CN107360617B - Method for sending positioning reference signal, base station and terminal - Google Patents

Abstract

The embodiment of the invention discloses a method for sending a Positioning Reference Signal (PRS), a base station and a terminal. The method comprises the following steps: when positioning requirements exist, a first base station configures a Positioning Reference Signal (PRS) window and PRS mapping information; and the first base station sends control information carrying the PRS window and the PRS mapping information to a terminal.

Description

A method for sending positioning reference signal, base station and terminal

technical field

The present invention relates to a wireless communication technology, and in particular, to a method for sending a Positioning Reference Signal (PRS, Positioning Reference Signal), a base station and a terminal.

Background technique

In an existing Long Term Evolution (LTE, Long Term Evolution) system, the PRS is sent periodically, and the time-frequency domain resources and the period of the PRS are configured by a higher layer. The Narrowband Internet of Things (NB-IOT) technology is mainly aimed at IoT terminals with large coverage, low cost and low power consumption. IoT terminals have high requirements on power consumption, and generally require that the battery can be used for more than 10 years. Therefore, the terminal side will try to reduce the reception of unnecessary signals and only receive necessary signals, so as to achieve the purpose of power saving. However, in the existing PRS periodic transmission method, regardless of whether the terminal has positioning requirements, the PRS is sent according to the PRS transmission period, so that the terminal receives unnecessary positioning reference signals, which will greatly consume the terminal's own power, which is not conducive to NB- Power saving requirements of IOT terminals.

SUMMARY OF THE INVENTION

In order to solve the existing technical problems, the embodiments of the present invention provide a method for transmitting a positioning reference signal, a base station and a terminal, which can realize aperiodic transmission and reception of PRS.

In order to achieve the above-mentioned purpose, the technical scheme of the embodiment of the present invention is realized as follows:

An embodiment of the present invention provides a method for sending a positioning reference signal, and the method includes:

When there is a positioning requirement, the first base station configures a Positioning Reference Signal (PRS) window and PRS mapping information;

The first base station sends the control information carrying the PRS window and the PRS mapping information to the terminal.

In the above solution, the first base station sends the control information carrying the PRS window and the PRS mapping information to the terminal, including:

The first base station sends downlink control information (DCI) or medium access control (MAC) signaling to the terminal; the DCI or the MAC signaling carries the PRS window and the PRS mapping information.

In the above solution, before the first base station sends the control information carrying the PRS window and the PRS mapping information to the terminal, the method further includes: the first base station notifies the neighboring base station of the PRS to be sent by X2 signaling. ; Wherein, the X2 signaling includes the subframe for starting to send the PRS, the continuous sending time of the PRS, the number of sending occasions of the PRS, and the sending occasion period of the PRS.

In the above solution, the first base station configures the PRS mapping information, including: the first base station configures the PRS continuous sending time, the number of base stations sending the PRS, the number of PRS sending opportunities, and the PRS sending occasion period.

In the above solution, configuring the PRS window by the first base station includes: configuring the length of the PRS window by the first base station and the number of opportunities for sending PRS in the PRS window;

The first base station configures the first transmission opportunity of the PRS in the PRS window to transmit the PRS; so that after receiving the X2 signaling, the neighboring base station preferentially uses the first transmission opportunity in the X2 signaling to transmit the PRS, only when the adjacent base station receives the X2 signaling. When the first transmission timing is occupied, the neighboring base station sequentially selects other transmission timings other than the first transmission timing to transmit the PRS.

In the above solution, the first base station sends DCI or MAC signaling to the terminal, including:

The first base station sends DCI or MAC signaling to the terminal; a preset field in the DCI or MAC signaling represents at least part of the PRS mapping information in the PRS mapping information; the at least part of the PRS mapping information includes: PRS The continuous transmission time, the number of base stations sending PRS, and the number of occasions for sending PRS.

An embodiment of the present invention further provides a method for sending a positioning reference signal, the method comprising:

The terminal receives the control information of the first base station;

The PRS is received based on the PRS window and PRS mapping information carried in the control information.

In the above solution, the terminal receiving the control information of the first base station includes: the terminal receiving the DCI or MAC signaling of the first base station;

Correspondingly, the receiving the PRS based on the PRS window and the PRS mapping information carried in the control information includes: receiving the PRS based on the PRS window and the PRS mapping information carried in the DCI or MAC signaling.

In the above scheme, the receiving PRS based on the PRS window and PRS mapping information carried in the DCI or MAC signaling includes:

The terminal periodically detects a preset field in the DCI or MAC signaling according to the configured PRS transmission opportunity period and the number of PRS transmission opportunities in the PRS window, and obtains the PRS mapping represented by the preset field information; the PRS mapping information includes: the continuous sending time of the PRS, the number of base stations that send the PRS, and the number of opportunities for sending the PRS;

The terminal determines the subframe for sending the PRS based on the PRS mapping information, and receives the PRS based on the subframe for sending the PRS.

In the above solution, the method further includes: after determining the subframe in which the PRS is not to be transmitted, stop receiving the PRS.

An embodiment of the present invention further provides a base station, the base station includes: a configuration unit and a sending unit; wherein,

The configuration unit is configured to configure a Positioning Reference Signal (PRS) window and PRS mapping information when there is a positioning requirement;

The sending unit is configured to send the control information carrying the PRS window and the PRS mapping information to the terminal.

In the above solution, the sending unit is configured to send downlink control information DCI or medium access control MAC signaling to the terminal; the DCI or the MAC signaling carries the PRS window and the PRS configured by the configuration unit mapping information, so that the terminal receives PRS based on the received PRS window in the DCI or MAC signaling and the PRS mapping information.

In the above solution, the sending unit is further configured to notify the neighboring base station of the PRS to be sent through X2 signaling before sending the control information carrying the PRS window and the PRS mapping information to the terminal; wherein, the X2 signaling It includes the subframe at which PRS starts to transmit, the continuous transmission time of PRS, the number of PRS transmission occasions, and the period of PRS transmission occasions.

In the above solution, the configuration unit is configured to configure the continuous sending time of the PRS, the number of base stations that send the PRS, the number of PRS sending occasions, and the PRS sending occasion period.

In the above scheme, the configuration unit is used to configure the length of the PRS window and the number of opportunities to send the PRS in the PRS window; It is also used to configure the first transmission opportunity of the PRS in the PRS window to send the PRS; to make After receiving the X2 signaling, the neighboring base station preferentially uses the first sending opportunity in the X2 signaling to send the PRS, and only when the first sending occasion is occupied, the neighboring base station selects the first sending occasion in sequence PRS is transmitted at other transmission timings.

