Control channel monitoring process

Abstract

The present application relates to methods, systems and devices related to digital wireless communication, and more specifically to technologies related to a control channel monitoring process. In an exemplary aspect, a method for wireless communication is disclosed. The method includes detecting the occurrence of an event by a terminal. The method also includes selecting a monitoring configuration by the terminal based on the occurrence of the event. The method also includes resetting or stopping any one of a first timer and / or a second timer by the terminal based on the occurrence of the event. The method also includes monitoring a control channel by the terminal according to the selected monitoring configuration.

Description

Technical Field

[0001] This patent document relates generally to wireless communications. Background Art

[0002] Mobile communication technologies are moving the world towards an increasingly connected and networked society. The rapid growth of mobile communications and technological advances have led to increased demand for capacity and connectivity. Other aspects such as energy consumption, equipment cost, spectrum efficiency, and latency are also important to meet the needs of various communication scenarios. Various technologies are being discussed, including new methods for providing higher quality services. Summary of the invention

[0003] This document discloses methods, systems, and devices related to digital wireless communications, and more particularly discloses techniques related to control channel monitoring procedures.

[0004] In one exemplary aspect, a method for wireless communication is disclosed. The method includes selecting a monitoring configuration by a terminal based on the occurrence of an event. The method also includes resetting any one of a first timer and / or a second timer by the terminal based on the occurrence of the event. The method also includes monitoring a control channel by the terminal according to the selected monitoring configuration.

[0005] In another exemplary aspect, a wireless communication device including a processor is disclosed. The processor is configured to implement the methods described herein.

[0006] In yet another exemplary aspect, the various techniques described herein may be embodied as processor-executable code and stored on a computer-readable program medium.

[0007] The details of one or more implementations are set forth in the accompanying appendices, drawings, and the description that follows. Other features will be apparent from the description and drawings, and from the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1A is a block diagram illustrating a first example for physical downlink control channel (PDCCH) monitoring.

[0009] Figure 1B is a block diagram of an example of PDCCH monitoring with DRX configuration.

[0010] Figure 2 is an example block diagram of two subsets of a search space set included in the same search space set.

[0011] Figure 3 is an example block diagram of two subsets of a search space set that do not include the same search space set.

[0012] Figure 4Ais an exemplary block diagram of a first method for transitioning PDCCH monitoring behavior based on a two-level timer.

[0013] Figure 4B is an exemplary block diagram of a second method for transitioning PDCCH monitoring behavior based on a two-stage timer.

[0014] Figure 5A is an example block diagram of a first method of two-stage timer based PDCCH monitoring behavior transition with reduced timer operation.

[0015] Figure 5B is an example block diagram of a second method of two-stage timer based PDCCH monitoring behavior transition with reduced timer operation.

[0016] Fig. 6A is an example block diagram of a first method of two-stage timer based PDCCH monitoring behavior transition with reduced timer operation.

[0017] Figure 6B is an example block diagram of a second method of two-stage timer based PDCCH monitoring behavior transition with reduced timer operation.

[0018] Figure 7 The present invention is an example block diagram of a PDCCH monitoring behavior transition between two PDCCH monitoring behaviors with self-looping based on an event trigger of a two-stage timer.

[0019] Figure 8 The figure is an example block diagram of a PDCCH monitoring behavior transition between multiple PDCCH monitoring behaviors triggered by a two-level timer event.

[0020] Fig. 9 The figure is an example block diagram of a PDCCH monitoring behavior transition between multiple PDCCH monitoring behaviors triggered by a two-level timer event.

[0021] Fig.10 is a block diagram of an example method for controlling a channel monitoring process.

[0022] Fig.11 An example of a wireless communication system in which the technology according to one or more embodiments of the present technology can be applied is shown.

[0023] Fig.12 A block diagram representation of a portion of a hardware platform. DETAILED DESCRIPTION

[0024] The development of a new generation of wireless communications, namely 5G New Radio (NR) communications, is part of the continued evolution of mobile broadband to meet the growing network demands. NR will provide greater throughput to allow more users to connect simultaneously. Other aspects such as energy consumption, equipment cost, spectrum efficiency, and latency are also important to meet the needs of various communication scenarios.

[0025] In many long-term evolution (LTE) and 5G new radio access technology (NR) communication systems, user equipment (UE) may need information to identify or locate uplink scheduling grant information for sending physical uplink shared channel (PUSCH) data and downlink scheduling allocation information for receiving physical downlink shared channel (PDSCH) data. This information can be included in downlink control information (DCI) and sent to the UE by the base station on the PDCCH channel in different DCI formats. Therefore, the UE can first monitor the PDCCH.

[0026] The operation of UE monitoring PDCCH can be performed on the control resource set and the PDCCH monitoring opportunity for the search space set. The relevant monitoring parameters of PDCCH can be included in the SearchSpace information element (IE), which can be included in the radio resource control (RRC) signaling. searchSpaceId and controlResourceSetId can be included in the SearchSpace IE to indicate the search space set index and the index of the CORESET associated with the search space set, respectively. The searchSpaceType included in the SearchSpace IE can indicate the search space type of the PDCCH that the UE needs to monitor, which may include a common search space and a UE-specific search space corresponding to different DCI formats. DCI formats 0-0 and 1-0, DCI formats 2-0, DCI formats 2-1, DCI formats 2-2, and DCI formats 2-3 can be included in the common search space, and DCI formats 0-1 and 1-0, DCI formats 0-1 and 1-1, DCI formats 0-2 and / or DCI formats 1-2, or DCI formats 3-0 and / or 3-1 can be included in the UE-specific search space. For UEs supporting Release 16, DCI formats 2-4 / 2-5 / 2-6 may also be included in the common search space, and DCI formats 2-0 and 2-5 may also be included in the IAB-MT specific search space (MSS).

[0027] Each DCI format and the radio network temporary identifier (RNTI) that can be used to scramble the CRC of the DCI can have a unique purpose, and information of different functions in the DCI is identified as different fields. The fields defined in the DCI format can be mapped to information bits a0 to a1.A-1 Each field may be mapped in the order in which it appears in the description (including zero padding bits, if any), with the first field mapped to the lowest order information bit, a0, and each subsequent field mapped to a higher order information bit. The most significant bit of each field may be mapped to the lowest order information bit of that field, e.g., the most significant bit of the first field is mapped to a0.

[0028] The duration included in the SearchSpace IE may include T s <k s The duration of the PDCCH monitoring period is k time slots and the PDCCH monitoring offset is 0. s The monitoringSymbolsWithinSlot included in the SearchSpaceIE may indicate the first symbol used for PDCCH monitoring within the time slot used for PDCCH monitoring.

[0029] For the bitmap indication of the parameter monitoringSymbolsWithinSlot, the most significant bit (leftmost bit) may represent the first OFDM in the slot, and the second most significant bit (next leftmost bit) may represent the second OFDM symbol in the slot. A bit set to 1 may identify the first OFDM symbol of a control resource set within a slot. For example, for DCI format 2_0, if the duration of the CORESET identified by controlResourceSetId (in the IE ControlResourceSet) indicates 3 symbols, the first symbol applies, if the duration of the CORESET identified by controlResourceSetId indicates 2 symbols, the first two symbols apply, and if the duration of the CORESET identified by controlResourceSetId indicates 1 symbol, the first three symbols apply.

[0030] If monitoringSymbolsWithinSlot instructs the UE to monitor PDCCH in a subset of up to three consecutive symbols that are the same in each slot of all search space sets in which the UE monitors PDCCH, then the UE may not expect to be configured with a PDCCH subcarrier spacing (SCS) other than 15kHz if the subset includes at least one symbol after the third symbol. The UE may not expect to be provided with the first symbol and multiple consecutive symbols of a control resource set (CORESET) that result in PDCCH candidates being mapped to symbols of different slots. The UE may not expect any two PDCCH monitoring opportunities (MO) on the activated DL BWP in the same CORESET for the same search space set or different search space sets to be separated by a non-zero number of symbols less than the CORESET duration.

[0031] The specific PDCCH monitoring timing can be obtained as follows. For the search space set s, if Then the UE can determine that the number is n f The frame number is There is a PDCCH monitoring opportunity in the time slot of Start at T s In the next k consecutive time slots, PDCCH is monitored for the search space set s, and s -T s The PDCCH may not be monitored for the search space set s in consecutive time slots.

[0032] When the DRX cycle is configured, the activation time (Active Time) may include various times. For example, the activation time may include the time when drx-onDurationTimer or drx-InactivityTimer or drx-RetransmissionTimerDL or drx-RetransmissionTimerUL or ra-ContentionResolutionTimer is running. As another example, the activation time may include the time when a scheduling request is sent on the PUCCH and is pending. As another example, the activation time may include the time when a PDCCH indicating a new transmission of the C-RNTI addressed to the media access control (MAC) entity has not been received after successfully receiving the following random access response: the random access response is for a random access preamble that the MAC entity did not select in a contention-based random access preamble.

[0033] The MAC entity may be configured by RRC to have a DRX function that controls the UE's PDCCH monitoring activity for C-RNTI, CI-RNTI, CS-RNTI, INT-RNTI, SFI-RNTI, SP-CSI-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI, TPC-SRS-RNTI, etc. of the MAC entity. When using DRX operation, the MAC entity may also monitor the PDCCH as needed. When in RRC_CONNECTED, if DRX is configured, the MAC entity may use DRX operation to discontinuously monitor the PDCCH for all activated service cells. Alternatively, the MAC entity may monitor the PDCCH.

[0034] In many cases, power saving techniques for 5G NR may include a wake-up indication indicated by DCI format 2-6, which may indicate to the UE to wake up or not wake up in the next long DRX cycle. The UE's physical layer may then send this value to the MAC layer (higher layer) to determine whether to start the drx-onDuration timer in the next long DRX cycle.

[0035] The minimum applicable scheduling offset indication indicated by DCI format 0-1 / 1-1 may indicate the minimum time gap between a PDCCH and a PDSCH or PUSCH scheduled by the PDCCH. For example, the time slot offset (K0) of the PDSCH may be defined as the time gap between the PDCCH and the PDSCH it schedules. The time slot offset (K2) of the PUSCH may include the time gap between the PDCCH and the PUSCH it schedules. This may allow the UE to relax the PDCCH decoding process time to reduce some decoding power consumption.

[0036] The indication of a sleep-like behavior transition on a Scell ​​indicated by DCI format 2-6 / 0-1 / 1-1 can trigger the UE to perform sleep behavior on certain Scells. If the UE is indicated with a "0" value for an activated SCell in the corresponding configured SCell group, the UE can switch from a non-sleep BWP to a sleep BWP for that SCell. Otherwise, if the UE is indicated with a "1" value and the current activated DL BWP is a sleep DL BWP, the UE can switch from a sleep BWP to a non-sleep BWP for that SCell. The sleep BWP and the non-sleep BWP can be configured by higher-layer parameters.

[0037] The search space set switching indication indicated by DCI format 2-0 may indicate one of two search space sets for PDCCH monitoring scheduled on the serving cell. The UE may monitor the PDCCH according to the search space set with the indicated group index.

