Methods and apparatuses for determining search space sets for physical downlink control channel (PDCCH) monitoring

Abstract

A user equipment, a base station and a method of determining search space sets for PDCCH monitoring are provided. The UE includes a transceiver and at least one processor. The at least one processor is configured to: control the transceiver to receive, from a base station, search space set information including a first set of indices of at least one search space set; monitor a physical downlink control channel (PDCCH) according to the at least one search space set having the first set of indices; detect, based on the monitored PDCCH, a downlink control information (DCI) indicating a switch to monitoring at least one search space set of the PDCCH; and switch, based on the DCI, to the at least one search space set having a second set of indices.

Description

Technical Field

[0001] This disclosure relates to quasi-5th generation (5G) or 5G communication systems that provide higher data rates than 4th generation (4G) communication systems such as Long Term Evolution (LTE). More specifically, some embodiments of this disclosure relate to determining a search space set for PDCCH monitoring. Background Technology

[0002] To meet the increasing demand for wireless data services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or near-5G communication systems. Therefore, 5G or near-5G communication systems are also referred to as "super-4G networks" or "post-LTE systems." Compared to 4G communication systems, 5G communication systems can be implemented in higher frequency (millimeter wave) bands (e.g., the 60GHz band) to achieve higher data rates. To reduce radio wave propagation loss and increase transmission distance, beamforming, massive MIMO, full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and large antenna technologies are being considered in 5G communication systems. Furthermore, development is underway in 5G communication systems based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, coordinated multipoint (CoMP), and receiver interference cancellation, among other system network improvements. In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) have been developed as advanced coding and modulation (ACM), as well as filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies.

[0003] The Internet, a human-centric network for generating and consuming information, is evolving into the Internet of Things (IoT), where distributed entities, such as things, exchange and process information without human intervention. The Internet of Everything (IoE) is a product of IoT technology combined with big data processing technology through connections to cloud servers. Because IoT implementation requires technological elements such as sensing technology, wired / wireless communication and network infrastructure, service interface technology, and security technology, recent research has focused on sensor networks, machine-to-machine (M2M) communication, and machine-type communication (MTC). This IoT environment can provide intelligent Internet technology services that create new value for human life by collecting and analyzing data generated between connected things. Through the integration and combination of existing information technology (IT) with various industrial applications, IoT can be applied to a wide range of fields, including smart homes, smart buildings, smart cities, smart or connected cars, smart grids, healthcare, smart appliances, and advanced medical services.

[0004] Correspondingly, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, MTC, and M2M communication can be implemented through beamforming, MIMO, and array antennas. The application of cloud RAN, as a big data processing technology, can also be considered an example of the integration between 5G and IoT technologies.

[0005] As mentioned above, various services can be provided as wireless communication systems evolve, thus requiring a method that facilitates the provision of such services. Summary of the Invention

[0006] [Technical Solution]

[0007] A method for determining a search space set for PDCCH monitoring, performed by a user equipment (UE), is disclosed. The method includes: receiving search space set information from a base station, comprising a first set of indices for at least one search space set; monitoring the physical downlink control channel (PDCCH) based on the at least one search space set having the first set of indices; detecting downlink control information (DCI) based on the monitored PDCCH indicating a handover to the at least one search space set monitoring the PDCCH; and switching to the at least one search space set having a second set of indices based on the DCI. Attached Figure Description

[0008] To gain a more complete understanding of this disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which:

[0009] Figure 1 Exemplary networked computing systems according to various embodiments of the present disclosure are shown;

[0010] Figure 2 An exemplary base station (BS) in a networked computing system according to various embodiments of the present disclosure is shown;

[0011] Figure 3 Exemplary user equipment (UE) in a networked computing system according to various embodiments of the present disclosure are shown;

[0012] Figure 4A and Figure 4B Exemplary transmission and reception paths according to various embodiments of this disclosure are shown;

[0013] Figure 5 Exemplary transmitters according to various embodiments of the present disclosure are shown;

[0014] Figure 6 Exemplary receivers according to various embodiments of the present disclosure are shown;

[0015] Figure 7An exemplary encoding flowchart of the DCI format according to various embodiments of the present disclosure is shown;

[0016] Figure 8 An exemplary decoding flowchart of the DCI format according to various embodiments of the present disclosure is shown;

[0017] Figure 9 A flowchart illustrating the configuration for determining the search space set from a PDSCH scheduled in a DCI format according to various embodiments of the present disclosure is shown.

[0018] Figure 10 A flowchart is shown illustrating the determination of the TCI status of the CORESET associated with PDCCH monitoring of the search space set according to various embodiments of this disclosure;

[0019] Figure 11 A flowchart illustrating the monitoring search space set according to various embodiments of the present disclosure is shown;

[0020] Figure 12 A flowchart is shown of a multicast TB scheduled in a Type 1-PDCCH within a receive search space set t according to various embodiments of the present disclosure;

[0021] Figure 13 A flowchart is shown illustrating the transmission of HARQ-ACK information for multicast TB based on Type 1-PDCCH in a search space set according to various embodiments of the present disclosure;

[0022] Figure 14 A flowchart is shown illustrating receiving control information using a Type2-PDCCH based on a search space set according to various embodiments of the present disclosure;

[0023] Figure 15 A flowchart illustrating the reception of multiple TBs scheduled in DCI format according to various embodiments of this disclosure is shown;

[0024] Figure 16 A flowchart is shown illustrating the set of search spaces for enabling / disabling physical layer signal / channel triggering according to various embodiments of this disclosure;

[0025] Figure 17 A flowchart illustrating physical layer-based signal / channel adaptation of CORESET according to various embodiments of the present disclosure is shown;

[0026] Figure 18 A flowchart illustrating the determination of a non-overlapping CCE with an adaptation request via a physical layer signal / channel according to various embodiments of this disclosure is shown.

[0027] Figure 19A flowchart illustrating the application of an adaptation request by the UE upon receipt of the adaptation request via the MAC CE according to various embodiments of the present disclosure is shown.

[0028] Figure 20 A flowchart illustrating the application of an adaptation request or indication by a UE when it receives an adaptation request or indication via a DCI format with a CRC scrambled by C-RNTI, according to various embodiments of the present disclosure.

[0029] Figure 21 A flowchart is shown illustrating the application of an adaptation request to PDCCH monitoring in the UE when an adaptation request is received via group shared PDCCH or non-scheduled DCI in the absence of HARQ feedback, according to various embodiments of the present disclosure.

[0030] Figure 22 A flowchart illustrating the UE application adaptation delay when a power-saving signal / channel is detected outside of DRX activity time, according to various embodiments of this disclosure;

[0031] Figure 23 A flowchart illustrating the PS-DCI detected by the UE outside of DRX activity time, according to various embodiments of this disclosure, is shown.

[0032] Figure 24 A flowchart illustrating the detection by the UE of the DCI format for triggering UE adaptation at the start of the DRX ON duration according to various embodiments of the present disclosure is shown.

[0033] Figure 25 A flowchart illustrating the detection of DCI format for power saving by the UE during DRX activity time according to various embodiments of the present disclosure is shown;

[0034] Figure 26 This illustrates various embodiments of the present disclosure of triggering multi-beam transmission on a UE-adapted DCI format associated with DRX operation by means of N_MOs>1 PDCCH monitoring opportunities in each PDCCH monitoring cycle;

[0035] Figure 27 The PDCCH monitoring timings, outside the DRX ON duration that overlaps with the dynamic activity time of the previous DRX cycle, are shown according to various embodiments of this disclosure.

[0036] Figure 28 The timing of UE skipping PS-DCI monitoring according to various embodiments of this disclosure is illustrated;

[0037] Figure 29 The DCI format for repeatedly triggering UE adaptation during DRX activity time is shown according to various embodiments of this disclosure;

[0038] Figure 30 A flowchart illustrating the determination of a search space set for PDCCH monitoring according to various embodiments of the present disclosure is shown;

[0039] Figure 31 A flowchart is shown illustrating a method performed by a user equipment (UE) to determine a search space set for PDCCH monitoring according to various embodiments of the present disclosure;

[0040] Figure 32 A flowchart is shown illustrating a method performed by a base station (BS) to determine a search space set for PDCCH monitoring according to various embodiments of the present disclosure;

[0041] Figure 33 A base station according to an embodiment of the present disclosure is schematically illustrated; and

[0042] Figure 34 A user equipment (UE) according to an embodiment of the present disclosure is shown. Detailed Implementation

[0043] Implementations of this disclosure include determining user equipment (UE) and base station (BS) sets of search space for PDCCH monitoring.

[0044] One implementation relates to a UE including a receiver configured to receive a set of search spaces. The configuration may include a first set of search spaces and a second set of search spaces, as well as a first set of indices for the first set of search spaces and a second set of indices for the second set of search spaces. The UE also includes a processor operatively connected to the receiver and configured to determine an indication corresponding to either the first set of indices or the second set of indices. The receiver is further configured to receive a physical downlink control channel (PDCCH) based on the indication according to either the first set of search spaces or the second set of search spaces.

[0045] In an exemplary embodiment, the receiver is further configured to receive a PDCCH based on a shared search space, the PDCCH including a downlink control information (DCI) format; and the processor is further configured to determine an indication based on the values ​​of fields in the DCI format.

[0046] In an exemplary implementation, the value is a first set of indexes, and the indication is used only for the first set of indexes.

[0047] In an exemplary embodiment, the processor is further configured to determine an indication for the second set of indexes based on the downlink control information (DCI) format received from the PDCCH reception, according to the first set of search space sets.

[0048] In an exemplary embodiment, the receiver is further configured to receive downlink control information (DCI) format from the PDCCH reception according to a first set of search space sets, wherein the DCI format includes a duration field; and the processor is further configured to determine an indication for use only in a second set of indexes after the duration expires.

[0049] In an exemplary implementation, the configuration further includes a duration, the receiver is further configured to receive the PDCCH based on a previous indication of the first set of indexes according to the first set of search space sets, and the processor is further configured to determine an indication for use only for the second set of indexes after the duration expires.

[0050] In an exemplary implementation, the indication becomes effective at the beginning of a first time slot following a time period corresponding to a plurality of symbols.

[0051] Another implementation relates to a BS for determining a search space set for PDCCH monitoring. The BS includes a processor configured to generate a configuration for the search space set. This configuration may include a first set of search space sets and a second set of search space sets, as well as a first set of indices for the first set of search space sets and a second set of indices for the second set of search space sets. The BS also includes a transceiver operatively connected to the processor and configured to transmit the configuration and to transmit the Physical Downlink Control Channel (PDCCH) based on either the first or second set of search space sets. Furthermore, the PDCCH is based on an indication corresponding to either the first or second set of indices.

[0052] In an exemplary embodiment, the transceiver is further configured to transmit a PDCCH based on a shared search space, wherein the PDCCH includes a downlink control information (DCI) format, and wherein the DCI format includes a field having a value that can be used to determine the indication.

[0053] In an exemplary implementation, the value is a first set of indexes, and the indication is used only for the first set of indexes.

[0054] In an exemplary implementation, an indication for the second set of indices is determined based on the downlink control information (DCI) format transmitted in the PDCCH transmission, according to a first set of search space sets.

[0055] In an exemplary embodiment, the transceiver is further configured to transmit downlink control information (DCI) format in a PDCCH transmission based on a first set of search space sets, wherein the DCI format includes a duration field and an indication that, after the duration expires, it will be used only for a second set of indexes.

[0056] In an exemplary implementation, the configuration further includes a duration, and the transceiver is also configured to send the PDCCH based on a previous indication of the first set of indexes according to the first set of search space sets, and to determine an indication to be used only for the second set of indexes after the duration expires.

[0057] In an exemplary implementation, the indication becomes effective at the beginning of a first time slot following a time period corresponding to a plurality of symbols.

[0058] Another embodiment relates to a method for determining a search space set for PDCCH monitoring. The method includes the step of receiving a configuration for the search space set. The configuration includes a first search space set and a second search space set, and a first set of indices for the first search space set and a second set of indices for the second search space set. The method further includes the step of determining an indication based on either the first or second set of indices. The method includes another step of receiving the Physical Downlink Control Channel (PDCCH) based on the indication and according to either the first or second search space set.

[0059] In an exemplary embodiment, the method further includes: receiving a PDCCH based on a shared search space, wherein the PDCCH includes a downlink control information (DCI) format; and determining an indication based on the values ​​of fields in the DCI format.

[0060] In an exemplary implementation, the value is a first set of indexes, and the indication is used only for the first set of indexes.

[0061] In an exemplary implementation, the method further includes: determining an indication for a second set of indices based on a first set of search space sets, based on the downlink control information (DCI) format received in the PDCCH reception.

[0062] In an exemplary embodiment, the method further includes: receiving downlink control information (DCI) format in PDCCH reception according to a first set of search space sets, wherein the DCI format includes a duration field; and determining an indication that the data will be used only for a second set of indexes after the duration expires.

[0063] In an exemplary implementation, the configuration further includes a duration, and the method further includes: receiving a PDCCH based on a previous indication of a first set of indexes, according to a first set of search space sets; and determining an indication to be used only for a second set of indexes after the duration expires.

[0064] In an exemplary embodiment, a method for determining a search space set for PDCCH monitoring, performed by a user equipment (UE), is disclosed. The method includes: receiving search space set information from a base station, the search space set information including a first set of indices for at least one search space set; monitoring the physical downlink control channel (PDCCH) based on the at least one search space set having the first set of indices; detecting downlink control information (DCI) indicating a handover to the at least one search space set monitoring the PDCCH based on the monitored PDCCH; and switching to the at least one search space set having a second set of indices based on the DCI.

[0065] In an exemplary implementation, the DCI includes information indicating a second set of indices to switch to.

[0066] In an exemplary implementation, switching to at least one search space set with a second set of indexes includes: starting to monitor PDCCH based on at least one search space set with a second set of indexes, and stopping monitoring PDCCH based on at least one search space set with a first set of indexes, based on DCI.

[0067] In an exemplary implementation, the DCI is received via the CSS (Shared Search Space).

[0068] In an exemplary embodiment, switching to at least one search space set with a second set of indexes includes: starting to monitor the PDCCH according to at least one search space set with a second set of indexes after a predetermined time following the receipt of the DCI.

[0069] In an exemplary implementation, wherein the DCI includes duration information for monitoring, switching to at least one search space set having a second set of indexes includes: initiating monitoring of the PDCCH based on the duration information indicated by the DCI according to at least one search space set having a second set of indexes.

[0070] In an exemplary implementation, the DCI indicates switching at least one search space set currently being monitored to at least one other search space set, and the switching to at least one search space set having a second set of indices includes: based on the DCI, starting to monitor the PDCCH according to at least one other search space set corresponding to the second set of indices, and stopping monitoring the PDCCH according to at least one search space set currently being monitored corresponding to the first set of indices.

[0071] In an exemplary embodiment, the method further includes: receiving timer information set by a higher-level signal for switching at least one spatial search set; and wherein switching to at least one search space set having a second set of indices includes: starting to monitor the PDCCH based on the timer according to at least one search space set having a second set of indices.

[0072] In an exemplary implementation, search space set information is received via an RRC signal.

[0073] In an exemplary embodiment, a method for determining a search space set for PDCCH monitoring, performed by a base station (BS), is disclosed. The method includes: sending search space set information to a user equipment (UE), the search space set information including a first set of indices for at least one search space set; and sending a Physical Downlink Control Channel (PDCCH) to the UE based on the at least one search space set having the first set of indices, wherein the PDCCH includes downlink control information (DCI) indicating a handover of at least one search space set for monitoring the PDCCH.

[0074] In an exemplary implementation, the DCI includes information indicating a second set of indices to switch to.

[0075] In an exemplary implementation, the DCI instructs the switching of at least one search space set currently being monitored to at least one other search space set.

[0076] In an exemplary embodiment, a user equipment (UE) includes: a transceiver; and at least one processor connected to the transceiver and configured to: control the transceiver to receive search space set information from a base station, the search space set information including a first set of indices for at least one search space set; monitor a physical downlink control channel (PDCCH) based on the at least one search space set having the first set of indices; detect downlink control information (DCI) indicating a switch to the at least one search space set monitoring the PDCCH based on the monitored PDCCH; and switch to at least one search space set having a second set of indices based on the DCI.

[0077] In an exemplary embodiment, the DCI includes information indicating a second set of indices to switch to; and at least one processor is further configured to: start monitoring the PDCCH based on the DCI according to at least one search space set having the second set of indices, and stop monitoring the PDCCH based on at least one search space set having the first set of indices.

[0078] In an exemplary embodiment, the DCI indicates switching at least one search space set currently being monitored to at least one other search space set; and at least one processor is further configured to: start monitoring PDCCH based on the DCI according to at least one other search space set corresponding to the second set of indices, and stop monitoring PDCCH based on at least one search space set currently being monitored according to the first set of indices.

[0079] Other technical features may be obvious to those skilled in the art based on the accompanying drawings, description and claims.

[0080] Before proceeding with the following detailed description, it may be advantageous to define certain words and phrases used throughout the patent document. The term “connection” and its derivatives refer to any direct or indirect communication between two or more elements, regardless of whether these elements are physically in contact with each other. The terms “transmit,” “receive,” and “communicate,” and their derivatives cover both direct and indirect communication. The terms “include” and “comprise,” and their derivatives imply non-restrictive inclusion. The term “or” is inclusive, meaning and / or. The phrase “associated with,” and its derivatives mean including, being contained within, interconnected with, including, being included in, connected to or connected with, linked to or connected with, communicating with, cooperating with, intertwined, juxtaposed, proximate, bound to or bound with, having, possessing the characteristics of, having a relationship with, etc. The term “controller” refers to any device, system, or part thereof that controls at least one operation. Such a controller may be implemented in hardware or a combination of hardware and software and / or firmware. Whether local or remote, the functionality associated with any particular controller may be centralized or distributed. The phrase "at least one," when used with a list of items, means that different combinations of one or more of the listed items may be used, and only one item from the list may be required. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C. Similarly, the term "set" means one or more. Therefore, a set of items can be a single item or a collection of two or more items.

[0081] Furthermore, the various functions described below may be implemented or supported by one or more computer programs, each computer program being formed by computer-readable program code and implemented in a computer-readable medium. The terms "application program" and "program" refer to one or more computer programs, software components, instruction sets, procedures, functions, objects, classes, examples, associated data, or portions thereof that are implemented in suitable computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code, and executable code. The phrase "computer-readable medium" includes any type of media accessible by a computer, such as read-only memory (ROM), random access memory (RAM), hard disk drive, optical disc (CD), digital video disc (DVD), or any other type of storage. "Non-transitory" computer-readable media excludes wired, wireless, optical, or other communication links that transmit transient electrical signals or other transient signals. Non-transitory computer-readable media includes media capable of permanently storing data, as well as media capable of storing data and subsequently rewriting it, such as rewritable optical discs or erasable storage devices.

[0082] Throughout the patent document, definitions are provided for certain other words and phrases. Those skilled in the art will understand that, in many (if not most) examples, such definitions apply to the prior and future use of the words and phrases defined herein.

[0083] Invention Embodiments

[0084] The accompanying drawings and various embodiments used to describe the principles of this disclosure are merely illustrative and should not be construed as limiting the scope of this disclosure in any way. Furthermore, those skilled in the art will understand that the principles of this disclosure can be implemented in any suitably arranged wireless communication system.

[0085] The following documents are incorporated herein by reference, as fully set forth herein: 3GPP TS 38.211 v15.5.0, “NR; Physical channels and modulation”, hereinafter referred to as “REF1”; 3GPP TS 38.212 v15.5.0, “NR; Multiplexing and channel coding”, hereinafter referred to as “REF 2”; 3GPP TS 38.213 v15.5.0, “NR; Physical layer procedures for control”, hereinafter referred to as “REF 3”; 3GPP TS 38.214 v15.5.0, “NR; Physical layer procedures for data”, hereinafter referred to as “REF 4”; 3GPP TS 38.215 v15.5.0, “NR; Physical layer measurements”, hereinafter referred to as “REF 5”; 3GPP TS 38.321 v15.5.0, “NR; Medium Access Control (MAC) protocol specification”, hereinafter referred to as “REF 6”; 3GPP TS 38.331 v15.5.0, “NR; Radio Resource Control (RRC) protocol specification”, hereinafter referred to as “REF 7”; and 3GPP TR 38.840 v0.1.1, “NR1 Study on UE power Saving”, hereinafter referred to as “REF 8”.

[0086] The time unit for downlink (DL) or uplink (UL) signaling on a cell can include one or more symbols in a time slot. A time slot comprises a predetermined number of symbols (such as 14 symbols) and has a predetermined duration. A bandwidth (BW) unit is called a resource block (RB). An RB comprises multiple subcarriers (SCs), and one SC in a symbol of a time slot is called a resource element (RE). In one example, when an RB comprises 12 SCs with an inter-SC spacing of 15 kHz, the time slot can have a duration of 1 millisecond and the RB can have a bandwidth of 180 kHz. In another example, when an RB comprises 12 SCs with an inter-SC spacing of 60 kHz, the time slot can have a duration of 0.25 milliseconds and the RB can have a bandwidth of 720 kHz. A time slot can include symbols for DL ​​transmission or for UL transmission, including all symbols for DL ​​transmission or all symbols for UL transmission. For more details, please refer to REF 1.

[0087] DL signals include data signals that transmit information content, control signals that transmit DL control information (DCI), and reference signals (RS), also known as pilot signals. The gNB transmits data information or DCI via the corresponding Physical DL Shared Channel (PDSCH) or Physical DL Control Channel (PDCCH). The gNB transmits one or more of several types of RS, including Channel State Information RS (CSI-RS) and Demodulated RS (DMRS), as discussed in more detail in REF 1. CSI-RS is primarily intended for the UE to perform measurements and provide Channel State Information (CSI) to the gNB. DMRS is only received in the BW received by the corresponding PDCCH or PDSCH, and the UE typically uses DMRS to demodulate data or control information.

[0088] UL signals also include data signals that transmit information content, control signals that transmit UL control signals (UCI), DMRS associated with data or UCI demodulation, probe RS (SRS) that enables the gNB to perform UL channel measurements, and random access (RA) preambles that enable the UE to perform random access (as discussed in more detail in REF 1). The UE transmits data information or UCI via the corresponding Physical UL Shared Channel (PUSCH) or Physical UL Control Channel (PUCCH). When the UE transmits both data information and UCI simultaneously, the UE can multiplex them in the PUSCH. UCI includes a Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) message indicating whether a transport block (TB) containing data information in the PDSCH has been correctly or incorrectly detected, a scheduling request (SR) indicating whether the UE has data to transmit in its buffer, and a CSI report that enables the gNB to select appropriate parameters for transmission to the UE's PDSCH or PDCCH (as discussed in more detail in REF 4).

