User equipment and method for power saving during RRC inactivity or RRC idle

Abstract

To provide user equipment (UE) and a method for power saving in one of a radio resource control (RRC)_INACTIVE state and an RRC_IDLE state.SOLUTION: A method in a wireless communication system includes the steps of: receiving a first configuration from a base station (BS) indicating a paging search space; receiving a second configuration from the BS indicating a search space for monitoring a specific indication; monitoring a physical downlink control channel (PDCCH) within the search space to detect the specific indication; and determining, on the basis of the specific indication, whether to monitor a paging occasion (PO) determined according to the paging search space.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] [Field] The present disclosure relates to wireless communications, and more particularly to power saving operation in a radio resource control (RRC) inactive or RRC idle state. [Background technology]

[0002] Abbreviations used in this disclosure include: Abbreviation Full Name 5GC 5G Core AMF Access and Mobility Management Functions AS access layer BA Bandwidth Adaptation BCCH Broadcast Control Channel BS base station BWP Bandwidth Portion CMAS Commercial Mobile Alarm Service CN Core Network CRC Cyclic Redundancy Check C-RNTI Cell Radio Network Temporary Identifier CSI-RS Channel State Information Reference Signal DCI Downlink Control Information DCI with CRC scrambled by DCP PS-RNTI DL downlink DRX Intermittent Reception eMBB Enhanced Mobile Broadband eMTC Enhanced Machine Type Communication EPC Evolved Packet Core ETWS Earthquake and Tsunami Warning System EUTRA Evolved Universal Terrestrial Radio Access FR Frequency Range HARQ Hybrid Automatic Repeat Request ID Identifier IE Information Elements I-RNTI Inactive RNTI LTE Long Term Evolution MAC Media Access Control MCG Master Cell Group MIB Master Information Block MIMO Multiple Input Multiple Output MME Mobility Management Entity MO (PDCCH) Monitoring Opportunity MSG Message MTC Machine Type Communication NAS non-access layer NB-IoT Narrowband Internet of Things NG-RAN Next Generation Radio Access Network NR New Radio NR-U License-free New Radio NW Network OFDM Orthogonal Frequency Division Multiplexing PCell Primary Cell PCCH Paging Control Channel PDCCH Physical Downlink Control Channel PDCP Packet Data Convergence Protocol PDSCH Physical Downlink Shared Channel PDU Protocol Data Unit PEI Paging Early Indication PF Paging Frame PHY physical PO Paging Opportunity PRACH Physical Random Access Channel P-RNTI Paging RNTI PSCell Primary Secondary Cell PS-RNTI Power saving RNTI PUCCH Physical Uplink Control Channel PUSCH Physical Uplink Shared Channel PWS Public Warning System QoS Quality of Service RA Random Access RACH Random Access Channel RAN Radio Access Network RAT Radio Access Technology Rel Release RLC Radio Link Control RNA RAN-based notification area RNTI Radio Network Temporary Identifier RRC Radio Resource Control RRM Radio Resource Management RSRP reference signal received power RTT Round Trip Time SA Standalone SCell Secondary Cell SCG Secondary Cell Group SDAP Service Data Adaptation Protocol SFN System Frame Number SI System Information SIB System Information Block SINR Signal to Interference Plus Noise Ratio S-NSSAI Single Network Slice Selection Assistance Information SRB Signaling Radio Bearer SRS Sounding Reference Signal SSB sync signal block S-TMSI SAE Temporary Mobile Subscriber Identifier TRP Transmitting / Receiving Point TS Technical Specifications UE User Equipment UL uplink URLLC: Ultra-reliable, low-latency communication WUS Wake-up signal. Summary of the Invention [Problem to be solved by the invention]

[0003] Various efforts have been made to improve different aspects of wireless communication for cellular wireless communication systems, such as 5G NR, by improving data rates, latency, reliability, and mobility. 5G NR systems are designed to provide flexibility and configurability to optimize network services and types for various use cases, such as enhanced mobile broadband (eMBB), massive machine-type communications (mMTC), and ultra-reliable low-latency communications (URLLC). However, as demand for wireless access continues to increase, there is a need for further improvements in the art. [Means for solving the problem]

[0004] The present disclosure relates to power saving operation in the RRC INACTIVE state or the RRC IDLE state.

[0005] According to one aspect of the present disclosure, a method performed by a UE for power saving in one of an RRC_INACTIVE state and an RRC_IDLE state is provided, the method including receiving a first configuration from a base station (BS) indicating a paging search space, receiving a second configuration from the BS indicating a search space for monitoring a specific indication, monitoring a physical downlink control channel (PDCCH) within the search space to detect the specific indication, determining whether to monitor one or more paging occasions (POs) based on the specific indication, where the one or more POs are determined according to the paging search space, determining whether to monitor the one or more POs based on whether the specific indication is successfully detected within the search space, monitoring the one or more POs if it is determined that the specific indication is successfully detected within the search space, and skipping monitoring the one or more POs if it is determined that the specific indication is not successfully detected within the search space.

[0006] According to another aspect of the present disclosure, a UE for power saving in one of an RRC_INACTIVE state and an RRC_IDLE state is provided. The UE includes: a processor; and a memory coupled to the processor, the memory storing a computer-executable program that, when executed by the processor, causes the processor to perform: receiving, from a BS, a first configuration indicating a paging search space; receiving, from a BS, a second configuration indicating a search space for monitoring a particular indication; monitoring a PDCCH within the search space to detect the particular indication; determining whether to monitor one or more POs based on the particular indication, the one or more POs determined according to the paging search space; determining whether to monitor the one or more POs based on whether the particular indication is successfully detected within the search space; monitoring the one or more POs if it is determined that the particular indication is successfully detected within the search space; and skipping monitoring the one or more POs if it is determined that the particular indication is not successfully detected within the search space. [Brief explanation of the drawings]

[0007] Aspects of the present disclosure will be best understood from the following detailed disclosure when read in conjunction with the accompanying drawings, in which: Various features are not drawn to scale, and the dimensions of various features may be arbitrarily increased or decreased for clarity of discussion. [Figure 1] FIG. 1 illustrates a paging process according to an example embodiment of the present disclosure. [Figure 2] FIG. 2 illustrates a DRX mechanism for paging monitoring according to an example embodiment of the present disclosure. [Figure 3] FIG. 3 illustrates a power saving scheme employing DCP according to an example embodiment of the present disclosure. [Figure 4]FIG. 4 illustrates a timing diagram of new signaling / indications (eg, PEI) associated with one PO / PF / DRX cycle according to an example embodiment of the present disclosure. [Figure 5] FIG. 5 illustrates a timing diagram of new signaling / indications (eg, PEI) associated with multiple PO / PF / DRX cycles according to an example embodiment of the present disclosure. [Figure 6] FIG. 6 illustrates a timing diagram of new signaling / indication (eg, PEI) associated with valid timers according to an example embodiment of the present disclosure. [Figure 7] FIG. 7 illustrates a recurrence mechanism for new signaling / indication (eg, PEI) according to an example embodiment of the present disclosure. [Figure 8] FIG. 8 illustrates a method performed by a UE to save power while in one of the RRC_INACTIVE and RRC_IDLE states according to an example embodiment of the present disclosure. [Figure 9] FIG. 9 is a block diagram illustrating a node for wireless communication according to an example embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0008] The following contains specific information related to embodiments of the present disclosure. The drawings and their accompanying detailed disclosure are directed to embodiments only. However, the present disclosure is not limited to these embodiments. Other variations and embodiments of the present disclosure will be apparent to those skilled in the art.

[0009] It should be noted that, unless otherwise noted, the same or corresponding parts among the drawings are designated by the same or corresponding reference numerals. Furthermore, the drawings and illustrations in this disclosure are generally not to scale and are not intended to correspond to actual relative dimensions.

[0010] For purposes of consistency and ease of understanding, similar features may be identified by the same numerals in the figures (although in some instances not shown), however, features in different embodiments may differ in other respects and should not be narrowly limited to those shown in the figures.

[0011] The phrases "in one embodiment" or "in some embodiments" may each refer to one or more of the same or different embodiments. The term "coupled" is defined as directly or indirectly connected through intervening components, and is not necessarily limited to a physical connection. The term "comprising" means "including, but not necessarily limited to," and specifically indicates an open-ended inclusion or membership in such disclosed combinations, groups, series, or equivalents. The phrase "at least one of A, B, and C" or "at least one of: A, B, and C" means "A only, or B only, or C only, or any combination of A, B, and C."

[0012] The terms "system" and "network" may be used interchangeably. The term "and / or" is only an association relationship to describe associated objects and indicates that a three-way relationship may exist, such as A and / or B may indicate that A exists alone, that A and B exist simultaneously, or that B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0013] For purposes of explanation and not limitation, specific details are set forth, such as functional entities, techniques, protocols, and standards, to provide an understanding of the disclosed technology. In other instances, detailed disclosures of well-known methods, techniques, systems, and architectures are omitted so as not to obscure the present disclosure with unnecessary detail.

[0014] Those skilled in the art will readily recognize that any network function or algorithm disclosed may be implemented by hardware, software, or a combination of software and hardware. The disclosed functions may correspond to modules that may be software, hardware, firmware, or any combination thereof.

[0015] Software embodiments may include computer-executable instructions stored on a computer-readable medium, such as a memory or other type of storage device. One or more microprocessors or general-purpose computers with communications processing capabilities can be programmed with the corresponding executable instructions to perform the disclosed network functions or algorithms.

[0016] The microprocessor or general-purpose computer may include the use of an application-specific integrated circuit (ASIC), a programmable logic array, and / or one or more digital signal processors (DSPs). While some of the disclosed embodiments are directed to software installed and executed on computer hardware, alternative embodiments implemented as firmware, hardware, or a combination of hardware and software are well within the scope of this disclosure. Computer-readable media include, but are not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), flash memory, compact disc read-only memory (CD-ROM), magnetic cassette, magnetic tape, magnetic disk storage media, or any other equivalent medium capable of storing computer-readable instructions.

[0017] A wireless communication network architecture, such as a Long Term Evolution (LTE) system, an LTE-Advanced (LTE-A) system, an LTE-Advanced Pro system, or a 5G NR Radio Access Network (RAN), typically includes at least one base station (BS), at least one UE, and one or more optional network elements that provide connectivity within the network. The UE communicates with a network, such as a Core Network (CN), an Evolved Packet Core (EPC) network, an Evolved Universal Terrestrial RAN (E-UTRAN), a 5G Core (5GC), or the Internet, via the RAN established by the one or more BSs.

[0018] A UE may include, but is not limited to, a mobile station, a mobile terminal or device, or a user communication wireless terminal. A UE may be a portable wireless device, including, but not limited to, a mobile phone, a tablet, a wearable device, a sensor, a vehicle, or a personal digital assistant (PDA) with wireless communication capabilities. The UE is configured to send and receive signals over the air interface with one or more cells in the RAN.

