Method performed by user equipment or base station, user equipment and base station

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by user equipment (UE) in a communication system is provided. The method comprises: receiving first configuration information for a first signal and second configuration information for a second signal from a base station; in case of receiving a third signal from the base station and / or determining that a first condition is satisfied, performing a first operation based on at least one of the first configuration information and the second configuration information, wherein the first operation includes at least one of monitoring the first signal and radio resource management RRM measurement based on the second signal, wherein the first signal includes a low-power signal for waking up a UE, and the second signal includes a signal for synchronization and / or RRM measurement.

Description

METHOD PERFORMED BY USER EQUIPMENT OR BASE STATION, USER EQUIPMENT AND BASE STATION

[0001] The present disclosure relates to the field of wireless communication, and more particularly, to low power signals for communication.

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

[0003] At the beginning of the development of 5G mobile communication technologies, in order to support services and to satisfy performance requirements in connection with enhanced Mobile BroadBand (eMBB), Ultra Reliable Low Latency Communications (URLLC), and massive Machine-Type Communications (mMTC), there has been ongoing standardization regarding beamforming and massive MIMO for mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, supporting numerologies (for example, operating multiple subcarrier spacings) for efficiently utilizing mmWave resources and dynamic operation of slot formats, initial access technologies for supporting multi-beam transmission and broadbands, definition and operation of BWP (BandWidth Part), new channel coding methods such as a LDPC (Low Density Parity Check) code for large amount of data transmission and a polar code for highly reliable transmission of control information, L2 pre-processing, and network slicing for providing a dedicated network specialized to a specific service.

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

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

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

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

[0008] In some use cases (such as Internet of Things devices and / or wearable devices) that require more stringent low power consumption of UE, in order to further extend the battery life of UE, the wireless communication system can use a low power wake-up signal (LPWUS) to wake up the UE to perform receiving of signals and / or channels. Therefore, it is necessary to design the method of monitoring LPWUS. Optionally, a low-power synchronization signal can be configured for downlink synchronization and / or RRM (Radio Resource Management) measurement of LPWUS signals.

[0009] According to at least one embodiment of the present disclosure, a method performed by user equipment (UE) in a communication system is provided. The method comprises: receiving first configuration information for a first signal and second configuration information for a second signal from a base station; in case of receiving a third signal from the base station and / or determining that a first condition is satisfied, performing a first operation based on at least one of the first configuration information and the second configuration information, wherein the first operation includes at least one of monitoring the first signal and radio resource management RRM measurement based on the second signal, wherein the first signal includes a low-power signal for waking up a UE, and the second signal includes a signal for synchronization and / or RRM measurement.

[0010] In an implementation, the first configuration information and the second configuration information may be configured at the same time, or may be configured separately. For example, the first configuration information and the second configuration information can be configured through one message or separately through different messages.

[0011] In an implementation, the third signal includes indication information for indicating activating the first operation, which is for at least one of:

[0012] indicating activating the first operation,

[0013] indicating the UE to perform periodic monitoring or consecutive monitoring based on the first signal,

[0014] indicating the UE to perform RRM measurement based on the second signal.

[0015] In an implementation, the first operation further comprises at least one of:

[0016] not monitoring physical downlink control channel (PDCCH) search space or downlink control information DCI with cyclic redundancy prefix CRC scrambled by power-saving radio network temporary identifier (PS_RNTI),

[0017] not monitoring paging occasion or paging early indication,

[0018] no longer performing RRM measurement based on synchronization signal and physical broadcast channel block SSB,

[0019] starting a receiving module for wake-up signal;

[0020] a main radio entering a sleep state;

[0021] transmitting a first acknowledgement signal for the third signal within a second time after receiving the third signal and / or before the main radio enters a sleep state;

[0022] the UE not expecting to monitor PDCCH search space set and / or paging occasions;

[0023] the UE not expecting to monitor DCI with CRC scrambled by PS_RNTI, in RRC CONNECTED state;

[0024] the UE not expecting to monitor the paging early indication, in the RRC INACTIVE state.

[0025] In an implementation, the third signal comprises a DCI message, and the DCI message further comprises at least one of:

[0026] identification information for indicating a DCI format,

[0027] feedback time information, to indicate time information from receiving the third signal to transmitting the first acknowledgement signal for the third signal by the UE,

[0028] bandwidth part BWP related information for the first signal and / or the second signal,

[0029] time domain resource allocation information of the first acknowledgement signal,

[0030] frequency domain resource allocation information of the first acknowledgement signal.

[0031] In an implementation, the method further comprises: transmitting a fourth signal to the base station, wherein the fourth signal is for requesting the base station to transmit the third signal.

[0032] In an implementation, the first acknowledgement signal is to indicate at least one of the following to the base station:

[0033] the UE has activated the first operation,

[0034] the UE has deactivated the main radio,

[0035] the UE no longer monitors the PDCCH search space or the DCI with the CRC scrambled by PS_RNTI,

[0036] the UE no longer monitors paging occasion or paging early indication,

[0037] the UE no longer performs RRM measurement based on SSB.

[0038] In an implementation, the UE activates or deactivates the first operation after a first time unit from transmitting the first acknowledgement signal, wherein the first time unit is related to SCS of the first acknowledgement signal and / or switch time of BWP.

[0039] In an implementation, the first condition includes at least one of:

[0040] a change or difference of RSRP of SSB within a third time is less than or equal to a first threshold;

[0041] a change or difference of RSRQ of SSB within a fourth time is less than or equal to a second threshold;

[0042] RSRP of SSB is greater than or equal to a third threshold;

[0043] RSRQ of SSB is greater than or equal to a fourth threshold;

[0044] a value of a first timer is decremented to 0, wherein the first timer is started when the UE detects one or more DCI formats at a PDCCH monitoring occasion, and the value of the timer is decremented per the time unit; if the UE detects one or more DCI formats again before the first timer decrements to 0, the UE resets the first timer;

[0045] the UE receives the third signal.

[0046] In an implementation, when the third signal is received from the base station and / or it is determined that the first condition is satisfied, the method further comprises:

[0047] performing a second operation based on the first signal, the second operation including at least one of:

[0048] turning on the main radio,

[0049] in the RRC CONNECTED state, the UE monitors PDCCH search space or DCI with CRC scrambled by PS_RNTI after a fifth time,

[0050] in the RRC INACTIVE or IDLE state, the UE monitors a paging early indication or a paging occasion after a sixth time,

[0051] in the RRC INACTIVE or IDLE state, the UE enters the RRC CONNECTED state after a seventh time,

[0052] the UE performs RRM measurement based on SSB after a eighth time,

[0053] the UE turns off or deactivates a receiving module of the wake-up signal,

[0054] the UE is not expected to monitor a monitoring occasion of the first signal from the next monitoring occasion of the first signal,

[0055] the UE is not expected to perform RRM measurement based on the second signal.

[0056] In an implementation, there is an association between the paging occasion and the first signal, and the association is indicated by information carried by the first signal or is a predetermined association.

[0057] In an implementation, the method further comprises: the UE performs at least one of:

[0058] when the UE monitors the PDCCH search space or paging occasion, the UE does not monitor the first signal;

[0059] when the UE monitors the monitoring occasion and / or PEI occasion of DCI with CRC scrambled by PS_RNTI, the UE does not monitor the first signal;

[0060] within a ninth time after receiving the first signal, the UE transmits a second acknowledgement signal for the first signal.

[0061] In an implementation, the second acknowledgement signal is used to indicate at least one of the following to the base station:

[0062] the UE has activated the main radio,

[0063] the UE has deactivated the receiving module of the wake-up signal,

[0064] the UE starts to perform the monitoring of the PDCCH search space or the DCI of the CRC scrambled by PS_RNTI,

[0065] the UE performs monitoring of paging occasion or paging early indication,

[0066] the UE performs RRM measurement based on SSB,

[0067] the UE deactivates the monitoring occasion of the first signal,

[0068] the UE deactivates RRM measurement based on the second signal.

[0069] In an implementation, the UE starts monitoring the PDCCH search space after a second time unit from transmitting the second acknowledgement signal, wherein the second time unit is related to the SCS and / or BWP switch time of the second acknowledgement signal.

[0070] In an implementation, the UE is in RRC INACTIVE or IDLE state, and the first signal and / or the second signal are configured through SIB, and

[0071] If the UE only receives system information change by monitoring the paging early indication or the paging occasion, the UE performs the first operation in case that it is within the tenth time after receiving the system information change and / or before the next PO, and it is determined that the first condition is met.

[0072] In an implementation, the UE is in RRC CONNECTED state, and the first signal and / or the second signal are configured through RRC, and

[0073] the start location or end location of the monitoring occasion of the first signal is determined based on the start time unit of the DRX on duration timer or the long DRX on duration timer and a predefined or preconfigured offset.

[0074] In an implementation, if the UE monitors the first signal within the monitoring occasion of the first signal, and / or the first signal indicates the UE to wake up to monitor the PDCCH within the duration time of the on duration timer of the next DRX, the UE monitors the PDCCH within the duration time of on duration timers of the following N DRXs, and does not monitor the monitoring occasion of the first signal associated with the on duration timers of the N DRXs, from the start time unit of the on duration timer of the next DRX, where N is a value configured by the base station or predefined or a value reported by the UE according to its capability.

[0075] In an implementation, the method further comprises: the UE reports a measurement result corresponding to the RRM measurement, and the measurement result includes indication information for indicating whether the measurement result is based on the second signal.

[0076] In an implementation, if it is determined that the first condition is not satisfied, the first operation is not performed.

[0077] According to at least one embodiment of the present disclosure, a method performed by user equipment (UE) in a communication system is provided, the method comprises: receiving a first sequence and a generation sequence of a first signal, wherein the first sequence indicates or includes part or all of bit information of the first signal, and acquiring information bits of the first signal based on the generation sequence and / or the first sequence of the first signal; and / or receiving a second sequence and a generation sequence of a second signal, wherein the second sequence indicates or includes part or all of bit information of the second signal, and acquiring information bits carried by the second signal based on the generation sequence and / or the second sequence of the second signal.

[0078] In an implementation, the generation sequence of the first signal indicates or includes part of bit information of the first signal, and / or the generation sequence of the second signal indicates or includes part of bit information of the first signal.

[0079] In an implementation, the generation sequence of the first signal indicates or includes at least one of:

[0080] all or part of bits of UE ID;

[0081] all or part of bits of UE group ID;

[0082] all or part of bits of UE subgroup ID;

[0083] index of paging occasion PO.

[0084] In an implementation, payload bits carried by the first sequence of the first signal indicate at least one of:

[0085] all or part of bits of UE ID;

[0086] all or part of bits of UE group ID;

[0087] all or part of bits of UE subgroup ID;

[0088] whether a UE group or UE subgroup corresponding to a PO associated with the first signal needs to wake up to monitor a downlink signal;

[0089] a number of POs associated with the first signal;

[0090] time domain resource of a third acknowledgement signal for the first signal;

[0091] frequency domain resource of the third acknowledgement signal for the first signal.

[0092] In an implementation, the first signal carries at least one of part of bits of UE ID, part of bits of UE group ID and part of bits of UE subgroup ID through the generation sequence.

[0093] In an implementation, the generation sequence of the first signal includes bits indicating index of a PO or indicating index of the PO and corresponding paging frame number.

