CN117641536A

CN117641536A - Method and equipment for low-power wake-up technology

Info

Publication number: CN117641536A
Application number: CN202210995450.3A
Authority: CN
Inventors: 吴敏; 李芃茹; 孙霏菲
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2024-03-01
Also published as: WO2024039180A1

Abstract

The present disclosure provides a method performed by a user equipment, UE, comprising: monitoring a wake-up signal comprising at least one data signal carrying wake-up information of at least one UE or at least one group of UEs, or common wake-up information; and executing corresponding actions based on the wake-up information carried by the at least one data signal.

Description

Method and equipment for low-power wake-up technology

Technical Field

The present application relates to the field of communications, and more particularly to methods and apparatus for designing low power wake-up signals.

Background

In order to meet the increasing demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or quasi 5G communication systems. Therefore, a 5G or quasi 5G communication system is also referred to as a "super 4G network" or a "LTE-after-system".

The 5G communication system is implemented in a higher frequency (millimeter wave) band, for example, a 60GHz band, to achieve a higher data rate. In order to reduce propagation loss of radio waves and increase transmission distance, beamforming, massive Multiple Input Multiple Output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, massive antenna techniques are discussed in 5G communication systems.

Further, in the 5G communication system, development of system network improvement is being performed based on advanced small cells, cloud Radio Access Networks (RANs), ultra dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, cooperative multipoint (CoMP), receiving-end interference cancellation, and the like.

In 5G systems, hybrid FSK and QAM modulation (FQAM) and Sliding Window Superposition Coding (SWSC) as Advanced Code Modulation (ACM), and Filter Bank Multicarrier (FBMC), non-orthogonal multiple access (NOMA) and Sparse Code Multiple Access (SCMA) as advanced access technologies have been developed.

Disclosure of Invention

According to an embodiment of the present disclosure, there is provided a method performed by a User Equipment (UE), including:

monitoring a wake-up signal comprising at least one data signal carrying wake-up information of at least one UE or at least one group of UEs, or common wake-up information;

and executing corresponding actions based on the wake-up information carried by the at least one data signal.

In one embodiment, the wake-up signal further comprises a synchronization signal, after which the at least one data signal is transmitted based on a physical signal sequence.

In one embodiment, a preset interval is reserved between a synchronization signal included in the wake-up signal and a data signal included in the wake-up signal, and the preset interval is predefined, preconfigured or reported by the UE; and/or

And the synchronization signal included in the wake-up signal and the data signal included in the wake-up signal meet the requirement of a minimum preset interval, and the minimum preset interval is predefined or reported by the UE.

In an embodiment, wherein the synchronization signal and/or the at least one data signal is modulated using On-Off Keying (OOK).

The method according to an embodiment of the present disclosure further comprises:

the wake-up signal is received by a low power receiver (Lower Power Receiver, LPR) which activates a primary communication receiver (Primary Communication Receiver, PCR) if the UE is woken up based on an indication of the wake-up signal.

In one embodiment, wherein performing the corresponding action comprises: performing a predefined behavior; or performing an action indicated by the at least one data signal.

In one embodiment, wherein the wake-up signal comprises a plurality of data signals, each for waking up a different UE or group of UEs,

Wherein the number of the plurality of data signals is predefined, preconfigured with system information, or preconfigured with UE-specific radio resource control (Radio Resource Control, RRC) signaling, or,

a first data signal of the plurality of data signals indicates information about the number of the plurality of data signals.

In one embodiment, wherein:

a preset interval is arranged between two adjacent data signals in the plurality of data signals, and the preset interval is predefined, preconfigured or reported by the UE; and/or

A requirement of a minimum preset interval is met between two adjacent data signals of the plurality of data signals, the minimum preset interval being predefined or reported by the UE.

In one embodiment, the data signal has a plurality of formats, and data signals of different formats are used for carrying information bits with different wake-up functions; wherein each format comprises at least one indication field comprising a predefined or preconfigured number of information bits.

In one embodiment, wherein the plurality of formats includes at least one of:

A format for carrying cell common wake-up information;

a format for carrying wake-up information for at least one UE or group of UEs;

a format for waking up the RRC-connected UE;

formats for waking up RRC idle state or inactive state UEs.

In one embodiment, the format of the data signal is determined by at least one of:

predefined;

pre-configured;

determined by a synchronization signal preceding the data signal;

a first data signal indication comprised by the wake-up signal;

indicated by a data signal preceding said data signal.

In one embodiment, a first data signal of the plurality of data signals uses a first format, the remaining data signals of the plurality of data signals use a second format,

the first format is used for bearing cell public wake-up information, and the second format is used for bearing wake-up information of specific UE or specific UE groups; or, the first format is used for bearing the public wake-up information of a specific UE group, and the second format is used for bearing the wake-up information of a specific UE or a specific UE subgroup in the specific UE group.

In an embodiment, the data signal comprises a plurality of information blocks, each of the plurality of information blocks being used for indicating wake-up information of one UE or a group of UEs, the number of information blocks comprised by the data signal being determined by at least one of:

Predefined;

pre-configured;

a first data signal indication comprised by the wake-up signal;

indicated by a data signal preceding said data signal.

In an embodiment, the physical signal sequence used by the synchronization signal comprised by the wake-up signal is generated based on predefined or preconfigured parameters or is selected from a plurality of predefined physical signal sequences.

In an embodiment, wherein the signal sequence used by the synchronization signal is generated based on predefined or preconfigured parameters, the parameters comprising at least one of the following parameters:

an identification ID of the cell;

a Cell radio network temporary identity (Cell-Radio Network Temporary Identifier, C-RNTI) value of the UE;

a temporary mobile subscriber identity (Temporary Mobile Subscriber Identity, TMSI) value of the UE;

an Identification (ID) of the UE;

and the index of the wireless frame/time slot/symbol where the synchronous signal is located.

In one embodiment, the signal sequence used by the synchronization signal is selected from a plurality of predefined physical signal sequences, including:

the physical signal sequence used by the synchronization signal is configured through system information or UE-specific RRC signaling; or,

The physical signal sequence used by the synchronization signal is determined by the UE blind detection.

In an embodiment, the number of information bits carried by the data signal is predefined, determined from a synchronization signal in the wake-up signal, or configured by system information or UE-specific RRC signaling.

In one embodiment, the wake-up information includes at least one of:

information indicating whether the data signal is the last data signal in the wake-up signal;

information indicating the number of data signals contained in the wake-up signal;

information indicating the number of other data signals following the data signal;

information indicating a format of other data signals subsequent to the data signal;

information indicating the number of information blocks included in other data signals following the data signal;

information for indicating an identification ID of the UE;

information for indicating an identification ID of the UE group;

information for indicating a C-RNTI of the UE;

information for indicating a TMSI of the UE;

information indicating a length of duration of physical downlink control channel (Physical Downlink Control Channel, PDCCH) listening to be performed by the UE;

Information for indicating a partial BandWidth (BWP) where PDCCH listening is to be performed by the UE;

information of a Search Space (SS) or a Search Space group (Search Space Group, SSG) for indicating a PDCCH listening to be performed by the UE;

information indicating a value of a discontinuous reception (Discontinous Reception, DRX) timer to be started by the UE;

information of a configuration index for a Semi-persistent scheduling (Semi-Persistent Scheduling, SPS) physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) indicating that the UE is to receive or skip;

information about dormant BWP for at least one secondary cell of the UE.

Information for indicating time domain energy saving of the base station;

information for indicating base station frequency domain energy saving;

information for indicating base station spatial domain energy saving;

information indicating that the network carrier domain is energy efficient.

In an embodiment, the location of the information block or the location of the start information bit corresponding to the UE is configured by UE-specific RRC signaling or determined according to the C-NRTI or TMSI of the UE.

In one embodiment, the information block includes at least one of the following information:

Information indicating whether the UE or group of UEs is awake;

information indicating dormant BWP of one or more serving cells of the UE.

Information for indicating an identification ID of the UE;

information for indicating an identification ID of the UE group;

information for indicating a C-RNTI of the UE;

information for indicating a TMSI of the UE;

information indicating a duration length of PDCCH listening to be performed by the UE;

information of the BWP where the PDCCH listening is located for indicating that the UE is to perform;

information indicating a search space SS or a search space group SSG where the PDCCH listening is to be performed by the UE;

information indicating a value of a DRX timer to be started by the UE;

information indicating a configuration index of an SPS-PDSCH to be received or skipped by the UE;

information about dormant BWP for at least one secondary cell of the UE.

