WO2021056588A1

WO2021056588A1 - Method and device for configuration precoding

Info

Publication number: WO2021056588A1
Application number: PCT/CN2019/109241
Authority: WO
Inventors: 黄甦
Original assignee: 华为技术有限公司
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2021-04-01
Also published as: CN114451039A

Abstract

A method and device for configuration precoding. The method increases the flexibility of a time-domain precoding poll. The method comprises: a first communication device determines reference signal configuration information, where the reference signal configuration information comprises a reference signal-related time, and the reference signal-related time is used for indicating a duration for employing a same precoding to transmit a reference signal. Within one reference signal cycle, the first communication device transmits the reference signal to a second communication device on the basis of the reference signal configuration information, where the reference signal is precoded on the basis of the related time.

Description

Method and device for configuring precoding

Technical field

This application relates to the field of communication technologies, and in particular to a method and device for configuring precoding.

Background technique

When a terminal device or a base station uses multiple antennas to transmit signals, it is necessary to consider the weighting coefficients mapped between the signal and the antenna array elements, where the weighting coefficients are the precoding matrix. The base station can maximize the energy of the signal reaching the terminal equipment by selecting a suitable precoding matrix. In order to select a suitable precoding matrix, it is usually necessary to obtain channel state information (CSI) without precoding first, and then determine the precoding matrix that can maximize the signal energy according to the CSI. In order to achieve signal transmission under unknown channel state information and different terminal devices can share precoding matrix resources, the industry proposes precoder cycling. The so-called precoding polling refers to that the transmitting end pre-sets a precoding set, and sends signals sequentially through precoding in the precoding set in a frequency domain and/or time domain.

At present, there are two common time-domain precoding polling scenarios for new radio (NR). One is the physical downlink shared channel (PDSCH) for multi-slot scheduling, which can also be called a data channel. , The precoding polling method can be used between time slots. The other is to support time-domain precoding polling in different periods for channel state information reference signals (CSI-RS). The current time-domain precoding polling method has low flexibility.

Summary of the invention

The embodiments of the present application provide a method and device for configuring precoding, which can solve the problem of low flexibility of the time-domain precoding polling manner in the prior art.

In a first aspect, an embodiment of the present application provides a method for configuring precoding. The method includes: a first communication device obtains reference signal configuration information, where the reference signal configuration information includes a reference signal coherence time, and the reference signal coherence time is used for Indicates the duration of sending the reference signal with the same precoding. In one reference signal period, the first communication device sends a reference signal to the second communication device based on the reference signal configuration information, where the reference signal is precoded based on the reference signal coherence time. In the embodiment of the present application, by indicating the granularity of precoding polling, the configuration flexibility of precoding can be improved. In a possible implementation manner, the reference signal configuration information includes: the number of symbols P of the reference signal in one time slot, or the index of the symbols of the reference signal in one time slot. In the above manner, the first communication device and the second communication device can align the configuration information of the reference signal, so that the accuracy of transmitting the reference signal can be improved.

In a possible implementation manner, the reference signal configuration information includes: the number N of time slots that the reference signal lasts. In the above manner, the first communication device and the second communication device can align the configuration information of the reference signal, so that the accuracy of transmitting the reference signal can be improved.

In a possible implementation manner, the reference signal coherence time may include the number S of time units corresponding to the duration of the reference signal, the time unit is a time slot, or the time unit is a symbol. In the above manner, the granularity of precoding can be adjusted by adjusting the value of S, so that the flexibility of precoding can be improved.

In a possible implementation manner, the reference signal coherence time may also include the number of groups T of the reference signal. In the above manner, the granularity of precoding can be adjusted by adjusting the value of T, so that the flexibility of precoding can be improved.

In a possible implementation manner, when the reference signal coherence time is based on the symbol granularity, the reference signal on the same time slot may use the same precoding for every S symbols. In the foregoing manner, the same precoding is used for every S symbols. Compared with the prior art, the granularity of the precoding can be smaller and more flexible.

A possible implementation is that when the coherence time of the reference signal has a time slot as the granularity, in the N time slots that the reference signal lasts, the same precoding can be used for every S time slots. In the above manner, the same precoding is used for every S time slots. Compared with the prior art, the granularity of the precoding can be larger and more flexible.

In a possible implementation manner, when the reference signal coherence time has a symbol granularity, the P symbols of the reference signal in a time slot may include T symbol groups, and the reference signal on each symbol group may use the same precoding. In the above manner, by grouping the symbols in the time slot, the granularity of the precoding can be at the symbol or symbol group level, so that the flexibility of the precoding configuration can be improved.

In a possible implementation manner, when the coherence time of the reference signal has a time slot as the granularity, the last N time slots of the reference signal may include T time slot groups, and the reference signal on each time slot group adopts the same precoding. In the above manner, by grouping multiple continuous time slots, the granularity of the precoding can be at the time slot group level, so that the flexibility of the precoding configuration can be improved.

A possible implementation is that when the coherence time of the reference signal has a granularity of S symbols, in the N time slots that the reference signal lasts, the reference signal on different time slots can use different precoding, each time in the same time slot. The reference signals on the S symbols use the same precoding. Through the above method, the existing protocol can be better compatible, and the changes to the protocol are relatively small.

A possible implementation is that when the coherence time of the reference signal has a granularity of S time slots, in the N time slots that the reference signal lasts, the reference signals on different symbols in the same time slot adopt the same precoding, and every S The reference signals on the two time slots use the same precoding. Through the above method, the existing protocol can be better compatible, and the changes to the protocol are relatively small.

In a possible implementation manner, when the first communication device is a terminal device, when the first communication device obtains the receiving reference signal configuration information, it may receive the reference signal configuration information from the positioning device, or may receive the reference signal configuration information from the serving base station. In the foregoing manner, the terminal device can obtain the reference signal configuration information, so that the reference signal can be sent according to the reference signal configuration information.

In a possible implementation manner, the first communication device may be a terminal device, and the second communication device may be a base station.

In a possible implementation manner, the first communication device may also be a base station, and the second communication device is a terminal device.

In a possible implementation manner, the reference signal may be a positioning reference signal (positioning reference signal, PRS) or a sounding reference signal (sounding reference signal, SRS).

In a second aspect, an embodiment of the present application provides a method for configuring precoding. The method includes: a first communication device receives reference signal configuration information, the reference signal configuration information includes a reference signal coherence time, and the reference signal coherence time is used to indicate the use of The length of time the reference signal is sent with the same precoding. In one reference signal period, the first communication device receives the reference signal sent by the second communication device, where the reference signal is pre-coded based on the reference signal coherence time. In the embodiment of the present application, by indicating the granularity of precoding polling, the configuration flexibility of precoding can be improved.

In a possible implementation manner, the reference signal configuration information may further include: the number P of symbols of the reference signal in one time slot, or the index of the symbols of the reference signal in one time slot. In the above manner, the first communication device and the second communication device can align the configuration information of the reference signal, so that the accuracy of transmitting the reference signal can be improved.

In a possible implementation manner, the reference signal configuration information may further include: the number N of time slots that the reference signal lasts. In the above manner, the first communication device and the second communication device can align the configuration information of the reference signal, so that the accuracy of transmitting the reference signal can be improved.

In a possible implementation manner, the reference signal coherence time may include the number S of time units corresponding to the duration, the time unit is a time slot, or the time unit is a symbol. In the above manner, the granularity of precoding can be adjusted by adjusting the value of S, so that the flexibility of precoding can be improved.

A possible implementation manner is that when the reference signal coherence time is based on the symbol granularity, the reference signal on the same time slot may have the same transmission port for every S symbols. In the above manner, the first communication device may consider that the transmission port of every S symbols is the same, so that the channel state may be combined and estimated based on the S symbols.

A possible implementation is that when the coherence time of the reference signal has a time slot as the granularity, within the N time slots that the reference signal lasts, the transmission port of every S time slot may be the same. In the foregoing manner, the first communication device may consider that the transmission port of each S time slot is the same, so that the channel state can be combined and estimated based on the S time slots.

