Techniques for limiting blind decoding of multiple transmit receive points based on multiple DCI

Abstract

The application relates to techniques for limiting blind decoding of multiple transmit receive points based on multiple DCI. Since multiple transmit receive point (TRP) communications may increase the number of physical downlink control channel (PDCCH) candidates without increasing the number of cells, new restrictions on multiple TRP communications may be defined. The UE may determine a PDCCH monitoring capability across all downlink serving cells, which may use multiplication factors to account for multi-TRP cells as well as carrier aggregation and dual connectivity. Further, the UE may determine a number limit of serving cells based on the capabilities and the configuration of the serving cells. The UE may determine, based on the number limit of serving cells, a total limit of PDCCH candidates and non-overlapping control channel elements (CCEs) to monitor in the slots of the cell group and a per-cell limit for single TRP cells and multiple TRP cells. Alternatively, these restrictions may be defined by a group of control resource sets (CORESET).

Description

[0001] This application is a divisional application of the patent application with application number 202080051111.9, PCT international application number PCT / US2020 / 042393, application date July 16, 2020, and invention name “Technology for limiting blind decoding of multiple transmission and reception points based on multiple DCI”.

[0002] This application claims priority to U.S. Provisional Application No. 62 / 876,572, filed on July 19, 2019, entitled “TECHNIQUES FOR LIMITING BLINDDECODING FOR MULTI-DCI BASED MULTI-TRANSMIT-RECEIVE POINTS,” and U.S. Patent Application No. 16 / 930,003, filed on July 15, 2020, entitled “TECHNIQUES FOR LIMITING BLIND DECODING FOR MULTI-DCI BASED MULTI-TRANSMIT-RECEIVE POINTS,” both of which are assigned to the assignee of this application and are incorporated herein by reference in their entirety. background Technical Field

[0004] The present disclosure relates generally to communication systems and, more particularly, to limiting control channel processing for blind decoding of multiple Transmission Reception Points (TRPs) based on multiple Downlink Control Information (DCI). introduction

[0006] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcast. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0007] These multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different wireless devices to communicate at city, country, region, and even global levels. An example telecommunication standard is 5G New Radio (NR). 5G NR is a part of the continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)) and other requirements. 5GNR includes services associated with enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low latency communication (URLLC). Some aspects of 5G NR can be based on 4G Long Term Evolution (LTE) standards. There is a need for further improvements to 5G NR technology. These improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies. Overview

[0009] A brief summary of one or more aspects is given below to provide a basic understanding of such aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be presented later.

[0010] In one aspect of the present disclosure, methods, non-transitory computer-readable media, and apparatus (e.g., user equipment (UE)) are provided. A wireless communication method may include determining, by a UE, whether to signal a value representing a physical downlink control channel (PDCCH) monitoring capability across all downlink serving cells based at least in part on a multiplication factor for a serving cell with two control resource sets (CORESET) groups. The method may include receiving, by the UE, a configuration of a serving cell, the configuration indicating the number of configured downlink serving cells without CORESET grouping or with one CORESET group and the number of configured downlink serving cells with two CORESET groups; determining a limit on the number of serving cells based on (i) the configuration and the multiplication factor in response to determining that a value representing the PDCCH monitoring capability is not to be signaled, or determining a limit on the number of serving cells based on (ii) a value representing the PDCCH monitoring capability in response to determining that a value representing the PDCCH monitoring capability is to be signaled. The method may include determining, by the UE, a total limit of PDCCH candidates and non-overlapping control channel elements (CCEs) to be monitored in a time slot of a cell group based on the number limit of the serving cells and a per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot of each cell scheduled in cells without CORESET grouping or with one CORESET group and cells with two CORESET groups. The method may include receiving a downlink control channel in a time slot by performing blind decoding operations on the CCEs up to the total limit and up to the per-cell limit.

[0011] In the above method, receiving the downlink control channel may further include, for a primary cell, deducting blind detection and control channel elements corresponding to the common search space set from a per-cell restriction for the primary cell. The method may include decoding the UE-specific search space starting from the lowest index and deducting the number of blind detections and CCEs used for decoding for each index from the per-cell restriction for the primary cell. The method may include stopping decoding when the number of blind detection or control channel elements configured for the next index is greater than the remaining number of PDCCH candidates or non-overlapping CCEs in the per-cell restriction for the primary cell.

[0012] In one aspect, the per-cell limit for a cell having multiple TRPs includes a per-CORESET group limit. The per-CORESET group limit may be equal to the per-cell limit for a cell having two CORESET groups divided by the multiplication factor or may be equal to the per-cell limit for a cell having no CORESET grouping or having one CORESET group.

[0013] In an aspect, determining by the UE whether to signal a value representing the PDCCH monitoring capability across all downlink serving cells may include determining to signal the value when the UE is capable of receiving from a first number of cells without CORESET grouping or with one CORESET group and a second number of cells with two CORESET groups and the product of the first number plus the multiplication factor multiplied by the second number is greater than a threshold. The method may further include signaling a value representing the PDCCH monitoring capability across all downlink serving cells having a value that is less than or equal to the product of the first number of cells without CORESET grouping or with one CORESET group plus the multiplication factor multiplied by the second number of cells with two CORESET groups.

[0014] In one aspect, determining, by the UE, the limit on the number of serving cells based on the configuration and the multiplication factor may include determining the limit on the number of serving cells as the product of the number of configured downlink serving cells without CORESET grouping or with one CORESET group plus the multiplication factor multiplied by the number of configured downlink serving cells with two CORESET groups.

[0015] In one aspect, determining by the UE an overall limit on a cell group and a per-cell limit on each scheduled cell among cells without CORESET grouping or with one CORESET group and cells with two CORESET groups based on the number limit on the serving cells may include: determining that the product of the number of configured downlink serving cells without CORESET grouping or with one CORESET group plus a multiplication factor multiplied by the number of configured downlink serving cells with multiple TRPs is less than or equal to the number limit on the serving cells; determining the per-cell limit on cells without CORESET grouping or with one CORESET group as a value of a subcarrier spacing (SCS) of the serving cells without CORESET grouping or with one CORESET group; and determining the per-cell limit on multi-TRP cells as a product of the multiplication factor multiplied by a value of the SCS of the serving cells without CORESET grouping or with one CORESET group.

[0016] In one aspect, determining, by the UE, the total limit and the per-cell limit for cells without CORESET grouping or with one CORESET group and for cells with two CORESET groups based on the number limit of serving cells may include: determining that the product of the number of configured downlink serving cells without CORESET grouping or with one CORESET group plus a multiplication factor multiplied by the number of configured downlink serving cells with two CORESET groups is greater than the number limit of serving cells; and determining the total limit for cell groups with SCS as the floor of a value calculated by multiplying the number limit of serving cells by the multiplication factor. The value of the SCS for the serving cells without CORESET grouping or with one CORESET group is multiplied by the ratio of the following two values: the product of the number of configured downlink serving cells without CORESET grouping or with one CORESET group for the SCS plus a multiplication factor multiplied by the number of configured downlink serving cells with two CORESET groups for the SCS and the total number of configured downlink serving cells without CORESET grouping or with one CORESET group for the cell group plus a multiplication factor multiplied by the total number of configured downlink serving cells with two CORESET groups for the cell group. Determining by the UE the total limit and the per-cell limit for cells with no CORESET grouping or with one CORESET group and for cells with two CORESET groups based on the number limit of the serving cells may include: determining the per-cell limit for cells with no CORESET grouping or with one CORESET group as the minimum of the following values: the value of the SCS of the serving cell with no CORESET grouping or with one CORESET group and the total limit for the SCS cell group; and determining the per-cell limit for cells with two CORESET groups as the minimum of the following values: the product of a multiplication factor multiplied by the value of the SCS of the serving cell with no CORESET grouping or with one CORESET group and the total limit for the SCS cell group.

[0017] On the one hand, in a case where a UE determines not to signal a value representing a PDCCH monitoring capability, and wherein the UE has dual connectivity capability, the UE reports a first value representing the PDCCH monitoring capability for a primary cell group (MCG) and a second value representing the PDCCH monitoring capability for a secondary cell group (SCG), wherein a sum of the first value and the second value is greater than or equal to a first number of cells without CORESET grouping or with one CORESET group plus a multiplication factor multiplied by a second number of cells with two CORESET groups. The configuration may include a configured value representing the PDCCH monitoring capability for the MCG and a configured value representing the PDCCH monitoring capability for the SCG, the sum of the configured value representing the PDCCH monitoring capability for the MCG and the configured value representing the PDCCH monitoring capability for the SCG may be less than or equal to a first configured number of cellular cells without CORESET grouping or with one CORESET group plus a multiplication factor multiplied by a second configured number of cellular cells with two CORESET groups, and the number limit of serving cellular cells may be based on the configured value representing the PDCCH monitoring capability for the MCG and the configured value representing the PDCCH monitoring capability for the SCG.

[0018] Alternatively, in the case where the UE determines that a value representing the PDCCH monitoring capability across all downlink serving cells is to be signaled, and in the case where the UE is capable of dual connectivity, the UE may report a first value representing the PDCCH monitoring capability for an MCG and a second value representing the PDCCH monitoring capability for a secondary cell group (SCG), wherein the sum of the first value and the second value is greater than or equal to the value representing the PDCCH monitoring capability across all downlink serving cells. The configuration may include a configured value representing the PDCCH monitoring capability for the MCG and a configured value representing the PDCCH monitoring capability for the SCG, wherein the sum of the configured value representing the PDCCH monitoring capability for the MCG and the configured value representing the PDCCH monitoring capability for the SCG is less than or equal to the value representing the PDCCH monitoring capability across all downlink serving cells, and the number of serving cells is limited based on the configured value representing the PDCCH monitoring capability for the MCG and the configured value representing the PDCCH monitoring capability for the SCG.

[0019] In an alternative to the above NR-DC, determining, by the UE, the overall restriction on blind decoding operations and control channel elements for a group of cells may include determining the overall restriction on blind decoding operations and control channel elements separately for the MCG and SCG.

[0020] In another aspect, the present disclosure provides a method, a non-transitory computer-readable medium, and an apparatus (e.g., a UE) for wireless communication. The wireless communication method may include determining, by the UE, whether to signal a first value representing a physical downlink control channel (PDCCH) monitoring capability across all downlink serving cells for a first CORESET group and a second value representing a PDCCH monitoring capability across all downlink serving cells for a second CORESET group. The method may include receiving, by the UE, a configuration of serving cells, the configuration indicating the number of configured downlink serving cells for the first CORESET group and the number of configured downlink serving cells for the second CORESET group. The method may include determining, by the UE, a limit on the number of serving cells for the first CORESET group based on the configuration or the first value and determining a limit on the number of serving cells for the second CORESET group based on the configuration or the second value. The method may include determining, by the UE, a first total limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a group of cells of the first CORESET group based on a limit on the number of serving cells for the first CORESET group and determining a first per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each scheduled cell of the first CORESET group based on the limit on the number of serving cells for the first CORESET group. The method may include determining a second total limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a group of cells of the second CORESET group based on a number of serving cells for the second CORESET group and determining a second per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each scheduled cell of the second CORESET group based on the number of serving cells for the second CORESET group. The method may include receiving a downlink control channel in a time slot by performing blind decoding operations on CCEs up to a first overall limit and up to a first per-cell limit for a first CORESET group and performing blind decoding operations on CCEs up to a second overall limit and up to a second per-cell limit for a second CORESET group.

