Relaxed control channel elements and blind decoding oversubscription and discard for NR ultra-reliable low-latency communications

Abstract

The present disclosure describes methods, systems, and devices for wireless communications. In general, the described techniques provide for effectively limiting the number of blind decoding attempts or control channel elements (CCEs) that a user equipment (UE) is configured to monitor to limit complexity at the UE. When the UE is configured to monitor CCEs in multiple spans in a time slot using blind decoding for control information from a base station, the UE can be configured to perform discarding of blind decoding candidates or CCEs in a first time span in the time slot. In other words, the UE can identify a discard rule to discard CCE monitoring opportunities or blind decoding attempts that exceed a maximum number of non-overlapping CCEs per span or a maximum number of blind decoding attempts per span, respectively, and the UE can apply the discard rule to the first time span within the time slot.

Description

[0001] Cross-references

[0002] This patent application claims the benefit of U.S. Provisional Patent Application No. 62 / 933,351, filed by Hosseini et al. on November 8, 2019, entitled “Relaxed Control Channel Elements and Blind Decoding Oversubscription and Discarding for New Air Interface Ultra-Reliable Low Latency Communications”, and U.S. Provisional Patent Application No. 62 / 977,106, filed by Hosseini et al. in February 2019, entitled “Relaxed Control Channel Elements and Blind Decoding Oversubscription and Discarding for New Air Interface Ultra-Reliable Low Latency Communications”; and U.S. Patent Application No. 17 / 090,657, filed by Hosseini et al. on November 5, 2020, entitled “Relaxed Control Channel Elements and Blind Decoding Oversubscription and Discarding for New Air Interface Ultra-Reliable Low Latency Communications”; each is assigned to the assignee of this agreement. Background Art

[0003] The following generally relates to wireless communications, including relaxed control channel elements (CCEs) for New Radio (NR) ultra-reliable low latency communications (URLLC) and blind decoding overbooking and dropping.

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, etc. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems, such as long term evolution (LTE) systems, LTE advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems, which may be referred to as NR systems. These systems may employ techniques such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM).

[0005] A wireless multiple access communication system may include multiple base stations or network access nodes, each of which supports communication of multiple communication devices simultaneously, which may also be referred to as user equipment (UE). In some wireless communication systems, a base station may send control information to a UE in a physical downlink control channel (PDCCH), and the UE may be configured to monitor multiple PDCCH candidates for a PDCCH including control information from a base station. Specifically, the UE may perform blind decoding on each of the multiple PDCCH candidates to identify a PDCCH with control information from a base station. Improved techniques for supporting blind decoding may be required. Summary of the invention

[0006] The described techniques relate to improved methods, systems, devices, and apparatus that support relaxed control channel elements (CCEs) and blind decoding oversubscription and discarding for new radio (NR) ultra-reliable low-latency communications (URLLC). In general, the described techniques effectively limit the number of blind decoding attempts or CCEs that a user equipment (UE) is configured to monitor to limit the complexity at the UE. When the UE is configured to monitor CCEs in multiple spans in a timeslot using blind decoding for control information from a base station, the UE may be configured to perform discarding of blind decoding candidates or CCEs in a subset of the spans (e.g., rather than all spans). In other words, the UE may identify a discard rule to discard CCE monitoring opportunities or blind decoding attempts that exceed the maximum number of non-overlapping CCEs per span or the maximum number of blind decoding attempts per span, respectively, and the UE may apply the discard rule to spans that are less than all spans within the timeslot. For example, in some embodiments, the UE may apply the discard rule to the first span within the timeslot.

[0007] A method of wireless communication at a UE is described. The method may include determining that the UE is configured to monitor CCEs in a CORESET using blind decoding according to at least one of a maximum number of blind decoding attempts per span within a time slot or a maximum number of non-overlapping control channel elements per span within a time slot, identifying a drop rule for the UE to drop control channel element monitoring opportunities or blind decoding attempts that exceed the maximum number of non-overlapping control channel elements per span or the maximum number of blind decoding attempts per span, respectively, and applying the drop rule to spans less than all spans within the time slot.

[0008] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to determine that the UE is configured to monitor CCEs in a CORESET using blind decoding according to at least one of a maximum number of blind decoding attempts per span in a time slot or a maximum number of non-overlapping control channel elements per span in a time slot, identify a discard rule for the UE to discard control channel element monitoring opportunities or blind decoding attempts that exceed the maximum number of non-overlapping control channel elements per span or the maximum number of blind decoding attempts per span, respectively, and apply the discard rule to spans less than all spans in the time slot.

[0009] Another apparatus for wireless communication at a UE is described. The apparatus may include means for determining that the UE is configured to monitor CCEs in a CORESET using blind decoding according to at least one of a maximum number of blind decoding attempts per span within a time slot or a maximum number of non-overlapping control channel elements per span within a time slot, means for identifying a drop rule for the UE to drop control channel element monitoring opportunities or blind decoding attempts that exceed the maximum number of non-overlapping control channel elements per span or the maximum number of blind decoding attempts per span, respectively, and means for applying the drop rule to spans less than all spans within the time slot.

[0010] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to determine that the UE is configured to monitor CCEs in a CORESET using blind decoding according to at least one of a maximum number of blind decoding attempts per span within a time slot or a maximum number of non-overlapping control channel elements per span within a time slot, identify a drop rule for the UE to drop control channel element monitoring opportunities or blind decoding attempts that exceed the maximum number of non-overlapping control channel elements per span or the maximum number of blind decoding attempts per span, respectively, and apply the drop rule to spans less than all spans within the time slot.

[0011] Some examples of the methods, equipment, and non-transitory computer-readable media described herein may also include operations, features, devices, or instructions for determining a fixed span in which a UE can apply a discard rule within a time slot. In these examples of the methods, equipment, and non-transitory computer-readable media described herein, applying a discard rule to a span of less than all spans within a time slot may include operations, features, devices, or instructions for discarding one or more control channel element monitoring opportunities or one or more blind decoding attempts for a fixed span. In some examples of the methods, equipment, and non-transitory computer-readable media described herein, a fixed span may include a first time span within a time slot. In some examples of the methods, equipment, and non-transitory computer-readable media described herein, a fixed span may include a span in which a common search space (CSS) exists. In some examples of the methods, equipment, and non-transitory computer-readable media described herein, applying a discard rule to a span of less than all spans within a time slot may include operations, features, devices, or instructions for discarding one or more CCE monitoring opportunities or one or more blind decoding attempts for multiple spans in which a CCS exists. In some examples of the methods, equipment, and non-transitory computer-readable media described herein, applying a discard rule to spans less than all spans within a time slot may include operations, features, devices, or instructions for discarding one or more control channel element monitoring opportunities or one or more blind decoding attempts for multiple spans in which a CCS exists and when the slot is used to communicate with a primary cell or a primary and secondary cell.

[0012] In some examples of methods, apparatus, and non-transitory computer-readable media described herein, applying a drop rule to spans less than all spans within a time slot may include operations, features, means, or instructions for avoiding applying the drop rule in multiple spans that do not include a CSS. In some examples of methods, apparatus, and non-transitory computer-readable media described herein, applying a drop rule to spans less than all spans within a time slot may include operations, features, means, or instructions for avoiding applying the drop rule to any span within a time slot based on a time slot that does not include a CSS.

[0013] Some examples of methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, modules, or instructions for determining a maximum number of spans to which a UE may apply a discard rule, wherein applying the discard rule to spans less than all spans within a time slot may be based on the maximum number of spans determined by the UE. In some examples of methods, apparatus, and non-transitory computer-readable media described herein, operations, features, devices, or instructions for determining the maximum number of spans may be based on UE capabilities. In such examples, some examples of methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, devices, or instructions for sending UE capabilities to a base station and, based on the UE capabilities, identifying multiple spans within a time slot that include a CSS.

[0014] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the maximum number of spans may be common for different span timing and length configurations of the UE. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the maximum number of spans may be different for different span timing and length configurations of the UE. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, determining the maximum number of spans may include operations, features, means, or instructions for determining the maximum number of spans to which the UE can apply a discard rule based on a minimum processing time capability of a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH) of a cell communicating with the UE via a time slot.

[0015] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, devices, or instructions for determining a set of fixed spans within a time slot in which the UE can apply a discard rule. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, applying the discard rule to spans less than all spans within the time slot may include discarding one or more CCE monitoring opportunities or one or more blind decoding attempts for the set of fixed spans. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of fixed spans includes a first time span within the time slot. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of fixed spans includes at least one span in which a CSS exists.

[0016] A method for wireless communication at a base station is described. The method may include: identifying a maximum number of spans per time slot to which a UE may apply a discard rule, wherein the discard rule indicates that the UE will discard CCE monitoring opportunities or blind decoding attempts according to the discard rule, configuring one or more CSSs within a span of a time slot for communication with the UE so that the number of spans within the time slot including the CSS is less than or equal to the maximum number of spans per time slot; and indicating the CSS configuration to the UE according to the configuration.

[0017] An apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executed by the processor to enable the apparatus to identify a maximum number of spans of each time slot in which a UE may apply a discard rule, wherein the discard rule indicates that the UE will discard CCE monitoring opportunities or blind decoding attempts according to the discard rule, configure one or more CSSs within the span of a time slot for communication with the UE, so that the number of spans within the time slot including the CSS is less than or equal to the maximum number of spans per time slot; and indicate the CSS configuration to the UE according to the configuration.

[0018] Another apparatus for wireless communication at a base station is described. The apparatus may include means for identifying a maximum number of spans per time slot to which a UE may apply a discard rule, wherein the discard rule indicates that the UE will discard CCE monitoring opportunities or blind decoding attempts according to the discard rule, means for configuring one or more CSSs within a span of a time slot for communication with the UE, such that the number of spans within the time slot including the CSS is less than or equal to the maximum number of spans per time slot; and means for indicating the CSS configuration to the UE according to the configuration.

[0019] A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to identify a maximum number of spans per time slot in which a UE can apply a discard rule, wherein the discard rule indicates that the UE will discard CCE monitoring opportunities or blind decoding attempts according to the discard rule, configure one or more CSSs within the span of the time slot for communication with the UE so that the number of spans within the time slot including the CSS is less than or equal to the maximum number of spans per time slot; and indicate the CSS configuration to the UE according to the configuration.

[0020] In some examples of methods, apparatus, and non-transitory computer-readable media described herein, the maximum number of spans may be common for different span timing and length configurations of the UE. In some examples of methods, apparatus, and non-transitory computer-readable media described herein, the maximum number of spans may be different for different span timing and length configurations of the UE. In some examples of methods, apparatus, and non-transitory computer-readable media described herein, the maximum number of spans may be based on a PDSCH or PUSCH minimum processing time capability of a cell associated with a base station that communicates with the UE via a time slot.

