WO2009074085A1

WO2009074085A1 - A method and a system for location measurement and an apparatus thereof

Info

Publication number: WO2009074085A1
Application number: PCT/CN2008/073261
Authority: WO
Inventors: Juejun Liu; Jia Lin
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-11-30
Filing date: 2008-11-28
Publication date: 2009-06-18
Also published as: CN101453695A; CN101453695B

Abstract

A method and a system for location measurement and an apparatus thereof are disclosed in the present invention, the method comprises: an attaching base station transmits a message carrying a location measurement indication to an idle terminal; the said attaching base station locates the said terminal according to the scan measurement information which is reported by the said terminal. By the embodiments of the present invention, after being informed to perform the location measurement by the base station, the idle terminal is able to report the scan measurement information of the terminal, which enables the attaching base station to locate the terminal according to the scan measurement information of the terminal before the terminal accesses the network.

Description

Positioning measurement method, system and device The present application claims priority to Chinese Patent Application No. 200710188291.1, entitled "A Positioning Measurement Method, System and Apparatus", filed on November 30, 2007. The entire contents of which are incorporated herein by reference. Technical field

The present invention relates to the field of mobile communication technologies, and in particular, to a positioning measurement method, system and apparatus. Background technique

WiMAX (Worldwide Interoperability for Microwave Access), also known as 802.16 wireless metropolitan area network, is a "last mile" broadband wireless connection solution for enterprises and home users. It can be realized in the field of data communication. High coverage (can cover a range of 25 to 30 miles), based on the IEEE 802.16 family of broadband wireless standards. Among them, the IEEE 802.16 standard series has so far included seven standards of 802.16, 802.16a, 802.16c, 802.16d, 802.16e, 802.16f and 802.16g. Among them: 802.16, 16a, 16d belong to the fixed wireless access air interface standard, and 802.16e belongs to the mobile broadband wireless access air standard. The development trend of wireless access technology is to achieve higher capacity, greater coverage and achieve certain mobility by introducing new technologies, which coexist and complement each other with 3G networks. Therefore, due to the above-mentioned advantages of 802.16e technology, it has become the focus of the industry.

In the process of the U-TDOA (Uplink Time Difference Of Arriival) measurement algorithm defined in the 802.16e standard, the attached base station selects an appropriate cell according to the cell measurement report reported by the terminal. The neighboring base station then negotiates with the neighboring base station to request its dedicated CDMA (Code Division Multiple Access) code and measurement opportunity. The resources and information of the base station that requires the terminal to perform dedicated ranging are transmitted to the terminal through the MOB SCN-RSP (Mobile Scan Response) message. Terminal based on the cancellation The information in the information is used for ranging of dedicated CDMA codes for each base station (including the attached base station and the neighbor base station). Then, the neighboring base station aggregates the results of the ranging of the dedicated CDMA code to the attached base station, and the attached base station can calculate the location of the terminal according to the related information, and complete the positioning function of the LBS. A base station in which an idle state terminal resides is referred to as an attached base station. After the terminal completes the network access procedure and establishes a connection with the network, the base station is the serving base station. The attached base station and the serving base station are mutually convertible for different states of the terminal.

As shown in FIG. 1 , it is a flowchart of a U-TDOA measurement algorithm in the prior art 802.16e standard, where the process is that the terminal is not in an idle state, and includes the following steps:

Step S101: The attached base station requests the neighboring base station to allocate a dedicated ranging opportunity to the terminal. Step S102: The neighboring base station determines a dedicated ranging opportunity for the terminal, and returns a related parameter (frame number, CDMA code, transmission opportunity offset) for performing dedicated ranging between the terminal and the neighboring base station to the attached base station.

Step S103, the attached base station allocates a CDMA code and a transmission opportunity for a transmission opportunity between the terminal and the attached base station.

Step S104: The attached base station sends an RNG-RSP message (status=continue) to the terminal to request the terminal to initiate dedicated ranging for the attached base station, and the information required for the dedicated measurement of the attached base station carried by the message includes: a specified time, a CDMA code, and a measurement. Base station identification and transmission opportunity offset.

Step S105: The attached base station allocates a dedicated ranging resource to the terminal, and immediately indicates the resource in the UL-MAP after the specified time of the corresponding attached base station ranging in the RNG-RSP. The attached base station sets the dedicated ranging indication to 1 in the UL-MAP-IE.

Step S106: If there is a dedicated ranging resource in a specified time corresponding to the ranging of the attached base station, the terminal determines that the specific area is used to transmit the dedicated CDMA code, and determines to send the dedicated CDMA according to the transmission opportunity offset carried in the RNG-RSP. The transmission opportunity of the code, sending a dedicated CDMA code to the attached base station.

Step S107, the attached base station measures the timing adjustment amount t2.

Step S108: After receiving the dedicated ranging code sent by the terminal, the attached base station sends a MOB_SCN-RSP message to the terminal to request the terminal to initiate a dedicated ranging for the neighboring base station. The information required for the neighboring base station to be carried by the message includes: the identifier of the scanned neighboring base station, the scan type is ObO 10, the specified time, the CDMA code, and the transmission opportunity offset.

Step S109: The neighboring base station allocates a dedicated ranging resource, and indicates the resource in the UL-MAP after a specified time of ranging of the corresponding neighboring base station carried in the RNG-RSP. The neighbor base station sets the dedicated ranging indication to 1 in the UL-MAP-IE.

Step S110: If there is a dedicated ranging resource in a specified time corresponding to the ranging of the neighboring base station, the terminal determines that the specific area is used to send the dedicated CDMA code, and according to

The transmission opportunity offset carried in the RNG-RSP determines that the transmitter transmitting the dedicated CDMA code transmits a dedicated CDMA code to the neighbor base station.

Step S111, the neighboring base station receives the dedicated CDMA code, and measures the timing adjustment amount t3.

Step S112: After receiving the dedicated ranging CDMA code of the terminal, the neighboring base station returns a response to the RNG-RSP to the terminal.

Step S113, the neighbor base station returns a timing adjustment amount t3 to the attached base station.

Step S114, the attached base station calculates U-TDOA, Tl = (t2-t3)/2.

