WO2017063121A1

WO2017063121A1 - Method and apparatus for sending positioning reference signal

Info

Publication number: WO2017063121A1
Application number: PCT/CN2015/091755
Authority: WO
Inventors: 尚春庆
Original assignee: 华为技术有限公司
Priority date: 2015-10-12
Filing date: 2015-10-12
Publication date: 2017-04-20
Also published as: CN108029090A

Abstract

The present invention provides a method and apparatus for sending a positioning reference signal. The method comprises: a scheduling center allocates different PRS transmitting frequency domain sub-bands for a plurality of RRUs within a scheduling range separately; and notify the corresponding RRU of the PRS transmitting frequency domain sub-band allocated for each RRU, such that each RRU transmits a PRS in the PRS transmitting frequency domain sub-band allocated by the scheduling center. The interference avoiding mode is simple and easy to implement, a fault is easy to locate and maintain, and the allocation efficiency is high.

Description

Positioning reference signal transmitting method and device

Technical field

The present invention relates to a wireless communication technology, and in particular, to a method and an apparatus for transmitting a positioning reference signal.

Background technique

With the continuous penetration of Long Term Evolution (LTE) coverage, the positioning of terminals in narrow streets and large closed halls has also been continuously improved. At present, the LTE technology supports the positioning of the terminal by observing the Observed Time Difference of Arrival (OTDOA). Specifically, the terminal receives a positioning reference signal (Positioning Reference Signal, PRS for short) sent by a plurality of base stations, calculates a time difference of arrival of the PRSs sent by the multiple base stations, and reports the difference to the positioning center, and the positioning center calculates the hyperbolic method. The location of the terminal. However, if multiple base stations transmit PRSs in the same time domain, they also have mutual interference.

In the prior art, in order to avoid interference between PRSs sent by multiple base stations, multiple base stations are configured to transmit PRSs in different time domains, that is, by staggering the time domain to ensure that the terminals can demodulate different base stations in different time domains. PRS, so that PRS sent by different base stations does not interfere with each other.

However, when the PRS is transmitted by using the prior art, multiple base stations, terminals, and the core network must be configured at the same time, so that the network elements can be scheduled synchronously. Therefore, the configuration process is complicated, the efficiency is low, and the signaling overhead is large.

Summary of the invention

The embodiment of the invention provides a method and a device for transmitting a positioning reference signal, which are used to solve the problem that the PRS configuration process in the prior art is complicated, inefficient, and brings a large signaling overhead.

A first aspect of the present invention provides a method for transmitting a positioning reference signal, including:

The scheduling center allocates different positioning reference signal PRS transmission frequency domain sub-segments for the plurality of radio remote units RRU in the scheduling range;

The scheduling center notifies the corresponding RRUs of the PRS transmission frequency domain sub-segments allocated to each RRU, so that each RRU transmits the PRS transmission frequency domain sub-segments allocated by the scheduling center. PRS.

In conjunction with the first aspect, in a first possible implementation of the first aspect, the plurality of RRUs within the scheduling range transmit PRSs at the same time.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the scheduling center allocates different PRS transmission frequencies to multiple RRUs in a scheduling range Domain subsections, including:

The scheduling center divides the current PRS available frequency band into N frequency domain sub-sections, where N is a positive integer and N is greater than or equal to 1;

The scheduling center sequentially scans the N frequency domain sub-segments to obtain occupation information of the N frequency domain sub-segments;

The scheduling center allocates different PRS transmission frequency domain sub-segments in the N frequency domain sub-segments for the multiple RRUs in the scheduling range according to the occupancy information of the N frequency domain sub-segments.

With reference to any one of the first aspect to the second possible implementation manner of the first aspect, in the third possible implementation manner of the first aspect, if the multiple RRUs belong to the same baseband processing unit BBU, The scheduling center is the BBU.

With reference to the first aspect to any one of the second possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, if the multiple RRUs belong to the same BBU cloud, the scheduling The center is the BBU cloud controller corresponding to the BBU cloud.

With reference to any one of the first aspect to the second possible implementation manner of the first aspect, in the fifth possible implementation manner of the first aspect, if the multiple RRUs belong to multiple BBUs respectively, The dispatching center is an ad hoc network SON controller to which the plurality of BBUs belong.

A second aspect of the present invention provides a positioning reference signal scheduling method, including:

The RRU acquires a frequency domain sub-segment of the positioning reference signal PRS allocated by the scheduling center;

The RRU transmits a PRS on the PRS transmission frequency domain sub-segment, where the PRS transmission frequency domain sub-segment allocated by the scheduling center to the RRU is different from the PRS transmission frequency domain sub-segment allocated to other RRUs in the scheduling range. .

With reference to the second aspect, in a first possible implementation manner of the second aspect, the RRU is configured to transmit a PRS on the PRS transmit frequency domain sub-segment, including:

The RRU transmits a PRS at the same time as other RRUs in the scheduling range on the PRS transmission frequency domain sub-segment.

A third aspect of the present invention provides a positioning reference signal scheduling method, including:

The RRU transmits the positioning reference signal PRS on the preset frequency domain sub-segment within a preset time period;

After the preset period of time, the RRU detects whether a frequency domain sub-section of a neighboring RRU transmitting a PRS is the same as the preset frequency domain sub-segment;

If the RRU detects that the frequency domain sub-segment of the neighboring RRU transmitting the PRS is the same as the preset frequency domain sub-segment, the RRU searches for the idle frequency domain according to the frequency domain sub-segment of the neighboring RRU transmitting the PRS. Subsection

The RRU switches to the idle frequency domain sub-segment to transmit a PRS.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the RRU, after the preset time period, detecting whether a frequency domain sub-section of a neighboring RRU transmitting PRS is related to the preset frequency domain The segments are the same, including:

The RRU stops transmitting the PRS after the preset time period, and receives the PRS sent by the neighboring RRU;

The RRU detects, according to the PRS sent by the neighboring RRU, whether a frequency domain sub-section of the adjacent RRU transmitting PRS is the same as the preset frequency domain sub-segment.

