Core set selection with different qcl-type d for m-trp pdcch repetition

Abstract

According to example embodiments of the present application, there are at least one method and apparatus for performing the following operations: 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-TypeD; and selecting at least two control resource sets of the two or more control resource sets having different QCL-TypeD for monitoring at least two of the physical downlink control channel candidates.

Description

[0001] Cross-references

[0002] This application claims priority to U.S. Provisional Application No. 63 / 230112, filed August 6, 2021, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The teachings of exemplary embodiments of the present invention generally relate to determining a CORESET for monitoring physical resources, and more specifically to determining a CORESET with different QCL-TypeD for monitoring physical resources when using PDCCH repetition. Background Technology

[0004] This section is intended to provide background or context for the invention as set forth in the claims. The description herein may include concepts that may be pursued, but are not necessarily concepts that have been previously conceived or pursued. Therefore, unless otherwise stated herein, the content described in this section is not prior art to the description and claims of this application, and is not admitted to be prior art by virtue of its inclusion in this section.

[0005] Some abbreviations that may be found in the instruction manual and / or figures are defined here as follows:

[0006] AL aggregation level

[0007] BD blind decoding

[0008] CORESET Control Resource Set

[0009] CSS Public Search Space

[0010] DCI Downlink Control Information

[0011] gNB 5G Node B

[0012] MAC CE MAC control element

[0013] M-TRP Multiple Transmit and Receive Points

[0014] OFDM (Orthogonal Frequency Division Multiplexing)

[0015] PDCCH (Physical Downlink Control Channel)

[0016] PDSCH (Physical Downlink Shared Channel)

[0017] QCL Quasi-co-located

[0018] SS Search Space

[0019] SSSet Search Space Set

[0020] TCI Transport Configuration Indicator

[0021] TRP Transmit and Receive Points

[0022] UE User Equipment

[0023] USS UE-specific search space

[0024] At the time of this application, with the continued increase in demand for radio access, further improvements are needed in various aspects of communication systems, including improving the data rate, latency, reliability, and / or mobility of wireless communication in cellular wireless communication systems, such as 5G NR. Such improvements involve the selection of control resource sets for this communication.

[0025] The exemplary embodiments of the present invention are provided for further improving this operation. Summary of the Invention

[0026] In an exemplary aspect of the invention, there is an apparatus comprising: at least one processor; and at least one non-transient memory including computer program code, wherein the at least one non-transient memory and the computer program code are configured, together with the at least one processor, to cause the apparatus to at least: determine physical downlink control channel candidates for two or more sets of control resources of a communication network to be monitored, wherein the two or more sets of control resources use different QCL-TypeDs; and select at least two sets of control resources with different QCL-TypeDs from the two or more sets of control resources for monitoring at least two physical downlink control channel candidates.

[0027] In another example aspect of the invention, there is a method comprising: determining, by a network device of a communication network, physical downlink control channel candidates of two or more control resource sets of the communication network to be monitored, 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 physical downlink control channel candidates.

[0028] Another example embodiment is an apparatus and a method comprising the apparatus and method described in the foregoing paragraphs, wherein selection includes selecting at least two control resource sets with different QCL-TypeDs that are repeatedly associated with a physical downlink control channel, wherein the two or more control resource sets include at least a first control resource set and at least one other control resource set, wherein selection further includes selecting the first control resource set and at least one other control resource set based on a link between the first control resource set and at least one other control resource set in the two or more control resource sets, wherein the link between the first control resource set and at least one other control resource set includes a search space set of the first control resource set and at least one other control resource set being linked, wherein monitoring includes monitoring physical downlink control channel candidates of at least one other control resource set associated with a second QCL-TypeD, wherein monitoring is extended to monitor any control resource set in at least one other control resource set that has the same QCL-TypeD as the second QCL-TypeD, wherein monitoring is not performed on control resource sets in the two or more control resource sets that are not linked to the first control resource set, wherein the selection is based on the existence of a search space set with a link. At least two control resource sets, selection includes selecting a control resource set linked with one of the lowest or highest indices, wherein priority is given to control resource sets that allow physical downlink control channel repetition for monitoring, rather than based on at least one of the indices in the common search space or UE-specific search space, wherein selection is based on more than one cell being configured with physical downlink control channel repetition, selection includes selecting a control resource set linked with one of the lower or higher indices in the cell, wherein monitoring includes monitoring different QCL-TypeDs from different control resource sets from two or more control resource sets, regardless of whether the different control resource sets are linked to each other, wherein selection includes selecting a first control resource set with a first QCL-TypeD and selecting a second control resource set with different QCL-TypeDs based on control resource sets not associated with the first QCL-TypeD, wherein selection uses constraints to support at least one of physical downlink control channel repetition or multiple transmit and receive point operation, and / or wherein the constraints consider control resource sets with different CORESET pool indices associated with a group of control resource sets defined as supporting multiple downlink control information modes.

[0029] In another example aspect of the invention, there is a non-transient computer-readable medium storing program code that is executed by at least one processor to perform at least the methods described in the preceding paragraphs.

[0030] In another example aspect of the invention, there is an apparatus comprising: means for determining physical downlink control channel candidates of two or more control resource sets for monitoring a communication network, wherein the two or more control resource sets use different QCL-TypeDs; and means for selecting at least two control resource sets with different QCL-TypeDs from the two or more control resource sets for monitoring at least two physical downlink control channel candidates.

[0031] According to the example embodiments described in the preceding paragraphs, at least the components used for determining and selecting include a network interface and computer program code stored on a computer-readable medium and executed by at least one processor.

[0032] In another example aspect of the invention, there is a communication system that includes a network-side device and a user equipment-side device that perform the operations described above. Attached Figure Description

[0033] The above and other aspects, features, and benefits of the various embodiments of this disclosure will become more apparent from the following detailed description with reference to the accompanying drawings, wherein similar reference numerals are used to denote similar or equivalent elements. The drawings are shown to facilitate a better understanding of the embodiments of this disclosure and are not necessarily drawn to scale. In the drawings:

[0034] Figure 1 The process of generating PDCCH based on DCI is shown;

[0035] Figure 2 An example of monitoring overlapping CORESETs with different QCL-TypeDs based on linking in the case of PDCCH repetition, according to an exemplary embodiment of the present invention, is shown.

[0036] Figure 3 An example of monitoring overlapping CORESETs with different QCL-TypeDs based on SS sets linked in other SS sets according to an exemplary embodiment of the present invention is shown;

[0037] Figure 4 An example of detecting overlapping CORESETs with different QCL-TypeDs by utilizing PDCCH repetition and a CSS / USS ID not associated with the first (selected) CORESET QCL-TypeD is shown according to an exemplary embodiment of the present invention.

