Core set selection with different QCL-TYPED for M-TRP PDCCH repetitions

Abstract

Core set selection with different QCL-TYPED for M-TRP PDCCH repetitions. [Solution] According to an exemplary embodiment of the present invention, there is at least a method and apparatus that performs the steps of determining, by a network device of a communication network, to monitor physical downlink control channel candidates of two or more control resource sets of the communication network, wherein the two or more control resource sets use different QCL-TypeDs, and selecting at least two control resource sets of the two or more control resource sets having different QCL-TypeDs for monitoring at least two of the physical downlink control channel candidates.

Description

[Technical Field]

[0001] The teachings of exemplary embodiments of the present invention relate generally to determining a CORESET for monitoring physical resources, and more specifically to determining a CORESET with different QCL-Type D using PDCCH repetitions for monitoring physical resources. [Background technology]

[0002] This section is intended to provide a background or context for the claimed invention. The description herein may include concepts that could be pursued, but not necessarily those that have been previously conceived or pursued. Thus, unless stated otherwise herein, nothing in this section is intended to be prior art to the present specification and claims, and is not admitted to be prior art by virtue of being described in this section.

[0003] Certain abbreviations that may be found in the specification and / or figures are defined herein as follows: AL: Aggregation Level BD: Blind Decoding CORESET: Control Resource Set CSS: Common Search Space DCI: Downlink Control Information gNB: 5G Node B MAC CE: MAC Control Element M-TRP: Multi Transmission and Reception Point OFDM: Orthogonal Frequency-Division Multiplexing PDCCH: Physical Downlink Control Channel PDSCH: Physical Downlink Shared Channel QCL: Quasi Co-Location SS: Search Space SSSet: Search Space Set TCI: Transmission Configuration Indicator TRP: Transmission and Reception Point UE: User Equipment USS: UE-Specific Search Space

[0004] As of the time of this application, as demand for wireless access continues to increase, there is a need for further improvements in various aspects of communication systems, including improvements in data rates, latency, reliability, and / or mobility of wireless communications in cellular wireless communication systems such as 5G NR, as related to the control resource set selection operations of such communications.

[0005] Exemplary embodiments of the present invention serve to further improve such operations. Summary of the Invention

[0006] In one aspect of the present invention, there is an apparatus that includes at least one processor and at least one non-transitory memory containing computer program code, the at least one non-transitory memory and the computer program code, together with the at least one processor, configured to cause the apparatus to at least perform the steps of: determining to monitor physical downlink control channel candidates of two or more control resource sets of a communication network, wherein the two or more control resource sets use different QCL-Type D; and selecting at least two control resource sets with different QCL-Type D from the two or more control resource sets for monitoring at least two of the physical downlink control channel candidates.

[0007] In another example aspect of the present invention, there is a method including: determining, by a network device of a communications network, to monitor physical downlink control channel candidates of two or more control resource sets of the communications network, wherein the two or more control resource sets use different QCL-Type Ds; and selecting, from the two or more control resource sets, at least two control resource sets having different QCL-Type Ds for monitoring at least two of the physical downlink control channel candidates.

[0008] Further exemplary embodiments include apparatus and methods including the apparatus and method of the previous paragraph, wherein the selecting includes selecting at least two control resource sets having different QCL-TypeDs associated with a physical downlink control channel repetition, the two or more control resource sets including at least a first control resource set and at least one other control resource set, and the selecting further includes selecting the first control resource set and the at least one other control resource set of the two or more control resource sets for monitoring based on a link between the first control resource set and the at least one other control resource set, wherein the link between the first control resource set and the at least one other control resource set comprises linking search space sets of the first control resource set and the at least one other control resource set. the monitoring step includes monitoring physical downlink control channel candidates of the at least one other control resource set associated with a second QCL-TypeD, and the monitoring is extended to monitor any control resource set of the at least one other control resource set having the same QCL-TypeD as the second QCL-TypeD, and the monitoring is not performed on control resource sets among the two or more control resource sets that are not linked with the first control resource set, and selecting, based on the existence of two or more control resource sets having linked search space sets, includes selecting one with the lowest or highest index, and a priority is given for monitoring control resource sets that allow repetition of the physical downlink control channel that is not based on at least one of an index of a common search space or a UE-specific search space, and based on multiple cells being configured to have repetition of the physical downlink control channel, selecting is composed of linked control resource sets in cells with one of the lower or higher indexes.The monitoring comprises monitoring different QCL-TypeDs from different control resource sets of the two or more control resource sets without considering whether the different control resource sets are linked to each other. The selecting includes selecting a first control resource set having a first QCL-Type D and selecting a second control resource set having a different QCL-Type D based on a control resource set not associated with the first QCL-Type D, where the selecting uses a restriction to support at least one of physical downlink control channel repetition or multi-transmit / receive point operation, and / or where the restriction takes into account control resource sets having different core set pool indices associated with a control resource set group defined to support multiple downlink control information modes.

[0009] In another exemplary aspect of the present invention, a non-transitory computer-readable medium is provided that stores program code, the program code being executed by at least one processor to perform at least the method described in the paragraph above.

[0010] In another embodiment of the present invention, there is provided an apparatus including: means for determining to monitor physical downlink control channel candidates of two or more control resource sets of a communication network, wherein the two or more control resource sets use different QCL-Type Ds; and means for selecting at least two control resource sets from the two or more control resource sets, the control resource sets having different QCL-Type Ds, for monitoring at least two of the physical downlink control channel candidates.

[0011] According to the exemplary embodiment described in the above paragraph, at least the means for determining and selecting comprises a network interface and computer program code stored on a computer-readable medium and executed by at least one processor.

[0012] Another embodiment of the present invention provides a communication system including a network side device and a user equipment side device that perform the above-described operations. [Brief explanation of the drawings]

[0013] The above and other aspects, features, and advantages of various embodiments of the present disclosure will become more fully apparent from the following detailed description taken in conjunction with the accompanying drawings, which are illustrated to facilitate an understanding of embodiments of the present disclosure and are not necessarily drawn to scale.

[0014] [Figure 1] FIG. 1 shows the procedure for generating a PDCCH from DCI.

[0015] [Figure 2] FIG. 2 illustrates an example of monitoring overlapping CORESETs in different QCL-Type D with linkage-based PDCCH repetition according to an exemplary embodiment of the present invention.

[0016] [Figure 3] FIG. 3 illustrates an example of monitoring overlapping CORESETs with different QCL-Type D in PDCCH repetitions based on SS sets linked between other SS sets, according to an exemplary embodiment of the present invention.

[0017] [Figure 4] FIG. 4 illustrates an example of PDCCH repetition and monitoring of overlapping CORESETs with different QCL-Type Ds whose CSS / USS IDs are not associated with the QCL-Type D of the first (selected) CORESET, according to an exemplary embodiment of the present invention.

[0018] [Figure 5]FIG. 5 is a flow diagram illustrating the operation of a UE considering the two discussed options for PDCCH repetition with multiple overlapping CORESETs with different QCL-Type D, in accordance with an exemplary embodiment of the present invention.

