CN111669257B

CN111669257B - PRS frequency domain resource mapping method, device and storage medium

Info

Publication number: CN111669257B
Application number: CN201910172085.4A
Authority: CN
Inventors: 黄甦; 史桢宇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-03-07
Filing date: 2019-03-07
Publication date: 2021-12-10
Anticipated expiration: 2039-03-07
Also published as: WO2020177521A1; CN111669257A

Abstract

The embodiment of the application provides a frequency domain resource mapping method and device of PRS and a storage medium, which are used for solving the coordination problem of reference signal resources among networks of different systems when deployment of PRS is sent by cell co-frequency bands of the networks of different systems. Wherein, the method comprises the following steps: the network equipment acquires the information of the first frequency point and the PRS configuration information corresponding to the PRS, and sends the information of the first frequency point and the PRS configuration information corresponding to the PRS to the terminal equipment through the auxiliary information, and the terminal equipment determines a resource mapping position on a frequency domain when the PRS is received and sent according to the received auxiliary information, and receives the PRS sent by the network equipment of the second standard at the resource mapping position.

Description

PRS frequency domain resource mapping method, device and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a frequency domain resource mapping method and apparatus for PRS, and a storage medium.

Background

With the continuous development of communication technology, communication between a terminal and a network node has become a common inter-device communication. It is increasingly important that network nodes locate terminals or that terminals request location services to implement specific applications. In the fifth generation mobile communication (5th generation mobile networks or 5th generation wireless systems, 5G), the requirement of the New Radio (NR) for the positioning accuracy will be higher. Similar to the conventional Long Term Evolution (LTE) system, the 5G system will also use a Positioning Reference Signal (PRS) to position the terminal.

For a 5G system, an operator may deploy a cell of a New Radio (NR) system on a spectrum of an existing LTE system, and gradually replace the cell of the LTE system, so as to upgrade the network. Thus, LTE and NR cells of the same operator may co-exist on the same segment of spectrum for a longer period of time.

In the prior art, due to the coexistence of the LTE cell and the NR cell, a resource coordination problem between the LTE system and the NR system is caused.

Disclosure of Invention

The embodiment of the application provides a frequency domain resource mapping method and device of a PRS (general purpose radio), and a storage medium, so as to solve the problem of resource coordination between an LTE (Long term evolution) system and an NR (noise-and-noise) system.

A first aspect of the present application provides a frequency domain resource mapping method for PRS, which is applicable to a terminal device, and the method includes: the terminal equipment receives auxiliary information sent by the network equipment, wherein the auxiliary information comprises: the method comprises the steps that PRS configuration information corresponding to PRS and information of a first frequency point are obtained, the auxiliary information is used for indicating offset information of the PRS on frequency domain resources, the first frequency point is a downlink frequency point of a cell of a first standard network, a resource mapping position on a frequency domain when the PRS is received and sent is determined according to the auxiliary information, and the PRS sent by second standard network equipment is received on the resource mapping position.

In this embodiment, the terminal device can accurately determine the resource mapping position after the positioning reference signal offset based on the received auxiliary information, so that the problem of reducing the number of frequency division multiplexing cells when deployment of PRS is performed on the cell co-frequency bands of networks of different systems, resource waste is avoided, and the problem of resource coordination between an LTE system and an NR system is solved.

In this embodiment, the network device may send the information of the first frequency point to the terminal device in an explicit configuration manner, so that the terminal device may obtain the information of the first frequency point and the PRS configuration information by analyzing the received auxiliary information, thereby reducing the processing time of the terminal device and improving the frequency domain resource mapping efficiency.

In a possible design of the first aspect, the auxiliary information further includes: a frequency offset of the PRS.

In this embodiment, the frequency offset of the PRS may be used to indicate the number of subcarriers that need to be shifted on the right side of the first frequency point when the PRS is mapped onto the frequency domain, so that the terminal device may directly determine the frequency offset of the PRS, thereby reducing the processing time.

In another possible design of the first aspect, the information of the first frequency point is included in the PRS configuration information.

In this embodiment, the network device sends the information of the first frequency point to the terminal device in an implicit configuration manner, that is, the information of the first frequency point is included in the PRS configuration information, and then the PRS configuration information is sent to the terminal device through the auxiliary information, so that the communication security can be improved. The implementation mode does not need to explicitly configure the information of the first frequency point, and saves signaling overhead compared with the mode of displaying the information of the first frequency point.

In yet another possible design of the first aspect, the determining, according to the assistance information, a resource mapping location on a frequency domain when the PRS is transceived includes:

determining a target resource index corresponding to the first frequency point according to the information of the first frequency point in the auxiliary information, wherein the target resource index is used for indicating the mapping resource position of the first frequency point on a frequency domain;

determining a first resource index set corresponding to the PRS according to the PRS configuration information in the auxiliary information, wherein the first resource index set comprises: common resource block CRB indexes occupied by the PRS and resource element RE indexes in each CRB;

and determining a second resource index set after the PRS is shifted on the frequency domain resource according to the target resource index and the first resource index set, wherein the second resource index set is used for indicating a resource mapping position on a frequency domain when the PRS is received and transmitted.

In this embodiment, both the network device and the terminal device of the second standard for positioning may accurately determine the second resource index set after the PRS is shifted on the frequency domain resource according to the determined information of the first frequency point and the PRS configuration information, which lays a foundation for subsequently receiving and transmitting the PRS at the determined position, thereby avoiding the reduction of the number of cells capable of frequency division multiplexing.

Optionally, the second resource index set is implemented in any one of the following manners:

or

Wherein Q is₂Representing said second set of resource indices, Q₁Represents the first set of resource indices, k represents the Q₂Resource index of (1), k₁Is said Q₁The index of the resource(s) in (2),

for the purpose of indexing the target resource,

is the number of REs in one resource block RB,

and

respectively a minimum CRB index and a maximum CRB index of the bandwidth occupied by the PRS,

and representing a set of CRB indexes occupied by the PRS, wherein n is the frequency offset of the PRS.

In this embodiment, the second resource index set may be implemented by multiple possible implementation manners, and the terminal device and the network device may receive and transmit PRS at a resource mapping position corresponding to the second resource index set, so that the problem of resource coordination between the LTE system and the NR system is solved.

In yet another possible design of the first aspect, the network device includes: the system comprises network equipment of a second standard and a location management function LMF.

A second aspect of the present application provides a frequency domain resource mapping method for PRS, which is applicable to a network device, and the method includes: the method comprises the steps that network equipment acquires information of a first frequency point and PRS configuration information corresponding to a positioning reference signal PRS, wherein the first frequency point is a downlink frequency point of a cell of a first standard network, and auxiliary information is sent to terminal equipment, and the auxiliary information comprises the following steps: the PRS configuration information and the information of the first frequency point, wherein the auxiliary information is used for indicating offset information of the PRS on frequency domain resources.

In this embodiment, the network device sends the information of the first frequency point and the PRS configuration information corresponding to the PRS to the terminal device, so that the terminal device can accurately determine the resource mapping position after the positioning reference signal is offset based on the received auxiliary information, thereby solving the problem of reducing the number of frequency division multiplexing cells when the cells of different standard networks deploy and send PRSs on the same frequency band, avoiding resource waste, and solving the problem of resource coordination between the LTE system and the NR system.

In one possible design of the second aspect, the auxiliary information further includes: a frequency offset of the PRS.

In another possible design of the second aspect, the information of the first frequency point is included in the PRS configuration information.

In yet another possible design of the second aspect, the method further includes:

determining a resource mapping position on a frequency domain when the PRS receives and transmits according to the auxiliary information;

and sending the PRS to the terminal equipment at the resource mapping position.

In the foregoing possible design of the second aspect, the determining, according to the assistance information, a resource mapping location on a frequency domain during the PRS transceiving includes:

or

Or

Or

for the purpose of indexing the target resource,

is the number of REs in one resource block RB,

and

In yet another possible design of the second aspect, the network device includes: the system comprises network equipment of a second standard and a location management function LMF.

In another possible design of the second aspect, the acquiring information of the first frequency point and PRS configuration information corresponding to a positioning reference signal PRS includes:

and the second standard network equipment acquires the PRS configuration information configured by the LMF and the information of the first frequency point.

and the LMF sends the PRS configuration information and the information of the first frequency point to the network equipment of the second standard.

and the LMF acquires PRS configuration information configured by the network equipment of the second standard and information of the first frequency point.

For the beneficial technical effects of the second aspect, which are not elaborated in detail in the possible designs, reference may be made to the description of the first aspect, and further description is omitted here.

A third aspect of the present application provides a frequency domain resource mapping apparatus for PRS, including: a transceiver module and a processing module;

the transceiver module is configured to receive auxiliary information sent by a network device, where the auxiliary information includes: positioning PRS configuration information corresponding to a reference signal PRS and information of a first frequency point, wherein the auxiliary information is used for indicating offset information of the PRS on a frequency domain resource, and the first frequency point is a downlink frequency point of a cell of a first standard network;

the processing module is configured to determine, according to the auxiliary information received by the transceiver module, a resource mapping position on a frequency domain during the PRS transceiving;

the transceiver module is further configured to receive the PRS sent by the network device of the second system at the resource mapping position determined by the processing module.

In a possible design of the third aspect, the side information further includes: a frequency offset of the PRS.

In another possible design of the third aspect, the information of the first frequency point is included in the PRS configuration information.

In yet another possible design of the third aspect, the processing module is specifically configured to determine, according to the information of the first frequency point in the auxiliary information, a target resource index corresponding to the first frequency point, where the target resource index is used to indicate a mapping resource position of the first frequency point on a frequency domain, and determine, according to the PRS configuration information in the auxiliary information, a first resource index set corresponding to the PRS, where the first resource index set includes: the common resource block CRB index occupied by the PRS and the resource element RE index in each CRB are used for determining a second resource index set after the PRS is shifted on frequency domain resources according to the target resource index and the first resource index set, wherein the second resource index set is used for indicating the resource mapping position on the frequency domain when the PRS is received and transmitted.

or

Or

Or

for the purpose of indexing the target resource,

is the number of REs in one resource block RB,

and

In yet another possible design of the third aspect, the network device includes: the system comprises network equipment of a second standard and a location management function LMF.

A fourth aspect of the present application provides a frequency domain resource mapping apparatus for PRS, including: the device comprises an acquisition module and a transceiver module;

the acquisition module is used for acquiring information of a first frequency point and PRS configuration information corresponding to a positioning reference signal PRS, wherein the first frequency point is a downlink frequency point of a cell of a first standard network;

the transceiver module is configured to send auxiliary information to a terminal device, where the auxiliary information includes: the PRS configuration information and the information of the first frequency point, wherein the auxiliary information is used for indicating offset information of the PRS on frequency domain resources.

