Terminal devices, network devices, and methods

Abstract

To provide a method and device for communication that can evade some insignificant blind detection over a physical downlink control channel (PDCCH) and improve the efficiency of the PDCCH detection.SOLUTION: A method includes receiving, by a terminal device, at last one setting related to a first control resource set (CORESET) and a second CORESET. The at least one setting shows that the first CORESET is related to a first set of reference signals (RS) for beam fault detection (BFD) and the second CORESET is related to the first set or a second set of RS for BFD. The method also includes monitoring at least one PDCCH candidate based upon detection on a beam fault by evaluation of wireless link quality as to at least one of the first set of RS and the second set of RS.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to the field of telecommunications, and in particular, to communication methods, apparatuses, and computer storage media.

Background Art

[0002] Recently, there has been discussion about enhancing support for the introduction of multi-transmit and receive points (multi-TRPs). For example, using multi-TRPs and / or multi-panels based on the reliability characteristics of Release 16, it has been proposed to identify and specify characteristics for improving the reliability and robustness of physical channels other than the physical downlink shared channel (PDSCH), such as the physical downlink control channel (PDCCH), the physical uplink shared channel (PUSCH), and / or the physical uplink control channel (PUCCH). Also, the identification and specification of features enabling inter-cell multi-TRP operation have been proposed. Further, it has been proposed to evaluate and identify enhancements related to beam management for multi-TRP transmissions that are simultaneous with multi-panel reception.

[0003] To improve the reliability and robustness of the PDCCH, many schemes have been agreed upon to realize PDCCH transmission using multiple transmission configuration indication (TCI) states (corresponding to different beams). Beam blockage may affect the reliability and robustness of the PDCCH. Therefore, when implementing the above schemes, it is necessary to consider the impact of beam blockage.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Generally, exemplary embodiments of the present disclosure provide communication methods, apparatuses, and computer storage media.

Means for Solving the Problems

[0005] In a first embodiment, a communication method is provided. The method includes receiving at least one setting relating to a first control resource set (CORESET) and a second CORESET in a terminal device, the at least one setting indicating that the first CORESET is associated with a first set of reference signals (RS) for beam fault detection (BFD) and the second CORESET is associated with either the first set of RS or a second set of RS for BFD; and monitoring at least one PDCCH candidate based on beam fault detection by evaluating the radio link quality for at least one of the first set of RS and the second set of RS.

[0006] In a second embodiment, a communication method is provided. The method includes receiving at least one setting relating to a CORESET in a terminal device, the at least one setting indicating that the CORESET is associated with a plurality of sets of reference signals (RS) for beam fault detection (BFD), that the CORESET is associated with a first transmission configuration indicator (TCI) state and a second TCI state, that PDCCH candidates in a search space associated with the CORESET are associated with the first TCI state and a second TCI state, and monitoring PDCCH candidates based on beam fault detection by evaluating radio link quality for at least one of the plurality of sets of RS.

[0007] In a third embodiment, a communication method is provided, the method comprising receiving at least one setting in a terminal device relating to at least one control resource set (CORESET), the at least one setting indicating that the at least one CORESET is associated with at least one set of reference signals (RS) for beam fault detection (BFD), and not monitoring any PDCCH candidates in the at least one CORESET in response to beam fault detection being detected by evaluating the radio link quality for at least one RS included in the at least one set of RS.

[0008] In a fourth embodiment, a terminal device is provided. The terminal device comprises a processor and a memory coupled to the processor. The memory stores instructions, when executed by the processor, that cause the terminal device to perform the methods described in the first, second, or third embodiments of the present disclosure.

[0009] In a fifth embodiment, a computer-readable medium storing instructions is provided. When the instructions are executed on at least one processor, they cause that at least one processor to perform the method described in the first, second, or third embodiment of the present disclosure.

[0010] In a sixth embodiment, a computer program product is provided which includes machine-executable instructions stored on a computer-readable medium. When such machine-executable instructions are executed, the machine is made to perform the method described in the first, second, or third embodiment of this disclosure.

[0011] It should be understood that the summary portion of the invention is not intended to identify any important or fundamental features of the embodiments of this disclosure, nor to limit the scope of this disclosure. Other features of this disclosure will be readily apparent from the following description. [Brief explanation of the drawing]

[0012] Some embodiments of the present disclosure will be described in more detail in the drawings to further clarify the above and other objects, features, and advantages of the present disclosure.

[0013] [Figure 1] It is a diagram showing an exemplary communication network in which embodiments of the present disclosure can be implemented.

[0014] [Figure 2] It is a flowchart of an exemplary method according to some embodiments of the present disclosure.

[0015] [Figure 3] It is a flowchart of an exemplary method according to some embodiments of the present disclosure.

[0016] [Figure 4] It is a flowchart of an exemplary method according to some embodiments of the present disclosure.

[0017] [Figure 5] It is a schematic block diagram of a device suitable for realizing embodiments of the present disclosure.

[0018] In the figure, the same or similar reference numerals represent the same or similar elements.

Embodiments for Carrying out the Invention

[0019] Here, the principles of the present disclosure will be explained with reference to some exemplary embodiments. It should be understood that these embodiments are described for illustrative purposes only and are intended to assist those skilled in the art in understanding and implementing the present disclosure, without suggesting any limitation regarding the scope of the present disclosure. The disclosure content described in this specification can be implemented in various ways different from the methods described below.

[0020] In the following description and claims, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art of the present disclosure.

[0021] As used herein, the singular forms "a", "an", and "the" include the plural forms as well, unless the context clearly dictates otherwise. The terms "comprising", "including", and variations thereof are to be construed as open-ended terms meaning "including, but not limited to". The term "based on" is to be construed as "based at least in part on". The terms "some embodiments" and "embodiments" are to be construed as "at least some embodiments". The term "another embodiment" is to be construed as "at least one other embodiment". The terms "first", "second", etc. can refer to different or the same object. Other explicit and implicit definitions may be included hereinafter.

[0022] In some instances, values, procedures, or devices are referred to as "best", "lowest", "highest", "minimum", "maximum", etc. Such descriptions are intended to indicate that a selection can be made from among a number of available functional alternatives, and it will be understood that such selection need not be better, smaller, higher, or otherwise more preferred than other selections.

[0023] As used herein, the term “circuit” can mean a hardware circuit and / or a combination of a hardware circuit and software. For example, a circuit may be a combination of an analog and / or digital hardware circuit and software / firmware. In yet another example, a circuit may be any part of a hardware processor having a digital signal processor, software and one or more memories, which work together to cause a device such as a terminal or network device to perform various functions. In yet another example, a circuit may be a hardware circuit and / or a processor such as a microprocessor or a part thereof that requires software / firmware for operation, but the software may not be present if it is not required for operation. As used herein, the term “circuit” also includes a hardware circuit or one or more processors alone, or a part of a hardware circuit or one or more processors, and the implementation of its (or their) accompanying software and / or firmware.

[0024] As described above, several schemes have been agreed upon to improve the reliability and robustness of PDCCH. For example, in a non-single frequency network (non-SFN) scheme, two search space (SS) sets associated with the corresponding control resource set (CORESET) can be enabled for PDCCH iterations to enable PDCCH transmission using two transmit setting instruction (TCI) states (e.g., corresponding to different beams). PDCCH candidates in the two CORESETs may be linked together to transmit iterations of the same PDCCH. In another example, in an SFN scheme, one CORESET or one or more SS sets within one CORESET may be configured to have two TCI states (e.g., corresponding to different beams). That is, one PDCCH candidate in a given SS set is associated with both TCI states of the CORESET.

[0025] Beam failures can affect the reliability and robustness of the PDCCH. Therefore, the effects of beam failures must be considered when implementing the above schemes. However, the behavior of terminal equipment in the case of partial beam failures (for example, some beams are failed but others are not, or some beams or reference signals associated with one TRP are failed but some beams or reference signals associated with another TRP are not) is not yet specified for these schemes.

[0026] Embodiments of this disclosure provide solutions to the above-mentioned problems and / or one or more other potential problems. According to these solutions, the behavior of the terminal device in the case of partial beam failure is defined under different schemes for improving PDCCH reliability. Furthermore, some meaningless blind detection of PDCCH can be avoided, thereby improving the efficiency of PDCCH detection.

[0027] In the following, the terms "PDCCH monitoring occasion," "PDCCH transmission occasion," "PDCCH transmission," "PDCCH candidate," "PDCCH reception occasion," and "PDCCH repetition" can be used interchangeably. The characters "monitoring," "detection," and "decoding" can also be used interchangeably.

[0028] Figure 1 shows an exemplary communication network 100 capable of implementing embodiments of the present disclosure. As shown in Figure 1, the network 100 includes a network device 110 coupled to two TRP / panels 120-1 and 120-2 (collectively referred to as TRP120, or individually as TRP120). The network 100 further includes terminal devices 130 served by the network device 110. It should be understood that the numbers of network devices, terminal devices, and TRPs shown in Figure 1 are for illustrative purposes only and do not imply any limitation. The network 200 may have any suitable number of devices suitable for implementing embodiments of the present disclosure.

[0029] As used in this text, the term “terminal device” means any device having wireless or wired communication capabilities. Examples of terminal devices include, but are not limited to, user devices (UEs), personal computers, desktop computers, mobile phones, cellular phones, smartphones, personal digital assistants (PDAs), portable computers, tablets, wearable devices, Internet of Things (IoT) devices, any Internet of Things (IoE) devices, machine-type communication (MTC) devices, and in-vehicle devices for V2X communication, where the “X” in V2X represents pedestrians, vehicles or infrastructure / networks, or image acquisition devices such as digital cameras, game devices, music storage and playback devices, or internet-connected home appliances that enable wireless or wired internet access and browsing. For illustrative purposes, several embodiments of terminal device 130 will be described below with reference to a UE as an example.

[0030] As used in this text, the terms “network device” or “base station” (BS) mean a device capable of providing or hosting a cell or coverage on which terminal devices can communicate. Examples of network devices include, but are not limited to, Node B (NodeB or NB), Evolutionary Node B (eNodeB or eNB), Next Generation Node B (gNB), Remote Radio Unit (RRU), Radio Head (RH), Remote Radio Head (RRH), Femtonode, piconode, and other low-power nodes. The term “TRP” means an antenna array (having one or more antenna elements) available to a network device located at a particular geographical location. For example, a network device may be coupled with multiple TRPs at different geographical locations to achieve better coverage.

[0031] In one embodiment, the terminal device 130 may be connected to a first network device and a second network device (not shown in Figure 1). One of the first and second network devices may be in the master node and the other in the secondary node. The first and second network devices may use different radio access technologies (RATs). In one embodiment, the first network device may be a first RAT device, and the second network device may be a second RAT device. In one embodiment, the first RAT device may be an eNB, and the second RAT device may be a gNB. Information regarding different RATs can be transmitted to the terminal device 130 from at least one of the first and second network devices. In one embodiment, the first information may be transmitted from the first network device to the terminal device 130, and the second information may be transmitted from the second network device directly or via the first network device to the terminal device 130. In one embodiment, information regarding the settings of the terminal device set by the second network device can be transmitted from the second network device via the first network device. Information regarding the reconfiguration of a terminal device set by the second network device can be transmitted from the second network device directly to the terminal device or via the first network device. The information may be transmitted via radio resource control (RRC) signaling, media access control (MAC) control elements (CE), or downlink control information (DCI).

[0032] As shown in Figure 1, the network device 110 may communicate with the terminal device 130 via TRPs 120-1 and 120-2. Each TRP 120 can provide multiple beams for communication with the terminal device 130. For example, TRP 120-1 may include four beams 121-1, 121-2, 121-3, and 121-4 (collectively referred to as "beam 121" or individually as "beam 121"), while TRP 120-2 may include four beams 122-1, 122-2, 122-3, and 122-4 (collectively referred to as "beam 122" or individually as "beam 122"). It should be understood that the number of beams shown in Figure 1 is given for illustrative purposes only and does not imply any limitation. TRP 120 can provide any suitable number of beams suitable for carrying out embodiments of the present disclosure.

[0033] Communications in Network 100 can comply with any appropriate standard, including but not limited to New Radio Access (NR), Long-Term Evolution (LTE), LTE-Evolution, LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA®), Code Division Multiple Access (CDMA), and Global System for Mobile Communications (GSM). Furthermore, communications can be performed according to any generation of communication protocol currently known or to be developed in the future. Examples of communication protocols include, but are not limited to, first-generation (1G), second-generation (2G), 2.5G, 2.75G, third-generation (3G), fourth-generation (4G), 4.5G, and fifth-generation (5G) communication protocols.

