Common control channel

Abstract

Various aspects of the disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) can receive common downlink control information (DCI) included in a physical downlink control channel (PDCCH) candidate, where the PDCCH candidate has a first size associated with a first aggregation level, where the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate and is detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, and where the portion of the PDCCH candidate has a second size associated with the second aggregation level. The UE can communicate based at least in part on the common DCI. Numerous other aspects are described.

Description

Technical Field

[0001] Various aspects of this disclosure generally relate to wireless communications and technologies and apparatus for common control channels. Background Technology

[0002] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard issued by the 3rd Generation Partnership Project (3GPP).

[0003] A wireless network may include multiple base stations (BSs) that can support communication from multiple user equipment (UEs). UEs can communicate with the BS via downlink and uplink. A downlink (or forward link) refers to the communication link from the BS to the UE, and an uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, Access Point (AP), Radio Head, Transmitter Receiver Point (TRP), New Radio (NR) BS, 5G Node B, etc. The BS can send control information to various UEs to configure or control UE operations. In some cases, common control information may be sent to UEs associated with different capabilities, such as a RedCap UE and another UE. In other cases, common control information may be sent to UEs associated with different releases of the 3GPP standard, such as a RedCap UE with a higher release and other UEs with a previous release.

[0004] The aforementioned multiple access technologies have been adopted by various telecommunications standards to provide a universal protocol enabling different user equipment to communicate across cities, countries, regions, and even globally. NR (also known as 5G) is a set of enhancements to the LTE mobile standard issued by 3GPP. NR aims to better integrate with other open standards by improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and using Orthogonal Frequency Division Multiplexing (OFDM) with a Cyclic Prefix (CP) on the downlink (DL) and CP-OFDM and / or SC-FDM (e.g., also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technologies and carrier aggregation to better support mobile broadband internet access. As the demand for mobile broadband access continues to increase, further improvements to LTE, NR, and other radio access technologies remain useful. Summary of the Invention

[0005] The techniques described herein provide improved resource utilization, robustness of control signaling, and compatibility with common control signaling for UEs with different capabilities. For example, different UEs may have different capabilities for monitoring control signaling. These different capabilities may be related to the amount of resources used to transmit control signaling (e.g., the aggregation level associated with the control signaling). Some of the techniques described herein provide common control signaling that can be interpreted by UEs with different aggregation levels, providing compatibility between UEs using a first aggregation level and UEs using a second aggregation level. Since common control signaling can be decoded at both the first and second aggregation levels, it can be transmitted once for both UEs, improving resource utilization and reducing processor and memory usage. Furthermore, the use of a larger aggregation level improves coverage for certain types of UEs, while other types of UEs (that cannot or do not use a larger aggregation level) can successfully receive control signaling using a smaller aggregation level, providing compatibility (e.g., backward compatibility) between these different types of UEs.

[0006] In some aspects, a wireless communication method performed by a user equipment (UE) includes receiving common downlink control information (DCI) included in a physical downlink control channel (PDCCH) candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, wherein a portion of the PDCCH candidate has a second size associated with the second aggregation level; and communicating at least partially based on the common DCI.

[0007] In some aspects, a wireless communication method performed by a base station includes mapping a common DCI to a PDCCH associated with a PDCCH candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level; and transmitting the common DCI.

[0008] In some aspects, a UE for wireless communication includes a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receive a common DCI included in a PDCCH candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, wherein a portion of the PDCCH candidate has a second size associated with the second aggregation level; and to communicate at least in part based on the common DCI.

[0009] In some aspects, a base station for wireless communication includes a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: map a common DCI to a PDCCH associated with a PDCCH candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level; and transmit the common DCI.

[0010] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: receive a common DCI included in a PDCCH candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level; and communicate at least in part based on the common DCI.

[0011] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a base station, cause the base station to: map a common DCI to a PDCCH associated with a PDCCH candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level; and transmit the common DCI.

[0012] In some aspects, an apparatus for wireless communication includes: a unit for receiving a common DCI included in a PDCCH candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate and at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, and wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level; and a unit for communicating at least partially based on the common DCI.

[0013] In some aspects, an apparatus for wireless communication includes units for mapping a common DCI to a PDCCH associated with a PDCCH candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate and at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, and wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level; and units for transmitting the common DCI.

[0014] The aspects typically include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication equipment and / or processing system, as described herein with reference to the accompanying drawings.

