Cell measurement method and apparatus, cell reselection method and apparatus, and device and storage medium

Abstract

A cell measurement method and apparatus, a cell reselection method and apparatus, and a device and a storage medium, which relate to the technical field of communications. The cell measurement method comprises: executing cell measurement on the basis of first information, wherein the first information is related to a signal propagation path between a terminal device and a serving cell (310). The cell reselection method comprises: executing cell reselection on the basis of first information and / or second information, wherein the first information is related to a signal propagation path between a terminal device and a serving cell, and the second information is related to a signal propagation path between the terminal device and a candidate target cell (510). According to the methods, during cell measurement and cell reselection, the timing for executing cell measurement and cell reselection can be accurately determined on the basis of whether obstacles are present in signal propagation between a terminal device and a serving cell and / or between the terminal device and a candidate target serving cell, and on the basis of the distribution of the obstacles.

Description

Cell measurement methods, cell reselection methods, devices, equipment and storage media Technical Field

[0001] This application relates to the field of communication technology, and in particular to a cell measurement method, a cell reselection method, an apparatus, a device, and a storage medium. Background Technology

[0002] During the propagation of a signal, there may or may not be obstacles. When there are obstacles, the signal will be negatively affected during propagation, such as signal strength attenuation, inter-symbol interference, and frequency-selective fading.

[0003] It is necessary to study whether there are obstacles during the signal propagation at both ends and the impact of the distribution of obstacles on cell measurement and cell reselection processes. Summary of the Invention

[0004] This application provides a cell measurement method, a cell reselection method, an apparatus, a device, and a storage medium. The technical solution is as follows:

[0005] According to one aspect of the embodiments of this application, a cell measurement method is provided, the method being executed by a terminal device, the method comprising:

[0006] Cell measurements are performed based on first information, which relates to the signal propagation path between the terminal device and the serving cell.

[0007] According to one aspect of the embodiments of this application, a cell reselection method is provided, the method being executed by a terminal device, the method comprising:

[0008] Cell reselection is performed based on first information and / or second information, wherein the first information relates to the signal propagation path between the terminal device and the serving cell, and the second information relates to the signal propagation path between the terminal device and the candidate target cell.

[0009] According to one aspect of the embodiments of this application, a cell measurement device is provided, the device comprising: a processing module;

[0010] The processing module is used to perform cell measurement based on first information, which is related to the signal propagation path between the terminal device and the serving cell.

[0011] According to one aspect of the embodiments of this application, a cell reselection apparatus is provided, the apparatus comprising: a processing module;

[0012] The processing module is configured to perform cell reselection based on first information and / or second information, wherein the first information is related to the signal propagation path between the terminal device and the serving cell, and the second information is related to the signal propagation path between the terminal device and the candidate target cell.

[0013] According to one aspect of the embodiments of this application, a terminal device is provided, the terminal device including a processor and a memory, the memory storing a computer program, the processor executing the computer program to implement the above-described cell measurement method or cell reselection method.

[0014] According to one aspect of the embodiments of this application, a computer-readable storage medium is provided, the storage medium storing a computer program, the computer program being executed by a processor to implement the above-described cell measurement method or cell reselection method.

[0015] According to one aspect of the embodiments of this application, a chip is provided, the chip including programmable logic circuits and / or program instructions, which, when the chip is running, are used to implement the above-described cell measurement method or cell reselection method.

[0016] According to one aspect of the embodiments of this application, a computer program product is provided, the computer program product including computer instructions stored in a computer-readable storage medium, and a processor reading from the computer-readable storage medium and executing the computer instructions to implement the above-described cell measurement method or cell reselection method.

[0017] The technical solutions provided in this application embodiment may have the following beneficial effects:

[0018] When performing cell measurements, the measurement can be performed based on the signal propagation path between the terminal device and the serving cell. For example, when there are many obstacles in the signal propagation process between the terminal device and the serving cell, cell measurements are tended to be performed to facilitate subsequent cell reselection and ensure the reliability of signal transmission; when there are no obstacles or few obstacles in the signal propagation process between the terminal device and the serving cell, cell measurements are tended not to be performed to save terminal power consumption and signaling (such as reference signal) overhead.

[0019] Furthermore, during cell reselection, the system can flexibly determine the cell reselection method based on the signal propagation path between the terminal device and the serving cell, and / or the signal propagation path between the terminal device and the candidate target cell. For example, when there are many obstacles in the signal propagation process between the terminal device and the serving cell, cell reselection is preferred; when there are no obstacles or few obstacles in the signal propagation process between the terminal device and the candidate target cell, cell reselection is preferred to ensure the accuracy of cell reselection and thus guarantee reliable signal transmission. Attached Figure Description

[0020] Figure 1 is a schematic diagram of a network architecture provided in one embodiment of this application;

[0021] Figure 2 is a schematic diagram of constructive interference between multipath signals provided in one embodiment of this application;

[0022] Figure 3 is a flowchart of a cell measurement method provided in an embodiment of this application;

[0023] Figure 4 is a flowchart of a cell measurement method provided in another embodiment of this application;

[0024] Figure 5 is a flowchart of a cell reselection method provided in an embodiment of this application;

[0025] Figure 6 is a flowchart of a cell reselection method provided in another embodiment of this application;

[0026] Figure 7 is a block diagram of a cell measurement device provided in an embodiment of this application;

[0027] Figure 8 is a block diagram of a cell reselection device provided in an embodiment of this application;

[0028] Figure 9 is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0030] The network architecture and business scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0031] The technical solutions of this application embodiment can be applied to various communication systems, such as: Global System for Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio System, evolution system of NR system, LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), and Wireless Fidelity (WF). Fidelity (WiFi), 5th-Generation (5G) systems, B5G (Beyond5G) systems, 6th-Generation (6G) systems, or other communication systems.

[0032] Traditional communication systems typically support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication but also, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication. The embodiments of this application can also be applied to these communication systems.

[0033] The communication system in this application embodiment can be applied to carrier aggregation scenarios, dual connectivity (DC) scenarios, and standalone (SA) network deployment scenarios.

[0034] The communication system in this application embodiment can be applied to unlicensed spectrum, wherein unlicensed spectrum can also be considered as shared spectrum; or, the communication system in this application embodiment can also be applied to licensed spectrum, wherein licensed spectrum can also be considered as non-shared spectrum.

[0035] The embodiments of this application can be applied to both non-terrestrial networks (NTN) and terrestrial networks (TN). NTN typically uses satellite communication to provide communication services to terrestrial users. Currently, NTN systems include NR-NTN and IoT-NTN systems, and other NTN systems may be included in the future.

[0036] Please refer to Figure 1, which shows a schematic diagram of a network architecture 100 provided in one embodiment of this application. The network architecture 100 may include: a terminal device 10, an access network device 20, and a core network element 30.

[0037] Terminal device 10 can refer to UE (User Equipment), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, wireless communication device, user agent, or user equipment. In some embodiments, terminal device 10 can also be a cellular phone, cordless phone, SIP (Session Initiation Protocol) phone, WLL (Wireless Local Loop) station, PDA (Personal Digital Assistant), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, vehicle-mounted device, wearable device, terminal device in 5GS (5th Generation System), or terminal device in the future evolved PLMN (Public Land Mobile Network), etc., and this application embodiment is not limited to these. For ease of description, the devices mentioned above are collectively referred to as terminal devices. The number of terminal devices 10 is usually multiple, and one or more terminal devices 10 can be distributed within the cell managed by each access network device 20. Terminal equipment can also be simply referred to as terminal or UE, the meaning of which can be understood by those skilled in the art.

[0038] Access network device 20 is a device deployed in an access network to provide wireless communication functionality to terminal device 10. Access network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems employing different wireless access technologies, the name of the device with access network device functionality may differ; for example, in a 5G NR system, it is called gNodeB or gNB. As communication technologies evolve, the name "access network device" may change. For ease of description, in this embodiment, the aforementioned devices providing wireless communication functionality to terminal device 10 are collectively referred to as access network devices. In some embodiments, a communication relationship can be established between terminal device 10 and core network element 30 through access network device 20. For example, in an LTE (Long Term Evolution) system, access network device 20 may be one or more eNodeBs in an EUTRAN (Evolved Universal Terrestrial Radio Access Network) or EUTRAN; in a 5G NR system, access network device 20 may be one or more gNBs in a RAN (Radio Access Network). In the embodiments of this application, unless otherwise specified, the term "network device" refers to access network device 20, such as a base station.

[0039] Core network element 30 is a network element deployed in the core network. Its main functions are to provide user connectivity, manage users, and bear services, serving as an interface to external networks. For example, core network elements in a 5G NR system may include AMF (Access and Mobility Management Function) entities, UPF (User Plane Function) entities, and SMF (Session Management Function) entities.

[0040] In some embodiments, the access network device 20 and the core network element 30 communicate with each other via some air interface technology, such as the NG interface in a 5G NR system. The access network device 20 and the terminal device 10 communicate with each other via some air interface technology, such as the Uu interface.

[0041] The "5G NR system" in this application embodiment can also be referred to as a 5G system or an NR system, but those skilled in the art will understand its meaning. The technical solutions described in this application embodiment can be applied to LTE systems, 5G NR systems, and subsequent evolution systems of 5G NR systems (such as B5G (Beyond 5G, a fifth-generation mobile communication technology) systems, 6G systems (6th Generation System, a sixth-generation mobile communication system)), and other communication systems such as NB-IoT (Narrow Band Internet of Things) systems. This application does not limit these applications.

[0042] In this embodiment, the network device can provide services to a cell. The terminal device communicates with the network device through the transmission resources (e.g., frequency domain resources, or spectrum resources) on the carrier used by the cell. The cell can be the cell corresponding to the network device (e.g., a base station). The cell can belong to a macro base station or to a base station corresponding to a small cell. The small cell can include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-speed data transmission services.

[0043] Before introducing the technical solution of this application, some related technical knowledge involved in this application will be introduced and explained. The following related technologies are optional solutions and can be arbitrarily combined with the technical solutions of the embodiments of this application, all of which fall within the protection scope of the embodiments of this application. The embodiments of this application include at least some of the following contents.

[0044] 1.5G cell reselection

[0045] 1.1 Overall Process

[0046] 1. The UE performs the cell reselection process in RRC_IDLE state.

