Patent Publication Number: US-2021185551-A1

Title: Measurement method, configuration method and device

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is continuation application of PCT International Application No. PCT/CN2019/100529 filed on Aug. 14, 2019, which claims priority to Chinese Patent Application No. 201810949203.3 filed on Aug. 20, 2018 in China, the disclosures of which are incorporated in their entireties by reference herein. 
    
    
     TECHNICAL FIELD 
     Embodiments of the present disclosure relate to the field of communications technologies, and specifically, to a measurement method, a configuration method, a terminal, and a device. 
     BACKGROUND 
     In a long term evolution (LTE) system, the idle state protocol defines configuration related to idle state measurement and a condition for triggering neighboring cell measurement. 
     A terminal chooses not to perform neighboring cell measurement when a serving cell meets the following requirements: Cell selection received signal strength value (S rxlev )&gt;Intra-frequency measurement start reference signal received power (RSRP) threshold (S IntraSearchP ), and Cell selection signal quality value (S qual )&gt;Intra-frequency measurement start reference signal received power (RSRQ) threshold (S IntraSearchQ ). Otherwise, if the value is lower than the threshold, the terminal needs to perform neighboring cell measurement. 
     The foregoing neighboring cell measurement thresholds may be configured by a network side. When they have not been configured by the network side, the protocol stipulates that when a measurement result of a current cell does not meet criterion S for multiple consecutive times, neighboring cell measurement will be triggered. 
     However, related threshold configuration manners cause the terminal to measure and/or track a neighboring cell for a plurality of times, which goes against power saving of the terminal. 
     SUMMARY 
     An object of the embodiments of the present disclosure is to provide a measurement method, a configuration method, and a device, so as to solve a problem of an excessive number of times of neighboring cell measurement and/or tracking performed by a terminal. 
     According to a first aspect, an embodiment of the present disclosure provides a measurement method, applied to a terminal. The method includes: 
     receiving a threshold of a measurement quantity configured by a network device; and 
     determining to measure and/or track a target neighboring cell corresponding to a first condition when the threshold of the measurement quantity and a value of a measurement quantity of a cell in which the terminal is located or a neighboring cell meet the first condition. 
     According to a second aspect, an embodiment of the present disclosure further provides a configuration method, applied to a network device. The method includes: 
     configuring a threshold of a measurement quantity for a terminal, so that the terminal determines to measure and/or track a target neighboring cell corresponding to a first condition when the threshold of the measurement quantity and a value of a measurement quantity of a cell in which the terminal is located or a neighboring cell meet the first condition. 
     According to a third aspect, an embodiment of the present disclosure further provides a terminal, including: 
     a receiving module, configured to receive a threshold of a measurement quantity configured by a network device; and 
     a processing module, configured to determine to measure and/or track a target neighboring cell corresponding to a first condition when the threshold of the measurement quantity and a value of a measurement quantity of a cell in which the terminal is located or a neighboring cell meet the first condition. 
     According to a fourth aspect, an embodiment of the present disclosure further provides a network device, including: 
     a configuration module, configured to configure a threshold of a measurement quantity for a terminal, so that the terminal determines to measure and/or track a target neighboring cell corresponding to a first condition when the threshold of the measurement quantity and a value of a measurement quantity of a cell in which the terminal is located or a neighboring cell meet the first condition. 
     According to a fifth aspect, an embodiment of the present disclosure provides a terminal, including: a processor, a memory, and a program stored in the memory and executable on the processor. The program, when executed by the processor, implements the steps of the foregoing measurement method. 
     According to a sixth aspect, an embodiment of the present disclosure provides a network device, including: a processor, a memory, and a program stored in the memory and executable on the processor. The program, when executed by the processor, implements the steps of the foregoing configuration method. 
     According to a seventh aspect, an embodiment of the present disclosure further provides a computer readable storage medium. The computer readable storage medium stores a computer program. The computer program, when executed by a processor, implements the steps of the foregoing measurement method or the steps of the foregoing configuration method. 
     The embodiments of the present disclosure can reduce a number of times of neighboring cell measurement and/or tracking performed by a terminal, so as to achieve an objective of power saving. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       It becomes clear for a person of ordinary skill in the art to learn various other advantages and benefits by reading detailed description of the following optional implementation manners. The accompanying drawings are merely used for showing the optional implementation manners, and are not considered as a limitation on the present disclosure. In all the accompanying drawings, a same reference symbol is used to indicate a same part. In the accompanying drawings: 
         FIG. 1  is a schematic architectural diagram of a wireless communications system according to an embodiment of the present disclosure; 
         FIG. 2  is a flowchart of a measurement method according to an embodiment of the present disclosure; 
         FIG. 3  is a flowchart of a configuration method according to an embodiment of the present disclosure; 
         FIG. 4  is a first structural diagram of a terminal according to an embodiment of the present disclosure; 
         FIG. 5  is a first structural diagram of a network device according to an embodiment of the present disclosure; 
         FIG. 6  is a second structural diagram of a terminal according to an embodiment of the present disclosure; and 
         FIG. 7  is a second structural diagram of a network device according to an embodiment of the present disclosure. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The following clearly describes the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are some rather than all of the embodiments of the present disclosure. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure. 