[0021] A method for wireless communication at a base station is described. The method may include: identifying a fixed span of each time slot in which a UE may apply a discard rule, wherein the discard rule indicates that the UE will discard a CCE monitoring opportunity or a blind decoding attempt according to the discard rule, configuring one or more CSSs within the span of the time slot for communication with the UE, so that at least the fixed span within the time slot includes the CSS; and indicating the CSS configuration to the UE according to the configuration.

[0022] An apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executed by the processor to enable the apparatus to identify a fixed span of each time slot in which a UE may apply a discard rule, wherein the discard rule indicates that the UE will discard a CCE monitoring opportunity or a blind decoding attempt according to the discard rule, configure one or more CSSs within the span of the time slot for communication with the UE, so that at least the fixed span within the time slot includes the CSS; and indicate the CSS configuration to the UE according to the configuration.

[0023] Another apparatus for wireless communication at a base station is described. The apparatus may include: means for identifying a fixed span of each time slot in which a UE may apply a discard rule, wherein the discard rule indicates that the UE will discard a CCE monitoring opportunity or a blind decoding attempt according to the discard rule, means for configuring one or more CSSs within the span of the time slot for communication with the UE, so that at least the fixed span within the time slot includes a CSS device; and means for indicating the CSS configuration to the UE according to the configuration.

[0024] A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to identify a fixed span of each time slot in which a UE can apply a discard rule, wherein the discard rule indicates that the UE will discard a CCE monitoring opportunity or a blind decoding attempt according to the discard rule, configure one or more CSSs within the span of the time slot for communication with the UE, so that at least the fixed span within the time slot includes the CSS; and indicate the CSS configuration to the UE according to the configuration.

[0025] In some examples of methods, apparatus, and non-transitory computer-readable media described herein, the fixed span is a first time span within a time slot. In some examples of methods, apparatus, and non-transitory computer-readable media described herein, the CSS is the only CSS configured within a time slot span for communicating with the UE. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 An example of a wireless communication system supporting relaxed control channel elements (CCEs) and blind decoding oversubscription and discard for New Radio (NR) Ultra Reliable Low Latency Communication (URLLC) according to aspects of the present disclosure is shown.

[0027] Figure 2 An example of a wireless communication system supporting relaxed CCE and blind decoding oversubscription and dropping for NR URLLC according to aspects of the present disclosure is shown.

[0028] Figure 3 An example of a process flow supporting relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown.

[0029] Figure 4 and Figure 5 A block diagram of an apparatus supporting relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown.

[0030] Figure 6 A block diagram of a communications manager supporting relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown.

[0031] Figure 7 A diagram of a system including devices supporting relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown.

[0032] Figure 8 and Fig. 9 A block diagram of an apparatus supporting relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown.

[0033] Fig.10 A block diagram of a communications manager supporting relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown.

[0034] Fig.11 A diagram of a system including devices supporting relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown.

[0035] Fig.12 and Fig.13 A flow chart illustrating a method for supporting relaxed CCE and blind decoding oversubscription and dropping for NR URLLC according to aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0036] In some wireless communication systems, a base station may send control information to a user equipment (UE) in a physical downlink control channel (PDCCH), and the UE may be configured to monitor multiple PDCCH candidates or control channel elements (CCEs) for a PDCCH including control information from a base station. Specifically, the UE may perform blind decoding on each of the multiple PDCCH candidates or CCEs to identify the PDCCH with control information from the base station. In some cases, in order to limit complexity, the UE may be configured to discard blind decoding candidates in time slots exceeding the maximum number of blind decoding attempts, and discard CCEs in time slots exceeding the maximum number of non-overlapping CCEs. However, in some cases, if the UE is configured to monitor PDCCH candidates in multiple spans in a time slot for control information from a base station, the limit on the number of blind decoding candidates and CCEs may be per span instead of per time slot. Therefore, the UE may be configured to perform blind decoding candidate or CCE counting and discarding multiple times per time slot (e.g., in each span in a time slot) instead of once per time slot (e.g., because each time slot may have multiple spans). As a result, the process of performing discarding may increase the complexity at the UE.

[0037] As described herein, a wireless communication system may support effective techniques for limiting blind decoding attempts or CCEs that a UE is configured to monitor to limit complexity at the UE. Specifically, when a UE is configured to monitor CCEs in multiple spans in a timeslot using blind decoding for control information from a base station, the UE may be configured to perform a discard of blind decoding candidates or CCEs in a subset of spans. That is, the UE may identify a discard rule to discard CCE monitoring opportunities or blind decoding attempts that exceed a maximum number of non-overlapping CCEs per span or a maximum number of blind decoding attempts per span, respectively, and the UE may apply the discard rule to spans that are less than all spans within a timeslot. For example, the UE may apply a discard rule to a first span within a timeslot and avoid applying the discard rule to spans outside the first span within the timeslot, or may not expect to apply the discard rule to spans outside the first span. In some cases, the UE may send an indication of the maximum number of spans in which the UE can perform blind decoding candidates and CCE discarding, and the base station may configure a common search space (CSS) within the span of a time slot such that the number of spans within a time slot including the CSS is less than or equal to the maximum number of spans per time slot indicated by the UE.

[0038] The described techniques may be implemented to achieve one or more advantages. For example, in some implementations, the described techniques may define time domain resources to which the UE may expect to apply discard rules for PDCCH monitoring and time domain resources to which the UE may not expect to apply discard rules for PDCCH monitoring. In this way, the UE may limit the complexity associated with PDCCH overbooking and discarding, which may enable one or more processing components of the UE related to PDCCH monitoring to enter sleep mode more frequently or for longer periods of time. In addition, the described techniques support the application of discard rules for PDCCH overbooking within time domain resources at a sub-slot granularity (e.g., per span rather than per time slot), which may support low-latency downlink communications.

[0039] Various aspects of the present disclosure introduced above are described herein in the context of a wireless communication system. Examples of processes and signaling exchanges supporting relaxed CCE and blind decoding overbooking and discarding for New Radio (NR) Ultra Reliable Low Latency Communication (URLLC) are then described. Various aspects of the present disclosure are further illustrated and described with reference to equipment diagrams, system diagrams, and flow charts related to relaxed CCE and blind decoding overbooking and discarding for NR URLLC.

[0040] Figure 1 An example of a wireless communication system 100 supporting relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown. The wireless communication system 100 includes a base station 105, a UE 115, and a core network 130. In some examples, the wireless communication system 100 can be a long term evolution (LTE) network, an LTE advanced (LTE-A) network, an LTE-A Pro network, or an NR network. In some cases, the wireless communication system 100 can support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low-latency communications, URLLC, or communications with low-cost and low-complexity devices.

[0041] The base station 105 may communicate wirelessly with the UE 115 via one or more base station antennas. The base station 105 described herein may include or be referred to by those skilled in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next generation NodeB or a Gigabit NodeB (any of which may be referred to as a gNB), a Home NodeB, a Home eNodeB, or other suitable terms. The wireless communication system 100 may include different types of base stations 105 (e.g., macro or small cell base stations). The UE 115 described herein may be able to communicate with various types of base stations 105 and network devices including macro eNBs, small cell eNBs, gNBs, relay base stations, etc.

[0042] Each base station 105 may be associated with a particular geographic coverage area 110 in which communications with various UEs 115 are supported. Each base station 105 may provide communications coverage for the respective geographic coverage area 110 via a communications link 125, and the communications link 125 between the base station 105 and the UE 115 may use one or more carriers. The communications link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105 (e.g., on a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH)), or a downlink transmission from the base station 105 to the UE 115 (e.g., on a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH)). Downlink transmissions may also be referred to as forward link transmissions, and uplink transmissions may also be referred to as reverse link transmissions.

[0043] The geographic coverage area 110 of the base station 105 can be divided into sectors that constitute a portion of the geographic coverage area 110, and each sector can be associated with a cell. For example, each base station 105 can provide communication coverage for a macro cell, a small cell, a hotspot, or other types of cells, or various combinations thereof. In some examples, the base station 105 can be mobile, thereby providing communication coverage for a mobile geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, and overlapping geographic coverage areas 110 associated with different technologies can be supported by the same base station 105 or different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous LTE / LTE-A / LTE-A Pro or NR network, in which different types of base stations 105 provide coverage for various geographic coverage areas 110.

[0044] The term "cell" may refer to a logical communication entity used to communicate with a base station 105 (e.g., via a carrier), and may be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID)) used to distinguish between adjacent cells operating via the same or different carriers. In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., machine-type communication (MTC), narrowband Internet-of-Thing (NB-IoT), enhanced mobile broadband (eMBB), or others) that may provide access to different types of devices. In some cases, the term "cell" may refer to a portion of a geographic coverage area 110 (e.g., a sector) on which the logical entity operates.

[0045] The term "carrier" may refer to a collection of radio spectrum resources having a defined physical layer structure for supporting communications over the communication link 125. For example, a carrier of the communication link 125 may include a portion of a radio spectrum band that operates according to a physical layer channel of a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. A carrier may be associated with a predefined frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN)) and may be located according to a channel raster discovered by the UE 115. A carrier may be downlink or uplink (e.g., in FDD mode), or may be configured to carry downlink and uplink communications (e.g., in TDD mode). In some examples, a signal waveform transmitted via a carrier may be composed of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)).

[0046] UE 115 can be dispersed throughout the wireless communication system 100, and each UE 115 can be fixed or mobile. UE 115 can also be referred to as a mobile device, a wireless device, a remote device, a handheld device or a subscriber device, or some other suitable terminology, where "device" can also be referred to as a unit, a station, a terminal or a client. UE 115 can also be a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer or a personal computer. In some examples, UE 115 can also refer to a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device or an MTC device, etc., which can be implemented in various items such as electrical appliances, vehicles, and meters.

[0047] The base stations 105 may communicate with each other and with the core network 130. For example, the base stations 105 may interface with the core network 130 via a backhaul link 132 (e.g., via an S1, N2, N3, or other interface). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105) or indirectly (e.g., via the core network 130) via a backhaul link 134 (e.g., via an X2, Xn, or other interface).

[0048] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC), which may include at least one mobility management entity (MME), at least one serving gateway (S-GW), and at least one Packet Data Network (PDN) gateway (P-GW). The MME may manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management of UEs 115 served by base stations 105 associated with the EPC. User IP packets may be delivered through the S-GW, which itself may be connected to the P-GW. The P-GW may provide IP address allocation and other functions. The P-GW may be connected to network operator IP services. Operator IP services may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or Packet-Switched (PS) streaming services.

[0049] At least some network devices, such as base stations 105, may include subcomponents, such as access network entities, which may be examples of access node controllers (ANCs). Each access network entity may communicate with UE 115 through multiple other access network transmission entities, which may be referred to as radio heads, smart radio heads, or transmit / receive points (TRPs). In some configurations, the various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or merged into a single network device (e.g., base station 105).

