System and method for wake-up signal design to facilitate ultra-low power reception

Abstract

According to an embodiment, a user equipment (UE) receives one or more configurations from a base station using a first radio of the UE. The one or more configurations indicate allocation of resources for wakeup signal, WUS transmission, and the one or more configurations indicate allocation of resources for wakeup signal, WUS transmission. When the first radio of the UE is in a sleep power state, the UE detects a WUS in the resource using a second radio of the UE. The UE performs a wake-up procedure with the base station using the first radio.

Description

[0001] Priority claims and cross-references to related applications

[0002] This patent application claims priority to U.S. Provisional Application No. 63 / 389,227, filed on July 14, 2022, entitled “System and Method for Wakeup Signal Design to Facilitate Ultra-Low Power Reception,” the entire contents of which are incorporated herein by reference as if reproduced in full. Technical Field

[0003] The present invention relates generally to wireless communications and, in particular embodiments, to techniques and mechanisms for wake-up signal design to facilitate ultra-low power reception. Background Art

[0004] To reduce power consumption in devices (e.g., Internet of Things (IoT) devices), it is helpful to put the device into deep sleep as much as possible when the device is idle, so that the device can wake up when needed to receive and send information. During deep sleep, the device can monitor some type of wake-up signal (WUS) instead of paging early indication (PEI) with the lowest possible power consumption. Summary of the invention

[0005] The embodiments of the present invention describe a method and apparatus for wake-up signal design to facilitate ultra-low power reception, and technical advantages are generally achieved through the embodiments of the present invention.

[0006] According to an embodiment, a UE receives one or more configurations from a base station using a first radio of the UE. The one or more configurations indicate resources allocated for wakeup signal (WUS) transmission. When the first radio of the UE is in a sleep power state, the UE detects the WUS in the resources using a second radio of the UE. The UE performs a wakeup procedure with the base station using the first radio.

[0007] In some embodiments, after receiving the one or more configurations, the UE may configure a second radio of the UE based on the one or more configurations. To allow the UE to configure the second radio, a controller internal or external to the first radio may configure the second radio based on the one or more configurations. In one embodiment, the first radio may forward the one or more configurations to the second radio. The first radio of the UE may transition to a sleep power state. After detecting the WUS, the second radio of the UE may wake up the first radio of the UE.

[0008] In some embodiments, the resources may include one or more WUS resource blocks (WUS resource blocks, WU-RBs). One or more configurations may indicate the frequency position, duration, starting position, and period of the WUS. One or more WU-RBs may be located in a WUS bandwidth part (WUS bandwidth part, WUS-BWP). The first number of subcarriers carrying the WUS may be based on the second number of one or more WU-RBs and a unilateral portion of the bandwidth for the bandpass filter band roll-off.

[0009] In some embodiments, one or more configurations may also indicate at least one of a bit-level repetition number or a block-level repetition number of the WUS.

[0010] In some embodiments, one or more configurations may also indicate a subcarrier spacing (SCS) of the WUS in the carrier. The SCS may be different from a second SCS used for data and control signal transmission in the carrier. The SCS may be one of 60kHz, 120kHz, 240kHz, 480kHz, or 960kHz, and the resource is in frequency range 1 (FR1).

[0011] In some embodiments, the WUS may be modulated by on-off keying (OOK). One or more configurations may indicate one or more sequences for shaping the on waveform of the WUS. The one or more sequences may be cell-specific or receiver-specific. The one or more sequences may be one or more Zadoff-Chu (ZC) sequences.

[0012] In some embodiments, one or more configurations may be carried in a radio resource control (RRC) message or a system information block (SIB).

[0013] In some embodiments, the UE may use the first radio to send a configuration confirmation confirming one or more configurations.

[0014] In some embodiments, the UE may communicate with the base station using the first radio in response to the wake-up procedure.

[0015] In some embodiments, the first radio may be a primary radio of the UE.The second radio may be a wake-up receiver (WUR) of the UE.

[0016] According to an embodiment, a base station sends one or more configurations to a first radio of a user equipment (UE). The one or more configurations indicate resources allocated for wake-up signal (WUS) transmission. When the first radio of the UE is in a sleep power state, the base station sends the WUS to a second radio of the UE in the resources. The base station performs a wake-up procedure with the first radio of the UE.

[0017] In some embodiments, the resources may include one or more WUS resource blocks (WU-RBs). One or more configurations may indicate the frequency location, duration, starting location, and period of the WUS. One or more WU-RBs may be located in a WUS bandwidth part (WUS-BWP). The first number of subcarriers carrying the WUS may be based on a second number of one or more WU-RBs and a single-sided portion of the bandwidth for the bandpass filter band roll-off.

[0018] In some embodiments, one or more configurations may also indicate at least one of a bit-level repetition number or a block-level repetition number of the WUS.

[0019] In some embodiments, one or more configurations may also indicate a subcarrier spacing (SCS) of the WUS in the carrier. The SCS may be different from a second SCS used for data and control signal transmission in the carrier. The SCS may be one of 60kHz, 120kHz, 240kHz, 480kHz, or 960kHz, and the resource is within frequency band range 1 (FR1).

[0020] In some embodiments, the WUS may be modulated by on-off keying (OOK). One or more configurations may indicate one or more sequences for shaping the on waveform of the WUS. One or more sequences may be cell-specific or receiver-specific. One or more sequences may be one or more Zadoff-Chu (ZC) sequences.

[0021] In some embodiments, one or more configurations may be carried in a radio resource control (RRC) message or a system information block (SIB).

[0022] In some embodiments, the base station may receive a configuration confirmation from the first radio of the UE confirming one or more configurations.

[0023] In some embodiments, the base station may communicate with the first radio of the UE in response to the wake-up procedure.

[0024] In some embodiments, the first radio may be a primary radio of the UE.The second radio may be a wake-up receiver (WUR) of the UE. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more fully understand the present invention and its advantages, reference is made to the following description in conjunction with the accompanying drawings. In the accompanying drawings,

[0026] Figure 1A An exemplary communication system 100 provided by some embodiments is shown;

[0027] Figure 1B An example of a wake-up receiver (WUR) for receiving an OOK modulated WUS provided by some embodiments is shown;

[0028] Figure 2 An exemplary WUS-RB 200 provided by some embodiments is shown;

[0029] Figure 3 An exemplary block diagram of a transmitter provided by some embodiments is shown;

[0030] Figure 4 shows exemplary basic sequences provided by some embodiments;

[0031] Figure 5 shows exemplary basic sequences provided by some embodiments;

[0032] Figure 6 shows exemplary basic sequences provided by some embodiments;

[0033] Figure 7 shows exemplary basic sequences provided by some embodiments;

[0034] Figure 8 shows bit block repetition provided by some embodiments;

[0035] Fig. 9 An example of coded bit-level repetition provided by some embodiments is shown;

[0036] Fig.10 An example of coded bit-level repetition provided by some embodiments is shown;

[0037] Fig.11 An exemplary flow chart for WUS configuration, transmission and reception provided by some embodiments is shown;

[0038] Fig. 12AA flowchart of a method performed by a UE provided in some embodiments is shown;

[0039] Fig. 12B A flowchart of a method performed by a base station provided in some embodiments is shown;

[0040] Fig.13 An embodiment communication system is shown;

[0041] Fig.14A and Fig. 14B Exemplary devices that can implement the methods and guidance provided by the present invention are shown;

[0042] Fig.15 A block diagram of a computing system provided by some embodiments that can be used to implement the devices and methods disclosed herein is shown;

[0043] FIG. 16A to FIG. 16E The wake-up signal evaluation results are shown.

