Method executed by user equipment and user equipment

Abstract

The invention provides a method executed by user equipment and the user equipment. The method comprises: a UE receiving an indication on a wake-up signal (LP-WUS) from a network, the indication comprising at least a second indication and a third indication among a first indication, a second indication, and a third indication, the first indication being used to indicate that the UE detects the LP-WUS according to the second indication or the second indication and the third indication, and the third indication being used to indicate that the UE detects the LP-WUS according to the second indication or the second indication and the third indication. The second indication comprises configuration parameters of the LP-WUS, and the third indication is used for indicating whether the UE detects the LP-WUS in a time domain range determined by the first indication and / or the second indication; the UE determines whether to detect the LP-WUS according to the second indication or to detect the LP-WUS according to the second indication and the third indication based on the indication; and in the event that the LP-WUS is detected, the UE determines whether the primary receiver MR needs to detect the PDCCH on the associated PDCCH opportunity according to the indication of the LP-WUS. Thus, power consumption of the user equipment can be reduced in wireless communication, and low latency can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and particularly to a method for determining downlink frequency domain resources performed by a user equipment and a corresponding user equipment. Background Art

[0002] This section introduces aspects that may help better understand the present invention. Therefore, the statements in this section should be read from this perspective and should not be construed as admitting what is prior art and what is not prior art.

[0003] 5G systems can be used for mobile phones and various vertical applications. In addition to latency, reliability, availability, etc., the energy efficiency of user equipment is also one of the key elements for 5G. In the current system, generally, 5G devices consume dozens of milliwatts in the RRC idle / inactive state and hundreds of milliwatts of electrical energy in the RRC connected state. Depending on different application scenarios, 5G devices may need to be charged weekly or daily. Therefore, a design for further extending the battery life is necessary for improving energy efficiency and a better user experience. For devices using micro batteries or inconvenient to charge, such as sensors, automatic controllers, wearable devices, etc., the standby time may be 1-2 weeks or longer, and improving their energy usage efficiency is even more critical.

[0004] User equipment can generally use discontinuous reception (DRX) to save power, and the power saving effect depends on parameters such as the configured cycle and activation time. To improve the power saving effect to meet the requirements of battery life, it can be achieved by applying a DRX cycle with a longer cycle value, but this will result in high response latency and is not suitable for some scenarios. For example, for terminal devices used in fire detection and extinguishing devices, the total response time is only 1-2 seconds, and using this longer cycle DRX method cannot meet the requirements of both low power consumption and low latency. Therefore, it is necessary to study an ultra-low power consumption mechanism with low latency, for example, the latency needs to be less than the latency brought by using DRX in the prior art.

[0005] On the other hand, when DRX is applied in the current system, the user equipment needs to wake up at each DRX cycle periodically to detect the control channel. Even when there is no data transmission for the user equipment, the user equipment consumes power periodically. If the user equipment can wake up only when there is a service demand, the power consumption of the user equipment will be greatly reduced. Therefore, an ultra-low-power receiver can be configured for the user equipment to detect the wake-up signal (LP-WUS) sent by the base station. When there is no service, the main receiver of the user equipment can remain in the sleep state until the gNB sends an LP-WUS signal to notify the user equipment to perform data processing. The ultra-low-power receiver of the user equipment detects the LP-WUS signal and wakes up the main receiver to perform corresponding data processing. The detection period of the LP-WUS signal can be configured to be less than the maximum time allowed by the user service delay. In this way, the user equipment can achieve low power consumption and low latency while ensuring the correct progress of the service. To achieve such a design goal, there are several problems to be solved in the system, such as how the user equipment should detect the LP-WUS signal and on which time slots the LP-WUS signal needs to be detected, etc. Summary of the Invention

[0006] To solve at least a part of the above problems, the present invention provides a method executed by a user equipment and the user equipment, which can reduce the power consumption of the user equipment in wireless communication and can achieve low latency.

[0007] According to a first aspect of the present invention, there is provided a method executed by a user equipment UE, including: the UE receives an indication about a wake-up signal LP-WUS from a network, the indication at least includes the second indication and the third indication among the first indication, the second indication and the third indication, the first indication is used to indicate whether the UE detects the LP-WUS according to the second indication or the second indication and the third indication, the second indication contains configuration parameters of the LP-WUS, and the third indication is used to indicate whether the UE detects the LP-WUS within a time domain range determined by the first indication and / or the second indication; the UE determines whether to detect the LP-WUS according to the second indication or according to the second indication and the third indication based on the indication; and when the LP-WUS is detected, the UE determines whether a main receiver MR needs to detect a PDCCH on a related PDCCH opportunity according to the indication of the LP-WUS.

[0008] In addition, according to a second aspect of the present invention, there is provided a user equipment, including: a processor; and a memory storing instructions, wherein the instructions execute the above method when run by the processor.

[0009] Advantages of the Invention

[0010] According to the present invention, power consumption of a user equipment can be reduced in wireless communication, and low latency can be achieved. Description of the Drawings

[0011] The above and other features of the present invention will become more apparent from the following detailed description in conjunction with the accompanying drawings, wherein:

[0012] Figure 1 is a flowchart showing a method performed by a user equipment UE according to the present invention.