[0021] In one aspect, receiving a downlink control channel may further include, for at least a first CORESET group for a primary cell: deducting blind detection and control channel elements corresponding to a common search space set from a first per-cell restriction for the primary cell; decoding the UE-specific search space starting from a lowest index and deducting the number of blind detections and CCEs used to decode each index from the per-cell restriction for the primary cell; and stopping decoding when the number of blind detection or control channel elements configured for the next index is greater than the remaining number of PDCCH candidates or non-overlapping CCEs in the per-cell restriction for the primary cell.

[0022] On the other hand, determining by the UE whether to signal the first value and the second value may include signaling the first value when the UE is capable of supporting more than a threshold number of downlink serving cellular cells in which the first CORESET group is configured and signaling the second value when the UE is capable of supporting more than the threshold number of downlink serving cellular cells in which the second CORESET group is configured.

[0023] In another aspect, determining, by the UE, whether to signal the first value and the second value includes signaling both the first value and the second value when a sum of a number of serving cells configurable with the first CORESET group plus a number of serving cells configurable with the second CORESET group is greater than a threshold.

[0024] On the other hand, determining, by the UE based on the configuration, a number of serving cells for a first CORESET group and a number of serving cells for a second CORESET group includes, for each CORESET group, determining a number of configured downlink cells in which a corresponding CORESET having a higher layer index corresponding to the corresponding CORESET group is configured.

[0025] On the other hand, in a case where the UE determines not to signal the first value and the second value, and in a case where the UE has dual connectivity capability, the UE may report a first value representing the PDCCH monitoring capability and a second value representing the PDCCH monitoring capability for the MCG of each of the first CORESET and the second CORESET, as well as the first value and the second value for the SCG, wherein the sum of the first value and the second value is greater than or equal to the maximum number of downlink cellular cells on both the MCG and the SCG for the corresponding CORESET.

[0026] On the other hand, the configuration includes a configured value representing the PDCCH monitoring capability for the MCG and a configured value representing the PDCCH monitoring capability for the SCG for each of the first CORESET and the second CORESET group, and the number of service cellular cells determined by the UE for the corresponding CORESET group can be based on the configured value representing the PDCCH monitoring capability for the MCG and the configured value representing the PDCCH monitoring capability for the SCG, and the higher layer index indicates the corresponding CORESET group.

[0027] In one aspect, determining by the UE an overall limit for a cell group and a per-cell limit for a first CORESET group may include determining an overall limit and a per-cell limit separately for MCGs and SCGs for the first CORESET group, and determining by the UE an overall limit and a per-cell limit for each scheduled cell for a second CORESET group may include determining an overall limit separately for MCGs and SCGs for the second CORESET group.

[0028] In another aspect, an apparatus for wireless communication may include a memory; and at least one processor coupled to the memory. The at least one processor may be configured to determine whether to signal a value representing a PDCCH monitoring capability across all downlink serving cells based at least in part on a multiplication factor, a number of serving cells with two CORESET groups, and a number of serving cells without CORESET grouping or with one CORESET group. The at least one processor may be configured to receive a configuration of serving cells, the configuration indicating a number of configured downlink serving cells without CORESET grouping or with one CORESET group, and a number of configured downlink serving cells with two CORESET groups. The at least one processor may be configured to determine a limit on the number of serving cells based on the configuration and the multiplication factor when the value representing the PDCCH monitoring capability is not signaled, and to determine a limit on the number of serving cells based on the value representing the PDCCH monitoring capability when it is signaled. The at least one processor may be configured to determine an overall limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot of a cell group based on the number limit of the serving cells and a per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot of each cell scheduled in cells without CORESET grouping or with one CORESET group and cells with two CORESET groups. The at least one processor may be configured to receive a downlink control channel in a time slot by performing blind decoding operations on CCEs up to the overall limit and up to the per-cell limit.

[0029] In another aspect, the present disclosure provides a UE for wireless communication, including means for determining whether to signal a value representing a PDCCH monitoring capability across all downlink serving cells based at least in part on a multiplication factor, a number of serving cells with two CORESET groups, and a number of serving cells without CORESET grouping or with one CORESET group. The UE may include means for receiving a configuration of serving cells, the configuration indicating a number of configured downlink serving cells without CORESET grouping or with one CORESET group, and a number of configured downlink serving cells with two CORESET groups. The UE may include means for determining a limit on the number of serving cells based on the configuration and the multiplication factor when the value representing the PDCCH monitoring capability is not signaled, and determining a limit on the number of serving cells based on the value representing the PDCCH monitoring capability when it is signaled. The UE may include means for determining an overall limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot of a cell group based on the number limit of the serving cells and a per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot of each cell scheduled in cells without CORESET grouping or with one CORESET group and cells with two CORESET groups. The UE may include means for receiving a downlink control channel in a time slot by performing blind decoding operations on CCEs up to the overall limit and up to the per-cell limit.

[0030] In another aspect, the present disclosure provides a non-transitory computer-readable medium storing computer executable code. The code, when executed by a processor, causes the processor to: determine, by a UE, at least in part based on a multiplication factor, the number of serving cells with two CORESET groups, and the number of serving cells without CORESET grouping or with one CORESET group, whether to signal a value representing a PDCCH monitoring capability across all downlink serving cells. The code, when executed by the processor, causes the processor to: receive, by the UE, a configuration of serving cells, the configuration indicating the number of configured downlink serving cells without CORESET grouping or with one CORESET group, and the number of configured downlink serving cells with two CORESET groups. The code, when executed by the processor, causes the processor to: determine, by the UE, a limit on the number of serving cells based on the configuration and the multiplication factor when the value representing the PDCCH monitoring capability is not signaled, and determine the limit on the number of serving cells based on the value representing the PDCCH monitoring capability when it is signaled. The code, when executed by a processor, causes the processor to: determine, by a UE, a total limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot of a cell group based on the number limit of the serving cell and a per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot of each cell scheduled in cells without CORESET grouping or with one CORESET group and cells with two CORESET groups. The code, when executed by the processor, causes the processor to: receive, by the UE, a downlink control channel in a time slot by performing blind decoding operations on CCEs up to the total limit and up to the per-cell limit.

[0031] In another aspect, the present disclosure provides a UE for wireless communication, comprising a memory; and at least one processor coupled to the memory. The at least one processor may be configured to determine whether to signal a first value representing a PDCCH monitoring capability across all downlink serving cells for a first CORESET group and a second value representing a PDCCH monitoring capability across all downlink serving cells for a second CORESET group. The at least one processor may be configured to receive a configuration of serving cells, the configuration indicating the number of configured downlink serving cells for the first CORESET group and the number of configured downlink serving cells for the second CORESET group. The at least one processor may be configured to determine a limit on the number of serving cells for the first CORESET group based on the configuration or the first value and determine a limit on the number of serving cells for the second CORESET group based on the configuration or the second value. The at least one processor may be configured to determine a first aggregate limit of PDCCH candidates and non-overlapping control channel elements (CCEs) to be monitored in a time slot for a group of cells of the first CORESET group based on a limit on the number of serving cells for the first CORESET group and to determine a first per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each scheduled cell of the first CORESET group based on a limit on the number of serving cells for the first CORESET group. The at least one processor may be configured to determine a second aggregate limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a group of cells of the second CORESET group based on a limit on the number of serving cells for the second CORESET group and to determine a second per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each scheduled cell of the second CORESET group based on a limit on the number of serving cells for the second CORESET group. The at least one processor may be configured to receive a downlink control channel in a time slot by performing blind decoding operations on CCEs up to a first overall limit and up to a first per-cell limit for a first CORESET group and performing blind decoding operations on CCEs up to a second overall limit and up to a second per-cell limit for a second CORESET group.

[0032] In one aspect, the present disclosure provides a UE for wireless communication, including means for determining whether to signal a first value representing a PDCCH monitoring capability across all downlink serving cells for a first CORESET group and a second value representing a PDCCH monitoring capability across all downlink serving cells for a second CORESET group. The UE may include means for receiving a configuration of serving cells, the configuration indicating a number of configured downlink serving cells for the first CORESET group and a number of configured downlink serving cells for the second CORESET group. The UE may include means for determining a limit on the number of serving cells for the first CORESET group based on the configuration or the first value and determining a limit on the number of serving cells for the second CORESET group based on the configuration or the second value. The UE may include means for determining a first aggregate limit of PDCCH candidates and non-overlapping control channel elements (CCEs) to be monitored in a time slot for a group of cells of the first CORESET group based on a limit on the number of serving cells for the first CORESET group and determining a first per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each scheduled cell of the first CORESET group based on a limit on the number of serving cells for the first CORESET group. The UE may include means for determining a second aggregate limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a group of cells of the second CORESET group based on a limit on the number of serving cells for the second CORESET group and determining a second per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each scheduled cell of the second CORESET group based on a limit on the number of serving cells for the second CORESET group. The UE may include means for receiving a downlink control channel in a time slot by performing blind decoding operations on CCEs up to a first overall limit and up to a first per-cell limit for a first CORESET group and performing blind decoding operations on CCEs up to a second overall limit and up to a second per-cell limit for a second CORESET group.

[0033] In one aspect, the present disclosure provides a non-transitory computer-readable medium storing computer executable code. When the code is executed by a processor, the processor is caused to: determine, by a UE, whether to signal a first value indicating a PDCCH monitoring capability across all downlink serving cells for a first CORESET group and a second value indicating a PDCCH monitoring capability across all downlink serving cells for a second CORESET group. When the code is executed by the processor, the processor is caused to: receive, by the UE, a configuration of serving cells, the configuration indicating the number of configured downlink serving cells for the first CORESET group and the number of configured downlink serving cells for the second CORESET group. When the code is executed by the processor, the processor is caused to: determine, by the UE, a limit on the number of serving cells for the first CORESET group based on the configuration or the first value and determine a limit on the number of serving cells for the second CORESET group based on the configuration or the second value. The code, when executed by a processor, causes the processor to: determine, by a UE, a first aggregate limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a cell group of a first CORESET group based on a limit on the number of serving cells for the first CORESET group and determine, based on the limit on the number of serving cells for the first CORESET group, a first per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each scheduled cell of the first CORESET group. The code, when executed by the processor, causes the processor to: determine, by the UE, a second aggregate limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a cell group of a second CORESET group based on a limit on the number of serving cells for the second CORESET group and determine, based on the limit on the number of serving cells for the second CORESET group, a second per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each scheduled cell of the second CORESET group. The code, when executed by a processor, causes the processor to: receive, by a UE, a downlink control channel in a time slot by performing blind decoding operations on CCEs for a first CORESET group up to a first overall limit and up to a first per-cell limit and performing blind decoding operations on CCEs for a second CORESET group up to a second overall limit and up to a second per-cell limit.

[0034] To achieve the foregoing and related ends, the one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and drawings set forth in detail certain illustrative features of the one or more aspects. However, these features are merely indicative of several of the various ways in which the principles of the various aspects may be employed, and this description is intended to cover all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a diagram illustrating an example of a wireless communication system and access network in accordance with certain aspects of the present specification.