In a possible implementation manner, when the reference signal coherence time has a symbol granularity, the P symbols of the reference signal in a time slot include T symbol groups, and the transmission port of the reference signal on each symbol group is the same. In the above manner, by grouping the symbols in the time slot, the granularity of the precoding can be at the symbol or symbol group level, so that the flexibility of the precoding configuration can be improved.

In a possible implementation manner, when the coherence time of the reference signal has a time slot as the granularity, the last N time slots of the reference signal include T time slot groups, and the transmission port of the reference signal on each time slot group may be the same. In the above manner, by grouping multiple continuous time slots, the granularity of the precoding can be at the time slot group level, so that the flexibility of the precoding configuration can be improved.

A possible implementation is that when the coherence time of the reference signal has a granularity of S symbols, in the N time slots that the reference signal lasts, the transmission port of the reference signal on different time slots can be different, and every S in the same time slot The reference signals on each symbol use the same precoding. Through the above method, the existing protocol can be better compatible, and the changes to the protocol are relatively small.

A possible implementation method, when the reference signal coherence time is based on the time slot, in the N time slots that the reference signal lasts, the sending ports of the reference signals on different symbols in the same time slot can be the same, and in the same time slot The reference signal on every S symbols uses the same precoding. Through the above method, the existing protocol can be better compatible, and the changes to the protocol are relatively small.

In a possible implementation manner, the first communication device may receive the reference signal configuration information from the positioning device. In the foregoing manner, the first communication device can obtain the reference signal configuration information, and thus can receive the reference signal according to the reference signal configuration information.

In a possible implementation, after the first communication device receives the reference signal sent by the second communication device at the granularity of time length, it can combine the received reference signals, determine the measurement result based on the combined reference signal, and report the measurement to the positioning device result. Because the channel multipath power delay spectrum is different under different precoding, the channel power under some precoding is lower, resulting in lower first path energy, so the first path judged by these precoding is not accurate. As a result, misjudgment is caused. In the above manner, the combined gain is obtained through multiple different precodings, which can effectively prevent the occurrence of misjudgment, thereby improving the robustness of the first path delay estimation.

In a possible implementation manner, the first communication device may also receive a location request message sent by the positioning device, where the location request message is used to indicate the measurement result reported by the first communication device.

In a possible implementation manner, the first communication device may be a base station, and the second communication device may be a terminal device.

In a possible implementation manner, the reference signal is PRS or SRS.

In the third aspect, this application provides a device for configuring precoding. The device may be a communication device, or a chip or chipset in the communication device. The device may include a processing unit and a transceiving unit. When the device is a communication device, the processing unit may be a processor, and the transceiving unit may be a transceiver; the device may also include a storage module, and the storage module may be a memory; the storage module is used to store instructions, and the processing unit The instructions stored in the storage module are executed to enable the communication device to perform the corresponding function in the foregoing first aspect, or to enable the communication device to perform the corresponding function in the foregoing second aspect. When the device is a chip or chipset in a communication device, the processing unit can be a processor, and the transceiver unit can be an input/output interface, a pin or a circuit, etc.; the processing unit executes the instructions stored in the storage module to The communication device is caused to perform the corresponding function in the above-mentioned first aspect, or the communication device is caused to perform the corresponding function in the above-mentioned second aspect. The storage module may be a storage module (for example, register, cache, etc.) in the chip or chipset, or a storage module (for example, read-only memory, random access memory, etc.) located outside the chip or chipset in the network device. Fetch memory, etc.).

In a fourth aspect, a device for configuring precoding is provided, which includes a processor, a communication interface, and a memory. The communication interface is used to transmit information, and/or messages, and/or data between the device and other devices. The memory is used to store computer-executable instructions. When the device is running, the processor executes the computer-executable instructions stored in the memory, so that the device executes the above-mentioned first aspect or any one of the implementations of the first aspect. The method for configuring precoding, or so that the device executes the method for configuring precoding as described in the second aspect or any one of the implementation manners of the second aspect.

In the fifth aspect, a computer storage medium provided by an embodiment of the present application. The computer storage medium stores program instructions. When the program instructions run on a communication device, the communication device executes the first aspect of the embodiments of the present application and any one of them. A possible implementation method, or a method that enables the communication device to execute the second aspect of the embodiment of the present application and any two possible implementation methods thereof.

In a sixth aspect, a computer program product provided by an embodiment of the present application, when the computer program product runs on a communication device, enables the communication device to use the first aspect of the embodiment of the present application and any possible implementation method, or, A method for enabling a communication device in the second aspect of the embodiments of the present application and any possible implementation manner thereof.

In the seventh aspect, a chip provided by an embodiment of the present application is coupled with a memory to execute the method of the first aspect of the embodiment of the present application and any possible implementation manner thereof, or execute the second aspect of the embodiment of the present application And any possible implementation methods.

In addition, the technical effects brought by the second aspect to the fifth aspect can be referred to the description of the above-mentioned first aspect, which is not repeated here.

It should be noted that “coupled” in the embodiments of the present application means that two components are directly or indirectly combined with each other.

Description of the drawings

FIG. 1 is a schematic diagram of the architecture of a communication system provided by this application;

Figure 2 is a schematic diagram of the architecture of another communication system provided by this application;

Figure 3 is a schematic diagram of precoding provided by this application;

FIG. 4 is a schematic diagram of a precoding polling provided by this application;

FIG. 5 is a schematic flowchart of a method for configuring precoding provided by this application;

FIG. 6 is a schematic diagram of a flow chart of terminal device positioning provided by this application;

FIG. 7 is a schematic diagram of another terminal device positioning process provided by this application;

FIG. 8 is a schematic structural diagram of a device for configuring precoding provided by this application;

FIG. 9 is a schematic structural diagram of another device for configuring precoding provided by this application.

detailed description

In order to make the purpose, technical solutions, and advantages of the application more clear, the application will be further described in detail below with reference to the accompanying drawings.

The measurement report method provided in this application can be applied to various communication systems, for example, the Internet of Things (IoT) system, the narrowband Internet of Things (NB-IoT) system, and the long-term evolution ( The long term evolution (LTE) system can also be a fifth-generation (5G) communication system, a hybrid architecture of LTE and 5G, an NR system, and new communication systems that will appear in the development of future communications.

Exemplarily, FIG. 1 shows a schematic diagram of a communication system architecture to which this application is applicable. The communication system may include a core network, a radio access network (RAN), and terminal equipment. The core network may include access And mobility management function (access and mobility management function, AMF), location management function (location management function, LMF) and other functions. Among them, AMF can implement functions such as gateways, and LMF can implement functions such as positioning centers. Of course, it is also in the core network. It can include other network elements, which will not be listed here. AMF and LMF can be connected via NLs interface. The RAN may include one or more network devices. The network devices may be, but are not limited to, ng-eNB, gNB, etc., where ng-eNB is an LTE base station that accesses a 5G core network, and gNB is a 5G base station that accesses a 5G core network. The terminal equipment includes one or more user equipment (UE). The radio access network can be connected to the core network via the AMF through the NG-C interface, and the terminal equipment can be connected to the radio access network via the ng-eNB via LTE-Uu, and can also be connected to the radio access network via the ng-eNB and gNB via NR-Uu. Access to the network.

Figure 2 shows a schematic diagram of another communication system architecture to which this application is applicable. The network equipment in the communication system may include a location management component (LMC). The LMC can implement part of the functions of the LMF, so that it does not need to be introduced through the AMF 5G core network.

The communication system applied in the embodiments of the present application may include a single or multiple gNBs, and a single or multiple UEs. A single gNB can transmit data or control signaling to a single or multiple UEs. Multiple gNBs can also transmit data or control signaling for a single UE at the same time.

It should be understood that FIG. 1 and FIG. 2 are only exemplary illustrations, and do not specifically limit the types, numbers, connection modes, etc., of the network elements included in the communication system applicable to this application.

The LMF involved in the embodiments of the present application is a device or component deployed in the core network to provide a positioning function for the UE.

The LMC involved in the embodiments of the present application is a part of the functional components of the LMF and can be integrated on the gNB on the NG-RAN side.