A fourth aspect of the present invention provides a scheduling center, including:

An allocation module, configured to respectively allocate different positioning reference signal PRS transmission frequency domain sub-segments for multiple RRUs in the scheduling range;

And a sending module, configured to notify, to the corresponding RRU, the PRS transmission frequency domain sub-segment allocated for each RRU, so that each RRU transmits a PRS in the PRS transmission frequency domain sub-segment allocated by the scheduling center.

In conjunction with the fourth aspect, in a first possible implementation manner of the fourth aspect, the multiple RRUs in the scheduling range transmit the PRS at the same time.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the allocating module is configured to divide the current PRS available frequency band into N frequency domains. a sub-segment, where N is a positive integer, and N is greater than or equal to 1; sequentially scanning the N frequency domain sub-segments to acquire occupation information of the N frequency domain sub-segments; according to the N frequency domain sub-segments The occupation information is allocated to the plurality of RRUs in the scheduling range by different PRS transmission frequency domain sub-segments in the N frequency domain sub-segments.

Combining any of the fourth aspect to the second possible implementation of the fourth aspect, in the fourth party In a third possible implementation manner, if the multiple RRUs belong to the same baseband processing unit BBU, the scheduling center is the BBU.

With reference to any one of the fourth aspect to the second possible implementation manner of the fourth aspect, in the fourth possible implementation manner of the fourth aspect, if the multiple RRUs belong to the same BBU cloud, the scheduling The center is the BBU cloud controller corresponding to the BBU cloud.

With reference to any one of the fourth aspect to the second possible implementation manner of the fourth aspect, in the fifth possible implementation manner of the fourth aspect, if the multiple RRUs belong to multiple BBUs respectively, The dispatching center is an ad hoc network SON controller to which the plurality of BBUs belong.

A fifth aspect of the present invention provides a radio remote unit, including:

a receiving module, configured to acquire a frequency domain sub-segment of a positioning reference signal PRS allocated by the scheduling center;

a transmitting module, configured to transmit a PRS on the PRS transmission frequency domain sub-segment, where the scheduling center allocates a PRS transmission frequency domain sub-segment of the RRU and a PRS transmission frequency domain allocated to other RRUs in the scheduling range The segments are different.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the transmitting module is specifically configured to send, at the same time, another RRU in the scheduling range on the PRS transmission frequency domain sub-segment PRS.

A sixth aspect of the present invention provides a radio remote unit, including:

a transmitting module, configured to transmit a positioning reference signal PRS on a preset frequency domain sub-segment within a preset time period;

a detecting module, configured to detect, after the preset time period, whether a frequency domain sub-segment of a neighboring RRU transmitting PRS is the same as the preset frequency domain sub-segment;

a locating module, configured to: if the detecting module detects that the frequency domain sub-segment of the neighboring RRU transmitting the PRS is the same as the preset frequency domain sub-segment, searching for the frequency domain sub-segment of the PRS according to the neighboring RRU Idle frequency domain subsection;

And a switching module, configured to control the transmitting module to switch to the idle frequency domain sub-segment to transmit a PRS.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the detecting module is configured to control the transmitting module to stop transmitting the PRS after the preset time period, and receive the neighboring RRU transmission. And detecting, according to the PRS sent by the neighboring RRU, whether a frequency domain sub-section of the adjacent RRU transmitting PRS is the same as the preset frequency domain sub-segment.

A seventh aspect of the present invention provides a scheduling center, including: a processor, an interface circuit, and a memory And a bus, wherein the processor, the interface circuit, and the memory are connected by the bus and complete communication with each other, wherein the memory stores a set of program codes, and the processor calls the memory Stored program code, do the following:

Allocating different positioning reference signal PRS transmission frequency domain sub-segments for multiple RRUs in the scheduling range;

And transmitting, by the interface circuit, the PRS transmission frequency domain sub-segment allocated for each RRU to a corresponding RRU, so that each RRU transmits a PRS in the PRS transmission frequency domain sub-segment allocated by the scheduling center.

In conjunction with the seventh aspect, in a first possible implementation manner of the seventh aspect, the multiple RRUs in the scheduling range transmit the PRS at the same time.

With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in a second possible implementation manner of the seventh aspect, the processor is configured to divide the current PRS available frequency band into N frequency domains. a sub-segment, where N is a positive integer, and N is greater than or equal to 1; sequentially scanning the N frequency domain sub-segments to acquire occupation information of the N frequency domain sub-segments; according to the N frequency domain sub-segments The occupation information is allocated to the plurality of RRUs in the scheduling range by different PRS transmission frequency domain sub-segments in the N frequency domain sub-segments.

With reference to any one of the second aspect to the second possible implementation manner of the seventh aspect, in the third possible implementation manner of the seventh aspect, if the multiple RRUs belong to the same baseband processing unit BBU, The scheduling center is the BBU.

With reference to any one of the second aspect to the second possible implementation manner of the seventh aspect, in the fourth possible implementation manner of the seventh aspect, the scheduling is performed if the multiple RRUs belong to the same BBU cloud The center is the BBU cloud controller corresponding to the BBU cloud.

