OA20860A - Idle state UE signal reception method, apparatus, storage medium, and terminal. - Google Patents

Abstract

A signal reception method and apparatus for a UE in an idle-state, a storage medium, and a terminal. The method includes: monitoring signal quality of a serving cell; and determining and receiving system information matching the signal quality based on the signal quality.

Description

1DLE STATE UE SIGNAL RECEPTION METHOD, APPARATUS, STORAGE MEDIUM, AND TERMINAL

CROSS-REFERENCE TO RELATED APPLICATIONS

This application daims priority to Chinese Patent Application No. 201911402023.4, filed on December 30, 2019, and entitled “SIGNAL RECEPTION METHOD AND APPARATUS FOR UE IN IDLE-STATE, STORAGE MEDIUM, AND TERMINAL”, the entire disclosure of which is incorporated herein by reference.

TECHNICAL FIELD iü [0001] The present disclosure generally relates to radio communication technology field, and more partîcularly, to a signal réception method and apparatus for a User Equipment (UE) in an idle-state, a storage medium, and a terminal.

BACKGROUND

[0002] 3GPP MTC technology has evolved through two générations of 3GPP R12 MTC and 15 RI3 enhanced MTC (eMTC), and is significantly close to 2G in terminal and signîfîcantly better than 2G and 4G in coverage (R13 eMTC has achieved coverage enhancement capability of conventional LTE frequency division duplex mode of 15dB) and power consumption by introducing key technologies such as 1.4 MHz bandwidth reduced low complexity, coverage enhancement (CE, also known as enhanced coverage) or Power Savîng Mode (PSM). However, 20 it is unavoidable that peak rate (R 13 eMTC downlînk/uplink (DL/UL) is 800kbps and IMbps, respectively) and low delay index hâve significantly deteriorated compared with 4G.

[0003] Based on market tests, 3GPP R13 eMTC technology is basically sufficîent for simple application scénarios such as sensors, meters and e-books. However, in application scénarios such as voice wearables and telemedîcine, the peak rate of RI3 eMTC of 1 Mbps is quite difficult 25 to support.

[0004] Therefore, in 3GPP RI4 further eMTC (feMTC), a new capability category Cat.M2 was introduced, and original RI3 Cat.Ml DL/UL 800kbps/lMbps was improved to maximum theoretical throughput of R14Cat.M2 DL/UL 4Mbps/7Mbps by relaxing a working bandwidth to 5MHz. In addition, RI4 feMTC introduced non-bandwidth reduced low complexity (Non-BL) 30 spécification that supports CE, Le., adding CE capability to terminal capability categories of

Cat.O and higher, making a peak rate of MTC technoiogy family exactly the same as that of conventional LTE terminais, and a coverage gain up to I5dB, thereby significantly broadening a coverage of 4G cells (actual deployment démonstration data shows that a cell coverage area is increased by a typical value of 87% based on CE mode A) and reducing cost of 4G network 5 deployment.

SUMMARY

[0005] Embodiments of the present disclosure may optimize a signaiing réception process for terminais to save power consomption and improve user expérience.

[0006] In an embodiment of the present disclosure, a signal réception method for a UE in 10 an idle-state is provided, inciuding: monitoring signal quality of a serving cell; and determining and receiving System information matching the signal quality based on the signal quality.

[0007] In an embodiment of the present disclosure, a signal réception apparatus for a UE in an idle-state is provided, inciuding: a monitoring circuitry configured to monitor signal quality of a serving cell; and a receiving circuitry configured to déterminé and receive System information 15 matching the signal quality based on the signal quality.

[0008] In an embodiment of the present disclosure, a storage medium having computer instructions stored therein is provided, wherein when the computer instructions are executed, the above method îs performed.

[0009] In an embodiment of the present disclosure, a terminal inciuding a memory and a 20 processor îs provided, wherein the memory has computer instructions stored therein, and when the processor executes the computer instructions, the above method is performed.

[0010] Embodiments of the present disclosure may provide following advantages.

[0011] In embodiments of the present disclosure, a signal réception method for a UE in an idle-state is provided, inciuding: monitoring signal quality of a serving cell; and determining 25 and receiving System information matching the signal quality based on the signal quality. With the embodiments of the present disclosure, a UE in an idle state supporting enhanced coverage may receive different System information on demand based on signal quality. Specifically, different from the existing techniques, in the embodiments of the present disclosure, pre-reading of different System information îs triggered on demand by monitoring the signal quality of the 30 cell where the UE is currently located in real time, thus complété System information required by reselection is received based on necessary power consumption cost merely at necessary time, which improves mobility expérience of users to which the UE in the idle State belongs.

[0012] Further, said determining and receiving System information match ing the signal quality based on the signal quality includes: determining a mode transition trigger préparation condition that the signal quality satisfîes, wherein the mode transition trigger préparation condition corresponds to a candidate coverage category; determining the candidate coverage category and System information corresponding to the candidate coverage category based on the mode transition trigger préparation condition; and receiving the System information corresponding to the candidate coverage category. In the embodiments of the présent disclosure, the réception of System information corresponding to the candidate coverage category is started mereiy when the signal quality of the serving cell satisfîes the mode transition trigger préparation condition, which further provides a feasible solution for receiving System information on demand, thereby reducing power consumption.

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG. 1 is a flow chart of a signal réception method for a UE in an idle-state according to an embodiment;

[0014] FIG. 2 îs a diagram of an idle-state workflow of a UE in an idle-state according to an embodiment;

[0015] FIG. 3 is an application scénario diagram of a signal réception method for a UE in an idle-state according to an embodiment; and

[0016] FIG. 4 is a structural diagram of a signal réception apparatus for a UE in an idle-state according to an embodiment.

DETAILED DESCRIPTION

[0017] In existing techniques, a Non-BL UE in a regular coverage mode may enter a regular coverage blind area due to mobility, which reduces user expérience.

[0018] In 3GPP TS36.300, UE categories include category Ml (i.e., Cat-Ml) UE, category M2 (Cat-M2) UE and Non-BL UE, Non-BL UE is category 0 or higher category. The CE mode includes mode A (CE mode A) and mode B (CE mode B), Maximum working bandwidth of various UE services is shown in Table 1.

