Low Complexity Physical Downlink Control Channel

Abstract

Certain aspects of the present disclosure provide techniques for low complexity physical downlink channels. A method that may be performed by a user equipment (UE) includes: determining one or more policies for monitoring one or more physical downlink control channels (PDCCHs) within one or more bandwidth parts (BWPs) for a first type of UE, wherein the one or more policies for the first type of UE are different from a set of policies for a second type of UE; and monitoring signals from a network entity via the one or more PDCCHs according to the determined policies.

Description

Technical Field

[0001] Aspects of the present disclosure relate to wireless communications and, more particularly, to techniques for a low-complexity physical downlink control channel monitoring strategy, which may be desirable for reduced capability or low-complexity user equipment. Background Art

[0002] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcast. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems include 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SCFDMA) systems, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, to name a few.

[0003] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at municipal, national, regional, and even global levels. New radio (e.g., 5G NR) is an example of an emerging telecommunication standard. NR is a set of enhancements to the LTE mobile standard released by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards using OFDMA with cyclic prefix (CP) on the downlink (DL) and uplink (UL). To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0004] However, as demand for mobile broadband access continues to increase, further improvements to NR and LTE technologies are needed. Preferably, these improvements should also apply to other multiple access technologies and the telecommunication standards that employ them. Summary of the Invention

[0005] The systems, methods, and devices of the present disclosure each have several aspects, no single aspect of which is solely responsible for its desirable attributes. Without limiting the scope of the present disclosure as expressed by the appended claims, some features will now be briefly discussed. After considering this discussion, and especially after reading the section entitled "Detailed Description," it will be understood how the features of the present disclosure provide advantages, including PDCCH monitoring strategies, which are desirable for reduced complexity UEs or low complexity UEs.

[0006] Certain aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication by a user equipment (UE). The method generally includes determining one or more policies for monitoring one or more physical downlink control channels (PDCCHs) within one or more bandwidth parts (BWPs) for a first type of UE, wherein the one or more policies for the first type of UE are different from a set of policies for a second type of UE; and monitoring signals from a network entity via the one or more PDCCHs according to the determined policies.

[0007] Certain aspects of the subject matter described in this disclosure can be implemented in a method for wireless communications by a network entity. The method generally includes determining one or more policies for transmitting signals via one or more physical downlink control channels (PDCCHs) within one or more bandwidth parts (BWPs) for a first type of user equipment (UE), wherein the one or more policies for the first type of UE are different from a set of policies for a second type of UE; and transmitting signals to the UE via the one or more PDCCHs according to the determined policies.

[0008] Aspects of the present disclosure provide means for performing the methods described herein, including apparatus, processors, and computer-readable media.

[0009] To accomplish the foregoing and related ends, one or more aspects include the features hereinafter fully described and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of one or more aspects. However, these features are indicative of but some of the various ways in which the principles of the various aspects may be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order that the above-mentioned features of the present disclosure may be understood in detail, reference may be made to various aspects for a more particular description briefly summarized above, some of which are illustrated in the accompanying drawings. It should be noted, however, that the drawings illustrate only certain typical aspects of the disclosure and are not to be considered limiting of its scope, as the description may admit to other equally effective aspects.

[0011] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with certain aspects of the present disclosure.

[0012] Figure 2 is a block diagram conceptually illustrating designs of an exemplary base station (BS) and user equipment (UE), in accordance with certain aspects of the present disclosure.

[0013] Figure 3 is an example frame format for certain wireless communication systems (e.g., New Radio (NR)) in accordance with certain aspects of the present disclosure.

[0014] Figure 4 is an example of a control region for certain wireless communication systems (e.g., NR) according to certain aspects of the present disclosure.

[0015] Figure 5 Illustrated is a signaling flow for low complexity physical downlink control channel (PDCCH) monitoring, in accordance with certain aspects of the present disclosure.

[0016] Figure 6 Illustrated are examples of partially overlapping PDCCH monitoring opportunities in a time slot, in accordance with certain aspects of the present disclosure.

[0017] Figure 7A A table depicting exemplary blind decoding (BD) limits (ie, maximum values) in slots for certain subcarrier spacings (SCSs) in accordance with certain aspects of the present disclosure.

[0018] Figure 7B A table depicting another example of BD restrictions in time slots for certain SCSs according to certain aspects of the present disclosure.

[0019] Figure 8 is a flow chart illustrating example operations for wireless communications by a UE, in accordance with certain aspects of the present disclosure.

[0020] Figure 9 is a flow diagram illustrating example operations for wireless communications by a network entity (eg, a BS), in accordance with certain aspects of the present disclosure.

[0021] Figure 10 Illustrated is a communication device (eg, a UE or BS) that may include various components configured to perform operations for the techniques disclosed herein according to aspects of the present disclosure.

[0022] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized on other aspects without specific recitation. DETAILED DESCRIPTION

[0023] Aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for low-complexity physical downlink control channel (PDCCH) monitoring. In some cases, various strategies may include performing fewer blind decodings, monitoring fewer control channel elements (CCEs), monitoring fewer control resource sets (CORESETs), monitoring fewer search space sets, higher layers for aggregation levels (ALs), and / or low-complexity quasi-cooperative (QCL) configurations. The various strategies described herein for PDCCH monitoring can enable UEs to reduce their form factor, processing complexity, transceiver complexity, and / or power consumption.

[0024] The following description provides an example of PDCCH monitoring in a communication system and does not limit the scope, applicability or examples set forth in the claims. Without departing from the scope of this disclosure, the functions and arrangements of the elements discussed may be changed. Various examples may appropriately omit, replace or add various processes or components. For example, the methods described may be performed in an order different from the order described, and various steps may be added, omitted or combined. In addition, the features described with respect to some examples may be combined in some other examples. For example, a device or method may be implemented using any number of aspects set forth herein. In addition, the scope of this disclosure is intended to cover such devices or methods that are practiced using other structures, functionalities or structures and functionalities that are supplementary to or in addition to the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be implemented by one or more elements of the claims. The word "exemplary" is used herein to mean "used as an example, instance, or illustration." Any aspect described herein as "exemplary" is not necessarily to be interpreted as preferred or advantageous over other aspects.

[0025] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific radio access technology (RAT) and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, air interface, etc. A frequency may also be referred to as a carrier, subcarrier, frequency channel, tone, subband, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs.

[0026] The techniques described herein can be used for various wireless networks and radio technologies. Although terms generally associated with 3G, 4G, and / or new radio (e.g., 5G NR) wireless technologies are used herein to describe various aspects, various aspects of the present disclosure can be applied to other generation-based communication systems.

[0027] NR access can support various wireless communication services, such as enhanced mobile broadband (eMMB) targeting wide bandwidth (e.g., 80 MHz or higher), millimeter wave (mmW) targeting high carrier frequencies (e.g., 24 GHz to 53 GHz or higher), massive machine type communication (MTC) targeting non-backward compatible MTC technology, and / or mission-critical communication targeting ultra-reliable low latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTIs) to meet corresponding quality of service (QoS) requirements. In addition, these services can coexist in the same subframe. NR supports beamforming and the beam direction can be dynamically configured. MIMO transmission with precoding can also be supported. MIMO configuration in DL can support up to 8 transmit antennas (with up to 8 streams and multi-layer DL transmission of up to 2 streams per UE). Multi-layer transmission of up to 2 streams per UE can be supported. Aggregation of multiple cells can be supported using up to 8 serving cells.