[0047] 2. Different triggering conditions must be followed for same-frequency and different-frequency measurements.

[0048] 3. When the priorities of the same frequency and different frequencies are equal, cell reselection is based on cell ranking.

[0049] 4. When reselecting cells on different frequencies, frequency band priority and the status of the corresponding cells must be considered:

[0050] 1) When the signal quality of the target cell is good enough, the cell with higher priority should be selected.

[0051] 2) When the signal quality of the serving cell is poor and the signal quality of the target cell is good enough, a cell with lower priority can be selected.

[0052] 5. For NTN (Non-Terrestrial Network) satellite cells, even if the signal quality between the UE and the gNB serving base station is good, the UE still needs to perform cell reselection measurements if the distance is too far.

[0053] 1.2 Triggering conditions for same-frequency measurement

[0054] Same-frequency measurement rules: When the conditions Srxlev>SIntraSearchP and Squal>SintraSearchQ are not met, the UE performs same-frequency measurement. If the conditions are met, the UE further checks: whether the UE is within the specified range of the serving gNB base station; whether SIB19 broadcasts distanceThresh and referenceLocation; and whether the UE supports location-based measurement and has obtained its location information.

[0055] Among them, Srxlev (Serving cell Received Signal Level) is used to indicate the strength of the received signal of the serving cell, Squal (Serving cell Received Signal Quality) is used to indicate the quality of the received signal of the serving cell, and SIntraSearchP and SintraSearchQ are preset thresholds.

[0056] 1.3 Triggering conditions for heterogeneous frequency measurement

[0057] For frequency bands with higher frequency band reselection priority, the UE needs to perform measurements.

[0058] For frequency bands with the same or lower reselection priority, if the serving cell satisfies Srxlev>SnonIntraSearchP and Squal>SnonIntraSearchQ, then the UE does not need to perform a measurement.

[0059] If the conditions are met but the UE is outside the specific range of the serving gNB base station, the measurement still needs to be performed (provided that SIB19 broadcasts distanceThresh and referenceLocation).

[0060] Among them, SnonIntraSearchP and SnonIntraSearchQ are preset thresholds.

[0061] 1.4 Criteria for Cell Reselection Based on Same Frequency and Same Priority but Different Frequency

[0062] 1. The calculation methods of the cell ranking criteria Rs and Rn are as follows:

[0063] Rs = Qmeas,s + Qhyst - Qoffsettemp

[0064] Rn = Qmeas,n - Qoffset - Qoffsettemp

[0065] Among them, Rs is used to indicate the signal quality of the serving cell, Rn is used to indicate the signal quality of co-frequency and co-priority inter-frequency cells, Qmeas,s refers to the received signal quality of the serving cell, Qhyst refers to the cell reselection hysteresis, Qoffsettemp refers to the compensation offset value, Qmeas,n refers to the received signal quality of co-frequency and co-priority inter-frequency cells, and Qoffset refers to the difference in the received signal quality requirements between the serving cell and co-frequency and co-priority inter-frequency cells.

[0066] 2. Cell reselection rules:

[0067] If rangeToBestCell is not configured, the UE selects the cell with the highest ranking for reselection.

[0068] If rangeToBestCell is configured, the UE should select the cell with the most beams higher than the threshold among the rangeToBestCell cells with the highest R value.

[0069] 1.5 Inter-frequency and inter-RAT (Inter-Radio Access Technology) cell reselection criteria

[0070] For higher-priority NR frequency bands: If the target cell satisfies Squal > Thresh X,HighQ or Srxlev > Thresh X, HighP , the UE performs reselection. Among them, Thresh X,HighQ , Thresh X,HighP are preset thresholds.

[0071] For the same-priority NR frequency bands: Select based on the ranking of co-frequency cell reselection.

[0072] For lower-priority NR frequency bands: Within the reselection time interval Treselection RAT of different radio access technologies (RATs), if the serving cell satisfies Squal < ThreshServing,LowQ and the target cell satisfies Squal > Thresh X,LowQIf so, a reselection will be performed. Among them, ThreshServing,LowQ, and Thresh... X,LowQ This is a preset threshold.

[0073] LOS (lign-of-sight) indication in 2.5G NR

[0074] By definition, LOS measurement is introduced to provide information on the probability of a direct path from the signal transmitter to the receiver, and it is divided into the following two modes:

[0075] Soft Indicator: This field indicates the probability of a LOS direct path, ranging from 0 to 1 with a step size of 0.1. A value of "0" indicates a non-LOS direct path (NLOS), while values ​​from "1" to "10" represent an estimate of the probability of a LOS direct path, with a scaling factor of 0.1, ranging from 0 to 1.

[0076] Hard indication: This field indicates whether the propagation path between the signal source and the receiver is a LOS direct path, with a value of "true" (LOS) or "false" (NLOS).

[0077] The basic principle is to determine the likelihood of a direct path to the Loss of Position (LOS) when the UE transmits DL-PRS (Downlink Positioning Reference Signal) between the UE and TRPs (Transmission and Reception Points) via gNB.

[0078] ASN.1 code format: [0,1] indicates a soft indicator, or 0,1 indicates a hard indicator.

[0079] The LOS indication value can be derived based on the channel estimation results (RAN1 range).

[0080] 3. Why does LOS indication need to be considered during 6G cell reselection?

[0081] LOS direct path means better wireless channel quality, which helps improve connection stability.

[0082] NLOS propagation has negative effects, such as inter-symbol interference and frequency-selective fading.

[0083] Current 5G systems utilize equalizers and OFDM (Orthogonal Frequency Division Multiplexing) based multi-narrowband carrier waveforms to mitigate the impact of NLOS, but the architecture and waveform design for 6G have not yet been determined.

[0084] Signal blocking caused by NLOS may not be significantly reflected in the measured RSRP (Reference Signal Received Power) and RSRQ (Reference Signal Received Quality), especially in environments with a large number of NLOS signals, where constructive interference between multipath signals may occur. Sometimes, due to the constructive interference effect, the signal level measured in environments with a large number of NLOS signals may be higher than expected.

[0085] Constructive interference effect: As shown in Figure 2, when waves meet at the same location and time, their amplitudes simply add up. Consider two waves with the same frequency and propagating in the same direction: if we add these two waves point by point, we eventually get a new wave that looks similar to the original two waves, but with a larger amplitude. This situation is called constructive interference when the amplitude of the composite wave is greater than either of the original waves. Constructive interference occurs when the wave crests align. This situation is often described as waves being "in phase".

[0086] In 5G positioning, another measurement result is also defined regarding the signal level measurement results of the first path: nr-DL-PRS-FirstPathRSRP-Result:

[0087] This field represents the received signal power (DL PRS-RSRPP) of the first path of arrival detected by 5G NR DL-PRS in the time domain. The first path of arrival is the path through which the signal from the cell first reaches the terminal device in at least one signal propagation path between the terminal device and the cell. Clearly, this measurement also reflects the conditions of wireless propagation. If the detected first path of arrival is not a direct path from the LOS (LoS), or if the LOS signal attenuates significantly, the measurement result will be low.

[0088] Current 5G standards do not consider the existence of Loss of Service (LOS) between the serving cell, neighboring cells, and the UE during cell reselection. The UE may select a cell with seemingly good signal conditions, but actually with poor wireless signal propagation.

[0089] Please refer to Figure 3, which shows a flowchart of a cell measurement method provided in one embodiment of this application. This method is executed by a terminal device and can be applied to the network architecture shown in Figure 1. The method may include the following step 310.

[0090] Step 310: Perform cell measurement based on the first information, which is related to the signal propagation path between the terminal device and the serving cell.

[0091] Cell measurement refers to the process by which a terminal device measures and evaluates the signals of neighboring cells of its serving cell. Neighboring cells of the serving cell can be co-frequency cells or inter-frequency cells. Co-frequency cells are cells that have the same frequency or are in the same frequency band as the serving cell. Inter-frequency cells are cells that have a different frequency or are in a different frequency band than the serving cell; this application does not limit this.

[0092] A serving cell refers to the cell currently used to provide communication services to a terminal device, such as the cell to which the terminal device is currently connected. In this application, the signal propagation path between the terminal device and the serving cell refers to the signal propagation path between the terminal device and the network equipment (also called the serving cell base station) corresponding to the serving cell, used to indicate the physical path traversed by the signal between the terminal device and the serving cell base station during propagation. Through the signal propagation path, it is possible to determine whether there are obstacles between the terminal device and the serving cell base station and the distribution of those obstacles.

[0093] In some embodiments, signal propagation between the terminal device and the serving cell base station may be unobstructed, meaning there is a LOS (Lead-of-Sight) path for signal transmission between them. This indicates that signal propagation is not blocked by any obstacles, and the signal can directly propagate from the serving cell base station to the terminal device or vice versa. Since there are no obstacles obstructing signal propagation, the signal attenuation during propagation is relatively small, resulting in better wireless channel quality and improved connection stability. In some embodiments, signal propagation between the terminal device and the serving cell base station may also be obstructed, meaning the signal transmission between them is NLOS (No-Obstruction-of-Sight). In other words, there is no LOS path for signal transmission between them, meaning the signal propagation is blocked by obstacles. The signal cannot propagate directly but instead bypasses the obstacles through reflection, refraction, scattering, etc., to reach the terminal device or the serving cell base station. Because the signal undergoes multiple reflections, refractions, and scattering during propagation, there is significant signal loss. Therefore, this NLOS transmission has negative effects, such as inter-symbol interference and frequency-selective fading.

[0094] In some embodiments, when there are no obstacles or few obstacles to signal propagation between the terminal device and the serving cell base station, it indicates that the signal transmission conditions between the terminal device and the serving cell are relatively good. In this case, it is neither necessary nor appropriate to measure neighboring cells, i.e., cell measurement is not performed, to reduce the power consumption of the terminal device and reduce unnecessary signaling overhead during the cell measurement process, such as reducing reference signal overhead. When the first information indicates that there are many obstacles to signal propagation between the terminal device and the serving cell base station, it indicates that the signal transmission conditions between the terminal device and the serving cell are poor. In this case, it is necessary to measure neighboring cells in a timely manner, i.e., to perform cell measurement, to determine neighboring cells with better signal transmission conditions, so as to ensure that subsequent reselection to neighboring cells with better signal transmission conditions can be achieved, thereby ensuring reliable signal transmission.