[0050] In some cases, the wireless communication system 100 can use both licensed and unlicensed radio spectrum bands. For example, the wireless communication system 100 can adopt License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology or NR technology in unlicensed bands such as the 5GHz industrial, scientific and medical (ISM) band. When operating in an unlicensed radio spectrum frequency band, wireless devices such as base stations 105 and UE 115 can adopt a listen-before-talk (LBT) process to ensure that the channel is clear before transmitting data. In some cases, operations in unlicensed bands can be based on carrier aggregation configuration and component carriers operating in licensed bands (e.g., LAA). Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, point-to-point transmissions, or a combination of these. Duplexing in the unlicensed spectrum can be based on frequency division duplexing (FDD), time division duplexing (TDD), or a combination of both.

[0051] In some cases, the wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In the user plane, the communication at the bearer or packet data convergence protocol (PDCP) layer may be IP-based. The radio link control (RLC) layer may perform packet segmentation and reassembly to communicate through logical channels. The medium access control (MAC) layer may perform priority processing and multiplexing of logical channels to transport channels. The MAC layer may also use a hybrid automatic repeat request (HARQ) to provide retransmission at the MAC layer to improve link efficiency. In the control plane, the radio resource control (RRC) protocol layer may provide the establishment, configuration and maintenance of an RRC connection between a UE 115 and a base station 105 or a core network 130 that supports a radio bearer for user plane data. At the physical layer, transport channels may be mapped to physical channels.

[0052] Time intervals in LTE or NR can be expressed as multiples of a basic time unit. For example, a basic time unit can refer to T s = 1 / 30,720,000 seconds sampling period. The time interval of the communication resources can be organized according to radio frames, each of which lasts for 10 milliseconds (ms), where the frame period can be expressed as T f =307,200T s A radio frame may be identified by a system frame number (SFN) ranging from 0 to 1023. Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms. A subframe may be further divided into 2 slots, each having a duration of 0.5 ms, and each slot may contain 6, 7, or 14 orthogonal frequency division multiplexing (OFDM) symbols (e.g., depending on the length of the cyclic prefix preceding each symbol period).

[0053] In some cases, a subframe may be the smallest scheduling unit of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In other cases, the smallest scheduling unit of the wireless communication system 100 may be shorter than a subframe, or may be dynamically selected (e.g., in a burst of a short TTI (sTTI), or in a selected component carrier using sTTI). In some wireless communication systems, a time slot may be further divided into multiple mini-slots containing one or more symbols. In some cases, a mini-slot or a symbol of a mini-slot may be the smallest scheduling unit. For example, the duration of each symbol may be different depending on the subcarrier spacing or the frequency band of operation. In addition, some wireless communication systems may implement time slot aggregation, in which multiple time slots or mini-slots are aggregated together and used for communication between the UE 115 and the base station 105.

[0054] In the wireless communication system 100, the base station 105 may send control information to the UE 115 via the PDCCH. The UE 115 may monitor one or more PDCCH candidates in a search space of a PDCCH including control information from the base station 105, wherein each PDCCH candidate may be a possible location of a PDCCH including control information from the base station 105. In other words, the UE 115 may blindly decode different PDCCH candidates to identify the control information sent by the base station 105. The search space may include multiple CCEs, each of which may be a group of resources that may be used to send a PDCCH. CCEs may also be grouped for larger control transmissions. In some cases, it may be appropriate to limit the number of blind decodings or PDCCH candidates in the search space of each time slot and the number of non-overlapping CCEs per time slot. Such restrictions may limit the complexity at the UE 115 because the UE 115 may be configured to monitor fewer PDCCH candidates and resources for control information from the base station 105. Tables 2 and 3 provide examples of restrictions on blind decoding and non-overlapping CCEs per time slot.

[0055] Table 1: Maximum number of PDCCH candidates monitored per time slot for downlink bandwidth portion with subcarrier spacing configuration μ∈{0,1,2,3} for a single serving cell

[0056]

[0057] Table 2: Maximum number of non-overlapping CCEs per time slot for downlink bandwidth portion with subcarrier spacing configuration μ∈{0,1,2,3} for a single serving cell

[0058]

[0059] For each scheduled cell, the UE 115 may be configured to monitor no more than a maximum number of PDCCH candidates per slot for a subcarrier spacing (SCS) configuration μ as indicated in Table 1. Or for SCS configuration μ under carrier aggregation, monitor no more than the maximum number of PDCCH candidates per time slot Specifically, UE 115 may not be configured to monitor more than Similarly, for each scheduled cell, the UE 115 may be configured to monitor no more than a maximum number of non-overlapping CCEs per time slot for the SCS configuration μ as indicated in Table 2. Or for SCS configuration μ under carrier aggregation, monitor no more than the maximum number of PDCCH candidates per time slot Specifically, UE 115 may not be configured to monitor more than Non-overlapping CCEs.

[0060] However, in some cases, because different search space sets (which may be associated with the same or different control resource sets (CORESET)) may have different periods, there may be a situation where the number of blind decoding candidates in a time slot and the number of CCEs associated with the blind decoding candidates are greater than the maximum values ​​provided in Tables 1 and 2, respectively. Such a situation may be referred to as overbooking and may be allowed on a primary cell (PCell) or a primary-secondary cell (PSCell), but not on a secondary cell (SCell). In other words, on an SCell, the restrictions described with reference to Tables 1 and 2 may be met (e.g., always). In order to handle overbooking, the UE 115 may support techniques for discarding blind decoding candidates and CCEs to limit complexity. Discarding may be specified for a user-specific search space (USS), but not for a CSS. That is, the blind decoding candidates and CCEs of a CSS set may be protected (e.g., always).

[0061] For all search space sets in time slot n, the cardinality is I css The set of CSS sets can be represented as S css , the cardinality is J uss The set of USS sets can be expressed as Suss . S uss USS Collection j (0≤j≤J uss ) can be based on the ascending order of the search space set index. css The number of PDCCH candidates counted by (i) can be expressed as Used to monitor USS set S uss The number of PDCCH candidates counted by (j) can be expressed as For a CSS set, the UE 115 may monitor the number of Non-overlapping CCE candidates. That is, for the CSS set, UE 115 can monitor all PDCCH candidates, and UE 115 can avoid discarding any blind decoding candidates or CCEs. However, for the USS set, UE 115 can monitor a subset of PDCCH candidates and a subset of CCEs. That is, UE 115 can discard blind decoding candidates and CCEs that exceed the maximum values ​​described in reference Tables 1 and 2.

[0062] In one example, for a Pcell having an active downlink bandwidth portion with SCS configuration μ in time slot n, UE 115 may allocate PDCCH candidates according to the discarding rule, and UE 115 may not desire to monitor PDCCHs in the USS set without being allocated PDCCH candidates for monitoring. Search space S uss The set of non-overlapping CCEs of (j) can be represented by V CCE (S uss (j)), and V CCE (S uss The cardinality of (j)) can be determined by the cardinality (V CCE (S uss (j))) indicates that the PDCCH candidates allocated for monitoring the CSS set and the PDCCH candidates allocated for monitoring all search space sets S can be considered. uss (k) The PDCCH candidates allocated by the search space set S are determined uss (j) Non-overlapping CCEs. The discarding rule may correspond to the following pseudo code:

[0063]

[0064] In some wireless communication systems (e.g., wireless communication systems supporting URLLC), updated PDCCH monitoring capabilities may be supported. For example, similar to PDCCH monitoring capability 3-5b, UE 115 may be configured to monitor multiple spans per time slot, where a span may correspond to a subset of OFDM symbols within a time slot. PDCCH monitoring opportunities associated with some features (e.g., in feature group (FG) 3–1), plus additional PDCCH monitoring opportunities may be in any OFDM symbol of a time slot (e.g., for case 2). For any two PDCCH monitoring opportunities belonging to different spans, assuming that at least one PDCCH monitoring opportunity is not one of the PDCCH monitoring opportunities associated with FG-3–1, there may be a minimum time interval of X OFDM symbols (including the cross-slot boundary case) between the start of the two spans in the same or different search spaces, where the length of each span is up to Y consecutive OFDM symbols of the time slot. Each span may include multiple search spaces, and if (X, Y) = (7, 3) there may be two spans in a time slot, if (X, Y) = (4, 3) there may be three spans in a time slot, and if (X, Y) = (2, 2) there may be seven spans in a time slot.

[0065] Spans cannot overlap, and each span can be contained in a single timeslot. The same span pattern can be repeated in each timeslot. The intervals between consecutive spans within a timeslot and across timeslots may not be equal, but all spans may satisfy the same (X, Y) constraints. Each monitoring opportunity may be completely contained in one span. To determine the appropriate span pattern, a bitmap b(l) may first be generated, 0≤l≤13, where b(l)=1 if symbol l of any timeslot is part of a monitoring opportunity, otherwise b(l)=0. The first span in the span pattern may start with the smallest l (where b(l)=1). The next span in the span pattern may start with the smallest span l that is not included in the previous span (where b(l)=1). The span duration may be the higher of the maximum of all CORESET durations and the minimum of Y among the candidate values ​​reported by the UE, except for the last span in a timeslot which may have a shorter duration. If the span arrangement satisfies the gap separation of at least one (X, Y) in the candidate value set reported by the UE in each time slot (including across time slot boundaries), the PDCCH monitoring configuration can meet the UE capability limitation.

[0066] In some cases, UE 115 may use various techniques to process control information for a set of monitoring opportunities within the same span. In one example, UE 115 may process one unicast downlink control information (DCI) for scheduling downlink communication and one unicast DCI for scheduling uplink communication for each scheduled component carrier on a set of monitoring opportunities for FDD. In another example, UE 115 may process one unicast DCI for scheduling downlink communication and two unicast DCIs for scheduling uplink communication on a set of monitoring opportunities for TDD for each scheduled component carrier. In yet another example, UE 115 may process two unicast DCIs for scheduling downlink communication and one unicast DCI for scheduling uplink communication on a set of monitoring opportunities for TDD for each scheduled component carrier. The number of different starting symbol indices for the span of all PDCCH monitoring opportunities for each time slot, including the PDCCH monitoring opportunity for FG-3-1, may not exceed floor(14 / X), where X is the minimum value among the values ​​reported by UE 115. The number of different starting symbol indices of the PDCCH monitoring occasions of each time slot including the PDCCH monitoring occasion of FG-3–1 may not exceed seven. In the SCell, the number of different starting symbol indices of the PDCCH monitoring occasions of each half time slot including the PDCCH monitoring occasion of FG-3–1 may not exceed four.