[0044] Corresponding numerals and symbols in the different figures generally refer to corresponding parts unless otherwise indicated.The figures are drawn to clearly illustrate the relevant aspects of the various embodiments and are not necessarily drawn to scale. DETAILED DESCRIPTION

[0045] The formation and use of embodiments of the present invention are discussed in detail below. However, it should be understood that the concepts disclosed herein can be embodied in a variety of specific contexts, and the specific embodiments discussed herein are merely illustrative and are not intended to limit the scope of the claims. In addition, it should be understood that various changes, substitutions and modifications may be made without departing from the spirit and scope of the present invention as defined by the appended claims.

[0046] Figure 1A An exemplary communication system 100 provided by an embodiment is shown; the communication system 100 includes an access node 110 having a coverage area 101. The access node 110 serves user equipment (UE), such as UE 120. In a first operating mode, communications to and from the UE pass through the access node 110 having the coverage area 101. The access node 110 is connected to a backhaul network 115 in order to connect to the Internet and perform work and management, etc. In a second operating mode, communications to and from the UE do not pass through the access node 110, however, the access node 110 typically allocates resources to the UE for communication when specific conditions are met. Communications between a pair of UEs 120 may use a sidelink connection (shown as two separate unidirectional connections 125). In Figure 1AIn , sidelink communication occurs between two UEs operating within coverage area 101. However, sidelink communication typically occurs when both UEs 120 are outside coverage area 101, both are within coverage area 101, or one is within coverage area 101 and the other is outside coverage area 101. Communication between a pair of UEs and access nodes occurs over unidirectional communication links, where the communication link from the UE to the access node is referred to as an uplink 130 and the communication link from the access node to the UE is referred to as a downlink 135.

[0047] Access nodes may also be generally referred to as Node B, evolved NodeB (eNB), next generation (NG) base station (NG NodeB, gNB), master eNB (MeNB), secondary eNB (SeNB), master gNB (MgNB), secondary gNB (SgNB), network controller, control node, base station, access point, transmission point (TP), transmission-reception point (TRP), cell, carrier, macro cell, femto cell, pico cell, etc., and UE may also be generally referred to as mobile station, mobile phone, terminal, user, subscriber, site, etc. The access node may provide wireless access according to one or more wireless communication protocols such as 3GPP (3rd Generation Partnership Project) long term evolution (LTE), LTE-A (LTE-A), 5G, 5G LTE, 5G NR, sixth generation (6G), High Speed ​​Packet Access (HSPA), IEEE 802.11 series standards such as 802.11a / b / g / n / ac / ad / ax / ay / be, etc. Although it is understood that the communication system may use multiple access nodes capable of communicating with multiple UEs, for simplicity, only one access node and two UEs are shown.

[0048] 5G systems are designed and developed for mobile phones and vertical use cases. In addition to latency, reliability, and availability, UE energy efficiency is also critical to 5G. Currently, 5G devices may need to be charged weekly or daily, depending on the individual's usage time. Generally speaking, 5G devices consume tens of milliwatts in RRC idle / inactive state and hundreds of milliwatts in RRC connected state. To improve energy efficiency and improve user experience, designs that extend battery life are required. Devices that support sleep power states can be more energy-efficient. Sleep power states can include sleep states defined in current standard discussions, such as "light sleep", "micro sleep", "deep sleep", and "ultra-deep sleep". Each state means that the UE turns off certain components (e.g., hardware subsystems in the UE). Table 1 below shows the on / off states of the components corresponding to the deep sleep, light sleep, and micro sleep states. In the ultra-deep sleep state, all components listed in Table 1 are turned off. These sleep states consume less energy. For example, the power consumption of a device in the deep sleep state is less than 1*3 milliwatts, and the power consumption of a device in the ultra-deep sleep state is less than 0.015*3 milliwatts.

[0049]

[0050] Table 1

[0051] Energy efficiency is more ideal for UEs that do not have a continuous energy source (e.g., UEs using small rechargeable batteries and single button batteries). In vertical use cases, sensors and actuators are widely deployed for monitoring, measurement and / or charging, etc. Typically, the batteries of sensors and actuators are non-rechargeable and are expected to last for at least a few years. Wearable devices include smart watches, rings, eHealth-related devices, and medical monitoring devices. It is technically challenging for wearable devices to last up to 1 to 2 weeks at typical battery capacities.

[0052] The power consumption of the device depends on the length of the configured wake-up cycle (e.g., paging cycle). In order to meet the above battery life requirements, it is expected that extended discontinuous reception (eDRX) cycles with large cycle duration values ​​will be used, which will result in high latency and is not suitable for services that require both long battery life and low latency. For example, in a fire detection and fire extinguishing use case, the actuator should close the fire shutter and turn on the fire sprinkler within 1 to 2 seconds from the time the sensor detects the fire; the long eDRX cycle cannot meet the latency requirements. eDRX is obviously not suitable for use cases with strict latency requirements. Therefore, the goal is to study ultra-low power consumption mechanisms that can support the low latency in Rel-18 (e.g., lower than the eDRX latency).

[0053] Currently, the UE needs to wake up regularly once per DRX cycle, which accounts for most of the power consumption during periods without signaling or data traffic. If the UE can wake up only when the UE is triggered (e.g., paging), the power consumption can be significantly reduced. This can be achieved by using the wake-up signal to trigger the main radio and a separate receiver (e.g., a wake-up receiver) that can monitor the wake-up signal with ultra-low power consumption. The main radio is used for transmission and reception of data / control channels and can be turned off or set to deep sleep, except when it is turned on.

[0054] The power consumption of monitoring wake-up signals depends on the wake-up signal design and the hardware blocks of the wake-up receiver (WUR) used for signal detection and processing.

