CN112956244A

CN112956244A - Power consumption control method of terminal and related equipment

Info

Publication number: CN112956244A
Application number: CN201880099022.4A
Authority: CN
Inventors: 魏璟鑫
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-10-26
Filing date: 2018-10-26
Publication date: 2021-06-11
Anticipated expiration: 2038-10-26
Also published as: CN112956244B; WO2020082371A1

Abstract

The embodiment of the invention discloses a power consumption control method of a terminal and related equipment, wherein the method comprises the following steps: configuring an analog-to-digital conversion (AD) sampling rate of a first downlink signal of a first cell received by the terminal as a first initial sampling rate; the first cell is a service cell of the terminal, or the first cell is one or more adjacent cells of the terminal at a designated frequency point; when the first measurement of the first cell signal of the terminal is superior to a first measurement threshold, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a first sampling rate; wherein the value of the first sampling rate is less than the value of the first initial sampling rate. The embodiment of the invention can reduce the power consumption of the terminal in the standby state.

Description

Power consumption control method of terminal and related equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a power consumption control method for a terminal and a related device.

Background

In a wireless network, when data needs to be transmitted, a User Equipment (UE) always monitors a Physical Downlink Control Channel (PDCCH) and transmits and receives the data according to an indication message sent by a network side, which results in large power consumption of the UE and large time delay of data transmission. Therefore, the 3GPP standard protocol introduces a Discontinuous Reception (DRX) power saving policy in the LTE system, which defines Media Access Control (MAC) in the physical layer. DRX refers to discontinuous reception by a terminal, i.e., the terminal can periodically stop monitoring a PDCCH channel for a period of time, thereby saving power.

According to the working state of DRX, the method is divided into IDLE state IDLE DRX and connected state ACTIVE DRX.

1. IDLE DRX, that is, when a terminal (for example, UE) is in a discontinuous reception state, because the terminal is in an RRC _ IDLE state (the UE is initially powered on or stays in an IDLE mode after being powered on), there is no Radio Resource Control (RRC) connection and no dedicated Resource of a user, the IDLE DRX mainly monitors a paging channel and a broadcast channel, and as long as a fixed period is defined, the discontinuous reception may be achieved. It can be understood that, if the UE wants to monitor the user data channel, the UE must enter the connected state from the IDLE state first, i.e. must perform downlink synchronization first.

2. ACTIVE DRX, that is, DRX in which the UE is in an RRC-connected (RRC-connected) state, may optimize system resource configuration, and since the RRC connection exists in the ACTIVE DRX state, a speed for the UE to transition to a state of monitoring downlink data is very fast, thereby saving power consumption of the UE. For example, some non-real-time applications, web browsing, instant messaging, and the like. The UE does not need to monitor downlink data and relevant processing continuously in a period of time, namely the UE is in the network, but can not carry out normal scheduling and is in a deactivated state or in an out-of-gait state. Since the RRC connection still exists in this state, the UE can transition to the non-DRX state very quickly. For example, of the four states of UE connected mode, CELL-PCH (paging channel), URA-PCH (paging channel), CELL-FACH (forward access channel) and CELL-DCH (dedicated channel), CELL-PCH, URA-PCH belong to the ACTIVE DRX state mentioned above.

In the above two DRX operation states, although the power consumption of the UE is greatly saved. However, if the UE wants to enter the non-DRX state, it still needs to periodically monitor the related signals for downlink synchronization in the DRX state to establish downlink synchronization with the base station, and this monitoring process also causes the UE to consume more power. Therefore, how to further reduce the power consumption of the terminal in the DRX state is an urgent problem to be solved.

Disclosure of Invention

The technical problem to be solved by the embodiments of the present invention is to provide a power consumption control method of a terminal and a related device, so as to solve the problem in the prior art that in some communication scenarios, the standby power consumption of the terminal is large due to an excessively large sampling rate of the terminal.

In a first aspect, an embodiment of the present invention provides a method for controlling power consumption of a terminal, where the method may include:

configuring an analog-to-digital conversion (AD) sampling rate of a first downlink signal of a first cell received by the terminal as a first initial sampling rate; the first cell is a service cell of the terminal, or the first cell is one or more adjacent cells of the terminal at a designated frequency point; when the first measurement of the first cell signal of the terminal is superior to a first measurement threshold, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a first sampling rate; wherein the value of the first sampling rate is less than the value of the first initial sampling rate.

According to the embodiment of the invention, the quality of the signal of the service cell or the adjacent cell of the terminal is monitored, and the first downlink signal of the corresponding cell is received by using a lower sampling rate under the condition that the signal quality is better estimated, so that the quality of the downlink signal received by the terminal can be ensured, the standby power consumption of the terminal can be reduced, and the user experience is improved.

In one possible implementation, the exceeding, by the first metric, the first metric threshold for the first cell signal of the terminal includes: when the terminal is in a Discontinuous Reception (DRX) state, in M DRX periods in a first time period, the measurement of one or more of the signal to interference plus noise ratio (SINR), the Reference Signal Received Power (RSRP) and the Reference Signal Received Quality (RSRQ) of the first cell signal is better than a corresponding first measurement threshold, wherein M is an integer greater than or equal to 1.

According to the embodiment of the invention, the signal quality of the service cell accessed by the terminal is monitored when the terminal is in the DRX state, and the downlink signal is received by using a lower sampling rate under the condition that the signal quality is better, so that the quality of the downlink signal received by the terminal can be ensured, the standby power consumption in the DRX state can be reduced, and the user experience is improved.

In a possible implementation manner, when the first cell is a plurality of adjacent cells of the terminal at a designated frequency point; the first cell signal is a plurality of adjacent cell signals; the metric of one or more of SINR, RSRP, and RSRQ of the first cell signal is better than the corresponding first metric threshold in M DRX cycles in the first time period, including: the metric of one or more of SINR, RSRP and RSRQ of all neighboring cell signals of the plurality of neighboring cell signals is better than the corresponding first metric threshold for M DRX cycles in the first time period.

According to the embodiment of the invention, when the terminal is in the DRX state, the signal quality of a plurality of adjacent cells of the terminal at the designated frequency point is monitored in real time, and when the signal quality of all the adjacent cells is evaluated to be good, the downlink signal is received by using a lower sampling rate, such as the downlink synchronization signal or the related signal for downlink synchronization, and the like, so that the standby power consumption in the DRX state can be reduced as much as possible on the premise of ensuring the quality of the downlink signal received by the terminal, and the user experience is improved.

In one possible implementation, the method further includes: when the second metric of the first cell signal of the terminal is lower than a second metric threshold, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a second sampling rate; and the value of the second sampling rate is greater than or equal to the first initial sampling rate.

According to the embodiment of the invention, the signal quality of the service cell or the adjacent cell of the terminal is monitored, the downlink signal is received by using a lower sampling rate under the condition that the signal quality is better estimated, and further, the downlink signal is received by using a higher sampling rate under the condition that the signal quality is poorer estimated, namely, the standby power consumption of the terminal can be reduced as much as possible under the condition that the quality of the downlink signal received by the terminal is ensured no matter the signal quality of the service cell is good or poor, and the user experience is improved.

In one possible implementation, the second metric being worse than the second metric threshold for the first cell signal of the terminal includes that, when the terminal is in the DRX state, a metric of one or more of SINR, RSRP, and RSRQ of the first cell signal is worse than the corresponding second metric threshold for N DRX cycles in the second time period, where N is an integer greater than or equal to 1.

According to the embodiment of the invention, when the terminal is in the DRX state, the signal quality of the service cell or the adjacent cell of the terminal is monitored in real time, and the downlink signal is received by using a lower sampling rate under the condition that the signal quality is evaluated to be better, and further, the downlink signal is received by using a higher sampling rate under the condition that the signal quality is evaluated to be poorer, namely, under the condition that the signal quality of the service cell is good or poor, the standby power consumption in the DRX state can be reduced as much as possible on the premise that the quality of the downlink signal received by the terminal is ensured, and the user experience is improved.