[0019] [Figure 6] FIG. 6 is a high-level block diagram of various devices that may be used in implementing various aspects of the present invention.

[0020] [Figure 7] FIG. 7 illustrates a method according to an exemplary embodiment of the present invention that may be performed by an apparatus. DETAILED DESCRIPTION OF THE INVENTION

[0021] In an exemplary embodiment of the present invention, there is at least a method and apparatus for performing determining CORESETs with different QCL-Type D using PDCCH repetitions to monitor physical resources.

[0022] Exemplary embodiments of the present invention may be relevant to 3GPP® New Radio (NR) physical layer designs, and more specifically focus on facilitating concatenation of Physical Downlink Control Channel (PDCCH) candidate Search Space Sets (SSSets) when repetition and beam diversity for PDCCH transmissions are applied.

[0023] From a physical layer perspective, NR data and signaling messages are transmitted over downlink (DL) and uplink (UL) physical channels. Among these channels, the PDCCH plays a central role, for example, in DL scheduling assignments and UL scheduling grants. The NR PDCCH carries downlink control information (DCI). DCI includes scheduling information for UL or DL ​​data channels and other control information for a UE or a group of UEs.

[0024] [PDCCH:]

[0025] Channel coding and downlink control information (DCI) construction.

[0026] The PDCCH generation procedure is shown in Figure 1. If the DCI format size is less than 12 bits, zero padding bits are added until the payload size equals 12 bits. A 24-bit cyclic redundancy check (CRC) is calculated for the DCI payload bits and appended to the payload. This CRC allows the UE to detect errors in the decoded DCI payload bits. After the CRC is appended, the last 16 CRC bits are masked with a corresponding identifier called the Radio Network Temporary Identifier (RNTI). Using the RNTI mask, the UE can detect DCI in unicast data and distinguish between DCI sets with different intended purposes that have the same payload size. The CRC-attached bits are then interleaved, and the CRC bits are distributed among the information bits. The interleaver supports an input size of up to 164 bits. This means that DCI without a CRC can have a maximum of 140 payload bits. These bits are then encoded by a polar encoder to protect the DCI from errors during transmission. The encoder output is processed using a sub-block interleaver and rate-matched to fit the allocated payload resource elements (REs) of the DCI.

[0027] Each DCI payload bit is individually scrambled by a scrambling sequence generated from a length-31 Gold sequence. The scrambling sequence is initialized by the cell's physical layer cell ID or a UE-specific scrambling ID and a UE-specific cell RNTI (C-RNTI). The scrambled DCI bit sequence is then modulated using Quadrature Phase Shift Keying (QPSK), and the complex-valued modulation symbols are mapped to physical resources in units called Control Channel Elements (CCEs). Each CCE consists of six resource element groups (REGs), where a REG is defined as one PRB of one OFDM symbol containing nine REs for the PDCCH payload and three DMRS REs. One, two, four, eight, or 16 CCEs can be allocated to each DCI, and the number of CCEs for a DCI is referred to as the aggregation level (AL). For QPSK modulation, a CCE contains 54 payload REs, allowing it to carry 108 bits. Therefore, the output size of the rate matching block should be L-108, where L is the associated AL. Based on the channel environment and available resources, the gNB can adaptively select a suitable AL for DCI and adjust the code rate.

[0028] [Control Resource Sets (CORESETs)]

[0029] DCI with ALL L is mapped to physical resources within a given BWP, and necessary parameters such as frequency and time domain resources, scrambling sequence identity of DMRS for PDCCH, etc. are configured in the UE via a control resource set (CORESET). A UE can configure up to three CORESETs in Rel15 and up to five CORESETs in Rel16 (for multi-DCI M-TRP operation) for each of up to four BWPs in the serving cell. In general, a CORESET consists of 6 PRBs on a 6PRB frequency grid and 1, 2, or 3 consecutive OFDM symbols in the time domain.

[0030] The DCI of an ALL L consists of L consecutive CCEs, and the CCEs are mapped onto multiple REGs within a CORESET. NR supports distributed and localized resource allocation for DCI within a CORESET. This is achieved by configuring interleaved or non-interleaved CCE-to-REG mapping for each CORESET. In the case of interleaved CCE-to-REG mapping, the REG bundles that make up the CCEs of the PDCCH are distributed in the frequency domain per REG bundle. A REG bundle is an indivisible collection of resources consisting of adjacent REGs. A REG bundle spans all OFDM symbols in a given CORESET. Once the REG corresponding to the PDCCH is determined, the modulated symbols of the PDCCH are mapped to the REs of the determined REG first in the frequency domain and second in the time domain, i.e., in increasing order of RE index and symbol index, respectively.

[0031] [PDCCH Monitoring - Search Space Sets (SSSets)]

[0032] The UE performs blind decoding on a set of PDCCH candidates. The PDCCH candidates to monitor are configured in the UE by a search space (SS) set. There are two types of SS sets: common SS (CSS) sets (monitored jointly by a group of UEs in a cell) and UE-specific SS (USS) sets (monitored by individual UEs). A UE can configure up to 10 SS sets for up to four BWPs in its serving cell. In general, the SS set configuration provides the UE with the type of SS set (CSS set or USS set), the DCI format to monitor, the monitoring occasion, and the number of PDCCH candidates for each AL in the SS set.

[0033] The SS set with index s is uniquely associated with the CORESET with index p. The UE determines the slots for monitoring the SS set with index based on the higher layer parameters of periodicity k, offset o, and duration d, where periodicity k and offset o provide the starting slot and duration d provides the number of consecutive slots the SS set is monitored for, starting from the slot identified by k and o.

[0034] [PDCCH Repetition Framework]

[0035] As agreed in RAN1#103-e, Alt3 (two SS sets associated with the corresponding CORESET) is supported for PDCCH repetition and reliability enhancement with non-SFN methods and Option 2+Case 1.

[0036] Here, Alt3 refers to considering two (or more) SS sets corresponding to different CORESETs, Option 2 refers to using the same DCI that goes into the encoding process and repeating one with two different PDCCH candidates (one per TCI state), and Case 1 refers to an explicit link between the two PDCCHs.

[0037] In Rel-17 M-TRP PDCCH repetition, two PDCCH candidates (transmitted via different TRPs or, more generally, different TCI states) are associated with each other. The UE knows the association or connection between the two PDCCH candidates before attempting blind decoding, allowing the UE to perform selective or soft combined decoding without ambiguity. These associated PDCCH candidates are configured in different SS sets associated with corresponding CORESETs (referred to in the operating assumptions disclosed herein).

[0038] It should be noted that to configure the QCL, the TCI-State is a parameter that can be used to configure a quasi-co-location relationship between one or two downlink reference signals and the DMRS of a PDSCH port.

