WO2025091493A1

WO2025091493A1 - Method, device and computer program product for wireless communication

Info

Publication number: WO2025091493A1
Application number: PCT/CN2023/129740
Authority: WO
Inventors: Xuan MA; Mengzhu CHEN; Xiaoying Ma; Qiujin GUO; Jun Xu; Bo Dai; Jianqiang DAI
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2023-11-03
Filing date: 2023-11-03
Publication date: 2025-05-08
Anticipated expiration: 2026-05-03

Abstract

A wireless communication method is disclosed. The method comprises transmitting, by a wireless communication terminal to a wireless communication node, a wake-up signal, WUS, wherein the WUS carries at least one of: information for triggering a Synchronization Signal Block, SSB, transmission on a first cell, information for triggering a System Information Block, SIB, transmission on a first cell, information for triggering a first cell on or off, or information for triggering a state transition on a first cell.

Description

METHOD, DEVICE AND COMPUTER PROGRAM PRODUCT FOR WIRELESS COMMUNICATION

This document is directed generally to wireless communications, and in particular to 5^th generation (5G) communications or 6^th generation (6G) communications.

For NR (new radio) , there are common signals and channels. For instance, the periodicity of SSB (Synchronization Signal Block) and/or SIB (System Information Block) transmissions reduces network sleep opportunities and increases network power consumption, especially during periods of low or no load. To achieve energy savings within the network, reducing DL (downlink) common signals/channels, such as eliminating or enabling on-demand SSB and/or SIB transmissions in specific cells, can be considered. However, without requests from UEs (user equipments) , the gNB cannot obtain SSB/SIB transmission requirements in timely, leading to a poor user experience.

This document relates to methods, systems, and computer program products for a wireless communication.

One aspect of the present disclosure relates to a wireless communication method. In an embodiment, the wireless communication method includes: transmitting, by a wireless communication terminal to a wireless communication node, a wake-up signal, WUS, wherein the WUS carries at least one of: information for triggering a Synchronization Signal Block, SSB, transmission on a first cell, information for triggering a System Information Block, SIB, transmission on a first cell, information for triggering a first cell on or off, or information for triggering a state transition on a first cell.

Another aspect of the present disclosure relates to a wireless communication method. In an embodiment, the wireless communication method includes: receiving, by a wireless communication node from a wireless communication terminal, a wake-up signal, WUS, wherein the WUS carries at least one of: information for triggering a Synchronization Signal Block, SSB, transmission on a first cell, information for triggering a System Information Block, SIB, transmission on a first cell, information for triggering a first cell on or off, or information for triggering a state transition on a first cell.

Another aspect of the present disclosure relates to a wireless communication terminal. In an embodiment, the wireless communication terminal includes a communication unit and a processor. The processor is configured to: transmit, via the communication unit to a wireless communication node, a wake-up signal, WUS, wherein the WUS carries at least one of: information for triggering a Synchronization Signal Block, SSB, transmission on a first cell, information for triggering a System Information Block, SIB, transmission on a first cell, information for triggering a first cell on or off, or information for triggering a state transition on a first cell.

Another aspect of the present disclosure relates to a wireless communication node. In an embodiment, the wireless communication node includes a communication unit and a processor. The processor is configured to: receive, via the communication unit from a wireless communication terminal, a wake-up signal, WUS, wherein the WUS carries at least one of: information for triggering a Synchronization Signal Block, SSB, transmission on a first cell, information for triggering a System Information Block, SIB, transmission on a first cell, information for triggering a first cell on or off, or information for triggering a state transition on a first cell.

Various embodiments may preferably implement the following features:

Preferably, the WUS is transmitted on one or more WUS transmission occasions, and the WUS transmission occasion satisfies at least one of:

the WUS transmission occasion associates with a WUS configuration period, and the WUS configuration period comprises the one or more WUS transmission occasions;

one WUS transmission occasion associates N transmitted first signals, and N is a positive number;

a K-th WUS transmission occasion in a WUS configuration period is associated with a K-th transmitted first signal, and K is a positive integer; or

a [x*S+K] -th WUS transmission occasion in a WUS configuration period associates with a K-th transmitted first signal, x is a non-negative integer, K is a positive integer not larger than S, and S is the number of transmitted first signal.

Preferably, in response to N>1, the transmitted first signal mapped to the WUS transmission occasion in at least one of:

increasing order of frequency resource indexes for frequency multiplexed WUS transmission occasions; or

increasing order of time resource indexes for time multiplexed WUS transmission occasions.

Preferably, the first signal comprises at least one of:

a second signal;

a discovery reference signal, DRS;

a physical random access channel, PRACH occasion;

a Sounding Reference Signal, SRS;

a channel status information reference signal, CSI-RS;

a Tracking Reference Signal, TRS;

a synchronization signal block, SSB; or

an SSB transmitted on a target cell.

Preferably, the first signal to WUS transmission occasions is mapped in an association period, and the association period is determined based on at least one of: a WUS configuration period, a cycle of the one or more first signals, a cycle of the one or more WUS transmission occasions, a pre-determined value, or a high layer parameter.

Preferably, a mapping between one or more WUS transmission occasions and one or more transmitted first signals satisfies at least one of:

each transmitted first signal is mapped to at least one WUS transmission occasion within an association period;

one WUS transmission occasion associates with one or more consecutive transmitted first signals within an association period;

a number of times that the transmitted first signals mapped to the WUS transmission occasions is the same; or

the WUS transmission occasion that not mapping to the transmitted first signals is invalid.

Preferably, the WUS is transmitted according to a spatial relation with a reference signal, wherein the reference signal comprises at least one of:

a first signal;

a CSI-RS;

a TRS;

an SRS;

a second signal; or

a synchronization signal/physical broadcast channel, SS/PBCH, block.

Preferably, a WUS transmission occasion is valid in response to at least one of:

the WUS transmission occasion does not overlap with a valid PRACH occasion;

the WUS transmission occasion is not overlapped with a DL symbol;

the WUS transmission occasion is not overlapped with a symbol of an SS/PBCH block; or

the WUS transmission occasion starts at least G symbols after a last symbol for a transmission of the first signal, wherein G is a positive integer.

Preferably, the wireless communication terminal performs at least one of:

detecting first signals and selecting a first signal among the first signals according to measurement results of the first signals; or

transmitting the WUS on one or more WUS transmission occasions associated with the selected first signal.