[0038] In many long term evolution (LTE) and 5G new radio access technology (NR) communication systems, a user equipment (UE) can determine resources for data transmission based on scheduling information in a physical downlink control channel (PDCCH). The UE may need to continuously monitor the PDCCH during the PDCCH monitoring opportunity to avoid missing any data scheduling information. Figure 1A 1 is a block diagram 100a showing a first example for PDCCH monitoring. The PDCCH monitoring timing may be determined by the following parameters: a period ks, a duration Ts in the period, and an offset Os associated with the start position of the period (eg, with T s = 1 time slot and k s = PDCCH monitoring behavior for 2 time slots, such as Figure 1A shown). Figure 1B 100b is a block diagram of an example of PDCCH monitoring with DRX configuration. A discontinuous reception (DRX) mechanism may be introduced, which may ensure that the UE avoids some PDCCH monitoring power consumption during the DRX-off period (e.g., Figure 1B However, even if a wake-up signal for instructing the UE to monitor or not monitor the PDCCH during the next DRX-on duration can be introduced to ensure that the UE avoids PDCCH monitoring in the entire DRX cycle when there is no data scheduling, for a sparse service model with a DRX configuration, especially for a longer DRX cycle configuration, the UE's PDCCH monitoring behavior may consume unnecessary power consumption during the DRX activation time.

[0039] In many cases, some PDCCH monitoring behavior transition schemes can be indicated by physical layer (L1) signaling. These schemes can provide dynamic PDCCH monitoring behavior transitions for UEs during activation time to help UEs adapt to different types of data transmission and reduce unnecessary PDCCH monitoring power consumption. However, the PDCCH monitoring behavior transition indicated by L1 signaling may increase the overhead of L1 signaling. In addition, if the UE does not detect L1 signaling, it may cause ambiguity in the PDCCH monitoring behavior between the gNB and the UE.

[0040] Since the high-level parameters are configured per cell or per cell group when a cell group is configured, the time at which the UE switches the search space set group may be different for different BWPs with different SCSs. This may lead to a vague understanding of the time when the search space set group after the BWP with different SCS is switched is applied, especially when a cell group is configured or a BWP switching is triggered. Therefore, for the case where the timer triggers the search space set group switching, it is necessary to solve the problem of when the UE starts switching the search space set group or monitoring the PDCCH according to the search space set group.

[0041] For UEs supporting NR-U, since no time indication occurs, the UE may not have available time domain resources. For this case, it may not be necessary to allow DCI format 2-0 to present the Slot Format Indicator (SFI) field to the UE. Therefore, the issue of what existence conditions the SFI field can be configured in DCI format 2-0 can be solved.

[0042] Systematic review

[0043] This embodiment relates to a control channel monitoring process, which can use one or more timers to trigger the UE to switch the PDCCH monitoring behavior and reduce the PDCCH monitoring power consumption. The timer-based PDCCH monitoring behavior change solution does not increase the L1 signaling overhead and can help the UE automatically change the PDCCH monitoring behavior.

[0044] A wireless communication method performed by a wireless device may include selecting a monitoring behavior for a control channel based on detection of an event. The monitoring behavior may be selected from a plurality of monitoring behaviors for one or more control channels. The method may also include monitoring the control channel according to the monitoring behavior.

[0045] The event may include timer expiration, and the monitoring behavior may include search space set groups configured by higher layer parameters. The timer may be configured to decrement or increment after a slot of subcarrier spacing (SCS). The SCS may be the minimum SCS among the SCSs of all configured DL and / or UL bandwidth parts (BWPs) in the configured serving cell.

[0046] If a serving cell group is configured, the SCS may be the minimum SCS among the SCSs of all configured DL and / or ULBWPs in the serving cell group.

[0047] When the UE detects the PDCCH, the timer may be decremented or incremented after a unit duration. The unit may be the unit of the timer.

[0048] PDCCH can carry DCI formats in type 3 common search space and UE-specific search space.

[0049] The event may be a DCI format 2-0 indicating a search space set group switch. For UEs supporting NR-U, a slot format indicator (SFI) may be present in DCI format 2-0 when the available RB set indicator is configured and the channel occurrence time (COT) duration indicator is not configured, when the available RB set indicator is not configured and the COT duration indicator is configured, and / or when the available RB set indicator is configured and the COT duration indicator is configured.

[0050] The event may be a DCI format 2-0 indicating a search space set group switch. For UEs supporting 5G NR, a slot format indicator (SFI) may be present in DCI format 2-0 when the available RB set indicator is not configured and the channel occurrence time (COT) duration indicator is not configured, when the available RB set indicator is not configured and the COT duration indicator is configured, and / or when the available RB set indicator is configured and the COT duration indicator is configured.

[0051] The control channel may be a PDCCH, and the monitoring behavior may include a PDCCH monitoring behavior.The monitoring behavior may include a set of search space sets that can be used by the UE to monitor the PDCCH.

[0052] The PDCCH monitoring parameters of the monitoring behavior include any of the following: search space type, PDCCH monitoring frequency, PDCCH monitoring opportunity granularity, the number of available symbols Nsymb in a time slot for PDCCH monitoring, and / or a duration Ts not less than 0.

[0053] The PDCCH monitoring frequency fs may represent the duration divided by the PDCCH monitoring period. The PDCCH monitoring granularity gs may represent the number of monitoring opportunities for the total search space set during the PDCCH monitoring period.

[0054] Multiple monitoring behaviors can be configured through high-layer parameters of the UE. Multiple monitoring behaviors can be classified according to any of the following: the value of the PDCCH monitoring period ks is greater than a threshold, the value of the duration Ts is less than a threshold; and / or the maximum monitoring frequency fs is less than a threshold.

[0055] The detection event may include a two-stage timer triggering method. This may include the UE switching the PDCCH monitoring behavior between two PDCCH monitoring behaviors in the configured PDCCH monitoring behavior. The two PDCCH monitoring behaviors may include a first PDCCH monitoring behavior and a second PDCCH monitoring behavior.

[0056] The event may include detecting that the value of the first timer or the second timer has decremented to a threshold.The first timer may be configured and decremented in milliseconds or time slots relative to a reference BWP.

[0057] After detecting the specific PDCCH, the second timer may be decremented by 1. The specific PDCCH may belong to a type 3 common search space set or a UE-specific search space type.

[0058] In some cases, the minimum gap between two candidate values ​​of the first timer may be no less than 1 ms. The minimum gap between two candidate values ​​of the second timer may be no less than 1. The second timer may include an integer representing the number of times the PDCCH is detected.

[0059] The PDCCH may belong to a type 3 search space or a UE-specific search space.

[0060] If the value of the first timer decreases to a threshold or increases to a value of the first timer configured by a higher layer parameter, the first PDCCH monitoring behavior may be switched to the second PDCCH monitoring behavior.

[0061] If the value of the second timer decreases to a threshold or increases to the value of the first timer configured by a higher layer parameter, the second PDCCH monitoring behavior may be switched to the first PDCCH monitoring behavior.

[0062] The value of the first timer may be reset to the value of the first timer configured by an upper layer parameter according to at least one parameter. The parameter may include any one of the following: a second timer, a current PDCCH monitoring behavior, expiration of a drx-Inactivity timer, expiration of a drx-onDuration timer, and / or detection of a DCI format capable of indicating a transition in PDCCH monitoring behavior.

[0063] In some embodiments, when DRX is configured, the first timer may be a drx-onDuration timer.

[0064] In some embodiments, when DRX is configured, the first timer may be a drx-Inactivity timer.

[0065] The value of the second timer may be reset to the value of the second timer configured by an upper layer parameter according to at least one parameter. The parameter may include any one of the following: the first timer, the current PDCCH monitoring behavior, the expiration of the drx-Inactivity timer, the expiration of the drx-onDuration timer, and / or the detection of a DCI format capable of indicating a transition in the PDCCH monitoring behavior.

[0066] In some embodiments, the second timer is equal to 1. The unit of the second timer may be a duration corresponding to a reference SCS. In some cases, if the minimum K0 is configured by a higher layer parameter, the unit of the second timer may include a time slot or a minimum K0.

[0067] If the value of the first timer decreases to a threshold, the PDCCH monitoring behavior may be switched to a value with a larger ks or Os, or a smaller Ts, Nsymb, N MO, another PDCCH monitoring behavior with a monitoring opportunity granularity gs or a monitoring frequency fs.

[0068] If the value of the second timer decreases to the threshold, the PDCCH monitoring behavior may be switched to a smaller ks or Os, or a larger Ts, Nsymb, N MO , another PDCCH monitoring behavior with a monitoring opportunity granularity gs or a monitoring frequency fs.

[0069] In some embodiments, the threshold is equal to zero.

[0070] If the serving cell group is configured, the first timer and the second timer may be configured per serving cell or per serving cell group.

[0071] In the following, the CRC of the first type of DCI format may be scrambled by any one of: C-RNTI, MCS-C-RNTI, SP-CSI-RNTI, CS-RNTI, SL-RNTI, SL-CS-RNTI, and / or SL-L-CS-RNTI.

[0072] Hereinafter, the CRC of the second type of DCI format may be scrambled by any one of: INT-RNTI, SFI-RNTI, TPC-PUSCH-RNTI, TPC-PUCCH-RNTI, TPC-SRS-RNTI, CI-RNTI, and / or PS-RNTI.

[0073] In the following, the PDCCH monitoring period ks may also be referred to as the PDCCH monitoring period. The number of monitoring opportunities (MO) in a time slot for PDCCH monitoring may be referred to as N MO The number of available PDCCH monitoring opportunities within a slot may be determined by the configured monitoringSymbolsWithinSlot, the CORESET duration, and one or more search space sets associated with the CORESET.

[0074] In the following, the PDCCH monitoring period ks may also be referred to as the PDCCH monitoring period. The number of available symbols for PDCCH monitoring within a time slot for PDCCH monitoring may be referred to as Nsymb. The available symbols for PDCCH monitoring within a time slot may be determined by the configured monitoringSymbolsWithinSlot, the CORESET duration, and one or more search space sets associated with the CORESET.

[0075] In the following, the PDCCH monitoring frequency fs of one or more search space sets may be represented by Ts / ks or Ts*N MOThe case where fs of a search space set is smaller than fs of another search space set indicates that the PDCCH monitoring behavior according to the search space set may be sparser than the PDCCH monitoring behavior according to the other search space set.

[0076] In the following, the PDCCH monitoring opportunity granularity gs may represent the number of monitoring opportunities for one or more search space sets and related CORESETs during a certain period. The period may not be less than the maximum value of the PDCCH monitoring period and may include monitoring opportunities for different search space sets. The situation where the gs of a subset of a search space set may be less than the gs of another search space set indicates that the PDCCH monitoring behavior or opportunity according to the search space set is sparser than the PDCCH monitoring behavior or opportunity according to another search space set.

[0077] Hereinafter, PDCCH monitoring behavior may represent any one of the following behaviors: monitoring PDCCH according to a search space set, monitoring PDCCH according to a search space set within a group, monitoring PDCCH according to multiple search space sets in a search space set group, and / or monitoring PDCCH according to a parameter list related to PDCCH monitoring.

