Communication method, user equipment and base station

Abstract

Embodiments of the present disclosure provide a communication method, a user equipment and a base station, the method comprises: determining a set of overlaid OFDM sequences, the set of overlaid OFDM sequences being determined based on a first cyclic shift step, the first cyclic shift step being determined based on a first number, the first number being a number of overlaid OFDM sequences corresponding to each OOK ON chip, the set of overlaid OFDM sequences comprising the first number of overlaid OFDM sequences; and determining information bits of a wake-up signal based on the set of overlaid OFDM sequences. The embodiments of the present disclosure can ensure correlation of the overlaid OFDM sequences, to facilitate the determination of the information bits of the wake-up signal.

Description

COMMUNICATION METHOD, USER EQUIPMENT AND BASE STATION

[0001] The present disclosure relates to the technical field of wireless communications, and in particular, to a communication method, a user equipment (UE) and a base station.

[0002] 5th generation (5G) mobile communication technologies define broad frequency bands such that high transmission rates and new services are possible, and can be implemented not only in "Sub 6GHz" bands such as 3.5 GHz, but also in "Above 6 GHz" bands referred to as mmWave including 28 GHz and 39 GHz. In addition, it has been considered to implement 6th generation (6G) mobile communication technologies (referred to as Beyond 5G systems) in terahertz bands (for example, 95 GHz to 3 THz bands) in order to accomplish transmission rates fifty times faster than 5G mobile communication technologies and ultra-low latencies one-tenth of 5G mobile communication technologies.

[0003] At the beginning of the development of 5G mobile communication technologies, in order to support services and to satisfy performance requirements in connection with enhanced mobile broadband (eMBB), ultra reliable low latency communications (URLLC), and massive machine-type communications (mMTC), there has been ongoing standardization regarding beamforming and massive multi input multi output (MIMO) for mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, supporting numerologies (for example, operating multiple subcarrier spacings) for efficiently utilizing mmWave resources and dynamic operation of slot formats, initial access technologies for supporting multi-beam transmission and broadbands, definition and operation of bandwidth part (BWP), new channel coding methods such as a low density parity check (LDPC) code for large amount of data transmission and a polar code for highly reliable transmission of control information, L2 pre-processing, and network slicing for providing a dedicated network specialized to a specific service.

[0004] Currently, there are ongoing discussions regarding improvement and performance enhancement of initial 5G mobile communication technologies in view of services to be supported by 5G mobile communication technologies, and there has been physical layer standardization regarding technologies such as vehicle-to-everything (V2X) for aiding driving determination by autonomous vehicles based on information regarding positions and states of vehicles transmitted by the vehicles and for enhancing user convenience, new radio unlicensed (NR-U) aimed at system operations conforming to various regulation-related requirements in unlicensed bands, NR UE power saving, non-terrestrial network (NTN) which is UE-satellite direct communication for providing coverage in an area in which communication with terrestrial networks is unavailable, and positioning.

[0005] Moreover, there has been ongoing standardization in air interface architecture / protocol regarding technologies such as industrial internet of things (IIoT) for supporting new services through interworking and convergence with other industries, integrated access and backhaul (IAB) for providing a node for network service area expansion by supporting a wireless backhaul link and an access link in an integrated manner, mobility enhancement including conditional handover and dual active protocol stack (DAPS) handover, and two-step random access for simplifying random access procedures (2-step RACH for NR). There also has been ongoing standardization in system architecture / service regarding a 5G baseline architecture (for example, service based architecture or service based interface) for combining Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) for receiving services based on UE positions.

[0006] As 5G mobile communication systems are commercialized, connected devices that have been exponentially increasing will be connected to communication networks, and it is accordingly expected that enhanced functions and performances of 5G mobile communication systems and integrated operations of connected devices will be necessary. To this end, new research is scheduled in connection with eXtended Reality (XR) for efficiently supporting Augmented Reality (AR), Virtual Reality (VR), Mixed Reality (MR) and the like, 5G performance improvement and complexity reduction by utilizing Artificial Intelligence (AI) and Machine Learning (ML), AI service support, metaverse service support, and drone communication.

[0007] Furthermore, such development of 5G mobile communication systems will serve as a basis for developing not only new waveforms for providing coverage in terahertz bands of 6G mobile communication technologies, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), array antennas and large-scale antennas, metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional space multiplexing technology using Orbital Angular Momentum (OAM), and Reconfigurable Intelligent Surface (RIS), but also full-duplex technology for increasing frequency efficiency of 6G mobile communication technologies and improving system networks, AI-based communication technology for implementing system optimization by utilizing satellites and AI from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technology for implementing services at levels of complexity exceeding the limit of UE operation capability by utilizing ultra-high-performance communication and computing resources.

[0008] The present disclosure provides a communication method, a user equipment and a base station to realize improvements to the LPWUS configuration and / or monitoring process.

[0009] According to an aspect of embodiments of the present disclosure, there is provided a method performed by a user equipment (UE) in a communication system, the method comprises:

[0010] determining a set of overlaid orthogonal frequency division multiplexing (OFDM) sequences, the set of overlaid OFDM sequences being determined based on a first cyclic shift step, the first cyclic shift step being determined based on a first number, the first number being a number of overlaid OFDM sequences corresponding to each on-off keying (OOK) ON chip, the set of overlaid OFDM sequences comprising the first number of overlaid OFDM sequences; and

[0011] determining information bits of a wake-up signal based on the set of overlaid OFDM sequences.

[0012] In an optional implementation, the first number has a first association relationship with a second number, the second number being a number of OOK chips comprised in an OFDM symbol.

[0013] In an optional implementation, the method further comprises:

[0014] receiving first configuration information, the first configuration information comprising the second number,

[0015] wherein the first number is determined based on the second number and the first association relationship.

[0016] In an optional implementation, the set of overlaid OFDM sequences being determined based on a first cyclic shift step, comprises:

[0017] determining value(s) for cyclic shift based on the first cyclic shift step and the first number; and

[0018] determining the set of overlaid OFDM sequences based on the value(s) for cyclic shift and root sequences.

[0019] In an optional implementation, the method further comprises:

[0020] receiving second configuration information, the second configuration information comprising a set of cyclic shift steps;

[0021] the first cyclic shift step being determined based on a first number, comprises:

[0022] determining a second cyclic shift step based on the first number; and

[0023] determining the first cyclic shift step based on the second cyclic shift step and the set of cyclic shift steps.

[0024] In an optional implementation, the first cyclic shift step is the maximum of values in the set of cyclic shift steps that are smaller than the second cyclic shift step.

[0025] In an optional implementation, the first number is inversely proportional to the second number.

[0026] In an optional implementation, the second number has a second association relationship with the first cyclic shift step;

[0027] each kind of the second number is associated with one first cyclic shift step; or

[0028] each kind of the second number is associated with multiple first cyclic shift steps, the method further comprises:

[0029] receiving third configuration information, the third configuration information comprising information indicative of one of the multiple first cyclic shift steps.

[0030] In an optional implementation, the method further comprises:

[0031] receiving fourth configuration information, the fourth configuration information comprising a logical root sequence index,

[0032] wherein the root sequences are determined in a first set of root sequences based on the logical root sequence index, the first set of root sequences is a predefined or preconfigured set of root sequences, or, the first set of root sequences is one determined from a plurality of sets of root sequences based on at least one of the second number, a first length of the overlaid OFDM sequences, and a largest prime number smaller than the first length, which are associated by the UE.

[0033] In an optional implementation, the first length is determined based on a bandwidth and the second number.

[0034] In an optional implementation, the first number of overlaid OFDM sequences are arranged in increasing order in correspondence with the information bits or subgroup indexes, respectively, based on increasing order of the value(s) for cyclic shift; and / or

[0035] the first number of overlaid OFDM sequences are arranged in increasing order in correspondence with codeword values, respectively, based on increasing order of the value(s) for cyclic shift.

[0036] In an optional implementation, the first configuration information and / or the fourth configuration information is further used to determine the set of overlaid OFDM sequences which corresponds to a first synchronization signal, the first synchronization signal being a signal used for synchronization of the wake-up signal.

[0037] In an optional implementation, a third number of OOK ON chips corresponding to the wake-up signal is determined based on at least one of the first number, a second length (number) of the information bits of the wake-up signal, or a coding rate.

[0038] In an optional implementation, the method further comprises:

[0039] monitoring the overlaid OFDM sequence corresponding to the third number of OOK ON chips which are consecutive, and stopping monitoring the overlaid OFDM sequence corresponding to OOK ON chips after the third number of OOK ON chips; or

[0040] monitoring the overlaid OFDM sequence corresponding to the third number of OOK ON chips which are transmitted repeatedly; or

[0041] monitoring the overlaid OFDM sequence until the complete information bits of the wake-up signal are monitored.

[0042] In an optional implementation, the information bits associated with the overlaid OFDM sequence corresponding to the third number of OOK ON chips are spliced into first information bits from left to right in order of reception;

[0043] if a length (number) of the first information bits is greater than a second length, information bits in the first information bits that are greater than the second length are discarded, or, the information bits in the first information bits that are greater than the second length is the information bits of the wake-up signal from left to right.

[0044] In an optional implementation, a coded code block length of a time-domain OOK binary sequence corresponding to the wake-up signal is determined based on at least one of the second number, a second length (number) of the information bits of the wake-up signal, or a coding rate.

[0045] In an optional implementation, each kind of the second number is associated with a coding rate; or

[0046] each kind of the second number is associated with a plurality of coding rates, the method further comprises:

[0047] receiving fifth configuration information, the fifth configuration information comprising information indicative of one of the plurality of coding rates.

