CN113473517A

CN113473517A - Method and device for measuring different frequencies or different systems

Info

Publication number: CN113473517A
Application number: CN202010247713.3A
Authority: CN
Inventors: 金乐
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2021-10-01
Anticipated expiration: 2040-03-31
Also published as: CN113473517B

Abstract

The application discloses a method for measuring different frequencies or different systems and a communication device, so that a terminal can measure reference signals of more adjacent cells. The method comprises the following steps: when a terminal needs to measure a first frequency point, if the first frequency point is located in a frequency band of a part of bandwidth BWP activated by a first service cell of the terminal, receiving a signal of the frequency band of the BWP through a radio frequency channel working in the frequency band of the BWP; the first serving cell and a third cell which sends a reference signal on the first frequency point are pilot frequency cells, and the third cell is a neighboring cell of the first serving cell; or the second serving cell of the terminal and the third cell are different system cells, the second serving cell is the main cell of the terminal, and the first serving cell is the auxiliary cell of the terminal; the terminal determines a signal corresponding to a first frequency point in a BWP frequency band signal; and the terminal determines the measurement result of the third cell on the first frequency point according to the signal corresponding to the first frequency point.

Description

Method and device for measuring different frequencies or different systems

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a method and a device for measuring different frequencies or different systems.

Background

In mobile communication systems, measurement is a common and important process. For example, when the terminal is in an idle state, the terminal determines whether to reselect to a neighboring cell by measuring the signal quality of the serving cell and the neighboring cell; for another example, when the terminal is in a connected state, the terminal measures the signal quality of the serving cell and the neighboring cell and reports the measured values to the network device, and the network device determines and triggers the terminal to switch to the neighboring cell according to the measured values of the cells reported by the terminal. A terminal in a connected state may need a measurement gap (measurement gap) when performing measurement on a neighbor cell of an inter-frequency or inter-system. In the measurement gap, the terminal receives signals of adjacent cells of different frequencies or different systems, and the measurement process is completed. The network device will typically configure the terminal with parameters of the measurement gap, such as the length of the measurement gap, the period of the measurement gap, etc. The length of the measurement gap cannot be too long, typically 6 milliseconds.

In an existing fifth generation (5G) New Radio (NR) communication system, Primary Synchronization Signals (PSS), Secondary Synchronization Signals (SSS), and Physical Broadcast Channels (PBCH) are called synchronization signals/broadcast signal blocks (SS/PBCH blocks). For convenience of description, the SS/PBCH block is referred to as SSB. The NR cell sends a plurality of SSBs in one cycle, each SSB covering a certain area, and each SSB sends at a candidate SSB (candidates) position defined by the protocol. All SSB candidates are located within one half frame (5 ms). If the terminal is required to accurately measure the SSBs of the neighboring cells, the time domain positions of the SSBs need to fall within the measurement gaps.

However, in an actual network, a measurement gap configured for the terminal by the serving cell may not cover the SSB time domain position of the NR neighboring cell, so that the terminal may not measure the SSB of the NR neighboring cell, which affects measurement performance and may not implement reselection or handover correctly.

Disclosure of Invention

The embodiment of the application provides a method and a device for measuring a pilot frequency or a pilot system, aiming to solve the problem that a terminal cannot measure an SSB (signal to interference) of an NR (neighboring node) in a measurement gap.

In a first aspect, a measurement method is provided, which may be applied to a terminal, or to a device associated with a terminal. The method can be realized by the following steps: when a first frequency point needs to be measured, if the first frequency point is located in a frequency band of a BWP (partial bandwidth BWP) activated by a first serving cell of the terminal, receiving a signal of the BWP frequency band through a radio frequency path working in the BWP frequency band; wherein: the first serving cell and a third cell which sends a reference signal on the first frequency point are pilot frequency cells, and the third cell is a neighboring cell of the first serving cell; or the second serving cell and the third cell of the terminal are inter-system cells, the second serving cell is a primary cell of the terminal, and the first serving cell is a secondary cell of the terminal; the terminal determines a signal corresponding to the first frequency point in the BWP frequency band signal; and the terminal determines the measurement result of the third cell according to the signal corresponding to the first frequency point.

The third cell is a neighboring cell of a service cell where the terminal is located, the first frequency point is a frequency point to be measured, the neighboring cell sends a reference signal on the first frequency point, and the terminal measures the first frequency point refers to measuring the reference signal sent by the neighboring cell on the first frequency point.

When a first frequency point to be measured falls within the activated BWP frequency band range of a first service cell, the measurement of the adjacent region of the first frequency point is converted into the measurement of signals in the BWP frequency band. Therefore, the signal of the serving cell can be continuously received, and the reference signal of the adjacent region can be measured without measuring gaps, namely, the signal of the serving cell does not need to be stopped from being received, but the signal of the BWP frequency band is received through the radio frequency path of the BWP frequency band. And the reference signal on the first frequency point can be continuously measured in a longer time without the limitation of a measurement gap, so that the problem that the terminal cannot measure the reference signal of all or part of the adjacent cells because the reference signal is not in the measurement gap is solved, and the performance of measuring the adjacent cells is improved.

Optionally, the terminal obtains the information of the first frequency point to be measured in advance, and may obtain the information from the network device.

In one possible design, receiving the BWP band signal includes: and the terminal receives the signal of the BWP frequency band in a first measurement window, wherein the duration of the first measurement window is greater than or equal to the period of sending the reference signal by the third cell on the first frequency point. For example, the duration of the first measurement window is a period of SSB Measurement Time Configuration (SMTC). The period of the SMTC is the period that the network device notifies the terminal to measure the SSB, and is generally not less than the period of the SSB.