[0055] Low-power WUS / WUR can be targeted for power-sensitive, small form factor devices including IoT use cases (e.g., industrial sensors, controllers) and wearables. Other use cases (e.g., XR / smart glasses, smartphones) are not excluded.

[0056] Completely different from the work on UE power saving in previous releases, there is no need to use existing signals as WUS. All WUS schemes identified are able to operate in cells supporting legacy UEs. These schemes can achieve significant gains compared to existing Rel-15 / 16 / 17 UE power saving mechanisms. Other aspects such as detection performance, coverage, UE complexity, etc. can be covered.

[0057] In machine-type communication (MTC), an MTC wake-up signal (MWUS) is specified to help receivers avoid wasting power when trying to decode the MTC physical downlink control channel (MPDCCH). MPDCCH decoding can be performed only when MWUS is detected, thereby reducing power consumption. The targeted MWUS receiver is based on sequence correlation detection, which means that normal receiver components (e.g., RF chain, digital baseband receiver, etc.) can still operate during the detection process. Therefore, the power consumption saved by MWUS is limited and cannot meet the ultra-low power consumption reduction requirements. In order to achieve ultra-low power consumption, passive circuit receivers are usually used in the RF front end. In this case, only energy detection can be performed in the RF front end. On-off keying (OOK) type modulation usually works well to generate signals for energy detection type receivers. The detection output is the input of a micro controller unit (MCU) for further digital domain processing. The processing result determines whether the wake-up signal is targeted at the receiver, and if it is indeed targeted at the receiver, the corresponding operation and process are performed. Figure 1BAn example of a wake-up receiver (WUR) 150 for receiving an OOK modulated WUS provided by some embodiments is shown. Figure 1B The exemplary WUR 150 in includes a bandpass filter 152 , a low noise amplifier 154 , an envelope detector 156 , a first low pass filter 158 , a second low pass filter 159 , a comparator 160 , and an MCU 162 .

[0058] In order to coexist with current 5G physical channels and signals, the network configures one or more bandwidth parts (BWP dedicated to the transmission of the wakeup signal, WUS-BWP) on one or more carriers. One or more carriers can be dedicated to WUS (i.e., only WUS-BWP can be configured on a carrier), or used by both WUS communications and non-WUS communications. Within an allocated WUS-BWP, a group of resource blocks (RBs) are grouped together to form time-frequency resources for sending wakeup signals. The group of RBs can be called a wakeup signal resource block (WUS-RB) or a wakeup signal resource range (WUS-RG). Figure 2 An exemplary WUS-RB 200 provided by some embodiments is shown. Figure 2 The WUS-RB 200 in the WUS-RB 200 can be composed of r consecutive RBs in the frequency domain and span t consecutive multiple time slots or orthogonal frequency-division multiplexing (OFDM) symbols in the time domain to form a large continuous time-frequency resource block. The WUS-RB 200 may include resources 202 that can be used as guard bands and guard intervals. The WUS-RB 200 carrying wake-up signals for different receivers (e.g., UEs, wireless sensors, and wearable devices) can be multiplexed in the frequency domain and time domain. The WUS-BWP configuration (including frequency position, duration, starting position, and period) and the WUS-RB allocation for wake-up transmission within the WUS-BWP can be indicated to the receiver of each UE via RRC.

[0059] The WUS-BWP configuration and the WUS-RB allocation within the BWP for sending the wake-up signal may also be predefined (eg, predefined according to the deployed frequency band). The targeted wake-up receiver may obtain the detailed configuration and allocation from the lookup table.

[0060] It is possible to support reducing restrictions on the subcarrier spacing (SCS) used within the WUS-BWP to facilitate the timely transmission of wake-up signals. For example, assuming that the network's deployment band is within frequency range 1 (FR1), according to the traditional solution, the possible SCS configurations are 15kHz and 30kHz. For WUS-BWP, more SCSs (for example, 60kHz, 120kHz, 240kHz, or even 480kHz and 960kHz) can also be used. The network can send a wake-up signal within the WUS-BWP according to the configured SCS, regardless of the deployed frequency band. For another example, if the network's deployment band is within frequency range 2 (FR2), according to the traditional solution, the possible SCS configurations are 60kHz, 120kHz, and 240kHz. For WUS-BWP, more SCSs (for example, 15kHz, 30kHz, or even 7.5kHz and 5kHz) can also be used.

[0061] Any SCS specified in the conventional scheme can be used for WUS-BWP, regardless of the frequency band the network operates in. The SCS used in WUS-BWP can be indicated to the wake-up receiver through RRC or predefined (for example, predefined according to the network operating frequency band).

[0062] Figure 3 An exemplary block diagram of a transmitter 300 provided by some embodiments is shown. Details of some blocks are provided in this disclosure.

[0063] Two parameters determine the subcarriers used to actually send the wake-up signal: (1) the number of RBs in the frequency domain along the WUS-RB; and (2) the roll-off factor at the band edge of the bandpass filter.

[0064] Assume that WUS-RB has r RBs in the frequency domain. In addition, assume that f BP In some embodiments, f BP It can be a single-side portion of the allocated bandwidth portion of the guard band in order to meet the bandpass filter roll-off requirement. Therefore, the number of subcarriers k used to carry the wake-up signal is:

[0065]

[0066] The k subcarriers used to actually send the wake-up signal occupy the middle subcarriers of the WUS-RB. In some exemplary embodiments described in the present invention, it can be assumed that the number of subcarriers per RB is 12. The number of subcarriers per RB can also have other values ​​(for example, 24 and 36, etc.).

[0067] In another embodiment, f BP It can be a fraction of the bandwidth carrying the wake-up signal. Therefore, the number of subcarriers k used to carry the wake-up signal is:

[0068]

[0069] In yet another embodiment, f BP It can be defined as the total fraction of the allocated bandwidth that is used as the guard band to meet the bandpass filter roll-off requirement. The number of subcarriers k used to carry the wake-up signal is:

[0070]

[0071] Assuming that the subcarrier indexes in the WUS-RB are 0, 1, 2, ..., 12r–1, the k subcarriers used to carry the wake-up signal are the subcarriers with the following indexes:

[0072]

[0073] The symbols sent on the k subcarriers may be modulated by binary phase-shift keying (BPSK) or quadrature phase shift keying (QPSK). The mapping from the bit sequence to the modulation symbol may reuse the same mapping performed on other reference signals (e.g., phase tracking reference signal (PTRS), demodulation reference signal (DMRS), etc.). The bit sequence may be a random sequence generated by specific initialization based on a combination of cell ID, UE ID, time slot, and OFDM symbol index, etc. An example is to reuse the latest DMRS sequence generation configuration indicated to the UE via a high-level message.