     The term “include” and any other variants in the specification and claims of this application are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that includes a list of steps or units is not necessarily limited to those expressly listed steps or units, but may include other steps or units not expressly listed or inherent to such a process, method, product, or device. In addition, “and/or” used in the specification and claims means at least one of the connected objects. For example, A and/or B represents the following three cases: Only A exists, only B exists, and both A and B exist. 
     In the embodiments of the present disclosure, the word such as “exemplary” or “example” is used to represent giving an example, an illustration, or a description. Any embodiment or design scheme described as an “exemplary” or “example” in the embodiments of the present disclosure should not be explained as being more preferred or having more advantages than another embodiment or design scheme. Exactly, use of the word such as “exemplary” or “example” is intended to present a concept in a specific manner. 
     Technologies described herein are not limited to a long time evolution (LTE)/LTE-advanced (LTE-A) system, and can also be used in various wireless communications systems, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single-carrier frequency-division multiple access (SC-FDMA), and other systems. 
     The terms “system” and “network” are often used interchangeably. The CDMA system can implement radio technologies such as CDMA2000 and Universal Terrestrial Radio Access (UTRA). UTRA includes wideband CDMA (WCDMA) and other CDMA variants. The 
     TDMA system can implement radio technologies such as a global system for mobile communications (GSM). The OFDMA system can implement radio technologies such as ultra mobile broadband (UMB), evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, and Flash-OFDM. UTRA and E-UTRA are a part of the universal mobile telecommunications system (UMTS). LTE and more advanced LTE (such as LTE-A) are new UMTS versions that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents of the organization named “3rd Generation Partnership Project (3GPP)”. CDMA2000 and UMB are described in documents of the organization named “3rd Generation Partnership Project 2 (3GPP2)”. The technology described herein can be used in the above-mentioned systems and radio technologies as well as other systems and radio technologies. 
     The following describes the embodiments of the present disclosure with reference to the accompanying drawings. A measurement method, configuration method, and device provided in the embodiments of the present disclosure can be applied to a wireless communications system.  FIG. 1  is a schematic structural diagram of a wireless communications system according to an embodiment of the present disclosure. As shown in  FIG. 1 , the wireless communications system may include a network device  10  and a terminal. The terminal is denoted as user equipment (UE)  11 , and the UE  11  may communicate with the network device  10  (transmit signaling or data). In actual application, a connection between the devices is a wireless connection. For ease of visual indication of a connection relationship between the devices, solid lines are used for illustration in  FIG. 1 . It should be noted that the foregoing communications system can include a plurality of UEs  11 , and the network device  10  can communicate with plurality of UEs  11 . 
     The terminal provided in this embodiment of the present disclosure can be a mobile phone, a tablet computer, a laptop, an ultra-mobile personal computer (UMPC), a netbook, or personal digital assistant (PDA), a mobile Internet device (MID), a wearable device (Wearable Device), an in-vehicle device, or the like. 
     The network device  10  provided in this embodiment of the present disclosure may be a base station, and the base station may be a commonly used base station, or may be an evolved nodeB (evolved node base station, eNB), or may be a device such as a network device (for example, a next generation nodeB (next generation node base station, gNB) or a transmission and reception point (TRP)) in a 5G system. 
     Referring to  FIG. 2 , an embodiment of the present disclosure provides a measurement method. The method can be performed by a terminal, and specific steps are as follows. 
     Step  201 : Receive a threshold of a measurement quantity configured by a network device. 
     It should be noted that the threshold of the measurement quantity configured by the network device includes: a one-level threshold of the measurement quantity or a multi-level threshold of the measurement quantity, where the multi-level threshold of the measurement quantity is equivalent to a plurality of different thresholds of the measurement quantity. The multi-level threshold of the measurement quantity is configured, so that accuracy in determining neighboring cell measurement and/or tracking (tracking) can be improved, and a number of times of neighboring cell measurement by the terminal can be reduced. 
     Optionally, the one-level threshold or multi-level threshold of the measurement quantity used for neighboring cell measurement and configured for the terminal is received by using information carried in a broadcast message, a system message (for example, a system information block (SIB)), a dedicated radio resource control (RRC) message (for example, an RRC release (release) or RRC suspend (suspend) message) or a physical downlink control channel (PDCCH). 
     It should be noted that this embodiment of the present disclosure can be applied to an inter-frequency (inter-frequency) or inter-RAT (Inter-RAT) scenario. For example, in step  201 , when a priority of an inter-RAT (inter-RAT) frequency and/or a priority of an adjacent frequency are/is higher than a priority of a frequency of a cell in which the terminal is located, the one-level threshold or multi-level threshold of the measurement quantity configured by the network device is received. 
     The multi-level threshold of the measurement quantity means a plurality of thresholds of the measurement quantity. A number of the plurality of thresholds of the measurement quantity can be at least two. For example, the multi-level threshold of measurement quantity includes a first-level threshold and a second-level threshold, or a first-level threshold, a second-level threshold, and a third-level threshold, or a first-level threshold, a second-level threshold, a third-level threshold, and a fourth-level threshold. It can be understood that in this embodiment of the present disclosure, the multi-level threshold of the measurement quantity is not specifically limited. 
