the art should be able to understand that the above-mentioned module division method is only one of many module division methods. If it is divided into other modules or not divided into modules, as long as the location device for the circuit domain fallback failure problem has the above functions, it should be in Within the protection scope of this application.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (10)

1. A method for locating a circuit domain fallback failure problem, characterized in that it comprises: The terminal sends a request to send and receive circuit domain services in the LTE network to the base station; receiving a circuit domain fallback command sent by the base station, where the circuit domain fallback command carries frequency point information of the wireless network and measurement control information to be reported by the terminal; Scanning frequency point signals in the frequency point information, and collecting the measurement control information to be reported; When the frequency point signal scanned within the preset time length does not meet the preset access condition, re-select to access the LTE network, and send the collected measurement control information to be reported to the base station for from The reason for the CS domain fallback failure is located in the measurement control information to be reported. 2. The method of claim 1, further comprising: When the circuit domain fallback instruction is received, the packet service in the LTE network is released. 3. The method of claim 2, further comprising: When the terminal releases the packet service in the LTE network and is in an off-network state, and does not access the CS domain core network within a preset period of time, it re-accesses the LTE network through reselection. 4. The method according to any one of claims 1-3, wherein the measurement control information to be reported includes: signal information of frequency points scanned by the terminal, feedback form of signal quality, and location information of the terminal ; The location information of the terminal is determined by the built-in global positioning system GPS. 5. A method for locating the problem of circuit domain fallback failure, characterized in that it comprises: The base station forwards the received CS domain service request sent by the terminal to the network node; Sending the received circuit domain fallback instruction sent by the network node to the terminal, the circuit domain fallback instruction carrying the frequency point information of the wireless network and the measurement control information to be reported by the terminal, and used to instruct the terminal to scan Frequency point signals in the frequency point information, and collecting the measurement control information to be reported; receiving measurement control information sent by the terminal when CS domain fallback fails. 6. The method according to claim 5, wherein the circuit domain fallback command carries a message instructing the terminal to release the packet service in the LTE network. 7. A device for locating the problem of circuit domain fallback failure, characterized in that it comprises: A first sending unit, configured to send a circuit domain service request sent and received in the LTE network to the base station; a receiving unit, configured to receive a circuit domain fallback instruction sent by the base station, where the circuit domain fallback instruction carries frequency point information of the wireless network and measurement control information to be reported by the terminal; a scanning unit, configured to scan frequency point signals in the frequency point information, and collect the measurement control information to be reported; The second sending unit is configured to reselect to access the LTE network when the frequency point signal scanned within the preset time length does not meet the preset access condition, and send the collected measurement control information to be reported to The base station is configured to locate the reason of CS fallback failure from the measurement control information to be reported. 8. The device of claim 7, further comprising: The release unit is configured to release the packet service in the LTE network when the circuit domain fallback instruction is received. 9. A device for locating the problem of circuit domain fallback failure, characterized in that it comprises: a forwarding unit, configured to forward the received circuit domain service request sent by the terminal to the network node; A sending unit, configured to send the received circuit domain fallback command sent by the network node to the terminal, where the circuit domain fallback command carries frequency point information of the wireless network and measurement control information to be reported by the terminal, and is used for instructing the terminal to scan frequency point signals in the frequency point information, and collect the measurement control information to be reported; The receiving unit is configured to receive the measurement control information sent by the terminal when CS domain fallback fails. 10. A positioning system for circuit domain fallback failure, characterized in that it includes: a terminal and a base station, wherein: The terminal is configured to send and receive a circuit domain service request in the LTE network to the base station; receive a circuit domain fallback instruction sent by the base station, and the circuit domain fallback instruction carries frequency point information of the wireless network and terminal The measurement control information to be reported; scanning the frequency point signal in the frequency point information, and collecting the measurement control information to be reported; when the frequency point signal scanned within the preset time length does not meet the preset access condition , reselect to access the LTE network, and send the collected measurement control information to be reported to the base station; The base station is configured to forward the received circuit domain service request sent by the terminal to the network node; send the received circuit domain fallback instruction sent by the network node to the terminal, and the circuit domain fallback instruction carries The frequency point information of the wireless network and the measurement control information to be reported by the terminal; receiving the measurement control information sent by the terminal when CS domain fallback fails.