[0094] In an implementation, the time domain resource of the third acknowledgement signal is indicated by at least one of:

[0095] a time unit offset between a start or end slot of receiving the first signal and transmitting of the third acknowledgement signal;

[0096] start symbol index of the third acknowledgement signal in the time unit;

[0097] symbol length of the third acknowledgement signal;

[0098] wherein the frequency domain resource of the third acknowledgement signal is indicated by at least one of:

[0099] end resource block index;

[0100] start resource block index;

[0101] a number of resource blocks.

[0102] In an implementation, the generation sequence of the second signal indicates at least one of:

[0103] part or all of cell ID,

[0104] index of the second signal.

[0105] In an implementation, payload bits carried by the second sequence of the second signal indicate at least one of:

[0106] part or all of cell ID;

[0107] second signal index of a serving cell and / or a non-serving cell.

[0108] In an implementation, the method further comprises: obtaining a related parameter of the second signal through SIB message in RRC INACTIVE state or obtaining a related parameter of the second signal through RRC message in RRC CONNECTED state,

[0109] wherein the related parameter of the second signal include at least one of:

[0110] frequency domain location of the second signal;

[0111] frequency domain length occupied by the second signal;

[0112] subcarrier spacing of the second signal;

[0113] second signal index of a serving cell and / or a non-serving cell;

[0114] transmission period of the second signal;

[0115] power control offset of the second signal;

[0116] a start point of transmission of the second signal in each transmission period;

[0117] the first symbol or slot index of transmission of the second signal in each transmission period.

[0118] In an implementation, the frequency domain location of the second signal is obtained based on at least one of the frequency domain location of SSB, the location of pointA and a preconfigured offset.

[0119] In an implementation, the related parameter of the second signal also include configuration of a burst set, the burst set including multiple second signals, and every two second signals in the burst set of the second signals are not consecutive in the time domain, or every two second signals in the burst set of the second signals are consecutive in the time domain.

[0120] According to at least one embodiment of the present disclosure, a method performed by a base station in a communication system is provided. The method comprises: transmitting first configuration information for a first signal and second configuration information for a second signal to a user equipment UE; transmitting a third signal to the UE; wherein at least one of the first configuration information and the second configuration information is used by the UE to perform a first operation comprising at least one of monitoring the first signal and radio resource management RRM measurement based on the second signal, wherein the first signal includes a low-power signal for waking up the UE, and the second signal includes a low-power signal for synchronization and / or RRM measurement.

[0121] In an implementation, if the base station does not receive an acknowledgement signal for the third signal within the eleventh time after transmitting the third signal, the base station retransmits the third signal.

[0122] According to at least one embodiment of the present disclosure, a method performed by a base station in a communication system is provided. The method comprises:: transmitting a first sequence and a generation sequence of a first signal to a user equipment UE, wherein the first sequence indicates or includes part or all of bit information of the first signal, and the generation sequence and / or the first sequence of the first signal are used by the UE to acquire information bits of the first signal; and / or transmitting a second sequence and a generation sequence of a second signal to the UE, wherein the second sequence indicates or includes part or all of the bit information of the second signal, and the generation sequence and / or the second sequence of the second signal are used by the UE to acquire the information bits carried by the second signal.

[0123] According to at least one embodiment of the present disclosure, a user equipment (UE) in a communication system is provided. The UE comprises:

[0124] a transceiver configured to transmit and / or receive signals;

[0125] a controller configured to control the UE to perform the method according to at least one embodiment of the present disclosure.

[0126] According to at least one embodiment of the present disclosure, a base station in a communication system is provided. The base station comprises:

[0127] a transceiver configured to transmit and / or receive signals;

[0128] a controller configured to control the base station to perform the method according to at least one embodiment of the present disclosure.

[0129] The present disclosure provides apparatuses and methods for configuring and monitoring low-power wake-up signals.

[0130] In order to explain the technical solution of the embodiment of the present disclosure more clearly, the attached drawings of the embodiment of the present disclosure will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present disclosure, and do not limit the disclosure. In the attached drawings:

[0131] FIG. 1 shows a schematic diagram of an example wireless network according to some embodiments of the present disclosure;

[0132] FIG. 2A illustrates an example wireless transmission path according to some embodiments of the present disclosure;

[0133] FIG. 2B illustrates an example wireless reception path according to some embodiments of the present disclosure;

[0134] FIG. 3A illustrates an example user equipment (UE) according to some embodiments of the present disclosure;

[0135] FIG. 3B illustrates an example gNB according to some embodiments of the present disclosure;

[0136] FIG. 4 illustrates an example operation method according to some embodiments of the present disclosure;

[0137] FIG. 5 illustrates an example operation method according to some embodiments of the present disclosure;

[0138] FIG. 6 illustrates an example operation method according to some embodiments of the present disclosure;

[0139] FIG. 7 shows a block diagram of a hardware structure of a communication device according to some embodiments of the present disclosure.

[0140] In order to meet the increasing demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also called "Beyond 4G networks" or "Post-LTE systems". In order to achieve a higher data rate, 5G communication systems are implemented in higher frequency (millimeter, mmWave) bands, e.g., 60 GHz bands. In order to reduce propagation loss of radio waves and increase a transmission distance, technologies such as beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antenna, analog beamforming and large-scale antenna are discussed in 5G communication systems. In addition, in 5G communication systems, developments of system network improvement are underway based on advanced small cell, cloud radio access network (RAN), ultra-dense network, device-to-device (D2D) communication, wireless backhaul, mobile network, cooperative communication, coordinated multi-points (CoMP), reception-end interference cancellation, etc. In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) as advanced coding modulation (ACM), and filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies have been developed.

[0141] The following description with reference to the accompanying drawings is provided to facilitate a comprehensive understanding of various embodiments of the present disclosure defined by the claims and their equivalents. This description includes various specific details to facilitate understanding but should only be considered as exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the present disclosure. In addition, for the sake of clarity and conciseness, descriptions of well-known functions and structures may be omitted.

[0142] The terms and expressions used in the following specification and claims are not limited to their dictionary meanings, but are only used by the inventors to enable a clear and consistent understanding of the present disclosure. Therefore, it should be obvious to those skilled in the art that the following descriptions of various embodiments of the present disclosure are provided for illustration purposes only and are not intended to limit the purposes of the present disclosure as defined in the appended claims and their equivalents.

[0143] It should be understood that singular forms of "a", "an" and "the" include plural referents unless the context clearly indicates otherwise. Thus, for example, a reference to a "component surface" includes a reference to one or more such surfaces.

[0144] The terms "include" or "may include" refer to the existence of a corresponding disclosed function, operation or component that can be used in various embodiments of the present disclosure, and do not limit the existence of one or more additional functions, operations or features. In addition, the terms "including" or "having" can be interpreted as indicating certain characteristics, numbers, steps, operations, constituent elements, components or combinations thereof, but should not be interpreted as excluding the possibility of the existence of one or more other characteristics, numbers, steps, operations, constituent elements, components or combinations thereof.

[0145] The term "or" used in various embodiments of the present disclosure includes any of the listed terms and all combinations thereof. For example, "a or b" may include a, may include b, or may include both a and b.

[0146] Unless defined differently, all terms (including technical terms or scientific terms) used in this disclosure have the same meaning as those understood by those skilled in the art in this disclosure. Common terms, as defined in dictionaries, are interpreted as having meanings consistent with the context in the relevant technical fields, and should not be interpreted in an idealized or overly formal way unless explicitly defined in this disclosure.

[0147] The technical solution of the embodiment of the application can be applied to various communication systems, such as the Global System for Mobile Communications (GSM) system, code division multiple access (CDMA), CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunications system (, UMTS), worldwide interoperability for microwave access (WiMAX) communication system, 5th generation (5G) system or new radio (NR), etc. In addition, the technical solution of the embodiment of the application can be applied to future-oriented communication technologies.

[0148] FIG. 1 illustrates an example wireless network 100 according to various embodiments of the present disclosure. The embodiment of the wireless network 100 shown in FIG. 1 is for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of the present disclosure.

[0149] The wireless network 100 includes a gNodeB (gNB) 101, a gNB 102, and a gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one Internet Protocol (IP) network 130, such as the Internet, a private IP network, or other data networks.

[0150] Depending on a type of the network, other well-known terms such as "base station" or "access point" can be used instead of "gNodeB" or "gNB". For convenience, the terms "gNodeB" and "gNB" are used in this patent document to refer to network infrastructure components that provide wireless access for remote terminals. And, depending on the type of the network, other well-known terms such as "mobile station", "user station", "remote terminal", "wireless terminal" or "user apparatus" can be used instead of "user equipment" or "UE". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to remote wireless devices that wirelessly access the gNB, no matter whether the UE is a mobile device (such as a mobile phone or a smart phone) or a fixed device (such as a desktop computer or a vending machine).

[0151] gNB 102 provides wireless broadband access to the network 130 for a first plurality of User Equipments (UEs) within a coverage area 120 of gNB 102. The first plurality of UEs include a UE 111, which may be located in a Small Business (SB); a UE 112, which may be located in an enterprise (E); a UE 113, which may be located in a WiFi Hotspot (HS); a UE 114, which may be located in a first residence (R); a UE 115, which may be located in a second residence (R); a UE 116, which may be a mobile device (M), such as a cellular phone, a wireless laptop computer, a wireless PDA, etc. GNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within a coverage area 125 of gNB 103. The second plurality of UEs include a UE 115 and a UE 116. In some embodiments, one or more of gNBs 101-103 can communicate with each other and with UEs 111-116 using 5G, Long Term Evolution (LTE), LTE-A, WiMAX or other advanced wireless communication technologies.

[0152] The dashed lines show approximate ranges of the coverage areas 120 and 125, and the ranges are shown as approximate circles merely for illustration and explanation purposes. It should be clearly understood that the coverage areas associated with the gNBs, such as the coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on configurations of the gNBs and changes in the radio environment associated with natural obstacles and man-made obstacles.

[0153] As will be described in more detail below, one or more of gNB 101, gNB 102, and gNB 103 include a 2D antenna array as described in embodiments of the present disclosure. In some embodiments, one or more of gNB 101, gNB 102, and gNB 103 support codebook designs and structures for systems with 2D antenna arrays.

[0154] Although FIG. 1 illustrates an example of the wireless network 100, various changes can be made to FIG. 1. The wireless network 100 can include any number of gNBs and any number of UEs in any suitable arrangement, for example. Furthermore, gNB 101 can directly communicate with any number of UEs and provide wireless broadband access to the network 130 for those UEs. Similarly, each gNB 102-103 can directly communicate with the network 130 and provide direct wireless broadband access to the network 130 for the UEs. In addition, gNB 101, 102 and / or 103 can provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0155] FIGs. 2A and 2B illustrate example wireless transmission and reception paths according to the present disclosure. In the following description, the transmission path 200 can be described as being implemented in a gNB, such as gNB 102, and the reception path 250 can be described as being implemented in a UE, such as UE 116. However, it should be understood that the reception path 250 can be implemented in a gNB and the transmission path 200 can be implemented in a UE. In some embodiments, the reception path 250 is configured to support codebook designs and structures for systems with 2D antenna arrays as described in embodiments of the present disclosure.

[0156] The transmission path 200 includes a channel coding and modulation block 205, a Serial-to-Parallel (S-to-P) block 210, a size N Inverse Fast Fourier Transform (IFFT) block 215, a Parallel-to-Serial (P-to-S) block 220, a cyclic prefix addition block 225, and an up-converter (UC) 230. The reception path 250 includes a down-converter (DC) 255, a cyclic prefix removal block 260, a Serial-to-Parallel (S-to-P) block 265, a size N Fast Fourier Transform (FFT) block 270, a Parallel-to-Serial (P-to-S) block 275, and a channel decoding and demodulation block 280.