The terminal device involved in the embodiments of the present application is an entity on the user side for receiving or transmitting signals. The terminal device may be a device that provides voice and/or data connectivity to the user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, and the like. The terminal device can also be another processing device connected to the wireless modem. The terminal device can communicate with one or more core networks through a radio access network (RAN). Terminal equipment can also be called wireless terminal equipment, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point ), remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), user equipment (user device), or user equipment (user equipment, UE) and so on. The terminal device can be a mobile terminal device, such as a mobile phone (or called a "cellular" phone) and a computer with a mobile terminal device. For example, it can be a portable, pocket-sized, handheld, built-in computer or vehicle-mounted mobile device. Exchange language and/or data with the wireless access network. For example, the terminal device can also be a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (personal digital assistant, PDA), and other equipment. Common terminal devices include, for example, mobile phones, tablet computers, notebook computers, handheld computers, mobile internet devices (MID), wearable devices, such as smart watches, smart bracelets, pedometers, etc., but this application is implemented Examples are not limited to this.

The base station involved in the embodiments of the present application is an entity on the network side for transmitting and/or receiving signals, which can be used to convert received air frames and Internet protocol (IP) packets to each other. As a router between the terminal device and the rest of the access network, the rest of the access network may include an IP network and so on. The base station can also coordinate the attribute management of the air interface. For example, the base station may be an evolved Node B (eNB or e-NodeB) in LTE. The eNB is a device deployed in a radio access network that meets the 4G standard and provides wireless communication functions for the UE. The base station can also be a new radio controller (NR controller), a gNode B (gNB) in a 5G system, a centralized network element (centralized unit), a new radio controller, or a radio controller. The remote module can be a micro base station (also called a small station), a relay, a distributed unit, a macro base station of various forms, and a transmission receiving point (transmission). A reception point (TRP), a transmission measurement function (TMF) or a transmission point (TP) or any other wireless access device, or a base station in next-generation communications, but the embodiment of the application is not limited thereto.

When a terminal device or a base station uses multiple antennas to transmit signals, it is necessary to consider the weighting coefficients mapped between the signal and the antenna array elements, where weighting the signal is precoding. The precoding described in this application may also be referred to as a precoding matrix. As shown in Figure 3, when the signal x is sent out through antenna array elements ₀ _{, 1} _{, 2} , and ₃ , it is weighted by the precoding matrix (a 0, a 1, a 2, a 3 ), and then a ₀ x, a ₁ x, a ₂ x, and a ₃ x are sent out. The base station can maximize the energy of the signal reaching the terminal equipment by selecting the appropriate precoding. In order to select a suitable precoding, it is usually necessary to obtain the unprecoded CSI, and then determine the precoding that can maximize the signal energy according to the CSI.

The base station usually needs the assistance of terminal equipment to obtain CSI. For example, the terminal device feeds back CSI or the terminal device sends a sounding reference signal (SRS), but not all reference signal transmissions can obtain channel state information in advance. At the same time, the optimal precoding is terminal device specific, that is to say, the optimal precoding for one terminal device is not the optimal precoding for another terminal device, which leads to the inability of the precoding resources of different terminal devices. Sharing, then when the number of terminal devices in the network is relatively large, it will cause a waste of resources.

In order to solve the above problems, the current precoding polling method, precoding polling is a transmission diversity method, which refers to the sending end pre-setting a precoding set, the precoding set can include multiple precoding, and the signal It is sent out sequentially through precoding in the precoding set in the frequency domain and/or time domain. As shown in Figure 4, frequency domain precoding polling refers to resource element (resource element, RE) sets (such as subbands) with different frequency domain resources using different precoding, and time domain precoding polling refers to different time domain resources. The time domain unit uses different precoding. The two can also be combined to form time-frequency domain precoding polling.

At present, NR treats the physical downlink control channel (PDCCH) and its associated demodulation reference signal (demodulation reference signal, DMRS), physical downlink shared channel (physical downlink shared channel, PDSCH) and its associated DMRS/phase tracking reference signal ( The phase track reference signal (PTRS) can adopt the frequency domain precoding polling method. At the same time, for the multi-slot scheduled PDSCH, the precoding polling method can be used between time slots, that is, different precoding is used for different time slots. For CSI-RS, frequency-domain precoding polling is not supported, but periodic CSI-RS or semi-persistent CSI-RS time-domain precoding polling in different periods is supported, that is, different precoding matrices are used for different periods. And notify the terminal equipment through the time domain measurement limit. When the real-time domain measurement limit is not configured (or closed by default), the terminal device thinks that the CSI-RS is the same in different periods and the channel estimation can be smoothed; when the time domain measurement limit is configured, the terminal device thinks that the CSI-RS is in different periods The precoding may be different, and the channel estimation cannot be smoothed.

However, the current configuration flexibility of precoding polling is low, and it is not suitable for the scenarios involved in terminal device positioning. Specifically, it can only support precoding polling with a single time slot granularity, that is, different time slots use different Precoding. In addition, when precoding polling is used for transmission, the terminal device can only obtain a selection gain, that is, one of multiple precoding gains is selected, and different precodings cannot be used to obtain a combined gain.

Based on this, the embodiments of the present application provide a method and device for configuring precoding. Among them, the method and the device are based on the same technical idea. Since the principles of the method and the device to solve the problem are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

It should be understood that in the embodiments of the present 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 object, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, 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. "The following at least one (item)" or similar expressions refers to any combination of these items, including any combination of single item (item) or plural items (item). For example, at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c It can be single or multiple.

In addition, it should be understood that in the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing description, and cannot be understood as indicating or implying relative importance, nor can it be understood as indicating Or imply the order.

In the embodiment of the present application, the positioning device may be an LMF network element, for example, as shown in FIG. 1, it may also be an LMC (also referred to as RAN-LMC) concentrated in a gNB, for example, as shown in FIG. 2. RAN-LMC corresponds to a base station, or RAN-LMC corresponds to a positioning base station.

In this application, precoding can be understood as using a precoding matrix to weight the signal, or can be understood as using a precoding vector to weight the signal.

The reference signal adopts the same precoding, which can be understood as the same transmission port of the reference signal. In general, the channel states of the channels corresponding to the signals sent by the same transmission port can be considered the same. It can be understood that the same transmission ports of the reference signal can also be understood as the same channel state of the reference signal.

The method for configuring precoding provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings. Among them, this method can be applied to a scenario where a base station sends a downlink reference signal (such as a positioning reference signal (PRS)) to a terminal device. The method can also be applied to a scenario where a terminal device sends an uplink reference signal (for example, SRS) to a base station.

Referring to FIG. 5, a flowchart of a method for configuring precoding provided in this application, the method includes:

S501: The first communication device obtains reference signal configuration information, where the reference signal configuration information includes the reference signal coherence time, and the reference signal coherence time is used to indicate the duration of sending the reference signal using the same precoding.

Wherein, the reference signal configuration information may be used to configure time-frequency resources of the reference signal, etc., for example, the reference signal may be a PRS or an SRS. Exemplarily, the reference signal may be understood as a reference signal resource, and the reference signal resource may be understood as a logical structure carrying reference signal configuration information.

It should be understood that the reference signal configuration information is only an exemplary naming. In specific implementations, the reference signal configuration information can also be named other, such as the following reference signal configuration information, etc., or, when the reference signal is A, also The reference signal configuration information may be referred to as A configuration information. For example, the reference signal is PRS, and the reference signal configuration information may be referred to as PRS configuration information.

The reference signal coherence time is only an exemplary naming. In specific implementations, the reference signal coherence time can also be named other, such as precoding granularity, precoding polling granularity, etc., or, when the reference signal is A, The reference signal coherence time can also be called A coherence time. For example, the reference signal is PRS, and the reference signal coherence time can be called PRS coherence time.

In an implementation manner, when the first communication device is a base station, the reference signal configuration information may be determined by the first communication device itself. The reference signal configuration information may also be sent by the positioning device to the first communication device.

In another implementation manner, when the first communication device is a terminal device, the reference signal configuration information may be sent by the serving base station of the first communication device to the first communication device. The reference signal configuration information may also be sent by the positioning device to the first communication device.

