Method and apparatus for transmitting and receiving signal in wireless communication system

Abstract

The present disclosure relates to a 5G communication system or a 6G communication system for supporting higher data rates beyond a 4G communication system such as long term evolution (LTE). A method performed by a UE includes receiving first configuration information related to a first BWP or second configuration information related to a SS / PBCH block, receiving third configuration information related to a first signal for waking up the UE and / or a second signal for synchronization of the first signal, and determining, based on the first configuration information or the second configuration information and based on the third configuration information, a subcarrier spacing (SCS) of the first signal and / or an SCS of the second signal.

Description

METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SIGNAL IN WIRELESS COMMUNICATION SYSTEM

[0001] The present disclosure relates to the field of wireless communication technology, and more specifically, to a method and an apparatus for transmitting and receiving a signal in a wireless communication system.

[0002] Considering the development of wireless communication from generation to generation, the technologies have been developed mainly for services targeting humans, such as voice calls, multimedia services, and data services. Following the commercialization of 5G (5th-generation) communication systems, it is expected that the number of connected devices will exponentially grow. Increasingly, these will be connected to communication networks. Examples of connected things may include vehicles, robots, drones, home appliances, displays, smart sensors connected to various infrastructures, construction machines, and factory equipment. Mobile devices are expected to evolve in various form-factors, such as augmented reality glasses, virtual reality headsets, and hologram devices. In order to provide various services by connecting hundreds of billions of devices and things in the 6G (6th-generation) era, there have been ongoing efforts to develop improved 6G communication systems. For these reasons, 6G communication systems are referred to as beyond-5G systems.

[0003] 6G communication systems, which are expected to be commercialized around 2030, will have a peak data rate of tera (1,000 giga)-level bps and a radio latency less than 100μsec, and thus will be 50 times as fast as 5G communication systems and have the 1 / 10 radio latency thereof.

[0004] In order to accomplish such a high data rate and an ultra-low latency, it has been considered to implement 6G communication systems in a terahertz band (for example, 95GHz to 3THz bands). It is expected that, due to severer path loss and atmospheric absorption in the terahertz bands than those in mmWave bands introduced in 5G, technologies capable of securing the signal transmission distance (that is, coverage) will become more crucial. It is necessary to develop, as major technologies for securing the coverage, radio frequency (RF) elements, antennas, novel waveforms having a better coverage than orthogonal frequency division multiplexing (OFDM), beamforming and massive multiple input multiple output (MIMO), full dimensional MIMO (FD-MIMO), array antennas, and multiantenna transmission technologies such as large-scale antennas. In addition, there has been ongoing discussion on new technologies for improving the coverage of terahertz-band signals, such as metamaterial-based lenses and antennas, orbital angular momentum (OAM), and reconfigurable intelligent surface (RIS).

[0005] Moreover, in order to improve the spectral efficiency and the overall network performances, the following technologies have been developed for 6G communication systems: a full-duplex technology for enabling an uplink transmission and a downlink transmission to simultaneously use the same frequency resource at the same time; a network technology for utilizing satellites, high-altitude platform stations (HAPS), and the like in an integrated manner; an improved network structure for supporting mobile base stations and the like and enabling network operation optimization and automation and the like; a dynamic spectrum sharing technology via collison avoidance based on a prediction of spectrum usage; an use of artificial intelligence (AI) in wireless communication for improvement of overall network operation by utilizing AI from a designing phase for developing 6G and internalizing end-to-end AI support functions; and a next-generation distributed computing technology for overcoming the limit of UE computing ability through reachable super-high-performance communication and computing resources (such as mobile edge computing (MEC), clouds, and the like) over the network. In addition, through designing new protocols to be used in 6G communication systems, developing mecahnisms for implementing a hardware-based security environment and safe use of data, and developing technologies for maintaining privacy, attempts to strengthen the connectivity between devices, optimize the network, promote softwarization of network entities, and increase the openness of wireless communications are continuing.

[0006] It is expected that research and development of 6G communication systems in hyper-connectivity, including person to machine (P2M) as well as machine to machine (M2M), will allow the next hyper-connected experience. Particularly, it is expected that services such as truly immersive extended reality (XR), high-fidelity mobile hologram, and digital replica could be provided through 6G communication systems. In addition, services such as remote surgery for security and reliability enhancement, industrial automation, and emergency response will be provided through the 6G communication system such that the technologies could be applied in various fields such as industry, medical care, automobiles, and home appliances.

[0007] In use cases with stricter UE low energy consumption requirements, in order to further extend the battery life of the UE, the wireless communication system may use a new low power wake up signal (Low Power Wake Up Signal, LPWUS) to wake up the UE. Therefore, the process of receiving LPWUS needs to be further improved.

[0008] The present disclosure relates to a 5G communication system or a 6G communication system for supporting higher data rates beyond a 4G communication system such as long term evolution (LTE). A method performed by a UE includes receiving first configuration information related to a first BWP or second configuration information related to a SS / PBCH block, receiving third configuration information related to a first signal for waking up the UE and / or a second signal for synchronization of the first signal, and determining, based on the first configuration information or the second configuration information and based on the third configuration information, a subcarrier spacing (SCS) of the first signal and / or an SCS of the second signal.

[0009] In order to illustrate the technical schemes of the embodiments of the present disclosure more clearly, the drawings of the embodiments will be briefly introduced below. Apparently, the drawings in the following description only relate to some embodiments of the present disclosure, and do not limit the present disclosure. In the drawings:

[0010] FIG. 1 illustrates a schematic diagram of an example wireless network according to various embodiments of the present disclosure;

[0011] FIG. 2a illustrates an example wireless transmission path according to various embodiments of the present disclosure;

[0012] FIG. 2b illustrates an example wireless reception path according to various embodiments of the present disclosure;

[0013] FIG. 3a illustrates an example user equipment (UE) according to various embodiments of the present disclosure;

[0014] FIG. 3b illustrates an example gNB according to various embodiments of the present disclosure;

[0015] FIG. 4 illustrates a flowchart of a method performed by a UE according to various embodiments of the present disclosure;

[0016] FIG. 5 illustrates a flowchart of a method performed by a base station according to various embodiments of the present disclosure;

[0017] FIG. 6 illustrates a block diagram of a UE according to various embodiments of the present disclosure; and

[0018] FIG. 7 illustrates a block diagram of a base station according to various embodiments of the present disclosure.

[0019] According to an embodiment of the present disclosure, there is provided a method performed by a user equipment (UE) in a wireless communication system including: receiving first configuration information related to a first bandwidth part (BWP) or second configuration information related to a synchronization signal / physical broadcast channel (SS / PBCH) block, where the first configuration information includes information related to a frequency domain location of the first BWP and the second configuration information includes information related to a frequency domain location of the SS / PBCH block; receiving third configuration information related to at least one of a first signal for waking up the UE or a second signal for synchronization of the first signal, where the third configuration information includes information related to at least one of a frequency domain location of the first signal or a frequency domain location of the second signal; and determining, based on the first configuration information or the second configuration information and based on the third configuration information, at least one of a subcarrier spacing (SCS) of the first signal or an SCS of the second signal.

[0020] In some implementations, the method further includes: determining, based on the first configuration information or the second configuration information and based on the third configuration information, at least one of a quasi-co-location (QCL) relationship between the first signal and the SS / PBCH block or a QCL relationship between the second signal and the SS / PBCH block.

[0021] In some implementations, the method further includes at least one of: determining, based on the first configuration information and the third configuration information, a first relationship between the frequency domain location of the first signal and / or the frequency domain location of the second signal and the frequency domain location of the first BWP; determining, based on the second configuration information and the third configuration information, a second relationship between the frequency domain location of the first signal and / or the frequency domain location of the second signal and the frequency domain location of the SS / PBCH block.

[0022] In some implementations, the first relationship is determined based on at least one of: the first signal and / or the second signal configured inside the first BWP, the first signal and / or the second signal configured outside the first BWP, and the second relationship is determined based on at least one of: the first signal and / or the second signal are on a same carrier as the SS / PBCH block, the first signal and / or the second signal are on a different carrier than the SS / PBCH block.

[0023] In some implementations, the method further includes at least one of: determining that the SCS of the first signal and / or the SCS of the second signal have a same SCS with the SS / PBCH block, if the first signal and / or the second signal are inside the first BWP or the first signal and / or the second signal are on the same carrier as the SS / PBCH block; determining that the SCS of the first signal is the same as the SCS of the second signal, if the first signal and / or the second signal are outside the first BWP or the first signal and / or the second signal are on the different carrier than the SS / PBCH block, where the SCS of the second signal is configured or the same as an SCS of the first BWP; determining that the SCS of the first signal and / or the SCS of the second signal are a maximum SCS among the SCS of the SS / PBCH block and an SCS of the first BWP, if the SCS of the SS / PBCH block is different from the SCS of the first BWP; determining that the SCS of the first signal and / or the SCS of the second signal have a same SCS with the first BWP including the SS / PBCH block and a control resource set or the SCS of the SS / PBCH block, if the UE is in a radio resource control (RRC) idle state or an RRC inactive state; determining that the SCS of the first signal is the same as the SCS of the first BWP and / or an SCS of a control resource set, if a bandwidth of a second BWP overlaps with a bandwidth of the control resource set and an SCS of the second BWP is the same as the SCS of the control resource set; determining that the SCS of the first signal is the same as the SCS of the second BWP and / or the SCS of the control resource set, if the bandwidth of the second BWP does not overlap with the bandwidth of the control resource set or the SCS of the second BWP is different from the SCS of the control resource set; determining that the SCS of the first signal is the same as the SCS of the SS / PBCH block, if the first signal and the SS / PBCH block are inside a same second BWP.

[0024] In some implementations, the method further includes at least one of: determining that an SCS associated with a wake up delay value is determined based on an SCS of the SS / PBCH block, if the SCS of the first signal is different from the SCS of the SS / PBCH block; determining that the SCS associated with the wake up delay value is determined based on an SCS of the first BWP, if the SCS of the first signal is different from the SCS of the first BWP; determining that the SCS associated with the wake up delay value is determined based on an SCS of the second BWP, if the SCS of the first signal is different from the SCS of the second BWP; determining that the SCS associated with the wake up delay value is determined based on the SCS of the first signal, where the wake up delay value corresponds to an SCS one by one.