[0157] In the transmission path 200, the channel coding and modulation block 205 receives a set of information bits, applies coding (such as Low Density Parity Check (LDPC) coding), and modulates the input bits (such as using Quadrature Phase Shift Keying (QPSK) or Quadrature Amplitude Modulation (QAM)) to generate a sequence of frequency-domain modulated symbols. The Serial-to-Parallel (S-to-P) block 210 converts (such as demultiplexes) serial modulated symbols into parallel data to generate N parallel symbol streams, where N is a size of the IFFT / FFT used in gNB 102 and UE 116. The size N IFFT block 215 performs IFFT operations on the N parallel symbol streams to generate a time-domain output signal. The Parallel-to-Serial block 220 converts (such as multiplexes) parallel time-domain output symbols from the Size N IFFT block 215 to generate a serial time-domain signal. The cyclic prefix addition block 225 inserts a cyclic prefix into the time-domain signal. The up-converter 230 modulates (such as up-converts) the output of the cyclic prefix addition block 225 to an RF frequency for transmission via a wireless channel. The signal can also be filtered at a baseband before switching to the RF frequency.

[0158] The RF signal transmitted from gNB 102 arrives at UE 116 after passing through the wireless channel, and operations in reverse to those at gNB 102 are performed at UE 116. The down-converter 255 down-converts the received signal to a baseband frequency, and the cyclic prefix removal block 260 removes the cyclic prefix to generate a serial time-domain baseband signal. The Serial-to-Parallel block 265 converts the time-domain baseband signal into a parallel time-domain signal. The Size N FFT block 270 performs an FFT algorithm to generate N parallel frequency-domain signals. The Parallel-to-Serial block 275 converts the parallel frequency-domain signal into a sequence of modulated data symbols. The channel decoding and demodulation block 280 demodulates and decodes the modulated symbols to recover the original input data stream.

[0159] Each of gNBs 101-103 may implement a transmission path 200 similar to that for transmitting to UEs 111-116 in the downlink, and may implement a reception path 250 similar to that for receiving from UEs 111-116 in the uplink. Similarly, each of UEs 111-116 may implement a transmission path 200 for transmitting to gNBs 101-103 in the uplink, and may implement a reception path 250 for receiving from gNBs 101-103 in the downlink.

[0160] Each of the components in FIGs. 2A and 2B can be implemented using only hardware, or using a combination of hardware and software / firmware. As a specific example, at least some of the components in FIGs. 2A and 2B may be implemented in software, while other components may be implemented in configurable hardware or a combination of software and configurable hardware. For example, the FFT block 270 and IFFT block 215 may be implemented as configurable software algorithms, in which the value of the size N may be modified according to the implementation.

[0161] Furthermore, although described as using FFT and IFFT, this is only illustrative and should not be interpreted as limiting the scope of the present disclosure. Other types of transforms can be used, such as Discrete Fourier transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions. It should be understood that for DFT and IDFT functions, the value of variable N may be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N may be any integer which is a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0162] Although FIGs. 2A and 2B illustrate examples of wireless transmission and reception paths, various changes may be made to FIGs. 2A and 2B. For example, various components in FIGs. 2A and 2B can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. Furthermore, FIGs. 2A and 2B are intended to illustrate examples of types of transmission and reception paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communication in a wireless network.

[0163] FIG. 3A illustrates an example UE 116 according to the present disclosure. The embodiment of UE 116 shown in FIG. 3A is for illustration only, and UEs 111-115 of FIG. 1 can have the same or similar configuration. However, a UE has various configurations, and FIG. 3A does not limit the scope of the present disclosure to any specific implementation of the UE.

[0164] UE 116 includes an antenna 305, a radio frequency (RF) transceiver 310, a transmission (TX) processing circuit 315, a microphone 320, and a reception (RX) processing circuit 325. UE 116 also includes a speaker 330, a processor / controller 340, an input / output (I / O) interface 345, an input device(s) 350, a display 355, and a memory 360. The memory 360 includes an operating system (OS) 361 and one or more applications 362.

[0165] The RF transceiver 310 receives an incoming RF signal transmitted by a gNB of the wireless network 100 from the antenna 305. 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 transmitted to the RX processing circuit 325, where the 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 transmits the processed baseband signal to speaker 330 (such as for voice data) or to processor / controller 340 for further processing (such as for web browsing data).

[0166] The TX processing circuit 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. The TX processing circuit 315 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 310 receives the outgoing processed baseband or IF signal from the TX processing circuit 315 and up-converts the baseband or IF signal into an RF signal transmitted via the antenna 305.

[0167] The processor / controller 340 can include one or more processors or other processing devices and execute an OS 361 stored in the memory 360 in order to control the overall operation of UE 116. For example, the processor / controller 340 can control the reception of forward channel signals and the transmission of backward channel signals through the RF transceiver 310, the RX processing circuit 325 and the TX processing circuit 315 according to well-known principles. In some embodiments, the processor / controller 340 includes at least one microprocessor or microcontroller.

[0168] The processor / controller 340 is also capable of executing other processes and programs residing in the memory 360, such as operations for channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. The processor / controller 340 can move data into or out of the memory 360 as required by an execution process. In some embodiments, the processor / controller 340 is configured to execute the application 362 based on the OS 361 or in response to signals received from the gNB or the operator. The processor / controller 340 is also coupled to an I / O interface 345, where the I / O interface 345 provides UE 116 with the ability to connect to other devices such as laptop computers and handheld computers. I / O interface 345 is a communication path between these accessories and the processor / controller 340.

[0169] The processor / controller 340 is also coupled to the input device(s) 350 and the display 355. An operator of UE 116 can input data into UE 116 using the input device(s) 350. The 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). The memory 360 is coupled to the processor / controller 340. A part of the memory 360 can include a random access memory (RAM), while another part of the memory 360 can include a flash memory or other read-only memory (ROM).

[0170] Although FIG. 3A illustrates an example of UE 116, various changes can be made to FIG. 3A. For example, various components in FIG. 3A can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. As a specific example, the processor / controller 340 can be divided into a plurality of processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Furthermore, although FIG. 3A illustrates that the UE 116 is configured as a mobile phone or a smart phone, UEs can be configured to operate as other types of mobile or fixed devices.

[0171] FIG. 3B illustrates an example gNB 102 according to the present disclosure. The embodiment of gNB 102 shown in FIG. 3B is for illustration only, and other gNBs of FIG. 1 can have the same or similar configuration. However, a gNB has various configurations, and FIG. 3B does not limit the scope of the present disclosure to any specific implementation of a gNB. It should be noted that gNB 101 and gNB 103 can include the same or similar structures as gNB 102.

[0172] As shown in FIG. 3B, gNB 102 includes a plurality of antennas 370a-370n, a plurality of RF transceivers 372a-372n, a transmission (TX) processing circuit 374, and a reception (RX) processing circuit 376. In certain embodiments, one or more of the plurality of antennas 370a-370n include a 2D antenna array. gNB 102 also includes a controller / processor 378, a memory 380, and a backhaul or network interface 382.

[0173] RF transceivers 372a-372n receive an incoming RF signal from antennas 370a-370n, such as a signal transmitted by UEs or other gNBs. RF transceivers 372a-372n down-convert the incoming RF signal to generate an IF or baseband signal. The IF or baseband signal is transmitted to the RX processing circuit 376, where the RX processing circuit 376 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. RX processing circuit 376 transmits the processed baseband signal to controller / processor 378 for further processing.

[0174] The TX processing circuit 374 receives analog or digital data (such as voice data, network data, email or interactive video game data) from the controller / processor 378. TX processing circuit 374 encodes, multiplexes and / or digitizes outgoing baseband data to generate a processed baseband or IF signal. RF transceivers 372a-372n receive the outgoing processed baseband or IF signal from TX processing circuit 374 and up-convert the baseband or IF signal into an RF signal transmitted via antennas 370a-370n.

[0175] The controller / processor 378 can include one or more processors or other processing devices that control the overall operation of gNB 102. For example, the controller / processor 378 can control the reception of forward channel signals and the transmission of backward channel signals through the RF transceivers 372a-372n, the RX processing circuit 376 and the TX processing circuit 374 according to well-known principles. The controller / processor 378 can also support additional functions, such as higher-level wireless communication functions. For example, the controller / processor 378 can perform a Blind Interference Sensing (BIS) process such as that performed through a BIS algorithm, and decode a received signal from which an interference signal is subtracted. A controller / processor 378 may support any of a variety of other functions in gNB 102. In some embodiments, the controller / processor 378 includes at least one microprocessor or microcontroller.

[0176] The controller / processor 378 is also capable of executing programs and other processes residing in the memory 380, such as a basic OS. The controller / processor 378 can also support channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. In some embodiments, the controller / processor 378 supports communication between entities such as web RTCs. The controller / processor 378 can move data into or out of the memory 380 as required by an execution process.

[0177] The controller / processor 378 is also coupled to the backhaul or network interface 382. The backhaul or network interface 382 allows gNB 102 to communicate with other devices or systems through a backhaul connection or through a network. The backhaul or network interface 382 can support communication over any suitable wired or wireless connection(s). For example, when gNB 102 is implemented as a part of a cellular communication system, such as a cellular communication system supporting 5G or new radio access technology or NR, LTE or LTE-A, the backhaul or network interface 382 can allow gNB 102 to communicate with other gNBs through wired or wireless backhaul connections. When gNB 102 is implemented as an access point, the backhaul or network interface 382 can allow gNB 102 to communicate with a larger network, such as the Internet, through a wired or wireless local area network or through a wired or wireless connection. The backhaul or network interface 382 includes any suitable structure that supports communication through a wired or wireless connection, such as an Ethernet or an RF transceiver.

[0178] The memory 380 is coupled to the controller / processor 378. A part of the memory 380 can include an RAM, while another part of the memory 380 can include a flash memory or other ROMs. In certain embodiments, a plurality of instructions, such as the BIS algorithm, are stored in the memory. The plurality of instructions are configured to cause the controller / processor 378 to execute the BIS process and decode the received signal after subtracting at least one interference signal determined by the BIS algorithm.

[0179] As will be described in more detail below, the transmission and reception paths of gNB 102 (implemented using RF transceivers 372a-372n, TX processing circuit 374 and / or RX processing circuit 376) support aggregated communication with FDD cells and TDD cells.

[0180] Although FIG. 3B illustrates an example of gNB 102, various changes may be made to FIG. 3B. For example, gNB 102 can include any number of each component shown in FIG. 3A. As a specific example, the access point can include many backhaul or network interfaces 382, and the controller / processor 378 can support routing functions to route data between different network addresses. As another specific example, although shown as including a single instance of the TX processing circuit 374 and a single instance of the RX processing circuit 376, gNB 102 can include multiple instances of each (such as one for each RF transceiver).

[0181] The time domain unit (also called time unit) in this application can be: an OFDM symbol, an OFDM symbol group (composed of multiple OFDM symbols), a slot, a slot group (composed of multiple slots), a subframe, a subframe group (composed of multiple subframes), a system frame and a system frame group (composed of multiple system frames); it can also be an absolute time unit, such as 1 millisecond, 1 second, etc. A time unit can also be a combination of various granularities, such as N1 slots plus N2 OFDM symbols.

[0182] The frequency domain unit (also called frequency unit) in this application can be: a subcarrier, a subcarrier group (composed of multiple subcarriers), a resource block (RB), which can also be called a physical resource block (PRB), a resource block group (composed of multiple RBs), a bandwidth part (BWP). It can also be an absolute frequency domain unit, such as 1 Hz, 1 kHz, etc. The frequency domain unit can also be a combination of multiple granularities, such as M1 PRBs plus M2 subcarriers.

