Method, apparatus and medium for wireless communication

Abstract

Methods, systems, and devices for wireless communication are described. The method comprises: receiving DCI with a first AL in a CORESET configured with a broadband DMRS, the DCI comprising an authorization for a resource set of a downlink shared channel that overlaps with the CORESET; identifying an AL ambiguity between the DCI transmitted with the first AL and a DCI transmitted with a second AL, where the first AL corresponds to a first set of CCEs and the second AL corresponds to a second set of CCEs that at least partially overlaps the first set of CCEs; and receiving the downlink shared channel on the set of resources, where the receiving the downlink shared channel includes rate matching the set of resources around a portion of the second set of CCEs that does not include the first set of CCEs.

Description

[0001] This application is a divisional application of an invention patent application with an application date of July 10, 2019, application number 201980045786.X, and invention name “Shared channel rate matching with a wideband demodulation reference signal of a control channel”.

[0002] Cross-references

[0003] This patent application claims the benefits of U.S. Provisional Patent Application No. 62 / 696,572, filed by Xu et al. on July 11, 2018, entitled “Shared Channel Rate Matching with Wideband Demodulation Reference Signal for a Control Channel”; and U.S. Patent Application No. 16 / 506,743, filed by Xu et al. on July 9, 2019, entitled “Shared Channel Rate Matching with Wideband Demodulation Reference Signal for a Control Channel”; each of which has been assigned to its assignee. Background Art

[0004] The following relates generally to wireless communications, and more particularly to shared channel rate matching with a wideband demodulation reference signal (DMRS) of a control channel.

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, etc. These systems may be able to 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, advanced LTE (LTE-A) systems, or LTE-A Pro systems) and fifth generation (5G) systems that may be referred to as new radio (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 OFDM (DFT-S-OFDM). A wireless multiple access communication system may include multiple base stations or network access nodes, each of which simultaneously supports communication of multiple communication devices, which may be referred to as user equipment (UE). Summary of the invention

[0006] The described technology relates to improved methods, systems, devices and apparatuses for supporting shared channel rate matching with a wideband demodulation reference signal (DMRS) of a control channel. A base station that wirelessly communicates with a user equipment (UE) may send downlink control information (DCI) within a control resource set (CORESET) configured with a wideband DMRS or a narrowband DMRS. The DCI may include a grant for a set of time and frequency resources for a downlink shared channel that overlaps with the CORESET. The CORESET in which the DCI is sent may include multiple non-intersecting fragments of resource blocks (RBs). The DCI may also be at least partially located within a first fragment of the multiple non-intersecting fragments, and a second fragment of the multiple non-intersecting fragments may not include the DCI.

[0007] The UE may determine a rate matching operation for the wideband DMRS of the downlink shared channel for a portion of the resource set that overlaps with the second segment in the disjoint segments. The UE may identify AL ambiguity at one AL because DCI may be sent at a second aggregation level (AL). The first AL may correspond to a first control channel element (CCE) set, and the second AL may correspond to a second CCE set that at least partially overlaps with the first CCE set. The UE may receive the downlink shared channel on the resource set by rate matching the resource set around a portion of the second CCE set that does not include the first CCE set.

[0008] A wireless communication method is described. The method may include: receiving DCI within a CORESET, the CORESET being configured with a wideband demodulation reference signal (DMRS) and including a plurality of disjoint segments of resource blocks (RBs), wherein the DCI is at least partially located within a first segment of the set of disjoint segments, and a second segment of the set of disjoint segments does not include the DCI, and wherein the DCI includes a grant for a resource set for a downlink shared channel that overlaps with the CORESET; determining a rate matching operation for the downlink shared channel for the wideband DMRS for a portion of the resource set that overlaps with the second segment of the set of disjoint segments; and receiving the downlink shared channel on the resource set based on the determined rate matching operation.

[0009] An apparatus for wireless communication is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executed by the processor to cause the apparatus to receive a DCI within a CORESET, the CORESET being configured with a wideband DMRS and including a set of disjoint segments of resource blocks (RBs), wherein the DCI is at least partially located within a first segment in the set of disjoint segments, and a second segment in the set of disjoint segments does not include the DCI, and wherein the DCI includes a grant for a resource set for a downlink shared channel that overlaps with the CORESET; determine a rate matching operation for the downlink shared channel for the wideband DMRS for a portion of the resource set that overlaps with the second segment in the set of disjoint segments; and receive the downlink shared channel on the resource set based on the determined rate matching operation.

[0010] Another apparatus for wireless communication is described. The apparatus may include means for: receiving a DCI within a CORESET configured with a wideband DMRS and including a set of disjoint segments of RBs, wherein the DCI is at least partially within a first segment of the set of disjoint segments and a second segment of the set of disjoint segments does not include the DCI, and wherein the DCI includes a grant for a resource set for a downlink shared channel that overlaps with the CORESET; determining a rate matching operation for the downlink shared channel for the wideband DMRS for a portion of the resource set that overlaps with the second segment of the set of disjoint segments; and receiving the downlink shared channel on the resource set based on the determined rate matching operation.

[0011] A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable by a processor to: receive DCI within a CORESET, the CORESET being configured with a wideband DMRS and including a set of disjoint segments of RBs, wherein the DCI is at least partially within a first segment of the set of disjoint segments and a second segment of the set of disjoint segments does not include the DCI, and wherein the DCI includes a grant for a resource set for a downlink shared channel that overlaps with the CORESET; determine a rate matching operation for the downlink shared channel for the wideband DMRS for a portion of the resource set that overlaps with the second segment of the set of disjoint segments; and receive the downlink shared channel on the resource set based on the determined rate matching operation.

[0012] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the rate matching operation includes performing rate matching around a location of a configured wideband DMRS in a portion of a resource set for the downlink shared channel that overlaps with the second segment in a set of disjoint segments.

[0013] A method for wireless communication is described, comprising: receiving downlink control information (DCI) at a first aggregation level (AL) within a control resource set (CORESET) configured with a wideband demodulation reference signal (DMRS), wherein the DCI includes a grant for a resource set for a downlink shared channel overlapping with the CORESET; identifying AL ambiguity between the DCI sent at the first AL and the DCI sent at a second AL, wherein the first AL corresponds to a first control channel element (CCE) set and the second AL corresponds to a second CCE set that at least partially overlaps with the first CCE set; and receiving the downlink shared channel on the resource set, wherein the receiving the downlink shared channel includes rate matching the resource set around a portion of the second CCE set that does not include the first CCE set.

[0014] An apparatus for wireless communication is described, comprising: a processor, a memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the device to: receive downlink control information (DCI) at a first aggregation level (AL) within a control resource set (CORESET) configured with a wideband demodulation reference signal (DMRS), wherein the DCI includes a grant for a resource set for a downlink shared channel overlapping with the CORESET; identify AL ambiguity between the DCI sent at the first AL and the DCI sent at a second AL, wherein the first AL corresponds to a first control channel element (CCE) set and the second AL corresponds to a second CCE set that at least partially overlaps with the first CCE set; and receive the downlink shared channel on the resource set, wherein the receiving the downlink shared channel includes rate matching the resource set around a portion of the second CCE set that does not include the first CCE set.

[0015] An apparatus for wireless communication is described, comprising: means for receiving downlink control information (DCI) at a first aggregation level (AL) within a control resource set (CORESET) configured with a wideband demodulation reference signal (DMRS), wherein the DCI comprises a grant for a resource set for a downlink shared channel overlapping with the CORESET; means for identifying AL ambiguity between DCI sent at the first AL and DCI sent at a second AL, wherein the first AL corresponds to a first set of control channel elements (CCEs) and the second AL corresponds to a second set of CCEs that at least partially overlaps with the first set of CCEs; and means for receiving the downlink shared channel on the resource set, wherein the receiving the downlink shared channel comprises rate matching the resource set around a portion of the second set of CCEs that does not include the first set of CCEs.

[0016] A non-transitory computer-readable medium is described that stores code for wireless communication, the code including instructions executable by a processor to perform the following operations: receiving downlink control information (DCI) at a first aggregation level (AL) within a control resource set (CORESET) configured with a wideband demodulation reference signal (DMRS), wherein the DCI includes a grant for a resource set for a downlink shared channel that overlaps with the CORESET; identifying AL ambiguity between the DCI sent at the first AL and the DCI sent at a second AL, wherein the first AL corresponds to a first control channel element (CCE) set and the second AL corresponds to a second CCE set that at least partially overlaps with the first CCE set; and receiving the downlink shared channel on the resource set, wherein the receiving the downlink shared channel includes rate matching the resource set around a portion of the second CCE set that does not include the first CCE set.

[0017] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the rate matching operation includes processing the location of the configured wideband DMRS in the portion of the resource set for the downlink shared channel that overlaps with the second fragment in the set of disjoint fragments as a data resource of the downlink shared channel.

[0018] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving an indication in the DCI to rate match the downlink shared channel around resources of the CORESET.

[0019] A wireless communication method is described. The method may include: receiving DCI at a first aggregation level (AL) within a CORESET configured with a wideband DMRS, wherein the DCI includes a grant for a resource set for a downlink shared channel overlapping with the CORESET; identifying AL ambiguity between DCI sent at the first AL and DCI sent at a second AL, wherein the first AL corresponds to a first set of CCEs and the second AL corresponds to a second set of CCEs that at least partially overlaps with the first set of CCEs; and receiving the downlink shared channel on the resource set, wherein the receiving the downlink shared channel includes rate matching the resource set around a portion of the second set of CCEs that does not include the first set of CCEs.

[0020] An apparatus for wireless communication is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executed by the processor to cause the apparatus to: receive DCI at a first AL within a CORESET configured with a wideband DMRS, wherein the DCI includes a grant for a resource set for a downlink shared channel that overlaps with the CORESET; identify AL ambiguity between DCI sent at the first AL and DCI sent at a second AL, wherein the first AL corresponds to a first CCE set and the second AL corresponds to a second CCE set that at least partially overlaps with the first CCE set; and receive the downlink shared channel on the resource set, wherein the receiving the downlink shared channel includes rate matching the resource set around a portion of the second CCE set that does not include the first CCE set.

