CN113473517B

CN113473517B - Measurement method and device for different frequencies or different systems

Info

Publication number: CN113473517B
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: 2023-06-27
Anticipated expiration: 2040-03-31
Also published as: CN113473517A

Abstract

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

Description

Measurement method and device for different frequencies or different systems

Technical Field

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

Background

In a mobile communication system, measurement is a common and important procedure. For example, when the terminal is in an idle state, the terminal determines whether to reselect to a neighbor cell by measuring signal quality of a serving cell and a neighbor cell; for another example, when the terminal is in a connection state, the terminal measures signal quality of the serving cell and the neighbor cell and reports the signal quality to the network device, and the network device determines and triggers the terminal to switch to the neighbor cell according to the measured value of each cell reported by the terminal. A terminal in a connected state may need a measurement gap (measurement gap) when performing measurement of a neighboring cell of a different frequency or a different system. And 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 the existing fifth generation (5th generation,5G) new air interface (NR) communication system, the primary synchronization signal (primary synchronization signal, PSS), the secondary synchronization signal (secondary synchronization signal, SSS), and the physical broadcast channel (physical broadcast channel, PBCH) are referred to as synchronization signal/broadcast signal blocks (synchronization signal/PBCH block, SS/PBCH block). For convenience of description, SS/PBCH block is referred to as SSB. A cell of an NR will send multiple SSBs within one period, each covering a certain area, each SSB being sent in a protocol defined SSB candidate (candidates) location. All SSB candates are located within one half frame (5 milliseconds). If the terminal can accurately measure the SSB of the neighboring cell, the time domain position of the SSB needs to fall within the measurement gap.

However, in the actual network, the measurement gap configured by the serving cell for the terminal may not necessarily 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, affect the measurement performance, and may not correctly implement reselection or handover.

Disclosure of Invention

The embodiment of the application provides a measurement method and device of different frequencies or different systems, which aim to solve the problem that a terminal cannot measure SSB of an NR neighbor cell in a measurement gap.

In a first aspect, a measurement method is provided that may be applied to a terminal, or to an apparatus associated with a terminal. The method can be realized by the following steps: when a first frequency point is required to be measured, 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 service cell and a third cell for transmitting a reference signal on the first frequency point are different frequency cells, and the third cell is a neighboring cell of the first service cell; or the second service cell and the third cell of the terminal are different system cells, the second service cell is a main cell of the terminal, and the first service cell is a secondary cell of the terminal; the terminal determines a signal corresponding to the first frequency point in the signals of the BWP frequency band; 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 the serving 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 to measure the reference signal sent by the neighboring cell on the first frequency point.

When the first frequency point to be measured is in the BWP frequency band range activated by the first service cell, the neighbor cell measurement of the first frequency point is converted into measurement of the signal in the BWP frequency band. Thus, the measurement gap is not needed, namely, the reception of the signal of the serving cell is not needed to be stopped, but the signal of the frequency band of the BWP is received through the radio frequency path working in the frequency band of the BWP, so that the signal of the serving cell can be continuously received, and the reference signal of the adjacent cell can be measured. And the limitation of the measurement gap is avoided, and the reference signal on the first frequency point can be continuously measured for a long time, so that the problem that the terminal cannot measure the reference signal of all or part of adjacent cells due to the fact that the reference signal is not in the measurement gap is solved, and the measurement performance of the adjacent cells is improved.

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

In one possible design, receiving the signal of the frequency band of the BWP includes: the terminal receives signals of the frequency band of the BWP in a first measurement window, wherein the time length of the first measurement window is larger than or equal to the period of the third cell for transmitting reference signals on the first frequency point. For example, the duration of the first measurement window is the period of the SSB measurement time configuration (SSB measurement time configuration, SMTC). The period of SMTC is the period for the network device to notify the terminal to measure SSB and is generally not less than the period of SSB.

In one possible design, the terminal may further determine, according to the signal corresponding to the first frequency point, a time domain position of the reference signal sent by the third cell on the first frequency point, where the time domain position includes an offset value from a start position of the first measurement window. In practical applications, different neighboring cells may send different positions of the reference signal, and then the terminal may obtain multiple offset values. In this way, the terminal may also determine, in each measurement period, a second measurement window according to the offset value during at least one measurement period following the first measurement window; the duration of the second measurement window is smaller than that of the first measurement window, the measurement period is M times of that of the first measurement window, M is a positive integer, and when M=1, the second measurement window is determined according to the initial position of the measurement period and the offset value; when M is more than 1, the measurement period comprises M sub-periods with equal time length, the time length of each sub-period is equal to the time length 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. Therefore, the terminal does not need to measure all the time in the measurement 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, may be a little longer than the first measurement window, e.g. the measurement period is m times the first measurement window, m being a positive integer.

