CN114079545A - Method, device, equipment and storage medium for sending positioning reference signal - Google Patents
Method, device, equipment and storage medium for sending positioning reference signal Download PDFInfo
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Abstract
The embodiment of the invention provides a method, a device, equipment and a storage medium for sending a positioning reference signal, which are applied to wireless transceiver equipment, wherein the wireless transceiver equipment comprises at least two ports, and the method for sending the positioning reference signal comprises the following steps: acquiring a PRS sequence corresponding to each port; determining a resource position and a mapping numerical value of a PRS sequence corresponding to each port in a time-frequency resource; and sending the PRS sequence corresponding to each port according to the resource position and the mapping numerical value of the PRS sequence corresponding to each port in the time-frequency resource. The method and the device are used for realizing diversity transmission of the positioning reference signals, and further improving the positioning accuracy of the terminal equipment.
Description
Technical Field
The embodiments of the present invention relate to the field of communications, and in particular, to a method, an apparatus, a device, and a storage medium for sending a positioning reference signal.
Background
Currently, a base station can locate a terminal device (e.g., a smart phone, a tablet computer, etc.).
In the specification Rel-16 of the second release of the 5G standard, a method for a base station to locate a terminal device comprises: positioning Reference Signals (PRS) are generated in a single port (provided in a base station), and the PRS is transmitted to a terminal device through the single port, so that the terminal device is positioned.
In the method, the positioning reference signal is generated in the single port, and the positioning reference signal is sent to the terminal device through the single port, so that the terminal device cannot be accurately positioned.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a storage medium for sending a positioning reference signal, which are used for realizing diversity sending of the positioning reference signal and further improving the positioning accuracy of terminal equipment.
In a first aspect, an embodiment of the present invention provides a method for sending a positioning reference signal, where the method is applied to a wireless transceiver device, where the wireless transceiver device includes at least two ports, and the method includes:
acquiring a PRS sequence corresponding to each port;
determining a resource position and a mapping numerical value of a PRS sequence corresponding to each port in a time-frequency resource;
and sending the PRS sequence corresponding to each port according to the resource position and the mapping numerical value of the PRS sequence corresponding to each port in the time-frequency resource.
In one possible design, determining a resource location and a mapping value of a PRS sequence corresponding to each port in a time-frequency resource includes:
acquiring a starting subcarrier index of a port corresponding to a PRS sequence on each OFDM symbol;
determining the subcarrier index of the port corresponding to the PRS sequence according to the initial subcarrier index of the port corresponding to the PRS sequence on each OFDM symbol;
and determining the resource position and the mapping numerical value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource according to the subcarrier index, the OFDM symbol index, the power scaling factor and the PRS sequence of the port corresponding to the PRS sequence.
In one possible design, the subcarrier index of the port corresponding to the PRS sequence satisfies formula one:
wherein k is a PRS sequenceSubcarrier index of the port corresponding to the column, m is element index of the element in the PRS sequence,
is a frequency domain comb factor, k0For the port corresponding to PRS sequence, the index is
K' is the relative index of the first subcarrier occupied by the positioning reference signal in the OFDM symbol with index l
The offset of the first sub-carrier occupied by the positioning reference signal in the OFDM symbol of (1),
mod is the modulo operation for the first OFDM symbol index occupied by the positioning reference signal.
In one possible design, the at least two ports include a first port and a second port; k is a radical of0The formula II is satisfied:
wherein the content of the first and second substances,
for the first port as indexed
The offset of the first subcarrier occupied in the OFDM symbol in the physical resource block relative to the preset subcarrier.
In one possible design, the at least two ports include a first port and a second port, k0The formula three is satisfied:
wherein the content of the first and second substances,
for the first port as indexed
The offset of the first subcarrier occupied in the OFDM symbol in the physical resource block relative to the preset subcarrier.
In one possible design, the resource position and the mapping value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource satisfy the formula four:
wherein the content of the first and second substances,
mapping values of positioning reference signals at resource positions (k, l) in time-frequency resources on ports corresponding to the PRS sequence, p is port index of the ports corresponding to the PRS sequence, l is OFDM symbol index, and betaPRSFor the power scaling factor, r (m) is the PRS sequence and m is the element index of the element in the PRS sequence.
In one possible design, determining a resource location and a mapping value of a PRS sequence corresponding to each port in a time-frequency resource includes:
acquiring subcarrier indexes of ports corresponding to the PRS sequences on each OFDM symbol;
acquiring a CDM group internal weighting coefficient of a port corresponding to the PRS sequence;
and determining the resource position and the mapping numerical value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource according to the subcarrier index, the OFDM symbol index, the power scaling factor, the CDM group internal weighting coefficient of the port corresponding to the PRS sequence and the PRS sequence on each OFDM symbol of the port corresponding to the PRS sequence.