[0089] UL RS includes DMRS and SRS. DMRS is transmitted only in the BW of the corresponding PUSCH or PUCCH transmission. The gNB can use DMRS to demodulate information in the corresponding PUSCH or PUCCH. SRS is transmitted by the UE to provide UL CSI to the gNB, and for TDD systems, DL CSI is also provided. Additionally, to establish synchronization or initial RRC connection with the gNB, the UE can transmit the Physical Random Access Channel (PRACH), as discussed in more detail in REF 3 and REF 5. To reduce the control overhead of scheduling reception or transmission on multiple RBs, RB groups (RBGs) can be used as units for PDSCH reception or PUSCH transmission, where an RBG comprises a predetermined number of RBs (see also REF 2 and REF 4).

[0090] DL or UL transmission can be based on Orthogonal Frequency Division Multiplexing (OFDM) waveforms, including the use of a variant of DFT precoding known as DFT-spread-OFDM, as discussed in more detail in REF 1. Exemplary transmitters and receivers using OFDM are described later. Figure 5 and Figure 6 It is described in the text.

[0091] UEs typically monitor multiple candidate locations for corresponding potential PDCCH transmissions to decode multiple candidate DCI formats in a time slot, as described in REF 3, for example. The DCI format includes Cyclic Redundancy Check (CRC) bits for UE confirmation of correct DCI format detection. The DCI format type is identified by a Radio Network Temporary Identifier (RNTI) scrambled with the CRC bits, as described in REF 2. For DCI formats scheduled to a single UE's PDSCH or PUSCH, the RNTI can be the Cell RNTI (C-RNTI) and act as the UE identifier. For DCI formats scheduled to deliver System Information (SI), the RNTI can be the SI-RNTI. For DCI formats scheduled to provide a Random Access Response (RAR), the RNTI can be the RA-RNTI. For DCI formats providing Transmit Power Control (TPC) commands to a group of UEs, the RNTI can be the TPC-RNTI. Each RNTI type can be configured to the UE via higher-layer signaling (such as RRC signaling), as discussed in REF 5. The DCI format for PDSCH transmissions scheduled to the UE is also known as the DL DCI format or DL ​​allocation, while the DCI format for PUSCH transmissions scheduled from the UE is also known as the UL DCI format or UL authorization.

[0092] PDCCH transmission can occur within a set of PRBs. The gNB can configure one or more PRB sets for the UE for PDCCH reception, also known as a control resource set (CORESET) (see also REF3). PDCCH transmission can occur within the control channel element (CCE) of the CORESET. The UE can determine the CCE for PDCCH reception based on a search space set (see also REF 3). The set of CCEs available for the UE's PDCCH reception defines the location of candidate PDCCHs.

[0093] The following Figure 7 and Figure 8 The text discusses exemplary encoding and decoding processes for the DCI format.

[0094] For each DL bandwidth portion (BWP) configured for the UE in the serving cell, multiple CORESETs can be provided to the UE via higher-layer signaling. For each CORESET, the following is provided to the UE:

[0095] CORESET index p; DM-RS scrambling sequence initialization value;

[0096] The precoder granularity of multiple REGs in the frequency range, where the UE may be assumed to be using the same DM-RS precoder;

[0097] Multiple consecutive symbols;

[0098] A set of resource blocks;

[0099] Parameters for CCE to REG mapping;

[0100] Antenna port quasi-synchronization in a set of antenna port quasi-synchronization indicates the quasi-synchronization information of the DM-RS antenna port performing PDCCH reception; and

[0101] For DCI format 1_1 transmitted via PDCCH in CORESET p, this indicates whether the Transport Configuration Indicator (TCI) field is present. Further details are provided in REF 1, REF 2, and REF 3.

[0102] For each DL BWP configured for the UE in the serving cell, multiple search space sets are provided to the UE via higher-layer signaling. For each of the multiple search space sets, the following items are provided to the UE (see also REF 3):

[0103] Search space set indexes s;

[0104] Search for the association between the search space set s and the CORESET index p;

[0105] k s The PDCCH monitoring cycle and o in each time slot sPDCCH monitoring offset for each time slot;

[0106] The PDCCH monitoring mode within a time slot indicates the first symbol of the control resource set within the time slot used for PDCCH monitoring;

[0107] Number of candidate PDCCH per CCE aggregation level L

[0108] An indication of whether the search space set 's' is a shared search space set or a UE-specific search space set; and

[0109] T indicates the number of time slots in which the search space set s exists. s <k s The duration of each time slot.

[0110] For the search space set s associated with CORESET p, for the carrier indicator field value n CI (Also known as the search space) corresponding service cell, time slot Candidate PDCCH in the search space set The CCE index for the corresponding aggregation level L is given in Equation 1:

[0111]

[0112] in:

[0113] For any shared search space,

[0114] For a specific search space of UE Y p，-1 =n RNTI ≠0, for pmod3=0, A p =39827; for pmod3=1, A p =39829; for pmod3=2 and D=65537, A p =39839;

[0115] i = 0, ..., L-1;

[0116] N CCE，p This refers to the number of CCEs in CORESET p, numbered from 0 to N. CCE，p -1;

[0117] If the UE is configured with a carrier indicator field, then n CI It is the value of the carrier indicator field; otherwise, including for any shared search space, n CI =0;

[0118] in The UE is configured to target n CI The number of candidate PDCCHs monitored at the aggregation level L of the serving cell corresponding to the search space set s;

[0119] For any shared search space,

[0120] For a specific search space of UE It is a CCE aggregation level L that traverses all n configurations of the search space set s within the control resource set p. CI Maximum value as well as

[0121] For n RNTI The RNTI value.

[0122] PUCCH can be transmitted according to one of several PUCCH formats as described in REF 1 and REF 3. Since different UCI payloads require different PUCCH transmission structures to improve the associated UCI block error rate (BLER), the PUCCH format corresponds to a structure designed for a specific UCI payload range. PUCCH transmission is also associated with TCI states that provide spatial domain filtering for PUCCH transmission, as described in REF 3 and REF 4. PUCCH can be used to transmit HARQ-ACK information, SR, or periodic / semi-persistent CSI, and combinations thereof.

[0123] The UE can be configured to operate using multiple bandwidth portions (BWPs) from the DL system BW (DL BWP) and UL system BW (UL BWP), as described in REF 3. At any given time, only one DL BWP and only one UL BWP are active for the UE. Various parameters can be configured individually for each corresponding BWP, such as the search space set configuration for PDCCH reception or the PUCCH resources for PUCCH transmission. The primary purpose of BWP operation is to achieve energy savings for the UE. Larger BWPs can be used when the UE has data to transmit or receive, and for example, there can be more than one search space set with a short monitoring period. Smaller BWPs can be used when the UE has no data to transmit or receive, and for example, a single search space set can be configured with a longer monitoring period.

[0124] NR Rel-15 supports two types of search spaces: UE-specific search space (USS) and shared search space (CSS). The UE uses the corresponding C-RNTI to determine the CCE position of the candidate PDCCH in the USS and determines the CCE position in the CSS independently of the RNTI, as described in Equation 1.

[0125] Table 1 outlines the search space set types according to REF 3 and the corresponding RNTIs according to the DCI formats of REF 2 and REF 3.

[0126]

[0127]

[0128] Table 2. Relationship between RNTI type and search space

[0129] Table 2

[0130]

[0131] Aside from the previously mentioned exceptions, using CSS can be beneficial for other functionalities. For example, CSS can be used to multicast data to a group of users, such as multicasting virtual reality video to people in the same room, or, for massive machine-type communication (mMTC) applications, multicasting industrial control messages to machines.

[0132] In NR Rel-15, after a UE establishes an RRC connection with a gNB, the UE can be configured to monitor the PDCCH in the CSS of the corresponding DCI format via a UE-specific RRC IE (such as the PDCCH-config described in REF 2 and REF 5). When addressing a subgroup of UEs configured to monitor the DCI format is required, the DCI format can schedule PDSCH reception, and the UEs that need to process the information content of the DCI format or the TB information content in the PDSCH can be indicated by the information in the PDSCH. For example, when a group of UEs in the RRC_CONNECTED state is configured to monitor the PDCCH in the CSS to detect the DCI format and obtain adaptation requests (such as a request to put the UE into sleep mode so that it does not monitor the PDCCH for at least a period of time), the UE subgroups in this group can be indicated by the information in the PDSCH scheduled for the DCI format, and the remaining UEs in this group can ignore the adaptation requests.

[0133] Therefore, the novelty aspect of this disclosure recognizes the need to: determine PDCCH allocation, including a search space for blind decoding, a search space set, candidate PDCCHs, and non-overlapping CCEs; support multicasting data and control messages to a group of UEs; define PDCCH types for multicasting transport blocks (TBs) to a group of UEs; define PDCCH types for multicasting shared control information to a group of UEs; and enhance PDCCH transmission to a group of UEs.

[0134] To achieve UE power saving, dynamic adaptation of UE PDCCH monitoring has been considered, such as skipping PDCCH monitoring of one or more search space sets for a period of time, or enabling (disabling) CORESET / search space sets, as well as adapting the PDCCH monitoring cycle / duration. Compared to the power required for UE PDCCH monitoring as previously described for Rel-15 NR, the various schemes in REF 8 for reducing PDCCH monitoring show UE power saving gains of 0.5% to 85%. For continuous traffic corresponding to the UE's full buffer, lower power saving gains of 0.5% to 15% were observed. For distributed arrival traffic corresponding to the UE's more typical FTP-based service mode, high power saving gains of 50% to 85% were observed.

[0135] In NR Rel-15, the UE monitors the PDCCH (candidate PDCCHs decoded at the appropriate PDCCH monitoring time) based on a search space set provided to the UE for each serving cell and a BWP enabled by the serving gNB in ​​each serving cell. The configuration of the search space set is provided to the UE via higher-layer signaling, thus not allowing the UE to quickly adapt to PDCCH monitoring to address dynamic changes in the UE's service patterns. Faster UE adaptation to PDCCH monitoring (such as adaptation provided by the DCI format in the PDCCH or by MAC control elements) can significantly reduce the UE's power consumption for PDCCH monitoring by enabling / disabling decoding operations associated with candidate PDCCHs in the search space set according to dynamic changes in service, while avoiding potential increases in scheduling latency or throughput loss when the UE is provided with an insufficient number of candidate PDCCHs.

[0136] Therefore, other novel aspects of this disclosure also recognize the need for: enabling adaptation of PDCCH monitoring to the search space set via physical layer signals / channels; providing an indication of the timing of PDCCH monitoring when adapting PDCCH monitoring via physical layer signals / channels; determining candidate PDCCHs and non-overlapping CCEs for each time slot or each PDCCH monitoring timing for DL ​​BWP when adapting PDCCH monitoring via physical layer signals / channels; defining a timeline for applying adaptation requests via physical layer signals / channels; determining the interpretation of the DCI format for triggering UE adaptation, at least for energy-saving purposes; determining the timing of physical layer signal / channel monitoring for triggering UE adaptation associated with DRX operation in the RRC_CONNECTED state; and determining the timing of physical layer signal / channel monitoring for triggering UE adaptation unrelated to DRX operation in the RRC_CONNECTED state.

[0137] Figure 1 Exemplary networked computing systems according to various embodiments of the present disclosure are shown. Figure 1 The embodiments of the wireless network 100 shown are for illustrative purposes only. Other embodiments of the wireless network 100 may be used without departing from the scope of this disclosure.

[0138] like Figure 1 As shown, the wireless network 100 includes gNodeB (gNB) 101, gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one Internet Protocol (IP) network 130 (such as the Internet, a private IP network, or other data network).

[0139] gNB 102 provides wireless broadband access to network 130 to a first plurality of user equipments (UEs) within its coverage area 120. The first plurality of UEs includes: UE 111, which may be located in a small business (SB); UE 112, which may be located in an enterprise (E); UE 113, which may be located in a Wi-Fi hotspot (HS); UE 114, which may be located in a first residence (R); UE 115, which may be located in a second residence (R); and UE 116, which may be a mobile device (M), such as a cellular phone, wireless laptop computer, wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 to a second plurality of UEs within its coverage area 125. The second plurality of UEs includes UE 115 and UE 116.

[0140] Depending on the network type, the term "base station" can refer to any component (or set of components) configured to provide wireless access to the network, such as a transmitting point (TP), a transmitting-receiving point (TRP), a gNB, a macro cell, a femtocell, a Wi-Fi access point (AP), or other wireless enabling device. A base station may provide wireless access according to one or more wireless communication protocols, such as 5G 3GPP New Radio Interface / Access (NR), Long Term Evolution (LTE), LTE-Advanced (LTE-A), High Speed ​​Packet Access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc. Additionally, depending on the network type, "user equipment" or "UE" may be replaced by other well-known terms such as "mobile station," "subscriber station," "remote terminal," "wireless terminal," or "user device." For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to a remote wireless device that provides wireless access to a gNB, whether the UE is a mobile device (such as a mobile phone or smartphone) or a fixed device as commonly considered (such as a desktop computer or vending machine).

[0141] The dashed lines indicate the approximate extent of coverage areas 120 and 125, which are shown as approximately circular for illustrative and explanatory purposes only. It should be clearly understood that coverage areas associated with the gNB (such as coverage areas 120 and 125) may have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment related to natural and man-made obstacles.

[0142] As described in more detail below, the wireless network 100 may be a 5G communication system, wherein a UE (such as UE 116) may communicate with a BS (such as BS 102) to determine a search space set for PDCCH monitoring.

[0143] although Figure 1 An example of a wireless network 100 is shown, but it is possible to... Figure 1 Various modifications can be made. For example, wireless network 100 may include any number of gNBs and any number of UEs arranged in any suitable configuration. Additionally, gNB 101 may communicate directly with any number of UEs and provide these UEs with wireless broadband access to network 130. Similarly, each gNB 102 and gNB 103 may communicate directly with network 130 and provide UEs with direct wireless broadband access to network 130. Furthermore, gNB 101, gNB 102, and / or gNB 103 may provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0144] Figure 2 Exemplary base stations (BSs) according to various embodiments of the present disclosure are shown. Figure 2 The embodiment of gNB 102 shown is for illustrative purposes only, and Figure 1 The gNB 101 and gNB 103 can have the same or similar configurations. However, gNBs have multiple configurations, and Figure 2 This disclosure is not intended to limit the scope of any particular implementation of gNB.

[0145] like Figure 2 As shown, gNB 102 includes multiple antennas 280a to 280n, multiple RF transceivers 282a to 282n, transmit (TX) processing circuitry 284, and receive (RX) processing circuitry 286. gNB 102 also includes a controller / processor 288, a memory 290, and a backhaul or network interface 292.

[0146] RF transceivers 282a to 282n receive input RF signals, such as signals transmitted by the UE in network 100, from antennas 280a to 280n. RF transceivers 282a to 282n down-convert the input RF signals to generate IF or baseband signals. The IF or baseband signals are sent to RX processing circuitry 286, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signals. RX processing circuitry 286 sends the processed baseband signal to controller / processor 288 for further processing.

[0147] TX processing circuit 284 receives analog or digital data (such as voice data, web data, email, or interactive video game data) from controller / processor 288. TX processing circuit 284 encodes, multiplexes, and / or digitizes the output baseband data to generate a processed baseband or IF signal. RF transceivers 282a to 282n receive the processed baseband or IF signal from TX processing circuit 284 and up-convert the baseband or IF signal into an RF signal transmitted via antennas 280a to 280n.

[0148] The controller / processor 288 may include one or more processors or other processing means that control the overall operation of the gNB 102. For example, the controller / processor 288 may control the reception of forward channel signals and the transmission of reverse channel signals via RF transceivers 282a to 282n, RX processing circuitry 286, and TX processing circuitry 284, according to known principles. The controller / processor 288 may also support additional functions, such as more advanced wireless communication functions. For example, the controller / processor 288 may support beamforming or directional routing operations, differently weighting the output signals from multiple antennas 280a to 280n to effectively direct the output signals in a desired direction. The controller / processor 288 may support any of a variety of other functions in the gNB 102. In some embodiments, the controller / processor 288 includes at least one microprocessor or microcontroller.

[0149] The controller / processor 288 is also capable of executing programs and other processes residing in the memory 290, such as the basic operating system. The controller / processor 288 can move data into or out of the memory 290 as needed for the execution process.

[0150] The controller / processor 288 is also coupled to a backhaul or network interface 292. The backhaul or network interface 292 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or over a network. Interface 292 can support communication via any suitable wired or wireless connection. For example, when the gNB 102 is implemented as part of a cellular communication system such as one supporting 5G, LTE, or LTE-A, interface 292 can allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, interface 292 can allow the gNB 102 to communicate with a larger network (such as the Internet) via a wired or wireless local area network or via a wired or wireless connection. Interface 292 includes any suitable architecture supporting communication via wired or wireless connections, such as Ethernet or RF transceivers.

[0151] The memory 290 is coupled to the controller / processor 288. A portion of the memory 290 may include RAM, and another portion of the memory 290 may include flash memory or other ROM.

[0152] As described in more detail below, BS 102 can transmit data to UEs (such as...) via a networked computing system. Figure 1 The UE 116 in the system conveys information to determine the search space set used for PDCCH monitoring.

[0153] although Figure 2 An example of gNB 102 is shown, but it is possible to compare it with other models. Figure 2 Various changes can be made. For example, gNB 102 can include any number of Figure 2 Each component shown. As a specific example, an access point may include multiple interfaces 292, and a controller / processor 288 may support routing functionality for routing data between different network addresses. As another specific example, although shown as an example including a single TX processing circuit 284 and a single RX processing circuit 286, the gNB102 may include multiple examples of each (such as one example per RF transceiver). Additionally, Figure 2 The various components can be combined, further subdivided, or omitted, and additional components can be added as needed.

[0154] Figure 3 Exemplary user equipment (UE) according to various embodiments of the present disclosure are shown. Figure 3 The embodiment of UE 116 shown is for illustrative purposes only, and Figure 1 UEs 111 to UE 115 may have the same or similar configurations. However, UEs have multiple configurations, and Figure 3 This disclosure is not intended to limit the scope of any particular implementation of the UE.

[0155] like Figure 3 As shown, UE 116 includes an antenna 305, a radio frequency (RF) transceiver 310, a transmit (TX) processing circuitry 315, a microphone 320, and a receive (RX) processing circuitry 325. UE 116 also includes a speaker 330, a main processor 340, an input / output (I / O) interface (IF) 345, a keypad 350, a display 355, and a memory 360. The memory 360 includes a basic operating system (OS) program 361 and one or more applications 362.

[0156] RF transceiver 310 receives an input RF signal transmitted by a gNB of network 100 from antenna 305. RF transceiver 310 down-converts the input RF signal to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is sent to RX processing circuitry 325, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. RX processing circuitry 325 sends the processed baseband signal to speaker 330 (e.g., for voice data) or to main processor 340 for further processing (e.g., for web browsing data).

[0157] The TX processing circuit 315 receives analog or digital voice data from the microphone 320, or other baseband data (such as web data, email, or interactive video game data) output from the main processor 340. The TX processing circuit 315 encodes, multiplexes, and / or digitizes the output baseband data to generate a processed baseband or IF signal. The RF transceiver 310 receives the processed baseband or IF signal from the TX processing circuit 315 and up-converts the baseband or IF signal into an RF signal transmitted via the antenna 305.

[0158] The main processor 340 may include one or more processors or other processing devices and executes a basic OS program 361 stored in memory 360 to control the overall operation of UE 116. For example, the main processor 340 may control the reception of forward channel signals and the transmission of reverse channel signals through RF transceiver 310, RX processing circuitry 325, and TX processing circuitry 315 according to known principles. In some embodiments, the main processor 340 includes at least one microprocessor or microcontroller.

[0159] The main processor 340 is also capable of executing other processes and programs residing in the memory 360. The main processor 340 can move data into or out of the memory 360 as needed by the executing process. In some embodiments, the main processor 340 is configured to execute an application program 362 based on an OS program 361 or in response to signals received from a gNB or operator. The main processor 340 is also coupled to an I / O interface 345, which provides the UE 116 with the ability to connect to other devices, such as laptop computers and handheld computers. The I / O interface 345 is the communication path between these accessories and the main processor 340.

[0160] The main processor 340 is also connected to the keypad 350 and the display unit 355. The operator of the UE 116 can use the keypad 350 to input data into the UE 116. The display 355 may be a liquid crystal display or other display capable of displaying text and / or at least limited graphics (such as from a website).

[0161] The memory 360 is coupled to the main processor 340. A portion of the memory 360 may include random access memory (RAM), and another portion of the memory 360 may include flash memory or other read-only memory (ROM).

[0162] As described in more detail below, UE 116 can connect to a networked computing system and a BS (such as...) Figure 2 The BS 102 in the UE conveys information to determine the search space set used for PDCCH monitoring.

[0163] although Figure 3 An example of UE 116 is shown, but it is possible to modify it. Figure 3 Make various changes. For example, Figure 3 The various components can be combined, further subdivided, or omitted, and additional components can be added as needed. As a specific example, the main processor 340 can be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Furthermore, although... Figure 3 The UE 116 is shown configured as a mobile phone or smartphone, but the UE can be configured to operate as other types of mobile or fixed devices.

[0164] Figure 4A and Figure 4B Exemplary wireless transmission and reception paths according to various embodiments of this disclosure are shown. Figure 4A and Figure 4B In the context of downlink communication, the transmitting path circuitry can be implemented in the base station (gNB) 102 or a relay station, and the receiving path circuitry can be implemented in the user equipment (e.g., Figure 1The user equipment 116) is implemented in the base station. In other examples, for uplink communication, the receive path circuit 450 may be implemented in the base station (e.g., Figure 1 Implemented in gNB 102 or a relay station, and the transmission path circuit can be in the user equipment (e.g., Figure 1 Implemented in user equipment 116).

[0165] The transmit path 400 includes a channel coding and modulation block 405, a serial-to-parallel (S to P) block 410, an N-size inverse fast Fourier transform (IFFT) block 415, a parallel-to-serial (P to S) block 420, a cyclic prefix addition block 425, and an up-converter (UC) 430. The receive path 450 includes a down-converter (DC) 455, a cyclic prefix removal block 460, a serial-to-parallel (S to P) block 465, an N-size fast Fourier transform (FFT) block 470, a parallel-to-serial (P to S) block 475, and a channel decoding and demodulation block 480.

[0166] At least some components of the transmit path 400 and receive path 450 may be implemented in software, while other components may be implemented using configurable hardware or a combination of software and configurable hardware. In particular, it should be noted that the FFT and IFFT blocks described in this disclosure may be implemented as configurable software algorithms, wherein the size value N may be modified depending on the implementation method.

[0167] Furthermore, although this disclosure relates to embodiments of implementing the Fast Fourier Transform (FFT) and Inverse Fast Fourier Transform (IFFT), this is merely illustrative and should not be construed as limiting the scope of this disclosure. It will be understood that in alternative embodiments of this disclosure, the FFT and IFFT functions can be readily replaced by Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions, respectively. It will be understood that for the DFT and IDFT functions, the value of variable N can be any integer (i.e., 1, 4, 3, 4, etc.), while for the FFT and IFFT functions, the value of variable N can be any integer that is a power of 2 (i.e., 1, 2, 4, 8, 16, etc.).