[0074] For detection algorithms based on the RF signal envelope energy, the peak to average power ratio (PAPR) can play an important role in the detection performance. In order to reduce the WUS PAPR, the network can consider sending a low PAPR symbol sequence on k subcarriers. An example is to send a Zadoff-Chu (ZC) sequence. ZC sequences are known for their correlation properties and constant amplitude. If the number of subcarriers k is not a prime number, where the prime number is a typical ZC sequence length used in the specification, the prime ZC sequence can be cyclically extended or truncated so that the length of the prime ZC sequence is k.

[0075] To further reduce PAPR and thus improve detection performance, the network may send WUS on less than k subcarriers. For example, assuming that the largest prime number not greater than k is p, the network may send WUS on only p subcarriers. The subcarrier index carrying WUS may be calculated as:

[0076]

[0077] Table 2 is an example of the actual number A of subcarriers carrying WUS. BP It is the single-sided portion of the bandwidth used for the bandpass filter band edge roll-off. r, f BP The values ​​of , k and p can be indicated to the UE through a higher layer message.

[0078]

[0079] Table 2

[0080] The generation of the ZC sequence can reuse the same parameter configuration as the physical uplink control channel (PUCCH) or physical uplink shared channel (PUSCH) DMRS. Therefore, the generation of the ZC sequence can reuse the latest sequence generation configuration (e.g., group hopping and sequence hopping parameters) indicated to the UE through a high-layer message.

[0081] The random sequence or ZC sequence mentioned above can be specific to the target receiver or cell-specific. The basic ZC sequence of length k can be generated using the following formula:

[0082] r(n)=x q (n mod p)

[0083]

[0084] The number p is given by the largest prime number such that p is less than or equal to the number of subcarriers k used to send the WUS. q is a parameter related to the identity of the cell sending the WUS. If p is less than k, the prime ZC sequence can be cyclically extended so that the length of the prime ZC sequence is k.

[0085] The ZC sequence is also specified in the MWUS for MTC. There are differences between the ZC sequences of the MWUS and the ultra-low power embodiment WUS. First, the target receiver and the receiving operation are different. Since the MWUS is designed under the assumption that the receiver performs sequence correlation detection, the ZC sequence is selected because of its excellent correlation characteristics. Although energy detection is expected to be performed at the receiver in the embodiment scheme of the ultra-low power WUS, the ZC sequence improves reception performance by reducing the signal PAPR. Secondly, in the MWUS design, the ZC sequence is sent in 2 PRBs and on each subcarrier in these 2 PRBs. In the embodiment scheme, the ZC sequence can be sent using a configurable number of PRBs, and does not need to occupy each subcarrier of one or more allocated PRBs to further reduce the signal PAPR.

[0086] Another embodiment technique for sending WUS in a cell-specific manner is to send a portion of contiguous subcarriers used in primary synchronization signal (PSS) or secondary synchronization signal (SSS) transmission. The specific portion used by the WUS can be predefined or determined by the implementation.

[0087] The power of unused subcarriers at the edge of one or more allocated PRBs may be allocated to the WUS carrying the subcarriers to boost the transmit power of the WUS.

[0088] An alternative embodiment technique is to generate the WUS signal in the time domain directly using a low PAPR waveform within the frequency bandwidth allocated to the WUS, BWP or PRB.

[0089] The information carried by the WUS can be modulated by on-off keying (OOK). The on and off operations are performed at the OFDM symbol level granularity. For example, a WUS OFDM symbol can be completely off to indicate one information bit (e.g., bit 0). On the other hand, signaling can be performed for the duration of an OFDM symbol to indicate other information (e.g., bit 1). The opposite mapping between on / off and bit 0 / 1 can also be specified.

[0090] A bit sequence can be mapped to a WUS transmission. Each bit in the sequence is mapped to an OFDM symbol duration in turn. The content of the bit determines whether a WUS should be transmitted during the corresponding OFDM symbol duration. When specified, a bit 0 can indicate that the signal is not transmitted, a bit 1 indicates that the signal is transmitted during the OFDM symbol duration, and vice versa.

[0091] The bit sequence can include two parts: preamble bits and coded bits. The preamble bits appear at the beginning of WUS transmission. The purpose of the preamble part of WUS is to allow the WUS receiver to adjust its automatic gain control (AGO) and warm up its bandpass filter and low-pass filter for proper WUS detection.

[0092] The preamble sequence may include certain basic sequences S pa Repeat multiple times. Before the UE enters the RRC inactive state, the network indicates the number of repetitions r through an RRC message pa . Number of times r pa It may also be predefined (for example, predefined in a lookup table according to the network deployment frequency band). pa The choice of should be large enough to allow the receiver to complete its AGC and filter warm-up. An example of a base sequence according to some embodiments is Figure 4 S pa 402(S pa =[1 0]). If the first coded bit in coded bits 404 is 0, then S pa =[0 1] may be used for a preamble to achieve a 1->0 transition at the start of transmission of the coded bits 404 .

[0093] Basic sequence S pa Another example embodiment is to encode bits (e.g., Figure 5 According to some embodiments, a special case in this example is that the preamble sequence can be in, 506 Yes Figure 5 Medium S pa According to some embodiments, another special case in this example is that the preamble sequence is in, 508 Yes Figure 6 Medium S pa 502-bit time-reversed version.

[0094] If the coded bits are not just a fixed bit sequence corresponding to the identity of the intended wake-up receiver (e.g., the coded bits 704 may include a network signaling message to the receiver), the preamble sequence may also need to carry synchronization functionality. For example, according to some embodiments, the designed sequence may be used as a preamble (e.g., including S pa 702 and / or 706) is sent to achieve the following Figure 7 Good synchronization performance shown.

[0095] The coded bits may be generated by mapping information bits including receiver identification information and / or network signaling bits into the WUS bitstream to be transmitted. An example of mapping may be: bit 0 is mapped to bitstream [1 0], bit 1 is mapped to bitstream [0 1], or vice versa. The mapping may also be determined by a parameter r that determines the repetition of the mapped bits. b Control. Assume r b Taking different values ​​of 1, 2, and 3, the corresponding bit mappings are: bit 0 is mapped to the bit streams [1 0], [1 1 0 0], and [1 1 10 0 0], respectively, and bit 1 is mapped to the bit streams [0 1], [0 0 1 1], and [0 0 0 1 11], respectively. Bit repetition is very useful in scenarios where the SCS is large and the wireless channel path delay is long. The reason is that when the OFDM symbol duration is short and the wireless channel path delay is long, more signal energy will leak from the previous on duration to the off duration of the OFDM symbol after OOK modulation, which may degrade the detection performance.

[0096] According to some embodiments, in addition to bit repetition, there may also be additional bit block repetition r blk (For example, blk 802 and r blk 804), such as Figure 8 As shown, the additional bit block repeats r blk The entire block of bits is repeated to enhance WUS detection performance.