The method according to the embodiment of the present disclosure further comprises:

receiving the plurality of data signals one by one, and skipping the reception of subsequent data signals after receiving wake-up information related to the UE; or alternatively

Receiving a first data signal in the plurality of data signals, determining whether a data signal to be received exists in subsequent data signals according to the indication information of the first data signal, if the data signal to be received exists, receiving the subsequent data signals one by one, after receiving wake-up information related to the UE, skipping the receiving of the subsequent data signals, and if the data signal to be received does not exist, skipping the receiving of all the subsequent data signals; or alternatively

Receiving a first data signal in the plurality of data signals, determining whether a data signal to be received exists in subsequent data signals according to the indication information of the first data signal, determining the sequence number of the data signal to be received, directly receiving the data sequence number corresponding to the sequence number if the data signal to be received exists, and skipping the receiving of all the subsequent data signals if the data signal to be received does not exist; or alternatively

Only one data signal of the plurality of data signals is received, and a sequence number of the one data signal in the plurality of data signals is configured through UE-specific RRC signaling or determined based on a C-RNTI or TMSI of the UE.

In one embodiment, wherein performing the corresponding action includes at least one of:

starting a continuous timer DRX-onduration timer of the DRX at a starting position of a next DRX cycle;

starting Physical Downlink Control Channel (PDCCH) monitoring after a third interval from the wake-up signal;

starting a continuous timer of DRX after being separated from the wake-up signal by a fourth interval, or starting a first DRX timer, wherein during the operation of the first DRX timer, the UE executes PDCCH monitoring;

Receiving an SPS PDSCH on resources of a next semi-persistent scheduling SPS PDSCH; and

and entering an operating mode in a network non-energy-saving state after being separated from the wake-up signal by a fifth interval.

In an embodiment, the third interval, the fourth interval or the fifth interval is predefined, preconfigured by higher layer signaling, reported by the UE, or indicated by the wake-up signal.

In an embodiment, the length of duration of the PDCCH listening is predefined, preconfigured by higher layer signaling, or indicated by the wake-up signal.

In one embodiment, the wake-up signal includes a plurality of data signals, and further includes:

the starting time point of the PDCCH monitoring is after a third interval from a data signal corresponding to the UE or after a third interval from the last data signal of the wake-up signal; and/or

The starting time point of the first DRX timer is after a fourth interval from a data signal corresponding to the UE or after a fourth interval from a last data signal of the wake-up signal;

the point in time of entering the network non-power saving state of operation is after a fifth interval from the last data signal of the wake-up signal.

In an embodiment, the PDCCH listening is directed to a full search space or a first search space, wherein an index number of the first search space is predefined, preconfigured by higher layer signaling, or indicated by the wake-up signal.

In an embodiment, the duration of the first DRX timer is the same as a DRX duration timer DRX-onduration timer or a DRX inactivity timer DRX-incactivity timer, or is predefined or preconfigured.

In an embodiment, wherein the index number of the SPS PDSCH is predefined, preconfigured by higher layer signaling, or indicated by the wake-up signal.

In one embodiment, wherein the UE listening for a wake-up signal comprises at least one of:

monitoring the wake-up signal in the non-active period of DRX;

monitoring the wake-up signal during the skipping of the PDCCH;

listening for the wake-up signal during a first time window associated with each DRX cycle while in a non-active period of DRX, wherein a starting position of the first time window is before and separated by a first interval and an ending position of the first time window is before and separated by a second interval or after the starting position of the DRX cycle and separated by a sixth interval;

Monitoring the wake-up signal in a second time window before each SPS PDSCH transmission opportunity;

and monitoring the wake-up signal in a network energy-saving state.

In an embodiment, wherein the first interval is predefined or preconfigured by high layer signaling, the second interval is predefined or reported by the UE, the sixth interval is predefined or preconfigured by high layer signaling, and the starting position and the ending position of the second time window are predefined or preconfigured.

The method according to the embodiment of the disclosure further comprises the steps of skipping the monitoring of the wake-up signal under a first condition and spontaneously executing a predetermined action at a preset time point, wherein the first condition comprises at least one of the following conditions:

the variation of the measured reference signal received power (Reference Signal Receiving Power, RSRP) over a preset period of time is greater than or equal to a first threshold;

the measured RSRP value is less than or equal to the second threshold value;

the duration of the absence of receipt of the wake-up signal is greater than or equal to a third threshold,

wherein the RSRP is obtained based on at least one measurement of a synchronization signal of a wake-up signal, a synchronization signal Block (Synchronization Signal/PBCH Block, SSB), a channel state information reference signal (Channel State Information Reference Signal, CSI-RS) of the UE.

In one embodiment, wherein the preset point in time comprises at least one of:

a starting position of a next DRX cycle;

a time point preconfigured by the base station;

a time point determined based on a time point when a primary communication receiver PCR of the UE last entered a sleep mode;

a point in time determined based on the time of occurrence of the first condition.

In an embodiment, whether or not the wake-up signal and the synchronization signal block SSB have a Quasi Co-Location (QCL) relation and/or a QCL type is preconfigured by the base station.

In one embodiment, the wake-up signal comprises a wake-up signal transmitted sequentially on a plurality of beams.

In one embodiment, wherein:

the synchronization signal and the data signal of the wake-up signal are sequentially transmitted together on the plurality of beams; or alternatively

The synchronization signals of the wake-up signals are sequentially transmitted separately in the plurality of beam directions, after which the data signals of the wake-up signals are sequentially transmitted separately in the plurality of beams.

In one embodiment, the plurality of beams have a one-to-one correspondence with the beams corresponding to the SSBs actually transmitted in the SSB burst set, or the plurality of beams are a subset of the set of beams corresponding to the SSBs actually transmitted in the SSB burst set.

According to an embodiment of the present disclosure, there is provided a method performed by a base station, including:

transmitting a wake-up signal to a user equipment, UE, to wake up the UE, the wake-up signal comprising at least one data signal carrying wake-up information or common wake-up information of at least one UE or at least one group of UEs, and

and after the UE is awakened based on the awakening signal, transmitting a downlink signal/channel to the UE, or receiving an uplink signal/channel transmitted by the UE.

According to an embodiment of the present disclosure, there is provided a communication apparatus including:

a transceiver configured to receive and/or transmit signals; and

a controller coupled with the transceiver and configured to perform a method according to one or more embodiments of the present disclosure.

Drawings

Fig. 1 is a general architecture of a wireless network;

fig. 2a and 2b are a transmit path and a receive path;

fig. 3a and 3b are block diagrams of a UE and a base station, respectively;

FIG. 4 is an example block diagram of a low power wake-up signal (Lower Power Wake Up Signal, LP-WUS);

FIG. 5 is an exemplary block diagram of the LP-WUS;

FIG. 6 is an example transmit pattern of LP-WUS;

FIG. 7 is an exemplary transmission pattern of LP-WUS;

Fig. 8 is a schematic block diagram of a communication device according to an embodiment of the present disclosure.

Detailed Description

The following description with reference to the accompanying drawings is provided to facilitate a thorough understanding of the various embodiments of the present disclosure as defined by the claims and their equivalents. The description includes various specific details to facilitate understanding but should be considered exemplary only. Accordingly, one 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.

The terms and phrases used in the following specification and claims are not limited to their dictionary meanings, but are used only by the inventors to enable a clear and consistent understanding of the disclosure. Accordingly, it should be apparent to those skilled in the art that the following descriptions of the various embodiments of the present disclosure are provided for illustration only and not for the purpose of limiting the disclosure as defined by the appended claims and their equivalents.

It should 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 such surfaces.

The terms "comprises" or "comprising" may refer to the presence of a corresponding disclosed function, operation or component that may be used in various embodiments of the present disclosure, rather than to the presence of one or more additional functions, operations or features. Furthermore, the terms "comprises" or "comprising" may be interpreted as referring to certain features, numbers, steps, operations, constituent elements, components, or combinations thereof, but should not be interpreted as excluding the existence of one or more other features, numbers, steps, operations, constituent elements, components, or combinations thereof.

The term "or" as used in the various embodiments of the present disclosure includes any listed term and all combinations thereof. For example, "a or B" may include a, may include B, or may include both a and B.

Unless defined differently, all terms (including technical or scientific terms) used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains. The general terms as defined in the dictionary are to be construed to have meanings consistent with the context in the relevant technical field, and should not be interpreted in an idealized or overly formal manner unless expressly so defined in the present disclosure.

Fig. 1 illustrates an example wireless network 100 in accordance with 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 this disclosure.

The wireless network 100 includes a gndeb (gNB) 101, a gNB 102, and a gNB 103.gNB 101 communicates with gNB 102 and gNB 103. The gNB 101 is also in communication with at least one Internet Protocol (IP) network 130, such as the Internet, a private IP network, or other data network.

Other well-known terms, such as "base station" or "access point", can be used instead of "gnob" or "gNB", depending on the network type. For convenience, the terms "gNodeB" and "gNB" are used in this patent document to refer to the network infrastructure components that provide wireless access for remote terminals. Also, other well-known terms, such as "mobile station", "subscriber station", "remote terminal", "wireless terminal" or "user equipment", can be used instead of "user equipment" or "UE", depending on the type of network. For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to a remote wireless device that wirelessly accesses the gNB, whether the UE is a mobile device (such as a mobile phone or smart phone) or a fixed device (such as a desktop computer or vending machine) as is commonly considered.