[0021] Another apparatus for wireless communication is described. The apparatus may include means for: receiving DCI at a first AL within a CORESET configured with a wideband DMRS, wherein the DCI includes a grant for a resource set for a downlink shared channel that overlaps with the CORESET; identifying AL ambiguity between DCI sent at the first AL and DCI sent at a second AL, wherein the first AL corresponds to a first set of CCEs and the second AL corresponds to a second set of CCEs that at least partially overlaps with the first set of CCEs; and receiving the downlink shared channel on the resource set, wherein the receiving the downlink shared channel includes rate matching the resource set around a portion of the second set of CCEs that does not include the first set of CCEs.

[0022] A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable by a processor to: receive DCI at a first AL within a CORESET configured with a wideband DMRS, wherein the DCI includes a grant for a resource set for a downlink shared channel overlapping with the CORESET; identify AL ambiguity between DCI sent at the first AL and DCI sent at a second AL, wherein the first AL corresponds to a first set of CCEs and the second AL corresponds to a second set of CCEs that at least partially overlaps with the first set of CCEs; and receive the downlink shared channel on the resource set, wherein the receiving the downlink shared channel includes rate matching the resource set around a portion of the second set of CCEs that does not include the first set of CCEs.

[0023] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the CORESET includes a set of non-intersecting segments of RBs, and wherein the first CCE set may be located within a first subset of the set of non-intersecting segments, and at least a portion of the portion of the second CCE set that may not include the first CCE set may be located within a second subset of the set of non-intersecting segments.

[0024] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the plurality of disjoint segments of the RB are contiguous.

[0025] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the receiving the downlink shared channel includes rate matching the set of resources around locations of the configured wideband DMRS in the second subset of the set of disjoint segments.

[0026] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, at least one segment in the set of non-intersecting segments may not include the first CCE set and the second CCE set, and wherein the receiving the downlink shared channel includes processing the position of the configured wideband DMRS in the portion overlapping with the at least one segment in the set of non-intersecting segments in a resource set for the downlink shared channel as a data resource of the downlink shared channel.

[0027] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, at least one segment in the set of non-intersecting segments may not include the first CCE set and the second CCE set, and wherein the receiving the downlink shared channel includes performing rate matching around the location of the configured wideband DMRS in the portion of the resource set for the downlink shared channel that overlaps with the at least one segment in the set of non-intersecting segments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 and 2 An example of a wireless communication system supporting shared channel rate matching with a wideband demodulation reference signal (DMRS) of a control channel in accordance with aspects of the present disclosure is shown.

[0029] Figure 3A and 3B An example of a configuration supporting shared channel rate matching with wideband DMRS of a control channel in accordance with aspects of the present disclosure is shown.

[0030] Figure 4A and 4B An example of a configuration supporting shared channel rate matching with wideband DMRS of a control channel in accordance with aspects of the present disclosure is shown.

[0031] Figure 5A and 5B An example of a configuration supporting shared channel rate matching with wideband DMRS of a control channel in accordance with aspects of the present disclosure is shown.

[0032] Figure 6 An example of a process flow to support shared channel rate matching for wideband DMRS with a control channel in accordance with aspects of the present disclosure is shown.

[0033] Figure 7 and 8 A block diagram of an apparatus supporting shared channel rate matching for wideband DMRS with a control channel in accordance with aspects of the present disclosure is shown.

[0034] Fig. 9 Diagrams of systems including devices supporting shared channel rate matching for wideband DMRS with control channels are shown in accordance with aspects of the present disclosure.

[0035] Fig.10 and 11 A flow chart illustrating a method of supporting shared channel rate matching with wideband DMRS of a control channel according to aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0036] A user equipment (UE) may establish a connection with a base station, which may allocate time and frequency resources to the UE for downlink and uplink communications. The UE may be configured to monitor a control resource set (CORESET) in which downlink control information (DCI) is sent. A CORESET may include a plurality of resource blocks (RBs) in the frequency domain and may include one or more modulation symbols in the time domain. A CORESET may include a total set of resources allocated for control information for a UE and may include, in some examples, one or more control channel elements (CCEs) corresponding to one or more physical downlink control channel (PDCCH) candidates.

[0037] In some cases, the CORESET may be configured with a wideband demodulation reference signal (DMRS) or a narrowband DMRS. In some cases, the CORESET in which the DCI is sent may include multiple disjoint segments of RBs. The DCI may also be at least partially located within a first segment of the multiple disjoint segments, and a second segment of the multiple disjoint segments may not include the DCI. The UE may determine a rate matching operation for the wideband DMRS of the downlink shared channel for a portion of the resource set that overlaps with the second segment of the disjoint segments. The UE may also identify AL ambiguity between DCIs when the DCI is sent at a first aggregation level (AL) but may also be sent at a second AL. The first AL may correspond to a first CCE set, and the second AL may correspond to a second CCE set that at least partially overlaps with the first CCE set. The UE may receive the downlink shared channel on the resource set by rate matching the resource set around a portion of the second CCE set that does not include the first CCE set. By configuring the UE with these schemes, the UE may enhance resource utilization while also improving the efficiency of wireless communications between a base station and the UE.

[0038] Various aspects of the present disclosure are first described in the context of a wireless communication system. Various aspects of the present disclosure are then described with reference to configurations and process flows involving shared channel rate matching of a wideband DMRS with a control channel. Various aspects of the present disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flow charts involving shared channel rate matching of a wideband DMRS with a control channel.

[0039] Figure 1An example of a wireless communication system 100 supporting shared channel rate matching of a wideband DMRS of a control channel in accordance with various 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 may be a long term evolution (LTE) network, an advanced LTE (LTE-A) network, an LTE-A Pro network, or a new radio (NR) network. In some cases, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low-latency communications, or communications with low-cost and low-complexity devices.

[0040] 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 may be referred to by those skilled in the art as a base station transceiver, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next generation NodeB or a giga-nodeB (any of which may be referred to as a gNB), a home NodeB, a home eNodeB, or some other suitable term. The wireless communication system 100 may include different types of base stations 105 (e.g., macro cell base stations 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, and relay base stations, among others.

[0041] 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 a 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 utilize 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, or a downlink transmission from the base station 105 to the UE 115. Downlink transmissions may also be referred to as forward link transmissions, and uplink transmissions may also be referred to as reverse link transmissions.

[0042] The geographic coverage area 110 of the base station 105 can be divided into sectors that constitute only 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 type of cell, or various combinations thereof. In some examples, the base station 105 can be mobile and thus provide communication coverage for a mobile geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, and the same base station 105 or different base stations 105 can support overlapping geographic coverage areas 110 associated with different technologies. 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.

[0043] The term "cell" refers to a logical communication entity used for communication 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 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 Things (NB-IoT), enhanced mobile broadband (eMBB), or other protocol types) that may provide access to different types of devices. In some cases, the term "cell" may refer to a portion (e.g., a sector) of a geographic coverage area 110 on which the logical entity operates.

[0044] UE 115 may be dispersed throughout the wireless communication system 100, and each UE 115 may be fixed or mobile. UE 115 may also be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a user device, or some other suitable term, where "device" may also be referred to as a unit, a station, a terminal, or a client. UE 115 may 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 may 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 may be implemented in various articles such as electrical appliances, vehicles, meters, etc.

[0045] Some UEs 115, such as MTC or IoT devices, may be low-cost or low-complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other or with a base station 105 without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay the information to a central server or application, which may utilize the information or present the information to humans interacting with the program or application. Some UEs 115 may be designed to collect information or implement automated behavior of machines. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business billing.

[0046] Some UEs 115 may be configured to employ a reduced power consumption mode of operation, such as half-duplex communication (e.g., a mode supporting unidirectional communication via transmission or reception but not simultaneous transmission and reception). In some examples, half-duplex communication may be performed at a reduced peak rate. Other power saving techniques for UE 115 include entering a power saving "deep sleep" mode when not engaged in active communication, or operating over a limited bandwidth (e.g., based on narrowband communication). In some cases, UE 115 may be designed to support critical functions (e.g., mission-critical functions), and the wireless communication system 100 may be configured to provide ultra-reliable communication for these functions.

[0047] In some cases, UE 115 may also be able to communicate directly with other UE 115 (e.g., using peer-to-peer (P2P) or device-to-device (D2D) protocols). One or more of a group of UEs 115 utilizing D2D communication may be within the geographic coverage area 110 of the base station 105. Other UEs 115 in the group may be outside the geographic coverage area 110 of the base station 105 or may not be able to receive transmissions from the base station 105. In some cases, multiple groups of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, in which each UE 115 transmits to each other UE 115 in the group. In some cases, the base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without the involvement of the base station 105.

[0048] The base stations 105 may communicate with the core network 130 and with each other. For example, the base stations 105 may interface with the core network 130 via a backhaul link 132 (e.g., via S1, N2, N3, or other interfaces). 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 X2, Xn, or other interfaces).

[0049] 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 for UE 115 served by a base station 105 associated with the EPC. User IP packets may be transmitted via 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 a network operator IP service. Operator IP services may include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or a packet switched (PS) streaming service.

[0050] 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 transport 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).

[0051] The wireless communication system 100 can operate using one or more frequency bands typically in the range of 300 MHz to 300 GHz. Typically, because the length of the wavelength ranges from about one decimeter to one meter, the region of 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band. Buildings and environmental features may block or redirect UHF waves. However, the waves can penetrate the structure sufficiently so that the macrocell provides service to the UE 115 located indoors. Compared to transmission of smaller frequencies and longer waves using the high frequency (HF) or ultra-high frequency (VHF) portion of the spectrum below 300 MHz, transmission of UHF waves can be associated with smaller antennas and shorter distances (e.g., less than 100 km).

[0052] The wireless communication system 100 may also operate in the Super High Frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as centimeter bands. The SHF region includes frequency bands such as the 5 GHz Industrial, Scientific, and Medical (ISM) band, which may be used opportunistically by devices that may tolerate interference from other users.

[0053] The wireless communication system 100 may also operate in the ultra-high frequency (EHF) region of the spectrum, also known as the millimeter band (e.g., from 30 GHz to 300 GHz). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices may be smaller and more closely spaced than the UHF antennas. In some cases, this may facilitate the use of antenna arrays within the UE 115. However, the propagation of EHF transmissions may be affected by greater atmospheric attenuation and shorter distances than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions using one or more different frequency regions, and the designated use of frequency bands across these frequency regions may vary from country to country or regulatory agency.