[0034] In some embodiments, a beam failure may occur if, due to incorrect beam alignment or for any other reason, the network device 110 becomes unable to reach the terminal device 130 via at least one control channel (e.g., PDCCH) or at least one RS. For example, the terminal device 130 can detect this situation by estimating the quality of a hypothetical PDCCH reception transmitted over the beam that the network device 110 uses to reach the terminal device 130 (e.g., the beam from TRP 120-1 or 120-2). To perform BFD, the terminal device 130 may estimate the quality of a hypothetical PDCCH reception based on the Layer 1 reference signal received power (L1-RSRP) or Layer 1 signal-to-interference noise ratio (L1-SINR) of a reference signal (RS). Hereinafter, this reference signal may be referred to as "BFD RS" or "RS of BFD". Examples of BFD RS may include, but are not limited to, a periodic channel state information reference signal (CSI-RS), a synchronization signal block (SSB), or a combination thereof.

[0035] In NR, for each bandwidth portion of the serving cell, the terminal device 130 is:

number

number

number

number

number

[0036] As described above, in non-SFN schemes, PDCCH iterations can be enabled to improve the reliability and robustness of PDCCH. Figure 2 is a flowchart of an exemplary non-SFN scheme method 200 according to some embodiments of the present disclosure. Method 200 can be implemented in a terminal device 130 as shown in Figure 1.

[0037] As shown in Figure 2, in block 210, terminal device 130 receives at least one setting relating to the first CORESET and the second CORESET from network device 110.

[0038] In some embodiments, the at least one setting can configure a first set of search spaces associated with a first CORESET. In some embodiments, the at least one setting can configure a second set of search spaces associated with a second CORESET. In some embodiments, the at least one setting can configure a first set of PDCCH candidates in the first search space of the first set of search spaces. In some embodiments, the at least one setting can configure a second set of PDCCH candidates in the second search space of the second set of search spaces. In some embodiments, the at least one setting may be configured such that a first PDCCH candidate in the first search space of the first set of search spaces associated with a first CORESET is linked, associated, or related to a second PDCCH candidate in the second search space of the second set of search spaces associated with a second CORESET. For example, a terminal device knows the link or association or relationship of the PDCCH or DCI in the first and second PDCCH candidates before decoding them. In some embodiments, the first and second PDCCH candidates may be used for PDCCH iterations. For example, encoding and / or rate matching of a PDCCH in the first and / or second PDCCH candidate or a DCI in the PDCCH is based on one iteration (e.g., a PDCCH in one of the first and second PDCCH candidates or a DCI in the PDCCH). For example, the same encoded bits are iterated for other iterations. In another example, each iteration has the same number of control channel elements (CCEs) and encoded bits and corresponds to the same DCI payload. In some embodiments, the at least one setting may indicate that the first CORESET is associated with a first set of RSs in the BFD, and the second CORESET is associated with a first set of RSs or a second set of RSs in the BFD. In some embodiments, the first CORESET may be associated with a first set of RSs in the BFD without any setting, and the second CORESET may be associated with a first set of RSs or a second set of RSs in the BFD without any setting.In some embodiments, the at least one setting may be transmitted / received via at least one of the RRC signaling, MAC CE, and DCI. In some embodiments, at least one of the first set of RSs and the second set of RSs may be set via at least one of the RRC signaling, MAC CE, and DCI. In some embodiments, neither the first set of RSs nor the second set of RSs may be set via at least one of the RRC signaling, MAC CE, and DCI.

[0039] In some embodiments, the first CORESET and the second CORESET may be associated with two different sets of RSs in BFD. For example, the first CORESET (also referred to as "CORESET A") may be associated with a first set of RSs in BFD (also referred to as "BFD RS set S1"), and the second CORESET (also referred to as "CORESET B") may be associated with a second set of RSs in BFD (also referred to as "BFD RS set S2"). In some embodiments, the number of RSs in BFD RS set S1 may be any of {1, 2, 3, 4}. The number of RSs in BFD RS set S2 may be any of {1, 2, 3, 4}. In some embodiments, CORESET A may be associated with a first value of identity (ID), and CORESET B may be associated with a second value of ID. For example, CORESET A may be configured to have ID=X and CORESET B may have ID=Y, where X and Y may be selected from a value set W, W={N / A,0,1}. For example, X may be different from Y. For example, ID may be the same as CORESETPoolIndex. That is, two different BFS RS sets S1 and S2 are associated with CORESETs having different values ​​of CORESETPoolIndex.

[0040] In some embodiments, a first CORESET (i.e., CORESET A) and a second CORESET (i.e., CORESET B) may be associated with one set of RS values ​​in the BFD. In some embodiments, CORESET A and CORESET B may be associated with the same ID value (e.g., ID1). In this case, for example, CORESET A and CORESET B may be set to have ID1 = X or Y, where X and Y may be selected from a value set W, where W = {N / A, 0, 1}. For example, CORESET A and CORESET B may be associated with a BFD RS set from either S1 or S2. In some embodiments, CORESET A and CORESET B may be associated with the same ID value (e.g., ID2). For example, ID2 may have a value different from any of the values ​​in the value set W. For example, ID2 may be 2 or 3. In this case, for example, CORESET A and CORESET B may be associated with an independent BFD RS set such as S3, which is different from both S1 and S2. For example, BFD RS set S3 may contain up to two RSs, each RS may be QCL'd or associated with the TCI state of CORESET A or CORESET B. For example, for each set / pair of CORESETs having linked search space sets or linked PDCCH candidates, there may be an associated independent BFD RS set.

[0041] In block 220, the terminal device 130 monitors at least one PDCCH candidate based on detection of beam faults by evaluating the radio link quality for at least one of the first set of RSs and the second set of RSs.

[0042] In some embodiments, the wireless link quality of all corresponding resource settings in at least one BFD RS set (e.g., S1, S2, or S3), or the wireless link quality of at least one corresponding resource setting in the BFD RS set (e.g., S3) used by the terminal device 130 to evaluate the wireless link quality, is set to threshold Q. out,LR If the result is worse, it means that the BFD RS set is failing or one TRP / link is failing.

[0043] In some embodiments, CORESET A and CORESET B may be associated with two different BFD RS sets S1 and S2, respectively. In some embodiments, if no beam fault is detected for either S1 or S2, the terminal device 130 may monitor at least one of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, if a beam fault is detected for at least one of S1 or S2, the terminal device 130 may monitor either the first PDCCH candidate or the second PDCCH candidate. In some embodiments, if a beam fault is detected for at least one of S1 or S2, the terminal device 130 may not monitor either the first PDCCH candidate or the second PDCCH candidate. For example, if a beam fault is detected for S2, the terminal device 130 may monitor the first PDCCH candidate without monitoring the second PDCCH candidate. In another example, if a beam fault is detected for S2, the terminal device 130 may decide not to monitor the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the second PDCCH candidate. Alternatively, or additionally, if a beam fault is detected for S1, the terminal device 130 may monitor the second PDCCH candidate without monitoring the first PDCCH candidate. Alternatively, or additionally, if a beam fault is detected for S1, the terminal device 130 may decide not to monitor the first PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the first PDCCH candidate. Alternatively, or additionally, if a beam fault is detected for at least one of S1 and S2, the terminal device 130 may not monitor either the first PDCCH candidate or the second PDCCH candidate. Alternatively, or in addition, if a beam fault is detected in at least one of S1 and S2, the terminal device 130 may decide not to monitor either the first PDCCH candidate or the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the first PDCCH candidate and the second PDCCH candidate.

[0044] In some embodiments, CORESET A and CORESET B may be associated with a single BFD RS set (e.g., S1, S2, or S3). The BFD RS set may include a first RS and a second RS. In some embodiments, if a beam fault is detected for the second RS, the terminal device 130 may monitor the first PDCCH candidate instead of the second PDCCH candidate. Alternatively, or additionally, if a beam fault is detected for the second RS, the terminal device 130 may decide not to monitor the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the second PDCCH candidate. In some embodiments, if a beam fault is detected for the first RS, the terminal device 130 may monitor the second PDCCH instead of the first PDCCH candidate. If a beam fault is detected for the first RS as an alternative or additional measure, the terminal device 130 may decide or determine not to monitor the first PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the first PDCCH candidate. If a beam fault is detected for at least one of the first RS and the second RS as an alternative or additional measure, the terminal device 130 may not monitor either the first PDCCH candidate or the second PDCCH candidate. If a beam fault is detected for at least one of the first RS and the second RS as an alternative or additional measure, the terminal device 130 may decide or determine not to monitor either the first PDCCH candidate or the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the first PDCCH candidate or the second PDCCH candidate.

[0045] In some embodiments, the terminal device 130 may decode / detect a DCI associated with at least one of a first PDCCH candidate, a second PDCCH candidate, and a combination of the first PDCCH candidate and the second PDCCH candidate.

[0046] In some embodiments, CORESET A and CORESET B may be associated with two different BFD RS sets S1 and S2, respectively. In some embodiments, if no beam fault is detected for either S1 or S2, the terminal device 130 may decode / detect a DCI associated with at least one of the first PDCCH candidate, the second PDCCH candidate, and a combination of the first and second PDCCH candidates. In some embodiments, if a beam fault is detected for at least one of S1 or S2, the terminal device 130 may decode / detect a DCI associated with one of the first and second PDCCH candidates. For example, if a beam fault is detected for S1, the terminal device 130 may decode / detect a DCI associated with the second PDCCH candidate without decoding the DCI associated with the first PDCCH candidate. In another example, if a beam fault is detected for S1, the terminal device 130 may decide not to decode / detect the DCI associated with the first PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the first PDCCH candidate. In some embodiments, if a beam fault is detected for S1, the terminal device 130 may decode / detect the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate by setting the weight associated with the first PDCCH candidate to 0. In some embodiments, if a beam fault is detected for S2, the terminal device 130 may decode / detect the DCI associated with the second PDCCH candidate without decoding the DCI associated with the first PDCCH candidate. For example, if a beam fault is detected for S2, the terminal device 130 may decide not to decode / detect the DCI associated with the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the second PDCCH candidate.In some embodiments, if a beam fault is detected for S2, the terminal device 130 may decode / detect the DCI associated with the combination of the first and second PDCCH candidates by setting the weight associated with the second PDCCH candidate to 0. In some embodiments, if a beam fault is detected for at least one of S1 and S2, the terminal device 130 may not decode / detect the DCI associated with either the first or second PDCCH candidate. For example, if a beam fault is detected for at least one of S1 and S2, the terminal device 130 may decide not to decode / detect the DCI associated with either the first or second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with either the first or second PDCCH candidate. Alternatively, if a beam fault is detected for at least one of S1 and S2, the terminal device 130 may not decode / detect the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. For example, if a beam fault is detected for at least one of S1 and S2, the terminal device 130 may decide not to decode / detect the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate.

[0047] In some embodiments, CORESET A and CORESET B may be associated with a single BFD RS (e.g., S1, S2, or S3). The BFD RS set may include a first RS and a second RS. In some embodiments, if no beam fault is detected for either the first RS or the second RS, the terminal device 130 may decode / detect a DCI associated with at least one of the first PDCCH candidate, the second PDCCH candidate, or a combination of the first and second PDCCH candidates. In some embodiments, if a beam fault is detected for at least one of the first RS or the second RS, the terminal device 130 may decode / detect a DCI associated with one of the first and second PDCCH candidates. In some embodiments, if a beam fault is detected for the first RS, the terminal device 130 may decode / detect the DCI associated with the second PDCCH candidate without decoding the DCI associated with the first PDCCH candidate. In some embodiments, if a beam fault is detected for the first RS, the terminal device 130 may decide not to decode / detect the DCI associated with the first PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the first PDCCH candidate. In some embodiments, if a beam fault is detected for the first RS, the terminal device 130 may decode the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate by setting the weight associated with the first PDCCH candidate to 0. In some embodiments, if a beam fault is detected for the second RS, the terminal device 130 may decode the DCI associated with the first PDCCH candidate without decoding the DCI associated with the second PDCCH candidate. In some embodiments, if a beam fault is detected for the second RS, the terminal device 130 may decide not to decode / detect the DCI associated with the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the second PDCCH candidate.In some embodiments, if a beam fault is detected for the second RS, the terminal device 130 may decode the DCI associated with the combination of the first and second PDCCH candidates by setting the weight associated with the second PDCCH candidate to 0. In some embodiments, if a beam fault is detected for at least one of the first and second RSs, the terminal device 130 may not decode the DCI associated with either the first or second PDCCH candidate. For example, if a beam fault is detected for at least one of the first and second RSs, the terminal device 130 may decide not to decode / detect the DCI associated with either the first or second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with either the first or second PDCCH candidate. In some embodiments, if a beam fault is detected for at least one of the first RS and the second RS, the terminal device 130 does not need to decode the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. For example, if a beam fault is detected for at least one of the first RS and the second RS, the terminal device 130 may decide not to decode / detect the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate.