In the above solution, the sending unit is configured to send DCI or MAC signaling to the terminal; a preset field in the DCI or MAC signaling represents at least part of the PRS mapping information in the PRS mapping information; the at least part of the PRS mapping information The PRS mapping information includes: the continuous sending time of the PRS, the number of base stations that send the PRS, and the number of occasions for sending the PRS.

An embodiment of the present invention further provides a terminal, where the terminal includes: a receiving unit and an identification processing unit; wherein,

the receiving unit, configured to receive the control information of the first base station; also configured to receive the PRS based on the identification processing result of the identification processing unit on the PRS window and the PRS mapping information carried in the control information;

The identification processing unit is configured to perform identification processing on the PRS window and PRS mapping information carried in the control information.

In the above solution, the receiving unit is used to receive the DCI or MAC signaling of the first base station; it is also used to identify the PRS window and PRS mapping information carried in the DCI or MAC signaling based on the identification processing unit. The processing result receives PRS;

The identification processing unit is configured to identify and process the PRS window and PRS mapping information carried in the DCI or MAC signaling.

In the above scheme, the identification processing unit is used to periodically detect a preset field in the DCI or MAC signaling according to the configured PRS transmission opportunity period and the number of PRS transmission opportunities in the PRS window, and obtain The PRS mapping information represented by the preset field; the PRS mapping information includes: the continuous sending time of the PRS, the number of base stations that send the PRS, and the number of occasions for sending the PRS; the subframe for sending the PRS is determined based on the PRS mapping information;

The receiving unit is configured to receive the PRS based on the subframe for sending the PRS determined by the processing unit.

In the above solution, the receiving unit is further configured to stop receiving the PRS based on the subframe determined by the processing unit in which the PRS is not sent.

The embodiments of the present invention provide a method for sending a positioning reference signal, a base station, and a terminal. On the one hand, when there is a positioning requirement, the first base station configures a positioning reference signal (PRS) window and PRS mapping information; the first base station sends control information carrying the PRS window and the PRS mapping information to the terminal. On the other hand, the terminal receives the control information of the first base station; and receives the PR based on the PRS window and PRS mapping information carried in the control information. In this way, using the technical solutions of the embodiments of the present invention, the terminal is triggered to receive the PRS in the corresponding subframe through the configured PRS window and the PRS mapping information, so as to realize the aperiodic transmission and reception of the PRS, thereby reducing the need for the terminal to receive signals. , reducing the power consumption of the terminal itself, which can prolong the battery life of the terminal (especially the NB-IOT terminal) and meet the node requirements of the terminal.

Description of drawings

1 is a schematic flowchart of a method for sending a positioning reference signal according to Embodiment 1 of the present invention;

2 is a schematic flowchart of a method for sending a positioning reference signal according to Embodiment 2 of the present invention;

3 is a schematic flowchart of a method for sending a positioning reference signal according to Embodiment 3 of the present invention;

4 is a schematic diagram of sending a PRS in a PRS window according to an embodiment of the present invention;

5 is a schematic diagram of a system architecture to which a method for sending a positioning reference signal according to an embodiment of the present invention is applied;

FIG. 6 is a schematic diagram of a composition structure of a base station according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a composition structure of a terminal according to an embodiment of the present invention.

Detailed ways

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

Example 1

An embodiment of the present invention provides a method for sending a Positioning Reference Signal (PRS). FIG. 1 is a schematic flowchart of a method for sending a positioning reference signal according to Embodiment 1 of the present invention; as shown in FIG. 1 , the method includes:

Step 101: When there is a positioning requirement, the first base station configures a PRS window and PRS mapping information.

Step 102: The first base station sends the control information carrying the PRS window and the PRS mapping information to the terminal.

In this embodiment, the control information may specifically be downlink control information (DCI, Downlink Control Information) signaling or media access control (MAC, Medium/Media Access Control) signaling; the DCI or the MAC signaling The PRS window and the PRS mapping information are carried, so that the terminal receives the PRS based on the received PRS window and the PRS mapping information in the DCI or MAC signaling.

In this embodiment, the first base station prepares to send a PRS to the terminal when there is a terminal positioning requirement. Wherein, the terminal positioning requirement may be a positioning requirement actively reported by the terminal, or may be a positioning requirement of the terminal actively acquired by the base station, or may be a positioning requirement sent by an application in the terminal. Specifically, the first base station configures a PRS window; wherein configuring the PRS window includes configuring the length of the PRS window; for example, the subframe length of the PRS window indicates that starting from a certain subframe, and consecutive M subframes are PRS windows, then The length of the PRS window is M frames. Specifically, the length of the PRS window may be pre-configured in the base station and the terminal before information exchange; or configured through a field in sending DCI or MAC signaling. The configuring the PRS window further includes configuring the number of PRS sending occasions in the PRS window; generally, one PRS window is configured with 1 to 3 PRS sending occasions. The first base station configures the first transmission opportunity of the PRS of the PRS window to transmit the PRS; the neighboring base stations of the first base station preferentially use the first transmission opportunity to transmit the PRS, and only when the first transmission opportunity is occupied, The neighboring base station sequentially selects other sending occasions other than the first sending occasion to send the PRS, that is, when the first sending occasion for sending the PRS in the PRS window is not occupied by other reference signals or channel transmission, the neighboring base station sends the PRS. Select the first transmission opportunity of the PRS in the PRS window to send the PRS; correspondingly, when the first transmission opportunity of the PRS in the PRS window is occupied by other reference signals or channel transmission, the neighboring base station selects the PRS The PRS is transmitted at the second transmission timing of the PRS or the third transmission timing of the PRS within the window. By adopting the above solution, it is convenient for the neighboring base station to obtain the transmission resources of the PRS.

In this embodiment, the first base station configures PRS mapping information, where the PRS mapping information is used to instruct the terminal to receive the PRS and to instruct the terminal to receive the PRS reception range. Specifically, the first base station configures the PRS mapping information, including: the first base station configures the subframe for starting to send the PRS, the continuous sending time of the PRS, the number of PRS sending opportunities, and the PRS sending occasion period. In this embodiment, the first base station can configure a fixed PRS sending timing period, based on this, the fixed PRS sending timing period can be pre-configured in the terminal, and there is no need to carry the representative PRS in the downlink transmission signaling information about the transmission timing period. For example, the configured PRS transmission timing period is 10 milliseconds (ms), the PRS continuous transmission time is 10 ms, and the number of PRS transmission timings is 3.

