CN111512664A

CN111512664A - Power measurement method and equipment

Info

Publication number: CN111512664A
Application number: CN201880083754.4A
Authority: CN
Inventors: 刘恒进; 李启明; 金哲
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-01-30
Filing date: 2018-01-30
Publication date: 2020-08-07
Anticipated expiration: 2038-01-30
Also published as: WO2019148334A1; CN111512664B

Abstract

A method of power measurement, comprising: the network equipment sends first information, wherein the first information indicates a first period, the first period is a period of change of a transmitting port of a first signal, or the first period is the least common multiple of the period of change of the transmitting port of the first signal and the period of change of an initial phase of the first signal, and the first signal is used for downlink receiving power measurement; the network equipment determines a first signal; the network device transmits a plurality of first signals through the same set of transmit ports at the same location over a plurality of first periods. By implementing the embodiment of the invention, the accuracy of downlink received power measurement can be improved.

Description

Power measurement method and equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a power measurement method and device.

Background

In a long term evolution (L TE) communication system, a terminal device may determine a received power of a reference signal through Radio Resource Control (RRC) measurement, and perform cell selection, cell reselection, power control, and the like according to the measured received power.

In a cellular-based narrowband internet of things (NB-IoT) system, a terminal device may similarly receive a plurality of Narrowband Reference Signals (NRSs), and average power of the received NRSs, and then perform cell selection, cell reselection, power control, and the like according to the measured average power. For NB-IoT systems, the measurement accuracy for the terminal device to blindly detect these NRSs is low.

Disclosure of Invention

The embodiment of the application discloses a power measurement method and equipment, which can improve the accuracy of downlink received power measurement.

In a first aspect, an embodiment of the present application provides a power measurement method, including: the network equipment transmits first information, wherein the first information indicates a first period, the first period is a period of change of a transmission port of a first signal, or the first period is a least common multiple of the period of change of the transmission port of the first signal and a period of change of an initial phase of the first signal, and the first signal is used for downlink received power measurement; the network device determining the first signal; the network device transmits a plurality of the first signals through the same set of transmit ports at the same location over a plurality of the first periods.

In the prior art, the terminal device blindly measures the NRS, which results in low measurement accuracy, and one reason for this problem is that the transmitting port used by the base station for transmitting the NRS is frequently changed. The network equipment sends first information, the first information indicates a first period, and the network equipment transmits a plurality of first signals through the same group of transmitting ports at the same position in the plurality of first periods, so that the terminal equipment can receive the plurality of first signals transmitted by the same group of transmitting ports, and the measurement precision can be ensured.

In addition, for the prior art, the carrier bandwidth in the NB-IoT system is limited, and only one Resource Block (RB) is occupied. Within a certain time duration, the base station has a limited number of NRSs (resource elements, REs) borne on time-frequency resources, and the NRSs occupy a small number of Resource Elements (REs), so that the number of RE samples for the terminal device to measure the received power is small, and the accuracy of the downlink received power measurement is low. Further, the first signal selected for the downlink received power measurement in the embodiment of the present application may be a signal occupying a larger number of REs in a time-frequency resource within a certain time, for example, an NSSS occupying a larger number of REs is selected for the downlink received power measurement in an NB-IoT system, on one hand, the number of samples for the power measurement may be increased, so that the accuracy of the downlink received power measurement may be improved. On the other hand, the physical channel may change in time domain and frequency domain, thereby affecting the accuracy of the downlink received power measurement. Compared with the prior art that REs occupied by NRS sampling are distributed on time-frequency resources in a dispersed manner, when NSSS is used for measuring the receiving power of the terminal equipment, the sampled REs are continuous REs on the time-frequency resources, so that the influence of the change of a physical channel in a time domain and a frequency domain on the receiving power measurement can be reduced, and the accuracy of the downlink receiving power measurement is further improved. On the other hand, the terminal device collects the first signals transmitted by the same group of transmitting ports according to the first period to calculate the power average value, so that the received power measurement error caused by power averaging under the condition that the transmitting ports are not in the same group can be reduced, and the accuracy of downlink received power measurement can be improved.

In one embodiment, when the first period is a least common multiple of a period of a transmission port change of the first signal and a period of an initial phase change of the first signal, the initial phase corresponding to the number of each transmission port in the same group of transmission ports is the same at the same position in a plurality of the first periods. By implementing the embodiment, the downlink received power measurement error caused by power averaging under the condition that the transmitting ports are not in the same group can be reduced, and meanwhile, when the downlink received power is superposed, the measurement error caused by the cancellation of the first signals with different initial phases when the first signals are coherently superposed can be reduced, and the accuracy of the downlink received power measurement can be further improved.

In an embodiment, the first information is information carrying a value of the first period, or the first information is information carrying the first period in a first cell and a second period in a second cell, or the first information is information carrying the first period and a first offset in the first cell, where the first offset represents a difference between the second period in the second cell and the first period in the first cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell; the second period is a period in which a transmission port of the first signal changes in the second cell, or the second period is a least common multiple of the period in which the transmission port of the first signal changes and the period in which the initial phase of the first signal changes in the second cell. By carrying the first period of the first cell and the second period in the second cell by the same information, the first period of the serving cell and the second period of the neighboring cell can be notified to the terminal device only by the network device covering the serving cell, thereby reducing the number of network devices communicating with the terminal device during the notification period. Therefore, the communication generated by the terminal equipment in the connection process of the network equipment for communication is reduced, the processing resource of the terminal equipment is saved, and the power consumption of the terminal equipment is saved. In addition, the first period of the first cell and the second period in the second cell are carried with the same information and sent to the terminal device, so that the signaling flow of the communication between the network device and the terminal device can be reduced, and the signaling overhead is saved.

In one embodiment, the method further comprises: the network equipment sends second information, wherein the second information carries information of a second period in a second cell, or the second information carries information of a first offset; the first offset represents a difference of the second period in the second cell with respect to the first period in the first cell; the second period is a period in which a transmission port of the first signal changes in the second cell, or the second period is a least common multiple of the period in which the transmission port of the first signal changes and the period in which the initial phase of the first signal changes in the second cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell. The first period of the service cell and the second period of the neighboring cell can be notified only by the network device covering the service cell, so that the number of network devices communicating with the terminal device during the notification period can be reduced, communication generated by the terminal device in a connection process of the network devices communicating with the terminal device is reduced, processing resources of the terminal device are saved, and power consumption of the terminal device is saved.

Specifically, the first offset may also be a ratio of the second period in the second cell to the first period in the first cell.

Specifically, the second information may also be information indicating whether the second period in the second cell is the same as the first period in the first cell.

In an embodiment, the first information is information carrying a codebook set, where the codebook set includes indexes of N codebooks, where the N codebooks respectively represent N groups of transmission ports and/or initial phases of the first signal; n is a positive integer greater than or equal to 1; the first period is equal to N x t, wherein t is the transmission period of the first signal; the network device transmits a plurality of the first signals through the same set of transmit ports at the same location within a plurality of the first periods, including: and the network equipment transmits a plurality of first signals through the same group of transmitting ports at the same positions in a plurality of first periods according to the codebook set.

In one embodiment, the first signal is a narrowband secondary synchronization signal NSSS. On the one hand, within a certain time duration, the terminal device can sample more REs for receiving power measurement, so that the accuracy of downlink receiving power measurement is higher. On the other hand, when NSSS is used to measure the receiving power of the terminal device, the sampled REs are continuous REs on the time-frequency resource, so that the influence of the change of the physical channel in time domain and frequency domain on the receiving power measurement can be reduced, and the accuracy of the downlink receiving power measurement can be further improved.

In a second aspect, an embodiment of the present application provides a power measurement method, including: the terminal equipment receives first information, wherein the first information indicates a first period, the first period is a period of change of a transmitting port of a first signal, or the first period is a least common multiple of the period of change of the transmitting port of the first signal and a period of change of an initial phase of the first signal, and the first signal is used for downlink receiving power measurement; the terminal equipment receives a plurality of first signals of the same group of transmitting ports at the same position in a plurality of first periods; and the terminal equipment determines the received power of the first signal according to the plurality of first signals.

By implementing the embodiment of the application, the terminal equipment can receive a plurality of first signals transmitted by the same group of transmitting ports, so that the problem of low measurement precision caused by frequent change of the transmitting ports can be solved, and the measurement precision can be ensured.

In addition, for the prior art, the carrier bandwidth in the NB-IoT system is limited, occupying only one RB. Within a certain time duration, the base station has a limited number of NRSs carried on the time-frequency resource, and the NRSs occupy a small number of REs, so that the number of RE samples for the terminal device to perform the received power measurement is small, and the accuracy of the downlink received power measurement is low. Further, the first signal selected for the downlink received power measurement in the embodiment of the present application may be a signal occupying a larger number of REs in a time-frequency resource within a certain time, for example, an NSSS occupying a larger number of REs is selected for the downlink received power measurement in an NB-IoT system, on one hand, the number of samples for the power measurement may be increased, so that the accuracy of the downlink received power measurement may be improved. On the other hand, the physical channel may change in time domain and frequency domain, thereby affecting the accuracy of the downlink received power measurement. Compared with the prior art that REs occupied by NRS sampling are distributed on time-frequency resources in a dispersed manner, when NSSS is used for measuring the receiving power of the terminal equipment, the sampled REs are continuous REs on the time-frequency resources, so that the influence of the change of a physical channel in a time domain and a frequency domain on the receiving power measurement can be reduced, and the accuracy of the downlink receiving power measurement is further improved. On the other hand, the terminal device collects the first signals transmitted by the same group of transmitting ports according to the first period to calculate the power average value, so that the received power measurement error caused by power averaging under the condition that the transmitting ports are not in the same group can be reduced, and the accuracy of downlink received power measurement can be improved.