[0095] In summary, the technical solution provided in this application can perform cell measurement based on the signal propagation path between the terminal device and the serving cell. For example, when there are many obstacles in the signal propagation process between the terminal device and the serving cell, cell measurement is tended to be performed to facilitate subsequent cell reselection and ensure the reliability of signal transmission; when there are no obstacles or few obstacles in the signal propagation process between the terminal device and the serving cell, cell measurement is tended not to be performed to save terminal power consumption and signaling (such as reference signal) overhead.

[0096] The following describes the detailed content included in the first piece of information.

[0097] In some embodiments, the first information includes a first parameter value, which is used to indicate LOS direct path related information between the terminal device and the serving cell.

[0098] The LOS direct path information in the first parameter value is used to indicate the relationship between the signal propagation path and the LOS direct path between the terminal device and the serving cell. For example, it can indicate whether there is an LOS direct path in the signal propagation path between the terminal device and the serving cell base station.

[0099] The above method uses LOS direct path information, such as determining whether a LOS direct path exists in the signal propagation path between the terminal device and the serving cell base station, to facilitate subsequent determination of whether to perform cell measurement.

[0100] In some embodiments, the first parameter value includes a first LOS indication value, which is used to indicate the possibility of a LOS direct path between the terminal device and the serving cell, or the first LOS indication value is used to indicate whether a LOS direct path exists between the terminal device and the serving cell.

[0101] In some embodiments, the first parameter value includes a first LOS indication value, which indicates the likelihood of a direct LOS path between the terminal device and the serving cell, corresponding to the soft indication method described above. It can be understood that a higher likelihood of a direct LOS path between the terminal device and the serving cell means a greater probability that signal transmission between them will be in a straight line, resulting in less obstruction during signal transmission and better transmission conditions, thus increasing the likelihood of not performing cell measurement. Conversely, a lower likelihood of a direct LOS path between the terminal device and the serving cell means a lower probability that signal transmission between them will be in a straight line, resulting in greater obstruction during signal transmission and worse transmission conditions, thus increasing the likelihood of performing cell measurement. For example, the first LOS indication value can be a probability value ranging from 0 to 1, where 0 indicates that the probability of a direct LOS path between the terminal device and the serving cell is 0, meaning there is almost no direct path, and signal transmission is likely to be significantly hindered. In this case, the terminal is very likely to perform cell measurement. 1 indicates that the probability of a direct LOS path between the terminal device and the serving cell is 100%, meaning there is definitely a direct path, signal transmission conditions are good, and the terminal is very likely not to perform cell measurement. In other words, the closer the value is to 1, the greater the probability of a direct path existing, and the more likely the terminal is not to perform cell measurement; the closer the value is to 0, the smaller the probability of a direct path existing, and the more likely the terminal is to perform cell measurement.

[0102] In some embodiments, the first LOS indication value is used to indicate whether there is a direct LOS path between the terminal device and the serving cell, which corresponds to the hard indication method described above. For example, the first LOS indication value can be 0 or 1, where 0 can represent that there is a direct LOS path between the two and 1 can represent that there is no direct LOS path between the two; or 0 can represent that there is no direct LOS path between the two and 1 can represent that there is a direct LOS path between the two. This application does not limit this.

[0103] The above method allows the first LOS indication value to indicate the probability of a direct LOS path between the terminal device and the serving cell, or to indicate whether a direct LOS path exists between the terminal device and the serving cell. Through these two LOS indication methods, the terminal device can flexibly determine whether a direct LOS path exists between itself and the serving cell base station, or the probability of such a path, thus facilitating subsequent determination of whether to perform cell measurement.

[0104] In some embodiments, the first parameter value includes a first signal strength value, which is used to indicate the signal strength of a first path of arrival. The first path of arrival is the path through which the signal from the serving cell first reaches the terminal device in at least one signal propagation path between the terminal device and the serving cell.

[0105] At least one signal propagation path refers to the propagation path of a reference signal. In some embodiments, the network device corresponding to the serving cell sends a reference signal, which corresponds to at least one signal propagation path. The first path of arrival is the first propagation path among the at least one signal propagation paths to reach the terminal device. In other words, the first path of arrival is the first propagation path detected / received by the terminal device among the at least one signal propagation paths. In some embodiments, the first path of arrival is the propagation path with the shortest signal transmission distance among the at least one signal propagation paths. If there is a LOS direct path in the signal transmission between the terminal device and the serving cell, then the first path of arrival is that LOS direct path. If there is no LOS direct path in the signal transmission between the terminal device and the serving cell, then the first path of arrival is the propagation path with the shortest signal transmission distance among at least one NLOS signal propagation path.

[0106] The signal strength of the first arrival path is used to indicate the signal quality of the first arrival path. For example, the signal strength of the first arrival path can be indicated by the RSRP and RSRQ of the first arrival path, but this application does not limit this. The signal strength of the first arrival path reflects the amount of energy transmitted on the first arrival path. If the signal strength is high, it indicates that the signal energy loss on the path is small, meaning that there may not be many obstacles blocking the path; conversely, if the strength is low, there may be obstacles causing severe signal attenuation. Therefore, the greater the signal strength of the first arrival path, the better the transmission conditions between the two paths, and the more inclined to not perform cell measurement. The smaller the signal strength of the first arrival path, the worse the transmission conditions between the two paths, and the more inclined to perform cell measurement.

[0107] In the above method, the first signal strength value can be used to indicate the signal quality of the first path of arrival between the terminal device and the serving cell. Using this first signal strength value, the terminal device can determine the strength of the signal transmission with the serving cell base station, thereby facilitating subsequent determination of whether to perform cell measurement.

[0108] In some embodiments, the first parameter value includes a first LOS indication value. Performing cell measurement based on the first information includes: performing cell measurement if a first condition is met, the first condition including: the first LOS indication value is less than a first threshold. In other words, if the first condition is not met, cell measurement is not performed. In this application, the comparison of numerical values, such as the comparison of the first parameter value or the second parameter value with the threshold, is described using only the terms "less than" or "greater than". For example, here the first LOS indication value is less than the first threshold. It should be noted that "less than" can mean only less than, or less than or equal to; similarly, "greater than" can mean only greater than, or greater than or equal to. For two parallel branches in this application, if one branch is less than, then the other branch is greater than, or the other branch is greater than or equal to; or, if one branch is less than or equal to, then the other branch is greater than.

[0109] A first LOS indication value less than a first threshold indicates that there is no LOS direct path between the terminal device and the serving cell, or the LOS direct path signal is very weak. In this case, the signal transmission conditions between the terminal device and the serving cell are poor, so cell measurement is performed to facilitate subsequent cell reselection and ensure reliable signal transmission.

[0110] In some embodiments, the first LOS indication value is used to indicate the possibility of a direct LOS path between the terminal device and the serving cell. Cell measurement is performed when a first condition is met. The first condition includes: the first LOS indication value is less than a first threshold, that is, the possibility of a direct LOS path between the terminal device and the serving cell (such as the probability that a direct LOS path exists between the two) is less than the first threshold.

[0111] In some embodiments, a first LOS indication value is used to indicate whether a LOS direct path exists between the terminal device and the serving cell. Cell measurement is performed when a first condition is met, the first condition including: the first LOS indication value is less than a first threshold, the first threshold being used to indicate the existence of a LOS direct path between the terminal device and the serving cell, for example, the first threshold being 1. When the first LOS indication value is less than 1, for example, 0, it indicates that there is no LOS direct path between the terminal device and the serving cell, and cell measurement is not performed.

[0112] The above method, by performing cell reselection when the first LOS indication value is less than the first threshold, enables timely cell measurement when the signal transmission conditions between the terminal device and the serving cell are poor, so as to facilitate subsequent cell reselection and ensure reliable transmission of subsequent signals.

[0113] In some embodiments, the first parameter value includes a first signal strength value, and performing cell measurement based on first information includes: performing cell measurement when a first condition is met, the first condition including: the first signal strength value is less than a second threshold.

[0114] A first signal strength value less than the second threshold indicates a low signal strength between the terminal device and the serving cell. This may be due to the absence of a LOS direct path or a very weak LOS direct path signal, resulting in poor signal transmission conditions between the terminal device and the serving cell. In this case, cell measurement is performed. This method facilitates subsequent cell reselection, thereby ensuring reliable signal transmission.

[0115] In some embodiments, the first parameter value includes a first LOS indication value and a first signal strength value. Performing cell measurement based on the first information includes: performing cell measurement when a first condition is met, the first condition including: the first LOS indication value is less than a first threshold, and / or, the first signal strength value is less than a second threshold.

[0116] In some embodiments, cell measurement is performed when a first LOS indication value is less than a first threshold or a first signal strength value is less than a second threshold. In other words, cell measurement is performed when at least one of the following conditions is met: a first LOS indication value is less than a first threshold or a first signal strength value is less than a second threshold.

[0117] In some embodiments, cell measurement is performed when a first LOS indication value is less than a first threshold and a first signal strength value is less than a second threshold. In other words, cell measurement is performed when both the first LOS indication value and the first signal strength value are less than the second threshold.

[0118] The above method, by combining the first LOS indication value and the first signal strength value to determine the conditions for triggering cell measurement, can flexibly, comprehensively and accurately determine the timing for triggering cell measurement.

[0119] In some embodiments, the first condition further includes: the received signal strength of the serving cell is less than a first strength threshold, and / or, the received signal quality of the serving cell is less than a first quality threshold. This corresponds to the same-frequency and different-frequency measurement triggering conditions described above.

[0120] The received signal strength (RSS) of a serving cell refers to the power of the wireless signal received by a terminal device from the serving cell. It is an important indicator for measuring the strength of the serving cell signal at the terminal's receiving end. In wireless communication systems, signal strength is usually expressed in a specific unit (e.g., dBm). A higher RSS means that the terminal can receive the signal from the serving cell more clearly, and there is less likelihood of signal loss or bit errors during communication, which helps ensure the stability of data transmission and the clarity of voice calls. For example, when a terminal is close to the serving cell base station and there are no significant obstructions, the received serving cell signal strength is often higher; conversely, if the terminal is far from the base station or there are obstacles blocking the signal, the signal strength will be significantly reduced.