[0037] Figure 2A is a diagram illustrating an example of a first frame according to certain aspects of the present specification.

[0038] Figure 2B is a diagram illustrating an example of DL channels within a subframe in accordance with certain aspects of the present disclosure.

[0039] Figure 2C is a diagram illustrating an example of a second frame according to certain aspects of the present specification.

[0040] Figure 2D is a diagram illustrating an example of a subframe in accordance with certain aspects of the present specification.

[0041] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network in accordance with certain aspects of the present specification.

[0042] Figure 4 is a diagram illustrating an example configuration of a serving cell for a UE in accordance with certain aspects of the present specification.

[0043] Figure 5 is a message diagram including communications and processes performed by a UE and a base station for determining PDCCH reception restrictions in accordance with certain aspects of the present disclosure.

[0044] Figure 6 is a flow chart of a first example method of wireless communications based on multiplication factor based PDCCH decoding restrictions in accordance with certain aspects of the present disclosure.

[0045] Figure 7 is a flow chart of an example method for applying PDCCH restriction for oversubscription scenarios in accordance with certain aspects of the present description.

[0046] Figure 8 is a flow chart of an example methodology for determining PDCCH decoding restrictions based on a restriction on the number of cells using a multiplication factor in accordance with certain aspects of the present disclosure.

[0047] Fig. 9 is a flow chart of a second example method for wireless communications based on PDCCH decoding restrictions for each CORESET group in accordance with certain aspects of the present disclosure.

[0048] Fig.10 According to certain aspects of this specification Figure 1A schematic diagram of example components of a UE.

[0049] Fig.11 According to certain aspects of this specification Figure 1 A schematic diagram of example components of a base station. Detailed Description

[0051] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. This detailed description includes specific details to provide a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid diluting such concepts. Although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar fields, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0052] The access network may utilize multiple transmit reception points (TRPs) for a single cell. In some deployments, separate downlink control information (DCI) may be used to schedule downlink transmissions from each TRP. For example, in the case of two TRPs, a first DCI transmitted from a first TRP may schedule a first physical downlink shared channel (PDSCH) transmitted from the first TRP, and a second DCI transmitted from a second TRP may schedule a second PDSCH transmitted from a second TRP. The use of multiple TRPs may be defined for a specific serving cell so that one or more cells may be configured with multiple TRPs, while other serving cells may be configured with a single TRP. Multiple TRPs may operate in the same active bandwidth portion (BWP) with the same subcarrier spacing (SCS). In order to determine PDSCH transmission, the UE may monitor a PDCCH candidate set in one or more control resource sets (CORESETs). Each CORESET may include multiple control channel elements (CCEs) that define a search space set. A non-overlapping CCE may refer to a unique CCE that does not use the same time domain and frequency domain resources as another CCE. The search space may include a common search space (CSS) and a UE-specific search space (USS). Monitoring a PDCCH candidate set in one or more CORESETs may be referred to as blind decoding because the UE cannot know which DCI format is being received and may decode each PDCCH candidate according to the monitored DCI format.

[0053] The utilization of multiple TRPs and multiple DCIs may increase the resources required for PDCCH decoding. In one aspect, the maximum number of CORESETs may be increased (e.g., to 5 CORESETs) beyond Release 15 of 5G-NR to accommodate the additional DCI. In addition, higher layer signaling may indicate an index by CORESET, which may group the CORESETs based on the TRP. A serving cell configured with two CORESET groups may be referred to as a multiple TRP cell or a multi-TRP cell. A serving cell that is not configured with CORESET grouping or is configured with one CORESET group may be referred to as a single TRP cell. However, in general, the use of multiple TRPs may be transparent to the UE.

[0054] PDCCH reception may be subject to various limitations based on UE capabilities. Since the wireless device employs a blind detection algorithm for downlink control channel decoding, a priori information on the maximum number of downlink control channels transmitted from multiple TRPs for detection may be used to reduce the downlink control channel search time. When multiple TRPs are configured with each scheduling data packet, the UE may stop blind decoding when the UE reaches a defined limit on the number of PDCCH candidates or non-overlapping CCEs. Otherwise (e.g., if there is no defined limit for the UE), the UE may perform blind decoding of all possibilities for downlink control channel candidates for one or more search spaces. Conventionally, UE decoding capabilities have been based on the number of cellular cells.

[0055] Since multi-TRP communication can increase the number of PDCCH candidates without increasing the number of cells, new restrictions on multi-TRP communication can be defined. For example, the PDCCH monitoring capability across all downlink serving cells can use a multiplication factor to account for multi-TRP cells as well as carrier aggregation and dual connectivity. In addition, restrictions determined by the network and UE based on capabilities and configuration can use a multiplication factor to account for multi-TRP cells as well as carrier aggregation and dual connectivity. Finally, oversubscription procedures for primary cells that are not configured with restrictions can define UE decoding operations.

[0056] In one aspect, in a first implementation, a UE may determine whether to signal a value representing a PDCCH monitoring capability across all downlink serving cells based on a multiplication factor (r) for serving cells with multiple transmit receive points (TRPs) compared to serving cells with a single TRP. The UE may receive a configuration of a serving cell indicating the number of configured downlink serving cells with a single TRP and the number of configured downlink serving cells with multiple TRPs. The UE may determine a number limit (Ncap) of serving cells based on the configuration and the multiplication factor when the value is not signaled or determine a number limit (Ncap) of serving cells based on the value when signaled. The UE may determine a total limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot of a cell group and a per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot of each cell scheduled in a single TRP cell and a multi-TRP cell based on the Ncap. The UE may receive the downlink control channel in a timeslot by performing blind decoding operations on the CCEs up to the total limit and up to the per-cell limit.

[0057] On the other hand, for a second implementation, the UE may determine whether to signal a first value representing a PDCCH monitoring capability across all downlink serving cells for a first CORESET group and a second value representing a PDCCH monitoring capability across all downlink serving cells for a second CORESET group. The UE may receive a configuration of serving cells, the configuration indicating the number of configured downlink serving cells for the first CORESET group and the number of configured downlink serving cells for the second CORESET group. The UE may determine a limit on the number of serving cells for the first CORESET group (Ncap0) based on the configuration or the first value and determine a limit on the number of serving cells for the second CORESET group (Ncap1) based on the configuration or the second value. The UE may determine a first total limit on PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a cell group for the first CORESET group based on Ncap0 and determine a first per-cell limit on PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each cell scheduled for the first CORESET group based on Ncap0. The UE may determine a second overall limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a cell group of a second CORESET group based on Ncap1 and determine a second per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each scheduled cell of the second CORESET group based on Ncap1. The UE may receive a downlink control channel in a time slot by performing blind decoding operations on CCEs up to the first overall limit and up to the first per-cell limit for the first CORESET group and performing blind decoding operations on CCEs up to the second overall limit and up to the second per-cell limit for the second CORESET group.

[0058] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0059] As an example, an element, or any part of an element, or any combination of elements may be implemented as a "processing system" including one or more processors. Examples of processors include: microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout this disclosure. One or more processors in a processing system may execute software. Software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether it is described in software, firmware, middleware, microcode, hardware description languages, or other terms.

[0060] Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, these functions may be stored or encoded on a computer-readable medium as one or more instructions or codes. Computer-readable media include computer storage media that may also be referred to as non-transient computer-readable media. The term non-transient computer-readable media excludes transient signals. Storage media may be any available medium that can be accessed by a computer. As an example and not limitation, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, a combination of computer-readable media of the above types, or any other medium that can be used to store computer-accessible instructions or data structure forms of computer executable code.

[0061] Figure 1 1 is a diagram illustrating an example of a wireless communication system and access network 100 in which a restriction on blind decoding of a search space is implemented. The wireless communication system (also referred to as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and another core network (e.g., a 5G core (5GC) 190). The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). A macro cell includes a base station. A small cell includes a femto cell, a pico cell, and a micro cell.

[0062] In an aspect, one or more of the UEs 104 may include a PDCCH restriction component 140 for determining a limit on the number of PDCCH candidates and / or a limit on the number of non-overlapping CCEs to be used for blind decoding of a search space. The PDCCH restriction component 140 may include a capability component 141 that signals zero or more UE capabilities related to PDCCH reception, a configuration component 142 that receives a cell configuration for an access network 100 including one or more serving cells (e.g., a base station 102), an Ncap component 143 that determines a limit on the number of serving cells (Ncap), a restriction component 144 that determines a limit on the number of PDCCH candidates and / or a limit on the number of non-overlapping CCEs based on the Ncap, and a decoding component 145 that performs blind decoding operations on PDCCH candidates on CCEs up to these limits.

[0063] In a first implementation, the PDCCH restriction component 140 may define a restriction based on the number of serving cells, but may use a multiplication factor (r) to increase the weight of multi-TRP cells. For a configuration with a maximum of two TRPs corresponding to two CORESET groups in a given serving cell, the value of r may be between 1 and 2 (inclusive). For more than two TRP / CORESET groups, the conditions may be different (e.g., the value of r may be larger). The capability component 141 may determine whether to signal a value (X) representing the PDCCH monitoring capability across all downlink serving cells based on the multiplication factor (r) for a serving cell with multiple transmit reception points (TRPs) compared to a serving cell with a single TRP. The configuration component 142 may receive a configuration of a serving cell indicating the number of configured downlink serving cells with a single TRP (a) and the number of configured downlink serving cells with multiple TRPs (b). The Ncap component 143 may determine a limit on the number of serving cells (Ncap) based on the configuration and the multiplication factor when the value is not signaled or determine a limit on the number of serving cells (Ncap) based on the value when signaled. The restriction component 144 may determine a total limit on PDCCH candidates and non-overlapping control channel elements (CCEs) to be monitored in a time slot of a cell group and a per-cell limit on PDCCH candidates and non-overlapping CCEs to be monitored in a time slot of each scheduled cell in a single-TRP cell and a multi-TRP cell based on the Ncap. The decoding component 145 may receive a downlink control channel within a time slot by performing blind decoding operations on the CCEs up to the total limit and up to the per-cell limit.

[0064] In a second implementation, the PDCCH restriction component 140 may define a per-CORESET group restriction across all downlink cells. The capability component 141 may determine whether to signal a first value (X0) representing a PDCCH monitoring capability across all downlink serving cells for a first CORESET group and a second value (X1) representing a PDCCH monitoring capability across all downlink serving cells for a second CORESET group. The configuration component 142 may receive a configuration of serving cells, the configuration indicating the number of configured downlink serving cells for the first CORESET group and the number of configured downlink serving cells for the second CORESET group. The Ncap component 143 may determine a limit on the number of serving cells for the first CORESET group (Ncap0) based on the configuration or the first value (X0) and determine a limit on the number of serving cells for the second CORESET group (Ncap1) based on the configuration or the second value (X1). The limiting component 144 may determine a first overall limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a cell group of a first CORESET group based on Ncap0 and a first per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each cell scheduled for the first CORESET group based on Ncap0. The limiting component 144 may also determine a second overall limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a cell group of a second CORESET group based on Ncap1 and a second per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each cell scheduled for the second CORESET group based on Ncap1. The decoding component 145 may receive a downlink control channel in a time slot by performing blind decoding operations on CCEs for the first CORESET group up to the first overall limit and up to the first per-cell limit and performing blind decoding operations on CCEs for the second CORESET group up to the second overall limit and up to the second per-cell limit.