The gNB 102 provides wireless broadband access to the network 130 for a first plurality of User Equipment (UEs) within the coverage area 120 of the gNB 102. The first plurality of UEs includes: UE 111, which may be located in a Small Business (SB); UE 112, which may be located in enterprise (E); UE 113, may be located in a WiFi Hotspot (HS); UE 114, which may be located in a first home (R); UE 115, which may be located in a second home (R); UE 116 may be a mobile device (M) such as a cellular telephone, wireless laptop, wireless PDA, etc. The gNB 103 provides wireless broadband access to the network 130 for a second plurality of UEs within the coverage area 125 of the gNB 103. The second plurality of UEs includes UE 115 and UE 116. In some embodiments, one or more of the gNBs 101-103 are capable of communicating with each other and with UEs 111-116 using 5G, long Term Evolution (LTE), LTE-A, wiMAX, or other advanced wireless communication technology.

The dashed lines illustrate the approximate extent of coverage areas 120 and 125, which are shown as approximately circular for illustration and explanation purposes only. It should be clearly understood that coverage areas associated with the gnbs, such as coverage areas 120 and 125, can have other shapes, including irregular shapes, depending on the configuration of the gnbs and the variations in the radio environment associated with natural and man-made obstructions.

As described in more detail below, one or more of gNB 101, gNB 102, and gNB 103 includes a 2D antenna array as described in embodiments of the 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.

Although fig. 1 shows one example of a wireless network 100, various changes can be made to fig. 1. For example, the wireless network 100 can include any number of gnbs and any number of UEs in any suitable arrangement. Also, the gNB 101 is capable of communicating directly with any number of UEs and providing those UEs with wireless broadband access to the network 130. Similarly, each gNB 102-103 is capable of communicating directly with the network 130 and providing direct wireless broadband access to the network 130 to the UE. Furthermore, the gnbs 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).

Fig. 2a and 2b illustrate example wireless transmit and receive paths according to this disclosure. In the following description, transmit path 200 can be described as implemented in a gNB (such as gNB 102), while receive path 250 can be described as implemented in a UE (such as UE 116). However, it should be understood that the receive path 250 can be implemented in the gNB and the transmit path 200 can be implemented in the UE. In some embodiments, receive path 250 is configured to support codebook designs and structures for systems with 2D antenna arrays as described in embodiments of the present disclosure.

The transmit path 200 includes a channel coding and modulation block 205, a serial-to-parallel (S-to-P) block 210, an inverse N-point fast fourier transform (IFFT) block 215, a parallel-to-serial (P-to-S) block 220, an add cyclic prefix block 225, and an up-converter (UC) 230. The receive path 250 includes a down-converter (DC) 255, a remove cyclic prefix block 260, a serial-to-parallel (S-to-P) block 265, an N-point Fast Fourier Transform (FFT) block 270, a parallel-to-serial (P-to-S) block 275, and a channel decoding and demodulation block 280.

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

The RF signal transmitted from the gNB 102 reaches the UE116 after passing through the wireless channel, and an operation inverse to that at the gNB 102 is performed at the UE 116. Down-converter 255 down-converts the received signal to baseband frequency and remove cyclic prefix block 260 removes the cyclic prefix to generate a serial time domain baseband signal. Serial-to-parallel block 265 converts the time-domain baseband signal to a parallel time-domain signal. The N-point FFT block 270 performs an FFT algorithm to generate N parallel frequency domain signals. Parallel-to-serial block 275 converts the parallel frequency domain signals into a sequence of modulated data symbols. The channel decoding and demodulation block 280 demodulates and decodes the modulation symbols to recover the original input data stream.

Each of the gnbs 101-103 may implement a transmit path 200 that is similar to transmitting to UEs 111-116 in the downlink and may implement a receive path 250 that is similar to receiving from UEs 111-116 in the uplink. Similarly, each of the UEs 111-116 may implement a transmit path 200 for transmitting to the gNBs 101-103 in the uplink and may implement a receive path 250 for receiving from the gNBs 101-103 in the downlink.

Each of the components in fig. 2a and 2b can be implemented using hardware alone, or using a combination of hardware and software/firmware. As a specific example, at least some of the components in fig. 2a and 2b may be implemented in software, while other components may be implemented by configurable hardware or a mixture of software and configurable hardware. For example, the FFT block 270 and IFFT block 215 may be implemented as configurable software algorithms, wherein the value of the point number N may be modified depending on the implementation.

Further, although described as using an FFT and an IFFT, this is illustrative only and should not be construed 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 appreciated that for DFT and IDFT functions, the value of the variable N may be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of the variable N may be any integer that is a power of 2 (such as 1, 2, 4, 8, 16, etc.).

Although fig. 2a and 2b show examples of wireless transmission and reception paths, various changes may be made to fig. 2a and 2 b. For example, the various components in fig. 2a and 2b can be combined, further subdivided, or omitted, and additional components can be added according to particular needs. Also, fig. 2a and 2b are intended to illustrate examples of the types of transmit and receive paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communications in a wireless network.

Fig. 3a shows an example UE 116 according to this 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, the UE has a variety of configurations, and fig. 3a does not limit the scope of the present disclosure to any particular embodiment of the UE.

UE 116 includes an antenna 305, a Radio Frequency (RF) transceiver 310, transmit (TX) processing circuitry 315, a microphone 320, and Receive (RX) processing circuitry 325.UE 116 also includes speaker 330, processor/controller 340, input/output (I/O) interface 345, input device(s) 350, display 355, and memory 360. Memory 360 includes an Operating System (OS) 361 and one or more applications 362.

RF transceiver 310 receives an incoming RF signal from antenna 305 that is transmitted by the gNB of wireless network 100. The RF transceiver 310 down-converts the incoming RF signal to generate an Intermediate Frequency (IF) or baseband signal. The IF or baseband signal is sent to RX processing circuit 325, where RX processing circuit 325 generates a processed baseband signal by filtering, decoding, and/or digitizing the baseband or IF signal. The RX processing circuit 325 sends the processed baseband signals to a speaker 330 (such as for voice data) or to a processor/controller 340 (such as for web-browsing data) for further processing.

TX processing circuitry 315 receives analog or digital voice data from microphone 320 or other outgoing baseband data (such as network data, email, or interactive video game data) from processor/controller 340. TX processing circuitry 315 encodes, multiplexes, and/or digitizes the outgoing baseband data to generate a processed baseband or IF signal. RF transceiver 310 receives outgoing processed baseband or IF signals from TX processing circuitry 315 and up-converts the baseband or IF signals to RF signals for transmission via antenna 305.

Processor/controller 340 can include one or more processors or other processing devices and execute OS 361 stored in memory 360 to control the overall operation of UE 116. For example, processor/controller 340 may be capable of controlling the reception of forward channel signals and the transmission of reverse channel signals by RF transceiver 310, RX processing circuit 325, and TX processing circuit 315 in accordance with well-known principles. In some embodiments, processor/controller 340 includes at least one microprocessor or microcontroller.

Processor/controller 340 is also capable of executing other processes and programs resident in memory 360, such as operations for channel quality measurement and reporting for systems having 2D antenna arrays as described in embodiments of the present disclosure. Processor/controller 340 is capable of moving data into and out of memory 360 as needed to perform the process. In some embodiments, the processor/controller 340 is configured to execute the application 362 based on the OS 361 or in response to a signal received from the gNB or operator. The processor/controller 340 is also coupled to an I/O interface 345, where the I/O interface 345 provides the UE 116 with the ability to connect to other devices, such as laptop computers and handheld computers. I/O interface 345 is the communication path between these accessories and processor/controller 340.

The processor/controller 340 is also coupled to an input device(s) 350 and a display 355. An operator of UE 116 can input data into UE 116 using input device(s) 350. Display 355 may be a liquid crystal display or other display capable of presenting text and/or at least limited graphics (such as from a website). Memory 360 is coupled to processor/controller 340. A portion of memory 360 can include Random Access Memory (RAM) and another portion of memory 360 can include flash memory or other Read Only Memory (ROM).

Although fig. 3a shows one example of UE 116, various changes can be made to fig. 3 a. For example, the various components in FIG. 3a can be combined, further subdivided, or omitted, and additional components can be added according to particular needs. As a particular example, the processor/controller 340 can be divided into multiple processors, such as one or more Central Processing Units (CPUs) and one or more Graphics Processing Units (GPUs). Moreover, although fig. 3a shows the UE 116 configured as a mobile phone or smart phone, the UE can be configured to operate as other types of mobile or stationary devices.

Fig. 3b shows an example gNB 102 in accordance with the present disclosure. The embodiment of the gNB 102 shown in fig. 3b is for illustration only, and other gnbs of fig. 1 can have the same or similar configuration. However, the gNB has a variety of configurations, and fig. 3b does not limit the scope of the disclosure to any particular embodiment of the gNB. Note that gNB 101 and gNB 103 can include the same or similar structures as gNB 102.