[0121] The received signal quality of a serving cell refers to the reliability and accuracy of the signal received by the terminal during transmission. It comprehensively reflects the degree of influence of interference, noise, fading, and other factors on the signal during propagation. Common parameters for measuring signal quality include the signal-to-interference-plus-noise ratio (SNR) and the block error rate (BER). Good received signal quality means that the signal can be accurately decoded and processed by the terminal, resulting in high data transmission accuracy and clear voice call quality. For example, in an environment with high signal quality, a larger SNR indicates a stronger signal relative to the interference and noise, and a lower BER, meaning a lower probability of data errors during transmission. Conversely, when there are many interference sources around the serving cell or it is located in an area with severe multipath fading, the received signal quality deteriorates, potentially leading to decreased communication quality and problems such as data packet loss and call noise.

[0122] The above method, in determining the conditions for triggering cell measurement, also considers the received signal strength and / or received signal quality of the serving cell, making the determination of the timing for triggering cell measurement more comprehensive and accurate.

[0123] In some embodiments, if a first condition is met, cell measurement is performed, including: if the first condition is met, performing cell measurement for a co-frequency cell or a different-frequency cell relative to the serving cell, wherein the different-frequency cell has the same or lower priority relative to the serving cell.

[0124] Cell priority refers to the important parameters assigned by the network to different cells to determine the order in which terminal devices perform cell measurements, reselection, and handover. It reflects the network's preference for each cell and its resource allocation strategy. Cell priority is typically determined by network equipment (such as base stations) based on a combination of factors, including cell coverage, load, signal quality, and service requirements. A higher priority cell means the network wants terminal devices to access that cell preferentially, because the higher priority cell has better coverage, stronger signal strength, more available resources, or can provide higher quality service, etc. Cells operating on the same frequency have the same priority as the serving cell. Cells operating on different frequencies have different priorities than the serving cell. In some embodiments, when a cell operating on a different frequency has a higher priority than the serving cell, cell measurement is performed regardless of whether a first condition is met.

[0125] The above method only measures co-frequency cells or inter-frequency cells with the same or lower priority of the serving cell when necessary (i.e., when the first condition is met), thus avoiding unnecessary cell measurements.

[0126] In some embodiments, the first threshold and / or the second threshold are indicated or preset by the network device through unicast or broadcast messages. In some embodiments, the first strength threshold and / or the first quality threshold are indicated or preset by the network device through unicast or broadcast messages. The network device can be the network device corresponding to the serving cell of the terminal device. Unicast information, also known as dedicated messages, is a message sent by the network device specifically to a particular terminal device, possessing strong targeting and privacy. For example, a unicast message can be an RCRelease (Radio Resource Control Release) message or an RCRelease with suspend message; this application does not limit this. A broadcast message is a message sent simultaneously by the network device to all terminal devices within its coverage area, characterized by wide coverage and high propagation efficiency. The terminal device can listen to the broadcast message according to its own needs or periodically listen to the broadcast message.

[0127] In some embodiments, the preset settings may be preset at the factory of the terminal device, or they may be predefined by the protocol, etc. This application does not limit this.

[0128] The above method, by transmitting thresholds via unicast messages, can provide personalized configurations for each terminal device. Different terminal devices have varying locations, movement speeds, and service requirements, resulting in different requirements for signal quality and strength. Through unicast messages, network devices can tailor parameters such as the first threshold, second threshold, first strength threshold, and first quality threshold to the specific circumstances of each terminal, such as whether the terminal is in a complex indoor environment or an open outdoor environment. This allows terminal devices to trigger cell measurements more accurately, improving communication stability and efficiency, and better meeting the personalized communication needs of terminals. Simultaneously, the unicast message transmission method ensures information security and privacy, preventing sensitive configuration information from being obtained by other terminals. Transmitting thresholds via broadcast messages enables efficient synchronization of configuration information to a large number of terminal devices. Within a serving cell, there may be numerous terminal devices. If network devices were to transmit threshold information to each terminal using unicast, it would consume significant network resources and time. Broadcast messages, however, can be sent to all terminal devices within the cell simultaneously, enabling rapid and unified transmission of threshold information to a large number of terminals, achieving batch configuration for a large number of terminals. This approach significantly improves information transmission efficiency and reduces network signaling overhead, enabling network devices to manage terminal devices within a cell more efficiently. It ensures that terminal devices perform cell measurements and handover operations under unified rules, maintaining overall network stability and coordination. Setting thresholds via pre-configuration simplifies how terminals determine these thresholds. On one hand, it saves the signaling overhead associated with indicating thresholds via unicast or broadcast messages. On the other hand, terminals no longer need to listen for unicast or broadcast messages from network devices to obtain thresholds, thus saving energy.

[0129] Please refer to Figure 4, which shows a flowchart of a cell measurement method provided in another embodiment of this application. The method may include the following steps S1 to S3.

[0130] In step S1, the network device indicates a threshold to the terminal device, which may include a first threshold, a second threshold, a first strength threshold, and a first quality threshold. Accordingly, the terminal device receives the threshold. Step S1a is used to indicate the threshold via a unicast message, and step S1b is used to indicate the threshold via a broadcast message. The threshold may also be preset (e.g., factory preset for the terminal), which is not limited in this application.

[0131] Step S2, the terminal device determines a first LOS indication value and / or a first signal strength value. The terminal device determines the first LOS indication value and / or the first signal strength value by measuring the reference signal sent by the network device.

[0132] Step S3: The terminal device determines whether to trigger cell measurement. The terminal device determines whether to trigger cell measurement by determining the relationship between the first LOS indication value and / or the first signal strength value and the corresponding threshold mentioned above. For details, please refer to the relevant content above; this application will not repeat them here.

[0133] Please refer to Figure 5, which shows a flowchart of a cell reselection method provided in one embodiment of this application. This method is executed by a terminal device and can be applied to the network architecture shown in Figure 1. The method may include the following step 510.

[0134] Step 510: Perform cell reselection based on the first information and / or the second information. The first information is related to the signal propagation path between the terminal device and the serving cell, and the second information is related to the signal propagation path between the terminal device and the candidate target cell.

[0135] Cell reselection refers to the process by which a terminal device switches from its current serving cell to a candidate target cell. The candidate target cell can be a neighboring cell of the serving cell, such as a cell operating on the same frequency as the serving cell, or a cell operating on a different frequency than the serving cell; this application does not limit this. In this application, the signal propagation path between the terminal device and the candidate target cell refers to the signal propagation path between the terminal device and the network equipment corresponding to the candidate target cell (also called the candidate target cell base station), used to indicate the physical path traversed by the signal between the terminal device and the candidate target cell base station during propagation. Through the signal propagation path, it can be determined whether there are obstacles between the terminal device and the candidate target cell base station and the distribution of those obstacles.

[0136] In some embodiments, signal propagation between the terminal device and the candidate target cell base station may be unobstructed, meaning there is a LOS (Lead-of-Sight) path for signal transmission between the terminal device and the candidate target cell base station. This indicates that signal propagation is not blocked by any obstacles, and the signal can directly propagate from the serving cell base station to the terminal device or vice versa. Since there are no obstacles obstructing signal propagation, the signal attenuation during propagation is relatively small, implying better wireless channel quality and contributing to improved connection stability. In some embodiments, signal propagation between the terminal device and the candidate target cell base station may also be obstructed, meaning the signal transmission between the terminal device and the candidate target cell base station is NLOS (No-Low-Sight). In other words, there is no LOS path for signal transmission between the terminal device and the candidate target cell base station, meaning that signal propagation is blocked by obstacles. The signal cannot propagate directly but instead bypasses the obstacles to reach the terminal device or the target candidate cell base station through reflection, refraction, scattering, etc. Because the signal undergoes multiple reflections, refractions, and scattering during propagation, there will be significant signal loss. Therefore, this NLOS transmission will have negative impacts, such as inter-symbol interference and frequency-selective fading. For a related description of the first information, please refer to the corresponding content above; it will not be repeated here.

[0137] In some embodiments, when there are no obstacles or few obstacles to signal propagation between the terminal device and the serving cell base station, the signal transmission conditions between the terminal device and the serving cell are relatively good. In this case, there is no need and no necessity to reselect to a candidate target cell, and cell reselection can be omitted. When there are many obstacles to signal propagation between the terminal device and the serving cell base station, the signal transmission conditions between the terminal device and the serving cell are relatively poor. In this case, reselection to a candidate target cell can be performed to select a neighboring cell with better conditions during the handover of the terminal device, thereby ensuring reliable signal transmission.

[0138] In some embodiments, when there are no obstacles or few obstacles to signal propagation between the terminal device and the candidate target cell base station, it indicates that the signal transmission conditions between the terminal device and the candidate target cell are relatively good. In this case, cell reselection is required to ensure reliable signal transmission. When there are many obstacles to signal propagation between the terminal device and the candidate target cell base station, it indicates that the signal transmission conditions between the terminal device and the candidate target cell are poor. In this case, cell reselection may not be performed to avoid unnecessary cell reselection.

[0139] In summary, the technical solution provided in this application can flexibly determine cell reselection based on the signal propagation path between the terminal device and the serving cell and / or the signal propagation path between the terminal device and the candidate target cell during cell reselection. For example, when there are many obstacles in the signal propagation process between the terminal device and the serving cell, cell reselection is tended to be performed; when there are no obstacles or few obstacles in the signal propagation process between the terminal device and the candidate target cell, cell reselection is tended to be performed to ensure the accuracy of cell reselection and thus guarantee reliable signal transmission.

[0140] The following describes the details of the first and second pieces of information.

[0141] In some embodiments, the first information includes a first parameter value, which is used for LOS direct path related information between the terminal device and the serving cell; and / or, the second information includes a second parameter value, which is used for LOS direct path related information between the terminal device and the candidate target cell.

[0142] The LOS direct path information in the second parameter value is used to indicate the relationship between the signal propagation path and the LOS direct path between the terminal device and the candidate target cell. For example, it can indicate whether there is a LOS direct path in the signal propagation path between the terminal device and the candidate target cell base station. For a description of the first parameter value, please refer to the relevant content above; it will not be repeated here.

[0143] The above method, by indicating the LOS direct path information of the terminal device and the serving cell, and the terminal device and the candidate target cell respectively, such as by determining whether there is a LOS direct path in the signal propagation path between the terminal device and the serving cell base station and / or whether there is a LOS direct path in the signal propagation path between the terminal device and the candidate target cell base station, facilitates the subsequent determination of whether to perform cell reselection.