In one possible design, the subcarrier index of the port corresponding to the PRS sequence on each OFDM symbol satisfies the formula five:
wherein k is a subcarrier index of a port corresponding to the PRS sequence on each OFDM symbol, m is an element index of an element in the PRS sequence,
is indexed for the weighting coefficients within the CDM group,
is a frequency-domain comb-like factor,
for the port corresponding to PRS sequence, the index is
The offset of the first subcarrier occupied in the OFDM symbol in the physical resource block relative to the preset subcarrier, k' is the relative index of the first subcarrier occupied by the positioning reference signal in the OFDM symbol with index l
Mod is a modulo operation,
the first OFDM symbol index occupied for positioning reference signals.
In one possible design, the resource position and the mapping value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource satisfy the formula six:
wherein the content of the first and second substances,
mapping values of positioning reference signals on ports corresponding to the PRS sequence at resource positions (k, l) in time-frequency resources, wherein p is a port index of the port corresponding to the PRS sequence, l is an OFDM symbol index, and beta isPRSIn order to be a power scaling factor,
is the CDM intra-group weighting coefficient of the port corresponding to the PRS sequence, r (m) is the PRS sequence, and m is the element index of the element in the PRS sequence.
In one possible design, the at least two ports include a first port and a second port,
is 0 or 1;
the following formula seven and formula eight are satisfied:
the CDM intra-group weighting coefficients corresponding to the first port are:
the CDM intra-group weighting coefficients for the second port are:
in a second aspect, an embodiment of the present invention provides a device for sending a positioning reference signal, where the device is applied to a wireless transceiver device, the wireless transceiver device includes at least two ports, and the device includes: an acquisition module, a determination module and a sending module, wherein,
the acquisition module is used for acquiring a PRS sequence corresponding to each port;
the determining module is used for determining the resource position and the mapping numerical value of the PRS sequence corresponding to each port in the time-frequency resource;
and the sending module is used for sending the PRS sequence corresponding to each port according to the resource position and the mapping numerical value of the PRS sequence corresponding to each port in the time-frequency resource.
In one possible design, the determining module is specifically configured to:
acquiring a starting subcarrier index of a port corresponding to a PRS sequence on each OFDM symbol;
determining the subcarrier index of the port corresponding to the PRS sequence according to the initial subcarrier index of the port corresponding to the PRS sequence on each OFDM symbol;
and determining the resource position and the mapping numerical value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource according to the subcarrier index, the OFDM symbol index, the power scaling factor and the PRS sequence of the port corresponding to the PRS sequence.
In one possible design, the subcarrier index of the port corresponding to the PRS sequence satisfies formula one:
wherein k is a subcarrier index of a port corresponding to the PRS sequence, m is an element index of an element in the PRS sequence,
is a frequency domain comb factor, k0For the port corresponding to PRS sequence, the index is
K' is the relative index of the first subcarrier occupied by the positioning reference signal in the OFDM symbol with index l
The offset of the first sub-carrier occupied by the positioning reference signal in the OFDM symbol of (1),
mod is the modulo operation for the first OFDM symbol index occupied by the positioning reference signal.
In one possible design, the at least two ports include a first port and a second port; k is a radical of0The formula II is satisfied:
wherein the content of the first and second substances,
for the first port as indexed
The offset of the first subcarrier occupied in the OFDM symbol in the physical resource block relative to the preset subcarrier.
In one possible design, the at least two ports include a first port and a second port, k0The formula three is satisfied:
wherein the content of the first and second substances,
for the first port as indexed
The offset of the first subcarrier occupied in the OFDM symbol in the physical resource block relative to the preset subcarrier.
In one possible design, the resource position and the mapping value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource satisfy the formula four:
wherein the content of the first and second substances,
mapping values of positioning reference signals at resource positions (k, l) in time-frequency resources on ports corresponding to the PRS sequence, p is port index of the ports corresponding to the PRS sequence, l is OFDM symbol index, and betaPRSFor the power scaling factor, r (m) is the PRS sequence and m is the element index of the element in the PRS sequence.
In one possible design, the determining module is specifically configured to:
acquiring subcarrier indexes of ports corresponding to the PRS sequences on each OFDM symbol;
acquiring a CDM group internal weighting coefficient of a port corresponding to the PRS sequence;
and determining the resource position and the mapping numerical value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource according to the subcarrier index, the OFDM symbol index, the power scaling factor, the CDM group internal weighting coefficient of the port corresponding to the PRS sequence and the PRS sequence on each OFDM symbol of the port corresponding to the PRS sequence.
In one possible design, the subcarrier index of the port corresponding to the PRS sequence on each OFDM symbol satisfies the formula five:
wherein k is a subcarrier index of a port corresponding to the PRS sequence on each OFDM symbol, m is an element index of an element in the PRS sequence,
is indexed for the weighting coefficients within the CDM group,
is a frequency-domain comb-like factor,
for the port corresponding to PRS sequence, the index is
The offset of the first subcarrier occupied in the OFDM symbol in the physical resource block relative to the preset subcarrier, k' is the relative index of the first subcarrier occupied by the positioning reference signal in the OFDM symbol with index l
Mod is a modulo operation,
the first OFDM symbol index occupied for positioning reference signals.