[0025] In some implementations, the method further includes performing, in a radio resource control (RRC) idle state or an RRC inactive state, at least one of: determining that the QCL relationship between the first signal and / or the second signal and the SS / PBCH block is a first type, if the first signal and / or the second signal are on a same carrier and / or the first signal and / or the second signal are inside the first BWP; determining that the QCL relationship between the first signal and / or the second signal and the SS / PBCH block is a second type, if the first signal and / or the second signal are on different carriers and / or the first signal and / or the second signal are outside the first BWP.

[0026] In some implementations, the method further includes performing, in a radio resource control (RRC) connected state, at least one of: determining that the QCL relationship between the first signal and the SS / PBCH block is a first type, if the first signal and / or the SS / PBCH block are on a same carrier and / or the first signal is inside a second BWP; determining that the QCL relationship between the first signal and the SS / PBCH block is a second type, if the first signal and / or the SS / PBCH block are on different carriers and / or the first signal is outside the second BWP; determining that a QCL relationship between the first signal and a channel state information (CSI)-reference signal (RS) is the first type, if the first signal and / or the CSI-RS are on a same carrier and / or the first signal is inside the second BWP; determining that the QCL relationship between the first signal and the CSI-RS is the second type, if the first signal and / or the CSI-RS are on different carriers and / or the first signal is outside the second BWP.

[0027] In some implementations, the method further includes: determining that the UE is in an out-of-sync state and / or transmitting a fourth signal to request to activate a transmission of a third signal for synchronization of the first signal, if a first condition is satisfied.

[0028] In some implementations, the first condition includes at least one of: a reference signal received strength of the second signal being below a first threshold value for determining that the UE is in an in-sync state or an out-of-sync state, the reference signal received strength of the second signal being above a second threshold value for determining to exit monitoring of the first signal, a reference signal received quality of the second signal being below a third threshold value for determining that the UE is in the in-sync state or the out-of-sync state, the reference signal received quality of the second signal being above a fourth threshold value for determining to exit the monitoring of the first signal, an absolute value of a difference between the reference signal received strength of the second signal and a fifth threshold value for enabling the monitoring of the first signal being greater than a sixth threshold value, an absolute value of a difference between the reference signal received quality of the second signal and a seventh threshold value for enabling the monitoring of the first signal being greater than an eighth threshold value, N consecutive out-of-sync indications being received, the first signal failing to be successfully decoded for X consecutive time units.

[0029] In some implementations, determining that the UE is in the out-of-sync state and / or transmitting the fourth signal if the first condition is satisfied includes: determining that the UE is in the out-of-sync state and / or transmitting the fourth signal, if the first condition and a second condition are satisfied.

[0030] In some implementations, the second condition includes at least one of: Y first signals failing to be successfully decoded before a first timer expires, an average value of a reference signal received strength of the second signal being below a ninth threshold value for determining that the UE is in the in-sync state or the out-of-sync state before the first timer expires, the average value of the reference signal received strength of the second signal being above a tenth threshold value for enabling monitoring of the first signal before the first timer expires, an average value of a reference signal received quality of the second signal being below an eleventh threshold value for determining that the UE is in the in-sync state or the out-of-sync state before the first timer expires, the average value of the reference signal received quality of the second signal being above a twelfth threshold value for enabling the monitoring of the first signal before the first timer expires, an absolute value of a difference between the average value of the reference signal received strength of the second signal and the fifth threshold value for enabling the monitoring of the first signal being greater than a thirteenth threshold value before the first timer expires, an absolute value of a difference between the average value of the reference signal received quality of the second signal and the seventh threshold value for enabling the monitoring of the first signal being greater than a fourteenth threshold value before the first timer expires.

[0031] In some implementations, the second configuration information further includes a number of bits of the first signal transmitted in each orthogonal frequency division multiplexing (OFDM) symbol, and the method further includes determining a resource related to a monitoring occasion for the first signal based on the SCS of the first signal and the second configuration information.

[0032] In some implementations, determining the resource related to the monitoring occasion for the first signal based on the SCS of the first signal and the second configuration information includes: determining a length or a duration of the monitoring occasion for the first signal based on the SCS of the first signal and the second configuration information.

[0033] According to an embodiment of the present disclosure, there is provided a method performed by a base station in a wireless communication system including: transmitting first configuration information related to a first bandwidth part (BWP) or second configuration information related to a synchronization signal / physical broadcast channel (SS / PBCH) block, where the first configuration information includes information related to a frequency domain location of the first BWP and the second configuration information includes information related to a frequency domain location of the SSB; transmitting third configuration information related to a first signal for waking up a user equipment (UE) and / or a second signal for synchronization of the first signal, where the third configuration information includes information related to at least one of a frequency domain location of the first signal or a frequency domain location of the second signal, where the first configuration information or the second configuration information, and the third configuration information are used to determine a subcarrier spacing (SCS) of at least one of the first signal or an SCS of the second signal.

[0034] In some implementations, the first configuration information or the second configuration information, and the third configuration information are used to determine a quasi-co-location (QCL) relationship between the first signal and / or the second signal and the SS / PBCH block.

[0035] In some implementations, the first configuration information and the third configuration information are used to determine a first relationship between the frequency domain location of the first signal and / or the frequency domain location of the second signal and the frequency domain location of the first BWP, and / or the second configuration information and the third configuration information are used to determine a second relationship between the frequency domain location of the first signal and / or the frequency domain location of the second signal and the frequency domain location of the SS / PBCH block.

[0036] In some implementations, the first relationship includes at least one of: the first signal and / or the second signal configured inside the first BWP, the first signal and / or the second signal configured outside the first BWP, and the second relationship includes at least one of: the first signal and / or the second signal are on a same carrier as the SS / PBCH block, the first signal and / or the second signal are on a different carrier than the SS / PBCH block.

[0037] In some implementations, the SCS of the first signal and / or the SCS of the second signal are determined to be the same as an SCS of the SS / PBCH block, if the first signal and / or the second signal are inside the first BWP or the first signal and / or the second signal are on the same carrier as the SS / PBCH block, and / or the SCS of the first signal are determined to be the same as the SCS of the second signal, if the first signal and / or the second signal are outside the first BWP or the first signal and / or the second signal are on the different carrier than the SS / PBCH block, where the SCS of the second signal is configured or the same as an SCS of the first BWP, and / or the SCS of the first signal and / or the SCS of the second signal are determined to be a maximum SCS among the SCS of the SS / PBCH block and an SCS of the first BWP, if the SCS of the SS / PBCH block is different from the SCS of the first BWP, and / or the SCS of the first signal and / or the SCS of the second signal are determined to be the same as the SCS of the first BWP including the SS / PBCH block and a control resource set or the SCS of the SS / PBCH block, if the UE is in a radio resource control (RRC) idle state or an RRC inactive state, and / or the SCS of the first signal is determined to be the same as the SCS of the first BWP and / or an SCS of a control resource set, if a bandwidth of a second BWP overlaps with a bandwidth of the control resource set and an SCS of the second BWP is the same as the SCS of the control resource set, and / or the SCS of the first signal is determined to be the same as the SCS of the second BWP and / or the SCS of the control resource set, if the bandwidth of the second BWP does not overlap with the bandwidth of the control resource set or the SCS of the second BWP is different from the SCS of the control resource set, and / or the SCS of the first signal is determined to be the same as the SCS of the SS / PBCH block, if the first signal and the SS / PBCH block are inside a same second BWP.

[0038] In some implementations, an SCS associated with a wake up delay value is determined to be determined based on an SCS of the SS / PBCH block, if the SCS of the first signal is different from the SCS of the SS / PBCH block, and / or the SCS associated with the wake up delay value is determined to be determined based on an SCS of the first BWP, if the SCS of the first signal is different from the SCS of the first BWP, and / or the SCS associated with the wake up delay value is determined to be determined based on an SCS of the second BWP, if the SCS of the first signal is different from the SCS of the second BWP, and / or the SCS associated with the wake up delay value is determined to be determined based on the SCS of the first signal, where the wake up delay value corresponds to an SCS one by one.

[0039] In some implementations, in case that the UE is in a radio resource control (RRC) idle state or an RRC inactive state: the QCL relationship between the first signal and / or the second signal and the SS / PBCH block is determined to be a first type, if the first signal and / or the second signal are on a same carrier and / or the first signal and / or the second signal are inside the first BWP, and / or the QCL relationship between the first signal and / or the second signal and the SS / PBCH block is determined to be a second type, if the first signal and / or the second signal are on different carriers and / or the first signal and / or the second signal are outside the first BWP.

[0040] In some implementations, in case that the UE is in a radio resource control (RRC) connected state: the QCL relationship between the first signal and the SS / PBCH block is determined to be a first type, if the first signal and / or the SS / PBCH block are on a same carrier and / or the first signal is inside a second BWP, and / or the QCL relationship between the first signal and the SS / PBCH block is determined to be a second type, if the first signal and / or the SS / PBCH block are on different carriers and / or the first signal is outside the second BWP, and / or a QCL relationship between the first signal and a channel state information (CSI)-reference signal (RS) is determined to be the first type, if the first signal and / or the CSI-RS are on a same carrier and / or the first signal is inside the second BWP, and / or the QCL relationship between the first signal and the CSI-RS is determined to be the second type, if the first signal and / or the CSI-RS are on different carriers and / or the first signal is outside the second BWP.

[0041] In some implementations, the UE is in an out-of-sync state and / or receiving a fourth signal to request to activate a transmission of a third signal for synchronization of the first signal, if a first condition is satisfied.

[0042] In some implementations, the first condition includes at least one of: a reference signal received strength of the second signal being below a first threshold value for determining that the UE is in an in-sync state or an out-of-sync state, the reference signal received strength of the second signal being above a second threshold value for determining to exit monitoring of the first signal, a reference signal received quality of the second signal being below a third threshold value for determining that the UE is in the in-sync state or the out-of-sync state, the reference signal received quality of the second signal being above a fourth threshold value for determining to exit the monitoring of the first signal, an absolute value of a difference between the reference signal received strength of the second signal and a fifth threshold value for enabling the monitoring of the first signal being greater than a sixth threshold value, an absolute value of a difference between the reference signal received quality of the second signal and a seventh threshold value for enabling the monitoring of the first signal being greater than an eighth threshold value, N consecutive out-of-sync indications being received, the first signal failing to be successfully decoded for X consecutive time units.