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

Alternatively, the duration that the NR neighbor cell transmits SSB actually occupies in the field may be less than 5ms at different SCS or different frequency ranges. In this way, the terminal can determine the duration actually occupied by the third cell for transmitting the SSB according to different SCS or different frequency ranges, where the duration of the second measurement window is the duration occupied by the third cell for transmitting the reference signal, and the duration occupied by the third cell for transmitting the reference signal is less than 5ms. 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 in a terminal (e.g. a chip, or a system on a chip, or a circuit), or a device that can be used in a matching manner with a terminal. In one design, the communication device may include modules corresponding to the methods/operations/steps/actions described in the first aspect, where the modules may be hardware circuits, software, or a combination of hardware circuits 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 transmitting function. Illustratively: the communication module is configured to, when a first frequency point needs to be measured, receive a signal of a frequency band of the BWP through a radio frequency path working in the frequency band of the BWP if the first frequency point is located in the frequency band of the partial bandwidth BWP activated by the first serving cell of the terminal; wherein: the first service cell and a third cell for transmitting a reference signal on the first frequency point are different frequency cells, and the third cell is a neighboring cell of the first service cell; or the second service cell and the third cell of the terminal are different system cells, the second service cell is a main cell of the terminal, and the first service cell is a secondary cell of the terminal; a processing module, configured to determine, from signals of the BWP frequency band, a signal corresponding to the first frequency point; and determining a measurement result of the first cell according to the signal corresponding to the first frequency point.

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

In one possible design, the communication module may specifically receive the signal of the BWP frequency band within a first measurement window when receiving the signal of the BWP frequency band, where the time period of the first measurement window is greater than or equal to the period during which the neighbor 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 SMTC is the period for the network device to notify the terminal to measure SSB and is generally not less than the period of 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 of the reference signal sent by the third cell on the first frequency point, where the time domain position includes an offset value from a start position of the first measurement window. In practical applications, different neighboring cells may send different positions of the reference signal, and then the terminal may obtain multiple offset values. The processing module is further configured to determine, in each measurement period, a second measurement window according to the offset value in at least one measurement period after the first measurement window, 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 smaller than that of the first measurement window, the measurement period is M times of that of the first measurement window, M is a positive integer, and when M=1, the second measurement window is determined according to the initial position of the measurement period and the offset value; when M is more than 1, the measurement period comprises M sub-periods with equal time length, the time length of each sub-period is equal to the time length 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.

Therefore, the terminal does not need to measure all the time in the measurement 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 a little longer than the first measurement window, for example, the measurement period is M times the first measurement window, and M is a positive integer.

Alternatively, the duration that the NR neighbor cell transmits SSB actually occupies in the field may be less than 5ms at different SCS or different frequency ranges. In this way, the terminal can determine the duration actually occupied by the neighbor cell for transmitting the SSB according to different SCS or different frequency ranges, wherein the duration of the second measurement window is the duration occupied by the neighbor cell for transmitting the reference signal, and the duration occupied by the neighbor cell for transmitting the reference signal is less than 5ms. This can further save power consumption of the terminal.

In a third aspect, a communication apparatus is provided that includes a communication interface for communicating, such as for transceiving data or signals, with other devices, and a processor. By way of example, 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 configured 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 for by the processor. The memory is coupled to the processor, and the processor may implement the method described in the first aspect when executing the instructions or data stored in the memory.

In a fourth aspect, embodiments of the present application also provide a computer-readable storage medium having stored therein computer-readable instructions which, when run on a computer, cause the 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, embodiments of the present application provide a chip system, where the chip system includes a processor and may further include a memory, 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 of a chip or may include a chip and other discrete devices.

In a sixth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method as described in the first aspect or any 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 an embodiment of the present application;

FIG. 2 is a diagram illustrating the relationship between measurement gap and SSB in one embodiment of the present application;

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

FIG. 4 is a diagram illustrating measurement gap versus SSB in another embodiment of the present application;

FIG. 5 is a flow chart of a measurement method of different frequencies or different systems according to an embodiment of the present application;

FIG. 6 is a schematic diagram illustrating an example of a measurement method of different frequencies or different systems according to an embodiment of the present application;

FIG. 7 is a schematic 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 according to an embodiment of the present application.

