WO2020177521A1

WO2020177521A1 - Prs frequency domain resource mapping method and apparatus, and storage medium

Info

Publication number: WO2020177521A1
Application number: PCT/CN2020/075585
Authority: WO
Inventors: 黄甦; 史桢宇
Original assignee: 华为技术有限公司
Priority date: 2019-03-07
Filing date: 2020-02-17
Publication date: 2020-09-10
Also published as: CN111669257B; CN111669257A

Abstract

Provided in embodiments of the present application are a PRS frequency domain resource mapping method and apparatus, and a storage medium, which are used to solve the problem of the coordination of reference signal resources between networks having different standards when cells of the networks having different standards deploy and send PRSs in the same frequency band. The method comprises: a network device acquiring information of a first frequency point and PRS configuration information corresponding to a PRS, and sending the information of the first frequency point and the PRS configuration information corresponding to the PRS to a terminal device by means of auxiliary information; according to the received auxiliary information, the terminal device determining the resource mapping position of the PRS on the frequency domain during reception and sending, and, on the resource mapping position, receiving a PRS sent by a network device having a second standard.

Description

PRS frequency domain resource mapping method, device and storage medium

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on March 07, 2019, the application number is 201910172085.4, and the application name is "PRS frequency domain resource mapping method, device and storage medium", the entire content of which is incorporated by reference Incorporated in this application.

Technical field

This application relates to the field of communication technology, and in particular to a method, device and storage medium for mapping frequency domain resources of PRS.

Background technique

With the continuous development of communication technology, communication between terminals and network nodes has become a common communication between devices. It is more and more important for the network node to locate the terminal, or for the terminal to request location services to implement specific applications. In the fifth generation of mobile communications (5th generation mobile networks or 5th generation wireless systems, 5G), the new radio (NR) will have higher requirements for positioning accuracy. Similar to the traditional long term evolution (LTE) system, the 5G system will also use positioning reference signals (positioning reference signals, PRS) to locate terminals.

For 5G systems, operators can deploy cells of the new radio (NR) system on the spectrum of the existing LTE system, and gradually replace the cells of LTE to achieve network upgrades. Therefore, for a long period of time, LTE cells and NR cells of the same operator will coexist on the same spectrum.

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.

Summary of the invention

The embodiments of the present application provide a method, device, and storage medium for frequency domain resource mapping of PRS to solve the resource coordination problem between the LTE system and the NR system.

The first aspect of this application provides a PRS frequency domain resource mapping method, which is suitable for terminal equipment. The method includes: the terminal equipment receives auxiliary information sent by the network device, the auxiliary information includes: PRS configuration information corresponding to the PRS and the first frequency Point information, the auxiliary information is used to indicate the offset information of the PRS on the frequency domain resources, the first frequency point is the downlink frequency point of the cell of the first-standard network, and the PRS transceiver is determined according to the auxiliary information The resource mapping position in the time and frequency domain, and receiving the PRS sent by the second-standard network device at the resource mapping position.

In this embodiment, the terminal device can accurately determine the resource mapping position after the offset of the positioning reference signal based on the received auxiliary information, which solves the problem of frequency division multiplexing when cells of different standard networks are deployed in the same frequency band to transmit PRS. The problem of number reduction avoids resource waste and solves the resource coordination problem between the LTE system and the NR system.

In this embodiment, the network device can send the information of the first frequency point to the terminal device in an explicit configuration mode, 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. The processing time of the terminal equipment is reduced, and the frequency domain resource mapping efficiency is improved.

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

In this embodiment, the frequency offset of the PRS can be used to indicate the number of subcarriers that need to be offset to the right of the first frequency point when the PRS is mapped to the frequency domain, so that the terminal device can directly determine the frequency of the PRS The offset reduces 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 mode, that is, by including the information of the first frequency point in the PRS configuration information, and then sends the PRS configuration information through auxiliary information For terminal equipment, this can improve communication security. In this implementation manner, there is no need to explicitly configure the information of the first frequency point, which saves signaling overhead compared to the manner of displaying the information of the first frequency point.

In still another possible design of the first aspect, the determining, according to the auxiliary information, the resource mapping position in the frequency domain when the PRS is transmitted and received includes:

Determine the 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 the mapping resource position of the first frequency point in the frequency domain ；

According to the PRS configuration information in the auxiliary information, a first resource index set corresponding to the PRS is determined, the first resource index set including: the common resource block CRB index occupied by the PRS and the resources in each CRB Element RE index;

According to the target resource index and the first resource index set, a second resource index set after the PRS is offset on the frequency domain resource is determined, and the second resource index set is used to indicate when the PRS is receiving and transmitting The resource mapping position in the frequency domain.

In this embodiment, the second-standard network equipment and terminal equipment used for positioning can both accurately determine the second resource index set after the PRS is offset on the frequency domain resources according to the determined first frequency point information and PRS configuration information. This lays the foundation for the subsequent PRS transmission and reception at a certain location, thereby avoiding the reduction of the number of frequency division multiplexed cells.

Optionally, the second resource index set is any one of the following implementation modes:

or

And

or

And

Wherein, Q ₂ represents the second resource index set, Q ₁ represents the first resource index set, k represents the resource index in Q ₂ and k ₁ is the resource index in Q ₁ ,

Index for the target resource,

Is the number of REs in a resource block RB,

with

Are the smallest CRB index and the largest CRB index of the bandwidth occupied by the PRS,

Represents the set of CRB indexes occupied by the PRS, and n is the frequency offset of the PRS.

In this embodiment, the second resource index set can be implemented in a variety of possible implementation manners. The terminal equipment and network equipment can transmit and receive PRS at the resource mapping position corresponding to the second resource index set, which solves the problem of communication between the LTE system and the NR system. Resource coordination issues.

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

The second aspect of the present application provides a method for mapping frequency domain resources of PRS, which is suitable for network equipment. The method includes: the network equipment obtains information of a first frequency point and PRS configuration information corresponding to a positioning reference signal PRS, and the first frequency The point is the downlink frequency point of the cell of the first-standard network, and auxiliary information is sent to the terminal device. The auxiliary information includes: the PRS configuration information and the information of the first frequency point, and the auxiliary information is used to indicate the PRS offset information 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 after the offset of the positioning reference signal based on the received auxiliary information The mapping position solves the problem of reducing the number of frequency division multiplexed cells when cells of different standard networks are deployed in the same frequency band to send PRS, avoiding resource waste, and solving the resource coordination problem between the LTE system and the NR system.

In a possible design of the second aspect, the auxiliary information further includes: the 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:

Determine, according to the auxiliary information, the resource mapping position in the frequency domain when the PRS is transmitted and received;

Sending the PRS to the terminal device at the resource mapping position.

In the foregoing possible design of the second aspect, the determining, according to the auxiliary information, the resource mapping position in the frequency domain when the PRS is transmitted and received includes:

or

And

or

And

Index for the target resource,

Is the number of REs in a resource block RB,

with

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

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

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

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

The LMF obtains the PRS configuration information configured by the second-standard network device and the information of the first frequency point.

For the beneficial technical effects of each possible design in the second aspect that are not exhaustive, please refer to the record in the first aspect, and will not be repeated here.

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

The transceiver module is configured to receive auxiliary information sent by a network device, the auxiliary information includes: PRS configuration information corresponding to the positioning reference signal PRS and information about the first frequency point, and the auxiliary information is used to indicate that the PRS is in frequency Offset information on domain resources, where 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, the resource mapping position in the frequency domain when the PRS is transmitted and received;

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

In a possible design of the third aspect, the auxiliary information further includes: the 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 another possible design of the third aspect, the processing module is specifically configured to determine the target resource index corresponding to the first frequency point according to the information of the first frequency point in the auxiliary information, and the The target resource index is used to indicate the mapping resource position of the first frequency point in the frequency domain, and the first resource index set corresponding to the PRS is determined according to the PRS configuration information in the auxiliary information, and the first resource The index set includes: the common resource block CRB index occupied by the PRS and the resource element RE index in each CRB, and according to the target resource index and the first resource index set, it is determined that the PRS is on the frequency domain resource An offset second resource index set, where the second resource index set is used to indicate a resource mapping position in the frequency domain when the PRS is received and received.

or

And

or

And

Index for the target resource,

Is the number of REs in a resource block RB,

with

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

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

The acquiring module 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 is configured to send auxiliary information to a terminal device, the auxiliary information includes: the PRS configuration information and information about the first frequency point, and the auxiliary information is used to indicate that the PRS is on frequency domain resources Offset information.

In a possible design of the fourth aspect, the auxiliary information further includes: the 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 still another possible design of the fourth aspect, the device further includes: a processing module;

The processing module is configured to determine, according to the auxiliary information, the resource mapping position in the 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 location determined by the processing module.

In the foregoing possible design of the fourth aspect, the processing module is specifically configured to determine the target resource index corresponding to the first frequency point according to the information of the first frequency point in the auxiliary information, and the target resource The index is used to indicate the mapping resource position of the first frequency point in the frequency domain, and the first resource index set corresponding to the PRS is determined according to the PRS configuration information in the auxiliary information, and the first resource index set Including: the common resource block CRB index occupied by the PRS and the resource element RE index in each CRB, and determining the offset of the PRS on the frequency domain resource according to the target resource index and the first resource index set The latter second resource index set, where the second resource index set is used to indicate the resource mapping position in the frequency domain when the PRS is transmitted and received.

or

And

or

And

Index for the target resource,

Is the number of REs in a resource block RB,

with

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

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

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

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 second-standard network device and the first frequency point Information.

For the beneficial technical effects of the third aspect and the fourth aspect that are not detailed in the possible designs, please refer to the records in the first aspect and the second aspect, which will not be repeated here.

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

In the embodiment of this application, since ARFCN can be used to identify the number of a special radio frequency channel, 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 can improve the identification of terminal equipment The ability of this first frequency point. In this way, multiple second-standard network cells can share a frequency of the first frequency point, which saves signaling overhead.

