New wireless low-power-consumption signal receiving method and terminal

Abstract

The invention provides a novel wireless low-power-consumption signal receiving method, which comprises the following steps that: a terminal wakes up before the paging opportunity arrives, executes pre-synchronization when judging that pre-synchronization needs to be executed, does not execute pre-synchronization if not, decides whether to receive a paging early indication according to network configuration, decides whether to attempt to receive a paging message according to the situation, and transmits the paging message to the terminal; and whether pre-synchronization needs to be executed before the next paging time is determined based on a predetermined decision strategy. According to the method, whether pre-synchronization needs to be carried out or not is selectively judged by using a strategy in advance, pre-synchronization is carried out if the pre-synchronization needs to be carried out, and pre-sync is not carried out before receiving of each PEI or paging, so that the power consumption of equipment is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of new wireless communication technology, and in particular to a new wireless low-power signal receiving method and terminal. Background Art

[0002] In the R15 version of the new wireless NR protocol, when the UE is in the IDLE or INACTIVE state, it monitors the paging signal belonging to the UE according to the paging period. Generally, the UE needs to wake up to receive the PSS / SSS signal or SSB signal before receiving the paging signal (paging message), and adjust the time-frequency deviation based on the time-frequency deviation estimated by such signals to make the residual time-frequency deviation as small as possible. This process is called pre-sync. Performing pre-sync before receiving the paging signal helps improve the performance of paging reception. In order to save power consumption, most of the existing implementation strategies are based on the paging period. For example, if the period is less than 320ms, then when the crystal oscillator performance is relatively good, it is believed that the time-frequency deviation will not change very much. It is only necessary to receive the SSB online to estimate the time-frequency deviation before receiving the paging.

[0003] The so-called online air interface signal is received and the digital signal is processed in real time, with relatively low power consumption. Corresponding to this is the offline reception method, where the air interface signal is received and converted into a digital signal and first stored in DDR or other types of storage units, and then the signal is processed later. Pre-sync generally requires the digital domain to try multiple time offsets and frequency offsets, and offline processing is used.

[0004] When receiving paging, the existing strategy is that if the time interval between the previous pre-sync and the current paging exceeds, for example, 100ms, and the crystal oscillator performance is not very good, the timing deviation may have a certain deviation. Currently, paging reception generally adopts offline reception and tries different time and frequency deviations for demodulation in the digital domain.

[0005] In the new wireless NR protocol R16 version, UE can support the reception of PEI. That is, the base station will indicate through PDCCH whether there is a paging signal for this UE in the next paging cycle. If not, the UE does not need to wake up to receive the paging signal in this paging cycle. The UE needs to periodically receive PEI to determine whether there is a paging signal belonging to this UE.

[0006] However, in the prior art, pre-sync is required before paging reception. The UE adjusts the time-frequency offset based on the time-frequency offset estimated by pre-sync, and then receives the PEI or paging signal. This can ensure reception performance, but each pre-sync consumes a lot of power.

[0007] In offline paging or PEI receiving mode, a relatively fixed number of time and frequency deviation attempts will be used. However, when the UE is in IDLE or INACTIVE state, it will wake up in advance at a fixed time to receive paging. However, the actual paging signal of this UE is very small, and using a fixed number of frequency deviation attempts will bring additional power consumption.

[0008] In addition, in offline mode, the time and frequency deviation is attempted. After the PDCCH or PDSCH is decoded successfully, the time deviation or frequency deviation is determined. Then, the granularity of the time deviation or frequency deviation attempt is relatively large. For example, 5 frequency deviation values ​​0Hz / +-1000Hz / +-2000Hz are attempted. The PDCCH is decoded correctly at 1000Hz, and the UE believes that the frequency deviation value at this time is 1000Hz. However, the actual frequency deviation value may be 600Hz at this time. After compensating for 1000Hz, the actual residual frequency deviation is still -400Hz. This will affect the subsequent signal reception performance. Summary of the invention

[0009] Based on the above content, the present invention provides a new wireless low-power signal receiving method and terminal, aiming to solve the technical problems of frequent pre-synchronization and high power consumption in the prior art.

[0010] A new wireless low-power signal receiving method, comprising:

[0011] Step A1: The terminal wakes up before the current paging opportunity arrives and determines whether pre-synchronization needs to be performed:

[0012] If yes, go to step A2;

[0013] If not, go to step A3;

[0014] Step A2, perform pre-synchronization, and then perform step A3;

[0015] Step A3: determine whether the network has configured early paging indication:

[0016] If yes, go to step A4;

[0017] If not, go to step A5;

[0018] Step A4, try to receive the early paging indication, and determine whether the early paging indication contains a paging message:

[0019] If yes, go to step A5;

[0020] If not, go to step A6;

[0021] Step A5, attempting to receive a paging message during a paging occasion, and then executing step A6;

[0022] Step A6: determine whether pre-synchronization needs to be performed before the next paging occasion based on a predetermined decision strategy.