[0019] The BS may be configured to provide communication services according to at least one radio access technology (RAT), such as Worldwide Interoperability for Microwave Access (WiMAX), Global System for Mobile Communications (GSM), often denoted as 2G, GSM Enhanced Data Rates for Mobile Communications (EDGE) RAN (GERAN) for GSM Evolution, General Packet Radio Service (GPRS), Universal Mobile Telecommunications System (UMTS) based on basic wideband code division multiple access (W-CDMA) and often referred to as 3G, High Speed ​​Packet Access (HSPA), LTE, LTE-A, evolved LTE (eLTE), which is LTE related to 5GC, NR (often denoted as 5G), and / or LTE-A Pro. However, the scope of this disclosure is not limited to these protocols.

[0020] A BS may include, but is not limited to, a Node B (NB) in UMTS, an Evolved Node B (eNB) in LTE or LTE-A, a Radio Network Controller (RNC) in UMTS, a BS Controller (BSC) in GSM / GERAN, an ng-eNB in ​​an Evolved Universal Terrestrial Radio Access (E-UTRA) BS associated with 5G-RAN, a Next Generation Node B (gNB) in 5G-RAN, or any other device capable of controlling radio communications and managing radio resources within a cell. A BS may serve one or more UEs over an air interface.

[0021] The BS is operable to provide radio coverage to a particular geographic area using multiple cells forming a RAN. The BS supports the operation of the cells, each operable to serve at least one UE within its radio coverage.

[0022] Each cell (often called a serving cell) provides services to serve one or more UEs within its radio coverage, such that each cell schedules DL and optionally UL resources to at least one UE within its radio coverage for DL ​​and optionally UL packet transmissions. A BS can communicate with one or more UEs in a wireless communication system via multiple cells.

[0023] A cell can allocate sidelink (SL) resources to support proximity services (ProSe) or vehicle-to-everything (V2X) services. Each cell can have a coverage area that overlaps with other cells.

[0024] In the case of Multi-RAT Dual Connectivity (MR-DC), a primary cell of a Master Cell Group (MCG) or a Secondary Cell Group (SCG) may be referred to as a Special Cell (SpCell). A Primary Cell (PCell) may refer to an SpCell of an MCG. A Primary SCG Cell (PSCell) may refer to an SpCell of an SCG. An MCG may refer to a group of serving cells associated with a Master Node (MN), including an SpCell and optionally one or more Secondary Cells (SCells). An SCG may refer to a group of serving cells associated with a Secondary Node (SN), including an SpCell and optionally one or more SCells.

[0025] As previously disclosed, the frame structure for NR supports flexible configuration to accommodate various next-generation (e.g., 5G) communication requirements, such as enhanced mobile broadband (eMBB), high-capacity machine-type communications (mMTC), and ultra-reliable low-latency communications (URLLC), while meeting high reliability, high data rate, and low-latency requirements. Orthogonal frequency division multiplexing (OFDM) technology in 3GPP may serve as a baseline for NR waveforms. Scalable OFDM numerology, such as adaptive subcarrier spacing, channel bandwidth, and cyclic prefix (CP), may also be used.

[0026] Two coding schemes, specifically low-density parity-check (LDPC) codes and polar codes, have been considered for NR. Coding scheme adaptation can be configured based on channel conditions and / or service applications.

[0027] At least the DL transmission data, guard period, and UL transmission data must be included in one NR frame transmission time interval (TTI). Also, each part of the DL transmission data, guard period, and UL transmission data must be configurable based on, for example, NR network dynamics. SL resources may be provided within an NR frame to support ProSe or V2X services.

[0028] Two or more of the following sentences, paragraphs, (sub)clause, points, acts, behaviors, terms, alternatives, aspects, examples or claims described in the invention below may be logically, reasonably and appropriately combined to form a specific method.

[0029] Any sentence, paragraph, (sub)clause, point, act, behavior, term, alternative, aspect, example, or claim described in the following invention can be implemented individually to form a specific method.

[0030] Any dependencies in this specification such as "based on," "more specifically," "preferably," "in one embodiment," "in one alternative," "in one example," "in one aspect," "in one embodiment," etc. are merely examples of possible implementations that do not limit a particular approach.

[0031] Examples of some selected terms are provided below.

[0032] User Equipment (UE): A UE may be referred to as a PHY / MAC / RLC / PDCP / SDAP entity. A PHY / MAC / RLC / PDCP / SDAP entity may be referred to as a UE.

[0033] Network (NW): The NW may be a network node, a TRP, a cell (e.g., an SpCell, a PCell, a PSCell, and / or an SCell), an eNB, a gNB, and / or a base station.

[0034] Serving cell: PCell, PSCell, or SCell. The serving cell may be an activated or deactivated serving cell.

[0035] Special Cell (SpCell): In case of dual connectivity operation, the term "special cell" refers to the PCell of the MCG or the PSCell of the SCG depending on whether the MAC entity is associated with the MCG or the SCG, respectively. Otherwise, the term "special cell" refers to the PCell. Special cells support PUCCH transmission and contention-based random access and are always activated.

[0036] Component Carrier (CC): A CC may be a PCell, a PSCell, and / or an SCell.

[0037] Network (NW), radio access network (RAN), cell, camped cell, serving cell, base station, gNB, eNB, and ng-eNB may be used interchangeably in this disclosure, and in some embodiments, some of these terms may refer to the same network entity.

[0038] The disclosed mechanisms may be applied to any RAT, including but not limited to NR, NR-U, LTE, E-UTRA connected to 5GC, LTE connected to 5GC, E-UTRA connected to EPC, and LTE connected to EPC.

[0039] The disclosed mechanisms may be applied to UEs in a public network or a private network (eg, a non-public network (NPN), a standalone NPN (SNPN), or a public network integrated NPN (PNI-NPN)).

[0040] The disclosed mechanisms can be used for licensed and / or unlicensed spectrum.

[0041] System information (SI) may refer to MIB, SIB1, and other SI. The smallest SI may include MIB and SIB1. Other SI may refer to SIB3, SIB4, SIB5, and other SIBs (e.g., SNPN-specific SIB, PNI-NPN-specific SIB, power saving-specific SIB). The UE may receive SI either via broadcast or unicast. In response to a UE system information request, the UE may receive the requested SI via broadcast or unicast.

[0042] Dedicated (RRC) signaling may refer to (but is not limited to) RRC messages. For example, an RRC (connection) setup request message, an RRC (connection) setup message, an RRC (connection) setup complete message, an RRC (connection) reconfiguration message, an RRC connection reconfiguration message with mobility control information, an RRC connection reconfiguration message without mobility control information therein, an RRC reconfiguration message with a setting using sync, an RRC reconfiguration message without a setting using sync therein, an RRC (connection) reconfiguration complete message, an RRC (connection) resume request message, an RRC (connection) resume message, an RRC (connection) resume complete message, an RRC (connection) re-establishment request message, an RRC (connection) re-establishment message, an RRC (connection) re-establishment complete message, an RRC (connection) reject message, an RRC (connection) release message, an RRC system information request message, a UE assistance information message (e.g., a UE assistance information NR message, a UE assistance information EUTRA message), a UE capability query message, a UE capability information message, a UE information request message, and a UE information response message.

[0043] The disclosed embodiments can be applied to RRC_CONNECTED UE, RRC_INACTIVE UE, and RRC_IDLE UE.

[0044] An RRC_CONNECTED UE may be configured with an active BWP with a common search space configured to monitor system information or paging.

[0045] In general, the disclosed mechanisms may be applied to PCells and UEs. In some embodiments, the proposed mechanisms may be applied for PSCells and UEs.

[0046] The DCI may refer to a PDCCH resource scrambled by (or addressed to) the RNTI. Alternatively, the embodiments relating to DCI may be applied to physical signals.

[0047] [Determination of paging monitoring opportunities as specified in 3GPP TS38.304] The PF and PO for paging are determined by the following formula: The SFN for the PF is determined by (SFN+PF_offset) mod T=(T div N)*(UE_ID mod N), The index (i_s)PO, which indicates the index of the PO, is determined by i_s=floor(UE_ID / N) mod Ns.

[0048] The PDCCH monitoring occasion for paging is determined according to pagingSearchSpace as specified in TS38.213 and, if configured as specified in TS38.331, additionally according to firstPDCCH-MonitoringOccasionOfPO and nrofPDCCH-MonitoringOccasionPerSSB-InPO. If SearchSpaceId=0 is configured for pagingSearchSpace, the PDCCH monitoring occasion for paging is the same as for RMSI as defined in clause 13 of TS38.213.

[0049] If SearchSpaceId=0 is configured for pagingSearchSpace, Ns is either 1 or 2. If Ns=1, there is only one PO starting from the first PDCCH monitoring opportunity for paging within the PF. If Ns=2, the PO is either the first half-frame structure (i_s=0) or the second half-frame structure (i_s=1) of the PF.

[0050] If a non-zero SearchSpaceId is set in pagingSearchSpace, the UE monitors the (i_s+1)th PO. PO is a set of "S*X" consecutive PDCCH monitoring opportunities, where "S" is the number of actual transmitted SSBs determined according to ssb-PositionsInBurst in SIB1, and X is nrofPDCCH-MonitoringOccasionPerSSB-InPO, if set, or equal to 1 otherwise. The "X*S+K"th PDCCH monitoring opportunity for paging in PO corresponds to the Kth transmitted SSB, where x=0, 1, ..., X-1, K=1, 2, ..., S. PDCCH monitoring opportunities for paging that do not overlap with UL symbols (determined according to tdd-UL-DL-ConfigurationCommon) are numbered consecutively from zero, starting from the first PDCCH monitoring opportunity for paging in PF. When firstPDCCH-MonitoringOccasionOfPO is present, the number of the starting PDCCH monitoring occasion for the (i_s+1)th PO is the (i_s+1)th value of the firstPDCCH-MonitoringOccasionOfPO parameter, otherwise it is equal to i_s*S*X. If X>1, when the UE detects a PDCCH transmission addressed to the P-RNTI in that PO, the UE is not required to monitor subsequent PDCCH monitoring occasions for this PO.

[0051] NOTE 1: A PO associated with a PF can start at the PF or after the PF.

[0052] NOTE 2: PDCCH monitoring opportunities for one PO can span multiple radio frames.

[0053] When a SearchSpaceId other than 0 is configured for paging-SearchSpace, the PDCCH monitoring occasions for a PO may span multiple periods of the paging search space.

[0054] For the calculation of PF and i_s above, the following parameters are used: T: UE DRX cycle (T is determined by the shortest UE-specific DRX value, if configured by RRC and / or higher layers, and the default DRX value broadcast in the system information. In RRC_IDLE state, if UE-specific DRX is not configured by higher layers, the default value is applied). Total number of paging frames in N:T Ns: Number of paging opportunities for the PF PF_offset: Offset for determining PF UE_ID:5G-S-TMSI mod 1024.

[0055] The parameters Ns, nAndPagingFrameOffset, nrofPDCCH-MonitoringOccasionPerSSB-InPO and the length of the default DRX cycle are signaled in SIB1. The values ​​of N and PF_offset are derived from the parameter nAndPagingFrameOffset as defined in TS38.331. The parameter first-PDCCH-MonitoringOccasionOfPO is signaled in SIB1 for paging in the initial DL BWP. In case of paging in a DL BWP other than the initial DL BWP, the parameter first-PDCCH-MonitoringOccasionOfPO is signaled in the corresponding BWP configuration.