[0067] As described above, techniques for discarding blind decoding candidates and CCEs may be supported to limit decoding complexity at the UE 115. However, in a time slot in which the UE 115 is configured to monitor PDCCH candidates in multiple spans for control information from the base station 105, the limit on the number of blind decoding candidates and CCEs may be per span (e.g., rather than per time slot). Thus, the UE 115 may perform CCE or blind decoding candidate counting and discarding multiple times per time slot, rather than once per time slot (e.g., because there may be multiple spans per time slot), which may result in increased complexity for the UE 115. The UE 115 in the wireless communication system 100 may support efficient techniques for monitoring control information from the base station 105 with limited complexity.

[0068] Figure 2 An example of a wireless communication system 200 that supports relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown. The wireless communication system 200 includes a UE 115-a, which may be a reference Figure 1 The wireless communication system 200 also includes a base station 105-a, which may be as described with reference to Figure 1An example of a base station 105 is described. The base station 105-a can provide communication coverage for the coverage area 110-a. For example, the base station 105-a can communicate with the UE 115-a having the coverage area 110-a via resources of the carrier 205. The wireless communication system 200 can implement multiple aspects of the wireless communication system 100. For example, the UE 115-a in the wireless communication system 200 can support efficient techniques for monitoring control information from the base station 105-a with limited complexity.

[0069] For example, if the UE 115-a is configured to monitor PDCCH candidates for control information from the base station 105-a in multiple spans 215 in the time slot 210 (including span 215-a, span 215-b, and span 215-c), the UE 115-a (e.g., on a PCell or PSCell) may be expected to perform blind decoding candidates or CCE discarding in a subset of the spans 215 in the time slot 210 due to overbooking in the time slot 210. In other words, the UE 115-a may identify a discarding rule for the UE 115-a to discard CCE monitoring opportunities or blind decoding attempts that exceed a maximum number of non-overlapping CCEs per span or a maximum number of blind decoding attempts per span, respectively, and the UE 115-a may apply the discarding rule to spans less than all spans 215 in the time slot 210. In some cases, the UE 115-a may perform discarding in spans 215 where a CSS exists (e.g., it may not be necessary to perform discarding in other spans).

[0070] In some cases, the UE 115-a may perform discarding in a set of fixed spans (of the plurality of spans 215) in the time slot 210. For example, the set of fixed spans may include a single span (of the plurality of spans 215) in the time slot 210, a continuous plurality of spans (of the plurality of spans 215) starting from the time slot 210, or a continuous plurality of spans (of the plurality of spans 215) ending from the time slot 210. The set of fixed spans may also include spans of a time interval (of the plurality of spans 215) within the time slot 210 (e.g., every other span). In some cases, the UE 115-a may also perform discarding in a set of fixed spans (of the plurality of spans 215) in the time slot 210, wherein the set of fixed spans includes a first span in time (of the plurality of spans 215) in the time slot 210, or wherein the set of fixed spans is a single span including a first span in time (of the plurality of spans 215) in the time slot 210. In some cases, the UE 115-a may also perform discarding in a set of fixed spans (of the plurality of spans 215) in the time slot 210, wherein the set of fixed spans includes at least one span in which a CSS is present. For example, the CSS may be present in the time slot 210 and limited to the first span in time (of the plurality of spans 215). In some other cases, the UE 115-a may avoid performing discarding in any time slot where the CSS is not present (e.g., due to the periodicity of the CSS set, the CSS may not be present in all time slots).

[0071] Figure 3 An example of a process flow 300 for supporting relaxed CCE and blind decoding oversubscription and discarding for NR URLLC according to aspects of the present disclosure is shown. The process flow 300 shows various aspects of a technique performed by a UE 115-b, which may be a UE 115-b as described with reference to FIG. Figure 1 and Figure 2 The process flow 300 also illustrates various aspects of the technique performed by a base station 105-b, which may be a base station 105-b as described with reference to FIG. Figure 1 and Figure 2 An example of a base station 105 is described. The UE 115-b in the process flow 300 can support efficient techniques for monitoring control information from the base station 105-b with limited complexity. For example, the UE 115-b can be configured with a maximum number of spans (e.g., as a UE capability or as a pre-configuration) where the UE 115-b can perform blind decoding candidates and discarding of CCEs to limit complexity.

[0072] At 305, UE 115-b may determine a maximum number of spans to which UE 115-b is capable of applying a drop rule, either as a UE capability or as a preconfiguration. Thus, based on the maximum number of spans, UE 115-b may apply a drop rule to less than all spans within a time slot in which UE 115-b is configured to monitor a PDCCH candidate for control information from base station 105-b. In an example where UE 115-b determines the maximum number of spans based on UE capabilities, at 310, UE 115-b may send a UE capability indicating the maximum number of spans to base station 105-b. In an example where UE 115-b determines the maximum number of spans based on a preconfiguration, at 310, UE 115-b may avoid sending the UE capability to base station 105-b. In some cases, the maximum number of spans to which UE 115-b is to apply a drop rule may be the same for all X values ​​corresponding to a minimum time interval between spans (e.g., span timing) and all Y values ​​corresponding to a span length (e.g., length configuration). Alternatively, the maximum number of spans for which UE 115-b is to apply the discard rule may be different for different X and Y values.

[0073] In other cases, the maximum number of spans to which UE 115-b is to apply discard rules may be different based on whether the PCell is configured with a first or second PDSCH or PUSCH minimum processing time capability (e.g., minimum processing time capability quantity 1 or quantity 2). In such a case, UE 115-b may determine the maximum number of spans to which UE 115-b is able to apply discard rules based on the PDSCH or PUSCH minimum processing time capability of the cell with which the UE communicates via the time slot.

[0074] Additionally or alternatively, at 305, UE 115-b may determine a fixed span (or a set of fixed spans) to which UE 115-b is capable of applying a discard rule, as a UE capability or as a preconfiguration. Thus, based on the fixed span, UE 115-b may apply the discard rule to spans that are less than all spans within a timeslot in which UE 115-b is configured to monitor PDCCH candidates for control information from base station 105-b. In an example where UE 115-b determines the fixed span based on UE capabilities, at 310, UE 115-b may send a UE capability indicating a set of fixed spans to base station 105-b. In an example where UE 115-b determines the fixed span based on a preconfiguration, at 310, UE 115-b may avoid sending the UE capabilities to base station 105-b. In an example where UE 115-b identifies or otherwise determines a set of fixed spans, the set of fixed spans may include a first temporal span within a time slot (e.g., a span of the first time). In an example where UE 115-b identifies or otherwise determines a fixed span, the fixed span may be a single span and include a first temporal span within a time slot (e.g., a span of the first time).

[0075] In some implementations, such as implementations in which UE 115-b sends UE capabilities at 310, base station 105-b may receive a UE capabilities message from UE 115-b indicating a maximum number of spans or a fixed span for which UE 115-b is to apply a discard rule. At 315, base station 105-b may configure one or more CSSs within a span of a timeslot used to communicate with UE 115-b such that the number of spans including CSSs within the timeslot is less than or equal to the maximum number of spans per timeslot indicated by the UE capabilities. That is, base station 105-b may ensure that a CSS set cannot exist in more spans than the maximum number of spans in any timeslot of the PCell or PSCell indicated by UE 115-b.

[0076] Additionally or alternatively, at 315, the base station 105-b may configure one or more CSSs within the span of the time slot used to communicate with the UE 115-b, so that at least one span in the set of fixed spans within the time slot indicated by the UE capability includes the CSS. That is, the base station 105-b may ensure that the CSS set exists in (e.g., exists only in) the set of fixed spans in any time slot of the PCell or PSCell. In some cases, at least one span of the set of fixed spans may be the span of the first time within the time slot. In some cases, the CSS may be the only CSS configured within the span of the time slot used to communicate with the UE 115-b. In some cases, the base station 105-b may configure a limited number of CSSs. A limited number of CSSs may be included in at least one (but in some cases all) spans in the set of fixed spans within the time slot. For example, the base station 105-b may configure a single CSS to be included in the span of the first time within the time slot. In some cases, configuring a single CSS to be included in a first time span within a timeslot may be performed regardless of UE capabilities because base station 105-b may assume that UE 115-b is capable of discarding a first time span within a timeslot that includes the only CSS in the timeslot. Additionally or alternatively, base station 105-b may identify a fixed span (or a set of fixed spans) in which UE 115-b will apply a discard rule without signaling from UE 115-b (e.g., based on a preconfiguration), and may configure one or more CSSs within a span of a timeslot that includes at least the fixed span.

[0077] At 320, the base station 105-b may then indicate the CSS configuration to the UE 115-b according to the configuration at 315. For example, the CSS configuration may indicate that the number of spans within the time slots that include the CSS is less than or equal to the maximum number of spans per time slot indicated by the UE capabilities, or the CSS configuration may indicate that at least one span of the set of fixed spans within the time slots indicated by the UE capabilities includes the CSS.

[0078] At 325, UE 115-b may apply the discard rule to the maximum number of spans or the fixed span. In some examples, the fixed span may include a first time span of the time slot, and UE 115-b may apply the discard rule to the first time span of the time slot accordingly.

[0079] Figure 4A block diagram 400 of a device 405 supporting relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown. The device 405 can be an example of aspects of the UE 115 as described herein. The device 405 may include a receiver 410, a communication manager 415, and a transmitter 420. The device 405 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0080] The receiver 410 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to relaxed CCE and blind decoding oversubscription and discard for NR URLLC, etc.). The information may be passed to other components of the device 405. The receiver 410 may be a reference Figure 7 Examples of aspects of transceiver 720 are described. Receiver 410 may utilize a single antenna or a collection of antennas.

[0081] The communication manager 415 may determine that the UE is configured to monitor control channel elements in the control resource set using blind decoding according to at least one of a maximum number of blind decoding attempts per span within a time slot or a maximum number of non-overlapping control channel elements per span within a time slot, identify a discard rule for the UE to discard control channel element monitoring opportunities or blind decoding attempts that exceed the maximum number of non-overlapping control channel elements per span or the maximum number of blind decoding attempts per span, respectively, and apply the discard rule to spans less than all spans within the time slot. The communication manager 415 may be an example of aspects of the communication manager 710 described herein.

[0082] The communication manager 415 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 415 or its subcomponents may be performed by a general purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

[0083] The communication manager 415 or its subcomponents can be physically located in various locations, including being distributed so that parts of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 415 or its subcomponents can be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 415 or its subcomponents can be combined with one or more other hardware components, including but not limited to input / output (I / O) components, transceivers, network servers, other computing devices, one or more other components described in the present disclosure, or combinations thereof.

[0084] Transmitter 420 can transmit signals generated by other components of device 405. In some examples, transmitter 420 can be co-located with receiver 410 in a transceiver module. For example, transmitter 420 can be a reference Figure 7 Examples of aspects of the transceiver 720 are described. The transmitter 420 may utilize a single antenna or a collection of antennas.

