WO2016184186A1

WO2016184186A1 - Distance measuring method, base station and computer storage medium

Info

Publication number: WO2016184186A1
Application number: PCT/CN2016/073909
Authority: WO
Inventors: 徐维江
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-10-15
Filing date: 2016-02-17
Publication date: 2016-11-24
Also published as: CN106604319A

Abstract

Disclosed are a distance measuring method, a base station and a computer storage medium, used for solving the technical problem of high requirement on a device caused by a conventional distance measuring mode. The method comprises: a first base station sends a radio resource control (RRC) reconfiguration message, carrying measurement configuration information, to a terminal attached to the first base station; and the first base station receives a measurement report reported by the terminal, and obtains, according to information carried in the measurement report, a distance between same and the terminal.

Description

Ranging method, base station and computer storage medium

Technical field

The present invention relates to the field of communications technologies, and in particular, to a ranging method, a base station, and a computer storage medium.

Background technique

Wireless communication technology has penetrated into all aspects of people's lives and work, including daily use of mobile phones, wireless phones, etc., including 3G (third generation mobile communication technology), WLAN (Wireless Local Area Networks), UWB (Ultra) -Wideband, ultra-wideband), Bluetooth, broadband satellite systems, and digital TV are all popular wireless communication technologies.

LTE (Long Term Evolution) is a long-term evolution of the UMTS (Universal Mobile Telecommunications System) technology standard developed by the 3GPP (The 3rd Generation Partnership Project). The LTE system introduces key technologies such as OFDM (Orthogonal Frequency Division Multiplexing) and MIMO (Multi-Input & Multi-Output), which significantly increase the spectrum efficiency and data transmission rate.

The LTE standard system specification TS36.355 (LTE Positioning Protocol) defines the implementation of the positioning service. For example, if the base station and the terminal support the functions defined by the specification, the real-time location information of the terminal can be obtained on the base station side (for example, Longitude and latitude), according to the location information of the base station itself, the distance between the terminal and the base station can be calculated.

However, this method has certain limitations in measuring distance. First, both the terminal and the base station are required to support the TS36.355 protocol, and the terminal is required to have a GPS (Global Positioning System) module, and the terminal must ensure that the terminal can be used during ranging. Normally receive satellite signals. But in reality, not all terminals and base stations can support the TS36.355 protocol, and Not all terminals have a GPS module. It can be seen that the ranging method in the prior art is complicated to implement and has high requirements on equipment.

Summary of the invention

In view of this, the embodiments of the present invention are directed to providing a ranging method, a base station, and a computer storage medium, which are used to solve the technical problem that the current ranging method has high requirements on the device.

To achieve the above objective, the technical solution of the embodiment of the present invention is implemented as follows:

In a first aspect, an embodiment of the present invention provides a ranging method, where the method includes:

Transmitting, by the first base station, a radio resource control (RRC) reconfiguration message carrying measurement configuration information to the terminal attached to the first base station;

The first base station receives the measurement report reported by the terminal, and obtains a distance from the terminal according to the information carried in the measurement report.

In the above solution, the method further includes:

The first base station broadcasts system information, where the system information carries a TAC (Tracking Area Code) of the cell of the first base station, and the TAC of the cell of the first base station and the terminal are originally accessed. The TAC of the cell of the second base station is different;

The first base station receives a TAU (Tracking Area Update) request message sent by the terminal, and sends a TAU reject message to the terminal; the TAU reject message carries a message indicating that the terminal reattaches. information.

In the above solution, before the first base station broadcasts the system information, the method further includes:

The first base station sets a signal strength of the first base station to a first signal strength, where the first signal strength is greater than a signal strength of the second base station.

In the above solution, the information carried in the measurement report is RSRP (Reference Signal Receiving Power) or TA (Time Advanced).

In the above solution, after obtaining the distance from the terminal according to the information carried in the measurement report, the method further includes:

The first base station releases an RRC connection with the terminal, and turns off the first base station or adjusts a signal strength of the first base station to a second signal strength; the second signal strength is less than the first The signal strength of the two base stations.

In a second aspect, an embodiment of the present invention provides a base station, where the base station includes:

a sending module, configured to send a radio resource control RRC reconfiguration message carrying measurement configuration information to a terminal attached to the first base station;

a receiving module, configured to receive a measurement report reported by the terminal;

The processing module is configured to obtain a distance from the terminal according to the information carried in the measurement report.