Detailed Description

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

The measurement method of the pilot frequency or the inter-system provided in the embodiments of the present application may be applied to a fourth generation (4th generation,4G) communication system, for example, long term evolution (long term evolution, LTE), and may also be applied to a fifth generation (5th generation,5G) communication system, for example, a 5G New Radio (NR), or applied to various future communication systems. The embodiments of the present application are applicable to time-division duplex (TDD) cells. And 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, a communication system 100 includes: a network device 101 and one or more terminals 102. Network device 101 serves 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 (radio access network, RAN), which may also be referred to as a base station, and which may also be referred to as a RAN node (or device). Currently, some examples of network devices 101 are: the network device 101 may also be a satellite, which may also be referred to as a high altitude platform, an aerial vehicle, or a satellite base station (AP), a next generation base station (next generation nodeB, gNB), a next generation evolved base station (next generation evolved nodeB, ng-eNB), a transmission reception point (transmission reception point, TRP), an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), or a wireless fidelity (wireless fidelity, wifi) Access Point (AP). The network device 101 may also be other devices having network device functions, for example, the network device 101 may also be a device functioning as a network device in D2D communication. Network device 101 may also be a network device in a future possible communication system.

In some deployments, the network device may include Centralized Units (CUs) and Distributed Units (DUs). The network device may also include an active antenna unit (active antenna unit, AAU). The CUs implement part of the functions of the network device, the DUs implement part of the functions of the network device, e.g. the CUs are responsible for handling non-real time protocols and services, implementing radio resource control (radio resource control, RRC), packet data convergence layer protocol (packet data convergence protocol, PDCP) layer functions. The DUs are responsible for handling physical layer protocols and real-time services, implementing the functions of the radio link control (radio link control, RLC), medium access control (media access control, MAC) and Physical (PHY) layers. The AAU realizes part of physical layer processing function, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer may eventually become information of the PHY layer or be converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the du+aau. It is 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 (radio 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 known as a 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, an in-vehicle device, and the like having a wireless connection function. Currently, the terminal 102 may be: a mobile phone, a tablet, a laptop, a palmtop, a mobile internet device (mobile internet device, MID), a wearable device (e.g., a smartwatch, a smartband, a pedometer, etc.), a vehicle-mounted device (e.g., an automobile, a bicycle, an electric car, an airplane, a ship, a train, a high-speed rail, etc.), a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in an industrial control (industrial control), a smart home device (e.g., a refrigerator, a television, an air conditioner, an electric meter, etc.), a smart robot, a workshop device, a wireless terminal in a drone (self driving), a wireless terminal in a teleoperation (remote medical surgery), a wireless terminal in a smart grid (smart grid), a wireless terminal in a transportation security (transportation safety), a wireless terminal in a smart city (smart city), or a wireless terminal in a smart home (smart home), a flying device (e.g., a smart robot, a hot balloon, an airplane, etc. The terminal 102 may also be other devices with terminal functions, for example, the terminal 102 may also be a terminal functioning as a terminal in D2D communication.

As shown in fig. 1b, a possible architecture of the terminal 102 is illustrated below.

The terminal 102 mainly involves some or all of the following components: a memory, a processor, a Transmit (TX) signal processing unit, and a Receive (RX) signal processing unit. Wherein, TX signal processing unit and RX signal processing unit pass through the communication link and connect.

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 signals in a predefined manner.

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

The RX signal processing unit performs various signal processing functions for 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 radio frequency channel demodulates the radio frequency signal received from the antenna into a baseband signal, and the baseband signal is processed by an RX signal processing unit.

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

In this embodiment, the measurement signals of the serving cell and the neighboring cell are mainly received through the RX radio frequency channel, and the measurement signals, such as SSB signals, are sent to the RX signal processing unit to calculate the signal quality of the serving cell and the neighboring cell. When the terminal detects that the signal quality of the service cell and the neighbor cell meets the measurement reporting condition, the terminal reports the measurement result to the network equipment through an RRC signaling measurement report (Measurementreport).

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

When the terminal measures the neighbor cell, a reference signal from the neighbor cell may be received, 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 the following: reference signal received power (reference signal received power, RSRP), reference signal received quality (reference signal received quality, RSRQ), signal-to-noise ratio SNR, signal-to-interference-and-noise ratio (signal to interference plus noise ratio, SINR), and the like.