     The measurement quantity (measurement quantity) can also be referred to as a measurement performance value, and the measurement quantity indicates at least one of a signal to interference plus noise ratio (SINR), reference signal received power (RSRP), and reference signal received quality (RSRQ). 
     Step  202 : Determine to measure and/or track (tracking) a target neighboring cell corresponding to a first condition when the threshold of the measurement quantity and a value of a measurement quantity of a cell in which the terminal is located or a neighboring cell meet the first condition. 
     The cell in which the terminal is located includes a serving cell or a camped cell. 
     Optionally, prior to step  202 , the method further includes: receiving information that is related to a preset number of neighboring cells and/or a preset neighboring cell group that is configured by the network device. For example, the information that is related to the preset number of neighboring cells and/or the preset neighboring cell group and that is configured by network device is received by using information carried in a broadcast message, a system message, a dedicated RRC message, or a PDCCH. 
     For example, the information related to the preset number of neighboring cells or the preset neighboring cell group is used to explicitly or implicitly indicate the preset number of neighboring cells or the preset neighboring cell group, where each preset neighboring cell group may include one or more neighboring cells. 
     By means of dividing, the preset neighboring cell group may include: a first neighboring cell group, or a first neighboring cell group and a second neighboring cell group, or a first neighboring cell group, a second neighboring cell group, and the third neighboring cell group, or the like. In this embodiment of the present disclosure, there is no specific limitation on a specific manner of dividing the preset neighboring cell group. 
     Optionally, after step  202 , the method may further include: searching (search) for the target neighboring cell (that is, attempting (attempt) to search for the target neighboring cell), and measuring all or a first preset number of target neighboring cells found through searching, without attempting to search or measure a neighboring cell other than the target neighboring cell. 
     In this embodiment of the present disclosure, optionally, the threshold of the measurement quantity includes at least one of the following: a first threshold, a second threshold, and a third threshold. 
     The first condition may include at least one of the following: 
     the value of the measurement quantity of the cell in which the terminal is located is less than the first threshold; 
     the value of the measurement quantity of the neighboring cell is greater than the second threshold; and 
     a number of neighboring cells whose values of a corresponding measurement quantity are greater than the third threshold is greater than a second preset number, where 
     the target neighboring cell may include at least one of the following: 
     a neighboring cell in a preset first neighboring cell group; 
     a neighboring cell whose value of a corresponding measurement quantity is greater than the second threshold or the third threshold; and 
     a third preset number of neighboring cells. 
     It should be noted that this embodiment of the present disclosure does not impose specific limitation on the first threshold, the second threshold, the third threshold, the first preset number, the second preset number and the third preset number. 
     In this embodiment of the present disclosure, optionally, the threshold of the measurement quantity may include at least one of the following: a fourth threshold, a fifth threshold, a sixth threshold, a seventh threshold, and an eighth threshold. 
     The first condition may include at least one of the following: the value of the measurement quantity of the cell in which the terminal is located is less than the fourth threshold; 
     the value of the measurement quantity of the neighboring cell is greater than the fifth threshold; 
     a number of neighboring cells whose values of a corresponding measurement quantity are greater than the sixth threshold is greater than a fourth preset number; 
     a value of a measurement quantity of a currently measured or tracked neighboring cell is less than the seventh threshold; and 
     a value of a measurement quantity of the neighboring cell in the preset first neighboring cell group is less than the eighth threshold, where 
     the target neighboring cell may include at least one of the following: 
     a neighboring cell in a preset second neighboring cell group; 
     a neighboring cell whose value of a corresponding measurement quantity is greater than the fifth threshold or the sixth threshold; and 
     a fifth preset number of neighboring cells. 
     It should be noted that this embodiment of the present disclosure does not impose specific limitation on the fourth threshold, the fifth threshold, the sixth threshold, the seventh threshold, the eighth threshold, the fourth preset number, and the fifth preset number. 
     In this embodiment of the present disclosure, optionally, the first threshold is greater than the fourth threshold, the second threshold is greater than the fifth threshold, and the third threshold is greater than the sixth threshold; or 
     the first threshold is less than the fourth threshold, the second threshold is less than the fifth threshold, and the third threshold is less than the sixth threshold. 
     For example, the multi-level threshold of the measurement quantity is a two-level threshold of the measurement quantity. Optionally, the two-level threshold of the measurement quantity may include at least one of the first threshold, the second threshold, and the third threshold, and at least one of the fourth threshold, the fifth threshold, the sixth threshold, the seventh threshold, and the eighth threshold. 
     For example, the two-level threshold of the measurement quantity includes: the first threshold (the first-level threshold) and the fourth threshold (the second-level threshold), where the first threshold is 2 dB, the fourth threshold is 6 dB, and the value of the measurement quantity of the cell in which the terminal is located is 4 dB. In this case, the value of the measurement quantity of the cell in which the terminal is located is less than the fourth threshold, and the target neighboring cell may be the neighboring cell in the preset second neighboring cell group. 
     It can be understood that the foregoing description merely takes the multi-level threshold of the measurement quantity including the first-level threshold and the second-level threshold as an example. If the multi-level threshold of the measurement quantity further includes the third-level threshold or another-level threshold, a manner of setting the third-level threshold or another-level threshold is similar to the manner of setting the setting mode of the first-level threshold and the second-level threshold. Details are not described herein again. 
