Terminal device, network device and method

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 on enhancing support for the introduction of multi-transmit 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 that improve 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 transmission that is simultaneous with multi-panel reception.

[0003] To improve the reliability and robustness of the PDCCH, many schemes have been agreed upon to implement 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] Overall, exemplary embodiments of the present disclosure provide a communication method, apparatus, and computer storage medium.

Means for Solving the Problems

[0005] In a first aspect, a communication method is provided. The method includes receiving, at a terminal device, at least one configuration related to a first control resource set (CORESET) and a second CORESET, where the at least one configuration indicates that the first CORESET is associated with a first set of reference signals (RSs) for beam failure detection (BFD), and the second CORESET is associated with the first set of RSs or a second set of RSs for BFD, and monitoring at least one PDCCH candidate based on detection of a beam failure by evaluating radio link quality for at least one of the first set of RSs and the second set of RSs.

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

[0007] In a third aspect, a communication method is provided. The method includes receiving, at a terminal device, at least one setting regarding 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 failure detection (BFD), and not monitoring any PDCCH candidates within the at least one CORESET in response to detecting a beam failure by evaluating the radio link quality for at least one RS included in the at least one set of RS.

[0008] In a fourth aspect, a terminal device is provided. The terminal device includes a processor and a memory coupled to the processor. The memory stores instructions that, when executed by the processor, cause the terminal device to execute the method according to the first, second, or third aspect of the present disclosure.

[0009] In a fifth aspect, a computer-readable medium storing instructions is provided. The instructions, when executed on at least one processor, cause the at least one processor to execute the method according to the first, second, or third aspect of the present disclosure.

[0010] In a sixth aspect, a computer program product stored on a computer-readable medium and including machine-executable instructions is provided. When the machine-executable instructions are executed, the method according to the first, second, or third aspect of the present disclosure is caused to be executed by a machine.

[0011] It should be understood that the summary section of the invention is not intended to identify key or essential features of the embodiments of the present disclosure, nor to limit the scope of the present disclosure. Other features of the present disclosure will be readily understood from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[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]

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[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. 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, and it should be understood that they do not imply any limitation on the scope of the present disclosure. The disclosure described herein 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 "one", and "the" include the plural unless the context clearly dictates otherwise. The terms "comprising" and variations thereof are to be understood as open terms meaning "including, but not limited to". The term "based on" is to be understood as "at least partially based on". The terms "some embodiments" and "embodiments" are to be understood as "at least some embodiments". The term "another embodiment" is to be understood 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 below.

[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 a 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 an analog and / or digital hardware circuit and a combination of software / firmware. As yet another example, a circuit may be any part of a hardware processor that includes a digital signal processor, software, and one or more memories that cooperate to cause a device, such as a terminal device or a 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" includes only a hardware circuit or one or more processors, or a part of a hardware circuit or one or more processors, and implementations of its (or their) associated software and / or firmware.

[0024] As described above, multiple schemes have been agreed upon to improve the reliability and robustness of the PDCCH. For example, in a non-single frequency network (non-SFN) scheme, two search space (SS) sets associated with a corresponding control resource set (CORESET) can be activated for PDCCH repetition in order to enable PDCCH transmission using two transmission configuration indication (TCI) states (e.g., corresponding to different beams). The PDCCH candidates within the two CORESETs may be linked together to transmit the same PDCCH repetition. For 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 within a given SS set is associated with both TCI states of the CORESET.

[0025] Beam blockage may affect the reliability and robustness of PDCCH. Therefore, when implementing the above schemes, it is necessary to consider the impact of beam blockage. However, regarding these schemes, the behavior of the terminal device in the case of partial beam blockage (for example, some beams are blocked, but other beams are not blocked, or some beams or reference signals related to one TRP are blocked, but some beams or reference signals related to another TRP are not blocked) has not yet been defined.

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

[0027] Hereinafter, the terms "PDCCH monitoring occasion", "PDCCH monitoring occasion", "PDCCH transmission occasion", "PDCCH transmission", "PDCCH candidate", "PDCCH reception occasion", and "PDCCH repetition" can be used interchangeably. Each of the characters "monitoring", "detection", and "decoding" can be used interchangeably.

[0028] FIG. 1 shows an exemplary communication network 100 in which embodiments of the present disclosure can be implemented. As shown in FIG. 1, the network 100 includes a network device 110 coupled to two TRPs / panels 120-1 and 120-2 (collectively referred to as TRP 120 or individually referred to as TRP 120). The network 100 further includes a terminal device 130 served by the network device 110. It should be understood that the number of network devices, terminal devices, and TRPs shown in FIG. 1 is for illustrative purposes only and no limitation is implied. The network 200 may include any suitable number of devices suitable for implementing embodiments of the present disclosure.

[0029] As used herein, the term "terminal device" means any device having wireless or wired communication capabilities. Examples of terminal devices include, but are not limited to, user equipment (UE), 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 Everything (IoE) devices, machine type communication (MTC) devices, in-vehicle devices for vehicle-to-everything (V2X) communication, etc. Here, "X" in V2X represents a pedestrian, a vehicle, or infrastructure / network, or an image acquisition device such as a digital camera, a game device, a music storage and playback device, or an Internet appliance enabling wireless or wired Internet access and browsing. Hereinafter, for the sake of explanation, some embodiments will be described with reference to a UE as an example of the terminal device 130.

[0030] The term "network device" or "base station" (BS) as used herein means a device that can provide or host a cell or coverage with which a terminal device can communicate. Examples of network devices include, but are not limited to, Node B (NodeB or NB), evolved Node B (eNodeB or eNB), next-generation Node B (gNB), remote radio unit (RRU), radio head (RH), remote radio head (RRH), femto node, low-power nodes such as pico nodes, etc. The term "TRP" means an antenna array (having one or more antenna elements) available by a network device located at a specific geographical location. For example, a network device may be coupled to a plurality of 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 FIG. 1). One of the first network device and the second network device may be in a master node, and the other may be in a secondary node. The first network device and the second network device 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 from at least one of the first network device and the second network device to the terminal device 130. 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 resetting of the terminal device set by the second network device can be transmitted from the second network device directly or via the first network device to the terminal device. The information may be transmitted via any one of radio resource control (RRC) signaling, media access control (MAC) control element (CE), or downlink control information (DCI).

[0032] As shown in FIG. 1, the network device 110 may communicate with the terminal device 130 via the TRPs 120-1 and 120-2. Each of the TRPs 120 can provide a plurality of beams for communicating with the terminal device 130. For example, the TRP 120-1 can include four beams 121-1, 121-2, 121-3, and 121-4 (collectively referred to as "beam 121" or individually as "beam 121"), while the TRP 120-2 may also 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 FIG. 1 is provided for illustrative purposes only and does not imply any limitation. The TRP 120 can provide any suitable number of beams suitable for implementing the embodiments of the present disclosure.

[0033] Communication in the network 100 can conform to any suitable 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 (registered trademark)), Code Division Multiple Access (CDMA), and Global System for Mobile Communications (GSM). Further, the communication can be performed according to any generation of communication protocol known currently or developed in the future. Examples of communication protocols include, but are not limited to, the 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, due to inaccurate adjustment of the beam or some other reason, if the network device 110 cannot reach the terminal device 130 via at least one control channel (e.g., PDCCH) or at least one RS, a beam failure may occur. For example, the terminal device 130 can detect this situation by estimating the quality of the hypothetical PDCCH reception transmitted on the beam (e.g., the beam from TRP 120-1 or 120-2) that the network device 110 uses to reach the terminal device 130. To perform BFD, the terminal device 130 may estimate the quality of the hypothetical PDCCH reception based on the layer 1 reference signal received power (L1-RSRP) or the layer 1 signal-to-interference-plus-noise ratio (L1-SINR) of a certain reference signal (RS). Hereinafter, this reference signal may be referred to as "BFD RS" or "RS for BFD". Examples of BFD RS may include, but are not limited to, periodic channel state information reference signal (CSI-RS), synchronization signal block (SSB), or a combination thereof.