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

In some scenarios, the terminal needs to measure the reference signal of the neighboring cell with a measurement gap. For example, when a serving cell and a neighbor cell of a terminal are different frequencies/different systems. In this scenario, when the terminal is in RRC CONNECTED (rrc_connected) state, the terminal needs to keep the radio frequency channel operating at the frequency point where the serving cell is located. If the terminal does not have an additional radio frequency channel to work on the frequency point of the inter-frequency/inter-system cell, the signal of the service cell and the signal of the inter-frequency/inter-system cell cannot be received at the same time, and then a measurement gap is needed for a period of time. In the measurement gap, the terminal can stop receiving signals on the service cell, adjust the radio frequency channel to work at the frequency point of the inter-frequency/inter-system cell, receive signals of the inter-frequency/inter-system cell, and finish the measurement of the adjacent cell.

In general, a periodic transmission method is adopted in the neighbor cell when the reference signal is transmitted. The reference signal is transmitted for a period of time within one period. Also, the times at which different neighbor cells transmit reference signals may not be aligned. When the terminal measures the reference signals of the adjacent cells, the terminal can only receive the reference signals of the adjacent cells if the time of the adjacent cells for transmitting the reference signals falls in the measurement gap of the terminal or if the time of the adjacent cells for transmitting the reference signals is intersected with the measurement gap of the terminal. However, as described above, the times at which the neighbor cells transmit the reference signals may not be aligned, and thus, the terminal may not receive the reference signals of all the neighbor cells, or even the reference signals of any neighbor cells, within the measurement gap.

Taking an adjacent cell of a service cell where the terminal is located as an NR cell (simply referred to as an NR adjacent cell) as an example, a reference signal sent by the NR adjacent cell is SSB. In the time domain, one SSB contains four orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols. The terminal determines SSB block index (block index) together by different demodulation reference signal (demodulation reference Signal, DMRS) sequences and index numbers (index) transmitted in PBCH, for identifying different SSBs. The method for determining the block index of a specific SSB is well known to those skilled in the art and will not be described in detail. In NR, the transmission of the synchronization signal is performed by beam scanning. The network device may send multiple SSBs within a period, each covering an area, each SSB being sent in a protocol-defined SSB candidate (candidates) location. All SSB candidates are located within one field (5 ms), and SSBs transmitted concentrated within one field form one SSB cluster (SSB burst set). In this application, SSB candidates positions refer to symbol positions in the time domain.

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

As shown in fig. 2, it is assumed that SSB periods are 20ms, there are 4 5ms in one period, and all SSBs in one SSB burst set are transmitted in 1 of the 5ms, and no SSBs are transmitted in the other 3 5 ms. Therefore, when the serving cell of the terminal configures the measurement gap, the measurement gap needs to include the SSB sending time (as shown by the solid line in fig. 2), otherwise, the terminal will not receive the SSB of the NR neighboring cell in the measurement gap (as shown by the broken line in fig. 2), so that the NR neighboring cell cannot be detected.

Therefore, the serving cell needs to configure the measurement gap at a position covering the time when the neighbor cell transmits the SSB, but in a real network, the position of the measurement gap is referenced to the timing of the serving cell, and the position of the neighbor cell transmitting the SSB is referenced to the timing of the neighbor cell, and there may be a case where the serving cell and the neighbor cell are not synchronized. Thus, the network device of the serving cell needs to know the timing offset of the serving cell and the neighbor cells.

Even if the timing deviation is known, a suitable measurement gap may not be configured. For example, as shown in fig. 3, the serving cell of the terminal is cell 1, and cell 2 and cell 3 are inter-frequency neighbors or inter-system neighbors of cell 1, and 3 cells are not synchronized, so that the half frames of transmitting SSBs of cell 2 and cell 3 are located at different positions in the time domain. The network device of cell 1 does not know whether the terminal is at the edge of cell 2 or at the edge of cell 3, and therefore the network device of cell 1 cannot determine whether the measurement gap should be configured at the SSB location of cell 2 or at the SSB location of cell 3. As shown in fig. 4, the period of the measurement gap of the terminal is 40ms, i.e. every 40ms, each measurement is implemented within the measurement gap. The measurement gap of the terminal only covers the half frame of transmitting SSB of cell 2, and does not cover the half frame of transmitting SSB of cell 3, so that the terminal cannot measure SSB of cell 3 and can only measure SSB of cell 2 in the measurement gap. If the terminal moves to the edge of cell 3, the terminal cannot detect SSB of cell 3 in the measurement gap, and cannot realize handover to cell 3.