In a possible design, the terminal may further determine, according to the signal corresponding to the first frequency point, a time domain position where the third cell transmits a reference signal on the first frequency point, where the time domain position includes an offset value from a starting position of the first measurement window. In practical applications, different adjacent cells may transmit different reference signals at different positions, and then the terminal may obtain multiple offset values. In this way, the terminal may further determine a second measurement window according to the offset value in each measurement period in at least one measurement period after the first measurement window; the duration of the second measurement window is less than that of the first measurement window, the measurement period is M times of the duration of the first measurement window, M is a positive integer, and when M is 1, the second measurement window is determined according to the starting position of the measurement period and the offset value; when M is larger than 1, the measuring period comprises M sub-periods with equal length, the length of each sub-period is equal to that of the first measuring window, and the second measuring window in each sub-period is obtained according to the starting position of the sub-period and the offset value.

And the terminal measures the reference signal sent by the third cell on the first frequency point in the second measurement window. Therefore, the terminal does not need to measure all the time in the measuring period, and the power consumption of the terminal can be effectively saved. The measurement period may be the same as or different from the duration of the first measurement window, and in general, the measurement period may be longer than the first measurement window, for example, the measurement period is m times the first measurement window, and m is a positive integer.

Assuming that the third cell is an NR neighboring cell, the reference signal sent by the NR neighboring cell is an SSB, and the SSB is sent in a half frame, that is, within 5ms, so that the duration of the second measurement window is 5 ms.

Optionally, the duration that the NR neighboring cell actually occupies the half frame when sending the SSB may be less than 5ms in different SCS or different frequency ranges. In this way, the terminal may determine, for different SCS or different frequency ranges, a time length actually occupied by the third cell for sending the SSB, where the time length of the second measurement window is the time length occupied by the third cell for sending the reference signal, and the time length occupied by the third cell for sending the reference signal is less than 5 ms. This can further save power consumption of the terminal.

In a second aspect, a communication device is provided, which may be a terminal, a device (e.g. a chip or a system of chips or a circuit) in the terminal, or a device capable of being used with the terminal. In one design, the communication device may include a module corresponding to one or more of the methods/operations/steps/actions described in the first aspect, where the module may be implemented by hardware circuit, software, or a combination of hardware circuit and software.

In one design, the communication device may include a processing module and a communication module. The processing module is used for calling the communication module to execute the receiving and/or sending functions. Exemplarily, the following steps are carried out: the communication module is configured to receive, when a first frequency point needs to be measured, a signal of a BWP band through a radio frequency path working in the BWP band if the first frequency point is located in a frequency band of a partial bandwidth BWP activated by a first serving cell of the terminal; wherein: the first serving cell and a third cell which sends a reference signal on the first frequency point are pilot frequency cells, and the third cell is a neighboring cell of the first serving cell; or, a second serving cell of the terminal and the third cell are different system cells, the second serving cell is a primary cell of the terminal, and the first serving cell is a secondary cell of the terminal; the processing module is used for determining a signal corresponding to the first frequency point in the BWP frequency band signal; and the measuring result of the first third cell is determined according to the signal corresponding to the first frequency point.

Optionally, the processing module is further configured to obtain information of the first frequency point to be measured in advance, and for example, the information of the first frequency point may be obtained from a network device.

In a possible design, when receiving the signal of the BWP frequency band, the communication module may specifically receive the signal of the BWP frequency band within a first measurement window, where a duration of the first measurement window is greater than or equal to a period in which the neighboring cell transmits the reference signal on the first frequency point. For example, the duration of the first measurement window is the period of SMTC. The period of the SMTC is the period that the network device notifies the terminal to measure the SSB, and is generally not less than the period of the SSB.

In one possible design, the processing module is further configured to determine, according to the signal corresponding to the first frequency point, a time domain position where a third cell sends a reference signal on the first frequency point, where the time domain position includes an offset value from a starting position of the first measurement window. In practical applications, different adjacent cells may transmit different reference signals at different positions, and then the terminal may obtain multiple offset values. The processing module is further configured to determine, in at least one measurement period after the first measurement window, a second measurement window in each measurement period according to the offset value, and measure, in the second measurement window, a reference signal sent by the third cell on the first frequency point. The duration of the second measurement window is less than that of the first measurement window, the measurement period is M times of the duration of the first measurement window, M is a positive integer, and when M is 1, the second measurement window is determined according to the starting position of the measurement period and the offset value; when M is larger than 1, the measuring period comprises M sub-periods with equal length, the length of each sub-period is equal to that of the first measuring window, and the second measuring window in each sub-period is obtained according to the starting position of the sub-period and the offset value.

Therefore, the terminal does not need to measure all the time in the measuring period, and the power consumption of the terminal can be effectively saved. The measurement period may be the same as or different from the duration of the first measurement window, and in general, the measurement period may be longer than the first measurement window, for example, the measurement period is M times the first measurement window, and M is a positive integer.

Optionally, the duration that the NR neighboring cell actually occupies the half frame when sending the SSB may be less than 5ms in different SCS or different frequency ranges. Therefore, the terminal can determine the actual occupied time length of the SSB sent by the adjacent cell aiming at different SCSs or different frequency ranges, the time length of the second measurement window is the occupied time length of the reference signal sent by the adjacent cell, and the occupied time length of the reference signal sent by the adjacent cell is less than 5 ms. This can further save power consumption of the terminal.

In a third aspect, a communication apparatus is provided, which includes a communication interface and a processor, wherein the communication interface is used for the communication apparatus to communicate with other devices, such as data or signal transceiving. Illustratively, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface, and the other device may be a network device. The processor is arranged to invoke a set of programs, instructions or data to perform the method described in the first aspect above. The communication device may also include a memory for storing programs, instructions or data called by the processor. The memory is coupled to the processor, and the processor, when executing instructions or data stored in the memory, may implement the method described in the first aspect above.

In a fourth aspect, this application further provides a computer-readable storage medium having stored thereon computer-readable instructions that, when executed on a computer, cause a method as described in the first aspect, or any one of the possible designs of the first aspect, to be performed.

In a fifth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method described in the first aspect or any one of the possible designs of the first aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

A sixth aspect provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method as set forth in the first aspect or any one of the possible designs of the first aspect.