[0013] Figure 2 is a block diagram showing a user equipment UE according to the present invention. Detailed Embodiments

[0014] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the present invention should not be limited to the specific embodiments described below, and these embodiments are only provided as examples to convey the scope of the subject matter to those skilled in the art. In addition, for the sake of simplicity, detailed descriptions of well-known technologies not directly related to the present invention are omitted to prevent confusion in the understanding of the present invention.

[0015] Generally, unless clearly given and / or implied a different meaning in the context in which the term is used, all terms used herein will be interpreted according to their ordinary meaning in the relevant technical field. Unless explicitly stated, all references to an element, device, component, part, step, etc. shall be publicly interpreted as referring to at least one instance of the element, device, component, part, step, etc. Unless a step must be explicitly described as after or before another step and / or implicitly a step must be after or before another step, the steps of any method disclosed herein need not be performed in the exact order disclosed. In appropriate cases, any feature of any embodiment disclosed herein can be applied to any other embodiment. Similarly, any advantage of any embodiment can be applied to any other embodiment, and vice versa.

[0016] The following describes multiple embodiments according to the present invention by taking the 5G / NR mobile communication system and its subsequent evolved versions as an example application environment. However, it should be noted that the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as communication systems after 5G, 4G and 3G mobile communication systems before 5G, 802.11 wireless networks, and so on.

[0017] It should be noted that the "user equipment" mentioned in the specification of the present invention may refer to various user equipment, including mobile phones, notebooks, wireless network cards, wireless nodes, Internet of Things terminals, and other devices that can communicate wirelessly with network equipment. Users, terminals, UEs, etc. in the following text have the same meaning as user equipment and will not be specifically distinguished and defined hereinafter. Similarly, the network equipment is a device that communicates with the user equipment and may refer to a mobile communication data and control switching center with a large transmission power and a wide coverage area, including functions such as resource allocation and scheduling, data reception and transmission, including but not limited to base stations, micro base stations, gNBs, eNBs, wireless APs, wireless relays, user equipment with relay capabilities, etc., which will not be specifically distinguished and defined hereinafter. In the text, the base station can be used as a form of implementation of the network equipment for illustration, and other forms of network equipment can be easily replaced during specific implementation.

[0018] In the NR network, a solution to reduce the power consumption of the user equipment is that the user equipment uses a low-power receiver (LR) to detect the wake-up signal (WUS) sent by the base station to determine the state of the UE. When there is no data to be transmitted, the main receiver (MR) of the user equipment can be kept in the sleep state to reduce the power consumption of the user equipment; when there is data to be transmitted, the user equipment wakes up the MR according to the indication of the LP-WUS and performs corresponding data processing. This enables the user equipment to only activate the MR for relevant data processing when necessary, otherwise it can enter the low-power sleep state, thus greatly reducing the average power consumption of the user equipment. Since the WUS here is often detected by the low-power receiver in the UE that does not depend on the main receiver, it can also be called LP-WUS (low-power LP-WUS). In the following text, LP-WUS can also be simply referred to as WUS without further explanation.

[0019] The LP-WUS signal may explicitly or implicitly contain relevant information required to wake up the user equipment, such as the user equipment ID, the indication bit or sequence for the corresponding user equipment, etc. The user equipment can determine whether the user equipment is woken up by an LP-WUS signal according to the relevant information. When the user equipment detects the wake-up indication information for the user equipment or user group, the user equipment wakes up the MR for relevant data transmission. In this way, the user equipment can maintain the connection with the network with the minimum power consumption and reduce the network response latency. When such a method is applied in the network, there are several problems to be solved, such as when the user equipment needs to detect the LP-WUS signal, when it does not need to detect the LP-WUS signal, how to perform subsequent processing after detecting the LP-WUS signal, how to handle it when located in different LP-WUS signal coverage areas, etc. The present invention provides relevant methods to solve the above problems, so that through the mutual cooperation of the base station and the user equipment, the user equipment can obtain a better power consumption saving effect.

[0020] Figure 1 It is a flowchart showing the method executed by the user equipment UE involved in the present invention. As Figure 1 shown, in the first step, the UE receives an indication about the wake-up signal LP-WUS from the network. The indication at least includes the second indication and the third indication among the first indication, the second indication, and the third indication. The first indication is used to indicate whether the UE detects the LP-WUS according to the second indication or the second indication and the third indication. The second indication contains the configuration parameters of the LP-WUS. The third indication is used to indicate whether the UE detects the LP-WUS within the time domain range determined by the first indication and / or the second indication. In the second step, the UE determines whether to detect the LP-WUS according to the second indication or according to the second indication and the third indication based on the indication. In the third step, when the UE detects the LP-WUS, it determines whether the main receiver MR needs to detect the PDCCH on the relevant PDCCH opportunity according to the indication of the LP-WUS.

[0021] Through the above method of the present invention, the power consumption of the user equipment can be reduced in wireless communication, and low latency can be achieved.