[0097] r b and r blk The parameters can be configured individually. The repetition order is to first perform bit-level repetition r b (if any), then perform bit block level repetition r blk (if any). For example, in configuration r b =2 and r blk =1, the mapping is: bit 0 is mapped to the bit stream [1 1 0 0], and bit 1 is mapped to the bit stream [0 0 1 1]. b =1 and r blk = 2, the mapping is: bit 0 is mapped to the bit stream [1 0 1 0], and bit 1 is mapped to the bit stream [0 1 0 1]. b =2 and r blk =2, the mapping is: bit 0 is mapped to the bit stream [1 1 0 0 1 1 0 0], and bit 1 is mapped to the bit stream [0 01 1 0 0 1 1].

[0098] After the entire information bit has been mapped into the coded bits, additional coded bit level repetition can be performed codedAccording to some embodiments, the coded bitstream 904 may only be repeated when the repetitions are continuous in time, e.g. Fig. 9 As shown. Fig. 9 As shown, the preamble bit stream 902 does not repeat. According to some embodiments, if the repetition is not continuous in time, the entire preamble bit stream 1002 and the coded bit stream 1004 repeat r coded times, such as Fig.10 shown.

[0099] Parameter r b 、r blk and r coded It can be indicated to the receiver through an RRC message or predefined (for example, predefined in a lookup table according to the network operating frequency band).

[0100] The network may try to avoid sending a WUS including the first OFDM symbol at the beginning of a half subframe. The duration of the first OFDM symbol is longer than other OFDM symbols, which may cause synchronization problems and reduce the detection performance of the WUS receiver. In the case where the preamble does not carry a synchronization function, the preamble may include a first OFDM symbol with a longer duration.

[0101] Fig.11An exemplary flow chart 1100 of WUS configuration, transmission and reception between a gNB 1102, a UE primary radio 1104 and a UE WUR 1106 provided by some embodiments is shown. The UE primary radio 1104 is a radio used for normal communication of data / control channels using protocols such as LTE or new radio (NR) communication. Turning off the UE primary radio 1104 refers to suspending all normal LTE or NR transmission and reception of data channels, control channels and signals. Waking up the main radio 1104 is equivalent to transitioning the UE from a deep sleep mode (where, for example, the UE only receives a wake-up signal or any other type of signal that the UE's WUR 1106 can receive to wake up the main radio 1104) to another state, in which the UE can start receiving (including detecting and / or decoding) synchronization signals / PBCH blocks (SSBs), reference signals (e.g., tracking reference signals (TRS), CSI reference signals (CSI reference signals, CSI-RS)), control channels (e.g., physical downlink control channels (PDCCH)), data channels (e.g., physical downlink shared channels (PDSCH)), paging signals, etc. or a combination thereof in the downlink LTE or NR, and the UE can start sending random access channel (RACH) signals, control channels (e.g., PUCCH), data channels (e.g., PUSCH), reference signals (e.g., sounding reference signals (RS)), etc.) in the uplink LTE or NR. signal, SRS)) etc. or their combination.

[0102] At operation 1112, the primary radio 1104 of the UE receives one or more configurations from the gNB 1102. The one or more configurations configure one or more BWPs or one or more RBs dedicated to transmitting a WUS.

[0103] At operation 1114, the primary radio 1104 of the UE configures the WUR 1106 of the UE based on the one or more configurations.

[0104] At operation 1116, the primary radio 1104 of the UE sends a configuration confirmation confirming one or more configurations to the gNB 1102. The primary radio 1104 of the UE transitions to deep sleep.

[0105] At operation 1118, the gNB sends a WUS to the WUR 1106 of the UE.

[0106] At operation 1120, the UE's WUR 1106 detects a WUS sent by the gNB 1102 via one or more BWPs or one or more RBs dedicated to sending the WUS. The UE's WUR 1106 wakes up the UE's primary radio 1104.

[0107] At operation 1122, the UE's primary radio 1104 performs a wake-up process with the gNB 1102.

[0108] Fig. 12A A flowchart of a method 1200 performed by a UE provided in some embodiments is shown. The UE may include computer-readable code or instructions executed on one or more processors of the UE. In the present invention, the encoding of software for performing or executing method 1200 is within the scope of ordinary technicians in the field. Method 1200 may include more or fewer operations than those shown and described, and may be performed or executed in a different order. The computer-readable code or instructions of the software executable by one or more processors may be stored on a non-transitory computer-readable medium such as a memory of the UE.

[0109] Method 1200 begins at operation 1202, in which the UE receives one or more configurations from a base station using a first radio of the UE. The one or more configurations indicate resources allocated for wake-up signal (WUS) transmission. At operation 1204, when the first radio of the UE is in a sleep power state, the UE detects the WUS in the resources using a second radio of the UE. At operation 1206, the UE performs a wake-up procedure with the base station using the first radio.

[0110] In some embodiments, after receiving the one or more configurations, the UE may configure a second radio of the UE based on the one or more configurations. To allow the UE to configure the second radio, a controller internal or external to the first radio may configure the second radio based on the one or more configurations. In one embodiment, the first radio may forward the one or more configurations to the second radio. The first radio of the UE may transition to a sleep power state. After detecting the WUS, the second radio of the UE may wake up the first radio of the UE.

[0111] In some embodiments, the resources may include one or more WUS resource blocks (WU-RBs). The one or more configurations received in operation 1202 may indicate a frequency location, duration, starting location, and period of the WUS. The one or more WU-RBs may be located in a WUS bandwidth part (WUS-BWP). The first number of subcarriers carrying the WUS may be based on the second number of one or more WU-RBs and a bandwidth part of the resources for the bandpass filter band roll-off. The bandwidth part may be represented as f BP , for example, f BP Any of the examples above can be used for definition.

[0112] In some embodiments, one or more configurations may also indicate at least one of a bit-level repetition number or a block-level repetition number of the WUS.

[0113] In some embodiments, one or more configurations may also indicate a subcarrier spacing (SCS) of the WUS in the carrier. The SCS may be different from a second SCS used for data and control signal transmission in the carrier. The SCS may be one of 60kHz, 120kHz, 240kHz, 480kHz, or 960kHz, and the resource is within frequency band range 1 (FR1).

[0114] In some embodiments, the WUS may be modulated by on-off keying (OOK). One or more configurations may indicate one or more sequences for shaping the "on" waveform of the OOK of the WUS. The one or more sequences may be cell-specific or receiver-specific. The one or more sequences may be one or more Zadoff-Chu (ZC) sequences.

[0115] In some embodiments, one or more configurations may be carried in a radio resource control (RRC) message or a system information block (SIB).