Preferably, the wireless communication terminal identifies a cell as a first cell based on at least one of:

an identifier associated with the cell;

a physical cell identity, PCI, of the cell; or

one or more signals transmitted on the cell.

Preferably, an identifier associated with a cell is associated with at least one of: a physical cell identity, PCI, a cell identity, or a serving cell index.

Preferably, the identifier of the cell is configured by at least one of:

a Radio Resource Control, RRC, message;

a Master Information Block, MIB;

a System Information Block, SIB;

a core network; or

a Non-Access Stratum, NAS.

Preferably, the first cell satisfies at least one of:

the first cell is a network energy saving, NES, cell;

the first cell is an SSB-less secondary cell, SCell;

the first cell is an SIB-less cell;

the first cell supports a WUS transmission;

only on-demand SSB is transmitted on the first cell; or

only on-demand SIB is transmitted on the first cell.

Preferably, the WUS is associated with at least one of: a PCI, a cell identity, a serving cell index, a user equipment, UE, ID, or a group ID.

Preferably, the wireless communication terminal detects a second signal on the first cell.

Preferably, the second signal satisfies at least one of:

the second signal comprises at least one of: a simplified SSB, a discovery reference signal, DRS, a secondary reference signal, SSS or a primary reference signal, PSS;

the second signal is transmitted periodically; or

the second signal is transmitted in a first duration.

Preferably, the wireless communication node transmits first signals to allow the wireless communication terminal perform at least one of:

detecting the first signals and selecting a first signal among the first signals according to measurement results of the first signals; or

Preferably, a cell is identified as a first cell based on at least one of:

an identifier associated with the cell;

a physical cell identity, PCI, of the cell; or

one or more signals transmitted on the cell. The present disclosure relates to a computer program product comprising a computer-readable program medium code stored thereupon, the code, when executed by a processor, causing the processor to implement a wireless communication method recited in any one of foregoing methods.

Preferably, the wireless communication node transmits a second signal on the first cell.

The exemplary embodiments disclosed herein are directed to providing features that will become readily apparent by reference to the following description when taken in conjunction with the accompanying drawings. In accordance with various embodiments, exemplary systems, methods, devices and computer program products are disclosed herein. It is understood, however, that these embodiments are presented by way of example and not limitation, and it will be apparent to those of ordinary skill in the art who read the present disclosure that various modifications to the disclosed embodiments can be made while remaining within the scope of the present disclosure.

Thus, the present disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. Additionally, the specific order and/or hierarchy of steps in the methods disclosed herein are merely exemplary approaches. Based upon design preferences, the specific order or hierarchy of steps of the disclosed methods or processes can be re-arranged while remaining within the scope of the present disclosure. Thus, those of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or acts in a sample order, and the present disclosure is not limited to the specific order or hierarchy presented unless expressly stated otherwise.

The above and other aspects and their implementations are described in greater detail in the drawings, the descriptions, and the claims.

FIG. 1 shows a schematic diagram of WUS (wake-up signal) transmission occasions according to an embodiment of the present disclosure.

FIG. 2 shows a schematic diagram of WUS transmission occasions according to an embodiment of the present disclosure.

FIG. 3 shows a schematic diagram of WUS transmission occasions according to an embodiment of the present disclosure.

FIG. 4 shows a schematic diagram of WUS transmission occasions according to an embodiment of the present disclosure.

FIG. 5 shows a schematic diagram of WUS transmission occasions according to an embodiment of the present disclosure.

FIG. 6 shows a schematic diagram of WUS transmission occasions according to an embodiment of the present disclosure.

FIG. 7 shows a schematic diagram of WUS transmission occasions according to an embodiment of the present disclosure.

FIG. 8 shows an example of a schematic diagram of a wireless communication terminal according to an embodiment of the present disclosure.

FIG. 9 shows an example of a schematic diagram of a wireless communication node according to an embodiment of the present disclosure.

FIGs. 10 and 11 show flowcharts of wireless communication methods according to some embodiments of the present disclosure.

Some embodiments of the present disclosure provide a signal processing method to convey user requirement information and facilitate information interaction between a UE and a gNB.

In some embodiments, the UE transmits an uplink wake-up signal (WUS) to a gNB, wherein the WUS carries at least one of the information: an indication triggering the SSB transmission on a first cell, and/or an indication triggering the SIB transmission on a first cell (e.g., served by the gNB) , triggering a cell on/off, and/or triggering state transition. In some embodiments, the SIB comprises at least one of the SIB1, or the OSI (other system information) .

In some embodiments, triggering SSB transmission comprises at least one of triggering SSB transmission for N times (N≥1) , triggering SSB transmission periodically, triggering SSB transmission with a new cycle, and/or triggering SSB corresponding to one or more indexes transmission.

In some embodiments, triggering state transition comprises at least one of triggering cell state transition, and/or triggering common signal transmission state transmission, wherein the common signal comprises at least one of SSB, SIB1, paging, and/or PRACH.

In the paragraphs below, some aspects of the present disclosure will be described, but the present disclosure is not limited thereto. Besides, different aspects described below can be combined unless expressly stated otherwise.

WUS transmission occasion

In some embodiments, the WUS is transmitted on WUS transmission occasions.

In some embodiments, a WUS occasion includes one or more WUS transmission occasions. In some embodiments, a WUS occasion can consist multiple time slots or multiple OFDM (Orthogonal Frequency Division Multiplexing) symbols where the WUS can be transmitted. In some embodiments, the WUS occasions is periodic. In some embodiments, the cycle of the WUS occasions is configured by RRC (Radio Resource Control) messages or SIB.

In some embodiments, the WUS occasion or WUS transmission occasion is determined by at least one of a cycle, an offset, and/or a start point.

In some embodiments, the WUS occasion or WUS transmission occasion is associated with a WUS configuration period. Each WUS configuration period comprises one or more WUS transmission occasions. In some embodiments, at least one of the WUS configuration period, the time domain resource for the WUS occasion or WUS transmission occasion, and/or the frequency domain resource for the WUS occasion or WUS transmission occasion are configured by an RRC message or SIB or MIB (Master Information Block) . In some embodiments, each WUS transmission occasion corresponds to a WUS transmission occasion index. In some embodiments, within a WUS configuration period, the numbering of the WUS transmission occasion index starts from zero and increments.