In a possible implementation manner, when the first cell is a plurality of adjacent cells of the terminal at a designated frequency point; the first cell signal is a plurality of adjacent cell signals; the metric of one or more of SINR, RSRP, and RSRQ of the first cell signal over N DRX cycles in the second time period is inferior to a corresponding second metric threshold, comprising: the metric of one or more of SINR, RSRP, and RSRQ of any one of the plurality of neighboring cell signals is inferior to a corresponding second metric threshold for N DRX cycles in a second time period.

In the embodiment of the invention, when the terminal is in the DRX state, the signal quality of a plurality of adjacent cells of the terminal at a specified frequency point is monitored in real time, and when the signal quality of all the adjacent cells is evaluated to be good, a downlink signal is received by using a smaller sampling rate, such as a downlink synchronization signal or a related signal for downlink synchronization, and the like.

In one possible implementation manner, the first downlink signal is a synchronization signal block SSB or a cell reference signal CRS.

The embodiments of the present invention may be applied to different communication systems, for example, the first downlink signal may be a synchronization signal block SSB in a new air interface NR system, or may be a cell reference signal CRS in a long term evolution LTE system.

In one possible implementation, the first cell signal is the first downlink signal of the first cell.

According to the embodiment of the invention, the quality of the signal of the first cell can be judged by judging whether the first metric of the signal of the first cell is superior to the first metric threshold or not. Alternatively, it may also be determined whether the first metric of the other related signals of the first cell is better than the first metric threshold.

In one possible implementation, M is greater than N. Optionally, M is an integer greater than 1, and N is equal to 1.

In the embodiment of the invention, when the signal quality of the service cell is evaluated to be better, the signal quality can be determined based on the relevant parameters measured in a plurality of DRX periods, so that the situation that the sampling rate is adjusted to be smaller by mistake due to the fact that the first measurement is superior to the first measurement threshold temporarily or accidentally is avoided, and the quality of the sampled signal cannot be ensured; however, when evaluating whether the signal quality of the serving cell is poor, the determination may be performed only based on the relevant parameters measured in one DRX cycle, so as to avoid the risk that the downlink time-frequency synchronization cannot be completed due to the fact that the signal quality is possibly poor and the sampling rate is not adjusted up in time as far as possible.

In a second aspect, an embodiment of the present invention provides a terminal, which may include:

the terminal comprises a processing unit, a first cell and a second cell, wherein the processing unit is used for configuring the analog-to-digital conversion (AD) sampling rate of a first downlink signal of the first cell received by the terminal as a first initial sampling rate; the first cell is a service cell of the terminal, or the first cell is one or more adjacent cells of the terminal at a designated frequency point;

the processing unit is further configured to configure an AD sampling rate at which the terminal receives the first downlink signal as a first sampling rate when a first metric of a first cell signal of the terminal is better than a first metric threshold;

wherein the value of the first sampling rate is less than the value of the first initial sampling rate.

In a possible implementation manner, the processing unit is specifically configured to:

when the terminal is in a Discontinuous Reception (DRX) state and in M DRX periods in a first time period, when the measurement of one or more of the signal to interference plus noise ratio (SINR), the Reference Signal Received Power (RSRP) and the Reference Signal Received Quality (RSRQ) of the first cell signal is better than a corresponding first measurement threshold, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a first sampling rate; wherein M is an integer greater than or equal to 1.

In a possible implementation manner, when the first cell is a plurality of adjacent cells of the terminal at a designated frequency point; the first cell signal is a plurality of adjacent cell signals; the processing unit is specifically configured to:

and when the terminal is in a DRX state and in M DRX periods in a first time period, and when the metric of one or more of SINR, RSRP and RSRQ of all the adjacent cell signals in the adjacent cell signals is better than a corresponding first metric threshold, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a first sampling rate.

In one possible implementation, the processing unit is further configured to:

when the second metric of the first cell signal of the terminal is lower than a second metric threshold, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a second sampling rate; and the value of the second sampling rate is greater than or equal to the first initial sampling rate.

when the terminal is in a DRX state and in N DRX periods in a second time period, when the metric of one or more of SINR, RSRP and RSRQ of the first cell signal is inferior to a corresponding second metric threshold, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a second sampling rate; wherein N is an integer greater than or equal to 1.

and when the terminal is in a DRX state and the measurement of one or more of SINR, RSRP and RSRQ of any one of the plurality of adjacent cell signals is inferior to a corresponding second measurement threshold in N DRX periods in a second time period, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a second sampling rate.

In a possible implementation manner, when a first cell signal of the terminal does not satisfy that neither a first metric is better than a first metric threshold nor a second metric is worse than a second metric threshold, the terminal is controlled to maintain a current sampling rate to receive the first downlink signal of the first cell.

In the embodiment of the present invention, when M and N are not equal to 1 at the same time, that is, when at least one of M and N is greater than 1, there may be a case where neither the first metric better than the first metric threshold nor the second metric worse than the second metric threshold is satisfied. At this time, the terminal may keep the last sample rate configuration result unchanged, and perform sample rate reconfiguration until the first metric is better than the first metric threshold or the second metric is worse than the second metric threshold.

In a third aspect, the present application provides a terminal having a function of implementing the method in any one of the above embodiments of the power consumption control method for a terminal. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a fourth aspect, the present application provides a terminal, where the terminal includes a processor, and the processor is configured to support the terminal to execute a corresponding function in the power consumption control method for controlling the terminal provided in the first aspect. The terminal may also include a memory, coupled to the processor, that retains program instructions and data necessary for the terminal. The terminal may also include a communication interface for the terminal to communicate with other devices or communication networks.

In a fifth aspect, the present application provides a computer storage medium for storing computer software instructions for a terminal provided in the third aspect, which contains a program designed to execute the above aspects.

In a sixth aspect, an embodiment of the present invention provides a computer program, where the computer program includes instructions, and when the computer program is executed by a computer, the computer may execute the flow in the power consumption control method of the terminal in any one of the first aspect.

In a seventh aspect, the present application provides a chip system, where the chip system includes a processor, configured to enable a terminal to implement the functions referred to in the first aspect, for example, to generate or process information referred to in the sampling adjustment method. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the terminal. The chip system may be formed by a chip, or may include a chip and other discrete devices.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.

FIG. 1 is a schematic structural diagram of an SS burst set provided by an embodiment of the present invention;

FIG. 2 is a diagram of a sample rate control network architecture according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating a power consumption control method for a terminal according to an embodiment of the present invention;

fig. 4 is a diagram illustrating a DRX cycle according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating a sampling rate control of a serving cell and neighboring cells according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a sample rate control according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of another sample rate control provided by an embodiment of the present invention;

FIG. 8 is a schematic diagram of another sample rate control provided by an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of another terminal according to an embodiment of the present invention.

Detailed Description

Hereinafter, some terms in the present application are explained to facilitate understanding by those skilled in the art.

(1) Resource Block (RB): 12 subcarriers are contiguous in frequency, one slot in time domain, referred to as 1 RB.

(2) Resource Element/Resource Element (RE): one subcarrier in frequency and one symbol in time domain (symbol), called one RE.

(3) Orthogonal Frequency Division Multiplexing (OFDM) is a kind of multi-carrier modulation, and because of its high Frequency band utilization rate and strong anti-multipath capability, it can effectively suppress intersymbol interference and interchannel interference, and is especially suitable for wireless high-speed communication. The OFDM system adopts a plurality of orthogonal subcarriers, the frequency spectrum values of all the rest subchannels are just zero at the position of the maximum frequency spectrum value of each subcarrier, and the output signal is the superposition of the plurality of orthogonal subcarriers.