[0116] In some embodiments, the UE may use the first radio to send a configuration confirmation confirming one or more configurations.

[0117] In some embodiments, the UE may communicate with the base station using the first radio in response to the wake-up procedure.

[0118] In some embodiments, the first radio may be a primary radio of the UE.The second radio may be a wake-up receiver (WUR) of the UE.

[0119] Fig. 12BA flow chart of a method 1250 performed by a base station provided by some embodiments is shown. The base station may include computer-readable code or instructions executed on one or more processors of the base station. In the present invention, the encoding of software for performing or executing method 1250 is within the scope of ordinary technicians in the field. Method 1250 may include more or fewer operations than shown and described, and may be performed or executed in a different order. The computer-readable code or instructions of the software executable by one or more processors may be stored on a non-transitory computer-readable medium such as a memory of the base station.

[0120] Method 1250 begins at operation 1252, where a base station sends one or more configurations to a first radio of a user equipment (UE). The one or more configurations indicate resources allocated for wake-up signal (WUS) transmission. At operation 1254, when the first radio of the UE is in a sleep power state, the base station sends the WUS to a second radio of the UE in the resources. At operation 1256, the base station performs a wake-up procedure with the first radio of the UE.

[0121] In some embodiments, the resources may include one or more WUS resource blocks (WU-RBs). One or more configurations may indicate the frequency location, duration, starting location, and period of the WUS. The one or more WU-RBs may be located in a WUS bandwidth part (WUS-BWP). The first number of subcarriers carrying the WUS may be based on the second number of one or more WU-RBs and the bandwidth part of the resources for the bandpass filter band roll-off. The bandwidth part may be represented as above f BP .

[0122] In some embodiments, one or more configurations may also indicate at least one of a bit-level repetition number or a block-level repetition number of the WUS.

[0123] In some embodiments, one or more configurations may also indicate a subcarrier spacing (SCS) of the WUS in the carrier. The SCS may be different from a second SCS used for data and control signal transmission in the carrier. The SCS may be one of 60kHz, 120kHz, 240kHz, 480kHz, or 960kHz, and the resource is within frequency band range 1 (FR1).

[0124] In some embodiments, the WUS may be modulated by on-off keying (OOK). One or more configurations may indicate one or more sequences for shaping the on waveform of the WUS. One or more sequences may be cell-specific or receiver-specific. One or more sequences may be one or more Zadoff-Chu (ZC) sequences.

[0125] In some embodiments, one or more configurations may be carried in a radio resource control (RRC) message or a system information block (SIB).

[0126] In some embodiments, the base station may receive a configuration confirmation from the first radio of the UE confirming one or more configurations.

[0127] In some embodiments, the base station may communicate with the first radio of the UE in response to the wake-up procedure.

[0128] In some embodiments, the first radio may be a primary radio of the UE.The second radio may be a wake-up receiver (WUR) of the UE.

[0129] Fig.13 An exemplary communication system 1300 is shown. In general, the system 1300 enables multiple wireless or wired users to send and receive data and other content. The communication system 1300 can implement one or more channel access methods, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), single-carrier FDMA (SC-FDMA), or non-orthogonal multiple access (NOMA).

[0130] In this example, the communication system 1300 includes electronic devices (EDs) 1310a to 1310c, radio access networks (RANs) 1320a and 1320b, a core network 1330, a public switched telephone network (PSTN) 1340, the Internet 1350, and other networks 1360. Although some number of these components or elements are not shown in FIG. Fig.13 1300 , but any number of these components or elements may be included in system 1300 .

[0131] ED 1310a to ED 1310c are used to operate or communicate in system 1300. For example, ED 1310a to ED 1310c are used to send or receive through a wireless communication channel or a wired communication channel. Each ED 1310a to ED 1310c represents any suitable end-user device, which may include the following devices (or may be called): user equipment / device (UE), wireless transmit or receive unit (WTRU), mobile station, fixed or mobile subscriber unit, cellular phone, personal digital assistant (PDA), smart phone, laptop, computer, touch pad, wireless sensor or consumer electronic device, etc.

[0132] Here, the RAN 1320a and the RAN 1320b include a base station 1370a and a base station 1370b, respectively. The base station 1370a and the base station 1370b are respectively used to wirelessly connect to one or more of the EDs 1310a to 1310c so as to access the core network 1330, the PSTN 1340, the Internet 1350 or other networks 1360. For example, the base station 1370a and the base station 1370b may include (or may be) one or more of several known devices, such as a base transceiver station (BTS), a node B (NodeB), an evolved NodeB (eNodeB), a next generation (NG) base station (gNB), a home base station, a home eNodeB, a site controller, an access point (AP) or a wireless router. ED 1310 a to ED 1310 c are used to connect and communicate with the Internet 1350 , and can access the core network 1330 , the PSTN 1340 , or other networks 1360 .

[0133] exist Fig.13 In the illustrated embodiment, base station 1370a is part of RAN 1320a, which may include other base stations, elements and / or devices. Similarly, base station 1370b is part of RAN 1320b, which may include other base stations, elements and / or devices. Each base station 1370a and 1370b operates to send or receive wireless signals within a specific geographic area (sometimes referred to as a "cell"). In some embodiments, if each cell has multiple transceivers, multiple-input multiple-output (MIMO) technology can be used.

[0134] Base station 1370a and base station 1370b communicate with one or more of EDs 1310a-1310c using wireless communication links over one or more air interfaces 1390. Air interfaces 1390 may use any suitable radio access technology.

[0135] It is contemplated that the system 1300 may use multi-channel access functionality, including the schemes described above. In a specific embodiment, the base station and ED implement 5G New Radio (NR), LTE, LTE-A, or LTE-B. Of course, other multiple access schemes and wireless protocols may also be used.

[0136] RAN 1320a and RAN 1320b communicate with core network 1330 to provide voice, data, applications, voice over Internet Protocol (VoIP) or other services to ED 1310a to ED 1310c. It is understood that RAN 1320a and RAN 1320b or core network 1330 can communicate directly or indirectly with one or more other RANs (not shown). Core network 1330 can also be used as a gateway access for other networks (e.g., PSTN 1340, Internet 1350 and other networks 1360). In addition, some or all of ED 1310a to ED 1310c may include the function of communicating with different wireless networks through different wireless links using different wireless technologies or protocols. ED can communicate with a service provider or switch (not shown) and with Internet 1350 through a wired communication channel instead of wireless communication (or also wireless communication).

[0137] Although Fig.13 An example of a communication system is shown, but the Fig.13 Various modifications may be made. For example, communication system 1300 may include any number of EDs, base stations, networks, or other components in any suitable configuration.