[0183] Exemplary embodiments of the present disclosure are further described below with reference to the accompanying drawings.

[0184] Text and drawings are provided as examples only to help readers understand the present disclosure. They are not intended and should not be construed to limit the scope of the present disclosure in any way. Although certain embodiments and examples have been provided, based on the disclosure herein, it is obvious to those skilled in the art that changes can be made to the illustrated embodiments and examples without departing from the scope of this disclosure.

[0185] The transmission link of the wireless communication system disclosed in the present disclosure mainly includes a downlink communication link from 5G New Radio (NR) gNB to User Equipment (UE), an uplink communication link from UE to network, and a sidelink communication link from UE to UE.

[0186] In a wireless communication system, such as the current wireless communication system, in order to reduce the energy consumption of the terminal side, a Not consecutive Reception (DRX) mechanism is introduced, so that the UE can be in a sleep state most of the time, and only needs to be awakened periodically to monitor a Paging Occasion (PO). In a DRX cycle, the UE only wakes up to monitor the PO during the DRX ON duration. After monitoring the PDCCH scrambled with P-RNTI, the UE continues to read the paged terminal flag in the paging message. If the read terminal flag is the same as its own flag, the UE further reads the paging message, otherwise, it discards the paging message. In the above process, in order to further reduce the energy consumption of the UE, a Paging early indication (PEI) signal is introduced to indicate whether the UE needs to monitor the corresponding PO. If the system information provides the PEI configuration, the UE monitors the PEI occasion once every DRX cycle. If the UE detects the PEI indication and the PEI instructs the UE to monitor the associated PO, the UE should wake up at the next PO to monitor the PO. Otherwise, the UE does not need to wake up to monitor the PO.

[0187] In RRC CONNECTED state, each DRX cycle includes an active time and a non-active time, the UE needs to monitor the PDCCH in the active time, and in the non-active time, the UE does not need to monitor the PDCCH. The UE starts the drx-onDurationTimer (DRX on duration timer) at the beginning of each DRX cycle to start monitoring the PDCCH. If downlink control information (DCI) scheduling new data transmission is monitored by the UE, the UE starts the drx-inactivityTimer (DRX inactive timer). During the active time of DRX, the base station can signal the UE to enter the DRX inactive time in advance, or when all the DRX timers of the UE stop running, the UE can enter the DRX inactive time. In order to further reduce the energy consumption of UE, a DCI with CRC scrambled by power saving-radio network temporary identifier (PS_RNTI) (DCI with CRC scrambled by PS_RNTI, DCP) signal is introduced. When the 1-1bit wake-up indicator is 1, the drx-onDurationTimer is started at the beginning of the next DRX or long DRX cycle.

[0188] In some use cases (such as Internet of Things devices and / or wearable devices) that require more stringent low power consumption of UE, in order to further extend the battery life of UE, the wireless communication system can use a low power wake-up signal (LPWUS) to wake up the UE to perform receiving of signals and / or channels. Therefore, it is necessary to design the method of monitoring LPWUS. Optionally, a low-power synchronization signal can be configured for downlink synchronization and / or RRM (Radio Resource Management) measurement of LPWUS signals.

[0189] In this disclosure, a method for configuring and monitoring low-power wake-up signals and the corresponding device will be introduced.

[0190] FIG. 4 illustrates an example operation method according to some embodiments of the present disclosure. In an embodiment of the present disclosure, determining configuration information of LPWUS and the flow of activating or deactivating monitoring of LPWUS, and determining the configuration information and application conditions of low-power synchronization signals will be introduced with reference to FIG. 4. In the embodiment of the present disclosure, LPWUS and LP-SS are respectively used for exemplary introduction of low-power wake-up signal and low-power synchronization signal, and the introduced methods can also be used for configuration and transmission of other signals. For convenience of description, in the following description, a first signal will be used to describe a low-power signal for waking up UE, such as a low-power wake-up signal, and a second signal will be used to describe a low-power signal for synchronization and / or RRM measurement, such as a low-power synchronization signal. Moreover, for the convenience of description, "low power" and "low power consumption" are not distinguished, that is, "low power" and "low power consumption" can express the same or similar meanings in the following description.

[0191] In some embodiments, the receiver of the UE includes two modules, one is a Main Radio (MR) for receiving the normal signals / channels sent by the base station, and the other is a lower power wake-up signal receiver (LPWUR) for receiving the first signal and / or the second signal sent by the base station. Wherein, the first signal is a wake-up signal, such as LPWUS, used to wake up the MR of the UE to perform signal reception. The second signal is a synchronization signal received at LPWUR, which can be used to provide synchronization information for the first signal and perform RRM measurement at LPWUR.

[0192] In some embodiments, the second signal includes at least one of: lower power synchronization signal (LP-SS), SSB, PSS, SSS, PBCH DMRS, TRS, etc.

[0193] In some embodiments, when the MR is in sleep, the LPWUR can monitor the first signal with extremely low power. Once the UE monitors the first signal, the LPWUR can trigger the MR to switch from sleep to active, so that specific operations can be performed. The special module is used to receive the first signal because the first signal is a waveform obtained further based on amplitude shift keying (ASK) modulation and / or frequency shift keying (FSK) modulation in the time domain on the basis of using orthogonal frequency division multiplexing (OFDM)-based waveform in the existing NR system, in which on-off keying (OOK) modulation is a special case of amplitude shift keying (ASK) modulation.

[0194] According to one aspect of the present disclosure, the manner and contents of information bits carried by the first signal and / or the second signal will be described below.

[0195] In some embodiments, when a UE receives a first signal, the UE may receive a first sequence (e.g., a time domain sequence) of the first signal and obtain a generation sequence of the first signal according to the received first sequence. For example, the generation sequence of the first signal is one sequence of multiple predefined or preconfigured sequences, and the generation sequence of the first signal can be obtained by detecting the association between the received first sequence of the first signal and the multiple predefined or preconfigured sequences. The first sequence of the first signal is used to carry payload, and the generation sequence of the first signal and the first sequence constitute the first signal. Similarly, the generation sequence of the second signal can be obtained according to the received second sequence of the second signal, the second sequence of the second signal is used to carry the payload of the second signal, and the generation sequence and the second sequence of the second signal constitute the second signal.

[0196] In some embodiments, the OFDM-based generation sequence(s) of the first signal and / or the second signal can be generated based on one or more predefined and / or preconfigured sequences, such as ZC sequence, M sequence, etc., and can also be based on the base station implementation. When the generation sequence is generated using predefined and / or preconfigured sequences, the coverage of the first signal and / or the second signal and the detection performance of the UE for the first signal and / or the second signal will be better. In some embodiments, the second signal may be a single signal. Alternatively, in some embodiments, the second signal may be a burst set of signals, such as a burst set including multiple second signals.

[0197] In some embodiments, the generation sequence(s) of the first signal and / or the second signal is / are mapped onto OFDM symbols for transmission of the first signal and / or the second signal. The generating method of the generation sequence(s) of the first signal and / or the second signal may include one or a combination of:

[0198] o The generation sequence may imply (or indicate, in this disclosure, "imply" is used to represent the meaning such as "indicate", "implicitly indicate" or "implicitly include", the same below) all or part of the cell ID, by reducing the inter-cell mutual interference of the first signal or the second signal and / or the inter-cell mutual interference of the second signals by code division multiplexing, the inter-cell interference is randomized. For example, all or part of the cell ID refers to all or part of one cell ID. In addition, in some alternative embodiments, all or part of the cell ID may refer to all or part of information included in at least one cell ID.

[0199] o The method for implying all or part of the cell ID may include one or more of:

[0200] ■ Alternatively, if the payload bits of the second signal only carry part of the cell ID, the remaining most significant bit or least significant bit part of the cell ID or all of the cell ID may be carried implicitly by the generation sequence.

[0201] ■ Alternatively, if the payload bits of the second signal only carry part of the cell ID, the cell ID implied by PSS may be implied by the generation sequence of the second signal, and the cell ID implied by SSS may be carried by the payload bits of the second signal.

[0202] ■ Optionally, when the payload bits of the second signal carry all the cell IDs, the cell ID implied by PSS or the most significant bit or least significant bit part of the cell ID can also be implied by the generation sequence of the second signal. Such operation is mainly to randomize the inter-cell interference or enable the UE that can decode the generation sequence to obtain the information bits faster.

[0203] o The generation sequence of the second signal may imply the index number of the second signal in a burst set of second signals, which is used to determine the index of the second signal received by the UE in a burst set of second signals;

[0204] o The generation sequence of the first signal may imply all UE ID and / or UE group ID and / or UE subgroupID;

[0205] o The generation sequence of the first signal may imply part of UE ID and / or UE group ID and / or UE subgroup ID, which is suitable for the case that the length of UE ID and / or UE group ID and / or UE subgroup ID exceeds the length of the payload bits carried by the first signal, or designed to enable the UE that can decode the generation sequence to obtain information bits more quickly.

[0206] o The method for generation sequence implying all and / or part of UE ID and / or UE group ID and / or UE subgroup ID may include one or more of:

[0207] ■ The generation sequence may imply V most significant bits or V least significant bits of the UE ID and / or the UE group ID and / or the UE subgroup ID that exceed the length of payload bits carried by the first signal by way of generating various sequences. Where V is a predefined or preconfigured value and V is a positive integer.

[0208] ■ The generation sequence may imply the number of IDs which is the remainder of the total number X of UE IDs and / or UE group IDs and / or UE subgroup IDs to the length L of payload bits carried by the first signal by generating various sequences. After the UE obtains ID1 carried by the generation sequence, in combination with the obtained payload bits ID2, the UE can calculate the ID value corresponding to the UE ID and / or the UE group ID and / or the UE subgroup ID through the following formula:

[0209]

[0210] o The generation sequence of the first signal may imply the index of all or part of the paging occasions (POs). If the first signal can be associated with multiple POs, the first signal may imply the index of the corresponding POs. The method of implying index of all or part of POs may include one or more of:

[0211] ■ If the first signal can be associated with Q POs, the generation sequence can carry m-bit indication information, which is used to indicate the corresponding 2mPO indexes, where Q and m can be predefined or preconfigured positive integers, and 2mis greater than or equal to Q. For example, if the first signal can be associated with 8 POs, the generation sequence can carry 3-bit indication information to indicate the corresponding PO index, such as 000 indicating the first PO, 001 indicating the second PO, and so on;

[0212] ■ If the first signal can be associated with L subframes and / or Q POs, the generation sequence can carry the radio frame (or paging frame) index of the POs and / or the PO index within the subframe to indicate the corresponding PO. For example, if the first signal can be associated with 8 POs, and every 4 POs are configured in a radio frame (or paging frame), the generation sequence can carry 3-bit indication information, with the most significant bit indicating the index of the radio frame and the remaining 2 bits indicating the index of the POs in the radio frame, such as 000 indicating the first PO in the first radio frame, 100 indicating the first PO in the second radio frame, and so on;

[0213] o The generation sequence may be the same as the sequence for generating the primary synchronization signal PSS or the secondary synchronization signal SSS. Since the first signal and / or the second signal are triggered to be received after the UE accesses the network, that is, the UE knows the PSS or SSS sequence when receiving the first signal and / or the second signal, it is unnecessary to additionally configure a new OFDM sequence for the detection of the first signal and / or the second signal in this way.