[0048] In some embodiments, the terminal device 130 may receive both a first set of RS (i.e., S1) and a second set of RS (i.e., S2) via at least one of the radio resource control (RRC) signaling, the media access control (MAC) control element (CE), and the DCI. Alternatively, the terminal device 130 may not receive either the first set of RS or the second set of RS via at least one of the RRC signaling, the MAC CE, and the DCI. Alternatively, the terminal device 130 may receive only the first set of RS via at least one of the RRC signaling, the MAC CE, and the DCI, or the terminal device 130 may not receive the first set of RS via at least one of the RRC signaling, the MAC CE, and the DCI. Alternatively, terminal device 130 may receive only the second set of RS signals via at least one of RRC signaling, MAC CE, and DCI, or terminal device 130 may not receive the second set of RS signals via at least one of RRC signaling, MAC CE, and DCI. In some embodiments, terminal device 130 may receive both the first RS and the second RS signals via at least one of RRC signaling, MAC CE, and DCI. Alternatively, terminal device 130 may not receive either the first RS or the second RS signals via at least one of RRC signaling, MAC CE, and DCI. Alternatively, terminal device 130 may receive only the first RS via at least one of RRC signaling, MAC CE, and DCI, or terminal device 130 may not receive the first RS via at least one of RRC signaling, MAC CE, and DCI. Alternatively, terminal device 130 may receive only the second RS via at least one of RRC signaling, MAC CE, and DCI, or terminal device 130 may not receive the second RS via at least one of RRC signaling, MAC CE, and DCI.

[0049] In some embodiments, if the first set of RS is not received by the terminal device 130, the terminal device 130 may determine the first set of RS based on a third set of RS indicated in the first TCI state for the first CORESET, and one of the third set of RS indicated in the first TCI state for the first CORESET and a fourth set of RS indicated in the second TCI state for the second CORESET. In some embodiments, if the second set of RS is not received by the terminal device 130, the terminal device 130 may determine the second set of RS based on a fourth set of RS indicated in the second TCI state for the second CORESET. In some embodiments, if the first RS is not received by the terminal device 130, the terminal device 130 may determine the first RS based on a third set of RSs indicated in the first TCI state for the first CORESET, and any one of the third set of RSs indicated in the first TCI state for the first CORESET and a fourth set of RSs indicated in the second TCI state for the second CORESET. In some embodiments, if the second RS is not received by the terminal device 130, the terminal device 130 may determine the second RS based on a fourth set of RSs indicated in the second TCI state for the second CORESET.

[0050] In some embodiments, for a PDCCH iteration scheme, if a beam failure occurs, the terminal device 130 may identify two new beams or two RSs. For example, two CSI-RS setting indices, or two SS / PBCH block indices, or one CSI-RS setting index and one SS / PBCH block index. In some embodiments, if CORESET A and CORESET B are associated with the same BFD RS set, the terminal device 130 may, in the upper layer, identify at least two periodic CSI-RS setting indices or two SS / physical broadcast channel (PBCH) block indices or at least one periodic CSI-RS setting index and one SS / physical broadcast channel (PBCH) block index from the new beam candidate set q1, and Q in,LR Indicates whether there are corresponding L1-RSRP measurements that are above the threshold, and if so, two periodic CSI-RS setting indices and / or two SS / PBCH block indices and / or one periodic CSI-RS setting index and one SS / PBCH block index from set q1 and Q in,LR A corresponding L1-RSRP measurement value that is above the threshold may be provided. For candidate RS IDs, both the first and second fields are set to the index of an SSB in the candidate beamlist where the SS-RSRP is higher than the rsrp-ThresholdBFR, or to the index of a CSI-RS in the candidate beamlist where the CSI-RSRP is higher than the rsrp-ThresholdBFR. The index of the SSB or CSI-RS is the index of the entry in the candidate beamlist corresponding to that SSB or CSI-RS. Index 0 corresponds to the first entry in the candidate beamlist, index 1 corresponds to the second entry in the list, and so on. The length of this field is 12 bits.

[0051] In some embodiments, CORESET A and CORESET B may each be associated with two different BFD RS sets, for example, a first set of RSs (i.e., S1) and a second set of RSs (i.e., S2). In this case, if a beam fault is detected for S1, the terminal device 130 may identify a third RS from a fifth set of RSs. In some embodiments, CORESET A and CORESET B may be associated with a single BFD RS (e.g., S1, S2, or S3). The BFD RS set may include a first RS and a second RS. In this case, if a first beam fault is detected for the first RS, the terminal device 130 may identify a third RS from a fifth set of RSs. In some embodiments, the terminal device 130 may monitor a first PDCCH candidate by using a first set of antenna port QCL parameters associated with a third RS. In some embodiments, the terminal device 130 may monitor a second PDCCH candidate by utilizing a second TCI state for a second CORESET. In some embodiments, the terminal device 130 does not need to monitor either the first or second PDCCH candidate. In some embodiments, if a beam fault is detected for S1, the terminal device 130 may decide not to monitor either the first or second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the first and second PDCCH candidates.

[0052] In some embodiments, CORESET A and CORESET B may each be associated with two different BFD RS sets, for example, a first set of RSs (i.e., S1) and a second set of RSs (i.e., S2). In this case, if a beam fault is detected for S2, the terminal device 130 may identify a fourth RS from a sixth set of RSs. In some embodiments, CORESET A and CORESET B may be associated with a single BFD RS (e.g., S1, S2, or S3). The BFD RS set may include a first RS and a second RS. In this case, if a first beam fault is detected for the second RS, the terminal device 130 may identify a fourth RS from a sixth set of RSs. In some embodiments, the terminal device 130 may monitor a second PDCCH candidate by using a second set of antenna port QCL parameters associated with the fourth RS. In some embodiments, the terminal device 130 may monitor a first PDCCH candidate by utilizing a first TCI state for the first CORESET. In some embodiments, the terminal device 130 does not need to monitor either the first or second PDCCH candidate. In some embodiments, if a beam fault is detected for S2, the terminal device 130 may decide not to monitor either the first or second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the first and second PDCCH candidates.

[0053] In some embodiments, if a third RS is identified and a fourth RS is not identified, the terminal device 130 may monitor the first PDCCH candidate by using a first set of antenna port QCL parameters associated with the third RS, without monitoring the second PDCCH candidate. In some embodiments, if a third RS is identified and a fourth RS is not identified, the terminal device 130 may monitor the first PDCCH candidate by using a first set of antenna port QCL parameters associated with the third RS. In some embodiments, if a third RS is identified and a fourth RS is not identified, the terminal device 130 may decide not to monitor the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the second PDCCH candidate. In some embodiments, if a third RS is not identified and a fourth RS is identified, the terminal device 130 may monitor a second PDCCH candidate by using a second set of antenna port QCL parameters associated with the fourth RS, without monitoring a first PDCCH candidate. In some embodiments, if a third RS is not identified and a fourth RS is identified, the terminal device 130 may monitor a second PDCCH candidate by using a second set of antenna port QCL parameters associated with the fourth RS. In some embodiments, if a third RS is not identified and a fourth RS is identified, the terminal device 130 may decide not to monitor a first PDCCH candidate, or the terminal device 130 may discard, discard, or ignore a first PDCCH candidate. In some embodiments, if at least one of the third RS and the fourth RS is not identified, the terminal device 130 may not monitor either a first PDCCH candidate or a second PDCCH candidate. In some embodiments, if at least one of the third RS and the fourth RS is not identified, the terminal device 130 may decide not to monitor either the first PDCCH candidate or the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the first PDCCH candidate and the second PDCCH candidate.

[0054] In some embodiments, CORESET A and CORESET B may be associated with a single BFD RS (e.g., S1, S2, or S3). The BFD RS set may include a first RS and a second RS. In some embodiments, if a beam fault is detected for at least one of the first RS and the second RS or for the BFD RS set, the terminal device 130 may identify at least one of the fifth RS and the sixth RS from a seventh set of RSs. In some embodiments, depending on the identification of the fifth RS, the terminal device 130 may monitor a first PDCCH candidate using a third set of antenna port QCL parameters associated with the fifth RS. In some embodiments, depending on the identification of the sixth RS, the terminal device 130 may monitor a second PDCCH candidate using a fourth set of antenna port pseudo-collocation (QCL) parameters associated with the sixth RS. Alternatively, in some embodiments, if a beam fault is detected for at least one of the first RS and the second RS or for the BFD RS set, the terminal device 130 may not monitor either the first PDCCH candidate or the second PDCCH candidate. In some embodiments, if a beam fault is detected for at least one of the first RS and the second RS or for the BFD RS set, the terminal device 130 may decide or determine not to monitor either the first PDCCH candidate or the second PDCCH candidate, or the terminal device 130 may discard, discard or ignore the first PDCCH candidate and the second PDCCH candidate.

[0055] In some embodiments, if a fifth RS is identified and a sixth RS is not identified, the terminal device 130 may monitor the first PDCCH candidate by using a third set of antenna port QCL parameters associated with the fifth RS, without monitoring the second PDCCH candidate. In some embodiments, if a fifth RS is identified and a sixth RS is not identified, the terminal device 130 may monitor the first PDCCH candidate by using a third set of antenna port QCL parameters associated with the fifth RS. In some embodiments, if a fifth RS is identified and a sixth RS is not identified, the terminal device 130 may decide not to monitor the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the second PDCCH candidate. In some embodiments, if a fifth RS is not identified and a sixth RS is identified, the terminal device 130 may monitor a second PDCCH candidate by using a fourth set of antenna port QCL parameters associated with the sixth RS, without monitoring a first PDCCH candidate. In some embodiments, if a fifth RS is not identified and a sixth RS is identified, the terminal device 130 may monitor a second PDCCH candidate by using a fourth set of antenna port QCL parameters associated with the sixth RS. In some embodiments, if a fifth RS is not identified and a sixth RS is identified, the terminal device 130 may decide not to monitor a first PDCCH candidate, or the terminal device 130 may discard, discard, or ignore a first PDCCH candidate. In some embodiments, if at least one of the fifth RS and the sixth RS is not identified, the terminal device 130 may not monitor either a first PDCCH candidate or a second PDCCH candidate. In some embodiments, if at least one of the fifth RS and the sixth RS is not identified, the terminal device 130 may decide not to monitor either the first PDCCH candidate or the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the first PDCCH candidate and the second PDCCH candidate.

[0056] In some embodiments, CORESET A and CORESET B may each be associated with two different BFD RS sets, for example, a first set of RSs (i.e., S1) and a second set of RSs (i.e., S2). In this case, if a beam fault is detected for S1, the terminal device 130 may identify a third RS from a fifth set of RSs. In some embodiments, CORESET A and CORESET B may be associated with a single BFD RS (e.g., S1, S2, or S3). The BFD RS set may include a first RS and a second RS. In this case, if a first beam fault is detected for the first RS, the terminal device 130 may identify a third RS from a fifth set of RSs. In some embodiments, depending on the identification of a third RS, the terminal device 130 may use a first set of antenna port QCL parameters associated with the third RS to decode the DCI associated with the first PDCCH candidate. In some embodiments, the terminal device 130 may decode the DCI associated with the second PDCCH candidate using the second TCI state for the second CORESET. In some embodiments, the terminal device 130 may decode the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, the terminal device 130 does not have to decode the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, the terminal device 130 may decide or determine not to decode / detect the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, the terminal device 130 does not have to decode the DCI associated with either the first PDCCH candidate or the second PDCCH candidate.In some embodiments, the terminal device 130 may decide not to decode / detect a DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, or a combination of the first PDCCH candidate and the second PDCCH candidate; or the terminal device 130 may discard, discard, or ignore a DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, or a combination of the first PDCCH candidate and the second PDCCH candidate.