[0078] In the following, PDCCH monitoring behavior transition may represent any of the following functions: switching PDCCH monitoring behavior between different search space sets, switching PDCCH monitoring behavior between different search space set groups, switching PDCCH monitoring behavior between different parameter lists related to PDCCH monitoring, switching PDCCH monitoring behavior between different search space sets in a search space set group, and / or switching PDCCH monitoring behavior bound to behavior.

[0079] In the following, the high-layer parameter may represent radio resource control (RRC) signaling. The high-layer parameter may also represent medium access control (MAC) signaling or RRC signaling. L1 signaling may represent physical signaling or downlink control signaling, such as DCI carried by PDCCH.

[0080] In this embodiment, the PDCCH monitoring behavior transition can be triggered by a timer-based method. The timer-based method may include any of the following: a PDCCH monitoring behavior transition triggered by a combination of two timers, a PDCCH monitoring behavior transition triggered by a combination of two timers and L1 signaling, a PDCCH monitoring behavior transition triggered by a single timer, and / or a PDCCH monitoring behavior transition triggered by a combination of L1 signaling and a single timer. The timer can be configured by a high-level parameter. The L1 signaling that can be used to trigger the PDCCH monitoring behavior transition can be DCI format 0-1 and / or DCI format 1-1 and / or DCI format 0-2 and / or DCI format 1-2 and / or DCI format 2-0 and / or DCI format 2-6.

[0081] Example 1

[0082] A first example embodiment may relate to the relationship between different PDCCH monitoring behaviors.

[0083] If the UE monitors the PDCCH according to the PDCCH monitoring behavior, the UE may switch to another PDCCH monitoring behavior in the configured PDCCH monitoring behavior based on at least one event. The event may be associated with an indication of a DCI and / or a timer. A search space set may be included in different search space set groups.

[0084] When the first PDCCH monitoring behavior is denser than the second PDCCH monitoring behavior, a relationship between the two PDCCH monitoring behaviors may be provided. In some embodiments, the search space set corresponding to the first PDCCH monitoring behavior and the second PDCCH monitoring behavior may have different PDCCH monitoring parameter values ​​(e.g., including {Ts, ks, Os, Nsymb or N MO}).

[0085] In some embodiments, one search space set for a UE may be configured to determine both the first PDCCH monitoring behavior and the second PDCCH monitoring behavior.

[0086] In some embodiments, the PDCCH monitoring period ks of one or more search space sets corresponding to the first PDCCH monitoring behavior may be no greater than the PDCCH monitoring period ks corresponding to the second PDCCH monitoring behavior.

[0087] In some embodiments, the PDCCH monitoring duration Ts of one or more search space sets corresponding to the first PDCCH monitoring behavior may be no less than the PDCCH monitoring duration Ts corresponding to the second PDCCH monitoring behavior.

[0088] In some embodiments, the PDCCH monitoring granularity gs or the PDCCH monitoring frequency fs of one or more search space sets corresponding to the first PDCCH monitoring behavior may be no less than the PDCCH monitoring granularity gs or the PDCCH monitoring frequency fs corresponding to the second PDCCH monitoring behavior.

[0089] In some embodiments, the Nsymb value of one or more search space sets corresponding to the first PDCCH monitoring behavior may be no less than the Nsymb value corresponding to the second PDCCH monitoring behavior.

[0090] In some embodiments, a PDCCH monitoring offset Os of a search space set corresponding to a first PDCCH monitoring behavior may be no greater than a PDCCH monitoring offset Os of a search space set corresponding to a second PDCCH monitoring behavior.

[0091] In some embodiments, the number of candidate PDCCHs in a search space set corresponding to the first PDCCH monitoring behavior may be no less than the number of candidate PDCCHs in a search space set corresponding to the second PDCCH monitoring behavior.

[0092] In some embodiments, the maximum number of CORESETs associated with the search space set corresponding to the first PDCCH monitoring behavior may be no less than the maximum number of CORESETs associated with the search space set corresponding to the second PDCCH monitoring behavior.

[0093] In some embodiments, the search space set of the first PDCCH monitoring behavior may be included in the second PDCCH monitoring behavior.

[0094] In some embodiments, all PDCCH monitoring behaviors for handover correspond to type 3 common search space or UE-specific search space.

[0095] Example 2

[0096] The UE can be configured through two search space set subsets via high-level parameters. The first PDCCH monitoring behavior may indicate that the UE monitors the PDCCH according to the search space set in the first subset. The second PDCCH monitoring behavior may indicate that the UE monitors the PDCCH according to the search space set in the second subset. The first subset may include search space set 1 (ks=6 time slots, Os=0, Ts=2 time slots), search space set 2 (ks=6 time slots, Os=3 time slots, Ts=3 time slots). The second subset of the search space set may include search space set 1 (ks=6 time slots, Os=0, Ts=2 time slots) and search space set 4 (ks=7 time slots, Os=4 time slots, Ts=1 time slot). Regarding the specific monitoring timing Figure 2UE can be connected from number n f = 0 in the frame numbered The time slot starts at Rs SS1 = 2 slots to monitor PDCCH for search space set 1. The maximum PDCCH monitoring granularity of the first subset may be greater than the maximum PDCCH monitoring granularity of the second subset. The maximum PDCCH monitoring frequency of the first search space subset may be greater than the maximum PDCCH monitoring frequency of the second search space subset.

[0097] If the UE can switch the search space set from a denser PDCCH monitoring frequency (e.g., a first search space set subset) to a sparser PDCCH monitoring frequency (e.g., a second search space set subset), more power consumption of the PDCCH monitoring operation can be reduced and the UE can adapt the PDCCH monitoring behavior to the service in a timely manner.

[0098] Search space set 1 may be included in the first subset and the second subset. When the number of search space sets of one type is small and the UE must monitor the search space sets of this type, it may provide a flexible search space set configuration for the UE.

[0099] Figure 2 is an example block diagram 200 of two subsets of a search space set included in the same search space set. In some embodiments, the search space set of the first PDCCH monitoring behavior may not be included in the second PDCCH monitoring behavior.

[0100] Example 3

[0101] The UE can be configured through two search space set subsets through high-level parameters. The first PDCCH monitoring behavior may indicate that the UE monitors the PDCCH according to the search space set in the first subset. The second PDCCH monitoring behavior may indicate that the UE monitors the PDCCH according to the search space set in the second subset. The first subset may include search space set 1 (ks=6 time slots, Os=0, Ts=2 time slots), search space set 2 (ks=6 time slots, Os=3 time slots, Ts=3 time slots). The second subset of the search space set may include search space set 3 (ks=6 time slots, Os=0, Ts=1 time slot) and search space set 4 (ks=7 time slots, Os=4 time slots, Ts=1 time slot). Regarding the specific monitoring timing Figure 3 UE can be connected from number n f = 0 in the frame numbered The time slot starts at Ts SS1= 2 slots to monitor PDCCH for search space set 1. The maximum PDCCH monitoring granularity of the first subset may be greater than the maximum PDCCH monitoring granularity of the second subset. The maximum PDCCH monitoring frequency of the first search space subset may be greater than the maximum PDCCH monitoring frequency of the second search space subset.

[0102] If the UE can switch the search space set from a denser PDCCH monitoring frequency (e.g., a first search space set subset) to a sparser PDCCH monitoring frequency (e.g., a second search space set subset), more power consumption of the PDCCH monitoring operation can be reduced and the UE can adapt the PDCCH monitoring behavior to the service in a timely manner.

[0103] In addition, the search space sets between the first subset and the second subset may be different. This can provide a clear PDCCH monitoring behavior for the UE when the service type changes or the UE only needs to monitor fewer types of DCI formats. This method can be used in the case where the UE switches the PDCCH monitoring behavior between the search space sets in the search space set group.

[0104] Figure 3 is an example block diagram 300 of two subsets of a search space set that do not include the same search space set.

[0105] The relationship between multiple PDCCH monitoring behaviors may have different maximum or minimum PDCCH monitoring frequencies, PDCCH monitoring granularity, PDCCH monitoring period and / or PDCCH monitoring duration. In some embodiments, the UE may switch the PDCCH monitoring behavior between multiple PDCCH monitoring behaviors. In some embodiments, multiple PDCCH monitoring behaviors may have different PDCCH monitoring parameter values.

[0106] In some embodiments, multiple PDCCH monitoring behaviors may have different search space types. In some embodiments, the same search space type between multiple PDCCH monitoring behaviors may have different maximum or minimum PDCCH monitoring parameters. In some embodiments, the values ​​of the PDCCH monitoring parameters in multiple PDCCH monitoring behaviors may be less than different thresholds. Wherein the threshold is used to distinguish between multiple PDCCH monitoring behaviors. In some embodiments, the values ​​of the PDCCH monitoring parameters in multiple PDCCH monitoring behaviors may be less than different thresholds.

[0107] The PDCCH monitoring parameters may include a PDCCH monitoring period ks, an offset Os, a duration Ts, a PDCCH monitoring opportunity granularity gs, a PDCCH monitoring frequency fs, a number of available symbols Nsymb in a time slot for PDCCH monitoring, and a number of PDCCH monitoring opportunities N MO .

[0108] The first example may include L1 signaling and a timer for triggering a search space set group switch. For DRX configuration, if a high-level parameter configures a search space set group list for the UE, the UE may be instructed to perform a search space set group switch via DCI or a timer. In some embodiments, the number of search space set groups is configured by a high-level parameter.

[0109] In some embodiments, when the higher layer parameters are configured to instruct or trigger the UE to perform a search space set group switching operation, the UE may switch the search space set group between two search space set groups in the search space set group list. The list of search space set groups may be configured by the higher layer parameters.

[0110] The first option may include DCI format 2-0 to indicate SS group switching for UEs with DRX configuration. When higher layer parameters configure the location of the search space set switching field in DCI format 2-0 for each UE, search space set group switching may be indicated for a group of UEs via DCI format 2-0.

[0111] In some embodiments, a flag may be used to indicate whether the DCI format 2-0 detected by the UE has an SFI field. In some embodiments, when a high-layer parameter configures the position of the search space set switching field in the DCI format 2-0 for the UE and the position of the SFI field may not be configured or the UE ignores the SFI field, the flag may be present in the DCI format 2-0.

[0112] In some embodiments, this flag may be used to indicate whether the search space set switch field is present only in DCI format 2-0.

[0113] In some embodiments, this flag may be present in DCI format 2-0 when higher layer parameters configure the location of the search space set switch field in DCI format 2-0 for the UE.

[0114] In some embodiments, if a higher layer parameter configures the location of the field of the flag, the flag may be indicated by DCI format 2-0.

[0115] In some embodiments, the flag may be configured for the UE by a higher layer parameter. In some embodiments, if the search space set switching flag is configured by a higher layer parameter, the UE may detect a DCI format 2-0 that includes a search space set switching field and does not include an SFI field. In some embodiments, if the higher layer parameter does not configure the search space set switching flag, the UE may detect a DCI format 2-0 that includes a search space set switching field and an SFI field.

[0116] In some embodiments, when the UE is not configured or the flag is not indicated, the UE determines the slot format. In some embodiments, when the UE detects DCI format 2-0 and the position of the SFI field is not configured and the search space set group switching flag is configured, the UE determines the symbol set of the slot indicated to the UE as flexible or as a slot format configured by a higher layer parameter.