[0214] In some embodiments, the first signal and / or the second signal can be further generated as a modulated sequence through OOK modulation in the time domain, and the UE receives the modulated sequence through energy detection, so as to reduce the detection complexity of the receiving end and reduce power consumption. The OOK modulated time domain sequence may be a predefined or preconfigured sequence, that is, the length of payload bits carried by the first signal and / or the second signal may be fixed, or the sequence may be configured by SIB (system information block) in the RRC INACTIVE state, or the sequence may be configured by RRC signaling in the RRC CONNECTED state. Wherein the payload bits carried by the first signal include one or more of:

[0215] o Payload bits carried by the first signal can be used to indicate UE ID and / or UE group ID; optionally, if the length of the UE ID and / or the UE group ID exceeds the length of payload bits carried by the first signal, part of the UE ID and / or the UE group ID may be implied through the generation sequence of the first signal;

[0216] o The payload bits carried by the first signal can be used to indicate all or part of the UE subgroup ID. Optionally, if the UE group ID can be carried in other ways, such as by way of implied using the generation sequence, the payload bits carried by the first signal can be used to indicate the UE subgroup ID. Optionally, if the UE group ID can be carried in other ways, such as by way of implied using the generation sequence, the payload bits carried by the first signal can be used to indicate all or part of the UE subgroup ID, and the part of the UE subgroup ID can be the most significant bis or least significant bits of the UE subgroup ID.

[0217] o The payload bits carried by the first signal can be used to indicate whether a first number of UE groups or UE subgroups need to wake up to monitor the PDCCH, wherein the first number is equal to the number of paging occasions (POs) associated with the first signal multiplied by the number of UE groups or UE subgroups corresponding to each PO. If the number of UE subgroups in the PO is configured and / or the number of UE subgroups associated with the PO is not 0, each payload bit indicates whether a UE subgroup associated with a PO needs to wake up to monitor the PDCCH. Otherwise, each payload bit indicates whether a UE group associated with a PO needs to wake up to receive downlink signals and / or channels.

[0218] o The payload bits carried by the first signal can be used to indicate the number of paging occasions (POs) associated with the first signal, to indicate the number of POs that the UE needs to consecutively monitor when the first signal is received.

[0219] o The payload bits carried by the first signal can be used to indicate the time domain resources for the acknowledgement signal corresponding to the first signal. After receiving the first signal, the UE instructs to turn on the main radio and / or perform the monitoring of PDCCH. After the main radio of the UE is turned on, it transmits an acknowledgement signal to align the understanding of the current state between the UE and the base station. The way to indicate the time domain resources for the acknowledgement signal can be indicated by an index of a preconfigured association relationship, the index can be used to indicate at least one of:

[0220] ■ The offset from the start or end of the slot when the first signal is received to the transmission of the acknowledgement signal, and the offset takes a slot as the granularity.

[0221] ■ The start symbol index of the acknowledgement signal in a slot.

[0222] ■ The symbol length of the acknowledgement signal in time domain.

[0223] For example, index 1 represents an OFDM symbol with an offset of 2 slots and a start symbol index of 2, and the symbol length is 1 OFDM symbol;

[0224] o The payload bits carried by the first signal may be used to indicate the frequency domain resources for the acknowledgement signal corresponding to the first signal, and may include at least one of:

[0225] ■ The index indicating the end resource block, starting from a predefined or preconfigured start point (such as pointA), the maximum value of which is the index value of the resource block of UL BWP,

[0226] ■ Start resource block index

[0227] ■ The number of consecutive resource blocks, which is used to indicate the length of the acknowledgement signal occupied in the frequency domain;

[0228] In some embodiments, the payload bits carried by the second signal may include one or more of:

[0229] o All or part of the cell ID. Considering that the second signal is mainly used for downlink synchronization and RRM measurement, carrying cell ID can reduce the inter-cell interference of the second signal. In addition, if the UE supports using LP-SS to perform RRM measurement of neighbor cells, the second signal of different cells can be distinguished by carrying cell ID.

[0230] o Second signal index of serving cell and / or non-serving cell. When performing beam sweep based on the second signal, the UE can identify the second signal index of the currently received second signal within a burst set of second signals through the carried second signal index, so that the base station and the UE have the same understanding.

[0231] Further, the embodiment of the present disclosure also designs the configuration method and application conditions for the low-power synchronization signal. Since the second signal is received by LPWUR after the UE accesses the network, the related parameter of the second signal can be configured by SIB message in RRC INACTIVE state and / or RRC message in RRC CONNECTED state.

[0232] In some embodiments, the related parameter of the second signal may include one or more of:

[0233] o Frequency domain location for transmitting the second signal. Optionally, the frequency domain location for transmitting the second signal is the same as that for transmitting the first signal. For example, the frequency domain location for transmitting the second signal can be calculated by the frequency domain location of SSB and a predefined or preconfigured frequency domain offset. After the UE determines the location of SSB on the synchronization raster, it determines the start location of SSB on the channel raster by the frequency deviation KSSBbetween the No.0 subcarrier of No.0 RB of SSB indicated in MIB and the No.0 subcarrier of the lowest RB of RBs in BWP overlapping with SSB. The preconfigured or predefined offset can be positive or negative; or, the location of pointA is calculated by taking the start location of SSB on the channel raster as a start point, and the frequency domain location for transmitting second signal is calculated through pointA and a preconfigured or predefined offset. Optionally, the offset is an integer multiple of PRB.

[0234] o Frequency domain length occupied by the second signal. Optionally, the frequency domain resources for transmitting the second signal are N consecutive PRBs, where N can be a positive integer.

[0235] o The frequency domain location of the second signal may be the frequency domain start location, the frequency domain center location or the frequency domain end location of the second signal.

[0236] o The subcarrier spacing of the second signal. Optionally, the subcarrier spacing of the second signal is the same as that of the first signal, or may be the same as that of a first downlink signal / channel,

[0237] wherein, the first downlink signal / channel may include one or more of:

[0238] Optionally, the first downlink signal / channel may be a physical downlink control channel (PDCCH) and / or a physical downlink shared channel (PDSCH). In some embodiments, the physical downlink control channel (PDCCH) may be a specific PDCCH (and / or repetition transmission of PDCCH), and the physical downlink shared channel (PDSCH) may be a specific PDSCH (and / or repetition transmission of PDSCH). In some embodiments, the PDCCH and / or PDSCH may be message 2(msg2) and / or message B(msgB), the PDCCH / PDSCH (and / or repetition transmission of PDCCH / PDSCH) of message 2(msg2) and / or message B(msgB) in random access procedure (RA procedure). As another example, the PDCCH and / or PDSCH may be High Priotiry (HP) or Low Priotiry (LP) PDSCH (and / or repetition transmission of PDSCH). For another example, the PDCCH and / or PDSCH may be the search space of the PDCCH and / or PDSCH (and / or repetition transmission of the PDCCH / PDSCH) of the control resource set 0 (CORESET0) of message 3(msg3). For another example, the PDCCH and / or PDCCH may be the search space of downlink physical downlink control channel (DL PDCCH) (and / or repetition transmission of DL PDCCH) of message 4 (msg4); in some implementations, the PDCCH and / or PDSCH may also be referred to as random access procedure-related PDCCH / PDSCH; in some implementations, the PDSCH may also be a PDSCH scheduled by MAC CE; in some implementations, the PDCCH and / or PDSCH may also be a physical downlink control channel PDCCH and / or a physical downlink shared channel PDSCH scheduling and / or transmitting system information blocks (SIBs), a PDCCH and / or PDSCH scheduling and / or transmitting control resource set 0 (CORESET0); in some implementations, the PDCCH and / or PDSCH may also be a PDCCH and / or PDSCH scheduling and / or transmitting a downlink small data transmission (DL SDT) signal; in some implementations, optionally, the PDCCH and / or PDSCH may be paging downlink control information (paging DCI), paging PDSCH and / or paging PDCCH in an idle state and / or an inactive state.

[0239] Optionally, the first downlink signal / channel may be a synchronization signal block (SSB) (including but not limited to cell-specific SSB (CD-SSB) and / or non-cell-specific SSB(NCD-SSB)) and / or a channel state information reference signal (CSI-RS).

[0240] o Second signal index of a serving cell and / or a non-serving cell. The second signal block in the burst set of second signals is identified according to the second signal index. For example, a burst set of second signals may contain 4 or 8 second signals, that is, 4 or 8 second signal indexes in a burst set of second signals can be indicated by 2 bits or 3 bits.

[0241] o The transmission period of the second signal. If this field is missing, the UE applies the default or preset value of the transmission period of the second signal, for example, 320 ms.

[0242] o The power control offset of the second signal. The power of the second signal (for example, the reference signal power) can be calculated from the transmission power of SSB (for example, ss-PBCH-BlockPower) and the power control offset. The power control offset provides an offset of the second signal transmission power relative to the SSB transmission power. If the power control offset is not provided, the UE assumes that the offset is a default value or a preset value, for example, 0dB. Alternatively, if the UE is configured to receive the second signal periodically, the power of the second signal (for example, the reference signal power) may be provided by the transmission power of the SSB or the power control offset. Optionally, the power control offset may be 3dB or 6dB.

[0243] o The start point of transmission of the second signal in each transmission period of the second signal, indicating the system frame number (SFN) offset of the time for transmitting the second signal to the start point of the transmission period of the second signal. For example, a value of 0 indicates that the second signal is transmitted in the first system frame, and a value of 1 indicates that the second signal is transmitted in the second system frame.

[0244] o The index of the first symbol or slot for transmission of the second signal in each transmission period of the second signal. Optionally, Index 0 corresponds to the first slot or the first symbol of the first slot in the transmission period of the second signal. Optionally, the second signal may be configured across slots.

[0245] o In time domain, UE assumes that the second signal is transmitted starting from the first symbol or slot index for transmission of the second signal and in the form of a burst set of second signals. Optionally, the length of the burst set of second signals can be obtained by way of configuration. If the length of the burst set of second signals is not provided, the UE assumes that the length of the burst set of second signals is X consecutive radio frames, where X is a preconfigured or predefined or default value. Optionally, in a burst set of second signals, every two second signals can be consecutive in time domain resources, which is helpful for the UE to realize rapid synchronization and RRM measurement through the consecutively transmitted second signals. Optionally, in a burst set of second signals, every two second signals are not consecutive in time domain resources, and not consecutive resources are helpful for the UE to monitor the first downlink signal / channel and / or the first signal.

[0246] In an embodiment, the UE activates and / or deactivates the periodic monitoring or consecutive monitoring of the first signal, and / or activates and / or deactivates the RRM measurement by the UE based on the second signal, and / or deactivates and / or activates the RRM measurement by the UE based on SSB by receiving a third signal and / or by requesting the base station to transmit the third signal through a fourth signal. Alternatively, the base station transmits the first signal only after transmitting the third signal, and the UE expects to monitor the first signal and / or perform RRM measurement based on the second signal only after receiving the third signal.