     In this embodiment of the present disclosure, optionally, that the value of the measurement quantity of the neighboring cell is greater than the second threshold or the fifth threshold includes at least one of the following: 
     values of a measurement quantity of a sixth preset number or all of neighboring cells in a neighboring cell list configured by a network are greater than the second threshold or the fifth threshold; 
     a number of neighboring cells whose values of a corresponding measurement quantity are greater than the second threshold or the fifth threshold is greater than the seventh preset number; 
     in a first preset time, values of a measurement quantity of an eighth preset number or all of neighboring cells in a neighboring cell list configured by a network are greater than the second threshold or the fifth threshold; and 
     in a second preset time, a number of neighboring cells whose values of a corresponding measurement quantity are greater than the second threshold or the fifth threshold is greater than a ninth preset number. 
     It should be noted that this embodiment of the present disclosure does not impose specific limitation on the first preset time, the second preset time, the sixth preset number, the seventh preset number, the eighth preset number, and the ninth preset number. 
     In this embodiment of the present disclosure, optionally, that the value of the measurement quantity of the neighboring cell is less than the seventh threshold or the eighth threshold includes at least one of the following: 
     values of a measurement quantity of a tenth preset number or all of neighboring cells in a neighboring cell list configured by a network are less than the seventh threshold or the eighth threshold; 
     a number of neighboring cells whose values of a corresponding measurement quantity are less than the seventh threshold or the eighth threshold is greater than an eleventh preset number; 
     in a third preset time, values of a measurement quantity of a twelfth preset number or all of neighboring cells in a neighboring cell list configured by a network are less than the seventh threshold or the eighth threshold; and 
     in a fourth preset time, a number of neighboring cells whose values of a corresponding measurement quantity are less than the seventh threshold or the eighth threshold is greater than a thirteenth preset number. 
     It should be noted that this embodiment of the present disclosure does not impose specific limitation on the third preset time, the fourth preset time, the tenth preset number, the eleventh preset number, the twelfth preset number, and the thirteenth preset number. 
     In this embodiment of the present disclosure, a number of times of neighboring cell measurement and/or tracking performed by the terminal can be reduced, thereby achieving an objective of power saving. 
     Referring to  FIG. 3 , an embodiment of the present disclosure provides a configuration method. The method can be performed by a network device, and specific steps are as follows. 
     Step  301 : Configure a threshold of a measurement quantity for a terminal, so that the terminal determines to measure and/or track a target neighboring cell corresponding to a first condition when the threshold of the measurement quantity and a value of a measurement quantity of a cell in which the terminal is located or a neighboring cell meet the first condition. 
     The measurement quantity (measurement quantity) can also be referred to as measurement performance, and the measurement quantity indicates at least one of a SINR, RSRP, and RSRQ. The threshold of the measurement quantity may be a one-level threshold of the measurement quantity or a multi-level threshold of the measurement quantity. 
     In this embodiment of the present disclosure, optionally, in step  301 , the threshold of the measurement quantity for the terminal is configured by using information carried in a broadcast message, a system message, a dedicated RRC message, or a PDCCH. 
     In this embodiment of the present disclosure, optionally, before or after step  301 , the method may further include: configuring information related to a preset number of neighboring cells and/or a preset neighboring cell group. For example, the information related to the preset number of neighboring cells and/or the preset neighboring cell group is configured by using information carried in a broadcast message, a system message, a dedicated RRC message, or a PDCCH. 
     It should be noted that for content, such as the threshold of the measurement quantity and the first condition, in the embodiment of the configuration method shown in  FIG. 3 , reference may be made to the embodiment of the measurement method shown in  FIG. 2 . Details are not described herein. 
     In this embodiment of the present disclosure, a number of times of neighboring cell measurement and/or tracking performed by the terminal can be reduced, thereby achieving an objective of power saving. 
     EXAMPLE 1 
     Step 1: A terminal receives an at-least-two-level threshold of a measurement quantity (measurement quantity) that is used for neighboring cell measurement and that is configured by a network device for the terminal by using information carried in a broadcast message, a system message (for example, system information block (SIB)), a dedicated radio resource control (RRC) message (for example, an RRC release (release) or RRC suspend (suspend) message), or a physical downlink control channel (PDCCH). 
     The measurement quantity may also be referred to as a measurement performance value. The measurement quantity indicates at least one of a SINR, RSRP, and RSRQ. 
     Optionally, the terminal receives information that is related to a preset number of cells and/or a preset neighboring cell group and that is configured for the terminal by using information carried in a broadcast message, a system message (for example, a SIB), a dedicated RRC message (for example, RRC release or RRC suspend), or a PDCCH. 
     Step 2: The terminal determines neighboring cell measurement and/or tracking (tracking) based on the received multi-level threshold of the measurement quantity and a value of a measurement quantity of a cell in which the terminal is located or a neighboring cell. 
     The cell in which the terminal is located includes a serving cell or a camped cell. 
     In step 2, when a first-level threshold of the multi-level threshold of the measurement quantity and the value of the measurement quantity of the cell in which the terminal is located or the neighboring cell meet a first condition, it is determined to measure and/or track a target neighboring cell, where the target neighboring cell corresponds to the first condition. 