[0039] It was also agreed that the linking of SS sets is based on the RRC configuration. When the link is established for the UE, the gNB must also comply with certain RRC configuration restrictions, such as that the two SS sets have the same periodicity, the same DCI format to monitor, the same number of candidates for each aggregation level, and so on. Also, the two SS sets are associated with different CORESETs with corresponding TCI states. Note that the TCI can be a field of the DCI used to indicate quasi-co-location of PDSCH antennas.

[0040] Regarding monitoring opportunities, it has also been agreed that each monitoring opportunity in the first SS set is linked with a monitoring opportunity in the second SS set. Within two linked monitoring opportunities, PDCCH candidates with the same aggregation level and the same candidate index are linked to each other.

[0041] More importantly, the benefits of PDCCH repetition, mainly reliability and robustness, are only obtained if both PDCCH repetitions are decoded at the UE with selective decoding or soft-combined decoding approaches.

[0042] [PDCCH reception priority rule allocation]

[0043] Rel-15 / Rel-16 defines a priority rule for PDCCH reception when QCL-TypeD collision occurs, which is based on the type of SS or CORESET ID. For example, in Rel-15 / Rel-16, QCL-TypeD is defined as a QCL type associated with one or more spatial reception parameters. When different QCL-TypeDs are mapped to different beams, PDCCH reception with CORESET overlap cannot monitor both because it is assumed that single-panel and single-beam monitoring is possible. Therefore, the other PDCCH candidate in this case is deleted.

[0044] Note that control resource sets (CORESETs) are defined for PDCCH reception. These CORESETs collect physical layer parameters related to PDCCH detection, such as the number of OFDM symbols (1, 2, or 3) and the configured frequency resources. Therefore, each CORESET contains PDCCH candidates and configures the TCI state. When a UE receives a PDCCH, the PDCCH DM-RS is QCL'd with the source RS indicated by the TCI state of the CORESET to which the PDCCH belongs. Furthermore, a UE can configure multiple CORESETs. For example, a CORESET can be configured for each transmission point or beam, with each configured with a different unique TCI state.

[0045] The SSBs are considered as the source RS for the TCI state used for the PDCCH. Therefore, each SSB used within a cell has its own TCI state configured, and when the UE moves within the cell, MAC-CE signaling is used to update the configured CORESET TCI state. Since there is one PSS / SSS / PBCH per cell in LTE, whereas there are multiple SSBs in NR, the reconfiguration of the active TCI state of the CORESET by the MAC-CE can be considered as an intra-cell handover command, except that there is no higher layer (Layer 3) involved.

[0046] According to the 3GPP specifications at the time of this application, the rules for prioritizing overlapping CORESET PDCCH candidates when the characteristics of QCL-TypeD are different, etc., are as follows: "UE is - configured for single-cell or carrier aggregation operation in the same frequency band, - In one or more active DL BWP(s) of a cell, the QCL-TypeD property is Multiple CORESETs, same or different In case of redundantly monitoring PDCCH candidates, the UE may monitor the PDCCH candidates on the active DL BWP of one or more cells. Same QCL-Type D characteristics as CORESET Among multiple CORESETs having the same number of PDCCHs, only the PDCCH in the CORESET and the PDCCH in other CORESETs are monitored. - If CORESET exists, it corresponds to the CSS set with the lowest index in the cell that contains CSS, otherwise it corresponds to the USS set with the lowest index in the cell that contains CSS, - The index of the lowest USS set is determined over all USS sets that have at least one PDCCH candidate in the overlapping PDCCH monitoring scenario.

[0047] Therefore, under the existing QCL-TypeD prioritization rules between CORESETs, only one QCL-TypeD is monitored, which essentially excludes repetition of FR2 FDM (with symbols overlapping only in the time domain) PDCCH, even for UEs that support simultaneous reception of two beams.

[0048] [Current 3GPP situation]

[0049] 3GPP Rel17 M-TRP URLLC Enhancement WI targets support for multi-TRP operation, which allows UEs to receive PDCCH repetitions with different QCL-Type D. In this context, the following agreements were made in RAN1 #104-bis-e to support PDCCH repetitions in FR2 with FDM scheme: Agreement For a UE that supports reception via two different beams, it supports specifying the following two QCL-TypeD properties for multiple overlapping CORESETs: ● FFS: How to strengthen the priority rules when existing QCL-TypeD CORESETs overlap. ● NOTE: The main purpose of this extension for the purposes of this Sub-AI is to support time-overlapping PDCCH repetition in FR2.

[0050] To allow repetition of FDM PDCCH, we consider monitoring multiple overlapping CORESET / PDCCH candidates with different QCL-TypeD.

[0051] There are limitations to monitoring two PDCCH candidates from different TRPs when their CORESETs overlap and their QCL-TypeD properties are different. Certain rules are applied to prioritize the monitoring of PDCCH candidates, as shown below. "If it's UE - configured for single cell operation or carrier aggregation operation in the same frequency band; and - on an active DL BWP of one or more cells, Same or different QCL-TypeD properties In multiple CORESETs with the same PDCCH, PDCCH candidates are monitored in overlapping PDCCH monitoring scenes. The UE may use CORESET and Same QCL-TypeD properties Among multiple CORESETs having the same PDCCH, only the PDCCH in the CORESET and in other CORESETs are monitored. - If CORESET exists, it corresponds to the CSS set with the lowest index in the cell containing CSS, otherwise it corresponds to the USS set with the lowest index in the cell with the lowest index. The index of the lowest USS set is determined over all USS sets that have at least one PDCCH candidate in the overlapping PDCCH monitoring scenario.

[0052] If the same rule is applied when PDCCH repetition is allowed in overlapping CORESETs, the second PDCCH candidate will not be monitored. Therefore, using the existing rule, the second linked PDCCH candidate will not be considered. Therefore, To enable PDCCH repetition taking into account overlapping CORESETs ,priority rules need to be strengthened.

[0053] In summary, it is required to specify CORESET selection using different QCL-Type D when a UE receives two different beams, and to explain how to support PDCCH repetition for a UE that supports reception of different QCL-Type D.

[0054] The details of the operation of the NR PDCCH are summarized here.

[0055] Furthermore, to drive a CORESET from a monitor, one way is to drive the CORESET corresponding to the CSS with the lowest index in the cell or the lowest index containing the CSS, thus linking it to the linked CORESET being monitored.

[0056] However, with cutting-edge technology, Monitor overlapping CORESETs in different QCL-TypeD when PDCCH repeat reception is applied to UEs with multiple panels It doesn't address that.

[0057] Before describing exemplary embodiments of the present invention in further detail, reference is made to Figure 6. Figure 6 illustrates a block diagram of one possible, non-limiting example system in which exemplary embodiments may be implemented.