In one possible design of the fourth aspect, the auxiliary information further includes: a frequency offset of the PRS.

In another possible design of the fourth aspect, the information of the first frequency point is included in the PRS configuration information.

In yet another possible design of the fourth aspect, the apparatus further includes: a processing module;

the processing module is configured to determine, according to the auxiliary information, a resource mapping position on a frequency domain when the PRS is transmitted and received;

the transceiver module is further configured to send the PRS to the terminal device at the resource mapping position determined by the processing module.

In the above possible design of the fourth aspect, the processing module is specifically configured to determine, according to the information of the first frequency point in the auxiliary information, a target resource index corresponding to the first frequency point, where the target resource index is used to indicate a mapping resource position of the first frequency point on a frequency domain, and determine, according to the PRS configuration information in the auxiliary information, a first resource index set corresponding to the PRS, where the first resource index set includes: the common resource block CRB index occupied by the PRS and the resource element RE index in each CRB are used for determining a second resource index set after the PRS is shifted on frequency domain resources according to the target resource index and the first resource index set, wherein the second resource index set is used for indicating the resource mapping position on the frequency domain when the PRS is received and transmitted.

or

Or

Or

for the purpose of indexing the target resource,

is the number of REs in one resource block RB,

and

In yet another possible design of the fourth aspect, the apparatus is applied to a network device of the second system and a location management function LMF.

In another possible design of the fourth aspect, when the apparatus is applied to the network device of the second standard, the obtaining module is specifically configured to obtain the PRS configuration information configured by the LMF and the information of the first frequency point.

In another possible design of the fourth aspect, when the apparatus is applied to the LMF, the transceiver module is further configured to send the PRS configuration information and the information of the first frequency point to the network device of the second standard.

In another possible design of the fourth aspect, when the apparatus is applied to the LMF, the obtaining module is specifically configured to obtain PRS configuration information configured by the network device of the second standard and information of the first frequency point.

For the beneficial technical effects of the third aspect and the fourth aspect, which are not elaborated in detail in the respective possible designs, reference may be made to the descriptions in the first aspect and the second aspect, and details are not described here.

Optionally, in a possible design of the first aspect to the fourth aspect, the information of the first frequency point is an absolute radio channel number ARFCN of a network cell of the second standard corresponding to the frequency of the first frequency point.

In this embodiment of the present application, since the ARFCN may be used to identify the number of the special radio frequency channel, taking the ARFCN of the second-standard network cell corresponding to the frequency of the first frequency point as the information of the first frequency point may improve the capability of the terminal device to identify the first frequency point. Therefore, a plurality of second standard network cells can share the frequency of one first frequency point, and signaling cost is saved.

In another possible design of the first aspect to the fourth aspect, the information of the first frequency point is applicable to a plurality of cells for positioning, or the information of the first frequency point is applicable to one cell for positioning.

Optionally, when the information of the first frequency point is applicable to a cell for positioning, the information of the first frequency point is represented in any one of the following forms:

the information of the first frequency point is a public resource block (CRB) index corresponding to the frequency of the first frequency point and an RE index in the CRB corresponding to the CRB index, and the CRB is positioned on a downlink carrier of the cell for positioning;

or

The information of the first frequency point is a CRB index corresponding to the frequency of the first frequency point, and the CRB corresponding to the CRB index is located on the downlink carrier of the cell for positioning, where an RE index in the CRB is a preset value, and the preset value is a preset fixed value or a value determined based on the information of the cell for positioning;

or

The information of the first frequency point is a resource index of the frequency of the first frequency point relative to a second frequency point, and the second frequency point is the point A of the cell for positioning.

In this embodiment, the information of the first frequency point is represented by the cell for positioning, so that signaling overhead is saved more than that represented by using ARFCN.

Optionally, if the information of the first frequency point is applicable to a plurality of cells for positioning, and one of the plurality of cells for positioning is a main serving cell, the information of the first frequency point is represented in any one of the following forms:

the information of the first frequency point is a CRB index corresponding to the frequency of the first frequency point and an RE index in the CRB corresponding to the CRB index, and the CRB is positioned on a downlink carrier of the main service cell;

or

The first frequency point information is a CRB index corresponding to the frequency of the first frequency point, and the CRB corresponding to the CRB index is located on a downlink carrier of a main serving cell, wherein the RE index in the CRB is a preset value, and the preset value is a preset fixed value or a value determined based on the information of the main serving cell;

or

The first frequency point information is a resource index of the frequency of the first frequency point relative to a second frequency point, and the second frequency point is a point A of the main service cell.

In this embodiment, the information of the first frequency point is represented by an index in the main serving cell and is applicable to multiple cells, thereby further saving overhead.

Optionally, if the information of the first frequency point is applicable to a plurality of cells for positioning, and the plurality of cells for positioning include a serving cell of the network device, the information of the first frequency point is represented in any one of the following forms:

the information of the first frequency point is a CRB index corresponding to the frequency of the first frequency point and an RE index in a CRB corresponding to the CRB index, and the CRB is positioned on a downlink carrier of the serving cell;

or

The information of the first frequency point is a CRB index corresponding to the frequency of the first frequency point, and the CRB corresponding to the CRB index is located on a downlink carrier of the serving cell, where an RE index in the CRB is a preset value, and the preset value is a preset fixed value or a value determined based on the information of the serving cell;

or

The first frequency point information is a resource index of the frequency of the first frequency point relative to a second frequency point, and the second frequency point is a point A of the serving cell.

In this embodiment, the information of the first frequency point is represented by the index of the serving cell of the network device, which not only can save overhead, but also can extend any serving cell, and the applicability is wider.

A fifth aspect of the present application provides an apparatus for frequency domain resource mapping of PRSs, comprising a processor, a memory, and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the program, implements the method as described in the first aspect and various possible designs of the first aspect.

A sixth aspect of the present application provides an apparatus for frequency domain resource mapping of PRS, comprising a processor, a memory and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the program, implements the method as set forth in the second aspect and various possible designs of the second aspect.

A seventh aspect of the present application provides a storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform the method as set forth in the first aspect above and in various possible designs of the first aspect.

An eighth aspect of the present application provides a storage medium having stored therein instructions that, when run on a computer, cause the computer to perform the method as described above in the second aspect and in various possible designs of the second aspect.

A ninth aspect of the present application provides a program product comprising instructions which, when run on a computer, cause the computer to perform the method as described in the first aspect above and in various possible designs of the first aspect.

A tenth aspect of the present application provides a program product comprising instructions which, when run on a computer, cause the computer to perform the method as described above in the second aspect and in various possible designs of the second aspect.

An eleventh aspect of the present application provides a chip comprising a memory, a processor, the memory storing code and data, the memory being coupled to the processor, the processor executing the code in the memory such that the chip is adapted to perform the method as described above in the first aspect and in various possible designs of the first aspect.

A twelfth aspect of the present application provides a chip comprising a memory, a processor, the memory storing code and data, the memory being coupled to the processor, the processor executing the code in the memory such that the chip is adapted to perform the method as described above in the second aspect and in various possible designs of the second aspect.

A thirteenth aspect of the present application provides a communication system comprising: the system comprises terminal equipment, second-system network equipment, an LMF (local mean function) and first-system network equipment;

the terminal device is the apparatus described in the third aspect and the various possible designs of the third aspect;

the network device of the second standard and the LMF are apparatuses described in the fourth aspect and various possible designs of the fourth aspect.

According to the frequency domain resource mapping method, device and storage medium of the PRS, the network equipment acquires the information of the first frequency point and the PRS configuration information corresponding to the PRS, and sends the information of the first frequency point and the PRS configuration information corresponding to the PRS to the terminal equipment through the auxiliary information, the terminal equipment determines the resource mapping position on the frequency domain when the PRS is received and sent according to the received auxiliary information, and receives the PRS sent by the network equipment of the second system at the resource mapping position, namely the terminal equipment can determine the resource mapping position after the offset of the positioning reference signal based on the indication of the auxiliary information, the problem that the number of frequency division multiplexing cells is reduced when the PRS is sent by the co-frequency deployment of the cells of networks of different systems is solved, namely, the resource coordination problem between an LTE system and an NR system is solved.

Drawings

Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of another communication system according to an embodiment of the present application;

fig. 3 is a resource mapping diagram of a downlink signal in an LTE system after modulation in a frequency domain;

fig. 4 is a schematic diagram of an up-conversion process of a downlink signal of an LTE cell;

fig. 5 is a resource mapping diagram of a frequency domain after modulation of a downlink signal in an NR system;

fig. 6 is a schematic resource distribution diagram of LTE positioning reference signal and NR positioning reference signal frequency division multiplexing;

FIG. 7 is a schematic diagram of resource mapping of positioning reference signals of PRS and NR of LTE in a time-frequency domain;

fig. 8 is an interaction diagram of a frequency domain resource mapping method for PRS according to a first embodiment of the present application;

fig. 9 is a flowchart illustrating a second embodiment of a frequency domain resource mapping method for PRS according to an embodiment of the present application;

fig. 10A is a schematic diagram of resource distribution of a first resource index set and a second resource index set through a first possible implementation manner;

fig. 10B is a schematic diagram of resource distribution of the first resource index set and the second resource index set through a second possible implementation manner;

fig. 10C is a schematic diagram of resource distribution of the first resource index set and the second resource index set in a third possible implementation manner;

fig. 10D is a schematic diagram of resource distribution of the first resource index set and the second resource index set in a fourth possible implementation manner;

fig. 11 is a schematic structural diagram of a first embodiment of a frequency domain resource mapping apparatus for PRS according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a second embodiment of a frequency domain resource mapping apparatus for PRS according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a third embodiment of a frequency domain resource mapping apparatus for PRS according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a fourth embodiment of a frequency domain resource mapping apparatus for PRS according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of an embodiment of a communication system according to the present application.

Detailed Description

In the following, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art:

AMF: the main functions of the access and mobility management function (AMF) include: connection management, mobility management, registration management, access authentication and authorization, reachability management, security context management, and other access and mobility related functions.

LMF: a Location Management Function (LMF) is a device or component deployed in a core network to provide a location function for a terminal device.

LMC: a Location Management Component (LMC) is a partial functional component of the LMF, which may be integrated on a base station (e.g., a 5G base station (gbnodeb, gNB)) of a second-system network on a next-generation radio access network (NG-RAN) side.

The frequency domain resource mapping method of the PRS provided by the following embodiments of the present application may be applied to a communication system. Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application. As shown in fig. 1, the communication system may include a terminal device 11 and a network device. Illustratively, in the communication system shown in fig. 1, the network device may include a radio access device located in radio access network 12 and a core network device located in core network 13.