[0023] Furthermore, the process of determining whether pre-synchronization needs to be performed in step A1 includes:

[0024] Step A11, judging whether to perform the first type of pre-synchronization according to a preset pre-synchronization execution period, the pre-synchronization execution period is N times the paging period, N is greater than 1:

[0025] If yes, continue to step A2;

[0026] If not, go to step A12;

[0027] Step A12, determining whether it is necessary to perform the second type of pre-synchronization before the current paging opportunity based on the preset synchronization decision strategy during the previous paging process:

[0028] If yes, go to step A2;

[0029] If not, go to step A3;

[0030] In step A2:

[0031] When the judgment result in step A11 is to perform the first type of pre-synchronization, the first type of pre-synchronization is performed;

[0032] When the result of the determination in step A12 is that the second type of pre-synchronization needs to be performed, the second type of pre-synchronization is performed;

[0033] In step A6, it is determined whether the second type of pre-synchronization needs to be performed before the next paging occasion based on the preset synchronization decision strategy.

[0034] Furthermore, in step A6, the preset synchronization decision strategy includes:

[0035] When the parameter values ​​of the predetermined parameter group estimated for the most recent M consecutive times do not meet the predetermined requirements, it is determined that the second type of pre-synchronization needs to be performed before the next paging opportunity, and M is greater than or equal to 1;

[0036] If there is an early paging indication, but the decoding of the early paging indication fails, the second type of pre-synchronization needs to be performed before determining the next paging opportunity;

[0037] The parameters of the predetermined parameter group include signal-to-noise ratio, time offset and frequency offset.

[0038] The predetermined requirements include: the signal-to-noise ratio is greater than a first threshold, the time deviation is not greater than a second threshold, and the frequency deviation is not greater than a third threshold.

[0039] Further, in step A2, when performing the first type of pre-synchronization and the second type of pre-synchronization, the parameter values ​​of the predetermined parameter group are estimated;

[0040] In step A4, when the paging early indication is decoded, a parameter value of a predetermined parameter group is estimated;

[0041] In step A5, when a paging message is decoded, parameter values ​​of a predetermined parameter group are estimated.

[0042] Furthermore, during the process from step A1 to step A3, the following steps are also performed:

[0043] Step B1, judging whether to perform signal quality measurement based on a preset measurement period:

[0044] If yes, go to step B2;

[0045] If not, end;

[0046] Step B2: perform signal quality measurement and estimate parameter values ​​of a predetermined parameter group.

[0047] Furthermore, each time the terminal estimates the parameter value of the predetermined parameter group, the following steps are also performed:

[0048] Step C1, determining whether the estimated signal-to-noise ratio of the predetermined parameter group is greater than a first threshold:

[0049] If yes, go to step C2;

[0050] If not, end;

[0051] Step C2, performing time-frequency offset adjustment, and updating the time-frequency offset adjustment time after the time-frequency offset adjustment is completed;

[0052] In step A4, a corresponding receiving mode is selected to receive the paging early indication through a preset receiving strategy;

[0053] In step A5, a corresponding receiving mode is selected to receive a paging message through a preset receiving strategy;

[0054] The process of selecting a corresponding receiving mode by using a preset receiving strategy includes:

[0055] Step D1, taking the start time of preparing to receive the paging-related information as the start time;

[0056] Step D2, calculating the difference between the start time and the time-frequency offset adjustment time as the time difference;

[0057] Step D3, determine whether the time difference is greater than the first time threshold:

[0058] If yes, go to step D4;

[0059] If not, proceed to step D5;

[0060] Step D4, receiving paging-related information using an offline receiving mode;

[0061] Step D5, receiving paging-related information using an online receiving mode;

[0062] Wherein, when receiving the paging early indication in step A4, the paging associated information is the paging early indication;

[0063] Wherein, when a paging message is received in step A5, the paging-related information is the paging message. Further, in step D4:

[0064] If the time difference is greater than the first time threshold and not greater than the second time threshold, the allowed number of attempts for time-frequency deviation is: TBin_num=Tbin_num_max and FBin_num=Fbin_num_max;

[0065] If the time difference is greater than the second time threshold and not greater than the third time threshold, the allowed number of attempts for the time-frequency offset is: TBin_num=Tbin_num_max-A1 and FBin_num=Fbin_num_max-B1;

[0066] If the time difference is greater than the third time threshold, the allowed number of attempts for time-frequency deviation is: TBin_num=Tbin_num_max-A1-A2, and FBin_num=Fbin_num_max-B1-B2;

[0067] Among them, TBin_num is the number of attempts allowed for time deviation, and FBin_num is the number of attempts allowed for frequency deviation;

[0068] Tbin_num_max is the maximum number of time offset attempts supported by the terminal;

[0069] Fbin_num_max is the maximum number of frequency deviation attempts supported by the terminal;

[0070] A1 is the first preset value; B1 is the second preset value;

[0071] A2 is the third preset value; B2 is the fourth preset value.