Drawings

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

fig. 1b is a schematic diagram of a terminal architecture in the embodiment of the present application;

FIG. 2 is a schematic diagram of measurement gap and SSB relationship under one condition in an embodiment of the present application;

fig. 3 is a schematic diagram illustrating a situation that a terminal moves in a cell in an embodiment of the present application;

FIG. 4 is a schematic diagram of measurement gap and SSB relationship under another condition in the embodiment of the present application;

fig. 5 is a schematic flow chart of a measurement method of an inter-frequency or inter-system in the embodiment of the present application;

fig. 6 is a schematic diagram illustrating an exemplary measurement method of an inter-frequency or inter-system in an embodiment of the present application;

fig. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 8 is a second schematic structural diagram of a communication device in the embodiment of the present application.

Detailed Description

The embodiment of the application provides a method and a device for measuring different frequencies or different systems, so as to solve the problem that a terminal may not be able to measure the SSBs of all neighboring cells in a measurement gap. The method and the device are based on the same technical conception, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.

The method for measuring the inter-frequency or inter-system provided in the embodiment of the present application may be applied to a fourth generation (4th generation, 4G) communication system, such as Long Term Evolution (LTE), or may be applied to a fifth generation (5th generation, 5G) communication system, such as a 5G new radio interface (NR), or may be applied to various future communication systems. The embodiment of the application is suitable for a time-division duplex (TDD) cell. It is also applicable to frequency-division duplex (FDD) cells.

Fig. 1a shows a possible architecture of a communication system to which the inter-frequency or inter-system measurement method provided in the embodiment of the present application is applicable, and referring to fig. 1a, the communication system 100 includes: a network device 101 and one or more terminals 102. The network device 101 provides services to terminals 102 within a coverage area. For example, referring to fig. 1a, a network device 101 provides wireless access to one or more terminals 102 within the coverage area of the network device 101.

The network device 101 is a node in a Radio Access Network (RAN), which may also be referred to as a base station and may also be referred to as a RAN node (or device). Currently, some examples of network devices 101 are: next generation base station (gNB), next generation evolved Node B (Ng-eNB), Transmission Reception Point (TRP), evolved Node B (evolved Node B, eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), home base station (e.g., home evolved Node B, or home Node B, HNB), Base Band Unit (BBU), or wireless fidelity (Wifi) access point (access point, AP), network device 101 may also be a satellite, and satellite may also be referred to as an aerial platform, an aerial vehicle, or a satellite high altitude base station. Network device 101 may also be other network device enabled devices, for example, network device 101 may also be a device that serves network device functionality in D2D communications. The network device 101 may also be a network device in a future possible communication system.

In some deployments, a network device may include Centralized Units (CUs) and Distributed Units (DUs). The network device may also include an Active Antenna Unit (AAU). The CU implements part of functions of the network device, and the DU implements part of functions of the network device, for example, the CU is responsible for processing non-real-time protocols and services, and implements functions of a Radio Resource Control (RRC) layer and a packet data convergence layer (PDCP) layer. The DU is responsible for processing a physical layer protocol and a real-time service, and implements functions of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. The AAU implements part of the physical layer processing functions, radio frequency processing and active antenna related functions. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as the RRC layer signaling, may also be considered to be transmitted by the DU or by the DU + AAU under this architecture. It is to be understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

A terminal 102, also referred to as User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., is a device that provides voice and/or data connectivity to a user. For example, the terminal 102 includes a handheld device, a vehicle-mounted device, or the like having a wireless connection function. Currently, the terminal 102 may be: mobile phone (mobile phone), tablet computer, notebook computer, palm computer, Mobile Internet Device (MID), wearable device (e.g. smart watch, smart bracelet, pedometer, etc.), vehicle-mounted device (e.g. car, bicycle, electric car, airplane, ship, train, high-speed rail, etc.), Virtual Reality (VR) device, Augmented Reality (AR) device, wireless terminal in industrial control (industrial control), smart home device (e.g. refrigerator, television, air conditioner, electric meter, etc.), smart robot, workshop device, wireless terminal in self drive (driving), wireless terminal in remote surgery (remote medical supply), wireless terminal in smart grid (smart grid), wireless terminal in transportation safety (transportation safety), wireless terminal in smart city (city), or a wireless terminal in a smart home (smart home), a flying device (e.g., a smart robot, a hot air balloon, a drone, an airplane), etc. The terminal 102 may also be other terminal-capable devices, for example, the terminal 102 may also be a terminal that serves a terminal function in D2D communication.

A possible architecture of the terminal 102 is exemplified below, as shown in fig. 1 b.

The terminal 102 mainly includes the following components: a memory, a processor, a Transmit (TX) signal processing unit, and a Receive (RX) signal processing unit. Wherein the TX signal processing unit and the RX signal processing unit are connected by a communication line.

The memory may include static memory for storing executable code and data, and may also include dynamic memory for storing instructions and dynamic data.

A processor for controlling the TX signal processing unit to transmit signals in a predefined manner and/or for controlling the RX signal processing unit to transmit receive signals in a predefined manner.

And the TX signal processing unit is used for realizing various signal processing functions of signal transmission, including processes of channel coding, scrambling, modulation, layer mapping, precoding, antenna mapping and the like.

The RX signal processing unit implements various signal processing functions of signal reception, including synchronization, time-frequency tracking, measurement, channel estimation, equalization, demodulation, descrambling, decoding, and the like.

The TX signal processing unit and the RX signal processing unit are respectively connected with the antenna through a TX radio frequency channel and an RX radio frequency channel. The TX radio frequency channel modulates the baseband signal to carrier frequency and sends the baseband signal out through an antenna; the RX rf channel demodulates the rf signal received from the antenna into a baseband signal for processing by an RX signal processing unit.

Different TX rf channels may connect different antennas. Different RX radio frequency channels may connect different antennas. For example, in fig. 1b, TX rf channel 1 and RX rf channel 1 are connected to antenna 1; the TX radio frequency channel n and the RX radio frequency channel n are connected with an antenna 2; RX radio path m connects either antenna s or antenna t.

In the embodiment of the application, the measurement signals of the serving cell and the neighbor cell are received mainly through an RX radio frequency channel, and the measurement signals, such as SSB signals, are handed over to an RX signal processing unit to calculate the signal quality of the serving cell and the neighbor cell. When the signal quality of the serving cell and the neighboring cell measured by the terminal meets the measurement reporting condition, the terminal reports the measurement result to the network device through an RRC signaling measurement report (MeasurementReport).