[0048] In an optional implementation, the second number is inversely proportional to the code block length; and / or

[0049] the second length is directly proportional to the code block length; and / or

[0050] the coding rate is inversely proportional to the code block length.

[0051] In an optional implementation, coded base sequences of a time-domain OOK binary sequence corresponding to the wake-up signal and / or the length of the base sequences is related to the second number.

[0052] In an optional implementation, the length of the base sequences is inversely proportional to the second number.

[0053] In an optional implementation, quasi co-located (QCL) resources of the wake-up signal are determined by at least one of:

[0054] a cell-specific physical downlink control channel (PDCCH) or cell-specific control resource set (CORESET) configured in an active downlink bandwidth part (BWP);

[0055] a PDCCH or CORESET associated with a common search space (CSS) with the smallest index in a CSS set configured in the active downlink BWP;

[0056] a CORESET with the smallest index which is associated with a CSS set configured in the active downlink BWP;

[0057] a cell-specific PDCCH or cell-specific CORESET which is cell-configured with the smallest index;

[0058] a PDCCH or CORESET associated with a CSS with the smallest index in a cell-configured CSS set;

[0059] a CORESET with the smallest index which is associated with a cell-configured CSS set;

[0060] a UE-specific PDCCH or UE-specific CORESET with the smallest index which is configured in the active downlink BWP;

[0061] a PDCCH or CORESET associated with a UE-specific search space (USS) with the smallest index in a USS set configured in the active downlink BWP;

[0062] a CORESET with the smallest index which is associated with a USS set configured in the active downlink BWP;

[0063] a UE-specific PDCCH or UE-specific CORESET which is cell-configured with the smallest index;

[0064] a PDCCH or CORESET associated with a USS with the smallest index in a cell-configured USS set; or

[0065] a CORESET with the smallest index which is associated with a cell-configured USS set.

[0066] In an optional implementation, the PDCCH or the CORESET comprises indexes of synchronization signal block (SSB) and / or channel state information reference signal (CSI-RS) resources indicated in a configured transmission configuration indicator (TCI) state.

[0067] In an optional implementation, if the UE receives a wake-up indication that the UE wakes up, the UE's behaviors comprise at least one of:

[0068] restarting a BWP inactivity timer;

[0069] temporarily suspending the running of the BWP inactivity timer, and restarting the BWP inactivity timer if the PDCCH is monitored;

[0070] temporarily suspending the running of the BWP inactivity timer, and resuming the running of the BWP inactivity timer if the PDCCH is not monitored; or

[0071] temporarily suspending the running of the BWP inactivity timer, and resuming the running of the BWP inactivity timer upon completion of receiving a physical downlink shared channel (PDSCH) if the PDCCH is monitored and the PDCCH scheduled the PDSCH.

[0072] According to another aspect of embodiments of the present disclosure, there is provided a method performed by a base station in a communication system, the method comprises:

[0073] generating a set of overlaid orthogonal frequency division multiplexing (OFDM) sequences, the set of overlaid OFDM sequences being generated based on a first cyclic shift step, the first cyclic shift step being determined based on a first number, the first number being a number of overlaid OFDM sequences corresponding to each on-off keying (OOK) ON chip, the set of overlaid OFDM sequences comprising the first number of overlaid OFDM sequences; and

[0074] transmitting information bits of a wake-up signal based on the set of overlaid OFDM sequences.

[0075] According to yet another aspect of embodiments of the present disclosure, there is provided a user equipment (UE) comprising:

[0076] a transceiver; and

[0077] a processor coupled to the transceiver and configured to perform the method performed by the UE in the communication system according to the embodiments of the present disclosure.

[0078] According to still another aspect of embodiments of the present disclosure, there is provided a base station comprising:

[0079] a transceiver; and

[0080] a processor coupled to the transceiver and configured to perform the method performed by the base station in the communication system according to the embodiments of the present disclosure.

[0081] According to a further aspect of embodiments of the present disclosure, there is provided a computer-readable storage medium having stored thereon a computer program, that when executed by a processor, implements the method performed by the UE or the base station in the communication system according to the embodiments of the present disclosure.

[0082] According to a further aspect of embodiments of the present disclosure, there is provided a computer program product comprising a computer program, that when executed by a processor, implements the method performed by the UE or the base station in the communication system according to the embodiments of the present disclosure.

[0083] Embodiments of the present disclosure provide a communication method, a user equipment (UE) and a base station, the UE determines a set of overlaid OFDM sequences, the set of overlaid OFDM sequences being determined based on a first cyclic shift step, the first cyclic shift step being determined based on a first number, the first number being a number of overlaid OFDM sequences corresponding to each OOK ON chip, the set of overlaid OFDM sequences comprising the first number of overlaid OFDM sequences, and determines information bits of a wake-up signal based on the set of overlaid OFDM sequences. The embodiments of the present disclosure can ensure correlation of the overlaid OFDM sequences, to facilitate the determination of the information bits of the wake-up signal.

[0084] According to an embodiment of the present disclosure, power consumption of a UE can be improved and battery life can be enhanced.

[0085] In order to more clearly explain the technical solutions in the embodiments of the present disclosure, the accompanying drawings to be used in the description of the embodiments of the present disclosure will be briefly described below.

[0086] FIG. 1 is a schematic diagram of an overall structure of a wireless network according to an embodiment of the present disclosure;

[0087] FIG. 2A is a schematic diagram of a transmission path according to an embodiment of the present disclosure;

[0088] FIG. 2B is a schematic diagram of a reception path according to an embodiment of the present disclosure;

[0089] FIG. 3A is a schematic diagram of a structure of a UE according to an embodiment of the present disclosure;

[0090] FIG. 3B is a schematic diagram of a structure of a base station according to an embodiment of the present disclosure;

[0091] FIG. 4 is a schematic flowchart of a method performed by a UE according to an embodiment of the present disclosure;

[0092] FIG. 5 is a schematic flowchart of a method performed by a base station according to an embodiment of the present disclosure; and

[0093] FIG. 6 is a schematic diagram of a structure of an electronic device according to an embodiment of the present disclosure.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] Depending on a type of the network, other well-known terms such as "base station" or "access point" can 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" can 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).

[0104] 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 can communicate with each other and with UEs 111-116 using 5G, Long Term Evolution (LTE), LTE-A, WiMAX or other advanced wireless communication technologies.

[0105] 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.

[0106] 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.

[0107] Although FIG. 1 illustrates an example of the wireless network 100, various changes can be made to FIG. 1. The wireless network 100 can include any number of gNBs and any number of UEs in any suitable arrangement, for example. Furthermore, gNB 101 can directly communicate with any number of UEs and provide wireless broadband access to the network 130 for those UEs. Similarly, each gNB 102-103 can 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 can provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0108] FIGs. 2A and 2B illustrate example wireless transmission and reception paths according to the present disclosure. In the following description, the transmission path 200 can be described as being implemented in a gNB, such as gNB 102, and the reception path 250 can be described as being implemented in a UE, such as UE 116. However, it should be understood that the reception path 250 can be implemented in a gNB and the transmission path 200 can 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.

[0109] 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.

[0110] 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 can also be filtered at a baseband before switching to the RF frequency.

[0111] 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.

[0112] 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.

[0113] Each of the components in FIGs. 2A and 2B can 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.

[0114] 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 can 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.).

[0115] 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 can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. Furthermore, FIGs. 2A and 2B are intended to illustrate examples of types of transmission and reception paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communication in a wireless network.

[0116] 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 can 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.

[0117] 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.

[0118] 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).

[0119] 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.

[0120] The controller / processor 307 can 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 can 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.

[0121] 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 can 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.

[0122] The controller / processor 307 is also coupled to the input device(s) 309 and the display 310. An operator of UE 116 can 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 can include a random access memory (RAM), while another part of the memory 311 can include a flash memory or other read-only memory (ROM).

[0123] Although FIG. 3A illustrates an example of UE 116, various changes can be made to FIG. 3A. For example, various components in FIG. 3A can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. As a specific example, the controller / processor 307 can 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 can be configured to operate as other types of mobile or fixed devices.

[0124] 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 can 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 can include the same or similar structures as gNB 102.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] The controller / processor 378 can include one or more processors or other processing devices that control the overall operation of gNB 102. For example, the controller / processor 378 can 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 can also support additional functions, such as higher-level wireless communication functions. For example, the controller / processor 378 can 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.

[0129] 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 can 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 can move data into or out of the memory 380 as required by an execution process.

[0130] 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 can 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 can 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 can 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.

[0131] The memory 380 is coupled to the controller / processor 378. A part of the memory 380 can include an RAM, while another part of the memory 380 can 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.

[0132] 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.

[0133] Although FIG. 3B illustrates an example of gNB 102, various changes may be made to FIG. 3B. For example, gNB 102 can include any number of each component shown in FIG. 3A. As a specific example, the access point can include many backhaul or network interfaces 382, and the controller / processor 378 can 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 can include multiple instances of each (such as one for each RF transceiver).

[0134] The exemplary embodiments of the present disclosure are further described below in conjunction with the accompanying drawings.

[0135] 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 can be made without departing from the scope of the present disclosure. In order to make the objects, technical solutions, and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in further detail below in conjunction with the accompanying drawings.

[0136] The transmission links of a wireless communication system mainly includes a downlink communication link from a 5G New Radio (NR) gNB (base station) to a UE, an uplink communication link from a UE to a network, and a sidelink communication link from a UE to a UE.