With reference to any one of the seventh aspect to the second possible implementation manner of the seventh aspect, in the fifth possible implementation manner of the seventh aspect, if the multiple RRUs belong to multiple BBUs respectively, The dispatching center is an ad hoc network SON controller to which the plurality of BBUs belong.

An eighth aspect of the present invention provides a radio remote unit including: a processor, an interface circuit, a memory, and a bus, wherein the processor, the interface circuit, and the memory are connected by the bus and complete each other Communication wherein the memory stores a set of program code, the processor invoking program code stored in the memory, performing the following operations:

Obtaining, by using the interface circuit, a positioning reference signal PRS transmission frequency domain allocated by the scheduling center segment;

Transmitting, by the interface circuit, a PRS on the PRS transmit frequency domain sub-segment, where the scheduling center allocates a PRS transmit frequency domain sub-segment of the RRU and a PRS transmit frequency domain allocated to other RRUs in the scheduling range. Subsections are different.

With reference to the eighth aspect, in a first possible implementation manner of the eighth aspect, the processor is configured to use, by using the interface circuit, the frequency domain sub-segment of the PRS, and other The RRU transmits the PRS at the same time.

A ninth aspect of the present invention provides a radio remote unit comprising: a processor, an interface circuit, a memory, and a bus, wherein the processor, the interface circuit, and the memory are connected by the bus and complete each other Communication wherein the memory stores a set of program code, the processor invoking program code stored in the memory, performing the following operations:

Transmitting, by the interface circuit, a positioning reference signal PRS on a preset frequency domain sub-segment within a preset time period;

After the preset time period, detecting whether the frequency domain sub-segment of the adjacent RRU transmitting the PRS is the same as the preset frequency domain sub-segment; if detecting the frequency domain sub-segment of the adjacent RRU transmitting the PRS, If the preset frequency domain sub-segments are the same, the idle frequency domain sub-segment is searched according to the frequency domain sub-segment of the neighboring RRU transmitting PRS; and the interface circuit is controlled to switch to the idle frequency domain sub-segment to transmit the PRS.

With reference to the ninth aspect, in a first possible implementation manner of the ninth aspect, the processor, after the preset time period, detecting whether a frequency domain sub-section of a neighboring RRU transmitting a PRS is related to the preset frequency The domain sub-segments are the same, specifically: controlling the interface circuit to stop transmitting the PRS after the preset time period, and receiving the PRS sent by the neighboring RRU; detecting the adjacent RRU transmission according to the PRS sent by the neighboring RRU Whether the frequency domain subsection of the PRS is the same as the preset frequency domain subsection.

In the positioning reference signal sending method and apparatus provided by the embodiment of the present invention, the scheduling center uniformly allocates different PRS transmission frequency domain sub-segments for multiple RRUs in the scheduling range, and allocates a PRS transmission frequency domain for each RRU. The sub-segment is notified to the corresponding RRU to ensure that each RRU transmits PRS in different PRS transmit frequency domain sub-segments to avoid interference of PRS transmitted by different RRUs. This unified allocation method is simple and easy to implement, and problems are easily located and maintained. The allocation efficiency is high, the signaling overhead of each network element in the network is reduced, and the automatic allocation of the PRS transmission frequency domain sub-segments can be realized without pre-configuration. There is no need to consider the staggering in the time domain, and avoid the problem that there are few options for the available transmission timing in some scenarios, and it is almost difficult to stagger.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic structural diagram of Embodiment 1 of an application scenario of a positioning reference signal sending method according to the present invention;

2 is a schematic structural diagram of Embodiment 2 of an application scenario of a positioning reference signal sending method according to the present invention;

3 is a schematic structural diagram of Embodiment 3 of an application scenario of a positioning reference signal sending method according to the present invention;

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

FIG. 5 is a schematic flowchart of Embodiment 2 of a method for sending a positioning reference signal according to the present invention;

FIG. 6 is a schematic flowchart diagram of Embodiment 3 of a method for transmitting a positioning reference signal according to the present invention;

FIG. 7 is a schematic flowchart diagram of Embodiment 4 of a method for transmitting a positioning reference signal according to the present invention;

FIG. 8 is a schematic flowchart of Embodiment 5 of a method for transmitting a positioning reference signal according to the present invention;

FIG. 9 is a schematic structural diagram of Embodiment 1 of a scheduling center according to the present invention;

10 is a schematic structural diagram of Embodiment 1 of a radio remote unit according to the present invention;

11 is a schematic structural diagram of Embodiment 2 of a radio remote unit according to the present invention;

FIG. 12 is a schematic structural diagram of Embodiment 2 of a scheduling center according to the present invention;

FIG. 13 is a schematic structural diagram of Embodiment 3 of a radio remote unit according to the present invention; FIG.

FIG. 14 is a schematic structural diagram of Embodiment 4 of a radio remote unit according to the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. Based on the embodiments of the present invention, those skilled in the art are not making creative labor All other embodiments obtained below are within the scope of the invention.

The embodiment of the present invention is applied to a scenario in which a terminal is located in a wireless communication system, and the terminal, which is also called a user equipment (User Equipment, UE), is a voice and/or data connection provided to the user. Sexual devices, for example, handheld devices with wireless connectivity, in-vehicle devices, other processing devices connected to wireless modems, and the like. Specifically, it can be used in a wireless access network architecture such as the 3rd Generation Partnership Project (3GPP) or 3GPP2.

