Method, device and system for monitoring control channel

Abstract

A system, method, and apparatus for control channel monitoring may include a wireless communication device that reports multiple capabilities of the wireless communication device to a wireless communication node. The wireless communication device may receive control information from the wireless communication node. The wireless communication device uses a set of search space sets (SSSs) selected from multiple search space set groups (SSSGs) to perform physical downlink control channel (PDCCH) monitoring or uses a skip duration to perform PDCCH skipping based on the control information. The number of SSSGs may be an integer N not less than 1, or each SSSG may include a number of SSSs that is at least zero and at most equal to the maximum number of SSSs configured in a bandwidth part (BWP). The number of skip duration values ​​may be an integer M greater than or equal to 0.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communications, including but not limited to methods, devices, and systems for control channel monitoring. Background Art

[0002] The third generation partnership project (3GPP), a standardization organization, is currently in the process of developing a new radio interface called 5G New Radio (5G NR) and the next generation packet core network (NG-CN or NGC). 5G NR will include three main components: 5G access network (5G-AN), 5G core network (5G Core Network, 5GC) and user equipment (UE). In order to facilitate the implementation of different data services and requirements, some components of 5GC components are software-based and some components are hardware-based so that these components can be adjusted as needed, thereby simplifying 5GC components (also known as network functions). Summary of the invention

[0003] At least one aspect relates to a system, method, apparatus, or computer-readable medium. A wireless communication device may report multiple capabilities of the wireless communication device to a wireless communication node. The wireless communication device may receive control information from the wireless communication node. The wireless communication device uses a set of search space sets (Search Space Set, SSS) selected from multiple search space set groups (Search Space Set Group, SSSG) to perform physical downlink control channel (Physical Downlink Control Channel, PDCCH) monitoring based on the control information. The number of SSSGs may be N, where N is an integer not less than 1, or each SSSG may include a number of SSSs that is at least zero and at most equal to the maximum number of SSSs configured in a bandwidth part (Bandwidth Part, BWP).

[0004] In some embodiments, the plurality of SSSGs configured in the BWP may include a Power Saving (PS) SSSG. At least one of the following applies: (i) the PS SSSG may not be configured with a search space set through higher layer signaling, or the number of search space sets in the PS SSSG is zero, (ii) the PS SSSG may be an SSSG configured with a restriction on at least one PDCCH monitoring parameter of any search space set in the PS SSSSG, wherein the restriction may include at least one of the following: (a) the bitmap of the monitoring symbol in the time slot is all zeros, (b) the duration (T s ) is 0 time slot, (c) PDCCH monitoring period (k s ) is empty, (d)k s Invalid, (d) PDCCH monitoring offset (O s ) is equal to (k s -1) time slots, (e) the starting position of the PS SSSG is the next adjacent time slot, or (f) the number of PDCCH monitoring opportunities is equal to 0, or (iii) the PS SSSG can be associated with a power saving (PS) timer, and during the operation of the PS timer, the wireless communication device does not monitor the PDCCH in the Type-3 Common Search Space (Type-3 CSS) set or the User Equipment Specific Search Space (USS) set.

[0005] The multiple SSSGs configured in the BWP may include at least one of the following items: (i) a normal SSSG, including at least one search space set of a type including a type-3 common search space (Type-3 CSS) or a user equipment specific search space (USS), or (ii) a conventional SSSG, including all search space sets configured in a downlink (DL) BWP in a cell or across a group of cells for SSSG switching or PDCCH skip bundling. A switching timer may be associated with a normal SSSG or a conventional SSSG, and the switching timer may be set to a value configured by a higher layer parameter when the wireless communication device starts monitoring PDCCH according to the normal SSSG or the conventional SSSG, or when the wireless communication device is monitoring PDCCH according to the normal SSSG or the conventional SSSG and detects any PDCCH, a PDCCH with scheduling downlink control information (Downlink Control Information, DCI), or a PDCCH with an SSSG switching indication.

[0006] SSSGs can be classified based on at least one of the following parameters:

[0007] A Radio Network Temporary Identifier (RNTI) type including at least one of the following: Cell RNTI (C-RNTI), Cancellation Indication RNTI (CI-RNTI), Configured Scheduling RNTI (CS-RNTI), Interruption RNTI (INT-RNTI), Slot Format Indication RNTI (SFI-RNTI), Semi-persistent Channel State Information RNTI (SP-CSI-RNTI), Transmit Power Control (TPC) Physical Uplink Control Channel RNTI (TPC-PUCCH-RNTI), TPC Physical Uplink Shared Channel RNTI (TPC-PUSCH-RNTI), TPC Sounding Reference Signal RNTI (TPC Sounding Reference Signal RNTI, TPC-SRS-RNTI) and Availability Indication RNTI (AI-RNTI),

[0008] a number of SSSs associated with the SSSG, the number of SSSs comprising at least one of the following values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10,

[0009] an SSS identifier (ID) comprising at least one integer value greater than or equal to 1 and less than or equal to 39,

[0010] a search space type including at least one of a Type-3 CSS type or a USS type,

[0011] a Control Resource Set (CORESET) ID associated with a group of one or more SSSs including at least one of the following values: 0, 1, 2, 3, 4, or 5,

[0012] The number or density of PDCCH monitoring opportunities during a period, the period comprising at least one of: monitoring zero time slots for each time slot, monitoring one time slot for each k .... s time slots monitors one time slot, and for each k s time slots to monitor K time slots or one time slot for each time slot, where k s is the PDCCH monitoring period, K is greater than or equal to 2 and less than or equal to (k s -1), or

[0013] k for at least one search space set in one of the multiple SSSGs s , offset O s or duration T s .

[0014] In some embodiments, the wireless communication device may perform PDCCH skipping according to a skip duration in response to at least one triggering event associated with the control information. The skip duration value may be determined among M PDCCH skip duration values ​​in a list of candidate skip duration values ​​configured via higher layer signaling, and M is an integer greater than or equal to 1.

[0015] The list of candidate skip duration values ​​may include the PDCCH monitoring period (k s ) value, or a subset of the value of the Discontinuous Reception (DRX) inactivity timer, or a subset of the value of the DRX on-duration (onDuration) timer. The skip duration value may be configured via Radio Resource Control (RRC) signaling and selected from a list of candidate skip duration values ​​configured via higher layer signaling. The difference between each pair of adjacent candidate skip duration values ​​may be at least 1 millisecond. The skip duration may be configured according to a reference subcarrier spacing (SCS) and decremented by one after each timeslot. The reference SCS configuration may be the minimum SCS configuration among all configured downlink (DL) bandwidth parts (BWP) in a serving cell or a set of serving cells. The reference SCS configuration is maintained during the operation of the skip duration.

[0016] In some embodiments, SSSG switching or PDCCH skipping between SSSGs may be triggered via an indication in downlink control information (DCI). The bit width of the indication field of the DCI is W, where W is an integer greater than or equal to 1 and is determined according to a function related to SSSG switching or PDCCH skipping or according to the value of the number of SSSGs (N) or the number of PDCCH skipping duration values ​​(M) indicated via higher layer signaling.

[0017] The leading bit or the most significant bit (MSB) of the field used to indicate SSSG switching or PDCCH skipping may be used to indicate at least one of the following: (i) enabling or disabling PDCCH monitoring according to the SSSG, or enabling or disabling SSSG switching, (ii) enabling or disabling PDCCH monitoring according to a SSSG configured with restrictions, (iii) enabling or disabling PDCCH skipping according to the skip duration, or (iv) enabling or disabling PDCCH monitoring according to all SSSs configured in the activated downlink (DL) BWP in a cell or across a group of cells bound for SSSG switching or PDCCH skipping. One or more remaining bits or non-MSBs of the field for indicating SSSG switching or PDCCH skipping may be used to indicate at least one of the following items: (a) an SSSG identifier (ID) of the SSSG to which the wireless communication device should switch to perform PDCCH monitoring, wherein the SSSG ID is determined based on the currently monitored SSSG or the value of the bit field indicating that the wireless communication device should perform SSSG switching to monitor PDCCH, (b) the value of the skip duration, (c) a regular SSSG in a cell or across a group of cells bound for SSSG switching or PDCCH skipping, or (d) an SSSG configured with the said restriction.

[0018] The wireless communication device may perform PDCCH monitoring to switch to a default SSSG after multiple triggering events or PS SSSG expiration. The multiple triggering events may be related to data processing and may be detected by the wireless communication device. The multiple triggering events may include at least one of the following items: PDCCH decoding, operation of a DRX-Retransmission Timer DL / UL timer, a Scheduling Request (SR) transmission on a Physical Uplink Control Channel (PUCCH) in a waiting state, and receiving a Random Access Response (Random Access Response) decoded using a Cyclic Redundancy Check (CRC) scrambled by a Random Access Radio Network Temporary Identifier (RA-RNTI) for a random access preamble that is not selected by a Medium Access Control (MAC) entity in a contention-based random access preamble. The expiration may include at least one of the following: a PS timer is decremented to 0 or a PS timer expires, or a duration for determining the validity time of a PS SSSG ends.

[0019] The wireless communication device may switch from PDCCH skipping to PDCCH monitoring using the default SSSG after the skip duration expires.

[0020] In the absence of any indication in downlink control information (DCI), SSSG switching to another SSSG or switching from PDCCH skipping or switching to PDCCH skipping may be triggered. The wireless communication device may perform at least one of the following: (i) switching from a normal SSSG or a regular SSSG to a PS SSSG or switching to PDCCH skipping after expiration of a switching timer, (ii) switching from a regular SSSG to a normal SSSG after expiration of a switching timer, (iii) switching from a denser normal SSSG to a sparser normal SSSG after expiration of a switching timer, wherein the SSS, or radio network temporary identifier (RNTI) type, or PDCCH monitoring timing, or T of the sparser normal SSSG is different from that of the normal SSSG. s Compared with the value of ks, or the value of ks, a denser normal SSSG includes more SSSs, or more types of radio network temporary identifiers (RNTIs), or more PDCCH monitoring opportunities, or a larger T s k s value, or (iv) when the wireless communication device detects multiple triggering events related to data processing, switching from the PS SSSG or skipping from the PDCCH to the default SSSG. The default SSSG is configured through radio resource control (RRC) signaling or is predetermined among at least one of the following: at least one normal SSSG or at least one conventional SSSG.

[0021] SSSG switching between SSSGs may include switching between SSSs belonging to at least one of a Type-3 common search space (Type-3 CSS) set and a UE-specific search space (UE-specific Search Space, USS) set. All SSSs in a conventional SSSG may include all SSSs belonging to a Type-3 CSS set and a USS set, and are configured in the DL BWP. The minimum delay for switching within an SSSG or switching to or from PDCCH skipping may be 25 symbols for capability 1 for a subcarrier spacing configuration value μ=0 / 1 / 2 or 10 / 12 / 22 symbols for capability 2 for μ=0 / 1 / 2. The minimum delay for μ=3 may be no greater than 36 symbols, and the minimum delay for μ=3 for capability 1 may be no less than the minimum delay for μ=3 for capability 2, or the minimum delay for μ=3 for both capability 1 and capability 2 may be 25 symbols.

[0022] When the wireless communication device switches to a sparser SSSG or switches to PDCCH skipping, there may be a specific duration before the wireless communication device starts PDCCH monitoring according to the sparser SSSG or PDCCH skipping, and the specific duration is triggered by at least one of the following items: (i) the wireless communication device detects an initial transmission scheduled by the PDCCH, (ii) the switching timer expires, or (iii) triggers the wireless communication device to switch to a sparser SSSG or PDCCH skipping. During the specific duration, the wireless communication device can continue PDCCH monitoring according to the current SSSG.

[0023] The specific duration may be triggered or started after the wireless communication device receives the indicated time slot in the downlink control information (DCI) or the time slot at which the switching timer expires, and may end after the time slot at which all downlink scheduled data is successfully received. The specific duration may be triggered or started after the wireless communication device receives the indicated time slot in the DCI or the time slot at which the switching timer expires, and may end after the time slot at which the most recently scheduled data is completely received by using the maximum number of retransmissions. The specific duration may be configured by radio resource control (RRC) signaling. The specific duration may be determined by a bandwidth part (BWP) switching delay. The specific duration may end after the earliest time slot between the time slot at which the most recently scheduled data is completely received by using the maximum number of retransmissions and the time slot at which all downlink scheduled data is successfully received. All downlink scheduled data is successfully received, which may include: all physical downlink shared channel (PDSCH) hybrid automatic repeat request (HARQ) processing is completed in the serving cell or across relevant component carriers (CC) for SSSG switching or PDCCH skip bundling, or all PDSCH and PUSCH processing is completed in the serving cell or across relevant CCs for SSSG switching or PDCCH skip bundling.

[0024] When discontinuous reception (DRX) is configured and the wireless communication device is performing PDCCH monitoring according to a sparser SSSG or PDCCH skipping, the wireless communication device may start PDCCH monitoring according to the default SSSG during the duration of the drx-RetransmissionTimer DL / UL operation. When discontinuous reception (DRX) is configured or the wireless communication device is performing PDCCH monitoring according to PDCCH skipping or a sparser SSSG, the wireless communication device may stop PDCCH monitoring according to PDCCH skipping or a sparser SSSG. After the wireless communication device sends a scheduling request (SR) on the physical uplink control channel (PUCCH) and the SR is pending, or after the wireless communication device successfully receives a random access response (RAR) for a random access preamble that is not selected by the media access control (MAC) entity in a contention-based random access preamble, or after the activation time is activated by an event other than the running of drx-onDurationTimer or drx-InactivityTimer, or after the wireless communication device monitors the search space set provided by recoverySearchSpaceId, the wireless communication device may start PDCCH monitoring according to the default SSSG.

[0025] When discontinuous reception (DRX) is configured or the wireless communication device is performing PDCCH monitoring according to a PDCCH skipping or sparser SSSG, the wireless communication device may stop PDCCH monitoring according to the PDCCH skipping or sparser SSSG. The wireless communication device may start PDCCH monitoring according to the default SSSG at a first time slot, which is at least after the last symbol of a scheduling request (SR) on a physical uplink control channel (PUCCH) and the SR is pending, or after the last symbol of a random access response (RAR) or PDCCH decoded with a cyclic redundancy check (CRC) scrambled by a random access radio network temporary identifier (RA-RNTI) for a random access preamble that is not selected by a medium access control (MAC) entity in a contention-based random access preamble, or after the activation time is activated by an event other than the running of a drx-onDurationTimer or a defined number of symbols.

[0026] In some embodiments, a sparser SSSG may include a group of SSSs, each SSS in the group of SSSs having fewer PDCCH monitoring opportunities or a smaller number of search space sets than other SSSs; or the default SSSG may be configured via a radio resource control (RRC) signaling parameter or predefined among at least one of the following: one or more normal SSSGs or one or more conventional SSSGs; or whether the wireless communication device should switch to the default SSSG may be configured via a radio resource control (RRC) signaling parameter.

[0027] The plurality of capabilities of the wireless communication device may include at least one of the following:

[0028] Search Space Set Group Switching with DCI-r17 indicates whether the wireless communication device supports switching among multiple groups of SSSs using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 2_2 monitoring;

[0029] searchSpaceSetGroupSwitchingwithoutDCI-r17, indicating whether the wireless communication device supports switching among multiple groups of SSSs without monitoring using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 1_2;

[0030] pdcchSkippingwithDCI-r17, indicating whether the wireless communication device supports stopping PDCCH monitoring or PDCCH skipping with DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 1_2 monitoring;

[0031] pdcchSkippingwithoutDCI-r17, indicating whether the wireless communication device supports stopping PDCCH monitoring or PDCCH skipping without using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 1_2 monitoring;

[0032] pdcch skipping capability 2-r17 (pdcchSkippingcapability2-r17), indicating whether the wireless communication device supports a minimum delay (P) for switching among SSSG or PDCCH skipping, where P = 10 / 12 / 22 / 25 symbols for a subcarrier spacing configuration value μ = 0 / 1 / 2 / 3; and if the wireless communication device supports the minimum delay, the wireless communication device will report one of the following items to the wireless communication node: searchSpaceSetGroupSwitchingwithDCI-r17, searchSpaceSetGroupSwitchingwithoutDCI-r17, pdcchSkippingwithDCI-r17, pdcchSkippingwithDCI-r17, pdcchSkippingwithDCI-r17, pdcchMonitoringAdaptationwithDCI-r17, or pdcchMonitoringAdaptationwithoutDCI-r17;

[0033] Joint Pdcch Skipping Across Cells-r17 (jointPdcchSkippingAcrossCells-r17) indicates whether the wireless communication device supports being configured with a set of cells and performing PDCCH skipping jointly across these cells. If this feature configures the wireless communication device to support, the wireless communication device will report one of the following items to the wireless communication node: pdcchSkippingwithDCI-r17 or pdcchSkippingwithoutDCI-r17;

[0034] pdcchMonitoringAdaptationwithDCI-r17, indicating whether the wireless communication device supports monitoring switching among PDCCH skipping of multiple sets of SSS and multiple different skip duration values ​​using DCI0_1 or DCI 1_1 or DCI 0_2 or DCI 2_2;

[0035] pdcchMonitoringAdaptationwithoutDCI-r17, indicating whether the wireless communication device supports switching among PDCCH skipping with multiple search space sets and multiple different skip duration values ​​without monitoring with DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 2_2;

[0036] Data Processing for PDCCH Skipping-r17 indicates whether the wireless communication device supports: monitoring the PDCCH for scheduling retransmission data, or the PDCCH for scheduling the PUSCH corresponding to the scheduling request (SR) on the physical uplink control channel (PUCCH) in the waiting state, or the PDCCH monitoring after the wireless communication device successfully receives the random access response (RAR) for the random access preamble not selected by the media access control (MAC) entity in the contention-based random access preamble, or the PDCCH during the activation time activated by an event other than the running of drx-onDurationTimer or drx-InactivityTimer, or the PDCCH monitoring after the wireless communication device monitors the search space set provided by recoverySearchSpaceId; and applying PDCCH skipping after all data is successfully received or all hybrid automatic repeat request (HARQ) processing is completed or all uplink configured grant processing is completed. If the wireless communication device is configured to support this feature, the wireless communication device shall report one of the following to the wireless communication node: pdcchSkippingwithDCI-r17, pdcchSkippingwithoutDCI-r17, pdcchMonitoringAdaptationwithDCI-r17, or pdcchMonitoringAdaptationwithoutDCI-r17;

[0037] Data Processing for search Space Switching - r17, indicating whether the wireless communication device supports monitoring the PDCCH for scheduling retransmission data, or the PDCCH for scheduling the PUSCH corresponding to the scheduling request (SR) on the physical uplink control channel (PUCCH) in the waiting state, or the PDCCH monitoring after the wireless communication device successfully receives the random access response (RAR) for the random access preamble that is not selected by the media access control (MAC) entity in the contention-based random access preamble, or the PDCCH during the activation time activated by an event other than the running of drx-onDurationTimer or drx-InactivityTimer, or the PDCCH monitoring after the wireless communication device monitors the search space set provided by recoverySearchSpaceId; and whether to support the application of SSSG switching after all data is successfully received. If the feature configures the wireless communication device to support, the wireless communication device will report one of search space switching with DCI-r17 (searchSpaceSwitchingwithDCI-r17) or search space switching without DCI-r17 (searchSpaceSwitchingwithoutDCI-r17) to the wireless communication node;

[0038] Power Saving Search Space Group Monitoring-r17 (psSearchSpaceGroupMornitoring-r17), indicating whether the wireless communication device supports PDCCH monitoring according to the Power Saving (PS) SSSG;

[0039] Search Space Group-r17 (SearchSpaceGroup-r17), indicating whether the wireless communication device supports SSSG switching between two or more groups of SSS; or

[0040] Number of search space groups-r17 (Number of search space group-r17), indicating the number of search space groups supported by the wireless communication device; or

[0041] N Number of skipping duration-r17 (Number of skipping duration-r17), indicating the number of skipping durations supported by the wireless communication device; or

[0042] pdcch Monitoring Switching Capability-r17 (pdcchMonitoringSwitchingCapability-r17), indicating whether the wireless communication device supports the minimum delay for SSSG switching or PDCCH skipping, which is 25 symbols for the subcarrier spacing μ=3.