[0137] In the wireless communication system such as the current wireless communication system, in order to reduce energy consumption on the terminal side, a discontinuous reception (DRX) mechanism is introduced, where in a radio resource control (RRC) inactive state (INACTIVE) and / or an idle state (IDLE), the UE monitors a paging occasion (PO) in each DRX cycle, and is in a sleep state and does not need to monitor a physical downlink control channel (PDCCH) for most of time in each DRX cycle except for the paging occasion. When the UE monitors the PDCCH scrambled with a paging-Radio Network Tempory Identity (P-RNTI) in the corresponding PO, the UE continues to read the paged terminal identity in the paging message. If the read terminal identity is the same as its own identity, the UE further reads the paging message, otherwise, it discards the paging message. In the above process, in order to further reduce the 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 system information is configured with the PEI, the UE monitors the 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 shall wake up at the associated PO to monitor the PO; otherwise, the UE does not need to wake up to monitor the PO. In an RRC connected state, each DRX cycle contains an Active Time and a Non-active Time. In the Active Time, the UE needs to monitor the PDCCH, while in the Non-active Time, the UE only needs to monitor the PDCCH carrying downlink control information (DCI) 2-6, but does not need to monitor other PDCCHs. The UE starts a drx-onDurationTimer (DRX ON duration timer) at the start position of each DRX cycle to start monitoring the PDCCHs. The UE obtains a power saving-radio network temporary identifier (PS-RNTI) by an RRC configuration. The UE monitors the PDCCH carrying DCI 2-6 during the DRX inactivity time, and if the UE detects that the PS-RNTI carried by the PDCCH is the same as that configured by the RRC, the UE determines that the PDCCH is the DCI 2-6, and the UE further reads the DCI message and determines whether to start the drx-onDurationTimer.

[0138] In an embodiment of the present disclosure, for some scenarios (e.g., Internet of Things devices and / or wearable devices) that have more stringent requirements for low energy consumption of the UE, in order to further extend the battery life of the UE, a new low power wake up signal (LPWUS) may be used in the wireless communication system to wake up the UE. Based on this, the present disclosure proposes a communication method, a user equipment and a base station to realize improvements to the LPWUS configuration and / or monitoring process.

[0139] Specifically, an embodiment of the present disclosure provides a method of low power wake-up signal configuration and / or monitoring, including, for example, but not limited to, a method of generating a set of overlaid OFDM sequences for wake-up signal corresponding to each OOK ON chip, a method of determining a mapping relationship between the overlaid OFDM sequences for wake-up signal and chips of a wake-up signal time-domain OOK binary sequence, a coding method of the wake-up signal time-domain OOK binary sequence, and a method of the wake-up signal-related configuration and monitoring, and the like.

[0140] The technical solutions of the embodiments of the present disclosure and the technical effects produced by the technical solutions of the present disclosure are described below by describing several exemplary implementations. It should be noted that the following embodiments may be referred to, learned from, or combined with each other, and the same terms, similar features, and similar implementation steps in different embodiments will not be described repeatedly.

[0141] In the embodiment of the present disclosure, an exemplary introduction is made using the wake-up signal, wherein the wake-up signal includes, but is not limited to, an LPWUS signal, and the introduced methods may also be used for configuration and transmission of other signals.

[0142] In the embodiment of the present disclosure, the receiver of the UE includes two modules, i.e., a Main Radio (MR) module for receiving conventional signals / channels transmitted by the base station, and a Lower Power Wake Up Receiver (LPWUR) module for receiving the wake-up signal transmitted by the base station and a first synchronization signal for synchronization of the wake-up signal. The use of dedicated modules to receive the wake-up signal is due to the fact that the LPWUS is further modulated wave based on Amplitude Shift Keying (ASK) on the basis of Orthogonal Frequency Division Multiplexing (OFDM) waveforms using an existing NR system. The LPWUR can monitor the wake-up signal with very low power, and once the UE monitors the wake-up signal, the LPWUR can trigger the MR to transition from the dormant time to the Active Time and monitor the PEI and / or PO. Optionally, the On-Off Keying (OOK) modulation is a special case of the Amplitude Shift Keying (ASK) modulation. The LPWUR includes two different types of receivers: an OOK-based receiver and an OFDM-based receiver, where the OOK-based receiver performs the synchronization and Radio Resource Management (RRM) measurements based on a Low-Power Synchronization Signal (LP-SS), and the OFDM-based receiver performs the synchronization and RRM measurements based on a Synchronization Signal Block (SSB). The first synchronization signal comprises an LP-SS and / or an SSB and / or a Secondary Synchronization Signal (SSS), wherein the OFDM architecture-based receiver may perform the RRM measurements and synchronization for the wake-up signal by the SSB and / or the SSS, and the OOK architecture-based receiver may perform the RRM measurements and synchronization for the wake-up signal by the LP-SS.

[0143] In the embodiment of the present disclosure, feasible implementations are provided for the method of generating a set of overlaid OFDM sequences for wake-up signal corresponding to each OOK ON chip, as well as an association relationship between information bits of the wake-up signal and the overlaid OFDM sequences.

[0144] In a feasible implementation, an embodiment of the present disclosure provides a method performed by a UE in a communication system. As shown in FIG. 4, the method comprises the following steps.

[0145] Step S401: determining a set of overlaid OFDM sequences, the set of overlaid OFDM sequences being determined based on a first cyclic shift step, the first cyclic shift step being determined based on a first number, the first number being a number of overlaid OFDM sequences corresponding to each OOK ON chip, the set of overlaid OFDM sequences comprising the first number of overlaid OFDM sequences.

[0146] In the embodiment of the present disclosure, the overlaid OFDM sequences may also be referred to as overlaid OFDM candidate sequences, or simply as OFDM candidate sequences, candidate sequences, or sequences, and the like. Correspondingly, the set of overlaid OFDM sequences may also be referred to as the set of overlaid OFDM sequence candidates or the set of overlaid OFDM candidate sequences, or simply as the set of OFDM candidate sequences, the set of candidate sequences, or the set of sequences, etc., and the embodiment of the present disclosure is not limited herein.

[0147] In the embodiment of the present disclosure, a cyclic shift step C (the first cyclic shift step) is determined based on the number N (first number) of overlaid OFDM candidate sequences. For example, the UE determines a value of C based on C=floor (length of overlaid OFDM sequences (which may be referred to hereinafter as length of sequences for ease of description), or a largest prime number that is smaller than the length of overlaid OFDM sequences (which may be referred to hereinafter as a prime number for ease of description) / N), or it is predefined that the cyclic shift step C is equal to floor (length of sequences or the prime number / N). Wherein, the floor means rounding down, and floor in the following denotes the same meaning and will not be repeated. Based on C, the set of overlaid OFDM sequences is determined. Here, the set of overlaid OFDM sequences for wake-up signal comprises a full set of overlaid OFDM candidate sequences associated with each OOK ON chip, such as including N overlaid OFDM sequences.

[0148] Step S402: determining information bits of a wake-up signal based on the set of overlaid OFDM sequences.

[0149] In the embodiment of the present disclosure, the overlaid OFDM sequences are used to carry the information bits of the wake-up signal, and after the set of overlaid OFDM sequences is determined, the information bits of the wake-up signal can be determined.

[0150] The method performed by the UE in the communication system according to the embodiment of the present disclosure may ensure correlation of the overlaid OFDM sequences, to facilitate the determination of the information bits of the wake-up signal.

[0151] In the embodiment of the present disclosure, the set of overlaid OFDM sequences being determined based on a first cyclic shift step, may specifically comprise: determining the value(s) for cyclic shift based on the first cyclic shift step and the first number; and determining the set of overlaid OFDM sequences based on the value(s) for cyclic shift and root sequence(s). For example, based on the cyclic shift step C (first cyclic shift step) and the number N (first number), the value(s) for cyclic shift are determined to be C×v, v = 0, 1, ..., N-1. Such operation may generate a set of overlaid OFDM sequence candidates from a root sequence with a better correlation property of the sequences.

[0152] In the embodiment of the present disclosure, the first number may be predefined or preconfigured. Alternatively, it is determined based on the second number. Optionally, the first number may have a first association relationship with a second number, the second number being a number of OOK chips comprised in one OFDM symbol. For example, if Manchester coding is applied, 10 or 01 corresponds to an OOK chip, and one overlaid OFDM sequence determined from the set of overlaid OFDM sequences is transmitted on a time unit corresponding to a high level (the position of 1, ON chip) in the OOK chip.

[0153] In a feasible implementation, the UE can receive first configuration information, the first configuration information comprising the second number. For example, the UE obtains a number (the second number) of OOK chips M included in an OFDM symbol, through an RRC or SIB1 (System Information Block 1, first system information block) configuration, where the value of M may be one of, but is not limited to, 1, 2, 4. Optionally, the first number is determined based on the second number and the first association relationship. For example, the UE obtains the M value through the RRC or SIB1 configuration, and determines the cyclic shift step C (first cyclic shift step) based on the number N (first number) of predefined or preconfigured overlaid OFDM candidate sequences associated with the M value. For example, the UE determines the value of C based on C=floor (length of sequences or the prime number / N), or it is predefined that the cyclic shift step C is equal to floor (length of sequences or the prime number / N). Based on C, the value(s) for cyclic shift are determined as C×v, v = 0, 1, ..., N-1. Such operation can generate a set of overlaid OFDM sequence candidates from a root sequence with a better correlation property of the sequences. In addition, the cyclic shift step and the value(s) for cyclic shift can be determined by configuring only the M value, reducing signaling overhead.

[0154] An embodiment of the present disclosure provides a feasible implementation for the first association relationship between the first number and the second number.