[0022] The following provides embodiments for a more detailed description of the implementation manner of the present invention.

[0023]

Embodiment 1

[0024] In an NR network, a user equipment in the connected state (RRC CONNECTED) can use LP-WUS to achieve more power consumption savings. For example, the UE determines whether the MR needs to detect the PDCCH on the relevant PDCCH (Physical downlink control channel) opportunity according to the indication of LP-WUS. If it is not necessary to detect the PDCCH according to the indication of LP-WUS, the MR can stay in the dormant state to reduce power consumption.

[0025] The LP-WUS signal may use the OOK (on-off keying) modulation method to generate the signal to simplify the receiver structure. Generally speaking, its link performance is worse than that of the OFDM (Orthogonal Frequency Division Multiplexing) signal with the same power spectral density. That is, when using the same downlink power, the downlink coverage range of LP-WUS is smaller than that of other channels using OFDM, such as the PDCCH. In addition, the LRs used to receive LP-WUS in different terminals may have different capabilities. For example, some LRs have a relatively high NF (Noise figure) compared to the MR, which will also result in the link performance of the LR receiving LP-WUS being worse than that of the MR receiving other channels. Different UEs may also have different capabilities. For example, some UEs can obtain better reception performance by using the carrier signal in the OOK modulation signal of LP-WUS, and so on. At this time, the network may instruct UEs with different capabilities to use different modes to receive the LP-WUS signal. On the other hand, the network can also improve the downlink reception performance of LP-WUS by means of increasing power, retransmitting, etc.

[0026] Generally, the network provides the configuration parameters of LP-WUS to the terminal through RRC signaling, such as the frequency-domain resources and bandwidth of the LP-WUS signal, the time-domain period and symbol length, etc. The UE can determine on which resource blocks and time-domain positions it can detect LP-WUS according to these configuration parameters, that is, determine the detection opportunity of LP-WUS. On the other hand, if the UE determines to detect LP-WUS only according to the RRC configuration of the network and determines whether to detect the PDCCH according to the detection result of LP-WUS, there may be some problems. For example, for a user equipment with a worse reception performance of LP-WUS than that of the PDCCH, when it moves out of the coverage area of LP-WUS but is still within the coverage area of the PDCCH, the UE may still continue to detect the relevant wake-up information according to the previously configured LP-WUS to enable the detection of the PDCCH. In fact, at this time, the UE outside the coverage area of LP-WUS cannot correctly receive the LP-WUS signal, and thus cannot trigger the detection of the relevant PDCCH, resulting in the interruption of services. An improved solution is that the UE determines whether to detect LP-WUS only according to the semi-static LP-WUS configuration or also according to the dynamic indication, that is, the indication in the MAC-CE or DCI, according to the indication of the network. The UE can report relevant capabilities of the UE, as well as measurement reports, etc., and the base station can indicate the relevant behavior of the UE according to the downlink signal coverage in this network, the capabilities of the UE, and the measurement results reported by the UE.

[0027] In an alternative embodiment, the network may, according to relevant information, indicate to the UE through a first indication that the UE detects LP-WUS according to a second indication or a second indication and a third indication.

[0028] The UE detects LP-WUS according to the second indication, that is, when the UE receives the second indication, it detects LP-WUS on the detection opportunity of LP-WUS determined by each parameter in the second indication. The UE detects LP-WUS according to the second indication and the third indication, that is, when the UE receives the second indication, it detects LP-WUS on the detection opportunity of LP-WUS determined by each parameter in the second indication and determines the detection opportunity of LP-WUS in some time-domain ranges according to the third indication.

[0029] Exemplarily, the first indication and the second indication are RRC signaling for semi-static parameter and mode indication. The first or second indication may contain multiple parameters. For example, the second indication may contain the frequency domain position of LP-WUS, the bandwidth parameter, the period, the time slot offset, the number of symbols, the position of the associated bit information in the indication information transmitted by the UE in LP-WUS, etc. The first indication may contain some parameters such as the effective duration length parameter for the UE to detect LP-WUS in the time domain, the detection mode used by the UE, etc. The third indication is MAC-CE or DCI signaling, which is used to indicate whether the UE detects LP-WUS within the time domain range determined according to the relevant configuration when the UE uses the third indication to determine the detection of LP-WUS.

[0030] Optionally, the base station may indicate the relevant actions of the UE through one of the following combinations of indications:

[0031] · The base station configures the second indication for the UE and does not configure the first indication for the UE. The UE applies the default first indication, and the UE determines the detection of LP-WUS according to the second indication.

[0032] · The base station configures the second indication for the UE and also configures the first indication for the UE. The UE determines the detection of LP-WUS according to the second indication and the third indication.

[0033] · The base station configures the second indication for the UE, configures the first indication for the UE, and indicates the detection mode in the first indication, that is, whether the UE determines the detection of LP-WUS according to the second indication or according to the second indication and the third indication.