In one possible design, the resource position and the mapping value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource satisfy the formula six:
wherein the content of the first and second substances,
mapping values of positioning reference signals on ports corresponding to the PRS sequence at resource positions (k, l) in time-frequency resources, wherein p is a port index of the port corresponding to the PRS sequence, l is an OFDM symbol index, and beta isPRSIn order to be a power scaling factor,
is the CDM intra-group weighting coefficient of the port corresponding to the PRS sequence, r (m) is the PRS sequence, and m is the element index of the element in the PRS sequence.
In one possible design, the at least two ports include a first port and a second port,
is 0 or 1;
the following formula seven and formula eight are satisfied:
the CDM intra-group weighting coefficients corresponding to the first port are:
the CDM intra-group weighting coefficients for the second port are:
in a third aspect, an embodiment of the present invention provides a wireless transceiver device, including: memory, a processor and a computer program, the computer program being stored in the memory, the processor running the computer program to perform the method of any of the first aspects as described above.
In a fourth aspect, the present invention provides a computer-readable storage medium, which includes a computer program, and when executed by a processor, the computer program implements the method according to any one of the above first aspects.
The application provides a method, a device, equipment and a storage medium for sending a positioning reference signal, wherein the method for sending the positioning reference signal comprises the following steps: acquiring a PRS sequence corresponding to each port; determining a resource position and a mapping numerical value of a PRS sequence corresponding to each port in a time-frequency resource; and sending the PRS sequence corresponding to each port according to the resource position and the mapping numerical value of the PRS sequence corresponding to each port in the time-frequency resource. In the method, after determining the mapping value of the PRS sequence corresponding to each port in the time frequency resource; and sending the PRS sequence corresponding to each port according to the mapping numerical value of the PRS sequence corresponding to each port in the time-frequency resource, so that the positioning reference signal can be sent in a diversity mode, and the positioning accuracy of the terminal equipment is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of an application scenario of a method for transmitting a positioning reference signal according to the present application;
fig. 2 is a schematic flowchart of a method for transmitting a positioning reference signal according to the present application;
fig. 3 is a second flowchart of a method for transmitting a positioning reference signal according to the present application;
fig. 4 is a schematic structural diagram of a time-frequency resource provided in the present application;
fig. 5 is a schematic structural diagram of another time-frequency resource provided in the present application;
fig. 6 is a schematic structural diagram of a positioning reference signal transmitting apparatus according to an embodiment of the present invention;
fig. 7 is a schematic hardware structure diagram of a wireless transceiver device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," and "fourth" (if any) in the description and/or claims of this invention and the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, to solve a technical problem in the prior art that a terminal device cannot be accurately located due to a positioning reference signal being generated in a single port and being sent to the terminal device through the single port, the present application provides a sending method for a positioning reference signal. In the method for sending the positioning reference signal, the positioning reference signal is sent through at least two ports, so that the terminal equipment is accurately positioned. An application scenario of the method for transmitting a positioning reference signal according to the present application is described below with reference to fig. 1.
Fig. 1 is a schematic view of an application scenario of a method for sending a positioning reference signal according to the present application. As shown in fig. 1, the wireless transceiver device 10 includes at least two ports (e.g., a port 101 and a port 102), where at least two ports are antenna ports, and the wireless transceiver device 10 can respectively send PRS sequences to the terminal device 11 through the port 101 and the port 102, so as to send positioning reference signals to the terminal device, thereby improving accuracy of positioning the terminal device.
The technical means shown in the present application will be described in detail below with reference to specific examples. It should be noted that the following embodiments may be combined with each other, and the description of the same or similar contents in different embodiments is not repeated.
Fig. 2 is a flowchart illustrating a method for transmitting a positioning reference signal according to the present application. As shown in fig. 2, the method for transmitting a positioning reference signal includes:
s201: and acquiring a PRS sequence corresponding to each port.
Optionally, the execution subject of the embodiment of the present invention may be a wireless transceiver device, and may also be a positioning reference signal transmitting apparatus disposed in the wireless transceiver device, where the positioning reference signal transmitting apparatus may be implemented by a combination of software and/or hardware.
Specifically, the radio transceiver device may be a base station, and the radio transceiver device includes at least two ports, where PRS sequences corresponding to each port are the same.
The PRS sequence corresponding to each port can be obtained through the following formula one:
in formula one, r (m) is the PRS sequence corresponding to each port, m is the element index (which takes values of 0, 1, 2, 3, etc.) of the element in the PRS sequence corresponding to each port, c (i) is the Gold sequence with length of 31, and the initial sequence c isinitThe following formula two is satisfied:
in the formula two, the first and second groups of the formula,
is the sequence number (Identity, ID) of the PRS sequence,
the total number of Orthogonal Frequency Division Multiplexing (OFDM) symbols within a slot,
is the slot index, l is the OFDM symbol index within the slot, mod is the modulo operation.