In the above scheme,

The sending module is further configured to: broadcast system information, where the system information carries the TAC of the cell of the base station, and the TAC of the cell of the base station is different from the TAC of the cell of the second base station that the terminal originally accesses;

The receiving module is further configured to: receive a TAU request message sent by the terminal;

The sending module is further configured to: send a TAU reject message to the terminal; and the TAU reject message carries information used to indicate that the terminal reattaches.

In the above solution, the processing module is further configured to:

Before the sending module broadcasts system information, setting a signal strength of the base station to a first signal strength; wherein the first signal strength is greater than a signal strength of the second base station.

In the above solution, the information carried in the measurement report is RSRP or TA.

In the above solution, the processing module is further configured to:

After obtaining the distance from the terminal according to the information carried in the measurement report, releasing the RRC connection with the terminal, and turning off the base station or adjusting the signal strength of the base station to the second signal Intensity; the second signal strength is less than a signal strength of the second base station.

Embodiments of the present invention provide a computer storage medium, where the computer storage medium is stored A computer program is stored for performing the ranging method described above.

According to the ranging method, the base station, and the computer storage medium provided by the embodiments of the present invention, after the terminal is attached to the first base station, the first base station may send an RRC reconfiguration message (RRC Connection Reconfiguration) carrying the measurement configuration information to the terminal, where the terminal After receiving the RRC reconfiguration message, the measurement report is sent to the first base station, and the first base station can obtain the information carried in the measurement report, so that the distance between the first base station and the terminal can be obtained. It can be seen that the ranging method in the embodiment of the present invention does not need the terminal to have the GPS module, and the terminal and the base station do not need to support the TS36.355 protocol, and the requirements on the device are low, and the implementation is also simple, and the deployment manner of the base station is flexible. By adopting the ranging method in the embodiment of the present invention, the tracking and distance monitoring effects of any designated terminal can be basically achieved, so the application scenario is wider, for example, it can be generally applied to civil, police, military, and national security fields.

DRAWINGS

1 is a schematic diagram of a wireless coverage range of a first base station according to an embodiment of the present invention;

2 is a flowchart of a distance measurement method according to an embodiment of the present invention;

3 is a schematic diagram of interaction of a ranging method in an embodiment of the present invention;

FIG. 4 is a structural block diagram of a first base station according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Hereinafter, some of the terms used in the present invention will be explained so as to be understood by those skilled in the art.

1) A terminal, which is a device that provides voice and/or data connectivity to a user, for example, may include a handheld device with wireless connectivity, or a processing device connected to a wireless modem. The terminal can communicate with the core network via the RAN to exchange voice and/or data with the RAN. The terminal may be referred to as a UE (user equipment), a wireless terminal, a mobile terminal, a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile, a remote station ( Remote Station), AP (Access Point), Remote Terminal, Access Terminal, User Terminal, User Agent, or User Device Wait. For example, it can be a mobile phone (or "cellular" phone), a computer with a mobile terminal, a portable, pocket, handheld, computer built-in or in-vehicle mobile device. For example, PCS (Personal Communication Service) telephone, cordless telephone, SIP (Session Initiation Protocol) telephone, WLL (Wireless Local Loop) station, PDA (Personal Digital Assistant), etc. .

2) A base station (e.g., an access point), specifically, a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface. For example, the base station may be an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in the LTE-A, which is not limited by the embodiment of the present invention.

3) The terms "system" and "network" in the present invention may be used interchangeably. "Multiple" means two or more. "and/or", describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately. In addition, the character "/", unless otherwise specified, generally indicates that the contextual object is an "or" relationship.

The LTE standard system specification TS36.355 defines the implementation of location services, for example, if the base station And the terminal supports the function defined by the specification, and the real-time location information (such as latitude and longitude) of the terminal can be obtained on the base station side, and then the distance between the terminal and the base station can be calculated according to the location information of the base station itself.

However, this method has certain limitations in measuring distance. First, both the terminal and the base station are required to support the TS36.355 protocol, and the terminal is required to have a GPS module, and the terminal must ensure that the terminal can normally receive satellite signals during ranging. However, in actual situations, not all terminals and base stations can support the TS36.355 protocol, and not all terminals have GPS modules. It can be seen that the ranging method in the prior art is complicated to implement and has high requirements on equipment.