[0015] To better understand the following detailed description, the features and technical advantages of embodiments according to this disclosure have been outlined rather extensively above. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as the basis for modifications or the design of other structures to achieve the same purpose of this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The features of the concepts disclosed herein, their organization and operation, and the associated advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each drawing is provided for illustrative and descriptive purposes and not as a limitation of the definitions in the claims. Attached Figure Description

[0016] To gain a more detailed understanding of the features described above, reference can be made to several aspects that have been briefly summarized above, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings show only certain typical aspects of this disclosure and should therefore not be considered as limiting its scope, as the specification may acknowledge other equally valid aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0017] Figure 1 This is a diagram illustrating an example of a wireless network.

[0018] Figure 2 This is a diagram illustrating an example of a base station communicating with a UE in a wireless network.

[0019] Figure 3 This is a diagram illustrating an example resource structure for wireless communication according to various aspects of this disclosure.

[0020] Figure 4 This is a diagram illustrating examples of signaling associated with providing a Physical Downlink Control Channel (PDCCH) detectable at multiple aggregation levels, according to various aspects of this disclosure.

[0021] Figure 5 and Figure 6 This is a diagram illustrating examples of mapping downlink control information (DCI) to PDCCH and portions of PDCCH according to various aspects of this disclosure.

[0022] Figure 7 This is a diagram illustrating an example of determining the resources of the Physical Downlink Shared Channel (PDSCH) scheduled by the DCI according to various aspects of this disclosure.

[0023] Figure 8 This is a diagram illustrating an example of determining the resources for a PDSCH scheduled by DCI according to various aspects of this disclosure.

[0024] Figure 9 This is a diagram illustrating, for example, an example process performed by a UE according to various aspects of this disclosure.

[0025] Figure 10 This is a diagram illustrating, for example, an example process performed by a base station according to various aspects of this disclosure.

[0026] Figure 11 This is a block diagram of an example device for wireless communication according to various aspects of this disclosure.

[0027] Figure 12 This is a block diagram of an example device for wireless communication according to various aspects of this disclosure. Detailed Implementation

[0028] The techniques described herein provide improved resource utilization, robustness of control signaling, and compatibility with common control signaling for UEs with different capabilities. For example, different UEs may have different capabilities for monitoring control signaling. These different capabilities may be related to the amount of resources used to transmit control signaling (e.g., the aggregation level associated with the control signaling). Some of the techniques described herein provide common control signaling that can be interpreted by the UE at different aggregation levels, providing compatibility between UEs using a first aggregation level and UEs using a second aggregation level. Since common control signaling can be decoded at both the first and second aggregation levels, it can be transmitted for both UEs at a single common control signaling level, improving resource utilization and reducing processor and memory usage. Furthermore, the use of a larger aggregation level improves coverage for certain types of UEs, while other types of UEs (that cannot or do not use a larger aggregation level) can successfully receive control signaling using a smaller aggregation level, providing compatibility (e.g., backward compatibility) between these different types of UEs.

[0029] Various aspects of this disclosure will be described more fully below with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and should not be construed as limited to any particular structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully communicate the scope of this disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will understand that the scope of this disclosure is intended to cover any aspect of this disclosure, whether implemented independently of or in combination with any other aspect of this disclosure. For example, any number of aspects set forth herein may be used to implement an apparatus or practice. Furthermore, the scope of this disclosure is intended to cover an apparatus or method practiced using structures, functions, or structures and functions other than or different from the aspects of this disclosure set forth herein. It should be understood that any aspect of the disclosure herein may be embodied by one or more elements of the claims.

[0030] Several aspects of a telecommunications system will now be described with reference to various devices and technologies. These devices and technologies will be described in detail below and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively, “elements”). These elements can be implemented using hardware, software, or a combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the entire system.

[0031] Figure 1 This is a diagram illustrating an example of a wireless network 100 according to various aspects of this disclosure. The wireless network 100 may be or may include elements of a 5G (NR) network and / or an LTE network, etc. The wireless network 100 may include multiple base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, Node B, gNB, 5G Node B (NB), access point, Transmit-Receive Point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of ​​a BS and / or BS subsystem serving that coverage area, depending on the context in which the term is used.