[0043] In some implementations, the UE is in the out-of-sync state and / or receiving the fourth signal, if the first condition and a second condition are satisfied.

[0044] In some implementations, the second condition includes at least one of: Y first signals failing to be successfully decoded before a first timer expires, an average value of a reference signal received strength of the second signal being below a ninth threshold value for determining that the UE is in the in-sync state or the out-of-sync state before the first timer expires, the average value of the reference signal received strength of the second signal being above a tenth threshold value for enabling monitoring of the first signal before the first timer expires, an average value of a reference signal received quality of the second signal being below an eleventh threshold value for determining that the UE is in the in-sync state or the out-of-sync state before the first timer expires, the average value of the reference signal received quality of the second signal being above a twelfth threshold value for enabling the monitoring of the first signal before the first timer expires, an absolute value of a difference between the average value of the reference signal received strength of the second signal and the fifth threshold value for enabling the monitoring of the first signal being greater than a thirteenth threshold value before the first timer expires, an absolute value of a difference between the average value of the reference signal received quality of the second signal and the seventh threshold value for enabling the monitoring of the first signal being greater than a fourteenth threshold value before the first timer expires.

[0045] In some implementations, the second configuration information further includes a number of bits of the first signal transmitted in each orthogonal frequency division multiplexing (OFDM) symbol, and the SCS of the first signal and the second configuration information are used to determine a resource related to a monitoring occasion for the first signal.

[0046] In some implementations, the SCS of the first signal and the second configuration information are further used to determine a length or a duration of the monitoring occasion for the first signal.

[0047] According to an embodiment of the present disclosure, there is provided a user equipment (UE) in a wireless communication system including: a transceiver; and a processor coupled with the transceiver and configured to perform the aforementioned methods.

[0048] According to an embodiment of the present disclosure, there is provided a base station in a wireless communication system including: a transceiver; and a processor coupled with the transceiver and configured to perform the aforementioned methods.

[0049] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the present disclosure as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the present disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

[0050] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustration purpose only and not for the purpose of limiting the present disclosure as defined by the appended claims and their equivalents.

[0051] It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component surface" includes reference to one or more of such surfaces.

[0052] The term "include" or "may include" refers to the existence of a corresponding disclosed function, operation or component which can be used in various embodiments of the present disclosure and does not limit one or more additional functions, operations, or components. The terms such as "include" and / or "have" may be construed to denote a certain characteristic, number, step, operation, constituent element, component or a combination thereof, but may not be construed to exclude the existence of or a possibility of addition of one or more other characteristics, numbers, steps, operations, constituent elements, components or combinations thereof.

[0053] The term "or" used in various embodiments of the present disclosure includes any or all of combinations of listed words. For example, the expression "A or B" may include A, may include B, or may include both A and B.

[0054] Unless defined differently, all terms used herein, which include technical terminologies or scientific terminologies, have the same meaning as that understood by a person skilled in the art to which the present disclosure belongs. Such terms as those defined in a generally used dictionary are to be interpreted to have the meanings equal to the contextual meanings in the relevant field of art, and are not to be interpreted to have ideal or excessively formal meanings unless clearly defined in the present disclosure.

[0055] The various embodiments of the present disclosure can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, broadband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system Frequency division duplex (FDD) systems, time division duplex (TDD) systems, universal mobile telecommunications systems (UMTS), global interoperability for microwave access (WiMAX) communication systems, fifth generation (5G) systems or new wireless (NR) systems, etc. In addition, the various embodiments of the present disclosure can be applied to future oriented communication technologies.

[0056] In order to meet the increasing demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also called "Beyond 4G networks" or "Post-LTE systems".

[0057] In order to achieve a higher data rate, 5G communication systems are implemented in higher frequency (millimeter, mmWave) bands, e.g., 60 GHz bands. In order to reduce propagation loss of radio waves and increase a transmission distance, technologies such as beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antenna, analog beamforming and large-scale antenna are discussed in 5G communication systems.

[0058] In addition, in 5G communication systems, developments of system network improvement are underway based on advanced small cell, cloud radio access network (RAN), ultra-dense network, device-to-device (D2D) communication, wireless backhaul, mobile network, cooperative communication, coordinated multi-points (CoMP), reception-end interference cancellation, etc.

[0059] In 5G systems, hybrid frequency shift keing (FSK) and QAM modulation (FQAM) and sliding window superposition coding (SWSC) as advanced coding modulation (ACM), and filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies have been developed.

[0060] FIG. 1 illustrates an example wireless network 100 according to various embodiments of the present disclosure. The embodiment of the wireless network 100 shown in FIG. 1 is for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of the present disclosure.

[0061] The wireless network 100 includes a gNodeB (gNB) 101, a gNB 102, and a gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one Internet Protocol (IP) network 130, such as the Internet, a private IP network, or other data networks.

[0062] Depending on a type of the network, other well-known terms such as "base station" or "access point" may be used instead of "gNodeB" or "gNB". For convenience, the terms "gNodeB" and "gNB" are used in this patent document to refer to network infrastructure components that provide wireless access for remote terminals. And, depending on the type of the network, other well-known terms such as "mobile station", "user station", "remote terminal", "wireless terminal" or "user apparatus" may be used instead of "user equipment" or "UE". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to remote wireless devices that wirelessly access the gNB, no matter whether the UE is a mobile device (such as a mobile phone or a smart phone) or a fixed device (such as a desktop computer or a vending machine).

[0063] gNB 102 provides wireless broadband access to the network 130 for a first plurality of User Equipments (UEs) within a coverage area 120 of gNB 102. The first plurality of UEs include a UE 111, which may be located in a Small Business (SB); a UE 112, which may be located in an enterprise (E); a UE 113, which may be located in a WiFi Hotspot (HS); a UE 114, which may be located in a first residence (R); a UE 115, which may be located in a second residence (R); a UE 116, which may be a mobile device (M), such as a cellular phone, a wireless laptop computer, a wireless PDA, etc. GNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within a coverage area 125 of gNB 103. The second plurality of UEs include a UE 115 and a UE 116. In some embodiments, one or more of gNBs 101-103 may communicate with each other and with UEs 111-116 using 5G, Long Term Evolution (LTE), LTE-A, WiMAX or other advanced wireless communication technologies.

[0064] The dashed lines show approximate ranges of the coverage areas 120 and 125, and the ranges are shown as approximate circles merely for illustration and explanation purposes. It should be clearly understood that the coverage areas associated with the gNBs, such as the coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on configurations of the gNBs and changes in the radio environment associated with natural obstacles and man-made obstacles.

[0065] As will be described in more detail below, one or more of gNB 101, gNB 102, and gNB 103 include a 2D antenna array as described in embodiments of the present disclosure. In some embodiments, one or more of gNB 101, gNB 102, and gNB 103 support codebook designs and structures for systems with 2D antenna arrays.

[0066] Although FIG. 1 illustrates an example of the wireless network 100, various changes may be made to FIG. 1. The wireless network 100 may include any number of gNBs and any number of UEs in any suitable arrangement, for example. Furthermore, gNB 101 may directly communicate with any number of UEs and provide wireless broadband access to the network 130 for those UEs. Similarly, each gNB 102-103 may directly communicate with the network 130 and provide direct wireless broadband access to the network 130 for the UEs. In addition, gNB 101, 102 and / or 103 may provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0067] FIGs. 2a and 2b illustrate example wireless transmission and reception paths according to the present disclosure. In the following description, the transmission path 200 may be described as being implemented in a gNB, such as gNB 102, and the reception path 250 may be described as being implemented in a UE, such as UE 116. However, it should be understood that the reception path 250 may be implemented in a gNB and the transmission path 200 may be implemented in a UE. In some embodiments, the reception path 250 is configured to support codebook designs and structures for systems with 2D antenna arrays as described in embodiments of the present disclosure.

[0068] The transmission path 200 includes a channel coding and modulation block 205, a Serial-to-Parallel (S-to-P) block 210, a size N Inverse Fast Fourier Transform (IFFT) block 215, a Parallel-to-Serial (P-to-S) block 220, a cyclic prefix addition block 225, and an up-converter (UC) 230. The reception path 250 includes a down-converter (DC) 255, a cyclic prefix removal block 260, a Serial-to-Parallel (S-to-P) block 265, a size N Fast Fourier Transform (FFT) block 270, a Parallel-to-Serial (P-to-S) block 275, and a channel decoding and demodulation block 280.

[0069] In the transmission path 200, the channel coding and modulation block 205 receives a set of information bits, applies coding (such as Low Density Parity Check (LDPC) coding), and modulates the input bits (such as using Quadrature Phase Shift Keying (QPSK) or Quadrature Amplitude Modulation (QAM)) to generate a sequence of frequency-domain modulated symbols. The Serial-to-Parallel (S-to-P) block 210 converts (such as demultiplexes) serial modulated symbols into parallel data to generate N parallel symbol streams, where N is a size of the IFFT / FFT used in gNB 102 and UE 116. The size N IFFT block 215 performs IFFT operations on the N parallel symbol streams to generate a time-domain output signal. The Parallel-to-Serial block 220 converts (such as multiplexes) parallel time-domain output symbols from the Size N IFFT block 215 to generate a serial time-domain signal. The cyclic prefix addition block 225 inserts a cyclic prefix into the time-domain signal. The up-converter 230 modulates (such as up-converts) the output of the cyclic prefix addition block 225 to an RF frequency for transmission via a wireless channel. The signal may also be filtered at a baseband before switching to the RF frequency.

[0070] The RF signal transmitted from gNB 102 arrives at UE 116 after passing through the wireless channel, and operations in reverse to those at gNB 102 are performed at UE 116. The down-converter 255 down-converts the received signal to a baseband frequency, and the cyclic prefix removal block 260 removes the cyclic prefix to generate a serial time-domain baseband signal. The Serial-to-Parallel block 265 converts the time-domain baseband signal into a parallel time-domain signal. The Size N FFT block 270 performs an FFT algorithm to generate N parallel frequency-domain signals. The Parallel-to-Serial block 275 converts the parallel frequency-domain signal into a sequence of modulated data symbols. The channel decoding and demodulation block 280 demodulates and decodes the modulated symbols to recover the original input data stream.