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

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

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

[0038] In some embodiments, the at least one setting can set a first set of search spaces associated with a first CORESET. In some embodiments, the at least one setting can set a second set of search spaces associated with a second CORESET. In some embodiments, the at least one setting can set a first set of PDCCH candidates within a first search space of the first set of search spaces. In some embodiments, the at least one setting can set a second set of PDCCH candidates within a second search space of the second set of search spaces. In some embodiments, the at least one setting may be set such that a first PDCCH candidate within a 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 within a second search space of the second set of search spaces associated with a second CORESET. For example, the terminal device knows the link or association or relationship before decoding the PDCCH or DCI within the first and second PDCCH candidates. In some embodiments, the first and second PDCCH candidates may be used for PDCCH repetition. For example, the encoding and / or rate matching of the PDCCH or the DCI within the PDCCH within the first PDCCH candidate and / or the second PDCCH candidate is based on one repetition (for example, the PDCCH or the DCI within one of the first and second PDCCH candidates). For example, for other repetitions, the same encoded bits are repeated. For another example, each repetition 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 BFD RSs and the second CORESET is associated with the first set of BFD RSs or the second set of RSs. In some embodiments, the first CORESET may be associated with the first set of BFD RSs without setting, and the second CORESET may be associated with the first set of BFD RSs or the second set of RSs without setting.In some embodiments, the at least one configuration may be transmitted / received via at least one of 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 configured via at least one of RRC signaling, MAC CE, and DCI. In some embodiments, neither of the first set of RSs and the second set of RSs may be configured via at least one of 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 for BFD. For example, the first CORESET (also referred to as "CORESET A") may be associated with the first set of RSs for BFD (also referred to as "BFD RS set S1"), and the second CORESET (also referred to as "CORESET B") may be associated with the second set of RSs for BFD (also referred to as "BFD RS set S2"). In some embodiments, the number of RSs included in BFD RS set S1 may be any of {1, 2, 3, 4}. The number of RSs included 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 an identity (ID), and CORESET B may be associated with a second value of the ID. For example, CORESET A may be set to have ID = X and CORESET B may be set to have ID = Y, where X and Y may be selected from a value set W, and W = {N / A, 0, 1}. For example, X may be different from Y. For example, the 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, the first CORESET (i.e., CORESET A) and the second CORESET (i.e., CORESET B) may be associated with one set of BFD RSs. In some embodiments, CORESET A and CORESET B may be associated with the same value of an ID (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 the value set W, and 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 value of an ID (e.g., ID2). For example, ID2 may have a value different from any within 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 that is different from both S1 and S2. For example, the BFD RS set S3 may include up to two RSs, and each RS may be QCLed or associated with the TCI state of CORESET A or CORESET B. For example, for each set / pair of CORESETs having a linked search space set 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 a beam obstruction 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 radio link quality of all corresponding resource settings within at least one BFD RS set (e.g., S1, S2, or S3), or the radio link quality of at least one corresponding resource setting within a BFD RS set (e.g., S3) used by the terminal device 130 to evaluate the radio link quality, is below the threshold Q out,LR If it is worse than, it means that the BFD RS set is malfunctioning or one TRP / link is malfunctioning.

[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 failure 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 failure is detected for at least one of S1 and S2, the terminal device 130 may monitor the first PDCCH candidate or the second PDCCH candidate. In some embodiments, if a beam failure 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. For example, if a beam failure 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 failure is detected for S2, the terminal device 130 may decide or determine not to monitor the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the second PDCCH candidate. Alternatively, or in addition, if a beam failure is detected for S1, the terminal device 130 may monitor the second PDCCH candidate without monitoring the first PDCCH candidate. Alternatively, or in addition, if a beam failure is detected for S1, the terminal device 130 may decide or determine not to monitor the first PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the first PDCCH candidate. Alternatively, or in addition, if a beam failure 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 failure is detected for at least one of S1 and S2, 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 or abandon or ignore the first PDCCH candidate and the second PDCCH candidate.

[0044] In some embodiments, CORESET A and CORESET B may be associated with one BFD RS set (e.g., S1 or S2 or S3). The BFD RS set may include a first RS and a second RS. In some embodiments, when a beam failure is detected for the second RS, the terminal device 130 may monitor the first PDCCH candidate without monitoring the second PDCCH candidate. Alternatively, or in addition, when a beam failure is detected for the second RS, the terminal device 130 may determine or decide not to monitor the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the second PDCCH candidate. In some embodiments, when a beam failure is detected for the first RS, the terminal device 130 may monitor the second PDCCH without monitoring the first PDCCH candidate. Alternatively, or in addition, when a beam failure is detected for the first RS, the terminal device 130 may determine or decide not to monitor the first PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the first PDCCH candidate. Alternatively, or in addition, when a beam failure is detected for at least one of the first RS and the second RS, the terminal device 130 may not need to monitor either the first PDCCH candidate or the second PDCCH candidate. Alternatively, or in addition, when a beam failure is detected for at least one of the first RS and the second RS, the terminal device 130 may determine or decide not to monitor either the first PDCCH candidate or the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the first PDCCH candidate and the second PDCCH candidate.

[0045] In some embodiments, the terminal device 130 may decode / detect 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.