The present invention fully considers the above problem. After the terminal is attached to the first base station, the first base station may send an RRC reconfiguration message carrying the measurement configuration information to the terminal, and the terminal sends the RRC reconfiguration message to the first base station after receiving the RRC reconfiguration message. The measurement report, the first base station can obtain the information carried in the measurement report, so that the distance between the first base station and the terminal can be obtained. It can be seen that the ranging method in the embodiment of the present invention does not need the terminal to have the GPS module, and the terminal and the base station do not need to support the TS36.355 protocol, and the requirements on the device are low, and the implementation is also simple, and the deployment manner of the base station is flexible. By adopting the ranging method in the embodiment of the present invention, the tracking and distance monitoring effects of any designated terminal can be basically achieved, so the application scenario is wider, for example, it can be generally applied to civil, police, military, and national security fields.

In order to obtain the distance from any terminal, a base station for performing ranging is provided in the embodiment of the present invention. For example, it is called a first base station. The software system of the first base station needs to meet the following conditions:

1. It is possible to attach any terminal to the first base station.

2. After the terminal successfully attaches in the first base station, the first base station can keep the RRC connection from being released.

3. The terminal can report the measurement report, for example, the terminal can periodically report the measurement report.

For example, referring to FIG. 1, in the embodiment of the present invention, the wireless coverage area of the first base station is directly It is superimposed with the original network where the terminal is located (that is, the wireless coverage area of the base station to which the terminal originally accesses), for example, the base station to which the terminal originally access is referred to as the second base station. In FIG. 1, A represents the wireless coverage of the first base station, and B represents the wireless coverage of the second base station.

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

Referring to FIG. 2, an embodiment of the present invention provides a ranging method, and a flow of the method is described as follows.

Step 201: The first base station sends a radio resource control RRC reconfiguration message carrying the measurement configuration information to the terminal attached to the first base station.

Step 202: The first base station receives the measurement report reported by the terminal, and obtains a distance from the terminal according to the information carried in the measurement report.

In the embodiment of the present invention, after the terminal is attached to the first base station, the first base station keeps the RRC connection with the terminal from being released, and the first base station may send an RRC reconfiguration message to the terminal, and carry the measurement in the RRC reconfiguration message. Configuration information. The format of the RRC reconfiguration message can refer to the prior art.

After receiving the RRC reconfiguration message sent by the first base station, the terminal may perform measurement according to the measurement configuration information carried in the terminal, and add the measurement result to the measurement report, and send the measurement report to the first base station, that is, the measurement result is measurement. The information carried in the report.

After receiving the measurement report, the first base station can obtain the distance from the terminal according to the measurement result of the terminal carried therein.

It can be seen that, in the ranging method provided in the embodiment of the present invention, only the terminal can report the measurement report, and there are no excessive requirements on the hardware facilities of the terminal and the base station, which can save the cost of the device and simplify the system structure.

Optionally, in another embodiment of the present invention, before the first base station sends the radio resource control RRC reconfiguration message carrying the measurement configuration information to the terminal attached to the first base station, the method further includes:

The first base station broadcasts system information (System Infomation), the system information carries the TAC (Tracking Area Code) of the cell of the first base station, the TAC of the cell of the first base station, and the cell of the second base station to which the terminal originally accesses Different TAC;

The first base station receives a TAU (Tracking Area Update) request message sent by the terminal, and sends a TAU reject message to the terminal; the TAU reject message carries information indicating that the terminal reattaches.

In order to simplify the deployment mode, in this embodiment, the first base station may not need to access the core network, and in order to implement the corresponding function, in this embodiment, the first base station may perform some modification on the software, that is, The first base station is capable of implementing some functions of the core network. For example, after receiving the TAU request message sent by the terminal, the first base station needs to have the capability to send a TAU reject message to the terminal.

In this embodiment, the first base station may periodically broadcast system information, and the system information broadcasted by each base station may carry the TAC of the cell in the base station, and the TACs broadcast by different base stations are generally different, and In the embodiment of the present invention, the first base station may set the broadcast TAC to be different from the second base station.

Then, after receiving the system information broadcast by the first base station, the terminal may acquire the TAC carried in the terminal. If the terminal determines that the acquired TAC is different from the TAC of the second base station accessed by the terminal, the terminal initiates a TAU process, that is, the terminal. A TAU request message is sent to the first base station.