     Optionally, after it is determined to measure and/or track the target neighboring cell, the method further includes: searching for the target neighboring cell (that is, attempting to search for the target neighboring cell), and measuring all or the first preset number of target neighboring cells found through searching. 
     It can be understood that no attempt is made to searching for or measuring a neighboring cell other than the target neighboring cell. 
     Optionally, the first-level threshold of the multi-level threshold of the measurement quantity includes at least one of the following: a first threshold, a second threshold, and a third threshold. 
     The first condition includes at least one of the following: 
     (1) the value of the measurement quantity of the cell in which the terminal is located is less than the first threshold; 
     (2) the value of the measurement quantity of the neighboring cell is greater than the second threshold; and 
     (3) a number of first neighboring cells is greater than a second preset number, where the first neighboring cell is a neighboring cell whose value of a measurement quantity is greater than the third threshold. 
     The second threshold may be the same as the third threshold, or the second threshold may be different from the third threshold. 
     Optionally, the target neighboring cell includes at least one of the following: 
     (1) a neighboring cell in a preset first neighboring cell group; 
     (2) a neighboring cell whose value of a corresponding measurement quantity is greater than the second threshold or the third threshold; and 
     (3) a third preset number of neighboring cells. 
     Optionally, a second-level threshold of the multi-level threshold of the measurement quantity includes at least one of the following: a fourth threshold, a fifth threshold, a sixth threshold, a seventh threshold, and an eighth threshold. 
     The first condition includes at least one of the following: 
     (1) the value of the measurement quantity of the cell in which the terminal is located is less than the fourth threshold; 
     (2) the value of the measurement quantity of the neighboring cell is greater than the fifth threshold; 
     (3) a number of second neighboring cells is greater than a fourth preset number, where the second neighboring cell is a neighboring cell whose value of a measurement quantity is greater than the sixth threshold; 
     (5) a value of a measurement quantity of a currently measured or tracked neighboring cell is less than the seventh threshold; and 
     (6) a value of a measurement quantity of the neighboring cell in the first neighboring cell group is less than the eighth threshold. 
     The fifth threshold may be the same as the sixth threshold, or the fifth threshold may be different from the sixth threshold. 
     Optionally, the target neighboring cell includes at least one of the following: 
     (1) a neighboring cell in a preset second neighboring cell group; 
     (2) a neighboring cell whose value of a corresponding measurement quantity is greater than the fifth threshold or the sixth threshold; and 
     (3) a fifth preset number of neighboring cells. 
     Alternatively, the first threshold is greater than the fourth threshold, the second threshold is greater than the fifth threshold, and the third threshold is greater than the sixth threshold; or the first threshold is less than the fourth threshold, the second threshold is less than the fifth threshold, and the third threshold is less than the sixth threshold. 
     It can be understood that the multi-level threshold of the measurement quantity may further include a third-level threshold and a fourth-level threshold. A specific implementation process is similar to the foregoing step 2, and details are not described herein again. To be specific, after the multi-level threshold of the measurement quantity is introduced, the foregoing step 2 can be continued, and neighboring cells in a neighboring cell list can be divided into a plurality of neighboring cell groups, namely, a third neighboring cell group and a fourth neighboring cell group. 
     Further, that the value of the measurement quantity of the neighboring cell is greater than the second threshold or the fifth threshold includes at least one of the following: 
     (1) values of a measurement quantity of a sixth preset number or all of neighboring cells in a neighboring cell list configured by a network are greater than the second threshold or the fifth threshold; 
     (2) a number of neighboring cells whose values of a corresponding measurement quantity are greater than the second threshold or the fifth threshold is greater than a seventh preset number; 
     (3) in a first preset time, values of a measurement quantity of an eighth preset number or all of neighboring cells in a neighboring cell list configured by a network are greater than the second threshold or the fifth threshold; and 
     (4) in a second preset time, a number of neighboring cells whose values of a corresponding measurement quantity are greater than the second threshold or the fifth threshold is greater than a ninth preset number. 
     Further, that the value of the measurement quantity of the neighboring cell is less than the seventh threshold or the eighth threshold includes at least one of the following: 
     (1) values of a measurement quantity of a tenth preset number or all of neighboring cells in a neighboring cell list configured by a network are less than the seventh threshold or the eighth threshold; 
     (2) a number of neighboring cells whose values of a corresponding measurement quantity are less than the seventh threshold or the eighth threshold is greater than an eleventh preset number; 
     (3) in a third preset time, values of a measurement quantity of a twelfth preset number or all of neighboring cells in a neighboring cell list configured by a network are less than the seventh threshold or the eighth threshold; and 
     (4) in a fourth preset time, a number of neighboring cells whose values of a corresponding measurement quantity are less than the seventh threshold or the eighth threshold is greater than a thirteenth preset number. 
     EXAMPLE 2: INTER-FREQUENCY (INTER-FREQUENCY) OR INTER-RAT (INTER-RAT) SCENARIO 
     When a priority of an inter-RAT frequency and/or a priority of an adjacent frequency are/is higher than a priority of a first frequency, the technical solution in Example 1 is implemented to measure and/or track a neighboring cell, where the first frequency is a frequency of a cell in which a terminal is located. 
     It should be noted that for content in Example 2 that is the same as that Example 1, reference may be made to Example 1. Details are not described herein again. 