[0072] Further, in step D4, after receiving the paging-related information in the offline receiving mode, the process of estimating the time offset in the predetermined parameter group includes:

[0073] Step D41a, calculating the timing offset value based on the decoded paging-related information;

[0074] Step D41b: taking the sum of the timing offset value calculated in step D41a and the timing offset attempt value used when decoding the paging-related information as the final estimated timing offset value.

[0075] Further, in step D4, after receiving the paging-related information in the offline receiving mode, the process of estimating the frequency offset in the predetermined parameter group includes:

[0076] Step D42a, calculating the frequency offset value based on the decoded paging-related information;

[0077] Step D42b: The sum of the frequency offset value calculated in step D42a and the frequency offset attempt value used when decoding the paging-related information is used as the final estimated frequency offset value.

[0078] A terminal is used to execute the aforementioned new wireless low-power signal receiving method.

[0079] The beneficial technical effect of the present invention is that the present invention selectively determines whether pre-synchronization is required by using a strategy in advance, and performs pre-synchronization only if necessary, instead of performing pre-sync before each PEI or paging reception, thereby effectively reducing device power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Figure 1-7 A flowchart showing a novel wireless low-power signal receiving method of the present invention;

[0081] Figure 8 The timing diagram of the present invention is shown when PEI is configured on the network side;

[0082] Fig. 9 The timing diagram of the present invention is shown when the PEI is not configured on the network side. DETAILED DESCRIPTION

[0083] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0084] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0085] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0086] See also Figure 1 The present invention provides a new wireless low-power signal receiving method, comprising:

[0087] Step A1: The terminal wakes up before the current paging opportunity arrives and determines whether pre-synchronization needs to be performed:

[0088] If yes, go to step A2;

[0089] If not, go to step A3;

[0090] Step A2, perform pre-synchronization, and then perform step A3;

[0091] Step A3: determine whether the network has configured early paging indication:

[0092] If yes, go to step A4;

[0093] If not, go to step A5;

[0094] Step A4, try to receive the early paging indication, and determine whether the early paging indication contains a paging message:

[0095] If yes, go to step A5;

[0096] If not, go to step A6;

[0097] Step A5, attempting to receive a paging message during a paging occasion, and then executing step A6;

[0098] Step A6: determine whether pre-synchronization needs to be performed before the next paging occasion based on a predetermined decision strategy.

[0099] When receiving paging or PEI in IDLE or INACTIVE state, pre-sync is selectively performed through software strategy, instead of performing pre-sync before each PEI or paging reception, in order to reduce power consumption.

[0100] The present invention selectively determines whether pre-synchronization is required by using a strategy in advance, and performs pre-synchronization only if necessary, instead of performing pre-sync before each PEI or paging reception, thereby effectively reducing device power consumption.

[0101] See also Figure 2 Further, the process of determining whether pre-synchronization needs to be performed in step A1 includes:

[0102] Step A11, judging whether to perform the first type of pre-synchronization according to a preset pre-synchronization execution period, the pre-synchronization execution period is N times the paging period, N is greater than 1:

[0103] If yes, continue to step A2;

[0104] If not, go to step A12;

[0105] Step A12, determining whether it is necessary to perform the second type of pre-synchronization before the current paging opportunity based on the preset synchronization decision strategy during the previous paging process:

[0106] If yes, go to step A2;

[0107] If not, go to step A3;

[0108] In step A2:

[0109] When the judgment result in step A11 is to perform the first type of pre-synchronization, the first type of pre-synchronization is performed;

[0110] When the result of the determination in step A12 is that the second type of pre-synchronization needs to be performed, the second type of pre-synchronization is performed;

[0111] In step A6, it is determined whether the second type of pre-synchronization needs to be performed before the next paging occasion based on the preset synchronization decision strategy.

[0112] When the network side configures PEI, the execution of pre-synchronization is set before PEI reception.

[0113] Further, in step A4, after receiving the early paging indication, even if the early paging indication indicates the presence of a paging message, it is necessary to determine whether the second type of pre-synchronization needs to be performed before the next paging opportunity based on the preset synchronization decision strategy. Whether the second type of pre-synchronization is finally performed is subject to the decision in the last step A6.

[0114] After step A6, if the terminal has service processing, it enters the active state; if the terminal has no service processing, it enters the sleep state and waits until the next paging opportunity arrives before waking up, that is, after entering the sleep state, it returns to step A1.