[0043] In some embodiments, the control information may include at least one of the following items: (i) indication information of downlink control information (DCI), (ii) a switching timer associated with a normal SSSG or a regular SSSG, (iii) a power saving (PS) timer associated with a PS SSSG, (iv) a scheduling request (SR) transmission on a physical uplink control channel (PUCCH) in a waiting state, (v) a random access response (RAR) received for a random access preamble that was not selected by a media access control (MAC) entity in a contention-based random access preamble, (vi) an RRC signaling parameter configuration related to SSSG switching or PDCCH skipping, or (vii) an adaptation mode for PDCCH monitoring including SSSG switching and PDCCH skipping configured via RRC signaling.

[0044] In some embodiments, the wireless communication device is at least one of: a user equipment (UE) supporting a new radio (NR) unlicensed band, a UE with reduced capabilities, a UE supporting extended reality functions, or a UE supporting an NR band.

[0045] At least one aspect relates to a system, method, apparatus, or computer-readable medium. A wireless communication node may receive a plurality of capabilities of a wireless communication device from a wireless communication device. The wireless communication node may send control information to the wireless communication device. The wireless communication device may be configured to perform physical downlink control channel (PDCCH) monitoring using a set of search space sets (SSSs) selected from a plurality of search space set groups (SSSGs) based on the control information. The number of SSSGs may be N, where N is an integer not less than 1, or each SSSG may include a number of SSSs that is at least zero and at most equal to a maximum number of SSSs configured in a bandwidth part (BWP).

[0046] The wireless communication device may be configured to perform PDCCH skipping according to a skip duration in response to at least one triggering event associated with the control information, and the skip duration value may be determined among M PDCCH skip duration values ​​in a list of candidate skip duration values ​​configured via higher layer signaling, and M is an integer greater than or equal to 1. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Various example embodiments of the present solution are described in detail with reference to the following figures or drawings. The drawings are provided for illustrative purposes only and depict only example embodiments of the present solution to facilitate the reader's understanding of the present solution. Therefore, the drawings should not be considered as limiting the breadth, scope or applicability of the present solution. It should be noted that for clarity and ease of description, these drawings are not necessarily drawn to scale.

[0048] Figure 1 An example cellular communication network in which the technology disclosed herein may be implemented according to an embodiment of the present disclosure is shown;

[0049] Figure 2 A block diagram showing an example base station and user equipment according to some embodiments of the present disclosure is shown;

[0050] Figure 3A and Figure 3B diagrams showing example PDCCH monitoring without and with DRX, respectively, according to some embodiments of the present disclosure;

[0051] Figure 4A and Figure 4B respectively show diagrams illustrating examples of a skip scheme and a search space set (SSS) group switching scheme according to some embodiments of the present disclosure;

[0052] Figure 5A-5C shows a diagram depicting various alternatives for DCI-based PDCCH monitoring adaptation in activation time for activating BWP according to some embodiments of the present disclosure;

[0053] Figure 6 A flow chart illustrating a method for control channel monitoring according to some embodiments of the present disclosure is shown;

[0054] Figure 7 A state diagram showing a first example of two SSSG switching without utilizing DCI indication according to some embodiments of the present disclosure is shown;

[0055] Figure 8 A state diagram showing a second example of two SSSG switching without utilizing DCI indication according to some embodiments of the present disclosure is shown;

[0056] Fig. 9 A state diagram illustrating an example of switching between two SSSGs and all search space sets using DCI indications according to some embodiments of the present disclosure is shown;

[0057] Figures 10A-10D shows a state diagram depicting various scenarios of switching in PDCCH monitoring behavior using DCI indication according to some embodiments of the present disclosure;

[0058] Figures 11A-11D shows a state diagram depicting other scenarios of switching in PDCCH monitoring behavior using DCI indication according to some embodiments of the present disclosure; and

[0059] Fig. 12A and Fig. 12B Two diagrams showing two events that trigger DRX activation time are shown according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0060] Various example embodiments of the present solution are described below with reference to the accompanying drawings so that a person of ordinary skill in the art can make and use the present solution. As will be apparent to a person of ordinary skill in the art, after reading this disclosure, various changes or modifications may be made to the examples described herein without departing from the scope of the present solution. Therefore, the present solution is not limited to the example embodiments and applications described and illustrated herein. In addition, the specific order or hierarchy of steps in the methods disclosed herein are merely example solutions. Based on design preferences, the specific order or hierarchy of steps of the disclosed methods or processes may be rearranged while remaining within the scope of the present solution. Therefore, a person of ordinary skill in the art may understand that the methods and techniques disclosed herein present various steps or actions in an example order, and unless otherwise expressly stated, the present solution is not limited to the specific order or hierarchy presented.

[0061] 1. Mobile communication technology and environment

[0062] Figure 1 An example wireless communication network and / or system 100 is shown in which the techniques disclosed herein may be implemented according to an embodiment of the present disclosure. In the following discussion, the wireless communication network 100 may be any wireless network, such as a cellular network or a narrowband Internet of things (NB-IoT) network, and is referred to herein as "network 100". Such an example network 100 includes a base station 102 (hereinafter referred to as "BS 102"; also referred to as a wireless communication node) and a user equipment 104 (hereinafter referred to as UE 104; also referred to as a wireless communication device) that can communicate with each other via a communication link 110 (e.g., a wireless communication channel), and a cluster of cells 126, 130, 132, 134, 136, 138, and 140 covering a geographic area 101. Figure 1 1, BS 102 and UE 104 are contained within respective geographic boundaries of cell 126. Each of the other cells 130, 132, 134, 136, 138, and 140 may include at least one base station operating over its allocated bandwidth to provide adequate radio coverage to its intended users.

[0063] For example, BS 102 may operate on an allocated channel transmission bandwidth to provide adequate coverage to UE 104. BS 102 and UE 104 may communicate via downlink radio frames 118 and uplink radio frames 124, respectively. Each radio frame 118 / 124 may also be divided into subframes 120 / 127, which may include data symbols 122 / 128. In the present disclosure, BS 102 and UE 104 are described herein as "communication nodes" that are non-limiting examples of methods disclosed herein that may generally be practiced. According to various embodiments of the present solution, such communication nodes may communicate wirelessly and / or wired.

[0064] Figure 2 A block diagram of an example wireless communication system 200 for sending and receiving wireless communication signals (e.g., OFDM / OFDMA signals) according to some embodiments of the present solution is shown. The system 200 may include components and elements configured to support known or conventional operating features that need not be described in detail herein. In an exemplary embodiment, the system 200 may be used in a system such as Figure 1 The wireless communication environment 100 may be used to communicate (eg, send and receive) data symbols, as described above.

[0065] The system 200 generally includes a base station 202 (hereinafter referred to as "BS 202") and a user equipment 204 (hereinafter referred to as "UE 204"). The BS 202 includes a BS (base station) transceiver module 210 (hereinafter also referred to as: BS transceiver 210, transceiver 210), a BS antenna 212 (hereinafter also referred to as: antenna 212, antenna arrangement 212), a BS processor module 214 (hereinafter also referred to as: processor module 214), a BS memory module 216 (hereinafter also referred to as: memory module 216), and a network communication module 218, each of which is coupled and interconnected to each other via a data communication bus 220 as needed. The UE 204 includes a UE (user equipment) transceiver module 230 (hereinafter also referred to as: UE transceiver 230, transceiver 230), a UE antenna 232 (hereinafter also referred to as: antenna 232, antenna arrangement 232), a UE memory module 234 (hereinafter also referred to as: memory module 234), and a UE processor module 236, each of which is coupled and interconnected to each other via a data communication bus 240 as needed. BS 202 communicates with UE 204 via a communication channel 250 (hereinafter also referred to as: wireless transmission link 250, wireless data communication link 250), which may be any wireless channel or other medium suitable for data transmission as described herein.

[0066] As can be understood by those skilled in the art, the system 200 may also include Figure 2Any number of modules outside the modules shown. It will be appreciated by those skilled in the art that the various illustrative blocks, modules, circuits, and processing logic described in conjunction with the embodiments disclosed herein can be implemented in hardware, computer-readable software, firmware, or any actual combination thereof. In order to clearly illustrate the interchangeability and compatibility of hardware, firmware, and software, various exemplary components, blocks, modules, circuits, and steps are generally described according to the functions of these hardware, firmware, and software. Whether this function is implemented as hardware, firmware, or software can depend on the specific application and the design constraints imposed on the entire system. People familiar with the concept described herein can implement this function in an appropriate manner for each specific application, but such implementation decisions should not be interpreted as limiting the scope of the present disclosure.

[0067] According to some embodiments, the UE transceiver 230 may be referred to herein as an "uplink" transceiver 230 including a radio frequency (RF) transmitter and an RF receiver, each of which includes circuitry coupled to an antenna 232. A duplex switch (not shown) may alternatively couple the uplink transmitter or receiver to the uplink antenna in a time division duplex manner. Similarly, according to some embodiments, the BS transceiver 210 may be referred to herein as a "downlink" transceiver 210 including an RF transmitter and an RF receiver, each of which includes circuitry coupled to an antenna 212. The downlink duplex switch may alternatively couple the downlink transmitter or receiver to the downlink antenna 212 in a time division duplex manner. The operation of the two transceiver modules 210 and 230 may be coordinated in time so that the uplink receiver circuit is coupled to the uplink antenna 232 so that transmissions on the wireless transmission link 250 can be received while the downlink transmitter is coupled to the downlink antenna 212. Conversely, the operation of the two transceivers 210 and 230 may be coordinated in time such that the downlink receiver coupled to the downlink antenna 212 receives transmissions on the wireless transmission link 250 at the same time as the uplink transmitter coupled to the uplink antenna 232. In some embodiments, there is tight time synchronization with a minimum guard time between changes in the duplex direction.

[0068] The UE transceiver 230 and the base station transceiver 210 are configured to communicate via a wireless data communication link 250 and cooperate with an appropriately configured RF antenna arrangement 212 / 232 that can support a specific wireless communication protocol and modulation scheme. In some exemplary embodiments, the UE transceiver 230 and the base station transceiver 210 are configured to support industry standards (such as Long Term Evolution (LTE) and emerging 5G standards). However, it should be understood that the present disclosure is not necessarily limited to application to specific standards and related protocols. Instead, the UE transceiver 230 and the base station transceiver 210 can be configured to support alternative or additional wireless data communication protocols (including future standards or variations thereof).

[0069] According to various embodiments, BS202 may be, for example, an evolved Node B (eNB), a serving eNB, a target eNB, a femtocell or a microcell. In some embodiments, UE 204 may be implemented in various types of user equipment, such as mobile phones, smart phones, personal digital assistants (PDAs), tablet computers, laptop computers, wearable computing devices, etc. Processor modules 214 and 236 may be implemented or realized using a general-purpose processor, a content addressable memory, a digital signal processor, an application specific integrated circuit, a field programmable gate array, any suitable programmable logic device, a discrete gate or transistor logic, a discrete hardware component, or any combination thereof designed to perform the functions described herein. In this way, the processor may be implemented as a microprocessor, a controller, a microcontroller, a state machine, etc. The processor may also be implemented as a combination of computing devices, such as a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in combination with a digital signal processor core, or any other such configuration combination.

[0070] Further, the steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be implemented directly in hardware, in firmware, in software modules executed by the processor modules 214 and 236, respectively, or in any practical combination thereof. The memory modules 216 and 234 may be implemented as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. In this regard, the memory modules 216 and 234 may be coupled to the processor modules 214 and 236, respectively, so that the processor modules 214 and 236 can read information from and write information to the memory modules 216 and 234, respectively. The memory modules 216 and 234 may also be integrated into their respective processor modules 214 and 236. In some embodiments, the memory modules 216 and 234 may each include a cache memory for storing temporary variables or other intermediate information during the execution of instructions executed by the processor modules 214 and 236, respectively. The memory modules 216 and 234 may also each include non-volatile memory for storing instructions executed by the processor modules 214 and 236, respectively.

[0071] The network communication module 218 generally represents other components of the base station 202 that implement the base station transceiver 210 and hardware, software, firmware, processing logic and / or other network components and communication nodes configured to communicate with the base station 202. For example, the network communication module 218 can be configured to support Internet or WiMAX services. In a typical deployment, but without limitation, the network communication module 218 provides an 802.3 Ethernet interface so that the base station transceiver 210 can communicate with a traditional Ethernet-based computer network. In this way, the network communication module 218 may include a physical interface for connecting to a computer network (e.g., a Mobile Switching Center (MSC)). The terms "configured for", "configured to" and various variations thereof used herein with respect to a specified operation or function refer to a device, component, circuit, structure, machine, signal, etc., which is physically constructed, programmed, formatted and / or arranged to perform a specified operation or function.

[0072] The Open System Interconnection (OSI) model (referred to herein as the "OSI model") is a conceptual and logical layout that defines network communications used by systems (e.g., wireless communication devices, wireless communication nodes) that are interconnected and communicate with other systems. The model is divided into seven subcomponents or layers, each of which represents a conceptual set of services provided to its upper and lower layers. The OSI model also defines a logical network and effectively describes computer packet transmission by using different layer protocols. The OSI model may also be referred to as a seven-layer OSI model or a seven-layer model. In some embodiments, the first layer may be a physical layer. In some embodiments, the second layer may be a media access control (MAC) layer. In some embodiments, the third layer may be a radio link control (RLC) layer. In some embodiments, the fourth layer may be a packet data fusion protocol (PDCP) layer. In some embodiments, the fifth layer may be a radio resource control (RRC) layer. In some embodiments, the sixth layer may be a non-access stratum (NAS) or an Internet Protocol (IP) layer, and the seventh layer is another layer.

[0073] 2. System and method for control channel monitoring

[0074] In the existing Long Term Evolution (LTE) and 5G New Air Interface (NR) access technology communication systems, the wireless communication device 104 or 204 (also referred to as UE) needs to know the uplink scheduling grant information for sending the physical uplink shared channel (PUSCH) and the downlink scheduling allocation information for receiving the physical downlink shared channel (PDSCH). The information is included in the downlink control information (DCI) and is sent to the wireless communication device 104 or 204 on the physical downlink control channel (PDCCH) by the wireless communication node 102 or 202 in different DCI formats. Therefore, the wireless communication device 104 or 204 should first monitor the PDCCH.

[0075] The operation of the wireless communication device 104 or 204 to monitor the PDCCH can be performed on the PDCCH monitoring opportunity and control resource set for the search space set. The relevant monitoring parameters of the PDCCH can be included in the SearchSpace information element (IE), and the SearchSpac IE is included in the radio resource control (RRC) signaling, wherein the search space Id (searchSpaceId) and the control resource set Id (controlResourceSetId) included in the SearchSpace IE respectively indicate the search space set index and the index of the CORESET applicable to the SearchSpace. The search space type (searchSpaceType) included in the SearchSpace IE indicates the search space type of the PDCCH to be monitored by the wireless communication device 104 or 204, wherein the search space type includes a common search space corresponding to different DCI formats and a UE-specific search space. DCI formats 0-0 and 1-0, DCI formats 2-0, DCI formats 2-1, DCI formats 2-2, and DCI formats 2-3 are 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 are included in the UE-specific search space. For wireless communication devices 104 or 204 supporting release 16, DCI formats 2-4 / 2-5 / 2-6 are also included in the common search space, and DCI formats 2-0 and 2-5 are also included in the IAB-MT (Integrated Access and Backhaul Mobile Terminal) specific search space (IAB-MT specific search space, MSS).

[0076] Each DCI format has a corresponding purpose. For example, the purpose of DCI format 0-0 / 0-1 / 0-2 completely includes the scheduling of PUSCH in one cell, and the purpose of DCI format 1-0 / 1-1 / 1-2 completely includes the scheduling of PDSCH in one cell. A radio network temporary identifier (RNTI) is used to scramble the CRC of the DCI. Information of different functions in the DCI is identified as different fields. The fields defined in the DCI format are mapped to information bits a 0 to a A-1Each field is mapped in the order in which it appears in the description, including zero-padding bits (if any), with the first field being mapped to the least significant information bit and each subsequent field being mapped to a higher information bit. The most significant bit of each field is mapped to the least significant information bit for that field, e.g., the most significant bit of the first field is mapped to a 0 .

[0077] The duration included in the SearchSpace IE is a duration T indicating the number of time slots that the wireless communication device 104 or 204 monitors the PDCCH for the search space set s. s (<k s The parameters monitoringSlotPeriodicityAndOffset included in the SearchSpace IE indicate k s The PDCCH monitoring period of each time slot is s The PDCCH monitoring offset of the time slot. The parameters included in the SearchSpace IE include monitoring symbols within the time slot (monitoringSymbolsWithinSlot) N symb Indicates the first symbol(s) used for PDCCH monitoring within a time slot used for PDCCH monitoring.

[0078] For the bitmap indication of the parameter monitoringSymbolsWithinSlot, the most significant (left) bit represents the first Orthogonal Frequency-Division Multiplexing (OFDM) symbol in the time slot, and the second most significant (left) bit represents the second OFDM symbol in the time slot, and so on. The bit(s) set to 1 identify the first OFDM symbol(s) of the control resource set within the time slot.

[0079] If monitoringSymbolsWithinSlot indicates to the wireless communication device 104 or 204 that PDCCH is monitored in a subset of up to three consecutive symbols (which are the same in each time slot in which the wireless communication device 104 or 204 monitors PDCCH for all search space sets), if the subset includes at least one symbol after the third symbol, then the wireless communication device 104 or 204 does not expect to be configured with a PDCCH subcarrier spacing (SCS) other than 15kHz. The wireless communication device 104 or 204 does not expect to be provided with a first symbol and multiple consecutive symbols for a control resource set (CORESET), resulting in PDCCH candidates being mapped to symbols of different time slots. The wireless communication device 104 or 204 does not expect any two PDCCH monitoring occasions (MO) on an activated DL BWP for the same search space set or for different search space sets in the same CORESET to be separated by non-zero symbols less than the CORESET duration.

[0080] (One or more) specific PDCCH monitoring opportunities can be obtained as follows. For the search space set s, if The wireless communication device 104 or 204 may determine that (one or more) PDCCH monitoring opportunities exist at the time numbered n. f The frame number is The wireless communication device 104 or 204 can select the time slot from Start targeting T s The search space set s monitors the PDCCH for the next k consecutive time slots, and s -T s The search space set s may not monitor the PDCCH for consecutive time slots.

[0081] When the DRX cycle is configured, the activation time for the serving cell in the DRX group includes the following times:

[0082] - the drx-onDurationTimer or drx-InactivityTimer configured for the DRX group is running; or

[0083] - drx-RetransmissionTimerDL or drx-RetransmissionTimerUL is running on any serving cell in the DRX group; or

[0084] - the random access-contention resolution timer (ra-ContentionResolutionTimer) or the msgB-response window (msgB-ResponseWindow) is running; or

[0085] - A scheduling request is sent on the PUCCH and awaits processing; or

[0086] - After successfully receiving a random access response to a random access preamble that was not selected by the MAC entity among the contention-based random access preambles, no PDCCH indicating a new transmission of the C-RNTI addressed to the MAC entity has been received.