[0038] Figure 5A flowchart illustrating UE operation, according to an exemplary embodiment of the present invention, takes into account two discussed options for PDCCH repetition in the case of multiple overlapping CORESETs with different QCL-TypeDs;

[0039] Figure 6 A high-level block diagram of various devices for carrying out various aspects of the present invention is shown; and

[0040] Figure 7 A method that can be performed by an apparatus according to an example embodiment of the present invention is shown. Detailed Implementation

[0041] In an exemplary embodiment of the present invention, at least one method and apparatus are provided for performing the determination of CORESETs with different QCL-TypeDs for monitoring physical resources when using PDCCH repetition.

[0042] Example embodiments of the present invention may relate to 3GPP New Radio (NR) physical layer design. More specifically, we focus on facilitating the linking of Physical Downlink Control Channel (PDCCH) candidate search space sets (SSSets) when applying repetition and beam diversity for PDCCH transmission.

[0043] From a physical layer perspective, data and signaling messages in NR are carried on downlink (DL) and uplink (UL) physical channels. In these channels, the PDCCH plays a central role in tasks such as DL scheduling allocation and UL scheduling authorization. The PDCCH in NR carries downlink control information (DCI). The DCI contains scheduling information for the UL or DL ​​data channels and other control information for one UE or a group of UEs.

[0044] PDCCH:

[0045] Channel coding and downlink control information (DCI) construction.

[0046] The process used to generate PDCCH Figure 1The following explains the process. If the DCI format size is less than 12 bits, some zero-padding bits are appended until the payload size equals 12 bits. For each DCI payload bit, a 24-bit Cyclic Redundancy Check (CRC) is calculated and appended to the payload. The CRC allows the UE to detect errors in the decoded DCI payload bits. After appending the CRC, the last 16 CRC bits are masked by a corresponding identifier (called a Radio Network Temporary Identifier (RNTI)). Using the RNTI mask, the UE can detect its unicast data in the DCI and distinguish between DCI sets with different purposes and the same payload size. The appended CRC bits are then interleaved to distribute CRC bits among the information bits. The maximum input size supported by the interleaver is 164 bits. This means that a DCI without CRC can have a maximum of 140 payload bits. These bits are then encoded by a polar coordinate encoder to protect the DCI from errors during transmission. The encoder output is processed using a sub-block interleaver and then rate-matched to fit the allocated payload resource elements (REs) of the DCI.

[0047] Each DCI payload bit is individually scrambled by a scrambling sequence generated from a 31-bit Gold sequence. The scrambling sequence is initialized by the cell's physical layer cell identity or by the UE-specific scrambling identity and UE-specific cell RNTI (C-RNTI). After the scrambled DCI bit sequence is modulated by Quadrature Phase Shift Keying (QPSK), 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 one REG is defined as a PRB in an OFDM symbol. An OFDM symbol contains nine REs for the PDCCH payload and three Demodulation Reference Signals (DMRS) REs. For each DCI, 1, 2, 4, 8, or 16 CCEs can be allocated, with the number of CCEs for a DCI represented by the Aggregation Level (AL). Using QPSK modulation, a CCE contains 54 payload REs, thus carrying 108 bits. This requires the output size of the rate-matched block to be L·108, where L is the associated AL. gNB can adaptively select appropriate ALs for DCI rate adjustment based on channel environment and available resources.

[0048] Control Resource Set (CORESET)

[0049] A DCI with ALL is mapped to physical resources in a given BWP, where necessary parameters such as frequency and time domain resources and scrambling sequence identifiers for DMRS used in PDCCH are configured to the UE via a control resource set (CORESET). On each of up to four BWPs on the serving cell, the UE can be configured with up to three CORESETs in version 15 and up to five CORESETs in version 16 (for multi-DCI M-TRP operation). Typically, a CORESET is configured in units of six PRBs on six PRB frequency grids and one, two, or three consecutive OFDM symbols in the time domain.

[0050] The DCI of AL L consists of L consecutively numbered CCEs, and the CCEs are mapped onto multiple REGs in the CORESET. NR supports distributed and localized resource allocation of the DCIs in the CORESET. This is done by configuring interleaved or non-interleaved CCE-to-REG mappings for each CORESET. For interleaved CCE-to-REG mappings, the REG bundles of the CCEs constituting the PDCCH are distributed in the frequency domain as REG bundles. A REG bundle is a set of indivisible resources consisting of adjacent REGs. The REG bundle spans all OFDM symbols of a given CORESET. Once the REG corresponding to the PDCCH is determined, the modulation symbols of the PDCCH are mapped first in the frequency domain and then in the time domain to the REs of the determined REGs, i.e., in ascending order of RE index and symbol index, respectively.

[0051] PDCCH Monitoring – Search Space Set (SSSet)

[0052] The UE performs blind decoding on a set of PDCCH candidates. A search space (SS) set is used to configure the UE to monitor the PDCCH candidates. There are two types of SS sets: public SS (CSS) sets, which are typically monitored by a group of UEs in the cell; and UE-specific SS (USS) sets, which are monitored by an individual UE. A UE can be configured with up to 10 SS sets, each serving up to 4 BWPs in the cell. Typically, the SS set configuration provides the UE with the SS set type (CSS or USS), the DCI formats(s) to be monitored, the monitoring timing, and the number of PDCCH candidates for each AL in the SS set.

[0053] The SS set with index s is associated with only one CORESET with index p. The UE determines the time slots for monitoring the indexed SS set based on higher-layer parameters k, offset o, and duration d, where k and offset o provide the starting time slot and duration d provides the number of consecutive time slots, where the SS set is monitored starting from the time slot identified by k and o.

[0054] PDCCH repeating frame

[0055] As agreed in RAN1#103-e, Alt3 (two SS sets associated with the corresponding CORESET) is supported for PDCCH repeatability and reliability enhancement using non-SFN schemes and Option 2+Case 1.

[0056] Alt3 refers to considering two (or more) SS sets corresponding to different CORESETs, Option 2 refers to using the same DCI to enter the encoding process and repeating one of the two different PDCCH candidates (one for each TCI state), and Case 1 refers to an explicit link between two PDCCHs.

[0057] In version 17 of the M-TRP PDCCH repetition, two PDCCH candidates (transmitted via different TRPs, or more generally with different TCI states) are associated with each other. The UE knows the association or link between the two PDCCH candidates before attempting blind decoding, allowing the UE to perform selective or soft-combination decoding without ambiguity. These associated PDCCH candidates are configured in different SS sets associated with the corresponding CORESET (as mentioned in the working assumptions disclosed herein).