In step 102 in this embodiment, the first base station triggers the terminal to prepare to receive the PRS through DCI or MAC signaling. Specifically, the first base station sending DCI or MAC signaling to the terminal includes: the first base station sending DCI or MAC signaling to the terminal; a preset field in the DCI or MAC signaling represents the PRS mapping At least part of the PRS mapping information in the information; the at least part of the PRS mapping information includes: the continuous sending time of the PRS, the number of base stations that send the PRS, and the number of PRS sending occasions. Specifically, a preset field may be configured in the DCI or MAC signaling, and the preset field may be a PRS range (PRSregion) field; the PRS region field may include at least two parts, namely: PD field and ON field; wherein, the PD field represents the continuous transmission time of the PRS; the PD field may be composed of 3 bits. The ON field indicates the number of PRS transmission opportunities; the ON field may be composed of 2 bits.

By adopting the technical solutions of the embodiments of the present invention, the aperiodic transmission and reception of PRS is realized by using the configured PRS window and PRS mapping information and triggering the terminal to receive the PRS in the corresponding subframe through DCI or MAC signaling, thereby reducing the number of terminals in the terminal. Receiving unnecessary signals reduces the power consumption of the terminal itself, which can prolong the battery life of the terminal (especially the NB-IOT terminal) and meet the node requirements of the terminal.

Embodiment 2

The embodiment of the present invention also provides a method for sending a Positioning Reference Signal (PRS). FIG. 2 is a schematic flowchart of a method for sending a positioning reference signal according to Embodiment 2 of the present invention; as shown in FIG. 2 , the method includes:

Step 201: When there is a positioning requirement, the first base station notifies the neighboring base station of the PRS to be sent through X2 signaling.

In this embodiment, the first base station is a serving base station of the terminal; the neighboring base station is a base station of a neighboring cell of a cell corresponding to the first base station.

In this embodiment, when the first base station has a terminal positioning requirement, the first base station notifies other neighboring base stations through X2 signaling, and informs the other neighboring base stations that the first base station is to send a PRS. Wherein, the terminal positioning requirement may be a positioning requirement actively reported by the terminal, or may be a positioning requirement of the terminal actively acquired by the base station, or may be a positioning requirement sent by an application in the terminal. As one of the implementation manners, when the first base station notifies the neighboring base station to send the PRS through X2 signaling, the first base station also includes the starting subframe for sending the PRS, the continuous sending time of the PRS, the number of sending opportunities for the PRS, and the sending occasion period for the PRS. Wait for the PRS mapping information to be notified to the neighbor base station. Correspondingly, the first base station obtains the PRS to be sent by the neighboring base station through X2 signaling. As one of the implementation manners, the first base station obtains the PRS mapping information of the PRS to be sent by the neighboring base station through X2 signaling, and the PRS mapping information includes: the starting subframe for sending the PRS, the continuous sending time of the PRS, the PRS sending time The number of transmission timings and the transmission timing cycle of the PRS, etc. Based on this, the first base station and its neighboring base stations notify each other about the PRS to be sent, so that when the first base station sends DCI or MAC signaling, it carries the relevant PRS that other neighboring base stations also send PRS in the PRS window mapping information.

Step 202: The first base station configures a PRS window and PRS mapping information.

Here, the first base station configures the PRS window; wherein, configuring the PRS window includes configuring the length of the PRS window; for example, the subframe length of the PRS window indicates that starting from a certain subframe, and consecutive M subframes are PRS windows, then all The length of the PRS window is M subframes. Specifically, the length of the PRS window may be pre-configured in the base station and the terminal before information exchange; or configured through a field in sending DCI or MAC signaling. The configuring the PRS window further includes configuring the number of PRS sending occasions in the PRS window; generally, one PRS window is configured with 1 to 3 PRS sending occasions. However, the first base station configures the first transmission timing of the PRS in the PRS window to transmit the PRS, and after receiving the X2 signaling, the neighboring base stations of the first base station preferentially use the first transmission timing in the X2 signaling to transmit the PRS. PRS, only when the first sending opportunity is occupied, the neighboring base station selects other sending occasions other than the first sending occasion to send the PRS in sequence, that is, the first sending occasion for sending the PRS in the PRS window is not When occupied by other reference signals or channel transmission, the neighboring base station selects the first transmission opportunity of the PRS in the PRS window to send the PRS; correspondingly, when the first transmission opportunity of the PRS in the PRS window is used by other reference signals Or when the channel transmission is occupied, the neighboring base station selects the second PRS sending occasion or the third PRS sending occasion in the PRS window to send the PRS. By adopting the above solution, it is convenient for the neighboring base station to obtain the transmission resources of the PRS.

In this embodiment, the first base station configures PRS mapping information, where the PRS mapping information is used to instruct the terminal to receive the PRS and to instruct the terminal to receive the PRS reception range. Specifically, the first base station configures the PRS mapping information, including: the first base station configures the subframe for starting to send the PRS, the continuous sending time of the PRS, the number of base stations that send the PRS, the number of PRS sending opportunities, and the PRS sending occasions cycle. In this embodiment, the first base station can configure a fixed PRS sending timing period, based on this, the fixed PRS sending timing period can be pre-configured in the terminal, and there is no need to carry the representative PRS in the downlink transmission signaling information about the transmission timing period. For example, the configured PRS transmission timing period is 10 milliseconds (ms), the PRS continuous transmission time is 10 ms, and the number of PRS transmission timings is 3.

In this embodiment, the configuration of the PRS window and the PRS mapping information by the first base station in step 201 is not limited to be performed before or after the first base station configures the PRS window and the PRS mapping information.

Step 203: The first base station sends DCI or MAC signaling to the terminal; the DCI or the MAC signaling carries the PRS window and the PRS mapping information, so that the terminal can base on the received The PRS window and the PRS mapping information in the DCI or MAC signaling receive the PRS.