[0028] Figure 1 An exemplary wireless communication network 100 is illustrated in which various aspects of the present disclosure may be performed. For example, the wireless communication network 100 may be an NR system (e.g., a 5G NR network).

[0029] like Figure 1 As shown, according to aspects of the present disclosure, BS 110a includes a PDCCH manager 112 that applies various strategies for PDCCH monitoring for reduced capability UEs. According to aspects of the present disclosure, UE 120a, which is a reduced capability UE, includes a PDCCH manager 122 that applies various strategies for monitoring PDCCHs.

[0030] like Figure 1 As shown, the wireless communication network 100 may include a plurality of BSs 110a-z (each BS also individually referred to herein as BS 110 or collectively referred to herein as BS 110) and other network entities. BS 110 may provide communication coverage for a particular geographic area, sometimes referred to as a "cell," which may be stationary or may move depending on the location of the mobile BS 110. In some examples, BSs 110 may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless communication network 100 via various types of backhaul interfaces (e.g., direct physical connections, wireless connections, virtual networks, etc.) using any suitable transport network. Figure 1In the example shown, BSs 110a, 110b, and 110c may be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x may be a pico BS for pico cell 102x. BSs 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. A BS may support one or more cells.

[0031] BS 110 communicates with UEs 120a-y (each UE is also referred to herein individually as UE 120 or collectively as UEs 120) in wireless communication network 100. UEs 120 (e.g., 120x, 120y, etc.) may be dispersed throughout wireless communication network 100, and each UE 120 may be stationary or mobile. Wireless communication network 100 may also include relay stations (e.g., relay station 110r), also known as relays, etc., which receive data and / or other information from upstream stations (e.g., BS 110a or UE 120r) and transmit data and / or other information to downstream stations (e.g., UE 120 or BS 110), or relay transmissions between UEs 120 to facilitate communication between devices.

[0032] The network controller 130 may communicate with a set of BSs 110 and provide coordination and control (e.g., via a backhaul) for these BSs 110. In various aspects, the network controller 130 may communicate with a core network 132 (e.g., a 5G core network (5GC)), which provides various network functions such as access and mobility management, session management, user plane functions, policy control functions, authentication server functions, unified data management, application functions, network exposure functions, network repository functions, network slice selection functions, etc.

[0033] Figure 2 BS 110a and UE 120a (eg, Figure 1 1 and 2. Example components of a wireless communication network 100) that may be used to implement aspects of the present disclosure.

[0034] At BS 110a, transmit processor 220 may receive data from data source 212 and control information from controller / processor 240. Control information may be used for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC PDCCH), etc. Data may be used for a physical downlink shared channel (PDSCH), etc. A medium access control (MAC)-control element (MAC-CE) is a MAC layer communication structure that may be used for the exchange of control commands between wireless nodes. A MAC-CE may be carried in a shared channel, such as a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), or a physical sidelink shared channel (PSSCH).

[0035] The processor 220 may process (e.g., encode and symbol map) data and control information to obtain data symbols and control symbols, respectively. The transmit processor 220 may also generate reference symbols, such as for the primary synchronization signal (PSS), secondary synchronization signal (SSS), PBCH demodulation reference signal (DMRS), and channel state information reference signal (CSI-RS). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​the data symbols, control symbols, and / or reference symbols, if applicable, and may provide output symbol streams to modulators (MODs) 232a-232t. Each modulator 232 may process a corresponding output symbol stream (e.g., OFDM, etc.) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The downlink signals from modulators 232a-232t may be transmitted via antennas 234a-234t, respectively.

[0036] At UE 120a, antennas 252a-252r may receive downlink signals from BS 110a and may provide the received signals to demodulators (DEMODs) in transceivers 254a-254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the corresponding received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a-254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120a to a data sink 260, and provide decoded control information to a controller / processor 280.

[0037] On the uplink, at UE 120a, a transmit processor 264 may receive and process data from a data source 262 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 280 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 264 may also generate reference symbols for reference signals (e.g., for a sounding reference signal (SRS)). The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 (if applicable), further processed by modulators in transceivers 254a-254r (e.g., for SC-FDM, etc.), and transmitted to BS 110a. At BS 110a, the uplink signal from UE 120a may be received by antenna 234, processed by modulator 232, detected by MIMO detector 236 (if applicable), and further processed by receive processor 238 to obtain decoded data and control information sent by UE 120a. The receive processor 238 may provide decoded data to a data sink 239 and decoded control information to a controller / processor 240 .

[0038] Memories 242 and 282 may store data and program codes for BS 110a and UE 120a, respectively. A scheduler 244 may schedule UEs for data transmission on the downlink and / or uplink.

[0039] The various techniques and methods described herein may be performed using antennas 252, processors 266, 258, 264, and / or controller / processor 280 of UE 120a and / or antennas 234, processors 220, 230, 238, and / or controller / processor 240 of BS 110a. Figure 2As shown, the controller / processor 240 of BS 110a has a PDCCH manager 241 that applies various strategies for PDCCH monitoring for reduced capability UEs according to aspects described herein. Figure 2 As shown, controller / processor 280 of UE 120a has a PDCCH manager 281 that applies various strategies for PDCCH monitoring according to aspects described herein. Although shown at the controller / processor, other components of UE 120a and BS 110a may be used to perform the operations described herein.

[0040] NR can utilize orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) on both the uplink and downlink. NR can support half-duplex operation using time division duplexing (TDD). OFDM and single-carrier frequency division multiplexing (SC-FDM) divide the system bandwidth into multiple orthogonal subcarriers, which are also commonly referred to as tones, bins, etc. Each subcarrier can be modulated with data. Modulation symbols can be sent in the frequency domain with OFDM and in the time domain with SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers can depend on the system bandwidth. The minimum resource allocation, called a resource block (RB), can be 12 consecutive subcarriers. The system bandwidth can also be partitioned into subbands. For example, a subband can cover multiple RBs. NR can support a basic subcarrier spacing (SCS) of 15 kHz, and other SCSs (e.g., 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc.) can be defined relative to the basic SCS.

[0041] Figure 3 3 is a diagram showing an example of a frame format 300 for NR. The transmission timeline of each of the downlink and uplink can be divided into units of radio frames. Each radio frame can have a predetermined duration (e.g., 10 ms) and can be divided into 10 subframes, each subframe having 1 ms, indexed from 0 to 9. Each subframe can include a variable number of time slots (e.g., 1, 2, 4, 8, 16, ... time slots) depending on the SCS. Each time slot can include a variable number of codeword periods (e.g., 7, 12, or 14 codewords) depending on the SCS. The codeword periods in each time slot can be assigned an index. A micro-slot, which can be referred to as a sub-slot structure, refers to a transmission time interval with a duration less than a time slot (e.g., 2, 3, or 4 codewords). Each codeword in a time slot can indicate the link direction (e.g., DL, UL, or flexible) used for data transmission, and the link direction of each subframe can be dynamically switched. The link direction can be based on the time slot format. Each time slot can include DL / UL data and DL / UL control information.