[0115] The network configures the paging cycle (paging cycle) to T_paging, and sets the pre-sync cycle (pre-set pre-synchronization execution cycle) to N*T_paging. Where N>=1. That is to say, there is not necessarily a pre-sync before each paging cycle. Pre-sync must be performed every N paging cycles to ensure that the time-frequency deviation is as small as possible when the terminal has not received a paging message or an early paging indication for a long time, and to avoid affecting the measurement accuracy due to excessive time-frequency deviation. In order to make the description simple and clear, the pre-sync that must be performed is called the first type of pre-synchronization, and whether it is performed is determined by the paging cycle and the value of N. Selective pre-sync before paging / PEI reception is called the second type of pre-synchronization, and whether the second type of pre-synchronization needs to be performed depends on the preset synchronization decision strategy. For example, when initially entering the IDLE or INACTIVE state when there is no service, the paging number Paging_Count=0, and after the terminal wakes up, it determines whether the current Paging_Count is less than P (for example, if N is 4, P can be set to 4). If it is less than, then (Paging_Count-P) mod N is 0. If it is 0, it means that Paging_Count is 0 or 4, which is the first time in IDLE or INACTIVE state, and the first type of pre-synchronization is performed. If it is not 0, it means that Paging_Count is 1 or 2 or 3, and the complete pre-synchronization execution cycle has not been reached. Therefore, the first type of pre-synchronization is not performed, and it continues to determine whether the last paging process (the paging process includes the process of receiving the paging early indication and receiving the paging message within the paging opportunity)

[0116] After the terminal completes the paging process, it determines in step A6 whether to perform pre-synchronization next time, and then increases Paging_Count by 1. If there is no service processing, the terminal enters the sleep state, and if there is service processing, the terminal enters the active state.

[0117] Furthermore, in step A6, the preset synchronization decision strategy includes:

[0118] When the parameter values ​​of the predetermined parameter group estimated for the most recent M consecutive times do not meet the predetermined requirements, it is determined that the second type of pre-synchronization needs to be performed before the next paging opportunity, and M is greater than or equal to 1;

[0119] If there is an early paging indication, but the decoding of the early paging indication fails, the second type of pre-synchronization needs to be performed before determining the next paging opportunity;

[0120] The parameters of the predetermined parameter group include signal-to-noise ratio, time offset and frequency offset.

[0121] The predetermined requirements include: the signal-to-noise ratio is greater than a first threshold, the time deviation is not greater than a second threshold, and the frequency deviation is not greater than a third threshold.

[0122] For example, if the signal-to-noise ratio SNR estimated for M consecutive times is greater than the first threshold, and the time offset is not greater than the second threshold, and the frequency offset is not greater than the third threshold, it means that the signal-to-noise ratio, time offset and frequency offset for M consecutive times are all good, and there is no need to perform the second type of pre-synchronization before the next paging opportunity (there is PEI before PEI). For another example, if there is a signal-to-noise ratio SNR not greater than the first threshold, or the time offset is greater than the second threshold, or the frequency offset is greater than the third threshold for M consecutive estimates, it means that there is no need to perform the second type of pre-synchronization before the next paging opportunity (there is PEI before PEI).

[0123] In addition, if the paging early indication is configured and the decoding of the PDCCH (Physical Downlink Control Channel) corresponding to the paging early indication fails, pre-sync is required before the next paging or PEI is received.

[0124] Further, in step A2, when performing the first type of pre-synchronization and the second type of pre-synchronization, the parameter values ​​of the predetermined parameter group are estimated;

[0125] In step A4, when the paging early indication is decoded, a parameter value of a predetermined parameter group is estimated;

[0126] In step A5, when a paging message is decoded, parameter values ​​of a predetermined parameter group are estimated.

[0127] The estimation timing of signal-to-noise ratio, time offset and frequency offset can be:

[0128] When doing pre-synchronization, it is estimated based on the received PSS / SSS signal or SSB signal;

[0129] When the PDCCH channel carrying the early indication of paging is decoded, the signal-to-noise ratio, time offset and frequency offset are estimated based on the channel.

[0130] When decoding the PDCCH (carrying paging DCI) or PDSCH carrying the paging message, the signal-to-noise ratio, time offset and frequency offset are estimated based on this channel.

[0131] See also Figure 3 Furthermore, in the process from step A1 to step A3, the following steps are also performed:

[0132] Step B1, judging whether to perform signal quality measurement based on a preset measurement period:

[0133] If yes, go to step B2;

[0134] If not, end;

[0135] Step B2: perform signal quality measurement and estimate parameter values ​​of a predetermined parameter group.

[0136] In addition to estimating the signal-to-noise ratio, time offset, and frequency offset during presynchronization, PEI reception, and paging reception, the signal-to-noise ratio, time offset, and frequency offset are also estimated based on signal quality measurement results during the measurement period.