In the embodiment of the present application, the terminal needs to measure the cells adjacent to the serving cell. For convenience of description, a cell adjacent to a serving cell where the terminal is located may be referred to as a neighbor cell or a neighboring cell. The serving cell in which the terminal is located may have one or more neighbor cells. When the terminal is located at the edge of the serving cell, it needs to measure the neighboring cell and may trigger reselection, cell handover, or other actions.

When the terminal measures the neighboring cell, it may receive a reference signal from the neighboring cell, and the quality of the reference signal may be used to determine whether to trigger reselection or cell handover. For example, the terminal reports the quality of the reference signal of the neighboring cell to the network device, and the network device determines whether the terminal needs cell switching according to the content reported by the terminal. The quality of the reference signal may include any one or more of: reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), signal-to-noise ratio (SNR), SINR, and the like.

In NR, the reference signal may be generally SSB. Of course, the method of the embodiment of the present application can also be applied to other communication systems, and the reference signal can also be other types of signals. For example, the reference signal may be a channel state information reference signal (CSI-RS). In the embodiment of the present application, the reference signal is taken as an SSB for example, and when the reference signal is applied to other types of reference signals, the scheme of the SSB may be replaced by the scheme of the other types of reference signals.

In some scenarios, a terminal needs a measurement gap to measure a reference signal of a neighboring cell. For example, when the serving cell and the neighboring cell of the terminal are in a scenario of inter-frequency/inter-system. In this scenario, when the terminal is in an RRC CONNECTED (RRC _ CONNECTED) state, the terminal needs to always keep a frequency point where a radio frequency channel operates in a serving cell. If the terminal does not have an extra radio frequency channel to work on the frequency point of the different-frequency/different-system cell, the terminal cannot receive the signal of the service cell and the signal of the different-frequency/different-system cell at the same time, and a period of measurement gap is needed. In the measurement gap, the terminal can stop receiving signals on the serving cell, adjust the radio frequency channel to work at the frequency point of the pilot frequency/different system cell, receive the signals of the pilot frequency/different system cell, and complete the measurement of the neighboring cell.

In general, a periodic transmission method is adopted when the neighbor cell transmits the reference signal. The reference signal is transmitted for a period of time within one period. And, the times of transmitting reference signals of different neighboring cells may not be aligned. When the terminal measures the reference signal of the adjacent cell, the terminal can receive the reference signal of the adjacent cell only if the time for sending the reference signal of the adjacent cell falls within the measurement gap of the terminal, or if the time for sending the reference signal of the adjacent cell and the measurement gap of the terminal have intersection. However, as described above, the time for transmitting the reference signals by the neighboring cells may not be aligned, and thus, the terminal may not receive the reference signals of all the neighboring cells within the measurement gap, or even may not receive the reference signals of any neighboring cells.

Taking the neighboring cell of the serving cell where the terminal is located as an NR cell (NR neighboring cell for short), the reference signal sent by the NR neighboring cell is SSB. In the time domain, one SSB contains four Orthogonal Frequency Division Multiplexing (OFDM) symbols. The terminal determines an SSB block index (block index) jointly through different demodulation reference Signal (DMRS) sequences and an index (index) transmitted in the PBCH, for identifying different SSBs. The specific method for determining the block index of the SSB is well known to those skilled in the art and will not be described in detail. In NR, a synchronization signal is transmitted by beam scanning. The network device sends a plurality of SSBs in one cycle, each SSB covers a certain area, and each SSB sends at a candidate SSB (candidates) position defined by the protocol. All SSBs candidates are located in one half-frame (5 ms), and SSBs transmitted in one half-frame are grouped to form one SSB cluster set (SSB burst set). In the present application, the SSB candidates position refers to a symbol position in the time domain.

The SSB sent by the NR neighboring cell is periodically repeated, and the period size is configurable, and possible values of the SSB period may be: 5 milliseconds (ms), 10ms, 20ms, 40ms, 80ms, or 160 ms. For SSB for terminal access, a typical value for the periodicity is 20 ms.

As shown in fig. 2, it is assumed that the SSB period is 20ms, there are 4 5ms in one period, and all SSBs in one SSB burst set are concentrated in 1 of the 5ms for transmission, and no SSB is transmitted in the other 3 of the 5 ms. Therefore, when the serving cell of the terminal configures the measurement gap, the measurement gap needs to include the SSB transmission time (the measurement gap shown by the solid line in fig. 2), otherwise, the terminal cannot receive the SSB of the NR neighboring cell (the measurement gap shown by the dotted line in fig. 2) in the measurement gap, and thus cannot detect the NR neighboring cell.

Therefore, the serving cell needs to configure the measurement gap at the position covering the time when the neighboring cell transmits the SSB, but in a real network, the position of the measurement gap is referred to the timing of the serving cell, and the position when the neighboring cell transmits the SSB is referred to the timing of the neighboring cell, so that the serving cell and the neighboring cell may not be synchronized. Thus, the network device of the serving cell needs to know the timing offset of the serving cell and the neighboring cell.

Even if the timing offset is known, it may not be possible to configure an appropriate measurement gap. For example, as shown in fig. 3, a serving cell of a terminal is cell 1, cells 2 and 3 are inter-frequency neighboring cells or inter-system neighboring cells of cell 1, and 3 cells are not synchronized, so that half frames for transmitting SSBs by cell 2 and cell 3 are located at different positions in a time domain. The network equipment of cell 1 does not know whether the terminal is at the edge of cell 2 or cell 3, and therefore the network equipment of cell 1 cannot determine whether the measurement gap should be configured at the SSB location of cell 2 or cell 3. As shown in fig. 4, the period of the measurement gap of the terminal is 40ms, i.e. the measurement is performed every 40ms, and each measurement is performed in the measurement gap. The measurement gap of the terminal can only cover the half frame of the cell 2 for sending the SSB and does not cover the half frame of the cell 3 for sending the SSB, so that the terminal cannot measure the SSB of the cell 3 in the measurement gap and can only measure the SSB of the cell 2. If the terminal moves to the edge of the cell 3, the terminal cannot detect the SSB of the cell 3 in the measurement gap, and cannot perform handover to the cell 3.