Exemplarily, the reference signal configuration information may include: the number P of symbols of the reference signal in one time slot, or the index of the symbols of the reference signal in one time slot.

The reference signal configuration information may also include: the number of time slots for which the reference signal lasts, N, where N can be understood as the number of time slots for which the reference signal is sent once.

In an implementation manner, if the reference signal configuration information does not include the number of time slots N the reference signal lasts, N=1 can be defaulted.

In some embodiments, the reference signal coherence time may have a symbol granularity, and the reference signal coherence time may include the number S of symbols corresponding to the foregoing duration, or the reference signal coherence time may also include the reference signal in a time slot. The number of symbol groups T, where the duration may be equal to the number of symbols included in each group.

Further, the duration (or the number of symbols included in each group) may be determined according to the number of symbols P and the number of symbol groups T of the reference signal in a time slot.

In other embodiments, the reference signal coherence time may also be based on time slots, and the reference signal coherence time may include the number M of time slots corresponding to the aforementioned duration, or the reference signal coherence time may also include the time of the reference signal. The number of slot groups G, where the duration may be equal to the number of slots included in each group.

Further, the duration (or the number of timeslots included in each group) may be determined according to the number of timeslots N and the number of timeslot groups G that the reference signal lasts.

The reference signal configuration information may be through radio resource control (radio resource control, RRC) signaling, or media access control control element (MAC-CE), or downlink control information (DCI) signaling.令Configuration.

Exemplarily, for example, through the information element configuration in RRC signaling, for example:

Among them, DL-PRS-Resource{} is the reference signal configuration information, symbolPerSlot is the number of symbols in a slot (P), nrSlots is the number of consecutive slots (N), coherenceTime is the reference signal coherence time, and coherenceSlot is the reference signal coherence The number of time slots (M), slotGroups is the number of reference signal coherence time slot groups (G), coherenceSymb is the number of reference signal coherence time symbols (S), and symbolGroups is the number of reference signal coherence time symbol groups (T).

S502: The second communication device obtains reference signal configuration information.

Wherein, when the second communication device is a terminal device, the reference signal configuration information may be sent by the positioning device to the second communication device, or sent by the serving base station of the second communication device to the second communication device.

When the second communication device is a base station, the reference signal configuration information may be sent by the positioning device to the second communication device, or may be determined by the second communication device itself.

It should be understood that there is no strict execution order for the above steps S501 and S502. S501 may be executed first and then S502 may be executed first, S502 may be executed first and then S501 may be executed, or S501 and S502 may be executed simultaneously, which is not specifically limited here.

S503: In one reference signal period, the first communication device sends a reference signal to the second communication device based on the reference signal configuration information, where the reference signal is precoded based on the reference signal coherence time. Correspondingly, the second communication device receives the reference signal based on the reference signal configuration information.

In an exemplary description, if the first communication device is a terminal device, the precoding matrix used by the first communication device to precode the reference signal may be pre-stored locally by the first communication device, or it may be the first communication device. The serving base station of the device is configured for the first communication device. If the first communication device is a base station, the precoding matrix used when the first communication device precodes the reference signal may be pre-stored locally by the base station.

In an implementation manner, the first communication device may include at least one precoding set, and one precoding set may include multiple precoding matrices.

For example, the first communication device may include a first precoding set, and the first precoding set may include multiple one-dimensional matrices, and the one-dimensional matrix may be used to weight a single stream signal. For example, the first precoding set may include three one-dimensional matrices, so that the first communication device may sequentially use the three one-dimensional matrices to perform precoding polling:

Wherein, n is equal to the number of transmitting antenna elements of the first communication device.

For another example, the first communication device may include a second precoding set, and the second precoding set may include multiple two-dimensional matrices, and the two-dimensional matrix may be used to weight two signal streams. For example, the second precoding set may include three two-dimensional matrices, so that the first communication device may sequentially use the three two-dimensional matrices to perform precoding polling:

Of course, the first communication device may also include other precoding sets, and the other precoding sets may include multiple other dimensions of precoding, such as a three-dimensional precoding matrix (used to perform precoding weighting on three signal streams), and a four-dimensional precoding set. Coding matrix (used to perform precoding weighting on four signal streams) and so on. In the following, taking the reference signal coherence time with the symbol granularity as an example, the process of the first communication device sending the reference signal corresponding to the reference signal to the second communication device will be described.

Embodiment 1: The reference signal coherence time includes S symbols. If S can divide P evenly, P symbols in a time slot can be divided into

Reference signal groups, each group can contain S consecutive symbols. Then, for the reference signal in the same time slot, the same precoding can be used for every S symbols. Correspondingly, for the reference signal in the same time slot, the second communication device can consider that the transmission port of every S symbols is the same. It should be understood that when the transmission ports of the two symbols are the same, it can be considered that the channel states of the two symbols are the same.

For example, suppose S is equal to 3, P is equal to 12, and the symbols of the reference signal in a time slot are 1-12. The 12 symbols can be divided into 4 reference signal groups, which are symbols 1 to 3, and symbols 4 to 4. 6. Symbols 7-9, symbols 10-12. For reference signals in the same time slot, the same precoding can be used for every 3 symbols, that is, the first communication device can use the same precoding for symbols 1 to 3, and the same precoding for symbols 4 to 6. For coding, the same precoding is used for symbols 7-9, and the same precoding is used for symbols 10-12.

Assuming that the reference signal is a single-stream signal, taking the above first precoding set as an example, symbols 1 to 3 can be precoded using precoding matrix A1, symbols 4 to 6 can be precoded using precoding matrix A2, and symbols 7 to 9 The precoding matrix A3 can be used for precoding, and the symbols 10 to 12 can be precoded using the precoding matrix A4. It is understandable that different reference signal groups are not limited to using different precoding matrices for precoding, and different reference signal groups can also be precoding using the same precoding matrix. For example, symbols 1 to 3 are precoding using precoding matrix A1. , Symbols 4 to 6 are pre-encoded using the pre-encoding matrix A1, and so on.

Correspondingly, the second communication device can consider that the transmission ports of every 3 symbols are the same, that is, the second communication device can consider that the transmission ports of symbols 1 to 3 are the same, the transmission ports of symbols 4 to 6 are the same, and the transmission ports of symbols 7 to 9 are the same. The same, the sending ports of symbols 10-12 are the same.

Embodiment 2: The reference signal coherence time includes the number T of symbol groups. If T can divide P evenly, P symbols in a time slot can be divided into T reference signal groups, and each reference signal group can contain

Consecutive symbols. Then for the reference signal in the same time slot, every

The symbols use the same precoding. Correspondingly, for the reference signal in the same time slot, the second communication device can be considered every time

The sending ports of the symbols are the same.

For example, suppose that T is equal to 4 and P is equal to 12, and the symbols of the reference signal in a time slot are 1-12. The 12 symbols can be divided into 4 reference signal groups, which are symbols 1 to 3 and symbols 4 to 4. 6. Symbols 7-9, symbols 10-12. For reference signals in the same time slot, the same precoding can be used for every 3 symbols, that is, the first communication device can use the same precoding for symbols 1 to 3, and the same precoding for symbols 4 to 6. For coding, the same precoding is used for symbols 7-9, and the same precoding is used for symbols 10-12.

Embodiment 3: The reference signal coherence time includes S symbols. If S cannot divide P evenly, P symbols in one time slot are divided into t=ceil(P/S) reference signal groups, and ceil is rounded up. Each of the first (t-1) reference signal groups may include S consecutive symbols, and the t-th reference signal group may include P-(T-1)*S consecutive symbols. Therefore, for reference signals in the same time slot, the symbols in the same reference signal group can use the same precoding. Correspondingly, for the reference signals in the same time slot, the second communication device can consider that the transmission ports of the symbols in the same reference signal group are the same.

For example, suppose S is equal to 3 and P is equal to 13, and the symbols of the reference signal in a time slot are 1-13 respectively. The 12 symbols can be divided into ceil(13/3)=5 reference signal groups, where the former Each of the 4 reference signal groups includes 3 symbols, and the last group includes 1 symbol. The 5 reference signal groups are symbols 1 to 3, symbols 4 to 6, symbols 7 to 9, symbols 10 to 12, and symbols. 13. For reference signals in the same time slot, the symbols in the same reference signal group can use the same precoding, that is, the first communication device can use the same precoding for symbols 1 to 3, and for symbols 4 to 6. The same precoding is used, the same precoding is used for symbols 7-9, the same precoding is used for symbols 10-12, and the same precoding is used for symbol 13.