It can be seen that when the terminal measures cells of different frequencies or different systems, a proper measurement gap may not be obtained, so that the measurement effect on the neighboring cells is affected, and even the reference signals of the neighboring cells cannot be measured.

Based on this, the embodiment of the application provides a measurement method, so as to be able to measure reference signals of all neighboring cells of the serving cell where the terminal is located. In the description of the embodiment of the present application, "and/or" describing the association relationship of the association object indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. At least one of the embodiments herein refers to one or more; plural means two or more. In addition, it should be understood that in the description of embodiments of the present application, the words "first," "second," and the like are used merely for distinguishing between the descriptions and not be construed as indicating or implying a relative importance or order.

Referring to fig. 5, the procedure of the measurement method of the different frequency or different system provided in the embodiment of the present application is as follows.

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

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

Another scenario is a dual connectivity (dual connectivity, DC) scenario, for example, an evolved universal terrestrial radio network (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, which is a primary cell group or a cell under a primary base station or an anchor base station under EN-DC, 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 primary 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 a heterogeneous system. In this scenario, the neighboring cell is an NR cell, both the neighboring cell and the first serving cell are NR cells, which belong to cells 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 a cell handover, it is typically a handover of the primary cell. Therefore, the terminal needs to report the measurement result of the measurement neighbor cell (i.e., NR cell) to the primary cell (i.e., the second serving cell or LTE cell). This scenario is a neighbor measurement belonging to a different system.

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

The specific procedure of the measurement method is as follows.

The terminal may first acquire a frequency point to be measured, 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, the neighbor cell on the first frequency point is measured.

And S501, when the terminal needs to measure the first frequency point, if the first frequency point is located in a frequency band of a part of Bandwidth (BWP) activated by a first serving 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.

Optionally, S500 may also be performed before S501, 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 a first frequency point in signals of a frequency band of BWP.

The terminal may determine whether the first frequency point falls in a frequency band of the BWP activated by the first serving cell, if so, may convert the measurement of the first frequency point into the measurement of the frequency band of the BWP, and obtain a 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 whole BWP frequency band, and may acquire 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 a measurement result of a neighboring cell transmitting 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 a reselection or a cell switch. The quality of the reference signal may include any one or more of the following: reference signal received power (reference signal received power, RSRP), reference signal received quality (reference signal received quality, RSRQ), signal-to-noise ratio SNR, signal-to-interference-and-noise ratio (signal to interference plus noise ratio, SINR), and the like.

After S503, the following steps may also be 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 inter-frequency scenario, that is, the first serving cell and the neighboring cell are both NR cells, but are inter-frequency cells, where the network device is a network device to which the first serving cell where the terminal is located belongs. If the application scenario is a heterogeneous system cell, the first service cell is a secondary cell group cell, and the network device is a network device to which the second service cell (i.e., the primary cell) belongs.

According to the scheme, when the first frequency point to be measured falls in the BWP frequency band range activated by the first service cell, the neighbor cell measurement of the first frequency point is converted into the measurement of the signal in the BWP frequency band. Thus, the measurement gap is not needed, namely, the reception of the signal of the serving cell is not needed to be stopped, but the signal of the frequency band of the BWP is received through the radio frequency path working in the frequency band of the BWP, so that the signal of the serving cell can be continuously received, and the reference signal of the adjacent cell can be measured. And the limitation of the measurement gap is avoided, and the reference signal on the first frequency point can be continuously measured for a long time, so that the problem that the terminal cannot measure the reference signal of all or part of adjacent cells due to the fact that the reference signal is not in the measurement gap is solved, and the measurement performance of the adjacent cells is improved.

Due to the mobile nature of the terminal, the measurement is a continuous process and the measurement results for the neighbor cells may be different at different times. Therefore, the terminal can periodically measure the neighbor cell on the first frequency point.

Alternative manifestations of the measurement method provided by the embodiments of the present application in the time domain are as follows.

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

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

The terminal does not know the period of SSB transmission by the neighbor. The network side configures the terminal with a period for measuring SSB, for example, SMTC period, which is necessarily greater than or equal to SSB period. The duration of the first measurement window may be set to be the SMTC period, so that the terminal receives 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 160ms. Since the terminal needs to periodically perform neighbor cell measurement, if the measurement is performed according to the duration of the first measurement window each time, the power consumption of the terminal will be relatively large. The embodiment of the application provides a method for saving power consumption.