Table 1

	Mode A	Mode B
Cat-M 1	6/6	6/6
Cat-M2	24/24	24/6
Non-BL	96 (or 24)/24	96 (or 24)/6

[0019] Unfortunately, as 3GPP RI4 neglected to configure a downîink 64QAM modulation mode for Non-BL LJEs, a Physical Downîink Shared Channel (PDSCH) ofNon-BL UEs of R14 has a maximum modulation mode of 16QAM with relatively low spectrum efficiency. If this kind of Non-BL UEs obtain a high enough data throughput, network capacity may be seriously affected, which is catastrophic for network spectrum resources. The problem of low spectrum efficiency was not fundamentally resolved until support of a downîink 64QAM modulation method was introduced in Even further enhanced MTC (efeMTC) of 3GPP RI5.

[0020] 3GPP TS36.300 provides following stipulations on network camping and IDLE behavior ofNon-BL UEs. A cell that allows the UEs to access using the enhanced coverage mechanism must be adapted to System Information Block typel-Bandwidth Reduced (SIB 1 BR). A process of reading system information for Non-BL UEs in the enhanced coverage mode îs the same as that for Cat-M1/Cat-M2 UEs. In the regular coverage mode, Non-BL UEs can choose to read regular system information for network camping and subséquent procedures.

[0021] In the enhanced coverage mode, a paging monitoring mechanism of the Non-BL UEs is the same as that of Cat-MI/Cat-M2 UEs, and configuration details of paging occasions are not transferred by a spécifie coverage category of the UE.

[0022| When initiating a request for paging a Non-BL UE to an access network, a core network needs to carry information about an enhanced coverage category and a corresponding cell identifier. If the paging request lacks necessary information (such as wireless access capability of the UE), a base station may choose to start a call at the sanie time in a conventîonal Long Term Evolution (LTE) terminal paging occasion and in an enhanced coverage terminal paging occasion, so as to avoid calling omission.

[0023] In an idle state, the Non-BL UE does not need to notify the network when the enhanced coverage category changes.

[0024] 3GPP TS36.321 stipulâtes that Non-BL UEs follows the S crîterîon to détermine the enhanced coverage category for camping on. When in the enhanced coverage mode, the Non-BL UEs shall return to a regular coverage mode by reseîection as much as possible.

[0025] According to 3GPP TS 36.304, the S criterion in the regular coverage mode is defined as following.

Srxlev>0 and Squal>0;

S ΓΧ16 V - Q rx ! ev m eas' (Q rx I evm m+ Qra I evm moffset)-Pœ^^^ ffs Cttem p,

Squal⁼Qqualineas-(Qqualmin + Qqualminoft'set)-Qoffsettemp,

[0026] Srxlev represents a cell sélection RX level value în dB, Qrxievmeas represents a measured cell RX level value, i.e., RSRP, Qrxievmm represents a minimum required RX level in the cell in dBm, Qrxievmiixitfset represents an offset (details can be referred to 3GPP TS23.122), Pcompensation represents a compensation amount (details can be referred to 3GPP TS36.331 and TS36.101), and Qoffsettemp represents an offset amount (details can be referred to 3GPP TS36.331).

[0027] Squal represents a cell sélection quality value în dB, Qquaimeas represents a measured cell quality factor, i.e., RSRQ, Qquaimin represents a minimum required quality level in the cell in dB, Qquaiminoffset represents an offset (details can be referred to 3GPPTS23.122).

[0028] One ski lied in the art understands that Qrxievmin and Qquaimin are derived from conventional SIB1. For the CE mode A, Qrxievmin and Qquaimin are replaced by QrxievminCE and QquaiminCE respectively to check whether the S criterion is met. Similarly, for the CE mode B, Qrxlevmin and Qquaimin are replaced by parameters QrxievminCEi and QquaiminCE] respectively to check whether the S criterion îs met. Corresponding parameters QrxievmmCE/QtxievmmŒi and QqualmmCE/QquaimmCEl ail COlTie from SIB1-BR.

[0029] Similarly, relevant information of same-frequency neighbors for cell reselectîon îs stored in SIB3 or SIB3 scheduled by SIB1-BR, and relevant information of different-frequency neighbors is stored in S1B5 or SJB5 scheduled by SIB1-BR.

[0030[ Based on the above analysis, when a blon-BL UE is in regular coverage, merely the S criterion of regular coverage can be evaluated through SIB1. Once the Non-BL UE enters a regular coverage blind area due to mobility and does not meet the regular coverage relevant criteria, the Non-BL UE may merely inîtiate a service cell unavailability procedure to retry an enhanced coverage mode of the cell to camp on a network or enter a blind search procedure. A lost coverage State for a certain time period inevitably interfères with user expérience. In addition, as the Non-BL UE în the regular coverage mode cannot deduce a relevant criteria of samefrequency/inter-frequency neighbor cells, when the regular coverage blind area cannot realize re5 sélection of better regular coverage cells, the Non-BL UE may miss an occasion of reselection of enhanced coverage target cells by the regular coverage serving cells.

(0031] In view of the above problems, the existing techniques proposed that even in conventional coverage scénarios, Non-BL UEs should read SIBI-BR and its scheduled SIB3 and SIB5 by default, and obtain an S criterion decision basis for CE mode A and CE mode B in advance. However, 4G network deployment does not always hâve conventional coverage blind spots or the UE does not necessarily enter the conventional coverage blind spots. The default reading of SIBI-BR and its scheduled SIB3 and SIB5 results in a waste of power consumption. In addition, as S1B1-BR and its scheduled SIB3 and SIB5 provide coverage services to cells, they are usually configured with higher répétition and longer scheduling periods, which means that power consumption of collecting ail required S1B is quite wasteful.