If the terminal accesses the first base station through the TAU process, some signaling sent by the terminal may be encrypted signaling, and the first base station may not be able to learn the encryption mode, so that the decryption cannot be performed. Therefore, after receiving the TAU request message sent by the terminal, the first base station may send a TAU reject message to the terminal to reject the terminal accessing the first base station by using the TAU mode. However, the subsequent work needs to be performed by the terminal to access the first base station. Therefore, the first base station may carry a message indicating that the terminal reattaches to the first base station in the TAU reject message, and the terminal may receive the TAU reject message according to the The indication re-initiates the attach procedure to reattach to the first base station. The TAU process and the attachment process of the terminal to the base station are all existing processes in the prior art. The TAU reject message is a message defined in the standard, and is carried in the TAU reject message to indicate that the terminal reattaches to the first base station. The news is also available in the prior art, and will not be repeated here.

After the terminal attaches to the first base station through the attach procedure, the first base station may instruct the terminal not to encrypt when transmitting the signaling, so that the first base station can implement communication with the terminal.

Optionally, in another embodiment of the present invention, before the first base station broadcasts the system information, the method further includes:

The first base station sets the signal strength of the first base station to a first signal strength; wherein the first signal strength is greater than the signal strength of the second base station.

As described above, the wireless coverage of the first base station and the wireless coverage of the second base station may be superimposed. Therefore, to enable the terminal to normally receive the system information broadcast by the first base station, the signal strength of the first base station needs to be compared. Strong. Therefore, in this embodiment, the first base station may set the signal strength of the first base station to be greater than the signal strength of the second base station, so that the terminal generally receives the system information broadcast by the first base station preferentially, thereby being able to be normal. Complete the subsequent ranging tasks.

Optionally, in another embodiment of the present invention, the information carried in the measurement report is RSRP (Reference Signal Receiving Power) or TA.

That is, the first base station may acquire the RSRP carried in the measurement report, and estimate the distance between the first base station and the terminal according to the RSRP. For example, if the value of the RSRP is larger, the distance between the terminal and the terminal may be closer. The smaller the value of RSRP, the farther it may be from the terminal. Alternatively, the first base station may also parse the TA (Timing Advance) from the message header of the measurement report when receiving the measurement report sent by the terminal. According to the TA, the first base station may also estimate the first base station and the terminal. The distance between them. Regardless of whether the distance between the terminal and the terminal is determined according to the RSRP, or the distance between the terminal and the terminal is determined according to the TA, the specific process of determining the distance may refer to the prior art, and details are not described herein.

Optionally, in another embodiment of the present invention, after obtaining the distance from the terminal according to the information carried in the measurement report, the method further includes:

The first base station releases the RRC connection with the terminal, and turns off the first base station or the first base station The signal strength is adjusted to a second signal strength; the second signal strength is less than the signal strength of the second base station.

In this embodiment, the first base station may keep not releasing the RRC connection with the terminal within a certain length of time, for example, the first base station may send the RRC reconfiguration message carrying the measurement configuration information to the terminal multiple times during the duration ( For example, the first base station may receive the measurement report sent by the terminal multiple times, so that the distance between the terminal and the terminal may be obtained multiple times to improve the accuracy of the distance measurement.

After the duration, in order to enable the terminal to normally access the previously accessed base station (ie, the second base station), the first base station may release the RRC connection with the terminal. In addition, if the signal strength of the first base station is greater than the signal strength of the second base station, the first base station may be turned off in addition to the RRC connection with the terminal in order to ensure that the terminal can re-access the second base station. The first base station may further reduce the signal strength of the first base station, so that the terminal may re-access other base stations, for example, the second base station, to continue the normal service of the terminal.

Referring to FIG. 3, the ranging process provided in the embodiments of the present invention will be described below by way of an example.

In this example, the first base station is deployed in the network range where the terminal to be tested is located, and the TAC configuration of the cell of the first base station is different from the TAC of the cell of the network where the terminal is to be tested (ie, the TAC of the cell of the second base station). The signal strength of the first base station is greater than the signal strength of the second base station, and the first base station can complete part of the functions of the core network. In this example, the signal strength refers to, for example, the wireless signal strength.

Step 1: The first base station broadcasts system information. The terminal will receive the system information delivered by the first base station, because the signal strength of the first base station is greater than the signal strength of the original network where the terminal is located (ie, the signal strength of the second base station).

Step 2: The terminal learns from the received system information that the TAC configured by the first base station is inconsistent with the TAC of the original network where the terminal is located, and the terminal initiates a TAU process, that is, the terminal sends a TAU request message to the first base station.