In another possible design of the first to fourth aspects, the information of the first frequency point is applicable to multiple cells used for positioning, or the information of the first frequency point is applicable to one cell used for positioning Of the cell.

Optionally, when the information of the first frequency point is applicable to a cell used for positioning, the information of the first frequency point may be expressed in any of the following forms:

The information of the first frequency point is the common resource block CRB index corresponding to the frequency of the first frequency point and the RE index in the CRB corresponding to the CRB index, and the CRB is located on the downlink carrier of the cell used for positioning on;

or

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

or

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

In this embodiment, the information of the first frequency point is expressed by the cell used for positioning, which saves the signaling overhead more than the expression using ARFCN.

Optionally, if the information of the first frequency point is applicable to multiple cells used for positioning, and one of the multiple cells used for positioning is the primary serving cell, the information of the first frequency point adopts any one of the following A form of representation:

The information of the first frequency point is the CRB index corresponding to the frequency of the first frequency point and the RE index in the CRB corresponding to the CRB index, and the CRB is located on the downlink carrier of the primary serving cell;

or

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

or

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

In this embodiment, the information of the first frequency point is indicated by the index in the primary serving cell and is applicable to multiple cells, which further saves overhead.

Optionally, if the information of the first frequency point is applicable to multiple cells used for positioning, and the multiple cells used for positioning include the serving cell of the network device, the information of the first frequency point adopts any of the following forms Means:

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

or

The information of the first frequency point is the CRB index corresponding to the frequency of the first frequency point, the CRB corresponding to the CRB index is located on the downlink carrier of the serving cell, and the RE index in the CRB is a preset value , 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 the resource index of the frequency of the first frequency point relative to the second frequency point, and the second frequency point is the point A of the serving cell.

In this embodiment, the information of the first frequency point is indicated by the index of the serving cell of the network device, which not only saves overhead, but also extends any serving cell, which has a wider applicability.

The fifth aspect of the present application provides a PRS frequency domain resource mapping device, including a processor, a memory, and a computer program stored on the memory and capable of running on the processor. The processor executes the program as follows: The methods described in the above first aspect and various possible designs of the first aspect.

The sixth aspect of the present application provides a PRS frequency domain resource mapping device, including a processor, a memory, and a computer program stored on the memory and capable of running on the processor. When the processor executes the program, the implementation is as follows The methods described in the above second aspect and various possible designs of the second aspect.

The seventh aspect of the present application provides a storage medium that stores instructions in the storage medium, which when run on a computer, causes the computer to execute the methods described in the first aspect and various possible designs of the first aspect .

The eighth aspect of the present application provides a storage medium that stores instructions in the storage medium, which when run on a computer, causes the computer to execute the methods described in the above second aspect and various possible designs of the second aspect .

The ninth aspect of the present application provides a program product containing instructions, which when run on a computer, causes the computer to execute the methods described in the first aspect and various possible designs of the first aspect.

The tenth aspect of the present application provides a program product containing instructions, which when run on a computer, causes the computer to execute the methods described in the second aspect and various possible designs of the second aspect.

The eleventh aspect of the present application provides a chip that includes a memory and a processor. The memory stores code and data. The memory is coupled to the processor. The processor runs the code in the memory so that the chip is used to execute the first Aspects and the methods described in the various possible designs of the first aspect.

A twelfth aspect of the present application provides a chip. The chip includes a memory and a processor. The memory stores code and data. The memory is coupled to the processor. The processor runs the code in the memory so that the chip is used to execute the second Aspect and the methods described in the various possible designs of the second aspect.

A thirteenth aspect of the present application provides a communication system, including: terminal equipment, second-standard network equipment, LMF, and first-standard network equipment;

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

The second-standard network equipment and the LMF are the devices described in the fourth aspect and various possible designs of the fourth aspect.

According to the method, device and storage medium for frequency domain resource mapping of PRS provided by the embodiments of the present application, the network device obtains the information of the first frequency point and the PRS configuration information corresponding to the PRS, and configures the information of the first frequency point and the PRS corresponding to the PRS The information is sent to the terminal device through the auxiliary information. The terminal device determines the resource mapping position in the frequency domain when the PRS is sent and received according to the received auxiliary information, and receives the PRS sent by the second-standard network device at the resource mapping position, that is, The terminal device can determine the resource mapping position after the offset of the positioning reference signal based on the indication of the auxiliary information, which solves the problem of reducing the number of frequency division multiplexed cells when cells of different standard networks are deployed in the same frequency band to transmit PRS, that is, The problem of resource coordination between the LTE system and the NR system is solved.

Description of the drawings

FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of this application;

FIG. 2 is a schematic structural diagram of another communication system provided by an embodiment of this application;

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

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

Figure 5 is a resource mapping diagram in the frequency domain after modulation of the downlink signal in the NR system;

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

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

FIG. 8 is an interaction schematic diagram of Embodiment 1 of a method for mapping frequency domain resources of a PRS provided by an embodiment of this application;

FIG. 9 is a schematic flowchart of Embodiment 2 of a method for mapping frequency domain resources of PRS according to an embodiment of this application;

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;

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 through a third possible implementation manner;

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

FIG. 11 is a schematic structural diagram of Embodiment 1 of a device for mapping frequency domain resources of PRS according to an embodiment of this application;

FIG. 12 is a schematic structural diagram of Embodiment 2 of a PRS frequency domain resource mapping apparatus provided by an embodiment of this application;

FIG. 13 is a schematic structural diagram of Embodiment 3 of a device for mapping frequency domain resources of PRS according to an embodiment of this application;

FIG. 14 is a schematic structural diagram of Embodiment 4 of a device for mapping frequency domain resources of PRS according to an embodiment of this application;

FIG. 15 is a schematic structural diagram of an embodiment of a communication system provided by an embodiment of this application.

detailed description

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

AMF: Access and mobility management function (access and mobility management function, AMF) The main functions include: connection management, mobility management, registration management, access authentication and authorization, reachability management, security context management, etc. access Functions related to mobility.

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

LMC: The location management component (LMC) is a part of the functional components of the LMF, which can be integrated in the base station of the second-standard network on the next-generation radio access network (NG-RAN) side. For example, 5G base station (gNodeB, gNB)).

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

Exemplarily, in the embodiment shown in FIG. 1, the core network equipment in the core network 13 can be divided into components with AMF and LMF functions. AMF can implement functions such as gateways, LMF can implement functions such as positioning centers, and AMF It can communicate with LMF. For example, AMF and LMF can be connected through an NLs interface.

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

Exemplarily, the wireless access device may include one or more devices of a first-standard network and devices of a second-standard network. In the embodiment shown in FIG. 1, the equipment of the first-standard network may be a next-generation LTE base station (Next-generation eNodeB, ng-eNB), for example, an LTE base station accessing a 5G core network, and the ng-eNB It may have a transmission point (TP) and a receiving point (receiving point, RP). The equipment of the second-standard network may be a 5G base station (gNodeB, gNB), that is, a 5G base station that accesses a 5G core network. Among them, the gNB is a device that is deployed in a wireless access network and meets the 5G standard and provides wireless communication functions for terminal equipment.

Exemplarily, the terminal device 11 may include one or more user equipment (user equipment, UE). The wireless access device can access to the core network 13 via AMF. For example, the ng-eNB and gNB can access to the core network 13 via the AMF via the NG-C interface, and the terminal device 11 can access to the core network 13 via the wireless access device. In the radio access network 12, for example, the terminal device 11 accesses the radio access network via the ng-eNB through the LTE air interface (LTE-Uu), and accesses the radio access network via the gNB via the NR air interface (NR-Uu). Into the network 12.

Exemplarily, FIG. 2 is a schematic structural diagram of another communication system provided by an embodiment of this application. As shown in FIG. 2, the difference between this communication system and the communication system shown in FIG. 1 is that the equipment of the second-standard network includes an LMC, and the LMC can assume part of the functions of the LMF. Exemplarily, referring to FIG. 2, the gNB has TP, RP, and LMC. In this way, in actual applications, when implementing this part of the LMF function, the equipment of the second-standard network does not need to access the core network via the AMF, thereby reducing the signaling delay and avoiding the terminal location 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. For a detailed description in the embodiment shown in FIG. 2, reference may be made to the record in the embodiment shown in FIG. Repeat.

Exemplarily, 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 an embodiment, the core network device and the wireless access device may be two independent different physical devices. In another embodiment, the function of the core network device and the logical function of the wireless access device may also be integrated on the same physical device. In still another embodiment, only part of the functions of the core network device and part of the functions of the wireless access device may be integrated on one physical device.

Optionally, the devices shown in FIG. 1 and FIG. 2 may include single or multiple second-standard network devices, single or multiple terminal devices. Each second-standard network device can transmit data or control signaling to a single or multiple terminal devices. Multiple second-standard network devices can also simultaneously transmit data or control signaling for each terminal device. The embodiments of the present application do not limit the number of core network devices, wireless access devices, and terminal devices included in the communication system, which can be set according to actual conditions.

It is understandable that the communication systems shown in Figures 1 and 2 are only schematic diagrams. In fact, the communication system may also include other devices, such as wireless relay devices and wireless backhaul devices, or network controllers, mobile management Entities and other network entities, the embodiment of this application is not limited to this.

Exemplarily, 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, and a wideband code division multiple access (wideband) system. code division multiple access (WCDMA) system, long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), general mobile communication system (Universal mobile telecommunication system, UMTS), and other wireless communication systems using orthogonal frequency division multiplexing (OFDM) technology. The system architecture and business scenarios described in the embodiments of this application are to illustrate the technical solutions of the embodiments of this application more clearly, and do not constitute a limitation to the technical solutions provided in the embodiments of this application. Those of ordinary skill in the art will know that with the network With the evolution of architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

In the embodiment of the present application, the wireless access device in the network device may be used to provide a wireless communication function for the terminal device, so that the terminal device can access the communication system in a wireless manner. The wireless access device may include various forms of macro base stations, micro base stations (also called small stations), relay stations, access points, and so on. The wireless access equipment can be a base transceiver station (BTS) in CDMA, a base station (nodeB, NB) in WCDMA, or an evolutional node B, eNB or e-station in LTE. NodeB), and may be the corresponding device gNB in the 5G network, the base station in the future communication system, or the access node in the WiFi system, etc. The embodiments of this application differ from the specific technology and specific device form adopted by the wireless access device. Make a limit. For ease of description, in all the embodiments of the present application, the above-mentioned devices that provide wireless communication functions for terminal devices are collectively referred to as wireless access devices.