As shown in FIG. 2, a flowchart for performing LBS positioning measurement in a terminal idle state in the prior art, according to the prior art, if the terminal has an LBS positioning service request in the idle state, the terminal The base station where the base station sends the MOB-PAG-ADV message or other message, which carries an indication that the active terminal performs the positioning measurement of the LBS. After the terminal is woken up, the selected attached base station and the neighboring base station are ranging, and the positioning measurement can be performed with the attached base station after the terminal completes the initial ranging. In the initial ranging process, after the terminal measures the round-trip transmission delay RTD of the attached base station and the neighboring base station, the RNG-REQ (Ranging Request) message carries the measured base station identifier and the RTD value corresponding to each base station. , reported to the attached base station as a measurement report.

Step S201: The attached base station sends a MOB_PAG-ADV message request, and the activation terminal requests the terminal to perform LBS positioning measurement.

Step S202: After the terminal is activated, initiate initial ranging to the attached base station, and complete the process of initial ranging. And recording the round-trip transmission delay RTD of the attached base station and the neighboring base station, and the corresponding base station identifier in the initial ranging process. Step S203: After the initial ranging of the terminal is completed, the terminal reports a measurement report message to the attached base station, where the measurement report message carries the measured base station identifier and the RTD value corresponding to each base station.

Step S204: The attached base station sends a measurement report response message to the terminal, and performs positioning measurement on the terminal according to the base station identifier of the terminal and the RTD value corresponding to each base station.

In the process of implementing the embodiments of the present invention, the inventors have found that at least the following problems exist in the prior art: After being awake in the terminal idle mode to perform U-TDOA-based LBS positioning measurement, it is necessary to obtain an attached base station through initial ranging. Round trip transmission delay RTD with neighboring base stations. Therefore, in the above prior art, the positioning measurement cannot be performed in the initial ranging process, and the terminal can only perform the positioning measurement according to the return transmission delay RTD recorded by the terminal in the initial ranging after the terminal accesses the network. Moreover, the foregoing prior art uses the RNG-RSP message and the MOB-SCN-RSP message to transmit the dedicated ranging information of the attached base station and the neighboring base station to the terminal twice, which wastes the air interface resource.

In the U-TDOA measurement algorithm flow, after receiving the dedicated CDMA code, the neighboring base station directly responds to the terminal. Therefore, the terminal needs to stay at the frequency of receiving the signal of the neighboring base station, cannot perform dedicated ranging for the next base station, or cannot immediately return the attached base station to receive information, thereby increasing the battery consumption of the terminal and reducing the terminal performing the service request. speed. Summary of the invention

The embodiment of the invention provides a positioning measurement method, system and device, and the base station can complete the positioning measurement of the terminal before the terminal in the idle mode enters the network.

The embodiment of the invention provides a positioning measurement method, including:

The attached base station sends a message carrying the positioning measurement indication to the terminal in the idle state; the attached base station performs positioning measurement on the terminal according to the scan measurement information reported by the terminal.

An embodiment of the present invention further provides a positioning measurement system, including an attached base station, a terminal in an idle state, and at least one neighboring base station.

The attached base station is configured to send a message carrying the positioning measurement indication to the terminal, where Calculating the location of the terminal according to the positioning measurement initiated by the terminal; the terminal, after receiving the message carrying the positioning measurement indication of the attached base station, starting according to the message carrying the positioning measurement indication Positioning measurement

The neighboring base station is configured to perform positioning measurement on the terminal by using the attached base station. The embodiment of the present invention further provides a terminal, including a positioning measurement indication message receiving module, a scanning measurement information generating module, and a scanning measurement information sending module.

The positioning measurement indication message receiving module is configured to receive a message that is sent by the attached base station and carries the positioning measurement indication;

The scan measurement information generating module is configured to generate scan measurement information before or after receiving the message carrying the positioning measurement indication;

The scan measurement information sending module is configured to send scan measurement information generated by the scan measurement information generating module to the attached base station.

An embodiment of the present invention further provides an attaching base station, including a positioning measurement indication message sending module and a positioning measuring module.

The positioning measurement indication message sending module is configured to send a message carrying the positioning measurement indication to the terminal in an idle state;

The positioning measurement module is configured to perform positioning measurement on the terminal according to the scan measurement information of >3⁄4 on the terminal.

The technical solution of the embodiment of the present invention has the following advantages, because the terminal transmits the scan measurement information of the terminal to the attached base station after being notified by the base station to perform the positioning measurement, so that the attached base station can perform the terminal according to the scan measurement information of the terminal before the terminal accesses the network. The positioning measurement is performed, and the positioning measurement of the terminal can be completed in the initial ranging process. DRAWINGS

1 is a flow chart of a U-TDOA measurement algorithm in the 802.16e standard of the prior art; FIG. 2 is a flow chart of the prior art being awakened to perform LBS positioning measurement in a terminal idle state;

3 is a flowchart of a positioning measurement method according to an embodiment of the present invention;

4 is a flowchart of a positioning measurement method according to Embodiment 2 of the present invention; 5 is a flowchart of a positioning measurement method according to Embodiment 3 of the present invention;

6 is a flowchart of a method for positioning measurement according to Embodiment 4 of the present invention;

7 is a flowchart of a positioning measurement method according to Embodiment 5 of the present invention;

8 is a flowchart of a positioning measurement method according to Embodiment 6 of the present invention;

FIG. 9 is a structural diagram of a positioning measurement system according to an embodiment of the present invention. detailed description

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

Embodiment 1

As shown in FIG. 3, it is a flowchart of a positioning measurement method according to an embodiment of the present invention. In this embodiment, a terminal can actively send neighboring scanning measurement information to an attached base station after being activated, so that the attached base station is in initial ranging. It is possible to determine the ranging information of the terminal according to the neighboring area scanning measurement information and the neighboring base station, and the positioning measurement of the terminal can be completed in the initial ranging process.