[0155] Optionally, the first number is inversely proportional to the second number. For example, the number N (first number) of predefined or preconfigured overlaid OFDM candidate sequences associated based on the M value (the second number) may comprise: when M=1, N is 16; when M=2, N is 8; or when M=4, N is 4. Such operation is applicable to the case where different values of M are associated with different N.

[0156] Optionally, different second numbers may share the same set of overlaid OFDM candidate sequences.

[0157] For example, the number N (first number) of predefined or preconfigured overlaid OFDM candidate sequences associated based on the M value (the second number) may comprise: when M=1 and / or M=2, N is 6; or when M=4, N is 4. Such operation reduces the number of overlaid OFDM candidate sequences when M=1 and / or M=2, and it can be realized that M=1 and M=2 share the same set of overlaid OFDM candidate sequences, reducing signaling overhead.

[0158] For example, the number N (first number) of predefined or preconfigured overlaid OFDM candidate sequences associated based on the M value (the second number) may comprise: when M=1 and / or M=2 and / or M=4, N is 4. Such operation can further reduce the number of overlaid OFDM candidate sequences when M=1 and / or M=2, and only one set of overlaid OFDM candidate sequences needs to be configured, reducing signaling overhead.

[0159] In a feasible implementation, the UE may receive second configuration information, the second configuration information comprising a set of cyclic shift steps, the first cyclic shift step being determined based on a first number, comprises: determining a second cyclic shift step based on the first number; and determining the first cyclic shift step based on the second cyclic shift step and the set of cyclic shift steps. Optionally, the first cyclic shift step is the maximum of values in the set of cyclic shift steps that are smaller than the second cyclic shift step. For example, the UE obtains the M value and a set of cyclic shift steps by the RRC or SIB1 configuration, determines the cyclic shift step C (second cyclic shift step) based on the number N (first number) of predefined or preconfigured overlaid OFDM candidate sequences associated with the M value. For example, the UE determines the value of C based on C=floor (length of sequences or the prime number / N). The UE determines, by the determined value of C and the configured set of cyclic shift steps, the cyclic shift step C1 (first cyclic shift step) to be the maximum of values in the set of cyclic shift steps that are smaller than the value of C, or may also be described as the closest value to the value of C that is smaller than the value of C, or the minimum of values in which differences between the value of C and the values in the set of cyclic shift steps are greater than 0, or the maximum of values in the set of cyclic shift steps whose difference with the value of C is smaller than 0. Based on C1, the value(s) for cyclic shift are determined as C1×v, v = 0, 1, ..., N-1. Such operation may generate a set of overlaid OFDM sequence candidates from a root sequence with a better correlation property of the sequences, and the UE determines the cyclic shift step based on the configuration and implicitly, which can make the generated sequences satisfy the needs of the network while ensuring the correlation. Optionally, the set of cyclic shift steps may also be understood as a set of value(s) for cyclic shift.

[0160] In a feasible implementation, the first cyclic shift step may be preconfigured or predefined, e.g., by preconfiguring or predefining the cyclic shift step C (first cyclic shift step), where C is an integer greater than or equal to 0, e.g., C=8. If C=0, the cyclic shift value is 0. If C is not 0, the cyclic shift value is C×v, where v=0, 1, ..., floor (length of sequences or the prime number / C)-1. This approach may enable the UE to generate a set of overlaid OFDM candidate sequences associated with each OOK ON chip based on a root sequence by a cyclic shift value, which may reduce the implementation complexity of the UE, and furthermore, based on the length of sequences, a preconfigured or predefined cyclic shift step may enable the UE to generate a set of candidate sequences by a root sequence, with a better correlation of the candidate sequences.

[0161] In a feasible implementation, it may be defined that the second number may have a second association relationship with the first cyclic shift step.

[0162] Optionally, each kind of the second number is associated with one first cyclic shift step. For example, an association relationship between one M value (the second number) or the length of sequences (determined based on the M value) or the prime number and one cyclic shift step C (first cyclic shift step) is defined. For example, the M value or the length of sequences or the prime number is associated with one cyclic shift step C. The UE determines one associated cyclic shift step C based on the configured M value. Such operation may enable the sequences of different lengths to have different cyclic shift steps, preventing energy leakage of the frequency bias to sequence-associated peaks from having an impact on LP-WUR reception performance.

[0163] Or optionally, each kind of the second number is associated with multiple first cyclic shift steps. For example, an association relationship between one M value (the second number) or the length of sequences (determined based on the M value) or the prime number and the multiple cyclic shift steps C (first cyclic shift step) is defined. For example, one M value or the length of sequences or the prime number is associated with the multiple cyclic shift steps C. Then, the UE may receive third configuration information, the third configuration information comprising information indicative of one of the multiple first cyclic shift steps, and specifically, the indication information may comprise a cyclic shift step index. For example, by configuring the M value and the cyclic shift step index via RRC or SIB1, the UE determines one cyclic shift step C associated with the M value or the length of sequences or the prime number. Based on the determined C, the value(s) for cyclic shift are determined to be C×v, v = 0, 1, ..., floor (length of sequences or the prime number / C)-1. Such operation may enable the network to indicate different cyclic shift step indexes based on different scenarios, preventing energy leakage of the frequency bias to sequence-associated peaks from having an impact on LP-WUR reception performance.

[0164] In the embodiment of the present disclosure, the UE may receive fourth configuration information, the fourth configuration information comprising a logical root sequence index. For example, the UE configures the logical root sequence index via RRC or SIB1, and the value of the logical root sequence index is used to indicate an associated root sequence (index).

[0165] Wherein, the root sequences used to calculate the value(s) for cyclic shift are determined in a first set of root sequences based on the logical root sequence index.

[0166] Optionally, the first set of root sequences is a predefined or preconfigured set of root sequences, i.e., the UE may determine indexes of the root sequences based on the predefined or preconfigured set of root sequences. For example, the UE determines an associated root sequence index within a predefined set of root sequences based on the configured logical root sequence index. Such operation may reduce the implementation complexity of the UE.

[0167] Or optionally, the first set of root sequences is a set of root sequences determined from determined from a plurality of sets of root sequences based on at least one of the second number, a first length of the overlaid OFDM sequences, and a largest prime number smaller than the first length, which are associated by the UE, i.e., a set of root sequences is determined within the plurality of preconfigured sets of root sequences by the M value or the length of sequences or the prime number which are associated by the UE. For example, a root sequence index associated with a logical root sequence index within the set of root sequences associated with the length of overlaid OFDM sequences or the prime number is determined based on the first length (corresponding to the length of sequences above) or a largest prime number that is smaller than the first length (corresponding to the prime number above), as well as the logical root sequence index, wherein the set of root sequences is a set of root sequences predefined based on the associated length of sequences or the prime number. For example, a length of sequences or a prime number corresponds to a set of root sequences. Further, the set of overlaid OFDM sequences for wake-up signal may be determined based on the determined root sequence (index) and the determined value(s) for cyclic shift.

[0168] In the embodiment of the present disclosure, the above-described first length (length of sequences) is determined based on a bandwidth and the second number. That is, the length of sequences is associated with the M value. Wherein, the bandwidth is a number of frequency-domain units occupied by the wake-up signal in the frequency domain. For example, based on the configured M value, the length of overlaid OFDM sequences is determined to be L=12×11 / M physical resource blocks (PRBs).

[0169] A time domain unit (also referred to as a time unit) in an embodiment of the present disclosure may be: an OFDM symbol, a group of OFDM symbols (comprising a plurality of OFDM symbols), a slot, a group of slots (comprising a plurality of slots), a subframe, a group of subframes (comprising a plurality of subframes), a system frame, or a group of system frames (comprising a plurality of system frames), or it can also be an absolute time unit, such as 1 millisecond, 1 second, and the like. The time unit can also be a combination of multiple granularities, for example, N1 slots plus N2 OFDM symbols, and the like. It may also be a length of time for an on-off keying (OOK) code.

[0170] A frequency domain unit (also referred to as a frequency unit) in an embodiment of the present disclosure may be: a subcarrier, a group of subcarriers (comprising a plurality of subcarriers), a resource block (RB), which may also be referred to as a physical resource block (PRB), a group of resource blocks (comprising a plurality of RBs), a bandwidth part (BWP), a group of bandwidth parts (comprising a plurality of BWPs), a frequency band / carrier, or a frequency band group / carrier group; and it can also be an absolute frequency domain unit, such as 1 Hz, 1 kHz, and the like. The frequency domain unit may also be a combination of multiple granularities, such as M1 PRBs plus M2 subcarriers, and the like.

[0171] In the embodiment of the present disclosure, the first number of overlaid OFDM sequences are arranged in increasing order in correspondence with information bits or subgroup indexes, respectively, based on increasing order of the value(s) for cyclic shift, or it may be described that an association relationship between the overlaid OFDM sequences and the information bits may be determined in a way that candidate sequences determined in increasing order of the value(s) for cyclic shift are in one-to-one correspondence with increasing order of the information bits. For example, when M=1, an OOK ON chip supports up to 16 candidate sequences, each of which may carry 4 information bits, then in accordance with the incremental one-to-one correspondence, the sequences with a cyclic shift value of 0 are associated with 0000, the sequences with a cyclic shift value of C are associated with 0001, the sequences with a cyclic shift value of 2×C are associated with 0010, and so on. Such operation can establish the association relationship between the overlaid OFDM sequences and the carried information bits or group indexes, reducing the implementation complexity of the UE.