[0032] A BS can provide communication coverage for macrocells, picocells, femtocells, and / or another type of cell. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access for UEs with service subscriptions. A picocell can cover a relatively small geographic area and allow unrestricted access for UEs with service subscriptions. A femtocell can cover a relatively small geographic area (e.g., a home) and allow restricted access for UEs associated with that femtocell (e.g., UEs in a Closed User Group (CSG)). A BS used for macrocells may be referred to as a macro BS. A BS used for picocells may be referred to as a pico BS. A BS used for femtocells may be referred to as a femtocell BS or a home BS. Figure 1 In the example shown, BS 110a can be a macro BS for macro cell 102a, BS 110b can be a pico BS for pico cell 102b, and BS 110c can be a femto BS for femto cell 102c. A BS can support one or more (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “Node B,” “5G NB,” and “cell” are used interchangeably herein.

[0033] The wireless network 100 may also include relay stations. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and transmit the data transmissions to a downstream station (e.g., a UE or a BS). A relay station can also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown, relay BS 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay BS can also be referred to as a relay station, relay base station, relay, etc.

[0034] Network controller 130 can be coupled to a group of base stations (BSs) and can provide coordination and control for these BSs. Network controller 130 can communicate with the BSs via backhaul. The BSs can also communicate with each other directly or indirectly via wireless or wired backhaul.

[0035] UEs 120 (e.g., 120a, 120b, 120c) may be distributed throughout the wireless network 100, and each UE may be fixed or mobile. A UE may also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. A UE may be a cellular phone (e.g., a smartphone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or apparatus, a biosensor / device, a wearable device (smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device or a satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a GPS device, or any other suitable device configured to communicate via wireless or wired media. Examples of UEs include enhanced mobile broadband (eMBB) UEs, ultra-reliable low-latency communications (URLLC) UEs, and vehicle-to-everything (V2X) UEs.

[0036] Some UEs can be considered Reduced Capability (RedCap) UEs, also known as NR Light UEs. For example, RedCap UEs can include wearable devices, robots, drones, remote devices, sensors, meters, monitors, location tags, devices in Industrial Wireless Sensor Networks (IWSNs), surveillance cameras, etc. Typically, RedCap UEs can be associated with reduced capabilities compared to baseline UEs such as eMBB UEs. For example, RedCap UEs may have a reduced number of antennas, a reduced antenna size, smaller operating bandwidth, etc. Therefore, the link budget for some uplink and downlink channels may be reduced, meaning that coverage compensation (e.g., by using a larger aggregation level for PDCCH transmissions) is attractive for deployments involving RedCap UEs.

[0037] Typically, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific RAT and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, air interface, etc. A frequency can also be referred to as a carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0038] As mentioned above, providing Figure 1 As an example. Other examples may be similar. Figure 1 The descriptions differ from those in the text.

[0039] Figure 2This is a diagram illustrating an example 200 of a base station 110 communicating with a UE 120 in a wireless network 100 according to various aspects of this disclosure. The base station 110 may be equipped with T antennas 234a to 234t, and the UE 120 may be equipped with R antennas 252a to 252r, where generally T ≥ 1 and R ≥ 1. The base station 110 and the UE 120 may communicate with each other using signals transmitted and received via antennas 234 and 254 according to various radio access technologies. (Related information...) Figure 2 For a more detailed description of the components shown, please refer to [link / reference]. Figure 11 (For UE 120) and Figure 12 (Explanation for base station 110)

[0040] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include one or more devices, such as those in a core network. Network controller 130 may communicate with base station 110 via communication unit 294.

[0041] Although Figure 2 The blocks are shown as different components, but the functions described above with respect to the blocks can be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 can be executed by controller / processor 280 or executed under the control of controller / processor 280.

[0042] As mentioned above, providing Figure 2 As an example. Other examples may be similar. Figure 2 The descriptions are different.

[0043] Figure 3 This is a diagram illustrating an example resource structure 300 for wireless communication according to various aspects of this disclosure. Resource structure 300 illustrates examples of various resource groups described herein. As shown, resource structure 300 may include one or more time slots 305. In some aspects, time slots 305 may be included in subframes (not shown). For example, a subframe may include two time slots per subframe, or may include different numbers of time slots in a subframe (e.g., 1 time slot, 4 time slots, 8 time slots, 16 time slots, 32 time slots, etc.). In some aspects, different types of transmission time intervals (TTIs) may be used in addition to subframes and / or time slots. Time slot 305 may include multiple OFDM symbols 310, for example, 14 symbols per time slot.

