Monitoring of control channels using dynamic downlink control information

Abstract

A system, method, apparatus, or computer-readable medium is proposed for monitoring a control channel using dynamic downlink control information. A wireless communication device can receive higher-layer configuration from a wireless communication node. The wireless communication device can receive downlink control information (DCI) from the wireless communication node, which is configured to trigger an upper limit for monitoring the physical downlink control channel (PDCCH). In some embodiments, the wireless communication device can decode at least one PDDCH in at least one time slot according to the upper limit.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communications, including but not limited to systems and methods for monitoring a control channel using dynamic downlink control information (DCI). Background Art

[0002] The third generation partnership project (3GPP), a standards organization, is currently in the process of specifying a new air interface called 5G New Radio (5G NR) and the next generation packet core network (NG-CN or NGC). 5G NR will have three main components: 5G access network (5G-AN), 5G core network (NGC) and user equipment (UE). To facilitate the implementation of different data services and requirements, the elements of 5GC (also known as network functions) have been simplified, and some of them are software-based, allowing them to be adjusted as needed. Summary of the invention

[0003] The example embodiments disclosed herein are intended to solve problems related to one or more difficulties existing in the prior art, as well as to provide additional features that will become apparent by reference to the following detailed description when combined with the accompanying drawings. According to various embodiments, example systems, methods, devices, and computer program products are disclosed herein. However, it should be understood that these embodiments are presented by way of example and not limitation, and it will be apparent to those of ordinary skill in the art who have read this disclosure that various modifications may be made to the disclosed embodiments while remaining within the scope of this disclosure.

[0004] At least one aspect relates to a system, method, apparatus, or computer-readable medium. A wireless communication device may receive a high-level configuration from a wireless communication node. The wireless communication device may receive downlink control information (DCI) from the wireless communication node, the downlink control information being configured to trigger an upper limit for physical downlink control channel (PDCCH) monitoring. In some embodiments, the wireless communication device may decode at least one PDDCH in at least one time slot according to the upper limit.

[0005] In some embodiments, an upper limit for PDCCH monitoring may include: a maximum number of PDCCH candidates to be monitored in one or more time slots (M-PDDCH) and / or a maximum number of non-overlapping control channel elements (CCEs) (M-CCEs) in one or more time slots. In some embodiments, the upper limit may include: a legacy limit; a non-legacy limit; having M-PDDCH set to 0; or having M-CCE set to 0. In some embodiments, triggering the upper limit includes indicating the upper limit.

[0006] In some embodiments, the DCI is configured to trigger the cap via at least one of the following: the DCI has a new or defined DCI format; the DCI is scrambled by a configured scheduling radio network temporary identifier (CS-RNTI); a PDCCH assigned by downlink (DL) semi-persistent scheduling (SPS) or a configured uplink (UL) grant type 2 PDCCH; the DCI is scrambled by a defined RNTI; the DCI is a DCI for scheduling a group of wireless communication devices including the wireless communication device; N bits in the DCI, where N is greater than or equal to 1; a field in the DCI; the DCI is a defined DCI; or reception of any DCI. In some embodiments, the N bits may indicate one or more legacy restrictions or one or more non-legacy restrictions.

[0007] In some embodiments, the wireless communication device is configured to be triggered by DCI for the upper limit according to a high-level configuration of a parameter or a parameter that enables a function associated with the upper limit. In some embodiments, the upper limit includes one or more values ​​of M-PDDCH or M-CCE for each subcarrier spacing (SCS); or a range of values ​​of M-PDDCH or M-CCE for each SCS.

[0008] In some embodiments, the wireless communication device may determine the starting position to apply the upper limit based on the time slot position or application delay configured by the DCI to trigger the upper limit. In some embodiments, the wireless communication device may decode at least one PDDCH after a time corresponding to the application delay, or after a time slot of the DCI where the application delay is equal to zero time units or does not exist. In some embodiments, the wireless communication device may determine the application delay based on at least one of the following: a parameter configured by a higher layer, a defined parameter, a subcarrier spacing parameter set of at least one of a physical downlink shared channel (PDSCH) or a PDCCH, or a BWP.

[0009] In some embodiments, the wireless communication device may decode at least one PDDCH in at least one time slot according to the upper limit within a time corresponding to the limit time. In some embodiments, the wireless communication device determines the limit time according to at least one of the following: a defined timer, a defined value, a high-layer configuration, an indication of a DCI, a defined time relative to one or more channels, or a discontinuous reception (DRX) configuration.

[0010] In some embodiments, the upper limit is triggered or indicated via at least one of: one or more states in a field of a DCI or a media access control control element (MAC CE); one or more bits of a DCI or a MAC CE; expiration of a limit time; end of a physical downlink shared channel (PDSCH) or an associated acknowledgement or negation (ACK / NACK); the DCI is a DCI for a group of wireless communication devices or a DCI for the wireless communication device; expiration of a timer; a defined DCI format; the DCI is scrambled by a configured scheduling radio network temporary identifier (CS-RNTI); a PDCCH allocated by downlink (DL) semi-persistent scheduling (SPS) or a configured uplink (UL) grant type 2 PDCCH; the DCI is scrambled by a defined radio network temporary identifier (RNTI); a defined aggregation level (AL); or a defined condition.

[0011] In some embodiments, the wireless communication device may determine an aggregation level (AL) and corresponding PDCCH candidates for a target search space (SS). In some embodiments, the wireless communication device may determine the target SS based on a higher layer configuration, an indication of a DCI, or a defined setting. In some embodiments, the wireless communication device may determine the AL and corresponding PDCCH candidates for the target SS from a plurality of selections based on: an indication in a DCI; a radio resource control (RRC) signaling; a baseline AL; a higher layer configuration; or a defined setting.

[0012] In some embodiments, determining the AL and corresponding PDCCH candidates for the target SS may include determining: one AL; at least two ALs; one AL and candidates corresponding to the one AL; or at least two ALs and candidates corresponding to the two ALs. In some embodiments, based on detecting DCI using an aggregation level (AL) set in a first time slot, the wireless communication device may determine an aggregation level for a second time slot using the AL set. In some embodiments, in response to the wireless communication device monitoring and decoding the first time slot using the number of DCI size types or the number of DCI formats, the wireless communication device may determine an aggregation level or an upper limit for the second time slot relative to the number of DCI size types or the number of DCI formats.

[0013] In some embodiments, the limit time can be defined according to the number of time slots, the number of milliseconds, the number of PDCCH monitoring opportunities, or the number of PDCCH monitoring opportunities for search space (SS), or according to a timer. In some embodiments, the upper limit can include: a limit on PDCCH skipping or PDCCH silencing, a limit on the search space, or a limit on the control resource set.

[0014] At least one aspect relates to a system, method, apparatus, or computer-readable medium. A wireless communication node may send a high-level configuration to a wireless communication device. The wireless communication node may send downlink control information (DCI) to the wireless communication device, the downlink control information being configured to trigger an upper limit for physical downlink control channel (PDCCH) monitoring. The wireless communication device may be caused to decode at least one PDCCH in at least one time slot according to the upper limit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Various example embodiments of the present solution are described in detail below with reference to the following figures or drawings. The drawings are provided for illustrative purposes only and merely depict 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 the sake of clarity and ease of illustration, these drawings are not necessarily drawn to scale.

[0016] Figure 1 An example cellular communication network is illustrated in accordance with an embodiment of the present disclosure, in which the techniques disclosed herein may be implemented;

[0017] Figure 2 A block diagram illustrating an example base station and user equipment according to some embodiments of the present disclosure; and

[0018] Figure 3 A flow chart is illustrated of an example method for monitoring a control channel using dynamic downlink control information in accordance with an illustrative embodiment. DETAILED DESCRIPTION

[0019] Various example embodiments of the present solution are described below with reference to the accompanying drawings to enable a person of ordinary skill in the art to make and use the present solution. It will be apparent to a person of ordinary skill in the art that, 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 approaches. 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 will understand that the methods and techniques disclosed herein present various steps or actions in a sample order, and unless otherwise expressly stated, the present solution is not limited to the specific order or hierarchy presented.

[0020] The following acronyms are used throughout this disclosure:

[0021]

[0022]

[0023]

[0024] 1. Mobile communication technology and environment

[0025] Figure 1 An example wireless communication network and / or system 100 is illustrated in accordance with an embodiment of the present disclosure, in which the techniques disclosed herein may be implemented. 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 may 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. In 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 within its allocated bandwidth to provide adequate radio coverage to its intended users.