[0172] In the embodiment of the present disclosure, the first number of overlaid OFDM sequences are arranged in increasing order in correspondence with codeword values, respectively, based on increasing order of the value(s) for cyclic shift, or it may also be described that an association relationship between the overlaid OFDM sequences and values of the information bits or group indexes may be determined in a way that candidate sequences determined in increasing order of the value(s) for cyclic shift are in one-to-one correspondence with increasing order of the codeword values. For example, when M=1 and / or M=2, N is configured to be 6 or predefined to be ceil ( ), where Q is the number of bits associated with a wake-up signal, and 6 sequences determined in increasing order of the value(s) for cyclic shift may be determined in a one-to-one correspondence with values of the 6 codewords in increasing order, where the sequences with a cyclic shift value of 0 is associated with 0, the sequences with a cyclic shift value of C is associated with 1, the sequences with a cyclic shift value of 2×C is associated with 2, and so on. The UE determines a value of the indicated wake-up signal original information bit or group index by the overlaid OFDM sequences 1 and 2 corresponding to 2 OOK ON codewords. For example, the UE determines the value of the wake-up signal original information bit or group index as (value of the codeword associated with the sequence 1×N+value of the codeword associated with the sequence 2). Optionally, the 2 OOK ON codewords are two consecutive OOK ON codewords. For another example, N is configured to be 4 or predefined to be ceil ( ), where Q is the number of information bits associated with a wake-up signal, and 4 sequences determined in increasing order of the value(s) for cyclic shift may be determined in a one-to-one correspondence with values of the 4 codewords in increasing order, where the sequences with a cyclic shift value of 0 is associated with 0, the sequences with a cyclic shift value of C is associated with 1, the sequences with a cyclic shift value of 2×C is associated with 2, and so on. The UE determines a value of the indicated wake-up signal original information bit or group index by the overlaid OFDM sequences 1, 2, and 3 corresponding to 3 OOK ON codewords. For example, the UE determines the value of the wake-up signal original information bit or group index as (value of the codeword associated with the sequence 1 × 2 × N + value of the codeword associated with the sequence 2 × N + value of the codeword associated with the sequence 3). Such operation can reduce the number of candidate sequences.

[0173] In a feasible implementation, the first configuration information and / or the third configuration information comprises a response to a radio resource control (RRC) request initiated by the UE. That is, the RRC information may be an RRC set up message, and the UE obtains the M value and / or the logical root sequence index through a UE-specific RRC message. Such operation may configure different M values and / or logical root sequence indexes for different UEs, to reduce interference among users or among different user groups.

[0174] In a feasible implementation, the first configuration information and / or the fourth configuration information is further used to determine the set of overlaid OFDM sequences which corresponds to a first synchronization signal, the first synchronization signal being a signal used for synchronization of the wake-up signal. That is, the wake-up signal and the first synchronization signal may use the same M value and / or the logical root sequence index of the overlaid OFDM sequence, wherein the first synchronization signal comprises, but is not limited to, the LP-SS. If a cyclic shift step index is configured, the wake-up signal and the first synchronization signal may use the same configured cyclic shift step index to generate a set of overlaid OFDM sequence candidates. The UE may determine the M value and / or the logical root sequence index and / or the cyclic shift step index for the wake-up signal and the first synchronization signal by one configured M value and / or the logical root sequence index and / or the cyclic shift step index. Such operation may reduce RRC signaling overhead, and furthermore, such operation may reduce the complexity of performing sequence detection by the UE.

[0175] An embodiment of the present disclosure provides a feasible implementation for determining a mapping relationship between the wake-up signal overlaid OFDM sequences and chips of the wake-up signal time-domain OOK binary sequence.

[0176] Optionally, the maximum number N of overlaid OFDM candidate sequences to which OOK ON chips of a wake-up signal time-domain OOK binary sequence in a cell may correspond is determined based on the M value through a predefined relationship. For example, when M=1, N=16, then a candidate sequence may carry 4 wake-up signal information bits; when M=2, N=8, then a candidate sequence may carry 3 wake-up signal information bits; and when M=4, N=4, then a candidate sequence may carry 2 wake-up signal information bits.

[0177] When the overlaid OFDM candidate sequence carries the original information bits of the wake-up signal, it is assumed that the number of the original information bits is x, where x is an integer greater than 1, and optionally, x=5.

[0178] Optionally, x and Q above may denote the same meaning.

[0179] In a feasible implementation, the third number of OOK ON chips corresponding to the wake-up signal may be determined based on the first number (N) and the second length (x) of the information bits of the wake-up signal. For example, the original information bits of a complete wake-up signal may be carried by overlaid OFDM sequence(s) corresponding to F=ceil (x / log2(N)) consecutive OOK ON chips with ceil being taken as an upper bound. Such operation is intended to enable UEs with detection OFDM sequences to obtain indication information carried by the wake-up signal more quickly.

[0180] When an overlaid OFDM candidate sequence carries the codeword values, it can also be described that all information bits carried by a wake-up signal can be carried by the overlaid OFDM sequence corresponding to F=k consecutive OOK ON chips, where ceil is taken as an upper bound, and k is the value of k corresponding to the smallest of the candidate values that satisfy that N^k is greater than the value of the original information bits or group index carried by a time domain OOK binary sequence, where k is an integer greater than 0.

[0181] In another feasible implementation, a third number of OOK ON chips corresponding to the wake-up signal is determined based on at least one of the first number, a second length (number) of the information bits of the wake-up signal, or a coding rate. For example, when an overlaid OFDM candidate sequence carries the coded information bits of the wake-up signal, if the coding rate is determined to be 1 / y based on the RRC or SIB1 configuration, y is an integer greater than 1, and the number of the coded information bits is x×y. The coded information bits of a complete wake-up signal can be determined by an overlaid OFDM sequence corresponding to F = ceil ((x×y) / log2(N)) consecutive OOK ON chips, with ceil being taken as an upper bound. Such operation improves the reliability of transmitting the information bits of the wake-up signal using OFDM sequences.

[0182] In a feasible implementation, the UE may monitor the overlaid OFDM sequence corresponding to the third number of OOK ON chips which are consecutive, and stop monitoring the overlaid OFDM sequence corresponding to OOK ON chips after the third number of OOK ON chips. For example, when the overlaid OFDM candidate sequence carries the original information bits of the wake-up signal, the UE only monitors ceil (x / log2N) consecutive OOK ON chips starting from the time-domain OOK binary sequence, and the UE does not expect to monitor and / or detect the overlaid OFDM sequence corresponding to subsequent OOK ON chips. When the overlaid OFDM candidate sequence carries the coded information bits of the wake-up signal, the UE only monitors ceil ((x×y) / log2N) consecutive OOK ON chips starting from the time-domain OOK binary sequence, and the UE does not expect to monitor and / or detect the overlaid OFDM sequence corresponding to subsequent OOK ON chips. Such operation can reduce the energy consumption of the UE to monitor the wake-up signal.

[0183] Optionally, the information bits associated with the overlaid OFDM sequence corresponding to the third number of OOK ON chips are spliced into first information bits from left to right in order of reception. For example, the information bits associated with the overlaid OFDM sequence corresponding to the F OOK ON chips are spliced into wake-up signal information bits (first information bits) from left to right in order of reception.

[0184] In a feasible implementation, if the length (number) of the first information bits is greater than the second length (the length (number) of the information bits of the wake-up signal), information bits in the first information bits that are greater than the second length are discarded. For example, if the number Q of all information bits carried by a wake-up signal (corresponding to the second length) is smaller than the number of the information bits (first information bits) of the wake-up signal, the UE discards more bit values than Q in order from left to right.

[0185] In a feasible implementation, the UE may monitor the overlaid OFDM sequence corresponding to the third number of OOK ON chips which are transmitted repeatedly, e.g., assuming that the information bits associated with the overlaid OFDM sequence corresponding to the F OOK ON chips are spliced into wake-up signal information bits in order of reception from left to right, and if the number Q of all information bits carried by the wake-up signal is smaller than the number of the information bits of the wake-up signal, starting from the first OOK chip of the time-domain OOK binary sequence of the wake-up signal, F overlaid OFDM sequences corresponding to every consecutive F OOK ON chips are the same. For example, the overlaid OFDM sequence corresponding to first one of the first F OOK ON chips and the overlaid OFDM sequence corresponding to first one of the second F OOK ON chips are the same, and so on. Such operation can increase the coverage of the wake-up signal by repeatedly transmitting the F overlaid OFDM sequences.

[0186] In a feasible implementation, information bits in the first information bits that are greater than the second length are the information bits of the wake-up signal from left to right. For example, starting from the first OOK chip of the wake-up signal time-domain OOK binary sequence, all information bits of one wake-up signal are carried through F overlaid OFDM sequences corresponding to F consecutive OOK ON chips, and the information bits associated with the F overlaid OFDM sequences are spliced into information bits of one wake-up signal from left to right in order of reception, and if the number Q of all the information bits carried by one wake-up signal is smaller than the number of the information bits of one wake-up signal, the bit values that are more than Q is the bit values of all the information bits carried by one wake-up signal from left to right. For example, assuming that an overlaid OFDM sequence can carry 4 information bits when M=1 and N=16, if Q=5, and if all the information bits carried by one wake-up signal are 01101, 2 overlaid OFDM sequences corresponding to 2 consecutive OOK ON chips can carry 8 information bits, and the bit values that are more than Q is 011, i.e., bit information carried by first one of the 2 overlaid OFDM sequences is 0110 and bit information carried by second one of the 2 overlaid OFDM sequences is 1011. The bit information associated with all of the overlaid OFDM sequences corresponding to all of the OOK ON chips of one wake-up signal is spliced into a repetition of the information bits of one wake-up signal from left to right in order of reception, and every Q bits from left to right are the information bits of one wake-up signal. Such operation may avoid discarding some of the information bits carried by the overlaid OFDM sequences, allowing the UE to increase the coverage of the wake-up signal by merging the bit information repeatedly transmitted by the UE.