[0247] Optionally, the third signal includes a combination of one or more of:

[0248] o A DCI message. DCI information can be used to indicate the activation and / or deactivation of periodic monitoring or consecutive monitoring of the first signal, and / or the activation and / or deactivation of the RRM measurement by the UE based on the second signal, and / or the deactivation and / or activation of the SSB-based RRM measurement by the UE. Alternatively, 1-bit information can be used to indicate activation or deactivation, and when the 1-bit information indicates '1' or '0', the receiving module of low-power wake-up signal is activated, and / or the UE is instructed to start performing periodic monitoring in the next first signal period based on the first signal or to perform consecutive monitoring of the first signal after a predefined and / or preconfigured time offset, and / or the UE is instructed to perform RRM measurement based on the second signal, and / or the UE is instructed not to monitor a monitoring occasion from the monitoring occasion for the next PDCCH search space or DCI with CRC scrambled by PS_RNTI, and / or the UE is instructed no longer to perform RRM measurement based on SSB;

[0249] In some embodiments, a DCI message with CRC scrambled by a new RNTI for enabling the first signal can transmit at least one of the following information: 1-bit DCI format identification information for indicating the DCI format, PDCCH to HARQ feedback time indication for indicating the transmitting the acknowledgement signal ACK from the UE receives the third signal, BWP indication for indicating BWP, time domain resource allocation for the acknowledgement signal, and frequency domain resource allocation for the acknowledgement signal. The time domain resource allocation for the acknowledgement signal may indicate to determine the start point and the number of durative symbols of a preconfigured acknowledgement signal in the slot through the carried information bits. The frequency domain resource allocation for the acknowledgement signal can indicate the index of the end resource block from a predefined or preconfigured start point through corresponding bit indication, wherein the maximum value is the index value of the resource block of UL BWP; and / or indicating the frequency domain resources for the acknowledgement signal by a start resource block and the number of consecutive resource blocks. The value of PDCCH to HARQ feedback time indication may be the lower bound of the slot q of receiving DCI multiplied by plus a predefined and / or preconfigured value; where represents the SCS configuration adopted by the acknowledgement signal and represents the SCS configuration adopted by the DCI message, as shown in FIG. 5. Optionally, the DCI message informs one or a group of UE of energy saving information within a DRX active time or in case of DRX cycle not configured;

[0250] o A MAC CE message. If the field indicating activation or deactivation in the MAC CE message indicates '1' or '0', activate the receiving module of the low-power wake-up signal, and / or instruct the UE to perform periodic monitoring or consecutive monitoring based on the first signal, and / or instruct the UE to perform RRM measurement based on the second signal, and / or instruct the UE not to monitor the PDCCH search space or DCI with CRC scrambled by PS_RNTI, and / or instruct the UE not to monitor the paging occasions or the paging early indication, and / or instruct the UE not to perform RRM measurement based on SSB.

[0251] In some embodiments, the MAC CE message further includes a BWP ID, which is used to indicate the DL BWP to which the MAC CE is applied, and the length of the BWP ID field is 2 bits;

[0252] In some embodiments, the MAC CE message further includes a UE ID or a UE group ID, and this field is used to indicate the UE or UE group to which the MAC CE message is applied, to indicate a UE or a group of UEs to perform the activation or deactivation operation.

[0253] In some embodiments, the fourth signal includes a combination of one or more of:

[0254] o UCI signal.

[0255] o UL MAC CE signal.

[0256] o Assistance information. Alternatively, the assistance information may be periodic assistance information. It can include at least one of: the RSRP and / or RSRQ of SSB, the index of SSB, the DL BWP ID where SSB is located, the associtation between SSB and TRP, and the absolute value of the change or difference of the RSRP and / or RSRQ of SSB within a predefined and / or preconfigured period of time.

[0257] In some embodiments, the fields carried by the fourth signal may be the same as those carried by the third signal. If the fourth signal is a UL MAC CE signal, it does not carry BWP ID information.

[0258] In some embodiments, after the UE receives the third signal sent by the base station, or if the UE determines that the received third signal indicates the corresponding UE or UE group to perform the operation of activating or deactivating the LPWUS monitoring duration, before receiving the first signal and / or before determining that the first signal indicates to wake up the main radio of the UE and / or indicates the UE to monitor the PDCCH search space set or DCI with CRC scrambled by PS_RNTI, and / or indicates the UE to monitor the paging occasion or the paging early indication, the behavior of the UE includes one or more of:

[0259] o UE turns on the receiving module of low-power wake-up signal;

[0260] o The UE periodically monitors the monitoring occasion of the first signal or monitors each configured monitoring occasion of the first signal;

[0261] o The UE performs RRM measurement based on the second signal.

[0262] o The main radio of the UE enters a sleep state.

[0263] o The UE transmits an acknowledgement signal. Optionally, within a predefined and / or preconfigured time unit (for example, the time unit can be a slot, symbol, etc.) after the UE receives the third signal sent by the base station, and / or before the main radio enters the sleep state, the UE transmits an acknowledgement signal, feeds back to the network that the UE has activated the receiving module of the low-power wake-up signal, and / or has deactivated the main radio, and / or the UE no longer monitors the PDCCH search space or DCI with CRC scrambled by PS_RNTI, and / or the UE no longer monitors paging occasion or paging early indication, and / or the UE no longer performs RRM measurement based on SSB. If the UE does not transmit the acknowledgement signal or the network does not receive the acknowledgement signal sent by the UE within the predefined or preconfigured time unit, the base station retransmits the third signal. Alternatively, the acknowledgement signal may be a 1-bit signal. Alternatively, the acknowledgement signal may be an ACK signal. Optionally, when the third signal is DCI information, the DCI signal is not used for data scheduling, and the acknowledgement signal is an ACK signal for the DCI signal;

[0264] o If the UE receives the third signal, the UE applies the activation command after the first slot after slot , where k is the slot where the UE transmits the acknowledgement information, and is the number of slots in a subframe when the subcarrier spacing (SCS) configuration is u, and u is the SCS configuration of the acknowledgement signal,wcan bew=0, orwmay be the number of slots when SCS configuration is 0 and / or be provided by high-layer parameters,w=0 if it is not provided by high-layer parameters,ris the switching time of BWP, and optionally,r=0;

[0265] o The UE is not expected to monitor the PDCCH search space set and / or paging occasions. Optionally, after the UE receives the third signal sent by the base station, the UE is not expected to monitor or no longer monitors the monitoring occasion from the next PDCCH search space set and / or paging occasion;

[0266] o In the RRC CONNECTED state, the UE is not expected to monitor DCI with CRC scrambled by PS_RNTI, such as DCI format 2_6. Optionally, after receiving the third signal sent by the base station, the UE is not expected to monitor or no longer monitors the monitoring occasion from the next monitoring occasion for DCI with CRC scrambled by PS_RNTI;

[0267] o In the RRC INACTIVE state, the UE is not expected to monitor the paging early indication, such as DCI format 2_7. Optionally, after receiving the third signal sent by the base station, the UE is not expected to monitor the monitoring occasion from the next PEI monitoring occasion.

[0268] In some embodiments, after the UE receives the first signal sent by the base station, the behavior of the UE includes one or more of:

[0269] o The UE turns on the main radio;

[0270] o In RRC CONNECTED state, the UE monitors the PDCCH search space or DCI with CRC scrambled by PS_RNTI after a predefined and / or preconfigured time unit;

[0271] o In RRC INACTIVE state, UE monitors paging early indication or paging occasion after a predefined and / or preconfigured time unit. Optionally, the paging occasion may have a definite association with the first signal, which may be indicated by the information carried by the first signal or a fixed association;

[0272] o The UE performs RRM measurement based on SSB after a predefined and / or preconfigured time unit;

[0273] o The UE turns off the receiving module of the low-power wake-up signal;

[0274] o The UE is not expected to monitor the monitoring occasion start from the next monitoring occasion of the first signal;

[0275] o The UE does not need to perform RRM measurement based on the second signal;

[0276] o When the UE monitors the PDCCH search space set and / or the paging occasion, the UE does not monitor the first signal;

[0277] o When the UE monitors the monitoring occasion of DCI with CRC scrambled by PS_RNTI and / or PEI occasion, the UE does not monitor the first signal;

[0278] o Within a predefined and / or preconfigured time unit after receiving the first signal sent by the base station, the UE transmits an acknowledgement signal, to feedback to the network indicating that the UE has activated the main radio, and / or deactivated the receiving module of the low-power wake-up signal, and / or the UE starts to monitor the PDCCH search space or DCI with CRC scrambled by PS_RNTI, and / or the UE performs monitoring of the paging occasion or paging early indication, and / or the UE performs RRM measurement based on SSB, and / or deactivates the monitoring occasion of the first signal, and / or deactivates RRM measurement based on the second signal. If the UE does not transmit the acknowledgement signal or the network does not receive the acknowledgement signal sent by the UE within the predefined or preconfigured time unit, the base station retransmits the first signal. The predefined and / or preconfigured time unit includes the warming time for the main radio from the ultra-deep sleep state to the wake-up state, and the warming time may be, for example, 400ms or 800ms; alternatively, the acknowledgement signal may be a 1-bit signal. Alternatively, the acknowledgement signal may be an ACK signal.

[0279] o If the UE receives the first signal, as shown in FIG. 5, the UE starts to monitor the PDCCH search space after the first slot after slot , wheretis the slot where the UE transmits the acknowledgement information and is the number of slots in a subframe when the subcarrier spacing (SCS) configuration is u, and u is the SCS configuration of the acknowledgement signal,wcan bew=0, orwmay be the number of slots when SCS configuration is 0 and / or be provided by high-layer parameters,w=0 if it is not provided by high-layer parameters,ris the switching time of BWP, and optionally,r=0;

[0280] In some embodiments, the monitoring of the PDCCH search space may be periodic monitoring according to the PDCCH search space set, and / or monitoring during the DRX on duration;

[0281] In an embodiment, the UE activates periodic monitoring or consecutive monitoring of the first signal based on a first condition, and / or the UE is indicated to perform the RRM measurement based on the second signal within the active duration. When the first condition is not met, the UE deactivates or does not perform monitoring of the first signal, and / or the UE performs RRM measurement based on SSB. The first condition may include a combination of one or more of:

[0282] o When the absolute value of the change or difference of the RSRP and / or RSRQ of SSB is less than and / or equal to a predefined or preconfigured threshold within a predefined and / or preconfigured period of time, it indicates that the UE is stationary or moving at a low speed, and the RRM measurement based on the second signal can meet the requirements;

[0283] o When the RSRP and / or RSRQ of SSB is greater than and / or equal to a predefined or preconfigured threshold within a predefined and / or preconfigured period of time, it indicates that the UE is in a certain coverage area, and the UE can perform RRM measurement based on the second signal;

[0284] o If the UE detects one or more DCI formats at the monitoring occasion of the PDCCH, the UE starts a predefined or preconfigured timer (such as a timer), and the UE decrements the value of the timer per time unit. If one or more DCI formats are detected again before the timer decrements to 0, the UE resets the timer. When the timer is decremented to 0, the periodic monitoring or consecutive monitoring of the first signal is activated, and / or the UE is instructed to measure the RRM based on the second signal within the active duration. At this time, because the current information traffic is sparse, it is more suitable for using the first signal to monitor whether there is data scheduling;

[0285] o The UE indicates a capability to receive and decode a first signal and / or a capability to perform RRM measurement based on a second signal;

[0286] o When the UE is configured with the first signal and / or the second signal through a high-layer parameter, the high-layer parameter may be an RRC parameter;

[0287] o After the UE receives the third signal.

[0288] The following will describe the activation or deactivation procedure for the operation related to the first signal or second signal by the UE when the UE is in an RRC inactive state or an RRC idle state.