[0057] In some embodiments, CORESET A and CORESET B may each be associated with two different BFD RS sets, for example, a first set of RSs (i.e., S1) and a second set of RSs (i.e., S2). In this case, if a beam fault is detected for S2, the terminal device 130 may identify a fourth RS from a sixth set of RSs. In some embodiments, CORESET A and CORESET B may be associated with a single BFD RS (e.g., S1, S2, or S3). The BFD RS set may include a first RS and a second RS. In this case, if a first beam fault is detected for the second RS, the terminal device 130 may identify a fourth RS from a sixth set of RSs. In some embodiments, depending on the identification of a third RS, the terminal device 130 may use a second set of antenna port QCL parameters associated with the fourth RS to decode the DCI associated with the second PDCCH candidate. In some embodiments, the terminal device 130 may decode the DCI associated with the first PDCCH candidate using the first TCI state for the first CORESET. In some embodiments, the terminal device 130 may decode the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, the terminal device 130 does not have to decode the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, the terminal device 130 may decide or determine not to decode / detect the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, the terminal device 130 does not have to decode the DCI associated with either the first PDCCH candidate or the second PDCCH candidate.In some embodiments, the terminal device 130 may decide not to decode / detect a DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, or a combination of the first PDCCH candidate and the second PDCCH candidate; or the terminal device 130 may discard, discard, or ignore a DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, or a combination of the first PDCCH candidate and the second PDCCH candidate.

[0058] In some embodiments, if a third RS is identified and a fourth RS is not identified, the terminal device 130 may decode the DCI associated with the first PDCCH candidate by using a first set of antenna port QCL parameters associated with the third RS, without decoding the DCI associated with the second PDCCH candidate and without decoding the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, if a third RS is identified and a fourth RS is not identified, the terminal device 130 may decode the DCI associated with the first PDCCH candidate by using a first set of antenna port QCL parameters associated with the third RS. In some embodiments, if a third RS is identified and a fourth RS is not identified, the terminal device 130 may decide not to decode / detect the DCI associated with the second PDCCH candidate and any combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the second PDCCH candidate and any combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, if a third RS is not identified and a fourth RS is identified, the terminal device 130 may decode the DCI associated with the second PDCCH candidate by using a second set of antenna port QCL parameters associated with the third RS, without decoding the DCI associated with the first PDCCH candidate and without decoding the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, if a third RS is not identified and a fourth RS is identified, the terminal device 130 may use a second set of antenna port QCL parameters associated with the third RS to decode the DCI associated with the second PDCCH candidate.In some embodiments, if a third RS is not identified and a fourth RS is identified, the terminal device 130 may decide not to decode / detect the DCI associated with the first PDCCH candidate and any one of the combinations of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the first PDCCH candidate and any one of the combinations of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, if at least one of the third RS and the fourth RS is not identified, the terminal device 130 may not decode the DCI associated with the first PDCCH candidate and any one of the combinations of the second PDCCH candidate and the first PDCCH candidate. In some embodiments, if at least one of the third RS and the fourth RS is not identified, the terminal device 130 may decide not to decode / detect the DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, or a combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, or a combination of the first PDCCH candidate and the second PDCCH candidate.

[0059] In some embodiments, CORESET A and CORESET B may be associated with a single BFD RS (e.g., S1, S2, or S3). The BFD RS set may include a first RS and a second RS. In some embodiments, if a beam fault is detected for at least one of the first RS and the second RS or for the BFD RS set, the terminal device 130 may identify at least one of the fifth RS and the sixth RS from a seventh set of RSs. In some embodiments, depending on the identification of the fifth RS, the terminal device 130 may decode the DCI associated with the first PDCCH candidate using a third set of antenna port QCL parameters associated with the fifth RS. In some embodiments, depending on the identification of the sixth RS, the terminal device 130 may decode the DCI associated with the second PDCCH candidate using a fourth set of antenna port QCL parameters associated with the sixth RS. In some embodiments, the terminal device 130 does not need to decode the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, the terminal device 130 may decide or determine not to decode / detect the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, the terminal device 130 does not need to decode the DCI associated with either the first PDCCH candidate or the second PDCCH candidate. In some embodiments, the terminal device 130 may decide not to decode / detect a DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, or a combination of the first PDCCH candidate and the second PDCCH candidate; or the terminal device 130 may discard, discard, or ignore a DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, or a combination of the first PDCCH candidate and the second PDCCH candidate.

[0060] In some embodiments, if a fifth RS is identified and a sixth RS is not identified, the terminal device 130 may decode the DCI associated with the first PDCCH candidate by using a third set of antenna port QCL parameters associated with the fifth RS, without decoding at least one of the DCI associated with the second PDCCH candidate and the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, if a fifth RS is identified and a sixth RS is not identified, the terminal device 130 may decode the DCI associated with the first PDCCH candidate by using a third set of antenna port QCL parameters associated with the fifth RS. In some embodiments, if a fifth RS is identified and a sixth RS is not identified, the terminal device 130 may decide not to decode / detect the DCI associated with the second PDCCH candidate and any one of the combinations of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the second PDCCH candidate and any one of the combinations of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, if a fifth RS is not identified and a sixth RS is identified, the terminal device 130 may decode the DCI associated with the second PDCCH candidate by using a fourth set of antenna port QCL parameters associated with the sixth RS, without decoding at least one of the DCI associated with the first PDCCH candidate and the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, if a fifth RS is not identified and a sixth RS is identified, the terminal device 130 may use a fourth set of antenna port QCL parameters associated with the sixth RS to decode the DCI associated with the second PDCCH candidate.In some embodiments, if the fifth RS is not identified and the sixth RS is identified, the terminal device 130 may decide not to decode / detect the DCI associated with the first PDCCH candidate and any one of the combinations of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the first PDCCH candidate and any one of the combinations of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, if at least one of the fifth RS and the sixth RS is not identified, the terminal device 130 may not decode at least one of the DCI associated with the first PDCCH candidate, the DCI associated with the second PDCCH candidate, and the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, if at least one of the fifth RS and the sixth RS is not identified, the terminal device 130 may decide not to decode / detect the DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, or a combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, or a combination of the first PDCCH candidate and the second PDCCH candidate.

[0061] In some embodiments, the at least one PDCCH candidate may be monitored from or after a certain point in time. For example, the point in time may be a slot or a symbol. The terminal device 130 may decode the DCI associated with the first PDCCH candidate from or after the point in time. Alternatively, or additionally, the terminal device 130 may decode the DCI associated with the second PDCCH candidate from or after the point in time. Alternatively, or additionally, the terminal device 130 may decode the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate from or after the point in time. In some embodiments, the point in time may be 28 symbols starting from the last symbol of the first PDCCH reception in the search set provided by recoverySeaerchSpaceId, where the terminal device detects a DCI having a cyclic redundancy check (CRC) scrambled by a Cell Radio Network Temporary Identifier (C-RNTI) or Modulation and Encoding Scheme Cell Radio Network Temporary Identifier (MCS-C-RNTI). In some embodiments, the time point may be 28 symbols starting from the last symbol of a PDCCH reception with a DCI having a toggled New Data Indicator (NDI) field value, which has scheduled PUSCH transmissions with the same hybrid automatic repeat request (HARQ) process number as the first PUSCH transmission.

[0062] In some embodiments, for a PDCCH iteration, the detection / decoding of a combination of the first and second PDCCH candidates may be counted in the slot / span corresponding to the first or second PDCCH candidate. For example, the terminal device 130 may decode only the combination of the first and second PDCCH candidates and not the individual first and second PDCCH candidates. In some embodiments, for a PDCCH iteration, the blind detection of each individual PDCCH candidate may be counted in each slot / span corresponding to each individual PDCCH candidate. For example, the terminal device 130 may decode only the individual PDCCH candidates. In some embodiments, for a PDCCH iteration, the blind detection of the first PDCCH candidate may be counted in the slot / span corresponding to the first PDCCH candidate, and the blind detection of a combination of the first and second PDCCH candidates may be counted in the slot / span corresponding to the first or second PDCCH candidate. For example, terminal device 130 may decode a first PDCCH candidate and a combination of the first PDCCH candidate and a second PDCCH candidate. In some embodiments, for a PDCCH iteration, the blind detection of each individual PDCCH candidate may be counted in each slot / span corresponding to each individual PDCCH candidate, and the blind detection of a combination of the first and second PDCCH candidates may be counted in the slot / span corresponding to the first or second PDCCH candidate. For example, terminal device 130 may decode each PDCCH candidate individually and also decode a combination of the first and second PDCCH candidates.

[0063] As described above, in the SFN scheme, one CORESET or one or more SS sets within one CORESET may be configured to have two TCI states (corresponding to different beams) in order to improve the reliability and robustness of the PDCCH. Figure 3 is a flowchart of an exemplary method 300 of the SFN scheme according to some embodiments of the present disclosure. Method 300 can be implemented in a terminal device 130 as shown in Figure 1.

[0064] As shown in Figure 3, in block 310, terminal device 130 receives at least one setting relating to CORESET (also referred to as "CORESET C") from network device 110. This at least one setting may indicate at least one of the following: that the CORESET is associated with multiple sets of RS of BFD; that the CORESET is associated with a first TCI state and a second TCI state; and that PDCCH candidates in the search space associated with the CORESET are associated with a first TCI state and a second TCI state.

[0065] In some embodiments, the at least one setting may indicate that CORESET C is associated with two different sets of RS in BFD. For example, CORESET C may be associated with a first set of RS in BFD (also referred to as "BFD RS set S1") and a second set of RS in BFD (also referred to as "BFD RS set S2"). In some embodiments, the number of RSs in BFD RS set S1 may be any of {1, 2, 3, 4}. The number of RSs in BFD RS set S2 may be any of {1, 2, 3, 4}. In some embodiments, CORESET C may be set to have an ID (e.g., ID1), where ID1 may be selected from a value set W, where W = {N / A, 0, 1}. In some embodiments, CORESET C may be set to have an ID (e.g., ID3), where ID3 may be a value different from any of the values ​​in value set W. For example, ID3 may be 2 or 3.

[0066] In some embodiments, if CORESET C is configured to have two active TCI states, CORESET C may be associated with both or all configured BFD RS sets (e.g., S1 and S2).

[0067] In some embodiments, the at least one setting may indicate that CORESET C is associated with one set of BFD RSs. In some embodiments, CORESET C may be associated with S1 or S2. For example, in this case, CORESET C may be set to have an ID value (e.g., ID1), where ID1 may be selected from a value set W, where W = {N / A, 0, 1}. In some embodiments, CORESET C may be associated with an independent BFD RS set, such as S4, which is different from any of S1, S2, and S3. For example, the number of RSs in BFD RS set S1 may be any of {1, 2, 3, 4}. For example, BFD RS set S3 may contain up to two RSs, each RS may be QCLed or associated with the TCI state of CORESET C. For example, for each set / pair of CORESETs having linked search space sets, there may be an associated independent BFD RS set. For example, in this case, CORESET C may be set to have an ID value (e.g., ID1), where ID1 may be selected from a value set W, where W = {N / A, 0, 1}. In another example, in this case, CORESET C may be set to have an ID value (e.g., ID3), where ID3 may be a value different from any value in the value set W. For example, ID3 may be 2 or 3.

[0068] In block 320, the terminal device 130 monitors PDCCH candidates based on the detection of beam faults by evaluating the radio link quality for at least one of several sets of RS.

[0069] In some embodiments, the wireless link quality of all corresponding resource settings within one BFD RS set (e.g., S1, S2, or S4), or the wireless link quality of at least one corresponding resource setting within a BFD RS set (e.g., S4) used by the terminal device 130 to evaluate the wireless link quality, is set to a threshold Q. out,LRIf the result is worse than that, it means that the BFD RS set is failing or one of the TRP / links is failing.

[0070] In some embodiments, if no beam fault is detected on any of the multiple sets of RS, the terminal device 130 may monitor PDCCH candidates having a first TCI state and a second TCI state. In some embodiments, if a beam fault is detected on at least one of the multiple sets of RS, the terminal device 130 does not need to monitor PDCCH candidates. In some embodiments, if a beam fault is detected on at least one of the multiple sets of RS, the terminal device 130 may decide not to monitor PDCCH candidates, or the terminal device 130 may discard, discard, or ignore PDCCH candidates. In some embodiments, if a beam fault is detected on at least one of the multiple sets of RS, the terminal device 130 may monitor PDCCH candidates having only one of the first TCI state and a second TCI state.