[0042] In NR, synchronization signal blocks (SSBs) are transmitted. In certain aspects, SSBs may be transmitted in bursts, where each SSB in the burst corresponds to a different beam direction for UE-side beam management (e.g., including beam selection and / or beam refinement). The SSBs include PSS, SSS, and a two-symbol PBCH. SS blocks may be transmitted in fixed slot positions, such as Figure 3 Symbols 0-3 are shown. PSS and SSS can be used by UE for cell search and acquisition. PSS can provide half-frame timing, and SS can provide CP length and frame timing. PSS and SSS can provide cell identification. PBCH carries some basic system information, such as downlink system bandwidth, timing information within a radio frame, SS burst set period, system frame number, etc. SSBS can be organized into SS bursts to support beam scanning. Additional system information, such as remaining minimum system information (RMSI), system information block (SIB), and other system information (OSI) can be sent on the physical downlink shared channel (PDSCH) in certain subframes. SSB can be sent up to sixty-four times, for example, using up to sixty-four different beam directions for mmWave. Multiple transmissions of SSB are called SS burst sets. SSBs in an SS burst set can be sent in the same frequency region, while SSBs in different SS burst sets can be sent in different frequency regions.

[0043] Figure 44 is a diagram illustrating an example of a control resource set (CORESET) within a carrier bandwidth on a time slot in NR. As shown, a carrier bandwidth (CBW) 402 can have multiple bandwidth parts (BWPs) 404, 406 at respective subcarrier spacings (SCSs). In this example, BWP 404 is configured with a single CORESET 408, and BWP 406 is configured with CORESETs 410, 412. In various aspects, a BWP can be configured with multiple CORESETs. Each of CORESETs 408, 410, 412 comprises a set of physical resources within a specific region of a downlink resource grid and is used, for example, to carry downlink control information (DCI). Within a CORESET, the set of resource blocks (RBs) and the number of consecutive OFDM symbols in which the CORESET is located can be configured using a CORESET configuration, and the time-domain location of the OFDM symbols can be configured using a corresponding set of (multiple) PDCCH search spaces (SSs). The search space set can be configured with the type of SS set (e.g., a common search space (CSS) set or a UE-specific search space (USS) set), the DCI format to be monitored, the monitoring timing, and the number of PDCCH candidates for each aggregation level (AL) in the SS set. In other words, a search space set is a set of one or more search spaces, where each search space corresponds to an AL (e.g., the number of control channel elements for PDCCH candidates). The configuration flexibility of the control region (i.e., CORESET and associated search space set) including time, frequency, parameter set, and operating point enables NR to address various use cases for control signaling (e.g., various expected delays and / or various channel conditions). In some wireless communication systems (e.g., LTE), PDCCH is allocated across the entire system bandwidth, while NR PDCCH is transmitted in the CORESET of the active BWP (e.g., CORESET 410, 412 of BWP 406).

[0044] Example Low Complexity PDCCH

[0045] Certain wireless communication systems (e.g., 5G NR systems) provide services with relatively high data rates and low latency (such as eMBB and / or URLLC), which may result in a larger UE form factor, higher UE hardware cost, higher UE complexity (e.g., memory, processor and / or transceiver circuitry), and / or higher UE power consumption. 5G NR systems also provide very flexible PDCCH monitoring configurations, such as fully configurable time resources, frequency resources, and cycle patterns for PDCCH monitoring, as described in this document. Figure 4As described above, under the flexible PDCCH monitoring regime, the 5G NR system provides a relatively large number of potential PDCCH decodings using multiple CORESETs and SS sets (in the form of transmission configuration indicator (TCI) states) and flexible quasi-coordinated (QCL) configurations for tracking channel changes. As such, the UE's PDCCH monitoring configuration plays a role in determining the UE's complexity, such as form factor, hardware cost, circuit complexity, and / or power consumption.

[0046] The 5G NR system can also provide services for UEs with reduced capabilities. In some cases, the UE with reduced capabilities may have reduced processing capabilities (e.g., reduced memory or processing time) and / or a less complex transceiver (e.g., fewer transmit and / or receive paths). As a result, the UE with reduced capabilities may have a smaller form factor, lower hardware cost, lower circuit complexity, and / or lower power consumption compared to UEs that support higher data rates and / or lower latency. As an example, the UE with reduced capabilities may be a wearable wireless communication device (such as a smart watch or activity tracker), a video surveillance device, or an Industrial Internet of Things (IIoT) device.

[0047] Aspects of the present disclosure provide various strategies for low-complexity PDCCH monitoring for UEs with reduced capabilities. In some cases, the various strategies may include performing fewer blind decodings, processing fewer control channel elements (CCEs), monitoring fewer CORESETs, monitoring fewer search space sets, higher layers of aggregation levels (ALs), and / or low-complexity QCL configurations (i.e., active TCI states). The various strategies described herein may enable UEs to reduce their form factor, processing complexity, transceiver complexity, and / or power consumption. In other words, the various strategies described herein may provide desired power consumption and processing timelines for UEs with reduced capabilities.

[0048] Figure 5The diagram illustrates a signaling flow for low-complexity PDCCH monitoring according to certain aspects of the present disclosure. As shown, at 502, UE 120 may signal to BS 110 an indication that the UE is a reduced-capability UE. In some cases, the indication of reduced capability may be sent via radio resource control (RRC) signaling (e.g., RRC capability information) or RACH signaling (e.g., a specific preamble sequence associated with the reduced-capability UE). At 504, BS 110 may determine one or more policies for configuring UE 120 for PDCCH monitoring and sending and receiving signals on the BWP via a CORESET, as further described herein. In various aspects, the policies for reduced-capability UEs differ from the policy set for another type of UE (such as a UE supporting eMBB or URLLC). In various aspects, the policies for reduced-capability UEs may be pre-programmed at BS 110. In some cases, at 502, at least some of the policies may be included in the indication. That is, the indication at 502 may also include an indication of the PDCCH monitoring capability of UE 120. At 506, BS 110 may send one or more CORESET configurations to UE 120 based on the policy determined at 504. For example, BS 110 may configure UE 120 with a single CORESET in a BWP, where the CORESET has a single CSS set and a single USS set. At 508, UE 120 may determine a policy for monitoring the PDCCH within the BWP, as further described herein. At 510, UE 120 may monitor the PDCCH sent from BS 110 based on the determined policy. For example, the policy may specify that UE 120 has a lower upper limit for performing BD for a particular SCS within a particular time-domain resource unit (e.g., a time slot) than under a policy set for another type of UE, such as a UE supporting eMBB or URLLC. UE 120 may perform BD within the time-domain resource unit at the SCS based on the lower maximum value. In some cases, at 510, UE 120 may receive a downlink or uplink schedule via the PDCCH, and at 512, UE 120 may send an uplink signal or receive a downlink signal according to the schedule.

[0049] In certain aspects, the PDCCH monitoring strategy for reduced-capability UEs may include various CORESET strategies. In 5G NR systems, a UE supports up to three CORESETs in a BWP and up to ten SS sets in a BWP. For reduced-capability UEs, the CORESET strategy may specify that the UE supports up to a single CORESET per BWP, a single CSS set per BWP, and a single USS set per BWP.