[0056] If the UE does not have 5G-S-TMSI, for example, if the UE is not yet registered with the network, the UE uses UE_ID=0 as the default identity in the above PF and i_S formulas.

[0057] [Paging reception as specified in 3GPP TS38.331] The purpose of the paging procedure is to transmit paging information to UEs in RRC_IDLE or RRC_INACTIVE state.

[0058] The network initiates the paging procedure by sending a paging message at the UE's paging occasion as specified in TS38.304. The network can address multiple UEs in a paging message by including one PagingRecord for each UE.

[0059] Table 1 shows the procedure performed by the UE for receiving a paging message.

[0060] [Table 1] JPEG0007733775000002.jpg77169

[0061] [Short Message] Short messages may be transmitted on the PDCCH using the P-RNTI, with or without an associated paging message, using the short message field of DCI format 1_0 (see TS38.212).

[0062] Table 2 shows an example short message where bit 1 is the most significant bit.

[0063] [Table 2]

[0064] [Paging message specified in 3GPP TS 38.331] A paging message is used to notify one or more UEs.

[0065] Signaling Radio Bearer: N / A RLC-SAP:TM Logical channel: PCCH Direction: Network to UE.

[0066] Table 3 shows the data structure of a paging message as an example.

[0067] [Table 3] JPEG0007733775000005.jpg77169

[0068] The field accessType of the PagingRecord may indicate whether the paging message is originated for a PDU session from a non-3GPP access.

[0069] DCI scrambled by P-RNTI (which may be referred to as paging DCI) as specified in 3GPP TS38.212 The following information is transmitted by DCI format 1_0 with CRC scrambled by P-RNTI: - Short Message Indicator - 2 bits according to Table 7.3.1.2.1-1 in 3GPP TS 38.212.

[0070] - Short Message - 8 bits according to clause 6.5 of 3GPP TS38.331. If only scheduling information for paging is carried, this bit field is reserved.

[0071] - Frequency domain resource allocation -

[0072]

number

[0073] bit. If only short messages are carried, this bit field is reserved.

[0074]

number

[0075] is the size of CORESET0.

[0076] - Time domain resource allocation - 4 bits, as defined in 3GPP TS38.214 clause 5.1.2.1. If only short messages are carried, this bit field is reserved.

[0077] - Mapping to VRB to PRB - 1 bit according to Table 7.3.1.2.2-5. If only short messages are carried, this bit field is reserved.

[0078] - Modulation and coding scheme - 5 bits, as defined in 3GPP TS38.214 clause 5.1.3 using table 5.1.3.1-1. If only short messages are carried, this bit field is reserved.

[0079] - TB scaling - 2 bits as defined in 3GPP TS38.214 clause 5.1.3.2. If only short messages are carried, this bit field is reserved.

[0080] - Reserved bits - 8 bits for operation in cells with shared spectrum channel access; otherwise, 6 bits.

[0081] Table 4 shows an example of a short message indicator included in a DCI scrambled by a P-RNTI.

[0082] [Table 4]

[0083] Table 5 shows an example configuration for PDCCH monitoring occasions for paging (according to the paging search space) as specified in 3GPP TS38.331.

[0084] [Table 5]

[0085] [Power saving enhancements] User experience is key to the success of 5G / NR, not only in terms of experienced data rates and latency, but also, importantly, in terms of UE power consumption. Therefore, UE power saving enhancements are essential for the success of 5G / NR. Several power saving methods have been discussed, including power saving signaling / DCI as an extension to connected mode DRX (cDRX), additional adaptation to the maximum number of MIMO layers, SCell dormancy behavior and cross-slot scheduling as an extension to the BWP framework, RRM mitigation as an extension for idle / inactive mode power consumption, and UE assistance information.

[0086] However, additional enhancements are needed to address prominent issues of idle / inactive mode power consumption in NR standalone (SA) deployments, taking into account both eMBB UEs and reduced capability NR devices, connected mode power consumption with FR2 (i.e., frequencies above 6 GHz) deployments, and optimizing network utilization of UE assistance information.

[0087] 〔paging〕 Paging allows the network to reach a UE in RRC_IDLE or RRC_INACTIVE state via paging messages. Paging may also allow the network to notify a UE in RRC_IDLE, RRC_INACTIVE, or RRC_CONNECTED state of system information changes and ETWS / CMAS indications via short messages. Both paging messages and short messages are addressed using the P-RNTI on the PDCCH. Paging messages are transmitted on the PCCH, while short messages are transmitted directly on the PDCCH. A UE in "RRC_IDLE state" is also referred to as a UE in "RRC_IDLE" in this disclosure. Similarly, "in RRC_INACTIVE state" is also referred to as "in RRC_INACTIVE," and "in RRC_CONNECTED state" is also referred to as "in RRC_CONNECTED."

[0088] In RRC_IDLE, the UE can monitor the paging channel for CN-initiated paging, while in RRC_INACTIVE, the UE can also monitor the paging channel for RAN-initiated paging. The UE does not need to continuously monitor the paging channel, but a paging DRX is defined for a UE in RRC_IDLE or RRC_INACTIVE that only needs to monitor the paging channel for one paging occasion (PO) per DRX cycle. This is specified in TS38.304. The paging DRX cycle may be configured by the network as follows:

[0089] For CN initiated paging, the default cycle may be broadcast in the system information.

[0090] For CN-initiated paging, a UE-specific cycle may be configured via NAS signaling.

[0091] For RAN initiated paging, a UE-specific cycle may be configured via RRC signaling.

[0092] The UE may use the shortest of the applicable DRX cycles. In one embodiment, a UE in RRC_IDLE may use the shortest of the first two cycles associated with CN initiated paging, while a UE in RRC_INACTIVE may use the shortest of the three cycles mentioned above.

[0093] The PO of a UE is derived based on the UE ID, so the PO for CN-initiated paging may overlap with the PO for RAN-initiated paging. The number of different POs in a DRX cycle may be configurable via system information, and the network may distribute UEs to those POs based on their UE ID.

[0094] When in RRC_CONNECTED, the UE may monitor paging channels in any PO indicated in the system information for SI change indication and PWS notification. In the BA case, a UE in RRC_CONNECTED may only monitor paging channels on active BWPs for which a common search space is configured.

[0095] [DRX for paging] The UE may use DRX in RRC_IDLE or RRC_INACTIVE to reduce power consumption. The UE may monitor one PO per DRX cycle. A PO may be a set of PDCCH monitoring opportunities and may include multiple time units (e.g., slots, subframes, OFDM symbols, etc.) during which paging DCI may be transmitted, as specified in TS38.213. A paging frame (PF) is one radio frame and may include one or multiple POs or the start of a PO.

[0096] In multi-beam operation, the UE assumes that the same paging message and the same short message are repeated in all transmitted beams, and therefore the selection of the beam for receiving the paging message and the short message depends on the UE implementation. The paging message is the same for both RAN-initiated paging and CN-initiated paging.

[0097] In some embodiments, the UE may initiate an RRC connection resumption procedure upon receiving a RAN initiated paging. If the UE receives a CN initiated paging in the RRC_INACTIVE state, the UE may transition to the RRC_IDLE state and notify the NAS.

[0098] 〔problem〕 Paging may occur when the NW reaches the UE through a paging message and notifies the UE of changes in system information and / or ETWS / CMAS indications through a short message. FIG. 1 illustrates a paging process 100 according to an example embodiment of the present disclosure. The UE may monitor the PDCCH and receive a paging 102 transmitted via a DCI scrambled by the P-RNTI (e.g., paging DCI / DCI format 1_0). When the UE receives the paging 102, the UE may check the short message indicator 106 included in the DCI to identify whether a short message 108 carried in the DCI exists and whether scheduling information for the paging message 110 exists. An example bit value of the short message indicator 106 is shown in Table 2, previously disclosed. An example format of the short message 108 is shown in Table 4, previously disclosed. If the short message indicator 106 indicates that a paging message 110 exists, the UE may further receive the paging message 110 on the PDSCH based on the scheduling information indicated by the DCI. When the UE receives the paging message 110 during RRC_IDLE / RRC_INACTIVE, it may check whether the UE ID field included in the paging record 112 matches a UE ID, which may be assigned by a higher layer or may be the UE's stored RNTI. If the UE ID field included in the paging record 112 matches the UE ID, the UE knows that the NW wants to reach the UE, and the UE may perform some actions accordingly.

[0099] Furthermore, to reduce power consumption, a DRX mechanism may be applied for paging monitoring (i.e., PDCCH monitoring for paging). The UE does not need to continuously monitor the PDCCH. FIG. 2 illustrates a DRX mechanism for paging monitoring 200 according to an example embodiment of the present disclosure. The UE may be configured with a DRX cycle and several parameters for determining a PO. The UE may monitor only one PO per DRX cycle. In some cases (e.g., multi-beam operation, operation with shared spectrum channel access, etc.), the UE may monitor multiple PDCCH monitoring opportunities (referred to as "MOs" in this disclosure) in one PO. As shown in FIG. 2, the UE monitors PO1 202 in DRX cycle #1 and PO2 204 in DRX cycle #2. There is PF#1 in DRX cycle #1 and PF#2 in DRX cycle #2. The UE monitors four PDCCH monitoring opportunities, including MO1, MO2, MO3, and MO4, in PO1 202. In one embodiment, a PO may include S consecutive PDCCH monitoring opportunities, where S is the number of actually transmitted SSBs determined according to ssb-PositionsInBurst in SIB1. The Kth PDCCH monitoring opportunity for paging in a PO corresponds to the Kth transmitted SSB, where K is an integer. In one embodiment, the configuration related to the MO for paging may include at least one of the following IEs: pagingSearchSpace, firstPDCCH-MonitoringOccasionOfPO, and nrofPDCCH-MonitoringOccasionPerSSB-InPO.

[0100] However, even if the UE only needs to monitor the PDCCH monitoring occasions set by the NW, unnecessary PDCCH monitoring for paging (e.g., paging occasions) still exists to some extent. For example, the UE needs to periodically monitor each PO (and / or the corresponding MO within the PO) to attempt to receive any paging that may exist. However, paging for the UE may not be transmitted periodically. For example, paging may be transmitted only once every long period of time. Based on the current DRX mechanism, if there is no paging and / or if there is paging but it is not indicated for the UE, the UE will waste power to monitor the PO. More specifically, if the UE ID field included in the paging message does not match the UE ID, the UE may waste power receiving the corresponding paging message indicated by the paging DCI, which may be a false alarm. Embodiments for reducing unnecessary PDCCH monitoring for paging (e.g., on paging occasions) are disclosed below.

[0101] In NR, a power saving mechanism for RRC_CONNECTED was introduced (in the power saving work item). The power saving mechanism introduced a new indication: DCI with a CRC scrambled by the PS-RNTI (DCP). FIG. 3 illustrates a power saving scheme 300 employing a DCP according to an example embodiment of the present disclosure. The DCP 302 is used to indicate whether the UE is required to monitor the PDCCH during the next occurrence of the DRX on duration 304 within the DRX cycle. If the UE does not detect the DCP 302 on an active BWP, the UE does not monitor the PDCCH during the next occurrence of the DRX on duration 304 unless the UE is explicitly configured to do so in that case.