[0058] As shown in FIG. 6, user equipment (UE) 110 is in wireless communication with a wireless network 100. The UE is a wireless, typically mobile, device capable of accessing the wireless network. The UE 110 includes one or more processors 120, one or more memories 125, and one or more transceivers 130, interconnected via one or more buses 127. Each of the one or more transceivers 130 includes a receiver (Rx) 132 and a transmitter (Tx) 133. The one or more buses 127 may be address, data, or control buses, and may include any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, optical fiber, or other optical communication devices. The one or more transceivers 130 are connected to one or more antennas 128. The one or more memories 125 include computer program code 123. The UE 110 may include a selection module 140 configured to perform exemplary embodiments of the present invention described herein. The selection module 140 may be implemented in hardware or as part of the processor and / or computer processor of the UE 110. Selection module 140, comprised of one or both portions 140-1 and / or 140-2, can be implemented in many ways. Selection module 140 may be implemented in hardware as selection module 140-1, such as implemented as part of one or more processors 120. Selection module 140-1 may also be implemented as an integrated circuit or via other hardware, such as a programmable gate array. In another example, selection module 140 may be implemented as selection module 140-2 implemented as computer program code 123 and executed by one or more processors 120. Furthermore, it should be noted that selection modules 140-1 and / or 140-2 are optional. For example, one or more memories 125 and computer program code 123, together with one or more processors 120, may be configured to cause user equipment 110 to perform one or more operations described herein.The UE 110 communicates with the gNB 170 via a wireless link 111.

[0059] The gNB 170 (NR / 5G Node B or possibly evolved NB) is a base station (e.g., in the case of LTE, Long Term Evolution) that provides access to the wireless network 100 by wireless devices such as the UE 110. The gNB 170 includes one or more processors 152, one or more memories 155, The gNB 170 includes one or more network interfaces (N / WI / F(s)) 161 and one or more transceivers 160 interconnected via one or more buses 157. Each of the one or more transceivers 160 includes a receiver Rx 162 and a transmitter Tx 163. The one or more transceivers 160 are connected to one or more antennas 158. One or more memories 155 include computer program code 153. The gNB 170 includes a selection module 150 configured to perform the exemplary embodiments of the present invention described herein. The selection module 150 is comprised of one or both components 150-1 and / or 150-2 and can be implemented in many ways. The selection module 150 may be implemented in hardware by itself or as part of the processor and / or computer program code of the gNB 170. The selection module 150-1 is implemented, for example, as part of one or more processors 152. The selection module 150-1 may also be implemented as an integrated circuit or via other hardware such as a programmable gate array. In another example, selection module 150 may be implemented as selection module 150-2 implemented as computer program code 153 and executed by one or more processors 152. Further, it should be noted that selection modules 150-1 and / or 150-2 are optional. For example, one or more memories 155 and computer program code 153 may be configured, using one or more processors 152, to cause gNB 170 to perform one or more operations described herein. One or more network interfaces 161 communicate over a network, such as via links 176 and 131. Two or more gNBs 170 can communicate using link 176, for example. Link 176 may be a network interface and may implement, for example, an X2 interface.

[0060] The bus(es) 157 may be an address bus, a data bus, or a control bus, and may include any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, optical fiber or other optical communication equipment, a wireless channel, etc. For example, one or more transceivers 160 may be implemented as a remote radio head (RRH) 195, with other elements of gNB 170 in a physically separate location from the RRH, and one or more buses 157 may be implemented in part as fiber optic cables to connect the other elements of gNB 170 to RRH 195.

[0061] While the description herein refers to a "cell" performing a function, it will be apparent that the gNB forming the cell performs the function. A cell forms part of a gNB, i.e. there may be multiple cells per gNB.

[0062] The wireless network 100 may include an NCE / MME / SGW / UDM / PCF / AMM / SMF / LMF / LMC 190, which may comprise a Network Control Element (NCE), and / or a Serving Gateway (SGW) 190, and / or an MME (Mobility Management Entity), and / or an SGW (Serving Gateway) function, and / or a User Data Management Function (UDM), and / or a PCF (Policy Control) function, and / or an AMF (Access and Mobility) function, and / or an SMF (Session Management) function, an LMF (Location Management Function), a Location Management Component (LMC), and / or an Authentication Server (AUSF) function, providing connectivity to further networks such as telephone networks and / or data communication networks (e.g., the Internet), and which is configured at the time of this application to perform any 5G and / or NR operations in addition to or instead of operations of other standards. The NCE / MME / SGW / UDM / PCF / AMM / SMF / LMF / LMC 190 may be configured to perform operations in accordance with exemplary embodiments of the present invention in any of the following communication technologies: LTE, NR, 5G, and / or any standards-based communication technologies in operation or under discussion at the time of this application.

[0063] The gNB 170 is coupled to the NCE / MME / SGW / UDM / PCF / AMM / SMF / LMF / LMC 190 via a link 131. The link 131 may be implemented, for example, as an S1 interface or an N2 interface. The NCE / MME / SGW / UDM / PCF / AMM / SMF / LMF / LMC 190 includes one or more processors 175, one or more memories 171, and one or more network interfaces (N / WI / F(s)) 180, interconnected via one or more buses 185. The one or more memories 171 include computer program code 173. The one or more memories 171 and the computer program code 173, together with the one or more processors 175, are configured to cause the NCE / MME / SGW / UDM / PCF / AMM / SMF / LMF / LMC 190 to perform one or more operations. Additionally, the NCE / MME / SGW / UDM / PCF / AMM / SMF / LMF / LMC 190, like other devices, is equipped to perform operations such as by controlling the UE 110 and / or gNB 170 for 5G and / or NR operations in addition to operations of any other standards implemented or discussed at the time of this application.

[0064] The wireless network 100 comprises hardware and software network resources. Network virtualization, which is the process of combining network functions into a single software-based management entity, a virtual network, can be implemented. Network virtualization includes platform virtualization and is often combined with resource virtualization. Network virtualization can be classified as either external, which consolidates many networks or portions of networks into a virtual unit, or internal, which provides network-like functionality to software containers on a single system. Note that the virtualized entities resulting from network virtualization are still implemented at some level using hardware such as processor 152 or 175, memory 155 and 171, and that such virtualized entities produce technical effects.

[0065] The computer-readable memories 125, 155, and 171 may be of any type suitable for the local technology environment and may be implemented using any suitable data storage technology, such as semiconductor-based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory, and removable memory. The computer-readable memories 125, 155, and 171 may be means for performing storage functions. The processors 120, 152, and 175 may be of any type suitable for the local technology environment and may include, by way of non-limiting example, one or more of a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor architecture. The processors 120, 152, and 175 may be means for performing functions as described herein and other functions for controlling the UE 110, the gNB 170, and / or network devices such as the NCE / MME / SGW / UDM / PCF / AMM / SMF / LMF / LMC 190, as in FIG. 6.

[0066] It should be noted that the functionality of any device as shown in FIG. 6, e.g., UE 110 and / or gNB 170, according to exemplary embodiments of the present invention, may also be implemented by other network nodes, e.g., wireless or wired relay nodes (also known as integrated access and / or backhaul (IAB) nodes). In the case of IAB, the UE functionality may be performed by the MT (Mobile Terminal) section of the IAB node, and the gNB functionality may be performed by the DU (Data Unit) section of the IAB node. These devices may be linked to UE 110, as in FIG. 6, via at least wireless link 111 and / or via NCE / MME / SGW / UDM / PCF / AMM / SMF / LMF / LMC 190, which uses link 199 to other network(s) / Internet, as in FIG. 6.