It can be seen that, when the terminal performs cell measurement on the different frequency or different system, a suitable measurement gap may not be obtained, so that the measurement effect on the neighboring cell is affected, and even the reference signal of the neighboring cell cannot be measured.

Based on this, the embodiments of the present application provide a measurement method, so as to measure reference signals of all neighboring cells of a serving cell where a terminal is located. In the description of the embodiment of the present application, "and/or" describes an association relationship of associated objects, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. At least one of the embodiments referred to in this application means one or more; plural means two or more. In addition, it should be understood that the terms first, second, etc. in the description of the embodiments of the present application are used for distinguishing between the descriptions and not for indicating or implying relative importance or order.

With reference to fig. 5, a process of the inter-frequency or inter-system measurement method provided in the embodiment of the present application is as follows.

In this embodiment of the present application, it is assumed that the terminal operates in a first serving cell, that is, the first serving cell provides a service for the terminal, and the first serving cell may have one or more neighboring cells. In this embodiment of the present application, one of the neighboring cells may also be denoted as a third cell. The terminal may receive, on the first frequency point, measurement reference signals sent by one or more neighboring cells.

In one scenario, the neighboring cell and the first serving cell may belong to cells in the same system, or the neighboring cell and the first serving cell belong to cells in the same system. For example, the first serving cell and the neighboring cell are both NR cells. This scenario is a neighbor measurement belonging to inter-frequency.

Another scenario is a Dual Connectivity (DC) scenario, such as an evolved universal terrestrial radio access network (E-UTRAN) and NR dual connectivity (EN-DC) scenario. The E-UTRAN cell is, for example, an LTE cell, and under EN-DC, the LTE cell is a master cell group or a cell under a master base station or an anchor base station, and the NR cell is a cell of a secondary cell group. The first serving cell may be an NR cell, that is, a cell of the secondary cell group. The terminal also operates in a second serving cell, which is a master cell group cell of the terminal, e.g., an LTE cell. It can be seen that the first serving cell and the second serving cell are two cells of the heterogeneous system. In this scenario, the neighboring cell is an NR cell, both the neighboring cell and the first serving cell are NR cells belonging to a cell of the same system, and the neighboring cell and the second serving cell are cells of different systems. In the EN-DC scenario, when a terminal needs cell handover, it is generally the handover of a primary cell. Therefore, the terminal needs to report the measurement result of the measurement neighboring cell (i.e., the NR cell) to the primary cell (i.e., the second serving cell or the LTE cell). This scenario is a neighbor measurement belonging to a heterogeneous system.

The embodiments of the present application are applicable to any of the above scenarios, and may also be applicable to other scenarios, for example, a dual connectivity (NE-DC) scenario of NR and LTE.

The specific procedure of the measurement method is as follows.

The terminal can acquire the frequency point to be measured first, for example, the network device sends the frequency point to be measured to the terminal as a first frequency point, and the terminal measures the first frequency point according to the indication of the network device. Specifically, a neighbor cell on the first frequency point is measured.

S501, when the terminal needs to measure the first frequency point, if the first frequency point is located in a frequency band of a partial Bandwidth (BWP) activated by a first serving cell of the terminal, receiving a signal of the BWP frequency band through a radio frequency path operating in the BWP frequency band.

Optionally, before S501, S500 may be further performed, where the terminal determines that the first frequency point is located in the frequency band of the BWP activated by the first serving cell.

S502, the terminal determines a signal corresponding to the first frequency point in the BWP frequency band signal.

The terminal may determine whether the first frequency point falls on the frequency band of the BWP activated in the first serving cell, and if so, may convert the measurement of the first frequency point into measurement of the frequency band of the BWP, and obtain the measurement result of the first frequency point from the measurement of the frequency band of the BWP. For example, the terminal may receive the radio frequency signal of the BWP in the whole frequency band, and may obtain the signal of the first frequency point through the filter in the process of processing the radio frequency signal.

In practical applications, the first frequency point to be measured may have a small frequency range, and the terminal may acquire a signal in the small frequency range as the measured signal of the first neighboring cell.

S503, the terminal determines the measurement result of the adjacent cell for sending the measurement reference signal on the first frequency point according to the signal corresponding to the first frequency point.

The signal of the first frequency point received by the terminal may be a reference signal of a neighboring cell. The quality of the reference signal may be used to determine whether to trigger reselection or cell handover. The quality of the reference signal may include any one or more of: reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), signal-to-noise ratio (SNR), SINR, and the like.

After S503, the following steps may be further included to complete cell reselection or cell handover. For example, the terminal reports the quality of the reference signal of the neighboring cell to the network device, and the network device determines whether the terminal needs cell switching according to the content reported by the terminal. If the application scenario is the above-mentioned pilot frequency scenario, that is, the first serving cell and the neighboring cell are both NR cells, but are pilot frequency cells, and the network device here is a network device to which the first serving cell where the terminal is located belongs. If the application scenario is a different system cell, the first serving cell is a secondary cell group cell, and the network device is a network device to which the second serving cell (i.e., a primary cell) belongs.

By the scheme, when the first frequency point to be measured falls within the activated BWP frequency band range of the first serving cell, the measurement of the neighboring cell of the first frequency point is converted into the measurement of the signal in the BWP frequency band. Therefore, the signal of the serving cell can be continuously received, and the reference signal of the adjacent region can be measured without measuring gaps, namely, the signal of the serving cell does not need to be stopped from being received, but the signal of the BWP frequency band is received through the radio frequency path of the BWP frequency band. And the reference signal on the first frequency point can be continuously measured in a longer time without the limitation of a measurement gap, so that the problem that the terminal cannot measure the reference signal of all or part of the adjacent cells because the reference signal is not in the measurement gap is solved, and the performance of measuring the adjacent cells is improved.