For example, in the embodiment shown in fig. 1, the core network device in the core network 13 may be divided into components having an AMF function and an LMF function, the AMF may implement a gateway function, the LMF may implement a location center function, and the like, and the AMF and the LMF may communicate, for example, the AMF and the LMF may be connected through an NLs interface.

For example, the core network 13 may further include an enhanced serving mobile location center (E-SMLC) and/or a secure user plane location platform (SUPL) (secure user plane location) location platform (SLP) connected to the LMF, where the E-SMLC is an entity responsible for control plane location and is used for managing location of a target device by obtaining measurement and other location information, and the SLP is an SUPL entity responsible for user plane location.

Illustratively, the wireless access device may include one or more devices of a first-system network and devices of a second-system network. In the embodiment shown in fig. 1, the device of the first-system network may be a Next-generation LTE base station (Next-generation eNodeB, for example, an LTE base station accessing a 5G core network, and the ng-eNB may have a Transmission Point (TP) and a Reception Point (RP). The device of the second standard network may be a 5G base station (gbnodeb, gNB), that is, a 5G base station accessing a 5G core network. The gNB is a device which is deployed in a radio access network and meets the 5G standard and provides a wireless communication function for the terminal equipment.

Illustratively, the terminal device 11 may include one or more User Equipments (UEs). The radio access equipment may access the core network 13 via AMF, e.g. NG-eNB and gNB via AMF respectively via NG-C interface, and the terminal equipment 11 may access the radio access network 12 via radio access equipment, e.g. the terminal equipment 11 may access the radio access network 12 via NG-eNB via LTE air interface (LTE-Uu) and may access the radio access network 12 via gNB via NR air interface (NR-Uu).

Fig. 2 is a schematic structural diagram of another communication system according to an embodiment of the present application. As shown in fig. 2, the communication system differs from the communication system shown in fig. 1 in that the devices of the network of the second system include an LMC, which may assume a portion of the functionality of the LMF. Illustratively, referring to fig. 2, the gNB has TP, RP, and LMC therein. Therefore, in practical application, when the part of LMF functions is realized, the equipment of the second standard network does not need to access the core network through the AMF, thereby reducing the time delay of signaling and avoiding the terminal position from being exposed on the public network.

The components included in the communication system shown in fig. 2 are similar to those in the communication system shown in fig. 1, and for the non-detailed description of the embodiment shown in fig. 2, reference may be made to the description in the embodiment shown in fig. 1, and details are not repeated here.

Illustratively, as shown in fig. 1 and fig. 2, the terminal device 11 is connected to the wireless access device in a wireless manner, and the wireless access device is connected to the core network device in a wireless or wired manner. In one embodiment, the core network device and the wireless access device may be two separate and distinct physical devices. In another embodiment, the functions of the core network device and the logical functions of the wireless access device may be integrated on the same physical device. In yet another embodiment, only a part of the functions of the core network device and a part of the functions of the wireless access device may be integrated on one physical device.

Alternatively, the devices shown in fig. 1 and fig. 2 may include single or multiple devices of the second-standard network, and single or multiple terminal devices. Each device of the second-standard network may transmit data or control signaling to a single or multiple terminal devices. The multiple devices in the second-standard network may also transmit data or control signaling to each terminal device at the same time. The number of the core network devices, the wireless access devices and the terminal devices in the communication system is not limited in the embodiments of the present application, and may be set according to actual situations.

It is understood that the communication systems shown in fig. 1 and fig. 2 are only schematic diagrams, and in fact, other devices, such as a wireless relay device and a wireless backhaul device, or other network entities such as a network controller, a mobility management entity, etc., may also be included in the communication systems, and the embodiments of the present application are not limited thereto.

For example, the communication system applied in the embodiment of the present application may be a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a Long Term Evolution (LTE) system, a LTE Frequency Division Duplex (FDD) system, a LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), and other wireless communication systems applying Orthogonal Frequency Division Multiplexing (OFDM) technology. The system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

In this embodiment, the wireless access device in the network device may be configured to provide a wireless communication function for the terminal device, so that the terminal device accesses the communication system in a wireless manner. The wireless access device may include various forms of macro base stations, micro base stations (also referred to as small stations), relay stations, access points, and the like. The wireless access device may be a Base Transceiver Station (BTS) in CDMA, a base station (nodeB, NB) in WCDMA, an evolved node B (eNB or e-nodeB) in LTE, a corresponding device gNB in 5G network, a base station in a future communication system, or an access node in WiFi system, and the specific technology and the specific device form adopted by the wireless access device are not limited in the embodiments of the present application. For convenience of description, in all embodiments of the present application, the above-mentioned apparatus for providing a wireless communication function for a terminal device is collectively referred to as a wireless access device.

For example, in embodiments of the present application, the terminal device may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem with wireless communication capabilities. Alternatively, the terminal device may also be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), a terminal (terminal), and the like, and the terminal device may communicate with one or more core network devices via a Radio Access Network (RAN), for example, the terminal device may be a mobile phone (or a cellular phone), a computer with a mobile terminal, and the like, for example, the terminal device may also be a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, and the mobile device exchanges language and/or data with the RAN. Specifically, the terminal device may also be a mobile phone (mobile phone), a subscriber unit (subscriber unit), a smart phone (smart phone), a wireless data card, a Personal Digital Assistant (PDA) computer, a tablet computer, a wireless modem (modem), a handheld device (handset), a laptop computer (laptop computer), a Machine Type Communication (MTC) terminal, and the like. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the terminal device.

Optionally, the network device and the terminal device may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; can also be deployed on the water surface; it may also be deployed on airborne airplanes, balloons and satellite vehicles. The embodiment of the application does not limit the application scenarios of the network device and the terminal device.

First, a brief description is given of an application scenario of the embodiment of the present application.

Specifically, first, a mapping rule of the LTE cell for the baseband DC signal and a mapping rule of the NR cell for the baseband DC signal are introduced.

In a system of a first standard network, for example, in an LTE system, a mapping rule of a downlink signal in a frequency domain is that the downlink signal cannot be mapped to a subcarrier corresponding to a Direct Current (DC) component of a baseband, that is, the subcarrier corresponding to the DC component is skipped in a process of mapping the downlink signal from a time domain to the frequency domain.

Optionally, in the LTE system, a formula for converting the downlink signal in the time-frequency domain is shown in formula (1), and a resource map of the downlink signal in the frequency domain is shown in fig. 3. Fig. 3 is an exemplary resource map of a modulated downlink signal in the LTE system in the frequency domain.

Wherein the content of the first and second substances,

which is representative of the downstream signal, is,

indicating that the index on port p is (k)^(-)L) modulation symbols corresponding to REs, wherein

Indicating that the index on port p is (k)⁽⁺⁾L) modulation symbols corresponding to REs, wherein

For the number of RBs of the downlink carrier,

number of REs of one RB, N_CP,TsDenotes the Cyclic Prefix (CP) length, N, of the symbol l_CP,lCP Length for symbol l corresponds to T_sThe number of the components is equal to or less than the total number of the components,

for the basic time unit defined by LTE, k is an intermediate variable representing the subcarrier number of OFDM modulation, l is the OFDM symbol index, and p is the port number.

In this embodiment, the subcarrier corresponding to the DC component is a direct current component viewed from a baseband signal, and after performing up-conversion, the subcarrier corresponding to the DC component is directly shifted to a frequency point of a downlink cell. Alternatively, one subcarrier in frequency and one symbol in time domain (symbol) are referred to as one Resource Element (RE). Thus, as shown in fig. 3, in the time-frequency domain resource map, the subcarrier corresponding to the DC component is referred to as an RE occupied by the DC component.

Optionally, fig. 4 is a schematic diagram of an up-conversion process of a downlink signal of an LTE cell. As shown in fig. 4, in the present embodiment,

the used results are superposed and then are filtered by a filter to obtain modulation data.

Since the input of the frequency converter acts on both the input signal and the local oscillator signal during the up-conversion (up-conversion), the mixing signal cos (2 pi f) may be mixed from the mixer during the up-conversion of the downstream signal₀t) and sin (2 π f)₀t) causing a large interference to the downlink signal, resulting in the downlink signal not being suitable for modulating data. Thus, in the LTE system, the subcarrier corresponding to the DC component in the downlink signal is not used for modulating data.

In practical application, because the design of the first standard network, for example, the LTE system, is relatively simple, the network device and the terminal device will work at the same transceiving frequency point, and simply reserving the subcarrier corresponding to the DC component will not cause any problem.

With the development of network technology, NR systems have appeared, and since NR systems have been designed in the early stage to take into account the requirements of large bandwidth, multi-subcarrier spacing, in-band Carrier Aggregation (CA), etc., the subcarriers corresponding to the DC component are also used to modulate data.

Optionally, in the NR system, a formula of time-frequency domain conversion of the downlink signal is shown in formula (2), and a resource map of the downlink signal in the frequency domain is shown in fig. 5. For example, fig. 5 is a resource map of a modulated downlink signal in an NR system in a frequency domain, and REs occupied by a DC component may also modulate data.

Wherein the content of the first and second substances,

in the above-mentioned formula,

which is representative of the downstream signal, is,

indicating that parameter set mu indexes (k, l) on port p for the modulation symbol corresponding to RE,

the resource grid representing the parameter set mu contains the number of RBs,

indicates the number of REs of one RB,

resource grid center representing parameter set mu and some fixed parameter set mu₀The number of REs that differ by the center of the resource grid,

t corresponding to the length of the ith OFDM under the parameter set mu_cThe number of the components is equal to or less than the total number of the components,

is NRThe basic unit of time is defined as the unit of time,

denotes the CP start time of the l-th symbol under the parameter set mu,

means uplink x ═ UL or downlink x ═ DL parameter set μ₀The resource grid starts CRB index, k is an intermediate variable and represents the subcarrier serial number of OFDM modulation, l is OFDM symbol index, and p is port number.

In the NR system, the subcarrier corresponding to the DC component may also modulate data in order to weaken the concept of the carrier from the perspective of resource mapping, thereby achieving flexible bandwidth configuration between the terminal device and the network device. For example: when one cell with large bandwidth serves one terminal device with small bandwidth, the terminal device can work at any frequency domain position of a cell carrier, and when a plurality of cells with continuous frequency spectrum carry out carrier aggregation to serve one terminal device with large bandwidth, the terminal device can adopt a set of radio frequency to receive a plurality of cells. In any case, the terminal device does not need to consider the position at which the DC of one or more carriers needs to be skipped when mapping the resources.

Optionally, in the spectrum defined by NR, a part of the spectrum is actually LTE spectrum. Thus, an operator can deploy the NR cell on the spectrum of the existing LTE, and gradually replace the LTE cell, thereby upgrading the network. LTE and NR cells of the same operator may co-exist on the same segment of spectrum for a longer period of time.