[0071] In some embodiments, the multiple sets of RS include a first set of RS (i.e., S1) and a second set of RS (i.e., S2). In some embodiments, if a beam fault is detected on the second set of RS, the terminal device 130 may monitor PDCCH candidates using the first TCI state. Alternatively, or additionally, if a beam fault is detected on the first set of RS, the terminal device 130 may monitor PDCCH candidates using the second TCI state. Alternatively, if a beam fault is detected on at least one of the first RS and the second RS, the terminal device 130 does not need to monitor PDCCH candidates. In some embodiments, if a beam fault is detected on at least one of the first RS and the second RS, the terminal device 130 may decide not to monitor PDCCH candidates, or the terminal device 130 may discard, discard, or ignore PDCCH candidates.

[0072] In some embodiments, the multiple sets of RS may include a third set of RS (i.e., S1, S2, or S4) which includes a first RS and a second RS. In some embodiments, if a beam fault is detected for the second RS, the terminal device 130 may monitor PDCCH candidates using the first TCI state. In some embodiments, if a beam fault is detected for the first RS, the terminal device 130 may monitor PDCCH candidates using the second TCI state. In some embodiments, if a beam fault is detected for at least one of the first RS and the second RS, the terminal device 130 does not need to monitor PDCCH candidates. In some embodiments, if a beam fault is detected for at least one of the first RS and the second RS, the terminal device 130 may decide not to monitor PDCCH candidates, or the terminal device 130 may discard, discard, or ignore PDCCH candidates.

[0073] In some embodiments, the terminal device 130 may decode the DCI associated with the PDCCH candidate. In some embodiments, if a beam fault is detected for at least one of the multiple sets of RS, the terminal device 130 may not decode the DCI associated with the PDCCH candidate. In some embodiments, if a beam fault is detected for at least one of the multiple sets of RS, the terminal device 130 may decide not to decode the DCI associated with the PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the PDCCH candidate.

[0074] In some embodiments, the multiple sets of RS include a first set of RS (i.e., S1) and a second set of RS (i.e., S2). In some embodiments, if no beam fault is detected in either the first set of RS or the second set of RS, the terminal device 130 may decode the DCI associated with the PDCCH candidate having a first TCI state and a second TCI state. In some embodiments, if a beam fault is detected in at least one of the first set of RS or the second set of RS, the terminal device 130 may decode the DCI associated with the PDCCH candidate having one of the first TCI state and a second TCI state. In some embodiments, if a beam fault is detected in at least one of the first set of RS or the second set of RS, the terminal device 130 does not need to decode the DCI associated with the PDCCH candidate having either the first TCI state or a second TCI state. In some embodiments, if a beam fault is detected in at least one of the first set of RSs and the second set of RSs, the terminal device 130 may not decode the DCI associated with the PDCCH candidate. In some embodiments, if a beam fault is detected in at least one of the first set of RSs and the second set of RSs, the terminal device 130 may decide not to decode the DCI associated with the PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the PDCCH candidate.

[0075] In some embodiments, if a beam fault is detected for a second set of RSs, the terminal device 130 may use the first TCI state to decode the DCI associated with the PDCCH candidate. In some embodiments, if a beam fault is detected for a first set of RSs, the terminal device 130 may use the second TCI state to decode the DCI associated with the PDCCH candidate. In some embodiments, if a beam fault is detected for at least one of the first set of RSs and the second set of RSs, the terminal device 130 does not have to decode the DCI associated with the PDCCH candidate having either the first TCI state or the second TCI state. In some embodiments, if a beam fault is detected for at least one of the first set of RSs and the second set of RSs, the terminal device 130 may decide not to decode the DCI associated with the PDCCH candidate having either the first TCI state or the second TCI state, or the terminal device 130 may discard, discard, or ignore the DCI associated with the PDCCH candidate. In some embodiments, if a beam fault is detected in at least one of the first set of RSs and the second set of RSs, the terminal device 130 does not need to decode the DCI associated with the PDCCH candidate.

[0076] In some embodiments, the multiple sets of RS include a third set of RS (i.e., S1, S2, or S4) which includes a first RS and a second RS. In some embodiments, if a beam fault is detected for the second RS, the terminal device 130 may use the first TCI state to decode the DCI associated with the PDCCH candidate. In some embodiments, if a beam fault is detected for the first RS, the terminal device 130 may use the second TCI state to decode the DCI associated with the PDCCH candidate. In some embodiments, if a beam fault is detected for at least one of the first RS and the second RS, the terminal device 130 does not need to decode the DCI associated with the PDCCH candidate having either the first TCI state or the second TCI state. In some embodiments, if a beam fault is detected in at least one of the first RS and the second RS, the terminal device 130 may decide not to decode the DCI associated with the PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the PDCCH candidate.

[0077] In some embodiments, the terminal device 130 may receive both a first set of RS (i.e., S1) and a second set of RS (i.e., S2) via at least one of the radio resource control (RRC) signaling, the media access control (MAC) control element (CE), and the DCI. Alternatively, the terminal device 130 may not receive either the first set of RS or the second set of RS via at least one of the RRC signaling, the MAC CE, and the DCI. Alternatively, the terminal device 130 may receive only the first set of RS via at least one of the RRC signaling, the MAC CE, and the DCI, or the terminal device 130 may not receive the first set of RS via at least one of the RRC signaling, the MAC CE, and the DCI. Alternatively, terminal device 130 may receive only the second set of RS signals via at least one of RRC signaling, MAC CE, and DCI, or terminal device 130 may not receive the second set of RS signals via at least one of RRC signaling, MAC CE, and DCI. In some embodiments, terminal device 130 may receive both the first RS and the second RS signals via at least one of RRC signaling, MAC CE, and DCI. Alternatively, terminal device 130 may not receive either the first RS or the second RS signals via at least one of RRC signaling, MAC CE, and DCI. Alternatively, terminal device 130 may receive only the first RS via at least one of RRC signaling, MAC CE, and DCI, or terminal device 130 may not receive the first RS via at least one of RRC signaling, MAC CE, and DCI. Alternatively, terminal device 130 may receive only the second RS via at least one of RRC signaling, MAC CE, and DCI, or terminal device 130 may not receive the second RS via at least one of RRC signaling, MAC CE, and DCI.

[0078] In some embodiments, if a first set of RSs or a first RS is not received by the terminal device 130, the terminal device 130 may determine a first set of RSs or a first RS based on a fourth set of RSs indicated in a first TCI state for CORESET. In some embodiments, if a second set of RSs or a second RS is not received by the terminal device 130, the terminal device 130 may determine a second set of RSs or a second RS based on a fifth set of RSs indicated in a second TCI state for CORESET. In some embodiments, the terminal device 130 may determine a third set of RSs based on a combination of a fourth set of RSs indicated in a first TCI state for CORESET C and a fifth set of RSs indicated in a second TCI state for CORESET C.

[0079] In some embodiments, for example, with respect to an SFN scheme, if a beam failure occurs, the terminal device 130 may identify two new beams. In some embodiments, if CORESET A and CORESET B are associated with the same BFD RS set, the terminal device 130 may, in the upper layer, identify at least two periodic CSI-RS setting indices and / or at least two SS / physical broadcast channel (PBCH) block indices or at least one periodic CSI-RS setting index and one SS / physical broadcast channel (PBCH) block index and Q in,LR Indicates whether there are corresponding L1-RSRP measurements that are above the threshold, and if so, two periodic CSI-RS setting indices and / or two SS / PBCH block indices and / or one periodic CSI-RS setting index and one SS / PBCH block index from set q1 and Q in,LRA corresponding L1-RSRP measurement value that is above the threshold may be provided. For candidate RS IDs, both the first and second fields are set to the index of an SSB in the candidate beamlist where the SS-RSRP is higher than the rsrp-ThresholdBFR, or to the index of a CSI-RS in the candidate beamlist where the CSI-RSRP is higher than the rsrp-ThresholdBFR. The index of the SSB or CSI-RS is the index of the entry in the candidate beamlist corresponding to that SSB or CSI-RS. Index 0 corresponds to the first entry in the candidate beamlist, index 1 corresponds to the second entry in the list, and so on. The length of this field is 12 bits.

[0080] In some embodiments, the multiple sets of RS include a first set of RS (i.e., S1) and a second set of RS (i.e., S2). In this case, if a beam fault is detected for S1, the terminal device 130 may identify a third RS from a sixth set of RS. In some embodiments, the multiple sets of RS include a third set of RS (i.e., S1, S2, or S4). The third set of RS may include a first RS and a second RS. In this case, if a first beam fault is detected for the first RS, the terminal device 130 may identify a third RS from a sixth set of RS. In some embodiments, the terminal device 130 may monitor PDCCH candidates or decode DCIs associated with PDCCH candidates by using a first set of antenna port pseudo-collocation (QCL) parameters associated with a third RS. In some embodiments, the terminal device 130 may monitor PDCCH candidates or decode DCIs associated with PDCCH candidates by utilizing a second TCI state of CORESET C. In some embodiments, the terminal device 130 may monitor PDCCH candidates or decode DCIs associated with PDCCH candidates by using a first set of antenna port pseudo-collocation (QCL) parameters associated with a third RS and a second TCI state of CORESET C. In some embodiments, the terminal device 130 may not monitor PDCCH candidates. In some embodiments, the terminal device 130 may not decode DCIs associated with PDCCH candidates. In some embodiments, the terminal device 130 may decide not to monitor PDCCH candidates, or the terminal device 130 may discard, discard, or ignore PDCCH candidates. In some embodiments, the terminal device 130 may decide not to decode DCIs associated with PDCCH candidates, or the terminal device 130 may discard, discard, or ignore DCIs associated with PDCCH candidates.

[0081] In some embodiments, the multiple sets of RS include a first set of RS (i.e., S1) and a second set of RS (i.e., S2). In this case, if a beam fault is detected for S2, the terminal device 130 may identify a fourth RS from a sixth set of RS or from a seventh set of RS. In some embodiments, the multiple sets of RS include a third set of RS (i.e., S1, S2, or S4). The third set of RS may include a first RS and a second RS. In this case, if a first beam fault is detected for the second RS, the terminal device 130 may identify a fourth RS from a sixth set of RS or from a seventh set of RS. In some embodiments, the terminal device 130 may use a first TCI state for CORESET to monitor PDCCH candidates or decode DCIs associated with PDCCH candidates. In some embodiments, the terminal device 130 may monitor PDCCH candidates or decode DCI associated with PDCCH candidates by using a second set of antenna port QCL parameters associated with a fourth RS. In some embodiments, the terminal device 130 may monitor PDCCH candidates or decode DCI associated with PDCCH candidates by using a second set of antenna port QCL parameters associated with a first TCI state for the fourth RS and CORESET C. In some embodiments, the terminal device 130 does not need to monitor PDCCH candidates. In some embodiments, the terminal device 130 does not need to decode DCI associated with PDCCH candidates. In some embodiments, the terminal device 130 may decide or determine not to monitor PDCCH candidates, or the terminal device 130 may discard, discard, or ignore PDCCH candidates. In some embodiments, the terminal device 130 may decide not to decode the DCI associated with the PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the PDCCH candidate.

[0082] In some embodiments, if a third RS is identified and a fourth RS is not identified, the terminal device 130 may monitor PDCCH candidates or decode DCI associated with the first PDCCH candidate by using a first set of antenna port pseudo-collocation (QCL) parameters associated with the third RS. In some embodiments, if a third RS is not identified and a fourth RS is identified, the terminal device 130 may monitor PDCCH candidates or decode DCI associated with PDCCH candidates by using a second set of antenna port pseudo-collocation (QCL) parameters associated with the fourth RS. In some embodiments, if at least one of the third RS and the fourth RS is not identified, the terminal device 130 does not need to monitor PDCCH candidates or decode DCI associated with PDCCH candidates. In some embodiments, if at least one of the third RS and the fourth RS is not identified, the terminal device 130 may decide not to monitor the PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the PDCCH candidate. In some embodiments, if at least one of the third RS and the fourth RS is not identified, the terminal device 130 may decide not to decode the DCI associated with the PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the PDCCH candidate.