[0034] Optionally, the UE determines the detection of LP-WUS according to the second indication or the second and third indications, which also includes determining the time domain range for detecting LP-WUS and detecting LP-WUS on the LP-WUS detection opportunities within the time domain range. On the one hand, the UE determines the detection of LP-WUS according to the second indication, including detecting LP-WUS on the time slots during the effective period of the second indication configuration. For example, the network configures the frequency domain position of LP-WUS, the bandwidth parameter, the period, the time slot offset, the number of symbols, and the position of the associated bit information of the UE in LP-WUS for the UE through the second indication RRC signaling; during the effective period of this RRC signaling, that is, during the period when it is not reconfigured or deleted, the UE always detects LP-WUS on the relevant LP-WUS detection opportunities.

[0035] On the other hand, the UE determines the detection of LP-WUS according to the second and third indications, including determining the validity duration of LP-WUS detection and determining whether to perform LP-WUS detection on the LP-WUS detection opportunities within the time domain range related to the relevant validity duration according to the third indication.

[0036] Optionally, determining the active period includes determining the starting frame number, slot number, and length of the active period. For example, the UE can determine that the starting slot of the active period is the radio frame number n that satisfies the following formula f and the slot number

[0037]

[0038] where is the number of slots in a radio frame, T offset is the slot offset parameter of LP-WUS, T WUS is the number of slots in the LP-WUS transmission period, for example, it can be determined according to the parameters in the second indication. N is a positive integer used to determine the length of the active period, for example, it can be determined according to the parameters in the first indication. Correspondingly, the length of an active period is NT WUS slot number. mod is the modulo operation.

[0039] Another example, the UE can determine that the starting slot of the active period is the radio frame number n that satisfies the following formula f and the slot number

[0040]

[0041] where is the number of slots in a radio frame, T offset is the slot offset number of this active period, T duration is the number of slots in the active period length, for example, it can be determined according to the parameters in the first indication. mod is the modulo operation.

[0042] Another example, the UE can determine that the starting slot of the active period is the radio frame number n that satisfies the following formula f and the slot number

[0043]

[0044] where is the number of slots in a radio frame, is the number of slots in a subframe, T offset is the slot offset number of this active period, T auration is the time of the active period length, in milliseconds, for example, it can be determined according to the parameters in the first indication. mod is the modulo operation.

[0045] In the above various methods, μ used in calculating the relevant slot numbers is a parameter corresponding to the SCS (subcarrier spacing) of the bandwidth. For example, μ is determined in one of the following ways:

[0046] ·Determined by the SCS used by the LP-WUS's occupied bandwidth

[0047] ·Determined by the minimum SCS of the activated downlink BWP of all carriers of the UE

[0048] Optionally, the UE determines whether to perform LP-WUS detection on the LP-WUS detection opportunities within the relevant time domain range during the relevant active period according to the third indication, including determining LP-WUS detection on the LP-WUS detection opportunities during the active period corresponding to the time slot where the third indication is received and / or the adjacent next active period.

[0049] Optionally, the UE determines LP-WUS detection on the LP-WUS detection opportunities during the adjacent next active period according to the third indication. For example, the network sends an LP-WUS enabling command through MAC-CE. After receiving this command, the UE performs detection on each LP-WUS detection opportunity within the next active period located in the active period where this command is located, and determines whether to perform PDCCH detection according to the received WUS information. Similarly, the network sends an LP-WUS disabling command through MAC-CE. After receiving this command, the UE does not detect LP-WUS within this next active period, and does not need to determine whether to perform PDCCH detection according to the indication of WUS (for example, it can directly perform PDCCH detection according to the PDCCH configuration).

[0050] Another example, the network uses a partial bit field in DCI as the third indication to indicate whether the UE performs detection on each WUS detection opportunity during the next active period of the active period where this DCI is located. For example, in the bit field of DCI, bit 1 is used to indicate that the UE performs detection on each WUS detection opportunity within this next active period, and determines whether to perform PDCCH detection according to the WUS detection; bit 0 is used to indicate that WUS is not detected within this next active period, and the UE does not need to determine whether to perform PDCCH detection according to the indication of WUS.

[0051] Optionally, the UE may determine the detection of LP-WUS from the start of the current time slot or the consecutive next time slot of the current time slot to the end of the next active period according to the third indication. The current time slot is the time slot of the PDCCH for the DCI in which the UE receives the third indication or the PDCCH for scheduling the PDSCH (MAC-CE) carrying the third piece of information. For example, the network sends an LP-WUS enabling command through MAC-CE. After receiving the command, the UE performs detection on each WUS detection opportunity from the current time slot to the next active period, and determines whether to perform PDCCH detection based on the detection of WUS. Similarly, MAC-CE sends a WUS disabling command. After receiving this information, the UE does not detect WUS in the next active period starting from the current time slot, and does not need to perform PDCCH detection according to the indication of WUS (for example, it can directly perform PDCCH detection according to the PDCCH configuration).

[0052] Here, an active period may contain several time slots. Therefore, the UE may receive multiple third indication messages within the same active period, and the UE does not expect these third indication messages to indicate different LP-WUS detection indication messages.