[0289] In another embodiment, in the RRC inactive / idle state, the first signal and / or the second signal may be configured by SIB. When the UE is configured with the first signal and / or the second signal, if the RRC connection is released, after the UE receives the third signal for activating the monitoring procedure of the first signal, and / or when the first condition is met, the behavior of the UE may include one or more of:

[0290] o UE turns on the receiving module of low-power wake-up signal;

[0291] o UE periodically monitors the monitoring occasion of the first signal or monitors each configured monitoring occasion of the first signal until receiving the first signal;

[0292] o UE performs RRM measurement based on the second signal;

[0293] o The main radio of UE enters a sleep state;

[0294] o UE is not expected to monitor paging occasions. Optionally, the UE is not expected to monitor one or more paging occasions before receiving the first signal;

[0295] o UE is not expected to monitor the paging early indication, i.e. DCI format 2_7. Optionally, the UE is not expected to monitor one or more PEI occasions before receiving the first signal;

[0296] In some embodiments, in the RRC INACTIVE state, after the UE receives the first signal sent by the base station, the behavior of the UE may include one or more of:

[0297] o UE turns on the main radio.

[0298] o UE monitors paging early indication or paging occasion after a predefined and / or preconfigured time unit. In some embodiments, the paging occasion may have a definite association with the first signal, the definite association may be indicated by the information carried by the first signal or may be a fixed association; in some embodiments, if the only the change of system information is received by the UE, within a predefined and / or preconfigured time after receiving the change of system information or before the next PO, the UE turns on the receiving module of low-power wake-up signal, and / or periodically monitors the monitoring occasion of the first signal or monitors each configured monitoring occasion of the first signal, and / or performs RRM measurement based on the second signal when the first condition is met; this indicates that UE may perform RRM measurement based on SSB while monitoring the first signal. In some embodiments, if only the change of system information is received by the UE, within a predefined and / or preconfigured period of time after receiving the change of system information and / or before the next PO, the UE turns on the receiving module of low-power wake-up signal, and / or the UE periodically monitors the monitoring occasion of the first signal or monitors each configured monitoring occasion of the first signal, and / or performs RRM measurement based on the second signal, and / or judges whether the first condition is met. If the first condition is met, the UE starts the receiving module of the low-power wake-up signal, which indicates that the UE can only perform monitoring of the first signal and RRM measurement based on the second signal at the same time when the first condition is met;

[0299] o UE enters RRC connected state after a predefined and / or preconfigured time unit;

[0300] o UE performs RRM measurement based on SSB after a predefined and / or preconfigured time unit;

[0301] o UE turns off or deactivates the receiving module of low-power wake-up signal;

[0302] o UE does not need to perform RRM measurement based on the second signal.

[0303] Next, operations related to the first signal and / or the second signal for the UE when the UE is in the RRC connected state will be described.

[0304] In another embodiment, in the RRC connected state, the first signal can be configured by RRC. When the UE is configured with the first signal, by receiving the third signal, the UE may activate and / or deactivate the periodic monitoring or consecutive monitoring of the first signal, or periodically monitor or consecutively monitor the first signal. When the UE performs the periodic monitoring, the UE performs the monitoring of the first signal at the monitoring occasion of the first signal. The monitoring location of the monitoring occasion of the first signal may include a combination of one or more of:

[0305] o The start location or end location of each monitoring occasion of the first signal can be determined by the start time unit of drx-onDurationTimer and a preconfigured or predefined offset. If a first signal is monitored by the UE within a monitoring occasion of the first signal, and / or the first signal instructs the UE to wake up and monitor the PDCCH in the next drx-onDurationTimer duration, the UE can monitor the PDCCH in the duration of the next N drx-onDurationTimers of DRX cycles without monitoring the monitoring occasions of the first signal associated with the N DRX-OndurationTimers, from the next drx-onDurationTimer. Where N is a positive integer; Such way is in consideration that high-layer data packets can be packaged into multiple physical layer transport blocks and sent to the UE in a centralized way, when the UE monitors one PDCCH, there may be multiple PDCCHs scheduling other transport blocks (TBs) subsequently, and the power consumption of the UE can be reduced by not monitoring the monitoring occasions of the first signal associated with the N drx-onDurationTimers. The example process is shown in FIG. 6.

[0306] o The start location or end location of each monitoring occasion of the first signal can be determined by the start time unit of drx-OndurationTimer relative to long drx and a preconfigured or predefined offset; if a first signal is monitored by the UE within a monitoring occasion of the first signal, and / or the first signal instructs the UE to wake up and monitor PDCCH during the drx-OndurationTimer duration of the next long drx, the UE should monitor PDCCH during the drx-onDurationTimers of the next N long drxes, and not monitor the monitoring occasions of the first signal associated with drx-onDurationTimers of the N long drxes, from the drx-onDurationTimer of the next long drx.

[0307] In some embodiments, the N may be a parameter value (pre-) configured or predefined by the base station equipment and / or reported by the UE according to its own processing capability.

[0308] The RRM measurement reporting method of UE will be described below.

[0309] When performing RRM measurement reporting, the UE can indicate whether the measurement result of RRM is based on SSB measurement or based on the second signal measurement through the indication information. The indication information may be 1-bit indication information.

[0310] For example, when the indication information is '1', it indicates that the measurement result of RRM is based on SSB measurement, and when the indication information is '0', it indicates that the measurement result of RRM is based on the second signal measurement. For another example, when the indication information is '1', it indicates that the measurement result of RRM is based on SSB measurement, and when the indication information is '0', it indicates that the measurement result of RRM is not based on SSB measurement. For another example, when the indication information is '1', it indicates that the measurement result of RRM is based on the second signal, and when the indication information is '0', it indicates that the measurement result of RRM is not based on the second signal.

[0311] In an embodiment, if the UE meets the second condition, the periodic monitoring or consecutive monitoring of the first signal is activated, and / or the UE performs RRM measurement based on the second signal within the active duration, and / or the UE performs relaxed RRM measurement based on the SSB of the serving cell and / or the neighbor cell. If the second condition is not met, the UE deactivates or does not perform monitoring of the first signal, and / or the UE performs RRM measurement based on SSB. The second condition may include a combination of one or more of:

[0312] o When the absolute value of the change or difference of the RSRP of SSB of the serving cell is less than and / or equal to a predefined or preconfigured threshold, and / or the absolute value of the change or difference of the RSRQ is less than and / or equal to a predefined or preconfigured threshold, within a predefined and / or preconfigured period of time; or if the absolute value of the change or difference of the reference cell selection reception level value (cell selection RX level value, Srxlev) calculated based on the RSRP of SSB of the serving cell is less than and / or equal to a predefined or preconfigured threshold, and / or when the absolute value of the change or difference of cell selection quality value (Squal) calculated by RSRQ is less than and / or equal to a predefined or preconfigured threshold, it indicates that the UE is stationary or moving at a low speed, and the UE may perform RRM measurement based on the second signal, and the main radio of the UE may perform relaxed RRM measurement based on the SSB of the serving cell and / or the neighbor cell;

[0313] o When the RSRP based on SSB of the serving cell is greater than and / or equal to a predefined or preconfigured threshold, and / or the RSRQ is greater than and / or equal to a predefined or preconfigured threshold; or if the cell selection reception level value (cell selection RX level value, Srxlev) calculated based on the RSRP of SSB of the serving cell is greater than and / or equal to a predefined or preconfigured threshold, and / or the cell selection quality value (Squal) calculated by RSRQ is greater than and / or equal to a predefined or preconfigured threshold; at this time, it indicates that the UE is in a certain coverage range, in which the UE can perform RRM measurement based on the second signal, and the main radio of the UE can perform relaxed RRM measurement based on the SSB of the serving cell and / or the neighbor cell;

[0314] o When the cell reselection principle is not satisfied, for example, if the RSRP measured based on SSB of a neighbor cell is less than and / or not greater than a predefined or preconfigured threshold TH1 and / or the RSRQ measured based on SSB of the neighbor cell is less than and / or not greater than a predefined or preconfigured threshold TH2, and / or if the reference cell selection reception level value (cell selection RX level value, Srxlev) calculated based on the RSRP of SSB of the neighbor cell is less than and / or not greater than a predefined or preconfigured threshold TH3 and / or the cell selection quality value (Squal) calculated by RSRQ is less than and / or not greater than a predefined or preconfigured threshold TH4. At this time, it is for the reason that the UE should handover to the neighbor cell if the measurement result of the neighbor cell is better than the measurement result of the serving cell, considering that LR does not support the measurement of the neighbor cell and the UE should perform cell handover instead of monitoring the wake-up signal of the serving cell at this time, the UE should not start or activate the periodic monitoring or consecutive monitoring of the first signal.

[0315] o When the synchronization accuracy error determined based on the second signal is within the CP range, for example, when the synchronization accuracy determined based on the second signal satisfies the synchronization accuracy of the first signal reception; the synchronization accuracy may be the synchronization accuracy between the LR and the network;

[0316] o the preconfigured thresholds can be configured by SIB1.

[0317] o TH1, TH2, TH3 and TH4 are positive numbers greater than 0.

[0318] In an embodiment, if the UE satisfies the second condition and the third condition at the same time, the UE may perform RRM measurement of the serving cell only based on the second signal, not perform RRM measurement of the serving cell based on the SSB of the serving cell, and / or not perform RRM measurement of the serving cell based on the SSB of the neighbor cell. This operation is more suitable for UE in the center of the cell. The third condition may include a combination of one or more of:

[0319] o when the RSRP based on SSB of the serving cell is greater than and / or equal to a predefined or preconfigured threshold TH5, and / or the RSRQ is greater than and / or equal to a predefined or preconfigured threshold TH6, or if the reference cell selection reception level value (cell Selection RX level value, Srxlev) is greater than and / or equal to a predefined or preconfigured threshold TH7, and / or the cell selection quality value (Squal) calculated by RSRQ is greater than and / or equal to a predefined or preconfigured threshold TH8; optionally, the RSRP and / or RSRQ of the SSB based on the serving cell can be obtained through relaxed RRM measurement;

[0320] o When the RSRP based on the second signal is greater than and / or equal to a predefined or preconfigured threshold TH9, and / or the RSRQ is greater than and / or equal to a predefined or preconfigured threshold TH10, or if the reference cell selection reception level value (cell selection RX level value, Srxlev) is greater than and / or equal to a predefined or preconfigured threshold TH11, and / or the cell selection quality value (Squal) calculated by RSRQ is greater than and / or equal to a predefined or preconfigured threshold TH12;

[0321] o the preconfigured threshold can be configured by SIB1.

[0322] o TH5, TH6, TH7, TH8, TH9, TH10, TH11 and TH12 are positive numbers greater than 0.