[0032] As the SIBI-BR and its supporting SIB contain ail the information required for reselection, the existing techniques also proposed that the Non-BL UE works in the enhanced coverage mode by default in an idle State. In prînciple, the corresponding design does not conform to Non-BL design guidelines, but it does not violate standards, as a sélection of enhanced coverage category is uni latéral ly confirmed by the UE, which is free. However, paging în the enhanced coverage mode serves UEs that are actually under enhanced coverage, thus, physical channels related to paging are configured repeatedly. To collect ail the required paging information, the Non-BL UE that only needs to work in the regular coverage mode is forced to work in the enhanced coverage mode and needs to pay longer working time in the idle State, which increases power consumption. Besides, ail BL UEs are concentrated in the enhanced coverage mode, which may seriously reduce paging capacity and affect user expérience of the entire network. Besides, the Non-BL UEs that only need to work in the regular coverage mode are forced to work în the enhanced coverage mode and enter a connected State, which immediately trigger an intra-cell handover from the enhanced coverage mode to the regular coverage mode, thereby increasing extra signaling consumption and affecting service continuity.

[0033] In embodiments of the présent disclosure, a signal réception method for a UE in an idle-state is provided, including: monitoring signal quality of a serving cell; and determining and receiving System information matching the signal quality based on the signal quality.

[0034] With the embodiments, a UE in an idle state supporting enhanced coverage may receive different System information on demand based on signal quality. Specîfically, different from the existing techniques, in the embodiments of the présent disclosure, pre-reading of different system information is triggered on demand by monitoring the signal quality of the cell where the UE is currently located in real time, thus complété system information required by reselection is received based on necessaty power consumption cost merely at necessary time, which improves mobility expérience of users to which the UE in the idle State belongs.

[0035] In order to clarify the objects, characteristics and advantages of the disclosure, embodiments of présent disclosure will be described in detail in conjunction with accompanying drawings.

[0036] FIG. 1 is a flow chart of a signal réception method for a UE in an idle-state according to an embodiment. The method may be performed by a UE and includes S101 and SI02.

[0037] In SI01, the UE monitors signal quality of a serving cell.

|0038] In S102, the UE détermines and receives system information matching the signal quality based on the signal quality.

[0039] In some embodiments, the UE may détermine whether the serving cell supports an enhanced coverage mode, so that the UE may receive System information on demand based on the serving cell supportîng the enhanced coverage mode.

[0040] In S101, the UE supportîng enhanced coverage may monitor signal quality of the serving cell according to an idle State workflow of the UE in the idle state. The UE may receive M1B and déterminé whether a field schedulînginfoSIBl-BR-rl3 in the M1B are not ail zéro. If the field schedulinglnfoSlB 1 -BR-rl3 is not ail 0, it indicates that a network camped on currently supports CE.

[0041] In some embodiments, the signal quality of the serving cell is represented by a serving cell measurement parameter which includes at least one of Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), reference signal S IN R (RS-S1NR), and Received Signal Strength Indicator (RSSI).

[0042] In some embodiments, the coverage mode adopted by the UE may vary, Coverage categories selected by the UEs camping on the cell are different, and system information to be received is also different. Before the UE transitions from the regular coverage mode to the enhanced coverage mode, the UE needs to obtain System information of the enhanced coverage mode to obtain relevant system information. On the contrary, before the UE transitions from the enhanced coverage mode to the regular coverage mode, the UE needs to obtain system information of the regular coverage mode to obtain relevant system information. If the UE needs to change the coverage mode, the UE needs to receive System information relevant with the coverage mode, and has an opportunity to adopt the corresponding coverage mode.

[0043] In S102, based on the signal quality satisfying the mode transition trigger préparation condition, the UE may receive System information corresponding to different coverage 5 categories as needed. Said receiving System information corresponding to different coverage categories on demand refers to determining System information of the coverage category corresponding to the demand based on the demand, and receiving the System information. Specificalty, the UE détermines a candidate coverage category suitable for the UE based on the signal quality, détermines System information corresponding to the candidate coverage category, io and receive the System information. The System information is System information to be received that is determined based on the coverage category.

[0044] Specifically, the UE may détermine whether the signal quality satisfies a spécifie mode transition trigger préparation condition according to the signal quality of the serving cell. Based on the signal quality satisfying the mode transition trigger préparation condition, the UE may 15 détermine a candidate coverage category that satisfies the mode transition trigger préparation condition and System information corresponding to the candidate coverage category. Afterward, the UE may receive the System information corresponding to the candidate coverage category.

[0045] For example, if the signal quality is higher than the mode transition trigger préparation condition, the UE does not need to change the coverage mode, and does not need to receive 20 System information corresponding to other coverage categories. If the signal quality is lower than or equal to the mode transition trigger préparation condition, the UE may déterminé a candidate coverage category and System information corresponding to the candidate coverage category, and may receive the System information corresponding to the candidate coverage category.

[0046] There may be multiple candidate coverage categories, and multiple mode transition 25 trigger préparation conditions, and the mode transition trigger préparation conditions and the candidate coverage categories are in one-to-one correspondence. Currently, the UE may support two coverage modes including the regular coverage mode and the enhanced coverage mode. In this case, when the signal quality of the serving cell to which the UE belongs meets the mode transition trigger préparation condition, the UE may ignore the candidate coverage category, and 30 directly déterminé that it supports either the regular coverage mode or the enhanced coverage mode.

[0047] In some embodiments, as the current UE is either în the regular coverage mode or the enhanced coverage mode, when the signal quality monitored by the UE satisfies the mode transition trigger préparation condition, the UE can know that the candidate coverage mode is the regular coverage mode or the enhanced coverage mode. In addition, the UE has known the system information required by the regular coverage mode and the system information required by the enhanced coverage mode, thus, the UE can quickly détermine the system information that needs to be received.

[0048] In some embodiments, if the signal quality of the serving cell satisfies the mode transition trigger préparation condition, the UE may receîve the system information to be received after performing pagîng monitoring and measurement. Specifically, regardless of whether the UE is in the regular coverage mode or the enhanced coverage mode, based on the signal quality of the serving cell satisfies the mode transition trigger préparation condition, the UE may receive the system information that needs to be received after performing paging monitoring and measurement.