[0117] In some embodiments, when the UE detects DCI format 2-0 and the position of the SFI field is not configured or the flag is configured, the UE determines the symbol set of the time slot indicated to the UE as flexible or as a time slot format configured by a higher layer parameter.

[0118] When the UE only needs a search space set group switching indication, this embodiment can reduce the overhead of DCI format 2-0.

[0119] The second option may include using a timer to indicate SS group switching for a UE with a DRX configuration. The timer may trigger a search space set group switch for the UE. The timer value may be configured by a higher layer parameter. If the UE monitors the PDCCH according to the first search space set group, then when the timer expires, the UE may switch to the second search space set group.

[0120] In some embodiments, the timer decrements by 1 after the timeslot for the reference SCS.

[0121] In some embodiments, the timer is configured and decremented in units of reference SCS. In some embodiments, if a cell group is configured, the reference SCS is the minimum reference SCS among all BWPs in the primary cell or cell group. In some embodiments, the reference SCS is the minimum SCS of {15, 30, 60} kHz.

[0122] In some embodiments, the timer is configured in milliseconds (ms). In some embodiments, the timer may be a drx-Inactivity timer, and when the drx-Inactivity timer expires, the UE may switch from the first search space set group to the second search space set group.

[0123] If the UE meets any of the following conditions, the timer may be reset to a value configured by a higher layer parameter. In some embodiments, if the UE monitors the PDCCH according to the second search space set group, the timer may be reset, and when the UE detects the PDCCH indicating the first search space set group, the UE may switch to the first search space set group. In some embodiments, if the UE monitors the PDCCH according to the second search space set group, the timer may be reset, and when the UE detects the PDCCH scheduling data transmission within a certain period, the UE may switch to the first search space set group.

[0124] In some embodiments, the period is a DRX-onDuration. In some embodiments, the period is an activation time. In some embodiments, if a serving cell group is configured, a timer is configured for the serving cell or serving cell group.

[0125] The timer may start to be decremented or incremented by the UE when the UE meets the following conditions. In some embodiments, if the UE monitors the PDCCH according to the second search space set group, the timer may be started, and when the UE detects the PDCCH indicating the first search space set group, the UE may switch to the first search space set group. In some embodiments, if the UE monitors the PDCCH according to the second search space set group, the timer may be started, and when the UE detects the PDCCH scheduling data transmission within a certain period of time, the UE may switch to the first search space set group.

[0126] A third option may include using a scheduling DCI format to indicate SS set group switching for UEs with DRX configuration. In some embodiments, if higher layer parameters configure search space set group switching, DCI formats 0-1 may be used to indicate search space set group switching through the search space set group switching field.

[0127] In some embodiments, if the high-level parameters configure search space set group switching, the search space set group switching may be indicated using DCI format 1-1 through the search space set group switching field. In some embodiments, the UE may report HARQ-ACK information for the search space set group switching indication detected in DCI format 1-1. The scheduling DCI may be DCI format 0-2 or DCI format 1-2.

[0128] A fourth option may include using a non-scheduled DCI format to indicate SS set group switching for UEs with DRX configuration. In some embodiments, if the position of the search space set group switching field is configured by a higher layer parameter, DCI formats 2-6 may be used to indicate the search space set group for a group of UEs. In some embodiments, if the bitmap indication of the configured multiple SCell groups is configured by a higher layer parameter, the search space set group switching field is immediately after the bit position of the wake-up indication field or the SCell sleep behavior field.

[0129] In some embodiments, when the UE monitors the PDCCH according to the first search space set group, the search space set group switch field is present in DCI formats 2-6.

[0130] In some embodiments, when a wake-up indication of DCI format 2-6 indicates that the physical layer of the UE sends a wake-up indication to the MAC layer, the search space set group switching field is present in DCI format 2-6.

[0131] In some embodiments, when DCI format 2-6 indicates that the UE switches from a first search space set group to a second search space set group, the search space set group switch field is present in DCI format 2-6.

[0132] In some embodiments, when the wake-up indication of DCI format 2-6 instructs the physical layer of the UE to send a not wake-up indication to the MAC layer, the search space set group switching field does not exist in DCI format 2-6.

[0133] In some embodiments, when the UE monitors the PDCCH according to the second search space set group, the search space set group switch field is not present in DCI formats 2-6.

[0134] The UE may be instructed to switch search space set groups by at least one of the options listed above. The method may provide the UE with more flexible operation and freedom to adapt PDCCH monitoring behavior. In addition, the method may also provide the UE with PDCCH monitoring switching functionality during the activation time during the DRX cycle.

[0135] This embodiment may be directed to avoiding ambiguity in the timer decrement for search space set switching. Because the duration of a time slot is related to the SCS of the BWP, the timer value may be decremented in units of SCS.

[0136] In some embodiments, the timer value is decremented after the time slot of the reference SCS. In some embodiments, the timer value is configured and decremented in units of the reference SCS. In some embodiments, the reference SCS is the minimum SCS in the configured BWP in the cell. In some embodiments, if a cell group is configured, the reference SCS is the minimum SCS in the configured BWP in the cell group.

[0137] In some embodiments, the configured BWP represents a DL BWP configured for the UE.

[0138] In some embodiments, if a cell group is configured, the reference SCS is the minimum SCS among all activated BWPs in the cell or cell group. In some embodiments, the reference SCS is the minimum SCS of {15, 30, 60, 120} kHz. In some embodiments, when the UE detects a DCI format in a type 3 common search space or a UE-specific search space, the timer may be decremented after an application delay. In some embodiments, when the UE detects a PDCCH, the timer may be decremented after a unit duration. Where the unit is the unit of the timer. In some embodiments, the PDCCH may carry a DCI format in a type 3 common search space or a UE-specific search space. In some embodiments, the application delay may be multiple symbols.

[0139] By using one of these methods, the UE can configure or decrement the timer in units of slot numbers, since the duration of one slot of the minimum SCS is an integer multiple of the duration of one slot of another larger SCS. In some embodiments, if a cell group is configured, the reference SCS is the maximum SCS in the configured BWP in the cell or cell group. In some embodiments, the reference SCS is the maximum SCS of {15, 30, 60, 120} kHz.

[0140] In some embodiments, the configured BWP represents a DL BWP configured for the UE.

[0141] By using one of these methods, the UE can configure or decrement the timer in units no larger than a time slot, because the duration of one time slot of the largest SCS is less than the duration of one time slot of other smaller SCSs. In some embodiments, the SFI field in DCI format 2-0 is present when the available RB set indicator is configured and the COT duration indicator is configured.

[0142] For UEs supporting NR-U, this method can ensure that the communication between the UE and other devices is not interrupted. In some embodiments, when the available RB set indicator is configured and the COT duration indicator is not configured, the SFI field in DCI format 2-0 exists. For UEs supporting NR-U, this method can help the UE evaluate the radio link quality / status in advance. In some embodiments, when the available RB set indicator is not configured and the COT duration indicator is configured, the SFI field in DCI format 2-0 exists.

[0143] For UEs supporting NR-U, this method can help the UE relax the PDCCH processing time because the DCI format does not indicate the available RBs. In some embodiments, the SFI field in DCI format 2-0 exists when the available RB set indicator is not configured and the COT duration indicator is not configured. For UEs supporting or not supporting NR-U, this method can keep the UE synchronized with the time slot format of the channel it expects to occupy.

[0144] In some embodiments, the SFI field in DCI format 2-0 is present when at least one condition is met. Example conditions may include the available RB set indicator is not configured and the COT duration indicator is not configured, the available RB set indicator is configured and the COT duration indicator is not configured, the available RB set indicator is not configured and the COT duration indicator is configured, and / or the available RB set indicator is configured and the COT duration indicator is configured.

[0145] Example 4

[0146] A fourth example embodiment may relate to quantities related to two-stage timer parameters, the parameters including values, units, and configurations related to the two-stage timer.

[0147] In some embodiments, when the UE detects a DCI indicating a transition in the PDCCH monitoring behavior, the UE starts decrementing / increasing the first timer or the second timer after a plurality of symbols. In some embodiments, when the UE starts running the drx-onDuration timer, the UE starts decrementing / increasing the first timer or the second timer. In some embodiments, when the UE starts running the drx-Inactivity timer, the UE starts decrementing / increasing the first timer or the second timer.

[0148] In some embodiments, the unit of the first timer is milliseconds representing continuous time. In some embodiments, the unit of the second timer is an integer representing the number of specific PDCCHs detected by the UE within the duration of the first timer. In some embodiments, the first timer decrements after a time slot of a reference SCS. In some embodiments, the first timer decrements after a certain span. In some embodiments, the first timer decrements after a certain time slot. In some embodiments, the first timer decrements after a monitoring opportunity.

[0149] In some embodiments, the first timer is decremented in units of three symbols. In some embodiments, the second timer is decremented in units of the number of detections of a specific PDCCH. Wherein the specific PDCCH is a PDCCH in a type 3 search space or a UE-specific search space. In some embodiments, the minimum gap between two adjacent first timer values ​​is not less than 0.125 milliseconds (ms). In some embodiments, the minimum gap between two adjacent second timer values ​​is not less than 1. In some embodiments, the first timer and the second timer are configured per UE. In some embodiments, the first timer and the second timer are configured per serving cell group. In some embodiments, the second timer is predefined as 1.

[0150] For example, the timer is a first timer that is decremented and configured in units of reference SCS. In this example, if the UE detects a PDCCH, the second timer is equal to 1, and the timer is decremented by 1. In this embodiment, "timer expiration" may mean that the timer increases to a value configured by a high-level parameter or decreases to 0.

[0151] In some embodiments, the first timer expires when the first timer decrements to 0. In some embodiments, the first timer expires when DRX is configured and the timeslot is outside the activation time. In some embodiments, the first timer expires when the UE receives a DCI indicating a BWP switching behavior. In some embodiments, the first timer expires when the UE switches a BWP triggered by a timer. The timer may include a bwp-InactivityTimer.

[0152] In some embodiments, the second timer expires when the first timer decrements to 0. In some embodiments, the second timer expires when DRX is configured and the timeslot is outside the activation time. In some embodiments, the second timer expires when the UE receives a DCI indicating a BWP switching behavior. In some embodiments, the second timer expires when the UE switches a BWP triggered by a timer. Wherein the timer is bwp-InactivityTimer.

[0153] In some embodiments, the first timer is reset when the second timer decrements to 0. In some embodiments, the first timer is reset when the second timer expires. In some embodiments, the first timer is reset when the UE may switch the PDCCH monitoring behavior triggered by DCI or time-based events. In some embodiments, the second timer is reset when the first timer decrements to 0. In some embodiments, the second timer is reset when the first timer expires. In some embodiments, the second timer is reset when the UE may switch the PDCCH monitoring behavior triggered by DCI or time-based events.

[0154] In the first option, the first timer configuration or the second timer configuration can be configured in various configurations. In some embodiments, the first timer is configured per serving cell. In some embodiments, the second timer is configured per serving cell. This can provide the UE with more accurate PDCCH monitoring adaptation triggered by the timer of each serving cell. In some embodiments, after the time slot of the first timer or the second timer is decremented to 0, the UE monitors the PDCCH according to the PDCCH monitoring behavior after the switch.