S202: and determining the resource position and the mapping numerical value of the PRS sequence corresponding to each port in the time-frequency resource.
It should be noted that, the execution method for determining the resource position and the mapping value of the PRS sequence corresponding to each port in the time-frequency resource is the same. In particular, reference may be made to the embodiment of fig. 3 or fig. 4, which will not be described in detail herein.
S203: and sending the PRS sequence corresponding to each port according to the resource position and the mapping numerical value of the PRS sequence corresponding to each port in the time-frequency resource.
Optionally, the PRS sequence corresponding to each port may be sent in a channel with mutually perpendicular polarization directions according to a resource location and a mapping numerical value of the PRS sequence corresponding to each port in a time-frequency resource.
The number of channels with mutually perpendicular polarization directions is the same as the number of at least two ports.
For example, when the number of at least two ports is 2 (a first port and a second port, respectively), the first port corresponds to a first PRS sequence, and the second port corresponds to a second PRS sequence, the first PRS sequence may be transmitted through the first port on a channel having a first polarization direction, and the second PRS sequence may be transmitted through the second port on a channel having a second polarization direction, where the first polarization direction and the second polarization direction are perpendicular.
In the application, the PRS sequence is sent through the port corresponding to the PRS sequence, so that the positioning reference signal can be sent in a diversity mode, and the accuracy of positioning the terminal equipment is improved.
The method for sending the positioning reference signal provided by the embodiment of the application comprises the following steps: acquiring a PRS sequence corresponding to each port; determining a resource position and a mapping numerical value of a PRS sequence corresponding to each port in a time-frequency resource; and sending the PRS sequence corresponding to each port according to the resource position and the mapping numerical value of the PRS sequence corresponding to each port in the time-frequency resource. In the method, after determining the mapping value of the PRS sequence corresponding to each port in the time frequency resource; and sending the PRS sequence corresponding to each port according to the mapping numerical value of the PRS sequence corresponding to each port in the time-frequency resource, so that the positioning reference signal can be sent in a diversity mode, and the positioning accuracy of the terminal equipment is improved.
In the following, referring to the embodiment of fig. 3, taking the number of at least two ports as 2, and taking 2 ports as the first port and the second port respectively as an example, a method for sending a positioning reference signal provided in the present application is described, specifically, please refer to the embodiment of fig. 3.
Fig. 3 is a flowchart illustrating a second method for sending a positioning reference signal according to the present application. As shown in fig. 3, the method for transmitting a positioning reference signal includes:
s301: and acquiring a PRS sequence corresponding to the first port and a PRS sequence corresponding to the second port.
And the PRS sequence corresponding to the first port is the same as the PRS sequence corresponding to the second port.
Specifically, the PRS sequence corresponding to the first port and the PRS sequence corresponding to the second port may be obtained through the first formula and the second formula.
S302: and determining the resource position and the mapping numerical value of the PRS sequence corresponding to the first port in the time frequency resource and the resource position and the mapping numerical value of the PRS sequence corresponding to the second port in the time frequency resource.
It should be noted that, the resource position and the mapping numerical value of the PRS sequence corresponding to the first port in the time frequency resource and the resource position and the mapping numerical value of the PRS sequence corresponding to the second port in the time frequency resource are determined by the same method, here, the resource position and the mapping numerical value of the PRS sequence corresponding to each port in the time frequency resource are determined as a description.
In one possible design, determining a resource location and a mapping value of a PRS sequence corresponding to each port in a time-frequency resource includes:
acquiring a starting subcarrier index of a port corresponding to a PRS sequence on each OFDM symbol;
determining the subcarrier index of the port corresponding to the PRS sequence according to the initial subcarrier index of the port corresponding to the PRS sequence on each OFDM symbol;
and determining the resource position and the mapping numerical value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource according to the subcarrier index, the OFDM symbol index, the power scaling factor and the PRS sequence of the port corresponding to the PRS sequence.
In one possible design, the starting subcarrier index of the port corresponding to the PRS sequence on each OFDM symbol may satisfy the following formula three:
in formula three, k0For the port corresponding to PRS sequence, the index is
The starting sub-carrier index on the OFDM symbol of (a),
for the first port as indexed
The first sub-carrier occupied in the OFDM symbol of (1) is offset from a preset sub-carrier (i.e., sub-carrier 0) in the physical resource block.
Wherein the index is
Is the first of each OFDM symbol.
In another possible design, the starting subcarrier index of the port corresponding to the PRS sequence on each OFDM symbol may further satisfy the following formula four:
in the formula four, the first step is carried out,
is a frequency domain comb factor.
Specifically, according to the following feasible formula five, the starting subcarrier index k of the port corresponding to the PRS sequence on each OFDM symbol may be represented by0Determining the subcarrier index of the port corresponding to the PRS sequence:
in formula five, k is the subcarrier of the port corresponding to the PRS sequenceWave index, k' is the relative index of the first subcarrier occupied by the positioning reference signal in the OFDM symbol with index l
Mod is a modulo operation.