Exemplarily, in the embodiments of the present application, the terminal device may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem. Optionally, the terminal device may also be called user equipment (UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), terminal (terminal), etc., and the terminal device may be A radio access network (RAN) communicates with one or more core network devices. For example, the terminal device may be a mobile phone (or called a cellular phone), a computer with a mobile terminal, etc. , Terminal equipment can also be portable, pocket-sized, handheld, computer-built or vehicle-mounted mobile devices, which exchange language and/or data with the wireless access network. Specifically, the terminal device may also be a mobile phone (mobile phone), subscriber unit (subscriber unit), smart phone (smart phone), wireless data card, personal digital assistant (PDA) computer, tablet computer, wireless modem (modem), handheld device (handset), laptop computer (laptop computer), machine type communication (machine type communication, MTC) terminal, etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device.

Optionally, network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on airborne aircraft, balloons, and satellites. The embodiments of the present application do not limit the application scenarios of network equipment and terminal equipment.

The following first briefly describes the application scenarios of the embodiments of the present application.

Specifically, first introduce the mapping rules of LTE cells for baseband DC signals and the mapping rules of NR cells for baseband DC signals.

In the first-standard network system, for example, in the LTE system, the downlink signal mapping rule in the frequency domain is that the downlink signal cannot be mapped to the subcarrier corresponding to the direct current (DC) component of the baseband, that is, the downlink When the signal is mapped from the time domain to the frequency domain, the subcarriers corresponding to the DC component are skipped.

Optionally, in the LTE system, the formula for converting the downlink signal in the time-frequency domain is as shown in formula (1), and the resource mapping diagram of the downlink signal in the frequency domain is shown with reference to FIG. 3. Exemplarily, FIG. 3 is a resource mapping diagram in the frequency domain after modulation of the downlink signal in the LTE system.

among them,

Represents the downlink signal,

Represents the modulation symbol corresponding to the RE with index (k ^(-) ,l) on port p, where

Indicates the modulation symbol corresponding to RE with index (k ⁽⁺⁾ ,l) on port p, where

Is the number of RBs of the downlink carrier,

Is the number of REs of one RB, N _CP,l T _s represents the cyclic prefix (CP) length of symbol l, and N _CP,l represents the number of T _s corresponding to the CP length of symbol l,

The basic time unit defined for LTE, k is an intermediate variable, which represents the subcarrier sequence 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 DC component viewed from the perspective of the baseband signal. After up-conversion, the subcarrier corresponding to the DC component is directly moved to the frequency of the downlink cell. Optionally, a symbol (symbol) on a frequency subcarrier and a time domain is referred to as a resource element (resource element, RE). Therefore, as shown in FIG. 3, in the time-frequency domain resource map, the subcarrier corresponding to the DC component is called the 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 Figure 4, in this embodiment, the downlink signal is

It passes through the separator to

Divided into real parts

And imaginary part

Real

The result and the imaginary part after interacting with the mixing signal cos(2πf ₀ t)

The result of the action with the mixing signal -sin(2πf ₀ t) is superimposed and then filtered by the filter to obtain the modulated data.

Because in the up conversion process, the input terminal of the inverter will act on the input signal and the local oscillation signal at the same time, so the downstream signal may be mixed from the mixer into the mixing signal cos(2πf ₀ ) during the up conversion process. t) and sin(2πf ₀ t), thereby causing greater interference to the downlink signal, resulting in that the downlink signal is not suitable for modulating data. Therefore, in the LTE system, the subcarrier corresponding to the DC component in the downlink signal is not used for modulating data.

In practical applications, due to the relatively simple design of the first-standard network, such as the LTE system, the network equipment and terminal equipment will work at the same transceiver frequency, and simply reserving the sub-carrier corresponding to the DC component will not cause any problems. .

With the development of network technology, the NR system emerged. Since the NR system took into account the requirements of large bandwidth, multi-subcarrier spacing, and in-band carrier aggregation (CA) in the early design stage, the subcarriers corresponding to the DC component were also Used to modulate data.

Optionally, in the NR system, the formula for converting the downlink signal in the time-frequency domain is as shown in formula (2), and the resource mapping diagram of the downlink signal in the frequency domain is shown in FIG. 5. Exemplarily, FIG. 5 is a resource mapping diagram in the frequency domain after modulation of the downlink signal in the NR system, and the RE occupied by the DC component may also modulate data.

among them,

In the above formula,

Represents the downlink signal,

Represents the modulation symbol corresponding to the RE whose parameter set μ is indexed (k,l) on port p,

Indicates the number of RBs contained in the resource grid of the parameter set μ,

Represents the number of REs of an RB,

Represents the number of REs that differ between the resource grid center of the parameter set μ and the resource grid center of a fixed parameter set μ ₀ ,

Is the number of T _c corresponding to the lth OFDM length under the parameter set μ,

Is the basic time unit defined by NR,

Represents the CP start time of the lth symbol in the parameter set μ,

It means that uplink x=UL or downlink x=DL parameter set μ ₀ resource grid starting CRB index, k is an intermediate variable, and indicates the subcarrier sequence number of OFDM modulation, l is the OFDM symbol index, and p is the port number.

In the NR system, the sub-carrier corresponding to the DC component can also modulate the data in order to weaken the concept of the carrier from the perspective of resource mapping, so as to achieve flexible bandwidth configuration between terminal equipment and network equipment. For example: when a large-bandwidth cell serves a small-bandwidth terminal device, the terminal device can work in any frequency domain position of the cell carrier. When multiple cells with continuous spectrum perform carrier aggregation to serve a large-bandwidth terminal device, the terminal device A set of radio frequencies can be used to receive multiple cells. Regardless of the scenario, the terminal device does not need to consider where it needs to skip the DC of one or more carriers during resource mapping.

Optionally, part of the spectrum defined by NR is actually the LTE spectrum. In this way, operators can deploy NR cells on the existing LTE spectrum and gradually replace LTE cells to achieve network upgrades. For a long period of time, LTE cells and NR cells of the same operator will coexist on the same spectrum.

Exemplarily, in a positioning technology based on observed time difference of arrival (OTDOA), especially in a scenario where NR and LTE are deployed in the same frequency band, the serving cell and neighboring cells may be NR cells and LTE cells, respectively, and the NR cell will When the NR positioning reference signal is sent, the LTE cell will send the LTE PRS. When the NR positioning reference signal subcarrier spacing is the same as the LTE PRS subcarrier spacing (that is, 15kHz at the same time), the two can be divided by frequency The multiplexing method avoids interference, as shown in Figure 6. 6 is a schematic diagram of resource distribution of frequency division multiplexing of LTE positioning reference signals and NR positioning reference signals.

Exemplarily, FIG. 7 is a schematic diagram of resource mapping of LTE PRS and NR positioning reference signals in the time-frequency domain. Each resource block (resource block, RB) includes 12 consecutive REs in the frequency domain. As shown in Figure 7, the 12 REs are represented as #0 RE to #11 RE, and the resource block RB is called in the time domain. A slot, a subcarrier on the frequency and a symbol on the time domain are called an RE.

As shown in Figure 7, it is assumed that LTE PRS (LTE PRS) occupies #0 and #6 RE of each resource block RB in LTE during data modulation. Consider an NR system deployed on the same frequency as LTE, with the same subcarrier spacing as LTE, for example, 15kHz. The relationship of RE occupied by LTE PRS on the carrier corresponding to NR is as follows:

From the perspective of frequency domain, for RBs with a frequency less than the corresponding frequency of the LTE DC subcarrier, LTE PRS occupies #0 RE and #6 RE of the RB; for the RB with a frequency greater than the corresponding frequency of the LTE DC subcarrier, LTE PRS occupies # of the RB 1 RE and #7 RE. Therefore, in order to ensure that the positioning reference signals of different cells do not collide, the NR cell cannot send NR positioning reference signals on the #0 RE, #1 RE, #6 RE, and #7 RE of each RB. It can only use each RB. Positioning reference signals are sent on 8 resources including #2 RE-#5RE and #8 RE-#11 RE of each RB.

If the NR cell also adopts the same method as the LTE cell, 2 REs of each RB are used to send positioning reference signals, so that only 4 additional NR cells can be supported for frequency division multiplexing with the LTE cell on one resource block.

Exemplarily, if there are three LTE cells in the system, each LTE cell occupies #0 RE and #6 RE, #2 RE and #8 RE, and #4 RE and #10 RE of each RB in LTE. , That is, LTE cells occupying #0 RE and #6 RE of each RB in LTE, and their LTE PRS occupies #0 RE, #1 RE, #6 RE, #7 RE of each RB on the carrier corresponding to NR respectively ; LTE cells occupying #2 RE and #8 RE of each RB in LTE, and their LTE PRS occupies #2 RE, #3 RE, #8 RE, #9 RE of each RB on the carrier corresponding to NR; LTE cells #4RE and #10 occupying each RB in LTE, and their LTE PRS occupies #4 RE, #5 RE, #10 RE, and #11 RE of each RB respectively on the carrier corresponding to NR. That is, the LTE PRSs of the three LTE cells occupy all the REs of each RB on the carrier corresponding to the NR, and can no longer support the frequency division multiplexing of the NR cell with the three LTE cells. In a pure LTE cell or pure NR cell, each pure LTE cell or pure NR cell only occupies 2 REs of each RB, and can support 6 cells of frequency division multiplexing. Therefore, LTE and NR have different mappings to DC components. The rules will cause the number of frequency division multiplexed cells to be reduced when LTE and NR are deployed in the same frequency band to send positioning reference signals.