[0168] In the following example, a transmit path 400 is implemented in the BS, and a receive path is implemented in the UE. In transmit path 400, channel coding and modulation block 405 receives a set of information bits and applies coding (e.g., LDPC coding) and modulation (e.g., Quadrature Phase Shift Keying (QPSK) or Quadrature Amplitude Modulation (QAM)) to the input bits to produce a frequency-domain modulated symbol sequence. Serial-to-parallel block 410 converts (i.e., demultiplexes) the serial modulated symbols into parallel data to produce N parallel symbol streams, where N is the IFFT / FFT size used in BS 102 and UE 116. Then, IFFT block 415 of size N performs an IFFT operation on the N parallel symbol streams to produce a time-domain output signal. Parallel-to-serial block 420 converts (i.e., multiplexes) the parallel time-domain output symbols from IFFT block 415 of size N to produce a serial time-domain signal. Then, cyclic prefix addition block 425 inserts a cyclic prefix into the time-domain signal. Finally, the upconverter 430 modulates (i.e., upconverts) the output of the added cyclic prefix block 425 to the RF frequency for transmission via the wireless channel. The signal can also be filtered at the baseband before being converted to the RF frequency.

[0169] The transmitted RF signal reaches the UE after passing through the wireless channel and performs the reverse operation relative to the gNB operation. Downconverter 455 downconverts the received signal to the baseband frequency, and cyclic prefix removal block 460 removes the cyclic prefix to generate a serial time-domain baseband signal. Serial-to-parallel block 465 converts the time-domain baseband signal into a parallel time-domain signal. Then, an N-size FFT block 470 performs an FFT algorithm to generate N parallel frequency-domain signals. Parallel-to-serial block 475 converts the parallel frequency-domain signals into a sequence of modulated data symbols. Channel decoding and demodulation block 480 demodulates and decodes the modulated symbols to recover the original input data stream.

[0170] Each of gNBs 101 to 103 may implement a transmission path similar to that transmitted to user equipment 111 to 116 in the downlink, and may implement a reception path similar to that received from user equipment 111 to 116 in the uplink. Similarly, each of user equipment 111 to 116 may implement a transmission path corresponding to the architecture used for transmission to gNBs 101 to 103 in the uplink, and may implement a reception path corresponding to the architecture used for reception from gNBs 101 to 103 in the downlink.

[0171] As described in more detail below, transmit path 400 and receive path 450 can be configured in a UE (such as...) Figure 3 UE 116) and BS (such as Figure 2Implemented in BS 102, it is used to communicate information via a networked computing system to determine the search space set for PDCCH monitoring in the UE.

[0172] although Figure 4A and Figure 4B An example of a wireless transmit and receive path is shown, but it is possible to modify it further. Figure 4A and Figure 4B Make various changes. For example, Figure 4A and Figure 4B The various components can be combined, further subdivided, or omitted, and other components can be added as needed. Additionally, Figure 4A and Figure 4B This example illustrates the types of transmit and receive path types that can be used in a wireless network. Any other suitable architecture can be used to support wireless communication in a wireless network.

[0173] Figure 5 Exemplary transmitters according to various embodiments of the present disclosure are shown. Transmitter 500 may be implemented in an electronic device (such as gNB 101 or UE 111) that communicates via a networked computing system.

[0174] Information bits 510 (such as DCI bits or data bits) are encoded by encoder 520, and then rate matched to the allocated time / frequency resources by rate matcher 530. The output from rate matcher 530 is modulated by modulator 540. SC mapping unit 560 maps the modulated and encoded symbols 545 and DMRS or CSI-RS 550 based on the SC selected by BW selector unit 565. Inverse Fast Fourier Transform (IFFT) is performed by IFFT unit 570, and a cyclic prefix (CP) is added by insertion unit 580. The resulting signal is filtered by filter 590 to generate a filtered signal 595, which is transmitted by radio frequency (RF) unit (not shown).

[0175] Figure 6 Exemplary receivers according to various embodiments of the present disclosure are shown. Receiver 600 may be implemented in an electronic device (such as gNB 101 or UE 111) that communicates via a networked computing system.

[0176] The received signal 610 is filtered by filter 620, and then passes through CP removal unit 630 for removing cyclic prefixes. IFFT unit 640 applies Fast Fourier Transform (FFT) and provides the resulting signal to SC demapping unit 650. SC demapping unit 650 demaps the SC selected by BW selector unit 655. The received signal is demodulated by channel estimator and demodulator unit 660. Rate dematcher 670 restores rate matching, and decoder 280 provides information bits 290 from the decoded bits.

[0177] Each of gNBs 101 to 103 may implement a transmitter 400 for transmitting to UEs 111 to 116 in the downlink and a receiver 600 for receiving from UEs 111 to 116 in the uplink. Similarly, each of UEs 111 to 116 may implement a transmitter 400 for transmitting to gNBs 101 to 103 in the uplink and a receiver 600 for receiving from gNBs 101 to 103 in the downlink.

[0178] As described in more detail below, transmitter 500 and receiver 600 may be included in UE and BS (such as UE 116 and BS 102) for communicating information via a networked computing system to determine a search space set for PDCCH monitoring in the UE.

[0179] Figure 5 and Figure 6 Each of the components can be implemented using hardware alone or using a combination of hardware and software / firmware. As a specific example, Figure 5 and Figure 6 At least some of the components can be implemented in software, while others can be implemented in configurable hardware or a combination of software and configurable hardware. For example, IFFT block 570 can be implemented as a configurable software algorithm.

[0180] Furthermore, although described as using IFFT, this is merely illustrative and should not be construed as limiting the scope of this disclosure. Other types of transforms, such as the Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions, may be used.

[0181] although Figure 5 and Figure 6 An example of a wireless transmitter and receiver is shown, but various modifications can be made. For example, Figure 5 and Figure 6 The various components can be combined, further subdivided, or omitted, and other components can be added as needed. Additionally, Figure 5 and Figure 6This section aims to illustrate examples of transmitter and receiver types that can be used in wireless networks. Any other suitable architecture can be used to support wireless communication in a wireless network.

[0182] Figure 7 An exemplary encoding flowchart of the DCI format according to various embodiments of the present disclosure is shown. Encoding flow 700 can be implemented in a BS (such as...) Figure 2 Implemented in gNB 102).

[0183] The gNB encodes and transmits each DCI format separately in the corresponding PDCCH. Where applicable, the CRC of the DCI format codeword is masked with the RNTI of the UE to which the DCI format is targeted, so that the UE can recognize the DCI format. For example, the CRC may include 16 bits or 24 bits, and the RNTI may include 16 bits or 24 bits. Otherwise, when the RNTI is not included in the DCI format, the DCI format type indicator field may be included in the DCI format. The CRC calculation unit 720 is used to determine the CRC of the non-encoded DCI format information bits 710, and the XOR operation unit 730 is used to mask the CRC between the CRC bits and the RNTI bits 740. The XOR operation is defined as XOR(0,0)=0, XOR(0,1)=1, XOR(1,0)=1, XOR(1,1)=0. The masked CRC bits are appended to the DCI format information bits using the CRC append unit 750. The channel encoder 760 performs channel coding (such as tail-bit convolutional code or polar code), which is then rate-matched to the allocated resources by the rate matcher 770. The interleaver and modulator unit 780 applies interleaving and modulation (such as QPSK) and transmits the output control signal 790.

[0184] Figure 8 An exemplary decoding flowchart of a DCI format according to various embodiments of the present disclosure is shown. Decoding process 800 can be performed at a UE (such as...) Figure 3 Implemented in UE 116).

[0185] The received control signal 810 is demodulated and deinterleaved by the demodulator and deinterleaver 820. The rate match applied at the transmitter is restored by the rate matcher 830, and the resulting bits are decoded by the decoder 840. After decoding, the CRC extractor 850 extracts the CRC bits and provides DCI format information bits 860. The DCI format information bits are demasked by the XOR operation unit 870 and RNTI 880 (where applicable), and a CRC check is performed by the CRC unit 890. When the CRC check is successful (checksum is zero), the DCI format information bits are considered valid (at least when the corresponding information is valid). When the CRC check fails, the DCI format information bits are considered invalid.

[0186] As described in more detail below, the encoding process 700 and the decoding process 800 can be implemented in the BS and UE (such as...) respectively. Figure 2 BS 102 and Figure 3 Implemented in UE 116) to determine the search space set for PDCCH monitoring in the UE by communicating information through the networked computing system.

[0187] Determine PDCCH allocation

[0188] Implementations of this disclosure consider determining a PDCCH allocation that can support multicast data and control messages to a group of UEs. Determining the PDCCH allocation includes the search space available for multicasting data and control messages to a group of UEs, the specifications of the search space set / CORESET, and its configuration. The search space set for multicasting data and control messages to a group of UEs can be a shared search space (CSS) set as defined in REF 3 or a new search space set referred to herein as the UE Group Search Space (UGSS). PDCCH allocation also includes determining candidate PDCCHs and non-overlapping CCEs for each PDCCH monitoring timing when supporting the search space for multicast data and control messages.

[0189] For a search space set s (e.g., CSS set or UGSS set) associated with CORESET p that supports multicasting data or control messages to a set of UEs, for the carrier indicator field value n CI (Also known as the search space) corresponding service cell, time slot Candidate PDCCH in the search space set The corresponding CCE index for aggregation level L is given in Equation 2:

[0190]

[0191] in:

[0192]

[0193] Y p，-1 =n RNTI ≠0;

[0194] A p =39827 for pmod3=0;

[0195] A p =39829 for pmod3=1;

[0196] A p =39839 for pmod3=2;

[0197] D = 65537;

[0198] i = 0, ..., L-1;

[0199] N CCE,p This refers to the number of CCEs in CORESET p, numbered from 0 to N. CCE,p -1;

[0200] If the UE is configured with a carrier indicator field, then n CI It is the value of the carrier indicator field; otherwise, including for any CSS, n CI =0;

[0201] in The UE is configured to target n CI The number of candidate PDCCHs monitored at the aggregation level L of the serving cell corresponding to the search space set s;

[0202] It is a CCE aggregation level L that traverses all n configurations of the search space set s within the control resource set p. CI Maximum value as well as

[0203] For n RNTI The RNTI value is an RNTI used to scramble the associated DCI format CRC monitored in the search space, such as the M-RNTI or G-RNTI discussed in the embodiments of this disclosure for the “Determination of PDCCH Allocation” and “Group Shared PDCCH for Multicast in DL” embodiments.

[0204] A set of candidate PDCCHs to be monitored by the UE can be defined relative to a PDCCH search space set (e.g., a CSS set or an UGSS set). The UE can be configured to monitor up to N^SS_max >= 1 search space set, where the search space set can be a CSS set or an UGSS set. N^SS_max can be predefined in the system operation specification such that N^SS_max = 10, or provided to the UE separately via UE-specific higher-layer signaling after the UE establishes an RRC connection. The UE can monitor the DCI format used for multicast data or control messages in any of the search space sets. The UE can determine the configuration of the search space set through either of the following two examples.

[0205] In one example, the search space set can be provided to the UE via RRC signaling in a PDSCH scheduled in DCI format with a CRC scrambled by SI-RNTI. The search space set configured via the System Information Block (SIB) can be referred to as the initial space set, which is shared by all UEs within the cell. The initial search space set can be a CSS set or an UGSS set.

[0206] In another example, the configuration can be provided to the UE via RRC signaling in the PDSCH scheduled from the DCI format detected in the PDCCH received from a pre-configured search space set (e.g., an initial shared search space set configured by the SIB). An RNTI for the DCI format that the UE attempts to detect by monitoring the PDCCH in the pre-configured search space set can be provided to the UE.

[0207] Figure 9 A flowchart illustrating the configuration of a search space set determined from a DCI-formatted PDSCH according to various embodiments of the present disclosure is shown. The operation of process 900 can be performed on a UE (such as...) Figure 3 Implemented in UE 116).

[0208] In operation 902, the configuration of the initial search space set is obtained via the SIB. The SIB can be obtained from the PDSCH scheduled in DCI format with a CRC scrambled by the SI-RNTI. In operation 904, the RNTI (e.g., M-RNTI) is obtained via dedicated / UE-specific signaling for monitoring the PDCCH in the initial search space set.

[0209] In operation 906, the PDCCH is monitored in the initial search space set. In operation 908, it is determined whether a DCI format with a CRC scrambled by M-RNTI is detected. If no DCI format with a CRC scrambled by M-RNTI is detected, process 900 returns to operation 906 to continue monitoring. However, if it is determined in operation 908 that a DCI format with a CRC scrambled by M-RNTI is detected, process 900 proceeds to operation 910 to decode the PDSCH scheduled in the DCI format to obtain configuration information for another search space set (such as a new CSS set, a new UGSS set, or a previously configured search space set).

[0210] For each DL BWP configured for a UE in the serving cell, up to N_CORESETs_max >= 1 CORESET can be provided to the UE via higher-layer signaling, associated with the CSS set used for PDCCH monitoring. N_CORESETs_max can be fixed and defined in the system operation specification such that N_CORESETs_max = 3, or it can be indicated by system information. For each CORESET, the UE can be provided with any parameters regarding the CORESET configuration (as defined in REF 3) and any of the following:

[0211] DM-RS scrambling sequence initialization value N ID If N is not provided ID Then N can be determined based on the group CSS set ID I_group.ID ; and

[0212] For the information of the TCI state cycle for N_MO >= 1 PDCCH monitoring occasions, including a list of N >= 1 TCI-states, L_TCI = {TCI-state_0, TCI-state_1, ……, TCI-state_N-1}, where the TCI state indicates the quasi-co-location (QCL) information of the DM-RS antenna ports for PDCCH reception in the corresponding CORESET; the index of the first TCI state applying I_startTCI (0 <= I_startTCI < N) from L_TCI; and the TCI state cycle interval N^MOs_TCI (1 <= N^MOs_TCI <= N) with respect to the number of consecutive PDCCH monitoring occasions. For example, the UE may assume that the TCI state for the PDCCH monitoring occasion with index i (i = 0, ……, N_MOs-1) has a TCI state with index j (0 <= j < N) from L_TCI, such that j = floor(i / N^MOs_TCI) + I_startTCI.

[0213] For a CORESET associated with a search space set, if the configuration of the TCI state list L_TCI of the CORESET has not been provided to the UE, the UE may assume that the DM-RS antenna port associated with the i-th PDCCH reception is quasi-co-located with the i-th SS / PBCH block in the associated active BWP. If the configuration of the TCI state list L_TCI has been provided to the UE, the UE may receive a MAC CE to indicate the new start TCI state applying I_startTCI and / or the TCI cycle interval N^MOs_TCI. If the UE receives a MAC CE command to update the first TCI state and / or the TCI cycle interval, the UE applies the command N_delay milliseconds after the slot in which the UE transmits the corresponding HARQ-ACK information for the PDSCH that provided the command in the PUCCH. N_delay may be defined in the system operation specification (e.g., N_delay = 3 milliseconds) and may be expressed as the number of PUCCH slots.

[0214] Figure 10 shows a flowchart for determining the TCI state of a CORESET associated with PDCCH monitoring according to various embodiments of the present disclosure. The operations of process 1000 may be implemented in a UE (such as Figure 3 UE 116 therein).

[0215] In operation 1002, obtain the configuration of the CORESET associated with the search space set for monitoring the PDCCH.

[0216] In operation 1004, it is determined whether the configuration includes information about TCI state cycling, such as the TCI state list L_TCI, the first TCI state applying I_startTCI, and the TCI state cycling interval N^MOs_TCI, to monitor the PDCCH at multiple PDCCH monitoring times. If the configuration includes information related to TCI state cycling, the UE then determines in operation 1006 whether the UE has received a MAC CE command indicating the start of updating the first TCI state to be applied. If a MAC CE command indicating the update of the first TCI state to be applied is received, then procedure 1000 proceeds to operation 1008, where the TCI state cycles through multiple consecutive PDCCH monitoring times with the first TCI state indicated by the MAC CE command and the cycling interval. For example, the UE cycles the TCI state every N^MOs_TCI PDCCH monitoring times, starting from the first TCI state applying I_startTCI, where N^MOs_TCI and I_startTCI are indicated by the MAC CE command.

[0217] Returning to operation 1004, if it is determined that the configuration does not include information about the TCI state cycle, then process 1000 proceeds to operation 1010, where the timing of the i-th PDCCH monitoring coincides with the i-th SS / PBCH block in the active DL BWP.

[0218] Returning to operation 1006, if it is determined that no MAC CE command indicating the start of a new TCI state or the TCI state cycle interval has been obtained, then process 1000 proceeds to operation 1012, starting from the first TCI state with I_startTCI applied, and cycling the TCI state every N^MOs_TCI PDCCH monitoring times, where N^MOs_TCI and I_startTCI are indicated by configuration.

[0219] Multiple search space sets (e.g., multiple CSS sets) can be bound together to form a group with the ID denoted as I_group. For a DL BWP configured for a UE in the serving cell, the UE can be associated with up to N^groups of search space sets, where each search space set is associated with at least one search space set. N^groups can be fixed and predefined in the system operation specification, such that N^groups = 3 or N^groups = 2. The UE can determine the associated search space set group ID I_group by one of the following two examples:

[0220] In the first example, the I_group can be provided to the UE via UE-specific higher-layer signaling. The ID of the corresponding CSS set associated with this group can be provided to the UE along with the I_group. The UE ID associated with the search space set group I_group, I^UE_ID, can be provided to the UE.

[0221] In the second example, I_group can be derived from the UE ID, I^UE_ID. For example, I_group = mod(floor(I^UE_ID / c1), c2), where c1 and c2 are integers and can be defined in the system operation specification (e.g., c1 = 1, c2 = 8), or provided to the UE via higher-level signaling. For example, either c1 or c2 can be the number of UE groups configured by the gNB.

[0222] In a sub-example of the second example, I^UE_ID can be the International Mobile Subscriber Identity (IMSI).

[0223] In another sub-example of the second example, I^UE_ID can be an SAE Temporary Mobile Subscriber Identity (s-TMSI).

[0224] In yet another sub-example of the second example, I^UE_ID can be C-RNTI.

[0225] Multiple search space sets (e.g., multiple UGSS sets) can be associated with a UE group denoted as I_UG. For a DL BWP configured for a UE in the serving cell, a UE can be associated with up to N^UGs UE groups, where each UE group is associated with at least one search space set. N^UGs can be fixed and predefined in the system operation specification such that N^UGs = 3. The UE can determine the associated UE group ID, I_UG, through one of the following two examples:

[0226] In the first example, I_UG can be provided to the UE via UE-specific higher-layer signaling. The ID of the corresponding search space set associated with this group can be provided to the UE along with I_UG. The UE ID within the UE group I_UG, I^UE_ID, can be provided to the UE.

[0227] In the second example, I_group can be derived from the UE ID, I^UE_ID. For example, I_group = mod(floor(I^UE_ID / c1), c2), where c1 and c2 are integers and can be defined in the system operation specification (e.g., c1 = 1, c2 = 8), or provided to the UE via higher-level signaling. For example, either c1 or c2 can be the number of UE groups configured by the gNB.

[0228] In one sub-example of the second example, I^UE_ID can be an International Mobile Subscriber Identity (IMSI);

[0229] In another sub-example of the second example, I^UE_ID can be an SAE Temporary Mobile Subscriber Identity (s-TMSI);

[0230] In yet another sub-example of the second example, I^UE_ID can be C-RNTI.

[0231] For the search space set, the UE can be provided with any parameters regarding the search space configuration (as defined in REF 3) and any of the following configurations:

[0232] The associated search space group ID, I_group;

[0233] The associated UE group ID, I_UG;

[0234] The search space type can be USS, CSS, or UGSS;

[0235] Indicators for the DCI format of candidate PDCCHs in the search space set, such as monitoring DCI format_X_0, which can be the smallest DCI format used by the UE to monitor the PDCCH and carried by the PDCCH in the CSS set.

[0236] The repetition indicator I_rep, where I_rep can be a binary bit of a bitmap to indicate whether a PDCCH monitoring opportunity from multiple consecutive PDCCH monitoring opportunities within a PDCCH monitoring period is used to repeat a PDCCH with the same DCI format ("0" value or "1" value); and

[0237] For any of CCE aggregation levels L: 1, 2, 4, 8, 16, 32, and 64, the number of candidate PDCCHs per CCE aggregation level L. These are aggregationLevel1, aggregationLevel2, aggregationLevel4, aggregationLevel8, aggregationLevel16, aggregationLevel32, and aggregationLevel64, respectively. Compared to the USS set or the CSS set configured by higher-level signaling specific to the UE, the CSS / UGSS set can consider higher aggregation levels (such as CCE aggregation level 32 or 64) or a greater number of candidate PDCCHs.

[0238] For a configured search space set, it can be enabled or disabled via L1 signaling (such as DCI format) or higher-level signaling (such as MAC CE commands). To reduce signaling overhead, one of the following methods can be considered.

[0239] In the first method, search space sets associated with search space set group I_group can be enabled (disabled) simultaneously. For example, a MAC CE deactivation command can be given to the UE to disable all search space sets associated with search space set group I_group. If the UE receives a MAC CE command to enable (disable) one or all CSS sets associated with search space set group I_group, the UE applies the command N_delay milliseconds after the slot in which the UE sends HARQ-ACK information for the PDSCH providing the command. N_delay can be defined in the system operation specification (e.g., N_delay = 3 milliseconds) and can be the number of PUCCH transmission slots. If the UE receives an L1 signal / channel to enable (disable) a search space set or all search space sets associated with search space set group I_group, the UE applies adaptation N_delay milliseconds or the slot after the slot in which the UE receives the adaptation request. N_delay can be defined in the system operation specification (e.g., N_delay = 1 or 2).

[0240] In the second method, the search space set associated with UE group I_UG can be enabled (disabled) simultaneously. For example, a MAC CE deactivation command can be given to the UE to disable all search space sets associated with UE group I_UG. If the UE receives a MAC CE command to enable (disable) the search space set associated with UE group I_UG or all search space sets, the UE applies the command N_delay milliseconds after the slot in which the UE sends HARQ-ACK information for the PDSCH providing the command. N_delay can be defined in the system operation specification (e.g., N_delay = 3 milliseconds) and can be the number of PUCCH transmission slots. If the UE receives an L1 signal / channel to enable (disable) the search space set associated with UE group I_UG or all search space sets, the UE applies adaptation N_delay milliseconds or the slot after the slot in which the UE receives the adaptation request. N_delay can be defined in the system operation specification, for example, N_delay = 1 or 2.

[0241] Figure 11 A flowchart illustrating a monitoring search space set according to various embodiments of the present disclosure is shown. The operation of process 1100 can be performed on a UE (such as...) Figure 3 Implemented in UE 116).