[0187] In a feasible implementation, the UE can monitor the overlaid OFDM sequence until the complete information bits of the wake-up signal are monitored. For example, the UE monitors an overlaid OFDM candidate sequence associated with the OOK ON chip of each OOK binary sequence, determines the information bits of the wake-up signal carried by the overlaid OFDM candidate sequence, until the complete information bits of the wake-up signal are detected or all the information bits carried by the one wake-up signal are detected, or until the end position of the OOK binary sequence, or, whichever is earlier. The complete information bits of the wake-up signal or all the information bits carried by the wake-up signal may comprise original information bits carried by one wake-up signal, or channel-coded bits carried by one wake-up signal, or codewords carried by one wake-up signal.

[0188] The embodiments of the present disclosure provide a feasible implementation for coding wake-up signal time-domain OOK binary sequences.

[0189] In a feasible implementation, a coded block length of a time-domain OOK binary sequence corresponding to the wake-up signal is determined based on at least one of the second number, a second length (number) of the information bits of the wake-up signal, or a coding rate. The coded block length of the time-domain OOK binary sequence is related to the M value and / or the number of original information bits of the wake-up signal and / or a coding rate.

[0190] Optionally, each kind of the second number is associated with a coding rate. For example, the relationship between the code block length and the M value is predefined, the M value may be associated with one or more coding rates, and when the M value is predefined to be associated with a coding rate, the UE may determine the code block length as well as the coding bits based on the M value and the number of original information bits of the wake-up signal, and such operation is more applicable to an RRC INACTIVE / IDLE state, and the coding rate does not need to be configured.

[0191] Or optionally, each kind of the second number is associated with a plurality of coding rates, then the UE may receive fifth configuration information, the fifth configuration information comprising information indicating one of the plurality of coding rates. For example, when an M value is associated with the plurality of coding rates, the UE determines a code block length as well as the coding bits based on the M value and an RRC configured coding rate and the number of the information bits of the wake-up signal. Such operation is more applicable to the RRC connected state, where the coding rate can be flexibly indicated and configured according to different scenarios.

[0192] Optionally, the second number is inversely proportional to the code block length; and / or, the second length is directly proportional to the code block length; and / or, the coding rate is inversely proportional to the code block length.

[0193] Exemplarily, when the information bits of the wake-up signal are 1, an example coding table is shown in Table 1, where c0 represents the original information bits of the wake-up signal. Table 1 shows an example of 1 bit information coding. When the information bits of the wake-up signal are 2, an example coding table is shown in Table 2, where c0 and c1 represent the original information bits of the wake-up signal, and c2=(c0+c1) mod 2. Table 2 shows an example of 2 bits information coding. Considering that the UE is configured to use a large value of M for increasing the data transmission rate under high SNR conditions, the relationship between M and the coding rate and / or the code block length should satisfy that the larger the value of M is, the shorter the code block length is, the fewer the number of OFDM symbols occupied for transmitting the same number of original information bits should be, and the higher the coding rate is.

[0194] MCoding RateCoding Bits11 / 4[c0 r r r]21 / 3[c0 r r]41 / 2[c0 r]

[0195] MCoding RateCoding Bits11 / 6[c0 c1 r r c2 c0 r r c1 c2 r r]22 / 9[c0 c1 r c2 c0 r c1 c2 r]41 / 3[c0 c1 c2 c0 c1 c2]

[0196] In a feasible implementation, coded base sequences of a time-domain OOK binary sequence corresponding to the wake-up signal and / or the length of the base sequences is related to the second number. That is, coded base sequences of a time-domain OOK binary sequence and / or the length of base sequences is related to the M value. Different M values correspond to different base sequences and / or base sequence lengths, and the base sequence lengths may be predefined or preconfigured based on the value of M. Optionally, the larger the M value is, the shorter the predefined or preconfigured base sequence lengths are. For example, the base sequence lengths are inversely proportional to the second number. Such operation is intended to ensure the data transmission rate while ensuring the reliability of transmission of the information bits, the larger the M value is, the shorter the coded block length is, and the fewer the number of OFDM symbols used for transmission is.

[0197] The embodiment of the present disclosure provides a feasible implementation for wake-up signal related configuration and monitoring behaviors.

[0198] In a feasible implementation, in the RRC connected state, quasi co-located (QCL) resources of the wake-up signal (LP-WUS) are determined by at least one of the following.

[0199] (1) A cell-specific PDCCH or cell-specific control resource set (CORESET) configured in an active downlink BWP;

[0200] For example, the QCL resources of the LP-WUS may be associated to a cell-specific PDCCH or CORESET configured in a same active downlink BWP in a same cell.

[0201] (2) A PDCCH or CORESET associated with a common search space (CSS) with the smallest index in a CSS set configured in the active downlink BWP;

[0202] For example, the QCL resources of the LP-WUS may be associated to a PDCCH or CORESET associated with a CSS with the smallest index in a CSS set configured in the same active downlink BWP in the same cell.

[0203] (3) A CORESET with the smallest index which is associated with a CSS set configured in the active downlink BWP;

[0204] For example, the QCL resources of the LP-WUS may be associated to a CORESET with the smallest index which is associated with a CSS set configured in the same active downlink BWP in the same cell.

[0205] Optionally, (1) to (3) apply to the case where the LP-WUS resources are configured within the active downlink BWP or the LP-WUS resources are determined to be configured within the active downlink BWP based on the UE capabilities. Such operation may enable different UEs to associate the QCL resources of their respective wake-up signals to the cell-specific CORESET, and is applicable when the network wakes up multiple UEs using the same wake-up signal sequence.

[0206] (4) A cell-specific PDCCH or cell-specific CORESET which is cell-configured with the smallest index;

[0207] For example, the QCL resources of the LP-WUS may be associated to a cell-specific PDCCH or CORESET which is configured in the same cell with the smallest index.

[0208] (5) A PDCCH or CORESET associated with a CSS with the smallest index in a cell-configured CSS set;

[0209] For example, the QCL resources of the LP-WUS may be associated to a PDCCH or CORESET associated with a CSS with the smallest index in the same cell-configured CSS set.

[0210] (6) A CORESET with the smallest index which is associated with a cell-configured CSS set;

[0211] For example, the QCL resources of the LP-WUS may be associated to a CORESET with the smallest index which is associated with the same cell-configured CSS set.

[0212] Optionally, (4) to (6) apply to the case where the LP-WUS resources are configured outside the active downlink BWP or the LP-WUS resources are determined to be configured outside the active downlink BWP based on the UE capabilities. Such operation may enable different UEs to associate the QCL resources of their respective wake-up signals to the cell-specific CORESET, and is applicable when the network wakes up multiple UEs using the same wake-up signal sequence.

[0213] (7) A UE-specific PDCCH or UE-specific CORESET with the smallest index which is configured in the active downlink BWP;

[0214] For example, the QCL resources of the LP-WUS may be associated to a first cell-specific PDCCH or CORESET configured in a same active downlink BWP in a same cell.

[0215] (8) A PDCCH or CORESET associated with a UE-specific search space (USS) with the smallest index in a USS set configured in the active downlink BWP;

[0216] For example, the QCL resources of the LP-WUS may be associated to a PDCCH or CORESET associated with a USS with the smallest index in a USS set configured in the same active downlink BWP in the same cell.

[0217] (9) A CORESET with the smallest index which is associated with a USS set configured in the active downlink BWP;

[0218] For example, the QCL resources of the LP-WUS may be associated to a CORESET with the smallest index which is associated with a USS set configured in the same active downlink BWP in the same cell.

[0219] Optionally, (7) to (9) apply to the case where the LP-WUS resources are configured within the active downlink BWP or the LP-WUS resources are determined to be configured within the active downlink BWP based on the UE capabilities. Such operation is more applicable to the case where the wake-up signal indicates the UE to monitor the UE-specific PDCCH.

[0220] (10) A UE-specific PDCCH or UE-specific CORESET which is cell-configured with the smallest index;

[0221] For example, the QCL resources of the LP-WUS may be associated to a UE-specific PDCCH or CORESET which is configured in the same cell with the smallest index.

[0222] (11) A PDCCH or CORESET associated with a USS with the smallest index in a cell-configured USS set;

[0223] For example, the QCL resources of the LP-WUS may be associated to a PDCCH or CORESET associated with a USS with the smallest index in the same cell-configured USS set.

[0224] (12) A CORESET with the smallest index which is associated with a cell-configured USS set.

[0225] For example, the QCL resources of the LP-WUS may be associated to a CORESET with the smallest index which is associated with the same cell-configured USS set.

[0226] Optionally, (10) to (12) apply to the case where the LP-WUS resources are configured outside the active downlink BWP or the LP-WUS resources are determined to be configured outside the active downlink BWP based on the UE capabilities. Such operation is applicable to the case where the wake-up signal indicates the UE to monitor the UE-specific PDCCH.

[0227] Optionally, that the PDCCH or CORESET described above contains indexes of SSB and / or CSI-RS resources indicated in a configured Transmission configuration Indicator (TCI) state may also be described that the PDCCH or CORESET contains an SSB and / or Channel State Information-Reference Signal (CSI RS) resource indicated by an SSB index and / or a CSI RS index in the TCI state configured for the PDCCH or CORESET. Such operation may implicitly determine the index of the unique QCL resource associated with the wake-up signal, saving signaling overhead.