In an embodiment, the first information is information carrying a value of the first period, or the first information is information carrying the first period in the first cell and the second period in the second cell, or the first information is information carrying the first period and a first offset in the first cell, where the first offset represents a difference between the second period in the second cell and the first period in the first cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell; the second period is a period in which a transmission port of the first signal in the second cell changes, or the second period is a least common multiple of the period in which the transmission port of the first signal in the second cell changes and the period in which the initial phase of the first signal changes.

In an embodiment, when the first information is information carrying the first period in the first cell and the second period in the second cell, or when the first information is information carrying the first period and the first offset in the first cell, after the terminal device receives the first information, the method further includes: the terminal equipment determines the value of the second period in the second cell according to the first information; the terminal device receives a plurality of first signals of the same group of transmitting ports of the second cell at the same positions in a plurality of second periods; and the terminal equipment determines the received power of the first signal in the second cell according to the plurality of first signals. By carrying the first period of the first cell and the second period in the second cell with the same information, the first period of the serving cell and the second period of the neighboring cell can be notified to the terminal device only by the network device 1 covering the serving cell, thereby reducing the number of network devices communicating with the terminal device during the notification period. Therefore, the communication generated by the terminal equipment in the connection process of the network equipment for communication is reduced, the processing resource of the terminal equipment is saved, and the power consumption of the terminal equipment is saved. In addition, the first period of the first cell and the second period in the second cell are carried with the same information and sent to the terminal device, so that the signaling flow of the communication between the network device and the terminal device can be reduced, and the signaling overhead is saved.

In one embodiment, after the terminal device receives the first information, the method further includes: the terminal equipment determines a value of a first period according to the first information; the terminal equipment receives a plurality of first signals of the same group of transmitting ports at the same position in a plurality of first periods, and the method comprises the following steps: the terminal equipment receives a plurality of first signals of the same group of transmitting ports of the first cell at the same position in a plurality of first periods; the terminal equipment determines the receiving power of the first signal according to the plurality of first signals, and comprises the following steps: and the terminal equipment determines the received power of the first signal in the second cell according to the plurality of first signals.

In one embodiment, the method further comprises: the terminal equipment receives second information, wherein the second information carries information of the second period in a second cell, or the second information carries information of a first offset; the first offset represents a difference of the second period in the second cell with respect to the first period in the first cell; the second period is a period in which a transmission port of the first signal changes in the second cell, or the second period is a least common multiple of the period in which the transmission port of the first signal changes and the period in which the initial phase of the first signal changes in the second cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell; the terminal equipment receives a plurality of first signals of the same group of transmitting ports of the second cell at the same positions in a plurality of second periods according to the second periods; and the terminal equipment determines the received power of the first signal in the second cell according to the plurality of first signals. The first period of the service cell and the second period of the neighboring cell can be notified only by the network device covering the service cell, so that the number of network devices communicating with the terminal device during the notification period can be reduced, communication generated by the terminal device in a connection process of the network devices communicating with the terminal device is reduced, processing resources of the terminal device are saved, and power consumption of the terminal device is saved.

In an embodiment, the first information is information carrying a codebook set, where the codebook set includes indexes of N codebooks, where the N codebooks respectively represent N groups of transmission ports and/or initial phases of the first signal; n is a positive integer greater than or equal to 1; after the terminal device receives the first information, the method further includes: and the terminal equipment determines the first period according to the number N of the indexes of the codebook in the codebook set, wherein the first period is equal to N x t, and t is the transmission period of the first signal.

In one embodiment, the method further comprises: the terminal equipment receives a plurality of first signals represented by indexes of a first codebook in a plurality of first periods; the index of the first codebook is an index of a codebook associated with a plurality of the first signals. In the first period, the terminal device may receive a first signal represented by an index of the same codebook according to the codebook set. The number of the received first signals can be increased, and the number of REs for which the terminal device samples to perform the received power measurement is increased, so that the accuracy of the downlink received power measurement can be improved.

In a third aspect, an embodiment of the present application provides a network device, including a processor and a memory, where the memory is configured to store program instructions, and the processor is configured to invoke the program instructions to execute the power measurement method provided in the first aspect or any possible embodiment of the first aspect.

In a fourth aspect, an embodiment of the present application provides a communication device, including a processor and a memory, where the memory is configured to store program instructions, and the processor is configured to call the program instructions to execute the power measurement method provided in the second aspect or any possible embodiment of the second aspect.

In a fifth aspect, an embodiment of the present application provides a network device, where the network device includes a module or a unit configured to perform the power measurement method provided in the first aspect or any possible embodiment of the first aspect.

In a sixth aspect, an embodiment of the present application provides a communication device, which includes a module or a unit configured to perform the power measurement method provided in the second aspect or any possible embodiment of the second aspect.

In a seventh aspect, an embodiment of the present invention provides a chip system, where the chip system includes at least one processor, a memory, and an interface circuit, where the memory, the interface circuit, and the at least one processor are interconnected by a line, and the at least one memory stores program instructions; the program instructions, when executed by the processor, implement the method as described in the first aspect or any one of the possible embodiments of the first aspect.

In an eighth aspect, an embodiment of the present invention provides a chip system, where the chip system includes at least one processor, a memory, and an interface circuit, where the memory, the interface circuit, and the at least one processor are interconnected by a line, and the at least one memory stores program instructions; which when executed by the processor, performs the method described in the second aspect or any of the possible embodiments of the second aspect.

In a ninth aspect, an embodiment of the present invention provides a computer-readable storage medium, in which program instructions are stored, and when the program instructions are executed by a processor, the method described in the first aspect or any possible embodiment of the first aspect is implemented.

In a tenth aspect, an embodiment of the present invention provides a computer-readable storage medium, in which program instructions are stored, and when the program instructions are executed by a processor, the method described in the second aspect or any of the possible embodiments of the second aspect is implemented.

In an eleventh aspect, embodiments of the present invention provide a computer program product for implementing the method described in the first aspect or any of the possible embodiments of the first aspect when the computer program product is run on a processor.

In a twelfth aspect, embodiments of the present invention provide a computer program product for implementing the method described in the second aspect or any of the possible embodiments of the second aspect when the computer program product is run on a processor.

In a thirteenth aspect, an embodiment of the present invention provides a power measurement system, including: network equipment and terminal equipment, wherein: the network device establishes a communication connection with the terminal device, and the network device is configured to perform the power measurement method provided by the first aspect or any possible embodiment of the first aspect; the terminal device is configured to perform the power measurement method provided by the second aspect or any possible embodiment of the second aspect.

In particular, the network device may be the network device described in the third aspect or the fifth aspect. The terminal device may be the terminal device described in the fourth or sixth aspect.

Drawings

The drawings used in the embodiments of the present application are described below.

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

fig. 2 is a schematic structural diagram of a terminal device 10 provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a network device 20 according to an embodiment of the present application;

fig. 4 is a schematic diagram of a downlink received power measurement principle provided in an embodiment of the present application;

fig. 5 is a schematic flowchart of a power measurement method provided in an embodiment of the present application;

FIG. 6 is a schematic diagram of a first cycle provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of another first cycle provided by an embodiment of the present application;

FIG. 8 is a diagram illustrating a relationship between a codebook set and a first period according to an embodiment of the present application;

FIG. 9 is a schematic flow chart diagram illustrating another power measurement method provided by an embodiment of the present application;

FIG. 10 is a schematic flow chart diagram illustrating another power measurement method provided by an embodiment of the present application;

fig. 11 is a schematic structural diagram of another network device 20 provided in the embodiment of the present application;

fig. 12 is a schematic structural diagram of another terminal device 10 provided in an embodiment of the present application.

Detailed Description

The embodiments of the present invention will be described below with reference to the drawings. The terminology used in the description of the embodiments herein is for the purpose of describing particular embodiments herein only and is not intended to be limiting of the application.

Referring to fig. 1, fig. 1 is a schematic diagram of a network system 100, which may be L TE communication system, specifically, NB-IoT system, or a global system for mobile communications (GSM) communication system, a mobile communication system (UMTS), a Code Division Multiple Access (CDMA) system, a L TE communication system, a fifth Generation mobile communication system (5-Generation, 5G) or a new network system that appears in the future, which is not limited to this, according to an embodiment of the present invention, which is described by taking the IoT-IoT system as an example, and it is understood that the embodiment of the present invention may also be extended to other communication systems.

As shown in fig. 1, the network system 100 includes: a first device 10 and a second device 20. The first device 10 and the second device 20 may establish a communication connection, and perform data interaction through the communication connection. In the embodiment of the present application, a first device 10 is taken as a terminal device, and a second device 20 is taken as a network device. It can be understood that the present embodiment may also be extended to a case where the first device 10 is a network device and the second device 20 is a network device, and the present embodiment may still be extended to a case where the first device 10 is a terminal device and the second device 20 is a terminal device, and the present embodiment may also be extended to a case where the first device 10 is a network device and the second device 20 is a terminal device. The embodiment of the present application does not limit this.

The terminal device 10 may be a mobile User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a user terminal, or a user agent the access terminal may be a cellular phone, a handheld device with wireless communication capability, a computing device or a vehicle-mounted device, a wearable device, a terminal in a 5G system, or a terminal in a future-evolved public land mobile network (P L MN) or the like.