[0242] Process 1100 begins with operation 1102, which obtains one or more configurations of the search space set for PDCCH monitoring via higher-level signaling.

[0243] In operation 1104, it is determined whether a MAC CE command to disable a set of search space sets associated with search space set group ID I_group has been received. If a MAC CE command to disable a set of search space sets associated with search space set group ID I_group is received, the process proceeds to operation 1106, where monitoring of all search space sets associated with I_group is stopped and the corresponding configuration is discarded. In a non-limiting implementation, when the UE receives a MAC CE command to disable search space set group I_group, the UE may stop monitoring all search space sets associated with I_group for N_delay milliseconds after the time slot in which the UE sends a PUCCH with HARQ-ACK information for the PSDCH providing the disable command.

[0244] Process 1100 continues to operation 1108, continuing to monitor PDCCH within the configured still active search space set.

[0245] Returning to operation 1104, if no MAC CE command is obtained to disable a set of search spaces associated with group ID I_group, process 1100 proceeds directly from operation 1104 to operation 1108.

[0246] Regarding blind decoding during each PDCCH monitoring timing in each scheduling cell, it is not required that the UE monitor more than [number missing] times per slot on the active DL BWP with SCS configuration μ in the scheduling cell. There are more than 10 candidate PDCCHs Non-overlapping CCEs, among which and These are the maximum number of candidate PDCCHs and the maximum number of non-overlapping CCEs monitored per slot for a DL BWP with SCS configuration μ, as defined in REF 3. Furthermore, and These are, respectively, the total number of candidate PDCCHs monitored per slot in a DL BWP with SCS configuration μ and the total number of non-overlapping CCEs in the configured active search space set, as defined in REF3. For all active search space sets within a slot, S... CSS Indicates a base of I CSS A set of CSS, by S USS Indicates a base of J USS A set of USS, and by S UGSS Indicates a base of J UGSS A set of UGSS. USS set S j (0≤Sj ≤J USS In S USS The positions within the search space set are sorted in ascending order based on the search space set index. UGSS set S j (0≤S k <J UGSS In S UGSS The positions in the search space set are sorted in ascending order based on the search space set index. This refers to the CSS set S css (i) The number of candidate PDCCHs configured (0≤i<i) css ),as well as (0≤j<J uss ) indicates that the USS set S uss (j) The number of candidate PDCCHs configured. For the CSS set, the total number of PDCCHs required for UE monitoring in time slots is... Non-overlapping CCEs One candidate PDCCH. (0≤k<I UGSS ) indicates that for the UGSS set S UGSS (k) The number of candidate PDCCHs configured, and (0≤k<J UGSS ) indicates that the UGSS set S UGSS (k) The number of candidate PDCCHs configured. For the UGSS set, the total number of PDCCHs required for UE monitoring in time slots is [number missing]. Non-overlapping CCEs There are candidate PDCCHs. In time slot n, for the primary cell with an active DL BWP and SCS configuration μ, the UE assigns the monitored candidate PDCCHs to the USS set according to the following pseudocode. The UE does not expect to monitor PDCCHs in the USS set without monitoring candidate PDCCHs. V CCE (S USS (j) represents the search space set S. USS (j) non-overlapping CCE sets, and V represents CCE (S USS (j) is the cardinality of the search space set S, where S is used to search the space set S. USS (j) The non-overlapping CCE takes into account the candidate PDCCH monitored for the active CSS set and the monitored search space set S for all activities. USS The candidate PDCCH is determined by (k), 0≤k<j.

[0247] The pseudocode mentioned earlier is as follows:

[0248] set up

[0249] set up

[0250] Set j=0

[0251] when and hour,

[0252] Will Each monitored candidate PDCCH is assigned to the USS set S uss (j);

[0253]

[0254]

[0255] j = j + 1;

[0256] end while.

[0257] Group-shared PDCCH for multicast in DL

[0258] Another embodiment of this disclosure considers the type of PDCCH (e.g., CSS or UGSS) that a UE monitors in the search space and provides the DCI format for scheduling PDSCH multicast to a group of UEs. In this disclosure, this type of PDCCH is referred to as Type 1-PDCCH. Type 1-PDCCH can be monitored at least for UEs in the RRC_CONNECTED state.

[0259] A higher layer may provide the UE with an RNTI that scrambles the DCI format transmitted in the Type 1-PDCCH using CRC. In this disclosure, this RNTI is referred to as the M-RNTI. The UE can determine the M-RNTI associated with the Type 1-PDCCH through one of the following examples:

[0260] In one example, M-RNTI can be provided to the UE via UE-specific / dedicated RRC signaling;

[0261] In another example, M-RNTI can be provided to the UE via shared RRC signaling, for example, in the system information, or, for example, in the TB via multicast PDSCH scheduled by Type 1-PDCCH; and

[0262] In yet another example, M-RNTI can be provided to the UE in the PDSCH via MAC CE.

[0263] Figure 12 A flowchart illustrating the reception of a multicast TB scheduled by a Type 1-PDCCH in a search space set t according to various embodiments of the present disclosure is shown. The operation of process 1200 can be performed at a UE (such as...) Figure 3Implemented in UE 116).

[0264] Process 1200 begins with operation 1202, obtaining the configuration of the search space set used to monitor Typ1_PDCCH and M-RNTI. In a non-limiting implementation, the configuration of the search space set is either a CSS set or UGSS.

[0265] In operation 1204, monitoring of the DCI format with a CRC scrambled by M-RNTI is performed. In operation 1206, it is determined whether a DCI format with a CRC scrambled by M-RNTI is detected. If no DCI format with a CRC scrambled by M-RNTI is detected, process 1200 returns to operation 1204. However, if a DCI format with a CRC scrambled by M-RNTI is detected, process 1200 proceeds to operation 1208, decoding the multicast PDSCH scheduled by the DCI format. In one implementation, the UE decodes the TB in the scheduled PDSCH based on the DL allocation / grant from the detected DCI format.

[0266] The DCI format with a CRC scrambled by M-RNTI used to schedule PDSCH via Type 1-PDCCH in the search space set may include any field in DCI format 1_0 or DCI format 1_1 in REF 2, as well as any one of the following five fields.

[0267] The first field is the number of recurring multicast PDSCHs, N_rep. N_rep indicates that the TBs in the scheduled PDSCHs are repeated in N_rep slots. The N_rep slots can be consecutive (such as for FDD operations) or discontinuous (such as for TDD operations), where higher-layer configurations based on multiple time-repeated slots are skipped without including multiple DL symbols for PDSCH reception as indicated by the DCI format.

[0268] The second field is the carrier indicator field n. CI If the UE is configured with a carrier indicator field, then it is the carrier indicator field value.

[0269] The third field is the redundant version (RV) of the first repetition I_RV_first, which can be 2 bits and indicates a value from a predetermined list, for example, L_RV = {0, 1, 2, 3}. The index of the RV of the i-th repetition from the list can be floor(i / 4) + I_RV_first. Optionally, the first repetition can always be sent along with the first RV from the list (i.e., 0), and the corresponding indication can be omitted in the DCI format.

[0270] The fourth field is the TB count n_TB. n_TB = 0, 1, ..., N_TBs-1, where N_TBs is the maximum value of the TB count, and N_TBs can be provided to the UE through higher-layer signaling or defined in the system operation specification, for example, N_TB = 8.

[0271] The fifth field is the HARQ feedback type, n_harq_type. n_harq_type can be a binary value to indicate whether the UE needs to provide a positive acknowledgment (ACK) or a negative acknowledgment (NACK) message. Optionally, this indication can be provided to the UE via higher-layer signaling.

[0272] For HARQ-ACK feedback, the UE can send a sequence d(n) to indicate a positive acknowledgment (ACK) or a negative acknowledgment (NACK) respectively in response to the detection of a success or failure of a TB in the scheduled PDSCH. This sequence can be defined as shown in REF 1. The low PAPR sequence, where u and v are the group number and base sequence number within the group, respectively. The UE can determine u and v through one of the following two examples.

[0273] In the first example, u and v can be associated with the UE ID, I_UE. For example, v = mod(I) UE c1, c2, and c3 are integers, for example, c1 is the number of base sequences in each sequence group, c2 = 1, and c3 = 0.

[0274] In one sub-example of the first example, I^UE could be an International Mobile Subscriber Identity (IMSI).

[0275] In another sub-example of the first example, I^UE could be an SAE Temporary Mobile Subscriber Identity (s-TMSI);

[0276] In yet another sub-example of the first example, I^UE can be C-RNTI.

[0277] In yet another sub-example of the first example, I^UE can be provided to the UE via higher-level signaling along with the group ID of the CSS set, I_group.

[0278] In the second example, u and v can be associated with C-RNTI. For example, v = mod(n) rnti c1, c2, and c3 are integers, for example, c1 is the number of base sequences in each sequence group, c2 = 1, c3 = 0, and n rnti It is C-RNTI.

[0279] The time slot n used for UE feedback ACK or NACK information can be determined by dynamic K1 in the scheduling DCI, such that n = n_PDSCH + K1, where n_PDSCH is the index of the previous / first time slot.

[0280] Figure 13 A flowchart illustrating various embodiments of the present disclosure for transmitting HARQ-ACK information for multicast TB based on Type 1-PDCCH within a search space set is shown. The operation of flowchart 1300 can be performed at a UE (such as...) Figure 3 Implemented in UE 116).

[0281] Process 1300 begins with operation 1302, which detects the DCI format with CRC scrambled by M-RNTI for scheduling PDSCH in the search space set (e.g., CSS set or UGSS set).

[0282] In operation 1304, it is determined whether decoding of the scheduled PDSCH has failed. If decoding of the scheduled PDSCH has failed, process 1300 proceeds to operation 1306, where a low PAPR sequence is sent to feedback NACK if indicated by the DCI format. When the UE is indicated by the detected DCI format or configured by a higher layer to send NACK when the UE fails to decode the TB in the scheduled PDSCH, the UE then sends a sequence in slot n to indicate NACK, such that n = n_PDSCH + K1, where n_PDSCH is the first / previous scheduled PDSCH repetition, and K1 is the time offset indicated in the DCI format or configured by a higher layer.

[0283] If decoding of the scheduled PDSCH has not yet failed, process 1300 proceeds to operation 1308, where a low PAPR sequence is sent to provide feedback for HARQ-ACK, if indicated by the DCI format. When the UE is indicated by the detected DCI format or configured by a higher layer to send an ACK upon successful decoding of the TB in the scheduled PDSCH, the UE sends a sequence in slot n to indicate the ACK, such that n = n_PDSCH + K1, where n_PDSCH is the first / previous scheduled PDSCH repetition and K1 is the time offset indicated in the DCI format.

[0284] Group shared PDCCH for control signaling

[0285] Another embodiment of the present disclosure contemplates the type of PDCCH monitored in a search space (e.g., CSS or UGSS) for multicasting common control information to a UE. In the present disclosure, this type of PDCCH is referred to as Type2-PDCCH. The control information can be used at least to trigger adaptation of transmissions or receptions configured for the UE, e.g., such as to indicate a switch in an energy saving state / mode, where multiple energy saving states / modes can be pre-configured via higher layer signaling or to trigger the UE to enter a sleep state or skip PDCCH monitoring for a period of time. Type2-PDCCH can be monitored at least for UEs in the RRC_CONNECTED state.

[0286] The RNTI for CRC scrambling of the DCI format provided by the Type2-PDCCH can be configured for the UE by a higher layer. In the present disclosure, this RNTI is referred to as G-RNTI. It is 0 < G-RNTI < 2^N_bits - 1, where N_bits is the size of the G-RNTI, and N_bits can be defined in the system operation specification, e.g., N_bits = 16 or 24, or provided to the UE via higher layer signaling. The G-RNTI associated with Type2-PDCCH monitoring can be provided to the UE in one of the following three examples. <000...​​​​​​​​​​​​​​​The short message only field (shortMessageOnly) may contain a binary value indicating to the UE whether the control information in the DCI format is scheduled for PDSCH reception or PUSCH transmission. When the DCI format only provides control information without scheduling PDSCH reception or PUSCH transmission, the UE can always process the control information in the DCI format. Otherwise, when the DCI format schedules PDSCH reception, the UE receives the PDSCH and processes the control information and the TB (Transmission Target). In one example, the scheduled TB may indicate a subset of the UE group monitoring the DCI format as applicable UEs requiring the application of the adaptation request indicated by the control information. In this case, the UE ID (I^UE) may be carried in the TB of the scheduled PDSCH.

[0293] In one implementation, I^UE can be an International Mobile Subscriber Identity (IMSI). In another implementation, I^UE can be an SAE Temporary Mobile Subscriber Identity (s-TMSI). In yet another implementation, I^UE can be a C-RNTI. In yet another implementation, I^UE can be provided to the UE via higher-layer signaling along with the group ID of the CSS set, I_group.

[0294] Frequency domain resource allocation fields can have This bit. If the DCI format only provides short messages, this bit field is reserved or can be reinterpreted for another purpose. It is the size (in RB) of the associated CORESET for PDCCH reception or the active DL BWP for the UE.

[0295] The time-domain resource allocation field may have 4 bits as defined in subclause 5.1.2.1 of REF 4. If the DCI format only provides short messages, this bit field is reserved or may be reinterpreted for another purpose.

[0296] According to Table 7.3.1.1.2-33 in REF 2, the VRB to PRB mapping field may have one bit. If the DCI format only provides short messages, this bit field is reserved or can be reinterpreted for another purpose. Alternatively, the mapping may be predetermined and the field may not exist.

[0297] The modulation and coding scheme field may have 5 bits as defined in Table 5.1.3.1-1 in sub-clause 5.1.3 of REF 4, or another configurable number of bits. If the DCI format only provides short messages, this bit field is reserved or may be reinterpreted for another purpose.

[0298] The TB adjustment field may have 2 bits as defined in sub-clause 5.1.3.2 of REF 4. If the DCI format is only used for short messages, this bit field is reserved or may be reinterpreted for another purpose.

[0299] Figure 14 A flowchart illustrating the reception of control information based on Type 2-PDCCH within a search space set according to various embodiments of the present disclosure is shown. The operation of process 1400 can be performed at a UE (such as...) Figure 3 Implemented in UE 116).

[0300] Procedure 1400 begins with operation 1402, obtaining the configuration of the search space set for monitoring Type 2-PDCCH and the corresponding RNTI. The configuration of the search space set can be a CSS set or UGSS set for monitoring Type 2-PDCCH and the corresponding RNTI (e.g., G-RNTI). In operation 1404, monitoring is performed on the DCI format with a CRC scrambled by the G-RNTI.

[0301] In operation 1406, it is determined whether a DCI format with a CRC scrambled by G-RNTI is detected. If no DCI format with a CRC scrambled by G-RNTI is detected, process 1400 returns to operation 1404. However, if a DCI format with a CRC scrambled by G-RNTI is detected, process 1400 proceeds to operation 1408, whereby it is determined whether the DCI format only provides short messages.

[0302] If it is determined in operation 1408 that the DCI format only provides short messages, then process 1400 proceeds to operation 1410 to perform the adaptation indicated by the control information. However, if it is determined that the DCI format does not only provide short messages, then process 1400 proceeds to operation 1412 to decode the scheduled PDSCH. In one embodiment, the DCI format does not only provide short messages when providing both short messages and scheduling information.

[0303] In operation 1414, it is determined whether the UE is one of the applicable UEs indicated by the decoded PDSCH (i.e., whether the information in the decoded TB in the PDSCH applies to the UE). If the UE is one of the applicable UEs indicated by the decoded PDSCH, i.e., the information in the decoded TB indicates that the control information in the DCI format applies to the UE, then procedure 1400 proceeds to operation 1418 to perform the adaptation indicated in the control information. However, if the UE is not one of the applicable UEs indicated by the decoded PDSCH, then procedure 1400 proceeds to operation 1416, and the adaptation request indicated in the DCI is ignored.

[0304] Transmission enhancement scheme

[0305] Another embodiment of this disclosure considers enhancing PDCCH transmission in a search space set (e.g., a CSS set or a UGSS set), including support for repetitive and multi-beam operation as well as multi-slot scheduling.

[0306] The UE is configured to monitor the PDCCH within a search space set. The UE can determine the timing of PDCCH monitoring on the active DL BWP using configuration information of the associated search space set, including the PDCCH monitoring period within the time slot, the PDCCH monitoring offset, and the PDCCH monitoring mode. If Then the UE determines that the PDCCH monitoring opportunity in the search space set s exists in the position numbered n. f The frame number is In the time slot (REF 1). When the UE is configured to monitor the DCI format in the search space set s for a duration Ts, the UE starts in the time slot The DCI format in the Ts consecutive time slot monitoring search space set s, and in the subsequent k s -T s The DCI format in the search space set s is not monitored in a continuous time slot.

[0307] The UE can determine the duration T based on the configured duration. s Given the PDCCH monitoring patterns within the time slots of the associated search space set s, determine the number of PDCCH monitoring opportunities N_MOs in the search space set for each PDCCH monitoring cycle, such that N_MOs = T s *N^MOs_slot, where N^MOs_slot is the number of PDCCH monitoring opportunities within a slot indicated by the configured PDCCH monitoring mode or the number of start OFDM symbols within a slot associated with the search space set s.

[0308] When the number of PDCCH monitoring opportunities N_MOs within a cycle is greater than 1, the UE can only expect the same DCI format content to be transmitted within N_MOs PDCCH monitoring opportunities. In multi-beam operation, the UE can determine the QCL assumption (CORESET TCI state) for N_MOs>1 PDCCH monitoring opportunities using one of the following three examples.

[0309] In the first example, the UE may assume that the TCI state of the CORESET of the PDCCH transmission with DCI format changes every C1 monitoring time within the PDCCH cycle. In this case, at most The different TCI states can be transparent to the UE. Optionally, higher-layer signaling can be used to provide the UE with... A list of TCI states to indicate when PDCCH monitoring should be performed. QCL hypotheses for subsets, where the i-th subset comes from the list (i = 0, 1, ..., ... The TCI status indicator has at most C1 monitoring opportunities for the i-th time (i = 0, 1, ..., ...). The QCL assumption for the subset. C1 is a positive integer and can be defined in the specification (e.g., C1 = 1) or provided to the UE via higher-level signaling.

[0310] In the second example, the UE may assume that every C1 monitoring opportunity within the PDCCH cycle, there is a TCI state cycle for the CORESET of the PDCCH transmission in DCI format. In this case, higher-layer signaling can be used to provide the UE with... A list of TCI states is provided, and the index I_0 of the first TCI state can be provided to the UE via higher-layer signaling. The UE can determine the i-th of up to C1 monitoring opportunities (i = 0, 1, ...) based on I_0. The QCL assumptions for a subset of (I_0+i) TCI states from this list indicate the QCL assumptions for the i-th subset of at most C1 monitoring opportunities. I_0 can be reconfigured by the MAC CE. C1 is a positive integer and can be defined in the specification (e.g., C1=1) or provided to the UE via higher-layer signaling.

[0311] In the third example, the UE may assume that N_MOs equals the number of SS / PBCH blocks actually transmitted as determined by ssb-PositionsInBurst in SIB1. The i-th PDCCH monitoring opportunity in the DCI format within the period corresponds to the i-th transmitted SS / PBCH block and is quasi-in-position (with the same TCI state) as the i-th transmitted SS / PBCH block. The QCL type between the i-th transmitted SS / PBCH block and the i-th PDCCH monitoring opportunity can be QCL-TypeA / QCL-TypeB / QCL-TypeC / QCL-TypeD and can be provided to the UE via higher-layer signaling.

[0312] DCI formats (such as those with CRC scrambled by M-RNTI) can be used to schedule N_TBs >= 1 TB within M_slots >= N_TBs. This scheme is called multi-slot scheduling. M_slots can be contiguous (e.g., for FDD operation) or discontinuous (e.g., for TDD operation), where higher-layer configurations based on multiple time-repeating slots are skipped without including slots for multiple DL symbols for PDSCH reception indicated by the DCI format. Either N_TBs or M_slots can be indicated by the DCI format or provided to the UE via higher-layer signaling.

[0313] For HARQ-ACK feedback in multi-slot scheduling, the UE can jointly send HARQ-ACK feedback to N_TBs TBs. In this case, when the UE is instructed to send NACK feedback via DCI format or higher-layer signaling, if the UE fails to decode any of the N_TBs, the UE sends NACK to the gNB. When the UE is instructed to send ACK feedback via DCI format or higher-layer signaling, the UE will only send ACK to the gNB if the UE correctly decodes all N_TBs TBs.

[0314] Figure 15 A flowchart illustrating the reception of multiple TBs scheduled in a DCI format according to various embodiments of this disclosure is shown. The operation of process 1500 can be performed at a UE (such as...) Figure 3 Implemented in UE 116).

[0315] Procedure 1500 begins with operation 1502, monitoring for DCI formats that support multi-slot scheduling. For example, the DCI formats in the search space set with CRCs scrambled by M-RNTI could be either the CSS set or the UGSS set. In operation 1504, it is determined whether a DCI format for scheduling N_TBs TBs across M_slots of time slots has been detected. If no DCI format supporting multi-slot scheduling is detected, procedure 1500 returns to operation 1502. However, if a DCI format supporting multi-slot scheduling is detected, i.e., a DCI format for scheduling N_TBs TBs across M_slots of time slots in the search space set, procedure 1500 proceeds to operation 1506, determining whether the N_TBs TBs in the PDSCH scheduled across M_slots of time slots have been correctly decoded.

[0316] If all N_TBs TBs in the scheduled PDSCH are correctly decoded, process 1500 proceeds to operation 1508, and a sequence of feedback ACKs is sent if indicated by the DCI format. When the UE is indicated by the detected DCI format or configured by a higher layer to send an ACK when all TBs in the scheduled PDSCH are successfully decoded, the UE sends a sequence in time slot n to indicate the ACK, such that n = n_PDSCH + K1, where n_PDSCH is the first / previous scheduled PDSCH for receiving N_TBs TBs, and K1 is the time offset indicated in the DCI format.

[0317] If, in operation 1506, it is determined that the UE cannot correctly decode any of the N_TBs TBs in the scheduled PDSCH, then procedure 1500 proceeds to operation 1510, where a sequence of feedback NACK is sent if indicated by the DCI format. When the UE is indicated by the detected DCI format or configured by a higher layer to send NACK when the UE cannot decode any of the TBs in the scheduled PDSCH, the UE then sends a sequence indicating NACK in time slot n, such that n = n_PDSCH + K1, where n_PDSCH is the first / previous scheduled PDSCH used to receive N_TBs TBs, and K1 is the time offset indicated in the DCI format or configured by a higher layer.

[0318] Determine the configuration of the active search space set.