[0067] In general, various embodiments of user equipment 110 may include, but are not limited to, mobile phones such as smartphones, tablets, personal digital assistants (PDAs) with wireless communication capabilities, portable computers with wireless communication capabilities, image capture devices such as digital cameras with wireless communication capabilities, gaming devices with wireless communication capabilities, music storage and playback appliances with wireless communication capabilities, Internet appliances that allow wireless Internet access and browsing, tablets with wireless communication capabilities, and portable units or terminals incorporating combinations of such capabilities.

[0068] The idea for solving the above problems can be crystallized as follows:

[0069] The procedure by which the UE determines the CORESETs for which the PDCCH is monitored is different depending on whether these CORESETs have different QCL-TypeD and whether the PDCCH repetition behavior is correct. (i.e., the same DCI is repeated via multiple SSSETs associated with multiple CORESETs) may be based on one or more of the following: 〇 In option (Option1) , select a first CORESET based on the Rel-15 / Rel-16 mechanism, and if the first CORESET is linked with a second CORESET, select the second CORESET for PDCCH monitoring. in particular By monitoring a second QCL-TypeD, it is possible to monitor a second CORESET (e.g., a second panel on the UE). If there is a CORESET linked to the first CORESET already selected, it will be tagged as the second CORESET. CORESETs not linked to the first CORESET (with QCL-TypeD other than the selected QCL-TypeD) are not monitored by the UE. If there is a link between the first and second CORESET, both are monitored simultaneously. Note that a link between two CORESETs can result from two linked SS sets, each corresponding to one CORESET, and / or Monitoring can also be expanded to monitor other CORESETs from multiple CORESETs configured with the second QCL-TypeD.

[0070] Additionally, under Option 1, the following is possible: 1) The link of search space sets is configured by RRC (if PDCCH repetition is supported by the UE). Each search space set is associated with a CORESET. Therefore, a concatenation of CORESETs (maximum of two CORESETs) can be derived. This is not a novel part of this invention. 2) In Option 1, we define a rule to find two QCL-TypeDs using the concatenation of two CORESETs. In summary, we find the first QCL-TypeD and the CORESET associated with the first QCL-TypeD. Then, we check whether the CORESET with the first QCL-TypeD has a link to another CORESET with a different QCL-TypeD. If yes, we start monitoring the second QCL-TypeD in addition to the first QCL-TypeD.

[0071] *Please note that some novelties found in the selections in this paper are underlined and / or bolded.

[0072] The procedure by which the UE determines the CORESET in which the PDCCH is monitored is based on one or more of the following, where these CORESETs may have different QCL-TypeD and the PDCCH repetition behavior: (i.e., the same DCI is repeated via multiple SSSETs associated with multiple CORESETs).

[0073] In the Option 1 version, the first CORESET is selected based on the Rel-15 / Rel-16 mechanism, If the first CORESET is linked with the second CORESET, the second CORESET is used for PDCCH monitoring. You can select: in particular 〇 Monitor the second CORESET by monitoring the second QCL-TypeD (UE second panel) If a linked CORESET exists for the first CORESET already selected, it will be tagged as the second CORESET. 〇 CORESETs that are not linked with the first CORESET (having QCL-TypeD other than the selected QCL-TypeD) are not monitored by the UE. Note that if there is a link between a first CORESET and a second CORESET, both are monitored simultaneously, and the link between the two CORESETs may result from two linked SS sets, each corresponding to one CORESET; and / or 〇 The monitoring can also be extended to monitor other CORESETs from multiple CORESETs configured in a second QCL-TypeD. .

[0074] [Example] Assume that a UE monitors two cells, each of which has three CORESETs and three QCL-TypeDs (#Q1, #Q2, #Q3). Assume that two CORESETs are linked in cell 2. The relationship between CORESETs and QCL-TypeDs can be expressed as follows: CORESETs #1_1: QCL #Q1 CORESETs #1_2: QCL #Q3 CORESETs #1_3: QCL #Q3 CORESETs #2_1: QCL #Q1(Link)CORESETs #2_2: QCL #Q2(Link)CORESETs #2_3: QCL #Q2

[0075] Based on Rel-15, the UE can select CORESTE#1_1 as the QCL type D to monitor, i.e., QCL#Q1. Furthermore, based on Rel-15, the UE can select CORESETs#1_1 and CORESETs#2_1 as the same QCL-TypeD By linking CORESET#2_1 and CORESET#2_2, the QCL-TypeD (QCL #Q2) can also be selected. After selection, the UE monitors all CORESETs of this second QCL monitor eD, so it can also monitor CORESET#2_2 and #2_3.

[0076] In option (option 2),The first and second CORESETs are selected based on a new mechanism (not based on Rel-15 / Rel-16), and the new mechanism enables PDCCH monitoring of linked CORESETs. In other words, this option modifies the current Rel-15 / Rel-16 rule by always searching for the CORESET that has a linked SS set (instead of looking for the lowest CSS index or the lowest USS index of the cell with the lowest index). Priority is given to monitor CORESETs that allow PDCCH repetition and is not based on CSS / USS index. If PDCCH repetition is configured in multiple cells, select the linked CORESET in the cell with the lower or higher index; The new mechanism above is only applicable if PDCCH repetition is configured for the UE, and / or If two or more linked CORESETs have linked SS sets, select the linked CORESET with the lower or higher index, or select the linked CORESET with the higher or lower index among the linked CORESETs corresponding to the CSS / USS.

[0077] In option (option 3) ,Selecting a second CORESET with a different QCL-TypeD from the ,first CORESET without considering the concatenation of SS sets, i.e., ,monitoring different QCL-TypeDs from different CORESETs without ,necessarily considering the presence or absence of a link.,One sub-option is as follows. 〇 One suboption is,A second CORESET having a QCL-TypeD different from the QCL-TypeD of the first CORESET can be selected based on extending the Rel-15 / Rel-16 rules by selecting a first CORESET based on the Rel-15 / Rel-16 rules and considering only CORESETs associated with link SS sets whose CSS / USS IDs are not associated with the QCL-TypeD of the first (selected) CORESET; One sub-option allows you to select the first corset based on the Rel15 / 16 rules and only select the second corset from the linked SS set. If the first selected CORESET corresponds to a CSS set (or USS set), the second CORESET selection can be based on Rel15 / 16 rules; If the first monitored CORESET corresponds to a USS set (or a CSS set), the second CORESET can be selected from the CORESETs linked to the first CORESET (among the linked SS sets); If two or more linked CORESETs are selected as the second CORESET (based on the rules above), select the CORESET with the lower / higher index, or select the CORESET with the higher / lower index corresponding to the CSS / USS. Additionally, option 3: Select two QCL-TypeDs from different CORESETs The selection is defined to follow general principles and is completely independent of the use case (PDCCH repetition, multi-DCI reception, etc.). It does not necessarily have to take into account whether they are linked or not. For example, it is possible to select a first CORESET based on Rel-15 / Rel-16 rules, and then select a second CORESET with a QCL-TypeD different from that of the first CORESET based on Rel-15 / Rel-16 extensions.