[0058] Note that for QCL configuration, the TCI state is a parameter that can be used to configure the quasi-co-address relationship between one or two downlink reference signals and the DMRS of the PDSCH port.

[0059] Furthermore, it is agreed that the linking of SS sets is based on RRC configuration. When configuring links for the UE, the gNB should also adhere to certain RRC configuration restrictions, such as the two SS sets having the same period, the same DCI format to be monitored, and the same number of candidates per aggregation level. Additionally, these two SS sets are associated with different CORESETs having corresponding TCI states. Note that TCI can be a field in the DCI used to indicate quasi-co-addressing of the PDSCH antenna.

[0060] Regarding monitoring timing, it is also agreed that each monitoring timing in the first SS set is linked to a monitoring timing in the second SS set. Within the two linked monitoring timings, PDCCH candidates with the same aggregation level and the same candidate index are linked to each other.

[0061] More importantly, the benefits of PDCCH repetition (mainly reliability and robustness) can only be obtained when both PDCCH repetitions are decoded at the UE using selective or soft combination decoding methods.

[0062] PDCCH Receive Priority Rule Allocation

[0063] In versions 15 / 16, priority rules for PDCCH reception are defined when a QCL-TypeD conflict occurs, based on the SS type or CORESET ID. For example, QCL types are defined in versions 15 / 16, and QCL-TypeD is a QCL type associated with one or more spatial receiver parameters. PDCCH reception is performed via CORESET overlap, where different QCL-TypeDs are mapped to different beams, and the UE cannot monitor both simultaneously because it is assumed that the UE can monitor via a single panel and a single beam. Therefore, the other PDCCH candidate will be discarded in this situation.

[0064] Note that for PDCCH reception, a control resource set (CORESET) is defined. 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. Each CORESET therefore contains PDCCH candidates and is configured with a TCI state. Thus, if the UE receives a PDCCH, the PDCCH DM-RS is a QCL, the source RS of which is indicated by the TCI state of the CORESET to which the PDCCH belongs. Furthermore, the UE can configure more than one CORESET, for example, per transmission point or beam, each with a different and unique TCI state.

[0065] The possible source RS for the TCI state used in the PDCCH is the SSB; therefore, each SSB used in a cell is configured with a unique TCI state, and when the UE moves within the cell, MAC CE signaling is used to update the TCI state of the configured CORESET. Since a cell in NR can have multiple SSBs (unlike the single PSS / SSS / PBCH per cell in LTE), the MAC CE reconfiguration of the active TCI state of the CORESET can be regarded as an intra-cell handover command, except that no higher-layer (Layer 3) involvement.

[0066] According to the 3GPP specification at the time of this application, the rules for prioritizing PDCCH candidates from overlapping CORESETs (such as when they have different QCL-TypeD attributes) are as follows:

[0067]

[0068] Therefore, the existing QCL-TypeD priority rules across CORESET result in monitoring only one QCL-TypeD, which essentially eliminates FDM (with only time-domain overlapping symbols) PDCCH duplication in FR2, even for UEs that support simultaneous reception of two beams.

[0069] Current 3GPP Status

[0070] The 3GPP Release 17 M-TRP URLLC Enhancement WI aims to support multi-TRP operation, where the UE will be able to receive PDCCH repetitions with different QCL-TypeDs. In this context, the following agreement was reached during RAN1#104-bis-e to support PDCCH repetitions in FR2 via FDM:

[0071]

[0072] To allow FDM PDCCH repetition, we consider monitoring multiple overlapping CORESET / PDCCH candidates with different QCL-TypeD.

[0073] If overlapping CORESETs exist and they have different QCL-TypeD properties, there are limitations to monitoring two PDCCH candidates from different TRPs. As shown below, a rule is applied to prioritize the monitoring of PDCCH candidates:

[0074] If UE

[0075] -Configured for single-cell operation or for carrier aggregation operation within the same frequency band, and

[0076] - On one or more active DL BWPs in one or more cells, monitor PDCCH candidates during overlapping PDCCH monitoring timings across multiple CORESETs with the same or different QCL-TypeD attributes.

[0077] On the active DL BWP of one or more cells, the UE monitors PDCCH only in the CORESET and in any other CORESET among multiple CORESETs having the same QCL-TypeD attribute as the CORESET.

[0078] -CORESET corresponds to the lowest-indexed CSS set in the lowest-indexed cell containing CSS, if any; otherwise, it corresponds to the lowest-indexed USS set in the lowest-indexed cell.

[0079] - During overlapping PDCCH monitoring, determine the lowest USS set index across all USS sets with at least one PDCCH candidate.

[0080] If the same rules are applied when PDCCH repetition is allowed in overlapping CORESETs, the second PDCCH candidate will not be monitored. Therefore, using the existing rules results in PDCCH candidates for the second link not being considered. Therefore, to enable PDCCH repetition that considers overlapping CORESETs, the priority rules need to be enhanced.

[0081] In summary, it is necessary to specify the CORESET selection with different QCL-TypeD when receiving two different beams at the UE, and to explain how to support PDCCH repetition for UEs that support reception of different QCL-TypeD.

[0082] This article summarizes the details of how the NR PDCCH operation works.

[0083] Furthermore, to prevent a core set from being monitored, one approach is to drive the core set corresponding to the lowest-indexed core set in the core set or the core set containing the lowest-indexed core set. This will link to the core set of the core set that will be monitored.

[0084] However, the existing technology has not yet solved the problem of monitoring overlapping CORESETs with different QCL-TypeDs when PDCCH repeated reception is applied to a UE with multiple panels.

[0085] Before further describing the exemplary embodiments of the present invention in detail, refer to Figure 6 . Figure 6 A block diagram of one possible and non-limiting exemplary system in which exemplary embodiments can be practiced is shown.

[0086] like Figure 6As shown, User Equipment (UE) 110 wirelessly communicates with Wireless Network 100. The UE is wireless and is typically a mobile device capable of accessing the wireless network. 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, fiber optic cables, 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. UE 110 may include a selection module 140 configured to perform exemplary embodiments of the invention as described herein. The selection module 140 may be implemented separately in hardware or as part of the processor and / or computer program code of UE 110. Selection module 140 includes one or both of portions 140-1 and / or 140-2, which can be implemented in various ways. Selection module 140 can be implemented in hardware as selection module 140-1, such as as part of one or more processors 120. Selection module 140-1 can also be implemented as an integrated circuit or by other hardware such as a programmable gate array. In another example, selection module 140 can be implemented as selection module 140-2, which is implemented as computer program code 123 and executed by one or more processors 120. Furthermore, note that selection modules 140-1 and / or 140-2 are optional. For example, one or more memories 125 and computer program code 123 can be configured, together with one or more processors 120, to cause user equipment 110 to perform one or more of the operations described herein. UE 110 communicates with gNB 170 via radio link 111.