[0319] Another embodiment of this disclosure considers determining the configuration of the active search space set when UE adaptation is enabled via physical layer signals / channels to monitor PDCCHs in the search space set. UE adaptation may at least involve enabling (disabling) the configured search space set; enabling (disabling) the CORESET; and updating one or more configuration parameters (such as CCE AL or candidate PDCCHs per CCE AL) for each search space set / CORESET. When an indication for enabling (disabling) a CORESET or search space set is provided by a DCI format, it is being monitored or detected in a search space set that cannot be disabled.

[0320] The UE can determine the search space set suitable for PDCCH monitoring adaptation triggered by physical layer signals / channels through one of the following exemplary methods.

[0321] In the first method for determining the search space set applicable to PDCCH monitoring adaptation triggered by physical layer signals / channels, the applicable search space set can be defined in the system operation specification. For example, for a DCI format with a CRC scrambled by C-RNTI, MCS-C-RNTI, SP-CSI-RNTI, or CS-RNTI, the applicable search space set can be any USS set configured by SearchSpace in PDCCH-Config as described in REF 5, where searchSpaceType = un-Specific. In another example, for a DCI format of a primary cell with a CRC scrambled by C-RNTI, MCS-C-RNTI, or CS-RNTI, the applicable search space set can be any Type3-PDCCH CSS set configured by SearchSpace in PDCCH-Config, where searchSpaceType = common.

[0322] In the second method for determining the search space set applicable to PDCCH monitoring adaptation triggered by physical layer signals / channels, the applicable search space set may be indicated by RRC signaling along with the configuration of the search space set or the associated CORESET. For example, the configuration of RRC parameters along with the search space set may indicate whether PDCCH monitoring in that search space set can be adapted via physical layer signals / channels. The UE does not expect to be configured to support adaptation to any of the following search space sets:

[0323] For the DCI format with CRC scrambled by SI-RNTI on the primary cell of the MCG, the Type0-PDCCH CSS set is configured by pdcch-ConfigSIB1 in the MIB or by searchSpaceSIB1 in PDCCH-ConfigCommon or by searchSpaceZero in PDCCH-ConfigCommon;

[0324] For the DCI format with CRC scrambled by SI-RNTI on the primary cell of the MCG, the Type0A-PDCCH CSS set is configured by searchSpaceOtherSystemInformation in PDCCH-ConfigCommon;

[0325] For DCI formats on the primary cell with CRCs scrambled by RA-RNTI or TC-RNTI, the Type 1-PDCCH CSS set configured by ra-SearchSpace in PDCCH-ConfigCommon; or

[0326] For the DCI format with CRC scrambled by P-RNTI on the primary cell of the MCG, the Type2-PDCCH CSS set is configured by pagingSearchSpace in PDCCH-ConfigCommon.

[0327] In the third method for determining the search space set applicable to PDCCH monitoring adaptation triggered by physical layer signals / channels, the index of the applicable search space set may be carried in the physical layer signal / channel that triggers the PDCCH monitoring adaptation.

[0328] In the fourth method for determining the search space set applicable to PDCCH monitoring adaptation triggered by physical layer signals / channels, the CORESET associated with the applicable search space set may be indicated by RRC signaling. For example, the configuration of RRC parameters along with the CORESET associated with the applicable search space set may indicate whether PDCCH monitoring in the associated search space set can be adapted via physical layer signals / channels.

[0329] The values ​​of any configuration parameters associated with the applicable search space set indicated by physical layer signals / channels override the values ​​of configuration parameters provided by RRC signaling.

[0330] To enable (disable) the search space set triggered by physical layer signals / channels, any of the following methods can be supported.

[0331] In the first method of enabling (disabling) search space sets, the search space set associated with a CORESET can be enabled or disabled simultaneously by indicating an active or disabled CORESET ID. For an active CORESET, when a deactivation indication is provided to the UE via a physical layer signal / channel, the UE assumes that all applicable search space sets associated with the CORESET are disabled, and the UE can skip monitoring candidate PDCCHs in the associated search space sets. For a disabled CORESET, when an enable indication is provided to the UE via a physical layer signal / channel, the UE assumes that all search space sets associated with the CORESET are enabled, and the UE monitors candidate PDCCHs in the associated search space sets.

[0332] In the second method of enabling (disabling) search space sets, applicable search space sets can be enabled / disabled simultaneously. For example, binary bits carried in physical layer signals / channels can be used to indicate whether all applicable search space sets are enabled.

[0333] In a third method for enabling (disabling) search space sets, applicable search space sets can be enabled (disabled) independently or separately. For example, applicable search space sets can be divided into N>=1 groups, and each group includes at least one applicable search space set. A bitmap of size N can be carried in the physical layer signal. The nth (1<=n<=N) bit indicates whether the nth search space set is enabled or disabled. In another example, the physical layer signal / channel can indicate the search space set group ID or search space set ID that is enabled or disabled. The UE can switch the search space set used for PDCCH monitoring based on the enable and disable indication of the corresponding search space set group. For example, when the UE receives a DCI format including a field for the search space set group ID, the UE starts or continues monitoring PDCCHs in search space sets associated with that search space set group, and does not monitor or stops monitoring PDCCHs in search space sets unrelated to that search space set group.

[0334] In the fourth method of enabling (disabling) search space sets, enabling and disabling can be indicated by the detection of physical layer signals / channels, for example, a DCI format with a CRC scrambled by energy-efficient RNTI (e.g., PS-RNTI). In one example, when the detection of physical layer signals indicates that an applicable search space set is enabled, the payload of the DCI format can be used to indicate other aspects of UE adaptation, such as PDCCH monitoring period or blind decoding capability or minimum scheduling offset. When the detection of physical layer signals indicates that an applicable search space set is disabled, the payload of the DCI format can be used to indicate the effective duration or the deactivation period. In another example, when the UE detects a DCI format indicating that a search space set is enabled or disabled, the UE starts or continues monitoring the PDCCH of the search space set associated with the search space set group with ID X, and does not monitor or stops monitoring the PDCCH of the search space set associated with another search space set group with ID Y. The search space set groups can be defined in the system operation specification (e.g., X=0, Y=1, or X=1, Y=0) or provided to the UE via higher-layer signaling.

[0335] To determine the effective time for deactivating / enabling an associated search space set, any of the following methods can be supported.

[0336] In the first method for determining the duration of enabling or disabling, the duration of enabling or disabling can be unlimited, and the UE can enable or disable the applicable search space set when it receives an enabling or disabling instruction, respectively.

[0337] In the second method for determining the enable or disable duration, the effective duration of enable or disable can be pre-configured or pre-determined by the UE. For example, it can be defined via higher-layer signaling or in the system operation specification (e.g., 6 milliseconds). In one example, when a power-saving signal / channel is detected or monitored outside the DRX ON duration, the disable or enable duration can be in DRX cycles. In another example, when a physical layer signal / channel is monitored during DRX activity or in the RRC_CONNECTED state without DRX operation, the disable or enable duration can be in a time slot or a PDCCH monitoring cycle. After applying the enable or disable indication, the UE begins decrementing a timer with an initial effective duration value. When the timer expires, the UE begins search space-based PDCCH monitoring that was disabled for PDCCH monitoring during the effective duration before the timer expires, and stops search space-based PDCCH monitoring that was enabled for PDCCH monitoring during the effective duration before the timer expires.

[0338] In the third method for determining the duration of enable or disable, the effective duration of the enable or disable indication can be carried by physical layer signals / channels. For example, a list of applicable values ​​for the effective duration can be provided to the UE via higher-layer signaling, and a field in DCI format can indicate one of the applicable values. The applicable value can be unlimited or a non-zero integer. After applying the enable or disable indication, the UE begins decrementing a timer with an initial effective duration value. When the timer expires, the UE begins search space-based PDCCH monitoring that was disabled for PDCCH monitoring during the effective duration before the timer expires, and stops search space-based PDCCH monitoring that was enabled for PDCCH monitoring during the effective duration before the timer expires.

[0339] To adapt to the CCE aggregation level (AL) or the number of candidates per CCE AL for one or more applicable search space sets, any of the following methods may be considered.

[0340] In a first method of adapting to the CCE aggregation level (AL) or the number of candidates per CCE AL for one or more applicable search space sets, a field of N>=1 bits may be carried in the PoSS to indicate whether a configured AL is enabled or disabled. In one example, N equals the number of ALs configured by RRC, and each bit indicates whether one configured AL is enabled or disabled. In another example, N=1, and bits 0 or 1 indicate whether the first or second half of the configured AL is enabled.

[0341] In a second method of adapting the CCE aggregation level (AL) or the number of candidates per CCE AL to one or more applicable search space sets, the scaling factor c0 may be indicated by the PoSS, and the number of candidate PDCCHs X per AL is adjusted by c0 such that X = ceil(X'*c0) or X = floor(X'*c0), where X' is the number of candidate PDCCHs per AL before the indication of c0 is received in the PoSS. A list of applicable values ​​may be provided to the UE via higher-level signaling or defined in the system operation specification, for example, {0, 25%, 50%, 100%}.

[0342] For UE adaptation of the PDCCH monitoring period T_PDCCH to the applicable search space set triggered by physical layer signals / channels (referred to as PoSS), any of the following methods can be supported.

[0343] In the first method for determining T_PDCCH, the scaling factor c2 for PDCCH monitoring period adaptation can be indicated by the PoSS. The UE assumes that the PDCCH monitoring period T_PDCCH of the applicable search space set is T_PDCCH = floor(T'_PDCCH*c2) or ceil(T'_PDCCH*c2), where T'_PDCCH is the PDCCH monitoring period before the indication of c2 is received in the PoSS. The list of applicable values ​​for c2 can be pre-configured by higher-layer signaling or defined in the system operation specification, for example, {0, 25%, 50%, 100%}.

[0344] In the second method for determining T_PDCCH, the list of N>=1 applicable PDCCH monitoring periods can be pre-configured by RRC signaling for the applicable search space set. One of the applicable values ​​is indicated by PoSS; for example, the DCI field of ceil(log2(N)) can indicate one of the N applicable values. The UE assumes that the PDCCH monitoring period T_PDCCH is a value indicated by PoSS.

[0345] For UE adaptation of the PDCCH monitoring duration D_PDCCH of the applicable search space set triggered by physical layer signals / channels (referred to as PoSS), any of the following methods can be supported.

[0346] In the first method for determining D_PDCCH, the scaling factor c3 for PDCCH monitoring duration adaptation can be indicated by the PoSS. The UE assumes that the PDCCH monitoring duration D_PDCCH of the applicable search space set is D_PDCCH = floor(D'_PDCCH*c3) or ceil(D'_PDCCH*c3), where D'_PDCCH is the PDCCH monitoring duration before the indication of c3 is received in the PoSS. The list of applicable values ​​for c3 can be pre-configured by higher-layer signaling or defined in the system operation specification, for example, {0, 25%, 50%, 100%}.

[0347] In the second method for determining D_PDCCH, a list of N>=1 applicable PDCCH monitoring durations can be pre-configured by RRC signaling for the applicable search space set. One of the applicable values ​​is indicated by PoSS; for example, the DCI field of ceil(log2(N)) can indicate one of the N applicable values. The UE assumes that the PDCCH monitoring duration D_PDCCH is a value indicated by PoSS.

[0348] The UE determines the PDCCH monitoring timing on the active DL BWP based on the PDCCH monitoring period, PDCCH monitoring offset, and PDCCH monitoring mode configured by RRC signaling and physical layer signals / channels used to trigger PDCCH monitoring adaptation within the time slot. For the active search space set s, if Then the UE determines that the PDCCH monitoring opportunity exists when the number is n. f The frame number is In the time slot. If the PDCCH monitoring period of the search space set s is adapted. Indicated by signal / channel, then Otherwise, k' s =k s , where k s This is the PDCCH monitoring period of the search space set s configured to the UE via RRC signaling. The UE starts at the time slot... T' S Monitor the PDCCH of the search space set s within consecutive time slots, and in the subsequent k' s- T' S The PDCCH of the search space set s is not monitored within a consecutive time slot. This applies if the duration of the search space set s is... The adaptation is indicated by PoSS, then Otherwise, T' S =T S T S It is the duration of the search space set s configured via RRC signaling.

[0349] To determine the DCI format used for monitoring the applicable search space set, physical layer signals / channels can instruct the UE to monitor a subset of the configured DCI formats. For example, binary bits with values ​​of "0" and "1" indicate that the UE monitors only DCI formats with the same size as DCI format 0_0 or only DCI format 0_1 ​​within the applicable search space set. As another example, binary bits with values ​​of "0" and "1" indicate that the UE monitors only the UL DCI format or only the DL DCI format within the applicable search space set.

[0350] Figure 16 A flowchart illustrating the activation / deactivation of a search space set triggered by physical layer signals / channels according to various embodiments of this disclosure is shown. The operations in process 1600 can be performed at the UE (such as...) Figure 3 Implemented in UE 116).

[0351] Procedure 1600 begins with operation 1602, monitoring the physical layer signal / channel (i.e., PoSS) used to trigger adaptation to one or more search space sets. In operation 1604, the PoSS is detected at the configured monitoring timing. In operation 1606, it is determined whether the applicable search space set was enabled before the PoSS was detected. If the applicable search space set was enabled before the PoSS was detected, procedure 1600 proceeds to operation 1608, deactivating the applicable search space set for the time period indicated by the PoSS. For example, a binary bit "0" may instruct the UE to perform PDCCH monitoring in the applicable search space set using the configured AL and the first half of the corresponding candidate PDCCH, and a binary bit "1" may instruct the UE to apply the configured AL and the second half of the corresponding candidate PDCCH to perform PDCCH monitoring in the applicable search space set.

[0352] However, if operation 1606 determines that the applicable search space set was not enabled before the PoSS was detected, process 1600 proceeds to operation 1610 to enable the applicable search space set and update PDCCH monitoring as indicated by the PoSS. For example, the PoSS may include the PDCCH monitoring cycle or CCE aggregation level, or candidate PDCCHs per CCE aggregation level.

[0353] Determine CORESET configuration

[0354] Another embodiment of this disclosure considers determining the configuration of the CORESET when enabling UE adaptation of the CORESET configuration via a physical layer signal / channel. In this disclosure, the physical layer signal / channel that triggers UE adaptation of PDCCH monitoring in one or more applicable CORESETs is referred to as PoSS.

[0355] UE adaptation may at least involve enabling (disabling) the configured search space set; enabling (disabling) the CORESET; and / or updating one or more configuration parameters (such as CCE AL or candidate PDCCH per CCE AL) for each search space set / CORESET.

[0356] The UE can determine the CORSET suitable for PDCCH monitoring adaptation triggered by physical layer signals / channels by one of the following methods.

[0357] In the first method of determining the applicable CORESET, the applicable CORESET can be indicated by RRC signaling. For example, RRC parameters, along with the configuration of the CORESET, can indicate whether the PDCCH monitoring in the CORESET can be adapted via physical layer signals / channels.

[0358] In the second method for determining the applicable CORESET, the index of the applicable CORESET can be carried in PoSS.

[0359] The value of any configuration parameter associated with the applicable CORESET indicated by the physical layer signal / channel may override the value of the configuration parameter provided by the RRC signaling.

[0360] When the adaptation of one or more CORESETs is indicated by a physical layer signal / channel (such as the DCI format provided by PDCCH), for each DL BWP configured for a UE in the serving cell, the signal / channel can be used to indicate to the UE that the adaptation of P'<=N1 CORESETs is required.

[0361] For the applicable CORESET of PDCCH monitoring adaptation triggered by PoSS, PoSS indicates to the UE at least one of the following adaptation parameters, and each indication may override the configuration provided by RRC signaling.

[0362] Adaptation Parameter 1: CORESET Index p. The CORESET index can be indicated implicitly. In this case, the configured adaptable CORESETs can be sorted in ascending / descending order, and the field in the DCI format can carry the value mod(j, Y) + c2, where i is the order index of the CORESET, Y can be the number of configured adaptable CORESETs or the maximum value of the configured CORESETs (e.g., 3), and c2 is an integer (e.g., c2 = 0). The CORESET index p can indicate the corresponding CORESET for the adaptation parameter or the enabling (disabling) of a CORESET.

[0363] Adaptation parameter 2: Binary enable / disable value.

[0364] Adaptation parameter 3: Precoder granularity of multiple REGs in the frequency domain, where the UE may assume that the same DM-RS precoder is used.

[0365] Adaptation parameter 4: The number of consecutive symbols N_OFDM in the time domain that provide the CORESET size. For example, the positive or negative offset of X symbols can be indicated by a signal / channel such that N_OFDM = min(N'_OFDM + X, N_max) or N_OFDM = max(N'_OFDM - X, N_min), where X can be predefined in the system operation specification (e.g., 1) or provided to the UE via higher-layer signaling, and N_max and N_min are the maximum and minimum number of consecutive symbols in the adapted CORESET, for example, N_max = 3, N_min = 1, and N'_OFDM is the number of symbols in the applicable CORESET before adaptation.

[0366] Adaptation parameter 5: A set of resource blocks of CORESET size in the frequency domain. For example, the resource blocks of the configured CORESET can be divided into multiple subsets, and the binary enable / disable value of each subset can be indicated by PoSS.

[0367] Figure 17 A flowchart illustrating physical layer-based signal / channel adaptation of CORESET according to various embodiments of this disclosure is shown. The operation of process 1700 can be performed on a UE (such as...) Figure 3 Implemented in UE 116).

[0368] Procedure 1700 begins with operation 1702, monitoring the physical layer signal / channel (i.e., PoSS) used for UE adaptation of the CORESET. In operation 1704, it is determined whether a PoSS is detected. If a PoSS is detected, procedure 1700 proceeds to operation 1706, determining the applicable adaptation parameters for the CORESET based on the applicable value indicated by the PoSS. However, if a PoSS is not detected, procedure 1700 proceeds to operation 1708, assuming no change to the CORESET configuration.

[0369] Identify candidate PDCCH / non-overlapping CCE

[0370] Another embodiment of this disclosure considers determining the candidate PDCCH and non-overlapping CCE for each time slot of the DL BWP when the adaptation of PDCCH monitoring is triggered by a signal / channel at the physical layer.

[0371] For the active search space set s associated with CORESET p, for the carrier indicator field value n CI The corresponding service cell, the time slot of the active DL BWP Candidate PDCCH in the search space set s The CCE index for the corresponding activity aggregation level L can be given by the following formula:

[0372]

[0373] in:

[0374]

[0375] It is UE for n CI The number of candidate PDCCHs monitored by the aggregation level L of the search space set s of the corresponding serving cell;

[0376] if It is indicated by physical layer signals / channels, then otherwise It equals the default value configured by RRC signaling;

[0377] For USS, if the physical layer signal / channel triggers adaptation to the maximum candidate PDCCH, then It is the largest candidate PDCCH indicated by this signal / channel, otherwise It refers to all n configured for the CCE aggregation level L of the search space set s. CI Maximum value

[0378] i = 0, ..., L-1; and

[0379] Other parameters are the same as NR Rel-15 in REF 3.

[0380] Figure 18 A flowchart illustrating the determination of a non-overlapping CCE with an adaptation request via physical layer signals / channels according to various embodiments of this disclosure is shown. The operation of process 1800 can be performed at the UE (such as...) Figure 3 Implemented in UE 116).

[0381] Procedure 1800 begins with operation 1802, where physical layer signals / channels are configured to trigger adaptation of candidate PDCCHs. For example, the UE may be configured with physical layer signals / channels to trigger adaptation of candidate PDCCHs for each CCE AL in the search space set.

[0382] In operation 1804, it is determined whether a signal / channel has been received. If a signal / channel is received, process 1800 proceeds to operation 1806, whereby the non-overlapping CCE for each time slot is determined based on the adaptation candidate PDCCH indicated by the received signal / channel. In one implementation, the non-overlapping CCE for each time slot is determined based on the candidate PDCCH for each AL adaptation or the maximum candidate PDCCH indicated by the received signal / channel according to Equation 3.

[0383] If no signal / channel is received in operation 1804, procedure 1800 proceeds to operation 1808, which determines the non-overlapping CCE for each time slot based on the candidate PDCCH configured (e.g., via RRC signaling).

[0384] In some implementations, it is desirable for the UE to monitor candidate PDCCHs in up to four sizes of DCI formats, where each serving cell includes up to min(N) PS DCI 3) DCI formats of various sizes with CRC scrambled by C-RNTI, where N PS DCIThis can be indicated by a signal / channel. The UE can count the number of DCI format sizes per serving cell based on the number of candidate PDCCHs centrally configured or enabled in the corresponding search space of the corresponding active DL BWP.

[0385] Table 3 provides the number of candidate PDCCHs adapted per time slot. When indicated by the signal / channel, the maximum number of candidate PDCCHs monitored by the UE's DL BWP with SCS configuration μ per time slot for single serving cell operation.

[0386] Table 3

[0387]

[0388] If the maximum number of candidate PDCCHs monitored per timeslot per serving cell is indicated by a signal / channel, then otherwise, in This is the maximum number of candidate PDCCHs monitored per time slot and per cell, as defined in Table 10.1-2 of REF 3. For the number of candidate PDCCHs indicated by the signal / channel, It can be explicitly indicated by the signal / channel or derived from the scaling factor provided by the channel / channel, such as or The value set can be provided by a higher layer, such as 4 values, and one value can be indicated by a field in the DCI format provided by PDCCH, such as a 2-bit field.

[0389] Monitoring can be requested from the UE via signal / channel. The ability to provide candidate PDCCH for each downlink cell. The ability to override the default value (i.e., 4) of the maximum number of downlink cells used to monitor candidate PDCCHs or the ability to configure via pdcch-BlindDetectionCA.

[0390] In some implementations, the UE will not monitor more than [number missing] times per time slot for each scheduling cell on the active DL BWP of the scheduling cell if the following two conditions are met. There are more than 10 candidate PDCCHs Non-overlapping CCEs.

[0391] Condition 1: The UE is capable of carrier aggregation with up to 4 downlink cells, or for Each downlink cell, through pdcch-BlindDetectionCA, indicates the ability to monitor candidate PDCCHs, or for The ability to monitor candidate PDCCHs via power-saving signals / channel requests; and

[0392] Condition 2: The UE is configured with a DL BWP that has an SCS configuration μ. There are downlink cells, of which are respectively or

[0393] In some implementations, the UE is considered to be in use if the following two conditions are met: The activity of the scheduling cell in each downlink cell will not be monitored more than [number] times per slot on the DL BWP. There are more than 10 candidate PDCCHs Non-overlapping CCEs.

[0394] Condition 1: For For each downlink cell, the UE indicates its ability to monitor candidate PDCCHs via pdcch-BlindDetectionCA, or for... The ability to monitor candidate PDCCHs via signal / channel requests; and

[0395] Condition 2: The UE is configured with a DL BWP that has an SCS configuration μ. There are downlink cells, of which are respectively The active cell's DL BWP is the active DL BWP for that active cell, and the deactivated cell's DL BWP is the DL BWP with an index provided by the firstActiveDownlinkBWP-Id and the signal / channel for the deactivated cell.