Assuming that the reference signal is a single-stream signal, taking the above first precoding set as an example, symbols 1 to 3 can be precoded using precoding matrix A1, symbols 4 to 6 can be precoded using precoding matrix A2, and symbols 7 to 9 The precoding matrix A3 can be used for precoding, the symbols 10-12 can be precoded by using the precoding matrix A4, and the symbol 13 can be precoded by using the precoding matrix A2. It is understandable that different reference signal groups are not limited to using different precoding matrices for precoding, and different reference signal groups can also be precoding using the same precoding matrix. For example, symbols 1 to 3 are precoding using precoding matrix A1. , Symbols 4 to 6 are pre-encoded using the pre-encoding matrix A1, and so on. Correspondingly, the second communication device can consider that the transmission ports of the symbols in the same reference signal group are the same, that is, the second communication device can consider that the transmission ports of the symbols 1 to 3 are the same, the transmission ports of the symbols 4 to 6 are the same, and the symbols 7 to 7 are the same. The sending port of 9 is the same, the sending port of symbols 10 to 12 is the same, and the sending port of symbol 13 is the same.

Embodiment 4: The reference signal coherence time includes the number T of symbol groups. If T is not divisible by P, P symbols in a time slot are divided into T reference signal groups, where each of the first mod (P, T) reference signal groups includes ceil (P/T) symbols, and the last T- Each of the mod(P,T) reference signal groups includes ceil(P/T)-1 symbols. Mod is the remainder operation, and ceil is rounding up. Therefore, for reference signals in the same time slot, the symbols in the same reference signal group can use the same precoding. Correspondingly, for the reference signals in the same time slot, the second communication device can consider that the transmission ports of the symbols in the same reference signal group are the same.

For example, suppose that T is equal to 4 and P is equal to 13, and the symbols of the reference signal in a time slot are 1-13. The 12 symbols can be divided into 4 reference signal groups, and the first reference signal group includes 4 Each of the last three reference signal groups includes three symbols, and the four reference signal groups are symbols 1 to 4, symbols 5 to 7, symbols 8 to 10, and symbols 11 to 13. For reference signals in the same time slot, the symbols in the same reference signal group can use the same precoding, that is, the first communication device can use the same precoding for symbols 1 to 4, and for symbols 5 to 7. The same precoding is used, the same precoding is used for symbols 8-10, and the same precoding is used for symbols 11-13.

Assuming that the reference signal is a single stream signal, taking the above first precoding set as an example, symbols 1 to 4 can be precoded using precoding matrix A1, symbols 5 to 7 can be precoded using precoding matrix A2, and symbols 8 to 10 The precoding matrix A3 can be used for precoding, and the symbols 11 to 13 can be precoded by using the precoding matrix A4. It is understandable that different reference signal groups are not limited to using different precoding matrices for precoding. Different reference signal groups can also be precoding using the same precoding matrix. For example, symbols 1 to 4 are precoding using precoding matrix A1. , Symbols 8-10 are pre-encoded using the pre-encoding matrix A1, and so on.

Correspondingly, the second communication device can consider that the transmission ports of the symbols in the same reference signal group are the same, that is, the second communication device can consider that the transmission ports of the symbols 1 to 4 are the same, the transmission ports of the symbols 5 to 7 are the same, and the symbols 8 to The sending ports of 10 are the same, and the sending ports of symbols 11 to 13 are the same.

In an exemplary description, the precoding used by different groups in the foregoing four implementation manners may be different, and of course may also be the same, which is not specifically limited here.

In some embodiments, when the reference signal coherence time has a symbol granularity, in the N time slots that a reference signal lasts, precoding used by different time slots may be different. Correspondingly, within the N time slots that a reference signal lasts, the second communication device may consider that the transmission ports of the reference signals in different time slots are different.

When the reference signal coherence time is based on the time slot as the granularity, the method for the first communication device to send the reference signal corresponding to the reference signal to the second communication device is similar to the method described in the first to fourth embodiments above, and is similar to the reference signal coherence time Compared with the manner in which the first communication device sends the reference signal corresponding to the reference signal to the second communication device when the granularity of the symbol is used, other precoding rules are the same except that the time unit is different.

For example, in the first embodiment: the reference signal coherence time includes M time slots. In the continuous N time slots of the reference signal, if M can divide N, the consecutive N time slots can be divided into N/M reference signal groups, and each group can contain M time slots. Then, for the N time slots to which the reference signal is continuously mapped, the same precoding may be used for every M time slots.

Embodiment 2: The reference signal coherence time includes the number of time slot groups G. In the consecutive N time slots of the reference signal, if G can divide N, the consecutive N time slots can be divided into G reference signal groups, and each reference signal group can contain N/G time slots. Then, for the N time slots to which the reference signal is continuously mapped, the same precoding may be used for every N/G time slots.

Embodiment 3: The reference signal coherence time includes M time slots. In the consecutive N time slots of the reference signal, if M cannot divide N, the consecutive N time slots can be divided into t=ceil(N/M) reference signal groups, and ceil is rounded up. Each of the first t-1 reference signal groups may include M time slots, and the t-th reference signal group may include N-(t-1)*M time slots. Then, for the N time slots to which the reference signal is continuously mapped, the time slots in the same reference signal group may use the same precoding.

Embodiment 4: The reference signal coherence time includes the number of time slot groups G. In the consecutive N time slots of the reference signal, if G cannot divide N, the consecutive N time slots can be divided into G reference signal groups, where each of the first mod (N, G) reference signal groups includes ceil (N/G) time slots, each of the last T-mod (N, G) reference signal groups includes ceil (N/G)-1 time slots. Mod is the remainder operation, and ceil is rounding up. Then, for the N time slots to which the reference signal is continuously mapped, the time slots in the same reference signal group may use the same precoding.

In some embodiments, when the coherence time of the reference signal has a time slot as the granularity, in the N time slots where the reference signal lasts, the reference signals on different symbols in the same time slot may use the same precoding. Correspondingly, in the N time slots where the reference signal lasts, the second communication device may consider that the transmission ports of the reference signals on different symbols in the same time slot are different.

In a possible implementation manner, after the second communication device receives the reference signal sent by the first communication device, the second communication device may measure the reference signal, obtain the measurement result, and report the measurement result to the positioning device.

In an implementation manner, the second communication device measures the reference signal to obtain the measurement result, which can be implemented in the following manner:

A1, the second communication device combines the received reference signals, so as to obtain a spatial diversity gain.

For example, in a reference signal period, the second communication device receives reference signals sent using different precoding, and it is estimated that the receiving branch k (for example, receiving antenna k or receiving port k) of the second communication device is under precoding i Equivalent channel impulse response

Understandably, the equivalent meaning can be

Where w _i is the precoding vector (or called the precoding matrix) corresponding to precoding i, and h _k (n) is the channel impulse response vector, indicating each transmission antenna (also called a transmission port) of the first communication device The channel impulse response to the time delay n on the receiving branch k. The second communication device may not need to know the actual w _i or the actual h _k (n), and may only need to know the equivalent channel impulse response

It can be understood that the precoding i may be the precoding used by the i-th reference signal group. The equivalent channel impulse response of the receiving branch k under the precoding i can be determined by the i-th reference signal group received by the receiving branch k. Taking the above implementation mode 1 as an example, the second communication device can determine the equivalent channel impulse response of receiving branch k under precoding 1 according to the reference signals on the receiving symbols 1 to 3 of receiving branch k

Determine the equivalent channel impulse response of receiving branch k under precoding 2 according to the reference signal on receiving symbol 4～6 of receiving branch k

Receiving branch k receives the reference signal on symbols 7-9 to determine the equivalent channel impulse response of receiving branch k under precoding 3

Receiving branch k receives the reference signal on symbols 10 to 12 to determine the equivalent channel impulse response of receiving branch k under precoding 3

In an implementation manner, the second communication device may synthesize the equivalent channel impulse responses received by the receiving branch under multiple precodings for each receiving branch to obtain a composite equivalent channel impulse response value. Exemplarily, taking receiving branch k as an example, the equivalent channel impulse response composite value of receiving branch k

_{And judge the first path position D(h k} ) according to the equivalent channel impulse response composite value of each receiving branch, where D(·) is the algorithm for calculating the first path, input the equivalent channel impulse response composite value of the receiving branch k h _k (n), the first path of the receiving branch k can be obtained. Taking the above implementation mode 1 as an example, the second communication device combines the equivalent channel impulse responses received by the receiving branch k under 4 precodings to obtain

Through D(h _k (n)), the first path position of the receiving branch k can be determined. The second communication device may determine a first path according to the first path of each receiving branch as the final result. For example, the first path of each receiving branch may be selected as the final result, or the first path of each receiving branch may be selected as the final result. The average value of the diameter is used as the final result.