[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 failure is detected for either S1 or S2, the terminal device 130 may decode / detect 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. In some embodiments, if a beam failure is detected for at least one of S1 and S2, the terminal device 130 may decode / detect DCI associated with one of the first PDCCH candidate and the second PDCCH candidate. For example, if a beam failure is detected for S1, the terminal device 130 may decode / detect DCI associated with the second PDCCH candidate without decoding DCI associated with the first PDCCH candidate. For another example, if a beam failure is detected for S1, the terminal device 130 may decide or determine not to decode / detect DCI associated with the first PDCCH candidate, or the terminal device 130 may discard or abandon or ignore DCI associated with the first PDCCH candidate. In some embodiments, if a beam failure is detected for S1, the terminal device 130 may decode / detect DCI associated with a 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 failure is detected for S2, the terminal device 130 may decode / detect DCI associated with the second PDCCH candidate without decoding DCI associated with the first PDCCH candidate. For example, if a beam failure is detected for S2, the terminal device 130 may decide or determine not to decode / detect DCI associated with the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore DCI associated with the second PDCCH candidate.In some embodiments, when a beam obstruction is detected for S2, 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 second PDCCH candidate to 0. In some embodiments, when a beam obstruction is detected for at least one of S1 and S2, the terminal device 130 may not decode / detect the DCI associated with any one of the first PDCCH candidate and the second PDCCH candidate. For example, when a beam obstruction is detected for at least one of S1 and S2, the terminal device 130 may determine or decide not to decode / detect the DCI associated with any one of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the DCI associated with any one of the first PDCCH candidate and the second PDCCH candidate. Alternatively, when a beam obstruction 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, when a beam obstruction is detected for at least one of S1 and S2, the terminal device 130 may determine or 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 or abandon 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 one BFD RS (e.g., S1 or S2 or S3). The BFD RS set may include a first RS and a second RS. In some embodiments, if no beam failure is detected for either the first RS or the second RS, the terminal device 130 may decode / detect DCI associated with at least one of the first PDCCH candidate, the second PDCCH candidate, and the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, if a beam failure is detected for at least one of the first RS and the second RS, the terminal device 130 may decode / detect DCI associated with one of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, if a beam failure is detected for the first RS, the terminal device 130 may decode / detect DCI associated with the second PDCCH candidate without decoding DCI associated with the first PDCCH candidate. In some embodiments, if a beam failure is detected for the first RS, the terminal device 130 may determine or decide not to decode / detect DCI associated with the first PDCCH candidate, or the terminal device 130 may discard or abandon or ignore DCI associated with the first PDCCH candidate. In some embodiments, if a beam failure is detected for the first RS, the terminal device 130 may decode 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 failure is detected for the second RS, the terminal device 130 may decode DCI associated with the first PDCCH candidate without decoding DCI associated with the second PDCCH candidate. In some embodiments, if a beam failure is detected for the second RS, the terminal device 130 may determine or decide not to decode / detect DCI associated with the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore DCI associated with the second PDCCH candidate.In some embodiments, when a beam obstruction is detected for the second 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 second PDCCH candidate to 0. In some embodiments, when a beam obstruction is detected for at least one of the first RS and the second RS, the terminal device 130 may not decode the DCI associated with any one of the first PDCCH candidate and the second PDCCH candidate. For example, when a beam obstruction is detected for at least one of the first RS and the second RS, the terminal device 130 may determine or decide not to decode / detect the DCI associated with any one of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the DCI associated with any one of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, when a beam obstruction is detected for at least one of the first RS and the second RS, the terminal device 130 may not decode the DCI associated with the combination of the first PDCCH candidate and the second PDCCH candidate. For example, when a beam obstruction is detected for at least one of the first RS and the second RS, the terminal device 130 may determine or 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 or abandon 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 RSs (i.e., S1) and a second set of RSs (i.e., S2) via at least one of radio resource control (RRC) signaling, media access control (MAC) control element (CE), and downlink control information (DCI). Alternatively, the terminal device 130 may not receive either the first set of RSs or the second set of RSs via at least one of RRC signaling, MAC CE, and DCI. Alternatively, the terminal device 130 may receive only the first set of RSs via at least one of RRC signaling, MAC CE, and DCI, or the terminal device 130 may not receive the first set of RSs via at least one of RRC signaling, MAC CE, and DCI. Alternatively, the terminal device 130 may receive only the second set of RSs via at least one of RRC signaling, MAC CE, and DCI, or the terminal device 130 may not receive the second set of RSs via at least one of RRC signaling, MAC CE, and DCI. In some embodiments, the terminal device 130 may receive both a first RS and a second RS via at least one of RRC signaling, MAC CE, and DCI. Alternatively, the terminal device 130 may not receive either the first RS or the second RS via at least one of RRC signaling, MAC CE, and DCI. Alternatively, the terminal device 130 may receive only the first RS via at least one of RRC signaling, MAC CE, and DCI, or the terminal device 130 may not receive the first RS via at least one of RRC signaling, MAC CE, and DCI. Alternatively, the terminal device 130 may receive only the second RS via at least one of RRC signaling, MAC CE, and DCI, or the 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 RSs is not received by the terminal device 130, the terminal device 130 may determine the first set of RSs based on either the third set of RSs indicated within the first TCI state for the first CORESET or the third set of RSs indicated within the first TCI state for the first CORESET and the fourth set of RSs indicated within the second TCI state for the second CORESET. In some embodiments, if the second set of RSs is not received by the terminal device 130, the terminal device 130 may determine the second set of RSs based on the fourth set of RSs indicated within 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 either the third set of RSs indicated within the first TCI state for the first CORESET or the third set of RSs indicated within the first TCI state for the first CORESET and the fourth set of RSs indicated within 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 the fourth set of RSs indicated within the second TCI state for the second CORESET.

[0050] In some embodiments, for the PDCCH repetition scheme, when a beam obstruction occurs, the terminal device 130 may identify two new beams or two RSs. For example, two CSI-RS configuration indexes, or two SS / PBCH block indexes, or one CSI-RS configuration index and one SS / PBCH block index. In some embodiments, when CORESET A and CORESET B are associated with the same BFD RS set, the terminal device 130 sends to the upper layer at least two periodic CSI-RS configuration indexes from the new beam candidate set q1, or two SS / Physical Broadcast Channel (PBCH) block indexes, or at least one periodic CSI-RS configuration index and one SS / Physical Broadcast Channel (PBCH) block index, and Q in,LR indicating whether there is a corresponding L1-RSRP measurement value that is greater than or equal to a threshold, and if so, two periodic CSI-RS configuration indexes and / or two SS / PBCH block indexes and / or one periodic CSI-RS configuration index and one SS / PBCH block index from set q1, and Q in,LR may provide a corresponding L1-RSRP measurement value that is greater than or equal to the threshold. Regarding the candidate RS ID, both the first and second fields are set to the index of the SSB in the candidate beam list whose SS-RSRP is higher than rsrp-ThresholdBFR, or the index of the CSI-RS in the candidate beam list whose CSI-RSRP is higher than rsrp-ThresholdBFR. The index of the SSB or CSI-RS is the index of the entry corresponding to the candidate beam list of the SSB or CSI-RS. Index 0 corresponds to the first entry in the candidate beam list, 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 be associated with two different BFD RS sets, for example, the first set of RSs (i.e., S1) and the second set of RSs (i.e., S2), respectively. In this case, when a beam failure is detected for S1, the terminal device 130 may identify the third RS from the fifth set of RSs. In some embodiments, CORESET A and CORESET B may be associated with one BFD RS (e.g., S1 or S2 or S3). The BFD RS set may include a first RS and a second RS. In this case, when a first beam failure is detected for the first RS, the terminal device 130 may identify the third RS from the fifth set of RSs. In some embodiments, the terminal device 130 may use the first set of antenna port QCL parameters as being associated with the third RS to monitor the first PDCCH candidate. In some embodiments, the terminal device 130 may monitor the second PDCCH candidate using the second TCI state for the second CORESET. In some embodiments, the terminal device 130 may not monitor either of the first and second PDCCH candidates. In some embodiments, when a beam failure is detected for S1, 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 or abandon or ignore the first PDCCH candidate and the second PDCCH candidate.

[0052] In some embodiments, CORESET A and CORESET B may be associated with two different BFD RS sets, respectively, for example, the first set of RS (i.e., S1) and the second set of RS (i.e., S2). In this case, when a beam failure is detected for S2, the terminal device 130 may identify the fourth RS from the sixth set of RS. In some embodiments, CORESET A and CORESET B may be associated with one BFD RS (e.g., S1 or S2 or S3). The BFD RS set may include a first RS and a second RS. In this case, when a first beam failure is detected for the second RS, the terminal device 130 may identify the fourth RS from the sixth set of RS. In some embodiments, the terminal device 130 may use a second set of antenna port QCL parameters as being associated with the fourth RS to monitor a second PDCCH candidate. In some embodiments, the terminal device 130 may monitor a first PDCCH candidate using a first TCI state for the first CORESET. In some embodiments, the terminal device 130 may not monitor either of the first and second PDCCH candidates. In some embodiments, when a beam failure is detected for S2, 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 or abandon or ignore the first PDCCH candidate and the second PDCCH candidate.

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

[0054] In some embodiments, CORESET A and CORESET B may be associated with one BFD RS (e.g., S1 or S2 or S3). The BFD RS set may include a first RS and a second RS. In some embodiments, when a beam failure 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 the seventh set of RSs. In some embodiments, in response to the fifth RS being identified, the terminal device 130 may use a third set of antenna port QCL parameters as being associated with the fifth RS to monitor a first PDCCH candidate. In some embodiments, in response to the sixth RS being identified, the terminal device 130 may use a fourth set of antenna port quasi-collocation (QCL) parameters as being associated with the sixth RS to monitor a second PDCCH candidate. Alternatively, in some embodiments, when a beam failure 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, when a beam failure 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 determine or decide not to monitor either the first PDCCH candidate or the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the first PDCCH candidate and the second PDCCH candidate.