[0083] In some embodiments, the multiple sets of RS include a third set of RS (i.e., S1, S2, or S4). The third set of RS includes a first RS and a second RS. In this case, if a beam obstruction is detected for at least one of the first RS and the second RS, or for the third set of RS, the terminal device 130 may identify at least one of the fifth RS and the sixth RS from the eighth set of RS. In some embodiments, depending on the identification of the fifth RS, the terminal device 130 may monitor PDCCH candidates or decode DCI associated with PDCCH candidates using a third set of antenna port QCL parameters associated with the fifth RS. In some embodiments, depending on the identification of the sixth RS, the terminal device 130 may monitor PDCCH candidates or decode DCI associated with PDCCH candidates using a fourth set of antenna port QCL parameters associated with the sixth RS. Alternatively, in some embodiments, if a beam fault is detected for at least one of the first RS and the second RS, or for a third set of RSs, the terminal device 130 may not monitor the PDCCH candidate or decode the DCI associated with the PDCCH candidate. In some embodiments, if a beam fault is detected for at least one of the first RS and the second RS, or for a third RS, the terminal device 130 may decide not to monitor the PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the PDCCH candidate. In some embodiments, if a beam fault is detected for at least one of the first RS and the second RS, or for a third RS, the terminal device 130 may decide not to decode the DCI associated with the PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the PDCCH candidate.

[0084] In some embodiments, if a fifth RS is identified and a sixth RS is not identified, the terminal device 130 may monitor the PDCCH candidate or decode the DCI associated with the PDCCH candidate by using a third set of antenna port pseudo-collocation (QCL) parameters associated with the fifth RS. In some embodiments, if a fifth RS is not identified and a sixth RS is identified, the terminal device 130 may monitor the PDCCH candidate or decode the DCI associated with the PDCCH candidate by using a fourth set of antenna port QCL parameters associated with the sixth RS. In some embodiments, if at least one of the fifth RS and the sixth RS is not identified, the terminal device 130 does not need to monitor the PDCCH candidate or decode the DCI associated with the PDCCH candidate. In some embodiments, if at least one of the fifth RS and the sixth RS is not identified, the terminal device 130 may decide not to monitor the PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the PDCCH candidate. In some embodiments, if at least one of the fifth RS and the sixth RS is not identified, the terminal device 130 may decide not to decode the DCI associated with the PDCCH candidate, or the terminal device 130 may discard, discard, or ignore the DCI associated with the PDCCH candidate.

[0085] In some embodiments, the PDCCH candidates may be monitored from or after a certain point in time. For example, the point in time may be a slot or a symbol. The terminal device 130 may decode the DCI associated with the PDCCH candidate from or after the point in time. In some embodiments, the point in time may be 28 symbols starting from the last symbol of the first PDCCH reception in the search set provided by recoverySeaerchSpaceId, in which the terminal device detects a DCI having a cyclic redundancy check (CRC) scrambled by a Cell Radio Network Temporary Identifier (C-RNTI) or Modulation and Encoding Scheme Cell Radio Network Temporary Identifier (MCS-C-RNTI). In some embodiments, the point in time may be 28 symbols starting from the last symbol of the PDCCH reception having a DCI with a toggled New Data Indicator (NDI) field value, which schedules a PUSCH transmission having the same hybrid automatic repeat request (HARQ) process number as the transmission of the first PUSCH.

[0086] In some embodiments, if a CORESET is configured to have two active TCI states, the spatial setting for a PUCCH transmission from terminal device 130 may be the same as the spatial setting corresponding to the first TCI state / QCL parameter for PDCCH reception by terminal device 130 in the CORESET having the lowest ID. In some embodiments, if applicable, terminal device 130 may transmit a PUCCH by referring to an RS having "QCL-TypeD" corresponding to the first TCI state / QCL assumption for the CORESET having the lowest ID, based on spatial relationships. In some embodiments, terminal device 130 may assume that the DM-RS port of the serving cell's PDCCH is in pseudo-collocation with RS with respect to the first TCI state / QCL parameter used for PDCCH pseudo-collocation indication of a CORESET associated with a monitored search space having the lowest controlResourceSetId in the last slot monitored by terminal device 130, where one or more CORESETs in the serving cell's active BWP are associated with the monitored search space having the lowest controlResourceSetId. Alternatively, terminal device 130 may assume that the DM-RS port of the serving cell's PDSCH is in pseudo-collocation with RS with respect to two TCI state / QCL parameters used for PDCCH pseudo-collocation instructions of a CORESET associated with a monitored search space having the lowest controlResourceSetId in the last slot monitored by terminal device 130 of the serving cell's active BWP.

[0087] Figure 4 is a flowchart of exemplary Method 400, both SFN scheme and non-SFN scheme, according to several embodiments of the present disclosure. Method 400 can be implemented in a terminal device 130 as shown in Figure 1.

[0088] As shown in Figure 4, in block 410, the terminal device 130 receives at least one setting for at least one control resource set (CORESET), where the at least one setting indicates that the at least one CORESET is associated with at least one set of reference signals (RS) for beam fault detection (BFD). In block 420, depending on whether a beam fault is detected by evaluating the radio link quality on at least one RS included in the at least one set of RS, the terminal device 130 does not monitor any PDCCH candidates within the at least one CORESET.

[0089] In some embodiments, the terminal device may be configured to have a higher-layer parameter precoderGranularity equal to allContiguousRBs, and the terminal device may be configured to have a CORESET configured or activated to have two TCI states. In some embodiments, the demodulation reference signals (DMRS) for the PDCCH are a set of resource element groups (REGs) in a set of contiguous resource blocks in the CORESET, which are associated with the same TCI state as the PDCCH (or the PDCCH candidate being monitored). In some embodiments, the terminal device may assume that the same precoding is used across the set of REGs in the set of contiguous resource blocks, where the set of REGs are associated with the same TCI state as the PDCCH (or the PDCCH candidate being monitored).

[0090] In some embodiments, sets of REGs are contiguous within sets of contiguous resource blocks. For example, if one PDCCH (or PDCCH candidate) is monitored / detected within a first set of REGs within a contiguous set of RBs, then the DMRS is assumed to be within a second set of subsets of REGs, where the TCI states of the first set of REGs and the second set of REGs are the same, and each subset of REGs in the second set contains a set / subset of the first set of REGs.

[0091] In some embodiments, the terminal device performs a sequence according to the following formula.

number

number

number

[0092] In some embodiments, for both interleaved mapping and non-interleaved mapping, the terminal device may be assumed to be as follows: - If the upper-level parameter precoderGranularity is equal to sameAsREG-bundle, the same precoding will be used within the REG bundle. - If the upper layer parameter precoderGranularity is equal to allContiguousRBs, the same precoding is used across groups of contiguous resource elements associated with the same TCI state as the PDCCH in the set of contiguous resource blocks within the CORESET, and there are no resource elements within the CORESET that overlap with the SSB or LTE cell-specific reference signals indicated by the upper layer parameter lte-CRS-ToMatchAround or additionalLTE-CRS-ToMatchAroundList.

[0093] In some embodiments, a set of REGs is all REGs associated with the same TCI state within a set of consecutive resource blocks. For example, if a PDCCH (candidate) is monitored / detected within a first set of REGs within a set of consecutive RBs, then the DMRS is assumed within all REGs associated with the same TCI state of the PDCCH within a set of consecutive resource blocks within a second set of REGs.

[0094] In some embodiments, the terminal device performs a sequence according to the following formula.

number

number

number

[0095] In some embodiments, for both interleaved mapping and non-interleaved mapping, the terminal device may be assumed to be as follows: - If the upper-level parameter precoderGranularity is equal to sameAsREG-bundle, the same precoding will be used within the REG bundle. - If the upper layer parameter precoderGranularity is equal to allContiguousRBs, the same precoding is used across all resource element groups associated with the same TCI state as the PDCCH in the set of contiguous resource blocks within the CORESET, and there are no resource elements within the CORESET that overlap with the SSB or LTE cell-specific reference signals indicated by the upper layer parameter lte-CRS-ToMatchAround or additionalLTE-CRS-ToMatchAroundList.

[0096] In some embodiments, the terminal device comprises a circuit which receives at least one setting relating to a first control resource set (CORESET) and a second CORESET, wherein the at least one setting indicates that the first CORESET is associated with a first set of reference signals (RS) for beam fault detection (BFD), and the second CORESET is associated with either the first set of RS or a second set of RS for BFD, and is configured to monitor at least one PDCCH candidate based on beam fault detection by evaluating radio link quality for at least one of the first set of RS and the second set of RS.

[0097] In some embodiments, the at least one PDCCH candidate includes at least one of a first PDCCH candidate in a first search space associated with the first CORESET and a second PDCCH candidate in a second search space associated with the second CORESET.

[0098] In some embodiments, the terminal device includes a circuit configured to decode downlink control information (DCI) associated with at least one of the first PDCCH candidate, the second PDCCH candidate, and a combination of the first PDCCH candidate and the second PDCCH candidate.

[0099] In some embodiments, the terminal device includes a circuit configured to disable the decoding of DCI associated with at least one of the first PDCCH candidate, the second PDCCH candidate, and a combination of the first PDCCH candidate and the second PDCCH candidate, in response to the detection of a beam fault for at least one of the first set of RSs and the second set of RSs.

[0100] In some embodiments, the second CORESET is associated with a second set of RSs, and the terminal device comprises a circuit configured to monitor at least one of the first and second PDCCH candidates depending on whether no beam faults are detected in either the first or second set of RSs, and to monitor either the first or second PDCCH candidate depending on whether a beam fault is detected in at least one of the first or second set of RSs.

[0101] In some embodiments, a second CORESET is associated with a second set of RSs, and the terminal device includes a circuit configured to monitor the first PDCCH candidate without monitoring the second PDCCH candidate in response to a beam fault detected for the second set of RSs, and to monitor the second PDCCH candidate without monitoring the first PDCCH candidate in response to a beam fault detected for the first set of RSs.

[0102] In some embodiments, a second CORESET is associated with a first set of RSs including a first RS and a second RS, and the terminal device comprises a circuit configured to monitor the first PDCCH candidate without monitoring the second PDCCH candidate when a beam fault is detected for the second RS, and to monitor the second PDCCH candidate without monitoring the first PDCCH candidate when a beam fault is detected for the first RS.

[0103] In some embodiments, a second CORESET is associated with a second set of RSs, and the terminal device comprises a circuit configured to decode a DCI associated with at least one of the first PDCCH candidate, the second PDCCH candidate, and a combination of the first and second PDCCH candidates, depending on whether no beam fault is detected in either the first or second set of RSs, and to decode a DCI associated with one of the first and second PDCCH candidates depending on whether a beam fault is detected in at least one of the first or second set of RSs.

[0104] In some embodiments, a second CORESET is associated with a second set of RSs, the terminal device comprises a circuit configured to decode the DCI associated with the first PDCCH candidate without decoding the DCI associated with the second PDCCH candidate in response to a beam fault being detected for the second set of RSs, decode the DCI associated with the second PDCCH candidate without decoding the DCI associated with the first PDCCH candidate in response to a beam fault being detected for the first set of RSs, decode the DCI associated with the second PDCCH candidate by setting the weight associated with the first PDCCH candidate to 0 in response to a beam fault being detected for the first set of RSs, and decode the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate by setting the weight associated with the second PDCCH candidate to 0 in response to a beam fault being detected for the second set of RSs.

[0105] In some embodiments, a second CORESET is associated with a first set of RSs including a first RS and a second RS, and the terminal device includes a circuit configured to decode the DCI associated with the first PDCCH candidate without decoding the DCI associated with the second PDCCH candidate in response to a beam fault being detected for the second RS, decode the DCI associated with the second PDCCH candidate without decoding the DCI associated with the first PDCCH candidate in response to a beam fault being detected for the first RS, decode the DCI associated with the second PDCCH candidate by setting the weight associated with the first PDCCH candidate to 0 in response to a beam fault being detected for the first RS, and decode the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate by setting the weight associated with the second PDCCH candidate to 0 in response to a beam fault being detected for the second RS.

[0106] In some embodiments, the at least one setting may further indicate that the first PDCCH candidate in the first search space associated with the first CORESET is linked to the second PDCCH candidate in the second search space associated with the second CORESET.

[0107] In some embodiments, the second CORESET is associated with the second set of RSs, and the terminal device comprises a circuit configured to receive at least one of the first set of RSs and the second set of RSs via at least one of radio resource control (RRC) signaling, a media access control (MAC) control element (CE), and DCI.