[0137] See also Figure 4 and Figure 5 , further, each time the terminal estimates the parameter value of the predetermined parameter group, it also executes:

[0138] Step C1, determining whether the estimated signal-to-noise ratio of the predetermined parameter group is greater than a first threshold:

[0139] If yes, go to step C2;

[0140] If not, end;

[0141] Step C2, performing time-frequency offset adjustment, and updating the time-frequency offset adjustment time after the time-frequency offset adjustment is completed;

[0142] In step A4, a corresponding receiving mode is selected to receive the paging early indication through a preset receiving strategy;

[0143] In step A5, a corresponding receiving mode is selected to receive a paging message through a preset receiving strategy;

[0144] The process of selecting a corresponding receiving mode by using a preset receiving strategy includes:

[0145] Step D1, taking the start time of preparing to receive the paging-related information as the start time;

[0146] Step D2, calculating the difference between the start time and the time-frequency offset adjustment time as the time difference;

[0147] Step D3, determine whether the time difference is greater than the first time threshold:

[0148] If yes, go to step D4;

[0149] If not, proceed to step D5;

[0150] Step D4, receiving paging-related information using an offline receiving mode;

[0151] Step D5, receiving paging-related information using an online receiving mode;

[0152] Wherein, when receiving the paging early indication in step A4, the paging associated information is the paging early indication;

[0153] When a paging message is received in step A5, the paging-related information is the paging message.

[0154] When performing signal quality measurement, pre-synchronization, PEI reception, and paging message reception, the signal-to-noise ratio, time offset, and frequency offset are estimated. If the signal-to-noise ratio is greater than the first threshold, it indicates that the signal-to-noise ratio is superior and the time offset and frequency offset estimation are reliable. Therefore, the time-frequency offset is adjusted according to the estimated time offset and frequency offset, and the time-frequency offset adjustment time is updated after the adjustment. The time-frequency offset adjustment time participates in the determination of the PEI or paging reception mode. The time-frequency offset is estimated by making full use of the downlink channel or the signal PEI, paging DCI, and paging PDSCHI. According to the time difference between the last time-frequency offset adjustment time and the time of the current PEI or paging signal to be received, the reception mode of the PEI, paging DCI signal is selected, which also achieves the purpose of saving power consumption.

[0155] Furthermore, in step D4:

[0156] If the time difference is greater than the first time threshold and not greater than the second time threshold, the allowed number of attempts for time-frequency deviation is: TBin_num=Tbin_num_max and FBin_num=Fbin_num_max;

[0157] If the time difference is greater than the second time threshold and not greater than the third time threshold, the allowed number of attempts for the time-frequency offset is: TBin_num=Tbin_num_max-A1 and FBin_num=Fbin_num_max-B1;

[0158] If the time difference is greater than the third time threshold, the allowed number of attempts for time-frequency deviation is: TBin_num=Tbin_num_max-A1-A2, and FBin_num=Fbin_num_max-B1-B2;

[0159] Among them, TBin_num is the number of attempts allowed for time deviation, and FBin_num is the number of attempts allowed for frequency deviation;

[0160] Tbin_num_max is the maximum number of time offset attempts supported by the terminal;

[0161] Fbin_num_max is the maximum number of frequency deviation attempts supported by the terminal;

[0162] A1 is the first preset value; B1 is the second preset value;

[0163] A2 is the third preset value; B2 is the fourth preset value.

[0164] In offline paging or PEI receiving mode, a strategy is used to dynamically adjust the number of frequency deviations during attempts to reduce power consumption.

[0165] See also Figure 6 Further, in step D4, after receiving the paging-related information using the offline receiving mode, the process of estimating the time offset in the predetermined parameter group includes:

[0166] Step D41a, calculating the timing offset value based on the decoded paging-related information;

[0167] Step D41b: taking the sum of the timing offset value calculated in step D41a and the timing offset attempt value used when decoding the paging-related information as the final estimated timing offset value.

[0168] For timing offset estimation, the timing offset attempt value when PDCCH or PDSCH is solved is t1, and the timing offset value estimated based on this signal is t2. Then the residual estimation value of the timing offset of the actual signal, that is, the final estimated timing offset value, is t=t1+t2. Figure 7 Further, in step D4, after receiving the paging-related information using the offline receiving mode, the process of estimating the frequency deviation in the predetermined parameter group includes:

[0169] Step D42a, calculating the frequency offset value based on the decoded paging-related information;

[0170] Step D42b: The sum of the frequency offset value calculated in step D42a and the frequency offset attempt value used when decoding the paging-related information is used as the final estimated frequency offset value.

[0171] For frequency offset estimation, the attempted frequency offset value when PDCCH or PDSCH is solved is f1, and the frequency offset value estimated based on this signal is f2. Then the residual frequency offset estimate of the actual signal, that is, the final estimated frequency offset value, is f=f1+f2.

[0172] After the paging attempts to solve the time-frequency offset to PDCCH or PDSCH, the present invention will also estimate a time-frequency offset value. For example, the residual frequency offset of the actual PDCCH signal is 600Hz, and the attempted frequency offset value of 1000Hz is solved correctly. The UE will also estimate a frequency offset estimate of about -400Hz based on the signal after compensating for 1000Hz. The final frequency offset value = 1000-400 = 600Hz. After the offline attempt to solve the time-frequency offset to PDCCH or PDSCH, another time-frequency offset value will be estimated based on the signal corresponding to the solved time-frequency offset value, and finally a value closer to the actual time-frequency offset is obtained, so that the residual time-frequency offset after compensating for the time-frequency offset is smaller, thereby improving subsequent reception performance.