[0050] In various aspects, the CORESET policy may provide how certain SS sets may overlap in the time domain. For example, in a 5G NR system, a UE is not expected to be configured with partially overlapping SS set opportunities in the time domain from the same or different SS sets associated with the same CORESET (SS set opportunities are also called PDCCH monitoring opportunities (PMOs), which are similar to the control region used for LTE). The rationale is that there is no spatial multiplexing gain or interference randomization effect for SS set opportunities in the same CORESET. Figure 6 An example of partially overlapping PMOs in a time slot according to certain aspects of the present disclosure is illustrated. As shown, PMO1 partially overlaps with PMO2 on an OFDM symbol, which may allow different CORESETs in some cases, but not the same CORESET.

[0051] For reduced capability UEs, CORESET policies may apply additional or alternative rules for how certain SS sets overlap in the time domain. In some cases, SS set opportunities from the same or different SS sets associated with the same CORESET may not be allowed to completely overlap in the time domain. In some cases, there may be no overlap (partial or complete) in the time domain between SS set opportunities from different CORESETs. In some cases, complete overlap in the time domain is allowed between SS set opportunities from different CORESETs only if the different CORESETs have the same frequency domain RB allocation and time domain OFDM symbol duration. These CORESET policies may be applied in various combinations. In other words, CORESET policies may not be mutually exclusive of each other.

[0052] In certain aspects, the PDCCH monitoring policy for reduced capability UEs may include various BD policies that set a maximum number of BDs that the UE is expected to perform in a time domain resource unit (e.g., time slot) per SCS. In various aspects, the BD policy may set a lower maximum number of BDs for a particular SCS than the policy set for the second type of UEs. In some cases, a particular SCS may provide a base or root maximum number of BDs, and other SCSs may reduce the base maximum by a factor (such as 2) depending on the SCS. x As an example, Figure 7A A table depicting BD limits (i.e., maximum values) in time slots for certain SCSs according to certain aspects of the present disclosure is shown. In this example, a 15kHz BD limit provides a base BD limit, and a 30kHz SCS BD limit reduces the base BD by half (2 1 ), the BD limit of 60kHz SCS reduces the basic BD by a factor of 4 (2 2), and the BD limit of 120kHz SCS reduces this basic BD by a factor of 8 (2 3 ). Figure 7A The table depicted in FIG also shows the obtained reduction ratio (ratio of BD) compared with the BD limit of other types of UEs. Since the power consumption can be proportional to the reduction ratio, Figure 7A It is shown that BD limits set for certain SCSs provide a reduction in power consumption, which can provide desirable hardware cost and power consumption for reduced capability UEs.

[0053] In some cases, the maximum number of BDs per SCS in a time slot may include a maximum number of separate BDs reserved for a CSS set and a maximum number of separate BDs reserved for a USS set, wherein the BD limit for the USS set is reduced for certain SCSs and the BD limit for the CSS set remains constant. In other words, the maximum number of BDs for a USS set for a particular SCS provides a basic maximum number of BDs, and other SCSs may reduce the basic maximum by a factor (such as 2) depending on the SCS. x As an example, Figure 7B A table showing BD limits (i.e., maximum values) in time slots for certain SCSs according to certain aspects of the present disclosure is shown. In this example, when the BD limit for the CSS set is kept constant at 12, the 15kHz BD limit provides a base BD limit, and the 30kHz SCS BD limit reduces this base BD by half (2 1 ), the BD limit of 60kHz SCS reduces the basic BD by a factor of 4 (2 2 ), and the BD limit of 120kHz SCS reduces this basic BD by a factor of 8 (2 3 ). Figure 7B The table depicted in FIG also shows the obtained reduction ratio (ratio of BD) compared with the BD limit of other types of UEs. Since the power consumption can be proportional to the reduction ratio, Figure 7B It is shown that setting BD limits for certain SCSs provides a reduction in power consumption, which can provide a desired hardware cost and power consumption for reduced-capability UEs. In some aspects, the maximum number of BDs for a USS set can remain constant, while the maximum number of BDs for a CSS set can be reduced for certain SCSs.

[0054] Although Figure 7A and Figure 7B The examples depicted in provide certain BD limits for certain SCSs for ease of understanding, but aspects of the present disclosure may also be applied to different values ​​of the basic maximum, different SCSs that provide the basic maximum, and / or other SCSs (e.g., a 120kHz SCS).

[0055] In certain aspects, the PDCCH monitoring strategy for reduced capability UEs may include various CCE strategies. For example, a strategy similar to the BD strategy described herein may also be applied to the CCE restriction per slot.

[0056] In certain aspects, the PDCCH monitoring strategy for UEs with reduced capabilities may include various aggregation level strategies. The aggregation level (AL) determines the amount of time and frequency resources used for PDCCH transmission. For example, the number of control channel elements (CCE) allocated to PDCCH transmission is equal to the AL. For UEs with reduced capabilities, due to the reduction in the number of receive (Rx) antennas, the UE may not be able to detect PDCCHs with relatively small ALs because the received power of the PDCCH is reduced compared to other types of UEs with more Rx antennas. In certain aspects, UEs with reduced capabilities may have a higher floor for AL. That is, if the AL for a PDCCH candidate is less than a threshold, the UE may not process these PDCCH candidates in the search space set. UEs with reduced capabilities may ignore PDCCH candidates configured with a small AL (e.g., AL≤2). For example, if a CSS set is configured for both UEs with reduced capabilities and other types of UEs, PDCCH candidates with a small AL may only be used for UEs of other types.

[0057] In certain aspects, the PDCCH monitoring strategy for a reduced capability UE may include various TCI state (i.e., QCL) strategies. The transmission configuration indicator (TCI) state indicates the QCL relationship between reference signals (e.g., between DMRS and SSB or between DMRS and CSI-RS) with respect to certain common channel properties (delay, Doppler, and spatial). In a 5G NR system, a UE supports one more active TCI state for PDCCH than PDSCH. Therefore, a UE can have a minimum of two active TCI states for PDCCH. As the number of active TCI states configured for a UE increases, the number of time, frequency, or spatial tracking cycles to be maintained also increases, which may exceed the capabilities of the reduced capability UE or be undesirable for the reduced capability UE.

[0058] For a reduced capability UE, the UE may support a number of active TCI states for the PDCCH in the active BWP independently of the number of active TCI states for the PDSCH. For example, the UE may support the same number of active TCI states for the PDCCH as for the PDSCH, or a fewer number. Additionally or alternatively, a minimum number of supported active TCI states for the PDCCH in the active BWP may be set for the reduced capability UE. As an example, the reduced capability UE may be configured with a single active TCI state for the PDCCH in the active BWP based on the minimum value.

[0059] Figure 8 8 is a flow diagram illustrating example operations 800 for wireless communication according to certain aspects of the present disclosure. Operations 800 may be performed, for example, by a UE (e.g., UE 120a in wireless communication network 100). Operations 800 may be implemented as a process on one or more processors (e.g., Figure 2 In addition, the system can be connected to the network via one or more antennas (e.g., Figure 2 The UE may transmit and receive signals in operation 800 using antenna 252. In some aspects, the UE may transmit and / or receive signals via a bus interface of one or more processors (e.g., controller / processor 280) that obtain and / or output signals.