The application of the embodiment of the present invention in different scenarios in a wireless access network is described below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of Embodiment 1 of a method for transmitting a positioning reference signal according to the present invention. As shown in FIG. 1 , the positioning reference signal sending method is applicable to a management area of a Baseband Unit (BBU). A BBU includes multiple radio remote units (RRUs), and it is necessary to avoid interference between multiple RRUs in the same BBU.

As shown in FIG. 1 , the network architecture includes: a positioning server, a Mobility Management Entity (MME) (or a Serving GateWay (SGW)), a BBU, and multiple RRUs under the BBU.

2 is a schematic structural diagram of Embodiment 2 of a scenario for applying a positioning reference signal according to the present invention. As shown in FIG. 2, the positioning reference signal sending method is applicable to a management scope of a BBU cloud controller, and a BBU cloud controller ( The BBU Cloud controller manages multiple RRUs. These RRUs can belong to different BBUs or can be directly managed by the BBU cloud controller.

As shown in FIG. 2, the network architecture includes: a positioning server, an MME (or SGW), a BBU cloud controller, at least one BBU, and multiple RRUs.

FIG. 3 is a schematic structural diagram of Embodiment 3 of an application scenario of a positioning reference signal sending method according to the present invention. As shown in FIG. 3, the positioning reference signal sending method is applicable to an entire network. Specifically, the network architecture includes: a positioning server, an MME (or SGW), at least one BBU, and a plurality of RRUs. In addition, the network architecture further includes: a Self-organizing Network (SON) central scheduling server, where The SON central scheduling server can configure the RRU of the entire network.

4 is a schematic flowchart of Embodiment 1 of a method for transmitting a positioning reference signal according to the present invention, such as As shown in FIG. 4, the execution body of the method is a scheduling center, and the scheduling center can be integrated on different devices according to different scheduling ranges. As shown in FIG. 1 , multiple RRUs belong to the same BBU, and the scheduling center is the BBU. If the multiple RRUs belong to the same BBU cloud, the scheduling center is the BBU cloud controller. As shown in Figure 3, multiple RRUs belong to multiple BBUs, that is, these RRUs belong to the same. If there are multiple BBUs in the whole network, the scheduling center can be the SON controller to which the multiple BBUs belong, but not limited to this.

The method includes:

S401. The scheduling center allocates different PRS transmission frequency domain sub-segments for each of the multiple RRUs in the scheduling range.

S402. The scheduling center notifies the corresponding RRUs of the foregoing PRS transmission frequency domain sub-segments allocated to each RRU, so that each RRU transmits a PRS in a PRS transmission frequency domain sub-segment allocated by the scheduling center.

That is, the scheduling center uniformly allocates the PRS transmission frequency domain sub-segments used by the multiple RRUs separately, so that the RRU can transmit the PRS in different PRS transmission frequency domain sub-segments, so that no interference between the RRUs is caused.

In this embodiment, the scheduling center uniformly allocates different PRS transmission frequency domain sub-segments for the multiple RRUs in the scheduling range, and notifies the corresponding RRUs for the PRS transmission frequency domain sub-segments allocated to each RRU to ensure Each RRU transmits PRS in different PRS transmit frequency domain sub-segments to avoid interference of PRSs transmitted by different RRUs. This unified allocation method is simple and easy to implement, problems are easy to locate and maintain, and allocation efficiency is high, and the network is reduced. The signaling overhead of each network element, and the automatic allocation of the frequency domain sub-segments of the PRS transmission can be realized without pre-configuration. There is no need to consider the staggering in the time domain, and avoid the problem that there are few options for the available transmission timing in some scenarios, and it is almost difficult to stagger.

In a specific implementation process, multiple RRUs in the scheduling range may be pre-configured to transmit PRSs at the same time. That is, multiple RRUs in the scheduling range transmit PRSs at different times and in different PRS transmission frequency domain sub-segments.

FIG. 5 is a schematic flowchart of Embodiment 2 of a method for transmitting a positioning reference signal according to the present invention. As shown in FIG. 5, on the basis of the foregoing embodiment, S401 specifically includes:

S501. The scheduling center divides the current PRS available frequency band into N frequency domain sub-segments. Where N is a positive integer and N is greater than or equal to 1.

S502: The scheduling center scans the N frequency domain sub-segments at a time to obtain occupation information of the N frequency domain sub-segments.

For example, a section of the available frequency band can be divided into three frequency domain sub-segments of upper, middle and lower, and the specific division is not limited herein.

S503. The scheduling center allocates different PRS transmission frequency domain sub-segments in the N frequency domain sub-segments for the plurality of RRUs in the scheduling range according to the occupation information of the N frequency domain sub-segments.

After the division, the N frequency domain sub-segments may be occupied. In the specific allocation, the frequency domain sub-segments that are not occupied are allocated to the RRU as the PRS transmission frequency domain sub-segments.

FIG. 6 is a schematic flowchart of Embodiment 3 of a method for sending a positioning reference signal according to the present invention. As shown in FIG. 6, S502 specifically includes:

S601. The scheduling center detects a PRS transmission spectrum of each of the plurality of RRUs on the kth frequency domain sub-segment of the N frequency domain sub-segments. Where k is a positive integer, k is greater than or equal to 1, and k is less than or equal to N.

S602. The scheduling center determines, according to the PRS transmission spectrum of each of the RRUs in the kth frequency domain sub-segment of the N frequency domain sub-segments, whether the k-th frequency domain sub-segment is occupied.

S603, adding k to 1.

If k+1 is less than or equal to N, the loop executes S601 to S603; if k+1 is greater than N, S604 is executed.

S604. Acquire occupation information of each frequency domain sub-segment in the N frequency domain sub-segments.