The attached base station first sends a MOB_PAG-ADV message to the idle terminal to be tested, and requires the terminal to perform positioning measurement based on the U-TDOA algorithm. After receiving the MOB_PAG-ADV message, the terminal will go into the active state, select the best base station and perform the initial ranging process. Since the terminal has scanned the neighboring area before entering the idle state or in the idle state, the scanning result of the neighboring area is saved. Then, after the initial ranging process, the reported neighboring cell result report is reported to the attached base station by using the RNG-REQ message, and the RNG-REQ message includes the base station identifier and the corresponding CINR (Carrier to Interference Noise Ratio). , RSSI (Received Signal Strength Indication) and other parameters. After the attached base station receives the RNG-REQ message carrying the neighboring area scan measurement information of the terminal, the neighboring base station is selected to perform the negotiation of the measurement resources. The attached base station sends the measurement parameters such as the specified transmission time, the dedicated CDMA code, the access opportunity, and the time of the corresponding attached base station and the neighboring base station to the terminal through an RNG-RSP message. The terminal will perform the measurement according to the RNG-RSP message. From the parameters, dedicated ranging using dedicated CDMA codes is performed on the attached base station and the neighbor base station, respectively. After receiving the dedicated CDMA code of the terminal, the attached base station and the neighboring base station respectively respond back to the terminal. The attached base station calculates the U-TDOA by receiving the ranging of the dedicated CDMA code and the ranging information and the measurement result of the terminal-specific CDMA code reported by the neighboring base station to the attached base station, and completes the positioning measurement of the terminal. The specific steps are as follows:

Step S301: The base station sends a MOB_PAG-ADV message to the terminal, and performs positioning measurement of the positioning service based on the U-TDOA algorithm.

Step S302: After receiving the MOB_PAG-ADV message, the terminal will transit to the active state to perform a ranging process for the attached base station.

Step S303: If the terminal enters the idle state or is in the idle state, the neighboring cell has been scanned, and the measurement of the neighboring cell is saved. Then, after the initial ranging process, the scanned neighboring area scan measurement information is reported to the attached base station through the RNG-REQ message. The RNG-REQ message carries the scanning measurement report of the neighboring area, including the base station identifier of the neighboring area, the carrier-to-interference ratio CINR, the RSSL back-and-forth transmission delay, and the relative delay.

Step S304: The attached base station requests the neighboring base station to allocate a dedicated ranging opportunity to the terminal. Step S305, the neighboring base station determines a dedicated ranging opportunity for the terminal, and returns related parameters (frame number, CDMA code, transmission opportunity offset) for the dedicated ranging between the terminal and the neighboring base station to the attached base station.

Step S306, the attached base station allocates a CDMA code and a transmission opportunity for a transmission opportunity between the terminal and the attached base station.

Step S307, the attached base station sends an RNG-RSP message (status=continue) to the terminal to request the terminal to initiate dedicated ranging for the attached base station and the neighboring base station, and the information carried by the message is (the specified time, the CDMA code, the ranging base station) Identification, transmission opportunity offset).

Step S308: The attached base station allocates a dedicated ranging resource, and immediately indicates the resource in the UL-MAP after a specified time of the corresponding attached base station ranging in the RNG-RSP. The attached base station sets the dedicated ranging indication to 1 in the UL-MAP-IE.

Step S309, if there is a dedicated ranging resource within a specified time corresponding to the ranging of the attached base station, the terminal determines that the specific area is used to send the dedicated CDMA code, and according to The transmission opportunity offset carried in the RNG-RSP determines the transmission opportunity for transmitting the dedicated CDMA code, and transmits the dedicated CDMA code to the attached base station.

Step S310, the attached base station measures the timing adjustment amount t2.

Step S311: After receiving the dedicated ranging code sent by the terminal, the attached base station sends an RNG-RSP response to the terminal.

Step S312: The neighboring base station allocates a dedicated ranging resource, and immediately indicates the resource in the UL-MAP after a specified time of the ranging of the corresponding neighboring base station carried in the RNG-RSP. The neighbor base station sets the dedicated ranging indication to 1 in the UL-MAP-IE.

Step S313, if there is a dedicated ranging resource within a specified time of the corresponding neighboring base station ranging, the terminal determines that the specific area is used to transmit the dedicated CDMA code, and determines to transmit the dedicated CDMA according to the transmission opportunity offset carried in the RNG-RSP. The transmission opportunity of the code, sending a dedicated CDMA code to the neighboring base station.

Step S314, the neighboring base station receives the dedicated CDMA code, and measures the timing adjustment amount t3.

Step S315: After receiving the dedicated ranging of the terminal, the neighboring base station returns a response to the terminal. Step S316, the neighboring base station returns a measurement timing adjustment amount t3 to the attached base station.

Step S317, the attached base station calculates U-TDOA, Tl = (t2-t3)/2.

With the embodiment of the present invention, the terminal can actively report the neighbor report that the terminal has scanned after being activated by the base station, so that the attached base station can complete the positioning measurement of the terminal during the initial ranging according to the foregoing information. The technical defects of the positioning measurement can be avoided after the terminal needs to be connected to the network, and the time for positioning measurement is accelerated. And transmitting, by using an RNG-RSP message, measurement parameters such as a specified transmission time, a dedicated CDMA code, an access opportunity, and a time of the corresponding attached base station and the neighboring base station to the terminal, thereby saving air interface resources. Embodiment 2

As shown in FIG. 4, it is a flowchart of a positioning measurement method according to Embodiment 2 of the present invention. In this embodiment, a neighboring base station sends a response message to a terminal through an attached base station after receiving a dedicated CDMA code of the terminal. So that the terminal avoids waiting to receive the neighbor base station letter all the time. At the frequency of the number, the dedicated ranging for the next base station cannot be performed, or the technical defect of the attached base station receiving information cannot be immediately returned.

When the terminal to be tested is in an idle state, the network side needs to perform positioning measurement on the positioning service of the terminal. First, the attached base station sends a MOB_PAG-ADV message to the terminal, and the terminal is required to perform positioning measurement based on the U-TDOA algorithm. After receiving the MOB-PAG-ADV message, the terminal will go into the active state, select the best base station and perform the initial ranging process. The terminal has scanned the neighboring cell before entering the idle state or in the idle state, and saves the measurement of the neighboring cell. Then, after the initial ranging process, the scanned neighboring area scan measurement information is reported to the attached base station by using an RNG-REQ message (base station identifier, corresponding CINR, RSSI, and the like). After the attached base station receives the RNG-REQ message carrying the neighboring area scan measurement information of the terminal, the neighboring base station is selected to perform the negotiation of the measurement resources. The attached base station sends measurement parameters such as a specified transmission time, a dedicated CDMA code, an access opportunity, and a time of the corresponding attached base station and the neighboring base station to the terminal through two RNG-RSP messages. The terminal will perform dedicated ranging using the dedicated CDMA code to the attached base station and the neighbor base station according to the ranging parameters carried in the RNG-RSP message. The attached base station calculates the U-TDOA by receiving the ranging of the dedicated CDMA code and the ranging information and the measurement result of the terminal-specific CDMA code reported by the neighboring base station to the attached base station, and completes the positioning measurement of the terminal, which is implemented in this embodiment. The first difference is that the neighboring base station sends the response message to the terminal to the terminal through the attached base station, thereby avoiding that the terminal needs to stay at the frequency of receiving the signal of the neighboring base station, and cannot perform dedicated ranging for the next base station. The battery consumption of the terminal is increased, and the technical defect of the speed at which the terminal performs the service request is reduced. Specific steps are as follows:

Step S401: The attached base station sends a MOB_PAG-ADV message to the terminal for positioning measurement of the positioning service based on the U-TDOA algorithm.