In summary, in the scenario where the NR cell and the LTE cell are deployed in the same frequency band, the serving cell and neighboring cells of the terminal device may come from the NR cell and the LTE cell respectively. When the NR cell and the LTE cell both need to send positioning reference signals to the terminal device (positioning reference signal, PRS), the two can send NR PRS and LTE PRS respectively through frequency division multiplexing, so that when the terminal device receives the NR PRS configuration information and LTE PRS configuration information sent by the positioning center, the terminal device When determining the frequency domain resource mapping of NR PRS, there is no need to consider the impact of LTE PRS. Therefore, the terminal device can obtain the positioning measurement result after receiving the NR PRS and LTE PRS sent by the NR cell and the LTE cell, and send it to the positioning center, so that the positioning center can locate the terminal device.

However, during frequency domain resource mapping, the mapping rules for baseband DC signals in LTE cells are different from the mapping rules for baseband DC signals in NR cells, resulting in the relative number of frequency division multiplexed cells when NR cells and LTE cells are deployed in the same frequency band. When a pure LTE cell or a pure NR cell is deployed separately, there is a problem of resource waste.

To solve the above-mentioned problem, this application provides a frequency domain resource mapping method of PRS. The terminal device receives the auxiliary information sent by the network device. The auxiliary information includes: PRS configuration information corresponding to the PRS and information about the first frequency point. The auxiliary information is used to indicate the offset information of the PRS on the frequency domain resources. The point is the downlink frequency point of the cell of the first-standard network, and the terminal device determines the resource mapping position in the frequency domain when the PRS is sent and received according to the auxiliary information, and receives the PRS sent by the second-standard network device at the resource mapping position. In this technical solution, the terminal device can determine the resource mapping position after the offset of the positioning reference signal based on the indication of the auxiliary information, which can solve the problem of the reduction of the number of frequency division multiplexed cells when the cells of different standard networks are deployed in the same frequency band to transmit PRS. problem.

Hereinafter, the technical solution of the present application will be described in detail through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

FIG. 8 is a schematic diagram of interaction of Embodiment 1 of a method for mapping frequency domain resources of a PRS provided by an embodiment of this application. The method is explained by the information interaction between the terminal equipment and the network equipment. In this embodiment, the network device may be a wireless access device or a core network device in the communication system shown in FIG. 1 and FIG. 2. Exemplarily, the network device may include: a second-standard network device and a location management function LMF. Referring to FIG. 8, in this embodiment, the method may include the following steps:

Step 81: The network device obtains the information of the first frequency point and the PRS configuration information corresponding to the PRS.

Wherein, the first frequency point is the downlink frequency point of the cell of the first-standard network.

Optionally, in a scenario where cells of different standard networks are deployed in the same frequency band, to realize the positioning of the terminal equipment in the frequency band, the cells of each standard network will send a positioning reference signal PRS to the terminal equipment.

Exemplarily, in this embodiment, the terminal equipment is in the cell of the first-standard network and the cell of the second-standard network for explanation, and the standard of the first-standard network is different from the standard of the second-standard network. The cells of the network do not map resources on the baseband subcarriers, and the cells of the second-standard network can map resources on the baseband subcarriers.

Exemplarily, the system corresponding to the first-standard network may be any of a variety of systems such as LTE system, CDMA system, and WCDMA system, and the system corresponding to the second-standard network may be a new radio (NR) system. It is worth noting that the embodiments of this application do not limit the specific manifestations of the first-standard network and the second-standard network, as long as the cells satisfying the first-standard network do not map resources on the baseband subcarriers and the cells of the second-standard network can be The characteristics of the resources mapped on the baseband subcarriers all belong to the protection category of the embodiments of the present application.

In the embodiment of this application, in order to avoid the problem of reducing the number of cells that can be frequency division multiplexed when cells of different networks are deployed in the same frequency band, the network device may first need to determine the PRS corresponding to the PRS before sending the PRS to the terminal device. Auxiliary information such as configuration information and downlink frequency information of the cell of the first-standard network, so that the network device can determine the frequency resource location in the frequency domain when the PRS is sent and received according to the auxiliary information on the one hand, and on the other hand The auxiliary information is sent to the terminal device, so that the terminal device can also determine the frequency resource location in the frequency domain when the PRS is sent and received, so that the resources in the frequency domain can be reasonably used and resource waste can be reduced.

Optionally, since the network device may include a second-standard network device and a positioning management function LMF, both the second-standard network device and the LMF can obtain PRS configuration information and information about the first frequency point.

Exemplarily, in this embodiment, if the execution subject of this embodiment is a second-standard network device, but the PRS configuration information corresponding to the PRS and the information of the first frequency point are configured by the LMF, the step 81 can be as follows Possible design and realization:

The second-standard network device obtains the PRS configuration information configured by the LMF and the information of the first frequency point.

In this embodiment, when the LMF completes the configuration of the PRS configuration information corresponding to the PRS and the information of the first frequency point, the network device of the second standard can obtain the PRS configuration information configured by the LMF and the information of the first frequency point. Method to obtain the PRS configuration information and the information of the first frequency point. The specific obtaining method may be by sending an obtaining request to the LMF to request the LMF to send it, or receiving the PRS configuration information and the information of the first frequency point automatically synchronized by the LMF.

Exemplarily, in this embodiment, if the executive body of this embodiment is LMF, and the PRS configuration information corresponding to the PRS and the information of the first frequency point are configured by the LMF, the LMF completes the configuration of the PRS configuration information and the first frequency point. After the configuration of the information, the PRS configuration information and the information of the first frequency point can also be sent to the network device of the second standard. In this way, the network device of the second standard can execute the PRS frequency domain resource mapping scheme based on the received PRS configuration information and the information of the first frequency point through interaction with the terminal device.

Exemplarily, in this embodiment, if the executive body of this embodiment is LMF, but the PRS configuration information corresponding to the PRS and the information of the first frequency point are configured by the network device of the second standard, this step 81 can be as follows Possible design and realization:

In this embodiment, when the network device of the second standard completes the configuration of the PRS configuration information corresponding to the PRS and the information of the first frequency point, the LMF can obtain the PRS configuration information configured by the network device of the second standard and the first frequency The PRS configuration information and the information of the first frequency point are obtained by means of point information. The specific acquisition method may be by sending an acquisition request to the second-standard network device to request the second-standard network device to send it, or receiving the PRS configuration information and the first frequency point information automatically synchronized by the second-standard network device.

Exemplarily, if the LMF is used to configure the information of the first frequency point, the LMF is determined in the following manner:

In this embodiment, in the communication system where the terminal device is located, if the sub-carrier interval of the PRS sent by the second-standard network device used for positioning is the same as the sub-carrier interval of the PRS sent by the first-standard network device used for positioning , And the PRS sent by the first-standard network device exists in the bandwidth where the PRS sent by the second-standard network device is located, the downlink frequency point of the cell where the first-standard network device is located is used as the first frequency point, and the first The frequency information is configured to the second-standard network device used for positioning.

Exemplarily, if the second-standard network device used for positioning is used to configure the information of the first frequency point, the second-standard network device is determined in the following manner:

One way is: in this embodiment, the second-standard network device can obtain the first frequency point of the cell of the first-standard network through LMF configuration signaling;

Another way is: the second-standard network device determines to send the positioning reference signal through a preset method, and when the positioning reference signal meets the following conditions, it determines to determine the downlink frequency point of the cell of the first-standard network as the first frequency point, where: The condition is that the subcarrier interval of the PRS sent by the second-standard network device for positioning is the same as the subcarrier interval of the PRS sent by the first-standard network device for positioning, and the PRS sent by the second-standard network device is located The PRS sent by the network device of the first standard exists in the bandwidth of.

It is worth noting 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. Among them, the cells of the first-standard network include LTE base stations (eNB) and next-generation LTE base stations (ng-eNB), and the LMF configures 5G base station (gNB) signaling for NR positioning protocol annex (NR Positioning Protocol Annex, NRPPa) signaling .

Exemplarily, in this embodiment, the embodiment of the information about the first frequency point can be implemented in the following manner:

As an example, the information of the first frequency point is an absolute radio channel number (absolute ratio frequency channel number, ARFCN) of the second-standard network cell corresponding to the frequency of the first frequency point.

Since ARFCN can be used to identify the number of a special radio frequency channel, the ARFCN of the second-standard network cell corresponding to the frequency of the first frequency point can be used as the information of the first frequency point to improve the ability of the terminal equipment to identify the first frequency point. . In this way, multiple second-standard network cells can share a frequency of the first frequency point, which saves signaling overhead.

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

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

The information of the first frequency point is the common resource block (CRB) index corresponding to the frequency of the first frequency point and the RE index in the CRB corresponding to the CRB index, which is located on the downlink carrier of the cell used for positioning ；

or

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

Optionally, for the value determined based on the information of the cell used for positioning, for example, the RE index in the CRB where the DC of the downlink carrier of the gNB used for positioning is located.

or

Among them, the cell A point (ie Point A) is a concept introduced by the second-standard network, and it can be used as a common reference point for all sub-carrier spacing in the cell (for example, RE0 of CRB0).

In the second possible implementation manner of this embodiment, if the information of the first frequency point is applicable to multiple cells used for positioning, and one of the multiple cells used for positioning is the primary serving cell, the first The frequency information is expressed in any of the following forms:

or

The first frequency point information is the 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 primary serving cell, where 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 primary serving cell;

or

The difference between this possible implementation and the above implementation is that the information of the first frequency point can be applied to multiple cells used for positioning, and the multiple cells used for positioning determine a primary serving cell. The information is related to the information of the primary serving cell.

For a detailed description of this manner, please refer to the content record in the above manner, which will not be repeated here.

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

or

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

or

The difference between this possible implementation manner and the foregoing implementation manner is that the information of the first frequency point can be applied to multiple cells used for positioning, and the multiple cells used for positioning include the serving cell of the network device. The frequency information is related to the information of the serving cell.