[0087] The serving cells may be configured as two groups according to RRC. When RRC does not configure a secondary DRX group, there is only one DRX group. When two DRX groups are configured, each serving cell group, referred to as a DRX group, may be configured by RRC with its own set of parameters drx-onDurationTimer and drx-InactivityTimer. When two DRX groups are configured, the two groups share the parameter values ​​drx-SlotOffset, drx-RetransmissionTimerDL, drx-RetransmissionTimerUL, drx-LongCycleStartOffset, drx-ShortCycle (optional), drx-ShortCycleTimer (optional), drx-HARQ-RTT-TimerDL, and / or drx-HARQ-RTT-TimerUL.

[0088] The MAC entity may be configured with a DRX function through RRC, which controls the activation of PDCCH monitoring for UEs for C-RNTI, CI-RNTI, CS-RNTI, INT-RNTI, SFI-RNTI, SP-CSI-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI and TPC-SRS-RNTI of the MAC entity. When using DRX operation, the MAC entity shall also monitor PDCCH as required. When in RRC_CONNECTED, if DRX is configured, the MAC entity may monitor PDCCH discontinuously using DRX operation for all activated serving cells; otherwise, the MAC entity shall monitor PDCCH.

[0089] For Type3-PDCCH CSS (Type-3 CSS) and UE-specific SS,

[0090] - Type3-PDCCH CSS set configured by SearchSpace in PDCCH-Config with searchSpaceType=Common for DCI format with CRC scrambled by INT-RNTI, SFI-RNTI, TPC-PUSCH-RNTI, TPC-PUCCH-RNTI, TPC-SRS-RNTI or CI-RNTI and, for primary cell only, by C-RNTI, MCS-C-RNTI, CS-RNTI or PS-RNTI, and

[0091] - USS set configured specifically by SearchSpace in PDCCH-Config for DCI format searchSpaceType=UE with CRC, where the CRC is scrambled by C-RNTI, MCS-C-RNTI, SP-CSI-RNTI, CS-RNTI, SL-RNTI, SL-CS-RNTI or SL-L-CS-RNTI.

[0092] Existing energy-saving techniques for 5G NR include (i) wake-up indication, (ii) minimum applicable scheduling offset indication, (iii) indication of sleep-like behavior transition on (one or more) Scells, and (iv) search space set switching indication. The wake-up indication indicated by DCI format 2-6 can indicate to the wireless communication device 104 or 204 to wake up or not wake up in the next long DRX cycle. The physical layer of the wireless communication device 104 or 204 can then send the value to the MAC layer (higher layer) to determine whether to start the drx-onDuration timer in the next long DRX cycle.

[0093] The minimum applicable scheduling offset indication indicated by DCI format 0-1 / 1-1 can be used to determine the minimum applicable K2 for an activated UL BWP, the minimum applicable K0 value for an activated DL BWP, and the minimum applicable value of an aperiodic CSI-RS trigger offset for an activated DL BWP. The minimum K2 parameter represents the minimum applicable value of the Time Domain Resource Assignment (TDRA) table for PUSCH, and the minimum K0 parameter represents the TDRA table for PDSCH and the (one or more) minimum applicable values ​​for the A-CSI RS (Aperiodic Channel State Information Reference Signal) trigger offset. The value of K2 represents the time slot offset between the DCI and the PUSCH it schedules. The value of K0 represents the time slot offset between the DCI and the PDSCH it schedules. The value of (one or more) A-CSI RS trigger offset represents the offset between the time slot of the DCI containing the set of triggering aperiodic NZP CSI-RS resources and the time slot in which the CSI-RS source set is transmitted. The minimum applicable scheduling offset (e.g., K0 min , K2 min or (one or more) A-CSI RS triggering offsets) enables the wireless communication device 104 or 204 to relax the PDCCH decoding processing time to reduce some decoding power consumption.

[0094] The indication of a sleep-like behavior transition on (one or more) Scells indicated by DCI format 2-6 / 0-1 / 1-1 may trigger the wireless communication device 104 or 204 to perform sleep behavior on some Scells. If the wireless communication device 104 or 204 is indicated by a "0" value for an activated SCell in the corresponding group of configured SCells, the wireless communication device 104 or 204 may switch to or remain in the sleep BWP of the SCell. Otherwise, if the wireless communication device 104 or 204 is indicated by a "1" value and the currently activated DLBWP is a sleep DL-BWP, the wireless communication device 104 or 204 may switch to or remain in the non-sleep BWP of the SCell. The sleep BWP and the non-sleep BWP are configured by high-level parameters.

[0095] The search space set switching indication indicated by DCI format 2-0 may indicate a group from two search space sets for PDCCH monitoring scheduled on the serving cell. The wireless communication device 104 or 204 may monitor the PDCCH according to the search space set with the indicated group index.

[0096] In existing communication systems including Long Term Evolution (LTE) and 5G New Radio (NR) access technology communication systems, there are many unique categories of use cases, such as enhanced Mobile BroadBand (eMBB), massive Machine Type Communication (mMTC), and Ultra-Reliable and Low-Latency Communication (URLLC). These use cases may be associated with corresponding requirements such as higher data rates, higher reliability, lower latency, and / or very low device energy to support longer battery life. Although these requirements are artificial, they can be used for current or further mobile communications, such as wearable devices, Extended Reality (XR) applications (including cloud gaming and Augmented Reality (AR) / Virtual Reality (VR) applications), etc. Technologies to achieve very low device energy requirements and save UE power consumption may include discontinuous reception (DRX), PDCCH carrying downlink control information (DCI) with wake-up or no wake-up indication (e.g., a wake-up signal represented as WUS), secondary cell (SCell) sleep behavior, and cross-slot scheduling (e.g., a minimum applicable scheduling offset indication for the minimum applicable value of the minimum applicable K0, the minimum applicable K2, and the non-periodic CSI-RS trigger offset). However, from the analysis below, it can be seen that the power consumption in the physical downlink control channel (PDCCH-only) state still accounts for the most, where the PDCCH-only state represents the behavior of the UE monitoring the PDCCH that does not carry DCI.

[0097] Typically, the wireless communication device 104 or 204 needs to keep monitoring the PDCCH during the PDCCH monitoring opportunity to avoid missing any uplink (UL) / downlink (DL) transmission information. (One or more) PDCCH monitoring opportunities can be determined by a SearchSpace (SS) information element (IE), which includes parameters such as the period k s , the duration of the cycle T s and the offset O associated with the start position of the cycle s . Reference Figure 3A and Figure 3B , according to some embodiments of the present disclosure, diagrams 300 and 310 illustrating example PDCCH monitoring without and with DRX are shown, respectively. Figure 3AAn example scenario of PDCCH monitoring without DRX is shown. The PDCCH monitoring timing is configured as T s = 1 time slot and k s = 2 time slots. Figure 3B In the example of , the wireless communication device 104 or 204 performs PDCCH monitoring only during the DRX active time (DRX ActiveTime) and responds to setting the wake-up indication to 1. The discontinuous reception (DRX) mechanism and the wake-up indication can be induced to ensure that the wireless communication device 104 or 204 avoids some PDCCH monitoring power consumption during the DRX active time. In this way, Figure 3A The PDCCH monitoring ratio shown in Figure 3B PDCCH monitoring consumes more power as shown in . In addition, it can be avoided with Figure 3B Most of the power consumption is associated with PDCCH monitoring, especially when data arrival is relatively sparse and the DRX inactivity timer is relatively long.

[0098] Reference Figure 4A and Figure 4B According to some embodiments of the present disclosure, diagrams 400 and 410 showing examples of a skip scheme and a search space set (SSS) group switching scheme are shown, respectively. Figure 4A As shown in , the PDCCH skipping scheme can provide a short duration for the wireless communication device 104 or 204 to stop monitoring the PDCCH, and thus can reduce a lot of power consumption in the PDCCH-only state for the wireless communication device 104 or 202. For example, as Figure 4B As shown in , the PDCCH switching scheme can trigger the wireless communication device 104 or 204 to change the PDCCH monitoring behavior to adapt to real-time data scheduling, thereby saving power. For example, if no traffic arrives after a duration, the wireless communication device 104 or 204 can stop monitoring the PDCCH frequently and start monitoring the PDCCH sparsely by changing (one or more) search space sets (SSS). Figure 4B The PDCCH switching scheme shown in is called SSS group (SSSG) switching. When data arrives sparsely, the wireless communication device 104 or 204 may monitor search space set group 0, and when data arrives frequently, the wireless communication device 104 or 204 may monitor search space set group 1.

[0099] These two schemes can be applied to different situations. For example, if the wireless communication device 104 or 204 should not schedule data for a short duration or a long duration, the PDCCH skipping scheme can reduce power more than the power reduced by the SSS group switching scheme, because the wireless communication device 104 or 204 does not monitor (one or more) any PDCCH opportunities during the skipping period. However, if data arrival is frequent or periodic for the wireless communication device 104 or 204, it is appropriate to provide the wireless communication device 104 or 204 with a suitable PDCCH period k. s and the appropriate duration T s A set of (one or more) search spaces.

[0100] In the present disclosure, various alternatives may be considered for DCI-based PDCCH monitoring adaptation for activated BWPs during activation time to achieve energy saving. Figure 5A-5C According to some embodiments of the present disclosure, diagrams 500, 510, and 520 are shown depicting various DCI-based PDCCH monitoring adaptation methods for activating BWP in activation time. Figure 5A , diagram 500 shows a first PDCCH monitoring method that supports PDCCH monitoring adaptation including skipping within a duration via SSSG switching. Specifically, the first method includes an enhancement of Rel-16 SSSG switching to support PDCCH monitoring adaptation including skipping within a duration. PDCCH skipping can be achieved by monitoring SSSG, which is configured by higher layer parameters. The PDCCH monitoring adaptation mode can only include SSSG switching.

[0101] Reference Figure 5B , diagram 510 represents a second PDDCH monitoring method that supports both skipping PDCCH monitoring and SSSG switching within a duration. Specifically, the second method includes enhancement of (one or more) DCIs for Rel-16 energy saving adaptation to support both skipping PDCCH monitoring and SSSG switching within a duration. According to this method, PDCCH skipping is not achieved by monitoring SSSG, but is configured by higher layer parameters including at least one skip duration value.

[0102] Reference Figure 5C, diagram 520 represents a third PDDCH monitoring method as a combination of the first method and the second method. Specifically, the method can be regarded as an enhancement of (one or more) DCIs for Rel-16 energy saving adaptation to support skipping PDCCH monitoring within a duration and SSSG switching including SSSG for PDCCH skipping. Two types of PDCCH skipping are supported. PDCCH skipping 1 is implemented by monitoring SSSG, and PDCCH skipping 2 does not involve monitoring SSSG and is configured by higher layer parameters including at least one skip duration value.

[0103] Reference Figure 6 , a flow chart of a method 600 for control channel monitoring is shown. The method 600 may include the wireless communication device 104 and 204 reporting and the wireless communication node 102 and 202 receiving multiple capabilities of the wireless communication device 104 and 204 (step 602). The method 600 may include the wireless communication node 102 or 202 sending and the wireless communication device 104 or 204 receiving control information (step 604). The method 600 may include the wireless communication device 104 or 204 performing PDCCH monitoring using a set (one or more) of search space sets (SSSs) selected from a plurality of SSSGs or performing PDCCH skipping using a skip duration selected from a list of candidate skip duration values ​​according to the control information (step 606). The number of SSSGs may be N, where N is an integer greater than or equal to 0. Each SSSG may include a number of SSSs that is at least zero and at most equal to the maximum number of SSSs configured in a bandwidth part (BWP). The number of skip duration values ​​may be M, where M is an integer greater than 0.

[0104] As discussed in further detail below, method 600 may be applied according to various embodiments. These embodiments may be applied to new radio (NR) including AR / VR, XR, and / or eMBB / mMTC / URLLC scenarios, and / or NR unlicensed spectrum (NR-U).

[0105] The PDCCH monitoring adaptive configuration including SSSG and PDCCH skipping described herein may be used for a corresponding Type 3-PDCCH CSS set or USS set for PDCCH monitoring on a serving cell. In the following, the number of (one or more) monitoring opportunities (MO) within a time slot for PDCCH monitoring is denoted as N MOThe time slot (N) may be determined using the configured monitoringSymbolsWithinSlot, the CORESET duration, and one or more search space sets associated with the CORESET (eg, by the wireless communication device 104 or 204). symb ) within the available PDCCH monitoring opportunities.

[0106] In the following, the number of monitoring time slots or symbols during a long period determined by the search space set in the SSSG is denoted as N MS For all search space sets in the BWP, the longest PDCCH monitoring period k is equal to s The same period of time, with a larger N MS The search space set group of indicates that the search space set group has a more intensive PDCCH monitoring behavior.

[0107] Embodiment 1: SSSG and PDCCH skipping

[0108] In some embodiments, the wireless communication device 104 or 204 may perform PDCCH monitoring according to a search space set group (SSSG) based on a plurality of trigger events or a plurality of control information sent (in step 604) by the wireless communication node 102 or 202 (step 606). The number of search space set groups (N) may be not less than 2, and the number of (one or more) search space sets included in the SSSG may be not less than 0 and not greater than the maximum number of search space sets configured in the bandwidth part (BWP).

[0109] In some embodiments, the wireless communication device 104 or 204 may perform PDCCH skipping according to a triggered skip duration value determined based on a plurality of triggering events associated with a plurality of control information sent by the wireless communication node 102 or 202 (in step 604) (step 606). The wireless communication device 104 or 204 may determine the skip duration value among M PDCCH skip duration values. The integer M may not be less than 1, and the PDCCH skip duration value may be in a list of candidate skip duration values. The list of candidate skip duration values ​​may be configured by a higher layer parameter. In some embodiments, the unit of the skip duration value may be a time slot or a millisecond.

[0110] Energy-saving search space grouping

[0111] In some embodiments, the search space set group(s) configured in the BWP by the wireless communication node 102 or 202 may include at least one power saving (PS) SSSG. A PS SSSG may not be configured with a search space set by a higher layer parameter, or the number of search space sets in a PS SSSG may be 0.

[0112] Method 1: Definition of SSSG

[0113] In some embodiments, the network or wireless communication node 102 or 202 may configure up to N search space groups for each BWP. The group IDs may be ordered as 0, 1, ..., N-1. For a PS SSSG with group ID x, there may be no search space set associated with group ID x. For a list of search space group IDs other than group ID x, at least one search space may be associated with the search space group ID.

[0114] Method 2: Definition of SSSG

[0115] In some embodiments, the (one or more) search space set groups configured by the wireless communication node 102 or 202 in the BWP may include at least one power saving (PS) SSSG. At least one of the PDCCH monitoring parameters of any search space set in the (one or more) search space sets included in the PS SSSG may have a restriction condition. The restriction condition may include at least one of the following items: (i) the bitmap of the monitoring symbol in the time slot is all 0, (ii) the duration T s is 0 time slot, (iii) PDCCH monitoring period k s NULL, (iv) PDCCH monitoring period k s Invalid, (v) PDCCH monitoring offset 0 s Equal to (k s -1) time slots, and / or (vi) (one or more) PDCCH monitoring occasions are equal to 0. The PS SSSG may be associated with a power save (PS) timer. During the period when the PS timer is decremented or running in each time slot, the wireless communication device 104 or 204 may not monitor the PDCCH in the Type-3 CSS set and USS set.

[0116] Normal search space set

[0117] The search space set group (one or more) configured in the BWP by the wireless communication node 102 or 202 may include at least one normal SSSG. A normal SSSG may include at least one search space set. At least one search space set of a normal SSSG may belong to a type-3 common search space type and / or a UE-specific search space type.

[0118] Regular search space group

[0119] The search space set group (one or more) configured in the BWP by the wireless communication node 102 or 202 may include a regular SSSG, which includes all search space sets configured in the DL BWP in a cell or across a group of cells for SSSG switching or PDCCH skip bundling. The regular SSSG may not need to be configured by (one or more) higher layer parameters. The regular SSSG may not have a group ID.

[0120] The switching timer may be associated with a normal SSSG or a regular SSSG. In some embodiments, when the wireless communication device 102 or 202 starts monitoring the PDCCH according to the normal SSSG or according to the regular SSSG (e.g., all search space sets configured in the activated DL BWP in the cell or across a set of cells for SSSG switching or PDCCH skip bundling), the switching timer may be set to a value configured by a higher layer parameter. In some embodiments, when the wireless communication device 102 or 202 is monitoring the PDCCH according to the normal SSSG or the regular SSSG and detects any PDCCH, or a PDCCH with a scheduling DCI, or a PDCCH with an SSSG switching indication, the switching timer may be set to a value configured by a higher layer parameter or may be predetermined.

[0121] Search space group classification

[0122] In some embodiments, the search space set groups may be classified based on at least one of a plurality of parameters. The plurality of parameters may include: (i) RNTI type, including at least one of C-RNTI, CI-RNTI, CS-RNTI, INT-RNTI, SFI-RNTI, SP-CSI-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI, TPC-SRS-RNTI, and AI-RNTI, (ii) search space set ID, including at least one of 1, 2, 3, ..., and 39, (iii) search space type, including at least Type-3 CSS type and USS type, (iv) CORESET ID associated with the group of (one or more) search space sets, including at least one of 0, 1, 2, 3, 4, and 5, (v) density of PDCCH monitoring opportunities during the duration, including zero monitoring per time slot, every k monitoring slot, and (v) the number of PDCCH monitoring opportunities during the duration, including zero monitoring per time slot, every k monitoring slot, and every k monitoring slot. s Each time slot monitors a time slot and each k s time slots monitor two time slots, ..., every k s Time slot monitoring (k s -1) time slots and each time slot monitors at least one of the time slots, and / or (vi) a duration T of at least one search space set in the search space set in the SSSG s Or PDCCH monitoring period ks Or offset O s The value of the threshold.

[0123] For example, N=2 SSSGs with group IDs 0 and 1 may be provided to the wireless communication device 104 or 204. At least one of the search space sets of SSSG 0 may have a different search space type compared to the search space set of SSSG 1. For example, SSSG0 may include 4 Type-3 CSS sets and 2 USS sets, and SSSG 1 may include 2 USS sets. In another example, N=3 SSSGs with group IDs 0, 1, and 2 may be provided to the wireless communication device 104 or 204. The three SSSGs may have different PDCCH monitoring densities. For example, SSSG 0 may include 1 search space set, SSSG 1 may include all Type-3 CSS sets and USS sets configured in an activated DL BWP, and SSSG 2 may include a zero search space set. According to yet another example, N=2 SSSGs with group IDs 0 and 1 may be provided to the wireless communication device 104 or 204. At least one of the search space sets of SSSG 0 may have an associated CORESET different from the search space set of SSSG 1. For example, all search space sets of SSSG 0 may be associated with CORESET 0, and all search space sets of SSSG1 may be associated with CORESET 1. For example, for PS SSSG, the T s The value of is equal to 0. For example, for dense SSSG, for each search space set k s and T s The value of is neither greater than 1 nor greater than 0.