In another implementation manner, the second communication device may also calculate the first path separately for the equivalent channel impulse response received under each precoding, and take the earliest one of all the first paths, that is,

Here D(·) is the algorithm for calculating the first path, input

Corresponding to {h _k (n) ⁽ⁱ⁾ |n∈I}, where I is the time delay index set of the channel impulse response. Taking the foregoing implementation manner 1 as an example, the second communication device may synthesize the equivalent channel impulse responses of the precoding on each receiving branch for each precoding. Assuming that the second communication device has 2 receiving branches, for precoding 1, the second communication device can determine that receiving branch 1 is received under precoding 1 according to the reference signals on symbols 1 to 3 received by receiving branch 1. Equivalent channel impulse response

Determine the equivalent channel impulse response received by receiving branch 2 under precoding 1 according to the reference signals on symbols 1 to 3 received by receiving branch 2

will

versus

After combining, the equivalent channel impulse response received under precoding 1 is obtained, and then the first path corresponding to precoding 1 is determined according to the equivalent channel impulse response received under precoding 1. In the same way, the first path corresponding to precoding 2, the first path corresponding to precoding 3, and the first path corresponding to precoding 4 are sequentially obtained. The second communication device takes the earliest first path among the first paths corresponding to precoding 1 to 4 respectively

As the final result.

A2. The second communication device determines the measurement result according to the combined reference signal.

Because the channel multipath power delay spectrum is different under different precoding, the channel power under some precoding is lower, resulting in lower first path energy, so the first path judged by these precoding is not accurate. This leads to misjudgment. In the embodiment of the present application, multiple different precodings are used to obtain the combined gain, which can effectively prevent the misjudgment from occurring, thereby improving the robustness of the first path delay estimation.

In some embodiments, before reporting the measurement result to the positioning device, the second communication device may receive a location request message sent by the positioning device, and the location request message may be used to instruct the second communication device to measure and report the measurement result.

In order to facilitate the understanding of the embodiments of the present application, the following takes the base station to send a downlink reference signal to the terminal device as an example, combined with the terminal device positioning scenario for description, referring to FIG. 6, the terminal device measuring and reporting location information may include:

S601. The positioning device sends the downlink reference signal configuration information of the base station to the terminal device.

Wherein, the downlink reference signal configuration information may include the PRS resource coherence time. It may also include one or more of the number of symbols P in the PRS resource slot, the index of the symbols in the PRS resource slot, or the number of consecutive slots N of the PRS resource.

For the coherence time of the PRS resource, please refer to the related description of the reference signal coherence time for details, which will not be repeated here.

S602. The positioning device sends a location information request to the terminal device.

Wherein, the location information request may include a measurement result that instructs the terminal device to measure and report the PRS.

There is no strict execution order for steps S601 and S602. S601 can be executed first and then S602, or S602 can be executed before S601, or S601 and S602 can be executed at the same time, which is not specifically limited here.

S603: The base station sends the PRS to the terminal device according to the downlink reference signal configuration information. Wherein, the downlink reference signal configuration information may be determined by the base station itself, or may be sent by the positioning device to the base station. Correspondingly, the terminal device receives the PRS sent by the base station according to the downlink reference signal configuration information.

Among them, the process of sending the PRS by the base station and the process of receiving the PRS by the terminal equipment can refer to the above-mentioned Embodiment 1 to Embodiment 4, which will not be repeated here.

S604: The terminal device measures the received PRS to obtain a measurement result, and reports the measurement result to the positioning device.

Among them, the terminal device measures the PRS and obtains the measurement result. For details, please refer to the second communication device to measure the reference signal in the preceding text to obtain the relevant description of the measurement result, and the repetition will not be repeated here.

S605: The terminal device reports the measurement result to the positioning device.

In the following, a terminal device sends an uplink reference signal to a base station as an example, combined with a terminal device positioning scenario for description, referring to Figure 7, the process of measuring and reporting location information for the base station may include:

S701: The serving base station reports uplink reference signal configuration information to the positioning device.

Wherein, the uplink reference signal configuration information may include the SRS resource coherence time. It may also include one or more of the number of symbols P in the SRS resource slot, the index of the symbols in the SRS resource slot, or the number of consecutive slots N of the SRS resource.

Among them, the SRS resource coherence time, for details, please refer to the relevant description of the reference signal coherence time, which will not be repeated here.

S702: The terminal device obtains uplink reference signal configuration information. One implementation manner is that the serving base station sends uplink reference signal configuration information to the terminal device, and another implementation manner is that the positioning device sends uplink reference signal configuration information to the terminal device.

S703. The positioning device sends a location information request to each base station. Among them, each base station may include the serving base station of the terminal device.

Wherein, the location information request may include a measurement result instructing the base station to measure and report the SRS.

There is no strict execution order for steps S703 and S701. S703 can be executed first and then S701 can be executed, S701 can be executed first and then S703 can be executed, or S701 and S703 can be executed at the same time, which is not specifically limited here.

S704. The terminal device sends an SRS to each base station according to the uplink reference signal configuration information. Correspondingly, each base station receives the SRS sent by the terminal device according to the uplink reference signal configuration information. Wherein, the uplink reference signal configuration information may be determined by the base station itself, or may be sent by the positioning device to the base station.

For the process of sending the SRS by the terminal device, please refer to the first embodiment to the fourth embodiment above, which will not be repeated here. For the process of receiving the SRS by the base station, please refer to the above-mentioned Embodiment 1 to Embodiment 4, which will not be repeated here.

S705: Each base station measures the received SRS, obtains the measurement result, and reports the measurement result to the positioning device.

Among them, the base station measures the SRS to obtain the measurement result. For details, refer to the second communication device for measuring the reference signal in the foregoing text to obtain the relevant description of the measurement result, and the repetition will not be repeated here.

S706: Each base station reports the measurement result to the positioning device.

In the embodiment of the present application, parameter configuration information is used to indicate the granularity of precoding, so that the sending end can follow the indicated granularity. Compared with the time-domain precoding polling method in the prior art, the embodiment of the present application can flexibly select the granularity of precoding, which can improve the flexibility of precoding configuration. In addition, in a positioning scenario, precoding polling can enable spatial diversity, so that the receiving end can combine reference signals based on different precodings to obtain measurement results, which can contribute to high-precision positioning.

Based on the same inventive concept as the method embodiment, an embodiment of the present application provides a device for configuring precoding. The structure of the measurement reporting apparatus may be as shown in FIG. 8, including a processing unit 801 and a transceiver unit 802.

In an implementation manner, the device for configuring precoding may be specifically used to implement the method executed by the first communication device in the embodiment of FIG. 5. The device may be the first communication device itself or the chip in the first communication device. Or a part of the chipset or chip used to perform related method functions. Wherein, the first communication device may be a terminal device or a base station. Wherein, the processing unit 801 is configured to obtain reference signal configuration information, the reference signal configuration information includes a reference signal coherence time, and the reference signal coherence time is used to indicate the duration of sending the reference signal using the same precoding. The transceiver unit 802 is configured to send a reference signal to the communication device based on the reference signal configuration information within a reference signal period, where the reference signal is pre-coded based on the reference signal coherence time.