The network device 20 may be a base station, which may be configured to communicate with one or more terminal devices 20, and may also be configured to communicate with one or more base stations having a function of partial terminal devices (e.g., communication between a macro base station and a micro base station, such as an access point) — the base station may be a Base Transceiver Station (BTS) in a time division synchronous code division multiple access (TD-SCDMA) system, or an evolved node B (eNB) in an L TE system, or a base station in a fifth Generation (5th-Generation, 5G) mobile communication system, a New Radio (NR) system.

In communication system 100, the area covered by network device 20 or the area covered by one or more sector antennas on network device 20 may be referred to as a cell. In this area, as shown in fig. 1, the terminal device 10 can communicate with the network device 20 through a wireless channel. The cell in which terminal device 10 communicates with network device 20 may be referred to as the serving cell for terminal device 10. In general, the serving cell of the terminal device 10 may be adjacent to a plurality of neighbor cells. Terminal device 10 often needs to continuously perform RRM measurements to implement cell selection, cell reselection, power control, etc. to perform radio resource control reasonably. The cell selection refers to the terminal device 10 selecting a suitable cell to camp on. Cell reselection refers to the terminal device 10 selecting a better serving cell than the current serving cell. The power control mainly means that the terminal device 10 controls the uplink transmission power to ensure the quality of the uplink data transmitted by the terminal device 10 and reduce the interference to other terminal devices in the communication system 100 as much as possible.

As shown in fig. 1, terminal device 10 may communicate with network device 20 within a serving cell covered by network device 20, and terminal device 10 may perform received power measurement on the serving cell covered by network device 20. The terminal device 10 may also measure the received power of the cell neighboring cell a and the neighboring cell B adjacent to the serving cell. In this embodiment of the present application, the neighboring cell a and the neighboring cell B may be covered by a network device different from the network device 20, for example, the neighboring cell a is covered by the network device 21 (not shown in fig. 1), the neighboring cell B is covered by the network device 22 (not shown in fig. 1), and the network device 20, the network device 21, and the network device 22 are all different network devices. In addition, along with the evolution of the network system, in the embodiment of the present application, the neighboring cell a, the neighboring cell B, and the serving cell may also be cells covered by the network device 20, which is not limited in the embodiment of the present application.

The embodiment of the present application does not limit the specific technologies and the specific device forms adopted by the terminal device 10 and the network device 20. The network system shown in fig. 1 is only for more clearly illustrating the technical solution of the embodiment of the present application, and does not constitute a limitation to the embodiment of the present application, and it is known by those skilled in the art that the technical solution provided in the embodiment of the present application is also applicable to similar technical problems with the evolution of the network system and the appearance of new service scenarios. It is understood that the present application is also applicable to similar service scenarios, and the embodiments of the present application do not limit this.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a terminal device 10 according to an embodiment of the present application. As shown in fig. 2, the terminal device 10 may include: one or more terminal processors 201, memory 202, communication interface 203, receiver 205, transmitter 206, coupler 207, antenna 208, user interface 209, and input-output modules (including audio input-output module 210, key input module 211, and display 212, among others). These components may be connected by a bus 204 or otherwise, as illustrated in FIG. 2 by a bus connection. Wherein:

communication interface 203 may be used for terminal device 10 to communicate with other communication devices, such as network devices, in particular, network devices 20 shown in fig. 3, in particular, communication interface 203 may be a long term evolution (L TE) (4G) communication interface, or may be a communication interface of 5G or a future new air interface, not limited to a wireless communication interface, terminal device 10 may also be configured with a wired communication interface 203, such as a local access network (L AN) interface.

Transmitter 206 may be used to perform transmit processing, e.g., signal modulation, on the signal output by terminal processor 201. The receiver 205 may be used for performing receive processing, such as signal demodulation, on the mobile communication signal received by the antenna 208. In some embodiments of the present application, the transmitter 206 and the receiver 205 may be considered as one wireless modem. In the terminal device 10, the number of the transmitters 206 and the receivers 205 may be one or more. The antenna 208 may be used to convert electromagnetic energy in the transmission line to electromagnetic energy in free space, or vice versa. The coupler 207 is used to divide the mobile communication signal received by the antenna 208 into a plurality of paths and distribute the plurality of paths to the plurality of receivers 205.

In addition to the transmitter 206 and receiver 205 shown in fig. 2, the terminal device 10 may also include other communication components, such as a GPS module, a bluetooth (bluetooth) module, a wireless fidelity (Wi-Fi) module, etc. without being limited to the wireless communication signals expressed above, the terminal device 10 may also support other wireless communication signals, such as satellite signals, short wave signals, etc. without being limited to wireless communication, the terminal device 10 may also be configured with a wired network interface (such as a L AN interface) to support wired communication.

The input and output module may be used to enable interaction between the terminal device 10 and a user/external environment, and may mainly include an audio input and output module 210, a key input module 211, a display 212, and the like. Specifically, the input/output module may further include: cameras, touch screens, sensors, and the like. Wherein the input and output modules are in communication with the terminal processor 201 through the user interface 209.

The memory 202 may further store a network communications program operable to communicate with one or more additional devices, one or more terminal devices, and one or more network devices, the memory 202 may further store a user interface program operable to visually display the contents of the application via a graphical user interface and receive user control of the application via menus, dialog boxes, buttons, and other input controls.

In some embodiments of the present application, the memory 202 may be used to store an implementation program of the power measurement method provided by one or more embodiments of the present application on the terminal device 10 side. For the implementation of the power measurement method provided in one or more embodiments of the present application, please refer to the following embodiments.

The terminal processor 201 is operable to read and execute computer readable instructions. Specifically, the terminal processor 201 may be configured to call a program stored in the memory 212, for example, an implementation program of the power measurement method provided in one or more embodiments of the present application on the terminal device 10 side, and execute instructions contained in the program.

It is understood that the terminal device 10 may be the terminal device 10 in the communication system 100 shown in fig. 1, and may be implemented as a mobile device, a mobile station (mobile station), a mobile unit (mobile unit), a wireless unit, a remote unit, a user agent, a mobile client, or the like.

It should be noted that the terminal device 10 shown in fig. 2 is only one implementation manner of the embodiment of the present application, and in practical applications, the terminal device 10 may also include more or less components, which is not limited herein.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a network device 20 according to an embodiment of the present application. As shown in fig. 3, the network device 20 may include: one or more network device processors 301, memory 302, communication interface 303, transmitter 305, receiver 306, coupler 307, and antenna 308. These components may be connected by a bus 304, or otherwise, as illustrated in FIG. 3 by way of example. Wherein:

the communication interface 303 may be used for the network device 20 to communicate with other communication devices, such as a terminal device or other network devices, specifically, the terminal device may be the terminal device 10 shown in fig. 2, specifically, the communication interface 303 may be a long term evolution (L TE) (4G) communication interface, or may be a communication interface of a 5G or future new air interface, not limited to a wireless communication interface, the network device 20 may also be configured with a wired communication interface 303 to support wired communication, for example, a backhaul link between the network device 20 and other network devices 20 may be a wired communication connection.

Transmitter 305 may be used to perform transmit processing, e.g., signal modulation, on the signal output by network device processor 301. Receiver 306 may be used for receive processing of mobile communication signals received by antenna 308. Such as signal demodulation. In some embodiments of the present application, the transmitter 305 and the receiver 306 may be considered as one wireless modem. In the network device 20, the number of the transmitters 305 and the receivers 306 may be one or more. The antenna 308 may be used to convert electromagnetic energy in the transmission line to electromagnetic energy in free space or vice versa. Coupler 307 may be used to multiplex the mobile communications signal to a plurality of receivers 306.

The memory 302 may include, in particular, a high-speed random access memory and may also include a non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state storage devices, the memory 302 may store an operating system (hereinafter referred to as a system) such as an embedded operating system (hereinafter referred to as a uCOS, VxWorks, RT L inux, etc., the memory 302 may also store a network communication program that may be used to communicate with one or more additional devices, one or more end devices, one or more network devices.

Network device processor 301 may be configured to perform radio channel management, implement call and communication link setup and teardown, provide cell switching control for users within the control area, and the like. Specifically, the network device processor 301 may include: an administration/communication module (AM/CM) (a center for voice channel exchange and information exchange), a Basic Module (BM) (for performing call processing, signaling processing, radio resource management, management of radio links, and circuit maintenance functions), a code conversion and sub-multiplexing unit (TCSM) (for performing multiplexing/demultiplexing and code conversion functions), and so on.

In embodiments of the present application, the network device processor 301 may be configured to read and execute computer readable instructions. Specifically, the network device processor 301 may be configured to call a program stored in the memory 302, for example, an implementation program of the power measurement method provided in one or more embodiments of the present application on the network device 20 side, and execute instructions contained in the program.

It is understood that the network device 20 may be the network device 20 in the communication system 100 shown in fig. 1, and may be implemented as a base transceiver station, a wireless transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a NodeB, an eNodeB, an access point or a TRP, etc.

It should be noted that the network device 20 shown in fig. 3 is only one implementation manner of the embodiment of the present application, and in practical applications, the network device 20 may also include more or less components, which is not limited herein.

In the NB-IoT system, the downlink received power measurement in the RRM measurement is mainly a measurement of the Narrowband Reference Signal Received Power (NRSRP) by the terminal device 10 based on the NRS. The basic principle of NRSRP measurement is: the terminal device 10 collects the received powers of a plurality of NRS signals from the time-frequency resource, and calculates the average of the received powers of the obtained NRS signals, to obtain the NRSRP value.

In the prior art, the terminal device blindly measures the NRS, which results in low measurement accuracy, and one reason for this problem is that the transmitting port used by the base station for transmitting the NRS is frequently changed.

Based on the above-mentioned architecture diagram of the network system shown in fig. 1, the embodiment of the present application provides a power measurement method, which can improve the accuracy of downlink received power measurement.