[0049] In some embodiments, when receiving the system information that needs to be received, the UE may temporarily stop determining whether the signal quality of the serving cell satisfies the mode transition trigger préparation condition. *

[0050] Alternatively, when receiving the System information corresponding to the candidate coverage category, the UE may continue to détermine whether the signal quality of the serving cell satisfies the mode transition trigger préparation condition. Based on the détermination resuit indicating that the signal quality no longer satisfies the mode transition trigger préparation condition, the UE may not interrupt system information being received currently, in other words, the UE may complété receiving the System information being received currently.

[0051] Alternatively, when the UE receives the system information corresponding to the candidate coverage category, the UE may continue to détermine whether the signal quality of the serving cell satisfies the mode transition trigger préparation condition. Based on the détermination resuit indicating that the signal quality no longer satisfies the mode transition trigger préparation condition, the UE may immediately interrupt the system information being received currently and enter a sleep préparation state, în other words, the UE may stop receiving the System information being received currently, and enter an idle State workflow.

[0052| Further, when the UE receives a paging message and identifies that the UE will transition from the idle state to a connected state, the UE may stop determining whether the signal quality of the serving cell satisfies the mode transition trigger préparation condition.

[0053] Further, the UE may immediately enter a sleep préparation state to résumé an idle state 5 workflow after successfully receiving the system information that needs to be received.

[0054] In some embodiments, the serving cell is in a regular coverage mode, and the signal quality of the serving cell satisfying the mode transition trigger préparation condition includes; Srxlev<N, Squal<N and this lasting for a duration T, T=PagingCyclexM, where N îs a positive integer greater than 1, M is a positive integer greater than I, Srxlev represents a cell sélection réception category factor in dB, Squal represents a cell sélection quality factor in dB, Srxlev and Squal are calculated based on the signal quality, T represents the duration, and PagingCycle represents a paging cycle. For example, N is selected from a set {3, 4, 5, 6}, and M is selected from a set {3, 4, 5}.

[0055] In some embodiments, the serving cell is in a regular coverage mode, and the signal 15 quality of the serving cell satisfying the mode transition trigger préparation condition includes:

RS_STNR<Th and this lasting for a duration T, T=PagingCycle^xM, where Th is a négative integer, M is a positive integer greater than 1, RS_SINR represents a reference signal SINR in dB, and PagingCycle represents a paging cycle. For example, Th is selected from a set {-3, -4, -5, -6}, and M is selected from a set ]3, 4, 5}.

[0056] In some embodiments, the serving cell is in a regular coverage mode, and the signal quality of the serving cell satisfying the mode transition trigger préparation condition includes: Srxlev<N, Squal<N, RS_SlNR<Th and this lasting for a duration T, T=PagingCycle*M, where N is a positive integer greater than 1, Th is a négative integer, M is a positive integer greater than l, Srxlev represents a cell sélection réception category factor in dB, Squal represents a cell sélection quality factor in dB, Srxlev and Squal are both calculated based on the signal quality, RS_SINR represents a reference signal SINR in dB, T represents the duration, and PagingCycle represents a paging cycle. For example, N is selected from a set {3, 4, 5, 6], Th is selected from a set {-3, -4, -5, -6}, and M is selected from a set {3, 4, 5}.

[0057] If the UE is în the enhanced coverage mode, the signal quality of the serving cell satisfies the mode transition trigger préparation condition, the UE does not hâve any better cell reselectîon event, and the cell reselection event is not started, the UE may receive the system information that needs to be received, wherein the system information that needs to be received refers to system information required by the regular coverage mode. Altematively, if the UE is in the regular coverage mode, the signal quality of the serving cell satisfies the mode transition trigger préparation condition, the UE does not hâve any better cell reselectîon event, and the celi reselection event is not started, the UE may receive the system information that needs to be received, wherein the System information that needs to be received refers to System information required by the enhanced coverage mode.

[0058] In some embodiments, the serving cell is in an enhanced coverage mode, and the signal quality of the serving cell satisfying the mode transition trigger préparation condition includes: Srxlev>N, Squal>N and this lastîng for a duration T, T=PagingCycle^xM, where N is a négative integer, M is a positive integer greater than 1, Srxlev represents a cell sélection réception category factor in dB, Squal represents a cell sélection quality factor in dB, Srxlev and Squal are both calculated based on the signai quality, Q_rxlevmin and Q_qualmin, T represents the duration, PagingCycie represents a paging cycle, Q_rxlevmin represents a minimum required réception level în the cell, and Q_qualmin represents a minimum required quality level in the cell. For example, N is selected from a set {-3, -4, -5, -6}, and M is selected from a set {3, 4,5}.

[0059] In some embodiments, the serving cell is in an enhanced coverage mode, and the signal quality of the serving cell satisfying the mode transition trigger préparation condition includes: RS_SINR> Th and this lastîng for a duration T, T=PagingCycle>ⁱM, where Th is a négative integer, M is a positive integer greater than I, RS_SINR represents a reference signal SINR in dB, and PagingCycie represents a paging cycle. For example, Th is selected from a set {-3, -4, -5, -6}, and M is selected from a set [3, 4, 5}.

[0060] in some embodiments, the serving cell is in an enhanced coverage mode, and the signal quality of the serving cell satisfying the mode transition trigger préparation condition includes: Srxlev> N, Squaî>N, RS_SINR>Th and this lastîng for a duration T, T= PagingCycle^xM, where N is a négative integer, Th is a négative integer, Srxlev represents a celi sélection réception category factor in dB, Squal represents a cell sélection quality factor in dB, Srxlev and Squal are both calculated based on the signal quality, Q_rxlevmin and Q_quahnin, T represents the duration, PagingCycie represents a paging cycle, M is a positive integer greater than 1, Q_rxlevmîn represents a minimum required réception category factor of the cell, Q_qualmin represents a minimum required quality factor of the cell, and RSS1NR represents a reference signal SINR in dB. For example, N is selected from a set {-3, -4, -5, -6}, Th is selected from a set {-3, -4, -5, -6}, and M is selected from a set {3, 4, 5}.