Exemplarily, the reference signal configuration information may further include: the number P of symbols of the reference signal in one time slot, or the index of the symbols of the reference signal in one time slot.

The reference signal configuration information may also include: the number N of time slots that the reference signal lasts.

In an exemplary illustration, the reference signal coherence time may include the number S of time units corresponding to the duration, or the reference signal coherence time may also include the number T of groupings of the reference signal. Among them, the time unit is a time slot or a symbol.

When the reference signal coherence time is based on the symbol granularity, the reference signal on the same time slot may use the same precoding for every S symbols.

Or, when the reference signal coherence time is based on the time slot granularity, in the N time slots that the reference signal lasts, the same precoding may be used for every S time slots.

When the reference signal coherence time is based on the symbol granularity, the P symbols of the reference signal in a time slot include T symbol groups, and the reference signal on each symbol group may use the same precoding.

Alternatively, when the coherence time of the reference signal has a time slot as the granularity, the last N time slots of the reference signal include T time slot groups, and the reference signal on each time slot group may use the same precoding.

When the reference signal coherence time takes the symbol as the granularity, in the N time slots that the reference signal lasts, the reference signals on different time slots can adopt different precoding.

When the reference signal coherence time is based on the time slot, in the N time slots that the reference signal lasts, the reference signals on different symbols in the same time slot can use the same precoding.

The processing unit 801 may be specifically configured to: receive the reference signal configuration information from the positioning device through the transceiver unit 802; or receive the reference signal configuration information from the serving base station through the transceiver unit 802 when obtaining the received reference signal configuration information.

In another implementation manner, the device for configuring precoding may be specifically used to implement the method executed by the second communication device in the embodiment of FIG. 5, and the device may be the second communication device itself or the device in the second communication device. A chip or chipset or part of a chip used to perform related method functions. Wherein, the second communication device may be a terminal device or a base station. Among them, the transceiving unit 802 is used to transmit information and signals; the processing unit 801 is used to perform through the transceiving unit 802: receiving reference signal configuration information, the reference signal configuration information includes the reference signal coherence time, the reference signal coherence time is used to indicate the same Precoding the duration of sending the reference signal; within a reference signal period, the reference signal sent by the communication device is received, and the reference signal is precoded based on the reference signal coherence time.

When the reference signal coherence time is based on the symbol granularity, the reference signal on the same time slot can have the same transmission port for every S symbols.

Alternatively, when the reference signal coherence time is based on the time slot granularity, within the N time slots that the reference signal lasts, the transmission port of each S time slot may be the same.

When the reference signal coherence time is based on the symbol granularity, the P symbols of the reference signal in one time slot include T symbol groups, and the transmission port of the reference signal on each symbol group may be the same.

Or, when the reference signal coherence time is based on the time slot granularity, the N time slots that the reference signal lasts include T time slot groups, and the transmission port of the reference signal on each time slot group may be the same.

When the reference signal coherence time is based on the symbol granularity, in the N time slots that the reference signal lasts, the transmission ports of the reference signal on different time slots may be different.

When the reference signal coherence time takes time slots as the granularity, in the N time slots where the reference signal lasts, the sending ports of the reference signals on different symbols in the same time slot can be the same.

In some embodiments, the reference signal configuration information may come from the positioning device.

In a possible implementation manner, the processing unit 801, after receiving the reference signal corresponding to the reference signal sent by the communication device through the transceiving unit 802, may also be used to: combine the received reference signal; determine the measurement based on the combined reference signal Result: The measurement result is reported to the positioning device through the transceiver unit 802.

The transceiver unit 802 may also be used to: receive a location request message sent by the positioning device, where the location request message is used to instruct the device to measure and report a measurement result.

The division of modules in the embodiments of this application is illustrative, and it is only a logical function division. In actual implementation, there may be other division methods. In addition, the functional modules in the various embodiments of this application can be integrated into one process. In the device, it can also exist alone physically, or two or more modules can be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or software function modules. It can be understood that, for the function or implementation of each module in the embodiment of the present application, reference may be made to the related description of the method embodiment.

In a possible manner, a device for configuring precoding may be as shown in FIG. 9, and the device may be a communication device or a chip in a communication device. The device may include a processor 901, a communication interface 902, and a memory 903. The processing unit 801 may be a processor 901. The transceiver unit 802 may be a communication interface 902.

The processor 901 may be a central processing unit (central processing unit, CPU), or a digital processing unit, and so on. The communication interface 902 may be a transceiver, an interface circuit such as a transceiver circuit, etc., or a transceiver chip, and so on. The device further includes: a memory 903, which is used to store a program executed by the processor 901. The memory 903 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as a random access memory (random access memory). -access memory, RAM). The memory 903 is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited to this.

The processor 901 is configured to execute the program code stored in the memory 903, and is specifically configured to execute the actions of the above-mentioned processing unit 801, which will not be repeated here in this application. The communication interface 902 is specifically configured to perform the actions of the above-mentioned transceiver unit 802, which will not be repeated in this application.

The specific connection medium between the above-mentioned communication interface 902, the processor 901, and the memory 903 is not limited in the embodiment of the present application. In the embodiment of the present application, the memory 903, the processor 901, and the communication interface 902 are connected by a bus 904 in FIG. 9. The bus is represented by a thick line in FIG. 9, and the connection modes between other components are only for schematic illustration. , Is not limited. The bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of presentation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.

The embodiment of the present invention also provides a computer-readable storage medium for storing computer software instructions required to be executed to execute the foregoing processor, which contains a program required to execute the foregoing processor.

In the above-mentioned 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 computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website site, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-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 a 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, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, an SSD).

This application is described with reference to the flowcharts and/or block diagrams of the methods, equipment (systems), and computer program products according to the application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims

A method for configuring precoding, characterized in that the method includes:

The first communication device obtains reference signal configuration information, where the reference signal configuration information includes a reference signal coherence time, and the reference signal coherence time is used to indicate the duration of sending the reference signal using the same precoding;

In one reference signal period, the first communication device sends a reference signal to the second communication device based on the reference signal configuration information, where the reference signal is precoded based on the reference signal coherence time.
The method according to claim 1, wherein the reference signal configuration information further comprises:

The number P of symbols of the reference signal in one time slot, or the index of the symbols of the reference signal in one time slot.
The method according to claim 1 or 2, wherein the reference signal configuration information further comprises:

The number of time slots that the reference signal lasts is N.
The method according to any one of claims 1 to 3, wherein the reference signal coherence time includes the number S of time units corresponding to the duration, or the reference signal coherence time includes the reference signal Number of groups T;

Wherein, the time unit is a time slot or a symbol.
The method according to claim 4, wherein when the reference signal coherence time has a symbol granularity, the reference signal on the same time slot uses the same precoding for every S symbols;

Or, when the coherence time of the reference signal has a time slot as the granularity, within the N time slots that the reference signal lasts, the same precoding is used for every S time slots.
The method according to claim 4, wherein when the coherence time of the reference signal has a symbol granularity, the P symbols of the reference signal in a time slot include T symbol groups, and the The reference signal uses the same precoding;

Alternatively, when the coherence time of the reference signal has a time slot as the granularity, the N time slots that the reference signal lasts include T time slot groups, and the reference signal on each time slot group adopts the same precoding.
The method according to any one of claims 4 to 6, wherein when the reference signal coherence time has a symbol granularity, in the N time slots that the reference signal lasts, the reference signals on different time slots The signal uses different precoding.
The method according to any one of claims 4 to 6, wherein when the coherence time of the reference signal has a time slot as the granularity, in the N time slots that the reference signal lasts, different in the same time slot The reference signal on the symbol uses the same precoding.
The method according to any one of claims 1 to 8, wherein the obtaining of the reference signal configuration information by the first communication device comprises:

Receiving, by the first communication device, the reference signal configuration information from a positioning device;

Alternatively, the first communication device receives the reference signal configuration information from the serving base station.
A method for configuring precoding, characterized in that the method includes:

The first communication device receives reference signal configuration information, where the reference signal configuration information includes a reference signal coherence time, and the reference signal coherence time is used to indicate the duration of sending the reference signal using the same precoding;