Correspondingly, the S503 may be: the scheduling center allocates different frequency domain sub-bands that are not occupied in the N frequency domain sub-segments for the multiple RRUs in the scheduling range according to the N frequency domain sub-segment occupation information.

FIG. 7 is a schematic flowchart of Embodiment 4 of a method for transmitting a positioning reference signal according to the present invention. As shown in FIG. 7, the execution body is an RRU. Corresponding to the foregoing embodiment, the method includes:

S701. The RRU acquires a PRS transmission frequency domain sub-segment allocated by the scheduling center.

S702. The RRU transmits the PRS on the PRS transmit frequency domain sub-section. That is, the RRU transmits the PRS on the PRS transmission frequency domain sub-segment allocated by the scheduling center.

The PRS transmission frequency domain sub-segment allocated to the RRU by the scheduling center is different from the PRS transmission frequency domain sub-segment allocated to other RRUs in the scheduling range.

In this embodiment, the scheduling center uniformly allocates different PRS transmission frequency domain sub-segments for multiple RRUs in the scheduling range, and the RRU receives the PRS transmission frequency domain sub-segment allocated by the scheduling center, and allocates the PRS transmission frequency domain in the scheduling center. PRS is transmitted on the segment to ensure that the RRU is in the frequency domain of different PRS transmissions The sub-segment transmits PRS to avoid interference of PRS transmitted by different RRUs. This unified allocation method is simple and easy to implement, and the allocation efficiency is high, which reduces the signaling overhead of each network element in the network, and can realize PRS without pre-configuration. Automatic allocation of sub-segments of the RF domain.

Specifically, the RRU transmits the PRS on the PRS transmission frequency domain sub-segment, specifically: the RRU transmits the PRS at the same time as other RRUs in the scheduling range on the PRS transmission frequency domain sub-segment. That is, the RRUs in the scheduling range all transmit PRSs at the same time, but respectively transmit PRSs on different PRS transmission frequency domain sub-segments.

FIG. 8 is a schematic flowchart of Embodiment 5 of a method for sending a positioning reference signal according to the present invention. As shown in FIG. 8, the method includes:

S801. The RRU transmits the PRS on the preset frequency domain sub-segment within a preset time period.

That is, at the time of initialization, each RRU transmits a PRS according to a frequency domain sub-segment preset in advance.

After the preset time period, the S802 and the RRU detect whether the frequency domain sub-section of the adjacent RRU transmitting the PRS is the same as the preset frequency domain sub-segment.

S803. If the RRU detects that the frequency domain sub-segment of the adjacent RRU transmitting the PRS is the same as the preset frequency domain sub-segment, the RRU searches for the idle frequency domain sub-segment according to the frequency domain sub-segment of the adjacent RRU transmitting the PRS.

S804. The RRU switches to the idle frequency domain sub-segment to transmit the PRS.

That is, each RRU in the entire network detects the frequency domain sub-segment of the PRS transmitted by the neighboring RRU, and automatically shifts the frequency domain sub-segment of the PRS of the adjacent RRU. In this way, the frequency domain of the PRS of all RRUs is implemented. The subsections are staggered.

In this embodiment, the RRU transmits the PRS on the preset frequency domain sub-segment in the preset time period, and after detecting the preset time period, detecting whether the frequency domain sub-section of the adjacent RRU transmitting the PRS is related to the preset frequency domain. If the RRU detects that the frequency domain sub-segment of the adjacent RRU transmitting the PRS is the same as the preset frequency domain sub-segment, the idle frequency domain sub-segment is searched according to the frequency domain sub-segment of the adjacent RRU transmitting PRS, and the idle sub-segment is switched to idle. The frequency domain sub-segment transmits PRS, which realizes that the RRU of the whole network is automatically shifted from the adjacent RRU to transmit the frequency domain sub-segment of the PRS, thereby avoiding interference between adjacent RRUs. This method is simple and easy to implement, and problems are easily located and Maintenance, and high allocation efficiency, reducing the signaling overhead of each network element in the network, and automatically realizing the automatic allocation of PRS transmission frequency domain sub-segments without pre-configuration. There is no need to consider the staggering in the time domain, and avoid the problem that there are few options for the available transmission timing in some scenarios, and it is almost difficult to stagger.

In the specific implementation process, the foregoing S802 may be: the RRU stops after the preset time period. The PRS is transmitted, and the PRS sent by the neighboring RRU is received, and the RRU detects whether the frequency domain sub-section of the adjacent RRU transmitting PRS is the same as the preset frequency domain sub-segment according to the PRS sent by the neighboring RRU.

That is, in this embodiment, the RRU periodically switches its own transceiver mode. After a period of time, the mode of transmitting the PRS is a mode for receiving the PRS, to receive the PRS transmitted by the neighboring RRU, and obtain the frequency used by the neighboring RRU to transmit the PRS. If the domain sub-segment is the same, it searches for the idle frequency domain sub-segment and switches itself to the idle frequency domain sub-segment to transmit the PRS, that is, after switching back to the transmission mode, the PRS is transmitted on the idle frequency domain sub-segment, and the adjacent RRU The transmitted PRS is staggered in the frequency domain.

FIG. 9 is a schematic structural diagram of Embodiment 1 of a scheduling center according to the present invention. As shown in FIG. 9, the scheduling center includes: an allocation module 901 and a sending module 902.

The allocating module 901 is configured to separately allocate different positioning reference signal PRS transmission frequency domain sub-segments for multiple RRUs in the scheduling range.