In step 203 of this embodiment, the first base station triggers the terminal to prepare to receive the PRS through DCI or MAC signaling. Specifically, the first base station sending DCI or MAC signaling to the terminal includes: the first base station sending DCI or MAC signaling to the terminal; a preset field in the DCI or MAC signaling represents the PRS mapping At least part of the PRS mapping information in the information; the at least part of the PRS mapping information includes: the continuous sending time of the PRS, the number of base stations that send the PRS, and the number of PRS sending occasions. Specifically, a preset field may be configured in the DCI or MAC signaling, and the preset field may be a PRS range (PRSregion) field; the PRS region field may include three parts, namely: PD field, PeNBN field and ON field; wherein, the PD field represents the continuous transmission time of the PRS; the PD field may be composed of 3 bits. The PeNBN field indicates the number of base stations sending PRS; the PeNBN field may be composed of 3 bits. The ON field indicates the number of PRS transmission opportunities; the ON field may be composed of 2 bits. For example, the PRS region field may be represented as 11101010, wherein the first three bits represent the PD field, the middle three bits represent the PeNBN field, and the last two bits represent the ON field. The PRS region field indicates that the continuous transmission time of the PRS is 7 subframes, and there are PRSs sent by two base stations in the subframes; and there are two PRS transmission opportunities in the PRS window.

By adopting the technical solutions of the embodiments of the present invention, the aperiodic transmission and reception of PRS is realized by using the configured PRS window and PRS mapping information and triggering the terminal to receive the PRS in the corresponding subframe through DCI or MAC signaling, thereby reducing the number of terminals in the terminal. Receiving unnecessary signals reduces the power consumption of the terminal itself, which can prolong the battery life of the terminal (especially the NB-IOT terminal) and meet the node requirements of the terminal.

Embodiment 3

The embodiment of the present invention also provides a method for sending a Positioning Reference Signal (PRS). FIG. 3 is a schematic flowchart of a method for sending a positioning reference signal according to Embodiment 3 of the present invention; as shown in FIG. 3 , the method includes:

Step 301: The terminal receives control information of the first base station.

Step 302: The terminal receives the PRS based on the PRS window and the PRS mapping information carried in the control information.

In this embodiment, the control information may specifically be DCI or MAC signaling. Then, the terminal receiving the control information of the first base station includes: the terminal receiving the DCI or MAC signaling of the first base station; correspondingly, the receiving the PRS based on the PRS window and the PRS mapping information carried in the control information, The method includes: receiving the PRS based on the PRS window and PRS mapping information carried in the DCI or MAC signaling.

Specifically, the receiving the PRS based on the PRS window and the PRS mapping information carried in the DCI or MAC signaling includes: the terminal according to the configured PRS sending occasion period and the number of PRS sending occasions in the PRS window , Periodically detect the preset field in the DCI or MAC signaling, and obtain the PRS mapping information represented by the preset field; the PRS mapping information includes: the continuous sending time of the PRS, the number of base stations sending the PRS, the number of the base stations sending the PRS, and the PRS mapping information. The terminal determines the subframe for sending the PRS based on the PRS mapping information, and receives the PRS based on the subframe for sending the PRS.

In this embodiment, the PRS transmission timing period may be pre-configured in the terminal, and the PRS transmission timing period may be fixedly configured, that is, the PRS transmission timing period is fixed each time the PRS is transmitted.

Specifically, identifying the PRS window in the DCI or MAC signaling by the terminal may specifically be identifying the length of the PRS window. For example, if the length of the PRS window is M frames, it means that starting from the starting subframe, M consecutive subframes are PRS windows.

Specifically, a preset field is configured in the DCI or MAC signaling. As an implementation manner, the preset field may be a PRS range (PRS region) field; the PRS region field may include at least two parts, They are: the PD field and the ON field respectively; wherein, the PD field represents the continuous transmission time of the PRS; the PD field may be composed of 3 bits. The ON field indicates the number of PRS transmission opportunities; the ON field may be composed of 2 bits. For example, the PRS region field may be represented as 11110, wherein the first three bits represent the PD field, and the last two bits represent the ON field. Then, the PRSregion field indicates that the continuous transmission time of the PRS is 7 subframes, and there are two transmission occasions of the PRS in the PRS window. Then when the terminal detects the above-mentioned PRS region field and identifies the PRS mapping information in the field, it indicates that starting from the subframe where the PRSregion field is located, 7 consecutive subframes are PRS subframes; and from the location where the PRS region field is located. The subframe starts, and the continuous M subframes are the PRS window; the PRS region field is periodically detected according to the PRS transmission timing period, and the number of detections is 2 times (that is, it satisfies the transmission timing of two PRSs in the PRS window); thus, all The terminal may determine the subframe in which the base station transmits the PRS, so as to start receiving the PRS in the subframe in which the PRS is transmitted.

As another implementation manner, the preset field may be a PRS region (PRS region) field; the PRSregion field may include three parts, namely: a PD field, a PeNBN field, and an ON field; wherein, the PD field Indicates the continuous transmission time of the PRS; the PD field may consist of 3 bits. The PeNBN field indicates the number of base stations sending PRS; the PeNBN field may be composed of 3 bits. The ON field indicates the number of PRS transmission opportunities; the ON field may be composed of 2 bits. For example, the PRS region field may be represented as 11101010, wherein the first three bits represent the PD field, the middle three bits represent the PeNBN field, and the last two bits represent the ON field. The PRS region field indicates that the continuous transmission time of the PRS is 7 subframes, and there are PRSs sent by two base stations in the subframes; and there are two PRS transmission opportunities in the PRS window. Then when the terminal detects the above-mentioned PRS region field and identifies the PRS mapping information in the field, it indicates that starting from the subframe where the PRS region field is located, 7 consecutive subframes are PRS subframes; and from the PRS region field Starting from the subframe where it is located, the continuous M subframes are the PRS window; the PRSregion field is periodically detected according to the transmission opportunity period of the PRS, and the number of detections is 2 times (that is, the transmission opportunities of two PRSs in the PRS window are satisfied); and according to the PeNBN field The indicated number of base stations sending PRS is 2, and the terminal may determine the base station information of the received PRS through the mapping position of the sequence of the PRS.

FIG. 4 is a schematic diagram of sending PRS in a PRS window according to an embodiment of the present invention; as shown in FIG. 4 , there are three PRS sending occasions in one PRS window; the PRS lasts for 6 subframes in each PRS sending occasion.

The method further includes: after determining the subframe in which the PRS is not to be transmitted, stopping receiving the PRS.

In this embodiment, the terminal may determine a subframe for sending PRS based on a preset field in DCI or MAC signaling, and correspondingly, may also determine a subframe for not sending PRS; based on this, in this embodiment, the terminal determines Subframes that do not transmit PRS stop receiving PRS. In this way, the terminal can reduce receiving unnecessary signals, reduce the power consumption of the terminal itself, prolong the battery usage time of the terminal (especially the NB-IOT terminal), and meet the node requirements of the terminal.