Step S402, after receiving the MOB_PAG-ADV message, the terminal will transit to the active state to perform a ranging process for the attached base station.

Step S403: If the terminal enters the idle state or is in the idle state, the neighboring area has been scanned, and the measurement report of the neighboring area is saved. Then, after the initial ranging process, the scanned neighboring area scan measurement information is reported to the attached by the RNG-REQ message. The base station. The RNG-REQ message carries the scanning measurement report of the neighboring area, including the base station identifier of the neighboring area, the carrier-to-interference ratio CINR, the RSSL round-trip transmission delay, and the relative delay.

Step S404: The attached base station requests the neighboring base station to allocate a dedicated ranging opportunity to the terminal. Step S405, the neighboring base station determines a dedicated ranging opportunity for the terminal, and returns a related parameter (frame number, CDMA code, transmission opportunity offset) for the dedicated ranging between the terminal and the neighboring base station to the attached base station.

Step S406, the attached base station allocates a CDMA code and a transmission opportunity for a transmission opportunity between the terminal and the attached base station.

Step S407, the attached base station sends an RNG-RSP message (status=continue) to the terminal to request the terminal to initiate dedicated ranging for the attached base station, and the information carried by the message includes (specified time, CDMA code, base station identifier of the ranging, transmission opportunity) Offset).

Step S408: The attached base station allocates a dedicated ranging resource, and immediately indicates the resource in the UL-MAP immediately after a specified time of the corresponding attached base station ranging carried in the RNG-RSP. The attached base station sets the dedicated ranging indication to 1 in the UL-MAP-IE.

Step S409, if there is a dedicated ranging resource within a specified time corresponding to the ranging of the attached base station, the terminal determines that the specific area is used to transmit the dedicated CDMA code, and determines to send the dedicated CDMA according to the transmission opportunity offset carried in the RNG-RSP. The transmission opportunity of the code, sending a dedicated CDMA code to the attached base station.

Step S410, the attached base station measures the timing adjustment amount t2.

Step S411: After receiving the dedicated ranging code sent by the terminal, the attached base station sends an RNG-RSP message (status=continue) to the terminal to request the terminal to initiate dedicated ranging for the neighboring base station, and the information carried by the message is (required) The identity of the neighboring base station of the dedicated ranging, the specified time, the CDMA code, the base station identity of the ranging, and the transmission opportunity offset).

Step S412: The neighboring base station allocates a dedicated ranging resource, and immediately indicates the resource in the UL-MAP after a specified time of the ranging of the corresponding neighboring base station carried in the RNG-RSP. The neighbor base station sets the dedicated ranging indication to 1 in the UL-MAP-IE.

Step S413, if there is a dedicated ranging resource within a specified time of the corresponding neighboring base station ranging The source determines that the specific area is used to transmit the dedicated CDMA code, and determines the transmission opportunity of transmitting the dedicated CDMA code according to the transmission opportunity offset carried in the RNG-RSP, and sends the dedicated CDMA code to the neighboring base station.

Step S414, the neighboring base station receives the dedicated CDMA code, and measures the timing adjustment amount t3.

Step S415: The neighboring base station notifies the attached base station of the situation of receiving the dedicated ranging of the terminal, and simultaneously transmits the measured timing adjustment amount t3 to the attached base station.

Step S416, the attached base station returns the RNG-RSP carrying the neighbor base station information to notify the terminal that the neighbor base station has received the dedicated ranging CDMA code.

Step S417, the attached base station calculates U-TDOA, Tl = (t2-t3)/2.

With the embodiment of the present invention, the terminal can actively report the neighbor report that the terminal has scanned after being activated by the base station, so that the attached base station can complete the positioning measurement of the terminal during the initial ranging according to the foregoing information. The technical defects of the positioning measurement can be avoided after the terminal needs to be connected to the network, and the time for positioning measurement is accelerated. And after receiving the dedicated CDMA code of the terminal, the neighboring base station sends a response message to the terminal by using the attached base station, thereby avoiding that the terminal needs to stay at the frequency of receiving the signal of the neighboring base station, and cannot perform dedicated ranging for the next base station. , which increases the technical drawback of the battery consumption of the terminal. Embodiment 3

As shown in FIG. 5, it is a flowchart of a positioning measurement method according to Embodiment 3 of the present invention. In the first embodiment and the second embodiment, the attached base station sends the ranging information required by the terminal to the terminal through an RNG-RSP message. It is avoided that the two RNG-RSP messages are used to send the dedicated ranging information of the attached base station and the neighboring base station to the terminal twice, and the air interface resource waste technical defect is caused.

When the terminal to be tested is in an idle state, the network side needs to perform positioning measurement on the positioning service of the terminal. In this embodiment, the attached base station sends a MOB PAG-ADV message to the terminal, and the terminal is required to perform positioning measurement based on the U-TDOA algorithm. After receiving the MOB_PAG-ADV message, the terminal will go into the active state, select the best base station and perform the initial ranging process. Before the terminal enters the idle state or In the idle state, the neighboring area has been scanned, and the measurement of the neighboring area is saved. Then, after the initial ranging process, the scanned neighboring area scan measurement information is passed.