[0078] In option 3, a general principle is used to select a second CORESET that has a different QCL-TypeD than the QCL-TypeD of the first CORESET, without considering the supported use cases. In other words, monitoring different QCL-TypeDs from different CORESETs applies without considering whether they are necessarily linked (or depending on the use case).

[0079] In one variation, a first CORESET may be selected based on Rel-15 / Rel-16 rules, and a second CORESET having a QCL-TypeD different from the QCL-TypeD of the first CORESET may be selected based on extending the Rel-15 / Rel-16 rules by considering CORESETs that are not related to the QCL-TypeD of the first selected CORESET.

[0080] This allows the gNB to select the RRC configuration of the CSS / USS set and CORESET so that the UE also selects the first and second QCL-TypeD for PDCCH repetition using the defined principles.

[0081] In another variant, additional restrictions on the selection can be defined on the UE side to support different use cases. To support PDCCH repetition, the CSS / USS ID is not associated with QCL-Type D of the first (selected) CORESET. Linked Only CORESETs associated with SS sets and / or selecting a second CORESET having a QCL-TypeD different from the QCL-TypeD of the first CORESET based on extending the Rel-15 / Rel-16 rules by considering Extending Rel-15 / Rel-16 rules to support multi-DCI multi-TRP operation CORESETPoolIndex (CORESET group defined to support m-DCI) is different,Considering the CORESETs that are not associated with the ,first (selected) CORESET QCL-TypeD, select a second CORESET ,with a QCL-TypeD different from the QCL-TypeD of the ,first CORESET.

[0082] The following examples illustrate several options according to exemplary embodiments of the present invention.

[0083] FIG. 2 illustrates an example of monitoring overlapping CORESETs with different QCL-Type D in linkage-based PDCCH repetition according to an exemplary embodiment of the present invention.

[0084] Figure 2 shows an example of using Option 1 when the "prioritization" of two CORESETs (with two different QCL-TypeD) is monitored based on their concatenation.

[0085] As shown in step 210 of Figure 2, a first CORESET is selected based on the Rel-15 / Rel-16 mechanism. A determination is made as to whether there is a candidate CORESET linked with the first CORESET, as shown in step 220 of Figure 2. If step 220 is "no," there is no need to monitor the candidate CORESET, as shown in step 225 of Figure 2. If step 220 is "yes," consider this candidate CORESET tagged as the second CORESET and monitor both CORESETs simultaneously, as shown in step 230.

[0086] If the above Rel-15 / Rel-16 rules are used to select the first CORESET, the following procedure is adopted. "The UE monitors PDCCH candidates in multiple CORESETs with the same or different QCL-TypeD characteristics on the active DL BWP(s) of one or more cells in overlapping PDCCH monitoring scenarios. ● The UE monitors the PDCCH only in the CORESET and other CORESETs from multiple CORESETs that have the same QCL-TypeD characteristics as the CORESET on the active DL BWP of the cell from one or more cells; ● CORESET corresponds to the CSS set with the lowest index in the cell with the lowest index that contains CSS, otherwise it corresponds to the USS set with the lowest index in the cell with the lowest index. ● The lowest USS set index is determined across all USS sets that have at least one PDCCH candidate in overlapping PDCCH monitoring opportunities.”

[0087] FIG. 3 illustrates an example of monitoring overlapping CORESETs in different QCL-Type D with PDCCH repetitions based on SS sets linked between other SS sets, according to an exemplary embodiment of the present invention.

[0088] Figure 3 shows an example of using Option 2 when the prioritization of two CORESETs (with two different QCL-TypeD) is monitored based on a modification of the current Rel-15 / Rel-16 rules for the repetition of linked SS sets of the two CORESETs. Therefore, the monitoring of the CORESET that allows the PDCCH repetition operation is not based on the monitoring of the lowest CSS / USS index as implemented in Rel-15 / 16.

[0089] A determination is made as to whether the candidate has a linked SS set, as shown in step 310 of Figure 3. If the answer to step 310 is "no," then there is no need to monitor the candidate CORESET(s), as shown in step 315 of Figure 3. If the answer to step 310 is "yes," then the candidate CORESET(s) are tagged as a first CORESET and a second CORESET, as shown in step 320 of Figure 3.

[0090] FIG. 4 illustrates an example of PDCCH repetition and monitoring of overlapping CORESETs with different QCL-Type Ds whose CSS / USS IDs are not associated with the QCL-Type D of the first (selected) CORESET, according to an exemplary embodiment of the present invention.

[0091] Figure 4 shows an example of using Option 3 (first sub-option) when prioritizing two CORESETs (having two different QCL-TypeDs) based on not considering link SS sets selected for the second CORESET if only CSS / USS IDs not associated with the CSS / USS ID of the QCL-TypeD of the first selected CORESET are included. As an example, the first CORESET is selected based on Rel-15 / Rel-16 rules, and the second CORESET is selected from among CORESETs whose CSS / USS IDs are associated with link SS sets not associated with the first (selected) CORESET QCL-TypeD.

[0092] As shown in step 410 of FIG. 4, a determination is made as to whether there are two different candidate CORESETs without linking SS sets. If the answer to step 410 is no, then the candidate CORESET does not need to be monitored, as shown in step 415 of FIG. 4. If the answer to step 410 is yes, then a first CORESET is selected based on the Rel-15 / Rel-16 mechanism, as shown in step 420 of FIG. 4. As shown in step 425 of FIG. 4, a determination is made as to whether there is a CSS / USS ID among the CSS / USS IDs of the first CORESET. If the answer to step 425 is yes, then the candidate CORESET does not need to be monitored, as shown in step 430 of FIG. 4. If the answer to step 425 is no, then this candidate CORESET is considered tagged as the second CORESET, as shown in step 435 of FIG. 4.

[0093] An exemplary flow diagram illustrating the operation of a UE considering the two discussed options for PDCCH repetition using multiple overlapping CORESETs with different QCL-TypeD is shown in FIG.

[0094] FIG. 5 is a flow diagram illustrating the operation of a UE considering the two discussed options for PDCCH repetition with multiple overlapping CORESETs with different QCL-Type D, in accordance with an exemplary embodiment of the present invention.

[0095] As shown in step 510 of Figure 5, the UE receives two beams on different panels (two different QCL-Type Ds) monitoring multiple core sets with different QCL-Type Ds using the PDCCH repetition behavior for M-TRP PDCCH repetition. As shown in option 1 step 520 of Figure 5, the UE prioritizes the selection of two core sets based on the link of the second core set to the first core set selected based on Rel-15 / Rel-16. As shown in option 2 step 530 of Figure 5, the UE prioritizes the selection of two CORESETs based on the link of the second CORESET selected based on having a linked SS set. Next, as shown in step 535 of Figure 5, the UE decodes DCI by considering both the CORESETs' PDCCH and the candidates (soft combining).