[0065] In an aspect, one or more of the base stations 102 may include a network PDCCH restriction component 198 that may operate in conjunction with the PDCCH restriction component 140 to determine the restrictions discussed above. Specifically, the network PDCCH restriction component 198 may receive any capabilities signaled by the UE 104 and may transmit the configuration of the serving cell. The network PDCCH restriction component 198 may determine Ncap, the total restriction, and the per-cell restriction in the same manner as discussed above for the UE 104.

[0066] Base stations 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with EPC 160 via a backhaul link 132 (e.g., an S1 interface). Base stations 102 configured for 5G NR (collectively referred to as Next Generation RAN (NG-RAN)) may interface with core network 190 via a backhaul link 184. Base stations 102 may perform one or more of the following functions, among other functions: delivery of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment tracking, RAN information management (RIM), paging, positioning, and delivery of alert messages. Base stations 102 may communicate with each other over a backhaul link 134 (eg, an X2 interface) directly or indirectly (eg, through EPC 160 or core network 190). Backhaul link 134 may be wired or wireless.

[0067] Base stations 102 may communicate wirelessly with UE 104. Each base station 102 may provide communication coverage for a corresponding geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network including both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved B node (eNB) (HeNB), which may provide services to a restricted group referred to as a closed subscriber group (CSG). A communication link 120 between a base station 102 and a UE 104 may include an uplink (UL) (also referred to as a reverse link) transmission from the UE 104 to the base station 102 and / or a downlink (DL) (also referred to as a forward link) transmission from the base station 102 to the UE 104. The communication link 120 may use multiple input multiple output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmit diversity. These communication links may be through one or more carriers. The base station 102 / UE 104 may use spectrum of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.) bandwidth for each carrier allocated in the carrier aggregation for a total of up to Yx MHz (x component carriers) for transmission in each direction. The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated to DL compared to UL). The component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

[0068] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication may be through a variety of wireless D2D communication systems, such as, for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0069] The wireless communication system may further include a Wi-Fi access point (AP) 150 communicating with a Wi-Fi station (STA) 152 in the 5 GHz unlicensed spectrum via a communication link 154. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) prior to communication to determine whether the channel is available.

[0070] The small cell 102' may operate in a licensed and / or unlicensed spectrum. When operating in an unlicensed spectrum, the small cell 102' may employ NR and use the same 5 GHz unlicensed spectrum as used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum may boost the coverage of the access network and / or increase the capacity of the access network.

[0071] Whether a small cell 102' or a large cell (eg, a macro base station), the base station 102 may include an eNB, a g Node B (gNB), or other types of base stations. Some base stations, such as gNB 180, may operate in one or more frequency bands within an electromagnetic spectrum.

[0072] The electromagnetic spectrum is typically subdivided into various classes, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). Frequencies between FR1 and FR2 are typically referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as the “sub-6 GHz” band in various documents and articles. Similar naming issues sometimes arise with respect to FR2, which is often (interchangeably) referred to as the millimeter wave band in various documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0073] In view of the above aspects, unless otherwise specifically stated, it should be understood that if used herein, the term "sub-6 GHz" and the like may broadly refer to frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. In addition, unless otherwise specifically stated, it should be understood that if used herein, the term "millimeter wave" and the like may broadly refer to frequencies that may include mid-band frequencies, may be within FR2, or may be within the EHF band. However, communications using mmW radio frequency bands have extremely high path loss and short range. The mmW base station 180 can utilize beamforming 182 with the UE 104 to compensate for the high path loss and short range.

[0074] Base station 180 may transmit beamformed signals to UE 104 in one or more transmit directions 182'. UE 104 may receive beamformed signals from base station 180 in one or more receive directions 182". UE 104 may also transmit beamformed signals to base station 180 in one or more transmit directions. Base station 180 may receive beamformed signals from UE 104 in one or more receive directions. Base station 180 / UE 104 may perform beam training to determine the best receive direction and transmit direction for each of base station 180 / UE 104. The transmit direction and receive direction of base station 180 may be the same or may be different. The transmit direction and receive direction of UE 104 may be the same or may be different.

[0075] The EPC 160 may include a mobility management entity (MME) 162, other MMEs 164, a serving gateway 166, a multimedia broadcast multicast service (MBMS) gateway 168, a broadcast multicast service center (BM-SC) 170, and a packet data network (PDN) gateway 172. The MME 162 may be in communication with a home subscriber server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. In general, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are delivered through the serving gateway 166, which itself is connected to the PDN gateway 172. The PDN gateway 172 provides UE IP address allocation and other functions. The PDN gateway 172 and the BM-SC 170 are connected to IP services 176. The IP services 176 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, and / or other IP services. The BM-SC 170 may provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS gateway 168 may be used to distribute MBMS traffic to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts a specific service, and may be responsible for session management (start / stop) and for collecting eMBMS-related charging information.

[0076] The core network 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. AMF 192 may be in communication with a unified data management (UDM) 196. AMF 192 is a control node that handles signaling between UE 104 and the core network 190. In general, AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are delivered through UPF 195. UPF 195 provides UE IP address allocation and other functions. UPF 195 is connected to IP services 197. IP services 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, and / or other IP services.

[0077] A base station may also be referred to as a gNB, a Node B, an evolved Node B (eNB), an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmission reception point (TRP), or some other suitable term. The base station 102 provides an access point to the EPC 160 or the core network 190 for the UE 104. Examples of UE 104 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a tablet device, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a health care device, an implant, a sensor / actuator, a display, or any other similar functional device. Some UEs 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, ovens, vehicles, heart monitors, etc.). UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

[0078] Figures 2A-2D The explanation can be given by Figure 1 104 and base station 102 for use in communications between the UE 104 and the base station 102. Figure 2A 200 is a diagram illustrating an example of a first subframe within a 5G / NR frame structure. Figure 2B FIG230 is a diagram illustrating an example of DL channels within a 5G / NR subframe. Figure 2C 250 is a diagram illustrating an example of a second subframe within a 5G / NR frame structure. Figure 2D280 is a diagram illustrating an example of an UL channel within a 5G / NR subframe. The 5G / NR frame structure may be FDD, where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to either DL or UL, or TDD, where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to both DL and UL. Figure 2A , 2C In the example provided, the 5G / NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (mostly DL) and subframe 3 is configured with slot format 34 (mostly UL), where D is DL, U is UL, and X is for flexible use between DL / UL. Although subframes 3 and 4 are shown as having slot formats 34 and 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are full DL and full UL, respectively. Other slot formats 2-61 include a mixture of DL, UL, and flexible symbols. The UE is configured with a slot format (dynamically configured by DL control information (DCI) or semi-statically / statically configured by radio resource control (RRC) signaling) through the received slot format indicator (SFI). Note that the following description also applies to the 5G / NR frame structure for TDD.

[0079] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 equally sized subframes (1ms). Each subframe may include one or more time slots. A subframe may also include mini-slots, which may include 7, 4, or 2 symbols. Each time slot may include 7 or 14 symbols, depending on the time slot configuration. For time slot configuration 0, each time slot may include 14 symbols, and for time slot configuration 1, each time slot may include 7 symbols. The symbols on the DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power-limited scenarios; limited to single stream transmission). The number of time slots within a subframe is based on the time slot configuration and parameter design. For slot configuration 0, different parameter designs μ0 to 5 allow 1, 2, 4, 8, 16, and 32 slots per subframe, respectively. For slot configuration 1, different parameter designs 0 to 2 allow 2, 4, and 8 slots per subframe, respectively. Accordingly, for slot configuration 0 and parameter design μ, there are 14 symbols per slot and 2 per subframe. μ time slots. The subcarrier spacing and symbol length / duration vary depending on parameter design. The subcarrier spacing can be equal to 2 μ*15kHz, where μ is parameter design 0 to 5. Thus, parameter design μ=0 has a subcarrier spacing of 15kHz, while parameter design μ=5 has a subcarrier spacing of 480kHz. The symbol length / duration is inversely related to the subcarrier spacing. Figures 2A-2D An example of slot configuration 0 with 14 symbols per slot and parameter design μ=0 is provided, with 1 slot per subframe. The subcarrier spacing is 15 kHz and the symbol duration is about 66.7 μs.

[0080] A resource grid may be used to represent the frame structure. Each slot includes a resource block (RB) (also called a physical RB (PRB)) extending over 12 consecutive subcarriers. The resource grid is divided into a number of resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0081] like Figure 2A As explained in the illustration, some REs carry reference (pilot) signals (RS) for UEs. RSs may include demodulation RSs (DM-RSs) for channel estimation at the UE (indicated as R for a particular configuration). x , where 100x is the port number, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS). RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0082] Figure 2B An example of various DL channels within a subframe of a frame is illustrated. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs), each CCE including 9 RE groups (REGs), each REG including 4 consecutive REs in an OFDM symbol. The primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of a frame. The PSS is used by the UE 104 to determine the subframe / symbol timing and the physical layer identity. The secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE may determine the physical cell identifier (PCI). Based on the PCI, the UE may determine the location of the aforementioned DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) may be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block. The MIB provides the number of RBs in the system bandwidth, as well as the system frame number (SFN). The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH (such as System Information Blocks (SIBs)), and paging messages.

[0083] As in Figure 2CAs illustrated in FIG, some REs carry DM-RSs for channel estimation at the base station (indicated as R for one particular configuration, but other DM-RS configurations are possible). The UE may transmit DM-RSs for the physical uplink control channel (PUCCH) and DM-RSs for the physical uplink shared channel (PUSCH). The PUSCH DM-RS may be transmitted in the first or first two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether a short PUCCH or a long PUCCH is transmitted and on the specific PUCCH format used. Although not shown, the UE may transmit a sounding reference signal (SRS). The SRS may be used by the base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

[0084] Figure 2D An example of various UL channels within a subframe of an illustration frame. The PUCCH may be located at a position as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and HARQ ACK / NACK feedback. The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0085] Figure 31 is a block diagram of a base station 310 including a network PDCCH restriction component 198 and a UE 350 including a PDCCH restriction component 140 in an access network, the base station 310 being in communication with the UE 350. In the DL, IP packets from the EPC 160 may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration of UE measurement reports; PDCP layer functionality associated with header compression / decompression, security (ciphering, cipher decryption, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with delivery of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0086] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, including the physical (PHY) layer, may include error detection on the transport channel, forward error correction (FEC) encoding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and / or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine coding and modulation schemes and for spatial processing. The channel estimates may be derived from a reference signal and / or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0087] At the UE 350, each receiver 354RX receives a signal through its corresponding antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial stream destined for the UE 350. If there are multiple spatial streams destined for the UE 350, they can be combined into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then transforms the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, as well as the reference signal, are recovered and demodulated by determining the signal constellation point most likely transmitted by the base station 310. These soft decisions can be based on the channel estimates calculated by the channel estimator 358. These soft decisions are then decoded and deinterleaved to recover the data and control signals originally transmitted on the physical channel by the base station 310. These data and control signals are then provided to the controller / processor 359 which implements layer 3 and layer 2 functionality.