[0053] Optionally, the enabling command used to indicate LP-WUS detection in the third indication information may also use one or more bits of information. For example, an enabling command contains 2 bits. The first bit is used to indicate whether the UE detects LP-WUS in the next active period, and the second bit is used to indicate whether the UE detects LP-WUS in the current active period.

[0054] Optionally, when the UE determines the detection of LP-WUS according to the second and third pieces of information, if the UE does not receive any third indication message in an active period, the UE determines not to detect LP-WUS in the next adjacent active period, and does not need to determine whether to perform PDCCH detection according to the indication of WUS (for example, it can directly perform PDCCH detection according to the PDCCH configuration).

[0055] Optionally, when the UE determines the detection of LP-WUS according to the second and third pieces of information, if the UE does not receive any third indication message in an active period, the UE determines not to detect LP-WUS in the next adjacent active period, and does not need to perform PDCCH detection according to the indication of WUS (for example, directly perform PDCCH detection according to the PDCCH configuration).

[0056] Optionally, the UE's PDCCH detection based on WUS includes any one of the PDCCHs scrambled with the following RNTIs for CRC:

[0057] -C-RNTI, CI-RNTI, CS-RNTI, INT-RNTI, SFI-RNTI, SP-CSI-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI, TPC-SRS-RNTI, AI-RNTI, SL-RNTI, SL-CS-RNTI.

[0058] Optionally, the third information may further include an indication information position associated with the indication information indicating the transmission of LP-WUS by the UE during the valid period. Since a WUS signal may carry indication information of multiple UEs, when different UEs use the same WUS opportunity and the obtained indication information contains information of multiple users, the UE needs to find the associated indication information corresponding to this UE from it, such as the starting sequence number in the entire information block. For example, a WUS can carry 24 bits of valid information, and 2 bits of it are used for the associated indication information of a certain user. Then the network needs to indicate the starting position of these 2 bits of information in these 24 bits. The bit size required for the UE to determine the position of this associated bit information is ceil(log2(N / M)). Where N is the size of the total valid information in the WUS, and M is the size of the valid information used to indicate one UE.

[0059] When the network configures multiple sets of LP-WUS resources for the UE, the UE also determines the corresponding valid periods according to these multiple sets of LP-WUS resources, and the detection of multiple sets of LP-WUS during the valid periods. Optionally, determining the valid period includes determining the starting frame number, time slot number and length of the valid period. For example, the UE can determine that the starting time slot of the valid period is the radio frame number n that satisfies the following formula f and the time slot number

[0060]

[0061] where is the number of time slots in a radio frame, T offset is the time slot offset parameter of LP-WUS, T WUS，max is the number of time slots of the maximum value of the transmission periods of multiple sets of LP-WUS, which can be determined according to the parameters in the second indication, for example. N is a positive integer used to determine the length of the valid period, which can be determined according to the parameters in the first indication, for example. Correspondingly, the length of a valid period is NT WUS，max time slots.

[0062] Optionally, the third indication information includes information indicating the detection of multiple LP-WUSs. The network may configure multiple LP-WUSs with different cycle, offset, and other parameters for the UE, and use the third indication information to respectively indicate the detection of these LP-WUSs. For example, N-bit groups are used to respectively indicate the detection of N LP-WUSs. The UE can respectively correspond to the detection of different LP-WUSs according to the foregoing method for indicating the detection of one LP-WUS.

[0063]

Embodiment 2

[0064] In the NR network, the base station can configure DRX (Discontinuous Reception) for the user equipment in the RRC_CONNECTED state, which is used to indicate that the UE only enters the active state at certain times for relevant PDCCH detection. The DRX configuration includes several parameters, for example, the DRX cycle period (drx-LongCycle), the DRX slot offset (drx-SlotOffset), the DRX on-duration timer (drx-onDurationTimer), and so on.

[0065] The UE can determine an on-duration according to the DRX configuration, that is, the UE enters the active time at the start time of the on-duration and starts to detect the PDCCH; in the time slots outside the on-duration and when no relevant timer is running, the UE can not detect the PDCCH to reduce power consumption. The UE can enter the on-duration periodically according to the configured DRX cycle parameter. Once a PDCCH is successfully detected during the on-duration, the UE starts a timer Inactivity-timer. During the running of this timer, the UE remains active. When the UE receives a PDCCH related to a first transmission (new transmission), the UE can restart the timer Inactivity-timer. In addition, when the UE is waiting for possible retransmissions, the UE can start the corresponding retransmission timer drx-RetransmissionTimerDL or drx-RetransmissionTimerUL according to the downlink transmission or uplink transmission. During the running of these retransmission timers, the UE also remains active to detect possible retransmission scheduling. The UE may also remain active in some other scenarios.

[0066] When DRX is configured, the active time of the UE includes:

[0067] - When the drx-onDurationTimer or drx-InactivityTimer of the DRX group corresponding to the cell is running.

[0068] - When drx-RetransmissionTimerDL or drx-RetransmissionTimerUL is running on any cell of the DRX group.

[0069] - When the UE's random access timer ra-ContentionResolutionTimer or msgB-ResponseWindow is running

[0070] - When the UE sends a Scheduling Request (SR) through PUCCH and suspends.