[0085] In some examples, the communication manager 415 can be implemented as an integrated circuit or chipset for a mobile device modem, and the receiver 410 and the transmitter 420 can be implemented as analog components (e.g., amplifiers, filters, antennas) coupled to the mobile device modem to enable wireless transmission and reception on one or more frequency bands.

[0086] The communication manager 415 may be implemented to achieve one or more potential advantages. In some implementations, the communication manager 415 may identify a fixed span, wherein the communication manager 415 may apply a drop rule to resolve PDCCH overbooking within the fixed span (e.g., the PDCCH overbooking may be constrained within the fixed span). In this way, the communication manager 415 or one or more processing components of the communication manager 415 associated with the application of the drop rule may apply the drop rule within the fixed span and avoid applying the drop rule outside the fixed span, which may cause the communication manager 415 or one or more processing components of the communication manager 415 associated with the application of the drop rule to enter a sleep mode more frequently or for longer periods of time. In this way, the communication manager 415 may consume less power, which may improve power conservation and increase battery life of the device 405.

[0087] Figure 5A block diagram 500 of a device 505 supporting relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown. The device 505 can be an example of aspects of the device 405 or UE 115 as described herein. The device 505 may include a receiver 510, a communication manager 515, and a transmitter 530. The device 505 may also include a processor. Each of these components can communicate with each other (e.g., via one or more buses).

[0088] The receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to relaxed CCE and blind decoding oversubscription and discard for NR URLLC, etc.). The information may be passed to other components of the device 505. The receiver 510 may be a reference Figure 7 Examples of aspects of transceiver 720 are described. Receiver 510 may utilize a single antenna or a collection of antennas.

[0089] The communication manager 515 may be an example of aspects of the communication manager 415 as described herein. The communication manager 515 may include a blind decoder 520 and a discard manager 525. The communication manager 515 may be an example of aspects of the communication manager 710 as described herein.

[0090] The blind decoder 520 may determine that the UE is configured to monitor control channel elements in the control resource set using blind decoding based on at least one of a maximum number of blind decoding attempts per span within a time slot or a maximum number of non-overlapping control channel elements per span within a time slot. The discard manager 525 may identify a discard rule for the UE to discard control channel element monitoring opportunities or blind decoding attempts that exceed the maximum number of non-overlapping control channel elements per span or the maximum number of blind decoding attempts per span, respectively, and apply the discard rule to spans less than all spans within a time slot.

[0091] Transmitter 530 can transmit signals generated by other components of device 505. In some examples, transmitter 530 can be co-located with receiver 510 in a transceiver module. For example, transmitter 530 can be a reference Figure 7 Examples of aspects of the transceiver 720 are described. The transmitter 530 may utilize a single antenna or a collection of antennas.

[0092] Figure 6A block diagram 600 of a communication manager 605 supporting relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown. The communication manager 605 can be an example of aspects of the communication manager 415, the communication manager 515, or the communication manager 710 described herein. The communication manager 605 may include a blind decoder 610, a discard manager 615, a UE capability manager 620, and a CSS manager 625. Each of these modules can communicate with each other directly or indirectly (e.g., via one or more buses).

[0093] The blind decoder 610 may determine that the UE is configured to monitor control channel elements in the control resource set using blind decoding according to at least one of a maximum number of blind decoding attempts per span within a time slot or a maximum number of non-overlapping control channel elements per span within a time slot. The discard manager 615 may identify a discard rule for the UE to discard control channel element monitoring opportunities or blind decoding attempts that exceed the maximum number of non-overlapping control channel elements per span or the maximum number of blind decoding attempts per span, respectively. In some examples, the discard manager 615 may apply the discard rule to spans less than all spans within a time slot.

[0094] In some examples, the discard manager 615 may discard one or more control channel element monitoring opportunities or one or more blind decoding attempts only for multiple spans where there is a common search space. In some examples, the discard manager 615 may discard one or more control channel element monitoring opportunities or one or more blind decoding attempts for multiple spans where there is a common search space and when the slot is used to communicate with the primary cell or the primary and secondary cells. In some examples, the discard manager 615 may avoid applying the discard rule in multiple spans that do not include the common search space. In some examples, based on the time slot not including the common search space, the discard manager 615 may avoid applying the discard rule to any span within the time slot.

[0095] The UE capability manager 620 may determine a maximum number of spans in which the UE will apply a discard rule, wherein applying the discard rule to spans less than all spans within a time slot is based at least in part on the maximum number of spans determined by the UE. In some examples, the maximum number of spans may be based on the UE capabilities, and in such examples, the UE capability manager 620 may send the UE capabilities to the base station. The CSS manager 625 may identify multiple spans within a time slot that include a common search space based on the UE capabilities. In some cases, the determined maximum number of spans is common for different span timing and length configurations of the UE. In some cases, the determined maximum number of spans is different for different span timing and length configurations of the UE.

[0096] In some examples, the UE capability manager 620 may determine the maximum number of spans to which the UE can apply a discard rule based on the PDSCH or PUSCH minimum processing time capability of the cell communicating with the UE through the time slot. In some examples, the UE capability manager 620 may determine a set of fixed spans within the time slot in which the UE can apply the discard rule. In such an example, the discard manager 615 may discard one or more control channel element monitoring opportunities or one or more blind decoding attempts only for multiple spans in which a common search space exists, so that applying the discard rule to spans less than all spans within the time slot may include discarding one or more control channel element monitoring opportunities or one or more blind decoding attempts for the set of fixed spans. In some cases, the set of fixed spans includes a first time span within the time slot. In some cases, the set of fixed spans includes at least one span in which a CSS exists.

[0097] In some examples, the UE capability manager 620 may determine a fixed span within a timeslot in which the UE is to apply a discard rule. In such examples, the discard manager 615 may, for the fixed span, discard one or more control channel element monitoring opportunities or one or more blind decoding attempts, such that applying the discard rule to spans less than all spans within the timeslot may include, for the fixed span, discarding one or more control channel element monitoring opportunities or one or more blind decoding attempts. In some cases, the fixed span may include a first time span within the timeslot. In some cases, the fixed span includes a span in which a CSS exists.

[0098] Figure 7 A diagram of a system 700 including a device 705 supporting relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown. The device 705 may be an example of or include components of a device 405, a device 505, or a UE 115 as described herein. The device 705 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communication manager 710, an I / O controller 715, a transceiver 720, an antenna 725, a memory 730, and a processor 740. These components may be in electronic communication via one or more buses (e.g., a bus 745).

[0099] The communication manager 710 can determine that the UE is configured to monitor control channel elements in a control resource set using blind decoding based on at least one of a maximum number of blind decoding attempts per span within a time slot or a maximum number of non-overlapping control channel elements per span within a time slot, identify a discard rule for the UE to discard control channel element monitoring opportunities or blind decoding attempts that exceed the maximum number of non-overlapping control channel elements per span or the maximum number of blind decoding attempts per span, respectively, and apply the discard rule to spans less than all spans within the time slot.

[0100] I / O controller 715 can manage input and output signals for device 705. I / O controller 715 can also manage peripheral devices that are not integrated into device 705. In some cases, I / O controller 715 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 715 can utilize a computer such as a Or other known operating systems. In other cases, I / O controller 715 can represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 715 can be implemented as part of a processor. In some cases, a user can interact with device 705 via I / O controller 715 or via hardware components controlled by I / O controller 715.

[0101] The transceiver 720 may communicate bidirectionally via one or more antennas, wired or wireless links as described herein. For example, the transceiver 720 may represent a wireless transceiver and may communicate bidirectionally with other wireless transceivers. The transceiver 720 may also include a modem for modulating packets and providing the modulated packets to an antenna for transmission, and demodulating packets received from an antenna.

[0102] In some cases, a wireless device may include a single antenna 725. However, in some cases, a device may have multiple antennas 725, which may be able to send or receive multiple wireless transmissions simultaneously.

[0103] The memory 730 may include random access memory (RAM) and read-only memory (ROM). The memory 730 may store computer-readable, computer-executable code 735, which includes instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 730 may contain, among other things, a basic I / O system (BIOS), which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0104] The processor 740 may include an intelligent hardware device (e.g., a general purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 740 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 740. The processor 740 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 730) to cause the device 705 to perform various functions (e.g., functions or tasks to support relaxed CCE and blind decoding overbooking and discarding for NR URLLC).

[0105] The code 735 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 735 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some cases, the code 735 may not be directly executed by the processor 740, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0106] Figure 8 A block diagram 800 of an apparatus 805 supporting relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown. The apparatus 805 may be an example of aspects of a base station 105 as described herein. The apparatus 805 may include a receiver 810, a communication manager 815, and a transmitter 820. The apparatus 805 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0107] The receiver 810 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to relaxed CCE and blind decoding oversubscription and discard for NR URLLC, etc.). The information may be passed to other components of the device 805. The receiver 810 may be a reference Fig.11 Examples of aspects of the transceiver 1120 are described. The receiver 810 may utilize a single antenna or a collection of antennas.

[0108] In some examples, the communication manager 815 can identify a maximum number of spans per time slot to which the UE can apply a discard rule, wherein the discard rule indicates that the UE will discard control channel element monitoring opportunities or blind decoding attempts according to the discard rule, one or more common search spaces within the span of a time slot configured for communicating with the UE, such that the number of spans within the time slot that include common search spaces is less than or equal to the maximum number of spans per time slot, and indicate the common search space configuration to the UE according to the configuration.

[0109] Additionally or alternatively, the communication manager 815 can identify a fixed span within a time slot to which the UE can apply a discard rule, wherein the discard rule indicates that the UE is to discard a control channel element monitoring opportunity or a blind decoding attempt according to the discard rule, one or more common search spaces within a span of a time slot configured for communication with the UE, such that at least the fixed span within the time slot includes the common search space, and indicate the common search space configuration to the UE according to the configuration. The communication manager 815 can be an example of aspects of the communication manager 1110 described herein.

[0110] The communication manager 815 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 815 or its subcomponents may be performed by a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

[0111] The communication manager 815 or its subcomponents can be physically located in various locations, including being distributed so that part of the functionality is implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 815 or its subcomponents can be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 815 or its subcomponents can be combined with one or more other hardware components, including but not limited to I / O components, transceivers, network servers, other computing devices, one or more other components described in the present disclosure, or a combination thereof.

[0112] The transmitter 820 can transmit signals generated by other components of the device 805. In some examples, the transmitter 820 can be co-located with the receiver 810 in a transceiver module. For example, the transmitter 820 can be a reference Fig.11 Examples of aspects of the transceiver 1120 are described. The transmitter 820 may utilize a single antenna or a collection of antennas.

[0113] The communication manager 815 may be implemented to achieve one or more potential advantages. In some implementations, the communication manager 815 may configure the CSS based on a fixed span (e.g., a first time span) within a time slot over which the UE 115-a may apply a drop rule for PDCCH overbooking. CSS configuration based on such a defined fixed span for PDCCH overbooking may enable the communication manager 815 to support scheduling and sending control information to one or more UEs with low latency, which may result in greater system capacity and increased throughput, among other benefits.