[0088] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport channels and logical channels, packet reassembly, cipher interpretation, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0089] Similar to the functionality described in conjunction with DL transmissions performed by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression, and security (encryption, decryption, integrity protection, integrity verification); RLC layer functionality associated with delivery of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing MAC SDUs onto TBs, demultiplexing MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0090] Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by a TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0091] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318RX receives a signal through its respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.

[0092] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport channels and logical channels, packet reassembly, cipher decoding, header decompression, control signal processing to recover IP packets from the UE 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0093] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 The PDCCH restriction component 140 combines various aspects.

[0094] Figure 4 4 is an example cell configuration 400 for a UE 104 including a PDCCH restriction component 140 including a multi-TRP cell 408 and a single TRP cell 418. The multi-TRP cell 408 may be controlled by a base station 402 and may include a first TRP 404 and a second TRP 406. The first TRP 404 may transmit a first PDCCH1 420 scheduling a first PDSCH1 422. The second TRP 406 may transmit a second PDCCH1 424 scheduling a second PDSCH 426. The single TRP cell 418 may be controlled by a base station 412 and include a single TRP 414. The single TRP 414 may transmit a third PDCCH3 430 scheduling a third PDSCH 432. In one aspect, the multi-TRP cell 408 and the single TRP cell 418 may form a master cell group (MCG). Additionally, the cell configuration 400 may include a secondary cell group (SCG) that may include, for example, a single TRP cell 458. The single TRP cell 458 may be controlled by the base station 452 and include a single TRP 454. The single TRP 454 may transmit a third PDCCH 4 460 that schedules a third PDSCH 462. The cell configuration 400 may include additional cells (not shown), each of which may be a single TRP cell or a multi-TRP cell and may transmit a respective PDCCH from each TRP.

[0095] In one aspect, PDCCHs 420, 424, 430, and 460 may all be received in the same time slot depending on UE capabilities and limitations. In one aspect, multiple PDCCH transmissions may allow for scheduling of larger amounts of data, thereby increasing the data rate of UE 104. However, UE 104 may be constrained (e.g., by hardware limitations) in the amount of PDCCH processing that may be performed. If UE 104 were to determine capabilities or limitations based solely on the number of serving cells, UE 104 would not be able to accurately account for additional PDCCHs transmitted by multiple TRP cells using multiple DCIs, and UE 104 would not be able to decode all configured PDCCHs in some cases. PDCCH restriction component 140 may signal capabilities and determine limitations that account for multiple TRP cells so that UE 104 may decode the PDCCHs for which it is configured.

[0096] Figure 5 Message diagram 500 illustrating example messages that may be transmitted between a UE 104 and a base station 402 to establish restrictions on blind decoding of a PDCCH, which base station 402 may be a multi-TRP cell 408 including a first TRP 404 and a second TRP 406.

[0097] The UE 104 may transmit UE capabilities 510 related to PDCCH processing. For example, the UE capabilities 510 may include a value (X) 512 indicating PDCCH monitoring capabilities across all downlink serving cells. The value X may be referred to as pdcch-BlindDetectionCA. The UE 104 may determine whether to transmit X 512 based on whether the UE 104 is capable of supporting a threshold number (e.g., 4) of downlink serving cells. When the UE 104 is dual connectivity capable, the UE 104 may transmit a value (Y) 514 indicating PDCCH monitoring capabilities for MCG and a value (Z) 516 indicating PDCCH monitoring capabilities for SCG. The value Y 514 may be referred to as pdcch-BlindDetectionMCG-UE and the value Z 516 may be referred to as pdcch-BlindDetectionSCG-UE. In implementations where the UE signals values ​​for each CORESET group separately, the value X may include X0 and X1, the value Y may include Y0 and Y1, and the value Z may include Z0 and Z1.

[0098] The base station 402 may transmit a cell configuration 520 that may configure the UE 104 with multiple serving cells. For example, the cell configuration 520 may include or may indicate the number of single-TRP cells (a) 512 and the number of multi-TRP cells (b) 514. When the UE 104 is dual-connectivity capable, the cell configuration 520 may include a value (y) 526 indicating the configured PDCCH monitoring capability for the MCG and a value (z) 528 indicating the configured PDCCH monitoring capability for the SCG. The value (y) 526 may be referred to as pdcch-BlindDetectionMCG and the value (z) 528 may be referred to as pdcch-BlindDetectionSCG.

[0099] At block 530, UE 104 may determine a limit on PDCCH reception. For example, UE 104 may determine a total limit on PDCCH candidates and non-overlapping CCEs to monitor in a time slot of a cell group. The maximum number of monitored PDCCH candidates for an SCS may be referred to as This can be determined based on the following table:

[0100] Table 10.1-2: Maximum number of PDCCH candidates monitored in each slot for a DL BWP with SCS configuration μ∈{0,1,2,3} for a single serving cell

[0101]

[0102] The maximum number of non-overlapping CCEs may be referred to as This can be determined based on the following table:

[0103] Table 10.1-3: Maximum number of non-overlapping CCEs in each slot for a DL BWP with SCS configuration μ∈{0,1,2,3} for a single serving cell

[0104]

[0105] As discussed in more detail below, in the present application, limits may account for multiple TRP cells, rather than a single serving cell with a single TRP. In a first implementation, an overall monitoring limit may apply to all serving cells in a cell group. In the case of dual connectivity, there may be separate overall monitoring limits for MCGs and for SCGs. In a second implementation, the overall monitoring limit may apply to serving cells in a cell group configured for a CORESET group. Thus, the UE 104 may determine a separate overall monitoring limit for each CORESET group. In the case of dual connectivity, the UE 104 may also determine separate overall monitoring limits for MCGs and for SCGs for each CORESET group. Thus, in the case of two CORESET groups and dual connectivity, the UE 104 may determine four (4) separate overall monitoring limits. The UE 104 may also determine per-cell monitoring limits. In the first implementation, the per-cell monitoring limit for multiple TRP cells may be based on a multiplication factor. In a second implementation, the UE 104 may determine a per-cell monitoring limit for each CORESET group. Therefore, a multi-TRP cell using two CORESET groups can be associated with two per-cell monitoring limits.

[0106] The base station 102 may transmit the first PDCCH 540 and the second PDCCH 542, and the UE 104 may receive the first PDCCH 540 and the second PDCCH 542 as well as other PDCCHs transmitted by other serving cells based on the restrictions determined in block 530. In an aspect, the network may be aware of the restrictions based on the UE capabilities 510 and the cell configuration 520, and may avoid transmitting PDCCHs that would exceed the restrictions for the UE. In an aspect, however, the primary serving cell may use oversubscription to cause the UE 104 to be configured with PDCCH candidates that may result in exceeding the restrictions on PDCCH candidates and / or non-overlapping CCEs.

[0107] At block 550, UE 104 may perform decoding based on the restriction. That is, UE 104 may perform decoding based on at most the restricted number of (e.g., ) Decoding PDCCH candidates on non-overlapping CCEs until the PDCCH candidate is restricted (e.g., ). In an oversubscribed scenario, even if the UE 104 is configured with PDCCH candidates that exceed the limits (e.g., based on the number of configured search spaces and the aggregation level), the UE 104 may follow the limits and stop decoding when one or more of these limits are reached.

[0108] The base station 402 may transmit the first PDSCH 560 and the second PDSCH 562 from the first TRP 404 and the second TRP 406, respectively. The UE 104 may receive the first PDSCH 560 and the second PDSCH 562 based on the decoded PDCCH 540, 542.

[0109] Figure 6 Flow chart of a wireless communication method 600 that can be executed by a UE (e.g., UE 104, which may include memory 360 and may be the entire UE 104 or a component of UE 104 (such as PDCCH restriction component 140, TX processor 368, RX processor 356 and / or controller / processor 359)) to establish restrictions on blind decoding of PDCCH.

[0110] In block 610, the method 600 may include determining, by the UE at least in part based on a multiplication factor (r) for a serving cell with multiple TRPs (e.g., a cell with two CORESET groups), whether to signal a value (X) representing a PDCCH monitoring capability across all downlink serving cells. In one aspect, for example, the UE 104 and / or the controller / processor 359 may execute the PDCCH restriction component 140 and / or the capability component 141 to determine whether to signal a value (X) 512 representing a PDCCH monitoring capability across all downlink serving cells based at least in part on the multiplication factor (r), the number of serving cells with multiple TRPs (e.g., cell 408), and the number of serving cells with a single TRP (e.g., cell 418). Thus, the UE 104 and / or the controller / processor 359 executing the PDCCH restriction component 140 and / or the capability component 141 may provide means for determining whether to signal a value representing the PDCCH monitoring capability across all downlink serving cells based at least in part on a multiplication factor for a serving cell having two CORESET groups.

[0111] For example, at sub-block 612, block 610 may include determining to signal a value (X) when the UE is capable of receiving from a first number of single-TRP cells and a second number of multi-TRP cells and the product of the first number plus a multiplication factor multiplied by the second number is greater than a threshold. For example, if the UE 104 indicates the capability of A or more serving cells with a single TRP and B or more serving cells with multiple TRPs such that A+rB>4, the UE 104 may signal the value of X. If A+rB≤4, the UE 104 may avoid signaling the value of X. If the UE is NR-DC capable, the UE 104 may determine a first value (Y) indicating PDCCH monitoring capability for the MCG and a second value (Z) indicating PDCCH monitoring capability for the SCG. If the UE 104 reports X, when the UE signals Y and Z, the value of Y+Z may be greater than the value of X. If the UE 104 does not report X, then the sum of Y and Z may be greater than or equal to the value A+rB that the UE 104 may be configured with in both the MCG and the SCG.

[0112] At block 620, the method 600 may optionally include signaling a numerical value (X) having a value that is less than or equal to a first number of single-TRP cells plus a multiplication factor multiplied by a second number of multiple-TRP cells that the UE is capable of supporting. In one aspect, for example, the UE 104 and / or the controller / processor 359 may execute the PDCCH restriction component 140 and / or the capability component 141 to signal a numerical value X 512 having a value that is less than or equal to a first number of single-TRP cells plus a multiplication factor multiplied by a second number of multiple-TRP cells. Block 620 may be performed in response to subblock 612. If the UE 104 is NR-DC capable, the UE may also report Y 514 and Z 516. Thus, the UE 104 and / or controller / processor 359 executing the PDCCH restriction component 140 and / or capability component 141 may provide a device for signaling a numerical value representing the PDCCH monitoring capability across all downlink serving cells having a value that is less than or equal to a first number of single-TRP cells plus a multiplication factor multiplied by a second number of multi-TRP cells.

[0113] At block 630, the method 600 may include receiving, by the UE, a configuration of a serving cell indicating a number (a) of configured downlink serving cells having a single TRP and a number (b) of configured downlink serving cells having multiple TRPs. In one aspect, for example, the UE 104 and / or the controller / processor 359 may execute the PDCCH restriction component 140 and / or the configuration component 142 to receive a cell configuration 520 of a serving cell indicating a number (a) 522 of configured downlink serving cells having a single TRP and a number (b) 524 of configured downlink serving cells having multiple TRPs. When the UE 104 is configured for NR-DC, the cell configuration 520 may also include a value y 526 and a value z 528. The value y 526 is less than or equal to the value Y 514. The value z 528 is less than or equal to the value Z 516. That is, the configured capability may be less than or equal to the reported capability. Furthermore, if the UE 104 reports X 512, then the sum of the value y 526 and the value z 528 is less than or equal to X 512. If the UE 104 does not report X 512, then the sum of the value y 526 and the value z 528 is less than or equal to a+rb. Thus, the UE 104 and / or the controller / processor 359 executing the PDCCH restriction component 140 and / or the configuration component 142 may provide means for receiving, by the UE, a configuration of a serving cell, the configuration indicating a number of configured downlink serving cells having a single TRP and a number of configured downlink serving cells having multiple TRPs.