The embodiment of the application can comprise: the network device may send information indicating the first period to the terminal device. The first period may be a period in which the transmission ports of the first signal vary, and the terminal device may receive the first signals transmitted by the same group of transmission ports at the same position of the plurality of first periods and may average the power of the received first signals. By implementing the embodiment of the application, the terminal equipment can receive a plurality of first signals transmitted by the same group of transmitting ports, so that the problem of low measurement precision caused by frequent change of the transmitting ports can be solved, and the measurement precision can be ensured.

In addition, for the prior art, the carrier bandwidth in the NB-IoT system is limited, occupying only one RB. Within a certain time duration, the base station has a limited number of NRSs carried on the time-frequency resource, and the NRSs occupy a small number of REs, so that the number of RE samples for the terminal device to perform the received power measurement is small, and the accuracy of the downlink received power measurement is low. Further, the first signal selected for the downlink received power measurement in the embodiment of the present application may be a signal occupying a larger number of REs in a time-frequency resource within a certain time, for example, a Narrowband Secondary Synchronization Signal (NSSS) occupying a larger number of REs is selected for the downlink received power measurement in an NB-IoT system, and on one hand, the number of samples for the power measurement may be increased, so that the accuracy of the downlink received power measurement may be improved. On the other hand, the physical channel may change in time domain and frequency domain, thereby affecting the accuracy of the downlink received power measurement. Compared with the prior art that REs occupied by NRS sampling are distributed on time-frequency resources in a dispersed manner, when NSSS is used for measuring the receiving power of the terminal equipment, the sampled REs are continuous REs on the time-frequency resources, so that the influence of the change of a physical channel in a time domain and a frequency domain on the receiving power measurement can be reduced, and the accuracy of the downlink receiving power measurement is further improved. On the other hand, the terminal device collects the first signals transmitted by the same group of transmitting ports according to the first period to calculate the power average value, so that the received power measurement error caused by power averaging under the condition that the transmitting ports are not in the same group can be reduced, and the accuracy of downlink received power measurement can be improved.

The first period may also be the least common multiple of the period of the change of the transmission port of the first signal and the period of the initial phase change of the first signal, and the terminal device may receive the first signals transmitted by the same group of transmission ports at the same position of the plurality of first periods.

Correspondingly, for the case that the first period is the least common multiple, at the same position in a plurality of the first periods, the initial phase corresponding to the number of each transmission port in the same group of transmission ports is the same, that is, for each transmission port in the same group of transmission ports, the initial phases of the first signals transmitted by the same transmission port in the plurality of first periods are the same. Therefore, the downlink received power measurement error caused by power averaging under the condition that the transmitting ports are not in the same group can be reduced, the measurement error caused by the cancellation of the first signals with different initial phases during the coherent superposition when the lower received power is superposed can be reduced, and the accuracy of the downlink received power measurement can be further improved.

The group of transmitting ports refers to one or more transmitting ports which transmit the first signal simultaneously in a first signal transmitting period. The set of transmitting ports corresponding to one transmitting period may be the same as or different from the set of transmitting ports corresponding to another transmitting period, or may be partially the same. In a first signal transmission period, one or more transmission ports that transmit a first signal at the same time may also be referred to as a transmission port group corresponding to the transmission period. The same group of transmitting ports means that one or more transmitting ports for transmitting the first signals are completely the same in port number in a plurality of first signal transmitting periods. For example, in one transmission cycle, the transmission ports for transmitting the first signal are port 1 and port 2, and in another transmission cycle, the transmission ports for transmitting the first signal are also port 1 and port 2, and in these two transmission cycles, it can be said that the first signals are transmitted by the same group of transmission ports.

The set of transmitting ports may be all ports of the network device for transmitting the first signal, or may be one or more of all ports. For example, all ports of the network device that perform the first signal transmission are port 1, port 2, and port 3. The set of transmit ports may be port 1 and port 2, i.e. during a transmit period of a first signal, port 1 and port 2 transmit the first signal simultaneously. If the transmission ports for transmitting the first signals are port 1 and port 2 in the transmission period of one first signal, and the transmission ports for transmitting the first signals are also port 1 and port 2 in the transmission period of another first signal, it can be said that the first signals are transmitted from the same group of transmission ports in the transmission periods of the two first signals.

In a group of transmitting ports corresponding to one transmitting period, all transmitting ports occupy the same time-frequency resources when transmitting the first signal to the terminal equipment, and when the terminal equipment receives the first signal on the same time-frequency resources, the terminal equipment receives the fusion signal of the first signal respectively transmitted by each transmitting port. The fused signal may be a signal strength superposition taking phase into account. When only one transmitting port is arranged in the group of transmitting ports, the first signal received by the terminal equipment and transmitted by the group of transmitting ports is the first signal transmitted by the transmitting port. When a group of transmitting ports comprises a plurality of transmitting ports, the first signal received by the terminal equipment and transmitted by the group of transmitting ports is the superposition of the first signals transmitted by the plurality of transmitting ports respectively.

For example, please refer to fig. 4, fig. 4 is a schematic diagram illustrating a downlink received power measurement principle according to an embodiment of the present application. As shown in fig. 4, the terminal device may use NSSS for the measurement of the received power. The transmission period of NSSS is 20ms, and the time domain resource occupied by NSSS is 1 subframe, i.e. 1ms, in the transmission period. That is, every 20ms, the terminal device may sample the received power of the signal on the time-frequency resource corresponding to the duration of 1ms, so as to perform received power measurement. As shown in fig. 4, the prior art provides a scheme 2, which uses NRS for terminal device received power measurement, and only 8 REs in one subframe carry NRS signals ("R" shown in fig. 4), and the NRS signals do not occupy REs in each subframe, specifically, as shown in fig. 4, 8 REs occupied by NRS signals are in each subframe in subframe 1 and subframe 3, and the NRS signals do not occupy REs in subframe 2. Compared with the prior art scheme 2, in the scheme 1 provided by the embodiment of the present application, within a certain time duration (for example, within 10 s), the number of REs that can be sampled by the terminal device to perform the received power measurement is greater, so that the accuracy of the downlink received power measurement is higher.

On the other hand, the physical channel may change in time domain and frequency domain, thereby affecting the accuracy of the downlink received power measurement. Compared with the prior art that REs occupied by NRS sampling are distributed on time-frequency resources in a dispersed manner, when NSSS is used for measuring the receiving power of the terminal equipment, the sampled REs are continuous REs on the time-frequency resources, so that the influence of the change of a physical channel in time domain and frequency domain on the receiving power measurement can be reduced, and the accuracy of the downlink receiving power measurement is further improved.

On the other hand, since the group of the transmit ports of the NSSS is periodically changed according to the first period, in order to reduce a receive power measurement error caused by averaging the receive power of the terminal device when the transmit ports from which the first signal received by the terminal device comes are not in the same group, the network device may notify the terminal device of the first period of the NSSS. As shown in fig. 4, in the network device, the transmit port group of the NSSS is periodically changed according to 40ms, so the network device can notify the terminal device that the first period is 40 ms. Specifically, during the first NSSS transmission period of the first period 40ms, the set of transmit ports used by the network device includes only port 1, and during the second NSSS transmission period of the first period 40ms, the set of transmit ports used by the network device includes both port 1 and port 2. The terminal equipment can receive the NSSS transmitted by the same group of transmitting ports at the same positions of a plurality of first periods, can reduce the receiving power measurement error caused by the average receiving power under the condition that the received first signals come from different groups of transmitting ports, and further improves the accuracy of downlink receiving power measurement.

Specifically, as shown in fig. 4, the terminal device receives NSSS transmitted by port 1 and port 2 simultaneously in the second transmission period of NSSS in the first period, receives NSSS transmitted by port 1 and port 2 simultaneously at the same position (in the second transmission period of NSSS) in the second first period as in the first period, and both NSSS received by the terminal device in the two first periods are NSSS transmitted by port 1 and port 2 simultaneously. NSSS received in the same position in the third first cycle as in the first two first cycles are also from port 1 and port 2, and so on. So that NSSS received by the end device are all from the same set of transmit ports.

The examples are only for the purpose of illustrating embodiments of the present application and should not be construed as limiting. In the embodiment of the present application, the first signal is NSSS as an example, and it can be understood that in an NB-IoT system, the first signal may also be another signal sent by a network device. In addition, as the communication system evolves, the first signal may also be a signal used by a terminal device in a communication system that newly appears in the future for performing received power measurement, which is not limited in this embodiment of the present application.

Several examples provided herein are described below.

Referring to fig. 5, fig. 5 is a schematic flow chart illustrating a power measurement method according to an embodiment of the present disclosure. In the embodiment described in fig. 5, the terminal device may measure the received power in the cell covered by the network device, where the cell covered by the network device may be a serving cell or a neighboring cell of the serving cell. As shown in FIG. 5, the power measurement method includes, but is not limited to, the following steps S101-S404.

S101, the network equipment sends first information to the terminal equipment.

Wherein the first information indicates the first period. The first information may be sent to the terminal device in a high-level signaling manner, and the first information may also be identified by a certain field, which is not limited in this embodiment of the present application.

S102, the network equipment transmits a plurality of first signals through the same group of transmitting ports at the same positions in a plurality of first periods.

S103, the terminal equipment receives a plurality of first signals transmitted by the same group of transmitting ports, and the received power of the first signals is determined according to the plurality of first signals.