[0026] For example, BS 102 may operate under the allocated channel transmission bandwidth to provide sufficient 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 be further divided into subframes 120 / 127, which may include data symbols 122 / 128. In the present disclosure, BS 102 and UE 104 are generally described herein as non-limiting examples of "communication nodes" that may practice the methods disclosed herein. According to various embodiments of the present solution, such communication nodes may be capable of wireless and / or wired communication.

[0027] Figure 2 A block diagram of an example wireless communication system 200 for transmitting and receiving wireless communication signals (e.g., OFDM / OFDMA signals) according to some embodiments of the present solution is illustrated. The system 200 may include components and elements configured to support known or conventional operating features, which need not be described in detail herein. In an illustrative embodiment, the system 200 may be used in a wireless communication environment (such as, for example, a wireless communication environment such as described above). Figure 1The present invention relates to a method for communicating (eg, transmitting and receiving) data symbols in a wireless communication environment 100 of the present invention.

[0028] 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"). BS 202 includes: BS (base station) transceiver module 210, BS antenna 212, BS processor module 214, BS memory module 216 and network communication module 218, each module is coupled to and interconnected with each other via data communication bus 220 as needed. UE 204 includes: UE (user equipment) transceiver module 230, UE antenna 232, UE memory module 234 and UE processor module 236, each module is coupled to and interconnected with each other via data communication bus 240 as needed. BS 202 communicates with UE 204 via communication channel 250, which can be any wireless channel or other medium suitable for data transmission as described herein.

[0029] As will be appreciated by those skilled in the art, the system 200 may also include Figure 2 Any 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 this interchangeability and compatibility of hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps are generally described in terms of their functionality. Whether this functionality is implemented as hardware, firmware, or software can depend on specific applications and design constraints imposed on the entire system. A technician familiar with the concepts described herein can implement this functionality in a suitable manner for each specific application, but this implementation decision should not be interpreted as limiting the scope of the present disclosure.

[0030] According to some embodiments, the UE transceiver 230 may be referred to herein as an "uplink" transceiver 230, which includes a radio frequency (RF) transmitter and an RF receiver, each including circuits coupled to an antenna 232. A duplex switch (not shown) may alternately couple the uplink transmitter or receiver to the uplink antenna in a time duplex manner. Similarly, according to some embodiments, the BS transceiver 210 may be referred to herein as a "downlink" transceiver 210, which includes a radio frequency (RF) transmitter and an RF receiver, each including circuits coupled to an antenna 212. The downlink duplex switch may alternately 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 such that while the downlink transmitter is coupled to the downlink antenna 212, the uplink receiver circuit is coupled to the uplink antenna 232 to receive transmissions over the wireless transmission link 250. Conversely, the operation of the two transceiver modules 210 and 230 may be coordinated in time such that while the uplink transmitter is coupled to the uplink antenna 232, the downlink receiver is coupled to the downlink antenna 212 to receive transmissions over the wireless transmission link 250. In some embodiments, there is tight time synchronization with minimal guard times between changes in duplex direction.

[0031] 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 capable of supporting a specific wireless communication protocol and modulation scheme. In some illustrative 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 specific standards and related protocols in application. More specifically, 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.

[0032] According to various embodiments, BS 202 may be, for example, an evolved Node B (eNB), a serving eNB, a target eNB, a femtocell or a microcell. According to some embodiments, UE 204 may be embodied in various types of user equipment, such as a mobile phone, a smart phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, a wearable computing device, 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, or the like. The processor may also be implemented as a combination of computing devices, for example, a combination of a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors coordinated with a digital signal processor core, or any other such configuration.

[0033] In addition, the steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be directly embodied in hardware, firmware, software modules executed by the processor modules 214 and 236, respectively, or 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 to be executed by the processor modules 214 and 236, respectively.

[0034] The network communication module 218 generally represents the hardware, software, firmware, processing logic and / or other components of the base station 202, which enables two-way communication between the BS transceiver 210 and other network components and the communication node configured to communicate with the base station 202. For example, the network communication module 218 can be configured to support Internet or WiMAX traffic. In a typical deployment, without limitation, the network communication module 218 provides an 802.3 Ethernet interface so that the base station transceiver 210 can communicate with a computer network based on a conventional Ethernet. 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)). As used herein with respect to a specified operation or function, the term "configured for...", "configured to..." and its word form changes refer to a device, component, circuit, structure, machine, signal, etc. that is physically constructed, programmed, formatted and / or arranged to perform a specified operation or function.

[0035] The open systems interconnection (OSI) model (referred to herein as the "open systems interconnection model") is a concept and logical layout that defines network communications used by systems (e.g., wireless communication devices, wireless communication nodes) that are open to interconnection and communication with other systems. The model is decomposed into seven subcomponents or layers, each of which represents a conceptual set of services provided to the layers above and below it. The OSI model also defines a logical network and effectively describes computer packet transmissions performed 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 convergence 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 one of a non-access stratum (NAS) layer or an Internet protocol (IP) layer, and the seventh layer is another layer.

[0036] 2. Systems and methods for monitoring control channels using dynamic downlink control information (DCI) In a 5G new air access technology (NR) communication system, a user equipment (UE) (e.g., UE 104 or 204 as described above) that decodes a PDCCH may be limited by the maximum number of PDCCH candidates to be monitored and the maximum number of non-overlapping control channel elements (CCEs). For REDCAP (reduced capability) UEs, lower power saving and UE complexity can be used. Therefore, it is an effective method to achieve more power saving and less complexity by limiting the number of CCEs and PDCCH candidates. Simulation results show that power saving techniques can reduce UE power consumption compared to traditional PDCCH candidate restrictions. This article presents a process for saving power and reducing complexity by reducing the number of CCEs and PDCCH candidates. In particular, a dynamic downlink control information (DCI) indication or trigger for reducing the number of blind decoded CCEs can be implemented.

[0037] The user equipment (UE) should receive uplink scheduling grant information before sending the physical uplink shared channel (PUSCH) and the downlink scheduling assignment information for receiving the physical downlink shared channel (PDSCH). This information can be included in the downlink control information (DCI) and can be sent to the UE by the base station in different DCI formats on the PDCCH channel. Therefore, the UE should monitor the PDCCH first. When the UE decodes the PDCCH, the number of PDCCH candidates monitored per time slot in the BWP and the number of non-overlapping CCEs per time slot in the BWP can be limited as follows.

[0038] Table 10.1-2 provides the maximum number of PDCCH candidates to be monitored per time slot for a UE in a DL bandwidth part (BWP) with subcarrier spacing (SCS) configuration μ for single serving cell operation.

[0039] Table 10.1-2: Maximum number of PDCCH candidates monitored per slot for DL ​​BWP with SCS configuration μ∈{0,1,2,3} for a single serving cell

[0040]

[0041]

[0042] Table 10.1-3 provides the maximum number of non-overlapping CCEs for DL ​​BWP (the UE is expected to monitor the corresponding PDCCH candidates in each time slot) with SCS configuration μ for single serving cell operation. If the candidates correspond to different CORESET indices or different first symbols, the CCEs for the PDCCH candidates may be identified as non-overlapping for receiving the respective PDCCH candidates.

[0043] Table 10.1-3: Maximum number of non-overlapping CCEs per slot for DL ​​BWP with SCS configuration μ∈{0,1,2,3} for a single serving cell

[0044]

[0045] Maximum number of PDCCH candidates and the maximum number of non-overlapping CCEs Can be regarded as a traditional restriction. The redefined table or value can be regarded as a new restriction. If the new restriction is set to 0, the value can indicate that the UE is not to monitor or decode the target time slot (also referred to as PDCCH skipping in this article). Therefore, the restriction may include PDCCH skipping. When the maximum number of CCEs or the maximum number of PDCCH candidates is set to 0, the number of CCEs or PDCCH candidates and PDCCH skipping can be regarded as special cases. In addition, the new restriction may include traditional restrictions.