FIG. 5 is a schematic diagram of a system architecture to which the method for sending a positioning reference signal according to an embodiment of the present invention is applied; as shown in FIG. 5 , the system architecture includes a terminal 42 and a base station 41; the terminal 42 may specifically be a narrowband Internet of Things ( NB-IOT) terminal. The terminal 42 and the base station 41 can communicate through a wireless network.

Of course, the example in FIG. 5 is only an example of a system architecture for implementing the embodiment of the present invention, and the embodiment of the present invention is not limited to the system structure described in FIG. 5 above. Based on the system architecture, various embodiments of the present invention are proposed.

Embodiment 4

The embodiment of the present invention also provides a base station. FIG. 6 is a schematic diagram of the composition and structure of a base station according to an embodiment of the present invention; as shown in FIG. 6 , the base station includes: a configuration unit 411 and a sending unit 412; wherein,

The configuration unit 411 is configured to configure the PRS window and the PRS mapping information when there is a positioning requirement;

The sending unit 412 is configured to send the control information carrying the PRS window and the PRS mapping information to the terminal.

In this embodiment, the sending unit 412 is configured to send DCI or MAC signaling to the terminal; the DCI or the MAC signaling carries the PRS window and the PRS mapping information configured by the configuration unit 411 to The terminal is made to receive the PRS based on the received PRS window in the DCI or MAC signaling and the PRS mapping information.

In this embodiment, the first base station prepares to send a PRS to the terminal when there is a terminal positioning requirement. Wherein, the terminal positioning requirement may be a positioning requirement actively reported by the terminal, or may be a positioning requirement of the terminal actively acquired by the base station, or may be a positioning requirement sent by an application in the terminal. Specifically, the configuration unit 411 configures a PRS window; wherein, the configuration unit 411 is configured to configure the length of the PRS window and the number of opportunities for sending PRS in the PRS window; and is also configured to configure the PRS window in the PRS window. The PRS is sent at the first sending opportunity of the PRS; so that the neighboring base station preferentially uses the first sending occasion to send the PRS, and only when the first sending occasion is occupied, the neighboring base station selects other than the first sending occasion in order The PRS is sent at the sending timing. Wherein, configuring the PRS window includes configuring the length of the PRS window; for example, the subframe length of the PRS window indicates that starting from a certain subframe, M consecutive subframes are PRS windows, and the length of the PRS window is M frames. Specifically, the length of the PRS window may be pre-configured in the base station and the terminal before information exchange; or configured through a field in sending DCI or MAC signaling. The configuring the PRS window further includes configuring the number of PRS sending occasions in the PRS window; generally, one PRS window is configured with 1 to 3 PRS sending occasions. However, the first base station configures the first transmission opportunity of the PRS of the PRS window to transmit the PRS, and the neighboring base stations of the first base station preferentially use the first transmission opportunity to transmit the PRS, and only when the first transmission opportunity is occupied, The neighboring base station sequentially selects other sending occasions other than the first sending occasion to send the PRS, that is, when the first sending occasion for sending the PRS in the PRS window is not occupied by other reference signals or channel transmission, the neighboring base station sends the PRS. Select the first transmission opportunity of the PRS in the PRS window to send the PRS; correspondingly, when the first transmission opportunity of the PRS in the PRS window is occupied by other reference signals or channel transmission, the neighboring base station selects the PRS The PRS is transmitted at the second transmission timing of the PRS or the third transmission timing of the PRS within the window. By adopting the above solution, it is convenient for the neighboring base station to obtain the transmission resources of the PRS.

In this embodiment, the configuration unit 411 configures PRS mapping information, where the PRS mapping information is used to instruct the terminal to receive the PRS and to instruct the terminal to receive the PRS reception range. Specifically, the configuration unit 411 is configured to configure the continuous sending time of the PRS, the number of base stations that send the PRS, the number of PRS sending occasions, and the period of the PRS sending occasions. In this embodiment, the configuration unit 411 can configure a fixed PRS sending timing period, based on this, the fixed PRS sending timing period can be pre-configured in the terminal, and there is no need to carry the representative PRS in the downlink transmission signaling information about the transmission timing period. For example, the configured PRS transmission timing period is 10 milliseconds (ms), the PRS continuous transmission time is 10 ms, and the number of PRS transmission timings is 3.

In this embodiment, the sending unit 412 triggers the terminal to prepare to receive the PRS through DCI or MAC signaling. Specifically, the sending unit 412 is configured to send DCI or MAC signaling to the terminal; a preset field in the DCI or MAC signaling represents at least part of the PRS mapping information in the PRS mapping information; the at least part of the PRS mapping information The PRS mapping information includes: the continuous sending time of the PRS and the number of occasions for sending the PRS. Specifically, a preset field may be configured in the DCI or MAC signaling, and the preset field may be a PRS range (PRS region) field; the PRS region field may include at least two parts, namely: the PD field and the ON field; wherein, the PD field represents the continuous transmission time of the PRS; the PD field may be composed of 3 bits. The ON field indicates the number of PRS transmission opportunities; the ON field may be composed of 2 bits.

Those skilled in the art should understand that the functions of each processing unit in the base station in the embodiment of the present invention can be understood with reference to the foregoing description of the method for sending a positioning reference signal. The functions described in the embodiments of the present invention are implemented by an analog circuit, and may also be implemented by running software that executes the functions described in the embodiments of the present invention on an intelligent terminal.

Embodiment 5

The embodiment of the present invention also provides a base station. The base station may be as shown in FIG. 6, the base station includes: a configuration unit 411 and a sending unit 412; wherein,

The sending unit 412 is used to notify the neighboring base station of the PRS to be sent through X2 signaling when there is a positioning requirement; wherein, the X2 signaling includes the subframe for starting to send the PRS, the continuous sending time of the PRS, and the sending opportunity of the PRS. Quantity and PRS sending timing period;

The configuration unit 411 is used to configure the PRS window and PRS mapping information;

The sending unit 412 is further configured to send DCI or MAC signaling to the terminal; the DCI or the MAC signaling carries the PRS window configured by the configuration unit 411 and the PRS mapping information, so that the terminal The PRS is received based on the received PRS window in the DCI or MAC signaling and the PRS mapping information.