The RNG-REQ message (base station identifier, corresponding CINR, RSSI, etc.) is reported to the attached base station. After the attached base station receives the RNG-REQ message carrying the neighboring area scan measurement information, the neighboring base station is selected to perform the negotiation of the measurement resources. The attached base station sends measurement parameters such as a specified transmission time, a dedicated CDMA code, an access opportunity, and a time of the corresponding attached base station and the neighboring base station to the terminal through an RNG-RSP message. The terminal will perform dedicated ranging using the dedicated CDMA code for the attached base station and the neighboring base station according to the ranging parameters carried in the RNG-RSP message. The attached base station calculates the U-TDOA by receiving the ranging of the dedicated CDMA code and the ranging information and the measurement result of the terminal-specific CDMA code reported by the neighboring base station to the attached base station, and completes the positioning measurement of the terminal. The specific steps are as follows: Step S501, The attached base station sends a MOB_PAG-ADV message to the terminal for positioning measurement of the positioning service based on the U-TDOA algorithm.

Step S502: After receiving the MOB_PAG-ADV message, the terminal will transit to the active state to perform ranging on the attached base station.

Step S503: If the terminal is in the idle state or in the idle state, the neighboring area has been scanned, and the measurement of the neighboring area is saved. Then, after the initial ranging process, the scanned neighboring area scan measurement information is reported to the attached base station through the RNG-REQ message. The RNG-REQ message carries the scanning measurement report of the neighboring area, including the base station identifier of the neighboring area, the carrier-to-interference ratio CINR, the RSSL round-trip transmission delay, and the relative delay.

Step S504: The attached base station requests the neighboring base station to allocate a dedicated ranging opportunity to the terminal. Step S505, the neighboring base station determines a dedicated ranging opportunity for the terminal, and returns a related parameter (frame number, CDMA code, transmission opportunity offset) for the dedicated ranging between the terminal and the neighboring base station to the attached base station.

Step S506, the attached base station allocates a CDMA code and a transmission opportunity for a transmission opportunity between the terminal and the attached base station.

Step S507, the attached base station sends an RNG-RSP message (status=continue) to the terminal to request the terminal to initiate dedicated ranging for the attached base station and the neighboring base station, and the information carried by the message is (the specified time, the CDMA code, the ranging base station) Identification, transmission opportunity offset). Step S508, the attached base station allocates a dedicated ranging resource, and immediately indicates the resource in the UL-MAP immediately after the specified time of the corresponding attached base station ranging in the RNG-RSP. The attached base station sets the dedicated ranging indication to 1 in the UL-MAP-IE.

Step S509: If there is a dedicated ranging resource in a specified time corresponding to the ranging of the attached base station, the terminal determines that the specific area is used to transmit the dedicated CDMA code, and determines to send the dedicated CDMA according to the transmission opportunity offset carried in the RNG-RSP. The transmission opportunity of the code, sending a dedicated CDMA code to the attached base station.

Step S510, the attached base station measures the timing adjustment amount t2.

Step S511: After receiving the dedicated ranging code sent by the terminal, the attached base station sends an RNG-RSP response to the terminal.

Step S512: The neighboring base station allocates a dedicated ranging resource, and immediately indicates the resource in the UL-MAP after a specified time of the corresponding neighboring base station ranging in the RNG-RSP. The neighbor base station sets the dedicated ranging indication to 1 in the UL-MAP-IE.

Step S513, if there is a dedicated ranging resource in a specified time corresponding to the ranging of the neighboring base station, the terminal determines that the specific area is used to send the dedicated CDMA code, and determines to send the dedicated CDMA according to the transmission opportunity offset carried in the RNG-RSP. The transmission opportunity of the code, sending a dedicated CDMA code to the neighboring base station.

Step S514, the neighboring base station receives the dedicated CDMA code, and measures the timing adjustment amount t3.

Step S515: The neighboring base station notifies the attached base station of the situation of receiving the dedicated ranging of the terminal, and simultaneously transmits the measured timing adjustment amount t3 to the attached base station.

Step S516, the attached base station returns the RNG-RSP carrying the neighbor base station information to notify the terminal that the neighboring base station has received the dedicated ranging CDMA code.

Step S517, the attached base station calculates U-TDOA, Tl = (t2-t3)/2.

With the embodiment of the present invention, the terminal can actively report the neighbor report that the terminal has scanned after being activated by the base station, so that the attached base station can complete the positioning measurement of the terminal during the initial ranging according to the foregoing information. Avoid the terminal needs to be in the network after the network can be set The technical flaw of the bit measurement speeds up the time of positioning measurement. Embodiment 4

As shown in FIG. 6 , which is a flow chart of a positioning measurement method according to an embodiment of the present invention, in the embodiment of the present invention, when the terminal is in an idle state, the network side needs to perform positioning measurement on the positioning service of the terminal. First, the attached base station sends a MOB_PAG-ADV message to the terminal, and the terminal is required to perform positioning measurement based on the U-TDOA algorithm. After receiving the MOB PAG-ADV message, the terminal will go into the active state, select the best base station and perform the initial ranging process. The terminal has scanned the neighboring area before entering the idle state or in the idle state, and saves the neighboring area's measurement. Then, after the initial ranging process, the scanned neighbor report is reported to the attached base station by using an RNG-REQ message (base station identifier, corresponding CINR, RSSI, and the like). After the attached base station receives the RNG-REQ message carrying the neighboring area scan measurement information, the neighboring base station is selected to perform the negotiation of the measurement resources. The attached base station sends measurement parameters such as a specified transmission time, a dedicated CDMA code, an access opportunity, and a time of the corresponding attached base station and the neighboring base station to the terminal through an RNG-RSP message. The terminal will perform dedicated ranging using the dedicated CDMA code to the attached base station and the neighbor base station according to the ranging parameters carried in the RNG-RSP message. The attached base station transmits the response information of the measurement base station to the terminal through a RNG-RSP message by receiving the ranging of the dedicated CDMA code and the ranging information and the measurement result of the terminal-specific CDMA code reported by the neighboring base station to the attached base station, and simultaneously calculating the U. -TDOA, complete the positioning measurement of the terminal, the specific steps are as follows:

Step S601: The base station sends a MOB-PAG-ADV message to the terminal, and performs positioning measurement of the positioning service based on the U-TDOA algorithm.

Step S602: After receiving the MOB_PAG-ADV message, the terminal will transit to the active state to perform a ranging process for the attached base station.

Step S603: If the terminal enters the idle state or is in the idle state, the neighboring area has been scanned, and the measurement of the neighboring area is saved. Then, after the initial ranging process, the scanned neighbor report is reported to the attached base station through the RNG-REQ message.