     An embodiment of the present disclosure further provides a terminal. A principle of solving a problem by the terminal is similar to that of the measurement method in the embodiment of the present disclosure. Therefore, for implementation of the terminal, reference may be made to the implementation of the method, and details are not repeated again. 
     Referring to  FIG. 4 , an embodiment of the present disclosure provides a terminal. The terminal  400  includes: 
     a receiving module  401 , configured to receive a threshold of a measurement quantity configured by a network device; and 
     a processing module  402 , configured to determine to measure and/or track a target neighboring cell corresponding to a first condition when the threshold of the measurement quantity and a value of a measurement quantity of a cell in which the terminal is located or a neighboring cell meet the first condition. 
     In this embodiment of the present disclosure, optionally, the processing module  402  is further configured to: after it is determined to measure and/or track the target neighboring cell corresponding to the first condition, search for the target neighboring cell (that is, attempt to search for the target neighboring cell), and measure all or a first preset number of target neighboring cells found through searching. 
     In this embodiment of the present disclosure, optionally, the threshold of the measurement quantity includes at least one of the following: a first threshold, a second threshold, and a third threshold. 
     The first condition includes at least one of the following: 
     the value of the measurement quantity of the cell in which the terminal is located is less than the first threshold; 
     the value of the measurement quantity of the neighboring cell is greater than the second threshold; and 
     a number of neighboring cells whose values of a corresponding measurement quantity are greater than the third threshold is greater than a second preset number, where 
     the target neighboring cell includes at least one of the following: 
     a neighboring cell in a preset first neighboring cell group; 
     a neighboring cell whose value of a corresponding measurement quantity is greater than the second threshold or the third threshold; and 
     a third preset number of neighboring cells. 
     In this embodiment of the present disclosure, optionally, the threshold of the measurement quantity includes at least one of the following: a fourth threshold, a fifth threshold, a sixth threshold, a seventh threshold, and an eighth threshold. 
     The first condition includes at least one of the following: 
     the value of the measurement quantity of the cell in which the terminal is located is less than the fourth threshold; 
     the value of the measurement quantity of the neighboring cell is greater than the fifth threshold; 
     a number of neighboring cells whose values of a corresponding measurement quantity are greater than the sixth threshold is greater than a fourth preset number; 
     a value of a measurement quantity of a currently measured or tracked neighboring cell is less than the seventh threshold; and 
     a value of a measurement quantity of the neighboring cell in the preset first neighboring cell group is less than the eighth threshold, where 
     the target neighboring cell includes at least one of the following: 
     a neighboring cell in a preset second neighboring cell group; 
     a neighboring cell whose value of a corresponding measurement quantity is greater than the fifth threshold or the sixth threshold; and 
     a fifth preset number of neighboring cells. 
     In this embodiment of the present disclosure, optionally, the first threshold is greater than the fourth threshold, the second threshold is greater than the fifth threshold, and the third threshold is greater than the sixth threshold; or 
     the first threshold is less than the fourth threshold, the second threshold is less than the fifth threshold, and the third threshold is less than the sixth threshold. 
     In this embodiment of the present disclosure, optionally, that the value of the measurement quantity of the neighboring cell is greater than the second threshold or the fifth threshold includes at least one of the following: 
     values of a measurement quantity of a sixth preset number or all of neighboring cells in a neighboring cell list configured by a network are greater than the second threshold or the fifth threshold; 
     a number of neighboring cells whose values of a corresponding measurement quantity are greater than the second threshold or the fifth threshold is greater than a seventh preset number; 
     in a first preset time, values of a measurement quantity of an eighth preset number or all of neighboring cells in a neighboring cell list configured by a network are greater than the second threshold or the fifth threshold; and 
     in a second preset time, a number of neighboring cells whose values of a corresponding measurement quantity are greater than the second threshold or the fifth threshold is greater than a ninth preset number. 
     In this embodiment of the present disclosure, optionally, that the value of the measurement quantity of the neighboring cell is less than the seventh threshold or the eighth threshold includes at least one of the following: 
     values of a measurement quantity of a tenth preset number or all of neighboring cells in a neighboring cell list configured by a network are less than the seventh threshold or the eighth threshold; 
     a number of neighboring cells whose values of a corresponding measurement quantity are less than the seventh threshold or the eighth threshold is greater than an eleventh preset number; 
     in a third preset time, values of a measurement quantity of a twelfth preset number or all of neighboring cells in a neighboring cell list configured by a network are less than the seventh threshold or the eighth threshold; and 
     in a fourth preset time, a number of neighboring cells whose values of a corresponding measurement quantity are less than the seventh threshold or the eighth threshold is greater than a thirteenth preset number. 
     In this embodiment of the present disclosure, optionally, the receiving module  401  is further configured to: 
     receive, by using information carried in a broadcast message, a system message, a dedicated radio resource control RRC message, or a physical downlink control channel PDCCH, the threshold of the measurement quantity configured by the network device. 
     In this embodiment of the present disclosure, optionally, the receiving module  401  is further configured to receive information that is related to a preset number of neighboring cells and/or a preset neighboring cell group and that is configured by the network device. 