(4) Subcarrier: both LTE and NR employ OFDM technology. OFDM is that each Symbol corresponds to an orthogonal subcarrier, and interference is countered by orthogonality between carriers. The protocol specifies that the subcarrier spacing is 15khz in the normal case, and that in the case of a normal cyclic prefix cp (cyclic prefix), there are 7 symbols per slot of each subcarrier; in the extended CP case, there are 6 symbols per slot of a subcarrier.

(5) And (3) CP: chinese is translated as a cyclic prefix that contains the repetition of the tail of the OFDM symbol, and CP is mainly used to combat multipath interference in real environments. Without the CP, the delay spread due to multipath affects the orthogonality between subcarriers, resulting in intersymbol interference.

(6) Physical Broadcast Channel (PBCH): the PBCH provides basic system information to the UE, which decodes the information on the PBCH in order to access the cell. For example, the PBCH may provide information including: downlink system bandwidth, timing information within radio frames, periodicity of synchronization signal pulse transmission, system frame number.

(7) Bandwidth: bandwidth, also called bandwidth, in an analog signal system refers to the amount of data that can be transmitted over a fixed period of time, i.e., the ability to transmit data over a transmission pipeline. Typically expressed in terms of transmission cycles per second or hertz (Hz).

(8) Fast Fourier Transform (FFT), is a Fast algorithm for Discrete Fourier Transform (DFT). It is obtained by improving the algorithm of discrete Fourier transform according to the characteristics of odd, even, imaginary and real of the discrete Fourier transform. The more the sampling points, the higher the FFT calculation precision, but the increased calculation amount, so to choose the proper sampling points, when the sampling points equal to the power of 2, the fast Fourier transform method can be used, greatly increasing the operation speed, so generally set the sampling points to the power of 2, when the actual sampling number is not enough, automatically fill up with 0. Inverse Fast Fourier transform, IFFT) is the Inverse of the FFT. The IFFT and FFT can implement modulation (ensuring mutual orthogonality among subcarriers of the output OFDM signal) and demodulation of the OFDM signal in the digital domain.

(9) A Finite Impulse Response (FIR) filter, also called a non-recursive filter, is the most basic element in a digital signal processing system, and it can guarantee an arbitrary amplitude-frequency characteristic while having a strict linear phase-frequency characteristic, and its unit sampling Response is Finite, so that the filter is a stable system.

(10) Signal to Interference plus Noise Ratio (SINR), which is the Ratio of the received strength of a useful Signal to the received strength of an interfering Signal (Noise and Interference); this can be simply understood as "signal-to-noise ratio".

(11) Reference Signal Received Power (RSRP) is the average of the received Signal Power over all Resource Elements (REs) that carry the Reference Signal (Reference Signal) within a Symbol (Symbol).

(12) The Received Signal Strength Indicator (RSSI) is an average value of powers of all signals (including pilot signals and data signals, adjacent cell interference signals, noise signals, etc.) Received in the Symbol, and is an optional part of an infinite transmission layer, and is used for judging the quality of a link and increasing the broadcast transmission Strength.

(13) Reference Signal Receiving Quality (RSRQ) is the ratio of RSRP to RSSI, and can be adjusted by a correlation coefficient, i.e., RSRQ — N × RSRP/RSS, because the bandwidths on which the two measurements are based may be different.

(14) The Radio Resource Management (RRM) aims to provide quality of service (qos) for wireless ues in a network under a condition of limited bandwidth, and basically starts to flexibly allocate and dynamically adjust available resources of a wireless transmission portion and the network under the conditions of uneven traffic distribution of the network, fluctuating channel characteristics due to channel attenuation and interference, and the like, thereby improving the utilization rate of a wireless spectrum to the maximum extent, preventing network congestion, and maintaining signaling load as small as possible. The research content of Radio Resource Management (RRM) mainly includes the following parts: power control, channel allocation, scheduling, handover, access control, load control, end-to-end QoS and adaptive code modulation, etc.

(15) Sampling (sampling), the time value of the digital signal is discrete finite length, since the time value of the analog signal is continuous infinite length. If analog signals are to be digitized by a computer or a computer chip, the analog signals must be converted into discrete finite-length signals that can be recognized by the computer. Generally, sampling is a process from a continuous signal to a discrete signal, and is a discretization of the signal in time, that is, instantaneous values of the signal are collected point by point on an analog signal x (t) at a certain time interval Δ t, which is a precondition for digital signal processing.

(16) The sampling rate, i.e. the sampling time interval, also called sampling speed or sampling rate, defines the number of samples per second that are extracted from a continuous signal and constitute a discrete signal, which is expressed in hertz (Hz). The inverse of the sampling frequency is the sampling period or sampling time, which is the time interval between samples. Colloquially speaking, the sampling frequency refers to how many signal samples per second a computer takes. The sampling rate is the frequency of signal conversion (i.e. the number of times of acquisition per second) when the analog quantity is converted into the digital quantity, the higher the frequency is, the more the signal is acquired in unit time, the more the information in the signal is retained, the less the information is lost, and the converted digital quantity can accurately reflect the value of the signal.

(17) The sampling theorem, also known as shannon sampling theorem and nyquist sampling theorem, is an important basic conclusion in information theory, especially in communication and signal processing disciplines. According to the nyquist sampling law, the sampling frequency must be greater than twice the bandwidth of the signal to be sampled in order to avoid frequency aliasing, in other words the sampling frequency must be at least twice the frequency of the largest frequency component in the signal to be sampled, otherwise the original signal cannot be recovered from the signal sample. For example, if the bandwidth of the signal is 100Hz, the sampling frequency must be greater than 200Hz in order to avoid aliasing.

In a communication system, when a terminal (e.g., UE) is in a Discontinuous Reception (DRX) state, if it wants to enter a non-DRX state, it needs to establish downlink synchronization with a base station first. After establishing downlink synchronization, the UE may receive broadcast information sent by the base station to obtain various configuration parameters of the base station. If the UE has data to send to the base station, the UE initiates a Random Access (RACH) process to establish uplink synchronization with the base station.

In the nr (new radio) system, in order to improve the coverage of network devices and ensure that a terminal can quickly obtain synchronization signals, system information, and the like required by an access network, the information needs to be periodically broadcast. In NR, a Synchronization Signal block (SS block or SSB) contains Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSs) and Physical Broadcast Channel (PBCH), and the SS block may occupy multiple Orthogonal Frequency Division Multiplexing (OFDM) symbols, which are associated with carrier Frequency band and subcarrier spacing, and the UE may complete downlink Synchronization with the serving cell by receiving the periodically Broadcast SS block.

As shown in fig. 1, fig. 1 is a schematic structural diagram of an SS burst set provided by the present application, wherein in an NR system, each SSB occupies 4 OFDM symbols (OFDM symbols), and is composed of a synchronization signal (PSS/SSs) and a PBCH. The sub-carrier spacing (SCS) of the SSB symbols may take the values 15KHz, 30KHz, 120KHz, 240KHz, where 15KHz, 30KHz are used for the frequency bands below 6GHz, and 120KHz, 240KHz are used for the frequency bands above 6 GHz. In NR SSB, a symbol where a synchronization signal (PSS/SSS) is located occupies 12 RBs (each RB comprises 12 subcarriers), and the total number of the subcarriers is 144; the PBCH symbol occupies 20 RBs for a total of 240 subcarriers. There are 4 RBs PBCH on both sides of the SSS symbol.

It should be noted that, due to the characteristic of introducing a Bandwidth Part (BWP) into NR, the operating Bandwidth of the UE is flexible and variable, and the UE does not need to support all system bandwidths and only needs to meet the minimum Bandwidth requirement, so as to support the UE with narrow Bandwidth capability or save the power consumption of the UE. For example, at the first moment, the traffic of the UE is large, and the system configures a large bandwidth (BWP1) for the UE; at the second moment, the traffic of the UE is small, and the system configures a small bandwidth (BWP2) for the UE to meet the basic communication requirement. Wherein each BWP bandwidth should be no less than the bandwidth of SS Block, but may or may not contain SS Block. For example, when the UE in the NR system is in the DRX state, it may not need to transmit data traffic in a short time, so the system may configure the bandwidth of SS Block for the UE, so that the UE may perform downlink time-frequency synchronization through SS Block when downlink synchronization is needed.