H

[0061] Further, after the UE receives the System information that needs to be received, the UE may détermine whether the signal quality of the serving cell satisfies the mode transition trîgger condition. Based on the signal quality of the serving cell satisfying the mode transition trîgger condition, the UE may perform coverage mode transition. In some embodiments, the coverage mode transition may be a transition from the regular coverage mode to the enhanced coverage mode, or a transition from the enhanced coverage mode to the normal coverage mode.

[0062] In some embodiments, the serving cell is in the regular coverage mode, and the signal quality of the serving cell satisfies the mode transition trîgger condition may refer to that S criterion satisfies the serving cell unavailability condition. The S crîterîon satisfying the unavailabîlity condition of the serving cell includes either Srxlev or Squal being smaller than 0, where the S criterion in the regular coverage mode may be referred to 3GPP TS36.304 standard.

[0063] In some embodiments, the signal quality of the serving cell satisfying the mode transition trîgger préparation condition includes a reference signal S IN R of the serving cell satisfying a following condition: RS_SINR<Thl and this lastîng for a duration Tl, Tl =PagingCycle*Q, where RS_SINR represents the reference signal SINR, Tl represents the duration, and Thl is a négative înteger. For example, Thl is selected from a set {-5, -6, -7, -8}, and Q is selected from a set {3, 4, 5}.

[0064] In some embodiments, the signal quality of the serving cell satisfying the mode transition trîgger préparation condition includes: the S criterion satisfying the serving cell unavailability condition, and the reference signal SINR of the serving cell satisfying a following condition: RS_SlNR<Th! and this lastîng for a duration Tl, Tl =PagingCyclexQ, where RS_SINR represents the reference signal SINR, Tl represents the duration, and Thl is a négative înteger. For example, Thl is selected from a set {-5, -6, -7, -8}, and Q is selected from a set {3, 4, 5}·

[0065] In some embodiments, the serving cell is in an enhanced coverage mode, and the signal quality of the serving cell satisfying the mode transition trîgger préparation condition includes S criterion satisfying a regular coverage condition of the serving cell, where the S criterion în the regular coverage mode may be referred to 3GPP TS36.304 standard.

[0066] In some embodiments, the signal quality of the serving cell satisfying the mode transition trîgger préparation condition includes an SINR of a reference signal of the serving cell satisfying a following condition; RS_SINR>Th2 and this lastîng for a duration Tl, Tl=PagingCycle^xQ, where Tl represents a duration of RS_SINR>Th2, PagingCycle represents a paging cycle, RS_S1NR represents a reference signal SINR, and Th2 is a négative integer. For example, Th2 is selected from a set {-6, -5, -4, -3}, and Q is selected from a set {3, 4, 5}.

[0067] In some embodiments, the signal quality of the servîng cell satisfying the mode transition trigger préparation condition includes: the S criterion satisfying a serving cell unavailability condition, and the SINR of the reference signal of the serving cell satisfying a following condition: RS_SINR>Th2 and this lasting for a duration Tl, where RS_SINR represents the SINR of the reference signal, Tl represents a duration of RS_SINR>Th2, Tl=PagingCyclexQ, PagingCycle represents a paging cycle, and Th2 is a négative integer. For example, Th2 is selected from a set [-6, -5, -4, -3}, and Q is selected from a set {3, 4, 5}.

[0068] More details are provided with spécifie embodiments as follows.

[0069] In the below embodiment, the UE is in the regular coverage mode.

[0070] First, the UE camps on a network to read a MI B, and détermines whether a filed schedulinglnfoSlB 1 -BR-rl 3 in the MIB is not ail zéro. If not, the serving cell where the UE is currently camping on does not support CE. It should be noted that according to 3GPP TS36.213/36.331, the field schedulinglnfoSlB 1-BR-rl3 is not ail 0, which îndicates that a current network to be camped on supports CE. The UE may continue to read regular SIB1 information, and détermine whether the S criterion for regular coverage is satisfied based on Q_rxlevmin and Q_qualmin information in SIB1 information. If the S criterion is not satisfied, the UE may jump to the enhanced coverage mode to camp on the network.

[0071] Secondly, when the UE supports coverage enhancement and regular coverage, the UE tries to camp on the network in the regular coverage mode, perform regular idle state tasks and monitor a measurement parameter of the serving cell.

[0072] The serving cell measurement parameter may include, but is not lîmited to, RSRP, RSRQ and RS-S1NR.

[0073] Thirdly, if the measurement parameter of the serving cell does not meet the mode transition trigger préparation condition, the UE in the idle state may maintain a normal idle state workflow to perform tasks such as monitoring paging and cell reselection évaluation, where normal task sequences such as idle State sleep, wake-up, synchronization resumption, paging monitoring, and measurement are included.

[0074] FIG. 2 is a diagram of an idle state workflow of a UE in an idle state according to an embodiment. Referring to FIG. 2, when the UE is in the idle state, the UE enters sleep 13 préparation at a certain time, and then enters a sleep State and holds for a time period. In FIG. 2, the (JE performs sleep préparation in a subframe (m-1), and is in the sleep State during a period from a subframe m to a subframe (n-2). Afterward, the UE may wake up or tend to be stable in a subframe (n-1). Further, the UE performs synchronization resumption sample collection in a subframe n, and performs sample waiting and sample processing from a subframe (n+1) to a subframe (πτ-Μ-l). Further, a subframe (n+M) is a paging occasion (PO). The UE receives paging, and then performs measurement. After the measurement, the UE continues to enter the sleep préparation State and the sleep State.

[0075] In some embodiments, if the measurement parameter of the serving cell satisfies the mode transition trigger préparation condition and no better cell reselection event occurs, the UE may start a mode transition System information pre-reading procedure to obtain SIB1-BR and other SIBs of the current cell. A judging process of absence of any preferred cell reselection event can be referred to existîng methods, for example, chapter 5.2.4 of 3GPP TS 36.304 standard, which îs not described în detail here.