In some embodiments, one or more the WUS transmission occasions are associated with one or more first signals. In some embodiments, the first signal comprises at least one of a simplified SSB, a DRS (discovery reference signal) , a PRACH (physical random access channel) occasion, an SRS (sounding reference signal) , a CSI-RS (channel status information reference signal) , a TRS (Tracking Reference Signal) , an SSB and/or an SSB transmitted on a target cell. In some embodiments, the DRS comprises one or more DRS resources. In some embodiments, the CSI-RS comprises one or more CSI-RS resources. In some embodiments, the SRS comprises one or more SRS resources. In some embodiments, the TRS comprises one or more TRS resources. In some examples, the target cell can be an anchor cell, a PCell (primary cell) , or a non-anchor cell. In some examples, the target cell can be identical or different from the first cell.

In some embodiments, each transmitted first signal corresponds to a first signal index (e.g., an index of a first signal) .

In some embodiments, the WUS transmission occasion associates with N transmitted first signals. In some embodiments, N is pre-defined. For example, N=1. In some embodiments, N is configured by a high layer parameter or SIB.

When the value of N is larger than 1, one WUS transmission occasion associates with multiple consecutive first signals (see FIG. 1) . For example, N consecutive first signals (or the first signal indexes) is mapped to one WUS transmission occasion. When the value of N is smaller than 1, multiple WUS transmission occasions associate with one first signal (see FIG. 2) . For example, one first signal (or the first signal index) is mapped to 1/N consecutive valid WUS transmission occasions.

In some embodiments, the WUS transmission occasion associates with N transmitted first signals, each transmitted first signal corresponds to an index. When N is larger than 1, the WUS transmitted on the transmission occasion associates with the first signal index in increasing order. In some embodiments, each WUS transmission occasion corresponds to a transmission resource, wherein the transmission resource comprises one or more symbols in time domain and one or more RBs (resource block) in frequency domain. In some embodiments, the WUS transmitted in a transmission resource with frequency division multiplexing. In some embodiments, the WUS transmitted in a transmission resource with time division multiplexing. In some embodiments, the transmitted first signal mapped to the WUS transmission occasion in increasing order of frequency resource indexes for frequency multiplexed WUS transmission occasions. In some embodiments, the transmitted first signal mapped to the WUS transmission occasion in increasing order of time resource indexes for time multiplexed WUS transmission occasions. For examples, when N = 2, the first half of the transmission resource (e.g., the resource of the wake-up signal) corresponds to first signal index = 0, and the remaining part of the wake-up signal resource corresponds to first signal index = 1. In some examples, the transmission resource can be sorted in increasing order of frequency resource indexes for frequency multiplexed WUS transmission occasions. In some examples, the transmission resource can be sorted in increasing order of time resource indexes for time multiplexed WUS transmission occasions. In some examples, the transmission resource can be sorted in increasing order of indexes for WUS transmission slots.

In some embodiments, the K-th WUS transmission occasion in a WUS configuration period or in a WUS occasion is associated with the K-th transmitted first signal. In some embodiments, the WUS transmission occasions have no corresponding transmitted first signals may not be used for WUS transmissions, or invalid.

For examples, under the condition that each WUS transmission occasions associates with one first signal resource (e.g., the resource of the first signal) , when the number of the WUS transmission occasions is larger than the number of transmitted first signals, the WUS transmission occasions not corresponding to any transmitted first signals may not be used for the WUS transmissions (see FIG. 3) .

In some embodiments, each transmitted first signal associates with X WUS transmission occasions. In some embodiments, the number of the WUS transmission occasions in a WUS configuration period or in a WUS occasion is equal to X times of the number of transmitted first signals, wherein X≥1. In some examples, X is determined by an RRC message or SIB. In some other examples, X is pre-defined. In some embodiments, the [x*S+K] -th WUS transmission occasion in a WUS configuration period or in a WUS occasion associates with the K-th transmitted first signal, where x = 0, 1, …, X-1, K = 1, 2, …, S, and S is the number of transmitted first signal (see FIG. 4) .

In some embodiments, each transmitted first signal associates with X WUS transmission occasions. In some embodiments, the K-th WUS transmission occasion associated with the ceil (K/X ) -th transmitted first signal.

In some embodiments, the first signals (or the first signal indexes) to the WUS transmission occasions are mapped in an association period. In some embodiments, the mapping relationship between the first signals (or the first signal indexes) and the WUS transmission occasions are configured in an association period or on a basis of an association period.

In some embodiments, the association period starts from frame 0. For example, the begin of the association period satisfies that the SFN (system frame number) equals 0. In some embodiments, the association period is determined by at least one of the WUS configuration period, the cycle of the first signal, and/or the cycle of the WUS occasion, a pre-determined value, or a high layer parameter. In some embodiments, the association period is multiple of the WUS configuration period. In some other embodiments, the association period is multiple of the cycle of the first signal.

In some embodiments, the length of the association period is not less than that of the WUS configuration period.

In some embodiments, within an association period, all first signals (or first signal indexes) are mapped to the WUS transmission occasions for at least one time. In some embodiments, within an association period, each transmitted first signal mapped to at least one WUS transmission occasion.

In some embodiments, within an association period, the WUS transmission occasions are associated with the transmitted first signals with indexes starting from index 0.

In some embodiments, the length of the association period is equal to that of the WUS configuration period, and one WUS transmission occasion associates with one or more consecutive first signals indexes in an association period. For example, there are four WUS transmission occasions in one WUS configuration period, there are four transmitted first signals, with indexes 0, 1, 2, and 3, respectively, and each WUS transmission occasion associates with two transmitted first signals (see FIG. 5) .

In some embodiments, the length of the association period is multiple of that of the WUS configuration period, and one WUS transmission occasion associates with one or more consecutive first signals indexes in an association period. For example, the length of the association period is twice of that of the WUS configuration period, there are two WUS transmission occasions in one WUS configuration period, there are four transmitted first signals, with indexes 0, 1, 2, and 3, respectively, and each WUS transmission occasion associates with one transmitted first signal (see FIG. 6) .

In some embodiments, in an association period, the number of times that all the transmitted first signal indexes associated with the WUS transmission occasions is the same. In some embodiments, in an association period, the WUS transmission occasions not corresponding to any transmitted first signals may not be used for WUS transmissions or invalid. For example, the length of the association period is three times of that of the WUS configuration period, there are 3 WUS transmission occasion in one WUS configuration period, there are 2 transmitted first signals, with indexes 0, 1, respectively, and each WUS transmission occasion associates with 2 transmitted first signals (see FIG. 7) .