[0323] o In an embodiment, if the UE meets a fourth condition, the UE stops monitoring the first signal, and / or the UE no longer performs RRM measurement based on the second signal, and / or the UE performs relaxed RRM measurement based on the SSB of the serving cell and / or a neighbor cell. If the fourth condition is not met, if the second condition is met, the UE may activate or enable the monitoring of the first signal, and / or the UE may perform RRM measurement based on the second signal, and / or the UE may perform relaxed RRM measurement based on the SSB of the serving cell and / or the neighbor cell. If the fourth condition is not met, and if the UE meets the second condition and the third condition at the same time, the UE may perform the RRM measurement of the serving cell only based on the second signal, not perform the RRM measurement of the serving cell based on the SSB of the serving cell, and / or not perform the RRM measurement of the serving cell based on the SSB of the neighbor cell. The fourth condition may include one or more of: when the RSRP based on the second signal is less than and / or not greater than a predefined or preconfigured threshold TH13, and / or when the RSRQ is less than and / or not greater than a predefined or preconfigured threshold TH14, or if the reference cell selection reception level value (cell selection RX level value, Srxlev) is less than and / or not greater than a predefined or preconfigured threshold TH15, and / or the cell selection quality value (Squal) calculated by RSRQ is less than and / or not greater than a predefined or preconfigured threshold TH16;

[0324] o When the RSRP based on SSB of the serving cell is less than and / or not greater than a predefined or preconfigured threshold TH17, and / or the RSRQ is less than and / or not greater than a predefined or preconfigured threshold TH18, or if the reference cell selection reception level value (cell Selection RX level value, Srxlev) is less than and / or not greater than a predefined or preconfigured threshold TH19, and / or the cell selection quality value (Squal) calculated by RSRQ is less than and / or not greater than a predefined or preconfigured threshold TH20; optionally, the RSRP and / or RSRQ based on the SSB of the serving cell can be obtained through relaxed RRM measurement;

[0325] o When the RSRP based on SSB of a neighbor cell is greater than and / or not less than a predefined or preconfigured threshold TH21, and / or the RSRQ is greater than and / or not less than a predefined or preconfigured threshold TH22, or if the reference cell selection reception level value (cell Selection RX level value, Srxlev) is greater than and / or not less than a predefined or preconfigured threshold TH23, and / or the cell selection quality value (Squal) calculated by RSRQ is greater than and / or not less than a predefined or preconfigured threshold TH24; optionally, the RSRP and / or RSRQ based on SSB of a neighbor cell can be obtained through relaxed RRM measurement; or the RSRP and / or RSRQ based on SSB of a neighbor cell may be obtained by RRM measurement performed at every preconfigured or predefined RRM measurement occasion or window;

[0326] o the preconfigured threshold can be configured by SIB1.

[0327] o TH13, TH14, TH15, TH16, TH17, TH18, TH19, TH20, TH21, TH22, TH23 and TH24 are positive numbers greater than 0.

[0328] Through the above method, the base station and the UE can have a consistent understanding of the operations related to the first signal and / or the second signal, thereby improving the communication performance. In addition, by using the generation sequence of the first signal or the second signal to indicate part of the information and using the payload of the time domain sequence of the first signal or the second signal to carry information, the number and types of information that can be transmitted by the first signal or the second signal can be increased, and the UE can also obtain the required information more quickly. On the other hand, by using signals or conditions to activate or deactivate operations related to the first signal or the second signal, the power consumption of the UE can be further reduced and the power efficiency can be improved.

[0329] FIG. 7 shows a block diagram of a hardware structure of a communication device 700 according to some embodiments of the present disclosure. The communication device 700 shown in FIG. 7 can be used to implement any method performed by a UE or a base station according to the principles of the present disclosure.

[0330] Referring to FIG. 7, a communication device 700 according to an embodiment of the present disclosure includes a transceiver 701 and a controller 702. Optionally, the communication device 700 may further include a memory (not shown). The transceiver 701 can transmit signals or data, or receive signals or data. The controller 702 may be coupled with the transceiver 701 and the memory, and control the operations of the transceiver 701 and the memory. Computer executable instructions are stored in the memory, which, when performed by the controller 702, cause at least one method corresponding to the above embodiments of the present disclosure to be performed.

[0331] The above is only an exemplary embodiment of this disclosure, and it is not used to limit this disclosure. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of this disclosure should be included in the scope of protection of this disclosure.

[0332] It will be understood by those skilled in the art that this application may include devices for performing one or more of the operations described in this application. These devices can be specially designed and manufactured for required purposes, or they can also include known devices in general-purpose computers. These devices have computer programs stored therein, which are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., a computer) readable medium including but not limited to any type of disk (including floppy disk, hard disk, optical disk, CD-ROM, and magneto-optical disk), ROM(Read-Only Memory, Read-only memory), RAM(Random Access Memory), EPROM (erasable programmable read-only memory), EEPROM (electrically erasable programmable read-only memory), flash memory, magnetic card or optical card. That is, a readable medium includes any medium in which information is stored or transmitted by a device (e.g., a computer) in a readable form.

[0333] It will be understood by those skilled in the art that each block in these structural diagrams and / or block diagrams and / or flow diagrams and combinations of blocks in these structural diagrams and / or block diagrams and / or flow diagrams can be implemented by computer program instructions. It can be understood by those skilled in the art that these computer program instructions can be provided to a general-purpose computer, a specialized computer or a processor of other programmable data processing methods for implementation, so that the scheme specified in the block or blocks of the structure diagram and / or block diagram and / or flow diagram of the present disclosure can be performed by the processor of the computer or other programmable data processing methods.

[0334] Those skilled in the art can understand that the steps, measures and schemes in various operations, methods and processes that have been discussed in this disclosure can be alternated, changed, combined or deleted. Further, other steps, measures and schemes in various operations, methods and processes already discussed in this disclosure can also be alternated, changed, rearranged, decomposed, combined or deleted. Further, steps, measures and schemes in various operations, methods and flows disclosed in this disclosure in the prior art can also be alternated, changed, rearranged, decomposed, combined or deleted.

[0335] What has been described above is only part of the implementation of the present disclosure. It should be pointed out that those skilled in the art can make some improvements and embellishments without departing from the principles of the present disclosure, and these improvements and embellishments should also be regarded as the protection scope of the present disclosure.

Claims

1.A method performed by user equipment (UE) in a communication system, comprising:receiving, from a base station, first configuration information for a first signal and second configuration information for a second signal;performing a first operation based on at least one of the first configuration information and the second configuration information based on receiving a third signal from the base station or determining that a first condition is satisfied,wherein:the first operation includes at least one of monitoring the first signal and radio resource management (RRM) measurement based on the second signal,the first signal comprises a low power signal for waking up the UE, andthe second signal comprises a low power signal for at least one of synchronization and RRM measurement.2.The method of claim 1, wherein the third signal includes indication information for at least one of:indicating activating the first operation,indicating the UE to perform periodic monitoring or consecutive monitoring based on the first signal,indicating the UE to perform RRM measurement based on the second signal.3.The method of claim 1, wherein the first operation further comprises at least one of:not monitoring physical downlink control channel (PDCCH) search space or downlink control information (DCI) with cyclic redundancy prefix (CRC) scrambled by power-saving radio network temporary identifier (PS_RNTI),not monitoring paging occasion or paging early indication,no longer performing RRM measurement based on synchronization signal and physical broadcast channel block (SSB),starting a receiving module for wake-up signal;a main radio entering a sleep state;transmitting a first acknowledgement signal for the third signal within a second time after receiving the third signal and before the main radio enters a sleep state;the UE not expecting to monitor at least one of PDCCH search space set and paging occasions;the UE not expecting to monitor DCI with CRC scrambled by PS_RNTI, in RRC CONNECTED state;the UE not expecting to monitor paging early indication, in RRC INACTIVE state.4.The method of claim 2, wherein the third signal comprises a DCI message, and the DCI message comprises at least one of:identification information for indicating a DCI format,feedback time information, to indicate time information from receiving the third signal to transmitting a first acknowledgement signal for the third signal by the UE,bandwidth part (BWP) related information for at least one of the first signal and the second signal,time domain resource allocation information of the first acknowledgement signal,frequency domain resource allocation information of the first acknowledgement signal.5.The method of claim 3, wherein the first acknowledgement signal is used to indicate at least one of:the UE has activated the first operation,the UE has deactivated the main radio,the UE no longer monitors PDCCH search space or DCI with the CRC scrambled by PS_RNTI,the UE no longer monitors paging occasion or paging early indication,the UE no longer performs RRM measurement based on SSB.6.The method of claim 3, wherein the UE activates or deactivates the first operation after a first time unit from transmitting the first acknowledgement signal, wherein the first time unit is related to at least one of SCS and BWP switch time of the first acknowledgement signal.7.The method of claim 1, wherein the first condition comprises at least one of:a change or difference of RSRP of SSB within a third time is less than or equal to a first threshold;a change or difference of RSRQ of SSB within a fourth time is less than or equal to a second threshold;RSRP of SSB is greater than or equal to a third threshold;RSRQ of SSB is greater than or equal to a fourth threshold;a value of a first timer is decremented to 0, wherein the first timer is started when the UE detects one or more DCI formats at a PDCCH monitoring occasion, and the value of the timer is decremented per the time unit, if the UE detects one or more DCI formats again before the first timer decrements to 0, the UE resets the first timer;the UE receives the third signal.8.The method of claim 1, wherein, in case that the third signal is received from the base station or the first condition is determined to be satisfied, the method further comprises:performing a second operation based on the first signal, the second operation including at least one of:turning on the main radio,in RRC CONNECTED state, the UE monitors PDCCH search space or DCI with CRC scrambled by PS_RNTI after a fifth time,in RRC INACTIVE or IDLE state, the UE monitors a paging early indication or a paging occasion after a sixth time,in RRC INACTIVE or IDLE state, the UE enters RRC CONNECTED state after a seventh time,the UE performs RRM measurement based on SSB after an eighth time,the UE turns off or deactivates a receiving module of the wake-up signal,the UE is not expected to monitor a monitoring occasion of the first signal from the next monitoring occasion of the first signal,the UE is not expected to perform RRM measurement based on the second signal.9.The method of claim 8, wherein there is an association between the paging occasion and the first signal, and the association is indicated by the information carried by the first signal or is a predetermined association.10.The method of claim 8, wherein:when the UE monitors a PDCCH search space or paging occasion, the UE does not monitor the first signal;when the UE monitors at least one of a monitoring occasion and PEI occasion of DCI with CRC scrambled by PS_RNTI, the UE does not monitor the first signal;within a ninth time after receiving the first signal, the UE transmits a second acknowledgement signal for the first signal.11.The method of claim 10, wherein the second acknowledgement signal is used to indicate at least one of:the UE has activated the main radio,the UE has deactivated the receiving module of the wake-up signal,the UE starts to perform monitoring of a PDCCH search space or DCI with CRC scrambled by PS_RNTI,the UE performs monitoring of paging occasion or paging early indication,the UE performs RRM measurement based on SSB,the UE deactivates a monitoring occasion of the first signal,the UE deactivates RRM measurement based on the second signal.12.The method of claim 10, wherein the UE starts monitoring the PDCCH search space after a second time unit from transmitting the second acknowledgement signal, wherein the second time unit is related to at least one of SCS and BWP switch time of the second acknowledgement signal.13.A method performed by a base station in a communication system, comprising:transmitting a first sequence and a generation sequence of a first signal to a user equipment (UE), wherein the first sequence indicates bit information of the first signal, and the first sequence and the generation sequence of the first signal are used by the UE to acquire information bits carried by the first signal; andtransmitting a second sequence and a generation sequence of a second signal to the UE, wherein the second sequence indicates bit information of the second signal, and the second sequence and the generation sequence of the second signal are used by the UE to acquire information bits carried by the second signal.14.A user equipment (UE) in a communication system, comprising:a transceiver; anda controller configured to:receive, from a base station, first configuration information for a first signal and second configuration information for a second signal;perform a first operation based on at least one of the first configuration information and the second configuration information based on receiving a third signal from the base station or determining that a first condition is satisfied,wherein:the first operation includes at least one of monitoring the first signal and radio resource management (RRM) measurement based on the second signal,the first signal comprises a low power signal for waking up the UE, andthe second signal comprises a low power signal for at least one of synchronization and RRM measurement.15.A base station in a communication system, comprising:a transceiver; anda controller configured to:transmit a first sequence and a generation sequence of a first signal to a user equipment (UE), wherein the first sequence indicates bit information of the first signal, and the first sequence and the generation sequence of the first signal are used by the UE to acquire information bits carried by the first signal; andtransmit a second sequence and a generation sequence of a second signal to the UE, wherein the second sequence indicates bit information of the second signal, and the second sequence and the generation sequence of the second signal are used by the UE to acquire information bits carried by the second signal.

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