[0155] In some embodiments, the first timer is configured per serving cell group. In some embodiments, the second timer is configured per serving cell group. This can provide the same PDCCH monitoring behavior for the UE across all serving cells configured by high-level parameters. In some embodiments, the PDCCH monitoring behavior transition triggered by one or more timers can be used for PDCCH monitoring in the primary serving cell and the scheduled secondary serving cell for the UE.

[0156] In some embodiments, if the UE is configured with a primary serving cell and a set of secondary serving cells, the UE may monitor the PDCCH in the first time slot of the next subframe or frame in the activated BWP of the PCell and all scheduled SCells according to the switched PDCCH monitoring behavior. This approach ensures that the UE can monitor the PDCCH simultaneously according to the same PDCCH monitoring behavior across all BWPs on each serving cell.

[0157] In some embodiments, the first timer is configured per BWP. In some embodiments, the second timer is configured per BWP. In some embodiments, if the BWP is switched, the first timer may be reset to a value configured for the switched BWP. In some embodiments, if the BWP is switched, the second timer may be reset to a value configured for the switched BWP.

[0158] In some embodiments, the first timer is configured by a high-level parameter. In some embodiments, the second timer is defined as a specific value. The specific value is an integer and is greater than 0.

[0159] Example 5

[0160] Example embodiment 5 may involve a timer-based event that triggers a PDCCH monitoring behavior transition. A first timer and a second timer may be used to trigger the UE to switch the PDCCH monitoring behavior. The first timer may be decremented or increased based on the first event, and the second timer may be decremented or increased based on the second event.

[0161] When the first timer or the second timer decreases or increases to the threshold, the UE may switch the PDCCH monitoring behavior to the other PDCCH monitoring behavior. The thresholds of the first timer and the second timer are different. The threshold cannot be less than 0, and the unit of the threshold is the same as the unit of the corresponding timer.

[0162] In some embodiments, the first timer and the second timer may be decremented or incremented based on different events. In some embodiments, with respect to a time slot, the first timer value is greater than the second timer value.

[0163] In the following embodiments, "is decremented" or "is decremented" may mean the meaning of the word "is decremented or increased" or "is decremented or increased".

[0164] The first method may include a PDCCH monitoring behavior transition between two PDCCH monitoring behaviors. In some embodiments, when the first timer decrements to 0 or increases to a value configured by a higher-level parameter, the PDCCH monitoring behavior transitions from the first PDCCH monitoring behavior to the second PDCCH monitoring behavior. In some embodiments, when the second timer decrements to 0 or increases to a value configured by a higher-level parameter, the PDCCH monitoring behavior transitions from the second PDCCH monitoring behavior to the first PDCCH monitoring behavior.

[0165] The first timer may expire when the first timer is decremented to 0 or increased to a value configured by a higher layer parameter. The second timer may expire when the second timer is decremented to 0 or increased to a value configured by a higher layer parameter.

[0166] The first method of PDCCH monitoring behavior change Figure 4A and Figure 4B When the PDCCH monitoring behavior changes, both the first timer and the second timer may be reset. When the UE monitors the PDCCH according to the first PDCCH monitoring behavior, the UE may stop decrementing / increasing the second timer. When the UE monitors the PDCCH according to the second PDCCH monitoring behavior, the UE may stop decrementing / increasing the first timer. For example, a PDCCH monitoring state without self-looping is as follows: Figure 4A shown.

[0167] Figure 4A 400a is an example block diagram of a first two-stage timer-based PDCCH monitoring behavior transition. The first timer may be reset when the second timer expires, and the second timer may be reset when the second timer expires. When the UE monitors the PDCCH according to the first PDCCH monitoring behavior, the UE may continue to decrement / increase the second timer. When the UE monitors the PDCCH according to the second PDCCH monitoring behavior, the UE may continue to decrement / increase the first timer. For example, a PDCCH monitoring state with a self-loop such as Figure 4Bshown.

[0168] Figure 4B FIG. 4 is a block diagram 400b of an example of a second PDCCH monitoring behavior transition based on a two-stage timer. The method can help the UE to adapt the PDCCH monitoring behavior more flexibly by using a two-stage timer for each PDCCH monitoring behavior state. Figure 4B The method shown can decouple the two timers. If the scheduled data transmission remains in the same state, Figure 4B The method can also avoid frequent changes in PDCCH monitoring behavior. For example, when the UE performs the first PDCCH monitoring behavior, the traffic is more intensive.

[0169] The second method for changing the PDCCH monitoring behavior Figure 5A and Figure 5B When the PDCCH monitoring behavior is switched from the second PDCCH monitoring behavior to the first PDCCH monitoring behavior, only the second timer can be reset. When the PDCCH monitoring behavior is switched from the first PDCCH monitoring behavior to the second PDCCH monitoring behavior, only the first timer can be reset.

[0170] In some embodiments, if the UE monitors the PDCCH according to the first PDCCH monitoring behavior, the second timer may not be decremented / increased. In some embodiments, if the UE monitors the PDCCH according to the second PDCCH monitoring behavior, the first timer may not be decremented / increased.

[0171] If the UE monitors the PDCCH according to the first monitoring behavior, the UE may stop running the first timer, and if the second timer expires, the UE may switch the PDCCH monitoring behavior to the second PDCCH monitoring behavior. If the UE monitors the PDCCH according to the first monitoring behavior, the UE may stop running the second timer, and if the first timer expires, the UE may switch the PDCCH monitoring behavior to the first PDCCH monitoring behavior. If the UE switches the PDCCH monitoring behavior to the second PDCCH monitoring behavior, the UE may reset the first timer. If the UE switches the PDCCH monitoring to the first PDCCH monitoring behavior, the UE may reset the second timer.

[0172] Figure 5A FIG. 5 is an example block diagram 500a of a first two-stage timer-based PDCCH monitoring behavior transition with reduced timer operation. Figure 5AIn the embodiment of the present invention, when the PDCCH monitoring behavior change is triggered, only one of the two timers may need to be reset. When the UE monitors the PDCCH according to the first PDCCH monitoring behavior, the second timer may not be required to be decremented. When the UE monitors the PDCCH according to the second PDCCH monitoring behavior, the first timer may not be required to be decremented. Not only can the timer reset operation and the timer decrement operation be reduced, but the first timer and the second timer can also be decoupled.

[0173] In some embodiments, if the UE monitors the PDCCH according to the first PDCCH monitoring behavior and the second timer expires, the first timer may be reset. In some embodiments, if the UE monitors the PDCCH according to the second PDCCH monitoring behavior and the first timer expires, the second timer may be reset.

[0174] If the UE monitors the PDCCH according to the first monitoring behavior, the UE may continue to run the first timer, and if the second timer expires, the UE may switch the PDCCH monitoring behavior to the second PDCCH monitoring behavior. If the UE monitors the PDCCH according to the first monitoring behavior, the UE may continue to run the second timer, and if the first timer expires, the UE may switch the PDCCH monitoring behavior to the first PDCCH monitoring behavior. If the UE switches from the first PDCCH monitoring behavior to the second PDCCH monitoring behavior, the UE may reset the first timer. If the UE switches from the second PDCCH monitoring to the first PDCCH monitoring behavior, the UE may reset the second timer.

[0175] Figure 5B FIG. 5 is an example block diagram 500b of a second two-stage timer-based PDCCH monitoring behavior transition with reduced timer operation. Figure 5A In the present invention, the self-loop of the two timers is used for the transition of the PDCCH monitoring behavior, and when the transition of the PDCCH monitoring behavior is triggered, only one of the two timers may need to be reset. If the UE monitors the PDCCH according to the first PDCCH monitoring behavior, the first timer can be reset when the second timer counts down to 0. If the UE monitors the PDCCH according to the second PDCCH monitoring behavior, the second timer can be reset when the first timer counts down to 0. Not only can the timer reset operations be reduced, but also the UE can be prevented from being in the same PDCCH monitoring behavior for a long time. This method can ensure that the UE avoids monitoring the PDCCH according to the PDCCH monitoring behavior for a long time, and can reduce power consumption more when the business is slightly intensive.

[0176] Other methods can be based on the second method of PDCCH monitoring behavior change, such as Fig. 6A and Figure 6BAs shown. When the PDCCH monitoring behavior is switched from the second PDCCH monitoring behavior to the first PDCCH monitoring behavior, only the second timer can be reset. When the PDCCH monitoring behavior is switched from the first PDCCH monitoring behavior to the second monitoring behavior, the first timer can be reset.

[0177] Fig. 6A 600a is an example block diagram of a first two-stage timer-based PDCCH monitoring behavior transition with a reduced timer operation. In some embodiments, if the UE monitors the PDCCH according to the first PDCCH monitoring behavior, the first timer should be reset when the second timer expires. If the UE monitors the PDCCH according to the second PDCCH monitoring behavior, the first timer may not be decremented, such as Fig. 6A This may enable the UE to continuously monitor the PDCCH for a longer period of time according to the first PDCCH monitoring behavior, thereby avoiding an increase in delay.

[0178] Figure 6B 600b is an example block diagram of a second two-stage timer-based PDCCH monitoring behavior transition with a reduced timer operation. In some embodiments, if the UE monitors the PDCCH according to the second PDCCH monitoring behavior, the second timer should be reset when the first timer expires. If the UE monitors the PDCCH according to the first PDCCH monitoring behavior, the second timer is not decremented, such as Figure 6B This may enable the UE to continuously monitor the PDCCH for a longer period of time according to the second PDCCH monitoring behavior, thereby further reducing power consumption.

[0179] Example 6

[0180] In some cases, the UE may be configured with DRX. The first timer may be configured for 9 ms and the second timer may be configured for 3 ms. The value of the first timer may be decremented by 1 after 1 ms and the second timer may be decremented by 1 after a slot in which the UE detects a PDCCH within a type 3 common search space set or a UE-specific search space set during the activation time.

[0181] The first PDCCH monitoring behavior may indicate a 1-slot monitoring duration in a 2-slot monitoring cycle, and the second PDCCH monitoring behavior may indicate a 1-slot monitoring duration in a 4-slot monitoring cycle. Figure 7 To explain.

[0182] First, the UE may monitor the PDCCH according to the second PDCCH monitoring behavior. The UE may switch the PDCCH monitoring behavior from the second PDCCH monitoring behavior to the first PDCCH monitoring behavior after the time slot in which the second timer is decremented to 0. When the UE starts to monitor the PDCCH according to the first PDCCH monitoring behavior, the second timer and the first timer may be reset.

[0183] Then, after the time slot in which the first timer is decremented to 0, the UE may switch the PDCCH monitoring behavior from the first PDCCH monitoring behavior to the second PDCCH monitoring behavior, and the second timer is reset.

[0184] Figure 7 The diagram 700 is an example of a PDCCH monitoring behavior transition between two PDCCH monitoring behaviors with self-looping based on an event trigger of a two-stage timer. The second method may include a PDCCH monitoring behavior transition between multiple PDCCH monitoring behaviors.