[0071] Each of gNBs 101-103 may implement a transmission path 200 similar to that for transmitting to UEs 111-116 in the downlink, and may implement a reception path 250 similar to that for receiving from UEs 111-116 in the uplink. Similarly, each of UEs 111-116 may implement a transmission path 200 for transmitting to gNBs 101-103 in the uplink, and may implement a reception path 250 for receiving from gNBs 101-103 in the downlink.

[0072] Each of the components in FIGs. 2a and 2b may be implemented using only hardware, or using a combination of hardware and software / firmware. As a specific example, at least some of the components in FIGs. 2a and 2b may be implemented in software, while other components may be implemented in configurable hardware or a combination of software and configurable hardware. For example, the FFT block 270 and IFFT block 215 may be implemented as configurable software algorithms, in which the value of the size N may be modified according to the implementation.

[0073] Furthermore, although described as using FFT and IFFT, this is only illustrative and should not be interpreted as limiting the scope of the present disclosure. Other types of transforms may be used, such as Discrete Fourier transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions. It should be understood that for DFT and IDFT functions, the value of variable N may be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N may be any integer which is a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0074] Although FIGs. 2a and 2b illustrate examples of wireless transmission and reception paths, various changes may be made to FIGs. 2a and 2b. For example, various components in FIGs. 2a and 2b may be combined, further subdivided or omitted, and additional components may be added according to specific requirements. Furthermore, FIGs. 2a and 2b are intended to illustrate examples of types of transmission and reception paths that may be used in a wireless network. Any other suitable architecture may be used to support wireless communication in a wireless network.

[0075] FIG. 3a illustrates an example UE 116 according to the present disclosure. The embodiment of UE 116 shown in FIG. 3a is for illustration only, and UEs 111-115 of FIG. 1 may have the same or similar configuration. However, a UE has various configurations, and FIG. 3a does not limit the scope of the present disclosure to any specific implementation of the UE.

[0076] UE 116 includes an antenna 301, a radio frequency (RF) transceiver 302, a transmission (TX) processing circuit 303, a microphone 304, and a reception (RX) processing circuit 305. UE 116 also includes a speaker 306, a controller / processor 307, an input / output (I / O) interface 308, an input device(s) 309, a display 310, and a memory 311. The memory 311 includes an operating system (OS) 312 and one or more applications 313.

[0077] The RF transceiver 302 receives an incoming RF signal transmitted by a gNB of the wireless network 100 from the antenna 301. The RF transceiver 302 down-converts the incoming RF signal to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is transmitted to the RX processing circuit 305, where the RX processing circuit 305 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. The RX processing circuit 305 transmits the processed baseband signal to speaker 306 (such as for voice data) or to controller / processor 307 for further processing (such as for web browsing data).

[0078] The TX processing circuit 303 receives analog or digital voice data from microphone 304 or other outgoing baseband data (such as network data, email or interactive video game data) from controller / processor 307. The TX processing circuit 303 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 302 receives the outgoing processed baseband or IF signal from the TX processing circuit 303 and up-converts the baseband or IF signal into an RF signal transmitted via the antenna 301.

[0079] The controller / processor 307 may include one or more processors or other processing devices and execute an OS 312 stored in the memory 311 in order to control the overall operation of UE 116. For example, the controller / processor 307 may control the reception of forward channel signals and the transmission of backward channel signals through the RF transceiver 302, the RX processing circuit 305 and the TX processing circuit 303 according to well-known principles. In some embodiments, the controller / processor 307 includes at least one microprocessor or microcontroller.

[0080] The controller / processor 307 is also capable of executing other processes and programs residing in the memory 311, such as operations for channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. The controller / processor 307 may move data into or out of the memory 311 as required by an execution process. In some embodiments, the controller / processor 307 is configured to execute the application 313 based on the OS 312 or in response to signals received from the gNB or the operator. The controller / processor 307 is also coupled to an I / O interface 308, where the I / O interface 308 provides UE 116 with the ability to connect to other devices such as laptop computers and handheld computers. I / O interface 308 is a communication path between these accessories and the controller / processor 307.

[0081] The controller / processor 307 is also coupled to the input device(s) 309 and the display 310. An operator of UE 116 may input data into UE 116 using the input device(s) 309. The display 310 may be a liquid crystal display or other display capable of presenting text and / or at least limited graphics (such as from a website). The memory 311 is coupled to the controller / processor 307. A part of the memory 311 may include a random access memory (RAM), while another part of the memory 311 may include a flash memory or other read-only memory (ROM).

[0082] Although FIG. 3a illustrates an example of UE 116, various changes may be made to FIG. 3a. For example, various components in FIG. 3a may be combined, further subdivided or omitted, and additional components may be added according to specific requirements. As a specific example, the controller / processor 307 may be divided into a plurality of processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Furthermore, although FIG. 3a illustrates that the UE 116 is configured as a mobile phone or a smart phone, UEs may be configured to operate as other types of mobile or fixed devices.

[0083] FIG. 3b illustrates an example gNB 102 according to the present disclosure. The embodiment of gNB 102 shown in FIG. 3b is for illustration only, and other gNBs of FIG. 1 may have the same or similar configuration. However, a gNB has various configurations, and FIG. 3b does not limit the scope of the present disclosure to any specific implementation of a gNB. It should be noted that gNB 101 and gNB 103 may include the same or similar structures as gNB 102.

[0084] As shown in FIG. 3b, gNB 102 includes a plurality of antennas 370a-370n, a plurality of RF transceivers 372a-372n, a transmission (TX) processing circuit 374, and a reception (RX) processing circuit 376. In certain embodiments, one or more of the plurality of antennas 370a-370n include a 2D antenna array. gNB 102 also includes a controller / processor 378, a memory 380, and a backhaul or network interface 382.

[0085] RF transceivers 372a-372n receive an incoming RF signal from antennas 370a-370n, such as a signal transmitted by UEs or other gNBs. RF transceivers 372a-372n down-convert the incoming RF signal to generate an IF or baseband signal. The IF or baseband signal is transmitted to the RX processing circuit 376, where the RX processing circuit 376 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. RX processing circuit 376 transmits the processed baseband signal to controller / processor 378 for further processing.

[0086] The TX processing circuit 374 receives analog or digital data (such as voice data, network data, email or interactive video game data) from the controller / processor 378. TX processing circuit 374 encodes, multiplexes and / or digitizes outgoing baseband data to generate a processed baseband or IF signal. RF transceivers 372a-372n receive the outgoing processed baseband or IF signal from TX processing circuit 374 and up-convert the baseband or IF signal into an RF signal transmitted via antennas 370a-370n.

[0087] The controller / processor 378 may include one or more processors or other processing devices that control the overall operation of gNB 102. For example, the controller / processor 378 may control the reception of forward channel signals and the transmission of backward channel signals through the RF transceivers 372a-372n, the RX processing circuit 376 and the TX processing circuit 374 according to well-known principles. The controller / processor 378 may also support additional functions, such as higher-level wireless communication functions. For example, the controller / processor 378 may perform a Blind Interference Sensing (BIS) process such as that performed through a BIS algorithm, and decode a received signal from which an interference signal is subtracted. A controller / processor 378 may support any of a variety of other functions in gNB 102. In some embodiments, the controller / processor 378 includes at least one microprocessor or microcontroller.

[0088] The controller / processor 378 is also capable of executing programs and other processes residing in the memory 380, such as a basic OS. The controller / processor 378 may also support channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. In some embodiments, the controller / processor 378 supports communication between entities such as web RTCs. The controller / processor 378 may move data into or out of the memory 380 as required by an execution process.

[0089] The controller / processor 378 is also coupled to the backhaul or network interface 382. The backhaul or network interface 382 allows gNB 102 to communicate with other devices or systems through a backhaul connection or through a network. The backhaul or network interface 382 may support communication over any suitable wired or wireless connection(s). For example, when gNB 102 is implemented as a part of a cellular communication system, such as a cellular communication system supporting 5G or new radio access technology or NR, LTE or LTE-A, the backhaul or network interface 382 may allow gNB 102 to communicate with other gNBs through wired or wireless backhaul connections. When gNB 102 is implemented as an access point, the backhaul or network interface 382 may allow gNB 102 to communicate with a larger network, such as the Internet, through a wired or wireless local area network or through a wired or wireless connection. The backhaul or network interface 382 includes any suitable structure that supports communication through a wired or wireless connection, such as an Ethernet or an RF transceiver.

[0090] The memory 380 is coupled to the controller / processor 378. A part of the memory 380 may include an RAM, while another part of the memory 380 may include a flash memory or other ROMs. In certain embodiments, a plurality of instructions, such as the BIS algorithm, are stored in the memory. The plurality of instructions are configured to cause the controller / processor 378 to execute the BIS process and decode the received signal after subtracting at least one interference signal determined by the BIS algorithm.

[0091] As will be described in more detail below, the transmission and reception paths of gNB 102 (implemented using RF transceivers 372a-372n, TX processing circuit 374 and / or RX processing circuit 376) support aggregated communication with FDD cells and TDD cells.

[0092] Although FIG. 3b illustrates an example of gNB 102, various changes may be made to FIG. 3b. For example, gNB 102 may include any number of each component shown in FIG. 3a. As a specific example, the access point may include many backhaul or network interfaces 382, and the controller / processor 378 may support routing functions to route data between different network addresses. As another specific example, although shown as including a single instance of the TX processing circuit 374 and a single instance of the RX processing circuit 376, gNB 102 may include multiple instances of each (such as one for each RF transceiver).

[0093] The exemplary embodiments of the present disclosure are further described below in conjunction with the accompanying drawings.

[0094] The text and drawings are provided as examples only to help readers understand the present disclosure. They are not intended and should not be interpreted as limiting the scope of the present disclosure in any way. Although certain embodiments and examples have been provided, based on the content disclosed herein, it is obvious to those skilled in the art that modifications to the illustrated embodiments and examples may be made without departing from the scope of the present disclosure.

[0095] A time domain unit (also referred to as a time unit) in the present application may be: an OFDM symbol, an OFDM symbol group (consisting of more than one OFDM symbols), a slot, a slot group (consisting of more than one slots), a subframe, a subframe group (consisting of more than one subframes), a system frame, a system frame group (consisting of more than one system frames); also an absolute time unit, such as 1 millisecond, 1 second, etc.; and the time unit may also be a combination of more than one granularities, e.g., N1 slots plus N2 OFDM symbols; also a time length of an OOK chip.