[0124] Configuration structure for SSSG and PDCCH skipping

[0125] SSSG switching or PDCCH skipping may be triggered using an indication of DCI (or within DCI). The bit width of the indication field of DCI is W, where W is an integer and is not less than 1. In some embodiments, the value of W may be determined (e.g., by the wireless communication device 104 or 204) based on a function related to SSSG switching or PDCCH skipping or according to the value of N or M provided by a higher layer parameter. The triggering method may include at least one of the following:

[0126] 1. At least one bit of the bit field is used to indicate at least one of the following:

[0127] i. Enable or disable PDCCH monitoring according to SSSG or SSSG switching;

[0128] ii. Enable or disable PDCCH monitoring according to the SSSG with configuration restrictions;

[0129] iii. Enable or disable PDCCH skipping based on skip duration;

[0130] iv. Enable or disable monitoring PDCCH according to all search space sets configured in activated DLBWP in a cell or across a group of cells for SSSG handover or PDCCH skip bundling.

[0131] 2. The leading bit or the most significant bit (MSB) of the field for SSSG switching or PDCCH skip indication may be used to indicate at least one of the following:

[0132] i. Enable or disable PDCCH monitoring according to SSSG or SSSG switching;

[0133] ii. Enable or disable PDCCH monitoring according to the SSSG with configuration restrictions;

[0134] iii. Enable or disable PDCCH skipping based on skip duration;

[0135] iv. Enable or disable monitoring PDCCH according to all search space sets configured in activated DLBWP in a cell or across a group of cells for SSSG handover or PDCCH skip bundling.

[0136] 3. At least one bit of the bit field for SSSG switching or PDCCH skip indication or the remaining bit(s) or non-MSB of the field may be used to indicate at least one of the following:

[0137] i. The UE should switch to monitor the SSSG ID of PDCCH;

[0138] ii. The SSSG ID determined based on the currently monitored SSSG and the value indicated by the bit field of the PDCCH that the UE should switch to monitor;

[0139] iii. Skip duration value;

[0140] iv. All search space sets configured in an activated DLBWP in a cell or across a group of cells for SSSG handover or PDCCH skip bundling;

[0141] v. Configure a restricted SSSG.

[0142] 4. For a PS SSSG, the wireless communication device 104 or 204 should switch to a default SSSG after the PS SSSG expires, where “PS SSSG expiration” means at least one of the following:

[0143] i. The PS timer is decremented to 0 per time slot, per symbol or per millisecond, or the PS timer expires;

[0144] ii. Determine the end of the duration of the validity time of the PS SSSG.

[0145] iii. The wireless communication device 104 or 204 satisfies multiple trigger events related to data processing. The multiple trigger events related to data processing may include at least one of the following: (a) PDCCH decoding, (b) starting to run DRX-RetransmissionTimer DL / UL, (c) SR transmission on PUCCH in waiting state, (d) RAR reception or PDCCH decoding using CRC scrambled by RA-RNTI for a random access preamble that is not selected by the MAC entity in a contention-based random access preamble.

[0146] 5. For PDCCH skipping, the wireless communication device 104 or 204 should switch to the default SSSG after the skip duration ends.

[0147] In some embodiments, SSSG switching or PDCCH skipping may be triggered without DCI indication. For example, (i) after the switching timer expires, the wireless communication device 104 or 204 may switch from a normal SSSG or a regular SSSG to a PSSSSG or PDCCH skipping, (ii) after the switching timer expires, the wireless communication device 104 or 204 may switch from a regular SSSG to a normal SSSG, (iii) after the switching timer expires, the wireless communication device 104 or 204 may switch from a denser SSSG to a sparser SSSG, wherein the denser SSSG may include more search space sets, more RNTI types, more PDCCH monitoring opportunities, or a larger T compared to the sparser normal SSSG. s k s value, (iv) when the wireless communication device 104 or 204 meets multiple trigger events related to data processing, the wireless communication device 104 or 204 can skip switching from the PSSSSG or PDCCH to the default SSSG, or (v) the default SSSG can be configured according to RRC parameters, or predefined in (one or more) normal SSSGs or regular SSSGs.

[0148] Two SSSGs (N=2) including a SSSG for implementing PDCCH skipping

[0149] In some embodiments, in the DL BWP, the number of search space set groups supported by the wireless communication device 104 or 204 may be 2. The two search space set groups may include one normal SSSG and one PS SSSG. The normal SSSG may include at least one search space set having a type-3 common search space type and / or a UE-specific search space type. Hereinafter, the PDCCH monitoring behavior according to all search space sets configured in the activated DL BWP is represented as a conventional PDCCH monitoring behavior. In addition, "all search space sets" refers to all Type-3 CSS sets and USS sets configured in the DL BWP on the serving cell. The DL BWP may be the current activated BWP or a switched BWP indicated by the DCI or triggered by the BWP inactivity timer.

[0150] 2-bit field DCI indicates and implicitly triggers events

[0151] In some embodiments, when the DCI indicates to the wireless communication device 104 or 204 that SSSG switching may be disabled or monitoring of PDCCH may be stopped according to SSSG, the wireless communication device 104 or 204 may perform PDCCH monitoring according to all search space sets configured in the DL BWP. The bit width of the SSSG switching indication may be 2, and the leading bit or MSB may be used to disable or enable SSSG switching, or may be used to disable or enable PDCCH monitoring according to all search space sets configured in the DL BWP.

[0152] After receiving the DCI indication, if the leading bit of the SSSG switch indication is set to "0", the wireless communication device 104 or 204 will stop monitoring the PDCCH according to the SSSG and will start monitoring the PDCCH according to all search space sets configured in the DL BWP. After receiving the DCI indication, if the leading bit of the SSSG switch indication is set to "1", the wireless communication device 104 or 204 will stop the current PDCCH monitoring behavior and will start monitoring the PDCCH according to the SSSG based on the (one or more) remaining bits immediately after or adjacent to the leading bit indication. If the (one or more) remaining bits are set to "0", the wireless communication device 104 or 204 will monitor the SSSG identified as 0, and / or if the (one or more) remaining bits are set to "1", the wireless communication device 104 and 204 will monitor the SSSG identified as 1.

[0153] When the leading bit of the SSSG switching indication is set to "0", the (one or more) remaining bits immediately following the leading bit or adjacent to the leading bit may indicate whether the wireless communication device 104 or 204 should start monitoring the PDCCH according to all search space sets for a group of serving cells. When the leading bit of the SSSG switching indication is set to "1", the (one or more) remaining bits immediately following the leading bit or adjacent to the leading bit are used to indicate the SSSG, and the wireless communication device 104 or 204 should start monitoring the PDCCH according to the indicated SSSG.

[0154] After the PS SSSG expires, the wireless communication device 104 or 204 may perform PDCCH monitoring according to all search space sets configured in the DL BWP. If the RRC signaling configures the wireless communication device 104 or 204 to monitor PDCCH according to the normal SSSG after the PS SSSG expires, the wireless communication device 104 or 204 may perform PDCCH monitoring according to the normal SSSG after the PS SSSR expires. Both SSSGs can be used to reduce PDCCH monitoring, so PDCCH monitoring according to all search space sets can be used for SSSG switching for intensive data arrival services.

[0155] Reference Figure 7 According to some embodiments of the present disclosure, a state diagram 700 is shown showing a first example of switching between two SSSGs without using a DCI indication. A first timer and a second timer may be used (e.g., by a wireless communication device 104 or 204) for SSSG switching. The first timer may not be greater than the second timer. Figure 7 The associated trigger events include:

[0156] 1) If the PDCCH is detected during the first timer and the "normal" SSSG is the current SSSG, the wireless communication device 104 or 204 may switch to all SSSs and stop the first timer.

[0157] 2) If the first timer expires and all SSSs are currently monitored SSSGs, the wireless communication device 104 or 204 may switch to monitoring a "normal" SSSG and reset the first timer.

[0158] 3) If the second timer expires and the "normal" SSSG is the currently monitored SSSG, the wireless communication device 104 or 204 may switch to the PS SSSG.

[0159] 4) The PS timer may be used as the skip duration.After the PS timer expires, the wireless communication device 104 or 204 may switch to a "normal" SSSG.

[0160] 5) According to the "normal" SSSG self-cycle switch, if the first timer expires and the "normal"

[0161] SSSG is the current SSSG, the wireless communication device 104 or 204 may keep monitoring the “normal” SSSG.

[0162] 6) According to the "all SSS" self-loop, if the PDCCH is detected before the first timer expires, the wireless communication device 104 or 204 may keep monitoring "all SSS".

[0163] Reference Figure 8 According to some embodiments of the present disclosure, a state diagram 800 showing a second example of switching between two SSSGs without DCI indication is shown. Search space switching between all search space sets and normal SSSGs can be triggered by DCI. Figure 8 The associated trigger events include:

[0164] 1) If the PDCCH is detected during the decrementing handover timer and the "normal" SSSG is the current SSSG, the wireless communication device 104 or 204 may keep monitoring the "normal" SSSG and reset the handover timer.

[0165] 2) If the handover timer expires and the “normal” SSSG is the current SSSG, the wireless communication device 104 or 204

[0166] Can switch to PS SSSG and start PS timer.

[0167] 3) If the PS timer expires, the wireless communication device 104 or 204 may switch to a "normal" SSSG.

[0168] In some embodiments, the candidate values ​​of the PS timer may be a subset of the candidate values ​​of the handover timer. The handover timer may be configured with one of the {1, ..., 20} time slots of a 15kHz SCS, the {1, ..., 40} time slots of a 30kHz SCS, the {1, ..., 80} time slots of a 60kHz SCS, and / or the {1, ..., 160} time slots of a 120kHz SCS.

[0169] Reference Fig. 9 According to some embodiments of the present disclosure, a state diagram 900 is shown showing an example of switching between two SSSGs and all search space sets using DCI indications. After the PS SSSG expires, the wireless communication device 104 or 204 can switch to monitoring the PDCCH according to the "normal" SSSG or all search space sets based on the RRC configuration. Fig. 9 The associated trigger events include:

[0170] 1) If the PDCCH is detected during the switching timer and the "normal" SSSG is the current SSSG, the wireless communication device 104 or 204 may keep monitoring the "normal" SSSG and reset the switching timer.

[0171] 2) If the handover timer expires and the “normal” SSSG is the current SSSG, the wireless communication device 104 or 204

[0172] Can switch to PS SSSG and start PS timer.

[0173] 3) If the PS timer expires, the wireless communication device 104 or 204 may switch to a "normal" SSSG.

[0174] 4) The DCI indicates to the wireless communication device 104 or 204 to switch from all SSSs to the PS SSSG.

[0175] 5) If the PS timer expires, the wireless communication device 104 or 204 may switch to a "normal" SSSG.

[0176] To allow for flexibility, new RRC parameters of the default SSSG may be introduced that are monitored by the wireless communication device 104 or 204 after the PS timer expires.

[0177] 1-bit field DCI indication

[0178] A 1-bit field DCI indication may be used to indicate SSSG switching, because a self-loop indication for each SSSG may not be required in some cases. For example, a 1-bit field SSSG switching indication may only indicate SSSGs or all search space sets other than the current SSSG monitored by the wireless communication device 104 or 204. For all SSSs, if SSSG switching is disabled by DCI or RRC configuration / reconfiguration, the wireless communication device 104 or 204 may perform PDCCH monitoring based on switching a "normal" SSSG and / or PS SSSG to all SSSs. If SSSG switching is enabled by DCI or RRC configuration / reconfiguration, the wireless communication device 104 or 204 may perform PDCCH monitoring based on switching all SSSs to a "normal" SSSG and / or PS SSSG.

[0179] In NR, the wireless communication device 104 or 204 may support a group of cells and jointly perform SSSG handover on these cells. In this case, the RRC parameters for SSSG handover should be configured / designed to support cell-bundled SSSG handover.

[0180] Three SSSGs (N=3) including two normal SSSGs and one PS SSSG

[0181] In an activated DL BWP, the number of search space set groups supported by the wireless communication device 104 or 204 may be 3. The three search space set groups may include two normal SSSGs and one PS SSSG. The normal SSSG may include at least one search space set having a type-3 common search space type and / or a UE-specific search space type. (One or more) normal SSSGs may include an SSSG with sparse PDCCH monitoring behavior and an SSSG with dense PDCCH monitoring behavior. Sparse or dense PDCCH monitoring behavior may be determined based on a PDCCH monitoring parameter value of a search space set in the SSSG.

[0182] PDCCH monitoring period k of any search space set in SSSG with sparse PDCCH monitoring behavior s It can be greater than the monitoring period k of any search space set in the SSSG with intensive PDCCH monitoring behavior s . T of any search space set in SSSG with sparse PDCCH monitoring behavior s It may not be greater than T of any search space set in the SSSG with dense PDCCH monitoring behavior s .

[0183] In some embodiments, a 2-bit field in the DCI may be used to indicate SSSG switching between the three SSSGs and / or all search space sets configured in the DL BWP. In some embodiments, a 1-bit field in the DCI may be used to indicate SSSG switching from the current SSSG to the other two SSSGs. For example, the 1-bit field may not be used to indicate to the wireless communication device 104 or 204 not to change the current PDCCH monitoring behavior or to keep monitoring the PDCCH according to the current SSSG. For example, if the 1-bit field is set to "0", the currently monitored SSSG is SSSG0.

[0184] PS Timer for PS SSSG

[0185] When the wireless communication device 104 or 204 switches to monitor the PDCCH according to the PS SSSG, the wireless communication device 104 or 204 may start the PS timer. After the PS timer expires, the wireless communication device 104 or 204 may switch to another SSSG. The switching timer may not be greater than the PS timer. The unit of the switching timer and / or the PS timer may be a time slot or millisecond.

[0186] The network or wireless communication node 102 or 202 may configure the same PS timer value for all serving cells in the same cell group for switching (CellGroupForSwitch). The PS timer may be configured for a serving cell or for a group of serving cells bound for SSSG switching. If the wireless communication device 104 or 204 starts monitoring the PDCCH according to the PS SSSG, the wireless communication device 104 or 204 may decrement the PS timer value by one after each time slot or symbol or millisecond based on the reference SCS configuration. The reference SCS configuration may be the minimum SCS configuration μ among all configured DLBWPs of the serving cell or set of serving cells. The wireless communication device 104 or 204 may maintain the reference SCS configuration during the PS timer decrement procedure.

[0187] The network or wireless communication node 102 or 202 may configure the same PS timer value for all BWPs in the serving cell. The PS timer may be configured for each serving cell. If the wireless communication device 104 or 204 changes to monitor the PDCCH according to the PS SSSG, the wireless communication device 104 or 204 may decrement the PS timer value by one after each slot or symbol or millisecond based on the reference SCS configuration. The reference SCS configuration may be the minimum SCS configuration μ among all configured DL BWPs in the serving cell. The wireless communication node 102 or 202 may maintain the reference SCS configuration during the PS timer decrement procedure of the serving cell.

[0188] The network or wireless communication node 102 or 202 may configure a PS timer value for each BWP. The PS timer may be configured for each BWP. If the wireless communication device 104 or 204 changes to monitor the PDCCH according to the PS SSSG, the wireless communication device 104 or 204 may decrement the PS timer value by one after each slot or symbol or millisecond based on the SCS configuration of the activated DL BWP in the serving cell. The wireless communication device 104 or 204 may maintain the SCS configuration of the activated DL BWP during the PS timer decrement procedure of the serving cell. If the BWP is switched during the PS timer decrement, the SCS configuration may be changed to the SCS configuration in the activated BWP after the BWP switching after the BWP switching delay.

[0189] In some embodiments, if the wireless communication device 104 or 204 performs a BWP switch to a scheduled BWP switch, and the wireless communication device 104 or 204 is instructed to switch from a SSSG to a PS SSSG, the wireless communication device 104 or 204 should use the PS timer value configured in the scheduled BWP. After the PS SSSG expires, the wireless communication device 104 or 204 may switch to a default SSSG. The default SSSG may be configured through an RRC parameter or predefined among all search space sets configured in the DL BWP and / or (one or more) normal SSSGs.

[0190] Two SSSGs including one normal SSSG and one PS SSSG and PDCCH skipping with at least 1 skip duration value (N=2, M≥1)

[0191] In the activated DL BWP, the number of search space set groups supported by the wireless communication device 104 or 204 may be 2, and the PDCCH skipping behavior may include at least 2 skip duration values. The 2 SSSGs may include a normal SSSG and a PSSSSG. The normal SSSG may include at least one search space set having a type-3 common search space type and / or a UE-specific search space type configured in the activated DL BWP. If PDCCH skipping is performed, the wireless communication device 104 or 204 may stop monitoring the PDCCH according to the search space set having a type-3 common search space type and / or a UE-specific search space type.

[0192] In some embodiments, after the switching timer expires, the wireless communication device 104 or 204 should switch the PDCCH monitoring according to the normal SSSG to the PS SSSG, or the wireless communication device 104 or 204 should switch the PDCCH monitoring according to all search space sets to the normal SSSG. In some embodiments, after detecting the PDCCH, the wireless communication device 104 or 204 should switch the PDCCH monitoring according to the normal SSSG to all search space sets configured in the activated DL BWP, or the wireless communication device 104 or 204 should maintain the PDCCH monitoring according to the normal SSSG or all search space sets configured in the activated DL BWP. In some embodiments, after the PS timer expires, the wireless communication device 104 or 204 should switch from the normal SSSG to the PDCCH skipping behavior.

[0193] 2-bit field DCI indication

[0194] If the wireless communication device 104 or 204 does not support PDCCH skipping, 2 bits may be used for the PDCCH monitoring behavior adaptation indication, wherein the leading bit may be set to "0". Optionally, 1 bit may be used for the PDCCH monitoring behavior adaptation indication, wherein only one bit may be used for the SSSG switching indication. If the wireless communication device 104 or 204 does not support SSSG switching, 2 bits may be used for the PDCCH monitoring behavior adaptation indication, and the leading bit may be set to "1". Optionally, 1 bit may be used for the PDCCH monitoring behavior adaptation indication, and only one bit may be used for the PDCCH skipping indication. If the wireless communication device 104 or 204 supports both PDCCH skipping and SSSG switching, 2 bits may be used for the PDCCH monitoring behavior adaptation indication, and the leading bit may be used to indicate whether (one or more) remaining bits or the second bit are used to indicate SSSG switching.

[0195] In some embodiments, 2 bits may be used for PDCCH monitoring behavior adaptation indication. The leading bit may be used to indicate whether (one or more) remaining bits or the second bit are used to indicate SSSG switching. If the leading bit is set to "0", the (one or more) remaining bits or the second bit are used to indicate the normal SSSG and / or all search space sets are switched to the PS SSSG when set to "1", and the (one or more) remaining bits or the second bit are used to indicate the normal SSSG or all search space sets are switched to the normal SSSG when set to "0". If the leading bit is set to "1", the (one or more) remaining bits or the second bit are used to indicate the first PDCCH skip duration value when set to "0", and the (one or more) remaining bits or the second bit are used to indicate the second PDCCH skip duration value when set to "1".

[0196] Reference Figures 10A-10D According to some embodiments of the present disclosure, state diagrams 1000, 1010, 1020, and 1030 depicting various scenarios of switching in PDCCH monitoring behavior using DCI indication are shown. In these figures, a normal SSSG is represented as SSSG0, and a PS SSSG is represented as SSSG1. All SSSs configured in an activated DL BWP participate in SSSG switching through DCI indication. State diagrams 1000, 1010, 1020, and 1030 illustrate detailed PDCCH monitoring behavior switching based on a 2-bit field indication.