[0076] In some embodiments, the serving cell measurement parameter satisfying the mode transition trigger préparation condition includes: SrxIev<N, Squal<N and this lasting for a duration T, where these parameters are obtained according to RSRP/RSRQ, a value range of N is {3, 4, 5, 6}, T=PagingCycle><M, and M can be selected from a set {3,4,5}.

[0077] In some embodiments, the serving cell measurement parameter satisfying the mode transition trigger préparation condition includes: RS_SINR<Th and this lasting for a duration T, where a value range of Th is {-3, -4, -5,-6} in dB, T=PagingCycle^xM, a value range of M îs {3, 4, 5}, and RS_SINR represents an RS-SINR ofthe serving cell.

[0078] In some embodiments, the serving cell measurement parameter satisfying the mode transition trigger préparation condition includes; Srxlev<N, Squal<N, RS_SINR<Th and this lasting for a duration T, where these parameters are obtained according to RSRP/RSRQ, a value range of N îs {3, 4, 5, 6}, a value range of Th is {-3, -4, -5, -6}dB, T=PagingCyclexM, a value range of M is {3, 4, 5}, and RS_SINR represents an RS-SINR of the serving celL

[0079] In some embodiments, the mode transition System information pre-reading process may further include following steps.

[0080] In step A, the UE maintains a normal idle State workflow to perform tasks such as monitoring paging and cell reselection évaluation, where normal task sequences such as idle state sleep, wake-up, synchronization resumption, paging monitoring, and measurement are 14 included. Details of step A can be referred to patent application No, CN201810972554.6, which is titled SLEEP AND WAKE-UP SYNCHRONOUS RESUMPTION METHOD AND DEVICE FOR TERMINAL, which are not repeated here,

[0081] In step B, based on the mode transition trigger préparation condition being satisfied, a workflow of the UE is referred to FIG, 3, A différence from FIG, 2 lies in that original sleep préparation task and sleep task can be replaced by reading SIB1-BR and other S1B information of the serving cell after a last wake-up task cycle ends, untîl the normal idle state task is resumed after the reading is ail completed,

[0082] FIG. 3 is an application scénario diagram of a signal réception method for a UE in an idle-state according to an embodiment. Referring to FIG. 3, a subframe (m-1) used for executing the sleep préparation task is used for determining the mode transition trigger condition, and the subframe used for executing the sleep task can be used for pre-reading System information, that is, receiving System information. In a previous subframe of a PO subframe (such as a subframe (n+M-1) in the figure), task handover may be performed, and this subframe can be used as a task handover gap. Further, after the UE complétés the measurement, the mode transition trigger condition may be determined, and the System information pre-reading may be continued. Those skilled in the art could understand that a duration of the System information pre-reading may be shorter than a UE sleep duration specified in existing standards. In this case, the UE may enter the sleep préparation and the sleep state after completing the System information pre-reading.

[0083] in step B, the mode transition trigger préparation condition détermination process may be adjacent to an end time point of the wake-up task (inciuding synchronîzatîon resumption, paging monitoring and measurement) in the regular idle State task sequence, which is used for periodically determining whether the mode transition trigger préparation condition is satisfied.

[0084[ In some embodiments, when the System information pre-reading has been started and has not ended, the mode transition trigger préparation condition détermination process is no longer performed.

[0085] In some embodiments, when the System information pre-reading has been started and has not ended, the mode transition trigger préparation condition détermination process continues to be performed, but even if the periodic détermination finds that the mode transition trigger préparation condition is no longer satisfied, the pre-reading of System information that has been started îs not interrupted.

[0086] In some embodiments, when the pre-reading of System information has been started and has not ended, the mode transition trigger préparation condition détermination process continues to be performed. If the periodic détermination finds that the mode transition trigger préparation condition is no longer satisfied, the already activated pre-reading of System information is înterrupted immediately, and the normal idle State workflow is resumed.

[0087] In some embodiments, after the pre-reading of the System information is completed, the normal idle State workflow is immediately resumed.

[0088] In some embodiments, when the pagîng monitoring identifies that the termina! needs to transition to the connected State, ail the above steps are înterrupted.

[0089] After the UE obtains complété System information for enhanced coverage, îf the signal quality of the serving cell satisfies the mode transition trigger condition, the mode transition is triggered to use the enhanced coverage mode to camp on a network.

[0090] In some embodiments, the mode transition is triggered when the S criterion satisfies the serving cell unavailabilîty condition.

[0091] In some embodiments, when RS_SfNR<Thl and this lasts for a duration TI, mode transition is triggered. A value range of Thl is {-5, -6, -7, -8} in dB, Tl=PagingCyclexQ, a value range of Q is {3, 4, 5}, and RS_SINR represents the RS-SINR ofthe serving cell.

[0092] In some embodiments, when the S criterion satisfies the serving cell unavailabilîty condition, RS_SINR<Th! and this lasts for a duration Tl, the mode transition is triggered, a value range of Thl is {-5, -6, -7, -8} in dB, Tl=PagingCycle^xQ, a value range of Q is (3, 4, 5}, and RS_SINR represents the RS-SINR of the serving cell.

[0093] In the below embodiment, the UE is in the enhanced coverage mode.

[0094] First, after the UE reads MIB, the UE may continue to read SIB1-BR message of enhanced coverage, and détermine whether the S criterion for enhanced coverage is satisfied based on Q_rxlevminCE/Q_rxlevminCEl and Q_qualminCE/Q_qualminCEl information in the SIB1-BR message. If it is not satisfied, it indicates that the current cell is unavailable, and the UE will jump to a network search process. Otherwise, the UE may camp on a network in the enhanced coverage mode, perform normal idle State tasks, and monitor a measurement parameter of the serving cell in real time.

[0095] The serving cell measurement parameter may include, but is not limited to, RSRP, RSRQ and RS-SINR.

[0096] Secondly, if the measurement parameter of the serving cell satisfies the mode transition trigger préparation condition and no better cell reselection event occurs, the UE may start a mode 5 transition system information pre-reading procedure to obtain SIB1-BR and other SIBs of the current cell.