[0054] In some cases, the wireless communication system 100 can utilize both licensed radio spectrum bands and unlicensed radio spectrum bands. For example, the wireless communication system 100 can adopt license assisted access (LAA), unlicensed LTE (LTE-U) radio access technology, or NR technology in unlicensed bands such as the 5GHz ISM band. When operating in an unlicensed radio spectrum band, wireless devices such as base stations 105 and UE 115 can adopt a listen-before-talk (LBT) procedure to ensure that the channel is cleared before sending data. In some cases, operations in unlicensed bands can be based on a combined CA configuration with a CC operating in a licensed band (e.g., LAA). Operations in unlicensed spectrum can include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these. Duplexing in unlicensed spectrum can be based on frequency division duplexing (FDD), time division duplexing (TDD), or a combination of both.

[0055] In some examples, the base station 105 or the UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. For example, the wireless communication system 100 may use a transmission scheme between a transmitting device (e.g., a base station 105) and a receiving device (e.g., a UE 115), wherein the transmitting device is equipped with multiple antennas and the receiving device is equipped with one or more antennas. MIMO communication may employ multipath signal propagation to improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing. Multiple signals may be transmitted, for example, by a transmitting device via different antennas or different combinations of antennas. Similarly, multiple signals may be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams. Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO technology includes single-user MIMO (SU-MIMO) that transmits multiple spatial layers to the same receiving device and multi-user MIMO (MU-MIMO) that transmits multiple spatial layers to multiple devices.

[0056] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used in a transmitting device or a receiving device (e.g., a base station 105 or a UE 115) to shape or steer an antenna beam (e.g., a transmit beam or a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining signals conveyed via antenna elements of an antenna array so that signals propagating in a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals transmitted via antenna elements can include the transmitting device or the receiving device applying certain amplitude and phase offsets to signals carried via each of the antenna elements associated with the device. The adjustments associated with each of the antenna elements can be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0057] In one example, the base station 105 may use multiple antennas or antenna arrays to perform beamforming operations for directional communications with the UE 115. For example, some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be sent multiple times by the base station 105 in different directions, which may include signals sent according to different beamforming weight sets associated with different transmission directions. Transmissions in different beam directions may be used to identify (e.g., by the base station 105 or a receiving device such as the UE 115) the beam direction for subsequent transmission and / or reception by the base station 105. The base station 105 may send some signals, such as data signals associated with a specific receiving device, in a single beam direction (e.g., a direction associated with a receiving device such as the UE 115). In some examples, the beam direction associated with transmissions along a single beam direction may be determined based at least in part on signals sent in different beam directions. For example, UE 115 may receive one or more of the signals sent by base station 105 in different directions, and UE 115 may report an indication of the signal it received with the highest signal quality or otherwise acceptable signal quality to base station 105. Although these techniques are described with reference to signals sent by base station 105 in one or more directions, UE 115 may employ similar techniques to send signals multiple times in different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115) or to send signals in a single direction (e.g., to send data to a receiving device).

[0058] A receiving device (e.g., a UE 115, which may be an example of a mmW receiving device) may try multiple receive beams when receiving various signals such as synchronization signals, reference signals, beam selection signals, or other control signals from a base station 105. For example, a receiving device may try multiple receive directions by receiving via different antenna subarrays, processing signals received according to different antenna subarrays, receiving according to different receive beamforming weighting sets applied to signals received in multiple antenna elements of an antenna array, or processing signals received according to different receive beamforming weighting sets applied to signals received in multiple antenna elements of an antenna array, any of which may be referred to as "listening" according to different receive beams or receive directions. In some examples, a receiving device may use a single receive beam to receive along a single beam direction (e.g., when receiving a data signal). A single receive beam may be aligned in a beam direction determined at least in part based on listening according to different receive beam directions (e.g., a beam direction determined to have the highest signal strength, the highest signal-to-noise ratio, or otherwise acceptable signal quality based at least in part on listening according to multiple beam directions).

[0059] In some cases, the antennas of a base station 105 or a UE 115 may be located within one or more antenna arrays that support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly such as an antenna tower. In some cases, the antennas or antenna arrays associated with a base station 105 may be located at different geographic locations. A base station 105 may have an antenna array with rows and columns of multiple antenna ports that the base station 105 may use to support beamforming for communications with a UE 115. Likewise, a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.

[0060] In some cases, the wireless communication system 100 can be a packet-based network that operates according to a layered protocol stack. In the user plane, the communication at the bearer or packet data convergence protocol (PDCP) layer can be based on IP. In some cases, the radio link control (RLC) layer can perform packet segmentation and reorganization to communicate through logical channels. The media access control (MAC) layer can perform priority processing and multiplex logical channels into transmission channels. The MAC layer can also use hybrid automatic repeat request (HARQ) to provide retransmission in the MAC layer to improve link efficiency. In the control plane, the radio resource control (RRC) protocol layer can provide the establishment, configuration and maintenance of the RRC connection (supporting radio bearers for user plane data) between the UE 115 and the base station 105 or the core network 130. In the physical (PHY) layer, the transmission channel can be mapped to the physical channel.

[0061] In some cases, UE 115 and base station 105 can support retransmission of data to increase the possibility of data being successfully received. HARQ feedback is a technology that increases the possibility of correctly receiving data through communication link 125. HARQ can include a combination of error detection (e.g., using cyclic redundancy check (CRC)), forward error correction (FEC) and retransmission (e.g., automatic repeat request (ARQ)). Under poor radio conditions (e.g., signal-to-noise ratio conditions), HARQ can improve the throughput at the MAC layer. In some cases, a wireless device can support HARQ feedback for the same time slot, wherein the device can provide HARQ feedback for data received in a previous symbol in the time slot in a specific time slot. In other cases, the device can provide HARQ feedback in a subsequent time slot or according to some other time interval.

[0062] The time interval in LTE or NR can be expressed as a multiple of the basic time unit, which can, for example, refer to a sampling period of T = 1 / 30,720,000 seconds. The time interval of the communication resources can be organized according to radio frames each having a duration of 10 milliseconds (ms), where the frame period can be expressed as Tf = 307,200Ts. The radio frame can be identified by a system frame number (SFN) ranging from 0 to 1023. Each frame may include 10 subframes numbered 0 to 9, and each subframe may have a duration of 1 millisecond. The subframe may be further divided into 2 time slots, each time slot having a duration of 0.5ms, and each time slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix before each symbol period). In addition to the cyclic prefix, each symbol period may contain 2048 sampling periods. 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 minimum 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 shortened TTI (sTTI) or in selected component carriers using sTTI).

[0063] In some wireless communication systems, a time slot may be further divided into a plurality of mini-slots containing one or more symbols. In some instances, a symbol of a mini-slot or a mini-slot may be a minimum scheduling unit. For example, the duration of each symbol may vary depending on the subcarrier spacing or the operating frequency band. In addition, some wireless communication systems may implement time slot aggregation, in which a plurality of time slots or mini-slots are aggregated together and used for communication between UE 115 and base station 105.

[0064] The term "carrier" refers 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 the radio frequency spectrum that operates according to a physical layer channel for 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 E-UTRA Absolute Radio Frequency Channel Number (EARFCN)) and may be located according to a channel raster for discovery by a UE 115. A carrier may be a 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 over a carrier may be composed of multiple subcarriers (e.g., using a multi-carrier modulation (MCM) technique such as OFDM or DFT-s-OFDM).

[0065] The organization structure of the carrier may be different for different radio access technologies (e.g., LTE, LTE-A, LTE-A Pro, NR, etc.). For example, communications through the carrier may be organized according to TTIs or time slots, each of which may include user data and control information or signaling to support decoding of the user data. The carrier may also include control signaling and dedicated acquisition signaling (e.g., synchronization signals or system information, etc.) to coordinate the operation of the carrier. In some examples (e.g., in a carrier aggregation configuration), the carrier may also have control signaling or acquisition signaling to coordinate the operation of other carriers.

[0066] Physical channels may be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels may be multiplexed on a downlink carrier, for example, using a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. In some examples, control information sent in a physical control channel may be distributed in a cascaded manner between different control regions (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces).

[0067] A carrier may be associated with a particular bandwidth of the radio spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of a plurality of predetermined bandwidths of a carrier for a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz). In some examples, each served UE 115 may be configured to operate on part or all of the carrier bandwidth. In other examples, some UEs 115 may be configured to operate using a narrowband protocol type associated with a predefined portion or range (e.g., a set of subcarriers or RBs) within a carrier (e.g., an "in-band" deployment of a narrowband protocol type).

[0068] In a system using MCM technology, a resource element may consist of a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period is inversely proportional to the subcarrier spacing. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme). Therefore, the more resource elements received by UE 115 and the higher the order of the modulation scheme, the higher the data rate of UE 115 can be. In a MIMO system, wireless communication resources may refer to a combination of radio spectrum resources, time resources, and space resources (e.g., space layers), and the use of multiple space layers may further increase the data rate of communication with UE 115.

[0069] A device of the wireless communication system 100 (e.g., a base station 105 or a UE 115) may have a hardware configuration that supports communication on a specific carrier bandwidth, or may be configured to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 and / or a UE 115 that may support simultaneous communication via carriers associated with more than one different carrier bandwidths.

[0070] The wireless communication system 100 may support communication with the UE 115 on multiple cells or carriers, a feature that may be referred to as carrier aggregation (CA) or multi-carrier operation. Depending on the carrier aggregation configuration, the UE 115 may be configured with multiple downlink CCs and one or more uplink CCs. Carrier aggregation may be used with both FDD and TDD component carriers.

[0071] In some cases, the wireless communication system 100 can utilize an enhanced component carrier (eCC). An eCC can be characterized by one or more features including a wider carrier or frequency channel bandwidth, a shorter symbol duration, a shorter TTI duration, or a modified control channel configuration. In some cases, an eCC can be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have suboptimal or non-ideal backhaul links). An eCC can also be configured for use in an unlicensed spectrum or a shared spectrum (e.g., when more than one operator is allowed to use the spectrum). An eCC characterized by a wide carrier bandwidth can include one or more segments that a UE 115 can utilize that are unable to monitor the entire carrier bandwidth or are otherwise configured to use a limited carrier bandwidth (e.g., to save power).