[0087] The gNB 170 (NR / 5G Node B or possibly an evolved NB) is a base station (e.g., for LTE Long Term Evolution) that provides access to the wireless network 100 for wireless devices (such as UE 110). The gNB 170 includes one or more processors 152, one or more memories 155, one or more network interfaces (multiple N / WI / F) 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. The one or more memories 155 include computer program code 153. The gNB 170 includes a selection module 150 configured to perform exemplary embodiments of the invention as described herein. The selection module 150 may include one or both of portions 150-1 and / or 150-2, which may be implemented in various ways. Selection module 150 may be implemented in hardware alone or as part of the processor and / or computer program code of gNB 170. Selection module 150-1 may be implemented as part of one or more processors 152. 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, which is implemented as computer program code 153 and executed by one or more processors 152. Furthermore, note 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, together with one or more processors 152, to cause gNB 170 to perform one or more of the 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 may communicate using, for example, link 176. Link 176 may be wired or wireless or both, and may implement, for example, an X2 interface.

[0088] One or more buses 157 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, fiber optic or other optical communication devices, wireless channels, etc. For example, one or more transceivers 160 may be implemented as a remote radio headend (RRH) 195, wherein other components of gNB 170 are physically located at a different location from the RRH, and one or more buses 157 may be partially implemented as optical cables for connecting other components of gNB 170 to RRH 195.

[0089] Note that the description in this document indicates that a "cell" performs the function, but it should be clear that the gNB that forms the cell will perform this function. A cell constitutes part of a gNB. That is, each gNB can have multiple cells.

[0090] The wireless network 100 may include an NCE / MME / SGW / UDM / PCF / AMM / SMF / LMF / LMC 190, which may include 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 Access and Mobility (AMF) function, and / or a Session Management (SMF) function, a Location Management Function (LMF), a Location Management Component (LMC), and / or an Authentication Server (AUSF) function, and provides connectivity to other networks, such as telephone networks and / or data communication networks (e.g., the Internet), and supplements or replaces other standard operations at the time of this application, and is configured to perform any 5G and / or NR operations. NCE / MME / SGW / UDM / PCF / AMM / SMF / LMF / LMC 190 can be configured to operate in any of the standards-based communication technologies performed or discussed at the time of this application, according to exemplary embodiments of the invention.

[0091] The gNB 170 is coupled to the NCE / MME / SGW / UDM / PCF / AMM / SMF / LMF / LMC 190 via link 131. Link 131 can be implemented as, for example, 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 (multiple N / WI / F) 180, which are 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 are configured, together with the one or more processors 175, to cause the NCE / MME / SGW / UDM / PCF / AMM / SMF / LMF / LMC 190 to perform one or more operations. In addition, like other devices, besides any other standard operations implemented or discussed at the time of this application, the NCE / MME / SGW / UDM / PCF / AMM / SMF / LMF / LMC 190 is equipped to perform other operations, such as implementing 5G and / or NR operations by controlling the UE 110 and / or gNB 170.

[0092] Wireless network 100 can implement network virtualization, which is a process of combining hardware and software network resources and functions into a single software-based managed entity (virtual network). Network virtualization involves platform virtualization, which is often used in conjunction with resource virtualization. Network virtualization is divided into external network virtualization and internal network virtualization. External network virtualization combines many networks or parts of networks into virtual units, while internal network virtualization provides network-like functionality to software containers on a single system. Note that the virtualized entities created by network virtualization are still implemented to some extent using hardware such as processors 152 or 175 and memories 155 and 171, and these virtualized entities also produce technical effects.

[0093] Computer-readable storage devices 125, 155, and 171 can be of any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as semiconductor-based memory devices, flash memory, magnetic storage devices and systems, optical storage devices and systems, fixed storage, and removable storage. Computer-readable storage devices 125, 155, and 171 can be components for performing storage functions. Processors 120, 152, and 175 can be of any type suitable for the local technical environment and, by way of non-limiting example, can include one or more of general-purpose computers, special-purpose computers, microprocessors, digital signal processors (DSPs), and processors based on multi-core processor architectures. Processors 120, 152, and 175 can be used to perform functions as described herein and other functions to control, for example, Figure 6 Components of network equipment such as UE 110, gNB 170 and / or NCE / MME / SGW / UDM / PCF / AMM / SMF / LMF / LMC 190.

[0094] Note that, according to an exemplary embodiment of the present invention, Figure 6 The functions of any of the devices shown (e.g., UE 110 and / or gNB 170) can also be implemented by other network nodes, such as wireless or wired relay nodes (also known as Integrated Access and / or Backhaul (IAB) nodes). In the case of IAB, UE functions can be performed by the MT (Mobile Terminal) portion of the IAB node, and gNB functions can be performed by the DU (Data Unit) portion of the IAB node. These devices can be used at least via radio link 111 and / or via NCE / MME / SGW / UDM / PCF / AMM / SMF / LMF / LMC 190, as shown in the image. Figure 6 Link 199 in the middle to (multiple) other networks / Internet and linked to such Figure 6 UE 110 in the middle.

[0095] Typically, various embodiments of user equipment 110 may include, but are not limited to, cellular phones with wireless communication capabilities (such as smartphones, tablets, personal digital assistants (PDAs)), portable computers with wireless communication capabilities, image capture devices with wireless communication capabilities (such as digital cameras), gaming devices with wireless communication capabilities, music storage and playback devices with wireless communication capabilities, internet devices that allow wireless internet access and browsing, tablets with wireless communication capabilities, and portable units or terminals combining such functions.

[0096] The solution to the above problem can be summarized as follows:

[0097] The process used by the UE to determine the CORESET in which the PDCCH is monitored is based on one or more of the following, wherein these CORESETs may have different QCL-TypeD and can be used for PDCCH repetition operations (i.e., the same DCI is repeated via multiple SSSets associated with multiple CORESETs):

[0098] In one option (Option 1), if the first CORESET and the second CORESET are linked, then the first CORESET and the second CORESET based on the version 15 / 16 mechanism are selected for PDCCH monitoring. Specifically:

[0099] Because of the monitoring of the second QCL-TypeD (e.g., at the second panel of the UE), the monitoring of the second CORESET may occur. If a CORESET linked to the first CORESET has already been selected, it will be marked as the second CORESET.