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

For example, the NR neighbor cell transmission SSBs are concentrated in a field, and the field header is fixed in one SSB period, and then 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 band signal according to the measurement period, and continuously receives the signal in the first measurement period to obtain the time domain position of the reference signal transmitted by each neighbor cell. The duration measured in the first measurement period is the duration of the first measurement window. The terminal determines a second measurement window according to the offset value in each measurement period from the second measurement period according to the time domain position of the neighbor cell transmitting reference signal obtained by measuring the neighbor cell in the first measurement window, and can receive signals only in the second measurement window according to the determined time domain position of the neighbor cell transmitting reference signal. The second measurement window is a duration in which the BWP band signal is actually received in a measurement period subsequent to the first measurement period. The duration of the first measurement window is the duration of the whole measurement period, and the second measurement window is smaller than or equal to the first measurement window. If the time domain positions of the reference signals transmitted by the respective neighbor cells are different, there may be a plurality of second measurement windows in each subsequent measurement period. The plurality of second measurement windows are used for measuring a plurality of adjacent cells 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 neighbor cell transmits SSB only in a field, and the fields in which different neighbor cells may transmit SSB are different or the same. A significant portion of the time during the SSB period the NR neighbors are not transmitting SSBs. Thus, in one measurement period, the terminal does not need to receive a signal in a time when the neighbor cell does not transmit the SSB. Through the first measurement period, it can know which positions each neighbor cell sends SSB, so in the subsequent measurement period of the first measurement period, the terminal only needs to receive BWP frequency band signals at the positions, namely only measures the neighbor cell in the second measurement window, thus saving the power consumption of the terminal for 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 SMTC.

Of course, the duration of the first measurement window may be different from the duration of the subsequent measurement period. Generally, the measurement period may be set to be M times of the duration of the first measurement window, where M is a positive integer, and when m=1, the second measurement window is determined according to the start position of the measurement period and an offset value, for example, the offset value is a distance between the start time of the neighbor cell transmitting the reference signal and the start position of the first measurement window, and the start position of the measurement period is shifted backward by the offset value to obtain the start position of the second 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 the time length of the first measuring window, and the second measuring window in each sub-period is obtained according to the starting position and the offset value of the sub-period. For example, the offset value is the distance between the starting time of the neighbor cell transmitting the reference signal 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 cells are measured in the first measurement window, each adjacent cell corresponds to an offset value, and in the subsequent measurement period, a second measurement window of each adjacent cell is correspondingly obtained. When M is greater than 1, a second measurement window for each neighbor cell may be obtained in each subcycle.

The first measurement window is then part of the first measurement period, i.e. no measurements are made all the time during the first measurement period, but the measurement is stopped after the end of the first measurement window.

For example, the duration of the first measurement window is SMTC period length, which may be 20ms. The length of the measurement period is typically a selectable value of less than or equal to 200ms. For example, the length of the measurement period is 80ms. The length of the second measurement window is 5ms, i.e. the length of the half frame. The measurement is continued for the first 20ms in the first 80ms, the time domain position of each neighbor is found, and the measurement is performed for the second and subsequent 80ms, only for 5ms of the time domain position of each neighbor.

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

Due to mobility of the terminal, the neighbor cell on the frequency point to be measured may change. In this way, the neighbor cell that the terminal needs to measure may be different from the neighbor cell within 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 second measurement window is included in a measurement period. When a new update period arrives, the terminal needs to measure the neighbor cell on the frequency point to be measured in the first measurement window, and update the neighbor cell list. For example, the update period may be 640ms.

Since the time for the NR neighbor to transmit the SSB is concentrated within 5ms of the half frame, the duration of the second measurement window may be set to 5ms. But at different subcarrier spacings (subcarrier spacing, SCS) and different Frequency Ranges (FR), the duration actually occupied by SSB in the field where SSB burst set is located may be less than 5ms. As shown in table 1, for different SCS and different bandwidths, the number of slots and the number of subframes actually occupied by SSB.

TABLE 1

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

Thus, 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, the representation of the measurement of the terminal in the time domain.

As shown in fig. 6, the first measurement window and the 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 neighboring cell 1 and the neighboring cell 2, and the time domain positions of the neighboring cell 1 and the neighboring cell 2 can be recorded, for example, the time domain positions include an offset value from the starting position of the first measurement window.