[0114] In block 640, the method 600 may include determining, by the UE, a limit on the number of serving cells (Ncap) based on (i) the configuration and the multiplication factor in response to determining that a value indicating the PDCCH monitoring capability is not to be signaled, or determining, by the UE, a limit on the number of serving cells (Ncap) based on (ii) the value indicating the PDCCH monitoring capability in response to determining that a value indicating the PDCCH monitoring capability is to be signaled. In one aspect, for example, the UE 104 and / or the controller / processor 359 may execute the PDCCH restriction component 140 and / or the Ncap component 143 to determine, by the UE 104 and / or the controller / processor 359, Ncap based on (i) the configuration (e.g., a 522 and b 524) and the multiplication factor r in response to determining that a value indicating the PDCCH monitoring capability is not to be signaled, or determining, by the UE 104 and / or the controller / processor 359, Ncap based on (ii) the value indicating the PDCCH monitoring capability in response to determining that a value indicating the PDCCH monitoring capability is to be signaled. Therefore, the UE 104 and / or the controller / processor 359 executing the PDCCH restriction component 140 and / or the Ncap component 143 may provide a device for determining the limit on the number of service cells based on (i) the configuration and the multiplication factor in response to determining that a value representing the PDCCH monitoring capability is not to be signaled, or determining the limit on the number of service cells based on (ii) a value representing the PDCCH monitoring capability in response to determining that a value representing the PDCCH monitoring capability is to be signaled.

[0115] For example, in sub-block 642, block 640 may include determining Ncap as the product of the number of configured downlink serving cells with a single TRP plus a multiplication factor multiplied by the number of configured downlink serving cells with multiple TRPs. That is, when UE 104 does not report X and is not configured for NR-DC operation, Ncap may be set to a+rb. If UE 104 does not report X in block 630, Ncap may be set to X. When UE 104 is configured for NR-DC and UE 104 does not report X, Ncap may be a+2b, where a and b are counted in both the MCG and the SCG.

[0116] At block 650, the method 600 may include determining, by the UE based on the Ncap, an aggregate limit of PDCCH candidates and non-overlapping CCEs to be monitored in time slots of a cell group and a per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in time slots of each scheduled cell in single-TRP cells and multi-TRP cells. In one aspect, for example, the UE 104 and / or the controller / processor 359 may execute the PDCCH restriction component 140 and / or the restriction component 144 to determine, based on the Ncap, an aggregate limit of PDCCH candidates and non-overlapping CCEs to be monitored in time slots of a cell group and a per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in time slots of each scheduled cell in single-TRP cells and multi-TRP cells. Additional details on determining the aggregate limit and per-cell limit are provided below. Figure 8 Discussion. Thus, the UE 104 and / or the controller / processor 359 executing the PDCCH restriction component 140 and / or the restriction component 144 may provide means for determining an aggregate restriction of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a group of cells and a per-cell restriction of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each scheduled cell in single-TRP cells and multi-TRP cells based on a restriction on the number of serving cells.

[0117] In box 660, method 600 may include receiving a downlink control channel in a time slot by performing blind decoding operations on CCEs up to the total limit and up to the per-cell limit. In one aspect, for example, UE 104 and / or controller / processor 359 may execute PDCCH limit component 140 and / or decoding component 145 to receive a downlink control channel (e.g., PDCCH) in a time slot by performing blind decoding operations on CCEs up to the total limit and up to the per-cell limit. That is, UE 104 may perform decoding operations for up to the total limit PDCCH candidates and may perform decoding operations on up to the total limit non-overlapping CCEs. In addition, for each cell, UE 104 may perform decoding operations for up to the cell limit PDCCH candidates and may perform decoding operations on up to the cell limit non-overlapping CCEs. Additional details of receiving a downlink control channel in the presence of oversubscription on the primary cell are provided below. Figure 7 Thus, the UE 104 and / or the controller / processor 359 executing the PDCCH limiting component 140 and / or the decoding component 145 may provide means for receiving a downlink control channel in a time slot by performing blind decoding operations on CCEs up to the overall limit and up to the per-cell limit.

[0118] Figure 7is a flow chart of a wireless communication method 700 that may be executed by a UE (e.g., UE 104, which may include memory 360 and may be the entire UE 104 or a component of UE 104 (such as PDCCH restriction component 140, TX processor 368, RX processor 356 and / or controller / processor 359)) for performing oversubscription. In an aspect, method 700 may be performed by decoding component 145. Method 700 may correspond to block 660 of method 600. In an aspect, in the case where UE 104 is configured for NR-DC, method 700 may be executed for per-cell restriction for each CORESET group. The per-cell restriction for each CORESET group may be half of the per-cell restriction for multi-TRP cells or the per-cell restriction for single-TRP cells.

[0119] At block 710, method 700 may include deducting blind detection and control channel elements corresponding to the common search space set from the per-cell limit for the primary cell. In an aspect, for example, decoding component 145 may deduct blind detection and control channel elements corresponding to the common search space set from the per-cell limit for the primary cell. In an oversubscription scenario, PDCCH candidates and CCEs for the common search space may be mandatory and counted within the per-cell limit. Therefore, decoding component 145 may subtract PDCCH candidates and CCEs for the common search space from the corresponding limit.

[0120] At block 720, the method 700 may include decoding the UE-specific search space starting from the lowest index and deducting the number of blind detections and CCEs used for decoding for each index from the per-cell limit of the primary cell. In one aspect, for example, the decoding component 145 may decode the UE-specific search space starting from the lowest index and deducting the number of blind detections and CCEs used for decoding for each index from the per-cell limit of the primary cell. That is, the UE may perform a decoding operation for each index and subtract the performed PDCCH candidates and CCEs from the corresponding per-cell limit.

[0121] At block 730, the method 700 may include stopping decoding when the number of blind detection or control channel elements configured for the next index is greater than the remaining number of PDCCH candidates or non-overlapping CCEs in the per-cell restriction for the primary cell. In an aspect, for example, the decoding component 145 may stop decoding when the number of blind detection or control channel elements configured for the next index is greater than the remaining number of PDCCH candidates or non-overlapping CCEs in the per-cell restriction for the primary cell. Thus, the decoding component 145 may stop decoding based on the per-cell restriction even if additional search spaces are configured for the primary serving cell.

[0122] Figure 8 800 is a flow chart of a wireless communication method 800 that may be performed by a UE (e.g., UE 104, which may include memory 360 and may be the entire UE 104 or a component of UE 104 (such as PDCCH restriction component 140, TX processor 368, RX processor 356, and / or controller / processor 359) for determining an overall restriction and a per-cell restriction. In an aspect, method 800 may correspond to block 650 of method 600. Method 800 may be performed by restriction component 144.

[0123] At decision block 810, method 800 may include determining whether the equivalent value (a+rb) of the serving cell is less than or equal to Ncap. The equivalent value of the serving cell may be determined based on the cell configured for each SCSμ. For example, and represents the number of downlink cells for which UE 104 is configured with single-TRP and multi-TRP operation, respectively, and has an active downlink BWP with SCSμ. Therefore, in the case of 4 maximum downlink BWPs, the equivalent value of the serving cell can be expressed as That is, the limiting component 144 can determine that the product of the number of configured downlink serving cells having a single TRP plus the multiplication factor multiplied by the number of configured downlink serving cells having multiple TRPs is less than or equal to Ncap. The method 800 may then proceed to block 820. If The method 800 may then continue to block 840. That is, the limiting component 144 may determine that the product of the number of configured downlink serving cells having a single TRP plus the multiplication factor multiplied by the number of configured downlink serving cells having multiple TRPs is greater than Ncap.

[0124] At block 820, method 800 may include determining a per-cell restriction for a single TRP cell as a value based on an SCS of a corresponding single TRP cell. For example, restriction component 144 may determine a per-cell restriction for a single TRP cell as a value based on an SCS of a corresponding single TRP cell. That is, the restriction of the PDCCH candidates scheduled for each cell in a cell configured with a single TRP may be And the restriction of non-overlapping CCEs per cell scheduled in a cell configured with a single TRP can be

[0125] At block 830, method 800 may include determining a per-cell restriction for a multi-TRP cell as a multiplication factor multiplied by a value based on an SCS of a corresponding multi-TRP cell. For example, restriction component 144 may determine a per-cell restriction for a multi-TRP cell as a multiplication factor multiplied by a value based on an SCS of a corresponding multi-TRP cell. That is, the restriction of PDCCH candidates scheduled for each cell in a cell configured with multiple TRPs may be And the restriction of non-overlapping CCEs scheduled for each cell in a cell configured with multiple TRPs can be

[0126] In block 840, method 800 may include determining a total limit for a cell group having an SCS as the floor of a value calculated by multiplying Ncap by the value of the SCS for a single TRP serving cell by the ratio of the number of configured downlink serving cells with a single TRP for that SCS plus a multiplication factor multiplied by the number of configured downlink serving cells with multiple TRPs for that SCS and the total number of configured downlink serving cells with a single TRP in the cell group plus a multiplication factor multiplied by the total number of configured downlink serving cells with multiple TRPs in the cell group. For example, limit component 144 may determine the total limit for PDCCH candidates for all downlink cells having a given SCS as Similarly, limit component 144 can determine the total limit of non-overlapping CCEs for all downlink cells with a given SCS as

[0127] In block 850, method 800 may include determining a per-cell limit for a single TRP cell as a minimum of a value of the SCS of the single TRP serving cell and an overall limit for a group of cells for the SCS. For example, limit component 144 may determine a per-cell limit for a single TRP cell as The non-overlapping CCEs are restricted by cell as

[0128] In block 860, method 800 may include determining a per-cell restriction for the multi-TRP cell as a multiplication factor multiplied by the value of the SCS for the single-TRP serving cell and a minimum of the total restriction for the cell group for the SCS. For example, restriction component 144 may determine a per-cell restriction for the PDCCH candidates for the multi-TRP cell as The non-overlapping CCEs are restricted by cell as

[0129] Fig. 9 Flowchart of a wireless communication method 900 that may be performed by a UE (e.g., UE 104, which may include memory 360 and may be the entire UE 104 or a component of UE 104 (such as PDCCH restriction component 140, TX processor 368, RX processor 356, and / or controller / processor 359) for establishing restrictions on blind decoding of PDCCH. Method 900 may correspond to a second implementation of establishing restrictions on blind decoding using separate restrictions for each CORESET group.