     In this embodiment of the present disclosure, optionally, the receiving module  401  is further configured to receive, by using information carried in a broadcast message, a system message, a dedicated RRC message, or a PDCCH, the information that is related to the preset number of neighboring cells and/or the preset neighboring cell group and that is configured by network device. 
     In this embodiment of the present disclosure, optionally, the receiving module  401  is further configured to: when a priority of an inter-RAT frequency and/or a priority of an adjacent frequency are/is higher than a priority of a frequency of the cell in which the terminal is located, receive the threshold of the measurement quantity configured by the network device. 
     The terminal provided in this embodiment of the present disclosure may perform the foregoing method embodiment. An implementation principle and a technical effect of the terminal are similar to those of the method embodiment, and details are not described again in this embodiment. 
     An embodiment of the present disclosure further provides a network device. Because a problem-solving principle of the network device is similar to that of the measurement method in the embodiments of the present disclosure, for implementation of the network device, reference may be made to implementation of the method, and described are not repeated herein. 
     Referring to  FIG. 5 , an embodiment of the present disclosure provides a network device. The network device  500  includes: 
     a configuration module  501 , configured to configure a threshold of a measurement quantity for a terminal, so that the terminal determines to measure and/or track a target neighboring cell corresponding to a first condition when the threshold of the measurement quantity and a value of a measurement quantity of a cell in which the terminal is located or a neighboring cell meet the first condition. 
     In this embodiment of the present disclosure, the configuration module  501  is further configured to configure a multi-level threshold of the measurement quantity for the terminal by using information carried in a broadcast message, a system message, a dedicated RRC message, or a PDCCH. 
     In this embodiment of the present disclosure, optionally, the configuration module  501  is further configured to configure information related to a preset number of neighboring cells and/or a preset neighboring cell group. 
     In this embodiment of the present disclosure, the configuration module  501  is further configured to configure, by using information carried in a broadcast message, a system message, a dedicated RRC message, or a PDCCH, information related to a preset number of neighboring cells and/or a preset neighboring cell group. 
     The network device provided in this embodiment of the present disclosure may perform the foregoing method embodiment. An implementation principle and a technical effect of the network device are similar to those of the method embodiment, and details are not described again in this embodiment. 
     As shown in  FIG. 6 , a terminal  600  shown in  FIG. 6  includes: at least one processor  601 , a memory  602 , at least one network interface  604 , and a user interface  603 . Various components of the terminal  600  are coupled by using a bus system  605 . It may be understood that the bus system  605  is configured to implement a connection and communication between these components. In addition to a data bus, the bus system  605  may include a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are marked as the bus system  605  in  FIG. 6 . 
     The user interface  603  may include a display, a keyboard, or a clicking device, for example, a mouse, a trackball, a touch panel, or a touchscreen. 
     It may be understood that the memory  602  in this embodiment of the present disclosure may be a volatile memory or a nonvolatile memory, or may include both a volatile memory and a nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), and is used as an external cache. By way of example but not limitative description, many forms of RAMs may be used, for example, a static random access memory (Static RAM, SRAM), a dynamic random access memory (Dynamic RAM, DRAM), a synchronous dynamic random access memory (Synchronous DRAM, SDRAM), a double data rate synchronous dynamic random access memory (Double Data rate SDRAM, DDRSDRAM), an enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), a synchlink dynamic random access memory (Synchlink DRAM, SLDRAM), and a direct rambus random access memory (Direct Rambus RAM, DRRAM). The memory  602  in the system and the method that are described in this embodiment of the present disclosure is intended to include but is not limited to these memories and a memory of any other proper type. 
     In some implementations, the memory  602  stores the following element: an executable module or a data structure, a subset of an executable module or a data structure, or an extended set of an executable module or a data structure: an operating system  6021  and an application program  6022 . 
     The operating system  6021  includes various system programs, for example, a framework layer, a kernel library layer, and a driver layer, and is configured to implement various basic services and process hardware-based tasks. The application program  6022  includes various application programs, for example, a media player (Media Player) and a browser (Browser), and is configured to implement various application services. A program for implementing the method in the embodiments of the present disclosure may be included in the application program  6022 . 
     In an embodiment of the present disclosure, when executed, a program or instruction stored in the memory  602 , which may be specifically a program or instruction stored in the application program  6022 , implements the following steps: receiving a threshold of a measurement quantity configured by a network device; and determining to measure and/or track a target neighboring cell corresponding to a first condition when the threshold of the measurement quantity and a value of a measurement quantity of a cell in which the terminal is located or a neighboring cell meet the first condition. 
     The terminal provided in this embodiment of the present disclosure may perform the foregoing method embodiment. An implementation principle and a technical effect of the terminal are similar to those of the method embodiment, and details are not described again in this embodiment. 
     Refer to  FIG. 7 .  FIG. 7  is a structural diagram of a network device applied in an embodiment of the present disclosure. As shown in  FIG. 7 , the network device  700  includes a processor  701 , a transceiver  702 , a memory  703 , and a bus interface. 
     In an embodiment of the present disclosure, the network device  700  further includes: a computer program stored in the memory  703  and capable of running on the processor  701 . The computer program, when executed by the processor  701 , implements the following steps: configuring a threshold of a measurement quantity for a terminal, so that the terminal determines to measure and/or track a target neighboring cell corresponding to a first condition when the threshold of the measurement quantity and a value of a measurement quantity of a cell in which the terminal is located or a neighboring cell meet the first condition. 