For example,
time, intra-slot OFDM symbol index
The corresponding values of k' are shown in table 1 below.
TABLE 1
For example,
time, intra-slot OFDM symbol index
The corresponding values of k' are shown in table 2 or table 3 below,
TABLE 2
TABLE 3
For example,
time, intra-slot OFDM symbol index
The corresponding values of k' are shown in table 4, table 5 or table 6 below,
TABLE 4
TABLE 5
TABLE 6
For example,
time, intra-slot OFDM symbol index
The values of k' are shown in tables 7, 8, 9 or 10,
TABLE 7
TABLE 8
TABLE 9
Further, the resource position and the mapping value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource may be determined according to the subcarrier index, the power scaling factor and the PRS sequence of the port corresponding to the PRS sequence by the following formula six:
in the formula six, the first step is carried out,
a mapping value of a PRS sequence on a port corresponding to the PRS sequence at a resource position (k, l) in a time-frequency resource is represented, p is a port index of the port corresponding to the PRS sequence, (k, l) is a resource position of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource, k is a subcarrier index (which can be determined by the formula five) of the port corresponding to the PRS sequence, l is an OFDM symbol index in a time slot, and l takes a value of
LPRSNumber of OFDM symbols, beta, occupied for positioning reference signalsPRSFor the power scaling factor, r (m) is the PRS sequence and m is the element index of the element in the PRS sequence.
It should be noted that, when the initial subcarrier index of the port corresponding to the PRS sequence on each OFDM symbol satisfies the third formula, if p is the port index of the first port, then p is the port index of the first port
If p is the port index of the second port, then
It should be noted that, when the starting subcarrier index of the port corresponding to the PRS sequence on each OFDM symbol satisfies the above formula four, if p is the port index of the first port, then p is the port index of the first port
If p is the port index of the second port, then
It should be noted that, according to the above possible design, a schematic diagram of time-frequency resources is exemplarily shown in the embodiment of fig. 4.
In another possible design, determining a resource location and a mapping value of a PRS sequence corresponding to each port in a time-frequency resource includes:
acquiring subcarrier indexes of ports corresponding to the PRS sequences on each OFDM symbol;
acquiring a CDM group internal weighting coefficient of a port corresponding to the PRS sequence;
and determining the resource position and the mapping numerical value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource according to the subcarrier index, the OFDM symbol index, the power scaling factor, the weighting coefficient in the CDM group of the port corresponding to the PRS sequence and the PRS sequence.
Wherein, the subcarrier index of the port corresponding to the PRS sequence satisfies the formula seven:
in formula seven, k is the subcarrier index of the port corresponding to the PRS sequence on each OFDM symbol, m is the element index of the element in the PRS sequence,
is indexed for the weighting coefficients within the CDM group,
is a frequency-domain comb-like factor,
for the port corresponding to PRS sequence, the index is
The offset of the first subcarrier occupied in the OFDM symbol in the physical resource block relative to the preset subcarrier, k' is the relative index of the first subcarrier occupied by the positioning reference signal in the OFDM symbol with index l
Mod is a modulo operation,
the first OFDM symbol index occupied for positioning reference signals.
Wherein the content of the first and second substances,
is 0 or 1; CDM intra-group weighting coefficients of ports corresponding to PRS sequences
The following formula eight and formula nine are satisfied:
the CDM intra-group weighting coefficients corresponding to the first port are:
the CDM intra-group weighting coefficients for the second port are:
optionally, according to the above formula eight and formula nine, the PRS sequences correspond to each otherThe intra-CDM group weighting coefficients of the port
And a first port, a second port, and
the relationship therebetween can be as shown in table 11 below.
TABLE 11
Specifically, the mapping numerical value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource satisfies the formula ten:
in the formula ten, wherein,
mapping values of positioning reference signals on ports corresponding to the PRS sequence at resource positions (k, l) in time-frequency resources, wherein p is a port index of the port corresponding to the PRS sequence, l is an OFDM symbol index, and beta isPRSIn order to be a power scaling factor,
is the CDM intra-group weighting coefficient of the port corresponding to the PRS sequence, r (m) is the PRS sequence, and m is the element index of the element in the PRS sequence.
It should be noted that, according to another possible design described above, a schematic diagram of time-frequency resources is exemplarily shown in the embodiment of fig. 5.
S303: according to the resource position and the mapping numerical value of the PRS sequence corresponding to the first port in the time frequency resource, the PRS sequence corresponding to the first port is sent through the first port on a channel with a first polarization direction, and according to the resource position and the mapping numerical value of the PRS sequence corresponding to the second port in the time frequency resource, the PRS sequence corresponding to the second port is sent through the second port on a channel with a second polarization direction, wherein the first polarization direction and the second polarization direction are perpendicular to each other.
Specifically, the execution method of S305 is the same as the execution method of S203, and the execution process of S305 is not described herein again.