[0114] Fig. 9A block diagram 900 of an apparatus 905 supporting relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown. The apparatus 905 may be an example of aspects of the apparatus 805 or base station 105 as described herein. The apparatus 905 may include a receiver 910, a communication manager 915, and a transmitter 935. The apparatus 905 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0115] The receiver 910 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to relaxed CCE and blind decoding oversubscription and discard for NR URLLC, etc.). The information may be passed to other components of the device 905. The receiver 910 may be a reference Fig.11 Examples of aspects of the transceiver 1120 are described. The receiver 910 may utilize a single antenna or a collection of antennas.

[0116] Communications manager 915 may be an example of aspects of communications manager 815 as described herein. Communications manager 915 may include UE capability manager 920, CSS manager 925, and UE configuration manager 930. Communications manager 915 may be an example of aspects of communications manager 1110 described herein.

[0117] The UE capability manager 920 may identify a maximum number of spans per time slot to which the UE may apply a discard rule, wherein the discard rule indicates that the UE will discard a control channel element monitoring opportunity or a blind decoding attempt according to the discard rule. The CSS manager 925 may configure one or more common search spaces within a span of a time slot for communication with the UE such that the number of spans within the time slot including the common search space is less than or equal to the maximum number of spans per time slot. The UE configuration manager 930 may indicate the common search space configuration to the UE according to the configuration.

[0118] Additionally or alternatively, the UE capability manager 920 may identify a fixed span within a time slot in which the UE will apply a discard rule, wherein the discard rule indicates that the UE will discard a control channel element monitoring opportunity or a blind decoding attempt according to the discard rule. The CSS manager 925 may configure one or more common search spaces within a span of a time slot for communicating with the UE, such that at least the fixed span within the time slot includes a common search space. The UE configuration manager 930 may indicate a common search space configuration to the UE according to the configuration.

[0119] The transmitter 935 can transmit signals generated by other components of the device 905. In some examples, the transmitter 935 can be co-located with the receiver 910 in a transceiver module. For example, the transmitter 935 can be a reference Fig.11 Examples of aspects of the transceiver 1120 are described. The transmitter 935 may utilize a single antenna or a collection of antennas.

[0120] Fig.10 A block diagram 1000 of a communication manager 1005 supporting relaxed CCE and blind decoding oversubscription and discard for NR URLLC according to aspects of the present disclosure is shown. The communication manager 1005 can be an example of aspects of the communication manager 815, the communication manager 915, or the communication manager 1110 described herein. The communication manager 1005 can include a UE capability manager 1010, a CSS manager 1015, and a UE configuration manager 1020. Each of these modules can communicate with each other directly or indirectly (e.g., via one or more buses).

[0121] The UE capability manager 1010 may identify a maximum number of spans per time slot to which the UE may apply a discard rule, wherein the discard rule indicates that the UE will discard a control channel element monitoring opportunity or a blind decoding attempt according to the discard rule. The CSS manager 1015 may configure one or more common search spaces within a span of a time slot for communication with the UE such that the number of spans within the time slot including the common search space is less than or equal to the maximum number of spans per time slot. The UE configuration manager 1020 may indicate the common search space configuration to the UE according to the configuration.

[0122] In some cases, the maximum number of spans is common for different span timing and length configurations of the UE. In some cases, the maximum number of spans is different for different span timing and length configurations of the UE. In some cases, the maximum number of spans is based on the PDSCH or PUSCH minimum processing time capability of a cell associated with a base station that communicates with the UE through a time slot. In some cases, at least one span of the set of fixed spans is a span of the first time within a time slot. In some cases, the common search space is the only common search space configured within the time slot span used to communicate with the UE.

[0123] In some examples, the UE capability manager 1010 can identify a fixed span within a time slot to which the UE can apply a discard rule, wherein the discard rule indicates that the UE will discard a control channel element monitoring opportunity or a blind decoding attempt according to the discard rule. In some examples, the CSS manager 1015 can configure one or more common search spaces within the span of a time slot for communicating with the UE, so that at least the fixed span within the time slot includes a common search space. In some examples, the UE configuration manager 1020 can indicate the common search space configuration to the UE according to the configuration. In some cases, the fixed span is the first time span within the time slot. In some cases, the common search space is the only common search space configured within the time slot span for communicating with the UE.

[0124] Fig.11 A diagram of a system 1100 including support for relaxed CCE and blind decoding oversubscription and discard identification 1105 for NR URLLC according to aspects of the present disclosure is shown. Device 1105 may be an example of, or include components of, device 805, device 905, or base station 105 described herein. Device 1105 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communications manager 1110, a network communications manager 1115, a transceiver 1120, an antenna 1125, a memory 1130, a processor 1140, and an inter-station communications manager 1145. These components may be in electronic communication via one or more buses (e.g., bus 1150).

[0125] In some examples, the communication manager 1110 can identify a maximum number of spans per time slot to which the UE can apply a discard rule, wherein the discard rule indicates that the UE will discard control channel element monitoring opportunities or blind decoding attempts based on the discard rule, configure one or more common search spaces within the span of the time slot for communicating with the UE so that the number of spans within the time slot including the common search space is less than or equal to the maximum number of spans per time slot, and indicate the common search space configuration to the UE based on the configuration.

[0126] Additionally or alternatively, the communication manager 1110 can identify a fixed span within a time slot to which the UE can apply a discard rule, wherein the discard rule indicates that the UE will discard a control channel element monitoring opportunity or a blind decoding attempt according to the discard rule, configure one or more common search spaces within the span of the time slot for communicating with the UE, so that at least the fixed span within the time slot includes the common search space, and indicate the common search space configuration to the UE according to the configuration.

[0127] The network communications manager 1115 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network communications manager 1115 may manage the delivery of data communications for client devices, such as one or more UEs 115.

[0128] The transceiver 1120 may communicate bidirectionally via one or more antennas, wired or wireless links as described herein. For example, the transceiver 1120 may represent a wireless transceiver and may communicate bidirectionally with other wireless transceivers. The transceiver 1120 may also include a modem for modulating packets and providing the modulated packets to an antenna for transmission, and demodulating packets received from an antenna.

[0129] In some cases, a wireless device may include a single antenna 1125. However, in some cases, a device may have multiple antennas 1125, which may be able to send or receive multiple wireless transmissions simultaneously.

[0130] Memory 1130 may include RAM, ROM, or a combination thereof. Memory 1130 may store computer-readable code 1135, which includes instructions that, when executed by a processor (e.g., processor 1140), cause the device to perform various functions described herein. In some cases, memory 1130 may contain, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0131] Processor 1140 may include an intelligent hardware device (e.g., a general purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, processor 1140 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into processor 1140. Processor 1140 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1130) to cause device 1105 to perform various functions (e.g., functions or tasks that support blind decoding oversubscription and discarding for NR URLLC relaxed CCEs).

[0132] The inter-station communication manager 1145 may manage communications with other base stations 105 and may include a controller or scheduler for controlling communications with UE 115 in coordination with other base stations 105. For example, the inter-station communication manager 1145 may coordinate the scheduling of transmissions to UE 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communication manager 1145 may provide an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between base stations 105.

[0133] The code 1135 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1135 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some cases, the code 1135 may not be directly executable by the processor 1140, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0134] Fig.12A flow chart illustrating a method 1200 for supporting relaxed CCE and blind decoding oversubscription and discarding for NR URLLC according to aspects of the present disclosure is shown. The operations of the method 1200 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1200 may be implemented by reference to Figures 4 to 7 In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the functions described herein. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described herein.

[0135] At 1205, the UE may determine that the UE is configured to monitor control channel elements in a control resource set using blind decoding based on at least one of a maximum number of blind decoding attempts per span within a time slot or a maximum number of non-overlapping control channel elements per span within a time slot. The operations of 1205 may be performed according to the methods described herein. In some examples, aspects of the operations of 1205 may be performed as described with reference to Figures 4 to 7 The described blind decoder is implemented.

[0136] At 1210, the UE may identify a discard rule for the UE to discard control channel element monitoring opportunities or blind decoding attempts that exceed a maximum number of non-overlapping control channel elements per span or a maximum number of blind decoding attempts per span, respectively. The operations of 1210 may be performed according to the methods described herein. In some examples, aspects of the operations of 1210 may be performed as described with reference to Figures 4 to 7 The described discard manager is implemented.

[0137] At 1215, the UE may apply the discard rule to spans less than all spans within the time slot. The operations of 1215 may be performed according to the methods described herein. In some examples, aspects of the operations of 1215 may be as described with reference to Figures 4 to 7 The described discard manager is implemented.

[0138] Fig.13 A flow chart illustrating a method 1300 for supporting relaxed CCE and blind decoding oversubscription and discarding for NR URLLC according to aspects of the present disclosure is shown. The operations of the method 1300 may be implemented by the base station 105 or components thereof as described herein. For example, the operations of the method 1300 may be implemented by reference to Figures 8 to 11 In some examples, the base station may execute a set of instructions to control the functional elements of the base station to perform the functions described herein. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the functions described herein.

[0139] At 1305, the base station may identify a maximum number of spans within each time slot in which the UE will apply a discard rule, wherein the discard rule indicates that the UE will discard control channel element monitoring opportunities or blind decoding attempts according to the discard rule. Additionally or alternatively, at 1305, the base station may identify a fixed span within a time slot in which the UE will apply a discard rule, wherein the discard rule indicates that the UE will discard control channel element monitoring opportunities or blind decoding attempts according to the discard rule. The operations of 1305 may be performed according to the methods described herein. In some examples, aspects of the operations of 1305 may be performed with reference to Figures 8 to 11 The UE capability manager described herein is used to perform the above operations.

[0140] At 1310, the base station may configure one or more common search spaces within a span of a time slot for communicating with the UE, such that the number of spans within the time slot that include common search spaces is less than or equal to the maximum number of spans per time slot. Additionally or alternatively, at 1310, the base station may configure one or more common search spaces within a span of a time slot for communicating with the UE, such that at least a fixed span within the time slot includes a common search space. The operations of 1310 may be performed according to the methods described herein. In some examples, aspects of the operations of 1310 may be performed as described with reference to Figures 8 to 11 The CSS manager described is used to perform the

[0141] At 1315, the base station may indicate the common search space configuration to the UE according to the configuration. The operations of 1315 may be performed according to the methods described herein. In some examples, various aspects of the operations of 1315 may be described with reference to Figures 8 to 11 Described in the UE Configuration Manager to perform.