[0138] Fig.14A and Fig. 14B An exemplary device that can implement the methods and guidance provided by the present invention is shown. Specifically, Fig.14A An exemplary ED 1410 is shown, Fig. 14B An exemplary base station 1470 is shown. These components may be used in system 1300 or any other suitable system.

[0139] like Fig.14AAs shown, ED 1410 includes at least one processing unit 1400. Processing unit 1400 implements various processing operations of ED 1410. For example, processing unit 1400 can perform signal encoding, data processing, power control, input / output processing, or any other function that enables ED 1410 to operate in system 1000. Processing unit 1400 also supports the methods and instructions described in more detail above. Each processing unit 1400 includes any suitable processing device or computing device for performing one or more operations. For example, each processing unit 1400 may include a microprocessor, a microcontroller, a digital signal processor, a field programmable gate array, or an application-specific integrated circuit.

[0140] ED 1410 also includes at least one transceiver 1402. Transceiver 1402 is used to modulate data or other content for transmission through at least one antenna or network interface controller (NIC) 1404. Transceiver 1402 is also used to demodulate data or other content received through at least one antenna 1404. Each transceiver 1402 includes any suitable structure for generating a signal for wireless or wired transmission or for processing a signal received by wireless or wired means. Each antenna 1404 includes any suitable structure for sending or receiving wireless signals or wired signals. ED 1410 can use one or more transceivers 1402, and ED 1410 can use one or more antennas 1404. Although transceiver 1402 is shown as a separate functional unit, transceiver 1402 can also be implemented using at least one transmitter and at least one separate receiver.

[0141] ED 1410 also includes one or more input / output devices 1406 or interfaces (e.g., a wired interface to the Internet 1350). Interaction with users or other devices in the network (network communications) is facilitated through input / output devices 1406. Each input / output device 1406 includes any suitable structure for providing information to or receiving information from a user, such as a speaker, microphone, keypad, keyboard, display, or touch screen, including network interface communications.

[0142] In addition, ED 1410 includes at least one memory 1408. The memory 1408 stores instructions and data used, generated, or collected by ED 1410. For example, the memory 1408 can store software or firmware instructions executed by one or more processing units 1400 and data for reducing or eliminating interference in incoming signals. Each memory 1408 includes any suitable one or more volatile or non-volatile storage and retrieval devices. Any suitable type of memory can be used, for example, random access memory (RAM), read only memory (ROM), hard disk, optical disk, subscriber identity module (SIM) card, memory stick, secure digital (SD) memory card.

[0143] like Fig. 14B As shown, the base station 1470 includes at least one processing unit 1450, at least one transceiver 1452, one or more antennas 1456, at least one memory 1458, and one or more input / output devices or interfaces 1466, wherein at least one transceiver 1452 includes the functions of a transmitter and a receiver. A scheduler that can be understood by those skilled in the art is coupled to the processing unit 1450. The scheduler can be included in the base station 1470 or can be operated separately from the base station 1470. The processing unit 1450 implements various processing operations of the base station 1470, such as signal encoding, data processing, power control, input / output processing, or any other function. The processing unit 1450 can also support the methods and instructions described in more detail above. Each processing unit 1450 includes any suitable processing device or computing device for performing one or more operations. For example, each processing unit 1450 may include a microprocessor, a microcontroller, a digital signal processor, a field programmable gate array, or an application-specific integrated circuit.

[0144] Each transceiver 1452 includes any suitable structure for generating signals for wireless or wired transmission to one or more EDs or other devices. Each transceiver 1452 also includes any suitable structure for processing signals received from one or more EDs or other devices by wireless or wired means. Although shown as a transceiver 1452 in combination, the transmitter and receiver can be independent components. Each antenna 1456 includes any suitable structure for sending or receiving wireless signals or wired signals. Although the common antenna 1456 is shown here as coupled to the transceiver 1452, one or more antennas 1456 can be coupled to one or more transceivers 1452, so that a separate antenna 1456 can be coupled to the transmitter and receiver (if equipped as a separate component). Each memory 1458 includes any suitable one or more volatile or non-volatile storage and retrieval devices. It is convenient to interact with users or other devices (network communication) in the network through each input / output device 1466. Each input / output device 1466 includes any suitable structure for providing information to or receiving information from a user, including network interface communication.

[0145] Fig.15 15 is a block diagram of a computing system 1500 that can be used to implement the devices and methods disclosed herein. For example, the computing system can be any entity in a UE, an access network (AN), a mobility management (MM), a session management (SM), a user plane gateway (UPGW), or an access stratum (AS). A particular device may use all of the components shown or only a subset of the components, and the level of integration may vary from device to device. In addition, a device may contain multiple instances of a component, such as multiple processing units, processors, memories, transmitters, receivers, etc. The computing system 1500 includes a processing unit 1502. The processing unit includes a central processing unit (CPU) 1514, a memory 1508, and may also include a mass storage device 1504, a video adapter 1510, and an I / O interface 1512 connected to a bus 1520.

[0146] Bus 1520 may be one or more of any type of several bus architectures, including a memory bus or memory controller, a peripheral bus, or a video bus. CPU 1514 may include any type of electronic data processor. Memory 1508 may include any type of non-transient system memory, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), read-only memory (ROM), or any combination thereof. In one embodiment, memory 1508 may include a ROM for use at startup and a DRAM for storing programs and data used when executing programs.

[0147] The mass storage 1504 may include any type of non-transitory storage device for storing data, programs, and other information and making the data, programs, and other information accessible via the bus 1520. The mass storage 1504 may include one or more of a solid-state drive, a hard disk drive, a magnetic disk drive, or an optical disk drive, etc.

[0148] The video adapter 1510 and the I / O interface 1512 provide interfaces for coupling external input and output devices to the processing unit 1502. As shown, examples of input and output devices include a display 1518 coupled to the video adapter 1510 and a mouse, keyboard, or printer 1516 coupled to the I / O interface 1512. Other devices may be coupled to the processing unit 1502, and additional or fewer interface cards may be used. For example, a serial interface such as a Universal Serial Bus (USB) (not shown) may be used to provide an interface for external devices.

[0149] The processing unit 1502 also includes one or more network interfaces 1506, which may include wired links such as Ethernet cables or wireless links to access nodes or different networks. The network interface 1506 enables the processing unit 1502 to communicate with remote units through the network. For example, the network interface 1506 can provide wireless communication through one or more transmitters / transmit antennas and one or more receivers / receive antennas. In one embodiment, the processing unit 1502 is coupled to a local area network 1522 or a wide area network for data processing and communication with remote devices (e.g., other processing units, the Internet, or remote storage facilities).