[0396] For each scheduling cell, the UE is not required to monitor more than [number missing] times per slot on the active DL BWP with SCS configuration in the scheduling cell. There are more than 10 candidate PDCCHs Non-overlapping CCEs.

[0397] For all active search space sets within a time slot, S CSS Indicates a base of I CSS A set of CSS, and by S USS Indicates a base of J USS A set of USS. USS USS set S j (0≤S j <J USS The positions of the search space set index are sorted in ascending order.

[0398] This refers to the CSS set S CSS(i) The number of candidate PDCCHs configured or enabled, and This indicates that the USS set S is for the activity. USS (j) The number of candidate PDCCHs configured or enabled. For the CSS set, the total number of PDCCHs required for UE monitoring in time slots is [number missing]. Non-overlapping CCEs One candidate PDCCH.

[0399] V CCE (S USS (j) represents the search space set S. USS (j) is a non-overlapping set of CCEs, and V represents CCE (S USS (j) is the cardinality of the search space set S, where S is used to search the space set S. USS (j) The non-overlapping CCE takes into account the candidate PDCCH monitored for the active CSS set and the monitored search space set S for all activities. USS (k), the candidate PDCCH is determined by 0≤k<j.

[0400] set up

[0401] set up

[0402] Set j=0

[0403] when and hour,

[0404] If the search space set j is active or not disabled by power-saving signals / channels

[0405] Monitor Each candidate PDCCH is assigned to the USS set S. uss (j);

[0406]

[0407]

[0408] end if;

[0409] j = j + 1;

[0410] end while

[0411] Other timelines for UE adaptation

[0412] Another embodiment of this disclosure also contemplates other timelines for applying a UE adaptation request to one or more adaptation parameters. In this disclosure, the associated adaptation parameter can be any adaptation parameter. When the UE receives an adaptation indication via a signal or channel of the physical layer or MCA CE, the UE can apply the UE adaptation or indicated value to the associated adaptation parameter after an application delay.

[0413] In the first implementation of determining application delay, if the UE receives an adaptation request or adaptation indication via MAC CE, the UE may send HARQ-ACK information in the slot following the time slot in which the UE sends the HARQ-ACK information for the PDSCH providing the adaptation request. The milliseconds / slot indicates the value to be applied to the associated adaptation parameters.

[0414] Figure 19 A flowchart illustrating the application of an adaptation request by a UE upon receiving an adaptation request via a MAC CE, according to various embodiments of the present disclosure, is shown. The operation of process 1900 can be performed by the UE (such as...) Figure 3 Implemented in UE 116).

[0415] Process 1900 begins with operation 1902, obtaining the time gap. Time gap It can be measured in milliseconds or time slots. In Operation 1904, an adaptation request is received via MAC CE, for example, in PDSCH.

[0416] In operation 1906, at index 1906... HARQACK / NACK is sent on the authorized time slot for the PDSCH that provides the adaptation request.

[0417] In operation 1908, it is possible to use a time slot. After The value of the new indicator in the time application adaptation request. In one example, when... When using a time slot as a unit, the UE can start from the index as The new indicated value will be applied starting from the time slot. In other words, it is expected that the UE will apply the new value starting from the time slot. The value of the new indication was not previously applied. In another example, when When measured in milliseconds, the UE can retrieve data from the index. The new indication value is applied to the time slot, where μ = 0, 1, 2, 3 is the SCS index of the active DL BWP. In other words, the UE is expected to... The new indicator value should not be applied previously, where μ = 0, 1, 2, 3 is the SCS index of the active DL BWP.

[0418] In the second implementation for determining application latency, if the UE receives an adaptation request or indication via a DCI format with a CRC scrambled by C-RNTI, the UE can perform the adaptation in a time slot. After The milliseconds / slot indicates the value to be applied to the associated adaptation parameters. Slot This could be the slot index when the UE sends a HARQ-ACK message for a PDSCH authorized by the DCI format to provide an adaptation request. In this case, when the UE sends a HARQ-NACK for a PDSCH authorized by the DCI format, the UE does not apply the triggered adaptation request or indicated value. Optionally, the slot... This could be the slot index when the UE sends HARQ-ACK / NACK information for a PDSCH authorized by the DCI format that provides an adaptation request or indication. In this case, the UE can respond with HARQ-ACK or HARQ-NACK in the time slot following a PDSCH authorized by the same DCI format that provides an adaptation request / indication. The value indicated by the application or the adaptation request.

[0419] In one example, the UE can be accessed from the index. The new indicated value will be applied starting from the time slot. In other words, it is expected that the UE will apply the new value starting from the time slot. The value of the new instruction should not be applied previously.

[0420] In another example, the UE can be accessed from the index. The new indication value is applied to the time slot, where μ = 0, 1, 2, 3 is the SCS index of the active DL BWP. In other words, the UE is expected to... The new indicator value should not be applied previously, where μ = 0, 1, 2, 3 is the SCS index of the active DL BWP.

[0421] Figure 20 A flowchart illustrating the application of an adaptation request or indication by a UE upon receiving an adaptation request or indication via a DCI format having a CRC scrambled by C-RNTI, according to various embodiments of this disclosure, is shown. The operation of flowchart 2000 can be performed by a UE (such as...) Figure 3 Implemented in UE 116).

[0422] Process 2000 begins with Operation 2002, obtaining a time gap. Time gap It can be measured in milliseconds or time slots. In Operation 2004, adaptation requests or indications are received via a DCI format with a CRC scrambled by C-RNTI.

[0423] In operation 2006, at index 0 In the authorized time slot, HARQ information is sent to the PDSCH that provides the adaptation request authorized by DCI. In operation 2008, from index... The new indication value is applied to the time slot, where μ = 0, 1, 2, 3 is the SCS index of the active DL BWP. The UE is expected to... The new indicator value should not be applied previously, where μ = 0, 1, 2, 3 is the SCS index of the active DL BWP.

[0424] In the third implementation for determining application latency, if the UE receives an adaptation request or indication via a physical layer signal / channel, the UE can perform the adaptation after receiving the adaptation request or indication. Apply the values ​​of the adaptation request or indication to the associated PDCCH monitoring parameters.

[0425] In one example, when the physical layer signal / channel used to trigger adaptation is also the scheduling DCI of the PDSCH, it is expected that the UE will be in the time slot. Previously, the new indication value was not applied, where n is the slot index when the UE receives the indication value if the DCI CRC check is successful, and μ PDSCH and μ PDCCH These are the subcarrier spacing configurations for PDSCH and PDCCH, respectively.

[0426] In another example, when the physical layer signal / channel used to trigger adaptation is also the scheduling DCI of the PDSCH, it is expected that the UE will be in the time slot. Previously, the new indication value was not applied, where n is the slot index when the UE receives the indication value if the DCICRC check is successful, and μ PDSCH and μ PDCCH These are the subcarrier spacing configurations for PDSCH and PDCCH, respectively.

[0427] In yet another example, when the physical layer signal / channel used to trigger adaptation is also the scheduling DCI of the PDSCH, it is expected that the UE will be in the time slot. Previously, the new indication value was not applied, where n is the slot index when the UE receives the indication value if the DCI CRC check is successful, and μ PDSCH and μ PDCCH These are the subcarrier spacing configurations for PDSCH and PDCCH, respectively.

[0428] In yet another example, when the physical layer signal / channel used to trigger adaptation is also the scheduling DCI of the PDSCH, it is expected that the UE will be in the time slot. Previously, the new indication value was not applied, where n is the slot index when the UE receives the indication value if the DCI CRC check is successful, and μ PDSCH and μPDCCH These are the subcarrier spacing configurations for PDSCH and PDCCH, respectively.

[0429] In yet another example, when the physical layer signal / channel used to trigger adaptation is also the scheduling DCI of the PUSCH, it is expected that the UE will be in the time slot. Previously, the value of the new indication was not applied, where n is the slot index when the UE received the indication value, and μ PUSCH and μ PDCCH These are the subcarrier spacing configurations for PUSCH and PDCCH, respectively.

[0430] In yet another example, when the physical layer signal / channel used to trigger adaptation is also the scheduling DCI of the PUSCH, it is expected that the UE will be in the time slot. Previously, the new indication value was not applied, where n is the slot index when the UE receives the indication value if the DCICRC check is successful, and μ PUSCH and μ PDCCH These are the subcarrier spacing configurations for PUSCH and PDCCH, respectively.

[0431] In yet another example, when the physical layer signal / channel used to trigger adaptation is also the scheduling DCI of the PUSCH, it is expected that the UE will be in the time slot. Previously, the new indication value was not applied, where n is the slot index when the UE receives the indication value if the DCI CRC check is successful, and μ PUSCH and μ PDCCH These are the subcarrier spacing configurations for PUSCH and PDCCH, respectively.

[0432] In yet another example, when the physical layer signal / channel used to trigger adaptation is also the scheduling DCI of the PUSCH, it is expected that the UE will be in the time slot. Previously, the new indication value was not applied, where n is the slot index when the UE receives the indication value if the DCI CRC check is successful, and μ PUSCH and μ PDCCH These are the subcarrier spacing configurations for PUSCH and PDCCH, respectively.

[0433] In yet another example, when the physical layer signal / channel used to trigger adaptation is a non-scheduled DCI format, such as an energy-efficient dedicated DCI format in the form of USS or CSS with a CRC scrambled by PS-RNTI, it is expected that the UE will... The new indication value is not applied previously, where μ = 0, 1, 2, 3 is the SCS index of the active DL BWP when the UE is ready to apply the triggered adaptation, and n is the slot index when the UE receives the indication value if the DCI CRC check is successful.

[0434] In yet another example, when the physical layer signal / channel used to trigger adaptation is a non-scheduled DCI format, such as an energy-efficient dedicated DCI format in the form of USS or CSS with a CRC scrambled by PS-RNTI, it is expected that the UE will... The new indication value was not applied previously, where n is the slot index when the UE receives the indication value if the DCI CRC check is successful.

[0435] Figure 21 A flowchart illustrating the application of an adaptation request to PDCCH monitoring in a UE when an adaptation request is received via a shared PDCCH or a non-scheduled DCI without HARQ feedback, according to various embodiments of this disclosure. The operation of process 2100 can be performed in a UE (such as...) Figure 3 Implemented in UE 116).

[0436] Process 2100 begins with operation 2102, obtaining the time gap. Time gap It can be measured in milliseconds, a time slot, or the duration of an OFDM symbol. In operation 2104, in a time slot... Adaptation requests or indications are received via group-shared PDCCH or non-scheduled DCI. In operation 2106, in the time slot... At least afterwards The time or time slot application adaptation request or instruction.

[0437] UE can be determined by one of the following examples. The value of . In the first example, It is fixed and defined in the system operating specifications (e.g., or In one example, It is defined according to the SCS configuration.

[0438] In the second example, Where Y is the minimum K0 value before applying the new indication or before UE adaptation, and Z is the minimum feasible non-zero application delay. Z can be fixed and defined in the system operation specification (e.g., Z=1 or Z=2). Z can depend on the DL SCS, for example, Z=1 for SCS=15KHz / 30KHz; Z=2 for SCS=60KHz; and Z=3 for Z=120KHz.

[0439] In the third example, Where Y is the maximum value among the minimum K0 and / or the minimum K2 and / or the minimum aperiodic CSI-RS triggering offset before applying the new indication's applicable value or UE adaptation, and Z is the minimum non-zero applicable delay that is feasible. Z can be fixed and defined in the system operation specification (e.g., Z = 1 or Z = 2). Z can depend on the DLSCS. For example, for SCS = 15KHz / 30KHz, Z = 1; for SCS = 60KHz, Z = 2; and for SCS = 120KHz, Z = 3.

[0440] In the fourth example, it can be provided to the UE via higher layer signaling

[0441] In the fifth example, it can be provided to the UE via higher layer signaling in response to auxiliary information of the preferred value sent from the UE to the gNB.

[0442] In the sixth example, it can be associated with the time gap / offset (denoted as O^MO_DRX1) between the first monitoring occasion of the physical layer signal / channel for triggering UE adaptation and the start of the next DRX ON duration.

[0443] In a sub - example of the sixth example, where Z is the minimum non - zero applicable delay that is feasible. Z can be defined in the system operation specification (e.g., Z = 1 or Z = 2); or for SCS = 15KHz / 30KHz, Z = 1; for SCS = 60KHz, Z = 2; and for SCS = 120KHz, Z = 3; or Z is the UE capability of the BWP switching delay, i.e., bwp - SwitchingDelay.

[0444] In another sub - example of the sixth example, The UE can apply the triggered UE adaptation or the indicated applicable value at the start of the first time slot of the next DRX ON duration. The UE is not expected to be configured with O^MO_DRX2 < bwp - SwitchingDelay, where bwp - SwitchingDelay is the UE capability of the BWP switching delay when the physical layer signal / channel outside the DRX active time also triggers BWP switching.

[0445] In the seventh example, it can be associated with the time gap / offset (denoted as O^MO_DRX2) between the previous monitoring occasion of the physical layer signal / channel for triggering UE adaptation and the start of the next DRX ON duration.

[0446] In a sub - example of the seventh example, Where Z is the smallest non-zero applicable delay that is feasible. Z can be defined in the system operation specification (e.g., Z = 1 or Z = 2); or for SCS = 15KHz / 30KHz, Z = 1; for SCS = 60KHz, Z = 2; and for SCS = 120KHz, Z = 3; or Z is the UE capability of the BWP switching delay, i.e., bwp-SwitchingDelay.

[0447] In another sub-example of the seventh example, The UE can apply the triggered UE adaptation or the indicated applicable value at the start of the first time slot of the next DRX ON duration. The UE does not expect to configure O^MO_DRX2 < bwp-SwitchingDelay, where bwp-SwitchingDelay is the UE capability of the BWP switching delay when the physical layer signal / channel outside the DRX active time also triggers BWP switching.

[0448] In the eighth example, when the UE adaptation is triggered by a physical layer signal / channel outside the DRX active time, It can be the time gap between the time when the UE receives the adaptation request or indication through the signal / channel of the physical layer and the Nth time slot within the active time of the associated next DRX cycle. In this case, it is expected that the UE does not apply the triggered UE adaptation or the indicated value before the Nth time slot within the active time of the associated next DRX cycle. N can be provided by higher layer signaling or defined in the system operation specification (e.g., N = 1).

[0449] In the ninth example, when the UE adaptation is triggered by a physical layer signal / channel outside the DRX active time, It can be the time gap between the time when the UE receives the adaptation request or indication through the signal / channel of the physical layer and the first time slot of the PDCCH monitoring occasion within the active time of the associated next DRX cycle. In this case, it is expected that the UE does not apply the triggered UE adaptation or the indicated value before the first time slot of the PDCCH monitoring occasion within the active time of the associated next DRX cycle.

[0450] For UE adaptation triggered by a physical layer signal / channel, when a DRX period is configured, depending on whether the UE detects the physical layer signal / channel outside or within the active time, the UE may have different applicable delays. The active time is defined in REF 6.

[0451] Figure 22 A flowchart showing the applicable delays applied by the UE when an energy-saving signal / channel is monitored inside and outside the DRX active time according to various embodiments of the present disclosure is shown. The operations of process 2200 can be performed in a UE (such as Figure 3Implemented in UE 116).

[0452] Procedure 2200 begins with operation 2202, obtaining one or more adaptation delays to apply to UE adaptations triggered by physical layer signals / channels outside the active time of the DRX cycle. Figure 22 In a non-limiting implementation, X1 is the adaptation delay outside the DRX activity time, and X2 is the adaptation delay during the DRX activity time.

[0453] In operation 2204, it is determined whether an adaptation request was received via physical layer channels / signals outside of DRX activity time.

[0454] If an adaptation request is received outside of the DRX active period via a physical layer channel / signal (e.g., a DCI format with a CRC scrambled by a power-saving dedicated RNTI (PS-RNTI)), procedure 2200 proceeds to operation 2206, applying the triggered adaptation after the time slot determined by the adaptation delay X1. In one example, it is expected that the UE will not apply the applicable values ​​of the minimum K0 and / or K2 and / or aperiodic CSI-RS trigger offset indicated by the DCI format before the first time slot index of the PDCCH monitoring timing in the next associated DRX active period. In another example, it is expected that the UE will not operate in the target BWP indicated by the DCI format before the first time slot index in the next associated DRX active period. In this other example, the time offset between the previous PDCCH monitoring timing of the physical layer signal / channel that triggers the BWP handover outside of the DRX active period and the start of the associated next DRX ON duration should not be less than the BWP handover delay.

[0455] Returning to operation 2204, if it is determined that the adaptation request was not received outside the DRX active time via a physical layer channel / signal, then procedure 2200 proceeds to operation 2208, whereby the adaptation request was received during the DRX active time via a physical layer channel / signal (e.g., a scheduled DCI format with a CRC scrambled by C-RNTI). In operation 2210, the triggered adaptation is applied after the time slot determined by the adaptation delay X2. For example, it is expected that the UE will not apply the applicable values ​​of the indicated minimum K0 and / or K2 and / or aperiodic CSI-RS trigger offset before the time slot in which the UE sends HARQ-ACK information for the PDSCH providing the UE adaptation request, scheduled by the DCI format.

[0456] UE adaptation for one or more adaptation parameters based on physical layer signaling / channels can be reset to default values. Default values ​​can be predefined in specifications or system operations or configured via higher-layer signaling.

[0457] In one example, the values ​​of the associated adaptation parameters can be... The milliseconds / timeslot ratio is reset to the default value.

[0458] In another example, the UE may receive a higher-level command (e.g., MAC CE) to instruct the adaptation parameters to be reset to their default values.

[0459] In another example, if the UE's current value is invalid, the associated adaptation parameter value can be reset to its default value. For instance, after a BWP handover, the current value of something like the minimum K0 / K2 / aperiodic CSI-RS might be greater than all candidate values ​​configured in the new active DL / UL BWP, and therefore invalid. In this case, the UE can apply / reset the associated adaptation parameter to its default value. When the invalid value is the minimum K0 / K2, the default value could be the minimum value in the Time Domain Resource Allocation (TDRA) table used in the new active DL / UL BWP.

[0460] UE can be determined by one of the following examples. The value of .

[0461] In the first example, It is fixed and defined in the system operation specifications, for example,

[0462] In the second example, It can be provided to the UE via higher-level signaling.

[0463] In the third example, It can be provided to the UE via higher-layer signaling in response to auxiliary information of preferred values ​​sent from the UE to the gNB.

[0464] To avoid an error situation where the UE and the service gNB have different understandings of the candidate PDCCH or search space set monitored by the UE due to the UE's failure to detect a signal / channel (such as the UE's failure to detect in the PDCCH the DCI format including fields that provide adaptation for multiple candidate PDCCHs or search space sets for the UE to monitor the PDCCH), one of the following two examples can be implemented.

[0465] In one example, enabling or disabling a candidate PDCCH or search space set can be achieved based on a descending search space set index, starting with the largest active search space set index. The index of the search space set s that triggers adaptation via DCI format sent by the gNB can be carried in a field of the DCI format. For example, a field of size c1 in the DCI format used to trigger adaptation to PDCCH monitoring can carry information mod(s, 2^c1), where c1 is defined in the system operation specification such that c1 = 1, or provided to the UE via higher-layer signaling.

[0466] In another example, the DCI format may include a field with c2 bits, and the c2 bits may carry a counter x = 0, 1, ..., 2^c2-1, such that x = mod(x'+1, 2^c2), where x' is a counter from the previous DCI format sent by the gNB.

[0467] Explain the DCI format used to trigger UE adaptation.

[0468] Another embodiment of this disclosure is intended to explain a DCI format used to trigger UE adaptation to power saving. The UE may receive a DCI format with a CRC scrambled by a power-saving dedicated RNTI (e.g., PS-RNTI). In this document, this DCI format is referred to as PS-DCI.

[0469] The PS-DCI can be sent by the gNB to one or more UEs, and for one or more fields associated with a UE, each associated UE can configure a position in the PS-DCI. For example, the PS-DCI can consist of N>=1 blocks. Each block is dedicated to one UE. The block index n_block and the block size N^block_bits can be provided to the UE. The UE can determine that the start bit of the block associated with the UE is n_block*N^block_bits.

[0470] One or more DCI fields can be bound together to associate with energy-saving schemes / technologies. Bound DCI fields can be enabled or disabled via higher-level signaling.

[0471] PS-DCI can be detected by the UE outside of or during DRX active time, or in the RRC_CONNECTED state when C-DRX is not configured. When PS-DCI is detected by the UE in the RRC_CONNECTED state outside of and during DRX active time, the PS-DCI field used to trigger UE adaptation may have different interpretations depending on whether the UE detects the DCI format outside of or during DRX active time, or at some point during DRX active time.

[0472] When the UE detects a DCI format with a power-saving field before the DRX ON duration, a 1-bit field (referred to as the first field in this disclosure) indicates whether the UE should wake up for the next X>=1 DRX ON duration or the next X>=1 DRX cycle. In other words, the first field indicates whether the UE should skip PDCCH monitoring for the next X>=1 DRX ON duration / cycle. X is a positive integer and may be defined in the system operation specification (e.g., X=1), or provided to the UE via higher-layer signaling, or may be the number of DRX cycles within the current cycle of the DCI format and before the next monitoring opportunity in the next cycle. For example, a "1" in the first field indicates waking up for the next X DRX ON durations / cycles without skipping PDCCH monitoring; a "0" in the first field indicates sleeping for the next X DRX ON durations / cycles and skipping PDCCH monitoring. For example, a "0" in the first field can indicate that the device will remain awake for the next X DRX ON durations / cycles without skipping PDCCH monitoring; a "1" in the first field can indicate that the device will remain asleep for the next X DRX ON durations / cycles without skipping PDCCH monitoring. The remaining fields in the DCI format used to trigger UE adaptation can be interpreted based on the result of the first field, according to the following rules.

[0473] Rule 1: When the UE is instructed not to wake up or skip PDCCH monitoring for the next X DRX ON duration, another field of one or more bits (referred to as the second field in this disclosure) can be any of the following examples.

[0474] In the first example of Rule 1, the second field may indicate whether the UE should wake up for the next N1*Y DRX ON durations / cycles after the next X DRX ON durations / cycles. In this case, the second field may consist of N1 binary bits, where each bit indicates whether the UE should wake up for Y consecutive DRX ON durations / cycles in the i-th group (i = 0, ..., N1-1) after the next X DRX ON durations / cycles. N1 may be predefined in the specification (e.g., N1 = 1) or provided to the UE via higher-layer signaling. Y >= N1 may be predefined in the system operation specification (e.g., Y = 1) or provided to the UE via higher-layer signaling.

[0475] In the second example of Rule 1, the 1-bit second field may indicate whether the UE needs to monitor the PDCCH in the CSS set during the next X DRX ON durations or DRX cycles. The associated PDCCH may be a DCI format such as a CRC scrambled by P-RNTI or a DCI format with a CRC scrambled by SI-RNTI.