[0173] Figure 8The timing diagram of the paging cycle when the network is configured with PEI is given. A1 indicates that the terminal wakes up in advance, A2, performs the first type of pre-synchronization, and there is a measurement cycle, so the signal quality measurement is also required. The pre-synchronization will estimate the signal-to-noise ratio, time offset and frequency offset based on the signal. If the signal-to-noise ratio is better than the threshold (that is, greater than the first threshold), the time offset and frequency offset are adjusted. After the adjustment, the time-frequency offset adjustment time is updated. The signal quality measurement also estimates the signal-to-noise ratio, time offset and frequency offset. If the signal-to-noise ratio is better than the threshold (that is, greater than the first threshold), the time offset and frequency offset are adjusted. After the adjustment, the time-frequency offset adjustment time is updated. A3, based on the time difference between the time-frequency offset adjustment time and the time to prepare to receive PEI, the receiving mode is determined, and PEI is received in the selected receiving mode. A4, estimate the signal-to-noise ratio, time offset and frequency offset according to the decoded channel. If the signal-to-noise ratio is better than the threshold (i.e., greater than the first threshold), adjust the time offset and frequency offset. After the adjustment, update the time and frequency offset adjustment time. It is determined that there is no need to perform the second type of pre-synchronization before the next paging opportunity PO. The received PEI does not indicate that there is a paging message for this PO. There is no business and enters the sleep time. A5, indicates that the terminal wakes up in advance. A6, there is no pre-synchronization execution cycle, and the first type of pre-synchronization is not performed. The last A4 did not indicate that the second type of pre-synchronization needs to be performed. Therefore, no pre-synchronization is performed before this paging opportunity. In the measurement cycle, perform signal quality measurement, estimate the signal-to-noise ratio, time offset and frequency offset. If the signal-to-noise ratio is better than the threshold (i.e., greater than the first threshold), adjust the time offset and frequency offset. After the adjustment, update the time and frequency offset adjustment time. A7, determine the receiving mode based on the time difference between the time and frequency offset adjustment time and the time to prepare to receive PEI, and receive PEI in the selected receiving mode. A8, estimate the signal-to-noise ratio, time offset and frequency offset according to the decoded channel. If the signal-to-noise ratio is better than the threshold (i.e., greater than the first threshold), adjust the time offset and frequency offset. After the adjustment, update the time-frequency offset adjustment time. If there is no indication of a paging message in the received PEI, it is determined that the second type of pre-synchronization needs to be performed before the next paging time PO, and enter the sleep time when there is no business. A9, indicates that the terminal wakes up in advance. A10, there is no pre-synchronization execution cycle, and the first type of pre-synchronization is not performed. The last A8 indicated that the second type of pre-synchronization needs to be performed, so the second type of pre-synchronization is performed. When the measurement cycle arrives, perform signal quality measurement. During pre-synchronization and measurement, determine whether to adjust the time-frequency offset according to the signal-to-noise ratio estimation result. If it is performed, update the time-frequency offset adjustment time after the time-frequency offset adjustment. A11, select the receiving mode to receive PEI according to the strategy. A12, estimate the signal-to-noise ratio and time-frequency offset according to the received PEI. If the signal-to-noise ratio is good, adjust the time-frequency offset, and then update the time-frequency offset adjustment time, and decide whether to perform pre-synchronization before the next PO. PEI indicates that there is a paging message.A13, try to receive paging message in PO, estimate signal-to-noise ratio and time-frequency offset, if the signal-to-noise ratio is good, adjust the time-frequency offset, then update the time-frequency offset adjustment time, and decide whether to perform pre-synchronization before the next PO. The decision on the second type of pre-synchronization after PEI and the decision on the second type of pre-synchronization after PO shall be based on the final PO decision. A14, the terminal wakes up, A15, signal quality measurement and signal-to-noise ratio, time-frequency offset estimation, and time-frequency offset adjustment when the signal-to-noise ratio is good. A16, the receiving strategy selects the receiving mode to receive PEI, A17, signal-to-noise ratio, time-frequency offset estimation, and time-frequency offset adjustment when the signal-to-noise ratio is good, and the next pre-synchronization execution decision. There is no paging message indication in PEI, so there is no need to enter PO this time, but to enter sleep without business. A18, the terminal wakes up early, A19, reaches the pre-synchronization execution period, performs pre-synchronization, and estimates the signal-to-noise ratio and time-frequency offset, as well as the time-frequency offset adjustment when the signal-to-noise ratio is good. And when the measurement period arrives, the signal quality measurement is performed, the signal-to-noise ratio and time-frequency offset are estimated, and the time-frequency offset is adjusted when the signal-to-noise ratio is good. A20, the receiving strategy selects the receiving mode to receive PE. A21, the signal-to-noise ratio, time-frequency offset estimation, and time-frequency offset adjustment when the signal-to-noise ratio is good, and the execution decision of the next pre-synchronization. There is no paging message indication in PEI, and there is no need to enter PO this time, but enter sleep without business.