The sending module 902 is configured to notify the corresponding RRUs of the PRS transmission frequency domain sub-segments allocated for each RRU, so that each RRU transmits a PRS in the PRS transmission frequency domain sub-segment allocated by the scheduling center.

Further, multiple RRUs within the above scheduling range transmit PRSs at the same time.

The allocation module 901 is specifically configured to divide the current PRS available frequency band into N frequency domain sub-segments, where N is a positive integer and N is greater than or equal to 1; sequentially scanning the N frequency domain sub-segments to obtain the N The occupancy information of the frequency domain sub-segment; the different PRS transmission frequencies are respectively allocated in the N frequency domain sub-segments for the plurality of RRUs in the scheduling range according to the occupancy information of the N frequency domain sub-segments Domain subsection.

As shown in Figure 1, the multiple RRUs belong to the same BBU, and the scheduling center is the BBU, that is, the BBU to which these RRUs belong. If multiple RRUs belong to the same BBU cloud as shown in Figure 2, the scheduling center is the BBU cloud controller. If shown in Figure 3, multiple RRUs belong to multiple BBUs, that is, these RRUs. The SON controllers to which the multiple BBUs belong may be, but not limited to, the plurality of BBUs that are different in the entire network.

The scheduling center is used to perform the foregoing method embodiments, and the implementation principle and technical effects are similar, and details are not described herein again.

It should be noted that the foregoing allocating module 901 may be implemented by a processor of a dispatching center, and the processor may be a separately set processor, or may be integrated into one processor of the dispatching center, or may be implemented by a program. The form of the code is stored in the memory of the dispatch center, and is called by one of the processors of the dispatch center and performs the functions of the above allocation module 901. The processor described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated systems configured to implement embodiments of the present invention. Circuit. The sending module 902 can be implemented by using an interface, which is used to implement communication between the scheduling center and the RRU. The interface can be a wired interface, for example, a fiber interface. Of course, it can also be a wireless interface, and no limitation is imposed here.

FIG. 10 is a schematic structural diagram of Embodiment 1 of a radio remote unit according to the present invention. As shown in FIG. 10, the radio remote unit includes a receiving module 110 and a transmitting module 111. among them,

The receiving module 110 is configured to obtain a PRS transmission frequency domain sub-segment allocated by the scheduling center.

The transmitting module 111 is configured to transmit a PRS on the PRS transmit frequency domain sub-segment, where the scheduling center allocates a PRS transmit frequency domain sub-segment of the RRU and a PRS transmit frequency domain allocated to other RRUs in the scheduling range. Subsections are different.

In this embodiment, the scheduling center uniformly allocates different PRS transmission frequency domain sub-segments for multiple RRUs in the scheduling range, and the RRU receives the PRS transmission frequency domain sub-segment allocated by the scheduling center, and allocates the PRS transmission frequency domain in the scheduling center. The PRS is transmitted on the segment to ensure that the RRU transmits PRS in different PRS transmission frequency domain sub-segments to avoid interference of PRS transmitted by different RRUs. This unified allocation method is simple and easy to implement, and the allocation efficiency is high, and the network in the network is reduced. The signaling overhead of the element, and the automatic allocation of the frequency domain sub-segments of the PRS transmission can be realized without pre-configuration.

Further, the transmitting module 111 is specifically configured to: on the PRS transmission frequency domain sub-segment, transmit the PRS at the same time as other RRUs in the scheduling range.

It should be noted that the foregoing receiving module 110 can be implemented by using an interface, and the interface is used to implement communication between the RRU and the scheduling center. The interface may be a wired interface, for example, a fiber interface. Of course, it can also be a wireless interface, and no limitation is imposed here. The transmitting module 111 can be composed of The processing element of the RRU is implemented, and the processing element can be a separately set processing element, or can be integrated into one of the processing elements of the RRU, or can be stored in the storage element of the RRU in the form of program code, by the RRU. One of the processing elements calls and executes the functions of the above transmitting module. And the transmitting module 111 can send the PRS through the antenna. The processing element described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated systems configured to implement embodiments of the present invention. Circuit.

FIG. 11 is a schematic structural diagram of Embodiment 2 of a radio remote unit according to the present invention. As shown in FIG. 11 , the radio remote unit includes: a transmitting module 112, a detecting module 113, a searching module 114, and a switching module 115.

The transmitting module 112 is configured to transmit the positioning reference signal PRS on the preset frequency domain sub-segment within a preset time period.

The detecting module 113 is configured to detect, after the preset time period, whether a frequency domain sub-section of a neighboring RRU transmitting PRS is the same as the preset frequency domain sub-segment.

The searching module 114 is configured to: if the detecting module 113 detects that the frequency domain sub-segment of the neighboring RRU transmitting the PRS is the same as the preset frequency domain sub-segment, the frequency domain sub-segment of the PRS is sent according to the neighboring RRU. Idle frequency domain subsection.

The switching module 115 is configured to control the transmitting module 112 to switch to the idle frequency domain sub-segment to transmit the PRS.

Specifically, the detecting module 113 controls the transmitting module 112 to stop sending after the preset time period. The PRS is transmitted, and the PRS sent by the neighboring RRU is received. The PRS sent by the neighboring RRU is used to detect whether the frequency domain sub-section of the adjacent RRU transmitting PRS is the same as the preset frequency domain sub-segment.

It should be noted that the transmitting module 112 may be implemented by a processing component of the RRU, and the processing component may be a separately established processing component, or may be integrated into one processing component of the RRU, or may be in the form of program code. Stored in the storage element of the RRU, the function of the above transmitting module is called and executed by one of the processing elements of the RRU. And the transmitting module can send the PRS through the antenna. The processing element described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated systems configured to implement embodiments of the present invention. Circuit. The detection module 113, the search module 114, the implementation of the switching module 115 and the transmitting module, and they may be integrated in whole or in part, or may be implemented separately.