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

[0056] In some embodiments, CORESET A and CORESET B may be associated with two different BFD RS sets, respectively, for example, the first set of RSs (i.e., S1) and the second set of RSs (i.e., S2). In this case, when a beam failure is detected for S1, the terminal device 130 may identify the third RS from the fifth set of RSs. In some embodiments, CORESET A and CORESET B may be associated with one BFD RS (e.g., S1 or S2 or S3). The BFD RS set may include a first RS and a second RS. In this case, when a first beam failure is detected for the first RS, the terminal device 130 may identify the third RS from the fifth set of RSs. In some embodiments, in response to the third RS being identified, the terminal device 130 may use the first set of antenna port QCL parameters as those 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 by 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 may not 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 determine or 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 or abandon 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 may not decode the DCI associated with any one of the first PDCCH candidate and the second PDCCH candidate.In some embodiments, the terminal device 130 may determine or decide not to decode / detect DCI associated with any one of a first PDCCH candidate, a second PDCCH candidate, and a combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore DCI associated with any one of a first PDCCH candidate, a second PDCCH candidate, and a combination of the first PDCCH candidate and the second PDCCH candidate.

[0057] In some embodiments, CORESET A and CORESET B may be associated with two different BFD RS sets respectively, for example, the first set of RS (i.e., S1) and the second set of RS (i.e., S2). In this case, when a beam failure is detected for S2, the terminal device 130 may identify the fourth RS from the sixth set of RS. In some embodiments, CORESET A and CORESET B may be associated with one BFD RS (e.g., S1 or S2 or S3). The BFD RS set may include a first RS and a second RS. In this case, when a first beam failure is detected for the second RS, the terminal device 130 may identify the fourth RS from the sixth set of RS. In some embodiments, in response to the identification of the third RS, the terminal device 130 may use the second set of antenna port QCL parameters as being 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 by 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 may not 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 determine or 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 or abandon 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 may not decode the DCI associated with any one of the first PDCCH candidate and the second PDCCH candidate.In some embodiments, the terminal device 130 may determine or decide not to decode / detect DCI associated with any one of a first PDCCH candidate, a second PDCCH candidate, and a combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore DCI associated with any one of a first PDCCH candidate, a second PDCCH candidate, and a combination of the first PDCCH candidate and the second PDCCH candidate.

[0058] In some embodiments, when 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 the first set of antenna port QCL parameters as being 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, when 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 the first set of antenna port QCL parameters as being associated with the third RS. In some embodiments, when a third RS is identified and a fourth RS is not identified, the terminal device 130 may determine or decide not to decode / detect the DCI associated with either one of the second PDCCH candidate and the combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the DCI associated with either one of the second PDCCH candidate and the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, when 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 the second set of antenna port QCL parameters as being 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, when 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 the second set of antenna port QCL parameters as being associated with the third RS.In some embodiments, when the third RS is not identified and the fourth RS is identified, the terminal device 130 may determine or decide not to decode / detect the DCI associated with either one of the first PDCCH candidate and the combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the DCI associated with either one of the first PDCCH candidate and the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, when 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 at least one of the first PDCCH candidate, the second PDCCH candidate, and the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, when at least one of the third RS and the fourth RS is not identified, the terminal device 130 may determine or decide not to decode / detect the DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, and the combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, and the combination of the first PDCCH candidate and the second PDCCH candidate.

[0059] In some embodiments, CORESET A and CORESET B may be associated with one BFD RS (e.g., S1 or S2 or S3). The BFD RS set may include a first RS and a second RS. In some embodiments, when a beam failure 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 the seventh set of RSs. In some embodiments, in response to the fifth RS being identified, the terminal device 130 may use the third set of antenna port QCL parameters as being associated with the fifth RS to decode the DCI associated with the first PDCCH candidate. In some embodiments, in response to the sixth RS being identified, the terminal device 130 may use the fourth set of antenna port QCL parameters as being associated with the sixth RS to decode the DCI associated with the second PDCCH candidate. In some embodiments, the terminal device 130 may not 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 determine or 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 or abandon 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 may not decode the DCI associated with any one of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, the terminal device 130 may determine or decide not to decode / detect the DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, and the combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, and the combination of the first PDCCH candidate and the second PDCCH candidate.

[0060] In some embodiments, when the fifth RS is identified and the sixth RS is not identified, the terminal device 130 may decode the DCI associated with the first PDCCH candidate using the third set of antenna port QCL parameters as being 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, when the fifth RS is identified and the sixth RS is not identified, the terminal device 130 may decode the DCI associated with the first PDCCH candidate using the third set of antenna port QCL parameters as being associated with the fifth RS. In some embodiments, when the fifth RS is identified and the sixth RS is not identified, the terminal device 130 may determine or decide not to decode / detect the DCI associated with any one of the second PDCCH candidate and the combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the DCI associated with any one of the second PDCCH candidate and the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, when the fifth RS is not identified and the sixth RS is identified, the terminal device 130 may decode the DCI associated with the second PDCCH candidate using the fourth set of antenna port QCL parameters as being 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, when the fifth RS is not identified and the sixth RS is identified, the terminal device 130 may decode the DCI associated with the second PDCCH candidate using the fourth set of antenna port QCL parameters as being associated with the sixth RS.In some embodiments, when the fifth RS is not identified and the sixth RS is identified, the terminal device 130 may determine or decide not to decode / detect the DCI associated with either the first PDCCH candidate or the combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the DCI associated with either the first PDCCH candidate or the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, when 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, when at least one of the fifth RS and the sixth RS is not identified, the terminal device 130 may determine or decide not to decode / detect the DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, and the combination of the first PDCCH candidate and the second PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the DCI associated with any one of the first PDCCH candidate, the second PDCCH candidate, and the 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 a certain point in time or after that 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 the point in time or after that point in time. Alternatively, or in addition, the terminal device 130 may decode the DCI associated with the second PDCCH candidate from the point in time or after that point in time. Alternatively, or in addition, the terminal device 130 may decode the DCI associated with a combination of the first PDCCH candidate and the second PDCCH candidate from the point in time or after that point in time. In some embodiments, the point in time is 28 symbols starting from the last symbol of the first PDCCH reception in a search set provided by recoverySearchSpaceId where a DCI having a cyclic redundancy check (CRC) scrambled by a cell radio network temporary identifier (C-RNTI) or a modulation and coding scheme cell radio network temporary identifier (MCS-C-RNTI) by the terminal device is detected. In some embodiments, the point in time is 28 symbols starting from the last symbol of a PDCCH reception having a DCI that schedules a PUSCH transmission having the same hybrid automatic repeat request (HARQ) process number as the transmission of the first PUSCH and has a toggled new data indicator (NDI) field value.

[0062] In some embodiments, for PDCCH repetitions, the detection / decoding of the 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 PDCCH candidate and the second PDCCH candidate, and may not decode the individual first PDCCH candidate and the second PDCCH candidate. In some embodiments, for PDCCH repetitions, 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 PDCCH repetitions, 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 the 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 the first PDCCH candidate and the combination of the first PDCCH candidate and the second PDCCH candidate. In some embodiments, for PDCCH repetitions, 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 the 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 each PDCCH candidate individually and may also decode the 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. FIG. 3 is a flowchart of an exemplary method 300 of the SFN scheme according to some embodiments of the present disclosure. The method 300 can be implemented in the terminal device 130 as shown in FIG. 1.

[0064] As shown in FIG. 3, in block 310, the terminal device 130 receives at least one setting regarding a CORESET (also referred to as "CORESET C") from the network device 110. The at least one setting may indicate at least one of that the CORESET is associated with a plurality of sets of BFD RSs, that the CORESET is associated with a first TCI state and a second TCI state, and that PDCCH candidates within the search space associated with the CORESET are associated with the first TCI state and the second TCI state.

[0065] In some embodiments, the at least one setting may indicate that CORESET C is associated with two different sets of BFD RSs. For example, CORESET C may be associated with a first set of BFD RSs (also referred to as "BFD RS set S1") and a second set of BFD RSs (also referred to as "BFD RS set S2"). In some embodiments, the number of RSs included in BFD RS set S1 may be any of {1, 2, 3, 4}. The number of RSs included 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, and 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 within the value set W. For example, ID3 may be 2 or 3.