[0102] DCP is a specific DL signal to (dynamically) control the UE behavior in PDCCH monitoring. The advantage of DCP is to reduce unnecessary PDCCH monitoring. However, DCP is designed for connected mode DRX (C-DRX), and this mode is only used to reduce PDCCH monitoring in RRC_CONNECTED, but not to reduce PDCCH monitoring for paging (e.g., on paging occasions) in RRC_IDLE / RRC_INACTIVE.

[0103] As a result, in NR, a new signal / indication (e.g., Paging Early Indication) is needed to reduce unnecessary PDCCH monitoring for paging in RRC_IDLE / RRC_INACTIVE (e.g., on paging occasions). Embodiments of the new signal / indication (e.g., PEI) are disclosed below.

[0104] New signaling / indication (e.g., Paging Early Indication (PEI)) In NR, a new signaling / indication (e.g., PEI) may be needed to reduce unnecessary PDCCH monitoring for paging. The new signaling / indication may not be DCP in NR and / or WUS in LTE. The main function of the new signaling / indication (e.g., PEI) may be used to notify the UE when it can skip PDCCH monitoring occasions configured for paging (e.g., the UE does not need to monitor the PDCCH for paging). In one embodiment, the new signaling / indication (e.g., PEI) may indicate to the UE to skip monitoring one or more upcoming POs, where each PO may include one or more PDCCH monitoring opportunities. Meanwhile, the main function of the new signaling / indication (e.g., PEI) may be used to notify the UE when it should wake up to monitor PDCCH monitoring occasions configured for paging (e.g., the UE should monitor the PDCCH for paging). In one embodiment, the new signaling / indication (e.g., PEI) may indicate to the UE to monitor one or more upcoming POs, where each PO may include one or more PDCCH monitoring opportunities. In one embodiment, the new signaling / indication (e.g., PEI) may be combined and implemented as a single specific indication. The UE may determine whether to monitor one or more POs based on the new signaling / indication (e.g., PEI) received from the BS.

[0105] Embodiments in the present disclosure address problems including: How to set up new signaling / indications (e.g. PEI)

[0106] When should the UE monitor for new signaling / indications (e.g. PEI)?

[0107] What information can be included in the new signaling / indication (e.g. PEI)?

[0108] · UE behavior when receiving new signaling / indication (e.g. PEI).

[0109] How can we increase the reliability of new signaling / indications (e.g., PEI)?

[0110] How to handle new signaling / indications (e.g. PEI) in case of conflict with other resources.

[0111] How to handle cases where the UE misses new signaling / indication (e.g., PEI).

[0112] How to avoid monitoring new signaling / indications (e.g. PEI) too frequently Fallback mechanism for new signaling / indication (e.g. PEI) UE capability / UE assistance information for new signaling / indications (e.g., PEI) [New signaling / indication (e.g., PEI) settings] The new signaling / indication (e.g., PEI) may be cell-specific signaling, UE group-specific signaling, and / or UE-specific signaling. In one embodiment, one new signaling / indication (e.g., PEI) may be indicated to all UEs in a cell. In one embodiment, one new signaling / indication (e.g., PEI) may be indicated to a group of UEs in a cell. In one embodiment, one new signaling / indication (e.g., PEI) may be indicated to a specific UE. In one embodiment, the new signaling / indication (e.g., PEI) configuration (and / or parameters) may be configured by the RAN, NAS, or core network (CN). For example, the new signaling / indication (e.g., PEI) configuration (and / or parameters) may be RAN-level (e.g., RRC layer, MAC layer, PHY layer) signaling or NAS-level (e.g., NAS layer) signaling. If the new signaling / indication (e.g., PEI) setting (and / or parameter) is RAN level signaling, it may be configured in the UE by the serving cell (or gNB or eNB). If the new signaling / indication (e.g., PEI) setting (and / or parameter) is NAS level signaling, it may be configured in the UE by the CN (e.g., EPC, 5GC, particularly the MME of the EPC, particularly the AMF of the 5GC).

[0113] In one embodiment, the new signaling / indication (e.g., PEI) is cell-specific signaling, and the monitoring occasion (e.g., search space and / or associated control resource set) may be a common monitoring occasion (e.g., common search space and / or common resource control set) for all UEs in the same cell.

[0114] In one embodiment, the new signaling / indication (e.g., PEI) is UE group-specific signaling. The UE group-specific new signaling / indication (e.g., PEI) may indicate UE group information. The UE may be configured with one or more monitoring occasions (e.g., search spaces and / or associated control resource sets) for the UE group. Each monitoring occasion (e.g., search space and / or associated control resource set) may be associated with a UE group. Alternatively, the UE may have different RNTIs (or be configured with different RNTIs) to monitor different UE groups.

[0115] The NW may indicate to the UE which monitoring opportunities (for UE groups) to monitor based on some criteria. Alternatively, the UE may select one or more of the UE groups to monitor based on some criteria.

[0116] In one embodiment, the new signaling / indication (e.g., PEI) may indicate a UE group, such as a group ID, and the UE may determine whether to monitor the PO according to whether the UE is associated with the UE group.

[0117] In one embodiment, the UE group may be formed / determined based on at least one of the following elements / fields / information: UE ID. For example, the network can distribute UEs equally into several UE groups based on UE ID.

[0118] UE service type / characteristics, e.g., based on QoS or eMBB / URLLC / eMTC UE.

[0119] The UE's requested / supported slices (e.g., network slice, RAN slice), e.g., based on the UE's registered / authorized / supported S-NSSAIs, where an S-NSSAI can be associated with one slice.

[0120] UE capabilities. For example, UEs with reduced capabilities may be associated with a unique UE group.

[0121] UE assistance information, such as several UE preferences, such as a combination of several UE assistance information, which may be provided by the UE to the BS.

[0122] Paging probability: Paging probability information may be negotiated between the UE and the NW (e.g., RAN and / or CN, 5GC) via RRC signaling and / or NAS signaling.

[0123] Frequency range (e.g., FR1 / FR2) UE RRC state (RRC_IDLE, RRC_INACTIVE, RRC_CONNECTED) · UE channel conditions, e.g. based on SSB / CSI-RS measurements (via RSRP and / or SINR).

[0124] Area of ​​the UE. For example, the UE may know its area based on some geographical information.

[0125] In one embodiment, the new signaling / indication (e.g., PEI) is UE-specific signaling. The UE may be configured with one or more monitoring occasions (e.g., search spaces and / or associated control resource sets).

[0126] In one embodiment, the UE may monitor the PDCCH for new signaling / indication (eg, PEI) based on a particular RNTI (eg, a UE-specific RNTI).

[0127] New signaling / indication (e.g., PEI) settings (and / or corresponding parameters) may be provided in system information (e.g., SIB1, SIB2, etc.) and / or dedicated RRC settings (e.g., RRC reconfiguration, RRC release (with / without suspension setting), etc.), but are not limited to these.

[0128] The UE may monitor new signaling / indication (e.g., PEI) based on a cell-specific RNTI, a group-specific RNTI, and / or a UE-specific RNTI such as a P-RNTI or I-RNTI. In one embodiment, a new RNTI may be introduced for monitoring the new signaling / indication (e.g., PEI). The new RNTI may be configured via system information and / or dedicated RRC configuration (e.g., RRC reconfiguration, RRC release (with or without suspension), a fixed value, and / or other).

[0129] It should be noted that the new signaling / indication (eg, PEI) may be sent via DCI, MAC CE, RRC signaling, system information, and / or NAS signaling.

[0130] The new signaling / indication (e.g., PEI) configuration may include at least one of the following IEs / parameters / fields / information: New signaling / indication (e.g., PEI) search space / CORESET / BWP The UE may be configured with a particular search space / CORESET / BWP to be used for monitoring new signaling / indications (e.g., PEI). The new signaling / indications (e.g., PEI) may be transmitted on the particular search space / CORESET / BWP.

[0131] The search space for the new signaling / indication (e.g., PEI) may reuse (or be associated with) a specific search space (e.g., an existing search space in R-15 / R-16), such as a paging search space. In one embodiment, the new signaling / indication (e.g., PEI) may be transmitted on (or before) a paging monitoring occasion (e.g., PO). Alternatively, the specific search space / CORESET / BWP may be a specific search space / CORESET / BWP used to receive a specific PDCCH / DCI (e.g., DL signaling for data transmission in RRC_INACTIVE). In one implementation, the BWP may be an initial / default BWP. In one embodiment, the BWP may be a specific BWP configured for new signaling / indication (e.g., PEI) monitoring. In one embodiment, the BWP may be a specific BWP configured for PDCCH monitoring in RRC_IDLE / RRC_INACTIVE. If a specific BWP is configured for a new signaling / indication (e.g., PEI), the UE may need to switch its active BWP to the specific BWP at a specific time (e.g., before the time to monitor for the new signaling / indication (e.g., PEI)). The UE may need to switch from the specific BWP back to the initial / default BWP after monitoring for the new signaling / indication (e.g., PEI) occurs.

[0132] New signaling / indication (e.g., PEI) offsets The offset may be a time gap between the new signaling / indication (e.g., PEI) and the (starting position of) PO, PDCCH monitoring opportunity for paging, PF, and / or DRX cycle, etc. The UE may monitor the new signaling / indication (e.g., PEI) and the offset before (each of) the PO, PDCCH monitoring opportunity for paging, PF, and / or DRX cycle. The value of the offset may be in time units such as slot, symbol, subframe, radio frame, ms, etc. The value of the offset may be zero.

[0133] Start position (point) of new signaling / indication (e.g. PEI) The starting position of the new signaling / indication (e.g., PEI) may be a time location / offset to start monitoring the new signaling / indication (e.g., PEI) on each search space, PO, PDCCH monitoring occasion for paging, PF, and / or DRX cycle. The value of the offset may be in time units, e.g., slots, symbols, subframes, radio frames, ms, etc. The value of the offset may be zero.

[0134] Duration of new signaling / indication (e.g. PEI) The duration may be the duration for which the UE should continue to monitor for new signaling / indications (eg, PEI).

[0135] In one embodiment, a timer may be configured for the UE to control when the UE should monitor for new signaling / indication (e.g., PEI). The timer value may be in units of time, such as slots, symbols, subframes, radio frames, ms, etc. The timer value may be infinity. If the timer is configured as infinity, the UE must monitor for new signaling / indication (e.g., PEI) at each monitoring opportunity for new signaling / indication (e.g., PEI).

[0136] While the timer is running, the UE may need to monitor for new signaling / indications (eg, PEIs) at each monitoring opportunity for new signaling / indications (eg, PEIs).

[0137] The timer may be (re)started when the UE receives a new signaling / indication (e.g., PEI) configuration, a new signaling / indication (e.g., PEI), paging, DL signaling in RRC_IDLE / RRC_INACTIVE, a short message, system information, etc.