[0197] If the wireless communication device 104 or 204 is provided with only SSSG switching through higher layer parameters, the wireless communication device 104 or 204 may determine the SSSG to switch to based on the currently monitored SSSG and the DCI indication value. Fig. 10A, shows a case of switching to all SSSs after SSSG1 expires, and a DCI indication of "00" is used to indicate SSSG0, and a DCI indication of "01" is used to indicate SSSG1. If the wireless communication device 104 or 204 is monitoring the PDCCH according to SSSG0, the DCI indication of "00" is used to indicate switching to SSSG0, and the DCI indication of "01" is used to indicate switching to SSSG1. If the wireless communication device 104 or 204 is monitoring the PDCCH according to SSSG1, the wireless communication device 104 or 204 should switch to monitoring the PDCCH according to all search space sets in the activated DL BWP after SSSG1 expires (e.g., the skip duration ends). If the wireless communication device 104 or 204 is monitoring the PDCCH according to all SSSs configured in the activated DL BWP, the DCI indication of "00" is used to indicate switching to SSSG0, and the DCI indication of "01" is used to indicate switching to SSSG1.

[0198] Reference Fig. 10B , the case of switching SSSG0 after SSSG1 expires is shown in the figure, and both the DCI indication and the currently monitored SSSG are used to determine the switched SSSG. If the wireless communication device 104 or 204 is monitoring the PDCCH according to SSSG0, the DCI indication "00" is used to indicate switching to all SSSs, and the DCI indication "01" is used to indicate switching to SSSG1. If the wireless communication device 104 or 204 is monitoring the PDCCH according to SSSG1, after SSSG1 expires (for example, the skip duration ends), the wireless communication device 104 or 204 should switch to monitoring the PDCCH according to SSSG0. If the wireless communication device 104 or 204 is monitoring the PDCCH according to all SSSs configured in the activated DL BWP, the DCI indication "00" is used to indicate switching to SSSG0, and the DCI indication "01" is used to indicate switching to SSSG1.

[0199] Now refer to Fig. 10C , state diagram 1020 illustrates a scenario where the wireless communication device 104 or 204 is provided only with PDCCH skipping through higher layer parameters. In this scenario, a DCI indication of "10" may be used to indicate a PDCCH skipping with a first skip duration value, and a DCI indication of "11" may be used to indicate a PDCCH skipping with a second skip duration value. After the PDCCH skipping expires, the wireless communication device 104 or 204 may fall back to monitoring the PDCCH according to all SSS configured in the activated DL BWP.

[0200] Now refer to Fig. 10D, state diagram 1030 shows a scenario of PDCCH monitoring behavior adaptation through DCI indication, wherein the wireless communication device 104 or 204 is provided with both SSSG switching and PDCCH skipping through higher layer parameters. The leading bit of the 2-bit field can be used to enable SSSG switching when set to "0", and the (one or more) remaining bits or the second bit of the 2-bit field can be used to indicate SSSG0 when set to "0" and can be used to indicate SSSG1 when set to "1". The leading bit of the 2-bit field can be used to enable PDCCH skipping when set to "1", and the (one or more) remaining bits or the second bit of the 2-bit field can be used to indicate PDCCH skipping with a first skip duration value when set to "0" and can be used to indicate PDCCH skipping with a second skip duration value when set to "1".

[0201] In some implementations, after the PDCCH skip expires (eg, the skip duration ends), the wireless communication device 104 or 204 may fall back to monitoring the PDCCH according to the default SSSG. The default SSSG selected among SSSG0, SSSG1, and all SSSs may be configured through RRC signaling.

[0202] Two SSSGs including 2 SSSGs and PDCCH skipping with at least 1 skip duration value (N=2, M≥1)

[0203] In some embodiments, in the DL BWP, the number of search space set groups supported by the wireless communication device 104 or 204 may be 2, and the PDCCH skipping behavior may include at least 2 skip duration values. The 2 SSSGs may be normal SSSGs, and the normal SSSG may include at least one search space set having a type-3 common search space type and / or a UE-specific search space type configured in the activated DL BWP. If PDCCH skipping is performed, the wireless communication device 104 or 204 may stop monitoring the PDCCH according to the search space set having a type-3 common search space type and / or a UE-specific search space type. It may be assumed that the two SSSGs have group IDs 0 and 1, respectively.

[0204] Timer-based triggering method

[0205] In some implementations, the implicit PDCCH monitoring adaptive switching triggering event may include at least one of the following:

[0206] 1) Expiration of the switching timer can be used to switch SSSG0 to SSSG0, or switch SSSG0 to SSSG1 and / or switch all SSSs to SSSG0.

[0207] 2) Decoding PDCCH can be used to switch SSSG0 to SSSG0 or switch SSSG0 to all SSSs;

[0208] 3) UL activities (SR (Scheduling Request) / RACH (Random Access Channel)) can be used to switch SSSG0 to all SSSs, or switch SSSG1 to SSSG0 or all SSSs.

[0209] 4) An additional larger timer may be used to switch SSSG0 to PDCCH skipping.

[0210] 2-bit field DCI indication

[0211] In some embodiments, 1 bit of the 2-bit field may be used to enable / disable PDCCH skipping or enable / disable SSSG switching. Another 1 bit of the 2-bit field may be used to indicate SSSG switching or PDCCH skipping. In some embodiments, 2 bits may be used for PDCCH monitoring behavior adaptation indication. The leading bit of the 2-bit field may be used to indicate whether (one or more) remaining bits or the second bit are used to indicate SSSG switching or PDCCH skipping. If the leading bit is set to "0", the (one or more) remaining bits or the second bit may be used to indicate SSSG1 when set to "1", and the (one or more) remaining bits or the second bit may be used to indicate SSSG0 when set to "0". If the leading bit is set to "1", the (one or more) remaining bits or the second bit may be used to indicate the first PDCCH skip duration value when set to "0", and the (one or more) remaining bits or the second bit may be used to indicate the second PDCCH skip duration value when set to "1".

[0212] Reference Figures 11A-11D According to some embodiments of the present disclosure, state diagrams 1100, 1110, 1120, and 1130 are shown that depict other scenarios of switching in PDCCH monitoring behavior using DCI indication. Specifically, there are two SSSGs, which are normal SSSGs and are represented as SSSG0 and SSSG1, and PDCCH skipping is configured with two different skip duration values. Figures 11A-11D FIG. 4 shows various scenarios for switching the PDCCH monitoring behavior indicated by DCI.

[0213] Fig.11AThe state diagram 1100 depicts a scenario where the wireless communication device 104 or 204 is provided only with SSSG switching through higher layer parameters. In this scenario, a DCI indication of "00" is used to indicate SSSG0, and a DCI indication of "01" is used to indicate SSSG1.

[0214] Fig. 11B The state diagram 1110 depicts a scenario where the wireless communication device 104 or 204 is provided only with PDCCH skipping through higher layer parameters. A DCI indication of "10" may be used to indicate a PDCCH skipping with a first skip duration value, and a DCI indication of "11" may be used to indicate a PDCCH skipping with a second skip duration value.

[0215] When the wireless communication device 104 or 204 is provided with both SSSG switching and PDCCH skipping through higher layer parameters, the leading bit of the 2-bit field can be used to enable SSSG switching when set to "0", and the remaining bit (one or more) or second bit of the 2-bit field can be used to indicate SSSG0 when set to "0" and can be used to indicate SSSG1 when set to "1". The leading bit of the 2-bit field can be used to enable PDCCH skipping when set to "1", and the remaining bit (one or more) or second bit of the 2-bit field can be used to indicate PDCCH skipping with a first skip duration value when set to "0" and can be used to indicate PDCCH skipping with a second skip duration value when set to "1". The leading bit can also be interpreted as the most significant bit.

[0216] Fig. 11C and Fig.11D State diagrams 1120 and 1130 respectively depict scenarios for PDCCH skipping with different skip duration values. Fig. 11C and Fig.11D As shown in FIG. 1 , the wireless communication device 104 or 204 can switch or fall back to monitoring the PDCCH according to different SSSGs (for skipping with different skip duration values) or the same default SSSG, respectively.

[0217] Skip duration configuration

[0218] In some embodiments, the PDCCH skip duration value may be configured by RRC signaling, which is selected from any PDCCH monitoring period value among (one or more) PDCCH monitoring period values ​​configured by higher layer parameters.

[0219] When the PDCCH skip duration ends, the wireless communication device 104 or 204 may start PDCCH monitoring according to the default SSSG. The default SSSG may be configured by a higher layer parameter selected from among the SSSG configured for the wireless communication device 104 or 204 and all search spaces configured for the activated DL BWP.

[0220] To achieve the combination of SSSG monitoring and PDCCH skipping, the PDCCH monitoring period k in the SearchSpace IE may be considered (eg, by the wireless communication device 104 or 204). s and offset O s and duration T s The list of candidate skip duration values ​​can be the PDCCH monitoring period k in the SearchSpace IE. s A subset of the values ​​of .

[0221] In some implementations, the list of candidate skip duration values ​​may be a subset of the value of the DRX inactivity timer or the value of the DRX onDuration timer in the DRX-Config IE.

[0222] In order to achieve flexible and diverse PDCCH skip duration configuration, a more accurate PDCCH skip duration value may be defined. In some embodiments, the list of candidate PDCCH skip duration values ​​may be equal to α*2n, where α is an integer not less than 1 and not greater than 5. The parameter n is an integer not less than 0 and not greater than 10. The unit of PDCCH skip duration may be time slot or millisecond.

[0223] In order to make the PDCCH skip duration suitable for various SCS configurations, it is necessary to define the difference between each two adjacent candidate PDCCH skip duration values. In some embodiments, the difference between a pair of adjacent candidate PDCCH skip duration values ​​is not less than 0.125 milliseconds, or 0.25 milliseconds, or 0.5 milliseconds, or 1 millisecond, or 1 time slot, or 1 symbol.

[0224] In some embodiments, the PDCCH skip duration is decremented by 1 after each time slot or symbol or millisecond according to the reference SCS. In some embodiments, if the PDCCH skip duration is bundled for a group of cells, the reference SCS is the minimum reference SCS configuration μ among all BWPs in the cell or a group of cells. In some embodiments, the reference SCS is maintained during the operation of the PDCCH skip duration.

[0225] SSSG Configuration

[0226] In some embodiments, SSSG switching is only used to switch search space sets belonging to type-3 common search space sets and UE-specific search space sets. The "all search space sets configured in the activated DL BWP" mentioned above refers to all search space sets belonging to type-3 common search space sets and / or UE-specific search space sets and configured in the activated DL BWP.

[0227] Application delay

[0228] The application delay of the PDCCH monitoring behavior switch should take into account the processing time for DL ​​semi-persistent scheduling (SPS) release, the processing preparation time for PUSCH, and the worst-case carrier aggregation (CA) to avoid processing data transmission too late. The wireless communication device 104 or 204 may be expected to provide HARQ-ACK information in response to the SPS PDSCH release after X symbols from the last symbol of the PDCCH providing the SPS PDSCH release. If the processing type 2 enabled (processingType2Enabled) of the PDSCH-ServingCellConfig is set to enabled for the serving cell utilizing the PDCCH providing the SPS PDSCH release, then for μ=0, X=5, for μ=1, X=5.5, and for μ=2, X=11, otherwise, for μ=0, X=10, for μ=1, X=12, for μ=2, X=22, and for μ=3, X=25. The PUSCH preparation time for the wireless communication device 104 or 204 can be 10 / 12 / 23 / 36 symbols for μ=15 / 30 / 60 / 120kHz, or 5 / 5.5 / 11 symbols for μ=15 / 30 / 60kHz. The worst case CA is 25 symbols. If the DCI format 1_1 indicating SSSG switching or PDCCH skipping also indicates SCell dormancy, the wireless communication device 104 or 204 is expected to provide HARQ-ACK information in response to the detection of DCI format 1_1 indicating SCell dormancy after N symbols from the last symbol of the PDCCH providing DCI format 1_1. If processingType2Enabled of PDSCH-ServingCellConfig is set to enabled for a serving cell utilizing a PDCCH providing DCI format 1_1, then for μ=0, N=7, for μ=1, N=7.5, and for μ=2, N=15; otherwise, for μ=0, N=14, for μ=1, N=16, for μ=2, N=27, and for μ=3, N=31, where μ is the minimum SCS configuration between the SCS configuration of the PDCCH providing DCI format 1_1 and the SCS configuration of the PUCCH utilizing HARQ-ACK information detected in response to DCI format 1_1.

[0229] Therefore, according to the above situation, by considering these situations, the minimum delay for applying PDCCH skipping or SSSG switching can be determined based on at least one of the following values.

[0230] Considering the time interval of HARQ-ACK information in response to the detection of DCI format 1_1 indicating SCell dormancy, the wireless communication device 104 or 204 should perform PDCCH skipping or SSSG switching after reporting the HARQ-ACK information. In some embodiments, the minimum delay for switching of PDCCH monitoring behavior in SSSG switching or PDCCH skipping can be 7 / 7.5 / 15 symbols for μ=0 / 1 / 2, or 14 / 16 / 27 / 31 symbols for μ=0 / 1 / 2 / 3. In some embodiments, if processingType2Enabled of PDSCH-ServingCellConfig is set to enabled for a serving cell utilizing a PDCCH providing DCI format 1_1, the minimum delay for μ=0 / 1 / 2 can be no less than 7 / 7.5 / 15 symbols, otherwise, for μ=0 / 1 / 2 / 3, the minimum delay is no less than 14 / 16 / 27 / 31 symbols.

[0231] Considering the PUSCH preparation time, 36 symbols may be defined as a threshold for the minimum delay for PDCCH monitoring behavior switching. In some embodiments, the minimum delay for PDCCH monitoring behavior switching for SSSG switching or PDCCH skipping in frequency range 2 (FR2) may be D, where for μ=3, D is not greater than 36 symbols. For example, for μ=3, D may be 24, 25, 27, 31, or 36 symbols.

[0232] Considering the PUSCH preparation time, 36 symbols may be defined as the minimum value of the minimum delay for PDCCH monitoring behavior switching. In some embodiments, the minimum delay for PDCCH monitoring behavior switching for SSSG switching or PDCCH skipping in frequency range 2 (FR2) may be D, where for μ=3, D is not less than 36 symbols. For example, for μ=3, D may be 36 or 40 symbols.

[0233] Considering performing PDCCH monitoring behavior switching in an activated DL BWP, DL SPS processing time and worst case CA are used to determine the minimum delay value of the wireless communication device 104 or 204 processing capability for PDCCH skipping or PDCCH monitoring behavior switching among SSSG.

[0234] In some embodiments, the minimum delay for switching of PDCCH monitoring behavior between SSSG switching or PDCCH skipping for frequency range 2 (FR2) may be D, where, for μ=3, D is no greater than 36 symbols. For example, for μ=3, D may be equal to 24, 25, or 36 symbols. In some embodiments, the application delay for switching of PDCCH monitoring behavior between SSSG monitoring and PDCCH skipping may be provided as follows in Table 1.

[0235]

[0236] Table 1

[0237] In some embodiments, the application delay for switching of PDCCH monitoring behavior between different SSSGs may be provided in Table 2 as follows.

[0238]

[0239] Table 2

[0240] In some embodiments, the minimum delay for switching of PDCCH monitoring behavior in SSSG switching or PDCCH skipping can be at least one of 25 symbols (for μ=0 / 1 / 2 / 3) or 10 / 12 / 22 / 25 symbols (for μ=0 / 1 / 2 / 3).

[0241] Example 2: New transmission / retransmission processing

[0242] Depending on the PS SSSG or PDCCH skipping or sparser SSSG, solutions for the impact of data processing on PDCCH monitoring may include:

[0243] (1) When the wireless communication device 104 or 204 switches to a sparser SSSG or PDCCH skipping, the wireless communication device 104 or 204 does not expect to detect PDCCH scheduling in the initial transmission, or the wireless communication device 104 or 204 should start monitoring PDCCH according to the sparser SSSG or PDCCH skipping after a certain duration.

[0244] i. The specific duration may be configured via radio resource control (RRC) signaling; or

[0245] ii. The specific duration may be determined by the bandwidth part (BWP) switching delay; or

[0246] iii. The specific duration may start after the wireless communication device 104 or 204 receives a DCI indication or a time slot or symbol or valid PDCCH monitoring opportunity when the switching timer expires, and may end after a time slot, symbol or valid PDCCH monitoring opportunity when all DL scheduled data is successfully received.

[0247] iv. The specific duration may start after the wireless communication device 104 or 204 receives a DCI indication or a switching timer expires, or after a time slot, symbol, or valid PDCCH monitoring opportunity, and may end after the time slot, symbol, or valid PDCCH monitoring opportunity in which the most recently scheduled data is fully received using the maximum number of retransmissions.

[0248] v. The specific duration may end after the earliest time slot between the time slot in which the most recently scheduled data was completely received by using the maximum number of retransmissions and the time slot in which all scheduled DL data were successfully received.

[0249] vi. Here, the described "all scheduled data are successfully received" may be interpreted as "all PDSCH HARQ processes are completed or ended in the serving cell or across relevant CCs for SSSG switching or PDCCH skip bundling" or "all PDSCHs and PUSCHs are fully processed in the serving cell or across relevant CCs for SSSG switching or PDCCH skip bundling".

[0250] (2) When DRX is configured and the wireless communication device 104 or 204 monitors the PDCCH according to a sparser SSSG or PDCCH skipping, the wireless communication device 104 or 204 should start monitoring the PDCCH according to the default SSSG during the duration that the DRX-Retransmission Timer DL / UL is running.

[0251] (3) When DRX is configured or the wireless communication device 104 or 204 is monitoring the PDCCH according to a PDCCH skip or a sparser SSSG, the wireless communication device 104 or 204 should stop the skip duration or stop monitoring the PDCCH according to the sparser SSSG, and start monitoring the PDCCH according to the default SSSG after the wireless communication device 104 or 204 sends an SR on the PUCCH and the SR is pending, or after the wireless communication device 104 or 204 successfully receives an RAR for a random access preamble that is not selected by the MAC entity in a contention-based random access preamble.

[0252] (4) When DRX is configured or the wireless communication device 104 or 204 is monitoring the PDCCH according to an SSSG or PDCCH skipping with sparse PDCCH monitoring behavior, the wireless communication device 104 or 204 should stop the skip duration or stop monitoring the PDCCH according to the sparser SSSG, and start monitoring the PDCCH at the first time slot or symbol or at least delay symbols of the valid PDCCH monitoring opportunity according to the default SSSG, and the first time slot or symbol or at least delay symbols of the valid PDCCH monitoring opportunity is after the last symbol of the SR on the PUCCH and the SR is pending processing or after the last symbol of the RAR or PDCCH with CRC scrambled by the RA-RNTI for the random access preamble that is not selected by the MAC entity in the contention-based random access preamble.

[0253] (5) In some embodiments, when the wireless communication device 104 or 204 satisfies at least one of the following events, the wireless communication device 104 or 204 shall stop performing PDCCH skipping or stop monitoring PDCCH according to a sparser SSSG and start monitoring PDCCH according to a default SSSG:

[0254] i. Beam failure detection;

[0255] ii. The wireless communication device 104 or 204 needs to indicate an out-of-sync state to a higher layer;

[0256] iii. The wireless communication device 104 or 204 has no PUCCH resources to send the SR;

[0257] iv. The wireless communication device 104 or 204 uses RACH resources to send SR;

[0258] v. PDCCH monitoring after the wireless communication device 104 or 204 monitors the search space set provided by recoverySearchSpaceId;

[0259] vi. When the wireless communication device 104 or 204 needs to report HARQ-ACK feedback information, the wireless communication device 104 or 204 loses synchronization;

[0260] vii. When the wireless communication device 104 or 204 needs to send a PUSCH, the wireless communication device 104 or 204 loses synchronization.

[0261] (6) Wherein, a sparser SSSG is a set of search space sets with fewer PDCCH monitoring opportunities. Wherein, the default SSSG is configured through an RRC parameter or is predefined in (one or more) normal SSSGs and / or conventional SSSGs.