For example, in a scenario based on observed time difference of arrival (OTDOA) positioning technology, especially combining NR and LTE co-channel deployment, a serving cell and a neighboring cell may be an NR cell and an LTE cell, respectively, where the NR cell may transmit a positioning reference signal of NR, and the LTE cell may transmit a PRS of LTE, and when a subcarrier interval of the NR is the same as a subcarrier interval of the PRS of LTE (i.e., 15kHz at the same time), interference between the NR cell and the LTE cell may be avoided by means of frequency division multiplexing, as shown in fig. 6. Fig. 6 is a schematic resource distribution diagram of LTE positioning reference signals and NR positioning reference signals frequency division multiplexing.

Exemplarily, fig. 7 is a schematic diagram of resource mapping of positioning reference signals of PRS and NR of LTE on a time-frequency domain. Each Resource Block (RB) includes 12 REs consecutive in the frequency domain, as shown in fig. 7, the 12 REs are respectively denoted as #0RE to #11RE, the resource block RB is referred to as a slot (slot) in the time domain, and one subcarrier in frequency and one symbol (symbol) in the time domain are referred to as one RE.

As shown in fig. 7, it is assumed that prs of LTE (LTE prs) occupies #0 and #6 REs of each resource block RB in LTE when data is modulated. Consider an NR system deployed co-frequency with LTE, with subcarrier spacing the same as LTE, e.g., 15 kHz. The relationship of REs occupied by LTE PRS on the carriers corresponding to NRs is as follows:

in terms of frequency domain dimension, for RBs with frequencies smaller than the corresponding frequency of the LTE DC subcarrier, the LTE PRS occupies #0RE and #6RE of the RB; for RBs with frequencies greater than the corresponding frequency of the LTE DC sub-carrier, the LTE PRS occupies #1RE and #7RE of the RB. Thus, in order to ensure that the positioning reference signals of different cells do not collide, the NR cell cannot transmit the positioning reference signals of NR on #0RE, #1RE, #6RE, #7RE of each RB, which can transmit the positioning reference signals only on 8 resources such as #2RE- #5RE and #8RE- #11RE of each RB.

In case the NR cells also use the same way as the LTE cells, 2 REs per RB are used for transmitting the positioning reference signal, so that only 4 NR cells can be additionally supported on one resource block for frequency division multiplexing with the LTE cells.

For example, if there are three LTE cells in the system, each LTE cell occupies #0RE and #6RE, #2RE and #8RE, and #4RE and #10RE of each RB in LTE, that is, the LTE cell occupies #0RE and #6RE of each RB in LTE, and its LTE PRS occupies #0RE, #1RE, #6RE, and #7RE of each RB on a carrier corresponding to NR; the LTE PRS of the LTE cell occupies the #2RE, #3RE, #8RE, #9RE of each RB on the carrier wave corresponding to the NR; and the LTE PRSs of the LTE cells occupy #4RE and #10 of each RB in the LTE respectively occupy #4RE, #5RE, #10RE and #11RE of each RB on the carrier wave corresponding to the NR. That is, the LTE PRS of the three LTE cells occupy all REs of each RB on the carrier corresponding to the NR, and cannot support frequency division multiplexing of the NR cell with the three LTE cells. Under a pure LTE cell or a pure NR cell, each pure LTE cell or pure NR cell only occupies 2 REs of each RB and can support frequency division multiplexing of 6 cells, so that different mapping rules of LTE and NR for DC components may cause a reduction in the number of frequency division multiplexing cells when LTE and NR co-frequency bands are deployed to transmit positioning reference signals.

In summary, in a scenario where an NR cell and an LTE cell are deployed in the same frequency band, a serving cell and a neighboring cell of a terminal device may be from the NR cell and the LTE cell, respectively, and when both the NR cell and the LTE cell need to send a Positioning Reference Signal (PRS) to the terminal device, the NR cell and the LTE cell may send the NR PRS and the LTE PRS respectively in a frequency division multiplexing manner, so that when the terminal device receives NR PRS configuration information and LTE PRS configuration information sent by a positioning center, the terminal device does not need to consider an influence of the LTE PRS when determining frequency domain resource mapping of the NR PRS. Therefore, the terminal device can obtain the positioning measurement result after receiving the NR PRS and the LTE PRS transmitted by the NR cell and the LTE cell, and transmit the positioning measurement result to the positioning center, so that the positioning center can position the terminal device.

However, when mapping frequency domain resources, the mapping rule of the LTE cell for the baseband DC signal is different from the mapping rule of the NR cell for the baseband DC signal, so that the number of cells that can be frequency division multiplexed when the NR cell and the LTE cell are deployed in the same frequency band is reduced compared to when a pure LTE cell or a pure NR cell is deployed alone, and there is a problem of resource waste.

In order to solve the above problem, the present application provides a frequency domain resource mapping method for PRS. The terminal equipment receives auxiliary information sent by the network equipment, wherein the auxiliary information comprises: the PRS configuration information corresponding to the PRS and the information of the first frequency point are used for indicating the offset information of the PRS on the frequency domain resource, the first frequency point is a downlink frequency point of a cell of a first standard network, and the terminal equipment determines a resource mapping position on the frequency domain when the PRS is received and sent according to the auxiliary information and receives the PRS sent by the second standard network equipment on the resource mapping position. In the technical scheme, the terminal equipment can determine the resource mapping position after the positioning reference signal is offset based on the indication of the auxiliary information, and the problem that the number of frequency division multiplexing cells is reduced when PRS is transmitted by deployment of common frequency bands of cells of networks of different systems can be solved.

The technical solution of the present application will be described in detail below with reference to specific examples. It should be noted that the following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

Fig. 8 is an interaction diagram of a first embodiment of a frequency domain resource mapping method for PRS according to an embodiment of the present application. The method is explained by information interaction between the terminal equipment and the network equipment. In this embodiment, the network device refers to a radio access device or a core network device in the communication system shown in fig. 1 and fig. 2. Illustratively, the network device may include: the system comprises network equipment of a second standard and a location management function LMF. Referring to fig. 8, in the present embodiment, the method may include the steps of:

step 81: the network equipment acquires the information of the first frequency point and PRS configuration information corresponding to the PRS.

The first frequency point is a downlink frequency point of a cell of a first standard network.

Optionally, in a scenario where cells of networks of different systems are deployed in the same frequency band, if positioning of a terminal device in the frequency band is to be implemented, the cell of each system network sends a positioning reference signal PRS to the terminal device.

For example, in this embodiment, a cell in which the terminal device is located in a first-system network and a cell in a second-system network are explained, where the system of the first-system network is different from the system of the second-system network, the cell in the first-system network does not map resources on baseband subcarriers, and the cell in the second-system network may map resources on baseband subcarriers.

For example, the system corresponding to the first standard network may be any one of multiple systems such as an LTE system, a CDMA system, and a WCDMA system, and the system corresponding to the second standard network may be a New Radio (NR) system. It should be noted that, the embodiments of the present application do not limit the specific expression forms of the first standard network and the second standard network, and all the characteristics that the cell of the first standard network does not map resources on the baseband subcarriers and the cell of the second standard network can map resources on the baseband subcarriers belong to the protection scope of the embodiments of the present application.

In the embodiment of the present application, to avoid the problem of reduction in the number of cells that can be frequency division multiplexed when cells of networks of different systems are deployed in the same frequency band, before the network device sends the PRS to the terminal device, it may first be necessary to determine PRS configuration information corresponding to the PRS and auxiliary information such as information of a downlink frequency point of a cell of a network of a first system, so that the network device may determine, according to the auxiliary information, a frequency resource location on a frequency domain when the PRS is received and transmitted on one hand, and may send the auxiliary information to the terminal device on the other hand, so that the terminal device also determines the frequency resource location on the frequency domain when the PRS is received and transmitted on the other hand, thereby reasonably utilizing resources on the frequency domain and reducing resource waste.

Optionally, the network device may include a second-standard network device and a location management function LMF, so both the second-standard network device and the LMF may obtain PRS configuration information and information of the first frequency point.

For example, in this embodiment, if the execution subject of this embodiment is a network device of a second standard, but PRS configuration information corresponding to a PRS and information of a first frequency point are configured by an LMF, the step 81 may be implemented by following possible designs:

In this embodiment, when the LMF completes configuration of PRS configuration information corresponding to a PRS and information of a first frequency point, the second-standard network device may obtain the PRS configuration information and the information of the first frequency point by obtaining the PRS configuration information configured by the LMF and the information of the first frequency point. The specific obtaining mode may be that the obtaining request is sent to the LMF to request the LMF to send, or the PRS configuration information and the information of the first frequency point automatically synchronized by the LMF are received.

For example, in this embodiment, if the execution subject of this embodiment is an LMF and PRS configuration information corresponding to a PRS and information of a first frequency point are configured by the LMF, the LMF may further send the PRS configuration information and the information of the first frequency point to a second standard network device after completing configuration work on the PRS configuration information and the information of the first frequency point. Therefore, the second standard network device can execute the scheme of frequency domain resource mapping of the PRS through interaction with the terminal device based on the received PRS configuration information and the information of the first frequency point.

For example, in this embodiment, if the execution subject of this embodiment is an LMF, but PRS configuration information corresponding to a PRS and information of a first frequency point are configured by a network device of a second standard, the step 81 may be implemented by following possible designs:

and the LMF acquires the PRS configuration information configured by the network equipment of the second standard and the information of the first frequency point.

In this embodiment, when the second-standard network device completes configuration work of PRS configuration information corresponding to a PRS and information of a first frequency point, the LMF may obtain the PRS configuration information and the information of the first frequency point by acquiring the PRS configuration information configured by the second-standard network device and the information of the first frequency point. The specific obtaining mode may be that the PRS configuration information and the information of the first frequency point automatically synchronized by the network device of the second system are received by sending an obtaining request to the network device of the second system to request the network device of the second system to send the obtaining request, or receiving the PRS configuration information and the information of the first frequency point automatically synchronized by the network device of the second system.

For example, if the LMF is used to configure information of the first frequency point, the LMF is determined by the following method:

in this embodiment, in a communication system where a terminal device is located, if a subcarrier interval of a PRS transmitted by a second standard network device for positioning is the same as a subcarrier interval of a PRS transmitted by a first standard network device for positioning, and a PRS transmitted by the first standard network device exists in a bandwidth where the PRS transmitted by the second standard network device is located, a downlink frequency point of a cell where the first standard network device is located is used as a first frequency point, and information of the first frequency point may be configured to the second standard network device for positioning.