[0072] In some cases, an eCC may utilize a different symbol duration than other CCs, which may include using a reduced symbol duration compared to the symbol duration of other CCs. A shorter symbol duration may be associated with an increased spacing between adjacent subcarriers. A device utilizing an eCC (such as a UE 115 or a base station 105) may transmit a wideband signal (e.g., according to a frequency channel or carrier bandwidth of 20, 40, 60, 80 MHz, etc.) with a reduced symbol duration (e.g., 16.67 microseconds). A TTI in an eCC may consist of one or more symbol periods. In some cases, the TTI duration (i.e., the number of symbol periods in a TTI) may be variable.

[0073] Wireless communication systems such as NR systems can utilize any combination of licensed, shared, and unlicensed spectrum bands, etc. The flexibility of eCC symbol duration and subcarrier spacing can allow the use of eCC across multiple spectrums. In some examples, NR shared spectrum can improve spectrum utilization and spectrum efficiency, particularly through dynamic vertical sharing (e.g., across frequency domain) and horizontal sharing (e.g., across time domain) of resources.

[0074] The base station 105 may send DCI within a CORESET configured with a wideband DMRS or a narrowband DMRS to the UE 115. The UE 115 may receive the DCI on the PDCCH. In some examples, the CORESET in which the DCI is sent may include multiple disjoint segments of RBs. The DCI may be at least partially located within a first segment of the multiple disjoint segments, and a second segment of the multiple disjoint segments may not include the DCI. The UE 115 may determine a rate matching operation for a downlink shared channel for a wideband DMRS for a portion of a resource set that overlaps with a second segment of the disjoint segments. In some cases, the UE 115 may identify an AL ambiguity between a DCI sent at a first AL and a DCI sent at a second AL. The first AL may correspond to a first CCE set, and the second AL may correspond to a second CCE set that at least partially overlaps with the first CCE set. By rate matching a resource set around a portion of the second CCE set that does not include the first CCE set, the UE 115 may receive a downlink shared channel on the resource set.

[0075] Figure 2 An example of a wireless communication system 200 that supports shared channel rate matching of a wideband DMRS with a control channel according to aspects of the present disclosure is shown. In some examples, the wireless communication system 200 can implement aspects of the wireless communication system 100. The wireless communication system 200 can include a base station 105-a and a UE 115-a, which can be a reference Figure 1 Examples of corresponding devices described.

[0076] The base station 105-a may perform communication procedures (e.g., RRC procedures such as cell acquisition procedures, random access procedures, RRC connection procedures, RRC configuration or reconfiguration procedures, etc.) with the UE 115-a. The base station 105-a and the UE 115-a may be configured with multiple antennas, which may be used for directional or beamforming transmissions. As part of the communication procedures, the base station 105-a may establish a two-way communication link 205 within the geographic area 110-a for communicating with the UE 115-a.

[0077] As part of the communication procedure, the base station 105-a can configure time and frequency resources to the UE 115-a for downlink and uplink communications in the wireless communication system 200. Time and frequency resources can be defined by resource elements (REs), resource blocks (RBs), or resource element groups (REGs), etc. REs can span one modulation symbol and one subcarrier. Each RE can also carry two, four, six, or eight physical channel bits, depending on whether the modulation scheme is QPSK, 16-QAM, 64-QAM, or 256-QAM. In some cases, two or more REs can be grouped into RBs, and each RB can span multiple subcarriers (e.g., twelve subcarriers) and multiple symbol periods (e.g., two, four, seven, etc.).

[0078] Following the communication procedure, the base station 105-a may send a scheduling command to the UE 115-a using the bidirectional communication link 205. For example, the base station 105-a may send the scheduling command in a DCI on the PDCCH 215 via the bidirectional communication link 205. The scheduling command may inform the UE 115-a of an upcoming data transmission via a physical data shared channel (PDSCH) 220 as well as other information such as RB allocations and a modulation scheme (e.g., QPSK, 16-QAM, 64-QAM, or 256-QAM).

[0079] In an example, the resource downlink and uplink transmission structure may include a control region and a data region, such as depicted in Figures 3 to 5. The control region and the data region may span multiple modulation symbols in the time domain and multiple subcarriers in the frequency domain. The control region may include PDCCH 215, and the data region may include PDSCH 220. In some examples, the control region and the data region may overlap in the time domain. In this example, as described herein, UE 115-a may reuse resources of a CORESET associated with PDCCH 215 as part of PDSCH 220. For example, PDSCH 220 may overlap with the CORESET of PDCCH 215, and resources that do not carry DCI and overlap with the CORESET may be used. Thus, in some cases, UE 115-a may receive DCI on PDCCH 215 within a segment of the CORESET, and receive related data on PDSCH 220 (and other PDSCH resources) within a second segment of the CORESET.

[0080] Prior to transmission of the PDCCH 215, the base station 105-a may process the PDCCH 215 by manipulating the DCI by appending a cyclic redundancy check (CRC) and error correction coding in a manner that may depend on a radio network temporary identifier (RNTI) of the UE 115-a. The base station 105-a may map the PDCCH 215 onto REs using a modulation scheme such as single antenna transmission or open-loop transmit diversity depending on the number of antenna ports. RE mapping for the PDCCH 215 may be organized using CCEs, each of which may include multiple REGs.

[0081] In an example where the wireless communication system 200 can implement aspects of an NR wireless communication system, the PDCCH 215 can be mapped to one or more CORESETs that include a set of CCEs. A CORESET can correspond to a control region in a traditional wireless communication system. In an NR wireless communication system, a CORESET can have both a frequency domain region and a time domain region defined by a base station 105-a (e.g., via RRC signaling).

[0082] Within the CORESET, the CCEs may be organized into search space sets by the base station 105-a. A search space set may include one or more search spaces, each of which may be associated with a different AL. A search space set may include one or more common search space sets for all or a group of UEs including UE 115-a that may be used to communicate with the base station 105-a. A common search space set may be located at a fixed position within a control region (e.g., a downlink control region). A search space set may also include a UE-specific search space set configured for a specific UE. These search space sets may have a position within the control region that depends on the RNTI of the UE. Each search space set (e.g., a common search space set or a UE-specific search space set) may contain several locations where the base station 105-a may send control information (e.g., DCI).

[0083] The search space set may also include a set of ALs for one or more DCI formats, where the combination of a DCI format and an AL may be referred to as a PDCCH candidate or "decoding candidate". The AL may be an indication of the number of CCEs used by the base station 105-a to send control information to the UE 115-a. For example, the search space set may include decoding candidates at ALs (AL1, AL2, AL4, AL8, and AL16) at 1, 2, 4, 8, or 16. Each AL may include the number of PDCCH candidates associated with different DCI formats. Each AL may correspond to the number of CCEs allocated to the PDCCH candidate. For example, AL4 may indicate that control information for the AL is sent in four CCEs of the CORESET. The base station 105-a may send DCI within a search space set in search space candidates (e.g., PDCCH candidates) for different ALs.

[0084] In some cases, a CORESET may have one or more disjoint segments of RBs across a control region. In an example, a first RB segment and a second RB segment corresponding to a CORESET may have the same frequency resources (e.g., the same subcarrier allocation), but different time resources (e.g., different modulation symbol allocation). Alternatively, the first RB segment and the second RB segment may correspond to different frequency resources (e.g., different subcarrier allocations), but within the same time resources (e.g., the same modulation symbol allocation). The RBs within a segment may be contiguous. In some cases, the RBs of a CORESET allocated to a PDCCH 215 may overlap with the RBs allocated to a PDSCH 220 scheduled by the PDCCH 215. In the case of overlapping RBs within the wireless communication system 200, there may be resources (e.g., time and frequency resources) wasted or unused by the UE 115-a. In order to reduce instances of unutilized resources and enable the UE 115-a to maximize resource utilization (e.g., PDSCH-related transmissions), the base station 105-a may configure a rate matching scheme to the UE 115-a. Additionally, there may be AL ambiguity regarding which AL to use for decoding a PDCCH candidate. The AL ambiguity may be a result of encoding the DCI with a longer AL, which may also result in a passing decode when only a subset corresponding to a lower AL is decoded. For example, when an AL16 PDCCH is transmitted, the UE 115-a may successfully decode the DCI using a CRC pass of 8 CCEs from the AL16 PDCCH that overlap with the CCEs of an AL8 PDCCH candidate. In this case, the UE 115-a may be unable (e.g., without resolving the ambiguity through additional decoding) to determine whether the DCI is encoded in AL8 or AL16. In some cases, the AL ambiguity may extend across different segments (e.g., AL8 candidates in the first segment and AL16 candidates in the first segment and the second segment).

[0085] To efficiently and effectively decode segments of the control region when RB overlap occurs, the base station 105-a may dynamically configure the UE 115-a (e.g., via DCI) to rate match the PDSCH 220 around the PDCCH 215 that schedules the PDSCH 220. The UE 115-a may receive the PDCCH 215, which may carry an indication that resources allocated to the PDSCH 220 partially overlap with RBs of a CORESET in which the PDCCH 215 is configured. When the UE 115-a is configured with such a rate matching scheme, the rate matching of the PDSCH 220 around the PDCCH 215 may maximize available resources (e.g., time and frequency resources) for the PDSCH 220. If the UE 115 - a is not configured with a rate matching scheme, the UE 115 - a may perform PDSCH 220 rate matching around the entire CORESET in which the sheduling PDCCH 215 is transmitted.

[0086] In some cases, narrowband DMRS or wideband DMRS may be configured by the base station 105-a in the CORESET for demodulation of the PDCCH 215. When narrowband DMRS is configured in the CORESET, the DMRS may be sent in RBs in the CCE that carry the PDCCH 215 payload. Alternatively, when wideband DMRS is configured in the CORESET, the DMRS may be sent in RBs in the CCE that carry the PDCCH 215 payload and RBs that do not carry the PDCCH 215 payload.