As shown in fig. 3b, the gNB 102 includes a plurality of antennas 370a-370n, a plurality of RF transceivers 372a-372n, transmit (TX) processing circuitry 374, and Receive (RX) processing circuitry 376. In certain embodiments, one or more of the plurality of antennas 370a-370n comprises a 2D antenna array. The gNB 102 also includes a controller/processor 378, a memory 380, and a backhaul or network interface 382.

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

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

The controller/processor 378 can include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, controller/processor 378 may be capable of controlling the reception of forward channel signals and the transmission of backward channel signals via RF transceivers 372a-372n, RX processing circuit 376, and TX processing circuit 374 in accordance with well-known principles. The controller/processor 378 is also capable of supporting 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 by a BIS algorithm and decode the received signal from which the interference signal is subtracted. Controller/processor 378 may support any of a variety of other functions in gNB 102. In some embodiments, controller/processor 378 includes at least one microprocessor or microcontroller.

Controller/processor 378 is also capable of executing programs and other processes residing in memory 380, such as a basic OS. Controller/processor 378 is also capable of supporting channel quality measurements and reporting for systems having 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. Controller/processor 378 is capable of moving data into and out of memory 380 as needed to perform the process.

The controller/processor 378 is also coupled to a backhaul or network interface 382. The backhaul or network interface 382 allows the 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 through any suitable wired or wireless connection(s). For example, when the gNB 102 is implemented as part of a cellular communication system (such as one supporting 5G or new radio access technologies or NR, LTE, or LTE-a), the backhaul or network interface 382 can allow the gNB 102 to communicate with other gnbs over wired or wireless backhaul connections. When the gNB 102 is implemented as an access point, the backhaul or network interface 382 can allow the 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, such as an ethernet or RF transceiver, that supports communication over a wired or wireless connection.

A memory 380 is coupled to the controller/processor 378. A portion of memory 380 can include RAM and another portion of memory 380 can include flash memory or other ROM. In some embodiments, a plurality of instructions, such as BIS algorithms, are stored in memory. The plurality of instructions are configured to cause the controller/processor 378 to perform a BIS process and decode the received signal after subtracting the at least one interfering signal determined by the BIS algorithm.

As described in more detail below, the transmit and receive paths of the gNB102 (implemented using the RF transceivers 372a-372n, TX processing circuitry 374, and/or RX processing circuitry 376) support aggregated communications with FDD and TDD cells.

Although fig. 3b shows one example of the gNB102, various changes may be made to fig. 3 b. For example, the gNB102 can include any number of each of the components shown in FIG. 3 a. As a particular example, the access point can include a number of backhaul or network interfaces 382, and the controller/processor 378 can support routing functions to route data between different network addresses. As another particular example, while shown as including a single instance of TX processing circuitry 374 and a single instance of RX processing circuitry 376, the gNB102 can include multiple instances of each (such as one for each RF transceiver).

Exemplary embodiments of the present disclosure are further described below with reference to the accompanying drawings.

The text and drawings are provided as examples only to assist the reader in understanding the present disclosure. They are not intended, nor should they be construed, to limit the scope of the present disclosure in any way. While certain embodiments and examples have been provided, it will be apparent to those of ordinary skill in the art from this disclosure that variations can be made to the embodiments and examples shown without departing from the scope of the disclosure. Power saving technology has been an important design goal of communication systems, and in particular UE-side power saving technology is of great importance. In a 5G communication system, an important power saving technology is discontinuous reception (Discontinuous Reception, DRX) technology, in which in RRC idle/inactive state, the receiver of the UE is in sleep state for most of the time of a DRX cycle, and only needs to wake up periodically to monitor Paging Occasions (POs). In the RRC connected state, each DRX cycle includes an Active period (Active Time) and an inactive period (Non-Active Time), during the Active period, the UE needs to monitor the PDCCH, during the inactive period, the UE does not need to monitor the PDCCH, the UE starts a DRX-onduration timer at a starting position of each DRX cycle to start monitoring the PDCCH, during the transmission, if the UE monitors downlink control information (Downlink Control Information, DCI) for scheduling new data transmission, the UE starts a DRX-inactive timer, during the DRX Active period, the base station may instruct the UE to enter the DRX inactive period in advance through signaling, or when all the DRX timers of the UE stop running, the UE may enter the DRX inactive period. While existing power saving techniques are effective in saving UE power consumption, for some terminals requiring high battery life (e.g., IOT UEs, repCap UEs), the power saving level is far from sufficient, and herein, a related technical detail based on a wake-up signal (e.g., low power wake-up signal (Lower Power Wake Up Signal, LP-WUS)) is given. It should be understood that while the following description describes LP-WUS as an example of a wake-up signal, it is not intended to limit the wake-up signal used by the present disclosure to only LP-WUS, but rather, the principles of the present disclosure may be applied to other wake-up signals, or other signals as well.

Function of LP-WUS

In order to achieve power saving, the receiver of the UE may comprise two modules, one is a main communication receiving module (Primary Communication Receiver, PCR) for receiving the normal signal/channel transmitted by the base station, and the other is a receiving module (Lower Power Wake Up Receiver, LP-WUR) for receiving the LP-WUS transmitted by the base station, the LP-WUS being received using a dedicated module because the LP-WUS is based on OOK modulation, which is different from the OFDM-or SC-FDMA-based waveforms of the NR system, and the receiver may detect the OOK modulated signal based on energy monitoring, so that the LP-WUR may listen to the LP-WUS with very low power. If the LP-WUR listens to the LP-WUS, the LP-WUR may trigger the PCR to transition from the sleep phase to the active phase, and the PCR may perform a predetermined action after being activated.

In one embodiment, the RRC-connected UE receives configuration information of the LP-WUS, monitors the LP-WUS through the LP-WUR based on the configuration information, the LP-WUS may carry information for waking up at least one UE respectively, and/or the LP-WUS may carry information for waking up at least one UE group respectively, and/or the LP-WUS may carry common wake-up information. If the LP-WUR listens to the LP-WUS and the UE wakes up according to the indication of the LP-WUS, the LP-WUR may trigger PCR activation. The PCR may perform one of the following UE actions after being activated:

The UE starts the DRX on duration timer at the start of the next DRX cycle;

the UE starts PDCCH listening after a third interval of LP-WUS;

the UE starts a first DRX timer after a fourth interval of the LP-WUS, which may be, for example, a DRX duration timer DRX-onduration timer, or a DRX inactivity timer DRX-incactivity timer, or may be a newly defined DRX timer, using dedicated configuration parameters;

the UE receives or skips the SPS-PDSCH on the next semi-persistently scheduled PDSCH (SPS PDSCH) resource;

the UE switches from operating mode in base station power save state to operating mode in base station non-power save state after the fifth interval of LP-WUS.

Alternatively, the behavior of the UE after being woken up by the LP-WUS is predefined, e.g. the predefined behavior may be any of the above UE behaviors. For example, the system may configure one LP-WUS for one of the above-mentioned UE behaviors, i.e. the UE listens to only one LP-WUS configuration, if the UE is awakened by the LP-WUS, then perform a predefined UE behavior; alternatively, the system may configure the corresponding LP-WUS for the above-mentioned various UE behaviors, respectively, i.e. the UE listens to the multiple LP-WUS configurations, and if the UE is awakened by one LP-WUS, performs the corresponding predetermined behavior.

Optionally, the behavior of the UE after being woken up by the LP-WUS is configurable, i.e. one LP-WUS configuration may wake up the UE to perform any one of a plurality of predetermined behaviors, which UE behavior the UE performs after being woken up by the LP-WUS may be preconfigured by higher layer signaling, e.g. by system information or UE-specific RRC signaling; alternatively, which UE behavior is performed after the UE is awakened by the LP-WUS may be indicated by information carried by the LP-WUS.

In one alternative, the base station wakes up the UE through LP-WUS to start DRX-onduration timer at the start of the next DRX cycle. For example, the UE may monitor the LP-WUS during the inactive period (non-active time) of the DRX, and may not need to monitor the LP-WUS during the active period (active time), and if the UE monitors the LP-WUS, the UE may start the DRX-onduration timer at the start of the next DRX cycle. For example, the UE may monitor the LP-WUS within a time window (also referred to as a listening window) before the start position of each DRX cycle, and if the UE monitors the LP-WUS at a point in time within the listening window, then the LP-WUS monitoring is skipped at a subsequent time within the listening window. The position of the LP-WUS listening window may be determined according to a start position of the DRX cycle, for example, the start position of the LP-WUS listening window may be a position before the start position of the DRX cycle by a first interval, which may be predefined or preconfigured by high layer signaling, and the end position of the LP-WUS listening window may be a position before the start position of the DRX cycle by a second interval, which may be predefined or reported by the UE. For example, the value of the second interval may relate to the shortest processing time for the UE to wake up and be ready to start DRX-onduration timer at the start of the next DRX cycle.