[0100] Any CORESET that is not linked to the first CORESET (with any other QCL-TypeD besides the selected QCL-TypeD) will not be detected by the UE.

[0101] If a link exists between the first core set and the second core set, then both the first core set and the second core set are monitored simultaneously. Note that the link between the two core sets may come from two linked SS sets, each SS set corresponding to one core set, and / or

[0102] The monitoring can also be extended to monitor any other CORESET that already has a second QCL-TypeD configured in multiple CORESETs.

[0103] In addition, option 1 may include:

[0104] 1) The links of search space sets are configured by RRC (if PDCCH to the UE is supported). Each search space set is associated with a CORESET. Therefore, CORESET links (up to two CORESETs) can be derived. This is not a novel part of the invention, and

[0105] 2) In Option 1, we defined a rule to use the links between two CORESETs to find two QCL-TypeDs. In summary, we found the first QCL-TypeD and the CORESET associated with it. Then, we checked if there was a link within the CORESET with the first QCL-TypeD to another CORESET with a different QCL-TypeD. If so, we began monitoring for the second QCL-TypeD, in addition to the first QCL-TypeD.

[0106] *Note that some of the novelties seen in the options presented in this article are underlined and / or shown in bold.

[0107] The process for the UE to determine the CORESET in which the PDCCH is monitored is based on one or more of the following, wherein these CORESETs may have different QCL-TypeD and can be used for PDCCH repetition operations (i.e., the same DCI is repeated via multiple SSSets associated with multiple CORESETs).

[0108] In one version of option 1, If the first core set is linked to the second core set Then you can choose the first CORESET based on the 15th / 16th version mechanism, and The second core is used for PDCCH monitoring. . Specifically:

[0109] ο Due to monitoring of the second QCL-TypeD (For example, in the second panel of the UE), It may happen to the second core set Monitoring If a CORESET linked to the first CORESET has already been selected, it will be marked as the second CORESET.

[0110] ο A CORESET without a link to the first CORESET (having any other than the selected QCL-TypeD) Other QCL-TypeD) will not be detected by the UE. ,

[0111] If a link exists between the first core set and the second core set, then both the first core set and the second core set are monitored simultaneously. Note that the link between the two core sets may come from two linked SS sets, each SS set corresponding to one core set, and / or

[0112] ο The monitoring can also be extended to monitor any other CORESETs that already have a second QCL-TypeD configured. CORESET .

[0113] An example: A UE monitors two cells, each with three cores. Each core can have three QCL-TypeDs (#Q1, #Q2, #Q3). Assume that in cell 2, two cores are linked. The relationship between cores and QCL-TypeDs can be represented as:

[0114] CORESET#1_1: QCL#Q1

[0115] CORESET#1_2: QCL#Q3

[0116] CORESET#1_3: QCL#Q3

[0117] CORESET#2_1: QCL#Q1 (link)

[0118] CORESET#2_2: QCL#Q2 (link)

[0119] CORESET#2_3: QCL#Q2

[0120] Based on version 15, the UE can select CORESTE#1_1 as QCL-TypeD for monitoring, which represents QCL#Q1. Furthermore, based on version 15, the UE monitors CORESET#1_1 and CORESET#2_1 because they have the same... QCL-TypeD Through the link between CORESET#2_1 and CORESET#2_2, we also allow selection of CORESET#2_2. QCL-TypeD That is, QCL#Q2. After selection, the UE monitors all CORESETs of the second QCL-TypeD, meaning it can also monitor CORESETs#2_2 and #2_3.

[0121] In one option (Option 2), select the first and second CORESET based on the new mechanism (not based on version 15 / 16), where the new mechanism allows PDCCH to monitor the linked CORESET:

[0122] In other words, this option follows the current version 15 / 16 rules by modifying the CORESET through searching the SS set that always has links (instead of monitoring the lowest CSS index or the lowest USS index in the cell with the lowest index).

[0123] Priority is given for monitoring CORESET that allows repeated PDCCH operations, rather than based on the CSS / USS index.

[0124] If more than one cell has PDCCH repetition configured, then the CORESET of the link with the lower or higher index is selected from the cells.

[0125] The above new mechanism may only apply when PDCCH repetition is configured for the UE, and / or

[0126] If a CORESET with more than two links will have a SS set of links, then the CORESET with links having lower or higher indices (multiple) is selected. Alternatively, the CORESET with links having lower or higher indices corresponding to CSS / USS is selected.

[0127] In one option (Option 3), a second core set with a different QCL-TypeD from the first core set is selected, regardless of the linked SS set. In other words, monitoring of different QCL-TypeDs from different core sets is applied. Instead It is necessary to consider whether they are linked. The two sub-options are as follows:

[0128] In one sub-option, the first CORESET can be selected based on the 15th / 16th edition rules, and through... Only test Consider the CORESET associated with the linked SS set. The second core set is selected based on the extended version 15 / 16 rules, where the QCL-TypeD is different from that of the first core set, and the CSS / USSID is not associated with the first (selected) core set QCL-TypeD;

[0129] In one sub-option, the first CORESET can be selected based on the 15th / 16th edition rules, and Only in links SS Collection Select the second CORESET:

[0130] • If the first selected CORESET corresponds to (multiple) CSS sets (or (multiple) USS sets), then the second CORESET selection can be based on the 15th / 16th edition rules.

[0131] • If the first monitored core set corresponds to (multiple) USS sets (or (multiple) CSS sets), then the second core set (in the linked SS sets) can be selected from core sets linked to the first core set, and / or

[0132] If more than two links to a CORESET are selected as the second CORESET (based on the rules above), then the CORESET with the lower / higher index is selected. Alternatively, the CORESET with the higher / lower index corresponding to CSS / USS is selected.

[0133] In addition, option 3 attempts to cover selecting two from different cores. QCL-TypeD In scenarios where the selection can be defined as following general principles and not entirely dependent on the use case (e.g., PDCCH repetition, multiple DCI reception), it is not necessary to consider whether they are linked. For example, the first CORESET can be selected based on the version 15 / 16 rules, and the second CORESET, whose QCL-TypeD is different from that of the first CORESET, can be selected based on the extended version 15 / 16 rules.

[0134] In option 3, a second core set with a different QCL-TypeD from the first core set is selected using general principles, without considering the supported use cases. In other words, monitoring of different QCL-TypeDs from different core sets is applied, regardless of whether they are linked (or independent of use cases).