In some embodiments, the UE transmits the WUS according to the spatial relation with a reference to a reference signal.

In some embodiments, the spatial relation is used for determining UL (uplink) TX (transmitting) spatial filter.

In some embodiments, the reference signal can be configured by RRC or SIB.

In some embodiments, the reference signal comprises at least one of a first signal, a second signal, a CSI-RS (channel state information reference signal) , a TRS (tracking reference signal) , an SRS (sounding reference signal) , a DRS (discover reference signal) , a PSS, an SSS, a simplified SSB, or a SS/PBCH (synchronization signal/physical broadcast channel) block. In some embodiments, the reference signal comprises one or more reference signal resources. In some embodiments, the UE transmits the WUS according to the spatial relation with a reference to a reference signal resource (e.g., the resource of the reference signal) .

In some embodiments, the reference signal of the WUS is transmitted in the same cell as the WUS. In some other embodiments, the reference signal of the WUS is the signal transmitted on the anchor cell or PCell or non-anchor cell (e.g., a cell different from the first cell) .

In some examples, the reference signal is a CSI-RS resource in an NZP-CSI-RS-ResourceSet configured with the higher layer parameter repetition. In some other examples, the reference signal is a CSI-RS resource in an NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info. In some other examples, the reference signal is an SRS resource with the higher layer parameter usage set to 'beamManagement'.

In some embodiments, the WUS is transmitted with multiple beams. In some embodiments, each WUS transmission occasion in a WUS occasion associates with a beam. In some embodiments, the same WUS information are repeated in all transmitted beams of a WUS occasion.

In some embodiments, one or more WUS transmission occasions in a WUS occasion are selected to transmit WUS information. In some embodiments, the WUS transmission occasion selection is associated with at least one of: an associated first signal, the information carried by the WUS, the UE ID, and/or the group ID. In some examples, the first signal comprises at least one of: a DRS, a simplified SSB, a PSS, an SSS, a PRACH occasion, an SRS, a CSI-RS, a TRS, and/or an SSB.

In some embodiments, a WUS transmission occasion is valid if it does not overlap with a valid PRACH occasion.

In some embodiments, for TDD (Time Division Duplex) , a WUS transmission occasion is valid if the WUS transmission occasion is within UL symbols. In some embodiments, a WUS transmission occasion is valid if the WUS transmission occasion is not overlaps with a DL symbol indicated by the tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated. In some embodiments, a WUS transmission occasion is valid if the WUS transmission occasion is not overlapped with a symbol of an SS/PBCH block or DRS.

In some embodiments, a WUS transmission occasion is valid if the WUS transmission occasion starts at least G symbols after a last first signal symbol (e.g., the last symbol in which the first signal is transmitted) , where G is pre-determined. In some examples, the value of G is determined by the SCS of the WUS. The first signal symbol is the symbol where the first signal is transmitted.

In some embodiments, a WUS transmission occasion is invalid if it overlaps with at least one of the following: valid PRACH occasion; SSB/DRS; DL symbol indicated by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated.

WUS transmission occasion selection

In some embodiments, the UE transmits the WUS on the WUS transmission occasion associated with the selected first signals.

In some embodiments, the UE detects the transmitted first signals and selects one or more first signals according to the measurement results of the first signal and a threshold.

In some embodiments, the measurement result is the RSRP (Reference signal received power) of the first signal.

In some embodiments, the threshold is configured by RRC or SIB.

In some embodiments, when the measurement results of all transmitted first signals are smaller than the threshold, the UE selects one of the first signals from all transmitted first signals as the selected first signal. For example, the UE selects a first signal randomly. In some embodiments, when the measurement result of a first signal is larger than or equal to the threshold, the UE selects this first signal as the candidate first signal. In some embodiments, when there is more than one candidate first signal, the UE selects one of the candidate first signal as the selected first signal. For example, the UE selects the first signal from the candidate first signals randomly. In some embodiments, when there is more than one candidate first signals, the UE selects the first signal with the largest measurement result (e.g., the largest RSRP) . In some embodiments, when there is more than one candidate first signals, all the candidate first signals may be selected.

In some embodiments, in response to one selected first signal associates with more than one WUS transmission occasions, the UE selects one of the WUS transmission occasion associated with the selected first signal and transmits the WUS on the selected WUS transmission occasion. In some other embodiments, in response to one selected first signal associates with more than one WUS transmission occasions, the UE selects the first WUS transmission occasion associated with the selected first signal and transmits the WUS on the selected WUS transmission occasion. In some embodiments, the UE transmits the WUS on all WUS transmission occasions associated with the selected first signal.

first cell identification

In some embodiments, the UE transmits an uplink wake-up signal (WUS) to a gNB, in which the WUS carries at least one of: the information for triggering SSB transmission on a first cell or the information for triggering SIB1 transmission on a first cell.

In some embodiments, an identifier of the first cell is associated with at least one of: a PCI (physical cell identity) , a cell identity, or a serving cell index. When the identifier of the first cell is configured or set to ‘true’ , the cell corresponds to at least one of: a PCI, a cell identity, or a serving cell index is a first cell. In some embodiments, the identifier is configured by at least one of: RRC, MIB (Master Information Block) , SIB1, core network, NAS (Non-Access Stratum) .

In some embodiments, the first cell satisfies at least one of: the first cell is a network energy saving (NES) cell, the first cell is an SSB-less SCell, the first cell is a SIB-less SCell, the first cell supports the WUS transmission, no SSB or only the on-demand SSB is able to be transmitted on the first cell, and/or no SSB or only the on-demand SIB is able to be transmitted on the first cell.

In some embodiments, the UE identifies the first cell based on the PCI. In some embodiments, the UE obtains the PCI of the first cell according to the PSS (primary synchronization signal) and SSS (secondary synchronization signal) transmitted on the first cell.

In some embodiments, the UE identifies the first cell based on the signals transmitted on the cell. In some embodiments, when the UE detects at least one of: a PSS (primary reference signal) , a SSS (secondary reference signal) , a TRS, and/or a second signal at a cell but no SSB is detected on the cell, the UE may consider the cell as the first cell. In some embodiment, second signal comprises at least one of DRS (discovery reference signal) , SSS (secondary reference signal) , or PSS (primary reference signal) .

In some embodiments, an indication, identifier, or flag is carried on at least one of: the MIB transmitted on the first cell, the MIB transmitted on an anchor cell, and/or the SIB1 transmitted on an anchor cell. In some embodiments, the anchor cell is a cell where the UE assumes the SSB, system information and paging are transmitted.