Wherein, the first period may be a period in which the transmission port group of the first signal changes, for example, as shown in fig. 4, the first period is two transmission port groups: the varied periods of the transmit port group 1 (transmit port 1) and the transmit port group 2 (transmit port 1 and transmit port 2) according to which the terminal device receives the first signal from the same group of transmit ports at the same position of the plurality of first periods. The terminal device performs power averaging on the first signals transmitted by the same group of transmission ports, which may be to calculate the power of each first signal and then average the powers of all the first signals. Each group of the transmitting ports may include one transmitting port or may include a plurality of transmitting ports. The group of transmitting ports may include one or more transmitting ports that simultaneously transmit the first signal in one first signal transmitting period, and for specific explanation, reference may be made to the foregoing description of the group of transmitting ports, which is not described herein again. As shown in fig. 4, port 1 may be referred to as a set of transmit ports during a first NSSS transmit cycle of a first cycle, and port 1 and port 2 may also be referred to as another set of transmit ports during a second NSSS transmit cycle of the first cycle.

In addition, in one possible embodiment of the present application, the first period may also be a period describing a change in the transmission port group of the first signal and a change in the initial phase of the first signal at the same time. That is, the first signals transmitted by the network device at the same positions of the plurality of first periods come from the same group of transmission ports, and the initial phases of the first signals transmitted at the same positions of the plurality of first periods are the same for the first signals transmitted by each transmission port in the same group of transmission ports.

For example, please refer to fig. 6, fig. 6 is a schematic diagram of a first period according to an embodiment of the present application. As shown in fig. 6, the change of the transmit port group of NSSS is periodically changed according to the repetition rule of port 1 and port 2. The initial phase of the NSSS is periodically varied according to a repeating rule of-90 degrees, 0 degrees, and 90 degrees. The first period is a period describing both a change in the transmit port group of NSSS and a change in the initial phase of NSSS. The period of variation T1 of the NSSS transmit port group is 2 times the transmit period, and the period of variation T2 of the initial phase of the NSSS is 3 times the transmit period. The first period of NSSS may be the least common multiple of the period of change T1 of the NSSS transmit port group and the period of change T2 of the initial phase of NSSS, which is 6 times the transmit period of NSSS.

The first period in which the terminal device receives NSSS may also be other common multiples of T1 and T2, for example, 12 times the NSSS transmission period. Or the terminal device does not receive NSSS from the same group of transmission ports in the first period of each NSSS, the NSSS may be received at the same position in the first period after a plurality of first periods, and the terminal device does not receive NSSS in the first period. Reducing the amount of NSSS received may save signaling overhead and power consumption of the terminal device.

The terminal equipment receives first signals from the same group of transmitting ports at the same positions in the plurality of first periods, and the initial phase corresponding to the number of each transmitting port in the same group of transmitting ports is the same at the same position in the plurality of first periods. The terminal device may represent the received power measured by the terminal device by receiving a received power for each of a plurality of first signals received at different first periods and averaging the received powers. In addition, the terminal device may superimpose the first signals received in different first periods according to the phases, and then obtain the power of the superimposed signals to represent the received power measured by the terminal device. The process of obtaining the power of each of the plurality of first signals received in different first periods and then adding the power is called non-coherent addition, and the process of obtaining the power by adding each of the first signals according to the phase is called coherent addition.

In the case that the terminal device uses coherent superposition to average the received power, the first period describes periods of the change of the transmission port of the first signal and the change of the initial phase of the first signal at the same time, and the first signals received by the terminal device at the same position of the plurality of first periods not only come from the same group of transmission ports, but also the initial phase corresponding to the number of each transmission port in the same group of transmission ports is the same at the same position in the plurality of first periods. The method can reduce the received power measurement error caused by power averaging under the condition that the transmitting ports are not in the same group, and can reduce the measurement error caused by the cancellation of the first signals in different initial phases during the coherent superposition during the calculation of the received power, thereby further improving the accuracy of the downlink received power measurement.

For example, in the previous example, as shown in fig. 6, the terminal device receives the first signal in the first transmission period during the first period T. The group of transmit ports from which the first signal came is transmit port 1 and the initial phase of the first signal is-90 degrees. The same position in the second first period T, i.e. the group of transmit ports from which the first signal received in the first transmit period in the second first period T is also transmit port 1, and the initial phase is-90 degrees. When the terminal device uses coherent superposition to calculate the received power, the first signals are all from the transmitting port 1, and the initial phases of the first signals are all-90 degrees, so that the phenomenon of signal cancellation with different phases can not occur during coherent superposition, the received power measurement error caused by power averaging under the condition that the transmitting ports are not in the same group is reduced, meanwhile, the measurement error caused by cancellation during coherent superposition is reduced, and the accuracy of downlink received power measurement can be further improved.

For another example, please refer to fig. 7, fig. 7 is a schematic diagram of another first period according to an embodiment of the present application. As shown in fig. 7, the terminal device receives a first signal in a first transmission period during a first period T. The first signal is from the superposition of the first signals transmitted by the transmitting port 1 and the transmitting port 2 respectively. And the initial phase of the first signal from the transmission port 1 is 0 degree and the initial phase of the first signal from the transmission port 2 is 90 degrees. The first signal received in the first transmission cycle during the second first period T is also from both transmission port 1 and transmission port 2 at the same time. And the initial phase of the first signal from transmit port 1 is also 0 degrees and the initial phase of the first signal from transmit port 2 is also 90 degrees. Then when the terminal device uses coherent superposition to perform the received power calculation, the first signals are all from the same group of transmission ports simultaneously: the initial phases of the first signals from the transmitting port 1 are both 0 degree, and the initial phases of the first signals from the transmitting port 2 are both 90 degrees, so that the received power measurement error caused by power averaging under the condition that the transmitting ports are not in the same group is reduced, the accuracy of downlink received power measurement is improved, meanwhile, the measurement error caused by signal cancellation generated by the different initial phases of the first signals when coherent superposition is carried out is reduced, and the accuracy of downlink received power measurement can be further improved.

In another possible embodiment of the present application, the first information may be a value directly explicitly indicating the first period. For example, the first period of the first signal that the network device informs the terminal device is 60 ms.

The first information may also be sent to the terminal device in the form of a set of codebooks. The network device transmits a plurality of the first signals through the same group of transmitting ports at the same position in a plurality of first periods, and comprises: the network device transmits a plurality of first signals through the same set of transmit ports at the same positions within a plurality of first periods according to the codebook set. And after receiving the first information, the terminal equipment determines a first period according to the codebook set.

Wherein the codebook set comprises indexes of N codebooks, and the N codebooks represent N groups of transmitting ports and/or initial phases of the first signal; n is a positive integer greater than or equal to 1; the first period is equal to N x t, where t is a transmission period of the first signal.

Specifically, please refer to table 1, where table 1 is an example of a codebook and an index of the codebook provided in the embodiment of the present application. The number of rows in each codebook represents the number of transmit ports, and the value in the matrix represented by the codebook, which may be any one of the sets {0, 1, -1, j, -j }, represents the initial phase of the first signal transmitted by the transmit ports. Wherein 0 indicates that the first signal of the transmitting port is not transmitted, 1 indicates that the initial phase of the first signal of the transmitting port is 0 degree, 1 indicates that the initial phase of the first signal of the transmitting port is 180 degrees, j indicates that the initial phase of the first signal of the transmitting port is 90 degrees, and-j indicates that the initial phase of the first signal of the transmitting port is-90 degrees.

Table 1 shows an index of a codebook and an example of the codebook provided in the embodiments of the present application

As shown in table 1, the codebooks are all matrices of 2 rows and 1 columns, and the number of the transmission ports is two, and it is assumed that the codebooks are respectively numbered as transmission port 1 and transmission port 2. The codebook represented by index 0 of the codebook is

It means that the first signal is transmitted using only the transmission port 1 during a transmission period of the first signal, and the initial phase of the first signal has a value of 0 degree. The codebook represented by index 1 of the codebook is

Indicating that the first signal is transmitted using only the transmission port 2 during a transmission period of the first signal, and the initial phase of the first signal has a value of 90 degrees. The codebook represented by index 2 of the codebook is

It is shown that in a transmission period of a first signal, the first signal is transmitted by using the transmission port 1 and the transmission port 2, and the initial phase of the first signal of the transmission port 1 has a value of 0 degree, and the initial phase of the first signal of the transmission port 2 has a value of 90 degrees.

If the codebook set of the network device is {0, 1, 2, 0}, this indicates that the network device repeatedly transmits the first signal according to {0, 1, 2, 0} in time, i.e., transmits the first signal according to {0, 1, 2, 0} … …. Specifically, please refer to fig. 8, fig. 8 is a schematic diagram illustrating a relationship between a codebook set and a first period according to an embodiment of the present application. As shown in fig. 8, the index of each codebook may represent a transmission period of the first signal, in which the first signal transmitted by the network device is transmitted according to the initial phase and the transmission port of the codebook indicated by the index of the codebook. It can also be said that the index of each codebook represents a first signal, and the transmission port and the initial phase of the first signal are the transmission port and the initial phase indicated by the index of the codebook. For example, the index of the first codebook in the codebook set is 0, the index of the codebook indicates a transmission period of the first signal, in which the first signal transmitted by the network device comes from the transmission port 1, and the initial phase is 0. The indices of the 5 codebooks in the codebook set indicate that the first period of the first signal is 5 times the transmission period. The transmission period of the first signal may be predefined by a protocol, for example, 20ms, or may be signaled by the network device to the terminal device.

When the first information is information carrying a codebook set, the network device may send the codebook set to the terminal device, and before step S102, the terminal device may determine the first period of the first signal according to the number of indexes of the codebook in the codebook set and the transmission period of the first signal. For example, in the previous example, the terminal device receives the codebook set 01120 sent by the network device, and determines that the first period of the first signal is 20ms × 5 — 100ms according to the number 5 of the indices of the codebooks in the codebook set and the transmission period 20ms of the first signal predefined by the protocol.