[0108] In some embodiments, the second CORESET is associated with the first set of RSs, and the terminal device comprises a circuit configured to receive at least one RS included in the first set of RSs via at least one of RRC signaling, MAC CE, and DCI.

[0109] In some embodiments, a second CORESET is associated with a second set of RSs, and the terminal device comprises a circuit configured to determine the first set of RSs based on a third set of RSs indicated in a first transmit setting indicator (TCI) state for the first CORESET, or a third set of RSs indicated in a first TCI state for the first CORESET and a fourth set of RSs indicated in a second TCI state for the second CORESET, and to determine the second set of RSs based on the fourth set of RSs indicated in a second TCI state for the second CORESET.

[0110] In some embodiments, the two CORESETs are associated with a first set of RSs, including a first RS and / or a second RS, and the terminal device comprises a circuit configured to determine the first RS based on a third set of RSs indicated in a first transmit setting indicator (TCI) state for the first CORESET, or a third set of RSs indicated in a first TCI state for the first CORESET and a fourth set of RSs indicated in a second TCI state for the second CORESET, and to determine the second RS based on a fourth set of RSs indicated in a second TCI state for the second CORESET.

[0111] In some embodiments, the at least one setting may further indicate that the first CORESET is associated with a first value of the identity (ID), and that the second CORESET is associated with either the first value of the ID or a second value of the ID.

[0112] In some embodiments, a second CORESET is associated with a second set of RSs, and the terminal device includes a circuit configured to identify a third RS from a fifth set of RSs in response to the detection of a first beam fault for the first set of RSs, and to identify a fourth RS from a sixth set of RSs in response to the detection of a second beam fault for the second set of RSs.

[0113] In some embodiments, a second coreset is associated with a first set of RSs including a first RS and a second RS, and the terminal device includes a circuit configured to identify a third RS from a fifth set of RSs in response to the detection of a first beam fault for the first RS, and to identify a fourth RS from a sixth set of RSs in response to the detection of a second beam fault for the second RS.

[0114] In some embodiments, the terminal device comprises a circuit configured to monitor the first PDCCH candidate by associating a first set of antenna port pseudo-collocation (QCL) parameters with the third RS in response to the identification of the third RS and the detection of the second beam obstruction, and to monitor the second PDCCH candidate using a second TCI state for the second CORESET, and to monitor the second PDCCH candidate by associating a second set of antenna port QCL parameters with the fourth RS in response to the identification of the fourth RS and the detection of the first beam obstruction, and to monitor the first PDCCH candidate using a first TCI state for the first CORESET.

[0115] In some embodiments, the terminal device includes a circuit configured to monitor the first PDCCH candidate by associating a first set of antenna port QCL parameters with the third RS in response to the detection of the first and second beam faults, and in response to the identification of the third RS and the non-identification of the fourth RS, without monitoring the second PDCCH candidate; and in response to the identification of the fourth RS and the non-identification of the third RS, by associating a second set of antenna port QCL parameters with the fourth RS, without monitoring the first PDCCH candidate.

[0116] In some embodiments, the terminal device includes a circuit configured to disable monitoring of the first PDCCH candidate and the second PDCCH candidate in response to the detection of at least one of the first beam fault and the second beam fault and the identification of at least one of the third RS and the fourth RS.

[0117] In some embodiments, the second CORESET is associated with a first set of RSs, and the terminal device includes a circuit configured to monitor the first PDCCH candidate by identifying a fifth RS and / or a sixth RS from a seventh set of RSs in response to a beam obstruction being detected for at least one RS from the first set of RSs, and by associating a third set of antenna port QCL parameters with the fifth RS in response to the identification of the fifth RS, and by monitoring the second PDCCH candidate by associating a fourth set of antenna port QCL parameters with the sixth RS in response to the identification of the sixth RS.

[0118] In some embodiments, the terminal device includes a circuit configured to monitor the first PDCCH candidate by associating the third set of antenna port QCL parameters with the fifth RS without monitoring the second PDCCH candidate, depending on whether the fifth RS is identified and the sixth RS is not identified; to monitor the second PDCCH candidate by associating the fourth set of antenna port QCL parameters with the sixth RS without monitoring the first PDCCH candidate, depending on whether the fifth RS is not identified and the sixth RS is identified; and to disable monitoring of the first and second PDCCH candidates depending on whether at least one of the fifth RS and the sixth RS is not identified.

[0119] In some embodiments, the terminal device comprises a circuit configured to perform at least one of the following: decoding a DCI associated with a first PDCCH candidate by associating a first set of antenna port QCL parameters with the third RS in response to the third RS being identified and the second beam obstruction not being detected; decoding a DCI associated with a second PDCCH candidate using a second TCI state for the second CORESET; and decoding a DCI associated with a combination of the first and second PDCCH candidates.

[0120] In some embodiments, the terminal device comprises a circuit configured to perform at least one of the following: decoding a DCI associated with a first PDCCH candidate using a first TCI state for a first CORESET in response to the identification of the fourth RS and the detection of a first beam obstruction; decoding a DCI associated with a second PDCCH candidate by associating a second set of antenna port QCL parameters with the fourth RS; and decoding a DCI associated with a combination of the first PDCCH candidate and the second PDCCH candidate.

[0121] In some embodiments, the terminal device includes a circuit configured to decode the DCI associated with the first PDCCH candidate by associating the first set of antenna port QCL parameters with the third RS, without decoding at least one of the DCI associated with the second PDCCH candidate and the DCI associated with the combination of the first and second PDCCH candidates, depending on whether the first and second beam faults are detected and the third RS is identified and the fourth RS is not identified; and to decode the DCI associated with the second PDCCH candidate by associating the second set of antenna port QCL parameters with the third RS, depending on whether the third RS is not identified and the fourth RS is identified, depending on whether the third RS is identified and the fourth RS is identified.

[0122] In some embodiments, the terminal device includes a circuit configured to disable the decoding of at least one of the DCIs associated with the first PDCCH candidate, the DCI associated with the second PDCCH candidate, and the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate, depending on whether at least one of the first beam fault and the second beam fault is detected and at least one of the third RS and the fourth RS is not identified.

[0123] In some embodiments, the terminal device includes a circuit configured to decode the DCI associated with the first PDCCH candidate by associating the third set of antenna port QCL parameters with the fifth RS when the fifth RS is identified, and to decode the DCI associated with the second PDCCH candidate by associating the fourth set of antenna port QCL parameters with the sixth RS when the sixth RS is identified.

[0124] In some embodiments, the terminal device comprises a circuit which, depending on whether the fifth RS is identified and the sixth RS is not identified, decodes the DCI associated with the first PDCCH candidate by associating the third set of antenna port QCL parameters with the fifth RS, without decoding at least one of the DCI associated with the second PDCCH candidate and the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate, and depending on whether the fifth RS is not identified and the sixth RS is identified, decodes the DCI associated with the first PDCCH candidate and the first PDCC The system is configured to decode the DCI associated with the second PDCCH candidate by associating the fourth set of antenna port QCL parameters with the sixth RS without decoding at least one of the DCIs associated with the combination of the H candidate and the second PDCCH candidate, and to disable the decoding of at least one of the DCIs associated with the first PDCCH candidate, the DCI associated with the second PDCCH candidate, and the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate, depending on whether at least one of the fifth RS and the sixth RS was identified.

[0125] In some embodiments, the at least one PDCCH candidate is monitored from or after a certain time, and the terminal device comprises a circuit configured to decode a DCI associated with at least one of the first PDCCH candidate, the second PDCCH candidate, and a combination of the first PDCCH candidate and the second PDCCH candidate from or after the time, where the time is indicated by a slot or symbol.

[0126] In some embodiments, the terminal device comprises a circuit that receives at least one setting relating to a CORESET, the at least one setting indicating that the CORESET is associated with a plurality of sets of beam fault detection (BFD) reference signals (RS), the CORESET is associated with a first transmit setting indicator (TCI) state and a second TCI state, and PDCCH candidates in the search space associated with the CORESET are associated with the first TCI state and a second TCI state, and is configured to monitor PDCCH candidates based on beam fault detection by evaluating radio link quality for at least one of the plurality of sets of RS.

[0127] In some embodiments, the terminal device includes a circuit configured to decode the DCI associated with the PDCCH candidate.

[0128] In some embodiments, the terminal device includes a circuit configured to disable the decoding of the DCI associated with the PDCCH candidate in response to the detection of a beam fault in at least one of a plurality of sets of RSs.

[0129] In some embodiments, the first TCI state and the second TCI state are two active states. For example, the first TCI state and the second TCI state may be activated for CORESET via at least one of MAC CE and DCI.

[0130] In some embodiments, the terminal device includes a circuit configured to monitor PDCCH candidates having a first TCI state and a second TCI state in response to no beam fault being detected in any of the multiple sets of RS, and to monitor PDCCH candidates having one of the first TCI state and a second TCI state in response to the detection of the beam fault in at least one of the multiple sets of RS.

[0131] In some embodiments, the plurality of sets of RSs include a first set of RSs and a second set of RSs, the terminal device comprises a circuit configured to monitor PDCCH candidates using the first TCI state in response to the detection of a beam fault for the second set of RSs, and to monitor PDCCH candidates using the second TCI state in response to the detection of a beam fault for the first set of RSs.

[0132] In some embodiments, the set of RSs includes a third set of RSs, which includes a first RS and a second RS, and the terminal device comprises a circuit configured to monitor PDCCH candidates using the first TCI state in response to a beam fault being detected for the second RS, and to monitor PDCCH candidates using the second TCI state in response to a beam fault being detected for the first RS.

[0133] In some embodiments, the plurality of sets of RSs include a first set of RSs and a second set of RSs, the terminal device comprises a circuit configured to decode DCIs associated with a PDCCH candidate having a first TCI state and a second TCI state in response to no beam faults being detected in either of the first set of RSs or the second set of RSs, and to decode DCIs associated with a PDCCH candidate having one of the first TCI state and a second TCI state in response to a beam fault being detected in at least one of the first set of RSs or the second set of RSs.

[0134] In some embodiments, the plurality of sets of RSs include a first set of RSs and a second set of RSs, the terminal device comprises a circuit configured to decode a DCI associated with a PDCCH candidate using the first TCI state in response to a beam fault being detected for the second set of RSs, and to decode a DCI associated with a PDCCH candidate using the second TCI state in response to a beam fault being detected for the first set of RSs.

[0135] In some embodiments, the plurality of sets of RSs include a third set of RSs, which includes a first RS and a second RS, and the terminal device comprises a circuit configured to decode a DCI associated with a PDCCH candidate using the first TCI state in response to a beam fault being detected for the second RS, and to decode a DCI associated with a PDCCH candidate using the second TCI state in response to a beam fault being detected for the first RS.

[0136] In some embodiments, the multiple sets of RS include a first set of RS and a second set of RS, and the terminal device comprises a circuit configured to receive at least one of the first set of RS and the second set of RS via at least one of RRC signaling, MAC CE, and DCI.

[0137] In some embodiments, the plurality of sets of RS include a first set of RS and a second set of RS, the terminal device comprises a circuit configured to determine the first set of RS based on a fourth set of RS indicated in a first TCI state for the CORESET, and the second set of RS based on a fifth set of RS indicated in a second TCI state for the CORESET.

[0138] In some embodiments, the plurality of sets of RSs include a third set of RSs, which includes a first RS and a second RS, and the terminal device comprises a circuit configured to determine the first RS based on a fourth set of RSs indicated in a first TCI state for the CORESET, determine the second RS based on a fifth set of RSs indicated in a second TCI state for the CORESET, and determine the third set of RSs based on a combination of the fourth set of RSs and the fifth set of RSs.

[0139] In some embodiments, the at least one setting may further indicate that the CORESET is associated with an identity (ID) value.

[0140] In some embodiments, the multiple sets of RS include a first set of RS and a second set of RS, the terminal device comprises a circuit configured to identify a third RS from a sixth set of RS in response to the detection of a first beam fault for the first set of RS, and to identify a fourth RS from the sixth set of RS or a seventh set of RS in response to the detection of a second beam fault for the second set of RS.