[0174] Fig. 9The timing diagram of the paging cycle when the network is not configured with PEI is given. B1. The terminal wakes up in advance. B2. It is the turn of the pre-synchronization execution cycle. The first type of pre-synchronization is executed. It is the turn of the measurement cycle. The signal quality measurement is performed. Whether it is pre-synchronization execution or signal quality measurement, the signal-to-noise ratio and time-frequency offset are estimated. When the signal-to-noise ratio is good, the time-frequency offset is adjusted and the time-frequency offset adjustment time is updated. B3. The paging message reception mode is determined according to the time-frequency offset adjustment time. Try to receive the paging message within the paging opportunity PO. The signal-to-noise ratio and time-frequency offset are estimated. When the signal-to-noise ratio is good, the time-frequency offset is adjusted and the time-frequency offset adjustment time is updated. It is decided to perform the second type of pre-synchronization before the next paging, and enter the sleep state without business. B4. The terminal is new. B5. Perform the second type of pre-synchronization, estimate the signal-to-noise ratio and time-frequency offset, and adjust the time-frequency offset when the signal-to-noise ratio is good, and update the time-frequency offset adjustment time. B6. Determine the paging message receiving mode according to the time-frequency offset adjustment time, try to receive the paging message within the paging opportunity PO, estimate the signal-to-noise ratio and time-frequency offset, adjust the time-frequency offset and update the time-frequency offset adjustment time when the signal-to-noise ratio is good, and decide that there is no need to perform the second type of pre-synchronization before the next paging, and enter the sleep state without any business. B7. The terminal is new. B8. No need to perform pre-synchronization, perform signal quality measurement, estimate the signal-to-noise ratio and time-frequency offset, adjust the time-frequency offset and update the time-frequency offset adjustment time when the signal-to-noise ratio is good. B9. Determine the paging message receiving mode according to the time-frequency offset adjustment time, try to receive the paging message within the paging opportunity PO, estimate the signal-to-noise ratio and time-frequency offset, adjust the time-frequency offset and update the time-frequency offset adjustment time when the signal-to-noise ratio is good, and decide that there is no need to perform the second type of pre-synchronization before the next paging, and enter the sleep state without any business. B10. The terminal wakes up early. B11, determine the paging message receiving mode according to the time-frequency offset adjustment time, try to receive the paging message within the paging opportunity PO, estimate the signal-to-noise ratio and time-frequency offset, adjust the time-frequency offset when the signal-to-noise ratio is good and update the time-frequency offset adjustment time, decide that there is no need to perform the second type of pre-synchronization before the next paging, and enter the sleep state without business. B12, the terminal wakes up. B13, it is the turn of the pre-synchronization execution cycle, perform the first type of pre-synchronization, and the turn of the measurement cycle, perform signal quality measurement, the same as B2.

[0175] The present invention also provides a terminal, characterized in that it is used to execute the aforementioned new wireless low-power signal receiving method.

[0176] The terminal of the present invention may be a user device, a mobile phone, a tablet computer, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (PDA), a mobile Internet device (MID), a wearable device or a vehicle-mounted device, etc. The network-side equipment includes but is not limited to base stations in communication systems such as 4G base stations, 5G base stations, and 6G base stations.

[0177] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A new wireless low-power signal receiving method, characterized in that: include: Step A1: The terminal wakes up before the current paging opportunity arrives and determines whether pre-synchronization needs to be performed: If yes, go to step A2; If not, go to step A3; Step A2, performing the pre-synchronization, and then performing the step A3; Step A3: determine whether the network has configured early paging indication: If yes, go to step A4; If not, go to step A5; Step A4, attempting to receive the paging early indication, and determining whether the paging early indication contains a paging message: If yes, go to step A5; If not, go to step A6; Step A5, attempting to receive a paging message in the paging occasion, and then executing step A6; Step A6: determine whether pre-synchronization needs to be performed before the next paging occasion based on a predetermined decision strategy.

2. A new wireless low-power signal receiving method as claimed in claim 1, characterized in that: The process of determining whether pre-synchronization needs to be performed in step A1 includes: Step A11, judging whether to perform the first type of pre-synchronization according to a preset pre-synchronization execution period, wherein the pre-synchronization execution period is N times the paging period, where N is greater than 1: If yes, continue with step A2; If not, go to step A12; Step A12, determining whether the preset synchronization decision strategy in the previous paging process determines that the second type of pre-synchronization needs to be performed before the current paging opportunity: If yes, go to step A2; If not, execute step A3; In step A2: When the judgment result in the step A11 is to execute the first type of pre-synchronization, the first type of pre-synchronization is executed; When the result of the determination in step A12 is that the second type of pre-synchronization needs to be performed, performing the second type of pre-synchronization; In the step A6, whether the second type of pre-synchronization needs to be performed before the next paging occasion is determined based on the preset synchronization decision strategy.