In the embodiment of the present application, the values of the initial phase of the first signal transmitted by the transmitting port are, for example, -90 degrees, 0 degrees, 90 degrees, and 180 degrees, and the initial phase is not limited to the above initial phase value in an actual communication system, and may be an initial phase with any value, which is not limited in the embodiment of the present application.

In the embodiment of the present application, an index of each codebook in the codebook set indicates a transmit port group and an initial phase of the first signal, and it can be understood that the index of each codebook in the codebook set may also indicate a transmit port group of the first signal, where the first period is a period in which the transmit port of the first signal changes. Referring to table 2, table 2 shows another example of a codebook and an index of the codebook according to the embodiment of the present application. The value in the matrix of the codebook representation, which may be any one of the sets 0, 1, represents whether the first signal transmitted using the transmit port is used. Wherein, 0 indicates that the first signal of the transmitting port is not transmitted, and 1 indicates that the first signal of the transmitting port is transmitted.

As shown in table 2, the codebooks are all matrices of 2 rows and 1 columns, and the number of the transmit ports is two, and it is assumed that the numbers of the two transmit ports are transmit port 1 and transmit port 2, respectively. The codebook represented by index 0 of the codebook is

Indicating that the first signal is transmitted using only transmit port 1 during a transmit period of the first signal. The codebook represented by index 1 of the codebook is

Indicating that the first signal is transmitted using only transmit port 2 during a transmit period of the first signal. The codebook represented by index 2 of the codebook is

Indicating that the first signal is transmitted using transmit port 1 and transmit port 2 simultaneously during a transmit period of the first signal.

In another possible embodiment of the present application, during a first period T, a terminal device may receive a plurality of first signals represented by indexes of a first codebook; the index of the first codebook is an index of a codebook associated with the plurality of first signals.

The first signals represented by the same codebook index are from the same group of transmission ports, and the initial phase corresponding to the number of each transmission port in the same group of transmission ports is the same at the same position in a plurality of first periods. Therefore, in the first period, the terminal device may receive the first signal represented by the index of the same codebook according to the codebook set. The number of the received first signals can be increased, and the number of REs for which the terminal device samples to perform the received power measurement is increased, so that the accuracy of the downlink received power measurement can be improved.

For example, in the foregoing example, the codebook set of the network device is {0, 1, 2, 0}, that is, the network device transmits the first signal according to {0, 1, 2, 0} … … in time, the terminal device receives the first signal indicated by the index "1" of the codebook in the second first signal transmission period of the first period, and receives the first signal indicated by the index "1" of the same codebook in the second first signal transmission period of the next first period. In addition, the terminal device may receive the first signal represented by the index "1" of the codebook in the second first signal transmission period of the first period and receive the first signal represented by the index "1" of the same codebook in the third first signal transmission period of the first period according to the codebook set {0, 1, 2, 0 }. In a first period, the terminal device may receive more first signals, and the number of REs sampled by the terminal device for receiving power measurement is increased, so as to further improve the accuracy of downlink receiving power measurement. And all the first signals come from the same group of transmitting ports, and the initial phase corresponding to the serial number of each transmitting port in the same group of transmitting ports is the same at the same position in a plurality of first periods. That is, the initial phase of the first signal of each transmit port in the same group of transmit ports is the same at the same position in a plurality of first periods.

Referring to fig. 9, based on the network system architecture of fig. 1, fig. 9 is a schematic flowchart of another power measurement method according to an embodiment of the present disclosure. In the embodiment described in fig. 9, the terminal device may perform the received power measurement not only in the serving cell where the terminal device is located, that is, the terminal device measures the received power in the serving cell, but also in the neighboring cell adjacent to the serving cell. The serving cell and the neighbor cell may be covered by different network devices. As shown in fig. 9, the cell covered by the network device 1 is a serving cell, which is denoted by a first cell. The cell covered by the network device 2 is a neighboring cell of the serving cell of the terminal device, i.e. the second cell. The first period of the network device 1 transmitting the first signal to the terminal device in the first cell may be the same as or different from the second period of the network device 2 transmitting the first signal to the terminal device in the second cell. As shown in fig. 9, the power measurement method includes, but is not limited to, the following steps S201-S208.

S201, the network device 2 sends information carrying the second period in the second cell to the network device 1.

S202, the network device 1 sends second information to the terminal device, and the second information carries the first offset.

The network device 1 may calculate the first offset amount according to a first period of the first signal in the first cell and a second period of the first signal in the second cell. The first offset represents a difference in a second period of the first signal in the second cell relative to a first period of the first signal in the first cell. In addition, the network device 1 may also directly send the information carrying the second period of the first signal in the second cell to the terminal device, and the terminal device may directly receive the first signal from the same group of transmission ports in the network device 2 according to the second period in the second cell.

S203, the terminal device receives the first information sent by the network device 1.

Wherein the first information indicates a first periodicity in the first cell.

S204, the terminal device receives multiple first signals transmitted by the same group of transmitting ports in the network device 1 at the same position in multiple first periods.

S205, the terminal device determines the receiving power of the first signal in the first cell according to the multiple first signals transmitted by the same group of transmitting ports in the network device 1.

S206, the terminal device determines a second period in the second cell according to the first period in the first cell and the first offset.

S207, the terminal device receives multiple first signals transmitted by the same group of transmitting ports in the network device 2 at the same position in multiple second periods.

S208, the terminal device determines the receiving power of the first signal in the second cell according to the multiple first signals transmitted by the same group of transmitting ports in the network device 2.

The first offset may be a difference between the second period in the second cell and the first period in the first cell, and the difference may be a positive value, 0, or a negative value. The first offset may also be a ratio of a second period in the second cell to a first period in the first cell. In addition, the network device 1 sends the information carrying the first offset to the terminal device, and may also include the network device 1 sending, to the terminal device, information indicating whether the second period of the first signal in the second cell is the same as the first period in the first cell. The second period is a period in which a transmission port of the first signal in the second cell changes, or the second period is a least common multiple of the period in which the transmission port of the first signal changes and the period in which the initial phase of the first signal changes, where the first signal is used for downlink received power measurement. The second period is a period in the second cell, i.e., the neighboring cell, and the first period is a period in the first cell, i.e., the serving cell. The description of the second period may refer to the first cell similarly, and is not repeated.

In the embodiment of the present application, reference may be made to the embodiment described in fig. 5 for description of the first information and the first period, which is not described herein again.

In this embodiment, the network device 1 covering the serving cell may notify the terminal device of the first period of the serving cell, and the network device 1 covering the serving cell may also notify the terminal device of the second period of the neighboring cell. The terminal device may perform received power measurement on both the serving cell and the neighboring cell according to the first period of the serving cell and the second period of the neighboring cell. The first period of the serving cell and the second period of the neighboring cell can be notified only by the network device 1 covering the serving cell, so that the number of network devices communicating with the terminal device during the notification period can be reduced, communication generated by the terminal device in a connection process of the network devices communicating with the terminal device can be reduced, processing resources of the terminal device can be saved, and power consumption of the terminal device can be saved.

Step S203 may be performed before step S201, or may be performed before step S202. Step S204 is executed after step S203, may be executed before step S201, may be executed before step S202, may be executed after step S205, may be executed after step S206, and may be executed after step S207, which is not limited in this embodiment of the present application.

The first period and the second period are carried in different information and sent to the terminal device in the embodiment described in fig. 9. The first period and the second period may also be carried in the same information and sent to the terminal device. Referring to fig. 10, based on the network system architecture of fig. 1, fig. 10 is a schematic flowchart of another power measurement method according to an embodiment of the present application. In the embodiment described in fig. 10, the network device 1 notifies the serving cell, i.e., the first period of the first cell, and notifies the neighboring cell of the serving cell, i.e., the second period of the second cell, and the first period and the second period may be carried in the same information and sent by the network device 1 to the terminal device. As shown in FIG. 10, the power measurement method includes, but is not limited to, steps S301-S306.

S301, the network device 2 sends information carrying the second period in the second cell to the network device 1.

S302, the network device 1 sends first information to the terminal device, where the first information carries information of a first period in the first cell and a second period in the second cell.

S303, the terminal device receives multiple first signals transmitted by the same group of transmitting ports in the network device 1 at the same position in multiple first periods.

S304, the terminal device determines the receiving power of the first signal in the first cell according to the plurality of first signals transmitted by the same group of transmitting ports in the network device 1.

S305, the terminal device receives multiple first signals transmitted by the same group of transmitting ports in the network device 2 at the same position in multiple second periods.

S306, the terminal device determines the receiving power of the first signal in the second cell according to the plurality of first signals transmitted by the same group of transmitting ports in the network device 2.

In step S305, the first information may also be information carrying a first period and a first offset in the first cell, where the first offset represents a difference between a second period in the second cell and the first period in the first cell. The first offset may also be a ratio of a second period in the second cell to a first period in the first cell. The first information may also be information that indicates whether the second period in the second cell is the same as the first period in the first cell and the first period in the first cell, and the information is sent to the terminal device by carrying the network device 1.

When the first information carries the first period and the first offset of the first signal in the first cell, after step S302, the method may further include the terminal device determining a second period of the first signal in the second cell according to the first offset and the first period.

Steps S303 to S304 may be executed after step S305, or may be executed after step S306, which is not limited in this embodiment of the application.

In the embodiment of the present application, for specific descriptions of the first period and the second period, reference may be made to the embodiments described in fig. 5 and fig. 9, which are not repeated herein.