The RNG-REQ message carries the scanning measurement report of the neighboring area, including the base station identifier of the neighboring area, Dry ratio CINR, RSSL back and forth transmission delay and relative delay.

Step S604: The attached base station requests the neighboring base station to allocate a dedicated ranging opportunity to the terminal. Step S605, the neighboring base station determines a dedicated ranging opportunity for the terminal, and returns related parameters (frame number, CDMA code, transmission opportunity offset) for the dedicated ranging between the terminal and the neighboring base station to the attached base station.

Step S606, the attached base station allocates a CDMA code and a transmission opportunity for a transmission opportunity between the terminal and the attached base station.

Step S607, the attached base station sends an RNG-RSP message (status=continue) to the terminal to request the terminal to initiate dedicated ranging for the attached base station and the neighboring base station, and the information carried by the message is (the specified time, the CDMA code, the ranging base station) Identification, transmission opportunity offset). At the same time set the timer.

Step S608: The attached base station allocates a dedicated ranging resource, and immediately indicates the resource in the UL-MAP after a specified time of the corresponding attached base station ranging in the RNG-RSP. The attached base station sets the dedicated ranging indication to 1 in the UL-MAP-IE.

Step S609, if there is a dedicated ranging resource within a specified time corresponding to the ranging of the attached base station, the terminal determines that the specific area is used to transmit the dedicated CDMA code, and determines to send the dedicated CDMA according to the transmission opportunity offset carried in the RNG-RSP. The transmission opportunity of the code, sending a dedicated CDMA code to the attached base station.

Step S610, the attached base station measures the timing adjustment amount t2.

Step S611: The neighboring base station allocates a dedicated ranging resource, and immediately indicates the resource in the UL-MAP after a specified time of the ranging of the corresponding neighboring base station carried in the RNG-RSP. The neighbor base station sets the dedicated ranging indication to 1 in the UL-MAP-IE.

Step S612, if there is a dedicated ranging resource within a specified time of the ranging of the corresponding neighboring base station, the terminal determines that the specific area is used to transmit the dedicated CDMA code, and determines to transmit the dedicated CDMA according to the transmission opportunity offset carried in the RNG-RSP. The transmission opportunity of the code, sending a dedicated CDMA code to the neighboring base station.

Step S613, the neighboring base station receives the dedicated CDMA code, and measures the timing adjustment amount. T3.

Step S614: The neighboring base station notifies the attached base station of the situation of receiving the dedicated ranging of the terminal, and simultaneously transmits the measured timing adjustment amount t3 to the attached base station.

Step S615: When the attached base station receives the response information of all the measured base stations at the set timing time, the RNG-RSP that carries the attached base station and the neighbor base station response information is sent to notify the terminal to know all the measurement base stations (including the attached base station and all neighboring base stations). A dedicated ranging CDMA code has been received. If the response information of all the measurement base stations has not been received before the timer expires, the RNG-RSP message carrying the response information of the attached base station and the received neighbor base station response information is sent to notify the terminal which base stations have received the dedicated ranging CDMA. code.

Step S616, the attached base station calculates U-TDOA, Tl = (t2-t3)/2.

With the embodiment of the present invention, the terminal can actively report the neighbor report that the terminal has scanned after being activated by the base station, so that the attached base station can complete the positioning measurement of the terminal during the initial ranging according to the foregoing information. The technical defects of the positioning measurement can be avoided after the terminal needs to be connected to the network, and the time for positioning measurement is accelerated. And the timer set by the base station is configured to send the response information of the attached base station and the received neighbor base station response information to the terminal, and notify the terminal, if the response information of all the measured base stations has not been received after the timer expires. The base station has received the dedicated CDMA code so that the terminal retransmits the dedicated CDMA code to the measurement base station that has not received the response information. The embodiment of the present invention also proposes the following two positioning measurement methods for the positioning mode of the D-TDOA:

Embodiment 5

As shown in FIG. 7, which is a flowchart of a positioning measurement method according to Embodiment 5 of the present invention, in this embodiment, after the terminal is woken up, the terminal selects an optimal base station as an attached base station to complete an initial ranging process, and measures and The round-trip delay RTD of the attached base station. At the same time, the terminal scans the neighboring base station and measures the downlink signal of the neighboring base station to obtain the relative delay RD of the terminal to the neighboring base station. When the terminal obtains the round-trip time RTD value of the attached base station and the relative delay RD of the terminal to the neighboring base station and the associated base station identity, the RNG-REQ message is obtained. The above information is carried to the attached base station. The attached base station can calculate the location of the terminal according to the information reported by the terminal, and the specific steps are as follows:

Step S701: The attached base station sends a MOB_PAG-ADV message to the terminal, and performs positioning measurement of the positioning service based on the D-TDOA algorithm.

Step S702: After receiving the MOB_PAG-ADV message, the terminal will transit to the active state to perform a ranging process for the attached base station.

Step S703: The terminal scans the neighboring base station and measures the downlink signal of the neighboring base station to obtain the relative delay RD of the terminal to the neighboring base station and the attached base station, and obtains the identifier of the scanning base station. At the same time, the round-trip delay RTD of the terminal to the neighboring base station and the attached base station is measured.

Step S704: The terminal sends an RNG-REQ message to the attached base station, and carries the relative delay between the attached base station and the neighbor base station to the terminal, the back-to-back delay of the terminal to the attached base station, and the identifier of the scanning base station.

Step S705, the network side calculates the location of the terminal by using the information in the obtained RNG-REQ message.

After the terminal is activated by the base station, the terminal can actively report the relative delay between the terminal and the neighboring base station scanned by the terminal, so that the attached base station can complete the initial ranging according to the foregoing information. Positioning measurement of the terminal. It avoids the technical defects of the positioning measurement after the terminal needs to be connected to the network, and speeds up the positioning measurement time. Embodiment 6

As shown in FIG. 8 , which is a flowchart of a positioning measurement method according to Embodiment 6 of the present invention, in the embodiment of the present invention, after the terminal to be tested wakes up, the best base station is selected as the attached base station to complete the initial ranging process, and The round-trip delay RTD of the attached base station is measured. If the terminal is in the previous idle mode, the cell has been scanned, and the relative delay between the attached base station and the neighbor base station to the terminal is obtained and saved, and the identity of the base station is scanned. Then, after the initial ranging process is completed after the activation, the cell scan measurement information that has already been saved is reported to the attached base station through the RNG-REQ. The network side can calculate the location of the terminal according to the information reported by the terminal. The specific steps are as follows: Step S801: The attached base station sends a MOB_PAG-ADV message to the terminal, and performs positioning measurement of the positioning service based on the D-TDOA algorithm.