FIG. 12 is a schematic structural diagram of Embodiment 2 of a scheduling center according to the present invention. As shown in FIG. 12, the scheduling center includes: a processor 121, an interface circuit 122, a memory 123, and a bus 124.

The processor 121, the interface circuit 122, and the memory 123 are connected by a bus 124 and complete communication with each other, wherein the memory 123 stores a set of program codes, and the processor 121 is configured to call the memory 123. Stored program code, do the following:

A plurality of positioning reference signal PRS transmission frequency domain sub-segments are respectively allocated for a plurality of RRUs within the scheduling range.

The PRS transmission frequency domain sub-segment allocated for each RRU is notified to the corresponding RRU through the interface circuit 122, so that each RRU transmits the PRS in the PRS transmission frequency domain sub-segment allocated by the scheduling center.

A plurality of RRUs within the scheduling range transmit PRSs at the same time.

In the specific implementation process, the processor 121 is specifically configured to: divide the current PRS available frequency band into N frequency domain sub-segments, where N is a positive integer, N is greater than or equal to 1; and sequentially scanning the N frequency domain sub-segments Acquiring the occupation information of the N frequency domain sub-segments; according to the occupancy information of the N frequency domain sub-sections, the multiple RRUs in the scheduling range are respectively in the N frequency domain sub-segments Assign different PRS transmit frequency domain sub-segments.

As shown in Figure 1, multiple RRUs belong to the same BBU, and the dispatch center is the BBU, that is, these If the RRU belongs to the same BBU cloud, the scheduling center is the BBU cloud controller. As shown in Figure 3, multiple RRUs belong to multiple BBUs. If there are multiple BBUs in the network, the scheduling center may be the SON controller to which the multiple BBUs belong, but not limited to this.

FIG. 13 is a schematic structural diagram of Embodiment 3 of a radio remote unit according to the present invention. As shown in FIG. 13, the radio remote unit includes: a processor 131, an interface circuit 132, a memory 133, and a bus 134.

The processor 131, the interface circuit 132, and the memory 133 are connected and communicate with each other through a bus 134, wherein the memory 133 stores a set of program codes, and the processor 131 is used to call the memory 133. Stored program code, do the following:

Through the interface circuit 132, the positioning reference signal PRS transmission frequency domain sub-segment allocated by the scheduling center is obtained.

Transmitting, by the interface circuit 132, a PRS on the PRS transmission frequency domain sub-segment, wherein the scheduling center allocates a PRS transmission frequency domain sub-segment of the RRU and a PRS transmission frequency domain allocated to other RRUs in the scheduling range. The segments are different.

More specifically, through the interface circuit 132, on the PRS transmission frequency domain sub-segment, the PRS is transmitted at the same time as other RRUs in the scheduling range.

The radio remote unit is used to perform the foregoing method embodiments, and the implementation principle and technical effects are similar, and details are not described herein again.

FIG. 14 is a schematic structural diagram of Embodiment 4 of the radio remote unit according to the present invention. As shown in FIG. 14, the radio remote unit includes: a processor 141, an interface circuit 142, a memory 143, and a bus 144.

The processor 141, the interface circuit 142, and the memory 143 are connected and communicate with each other via a bus 144, wherein the memory 143 stores a set of program codes, and the processor 141 is configured to call a program stored in the memory 143. Code, do the following:

Transmitting, by the interface circuit 142, the positioning reference signal PRS on the preset frequency domain sub-segment within a preset time period;

After the preset time period, detecting whether the frequency domain sub-segment of the adjacent RRU transmitting the PRS is the same as the preset frequency domain sub-segment; if detecting the frequency domain sub-segment of the adjacent RRU transmitting the PRS, If the preset frequency domain sub-segments are the same, the idle frequency is searched according to the frequency domain sub-section of the adjacent RRU transmitting PRS. The domain subsection; the control interface circuit 142 switches to the idle frequency domain sub-segment to transmit the PRS.

It should be noted that, after the preset time period, the processor 141 detects whether the frequency domain sub-segment of the adjacent RRU transmitting the PRS is the same as the preset frequency domain sub-segment, specifically: the control interface circuit 142 is in the Stopping the PRS after the preset time period, and receiving the PRS sent by the neighboring RRU; detecting whether the frequency domain sub-segment of the adjacent RRU transmitting the PRS is related to the preset frequency domain according to the PRS sent by the neighboring RRU The segments are the same.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A positioning reference signal sending method, comprising:

The scheduling center allocates different positioning reference signal PRS transmission frequency domain sub-segments for the plurality of radio remote units RRU in the scheduling range;

The scheduling center notifies the corresponding RRUs of the PRS transmission frequency domain sub-segments allocated to each RRU, so that each RRU transmits a PRS in the PRS transmission frequency domain sub-segment allocated by the scheduling center.
The method of claim 1 wherein a plurality of RRUs within the scheduling range transmit PRSs at the same time.
The method according to claim 1 or 2, wherein the scheduling center allocates different PRS transmission frequency domain sub-segments for a plurality of RRUs in the scheduling range, including:

The scheduling center divides the current PRS available frequency band into N frequency domain sub-sections, where N is a positive integer and N is greater than or equal to 1;

The scheduling center sequentially scans the N frequency domain sub-segments to obtain occupation information of the N frequency domain sub-segments;