Step 3: After receiving the TAU request message sent by the terminal, the first base station may complete the function of the part of the core network, that is, may reply the TAU reject message to the terminal, and carry the indication “request the terminal to reattach to the first base station” in the message. .

Step 4: After receiving the TAU reject message, the terminal re-initiates the RRC connection establishment process, that is, the attach procedure, that is, the terminal may send an attach request message to the first base station. The first base station can continue to complete the functions of the part of the core network at this time, complete the connection process interaction with the terminal, and establish an RRC connection with the terminal.

Step 5: After the terminal is attached, the first base station does not release the RRC connection with the terminal, and sends an RRC reconfiguration message carrying the measurement configuration to the terminal, for example, where the measurement configuration is periodic measurement.

Step 6: The terminal sends an RRC Connection Reconfiguration Complete message to the first base station.

Step 7: The terminal sends a measurement report to the base station periodically according to the periodic measurement requirement carried in the RRC reconfiguration message, and carries the real-time RSRP in the measurement report, and the first base station receives the measurement report.

The first base station can estimate the distance between the terminal and the first base station according to the RSRP carried therein. Alternatively, when receiving the measurement report, the first base station may also parse the TA from the message header of the measurement report, and according to the TA, the distance between the terminal and the first base station may also be estimated.

The first base station for ranging in the embodiments of the present invention is simple to implement, flexible in deployment, and capable of achieving tracking and distance monitoring effects on any designated terminal. Therefore, the application of the ranging method provided in various embodiments of the present invention is applicable. The scene is more extensive and suitable for civil, police, military, and national security.

Referring to FIG. 4, based on the same inventive concept and the foregoing embodiments, an embodiment of the present invention provides a base station, which may be the first base station according to any of the preceding embodiments. The first base station may include a sending module 401, a receiving module 402, and a processing module 403.

The sending module 401 is configured to send the carried measurement to the terminal after the terminal is attached to the first base station. RRC reconfiguration message of configuration information;

The receiving module 402 is configured to receive the measurement report reported by the terminal;

The processing module 403 is configured to obtain a distance from the terminal according to the information carried in the measurement report.

Optionally, in another embodiment of the present invention,

The sending module 401 is further configured to: before the terminal is attached to the first base station, broadcast system information, where the system information carries the TAC of the cell of the first base station, the TAC of the cell of the first base station, and the cell of the second base station that the terminal originally accesses Different TAC;

The receiving module 402 is further configured to: receive a TAU request message sent by the terminal;

The sending module 401 is further configured to: send a TAU reject message to the terminal; and the TAU reject message carries information indicating that the terminal reattaches.

Optionally, in another embodiment of the present invention, the processing module 403 is further configured to:

Before the sending module 401 broadcasts the system information, setting the signal strength of the first base station to the first signal strength; wherein the first signal strength is greater than the signal strength of the second base station.

Optionally, in another embodiment of the present invention, the information carried in the measurement report is RSRP or TA.

After obtaining the distance from the terminal according to the information carried in the measurement report, releasing the RRC connection with the terminal, and turning off the first base station or adjusting the signal strength of the first base station to the second signal strength; the second signal strength Less than the signal strength of the second base station.

In a practical application, the specific structures of the sending module 401, the receiving module 402, and the processing module 403 may correspond to a processor. The specific structure of the processor may be a CPU (Central Processing Unit), an MPU (Micro Processor Unit), a DSP (Digital Signal Processor), or an FPGA (Field Programmable Gate Array). , field programmable gate array) and other electronic components with processing functions A collection of pieces or electronic components. The processor includes executable code, the executable code is stored in a storage medium, and the processor may be connected to the storage medium through a communication interface such as a bus, when performing a corresponding function of each module. Reading and running the executable code from the storage medium. The portion of the storage medium used to store the executable code is preferably a non-transitory storage medium.

The sending module 401, the receiving module 402, and the processing module 403 may be integrated corresponding to the same processor, or respectively corresponding to different processors; when the integration corresponds to the same processor, the processor adopts the time division processing of the sending module 401. The function corresponding to the receiving module 402 and the processing module 403.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the ranging method described in the foregoing embodiments.