[0046] In addition, the operation of UE monitoring PDCCH can be performed on the control resource set for the search space set and the PDCCH monitoring opportunity. The relevant monitoring parameters of PDCCH can be included in the SearchSpace field of the radio resource control (RRC) signaling. The SearchSpaceId and controlResourceSetId information elements (IE) can indicate the search space set index and the control resource set (CORESET) of the search space SearchSpace applicable to PDCCH monitoring. The searchSpaceType IE in the SearchSpace field can indicate the search space type of the PDCCH that the UE is expected to monitor. The common search space and the UE-specific search space can correspond to different DCI formats to be detected. The common search space can be type 3-PDCCHCSS. The aggregation level and the corresponding candidates can be configured by nrofCandidates in SearchSpace.

[0047] In order to save power and reduce UE complexity, a reduction in the number of CCEs or PDCCH candidates may be performed. The UE behavior may be described as follows. The UE may receive a DCI. The DCI may trigger a new restriction in at least one time slot. After applying a delay (denoted as X), the UE may monitor the time slots within the restricted time (denoted as Y) using the new restriction. After Y, the UE may receive a DCI indicating whether the UE is to use the traditional restriction or the new restriction, or whether the UE is to receive a predefined DCI format. In this way, the UE may monitor the time slots using the traditional restriction or the new restriction.

[0048] Using a DCI indication or a special DCI trigger, the UE may start monitoring Y with a new restriction (e.g., in time slots or milliseconds). The new restriction, the restriction time Y, the application delay X, or the target time slot within Y may be configured by RRC, DCI, or via a default setting. In addition, a specific AL and corresponding candidates may be configured for the UE. A triggering method, a target SS, or a method to fall back to the legacy restriction may be specified. A. Downlink Control Information (DCI) for Indicating or Triggering a New Restriction

[0049] 1. Trigger method

[0050] After configuring the parameters in the higher layers, or after enabling the functions corresponding to the reduced number of PDCCH candidates or CCEs, any triggering method discussed below may be performed.

[0051] In some embodiments, a new or specific DCI format may be used to indicate or trigger a new restriction. When the UE detects the DCI format, the UE may monitor the target time slot using the new restriction according to the DCI indication, high-layer configuration or default rules.

[0052] In some embodiments, a new or specific radio network temporary identifier (RNTI) may be used to trigger the UE to use the new restriction. If the UE detects a DCI scrambled with the RNTI, the UE may monitor the target timeslot using the new restriction according to the DCI indication, higher layer configuration or default rules.

[0053] In some embodiments, a UE group DCI (scrambled with or without a new RNTI) may be used to indicate new restrictions for a target group of UEs. When a UE (belonging to the group) detects the DCI, the UE may monitor the target timeslots using the new restrictions according to the DCI indication, higher layer configuration, or default rules.

[0054] In some embodiments, N bits (forming a field) in the DCI may be used to indicate whether new restrictions or traditional restrictions are used. When the UE detects this field in the DCI, the UE may monitor the target time slot using the new restrictions or the traditional restrictions according to the indication of the DCI. The number of bits may be greater than or equal to (N≥1).

[0055] In some embodiments, new or specific DCI may trigger new restrictions, such as semi-persistent scheduling, downlink (SPS-DL) DCI or downlink (DL) semi-persistent scheduling (SPS) allocated PDCCH, configuration grant uplink (CG-UL) DCI or configured uplink (UL) grant type 2 PDCCH, or slot format indication (SFI) DCI. If the UE detects a special DCI, the UE may monitor the target time slot using the new restrictions according to the DCI indication, high-level configuration or default rules.

[0056] In some embodiments, any DCI may trigger the use of new restrictions. When the UE receives a DCI, the new restrictions may be triggered.

[0057] 2. Indication of restrictions via RRC, DCI or default settings

[0058] The conventional restriction table may be considered as one restriction set for different subcarrier spacings (SCS). In contrast, there may be N restriction sets. The N number of restriction sets (or N tables each having 1 value; or one table having N values) for the number of PDCCH candidates or CCEs may be indicated by DCI, predefined, or configured by a higher layer (e.g., RRC).

[0059] The high-level indication may include a field indicating or specifying a particular restriction set (to be used or recommended for use by the UE). Each restriction set may have an identifier or number of the restriction (e.g., which may or may not be in the field). Another field may indicate a list of identifier numbers of restrictions (e.g., recommended for use by the UE). The high-level indication may include using [log2(N)] bits to indicate N restriction sets.

[0060] The DCI indication may include a field for indicating N restriction sets. The N restriction sets may be predefined or may be from a list. Table 1 below shows an example of N restriction sets.

[0061] Table 1

[0062] SCS (Subcarrier Spacing) <![CDATA[X1,]]> <![CDATA[X2,.....]]> ... <![CDATA[X N ]]> u＝0 <![CDATA[M1]]> <![CDATA[M2]]> ... <![CDATA[M N ]]> u＝1 <![CDATA[H1]]> <![CDATA[H2]]> ... <![CDATA[H N ]]> u＝2 <![CDATA[P1]]> <![CDATA[P2]]> ... <![CDATA[P N ]]> u＝3 <![CDATA[Q1]]> <![CDATA[Q2]]> ... <![CDATA[Q N ]]>

[0063] As noted above, for SCS(u value), X i This may include values ​​that identify specific limit sets from traditional limits. For SCS, X i A value equal to 0 may be included (eg, no UE monitoring of PDCCH).

[0064] In addition, X can be an integer in the range [X1~X N ] as shown in Table 2.

[0065] Table 2

[0066] SCS <![CDATA[X1~X N ]]> u＝0 <![CDATA[M1~M N ]]> u＝1 <![CDATA[H1~H N ]]> u＝2 <![CDATA[P1~P N ]]> u＝3 <![CDATA[Q1~Q N ]]>

[0067] Similarly, for SCS, X i Values ​​from traditional limits can be included. In addition, for SCS, X i A value equal to 0 may be included (eg, no monitoring of the UE). If N=2 (2 restricted sets=1 legacy set, 1 new set), a specific example is shown below:

[0068] Example 1-1: n is a coefficient for 2 restricted sets of PDCCH candidates

[0069]

[0070] Example 1-2: n is a coefficient for 2 sets of limits on the number of CCEs

[0071]

[0072]

[0073] In the above examples, n may be a predefined integer, or may be configured or obtained by a higher layer configuration (eg, RRC).

[0074] Example 1-3: For a PDCCH candidate, each new restriction set is set to 0. (In some cases, only some or all of the new restriction sets may be set to 0):

[0075]

[0076] Example 1-4: For the number of CCEs, each new limit set is set to 0. In some cases, only some of the new limit sets may be set to 0:

[0077]

[0078] If the restricted set is set to 0, the UE may give up monitoring the time slots within Y. In addition, if a value in the restricted set for SCS is set to 0, the UE may give up monitoring the time slots within Y when configured with SCS.

[0079] 3. Application Delay (X)

[0080] In some embodiments, if the DCI triggering condition is met, the UE may start using the new restriction (e.g., immediately), which means that there is no need to configure X=0 or parameter X. Parameter X may not exist or may not be defined. In some embodiments, if the DCI triggering condition is met, the UE may start using the new restriction after applying a delay of X>0 (time slots or ms). The value X may be predefined or configured by higher layer signaling (e.g., RRC) and may be defined, for example, as follows:

[0081] or

[0082] Where n is the time slot (or time of the time slot) with scheduled DCI; X0 is the parameter set based on PDSCH; μ PDSCH and μ PDCCH are the subcarrier spacing configurations for PDSCH and PDCCH respectively; and Z u It is a fixed value or a configured value according to different SCS.

[0083] X0 / Z u Can be predefined or configured by high-level configuration as follows:

[0084] SCS <![CDATA[X0 / Z u ]]> u＝0 M u＝1 N u＝2 P u＝3 Q

[0085] The application delay X may be configured in SPS-DL (e.g., using SPS-Config as an RRC parameter), CG-UL (ConfiguredGrantConfig, which is a high-layer parameter such as RRC), or may be configured per bandwidth part (BWP). In each BWP configuration, each configuration may be valid in the corresponding BWP. BWP switching may refer to a change in configuration (when changing to a different BWP).

[0086] 4. Time limit (Y)

[0087] During the restricted time Y, the UE may monitor the time slot using the new restriction. The UE may define Y using any of the procedures discussed herein. In some embodiments, the restricted time Y may be defined as a timer. In some embodiments, the restricted time Y may be set to a default value (e.g., Y=8 time slots / ms). In some embodiments, the restricted time Y may be a configuration value configured by a higher layer. For example, the value may be configured in SPS-Config / ConfiguredGrantConfig. The value may also be configured per BWP or per search space (SS).