Due to the mobile characteristic of the terminal, the measurement is a continuous process, and the measurement results of the adjacent cells may be different at different time. Therefore, the terminal can periodically measure the adjacent region on the first frequency point.

The selectable expression of the measurement method in the time domain provided by the embodiment of the application is as follows.

The terminal may receive a signal of a BWP frequency band in a first measurement window, where a duration of the first measurement window is longer than a period in which a neighboring cell transmits a reference signal on a first measurement frequency.

For example, the reference signal is an SSB, the SSB sent by the neighboring cell may be periodically repeated, and the period size may be configurable, and possible values of the SSB period may be: 5 milliseconds (ms), 10ms, 20ms, 40ms, 80ms, or 160 ms. For SSB for terminal access, a typical value for the periodicity is 20 ms.

The terminal does not know the period of transmitting the SSB by the neighbor cell. The network side configures a period for measuring SSB, for example, SMTC period, for the terminal, and the SMTC period is definitely greater than or equal to the SSB period. The duration of the first measurement window may be set to the period of the SMTC, so that the terminal may receive signals of all neighboring cells of the first frequency point in the first measurement window. For example, the duration of the first measurement window may be set to: 5ms, 10ms, 20ms, 40ms, 80ms, or 160 ms. Since the terminal needs to perform neighbor cell measurement periodically, if the measurement is performed according to the duration of the first measurement window every time, the power consumption of the terminal will be relatively large. The embodiment of the application provides a method for saving power consumption.

And within the duration of the first measurement window, acquiring signals on a first frequency point by receiving signals of a BWP frequency band. Further, the time domain position of the reference signal sent by the neighboring cell on the first frequency point can be determined according to the signal of the first frequency point. Optionally, the terminal may record a list of the neighboring cells, where the list records a correspondence between the identifier of the neighboring cell and the time domain position.

For example, the NR neighbor cell transmission SSB is concentrated in a field, and the field header is fixed in one SSB period, so that the offset value of the neighbor cell transmission reference signal on the first frequency point from the start position of the first measurement window is fixed. The terminal periodically receives the BWP frequency band signal according to a measurement period, and continuously receives the signal in a first measurement period to obtain the time domain position of each neighbor cell sending reference signal. The duration measured in the first measurement period is the duration of the first measurement window. And the terminal determines a second measurement window in each measurement period according to the offset value from the second measurement period according to the time domain position of the reference signal sent by the adjacent cell, which is obtained by measuring the adjacent cell by the first measurement window, and can only receive the signal in the second measurement window according to the determined time domain position of the reference signal sent by the adjacent cell. The second measurement window is a duration during which the BWP band signal is actually received in a measurement period following the first measurement period. The duration of the first measurement window is the duration of the whole measurement period, and the duration of the second measurement window is smaller than or equal to the duration of the first measurement window. If the time domain positions of the reference signals sent by the adjacent cells are different, a plurality of second measurement windows may exist in each subsequent measurement period. The second measurement windows are used for measuring a plurality of adjacent regions with different time domain positions. By the method, the power consumption of the terminal can be saved.

For example, in one SSB period, the NR neighboring cell only transmits SSBs in half frames, and different neighboring cells may transmit SSBs in different half frames or may be the same. There may be a significant portion of the time during the SSB period that the NR neighbor is not sending SSBs. Therefore, in one measurement period, the terminal does not need to receive signals in the time when the neighbor cell does not send the SSB. Therefore, in the measurement period subsequent to the first measurement period, the terminal only needs to receive the BWP band signals at the positions, that is, only needs to measure the neighbor cell in the second measurement window, so as to save the power consumption of the terminal in measuring the neighbor cell.

The measurement period may be greater than or equal to the SMTC period, e.g., the measurement period is an integer multiple of the SMTC.

Of course, the duration of the first measurement window may be different from the duration of the following measurement period. Generally, a measurement period may be set to be M times of a duration of a first measurement window, where M is a positive integer, and when M is 1, a second measurement window is determined according to a starting position of the measurement period and an offset value, for example, the offset value is a distance between a starting time at which a reference signal is sent by a neighboring cell and the starting position of the first measurement window, and the starting position of the measurement period is shifted backward by the offset value to obtain a starting position of the second measurement window; when M is more than 1, the measuring period comprises M sub-periods with equal time length, the time length of each sub-period is equal to that of the first measuring window, and the second measuring window in each sub-period is obtained according to the starting position and the deviation value of the sub-period. For example, the offset value is the distance between the starting time of the reference signal sent by the neighboring cell and the starting position of the first measurement window, and the starting position of the sub-period is shifted backward by the offset value to obtain the starting position of the second window in the sub-period.

If a plurality of adjacent regions are measured in the first measurement window, each adjacent region corresponds to an offset value, and a second measurement window of each adjacent region is correspondingly obtained in a subsequent measurement period. When M is greater than 1, a second measurement window of each neighbor cell may be obtained in each sub-period.

The first measurement window is a part of the first measurement period, i.e. the measurement is not continued during the first measurement period, but is stopped after the end of the first measurement window.

For example, the duration of the first measurement window is the SMTC period length, which may be 20 ms. The length of the measurement period is typically selectable to a value less than or equal to 200 ms. For example, the length of the measurement period is 80 ms. The length of the second measurement window is 5ms, the length of a field. And continuously measuring in the first 20ms of the first 80ms to find the time domain position of each adjacent region, and measuring in the second and subsequent 80ms only in 5ms of the time domain position of each adjacent region.

In this way, the terminal may continuously receive the BWP band signal within 20ms of the first measurement window, and then perform measurement within 5ms of each neighbor cell transmitting the reference signal with 80ms as a measurement period.

Due to the mobility of the terminal, the neighboring cells on the frequency points to be measured may change. Thus, the neighbor cell that the terminal needs to measure may be different from the neighbor cell in the first measurement window. The terminal may periodically perform neighbor cell update according to the update period. An update period includes a first measurement window, and one or more measurement periods. A measurement cycle includes a second measurement window. When a new updating period is reached, the terminal needs to measure the neighboring cells on the frequency points to be measured in the first measurement window and update the neighboring cell list. For example, the update period may be 640 ms.