In the embodiment of the present invention, after the terminal is attached to the first base station, the first base station may send an RRC reconfiguration message carrying the measurement configuration information to the terminal, and the terminal sends a measurement report to the first base station after receiving the RRC reconfiguration message. The first base station can obtain the information carried in the measurement report, so that the distance between the first base station and the terminal can be obtained. It can be seen that the ranging method in the embodiment of the present invention does not need the terminal to have the GPS module, and the terminal and the base station do not need to support the TS36.355 protocol, and the requirements on the device are low, and the implementation is also simple, and the deployment manner of the base station is flexible. By adopting the ranging method in the embodiment of the present invention, the tracking and distance monitoring effects of any designated terminal can be basically achieved, so the application scenario is wider, for example, it can be generally applied to civil, police, military, and national security fields.

It will be clearly understood by those skilled in the art that for the convenience and brevity of the description, only the division of each functional unit described above is exemplified. In practical applications, the above function assignment can be completed by different functional units as needed. The internal structure of the device is divided into different functional units to perform all or part of the functions described above. The system, device and described above For the specific working process of the unit, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit or unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above embodiments are only used to describe the technical solutions of the present application in detail, but the description of the above embodiments is only used to help understand the method and core ideas of the embodiments of the present invention, and should not be construed as an embodiment of the present invention. limits. A person skilled in the art can easily conceive changes or substitutions within the scope of the invention as disclosed in the embodiments of the present invention.

Industrial applicability

In the embodiment of the present invention, after the terminal is attached to the first base station, the first base station may send an RRC reconfiguration message carrying the measurement configuration information to the terminal, and the terminal sends a measurement report to the first base station after receiving the RRC reconfiguration message. The first base station can obtain the information carried in the measurement report, so that the distance between the first base station and the terminal can be obtained; thus, the ranging method in the embodiment of the present invention does not need the terminal to have the GPS module, and the terminal and the base station are not needed. Both support the TS36.355 protocol, which requires less equipment and is simple to implement. The deployment method of the base station is more flexible.

Claims

A ranging method, the method comprising:

Transmitting, by the first base station, a radio resource control RRC reconfiguration message carrying measurement configuration information to a terminal attached to the first base station;

The first base station receives the measurement report reported by the terminal, and obtains a distance from the terminal according to the information carried in the measurement report.
The method of claim 1 wherein the method further comprises:

The first base station broadcasts system information, where the system information carries a tracking area code TAC of a cell of the first base station, a TAC of a cell of the first base station, and a cell of a second base station that the terminal originally accesses Different TAC;

The first base station receives a tracking area update TAU request message sent by the terminal, and sends a TAU reject message to the terminal; the TAU reject message carries information indicating that the terminal reattaches.
The method of claim 2, wherein before the first base station broadcasts system information, the method further comprises:

The first base station sets a signal strength of the first base station to a first signal strength, where the first signal strength is greater than a signal strength of the second base station.
The method of claim 3, wherein the information carried in the measurement report is a reference signal received power RSRP or a timing advance TA.
The method according to claim 3 or 4, wherein after obtaining the distance from the terminal according to the information carried in the measurement report, the method further comprises:

The first base station releases an RRC connection with the terminal, and turns off the first base station or adjusts a signal strength of the first base station to a second signal strength; the second signal strength is less than the first The signal strength of the two base stations.
A base station, the base station comprising:

a sending module, configured to send a radio resource control RRC reconfiguration message carrying measurement configuration information to a terminal attached to the first base station;

a receiving module, configured to receive a measurement report reported by the terminal;

The processing module is configured to obtain a distance from the terminal according to the information carried in the measurement report.
The base station according to claim 6, wherein

The sending module is further configured to: broadcast system information, where the system information carries a tracking area code TAC of a cell of the base station, a TAC of a cell of the base station, and a cell of a second base station that the terminal originally accesses TAC is different;

The receiving module is further configured to: receive a tracking area update TAU request message sent by the terminal;

The sending module is further configured to: send a TAU reject message to the terminal; and the TAU reject message carries information used to indicate that the terminal reattaches.
The base station of claim 7, wherein the processing module is further configured to:

Before the sending module broadcasts system information, setting a signal strength of the base station to a first signal strength; wherein the first signal strength is greater than a signal strength of the second base station.
The base station according to claim 8, wherein the information carried in the measurement report is a reference signal received power RSRP or a timing advance TA.
The base station according to claim 8 or 9, wherein the processing module is further configured to:

After obtaining the distance from the terminal according to the information carried in the measurement report, releasing the RRC connection with the terminal, and turning off the base station or adjusting the signal strength of the base station to the second signal Intensity; the second signal strength is less than a signal strength of the second base station.
A computer storage medium having stored therein computer executable instructions for performing the method of any one of claims 1 to 5.