[0088] In some embodiments, the restricted time Y may be indicated by DCI. The value set of Y may be predefined or configured by a list in a high-level parameter. In some embodiments, the restricted time Y may be defined as the time domain time between the PDCCH end slot and the corresponding PDSCH / PUSCH start slot. This value may be equal to, for example, K0 / K2, including or excluding the application delay X.

[0089] In some embodiments, the restricted time Y may be defined as the time domain time between the PDSCH start (or end) time slot and the confirmation (e.g., ACK or NACK) feedback start (or end) time slot. This value may exclude the application of delay X. In some embodiments, the restricted time Y may be defined as the time domain time between the PDSCH start (or end) time slot and the confirmation (e.g., ACK / NACK) feedback start (or end) time slot. This value may exclude the application of delay X.

[0090] In some embodiments, the restricted time Y can be configured on a per-BWP basis. Each configuration can be valid in a corresponding BWP. BWP switching can refer to a change in configuration. In some embodiments, the restricted time Y can be configured on a per-SS basis. Each configuration can be valid in a corresponding search space. Different SSs can indicate changes in configuration. For example, a restricted time timer can be defined with possible Y values ​​{2, 4, 8, 16}, and the DCI can use 2 bits to indicate a value of 4. The UE can then use a new restriction with Y=4 slots / ms. If the timer expires (e.g., exceeds Y=4 slots / ms), the UE will fall back to the traditional restriction.

[0091] 5. Fallback to traditional restrictions

[0092] In some embodiments, one or more states in a field of a DCI or a media access control element (MAC CE), or one or more bits of a DCI or a MAC CE, may be used. For example, an N-bit indication may be used. One of the 2^N states in an N-bit or N-bit field in a DCI may be used to indicate using a traditional restriction or a new restriction. When the UE receives a state indicating a new restriction, the UE may monitor a time slot within Y using the new restriction. When the UE receives a state indicating a traditional restriction, the UE may monitor a time slot using a traditional restriction.

[0093] In some embodiments, the triggering or indication of the legacy restrictions (e.g., for a fallback method) may be via the expiration of a timer. In some embodiments, the triggering or indication of the legacy restrictions may be via a defined DCI format. In some embodiments, the triggering or indication of the legacy restrictions may be via at least a portion of a DCI scrambled by a CS-RNTI or a defined RNTI. In some embodiments, the triggering or indication of the legacy restrictions may be via a defined AL. In some embodiments, the triggering or indication may be via a defined condition.

[0094] In some embodiments, when a timer with a limit time Y expires, the UE may fall back to monitoring the time slot using traditional restrictions. In some embodiments, when the UE receives a predefined DCI format (e.g., a deactivated SPS-DL or CG-UL DCI), the UE may fall back to monitoring the time slot using traditional restrictions. For example, when the UE receives a deactivated SPS-DL DCI, the UE may fall back to monitoring the time slot using traditional restrictions. In some embodiments, when the PDSCH ends or the ACK / NACK ends, the UE may fall back to monitoring the time slot using traditional restrictions.

[0095] In some embodiments, the DCI that activates the new restriction may be a UE group DCI, and the deactivated DCI may be a UE-specific DCI or a timer expiration. In some embodiments, the DCI that activates the new restriction may be a UE group DCI, and the deactivated DCI may be a UE group DCI or a timer expiration. In some embodiments, the DCI that activates the new restriction may be a UE-specific DCI, and the deactivated DCI may be a UE-specific DCI or a timer expiration. The UE group DCI may refer to a UE group common CSS (Type 3 CSS). The SPS-DL DCI may indicate that the DCI scrambled with the CS-RNTI is used for SPS scheduling. This definition may be similar to the CG-UL DCI.

[0096] B. Target time slot within the restricted time (Y)

[0097] All (or some) opportunity slots may be monitored with the new restrictions within the restriction time Y. For example, some opportunity slots may be selected as target slots with new restrictions, while other slots may be monitored with traditional restrictions.

[0098] 1. Cycle through every N opportunity slots

[0099] N may be configured by higher layers and may determine the number of bits in the DCI. For example, N may be configured by higher layers. A 2-bit field in the DCI may be used to indicate whether each time slot is a target time slot for using the new restriction. The DCI may be UE-specific, where a DCI may only be used for a specific UE.

[0100] In addition, the DCI may be a UE group DCI. The DCI may be used to indicate multiple UEs. The DCI structure may be similar to: {block number 1, block number 2, ..., block number N}. Each block may have a field for each UE in the UE group. The starting position of the block may be determined by a parameter provided by a high-level configuration to the UE configured with the block.

[0101] 2. Predefined limits for every N opportunity slots

[0102] According to the rule, the UE may apply an upper limit to the first time slot and another set of upper limits to the second time slot. Each opportunity may have a corresponding limit and cycle every n opportunity time slots. The specific limits for the n opportunity time slots are predefined (e.g., via a rule). For example, the rule may be as follows: (1) The first time slot shall correspond to the limit X1, and the second time slot shall correspond to the limit X2. The nth time slot opportunity shall correspond to the condition that X1≤X2≤...≤X n X n ; (2) The first time slot must correspond to the restriction X1, the second time slot must correspond to the restriction X2, and the nth time slot must correspond to the condition X1≥X2≥...≥X n X n ; (3)X 2i ≤X 2i+1 or X 2i ≥X 2i+1 , where i is a natural number; and (4) other rules redefined or configured by higher layers.

[0103] 3. Definition of the target time slot set selected by DCI indication

[0104] According to the indication of DCI, the UE can select a rule from multiple rules. In some embodiments, when there are predefined M rules, DCI can be used to utilize bits to indicate one of the M rules. In some embodiments, when there are M rules configured by higher layers, DCI can be used to utilize bits to indicate one of the M restrictions.

[0105] Which rules to select may be based on a DCI subject to one or more constraints. These constraints may include a cycle of every N opportunity slots configured by a higher layer. These constraints may include predefined or configured constraints (e.g., rule 1, rule 2, rule 3, etc.) for every n opportunity slots.

[0106] C. Indication of aggregation level (AL) and corresponding candidate DCI

[0107] Searchspace IE can configure AL and PDDCH candidates for SS. Since AL should be adapted to the RRC cycle, more types of aggregation levels can be configured, resulting in more PDCCH candidates. However, if the channel condition is identified as static over a period of time, fewer PDCCH candidates can be used to save power and UE processing time.

[0108] The DCI may indicate the AL and candidates for the target SS. When the UE monitors the timeslots in the target SS, the UE may decode the PDCCH using the AL and candidates within the restricted time Y. After the restricted time Y, or when the UE receives an indication to fall back to the traditional restriction, the UE may fall back to monitoring the timeslots using the AL and candidates configured by the RRC.

[0109] 1. Target Search Space

[0110] In some embodiments, the target SS may correspond to the SS corresponding to the DCI indicating the AL and the candidate. This may mean that the UE is to monitor a single specific SS using the indicated AL and the candidate. In some embodiments, the target SS may correspond to the USS. This may mean that the UE is to monitor the USS using the indicated AL and the candidate. In some embodiments, the target SS may include the USS or the UE group CSS. In some embodiments, the target SS may be configured by a higher layer. For example, 1 bit in the searchspace IE may indicate whether it is the target SS. In addition, the X bits in the parameter in the RRC indicate which SS is selected as the target SS.

[0111] In some embodiments, the target SS may be indicated by a DCI. The DCI may indicate one or more SSs from a USS, a group common CSS, or a cell specific CSS, etc. For example, the target SS set may include all USSs. X USSs may be configured for the UE. There may be X bits in the DCI in a bitmap indicating which SSs are the target SSs. In another example, the target SS set may be all USSs, and one of the total number of X USSs may be the target SS. There may be bits indicate which SSs are selected.

[0112] 2. Trigger

[0113] If the number of total SSs is greater than or equal to N, or if the number of USSs is greater than or equal to N, or the number of SSs configured by the searchspcae IE is greater than or equal to N, or the number of target SSs is greater than or equal to N, this field may indicate that the AL or corresponding candidate in the DCI exists.

[0114] If there are X types of aggregation levels for an SS configuration or for multiple SS configurations where X≥X0 (where X0 is a threshold), this field may indicate that an AL or a corresponding candidate exists in the DCI. If a higher layer configures a specific parameter, or if a parameter provided by a higher layer indicates that the function is enabled, this field may indicate that an AL or a corresponding candidate exists in the DCI.