[0135] In one variant, the first CORESET can be selected based on the 15th / 16th edition rules, and a second CORESET with a different QCL-TypeD from the first CORESET can be selected based on the extended 15th / 16th edition rules by considering CORESETs that are not associated with the first (selected) CORESET QCL-TypeD.

[0136] Therefore, the gNB can select (multiple) CSS / USS sets and CORESET RRC configurations to ensure that the UE uses the defined principles to select the first QCL-TypeD and the second QCL-TypeD for PDCCH repetition.

[0137] In another variant, additional selection constraints can be defined on the UE side to support different use cases:

[0138] • To support PDCCH repetition, a second core set is selected based on the extended version 15 / 16 rules, considering only core sets associated with linked SS sets, where the QCL-TypeD differs from that of the first core set, and the CSS / USS ID is not associated with the QCL-TypeD of the first (selected) core set, and / or

[0139] • To support multiple DCI and multiple TRP operations, a second CORESET with a different QCL-TypeD than the QCL-TypeD of the first CORESET is selected based on the extended version 15 / 16 rules, considering CORESETs with different CORESETPoolIndex that are not associated with the first (selected) CORESET QCL-TypeD.

[0140] The following examples illustrate several options according to exemplary embodiments of the present invention.

[0141] Figure 2 An example of monitoring overlapping CORESETs with different QCL-TypeDs based on link-based methods in the case of PDCCH repetition, according to an exemplary embodiment of the present invention, is shown.

[0142] Figure 2 An example of using option 1 is depicted when monitoring the "priority" of two CORESETs (with two different QCL-TypeDs) based on their links.

[0143] like Figure 2 Step 210 is shown. The first CORESET is selected based on the version 15 / 16 mechanism. As... Figure 2 As shown in step 220. Determine if any candidate CORESET has a link to the first CORESET. If step 220 is "No", then as... Figure 2 As shown in step 225, it is not necessary to monitor the candidate CORESET. If step 220 is "yes", then as shown in step 230, consider marking the candidate CORESET as the second CORESET, and monitor both CORESETs simultaneously.

[0144] When the above version 15 / 16 rules are used for the first CORESET selection, the following procedure is adopted:

[0145] "The UE monitors PDCCH candidates during overlapping PDCCH monitoring times on one or more active DL BWPs in one or more cells, in multiple CORESETs with the same or different QCL-TypeD attributes."

[0146] • On the active DL BWP of one or more cells, the UE monitors the PDCCH only in the CORESET and in any other CORESET among multiple CORESETs having the same QCL-TypeD attribute as the CORESET.

[0147] • CORESET corresponds to the lowest-indexed CSS set in the lowest-indexed cell containing CSS, if any; otherwise, it corresponds to the lowest-indexed USS set in the lowest-indexed cell.

[0148] • During overlapping PDCCH monitoring, determine the lowest USS set index across all USS sets with at least one PDCCH candidate.

[0149] Figure 3 An example of monitoring overlapping CORESETs with different QCL-TypeDs based on SS sets linked in other SS sets, according to an exemplary embodiment of the present invention, is shown.

[0150] Figure 3 This describes an example of using Option 2 when monitoring the priority of two CORESETs (with two different QCL-TypeDs) to detect duplicate CSS sets of the two CORESETs based on modifications to the current version 15 / 16 rules. Therefore, monitoring CORESETs that allow PDCCH duplication will not be based on monitoring the lowest CSS / USS index, as implemented in version 15 / 16.

[0151] like Figure 3 As shown in step 310, determine whether the candidate has a linked SS set. If the answer to step 310 is no, then as Figure 3 As shown in step 315, it is not necessary to monitor (multiple) candidate CORESETs. If the answer to step 310 is affirmative, then as... Figure 3 As shown in step 320, (multiple) candidate CORESETs are marked as the first CORESET and the second CORESET.

[0152] Figure 4 An example of detecting overlapping CORESETs with different QCL-TypeDs by utilizing PDCCH repetition and a CSS / USS ID not associated with the first (selected) CORESET QCL-TypeD is shown according to an exemplary embodiment of the present invention.

[0153] Figure 4This describes an example of using option 3 (first sub-option) when monitoring the priority of two cores (with two different QCL-TypeDs) without considering linked SS sets, where only the CSS / USS ID not associated with the QCL-TypeD of the first selected core is chosen for the second core. For example, the first core would be selected based on version 15 / 16 rules, and the second core would be selected from cores associated with linked SS sets whose CSS / USS IDs are not associated with the QCL-TypeD of the first (selected) core.

[0154] like Figure 4 As shown in step 410. Determine if there are two different candidate CORESETs that are not linked to the SS set. If the answer to step 410 is no, then as Figure 4 As shown in step 415, monitoring of candidate CORESETs is not required. If the answer to step 410 is affirmative, then as... Figure 4 As shown in step 420, the first CORESET is selected based on the version 15 / 16 mechanism. For example... Figure 4 As shown in step 425, determine if a CSS / USS ID exists in the first CORESET CSS / USS ID. If the answer to step 425 is yes, then proceed as follows: Figure 4 As shown in step 430, monitoring of candidate CORESETs is not required. If the answer to step 425 is negative, then... Figure 4 As shown in step 435, consider marking the candidate CORESET as the second CORESET.

[0155] Figure 5 Example flowcharts are shown to illustrate UE operation considering two discussed options for PDCCH repetition in the case of multiple overlapping CORESETs with different QCL-TypeD.

[0156] Figure 5 A flowchart illustrating UE operation, according to an exemplary embodiment of the present invention, is shown, considering two discussed options for PDCCH repetition in the case of multiple overlapping CORESETs with different QCL-TypeDs.

[0157] like Figure 5 As shown in step 510, the UE receives two beams (two different QCL-TypeDs) on different panels, where the PDCCH repetition operation is repeatedly used for the M-TRP PDCCH to monitor multiple CORESETs with different QCL-TypeDs. Figure 5As shown in step 520 of option 1, based on the link from the second core set to the first core set already selected based on version 15 / 16, the UE prioritizes the selection of two core sets. For example... Figure 5 As shown in step 530 of option 2, based on the link from the second CORESET to the first CORESET selected based on the linked SS set, the UE prioritizes the selection of two CORESETs. Then as... Figure 5 As shown in step 535, the UE decodes the DCI (soft combination) while taking into account the two CORESET PDCCH candidates.

[0158] Figure 7 A method that can be performed by an apparatus according to an example embodiment of the present invention is shown.