[0097] In some embodiments, the serving cell measurement parameter satisfying the mode transition trigger préparation condition includes: Srxlev>N_s Squal>N and this lasting for a duration T, where these parameters are obtaîned according to RSRP/RSRQ, Q_rxlevmin and ίο Q_qualmin, a value range of N is {-6, -5, -4, -3}, T=PagingCyciexM, a value range of M is {3,4,5}, Q_rxlevmin represents a minimum required réception level in the cell, and Q_qualmin represents a minimum required quality level in the cell.

[0098] In some embodiments, the serving cell measurement parameter satisfying the mode transition trigger préparation condition includes: RS_SINR>Th and this lasting for a duration T, 15 where a value range of Th is {-6, -5, -4, -3} in dB, T=PagingCyclexM, a value range of M is {3, 4, 5}, and RS_SINR represents an RS-SINR of the serving cell.

[0099] in some embodiments, the serving cell measurement parameter satisfying the mode transition trigger préparation condition includes: Srxlev>N, Squal>N, RS_SINR>Th and this lasting for a duration T, where these parameters are obtained according to RSRP/RSRQ, 20 Q_rxlevmin and Q_qualmin, a value range of N is {-6, -5, -4, -3}dB, a value range of Th is {-6, 5, -4, -3}dB, T=PagingCycle^xM, a value range of M is {3,4,5}, RS_S1NR represents an RSSINR of the serving cell, Q_rxlevmin represents a minimum required réception level in the cell, and Q_qualmjn represents a minimum required quality level in the cell.

[00100] In some embodiments, the mode transition system information pre-reading process 25 may further include following steps.

[00101] In step Al, the UE maintains a normal îdle State workflow to perform tasks which is similar as FIG. 2 and not described here. Details of step A can be referred to patent application No. CN201810972554.6, which is titled SLEEP AND WAKE-UP SYNCHRONOUS RESUMPTION METHOD AND DEVICE FOR TERMINAL.

[00102] In step Bi, based on the mode transition trigger préparation condition being satisfîed, original sleep préparation task and sleep task are replaced by reading SI B1-BR and other Si B information of the serving cell after a last wake-up task cycle ends, until the normal idle State task is resumed after the reading is ail completed.

[00103] After the UE obtains complété system information for regular coverage, the mode transition is triggered to use the regular coverage mode to camp on a network.

[00104] In some embodiments, the mode transition is triggered when the S criterion satisfies the serving cell regular coverage condition.

[00105] In some embodiments, when RS_SINR>Th2 and this lasts for a duration Tl, mode transition is triggered. A value range of Th2 is {-3,-4,-5,-6} in dB, Tl=PagingCycle*Q, a value range of Q is {3, 4, 5}, and RS_S1NR represents the RS-S1NR of the serving cell.

[00106] In some embodiments, when the S criterion satisfies the serving cell regular coverage condition, RS_SINR>Th2 and this lasts for a duration Tl, the mode transition is triggered, a value range of Th2 is {-6, -5, -4, -3} in dB, Tl=PagingCycle*Q, a value range of Q is {3, 4, 5}, and RS_SfNR represents the RS-SINR of the serving cell.

[00107] From above, the embodiments of the présent disclosure enable] the UE supporting enhanced coverage to achieve optimal mobility expérience in an idle State. The présent disclosure is especially suitable for operator deployment environment in which LTE coverage enhancement technology is widely used for the whole network deployment. Generally, compared with existing methods, the larger the operator deployment environment the LTE coverage enhancement technology adopts, the better the idle State mobility expérience can be provided for users.

[00108] FIG. 4 is a structural diagram of a signal réception apparatus for a UE in an idle-state according to an embodîment. The signal réception apparatus 4 for the UE in the idle-state may be applied to a terminal, such as a UE.

[00109] In some embodiments, the signal réception apparatus 4 includes: a monitoring circuitry 41 configured to monitor signal quality of a serving cell; and a receiving circuitry 42 configured to détermine and receive system information matching the signal quality based on the signal quality.

[00110] Working prînciples and modes of the signal réception apparatus 4 may be referred to the above descriptions of FIG. 1, and are not described in detail here.

looiii] ln an embodiment of the présent disclosure, a storage medium having computer instructions stored therein is provided, wherein when the computer instructions are executed, the above method as shown in FIG. 1 is performed. In some embodiments, the storage medium may be a computer readable storage medium, and may include a non-volatile or a non-transïtory 5 memory, or include a ROM, a RAM, a magnetic disk or an optical disk.

[00112] In an embodiment of the présent disclosure, a terminal including a memory and a processor is provided, wherein the memory has computer instructions stored therein, and when the processor executes the computer instructions, the above method as shown in FIG. 1 is performed. In some embodiments, the terminal may be a UE.

[00113] Although the présent disclosure has been disclosed above with reference to preferred embodiments thereof, it should be understood that the disclosure is presented by way of example only, and not limitation. Those skîlled in the art can modify and vary the embodiments without departing from the spirit and scope of the présent disclosure.

Claims (11)

1. A signal réception method for a User Equipment (UE) în an idle-state, comprising:

monitoring signai quality of a serving cell; and determining and receiving System information matching the signal quality based on the signal quality.

2. The method according to claim 1, wherein said determining and receiving system information matching the signal quality based on the signal quality comprises:

determining a mode transition trigger préparation condition that the signal quality satisfîes, wherein the mode transition trigger préparation condition corresponds to a candidate coverage category;

determining the candidate coverage category and system information corresponding to the candidate coverage category based on the mode transition trigger préparation condition; and receiving the system information corresponding to the candidate coverage category.

3. The method according to claim 2, wherein said receiving the System information corresponding to the candidate coverage category comprises:

based on the mode transition trigger préparation condition being satisfied. receiving the system information corresponding to the candidate coverage category after paging monitoring and measurement are performed, wherein said receiving the system information corresponding to the candidate coverage category further comprises:

stopping determining whether the signal quality of the serving cell satisfîes the mode transition trigger préparation condition during réception of the System information corresponding to the candidate coverage category; or continuing to détermine whether the signal quality of the serving cell satisfîes the mode transition trigger préparation condition during réception of the system information corresponding to the candidate coverage category, and based on the signal quality no longer meeting the mode transition trigger préparation condition, not înterrupting the System information currentiy being received, or interrupting the System information currently being received immediately and entering a sleep préparation State; or based on the paging monitoring identifying that the UE will transition from the idle State to a connected State, stopping determining whether the signal quality ofthe serving cell satisfies the 5 mode transition trigger préparation condition.