[0115] The trigger method and application delay method described above may also be applicable. The limit time Y and target time slot method described above may also be applicable.

[0116] 3. Indication of AL and candidate DCI from existing configuration from RRC parameter searchspace IE

[0117] If there are X types of aggregation levels for a SS configuration or multiple SS configurations, then or bits to indicate which AL (1 type of AL) and corresponding candidates can be selected using DCI or RRC signaling. For example:

[0118]

[0119] 011 AL=8 100 AL=16 101 AL and candidates configured by RRC 110 Spare 111 Spare

[0120] If there are X types of aggregation levels for an SS configuration or multiple SS configurations, N bits may be used to indicate which AL (1 or more types of AL) and candidates may be selected.

[0121] If N is configured, there can be a maximum of 2^N states. For example, N=3 and there are 4 types of ALs, including {x0, x1, x2, x3} (AL set):

[0122] state Indicated AL 000 AL=x0 001 AL=x1 010 AL=x2 011 AL=x3 100 AL=x0,x1 101 AL=x1,x2 110 AL=x2,x3 111 The entire AL collection

[0123] For example, N=3 and there are 5 types of ALs, including {x0, x1, x2, x3, x4} (AL set):

[0124]

[0125]

[0126] For example, N=3 and there are 3 types of ALs, including {x0, x1, x2} (AL set):

[0127] state Indicated AL 000 AL=x0 001 AL=x1 010 AL=x2 011 AL=x0,x1 100 AL=x1,x2 101 AL=x0,x2 110 Spare 111 The entire AL collection

[0128] For example, N=2 and there are 3 types of ALs, including {x0, x1, x2} (AL set):

[0129] state Indicated AL 00 AL=x0 01 AL=x1 10 AL=x2 11 The entire AL collection

[0130] For example, N = 2 and there are 2 types of ALs, including {x0, x1} (AL set):

[0131] state Indicated AL 00 AL=x0 01 AL=x1 10 Spare 11 The entire AL collection

[0132] When x i-1 < x i , there may be rules to consider: (1) Smaller ALs should have higher priority; (2) Fewer types of ALs should have higher priority; and (3) "Continuous" multiple ALs (x i-1 , x i ) should have higher priority than "discontinuous" (x i-1 , x i+1 ).

[0133] The AL set can be divided into x groups, and bits can be used to indicate one of the groups. In some embodiments, a bitmap or resource indicator value (RIV) method can be used to divide the AL set into individual groups. With a bitmap, the AL set includes n types of ALs. The bitmap of n bits is to indicate which type of AL is selected into a group. With the RIV method, the process can be defined as follows:

[0134] if (L - 1) ≤ n then

[0135] SLIV = n·(L – 1) + S

[0136] else

[0137] SLIV = n·(n - L + 1) + (n - 1 – S)

[0138] where 0 < L ≤ 14 - S, S refers to the starting AL, L refers to the multiple types of ALs included in a group, the starting and length indicator value (SLIV) refers to the indicator for a group, and n0 is equal to n / 2 or or

[0139] The baseline AL can be defined as follows. In some embodiments, the baseline AL can be based on an average. The average AL configured by an SS (e.g., USS, USS and UE group CSS, one SS, all SSs or predefined, configured SSs or target SSs) can be assumed to be the baseline AL (BAL). The AL set can be {M1, M2..., M J}, and BAL M j can be determined to satisfy Minimum value. If present, use M i If two different solutions are provided, the larger or smaller one can be used for BAL.

[0140] In some embodiments, the baseline AL may be used based on the modulus, median, mode, or variance. The modulus, median, mode, or variance of the AL configured by the SS (e.g., USS, USS and UE group SS, one SS, all SSs, or predefined or configured SSs, or target SS) may be used to calculate the BAL. This operation may be similar to the average.

[0141] AL can be defined based on BAL, where DCI is offset by N bits. For example, N=2, BAL is set to M i .

[0142]

[0143]

[0144] AL sets can be defined for occasion slot cycles. AL sets can be defined for J occasion slots, such as {M1, M2..., M J}. The UE can monitor the (1+J*n)th time slot when AL=M1, and can monitor the (1+J*n)th time slot when AL=M i The UE may monitor the (i+J*n)th time slot when AL=M1, and monitor the (1+J*n+A)th time slot when AL=M2. i In this case, the (i+J*n+A)th time slot is monitored.

[0145] Multiple AL sets may be predefined or RRC configured or configured by a higher layer; one of the sets may be indicated or selected by DCI, RRC parameters, higher layer configuration or default rules.

[0146] 4. The process of falling back to traditional monitoring

[0147] In some embodiments, 1 bit in the DCI may be used to indicate whether to fall back to traditional monitoring or restriction. In some embodiments, 1 state in N bits may be used to indicate that the UE is to fall back to traditional monitoring or restriction. After a restriction time Y or after a timer expires, the UE may fall back to traditional monitoring or restriction.

[0148] Regarding UE behavior, it may not be desirable for a UE to receive DCI on a slot that cannot distinguish between 2 or more search spaces. In some embodiments, it may not be desirable for a UE to receive multiple DCIs indicating different ALs and candidates on an opportunity slot. When a UE receives a DCI indicating AL or candidate (restricted), it may not be desirable for the UE to receive a DCI that changes the AL and candidate within the application delay X.

[0149] D. Detection of downlink control information (DCI) with AL set to X and DCI format Z in the corresponding SS

[0150] Regarding AL, when the UE detects a target SS with AL set X = {M1, M2..., M J}, the UE may (or may be expected to) monitor the time slot with AL=X. i ={M1,M2...,M J After detecting DCI with AL set X within}, the UE can monitor DCI with AL set X. i ={M1,M2...,M J In other words, the UE may (or may be expected to) monitor the next PDCCH opportunity slot with AL X i-1 ={M1,M2...,M J} PDCCH opportunity slot i (e.g., within the target slot, target SS, restricted time Y, or other). Set X i-1 ={M1,M2...,M J} may be the AL set when the UE is to monitor PDCCH opportunity slot i-1 and detect DCI therewith. The candidates may be the same for both ALs.

[0151] Regarding the number of DCI size types or the number of DCI formats, after the UE decodes the PDCCH opportunity slot using the triggered DCI and the UE obtains the number x of DCI size types (or DCI formats) in the slot, the UE may be expected to monitor the slot within the restricted time Y using the restriction associated with x. For example, when x belongs to 1 to the threshold x0, the new restriction or restriction X0 may be used. Otherwise, the corresponding conventional restriction may be used. When x belongs to the interval x i-1 +1~x i When you can use new restrictions or restrictions X i .

[0152] The restriction time Y may be defined based on a time slot, a number of milliseconds, a timer, the number of PDCCH monitoring opportunities, or the number of PDCCH monitoring opportunities for an SS, etc. In addition, in addition to the number of PDCCH candidates and CCEs, these restrictions may also include PDCCH skipping (or PDCCH silencing), limited search space, or limited core set, etc.

[0153] E. Semi-persistent scheduling (SPS) verification

[0154] When the multi-transport block (TB) scheduling function is configured or enabled, the special fields for SPS activation or release M-PDCCH verification can be as follows. The redundancy version in the scheduling TB for the unicast field can be set to 0 (e.g., '00'). For DCI format 6-0A, the hybrid automatic repeat request (HARQ) process number in the scheduling TB for the unicast field can be set to '000'. For DCI format 6-1A in frequency division duplex (FDD), the HARQ process number in the scheduling TB for the unicast field can be set to '000'. For DCI format 6-1A in time division duplex (TDD), the HARQ process number in the scheduling TB for the unicast field can be set to '0000' or '000'. For example:

[0155] Table 9.2-1D: Special fields for SPS activated MPDCCH verification if multi-TB-DL-config or multi-TB-UL-config is configured:

[0156] DCI Format 6-0A DCI Format 6-1A HARQ process number in the scheduling TB of the unicast field Set to '000' Set to '000' Redundancy version in scheduling TB for unicast fields Set to '00' Set to '00' TPC command for scheduling PUSCH Set to '00' N / A TPC command for scheduling PUCCH N / A Set to '00'

[0157] Table 9.2-1E: Special fields for SPS release MPDCCH verification if multi-TB-DL-config or multi-TB-UL-config is configured:

[0158]

[0159]

[0160] The Multi-TB HARQ Process Group field may be set to '0'. If present, the Multi-TB HARQ Process Group field may be set to '0'.