Since the time for transmitting the SSB by the NR neighboring cell is concentrated within 5ms of a half frame, the duration of the second measurement window may be set to 5 ms. However, in different subcarrier spacing (SCS) and different Frequency Range (FR), the time length actually occupied by the SSB in the half frame where the SSB burst set is located may be less than 5 ms. As shown in table 1, for different SCS and different bandwidth, the SSB actually occupies the number of slots and the number of subframes.

TABLE 1

Based on this, the terminal may determine the actual duration of the second measurement window according to different frequency ranges and durations occupied by SSBs under different CSCs. For example, in the case that FR1 < 3GHz and SCS is 15kHz, the SSB occupies 2 subframes, that is, 2ms, and the terminal may receive, in the measurement period, the signal of the BWP band within 2ms corresponding to each neighbor cell to obtain the reference signal of the neighbor cell.

Therefore, the duration of the second measurement window is less than 5ms, and the power consumption of the terminal can be further saved.

The following describes, by way of example, a representation of the measurement of the terminal in the time domain.

As shown in fig. 6, a first measurement window and a plurality of measurement periods are included in one update period. A plurality of second measurement windows are included in one measurement period. In the first measurement window, the terminal can measure the adjacent region 1 and the adjacent region 2, and may record time domain positions of the adjacent region 1 and the adjacent region 2, for example, the time domain position includes an offset value from a start position of the first measurement window.

The first measurement window may be as long as the measurement period. Of course, it may also be smaller than the length of the measurement period, but the starting position of the measurement period is the same as the starting position of the first measurement window. Therefore, the position of the second measurement window can be determined according to the time domain position of the adjacent cell acquired in the first measurement period in each subsequent measurement period. Fig. 6 illustrates an example in which the first measurement window is smaller than the measurement period.

In each subsequent measurement period, the measurement can be performed only at the positions where the reference signals are transmitted in the adjacent cell 1 and the adjacent cell 2 according to the offset values of the adjacent cell 1 and the adjacent cell 2. And when the next updating period comes, scanning the adjacent cells again, continuously receiving signals in the first measuring window, and finding out the time domain positions of the adjacent cells 1 and 3. It can be found that the neighboring cell 2 is not scanned, the neighboring cell 2 is no longer the neighboring cell of the terminal serving cell, and the neighboring cell of the frequency point to be measured has changed.

The second measurement window in fig. 6 refers to the actual measurement time in the measurement period, and the second measurement window of each neighboring cell may be the same, for example, both are 5 ms. It may also be determined as a value less than or equal to 5ms in terms of SCS and frequency band range.

It should be noted that the examples in the application scenarios in the present application only show some possible implementations, and are for better understanding and description of the method in the present application. Those skilled in the art can obtain some examples of evolution forms according to the sidelink communication method provided by the application.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of a terminal, the perspective of a network device, and the perspective of interaction between the terminal and the network device. In order to implement the functions in the method provided by the embodiments of the present application, the terminal or the network device may include a hardware structure and/or a software module, and implement the functions in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.

As shown in fig. 7, based on the same technical concept, an embodiment of the present application further provides a communication apparatus 700, where the communication apparatus 700 may be a terminal, an apparatus in the terminal, or an apparatus capable of being used in cooperation with the terminal. In one design, the communication apparatus 700 may include a module corresponding to one to perform the method/operation/step/action performed by the terminal in the foregoing method embodiment, where the module may be a hardware circuit, or may be software, or may be implemented by combining a hardware circuit and a software circuit. In one design, the communications apparatus 700 may include a processing module 701 and a communications module 702. The processing module 701 is used to invoke the communication module 702 to perform the receiving and/or transmitting functions.

A communication module 702, configured to, when a first frequency point needs to be measured, if the first frequency point is located in a frequency band of a partial bandwidth BWP activated by a first serving cell of the apparatus, receive a signal of the frequency band of the BWP through a radio frequency path working in the frequency band of the BWP, and send a reference signal on the first frequency point by the neighboring cell.

A processing module 701, configured to determine, in the signals in the BWP frequency band, a signal corresponding to the first frequency point; and the device is used for determining the measurement result of the adjacent region on the first frequency point according to the signal corresponding to the first frequency point.

The communication module 702 is further configured to perform other receiving or transmitting steps or operations performed by the terminal in the above method embodiments. The processing module 701 may also be configured to perform other corresponding steps or operations, except for transceiving, performed by the terminal in the foregoing method embodiment, which is not described in detail herein.

The division of the modules in the embodiments of the present application is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

Fig. 8 shows a communication apparatus 800 according to an embodiment of the present application, configured to implement the functions of the terminal in the foregoing method. The communication device may be a terminal or a network device, or may be a device in the terminal, or may be a device capable of being used in cooperation with the terminal. The communication device 800 may be a chip system. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. The communication apparatus 800 includes at least one processor 820 for implementing the functions of the terminal or the network device in the methods provided by the embodiments of the present application. Communications device 800 may also include a communications interface 810. In embodiments of the present application, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface for communicating with other devices over a transmission medium. For example, communication interface 810 is used for devices in communication device 800 to communicate with other devices.

Exemplarily, when the communication apparatus 800 is used to perform the operations performed by the terminal:

a processor 820, configured to receive, by using the communication interface 810, a signal of a partial bandwidth BWP activated by a first serving cell of the apparatus through a radio frequency path operating in the BWP, when a first frequency point needs to be measured, if the first frequency point is located in the BWP band. The processor 820 is further configured to determine, in the signals of the BWP frequency band, signals corresponding to the first frequency point; and the device is used for determining the measurement result of the adjacent cell on the first frequency point according to the signal corresponding to the first frequency point, and the adjacent cell sends a reference signal on the first frequency point.

The processor 820 and the communication interface 810 may also be configured to perform other corresponding steps or operations performed by the terminal according to the foregoing method embodiments, which are not described in detail herein.