For OFDM signal generation, a transmitting end (e.g. a base station) usually needs to perform IFFT processing on information to be transmitted, so as to convert a frequency domain signal into a time domain signal. In order to facilitate a computer to process by using IFFT, the number of sampling points of an OFDM symbol is generally N times of 2, and theoretically, the number of IFFT sampling points is more than that of subcarriers, so that no information loss can be ensured after transformation. Therefore, assuming that there are 1200 subcarriers in the OFDM signal and the subcarrier spacing is 15KHZ, the minimum number of samples greater than 1200 in the power N of 2 is 2048, so 2048 samples, that is, 2048 subcarriers, need to be extracted for IFFT operation, wherein the 1200 samples transmit useful information and the remaining samples are default to zero. Before the air interface of the transmitting terminal is transmitted, only the signal carrying the useful information is transmitted through a filter (therefore, the number of sampling points does not influence the bandwidth of the transmitting terminal); the receiving end (e.g., UE) needs to complement the number of points (since there is no information, it is a known signal) after receiving the FFT sample signal, so that the bandwidth of the FFT sample signal is determined to be 30.72M (15KHZ 2048). But only the middle 18M (15KHZ 1200) is actually valid information. On the other hand, according to the nyquist sampling theorem, the sampling frequency of the real signal must be greater than or equal to 2 times of the maximum frequency of the signal, but OFDM is a complex signal and is single-sided in the frequency spectrum, so that aliasing is not caused by only satisfying the sampling rate of 1 time, that is, the maximum frequency of the real signal is less than 20MHz, and therefore the sampling frequency of 30.72MHz is fully satisfied.

Based on the above, if the FIR filter at the transmitting end in the NR system inputs 256 sampling points to the OFDM symbol where the PBCH in the SS Block is located, and outputs 240 sampling points to design (i.e., filter to the PBCH bandwidth, that is, the SS Block bandwidth), the difficulty is relatively high. However, if the design of outputting 240 sampling points according to inputting 512 sampling points, the implementation is easy and the performance is not affected. Similarly, the FIR filter at the transmitting end is designed to output 144 sampling points (i.e. filtering to the bandwidth of the synchronization signal) for the OFDM symbol where the synchronization signal (PSS/SSS) is located according to the input 256 sampling points, which is easy to implement without affecting the performance. Based on the above, the sampling rate of the input signal of the FIR filter of the receiving end corresponding to the PBCH bandwidth filtered by the transmitting end is 2 times of the sampling rate of the input signal of the FIR filter of the receiving end corresponding to the synchronization signal bandwidth filtered by the transmitting end.

In summary, no matter in the NR high frequency or NR low frequency scenario, the terminal needs to perform time-frequency tracking of the serving cell when in the DRX state. In terms of performance, the performance of the terminal adopting the PBCH bandwidth signal is 2dB better than the performance of performing time-frequency tracking only by using the synchronization signal bandwidth signal, but at this time, the sampling rate (AD sampling rate for short) of Analog Digital (AD) conversion of the terminal receiving the signal is doubled. When the signal quality of the serving cell is good, the performance is not limited any more, and at this time, the standby power consumption of the terminal is affected by still adopting a large AD sampling rate.

In the LTE system, the bandwidth of the UE needs to be consistent with the system bandwidth. For example, when the UE initially accesses the serving Cell, the PSS and the SSS are detected to decode the physical Cell ID, and meanwhile, the downlink subframe time is determined according to the positions of the PSS and the SSS, and further, more accurate downlink time-frequency synchronization is performed through a Cell Reference Signal (CRS), and then, system information such as Bandwidth (Bandwidth: 1.4M, 3M, 5M, 10M, 15M, and 20M) configured by the serving Cell is obtained through broadcast PBCH, and the Cell is successfully camped. Thereafter, when the terminal is in DRX state, time-frequency tracking is required based on the CRS of the serving cell for downlink synchronization, while the CRS of LTE is transmitted on every subframe and spans the entire system bandwidth. Therefore, when the UE performs downlink time-frequency synchronization, it needs to receive signals with a large AD sampling rate (a sampling rate matched with the system bandwidth of the serving cell), thereby affecting standby power consumption.

To sum up, the technical problems that can be solved by the present application include: for wireless communication systems such as an NR system and an LTE system, how to successfully perform downlink synchronization with as little standby power consumption as possible in a DRX state is a terminal. It can be understood that the terminal also needs to perform the search and measurement of the same/different frequency neighbor cells in the DRX state. Therefore, the problem that the standby power consumption of the terminal is too high in the process of measurement scheduling of the same/different-frequency adjacent cells can be solved.

In order to facilitate understanding of the embodiments of the present invention, a communication network architecture on which the embodiments of the present invention are based is described below. Referring to fig. 2, fig. 2 is a diagram of a sampling rate control network architecture according to an embodiment of the present invention, the communication network architecture includes a core network, a network device (e.g., a base station), and a terminal (e.g., a UE). Wherein

A terminal can be an access terminal, subscriber unit, subscriber station, mobile, remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment. For example, the mobile terminal may be a cellular phone, a cordless phone, a smart phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a smart bracelet, a smart wearable device, an MP3 player (Moving Picture Experts Group Audio Layer III, motion Picture Experts compression standard Audio Layer 3), an MP4(Moving Picture Experts Group Audio Layer IV, motion Picture Experts compression standard Audio Layer 3) player, a Personal Digital Assistant (PDA), a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a Road Side Unit (Road Side Unit), a Unit with communication capability, a terminal in a future 5G network, and the like.

The Base Station, which may also be referred to as a network side device, may be a Base Transceiver Station (BTS) in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, or may be an evolved Node B (eNB) in an LTE system, or a Base Station gNB in a 5G system or a new air interface (NR) system. In addition, the base station may also be an Access Point (AP), a Transmission Reception Point (TRP), a Central Unit (CU), or other network entities, and may include some or all of the functions of the above network entities.

The core network mainly provides data support and related services for communication between the terminal and the base station.

It will be appreciated that embodiments of the invention may be applied to various communication systems, for example: a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a long term evolution (long term evolution, LTE) system, an advanced long term evolution (advanced long term evolution, LTE-a) system, a universal mobile telecommunications system (universal mobile telecommunications system, UMTS) or a next-generation communications system such as a 5G Radio access (NR) system (5G NR system for short), a Machine to Machine communications (M2M) system, and the like. It should also be understood that the system to which the embodiment of the present invention is specifically applied includes, but is not limited to, the above-mentioned communication system, and a system to which the power consumption control method of the terminal in the present invention can be applied belongs to the protection and coverage of the present invention.

It is understood that the communication system architecture in fig. 2 is only an exemplary implementation manner in the embodiment of the present invention, and the communication system architecture in the embodiment of the present invention includes, but is not limited to, the above communication system architecture.

The following is a description of a method for controlling power consumption of a terminal according to an embodiment of the present disclosure.

Please refer to fig. 3, which is a flowchart illustrating a power consumption control method of a terminal according to an embodiment of the present application, and is applicable to the communication system described in fig. 2, and will be described below with reference to fig. 3 from an interaction side of the terminal and a serving cell or an adjacent cell of a designated frequency point, where the method may include the following steps S301 to S302, and optionally, may further include step S303.

Step S301: and configuring the analog-to-digital conversion (AD) sampling rate of the first downlink signal of the first cell received by the terminal as a first initial sampling rate.