[0144] In some embodiments, the first parameter value includes a first LOS indication value, which indicates the possibility of a direct LOS path between the terminal device and the serving cell, or the first LOS indication value indicates whether a direct LOS path exists between the terminal device and the serving cell; and / or, the second parameter value includes a second LOS indication value, which indicates the possibility of a direct LOS path between the terminal device and the candidate target cell, or the second LOS indication value indicates whether a direct LOS path exists between the terminal device and the candidate target cell.

[0145] In some embodiments, the greater the likelihood of a direct LOS path between the terminal device and the serving cell, the more likely the device is not to perform cell reselection. Conversely, the smaller the likelihood of a direct LOS path between the terminal device and the serving cell, the more likely the device is to perform cell reselection. For a description of the first LOS indication value, please refer to the relevant content above; it will not be repeated here.

[0146] In some embodiments, the second parameter value includes a second LOS indication value, which indicates the likelihood of a direct LOS path between the terminal device and the candidate target cell, corresponding to the soft indication method described above. It can be understood that a higher likelihood of a direct LOS path between the terminal device and the candidate target cell means a greater probability that signal transmission between them will be in a straight line, resulting in less obstruction during signal transmission and better transmission conditions. Conversely, a lower likelihood of a direct LOS path between the terminal device and the candidate target cell means a lower probability that signal transmission will be in a straight line, resulting in greater obstruction during signal transmission and worse transmission conditions. Therefore, a lower likelihood of not performing cell reselection is more likely. For example, the second LOS indication value can be a probability value ranging from 0 to 1, where 0 indicates that the probability of a direct LOS path between the terminal device and the candidate target cell is 0, meaning there is almost no direct path, and signal transmission is likely to be significantly hindered. In this case, the terminal is more likely not to perform cell reselection. 1 indicates that the probability of a direct LOS path between the terminal device and the candidate target cell is 100%, meaning there is definitely a direct path, signal transmission conditions are good, and the terminal is more likely to perform cell reselection. In other words, the closer the value is to 1, the greater the probability of a direct path existing, and the more likely the terminal is to perform cell reselection; the closer the value is to 0, the smaller the probability of a direct path existing, and the more likely the terminal is not to perform cell reselection.

[0147] In some embodiments, the second LOS indication value is used to indicate whether there is a direct LOS path between the terminal device and the candidate target cell, which corresponds to the hard indication method described above. For example, the second LOS indication value can be 0 or 1, where 0 can represent that there is a direct LOS path between the two and 1 can represent that there is no direct LOS path between the two; or 0 can represent that there is no direct LOS path between the two and 1 can represent that there is a direct LOS path between the two. This application does not limit this.

[0148] The above method allows the first LOS indication value to indicate the probability of a direct LOS path between the terminal device and the serving cell, or the first LOS indication value to indicate whether a direct LOS path exists between the terminal device and the serving cell. The second LOS indication value indicates the probability of a direct LOS path between the terminal device and the candidate target cell, or the second LOS indication value to indicate whether a direct LOS path exists between the terminal device and the candidate target cell. Through these two first and second LOS indication methods, the terminal device can flexibly determine whether a direct LOS path exists between itself and the serving cell base station and the candidate target cell, or the probability of such a path, thereby facilitating the determination of whether to perform cell reselection.

[0149] In some embodiments, the first parameter value includes a first signal strength value, which indicates the signal strength of a first arrival path, wherein the first arrival path is the path in which the signal from the serving cell first arrives at the terminal device in at least one signal propagation path between the terminal device and the serving cell; and / or, the second parameter value includes a second signal strength value, which indicates the signal strength of a second arrival path, wherein the second arrival path is the path in which the signal from the candidate target cell first arrives at the terminal device in at least one signal propagation path between the terminal device and the candidate target cell.

[0150] In some embodiments, a lower signal strength in the first path of arrival indicates worse transmission conditions between the two paths, thus increasing the likelihood of cell reselection. Conversely, a higher signal strength in the first path of arrival indicates better transmission conditions between the two paths, thus increasing the likelihood of not performing cell reselection. For a detailed description of the first signal strength value, please refer to the relevant content above; it will not be repeated here.

[0151] In some embodiments, the network device corresponding to the candidate target cell sends a reference signal, which corresponds to at least one signal propagation path. The second path of arrival is the first propagation path among the at least one signal propagation paths to reach the terminal device. In other words, the second path of arrival is the first propagation path detected / received by the terminal device among the at least one signal propagation paths. In some embodiments, the second path of arrival is the propagation path with the shortest signal transmission distance among the at least one signal propagation paths. If there is a LOS direct path in the signal transmission between the terminal device and the candidate target cell, then the second path of arrival is that LOS direct path. If there is no LOS direct path in the signal transmission between the terminal device and the candidate target cell, then the second path of arrival is the propagation path with the shortest signal transmission distance among at least one NLOS signal propagation path.

[0152] The signal strength of the second path of arrival is used to indicate the signal quality of the second path of arrival. For example, the signal strength of the second path of arrival can be indicated by the RSRP and RSRQ of the second path of arrival, but this application does not limit this. The signal strength of the second path of arrival reflects the amount of energy transmitted on the second path of arrival. If the signal strength is high, it indicates that the signal energy loss on that path is small, meaning that there may not be many obstacles blocking the path; conversely, if the strength is low, there may be obstacles causing severe signal attenuation. Therefore, the greater the signal strength of the second path of arrival, the better the transmission conditions between the two paths, and the more likely cell reselection will be performed.

[0153] In the above method, the first signal strength value can be used to indicate the signal quality of the first arrival path between the terminal device and the serving cell, and the second signal strength value can be used to indicate the signal quality of the second arrival path between the terminal device and the candidate target cell. Using the first signal strength value and / or the second signal strength value, the terminal device can determine the respective signal transmission strength between itself and the base stations of the serving cell and the candidate target cell, thereby comprehensively determining whether to perform cell reselection.

[0154] The following describes specific implementation methods for performing cell reselection based on the first information and / or the second information, which may include the following three methods.

[0155] Method 1

[0156] In some embodiments, performing cell reselection based on first information and / or second information includes: performing reselection to the candidate target cell if the candidate target cell meets a second condition, wherein the second condition includes: a second parameter value is greater than a third threshold. In other words, if the first condition is not met, cell reselection is not performed.

[0157] In some embodiments, the second parameter value includes a second LOS indication value. If the candidate target cell meets the second condition, a reselection to the candidate target cell is performed. The second condition includes: the second LOS indication value is greater than a third threshold.

[0158] In some embodiments, the second parameter value includes a second signal strength value. If the candidate target cell meets the second condition, a reselection to the candidate target cell is performed. The second condition includes: the second signal strength value is greater than a third threshold.

[0159] In some embodiments, the second parameter value includes a second LOS indication value and a second signal strength value. If the candidate target cell meets the second condition, reselection to the candidate target cell is performed. The second condition includes: the second LOS indication value is greater than a third threshold, and / or, the second signal strength value is greater than the third threshold. Alternatively, the second LOS indication value may be greater than the third threshold, and / or, the second signal strength value may be greater than a certain threshold value. This threshold value and the third threshold value are indicated or preset by the network device through unicast or broadcast messages. For details regarding unicast messages, broadcast messages, or presets, please refer to the corresponding description above. The above method, by transmitting thresholds through unicast information, can provide personalized configurations for each terminal device. Simultaneously, the unicast message transmission method ensures information security and privacy. Transmitting thresholds through broadcast information allows for efficient synchronization of configuration information to a large number of terminal devices. Setting thresholds through preset methods simplifies the way terminals determine the aforementioned thresholds.

[0160] In some embodiments, the second condition further includes: the received signal strength of the candidate target cell is greater than a second strength threshold, and / or the received signal quality of the candidate target cell is greater than a second quality threshold.

[0161] The received signal strength of a candidate target cell refers to the power of the wireless signal received by a terminal device from the candidate target cell. It is an important indicator for measuring the strength of the candidate target cell signal at the terminal's receiving end. When the terminal is close to the candidate target cell base station and there are no obvious obstructions, the received signal strength of the candidate target cell is usually high; conversely, if the terminal is far from the candidate target cell base station or there are obstacles blocking it, the signal strength will be significantly reduced.

[0162] The received signal quality of a candidate target cell refers to the reliability and accuracy of the signal received by the terminal from the candidate target cell during transmission. It comprehensively reflects the degree of influence of factors such as interference, noise, and fading on the signal during propagation. Common parameters for measuring signal quality include the signal-to-interference-plus-noise ratio (SNR) and the block error rate (BIR).

[0163] The above method, in determining the conditions for performing cell reselection, also considers the received signal strength and / or received signal quality of the candidate target cell, making the determination of the conditions for performing cell reselection more comprehensive and accurate.

[0164] In some embodiments, in the above method of determining cell reselection, the candidate target cell is a different frequency cell of the serving cell, and the priority of the candidate target cell is higher than the priority of the serving cell.

[0165] In Method 1 described above, the priority of the candidate target cell is higher than that of the serving cell. This means that the higher-priority inter-frequency cell has better coverage, stronger signal strength, more available resources, or can provide higher quality services. Therefore, in this case, reselection to the candidate target cell is only performed if the second parameter value of the candidate target cell is greater than the third threshold, to ensure that the terminal device can access the cell with better transmission services.

[0166] Method 2

[0167] In some embodiments, performing cell reselection based on first information and / or second information includes: determining the signal quality of the serving cell based on a first parameter value; and / or determining the signal quality of a candidate target cell based on a second parameter value; ranking the serving cell and the candidate target cells based on the signal quality of the serving cell and the signal quality of the candidate target cells, and performing cell reselection based on the ranking result.

[0168] The signal quality of the serving cell indicates the overall situation of the serving cell currently providing communication services to the terminal device, including signal strength, signal interference, and signal distortion. It reflects the stability and reliability of the terminal device during voice calls, data transmission, and other communication activities within that cell. The signal quality of the candidate target cell indicates the overall situation of the candidate target cell, including signal strength, signal interference, and signal distortion. It reflects the stability and reliability of voice calls, data transmission, and other communication activities if the terminal device is reselected from that candidate target cell.