[0141] In some embodiments, the plurality of sets of RSs include a third set of RSs, which includes a first RS and a second RS, and the terminal device comprises a circuit configured to identify a third RS from a sixth set of RSs in response to the detection of a first beam obstruction for the first RS, and to identify a fourth RS from the sixth set of RSs or a seventh set of RSs in response to the detection of a second beam obstruction for the second RS.

[0142] In some embodiments, the terminal device comprises a circuit configured to monitor the PDCCH candidate or decode the DCI associated with the PDCCH candidate by associating a first set of antenna port pseudo-collocation (QCL) parameters with the third RS in response to the third RS being recognized and no second beam obstruction being detected, and / or to monitor the PDCCH candidate or decode the DCI associated with the PDCCH candidate by utilizing the second TCI state for the CORESET, and to monitor the PDCCH candidate or decode the DCI associated with the PDCCH candidate by utilizing the first TCI state for the CORESET in response to the fourth RS being identified and no first beam obstruction being detected, and / or to monitor the PDCCH candidate or decode the DCI associated with the PDCCH candidate by associating a second set of antenna port QCL parameters with the fourth RS.

[0143] In some embodiments, the terminal device includes a circuit configured to monitor the PDCCH candidate or decode the DCI associated with the PDCCH candidate by associating the first set of antenna port QCL parameters with the third RS in response to the detection of the first and second beam faults, and the fourth RS not being identified, and by associating the second set of antenna port QCL parameters with the third RS in response to the identification of the third RS, and by monitoring the PDCCH candidate or decode the DCI associated with the PDCCH candidate by associating the second set of antenna port QCL parameters with the third RS in response to the identification of the fourth RS not being identified.

[0144] In some embodiments, the terminal device includes a circuit configured to disable monitoring of the PDCCH candidate and / or disable decoding of the DCI associated with the PDCCH candidate in response to the detection of at least one of the first beam fault and the second beam fault and the failure to identify at least one of the third RS and the fourth RS.

[0145] In some embodiments, the multiple sets of RSs include a third set of RSs, the terminal device comprises a circuit configured to identify a fifth RS and / or a sixth RS from an eighth set of RSs in response to a beam obstruction being detected for at least one RS in the third set of RSs, monitor the PDCCH candidate or decode the DCI associated with the PDCCH candidate by associating a third set of antenna port QCL parameters with the fifth RS in response to the identification of the fifth RS, and monitor the PDCCH candidate or decode the DCI associated with the PDCCH candidate by associating a fourth set of antenna port QCL parameters with the sixth RS in response to the identification of the sixth RS.

[0146] In some embodiments, the terminal device comprises a circuit configured to monitor the PDCCH candidate or decode the DCI associated with the PDCCH candidate by associating the third set of antenna port QCL parameters with the fifth RS depending on whether the fifth RS is identified and the sixth RS is not identified; to monitor the PDCCH candidate or decode the DCI associated with the PDCCH candidate by associating the fourth set of antenna port QCL parameters with the sixth RS depending on whether the fifth RS is not identified and the sixth RS is identified; and to disable monitoring of the PDCCH candidate or decode the DCI associated with the PDCCH candidate depending on whether at least one of the fifth RS and the sixth RS is not identified.

[0147] In some embodiments, the at least one PDCCH candidate is monitored from or after a certain point in time, and the terminal device comprises a circuit configured to decode a DCI associated with the PDCCH candidate from or after the point in time, where the point in time is indicated by a slot or symbol.

[0148] In some embodiments, the terminal device comprises a circuit that receives at least one setting relating to at least one control resource set (CORESET), wherein the at least one setting indicates that the at least one CORESET is associated with at least one set of reference signals (RS) for beam fault detection (BFD), and is configured not to monitor any PDCCH candidates within the at least one CORESET in response to a beam fault being detected by evaluating the radio link quality on at least one RS included in the at least one set of RS.

[0149] Figure 5 is a schematic block diagram of a device 500 suitable for realizing an embodiment of the present disclosure. The device 500 can be considered as another exemplary embodiment of the network device 110, terminal device 130, and / or TRP 120 shown in Figure 1. Thus, the device 500 can be realized in or as at least a part of the network device 110, terminal device 130, and / or TRP 130, as shown in Figure 1.

[0150] As illustrated, the device 500 comprises a processor 510, a memory 520 coupled to the processor 510, appropriate transmitters (TX) and receivers (RX) 540 coupled to the processor 510, and a communication interface coupled to the TX / RX 540. The memory 520 stores at least a portion of the program 530. The TX / RX 540 is used for bidirectional communication. The TX / RX 540 has at least one antenna to facilitate communication, although the access node referred to herein may actually have multiple antennas. The communication interface can represent any interface necessary for communication with other network elements, such as an X2 interface for bidirectional communication between eNBs, an S1 interface for communication between a mobility management entity (MME) / serving gateway (S-GW) and an eNB, an Un interface for communication between an eNB and a relay node (RN), or a Uu interface for communication between an eNB and a terminal device.

[0151] It is assumed that program 530 includes program instructions that, when executed by the associated processor 510 as described herein with reference to Figures 1 to 4, enable the device 500 to operate according to embodiments of the present disclosure. Embodiments of the present can be implemented by computer software executable by the processor 510 of the device 500, by hardware, or by a combination of software and hardware. The processor 510 can be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 510 and memory 520 can form a processing means 550 suitable for implementing various embodiments of the present disclosure.

[0152] Memory 520 may be of any type suitable for a local technology network and can be implemented using any suitable data storage technology, such as non-temporary computer-readable storage media, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. Although only one memory 520 is shown in device 500, several physically different memory modules may be present in device 500. Processor 510 may be of any type suitable for a local technology network and may include, as non-limiting examples, one or more of general-purpose computers, dedicated computers, microprocessors, digital signal processors (DSPs), and processors based on multi-core processor architectures. Device 500 may have multiple processors, for example, application-specific integrated circuit chips that are time-dependent to a clock that synchronizes the main processor.

[0153] Overall, various embodiments of the Disclosure can be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. Some embodiments may be implemented in hardware, while others may be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device. Various embodiments of the Disclosure are illustrated and described using block diagrams, flowcharts, or any other pictorial representation, but it should be understood that the blocks, devices, systems, techniques, or methods described herein can be implemented, in non-limiting examples, in hardware, software, firmware, dedicated circuitry or logic, general-purpose hardware or controllers or other computing devices, or any combination thereof.

[0154] This disclosure also provides at least one computer program product tangibly stored on a non-temporary computer-readable storage medium. The computer program product includes computer-executable instructions, such as instructions contained in a program module, which are executed within a device on a real or virtual processor of interest to perform the processes or methods described above with reference to Figures 2, 3 and / or 4. Generally, a program module includes routines, programs, libraries, objects, classes, components, data structures, etc., that perform a specific task or implement a specific abstract data type. In various embodiments, the functions of program modules can be combined or separated from program modules as needed. The machine-executable instructions of a program module can be executed within a local or distributed device. In a distributed device, program modules may reside in both local and remote storage media.

[0155] Program code for performing the methods of this disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a dedicated computer, or other programmable data processing device, and when executed by the processor or controller, the program code may implement the functions / operations specified in the flowcharts and / or block diagrams. The program code may run entirely on a machine, partially on a machine, as an independent software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0156] The program code described above may be implemented on a machine-readable medium, which may be any tangible medium that can contain or store programs used by or associated with an instruction execution system, device, or apparatus. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or apparatus, or any suitable combination of the aforementioned mediums. More specific examples of machine-readable storage media may include electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above.

[0157] While the operations have been described in a specific order, it should not be understood that, in order to obtain the desired results, these operations must be performed in the specific order shown, or in a sequential order, or that all of the described operations must be performed. In some cases, multitasking or parallel processing may be advantageous. Similarly, while some specific implementation details are included in the above discussion, these should not be interpreted as limitations on the scope of this disclosure, but rather as descriptions of features that may be specific to a particular embodiment. Some features described in the context of individual embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may be implemented separately or in any suitable subcombination in multiple embodiments.

[0158] While this disclosure has been described in language specific to structural features and / or methodological behavior, it should be understood that the disclosure as defined in the attached claims is not necessarily limited to the specific features or behaviors described above. Rather, the specific features and behaviors described above are disclosed as exemplary forms of implementing the claims.

Claims

1. Means for receiving a setting indicating a first control resource set (CORESET) associated with a first transmission configuration indicator (TCI) state for receiving a physical downlink control channel (PDCCH), Means for evaluating downlink radio link quality based on a first set of reference signals (RS) and a second set of reference signals determined based on a set of reference signals associated with the first TCI state in order to detect beam faults, Equipped with, A terminal device that counts as three PDCCH candidates for PDCCH reception, where the first PDCCH candidate for the first CORESET and the second PDCCH candidate for the second CORESET are the terminal device.

2. When a single frequency network (SFN) scheme is configured, the second set of RSs is determined based on the set of RSs associated with the second TCI state for the first CORESET, If the non-SFN scheme is set, the second set of RS is determined based on the set of RS associated with the third TCI state for the third CORESET. The first CORESET and the third CORESET each belong to two different CORESET pools. The terminal device according to claim 1.

3. The first CORESET and the second CORESET belong to the same CORESET pool. The terminal device according to claim 1.

4. Means for transmitting a setting indicating a first control resource set (CORESET) associated with a first transmission configuration indicator (TCI) state for receiving a physical downlink control channel (PDCCH), Means for determining a first set of reference signals (RS) and a second set of RS for evaluating downlink radio link quality in order to detect beam faults, Equipped with, The first set of RS is determined based on the set of RS associated with the first TCI state. A network device that counts as three PDCCH candidates for PDCCH reception, where the first PDCCH candidate for the first CORESET and the second PDCCH candidate for the second CORESET are the network devices.

5. When a single frequency network (SFN) scheme is configured, the second set of RSs is determined based on the set of RSs associated with the second TCI state for the first CORESET, If the non-SFN scheme is set, the second set of RS is determined based on the set of RS associated with the third TCI state for the third CORESET. The first CORESET and the third CORESET each belong to two different CORESET pools. The network device according to claim 4.

6. The first CORESET and the second CORESET belong to the same CORESET pool. The network device according to claim 4.

7. Receiving a setting that indicates a first control resource set (CORESET) associated with the state of a first transmission configuration indicator (TCI) for receiving a physical downlink control channel (PDCCH), To detect beam faults, the downlink radio link quality is evaluated based on a first set of reference signals (RS) and a second set of reference signals determined based on the first TCI state, Includes, A method performed by a terminal device, wherein the first PDCCH candidate for the first CORESET and the second PDCCH candidate for the second CORESET are counted as three PDCCH candidates for PDCCH reception.

8. When a single frequency network (SFN) scheme is configured, the second set of RSs is determined based on the set of RSs associated with the second TCI state for the first CORESET, If the non-SFN scheme is set, the second set of RS is determined based on the set of RS associated with the third TCI state for the third CORESET. The first CORESET and the third CORESET each belong to two different CORESET pools. The method according to claim 7.

9. The first CORESET and the second CORESET belong to the same CORESET pool. The method according to claim 7.

10. Transmitting a setting that indicates a first control resource set (CORESET) associated with the state of a first transmission configuration indicator (TCI) for receiving a physical downlink control channel (PDCCH), To determine a first set of reference signals (RS) and a second set of RS for evaluating downlink radio link quality in order to detect beam faults, Includes, The first set of RS is determined based on the set of RS associated with the first TCI state. A method performed by a network device, wherein a first PDCCH candidate for a first CORESET and a second PDCCH candidate for a second CORESET are counted as three PDCCH candidates for PDCCH reception.

11. When a single frequency network (SFN) scheme is configured for PDCCH, the second set of RSs is determined based on the set of RSs associated with the second TCI state for the first CORESET. If the non-SFN scheme is set, the second set of RS is determined based on the set of RS associated with the third TCI state for the third CORESET. The first CORESET and the third CORESET each belong to two different CORESET pools. The method according to claim 10.

12. The first CORESET and the second CORESET belong to the same CORESET pool. The method according to claim 10.

13. The terminal device according to claim 1, wherein when a non-SFN scheme is set for PDCCH reception, the first PDCCH candidate for the first CORESET and the second PDCCH candidate for the second CORESET are counted as three PDCCH candidates for PDCCH reception.

14. The method according to claim 7, wherein when a non-SFN scheme is set for PDCCH reception, the first PDCCH candidate for the first CORESET and the second PDCCH candidate for the second CORESET are counted as three PDCCH candidates for PDCCH reception.

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