The communications apparatus 800 can also include at least one memory 830 for storing program instructions and/or data. The memory 830 is coupled with the processor 820. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The processor 820 may operate in conjunction with the memory 830. Processor 820 may execute program instructions stored in memory 830. At least one of the at least one memory may be included in the processor.

The specific connection medium among the communication interface 810, the processor 820 and the memory 830 is not limited in the embodiments of the present application. In fig. 8, the memory 830, the processor 820 and the communication interface 810 are connected by a bus 870, the bus is represented by a thick line in fig. 8, and the connection manner among other components is only schematically illustrated and is not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus.

When the communication apparatus 700 and the communication apparatus 800 are specifically chips or chip systems, the signals output or received by the communication module 702 and the communication interface 810 may be baseband signals. When the apparatus 700 and the apparatus 800 are embodied as devices, the output or the reception of the communication module 702 and the communication interface 810 may be radio frequency signals.

In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

In the embodiment of the present application, the memory 830 may be a non-volatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory (RAM), for example, a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

Some or all of the operations and functions performed by the terminal described in the above method embodiments of the present application may be implemented by a chip or an integrated circuit.

In order to implement the functions of the communication device described in fig. 7 or fig. 8, an embodiment of the present application further provides a chip, which includes a processor and is configured to support the communication device to implement the functions related to the terminal in the foregoing method embodiments. In one possible design, the chip is connected to or includes a memory for storing the necessary program instructions and data of the communication device.

The embodiment of the application provides a computer readable storage medium, which stores a computer program, wherein the computer program comprises instructions for executing the method embodiment.

Embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the above-described method embodiments.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims

1. A method for inter-frequency or inter-system measurement, comprising:

when a terminal needs to measure a first frequency point, if the first frequency point is located in a frequency band of a part of bandwidth BWP activated by a first service cell of the terminal, receiving a signal of the frequency band of the BWP through a radio frequency channel working in the frequency band of the BWP;

wherein: the first serving cell and a third cell which sends a reference signal on the first frequency point are pilot frequency cells, and the third cell is a neighboring cell of the first serving cell; or, a second serving cell of the terminal and the third cell are different system cells, the second serving cell is a primary cell of the terminal, and the first serving cell is a secondary cell of the terminal;

the terminal determines a signal corresponding to the first frequency point in the BWP frequency band signal;

and the terminal determines the measurement result of the third cell according to the signal corresponding to the first frequency point.

2. The method of claim 1, wherein receiving the signal of the BWP band comprises:

and the terminal receives the signal of the BWP frequency band in a first measurement window, wherein the duration of the first measurement window is greater than or equal to the period of sending the reference signal by the third cell on the first frequency point.

3. The method of claim 2, wherein a duration of the first measurement window configures a period of the SMTC for a synchronized broadcast signal block measurement time.

4. The method of claim 2 or 3, wherein the method further comprises:

the terminal determines a time domain position of the third cell for sending a reference signal on the first frequency point according to the signal corresponding to the first frequency point, wherein the time domain position comprises an offset value from the initial position of the first measurement window;

the method further comprises the following steps:

the terminal determines a second measurement window according to the offset value in each measurement period in at least one measurement period after the first measurement window; when M is greater than 1, the measurement period comprises M sub-periods with equal length, the duration of each sub-period is equal to that of the first measurement window, and the second measurement window in each sub-period is obtained according to the starting position of the sub-period and the offset value;

and the terminal measures the reference signal sent by the third cell on the first frequency point in the second measurement window.

5. The method of claim 4, wherein the duration of the second measurement window is 5 ms.

6. The method of claim 4, wherein a duration of the second measurement window is a duration occupied by the neighboring cell for transmitting the reference signal, and the duration occupied by the neighboring cell for transmitting the reference signal is less than 5 ms.

7. A communications apparatus, comprising:

a communication module, configured to receive, when the communication apparatus needs to measure a first frequency point, a signal of a BWP band through a radio frequency path operating in the BWP band if the first frequency point is located in a frequency band of a partial bandwidth BWP activated by a first serving cell of the apparatus; wherein: a third cell, which is used by the first serving cell to send the reference signal on the first frequency point, is a pilot frequency cell, and the third cell is a neighboring cell of the first serving cell; or, a second serving cell of the terminal and the third cell are different system cells, the second serving cell is a primary cell of the terminal, and the first serving cell is a secondary cell of the terminal;

the processing module is used for determining a signal corresponding to the first frequency point in the BWP frequency band signal; and the measuring result of the third cell is determined according to the signal corresponding to the first frequency point.

8. The apparatus of claim 7, wherein the communication module, when receiving the signal of the BWP band, is specifically configured to:

and receiving a signal of the BWP frequency band in a first measurement window, wherein the duration of the first measurement window is greater than or equal to the period of sending a reference signal on the first frequency point by the third cell.

9. The apparatus of claim 8, wherein the processing module is further to:

determining a time domain position of the third cell for sending a reference signal on the first frequency point according to the signal corresponding to the first frequency point, wherein the time domain position comprises an offset value from the initial position of the first measurement window;

determining a second measurement window in accordance with the offset value in each measurement period during at least one measurement period following the first measurement window; and the second measurement window is used for measuring the reference signal sent by the third cell on the first frequency point; when M is greater than 1, the measurement period comprises M sub-periods with equal length, the duration of each sub-period is equal to that of the first measurement window, and the second measurement window in each sub-period is obtained according to the starting position of the sub-period and the offset value.

10. The apparatus of claim 9, wherein the duration of the second measurement window is 5 ms.

11. The apparatus of claim 9, wherein a duration of the second measurement window is a duration occupied by the neighboring cell for sending the reference signal, and the duration occupied by the neighboring cell for sending the reference signal is less than 5 ms.

12. The method of any one of claims 7 to 11, wherein the duration of the first measurement window configures a period of the SMTC for a synchronized broadcast signal block measurement time.

13. A communications apparatus, comprising: a processor coupled with a memory, the memory for storing a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 1-6.

14. A computer-readable storage medium having computer-readable instructions stored thereon, wherein the method of any one of claims 1-6 is performed when the computer-readable instructions are run on a communication device.