In this embodiment, when the first base station has a terminal positioning requirement, the sending unit 412 notifies other neighboring base stations through X2 signaling, notifying the other neighboring base stations that the first base station is to send a PRS. Wherein, the terminal positioning requirement may be a positioning requirement actively reported by the terminal, or may be a positioning requirement of the terminal actively acquired by the base station, or may be a positioning requirement sent by an application in the terminal. As one of the implementation manners, when the sending unit 412 notifies the neighboring base station to send the PRS through X2 signaling, the sending unit 412 also includes the starting subframe for sending the PRS, the continuous sending time of the PRS, the number of sending opportunities for the PRS, and the sending occasion period for the PRS. Wait for the PRS mapping information to be notified to the neighbor base station. Correspondingly, the sending unit 412 obtains the PRS to be sent by the neighboring base station through X2 signaling. As one of the implementation manners, the sending unit 412 obtains the PRS mapping information of the PRS to be sent by the neighboring base station through X2 signaling, and the PRS mapping information includes: the starting subframe for sending the PRS, the continuous sending time of the PRS, the PRS sending time, and the PRS sending time. The number of transmission timings and the transmission timing cycle of the PRS, etc. Based on this, the first base station and its neighboring base stations notify each other about the PRS to be sent, so that when the sending unit 412 of the first base station sends the DCI or MAC signaling, it carries the information sent by other neighboring base stations in the PRS window. Related PRS mapping information of the PRS.

Here, the configuration unit 411 configures the PRS window; the configuration unit 411 is used to configure the length of the PRS window and the number of occasions for sending PRS in the PRS window; and is also used to configure the first PRS in the PRS window. One sending opportunity to send PRS; so that the neighboring base station preferentially uses the first sending occasion to send PRS, and only when the first sending occasion is occupied, the neighboring base station sequentially selects other sending occasions other than the first sending occasion to send PRS. Wherein, configuring the PRS window includes configuring the length of the PRS window; for example, the subframe length of the PRS window indicates that starting from a certain subframe, M consecutive subframes are PRS windows, and the length of the PRS window is M subframes. Specifically, the length of the PRS window may be pre-configured in the base station and the terminal before information exchange; or configured through a field in sending DCI or MAC signaling. The configuring the PRS window further includes configuring the number of PRS sending occasions in the PRS window; generally, one PRS window is configured with 1 to 3 PRS sending occasions. The first base station configures the first transmission timing of the PRS in the PRS window to preferentially transmit the PRS. After receiving the X2 signaling, the neighboring base stations of the first base station preferentially use the first transmission timing in the X2 signaling. Sending PRS, only when the first sending opportunity is occupied, the neighboring base station selects other sending occasions other than the first sending occasion in order to send the PRS, that is, the first sending occasion for sending the PRS in the PRS window When not occupied by other reference signals or channel transmissions, the neighboring base station selects the first transmission opportunity of the PRS in the PRS window to send the PRS; correspondingly, when the first transmission opportunity of the PRS in the PRS window is referenced by other When the signal or channel transmission is occupied, the neighboring base station selects the second transmission opportunity of the PRS or the third transmission opportunity of the PRS in the PRS window to transmit the PRS. By adopting the above solution, it is convenient for the neighboring base station to obtain the transmission resources of the PRS.

In this embodiment, the configuration unit 411 configures PRS mapping information, where the PRS mapping information is used to instruct the terminal to receive the PRS and to instruct the terminal to receive the PRS reception range. Specifically, the configuration unit 411 is configured to configure the continuous sending time of the PRS, the number of base stations that send the PRS, the number of PRS sending occasions, and the period of the PRS sending occasions. In this embodiment, the configuration unit 411 can configure a fixed PRS sending timing period, based on this, the fixed PRS sending timing period can be pre-configured in the terminal, and there is no need to carry the representative PRS in the downlink transmission signaling information about the transmission timing period. For example, the configured PRS transmission timing period is 10 milliseconds (ms), the PRS continuous transmission time is 10 ms, and the number of PRS transmission timings is 3.

In this embodiment, the sending unit 412 triggers the terminal to prepare to receive the PRS through DCI or MAC signaling. Specifically, the sending unit 412 is configured to send DCI or MAC signaling to the terminal; a preset field in the DCI or MAC signaling represents at least part of the PRS mapping information in the PRS mapping information; the at least part of the PRS mapping information The PRS mapping information includes: the continuous sending time of the PRS, the number of base stations that send the PRS, and the number of occasions for sending the PRS. Specifically, a preset field may be configured in the DCI or MAC signaling, and the preset field may be a PRS region (PRS region) field; the PRS region field may include three parts, namely: PD field, PeNBN field and ON field; wherein, the PD field represents the continuous transmission time of the PRS; the PD field may be composed of 3 bits. The PeNBN field indicates the number of base stations sending PRS; the PeNBN field may be composed of 3 bits. The ON field indicates the number of PRS transmission opportunities; the ON field may be composed of 2 bits. For example, the PRS region field may be represented as 11101010, wherein the first three bits represent the PD field, the middle three bits represent the PeNBN field, and the last two bits represent the ON field. The PRS region field indicates that the continuous transmission time of the PRS is 7 subframes, and there are PRSs sent by two base stations in the subframes; and there are two PRS transmission opportunities in the PRS window.

Those skilled in the art should understand that the functions of each processing unit in the base station in the embodiment of the present invention can be understood with reference to the foregoing description of the method for sending a positioning reference signal. The functions described in the embodiments of the present invention are implemented by an analog circuit, and may also be implemented by running software that executes the functions described in the embodiments of the present invention on an intelligent terminal.

In Embodiment 4 and Embodiment 5 of the present invention, the configuration unit 411 in the base station can be, in practical applications, a central processing unit (CPU, Central Processing Unit), a digital signal processor (DSP, Digital) in the base station Signal Processor) or Field-Programmable Gate Array (FPGA, Field-Programmable Gate Array); the transmitting unit 412 in the base station can be implemented by the transmitting antenna in the base station in practical applications.

Embodiment 6

The embodiment of the present invention also provides a terminal. FIG. 7 is a schematic diagram of the composition structure of a terminal according to an embodiment of the present invention; as shown in FIG. 7 , the terminal includes: a receiving unit 421 and an identification processing unit 422; wherein,

The receiving unit 421 is configured to receive the control information of the first base station; it is also configured to receive the PRS based on the identification processing result of the PRS window and the PRS mapping information carried in the control information by the identification processing unit 422;

The identification processing unit 422 is configured to perform identification processing on the PRS window and the PRS mapping information carried in the control information.