[0096] FIG. 7 illustrates a method according to an exemplary embodiment of the present invention that may be performed by an apparatus.

[0097] 7 illustrates operations that may be performed by an apparatus, such as, but not limited to, an apparatus (e.g., eNB / gNB 170 as in FIG. 6 ). As shown in step 710 of FIG. 7 , a network device of a communication network determines to monitor physical downlink control channel candidates of two or more control resource sets of the communication network, where the two or more control resource sets use different QCL-Type Ds. Next, as shown in step 720 of FIG. 7 , at least two control resource sets of the two or more control resource sets with different QCL-Type Ds are selected to monitor at least two of the physical downlink control channel candidates.

[0098] According to the example embodiment described in the paragraph above, selecting at least two control resource sets having different QCL-Type D associated with a physical downlink control channel repetition.

[0099] According to the example embodiment described in the above paragraph, the two or more control resource sets comprise at least a first control resource set and at least one other control resource set.

[0100] According to the exemplary embodiment described in the paragraph above, the selecting further includes selecting the first control resource set and at least one other control resource set of the two or more control resource sets for monitoring based on a link between the first control resource set and the at least one other control resource set.

[0101] According to the exemplary embodiment described in the above paragraph, the link between the first control resource set and the at least one other control resource set comprises linking search space sets of the first control resource set and the at least one other control resource set.

[0102] According to the exemplary embodiment described in the above paragraph, the monitoring includes monitoring physical downlink control channel candidates of at least one other control resource set associated with the second QCL-TypeD.

[0103] In accordance with the exemplary embodiment described in the above paragraph, the monitoring is extended to monitor any control resource set of at least one other control resource set having the same QCL-TypeD as the second QCL-TypeD.

[0104] According to the exemplary embodiment described in the above paragraph, monitoring is not performed on the control resource sets of the two or more control resource sets that are not linked with the first control resource set.

[0105] According to the exemplary embodiment described in the paragraph above, based on there being two or more control resource sets with linked search space sets, selecting comprises selecting the linked control resource set with one of the lowest or highest indexes.

[0106] In accordance with the exemplary embodiment described in the above paragraph, priority is given to monitoring control resource sets that allow repetition of physical downlink control channels that are not based on at least one of a common search space or a UE-specific search space index.

[0107] According to the exemplary embodiment described in the paragraph above, the selection is made based on one or more cells being configured to have physical downlink control channel repetitions, consisting of linked control resource sets in cells having one of the lower index or higher index.

[0108] According to the exemplary embodiment described in the paragraph above, the monitoring consists of monitoring different QCL-TypeDs from different control resource sets of two or more control resource sets without taking into account whether the different control resource sets are linked to each other.

[0109] In accordance with the exemplary embodiment described in the paragraph above, the selecting includes selecting a first control resource set having a first QCL-Type D and selecting a second control resource set having a different QCL-Type D based on a control resource set not associated with the first QCL-Type D.

[0110] In accordance with the exemplary embodiment described in the paragraph above, the selecting uses restrictions to support at least one of physical downlink control channel repetition or multi-transmission point operation.

[0111] In accordance with the exemplary embodiment described in the above paragraph, the restriction considers control resource sets with different core set pool indices associated with a control resource set group defined to support multiple downlink control information modes.

[0112] A non-transitory computer-readable medium (memory(ies) 155 of FIG. 6) storing program code (computer program code 153 and / or selection module 150-2 of FIG. 6), which is executed by at least one processor (processor(s) 120 and / or selection module 150-1 of FIG. 6) to perform at least the operations as described in the paragraphs above.

[0113] According to the exemplary embodiment of the present invention described above, means for determining physical downlink control channel candidates for monitoring two or more control resource sets of a communication network (one or more transceivers 160, memory(s) 155, computer program code 153 and / or selection module 150-2, and processor(s) 120 and / or selection module 150-1 as in FIG. 6 ), wherein the two or more control resource sets use different QCL-Type D; There is an apparatus having means for selecting at least two control resource sets of two or more control resource sets with different QCL-TypeDs for monitoring at least two of the physical downlink control channel candidates (similar to FIG. 6, one or more transceivers 160, memory(s) 155, computer program code 153 and / or selection module 150-2, and processor(s) 120 and / or selection module 150-1).

[0114] In an exemplary embodiment of the invention according to the above paragraph, at least the means for determining and selecting comprises a non-transitory computer-readable medium [memory(s) 155 in FIG. 6] encoded with a computer program [computer program code 153 and / or selection module 150-2 in FIG. 6] executable by at least one processor [processor(s) 152 and / or selection module 150-1 in FIG. 6].

[0115] Advantages of the exemplary embodiments of the invention disclosed herein include: ● Extending the CORESET QCL-TypeD selection rules when using PDCCH repetition; ● Covering the Rel15 / 16 framework for monitoring multiple overlapping CORESETs; ● Adopting a set of assumptions to identify the QCL-TypeD priority rule when the UE applies two different panel beam changes and receives two different beams; It is submitted that the

[0116] In accordance with exemplary embodiments of the present invention disclosed in this application, the "circuitry" provided may include at least one or more or all of the following: (a) hardware-only circuit implementations (e.g., analog and / or digital-only implementations); (b) a combination of hardware circuitry and software, e.g., (if applicable); (i) a combination of analog and / or digital hardware circuitry and software / firmware; and (ii) a hardware processor with software (including a digital signal processor), software, and memory operating together to perform various functions, such as a mobile phone or server, or other device that functions or operates in accordance with the exemplary embodiments of the invention disclosed herein; (c) Hardware circuits and processors, such as microprocessors or portions of microprocessors, that require software (e.g., firmware) to operate, but where the software may not be present when not required for operation.

[0117] In accordance with exemplary embodiments of the present invention, suitable circuitry exists for performing at least the novel operations as disclosed in this application, and this "circuitry" as used herein refers to at least the following: (a) hardware-only circuit implementations (e.g., analog and / or digital-only implementations); (b) combinations of circuitry and software (and / or firmware), as applicable, including (i) a processor combination, or (ii) a processor / software (including a digital signal processor), software, and portions of memory that work together to cause a device, such as a mobile phone or server, to perform various functions; and (c) Any circuitry that requires software or firmware for its operation, such as a microprocessor or part of a microprocessor, even if the software or firmware is not physically present.

[0118] This definition of "circuit," as used herein, by way of further example, applies to all uses of the term in this application, including the claims. The term "circuit" also covers simply a processor(s) or portion of a processor and its(their) accompanying software and / or firmware implementation. The term "circuit" also covers, for example, a baseband integrated circuit or an application processor integrated circuit for a mobile phone, or similar integrated circuits in a server, cellular network equipment, or other network equipment, if applicable to particular claim elements.