The method for sending the positioning reference signal comprises the following steps: acquiring a PRS sequence corresponding to a first port and a PRS sequence corresponding to a second port; determining a resource position and a mapping numerical value of a PRS sequence corresponding to the first port in a time frequency resource, and a resource position and a mapping numerical value of a PRS sequence corresponding to the second port in the time frequency resource; and sending the PRS sequence corresponding to the first port on a channel with a first polarization direction according to the resource position and the mapping numerical value of the PRS sequence corresponding to the first port in the time-frequency resource, and sending the PRS sequence corresponding to the second port on a channel with a second polarization direction according to the resource position and the mapping numerical value of the PRS sequence corresponding to the second port in the time-frequency resource, wherein the first polarization direction and the second polarization direction are vertical to each other. In the method, after determining a mapping value of a PRS sequence corresponding to a first port in a time-frequency resource and a mapping value of a PRS sequence corresponding to a second port in the time-frequency resource, according to the mapping value of the PRS sequence corresponding to the first port in the time-frequency resource, the PRS sequence corresponding to the first port is transmitted through the first port on a channel having a first polarization direction, and according to the mapping value of the PRS sequence corresponding to the second port in the time-frequency resource, the PRS sequence corresponding to the second port is transmitted through the second port on the channel having a second polarization direction, so that a positioning reference signal can be transmitted in a diversity manner, and the positioning accuracy of terminal equipment is improved.
Further, in this application, the first port and the second port have respective corresponding PRS sequences and mapping values of the PRS sequences in time-frequency resources, so that the PRS sequence corresponding to the first port may be transmitted through the first port on a channel having a first polarization direction, and after the PRS sequence corresponding to the second port is transmitted through the second port on a channel having a second polarization direction, Line of Sight (Sight)/LOS Non-Line of Sight (Non Line of Sight) NLOS state identification of the channel may be achieved by comparing attenuation conditions of the PRS sequences in the two polarization directions.
Fig. 4 is a schematic structural diagram of a physical resource block provided in the present application. As shown in fig. 4, includes:
the corresponding physical resource block,
The corresponding physical resource block,
Corresponding two physical resource blocks. In each of the above physical resource blocks, each OFDM symbol includes an element in the PRS sequence corresponding to each of the first port and the second port, as shown in fig. 4.
It should be noted that, in practical applications, for example,
there may be a plurality of corresponding physical resource blocks
Corresponding physical resource block composition
And corresponding time frequency resources.
Fig. 5 is a schematic structural diagram of another physical resource block provided in the present application. As shown in fig. 5, includes:
corresponding two physical resource blocks,
Corresponding physical resource blocks. In each time frequency resource, each OFDM symbol includes the secondThe port and the second port each correspond to an element in the PRS sequence as shown in fig. 5.
It should be noted that, in practical applications, for example,
there may be a plurality of corresponding physical resource blocks
Corresponding physical resource block composition
And corresponding time frequency resources.
Fig. 6 is a schematic structural diagram of a device for sending a positioning reference signal according to an embodiment of the present invention. The sending device 60 of the positioning reference signal is applied to a wireless transceiver device, and the wireless transceiver device comprises at least two ports. As shown in fig. 6, the positioning reference signal transmitting apparatus 60 includes: an acquisition module 61, a determination module 62 and a sending module 63, wherein,
the obtaining module 61 is configured to obtain a PRS sequence corresponding to each port;
the determining module 62 is configured to determine a resource location and a mapping numerical value of the PRS sequence corresponding to each port in the time-frequency resource;
the sending module 63 is configured to send the PRS sequence corresponding to each port according to the resource location and the mapping numerical value of the PRS sequence corresponding to each port in the time-frequency resource.
The apparatus provided in this embodiment may be used to implement the method embodiments described above, and the implementation principle and technical effect are similar, which are not described herein again.
In one possible design, the determination module 62 is specifically configured to:
acquiring a starting subcarrier index of a port corresponding to a PRS sequence on each OFDM symbol;
determining the subcarrier index of the port corresponding to the PRS sequence according to the initial subcarrier index of the port corresponding to the PRS sequence on each OFDM symbol;
and determining the resource position and the mapping numerical value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource according to the subcarrier index, the OFDM symbol index, the power scaling factor and the PRS sequence of the port corresponding to the PRS sequence.
In one possible design, the subcarrier index of the port corresponding to the PRS sequence satisfies formula one:
wherein k is a subcarrier index of a port corresponding to the PRS sequence, m is an element index of an element in the PRS sequence,
is a frequency domain comb factor, k0For the port corresponding to PRS sequence, the index is
K' is the relative index of the first subcarrier occupied by the positioning reference signal in the OFDM symbol with index l
The offset of the first sub-carrier occupied by the positioning reference signal in the OFDM symbol of (1),
mod is the modulo operation for the first OFDM symbol index occupied by the positioning reference signal.
In one possible design, the at least two ports include a first port and a second port; k is a radical of0The formula II is satisfied:
wherein the content of the first and second substances,
is a first portAt an index of
The offset of the first subcarrier occupied in the OFDM symbol in the physical resource block relative to the preset subcarrier.