[0169] In some embodiments, cell reselection is performed if the signal quality of the serving cell is lower than that of the candidate target cell. Cell reselection is not performed if the signal quality of the serving cell is greater than or equal to that of the candidate target cell.

[0170] The above method ranks the serving cell and candidate target cells based on signal quality. When the serving cell's signal quality is poor, for example, when the serving cell's ranking is lower than that of the candidate target cells, communication may experience interruptions or stuttering. By reselecting the terminal device to a candidate target cell with better signal quality, the terminal can always be in an area with good signal, ensuring clear voice calls and stable data transmission. When the serving cell's signal quality is good, for example, when the serving cell's ranking is higher than that of the candidate target cells, cell reselection is unnecessary, avoiding unnecessary cell reselection operations.

[0171] In some embodiments, the signal quality of the serving cell is determined based on at least one of the following: a first parameter value, the received signal quality of the serving cell, cell reselection hysteresis, and a compensation offset value; and / or, the signal quality of the candidate target cell is determined based on at least one of the following: a second parameter value, the received signal quality of the candidate target cell, the difference between the received signal quality requirements of the serving cell and the candidate target cell, and a compensation offset value.

[0172] In some embodiments, the sum of a first parameter value, the received signal quality of the serving cell, and cell reselection hysteresis is determined; the difference between this sum and the compensation offset value is taken as the signal quality of the serving cell, wherein the first parameter value is a first LOS indication value and / or a first signal strength value. When the first parameter value is the first LOS indication value and the first signal strength value, the first parameter value can be the sum of the first LOS indication value and the first signal strength value, or the average of the first LOS indication value and the first signal strength value, or a value determined based on the first LOS indication value and the first signal strength value; this application does not limit this. Optionally, the signal quality of the serving cell Rs = LOS indication1 + Qmeas,s + Qhyst – Qoffsettemp. Optionally, Rs = Signal strength1 + Qmeas,s + Qhyst – Qoffsettemp. Optionally, Rs = LOS indication1 + Signal strength1 + Qmeas,s + Qhyst – Qoffsettemp. Wherein, LOS indication1 is the first LOS indication value, and Signal strength1 is the first signal strength value, for example, Signal strength1 can be RSRP.

[0173] In some embodiments, a score for a first parameter value is determined; the score of the first parameter value, the received signal quality of the serving cell, and the cell reselection hysteresis are summed; the difference between this sum and the compensation offset value is taken as the signal quality Rs of the serving cell. In some embodiments, the score of the first parameter value is the score of a first LOS indication value and / or the score of a first signal strength value. When the score of the first parameter value is the score of the first LOS indication value and the score of the first signal strength value, the score of the first parameter value can be the sum of the scores of the first LOS indication value and the first signal strength value, or it can be the average of the scores of the first LOS indication value and the first signal strength value, or a value determined based on the scores of the first LOS indication value and the first signal strength value; this application does not limit this. Optionally, the score of the first LOS indication value = A * the first LOS indication value, where A is a preset value. Optionally, the score of the first LOS indication value is determined based on a mapping table, which is used to indicate the scores of different first LOS indication values ​​corresponding to different ranges of first LOS indication values. Optionally, the score of the first signal strength value = B * the first signal strength value, where B is a preset value. Optionally, the score of the first signal strength value is determined based on a mapping table, which indicates the scores of different first signal strength values ​​corresponding to different ranges of first signal strength values. The above determination of the scores of the first LOS indication value and the first signal strength value is merely exemplary and is not limited thereto. Optionally, the signal quality of the serving cell Rs = LOS indication1 score + Qmeas,s + Qhyst – Qoffsettemp. Optionally, Rs = Signal strength1 score + Qmeas,s + Qhyst – Qoffsettemp. Optionally, Rs = LOS indication1 score + Signal strength1 score + Qmeas,s + Qhyst – Qoffsettemp. Wherein, the LOS indication1 score is the score of the first LOS indication value, and the Signal strength1 score is the score of the first signal strength value.

[0174] In some embodiments, the sum of a second parameter value and the received signal quality of the candidate target cell is determined; the sum of these two values ​​is then subtracted from the difference in received signal quality requirements between the serving cell and the candidate target cell, and further subtracted from the compensation offset value, to obtain the signal quality of the candidate target cell. The second parameter value is a second LOS indication value and / or a second signal strength value. When the second parameter value is both the second LOS indication value and the second signal strength value, the second parameter value can be the sum of the second LOS indication value and the second signal strength value, the average of the second LOS indication value and the second signal strength value, or a value determined based on the second LOS indication value and the second signal strength value; this application does not limit this. Optionally, the signal quality of the candidate target cell Rn = LOS indication2 + Qmeas,n - Qoffset – Qoffsettemp. Optionally, Rn = Signal strength2 + Qmeas,n - Qoffset - Qoffsettemp. Optionally, Rn = LOS indication2 + Signal strength2 + Qmeas,n - Qoffset – Qoffsettemp. Among them, LOS indication2 is the second LOS indication value, and Signal strength2 is the second signal strength value. For example, Signal strength2 can be RSRP.

[0175] In some embodiments, a score for the second parameter value is determined; the score of the second parameter value and the received signal quality of the candidate target cell are summed; the sum of these two values ​​is subtracted from the difference in received signal quality requirements between the serving cell and the candidate target cell, and then subtracted from the compensation offset value, to obtain the signal quality Rn of the candidate target cell. In some embodiments, the score of the second parameter value is the score of the second LOS indication value and / or the score of the second signal strength value. When the score of the second parameter value is the score of the second LOS indication value and the score of the second signal strength value, the score of the second parameter value can be the sum of the scores of the second LOS indication value and the second signal strength value, or it can be the average of the scores of the second LOS indication value and the second signal strength value, or a value determined based on the scores of the second LOS indication value and the second signal strength value; this application does not limit this. Optionally, the score of the second LOS indication value = C * the second LOS indication value, where C is a preset value. Optionally, the score of the second LOS indication value is determined based on a mapping table, which is used to indicate the scores of different second LOS indication values ​​corresponding to different ranges of second LOS indication values. Optionally, the score of the second signal strength value = D * the first signal strength value, where D is a preset value. Optionally, the score of the second signal strength value is determined based on a mapping table, which is used to indicate the scores of different second signal strength values ​​corresponding to different ranges of second signal strength values. The above determination of the score of the second LOS indication value and the score of the second signal strength value are merely exemplary, and this application does not limit them. Optionally, the signal quality of the candidate target cell Rn = LOS indication2 score + Qmeas,n - Qoffset – Qoffsettemp. Optionally, Rn = Signal strength2 score + Qmeas,n - Qoffset – Qoffsettemp. Optionally, Rn = LOS indication2 score + Signal strength2 score + Qmeas,n - Qoffset – Qoffsettemp. Wherein, the above LOS indication2 score is the score of the second LOS indication, and the Signal strength2 score is the score of the second signal strength value.

[0176] The above method fully considers the first parameter value, the received signal quality of the serving cell, cell reselection hysteresis, and compensation offset value when determining the signal quality of the serving cell. For the candidate target cell, it fully considers the second parameter value, the received signal quality of the candidate target cell, the difference between the received signal quality requirements of the serving cell and the candidate target cell, and the compensation offset value. This makes the determination of the service quality of the serving cell and the candidate target cell more comprehensive and accurate, which is beneficial for performing cell reselection based on this service quality.

[0177] In some embodiments, the candidate target cell is a cell in the same frequency as the serving cell, or the candidate target cell is a cell in a different frequency with the same priority as the serving cell.

[0178] In method 2 described above, the candidate target cell is either a co-frequency cell of the serving cell or a hetero-frequency cell with the same priority as the serving cell. This means the priority of the candidate target cell is equal to that of the serving cell, implying that the serving cell and the candidate target cell have the same coverage, signal strength, available resources, or can provide the same quality of service. Therefore, in this case, the ranking of the serving cell and the candidate target cell needs to be considered during the cell reselection process. The cell with the higher ranking should be designated as the serving cell for the terminal device to ensure it provides higher-quality communication services.

[0179] Method 3

[0180] In some embodiments, performing cell reselection based on first information and / or second information includes: performing reselection to the candidate target cell when the serving cell meets a third condition and the candidate target cell meets a fourth condition; wherein the third condition includes: a first parameter value is less than a fourth threshold; and / or, the fourth condition includes: a second parameter value is greater than a fifth threshold.

[0181] When the first parameter value of the serving cell is lower than the fourth threshold, it indicates that the signal quality of the serving cell has deteriorated to a certain extent, and it cannot provide stable and reliable communication services to the terminal device. When the second parameter value of the candidate target cell is higher than the fifth threshold, it indicates that the candidate target cell can provide better signal quality, and the terminal device reselects to the candidate target cell. The above method, by combining the first parameter value of the serving cell and the second parameter value of the candidate target cell, can more comprehensively determine cell reselection, thereby ensuring the accuracy of cell reselection.

[0182] In some embodiments, the third condition further includes: the received signal strength of the serving cell is less than a third strength threshold, and / or, the received signal quality of the serving cell is less than a third quality threshold; and / or, the fourth condition further includes: the received signal strength of the candidate target cell is greater than a fourth strength threshold, and / or, the received signal quality of the candidate target cell is greater than a fourth quality threshold. For details regarding the received signal strength of the serving cell, the received signal quality of the serving cell, the received signal strength of the candidate target cell, and the received signal quality of the candidate target cell, please refer to the corresponding descriptions above; they will not be repeated here.

[0183] The above method, in determining the conditions for performing cell reselection, also considers the received signal strength of the serving cell / candidate target cell and / or the received signal quality of the serving cell / candidate target cell, making the determination of the conditions for performing cell reselection more comprehensive and accurate.

[0184] In some embodiments, the aforementioned fourth and / or fifth thresholds, as well as the third strength and / or third quality thresholds, are indicated or preset by the network device via unicast or broadcast messages. For details regarding unicast or broadcast messages or presets, please refer to the corresponding descriptions above.

[0185] In some embodiments, the candidate target cell is a different frequency cell of the serving cell, and the priority of the candidate target cell is lower than that of the serving cell.