[0060] Operations 800 may begin at 802, where a UE determines one or more policies for monitoring one or more PDCCHs within one or more BWPs for a first type of UE (e.g., a reduced capability UE or a low complexity UE). In various aspects, the one or more policies for the first type of UE differ from a set of policies for a second type of UE (e.g., a UE supporting eMBB or URLLC). At 804, the UE may monitor signals from a network entity (e.g., BS 110) via the one or more PDCCHs in accordance with the determined policies.

[0061] Figure 9 800 is a flow diagram illustrating example operations 900 for wireless communication according to certain aspects of the present disclosure. Operations 900 may be performed, for example, by a network entity (e.g., BS 110a in wireless communication network 100). Operations 900 may be complementary to operations 800 performed by a UE. Operations 900 may be implemented as a process on one or more processors (e.g., Figure 2 In addition, the system may be configured to receive signals from one or more antennas (e.g., Figure 2 The BS may transmit and receive signals in operation 900 using antenna 234. In some aspects, the BS may transmit and / or receive signals via a bus interface of one or more processors (e.g., controller / processor 240) that obtain and / or output signals.

[0062] Operations 900 may begin at 902, where a network entity may determine one or more policies for transmitting signals via one or more PDCCHs within one or more BWPs for a first type of UE (e.g., a reduced capability UE or a low complexity UE). In various aspects, the one or more policies for the first type of UE differ from a set of policies for a second type of UE. At 904, the network entity may transmit signals to the UE via the one or more PDCCHs in accordance with the determined policies.

[0063] In some cases, the UE may monitor only the CORESET in the active BWP. That is, although the UE may be configured with CORESETs in multiple BWPs, the UE may monitor only the control region of the active BWP. For example, at 804, the UE may monitor the PDCCH in the control region (e.g., the CORESET) in the active BWP. At 804, the UE may monitor and / or receive multiple PDCCHs carrying various types of downlink control information (DCI).

[0064] In various aspects, the one or more policies include at least one of a blind decoding (BD) policy, a control channel element (CCE) policy, a control resource set (CORESET) policy, an aggregation level (AL) policy, or a transmission configuration indicator (TCI) state policy. In certain aspects, the BD policy includes a lower maximum number of BDs for a subcarrier spacing (SCS) in a time-domain resource unit than a policy set for a second type of UE. As used herein, the maximum number of BDs refers to the maximum number of BDs used to decode PDCCH candidates that a UE can process within a particular time-domain resource unit (e.g., a time slot).

[0065] In some cases, BD strategies can be used as referenced in this article. Figure 7A For example, the BD policy may include a maximum number of BDs in a time-domain resource unit (e.g., time slot) per SCS, wherein the maximum number of BDs for a particular SCS (e.g., 15 kHz) provides a basic maximum number of BDs, and the maximum number of BDs for other SCSs is reduced by a factor associated with the other SCSs (e.g., 2 x ) to determine the maximum number of BDs for another SCS.

[0066] In some cases, BD strategies can be used as referenced in this article. Figure 7BThe BD limit is set as described. For example, the maximum number of BDs per SCS may include a first maximum number of BDs for one or more common search spaces and a second maximum number of BDs for one or more UE-specific search spaces, wherein the second maximum number of BDs for a particular SCS (e.g., 15 kHz) provides a basic maximum number of BDs, and the second maximum number of BDs for another SCS is determined by reducing the basic maximum number of BDs by a factor associated with the other SCS. In some aspects, the first maximum number of other SCSs can be reduced while the second number remains unchanged.

[0067] In various aspects, the CCE policy may include monitoring fewer CCEs for the SCS in a time domain resource unit (e.g., time slot) than under a policy set for a second type of UE. As used herein, the maximum number of CCEs refers to the maximum number of CCEs that a UE can monitor / process within a particular time domain resource unit (e.g., time slot). In some cases, the CCE policy may be in accordance with the CCE policy set herein. Figure 7A For example, the CCE policy may include a maximum number of CCEs in a time-domain resource unit (e.g., time slot) per SCS, where the maximum number of CCEs for a particular SCS (e.g., 15 kHz) provides a basic maximum number of CCEs, and the maximum number of CCEs for a particular SCS (e.g., 15 kHz) is reduced by a factor associated with other SCSs (e.g., 2 x ) to determine the maximum number of CCEs for another SCS.

[0068] In some cases, CCE policies can be used in conjunction with the Figure 7B For example, the maximum number of CCEs per SCS may include a first maximum number of CCEs for one or more common search spaces and a second maximum number of CCEs for one or more UE-specific search spaces, wherein the second maximum number of CCEs for a particular SCS (e.g., 15 kHz) provides a basic maximum number of CCEs, and the second maximum number of CCEs for a particular SCS (e.g., 15 kHz) is reduced by a factor associated with other SCSs (e.g., 2 x ) to determine the second maximum number of CCEs for another SCS.

[0069] In various aspects, the CORESET policy includes monitoring fewer CORESETs or search space sets per BWP than under the policy set for the second type of UE. In some cases, the CORESET policy includes monitoring a maximum of a single CORESET per BWP, a single CSS set per BWP, and a single USS set per BWP. In various aspects, the CORESET policy may include not allowing search space set opportunities to completely overlap in the time domain with another search space set opportunity from the same search space set or from a different search space set within the same CORESET. In other words, a reduced capability UE may not expect a search space set opportunity to completely overlap in the time domain with another search space set opportunity from the same search space set or from a different search space set within the same CORESET. In certain aspects, the CORESET policy may include not allowing search space set opportunities within a first CORESET to completely or partially overlap in the time domain with another search space set opportunity within a second CORESET. In other words, a reduced capability UE may not expect a search space set opportunity within a first CORESET to completely or partially overlap in time with another search space set opportunity within the second CORESET. In some cases, the CORESET policy may include allowing a search space set opportunity for a first CORESET to completely overlap in time with another search space set opportunity for a second CORESET if the first CORESET and the second CORESET have the same frequency domain resource allocation and time domain OFDM symbol duration. That is, a reduced capability UE may expect a search space set opportunity for a first CORESET to completely overlap in time with another search space set opportunity for a second CORESET only if the first CORESET and the second CORESET have the same frequency domain resource allocation and time domain OFDM symbol duration.

[0070] In various aspects, the AL policy may set a higher level than the AL under the policy set for the second type of UE. For example, the AL policy may include a first minimum AL (e.g., AL=4) that is greater than a second minimum AL (e.g., AL=1) under the policy set for the second type of UE.

[0071] In various aspects, the TCI state policy may include a number of supported active TCI states configured for monitoring a PDCCH, independent of the number of supported active TCI states configured for a PDSCH associated with the PDCCH. That is, the number of supported active TCI states for the PDCCH may be less than, equal to, or greater than the number of supported active TCI states for the PDSCH. In various aspects, the TCI state policy may include a minimum number of supported active TCI states for the PDCCH, such as at least a single active TCI state configured for monitoring the PDCCH.