[0138] The timer may be stopped when the UE enters the RRC_CONNECTED state. The timer may be stopped when the UE receives a new signaling / indication (e.g., PEI) configuration, a new signaling / indication (e.g., PEI), a paging DCI, a paging message, DL signaling in RRC_IDLE / RRC_INACTIVE, a short message, system information, etc., or when the UE terminates power saving operation.

[0139] When the timer expires (or is not running), the UE can stop monitoring for new signaling / indications (e.g., PEI). When the timer expires, the UE may need to monitor each PO.

[0140] In one embodiment, the duration may be associated with the number of POs, PDCCH monitoring opportunities for paging, PFs, and / or DRX cycles. The UE may maintain a counter. The initial value of the counter may be set as the number of POs, PDCCH monitoring opportunities for paging, PFs, and / or DRX cycles. The UE may decrement the counter by one if the UE (successfully) monitors a new signaling / indication (e.g., PEI) once. If the counter is not zero, the UE may need to monitor a new signaling / indication (e.g., PEI) at that monitoring opportunity. If the counter reaches zero, the UE cannot monitor a new signaling / indication (e.g., PEI) at that monitoring opportunity, and the UE may need to monitor each PO. If the counter reaches zero, the UE may terminate / end power saving operation.

[0141] The counter may be reset (to its initial value) when the UE receives a new signaling / indication (e.g., PEI) configuration, a new signaling / indication (e.g., PEI), a paging DCI, a paging message, DL signaling in RRC_IDLE / RRC_INACTIVE, a short message, system information, etc.

[0142] The counter may be reset once during a certain period of time. The frequency at which the counter is reset can be configured by the network.

[0143] Number of new signaling / indications (e.g., PEI) in a duration In one embodiment, the UE may need to monitor multiple new signaling / indications (e.g., PEIs) during a duration, which may be the duration of the new signaling / indication (e.g., PEI), PO, PDCCH monitoring opportunity for paging, PF, and / or DRX cycle. In one embodiment, the NW may transmit / repeat the same new signaling / indication (e.g., PEI) multiple times during the duration (e.g., the content of the multiple new signaling / indications (e.g., PEIs) may be the same). This number may be related to the number of actually transmitted SSBs (e.g., determined according to ssb-PositionsInBurst in SIB1).

[0144] Periodicity of new signaling / indications (e.g., PEI) The periodicity may be a time gap between a new signaling / indication (e.g., PEI) monitoring opportunity and the next new signaling / indication (e.g., PEI) monitoring opportunity. The periodicity may be in units of time, such as slots, symbols, subframes, radio frames, ms, etc. The unit of periodicity may be associated with a PO, a PDCCH monitoring opportunity for paging, a PF, and / or a DRX cycle.

[0145] New signaling / indication (e.g., PEI) features New signaling / indication (e.g., PEI) may indicate to the UE (e.g., on paging occasions) to skip monitoring the PDCCH for paging.

[0146] In one embodiment, the UE may determine whether to apply a function for a new signaling / indication (e.g., PEI) (e.g., whether to skip monitoring the PDCCH for paging at a paging occasion) based on whether the UE successfully receives / detects / decodes a new signaling / indication (e.g., PEI) at a monitoring occasion (e.g., PEI) for the new signaling / indication. For example, if the UE successfully receives / detects / decodes a new signaling / indication (e.g., PEI) at a monitoring occasion for the new signaling / indication (e.g., PEI), the UE may skip monitoring the PDCCH for paging at the paging occasion. In contrast, if the UE does not successfully receive / detect / decode a new signaling / indication (e.g., PEI) at a monitoring occasion for the new signaling / indication (e.g., PEI), the UE may not skip monitoring the PDCCH for paging at the paging occasion.

[0147] In one embodiment, the UE may determine whether to apply the function of the new signaling / indication (e.g., PEI) (e.g., whether to skip the PDCCH for paging at the paging occasion) based on the instruction indicated in the new signaling / indication (e.g., PEI). For example, the instruction may include a value or bit that explicitly indicates whether the UE should skip monitoring the PO. For example, if the value is a first value (e.g., "0"), the UE may need to monitor the PDCCH for paging at the paging occasion, and if the value is a second value (e.g., "1"), the UE may skip monitoring the PDCCH for paging at the paging occasion. For example, if the UE meets a specific criterion by considering the instruction indicated in the new signaling / indication (e.g., PEI), the UE may skip monitoring the PDCCH for paging at the paging occasion. In one embodiment, the instruction in the new signaling / indication (e.g., PEI) may be a Boolean indicator. If the UE receives new signaling / indication (e.g., PEI) that includes an indicator "1" or if the UE receives new signaling / indication (e.g., PEI) without an indicator, the UE may apply the functionality of the new signaling / indication (e.g., PEI). If the UE receives new signaling / indication (e.g., PEI) with an indicator "0", the UE may not apply the functionality of the new signaling / indication (e.g., PEI).

[0148] In one embodiment, if the UE does not successfully receive / detect / decode a new signaling / indication (e.g., PEI) on a monitoring occasion for the new signaling / indication (e.g., PEI), the UE may adopt a default action, which may be specified in the TS and / or configured by the NW, to monitor the PDCCH for paging on the paging occasion or to skip monitoring the PO.

[0149] In one embodiment, if the UE does not successfully receive / detect / decode a new signaling / indication (e.g., a PEI) in a monitoring occasion for the new signaling / indication (e.g., a PEI), the UE may not skip monitoring the PDCCH for paging in the (next or subsequent) paging occasion. The UE may need to monitor the PDCCH for paging in the paging occasion immediately after this monitoring occasion for the new signaling / indication (e.g., a PEI).

[0150] In one embodiment, if the UE does not monitor the new signaling / indication (e.g., PEI) in a monitoring occasion for the new signaling / indication (e.g., PEI) (e.g., if the monitoring occasion collides with another UL / DL resource or monitoring occasion (e.g., paging occasion, PRACH), measurement gap, etc.), the UE may not monitor the new signaling / indication (e.g., PEI) in the monitoring occasion for the new signaling / indication (e.g., PEI). Thereafter, the UE may not skip monitoring the PDCCH for paging in the (next or subsequent) paging occasion. The UE may need to monitor the PDCCH for paging in the paging occasion immediately after this monitoring occasion for the new signaling / indication (e.g., PEI).

[0151] In one embodiment, if a monitoring occasion for a new signaling / indication (e.g., PEI) conflicts with another UL / DL resource or monitoring occasion (e.g., paging occasion, PRACH), measurement gap, etc., the UE may prioritize the new signaling / indication (e.g., PEI). The UE monitors the new signaling / indication (e.g., PEI) and does not transmit / receive on other UL / DL resources. In one embodiment, the UE may prioritize monitoring occasions, channels, and UL / DL resources based on specific rules and / or priorities defined in the TS.

[0152] In one embodiment, if the UE does not monitor a new signaling / indication (e.g., PEI) in a monitoring occasion for the new signaling / indication (e.g., PEI) (e.g., if the monitoring occasion conflicts with another UL / DL resource or monitoring occasion (e.g., paging occasion, PRACH), measurement gap, etc.), the UE may not monitor the new signaling / indication (e.g., PEI) in the monitoring occasion for the new signaling / indication (e.g., PEI). The UE may then adopt a default behavior, which may be specified in the TS and / or configured by the NW. The default action may be to monitor the PDCCH for paging in the paging occasion or to skip monitoring the PO.

[0153] The UL resource may be a PRACH resource, a PUCCH resource, a PUSCH resource, an SRS, etc.

[0154] · DL resources may be SSB, CSI-RS, PDSCH, PO, PDCCH monitoring opportunities for paging, etc.

[0155] In one embodiment, the default action may be set via NAS signaling.

[0156] In one embodiment, the default action may be configured via RRC configuration (e.g., configuration for new signaling / indication (e.g., PEI)).

[0157] In one embodiment, the default action can be set via system information.

[0158] In one embodiment, the default action may be carried in the short message and / or the paging message. For example, the default action may be indicated to the UE via an indicator (e.g., a bit in a bitmap) in the short message. If the indicator indicates a first value (e.g., the bit is set to '1'), the UE may apply the default action. If the indicator indicates a second value (e.g., the bit is set to '0'), the UE may not apply the default action. In another embodiment, the default action may be indicated to the UE via an indicator (e.g., a bit) or a parameter in the paging message. If the indicator indicates a first value (e.g., the bit is set to '1') and / or a parameter associated with the default action is included in the paging message, and the indicator and / or parameter are associated with (or included in) a paging record that includes the UE ID, the UE may apply the default action. If the indicator indicates a second value (e.g., the bit is set to "0") and / or the parameter associated with the default action is not included in the paging message, and the indicator and / or parameter is associated with (or included in) a paging record that includes the UE ID, the UE may apply the default action.

[0159] In one embodiment, when the UE is performing (or initiating) a particular procedure, the UE may monitor for new signaling / indications (e.g., PEI). In one embodiment, when the UE is performing (or initiating) a particular procedure, the UE may not monitor for new signaling / indications (e.g., PEI).

[0160] The particular procedure may be an RA procedure, an RRC connection resumption procedure, an RRC connection establishment procedure, an RRC connection re-establishment procedure, a cell (re)selection procedure, an RNA update (e.g., T380 expires or is triggered upon reception of SIB1), a tracking area update, and / or others.

[0161] In one embodiment, when the UE is in the RRC_CONNECTED state, the UE may not monitor for new signaling / indications (eg, PEI) at monitoring opportunities for new signaling / indications (eg, PEI).

[0162] New signaling / indication (e.g., PEI) can indicate to the UE to wake up to monitor the PDCCH for paging (e.g., at paging occasions).

[0163] In one embodiment, the UE may determine whether to apply a function for the new signaling / indication (e.g., PEI), e.g., whether to wake up to monitor a PDCCH for paging at the paging occasion, based on whether the UE successfully receives / detects / decodes a new signaling / indication (e.g., PEI) at a monitoring occasion (e.g., PEI) for the new signaling / indication. For example, if the UE successfully receives / detects / decodes a new signaling / indication (e.g., PEI) at a monitoring occasion for the new signaling / indication (e.g., PEI), the UE may wake up to monitor a PDCCH for paging at the paging occasion. In contrast, if the UE does not successfully receive / detect / decode a new signaling / indication (e.g., PEI) at a monitoring occasion for the new signaling / indication (e.g., PEI), the UE may not wake up to monitor a PDCCH for paging at the paging occasion.

[0164] In one embodiment, the UE can determine whether to apply the functionality of the new signaling / indication (e.g., PEI), e.g., whether to wake up to monitor the PDCCH for paging at the paging occasion, based on the instruction indicated in the new signaling / indication (e.g., PEI). For example, the instruction may include a value or bit that explicitly indicates whether the UE should wake up. For example, if the value is a first value (e.g., "1"), the UE may need to wake up to monitor the PDCCH for paging at the paging occasion, while if the value is a second value (e.g., "0"), the UE may not need to wake up and may not monitor the PDCCH for paging at the paging occasion. In one embodiment, the instruction in the new signaling / indication (e.g., PEI) may be a Boolean indicator. If the UE receives new signaling / indication (e.g., PEI) that includes an indicator "1" or if the UE receives new signaling / indication (e.g., PEI) without an indicator, the UE may apply the functionality of the new signaling / indication (e.g., PEI). If the UE receives new signaling / indication (e.g., PEI) with an indicator "0", the UE may not apply the functionality of the new signaling / indication (e.g., PEI).