[0096] A frequency domain unit (also referred to as a frequency unit) in the present application may be: a subcarrier, a subcarrier group (consisting of more than one subcarriers), a resource block (RB) (which may also be referred to as a physical resource block (PRB)), a resource block group (consisting of more than one RBs), a bandwidth part (BWP), a bandwidth part group (consisting of more than one BWPs), a band / carrier, a band group / carrier group; also an absolute frequency domain unit, such as 1 hertz, 1 kilohertz, etc.; and the frequency domain unit may also be a combination of more than one granularities, e.g., M1 PRBs plus M2 subcarriers.

[0097] A transmission link of a wireless communication system mainly includes: a downlink communication link from a 5G New Radio (NR) gNB to a user equipment (UE), an uplink communication link from a UE to a network, and a sidelink communication link from a UE to a UE.

[0098] In wireless communication systems, such as in current wireless communication systems, in order to reduce energy consumption on a terminal side, a Discontinuous Reception (DRX) mechanism is introduced. In a radio resource control (RRC) inactive state and / or idle state, a DRX cycle is equal to a paging cycle, and a UE monitors a paging occasion (PO) in each DRX cycle, and in each DRX cycle, the UE is in a sleep state and does not need to monitor a PDCCH at most of the time except the paging occasion. When the UE monitors a PDCCH scrambled by a P-RNTI in the corresponding PO, the UE continues to read a paged terminal identifier in a paging message. If the read terminal identifier is the same as its own identifier, the UE further reads the paging message, otherwise, it discards the paging message. In the above procedure, in order to further reduce energy consumption of the UE, a Paging Early Indication (PEI) signal is introduced to indicate whether the UE needs to monitor the corresponding PO. If the PEI is configured by system information, the UE monitors a PEI occasion once in each DRX cycle, and if the UE detects the PEI indication and the PEI indicates the UE to monitor the associated PO, the UE should wake up in an associated PO to monitor the PO; otherwise, the UE does not need to wake up to monitor the PO. In a radio resource control (RRC) connected state, each DRX cycle includes an active time and a non-active time. During the active time, the UE is required to monitor the PDCCH, and during the non-active time, the UE is only required to monitor the PDCCH carrying Downlink Control Information (DCI) 2-6, and is not required to monitor other PDCCHs. The UE starts drx-onDurationTimer (DRX on duration timer, which may also be referred to as a first timer herein) at a starting position of each DRX cycle to start monitoring the Physical Downlink Control Channel (PDCCH). The UE acquires a Power Saving-Radio Network Temporary Identifier (PS-RNTI) through RRC configuration. The PDCCH carrying DCI 2-6 is monitored during the DRX non-active time, and if the UE detects that the PS-RNTI carried by the PDCCH is the same as the PS-RNTI configured by RRC, the UE determines that the PDCCH is DCI 2-6, and the UE further reads the DCI message, and determines whether to start drx-onDurationTimer.

[0099] In some use cases with stricter UE low energy consumption requirements (such as Internet of Things devices and / or wearable devices), in order to further extend the battery life of the UE, the wireless communication system may use a new low power wake up signal (Low Power Wake Up Signal, LPWUS) to wake up the UE. Therefore, the process of receiving LPWUS needs to be further improved.

[0100] In embodiments of the present disclosure, a method for determining a subcarrier spacing of a wake up signal, a method for determining a quasi-co-location relationship between wake up signals, a method for requesting to acquire synchronization signal transmission, and a method for determining a resource of a monitoring occasion for the wake up signal will be introduced. In the embodiment, a wake up signal is used for an exemplary introduction, where the wake up signal includes but is not limited to the LPWUS signal, and the introduced method may also be used for configuration and transmission of other signals.

[0101] A receiver of the UE includes two modules, one is a main wireless communication module (Main Radio, MR) for receiving regular signals / channels transmitted by a base station, and the other is a low power wake up signal receiving module (Lower Power Wake Up Receiver, LPWUR) for receiving the wake up signal transmitted by the base station and a first synchronization signal for synchronization of the wake up signal. The dedicated module is used to receive the wake up signal because the LPWUS is a waveform modulated further based on amplitude shift keying (ASK) on the basis of using the orthogonal frequency division multiplexing (OFDM) based waveform of the existing NR system, the LPWUR may monitor the wake up signal with extremely low power. Once the UE monitors the wake up signal, the LPWUR may trigger the MR to switch from the dormant time to the active time, and monitor PEI and / or PO. Optionally, On-Off Keying (OOK) modulation is a special case of amplitude shift keying (ASK) modulation. The LPWUR includes two different types of receivers: an OOK-based receiver that performs synchronization and Radio Resource Management (RRM) measurement based on a Low Power-Synchronization Signal (LP-SS) and an OFDM-based receiver that performs synchronization and RRM measurement based on an SSB. The first synchronization signal includes the LP-SS and / or the SSB and / or a Secondary Synchronization Signal (SSS), where a receiver based on an OFDM architecture may perform RRM measurement and synchronization for the wake up signal through the SSB and / or the SSS, and a receiver based on an OOK architecture may perform RRM measurement and synchronization for the wake up signal through the LP-SS.

[0102] FIG. 4 illustrates a flowchart of a method performed by a UE according to various embodiments of the present disclosure.

[0103] Referring to FIG. 4, in step S401, the UE may receive first configuration information related to a first bandwidth part (BWP) or second configuration information related to a synchronization signal and physical broadcast channel block (SSB), where the first configuration information includes information related to a frequency domain location of the first BWP and the second configuration information includes information related to a frequency domain location of the SSB.

[0104] In step S402, the UE may receive third configuration information related to a first signal for waking up the UE and / or a second signal for synchronization of the first signal, where the third configuration information includes information related to a frequency domain location of the first signal and / or a frequency domain location of the second signal.

[0105] In step S403, the UE may determine, based on the first configuration information or the second configuration information and based on the third configuration information, a subcarrier spacing (SCS) of the first signal and / or an SCS of the second signal.

[0106] In an embodiment, if the SSB (SS / PBCH Block) and the wake up signal and / or the first synchronization signal are configured on the same carrier, and / or the wake up signal and / or the first synchronization signal are configured in an initial DL BWP, the Subcarrier spacing (SCS) of the wake up signal and / or the first synchronization signal is the same as the SCS of the SSB. The SCSs of the SSB and the initial DL BWP may be the same or different. The operation allows the SSB to provide more accurate synchronization accuracy for the receiver of the OFDM architecture to receive the wake up signal. Even if the SCSs of the SSB and the initial DL BWP are different, the UE will still expect to monitor the SSB first before starting the MR to monitor the PDCCH after receiving the wake up signal. The operation will not cause an additional wake up delay.

[0107] In an implementation, if the SSB and the wake up signal and / or the first synchronization signal are configured on different carriers, and / or the wake up signal and / or the first synchronization signal are configured outside the initial DL BWP, the SCSs of the wake up signal and the first synchronization signal are the same, and the SCS of the first synchronization signal is determined based on configuration of the base station. The operation has better flexibility, and the configuration of the SCS may be adjusted individually for different scenarios and requirements to improve the good detection performance of the wake up signal and / or the first synchronization signal.

[0108] In an implementation, if the SSB and the wake up signal and / or the first synchronization signal are configured on different carriers, and / or the wake up signal and / or the first synchronization signal are configured outside the initial DL BWP, the SCSs of the wake up signal and the first synchronization signal are the same, and the SCS of the first synchronization signal is the same as the SCS of the initial DL BWP. The operation avoids the wake up signal and / or the first synchronization signal being configured with a third SCS configuration that is different from SSB and different from the initial DL BWP, and avoids failing to align with resource grids of the SSB and the initial DL BWP due to different SCSs.

[0109] In an implementation, when the SCSs of the SSB and the initial DL BWP are different, the SCSs of the wake up signal and / or the first synchronization signal are the same as max(SCS of SSB, SCS of initial DL BWP). The operation is performed because the larger the subcarrier spacing, the larger the supported cell radius, which can improve the coverage of the wake up signal and / or the first synchronization signal to a certain extent. In addition, a large subcarrier spacing corresponds to a shorter slot, and a shorter time domain duration may be applied to transmit the wake up signal and / or the first synchronization signal. For example, a shorter LO duration improves transmission efficiency.

[0110] In an implementation, for the initial DL BWP indicated in the initial downlink BWP of a Reduced capability (Redcap) UE configured by an SIB, if the UE is in an RRC Idle state or RRC Inactive state, a PDCCH is monitored according to a Type1-CSS (Common Search Space) set, but not according to a Type2-CSS set, and the UE does not expect the initial DL BWP to include the SSB and control resource set (CORESET) (for example, CORESET0). At this time, the SCSs of the wake up signal and / or the first synchronization signal have a same SCS with the initial DL BWP including the SSB and CORESET0 or of the SSB, for example, the same as the SCS of the initial DL BWP configured by the SIB or of the SSB in the initial DL BWP that is not configured specifically for the Redcap user and / or the initial DL BWP. The operation avoids monitoring of the wake up signal and / or the first synchronization signal on the initial DL BWP that does not include the SSB and CORESET0.

[0111] In an implementation, in the RRC connected state, the UE only monitors the wake up signal in the BWP including the SSB, for example, the wake up signal is configured in the BWP, which is an initial DL BWP or an active DL BWP. When the UE monitors the wake up signal, BWP switching is not expected to occur. The operation allows the receiver of the wake up signal to perform synchronization of the wake up signal using SSB. In addition, considering that BWP switching will cause an increase in receiver complexity, avoiding performing BWP switching during reception of the wake up signal can reduce receiver complexity and wireless power consumption caused by radio frequency (RF) adjustment.

[0112] In an implementation, the SCS of the wake up signal is consistent with the SCS of the PDCCH. For example, if a bandwidth of the active DL BWP overlaps with a bandwidth of CORESET0 and if the SCS of the active DL BWP is consistent with the SCS of the CORESET0, the SCS of the wake up signal is consistent with the SCS of the initial DL BWP and / or CORESET0, otherwise, the SCS of the wake up signal is consistent with the SCS of the active DL BWP and / or PDCCH CORESET. The operation maintains the wake up signal consistent with the SCS of the current BWP, which avoids an additional wake up delay caused by misalignment of time-frequency resource grids.