It is worth noting that, in this embodiment, if the execution subject of this step is a second-standard network device, the information of the first frequency point can be implemented in any one of the above-mentioned first to third possible implementation modes. If the subject of execution of this step is LMF, the information of the first frequency point can be implemented by the first or third possible implementation manner described above.

Step 82: The network device sends auxiliary information to the terminal device. The auxiliary information includes: PRS configuration information and information about the first frequency point. The auxiliary information is used to indicate the offset information of the PRS on the frequency domain resources.

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

As an example, the network device may include the information of the first frequency point in parallel with the PRS configuration information in the auxiliary information and send it to the terminal device, so that the terminal device can obtain the first frequency by parsing the received auxiliary information. Point information and PRS configuration information.

In this embodiment, the network device sends the information of the first frequency point to the terminal device through an explicit configuration method, 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. The processing time of the terminal device is improved, and the frequency domain resource mapping efficiency is improved.

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. The terminal device can only obtain the PRS configuration information by analyzing the received auxiliary information, and then can 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, or other information names, and this application does not limit it. 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 can also be included in the PRS configuration information, and this application does not limit the specific information format or data structure. I won't repeat them below.

Optionally, when the sub-carrier interval corresponding to the positioning reference signal of the cell of the second-standard network is the same as the sub-carrier interval corresponding to the cell of the first-standard network, and the cell of the second-standard network has an auxiliary information reference cell or one or The multiple auxiliary information neighboring cells are cells of the first-standard network, and the frequency 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 network standard , The cell frequency points are exactly 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 standard that is an auxiliary information reference cell, the first frequency point is one of earfcnRef and earfcnRef-v9a0. When earfcnRef and earfcnRef-v9a0 are not configured, the first frequency point is the primary service The center frequency of the cell. Among them, earfcnRef is evolved-universal terrestrial radio access absolute radio frequency channel number reference, and earfcnRef-v9a0 is the v9a0 version of earfcnRef.

For a cell of the first network standard that is an auxiliary information neighbor cell, the first frequency point is one of earfcn and earfcn-v9a0. When earfcn and earfcn-v9a0 are not configured, the first frequency point is the center of the auxiliary information reference cell Frequency. Among them, earfcn is the evolved-universal terrestrial radio access absolute radio frequency channel number (EARFCN), and earfcn-v9a0 is the v9a0 version of earfcn.

In the implicit configuration mode, including the information of the first frequency point in the PRS configuration information refers to determining the information of the first frequency point through the PRS configuration information. For example, through the configuration information of LTE PRS, the information of the first frequency point can be determined.

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

Optionally, in this embodiment, the aforementioned auxiliary information may also include the frequency offset of the PRS. The frequency offset of the PRS may be used to indicate that the PRS is mapped to the frequency domain on the right side of the first frequency point. The number of subcarriers that need to be offset.

In this embodiment, the network device may include the frequency offset of the PRS, the information of the first frequency point, and the PRS configuration information in parallel and send it to the terminal device in the auxiliary information, or it may include the frequency offset of the PRS. In the information of the first frequency point or included in the PRS configuration information and sent to the terminal device, the frequency offset of the PRS can also be included in the information of the first frequency point and the information of the first frequency point is included in the PRS configuration information Send to the terminal device in the form. The embodiment of the present application does not limit the form in which the network device sends the frequency offset, which can be determined according to the situation.

It is worth noting that under normal circumstances, the network device does not send the frequency offset to the terminal device. When the network device does not send the frequency offset, the terminal device directly according to the subcarrier occupied by the first frequency point on the frequency domain resource Number, offset the RE corresponding to the number of subcarriers. Generally, the first frequency point occupies 1 subcarrier on the frequency domain resource (in the time-frequency domain, it is an RE), then when the PRS is mapped to the frequency domain, the frequency is less than the corresponding subcarrier of the first frequency point. Frequency, the number of REs occupied by the PRS in each RB remains unchanged. For frequencies greater than the corresponding subcarrier of the first frequency point, the number of REs occupied by the PRS in each RB is increased by 1, or for frequencies less than this The first frequency point corresponds to the frequency of the subcarrier. The number of REs occupied by the PRS in each RB is reduced by 1. For frequencies greater than the corresponding subcarrier of the first frequency point, the number of REs occupied by the PRS in each RB is not change. When the network device does not send the frequency offset to the terminal device, the frequency offset may also be predefined by the protocol.

Optionally, in this embodiment, if the executor of this step is the LMF, the LMF may send the aforementioned auxiliary information to the terminal device through LTE positioning protocol (LTE positioning protocol, LPP) signaling.

In this embodiment, when the execution subject of this step is LMF, the method can be implemented by using the communication system shown in FIG. 2 above.

Optionally, in this embodiment, if the executor of this step is a second-standard network device, the second-standard network device may send the above auxiliary information through radio resource control (RRC) protocol signaling To the terminal equipment.

In this embodiment, when the execution subject of this step is a second-standard network device, the method can be implemented using the communication system shown in FIG. 1 above.

It should be understood that, the above-mentioned information of the first frequency point may be one or more. For both the explicit and/or implicit configuration methods, information of multiple first frequency points can be indicated. For example, when the frequency of NR includes multiple LTE cell frequencies, or when multiple networks with different first standards are included, information on multiple first frequency points may be configured.

Step 83: The terminal device determines the resource mapping position in the frequency domain when the PRS is sent and received according to the received auxiliary information.

Optionally, in this embodiment, the terminal device may receive auxiliary information sent by the network device. Exemplarily, the terminal device may receive the foregoing auxiliary information sent by the LMF through LPP signaling, or receive the foregoing auxiliary information sent by the second-standard network device through RRC protocol signaling.

Exemplarily, after the terminal device receives the auxiliary information, it can obtain the PRS configuration information, the information of the first frequency point, and the frequency offset of the PRS (optional) by analyzing the auxiliary information, and then based on the obtained auxiliary information. The PRS configuration information, the information of the first frequency point, and the frequency offset of the PRS (optional) determine the resource mapping position in the frequency domain when the PRS is transmitted and received.

Optionally, after receiving the aforementioned 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 has received the auxiliary information sent by the network device.

Correspondingly, the network device will receive the first response message sent by the terminal device, thereby determining the aforementioned auxiliary information received by the terminal device.

For the specific implementation principle and beneficial effects of this step 83, reference may be made to the description in the embodiment shown in FIG. 9 below, which will not be repeated here.

Step 84: The terminal device receives the PRS sent by the network device of the second standard at the resource mapping location.

In this embodiment, when the second-standard network device determines the auxiliary information including the PRS configuration information, the information of the first frequency point, and the frequency offset of the PRS (optional), it can be determined based on the auxiliary information The resource mapping position in the frequency domain when the PRS is sent and received is output, and the PRS can be sent to the terminal device at the resource mapping position.

Correspondingly, it can be known from step 83 that after receiving the auxiliary information, the terminal device will determine the resource mapping position in the frequency domain when the PRS is transmitted and received 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 location.

Optionally, in this embodiment, after receiving the PRS sent by the second-standard network device, the terminal device may also send a second response message to the second-standard network device, and the second response message may be used to instruct the terminal The device receives the auxiliary information sent by the second-standard network device.

Correspondingly, the second-standard network device will receive the second response message sent by the terminal device, and then determine according to the second response message that the terminal device has received the PRS sent by it.

Exemplarily, the specific implementation principle and beneficial effects of this step 84 may be introduced based on the record in the embodiment shown in FIG. 9 below, and will not be repeated here.

In the method for mapping frequency domain resources of the PRS provided by the embodiment of the present application, the network device obtains the information of the first frequency point and the PRS configuration information corresponding to the PRS. The first frequency point is the downlink frequency point of the cell of the first-standard network, and the terminal The device sends auxiliary information, the auxiliary information includes: PRS configuration information and information about the first frequency point, the auxiliary information is used to indicate the offset information of the PRS on the frequency domain resources, and the terminal device may determine based on the received auxiliary information The resource mapping position in the frequency domain during PRS transmission and reception, and the PRS sent by the second-standard network device is received at the resource mapping position. In this technical solution, the terminal device can accurately determine the resource mapping position after the offset of the positioning reference signal based on the received auxiliary information, which solves the problem of the frequency division multiplexing cell when the cells of different standard networks are deployed in the same frequency band to transmit PRS. The number reduction problem avoids waste of resources.

Exemplarily, on the basis of the foregoing embodiment, FIG. 9 is a schematic flowchart of Embodiment 2 of a PRS frequency domain resource mapping method provided by an embodiment of this application. In practical applications, terminal equipment and network equipment can execute the technical solutions of this method respectively. Exemplarily, since this embodiment is a further description of the foregoing step 83, this embodiment takes the terminal device as the execution subject for explanation. As shown in FIG. 9, the above step 83 can be implemented through the following steps:

Step 91: Determine the 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 the mapping resource location of the first frequency point in the frequency domain.

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

Exemplarily, the terminal device and the second-standard network device used 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, both the terminal device and the second-standard network device used for positioning can determine the target resource index corresponding to the first frequency point based on the frequency of the second frequency point, that is, the mapping of the first frequency point in the frequency domain Resource location. Wherein, the second frequency point is point A of the cell where the second-standard network device is located.

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

It can be expressed by the following formula:

The frequency of the first frequency point can be directly obtained from the first frequency point, and the frequency of the second frequency point is the frequency of point A of the downlink carrier of the cell used for positioning. For a certain cell of the second-standard network, the frequency of this point A is certain.

Exemplarily, if the PRS subcarrier interval of the cell used for positioning is 15 kHz and the first frequency point is included in the PRS bandwidth of the cell used for positioning, the terminal device can then determine the frequency of the first frequency point. , The frequency of the second frequency point and 15kHz are brought into the above formula to obtain the target resource index corresponding to the first frequency point.

Step 92: Determine the first resource index set corresponding to the PRS according to the PRS configuration information in the aforementioned auxiliary information.