[0159] Figure 7 It shows that it can be made by, but is not limited to, devices (e.g., such as...) Figure 6 The operations performed by devices such as eNB / gNB170. For example... Figure 7 As shown in step 710, the network devices of the communication network determine physical downlink control channel candidates for two or more control resource sets of the communication network to be monitored, wherein the two or more control resource sets use different QCL-TypeD. Then as... Figure 7 As shown in step 720, at least two control resource sets with different QCL-TypeD are selected from the two or more control resource sets for monitoring at least two physical downlink control channel candidates among the physical downlink control channel candidates.

[0160] According to the example embodiments described in the above paragraphs, the selection includes selecting at least two sets of control resources with different QCL-TypeDs that are repeatedly associated with the physical downlink control channel.

[0161] According to the example embodiments described in the preceding paragraphs, the two or more control resource sets include at least a first control resource set and at least one other control resource set.

[0162] According to the example embodiments described in the preceding paragraphs, the selection further includes: selecting a first control resource set and at least one other control resource set for monitoring based on a link between a first control resource set and at least one other control resource set in two or more control resource sets.

[0163] According to the example embodiments described in the preceding paragraphs, the link between the first control resource set and at least one other control resource set includes the search space sets of the first control resource set and at least one other control resource set being linked.

[0164] According to the example embodiments described in the preceding paragraphs, monitoring includes monitoring physical downlink control channel candidates for at least one other set of control resources associated with the second QCL-TypeD.

[0165] According to the example embodiment described in the above paragraphs, the monitoring is extended to monitor at least one other control resource set that has the same QCL-TypeD as the second QCL-TypeD.

[0166] According to the example embodiments described in the above paragraphs, monitoring is not performed on control resource sets that are not linked to the first control resource set in two or more control resource sets.

[0167] According to the example embodiments described in the preceding paragraphs, the selection of a control resource set includes selecting the control resource set with the lowest or highest index, based on the existence of more than two control resource sets with linked search space sets.

[0168] According to the example embodiments described in the above paragraphs, the priority is given for the set of control resources that allow monitoring to repeat the physical downlink control channel, rather than based on at least one of the public search space or UE-specific search space indexes.

[0169] According to the example embodiments described in the above paragraphs, where more than one cell is configured with repeated physical downlink control channels, the selection includes selecting a set of control resources for a link in the cell that has a lower or higher index.

[0170] According to the example embodiments described in the preceding paragraphs, monitoring includes monitoring different QCL-TypeDs from different control resource sets from two or more control resource sets, regardless of whether the different control resource sets are linked to each other.

[0171] According to the example embodiments described in the preceding paragraphs, the selection includes selecting a first control resource set having a first QCL-TypeD and selecting a second control resource set having a different QCL-TypeD based on a control resource set not associated with the first QCL-TypeD.

[0172] According to the example embodiments described in the above paragraphs, the use of restrictions is selected to support at least one of repeated or multiple transmission and reception point operations of the physical downlink control channel.

[0173] Based on the example embodiments described in the preceding paragraphs, the limitation is that control resource sets with different CORESET pool indices are associated with control resource set groups defined as supporting multiple downlink control information modes.

[0174] A stored procedure code (such as) Figure 6 Non-transient computer-readable medium containing computer program code 153 and / or selection module 150-2 (in the form of computer program code 153 and / or selection module 150-2). Figure 6 The program code is stored in (multiple) memory units 155, and the program code is processed by at least one processor (such as...). Figure 6 The processors 120 and / or selection modules 150-1) in the process execute to perform at least the operations described in the paragraphs above.

[0175] According to the exemplary embodiments of the present invention described above, there exists an apparatus comprising: components for determining physical downlink control channel candidates for two or more sets of control resources of a communication network to be monitored (e.g., ... Figure 6 One or more transceivers 160,(multiple) memories 155, computer program code 153 and / or selection module 150-2,(multiple) processors 120 and / or selection module 150-1), wherein the two or more control resource sets use different QCL-TypeDs; and components (such as...) for selecting at least two control resource sets with different QCL-TypeDs from the two or more control resource sets for monitoring at least two physical downlink control channel candidates among the physical downlink control channel candidates. Figure 6 One or more transceivers 160, (multiple) memories 155, computer program code 153 and / or selection module 150-2, and (multiple) processors 120 and / or selection module 150-1.

[0176] In an exemplary aspect of the invention according to the foregoing paragraphs, wherein at least the component for determining and selecting comprises a non-transient computer-readable medium [such as...] Figure 6 [Multiple] memory units 155 in the medium, the non-transient computer-readable medium is used with computer programs [such as...] Figure 6 The computer program is encoded by computer program code 153 and / or selection module 150-2, and the computer program is processed by at least one processor [e.g., Figure 6 The processor(s) 152 and / or selection module 150-1 in the middle are executable.

[0177] The advantages of the exemplary embodiments of the invention disclosed herein are considered to include:

[0178] • Extend the CORESET QCL-TypeD selection rule when using PDCCH repetition.

[0179] • Covers the 15th / 16th edition framework for monitoring multiple overlapping cores, and

[0180] • When the UE receives two different beams when two different panel beam variations are applied, a set of assumptions is used to identify the QCL-TypeD priority rule.

[0181] According to the example embodiments of the present invention disclosed in this application, the provided "circuit system" may include at least one or more or all of the following:

[0182] (a) Pure hardware circuit implementation (such as implementation only in analog and / or digital circuit systems);

[0183] (b) A combination of hardware circuitry and software, such as (if applicable):

[0184] (i) A combination of (multiple) analog and / or digital hardware circuits and software / firmware; and

[0185] (ii) Any portion of a hardware processor(s) having software (including a plurality of digital signal processors(s), software, and a plurality of memories(s), which work together to cause a device (such as a mobile phone or server) to perform various functions, such as functions or operations according to exemplary embodiments of the invention disclosed herein; and

[0186] (c) (Multiple) hardware circuits and / or (multiple) processors, such as (multiple) microprocessors or portions thereof, which require software (e.g., firmware) to operate, but may be absent when operation is not required.

[0187] According to exemplary embodiments of the present invention, there exists a sufficient circuit system for performing at least the novel operations disclosed herein, and such a "circuit system" as may be used herein refers to at least the following:

[0188] (a) Pure hardware circuit implementation (such as implementation only in analog and / or digital circuit systems); and

[0189] (b) Combinations of circuitry and software (and / or firmware), such as (if applicable): (i) combinations of (multiple) processors, or (ii) portions of (multiple) processors / software (including (multiple) digital signal processors), software, and (multiple) memories, which work together to cause a device (such as a mobile phone or server) to perform various functions; and

[0190] (c) Circuits that require software or firmware to function, such as (multiple) microprocessors or a portion thereof, even if the software or firmware does not actually exist.