The first measurement window may be of equal length to the measurement period. Of course, it is also possible to have a smaller length than the measuring period, but the starting position of the measuring period is the same as the starting position of the first measuring window. In this way, the position of the second measurement window can be determined according to the time domain position of the neighboring cell acquired in the first measurement period in each subsequent measurement period. Fig. 6 exemplifies that the first measurement window is smaller than the measurement period.

In each subsequent measurement period, measurement can be performed only at the positions where the neighbor cell 1 and the neighbor cell 2 transmit reference signals according to the offset values of the neighbor cell 1 and the neighbor cell 2. And when the next updating period comes, scanning the adjacent cells again, continuously receiving signals in a first measuring window, and finding 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 a 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 time actually measured in the measurement period, and the second measurement window of each neighbor cell may be the same, for example, all 5ms. A value of less than or equal to 5ms may also be determined in terms of SCS and frequency range.

It should be noted that examples in various application scenarios in this application merely represent some possible implementations, for better understanding and explanation of the method of this application. One skilled in the art can take some evolutionary examples of the side-link communication methods provided by the application.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is described from the point of view of the terminal and the point of view of the network device, and the point of view of interaction between the terminal and the network device. In order to implement the functions in the methods provided in the embodiments of the present application, the terminal or the network device may include a hardware structure and/or a software module, where the functions are implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module. Some of the functions described above are performed in a hardware configuration, a software module, or a combination of hardware and software modules, depending on the specific application of the solution and design constraints.

As shown in fig. 7, based on the same technical concept, the embodiment of the present application further provides a communication device 700, where the communication device 700 may be a terminal, a device in the terminal, or a device that can be used in a matching manner with the terminal. In one design, the communication device 700 may include modules corresponding to each other in a manner of executing the methods/operations/steps/actions executed by the terminal in the above method embodiments, where the modules may be implemented by using hardware circuits, software, or a combination of hardware circuits and software. In one design, the communication device 700 may include a processing module 701 and a communication module 702. The processing module 701 is configured to invoke the communication module 702 to perform a function of receiving and/or transmitting.

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

A processing module 701, configured to determine a signal corresponding to the first frequency point from signals of the frequency band of the BWP; and the measuring result of the neighbor cell on the first frequency point is determined according to the signal corresponding to the first frequency point.

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

The division of the modules in the embodiments of the present application is schematically only one logic function division, and there may be another division manner in actual implementation, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, or may exist separately and physically, or two or more modules may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules.

Fig. 8 shows a communication device 800 provided in an embodiment of the present application, which is configured to implement the functions of the terminal in the above 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 that can be used in cooperation with the terminal. The communication device 800 may be a system-on-chip. In the embodiment of the application, the chip system may be formed by 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 a terminal or a network device in the method provided in the embodiments of the present application. The communication device 800 may also include a communication 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, the communication interface 810 is used to enable devices in the communication device 800 to communicate with other equipment.

Illustratively, when the communications apparatus 800 is configured to perform operations performed by a terminal:

processor 820 is configured to receive, when a first frequency point is needed to measure, a signal of a frequency band of the BWP through a radio frequency path operating in the frequency band of the BWP by using communication interface 810 if the first frequency point is located in the frequency band of the partial bandwidth BWP activated by the first serving cell of the apparatus. Processor 820 is further configured to determine a signal corresponding to the first frequency point from among signals of the frequency band of the BWP; and determining a measurement result of a neighboring cell on the first frequency point according to the signal corresponding to the first frequency point, wherein the neighboring cell sends a reference signal on the first frequency point.

Processor 820 and communication interface 810 may also be configured to perform other corresponding steps or operations performed by the terminal in the method embodiment described above, which are not described in detail herein.

The communication device 800 may also include at least one memory 830 for storing program instructions and/or data. Memory 830 is coupled to processor 820. The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which may be in electrical, mechanical, or other forms for information interaction between the devices, units, or modules. Processor 820 may operate in conjunction with 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 between the communication interface 810, the processor 820, and the memory 830 is not limited in the embodiments of the present application. In the embodiment of the present application, the memory 830, the processor 820 and the communication interface 810 are connected through the bus 870 in fig. 8, where the bus is indicated by a thick line in fig. 8, and the connection manner between other components is only schematically illustrated, and is not limited thereto. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 8, but not only one bus or one type of bus.