[0087] In an example, if a CORESET contains multiple segments (e.g., a set of CCEs) and wideband DMRS is configured by the base station 105-a, the UE 115-a may perform PDSCH rate matching after detection of the PDCCH 215. In some cases, the UE 115-a may perform rate matching around the CCEs of the PDCCH 215 being scheduled and around the locations of the configured wideband DMRS REs in all segments. Alternatively, the UE 115-a may perform rate matching around the CCEs of the PDCCH 215 being scheduled and around the locations of the wideband DMRS only in the segments containing the CCEs of the PDCCH 215. This may allow more resources to be available for the PDSCH 220 in the segments that do not contain the CCEs of the PDCCH 215 being scheduled. Thus, the rate matching behavior of UE 115-a can be independent of the behavior of base station 105-a (i.e., UE 115-a can perform PDSCH rate matching around the locations of wideband DMRS REs in segments that do not contain DCI, regardless of whether wideband DMRS is sent, as long as base station 105-a and UE 115-a have consistent information about whether base station 105-a is sending PDSCH 220 at the wideband DMRS RE locations).

[0088] In some cases, there may be a certain level of AL uncertainty, also referred to herein as "AL ambiguity," for decoding PDCCH candidates within the control region. For example, when base station UE 105-a transmits an AL16 PDCCH, UE 115-a may successfully decode the DCI using a CRC pass of 8 CCEs from the AL16 PDCCH that overlap with the CCEs of the AL8 PDCCH candidate. For example, such AL ambiguity may occur between AL8 PDCCH and AL16 PDCCH when the non-interleaved CORESET is one symbol in length (e.g., an OFDM symbol) and the AL8 and AL16 PDCCH candidates have the same starting CCE. To handle the AL ambiguity of decoding PDCCH candidates when the CCEs of the PDCCH candidates extend across different RB segments, UE 115-a may rate match for the PDSCH around the CCE using the highest AL. For example, when both narrowband DMRS and PDSCH rate matching schemes around a PDCCH being scheduled are configured, if there is an AL ambiguity state between AL8 and AL16, UE 115-a can successfully decode the PDCCH at AL8 or AL16 and perform rate matching for the PDSCH around the CCE of the AL16 PDCCH candidate and the narrowband DMRS embedded in the RB carrying the CCE of the AL16 PDCCH candidate. Alternatively, when both wideband DMRS and PDSCH rate matching schemes around a PDCCH being scheduled are configured, the PDSCH rate matching can depend on one or more factors. An example factor can be whether an AL8 or AL16 PDCCH candidate is detected. Another example factor can be whether PDSCH rate matching around wideband DMRS locations is performed in all segments or only in the segments containing the CCEs of the PDCCH candidates.

[0089] Figure 3A and 3B An example of a configuration 300 for supporting shared channel rate matching with a wideband DMRS of a control channel according to aspects of the present disclosure is shown. Figure 3A and 3B, configurations 300-a and 300-b may be implemented by various aspects of wireless communication systems 100 and 200. For example, configurations 300-a and 300-b may depict a control region and a data region. The control region may include a CORESET 305. Within the CORESET 305, there may be a reference signal embedded within an RB of a CCE, which may be a wideband DMRS or a narrowband DMRS. For example, the configured reference signal location 320 may correspond to a DMRS RE around which the PDSCH 310 may be rate matched by the UE 115-a. The data region may include the PDSCH 310. In some examples, the grant for the PDSCH 310 may include resources (e.g., time and frequency resources) that may at least partially overlap with the CORESET 305 in the time domain and / or frequency domain. Figure 3A and 3B , CORESET 305 is shown as overlapping in frequency with PDSCH 310 during time period 301. However, in some cases, only a portion (e.g., one or more segments or portions of a segment) of CORESET 305 may overlap with PDSCH 310 during time period 301.

[0090] refer to Figure 2 and 3A , UE 115-a can identify possible PDCCH candidates from CCE 315 (e.g., CCEs on which the base station may have sent PDCCH) within each search space set associated with CORESET 305. UE 115-a can monitor the search space set for PDCCH candidates and can perform blind decoding on PDCCH candidates 325 on the CCE, during which multiple decoding attempts are performed in the search space of the search space set until the DCI is detected. If certain PDCCH candidates are detected while monitoring the search space set (e.g., an AL16 PDCCH candidate or other PDCCH candidate without ambiguity is identified), UE 115-a may not need to process the AL ambiguity state between PDCCH candidates at different ALs. In this case, UE 115-a can perform rate matching around the CCEs of the PDCCH candidates and the wideband DMRS within the RBs carrying these CCEs. For example, UE 115-a can detect AL16 PDCCH candidates that span CCE 315-a and CCE 315-b. UE 115 - a may rate match around CCE 315 - a and CCE 315 - b that include configured reference signal locations 320 (eg, configured wideband DMRS locations).

[0091] In some cases, the UE 115-a may be configured (e.g., statically or via RRC signaling) to rate match the PDSCH 310 around the locations of the configured wideband reference signals (e.g., DMRS) throughout the CORESET 305. In some cases, the UE 115-a may be pre-configured to rate match the PDSCH 310 around the locations of the configured wideband DMRS throughout the CORESET 305, for example, if the UE 115-a rate matches the PDSCH 310 around the PDCCH being scheduled. Figure 3A As shown, for example, UE 115-a may rate match PDSCH 310 around the locations of the configured wideband DMRS REs outside of the RBs of the CCEs carrying the PDCCH candidates 325. For example, UE 115-a may rate match PDSCH 310 around the locations of the configured wideband DMRS REs in all segments, including segment 330-a containing CCEs of the PDCCH candidates 325 that schedule the PDSCH 310 and segment 335-a containing CCEs that do not contain the PDCCH candidates.

[0092] Alternatively, the UE 115-a may be configured (e.g., statically or via RRC signaling) to rate match the PDSCH 310 around the locations of the configured wideband DMRS in the segments of the CCEs that contain only the PDCCH candidates that schedule the PDSCH 310. In some cases, the UE 115-a may be pre-configured to rate match the PDSCH 310 around the locations of the configured wideband DMRS in the segments of the CCEs that contain only the PDCCH candidates that schedule the PDSCH 310, for example, if the UE 115-a rate matches the PDSCH 310 around the PDCCH being scheduled. Figure 3B , for example, UE 115-a may perform rate matching only in segment 330-b that includes CCEs for PDCCH candidates. For example, rate matching may be performed only on segment 330-b that includes CCE 315-a or CCE 315-b. Therefore, UE 115-a may assume that resources within segment 335-b corresponding to the location of the configured wideband DMRS are used for PDSCH 310. In these cases, base station 105-a may not send wideband reference signals within segment 335-b that do not overlap with the CCEs for the transmitted PDCCH candidates.

[0093] Figure 4B and 4B An example of a configuration 400 for supporting shared channel rate matching with wideband DMRS of a control channel according to aspects of the present disclosure is shown. Figure 4A and4B , configurations 400-a and 400-b may be implemented by aspects of wireless communication systems 100 and 200. For example, configurations 400-a and 400-b may depict a control region and a data region. The control region may include CORESET 405. CORESET 405 may be configured with a reference signal, which may be a wideband DMRS or a narrowband DMRS. The data region may include PDSCH 410. In some examples, PDSCH 410 may at least partially overlap with resources of CORESET 405 in the time domain and / or frequency domain. Figure 4A and 4B , CORESET 405 is shown as overlapping in frequency with PDSCH 410 during time period 401. However, in some cases, only a portion (e.g., one or more segments or portions of a segment) of CORESET 405 may overlap with PDSCH 410 during time period 401.

[0094] refer to Figure 2 and 4A , UE 115-a can identify possible PDCCH candidates from CCEs (e.g., CCE 415-a on which base station 105-a may have transmitted a PDCCH) within each search space set associated with CORESET 405. UE 115-a can monitor the search space set for PDCCH candidates and can perform blind decoding on the PDCCH candidates on CCE 425.

[0095] In some cases, the UE 115-a may be configured (e.g., statically, semi-statically via RRC signaling, or dynamically via DCI) to rate match the PDSCH 410 around the location 420 of the configured wideband reference signal (e.g., DMRS) across all segments. In some cases, the UE 115-a may be pre-configured to rate match the PDSCH 410 around the location 420 of the configured wideband reference signal (e.g., DMRS) across all segments. Figure 4A , an AL8 PDDCH may be detected in CCE 415-a, and UE 115-a may recognize that there is no AL ambiguity. In this case, UE 115-a may rate match the scheduled PDSCH 410 in all segments, including segment 430-a of CCEs containing PDCCH candidates (e.g., AL8 PDCCH candidates for CCE 415-a) and segment 435-a of CCEs that do not contain PDCCH candidates.

[0096] Alternatively, the base station 105-a may configure (e.g., statically, semi-statically via RRC signaling, or dynamically via DCI) the UE 115-a to not rate match the PDSCH 410 around the configured reference signal locations 420 of the segments that do not overlap with the CCEs carrying the detected PDCCH candidates. In some cases, the UE 115-a may be pre-configured to avoid rate matching the PDSCH 410 around the configured reference signal locations 420 of the segments that do not overlap with the CCEs carrying the detected PDCCH candidates. Figure 4B , an AL8 PDDCH candidate may be detected in CCE 415-a, and UE 115-a may recognize that there is no AL ambiguity state. In this case, UE 115-a may perform rate matching only in the segment of CCE 415-a that contains the AL8 PDCCH candidate (e.g., segment 430-b). Therefore, UE 115-a may assume that the resources within segment 435-b corresponding to the position of the configured wideband DMRS are used for the scheduled PDSCH. In these cases, base station 105-a may not send a wideband reference signal within segment 435-b that does not overlap with the CCE of the PDCCH being scheduled.

[0097] Figure 5A and 5B An example of a configuration 500 for supporting shared channel rate matching for wideband DMRS with a control channel according to aspects of the present disclosure is shown. Figure 5A and 5B , configurations 500-a and 500-b may be implemented by aspects of wireless communication systems 100 and 200. For example, configuration 500 may depict a control region and a data region. The control region may include a CORESET 505, which may be configured with a reference signal, which may be a wideband DMRS or a narrowband DMRS. The data region may include a PDSCH 510. In some examples, a grant for the PDSCH 510 may include resources (e.g., time and frequency resources) that may at least partially overlap with the CORESET 505 in the time domain and / or frequency domain. Figure 5A and 5B , CORESET 505 is shown as overlapping in frequency with PDSCH 510 during time period 501. However, in some cases, only a portion (e.g., one or more segments or portions of a segment) of CORESET 505 may overlap with PDSCH 510 during time period 501.