[0119] In general, various embodiments may be implemented in hardware or special purpose circuits, software, logic, or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor, or other computing device, although the invention is not limited thereto. While various aspects of the invention may be illustrated and described using block diagrams, flowcharts, or some other pictorial representations, it will be appreciated that these blocks, apparatus, systems, techniques, or methods described herein may be implemented in, by way of non-limiting example, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller, or other computing device, or some combination thereof.

[0120] Embodiments of the present invention can be implemented in a variety of components, such as integrated circuit modules. The design of integrated circuits is generally a highly automated process. Complex and powerful software tools are available to convert logic-level designs into semiconductor circuit designs ready to be etched onto semiconductor substrates.

[0121] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. All embodiments described in this detailed description are exemplary embodiments provided to enable any person skilled in the art to make or use the invention and do not limit the scope of the invention, which is defined by the claims.

[0122] The foregoing description provides, by way of illustrative and non-limiting example, a complete and informative description of the best method and apparatus presently contemplated by the inventors for carrying out the invention. However, various modifications and adaptations will become apparent to those skilled in the relevant art in view of the foregoing description, when read in conjunction with the accompanying drawings and the appended claims. However, all such and similar variations of the teachings of this invention will still fall within the scope of this invention.

[0123] It should be noted that the terms "connected," "coupled," or variations thereof refer to a direct or indirect connection or coupling between two or more elements, and may encompass the presence of one or more intermediate elements between two "connected" or "coupled" elements. The coupling or connection between elements may be physical, logical, or a combination thereof. As employed herein, two elements may be considered to be "connected" or "coupled" together through the use of one or more wires, cables, and / or printed electrical connections, as well as through the use of electromagnetic energy, such as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0124] Moreover, some of the features of the preferred embodiments of the present invention may be used to advantage without the corresponding use of other features. As such, the foregoing description should be considered as merely illustrative of the principles of the present invention, and not in limitation thereof.

Claims

1. 1. A means for determining to monitor physical downlink control channel candidates of two or more control resource sets of a communication network, comprising: two or more control resource sets using different quasi-co-location types associated with one or more spatial reception parameters (QCL-TypeD); means for selecting a first control resource set and at least one other control resource set from two or more control resource sets having different QCL-TypeDs for monitoring at least two of the physical downlink control channels; Equipped with the first control resource set and the at least one other control resource set are selected at least in part based on a link between the first control resource set and the at least one other control resource set; The link between the first control resource set and the at least one other control resource set includes that search space sets of the first control resource set and the at least one other control resource set are linked; selecting the first control resource set and the at least one other control resource set based on the link includes selecting the at least one other control resource set in response to the at least one other control resource set having a link configured with the first control resource set. Device.

2. 10. The apparatus of claim 1, wherein the selecting comprises selecting at least two control resource sets having different QCL-Type D associated with a physical downlink control channel repetition.

3. The apparatus of claim 1 , wherein the two or more control resource sets comprise at least a first control resource set and at least one other control resource set.

4. The apparatus of claim 3 , wherein the monitoring comprises monitoring physical downlink control channel candidates of the at least one other control resource set associated with a second QCL-Type D.

5. The apparatus of claim 4 , wherein the monitoring is extended to monitor any control resource set of the at least one other control resource set that has the same QCL-Type D as the second QCL-Type D.

6. The apparatus of claim 3 , wherein the monitoring is not performed on control resource sets of the two or more control resource sets that are not linked with the first control resource set.

7. 2. The apparatus of claim 1, wherein the selecting comprises selecting a first control resource set and at least one other control resource set of the two or more control resource sets based on a linkage between the first control resource set and at least one other control resource set.

8. 8. The apparatus of claim 7, wherein the linking between the first control resource set and the at least one other control resource set includes linking search space sets of the first control resource set and the at least one other control resource set.

9. 8. The apparatus of claim 7, wherein, based on there being at least two control resource sets having linked search space sets, the selecting comprises selecting a linked control resource set having one of a lowest or highest index.

10. 10. The apparatus of claim 9, wherein priority is given to monitoring control resource sets that allow physical downlink control channel repetition that is not based on at least one of a common search space and a user equipment specific search space index.

11. 8. The apparatus of claim 7, wherein the selecting comprises selecting a linked control resource set in a cell having one of a lower index or a higher index based on one or more cells being configured with physical downlink control channel repetition.

12. 2. The apparatus of claim 1, wherein the monitoring includes monitoring the different QCL-Type Ds from different control resource sets among the two or more control resource sets without considering whether the different control resource sets are linked to each other.

13. The selecting comprises: selecting a first control resource set having a first QCL-Type D; selecting a second control resource set having a different QCL-Type D based on a control resource set not associated with the first QCL-Type D; The apparatus of claim 1 , comprising:

14. 10. The apparatus of claim 1, wherein the selecting comprises using restrictions to support at least one of physical downlink control channel repetition or multiple transmission / reception point operation.

15. The apparatus of claim 1 , wherein the apparatus comprises or is comprised within a user equipment.

16. determining physical downlink control channel candidates to monitor for two or more control resource sets of a communications network, two or more control resource sets using different quasi-co-location types associated with one or more spatial reception parameters (QCL-TypeD); selecting a first control resource set and at least one other control resource set from the two or more control resource sets having different QCL-Type D for monitoring at least two of the physical downlink control channels; Including, the first control resource set and the at least one other control resource set are selected at least in part based on a link between the first control resource set and the at least one other control resource set; The link between the first control resource set and the at least one other control resource set includes that search space sets of the first control resource set and the at least one other control resource set are linked; selecting the first control resource set and the at least one other control resource set based on the link includes selecting the at least one other control resource set in response to the at least one other control resource set having a link configured with the first control resource set. method.

17. 17. The method of claim 16, wherein the selecting step comprises selecting at least two control resource sets having different QCL-TypeD associated with a physical downlink control channel repetition.

18. 17. The method of claim 16, wherein the selecting step comprises selecting a first control resource set and at least one other control resource set of the two or more control resource sets based on a linkage between the first control resource set and at least one other control resource set.

19. 20. The method of claim 18, wherein the linking between the first control resource set and the at least one other control resource set comprises linking search space sets of the first control resource set and the at least one other control resource set.

20. determining at least physical downlink control channel candidates to monitor for two or more control resource sets of the communication network, two or more control resource sets using different quasi-co-location types associated with one or more spatial reception parameters (QCL-TypeD); selecting a first control resource set and at least one other control resource set from the two or more control resource sets having different QCL-Type D for monitoring at least two of the physical downlink control channels; storing program instructions for executing the the first control resource set and the at least one other control resource set are selected at least in part based on a link between the first control resource set and the at least one other control resource set; The link between the first control resource set and the at least one other control resource set includes that search space sets of the first control resource set and the at least one other control resource set are linked; selecting the first control resource set and the at least one other control resource set based on the link includes selecting the at least one other control resource set in response to the at least one other control resource set having a link configured with the first control resource set. A non-transitory computer-readable medium.

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