For example, if the network device of the second standard for positioning is used to configure information of the first frequency point, the network device of the second standard is determined by the following method:

one way is as follows: in this embodiment, the second standard network device may obtain the first frequency point of the cell of the first standard network through the LMF configuration signaling;

the other mode is as follows: and the second-system network equipment determines to send a positioning reference signal in a preset mode and determines to determine the downlink frequency point of the cell of the first-system network as the first frequency point when the positioning reference signal meets the following condition, wherein the condition is that the subcarrier interval of the PRS sent by the second-system network equipment for positioning is the same as the subcarrier interval of the PRS sent by the first-system network equipment for positioning, and the PRS sent by the first-system network equipment exists in the bandwidth where the PRS sent by the second-system network equipment is located.

It should be noted that, if the system corresponding to the first-standard network is an LTE system, and the system corresponding to the second-standard network is an NG system, the subcarrier interval of the PRS is 15 kHz. The cell of the first standard network comprises an LTE base station (eNB) and a next generation LTE base station (ng-eNB), and the signaling of the LMF configuration 5G base station (gNB) is NR positioning protocol annex (NRPPa) signaling.

For example, in this embodiment, the embodiment of the information about the first frequency point may be implemented as follows:

as an example, the information of the first frequency point is an absolute radio channel number (ARFCN) of a network cell of the second system corresponding to the frequency of the first frequency point.

Because the ARFCN can be used to identify the number of the special radio frequency channel, the ability of the terminal device to identify the first frequency point can be improved by using the ARFCN of the second-standard network cell corresponding to the frequency of the first frequency point as the information of the first frequency point. Therefore, a plurality of second standard network cells can share the frequency of one first frequency point, and signaling cost is saved.

As another example, the information of the first frequency point is applicable to a plurality of cells for positioning, or the information of the first frequency point is applicable to one cell for positioning.

In a first possible implementation manner of this embodiment, when the information of the first frequency point is applicable to a cell for positioning, the information of the first frequency point is represented in any one of the following forms:

the information of the first frequency point is a Common Resource Block (CRB) index corresponding to the frequency of the first frequency point and an RE index in a CRB corresponding to the CRB index, and the CRB is located on a downlink carrier of a cell for positioning;

or

The information of the first frequency point is a CRB index corresponding to the frequency of the first frequency point, and the CRB corresponding to the CRB index is located on a downlink carrier of a cell for positioning, where an RE index in the CRB is a preset value, and the preset value is a preset fixed value or a value determined based on the information of the cell for positioning;

optionally, for a value determined based on the information of the cell for positioning, for example, an RE index within a CRB where a DC of a downlink carrier of the gNB for positioning is located.

Or

The information of the first frequency point is a resource index of the frequency of the first frequency point relative to a second frequency point, and the second frequency point is a point A of a cell for positioning.

The cell a Point (i.e., Point a) is a concept introduced by the network of the second system, and may be used as a common reference Point (e.g., RE0 of CRB 0) for all subcarrier intervals in the cell.

In a second possible implementation manner of this embodiment, if the information of the first frequency point is applicable to a plurality of cells for positioning, and one of the cells for positioning is a main serving cell, the information of the first frequency point is represented in any one of the following forms:

or

The first frequency point information is a CRB index corresponding to the frequency of the first frequency point, and the CRB corresponding to the CRB index is located on a downlink carrier of a main serving cell, where an RE index in the CRB is a preset value, and the preset value is a preset fixed value or a value determined based on the information of the main serving cell;

or

This possible implementation differs from the above implementation in that the information of the first frequency point may be applicable to a plurality of cells for positioning, and the plurality of cells for positioning determine a primary serving cell, and the information of the first frequency point is related to the information of the primary serving cell.

For a detailed description of this mode, reference may be made to the description of the above mode, and details are not repeated here.

In a third possible implementation manner of this embodiment, if the information of the first frequency point is applicable to a plurality of cells for positioning, and the plurality of cells for positioning include a serving cell of the network device, the information of the first frequency point is represented in any one of the following forms:

or

The possible implementation manner is different from the above implementation manner in that the information of the first frequency point may be applicable to a plurality of cells for positioning, and the plurality of cells for positioning include a serving cell of the network device, and the information of the first frequency point is related to the information of the serving cell.

It should be noted that, in this embodiment, if the execution main body of this step is the network device of the second standard, the information of the first frequency point may be implemented by any one of the first to third possible implementation manners, and if the execution main body of this step is the LMF, the information of the first frequency point may be implemented by the first or third possible implementation manners.

Step 82: the network equipment sends auxiliary information to the terminal equipment, wherein the auxiliary information comprises: PRS configuration information and information of a first frequency point, wherein the auxiliary information is used for indicating offset information of the PRS on frequency domain resources.

Optionally, in this embodiment, the network device may send PRS configuration information and information of the first frequency point to the terminal device in the form of auxiliary information. Specifically, the form of sending PRS configuration information and information of a first frequency point by a network device may be implemented by one of the following examples:

as an example, the network device may send the auxiliary information containing the information of the first frequency point and the PRS configuration information in parallel to the terminal device, so that the terminal device may obtain the information of the first frequency point and the PRS configuration information at the same time by analyzing the received auxiliary information.

In this embodiment, the network device sends the information of the first frequency point to the terminal device in an explicit configuration manner, so that the terminal device can obtain the information of the first frequency point and the PRS configuration information by analyzing the received auxiliary information, thereby reducing the processing time of the terminal device and improving the frequency domain resource mapping efficiency.

As another example, the network device may first include the information of the first frequency point in the PRS configuration information, then include the PRS configuration information in the auxiliary information, and finally send the auxiliary information to the terminal device, so that the terminal device may only obtain the PRS configuration information by analyzing the received auxiliary information, and then may obtain the information of the first frequency point according to the PRS configuration information.

It should be understood that the auxiliary information is only a name, and may be other information names, and the application is not limited thereto. This embodiment only illustrates that the PRS configuration information and the information of the first frequency point are information that needs to be sent to the terminal device through the network device. Even the information of the first frequency point may be included in the PRS configuration information, and the specific information format or data structure is not limited in the present application. And will not be described in detail below.

Optionally, when the subcarrier interval corresponding to the positioning reference signal of the cell of the second-standard network is the same as the subcarrier interval corresponding to the cell of the first-standard network, and there is one auxiliary information reference cell or one or more auxiliary information neighboring cells in the cell of the second-standard network as the cell of the first-standard network, and the frequency point of the cell of the first-standard network is included in the bandwidth of the positioning reference signal of the second-standard network, and if there are multiple cells of the first-standard network, the frequency points of the cells are completely the same, so that the terminal device can determine that the first frequency point is the frequency point of the cell of the first-standard network.

Optionally, for a cell of the first network type serving as the auxiliary information reference cell, the first frequency point is one of earfcnRef and earfcnRef-v9a0, and when earfcnRef and earfcnRef-v9a0 are not configured, the first frequency point is a central frequency point of the main serving cell. Wherein earfcnRef is evolved-universal terrestrial radio access absolute radio frequency channel number reference (evolved-universal radio access absolute channel number reference), and earfcnRef-v9a0 is earfcnRef of v9a 0.

For a cell of a first network standard, which is an auxiliary information neighboring cell, the first frequency point is one of earfcn and earfcn-v9a0, and when earfcn and earfcn-v9a0 are not configured, the first frequency point is a central frequency point of an auxiliary information reference cell. Wherein EARFCN is evolved-universal terrestrial radio access absolute radio frequency channel number (EARFCN), EARFCN-v9a0 is EARFCN of v9a 0.

In the implicit configuration mode, the information of the first frequency point is included in the PRS configuration information, which means that the information of the first frequency point is determined by the PRS configuration information. For example, through the configuration information of LTE PRS, the information of the first frequency point may be determined.

Illustratively, in a possible design of this embodiment, the auxiliary information further includes: frequency offset of PRS.

Optionally, in this embodiment, the auxiliary information may further include a frequency offset of the PRS, where the frequency offset of the PRS may be used to indicate the number of subcarriers that need to be shifted on the right side of the first frequency point when the PRS is mapped onto the frequency domain.

In this embodiment, the network device may send the PRS frequency offset, the first frequency point information, and the PRS configuration information to the terminal device in parallel, may also send the PRS frequency offset to the terminal device in a form of including the PRS frequency offset in the first frequency point information or including the PRS configuration information, and may also send the PRS frequency offset to the terminal device in a form of including the PRS frequency offset in the first frequency point information and including the first frequency point information in the PRS configuration information. The embodiment of the present application does not limit the form of the frequency offset sent by the network device, and can be determined according to the situation.

It should be noted that, in a normal case, the network device does not send the frequency offset to the terminal device, and when the network device does not send the frequency offset, the terminal device directly shifts the REs corresponding to the number of subcarriers occupied by the first frequency point on the frequency domain resource according to the number of subcarriers occupied by the first frequency point. Generally, the first frequency point occupies 1 subcarrier (one RE in time-frequency domain) on the frequency domain resource, when the PRS is mapped onto the frequency domain, for frequencies lower than the subcarrier corresponding to the first frequency point, the number of the RE occupied by the PRS in each RB is unchanged, for frequencies higher than the subcarrier corresponding to the first frequency point, the number of the RE occupied by the PRS in each RB is increased by 1, or for frequencies lower than the subcarrier corresponding to the first frequency point, the number of the RE occupied by the PRS in each RB is decreased by 1, and for frequencies higher than the subcarrier corresponding to the first frequency point, the number of the RE occupied by the PRS in each RB is unchanged. The frequency offset may also be protocol predefined when the network device does not send the frequency offset to the terminal device.

Optionally, in this embodiment, if the main execution body of the step is an LMF, the LMF may send the auxiliary information to the terminal device through an LTE Positioning Protocol (LPP) signaling.

In this embodiment, when the main body of the step is the LMF, the method may be implemented by using the communication system shown in fig. 2.

Optionally, in this embodiment, if the main execution body of the step is a second-system network device, the second-system network device may send the auxiliary information to the terminal device through Radio Resource Control (RRC) protocol signaling.

In this embodiment, when the main execution body of this step is a network device of the second standard, this method may be implemented by using the communication system shown in fig. 1.

It should be understood that the information of the first frequency point may be one or more. For the explicit and/or implicit configuration method, the information of the plurality of first frequency points may be indicated. For example, when the frequency of the NR includes multiple LTE cell frequencies, or includes multiple networks of different first standards, information of multiple first frequency points may be configured.

Step 83: and the terminal equipment determines the resource mapping position on the frequency domain when the PRS is transmitted and received according to the received auxiliary information.

Optionally, in this embodiment, the terminal device receives the auxiliary information sent by the network device. For example, the terminal device may receive the auxiliary information sent by the LMF through LPP signaling, or receive the auxiliary information sent by the network device in the second system through RRC protocol signaling.