When the communication device 700 and the communication device 800 are specifically chips or chip systems, the baseband signals may be output or received by the communication module 702 and the communication interface 810. When apparatus 700 and apparatus 800 are devices in particular, the communication module 702 and communication interface 810 may output or receive 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. The 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 embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution.

In the embodiment of the present application, the memory 830 may be a nonvolatile memory, such as a hard disk (HDD) or a Solid State Drive (SSD), or may be a volatile memory (volatile memory), 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 implementing a memory 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, the embodiment of the 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 embodiment of the method. In one possible design, the chip is connected to a memory or the chip comprises a memory for holding the necessary program instructions and data of the communication device.

The present application provides a computer readable storage medium storing a computer program comprising instructions for performing the above-described method embodiments.

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.

It will be appreciated by those skilled in the art that 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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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 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. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made to 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 and the equivalents thereof, the present application is intended to encompass such modifications and variations.

Claims

1. A method for measuring different frequencies or different systems, 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 service cell and a third cell for transmitting a reference signal on the first frequency point are different frequency cells, and the third cell is a neighboring cell of the first service cell; or the second service cell and the third cell of the terminal are different system cells, the second service cell is a main cell of the terminal, and the first service cell is a secondary cell of the terminal;

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

the terminal determines a measurement result of the third cell according to the signal corresponding to the first frequency point;

the receiving the signal of the frequency band of the BWP includes:

the terminal receives signals of the frequency band of the BWP in a first measurement window, wherein the time length of the first measurement window is larger than or equal to the period of the third cell for transmitting reference signals on the first frequency point;

The method further comprises the steps of:

the terminal determines a time domain position of the third cell for transmitting 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 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; the time length of the second measurement window is smaller than that of the first measurement window, the measurement period is M times of that of the first measurement window, M is a positive integer, when M is larger than 1, the measurement period comprises M sub-periods with equal time length, the time length 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.

2. The method of claim 1, wherein the duration of the first measurement window configures a period of SMTC for a synchronized broadcast signal block measurement time.

3. A method according to claim 1 or 2, characterized in that the duration of the second measurement window is 5ms.

4. The method according to claim 1 or 2, wherein the duration of the second measurement window is a duration occupied by the neighbor cell transmitting reference signal, and the duration occupied by the neighbor cell transmitting reference signal is less than 5ms.

5. A communication device, comprising:

a communication module, configured to, when the communication device needs to measure a first frequency point, receive, if the first frequency point is located in a frequency band of a partial bandwidth BWP activated by a first serving cell of the device, a signal of the frequency band of the BWP through a radio frequency path operating in the frequency band of the BWP; wherein: a third cell of the first service cell for transmitting a reference signal on the first frequency point is a different frequency cell, and the third cell is a neighboring cell of the first service cell; or the second service cell and the third cell of the device are different system cells, the second service cell is a main cell of the device, and the first service cell is a secondary cell of the device;

a processing module, configured to determine, from signals of the BWP frequency band, a signal corresponding to the first frequency point; the method comprises the steps of determining a measurement result of a first cell according to a signal corresponding to a first frequency point;

The communication module is specifically configured to, when receiving a signal of the BWP frequency band:

receiving signals of the frequency band of the BWP in a first measurement window, wherein the time length of the first measurement window is greater than or equal to the period of the third cell for transmitting reference signals on the first frequency point;

the processing module is further configured to:

determining a time domain position of the third cell for transmitting 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 according to the offset value in each measurement period in at least one measurement period after the first measurement window; and the reference signal sent by the third cell on the first frequency point is measured in the second measurement window; the duration of the second measurement window is smaller than that of the first measurement window, the measurement period is M times of that of the first measurement window, M is a positive integer, when M is larger than 1, the measurement period comprises M sub-periods with equal duration, 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.

6. The apparatus of claim 5, wherein the second measurement window has a duration of 5ms.

7. The apparatus of claim 5, wherein the second measurement window has a duration of time that the neighbor cell transmits a reference signal, the neighbor cell transmits a reference signal for less than 5ms.

8. The apparatus of any of claims 5-7, wherein a duration of the first measurement window is a period of a synchronized broadcast signal block measurement time configuration SMTC.

9. A communication device, comprising: a processor coupled to a memory for storing a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 1-4.

10. A computer readable storage medium having computer readable instructions stored therein, which when run on a communication device, perform the method of any of claims 1-4.