     In  FIG. 7 , the bus architecture may include any number of interconnected buses and bridges, which are specifically connected together by various circuits of one or more processors represented by the processor  701  and a memory represented by the memory  703 . The bus architecture may further connect together various other circuits of a peripheral device, a voltage stabilizer, a power management circuit, and the like, which are known in this art and will not be further described herein. The bus interface provides an interface. The transceiver  702  may include a plurality of elements, that is, include a transmitter and a receiver, and provide units for communication with various other apparatuses on a transmission medium. 
     The processor  701  is responsible for managing the bus architecture and common processing, and the memory  703  may store data used when the processor  701  performs an operation. 
     The network device provided in this embodiment of the present disclosure may perform the foregoing method embodiment. An implementation principle and a technical effect of the network device are similar to those of the method embodiment, and details are not described again in this embodiment. 
     Method or algorithm steps described in combination with the content disclosed in the present disclosure may be implemented by hardware, or may be implemented by a processor by executing a software instruction. The software instruction may be formed by a corresponding software module. The software module may be stored in a RAM, a flash memory, a ROM, an EPROM, an EEPROM, a register, a hard disk, a removable hard disk, a read-only compact disc, or a storage medium of any other form known in the art. For example, a storage medium is coupled to the processor, so that the processor can read information from the storage medium or write information into the storage medium. Certainly, the storage medium may be a component of the processor. The processor and the storage medium may be located in the ASIC. In addition, the ASIC may be located in a core network interface device. Certainly, the processor and the storage medium may exist in the core network interface device as discrete components. 
     A person skilled in the art should be aware that in the foregoing one or more examples, functions described in the present disclosure may be implemented by hardware, software, firmware, or any combination thereof. When implemented by software, the foregoing functions may be stored in a computer readable medium or transmitted as one or more instructions or code in the computer readable medium. The computer readable medium includes a computer storage medium and a communications medium, where the communications medium includes any medium that enables a computer program to be transmitted from one place to another. The storage medium may be any available medium accessible to a general-purpose or dedicated computer. 
     The objectives, technical solutions, and beneficial effects of the present disclosure are further described in detail in the foregoing specific embodiments. It should be understood that the foregoing descriptions are merely specific embodiments of the present disclosure, but are not intended to limit the protection scope of the present disclosure. Any modification, equivalent replacement, improvement, or the like made on a basis of the technical solutions of the present disclosure shall fall within the protection scope of the present disclosure. 
     A person skilled in the art should understand that the embodiments of the present disclosure may be provided as a method, a system, or a computer program product. Therefore, the embodiments of the present disclosure may use a form of hardware only embodiments, software only embodiments, or embodiments with a combination of software and hardware. Moreover, the embodiments of the present disclosure may use a form of a computer program product that is implemented on one or more computer-usable storage media (including but not limited to a magnetic disk memory, a CD-ROM, an optical memory, and the like) that include computer-usable program code. 
     It can be understood that those embodiments described in the embodiments of the present disclosure can be implemented by hardware, software, firmware, middleware, microcode, or a combination thereof. For implementation with hardware, the processing unit may be implemented in one or more application specific integrated circuits (ASIC), a digital signal processor (DSP), a digital signal processing device (DSP Device, DSPD), a programmable logic device (PLD), a field-programmable gate array (FPGA), a general-purpose processor, a controller, a microcontroller, a microprocessor, another electronic unit for implementing the functions of the present disclosure, or a combination thereof. 
     For implementation by software, technologies described in the embodiments of the present disclosure may be implemented by executing function modules (for example, a process and a function) in the embodiments of the present disclosure. Software codes can be stored in the memory and executed by the processor. The memory can be implemented inside or outside the processor. 
     The embodiments of the present disclosure are described with reference to the flowcharts and/or block diagrams of the method, the device (system), and the computer program product according to the embodiments of the present disclosure. It should be understood that computer program instructions may be used to implement each process and/or each block in the flowcharts and/or the block diagrams and a combination of a process and/or a block in the flowcharts and/or the block diagrams. Those computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or a processor of another programmable data processing device to generate a machine, so that an apparatus configured to implement functions specified in one or more procedures of a flowchart and/or one or more blocks of a block diagram is generated by using the instructions executed by the computer or the processor of the another programmable data processing device. 
     Those computer program instructions can also be stored in a computer readable memory that can guide a computer or another programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory generate a product including an instruction apparatus. The instruction apparatus implements functions specified in one or more procedures of a flowchart and/or one or more blocks of a block diagram. 
     Those computer program instructions can also be loaded into a computer or another programmable data processing device, so that a series of operation steps are executed on the computer or the another programmable device to generate processing implemented by the computer, and the instruction executed on the computer or the another programmable device provide steps of functions specified in one or more procedures of a flowchart and/or one or more blocks of a block diagram. 
     Obviously, a person skilled in the art can make various modifications and variations to the embodiments of the present disclosure without departing from the spirit and scope of the present disclosure. In this way, the present disclosure is intended to include these modifications and variations of the embodiments of the present disclosure provided that they fall within the scope of the claims of the present disclosure and their equivalent technologies.