[0186] In method 3 described above, the candidate target cell is a lower-priority inter-frequency cell, meaning its priority is lower than that of the serving cell. This implies that, under normal circumstances, the terminal device will prioritize maintaining its connection with the serving cell, and will only consider reselecting to the candidate target cell when a specific condition (i.e., the fourth condition mentioned above) is met. In this case, unlike the case where only the second parameter value of the candidate target cell is considered when its priority is higher than that of the serving cell, the determination of cell reselection also requires comprehensive consideration of the first parameter value of the serving cell and the magnitude of the fourth threshold to ensure the accuracy of cell reselection.

[0187] Please refer to Figure 6, which shows a flowchart of a cell measurement method provided in another embodiment of this application. The method may include the following steps S1 to S3.

[0188] In step S1, the network device indicates a threshold to the terminal device, which may include at least one of a third threshold, a fourth threshold, a fifth threshold, a second strength threshold, a second quality threshold, a third strength threshold, and a third quality threshold. Accordingly, the terminal device receives the threshold. Step S1a is used to indicate the threshold via a unicast message, and step S1b is used to indicate the threshold via a broadcast message. The threshold may also be preset (e.g., factory preset for the terminal), which is not limited in this application.

[0189] In step S2, the terminal device determines a first LOS indication value and / or a first signal strength value, and a second LOS indication value and / or a second signal strength value. The terminal device determines the first LOS indication value and / or the first signal strength value by measuring a reference signal transmitted by the network device corresponding to the serving cell. The terminal device determines the second LOS indication value and / or the second signal strength value by measuring a reference signal transmitted by the network device corresponding to the candidate target cell.

[0190] Step S3: The terminal device determines whether to trigger cell measurement. The terminal device determines whether to perform cell reselection by determining the relationship between the first LOS indication value and / or the first signal strength value, and the second LOS indication value and / or the second signal strength value, and the corresponding thresholds mentioned above. For details, please refer to the relevant content above; this application will not repeat them here.

[0191] The following are embodiments of the apparatus described in this application, which can be used to execute the embodiments of the method described in this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the method described in this application.

[0192] Please refer to Figure 7, which shows a block diagram of a cell measurement device according to an embodiment of this application. This device has the function of implementing the cell measurement method described above; the function can be implemented by hardware or by hardware executing corresponding software. This device can be the terminal device described above, or it can be installed within a terminal device. As shown in Figure 7, the device 700 may include a processing module 710.

[0193] The processing module 710 is used to perform cell measurement based on first information, which is related to the signal propagation path between the terminal device and the serving cell.

[0194] In some embodiments, the first information includes a first parameter value, which is used to indicate LOS direct path related information between the terminal device and the serving cell.

[0195] In some embodiments, the first parameter value includes a first LOS indication value, which is used to indicate the possibility of the LOS direct path existing between the terminal device and the serving cell, or the first LOS indication value is used to indicate whether the LOS direct path exists between the terminal device and the serving cell.

[0196] In some embodiments, the first parameter value includes a first signal strength value, which is used to indicate the signal strength of a first path of arrival, wherein the first path of arrival is the path through which the signal from the serving cell first reaches the terminal device in at least one signal propagation path between the terminal device and the serving cell.

[0197] In some embodiments, the first parameter value includes a first LOS indication value, and the processing module 710 is configured to perform cell measurement when a first condition is met, the first condition including: the first LOS indication value is less than a first threshold.

[0198] In some embodiments, the first parameter value includes a first signal strength value, and the processing module 710 is configured to perform cell measurement when a first condition is met, the first condition including: the first signal strength value is less than a second threshold.

[0199] In some embodiments, the first parameter value includes a first LOS indication value and a first signal strength value. The processing module 710 is configured to perform cell measurement when a first condition is met, the first condition including: the first LOS indication value is less than a first threshold, and / or, the first signal strength value is less than a second threshold.

[0200] In some embodiments, the first condition further includes: the received signal strength of the serving cell is less than a first strength threshold, and / or the received signal quality of the serving cell is less than a first quality threshold.

[0201] In some embodiments, the processing module 710 is configured to perform cell measurements for co-frequency cells or inter-frequency cells of the serving cell when the first condition is met, wherein the inter-frequency cells have the same or lower priority relative to the serving cell.

[0202] In some embodiments, the first threshold and / or the second threshold are indicated or preset by the network device via unicast or broadcast messages.

[0203] Please refer to Figure 8, which shows a block diagram of a cell reselection device according to an embodiment of this application. This device has the function of implementing the above-described cell reselection method; the function can be implemented in hardware or by hardware executing corresponding software. This device can be the terminal device described above, or it can be installed within a terminal device. As shown in Figure 8, the device 800 may include a processing module 810.

[0204] The processing module 810 is configured to perform cell reselection based on first information and / or second information, wherein the first information is related to the signal propagation path between the terminal device and the serving cell, and the second information is related to the signal propagation path between the terminal device and the candidate target cell.

[0205] In some embodiments, the first information includes a first parameter value, which is used for LOS direct path related information between the terminal device and the serving cell; and / or, the second information includes a second parameter value, which is used for LOS direct path related information between the terminal device and the candidate target cell.

[0206] In some embodiments, the first parameter value includes a first LOS indication value, which indicates the possibility that the LOS direct path exists between the terminal device and the serving cell, or the first LOS indication value indicates whether the LOS direct path exists between the terminal device and the serving cell; and / or, the second parameter value includes a second LOS indication value, which indicates the possibility that the LOS direct path exists between the terminal device and the candidate target cell, or the second LOS indication value indicates whether the LOS direct path exists between the terminal device and the candidate target cell.

[0207] In some embodiments, the first parameter value includes a first signal strength value, which indicates the signal strength of a first path of arrival, wherein the first path of arrival is the path in which the signal from the serving cell first arrives at the terminal device in at least one signal propagation path between the terminal device and the serving cell; and / or, the second parameter value includes a second signal strength value, which indicates the signal strength of a second path of arrival, wherein the second path of arrival is the path in which the signal from the candidate target cell first arrives at the terminal device in at least one signal propagation path between the terminal device and the candidate target cell.

[0208] In some embodiments, the processing module 810 is configured to perform a reselection to the candidate target cell if the candidate target cell meets a second condition, wherein the second condition includes: the value of the second parameter is greater than a third threshold.

[0209] In some embodiments, the second condition further includes: the received signal strength of the candidate target cell is greater than a second strength threshold, and / or the received signal quality of the candidate target cell is greater than a second quality threshold.

[0210] In some embodiments, the candidate target cell is a different frequency cell of the serving cell, and the priority of the candidate target cell is higher than the priority of the serving cell.

[0211] In some embodiments, the third threshold is indicated or preset by the network device via a unicast or broadcast message.

[0212] In some embodiments, the processing module 810 is configured to determine the signal quality of the serving cell based on the first parameter value; and / or determine the signal quality of the candidate target cell based on the second parameter value; sort the serving cell and the candidate target cell based on the signal quality of the serving cell and the signal quality of the candidate target cell, and perform cell reselection based on the sorting result.

[0213] In some embodiments, the signal quality of the serving cell is determined based on at least one of the following: the first parameter value, the received signal quality of the serving cell, cell reselection hysteresis, and compensation offset value; and / or, the signal quality of the candidate target cell is determined based on at least one of the following: the second parameter value, the received signal quality of the candidate target cell, the difference between the received signal quality requirements of the serving cell and the candidate target cell, and compensation offset value.

[0214] In some embodiments, the candidate target cell is a co-frequency cell of the serving cell, or the candidate target cell is a different-frequency cell with the same priority as the serving cell.

[0215] In some embodiments, the processing module 810 is configured to perform a reselection to the candidate target cell when the serving cell meets a third condition and the candidate target cell meets a fourth condition; wherein the third condition includes: the first parameter value is less than a fourth threshold; and / or, the fourth condition includes: the second parameter value is greater than a fifth threshold.

[0216] In some embodiments, the third condition further includes: the received signal strength of the serving cell is less than a third strength threshold, and / or the received signal quality of the serving cell is less than a third quality threshold; and / or, the fourth condition further includes: the received signal strength of the candidate target cell is greater than a fourth strength threshold, and / or the received signal quality of the candidate target cell is greater than a fourth quality threshold.

[0217] In some embodiments, the candidate target cell is a different frequency cell of the serving cell, and the priority of the candidate target cell is lower than that of the serving cell.

[0218] In some embodiments, the fourth threshold and / or the fifth threshold are indicated or preset by the network device via unicast or broadcast messages.

[0219] It should be noted that the above embodiments only illustrate the division of the above functional modules when implementing the device. In actual applications, the above functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0220] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here. For details not described in detail in the apparatus embodiments, please refer to the above method embodiments.

[0221] Please refer to Figure 9, which shows a schematic diagram of the structure of a terminal device provided in one embodiment of this application. The terminal device can be the terminal device described above. The terminal device 900 may include: a processor 901, a transceiver 902, and a memory 903. The transceiver 902 is used to implement sending or receiving functions. The processor 901 can be used to implement other processing functions or control sending and / or receiving, such as implementing the functions of the processing modules described above.

[0222] The processor 901 includes one or more processing cores. The processor 901 executes various functional applications and information processing by running software programs and modules.

[0223] The transceiver 902 may include a receiver and a transmitter. For example, the receiver and transmitter may be implemented as the same wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0224] The memory 903 can be connected to the processor 901 and the transceiver 902.

[0225] The memory 903 can be used to store a computer program executed by the processor, and the processor 901 is used to execute the computer program to implement the various steps in the above method embodiments.

[0226] In some embodiments, the processor 901 is configured to perform cell measurement based on first information, which relates to the signal propagation path between the terminal device and the serving cell.

[0227] In some embodiments, the processor 901 is further configured to perform cell reselection based on first information and / or second information, wherein the first information relates to the signal propagation path between the terminal device and the serving cell, and the second information relates to the signal propagation path between the terminal device and the candidate target cell.

[0228] For details not described in this embodiment, please refer to the embodiments above, which will not be repeated here.

[0229] Furthermore, the memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory, erasable programmable read-only memory, statically accessible memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0230] This application also provides a computer-readable storage medium storing a computer program for execution by a processor to implement the cell measurement method or cell reselection method performed by the terminal device described above. In some embodiments, the computer-readable storage medium may include ROM (Read-Only Memory), RAM (Random-Access Memory), SSD (Solid State Drives), or optical disc, etc. The random access memory may include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

[0231] This application also provides a chip, which includes programmable logic circuits and / or program instructions. When the chip is running, it is used to implement the cell measurement method or cell reselection method executed by the terminal device described above.