By carrying the first period of the first cell and the second period in the second cell with the same information, the first period of the serving cell and the second period of the neighboring cell can be notified to the terminal device only by the network device 1 covering the serving cell, thereby reducing the number of network devices communicating with the terminal device during the notification period. Therefore, the communication generated by the terminal equipment in the connection process of the network equipment for communication is reduced, the processing resource of the terminal equipment is saved, and the power consumption of the terminal equipment is saved. In addition, the first period of the first cell and the second period in the second cell are carried with the same information and sent to the terminal device, so that the signaling flow of the communication between the network device and the terminal device can be reduced, and the signaling overhead is saved.

The first period of the first cell and the second period of the second cell may be carried in the same information and sent to the terminal device, or may be carried in different information and sent to the terminal device. The network device may also notify the terminal device of the first period of the first cell and the second period of the second cell in any one or two of the above two manners, which is not limited in this embodiment of the present application.

The method of embodiments of the present invention is set forth above in detail and the apparatus of embodiments of the present invention is provided below.

Based on the network system architecture of fig. 1, fig. 11 is a schematic structural diagram of another network device 20 provided in this embodiment of the present application, and as shown in fig. 11, the network device 20 may include a processing unit 401 and a sending unit 402, where:

a sending unit 402, configured to send first information, where the first information indicates a first period, where the first period is a period of a change of a transmission port of a first signal, or a least common multiple of the period of the change of the transmission port of the first signal and a period of an initial phase change of the first signal, where the first signal is used for downlink received power measurement;

a processing unit 401 for determining the first signal;

a sending unit 402, further configured to send a plurality of the first signals through the same set of sending ports at the same position in a plurality of the first periods.

As a possible implementation manner, when the first period is a least common multiple of a period in which a transmission port of the first signal changes and a period in which an initial phase of the first signal changes, at the same position within a plurality of the first periods, the initial phase corresponding to the number of each transmission port in the same group of transmission ports is the same.

As a possible implementation manner, the first information is information carrying a value of the first period, or the first information is information carrying the first period in a first cell and a second period in a second cell, or the first information is information carrying the first period and a first offset in the first cell, where the first offset represents a difference between the second period in the second cell and the first period in the first cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell;

the second period is a period in which a transmission port of the first signal changes in the second cell, or the second period is a least common multiple of the period in which the transmission port of the first signal changes and the period in which the initial phase of the first signal changes in the second cell.

As a possible implementation manner, the sending unit 402 is further configured to send second information, where the second information carries information of a second period in a second cell, or the second information carries information of a first offset; the first offset represents a difference of the second period in the second cell with respect to the first period in the first cell;

the second period is a period in which a transmission port of the first signal changes in the second cell, or the second period is a least common multiple of the period in which the transmission port of the first signal changes and the period in which the initial phase of the first signal changes in the second cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell.

As a possible implementation manner, the first information is information carrying a codebook set, where the codebook set includes indexes of N codebooks, where the N codebooks respectively represent N groups of transmission ports and/or initial phases of the first signal; n is a positive integer greater than or equal to 1; the first period is equal to N x t, wherein t is the transmission period of the first signal;

a transmitting unit 402, configured to transmit a plurality of first signals through a same set of transmit ports at a same position in a plurality of first periods, including: a sending unit 402, configured to send, according to the codebook set, a plurality of first signals through a same group of sending ports at a same position in a plurality of first periods.

As a possible implementation, the first signal is a narrowband secondary synchronization signal NSSS.

In this embodiment, the functions of the processing unit 401 and the sending unit 402 may correspond to the corresponding descriptions of the embodiments of the power measurement method shown in fig. 5, fig. 9, and fig. 10, and are not described again.

Based on the network system architecture of fig. 1, fig. 12 is a schematic structural diagram of another communication device 10 provided in this embodiment, where the communication device 10 may be the terminal device 10 described in fig. 2, and as shown in fig. 12, the communication device 10 may include a processing unit 501 and a receiving unit 502, where:

a receiving unit 502, configured to receive first information, where the first information indicates a first period, where the first period is a period of a transmission port change of a first signal, or a least common multiple of the period of the transmission port change of the first signal and a period of an initial phase change of the first signal, where the first signal is used for downlink received power measurement;

a receiving unit 502, further configured to receive a plurality of the first signals of a same group of transmitting ports at a same position in a plurality of the first periods;

a processing unit 501, configured to determine the received power of the first signal according to the plurality of first signals.

As a possible implementation manner, when the first period is the least common multiple of the period of the change of the transmission port of the first signal and the period of the change of the initial phase of the first signal, the initial phase corresponding to the number of each transmission port in the same group of transmission ports is the same at the same position in the plurality of first periods.

As a possible implementation manner, the first information is information carrying a value of the first period, or the first information is information carrying the first period in the first cell and the second period in the second cell, or the first information is information carrying the first period and a first offset in the first cell, where the first offset represents a difference between the second period in the second cell and the first period in the first cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell;

the second period is a period in which a transmission port of the first signal in the second cell changes, or the second period is a least common multiple of the period in which the transmission port of the first signal in the second cell changes and the period in which the initial phase of the first signal changes.

As a possible implementation manner, when the first information is information carrying the first period in the first cell and the second period in the second cell, or when the first information is information carrying the first period and the first offset in the first cell,

after the receiving unit 502 receives the first information, the processing unit 501 is further configured to determine a value of the second period in the second cell according to the first information;

a receiving unit 502, further configured to receive, at a same position in a plurality of second periods, a plurality of first signals of a same set of transmitting ports of the second cell;

the processing unit 501 is further configured to determine, according to the plurality of first signals, received power of the first signal in the second cell.

As a possible implementation manner, the receiving unit 502 is further configured to receive second information, where the second information carries information of the second period in a second cell, or the second information carries information of a first offset; the first offset represents a difference of the second period in the second cell with respect to the first period in the first cell;

the second period is a period in which a transmission port of the first signal changes in the second cell, or the second period is a least common multiple of the period in which the transmission port of the first signal changes and the period in which the initial phase of the first signal changes in the second cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell;

a receiving unit 502, further configured to receive, according to the second period, multiple first signals of a same group of transmitting ports of the second cell at a same position in multiple second periods;

As a possible implementation manner, the first information is information carrying a codebook set, where the codebook set includes indexes of N codebooks, where the N codebooks respectively represent N groups of transmission ports and/or initial phases of the first signal; n is a positive integer greater than or equal to 1;

after the receiving unit 502 receives the first information, the processing unit 501 is further configured to determine the first period according to the number N of the indices of the codebook in the codebook set, where the first period is equal to N × t, and t is a transmission period of the first signal.

As a possible implementation manner, in a plurality of the first periods, the receiving unit 502 is further configured to receive a plurality of the first signals represented by indexes of a first codebook; the index of the first codebook is an index of a codebook associated with a plurality of the first signals.

In this embodiment, the functions of the processing unit 501 and the receiving unit 502 may correspond to the corresponding descriptions of the embodiments of the power measurement method shown in fig. 5, fig. 9, and fig. 10, and are not described again.

An embodiment of the present application further provides a power measurement system, including: network device 20 and terminal device 10, wherein: the network device 20 establishes a communication connection with the terminal device 10, and the network device 20 is configured to execute implementation of the power measurement method shown in fig. 5, 9, or 10 on a network device side; the terminal device 10 is used for implementing the power measurement method shown in fig. 5, 9 or 10 on the terminal device side. For specific implementation of the network device 20 and the terminal device 10, reference may be made to method embodiments corresponding to fig. 5, fig. 9, and fig. 10, which are not described herein again.

In particular, the network device 20 may be the network device described in fig. 3 or fig. 11. The terminal device 10 may be the terminal device described in fig. 2 or fig. 12.

The computer instructions may be stored in or transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center via a wired (e.g., coaxial cable, fiber optic, digital subscriber line (DS L)) or wireless (e.g., infrared, wireless, microwave, etc.) manner.

One of ordinary skill in the art will appreciate that all or part of the processes in the methods of the above embodiments may be implemented by hardware related to instructions of a computer program, which may be stored in a computer-readable storage medium, and when executed, may include the processes of the above method embodiments. And the aforementioned storage medium includes: various media capable of storing program codes, such as ROM or RAM, magnetic or optical disks, etc.