[0185] In some embodiments, the unit of the first timer is ms representing continuous time. In some embodiments, the unit of the second timer is an integer representing the number of specific PDCCHs detected by the UE within the duration of the first timer. In some embodiments, the second timer is decremented in units of reference SCS. In some embodiments, the minimum gap between two adjacent first timer values ​​is not less than 0.125 milliseconds (ms). In some embodiments, the minimum gap between two available second timer values ​​is not less than 1. In some embodiments, the first timer and the second timer are configured by UE. In some embodiments, the first timer and the second timer are configured by serving cell group. In some embodiments, the second timer is predefined as 1.

[0186] In some embodiments, the number of candidate PDCCH monitoring behaviors is N. The monitoring frequencies of candidate PDCCH monitoring behaviors for a specific search space type may be different. The candidate PDCCH monitoring behaviors may be {first PDCCH monitoring behavior, second PDCCH monitoring behavior, third PDCCH monitoring behavior, ..., Nth PDCCH monitoring behavior} in descending order based on the value of the monitoring frequency. The specific search space type may include at least one of a type 3 common search space and a UE-specific search space.

[0187] In some embodiments, when the first timer counts down to a value equal to the threshold S n-1 When the value of S is , the PDCCH monitoring behavior changes from the (n-1)th PDCCH monitoring behavior to the nth PDCCH monitoring behavior. n-1 May be related to the first timer and have the same units as the first timer.

[0188] In some embodiments, when the second timer counts down to a value equal to the threshold D n-1 When the value of , the PDCCH monitoring behavior changes from the nth PDCCH monitoring behavior to the (n-1)th PDCCH monitoring behavior. n-1 May be related to, and have the same units as, the second timer.

[0189] The first timer {S1, S2, ..., S n-1 The threshold of} can satisfy S1>S2>…>S n-1 The thresholds of the second timer {D1, D2, ..., D n-1} can satisfy D1<D2<...<D n-1 .

[0190] In some embodiments, DCI may use 1 bit to indicate the PDCCH monitoring behavior transition between multiple PDCCH monitoring behaviors. It can reduce the overhead of L1 signaling.

[0191] In some embodiments, the DCI may use ceil(log2(N)) bits to indicate the PDCCH monitoring behavior transition between multiple PDCCH monitoring behaviors. The UE may be instructed to switch the PDCCH monitoring behavior between multiple PDCCH monitoring behaviors more flexibly.

[0192] In some embodiments, the PDCCH monitoring behavior transitions from the first PDCCH monitoring behavior to the nth PDCCH monitoring behavior when the first timer decrements to a value equal to 0. In some embodiments, the PDCCH monitoring behavior transitions from the nth PDCCH monitoring behavior to the first PDCCH monitoring behavior when the second timer decrements to a value equal to 0.

[0193] In some embodiments, if the UE monitors the PDCCH according to the first PDCCH monitoring behavior, when the second timer expires, the first timer and the second timer are reset. In some embodiments, the UE may switch the PDCCH monitoring behavior from the current PDCCH monitoring behavior to the first PDCCH monitoring behavior, and when the second timer expires, the first timer is reset. The current PDCCH monitoring behavior may be a PDCCH monitoring behavior other than the first PDCCH monitoring behavior in the PDCCH monitoring behavior.

[0194] Example 7

[0195] Four candidate PDCCH monitoring behaviors are configured for the UE. The monitoring frequencies fs of the four PDCCH monitoring behaviors can satisfy fs 1st >f s 2nd >fs3rd >fs 4th . DCI can use one bit to instruct the UE to switch the PDCCH monitoring behavior. The value of this one bit can instruct the UE to switch the PDCCH monitoring behavior between two different PDCCH monitoring behaviors. The threshold {S1, S2, S3} of the first timer satisfies S1>S2>S3 and S3>0. For different types of PDCCH monitoring behaviors, the DCI indication value of the PDCCH monitoring behavior transition can represent different information, and the PDCCH monitoring behavior after switching triggered by DCI is determined by both the DCI indication and the current PDCCH monitoring behavior.

[0196] For example, if the UE monitors the PDCCH according to the first PDCCH monitoring behavior and the DCI indicates a "0" value, the UE may switch the PDCCH monitoring behavior to the fourth PDCCH monitoring behavior. Otherwise, if the UE monitors the PDCCH according to the first PDCCH monitoring behavior and the DCI indicates a "1" value, the UE may switch the PDCCH monitoring behavior to the second PDCCH monitoring behavior.

[0197] For example, if the UE monitors the PDCCH according to the third PDCCH monitoring behavior and the DCI indicates a "0" value, the UE can switch the PDCCH monitoring behavior to the fourth PDCCH monitoring behavior. Otherwise, if the UE monitors the PDCCH according to the first PDCCH monitoring behavior and the DCI indicates a "1" value, the UE can switch the PDCCH monitoring behavior to the first PDCCH monitoring behavior. This method can not only help the UE adapt to multiple PDCCH monitoring behaviors, but also reduce the overhead of L1 signaling indicated by 1 bit.

[0198] Figure 8 The present invention is an example block diagram 800 of a PDCCH monitoring behavior transition between multiple PDCCH monitoring behaviors triggered by a two-level timer event. In some embodiments, if the UE monitors the PDCCH according to the nth PDCCH monitoring behavior, when the first timer expires, the first timer and the second timer are reset. In some embodiments, the UE may switch the PDCCH monitoring behavior from the current PDCCH monitoring behavior to the nth PDCCH monitoring behavior, and when the first timer expires, the second timer is reset. The current PDCCH monitoring behavior may be a PDCCH monitoring behavior from the first PDCCH monitoring behavior to the (n-1)th PDCCH monitoring behavior.

[0199] Example 8

[0200] Four candidate PDCCH monitoring behaviors are configured for the UE. The monitoring frequencies fs of the four PDCCH monitoring behaviors satisfy fs 1st >fs2nd >fs 3rd >fs 4th . DCI can use one bit to instruct the UE to switch the PDCCH monitoring behavior. The value of this one bit can instruct the UE to switch the PDCCH monitoring behavior between two different PDCCH monitoring behaviors. The threshold {D1, D2, D3} of the second timer satisfies D1>D2>D3 and D3>0. For different types of PDCCH monitoring behaviors, the DCI indication value of the PDCCH monitoring behavior transition can represent different information, and the PDCCH monitoring behavior after switching triggered by the DCI is determined by both the DCI indication and the type of the current PDCCH monitoring behavior.

[0201] For example, if the UE monitors the PDCCH according to the fourth PDCCH monitoring behavior and the DCI indicates a "0" value, the UE may switch the PDCCH monitoring behavior to the third PDCCH monitoring behavior. Otherwise, if the UE monitors the PDCCH according to the first PDCCH monitoring behavior and the DCI indicates a "1" value, the UE may switch the PDCCH monitoring behavior to the first PDCCH monitoring behavior.

[0202] For example, if the UE monitors the PDCCH according to the third PDCCH monitoring behavior and the DCI indicates a "0" value, the UE can switch the PDCCH monitoring behavior to the fourth PDCCH monitoring behavior. Otherwise, if the UE monitors the PDCCH according to the first PDCCH monitoring behavior and the DCI indicates a "1" value, the UE can switch the PDCCH monitoring behavior to the second PDCCH monitoring behavior. This method can not only help the UE adapt to multiple PDCCH monitoring behaviors, but also reduce the overhead of L1 signaling indicated by 1 bit.

[0203] Fig. 9 The present invention is an example block diagram 900 of a two-level timer event triggering a PDCCH monitoring behavior transition between multiple PDCCH monitoring behaviors. When the first timer is decremented to 0, the PDCCH monitoring behavior can be transitioned from the first PDCCH monitoring behavior to the second PDCCH monitoring behavior. When the second timer is decremented to 0, the PDCCH monitoring behavior can be transitioned from the second PDCCH monitoring behavior to the first PDCCH monitoring behavior.

[0204] In some embodiments, when the first timer decrements to zero or expires, the second timer value is reset.

[0205] A third method may include a timer trigger to reduce monitoring of a portion of a search space set for the PDCCH monitoring behavior or a scaling factor of a parameter indicating the PDCCH monitoring behavior.

[0206] In some embodiments, a timer or DCI may trigger the UE to monitor the PDCCH according to a portion of the search space set of the current PDCCH monitoring behavior. In some embodiments, a first timer triggers the UE to monitor the PDCCH according to a portion of the search space set of the second PDCCH monitoring behavior. In some embodiments, a second timer triggers the UE to monitor the PDCCH according to a portion of the search space set of the first PDCCH monitoring behavior.

[0207] In some embodiments, the timer may trigger the UE to monitor the PDCCH according to the search space set of the current PDCCH monitoring behavior, at least one of the parameters of which is modified by a scaling factor, wherein the parameters include Ts, ks, Os and fs.

[0208] The first timer may trigger the UE to switch the current PDCCH monitoring behavior to other PDCCH monitoring behaviors. One of the parameters of the current PDCCH monitoring behavior may be modified by a scaling factor to generate other PDCCH monitoring behaviors.

[0209] In some embodiments, the scaling factor may be no greater than 1 and is used to generate the PDCCH monitoring period ks, duration Ts, or PDCCH monitoring offset Os.

[0210] When the first timer is decremented to a threshold, the PDCCH monitoring behavior may be transitioned from the first PDCCH monitoring behavior to the second PDCCH monitoring behavior.

[0211] When the second timer is decremented to a threshold, the PDCCH monitoring behavior may be switched from the second PDCCH monitoring behavior to the first PDCCH monitoring behavior. The threshold may include a value of 0 or a value of the first timer or the second timer configured by a higher layer parameter.

[0212] In this embodiment, the application time of the PDCCH monitoring behavior switching is not greater than the maximum value between 1 ms and the BWP switching delay.

[0213] Example Embodiment 9

[0214] Example embodiment 9 may relate to a timer trigger limit. A first timer may be decremented based on a continuous duration.

[0215] In some embodiments, after each time slot in an activated DL BWP of a serving cell without DRX configuration, the UE decrements / increments the first timer value by 1. In some embodiments, after each time slot in an activated DL BWP of a serving cell with an activation time of a DRX configuration, the UE decrements the first timer value by 1. In some embodiments, the first timer value is reset when the UE switches from outside the activation time to the activation time.

[0216] The first timer may be decremented based on consecutive monitoring occasions. In some embodiments, the UE decrements / increments the first timer value by 1 after each time slot in an activated DL BWP of a serving cell in which the UE monitors the PDCCH during a monitoring occasion according to at least one of the following search space sets: a common search space set, a UE-specific search space set.

[0217] In some embodiments, the UE decrements / increments the first timer value by 1 after each time slot in the activated DL BWP of the serving cell in which the UE monitors the PDCCH during the monitoring opportunity according to at least one of the following DCI formats: DCI format 0-0 and / or DCI format 1-0, DCI format 0-1 and / or DCI format 1-1, DCI format 0-2 and / or DCI format 1-2, DCI format 3-0, DCI format 3-1, DCI format 2-0.

[0218] The first timer may be decremented based on consecutive monitoring periods. In some embodiments, the UE decrements / increments the first timer value by 1 after each time slot in the activated DL BWP of the serving cell in which the UE monitors the PDCCH in the first time slot of the monitoring period ks according to at least one of the following search space sets: common search space set, UE-specific search space set.