[0150] FIG. 16A to FIG. 16E The wake-up signal evaluation results are shown. Fig.16AIt is shown that a ZC signal in one OFDM symbol has a performance advantage. Fig. 16B It is shown that wider frequency transmission degrades frequency flat detection performance but wider frequency transmission improves frequency selective detection performance. In the simulation setting, the setting of 2 RBs can achieve the best performance. Fig. 16C It is shown that bit-level repetition can improve detection performance. Fig.16D It is shown that block-level repetition can improve detection performance and bit-level repetition is more effective in improving detection performance than bit-block-level repetition. Fig.16E It is shown that a larger SCS can improve detection performance and that a larger SCS is most effective in improving detection performance.

[0151] It should be understood that one or more steps in the embodiment method provided herein can be performed by corresponding units or modules. For example, a signal can be sent by a sending unit or a sending module. A signal can be received by a receiving unit or a receiving module. A signal can be processed by a processing unit or a processing module. Other steps can be performed by an execution unit or a module, a generation unit or a module, an acquisition unit or a module, a setting unit or a module, an adjustment unit or a module, an increase unit or a module, a reduction unit or a module, a determination unit or a module, a modification unit or a module, a reduction unit or a module, a removal unit or a module, or a selection unit or a module. The corresponding unit or module can be hardware, software, or a combination thereof. For example, one or more units or modules can be an integrated circuit, for example, a field programmable gate array (FPGA) or an application-specific integrated circuit (ASIC).

[0152] Although the present invention and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations could be made herein without departing from the scope of the invention.

Claims

1. A method comprising: A user equipment UE receives one or more configurations from a base station using a first radio of the UE, the one or more configurations indicating resources allocated for transmission of a wake-up signal WUS; When the first radio of the UE is in a sleep power state, the UE detects a WUS in the resource using a second radio of the UE; The UE performs a wake-up procedure with the base station using the first radio.

2. The method according to claim 1, further comprising: After said receiving one or more configurations, said UE configuring said second radio of said UE based on said one or more configurations; the first radio of the UE transitioning to the sleep power state; After the detecting the WUS, the second radio of the UE wakes up the first radio of the UE.

3. The method according to any one of claims 1 to 2, characterized in that The resources include one or more WUS resource blocks WU-RBs, and the one or more configurations indicate a frequency position, a duration, a starting position, and a period of the WUS.

4. The method according to claim 3, characterized in that The one or more WU-RBs are located in the WUS bandwidth part WUS-BWP.

5. The method according to claim 3, characterized in that: The first number of subcarriers carrying the WUS is based on a second number of the one or more WU-RBs and a guard band portion of the resources. 6 . The method according to claim 1 , wherein the one or more configurations further indicate at least one of a bit-level repetition number or a block-level repetition number of the WUS.

7. According to the method according to any one of claims 1 to 6, the one or more configurations also indicate a subcarrier spacing SCS of the WUS in a carrier, and the SCS is different from a second SCS used for data and control signal transmission in the carrier.

8. The method according to claim 7, characterized in that The SCS is one of 60kHz, 120kHz, 240kHz, 480kHz or 960kHz, and the resource is within a frequency band range 1FR1.

9. The method according to any one of claims 1 to 8, wherein the WUS is modulated by on-off keying (OOK), and the one or more configurations indicate one or more sequences for shaping a turn-on waveform of the WUS.

10. The method of claim 9, wherein the one or more sequences are cell-specific or receiver-specific.

11. The method of claim 9, wherein the one or more sequences are one or more Zadoff-Chu ZC sequences.

12. The method according to any one of claims 1 to 11, wherein the one or more configurations are carried in a radio resource control (RRC) message or a system information block (SIB).

13. The method according to any one of claims 1 to 12, further comprising: The UE sends a configuration confirmation confirming the one or more configurations using the first radio.

14. The method according to any one of claims 1 to 13, wherein the sleep power state is a deep sleep state.

15. The method according to any one of claims 1 to 14, further comprising: The UE communicates with the base station using the first radio in response to the wake-up procedure.

16. The method according to any one of claims 1 to 15, characterized in that The first radio is a primary radio of the UE and the second radio is a wake-up receiver WUR of the UE.

17. A method comprising: The base station sends one or more configurations to a first radio of a user equipment UE, wherein the one or more configurations indicate resources allocated for transmission of a wake-up signal WUS; When the first radio of the UE is in a sleep power state, the base station sends a WUS in the resource to a second radio of the UE; The base station performs a wake-up procedure with the first radio of the UE.

18. The method according to claim 17, characterized in that The resources include one or more WUS resource blocks WU-RBs, and the one or more configurations indicate a frequency position, a duration, a starting position, and a period of the WUS.

19. The method according to claim 18, characterized in that The one or more WU-RBs are located in the WUS bandwidth part WUS-BWP.

20. The method of claim 18, wherein the first number of subcarriers carrying the WUS is based on a second number of the one or more WU-RBs and a guard band portion of the resources.

21. The method according to any one of claims 17 to 20, wherein the one or more configurations further indicate at least one of a bit-level repetition number or a block-level repetition number of the WUS.

22. According to the method according to any one of claims 17 to 21, the one or more configurations also indicate a subcarrier spacing SCS of the WUS in a carrier, and the SCS is different from a second SCS used for data and control signal transmission in the carrier.

23. The method according to claim 22, characterized in that The SCS is one of 60kHz, 120kHz, 240kHz, 480kHz or 960kHz, and the resource is within a frequency band range 1FR1.

24. The method according to any one of claims 17 to 23, wherein the WUS is modulated by on-off keying (OOK), and the one or more configurations indicate one or more sequences for shaping a turn-on waveform of the WUS.

25. The method of claim 24, wherein the one or more sequences are cell-specific or receiver-specific.

26. The method of claim 24, wherein the one or more sequences are one or more Zadoff-Chu ZC sequences.

27. The method according to any one of claims 17 to 26, wherein the one or more configurations are carried in a radio resource control (RRC) message or a system information block (SIB).

28. The method according to any one of claims 17 to 27, further comprising: The base station receives a configuration confirmation from the first radio of the UE confirming the one or more configurations.

29. The method according to any one of claims 17 to 28, wherein the sleep power state is a deep sleep state.

30. The method according to any one of claims 17 to 29, further comprising: The base station communicates with the first radio of the UE in response to the wake-up procedure.

31. The method according to any one of claims 17 to 30, characterized in that The first radio is a primary radio of the UE and the second radio is a wake-up receiver WUR of the UE.

32. A user equipment UE, comprising: at least one processor; A non-transitory computer-readable storage medium storing instructions which, when executed by the at least one processor, cause the UE to perform the method according to any one of claims 1 to 16.

33. A base station, comprising: at least one processor; A non-transitory computer-readable storage medium storing instructions which, when executed by the at least one processor, cause the base station to perform the method according to any one of claims 17 to 31.

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