Specifically, the first cell is a serving cell of the terminal, or the first cell is one or more adjacent cells of the terminal at a designated frequency point; the first initial sampling rate may be a sampling rate preset according to requirements of a system and the like, and may also be a minimum sampling rate meeting a bandwidth requirement of the first downlink signal. The minimum sampling rate meeting the bandwidth requirement of the first downlink signal is the minimum sampling rate meeting the bandwidth requirement of the first downlink signal, which is obtained based on an actual communication system and according to a sampling theorem. It is to be understood that, when communication systems are different or different signal processing manners are adopted, minimum sampling rates calculated for signal bandwidths of the same size may be different, and the minimum sampling rate, that is, the first initial sampling rate, is not specifically limited in the embodiment of the present invention.

Optionally, the first downlink signal is a synchronization signal block SSB or a cell reference signal CRS.

In a possible implementation manner, the first downlink signal is a synchronization signal block SSB in a new air interface NR system, where the synchronization signal block includes a primary synchronization signal PSS, a secondary synchronization signal SSS, and a physical broadcast channel PBCH of the SSB; if the terminal accesses a service cell or an adjacent cell through the BPL; the first downlink signal is a synchronization signal block SSB of the BPL and the first metric of the first cell signal of the terminal is a first metric of the SSB for the BPL; the first sampling rate is the minimum sampling rate meeting the bandwidth requirement of SSB or PSS, and the second sampling rate is the minimum sampling rate meeting the bandwidth requirement of PBCH. That is, when the power consumption control method of the terminal in the embodiment of the present invention is applied to an NR system, the signal quality of a serving cell is evaluated by evaluating the signal quality of an optimal beam BPL of the terminal, and the first sampling rate may be a minimum sampling rate that satisfies a bandwidth requirement of an SSB or a PSS, and the second sampling rate is a minimum sampling rate that satisfies a bandwidth requirement of a PBCH.

For example, based on the OFDM signal processed by IFFT/FFT in the NR system, since the synchronization signal (PSS/SSS) in NR SSB is also the first downlink signal, the symbol occupies 144 subcarriers in 12 RBs, and the PBCH symbol occupies 240 subcarriers in 20 RBs. Based on the foregoing analysis, if the terminal filters to the PBCH bandwidth, that is, the SS Block bandwidth, the relationship between the minimum sample rate corresponding to the SCS value of the first downlink signal, that is, the first initial sampling rate, may be as follows: the corresponding AD sampling frequency, i.e. the first initial sampling rate, is 3.84MHZ (15KHZ 256) for 15KHZ for SCS, 7.68MHZ (30KHZ 256) for 30KHZ for SCS, 30.72MHZ (120KHZ 256) for 120KHZ for SCS, and 61.44MHZ (240KHZ 256) for 240KHZ for SCS.

In a possible implementation manner, the downlink synchronization signal is a CRS signal in an LTE system, and the minimum sampling rate meeting the bandwidth requirement of the first downlink signal is the minimum sampling rate meeting the bandwidth of the LTE system. That is, the power consumption control method of the terminal in the embodiment of the present invention is applied to an LTE system, and estimates the signal quality of a serving cell by estimating the signal quality of the serving cell, and the minimum sampling rate that meets the bandwidth requirement of the first downlink signal is the minimum sampling rate that meets the bandwidth of the LTE system.

For example, based on the OFDM signal processed by IFFT/FFT in the LTE system, the cell reference signal CRS is also a full-bandwidth signal, and the relationship between the frequency point bandwidth and the corresponding minimum sample rate, that is, the first initial sampling rate, may be as follows: when the frequency point bandwidth is 20MHZ, the corresponding AD sampling frequency is 30.72MHZ, the corresponding first initial sampling rate is 23.04MHZ when the frequency point bandwidth is 15 MHZ, and the corresponding AD sampling frequency is 15.36MHZ when the frequency point bandwidth is 10 MHZ; when the frequency point bandwidth is 5MHZ, the corresponding first initial sampling rate is 7.68 MHZ; when the frequency point bandwidth is 3MHZ, the corresponding first initial sampling rate is 3.84 MHZ; when the frequency point bandwidth is 1.4MHZ, the corresponding first initial sampling rate is 1.92 MHZ; i.e. will not be described in detail here.

Step S302: and when the first measurement of the first cell signal of the terminal is superior to the first measurement threshold, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a first sampling rate.

Specifically, the value of the first sampling rate is smaller than the value of the first initial sampling rate. Namely, under the condition that the signal quality of the service cell accessed by the terminal or the adjacent cell of the designated frequency point is good, the first downlink signal is configured and received by using a small sampling rate, so that the quality of the downlink signal received by the terminal can be ensured, the power consumption of the terminal can be reduced, and the user experience is improved. Namely, in the embodiment of the invention, the signal quality of the serving cell or the adjacent cell can be measured and judged according to the preset rule, and if the signal quality is judged to be better, sampling is carried out by adopting a lower sampling rate, so that the sampling signal can meet the requirement, and the standby power consumption of the terminal can be reduced.

Optionally, the first cell signal is the first downlink signal of the first cell. That is, whether the first metric of the first cell signal is better than the first metric threshold may be determined to determine the quality of the first cell signal. Alternatively, it may also be determined whether the first metric of the other related signals of the first cell is better than the first metric threshold. That is, the first cell signal may be the first downlink signal itself, or may be another signal that predicts or helps to judge the quality of the first downlink signal.

In one possible implementation, the exceeding, by the first metric, the first metric threshold for the first cell signal of the terminal includes: when the terminal is in a Discontinuous Reception (DRX) state, the measurement of one or more of signal to interference plus noise ratio (SINR), Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ) of the serving cell in M DRX periods in a first time period is better than a corresponding first measurement threshold, wherein M is an integer greater than or equal to 1. Optionally, the first downlink signal is used for performing downlink synchronization between the terminal and the serving cell. Please refer to fig. 4, where fig. 4 is a schematic diagram of a UE scheduling cycle according to an embodiment of the present invention, in which the UE performs paging monitoring in an idle state with the DRX cycle to perform downlink synchronization. And if the metric of one or more of the SINR, RSRP and RSRQ of the serving cell in M DRX cycles in the first time period is better than the corresponding first metric threshold, it indicates that the relevant parameter measured once or continuously for multiple times needs to be greater than the first metric threshold in a preset time range. For example, when the correlation parameter includes an SINR, the first metric threshold includes a first metric threshold value of the SINR; when the related parameters include SINR and RSRP, the first metric threshold includes a first metric threshold value of SINR and a first metric threshold value of RSRP. By analogy, the other cases are not exhaustive.

According to the embodiment of the invention, the signal quality of the service cell or the adjacent cell of the terminal is monitored when the terminal is in the DRX state, and the downlink synchronization signal or the related signal for downlink synchronization is received by using a lower sampling rate under the condition that the signal quality is better estimated, so that the quality of the downlink signal received by the terminal can be ensured, the standby power consumption in the DRX state can be reduced, and the user experience is improved.

Optionally, in the continuous reception state, the sampling rate (AD sampling rate) in the embodiment of the present invention may also be adjusted, but since main power consumption is consumed in transmitting data traffic during the process of transmitting data and other traffic by the terminal, power for signal sampling only occupies a small part of power consumption of the entire UE, and therefore, the embodiment of the present invention is mainly discussed with respect to the terminal being in the discontinuous reception DRX state.

Specifically, the measurement scheduling of the terminal on multiple adjacent cells (including intra-frequency adjacent cells and/or inter-frequency adjacent cells) of a specified frequency point in the DRX state is different from the measurement scheduling on the serving cell. The terminal needs to search and measure all neighboring cells of a frequency point for the frequency point, so evaluating the first metric or the second metric of the neighboring cells of the serving cell to which the terminal accesses includes evaluating relevant parameters of all neighboring cells for search and measurement of the frequency point (including common frequency or different frequency). Referring to fig. 5, fig. 5 is a schematic diagram illustrating sampling rate control of a serving cell and neighboring cells according to an embodiment of the present invention, where measurement scheduling periods of a terminal for the serving cell, intra-frequency neighboring cells and inter-frequency neighboring cells may be the same or different. And the time when the terminal performs signal quality evaluation for the serving cell, the co-frequency cell or the inter-frequency cell is also different, and the time when the sampling rate of the corresponding downlink signal (first downlink signal) is correspondingly adjusted is also different. The terminal adjusts the sampling rate in the measurement scheduling time period of the service cell or the same/different frequency adjacent cell respectively, and can reduce the standby power consumption of the terminal in the measurement scheduling time period of the service cell, the same frequency cell and the different frequency cell.