[0130] In block 910, the method 900 may include determining, by the UE, whether to signal a first value representing a PDCCH monitoring capability across all downlink serving cells for a first CORESET group and a second value representing a PDCCH monitoring capability across all downlink serving cells for a second CORESET group. In one aspect, for example, the UE 104 and / or the controller / processor 359 may execute the PDCCH restriction component 140 and / or the capability component 141 to determine whether to signal a first value (X1) representing a PDCCH monitoring capability across all downlink serving cells for the first CORESET group and a second value (X2) representing a PDCCH monitoring capability across all downlink serving cells for the second CORESET group. Thus, the UE 104 and / or the controller / processor 359 executing the PDCCH restriction component 140 and / or the capability component 141 may provide a device for determining whether to signal a first value representing the PDCCH monitoring capability across all downlink serving cells for a first CORESET group and a second value representing the PDCCH monitoring capability across all downlink serving cells for a second CORESET group.

[0131] In sub-block 912, block 910 may optionally include signaling a first value when the UE is capable of supporting more than a threshold number of downlink serving cells in which the first CORESET group is configured and signaling a second value when the UE is capable of supporting more than the threshold number of downlink serving cells in which the second CORESET group is configured. For example, capability component 141 may signal X1 when UE 104 is capable of supporting more than a threshold number (e.g., 4) of downlink serving cells in which the first CORESET group is configured and signaling X1 when the UE is capable of supporting more than the threshold number (e.g., 4) of downlink serving cells in which the second CORESET group is configured. The value of X0 may be greater than or equal to 4. The value of X1 may be greater than or equal to 4.

[0132] In sub-block 914, method 900 may optionally include signaling both the first value and the second value when the sum of the number of serving cells that can be configured with the first CORESET group and the number of serving cells that can be configured with the second CORESET group is greater than a threshold. That is, the UE is capable of supporting A or more serving cells that can be configured with only one CORESET group and B or more serving cells that can be configured with 2 CORESET groups such that A+2B>4. For example, capability component 141 may signal both X1 and X2 when the sum of the number of serving cells that can be configured with the first CORESET group and the number of serving cells that can be configured with the second CORESET group is greater than a threshold. The sum of the values ​​of X0 and X1 is greater than or equal to the threshold (e.g., 4). If the UE is configured with NR-DC, the UE may also signal Y0, Y1, Z0, Z1. If the UE reports X0, the value of Y0+Z0 is greater than or equal to X0. If the UE reports X1, the value of Y1+Z1 is greater than or equal to X1. If the UE does not report X0, then Y0+Z0 is greater than or equal to the maximum number of downlink cells in which the first CORESET group can be configured. If the UE does not report X1, then Y1+Z1 is greater than or equal to the maximum number of downlink cells in which the second CORESET group can be configured.

[0133] In block 920, method 900 may include receiving, by the UE, a configuration of serving cells, the configuration indicating a number of configured downlink serving cells for a first CORESET group and a number of configured downlink serving cells for a second CORESET group. In one aspect, for example, UE 104 and / or controller / processor 359 may execute PDCCH restriction component 140 and / or configuration component 142 to receive, by the UE, a cell configuration 520 of serving cells, the cell configuration 520 indicating a number of configured downlink serving cells for a first CORESET group and a number of configured downlink serving cells for a second CORESET group. If the UE is configured with NR-DC, the cell configuration 520 may include y0 and z0 for the first CORESET group and y1 and z1 for the second CORESET group. The value of y0 is less than or equal to Y0. The value of z0 is less than or equal to Z0. The value of y1 is less than or equal to Y1. The value of z1 is less than or equal to Z1. If the UE reports X0, then y0+z0 is less than or equal to X0. Otherwise, y0+z0 is less than or equal to the number of configured DL cells in which a CORESET with a higher layer index = 0 is configured in both the MCG and the SCG, and y1+z1 is less than or equal to the number of configured DL cells in which a CORESET with a higher layer index = 1 is configured. Thus, the UE 104 and / or the controller / processor 359 executing the PDCCH restriction component 140 and / or the capability component 141 may provide means for receiving a configuration of serving cells, the configuration indicating the number of configured downlink serving cells for a first CORESET group and the number of configured downlink serving cells for a second CORESET group.

[0134] In block 930, the method 900 may include determining, by the UE, a limit on the number of serving cells for the first CORESET group (Ncap0) based on the configuration or the first value and determining a limit on the number of serving cells for the second CORESET group (Ncap1) based on the configuration or the second value. In one aspect, for example, the UE 104 and / or the controller / processor 359 may execute the PDCCH restriction component 140 and / or the Ncap component 143 to determine the limit on the number of serving cells for the first CORESET group (Ncap0) based on the configuration or the first value X1 and determine the limit on the number of serving cells for the second CORESET group (Ncap1) based on the configuration or the second value X2. Thus, the UE 104 and / or the controller / processor 359 executing the PDCCH restriction component 140 and / or the Ncap component 143 may provide means for receiving a configuration of serving cells, the configuration indicating a number of configured downlink serving cells for the first CORESET group and a number of configured downlink serving cells for the second CORESET group.

[0135] In sub-block 932, block 930 may include determining, for each CORESET group, the number of configured downlink cells in which a corresponding CORESET with a higher layer index corresponding to the corresponding CORESET group is configured. For example, the Ncap component 143 may determine, for each CORESET group, the number of configured downlink cells in which a corresponding CORESET with a higher layer index corresponding to the corresponding CORESET group is configured. For example, if the UE does not report X0, Ncap0 may be set to the number of configured DL cells in which a CORESET with a higher layer index = 0 is configured. Similarly, if the UE does not report X1, Ncap1 may be set to the number of configured DL cells in which a CORESET with a higher layer index = 1 is configured. If X0 or X1 is reported, the corresponding Ncap0 or Ncap1 may be set to the reported value of X0 or X1. If UE 104 is configured for NR-DC, the value of Ncap0 may be determined separately for MCG and SCG by y0 and z0 for the first CORESET group, and the value of Ncap1 may be determined separately for MCG and SCG by y1 and z1 for the second CORESET group.

[0136] In block 940, the method 900 may include determining, by the UE, a first overall limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a cell group for a first CORESET group based on Ncap0 and determining a first per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each scheduled cell of the first CORESET group based on Ncap0. In an aspect, for example, the UE 104 and / or the controller / processor 359 may execute the PDCCH limiting component 140 and / or the limiting component 144 to determine a first overall limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a cell group for the first CORESET group based on Ncap0 and determine a first per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each scheduled cell of the first CORESET group based on Ncap0. Thus, the UE 104 and / or the controller / processor 359 executing the PDCCH restriction component 140 and / or the restriction component 144 may provide means for determining a first overall restriction on PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a group of cells of the first CORESET group based on a restriction on the number of serving cells for the first CORESET group, and determining a first per-cell restriction on PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each scheduled cell of the first CORESET group based on a restriction on the number of serving cells for the first CORESET group.

[0137] In block 950, method 900 may include determining a second overall limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a cell group for a second CORESET group based on Ncap1 and determining a second per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each scheduled cell of the second CORESET group based on Ncap1. In an aspect, for example, UE 104 and / or controller / processor 359 may execute PDCCH limiting component 140 and / or limiting component 144 to determine a second overall limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for a cell group for a second CORESET group based on Ncap1 and determine a second per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a time slot for each scheduled cell of the second CORESET group based on Ncap1. Thus, the UE 104 and / or the controller / processor 359 executing the PDCCH limiting component 140 and / or the limiting component 144 may provide means for determining a second overall limit on PDCCH candidates and non-overlapping CCEs to be monitored in time slots for a group of cells of the second CORESET group based on a limit on the number of serving cells for the second CORESET group, and determining a second per-cell limit on PDCCH candidates and non-overlapping CCEs to be monitored in time slots for each scheduled cell of the second CORESET group based on a limit on the number of serving cells for the second CORESET group.

[0138] In block 960, the method 900 may include receiving a downlink control channel in a time slot by performing blind decoding operations on CCEs up to a first overall limit and up to a first per-cell limit for a first CORESET group and performing blind decoding operations on CCEs up to a second overall limit and up to a second per-cell limit for a second CORESET group. In an aspect, for example, the UE 104 and / or the controller / processor 359 may execute the PDCCH limiting component 140 and / or the decoding component 145 to receive a downlink control channel in the time slot by performing blind decoding operations on CCEs up to a first overall limit and up to a first per-cell limit for a first CORESET group and performing blind decoding operations on CCEs up to a second overall limit and up to a second per-cell limit for a second CORESET group. In a scenario where the primary serving cell utilizes oversubscription, the UE 104 may perform the method 700 for the first CORESET group using the first per-cell limit and perform the method 700 a second time for the second CORESET group using the second per-cell limit. Thus, the UE 104 and / or the controller / processor 359 executing the PDCCH limiting component 140 and / or the decoding component 145 may provide a means for receiving a downlink control channel in a time slot by performing blind decoding operations on CCEs up to a first overall limit and up to a first per-cell limit for a first CORESET group and performing blind decoding operations on CCEs up to a second overall limit and up to a second per-cell limit for a second CORESET group.

[0139] Reference Fig.10 , an example of an implementation of the UE 104 may include a variety of components, some of which have been described above, but also include components such as one or more processors 1012 and memory 1016 in communication via one or more buses 1044 and transceiver 1002, which can operate in conjunction with the modem 1014 and PDCCH restriction component 140 to implement one or more functions described herein related to restriction of PDCCH decoding. In addition, the one or more processors 1012, modem 1014, memory 1016, transceiver 1002, RF front end 1088, and one or more antennas 1065 can be configured to support voice and / or data calls (simultaneous or non-simultaneous) in one or more radio access technologies. Antenna 1065 may include one or more antennas, antenna elements, and / or antenna arrays.

[0140] In one aspect, the one or more processors 1012 may include a modem 1014 using one or more modem processors. Various functions associated with the PDCCH restriction component 140 may be included in the modem 1014 and / or the processor 1012, and in one aspect may be performed by a single processor, while in other aspects, different ones of the functions may be performed by a combination of two or more different processors. For example, in one aspect, the one or more processors 1012 may include any one or any combination of the following: a modem processor, or a baseband processor, or a digital signal processor, or a transmit processor, or a receiver processor, or a transceiver processor associated with the transceiver 1002. In other aspects, some of the features of the one or more processors 1012 and / or the modem 1014 associated with the PDCCH restriction component 140 may be performed by the transceiver 1002.

[0141] In addition, the memory 1016 can be configured to store data used herein and / or local versions of the applications 1075, the PDCCH restriction component 140, and / or one or more subcomponents thereof executed by the at least one processor 1012. The memory 1016 may include any type of computer-readable medium usable by a computer or the at least one processor 1012, such as a random access memory (RAM), a read-only memory (ROM), a tape, a magnetic disk, an optical disk, a volatile memory, a non-volatile memory, and any combination thereof. In one aspect, for example, when the UE 104 is operating the at least one processor 1012 to execute the PDCCH restriction component 140 and / or one or more subcomponents thereof, the memory 1016 may be a non-transitory computer-readable storage medium storing one or more computer-executable codes defining the PDCCH restriction component 140 and / or one or more subcomponents thereof and / or data associated therewith.