In yet another alternative, the base station wakes the UE up the PDCCH listening after a third interval of the LP-WUS through the LP-WUS, e.g., the UE may listen to the LP-WUS during PDCCH skipping (skip) or during inactivity of DRX, and other times need not listen to the LP-WUS, if the LP-WUS is monitored, the UE may initiate the PDCCH listening at a location spaced apart from the LP-WUS by a third interval, e.g., the first slot or first symbol after the LP-WUS that satisfies the third interval initiates the PDCCH listening, which may be predefined, preconfigured through higher layer signaling, reported by the UE, or indicated by the LP-WUS. Here, the UE-initiated PDCCH listening may be a PDCCH listening on all or part of the search space, e.g., the PCR may only listen to PDCCHs on a specific search space after being woken up, the index number of which may be predefined, preconfigured by higher layer signaling, or indicated by LP-WUS. Furthermore, the length of duration for which the UE initiates PDCCH listening may be predefined, preconfigured by higher layer signaling, or indicated by the LP-WUS.

In yet another alternative, the base station wakes up the UE by the LP-WUS and starts a DRX timer after a fourth interval of the LP-WUS, which may be an existing duration timer DRX-onduration timer or an inactivity timer DRX-incapacity timer, and in case the DRX-onduration timer is started after the UE is woken up, this indicates that the position where the DRX duration timer is started may be more than the starting position of the DRX cycle, for example, the UE may start DRX-onduration timer at any position within a non-active period of DRX based on an indication of the LP-WUS, or the UE may start DRX-onduration timer at any position within a time window of the DRX cycle based on an indication of the LP-WUS; in case of starting the DRX-incapacity timer after the UE is woken up, this indicates that the condition that the DRX-incapacity timer is started may be more than that a new data schedule is received, for example, the UE may start the DRX-incapacity timer at any position within the inactivity period of the DRX based on the indication of the LP-WUS; in addition, the DRX timer may also be a newly defined DRX timer, similar to DRX-onduration timer and DRX-incarvitytimer, and the duration of the newly defined DRX timer may be specially configured as long as the newly defined DRX timer is running, the UE needs to monitor the PDCCH. For example, the UE may monitor the LP-WUS during the inactive period of DRX, and other times need not monitor the LP-WUS, if the UE R monitors the LP-WUS, the UE may start the DRX timer at a location a fourth interval after the LP-WUS, e.g., the first slot after the LP-WUS that satisfies the fourth interval starts the DRX timer, which may be predefined, preconfigured by higher layer signaling, reported by the UE, or indicated by the LP-WUS. Here, the value of the UE-initiated DRX timer (i.e., the operation duration) may be predefined, preconfigured by higher layer signaling, or indicated by the LP-WUS, or the configuration of the existing DRX-onduration timer or DRX-incactivity timer may also be reused.

Alternatively, the UE listens to the LP-WUS within a time window (also referred to as a listening window), and if the UE listens to the LP-WUS at a point in time within the listening window, then the LP-WUS listening is skipped at a subsequent time within the listening window. The position of the LP-WUS listening window may be determined according to a start position of the DRX cycle, for example, the start position of the LP-WUS listening window may be a position before the start position of the DRX cycle by a first interval, which may be predefined or preconfigured by high layer signaling, and the end position of the LP-WUS listening window may be a position after the start position of the DRX cycle by a sixth interval, which may be predefined or preconfigured by high layer signaling. If the UE listens to the LP-WUS and the LP-WUS contains the wake-up information of the UE, the position where the UE starts the DRX-onduration timer is the first time slot after the LP-WUS that satisfies the fourth interval and is located in the next DRX cycle, i.e. the earliest position where the UE starts the DRX-onduration timer is the start position of the next DRX cycle, the UE may start the DRX-onduration timer after the start position of the next DRX cycle, in other words, the base station may wake up the UE by the LP-WUS to start the DRX-onduration timer at any position in a time window of the DRX cycle, which is located in the front part of the DRX cycle, and the start position of the time window is the start position of the DRX cycle.

In yet another alternative, the base station instructs the UE to receive or skip PDSCH of Semi-persistent scheduling (Semi-Persistent Scheduling, SPS) through LP-WUS. For example, the UE may listen for the LP-WUS within a time window before each SPS-PDSCH transmission opportunity, the starting and/or ending position of the time window may be determined based on the time domain position of the SPS-PDSCH, the LP-WUS indicating whether the UE receives PDSCH on the corresponding SPS-PDSCH transmission opportunity, the configuration index number of the SPS-PDSCH may be predefined, pre-configured by higher layer signaling, or indicated by the LP-WUS.

In another alternative, the base station instructs the UE to switch from the operation mode in the base station power saving state to the operation mode in the base station non-power saving state after the fifth interval of the LP-WUS through the LP-WUS, in other words, the base station will switch from the base station power saving state to the base station non-power saving state after the fifth interval of the LP-WUS. For example, assuming that the base station is switched from an OFF state of time-domain power saving to an ON state, the base station may wake the UE from an operation mode in the OFF state of the base station to an operation mode in the ON state of the base station by LP-WUS, the OFF state means that the base station does not provide data service for any UE for power saving, the base station shuts down most of channel/signal transmission, only a small number of necessary channel/signal transmission is reserved, and the ON state means that the base station can provide normal data service for the UE and can normally transmit and receive all channel/signals. In addition, the LP-WUS may further indicate base station frequency domain energy saving information, base station space domain energy saving information, and/or network carrier energy saving information, for example, the base station frequency domain energy saving information includes information indicating an actual transmission bandwidth of the base station side, and the UE only needs to receive information within the actual transmission bandwidth; the base station spatial domain energy saving information includes information indicating whether each of the plurality of beams is turned off, if one beam is turned off, the UE does not need to receive a channel/signal of a corresponding beam direction, and if one beam is turned on, the UE may receive a channel/signal of a corresponding beam direction; the network carrier power saving information includes information indicating whether a certain carrier among the plurality of carriers is activated, and if one carrier is deactivated, the UE cannot receive or transmit a signal on a serving cell of the corresponding carrier, and if one carrier is activated, the UE can receive or transmit a signal on a serving cell of the corresponding carrier.

Construction and transport of LP-WUS

In one embodiment, the OOK modulation based LP-WUS may mainly include two part signals, a first part signal is called Synchronization (Synchronization) signal, abbreviated as WUS-SYNC, for the UE to acquire downlink Synchronization, and furthermore, WUS-SYNC may be used to determine that a second part signal is transmitted, that is, the UE receives the corresponding second part signal only after monitoring the first part signal; the second partial signal is called a Data (Data) signal, abbreviated WUS-Data, for carrying relevant information bits for waking up UEs, for example, WUS-Data is used for carrying information for waking up one UE, information for waking up a group of UEs, and/or common wake-up information, WUS-Data may wake up one or a plurality of UEs respectively, or WUS-Data wakes up all UEs listening to the WUS-Data. WUS-SYNC provides the basic synchronization for the receipt of WUS-Data, and therefore WUS-Data may immediately follow WUS-SYNC.

In an alternative, the synchronization signal and the Data signal of the LP-WUS always occur with each WUS-SYNC followed by the corresponding WUS-Data, the UE periodically listens to the LP-WUS, and on one LP-WUS transmission opportunity, the UE may or may not listen to the LP-WUS; in another alternative, the synchronization signals and Data signals of the LP-WUS are not accompanied, i.e. not every WUS-SYNC is followed by a corresponding WUS-Data, e.g. the synchronization signals of the LP-WUS are periodically sent for the UE to maintain synchronization and to make some necessary measurements, but only some synchronization signals are followed by a corresponding WUS-Data for waking up the UE or the UE group, the UE periodically listens to the LP-WUS, the UE can receive WUS-SYNC on every LP-WUS transmission opportunity, but may or may not listen to WUS-Data.

In another embodiment, the LP-WUS includes only WUS-SYNC, which may implicitly indicate the relevant information to wake up the UE through the signal sequence used. In yet another embodiment, the LP-WUS includes only WUS-Data, and the UE acquires downlink synchronization based on other periodic signals, periodically listens to WUS-Data while maintaining synchronization. In the following description, for simplicity of description, descriptions will be mainly given taking examples in which LP-WUS includes WUS-SYNC and WUS-Data, and WUS-Data always follows WUS-SYNC. It should be understood that this is merely exemplary and that the principles of the present disclosure may also be applied to other configurations with LP-WUS.

WUS-SYNC is essentially an OOK modulated physical signal Sequence (Sequence), which is transmitted after OOK modulation at the base station side, and monitored for the presence of WUS-SYNC based on the predefined physical signal Sequence at the UE side.

Alternatively, WUS-SYNC selects one from a plurality of predefined physical signal sequences, which of the plurality of predefined physical signal sequences the WUS-SYNC uses may be preconfigured, e.g. by system information, or UE-specific RRC signaling.

Alternatively, which of a plurality of predefined physical signal sequences is used by WUS-SYNC is not determined, and the UE determines which physical signal sequence is used by WUS-SYNC through blind detection, where WUS-SYNC may implicitly carry some information through the physical signal sequence used, e.g., WUS-SYNC may implicitly use the format of WUS-Data through the physical signal sequence used.