[0232] This application also provides a chip, which includes programmable logic circuitry and / or program instructions. When the chip is running in a terminal device, it is used to: perform cell measurement based on first information, wherein the first information is related to the signal propagation path between the terminal device and the serving cell. When the chip is running in the terminal device, it is also used to implement other steps performed by the terminal device as described in the above embodiments, which will not be repeated here.

[0233] This application also provides a chip, which includes programmable logic circuitry and / or program instructions. When the chip is run in a terminal device, it is used to: perform cell reselection based on first information and / or second information, wherein the first information is related to the signal propagation path between the terminal device and the serving cell, and the second information is related to the signal propagation path between the terminal device and the candidate target cell. When the chip is run in the terminal device, it is also used to implement other steps performed by the terminal device as described in the above embodiments, which will not be repeated here.

[0234] This application also provides a computer program product, which includes computer instructions stored in a computer-readable storage medium. A processor reads and executes the computer instructions from the computer-readable storage medium to implement the cell measurement method or cell reselection method executed by the terminal device described above.

[0235] It should be understood that the term "instruction" mentioned in the embodiments of this application can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0236] In the description of the embodiments of this application, the term "correspondence" may indicate that there is a direct or indirect correspondence between two things, or that there is an association between two things, or that there is a relationship of instruction and being instructed, configuration and being configured, etc.

[0237] In some embodiments of this application, "predefined" can be achieved by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices). This application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol.

[0238] In some embodiments of this application, the term "protocol" may refer to standard protocols in the field of communications, such as LTE protocols, NR protocols, and related protocols applied in future communication systems. This application does not limit the scope of these protocols.

[0239] In this article, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0240] In this article, "greater than or equal to" can mean greater than or equal to, and "less than or equal to" can mean less than or equal to.

[0241] Furthermore, the step numbers described herein are merely illustrative of one possible execution order between steps. In some other embodiments, the steps may not be executed in the order of their numbers, such as two steps with different numbers being executed simultaneously, or two steps with different numbers being executed in the reverse order of the illustration. This application does not limit this.

[0242] Those skilled in the art will recognize that the functions described in the embodiments of this application in one or more of the above examples can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0243] The above description is merely an exemplary embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cell measurement method, characterized by, The method is executed by a terminal device, and the method includes: Cell measurements are performed based on first information, which relates to the signal propagation path between the terminal device and the serving cell.

2. The method of claim 1, wherein, The first information includes a first parameter value, which is used to indicate LOS direct path related information between the terminal device and the serving cell.

3. The method of claim 2, wherein, The first parameter value includes a first LOS indication value, which is used to indicate the possibility of the LOS direct path existing between the terminal device and the serving cell, or the first LOS indication value is used to indicate whether the LOS direct path exists between the terminal device and the serving cell.

4. The method according to claim 2 or 3, characterized in that, The first parameter value includes a first signal strength value, which indicates the signal strength of a first path of arrival. The first path of arrival is the path through which the signal from the serving cell first reaches the terminal device in at least one signal propagation path between the terminal device and the serving cell.

5. The method according to any one of claims 2 to 4, characterized in that, The first parameter value includes a first LOS indication value, and the step of performing cell measurement based on the first information includes: Cell measurement is performed if a first condition is met, the first condition including: the first LOS indication value is less than a first threshold.

6. The method according to any one of claims 2 to 4, characterized in that, The first parameter value includes a first signal strength value, and the step of performing cell measurement based on the first information includes: Cell measurement is performed if a first condition is met, the first condition including: the first signal strength value is less than a second threshold.

7. The method according to any one of claims 2 to 4, characterized in that, The first parameter value includes a first LOS indication value and a first signal strength value. The step of performing cell measurement based on the first information includes: Cell measurement is performed if a first condition is met, the first condition including: the first LOS indication value is less than a first threshold, and / or, the first signal strength value is less than a second threshold.

8. The method according to any one of claims 5 to 7, characterized in that, The first condition further includes: the received signal strength of the serving cell is less than a first strength threshold, and / or the received signal quality of the serving cell is less than a first quality threshold.

9. The method according to any one of claims 5 to 8, characterized in that, The step of performing cell measurement when the first condition is met includes: If the first condition is met, cell measurements are performed on co-frequency or inter-frequency cells of the serving cell, wherein the inter-frequency cells have the same or lower priority relative to the serving cell.

10. The method according to any one of claims 5 to 9, characterized in that, The first threshold and / or the second threshold are indicated or preset by the network device via unicast or broadcast messages.

11. A cell reselection method, characterized by, The method is executed by a terminal device, and the method includes: Cell reselection is performed based on first information and / or second information, wherein the first information relates to the signal propagation path between the terminal device and the serving cell, and the second information relates to the signal propagation path between the terminal device and the candidate target cell.

12. The method according to claim 11, characterized in that, The first information includes a first parameter value, which is used for LOS direct path related information between the terminal device and the serving cell; and / or, The second information includes a second parameter value, which is used for LOS direct path related information between the terminal device and the candidate target cell.

13. The method according to claim 12, characterized in that, The first parameter value includes a first LOS indication value, which is used to indicate the possibility of the LOS direct path existing between the terminal device and the serving cell, or the first LOS indication value is used to indicate whether the LOS direct path exists between the terminal device and the serving cell; And / or, The second parameter value includes a second LOS indication value, which is used to indicate the possibility of the LOS direct path between the terminal device and the candidate target cell, or the second LOS indication value is used to indicate whether the LOS direct path exists between the terminal device and the candidate target cell.

14. The method according to claim 12, characterized in that, The first parameter value includes a first signal strength value, which is used to indicate the signal strength of a first path of arrival. The first path of arrival is the path through which the signal from the serving cell first reaches the terminal device in at least one signal propagation path between the terminal device and the serving cell. And / or, The second parameter value includes a second signal strength value, which indicates the signal strength of a second path of arrival. The second path of arrival is the path through which the signal from the candidate target cell first reaches the terminal device in at least one signal propagation path between the terminal device and the candidate target cell.

15. The method according to any one of claims 12 to 14, characterized in that, The step of performing cell reselection based on the first information and / or the second information includes: If the candidate target cell meets the second condition, the cell is reselected to the candidate target cell. The second condition includes: the value of the second parameter is greater than the third threshold.

16. The method of claim 15, wherein, The second condition further includes: the received signal strength of the candidate target cell is greater than the second strength threshold, and / or the received signal quality of the candidate target cell is greater than the second quality threshold.

17. The method according to claim 15 or 16, characterized in that, The candidate target cell is a frequency-dependent cell of the serving cell, and the priority of the candidate target cell is higher than that of the serving cell.

18. The method according to any one of claims 15 to 17, characterized in that, The third threshold is indicated or preset by the network device via unicast or broadcast messages.

19. The method according to any one of claims 12 to 14, characterized in that, The step of performing cell reselection based on the first information and / or the second information includes: Based on the first parameter value, determine the signal quality of the serving cell; and / or, based on the second parameter value, determine the signal quality of the candidate target cell; Based on the signal quality of the serving cell and the signal quality of the candidate target cell, the serving cell and the candidate target cell are ranked, and cell reselection is performed based on the ranking result.

20. The method according to claim 19, characterized in that, The signal quality of the serving cell is determined based on at least one of the following: the first parameter value, the received signal quality of the serving cell, cell reselection hysteresis, and the compensation offset value; and / or, The signal quality of the candidate target cell is determined based on at least one of the following: the second parameter value, the received signal quality of the candidate target cell, the difference between the received signal quality requirements of the serving cell and the candidate target cell, and the compensation offset value.

21. The method of claim 19 or 20, wherein, The candidate target cell is a cell in the same frequency as the serving cell, or the candidate target cell is a cell in a different frequency with the same priority as the serving cell.

22. The method according to any one of claims 12 to 14, characterized in that, The step of performing cell reselection based on the first information and / or the second information includes: If the serving cell meets the third condition and the candidate target cell meets the fourth condition, then a reselection to the candidate target cell is performed. The third condition includes: the value of the first parameter is less than the fourth threshold; and / or, the fourth condition includes: the value of the second parameter is greater than the fifth threshold.

23. The method according to claim 22, characterized in that, The third condition further includes: the received signal strength of the serving cell is less than a third strength threshold, and / or, the received signal quality of the serving cell is less than a third quality threshold; and / or, The fourth condition further includes: the received signal strength of the candidate target cell is greater than the fourth strength threshold, and / or the received signal quality of the candidate target cell is greater than the fourth quality threshold.

24. The method of claim 22 or 23, wherein, The candidate target cell is a frequency-dependent cell of the serving cell, and the priority of the candidate target cell is lower than that of the serving cell.

25. The method of any one of claims 22 to 24, wherein, The fourth threshold and / or the fifth threshold are indicated or preset by the network device via unicast or broadcast messages.

26. A cell measurement apparatus, characterized by comprising: The device includes: a processing module; The processing module is used to perform cell measurement based on first information, which is related to the signal propagation path between the terminal device and the serving cell.

27. A cell reselection apparatus, comprising: The device includes: a processing module; The processing module is configured to perform cell reselection based on first information and / or second information, wherein the first information is related to the signal propagation path between the terminal device and the serving cell, and the second information is related to the signal propagation path between the terminal device and the candidate target cell.

28. A terminal device, comprising: The communication device includes a processor and a memory, the memory storing a computer program, the processor executing the computer program to implement the method as claimed in any one of claims 1 to 10, or to implement the method as claimed in any one of claims 11 to 25.

29. A computer-readable storage medium, characterized in that, The storage medium stores a computer program that is executed by a processor to implement the method as described in any one of claims 1 to 10, or the method as described in any one of claims 11 to 25.

30. A chip, characterized by The chip includes programmable logic circuitry and / or program instructions, which, when the chip is running, are used to implement the method as described in any one of claims 1 to 10, or to implement the method as described in any one of claims 11 to 25.

31. A computer program product, characterised in that, The computer program product includes computer instructions stored in a computer-readable storage medium, which a processor reads from and executes to implement the method as claimed in any one of claims 1 to 10, or the method as claimed in any one of claims 11 to 25.

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