Step S802: After receiving the MOB_PAG-ADV message, the terminal will transit to the active state to perform a ranging process for the attached base station.

Step S803, measuring the round-trip delay RTD of the terminal to the base station at the same time.

Step S804, the terminal sends an RNG-REQ message to the attached base station, and carries the relative delay between the saved attached base station and the neighbor base station to the terminal in the idle mode, the identifier of the scanning base station, and the round-trip back and forth between the terminal and the base station obtained after the activation. Delay RTD.

Step S805: The network side calculates the location of the terminal by using the information in the obtained RNG-REQ message.

According to the embodiment of the present invention, after being activated by the base station, the terminal can actively report the relative delay between the terminal and the neighboring base station that has been scanned by the terminal, so that the attached base station can complete the initial location according to the above information. The positioning measurement of the terminal. The technical defects of the positioning measurement can be avoided after the terminal needs to be connected to the network, and the time for positioning measurement is accelerated.

As shown in FIG. 9 , it is a structural diagram of a positioning measurement system according to an embodiment of the present invention. The positioning measurement system includes an attached base station 1, a terminal 2, and at least one neighboring base station 3. The attached base station 1 is configured to send a message carrying the positioning measurement indication to the terminal 2. And calculating the location of the terminal 2 according to the positioning measurement initiated by the terminal 2; the terminal 2 is configured to: after receiving the message carrying the positioning measurement indication of the attached base station 1, transition to the active state, and initiate positioning according to the message carrying the positioning measurement indication The neighboring base station 3 is configured to perform positioning measurement on the terminal 2 in conjunction with the attached base station 1.

The affixing base station 1 includes a locating measurement indication message sending module 11 and a locating and measuring module 12, and the locating measurement indication message sending module 11 is configured to send a message carrying the positioning measurement indication to the terminal 2 in an idle state; The scanning measurement information reported by the terminal 2 performs positioning measurement on the terminal 2.

The attached base station 1 further includes a negotiation module 13 and a ranging information sending module 14. The negotiation module 13 is configured to determine the ranging information of the terminal 2 by negotiating with the neighboring base station 3 according to the scan measurement information sent by the terminal 2; The module 14 is configured to send the ranging information to the terminal 2. The positioning measurement module 12 includes a U-TDOA measurement sub-module 121 for calculating the location of the terminal 2 according to the measurement results of the attached base station 1 and the neighbor base station 3.

The location measurement module 12 includes a D-TDOA measurement sub-module 122, configured to calculate the location of the terminal 2 according to the scan measurement information of >3⁄4 on the terminal 2, where the scan measurement information is that the terminal 2 scans the neighbor base station 3 and the attached base station 1 to downlink. The relative delay of the signal from the terminal 2 to the neighboring base station 3 and the attached base station 1.

The terminal 2 includes a positioning measurement indication message receiving module 21, a scan measurement information generating module 22, and a scan measurement information sending module 23, and the positioning measurement indication message receiving module 21 is configured to receive a message carrying the positioning measurement indication sent by the attached base station 1; The measurement information generating module 22 is configured to generate scan measurement information after receiving the message carrying the positioning measurement indication. The scan measurement information sending module 23 is configured to send the scan measurement information generated by the scan measurement information generating module 22 to the attached base station 1.

The scan measurement information generating module 22 includes a scan measurement information storage sub-module 221 and a scan measurement information collection sub-module 222, and the scan measurement information storage sub-module 221 is configured to save the carry-location measurement indication sent by the attached terminal 2 after receiving the attached base station 1. Scanning measurement information obtained before or after the message; the scan measurement information retrieval sub-module 222 is configured to: after receiving the message carrying the positioning measurement indication, retrieve the scan measurement information saved by the scan measurement information storage sub-module 221 to generate Scan measurement information.

The terminal 2 further includes a ranging information receiving module 24 and a positioning measurement initiating module 25, and the ranging information receiving module 24 is configured to receive the ranging information sent by the attached base station 1, and the ranging information is scanned by the attached base station 1 according to the neighboring area. And determining, by the neighboring base station 3, the positioning measurement initiating module 25 is configured to initiate positioning measurement according to the received ranging information.

The scan measurement information generating module 22 includes:

The downlink scanning sub-module 223 is configured to scan the downlink signal of the neighboring base station 3 and the attached base station 1 after the terminal 2 receives the message carrying the positioning measurement indication sent by the attached base station 1, and obtain the relative relationship between the terminal 2 and the neighboring base station 3 and the attached base station 1. Delay, CINR or RSSI, generate scan measurement information.

According to the embodiment of the present invention, after being activated by the base station, the terminal can actively report the neighboring area report scanned by the terminal or the phase of the terminal to the attached base station and the neighboring base station scanned by the terminal. The delay is such that the attached base station can complete the positioning measurement of the terminal at the initial ranging according to the above information. It avoids the technical defects of the positioning measurement after the terminal needs to enter the network, and accelerates the time of positioning measurement.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for making a A computer device (which may be a personal computer, server, or network device, etc.) performs the methods described in various embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Claims

Rights request

A positioning measurement method, comprising:

The locating measurement method according to claim 1, wherein the scan measurement information is information acquired by the terminal before or after receiving a message carrying the positioning measurement indication sent by the attached base station.

The locating measurement method according to claim 1, wherein the scanning measurement information comprises: the terminal scanning and measuring the terminal obtained by the neighboring base station and the attached base station, and the terminal to the neighboring base station and the attaching The relative delay of the base station;

The attached base station performs positioning measurement on the terminal according to the scan measurement information reported by the terminal, and specifically includes:

Receiving, by the attached base station, a relative delay of the terminal that is sent by the terminal to the neighboring base station and the attached base station;

The attached base station calculates a location of the terminal according to the relative delay.

4. The positioning measurement method according to claim 1, wherein the scanning measurement information comprises at least one of the following:

The terminal scans and measures a relative delay between the neighboring base station and the attached base station downlink signal, the neighboring base station to the neighboring base station, and an identifier of the base station, and the terminal detects The round-trip delay of the attached base station, the carrier-to-interference and noise ratio CINR of the scanning measurement base station, or the received signal strength indication RSSI of the scanning measurement base station.