WUS configuration

In some embodiments, the WUS related information is configured by at least one of the following: the SIB, RRC message, core network, and/or NAS (Non-Access Stratum) . In some embodiments, the WUS related information comprises at least one of: the resource for the WUS occasion and/or the WUS configuration information.

In some embodiments, the resource for the WUS occasion is the same in one or more cells, or one or more tracking areas, or one or more RAN notification areas.

In some embodiments, the WUS is associated with at least one of: a PCI, a cell ID, a serving cell index, a UE ID, and/or a group ID.

In some embodiments, the WUS comprises the indication to indicate the SSB and/or SIB transmission.

In some embodiments, the gNB transmits feedback to the UE to indicate whether the SSB and/or SIB may be transmitted on the first cell.

In some embodiments, the UE detects the SSB and/or SIB after transmitting the WUS. In some embodiments, the UE detects the SSB and/or SIB from S symbols/slots after the WUS transmission, wherein the S is a positive number determined by at least one of: the SCS (Subcarrier Spacing) of the first cell (e.g., the initial BWP (bandwidth part) of the first cell or the current active BWP of the first cell) , the SCS of the BWP where WUS transmitted, a pre-defined value, and/or RRC parameters. In some embodiments, the UE re-transmits the WUS if the SSB and/or SIB are not detected after WUS transmitted. In some embodiments, the WUS can be transmitted for a maximum of N times, wherein N is a pre-defined integer or configured by RRC parameters.

In some embodiments, in response to the WUS, at least one of the SSB or SIB may be transmitted.

In some examples, the SSB and/or SIB may be transmitted N times, wherein the N is determined by at least one of: a fixed value (e.g., N=1 or N=2) or configured by a high layer parameter.

In some examples, the SSB and/or SIB may be transmitted periodically from the next SSB burst occasion.

In some examples, the SSB and/or SIB may be transmitted from X symbols/slots after the WUS transmission, wherein the X is determined by at least one of: the SCS of the first cell (e.g., the initial BWP of the first cell or the current active BWP of the first cell) , the SCS of the BWP where WUS transmitted, a pre-defined value, and/or RRC parameters.

In some examples, when more than one SSB and/or SIB is transmitted, the first slot/symbol of the (i+1) -th SSB or SIB starts at a time after the end of the i-th SSB or SIB with an offset, wherein i≥1, and the offset is configured by an RRC message or a pre-determined value.

In some other examples, the SSB and/or SIB may be transmitted for a period of time.

In some embodiments, when the SSB and/or SIB is transmitted on the first cell, at least one of the CSI-RS transmission, the TRS transmission, and/or the second signal transmission may stop (e.g., in the first cell) . In some embodiments, when the SSB and/or SIB is transmitted on the first cell, at least one of the CSI-RS transmission, the TRS transmission, and/or the second signal transmission may stop (e.g., in the first cell) during the SSB and/or SIB transmission.

In some embodiments, in response to the WUS, one or more SSB bursts may be transmitted on the first cell. When the SSB resource (e.g., the resource for the SSB bursts) is overlapped with at least one of: the second signal resource and/or TRS resource, the SSB may be transmitted, and the signal (e.g., the signal on the DRS resource or TRS resource) overlapped with the SSB may be dropped.

A second signal

In some embodiments, the UE detects a second signal.

In some embodiments, the UE detects the second signal before the WUS transmission.

In some embodiments, the UE detects the second signal periodically.

In some embodiments, second signal comprises at least one of simplified SSB, DRS, SSS(secondary reference signal) , and/or PSS (primary reference signal) .

In some embodiments, the simplified SSB comprises at least one of a DRS, a PSS, a SSS, a SSB with reduced transmission burst.

In some embodiments, the second signal are transmitted periodically. In some embodiments, the cycle of the second signal is associated with at least one of: one or more high layer parameters, the cycle of the WUS occasion, and/or the cycle of SSB. In some examples, the cycle of the second signal is configured by high layer parameters, an RRC message, or an SIB. In some examples, the cycle of the second signal is equal to N times of the SSB transmission cycle, wherein N≥1. In some other examples, the cycle of the second signal is equal to M times of the WUS occasion cycle, wherein M≥1.

In some embodiments, the second signal are transmitted in a first duration.

In some embodiments, the first duration is a transmission window.

In some embodiments, one or more second signal bursts can be transmitted in the first duration. In some examples, the second signal burst within the first duration can be transmitted with a short cycle. In some other examples, the first slot of the (i+1) -th second signal burst locates at the m_i-th slot after the end of the i-th second signal burst, wherein i≥1. The value of m_i can be configured by high layer parameters or an RRC message.

In some embodiments, the first duration is configured as a periodic duration. In some embodiments, the cycle of the first duration is associated with at least one of: one or more high layer parameters, the cycle of the WUS occasion, and/or the cycle of the SSB.

In some embodiments, at least one of the start point, the end point, and/or the duration of the first duration is determined by at least one of high layer parameters, an offset, and/or the start of the WUS occasion. For example, the end point of the first duration is determined by an offset from the end of the first duration to the start of the WUS occasion.

In the paragraphs below, details will be described along with some examples, but the present disclosure is not limited to the example below.

FIG. 8 relates to a diagram of a wireless communication terminal 30 according to an embodiment of the present disclosure. The wireless communication terminal 30 may be a tag, a mobile phone, a laptop, a tablet computer, an electronic book or a portable computer system and is not limited herein. The wireless communication terminal 30 may be used to implement the UE described in this disclosure. The wireless communication terminal 30 may include a processor 300 such as a microprocessor or Application Specific Integrated Circuit (ASIC) , a storage unit 310 and a communication unit 320. The storage unit 310 may be any data storage device that stores a program code 312, which is accessed and executed by the processor 300. Embodiments of the storage code 312 include but are not limited to a subscriber identity module (SIM) , read-only memory (ROM) , flash memory, random-access memory (RAM) , hard-disk, and optical data storage device. The communication unit 320 may a transceiver and is used to transmit and receive signals (e.g., messages or packets) according to processing results of the processor 300. In an embodiment, the communication unit 320 transmits and receives the signals via at least one antenna 322 or via wiring.

In an embodiment, the storage unit 310 and the program code 312 may be omitted and the processor 300 may include a storage unit with stored program code.