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

[0067] In some embodiments, the at least one configuration 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 configured to have a value of an ID (e.g., ID1), where ID1 may be selected from a value set W, and 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 included in BFD RS set S1 may be any of {1, 2, 3, 4}. For example, BFD RS set S3 may include up to two RSs, and each RS may be QCLed or associated with the TCI state of CORESET C. For example, for each set / pair of CORESETs having a linked search space set, there may be an independent BFD RS set associated therewith. For example, in this case, CORESET C may be configured to have a value of an ID (e.g., ID1), where ID1 may be selected from a value set W, and W = {N / A, 0, 1}. For another example, in this case, CORESET C may be configured to have a value of an ID (e.g., ID3), and ID3 may be a value different from any within 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 detection of beam obstruction by evaluating the radio link quality for at least one of a plurality of sets of RSs.

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

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

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

[0072] In some embodiments, the plurality of sets of RSs may include a third set of RSs (i.e., S1 or S2 or S4) including a first RS and a second RS. In some embodiments, when a beam failure is detected for the second RS, the terminal device 130 may monitor PDCCH candidates using the first TCI state. In some embodiments, when a beam failure is detected for the first RS, the terminal device 130 may monitor PDCCH candidates using the second TCI state. In some embodiments, when a beam failure is detected for at least one of the first RS and the second RS, the terminal device 130 may not monitor PDCCH candidates. In some embodiments, when a beam failure is detected for at least one of the first RS and the second RS, the terminal device 130 may determine or decide not to monitor PDCCH candidates, or the terminal device 130 may discard or abandon or ignore PDCCH candidates.

[0073] In some embodiments, the terminal device 130 may decode DCI associated with PDCCH candidates. In some embodiments, when a beam failure is detected for at least one of the plurality of sets of RSs, the terminal device 130 may not decode DCI associated with PDCCH candidates. In some embodiments, when a beam failure is detected for at least one of the plurality of sets of RSs, the terminal device 130 may determine or decide not to decode DCI associated with PDCCH candidates, or the terminal device 130 may discard or abandon or ignore DCI associated with PDCCH candidates.

[0074] In some embodiments, the plurality of sets of RSs includes a first set of RSs (i.e., S1) and a second set of RSs (i.e., S2). In some embodiments, if no beam obstruction is detected for either the first set of RSs or the second set of RSs, the terminal device 130 may decode the DCI associated with the PDCCH candidates having the first TCI state and the second TCI state. In some embodiments, if a beam obstruction is detected for at least one of the first set of RSs and the second set of RSs, the terminal device 130 may decode the DCI associated with the PDCCH candidate having one of the first TCI state and the second TCI state. In some embodiments, if a beam obstruction is detected for 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 having any one of the first TCI state and the second TCI state. In some embodiments, if a beam obstruction is detected for 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 obstruction is detected for at least one of the first set of RSs and the second set of RSs, the terminal device 130 may determine or decide not to decode the DCI associated with the PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the DCI associated with the PDCCH candidate.

[0075] In some embodiments, when a beam failure is detected for the second set of RSs, the terminal device 130 may decode the DCI associated with the PDCCH candidate using the first TCI state. In some embodiments, when a beam failure is detected for the first set of RSs, the terminal device 130 may decode the DCI associated with the PDCCH candidate using the second TCI state. In some embodiments, when a beam failure is detected for 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 having any one of the first TCI state and the second TCI state. In some embodiments, when a beam failure is detected for at least one of the first set of RSs and the second set of RSs, the terminal device 130 may determine or decide not to decode the DCI associated with the PDCCH candidate having any one of the first TCI state and the second TCI state, or the terminal device 130 may discard or abandon or ignore the DCI associated with the PDCCH candidate. In some embodiments, when a beam failure is detected for 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.

[0076] In some embodiments, the plurality of sets of RSs includes a third set of RSs (i.e., S1 or S2 or S4) that includes a first RS and a second RS. In some embodiments, when a beam failure is detected for the second RS, the terminal device 130 may decode the DCI associated with the PDCCH candidate using the first TCI state. In some embodiments, when a beam failure is detected for the first RS, the terminal device 130 may decode the DCI associated with the PDCCH candidate using the second TCI state. In some embodiments, when a beam failure is detected for at least one of the first RS and the second RS, the terminal device 130 may not decode the DCI associated with the PDCCH candidate having either the first TCI state or the second TCI state. In some embodiments, when a beam failure is detected for at least one of the first RS and the second RS, the terminal device 130 may determine or decide not to decode the DCI associated with the PDCCH candidate, or the terminal device 130 may discard or abandon or ignore the DCI associated with the PDCCH candidate.

[0077] In some embodiments, the terminal device 130 may receive both the first set of RSs (i.e., S1) and the second set of RSs (i.e., S2) via at least one of radio resource control (RRC) signaling, media access control (MAC) control element (CE), and downlink control information (DCI). Alternatively, the terminal device 130 may not receive either the first set of RSs or the second set of RSs via at least one of RRC signaling, MAC CE, and DCI. Alternatively, the terminal device 130 may receive only the first set of RSs via at least one of RRC signaling, MAC CE, and DCI, or the terminal device 130 may not receive the first set of RSs via at least one of RRC signaling, MAC CE, and DCI. Alternatively, the terminal device 130 may receive only the second set of RSs via at least one of RRC signaling, MAC CE, and DCI, or the terminal device 130 may not receive the second set of RSs via at least one of RRC signaling, MAC CE, and DCI. In some embodiments, the terminal device 130 may receive both the first RS and the second RS via at least one of RRC signaling, MAC CE, and DCI. Alternatively, the terminal device 130 may not receive either the first RS or the second RS via at least one of RRC signaling, MAC CE, and DCI. Alternatively, the terminal device 130 may receive only the first RS via at least one of RRC signaling, MAC CE, and DCI, or the terminal device 130 may not receive the first RS via at least one of RRC signaling, MAC CE, and DCI. Alternatively, the terminal device 130 may receive only the second RS via at least one of RRC signaling, MAC CE, and DCI, or the 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 the first set of RSs or the first RS is not received by the terminal device 130, the terminal device 130 may determine the first set of RSs or the first RS based on the fourth set of RSs indicated within the first TCI state for the CORESET. In some embodiments, if the second set of RSs or the second RS is not received by the terminal device 130, the terminal device 130 may determine the second set of RSs or the second RS based on the fifth set of RSs indicated within the second TCI state for the CORESET. In some embodiments, the terminal device 130 may determine the third set of RSs based on a combination of the fourth set of RSs indicated within the first TCI state for CORESET C and the fifth set of RSs indicated within the second TCI state for CORESET C.

[0079] In some embodiments, for example, for the SFN scheme, if a beam obstruction 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 sends to the upper layer at least two periodic CSI-RS configuration indexes from the new beam candidate set q1 and / or at least two SS / physical broadcast channel (PBCH) block indexes or at least one periodic CSI-RS configuration index and one SS / physical broadcast channel (PBCH) block index and Q in,LR indicating whether there is a corresponding L1-RSRP measurement value that is greater than or equal to a threshold, and if so, two periodic CSI-RS configuration indexes and / or two SS / PBCH block indexes and / or one periodic CSI-RS configuration 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 the candidate RS ID, both the first and second fields are set to the index of an SSB within the candidate beam list for which the SS-RSRP is higher than rsrp-ThresholdBFR, or to the index of a CSI-RS within the candidate beam list for which the CSI-RSRP is higher than rsrp-ThresholdBFR. The index of the SSB or CSI-RS is the index of the entry corresponding to the candidate beam list for that SSB or CSI-RS. Index 0 corresponds to the first entry within the candidate beam list, index 1 corresponds to the second entry within the list, and so on. The length of this field is 12 bits.