[0161] F. Method for monitoring a control channel using dynamic downlink control information

[0162] Now refer to Figure 3, depicts a method 300 for monitoring a control channel using dynamic downlink control information (DCI). The method 300 may be implemented or performed using one or more components (such as, BS 102 or UE 104) described in detail herein. In brief, a wireless communication device may receive a high-level configuration (305). The wireless communication device may receive downlink control information (310). The wireless communication device may determine whether to use traditional restrictions or non-traditional restrictions (315). When it is determined that traditional restrictions are to be used, the wireless communication device may apply non-traditional restrictions (320). Conversely, when it is determined that non-traditional restrictions are to be used, the wireless communication device may apply traditional restrictions (325). The wireless communication device may decode the control channel using non-traditional restrictions (330). The wireless communication device may determine whether a fallback condition is met (335). The wireless communication device may decode the control channel using traditional restrictions (340).

[0163] In more detail, a wireless communication device (e.g., UE 104) may retrieve, identify, or receive a high-level configuration (305) from a wireless communication node (e.g., BS 102). The wireless communication node may provide, send, or transmit the high-level configuration to the wireless communication device. The high-level configuration may include one or more parameters, such as: radio resource control (RRC) parameters, discontinuous reception (DRX) parameters, and bandwidth part (BWP) related parameters, etc. The parameters of the high-level configuration may specify, identify, or otherwise define a control channel (e.g., physical downlink control channel (PDCCH)) candidate for each time slot and a control channel element (CCE) number limit for each time slot. Each time slot may correspond to or include resources (e.g., time and frequency) for a control channel. The control channel candidate may identify or include a set of control channels in a single cell to be monitored by the wireless communication device. The CCE number limit may define or specify the number of non-overlapping elements in a single cell in the control channel.

[0164] The wireless communication device may retrieve, identify, or otherwise receive downlink control information (DCI) (310) from a wireless communication node. The wireless communication node may provide, send, or transmit the DCI to the wireless communication device. The DCI may be configured to trigger or indicate an upper limit for monitoring a control channel (e.g., PDCCH). The upper limit may relate to the number of PDDCHs and the number of control channel elements in one or more time slots. In some embodiments, the upper limit for PDCCH monitoring may identify or include a maximum number of PDCCH candidates to be monitored in one or more time slots (M-PDDCH). In some embodiments, the upper limit for PDCCH monitoring may identify or include a maximum number of non-overlapping control channel elements (CCE) in one or more time slots. In some embodiments, the upper limit may identify or include a traditional restriction or a non-traditional restriction. In some embodiments, the upper limit may set the M-PDCCH to empty (e.g., 0). In some embodiments, the upper limit may set the M-CCE to empty (e.g., 0). In some embodiments, the upper limit may include a value for the M-PDCCH or M-CCE for each subcarrier spacing (SCS). In some embodiments, the upper limit may include a range of values ​​for the M-PDCCH or M-CCE for each SCS. In some embodiments, the upper limit may include one or more constraints on PDCCH monitoring, such as restrictions on PDCCH skipping or PDCCH silencing, restrictions on search spaces, and restrictions on control resource sets (CORESETs).

[0165] The wireless communication device may be triggered by DCI to use a non-traditional (or traditional) value for an upper limit. The DCI may be configured to use any number of conditions or factors to trigger or indicate an upper limit. In some embodiments, the DCI may identify or have a new or defined DCI format. The DCI may be based on various formats (e.g., 1-x, 0-x, or 2-x), and one or more of the formats may be used to trigger or indicate an upper limit for PDCCH monitoring. In some embodiments, at least a portion of the DCI may be scrambled by a configuration scheduling radio network temporary identifier (CS-RNTI) or a defined RNTI. A portion of the DCI may correspond to a cyclic redundancy check portion and may be scrambled to trigger or indicate an upper limit. The RNTI may be defined or newly defined and may correspond to a wireless communication device. In some embodiments, the configuration of the DCI trigger or indication upper limit may be via a PDCCH, such as a PDCCH assigned by a downlink (DL) semi-persistent scheduling (SPS) or an uplink (UL) grant type 2 PDCCH, etc. In some embodiments, the DCI may correspond to, include, or be a DCI scheduled by a group of wireless communication devices including the wireless communication device. A DCI group may be identified for a target group of wireless communication devices using or not using RNTI.

[0166] In some embodiments, the configuration of the DCI trigger or indication upper limit can be via N bits in the DCI (e.g., where N≥1). The N bits can indicate the use of one or more traditional restrictions or one or more non-traditional restrictions. The N bits can form a field in the DCI to indicate the use of traditional or non-traditional restrictions. In some embodiments, the configuration of the DCI trigger or indication upper limit can be via a field in the DCI. The field can indicate the use of traditional or non-traditional restrictions. In some embodiments, the configuration of the DCI trigger or indication upper limit can be via a DCI that is or corresponds to a defined DCI. The defined DCI can be a newly defined DCI, or according to one of a predefined or existing DCI set. In some embodiments, the configuration of the DCI trigger or indication upper limit can be responsive to the reception of any DCI.

[0167] In some embodiments, the wireless communication device may be configured to be triggered by a DCI via a high-level configuration of a parameter. The high-level configuration may be RRC, DCI, or default, and may include a field containing a parameter that triggers or indicates an upper limit. In some embodiments, the wireless communication device may be configured to be triggered by a DCI via a parameter that enables at least one function associated with an upper limit. At least one feature may be indicated or included in the high-level configuration (e.g., in a field containing a parameter).

[0168] The wireless communication device may identify or determine a condition (315) that triggers an upper limit for PDCCH monitoring. The determination may be based on a DCI received from a wireless communication node. Upon receipt, the wireless communication device may parse the DCI. Parsing of the DCI may indicate whether to trigger an upper limit for PDCCH monitoring. For example, the wireless communication device may parse N bits in a DCI field. Based on the N bits, the wireless communication device may determine whether to use a traditional value or a non-traditional value for the upper limit. If the N bits indicate the use of non-traditional (or redefined) values, the wireless communication device may determine that non-traditional values ​​are to be used for PDCCH monitoring. On the other hand, if the N bits indicate the use of traditional values, the wireless communication device may determine that traditional values ​​are to be used, and the wireless communication device may determine that these values ​​are to be used for PDCCH monitoring. When it is determined that traditional restrictions are to be used, the wireless communication device may identify, select, or otherwise apply non-traditional restrictions (320). Conversely, when it is determined that non-traditional restrictions are to be used, the wireless communication device may identify, select, or otherwise apply traditional restrictions (325).

[0169] The wireless communication device may process or decode a control channel (330) using non-traditional restrictions. The wireless communication device may decode at least one PDDCH in at least one time slot according to an upper limit set to a non-traditional value. Wireless communication may use an upper limit to monitor the PDCCH in at least one time slot. By decoding, the wireless communication device may find or identify PDCCH data (e.g., DCI). In some embodiments, the wireless communication device may apply blind decoding to search for the PDCCH within the time slot. In some embodiments, the wireless communication device may decode the PDCCH in the time slot within a time. The time may correspond to at least one target time slot, at least one target search space (SS), at least one target time slot in a target SS, or a PDCCH opportunity of a target SS, etc.

[0170] In some embodiments, the wireless communication device may identify or determine the starting position to apply the upper limit. The starting position may identify the position (e.g., time) at which the upper limit is applied to PDCCH monitoring. The determination of the starting position may be based on the application delay, or after the time slot of the DCI when the application delay is zero time units or does not exist. In some embodiments, the wireless communication device may use any number of factors to identify, calculate, or determine the application delay. In some embodiments, the determination of the application delay may be based on one or more parameters configured by a high level. In some embodiments, the determination of the application delay may be based on a parameter set of at least one physical downlink shared channel (PDSCH), physical uplink shared channel (PUSCH), or PDCCH. In some embodiments, the determination of the application delay may be based on each bandwidth part (BWP). With this determination, the wireless communication device may decode the PDCCH after a time corresponding to the application delay, or after the time slot of the DCI when the application delay is zero time units or does not exist.