[0098] refer to Figure 2 and 5A, UE 115-a can identify possible PDCCH candidates (e.g., CCE 515-a and CCE 515-b on which base station 105-a may have transmitted a PDCCH) within each search space set associated with CORESET 505. UE 115-a can monitor the search space set for PDCCH candidates and can perform blind decoding on the PDCCH candidates on CCE 515-a and / or CCE 515-b.

[0099] refer to Figure 5A , if a first PDCCH candidate is detected and UE 115-a identifies an AL ambiguity state between the first PDCCH and a second PDCCH candidate, UE 115-a may perform rate matching on PDSCH 510 around CCE 515-a of the first PDCCH candidate. Depending on the rate matching configuration, rate matching may also be performed around the locations of wideband DMRS REs outside of the RBs carrying these CCEs.

[0100] refer to Figure 5A , a first PDDCH candidate may be detected in CCE 515-a, and UE 115-a may identify an AL ambiguity state (e.g., AL ambiguity between the first PDCCH candidate and a second PDCCH candidate at a higher AL). For example, the AL ambiguity state may be between the detected PDCCH candidate in CCE 515-a and the PDCCH candidate spanning CCE 515-a and CCE 515-b. In this case, UE 115-a may rate match the PDSCH around CCE 515-a and CCE 515-b. In some examples, UE 115-a may rate match around the position 520 of the configured wideband reference signal in all segments (e.g., including segment 530-a of the CCE containing the second larger PDCCH candidate and segment 535-a of the CCE not containing the PDCCH candidate) according to the rate matching configuration.

[0101] Alternatively, UE 115-a may be configured (e.g., via a rate matching configuration) to rate match around the position 520 of the configured wideband reference signal in a segment containing CCEs associated with a detected PDCCH candidate or any PDCCH candidate with AL ambiguity for the detected PDCCH candidate. That is, UE 115-a may be configured to not rate match around the position of the configured wideband reference signal that would be present in a segment (e.g., segment 535-b) if the segment contains CCEs associated with a detected PDCCH candidate or a candidate with AL ambiguity for the detected PDCCH candidate. The rate matching configuration may be statically configured for UE 115-a, or may be semi-statically configured for UE 115-a (e.g., via RRC signaling). In some cases, UE 115-a may avoid rate matching around the configured wideband reference signal locations 520 in segments that do not contain any CCEs associated with a detected PDCCH candidate or any PDCCH candidate with an AL ambiguity state. Figure 5B , UE 115-a may rate match around the position 520 of the configured wideband reference signal in segment 530-b containing CCEs of the second larger PDCCH candidate (e.g., CCE 515-a and / or CCE 515-b) but not in segment 535-b containing CCEs of the AL16 PDCCH candidate. Therefore, UE 115-a may consider that the resources corresponding to the wideband reference signal within segment 535-b are used for PDSCH. In these cases, the base station may not send a wideband reference signal within segment 535-b that does not overlap with the CCEs of the transmitted PDCCH candidate or other candidates that have AL ambiguity with the transmitted PDCCH candidate.

[0102] refer to Figure 2, the UE 115-a can receive the PDCCH 215 by reading a higher layer PDCCH configuration (e.g., a higher layer parameter such as a precoder granularity parameter) and identifying the size of the control region and the location of the common and UE-specific search space set. For example, if the higher layer PDCCH configuration provides an indication of a set of consecutive RBs, the UE 115-a can use the same precoding for all resource element groups within the set in the consecutive RBs in the CORESET. Within each search space set, the UE 115-a can identify possible PDCCH candidates, which are CCEs in which the base station 105-a may have sent the PDCCH 215. The UE 115-a can monitor the search space set for PDCCH decoding candidates, and can perform blind decoding for the PDCCH candidates, during which multiple decoding attempts are performed in the search space until the DCI is detected. The UE 115-a can then read the DCI and act accordingly, for example, performing rate matching and receiving the PDSCH 220 in a subsequent DL transmission from the base station 105-a.

[0103] By configuring UE 115-a using the above scheme, UE 115-a can improve the realization of its resources and reduce instances of unused resources. In addition, configuring UE 115-a using the above scheme (e.g., handling AL ambiguity) can improve the efficiency of the wireless communication system 200.

[0104] Figure 6 An example of a process flow 600 for supporting shared channel rate matching of a wideband DMRS with a control channel according to aspects of the present disclosure is shown. In some examples, the process flow 600 may implement aspects of wireless communication systems 100 and 200. Base station 105-b and UE 115-b may be reference Figure 1 and 2 Examples of corresponding devices described.

[0105] In the following description of process flow 600, operations between base station 105-b and UE 115-b may be sent in an order different from the exemplary order shown, or operations performed by base station 105-b and UE 115-b may be performed in a different order or at a different time. Certain operations may also be excluded from process flow 600, or other operations may be added to process flow 600.

[0106] In some examples, process flow 600 may begin with base station 105-b establishing a connection with UE 115-b (e.g., performing a cell acquisition procedure, a random access procedure, an RRC connection procedure, an RRC configuration procedure).

[0107] At 605, base station 105-b may send the DCI to UE 115-b. In some examples, base station 105-b may send the DCI to UE 115-b at a first AL within a CORESET configured for a wideband reference signal. The DCI may include a grant for a resource set for a downlink shared channel that overlaps with the CORESET. In some cases, a CORESET may include multiple disjoint segments of RBs. In this case, the DCI may be at least partially located within a first segment of the disjoint segments, and a second segment of the disjoint segments may not include the DCI.

[0108] At 610, UE 115-b may determine rate matching operation for a wideband DMRS for a downlink shared channel based on the DCI. For example, UE 115-b may determine rate matching operation for a wideband DMRS for a downlink shared channel for a portion of a resource set that overlaps with a second segment in the non-intersecting segments. In some examples, the rate matching operation may include performing rate matching around a location of a configured wideband DMRS in a portion of a resource set for the downlink shared channel that overlaps with a second segment in the non-intersecting segments. In some examples, UE 115-b may determine that a wideband DMRS is not present in a resource set that overlaps with a second segment in the non-intersecting segments.

[0109] At 615, UE 115-b may identify an AL ambiguity associated with the DCI. For example, UE 115-b may identify an AL ambiguity between DCI sent at a first AL and DCI sent at a second AL. The first AL may correspond to a first set of CCEs, and the second AL may correspond to a second set of CCEs that at least partially overlaps with the first set of CCEs.

[0110] At 620, base station 105-b may send the downlink shared channel to UE 115-b. At 625, UE 115-b may process the downlink shared channel. In some examples, UE 115-b may receive the downlink shared channel on the resource set and rate match based on a rate matching operation. For example, UE 115-b may rate match the resource set around a portion of the second CCE set that does not include the first CCE set.

[0111] Figure 7A block diagram 700 of a device 705 supporting shared channel rate matching of a wideband DMRS of a control channel according to aspects of the present disclosure is shown. The device 705 may be an example of aspects of a UE 115 as described herein. The device 705 may include a receiver 710, a UE communication manager 715, and a transmitter 720. The device 705 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0112] The receiver 710 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 shared channel rate matching of broadband DMRS for control channels, etc.). The information may be passed to other components of the device 705. The receiver 710 may be a reference Fig. 9 Examples of various aspects of the transceiver 920 are described. The receiver 710 may utilize a single antenna or a group of antennas.

[0113] The UE communication manager 715 may: receive DCI within a CORESET, the CORESET being configured with a wideband DMRS and comprising a plurality of non-intersecting segments of RBs, wherein the DCI is at least partially located within a first segment of the plurality of non-intersecting segments, and a second segment of the plurality of non-intersecting segments does not include the DCI, and wherein the DCI comprises an authorization for a resource set for a downlink shared channel overlapping with the CORESET; determine a rate matching operation for the wideband DMRS for the downlink shared channel for a portion of the resource set overlapping with the second segment of the plurality of non-intersecting segments; and receive the downlink shared channel on the resource set according to the determined rate matching operation.

[0114] The UE communication manager 715 may also receive DCI at a first AL within a CORESET configured with a wideband DMRS, wherein the DCI includes a grant for a resource set for a downlink shared channel that overlaps with the CORESET; identify AL ambiguity between the DCI sent at the first AL and the DCI sent at a second AL, wherein the first AL corresponds to a first CCE set and the second AL corresponds to a second CCE set that at least partially overlaps with the first CCE set; and receive the downlink shared channel on the resource set, wherein receiving the downlink shared channel includes rate matching the resource set around a portion of the second CCE set that does not include the first CCE set. The UE communication manager 715 may be an example of aspects of the UE communication manager 910 described herein.

[0115] The communication manager 715 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or in any combination thereof. If implemented in code executed by a processor, the functions of the UE communication manager 715 or its subcomponents may be controlled by a general purpose processor, DSP, application specific integrated circuit (ASIC), 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.

[0116] The UE communication manager 715 or its subcomponents may be physically located at various locations, including being distributed so that portions 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 UE communication manager 715 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the UE communication manager 715 or its subcomponents may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described according to the present disclosure, or a combination thereof.

[0117] Transmitter 720 can transmit signals generated by other components of device 705. In some examples, transmitter 720 can be collocated with receiver 710 in a transceiver module. For example, transmitter 720 can be a reference Fig. 9 Examples of various aspects of the transceiver 920 are described. The transmitter 720 may utilize a single antenna or a group of antennas.

[0118] Figure 8 A block diagram 800 of a device 805 supporting shared channel rate matching of a wideband DMRS of a control channel according to aspects of the present disclosure is shown. The device 805 may be an example of aspects of the device 705 or UE 115 as described herein. The device 805 may include a receiver 810, a UE communication manager 815, and a transmitter 830. The device 805 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0119] 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 shared channel rate matching of broadband DMRS for control channels, etc.). The information may be passed to other components of the device 805. The receiver 810 may be a reference Fig. 9 Examples of various aspects of the transceiver 920 are described. The receiver 810 may utilize a single antenna or a group of antennas.