[0262] Retransmissions for PDCCH monitoring skipped based on SSSG or PDCCH

[0263] In some embodiments, when the wireless communication device 104 or 204 switches PDCCH monitoring according to an SSSG with dense PDCCH monitoring behavior to an SSSG with sparse PDCCH monitoring behavior, the wireless communication device 104 or 204 should start monitoring PDCCH according to the SSSG with sparse PDCCH monitoring behavior after a specific duration. When the wireless communication device 104 or 204 switches PDCCH monitoring to PDCCH skipping, the wireless communication device 104 or 204 should start PDCCH skipping after a specific duration.

[0264] The specific duration may start after the wireless communication device 104 or 204 receives a DCI indication or a time slot or symbol or valid PDCCH monitoring opportunity at which the switching timer expires, and may end after a time slot, symbol, or valid PDCCH monitoring opportunity at which all DL scheduled data is successfully received. The specific duration may start after the wireless communication device 104 or 204 receives a DCI indication or a time slot or symbol or valid PDCCH monitoring opportunity at which the switching timer expires, and may end after a time slot, symbol, or valid PDCCH monitoring opportunity at which the most recently scheduled data is completely received by using the maximum number of retransmissions. The specific duration may end after the earliest time slot between the time slot at which the most recently scheduled data is completely received by using the maximum number of retransmissions and the time slot at which all scheduled DL data is successfully received.

[0265] In some embodiments, when DRX is configured and the wireless communication device 104 or 204 is monitoring PDCCH according to a SSSG with sparse PDCCH monitoring behavior or PDCCH skipping, the wireless communication device 104 or 204 should start monitoring PDCCH according to a SSSG with dense PDCCH monitoring behavior or all search space sets configured in the activated DLBWP during the duration that the DRX-Retransmission Timer DL / UL is running.

[0266] Here, the expression "all DL scheduled data are successfully received" or "all scheduled data are successfully received" may be interpreted as "all PDSCH HARQ processes are completed or ended in the serving cell or across relevant CCs for SSSG switching or PDCCH skip bundling" or "all PDSCHs and configured UL grants are fully processed in the serving cell or across relevant CCs for SSSG switching or PDCCH skip bundling."

[0267] New transmission cases for PDCCH monitoring based on SSSG or PDCCH skipping

[0268] In some implementations, when the wireless communication device 104 or 204 is monitoring the PDCCH according to SSSG or PDCCH skipping with sparse PDCCH monitoring behavior, the wireless communication device 104 or 204 does not expect to detect a PDCCH scheduling an initial transmission.

[0269] UL transmission monitoring for PDCCH skipping based on SSSG or PDCCH

[0270] Reference Fig. 12A and Fig. 12B According to some embodiments of the present disclosure, two diagrams 1200 and 1210 showing two events that trigger DRX activation time are shown. When the DRX cycle is configured, the activation time of the serving cells in the DRX group may include the time of the following situations:

[0271] 1) The drx-onDurationTimer or drx-InactivityTimer configured for the DRX group is running, or

[0272] 2) drx-RetransmissionTimerDL or drx-RetransmissionTimerUL is running on any serving cell in the DRX group, or

[0273] 3) ra-ContentionResolutionTimer or msgB-ResponseWindow is running, or

[0274] 4) If Fig. 12A As shown in , a Scheduling Request (SR) is sent on the PUCCH and awaits processing, or

[0275] 5) If Fig. 12B As shown in , after successfully receiving a random access response to a random access preamble that was not selected by the MAC entity among contention-based random access preambles, a PDCCH indicating a new transmission of a C-RNTI addressed to the MAC entity has not been received.

[0276] According to the above description, for a wireless communication device 104 or 204 that supports SSSG switching and / or PDCCH skipping, it is important to consider whether and how to minimize the impact on data scheduling of new transmissions and retransmissions.

[0277] In some implementations, whether the wireless communication device 104 or 204 should switch to a default SSSG may be configured via a radio resource control (RRC) signaling parameter.

[0278] In some embodiments, if PDCCH skipping is performed by the wireless communication device 104 or 204, after the wireless communication device 104 or 204 sends an SR on the PUCCH and the SR is pending, or after the wireless communication device 104 or 204 successfully receives an RAR for a random access preamble that is not selected by the MAC entity in a contention-based random access preamble, the wireless communication device 104 or 204 should stop the skipping duration and start monitoring the PDCCH according to a denser SSSG or all search space sets configured in the current activated DL BWP.

[0279] If the wireless communication device 104 or 204 monitors the PDCCH according to a sparser SSSG, then after the wireless communication device 104 or 204 sends an SR on the PUCCH and the SR is pending, or after the wireless communication device 104 or 204 successfully receives the RAR for a random access preamble that is not selected by the MAC entity in a contention-based random access preamble, or after the activation time is activated by the above events (except for the running of the drx-onDurationTimer or drx-InactivityTimer configured for the DRX group), the wireless communication device 104 or 204 should stop monitoring the PDCCH according to the sparser SSSG and start monitoring the PDCCH according to the denser SSSG or all search space sets configured in the current activated DL BWP.

[0280] In some embodiments, if PDCCH skipping is performed by the wireless communication device 104 or 204, the wireless communication device 104 or 204 shall stop skipping duration and start monitoring PDCCH at the first time slot or symbol or at least application delay (application delay) symbols of valid PDCCH monitoring opportunity according to the denser SSSG or all search space sets configured in the current activated DL BWP, the first time slot or symbol or at least application delay symbols. The valid PDCCH monitoring opportunity of delay symbols is after the last symbol of the SR on the PUCCH and the SR is waiting to be processed, or after the last symbol of the RAR or PDCCH with CRC scrambled by the RA-RNTI for the random access preamble that is not selected by the MAC entity in the contention-based random access preamble, or after the activation time is activated by the above events (except the running of the drx-onDurationTimer or drx-InactivityTimer configured for the DRX group), or when the wireless communication device 104 or 204 is performing PDCCH skipping or before starting to perform PDCCH skipping or when the wireless communication device 104 or 204 is performing sparse SSSG monitoring or before starting to perform sparse SSSG monitoring after the wireless communication device 104 or 204 monitors the search space set provided by recoverySearchSpaceId.

[0281] In some embodiments, if the wireless communication device 104 or 204 monitors the PDCCH according to a sparser SSSG, the wireless communication device 104 or 204 should stop monitoring the PDCCH according to the sparser SSSG and start monitoring the PDCCH according to the denser SSSG or all search space sets configured in the current activated DLBWP at the first time slot or symbol or at least application delay symbols of the valid PDCCH monitoring opportunity, and the first time slot or symbol or at least application delay symbols of the valid PDCCH monitoring opportunity is after the last symbol of the SR on the PUCCH and the SR is waiting to be processed, or after the last symbol of the RAR or PDCCH using the CRC scrambled by the RA-RNTI for the random access preamble that is not selected by the MAC entity in the contention-based random access preamble.

[0282] In some embodiments, the sparser SSSG may be SSSG0 in NR-U, or an SSSG with sparse PDCCH monitoring behavior, or an SSSG with fewer PDCCH monitoring opportunities, or an SSSG with fewer search space sets, or a default SSSG, or a PS SSSG. In some embodiments, the denser SSSG may be SSSG1 in NR-U, or an SSSG with dense PDCCH monitoring behavior, or an SSSG with more PDCCH monitoring opportunities, or an SSSG with more search space sets, or all SSSs configured in the BWP, or a denser SSSG among the SSSGs configured in the BWP.

[0283] Example 3: UE capability parameters

[0284] like Figure 6 As described in step 602, the wireless communication device 104 or 204 may report multiple UE capability parameters related to SSSG switching and / or PDCCH skipping. The multiple UE capability parameters may include at least one of the following items:

[0285] (1)searchSpaceSetGroupSwitchingwithDCI-r17:

[0286] Indicates whether the wireless communication device 104 or 204 supports switching among N search space sets using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 1_2 monitoring.

[0287] (2)searchSpaceSetGroupSwitchingwithoutDCI-r17:

[0288] Indicates whether the wireless communication device 104 or 204 supports switching among N search space sets without monitoring using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI1_2.

[0289] (3)pdcchSkippingwithDCI-r17:

[0290] Indicates whether the wireless communication device 104 or 204 supports stopping monitoring PDCCH or PDCCH skipping using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 1_2 monitoring.

[0291] (4)pdcchSkippingwithoutDCI-r17:

[0292] Indicates whether the wireless communication device 104 or 204 supports stopping monitoring PDCCH or PDCCH skipping without using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI1_2 monitoring.

[0293] (5)pdcchSkippingcapability2-r17:

[0294] Indicates whether the wireless communication device 104 or 204 supports a minimum delay for switching among SSSG switching or PDCCH skipping: P symbols. In some implementations, for μ=0 / 1 / 2 / 3 SCS, P may be an integer equal to 10 / 12 / 22 / 25 symbols.

[0295] In some embodiments, if the wireless communication device 104 or 204 supports this feature, the wireless communication device 104 or 204 needs to report searchSpaceSetGroupSwitchingwithDCI-r17 or searchSpaceSetGroupSwitchingwithoutDCI-r17 or pdcchSkippingwithDCI-r17 or pdcchSkippingwithoutDCI-r17 or pdcchMonitoringAdaptationwithDCI-r17 or pdcchMonitoringAdaptationwithoutDCI-r17.

[0296] (6)jointPdcchSkippingAcrossCells-r17:

[0297] Indicates whether the wireless communication device 104 or 204 supports being configured with a set of cells and performing PDCCH skipping jointly across these cells. If the wireless communication device 104 or 204 supports this feature, the wireless communication device 104 or 204 needs to report pdcchSkippingwithDCI-r17 or pdcchSkippingwithoutDCI-r17.

[0298] (7) pdcchMonitoringAdaptationwithDCI-r17: (configured for each frequency band)

[0299] Indicates whether the wireless communication device 104 or 204 supports monitoring switching among N search space sets and PDCCH skipping of M different skip duration values ​​using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 2_2.

[0300] (8) pdcchMonitoringAdaptationwithoutDCI-r17: (configured for each frequency band)

[0301] Indicates whether the wireless communication device 104 or 204 supports switching among N search space sets and M different skip duration values ​​without monitoring using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI1_2.

[0302] (9)dataProcessingforpdcchSkipping-r17:

[0303] Indicates whether the wireless communication device 104 or 204 supports monitoring the PDCCH for scheduling retransmission data, or the PDCCH for scheduling the PUSCH corresponding to the scheduling request (SR) on the physical uplink control channel (PUCCH) in the waiting state, or the PDCCH monitoring after the wireless communication device 104 or 204 successfully receives the random access response (RAR) for the random access preamble that is not selected by the medium access control (MAC) entity in the contention-based random access preamble, or the PDCCH during the activation time activated by the event (except the running of drx-onDurationTimer or drx-InactivityTimer), or when the wireless communication device is performing PDCCH skipping or before starting to perform PDCCH skipping, or when the wireless communication device is performing sparse SSSG monitoring or before starting to perform sparse SSSG monitoring, after the wireless communication device monitors the search space set provided by recoverySearchSpaceId.

[0304] If the wireless communication device 104 or 204 supports this feature, the wireless communication device 104 or 204 needs to report pdcchSkippingwithDCI-r17 or pdcchSkippingwithoutDCI-r17 or pdcchMonitoringAdaptationwithDCI-r17 or pdcchMonitoringAdaptationwithoutDCI-r17. In some implementations, when the UE satisfies at least one of the above events, the wireless communication device 104 or 204 ignores PDCCH skipping.

[0305] In some implementations, the wireless communication device 104 or 204 applies PDCCH skipping after all data is successfully received.

[0306] (10)dataProcessingforsearchSpaceSwitching-r17:

[0307] Indicates whether the UE supports monitoring the PDCCH for scheduled retransmission data and applying search space set group switching after all data are successfully received. If the UE supports this feature, the UE needs to report searchSpaceSwitchingwithDCI-r17 or searchSpaceSwitchingwithoutDCI-r17.

[0308] (11)psSearchSpaceGroupMornitoring-r17:

[0309] Indicates whether the UE supports monitoring PDCCH according to energy-saving search space set groups.

[0310] (12)SearchSpaceGroup-r17:

[0311] Indicates whether the UE supports search space set switching between two search space sets or N1 search space sets, where N1 is an integer greater than 2.

[0312] (13) Number of search space groups - r17, indicating the number of search space groups supported by the wireless communication device 104 or 204.

[0313] (14) Number of skipping duration - r17, indicating the number of skipping durations supported by the wireless communication device 104 or 204.

[0314] (15)pdcchMonitoringSwitchingCapability-r17:

[0315] The minimum delay indicating whether the UE supports SSSG switching or PDCCH skipping is 25 symbols (for μ=3).

[0316] Multiple UE capability parameters may be configured for each frequency band, or may be configured only for frequency band 2 (FR2).

[0317] The detailed function of each UE capability parameter may be as follows.

[0318] 1.searchSpaceSetGroupSwitchingwithDCI-r17 (configured for each frequency band):

[0319] Indicating whether the wireless communication device 104 or 204 supports monitoring of switching among N search space sets using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 2_2 including the following functional components:

[0320] For example, N=3, and three SSSGs include group 0, group 1, and PS SSSG.

[0321] -Monitor DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 1_2 using the search space set switching field;

[0322] -Support switching of search space sets using PDCCH decoding in group 1 or a group with intensive PDCCH monitoring behavior or in all Type3-PDCCH CSS sets and / or USS sets configured in the activated DL BWP;

[0323] -Supports switching of DRX-RetransmissionTimer DL / UL operations in all Type3-PDCCH CSS sets and / or USS sets configured in group 1 or groups with intensive PDCCH monitoring behavior or in the activated DL BWP

[0324] Search space set group;

[0325] - Supports the search space set group for SR transmission on PUCCH in the waiting state in switching group 1 or a group with intensive PDCCH monitoring behavior or in all Type3-PDCCH CSS sets and / or USS sets configured in the activated DL BWP;

[0326] -Supports the search space set group for RAR reception or PDCCH decoding with CRC scrambled by RA-RNTI for random access preambles not selected by the MAC entity in contention-based random access preambles in switching group 1 or a group with intensive PDCCH monitoring behavior or in all Type3-PDCCH CSS sets and / or USS sets configured in the activated DL BWP;

[0327] -Support PS timer switching back to the original search space set or default search space set;

[0328] -Support skipping duration to switch back to the original search space group or the default search space group;

[0329] - If only two SSSGs are supported by the UE, the switching timer is supported to switch back to the original search space set, or switch back to the PS SSSG;

[0330] -Supports DRX-RetransmissionTimer DL / UL switching back to the original search space set or PS SSSG.

[0331] -Support switching back to PS SSSG for HARQ-ACK reporting of recent DL data.

[0332] Unless the wireless communication device 104 or 204 supports joint Search Space Group Switching Across Cells-r16, the wireless communication device 104 or 204 may switch the search space set group independently for different cells. Unless the wireless communication device 104 or 204 supports joint Search Space Group Switching Across Cells-r16, the wireless communication device 104 or 204 may support Search Space Set Group Switching Capability-1: P. In some embodiments, for μ=0 / 1 / 2 / 3, P=25 / 25 / 25 / 25 symbols.

[0333] Note that the default search space set group is configured by higher layer parameters or selected from Group 0, Group 1 and all Type 3-PDCCH CSS sets and / or USS sets configured in the activated DLBWP. Also note that the original search space set group is PS SSSG or Group 0.

[0334] 2.searchSpaceSetGroupSwitchingwithoutDCI-r17: (configured for each frequency band)

[0335] Indicates whether the wireless communication device 104 or 204 supports switching among N search space sets without using DCI 0_1 or DCI1_1 or DCI 0_2 or DCI 2_2 monitoring (e.g., (i) implicit PDCCH decoding, DRX-retransmission timer DL / UL running, (ii) SR transmission on PUCCH in pending state, (iii) RAR reception or PDCCH decoding with CRC scrambled by RA-RNTI for a random access preamble not selected by the MAC entity in a contention-based random access preamble, (iv) PS timer, (v) end of PDCCH skipping, HARQ-ACK reporting) including the following functional components:

[0336] For example, N=3, and three SSSGs include group 0, group 1, and PS SSSG.

[0337] - Supports the search space set group for PDCCH decoding in switching group 1 or a group with intensive PDCCH monitoring behavior or in all Type3-PDCCH CSS sets and / or USS sets configured in the activated DL BWP.

[0338] - Supports switching the search space set group for DRX-Retransmission Timer DL / UL operation in all Type3-PDCCH CSS sets and / or USS sets configured in the activated DL BWP in group 1 or the group with intensive PDCCH monitoring behavior or.

[0339] - A search space set group supporting SR transmission on PUCCH in the waiting state in switching group 1 or a group with intensive PDCCH monitoring behavior or in all Type3-PDCCH CSS sets and / or USS sets configured in the activated DL BWP.

[0340] -Supports the search space set group for RAR reception or PDCCH decoding using CRC scrambled by RA-RNTI for random access preambles not selected by the MAC entity in contention-based random access preambles in all Type3-PDCCH CSS sets and / or USS sets configured in switching group 1 or a group with intensive PDCCH monitoring behavior or in an activated DL BWP.

[0341] -Supports PS timer switching back to the original search space set group or default search space set.

[0342] -Support skipping duration to switch back to the original search space set group or the default search space set group.

[0343] - If only 2 SSSGs or PS SSSGs are supported by the UE, the switching timer is supported to switch back to the original search space set.

[0344] -Support DRX-Retransmission Timer DL / UL switching back to the original search space set group or PS SSSG.

[0345] -Support switching back to PS SSSG for HARQ-ACK reporting of recent DL data.

[0346] Unless the wireless communication device 104 or 204 supports jointSearchSpaceGroupSwitchingAcrossCells-r16, the wireless communication device 104 or 204 may switch the search space set group independently for different cells. Unless the wireless communication device 104 or 204 supports jointSearchSpaceGroupSwitchingAcrossCells-r16, the wireless communication device 104 or 204 may support search space set group switching capability-1: P. In some embodiments, for μ=0 / 1 / 2 / 3, P=25 / 25 / 25 / 25 symbols.

[0347] 3.pdcchSkippingwithDCI-r17: (configured for each frequency band)

[0348] Indicates whether the wireless communication device 104 or 204 supports stopping monitoring of the PDCCH during one of two skip duration values ​​using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 2_2 monitoring including the following functional components:

[0349] -Monitor DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 1_2 using the PDCCH skip field;

[0350] - Support PDCCH skipping to stop PDCCH decoding during the skip duration;

[0351] - Support PDCCH skipping with stopping DRX-retransmission timer DL / UL running;

[0352] - Support PDCCH skipping of SR transmission on PUCCH in stop waiting state;

[0353] - Support stopping PDCCH skipping for RAR reception or PDCCH decoding with CRC scrambled by RA-RNTI for a random access preamble that is not selected by the MAC entity in a contention-based random access preamble;

[0354] -Support PS timer switching back to the original search space set or default search space set;

[0355] -Support skipping duration to switch back to the original search space group or the default search space group;

[0356] -Support switching timer back to original PDCCH skipping;

[0357] -Support DRX-Retransmission Timer DL / UL switching back to original PDCCH skipping.

[0358] -Supports switching back to the original PDCCH skipping for HARQ-ACK reporting of recent DL data.

[0359] Unless the wireless communication device 104 or 204 supports jointSearchSpaceGroupSwitchingAcrossCells-r16 or jointPdcchSkippingAcrossCells-r17, the wireless communication device 104 or 204 may switch the search space set group independently for different cells. Unless the wireless communication device 104 or 204 may support jointSearchSpaceGroupSwitchingAcrossCells-r16 or jointPdcchSkippingAcrossCells-r17, the wireless communication device 104 or 204 may support search space set group switching capability-1: P. In some embodiments, for μ=0 / 1 / 2 / 3, P=25 / 25 / 25 / 25 symbols.