4. The method according to claim 2, wherein the serving cell is in a regular coverage mode, and the signal quality of the serving cell satisfying the mode transition trigger préparation condition comprises:

Srxlev<N, Squal<N and this lastîng for a duration T, T=PagingCyclexM,

10 where N is a positive integer greater than I, M is a positive integer greater than 1, Srxlev represents a cell sélection réception category factor in dB, Squal represents a cell sélection quality factor în dB, Srxlev and Squal are caiculated based on the signal quality, T represents the duration, and PagingCycle represents a paging cycle; or

RS_SINR<Th and this lastîng for a duration T, T=PagingCycle^xM, where Th is a négative 15 integer, M is a positive integer greater than 1, RS_SINR represents a reference signal Signal to Interférence plus Noise Ratio (SIN R) in dB, and PagingCycle represents a paging cycle; or

Srxlev<N, Squal<N, RS_SINR<Th and this lastîng for a duration T, T=PagingCycle*M, where N is a positive integer greater than 1, Th is a négative integer, M is a positive integer greater than 1, Srxlev represents a cell sélection réception category factor in dB, Squal represents 20 a cell sélection quality factor in dB, Srxlev and Squal are both caiculated based on the signal quality, RS_SINR represents a reference signal S IN R in dB, T represents the duration, and PagingCycle represents a paging cycle.

5. The method according to claim 1, further comprising:

determining whether the signal quality of the serving cell satisfies the mode transition 25 trigger préparation condition; and based on the signal quality of the serving cell satisfying the mode transition trigger préparation condition, performîng coverage mode transition, wherein the coverage mode transition comprises a transition from a regular coverage mode to an enhanced coverage mode, or a transition from the enhanced coverage mode to the regular 3Q coverage mode.

6. The method according to claim 5, wherein the serving cell is in the regular coverage mode, and the signal quality of the serving cell satisfying the mode transition trigger préparation condition comprises:

S criterion satisfying a serving cell unavailabilîty condition; or

5 a reference signal SfNR of the serving cell satisfying a foilowîng condition: RS_SINR<Thl and this lasting for a duration Tl, Tl =PagingCyclexQ, where RS_S1NR represents the reference signal SINR, Tl represents the duration, and Thl is a négative integer; or, the S criterion satisfying the serving cell unavailabilîty condition, and the reference signal SINR of the serving cell satisfying a foilowîng condition: RS _SINR<Thl and this lasting for a ίο duration Tl, TI =PagingCycle^xQ, where RS_SINR represents the reference signal SINR, Tl represents the duration, and Thl is a négative integer.

7. The method according to claim 2, wherein said receiving the system information corresponding to the candidate coverage category comprises:

based on the signal quality of the serving cell satisfying the mode transition trigger 15 préparation condition and a cell reselection event being not started, receiving the system information corresponding to the candidate coverage category.

8. The method according to claim 2 or 7, wherein the serving cell is in an enhanced coverage mode, and the signal quality of the serving cell satisfying the mode transition trigger préparation condition comprises:

20 Srxlev>N, Squal>N and this lasting for a duration T, T=PagingCyclexM, where N is a négative integer, Misa positive integer greater than 1, Srxlev represents a cell sélection réception category factor in dB, Squal represents a cell sélection quality factor in dB, Srxlev and Squal are both calculated based on the signal quality, Q_rxlevmin and Q_qualmin, T represents the duration, PagingCycle represents a paging cycle, Q_rxlevmin represents a 25 minimum required réception level in the cell, and Q_qualmin represents a minimum required quality level in the cell; or

RS_SINR> Th and this lasting for a duration T, T=PagingCyclexM, where Th is a négative integer, M is a positive integer greater than 1, RS_SINR represents a reference signal SINR in dB, and PagingCycle represents a paging cycle; or

Srxlev> N, Squal>N, RS_SINR>Th and this lasting for a duration T, T= PagingCyclexM, where N is a négative integer, Th is a négative integer, Srxlev represents a cell sélection réception category factor in dB, Squal represents a cell sélection quality factor in dB, Srxlev and Squal are both calculated based on the signal quality, Q_rxlevmin and Q_qualmin, T represents

5 the duration, PagingCycle represents a paging cycle, M is a positive integer greater than 1, Q_rxlevmin represents a minimum requîred réception level in the cell, Q_qualmin represents a minimum required quality level in the cell, and RS_SINR represents a reference signal SINR in dB.

9. The method according to claim 5, wherein the serving cell is in an enhanced coverage mode, 10 and the signal quality of the serving cell satisfying the mode transition trigger préparation condition comprises:

S criterion satisfying a regular coverage condition of the serving cell; or an SINR of a reference signal of the serving cell satisfying a following condition: RS_SINR>Th2 and this lasting for a duration Tl, Tl=PagingCycle^xQ, where Tl represents a 15 duration of RS_SINR>Th2, PagingCycle represents a paging cycle, RS_SINR represents a reference signal SINR, and Th2 is a négative integer; or the S criterion satisfying a serving cell unavaîlability condition, and the SINR of the reference signal of the serving cell satisfying a following condition: RS_SINR>Th2 and this lasting for a duration Tl, where RS_SINR represents the SINR of the reference signal, Tl

20 represents a duration of RS_SlNR>Th2, Tl=PagingCyclexQ_f PagingCycle represents a paging cycle, and Th2 is a négative integer.

10. A storage medium having computer instructions stored therein, wherein when the computer instructions are executed, the method of any one of claims 1 to 9 is performed.

11. A terminal comprising a memory and a processor, wherein the memory has computer 25 instructions stored therein, and when the processor executes the computer instructions, the method of any one of claims l to 9 is performed.