Further, the physical signal sequence used by WUS-SYNC may be generated based on predefined or preconfigured parameters, e.g., the physical signal sequence may be generated based on at least one of a cell physical ID, an ID of the UE, a C-RNTI value of the UE, a TMSI value of the UE, an index of a radio frame/slot/symbol in which WUS-SYNC is located.

WUS-Data is essentially an OOK modulated Data bit stream, and on the base station side, relevant information bits for UE wake-up are encoded and then sent out through OOK modulation, and on the UE side, WUS-Data is decoded based on the synchronization obtained by WUS-SYNC. Wherein the number of information bits of WUS-Data may be predefined. For example, the number of information bits of WUS-Data is fixed to a predefined value; alternatively, the number of information bits of WUS-Data, which one of which the number of information bits of WUS-Data uses, is selected from a plurality of predefined values, may be preconfigured, e.g. by system information, or UE-specific RRC signaling, or implicitly indicated by WUS-SYNC preceding WUS-Data.

In an alternative, WUS-SYNC is followed by a WUS-Data, as shown in FIG. 4, i.e. LP-WUS includes a WUS-SYNC and a WUS-Data.

In another alternative, as shown in FIG. 5, a WUS-SYNC may be followed by a plurality of WUS-Data, which are encoded and modulated, respectively, i.e., the LP-WUS includes one WUS-SYNC and a plurality of WUS-Data.

In one embodiment, the LP-WUS includes one WUS-SYNC and N WUS-Data, N being a positive integer that is predefined, or preconfigured by higher layer signaling; alternatively, the LP-WUS includes one WUS-SYNC and an indefinite number (a range of numbers) of WUS-Data, e.g., the number of WUS-Data the LP-WUS includes may vary from 1 to N, N is a positive integer greater than 1 pre-defined, or pre-configured by high-level signaling, the number of WUS-Data may be determined by the UE through blind detection, or the number of WUS-Data may be determined by the physical signal sequence used by the WUS-SYNC, or the number of WUS-Data may be indicated by the first WUS-Data therein, or each WUS-Data the LP-WSU includes indicates the number of subsequent WUS-Data, or each WUS-Data the LP-WSU includes indicates whether the WUS-Data is the last WUS-Data.

Alternatively, the LP-WUS includes a plurality of WUS-Data, which may carry the same information bits, i.e. a plurality of WUS-Data may be regarded as a repeated transmission of one WUS-Data; alternatively, the plurality of WUS-Data carries different information bits, e.g. the plurality of WUS-Data is used for waking up different UEs, or for waking up different groups of UEs, respectively.

In one alternative, the standard may define a plurality of formats for the information content of WUS-Data bearers, the formats specifying the indicated domain content carried by WUS-Data, different WUS-Data formats for carrying information bits of different content for different wake-up functions, e.g. there may be WUS-Data formats dedicated to waking up RRC idle state or inactive state UEs, there may be WUS-Data dedicated to waking up RRC connected state UEs, there may be WUS-Data formats dedicated to carrying cell common wake-up information, there may be WUS-Data formats dedicated to carrying wake-up information of a specific UE or a specific group of UEs. Each WUS-Data format comprises at least one indication field, the number of bits contained in each indication field may be predefined or preconfigured, and the UE may determine the content of the indication field it contains, in other words the number of information bits it contains, depending on the format it uses.

Optionally, the format used by WUS-Data is implicitly indicated by the physical signal sequence used by WUS-SYNC preceding the WUS-Data. For example, the UE determines the physical signal sequence used by WUS-SYNC through blind detection, and determines the format of WUS-Data corresponding to WUS-SYNC according to the determined physical signal sequence.

Alternatively, the LP-WUS includes a plurality of WUS-Data, which use the same format. For example, one WUS-Data may wake up one or M UEs, and the base station may wake up N or n×m UEs by N WUS-Data included in the LP-WUS.

Optionally, the LP-WUS comprises a plurality of WUS-Data using different formats, e.g. a first WUS-Data of the plurality of WUS-Data using a first format and the remaining WUS-Data of the plurality of WUS-Data using a second format, wherein the first format is used for carrying cell-common wake-up information and the second format is used for carrying cell-specific wake-up information for a specific UE or a specific group of UEs; alternatively, the first format is used to carry common wake-up information for a group of UEs and the second format is used to carry wake-up information for a particular UE or a subset of the particular UEs within the group of UEs.

Optionally, the LP-WUS includes a plurality of WUS-Data, a first WUS-Data of the plurality of WUS-Data being predefined in format, the first WUS-Data being indicative of a format of a subsequent WUS-Data; alternatively, the previous WUS-Data may indicate the format of the next WUS-Data.

In one alternative, WUS-Data may wake up a UE or a group of UEs; alternatively, WUS-Data may wake up a plurality of UEs or groups of UEs, respectively, i.e. WUS-Data contains a plurality of information blocks, each for waking up one UE or a group of UEs, in particular WUS-Data contains M information blocks, or WUS-Data contains 1 to M information blocks, M being a predefined or preconfigured positive integer greater than 1. In case the LP-WUS comprises a plurality of WUS-Data, the number of information blocks comprised by the first WUS-Data may be predefined, or preconfigured by higher layer signaling, the number of information blocks comprised by the remaining WUS-Data may be indicated by the first WUS-Data, or the previous WUS-Data indicates the number of information blocks comprised by the subsequent WUS-Data.

Alternatively, the LP-WUS contains multiple WUS-Data, the UE may receive WUS-Data one by one, and if the UE wakes up by one WUS-Data, the UE may skip the subsequent WUS-Data, otherwise the UE should continue to receive the subsequent WUS-Data.

Optionally, the LP-WUS includes a plurality of WUS-Data, the UE first receives a first WUS-Data therein, and determines whether there is WUS-Data in the subsequent WUS-Data that the UE needs to receive according to the indication information in the first WUS-Data, if there is WUS-Data in the subsequent WUS-Data that the UE needs to receive, the UE receives the remaining WUS-Data one by one until the UE is awakened by one WUS-Data, or the UE receives all WUS-Data completely; if there is no WUS-Data in the subsequent WUS-Data that the UE needs to receive, the UE directly skips all the remaining WUS-Data.

Optionally, the LP-WUS includes a plurality of WUS-Data, the UE first receives a first WUS-Data therein, determines whether there is WUS-Data in the subsequent WUS-Data that the UE needs to receive according to the indication information in the first WUS-Data, if there is WUS-Data in the subsequent WUS-Data that the UE needs to receive, the UE further determines a sequence number of the WUS-Data that needs to receive according to the indication information in the first WUS-Data, and directly receives the WUS-Data of the corresponding sequence number; if there is no WUS-Data in the subsequent WUS-Data that the UE needs to receive, the UE directly skips all the remaining WUS-Data. For example, the first WUS-Data of the LP-WUS indicates that the plurality of UE groups are each awakened, and further indicates in a subsequent plurality of WUS-Data, respectively, which UE or UEs in the corresponding UE group are each awakened.

Alternatively, the LP-WUS includes a plurality of WUS-Data, the UE receives only one of the WUS-Data, and the sequence number of the received WUS-Data in the plurality of WUS-Data may be preconfigured by higher layer signaling, determined according to the C-RNTI of the UE, or determined according to the TMSI of the UE.

In the foregoing description, the main function of the LP-WUS is to wake up the UE to perform a predetermined action at a location of a preset interval after the LP-WUS, such as starting a PDCCH listening or starting a first DRX timer, etc., assuming that the LP-WUS includes a plurality of WUS-Data, one option is that the UE performs the above-mentioned predetermined action at a location of a preset interval after the WUS-Data of the UE wake-up information, and another option is that the UE performs the above-mentioned predetermined action at a location of a preset interval after all WUS-Data of the LP-WUS.

In an alternative, the information bits of WUS-Data include a plurality of information blocks, each information block corresponds to a different UE or UE group, and each information block includes the same number of bits, so that the UE only needs to receive the information block of its own, in other words, one information bit of WUS-Data includes information bits for a plurality of UEs or UE groups. Optionally, the base station indicates the position of the information bits of the UE in the information bits of WUS-Data through higher layer signaling, e.g. the base station indicates to the UE which bit of WUS-Data is the start information bit of the UE. Optionally, the base station indicates the number of the information block of the UE in the plurality of information blocks through higher layer signaling, for example, the base station indicates to the UE what information block is the information block of the UE, and the UE determines the position of its information bit in the information bits of WUS-Data according to the number of the information block and the size of the information block. Wherein each information block may contain at least one indication field of:

A field for indicating whether the UE is awake, for example, a 1-bit indication field, if the indication value is "1", the corresponding UE is awake, and if the indication value is "0", the corresponding UE is not awake;

a field for indicating sleep information on at least one secondary cell of the UE, the sleep information may indicate whether the active BWP on the secondary cell is a sleep BWP.