For example, after receiving the auxiliary information, the terminal device may obtain PRS configuration information, information of the first frequency point, and a frequency offset (optional) of the PRS by analyzing the auxiliary information, and then determine a resource mapping position on a frequency domain when the PRS is received and transmitted based on the obtained PRS configuration information, the information of the first frequency point, and the frequency offset (optional) of the PRS.

Optionally, after receiving the auxiliary information, the terminal device may send a first response message to the network device, where the first response message is used to indicate that the terminal device receives the auxiliary information sent by the network device.

Accordingly, the network device receives the first response message sent by the terminal device, thereby determining the auxiliary information received by the terminal device.

For a specific implementation principle and beneficial effects of this step 83, reference may be made to the following description in the embodiment shown in fig. 9, which is not described herein again.

Step 84: and the terminal equipment receives the PRS sent by the network equipment of the second standard at the resource mapping position.

In this embodiment, when the network device of the second standard determines that the PRS configuration information, the information of the first frequency point, and the (optional) auxiliary information of the frequency offset of the PRS are included, a resource mapping position on a frequency domain during PRS transmission and reception may be determined based on the auxiliary information, and then the PRS may be sent to the terminal device at the resource mapping position.

Accordingly, as shown in step 83, after receiving the auxiliary information, the terminal device determines the resource mapping position on the frequency domain when receiving and transmitting the PRS based on the auxiliary information. Therefore, the terminal device can receive the PRS sent by the network device of the second standard by detecting at the resource mapping position.

Optionally, in this embodiment, after receiving the PRS sent by the network device of the second system, the terminal device may also send a second response message to the network device of the second system, where the second response message may be used to indicate that the terminal device receives the auxiliary information sent by the network device of the second system.

Correspondingly, the second-standard network device receives the second response message sent by the terminal device, and then determines that the terminal device receives the PRS sent by the terminal device according to the second response message.

For example, the specific implementation principle and the beneficial effect of step 84 may be described based on the following description in the embodiment shown in fig. 9, and will not be described herein again.

In the frequency domain resource mapping method for PRS provided in the embodiment of the present application, a network device obtains information of a first frequency point and PRS configuration information corresponding to the PRS, where the first frequency point is a downlink frequency point of a cell of a first standard network, and sends auxiliary information to a terminal device, where the auxiliary information includes: the terminal device may determine, based on the received auxiliary information, a resource mapping position on the frequency domain when the PRS is received and transmitted, and then receive, at the resource mapping position, the PRS sent by the network device of the second system. In the technical scheme, the terminal equipment can accurately determine the resource mapping position after the positioning reference signal is offset based on the received auxiliary information, so that the problem of reducing the number of frequency division multiplexing cells when the PRS is deployed and sent by the cell co-frequency bands of networks of different systems is solved, and resource waste is avoided.

Exemplarily, on the basis of the above embodiments, fig. 9 is a flowchart illustrating a second embodiment of a frequency domain resource mapping method for PRS provided in the embodiment of the present application. In practical application, the terminal device and the network device may respectively execute the technical solutions of the methods. For example, since the present embodiment is further described in the above step 83, the present embodiment is explained by taking a terminal device as an execution subject. Referring to fig. 9, the step 83 may be implemented by:

step 91: and determining a target resource index corresponding to the first frequency point according to the information of the first frequency point in the auxiliary information, wherein the target resource index is used for indicating the mapping resource position of the first frequency point on the frequency domain.

Optionally, in this embodiment, after receiving the auxiliary information, the terminal device first parses information of the first frequency point, configuration information of the PRS, and a frequency offset of the PRS from the auxiliary information (which is optional).

For example, the terminal device and the network device of the second standard for positioning may determine the target resource index corresponding to the first frequency point according to the obtained information of the first frequency point

Specifically, the terminal device and the second standard network device for positioning may both determine the target resource index corresponding to the first frequency point based on the frequency of the second frequency point, that is, the mapping resource position of the first frequency point on the frequency domain. And the second frequency point is the point A of the cell where the second standard network equipment is located.

Specifically, the target resource index corresponding to the first frequency point

Can be expressed by the following formula:

the frequency of the first frequency point can be directly obtained according to the first frequency point, and the frequency of the second frequency point is the frequency of the point a of the downlink carrier of the cell for positioning. For a certain cell of the second-standard network, the frequency of the point a is determined.

Exemplarily, if the PRS subcarrier interval of the cell for positioning is 15kHz and the first frequency point is included in the PRS bandwidth of the cell for positioning, the terminal device may bring the determined frequency of the first frequency point, the determined frequency of the second frequency point, and the determined frequency of 15kHz into the above formula to obtain the target resource index corresponding to the first frequency point.

And step 92: and determining a first resource index set corresponding to the PRS according to the PRS configuration information in the auxiliary information.

Wherein the first set of resource indices comprises: CRB indices occupied by the PRS and resource RE indices within each CRB.

Optionally, in this embodiment, the terminal device and the network device of the second standard for positioning may determine, based on the determined PRS configuration information, a first resource index set Q corresponding to the PRS₁。

Specifically, the terminal device and the network device of the second system for positioning first determine, based on the PRS configuration information, that a set of CRB indexes occupied by PRS of the network device of the second system is a set of CRB indexes occupied by PRS of the network device of the second system

The

Indicating that the PRS occupy a total of N CRBs,

indicating PRS in PRS band of cell for positioningThe ith CRB occupied within the width; secondly, determining the RE index set in each CRB occupied by the PRS as the RE index set based on the PRS configuration information

The

Indicating that a total of K REs are occupied within each CRB,

indicating the i-th RE occupied by the PRS within each CRB. Finally, according to the CRB index set a and the RE index set B in each CRB, a first resource index set Q corresponding to the PRS may be obtained₁I.e. the first set of resource indices Q₁Can be expressed by the following formula:

step 93: and determining a second resource index set after the PRS is shifted on the frequency domain resource according to the target resource index and the first resource index set.

Wherein the second resource index set is used for indicating a resource mapping position on a frequency domain when the PRS is transmitted and received.

Optionally, in this embodiment, when the auxiliary information further includes a frequency offset of a PRS, the terminal device further needs to acquire the frequency offset of the PRS from the auxiliary information. Or, when the auxiliary information does not include the frequency offset of the PRS, the terminal device may determine the frequency offset of the PRS according to the number of occupied subcarriers in the frequency domain of the first frequency point.

Accordingly, in this embodiment, the terminal device and the network device of the second standard for positioning may be based on the determined first resource index set Q₁And the frequency offset of the PRS determines a second resource index set Q according to any one of the following modes₂。

Illustratively, the second set of resource indicesQ₂This can be achieved in any of four possible implementations.

Wherein, the first possible implementation manner is as follows:

a second possible implementation is as follows:

a third possible implementation is as follows:

a fourth possible implementation is as follows:

wherein Q is₂Representing a second set of resource indices, Q₁Represents a first set of resource indices, k represents the Q₂Resource index of (1), k₁Is Q₁The index of the resource(s) in (2),

for the purpose of the target resource index,

is the number of REs in one resource block RB,

and

representing the set of CRB indices occupied by PRS, n is the frequency offset of PRS.

Fig. 10A is a schematic diagram of resource distribution of a first resource index set and a second resource index set according to a first possible implementation manner. Fig. 10B is a schematic diagram of resource distribution of the first resource index set and the second resource index set according to a second possible implementation manner. Fig. 10C is a schematic diagram of resource distribution of the first resource index set and the second resource index set in a third possible implementation manner. Fig. 10D is a schematic diagram of resource distribution of the first resource index set and the second resource index set in a fourth possible implementation manner. In general, the frequency offset of the PRS is 1, that is, the frequency offset of the PRS is 1 in each of fig. 10A to 10D.

Referring to fig. 10A, a network device and a terminal device of a second standard for positioning may determine, in a first possible implementation manner, a resource mapping location when a PRS is received and transmitted over an entire frequency domain. At this time, for Q₂The resource index smaller than the target resource index, the second-system network device may send the PRS on the first resource index set corresponding to the PRS, and correspondingly, the terminal device may also receive the PRS sent by the second-system network device on the first resource index set corresponding to the PRS; for Q₂The second-system network device needs to transmit the PRS on the resource shifted to the right by the frequency offset (n) of the PRS on the basis of the first resource index set corresponding to the PRS, and correspondingly, the terminal device also needs to receive the PRS transmitted by the second-system network device on the resource shifted to the right by the frequency offset (n) of the PRS on the basis of the first resource index set corresponding to the PRS.

Reference toFig. 10B shows that the network device and the terminal device of the second standard for positioning may determine the resource mapping positions when the PRS is transmitted and received in the entire frequency domain according to the second possible implementation manner. At this time, for Q₂The resource index of the second standard network device is smaller than or equal to the resource index of the target resource index, the second standard network device needs to transmit the PRS on the resource which is shifted to the left by the frequency offset (n) of the PRS on the basis of the first resource index set corresponding to the PRS, and correspondingly, the terminal device also needs to receive the PRS transmitted by the second standard network device on the resource which is shifted to the left by the frequency offset (n) of the PRS on the basis of the first resource index set corresponding to the PRS; for Q₂The second-system network device may send PRS on the first resource index set corresponding to the PRS, and correspondingly, the terminal device may also receive the PRS sent by the second-system network device on the first resource index set corresponding to the PRS.

Referring to fig. 10C, the network device and the terminal device of the second standard for positioning may determine, in the entire frequency domain, resource mapping positions when the PRS is received and transmitted according to a third possible implementation manner. This approach differs from the possible implementation shown in fig. 10A in that it adds overflow protection, i.e. determines a first set of resource indices Q₁Maximum CRB index of medium PRS occupied bandwidth

Maximum resource index k in_maxThereby ensuring that the PRS only falls on the CRB given by the PRS configuration information.

Referring to fig. 10D, the network device and the terminal device of the second standard for positioning may determine, in the entire frequency domain, a resource mapping position when the PRS is received and transmitted according to a fourth possible implementation manner. This approach differs from the possible implementation shown in fig. 10B in that it adds underflow protection, i.e. determining the first set of resource indices Q₁Minimum CRB index of medium PRS occupied bandwidth

Has a minimum resource index of k_minThereby to makeAnd ensuring that the PRS only falls on the CRB given by the PRS configuration information.