[0072] In various aspects, a UE may provide an indication to a network entity that the UE is a reduced-capability UE with certain policies. For example, the UE may send capability information to the network entity that indicates one or more policies for a first type of UE. In some cases, the UE may send a signal to the network entity indicating the one or more policies for the first type of UE. In various aspects, the signal includes a random access channel (RACH) preamble sequence indicating the one or more policies for the first type of UE.

[0073] In various aspects, the network entity may configure a CORESET for the UE in one or more BWPs according to various policies for the first type of UE as described herein. For example, after determining a PDCCH monitoring policy for the UE, the network entity may send a CORESET configuration indicating the number of PDCCH candidates within the BD limit and / or CCE limit, as described herein with respect to Figure 7A or Figure 7B described.

[0074] Figure 10 The diagram illustrates operations that may include those configured to perform the techniques disclosed herein, such as Figure 8 and Figure 9 1000 (e.g., a UE or BS) includes various components (e.g., corresponding to means plus function components) for the operations shown in FIG. The communication device 1000 includes a processing system 1002 coupled to a transceiver 1008 (e.g., a transmitter and / or receiver). The transceiver 1008 is configured to transmit and receive signals for the communication device 1000, such as the various signals described herein, via an antenna 1010. The processing system 1002 can be configured to perform processing functions for the communication device 1000, including processing signals received and / or transmitted by the communication device 1000.

[0075] The processing system 1002 includes a processor 1004 coupled to a computer-readable medium / memory 1012 via a bus 1006. In some aspects, the computer-readable medium / memory 1012 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 1004, cause the processor 1004 to perform Figure 8 and Figure 9 , or other operations for performing the various techniques for low-complexity PDCCH monitoring discussed herein. In certain aspects, the computer-readable medium / memory 1012 stores code for receiving 1014, code for transmitting 1016, code for monitoring 1018, and / or code for determining 1020. In certain aspects, the processor 1004 has circuitry configured to implement the code stored in the computer-readable medium / memory 1012. The processor 1004 includes circuitry for receiving 1024, circuitry for transmitting 1026, circuitry for monitoring 1028, and / or circuitry for determining 1030.

[0076] The techniques described herein can be used for various wireless communication technologies such as NR (e.g., 5G NR), 3GPP Long Term Evolution (LTE), LTE Advanced (LTE-A), 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), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and other networks. The terms "network" and "system" are generally used interchangeably. A CDMA network can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and the like. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95, and IS-856 standards. A TDMA network can implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA networks can implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, and the like. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, 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). NR is an emerging wireless communication technology under development.

[0077] In 3GPP, the term "cell" can refer to the coverage area of ​​a Node B (NB) and / or the NB subsystem serving that coverage area, depending on the context in which the term is used. In NR systems, the terms "cell" and "base station," next-generation Node B (gNB or gNodeB), access point (AP), distributed unit (DU), carrier, or transmit / receive point (TRP) are used interchangeably. A base station (BS) can provide communication coverage for macrocells, picocells, femtocells, and / or other types of cells. A macrocell can cover a relatively large geographic area (e.g., several kilometers in radius) and can allow unrestricted access to UEs with service subscriptions. A picocell can cover a relatively small geographic area and can allow unrestricted access to UEs with service subscriptions. A femtocell can cover a relatively small geographic area (e.g., a home) and can allow restricted access to UEs associated with the femtocell (e.g., UEs in a closed subscriber group (CSG), UEs for users in a home, etc.). A base station for a macrocell can be referred to as a macro BS. A base station for a picocell can be referred to as a pico BS. A base station for a femtocell can be referred to as a femto BS or a home BS.

[0078] A UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, customer premises equipment (CPE), a cellular phone, a smartphone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, an appliance, a medical device or medical equipment, a biometric sensor / device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring, a smart wristband, etc.), an entertainment device (e.g., a music device, a video device, a satellite radio, etc.), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing device, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium. Some UEs may be considered machine type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node can, for example, provide connectivity to or to a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs can be considered Internet of Things (IoT) devices, which can be narrowband IoT (NB-IoT) devices.

[0079] In some examples, access to the air interface can be scheduled. A scheduling entity (e.g., a BS) allocates resources for communications between some or all devices and equipment within its service area or cell. The scheduling entity can be responsible for scheduling, allocating, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduling communications, subordinate entities utilize resources allocated by the scheduled entity. The base station is not the only entity that can be used as a scheduling entity. In some examples, a UE can be used as a scheduling entity and can schedule resources for one or more subordinate entities (e.g., one or more other UEs), and other UEs can utilize the resources scheduled by the UE for wireless communications. In some examples, a UE can act as a scheduling entity in a peer-to-peer (P2P) network and / or a mesh network. In the mesh network example, in addition to communicating with the scheduling entity, UEs can also communicate directly with each other.

[0080] The method disclosed herein includes one or more steps or actions for implementing the method. Method steps and / or actions may be interchangeable with each other without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions may be modified without departing from the scope of the claims.

[0081] As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those items, including single members. As an example, "at least one of a, b, or c" is intended to encompass: a, b, c, ab, ac, bc, and abc, as well as any combination with multiples of the same elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0082] As used herein, the term "determining" includes a variety of actions. For example, "determining" may include calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, database, or another data structure), ascertaining, etc. Furthermore, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), etc. Furthermore, "determining" may include resolving, selecting, choosing, establishing, etc.

[0083] The previous description is provided to enable those skilled in the art to practice the various aspects described herein. Those skilled in the art will readily appreciate various modifications to these aspects, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but should conform to the full scope consistent with the language claims, wherein reference to an element in the singular is not intended to mean "one and only one" unless explicitly stated so, but rather "one or more." Unless otherwise expressly stated, the term "some" refers to one or more. All structural and functional equivalents of the elements throughout the various aspects described in this disclosure that are known or will later be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be contributed to the public, regardless of whether such disclosure is explicitly stated in the claims. An element of a claim should not be interpreted as being under the provisions of 35 U.S.C. § 112(f) unless the element is explicitly stated using the phrase "means for..." or, in the case of a method claim, the element is stated using the phrase "step for..."

[0084] The various operations of the above method can be performed by any appropriate component capable of performing the corresponding function. The component may include various hardware and / or software components and / or modules, including but not limited to circuits, application specific integrated circuits (ASICs) or processors. Generally speaking, where there are operations shown in the figures, those operations may have corresponding components plus functional components with similar numbers.

[0085] The various illustrative logical blocks, modules, and circuits described in connection with the disclosure herein may be implemented or performed with 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 designed to perform the functions herein, discrete gate or transistor logic, discrete hardware components, or any combination thereof. A general purpose processor may be a microprocessor, but alternatively, the processor may be any commercially available processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0086] If implemented in hardware, an exemplary hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. The bus may include any number of interconnecting buses and bridges, depending on the specific application and overall design constraints of the processing system. The bus may connect various circuits including a processor, a machine-readable medium, and a bus interface. The bus interface may be used to connect a network adapter to the processing system via the bus. The network adapter may be used to implement signal processing functions at the PHY layer. In a user terminal (see Figure 1 ), a user interface (e.g., a keypad, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits, such as timing sources, peripherals, voltage regulators, power management circuits, etc., which are well known in the art and will not be described further. The processor may be implemented using one or more general and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuits capable of executing software. Those skilled in the art will recognize how best to implement the described functionality of the processing system, which depends on the specific application and the overall design constraints imposed on the entire system.