Step S303: and when the second metric of the first cell signal of the terminal is lower than the second metric threshold, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a second sampling rate.

Specifically, the value of the second sampling rate is greater than or equal to the first initial sampling rate. The signal quality of a serving cell of the terminal or an adjacent cell of a designated frequency point is monitored in real time, a first downlink signal is received by using a small sampling rate under the condition that the signal quality is evaluated to be good, and further, the first downlink signal is received by using a large sampling rate under the condition that the signal quality is evaluated to be poor.

In one possible implementation, the second metric being worse than the second metric threshold for the first cell signal of the terminal includes that, when the terminal is in the DRX state, a metric of one or more of SINR, RSRP, and RSRQ of the first cell signal is worse than the corresponding second metric threshold for N DRX cycles in the second time period, where N is an integer greater than or equal to 1. In the embodiment of the invention, the signal quality of the service cell or the adjacent cell of the terminal is monitored in real time when the terminal is in the DRX state, and the downlink synchronization signal or the related signal for downlink synchronization is received by using a lower sampling rate under the condition that the signal quality is better estimated, and further, the downlink synchronization signal or the related signal for downlink synchronization is received by using a higher sampling rate under the condition that the signal quality is poorer estimated.

For example, when the signal quality of all cells in the RRM measurement list for a certain frequency point is good, the terminal receives the frequency point cell signal at a smaller AD sampling rate. Otherwise, receiving the frequency point cell signal according to a larger AD sampling rate. Specifically, the condition that the signal quality of all cells in the frequency point RRM measurement list is good includes that the Metric (one or more of the optional SINR, RSRP, and RSRQ) of each cell is compared with a preset threshold, and if the Metric is greater than or equal to the threshold, the quality is determined to be good, otherwise, the quality is determined to be poor. For example, in the NR system, each cell in the RRM measurement list selects the optimal Z BPL metrics Metric, which can be directly compared in the LTE system.

The embodiment of the invention can respectively and independently monitor the signal quality of the service cell and the adjacent cell, and respectively adjust the sampling rate of the terminal for receiving the downlink signal in the service cell or the adjacent cell based on the quality of the evaluated signal quality. Optionally, the signal quality of the serving cell and the signal quality of the neighboring cell may also be monitored simultaneously, that is, when the terminal is in the DRX state, the signal quality of the serving cell to which the terminal is connected is monitored in real time, and the sampling rate is adjusted based on the quality of the evaluated signal quality, and the signal quality of the neighboring cell of the serving cell is further monitored, and the sampling rate at which the terminal receives the downlink signal in the neighboring cell is also adjusted based on the quality of the evaluated signal quality.

The first time period and the second time period in the present application may be equal or different, and the present application is not particularly limited to this. The values of the parameters can be obtained and set in advance according to a certain rule or algorithm.

In a possible implementation manner, the values of N and M may be equal or different. Optionally, M is an integer greater than 1, and N is equal to 1, that is, when it is evaluated whether the signal quality of the serving cell is good, the determination may be performed based on the relevant parameters measured in multiple DRX cycles, so as to avoid that the sampling rate is adjusted to be smaller by mistake due to a transient or accidental first metric being better than the first metric threshold, so that the signal quality of the sampling cannot be guaranteed; however, when evaluating whether the signal quality of the serving cell is poor, the determination may be performed only based on the relevant parameters measured in one DRX cycle, so as to avoid the risk that the downlink time-frequency synchronization cannot be completed due to the fact that the signal quality is possibly poor and the sampling rate is not adjusted up in time as far as possible.

In a possible implementation manner, after configuring the AD sampling rate of the terminal for receiving the first downlink signal to be a second sampling rate, the terminal may be controlled to receive the first downlink signal with the second sampling rate for X consecutive DRX cycles, where X is an integer greater than or equal to 1. That is, when the terminal is in the DRX state, the signal quality of the serving cell to which the terminal is connected is monitored in real time, and when the signal quality is evaluated to be poor, the first downlink signal, for example, the downlink synchronization signal or the related signal for performing downlink synchronization, is received by using a larger sampling rate in X consecutive DRX cycles, so as to enhance the robustness of the system.

In a possible implementation manner, when a first cell signal of the terminal does not satisfy that neither a first metric is better than a first metric threshold nor a second metric is worse than a second metric threshold, the terminal is controlled to maintain a current sampling rate to receive the first downlink signal of the first cell. In the embodiment of the present invention, when M and N are not equal to 1 at the same time, that is, when at least one of M and N is greater than 1, there may be a case where neither the first metric better than the first metric threshold nor the second metric worse than the second metric threshold is satisfied. At this time, the terminal may keep the last sample rate configuration result unchanged, and perform sample rate reconfiguration until the first metric is better than the first metric threshold or the second metric is worse than the second metric threshold.

For example, when M ═ 1, and N ═ 1; referring to fig. 6, fig. 6 is a schematic diagram illustrating a sampling rate control according to an embodiment of the present invention, and in fig. 6, the signal quality measured in each DRX cycle determines a sampling rate corresponding to a next DRX cycle.

For example, when M is greater than 1 and N is 1 or M is 1, N is greater than 1; referring to fig. 7, fig. 7 is a schematic diagram illustrating another sampling rate control according to an embodiment of the present invention, that is, a plurality of DRX cycles may determine a sampling rate of a next DRX cycle. Further, for example, when M is greater than 1 and N is 1, or M is 1, N is greater than 1; and X ═ 2; referring to fig. 8, fig. 8 is a schematic diagram illustrating another sampling rate control scheme according to an embodiment of the present invention, that is, a plurality of DRX cycles may determine sampling rates of a plurality of subsequent DRX cycles.

In the above steps S302 and S303, when applied to the NR system, since a carrier frequency higher than that of LTE, such as 38GHz, 72GHz, etc., is adopted in the 5G communication system, wireless communication with a larger bandwidth and a higher transmission rate is realized. Due to the higher carrier frequency, the transmitted wireless signal experiences more severe fading during the spatial propagation process, and even the wireless signal is difficult to detect at the receiving end. For this reason, in the 5G communication system, a beamforming (beamforming) technique is used to obtain a beam with good directivity, so as to increase the power in the transmitting direction, thereby improving the signal to interference plus noise ratio SINR at the receiving end. In order to improve communication quality, beamforming technology is also used at a User Equipment (UE) side to generate analog beams in different directions for receiving and transmitting data. Since both the base station and the user equipment communicate using narrower analog beams, better communication quality is obtained only when the analog beams for transmission and reception are aligned. Therefore, it has been determined in 3GPP RAN1 conferences that a Beam scanning (Beam sweeping) procedure is used in NR to determine Beam pairs between a base station and a UE, and to monitor multiple Beam pairs during a communication procedure to improve the robustness of the communication link. Therefore NR is based on serving cell optimal BPL.

For example, for a specific implementation example of the sampling rate control in the serving cell measurement scheduling phase in the DRX state in the NR system:

1) when the terminal is in the DRX state, the period of scheduling reception of the serving cell signal is T, i.e., the DRX period is T.