[0476] In the third example of Rule 1, the second field may indicate an additional sleep duration, during which the UE skips the DRX ON duration. A list of applicable non-zero values ​​for the sleep duration may be provided to the UE via higher-layer signaling or predefined in the system operation specification. The second field may indicate one of the candidate values ​​for the sleep duration. The sleep duration may be in units of a DRX ON duration or a DRX cycle.

[0477] In the fourth example of Rule 1, the second field may indicate a handover between "dormant" and "non-dormant" behavior on an active SCell other than the SCell where the UE monitors the PS-DCI. When the UE is instructed to have "dormant" behavior on the SCell, the UE either does not monitor the PDCCH of at least the USS set in the SCell, or monitors the PDCCH of at least the USS set in the SCell with a relatively long monitoring period.

[0478] Rule 2: When the UE is instructed to wake up for the next X DRX ON duration or not skip PDCCH monitoring, another field of one or more bits (referred to as the second field in this disclosure) can be any of the following examples.

[0479] In the first example of Rule 2, the second field of the N1' bit can indicate the active DL BWP assumed by the UE for the next X DRX ON durations. N1' can be predefined in the system operation specification (e.g., N1' = 1) or provided to the UE via higher-layer signaling. N1' can be ceil(log2(N^DL_BWPs)), where N^DL_BWPs is the number of configured DL BWPs.

[0480] In the second example of Rule 2, the second field of the N2' bit can indicate a minimum K0 / K2, where K0 / K2 indicates the slot offset between the DCI and its scheduled PDSCH / PUSCH. N2' can be predefined in the system operation specification (e.g., N2' = 1) or provided to the UE via higher-layer signaling.

[0481] In the third example of Rule 2, the second field can be a CSI request, instructing the UE to report aperiodic CSI. The second field can be 0, 1, 2, 3, 4, 5, or 6 bits, determined by the higher-level parameter `reportTiggerSize` in REF 7. The UE assumes the same indication and reporting methods as NR Rel-15.

[0482] In the fourth example of Rule 2, the second field may indicate a switch between "sleep - like" behavior and "non - sleep - like" behavior on active SCell(s) other than the SCell on which the UE monitors PS - DCI. When the UE is instructed to have "sleep - like" behavior for an SCell, the UE does not monitor the PDCCH of at least the USS set in the SCell, or monitors the PDCCH of at least the USS set in the SCell with a relatively large monitoring period. The active SCell(s) other than the cell on which the UE monitors PS - DCI can be divided into N3' groups. The second field may be N3' bits, and the j - th (1 <= j <= N3') bit indicates whether the UE should operate with "sleep - like" behavior in the SCell associated with the j - th group.

[0483] In the fifth example of Rule 2, the second field indicates a minimum scheduling offset, where any scheduling offset between a scheduled DCI format and the scheduled data transmission or reception is greater than the minimum scheduling offset.

[0484] In the sixth example of Rule 2, the second field indicates the maximum MIMO layer applied to PDSCH transmission or PUSCH reception for any serving cell.

[0485] In the seventh example of Rule 2, the second field indicates the maximum TX antenna port or RX antenna port used for UL data transmission or DL data reception, respectively.

[0486] In the eighth example of Rule 2, the second field indicates the PDCCH monitoring period for at least the USS set in any serving cell.

[0487] In the ninth example of Rule 2, the second field indicates the minimum PDCCH monitoring period for at least the USS set in any serving cell.

[0488] In the tenth example of Rule 2, the second field may be a joint adaptation indicator for triggering adaptation in terms of multiple power consumptions. In this case, an adaptation table may be provided to the UE to address the adaptation of RRC parameters that are not configured by BWP but are necessary for defining different power consumption levels or energy - saving states. The joint adaptation indicator may be the row index of the adaptation table, which indicates the adaptation of the associated adaptation parameters. Table 4 shows an exemplary adaptation table for adaptation signaling with minimum K0 / K2, maximum MIMO layer / port, and active CC group. The configured active cells may be grouped by the gNB, and the cell group index may be included in the adaptation table.

[0489] Table 4

[0490]

[0491] Figure 23A flowchart illustrating various embodiments of this disclosure is provided, explaining the PS-DCI detected by the UE outside of DRX activity time. The operation of process 2300 can be performed by the UE (such as...) Figure 3 Implemented in UE 116).

[0492] Procedure 2300 begins with operation 2302, monitoring the DCI format with fields used to trigger UE adaptation. In one implementation, UE adaptation may be for power saving. In operation 2304, the DCI format for power saving is detected outside the DRX ON duration. The DCI format may be detected by a successful CRC check. In operation 2306, a first field is determined indicating whether to wake up for the next X DRX ON durations / cycles. In one implementation, the first field may include bits that trigger UE adaptation for power saving.

[0493] If it is determined in operation 2306 that the UE should be woken up for the next X DRX ON durations / cycles, then process 2300 proceeds to operation 2308, where the active DL BWP is determined after wake-up. In operation 2310, the minimum K0 / K2 is determined after wake-up; and in operation 2312, the joint adaptation indicator is determined. The active DL BWP, minimum K0 / K2, and joint adaptation indicator may be determined based on binary bits included in the same field (e.g., a second field). Optionally, the binary bits may be in different fields in the detected DCI format.

[0494] Returning to operation 2306, when the first field indicates that the UE will not wake up during the next X DRX ON durations / cycles (i.e., skipping PDCCH monitoring or entering sleep mode during the next X DRX ON durations), then procedure 2300 proceeds to operation 2314, where the UE determines whether to wake up during the next N1*Y DRX ON durations / cycles following the next X DRX ON durations. This determination can be based on binary bits in the same field as the fields including the active DL BWP, minimum K0 / K2, and joint adaptation indicator (i.e., in the second field). Optionally, the binary bits can be in a different field.

[0495] When the UE detects a DCI format with fields for triggering UE adaptation at the start of the DRX ON duration or within the first K slots / milliseconds of the DRX ON duration, a 1-bit field or the first field can indicate whether the UE should enter sleep mode or skip PDCCH monitoring for the remaining active time of the current DRX cycle. In one example, a "1" in the first field indicates entering sleep mode and skipping PDCCH monitoring for the remaining active time of the current DRX cycle; a "0" in the first field indicates continuing PDCCH monitoring for the remaining active time of the current DRX cycle without entering sleep mode. In another example, a "0" in the first field indicates entering sleep mode and skipping PDCCH monitoring for the remaining active time of the current DRX cycle; a "1" in the first field indicates continuing PDCCH monitoring for the remaining active time of the current DRX cycle without entering sleep mode. The K slots / milliseconds can be defined in the system operation specification (e.g., K=1) or provided to the UE via higher-layer signaling. According to the following rule, the remaining fields of the DCI format used to trigger UE adaptation detected at the beginning of the DRX ON duration or within the first K slots / milliseconds of the DRX ON duration can be interpreted based on the result of the first field.

[0496] Rule 1. When a UE enters sleep mode or skips PDCCH monitoring during the remaining active time of the current DRX cycle, another field or a second field of the N1 bit can indicate whether the UE will skip PDCCH monitoring for the next N1*Y DRX ON durations after the active time of the current DRX cycle. This field can consist of N1 binary bits, and each of the N1 bits indicates whether the UE can skip PDCCH monitoring for Y consecutive DRX ON durations / cycles in the i-th group (i = 0, 1, ..., N1-1). Either N1 or Y can be predefined in the system operation specification (e.g., N1 = 1 / Y = 1) or provided to the UE via higher-layer signaling.

[0497] Rule 2. When the UE does not enter sleep mode or skips PDCCH monitoring during the remaining active time of the current DRX cycle, another field or a second field of the N1' bit after the first field may indicate the active DL BWP. N1' may be predefined in the system operation specification (e.g., N1' = 1) or provided to the UE via higher-layer signaling. When the UE does not enter sleep mode or skips PDCCH monitoring during the remaining active time of the current DRX cycle, another field or a third field of the N2' bit after the first or second field may include a minimum K0 / K2 for cross-slot scheduling, where K0 / K2 indicates the slot offset between the DCI and its scheduled PDSCH / PUSCH. N2' may be predefined in the system operation specification (e.g., N2' = 1) or provided to the UE via higher-layer signaling. When the UE does not enter sleep mode or skips PDCCH monitoring during the remaining active time of the current DRX cycle, another field after the first field may be a joint adaptation indicator for triggering adaptation in multiple power consumption aspects. In this case, an adaptation table can be provided to the UE to address the adaptation of RRC parameters that are not configured by BWP but are necessary for defining different power consumption levels or power saving states.

[0498] Figure 24 A flowchart illustrating various embodiments of this disclosure is provided, showing the DCI format detected by the UE at the start of the DRX ON duration to trigger UE adaptation. The operation of process 2400 can be performed on the UE (such as...) Figure 3 Implemented in UE 116).

[0499] Procedure 2400 begins with operation 2402, which monitors the DCI format containing the field used to trigger UE adaptation. In operation 2404, the DCI format is detected within the first K time slots of the DRX ON duration. In operation 2406, it is determined whether to enter sleep mode for the remaining active time of the current DRX cycle. In one implementation, this determination is made based on the binary bits in the first field used to trigger UE adaptation.

[0500] If the first field indicates that the UE should not enter sleep mode during the remaining active time of the current DRX cycle, i.e., continue PDCCH monitoring, then procedure 2400 proceeds from operation 2406 to operation 2408, determining the active DL BWP after wake-up. In operation 2410, the minimum K0 / K2 is determined after wake-up; and in operation 2412, the joint adaptation indicator is determined. The active DL BWP, minimum K0 / K2, and joint adaptation indicator can be determined based on information bits included in the same field (e.g., the second field) or based on information bits in different fields.

[0501] Returning to operation 2406, if it is determined that the first field indicates the UE should enter sleep mode during the remaining active time of the current DRX cycle, i.e., skip PDCCH monitoring, then procedure 2400 proceeds from operation 2406 to operation 2414 to determine whether to wake up for the next N1*Y DRX ON durations after the active time of the current DRX cycle. In one implementation, this determination may be based on information bits in another field / second field.

[0502] When a UE detects a DCI format containing fields used to trigger UE adaptation during DRX activity, or after the first K slots / milliseconds of the DRX ON duration, or when DRX is not configured, the fields in the DCI format can be interpreted as indicating UE adaptation unrelated to DRX operation. K can be defined in the system operation specification (e.g., K=1) or provided to the UE via a higher layer. The content of the DCI format can be any of the following examples.

[0503] In the first example, a one-bit field, or the first field, can indicate whether the UE skips PDCCH monitoring in X PDCCH monitoring opportunities, periods, milliseconds, and / or time slots within the corresponding search space set adaptable to the DCI format. X can be predefined in the system operation specification (e.g., X = 10) or provided to the UE via higher-layer signaling. For example, a "1" in the first field can indicate that the UE skips PDCCH monitoring in X PDCCH monitoring opportunities, periods, milliseconds, and / or time slots; a "0" in the first field can indicate that the UE does not skip PDCCH monitoring in X PDCCH monitoring opportunities, periods, milliseconds, and / or time slots. As another example, a "0" in the first field can indicate that the UE skips PDCCH monitoring in X PDCCH monitoring opportunities, periods, milliseconds, and / or time slots; a "1" in the first field can indicate that the UE does not skip PDCCH monitoring in X PDCCH monitoring opportunities, periods, milliseconds, and / or time slots. The remaining fields of the DCI format used to trigger UE adaptation can be interpreted based on the result of the first field, according to the following rule.

[0504] Rule 1. When a UE is triggered to skip PDCCH monitoring for X PDCCH monitoring opportunities, periods, milliseconds, and / or slots, another field or a second field of the N1 bit may indicate whether the UE can skip PDCCH monitoring for an additional time period after the X PDCCH monitoring opportunities, periods, milliseconds, and / or slots. For example, the second field may be the N1 bit and indicate whether the UE can skip PDCCH monitoring for the next N1*Y PDCCH monitoring opportunities and / or periods after the X PDCCH monitoring opportunities, periods, milliseconds, and / or slots. In this case, each of the N1 bits may indicate whether the UE can skip PDCCH monitoring for Y consecutive PDCCH monitoring periods / opportunities in the i-th group (i = 0, 1, ..., N1-1). Any of N1 / Y may be predefined in the system operation specification (e.g., N1 = 1 / Y = 1) or provided to the UE via higher-layer signaling. As another example, the second field may be the N1 bit and may indicate one of 2^N1 pre-configured time periods in the subsequent corresponding search space set where the UE can skip PDCCH monitoring.

[0505] Rule 2. When a UE is triggered to not enter sleep mode or continue PDCCH monitoring for X PDCCH monitoring opportunities / cycles, an additional or second field of the N1' bit after the first field may indicate adaptation to the PDCCH monitoring cycle. N1' may be predefined in the system operation specification (e.g., N1' = 1) or provided to the UE via higher-layer signaling. When a UE does not enter sleep mode or skips PDCCH monitoring during the remaining active time of the current DRX cycle, another or third field of the N2' bit after the first or second field may include a minimum K0 / K2 for cross-slot scheduling, where K0 / K2 indicates the slot offset between the DCI and its scheduled PDSCH / PUSCH. N2' may be predefined in the system operation specification (e.g., N2' = 1) or provided to the UE via higher-layer signaling. When the UE does not enter sleep mode or skip PDCCH monitoring during the remaining active time of the current DRX cycle, a third field, such as the N3' bit following the first or second field, can indicate adaptation of candidate PDCCHs for each CCE AL to the corresponding search space set. The corresponding search space set can be defined in the system operation specification or provided to the UE via higher-layer signaling. N3' can be predefined in the system operation specification (e.g., N3' = 1) or provided to the UE via higher-layer signaling.

[0506] In the second example, the N1>=1 bit field can indicate one of 2^N1 joint candidate adaptation items associated with multiple adaptation parameters related to the PDCCH in the corresponding search space set that can be adapted by the DCI format. The 2^N1 candidate adaptation items can be predefined in the system operation specification (e.g., N1=2 (Table 5)) or provided to the UE via higher-layer signaling. The relevant adaptation parameter can be the minimum PDCCH monitoring period in the corresponding search space set. In this case, for a corresponding search space s where the PDCCH monitoring period is less than X, when the UE receives a DCI format indicating that the minimum PDCCH monitoring period is X, the UE will assume that the PDCCH monitoring period is adapted to X. Another relevant adaptation parameter can be the maximum number of candidate PDCCHs per CCE AL in the corresponding search space set. In this case, for a corresponding search space s where the number of candidate PDCCHs per CCE AL is greater than Y, when the UE receives a DCI format indicating that the maximum candidate PDCCH is Y, the UE will assume that the candidate PDCCHs per CCE AL are adapted to Y.

[0507] Table 5

[0508] DCI field Minimum PDCCH monitoring period / slot Maximum candidate PDCCH per AL 00 T＝1 16 01 T＝2 8 10 T＝3 4 11 T＝4 2

[0509] In the third example, the field can indicate the minimum scheduling delay offset, that is, the minimum applicable value of K0 or K2.

[0510] In the fourth example, the field can indicate the minimum processing timeline offset. This field can be c1 bits to indicate a pre-configured list of 2^c1 candidate values. The minimum processing time offset can indicate any of the following:

[0511] Minimum applicable value of K0;

[0512] Minimum applicable value of K2;

[0513] Minimum applicable value for non-periodic CSI-RS trigger offset;

[0514] Minimum applicable value for SRS slot offset; and / or

[0515] The minimum applicable value of K1.

[0516] In the fifth example, the DCI format may include any one of the following fields to trigger adaptation for PDCCH monitoring associated with the search space set s in CORESET p:

[0517] A field with a c1 bit is used to indicate the associated search space set index s to be adapted. For example, mod(s, 2^c1) is carried in the DCI, where c1 can be defined in the system operation specification (e.g., c1 = 1) or provided to the UE via higher-layer signaling.

[0518] It has a 1-bit field for indicating whether the search space set is disabled or enabled;

[0519] A 1-bit field is used to indicate whether CORESET p associated with the search space set s is disabled or enabled;

[0520] A field with 1 bit is used to indicate the adjustment of the monitoring period of the search space set s. For example, "0" indicates that the monitoring period of the search space set s is halved, and "1" indicates that the monitoring period of the search space set s is doubled.

[0521] A field with 1 bit is used to indicate the adjustment of the monitoring duration of the search space set s, for example, "0" indicates that the monitoring duration of the search space set s is halved, and "1" indicates that the monitoring duration of the search space set s is doubled;

[0522] A field with a c2 bit is used to indicate whether CCE AL is enabled or disabled, where c2 can be defined in the system operation specification (e.g., c2=2) or provided to the UE via higher-layer signaling; and / or

[0523] A field with a c3 bit is used to indicate the candidate PDCCH that is enabled or disabled for each CCE AL, where c3 can be defined in the system operation specification (e.g., c3=2) or provided to the UE via higher-layer signaling.

[0524] In the sixth example, the DCI format may include any one of the following fields to trigger adaptation for PDCCH monitoring with one or more corresponding search space sets:

[0525] A field with c4 bits is used to indicate the number of cells monitoring candidate PDCCHs, where c4 can be defined in the system operation specification (e.g., c4=2) or provided to the UE via higher-layer signaling;

[0526] A field with a c5 bit is used to indicate the maximum number of candidate PDCCHs monitored per time slot and per serving cell, where c5 can be defined in the system operation specification (e.g., c5=2) or provided to the UE via higher-layer signaling;

[0527] A field with c6 bits is used to indicate the active DL BWP, where c6 can be defined in the system operation specification (e.g., c6=2) or provided to the UE via higher-layer signaling;

[0528] A 1-bit field indicates whether the UE skips the monitoring PDCCH for N time slots / milliseconds, where N can be defined in the system operation specification (e.g., N=1) or provided to the UE via higher-layer signaling; and / or

[0529] A field with a c7 bit is used to indicate the sleep duration T_sleep, during which the UE does not monitor any PDCCH in the corresponding search space set. For example, the c7 bit can indicate 2^c7 candidate sleep durations, where c7 and the candidate sleep durations can be defined in the system operation specification or provided to the UE via higher-layer signaling.

[0530] Figure 25 A flowchart illustrating the detection of DCI format for power saving by the UE during DRX activity time according to various embodiments of this disclosure is shown. The operation of process 2500 can be performed by the UE (such as...) Figure 3 Implemented in UE 116).

[0531] Procedure 2500 begins with operation 2502, obtaining a configuration of the DCI format with fields for triggering UE adaptation and the corresponding search space set that can be adapted. In operation 2504, the DCI format is detected during the DRX active period or DRX is not configured. In one implementation, the DCI format is detected with a successful CRC check during the DRX active period. In operation 2506, it is determined whether the first field indicates skipping PDCCH monitoring or disabling the corresponding search space set. For example, this determination can be used to skip PDCCH monitoring in the corresponding search space set for a certain period of time (such as X PDCCH times, periods, slots, and / or milliseconds).

[0532] If the first field associated with the adaptation signaling indicates that PDCCH monitoring is not skipped, then process 2500 proceeds from operation 2506 to operation 2508 to determine the PDCCH monitoring cycle, and then proceeds to operation 2510 to determine the candidate PDCCH for each CCE AL adaptation for the corresponding search space set that is not disabled.

[0533] If the first field associated with the adaptation signaling indicates that PDCCH monitoring should be skipped, then process 2500 proceeds to operation 2512 to determine whether PDCCH monitoring should be skipped during an additional time period (such as the next N1*Y PDCCH monitoring timing / cycle / slot / millisecond after the deactivation period indicated in the first field). This determination may be made based on information bits included in the second field or another field.

[0534] Determine the timing of PDCCH monitoring to trigger UE adaptation associated with DRX operation.

[0535] Another embodiment of this disclosure relates to determining the timing of physical layer signal / channel monitoring for triggering UE adaptation associated with DRX operation in the RRC_CONNECTED state. The UE may receive a DCI format with a CRC scrambled by an energy-saving dedicated RNTI (e.g., PS-RNTI). This DCI format is referred to herein as PS-DCI.

[0536] The UE can configure PDCCH-based signals / channels in the search space set s to trigger UE adaptation associated with DRX operation in the RRC_CONNECTED state. The UE can determine the PDCCH monitoring timing on the active DL BWP based on the PDCCH monitoring period, PDCCH monitoring offset, and PDCCH monitoring mode within the time slot. If Then the UE determines that the PDCCH monitoring opportunity for the signal / channel in the corresponding search space set s exists in the location numbered n. f The frame number is In the time slot (REF 1). The value X is suitable as a candidate value for the PDCCH monitoring period of the search space set s only if X is a multiple of the DRX cycle T_DRX configured in time slots, i.e., monitoringSlotPeriodicityAndOffset in REF 7, such that MOD(X, T_DRX) = 0. Only if o s When <= O_DRX, the value Y is suitable as a candidate value for the PDCCH monitoring offset of the search space set s, where O_DRX is the configuration delay / offset of the DRX cycle. Signals / channels can only be applied to long DRX cycles. In this case, when only short DRX cycles are configured, it is expected that the UE will not monitor the signals / channels used to trigger the adaptation associated with DRX operation. When the UE is configured to use a duration T... s When monitoring the DCI format used to trigger DRX operations associated with the search space set s, the UE is in the time slot The beginning of T s A continuous time-slot monitoring search space set s contains DCI formats, and under k s -T s The DCI format in the search space set s is not monitored in a continuous time slot.

[0537] The UE can determine the duration T based on the configured duration. s Given the PDCCH monitoring patterns within the time slots of the associated search space set s, determine the number N_MOs of PDCCH monitoring opportunities per PDCCH monitoring cycle used to send PS-DCI to trigger UE adaptation associated with DRX operation, such that N_MOs = T s*N^MOs_slot, where N^MOs_slot is the number of PDCCH monitoring opportunities within a slot indicated by the configured PDCCH monitoring mode, or the number of start OFDM symbols within a slot associated with the search space set s.

[0538] The UE can expect to transmit only the same PS-DCI content associated with triggering DRX operation within a PDCCH cycle. The number of repetitions and the number of repetitions of the DCI format are transparent to the UE. In this case, if the UE detects the DCI format from one of N_MOs monitoring opportunities, the UE can skip PDCCH monitoring of the DCI format during the remaining monitoring opportunities in the cycle. Alternatively, the UE can assume that the UE-adapted DCI format used to trigger DRX operation is repeated during the N_MOs monitoring opportunities in the cycle.

[0539] When the number of PDCCH monitoring opportunities N_MOs within a cycle is greater than 1, multi-beam operation is supported to transmit the DCI format used to trigger UE-adapted operations associated with DRX operations. In multi-beam operation, the UE can determine the QCL assumption for N_MOs>1 PDCCH monitoring opportunities using one of the following examples.