[0360] Note that the default search space set group is configured by a higher layer parameter or the original search space set group or the original search space set group, or is selected from Group 0, Group 1, and a regular SSSG (e.g., all Type3-PDCCH CSS sets and / or USS sets configured in an activated DL BWP in a cell or across a set of cells bound for SSSG handover). Also note that the original search space set group is the most recent search space set group before a PDCCH skip is triggered. In addition, the original PDCCH skip is the PDCCH skip with the most recent PDCCH skip duration.

[0361] 4.pdcchSkippingwithoutDCI-r17: (configured for each frequency band)

[0362] Indicates whether the wireless communication device 104 or 204 supports PDCCH skipping without using DCI 0_1 or DCI1_1 or DCI 0_2 or DCI 2_2 monitoring (e.g., (i) implicit PDCCH decoding, DRX-RetransmissionTimer DL / UL running, (ii) SR transmission on PUCCH in pending state, (iii) RAR reception or PDCCH decoding with CRC scrambled by RA-RNTI for a random access preamble not selected by the MAC entity in a contention-based random access preamble, (iv) PS timer, (v) end of PDCCH skipping, HARQ-ACK reporting) including the following functional components:

[0363] - Support PDCCH skipping to stop PDCCH decoding during the skip duration.

[0364] -Supports PDCCH skipping with stopping DRX-Retransmission Timer DL / UL running.

[0365] - Support PDCCH skipping of SR transmission on PUCCH in stop waiting state;

[0366] - Support stopping PDCCH skipping for RAR reception or PDCCH decoding with CRC scrambled by RA-RNTI for a random access preamble that is not selected by the MAC entity in a contention-based random access preamble;

[0367] -Support PS timer switching back to the original search space set or default search space set;

[0368] -Support skipping duration to switch back to the original search space group or the default search space group;

[0369] -Support switching timer back to original PDCCH skipping;

[0370] -Support DRX-Retransmission Timer DL / UL switching back to original PDCCH skipping.

[0371] -Supports switching back to the original PDCCH skipping for HARQ-ACK reporting of recent DL data.

[0372] Unless the wireless communication device 104 or 204 supports jointSearchSpaceGroupSwitchingAcrossCells-r16 or jointPdcchSkippingAcrossCells-r17, the wireless communication device 104 or 204 may switch search space set groups independently for different cells. Unless the wireless communication device 104 or 204 supports jointSearchSpaceGroupSwitchingAcrossCells-r16 or jointPdcchSkippingAcrossCells-r17, the wireless communication device 104 or 204 supports search space set group switching capability-1: P. In some embodiments, for μ=0 / 1 / 2 / 3, P=25 / 25 / 25 / 25 symbols.

[0373] 5.pdcchSkippingcapability2-r17 (configured for each frequency band)

[0374] Indicates whether the wireless communication device 104 or 204 supports PDCCH skipping function-2: P. If the wireless communication device 104 or 204 supports this feature, the wireless communication device 104 or 204 needs to report searchSpaceSetGroupSwitchingwithDCI-r17 or searchSpaceSetGroupSwitchingwithoutDCI-r17 or pdcchSkippingwithDCI-r17 or pdcchSkippingwithDCI-r17 or pdcchMonitoringAdaptationwithDCI-r17 or pdcchMonitoringAdaptationwithDCI-r17. In some embodiments, for μ=0 / 1 / 2 / 3 SCS, P=10 / 12 / 22 / 25 symbols.

[0375] Note that this capability is used to switch between search space set group switching and PDCCH skipping.

[0376] 6.jointPdcchSkippingAcrossCells-r17 (for each frequency band combination)

[0377] Indicates whether the wireless communication device 104 or 204 supports being configured with a set of cells and jointly skipping PDCCH monitoring on these cells. If the wireless communication device 104 or 204 supports this feature, the wireless communication device 104 or 204 needs to report pdcchSkippingwithDCI-r17 or pdcchSkippingwithoutDCI-r17 or pdcchMonitoringAdaptationwithDCI-r17 or pdcchMonitoringAdaptationwithoutDCI-r17.

[0378] Note that this capability is used to switch between search space set group switching and PDCCH skipping.

[0379] 7.pdcchMonitoringAdaptationwithDCI-r17: (configured for each frequency band)

[0380] Indicating whether the wireless communication device 104 or 204 supports switching among N search space sets and M different skip duration values ​​of PDCCH skipping using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 2_2 monitoring including the following functional components:

[0381] For example, N=2 and M=2.

[0382] - Monitoring DCI using PDCCH monitoring adaptation field or PDCCH skip indication for search space set switching

[0383] 0_1 or DCI 1_1 or DCI 0_2 or DCI 1_2;

[0384] -Support switching of non-default search space set groups or groups with intensive PDCCH monitoring behavior or search space set groups for PDCCH decoding in all Type3-PDCCH CSS sets and / or USS sets configured in the activated DLBWP;

[0385] -Support switching of the search space set group for DRX-Retransmission Timer DL / UL operation in all Type3-PDCCH CSS sets and / or USS sets configured in a non-default search space set group or a group with intensive PDCCH monitoring behavior or in an activated DLBWP;

[0386] -Support switching of the search space set group for SR transmission on PUCCH in the waiting state in all Type3-PDCCH CSS sets and / or USS sets configured in the activated DLBWP in a non-default search space set group or a group with intensive PDCCH monitoring behavior;

[0387] -Support switching of search space set groups in non-default search space set groups or groups with intensive PDCCH monitoring behavior or in all Type3-PDCCH CSS sets and / or USS sets configured in activated DLBWP for RAR reception or PDCCH decoding with CRC scrambled by RA-RNTI for random access preambles not selected by the MAC entity in contention-based random access preambles;

[0388] -Support PS timer switching back to the default search space set;

[0389] -Support skipping duration to switch back to the default search space set group;

[0390] -Support switching timer back to the default search space set;

[0391] -Support DRX-Retransmission Timer DL / UL to switch back to the original PDCCH monitoring behavior.

[0392] -Support switching back to the original PDCCH monitoring behavior for HARQ-ACK reporting of recent DL data.

[0393] Unless the wireless communication device 104 or 204 supports jointSearchSpaceGroupSwitchingAcrossCells-r16 or jointPdcchSkippingAcrossCells-r17, the wireless communication device 104 or 204 may switch search space groups independently for different cells. Unless the wireless communication device 104 or 204 supports jointSearchSpaceGroupSwitchingAcrossCells-r16 or jointPdcchSkippingAcrossCells-r17, the wireless communication device 104 204 supports search space group switching capability-1: P. In some embodiments, for μ=0 / 1 / 2 / 3, P=25 / 25 / 25 / 25 symbols.

[0394] Note that the default search space set group is configured by a higher layer parameter or the original search space set group, or is selected from Group 0, Group 1, and all Type3-PDCCH CSS sets and / or USS sets configured in the activated DL BWP. In addition, note that the original PDCCH monitoring behavior is the most recent PDCCH monitoring behavior involving the following items: Group 0, Group 1, PDCCH skipping with a first skip duration, PDCCH skipping with a second skip duration, or all Type-3 CSS sets or USS sets configured in the activated DL BWP.

[0395] 8.pdcchMonitoringAdaptationwithoutDCI-r17: (configured for each frequency band)

[0396] Indicates whether the wireless communication device 104 or 204 supports switching among N search space sets and M different skip duration values ​​of PDCCH skipping including the following functional components (e.g., (i) implicit PDCCH decoding, DRX-RetransmissionTimer DL / UL operation, (ii) SR transmission on PUCCH in pending state, (iii) RAR reception or PDCCH decoding with CRC scrambled by RA-RNTI for a random access preamble not selected by the MAC entity in a contention-based random access preamble, (iv) PS timer, (v) end of PDCCH skipping, HARQ-ACK reporting):

[0397] For example, N=2 and M=2.

[0398] -Supports switching of search space set groups for PDCCH decoding in non-default search space set groups or groups with intensive PDCCH monitoring behavior or in all Type3-PDCCH CSS sets and / or USS sets configured in the activated DLBWP.

[0399] -Supports switching of the search space set group for DRX-Retransmission Timer DL / UL operation in a non-default search space set group or a group with intensive PDCCH monitoring behavior or in all Type3-PDCCH CSS sets and / or USS sets configured in an activated DLBWP.

[0400] -Supports switching of the search space set group for SR transmission on PUCCH in the waiting state in a non-default search space set group or a group with intensive PDCCH monitoring behavior or in all Type3-PDCCH CSS sets and / or USS sets configured in the activated DLBWP.

[0401] -Supports switching of search space set groups in non-default search space set groups or groups with intensive PDCCH monitoring behavior or in all Type3-PDCCH CSS sets and / or USS sets configured in an activated DLBWP for RAR reception or PDCCH decoding using CRC scrambled by RA-RNTI for random access preambles that are not selected by the MAC entity in contention-based random access preambles.

[0402] -Support PS timer switching back to default search space set.

[0403] - Support skipping duration to switch back to default search space set group.

[0404] -Supports switching timer to switch back to default search space set group.

[0405] -Support DRX-Retransmission Timer DL / UL switching back to the original PDCCH monitoring behavior.

[0406] -Supports switching back to the original PDCCH monitoring behavior triggered by DCI for HARQ-ACK reporting of recent DL data.

[0407] Unless the wireless communication device 104 or 204 supports jointSearchSpaceGroupSwitchingAcrossCells-r16 or jointPdcchSkippingAcrossCells-r17, the wireless communication device 104 or 204 may switch search space set groups independently for different cells. Unless the wireless communication device 104 or 204 supports jointSearchSpaceGroupSwitchingAcrossCells-r16 or jointPdcchSkippingAcrossCells-r17, the wireless communication device 104 or 204 supports search space set group switching capability-1: P. In some embodiments, for μ=0 / 1 / 2 / 3 SCS, P may be an integer equal to 10 / 12 / 22 / 25 symbols.

[0408] 9.dataProcessingforpdcchSkipping-r17 (configured for each frequency band)

[0409] Indicates whether the wireless communication device 104 or 204 supports monitoring the PDCCH for scheduling retransmission data, or the PDCCH for scheduling the PUSCH corresponding to the scheduling request (SR) on the physical uplink control channel (PUCCH) in the waiting state, or the PDCCH monitoring after the wireless communication device successfully receives a random access response (RAR) for a random access preamble that is not selected by the medium access control (MAC) entity in the contention-based random access preamble, or the PDCCH during the activation time activated by an event (except the running of drx-onDurationTimer or drx-InactivityTimer), or when the wireless communication device is performing PDCCH skipping or before starting to perform PDCCH skipping, or when the wireless communication device is performing sparse SSSG monitoring or before starting to perform sparse SSSG monitoring, after the wireless communication device monitors the search space set provided by recoverySearchSpaceId. In some implementations, if the wireless communication device 104 or 204 supports this feature, the wireless communication device 104 or 204 needs to report pdcchSkippingwithDCI-r17 or pdcchSkippingwithoutDCI-r17.

[0410] In some implementations, when the UE satisfies at least one of the above events, the wireless communication device 104 or 204 ignores PDCCH skipping.

[0411] In some implementations, the wireless communication device 104 or 204 applies PDCCH skipping after all data is successfully received.

[0412] 10.dataProcessingforsearchSpaceSetGroupSwitching-r17 (configured for each frequency band)

[0413] Indicates whether the wireless communication device 104 or 204 supports monitoring the PDCCH for scheduled retransmission data and applying search space set group switching after all data is successfully received. If the wireless communication device 104 or 204 supports this feature, the wireless communication device 104 or 204 needs to report searchSpaceSwitchingwithDCI-r17 or searchSpaceSwitchingwithoutDCI-r17.

[0414] 11.psSearchSpaceGroupMornitoring-r17 (configured for each frequency band)

[0415] Indicates whether the wireless communication device 104 or 204 supports monitoring the PDCCH according to the energy-saving search space set group.

[0416] In some embodiments, the energy-saving search space set group may not involve the PDCCH monitoring opportunity of the PDCCH of the bearer belonging to the Type-3 CSS set or USS set using the DCI scrambled by RNTI. In some embodiments, the energy-saving search space set group may be associated with the PS timer, and when the PS timer is running, the wireless communication device 104 or 204 does not monitor the PDCCH of the bearer belonging to the Type-3 CSS set or USS set using the DCI scrambled by RNTI according to the PSSSSG. In some embodiments, the energy-saving search space set group may be a group with restrictions on the parameters of PDCCH monitoring, and the restrictions include at least one of the following items: 1) the bitmap of the monitoring symbol in the time slot is all 0, 2) the duration T s 0 time slot, 3) PDCCH monitoring period k s NULL, 4) PDCCH monitoring period k s Invalid, 5) PDCCH monitoring offset 0 s Equal to (k s -1) time slots, and / or 6) PDCCH monitoring occasion is equal to 0.

[0417] 12.SearchSpaceGroup-r17 (configured for each frequency band)

[0418] Indicates whether the wireless communication device 104 or 204 supports search space set switching between two search space sets or three search space sets.

[0419] 13.pdcchMonitoringSwitchingCapability-r17 (configured for band 2)

[0420] The minimum delay indicating whether the wireless communication device 104 or 204 supports SSSG switching or PDCCH skipping is 25 symbols (for μ=3).

[0421] Here, P corresponding to search space set group switching capability-1 or search space set group switching capability-2 or PDCCH skipping capability-1 or PDCCH skipping capability-2 indicates a minimum delay between SSSG switching or PDCCH skipping.

[0422] Embodiment 4: Triggering event for SSSG switching and / or PDCCH skipping

[0423] Multiple trigger events may be associated with multiple control information. The multiple control information may include at least one of the following items: 1) DCI indication information, 2) switching timer for SSSG switching, 3) PS timer for PS SSSG, 4) PDCCH decoding in a sparser SSSG, 5) SR transmission on PUCCH in a waiting state, 6) RAR reception for a random access preamble that is not selected by the MAC entity in a contention-based random access preamble, and / or 7) PDCCH monitoring adaptation mode including SSSG switching and PDCCH skipping configured by RRC signaling.

[0424] As used herein, including in the claims, "or" as used in a list of items (e.g., a list of items suffixed by a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C refers to A or B or C or AB or AC or BC or ABC (i.e., A and B and C). In addition, as used herein, the phrase "based on" should not be interpreted as referring to a closed set of conditions. For example, an exemplary step described as "based on condition A" may be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0425] The various embodiments described above and in the claims may be implemented as computer code instructions executed by one or more processors in the wireless communication device (or UE) 104 or 204 or the wireless communication node 102 or 202. A computer readable medium may store the computer code instructions.

[0426] Although various embodiments of the present solution have been described above, it should be understood that these embodiments are presented only as examples and not as limitations. Similarly, various schematic diagrams may illustrate exemplary architectures or configurations, which are provided so that those of ordinary skill in the art can understand the exemplary features and functions of the present solution. However, those of ordinary skill in the art will understand that the solution is not limited to the example architectures or configurations shown, but may be implemented using various alternative architectures and configurations. In addition, as those of ordinary skill in the art will understand, one or more features of an embodiment may be combined with one or more features of another embodiment described herein. Therefore, the breadth and scope of the present disclosure should not be limited by any of the above-described exemplary embodiments.

[0427] It should also be understood that any reference to an element using names such as "first," "second," etc. herein generally does not limit the number or order of these elements. Instead, these names may be used herein as a convenient means of distinguishing two or more elements or instances of elements. Thus, reference to a first and a second element does not mean that only two elements may be used, or that the first element must precede the second element in some manner.

[0428] In addition, those skilled in the art will understand that information and signals may be represented using any of a variety of different technologies and techniques. For example, the data, instructions, commands, information, signals, bits, and symbols that may be referenced in the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0429] Those of ordinary skill in the art will further understand that any of the various exemplary logic blocks, modules, processors, devices, circuits, methods, and functions described in conjunction with the various aspects disclosed herein may be implemented by electronic hardware (e.g., digital implementation, analog implementation, or a combination of both), firmware, various forms of programs or design codes in conjunction with instructions (which, for convenience, may be referred to herein as "software" or "software modules"), or any combination of these technologies. In order to clearly illustrate this interchangeability of hardware, firmware, and software, various exemplary components, blocks, modules, circuits, and steps have been described above generally in terms of their functions. Whether such functionality is implemented using hardware, firmware, software, or a combination thereof depends on the specific application and the design constraints imposed on the overall system. Technicians may implement the described functionality in various ways for each specific application, but such implementation decisions will not result in a departure from the scope of the present disclosure.

[0430] Further, it will be understood by those of ordinary skill in the art that the various exemplary logic blocks, modules, devices, components and circuits described herein may be implemented in or performed by an integrated circuit (IC), which may include a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device or any combination thereof. The logic blocks, modules and circuits may also include antennas and / or transceivers to communicate with various components within a network or within a device. A general purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller or state machine. The processor may also be implemented as a combination of computing devices, for example, a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors combined with a DSP core, or a combination of any other suitable configurations that perform the functions described herein.

[0431] If implemented in software, these functions can be stored as one or more instructions or codes on a computer-readable medium. Therefore, the steps of the method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable media include computer storage media and communication media, and communication media include any medium that can allow a computer program or code to be transferred from one location to another. The storage medium can be any available medium that a computer can access. As an example and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage device, or any other medium that can be used to store the required program code in the form of instructions or data structures and can be accessed by a computer.

[0432] In this document, the term "module" as used herein refers to software, firmware, hardware, and any combination of these elements for performing the relevant functions described herein. In addition, for the purpose of discussion, various modules are described as discrete modules; however, as is clear to one of ordinary skill in the art, two or more modules can be combined into a single module that performs relevant functions according to embodiments of the present solution.

[0433] In addition, memory or other storage devices and communication components can be used in embodiments of the present solution. It should be understood that, for the sake of clarity, the above description refers to the embodiments of the present solution described with reference to different functional units and processors. However, it is apparent that any appropriate functional distribution can be used between different functional units, processing logic elements or domains without detracting from the present solution. For example, the functions performed by a separate processing logic element or controller shown can be performed by the same processing logic element or controller. Therefore, reference to a specific functional unit is only a reference to an appropriate means for providing a function, rather than indicating a strict logical or physical structure or organization.

[0434] Various modifications to the embodiments described in this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the embodiments shown herein, but rather to be given the broadest scope consistent with the novel features and principles disclosed herein, as set forth in the claims.

Claims

1. A method for control channel monitoring, comprising: The wireless communication device reports a plurality of capabilities of the wireless communication device to the wireless communication node; The wireless communication device receives control information from the wireless communication node; The wireless communication device performs physical downlink control channel PDCCH monitoring using a set of search space sets SSS selected from at least one search space set group SSSG according to the control information, wherein the number of the at least one SSSG is N and N is an integer greater than or equal to 1, or each of the at least one SSSG includes a number of SSSs that is at least zero and at most equal to a maximum number of SSSs configured in the bandwidth part BWP; The wireless communication device performs PDCCH skipping according to a skip duration in response to at least one triggering event associated with the control information; and the wireless communication device switching from PDCCH skipping to PDCCH monitoring using a default SSSG after the skip duration ends, wherein the value of the skip duration is determined among M PDCCH skip duration values ​​in a list of candidate skip duration values ​​configured via higher layer signaling, and M is an integer greater than or equal to 1; wherein, when the wireless communication device is performing PDCCH monitoring according to the PDCCH skipping, the wireless communication device skips the PDCCH monitoring according to the PDCCH skipping; and The wireless communication device performs PDCCH monitoring in response to a scheduling request SR sent on a physical uplink control channel PUCCH and waiting to be processed.