[0142] The following provides an overview of various aspects of the disclosure:

[0143] Aspect 1: A method for wireless communication at a UE, comprising: determining that the UE is configured to use blind decoding to monitor CCEs in a control resource set based on at least one of a maximum number of blind decoding attempts per span within a time slot or a maximum number of non-overlapping CCEs per span within a time slot; identifying a discard rule for the UE to discard CCE monitoring opportunities or blind decoding attempts that exceed the maximum number of non-overlapping CCEs per span or the maximum number of blind decoding attempts per span, respectively; and applying the discard rule to spans less than all spans within a time slot.

[0144] Aspect 2: The method according to Aspect 1 also includes: determining a fixed span within a time slot in which the UE will apply a discard rule, wherein applying the discard rule to spans less than all spans within the time slot includes: for the fixed span, discarding one or more CCE monitoring opportunities or one or more blind decoding attempts.

[0145] Aspect 3: The method according to aspect 2, wherein the fixed span comprises a first time span within the time slot.

[0146] Aspect 4: The method according to any one of aspects 2 to 3, wherein the fixed span includes a span in which a CSS exists.

[0147] Aspect 5: The method according to any one of Aspects 1 to 4 further includes: determining a maximum number of spans in which the UE will apply a discard rule, wherein applying the discard rule to spans less than all spans within a time slot is at least partially based on the maximum number of spans determined by the UE.

[0148] Aspect 6: The method according to aspect 5, wherein the maximum number of spans is common for different span timing and length configurations of the UE.

[0149] Aspect 7: A method according to any one of Aspects 5 to 6, wherein the maximum number of spans is based at least in part on UE capabilities, the method further comprising: sending UE capabilities to a base station; and identifying multiple spans including CCS within a time slot based on the UE capabilities.

[0150] Aspect 8: The method according to aspect 5, wherein the maximum number of spans is different for different span timing and length configurations of the UE.

[0151] Aspect 9: A method according to any one of Aspects 5 to 8, wherein determining the maximum number of spans comprises determining the maximum number of spans to which the UE can apply discarding rules based at least in part on a minimum PDSCH or PUSCH processing time capability of a cell that communicates with the UE via a time slot.

[0152] Aspect 10: The method according to any one of aspects 1 to 9, wherein applying the discard rule to spans less than all spans in a time slot comprises: discarding one or more CCE monitoring opportunities or one or more blind decoding attempts only for multiple spans where a CSS exists.

[0153] Aspect 11: A method according to any one of Aspects 1 to 9, wherein applying a discard rule to spans less than all spans within a time slot includes: for multiple spans where a CSS exists, and when the slot is used to communicate with a Pcell or a PScell, discarding one or more CCE monitoring opportunities or one or more blind decoding attempts.

[0154] Aspect 12: The method according to any one of aspects 1 to 11, wherein applying the drop rule to spans less than all spans within a time slot comprises: avoiding applying the drop rule in a plurality of spans that do not include a CSS.

[0155] Aspect 13: The method according to any one of aspects 1 to 12, wherein applying the drop rule to spans less than all spans within the time slot comprises: avoiding applying the drop rule to any span within the time slot based on the time slot not including the CSS.

[0156] Aspect 14: A method for performing wireless communications at a base station, comprising: identifying a fixed span within a time slot in which a UE will apply a discard rule, wherein the discard rule indicates that the UE will discard a control channel element monitoring opportunity or a blind decoding attempt according to the discard rule; configuring one or more CSSs within the span of the time slot for communicating with the UE, so that at least the fixed span within the time slot includes the CSS; and indicating the CSS configuration to the UE based on the configuration.

[0157] Aspect 15: The method according to aspect 14, wherein the fixed span is a first time span within the time slot.

[0158] Aspect 16: The method according to any one of aspects 14 to 15, wherein the CSS is the only CSS configured within the span of the time slot used for communication with the UE.

[0159] Aspect 17: A method for performing wireless communications at a base station, comprising: identifying a maximum number of spans of each time slot in which a UE will apply a discard rule, wherein the discard rule indicates that the UE will discard CCE monitoring opportunities or blind decoding attempts according to the discard rule; configuring one or more CSSs within the span of a time slot for communicating with the UE, so that the number of spans within the time slot including the CSS is less than or equal to the maximum number of spans of each time slot; and indicating the CSS configuration to the UE based on the configuration.

[0160] Aspect 18: The method according to aspect 17, wherein the maximum number of spans per time slot is common for different span timing and length configurations of the UE.

[0161] Aspect 19: The method according to aspect 17, wherein the maximum number of spans per time slot is different for different span timing and length configurations of the UE.

[0162] Aspect 20: The method according to any one of aspects 17 to 19, wherein the maximum number of spans is based at least in part on a PDSCH or PUSCH minimum processing time capability of a cell associated with the base station communicating with the UE via the time slot.

[0163] Aspect 21: An apparatus for wireless communication at a UE, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to enable the apparatus to perform the method described in any one of aspects 1 to 13.

[0164] Aspect 22: An apparatus for wireless communication at a UE, comprising at least one device for performing the method of any one of aspects 1 to 13.

[0165] Aspect 23: A non-transitory computer-readable medium storing a code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method of any one of aspects 1 to 13.

[0166] Aspect 24: An apparatus for wireless communication at a base station, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method described in any one of aspects 14 to 16.

[0167] Aspect 25: An apparatus for performing wireless communication at a base station, comprising at least one device for performing the method of any one of aspects 14 to 16.

[0168] Aspect 26: A non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to perform the method of any one of aspects 14 to 16.

[0169] Aspect 27: An apparatus for performing wireless communication at a base station, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method described in any one of Aspects 17 to 20.

[0170] Aspect 28: An apparatus for performing wireless communication at a base station, comprising at least one device for performing the method of any one of Aspects 17 to 20.

[0171] Aspect 29: A non-transitory computer-readable medium storing a code for wireless communication at a base station, the code comprising instructions executable by a processor to perform the method of any one of aspects 17 to 20.

[0172] It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or modified, and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0173] The technology described herein can be used for various wireless communication systems, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and other systems. CDMA systems can implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA). CDMA2000 covers IS-2000, IS-95 and IS-856 standards. IS-2000 versions are commonly referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV DO, High Speed ​​Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. TDMA systems can implement radio technologies such as Global System for Mobile Communications (GSM).

[0174] OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS). LTE, LTE-A, and LTE-A Pro are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein may be used for the systems and radio technologies mentioned herein as well as other systems and radio technologies. Although aspects of LTE, LTE-A, LTE-A-Pro, or NR systems may be described for example purposes, and LTE, LTE-A, LTE-A-Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A-Pro, or NR applications.

[0175] A macro cell typically covers a relatively large geographic area (e.g., a radius of several kilometers), allowing unrestricted access by UEs by subscribing to services from a network provider. Small cells may be associated with base stations with lower power than macro cells, and small cells may operate in the same or different frequency bands (e.g., licensed, unlicensed, etc.) as macro cells. According to various examples, small cells may include pico cells, femto cells, and micro cells. For example, a pico cell may cover a small geographic area, and may allow unrestricted access by UEs by subscribing to services from a network provider. A femto cell may also cover a small geographic area (e.g., a home), and may provide restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in a home, etc.). An eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB. An eNB may support one or more (e.g., two, three, four, etc.) cells, and may also support communications using one or more component carriers.

[0176] The wireless communication systems described herein may support synchronous or asynchronous operation. For synchronous operation, the base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time. For asynchronous operation, the base stations may have different frame timing, and transmissions from different base stations may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operation.

[0177] The information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0178] The various illustrative blocks and modules described in conjunction with the present disclosure may be implemented with a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device designed to perform the functions described in the present disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a DSP core, or any other such configuration).

[0179] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Other examples and implementations are within the scope and spirit of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software, hardware, firmware, hard wiring, or any combination thereof executed by a processor. Features that implement the functions may also be physically located in different locations, including portions that are distributed in different physical locations to implement the functions.

[0180] Computer-readable media include non-transitory computer storage media and communication media, including any media that facilitate the transfer of computer programs from one place to another. Non-transitory storage media can be any available media that can be accessed by a general-purpose or special-purpose computer. As an example and not limitation, non-transitory computer-readable media may include random-access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory media that can be used to carry or store the required program code in the form of instructions or data structures, and can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. In addition, any connection is properly referred to as a computer-readable medium. For example, if the software is transmitted from a website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio and microwave are included in the definition of medium. Disks and optical discs, as used herein, include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, where disks typically reproduce data magnetically, while optical discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0181] As used herein, including in the claims, "or" as used in a list of items (e.g., a list of items preceded by phrases such as "at least one" or "one or more") indicates an inclusive list, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). In addition, as used herein, the phrase "based on" should not be interpreted as a reference to a set of closed conditions. For example, an exemplary step described as "based on condition A" can be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on".

[0182] In the drawings, similar components or features may have the same reference label. In addition, various components of the same type may be distinguished by following the reference label with a dash and a second label that is distinct from the similar component. If only the first reference label is used in this specification, the description applies to any one of the similar components having the same first reference label, regardless of the second reference label or other subsequent reference labels.

[0183] The description described herein describes example configurations in conjunction with the accompanying drawings and does not represent all examples that may be implemented or within the scope of the claims. The term "exemplary" as used herein means "used as an example, instance, or illustration," rather than "preferred" or "superior to other examples." The detailed description includes specific details to provide an understanding of the described technology. However, these technologies can be practiced without these specific details. In some cases, in order to avoid obscuring the concepts of the described examples, well-known structures and devices are shown in diagram form.

[0184] The description herein is intended to enable those skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but is consistent with the broadest scope of the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment UE, comprising: monitoring control channel elements in a control resource set based on at least one of a maximum number of downlink control channel candidates per span within a timeslot or a maximum number of non-overlapping control channel elements per span within a timeslot; identifying a discarding rule for the UE to discard control channel element monitoring opportunities or downlink control channel candidates that exceed a maximum number of non-overlapping control channel elements per span or a maximum number of downlink control channel candidates per span, respectively; applying a drop rule to fewer than all spans within a time slot; as well as determining a fixed span within the timeslot in which the UE is to apply the discard rule, wherein applying the discard rule to spans less than all spans within the timeslot comprises: For the fixed span, one or more control channel element monitoring opportunities or one or more downlink control channel candidates are discarded. The method of claim 1 , wherein the fixed span comprises a first time span within a time slot. The method of claim 1 , wherein the fixed span comprises a span for which a common search space exists.

4. The method according to claim 1, further comprising: A maximum number of spans in which the UE is to apply a drop rule is determined, wherein applying the drop rule to less than all spans within the timeslot is based at least in part on the maximum number of spans determined by the UE.

5. The method of claim 4, wherein the maximum number of spans is common for different span timing and length configurations of the UE.

6. The method of claim 4, wherein the maximum number of spans is based at least in part on UE capabilities, the method further comprising: Send UE capabilities to network devices; and Based on UE capabilities, multiple spans within a time slot that include a common search space are identified.

7. The method of claim 4, wherein the maximum number of spans is different for different span timing and length configurations of the UE.