The processor 300 may implement any one of the steps in exemplified embodiments on the wireless communication terminal 30, e.g., by executing the program code 312.

The communication unit 320 may be a transceiver. The communication unit 320 may as an alternative or in addition be combining a transmitting unit and a receiving unit configured to transmit and to receive, respectively, signals to and from a wireless communication node.

In some embodiments, the wireless communication terminal 30 may be used to perform the operations of the UE described in this disclosure. In some embodiments, the processor 300 and the communication unit 320 collaboratively perform the operations described in this disclosure. For example, the processor 300 performs operations and transmit or receive signals, message, and/or information through the communication unit 320.

FIG. 9 relates to a diagram of a wireless communication node 40 according to an embodiment of the present disclosure. The wireless communication node 40 may be a satellite, a base station (BS) , a gNB, a network entity, a Domain Name System (DNS) server, a Mobility Management Entity (MME) , Serving Gateway (S-GW) , Packet Data Network (PDN) Gateway (P-GW) , a radio access network (RAN) , a next generation RAN (NG-RAN) , a data network, a core network, a communication node in the core network, or a Radio Network Controller (RNC) , and is not limited herein. In addition, the wireless communication node 40 may include (perform) at least one network function such as an access and mobility management function (AMF) , a session management function (SMF) , a user place function (UPF) , a policy control function (PCF) , an application function (AF) , etc. The wireless communication node 40 may be used to implement the gNB described in this disclosure. The wireless communication node 40 may include a processor 400 such as a microprocessor or ASIC, a storage unit 410 and a communication unit 420. The storage unit 410 may be any data storage device that stores a program code 412, which is accessed and executed by the processor 400. Examples of the storage unit 412 include but are not limited to a SIM, ROM, flash memory, RAM, hard-disk, and optical data storage device. The communication unit 420 may be a transceiver and is used to transmit and receive signals (e.g., messages or packets) according to processing results of the processor 400. In an embodiment, the communication unit 420 transmits and receives the signals via at least one antenna 422 or via wiring.

In an embodiment, the storage unit 410 and the program code 412 may be omitted. The processor 400 may include a storage unit with stored program code.

The processor 400 may implement any steps described in exemplified embodiments on the wireless communication node 40, e.g., via executing the program code 412.

The communication unit 420 may be a transceiver. The communication unit 420 may as an alternative or in addition be combining a transmitting unit and a receiving unit configured to transmit and to receive, respectively, signals, messages, or information to and from a wireless communication node or a wireless communication terminal.

In some embodiments, the wireless communication node 40 may be used to perform the operations of the gNB described in this disclosure. In some embodiments, the processor 400 and the communication unit 420 collaboratively perform the operations described in this disclosure. For example, the processor 400 performs operations and transmit or receive signals through the communication unit 420.

A wireless communication method is also provided according to an embodiment of the present disclosure. In an embodiment, the wireless communication method may be performed by using a wireless communication terminal (e.g., a UE) . In an embodiment, the wireless communication terminal may be implemented by using the wireless communication terminal 30 described in this disclosure, but is not limited thereto.

Referring to FIG. 10, in an embodiment, the wireless communication method includes: transmitting, by a wireless communication terminal to a wireless communication node, a wake-up signal, WUS, wherein the WUS carries at least one of: information for triggering a Synchronization Signal Block, SSB, transmission on a first cell, information for triggering a System Information Block, SIB, transmission on a first cell, information for triggering a first cell on or off, or information for triggering a state transition on a first cell.

Details in this regard can be ascertained with reference to the paragraphs above, and will not be repeated herein.

Another wireless communication method is also provided according to an embodiment of the present disclosure. In an embodiment, the wireless communication method may be performed by using a wireless communication node (e.g., a gNB) . In an embodiment, the wireless communication node may be implemented by using the wireless communication node 40 described in this disclosure, but is not limited thereto.

Referring to FIG. 11, in an embodiment, the wireless communication method includes receiving, by a wireless communication node from a wireless communication terminal, a wake-up signal, WUS, wherein the WUS carries at least one of: information for triggering a Synchronization Signal Block, SSB, transmission on a first cell, information for triggering a System Information Block, SIB, transmission on a first cell, information for triggering a first cell on or off, or information for triggering a state transition on a first cell.

In some embodiments, the wireless communication terminal used in the present disclosure may indicate the UE described above.

In some embodiments, the wireless communication node used in the present disclosure may indicate BS or gNB described above.

While various embodiments of the present disclosure have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. Likewise, the various diagrams may depict an example architectural or configuration, which are provided to enable persons of ordinary skill in the art to understand exemplary features and functions of the present disclosure. Such persons would understand, however, that the present disclosure is not restricted to the illustrated example architectures or configurations, but can be implemented using a variety of alternative architectures and configurations. Additionally, as would be understood by persons of ordinary skill in the art, one or more features of one embodiment can be combined with one or more features of another embodiment described herein. Thus, the breadth and scope of the present disclosure should not be limited by any one of the above-described exemplary embodiments.

It is understood that, in the present disclosure, the term “and/or” or symbol “/” may include any and all combinations of one or more of the associated listed items. For example, A and/or B and/or C includes any and all combinations of one or more of A, B, and C, including A, B, C, A and B, A and C, B and C, and a combination of A and B and C. Likewise, A/B/C includes any and all combinations of one or more of A, B, and C, including A, B, C, A and B, A and C, B and C, and a combination of A and B and C.

It is also understood that any reference to an element herein using a designation such as "first, " "second, " and so forth does not generally limit the quantity or order of those elements. Rather, these designations can be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements can be employed, or that the first element must precede the second element in some manner.

Additionally, a person having ordinary skill in the art would understand that information and signals can be represented using any one of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits and symbols, for example, which may be referenced in the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

A skilled person would further appreciate that any one of the various illustrative logical blocks, units, processors, means, circuits, methods and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., a digital implementation, an analog implementation, or a combination of the two) , firmware, various forms of program or design code incorporating instructions (which can be referred to herein, for convenience, as "software" or a "software unit” ) , or any combination of these techniques.

To clearly illustrate this interchangeability of hardware, firmware and software, various illustrative components, blocks, units, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware or software, or a combination of these techniques, depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in various ways for each particular application, but such implementation decisions do not cause a departure from the scope of the present disclosure. In accordance with various embodiments, a processor, device, component, circuit, structure, machine, unit, etc. can be configured to perform one or more of the functions described herein. The term “configured to” or “configured for” as used herein with respect to a specified operation or function refers to a processor, device, component, circuit, structure, machine, unit, etc. that is physically constructed, programmed and/or arranged to perform the specified operation or function.