2) When the 1 st scheduling receives the serving cell signal, the serving cell signal (e.g., the first downlink signal) is received at a larger AD sampling rate of 512 SCS _ KHz (which may be set at SCS _ KHz value 15/30/120/240, which may be determined when accessing the serving cell). A Metric (one or more of optional SINR, RSRP, RSRQ) of the serving cell optimal BPL (the best BPL, the determination of which may be considered prior art) is calculated. If the Metric selected by the serving cell optimal BPL passes the preset threshold (e.g., SINR > -preset threshold a, RSRP > -preset threshold b, RSRQ > -preset threshold c), then the serving cell signal is received at the smaller AD sampling rate of 256-SCS _ KHz when the 2 nd scheduling receives the serving cell signal.

3) When scheduling and receiving the serving cell signal for the jth time, if the optimal BPL Metric passes a preset threshold, then when scheduling and receiving the serving cell signal for the jth +1 th time, receiving the serving cell signal according to the smaller AD sampling rate of 256 × SCS _ KHz. Otherwise, the serving cell signal is received at the larger AD sampling rate 512 SCS _ KHz.

4) A decision hysteresis mechanism may be employed: the AD sampling rate is changed from large to small only when the continuous M (preset threshold for the terminal) times of scheduling pass through the preset threshold; the AD sampling rate is changed from small to large until N consecutive (preset threshold for terminal) schedules fail to pass the preset threshold. For example, M is 2 and N is 1, or M is 4 and N is 2.

5) A hysteresis mechanism of the AD sampling rate may be added, and the terminal performs sampling at a larger AD sampling rate, that is, the second sampling rate, all at the same time when determining to configure the sampling rate as the second sampling rate and receive the serving cell signal for X consecutive times. For example, X can be 2, 3, 4, etc.

□ for example, for the specific implementation example of the sampling rate control of the serving cell measurement scheduling phase in DRX state in LTE system:

1) the larger AD sampling rate (i.e., the second sampling rate) refers to a sampling rate that is at least a match to the serving cell bandwidth: for example, in the case of 20M/15M bandwidth, the AD sampling rate > is 30.72M, in the case of 10M bandwidth, the AD sampling rate > is 15.36M, in the case of 5M bandwidth, the AD sampling rate > is 7.68M, in the case of 3M bandwidth, the sampling rate > is3.84M, and in the case of 1.4M bandwidth, the sampling rate > is1.92M.

2) A smaller AD sampling rate (i.e., the first sampling rate) refers to a sampling rate that is matched to choose a smaller bandwidth than the serving cell bandwidth, and is less than the larger AD sampling rate. Such as: the serving cell bandwidth is 20M, the larger AD sampling rate is 30.72M, and the smaller AD sampling rate is 15.36M.

3) LTE compares the Metric of the serving cell directly with a preset threshold, unlike when NR, which compares the Metric of the serving cell optimal BPL with a preset threshold. Other related expressions referring to NR systems will not be described herein.

According to the embodiment of the invention, when the terminal is in the DRX state, the terminal self-adaptively adjusts the AD sampling rate of the received service cell signal, and reduces the standby power consumption of the terminal.

Optionally, the embodiment of the present invention may further include a scheme of a terminal for adaptive AD sampling rate in the measurement and scheduling phase of the intra-frequency cell and the inter-frequency cell. In the above step S302 and step S303, the control of the sampling rate corresponding to the co-frequency cell and the inter-frequency cell in the NR system and the LTE system is taken as an example.

For example, for a specific implementation example of the sampling rate control in the measurement scheduling stage of the intra-frequency or inter-frequency cell in the DRX state in the NR system:

1) the terminal is in a measurement scheduling stage of a certain co-frequency or inter-frequency cell in a DRX state.

2) When the DRX for performing the frequency point cell measurement scheduling receives the frequency point cell signal (i.e., the first downlink signal), the DRX receives the frequency point cell signal according to the larger AD sampling rate (i.e., the second sampling rate) 512 SCS _ KHz (which can be set to SCS _ KHz 15/30/120/240, and can be determined by RRM measurement configuration of the frequency point), performs the frequency point cell search, measures the searched cells and cells in the RRM measurement list, and calculates Metric metrics of Metric N BPLs (one or more of SINR, RSRP, and RSRQ) of each cell of the frequency point (BPL priority ordering can be regarded as the prior art). If the Metric selected by the optimal Z BPLs of each cell of the frequency point passes through a preset threshold (for example, SINR > -a, RSRP > -b, RSRQ > -c), when the 2 nd DRX performing the cell measurement scheduling of the frequency point receives the cell signal of the frequency point, the DRX receives the cell signal of the frequency point according to a smaller AD sampling rate (i.e., a first sampling rate) -256 SCS _ KHz.

3) When the jth DRX for performing the frequency point cell measurement scheduling receives the frequency point cell signal, if the optimal N BPL measurement metrics Metric of each cell of the frequency point pass a preset threshold, the jth +1 DRX for performing the frequency point cell measurement scheduling receives the frequency point cell signal, and the frequency point cell signal is received according to the smaller AD sampling rate (256 SCS _ KHz). Otherwise, the frequency point cell signal is received at the larger AD sampling rate 512 SCS _ KHz.

4) The following hysteresis mechanism may be added: changing the AD sampling rate from large to small only when M continuous DRX (preset threshold for terminal) for carrying out cell measurement scheduling of the frequency point pass through the preset threshold; and changing the AD sampling rate from small to large until N continuous DRX (preset thresholds for the terminal) for carrying out cell measurement scheduling of the frequency point do not pass the preset threshold.

It can be understood that each frequency point with same frequency and different frequency can independently perform AD sampling rate adaptation.

For example, for a specific implementation example of the sampling rate control in the measurement scheduling phase of the co-frequency or inter-frequency cell in the DRX state in the LTE system:

1) the larger AD sampling rate (i.e. the second sampling rate) is at least a sampling rate matching the cell measurement bandwidth of the frequency point: the bandwidth is 20M/15M, the AD sampling rate > is 30.72M, the bandwidth is 10M, the AD sampling rate > is 15.36M, the bandwidth is 5M, the AD sampling rate > is 7.68M, the bandwidth is 3M, the sampling rate > is 3.84M, and the bandwidth is 1.4M, the sampling rate > is 1.92M.

2) The smaller AD sampling rate (i.e. the first sampling rate) is a sampling rate matched with the selection of a bandwidth smaller than the cell measurement bandwidth of the frequency point, and is smaller than the larger AD sampling rate. Such as: the serving cell bandwidth is 20M, the larger AD sampling rate is 30.72M, and the smaller AD sampling rate is 15.36M.

3) The LTE directly compares the Metric Metric of each cell of the frequency point with a preset threshold, and other systems can refer to an NR system.

The method of the embodiments of the present invention is explained in detail above, and the related apparatus of the embodiments of the present invention is provided below.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present invention, and the terminal 10 may include a processing unit 101, where the processing unit 101 is described in detail as follows.

A processing unit 101, configured to configure an analog-to-digital conversion AD sampling rate of a downlink synchronization signal received by the terminal from a first cell to be a first initial sampling rate; the first cell is a service cell of the terminal, or the first cell is one or more adjacent cells of the terminal at a designated frequency point;

the processing unit 101 is further configured to configure an AD sampling rate at which the terminal receives the first downlink signal as a first sampling rate when a first metric of a first cell signal of the terminal is better than a first metric threshold; wherein the value of the first sampling rate is less than the value of the first initial sampling rate.

In a possible implementation manner, the processing unit 101 is specifically configured to:

In a possible implementation manner, when the first cell is a plurality of adjacent cells of the terminal at a designated frequency point; the first cell signal is a plurality of adjacent cell signals; the processing unit 101 is specifically configured to:

In one possible implementation, the processing unit 101 is further configured to:

In a possible implementation manner, the downlink synchronization signal is a synchronization signal block SSB or a cell reference signal CRS.

In a possible implementation manner, the first cell signal is the downlink synchronization signal of the first cell.

It should be noted that, for the functions of the functional units in the terminal 10 described in the embodiment of the present invention, reference may be made to the related description of the method embodiment described in fig. 1 to fig. 8, and details are not repeated herein.