[0113] In an implementation, when the wake up signal and the SSB are configured in the same active DL BWP, the SCS of the wake up signal is consistent with the SCS of the SSB. The operation allows the SSB to provide more accurate synchronization accuracy for receiving the wake up signal.

[0114] In an implementation, the SCS of the wake up signal is greater than or equal to the SCS of the SSB, or the SCS of the wake up signal is not less than the SCS of the SSB. For example, the SCS of the wake up signal is 30kHz and the SCS of the SSB is 15kHz. The operation allows the UE to use the SSB with a small SCS but high synchronization accuracy to provide synchronization for the wake up signal with a large SCS, and reduces the duration of time domain resources when transmitting the same information bits, thereby improving transmission efficiency.

[0115] In an implementation, if the SCS of the wake up signal is not consistent with the SCS of the SSB, the SCS associated with the wake up delay value of the MR is determined based on the SCS of the SSB. The operation considers that after the MR is woken up, it will first detect the SSB for synchronization of the MR and RRM measurement, and when the SCS of the wake up signal is not consistent with the SCS of the SSB, an additional RF retuning delay is required.

[0116] In an implementation, if the SCS of the wake up signal is not consistent with the SCS of the initial DL BWP, the SCS associated with the wake up delay value of the MR is determined based on the SCS of the initial DL BWP. The operation considers that the wake up signal is used to trigger paging monitoring, the SCS of the PDCCH is the same as the SCS of the initial DL BWP, and the RF retuning delay may be determined based on the SCS of the initial DL BWP.

[0117] In an implementation, if the SCS of the wake up signal is not consistent with the SCS of the active DL BWP, the SCS associated with the wake up delay value of the MR is determined based on the SCS of the active DL BWP. The operation considers that the wake up signal is used to trigger PDCCH monitoring, the SCS of the PDCCH is the same as the SCS of the active DL BWP, and the RF retuning delay may be determined based on the SCS of the active DL BWP.

[0118] In an implementation, the SCS associated with the wake up delay value of the MR is determined based on the SCS of the wake up signal. The operation considers that the wake up delay does not include an additional RF retuning delay caused by the inconsistency of the SCS of the wake up signal and the SCS of the SSB or BWP or PDCCH, and at this time, the UE determines the unique associated wake up delay through the SCS of the wake up signal.

[0119] In an implementation, the SSB is a cell defined SSB.

[0120] In an embodiment, in the RRC INACTIVE / IDLE state, there is a quasi-co-location (QCL) relationship between each wake up signal and / or first synchronization signal and an associated SSB, and the method for determining the QCL relationship includes one or a combination of more of:

[0121] if the SSB and the wake up signal and / or the first synchronization signal are configured on the same carrier, and / or the wake up signal and / or the first synchronization signal are configured in the initial DL BWP, and / or the SSB and the wake up signal have the same SCS, and / or the SSB and the wake up signal have the same center frequency or bandwidth, the QCL relationship between each wake up signal and / or first synchronization signal and an associated SSB being Type A; the operation ensures the same delay spread and Doppler spread only when the SSB and the wake up signal and / or the first synchronization signal are at the same frequency point and / or have the same SCS, which requires the LPWUS receiver of the OFDM architecture to use the same RF chain or antenna to receive the LPWUS and the SSS in SSB to ensure the QCL relationship of Type A;

[0122] if the SSB and the wake up signal and / or the first synchronization signal are configured on different carriers, and / or the wake up signal and / or the first synchronization signal are configured outside the initial DL BWP, and / or the SSB and the wake up signal have different SCSs, and / or the SSB and the wake up signal have different center frequencies or bandwidths, the QCL relationship between each wake up signal and / or first synchronization signal and an associated SSB being Type C; the operation enables the UE to infer the Doppler shift and average delay of the channel of the wake up signal and / or the first synchronization signal through channel measurements of the SSB.

[0123] In an implementation, in the RRC CONNECTED state, each wake up signal and an associated SSB and / or a channel state information (CSI)-reference signal (RS) are QCLed, and the method for determining the QCL relationship includes one or a combination of more of:

[0124] if the SSB and the wake up signal are configured on the same carrier, and / or the wake up signal is configured in the active DL BWP, and / or the SSB and the wake up signal have the same SCS, and / or the SSB and the wake up signal have the same center frequency or bandwidth, the QCL relationship between each wake up signal and an associated SSB being Type A; the operation ensures the same delay spread and Doppler spread only when the SSB and the wake up signal are at the same frequency point and / or have the same SCS and / or have the same bandwidth;

[0125] if the SSB and the wake up signal are configured on different carriers, and / or the wake up signal is configured outside the active DL BWP, and / or the SSB and the wake up signal have different SCSs, and / or the SSB and the wake up signal have different center frequencies or bandwidths, the QCL relationship between each wake up signal and an associated SSB being Type C; the operation enables the UE to infer the Doppler shift and average delay of the channel of the wake up signal through channel measurement of the SSB;

[0126] if the CSI-RS and the wake up signal are configured on the same carrier, and / or the wake up signal is configured in the active DL BWP, and / or the CSI-RS and the wake up signal have the same SCS, and / or the CSI-RS and the wake up signal have the same center frequency or bandwidth, the QCL relationship between each wake up signal and an associated CSI-RS being Type A; the operation ensures the same delay spread and Doppler spread only when the CSI-RS and the wake up signal are at the same frequency point and / or have the same SCS and / or have the same bandwidth;

[0127] if the CSI-RS and the wake up signal are configured on different carriers, and / or the wake up signal is configured outside the active DL BWP, and / or the CSI-RS and the wake up signal have different SCSs, and / or the CSI-RS and the wake up signal have different center frequencies or bandwidths, the QCL relationship between each wake up signal and an associated CSI-RS being Type C; the operation enables the UE to infer the Doppler shift and average delay of the channel of the wake up signal through channel measurements of the CSI-RS.

[0128] In an embodiment, the network may configure a second synchronization signal for synchronization of the wake up signal. The second synchronization signal is a sequence transmitted in conjunction with the wake up signal, the period of the second synchronization signal is the same as the period of the wake up signal, and / or an OOK sequence and / or overlaid OFDM sequence of the second synchronization signal is the same as those of the first synchronization signal. The operation is suitable for situations where the configured period of the first synchronization signal is too long to satisfy requirement of the synchronization accuracy.

[0129] In an implementation, the second synchronization signal may be configured through RRC signaling, and the second synchronization signal and the wake up signal are mapped to consecutive OFDM symbols or slots, or the second synchronization signal and the wake up signal are mapped to non-consecutive OFDM symbols, between which only OFDM symbols for PDCCH transmission are reserved. If the second synchronization signal is activated, the UE first receives the second synchronization signal for synchronization of the wake up signal, and then detects the wake up signal on time-frequency resources related to the wake up signal to determine whether the UE is woken up to monitor the PDCCH.

[0130] In an implementation, if a first condition is satisfied, the UE determines that it is in a downlink out-of-sync state, and / or the UE transmits a request signal through the UL SDT or Msg 1 or Msg 3 or MAC layer to activate the resource of the second synchronization signal. The operation can improve the synchronization accuracy of wake up signal detection, which is suitable for situations where the configured period of the first synchronization signal is too long to satisfy requirement of the synchronization accuracy. The first condition includes one or a combination of more of:

[0131] a reference signal received strength measured based on the first synchronization signal is below a threshold value P1 and / or a reference signal received quality measured based on the first synchronization signal is below a threshold value Q1. The UE determines that the UE is in a synchronization or out-of-sync state by comparing the reference signal received strength and / or the reference signal received quality measured based on the first synchronization signal with a predefined or preconfigured decision threshold. For example, when the reference signal received strength measured based on the first synchronization signal is below the threshold value P1 and / or the reference signal received quality measured based on the first synchronization signal is below the threshold value Q1, the UE is in the out-of-sync state; when the reference signal received strength measured based on the first synchronization signal is above a threshold value P2 and / or the reference signal received quality measured based on the first synchronization signal is above a threshold value Q2, a physical layer of the UE reports to a higher layer that the UE is in the in-sync state currently. P1, P2, Q1, and Q2 are predefined or preconfigured parameter values. In an optional case, P1 = P2, Q1 = Q2. The operation may decide that the UE is in the in-sync state or the out-of-sync state through a same threshold value;

[0132] the reference signal received strength measured based on the first synchronization signal is above a threshold value T1 for exiting monitoring of the wake up signal, and / or the reference signal received quality measured based on the first synchronization signal is above a threshold value T2 for exiting the monitoring of the wake up signal, where T1 and T2 are predefined or preconfigured parameter values. The operation is suitable for scenarios where the wake up signal is determined to be in the coverage of the base station through UE measurements, but the synchronization accuracy is limited due to the too long period of the first synchronization signal. In the scenario, the UE may transmit a request to the network to activate the resource of the second synchronization signal;

[0133] the reference signal received strength measured based on the first synchronization signal is increased or decreased by more than a threshold value C1 compared with a reference signal received strength for reference, and / or the reference signal received quality measured based on the first synchronization signal is increased or decreased by more than a threshold value C2 compared with a reference signal received quality for reference, where C1 and C2 are predefined or preconfigured parameter values. The reference signal received strength for reference is a predefined or preconfigured threshold value T3 for enabling the monitoring of the wake up signal. If the reference signal received strength (RSRP) measured by the LPWUR based on the first synchronization signal is greater than or equal to the threshold value T3, the UE enables the monitoring of the wake up signal. If the RSRP measured by the LPWUR based on the first synchronization signal is less than the threshold value T3, the UE does not monitor the wake up signal. The reference signal received quality for reference is a predefined or preconfigured threshold value T4 for enabling the monitoring of the wake up signal. If the reference signal received quality (RSRQ) measured by the LPWUR based on the first synchronization signal is greater than or equal to the threshold value T4, the UE enables the monitoring of the wake up signal. If the RSRQ measured by the LPWUR based on the first synchronization signal is less than the threshold value T3, the UE does not monitor the wake up signal. The operation is suitable for situations where the UE is determined, through UE measurements, to be out of synchronization due to too fast movement speed;

[0134] N consecutive out-of-sync indications from the physical layer being received. At this time, since the configured period of the first synchronization signal cannot satisfy the synchronization accuracy of detecting the wake up signal, downlink is out of synchronization. Therefore, the UE needs to request the second synchronization signal from the network to satisfy the synchronization accuracy of detecting the wake up signal. N is a preconfigured or predefined parameter value;

[0135] the wake up signal failing to be successfully decoded for X consecutive time units, where X is a predefined or preconfigured parameter value. The operation can avoid the UE from exiting the monitoring of the wake up signal due to insufficient synchronization accuracy;

[0136] when the UE is in the out-of-sync state, the physical layer of the UE reports to the higher layer an indication related to the UE being in the out-of-sync state currently. Optionally, the indication may be 1-bit information. When a value of the indication is '1', it indicates that the UE is in the out-of-sync state. When the UE is in the out-of-sync state, the UE transmits a request signal through the UL SDT or Msg 1 or Msg 3 or MAC layer to activate the resource of the second synchronization signal.