Wherein, the first resource index set includes: the CRB index occupied by the PRS and the resource RE index in each CRB.

Optionally, in this embodiment, the terminal device and the second-standard network device used for positioning may determine the first resource index set Q ₁ corresponding to the PRS based on the determined PRS configuration information.

Specifically, the terminal device and the second-standard network device used for positioning first determine based on the PRS configuration information that the CRB index set occupied by the PRS of the second-standard network device is

The

Indicates that the PRS occupies a total of N CRBs,

Represents the i-th CRB occupied by the PRS in the PRS bandwidth of the cell used for positioning; secondly, based on the PRS configuration information, it is determined that the RE index set in each CRB occupied by the PRS is

The

It means that each CRB occupies a total of K REs,

Indicates the i-th RE occupied by the PRS in each CRB. Finally, according to the CRB index set A and the RE index set B in each CRB, the first resource index set Q ₁ corresponding to the PRS can be obtained, that is, the first resource index set Q ₁ can be expressed by the following formula:

Step 93: According to the target resource index and the first resource index set, determine the second resource index set after the PRS is offset on the frequency domain resource.

Wherein, the second resource index set is used to indicate the resource mapping position in the frequency domain during PRS transmission and reception.

Optionally, in this embodiment, when the auxiliary information further includes the frequency offset of the PRS, the terminal device also needs to obtain 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.

Correspondingly, in this embodiment, the terminal device and the second-standard network device used for positioning may determine the second resource index set Q ₁ and the frequency offset of the PRS in any one of the following ways based on the above determined frequency offset. Resource index set Q ₂ .

Exemplarily, the second resource index set Q ₂ may be implemented in any one of four possible implementation manners.

Among them, the first possible implementation is as follows:

The second possible implementation is as follows:

The third possible implementation is as follows:

And

The fourth possible implementation is as follows:

And

Among them, Q ₂ represents the second resource index set, Q ₁ represents the first resource index set, k represents the resource index in Q ₂ and k ₁ is the resource index in Q ₁ ,

Index for the target resource,

Is the number of REs in a resource block RB,

with

Exemplarily, FIG. 10A is a schematic diagram of resource distribution of the first resource index set and the second resource index set through the 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 through 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 through a fourth possible implementation manner. Generally, the frequency offset of the PRS is 1, that is, the above-mentioned FIGS. 10A to 10D are all described with the frequency offset of the PRS being 1.

As shown in FIG. 10A, the second-standard network equipment and terminal equipment used for positioning can determine the resource mapping position during PRS transmission and reception in the entire frequency domain according to the first possible implementation manner. At this time, for the resource index in Q ₂ that is smaller than the target resource index, the network device of the second standard may send the PRS on the first resource index set corresponding to the PRS, and correspondingly, the terminal device may also send the PRS on the first resource index set corresponding to the PRS Receive the PRS sent by the network device of the second standard; for the resource index in Q ₂ that is greater than or equal to the target resource index, the network device of the second standard needs to shift the frequency of the above PRS to the right on the basis of the first resource index set corresponding to the PRS The PRS is sent on the resource after the offset (n), and correspondingly, the terminal device also needs to shift to the right on the resource after the frequency offset (n) of the above PRS on the basis of the first resource index set corresponding to the PRS. The PRS sent by the second-standard network device.

As shown in FIG. 10B, the second-standard network equipment and terminal equipment used for positioning can determine the resource mapping position during PRS transmission and reception in the entire frequency domain according to the second possible implementation manner. At this time, for the resource index in Q ₂ that is less than or equal to the target resource index, the network device of the second standard needs to shift the frequency offset (n) of the above PRS to the left based on the first resource index set corresponding to the PRS The PRS is sent on the resource. Accordingly, the terminal device also needs to receive the PRS sent by the network device of the second standard on the resource after the frequency offset (n) of the above-mentioned PRS on the basis of the first resource index set corresponding to the PRS. ; For the resource index in Q ₂ that is greater than the target resource index, the second-standard network device can send the PRS on the first resource index set corresponding to the PRS, and accordingly, the terminal device can also receive it on the first resource index set corresponding to the PRS The PRS sent by the second-standard network device.

As shown in FIG. 10C, the second-standard network equipment and terminal equipment used for positioning can determine the resource mapping position during PRS transmission and reception in the entire frequency domain according to the third possible implementation manner. The difference between this method and the possible implementation shown in FIG. 10A is that the solution adds overflow protection, that is, the largest CRB index of the bandwidth occupied by the PRS in the first resource index set Q ₁ is determined.

The maximum resource index _{kmax in} , so as to ensure that the PRS only falls on the CRB given by the PRS configuration information.

As shown in FIG. 10D, the second-standard network equipment and terminal equipment used for positioning can determine the resource mapping position during PRS transmission and reception in the entire frequency domain according to the fourth possible implementation manner. The difference between this method and the possible implementation shown in FIG. 10B is that the solution adds underflow protection, that is, the smallest CRB index of the bandwidth occupied by the PRS in the first resource index set Q ₁ is determined.

The minimum resource index in is k _min to ensure that the PRS only falls on the CRB given by the PRS configuration information.

Through the above analysis, in the present embodiment, the positioning device for the second standard network resource mapping may be set corresponding to the position Q ₂ PRS transmits to the terminal device in the second resource index. Wherein, each element k in Q ₂ after the PRS is offset on the frequency domain resource is an RE index relative to the above-mentioned second frequency point, and the second-standard network device can obtain the RE index by the following formula according to the RE index CRB index n ^CRB where RE index is located and RE index k ^{CRB in CRB} :

Correspondingly, the terminal device can receive the PRS sent by the terminal device at the resource mapping position corresponding to the second resource index set Q ₂ above, and the terminal device can also receive each of Q ₂ shifted from the frequency domain resource according to the PRS. The element k determines the CRB index n ^CRB where the RE index corresponding to the element is located and the RE index k ^{CRB in the CRB} .

According to the method for mapping frequency domain resources of the PRS provided by the embodiment of the present application, the target resource index corresponding to the first frequency point is determined according to the information of the first frequency point in the auxiliary information, and the target resource index is used to indicate that the first frequency point is The mapping resource location in the frequency domain determines the first resource index set corresponding to the PRS according to the PRS configuration information in the auxiliary information, and the first resource index set includes: the CRB index occupied by the PRS and the RE index in each CRB, Finally, according to the target resource index and the first resource index set, a second resource index set after the PRS is offset on the frequency domain resource is determined, and the second resource index set is used to indicate the resource mapping position in the frequency domain when the PRS is transmitted and received . In this technical solution, the second-standard network equipment and terminal equipment used for positioning can both accurately determine the second resource index set after the PRS is offset on the frequency domain resources according to the determined first frequency point information and PRS configuration information. It lays the foundation for the subsequent transmission and reception of PRS at a certain location, thereby avoiding the reduction in the number of frequency division multiplexed cells.

FIG. 11 is a schematic structural diagram of Embodiment 1 of a device for mapping frequency domain resources of a PRS according to an embodiment of this application. The device can be integrated in the terminal device, and can also be implemented by the terminal device. As shown in FIG. 11, the device may include: a transceiver module 111 and a processing module 112.

Wherein, the transceiver module 111 is configured to receive auxiliary information sent by a network device. The auxiliary information includes: PRS configuration information corresponding to the positioning reference signal PRS and first frequency point information, and the auxiliary information is used to indicate the PRS Offset information on frequency domain resources, where 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, the resource mapping position in the frequency domain when the PRS is transmitted and received;

The transceiver module 111 is further configured to receive the PRS sent by the network device of the second standard at the resource mapping location 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.

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

In any of the foregoing possible designs of the embodiments of the present application, the processing module 112 is specifically configured to determine the target resource index corresponding to the first frequency point according to the information of the first frequency point in the auxiliary information, The target resource index is used to indicate the mapping resource position of the first frequency point in the frequency domain, and the first resource index set corresponding to the PRS is determined according to the PRS configuration information in the auxiliary information. A resource index set includes: the common resource block CRB index occupied by the PRS and the resource element RE index in each CRB, and according to the target resource index and the first resource index set, it is determined that the PRS is in the frequency domain A second resource index set offset on the resource, where the second resource index set is used to indicate a resource mapping position in the frequency domain when the PRS is received and received.

or

And

or

And

Index for the target resource,

Is the number of REs in a resource block RB,

with

Exemplarily, the network device includes: a second-standard network device and a location management function LMF.

In yet another possible design of this embodiment, the information of the first frequency point is the absolute wireless channel number ARFCN of the second-standard network cell 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 used for positioning, or the information of the first frequency point is applicable to one cell used for positioning.

Exemplarily, when the information of the first frequency point is applicable to a cell used for positioning, the information of the first frequency point is expressed in any of the following forms:

or

Exemplarily, if the information of the first frequency point is applicable to multiple cells used for positioning, and one of the multiple cells used for positioning is the primary serving cell, the information of the first frequency point adopts any one of the following A form of representation:

or

Exemplarily, if the information of the first frequency point is applicable to multiple cells used for positioning, and the multiple cells used for positioning include the serving cell of the network device, the information of the first frequency point adopts any of the following forms Means:

or

The device in this embodiment can also be used to implement the implementation solutions of the terminal equipment in the method embodiments shown in FIG. 8 and FIG.

FIG. 12 is a schematic structural diagram of Embodiment 2 of a PRS frequency domain resource mapping apparatus provided by an embodiment of the application. The device can be integrated in the network equipment or realized through the network equipment. As shown in FIG. 12, the device may include: an acquisition module 121 and a transceiver module 122.

Wherein, the obtaining module 121 is configured to obtain 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 a terminal device, the auxiliary information includes: the PRS configuration information and information about the first frequency point, and the auxiliary information is used to indicate that the PRS is on frequency domain resources Offset information.

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 has received the auxiliary information.

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

Exemplarily, 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.

Exemplarily, as shown in FIG. 12, the device further includes: a processing module 123.