[0142] The transceiver 1002 may include at least one receiver 1006 and at least one transmitter 1008. The receiver 1006 may include hardware, firmware, and / or software code executable by a processor for receiving data, the code including instructions and stored in a memory (e.g., a computer-readable medium). The receiver 1006 may be, for example, a radio frequency (RF) receiver. In one aspect, the receiver 1006 may receive signals transmitted by at least one base station 102. Additionally, the receiver 1006 may process such received signals and may also obtain measurements of these signals, such as but not limited to Ec / Io, SNR, RSRP, RSSI, etc. The transmitter 1008 may include hardware, firmware, and / or software code executable by a processor for transmitting data, the code including instructions and stored in a memory (e.g., a computer-readable medium). Suitable examples of the transmitter 1008 may include, but are not limited to, an RF transmitter.

[0143] Also, in an aspect, the UE 104 may include an RF front end 1088 that may operate in communication with the one or more antennas 1065 and the transceiver 1002 for receiving and transmitting radio transmissions, such as wireless communications transmitted by at least one base station 102 or wireless transmissions transmitted by the UE 104. The RF front end 1088 may be connected to the one or more antennas 1065 and may include one or more low noise amplifiers (LNAs) 1090, one or more switches 1092, one or more power amplifiers (PAs) 1098, and one or more filters 1096 for transmitting and receiving RF signals.

[0144] In one aspect, the LNA 1090 can amplify the received signal to a desired output level. In one aspect, each LNA 1090 can have a specified minimum and maximum gain value. In one aspect, the RF front end 1088 can use one or more switches 1092 to select a particular LNA 1090 and its specified gain value based on the desired gain value for a particular application.

[0145] In addition, for example, one or more PAs 1098 can be used by the RF front end 1088 to amplify the signal to obtain an RF output at a desired output power level. In one aspect, each PA 1098 can have a specified minimum and maximum gain value. In one aspect, the RF front end 1088 can use one or more switches 1092 to select a particular PA 1098 and its specified gain value based on the desired gain value for a particular application.

[0146] In addition, for example, one or more filters 1096 can be used by the RF front end 1088 to filter the received signal to obtain the input RF signal. Similarly, in one aspect, for example, the corresponding filter 1096 can be used to filter the output from the corresponding PA 1098 to produce an output signal for transmission. In one aspect, each filter 1096 can be connected to a specific LNA 1090 and / or PA 1098. In one aspect, the RF front end 1088 can use one or more switches 1092 to select a transmit or receive path using a specified filter 1096, LNA 1090, and / or PA 1098 based on the configuration specified by the transceiver 1002 and / or the processor 1012.

[0147] As such, the transceiver 1002 may be configured to transmit and receive wireless signals through one or more antennas 1065 via the RF front end 1088. In an aspect, the transceiver 1002 may be tuned to operate at a specified frequency so that the UE 104 may communicate, for example, with one or more base stations 102 or one or more cells associated with the one or more base stations 102. In an aspect, the modem 1014 may configure the transceiver 1002 to operate at a specified frequency and power level based on, for example, a UE configuration of the UE 104 and a communication protocol used by the modem 1014.

[0148] In one aspect, the modem 1014 may be a multi-band-multi-mode modem that may process digital data and communicate with the transceiver 1002 so that the digital data is sent and received using the transceiver 1002. In one aspect, the modem 1014 may be multi-band and configured to support multiple frequency bands for a specific communication protocol. In one aspect, the modem 1014 may be multi-mode and configured to support multiple operating networks and communication protocols. In one aspect, the modem 1014 may control one or more components (e.g., RF front end 1088, transceiver 1002) of the UE 104 to enable transmission and / or reception of signals from the network based on a specified modem configuration. In one aspect, the modem configuration may be based on the mode of the modem and the frequency band in use. In another aspect, the modem configuration may be based on UE configuration information associated with the UE 104, such as provided by the network during cell selection and / or cell reselection.

[0149] Reference Fig.11 , an example implementation of the base station 102 may include a variety of components, some of which have been described above, but also include components such as one or more processors 1112 and memory 1116 in communication via one or more buses 1154 and a transceiver 1102, which can operate in conjunction with a modem 1114 and a network PDCCH restriction component 198 to implement one or more functions related to PDCCH restriction described herein.

[0150] The transceiver 1102, receiver 1106, transmitter 1108, one or more processors 1112, memory 1116, applications 1175, bus 1154, RF front end 1188, LNA 1190, switch 1192, filter 1196, PA 1198, and one or more antennas 1165 may be the same or similar to the corresponding components of UE 104 as described above, but are configured or otherwise programmed for base station operation rather than UE operation.

[0151] It should be understood that the specific order or hierarchy of each box in the disclosed process / flowchart is an illustration of an example approach. It should be understood that the specific order or hierarchy of each box in these process / flowcharts can be rearranged based on design preferences. In addition, some boxes can be combined or omitted. The attached method claims present the elements of various boxes in an exemplary order and are not meant to be limited to the specific order or hierarchy presented.

[0152] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be easily understood by those skilled in the art, and the universal principles defined in this article can be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown in this article, but should be granted the full scope consistent with the claims in language, wherein the singular reference of the elements is not intended to represent "there is and only one", but "one or more", unless otherwise stated. The wording "exemplary" is used herein to mean "used as an example, instance or explanation". Any aspect described as "exemplary" herein does not have to be interpreted as being superior to or superior to other aspects. Unless otherwise stated, the term "some / certain" refers to one or more. Combinations such as "at least one of A, B or C", "one or more of A, B or C", "at least one of A, B and C", "one or more of A, B and C" and "A, B, C or any combination thereof" include any combination of A, B and / or C, and may include multiple A, multiple B or multiple C. Specifically, combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, wherein any such combination may include one or more members of A, B, or C. All structural and functional equivalents of the elements of the various aspects described throughout this disclosure that are currently or hereafter known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is expressly recorded in the claims. The terms "module," "mechanism," "element," "device," and the like may not be a substitute for the term "means." Thus, no claim element should be interpreted as a means-plus-function unless the element is explicitly stated using the phrase "means for..."

Claims

1. A method of wireless communication, comprising: receiving, by a user equipment UE, a configuration of serving cells, the configuration indicating a number of configured downlink serving cells having no control resource set CORESET grouping or having one CORESET group and a number of configured downlink serving cells having two CORESET groups; determining, by the UE, whether to signal a value representing a physical downlink control channel (PDCCH) monitoring capability across all downlink serving cells based at least in part on a multiplication factor for a serving cell having two CORESET groups; determining, by the UE, (i) in response to determining that a value indicating a PDCCH monitoring capability is not to be signaled, a limit on the number of serving cells based on the configuration and the multiplication factor, or (ii) in response to determining that a value indicating a PDCCH monitoring capability is to be signaled, determining the limit on the number of serving cells based on the value indicating the PDCCH monitoring capability; determining, by the UE based on the limit on the number of serving cells, an overall limit of PDCCH candidates and non-overlapping control channel elements (CCEs) to be monitored in a timeslot of a cell group and a per-cell limit of PDCCH candidates and non-overlapping CCEs to be monitored in a timeslot of each cell scheduled in cells without CORESET grouping or with one CORESET group and cells with two CORESET groups; as well as A downlink control channel is received in a time slot by performing blind decoding operations on CCEs up to the total limit and up to the per-cell limit.

2. The method of claim 1, wherein receiving the downlink control channel further comprises, for a primary cell: subtracting blind detection and control channel elements corresponding to a common search space set from a per-cell restriction on the primary cell; decoding the UE-specific search space starting from the lowest index and deducting the number of blind detection and CCEs used for decoding of each index from a per-cell limit for the primary cell; as well as The decoding is stopped when the number of blind detection or control channel elements configured for a next index is greater than a remaining number of PDCCH candidates or non-overlapping CCEs in a per-cell restriction of the primary cell.

3. The method of claim 1, wherein the per-cell restriction of a cell having two CORESET groups comprises a per-CORESET group restriction.

4. The method of claim 3, wherein the per-CORESET group limit is equal to the per-cell limit for a cell having two CORESET groups divided by the multiplication factor, or is equal to the per-cell limit for a cell having no CORESET grouping or having one CORESET group.

5. The method of claim 1 , wherein determining, by the UE, whether to signal a value representing a PDCCH monitoring capability across all downlink serving cells comprises: The value is determined to be signaled when the UE is capable of receiving from a first number of cells having no CORESET grouping or one CORESET group and a second number of cells having two CORESET groups and a sum of the first number and the multiplication factor multiplied by the second number is greater than a threshold.

6. The method of claim 5, further comprising signaling the numerical value representing the PDCCH monitoring capability across all downlink serving cells, having a value that is less than or equal to the sum of the first number of cells without CORESET grouping or with one CORESET group and the multiplication factor multiplied by the second number of cells with two CORESET groups.

7. The method of claim 1 , wherein determining, by the UE, the limit on the number of serving cells based on the configuration and the multiplication factor comprises: The limit on the number of serving cells is determined as a sum of the number of configured downlink serving cells with no CORESET grouping or with one CORESET group and the product of the multiplication factor multiplied by the number of configured downlink serving cells with two CORESET groups.

8. The method of claim 1 , wherein determining, by the UE based on the number limit of serving cells, an overall limit on a cell group and a per-cell limit on each scheduled cell among cells without CORESET grouping or with one CORESET group and cells with two CORESET groups comprises: determining that a sum of the number of configured downlink serving cells with no CORESET grouping or with one CORESET group and the multiplication factor multiplied by the number of configured downlink serving cells with two CORESET groups is less than or equal to the limit on the number of serving cells; Determine the per-cell restriction for cells without CORESET grouping or with one CORESET group as the value of the subcarrier spacing SCS of the serving cell without CORESET grouping or with one CORESET group; as well as The per-cell restriction for a cell with two CORESET groups is determined as the product of the multiplication factor and the value of the SCS for a serving cell with no CORESET grouping or with one CORESET group.

9. The method of claim 1 , wherein determining, by the UE, the overall limit based on the limit on the number of serving cells and the per-cell limit for cells with no CORESET grouping or with one CORESET group and for cells with two CORESET groups comprises: determining that a sum of the number of configured downlink serving cells with no CORESET grouping or with one CORESET group and the multiplication factor multiplied by the number of configured downlink serving cells with two CORESET groups is greater than the limit on the number of serving cells; as well as The total limit for a cell group with an SCS is determined as the floor of a value calculated by multiplying the limit on the number of serving cells by the value of the SCS for serving cells with no CORESET grouping or with one CORESET group by the ratio of the sum of the number of configured downlink serving cells for the SCS with no CORESET grouping or with one CORESET group and the multiplication factor by the number of configured downlink serving cells with two CORESET groups for the SCS, and the sum of the total number of configured downlink serving cells for the cell group with no CORESET grouping or with one CORESET group and the multiplication factor by the total number of configured downlink serving cells with two CORESET groups for the cell group.

10. The method of claim 9, wherein determining, by the UE, the overall limit based on the limit on the number of serving cells and the per-cell limit for cells with no CORESET grouping or with one CORESET group and for cells with two CORESET groups comprises: determining a per-cell limit for a cell with no CORESET grouping or with one CORESET group as the minimum of: the value of the SCS of the serving cell with no CORESET grouping or with one CORESET group and the total limit for the cell group for that SCS; as well as The per-cell limit for a cell with two CORESET groups is determined as the minimum of the multiplication factor times the value of the SCS for a serving cell with no CORESET grouping or with one CORESET group and the total limit for the cell group for that SCS.

11. The method of claim 1, wherein the multiplication factor has a value between 1 and 2, inclusive.

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