In one possible design, the at least two ports include a first port and a second port, k0The formula three is satisfied:
wherein the content of the first and second substances,
for the first port as indexed
The offset of the first subcarrier occupied in the OFDM symbol in the physical resource block relative to the preset subcarrier.
In one possible design, the resource position and the mapping value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource satisfy the formula four:
wherein the content of the first and second substances,
mapping values of positioning reference signals at resource positions (k, l) in time-frequency resources on ports corresponding to the PRS sequence, p is port index of the ports corresponding to the PRS sequence, l is OFDM symbol index, and betaPRSFor the power scaling factor, r (m) is the PRS sequence and m is the element index of the element in the PRS sequence.
In one possible design, the determination module 62 is specifically configured to:
acquiring subcarrier indexes of ports corresponding to the PRS sequences on each OFDM symbol;
acquiring a CDM group internal weighting coefficient of a port corresponding to the PRS sequence;
and determining the resource position and the mapping numerical value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource according to the subcarrier index, the OFDM symbol index, the power scaling factor, the CDM group internal weighting coefficient of the port corresponding to the PRS sequence and the PRS sequence on each OFDM symbol of the port corresponding to the PRS sequence.
In one possible design, the subcarrier index of the port corresponding to the PRS sequence on each OFDM symbol satisfies the formula five:
wherein k is a subcarrier index of a port corresponding to the PRS sequence on each OFDM symbol, m is an element index of an element in the PRS sequence,
is indexed for the weighting coefficients within the CDM group,
is a frequency-domain comb-like factor,
for the port corresponding to PRS sequence, the index is
The offset of the first subcarrier occupied in the OFDM symbol in the physical resource block relative to the preset subcarrier, k' is the relative index of the first subcarrier occupied by the positioning reference signal in the OFDM symbol with index l
Mod is a modulo operation,
to be fixedThe bit reference signal occupies the first OFDM symbol index.
In one possible design, the resource position and the mapping value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource satisfy the formula six:
wherein the content of the first and second substances,
mapping values of positioning reference signals on ports corresponding to the PRS sequence at resource positions (k, l) in time-frequency resources, wherein p is a port index of the port corresponding to the PRS sequence, l is an OFDM symbol index, and beta isPRSIn order to be a power scaling factor,
is the CDM intra-group weighting coefficient of the port corresponding to the PRS sequence, r (m) is the PRS sequence, and m is the element index of the element in the PRS sequence.
In one possible design, the at least two ports include a first port and a second port,
is 0 or 1;
the following formula seven and formula eight are satisfied:
the CDM intra-group weighting coefficients corresponding to the first port are:
the CDM intra-group weighting coefficients for the second port are:
fig. 7 is a schematic hardware structure diagram of a wireless transceiver device according to an embodiment of the present invention. As shown in fig. 7, the radio transmitting and receiving device 70 of the present embodiment includes: a processor 71 and a memory 72; a memory 72 for storing a computer program; the processor 71 is configured to execute the computer program stored in the memory to implement the policy data processing method in the above embodiments. Reference may be made in particular to the description relating to the method embodiments described above.
Alternatively, the memory 72 may be separate or integrated with the processor 71.
When the memory 72 is a device separate from the processor 71, the wireless transceiving device 70 may further include: a bus 73 for connecting the memory 72 and the processor 71.
The wireless transceiver device provided in this embodiment may be configured to execute the technical solution in any of the above method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
The embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium includes a computer program, and the computer program is used for implementing the technical solution in any of the above method embodiments when executed by a processor.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
Modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present application may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one unit. The unit formed by the modules can be realized in a hardware form, and can also be realized in a form of hardware and a software functional unit.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions for enabling a computer device (which may be a personal computer, a wireless transceiver device, or a network device) or a processor (processor) to perform some steps of the methods according to the embodiments of the present application.
It should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in the incorporated application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
The storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the storage medium may reside as discrete components in an electronic device or host device.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have 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 still be modified, or some or all of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (13)
1. A method for transmitting a positioning reference signal, the method being applied to a radio transceiver device, the radio transceiver device comprising at least two ports, the method comprising:
acquiring a PRS sequence corresponding to each port;
determining a resource position and a mapping numerical value of the PRS sequence corresponding to each port in time-frequency resources;
and sending the PRS sequence corresponding to each port according to the resource position and the mapping numerical value of the PRS sequence corresponding to each port in the time-frequency resource.
2. The method of claim 1, wherein determining a resource location and a mapping value of the PRS sequence corresponding to each port in the time-frequency resources comprises:
acquiring a starting subcarrier index of a port corresponding to the PRS sequence on each OFDM symbol;
determining the subcarrier index of the port corresponding to the PRS sequence according to the initial subcarrier index of the port corresponding to the PRS sequence on each OFDM symbol;
and determining the resource position and the mapping numerical value of the PRS sequence on the port corresponding to the PRS sequence in time-frequency resources according to the subcarrier index, the OFDM symbol index, the power scaling factor and the PRS sequence of the port corresponding to the PRS sequence.