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

The transceiver module 122 is further configured to send the PRS to the terminal device at the resource mapping location 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 has received 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, and the target resource index is used to indicate the The mapping resource position of the first frequency point in the frequency domain is determined according to the PRS configuration information in the auxiliary information, and the first resource index set corresponding to the PRS is determined, and the first resource index set includes: the PRS occupation The common resource block CRB index and the resource element RE index in each CRB, and the second resource index after the PRS offset on the frequency domain resource is determined according to the target resource index and the first resource index set Set, the second resource index set is used to indicate the resource mapping position in the frequency domain when the PRS is transmitted and received.

or

And

or

And

Index for the target resource,

Is the number of REs in a resource block RB,

with

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

As an example, when the apparatus is applied to the network equipment 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 second-standard network device.

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 second-standard network device 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 the absolute wireless channel number ARFCN of the second-standard network cell 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 multiple cells used for positioning, or the information of the first frequency point is applicable to one cell used for positioning.

or

The device in this embodiment can be used to implement the implementation scheme of the network device in the method embodiment shown in FIG. 8 and FIG. 9. The specific implementation manner and technical effect are similar, and details are not described herein again.

It should be noted that it should be understood that the division of the various modules of the above device is only a division of logical functions, and may be fully or partially integrated into a physical entity in actual implementation, or may be physically separated. And these modules can all be implemented in the form of software called by processing elements; they can also be implemented in the form of hardware; some modules can be implemented in the form of calling software by processing elements, and some of the modules can be implemented in the form of hardware.

For example, the processing module may be a separately established processing element, or it may be integrated in a chip of the above-mentioned device for implementation. In addition, it may also be stored in the memory of the above-mentioned device in the form of program code, and a certain processing element of the above-mentioned device Call and execute the functions of the above processing module. The implementation of other modules is similar.

In addition, all or part of these modules can be integrated together or implemented independently. The processing element described here may be an integrated circuit with signal processing capability. In the implementation process, each step of the above method or each of the above modules can be completed by hardware integrated logic circuits in the processor element or instructions 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 circuit (ASIC), or one or more microprocessors (digital signal processor, DSP), or, one or more field programmable gate arrays (FPGA), etc. For another example, when one of the above modules is implemented in the form of processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call program codes. For another example, these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. 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 a website, computer, server, or data center through a wired ( For example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means to transmit to another website, computer, server or data center. The readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

FIG. 13 is a schematic structural diagram of Embodiment 3 of a device for mapping frequency domain resources of a PRS provided by an embodiment of the application. The device can be integrated in the terminal device, and can also be implemented by the terminal device.

In terms of hardware implementation, the aforementioned transceiver module 111 may be a transmitter and receiver, and the transceiver constitutes a communication interface.

As shown in FIG. 13, the device may include: a processor 131, a memory 132, a communication interface 133, and a system bus 134. The memory 132 and the communication interface 133 are connected to the processor 131 through the system bus 134 and To complete the communication between each other, the memory 132 is used to store computer-executed instructions, the communication interface 133 is used to communicate with other devices, and the processor 131 executes the computer-executed instructions as shown in Figures 8 and 9 The implementation scheme of terminal equipment in the method embodiment is shown.

FIG. 14 is a schematic structural diagram of Embodiment 4 of a device for mapping frequency domain resources of a PRS provided by an embodiment of this application. The device can be integrated in the network equipment or realized through the network equipment.

In terms of hardware implementation, the aforementioned transceiver module 122 may be a transmitter and receiver, and the transceiver constitutes a communication interface.

As shown in FIG. 14, the device may include: a processor 141, a memory 142, a communication interface 143, and a system bus 144. The memory 142 and the communication interface 143 are connected to the processor 141 through the system bus 144 and To complete mutual communication, the memory 142 is used to store computer-executed instructions, the communication interface 143 is used to communicate with other devices, and the processor 141 executes the computer-executed instructions as shown in FIGS. 8 and 9 The implementation scheme of the network equipment in the method embodiment is shown.

The system bus mentioned in FIG. 13 or FIG. 14 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The system bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus. The communication interface is used to realize the communication between the database access device and other devices (such as client, read-write library and read-only library). The memory may include random access memory (RAM), and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

The above-mentioned processor can be a general-purpose processor, including a central processing unit CPU, a network processor (NP), etc.; it can also be a digital signal processor DSP, an application specific integrated circuit ASIC, a field programmable gate array FPGA or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.

Optionally, an embodiment of the present application provides a storage medium that stores instructions in the storage medium, and when the instructions are run on a computer, the computer executes the terminal in the method embodiment shown in FIG. 8 and FIG. The realization scheme of the equipment.

Optionally, the embodiment of the present application further provides a storage medium, which stores instructions in the storage medium, which when run on a computer, causes the computer to execute the network device in the method embodiment shown in FIGS. 8 and 9 above. The realization scheme.

Optionally, the aforementioned processor 131 and memory 132 may also be integrated in an application specific integrated circuit, and the integrated circuit may further include a communication interface 133. The application specific integrated circuit can be a processing chip or a processing circuit. The communication interface 133 may be a communication interface including wireless transmission and reception, or an interface for digital signals input after processing the received wireless signals by other processing circuits, and may also be a software or hardware interface for communicating with other modules. The memory stores code and data, and the memory is coupled with the processor, and the processor runs the code in the memory to make the chip execute the implementation scheme of the terminal device in the method embodiment shown in FIG. 8 and FIG. 9.

Optionally, the aforementioned processor 141 and memory 142 may also be integrated in an application specific integrated circuit, and the integrated circuit may further include a communication interface 143. The application specific integrated circuit can be a processing chip or a processing circuit. The communication interface 143 may be a communication interface including wireless transceiving, or a digital signal input after processing the received wireless signal through other processing circuits, or a software or hardware interface for communicating with other modules. The memory stores code and data, the memory is coupled with the processor, and the processor runs the code in the memory to make the chip execute the implementation scheme of the network device in the method embodiment shown in FIG. 8 and FIG. 9.

An embodiment of the present application further provides a program product, the program product includes a computer program, the computer program is stored in a storage medium, at least one processor can read the computer program from the storage medium, and the at least one When the processor executes the computer program, the implementation scheme of the terminal device in the method embodiment shown in FIG. 8 and FIG. 9 can be realized.

An embodiment of the present application further provides a program product, the program product includes a computer program, the computer program is stored in a storage medium, at least one processor can read the computer program from the storage medium, and the at least one When the processor executes the computer program, the implementation scheme of the network device in the method embodiment shown in FIG. 8 and FIG. 9 can be realized.

FIG. 15 is a schematic structural diagram of an embodiment of a communication system provided by an embodiment of this application. As shown in FIG. 15, the communication system may include: a terminal device 151, a second-standard network device 152, an LMF 153, and a first-standard network device 154. The second-standard network device 152, the LMF 153, and the first-standard network device 154 can all communicate with the terminal device 151 wirelessly, and the second-standard network device 152 and the first-standard network device 154 can also communicate with the LMF 153 wirelessly.

The terminal device 151 may be the frequency domain resource mapping device of the PRS in the embodiment shown in FIG. 11 or FIG. 13; the second-standard network device 152 and the LMF 153 may be the device in the embodiment shown in FIG. 12 or FIG. PRS frequency domain resource mapping device.

Exemplarily, in this embodiment, the terminal device 151 may receive the auxiliary information sent by the second-standard network device 152 and the LMF 153, and determine the auxiliary information based on the PRS configuration information corresponding to the PRS in the auxiliary information and the information of the first frequency point. The resource mapping position in the frequency domain during PRS transmission and reception; the second-standard network device 152 and LMF 153 can obtain the information of the first frequency point and the PRS configuration information corresponding to the PRS, and send the PRS configuration information corresponding to the PRS to the terminal device And the auxiliary information of the first frequency point.

In this embodiment, for the specific implementation manners of the terminal device 151, the second-standard network device 152, and the LMF 153, refer to the record in the foregoing embodiment, which will not be repeated here.

In this application, "at least one" refers to one or more, and "multiple" refers to two or more. "And/or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, both A and B exist, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects before and after are in an "or" relationship; in the formula, the character "/" indicates that the associated objects before and after are in a "division" relationship. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a). For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple One.

It can be understood that the various numerical numbers involved in the embodiments of the present application are only for easy distinction for description, and are not used to limit the scope of the embodiments of the present application.

It can be understood that, in the embodiments of the present application, the size of the sequence numbers of the foregoing processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not be implemented in this application. The implementation process of the example constitutes any limitation.