Furthermore, a skilled person would understand that various illustrative logical blocks, units, devices, components and circuits described herein can be implemented within or performed by an integrated circuit (IC) that can include a general-purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, or any combination thereof. The logical blocks, units, and circuits can further include antennas and/or transceivers to communicate with various components within the network or within the device. A general-purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine. A processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration to perform the functions described herein. If implemented in software, the functions can be stored as one or more instructions or code on a computer-readable medium. Thus, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium.

Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program or code from one place to another. A storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.

In this document, the term "unit" as used herein, refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, for purpose of discussion, the various units are described as discrete units; however, as would be apparent to one of ordinary skill in the art, two or more units may be combined to form a single unit that performs the associated functions according to embodiments of the present disclosure.

Additionally, memory or other storage, as well as communication components, may be employed in embodiments of the present disclosure. It will be appreciated that, for clarity purposes, the above description has described embodiments of the present disclosure with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements or domains may be used without detracting from the present disclosure. For example, functionality illustrated to be performed by separate processing logic elements, or controllers, may be performed by the same processing logic element, or controller. Hence, references to specific functional units are only references to a suitable means for providing the described functionality, rather than indicative of a strict logical or physical structure or organization.

Various modifications to the implementations described in this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other implementations without departing from the scope of the claims. Thus, the disclosure is not intended to be limited to the implementations shown herein, but is to be accorded the widest scope consistent with the novel features and principles disclosed herein, as recited in the claims below.

Claims

A wireless communication method comprising:

transmitting, by a wireless communication terminal to a wireless communication node, a wake-up signal, WUS, wherein the WUS carries at least one of: information for triggering a Synchronization Signal Block, SSB, transmission on a first cell, information for triggering a System Information Block, SIB, transmission on a first cell, information for triggering a first cell on or off, or information for triggering a state transition on a first cell.
The wireless communication method of claim 1, wherein the WUS is transmitted on one or more WUS transmission occasions, and the WUS transmission occasion satisfies at least one of:

the WUS transmission occasion associates with a WUS configuration period, and the WUS configuration period comprises the one or more WUS transmission occasions;

one WUS transmission occasion associates N transmitted first signals, and N is a positive number;

a K-th WUS transmission occasion in a WUS configuration period is associated with a K-th transmitted first signal, and K is a positive integer; or

a [x*S+K] -th WUS transmission occasion in a WUS configuration period associates with a K-th transmitted first signal, x is a non-negative integer, K is a positive integer not larger than S, and S is the number of transmitted first signal.
The wireless communication method of claim 2, wherein in response to N>1, the transmitted first signal mapped to the WUS transmission occasion in at least one of:

increasing order of frequency resource indexes for frequency multiplexed WUS transmission occasions; or

increasing order of time resource indexes for time multiplexed WUS transmission occasions.
The wireless communication method of claim 2 or 3, wherein the first signal comprises at least one of:

a second signal;

a discovery reference signal, DRS;

a physical random access channel, PRACH occasion;

a Sounding Reference Signal, SRS;

a channel status information reference signal, CSI-RS;

a Tracking Reference Signal, TRS;

a synchronization signal block, SSB; or

an SSB transmitted on a target cell.
The wireless communication method of any of claims 2 to 4, wherein the first signal to WUS transmission occasions is mapped in an association period, and the association period is determined based on at least one of: a WUS configuration period, a cycle of the one or more first signals, a cycle of the one or more WUS transmission occasions, a pre-determined value, or a high layer parameter.
The wireless communication method of any of claims 1 to 5, wherein a mapping between one or more WUS transmission occasions and one or more transmitted first signals satisfies at least one of:

each transmitted first signal is mapped to at least one WUS transmission occasion within an association period;

one WUS transmission occasion associates with one or more consecutive transmitted first signals within an association period;

a number of times that the transmitted first signals mapped to the WUS transmission occasions is the same; or

the WUS transmission occasion that not mapping to the transmitted first signals is invalid.
The wireless communication method of any of claims 1 to 6, wherein the WUS is transmitted according to a spatial relation with a reference signal, wherein the reference signal comprises at least one of:

a first signal;

a CSI-RS;

a TRS;

an SRS;

a second signal; or

a synchronization signal/physical broadcast channel, SS/PBCH, block.
The wireless communication method of any of claims 1 to 7, wherein a WUS transmission occasion is valid in response to at least one of:

the WUS transmission occasion does not overlap with a valid PRACH occasion;

the WUS transmission occasion is not overlapped with a DL symbol;

the WUS transmission occasion is not overlapped with a symbol of an SS/PBCH block; or

the WUS transmission occasion starts at least G symbols after a last symbol for a transmission of the first signal, wherein G is a positive integer.
The wireless communication method of any of claims 1 to 8, wherein the wireless communication terminal performs at least one of:

detecting first signals and selecting a first signal among the first signals according to measurement results of the first signals; or

transmitting the WUS on one or more WUS transmission occasions associated with the selected first signal.
The wireless communication method of any of claims 1 to 9, wherein the wireless communication terminal identifies a cell as a first cell based on at least one of:

an identifier associated with the cell;

a physical cell identity, PCI, of the cell; or

one or more signals transmitted on the cell.
The wireless communication method of any of claims 1 to 10, wherein an identifier associated with a cell is associated with at least one of: a physical cell identity, PCI, a cell identity, or a serving cell index.
The wireless communication method of any of claims 1 to 11, wherein the identifier of the cell is configured by at least one of:

a Radio Resource Control, RRC, message;

a Master Information Block, MIB;

a System Information Block, SIB;

a core network; or

a Non-Access Stratum, NAS.
The wireless communication method of any of claims 1 to 12, wherein the first cell satisfies at least one of:

the first cell is a network energy saving, NES, cell;

the first cell is an SSB-less secondary cell, SCell;

the first cell is an SIB-less cell;

the first cell supports a WUS transmission;

only on-demand SSB is transmitted on the first cell; or

only on-demand SIB is transmitted on the first cell.
The wireless communication method of any of claims 1 to 13, wherein the WUS is associated with at least one of: a PCI, a cell identity, a serving cell index, a user equipment, UE, ID, or a group ID.
The wireless communication method of any of claims 1 to 14, wherein the wireless communication terminal detects a second signal on the first cell.
The wireless communication method of any of claims 3 to 15, wherein the second signal satisfies at least one of:

the second signal comprises at least one of: a simplified SSB, a discovery reference signal, DRS, a secondary reference signal, SSS or a primary reference signal, PSS;

the second signal is transmitted periodically; or

the second signal is transmitted in a first duration.
A wireless communication method comprising:

receiving, by a wireless communication node from a wireless communication terminal, a wake-up signal, WUS, wherein the WUS carries at least one of: information for triggering a Synchronization Signal Block, SSB, transmission on a first cell, information for triggering a System Information Block, SIB, transmission on a first cell, information for triggering a first cell on or off, or information for triggering a state transition on a first cell.
The wireless communication method of claim 17, wherein the WUS is transmitted on one or more WUS transmission occasions, and the WUS transmission occasion satisfies at least one of:

the WUS transmission occasion associates with a WUS configuration period, and the WUS configuration period comprises the one or more WUS transmission occasions;

one WUS transmission occasion associates N transmitted first signals, and N is a positive number;

a K-th WUS transmission occasion in a WUS configuration period is associated with a K-th transmitted first signal, and K is a positive integer; or

a [x*S+K] -th WUS transmission occasion in a WUS configuration period associates with a K-th transmitted first signal, x is a non-negative integer, K is a positive integer not larger than S, and S is the number of transmitted first signal.
The wireless communication method of claim 18, wherein in response to N>1, the transmitted first signal mapped to the WUS transmission occasion in at least one of:

increasing order of frequency resource indexes for frequency multiplexed WUS transmission occasions; or

increasing order of time resource indexes for time multiplexed WUS transmission occasions.
The wireless communication method of claim 18 or 19, wherein the first signal comprises at least one of:

a second signal;

a discovery reference signal, DRS;

a physical random access channel, PRACH occasion;

a Sounding Reference Signal, SRS;

a channel status information reference signal, CSI-RS;

a Tracking Reference Signal, TRS;

a synchronization signal block, SSB; or

an SSB transmitted on a target cell.
The wireless communication method of any of claims 18 to 20, wherein the first signal to WUS transmission occasions is mapped in an association period, and the association period is determined based on at least one of: a WUS configuration period, a cycle of the one or more first signals, a cycle of the one or more WUS transmission occasions, a pre-determined value, or a high layer parameter.
The wireless communication method of any of claims 17 to 21, wherein a mapping between one or more WUS transmission occasions and one or more transmitted first signals satisfies at least one of:

each transmitted first signal is mapped to at least one WUS transmission occasion within an association period;

one WUS transmission occasion associates with one or more consecutive transmitted first signals within an association period;

a number of times that the transmitted first signals mapped to the WUS transmission occasions is the same; or

the WUS transmission occasion that not mapping to the transmitted first signals is invalid.
The wireless communication method of any of claims 17 to 22, wherein the WUS is transmitted according to a spatial relation with a reference signal, wherein the reference signal comprises at least one of:

a first signal;

a CSI-RS;

a TRS;

an SRS;

a second signal; or

a synchronization signal/physical broadcast channel, SS/PBCH, block.
The wireless communication method of any of claims 17 to 23, wherein a WUS transmission occasion is valid in response to at least one of:

the WUS transmission occasion does not overlap with a valid PRACH occasion;

the WUS transmission occasion is not overlapped with a DL symbol;

the WUS transmission occasion is not overlapped with a symbol of an SS/PBCH block; or

the WUS transmission occasion starts at least G symbols after a last symbol for a transmission of the first signal, wherein G is a positive integer.
The wireless communication method of any of claims 17 to 24, wherein a cell is identified as a first cell based on at least one of:

an identifier associated with the cell;

a physical cell identity, PCI, of the cell; or

one or more signals transmitted on the cell.
The wireless communication method of any of claims 17 to 25, wherein an identifier associated with a cell is associated with at least one of: a physical cell identity, PCI, a cell identity, or a serving cell index.
The wireless communication method of any of claims 17 to 26, wherein the identifier of the cell is configured by at least one of:

a Radio Resource Control, RRC, message;

a Master Information Block, MIB;

a System Information Block, SIB;

a core network; or

a Non-Access Stratum, NAS.
The wireless communication method of any of claims 17 to 27, wherein the first cell satisfies at least one of:

the first cell is a network energy saving, NES, cell;

the first cell is an SSB-less secondary cell, SCell;

the first cell is an SIB-less cell;

the first cell supports a WUS transmission;

only on-demand SSB is transmitted on the first cell; or

only on-demand SIB is transmitted on the first cell.
The wireless communication method of any of claims 17 to 28, wherein the WUS is associated with at least one of: a PCI, a cell identity, a serving cell index, a user equipment, UE, ID, or a group ID.
The wireless communication method of any of claims 17 to 29, wherein the wireless communication node transmits a second signal on the first cell.
The wireless communication method of any of claims 19 to 30, wherein the second signal satisfies at least one of:

the second signal comprises at least one of: a simplified SSB, a discovery reference signal, DRS, a secondary reference signal, SSS or a primary reference signal, PSS;

the second signal is transmitted periodically; or

the second signal is transmitted in a first duration.
A wireless communication terminal, comprising:

a communication unit; and

a processor configured to: transmit, via the communication unit to a wireless communication node, a wake-up signal, WUS, wherein the WUS carries at least one of: information for triggering a Synchronization Signal Block, SSB, transmission on a first cell, information for triggering a System Information Block, SIB, transmission on a first cell, information for triggering a first cell on or off, or information for triggering a state transition on a first cell.
The wireless communication terminal of claim 32, wherein the processor is further configured to perform a wireless communication method of any of claims 2 to 16.
A wireless communication node, comprising:

a communication unit; and

a processor configured to: receive, via the communication unit from a wireless communication terminal, a wake-up signal, WUS, wherein the WUS carries at least one of: information for triggering a Synchronization Signal Block, SSB, transmission on a first cell, information for triggering a System Information Block, SIB, transmission on a first cell, information for triggering a first cell on or off, or information for triggering a state transition on a first cell.
The wireless communication node of claim 35, wherein the processor is further configured to perform a wireless communication method of any of claims 18 to 31.
A computer program product comprising a computer-readable program medium code stored thereupon, the code, when executed by a processor, causing the processor to implement a wireless communication method recited in any one of claims 1 to 31.