[0191] This definition of "circuit system" applies to all uses of the term in this application, including in any claim. As another example, as used in this application, the term "circuit system" will also cover implementations of a processor (or processors) or a portion thereof and its accompanying software and / or firmware. For example, if applicable to a particular claim element, the term "circuit system" will also cover baseband integrated circuits or application processor integrated circuits for mobile phones, or similar integrated circuit devices in servers, cellular network devices, or other networks.

[0192] Generally, various embodiments can be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. For example, some aspects may be implemented in hardware, while others may be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device, but the invention is not limited thereto. Although various aspects of the invention may be illustrated and described as block diagrams, flowcharts, or using some other graphical representation, it is well understood that, by way of non-limiting example, the blocks, apparatuses, systems, techniques, or methods described herein may be implemented in hardware, software, firmware, dedicated circuitry or logic, general-purpose hardware or controllers or other computing devices, or some combination thereof.

[0193] Embodiments of the present invention can be practiced in various components such as integrated circuit modules. The design of integrated circuits is largely a highly automated process. Complex and powerful software tools can be used to transform logic-level designs into semiconductor circuit designs ready to be etched and formed on semiconductor substrates.

[0194] 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 being more preferred or advantageous than other embodiments. All embodiments described in this detailed description are exemplary embodiments provided to enable those skilled in the art to make or use the invention, and are not intended to limit the scope of the invention as defined by the claims.

[0195] The foregoing description provides a complete and informative description of the best methods and apparatus currently conceived by the inventors for carrying out the invention, by way of exemplary and non-limiting examples. However, various modifications and adjustments will become apparent to those skilled in the art when read in conjunction with the accompanying drawings and claims, given the foregoing description. Nevertheless, all such and similar modifications to the teachings of the invention will still fall within the scope of the invention.

[0196] It should be noted that the terms “connection,” “coupling,” or any variation thereof refer to any direct or indirect connection or coupling between two or more elements, and may encompass the presence of one or more intermediate elements between two elements that are “connected” or “coupled” together. The coupling or connection between elements can be physical, logical, or a combination thereof. As used herein, as several non-limiting and non-exhaustive examples, two elements may be considered “connected” or “coupled” together by means of one or more wires, cables, and / or printed electrical connections, and by means of electromagnetic energy (such as electromagnetic energy with wavelengths in the radio frequency region, microwave region, and optical (visible and invisible) region).

[0197] Furthermore, some features of the preferred embodiments of the invention can be used advantageously without the corresponding use of other features. Therefore, the above description should be considered merely as an illustration of the principles of the invention, and not as a limitation thereof.

Claims

1. An apparatus for communication, the apparatus comprising: Components for determining physical downlink control channel candidates for two or more control resource sets of a communication network to be monitored, wherein the two or more control resource sets use different quasi-co-location types QCL-TypeD associated with one or more spatial receiver parameters; as well as A component for determining whether there exists a control resource set with at least two links from the two or more control resource sets; In response to determining that there are no control resource sets with at least two links, a component for determining that the physical downlink control channel candidates of the two or more control resource sets are not monitored; In response to determining that at least two control resource sets exist, a component is selected from the control resource sets of the at least two links in a cell for monitoring, including a first control resource set and at least one other control resource set, wherein the selection is based on the fact that more than one cell is configured with repeated physical downlink control channels. The selection includes selecting the control resource set of the link in the cell with the lowest or highest index, and wherein... Based on the determination of a control resource set with more than two links, the selection includes selecting the control resource set with the lowest or highest index.

2. The apparatus of claim 1, wherein the selection comprises selecting two sets of control resources with different QCL-TypeDs that are repeatedly associated with the physical downlink control channel.

3. The apparatus of claim 2, wherein the two or more control resource sets include at least the first control resource set having a first QCL-TypeD and at least one other control resource set, and wherein the monitoring includes monitoring physical downlink control channel candidates of the at least one other control resource set associated with a second QCL-TypeD.

4. The apparatus of claim 3, wherein the monitoring is extended to monitor any control resource set in the at least one other control resource set that has the same QCL-TypeD as the second QCL-TypeD.

5. The apparatus of claim 1, wherein the monitoring is not performed on control resource sets in the two or more control resource sets that are not linked to the first control resource set.

6. The apparatus of claim 1, wherein a priority is given for a set of control resources that allow monitoring of repeated physical downlink control channels, the set of control resources that allow monitoring of repeated physical downlink control channels is not based on at least one of a common search space or a user equipment-specific search space index.

7. The apparatus of claim 1, wherein the selection comprises selecting the first control resource set having a first QCL-TypeD and selecting at least one other control resource set having a different QCL-TypeD based on a control resource set not associated with the first QCL-TypeD.

8. The apparatus of claim 1, wherein the selection includes: Use restrictions to support at least one of the following: repeated or multiple transmit and receive point operations on the physical downlink control channel.

9. The apparatus of claim 1, wherein the apparatus comprises or is included in a user equipment.

10. A method for communication, the method comprising: Determine physical downlink control channel candidates for two or more sets of control resources of a communication network to be monitored, wherein the two or more sets of control resources use different quasi-co-location types QCL-TypeD associated with one or more spatial receiver parameters; as well as Determine whether there exists a control resource set with at least two links from the two or more control resource sets; In response to determining that there are no control resource sets with at least two links, the physical downlink control channel candidates for the two or more control resource sets are determined not to be monitored; In response to determining that there are control resource sets for at least two links, a first control resource set and at least one other control resource set in the control resource sets of the at least two links in the cell are selected for monitoring, wherein the selection is based on the fact that more than one cell is configured with repeated physical downlink control channels, the selection includes selecting the control resource set of the link with the lowest or highest index in the cell, and wherein the selection is based on the determination of the control resource sets of more than two links, the selection includes selecting the control resource set of the link with the lowest or highest index.

11. The method of claim 10, wherein the selection comprises selecting two sets of control resources with different QCL-TypeDs that are repeatedly associated with the physical downlink control channel.

12. The method of claim 10 or 11, wherein the two or more control resource sets comprise at least the first control resource set having a first QCL-TypeD and at least one other control resource set, and wherein the monitoring comprises: The physical downlink control channel candidates of the at least one other control resource set associated with the second QCL-TypeD are monitored, and the monitoring is extended to monitor any control resource set in the at least one other control resource set that has the same QCL-TypeD as the second QCL-TypeD.

13. The method of claim 12, wherein a priority is given for a set of control resources that allow monitoring of repeated physical downlink control channels, the set of control resources that allow monitoring of repeated physical downlink control channels is not based on at least one of a common search space or a user equipment-specific search space index.

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