In this embodiment, the receiving unit 421 is configured to receive the DCI or MAC signaling of the first base station; and is also configured to map the PRS window and the PRS carried in the DCI or MAC signaling based on the identification processing unit 422 Receive the PRS as a result of the identification and processing of the information;

The identification processing unit 422 is configured to perform identification processing on the PRS window and PRS mapping information carried in the DCI or MAC signaling.

In this embodiment, the identification processing unit 422 is configured to periodically detect a preset field in the DCI or MAC signaling according to the configured PRS transmission opportunity period and the number of PRS transmission opportunities in the PRS window. , obtain the PRS mapping information represented by the preset field; the PRS mapping information includes: the continuous transmission time of the PRS, the number of base stations sending the PRS, and the number of occasions for sending the PRS; determining the subframe for sending the PRS based on the PRS mapping information ;

The receiving unit 421 is configured to receive the PRS based on the subframe for sending the PRS determined by the processing unit.

In this embodiment, the PRS transmission timing period may be pre-configured in the terminal, and the PRS transmission timing period may be fixedly configured, that is, the PRS transmission timing period is fixed each time the PRS is transmitted.

Specifically, the identifying processing unit 422 identifies the PRS window in the DCI or MAC signaling, which may specifically be identifying the length of the PRS window. For example, if the length of the PRS window is M frames, it means that starting from the starting subframe, M consecutive subframes are PRS windows.

Specifically, a preset field is configured in the DCI or MAC signaling. As an implementation manner, the preset field may be a PRS range (PRS region) field; the PRS region field may include at least two parts, They are: the PD field and the ON field respectively; wherein, the PD field represents the continuous transmission time of the PRS; the PD field may be composed of 3 bits. The ON field represents the number of PRS transmission opportunities; the ON field may be composed of 2 bits. For example, the PRS region field may be represented as 11110, wherein the first three bits represent the PD field, and the last two bits represent the ON field. Then, the PRSregion field indicates that the continuous transmission time of the PRS is 7 subframes, and there are two transmission occasions of the PRS in the PRS window. Then, when the identification processing unit 422 detects the above-mentioned PRS region field and identifies the PRS mapping information in the field, it indicates that starting from the subframe where the PRS region field is located, 7 consecutive subframes are PRS subframes; and The subframe where the PRS region field is located starts, and the continuous M subframes are the PRS window; the PRS region field is periodically detected according to the PRS transmission timing period, and the number of detections is 2 times (that is, it satisfies the transmission timing of two PRSs in the PRS window); Therefore, the identification processing unit 422 can determine the subframe in which the base station transmits the PRS, so as to start receiving the PRS in the subframe in which the PRS is transmitted.

As another implementation manner, the preset field may be a PRS region (PRS region) field; the PRSregion field may include three parts, namely: a PD field, a PeNBN field, and an ON field; wherein, the PD field Indicates the continuous transmission time of the PRS; the PD field may consist of 3 bits. The PeNBN field indicates the number of base stations sending PRS; the PeNBN field may be composed of 3 bits. The ON field indicates the number of PRS transmission opportunities; the ON field may be composed of 2 bits. For example, the PRS region field may be represented as 11101010, wherein the first three bits represent the PD field, the middle three bits represent the PeNBN field, and the last two bits represent the ON field. The PRS region field indicates that the continuous transmission time of the PRS is 7 subframes, and there are PRSs sent by two base stations in the subframes; and there are two PRS transmission opportunities in the PRS window. Then, when the identification processing unit 422 detects the above-mentioned PRS region field and identifies the PRS mapping information in the field, it indicates that starting from the subframe where the PRS region field is located, 7 consecutive subframes are PRS subframes; and The subframe where the PRS region field is located starts, and the continuous M subframes are the PRS window; the PRS region field is periodically detected according to the PRS transmission timing period, and the number of detections is 2 times (that is, it satisfies the transmission timing of two PRSs in the PRS window); And according to the number of base stations that transmit the PRS indicated by the PeNBN field, the identifying unit 422 may determine the base station information of the received PRS through the mapping position of the sequence of the PRS.

In this embodiment, as another implementation manner, the receiving unit 421 is further configured to stop receiving the PRS after the subframe determined by the processing unit in which the PRS is not to be sent.

In this embodiment, the identification processing unit 422 may determine a subframe for sending PRS based on a preset field in DCI or MAC signaling, and correspondingly, may also determine a subframe for not sending PRS; based on this, in this embodiment , the identification processing unit 422 determines that the subframe in which the PRS is not to be transmitted enables the receiving unit 421 to stop receiving the PRS. In this way, the terminal can reduce receiving unnecessary signals, reduce the power consumption of the terminal itself, prolong the battery usage time of the terminal (especially the NB-IOT terminal), and meet the node requirements of the terminal.

Those skilled in the art should understand that the functions of each processing unit in the terminal in the embodiment of the present invention can be understood with reference to the foregoing description of the method for sending a positioning reference signal. The functions described in the embodiments of the present invention are implemented by an analog circuit, and may also be implemented by running software that executes the functions described in the embodiments of the present invention on an intelligent terminal.

In this embodiment of the present invention, the identification processing unit 422 in the terminal can be implemented by a CPU, DSP or FPGA in the terminal in practical applications; the receiving unit 421 in the terminal can be implemented by the The receive antenna in the terminal is implemented.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored, or not implemented. In addition, the coupling, or direct coupling, or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical or other forms. of.

The unit described above as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place or 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 in this embodiment.

In addition, each functional unit in each embodiment of the present invention may all be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integration The unit can be implemented either in the form of hardware or in the form of hardware plus software functional units.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by program instructions related to hardware, the aforementioned program can be stored in a computer-readable storage medium, and when the program is executed, execute Including the steps of the above-mentioned method embodiment; and the aforementioned storage medium includes: a mobile storage device, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk and other various A medium on which program code can be stored.

Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software function module and sold or used as an independent product, it may also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present invention may be embodied in the form of software products in essence or the parts that make contributions to the prior art. The computer software products are stored in a storage medium and include several instructions for A computer device (which may be a personal computer, a server, or a network device, etc.) is caused to execute all or part of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic disk or an optical disk and other mediums that can store program codes.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (20)

1. A method for transmitting a positioning reference signal, the method comprising:

when positioning requirements exist, a first base station configures a Positioning Reference Signal (PRS) window and PRS mapping information;

and the first base station sends control information carrying the PRS window and the PRS mapping information to a terminal.