Claims

A method of power measurement, comprising:

the network equipment transmits first information, wherein the first information indicates a first period, the first period is a period of change of a transmission port of a first signal, or the first period is a least common multiple of the period of change of the transmission port of the first signal and a period of change of an initial phase of the first signal, and the first signal is used for downlink received power measurement;

the network device determining the first signal;

the network device transmits a plurality of the first signals through the same set of transmit ports at the same location over a plurality of the first periods.
The method of claim 1, wherein when the first period is a least common multiple of a period of a transmission port change of the first signal and a period of an initial phase change of the first signal, the initial phase corresponding to the number of each transmission port in the same group of transmission ports is the same at a same position in a plurality of the first periods.
The method according to claim 1 or 2, wherein the first information is information carrying a value of the first period, or the first information is information carrying the first period in a first cell and a second period in a second cell, or the first information is information carrying the first period and a first offset in the first cell, and the first offset represents a difference between the second period in the second cell and the first period in the first cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell;

the second period is a period in which a transmission port of the first signal changes in the second cell, or the second period is a least common multiple of the period in which the transmission port of the first signal changes and the period in which the initial phase of the first signal changes in the second cell.
The method according to any one of claims 1 to 3, further comprising:

the network equipment sends second information, wherein the second information carries information of a second period in a second cell, or the second information carries information of a first offset; the first offset represents a difference of the second period in the second cell with respect to the first period in the first cell;

the second period is a period in which a transmission port of the first signal changes in the second cell, or the second period is a least common multiple of the period in which the transmission port of the first signal changes and the period in which the initial phase of the first signal changes in the second cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell.
The method according to claim 1 or 2, wherein the first information is information carrying a codebook set, the codebook set includes indexes of N codebooks, and the N codebooks respectively represent N groups of transmission ports and/or initial phases of the first signal; n is a positive integer greater than or equal to 1; the first period is equal to N x t, wherein t is the transmission period of the first signal;

the network device transmits a plurality of the first signals through the same set of transmit ports at the same location within a plurality of the first periods, including:

and the network equipment transmits a plurality of first signals through the same group of transmitting ports at the same positions in a plurality of first periods according to the codebook set.
The method according to any of claims 1 to 5, wherein the first signal is a Narrowband Secondary Synchronization Signal (NSSS).
A method of power measurement, comprising:

the terminal equipment receives first information, wherein the first information indicates a first period, the first period is a period of change of a transmitting port of a first signal, or the first period is a least common multiple of the period of change of the transmitting port of the first signal and a period of change of an initial phase of the first signal, and the first signal is used for downlink receiving power measurement;

the terminal equipment receives a plurality of first signals of the same group of transmitting ports at the same position in a plurality of first periods;

and the terminal equipment determines the received power of the first signal according to the plurality of first signals.
The method of claim 7, wherein when the first period is a least common multiple of a period of a transmission port change of the first signal and a period of an initial phase change of the first signal, the initial phase corresponding to the number of each transmission port in the same group of transmission ports is the same at a same position in a plurality of the first periods.
The method according to claim 7 or 8, wherein the first information is information carrying a value of the first period, or the first information is information carrying the first period in the first cell and a second period in a second cell, or the first information is information carrying the first period and a first offset in the first cell, and the first offset represents a difference between the second period in the second cell and the first period in the first cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell;

the second period is a period in which a transmission port of the first signal in the second cell changes, or the second period is a least common multiple of the period in which the transmission port of the first signal in the second cell changes and the period in which the initial phase of the first signal changes.
The method of claim 9, wherein when the first information is information carrying the first period in the first cell and the second period in a second cell, or when the first information is information carrying the first period and a first offset in the first cell,

after the terminal device receives the first information, the method further includes:

the terminal equipment determines the value of the second period in the second cell according to the first information;

the terminal device receives a plurality of first signals of the same group of transmitting ports of the second cell at the same positions in a plurality of second periods;

and the terminal equipment determines the received power of the first signal in the second cell according to the plurality of first signals.
The method according to any one of claims 7 to 10, further comprising:

the terminal equipment receives second information, wherein the second information carries information of the second period in a second cell, or the second information carries information of a first offset; the first offset represents a difference of the second period in the second cell with respect to the first period in the first cell;

the second period is a period in which a transmission port of the first signal changes in the second cell, or the second period is a least common multiple of the period in which the transmission port of the first signal changes and the period in which the initial phase of the first signal changes in the second cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell;

the terminal equipment receives a plurality of first signals of the same group of transmitting ports of the second cell at the same positions in a plurality of second periods according to the second periods;

and the terminal equipment determines the received power of the first signal in the second cell according to the plurality of first signals.
The method according to claim 7 or 8, wherein the first information is information carrying a codebook set, the codebook set includes indexes of N codebooks, and the N codebooks respectively represent N groups of transmission ports and/or initial phases of the first signal; n is a positive integer greater than or equal to 1;

after the terminal device receives the first information, the method further includes:

and the terminal equipment determines the first period according to the number N of the indexes of the codebook in the codebook set, wherein the first period is equal to N x t, and t is the transmission period of the first signal.
The method of claim 12, further comprising:

the terminal equipment receives a plurality of first signals represented by indexes of a first codebook in a plurality of first periods; the index of the first codebook is an index of a codebook associated with a plurality of the first signals.
The method according to any of claims 7 to 13, wherein the first signal is a narrowband secondary synchronization signal, NSSS.
A network device comprising a processing unit and a transmitting unit, wherein:

the transmitting unit is configured to transmit first information, where the first information indicates a first period, where the first period is a period in which a transmission port of a first signal changes, or the first period is a least common multiple of the period in which the transmission port of the first signal changes and a period in which an initial phase of the first signal changes, where the first signal is used for downlink received power measurement;

the processing unit is used for determining the first signal;

the sending unit is further configured to send a plurality of first signals through the same set of sending ports at the same position in a plurality of first periods.
The apparatus of claim 15, wherein when the first period is a least common multiple of a period of a transmit port change of the first signal and a period of an initial phase change of the first signal, at a same position within a plurality of the first periods, an initial phase corresponding to a number of each transmit port in the same group of transmit ports is the same.
The apparatus according to claim 15 or 16, wherein the first information is information carrying a value of the first period, or the first information is information carrying the first period in a first cell and a second period in a second cell, or the first information is information carrying the first period and a first offset in the first cell, and the first offset represents a difference between the second period in the second cell and the first period in the first cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell;

the second period is a period in which a transmission port of the first signal changes in the second cell, or the second period is a least common multiple of the period in which the transmission port of the first signal changes and the period in which the initial phase of the first signal changes in the second cell.
The apparatus according to any one of claims 15 to 17, wherein the sending unit is further configured to send second information, where the second information is information carrying a second period in a second cell, or the second information is information carrying a first offset; the first offset represents a difference of the second period in the second cell with respect to the first period in the first cell;

the second period is a period in which a transmission port of the first signal changes in the second cell, or the second period is a least common multiple of the period in which the transmission port of the first signal changes and the period in which the initial phase of the first signal changes in the second cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell.
The apparatus according to claim 15 or 16, wherein the first information is information carrying a codebook set, the codebook set includes indexes of N codebooks, where the N codebooks respectively represent N groups of transmission ports and/or initial phases of the first signal; n is a positive integer greater than or equal to 1; the first period is equal to N x t, wherein t is the transmission period of the first signal;

the sending unit sends a plurality of first signals through the same group of sending ports at the same position in a plurality of first periods, and the sending unit comprises:

the sending unit is configured to send a plurality of first signals through the same set of sending ports at the same positions in a plurality of first periods according to the codebook set.
The apparatus according to any of claims 15 to 19, wherein the first signal is a narrowband secondary synchronization signal, NSSS.
A terminal device, comprising a processing unit and a receiving unit, wherein:

the receiving unit is configured to receive first information, where the first information indicates a first period, where the first period is a period in which a transmission port of a first signal changes, or a least common multiple of the period in which the transmission port of the first signal changes and a period in which an initial phase of the first signal changes, where the first signal is used for downlink received power measurement;

the receiving unit is further configured to receive a plurality of the first signals of a same group of transmitting ports at a same position in a plurality of the first periods;

the processing unit is configured to determine the received power of the first signal according to the plurality of first signals.
The apparatus of claim 21, wherein the first period is a least common multiple of a period of a transmit port change of the first signal and a period of an initial phase change of the first signal, and wherein the initial phase corresponding to the number of each transmit port in the same group of transmit ports is the same at a same position in a plurality of the first periods.
The apparatus according to claim 21 or 22, wherein the first information is information carrying a value of the first period, or the first information is information carrying the first period in the first cell and a second period in a second cell, or the first information is information carrying the first period and a first offset in the first cell, and the first offset represents a difference between the second period in the second cell and the first period in the first cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell;

the second period is a period in which a transmission port of the first signal in the second cell changes, or the second period is a least common multiple of the period in which the transmission port of the first signal in the second cell changes and the period in which the initial phase of the first signal changes.
The apparatus of claim 23, wherein when the first information is information carrying the first period in the first cell and the second period in a second cell, or when the first information is information carrying the first period and a first offset in the first cell,

after the receiving unit receives the first information, the processing unit is further configured to determine a value of the second period in the second cell according to the first information;

the receiving unit is further configured to receive, at a same position in a plurality of second periods, a plurality of first signals of a same set of transmit ports of the second cell;

the processing unit is further configured to determine a received power of the first signal in the second cell according to the plurality of first signals.
The apparatus according to any of claims 21 to 24, wherein the receiving unit is further configured to receive second information, where the second information is information carrying the second period in a second cell, or the second information is information carrying a first offset; the first offset represents a difference of the second period in the second cell with respect to the first period in the first cell;

the second period is a period in which a transmission port of the first signal changes in the second cell, or the second period is a least common multiple of the period in which the transmission port of the first signal changes and the period in which the initial phase of the first signal changes in the second cell; the first cell is a serving cell of the terminal device, and the second cell is a neighboring cell of the first cell;

the receiving unit is further configured to receive, according to the second period, a plurality of first signals of a same set of transmitting ports of the second cell at a same position in a plurality of second periods;

the processing unit is further configured to determine a received power of the first signal in the second cell according to the plurality of first signals.
The apparatus according to claim 21 or 22, wherein the first information is information carrying a codebook set, the codebook set includes indexes of N codebooks, where the N codebooks respectively represent N groups of transmission ports and/or initial phases of the first signal; n is a positive integer greater than or equal to 1;

after the receiving unit receives the first information, the processing unit is further configured to determine the first period according to the number N of the indices of the codebook in the codebook set, where the first period is equal to N × t, and t is a transmission period of the first signal.
The apparatus of claim 26, wherein the receiving unit is further configured to receive a plurality of the first signals represented by indices of a first codebook in a plurality of the first periods; the index of the first codebook is an index of a codebook associated with a plurality of the first signals.
The apparatus according to any of claims 21 to 27, wherein the first signal is a narrowband secondary synchronization signal, NSSS.