Claims

A frequency domain resource mapping method for positioning reference signal PRS is suitable for terminal equipment, and is characterized in that it includes:

Receive auxiliary information sent by a network device, where the auxiliary information includes: PRS configuration information corresponding to the positioning reference signal PRS and information about the first frequency point, and the auxiliary information is used to indicate the offset information of the PRS on the frequency domain resource , The first frequency point is a downlink frequency point of a cell of the first-standard network;

Determine, according to the auxiliary information, the resource mapping position in the frequency domain when the PRS is transmitted and received;

Receiving the PRS sent by the second-standard network device at the resource mapping location.
The method according to claim 1, wherein the auxiliary information further comprises: a frequency offset of the PRS.
The method according to claim 1 or 2, wherein the information of the first frequency point is included in the PRS configuration information.
The method according to any one of claims 1 to 3, wherein the determining, according to the auxiliary information, the resource mapping position in the frequency domain when the PRS is transmitted and received, comprises:

Determine the 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 the mapping resource position of the first frequency point in the frequency domain ；

According to the PRS configuration information in the auxiliary information, a first resource index set corresponding to the PRS is determined, the first resource index set including: the common resource block CRB index occupied by the PRS and the resources in each CRB Element RE index;

According to the target resource index and the first resource index set, a second resource index set after the PRS is offset on the frequency domain resource is determined, and the second resource index set is used to indicate when the PRS is receiving and transmitting The resource mapping position in the frequency domain.
The method according to claim 4, wherein the second resource index set is any one of the following implementation modes:

or

or

or

Wherein, Q 2 represents the second resource index set, Q 1 represents the first resource index set, k represents the resource index in Q 2 and k 1 is the resource index in Q 1 ,
Index for the target resource,

Is the number of REs in a resource block RB,
with
Are the smallest CRB index and the largest CRB index of the bandwidth occupied by the PRS,
Represents the set of CRB indexes occupied by the PRS, and n is the frequency offset of the PRS.
The method according to any one of claims 1-5, wherein the network device comprises: a second-standard network device and a location management function LMF.
The method according to any one of claims 1 to 6, wherein the information of the first frequency point is the absolute wireless channel number ARFCN of the second-standard network cell corresponding to the frequency of the first frequency point.
The method according to any one of claims 1-6, wherein the information of the first frequency point is applicable to multiple cells used for positioning, or the information of the first frequency point is applicable to one user For the location of the cell.
The method according to claim 8, wherein when the information of the first frequency point is applicable to a cell used for positioning, the information of the first frequency point is expressed in any of the following forms:

The information of the first frequency point is the common resource block CRB index corresponding to the frequency of the first frequency point and the RE index in the CRB corresponding to the CRB index, and the CRB is located on the downlink carrier of the cell used for positioning on;

or

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

or

The information of the first frequency point is the resource index of the frequency of the first frequency point relative to the second frequency point, and the second frequency point is the point A of the cell used for positioning.
A frequency domain resource mapping method for positioning reference signal PRS is suitable for network equipment, and is characterized in that it includes:

Acquiring information about 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 the first-standard network;

The auxiliary information is sent to the terminal device, the auxiliary information includes: the PRS configuration information and the information of the first frequency point, and the auxiliary information is used to indicate the offset information of the PRS on the frequency domain resource.
The method according to claim 10, wherein the auxiliary information further comprises: a frequency offset of the PRS.
The method according to claim 10 or 11, wherein the information of the first frequency point is included in the PRS configuration information.
The method according to any one of claims 10-12, wherein the method further comprises:

Determine, according to the auxiliary information, the resource mapping position in the frequency domain when the PRS is transmitted and received;

Sending the PRS to the terminal device at the resource mapping position.
The method according to claim 13, wherein the determining, according to the auxiliary information, the resource mapping position in the frequency domain when the PRS is transmitted and received, comprises:

Determine the 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 the mapping resource position of the first frequency point in the frequency domain ；

According to the PRS configuration information in the auxiliary information, a first resource index set corresponding to the PRS is determined, the first resource index set including: the common resource block CRB index occupied by the PRS and the resources in each CRB Element RE index;

According to the target resource index and the first resource index set, a second resource index set after the PRS is offset on the frequency domain resource is determined, and the second resource index set is used to indicate when the PRS is receiving and transmitting The resource mapping position in the frequency domain.
The method according to claim 14, wherein the second resource index set is any one of the following implementation modes:

or

or

or

Wherein, Q 2 represents the second resource index set, Q 1 represents the first resource index set, k represents the resource index in Q 2 and k 1 is the resource index in Q 1 ,
Index for the target resource,

Is the number of REs in a resource block RB,
with
Are the smallest CRB index and the largest CRB index of the bandwidth occupied by the PRS,
Represents the set of CRB indexes occupied by the PRS, and n is the frequency offset of the PRS.
The method according to any one of claims 10-15, wherein the network device comprises: a second-standard network device and a location management function LMF.
The method according to claim 16, wherein the obtaining the information of the first frequency point and the PRS configuration information corresponding to the positioning reference signal PRS comprises:

The second-standard network device acquires the PRS configuration information configured by the LMF and the information of the first frequency point.
The method of claim 16, wherein the method further comprises:

The LMF sends the PRS configuration information and the information of the first frequency point to the second-standard network device.
The method according to claim 16, wherein the obtaining the information of the first frequency point and the PRS configuration information corresponding to the positioning reference signal PRS comprises:

The LMF obtains the PRS configuration information configured by the second-standard network device and the information of the first frequency point.
The method according to any one of claims 10-19, wherein the information of the first frequency point is the absolute wireless channel number ARFCN of the second-standard network cell corresponding to the frequency of the first frequency point.
A PRS frequency domain resource mapping device, which is characterized in that it comprises: a transceiver module and a processing module;

The transceiver module is configured to receive auxiliary information sent by a network device, the auxiliary information includes: PRS configuration information corresponding to the positioning reference signal PRS and information about the first frequency point, and the auxiliary information is used to indicate that the PRS is in frequency Offset information on domain resources, where 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, the resource mapping position in the frequency domain when the PRS is transmitted and received;

The transceiver module is further configured to receive the PRS sent by the network device of the second standard at the resource mapping location determined by the processing module.
The apparatus according to claim 21, wherein the auxiliary information further comprises: a frequency offset of the PRS.
The device according to claim 21 or 22, wherein the information of the first frequency point is included in the PRS configuration information.
The apparatus according to any one of claims 21-23, wherein the processing module is specifically configured to determine the corresponding information of the first frequency point according to the information of the first frequency point in the auxiliary information The target resource index, the target resource index is used to indicate the mapping resource position of the first frequency point in the frequency domain, and the first resource index set corresponding to the PRS is determined according to the PRS configuration information in the auxiliary information 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, and the target resource index and the first resource index set are used to determine the A second resource index set after the PRS is offset on the frequency domain resource, where the second resource index set is used to indicate the resource mapping position in the frequency domain when the PRS is received and received.
The device according to claim 24, wherein the second resource index set is any one of the following implementation modes:

or

or

or

Wherein, Q 2 represents the second resource index set, Q 1 represents the first resource index set, k represents the resource index in Q 2 and k 1 is the resource index in Q 1 ,
Index for the target resource,

Is the number of REs in a resource block RB,
with
Are the smallest CRB index and the largest CRB index of the bandwidth occupied by the PRS,
Represents the set of CRB indexes occupied by the PRS, and n is the frequency offset of the PRS.
The apparatus according to any one of claims 21-25, wherein the network device comprises: a second-standard network device and a location management function LMF.
The apparatus according to any one of claims 21-26, wherein the information of the first frequency point is the absolute wireless channel number ARFCN of the second-standard network cell corresponding to the frequency of the first frequency point.
The device according to any one of claims 21-26, wherein 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 For the location of the cell.
The apparatus according to claim 28, wherein when the information of the first frequency point is applicable to a cell used for positioning, the information of the first frequency point is expressed in any of the following forms:

The information of the first frequency point is the common resource block CRB index corresponding to the frequency of the first frequency point and the RE index in the CRB corresponding to the CRB index, and the CRB is located on the downlink carrier of the cell used for positioning on;

or

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

or

The information of the first frequency point is the resource index of the frequency of the first frequency point relative to the second frequency point, and the second frequency point is the point A of the cell used for positioning.
A frequency domain resource mapping device for PRS, which is characterized by comprising: an acquisition module and a transceiver module;

The acquiring module 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 is configured to send auxiliary information to a terminal device, the auxiliary information includes: the PRS configuration information and information about the first frequency point, and the auxiliary information is used to indicate that the PRS is on frequency domain resources Offset information.
The apparatus according to claim 30, wherein the auxiliary information further comprises: a frequency offset of the PRS.
The device according to claim 30 or 31, wherein the information of the first frequency point is included in the PRS configuration information.
The device according to any one of claims 30-32, wherein the device further comprises: a processing module;

The processing module is configured to determine, according to the auxiliary information, the resource mapping position in the 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 location determined by the processing module.
The device according to claim 33, wherein the processing module is specifically configured to determine the target resource index corresponding to the first frequency point according to the information of the first frequency point in the auxiliary information, and The target resource index is used to indicate the mapping resource position of the first frequency point in the frequency domain, and the first resource index set corresponding to the PRS is determined according to the PRS configuration information in the auxiliary information. The resource index set includes: the common resource block CRB index occupied by the PRS and the resource element RE index in each CRB, and according to the target resource index and the first resource index set, it is determined that the PRS is in the frequency domain. A second resource index set after the upper offset, where the second resource index set is used to indicate the resource mapping position in the frequency domain when the PRS is transmitted and received.
The device according to claim 34, wherein the second resource index set is any one of the following implementation modes:

or

or

or

Wherein, Q 2 represents the second resource index set, Q 1 represents the first resource index set, k represents the resource index in Q 2 and k 1 is the resource index in Q 1 ,
Index for the target resource,

Is the number of REs in a resource block RB,
with
Are the smallest CRB index and the largest CRB index of the bandwidth occupied by the PRS,
Represents the set of CRB indexes occupied by the PRS, and n is the frequency offset of the PRS.
The device according to any one of claims 30-35, wherein the device is applied to a second-standard network device and a location management function LMF.
The apparatus according to claim 36, wherein when the apparatus is applied to the network equipment of the second standard, the obtaining module is specifically configured to obtain the PRS configuration information and the first configuration information of the LMF configuration. One frequency point of information.
The device according to claim 36, wherein when the device is applied to the LMF, the transceiver module is further configured to send the PRS configuration information and the first network device to the second-standard network device. Frequency information.
The apparatus according to claim 36, wherein when the apparatus is applied to the LMF, the obtaining module is specifically configured to obtain PRS configuration information configured by the second-standard network device and the first frequency Point of information.
The apparatus according to any one of claims 30-39, wherein the information of the first frequency point is the absolute wireless channel number ARFCN of the second-standard network cell corresponding to the frequency of the first frequency point.
A PRS frequency domain resource mapping device, including a processor, a memory, and a computer program that is stored on the memory and can be run on the processor, wherein the processor executes the program to implement the above-mentioned rights The method described in any one of 1-9 is required; or

When the processor executes the program, the method according to any one of claims 10-20 is implemented.
A storage medium, characterized in that instructions are stored in the storage medium, and when the instructions are run on a computer, the computer executes the method according to any one of claims 1-9; or

When the instructions are executed on the computer, the computer is caused to execute the method according to any one of claims 10-20.