A field for indicating a duration length for the UE to perform PDCCH listening;

a domain of the BWP where the UE is instructed to perform PDCCH listening;

a domain of a search space SS or a search space group SSG for instructing the UE to perform PDCCH listening;

a field for indicating a value of a UE-initiated DRX duration timer or a first DRX timer;

a field for a configuration index indicating SPS-PDSCH received or skipped by the UE;

considering the UE's receive processing delay for WUS-SYNC, an interval may be reserved between WUS-SYNC and WUS-Data that should satisfy the maximum receive processing delay for WUS-SYNC supported by the UE, the interval between WUS-SYNC and WUS-Data may be predefined, preconfigured by higher layer signaling, or reported by the UE; and/or the interval between WUS-SYNC and WUS-Data should meet the requirement of a minimum interval, which may be predefined or reported by the UE. Furthermore, in case the LP-WUS comprises a plurality of WUS-Data, an interval may be reserved between two neighboring WUS-Data, which should satisfy the maximum reception processing delay for WUS-Data supported by the UE, in consideration of the reception processing delay of WUS-Data by the UE, the interval between two neighboring WUS-Data may be predefined, preconfigured through higher layer signaling, or reported by the UE; and/or the interval between two adjacent WUS-Data should meet the requirement of a minimum interval, which may be predefined or reported by the UE.

In one alternative, the information bits of WUS-Data may contain a plurality of indication fields, for example, at least one of the following:

a field for indicating whether the WUS-Data at which the current LP-WUS is located is the last WUS-Data of the current LP-WUS, in other words, the indication field implicitly indicates whether there are other WUS-Data after the WUS-Data at which the current LP-WUS is located;

a field for indicating the number of other WUS-Data after the WUS-Data, or a field for indicating the number of WUS-Data the current LP-WUS includes;

a field for indicating the format of the other WUS-Data after the located WUS-Data;

a field for indicating the number of information blocks included by other WUS-Data after the WUS-Data where one information block is used to wake up one UE, or one group of UEs;

a field for indicating the ID of the awakened UE, wherein the UE ID may be pre-configured by higher layer signaling, determined based on the C-RNTI of the UE, determined based on the TMSI of the UE, indicating that a UE is awakened if the ID of the UE is indicated by the field;

a field for indicating the C-RNTI value of a awakened UE, indicating that a UE is awakened if the C-RNTI value of that UE is indicated by that field;

a field for indicating the TMSI value of a awakened UE, indicating that a UE is awakened if the TMSI value of that UE is indicated by this field;

A field for indicating the ID of the awakened UE group, wherein the UE group ID may be pre-configured by higher layer signaling, determined based on the C-RNTI of the UE, or determined based on the TMSI of the UE, indicating that all UEs within a UE group are awakened if the ID of that UE group is indicated by this field;

a field for indicating a length of duration for which the awakened UE performs PDCCH listening;

a domain of the BWP where the wake-up UE is instructed to perform PDCCH listening;

a field for indicating the search space SS or search space group SSG where the awakened UE performs PDCCH listening;

a field for indicating the value of the DRX duration timer or the first DRX timer initiated by the awakened UE;

a field for indicating a configuration index of SPS-PDSCH received by the awakened UE;

a field for indicating time domain power saving information of the base station, e.g. an ON state or an OFF state for indicating that the base station is in a time domain power saving, optionally also a duration for which the base station is to be in a corresponding time domain power saving state;

a field for indicating frequency domain energy saving information of the base station, e.g. a scaling factor for indicating an actual transmission bandwidth of the base station relative to a reference bandwidth;

a field for indicating spatial domain energy saving information of the base station, for example, for indicating whether each of the plurality of beams is turned on or off;

A field for indicating carrier energy saving information of the network, for example, for indicating whether each carrier of the plurality of carriers is activated.

The indication fields included in the information block or the indication fields included in the WUS-Data may be integrated into one indication field, that is, the integrated indication field is used to indicate a plurality of the information, that is, a plurality of the indication fields may be indicated jointly by one indication field. In addition, whether the indication field is included or not, and the number of bits of the indication field may be preconfigured through high layer signaling.

Rollback mechanism for LP-WUS

Since the LP-WUS is based on OOK modulation, so that LP-WUS listening can be implemented based on very low power consumption, but one disadvantage of OOK modulation is that the coverage performance of the LP-WUS is not as good as that of the conventional signal/channel in the NR system, i.e. the operating SNR point of the LP-WUS is higher, and the probability of missing a LP-WUS by a cell edge UE is higher in the coverage area of the existing cell of the NR system. In addition, when the downlink quality of the UE changes greatly, the UE may miss the LP-WUS, and if the UE does not monitor the LP-WUS for a long time, the actual situation may not be that the base station does not send the LP-WUS, but the UE may miss the LP-WUS, which makes the base station unable to wake up the UE to receive the downlink data in time, which has a great influence on the user experience, and therefore, it is necessary to specify a backoff mechanism of the LP-WUS.

In one embodiment, when a specific condition or event is met, the UE skips LP-WUS listening, or continues listening to LP-WUS but disregards the result of the LP-WUS listening, the UE autonomously performs predetermined actions including starting PDCCH listening, starting DRX on timer, starting first DRX timer, receiving SPS-PDSCH, switching to an operating mode in a base station non-power saving state, etc. as described above. For example, the UE may autonomously perform a predetermined action when at least one of the following conditions or events is met:

if the UE does not monitor the LP-WUS within the preset time range (e.g., the duration that the UE did not monitor the LP-WUS reaches a certain threshold), then the UE skips the LP-WUS monitoring and autonomously performs the predetermined action at the preset point in time. Where "no monitoring of LP-WUS" means no monitoring of WUS-SYNC of LP-WUS, or no monitoring of WUS-Data of LP-WUS (WUS-SYNC may be received), the preset time frame or the certain threshold may be predefined, or preconfigured.

If the amount of change in the RSRP value measured by the UE over a period of time exceeds a first preset threshold, or if the RSRP value measured by the UE is below a second preset threshold, the UE autonomously performs a predetermined action. Wherein the RSRP may be obtained based on SSB measurements or based on WUS-SYNC measurements or based on channel state information reference signal CSI-RS measurements, and the first preset threshold, the second preset threshold may be predefined or preconfigured.

In one alternative, the UE autonomously performs a predetermined action at a preset point in time when the above specific condition or event is satisfied, at least one of the preset points in time may be:

the preset time point is a starting point of the next DRX cycle, for example, the UE autonomously starts DRX-onduration timer at the starting point of the next DRX cycle;

the preset time point is preset by the base station, for example, the preset time point has periodicity, and the UE spontaneously performs a preset action at the latest preset time point after the specific condition or event is satisfied;

the preset time point is determined according to the time point when the PCR last entered the sleep mode, for example, assuming that the PCR of the UE last entered the sleep mode at the time point n, the UE autonomously performs a predetermined action after a preset interval of the time point n, the value of which may be predefined or preconfigured;

● The preset time point is determined according to the occurrence time of the specific condition or event, for example, the UE spontaneously performs a predetermined action at a time point after a preset interval of the occurrence time of the specific condition or event, and the value of the preset interval may be predefined or preconfigured;

in one alternative, the UE activates the PCR after being awakened by the LP-WUS, or the UE autonomously activates the PCR when the above specific condition or event is satisfied, if the predetermined action performed after the UE activates the PCR is to start PDCCH monitoring and the UE does not monitor DCI scheduling new data of the UE for a preset period of time, the UE may stop PDCCH monitoring, and set the PCR to switch to sleep mode and monitor the LP-WUS by WUR, the length of the preset period of time may be predefined or preconfigured.

Beam scanning of LP-WUS

In one embodiment, in order to guarantee coverage of LP-WUS in a high frequency network, LP-WUS can also be improved by transmitting in different analog beam directions, like other signals/channels in the NR system, WUS-SYNC and WUS-Data can be transmitted based on the UE's best downlink beam if the LP-WUS is designed to be UE-specific; if the LP-WUS is designed to be cell-specific or UE group-specific, WUS-SYNC and WUS-Data may be transmitted based on Beam scanning (Beam scanning) and have correspondence of beams between WUS-SYNC and WUS-Data, for example, WUS-SYNC and WUS-Data are sequentially transmitted in N Beam directions, the value of N will be described later, and N beams for transmitting WUS-SYNC and N beams for transmitting WUS-Data are identical or correspond, respectively, i.e., have a Quasi Co-Location (QCL) characteristic.

In the case where the LP-WUS is transmitted based on beam scanning, one LP-WUS transmission opportunity may use any of the following patterns:

as shown in FIG. 6, WUS-SYNC is sequentially transmitted in N beam directions, and WUS-Data is transmitted after all of the N beam directions of WUS-SYNC are transmitted, and WUS-Data is also sequentially transmitted in the N beam directions. The advantage of this design is that the UE can determine the optimal downstream beam direction based on the measurement of WUS-SYNC, and then directly receive WUS-Data of the corresponding beam direction, without receiving WUS-Data of different beam directions one by one, so as to achieve the purpose of saving UE power consumption.