[0137] In an implementation, if the first condition and a second condition are satisfied, the UE determines that it is in a downlink out-of-sync state, and / or the UE transmits a request through UL SDT or Msg 1 or Msg 3 or MAC layer to activate the resource of the second synchronization signal. The second condition may include at least one of:

[0138] before a timer with a predefined or preconfigured length expires, Y wake up signals failing to be successfully decoded. When the first condition is satisfied, a timer with a predefined or preconfigured length is started. If Y wake up signals are not successfully decoded before the timer expires, the UE transmits a request through the UL SDT or Msg 1 or Msg 3 or MAC layer to activate the resource of the second synchronization signal; if Y wake up signals are successfully decoded before the timer expires, after Y wake up signals are successfully decoded, the timer is stopped and the UE determines that the LPWUR is in the in-sync state, where Y is a predefined or preconfigured parameter value;

[0139] before the timer with the predefined or preconfigured length expires, an average value of RSRP of the first synchronization signal measured during the timer duration being below a preconfigured or predefined threshold value and / or above a threshold value T3 for enabling the monitoring of the wake up signal, and / or an average value of RSRQ of the first synchronization signal measured during the timer duration being below a preconfigured or predefined threshold value and / or above a threshold value T4 for enabling the monitoring of the wake up signal, where the preconfigured or predefined threshold value is used to decide that the UE is in the in-sync or out-of-sync state;

[0140] before the timer with the predefined or preconfigured length expires, the average RSRP of the first synchronization signal measured during the timer duration is increased or decreased by more than a preconfigured or predefined threshold value compared with the reference signal received strength for reference, and / or the average RSRQ of the first synchronization signal measured during the timer duration is increased or decreased by more than a preconfigured or predefined threshold value compared with the reference signal received quality for reference.

[0141] In an implementation, the UE transmits a request signal through the UL SDT or Msg 1 or Msg 3 or MAC layer to activate the resource of the second synchronization signal, the UE determines the activation of the second synchronization signal by receiving a MAC CE or DCI indication, or the UE determines whether there is second synchronization signal transmission on the configured resource of the second synchronization signal through blind detection.

[0142] In an embodiment, one monitoring occasion (MO) for the wake up signal includes one or more slots for transmitting an information bit block of the wake up signal. When a number of slots occupied by the monitoring occasion for the wake up signal is greater than 1, where the number of slots is calculated based on a number C of CRC and / or a number B of information bits carried by the wake up signal and / or a Manchester coding rate R and a value M of a number of OOK bits of the wake up signal transmitted by an OFDM symbol, for example, when (B + C) / (S * M) > L or B / (S * M) + C > L, the UE determines that one monitoring occasion for the wake up signal includes multiple slots, and the one monitoring occasion for the wake up signal is used to transmit an information bit block of the LPWUS, where L is a predefined or preconfigured value.

[0143] In an implementation, L = 12. The operation is to reserve OFDM symbols #0 and #1 in each slot for PDCCH transmission.

[0144] In an implementation, L is determined according to the configuration of the PDCCH and is equal to 14 OFDM symbols minus OFDM symbols configured for the PDCCH. The operation is to avoid overlapping of the wake up signal and configured PDCCH on the same OFDM symbol in each slot.

[0145] In an implementation, a duration of one MO is determined according to the number C of CRC and / or the number B of information bits carried by one LPWUS and / or the Manchester coding rate S and the value M, and may be equal to a number sup((B + C) / (S * M) / L) or sup((B / (S * M) + C) / L) of slots, for example, where sup denotes rounding up.

[0146] In an implementation, when one monitoring occasion for the wake up signal includes multiple time units, the wake up signal is transmitted using consecutive OFDM symbols or slots in each time unit, and index of the OFDM symbols or slots transmitting the wake up signal in different time units are the same. If the OFDM symbols or slots used for wake up signal transmission collide with an uplink signal or channel in any time unit, the time unit is not counted in which the collision occurs, and the collided wake up signal will be postponed to the next time unit for transmission.

[0147] In an implementation, when one monitoring occasion for the wake up signal includes multiple slots, the wake up signal is transmitted using consecutive OFDM symbols in each slot, and the OFDM symbols transmitting the wake up signal in different slots are the same. If the OFDM symbols used for wake up signal transmission collide with an uplink signal or channel in any slot, the slot is not counted in which the collision occurs, and the wake up signal slot in which the collision occurs will be postponed to the next slot for transmission.

[0148] In an implementation, when one monitoring occasion for the wake up signal includes multiple slots, overlaid OFDM sequence in one slot carries all the information bits of the wake up signal transmitted across slots, and an OFDM based receiver may acquire all the information bits of the wake up signal by receiving all or part of the overlaid OFDM sequences transmitted in any slot. After the UE detects the wake up signal, the UE no longer monitors resources of the subsequent wake up signals. The operation can enable the UE to acquire all the information bits carried by the wake up signal faster, and reduce the detection delay of the wake up signal. The UE can acquire all the information bits of the wake up signal through the overlaid OFDM sequence of any slot, and the UE can acquire more channel diversity gain.

[0149] In an implementation, when one monitoring occasion for the wake up signal includes multiple slots, the overlaid OFDM sequence on the i-th OOK 'ON' symbol / chip in each of the slots is the same, where i is a real number greater than or equal to 0. The operation is suitable for situations where the wake up signal uses Manchester coding, and each information bit is represented by a high level and a low level. The usage of the same overlaid OFDM sequence on the same OOK 'ON' symbol / chip on the same OFDM symbol in each slot can enable the UE to only monitor part of the OFDM symbols in one slot to acquire all the information bits carried by the wake up signal, and reduce the detection delay of the wake up signal. The UE can acquire all the information bits of the wake up signal through the overlaid OFDM sequence with the same OFDM symbol index in any slot, and the UE can acquire more channel diversity gain.

[0150] In another implementation, when one monitoring occasion for the wake up signal includes multiple slots, the overlaid OFDM sequence in each slot carries all the information bits of the wake up signal transmitted in the current slot, and the OFDM based receiver can acquire all the information bits of the wake up signal through overlaid OFDM sequence transmitted in all slots. For example, starting from a starting OFDM symbol of the wake up signal transmission in each slot, the UE can acquire all the information bits of the wake up signal transmitted in the current slot by receiving overlaid OFDM sequence in the starting OFDM symbol. The operation can enable a UE that can receive the overlaid OFDM sequence to detect the wake up signal only in the starting OFDM symbol of the wake up signal transmission in each of the multiple slots to acquire information bits of the wake up signal transmitted in the current slot. While reducing the detection delay, the detection complexity of overlaid OFDM sequence is reduced.

[0151] FIG. 5 illustrates a flowchart of a method performed by a base station according to various embodiments of the present disclosure.

[0152] Referring to FIG. 5, in step S501, the base station may transmit first configuration information related to a first bandwidth part (BWP) or second configuration information related to a synchronization signal and physical broadcast channel block (SSB), where the first configuration information includes information related to a frequency domain location of the first BWP and the second configuration information includes information related to a frequency domain location of the SSB.

[0153] In step S502, the base station may transmit third configuration information related to a first signal for waking up a user equipment (UE) and / or a second signal for synchronization of the first signal, where the third configuration information includes information related to a frequency domain location of the first signal and / or a frequency domain location of the second signal. The first configuration information or the second configuration information, and the third configuration information may be used to determine a subcarrier spacing (SCS) of the first signal and / or an SCS of the second signal.

[0154] FIG. 6 illustrates a block diagram of a user equipment (UE) 600 according to various embodiments of the present disclosure.

[0155] Referring to FIG. 6, the UE 600 according to various embodiments of the present disclosure may include a transceiver 601 and a controller 602. For example, the transceiver 601 may be configured to transmit and receive signals. For example, the controller 602 may be coupled to the transceiver 601 and configured to perform the aforementioned methods.

[0156] FIG. 7 illustrates a block diagram of a base station 700 according to various embodiments of the present disclosure.

[0157] Referring to FIG. 7, the base station 700 according to various embodiments of the present disclosure may include a transceiver 701 and a controller 702. For example, the transceiver 701 may be configured to transmit and receive signals. For example, the controller 702 may be coupled to the transceiver 701 and configured to perform the aforementioned methods.

[0158] Those skilled in the art will understand that the above illustrative embodiments are described herein and are not intended to be limiting. It should be understood that any two or more of the embodiments disclosed herein may be combined in any combination. Furthermore, other embodiments may be utilized and other changes may be made without departing from the spirit and scope of the subject matter presented herein. It will be readily understood that aspects of the disclosure as generally described herein and shown in the drawings may be arranged, replaced, combined, separated and designed in various different configurations, all of which are contemplated herein.

[0159] Those skilled in the art will understand that the various illustrative logical blocks, modules, circuits, and steps described in the present application may be implemented as hardware, software, or a combination of both. To clearly illustrate this interchangeability between hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above in the form of their functional sets. Whether such function sets are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. Technicians may implement the described functional sets in different ways for each specific application, but such design decisions should not be interpreted as causing a departure from the scope of the present application.

[0160] The various illustrative logic blocks, modules, and circuits described in the present application may be implemented or performed by a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logics, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general purpose processor may be a microprocessor, but in an alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, more than one microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration.

[0161] The steps of the method or algorithm described in the present application may be embodied directly in hardware, in a software module executed by a processor, or in a combination thereof. The software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, register, hard disk, removable disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor to enable the processor to read and write information from / to the storage media. In an alternative, the storage medium may be integrated into the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In an alternative, the processor and the storage medium may reside in the user terminal as discrete components.