In one reference signal period, the first communication device receives the reference signal sent by the second communication device, where the reference signal is pre-coded based on the reference signal coherence time.
The method according to claim 10, wherein the reference signal configuration information further comprises:

The number P of symbols of the reference signal in one time slot, or the index of the symbols of the reference signal in one time slot.
The method according to claim 10 or 11, wherein the reference signal configuration information further comprises:

The number of time slots that the reference signal lasts is N.
The method according to any one of claims 10-12, wherein the reference signal coherence time includes the number S of time units corresponding to the duration, or the reference signal coherence time includes the reference signal Number of groups T;

Wherein, the time unit is a time slot or a symbol.
The method according to claim 13, wherein when the reference signal coherence time has a symbol granularity, the reference signal in the same time slot has the same transmission port for every S symbols;

Or, when the coherence time of the reference signal uses time slots as the granularity, within the N time slots that the reference signal lasts, the transmission port of every S time slots is the same.
The method according to claim 13, wherein when the coherence time of the reference signal has a symbol granularity, the P symbols of the reference signal in a time slot include T symbol groups, and the The sending port of the reference signal is the same;

Alternatively, when the coherence time of the reference signal has a time slot as the granularity, the N time slots that the reference signal lasts include T time slot groups, and the transmission port of the reference signal on each time slot group is the same.
The method according to any one of claims 13 to 15, wherein when the coherence time of the reference signal is at a symbol granularity, within the N time slots that the reference signal lasts, the reference signals on different time slots The signal sending port is different.
The method according to any one of claims 13 to 15, wherein when the coherence time of the reference signal has a time slot as the granularity, within the N time slots that the reference signal lasts, different in the same time slot The transmission port of the reference signal on the symbol is the same.
The method according to any one of claims 10 to 17, wherein the receiving of the reference signal configuration information by the first communication device comprises:

The first communication device receives the reference signal configuration information from the positioning device.
The method according to any one of claims 10 to 18, wherein after the first communication device receives the reference signal sent by the second communication device at the granularity of the duration, the method further comprises:

Combining the received reference signal by the first communication device;

Determining, by the first communication device, a measurement result according to the combined reference signal;

The first communication device reports the measurement result to the positioning device.
The method of claim 19, wherein the method further comprises:

The first communication device receives a location request message sent by the positioning device, where the location request message is used to indicate a measurement result reported by the first communication device.
A device for configuring precoding, characterized in that the device comprises:

A processing unit, configured to obtain reference signal configuration information, where the reference signal configuration information includes a reference signal coherence time, and the reference signal coherence time is used to indicate the duration of sending the reference signal using the same precoding;

The transceiver unit is configured to send a reference signal to the communication device based on the reference signal configuration information within a reference signal period, where the reference signal is pre-coded based on the coherence time.
The apparatus of claim 21, wherein the reference signal configuration information further comprises:

The number P of symbols of the reference signal in one time slot, or the index of the symbols of the reference signal in one time slot.
The apparatus according to claim 21 or 22, wherein the reference signal configuration information further comprises:

The number of time slots of the reference signal N.
The apparatus according to claim 22 or 23, wherein the reference signal coherence time includes the number S of time units corresponding to the duration, or the reference signal coherence time includes the number of groups T of the reference signal ；

Wherein, the time unit is a time slot or a symbol.
The apparatus according to claim 24, wherein when the reference signal coherence time has a symbol granularity, the reference signal on the same time slot uses the same precoding for every S symbols;

Or, when the coherence time of the reference signal has a time slot as the granularity, within the N time slots that the reference signal lasts, the same precoding is used for every S time slots.
The apparatus according to claim 24, wherein when the reference signal coherence time has a symbol granularity, the P symbols of the reference signal in a time slot include T symbol groups, and the number of symbols on each symbol group The reference signal uses the same precoding;

Alternatively, when the coherence time of the reference signal has a time slot as the granularity, the N time slots that the reference signal lasts include T time slot groups, and the reference signal on each time slot group adopts the same precoding.
The device according to any one of claims 24 to 26, wherein when the reference signal coherence time has a symbol granularity, in the N time slots that the reference signal lasts, the reference signals on different time slots The signal uses different precoding.
The apparatus according to any one of claims 24 to 26, wherein when the coherence time of the reference signal is based on the time slot granularity, in the N time slots that the reference signal lasts, different in the same time slot The reference signal on the symbol uses the same precoding.
The apparatus according to any one of claims 21 to 28, wherein the processing unit, when obtaining the received reference signal configuration information, is specifically configured to:

Receiving the reference signal configuration information from the positioning device through the transceiver unit;

Alternatively, the reference signal configuration information is received from the serving base station through the transceiver unit.
A device for configuring precoding, characterized in that the device comprises:

The transceiver unit is used to transmit information and signals;

The processing unit is configured to execute through the transceiver unit:

Receiving reference signal configuration information, where the reference signal configuration information includes a reference signal coherence time, and the reference signal coherence time is used to indicate the duration of sending the reference signal using the same precoding;

In one reference signal period, a reference signal sent by a communication device is received, where the reference signal is pre-coded based on the reference signal coherence time.
The apparatus of claim 30, wherein the reference signal configuration information further comprises:

The number P of symbols of the reference signal in one time slot, or the index of the symbols of the reference signal in one time slot.
The apparatus according to claim 30 or 31, wherein the reference signal configuration information further comprises:

The number of time slots that the reference signal lasts is N.
The apparatus according to claim 31 or 32, wherein the reference signal coherence time includes the number S of time units corresponding to the duration, or the reference signal coherence time includes the number of groups T of the reference signal ；

Wherein, the time unit is a time slot or a symbol.
The apparatus according to claim 33, wherein when the reference signal coherence time has a symbol granularity, the reference signal in the same time slot has the same transmission port for every S symbols;

Or, when the coherence time of the reference signal uses time slots as the granularity, within the N time slots that the reference signal lasts, the transmission port of every S time slots is the same.
The apparatus according to claim 33, wherein when the coherence time of the reference signal has a symbol granularity, the P symbols of the reference signal in a time slot include T symbol groups, and the number of symbols on each symbol group The sending port of the reference signal is the same;

Alternatively, when the coherence time of the reference signal has a time slot as the granularity, the N time slots that the reference signal lasts include T time slot groups, and the transmission port of the reference signal on each time slot group is the same.
The apparatus according to any one of claims 33 to 35, wherein when the coherence time of the reference signal has a symbol granularity, in the N time slots that the reference signal lasts, the reference signals on different time slots The signal sending port is different.
The device according to any one of claims 33 to 35, wherein when the coherence time of the reference signal is based on the time slot granularity, in the N time slots that the reference signal lasts, different in the same time slot The transmission port of the reference signal on the symbol is the same.
The apparatus according to any one of claims 30 to 37, wherein the processing unit is specifically configured to: when receiving reference signal configuration information through the transceiver unit:

Receiving the reference signal configuration information from the positioning device through the transceiving unit.
The apparatus according to any one of claims 30 to 38, wherein the processing unit, after receiving the reference signal sent by the communication device through the transceiving unit, is further configured to:

Combining the received reference signals;

Determining a measurement result according to the combined reference signal;

Reporting the measurement result to the positioning device through the transceiver unit.
The device according to claim 39, wherein the transceiver unit is further configured to:

Receiving a location request message sent by the positioning device, where the location request message is used to instruct the device to measure and report a measurement result.
A computer-readable storage medium, wherein a program or instruction is stored in the computer-readable storage medium, and the program or the instruction can realize claim 1 when read and executed by one or more processors The method according to any one of claims 10 to 20, or the program or the instruction, when read and executed by one or more processors, can implement the method according to any one of claims 10 to 20.
A computer program product, characterized in that, when the computer program product runs on a communication device, the communication device is caused to execute the method according to any one of claims 1 to 9, or the communication device is caused to execute the right Requires any of the methods from 10 to 20.
A network system, characterized by comprising a first communication device and a second communication device, wherein the first communication device is the device according to any one of claims 21-29, and the second communication device is The device of any one of claims 30-40.