[0165] In one embodiment, if the UE does not successfully receive / detect / decode a new signaling / indication (e.g., PEI) at a monitoring opportunity for the new signaling / indication (e.g., PEI), the UE may adopt a default action, which may be specified in the TS and / or configured by the NW, to either wake up to monitor the PDCCH for paging (e.g., at the paging occasion) or not wake up.

[0166] In one embodiment, if the UE does not successfully receive / detect / decode a new signaling / indication (e.g., a PEI) in a PDCCH monitoring opportunity for the new signaling / indication, the UE may wake up and monitor the next (or subsequent) PDCCH monitoring opportunity for paging. Alternatively, if the UE does not successfully receive / detect / decode a new signaling / indication (e.g., a PEI) in a PDCCH monitoring opportunity for the new signaling / indication, the UE may wake up at the start of the next (or subsequent) PDCCH monitoring opportunity for paging. The UE may still sleep during the gap between the end of the new signaling / indication (e.g., a PEI) duration and the start of the PDCCH monitoring opportunity for paging.

[0167] In one embodiment, if the UE does not monitor the new signaling / indication (e.g., PEI) in a PDCCH monitoring occasion for the new signaling / indication (e.g., PEI) (e.g., if the PDCCH monitoring occasion collides with another UL / DL resource or PDCCH monitoring occasion (e.g., paging occasion, PRACH), measurement gap, etc.), the UE may wake up and monitor the next or subsequent PDCCH monitoring occasion for paging. Alternatively, if the UE does not monitor the new signaling / indication (e.g., PEI) in a PDCCH monitoring occasion for the new signaling / indication (e.g., PEI) (e.g., if the PDCCH monitoring occasion collides with another UL / DL resource or PDCCH monitoring occasion (e.g., paging occasion, PRACH), measurement gap, etc.), the UE may wake up at the start of the next or subsequent PDCCH monitoring occasion for paging. The UE may still sleep during the gap between the end of the new signaling / indication (eg, PEI) duration and the start of the PDCCH monitoring opportunity for paging.

[0168] Association between new signaling / indication (e.g., PEI) and one or more PO, PDCCH monitoring opportunities for paging, PF, and / or DRX cycles In one embodiment, one new signaling / indication (e.g., PEI) command may be applied to one PO, PDCCH monitoring opportunity for paging, PF, and / or DRX cycle. In one embodiment, the UE may apply only one new signaling / indication (e.g., PEI) command for a subsequent (or next) PO, PDCCH monitoring opportunity for paging, PF, and / or DRX cycle. FIG. 4 shows a timing diagram 400 of new signaling / indication (e.g., PEI) associated with one PO / PF / DRX cycle according to an example embodiment of the present disclosure. PEI 402 is associated with PO1 404 (or PF#1, or DRX cycle#1). The UE may apply PEI 402 command to PO1 404 (or PF#1, or DRX cycle#1). Similarly, PEI 412 is applied to PO2 414 (or PF#2, or DRX cycle#2). The UE may apply the instructions of PEI 412 for PO2 414 (or PF#2, or DRX cycle#2).

[0169] In one embodiment, one new signaling / indication (e.g., PEI) command may apply to multiple POs, PDCCH monitoring opportunities for paging, and / or DRX cycles. In one embodiment, the number of POs, PDCCH monitoring opportunities for paging, PFs, and / or DRX cycles may be based on explicit or implicit indication. Figure 5 illustrates a timing diagram 500 of new signaling / indication (e.g., PEI) associated with multiple POs / PFs / DRX cycles according to an example embodiment of the present disclosure. A PEI 502 is associated with a PO, a PF, and / or a DRX cycle. 5, the UE may apply the instructions of the PEI 502 for PO1 504 and PO2 514 (PF#1 and PF#2, or DRX cycle #1 and DRX#2). The PEI 502 may indicate the number of PO / PF / DRX cycles with which the PEI 502 is associated. According to the embodiment shown in FIG. 5, the PEI 502 may indicate two PO / PF / DRX cycles.

[0170] In one embodiment, explicit indications regarding the PO, PDCCH monitoring opportunities for paging, PF, and / or number of DRX cycles may be included in new signaling / indications (e.g., PEI), such as using fields in the DCI.

[0171] In one embodiment, the PO, the PDCCH monitoring opportunities for paging, the PF, and / or the number of DRX cycles may be configured via NAS signaling. The NAS signaling may be encapsulated in an RRC message. An RRC entity of the UE may receive the RRC message including the NAS signaling and forward the NAS signaling to the NAS layer of the UE. Upon receiving the NAS signaling, the NAS layer of the UE may obtain information about the PO, the PDCCH monitoring opportunities for paging, the PF, and / or the number of DRX cycles. The NAS layer of the UE may further forward required RAN-level parameters (e.g., at least one of the information about the PO, the PDCCH monitoring opportunities for paging, the PF, and / or the number of DRX cycles) to the RRC entity of the UE.

[0172] In one embodiment, the PO, PDCCH monitoring opportunities for paging, PF, and / or number of DRX cycles may be configured via RRC configuration (e.g., configuration for new signaling / indication (e.g., PEI)).

[0173] In one embodiment, the PO, PDCCH monitoring opportunities for paging, PF, and / or number of DRX cycles may be configured via system information.

[0174] In one embodiment, the PO, the number of PDCCH monitoring opportunities for paging, the PF, and / or the number of DRX cycles may be conveyed within the short message and / or the paging message.

[0175] In one embodiment, upon receiving the PO, PDCCH monitoring opportunities for paging, PF, and / or number of DRX cycles, the UE may store the values.

[0176] In one embodiment, the UE may apply one new signaling / indication (e.g., PEI) command for one or more POs, PDCCH monitoring opportunities for paging, PFs, and / or DRX cycles until the next monitoring opportunity for the new signaling / indication (e.g., PEI).

[0177] In one embodiment, the UE may apply the instructions of one new signaling / indication (e.g., PEI) for one or more POs, PDCCH monitoring occasions for paging, PFs, and / or DRX cycles until the next new signaling / indication (e.g., PEI) is received. The UE may then apply the instructions of the next received new signaling / indication (e.g., PEI) accordingly.

[0178] In one embodiment, the UE may apply one new signaling / indication (e.g., PEI) command for one or more POs, PDCCH monitoring occasions for paging, PFs, and / or DRX cycles until the end of the associated one or more POs, PDCCH monitoring occasions for paging, PFs, and / or DRX cycles.

[0179] In one embodiment, the UE may apply one new signaling / indication (e.g., PEI) command for one or more POs, PDCCH monitoring occasions for paging, PFs, and / or DRX cycles until the end of the next K DRX cycles (K is an integer), where K may be predefined or preconfigured (e.g., via dedicated signaling or broadcast system information).

[0180] [Availability of new signaling / indication (e.g., PEI)] In one embodiment, one new signaling / indication (e.g., PEI) command may be applied for a certain period of time. The UE may consider the new signaling / indication (e.g., PEI) command to be valid for the certain period of time. The UE may consider the new signaling / indication (e.g., PEI) command to be ineffective after the certain period of time.

[0181] In one embodiment, a validity timer may be configured for the UE. While the validity timer is running, the UE may consider new signaling / indication (e.g., PEI) commands to be valid. While the validity timer is not running, the UE may consider new signaling / indication (e.g., PEI) commands to be invalid.

[0182] FIG. 6 illustrates a timing diagram 600 of associated new signaling / indication (e.g., PEI) and validity timers according to an example embodiment of the present disclosure. In one embodiment, when the UE receives new signaling / indication (e.g., PEI) 602, the UE may (re)start the validity timer. While the validity timer is running within duration T1, the UE needs to monitor all PO / PDCCH monitoring opportunities for paging based on the instructions of the new signaling / indication (e.g., PEI) 602. Thus, if the new signaling / indication (e.g., PEI) 602 instructs the UE to monitor POs, the UE may need to monitor PO1 610, PO2 620, and PO3 630 while the validity timer is running. Because the validity timer is not running for PO4 640, the UE may or may not need to monitor PO4 640, for example, regardless of the instructions of the new signaling / indication (e.g., PEI) 602. On the other hand, if the new signaling / indication (e.g., PEI) indicates to the UE not to monitor the POs, the UE may not need to monitor PO1 610, PO2 620, and PO3 630 while the validity timer is running. Because the validity timer is not running for PO4 640, the UE may or may not need to monitor PO4 640, regardless of, for example, the instructions of the new signaling / indication (e.g., PEI) 602. In one embodiment, the UE can monitor POs that do not fall within the validity timer's operating time (e.g., by following the legacy PF / PO formula without considering the power saving approach). In one embodiment, whether the UE needs to monitor POs that do not fall within the validity timer's operating time may be based on a default action (which may be pre-configured or pre-defined).

[0183] In one embodiment, the value of the validity timer may be configured via an RRC configuration (eg, a configuration for a new signaling / indication (eg, PEI)).

[0184] In one embodiment, the value of the validity timer may be set via system information.

[0185] In one embodiment, the validity timer value may be carried in at least one of a paging DCI, a short message, and a paging message.

[0186] In one embodiment, the value of the validity timer may be related to the number of SSBs actually transmitted (eg, determined according to ssb-PositionsInBurst in SIB1).

[0187] In one embodiment, if the validity timer is set as infinity, the UE may always monitor for new signaling / indication (e.g., PEI) at monitoring opportunities for new signaling / indication (e.g., PEI). In one embodiment, if the validity timer is set as zero or is not set (or not presented), the UE may not monitor for new signaling / indication (e.g., PEI).

[0188] [Power saving profile] In one embodiment, the new signaling / indication may indicate a power saving profile (and / or parameters). The UE may apply the new power saving profile (and / or parameters) based on instructions in the new signaling / indication (e.g., PEI). For example, an explicit indication of the power saving profile (and / or parameters) may be included in the new signaling / indication, e.g., using a field of the DCI. In one embodiment, the UE may be configured with multiple power saving profiles (and / or parameters), and each of the power saving profiles may be associated with an index. The new signaling / indication (e.g., PEI) may indicate an index to indicate one of the power saving profiles.

[0189] In one embodiment, a serving cell (or gNB) may configure a UE with multiple power saving profiles. For example, the UE may be configured with a first power saving profile and a second power saving profile. The parameters of the first power saving profile may be the same as or different from the parameters of the second power saving profile. Each power saving profile may include a set of parameters for the UE to apply so that the UE (or the network) can operate in a power saving manner. The set of parameters in a power saving profile may include one or more of DRX configuration (e.g., DRX-Config IE), paging-related configuration (e.g., PCCH-Config IE), PDCCH monitoring-related configuration (e.g., PDCCH-ConfigCommon), and / or any parameters required to configure the UE to operate in a power saving manner / mode.