[0228] In the embodiments of the present disclosure, if the UE receives a wake-up indication that the UE wakes up, the UE's behaviors comprise at least one of:

[0229] (1) restarting a BWP inactivity timer (BWP-InactivityTimer);

[0230] (2) temporarily suspending the running of the BWP inactivity timer, and restarting the running of the BWP inactivity timer if the UE monitors the PDCCH;

[0231] (3) temporarily suspending the running of the BWP inactivity timer, and resuming the running of the BWP inactivity timer if the UE does not monitor the PDCCH;

[0232] (4) temporarily suspending the running of the BWP inactivity timer, and resuming the running of the BWP inactivity timer upon completion of receiving a physical downlink shared channel (PDSCH) if the PDCCH is monitored and the PDCCH scheduled the PDSCH.

[0233] In a feasible implementation, when the number of UE subgroups associated with more than one paging occasion is less than or equal to W, a wake-up signal occasion can be associated to the more than one paging occasion, and when the wake-up signal is received by the UE within the wake-up signal occasion and the wake-up signal indicates the UE to wake up, the UE monitors the PDCCH within the associated paging occasion. When the number of UE subgroups associated with more than one paging occasion is greater than W, a wake-up signal occasion should be associated to a paging occasion. The W is the maximum of the number of subgroups that can be indicated by a wake-up signal, and W is an integer greater than 0, which may be a preconfigured or predefined value.

[0234] An embodiment of the present disclosure provides a method performed by a base station in a communication system. As shown in FIG. 5, the method comprises:

[0235] step S501: generating a set of overlaid OFDM sequences, the set of overlaid OFDM sequences being generated based on a first cyclic shift step, the first cyclic shift step being determined based on a first number, the first number being a number of overlaid OFDM sequences corresponding to each OOK ON chip, the set of overlaid OFDM sequences comprising the first number of overlaid OFDM sequences; and

[0236] step S502: transmitting information bits of a wake-up signal based on the set of overlaid OFDM sequences.

[0237] In an optional implementation, the first number has a first association relationship with a second number, the second number being a number of OOK chips comprised in an OFDM symbol.

[0238] In an optional implementation, the method further comprises:

[0239] transmitting first configuration information, the first configuration information comprising the second number,

[0240] wherein the first number is determined based on the second number and the first association relationship.

[0241] In an optional implementation, the set of overlaid OFDM sequences being determined based on a first cyclic shift step, comprises:

[0242] determining value(s) for cyclic shift based on the first cyclic shift step and the first number; and

[0243] determining the set of overlaid OFDM sequences based on the value(s) for cyclic shift and root sequences.

[0244] In an optional implementation, the method further comprises:

[0245] transmitting second configuration information, the second configuration information comprising a set of cyclic shift steps;

[0246] the first cyclic shift step being determined based on a first number, comprises:

[0247] determining a second cyclic shift step based on the first number; and

[0248] determining the first cyclic shift step based on the second cyclic shift step and the set of cyclic shift steps.

[0249] In an optional implementation, the first cyclic shift step is the maximum of values in the set of cyclic shift steps that are smaller than the second cyclic shift step.

[0250] In an optional implementation, the first number is inversely proportional to the second number.

[0251] In an optional implementation, the second number has a second association relationship with the first cyclic shift step;

[0252] each kind of the second number is associated with one first cyclic shift step; or

[0253] each kind of the second number is associated with multiple first cyclic shift steps, the method further comprises:

[0254] transmitting third configuration information, the third configuration information comprising information indicative of one of the multiple first cyclic shift steps.

[0255] In an optional implementation, the method further comprises:

[0256] transmitting fourth configuration information, the fourth configuration information comprising a logical root sequence index,

[0257] wherein the root sequences are determined in a first set of root sequences based on the logical root sequence index, the first set of root sequences is a predefined or preconfigured set of root sequences, or, the first set of root sequences is one set of root sequences determined from a plurality of sets of root sequences based on at least one of the second number, a first length of the overlaid OFDM sequences, and a largest prime number smaller than the first length, which are associated by the UE.

[0258] In an optional implementation, the first length is determined based on a bandwidth and the second number.

[0259] In an optional implementation, the first number of overlaid OFDM sequences are arranged in increasing order in correspondence with the information bits or subgroup indexes, respectively, based on increasing order of the value(s) for cyclic shift; and / or

[0260] the first number of overlaid OFDM sequences are arranged in increasing order in correspondence with codeword values, respectively, based on increasing order of the value(s) for cyclic shift.

[0261] In an optional implementation, the first configuration information and / or the third configuration information comprises a response to a radio resource control (RRC) request initiated by the UE.

[0262] In an optional implementation, the first configuration information and / or the fourth configuration information is further used to determine the set of overlaid OFDM sequences which corresponds to a first synchronization signal, the first synchronization signal being a signal used for synchronization of the wake-up signal.

[0263] In an optional implementation, a third number of OOK ON chips corresponding to the wake-up signal is determined based on at least one of the first number, a second length (number) of the information bits of the wake-up signal, or a coding rate.

[0264] In an optional implementation, the method further comprises:

[0265] transmitting the overlaid OFDM sequence corresponding to the third number of OOK ON chips which are consecutive; or

[0266] repeatedly transmitting the overlaid OFDM sequence corresponding to the third number of OOK ON chips.

[0267] In an optional implementation, the information bits associated with the overlaid OFDM sequence corresponding to the third number of OOK ON chips are spliced into first information bits from left to right in order of reception;

[0268] if a length (number) of the first information bits is greater than the second length, information bits in the first information bits that are greater than the second length are discarded by the UE, or, the information bits in the first information bits that are greater than the second length is the information bits of the wake-up signal from left to right.

[0269] In an optional implementation, a coded block length of a time-domain OOK binary sequence corresponding to the wake-up signal is determined based on at least one of the second number, a second length (number) of the information bits of the wake-up signal, or a coding rate.

[0270] In an optional implementation, each kind of the second number is associated with a coding rate; or

[0271] each kind of the second number is associated with a plurality of coding rates, the method further comprises:

[0272] transmitting fifth configuration information, the fifth configuration information comprising information indicative of one of the plurality of coding rates.

[0273] In an optional implementation, the second number is inversely proportional to the code block length; and / or

[0274] the second length is directly proportional to the code block length; and / or

[0275] the coding rate is inversely proportional to the code block length.

[0276] In an optional implementation, coded base sequences of a time-domain OOK binary sequence corresponding to the wake-up signal and / or the length of the base sequences is related to the second number.

[0277] In an optional implementation, the length of the base sequences is inversely proportional to the second number.

[0278] In an optional implementation, QCL resources of the wake-up signal are determined by at least one of:

[0279] a cell-specific PDCCH or cell-specific CORESET configured in an active downlink bandwidth part (BWP);

[0280] a PDCCH or CORESET associated with a common search space (CSS) with the smallest index in a CSS set configured in the active downlink BWP;

[0281] a CORESET with the smallest index which is associated with a CSS set configured in the active downlink BWP;

[0282] a cell-specific PDCCH or cell-specific CORESET which is cell-configured with the smallest index;

[0283] a PDCCH or CORESET associated with a CSS with the smallest index in a cell-configured CSS set;

[0284] a CORESET with the smallest index which is associated with a cell-configured CSS set;

[0285] a UE-specific PDCCH or UE-specific CORESET with the smallest index which is configured in the active downlink BWP;

[0286] a PDCCH or CORESET associated with a UE-specific search space (USS) with the smallest index in a USS set configured in the active downlink BWP;

[0287] a CORESET with the smallest index which is associated with a USS set configured in the active downlink BWP;

[0288] a UE-specific PDCCH or UE-specific CORESET which is cell-configured with the smallest index;

[0289] a PDCCH or CORESET associated with a USS with the smallest index in a cell-configured USS set; or

[0290] a CORESET with the smallest index which is associated with a cell-configured USS set.

[0291] In an optional implementation, the PDCCH or the CORESET comprises indexes of synchronization signal block (SSB) and / or channel state information reference signal (CSI-RS) resources indicated in a configured transmission configuration indicator (TCI) state.

[0292] The steps of the method performed by the base station according to the embodiment of the present disclosure correspond to the steps of the method performed by the UE, which have similar implementation principles and have corresponding technical effects. For a detailed functional description of the method performed by the base station, the description in the method performed by the UE shown in the above can be referred to, and will not be repeatedly described herein.

[0293] An embodiment of the present disclosure provides an electronic device comprising a processor, and optionally further comprising a transceiver and / or a memory coupled to the processor, the processor being configured to perform the steps of the method according to any optional embodiment of the present disclosure. Optionally, the electronic device may refer to a UE, whereby the processor is configured to implement the steps of the respective method embodiments performed by the UE, the detailed functional description and beneficial effects resulting therefrom may be specifically described hereinabove in the respective method embodiments performed by the UE, and will not be repeatedly described herein. Optionally, the electronic device may refer to a base station, whereby the processor is configured to implement the steps of the respective method embodiments performed by the base station, the detailed functional descriptions and the beneficial effects resulting therefrom may be referred to hereinabove in the description of the respective method embodiment performed by the base station, and will not be repeatedly described herein. In practical applications, the UE or the base station can be understood as different network nodes.

[0294] An embodiment of the present disclosure further provides an electronic device, including at least one controller / processor, and optionally at least one transceiver coupled to the at least one controller / processor. The processor is configured to implement the method provided in any one of optional embodiments of the present disclosure.