[0080] In some embodiments, the plurality of sets of the RSs include a first set of RSs (i.e., S1) and a second set of RSs (i.e., S2). In this case, when a beam obstruction is detected for S1, the terminal device 130 may identify a third RS from the sixth set of RSs. In some embodiments, the plurality of sets of RSs include a third set of RSs (i.e., S1 or S2 or S4). The third set of RSs may include a first RS and a second RS. In this case, when a first beam obstruction is detected for the first RS, the terminal device 130 may identify a third RS from the sixth set of RSs. In some embodiments, the terminal device 130 may use a first set of antenna port quasi-collocation (QCL) parameters as being associated with the third RS to monitor PDCCH candidates or decode DCI associated with the PDCCH candidates. In some embodiments, the terminal device 130 may use the second TCI state of CORESET C to monitor PDCCH candidates or decode DCI associated with the PDCCH candidates. In some embodiments, the terminal device 130 may use a first set of antenna port quasi-collocation (QCL) parameters as being associated with the third RS and the second TCI state of CORESET C to monitor PDCCH candidates or decode DCI associated with the PDCCH candidates. In some embodiments, the terminal device 130 may not monitor PDCCH candidates. In some embodiments, the terminal device 130 may not 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 or abandon or ignore the PDCCH candidates. In some embodiments, the terminal device 130 may decide or determine not to decode DCI associated with PDCCH candidates, or the terminal device 130 may discard or abandon or ignore the DCI associated with the PDCCH candidates.

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

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

[0083] In some embodiments, the plurality of sets of RSs includes a third set of RSs (i.e., S1 or S2 or S4). The third set of RSs 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 RSs, the terminal device 130 may identify at least one of a fifth RS and a sixth RS from the eighth set of RSs. In some embodiments, in response to the fifth RS being identified, the terminal device 130 may use a third set of antenna port QCL parameters as being associated with the fifth RS to monitor PDCCH candidates or decode DCI associated with the PDCCH candidates. In some embodiments, in response to the sixth RS being identified, the terminal device 130 may use a fourth set of antenna port QCL parameters as being associated with the sixth RS to monitor PDCCH candidates or decode DCI associated with the PDCCH candidates. Alternatively, in some embodiments, if a beam obstruction is detected for at least one of the first RS and the second RS, or for the third set of RSs, the terminal device 130 may not monitor the PDCCH candidates or may not decode the DCI associated with the PDCCH candidates. In some embodiments, if a beam obstruction is detected for at least one of the first RS and the second RS, or for the third RS, the terminal device 130 may decide or determine not to monitor the PDCCH candidates, or the terminal device 130 may discard or abandon or ignore the PDCCH candidates. In some embodiments, if a beam obstruction is detected for at least one of the first RS and the second RS, or for the third RS, the terminal device 130 may decide or determine not to decode the DCI associated with the PDCCH candidates, or the terminal device 130 may discard or abandon or ignore the DCI associated with the PDCCH candidates.

[0084] In some embodiments, when a fifth RS is identified and a sixth RS is not identified, the terminal device 130 may use a third set of antenna port quasi - collocation (QCL) parameters as being associated with the fifth RS to monitor PDCCH candidates or decode DCI associated with the PDCCH candidates. In some embodiments, when the fifth RS is not identified and the sixth RS is identified, the terminal device 130 may use a fourth set of antenna port QCL parameters as being associated with the sixth RS to monitor PDCCH candidates or decode DCI associated with the PDCCH candidates. In some embodiments, when at least one of the fifth RS and the sixth RS is not identified, the terminal device 130 may not need to monitor the PDCCH candidates or may not need to decode DCI associated with the PDCCH candidates. In some embodiments, when at least one of the fifth RS and the sixth RS is not identified, the terminal device 130 may determine or decide not to monitor the PDCCH candidates, or the terminal device 130 may discard or abandon or ignore the PDCCH candidates. In some embodiments, when at least one of the fifth RS and the sixth RS is not identified, the terminal device 130 may determine or decide not to decode DCI associated with the PDCCH candidates, or the terminal device 130 may discard or abandon or ignore DCI associated with the PDCCH candidates.

[0085] In some embodiments, the PDCCH candidate may be monitored from a certain point in time or after that 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 that point in time or after that point in time. In some embodiments, the point in time is 28 symbols starting from the last symbol of the first PDCCH reception within the search set provided by recoverySeaerchSpaceId, where a DCI having a cyclic redundancy check (CRC) scrambled by a cell radio network temporary identifier (C-RNTI) or a modulation and coding scheme cell radio network temporary identifier (MCS-C-RNTI) by the terminal device is detected. In some embodiments, the point in time is 28 symbols starting from the last symbol of a PDCCH reception having a DCI that schedules a PUSCH transmission having the same hybrid automatic repeat request (HARQ) process number as the transmission of the first PUSCH and has a toggled new data indicator (NDI) field value.

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

[0087] Figure 4 is a flowchart of an exemplary method 400 for both an SFN scheme and a non-SFN scheme according to some embodiments of the present disclosure. The method 400 can be implemented in the terminal device 130 as shown in FIG. 1.

[0088] As shown in FIG. 4, at block 410, the terminal device 130 receives at least one setting regarding 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 (RSs) for beam failure detection (BFD). At block 420, in response to detecting a beam failure by evaluating the radio link quality on at least one RS included in the at least one set of RSs, 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 two TCI states or to have a CORESET that is configured or activated. In some embodiments, the demodulation reference signal (DMRS) for PDCCH is a set of resource element groups (REGs) within a set of consecutive resource blocks in a CORESET, and is within a set of REGs associated with the same TCI state as the PDCCH (or the PDCCH candidate for which the PDCCH is monitored). In some embodiments, the terminal device may assume that the same precoding is used across a set of REGs within a set of consecutive resource blocks, where the set of REGs is associated with the same TCI state of the PDCCH (or the PDCCH candidate for which the PDCCH is monitored).

[0090] In some embodiments, the set of REGs is contiguous within a set of contiguous resource blocks. For example, within a set of contiguous RBs, if one PDCCH (or PDCCH candidate) is monitored / detected within a first set of REGs, 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 within the second set includes the set / subset of the first set of REGs.

[0091] In some embodiments, the terminal device sequences according to the following formula

Number

Number

Number

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

[0093] In some embodiments, the set of REGs is all REGs associated with the same TCI state within a set of consecutive resource blocks. For example, within a set of consecutive RBs, if one PDCCH (candidate) is monitored / detected within a first set of REGs, 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, according to the following formula, the sequence

Number

Number

Number

[0095] In some embodiments, for both interleaved mapping and non - interleaved mapping, the terminal device may assume as follows. - When the higher layer parameter precoderGranularity is equal to sameAsREG - bundle, the same precoding is used within a REG bundle. - When the higher 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 within a set of consecutive resource blocks within the CORESET, and there are no resource elements within the CORESET that overlap with the SSB or LTE cell - specific reference signal indicated by the higher layer parameter lte - CRS - ToMatchAround or additionalLTE - CRS - ToMatchAroundList.

[0096] In some embodiments, the terminal device comprises circuitry that receives at least one configuration regarding a first control resource set (CORESET) and a second CORESET, where the at least one configuration indicates that the first CORESET is associated with a first set of reference signals (RS) for beam failure detection (BFD), and the second CORESET is associated with 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 detection of a beam failure by evaluating the 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 circuitry 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 circuitry configured to invalidate 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 detecting a beam failure 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 includes circuitry configured to monitor at least one of the first PDCCH candidate and the second PDCCH candidate in response to detecting no beam failure for any of the first set of RSs and the second set of RSs, and to monitor either the first PDCCH candidate or the second PDCCH candidate in response to detecting a beam failure for at least one of the first set of RSs and the second set of RSs.

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

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

[0103] In some embodiments, the second CORESET is associated with a second set of RSs, the terminal device comprises a circuit, and the circuit is configured to decode 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 detecting no beam failure for either the first set of RSs or the second set of RSs, and to decode DCI associated with one of the first PDCCH candidate and the second PDCCH candidate in response to detecting a beam failure for at least one of the first set of RSs and the second set of RSs.