Fig. 10 is a schematic structural diagram of another terminal provided in the embodiment of the present application. As shown in fig. 10, the terminal includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly configured to process a communication protocol and communication data, control the terminal, execute a software program, process data of the software program, and the like, for example, to control and execute a flow corresponding to the power consumption control method of the terminal in fig. 3, which may be specifically referred to the description of the relevant part. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user. It should be noted that some kinds of terminals may not have input/output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 10. In an actual end product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment.

In the embodiment of the present application, the antenna and the radio frequency circuit having the transceiving function may be regarded as a transceiving unit of the terminal, and the processor having the processing function may be regarded as a processing unit of the terminal. As shown in fig. 10, the terminal includes a transceiving unit 201 and a processing unit 202. A transceiver unit may also be referred to as a transceiver, a transceiving device, etc. A processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, or the like. The processing unit may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP. The processing unit may further comprise a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof. Optionally, a device for implementing the receiving function in the transceiver 201 may be regarded as a receiving unit, and a device for implementing the transmitting function in the transceiver 201 may be regarded as a transmitting unit, that is, the transceiver 201 includes a receiving unit and a transmitting unit. A transceiver unit may also sometimes be referred to as a transceiver, transceiving circuitry, or the like. A receiving unit may also be referred to as a receiver, a receiving circuit, or the like. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc. When the communication device is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit can be an input/output circuit and a communication interface; the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip.

It should be noted that, for the functions of each functional unit in the device described in the embodiment of the present invention, reference may be made to the description of the relevant functions of the terminal in the method embodiment described in fig. 1 to fig. 8, and details are not described here again.

The embodiment of the present application further provides a computer storage medium, where the computer storage medium may store a program, and the program includes, when executed, some or all of the steps of the power consumption control method of any one of the terminals described in the above method embodiments.

An embodiment of the present application also provides a computer program, where the computer program includes instructions, and when the computer program is executed by a computer, the computer may execute some or all of the steps of the power consumption control method of any terminal.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like, and may specifically be a processor in the computer device) to execute all or part of the steps of the above-described method of the embodiments of the present application. The storage medium may include: a U-disk, a removable hard disk, a magnetic disk, an optical disk, a Read-Only Memory (ROM) or a Random Access Memory (RAM), and the like.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

A power consumption control method of a terminal, comprising:

configuring an analog-to-digital conversion (AD) sampling rate of a first downlink signal of a first cell received by the terminal as a first initial sampling rate; the first cell is a service cell of the terminal, or the first cell is one or more adjacent cells of the terminal at a designated frequency point;

when the first measurement of the first cell signal of the terminal is superior to a first measurement threshold, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a first sampling rate;

wherein the value of the first sampling rate is less than the value of the first initial sampling rate.
The method of claim 1, wherein the first metric of the terminal's first cell signal being better than a first metric threshold comprises: when the terminal is in a Discontinuous Reception (DRX) state, in M DRX periods in a first time period, the measurement of one or more of the signal to interference plus noise ratio (SINR), the Reference Signal Received Power (RSRP) and the Reference Signal Received Quality (RSRQ) of the first cell signal is better than a corresponding first measurement threshold, wherein M is an integer greater than or equal to 1.
The method of claim 2, wherein when the first cell is a plurality of adjacent cells of the terminal at a designated frequency point; the first cell signal is a plurality of adjacent cell signals;

the metric of one or more of SINR, RSRP, and RSRQ of the first cell signal is better than the corresponding first metric threshold in M DRX cycles in the first time period, including:

the metric of one or more of SINR, RSRP and RSRQ of all neighboring cell signals of the plurality of neighboring cell signals is better than the corresponding first metric threshold for M DRX cycles in the first time period.
The method of any one of claims 1-3, further comprising:

when the second metric of the first cell signal of the terminal is lower than a second metric threshold, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a second sampling rate; and the value of the second sampling rate is greater than or equal to the first initial sampling rate.
The method of claim 4, wherein the second metric being worse than a second metric threshold for the first cell signal of the terminal comprises a metric for one or more of SINR, RSRP, and RSRQ of the first cell signal being worse than a corresponding second metric threshold for N DRX cycles within a second time period when the terminal is in a DRX state, where N is an integer greater than or equal to 1.
The method of claim 5, wherein when the first cell is a plurality of adjacent cells of the terminal at a designated frequency point; the first cell signal is a plurality of adjacent cell signals;

the metric of one or more of SINR, RSRP, and RSRQ of the first cell signal over N DRX cycles in the second time period is inferior to a corresponding second metric threshold, comprising:

the metric of one or more of SINR, RSRP, and RSRQ of any one of the plurality of neighboring cell signals is inferior to a corresponding second metric threshold for N DRX cycles in a second time period.
The method according to any of claims 1-6, wherein the first downlink signal is a synchronization signal block, SSB, or a cell reference signal, CRS.
The method of any of claims 1-7, wherein the first cell signal is the first downlink signal of the first cell.
A terminal, comprising:

the terminal comprises a processing unit, a first cell and a second cell, wherein the processing unit is used for configuring the analog-to-digital conversion (AD) sampling rate of a first downlink signal of the first cell received by the terminal as a first initial sampling rate; the first cell is a service cell of the terminal, or the first cell is one or more adjacent cells of the terminal at a designated frequency point;

the processing unit is further configured to configure an AD sampling rate at which the terminal receives the first downlink signal as a first sampling rate when a first metric of a first cell signal of the terminal is better than a first metric threshold;

wherein the value of the first sampling rate is less than the value of the first initial sampling rate.
The terminal according to claim 9, wherein the processing unit is specifically configured to:

when the terminal is in a Discontinuous Reception (DRX) state and in M DRX periods in a first time period, when the measurement of one or more of the signal to interference plus noise ratio (SINR), the Reference Signal Received Power (RSRP) and the Reference Signal Received Quality (RSRQ) of the first cell signal is better than a corresponding first measurement threshold, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a first sampling rate; wherein M is an integer greater than or equal to 1.
The terminal of claim 10, wherein when the first cell is a plurality of adjacent cells of the terminal at a designated frequency point; the first cell signal is a plurality of adjacent cell signals; the processing unit is specifically configured to:

and when the terminal is in a DRX state and in M DRX periods in a first time period, and when the metric of one or more of SINR, RSRP and RSRQ of all the adjacent cell signals in the adjacent cell signals is better than a corresponding first metric threshold, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a first sampling rate.
The terminal of any of claims 9-11, wherein the processing unit is further to:

when the second metric of the first cell signal of the terminal is lower than a second metric threshold, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a second sampling rate; and the value of the second sampling rate is greater than or equal to the first initial sampling rate.
The terminal according to claim 12, wherein the processing unit is specifically configured to:

when the terminal is in a DRX state and in N DRX periods in a second time period, when the metric of one or more of SINR, RSRP and RSRQ of the first cell signal is inferior to a corresponding second metric threshold, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a second sampling rate; wherein N is an integer greater than or equal to 1.
The terminal of claim 13, wherein when the first cell is a plurality of adjacent cells of the terminal at a designated frequency point; the first cell signal is a plurality of adjacent cell signals; the processing unit is specifically configured to:

and when the terminal is in a DRX state and the measurement of one or more of SINR, RSRP and RSRQ of any one of the plurality of adjacent cell signals is inferior to a corresponding second measurement threshold in N DRX periods in a second time period, configuring the AD sampling rate of the terminal for receiving the first downlink signal as a second sampling rate.
The terminal according to any of claims 9-14, wherein the first downlink signal is a synchronization signal block, SSB, or a cell reference signal, CRS.
The terminal of any of claims 9-15, wherein the first cell signal is the first downlink signal of the first cell.
A chip system, comprising at least one processor, a memory; the memory and the at least one processor are interconnected by a line, the at least one memory having instructions stored therein; the method of any of claims 1-8 implemented when the instructions are executed by the processor.