[0120] The receiver 810 may receive DCI within a CORESET configured with a wideband DMRS and including a set of disjoint segments of RBs, wherein the DCI is at least partially located within a first segment in the set of disjoint segments and a second segment in the set of disjoint segments does not include the DCI, and wherein the DCI includes a grant for a resource set for a downlink shared channel that overlaps with the CORESET. In some examples, the disjoint segments of RBs may be contiguous. The receiver 810 may receive the downlink shared channel on the resource set according to the determined rate matching operation.

[0121] The receiver 810 may receive DCI at a first AL within a CORESET configured with a wideband DMRS, wherein the DCI includes a grant for a resource set for a downlink shared channel overlapping with the CORESET. The receiver 810 may receive the downlink shared channel on the resource set, wherein receiving the downlink shared channel includes rate matching the resource set around a portion of the second CCE set that does not include the first CCE set. The receiver 810 may receive an indication in the DCI to rate match the downlink shared channel around resources of the CORESET.

[0122] UE communication manager 815 may be an example of aspects of UE communication manager 715 as described herein. UE communication manager 815 may include rate matching component 820 and AL component 825. UE communication manager 815 may be an example of aspects of UE communication manager 910 as described herein.

[0123] The rate matching component 820 can determine a rate matching operation for a wideband DMRS for a downlink shared channel for a portion of a resource set that overlaps with a second segment in the set of disjoint segments. The AL component 825 can identify an AL ambiguity between a DCI sent at a first AL and a DCI sent at a second AL, wherein the first AL corresponds to a first set of CCEs and the second AL corresponds to a second set of CCEs that at least partially overlaps with the first set of CORESETs.

[0124] The transmitter 830 can transmit signals generated by other components of the device 805. In some examples, the transmitter 830 can be collocated with the receiver 810 in the transceiver module. For example, the transmitter 830 can be a reference Fig. 9 Examples of various aspects of the transceiver 920 are described. The transmitter 830 may utilize a single antenna or a group of antennas.

[0125] Fig. 9A diagram of a system 900 including a device 905 supporting shared channel rate matching of a wideband DMRS of a control channel according to various aspects of the present disclosure is shown. The device 905 may be an example of or include components of the device 705, device 805, or UE 115 described herein. The device 905 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communication manager 910, an I / O controller 915, a transceiver 920, an antenna 925, a memory 930, and a processor 940. These components may communicate electronically via one or more buses (e.g., bus 945).

[0126] The UE communication manager 910 may receive DCI within a CORESET configured with a wideband DMRS and including a plurality of non-intersecting segments of RBs, wherein the DCI is at least partially located within a first segment of the plurality of non-intersecting segments, and a second segment of the plurality of non-intersecting segments does not include the DCI, and wherein the DCI includes an authorization for a resource set for a downlink shared channel overlapping with the CORESET; determine a rate matching operation for the wideband DMRS for the downlink shared channel for a portion of the resource set overlapping with the second segment of the plurality of non-intersecting segments; and receive the downlink shared channel on the resource set according to the determined rate matching operation.

[0127] The UE communication manager 910 may also receive DCI at a first AL within a CORESET configured with a wideband DMRS, wherein the DCI includes a grant for a resource set for a downlink shared channel overlapping with the CORESET; identify AL ambiguity between the DCI sent at the first AL and the DCI sent at a second AL, wherein the first AL corresponds to a first CCE set and the second AL corresponds to a second CCE set that at least partially overlaps with the first CCE set; and receive a downlink shared channel on the resource set, wherein receiving the downlink shared channel includes rate matching the resource set around a portion of the second CCE set that does not include the first CCE set.

[0128] I / O controller 915 can manage input and output signals for device 905. I / O controller 915 can also manage peripheral devices that are not integrated into device 905. In some cases, I / O controller 915 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 915 can utilize a computer such as a 905. In some cases, the I / O controller 915 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, the I / O controller 915 may be implemented as part of a processor. In some cases, a user may interact with the device 905 via the I / O controller 915 or via hardware components controlled by the I / O controller 915.

[0129] As described above, the transceiver 920 can communicate bidirectionally via one or more antennas, wired or wireless links. For example, the transceiver 920 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 920 can also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and demodulate the packets received from the antenna. In some cases, the device 905 can include a single antenna 925. However, in some cases, the device 905 can have more than one antenna 925, which can be capable of sending or receiving multiple wireless transmissions simultaneously.

[0130] The memory 930 may include RAM and ROM. The memory 930 may store computer-readable, computer-executable code 935 including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, the memory 930 may include, among other things, a BIOS that may control basic hardware or software operations, such as interacting with peripheral components or devices.

[0131] The processor 940 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 940 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 940. The processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 930) to cause the device 905 to perform various functions (e.g., functions or tasks that support shared channel rate matching of a broadband DMRS of a control channel).

[0132] The code 935 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 935 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 935 may not be directly executable by the processor 940, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0133] Fig.10A flow chart illustrating a method 1000 for supporting shared channel rate matching of a wideband DMRS with a control channel according to aspects of the present disclosure is shown. The operations of the method 1000 may be implemented by a UE 115 or a component thereof as described herein. For example, the operations of the method 1000 may be implemented by a UE 115 or a component thereof as described herein. Figures 7 to 9 The UE communication manager described herein may be used to perform the functions described below. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0134] At 1005, the UE may receive DCI within a CORESET configured with a wideband DMRS and including a set of disjoint segments of RBs, wherein the DCI is at least partially within a first segment in the set of disjoint segments, and a second segment in the set of disjoint segments does not include the DCI, and wherein the DCI includes a grant for a resource set for a downlink shared channel that overlaps with the CORESET. Operation 1005 may be performed according to methods described herein. In some examples, the DCI may be received by a UE as described in reference to Figures 7 to 9 The receiver is described to perform aspects of operation 1005.

[0135] At 1010, the UE may determine a rate matching operation for a wideband DMRS for a downlink shared channel for a portion of a resource set that overlaps with a second segment in the set of disjoint segments. Operation 1010 may be performed according to methods described herein. In some examples, the UE may be configured as described in reference to Figures 7 to 9 The described rate matching components are used to perform aspects of operation 1010.

[0136] At 1015, the UE may receive a downlink shared channel on the resource set according to the determined rate matching operation. Operation 1015 may be performed according to the methods described herein. In some examples, the method may be performed as described in reference to Figures 7 to 9 The receiver is described to perform aspects of operation 1015.

[0137] Fig.11 A flow chart illustrating a method 1100 for supporting shared channel rate matching of a wideband DMRS with a control channel according to aspects of the present disclosure is shown. The operations of the method 1100 may be implemented by a UE 115 or a component thereof as described herein. For example, the operations of the method 1100 may be implemented by a UE 115 or a component thereof as described herein. Figures 7 to 9 The UE communication manager described herein may be used to perform the functions described below. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0138] At 1105, the UE may receive DCI in a first AL within a CORESET configured with a wideband DMRS, wherein the DCI includes a grant for a resource set for a downlink shared channel overlapping with the CORESET. Operation 1105 may be performed according to the methods described herein. In some examples, the UE may receive DCI in a first AL within a CORESET configured with a wideband DMRS, wherein the DCI includes a grant for a resource set for a downlink shared channel overlapping with the CORESET. Figures 7 to 9 The receiver is described to perform aspects of operation 1105.

[0139] At 1110, the UE may identify AL ambiguity between DCI sent at a first AL and DCI sent at a second AL, wherein the first AL corresponds to a first set of CCEs and the second AL corresponds to a second set of CCEs that at least partially overlaps the first set of CCEs. Operation 1110 may be performed according to methods described herein. In some examples, the UE may include a method such as that described in reference to Figures 7 to 9 AL components are described to perform various aspects of operation 1110.

[0140] At 1115, the UE may receive a downlink shared channel on the resource set, wherein receiving the downlink shared channel includes rate matching the resource set around a portion of the second CCE set that does not include the first CCE set. Operation 1115 may be performed according to methods described herein. In some examples, the UE may receive a downlink shared channel on the resource set, wherein receiving the downlink shared channel includes rate matching the resource set around a portion of the second CCE set that does not include the first CCE set. Figures 7 to 9 The receiver is described to perform aspects of operation 1115.

[0141] It should be noted that the methods described above describe possible embodiments, and that operations and steps may be rearranged or otherwise modified, and other embodiments are possible. Furthermore, aspects from two or more methods may be combined.

[0142] Embodiment 1: A method for wireless communication, comprising: receiving DCI within a CORESET, the CORESET being configured with a wideband DMRS and comprising a plurality of non-intersecting segments of RBs, wherein the DCI is at least partially located within a first segment of the plurality of non-intersecting segments, and a second segment of the plurality of non-intersecting segments does not include the DCI, and wherein the DCI comprises an authorization for a resource set for a downlink shared channel overlapping with the CORESET; determining a rate matching operation of the downlink shared channel for the wideband DMRS for a portion of the resource set overlapping with the second segment of the plurality of non-intersecting segments; and receiving the downlink shared channel on the resource set according to the determined rate matching operation.

[0143] Embodiment 2: A method according to embodiment 1, wherein the rate matching operation includes performing rate matching around the location of the configured wideband DMRS in a portion of the resource set for the downlink shared channel that overlaps with the second segment of the multiple non-overlapping segments.

[0144] Embodiment 3: A method according to any one of Embodiments 1 or 2, wherein the rate matching operation includes processing the configured wideband DMRS position in the portion of the resource set for the downlink shared channel that overlaps with the second fragment of the multiple non-overlapping fragments as a data resource of the downlink shared channel.

[0145] Embodiment 4: The method according to any one of embodiments 1 to 3 further comprises receiving in the DCI an indication to rate match the downlink shared channel around the resources of the CORESET.

[0146] Embodiment 5: The method according to any one of Embodiments 1 to 4, wherein the RBs in each non-intersecting segment of the plurality of non-intersecting segments are continuous.

[0147] Embodiment 6: A device for wireless communication, comprising: a processor; a memory that is in electronic communication with the processor; and instructions that are stored in the memory and can be executed by the processor to cause the device to perform a method according to any one of Embodiments 1 to 5.

[0148] Embodiment 7: An apparatus comprising at least one component for performing the method according to any one of embodiments 1 to 5.