8. The method of claim 4, wherein determining the maximum number of spans comprises: The maximum number of spans to which the UE can apply the discarding rule is determined based at least in part on a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH) minimum processing time capability of a cell with which the UE communicates through the time slot.

9. The method of claim 1 , wherein applying a drop rule to less than all spans within a time slot comprises: Only for the multiple spans where there is a common search space, one or more control channel element monitoring opportunities or one or more downlink control channel candidates are discarded.

10. The method of claim 1 , wherein applying a drop rule to less than all spans within a time slot comprises: For multiple spans where there is a common search space, and when the slot is used to communicate with a primary cell or a primary and secondary cell, one or more control channel element monitoring opportunities or one or more downlink control channel candidates are discarded.

11. The method of claim 1 , wherein applying a drop rule to less than all spans within a time slot comprises: Avoid applying drop rules across multiple spans that do not include a common search space.

12. The method of claim 1 , wherein applying a drop rule to less than all spans within a time slot comprises: Based on the fact that the time slot does not include a common search space, the application of the drop rule to any span within the time slot is avoided.

13. A method for wireless communication at a network device, comprising: identifying spans less than all spans within a time slot in which a user equipment (UE) is to apply a discard rule, wherein the discard rule indicates that for a fixed span within the time slot in which the UE is to apply the discard rule, the UE is to discard control channel element monitoring opportunities or downlink control channel candidates according to the discard rule; configuring one or more common search spaces within a span of a time slot for communicating with the UE such that at least a fixed span within the time slot includes the common search space; and Depending on the configuration, the common search space configuration is indicated to the UE. The method of claim 13 , wherein the fixed span is a first time span within a time slot.

15. The method of claim 13, wherein the common search space is the only common search space configured within a span of a time slot used for communicating with the UE.

16. A method for wireless communication at a network device, comprising: identifying a maximum number of spans per time slot in which a user equipment UE is to apply a discarding rule, wherein the discarding rule indicates that the UE is to discard control channel element monitoring opportunities or downlink control channel candidates according to the discarding rule; configuring one or more common search spaces within a span of a time slot for communicating with the UE such that the number of spans within the time slot that include the common search space is less than or equal to a maximum number of spans per time slot; and Depending on the configuration, the common search space configuration is indicated to the UE.

17. The method of claim 16, wherein the maximum number of spans per time slot is common for different span timing and length configurations of UEs.

18. The method of claim 16, wherein the maximum number of spans per time slot is different for different span timing and length configurations of the UE.

19. The method of claim 16, wherein the maximum number of spans is based at least in part on a physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH) minimum processing time capability of a cell associated with the network device communicating with the UE via the time slot.

20. An apparatus for wireless communication at a user equipment UE, comprising: means for monitoring control channel elements in a set of control resources based on at least one of a maximum number of downlink control channel candidates per span within a timeslot or a maximum number of non-overlapping control channel elements per span within a timeslot; means for identifying a discarding rule for the UE to discard control channel element monitoring opportunities or downlink control channel candidates that exceed a maximum number of non-overlapping control channel elements per span or a maximum number of downlink control channel candidates per span, respectively; means for applying the drop rule to less than all spans within the time slot; as well as Means for determining a fixed span within the timeslot in which the UE is to apply the discard rule, wherein applying the discard rule to spans less than all spans within the timeslot comprises: For the fixed span, one or more control channel element monitoring opportunities or one or more downlink control channel candidates are discarded.

21. The apparatus of claim 20, wherein the fixed span comprises a first time span within the time slot.

22. The apparatus of claim 20, wherein the fixed span comprises a span for which a common search space exists.

23. The apparatus of claim 20, further comprising: Means for determining a maximum number of spans in which the UE will apply a drop rule, wherein applying the drop rule to less than all spans within a timeslot is based at least in part on the maximum number of spans.

24. The apparatus of claim 23, wherein the maximum number of spans is common for different span timing and length configurations of the UE.

25. The apparatus of claim 23, wherein the maximum number of spans is based at least in part on UE capabilities, the apparatus further comprising: means for sending UE capabilities to a network device; and Means for identifying a plurality of spans within a time slot that include a common search space based on UE capabilities.

26. The apparatus of claim 23, wherein the maximum number of spans is different for different span timing and length configurations of the UE.

27. The apparatus of claim 23, wherein the means for determining a maximum number of spans further comprises: Means for determining a maximum number of spans to which a UE can apply a discarding rule based at least in part on a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH) minimum processing time capability of a cell communicating with the UE through a time slot.

28. The apparatus of claim 20, wherein the means for applying a drop rule to less than all spans within a time slot further comprises: Means for discarding one or more control channel element monitoring opportunities or one or more downlink control channel candidates only for a plurality of spans where a common search space exists.

29. The apparatus of claim 20, wherein the means for applying the drop rule to less than all spans within a time slot further comprises: Means for discarding one or more control channel element monitoring opportunities or one or more downlink control channel candidates for a plurality of spans where a common search space exists and when the slot is used to communicate with a primary cell or a primary and secondary cell.

30. The apparatus of claim 20, wherein the means for applying a drop rule to less than all spans within a time slot further comprises: Means for avoiding application of a drop rule in a plurality of spans that do not include a common search space.

31. The apparatus of claim 20, wherein the means for applying a drop rule to less than all spans within a time slot further comprises: Means for avoiding applying a drop rule to any span within a time slot based on the time slot not including a common search space.

32. An apparatus for wireless communication at a network device, comprising: means for identifying spans less than all spans within a time slot in which a user equipment (UE) is to apply a discard rule, wherein the discard rule indicates that for a fixed span within the time slot in which the UE is to apply the discard rule, the UE is to discard control channel element monitoring opportunities or downlink control channel candidates according to the discard rule; means for configuring one or more common search spaces within a span of a time slot for communicating with the UE such that at least a fixed span within the time slot includes a common search space; and Means for indicating a common search space configuration to a UE based on the configuration.

33. The apparatus of claim 32, wherein the fixed span is a first time span within a time slot.

34. The apparatus of claim 32, wherein the common search space is the only common search space configured within a span of a time slot used to communicate with the UE.

35. An apparatus for wireless communication at a network device, comprising: means for identifying a maximum number of spans per time slot in which a user equipment UE is to apply a discarding rule, wherein the discarding rule indicates that the UE is to discard control channel element monitoring opportunities or downlink control channel candidates according to the discarding rule; means for configuring one or more common search spaces within a span of time slots used for communicating with the UE such that the number of spans within the time slots that include the common search spaces is less than or equal to the maximum number of spans per time slot; and Means for indicating a common search space configuration to a UE based on the configuration.

36. The apparatus of claim 35, wherein the maximum number of spans is common for different span timing and length configurations of the UE.

37. The apparatus of claim 35, wherein the maximum number of spans is different for different span timing and length configurations of the UE.

38. The apparatus of claim 35, wherein: The maximum number of spans is based at least in part on a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH) minimum processing time capability of a cell associated with the network device communicating with the UE via the time slot.

39. An apparatus for wireless communication at a user equipment (UE), comprising: processor, a memory coupled to the processor; and Instructions, stored in the memory and executable by the processor, cause the device to: monitoring control channel elements in a control resource set based on at least one of a maximum number of downlink control channel candidates per span within a timeslot or a maximum number of non-overlapping control channel elements per span within a timeslot; identifying a discarding rule for the UE to discard control channel element monitoring opportunities or downlink control channel candidates that exceed a maximum number of non-overlapping control channel elements per span or a maximum number of downlink control channel candidates per span, respectively; applying a drop rule to fewer than all spans within a time slot; as well as determining a fixed span within the timeslot in which the UE is to apply the discard rule, wherein applying the discard rule to spans less than all spans within the timeslot comprises: For the fixed span, one or more control channel element monitoring opportunities or one or more downlink control channel candidates are discarded.

40. An apparatus for wireless communication at a network device, comprising: processor, a memory coupled to the processor; and Instructions, stored in the memory and executable by the processor, cause the device to: identifying spans less than all spans within a time slot in which a user equipment (UE) is to apply a discard rule, wherein the discard rule indicates that for a fixed span within the time slot in which the UE is to apply the discard rule, the UE is to discard control channel element monitoring opportunities or downlink control channel candidates according to the discard rule; configuring one or more common search spaces within a span of a time slot for communicating with the UE such that at least a fixed span within the time slot includes the common search space; and Depending on the configuration, the common search space configuration is indicated to the UE.

41. An apparatus for wireless communication at a network device, comprising: processor, a memory coupled to the processor; and Instructions, stored in the memory and executable by the processor, cause the device to: identifying a maximum number of spans per time slot in which a user equipment UE is to apply a discarding rule, wherein the discarding rule indicates that the UE is to discard control channel element monitoring opportunities or downlink control channel candidates according to the discarding rule; configuring one or more common search spaces within a span of a time slot for communicating with the UE such that the number of spans within the time slot that include the common search space is less than or equal to a maximum number of spans per time slot; and Depending on the configuration, the common search space configuration is indicated to the UE.

42. A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by a processor to: monitoring control channel elements in a control resource set based on at least one of a maximum number of downlink control channel candidates per span within a timeslot or a maximum number of non-overlapping control channel elements per span within a timeslot; identifying a discarding rule for the UE to discard control channel element monitoring opportunities or downlink control channel candidates that exceed a maximum number of non-overlapping control channel elements per span or a maximum number of downlink control channel candidates per span, respectively; applying a drop rule to fewer than all spans within a time slot; as well as determining a fixed span within the timeslot in which the UE is to apply the discard rule, wherein applying the discard rule to spans less than all spans within the timeslot comprises: For the fixed span, one or more control channel element monitoring opportunities or one or more downlink control channel candidates are discarded.

43. A non-transitory computer readable medium storing code for wireless communication at a network device, the code comprising instructions executable by a processor to: identifying spans less than all spans within a time slot in which a user equipment (UE) is to apply a discard rule, wherein the discard rule indicates that for a fixed span within the time slot in which the UE is to apply the discard rule, the UE is to discard control channel element monitoring opportunities or downlink control channel candidates according to the discard rule; configuring one or more common search spaces within a span of a time slot for communicating with the UE such that at least a fixed span within the time slot includes the common search space; and Depending on the configuration, the common search space configuration is indicated to the UE.

44. A non-transitory computer readable medium storing code for wireless communication at a network device, the code comprising instructions executable by a processor to: identifying a maximum number of spans per time slot in which a user equipment UE is to apply a discarding rule, wherein the discarding rule indicates that the UE is to discard control channel element monitoring opportunities or downlink control channel candidates according to the discarding rule; configuring one or more common search spaces within a span of a time slot for communicating with the UE such that the number of spans within the time slot that include the common search space is less than or equal to the maximum number of spans per time slot; and Depending on the configuration, the common search space configuration is indicated to the UE.

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