[0087] If implemented in software, the functionality may be stored or transmitted as one or more instructions or code on a computer-readable medium. Software should be broadly interpreted to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. Computer-readable media include both computer storage media and communication media, including any medium that facilitates the transmission of a computer program from one location to another. The processor may be responsible for managing the bus and general processing, including the execution of software modules stored on a machine-readable storage medium. A computer-readable storage medium may be coupled to the processor so that the processor can read information from and write information to the storage medium. In an alternative embodiment, the storage medium may be integrated with the processor. As an example, the machine-readable medium may include a transmission line, a carrier modulated by data, and / or a computer-readable storage medium having instructions stored thereon that is separate from the wireless node, all of which can be accessed by the processor via a bus interface. Alternatively or in addition, the machine-readable medium or any portion thereof may be integrated into the processor, such as in the case of a cache memory and / or a general register file. As an example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read-only memory), PROM (programmable read-only memory), EPROM (erasable programmable read-only memory), EEPROM (electrically erasable programmable read-only memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage media, or any combination thereof. The machine-readable medium may be included in a computer program product.

[0088] A software module may include a single instruction or many instructions and may be distributed across several different code segments, in different programs, and across multiple storage media. A computer-readable medium may include multiple software modules. A software module includes instructions that, when executed by a device such as a processor, cause a processing system to perform various functions. A software module may include a sending module and a receiving module. Each software module may reside in a single storage device or be distributed across multiple storage devices. As an example, when a triggering event occurs, a software module may be loaded from a hard drive into RAM. During execution of a software module, the processor may load some instructions into a cache memory to increase access speed. One or more cache memory lines may then be loaded into a general register file for execution by the processor. When referring to the functions of a software module below, it should be understood that such functions are implemented by the processor when instructions from that software module are executed.

[0089] Furthermore, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a 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 (IR), radio, and microwave are included in the definition of medium. Disk and disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and optical disc. Optical disks, where magnetic disks generally reproduce data magnetically, and optical disks reproduce data optically using lasers. Thus, in some aspects, computer-readable media may include non-transitory computer-readable media (e.g., tangible media). Additionally, for other aspects, computer-readable media may include transitory computer-readable media (e.g., signals). Combinations of the above are also intended to be included within the scope of computer-readable media.

[0090] Thus, certain aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having stored thereon (and / or encoded thereon) instructions, the instructions being executable by one or more processors to perform the operations described herein, for example, for performing the operations described herein and in Figure 8 and / or Figure 9 Instructions for the operations shown in the figure.

[0091] In addition, it should be understood that the modules and / or other appropriate units for performing the methods and techniques described herein can be downloaded and / or otherwise obtained by the user terminal and / or base station, as applicable. For example, such a device can be coupled to a server to facilitate the transmission of components for performing the methods described herein. Alternatively, the various methods described herein can be provided via a storage component (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or a floppy disk, etc.) so that the user terminal and / or base station can obtain the various methods immediately after coupling or providing the storage component to the device. In addition, any other suitable technology for providing the methods and techniques described herein to a device can be utilized.

[0092] It should be understood that the claims are not limited to the precise configuration and components described above, and that various modifications, changes, and variations may be made in the arrangement, operation, and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

1. A method for wireless communication by a user equipment (UE), comprising: determining one or more policies for UEs of a first type for monitoring one or more physical downlink control channels (PDCCHs) within one or more bandwidth parts (BWPs), wherein the one or more policies for the first type of UEs are different from a set of policies for UEs of a second type; and Signals from a network entity are monitored via the one or more PDCCHs according to the determined policy.

2. The method according to claim 1, wherein The one or more policies include at least one of the following: Blind decoding BD strategy, Control channel element CCE strategy, Control resource set CORESET strategy, Aggregation-level AL policy, or Transport Configuration Indicator TCI state policy.

3. The method according to claim 2, wherein: The BD policy includes a lower maximum value of BD for a subcarrier spacing SCS than under the policy set for the second type of UE.

4. The method according to claim 3, wherein: The BD policy includes a maximum number of BDs in a time-domain resource unit per SCS; The maximum number of BDs for a specific SCS provides a basic maximum number of BDs; and The maximum number of BDs for another SCS is determined by reducing the basic maximum number of BDs by a factor associated with the other SCS.

5. The method according to claim 3, wherein: The BD policy includes a maximum number of BDs in a time-domain resource unit per SCS; The maximum number of BDs per SCS includes a first maximum number of BDs for one or more common search spaces and a second maximum number of BDs for one or more UE-specific search spaces; The second maximum number of BDs for a specific SCS provides a basic maximum number of BDs; and The second maximum number of BDs for another SCS is determined by reducing the basic maximum number of BDs by a factor associated with the other SCS.

6. The method according to claim 2, wherein: The CCE policy includes monitoring fewer CCEs for SCS than under the policy set for the second type of UE.

7. The method according to claim 6, wherein: The CCE policy includes a maximum number of CCEs in a time-domain resource unit per SCS; The maximum number of CCEs for a particular SCS provides a basic maximum number of CCEs; and The maximum number of CCEs for another SCS is determined by reducing the basic maximum number of CCEs by a factor associated with the other SCS.

8. The method according to claim 6, wherein: The CCE policy includes a maximum number of CCEs in a time-domain resource unit per SCS; The maximum number of CCEs per SCS includes a first maximum number of CCEs for one or more common search spaces and a second maximum number of CCEs for one or more UE-specific search spaces; The second maximum number of CCEs for a particular SCS provides a basic maximum number of BDs; and The second maximum number of CCEs for another SCS is determined by reducing the basic maximum number of CCEs by a factor associated with the other SCS.

9. The method according to claim 2, wherein: The CORESET policy includes monitoring fewer CORESETs or search space sets per BWP than under the policy set for the second type of UE.

10. The method according to claim 9, wherein: The CORESET strategy includes monitoring of up to: Single CORESET per BWP; A single common search space set per BWP; and Single UE-specific search space set per BWP.

11. The method according to claim 2, wherein: The CORESET policy includes not allowing a search space set opportunity to completely overlap in time with another search space set opportunity from the same search space set or from a different search space set within the same CORESET.

12. The method according to claim 2, wherein: The CORESET policy includes not allowing a search space set opportunity within a first CORESET to fully or partially overlap in time with another search space set opportunity within a second CORESET.

13. The method according to claim 2, wherein: The CORESET strategy includes allowing a search space set opportunity for the first CORESET to completely overlap in time with another search space set opportunity for the second CORESET if the first CORESET and the second CORESET have the same frequency domain resource allocation and time domain symbol duration.

14. The method according to claim 2, wherein: The AL policy includes a first minimum AL that is greater than a second minimum AL under the policy set for the second type of UE.