As can be seen from the above analysis, in this embodiment, the network device of the second standard for positioning may use the second resource index set Q₂And sending PRS to the terminal equipment at the corresponding resource mapping position. Wherein the PRS has shifted Q on frequency domain resources₂Each element k in the second system is an RE index corresponding to the second frequency point, and the second system network device may obtain a CRB index n where the RE index is located according to the RE index by the following formula^CRBAnd RE index k within CRB^CRB：

Correspondingly, the terminal device may index the second set of resource indexes Q₂Receiving PRS sent by terminal equipment at corresponding resource mapping position, wherein the terminal equipment can also offset Q on frequency domain resource according to the PRS₂Each element k in the index table determines the CRB index n of the RE index corresponding to the element^CRBAnd RE index k within CRB^CRB。

According to the frequency domain resource mapping method of the PRS provided by the embodiment of the application, according to the information of the first frequency point in the auxiliary information, a target resource index corresponding to the first frequency point is determined, where the target resource index is used to indicate the mapping resource position of the first frequency point on the frequency domain, and according to the PRS configuration information in the auxiliary information, a first resource index set corresponding to the PRS is determined, where the first resource index set includes: and finally, determining a second resource index set after the PRS is shifted on the frequency domain resource according to the target resource index and the first resource index set, wherein the CRB index occupied by the PRS and the RE index in each CRB, and the second resource index set is used for indicating the resource mapping position on the frequency domain when the PRS is received and transmitted. In the technical scheme, both the second standard network equipment and the terminal equipment for positioning can accurately determine the second resource index set of the PRS after the deviation on the frequency domain resource according to the determined information of the first frequency point and the PRS configuration information, and lay a foundation for receiving and transmitting the PRS at the determined position subsequently, thereby avoiding the reduction of the number of cells capable of frequency division multiplexing.

Fig. 11 is a schematic structural diagram of a first embodiment of a frequency domain resource mapping apparatus for PRS provided in an embodiment of the present application. The device can be integrated in the terminal equipment and can also be realized by the terminal equipment. As shown in fig. 11, the apparatus may include: a transceiver module 111 and a processing module 112.

The transceiver module 111 is configured to receive auxiliary information sent by a network device, where the auxiliary information includes: positioning PRS configuration information corresponding to a reference signal PRS and information of a first frequency point, wherein the auxiliary information is used for indicating offset information of the PRS on a frequency domain resource, and the first frequency point is a downlink frequency point of a cell of a first standard network;

optionally, the transceiver module 111 is further configured to send a first response message to the network device, where the first response message is used to indicate that the auxiliary information is received;

the processing module 112 is configured to determine, according to the auxiliary information received by the transceiver module 111, a resource mapping position on a frequency domain during the PRS transceiving;

the transceiver module 111 is further configured to receive the PRS sent by the network device of the second system at the resource mapping position determined by the processing module 112.

Optionally, the transceiver module 111 is further configured to send a second response message to the network device, where the second response message is used to indicate that the PRS is received.

Illustratively, in a possible design of this embodiment, the auxiliary information further includes: a frequency offset of the PRS.

For example, in another possible design of this embodiment, the information of the first frequency point is included in the PRS configuration information.

In any one of the above possible designs of the embodiment of the present application, the processing module 112 is specifically configured to determine, according to the information of the first frequency point in the auxiliary information, a target resource index corresponding to the first frequency point, where the target resource index is used to indicate a mapping resource position of the first frequency point on a frequency domain, and determine, according to the PRS configuration information in the auxiliary information, a first resource index set corresponding to the PRS, where the first resource index set includes: the common resource block CRB index occupied by the PRS and the resource element RE index in each CRB are used for determining a second resource index set after the PRS is shifted on frequency domain resources according to the target resource index and the first resource index set, wherein the second resource index set is used for indicating the resource mapping position on the frequency domain when the PRS is received and transmitted.

or

Or

Or

for the purpose of indexing the target resource,

is the number of REs in one resource block RB,

and

Illustratively, the network device includes: the system comprises network equipment of a second standard and a location management function LMF.

In another possible design of this embodiment, the information of the first frequency point is an absolute radio channel number ARFCN of a network cell of the second standard corresponding to the frequency of the first frequency point.

In another possible design of this embodiment, the information of the first frequency point is applicable to multiple cells for positioning, or the information of the first frequency point is applicable to one cell for positioning.

For example, when the information of the first frequency point is applicable to a cell for positioning, the information of the first frequency point is represented in any one of the following forms:

or

For example, if the information of the first frequency point is applicable to a plurality of cells for positioning, and one of the cells for positioning is a main serving cell, the information of the first frequency point is represented in any one of the following forms:

or

Illustratively, if the information of the first frequency point is applicable to a plurality of cells for positioning, and the plurality of cells for positioning include a serving cell of the network device, the information of the first frequency point is represented in any one of the following forms:

or

The apparatus of this embodiment may also be configured to execute the implementation schemes of the terminal device in the method embodiments shown in fig. 8 and fig. 9, where specific implementation manners and technical effects are similar and are not described herein again.

Fig. 12 is a schematic structural diagram of a second embodiment of a frequency domain resource mapping apparatus for PRS according to an embodiment of the present application. The device can be integrated in a network device, and can also be realized by the network device. As shown in fig. 12, the apparatus may include: an acquisition module 121 and a transceiver module 122.

The acquiring module 121 is configured to acquire information of a first frequency point and PRS configuration information corresponding to a positioning reference signal PRS, where the first frequency point is a downlink frequency point of a cell of a first standard network;

the transceiver module 122 is configured to send auxiliary information to the terminal device, where the auxiliary information includes: the PRS configuration information and the information of the first frequency point, wherein the auxiliary information is used for indicating offset information of the PRS on frequency domain resources.

Optionally, the transceiver module 122 is further configured to receive a first response message sent by a terminal device, where the first response message is used to indicate that the terminal device receives the auxiliary information.

Illustratively, in a possible design of the embodiment of the present application, the auxiliary information further includes: a frequency offset of the PRS.

For example, in another possible design of the embodiment of the present application, the information of the first frequency point is included in the PRS configuration information.

Illustratively, as shown in fig. 12, the apparatus further includes: a processing module 123.

The processing module 123 is configured to determine, according to the auxiliary information, a resource mapping position on a frequency domain when the PRS is transmitted and received;

the transceiver module 122 is further configured to transmit the PRS to the terminal device at the resource mapping position determined by the processing module 123.

Optionally, the transceiver module 122 is further configured to receive a second response message sent by the terminal device, where the second response message is used to indicate that the terminal device receives the PRS.

Exemplarily, the processing module 123 is specifically configured to determine a target resource index corresponding to the first frequency point according to the information of the first frequency point in the auxiliary information, where the target resource index is used to indicate a mapping resource position of the first frequency point on a frequency domain, and determine a first resource index set corresponding to the PRS according to the PRS configuration information in the auxiliary information, where the first resource index set includes: the common resource block CRB index occupied by the PRS and the resource element RE index in each CRB are used for determining a second resource index set after the PRS is shifted on frequency domain resources according to the target resource index and the first resource index set, wherein the second resource index set is used for indicating the resource mapping position on the frequency domain when the PRS is received and transmitted.

or

Or

Or

for the purpose of indexing the target resource,

is the number of REs in one resource block RB,

and

In another possible design of the embodiment of the present application, the apparatus is applied to a network device of a second standard and a location management function LMF.

As an example, when the apparatus is applied to the network device of the second standard, the obtaining module 121 is specifically configured to obtain the PRS configuration information configured by the LMF and the information of the first frequency point.

As another example, when the apparatus is applied to the LMF, the transceiver module 122 is further configured to send the PRS configuration information and the information of the first frequency point to the network device of the second standard.

As another example, when the apparatus is applied to the LMF, the obtaining module 121 is specifically configured to obtain PRS configuration information configured by the network device of the second standard and information of the first frequency point.

In another possible design of the embodiment of the present application, the information of the first frequency point is an absolute radio channel number ARFCN of a network cell of a second standard corresponding to the frequency of the first frequency point.

In another possible design of the embodiment of the present application, the information of the first frequency point is applicable to a plurality of cells for positioning, or the information of the first frequency point is applicable to one cell for positioning.

or

The apparatus of this embodiment may be used to execute the implementation schemes of the network devices in the method embodiments shown in fig. 8 and fig. 9, and specific implementation manners and technical effects are similar and will not be described again here.

It should be noted that the division of the modules of the above apparatus is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware.

For example, the processing module may be a processing element separately set up, or may be implemented by being integrated in a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and a function of the processing module may be called and executed by a processing element of the apparatus. Other modules are implemented similarly.

In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when some of the above modules are implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor that can call program code. As another example, these modules may be integrated together, implemented in the form of a system-on-a-chip (SOC).

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a readable storage medium or transmitted from one readable storage medium to another readable storage medium, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Fig. 13 is a schematic structural diagram of a third embodiment of a frequency domain resource mapping apparatus for PRS according to an embodiment of the present application. The device can be integrated in the terminal equipment and can also be realized by the terminal equipment.

In a hardware implementation, the transceiver module 111 may be a transceiver, and the transceiver forms a communication interface.

As shown in fig. 13, the apparatus may include: the system comprises a processor 131, a memory 132, a communication interface 133 and a system bus 134, wherein the memory 132 and the communication interface 133 are connected with the processor 131 through the system bus 134 and complete mutual communication, the memory 132 is used for storing computer execution instructions, the communication interface 133 is used for communicating with other devices, and when the processor 131 executes the computer execution instructions, the implementation scheme of the terminal device in the method embodiments shown in fig. 8 and 9 is realized.

Fig. 14 is a schematic structural diagram of a fourth embodiment of a frequency domain resource mapping apparatus for PRS provided in the embodiment of the present application. The device can be integrated in a network device, and can also be realized by the network device.

In a hardware implementation, the transceiver module 122 may be a transceiver, and the transceiver forms a communication interface.

As shown in fig. 14, the apparatus may include: the network device comprises a processor 141, a memory 142, a communication interface 143 and a system bus 144, wherein the memory 142 and the communication interface 143 are connected with the processor 141 through the system bus 144 and complete communication with each other, the memory 142 is used for storing computer execution instructions, the communication interface 143 is used for communicating with other devices, and the processor 141 executes the computer execution instructions to implement the implementation scheme of the network device in the method embodiments shown in fig. 8 and 9.

The system bus mentioned in fig. 13 or fig. 14 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The system bus may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus. The communication interface is used for realizing communication between the database access device and other equipment (such as a client, a read-write library and a read-only library). The memory may comprise Random Access Memory (RAM) and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

The processor may be a general-purpose processor, including a central processing unit CPU, a Network Processor (NP), and the like; but also a digital signal processor DSP, an application specific integrated circuit ASIC, a field programmable gate array FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components.

Optionally, an embodiment of the present application provides a storage medium, where instructions are stored in the storage medium, and when the instructions are run on a computer, the instructions cause the computer to execute an implementation scheme of the terminal device in the method embodiments shown in fig. 8 and fig. 9.