[0044] The potential control area of ​​time slot 305 can be referred to as a control resource set (CORESET) 315. A CORESET is a resource area configured for PDCCH monitoring. CORESET 315 can be constructed to support efficient resource utilization, for example, by flexibly configuring or reconfiguring the resources of the CORESET for one or more PDCCHs. In some aspects, CORESET 315 may occupy the first symbol 310 of time slot 305, the first two symbols 310 of time slot 305, or the first three symbols 310 of time slot 305. Therefore, CORESET 315 may include multiple resource blocks (RBs) in the frequency domain and one, two, or three symbols 310 in the time domain. In 5G / NR, the number of resources included in CORESET 315 can be flexibly configured, for example, by using Radio Resource Control (RRC) signaling to indicate the frequency domain area (e.g., the number of resource blocks) and / or time domain area (e.g., the number of symbols) of CORESET 315.

[0045] As shown in the figure, symbol 310, including CORESET 315, may include one or more Control Channel Elements (CCEs) 320, for example shown as two CCEs 320, spanning a portion of the system bandwidth. CCEs 320 may include downlink control information (DCI) for providing control information for wireless communication. The BS may transmit DCI during multiple CCEs 320 (as shown in the figure), where the number of CCEs 320 used for DCI transmission represents the aggregation level (AL) of the BS for DCI transmission. Figure 3 In this example, aggregation level 2 corresponds to two CCE 320s in slot 305. Different aggregation levels can be used in some aspects, such as 1, 2, 4, 8, 12, 16, 24, etc.

[0046] Each CCE 320 may include a fixed number of Resource Element Groups (REGs) 325, shown as 6 REGs 325, or may include a variable number of REGs 325. In some aspects, the number of REGs 325 included in the CCE 320 may be specified by the REG binding size. A REG 325 may include a Physical Resource Block (PRB), which may include 12 Resource Elements (REs) 330 within a symbol 310. Resource Elements 330 may occupy one subcarrier in the frequency domain and one OFDM symbol in the time domain. A CORESET 315 may be configured by a bitmap indicating frequency domain resources (e.g., each bit of the bitmap may represent multiple consecutive PRBs, such as 6 consecutive PRBs). The REGs 325 of a CCE 320 including 6 REGs 325 may be arranged in a 1x6 pattern (indicating 1 instance in the time domain and 6 instances in the frequency domain), a 2x3 pattern, or a 3x2 pattern, among other examples. The time-frequency mode used for CCE 320 can depend on the number of symbols configured for the corresponding CORESET 315. REG 325 within CCE 320 can be indexed in a time-first manner.

[0047] The search space can include all possible locations where the PDCCH might be located (e.g., in time and / or frequency). CORESET315 can include one or more search spaces, such as a UE-specific search space, a group-common search space, and / or a common search space. The search space can indicate a set of CCE locations where the UE can detect PDCCHs that might be used to transmit control information to the UE. Possible locations of the PDCCH can depend on whether the PDCCH is a UE-specific PDCCH (e.g., for a single UE) or a group-common PDCCH (e.g., for multiple UEs), the aggregation level being used, etc. Possible locations of the PDCCH (e.g., in time and / or frequency) can be referred to as PDCCH candidates. In other words, PDCCH candidates on which PDCCHs are transmitted can include the PDCCH (and therefore can include DCIs transmitted via the PDCCH).

[0048] The set of all PDCCH candidates at an aggregation level can be called a search space. For example, the set of all PDCCH candidates for a specific UE can be called a UE-specific search space. Similarly, the set of all PDCCH candidates across all UEs can be called a common search space. The set of all PDCCH candidates for a specific group of UEs can be called a group common search space. One or more search spaces across an aggregation level can be called a set of search spaces (SS).

[0049] As described above, a PDCCH candidate is a potential PDCCH to be monitored within CORESET 315. A PDCCH candidate can be defined by a starting CCE index and the number of CCEs 320 with consecutive CCE indices. For example, a PDCCH candidate with a size defined by aggregation level 8 can include eight CCEs 320 with CCE indices {0, 1, ..., 7} in a CORESET 315 with 12 CCEs 320. As another example, two PDCCH candidates with a size defined by aggregation level 4 can include four CCEs with CCE indices {0, 1, 2, 3} and {8, 9, 10, 11} in a CORESET 315 with 12 CCEs 320. It should be noted that the above are merely examples, and PDCCH candidates can be arranged in other ways within CORESET 315. The UE can receive a PDCCH at least in part based on the aggregation level associated with the PDCCH. For example, a UE can detect a DCI transmitted via PDCCH at a given aggregation level by decoding a PDCCH candidate with a size associated with the aggregation level. Since the UE does not know whether the PDCCH candidate will include the transmitted PDCCH, the attempt to decode the PDCCH candidate is often referred to as blind decoding.