[0171] In some embodiments, the wireless communication device may apply or use an upper limit when decoding at least one PDCCH during a time corresponding to the restricted time. The restricted time may be defined according to the number of time slots, the number of milliseconds, the number of PDCCH monitoring opportunities, the number of PDCCH monitoring opportunities for the SS, or according to a timer. The wireless communication device may use any number of factors to identify, calculate or determine the restricted time. In some embodiments, the restricted time may be based on a defined timer. In some embodiments, the restricted time may be based on a defined value, such as a default value, a unique value, a predefined value, a specific value, or a value in a set of values. In some embodiments, the restricted time may be based on a high-level configuration. In some embodiments, the restricted time may be based on an indication from a DCI (e.g., as specified in a field). In some embodiments, the restricted time may be based on a defined time relative to one or more channels (e.g., between a PDCCH end slot and a corresponding PDSCH or PUSCH start slot, or equal to K0 / K2 as defined above). In some embodiments, the restricted time may be based on a discontinuous reception (DRX) configuration. The determination of the starting position may be based on a slot position configured by the DCI as a triggering upper limit.

[0172] Upon decoding, the wireless communication device may identify or determine an aggregation level (AL) for a target search space (SS) and a corresponding PDCCH candidate. The aggregation level may refer to or correspond to the number of CCEs allocated to the PDCCH. For example, the aggregation level may measure the number of resource elements (e.g., in a CORESET) that carry a PDDCH (e.g., a PDCCH DCI message). To determine the AL, the wireless communication device may identify or determine a target SS. The determination of the target SS may be based on a high-level configuration, an indication in the DCI, or a defined setting (e.g., a default setting, a unique setting, a defined or predefined setting, a specified setting in a setting set).

[0173] In some embodiments, the wireless communication device may determine the AL and corresponding PDCCH candidates for the target SS from a plurality of selections. In some embodiments, the determination may be based on an indication in a DCI. The DCI may specify or define the AL and corresponding PDCCH for the target SS. In some embodiments, the determination may be based on RRC signaling. In some embodiments, the determination may be based on a baseline AL. The baseline AL may correspond to an average of the AL, a modulus, a median, a mode, or a variance in the AL, or as indicated in the DCI. In some embodiments, the determination may be based on a high-level configuration (e.g., RRC, DCI, or default). In some embodiments, the determination may be based on a defined setting (e.g., a default setting, a unique setting, a predefined setting, a specified or predefined setting in a setting set).

[0174] When determining the AL and corresponding PDCCH candidates for the target SS, the wireless communication device may identify or determine any number of ALs and corresponding PDCCH candidates. In some embodiments, the wireless communication device may determine one AL. In some embodiments, the wireless communication device may determine one AL and candidates (e.g., PDCCH candidates) corresponding to the one AL. In some embodiments, the wireless communication device may determine at least two ALs. In some embodiments, the wireless communication device may determine at least two ALs and candidates corresponding to the two ALs.

[0175] In some embodiments, the wireless communication device may identify or determine the AL in a time slot, the identification or determination being based on the identification of the AL set in another time slot. Each time slot may correspond to or may be a PDCCH opportunity time slot, a target time slot, one of the time slots in the restricted time, or any time slot, etc. In some embodiments, the wireless communication device may detect the DCI using the AL set in the first time slot. In response to detecting the DCI, the wireless communication device may determine the AL of the second time slot using the AL set detected in the first time slot. In some embodiments, the wireless communication device may identify or determine the AL or upper limit in another time slot relative to the DCI identified from one time slot. In some embodiments, the wireless communication device may decode the first time slot and monitor the first time slot using the number of DCI size types or the number of DCI formats. In some embodiments, the wireless communication device may determine the AL or upper limit in the second time slot relative to the number of DCI size types or the number of DCI formats from the first time slot.

[0176] The wireless communication device may identify or determine whether a fallback condition (335) is met. The fallback condition may define or specify a context or scenario in which a traditional value rather than a non-traditional value is to be used for an upper limit in PDCCH monitoring. The fallback condition may be associated with an upper limit having a traditional value that is triggered or indicated by a DCI received from a wireless communication node. When the fallback condition is triggered, the wireless communication device may decode the control channel using traditional restrictions for PDCCH monitoring. Otherwise, when the fallback condition is not triggered, the wireless communication device may continue to decode the control channel using non-traditional restrictions for PDCCH monitoring.

[0177] The trigger or indication of an upper limit with traditional restrictions can be similar to the trigger or indication of an upper limit with non-traditional restrictions as discussed above, and can be based on any number of factors. In some embodiments, the trigger or indication can be via one or more states in a field of a DCI or a media access control element (MAC-CE). A field in a DCI or MAC-CE can indicate whether a fallback is to be triggered (e.g., using traditional restrictions for PDCCH monitoring). In some embodiments, the trigger or indication can be via one or more bits of a DCI or MAC CE. A bit in a DCI or MAC-CE can indicate whether a fallback is to be triggered. In some embodiments, the trigger or indication can be via the end or related confirmation (ACK) or negative confirmation (NACK) of a PDSCH. When the PDSCH ends (e.g., indicated by an ACK or NACK), the wireless communication device can determine that the traditional restriction is triggered.

[0178] In some embodiments, the trigger or indication may be via a DCI corresponding to a DCI for a group of wireless communication devices (UE group DCI) or a DCI for a wireless communication device. The DCI that activates non-traditional restrictions may be used for a UE group including wireless communication devices, and the DCI that deactivates non-traditional restrictions may be a UE-specific DCI corresponding to a wireless communication device. In some embodiments, the trigger or indication of traditional restrictions may be via the expiration of a timer. The timer may track PDCCH monitoring in one or more time slots. In some embodiments, the trigger or indication of traditional restrictions may be via a defined DCI format. The DCI may be based on various formats (e.g., 1-x, 0-x, or 2-x), and one or more of the formats may be used to trigger or indicate an upper limit for PDCCH monitoring.

[0179] In some embodiments, the triggering or indication of the traditional restrictions may be via at least a portion of the DCI scrambled by the CS-RNTI or the defined RNTI. This portion of the DCI may correspond to the cyclic redundancy check portion and may be scrambled to trigger or indicate an upper limit. The RNTI may be defined or newly defined and may correspond to a wireless communication device. In some embodiments, the triggering or indication of the traditional restrictions may be via a PDCCH (such as a PDCCH allocated by a downlink (DL) semi-persistent scheduling (SPS) or an uplink (UL) authorization type 2 PDCCH, etc.). In some embodiments, the triggering or indication of the traditional restrictions may be via a defined AL. After detecting at least one of the defined ALs for triggering, the wireless communication device may enter fallback and trigger the traditional restrictions for PDCCH monitoring. In some embodiments, the triggering or indication may be via a defined condition.

[0180] The wireless communication device may decode the control channel using legacy restrictions (340). The wireless communication device may decode at least one PDDCH in at least one time slot based on an upper limit set to a legacy value. Decoding of the PDDCH using the upper limit set to the legacy value may be similar to decoding using the upper limit set to a non-legacy value, except that different values ​​are used. Decoding of the control channel using the legacy restrictions may be performed when it is determined that the legacy restrictions are to be applied or in response to triggering a fallback condition.

[0181] Although various embodiments of the present solution have been described above, it should be understood that they are presented by way of example only rather than by way of limitation. Similarly, various figures may depict example architectures or configurations, which are provided to enable those of ordinary skill in the art to understand the example features and functions of the present solution. However, these personnel will understand that the present solution is not limited to the example architectures or configurations described, but can be implemented using a variety of alternative architectures and configurations. In addition, as will be understood by those of ordinary skill in the art, 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-mentioned illustrative embodiments.

[0182] It should also be understood that any reference to an element herein using names such as "first," "second," etc. does not generally limit the number or order of those elements. Rather, these names may be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to a first element and a second element does not mean that only two elements may be employed, or that the first element must precede the second element in some manner.

[0183] In addition, those of ordinary skill in the art will appreciate that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, and symbols referenced in the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0184] It will also be understood by those of ordinary skill in the art that any of the various illustrative logical blocks, modules, processors, devices, circuits, methods, and functions described in conjunction with the aspects disclosed herein may be implemented by electronic hardware (e.g., digital implementation, analog implementation, or a combination thereof), firmware, various forms of programs or design codes containing instructions (which may be referred to herein as "software" or "software modules" for convenience), or any combination of these technologies. In order to clearly illustrate the interchangeability of such hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps have been generally described above in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software, or a combination of these technologies, depends on the specific application and the design constraints imposed on the overall system. A skilled technician may implement the described functionality in various ways for each specific application, but such implementation decisions do not result in a departure from the scope of the present disclosure.