3. A new wireless low-power signal receiving method as claimed in claim 2, characterized in that: In the step A6, the preset synchronization decision strategy includes: When the parameter values ​​of the predetermined parameter group estimated for the most recent M consecutive times do not meet the predetermined requirements, it is determined that the second type of pre-synchronization needs to be performed before the next paging opportunity, where M is greater than or equal to 1; If there is an early paging indication, but the decoding of the early paging indication fails, it is necessary to perform the second type of pre-synchronization before determining the next paging opportunity; The parameters of the predetermined parameter group include signal-to-noise ratio, time offset and frequency offset. The predetermined requirements include: the signal-to-noise ratio is greater than a first threshold, the time deviation is not greater than a second threshold, and the frequency deviation is not greater than a third threshold.

4. A new wireless low-power signal receiving method as claimed in claim 3, characterized in that: In the step A2, when performing the first type of pre-synchronization and the second type of pre-synchronization, the parameter values ​​of the predetermined parameter group are estimated; In the step A4, when the paging early indication is decoded, the parameter value of the predetermined parameter group is estimated; In the step A5, when the paging message is decoded, the parameter values ​​of the predetermined parameter group are estimated.

5. A new wireless low-power signal receiving method as claimed in claim 4, characterized in that: In the process from step A1 to step A3, the following steps are further performed: Step B1, judging whether to perform signal quality measurement based on a preset measurement period: If yes, go to step B2; If not, end; Step B2: perform signal quality measurement and estimate parameter values ​​of the predetermined parameter group.

6. A new wireless low-power signal receiving method as claimed in claim 3, characterized in that: Whenever the terminal estimates the parameter value of the predetermined parameter group, the terminal further executes: Step C1, determining whether the estimated signal-to-noise ratio of the predetermined parameter group is greater than the first threshold: If yes, go to step C2; If not, end; Step C2, performing time-frequency offset adjustment, and updating the time-frequency offset adjustment time after the time-frequency offset adjustment is completed; In the step A4, a corresponding receiving mode is selected by a preset receiving strategy to receive the paging early indication; In the step A5, a corresponding receiving mode is selected through the preset receiving strategy to receive the paging message; The process of selecting a corresponding receiving mode by using the preset receiving strategy includes: Step D1, taking the start time of preparing to receive the paging-related information as the start time; Step D2, calculating the difference between the start time and the time-frequency offset adjustment time as a time difference; Step D3, determining whether the time difference is greater than a first time threshold: If yes, go to step D4; If not, proceed to step D5; Step D4, receiving the paging-related information using an offline receiving mode; Step D5, receiving the paging-related information using an online receiving mode; Wherein, when the paging early indication is received in the step A4, the paging associated information is the paging early indication; Wherein, when the paging message is received in the step A5, the paging-related information is the paging message.

7. A new wireless low-power signal receiving method as claimed in claim 6, characterized in that: In step D4: If the time difference is greater than the first time threshold and not greater than the second time threshold, the allowed number of attempts for time-frequency offset is: TBin_num=Tbin_num_max and FBin_num=Fbin_num_max; If the time difference is greater than the second time threshold and not greater than the third time threshold, the allowed number of attempts for time-frequency deviation is: TBin_num=Tbin_num_max-A1 and FBin_num=Fbin_num_max-B1; If the time difference is greater than the third time threshold, the allowed number of attempts for time-frequency deviation is: TBin_num=Tbin_num_max-A1-A2, and FBin_num=Fbin_num_max-B1-B2; Among them, TBin_num is the number of attempts allowed for time deviation, and FBin_num is the number of attempts allowed for frequency deviation; Tbin_num_max is the maximum number of time offset attempts supported by the terminal; Fbin_num_max is the maximum number of frequency deviation attempts supported by the terminal; A1 is the first preset value; B1 is the second preset value; A2 is the third preset value; B2 is the fourth preset value.

8. A new wireless low-power signal receiving method as claimed in claim 6, characterized in that: In the step D4, after the paging-related information is received in the offline receiving mode, the process of estimating the time offset in the predetermined parameter group includes: Step D41a, calculating a timing offset value based on the decoded paging-related information; Step D41b: taking the sum of the timing offset value calculated in step D41a and the timing offset attempt value used when decoding the paging-related information as the final estimated timing offset value.

9. A new wireless low-power signal receiving method as claimed in claim 6, characterized in that: In the step D4, after the paging-related information is received in the offline receiving mode, the process of estimating the frequency offset in the predetermined parameter group includes: Step D42a, calculating a frequency deviation value based on the decoded paging-related information; Step D42b: taking the sum of the frequency offset value calculated in step D42a and the frequency offset attempt value used when decoding the paging-related information as the final estimated frequency offset value.

10. A terminal, characterized in that: Used to execute a new wireless low-power signal receiving method as described in any one of claims 1-9.

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