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

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

[0106] In some embodiments, the at least one configuration 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 a second set of RSs, the terminal device comprises a circuit, and the circuit is 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, media access control (MAC) control element (CE), and DCI.

[0108] In some embodiments, the second CORESET is associated with a first set of the RSs, and the terminal device includes a circuit configured to receive at least one RS included in the first set of the 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 includes a circuit configured to determine the first set of the RSs based on a third set of RSs indicated within a first transmission configuration indicator (TCI) state for the first CORESET, or the third set of RSs indicated within the first TCI state for the first CORESET and a fourth set of RSs indicated within a second TCI state for the second CORESET, and to determine the second set of the RSs based on the fourth set of RSs indicated within the second TCI state for the second CORESET.

[0110] In some embodiments, the second CORESET is associated with a first set of the RSs including a first RS and / or a second RS, and the terminal device includes a circuit configured to determine the first RS based on a third set of RSs indicated within a first transmission configuration indicator (TCI) state for the first CORESET, or the third set of RSs indicated within the first TCI state for the first CORESET and a fourth set of RSs indicated within a second TCI state for the second CORESET, and to determine the second RS based on the fourth set of RSs indicated within the second TCI state for the second CORESET.

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

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

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

[0114] In some embodiments, the terminal device comprises a circuit, and the circuit is configured to monitor the first PDCCH candidate by associating a first set of antenna port quasi - collocation (QCL) parameters with the third RS in response to the third RS being identified and the second beam failure not being detected, to monitor the second PDCCH candidate using a second TCI state for the second CORESET, to monitor the second PDCCH candidate by associating a second set of antenna port QCL parameters with the fourth RS in response to the fourth RS being identified and the first beam failure not being detected, 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, and in response to the detection of the first beam obstruction and the second beam obstruction, the circuit identifies the third RS and, in response to the non-identification of the fourth RS, monitors the first PDCCH candidate by associating a first set of antenna port QCL parameters with the third RS without monitoring the second PDCCH candidate. In response to the identification of the fourth RS and the non-identification of the third RS, the circuit is configured to monitor the second PDCCH candidate 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, and the circuit is configured to invalidate the monitoring of the first PDCCH candidate and the second PDCCH candidate in response to the detection of at least one of the first beam obstruction and the second beam obstruction and the non-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 the RSs, the terminal device includes a circuit, and the circuit identifies the fifth RS and / or the sixth RS from a seventh set of the RSs in response to the detection of a beam obstruction for at least one RS in the first set of the RSs. In response to the identification of the fifth RS, the circuit is configured to monitor the first PDCCH candidate by associating a third set of antenna port QCL parameters with the fifth RS. In response to the identification of the sixth RS, the circuit is configured to monitor the second PDCCH candidate by associating a fourth set of antenna port QCL parameters with the sixth RS.

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

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

[0120] In some embodiments, the terminal device includes a circuit, and the circuit is configured to perform at least one of: decoding DCI associated with the first PDCCH candidate using a first TCI state for the first CORESET in response to the fourth RS being identified and the first beam obstruction not being detected; associating the second set of antenna port QCL parameters with the fourth RS to decode DCI associated with the second PDCCH candidate; and decoding 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, and the circuit is configured to: in response to the first beam obstruction and the second beam obstruction being detected, identify the third RS and, in response to the fourth RS not being identified, associate the first set of antenna port QCL parameters with the third RS to decode DCI associated with the first PDCCH candidate without decoding at least one of DCI associated with the second PDCCH candidate and DCI associated with a combination of the first PDCCH candidate and the second PDCCH candidate; and in response to the third RS not being identified and the fourth RS being identified, associate the second set of antenna port QCL parameters with the third RS to decode DCI associated with the second PDCCH candidate without decoding at least one of DCI associated with the first PDCCH candidate and DCI associated with a combination of the first PDCCH candidate and the second PDCCH candidate.

[0122] In some embodiments, the terminal device includes a circuit, and the circuit is configured to invalidate decoding of at least one of DCI associated with the first PDCCH candidate, DCI associated with the second PDCCH candidate, and DCI associated with a combination of the first PDCCH candidate and the second PDCCH candidate in response to detection of at least one of the first beam obstruction and the second beam obstruction and failure to identify at least one of the third RS and the fourth RS.

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

[0124] In some embodiments, the terminal device includes a circuit, and the circuit, in response to the fifth RS being identified and the sixth RS not being identified, associates 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, thereby decoding the DCI associated with the first PDCCH candidate; in response to the fifth RS not being identified and the sixth RS being identified, associates the fourth set of antenna port QCL parameters 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, thereby decoding the DCI associated with the second PDCCH candidate; and is configured to invalidate decoding of 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 response to at least one of the fifth RS and the sixth RS not being identified.

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

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

[0127] In some embodiments, the terminal device comprises a circuit, the circuit is configured to decode downlink control information (DCI) associated with the PDCCH candidates.

[0128] In some embodiments, the terminal device comprises a circuit, the circuit is configured to invalidate decoding of DCI associated with the PDCCH candidates in response to detection of a beam failure for at least one of the 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 the CORESET via at least one of a MAC control element (CE) and DCI.

[0130] In some embodiments, the terminal device comprises a circuit, the circuit is configured to monitor PDCCH candidates having the first TCI state and the second TCI state in response to no beam failure being detected for any of the plurality of sets of RSs, and to monitor PDCCH candidates having one of the first TCI state and the second TCI state in response to detection of the beam failure for at least one of the plurality of sets of RSs.

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

[0132] In some embodiments, the plurality of sets of the RSs include a third set of RSs including a first RS and a second RS, the terminal device includes a circuit, and the circuit is configured to monitor PDCCH candidates using the first TCI state in response to detecting a beam failure for the second RS, and to monitor PDCCH candidates using the second TCI state in response to detecting a beam failure for the first RS.

[0133] In some embodiments, the plurality of sets of the RSs include a first set of RSs and a second set of RSs, the terminal device includes a circuit, and the circuit is configured to decode DCI associated with PDCCH candidates having the first TCI state and the second TCI state in response to detecting no beam failure for any of the first set of the RSs and the second set of the RSs, and to decode DCI associated with PDCCH candidates having one of the first TCI state and the second TCI state in response to detecting a beam failure for at least one of the first set of the RSs and the second set of the RSs.

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

[0135] In some embodiments, the plurality of sets of the RSs includes a third set of RSs including a first RS and a second RS, the terminal device includes a circuit, and the circuit is configured to decode DCI associated with a PDCCH candidate using the first TCI state in response to detecting a beam failure for the second RS, and to decode DCI associated with a PDCCH candidate using the second TCI state in response to detecting a beam failure for the first RS.

[0136] In some embodiments, the plurality of sets of the RSs includes a first set of RSs and a second set of RSs, the terminal device includes a circuit, and the circuit is configured to receive at least one of the first set of the RSs and the second set of the RSs via at least one of RRC signaling, MAC CE, and DCI.

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

[0138] In some embodiments, the plurality of sets of the RSs includes a third set of RSs including a first RS and a second RS, the terminal device includes a circuit, and the circuit determines the first RS based on a fourth set of RSs indicated within a first TCI state for the CORESET, determines the second RS based on a fifth set of RSs indicated within a second TCI state for the CORESET, and is configured to 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 configuration may further indicate that the CORESET is associated with a value of an identity (ID).

[0140] In some embodiments, the plurality of sets of the RSs includes a first set of RSs and a second set of RSs, the terminal device includes a circuit, and the circuit is configured to identify a third RS from a sixth set of RSs in response to detecting a first beam obstruction for the first set of RSs, and identify a fourth RS from the sixth set of RSs or a seventh set of RSs in response to detecting a second beam obstruction for the second set of RSs.