● As shown in FIG. 7, WUS-SYNC in each beam direction is followed by WUS-Data in the same beam direction, and LP-WUS in the next beam direction is transmitted after both WUS-SYNC and WUS-Data of LP-WUS in one beam direction are transmitted until LP-WUS in N beam directions are sequentially transmitted. The benefit of this design is that if the UE's best downlink beam is the earlier one of the N beams, then the UE can receive WUS-Data earlier in time than would be possible after WUS-SYNC for all beam directions is transmitted, as shown in fig. 6, for the purpose of reducing the wake-up delay of the UE.

In one alternative, the beam used for LP-WUS transmission has an association with the beam used for SSB transmission, by which is meant that LP-WUS and SSB have QCL characteristics, i.e. it can be assumed that the radio link experienced by LP-WUS and SSB is the same at one or more of doppler shift, doppler spread, mean delay, delay spread, spatial reception parameters. In the existing NR system, for the FR1 frequency band, the NR system can support at most 8 analog beams, for the FR2 frequency band, the NR system can support at most 64 analog beams, each analog beam direction is represented by SSB index, that is, each SSB in the SSB burst set (SSB burst set) corresponds to one analog beam, and the actual number of analog beams used by the base station depends on the number of SSBs actually transmitted in the SSB burst set. Assuming that LP-WUS is transmitted based on N beam scans, the value of N may be determined by one of the following:

N default to the number of SSBs actually sent in SSB burst set, and the beams used by LP-WUS are associated one-to-one with the SSBs actually sent in SSB burst set, e.g., the first beam of LP-WUS is associated with the first SSB actually sent in SSB burst set, and so on.

The value of N is preconfigured by the base station, and the value of N is smaller than or equal to the number of SSBs actually transmitted in SSB burst set, if the value of N is smaller than the number of SSBs actually transmitted in SSB burst set, the base station also needs to indicate to the UE to which SSB index the N beams used by the LP-WUS are respectively associated, i.e. the corresponding beam set is preconfigured by the LP-WUS.

Alternatively, whether or not there is a QCL relationship between LP-WUS and SSB, and the type of QCL relationship, may be configured by the base station. Alternatively, the LP-WUS has no QCL relation with the SSB, and the number of beams (i.e. the value of N) for LP-WUS transmission is predefined or specifically configured by the base station.

Referring to fig. 8, a communication device 800 is also provided in accordance with an embodiment of the present disclosure. The communication device comprises at least one of a memory 801, a processor 802 and a transceiver 803. The processor is coupled with a transceiver for receiving and/or transmitting signals or information and a memory. The memory has stored thereon computer executable instructions that, when executed by the processor 602, perform at least one method corresponding to the above-described embodiments of the present disclosure. The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.

Those skilled in the art will appreciate that the present invention includes apparatuses related to performing one or more of the operations described herein. These devices may be specially designed and constructed for the required purposes, or may comprise known devices in general purpose computers. These devices have computer programs stored therein that are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., a computer) readable medium or any type of medium suitable for storing electronic instructions and respectively coupled to a bus, including, but not limited to, any type of disk (including floppy disks, hard disks, optical disks, CD-ROMs, and magneto-optical disks), ROMs (Read-Only memories), RAMs (Random Access Memory, random access memories), EPROMs (Erasable Programmable Read-Only memories), EEPROMs (Electrically Erasable Programmable Read-Only memories), flash memories, magnetic cards, or optical cards. That is, a readable medium includes any medium that stores or transmits information in a form readable by a device (e.g., a computer).

It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions can be implemented in a processor of a general purpose computer, special purpose computer, or other programmable data processing method, such that the blocks of the block diagrams and/or flowchart illustration are implemented by the processor of the computer or other programmable data processing method.

Those of skill in the art will appreciate that the various operations, methods, steps in the flow, acts, schemes, and alternatives discussed in the present invention may be alternated, altered, combined, or eliminated. Further, other steps, means, or steps in a process having various operations, methods, or procedures discussed herein may be alternated, altered, rearranged, disassembled, combined, or eliminated. Further, steps, measures, schemes in the prior art with various operations, methods, flows disclosed in the present invention may also be alternated, altered, rearranged, decomposed, combined, or deleted.

The foregoing is only a partial embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. A method performed by a user equipment, UE, comprising:

2. The method of claim 1, wherein the wake-up signal further comprises a synchronization signal, the at least one data signal following the synchronization signal, the synchronization signal transmitted based on a physical signal sequence.

3. The method according to any of claims 1-2, wherein the wake-up signal comprises a plurality of data signals, each for waking up a different UE or group of UEs,

wherein the number of the plurality of data signals is predefined, preconfigured with system information, or preconfigured with UE-specific radio resource control, RRC, signaling, or,

4. A method according to any of claims 1-3, wherein the data signal comprises a plurality of information blocks, each of the plurality of information blocks being for indicating wake-up information for one UE or group of UEs, the number of information blocks comprised by the data signal being determined by at least one of:

predefined;

pre-configured;

a first data signal indication comprised by the wake-up signal;

indicated by a data signal preceding said data signal.

5. The method of claim 2, wherein the wake-up signal comprises a synchronization signal that uses a physical signal sequence that is generated based on a predefined or preconfigured parameter or selected from a plurality of predefined physical signal sequences.

6. The method of claim 5, wherein the signal sequence used by the synchronization signal is generated based on predefined or preconfigured parameters including at least one of:

an identification ID of the cell;

a cell radio network temporary identifier C-RNTI value of the UE;

a temporary mobile subscriber identity TMSI value of the UE;

An identification, ID, of the UE;

7. The method of claim 5, wherein the signal sequence used by the synchronization signal is selected from a plurality of predefined physical signal sequences, comprising:

8. The method of any of claims 1-7, wherein the wake-up information comprises at least one of:

information for indicating an identification ID of the UE;

information for indicating an identification ID of the UE group;

Information for indicating a C-RNTI of the UE;

information for indicating a TMSI of the UE;

information indicating a duration length of physical downlink control channel, PDCCH, listening to be performed by the UE;

information of a partial bandwidth BWP where the PDCCH listening is located for indicating that the UE is to perform;

information indicating a value of a Discontinuous Reception (DRX) timer to be started by the UE;

information of a configuration index for a semi-persistent scheduling physical downlink shared channel SPS-PDSCH to be received or skipped by the UE;

information about dormant BWP for at least one secondary cell of the UE.

Information for indicating time domain energy saving of the base station;

information for indicating base station frequency domain energy saving;

information for indicating base station spatial domain energy saving;

information indicating that the network carrier domain is energy efficient.

9. The method of claim 4, wherein the location of the information block or the location of the start information bit corresponding to the UE is configured through UE-specific RRC signaling or determined according to C-NRTI or TMSI of the UE.

10. The method of claim 9, wherein the information block comprises at least one of the following information:

Information indicating whether the UE or group of UEs is awake;

information indicating dormant BWP of one or more serving cells of the UE.

Information for indicating an identification ID of the UE;

information for indicating an identification ID of the UE group;

information for indicating a C-RNTI of the UE;

information for indicating a TMSI of the UE;

information indicating a value of a DRX timer to be started by the UE;

information about dormant BWP for at least one secondary cell of the UE.

11. A method according to claim 3, further comprising:

12. The method of any of claims 1-11, wherein performing the corresponding action comprises at least one of:

13. The method of claim 1, wherein the UE listening for a wake-up signal comprises at least one of:

monitoring the wake-up signal in the non-active period of DRX;

monitoring the wake-up signal during the skipping of the PDCCH;

and monitoring the wake-up signal in a network energy-saving state.

14. The method of claim 1, further comprising skipping listening of the wake-up signal and autonomously performing a predetermined action at a preset point in time under a first condition, wherein the first condition comprises at least one of:

The variation of the measured Reference Signal Received Power (RSRP) in a preset time period is larger than or equal to a first threshold;

the measured RSRP value is less than or equal to the second threshold value;

wherein the RSRP is obtained based on at least one measurement of a synchronization signal of a wake-up signal, a synchronization signal block SSB, and a channel state information reference signal CSI-RS of the UE.

15. The method of claim 14, wherein the preset point in time comprises at least one of:

a starting position of a next DRX cycle;

a time point preconfigured by the base station;

16. The method according to any of claims 1-15, wherein whether there is a quasi co-sited QCL relation between the wake-up signal and synchronization signal block SSB, and/or the QCL type of the QCL relation is preconfigured by the base station.

17. The method of any of claims 1-15, wherein the wake-up signal comprises a wake-up signal transmitted sequentially on a plurality of beams.

18. The method according to claim 17, wherein:

19. A method performed by a base station, comprising:

20. A communication device, comprising:

a transceiver configured to receive and/or transmit signals; and

a controller coupled to the transceiver and configured to perform the method of any one of claims 1-19.