[0295] FIG. 6 shows a schematic structure diagram of an electronic device to which the solution of the embodiment of the present disclosure is applied. As shown in FIG. 6, the electronic device 6000 shown in FIG. 6 may include a processor 6001 and a memory 6003. The processor 6001 is connected to the memory 6003, for example, through a bus 6002. Optionally, the electronic device 6000 may further include a transceiver 6004 that can be used for data exchange, for example, transmission and reception of data, between the electronic device and other electronic device. It should be noted that, in practical applications, the number of transceiver 6004 is not limited to one, and the structure of the electronic device 6000 does not constitute any limitations to the embodiments of the present disclosure. Optionally, the electronic device may be gNB, UE or other entities or node in communication networks.

[0296] The processor 6001 may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), or a field programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logical blocks, modules and circuits described in connection with the present disclosure. The processor 6001 may also be a combination for realizing computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0297] The bus 6002 may include a path to transfer information between the components described above. The bus 6002 may be a peripheral component interconnect (PCI) bus, or an extended industry standard architecture (EISA) bus, etc. The bus 6002 may be an address bus, a data bus, a control bus, etc. For ease of presentation, the bus is represented by only one thick line in FIG. 6. However, it does not mean that there is only one bus or one type of buses.

[0298] The memory 6003 may be, but not limited to, read only memories (ROMs) or other types of static storage devices that can store static information and instructions, random access memories (RAMs) or other types of dynamic storage devices that can store information and instructions, may be electrically erasable programmable read only memories (EEPROMs), compact disc read only memories (CD-ROMs) or other optical disk storages, optical disc storages (including compact discs, laser discs, discs, digital versatile discs, blue-ray discs, etc.), magnetic storage media or other magnetic storage devices, or any other media that can carry or store desired program codes in the form of instructions or data structures and that can be accessed by computers.

[0299] The memory 6003 is used to store computer program for executing the solutions of the present disclosure, and is controlled by the processor 6001. The processor 6001 is used to execute the computer program stored in the memory 6003 to implement the solution provided in any method embodiment described above.

[0300] Embodiments of the present disclosure provide a computer-readable storage medium having a computer program stored on the computer-readable storage medium, the computer program, when executed by a processor, implements the steps and corresponding contents of the foregoing method embodiments.

[0301] Embodiments of the present disclosure also provide a computer program product including a computer program, the computer program when executed by a processor realizing the steps and corresponding contents of the preceding method embodiments.

[0302] The terms "first", "second", "third", "fourth", "1", "2", etc. (if present) in the specification and claims of this disclosure and the accompanying drawings above are used to distinguish similar objects and need not be used to describe a particular order or sequence. It should be understood that the data so used is interchangeable where appropriate so that embodiments of the present disclosure described herein can be implemented in an order other than that illustrated or described in the text.

[0303] It should be understood that while the flow diagrams of embodiments of the present disclosure indicate the individual operational steps by arrows, the order in which these steps are performed is not limited to the order indicated by the arrows. Unless explicitly stated herein, in some implementation scenarios of embodiments of the present disclosure, the implementation steps in the respective flowcharts may be performed in other orders as desired. In addition, some, or all of the steps in each flowchart may include multiple sub-steps or multiple phases based on the actual implementation scenario. Some or all of these sub-steps or stages can be executed at the same moment, and each of these sub-steps or stages can also be executed at different moments separately. The order of execution of these sub-steps or stages can be flexibly configured according to requirements in different scenarios of execution time, and the embodiments of the present disclosure are not limited thereto.

[0304] The above-mentioned description and the drawings are provided merely as examples to help readers to understand the present disclosure, and they should not be interpreted or aim to limit the scope of the present disclosure in any way. Although some embodiments are provided, it is apparent for those skilled in the art to adopt other similar implementation means based on the technical idea of the present disclosure without departing from the technical concept of the solution of the present disclosure.

Claims

1.A method performed by a user equipment (UE) in a communication system, the method comprising:determining a set of overlaid orthogonal frequency division multiplexing (OFDM) sequences based on a first cyclic shift step, the first cyclic shift step being determined based on a first number, the first number being a number of overlaid OFDM sequences corresponding to each on-off keying (OOK) ON chip, the set of overlaid OFDM sequences comprising the first number of overlaid OFDM sequences; anddetermining information bits of a wake-up signal based on the set of overlaid OFDM sequences.2.The method of claim 1, further comprising:receiving first configuration information including information on a second number, the second number being a number of OOK chips included in an OFDM symbol,wherein the first number has a first association relationship with the second number, and is determined based on the second number and the first association relationship.3.The method of claim 1, wherein determining the set of overlaid OFDM sequences based on the first cyclic shift step, comprises:determining values for cyclic shift based on the first cyclic shift step and the first number; anddetermining the set of overlaid OFDM sequences based on the values for cyclic shift and root sequences.4.The method of claim 1, further comprising:receiving second configuration information including a set of cyclic shift steps;determining a second cyclic shift step based on the first number; anddetermining the first cyclic shift step based on the second cyclic shift step and the set of cyclic shift steps, wherein the first cyclic shift step is the maximum of values in the set of cyclic shift steps that are smaller than the second cyclic shift step.5.The method of claim 2, wherein the second number has a second association relationship with the first cyclic shift step;each kind of the second number is associated with one first cyclic shift step; oreach kind of the second number is associated with multiple first cyclic shift steps, the method further comprises:receiving third configuration information, the third configuration information comprising information indicative of one of the multiple first cyclic shift steps.6.The method of claim 3, further comprising:receiving fourth configuration information including a logical root sequence index,wherein the root sequences are determined in a first set of root sequences based on the logical root sequence index,wherein the first set of root sequences is a predefined or preconfigured set of root sequences, or the first set of root sequences is a first set of root sequences determined from a plurality of sets of root sequences based on at least one of a second number, a first length of the overlaid OFDM sequences, and a largest prime number smaller than the first length, which are associated by the UE.7.The method of claim 3, wherein the first number of overlaid OFDM sequences are arranged in increasing order in correspondence with the information bits or subgroup indexes, respectively, based on increasing order of the value(s) for cyclic shift; and / orwherein the first number of overlaid OFDM sequences are arranged in increasing order in correspondence with codeword values, respectively, based on increasing order of the values for cyclic shift.8.The method of claim 2,wherein the first configuration information is further used to determine the set of overlaid OFDM sequences which corresponds to a first synchronization signal, the first synchronization signal being a signal used for synchronization of the wake-up signal, andwherein a coded block length of a time-domain OOK binary sequence corresponding to the wake-up signal is determined based on at least one of the second number, a second length of the information bits of the wake-up signal, or a coding rate.9.The method of claim 1, wherein a third number of OOK ON chips corresponding to the wake-up signal is determined based on at least one of the first number, a second length of the information bits of the wake-up signal, or a coding rate.10.The method of claim 9, further comprising:monitoring overlaid OFDM sequences corresponding to the third number of OOK ON chips which are consecutive, and stopping monitoring overlaid OFDM sequences corresponding to OOK ON chips after the third number of OOK ON chips; ormonitoring the overlaid OFDM sequences corresponding to the third number of OOK ON chips which are transmitted repeatedly; ormonitoring the overlaid OFDM sequences until complete information bits of the wake-up signal are monitored.11.The method of claim 9,wherein information bits associated with the overlaid OFDM sequences corresponding to the third number of OOK ON chips are spliced into first information bits from left to right in order of reception, andwherein, in case that a length of the first information bits is greater than the second length, information bits in the first information bits that are greater than the second length are discarded, or, the information bits in the first information bits that are greater than the second length is the information bits of the wake-up signal from left to right.12.The method of claim 1, wherein, in case that the UE receives a wake-up indication that the UE wakes up, the method further comprises at least one of:restarting a BWP inactivity timer;temporarily suspending the running of the BWP inactivity timer, and restarting the BWP inactivity timer if the PDCCH is monitored;temporarily suspending the running of the BWP inactivity timer, and resuming the running of the BWP inactivity timer if the PDCCH is not monitored; ortemporarily suspending the running of the BWP inactivity timer, and resuming the running of the BWP inactivity timer upon completion of receiving a physical downlink shared channel (PDSCH) if the PDCCH is monitored and the PDCCH scheduled the PDSCH.13.A method performed by a base station in a communication system, the method comprising:generating a set of overlaid orthogonal frequency division multiplexing (OFDM) sequences based on a first cyclic shift step, the first cyclic shift step being determined based on a first number, the first number being a number of overlaid OFDM sequences corresponding to each on-off keying (OOK) ON chip, the set of overlaid OFDM sequences comprising the first number of overlaid OFDM sequences; andtransmitting information bits of a wake-up signal based on the set of overlaid OFDM sequences.14.A user equipment (UE) in a communication system, the UE comprising:a transceiver; anda processor coupled to the transceiver and configured to:determine a set of overlaid orthogonal frequency division multiplexing (OFDM) sequences based on a first cyclic shift step, the first cyclic shift step being determined based on a first number, the first number being a number of overlaid OFDM sequences corresponding to each on-off keying (OOK) ON chip, the set of overlaid OFDM sequences comprising the first number of overlaid OFDM sequences, anddetermine information bits of a wake-up signal based on the set of overlaid OFDM sequences.15.A base station in a communication system, the base station comprising:a transceiver; anda processor coupled to the transceiver and configured to:generate a set of overlaid orthogonal frequency division multiplexing (OFDM) sequences based on a first cyclic shift step, the first cyclic shift step being determined based on a first number, the first number being a number of overlaid OFDM sequences corresponding to each on-off keying (OOK) ON chip, the set of overlaid OFDM sequences comprising the first number of overlaid OFDM sequences, andtransmit information bits of a wake-up signal based on the set of overlaid OFDM sequences.

Images