[0190] The DRX configuration may include at least one of a DRX on-duration timer (e.g., the drx-onDurationTimer IE), a DRX inactivity timer (e.g., the DRX-InactivityTimer IE), a DRX HARQ RTT DL timer (e.g., the DRX-HARQ-RTT-TimerDL IE), a DRX HARQ RTT UL timer (e.g., the drx-HARQ-RTT-TimerUL IE), a DRX DL retransmission timer (e.g., the drx-RetransmissionTimerDL IE), a DRX UL retransmission timer (e.g., the drx-RetransmissionTimerUL IE), a DRX long cycle start offset (e.g., the DRX-LongCycleStartOffset IE), a DRX short cycle (e.g., the DRX-ShortCycle IE), a DRX short cycle timer (e.g., the drx-ShortCycle IE), and a DRX slot offset (e.g., the drx-SlotOffset IE).

[0191] Paging related settings may include the paging cycle (e.g., DRX cycle, defaultPagingCycle IE, ran-PagingCycle IE, PagingCycle IE), the first PDCCH monitoring opportunity for paging for each PO of the PF (e.g., firstPDCCH-MonitoringOccasionOfPo IE), an offset used by the UE to derive the number of total paging frames within a paging cycle (corresponding to the parameter N used in the PF / PO formula in 3GPP TS36.304) and the paging frame offset (corresponding to the parameter PF_offset used in the PF / PO formula in 3GPP TS36.304) (e.g., nAndPagingFrameOffset IE), the number of paging opportunities per paging frame (e.g., ns IE), the number of PDCCH monitoring opportunities associated with an SSB for paging frames (e.g., nrofPDCCHMonitoringOccasionPerSSB IE).

[0192] ·PDCCH-related configurations may include (but are not limited to) control resource set, search space list, first PDCCH monitoring of PO, paging search space, etc.

[0193] [Number of repetitions of new signaling / indication monitoring] FIG. 7 illustrates a repetition mechanism 700 for new signaling / indication (e.g., PEI) according to an example embodiment of the present disclosure. In one embodiment, the NW can configure / indicate / repeate two or more new signaling / indication (e.g., PEI) to the UE, where the multiple new signaling / indication (e.g., PEI) can contain the same information to indicate the same behavior for one PO, PDCCH monitoring occasion for paging, PF, and / or DRX cycle. As shown in FIG. 7, the NW can set the number of PEI repetitions to three. The UE can receive PEI 702, PEI 704, and PEI 706, all of which contain the same instruction / information to be applied to PO1 710 (or PF#1, or DRX cycle#1).

[0194] In one embodiment, the number of repetitions for new signaling / indication (e.g., PEI) may indicate the number of new signaling / indication (e.g., PEI) monitoring opportunities that the UE should monitor for one PO, PDCCH monitoring opportunity for paging, PF, and / or DRX cycle.

[0195] In one embodiment, the number of repetitions for new signaling / indication (e.g., PEI) may be configured (in advance) via RRC configuration (e.g., configuration for new signaling / indication (e.g., PEI)).

[0196] In one embodiment, the number of repetitions for new signaling / indication (e.g., PEI) may be configured (pre-) via system information.

[0197] In one embodiment, the number of repetitions for new signaling / indication (e.g., PEI) may be carried in at least one of the paging DCI, the short message, and / or the paging message.

[0198] In one embodiment, the number of repetitions for new signaling / indication (e.g., PEI) may be related to the number of actually transmitted SSBs (e.g., determined according to ssb-PositionsInBurst in SIB1). For example, the UE may assume that each actually transmitted SSB transmits a new signaling / indication (e.g., PEI).

[0199] In one embodiment, the repeated new signaling / indication (e.g., PEI) may contain the same information (e.g., the same instruction) to indicate whether the UE should monitor the PDCCH for paging (on paging occasions). The UE may receive the new signaling / indication (e.g., PEI) from a randomly selected actually transmitted SSB.

[0200] In one embodiment, when the UE receives the number of repetitions for a new signaling / indication (eg, PEI), the UE may store the value.

[0201] In one embodiment, if the new signaling / indication (e.g., PEI) is not successfully received in all monitoring opportunities for repetition of the new signaling / indication (e.g., PEI), the UE may consider reception of the new signaling / indication (e.g., PEI) to have failed.

[0202] In one embodiment, if at least one of the repetitions of the new signaling / indication (e.g., PEI) is successfully received in a monitoring opportunity for the repetition of the new signaling / indication (e.g., PEI), the UE may consider the reception of the new signaling / indication (e.g., PEI) to be successful.

[0203] In one embodiment, if one of the repetitions of the new signaling / indication (e.g., PEI) is successfully received at a monitoring opportunity for the repetition of the new signaling / indication (e.g., PEI), the UE may stop monitoring for the repetition of the new signaling / indication (e.g., PEI).

[0204] [Prohibition of monitoring new signaling / indications (e.g., PEI)] In one embodiment, the UE may be prohibited from monitoring new signaling / indications (e.g., PEI) in some cases, such as when the UE is unable to monitor new signaling / indications (e.g., PEI) during a new signaling / indication (e.g., PEI) monitoring opportunity.

[0205] In one embodiment, an inhibit timer may be configured (pre-configured) for the UE. While the inhibit timer is running, the UE cannot monitor for new signaling / indications (e.g., PEI). When the inhibit timer is not running, the UE can monitor for new signaling / indications (e.g., PEI).

[0206] The inhibit timer may be (re)started when the UE enters RRC IDLE / INACTIVE state.

[0207] The inhibit timer may be stopped when the UE enters the CONNECTED state.

[0208] The inhibit timer may be (re)started or stopped when the UE receives an RRC Release (with or without pause) message.

[0209] The inhibit timer may be (re)started or stopped when the UE receives new signaling / indication (e.g. PEI).

[0210] The inhibit timer may be (re)started or stopped when the UE receives a paging (e.g., paging DCI, paging message).

[0211] The inhibit timer can be (re)started or stopped when the UE receives a short message.

[0212] The inhibit timer can be (re)started or stopped when the UE receives system information.

[0213] The inhibit timer can be (re)started or stopped when the UE receives a paging message and the UE ID field in the paging message matches the UE ID.

[0214] The inhibit timer may be (re)started or stopped when the UE initiates an RA procedure and / or an RRC connection resumption procedure.

[0215] In one embodiment, the prohibition timer value may be (pre)configured via RRC configuration (e.g., configuration for new signaling / indication (e.g., PEI)).

[0216] In one embodiment, the prohibit timer value can be configured (pre-configured) via system information.

[0217] In one embodiment, the inhibit timer value may be carried in a short message and / or a paging message.

[0218] In one embodiment, the prohibit timer value may be related to the number of actually transmitted SSBs (eg, determined according to ssb-PositionsInBurst in SIB1).

[0219] In one embodiment, if the inhibit timer is (pre)configured as infinity, the UE cannot monitor for new signaling / indication (e.g., PEI) in a monitoring opportunity for new signaling / indication (e.g., PEI). In one embodiment, if the inhibit timer is (pre)configured as zero or is not (pre)configured, the UE can always monitor for new signaling / indication (e.g., PEI) in a monitoring opportunity for new signaling / indication (e.g., PEI).

[0220] In one embodiment, an indication from the NW may indicate whether the UE is able to monitor a new signaling / indication (e.g., PEI) at a new signaling / indication (e.g., PEI) monitoring opportunity. The indication may be indicated via a new signaling / indication (e.g., PEI), a short message, a paging message, system information, an RRC release (with a suspend message), etc. The indication may be a flag (e.g., 1 bit) indicating whether the UE is able to monitor a new signaling / indication (e.g., PEI) at a new signaling / indication (e.g., PEI) monitoring opportunity.

[0221] In one embodiment, if a UE is prohibited from monitoring new signaling / indications (e.g., PEI) (e.g., based on a prohibition timer), the UE may be required to monitor the PO by default. In one embodiment, if a UE is prohibited from monitoring new signaling / indications (e.g., PEI) (e.g., based on a prohibition timer), whether the UE is required to monitor the PO may be pre-configured or pre-defined.

[0222] Fallback mechanisms for new signaling / indications (e.g., PEI) A UE may fail to monitor / receive / decode a new signaling / indication (e.g., PEI) multiple times or for a certain period of time during a new signaling / indication (e.g., PEI) monitoring opportunity due to, for example, poor channel quality or a collision between the new signaling / indication (e.g., PEI) monitoring opportunity and other resources. In one embodiment, the UE may falsely detect a new signaling / indication (e.g., PEI) multiple times or for a certain period of time. For example, the UE may fail to receive / detect a new signaling / indication (e.g., PEI) during a new signaling / indication (e.g., PEI) monitoring opportunity. That is, the UE may monitor a new signaling / indication (e.g., PEI) monitoring opportunity but fail to receive / detect the new signaling / indication (e.g., PEI).

[0223] In one embodiment, the UE may maintain a counter to count the number of times the UE fails to monitor / receive / decode a new signaling / indication (e.g., PEI) during a new signaling / indication (e.g., PEI) monitoring opportunity. If the value of the counter reaches a maximum value, the UE may implement one or more of the following fallback mechanisms:

[0224] In one embodiment, the UE may maintain a timer to determine whether it can receive any new signaling / indication (e.g., PEI) on a new signaling / indication (e.g., PEI) monitoring occasion while the timer is running. The UE may (re)start the timer when it receives a new signaling / indication (e.g., PEI) on a new signaling / indication (e.g., PEI) monitoring occasion. However, if the timer expires, the UE may implement one or more of the following fallback mechanisms:

[0225] If the UE is unable to monitor / receive / decode new signaling / indication (e.g., PEI) multiple times or for a certain period of time during a new signaling / indication (e.g., PEI) monitoring opportunity, the UE may need to implement one or more of the following fallback mechanisms:

[0226] · The UE should monitor each PO / PDCCH monitoring opportunity (like R-15 / R-16 behavior).

[0227] The UE initiates an RA procedure, an RRC connection resumption procedure, an RRC connection establishment procedure, an RRC connection re-establishment procedure, a cell (re)selection procedure, an RNA update (e.g. T380 expires or is triggered upon reception of SIB1), a tracking area update and / or others.

[0228] The UE sends a specific indication to inform the NW that there is a problem receiving new signaling / indication (e.g., PEI).

[0229] The UE moves to RRC_IDLE state and / or notifies the NAS.

[0230] In one embodiment, the number or time (eg, maximum value of a counter) or period (eg, initial value of a timer) may be configured (pre-) via NAS signaling.

[0231] In one embodiment, the number or time (e.g., maximum value of a counter) or period (e.g., initial value of a timer) may be (pre)configured via RRC configuration (e.g., configuration for new signaling / indication (e.g., PEI)).

[0232] In one embodiment, the number or time (eg, maximum value of a counter) or period (eg, initial value of a timer) may be (pre)configured via system information.

[0233] In one embodiment, the number or time (eg, maximum value of a counter) or period (eg, initial value of a timer) may be conveyed in the short message and / or paging message.

[0234] UE capability / UE assistance information for new signaling / indications (e.g., PEI) In one embodiment, the UE may indicate to the NW whether it supports new signaling / indication (e.g., PEI). For example, when the UE receives a UE capability inquiry from the NW, the UE may send UE capability information to the NW.