[0219] In some embodiments, the UE decrements / increments the first timer value by 1 after each time slot in the activated DL BWP of the serving cell in which the UE monitors the PDCCH in the first time slot of the monitoring period ks according to at least one of the following DCI formats: DCI format 0-0 and / or DCI format 1-0, DCI format 0-1 and / or DCI format 1-1, DCI format 0-2 and / or DCI format 1-2, DCI format 3-0, DCI format 3-1, DCI format 2-0.

[0220] The first timer may be decremented based on a uniform time unit. In some embodiments, the UE decrements / increments the first timer value by 1 after each millisecond (ms) in the activated DL BWP of the serving cell. The serving cell may include a primary serving cell (PCell and SpCell) and all scheduled SCells in the SCell group.

[0221] The second timer may be decremented based on any of a plurality of events.In some embodiments, the UE decrements / increments the second timer value by 1 after each slot in an activated DL BWP of a serving cell in which the UE monitors PDCCH to detect a DCI format in a common search space and / or a UE-specific search space.

[0222] In some embodiments, the UE decrements / increments the second timer value by 1 after each time slot in the activated DL BWP of the serving cell where the UE monitors the PDCCH to detect at least one of the following DCI formats: DCI format 0-0 and / or DCI format 1-0, DCI format 0-1 and / or DCI format 1-1, DCI format 0-2 and / or DCI format 1-2, DCI format 3-0, DCI format 3-1, DCI format 2-0.

[0223] In some embodiments, the UE decrements / increments the second timer value by 1 after each time slot in an activated DL BWP of a serving cell where the UE monitors the PDCCH to detect at least one of the DCI formats that may indicate a PDCCH monitoring behavior transition functionality.

[0224] In some embodiments, the UE decrements / increments the second timer value by 1 after each time slot in an activated DL BWP of a serving cell that the UE monitors the PDCCH to detect at least one of the DCI formats that may schedule DL / UL data transmission.

[0225] PDCCH monitoring behavior switching is applied to the search space:

[0226] In some embodiments, the PDCCH monitoring behavior may include a type 3 common search space set or a UE-specific search space set. In some embodiments, the PDCCH monitoring behavior switching may be used to monitor a PDCCH belonging to a type 3 common search space or a UE-specific search space. In some embodiments, the first timer and the second timer may be used in the case where DRX is configured.

[0227] In some embodiments, the first timer and the second timer may be used in the case where the PDCCH monitoring behavior transition function may be indicated by DCI. In some embodiments, the first timer and the second timer may not be used in the case where the UE performs BWP switching. In some embodiments, when the first timer or the second timer expires, the UE performs PDCCH monitoring according to the switched PDCCH monitoring behavior after the end slot of the frame for FR1 and the subframe for FR2.

[0228] In some embodiments, the first timer or the second timer may be stopped by a higher layer parameter. In some embodiments, the timer may be stopped after a time slot when the drx-Inactivity timer expires. In some embodiments, the second timer may be stopped after a time slot when the drx-onDuration timer expires.

[0229] The first method may include: when the timer is stopped by a higher layer parameter, the UE may switch to a default PDCCH monitoring behavior. The default PDCCH monitoring behavior may be a search space set group with a default group index.

[0230] In some embodiments, the default group index is an index that is smaller than the number of search space set groups configured by higher level parameters.

[0231] In some embodiments, the default group index is the lowest index of the configured search space set group.

[0232] The second method may include: when the timer is stopped by a higher layer parameter, the UE may monitor the PDCCH according to the current PDCCH monitoring behavior. In some embodiments, the first timer or the second timer may be reset by a higher layer parameter. In some embodiments, the first timer or the second timer only runs in an activated DL BWP.

[0233] Fig.10 is a block diagram 1000 of an example method for controlling a channel monitoring procedure. The method may also include selecting, by a terminal, a monitoring configuration based on an occurrence of an event (block 1002).

[0234] The method may also include performing, by the terminal, an action related to the first timer and / or the second timer based on the occurrence of the event (block 1004). The method may also include monitoring, by the terminal, a control channel according to the selected monitoring configuration (block 1006).

[0235] In some embodiments, the first timer is decremented or incremented by 1 after milliseconds or time slots for a reference subcarrier spacing (SCS).

[0236] In some embodiments, the reference SCS comprises the minimum or maximum SCS among multiple SCSs of all configured downlink bandwidth parts (BWPs) in a serving cell or serving cell group configured for the terminal.

[0237] In some embodiments, the second timer is decremented or increased by 1 after the terminal detects a specific physical downlink control channel (PDCCH).

[0238] In some embodiments, the specific PDCCH is included in a type 3 common search space set or a UE-specific search space set.

[0239] In some embodiments, the monitoring configuration includes a set of search spaces configured by high-level parameters.

[0240] In some embodiments, the parameters of the selected monitoring configuration include at least one of the following: a search space type, a PDCCH monitoring frequency, a PDCCH monitoring opportunity granularity, the number of available symbols for PDCCH monitoring in a time slot, a PDCCH monitoring period, a PDCCH monitoring offset, and / or a duration not less than 0, wherein the PDCCH monitoring frequency represents the value obtained by dividing the duration by the PDCCH monitoring period, and wherein the PDCCH monitoring granularity represents the number of monitoring opportunities in the total search space set during the PDCCH monitoring period.

[0241] In some embodiments, the monitoring configuration includes a first monitoring configuration and a second monitoring configuration.

[0242] In some embodiments, the second monitoring configuration includes any of the following: a monitoring period larger than the monitoring period of the first monitoring configuration, a monitoring offset larger than the monitoring offset of the first monitoring configuration, a monitoring duration smaller than the monitoring duration of the first monitoring configuration, a number of available symbols smaller than the number of available symbols of the first monitoring configuration, a number of PDCCH monitoring opportunities smaller than the number of PDCCH monitoring opportunities of the first monitoring configuration, a monitoring opportunity granularity smaller than the monitoring opportunity granularity of the first monitoring configuration, and a monitoring frequency smaller than the monitoring frequency of the first monitoring configuration.

[0243] In some embodiments, the occurrence of the event includes expiration of the first timer or the second timer or detection of downlink control information (DCI) by the terminal.

[0244] In some embodiments, the terminal may monitor the PDCCH according to the selected monitoring configuration.

[0245] In some embodiments, the DCI indicates a monitoring configuration different from the current monitoring configuration of the terminal; and the terminal selects the indicated monitoring configuration. In some embodiments, if the terminal monitors the PDCCH according to the current first monitoring configuration and the first timer expires or the DCI indicates a second monitoring configuration, the terminal performs an action of stopping decrementing or increasing the first timer and selects the second monitoring configuration. The terminal should monitor the PDCCH according to the selected second monitoring configuration.

[0246] In some embodiments, if the terminal monitors the PDCCH according to the current first monitoring configuration and the first timer expires or the DCI indicates a second monitoring configuration, the terminal performs an action of resetting the value of the second timer and selects the second monitoring configuration, wherein the terminal should monitor the PDCCH according to the selected second monitoring configuration.

[0247] In some embodiments, if the terminal monitors the PDCCH according to the current second monitoring configuration and the second timer expires or the DCI indicates the first monitoring configuration, the terminal stops decreasing or increasing the second timer and selects the first monitoring configuration. The terminal should monitor the PDCCH according to the selected first monitoring configuration.

[0248] In some embodiments, if the terminal monitors the PDCCH according to the current second monitoring configuration and the second timer expires or the DCI indicates the first monitoring configuration, the terminal performs an action of resetting the value of the first timer and selects the first monitoring configuration. The terminal should monitor the PDCCH according to the selected first monitoring configuration.

[0249] In some embodiments, expiration of the first timer or the second timer includes decrementing or incrementing the first timer or the second timer to a threshold value.

[0250] In some embodiments, if the terminal switches the first monitoring configuration to the second monitoring configuration or the second timer expires, the terminal performs an action of resetting the value of the first timer.

[0251] In some embodiments, if the terminal switches the second monitoring configuration to the first monitoring configuration or the first timer expires, the terminal performs an action of resetting the value of the second timer.

[0252] In some embodiments, the first timer is reset to a value of the first timer configured by a higher layer parameter.

[0253] In some embodiments, the second timer is reset to a value of the second timer configured by a higher layer parameter.

[0254] In some embodiments, the second timer is reset to 1.

[0255] In some embodiments, the DCI corresponds to DCI format 2-0 and includes an indication to switch a set of search space sets, wherein the set of search space sets corresponds to a type 3 search space set or a terminal-specific search space set.

[0256] In some embodiments, a field of a slot format indicator (SFI) included in DCI format 2-0 is presented based on at least one of the following conditions: an available resource block (RB) set indicator is not configured and a channel occurrence time (COT) duration indicator is not configured; an available RB set indicator is not configured and a COT duration indicator is configured; an available RB set indicator is configured and a COT duration indicator is configured; and a flag regarding the SFI being presented is indicated or configured, wherein the flag is used to indicate whether the SFI field is presented in DCI format 2-0.

[0257] In some embodiments, if the capabilities of the terminal do not configure the terminal to support detection of DCI format 2-0 including a field of this flag, then this flag is not present.

[0258] In some embodiments, if the flag is configured by a higher layer parameter, the field indicating the search space set group switch is present.

[0259] In some embodiments, the monitoring configuration includes a portion of a search space set in a group of search space sets configured by higher layer parameters.

[0260] In some embodiments, the monitoring configurations in the search space set group have different thresholds, wherein the value of the PDCCH monitoring period is greater than the threshold, and / or the value of the duration is less than the threshold, and / or the maximum monitoring frequency is less than the threshold.

[0261] In some embodiments, if the first timer expires, the terminal selects a monitoring configuration having parameters modified by a scaling factor, wherein a scaling factor less than 1 is used to double the PDCCH monitoring period and a scaling factor greater than 1 is used to double the duration.

[0262] In some embodiments, if the second timer expires, the terminal selects a monitoring configuration with parameters modified by a scaling factor greater than 1 for doubling the PDCCH monitoring period and less than 1 for doubling the duration.

[0263] In some embodiments, the minimum gap between two candidate values ​​of the first timer is no less than 0.125 milliseconds, and the minimum gap between two candidate values ​​of the second timer is no less than 1.

[0264] In some embodiments, the method includes resetting, by the terminal, the first timer or the second timer based on at least one of: expiration of a discontinuous reception (DRX) inactivity timer, expiration of a drx-onDuration timer, and a DCI indicating a PDCCH monitoring configuration switch.

[0265] In some embodiments, if DRX is configured by the terminal, the first timer can be a drx-onDuration timer or a drx-Inactivity timer.

[0266] In some embodiments, the threshold is equal to zero.

[0267] In some embodiments, the first timer and / or the second timer is configured for a serving cell, or configured for a serving cell group when a serving cell group has been configured.