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

[0142] In some embodiments, the terminal device includes a circuit, and the circuit is configured to monitor the PDCCH candidates or decode the DCI associated with the PDCCH candidates by associating a first set of antenna port quasi - co - location (QCL) parameters with the third RS in response to the third RS being recognized and the second beam obstruction not being detected, and / or to monitor the PDCCH candidates or decode the DCI associated with the PDCCH candidates by using the second TCI state for the CORESET, and to monitor the PDCCH candidates or decode the DCI associated with the PDCCH candidates by using the first TCI state for the CORESET in response to the fourth RS being identified and the first beam obstruction not being detected, and / or to monitor the PDCCH candidates or decode the DCI associated with the PDCCH candidates by associating a second set of antenna port QCL parameters with the fourth RS.

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

[0144] In some embodiments, the terminal device comprises a circuit, and the circuit is configured to invalidate the monitoring of the first PDCCH candidate and / or invalidate the decoding of the DCI associated with the PDCCH candidate in response to at least one of the first beam obstruction and the second beam obstruction being detected and at least one of the third RS and the fourth RS not being identified.

[0145] In some embodiments, the plurality of sets of the RS includes a third set of the RS, and the terminal device comprises a circuit, and the circuit is configured to identify a fifth RS and / or a sixth RS from an eighth set of the RS in response to a beam obstruction being detected for at least one RS of the third set of the RS, and to 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 fifth RS being identified, and to 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 sixth RS being identified.

[0146] In some embodiments, the terminal device comprises a circuit, and the circuit is 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 in response to the fifth RS being identified and the sixth RS not being identified, and 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 in response to the fifth RS not being identified and the sixth RS being identified, and to invalidate the monitoring of the PDCCH candidate or invalidate the decoding of the DCI associated with the PDCCH candidate in response to at least one of the fifth RS and the sixth RS not being 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 includes a circuit, and the circuit is configured to decode DCI associated with the PDCCH candidate from or after the point in time, where the point in time is indicated by a slot or a symbol.

[0148] In some embodiments, a terminal device includes a circuit, and the circuit receives at least one setting regarding 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 (RSs) for beam failure detection (BFD), and in response to detecting a beam failure by evaluating the radio link quality on at least one RS included in the at least one set of RSs, is configured not to monitor any PDCCH candidates within the at least one CORESET.

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

[0150] As shown, apparatus 500 includes a processor 510, a memory 520 coupled to the processor 510, a suitable transmitter (TX) and receiver (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 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 nodes referred to herein can 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, a 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] Assume that program 530 includes program instructions that, when executed by the associated processor 510 as described herein with reference to FIGS. 1 through 4, enable apparatus 500 to operate in accordance with embodiments of the present disclosure. Embodiments of the present text can be implemented by computer software executable by the processor 510 of apparatus 500, or by hardware, or by a combination of software and hardware. The processor 510 can be configured to implement various embodiments of the present disclosure. Further, the combination of the processor 510 and the memory 520 can form processing means 550 suitable for implementing various embodiments of the present disclosure.

[0152] Memory 520 can be of any type suitable for a local technology network and, by way of non-limiting example, can be implemented using any suitable data storage technology such as a non-transitory computer-readable storage medium, a semiconductor-based memory device, a magnetic memory device and system, an optical memory device and system, a fixed memory, and a removable memory. Although only one memory 520 is shown within device 500, there may be several physically different memory modules within device 500. Processor 510 can be of any type suitable for a local technology network and, by way of non-limiting example, can include one or more of a general-purpose computer, a dedicated computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor architecture. Device 500 can have a plurality of processors, for example, an application-specific integrated circuit chip that is temporally dependent on a clock that synchronizes the main processor.

[0153] Overall, the various embodiments of the present disclosure can be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software executable by a controller, a microprocessor, or other computing device. Although the various aspects of the embodiments of the present disclosure are illustrated and described using block diagrams, flowcharts, or some other pictorial representation, it should be understood that the blocks, apparatus, systems, techniques, or methods described herein can be implemented, by way of non-limiting example, in hardware, software, firmware, dedicated circuitry or logic, general-purpose hardware or a controller or other computing device, or any combination thereof.

[0154] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. The computer program product includes computer-executable instructions, such as instructions included in program modules, that are executed within an apparatus on a target physical processor or virtual processor to perform the processes or methods described above with reference to FIGS. 2, 3, and / or 4. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform particular tasks or implement particular abstract data types. In various embodiments, the functions of the program modules can be combined or divided among the program modules as needed. The machine-executable instructions of the program modules can be executed within a local or distributed apparatus. In a distributed apparatus, the program modules can be located in both local and remote storage media.

[0155] The program code for performing the methods of the present disclosure may be written in any combination of one or more programming languages. These program codes are 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 codes implement the functions / operations specified in the flowchart and / or block diagram. The program code may be executed entirely on the machine, partially on the machine, as an independent software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0156] The above program code can be implemented on a machine-readable medium, which may be any tangible medium that can be used by or associated with an instruction execution system, apparatus, or device and can contain or store a program. The machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing media. More specific examples of machine-readable storage media may include electrical connections having 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 disc read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0157] Note that although the operations have been described in a particular order, it should be understood that such operations need not be performed in the particular order shown or in a sequential order, nor is it required that all of the operations described be performed, in order to obtain the desired results. In some cases, multitasking and parallel processing may be advantageous. Similarly, while some specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the present 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 combined and implemented in a single embodiment. Conversely, various features described in the context of a single embodiment may be implemented separately in multiple embodiments or in any suitable subcombination.

[0158] Although the present disclosure has been described in language specific to structural features and / or methodological acts, it is to be understood that the disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as exemplary forms of implementing the claims.

Claims

1. means for receiving a configuration indicating a first control resource set (CORESET) associated with two transmission configuration indicator (TCI) states for physical downlink control channel (PDCCH) reception; means for evaluating a downlink radio link quality based on a set of reference signals (RSs) determined based on a set of RSs associated with both of the two TCI states to detect beam failure; A terminal device comprising:

2. A single frequency network (SFN) scheme for PDCCH is configured for the terminal device. The terminal device according to claim 1 .

3. The first PDCCH candidate for the second CORESET and the second PDCCH candidate for the third CORESET are counted as three PDCCH candidates for the PDCCH reception. The terminal device according to claim 1 or 2.

4. means for transmitting a configuration indicating a first control resource set (CORESET) associated with two transmission configuration indicator (TCI) states for physical downlink control channel (PDCCH) reception; means for determining a set of reference signals (RSs) for evaluating a downlink radio link quality to detect beam failure based on a set of RSs associated with both of the two TCI states; A network device comprising:

5. A single frequency network (SFN) scheme for PDCCH has been established. The network device according to claim 4.

6. The first PDCCH candidate for the second CORESET and the second PDCCH candidate for the third CORESET are counted as three PDCCH candidates for the PDCCH reception.

6. A network device according to claim 4 or 5.

7. receiving a configuration indicating a first control resource set (CORESET) associated with two transmission configuration indicator (TCI) states for physical downlink control channel (PDCCH) reception; evaluating a downlink radio link quality based on a set of reference signals (RSs) determined based on a set of RSs associated with both of the two TCI states to detect beam failure; A method performed by a terminal device, comprising:

8. A single frequency network (SFN) scheme for PDCCH is configured for the terminal device. The method according to claim 7.

9. The first PDCCH candidate for the second CORESET and the second PDCCH candidate for the third CORESET are counted as three PDCCH candidates for the PDCCH reception.

9. The method according to claim 7 or 8.

10. transmitting a configuration indicating a first control resource set (CORESET) associated with two transmission configuration indicator (TCI) states for physical downlink control channel (PDCCH) reception; determining a set of reference signals (RSs) for evaluating a downlink radio link quality to detect beam failure based on a set of reference signals (RSs) associated with both of the two TCI states; 23. A method performed by a network device, comprising:

11. A single frequency network (SFN) scheme for PDCCH has been established. The method of claim 10.

12. The first PDCCH candidate for the second CORESET and the second PDCCH candidate for the third CORESET are counted as three PDCCH candidates for the PDCCH reception.

12. The method according to claim 10 or 11.

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