Optionally, an embodiment of the present application further provides a storage medium, where instructions are stored in the storage medium, and when the storage medium is run on a computer, the storage medium causes the computer to execute an implementation scheme of the network device in the method embodiments shown in fig. 8 and fig. 9.

Optionally, the processor 131 and the memory 132 may be integrated in an application specific integrated circuit, and the integrated circuit may further include the communication interface 133. The application specific integrated circuit may be a processing chip or a processing circuit. The communication interface 133 may be a communication interface including wireless transmission and reception, an interface of a digital signal input after processing a received wireless signal by another processing circuit, or a software or hardware interface for communicating with another module. The memory stores code and data, the memory is coupled to the processor, and the processor executes the code in the memory to make the chip execute the implementation scheme of the terminal device in the method embodiments shown in fig. 8 and fig. 9.

Optionally, the processor 141 and the memory 142 may be integrated in an application specific integrated circuit, and the integrated circuit may further include the communication interface 143. The application specific integrated circuit may be a processing chip or a processing circuit. The communication interface 143 may be a communication interface including wireless transmission and reception, an interface of a digital signal input after processing a received wireless signal by another processing circuit, or a software or hardware interface for communicating with another module. The memory is coupled to the processor, and the processor executes the code in the memory to make the chip execute the implementation scheme of the network device in the method embodiments shown in fig. 8 and fig. 9.

An embodiment of the present application further provides a program product, where the program product includes a computer program, where the computer program is stored in a storage medium, and at least one processor may read the computer program from the storage medium, and when the at least one processor executes the computer program, the at least one processor may implement the implementation scheme of the terminal device in the method embodiments shown in fig. 8 and fig. 9.

An embodiment of the present application further provides a program product, where the program product includes a computer program, where the computer program is stored in a storage medium, and at least one processor may read the computer program from the storage medium, and when the at least one processor executes the computer program, the at least one processor may implement the implementation of the network device in the method embodiments shown in fig. 8 and fig. 9.

Fig. 15 is a schematic structural diagram of an embodiment of a communication system according to the present application. As shown in fig. 15, the communication system may include: terminal equipment 151, second-system network equipment 152, LMF 153, and first-system network equipment 154. Second-system network device 152, LMF 153, and first-system network device 154 may all perform wireless communication with terminal device 151, and second-system network device 152 and first-system network device 154 may also perform wireless communication with LMF 153.

Wherein, the terminal device 151 may be a frequency domain resource mapping apparatus of PRS according to the embodiment shown in fig. 11 or fig. 13; the second-system network device 152 and the LMF 153 may be the frequency domain resource mapping apparatus of the PRS according to the embodiment shown in fig. 12 or fig. 14.

For example, in this embodiment, the terminal device 151 may receive auxiliary information sent by the network device 152 of the second standard and the LMF 153, and determine, based on PRS configuration information corresponding to a PRS in the auxiliary information and information of a first frequency point, a resource mapping position on a frequency domain when the PRS is received and transmitted; second-system network device 152 and LMF 153 may obtain information of the first frequency point and PRS configuration information corresponding to the PRS, and send auxiliary information including the PRS configuration information corresponding to the PRS and the information of the first frequency point to the terminal device.

In this embodiment, for specific implementation manners of the terminal device 151, the second-standard network device 152, and the LMF 153, reference may be made to the descriptions in the foregoing embodiments, and details are not described here.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship; in the formula, the character "/" indicates that the preceding and following related objects are in a relationship of "division". "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of the present application.

It should be understood that, in the embodiment of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiment of the present application.

Claims

1. A frequency domain resource mapping method of a Positioning Reference Signal (PRS) is applicable to terminal equipment, and is characterized by comprising the following steps:

receiving auxiliary information sent by a network device, wherein the auxiliary information comprises: positioning PRS configuration information corresponding to a reference signal PRS and information of a first frequency point, wherein the auxiliary information is used for indicating offset information of the PRS on a frequency domain resource, and the first frequency point is a downlink frequency point of a cell of a first standard network;

receiving the PRS sent by the network equipment of the second standard at the resource mapping position;

the determining, according to the auxiliary information, a resource mapping location on a frequency domain when the PRS is transmitted and received includes:

2. The method of claim 1, wherein the assistance information further comprises: a frequency offset of the PRS.

3. The method of claim 1, wherein the information of the first frequency point is included in the PRS configuration information.

4. The method of claim 1, wherein the second resource index set is implemented as any one of:

or

Or

Or

for the purpose of indexing the target resource,

is the number of REs in one resource block RB,

and

5. The method according to any of claims 1-4, wherein the network device comprises: the system comprises network equipment of a second standard and a location management function LMF.

6. The method according to any one of claims 1 to 4, wherein the information of the first frequency point is an absolute radio channel number (ARFCN) of a network cell of a second standard corresponding to the frequency of the first frequency point.

7. The method according to any of claims 1-4, characterized in that the information of the first frequency point is applicable to a plurality of cells for positioning or the information of the first frequency point is applicable to one cell for positioning.

8. The method according to claim 7, wherein when the information of the first frequency point is applicable to a cell for positioning, the information of the first frequency point is represented in any one of the following forms:

or

9. A frequency domain resource mapping method of a Positioning Reference Signal (PRS) is applicable to network equipment, and is characterized by comprising the following steps:

acquiring information of a first frequency point and PRS configuration information corresponding to a positioning reference signal PRS, wherein the first frequency point is a downlink frequency point of a cell of a first standard network;

sending auxiliary information to a terminal device, wherein the auxiliary information comprises: the PRS configuration information and the information of the first frequency point, wherein the auxiliary information is used for indicating the offset information of the PRS on frequency domain resources;

the method further comprises the following steps:

transmitting the PRS to the terminal device at the resource mapping location;

10. The method of claim 9, wherein the assistance information further comprises: a frequency offset of the PRS.

11. The method of claim 9, wherein the information of the first frequency point is included in the PRS configuration information.

12. The method of claim 9, wherein the second resource index set is implemented as any one of:

or

Or

Or

for the purpose of indexing the target resource,

is the number of REs in one resource block RB,

and

13. The method according to any of claims 9-12, wherein the network device comprises: the system comprises network equipment of a second standard and a location management function LMF.

14. The method of claim 13, wherein the obtaining information of the first frequency point and PRS configuration information corresponding to a positioning reference signal PRS includes:

15. The method of claim 13, further comprising:

16. The method of claim 13, wherein the obtaining information of the first frequency point and PRS configuration information corresponding to a positioning reference signal PRS includes:

17. The method according to any of claims 9-12, wherein the information of the first frequency point is an absolute radio channel number ARFCN of a network cell of the second standard corresponding to the frequency of the first frequency point.

18. An apparatus for frequency domain resource mapping of PRS, comprising: a transceiver module and a processing module;

the transceiver module is further configured to receive the PRS sent by the network device of the second standard at the resource mapping position determined by the processing module;

the processing module is specifically configured to determine, according to the information of the first frequency point in the auxiliary information, a target resource index corresponding to the first frequency point, where the target resource index is used to indicate a resource mapping position of the first frequency point on a frequency domain, and determine, according to the PRS configuration information in the auxiliary information, a first resource index set corresponding to the PRS, where the first resource index set includes: the common resource block CRB index occupied by the PRS and the resource element RE index in each CRB are used for determining a second resource index set after the PRS is shifted on frequency domain resources according to the target resource index and the first resource index set, wherein the second resource index set is used for indicating the resource mapping position on the frequency domain when the PRS is received and transmitted.

19. The apparatus of claim 18, wherein the assistance information further comprises: a frequency offset of the PRS.

20. The apparatus of claim 18, wherein the information of the first frequency point is included in the PRS configuration information.

21. The apparatus of claim 18, wherein the second resource index set is implemented as any one of:

or

Or

Or

for the purpose of indexing the target resource,

is the number of REs in one resource block RB,

and

22. The apparatus according to any of claims 18-21, wherein the network device comprises: the system comprises network equipment of a second standard and a location management function LMF.

23. The apparatus according to any of claims 18-21, wherein the information of the first frequency point is an absolute radio channel number ARFCN of a network cell of the second standard corresponding to the frequency of the first frequency point.

24. The apparatus according to any of claims 18-21, wherein the information of the first frequency point is applicable to a plurality of cells for positioning, or the information of the first frequency point is applicable to one cell for positioning.

25. The apparatus of claim 24, wherein when the information of the first frequency point is applicable to a cell for positioning, the information of the first frequency point is represented in any one of the following forms:

or

26. An apparatus for frequency domain resource mapping of PRS, comprising: the device comprises an acquisition module and a transceiver module;

the transceiver module is configured to send auxiliary information to a terminal device, where the auxiliary information includes: the PRS configuration information and the information of the first frequency point, wherein the auxiliary information is used for indicating the offset information of the PRS on frequency domain resources;

the device further comprises: a processing module;

the transceiver module is further configured to transmit the PRS to the terminal device at the resource mapping position determined by the processing module;

27. The apparatus of claim 26, wherein the assistance information further comprises: a frequency offset of the PRS.

28. The apparatus of claim 26, wherein the information of the first frequency point is included in the PRS configuration information.

29. The apparatus of claim 26, wherein the second resource index set is implemented as any one of:

or

Or

Or

for the purpose of indexing the target resource,

is the number of REs in one resource block RB,

and

30. The apparatus according to any of claims 26-29, wherein the apparatus is applied to a network device of the second system and a location management function, LMF.

31. The apparatus of claim 30, wherein when the apparatus is applied to the network device of the second standard, the obtaining module is specifically configured to obtain the PRS configuration information configured by the LMF and the information of the first frequency point.

32. The apparatus of claim 30, wherein when the apparatus is applied to the LMF, the transceiver module is further configured to send the PRS configuration information and the information of the first frequency point to a network device of the second standard.

33. The apparatus of claim 30, wherein when the apparatus is applied to the LMF, the obtaining module is specifically configured to obtain PRS configuration information configured by the network device of the second standard and information of the first frequency point.

34. The apparatus according to any of claims 26-29, wherein the information of the first frequency point is an absolute radio channel number ARFCN of a network cell of the second standard corresponding to the frequency of the first frequency point.

35. A communication device comprising a processor, wherein the processor is configured to perform the method of any one of claims 1-8; or

The processor is configured to perform the method of any of the preceding claims 9-17.

36. An apparatus for frequency domain resource mapping of PRS, comprising a processor, a memory and a computer program stored on the memory and executable on the processor, wherein the processor implements the method according to any one of the preceding claims 1 to 8 when executing the program; or

The processor, when executing the program, implements the method of any of claims 9-17 above.

37. A storage medium having stored therein instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-8; or

When run on a computer, cause the computer to perform the method of any of claims 9-17 above.