[0268] Example Wireless System

[0269] Fig.11 An example of a wireless communication system in which the technology according to one or more embodiments of the present technology can be applied is shown. The wireless communication system 1100 may include one or more base stations (BSs) 1105a, 1105b, one or more wireless devices or terminals 1110a, 1110b, 1110c, 1110d, and a core network 1125. The base stations 1105a, 1105b may provide wireless services to the wireless devices 1110a, 1110b, 1110c, and 1110d in one or more wireless sectors. In some implementations, the base stations 1105a, 1105b include directional antennas for generating two or more directional beams to provide wireless coverage in different sectors. The base station may implement the functionality of scheduling a cell or a candidate cell, as described in this document.

[0270] The core network 1125 can communicate with one or more base stations 1105a, 1105b. The core network 1125 provides connections with other wireless communication systems and wired communication systems. The core network may include one or more service subscription databases for storing information related to subscribed wireless devices 1110a, 1110b, 1110c and 1110d. The first base station 1105a can provide wireless services based on a first wireless access technology, and the second base station 1105b can provide wireless services based on a second wireless access technology. Depending on the deployment scenario, the base stations 1105a and 1105b can be co-located on site or installed separately on site. The wireless devices 1110a, 1110b, 1110c and 1110d can support a variety of different wireless access technologies.

[0271] In some implementations, a wireless communication system may include multiple networks using different wireless technologies. A dual-mode or multi-mode wireless device includes two or more wireless technologies that can be used to connect to different wireless networks.

[0272] Fig.1212 is a block diagram representation of a portion of a hardware platform. A hardware platform 1205, such as a network node or base station or terminal or wireless device (or UE), may include a processor electronic device 1210, such as a microprocessor, that implements one or more of the technologies presented in this document. The hardware platform 1205 may include a transceiver electronic device 1215 for sending and / or receiving wired signals or wireless signals through one or more communication interfaces (such as an antenna 1220 or a wired interface). The hardware platform 1205 may implement other communication interfaces using defined protocols for sending and receiving data. The hardware platform 1205 may include one or more memories (not explicitly shown) configured to store information such as data and / or instructions. In some implementations, the processor electronic device 1210 may include at least a portion of the transceiver electronic device 1215. In some embodiments, at least some of the disclosed techniques, modules, or functions are implemented using the hardware platform 1205.

[0273] in conclusion

[0274] The disclosed and other embodiments, modules and functional operations described in this document can be implemented using digital electronic circuit systems or computer software, firmware or hardware (including the structures disclosed in this document and their structural equivalents), or a combination of one or more thereof. The disclosed and other embodiments can be implemented as one or more computer program products (i.e., one or more computer program instruction modules) encoded on a computer-readable medium for a data processing device to execute or control the operation of the data processing device. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a material combination that affects a machine-readable propagation signal, or a combination of one or more thereof. The term "data processing device" covers all devices, equipment and machines for processing data, including, for example, a programmable processor, a computer or multiple processors or computers. In addition to hardware, the device may also include code that creates an execution environment for the computer program in question, for example, code that constitutes a processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more thereof. A propagation signal is an artificially generated signal, such as a machine-generated electrical, optical or electromagnetic signal, which is generated to encode information for transmission to a suitable receiver device.

[0275] A computer program (also referred to as a program, software, software application, script, or code) can be written in any form of programming language, including compiled or interpreted languages, and can be deployed in any form, including as an independent program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program may be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files storing one or more modules, subroutines, or partial codes). A computer program may be deployed to execute on one computer, or on multiple computers, which are located at one site or distributed on multiple sites and interconnected by a communication network.

[0276] The processes and logic flows described in this document may be performed by executing one or more computer programs by one or more programmable processors to perform functions by operating on input data and generating output. The processes and logic flows may also be performed by, and apparatus may also be implemented as, special purpose logic circuitry, such as an FPGA (field programmable gate array) or an ASIC (application specific integrated circuit).

[0277] For example, processors suitable for executing computer programs include general and special purpose microprocessors, and any one or more processors of any type of digital computer. Typically, the processor receives instructions and data from a read-only memory or a random access memory or both. The basic elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Typically, a computer will also include one or more mass storage devices (e.g., magnetic, magneto-optical disks, or optical disks) for storing data or operatively coupled to receive data from such mass storage devices or to transfer data to them or both. However, a computer need not have such a device. Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory devices, including, for example, semiconductor memory devices, such as EPROM, EEPROM, and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magneto-optical disks; and CD ROM and DVD-ROM disks. The processor and memory may be supplemented by or incorporated in a dedicated logic circuit system.

[0278] Although this patent document contains a lot of details, these should not be interpreted as limitations on the scope of any invention or what may be claimed, but rather as descriptions of features that may be specific to a particular embodiment of a particular invention. Certain features described in this patent document in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, the various features described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable sub-combination. In addition, although features may be described above as working in certain combinations and even initially claimed as such, one or more features may be removed from the claimed combination in some cases, and the claimed combination may involve sub-combinations or variations of sub-combinations.

[0279] Similarly, although operations are depicted in a particular order in the drawings, this should not be understood as requiring that these operations be performed in the particular order shown or in sequence, or that all of the operations shown be performed to obtain the desired results. In addition, the separation of various system components in the embodiments described in this patent document should not be understood as requiring such separation in all embodiments.

[0280] Only a few implementations and examples are described, and other implementations, enhancements, and variations can be made based on what is described and illustrated in this patent document.

Claims

1. A method for wireless communication, comprising: The terminal selects a monitoring configuration based on the occurrence of an event, and the terminal is configured to maintain a first timer and a second timer for triggering the terminal to switch the monitoring configuration; The terminal performs, based on the occurrence of the event, an action related to at least one of the first timer or the second timer, wherein the action comprises: (i) if the occurrence of the event is that the first timer expires, and the current monitoring configuration is the first monitoring configuration or the downlink control information DCI indicates the second monitoring configuration, and the selected monitoring configuration is the second monitoring configuration, then resetting at least the value of the second timer; or (ii) if the occurrence of the event is that the second timer expires, and the current monitoring configuration is the second monitoring configuration or the DCI indicates the first monitoring configuration, and the selected monitoring configuration is the first monitoring configuration, then resetting at least the value of the first timer; as well as The terminal monitors a control channel according to the selected monitoring configuration.

2. The method of claim 1, wherein the first timer is decremented or increased by 1 after milliseconds or time slots for a reference subcarrier spacing SCS.

3. The method according to claim 2, wherein the reference SCS is the minimum SCS among multiple SCSs of all configured downlink bandwidth parts BWP in the service cell or service cell group configured for the terminal. 4 . The method according to claim 1 , wherein after the terminal detects a specific physical downlink control channel (PDCCH), the second timer is decremented or increased by 1. 5 . The method according to claim 4 , wherein the specific PDCCH is included in a type 3 common search space set or a UE-specific search space set. The method according to claim 1 , wherein the monitoring configuration comprises a set of search space sets configured by high-level parameters.

7. A method according to claim 1, wherein the parameters used for the selected monitoring configuration include at least one of the following: search space type, PDCCH monitoring frequency, PDCCH monitoring opportunity granularity, the number of available symbols for PDCCH monitoring in a time slot, a PDCCH monitoring period, a PDCCH monitoring offset, and / or a duration not less than 0, wherein the PDCCH monitoring frequency represents the value obtained by dividing the duration by the PDCCH monitoring period, and wherein the PDCCH monitoring granularity represents the number of monitoring opportunities for the total number of search space sets during the PDCCH monitoring period.

8. The method according to claim 1, wherein the second monitoring configuration includes any one of the following: a monitoring period larger than the monitoring period of the first monitoring configuration, a monitoring offset larger than the monitoring offset of the first monitoring configuration, a monitoring duration smaller than the monitoring duration of the first monitoring configuration, a number of available symbols smaller than the number of available symbols of the first monitoring configuration, a number of PDCCH monitoring opportunities smaller than the number of PDCCH monitoring opportunities of the first monitoring configuration, a monitoring opportunity granularity smaller than the monitoring opportunity granularity of the first monitoring configuration, and a monitoring frequency smaller than the monitoring frequency of the first monitoring configuration.

9. The method of claim 1 , wherein the expiration of the first timer or the second timer comprises: The first timer or the second timer is decremented or incremented to a threshold value.

10. The method according to claim 1, wherein the first timer is reset to a value of the first timer configured by a higher layer parameter.

11. The method according to claim 1, wherein the second timer is reset to a value of the second timer configured by a higher layer parameter. The method according to claim 1 , wherein the second timer is reset to 1.

13. The method of claim 1, wherein the DCI corresponds to DCI format 2-0 and comprises an indication for switching a set of search space sets, wherein the set of search space sets corresponds to a type 3 search space set or a terminal-specific search space set.

14. The method according to claim 13, wherein a slot format indicator (SFI) field included in the DCI format 2-0 is presented based on at least one of the following conditions: The available resource block RB set indicator is not configured, and the channel occurrence time COT duration indicator is not configured; The available RB set indicator is not configured, and the COT duration indicator is configured; The available RB set indicator has been configured, and the COT duration indicator has been configured; as well as A flag that the SFI is presented is indicated or configured, wherein the flag is used to indicate whether the SFI field is presented in the DCI format 2-0.

15. The method of claim 14, wherein the flag is not presented if the capabilities of the terminal do not configure the terminal to support detection of DCI format 2-0 including the field of the flag.

16. The method of claim 14, wherein if the flag is configured by a higher layer parameter, the field indicating search space set group switching is presented.

17. The method according to any one of claims 1 and 6, wherein the monitoring configuration comprises a portion of the search space set in a search space set group configured by high-level parameters.

18. The method according to claim 17, wherein the monitoring configurations in the search space set group have different thresholds, wherein the value of the PDCCH monitoring period is greater than the threshold, and / or the value of the duration is less than the threshold, and / or the maximum monitoring frequency is less than the threshold.

19. The method of claim 1, wherein if the first timer expires, the terminal selects the second monitoring configuration having parameters modified by a scaling factor, wherein the scaling factor is less than 1 for doubling the parameters modified by the scaling factor and is greater than 1 for doubling the duration.

20. The method of claim 1, wherein if the second timer expires, the terminal selects the first monitoring configuration having parameters modified by a scaling factor, wherein the scaling factor is greater than 1 for doubling the PDCCH monitoring period, and the scaling factor is less than 1 for doubling the duration.

21. The method according to any one of claims 1, 10, and 11, wherein a minimum interval for decrementing or increasing the value of the first timer is not less than 0.125 milliseconds, and a minimum interval for decrementing or increasing the value of the second timer is not less than 1.

22. The method of claim 1, further comprising: The first timer or the second timer is reset by the terminal based on at least one of the following: expiration of a discontinuous reception DRX inactivity timer, expiration of a drx-onDuration timer, and a DCI indicating a PDCCH monitoring configuration switch.

23. The method according to claim 1, wherein if DRX is configured by the terminal, the first timer can be a drx-onDuration timer or a drx-Inactivity timer. The method of claim 9 , wherein the threshold is equal to zero.

25. The method according to any one of claims 1 to 11, wherein the first timer and / or the second timer is configured for a serving cell, or configured for a serving cell group when the serving cell group is configured.

26. An apparatus for wireless communication, comprising a processor configured to perform the method according to any one of claims 1 to 25.

27. A non-transitory computer readable medium having stored thereon code which, when executed by a processor, causes the processor to implement the method of any one of claims 1 to 25.

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