The positioning measurement method according to claim 1, wherein the scanning measurement information is reported by the terminal to the attached base station by using a ranging request RNG-REQ message.

The positioning measurement method according to claim 1, wherein the attaching base station performs positioning measurement on the terminal according to the scan measurement information reported by the terminal, and specifically includes: Determining, by the neighboring base station, the ranging information of the terminal according to the scanning measurement information, and transmitting the ranging information to the terminal;

The terminal performs positioning measurement on the attached base station and the neighboring base station according to the ranging information;

The attached base station calculates a location of the terminal according to a measurement result returned by the neighboring base station and a measurement result of the attached base station to the terminal.

7. The positioning measurement method according to claim 6, wherein the scanning measurement information comprises at least one of the following:

CINR, RSSI or the identity of the base station for which the terminal scans the measurement.

The locating measurement method according to claim 6, wherein the scanning measurement information is reported by the terminal to the attached base station by using an RNG-REQ message.

The positioning measurement method according to claim 6, wherein the attached base station determines the ranging information of the terminal in negotiation with the neighboring base station according to the scan measurement information, and sends the ranging information to the location The terminal includes:

The attached base station requests the neighboring station to allocate at least one of the following contents to the terminal according to the scan measurement information reported by the terminal:

Specify the ranging time, the ranging transmission transmission opportunity offset, the code division multiple access CDMA code for ranging, or the identity of the ranging base station;

The attached base station acquires related ranging information of the neighboring base station from the neighboring base station; the attached base station allocates at least one of the following contents to the terminal: a specified ranging time, a ranging transmission transmission opportunity offset, The CDMA code for ranging and the identifier of the ranging base station;

The attached base station generates ranging information of the attached base station;

The attached base station sends the ranging information of the neighboring base station and the ranging information of the attached base station to the terminal.

The locating measurement method according to claim 9, wherein the attaching base station sends the ranging information of the neighboring base station and the ranging information of the attached base station to the terminal, and specifically includes:

The attached base station simultaneously measures ranging information of the neighboring base station and the attached base station The ranging information is sent to the terminal;

Or,

The attached base station first sends the ranging information of the attached base station to the terminal, and after the terminal performs ranging with the attached base station, sends the ranging information of the neighboring base station to the terminal.

The positioning measurement method according to claim 10, wherein the attached base station transmits the ranging information of the neighboring base station and the ranging information of the attached base station to the terminal.

The positioning measurement method according to claim 6, wherein the terminal performs positioning measurement on the attached base station and the neighboring base station according to the ranging information, which specifically includes:

The terminal transmits a dedicated CDMA code to the attached base station and the neighbor base station.

The positioning measurement method according to claim 12, wherein after the terminal sends the dedicated CDMA code to the attached base station and the neighboring base station, the method further includes: the neighboring base station sends a response message by using the attached base station Feedback to the terminal.

The positioning measurement method according to claim 6, wherein after the attaching base station sends the ranging information to the terminal, the method further includes:

The attached base station starts a timer, and after the timer expires, feeds back the response message of the attached base station and the received response message of the neighboring base station to the terminal.

A positioning measurement system, comprising: an attached base station, a terminal in an idle state, and at least one neighbor base station,

The attached base station is configured to send a message carrying the positioning measurement indication to the terminal, and calculate a location of the terminal according to the positioning measurement initiated by the terminal;

The terminal is configured to initiate a positioning measurement according to the message carrying the positioning measurement indication after receiving the message carrying the positioning measurement indication of the attached base station;

The neighboring base station is configured to perform positioning measurement on the terminal by using the attached base station.

A terminal, comprising: a positioning measurement indication message receiving module, a scanning measurement information generating module, and a scanning measurement information sending module,

The positioning measurement indication message receiving module is configured to receive a message that is sent by the attached base station and carries the positioning measurement indication; The scan measurement information generating module is configured to generate scan measurement information before or after receiving the message carrying the positioning measurement indication;

The terminal according to claim 16, wherein the scan measurement information generation module includes a scan measurement information storage submodule and a scan measurement information retrieval submodule, and the scan measurement information storage submodule is used to save the location. The scan measurement information obtained by the terminal before or after receiving the message carrying the positioning measurement indication sent by the attached base station;

The scan measurement information collection sub-module is configured to: after receiving the message carrying the positioning measurement indication, retrieve the scan measurement information saved by the scan measurement information storage sub-module to generate scan measurement information.

The terminal according to claim 17, further comprising a ranging information receiving module and a positioning measurement initiating module.

The ranging information receiving module is configured to receive the ranging information sent by the attached base station, where the ranging information is determined by the attached base station according to the scanning measurement information and negotiated with a neighboring base station;

The positioning measurement initiating module is configured to initiate a positioning measurement according to the ranging information.

The terminal according to claim 18, wherein the scan measurement information generating module comprises a downlink scan measurement sub-module,

The downlink scan measurement submodule is configured to scan and measure a downlink signal of the neighboring base station and the attached base station before or after the terminal receives the message carrying the location measurement indication, to generate scan measurement information;

The scan measurement information includes at least one of the following contents:

The relative delay of the terminal to the neighboring base station and the attached base station, the identity of the base station for scanning measurement, CINR or RSSI.

20. An attached base station, comprising: a positioning measurement indication message sending module and a positioning measurement module,

The positioning measurement indication message sending module is configured to send to the terminal in an idle state Sending a message carrying a positioning measurement indication;

The attached base station according to claim 20, further comprising a negotiation module and a ranging information delivery module,

The negotiation module is configured to determine, according to the scan measurement information sent by the terminal, the ranging information of the terminal by negotiating with the neighboring base station;

The ranging information sending module is configured to send the ranging information to the terminal.

22. The attached base station according to claim 21, wherein the positioning measurement module comprises a U-TDOA measurement sub-module, configured to calculate a location of the terminal according to measurement results of the attached base station and the neighboring base station.

The eNB according to claim 22, wherein the locating measurement module includes a D-TDOA measurement sub-module, configured to calculate a location of the terminal according to the scan measurement information reported by the terminal, where the scan measurement is performed. The information includes a relative delay of the terminal to scan the downlink signal of the neighboring base station and the attached base station to the neighboring base station and the attached base station.