The scheduling center allocates different PRS transmission frequency domain sub-segments in the N frequency domain sub-segments for the multiple RRUs in the scheduling range according to the occupancy information of the N frequency domain sub-segments.
The method according to any one of claims 1-3, wherein if the plurality of RRUs belong to the same baseband processing unit BBU, the scheduling center is the BBU.
The method according to any one of claims 1-3, wherein if the plurality of RRUs belong to the same BBU cloud, the scheduling center is a BBU cloud controller corresponding to the BBU cloud.
The method according to any one of claims 1-3, wherein if the plurality of RRUs belong to a plurality of BBUs respectively, the scheduling center is an ad hoc network SON controller to which the plurality of BBUs belong.
A positioning reference signal scheduling method, comprising:

The RRU acquires a frequency domain sub-segment of the positioning reference signal PRS allocated by the scheduling center;

The RRU transmits a PRS on the PRS transmission frequency domain sub-segment, where the PRS transmission frequency domain sub-segment allocated by the scheduling center to the RRU is different from the PRS transmission frequency domain sub-segment allocated to other RRUs in the scheduling range. .
The method of claim 7 wherein said RRU is in said PRS The PRS is transmitted on the radio domain subsection, including:

The RRU transmits a PRS at the same time as other RRUs in the scheduling range on the PRS transmission frequency domain sub-segment.
A positioning reference signal scheduling method, comprising:

The RRU transmits the positioning reference signal PRS on the preset frequency domain sub-segment within a preset time period;

After the preset period of time, the RRU detects whether a frequency domain sub-section of a neighboring RRU transmitting a PRS is the same as the preset frequency domain sub-segment;

If the RRU detects that the frequency domain sub-segment of the neighboring RRU transmitting the PRS is the same as the preset frequency domain sub-segment, the RRU searches for the idle frequency domain according to the frequency domain sub-segment of the neighboring RRU transmitting the PRS. Subsection

The RRU switches to the idle frequency domain sub-segment to transmit a PRS.
The method according to claim 9, wherein the RRU detects whether the frequency domain sub-segment of the adjacent RRU transmitting PRS is the same as the preset frequency domain sub-segment after the preset time period, including:

The RRU stops transmitting the PRS after the preset time period, and receives the PRS sent by the neighboring RRU;

The RRU detects, according to the PRS sent by the neighboring RRU, whether a frequency domain sub-section of the adjacent RRU transmitting PRS is the same as the preset frequency domain sub-segment.
A dispatching center, comprising:

An allocation module, configured to respectively allocate different positioning reference signal PRS transmission frequency domain sub-segments for multiple RRUs in the scheduling range;

And a sending module, configured to notify, to the corresponding RRU, the PRS transmission frequency domain sub-segment allocated for each RRU, so that each RRU transmits a PRS in the PRS transmission frequency domain sub-segment allocated by the scheduling center.
The dispatching center according to claim 11, wherein a plurality of RRUs within the scheduling range transmit PRSs at the same time.
The scheduling center according to claim 11 or 12, wherein the allocation module is specifically configured to divide the current PRS available frequency band into N frequency domain sub-sections, where N is a positive integer and N is greater than or equal to 1 And scanning the N frequency domain sub-segments to obtain the occupation information of the N frequency domain sub-segments; and according to the occupation information of the N frequency domain sub-sections, the multiple The RRU allocates different PRS transmit frequency domain sub-segments in the N frequency domain sub-segments, respectively.
The dispatching center according to any one of claims 11 to 13, wherein if the plurality of RRUs belong to the same baseband processing unit BBU, the dispatching center is the BBU.
The scheduling center according to any one of claims 11 to 13, wherein if the plurality of RRUs belong to the same BBU cloud, the scheduling center is a BBU cloud controller corresponding to the BBU cloud.
The scheduling center according to any one of claims 11 to 13, wherein if the plurality of RRUs belong to a plurality of BBUs, the scheduling center is an ad hoc network SON controller to which the plurality of BBUs belong. .
A radio remote unit, comprising:

a receiving module, configured to acquire a frequency domain sub-segment of a positioning reference signal PRS allocated by the scheduling center;

a transmitting module, configured to transmit a PRS on the PRS transmission frequency domain sub-segment, where the scheduling center allocates a PRS transmission frequency domain sub-segment of the RRU and a PRS transmission frequency domain allocated to other RRUs in the scheduling range The segments are different.
The radio remote unit according to claim 17, wherein the transmitting module is configured to transmit a PRS at the same time as other RRUs in the scheduling range on the PRS transmission frequency domain sub-segment.
A radio remote unit, comprising:

a transmitting module, configured to transmit a positioning reference signal PRS on a preset frequency domain sub-segment within a preset time period;

a detecting module, configured to detect, after the preset time period, whether a frequency domain sub-segment of a neighboring RRU transmitting PRS is the same as the preset frequency domain sub-segment;

a locating module, configured to: if the detecting module detects that the frequency domain sub-segment of the neighboring RRU transmitting the PRS is the same as the preset frequency domain sub-segment, searching for the frequency domain sub-segment of the PRS according to the neighboring RRU Idle frequency domain subsection;

And a switching module, configured to control the transmitting module to switch to the idle frequency domain sub-segment to transmit a PRS.
The radio remote unit according to claim 19, wherein the detecting module is configured to control the transmitting module to stop transmitting the PRS after the preset time period, and receive the PRS sent by the neighboring RRU; Detecting, according to the PRS sent by the neighboring RRU, whether the frequency domain sub-section of the adjacent RRU transmitting PRS is the same as the preset frequency domain sub-segment.