[0149] Embodiment 8: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to any one of Embodiments 1 to 5.

[0150] Embodiment 9: A method for wireless communication, comprising: receiving DCI at a first AL within a CORESET configured with a wideband DMRS, wherein the DCI includes an authorization for a resource set for a downlink shared channel overlapping with the CORESET; identifying AL ambiguity between the DCI sent at the first AL and the DCI sent at a second AL, wherein the first AL corresponds to a first CCE set and the second AL corresponds to a second CCE set that at least partially overlaps with the first CCE set; and receiving the downlink shared channel on the resource set, wherein the receiving the downlink shared channel includes rate matching the resource set around a portion of the second CCE set that does not include the first CCE set.

[0151] Embodiment 10: A method according to embodiment 9, wherein the CORESET includes multiple non-intersecting fragments of RB, and wherein the first CCE set is located within a first subset of the multiple non-intersecting fragments, and wherein at least a portion of the second CCE set that does not include the portion of the first CCE set is located within a second subset of the multiple non-intersecting fragments.

[0152] Embodiment 11: The method according to any one of Embodiments 9 or 10, wherein the RBs in each non-intersecting segment of the plurality of non-intersecting segments are continuous.

[0153] Embodiment 12: A method according to any one of embodiments 9 to 11, wherein the receiving the downlink shared channel includes rate matching the resource set around the location of the configured wideband DMRS in the second subset of the multiple non-overlapping segments.

[0154] Embodiment 13: A method according to any one of Embodiments 9 to 12, wherein at least one of the multiple non-intersecting fragments does not include the first CCE set and the second CCE set, and wherein the receiving of the downlink shared channel includes processing the position of the configured wideband DMRS in the overlapping portion of the at least one of the multiple non-intersecting fragments in the resource set for the downlink shared channel as a data resource of the downlink shared channel.

[0155] Embodiment 14: A method according to any one of Embodiments 9 to 13, wherein at least one of the multiple non-intersecting fragments does not include the first CCE set and the second CCE set, and wherein the receiving of the downlink shared channel includes performing rate matching around the location of the configured wideband DMRS in the portion of the resource set for the downlink shared channel that overlaps with the at least one of the multiple non-intersecting fragments.

[0156] Embodiment 15: A device for wireless communication, comprising: a processor; a memory that is in electronic communication with the processor; and instructions that are stored in the memory and can be executed by the processor to cause the device to perform a method according to any one of Embodiments 9 to 14.

[0157] Embodiment 16: An apparatus comprising at least one component for performing the method according to any one of embodiments 9 to 14.

[0158] Embodiment 17: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to any one of Embodiments 9 to 14.

[0159] The technology described herein can be used in 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 Rate 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).

[0160] 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 parts of Universal Mobile Telecommunications System (UMTS). LTE, LTE-A and LTE-A Pro are UMTS versions using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR and GSM are described in documents of 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 above can 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 many descriptions, the techniques described herein may be applicable beyond LTE, LTE-A, LTE-A Pro, or NR applications.

[0161] A macro cell typically covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access to a UE 115 that subscribes to a service from a network provider. A small cell may be associated with a base station 105 with lower power than a macro cell, and the small cell may operate in a frequency band that is the same or different (e.g., licensed, unlicensed, etc.) from the macro cell. According to various examples, a small cell may include a pico cell, a femto cell, and a micro cell. A pico cell, for example, may cover a small geographic area and may allow unrestricted access to a UE 115 that subscribes to a service from a network provider. A femto cell may also cover a small geographic area (e.g., a home) and may provide restricted access to a UE 115 associated with a femto cell (e.g., a UE 115 in a closed subscriber group (CSG), a UE 115 of a home user, 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 (eg, two, three, four, etc.) cells and may also support communication using one or more component carriers.

[0162] The wireless communication system 100 or the various systems described herein may support synchronous or asynchronous operation. For synchronous operation, the base stations 105 may have similar frame timing, and transmissions from different base stations 105 may be approximately aligned in time. For asynchronous operation, the base stations 105 may have different frame timing, and transmissions from different base stations 105 may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operation.

[0163] 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 mentioned throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0164] The various illustrative blocks and modules described in conjunction 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 (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, microcontroller, or state machine. The 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).

[0165] 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 sent via a computer-readable medium as one or more instructions or codes. Other examples and implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or any combination of these. Features that implement the functions may also be physically located in a variety of locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0166] Computer-readable media include both non-transitory computer storage media and communication media (including any media that facilitates 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 or special computer. For example and without limitation, non-transitory computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage devices, magnetic disk storage devices or other magnetic storage devices, or may be used to carry or store the required program code in the form of instructions or data structures and any other medium that can be accessed by a general or special computer, or a general or special processor. In addition, any connection is appropriately referred to as a computer-readable medium. For example, if software is sent from a website, server or other remote source using coaxial cable, optical cable, twisted pair, digital subscriber line (DSL) or wireless technologies such as infrared, radio and microwave, coaxial cable, optical fiber cable, twisted pair, DSL or wireless technologies such as infrared, radio and microwave are included in the definition of the medium. Disk and disc, as used herein, includes CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, where disks usually reproduce data magnetically, while discs reproduce data optically with the aid of lasers. Combinations of the above are also included within the scope of computer-readable media.

[0167] Moreover, as used herein (including in the claims), "or" as used in a list of items (e.g., a list of items beginning with a phrase such as "at least one of" or "one or more") indicates an inclusive list, so that, for example, 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). Moreover, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of 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."

[0168] 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 distinguishes the similar components. If only the first numerical reference label is used in the specification, the description applies to any of the similar components having the same first reference label, regardless of the second or other subsequent reference labels.

[0169] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do 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, paradigm, or illustration," rather than "preferred" or "superior to other examples." In order to provide an understanding of the described techniques, the detailed description includes specific details. However, these techniques may be practiced without these specific details. In some examples, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

[0170] The description herein is provided 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 should be given the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication, comprising: Receiving downlink control information DCI at a first aggregation level AL in a control resource set CORESET configured with a broadband demodulation reference signal DMRS, wherein the DCI includes a grant for a resource set for a downlink shared channel overlapping with the CORESET; identifying AL ambiguity between DCI sent at the first AL and DCI sent at a second AL, wherein the first AL corresponds to a first set of control channel elements (CCEs) and the second AL corresponds to a second set of CCEs that at least partially overlaps with the first set of CCEs; and The downlink shared channel is received on the set of resources, wherein the receiving the downlink shared channel comprises rate matching the set of resources around a portion of the second set of CCEs that does not include the first set of CCEs.

2. The method according to claim 1, wherein: The CORESET comprises a plurality of non-intersecting fragments of resource blocks RB, and wherein the first CCE set is located within a first subset of the plurality of non-intersecting fragments, and wherein at least a portion of the second CCE set excluding the portion of the first CCE set is located within a second subset of the plurality of non-intersecting fragments.

3. The method according to claim 1, wherein: The RBs in each of the plurality of disjoint segments are continuous.

4. The method according to claim 2, wherein: The receiving the downlink shared channel includes rate matching the resource set around a location of the configured wideband DMRS in the second subset of the plurality of disjoint segments.

5. The method according to claim 2, wherein: At least one of the multiple non-intersecting segments does not include the first CCE set and the second CCE set, and wherein the receiving of the downlink shared channel includes processing the position of the configured wideband DMRS in the portion of the resource set for the downlink shared channel that overlaps with the at least one of the multiple non-intersecting segments as a data resource of the downlink shared channel.

6. The method according to claim 2, wherein: At least one of the multiple non-intersecting segments does not include the first CCE set and the second CCE set, and wherein the receiving the downlink shared channel includes performing rate matching around the location of the configured wideband DMRS in the portion of the resource set for the downlink shared channel that overlaps with the at least one of the multiple non-intersecting segments.

7. An apparatus for wireless communication, comprising: processor, a memory in electronic communication with the processor; as well as instructions stored in the memory and executable by the processor to cause the device to: Receiving downlink control information DCI at a first aggregation level AL in a control resource set CORESET configured with a broadband demodulation reference signal DMRS, wherein the DCI includes a grant for a resource set for a downlink shared channel overlapping with the CORESET; identifying AL ambiguity between DCI sent at the first AL and DCI sent at a second AL, wherein the first AL corresponds to a first set of control channel elements (CCEs) and the second AL corresponds to a second set of CCEs that at least partially overlaps with the first set of CCEs; and The downlink shared channel is received on the set of resources, wherein the receiving the downlink shared channel comprises rate matching the set of resources around a portion of the second set of CCEs that does not include the first set of CCEs.

8. The device according to claim 7, wherein: The CORESET comprises a plurality of non-intersecting fragments of resource blocks RB, and wherein the first CCE set is located within a first subset of the plurality of non-intersecting fragments, and wherein at least a portion of the second CCE set that does not include a portion of the first CCE set is located within a second subset of the plurality of non-intersecting fragments.

9. An apparatus for wireless communication, comprising: means for receiving downlink control information DCI at a first aggregation level AL within a control resource set CORESET configured with a broadband demodulation reference signal DMRS, wherein the DCI comprises a grant for a resource set for a downlink shared channel overlapping with the CORESET; means for identifying AL ambiguity between DCI transmitted at the first AL and DCI transmitted at a second AL, wherein the first AL corresponds to a first set of control channel elements (CCEs) and the second AL corresponds to a second set of CCEs that at least partially overlaps with the first set of CCEs; and means for receiving the downlink shared channel on the set of resources, wherein the receiving the downlink shared channel comprises rate matching the set of resources around a portion of the second set of CCEs that excludes the first set of CCEs.

10. A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to: Downlink control information DCI is received at a first aggregation level AL in a control resource set CORESET configured with a broadband demodulation reference signal DMRS, wherein: The DCI includes a grant for a resource set for a downlink shared channel overlapping with the CORESET; identifying AL ambiguity between DCI sent at the first AL and DCI sent at a second AL, wherein the first AL corresponds to a first set of control channel elements (CCEs) and the second AL corresponds to a second set of CCEs that at least partially overlaps with the first set of CCEs; and The downlink shared channel is received on the set of resources, wherein the receiving the downlink shared channel comprises rate matching the set of resources around a portion of the second set of CCEs that does not include the first set of CCEs.

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