2. The method of claim 1, wherein the first base station sends control information carrying the PRS window and the PRS mapping information to a terminal, and wherein the sending comprises:

the first base station sends downlink control information DCI or media access control MAC signaling to a terminal; the DCI or the MAC signaling carries the PRS window and the PRS mapping information.

3. The method of claim 1, wherein before the first base station sends control information carrying the PRS window and the PRS mapping information to a terminal, the method further comprises: the first base station informs an adjacent base station of PRS to be sent through X2 signaling; wherein, the X2 signaling includes a starting transmission subframe of the PRS, a continuous transmission time of the PRS, a number of transmission occasions of the PRS, and a transmission occasion period of the PRS.

4. The method of claim 3, wherein the first base station configures PRS mapping information, comprising: the first base station configures the continuous sending time of the PRS, the number of base stations sending the PRS, the number of sending occasions of the PRS and the sending occasion period of the PRS.

5. The method of claim 3, wherein the first base station configures a PRS window comprising: the first base station configures the length of a PRS window and the number of occasions for sending PRS in the PRS window;

the first base station configures a first transmission opportunity of the PRS in the PRS window to transmit the PRS; after receiving the X2 signaling, the adjacent base station preferentially adopts the first sending opportunity in the X2 signaling to send the PRS, and only when the first sending opportunity is occupied, the adjacent base station sequentially selects other sending opportunities except the first sending opportunity to send the PRS.

6. The method of claim 2, wherein the first base station sends DCI or MAC signaling to the terminal, and wherein the DCI or MAC signaling comprises:

the first base station sends DCI or MAC signaling to a terminal; a preset field in the DCI or the MAC signaling represents at least part of PRS mapping information in the PRS mapping information; the at least partial PRS mapping information comprises: the continuous sending time of PRS, the number of base stations sending PRS and the number of occasions sending PRS.

7. A method for transmitting a positioning reference signal, the method comprising:

a terminal receives control information of a first base station;

and receiving the PRS based on the PRS window and the PRS mapping information carried in the control information.

8. The method of claim 7, wherein the terminal receives control information of the first base station, and wherein the method comprises: the terminal receives DCI or MAC signaling of a first base station;

correspondingly, the receiving PRS based on the PRS window and the PRS mapping information carried in the control information includes: and receiving the PRS based on the PRS window and the PRS mapping information carried in the DCI or the MAC signaling.

9. The method of claim 8, wherein the receiving PRS based on PRS window and PRS mapping information carried in the DCI or MAC signaling comprises:

the terminal periodically detects a preset field in the DCI or the MAC signaling according to the configured sending opportunity period of the PRS and the sending opportunity number of the PRS in the PRS window to obtain PRS mapping information represented by the preset field; the PRS mapping information includes: the continuous sending time of the PRS, the number of base stations sending the PRS and the number of occasions sending the PRS;

and the terminal determines a subframe for sending the PRS based on the PRS mapping information and receives the PRS based on the subframe for sending the PRS.

10. The method of claim 9, further comprising: and stopping receiving the PRS after determining the subframe which does not transmit the PRS.

11. A base station, characterized in that the base station comprises: a configuration unit and a transmission unit; wherein,

the configuration unit is configured to configure a Positioning Reference Signal (PRS) window and PRS mapping information when a positioning requirement exists;

and the sending unit is used for sending control information carrying the PRS window and the PRS mapping information to a terminal.

12. The base station of claim 11, wherein the sending unit is configured to send downlink control information DCI or media access control MAC signaling to a terminal; the DCI or the MAC signaling carries the PRS window configured by the configuration unit and the PRS mapping information.

13. The base station of claim 11, wherein the sending unit is further configured to notify, before sending the control information carrying the PRS window and the PRS mapping information to the terminal, an adjacent base station of the PRS to be sent through an X2 signaling; wherein, the X2 signaling includes a starting transmission subframe of the PRS, a continuous transmission time of the PRS, a number of transmission occasions of the PRS, and a transmission occasion period of the PRS.

14. The base station of claim 13, wherein the configuring unit is configured to configure a continuous transmission time of PRS, a number of base stations transmitting PRS, a number of transmission occasions of PRS, and a transmission occasion period of PRS.

15. The base station of claim 13, wherein the configuring unit is configured to configure a length of a PRS window and a number of occasions for sending PRSs within the PRS window; further configured to configure a PRS within the PRS window for a first transmission occasion to transmit a PRS; after receiving the X2 signaling, the adjacent base station preferentially adopts the first sending opportunity in the X2 signaling to send the PRS, and only when the first sending opportunity is occupied, the adjacent base station sequentially selects other sending opportunities except the first sending opportunity to send the PRS.

16. The base station of claim 12, wherein the transmitting unit is configured to transmit DCI or MAC signaling to a terminal; a preset field in the DCI or the MAC signaling represents at least part of PRS mapping information in the PRS mapping information; the at least partial PRS mapping information comprises: the continuous sending time of PRS, the number of base stations sending PRS and the number of occasions sending PRS.

17. A terminal, characterized in that the terminal comprises: a receiving unit and an identification processing unit; wherein,

the receiving unit is used for receiving control information of the first base station; the PRS processing unit is also used for receiving a PRS based on the identification processing result of the PRS window and the PRS mapping information carried in the control information;

and the identification processing unit is used for identifying and processing the PRS window and the PRS mapping information carried in the control information.

18. The terminal of claim 17, wherein the receiving unit is configured to receive DCI or MAC signaling of the first base station; the PRS is received based on the recognition processing result of the recognition processing unit on the PRS window and the PRS mapping information carried in the DCI or the MAC signaling;

and the identification processing unit is configured to perform identification processing on the PRS window and PRS mapping information carried in the DCI or the MAC signaling.

19. The terminal of claim 18, wherein the identification processing unit is configured to detect a preset field in the DCI or the MAC signaling periodically according to a transmission opportunity period of a configured PRS and a transmission opportunity number of the PRS in the PRS window, and obtain PRS mapping information represented by the preset field; the PRS mapping information includes: the continuous sending time of the PRS, the number of base stations sending the PRS and the number of occasions sending the PRS; determining a subframe for transmitting a PRS based on the PRS mapping information;

the receiving unit is configured to receive the PRS based on the subframe, determined by the processing unit, for transmitting the PRS.

20. The terminal of claim 19, wherein the receiving unit is further configured to stop receiving PRS after the subframe not transmitting PRS determined by the processing unit.

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