3. The method of claim 2, wherein the subcarrier index of the port corresponding to the PRS sequence satisfies formula one:
wherein k is a subcarrier index of a port corresponding to the PRS sequence, m is an element index of an element in the PRS sequence,
is a frequency domain comb factor, k0The port corresponding to the PRS sequence is indexed by
K' is the relative index of the first subcarrier occupied by the positioning reference signal in the OFDM symbol with index l
The offset of the first sub-carrier occupied by the positioning reference signal in the OFDM symbol of (1),
mod is the modulo operation for the first OFDM symbol index occupied by the positioning reference signal.
4. The method of claim 3, wherein the at least two ports comprise a first port and a second port; k is0The formula II is satisfied:
wherein the content of the first and second substances,
for the first port is indexed as
The offset of the first subcarrier occupied in the OFDM symbol in the physical resource block relative to the preset subcarrier.
5. The method of claim 3, wherein the at least two ports comprise a first port and a second port, and wherein k is the number of ports0The formula three is satisfied:
wherein the content of the first and second substances,
for the first port is indexed as
The offset of the first subcarrier occupied in the OFDM symbol in the physical resource block relative to the preset subcarrier.
6. The method according to claim 4 or 5, wherein a resource location and a mapping value of the PRS sequence in a time-frequency resource on a port corresponding to the PRS sequence satisfy formula four:
wherein the content of the first and second substances,
mapping values of positioning reference signals at resource positions (k, l) in time-frequency resources on ports corresponding to the PRS sequence, p is a port index of the port corresponding to the PRS sequence, l is the OFDM symbol index, and betaPRSFor a power scaling factor, r (m) is the PRS sequence, and m is an element index of an element in the PRS sequence.
7. The method of claim 1, wherein determining a resource location and a mapping value of the PRS sequence corresponding to each port in the time-frequency resources comprises:
acquiring a subcarrier index of a port corresponding to the PRS sequence on each OFDM symbol;
obtaining a CDM group internal weighting coefficient of a port corresponding to the PRS sequence;
and determining the resource position and the mapping numerical value of the PRS sequence on the port corresponding to the PRS sequence in the time-frequency resource according to the subcarrier index, the OFDM symbol index, the power scaling factor, the CDM group internal weighting coefficient of the port corresponding to the PRS sequence and the PRS sequence on the port corresponding to the PRS sequence.
8. The method of claim 7, wherein a subcarrier index of a port corresponding to the PRS sequence on each OFDM symbol satisfies formula five:
wherein k is a subcarrier index of a port corresponding to the PRS sequence on each OFDM symbol, m is an element index of an element in the PRS sequence,
is indexed for the weighting coefficients within the CDM group,
is a frequency-domain comb-like factor,
for the port corresponding to PRS sequence, the index is
The offset of the first subcarrier occupied in the OFDM symbol in the physical resource block relative to the preset subcarrier, k' is the relative index of the first subcarrier occupied by the positioning reference signal in the OFDM symbol with index l
Mod is a modulo operation，
The first OFDM symbol index occupied for positioning reference signals.
9. The method of claim 8, wherein a resource location and a mapping value of the PRS sequence in a time-frequency resource on a port corresponding to the PRS sequence satisfy formula six:
wherein the content of the first and second substances,
mapping values of positioning reference signals on ports corresponding to the PRS sequence at resource positions (k, l) in time-frequency resources, p is a port index of the port corresponding to the PRS sequence, l is the OFDM symbol index, and betaPRSIn order to be a power scaling factor,
a CDM intra-group weighting coefficient for a port corresponding to the PRS sequence, r (m) is the PRS sequence, and m is an element index of an element in the PRS sequence.
10. The method of claim 9, wherein the at least two ports comprise a first port and a second port,
is 0 or 1; the above-mentioned
The following formula seven and formula eight are satisfied:
the CDM group internal weighting coefficient corresponding to the first port is as follows:
the CDM group internal weighting coefficient corresponding to the second port is as follows:
11. an apparatus for transmitting a positioning reference signal, the apparatus being applied to a wireless transceiver device, the wireless transceiver device including at least two ports, the apparatus comprising: an acquisition module, a determination module and a sending module, wherein,
the acquisition module is used for acquiring a PRS sequence corresponding to each port;
the determining module is configured to determine a resource location and a mapping numerical value of the PRS sequence corresponding to each port in a time-frequency resource;
and the sending module is used for sending the PRS sequence corresponding to each port according to the resource position and the mapping numerical value of the PRS sequence corresponding to each port in the time frequency resource.
12. A wireless transceiving device, comprising: memory, a processor and a computer program, the computer program being stored in the memory, the processor running the computer program to perform the method of any of claims 1 to 10.
13. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a computer program which, when executed by a processor, implements the method of any one of claims 1 to 10.
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