[0235] The UE capability parameters may be associated with at least one of the settings / parameters (for new signaling / indications (e.g., PEI)) disclosed in the present disclosure, including: Whether new signaling / indications (e.g. PEI) are supported (and in which RRC states): Whether new cell-specific / group-specific / UE-specific signaling / indications (e.g. PEI) are supported.

[0236] · Which UE groups will support new signaling / indications (e.g. PEI)?

[0237] New signaling / indication (e.g. PEI) max / min offset Maximum / minimum starting position of new signaling / indication (e.g. PEI) Maximum / minimum interval between new signaling / indication (e.g., PEI) and PO, PDCCH monitoring opportunity for paging, PF, and / or DRX cycle Maximum / minimum duration of new signaling / indication (e.g. PEI) Maximum / minimum number of new signaling / indications (e.g. PEI) in a duration Maximum / minimum period of new signaling / indication (e.g. PEI) Maximum / minimum PO, PDCCH monitoring opportunity for paging, PF, and / or DRX cycle associated with one new signaling / indication (e.g., PEI) · Which power saving profiles are supported?

[0238] Whether recurrence for new signaling / indication (e.g., PEI) monitoring is supported Max / min number of iterations for new signaling / indication (e.g. PEI) monitoring.

[0239] In one embodiment, the UE may indicate different UE capabilities (associated with specific UE capability parameters) for TDD and FDD.

[0240] In one embodiment, the UE may indicate different UE capabilities for FR1 and FR2.

[0241] In one embodiment, the UE may indicate different UE capabilities for different RRC states.

[0242] In one embodiment, when the NW inquires about UE capabilities, UEs that have support for the new signaling / indication may be forced to respond with UE capability information.

[0243] In one embodiment, the UE may indicate the priority of the new signaling / indication via the UE Assistance Information. In some cases, the UE may initiate a procedure to transmit the UE Assistance Information in response to a change in its priority to accommodate the corresponding UE Assistance Information, for example, when configured to provide the corresponding UE Assistance Information.

[0244] The UE assistance information may be associated with at least one of the settings / parameters (for new signaling / indication) disclosed in the present disclosure, including: - New signaling / indication suitable UE group Preferred cell-specific / group-specific / UE-specific new signaling / indication New signaling / indication preferred max / min offsets -Preferred maximum / minimum starting position for new signaling / indication Preferred maximum / minimum interval between new signaling / indication and PO, PDCCH monitoring opportunities for paging, PF, and / or DRX cycle New signaling / indication preferred maximum / minimum duration -Preferred maximum / minimum number of new signaling / indications within a duration New signaling / indication preferred maximum / minimum period Preferred max / min PO, PDCCH monitoring occasions for paging, PF, and / or DRX cycle associated with one new signaling / indication (e.g., PEI) -Good power saving profile Preferred number of repetitions for new signaling / indication - Preferred maximum / minimum number of repetitions for new signaling / indication monitoring.

[0245] FIG. 8 illustrates a method 800 performed by a UE for power saving in one of an RRC_INACTIVE state and an RRC_IDLE state according to an example embodiment of the present disclosure. At action 802, the UE receives a first configuration from the BS indicating a paging search space. The paging search space may include one or more POs. The PO may include one or more PDCCH monitoring opportunities. At action 804, the UE receives a second configuration from the BS indicating a search space for monitoring a specific indication. The specific indication may be a Paging Early Indication (PEI). The specific indication may not be a DCP or a WUS. The second configuration may be received via system information or an RRC release message. At action 806, the UE monitors a PDCCH (e.g., configured by the second configuration) within the search space to detect the specific indication. At action 808, the UE determines whether to monitor a PO based on the specific indication, where the PO is determined according to the paging search space.

[0246] In one embodiment, at action 808, the UE may determine whether to monitor the PO based on whether a particular indication (e.g., a PEI) is successfully detected in the search space. The UE may monitor the PO when it determines that the particular indication is successfully detected in the search space. The UE may skip monitoring the PO when it determines that the particular indication is not successfully detected in the search space.

[0247] In one embodiment, at action 808, the UE may determine whether to monitor the PO based on a value of a specific indication (e.g., a PEI). The UE may monitor the PO if the value of the specific indication is a first value. The UE may skip monitoring the PO if the value of the specific indication is a second value.

[0248] In one embodiment, a specific indication (e.g., PEI) is detected before the PO. For example, the UE detects the specific indication before the PO. The offset may be configured in a configuration associated with the specific indication. The offset may be configured in time units, which may be one of slots, symbols, subframes, radio frames, milliseconds, and seconds. In one embodiment, the offset may be zero.

[0249] In one embodiment, the UE may be configured with a timer, and the search space for detecting a particular indication may be monitored while the timer is running. The (initial) value of the timer may be set in units of time, which may be one of slots, symbols, subframes, radio frames, milliseconds, and seconds. The value of the timer may be set as infinity in one embodiment.

[0250] In one embodiment, the specific indication may indicate a UE group. The specific indication may be UE group-specific signaling. In action 808 shown in FIG. 8, the UE may determine whether to monitor the PO according to whether the UE is associated with a UE group. The UE group may be formed based on at least one of a UE ID and UE assistance information.

[0251] In one embodiment, the UE may monitor one or more PDCCH monitoring opportunities within the search space to detect a particular indication according to the number of SSBs transmitted by the BS. The number of SSBs transmitted by the BS may be determined according to ssb-PositionsInBurst in SIB1. In one embodiment, the number of SSBs transmitted by the BS may be related to the number of times the particular indication is repeated during the duration.

[0252] Figure 9 is a block diagram illustrating a node 900 for wireless communication according to an example embodiment of the present disclosure. As shown in Figure 9, the node 900 may include a transceiver 920, a processor 928, a memory 934, one or more presentation components 938, and at least one antenna 936. The node 900 may also include a radio frequency (RF) spectrum band module, a BS communication module, a network communication module, and a system communication management module, input / output (I / O) ports, I / O components, and a power source (not shown in Figure 9).

[0253] The components may communicate directly or indirectly with each other via one or more buses 940. The node 900 may be a UE or a BS that performs the various functions disclosed with reference to Figures 1-8.

[0254] The transceiver 920 has a transmitter 922 (e.g., transmit / transmit circuitry) and a receiver 924 (e.g., receive / receive circuitry) and may be configured to transmit and / or receive time and / or frequency resource partitioning information. The transceiver 920 may be configured to transmit in different types of subframes and slots, including, but not limited to, enabled, disabled, and flexibly enabled subframe and slot formats. The transceiver 920 may be configured to receive data and control channels.

[0255] Node 900 may include a variety of computer-readable media, which may be any available media that may be accessed by node 900 and includes both volatile and nonvolatile media, and removable and non-removable media.

[0256] Computer-readable media may include both volatile and nonvolatile media, as well as removable and non-removable media implemented in any method or technology for storage of information such as computer-readable instructions, data structures, program modules, or data.

[0257] Computer storage media may include RAM, ROM, EPROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage, or other magnetic storage devices. Computer storage media may not include propagated data signals. Communication media may typically embodi computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism and may include any information delivery media.

[0258] The term "modulated data signal" means a signal that has one or more of its characteristics set or changed in such a way that it is encoded in the signal. Communication media can include wired media such as a wired network or direct-wired connection, and wireless media such as acoustic, RF, infrared and other wireless media. Combinations of the above listed components should also be included within the scope of computer-readable media.

[0259] Memory 934 may include computer storage media in the form of volatile and / or nonvolatile memory. Memory 934 may be removable, non-removable, or a combination thereof. Example memory may include solid-state memory, a hard drive, an optical disk drive, etc. As shown in FIG. 9, memory 934 may store computer-readable, computer-executable instructions 932 (e.g., software code) configured to cause processor 928 to perform various functions disclosed herein, for example, in connection with FIGS. 1-8. Alternatively, instructions 932 may not be directly executable by processor 928, but rather may be configured to cause node 900 (e.g., when compiled and executed) to perform various functions disclosed herein.

[0260] The processor 928 (e.g., having processing circuitry) may include intelligent hardware devices such as a central processing unit (CPU), a microcontroller, an ASIC, etc. The processor 928 may include memory. The processor 928 may process data 930 and instructions 932 received from memory 934, as well as information transmitted and received via the transceiver 920, the baseband communication module, and / or the network communication module. The processor 928 may also process information transmitted to the transceiver 920 for transmission to the network communication module via the antenna 936 for transmission to the core network.

[0261] One or more presentation components 938 can present a data indication to a person or another device. Example presentation components 938 can include a display device, a speaker, a printed component, a vibrating component, and the like.

[0262] In view of the present disclosure, it is apparent that various techniques may be used to implement the disclosed concepts without departing from the scope of those concepts. Moreover, while these concepts have been disclosed with particular reference to certain embodiments, those skilled in the art will recognize that changes may be made in form and detail without departing from the scope of these concepts. The disclosed embodiments are therefore to be considered in all respects as illustrative and not restrictive. It is also to be understood that the present disclosure is not limited to the particular embodiments disclosed, but that many rearrangements, modifications, and substitutions are possible without departing from the scope of the present disclosure.

Claims

1. 1. A method performed by a user equipment (UE) for power saving in one of a radio resource control (RRC)_INACTIVE state and an RRC_IDLE state, the method comprising: receiving a first configuration from a base station (BS), the first configuration indicating a paging search space; receiving a second configuration from the BS indicating a search space for monitoring a particular indication; monitoring a physical downlink control channel (PDCCH) within the search space to detect the particular indication; determining whether to monitor one or more paging occasions (POs) based on the particular indication, the one or more POs being determined according to the paging search space; determining whether to monitor the one or more POs based on whether the particular indication is successfully detected within the search space; monitoring the one or more POs upon determining that the particular indication has been successfully detected within the search space; and skipping the step of monitoring the one or more POs upon determining that the particular indication was not successfully detected within the search space; Including, the specific indication indicates a power saving profile, and the UE applies the power saving profile based on an instruction of the specific indication. method.

2. determining whether to monitor the one or more POs based on the value of the particular indication; monitoring the one or more POs when the value of the particular indication is a first value; and skipping the step of monitoring the one or more POs if the value of the particular indication is a second value; The method of claim 1 further comprising:

3. The method of claim 1 , wherein the particular indication is detected before the one or more POs.

4. The method of claim 1 , wherein the search space is monitored while a timer runs.

5. The method of claim 1 , wherein the particular indication indicates a UE group.

6. The method of claim 5 , wherein determining whether to monitor one or more POs comprises determining whether the UE is associated with the UE group.

7. The method of claim 5 , wherein the UE group is formed based on at least one of UE identity and UE assistance information.

8. The method of claim 1 , wherein the second configuration is received via one of system information and an RRC release message.

9. monitoring one or more PDCCH monitoring opportunities within the search space to detect a particular indication according to the number of SSBs transmitted by the BS; The method of claim 1 further comprising:

10. 1. A user equipment (UE) for power saving in one of a radio resource control (RRC)_INACTIVE state and an RRC_IDLE state, the UE comprising: a processor, and a memory coupled to said processor, said memory storing a computer executable program which, when executed by said processor, causes said processor to perform the method of any one of claims 1 to 9; A UE including:

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