15. The method according to claim 2, wherein: The TCI state policy includes a number of active TCI states configured for monitoring a physical downlink shared channel (PDSCH) associated with the PDCCH, independent of a number of active TCI states configured for the PDCCH.

16. The method according to claim 2, wherein: The TCI state policy includes allowing a single active TCI state to be configured for monitoring the PDCCH.

17. The method of claim 2, further comprising sending capability information indicating the one or more policies for the first type of UE to the network entity.

18. The method of claim 2, further comprising sending a signal to the network entity indicating the one or more policies for the first type of UE.

19. The method according to claim 18, wherein The signal includes a random access channel (RACH) preamble sequence indicating the one or more policies for the first type of UE.

20. A method for wireless communication by a network entity, comprising: determining one or more policies for transmitting signals via one or more physical downlink control channels (PDCCHs) within one or more bandwidth parts (BWPs) for a first type of user equipment (UE), wherein the one or more policies for the first type of UE are different from a set of policies for a second type of UE; and The signal is sent to the UE via the one or more PDCCHs according to the determined policy.

21. The method according to claim 20, wherein The one or more policies include at least one of the following: Blind decoding BD strategy, Control channel element CCE strategy, Control resource set CORESET strategy, Aggregation-level AL policy, or Transport Configuration Indicator TCI state policy.

22. The method according to claim 21, wherein The BD policy includes a lower maximum value of BD for a subcarrier spacing SCS than under the policy set for the second type of UE.

23. The method of claim 22, wherein: The BD policy includes a maximum number of BDs in a time-domain resource unit per SCS; The maximum number of BDs for a specific SCS provides a basic maximum number of BDs; and The maximum number of BDs for another SCS is determined by reducing the basic maximum number of BDs by a factor associated with the other SCS.

24. The method of claim 22, wherein: The BD policy includes a maximum number of BDs in a time-domain resource unit per SCS; The maximum number of BDs per SCS includes a first maximum number of BDs for one or more common search spaces and a second maximum number of BDs for one or more UE-specific search spaces; The second maximum number of BDs for a specific SCS provides a basic maximum number of BDs; and The second maximum number of BDs for another SCS is determined by reducing the basic maximum number of BDs by a factor associated with the other SCS.

25. The method according to claim 21, wherein The CCE policy includes monitoring fewer CCEs for SCS than under the policy set for the second type of UE.

26. The method of claim 25, wherein: The CCE policy includes a maximum number of CCEs in a time-domain resource unit per SCS; The maximum number of CCEs for a particular SCS provides a basic maximum number of CCEs; and The maximum number of CCEs for another SCS is determined by reducing the basic maximum number of CCEs by a factor associated with the other SCS.

27. The method of claim 25, wherein: The CCE policy includes a maximum number of CCEs in a time-domain resource unit per SCS; The maximum number of CCEs per SCS includes a first maximum number of CCEs for one or more common search spaces and a second maximum number of CCEs for one or more UE-specific search spaces; The second maximum number of CCEs for a specific SCS provides a basic maximum number of BDs; as well as The second maximum number of CCEs for another SCS is determined by reducing the basic maximum number of CCEs by a factor associated with the other SCS.

28. The method according to claim 21, wherein The CORESET policy includes configuring fewer CORESETs or search space sets per BWP than under the policy set for the second type of UE.

29. The method according to claim 28, wherein The CORESET strategy includes the following configurations: Single CORESET per BWP; A single common search space set per BWP; and Single UE-specific search space set per BWP.

30. The method according to claim 21, wherein The CORESET policy includes not allowing a search space set opportunity to completely overlap in time with another search space set opportunity from the same search space set or from a different search space set within the same CORESET.

31. The method according to claim 21, wherein The CORESET policy includes not allowing a search space set opportunity within a first CORESET to fully or partially overlap in time with another search space set opportunity within a second CORESET.

32. The method of claim 21, wherein: The CORESET strategy includes allowing a search space set opportunity for the first CORESET to completely overlap in time with another search space set opportunity for the second CORESET if the first CORESET and the second CORESET have the same frequency domain resource allocation and time domain symbol duration.

33. The method of claim 21, wherein The AL policy includes a first minimum AL that is greater than a second minimum AL under the policy set for the second type of UE.

34. The method of claim 21, wherein The TCI state policy includes a number of active TCI states configured for monitoring a physical downlink shared channel (PDSCH) associated with the PDCCH, independent of a number of active TCI states configured for the PDCCH.

35. The method of claim 21, wherein The TCI state policy includes allowing a single active TCI state to be configured for monitoring the PDCCH.

36. The method of claim 21, further comprising receiving capability information from the UE indicating the one or more policies for the first type of UE.

37. The method of claim 21, further comprising receiving a signal from the UE indicating the one or more policies for the first type of UE.

38. The method of claim 37, wherein: The signal includes a random access channel (RACH) preamble sequence indicating the one or more policies for the first type of UE.

39. An apparatus for wireless communication, comprising: at least one processor configured to determine one or more policies for a first type of user equipment, UE, for monitoring one or more physical downlink control channels, PDCCHs, within one or more bandwidth parts, BWPs, wherein the one or more policies for the first type of UE are different from a set of policies for a second type of UE; a transceiver configured to monitor signals from a network entity via the one or more PDCCHs according to the determined policy; and A memory is coupled to the at least one processor.

40. An apparatus for wireless communication, comprising: at least one processor configured to determine, for a first type of user equipment (UE), one or more policies for transmitting signals via one or more physical downlink control channels (PDCCHs) within one or more bandwidth parts (BWPs), wherein the one or more policies for the first type of UE are different from a set of policies for a second type of UE; a transceiver configured to transmit the signal to the UE via the one or more PDCCHs according to the determined policy; and A memory is coupled to the at least one processor.

41. An apparatus for wireless communication, comprising: means for determining one or more policies for monitoring one or more physical downlink control channels (PDCCHs) within one or more bandwidth parts (BWPs) for a first type of user equipment (UE), wherein the one or more policies for the first type of UE are different from a set of policies for a second type of UE; and Means for monitoring signals from a network entity via the one or more PDCCHs according to the determined policy.

42. An apparatus for wireless communication, comprising: means for determining one or more policies for transmitting signals via one or more physical downlink control channels (PDCCHs) within one or more bandwidth parts (BWPs) for a first type of user equipment (UE), wherein the one or more policies for the first type of UE are different from a set of policies for a second type of UE; and means for transmitting the signal to the UE via the one or more PDCCHs according to the determined policy.

43. A computer-readable medium having stored thereon instructions for: means for determining one or more strategies for monitoring one or more physical downlink control channels (PDCCHs) within one or more bandwidth parts (BWPs) for user equipment (UE) of a first type, wherein: The one or more policies for the first type of UE are different from a set of policies for the second type of UE; as well as Signals from a network entity are monitored via the one or more PDCCHs according to the determined policy.

44. A computer-readable medium having stored thereon instructions for: determining one or more strategies for transmitting signals via one or more physical downlink control channels (PDCCHs) of one or more bandwidth parts (BWPs) for user equipment (UE) of a first type, wherein: The one or more policies for the first type of UE are different from a set of policies for the second type of UE; as well as The signal is sent to the UE via the one or more PDCCHs according to the determined policy.

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