2. The method according to claim 1, wherein: The at least one SSSG configured in the BWP includes a power-saving PS SSSG.

3. The method according to claim 2, wherein: At least one of the following conditions exists: The PS SSSG is not configured with a search space set through higher layer signaling, or the number of search space sets in the PS SSSG is zero; The PS SSSG is an SSSG configured with a restriction on at least one PDCCH monitoring parameter of any search space set in the PS SSSSG, wherein the restriction includes at least one of the following items: the bitmap of the monitoring symbol in the time slot is all 0, the duration T s 0 time slot, PDCCH monitoring period k s Empty, k s Invalid, PDCCH monitoring offset O s equal k s -1 time slot, the start position of the PSSSSG is the next adjacent time slot, or the number of PDCCH monitoring opportunities is equal to 0; or The PS SSSG is associated with a power saving PS timer, and during the operation of the PS timer, the wireless communication device does not monitor the PDCCH in a type-3 common search space CSS set or a user equipment specific search space USS set.

4. The method according to claim 2, wherein: The at least one SSSG configured in the BWP includes at least one of the following: A normal SSSG, including at least one search space set of the type including a Type-3 common search space Type-3 CSS or a user equipment specific search space USS, or A conventional SSSG includes all search space sets configured in a downlink DL BWP in a cell or across a group of cells bundled for SSSG handover or PDCCH skipping, Here, N is an integer greater than 1.

5. The method according to claim 4, wherein: A handover timer is associated with the normal SSSG or the conventional SSSG, and the handover timer is set to: A value configured by a higher layer parameter when the wireless communication device starts monitoring the PDCCH according to the normal SSSG or the conventional SSSG; or A value configured by a higher layer parameter when the wireless communication device is monitoring the PDCCH according to the normal SSSG or the conventional SSSG and detects: any PDCCH, a PDCCH with scheduling downlink control information DCI, or a PDCCH with an SSSG switching indication.

6. The method according to claim 1, wherein: The at least one SSSG is classified according to at least one of the following parameters: a radio network temporary identifier RNTI type including at least one of the following: C-RNTI, CI-RNTI, CS-RNTI, INT-RNTI, SFI-RNTI, SP-CSI-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI, TPC-SRS-RNTI and AI-RNTI; a number of SSSs associated with the at least one SSSG, the number of SSSs comprising at least one of the following values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10; an SSS identifier ID comprising at least one integer value greater than or equal to 1 and less than or equal to 39; A search space type including at least one of a Type-3 CSS type or a USS type; a control resource set CORESETID associated with a group of one or more SSSs comprising at least one of the following values: 0, 1, 2, 3, 4, or 5; The number or density of PDCCH monitoring opportunities during a period, the period comprising at least one of: monitoring zero time slots for each time slot, monitoring one time slot .... k s Each time slot monitors a time slot and k s time slots to monitor K time slots or one time slot for each time slot, where, k s is the PDCCH monitoring period, K is greater than or equal to 2 and less than or equal to ( k s -1) positive integer value; or For at least one search space set in one of the at least one SSSG k s , Offset O s or duration T s .

7. The method according to claim 1, wherein: The list of candidate skip duration values ​​includes the PDCCH monitoring period in the SearchSpace information element IE k s a subset of the values ​​of a DRX on-duration timer, or a subset of the values ​​of a DRX inactivity timer, The skip duration value is configured by radio resource control RRC signaling and is selected from a list of candidate skip duration values ​​configured via higher layer signaling, and The difference between each pair of adjacent candidate skip duration values ​​is at least 1 millisecond.

8. The method according to claim 7, wherein: The skip duration is configured according to the reference subcarrier spacing SCS and is decremented by one after each time slot. The reference SCS configuration is the smallest SCS configuration among all configured downlink DL bandwidth parts BWP in the serving cell or in a set of serving cells, and The reference SCS configuration is maintained during the operation of the skip duration.

9. The method according to claim 1, wherein: The SSSG switching between the at least one SSSG or the PDCCH skipping is triggered via an indication in downlink control information DCI, Here, N is an integer greater than 1.

10. The method according to claim 9, wherein: The bit width of the indication field of the DCI is W, W is an integer greater than or equal to 1 and is determined according to a function related to the SSSG switching or the PDCCH skipping or according to the value of the number N of the at least one SSSG or the number M of PDCCH skipping duration values ​​indicated via higher layer signaling.

11. The method according to claim 9, wherein: A leading bit or a most significant bit (MSB) of a field for indicating the SSSG switching or the PDCCH skipping is used to indicate at least one of the following items: Enable or disable PDCCH monitoring according to SSSG, or enable or disable SSSG switching; Enable or disable PDCCH monitoring based on the SSSG configured with restrictions; enabling or disabling the PDCCH skipping according to a skipping duration; or PDCCH monitoring is enabled or disabled according to all SSS configured in an activated downlink DL BWP in a cell or across a group of cells for SSSG handover or PDCCH skip bundling.

12. The method according to claim 11, wherein: One or more remaining bits or non-MSBs of the field for indicating the SSSG switching or the PDCCH skipping are used to indicate at least one of the following: an SSSG identifier ID of an SSSG to which the wireless communication device should switch for performing PDCCH monitoring, wherein the SSSG ID is determined according to a currently monitored SSSG or a value of a bit field indicating that the wireless communication device should perform SSSG switching to monitor PDCCH; The value of the skip duration; a regular SSSG in a cell or across a group of cells bundled for said SSSG handover or said PDCCH skipping; or The SSSG is configured with the restrictions.

13. The method according to claim 3, comprising: The wireless communication device performs PDCCH monitoring to switch to a default SSSG after a plurality of triggering events or expiration of the PS SSSG, The triggering event is related to data processing and is detected by the wireless communication device, and the triggering event includes at least one of the following items: PDCCH decoding; DRX-Retransmission timer DL / UL timer operation; A scheduling request SR transmission on the physical uplink control channel PUCCH in a waiting state; receiving a random access response RAR or PDCCH decoding for a random access preamble not selected by a medium access control MAC entity among contention-based random access preambles using a cyclic redundancy check CRC scrambled by a random access radio network temporary identifier RA-RNTI; the start of an activation time activated by an event other than the running of the drx-onDuration timer or the drx-inactivity timer; or UE monitoring by recovery search space Id The set of search spaces provided; Wherein, the expiration includes at least one of the following items: The PS timer is decremented to 0 or the PS timer expires; or The duration used to determine the validity time of the PS SSSG ends.

14. The method according to claim 4, wherein: In the absence of any indication in the downlink control information DCI, the SSSG switches to another SSSG or switches from PDCCH skipping or switches to PDCCH skipping is triggered, and the method further includes at least one of the following: The wireless communication device switches from the normal SSSG or the conventional SSSG to the PS SSSG or to the PDCCH skip after the switching timer expires; The wireless communication device switches from the conventional SSSG to the normal SSSG after the switching timer expires; The wireless communication device switches from a denser normal SSSG to a sparser normal SSSG after the switching timer expires, wherein the SSS, the RNTI type, the PDCCH monitoring opportunity, or T s value, or k s Compared with the value, the denser normal SSSG includes more SSSs, or more radio network temporary identifier RNTI types, or more PDCCH monitoring opportunities, or a larger T s value, or smaller k s value; or When the wireless communication device detects a plurality of trigger events related to data processing, the wireless communication device skips switching from the PS SSSG or from the PDCCH to a default SSSG, The default SSSG is configured through radio resource control RRC signaling or is predetermined among at least one of the following: at least one normal SSSG or at least one conventional SSSG.

15. The method of claim 4, wherein: The SSSG switching between the at least one SSSG includes switching between SSSs belonging to at least one of a type-3 common search space Type-3 CSS set and a UE-specific search space USS set; and All SSSs in the conventional SSSG include all SSSs belonging to the Type-3 CSS set and USS set, and are configured in the DLBWP.

16. The method according to claim 4, wherein: The minimum delay for SSSG switching between the at least one SSSG or switching to or from PDCCH skipping is 25 symbols for subcarrier spacing configuration value μ=0 / 1 / 2 for capability 1 or 10 / 12 / 22 symbols for μ=0 / 1 / 2 for capability 2.

17. The method of claim 16, wherein: the minimum delay for μ=3 is no greater than 36 symbols, and the minimum delay for μ=3 for capability 1 is no less than the minimum delay for μ=3 for capability 2; or The minimum delay for μ=3 is 25 symbols for both capability 1 and capability 2; or The minimum delay for μ=3 is no less than 36 symbols, and for capability 1 the minimum delay for μ=3 is 40 symbols.

18. The method according to claim 1, wherein: When the wireless communication device switches to a sparser SSSG or switches to PDCCH skipping, there is a specific duration before the wireless communication device starts PDCCH monitoring according to the sparser SSSG or the PDCCH skipping, and the specific duration is triggered by at least one of the following items: The wireless communication device detects an initial transmission scheduled by a PDCCH, The switch timer expires, or The wireless communication device is triggered to switch to the sparser SSSG or the PDCCH skipping indication DCI.

19. The method according to claim 18, wherein: During the specific duration, the wireless communication device continues PDCCH monitoring according to the current SSSG.

20. The method of claim 18, wherein: The specific duration is triggered or starts after a time slot in which the wireless communication device receives an indication in downlink control information DCI or a time slot in which a switching timer expires, and ends after a time slot in which all downlink scheduled data is successfully received; or The specific duration is triggered or starts after a time slot in which the wireless communication device receives an indication in the DCI or a time slot in which the switching timer expires, and ends after a time slot in which the most recently scheduled data is completely received by using a maximum number of retransmissions; or The specific duration is configured by radio resource control RRC signaling; or The specific duration is determined by a bandwidth part BWP switching delay; or The specific duration ends after the earliest time slot between the time slot in which the most recently scheduled data is completely received by using the maximum number of retransmissions and the time slot in which all downlink scheduled data is successfully received, Among them, all downlink scheduled data is successfully received, including: all physical downlink shared channel PDSCH hybrid automatic repeat request HARQ processing is completed in the serving cell or across the relevant component carrier CC for SSSG switching or PDCCH skip bundling, or all PDSCH and PUSCH processing is completed in the serving cell or across the relevant CC for SSSG switching or PDCCH skip bundling, Here, N is an integer greater than 1.

21. The method according to claim 18, comprising: When discontinuous reception DRX is configured and the wireless communication device is performing PDCCH monitoring according to a sparser SSSG or PDCCH skipping, the wireless communication device starts PDCCH monitoring according to a default SSSG during the duration that the drx-retransmission timer DL / UL is running.

22. The method according to claim 1, comprising: After the wireless communication device sends the SR on the PUCCH and the SR is pending for processing, or after the wireless communication device successfully receives a random access response RAR for a random access preamble that is not selected by a medium access control MAC entity in a contention-based random access preamble, or after the activation time is activated by an event other than the running of a drx-on-duration timer or a drx-inactivation timer, or after the wireless communication device monitors the recovery search space Id After the search space set is provided, the wireless communication device starts PDCCH monitoring according to the default SSSG.

23. The method according to claim 1, comprising: If the wireless communication device sends a physical uplink control channel PUCCH including a scheduling request SR after detecting a DCI format including a PDCCH monitoring adaptation field, the wireless communication device resumes PDCCH monitoring at a first time slot of at least a defined number of symbols, wherein the PDCCH monitoring adaptation field indicates that the wireless communication device skips PDCCH monitoring for a duration on an activated DL BWP of a serving cell, and wherein the first time slot is after the last symbol of the transmission of the PUCCH, or after the last symbol of a random access response RAR or PDCCH decoded using a cyclic redundancy check CRC scrambled by a random access radio network temporary identifier RA-RNTI for a random access preamble that is not selected by a media access control MAC entity in a contention-based random access preamble, or after an activation time is activated by an event other than the running of a drx-on-duration timer or a drx-inactivation timer.

24. The method of claim 18, wherein: The sparser SSSG includes a group of SSSs, each SSS in the group of SSSs having fewer PDCCH monitoring opportunities or a smaller number of search space sets than other SSSs; or The default SSSG is configured by a radio resource control RRC signaling parameter or is predefined in at least one of the following: one or more normal SSSGs or one or more conventional SSSGs; or Whether the wireless communication device should switch to the default SSSG is configured through a radio resource control RRC signaling parameter.

25. The method of claim 1, wherein: The plurality of capabilities of the wireless communication device include at least one of the following: searchSpaceSetGroupSwitchingwithDCI-r17, indicating whether the wireless communication device supports monitoring switching among multiple groups of SSS using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 2_2; searchSpaceSetGroupSwitchingwithoutDCI-r17, indicating whether the wireless communication device supports switching among multiple groups of SSSs without using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 1_2 monitoring; pdcchSkippingwithDCI-r17, indicating whether the wireless communication device supports skipping PDCCH monitoring or PDCCH skipping using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 1_2 monitoring; pdcchSkippingwithoutDCI-r17, indicating whether the wireless communication device supports skipping PDCCH monitoring or PDCCH skipping without using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 1_2 monitoring; pdcchSkippingcapability2-r17, indicating whether the wireless communication device supports a minimum delay P for switching among SSSG or PDCCH skipping, wherein for a subcarrier spacing configuration value µ=0 / 1 / 2 / 3, P=10 / 12 / 22 / 25 symbols, and if the wireless communication device supports the minimum delay, the wireless communication device will report one of the following items to the wireless communication node: searchSpaceSetGroupSwitchingwithDCI-r17, searchSpaceSetGroupSwitchingwithoutDCI-r17, pdcchSkippingwithDCI-r17, pdcchSkippingwithDCI-r17, pdcchMonitoringAdaptationwithDCI-r17, or pdcchMonitoringAdaptationwithoutDCI-r17; jointPdcchSkippingAcrossCells-r17, indicating whether the wireless communication device supports being configured with a group of cells and performing PDCCH skipping jointly on these cells, and wherein, if supported, the wireless communication device will report one of the following items to the wireless communication node: pdcchSkippingwithDCI-r17 or pdcchSkippingwithoutDCI-r17; pdcchMonitoringAdaptationwithDCI-r17, indicating whether the wireless communication device supports monitoring switching among PDCCH skipping of multiple sets of SSS and multiple different skip duration values ​​using DCI0_1 or DCI 1_1 or DCI 0_2 or DCI 2_2; pdcchMonitoringAdaptationwithoutDCI-r17, indicating whether the wireless communication device supports switching among PDCCH skipping of multiple search space sets and multiple different skip duration values ​​without monitoring using DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 2_2; dataProcessingforpdcchSkipping-r17, indicating whether the wireless communication device supports: monitoring the PDCCH for scheduling retransmission data, or the PDCCH for scheduling the PUSCH corresponding to the scheduling request SR on the physical uplink control channel PUCCH in the waiting state, or the PDCCH monitoring after the wireless communication device successfully receives the random access response RAR for the random access preamble not selected by the media access control MAC entity in the contention-based random access preamble, or the PDCCH during the activation time activated by an event other than the operation of the drx-on duration timer or the drx-inactive timer, or the PDCCH monitoring by the wireless communication device Restore Search Space Id PDCCH monitoring after the provided search space set; and whether to support applying PDCCH skipping after all data is successfully received or all hybrid automatic repeat request HARQ processes are completed or all uplink configured grant processes are completed, and wherein, if supported, the wireless communication device will report one of the following items to the wireless communication node: pdcchSkippingwithDCI-r17, pdcchSkippingwithoutDCI-r17, pdcchMonitoringAdaptationwithDCI-r17 or pdcchMonitoringAdaptationwithoutDCI-r17; dataProcessingforsearchSpaceSwitching-r17, indicating whether the wireless communication device supports monitoring the PDCCH for scheduling retransmission data, or the PDCCH for scheduling the PUSCH corresponding to the scheduling request SR on the physical uplink control channel PUCCH in the waiting state, or the PDCCH monitoring after the wireless communication device successfully receives the random access response RAR for the random access preamble not selected by the media access control MAC entity in the contention-based random access preamble, or the PDCCH during the activation time activated by an event other than the operation of the drx-on duration timer or the drx-inactivation timer, or the PDCCH when the wireless communication device monitors the PDCCH activated by the recovery search space Id PDCCH monitoring after the provided search space set; and whether to support applying SSSG switching after all data is successfully received, and wherein, if supported, the wireless communication device will report one of searchSpaceSwitchingwithDCI-r17 or searchSpaceSwitchingwithoutDCI-r17 to the wireless communication node; psSearchSpaceGroupMornitoring-r17, indicating whether the wireless communication device supports PDCCH monitoring according to the energy-saving PSSSSG; SearchSpaceGroup-r17, indicating whether the wireless communication device supports SSSG switching between two or more groups of SSS; or Numberofsearchspacegroup-r17, indicating the number of search space groups supported by the wireless communication device; or Numberofskippingduration-r17, indicating the number of skipping durations supported by the wireless communication device; or pdcchMonitoringSwitchingCapability-r17, indicating whether the wireless communication device supports the minimum delay for SSSG switching or PDCCH skipping, which is 25 symbols for subcarrier spacing μ=3, Here, N is an integer greater than 1.

26. The method of claim 1, wherein: The control information includes at least one of the following items: Downlink control information DCI indication information; A handover timer associated with a normal SSSG or a conventional SSSG; Power saving PS timer associated with PS SSSG; A scheduling request SR transmission on the physical uplink control channel PUCCH in a waiting state; A random access response RAR is received for a random access preamble that is not selected by the medium access control MAC entity among the contention-based random access preambles; RRC signalling parameter configuration related to SSSG switching or PDCCH skipping; or an adaptation mode for said PDCCH monitoring including SSSG switching and PDCCH skipping configured via RRC signaling, Here, N is an integer greater than 1.

27. The method according to claim 1 or 25, wherein: The wireless communication device is at least one of the following: a user equipment UE supporting a new radio NR unlicensed frequency band, a UE with reduced capabilities, a UE supporting an extended reality function, or a UE supporting an NR frequency band.

28. A method for control channel monitoring, comprising: The wireless communication node receives, from the wireless communication device, a plurality of capabilities of the wireless communication device; as well as The wireless communication node sends control information to the wireless communication device, Wherein, the wireless communication device is configured as: performing physical downlink control channel PDCCH monitoring using a set of search space sets SSS selected from at least one search space set group SSSG according to the control information, wherein the number of the at least one SSSG is N and N is an integer greater than or equal to 1, or each of the at least one SSSG includes a number of SSSs that is at least zero and at most equal to a maximum number of SSSs configured in the bandwidth part BWP; performing PDCCH skipping according to a skipping duration in response to at least one triggering event associated with the control information; and switching from PDCCH skipping to PDCCH monitoring using a default SSSG after the skipping duration ends; wherein the value of the skip duration is determined among M PDCCH skip duration values ​​in a list of candidate skip duration values ​​configured via higher layer signaling, and M is an integer greater than or equal to 1; and The wireless communication device is configured to: when the wireless communication device is performing PDCCH monitoring according to the PDCCH skipping, skip the PDCCH monitoring according to the PDCCH skipping, and perform PDCCH monitoring in response to a scheduling request SR waiting to be processed sent on a physical uplink control channel PUCCH.

29. A non-transitory computer readable medium storing instructions, wherein: When the instructions are executed by at least one processor, the at least one processor is prompted to perform the method according to any one of claims 1-28.

30. An apparatus for control channel monitoring, comprising: At least one processor configured to implement the method according to any one of claims 1-28.

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