[0540] In the first example, the UE may assume that the QCL assumption for transmitting the PDCCH in DCI format changes every C1 monitoring opportunity within the PDCCH cycle. In this case, at most The different QCL assumptions can be transparent to the UE. Optionally, they can be provided to the UE via higher-layer signaling. A list of TCI states to indicate when PDCCH monitoring should be performed. QCL hypotheses for subsets, where the i-th subset comes from the list (i = 0, 1, ..., ... The TCI status indicator has at most C1 monitoring opportunities for the i-th time (i = 0, 1, ..., ...). The QCL assumption for the subset. C1 is a positive integer and can be defined in the specification (e.g., C1 = 1) or provided to the UE via higher-level signaling.

[0541] In the second example, the UE may assume a QCL assumption cycle for transmitting DCI-formatted PDCCHs at every C1 monitoring opportunity within the PDCCH cycle. In this case, this can be provided to the UE via higher-layer signaling. A list of TCI states is provided, and the index I_0 of the first TCI state can be provided to the UE via higher-layer signaling. The UE can determine the i-th of up to C1 monitoring opportunities (i = 0, 1, ...) based on I_0. The QCL assumptions for a subset of (I_0+i) TCI states from this list indicate the QCL assumptions for the i-th subset of at most C1 monitoring opportunities. I_0 can be reconfigured by MACCE. C1 is a positive integer and can be defined in the specification (e.g., C1=1) or provided to the UE via higher-layer signaling.

[0542] In the third example, the UE may assume that N_MOs equals the number of SS / PBCH blocks actually transmitted as determined by ssb-PositionsInBurst in SIB1. The i-th PDCCH monitoring opportunity in the DCI format within the period corresponds to the i-th transmitted SS / PBCH block and is quasi-in-position with the i-th transmitted SS / PBCH block. The QCL type between the i-th transmitted SS / PBCH block and the i-th PDCCH monitoring opportunity can be QCL-TypeA / QCL-TypeB / QCL-TypeC / QCL-TypeD and can be provided to the UE via higher-layer signaling.

[0543] Figure 26 This illustration shows various embodiments of the present disclosure of triggering multi-beam transmission on a UE-adapted DCI format associated with DRX operation via N_MOs > 1 PDCCH monitoring opportunity per PDCCH monitoring cycle. UE (such as Figure 3 UE 116 can be configured with a search space set in DCI format for sending UE-adapted data that triggers DRX operations.

[0544] The UE can configure N_MOs>1 PDCCH monitoring opportunities 2601 and 2602 within the PDCCH monitoring period 2605. The UE expects to repeat the DCI format used to trigger UE adaptive adaptation associated with DRX operation on N_MOs>=1 PDCCH monitoring opportunities within the PDCCH monitoring period. The QCL assumptions for N_MOs>1 PDCCH monitoring opportunities can be different, for example, with beam orientation or different spatial parameters.

[0545] For PDCCH monitoring timings used to send PS-DCI to trigger UE-adapted DRX ON durations associated with DRX operation, when the monitoring timing overlaps with the activity time of a previous DRX cycle (such as subsequent ones)... Figure 27 As shown), the UE skips the PDCCH monitoring timing. In another method, when the monitoring timing overlaps with the activity of a previous DRX cycle (such as...), the UE skips the PDCCH monitoring timing. Figure 28 (As shown) and under any of the following conditions, the UE skips the PDCCH monitoring opportunity:

[0546] Condition 1: The activity time of the previous DRX cycle overlaps with the next DRX cycle associated with PS-DCI.

[0547] Condition 2: If the UE monitors / decodes PS-DCI, the total number of DCI sizes exceeds the DCI size budget.

[0548] Condition 3: The offset between the monitoring timing and the next DRX ON duration associated with PS-DCI is less than the threshold K_threshold. K_threshold can be defined in the system operation specification (e.g., K_threshold = 1 slot) or provided to the UE via higher-layer signaling.

[0549] Condition 4: If the UE monitors / decodes PS-DCI, the number of PDCCHs decoded exceeds the PDCCH blind decoding capability.

[0550] When the UE should not monitor PS-DCI, the gNB can send virtual bits in the field associated with the UE. In one example, the virtual bits can be all zeros or all 1s.

[0551] Figure 27 A schematic diagram illustrating the timing of PDCCH monitoring outside the DRX ON duration overlapping with the dynamic activity time of a previous DRX cycle, according to various embodiments of this disclosure. Monitoring can be performed by the UE (such as...) Figure 3 Execute in UE 116.

[0552] The UE can determine PDCCH monitoring opportunities 2703 and 2704 outside of the DRX ON durations 2705 and 2706. When the DRX cycle activity time is extended (e.g., drx-InactivityTimer 2707 restarts) and the extended activity time of the DRX cycle overlaps with the PDCCH monitoring opportunity 2704 associated with the next DRX cycle, the UE can skip monitoring the overlapping PDCCH monitoring opportunity 2704, and the UE assumes that no DCI format has been sent to trigger UE adaptation associated with DRX operation.

[0553] For PDCCH monitoring opportunities that are outside the DRX ON duration and are used to send PS-DCI to trigger UE adaptation associated with the next or one more DRX cycle, the UE may skip monitoring the PDCCH monitoring opportunity if it detects a DCI format in a previous PDCCH monitoring opportunity that indicates that the UE should sleep or skip PDCCH monitoring in the associated DRX cycle.

[0554] Figure 28 A schematic diagram illustrating various embodiments of the present disclosure of skipping the monitoring timing of PS-DCI is shown. Skipping the monitoring timing can be achieved by the UE (such as...) Figure 3Execute in UE 116.

[0555] The UE can configure PS-DCI monitoring opportunities 2801 and 2803 before DRX ON durations 2802 and 2804. This can instruct the UE to skip at least one PDCCH monitoring session in the USS set for more than one DRX ON duration. When the UE is instructed by the PS-DCI in monitoring opportunity 2801 to skip DRX ON durations 2802 and 2804, the UE can skip the PS-DCI monitoring opportunity 2803. When the UE should not monitor PS-DCI, the gNB can send a virtual bit in the field associated with the UE. In one example, the virtual bit can be all 0s or all 1s.

[0556] For N_MOs >= 1 PDCCH monitoring opportunities outside the DRX ON duration or active time for transmitting PS-DCI to trigger UE adaptation associated with DRX operation, if there is partial overlap between the SS / PBCH block and the N_MOs PDCCH monitoring opportunities, the UE may begin monitoring PDCCH at the first PDCCH monitoring opportunity after the SS / PBCH block. Overlapping PDCCH opportunities may be skipped, but they are still counted as PDCCH monitoring opportunities when the UE determines the index of the PDCCH monitoring opportunity. Optionally, when there is overlap between the SS / PBCH block and the N_MOs PDCCH monitoring opportunities, the first opportunity after the SS / PBCH block may be counted as the first PDCCH monitoring opportunity, and the UE may monitor up to N_MOs consecutive PDCCH monitoring opportunities before the start of the associated first DRX ON duration.

[0557] Determine the timing for PDCCH monitoring to trigger UE adaptations unrelated to DRX operation.

[0558] Another embodiment of this disclosure relates to determining the timing for monitoring physical layer signals / channels to trigger UE adaptations unrelated to DRX operation in the RRC_CONNECTED state. For example, the signals / channels could be in DCI format transmitted to the UE via PDCCH.

[0559] The UE can configure PDCCH-based signals / channels in the search space set s to trigger UE adaptation unrelated to DRX operation in the RRC_CONNECTED state. The UE can determine the PDCCH monitoring timing on the active DL BWP based on the PDCCH monitoring period, PDCCH monitoring offset, and PDCCH monitoring mode within the time slot. If Then the UE determines that the PDCCH monitoring opportunity for the signal / channel in the corresponding search space set s exists in the location numbered n. f The frame number is In the time slot (REF 1). When the corresponding search space set s is configured with a duration T s At that time, the UE is in the time slot The beginning of T s A continuous time-slot monitoring search space set s contains DCI formats, and under k s -T s The DCI format in the search space set s is not monitored in a continuous time slot.

[0560] The UE can determine the duration T based on the configured duration. s Given the PDCCH monitoring patterns within the associated search space set s, determine the number N_MOs of PDCCH monitoring opportunities per PDCCH monitoring cycle used to transmit the DCI format that triggers UE adaptation, such that N_MOs = T s *N^MOs_slot, where N^MOs_slot is the number of PDCCH monitoring opportunities within a slot indicated by the configured PDCCH monitoring mode, or the number of start OFDM symbols within a slot associated with the search space set s. The UE can expect to transmit only the same DCI format used to trigger UE adaptation within a PDCCH cycle. The number of repetitions of the DCI format is transparent to the UE. In this case, if the UE detects the DCI format from one of the N_MOs monitoring opportunities, the UE can skip PDCCH monitoring of the DCI format for the remaining monitoring opportunities within the cycle. Alternatively, the UE can assume that the DCI format used to trigger UE adaptation is repeated on N_MOs monitoring opportunities within the cycle.

[0561] Figure 29 The DCI format for repeatedly triggering UE adaptation during DRX activity time is illustrated according to various embodiments of this disclosure. UE (such as Figure 3 UE 116 can be configured with a search space set s for sending DCI formatted DCI that triggers UE adaptation independent of DRX operation.

[0562] The UE can configure N_MOs>1 PDCCH monitoring opportunities 2902 and 2903 within the PDCCH monitoring period 2901. The UE can assume that the DCI format used to trigger UE adaptive adaptation is repeated on N_MOs>=1 PDCCH monitoring opportunities. The QCL assumption for N_MOs>1 PDCCH monitoring opportunities is indicated by the active TCI status of the corresponding CORESET.

[0563] For a PDCCH monitoring timing that is used to send a DCI format that triggers the UE adaptation associated with the next one or more PDCCH monitoring cycles / timings, the UE may skip the PDCCH monitoring timing when it detects a DCI format that triggers the UE to skip at least one PDCCH monitoring in the associated PDCCH monitoring cycle / timing in a previous PDCCH monitoring timing.

[0564] Figure 30 A flowchart illustrating the process of determining a search space set for PDCCH monitoring according to various embodiments of the present disclosure is shown. The operation of process 3000 can be performed on a UE (such as...) Figure 3 Implemented in UE 116).

[0565] The process of process 3000 begins with operation 3002, which receives the configuration of the search space set, which includes the first set of indexes of the first set of search space set and the second set of indexes of the second set of search space set.

[0566] In operation 3004, determine the indication corresponding to the first set of indexes or the second set of indexes.

[0567] In operation 3006, the Physical Downlink Control Channel (PDCCH) is received according to either the first or second search space set. The process then terminates.

[0568] In some implementations, the process further includes receiving the PDCCH based on a shared search space. The PDCCH may include a downlink control information (DCI) format. The process also includes determining an indication based on field values ​​in the DCI format. In some implementations, the field values ​​in the DCI format are a first set of indices, and the indication is used only for the first set of indices.

[0569] In some implementations, the process further includes: receiving downlink control information (DCI) format from the PDCCH reception according to a first set of search space sets; and determining an indication for use only in a second set of indexes after the duration expires. The DCI format may include a duration field.

[0570] In some implementations, the configuration also includes a duration; the process also includes receiving the PDCCH based on a previous indication of the first set of indexes according to the first set of search space sets, and determining an indication to use it only for the second set of indexes after the duration expires.

[0571] In some implementations, the indication becomes effective at the beginning of the first time slot following the time period corresponding to the multiple symbols.

[0572] Figure 31A flowchart is shown of a method performed by a user equipment (UE) to determine a search space set for PDCCH monitoring according to various embodiments of the present disclosure.

[0573] In operation S3110, the UE may receive search space set information from the base station, the search space set information including a first set of indices for at least one search space set.

[0574] In some implementations, search space set information can be received via an RRC signal.

[0575] In some implementations, the search space set may correspond to the USS set or the Type3-PDCCH CSS set.

[0576] In operation S3120, the UE can monitor the physical downlink control channel (PDCCH) based on at least one search space set with a first set of indices.

[0577] In operation S3130, the UE can detect downlink control information (DCI) based on the monitored PDCCH, which indicates a handover to at least one search space set of the monitored PDCCH.

[0578] In some implementations, the DCI may include information indicating a second set of indices to switch to. Alternatively, the DCI may be received via the CSS (Shared Search Space).

[0579] In some implementations, DCI may include duration information for monitoring.

[0580] In some implementations, DCI may instruct the switching of at least one search space set currently being monitored to at least one other search space set.

[0581] In operation S3140, the UE can switch to at least one search space set with a second set of indexes based on the DCI.

[0582] In some implementations, the UE may begin monitoring the PDCCH based on at least one search space set having a second set of indices, according to the DCI. Alternatively, the UE may stop monitoring the PDCCH based on at least one search space set having a first set of indices, according to the DCI. For example, the UE may begin monitoring the PDCCH based on at least one search space set having a second set of indices, according to the DCI including information indicating a second set of indices to switch to.

[0583] In some implementations, the UE may begin monitoring the PDCCH according to at least one search space set with a second set of indexes after a predetermined time following the receipt of the DCI. For example, the UE may begin monitoring the PDCCH according to at least one search space set with a second set of indexes after a predetermined time following the receipt of the PDCCH, which includes a DCI (which includes information indicating a second set of indexes to switch to).

[0584] In some implementations, the UE may begin monitoring the PDCCH based on duration information indicated by the DCI, according to at least one search space set with a second set of indexes.

[0585] In some implementations, the UE may begin monitoring the PDCCH based on at least one other search space set corresponding to the second set of indices, based on the DCI. Alternatively, the UE may stop monitoring the PDCCH based on the currently monitored at least one search space set corresponding to the first set of indices, based on the DCI. For example, the UE may begin monitoring the PDCCH based on at least one other search space set corresponding to the second set of indices, based on a DCI indicating that the currently monitored at least one search space set should be switched to at least one other search space set.

[0586] In some implementations, the UE can receive timer information for switching at least one search space set via higher-layer signals. Alternatively, the UE can start monitoring the PDCCH based on at least one search space set with a second set of indices, starting with a timer.

[0587] Figure 32 A flowchart is shown of a method performed by a base station (BS) to determine a search space set for PDCCH monitoring, according to various embodiments of the present disclosure.

[0588] Due to the use of the above, including Figure 31 The accompanying diagrams explain the details, omitting redundant explanations.

[0589] In operation S3210, the BS may send search space set information to the user equipment, the search space set information including at least one first set of indexes for the search space set.

[0590] In operation S3220, the BS can send the Physical Downlink Control Channel (PDCCH) to the user equipment according to at least one search space set with a first set of indices.

[0591] In some implementations, the PDCCH may include downlink control information (DCI) indicating a switch to at least one search space set monitoring the PDCCH.

[0592] In some implementations, the DCI may include information indicating a second set of indices to switch to.

[0593] In some implementations, DCI may instruct the switching of at least one search space set currently being monitored to at least one other search space set.

[0594] In some implementations, DCI can be sent to the UE via CSS (Shared Search Space).

[0595] In some implementations, DCI may include duration information for monitoring.

[0596] Figure 33 A base station according to an embodiment of the present disclosure is illustrated schematically.

[0597] refer to Figure 33 The base station 3300 may include a processor 3310, a transceiver 3320, and a memory 3330. However, not all components shown are necessary. The base station 3300 may be composed of... Figure 33 The implementation can be carried out with more or fewer components. Alternatively, according to another embodiment, the processor 3310, transceiver 3320, and memory 3330 can be implemented as a single chip.

[0598] Base station 3300 can correspond to the aforementioned base station and gNB. For example, base station 3300 can correspond to... Figure 1 and Figure 2 gNB101, gNB102, and gNB103 are shown.

[0599] The aforementioned components will now be described in detail.

[0600] Processor 3310 may include one or more processors or other processing devices that control the proposed functions, processes, and / or methods. Operation of base station 3300 may be performed by processor 3310.

[0601] Transceiver 3320 may include an RF transmitter for up-converting and amplifying the transmitted signal, and an RF receiver for down-converting the frequency of the received signal. However, according to another embodiment, transceiver 3320 may be implemented with more or fewer components than those shown in the figures.

[0602] Transceiver 3320 can be connected to processor 3310 and send and / or receive signals. Signals may include control information and data. Additionally, transceiver 3320 can receive signals via a wireless channel and output signals to processor 3310. Transceiver 3320 can also transmit signals output from processor 3310 via a wireless channel.

[0603] The memory 3330 may store control information or data included in signals obtained by the base station 3300. The memory 3330 may be connected to the processor 3310 and stores at least one instruction or protocol or parameter for the proposed function, process and / or method. The memory 3330 may include read-only memory (ROM) and / or random access memory (RAM) and / or hard disk and / or CD-ROM and / or DVD and / or other storage devices.

[0604] Figure 34 A user equipment (UE) according to an embodiment of the present disclosure is shown.

[0605] refer to Figure 34 The UE 3400 may include a processor 3410, a transceiver 3420, and a memory 3430. However, not all components shown are necessary. The UE 3400 may be made from... Figure 34 The components shown can be implemented with more or fewer components. Alternatively, according to another embodiment, the processor 3410, transceiver 3420, and memory 3430 can be implemented as a single chip.

[0606] UE 3400 may correspond to the UE described above. For example, UE 3400 may correspond to... Figure 1 and Figure 3 The UEs shown are 111 to 116.

[0607] The aforementioned components will now be described in detail.

[0608] Processor 3410 may include one or more processors or other processing means for controlling the proposed functions, processes and / or methods. Operation of UE 3400 may be performed by processor 3410.

[0609] Transceiver 3420 may include an RF transmitter for up-converting and amplifying the transmitted signal, and an RF receiver for down-converting the received signal frequency. However, according to another embodiment, transceiver 3420 may be implemented with more or fewer components than those shown in the figures.

[0610] Transceiver 3420 can be connected to processor 3410 and send and / or receive signals. Signals may include control information and data. Additionally, transceiver 3420 can receive signals via a wireless channel and output signals to processor 3410. Transceiver 3420 can also transmit signals output from processor 3410 via a wireless channel.

[0611] The memory 3430 may store control information or data included in signals obtained by the UE 3400. The memory 3430 may be connected to the processor 3410 and store at least one instruction or protocol or parameter for the proposed function, process and / or method. The memory 3430 may include read-only memory (ROM) and / or random access memory (RAM) and / or hard disk and / or CD-ROM and / or DVD and / or other storage devices.

[0612] While this disclosure has been described using exemplary embodiments, various changes and modifications will be apparent to those skilled in the art. For example, this disclosure includes multiple embodiments that can be used in combination or together with each other, or individually. This disclosure is intended to cover such changes and modifications that fall within the scope of the appended claims. Nothing described in this application should be construed as implying that any particular element, step, or function is an essential element that must be included within the scope of the claims. The scope of the patent subject matter is defined only by the claims.

Claims

1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising: Search space information is received from the base station via higher-layer signaling. The search space information includes at least one search space group identifier of a group of multiple search space sets, wherein the search space group identifier indicates one of a plurality of group indexes, the plurality of group indexes including a first group index and a second group index. Based on multiple search space sets of a first group having the first set of indices, downlink control information (DCI) in the physical downlink control channel (PDCCH) is detected, wherein the DCI includes values ​​of a second group having the second set of indices indicating a search space set group switching; and Based on the DCI, the PDCCH is monitored according to multiple search space sets of the second group with the second group index.

2. The method according to claim 1, further comprising: Based on the DCI, monitoring of the PDCCH is stopped according to multiple search space sets of the first group with the first group index.

3. The method according to claim 1, in, The DCI is received via a shared search space (CSS), and The timer information for switching the search space set is received via the higher-level signaling.

4. The method according to claim 1, in, Monitoring the PDCCH based on multiple search space sets of the second group with the second group index includes: After a predetermined time following the receipt of the DCI, monitoring of the PDCCH begins based on multiple search space sets of the second group with the second group index.

5. The method according to claim 1, in, The DCI includes duration information for monitoring; as well as Monitoring the PDCCH based on multiple search space sets of the second group with the second group index includes: Based on the duration information indicated by the DCI, monitoring of the PDCCH begins according to multiple search space sets of the second group with the second group index.

6. A method performed by a base station (BS) in a wireless communication system, the method comprising: Search space information is sent to the user equipment (UE) via higher-layer signaling. The search space information includes at least one search space group identifier of a group of multiple search space sets, wherein the search space group identifier indicates one of a plurality of group indexes, the plurality of group indexes including a first group index and a second group index. Downlink control information (DCI) is transmitted to the UE via a physical downlink control channel (PDCCH) of multiple search space sets according to a first group having the first group index, wherein the DCI includes values ​​of a second group having the second group index indicating a search space set group handover; and Control information is sent to the UE via a PDCCH based on a plurality of search space sets of the second group having the second group index.

7. The method according to claim 6, further comprising: Send the DCI via shared search space CSS, and Timer information for switching the search space set is sent via the higher-level signaling.

8. The method according to claim 6, further comprising: The DCI, including duration information for monitoring, is transmitted. Specifically, based on the duration information indicated by the DCI, the UE begins to monitor the PDCCH according to multiple search space sets of the second group having the second group index.

9. A user equipment (UE) in a wireless communication system, comprising: transceiver; as well as At least one processor, coupled to the transceiver and configured to: Search space information is received from the base station via higher-layer signaling. The search space information includes at least one search space group identifier of a group of multiple search space sets, wherein the search space group identifier indicates one of a plurality of group indexes, the plurality of group indexes including a first group index and a second group index. Based on multiple search space sets of a first group having the first group index, downlink control information (DCI) in the physical downlink control channel (PDCCH) is detected, wherein the DCI includes values ​​of a second group having the second group index indicating a search space set group switching. as well as Based on the DCI, the PDCCH is monitored according to multiple search space sets of the second group with the second group index.

10. The UE according to claim 9, wherein, The at least one processor is further configured to: Based on the DCI, monitoring of the PDCCH is stopped according to multiple search space sets of the first group with the first group index.

11. The UE according to claim 9, wherein, The at least one processor is configured as follows: After a predetermined time following the receipt of the DCI, monitoring of the PDCCH begins based on multiple search space sets of the second group with the second group index.

12. The UE according to claim 9, wherein, The at least one processor is configured as follows: Based on the duration information indicated by the DCI, PDCCH monitoring begins according to multiple search space sets of the second group with the second group index.

13. A base station (BS) in a wireless communication system, comprising: transceiver; as well as At least one processor, coupled to the transceiver and configured to: Search space information is sent to the user equipment (UE) via higher-layer signaling. The search space information includes at least one search space group identifier of a group of multiple search space sets, wherein the search space group identifier indicates one of a plurality of group indexes, the plurality of group indexes including a first group index and a second group index. Downlink control information (DCI) is transmitted to the UE via a physical downlink control channel (PDCCH) of multiple search space sets according to a first group having the first group index, wherein the DCI includes values ​​of a second group having the second group index indicating a search space set group handover; and Control information is sent to the UE via a PDCCH based on a plurality of search space sets of the second group having the second group index.

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