[0185] In addition, it will be understood by those of ordinary skill in the art that the various illustrative logic blocks, modules, devices, components, and circuits described herein may be implemented within or performed by an integrated circuit (IC) including 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 for communicating with various components within a network or within a device. The general purpose processor may be a microprocessor, but in an alternative, the processor may be any conventional processor, controller, or state machine. The processor may also be implemented as a combination of computing devices for performing the functions described herein, for example, a combination of a DSP and a microprocessor, a combination of multiple microprocessors, a combination of one or more microprocessors combined with a DSP core, or a combination of any other suitable configuration.

[0186] If implemented in software, the function 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 both computer storage media and communication media, and communication media include any medium that enables a computer program or code to be transferred from one place to another. The storage medium can be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media may 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 desired program code in the form of instructions or data structures and can be accessed by a computer.

[0187] In this document, the term "module" as used herein refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. In addition, for the purpose of discussion, various modules are described as discrete modules; however, it will be apparent to one of ordinary skill in the art that two or more modules can be combined to form a single module that performs associated functions according to embodiments of the present solution.

[0188] In addition, memory or other storage devices and communication components can be used in the embodiment of the present solution. It will be understood that, for the sake of clarity, the above description has described the embodiment of the present solution with reference to different functional units and processors. However, it will be apparent that any suitable functional distribution between different functional units, processing logic elements or domains can be used without departing from the present solution. For example, the functionality to be performed by a separate processing logic element or controller can be performed by the same processing logic element or controller. Therefore, reference to a specific functional unit is only a reference to a suitable device for providing the functionality, rather than an indication of a strict logical or physical structure or organization.

[0189] Various modifications to the embodiments described in the present 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 the present disclosure. Therefore, the present disclosure is not intended to be limited to the embodiments shown herein, but should be given the widest scope consistent with the novel features and principles disclosed herein, as set forth in the claims below.

Claims

1. A wireless communication method, comprising: Receiving, by the wireless communication device, a high-level configuration from the wireless communication node; Receiving, by the wireless communication device, downlink control information DCI from the wireless communication node based on the high-layer configuration, the downlink control information being configured to trigger an upper limit for physical downlink control channel PDCCH monitoring, wherein the upper limit for PDCCH monitoring includes a maximum number of PDCCH candidates to be monitored M-PDCCH in one or more time slots, a restriction on PDCCH skipping or a restriction on PDCCH silencing, a restriction on a search space, or a restriction on a control resource set; Determining, by the wireless communication device, a starting position, a limit time, an application delay, or a time slot position of a DCI configured to trigger the upper limit to apply the upper limit; and A PDCCH in at least one time slot is decoded by the wireless communication device according to the upper limit.

2. The method according to claim 1, wherein: The upper limit for PDCCH monitoring comprises a maximum number M-CCE of non-overlapping control channel elements CCE in one or more time slots.

3. The method according to claim 2, wherein: The upper limits include: Traditional restrictions; non-traditional restrictions; having the M-PDCCH set to 0; or Having the M-CCE set to 0.

4. The method according to claim 1, wherein: Triggering the upper limit includes indicating the upper limit.

5. The method according to claim 1, wherein: The DCI is configured to trigger the upper limit via at least one of the following: The DCI has a new or defined DCI format, The DCI is scrambled by the configuration scheduling radio network temporary identifier CS-RNTI, Downlink DL semi-persistent scheduling SPS allocated PDCCH or configured uplink UL grant type 2 PDCCH, The DCI is scrambled by the defined RNTI. The DCI is a DCI for scheduling a group of wireless communication devices including the wireless communication device. N bits in the DCI, where N is greater than or equal to 1, Fields in DCI, DCI is a defined DCI, or Reception of any DCI.

6. The method according to claim 5, wherein: The N bits indicate one or more legacy restrictions or one or more non-legacy restrictions.

7. The method according to claim 1, wherein: The wireless communication device is configured to trigger the upper limit by the DCI according to the following: A high-level configuration of parameters, or parameters that enable functionality associated with the upper limit.

8. The method according to claim 2, wherein: The upper limits include: one or more values ​​of the M-PDCCH or the M-CCE for each subcarrier spacing SCS; or The value range of the M-PDCCH or the M-CCE used for each SCS.

9. The method according to claim 1, further comprising: At least one PDCCH is decoded by the wireless communication device after a time corresponding to the application delay, or after a time slot of the DCI if the application delay is equal to zero time units or is absent.

10. The method according to claim 1, further comprising: The application delay is determined by the wireless communication device according to at least one of the following: a parameter configured by a higher layer, a defined parameter, a subcarrier spacing parameter set of at least one of a physical downlink shared channel PDSCH or PDCCH, or a bandwidth part BWP.

11. The method according to claim 1, comprising: The restriction time is determined by the wireless communication device according to at least one of the following: a defined timer, a defined value, a higher layer configuration, an indication of a DCI, a defined time relative to one or more channels, or a discontinuous reception DRX configuration.

12. The method according to claim 1, wherein: The cap is triggered or indicated by at least one of the following: One or more states in the fields of the DCI or the Media Access Control Element MAC CE, One or more bits of DCI or MAC CE, the expiry of the said limit period, an end of a physical downlink shared channel PDSCH or an associated acknowledgement or negative acknowledgement ACK / NACK, the DCI being a DCI for a group of wireless communication devices or a DCI for the wireless communication device, The expiration of the timer, Defined DCI format, The DCI is scrambled by the configuration scheduling radio network temporary identifier CS-RNTI, Downlink DL semi-persistent scheduling SPS allocated PDCCH or configured uplink UL grant type 2 PDCCH, The DCI is scrambled by the defined Radio Network Temporary Identifier RNTI, The defined aggregation level AL, or Defined conditions.

13. The method according to claim 1, comprising: The wireless communication device determines an aggregation level AL and corresponding PDCCH candidates for a target search space SS.

14. The method according to claim 13, comprising: The wireless communication device determines the target SS according to a high-level configuration, an indication of a DCI or a defined setting.

15. The method according to claim 13, comprising: The wireless communication device determines, from a plurality of options, an AL and a corresponding PDCCH candidate for the target SS according to the following items: The indication in the DCI, Radio Resource Control (RRC) signaling, Baseline AL, The high-level configuration, or Defined settings.

16. The method according to claim 13, wherein: Determining the AL and corresponding PDCCH candidates for the target SS includes: determined by the wireless communication device, an AL; At least two ALs; an AL and a candidate corresponding to the AL; or At least two ALs and candidates corresponding to the two ALs.

17. The method according to claim 1, comprising: According to the wireless communication device detecting the DCI using an aggregation level AL set in a first time slot, The aggregation level of a second time slot is determined by the wireless communication device using the set of ALs.

18. The method according to claim 1, comprising: According to the wireless communication device using the number of DCI size types or the number of DCI formats to monitor and decode the first time slot, The aggregation level or upper limit of the second time slot is determined by the wireless communication device in relation to the number of DCI size types or the number of DCI formats.

19. The method according to claim 11, wherein: The restriction time is defined according to the number of time slots, the number of milliseconds, the number of PDCCH monitoring opportunities or the number of PDCCH monitoring opportunities for the search space SS, or according to a timer.

20. A wireless communication method, comprising: The wireless communication node sends a high-level configuration to the wireless communication device; The wireless communication node sends downlink control information DCI to the wireless communication device based on the high-level configuration, where the downlink control information is configured to trigger an upper limit for physical downlink control channel PDCCH monitoring, wherein the upper limit for PDCCH monitoring includes a maximum number of PDCCH candidates to be monitored M-PDCCH in one or more time slots, a restriction on PDCCH skipping or a restriction on PDCCH silencing, a restriction on a search space, or a restriction on a control resource set; causing the wireless communication device to determine a starting position, a limit time, an application delay, or a time slot position of a DCI configured to trigger the upper limit to be applied; and The wireless communication device is caused to decode a PDCCH in at least one time slot according to the upper limit.

21. A non-transitory computer readable medium storing instructions which, when executed by at least one processor, cause the at least one processor to perform the method according to any one of claims 1 to 20.

22. A wireless communication device, comprising: A memory and at least one processor, wherein the at least one processor is configured to read instructions from the memory to execute the method according to any one of claims 1 to 20.

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