[0162] In one or more exemplary designs, the functions may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, each function may be stored as one or more pieces of instructions or codes on a computer-readable medium or delivered through it. The computer-readable medium includes both a computer storage medium and a communication medium, the latter including any medium that facilitates the transfer of computer programs from one place to another. The storage medium may be any available medium that can be accessed by a general purpose or special purpose computer.

[0163] The above description is only an exemplary implementation of the present disclosure, and is not intended to limit the scope of protection of the present disclosure, which is determined by the appended claims.

Claims

1.A method performed by a user equipment (UE) in a wireless communication system, the method comprising:receiving first configuration information related to a first bandwidth part (BWP) or second configuration information related to a synchronization signal / physical broadcast channel (SS / PBCH) block, wherein the first configuration information includes information related to a frequency domain location of the first BWP and the second configuration information includes information related to a frequency domain location of the SS / PBCH block;receiving third configuration information related to at least one of a first signal for waking up the UE or a second signal for synchronization of the first signal, wherein the third configuration information includes information related to at least one of a frequency domain location of the first signal or a frequency domain location of the second signal; anddetermining, based on the first configuration information or the second configuration information and based on the third configuration information, at least one of a subcarrier spacing (SCS) of the first signal or an SCS of the second signal.2.The method of claim 1, further comprising:determining, based on the first configuration information or the second configuration information and based on the third configuration information, at least one of a quasi-co-location (QCL) relationship between the first signal and the SS / PBCH block or a QCL relationship between the second signal and the SS / PBCH block.3.The method of claim 1, further comprising at least one of:determining, based on the first configuration information and the third configuration information, a first relationship between the frequency domain location of the first signal and / or the frequency domain location of the second signal and the frequency domain location of the first BWP;determining, based on the second configuration information and the third configuration information, a second relationship between the frequency domain location of the first signal and / or the frequency domain location of the second signal and the frequency domain location of the SS / PBCH block.4.The method of claim 3, wherein the first relationship is determined based on at least one of:the first signal and / or the second signal configured inside the first BWP,the first signal and / or the second signal configured outside the first BWP, andwherein the second relationship is determined based on at least one of:the first signal and / or the second signal being on a same carrier as the SS / PBCH block,the first signal and / or the second signal being on a different carrier than the SS / PBCH block.5.The method of claim 4, further comprising at least one of:determining that the SCS of the first signal and / or the SCS of the second signal have a same SCS with the SS / PBCH block, if the first signal and / or the second signal are inside the first BWP or the first signal and / or the second signal are on the same carrier as the SS / PBCH block;determining that the SCS of the first signal and / or the SCS of the second signal are a maximum SCS among the SCS of the SS / PBCH block and an SCS of the first BWP, if the SCS of the SS / PBCH block is different from the SCS of the first BWP;determining that the SCS of the first signal and / or the SCS of the second signal have a same SCS with the first BWP comprising the SS / PBCH block and a control resource set or the SCS of the SS / PBCH block, if the UE is in a radio resource control (RRC) idle state or an RRC inactive state;determining that the SCS of the first signal is the same as the SCS of the first BWP and / or an SCS of a control resource set, if a bandwidth of a second BWP overlaps with a bandwidth of the control resource set and an SCS of the second BWP is the same as the SCS of the control resource set;determining that the SCS of the first signal is the same as the SCS of the second BWP and / or the SCS of the control resource set, if the bandwidth of the second BWP does not overlap with the bandwidth of the control resource set or the SCS of the second BWP is different from the SCS of the control resource set;determining that the SCS of the first signal is the same as the SCS of the SS / PBCH block, if the first signal and the SS / PBCH block are inside a same second BWP.6.The method of claim 1, further comprising at least one of:determining that an SCS associated with a wake up delay value is determined based on an SCS of the SS / PBCH block, if the SCS of the first signal is different from the SCS of the SS / PBCH block;determining that the SCS associated with the wake up delay value is determined based on an SCS of the first BWP, if the SCS of the first signal is different from the SCS of the first BWP;determining that the SCS associated with the wake up delay value is determined based on an SCS of the second BWP, if the SCS of the first signal is different from the SCS of the second BWP;determining that the SCS associated with the wake up delay value is determined based on the SCS of the first signal,wherein the wake up delay value corresponds to an SCS one by one.7.The method of claim 4, further comprising performing, in a radio resource control (RRC) idle state or an RRC inactive state, at least one of:determining that the QCL relationship between the first signal and / or the second signal and the SS / PBCH block is a first type, if the first signal and / or the second signal are on a same carrier and / or the first signal and / or the second signal are inside the first BWP;determining that the QCL relationship between the first signal and / or the second signal and the SS / PBCH block is a second type, if the first signal and / or the second signal are on different carriers and / or the first signal and / or the second signal are outside the first BWP.8.The method of claim 4, further comprising performing, in a radio resource control (RRC) connected state, at least one of:determining that the QCL relationship between the first signal and the SS / PBCH block is a first type, if the first signal and / or the SS / PBCH block are on a same carrier and / or the first signal is inside a second BWP;determining that the QCL relationship between the first signal and the SS / PBCH block is a second type, if the first signal and / or the SS / PBCH block are on different carriers and / or the first signal is outside the second BWP;determining that a QCL relationship between the first signal and a channel state information (CSI)-reference signal (RS) is the first type, if the first signal and / or the CSI-RS are on a same carrier and / or the first signal is inside the second BWP;determining that the QCL relationship between the first signal and the CSI-RS is the second type, if the first signal and / or the CSI-RS are on different carriers and / or the first signal is outside the second BWP.9.The method of claim 1, further comprising:determining that the UE is in an out-of-sync state and / or transmitting a fourth signal to request to activate a transmission of a third signal for synchronization of the first signal, if a first condition is satisfied.10.The method of claim 9, wherein the first condition includes at least one of:a reference signal received strength of the second signal being below a first threshold value for determining that the UE is in an in-sync state or an out-of-sync state,the reference signal received strength of the second signal being above a second threshold value for determining to exit monitoring of the first signal,a reference signal received quality of the second signal being below a third threshold value for determining that the UE is in the in-sync state or the out-of-sync state,the reference signal received quality of the second signal being above a fourth threshold value for determining to exit the monitoring of the first signal,an absolute value of a difference between the reference signal received strength of the second signal and a fifth threshold value for enabling the monitoring of the first signal being greater than a sixth threshold value,an absolute value of a difference between the reference signal received quality of the second signal and a seventh threshold value for enabling the monitoring of the first signal being greater than an eighth threshold value,N consecutive out-of-sync indications being received,the first signal failing to be successfully decoded for X consecutive time units.11.The method of claim 9, wherein determining that the UE is in the out-of-sync state and / or transmitting the fourth signal if the first condition is satisfied comprises:determining that the UE is in the out-of-sync state and / or transmitting the fourth signal, if the first condition and a second condition are satisfied,wherein the second condition includes at least one of:Y first signals failing to be successfully decoded before a first timer expires,an average value of a reference signal received strength of the second signal being below a ninth threshold value for determining that the UE is in the in-sync state or the out-of-sync state, before the first timer expires,the average value of the reference signal received strength of the second signal being above a tenth threshold value for enabling monitoring of the first signal, before the first timer expires,an average value of a reference signal received quality of the second signal being below an eleventh threshold value for determining that the UE is in the in-sync state or the out-of-sync state, before the first timer expires,the average value of the reference signal received quality of the second signal being above a twelfth threshold value for enabling the monitoring of the first signal, before the first timer expires,an absolute value of a difference between the average value of the reference signal received strength of the second signal and the fifth threshold value for enabling the monitoring of the first signal being greater than a thirteenth threshold value, before the first timer expires,an absolute value of a difference between the average value of the reference signal received quality of the second signal and the seventh threshold value for enabling the monitoring of the first signal being greater than a fourteenth threshold value, before the first timer expires.12.The method of claim 1, wherein the second configuration information further comprises a number of bits of the first signal transmitted in each orthogonal frequency division multiplexing (OFDM) symbol, andwherein the method further comprises determining a resource related to a monitoring occasion for the first signal based on the SCS of the first signal and the second configuration information.13.A method performed by a base station in a wireless communication system, the method comprising:transmitting first configuration information related to a first bandwidth part (BWP) or second configuration information related to a synchronization signal / physical broadcast channel (SS / PBCH) block, wherein the first configuration information includes information related to a frequency domain location of the first BWP and the second configuration information includes information related to a frequency domain location of the SS / PBCH block; andtransmitting third configuration information related to at least one of a first signal for waking up a user equipment (UE) or a second signal for synchronization of the first signal, wherein the third configuration information includes information related to at least one of a frequency domain location of the first signal or a frequency domain location of the second signal,wherein the first configuration information or the second configuration information, and the third configuration information are used to determine a subcarrier spacing (SCS) of at least one of the first signal or an SCS of the second signal.14.A user equipment (UE) in a wireless communication system, the UE comprising:a transceiver; anda processor coupled with the transceiver and configured to:receive first configuration information related to a first bandwidth part (BWP) or second configuration information related to a synchronization signal / physical broadcast channel (SS / PBCH) block, wherein the first configuration information includes information related to a frequency domain location of the first BWP and the second configuration information includes information related to a frequency domain location of the SS / PBCH block,receive third configuration information related to at least one of a first signal for waking up the UE or a second signal for synchronization of the first signal, wherein the third configuration information includes information related to at least one of a frequency domain location of the first signal or a frequency domain location of the second signal, anddetermine, based on the first configuration information or the second configuration information and based on the third configuration information, at least one of a subcarrier spacing (SCS) of the first signal or an SCS of the second signal.15.A base station in a wireless communication system, the base station comprising:a transceiver; anda processor coupled with the transceiver and configured to:transmit first configuration information related to a first bandwidth part (BWP) or second configuration information related to a synchronization signal / physical broadcast channel (SS / PBCH) block, wherein the first configuration information includes information related to a frequency domain location of the first BWP and the second configuration information includes information related to a frequency domain location of the SS / PBCH block, andtransmit third configuration information related to at least one of a first signal for waking up a user equipment (UE) or a second signal for synchronization of the first signal, wherein the third configuration information includes information related to at least one of a frequency domain location of the first signal or a frequency domain location of the second signal,wherein the first configuration information or the second configuration information, and the third configuration information are used to determine a subcarrier spacing (SCS) of at least one of the first signal or an SCS of the second signal.

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