[0071] - When a RAR (random access response) is successfully received and a new transmission PDCCH of the C-RNTI of this MAC entity has not been received; the RAR is triggered by a random access preamble, and the preamble is not selected by the MAC entity from the contention-based random access (CBRA) preamble.

[0072] For better adaptation to services, the network can also configure a short DRX cycle for this DRX, using a cycle shorter than the long DRX cycle configured above, and the two cycles use the same drx-onDurationTimer size. The two cycles can be converted to each other according to certain rules and commands, and only one cycle can be applied at a time.

[0073] In NR, the UE can also perform uplink PUSCH or downlink PDSCH transmission on the predetermined resources according to the parameters configured by the higher layer, which are correspondingly called configured uplink grants and configured downlink assignment.

[0074] If the MAC PDU is received on a unicast configured downlink assignment and downlink HARQ feedback is not configured as disabled (downlinkHARQ-FeedbackDisabled) for the downlink transmission, the UE starts the timer drx-HARQ-RTT-TimerDL for the corresponding HARQ process starting from the first symbol after the relevant DL HARQ feedback, and stops the drx-RetransmissionTimerDL.

[0075] If a MAC PDU is transmitted on a configured uplink grant, the UE starts the timer drx-HARQ-RTT-TimerUL for the corresponding HARQ process starting from the first symbol after the end of the first transmission of the PUSCH, and stops the drx-RetransmissionTimerUL.

[0076] When the UE receives a DRX command MAC-CE associated with a PDCCH related to a C-RNTI or CS-RNTI or a long DRX command MAC CE, the UE stops the drx-onDurationTimer and the drx-InactivityTimer for each DRX group. Additionally, if the drx-InactivityTimer expires and a DRX Short cycle is configured, the UE starts or restarts the drx-ShortCycleTimer starting from the first symbol after the drx-InactivityTimer expires and applies the Short DRX cycle. Otherwise, the UE applies the long DRX cycle.

[0077] If the UE receives a DRX command MAC-CE associated with a PDCCH related to a C-RNTI or CS-RNTI or a unicast configured downlink assignment (configured downlink assignment), and if a Short DRX cycle is configured, the UE starts or restarts the drx-ShortCycleTimer starting from the first symbol after receiving the DRX command MAC CE and applies the Short DRX cycle; otherwise (i.e., if a Short DRX cycle is not configured), the UE applies the long DRX cycle.

[0078] If the UE receives a Long DRX Command MAC CE, the UE stops the drx-ShortCycleTimer and applies the Long DRX cycle.

[0079] Since the LP-WUS is used to wake up the UE for PDCCH detection by the MR, if the UE is already in the active state or in the dormant state waiting for the timer to expire and enter the active state, or if the UE only sleeps for a short period of time, performing the corresponding WUS detection in this case will cause frequent UE state transitions, resulting in power consumption losses.

[0080] In an optional embodiment, when the UE is configured with DRX, when one of the following conditions exists, the LP-WUS is not detected on the relevant time slot:

[0081] · During the active time

[0082] · During the application of the DRX short cycle Drx-shortcycle

[0083] · During the operation of the drx-HARQ-RTT-TimerUL

[0084] · During the operation of the drx-HARQ-RTT-TimerDL

[0085] In an optional embodiment, when the UE is configured with DRX, when the following conditions are met simultaneously, the LP-WUS can be detected on the relevant time slot:

[0086] · Not during the active time

[0087] · Applying the DRX long cycle Drx-longcycle

[0088] · The drx-HARQ-RTT-TimerUL is not running

[0089] · The drx-HARQ-RTT-TimerDL is not running

[0090] Optionally, when the UE is configured with DRX and the UE supports non-terrestrial network (NTN) services, when one of the following conditions exists, the LP-WUS is not detected on the relevant time slot:

[0091] · During the operation of the HARQ-RTT-TimerUL-NTN

[0092] · During the operation of the HARQ-RTT-TimerDL-NTN

[0093] Optionally, when the UE is configured with DRX and supports sidelink services, when one of the following conditions exists, LP-WUS is not detected in the relevant time slots:

[0094] · During the operation of drx-HARQ-RTT-TimerSL

[0095] · During the operation of drx-HARQ-RTT-TimerDL

[0096] Optional embodiment, when the UE is not configured with DRX, when one of the following conditions exists, LP-WUS is not detected in the relevant time slots:

[0097] - The random access timer ra-ContentionResolutionTimer or msgB-ResponseWindow of the UE is running.

[0098] - When the UE sends a scheduling request (SR) through PUCCH and is suspended.

[0099] - When a random access response (RAR) is successfully received and a new transmission PDCCH of the C-RNTI of this MAC entity has not been received; the RAR is triggered by a random access preamble, and the preamble is not selected by the MAC entity from the contention-based random access (CBRA) preamble.

[0100] In another aspect, the LP-WUS detection and judgment in this embodiment can be combined with other embodiments. For example, according to Embodiment 1, when the UE determines to detect WUS during a valid period, and according to this embodiment, it is determined that WUS is not detected in several time slots or symbols of this valid period, then the UE can detect WUS during this valid period and on the WUS detection opportunities that do not overlap with the time slots or symbols determined by this embodiment. Similarly, according to Embodiment 1, when the UE determines not to detect WUS during a valid period, and according to this embodiment, it is determined that WUS is not detected in several time slots or symbols of this valid period, then the UE can not detect WUS during this valid period.

[0101]

Embodiment 3

[0102] When detecting LP-WUS, the UE may also determine by itself whether it can receive a valid WUS according to a certain method, and instruct the physical layer to perform relevant detections. For example, it can measure the received quality (reference signal received power, RSRP) of the LP-SS (low power synchronization signal) on the same bandwidth as the LP-WUS, or measure the received quality (SS-RSRP) of the SSS signal in the SSB on the same bandwidth or different bandwidths as the LP-WUS, etc. At this time, a LP-WUS detection timer can be configured for the UE through high-layer signaling, and the base station and the terminal can synchronize the LP-WUS detection status through this timer, so as to avoid resource waste caused by the network side still sending when the UE no longer detects LP-WUS.

[0103] In an alternative embodiment, if the UE is configured with a LP-WUS detection timer by the base station, when one of the following conditions is met, the MAC entity shall start or restart the timer:

[0104] · Detect a valid WUS wake-up indication message

[0105] · Detect that the RSRP of the LP-SS is higher than a predetermined or configured threshold

[0106] · Detect that the SS-RSRP is higher than a predetermined or configured threshold

[0107] If the LP-WUS detection timer expires and the LP-WUS detection status is active, the UE can perform the following steps:

[0108] · Set the LP-WUS detection status to inactive

[0109] · Send a LP-WUS detection failure indication to the gNB

[0110] When receiving a LP-WUS detection enable command (for example, receiving the parameters of LP-WUS configured by the high layer), and a LP-WUS detection timer is configured and the timer has not expired, the UE can perform the following steps:

[0111] · If the UE is configured with DCP, the UE does not perform DCP detection;

[0112] · Set the LP-WUS detection status to active and instruct the physical layer to perform LP-WUS detection

[0113] When receiving a LP-WUS detection disable command, the UE performs the following steps:

[0114] · If the UE is configured with DCP, the UE performs DCP detection;

[0115] · Set the LP-WUS detection status to inactive

[0116] If the UE is configured with DRX, and the LP-WUS detection status is active, and it is not in the active time of DRX, apply the long DRX cycle. The UE determines to detect LP-WUS on the cells of the DRX group, and instructs the physical layer to perform the detection of LP-WUS;

[0117] If the UE is not configured with DRX, and the LP-WUS detection status is active, the UE instructs the physical layer to perform the detection of LP-WUS.

[0118] Next, use Figure 2 to illustrate the user equipment that can execute the method performed by the user equipment described in detail above according to an embodiment of the present invention.

[0119] Figure 2 is a block diagram showing the user equipment UE involved in the present invention.

[0120] As Figure 2 shown, the user equipment UE200 includes a processor 201 and a memory 202. The processor 201 may include, for example, a microprocessor, a microcontroller, an embedded processor, etc. The memory 202 may include, for example, a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memories, etc. Program instructions are stored on the memory 202. When the instructions are run by the processor 201, the above methods performed by the user equipment described in detail in the present invention can be executed.

[0121] The methods and related devices of the present invention have been described above in conjunction with preferred embodiments. Those skilled in the art can understand that the methods shown above are only exemplary, and the above-described embodiments can be combined with each other without conflict. In addition, the methods of the present invention are not limited to the steps and sequences shown above, and the relevant steps can be exchanged or adjusted without affecting the actual function. The network nodes and user equipment shown in the specification may include more modules, for example, may also include modules that can be developed or will be developed for base stations, MMEs, or UEs, etc. The various identifiers shown above are only exemplary and not restrictive. The present invention is not limited to the specific cells as examples of these identifiers, and those skilled in the art can make many changes and modifications according to the teachings of the shown embodiments.

[0122] It should be understood that the above embodiments of the present invention can be implemented by software, hardware, or a combination of both. For example, various components inside the base station and user equipment in the above embodiments can be implemented by a variety of devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processors, application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), complex programmable logic devices (CPLDs), and so on.

[0123] In addition, the embodiments of the present invention disclosed herein can be implemented on a computer program product. More specifically, the computer program product is a product with a computer-readable medium encoded with computer program logic, which, when executed on a computing device, provides related operations to implement the above technical solutions of the present invention. When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present invention. Such a setting of the present invention is typically provided as software, code, and / or other data structures set or encoded on a computer-readable medium such as an optical medium (e.g., CD-ROM), a floppy disk, or a hard disk, or other media such as firmware or microcode on one or more ROMs or RAMs or PROM chips, or a downloadable software image, a shared database, etc. in one or more modules. The software or firmware or such a configuration can be installed on a computing device so that one or more processors in the computing device perform the technical solutions described in the embodiments of the present invention.

[0124] In addition, each functional module or each feature of the base station device and user equipment used in each of the above embodiments can be implemented or executed by a circuit, and the circuit is usually one or more integrated circuits. The circuit designed to perform the various functions described in this specification may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), or a general integrated circuit, a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above devices. The general-purpose processor can be a microprocessor, or the processor can be an existing processor, controller, microcontroller, or state machine. The above general-purpose processor or each circuit can be configured by digital circuits or can be configured by logic circuits. In addition, when advanced technologies capable of replacing current integrated circuits emerge due to the progress of semiconductor technology, the present invention can also use integrated circuits obtained using such advanced technologies.

[0125] Although the present invention has been shown above in connection with preferred embodiments thereof, those skilled in the art will understand that various modifications, substitutions and changes can be made to the present invention without departing from the spirit and scope of the present invention. Therefore, the present invention should not be limited by the above embodiments, but should be defined by the appended claims and their equivalents.

Claims

1. A method performed by a user equipment UE, comprising: The UE receives an indication about a wake-up signal LP-WUS from a network, the indication including at least the second indication and the third indication among a first indication, a second indication, and a third indication, where the first indication is used to indicate that the UE detects the LP-WUS according to the second indication or the second indication and the third indication, the second indication contains configuration parameters of the LP-WUS, and the third indication is used to indicate whether the UE detects the LP-WUS within a time domain range determined by the first indication and / or the second indication; The UE determines, based on the indication, whether to detect the LP-WUS according to the second indication or according to the second indication and the third indication; and When the UE detects the LP-WUS, it determines, according to the indication of the LP-WUS, whether a primary receiver MR needs to detect a PDCCH on a relevant PDCCH opportunity.

2. The method according to claim 1, wherein The UE detecting the LP-WUS according to the second indication and the third indication includes determining a time domain range for detecting the LP-WUS, determining an effective period for detecting the LP-WUS according to the first indication and / or the second indication as the time domain range, and determining whether to detect the LP-WUS on an LP-WUS detection opportunity within the time domain range related to the effective period according to the third indication.

3. The method according to claim 2, wherein The UE determines that the starting time slot of the valid period is the radio frame number nf and the time slot number that satisfy the following formula Wherein, is the number of time slots in a wireless frame, T offset is the time slot offset parameter of LP-WUS, T WUS is the number of time slots of the LP-WUS transmission period, N is a positive integer, used to determine the length of the active period.

4. The method according to claim 2, wherein The UE determines that the starting time slot of the valid period is the radio frame number n that satisfies the following formula f and the time slot number Among them, is the number of time slots in a radio frame, T offset is the number of time slot offsets during the valid period, T duration is the number of time slots of the valid period length.

5. The method according to claim 2, wherein The UE determining whether to detect the LP-WUS on an LP-WUS detection opportunity within the time domain range related to the effective period according to the third indication includes: determining the LP-WUS detection on an LP-WUS detection opportunity within the effective period corresponding to the time slot in which the third indication is received and / or an adjacent next effective period according to an enable command for indicating LP-WUS detection in a MAC-CE received from the network, or according to an indication in a bit field in a DCI received from the network.

6. The method according to claim 1, wherein The UE determines corresponding effective periods according to multiple sets of LP-WUS resources configured by the network, and determines the detection of multiple sets of LP-WUS during the effective periods.

7. The method according to claim 1, wherein When the UE is configured with DRX, When one of the following conditions exists, it does not detect the LP-WUS on a relevant time slot: During the active time period; During the application of the DRX short cycle period; During the operation of the timer drx-HARQ-RTT-TimerUL; During the operation of the timer drx-HARQ-RTT-TimerDL, When the following conditions are simultaneously satisfied, it can detect the LP-WUS on a relevant time slot: Not during the active time period; During the application of the DRX long cycle period; The timer drx-HARQ-RTT-TimerUL is not running; The timer drx-HARQ-RTT-TimerDL is not running.

8. The method according to claim 1, wherein when the UE is configured with DRX and supports NTN network services, and when one of the following conditions exists, the UE does not detect LP-WUS on the relevant time slot: during the running of the timer HARQ-RTT-TimerUL-NTN; during the running of the timer HARQ-RTT-TimerDL-NTN; when the UE is configured with DRX and supports sidelink services, and when one of the following conditions exists, the UE does not detect LP-WUS on the relevant time slot: during the running of the timer drx-HARQ-RTT-TimerSL; during the running of the timer drx-HARQ-RTT-TimerDL.

9. The method according to claim 1, wherein when the UE is not configured with DRX, and when one of the following conditions exists, the UE does not detect LP-WUS on the relevant time slot: the random access timer ra-ContentionResolutionTimer or msgB-ResponseWindow of the UE is running; when the UE sends a scheduling request through PUCCH and is suspended; when a random access response RAR is successfully received and a new transmission PDCCH of the C-RNTI of the MAC entity has not been received; the RAR is triggered by a random access preamble, and the preamble is not selected by the MAC entity from the contention-based random access CBRA preambles.

10. A user equipment, comprising: a processor; and a memory storing instructions, wherein the instructions, when run by the processor, execute the method according to any one of claims 1 to 9.

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