[0050] The initial CCE 320 for PDCCH candidates can be based at least in part on the aggregation level, the total number of PDCCH candidates, and / or other information. For example, for each aggregation level (AL)L configured for the search space s associated with CORESET p. AL The total number can be configured. PDCCH candidates. The revelatory index can be in the form of The formula is determined, where N CCE,p Y is the total number of CCEs in CORESET p. Y can be at least partially based on the slot index and cell-specific radio network temporary identifier (C-RNTI) value of the USS (UE-specific search space) or the randomization number of the hash function used for random resource selection, or it can be 0 (zero) for the common search space.

[0051] CORESET 315 can be interleaved or non-interleaved. An interleaved CORESET 315 can have a CCE-to-REG mapping such that adjacent CCEs are mapped to scattered REG bindings in the frequency domain (e.g., adjacent CCEs are not mapped to consecutive REG bindings in CORESET 315). REG bindings can be interleaved units used for CCE-to-REG mapping. The binding size of REG bindings can be 2, 3, or 6, etc. A non-interleaved CORESET 315 can have a CCE-to-REG mapping such that all CCEs are mapped to consecutive REG bindings in CORESET 315 (e.g., in the frequency domain). For CORESET#0 during initial access, CCE-to-REG interleaving can be assumed. CORESET#0 can carry a PDCCH for scheduling system information blocks (e.g., System Information Block (SIB) 1 (SIB1)).

[0052] REG 325 may include a demodulation reference signal (DMRS). The DMRS is a reference signal used by the receiver of the channel to demodulate the channel. The DMRS can be transmitted on multiple REs of REG 325 and can be frequency-division multiplexed (FDMed) with REs carrying DCI. As an example, RE indices 1, 5, and 9 within REG 325 can be DMRS REs, while the other REs in REG 325 can be DCI REs.

[0053] Generally, a larger AL (including more CCE 320s) can provide better coverage than a smaller AL (containing fewer CCE 320s). Therefore, a larger AL can be beneficial for enhancing coverage. As a specific example, an AL of 24 (e.g., 24 CCE 320s) can be used to enhance PDCCH coverage relative to an AL of 16. As another example, for a UE that cannot support an AL of 16 (but can support an AL of 12), an AL of 12 can be used to enhance coverage relative to a PDCCH with an AL of 8. In some cases, the PDCCH can carry common control information, such as a common DCI pointing to multiple UEs. Examples of use cases for common DCI include system information, paging messages, and initial access messages. A PDCCH carrying a common DCI may be referred to herein as a common PDCCH or a broadcast PDCCH.

[0054] Sending the common PDCCH only at a larger AL (e.g., 12 or 24) may result in some UEs being unable to detect it due to the larger AL, while sending it only at a smaller AL may provide insufficient coverage for some UEs. This can be particularly problematic for combinations of RedCap UEs and baseline UEs, as RedCap UEs may struggle to decode the PDCCH at lower ALs, while the baseline UEs may not support higher ALs. Sending the common PDCCH multiple times at different ALs can be inefficient and may consume significant computational and communication resources. Some of the techniques and apparatus described herein provide for the transmission of the common PDCCH, which can be successfully decoded by the UE using multiple different ALs, as described elsewhere in this document. Therefore, sharing the common PDCCH between RedCap UEs and baseline UEs (e.g., eMBB, URLLC, and V2X UEs) is enabled.

[0055] As mentioned above, providing Figure 3 As an example. Other examples may be similar. Figure 3 The descriptions differ from those in the text.

[0056] Figure 4 This is a diagram illustrating example 400 of signaling associated with providing PDCCHs detectable at multiple aggregation levels according to various aspects of this disclosure. As shown, example 400 includes a BS 110 (hereinafter referred to as BS), a first UE 120-1 (hereinafter referred to as the first UE), and a second UE 120-2 (hereinafter referred to as the second UE). The first UE may be associated with a first aggregation level, meaning that the first UE is capable of and / or configured to detect PDCCHs at the first aggregation level. Similarly, the second UE may be associated with a second aggregation level. In some aspects, the second aggregation level may be smaller than the first aggregation level (e.g., each PDCCH may include fewer CCEs than the first aggregation level). As a first example, the first aggregation level may have a first size of 24 CCEs, and the second aggregation level may have a second size of 16 CCEs. As a second example, the first aggregation level may have a first size of 12 CCEs, and the second aggregation level may have a second size of 8 CCEs. As a third example, the first aggregation level may have a first size of 11 CCEs, and the second aggregation level may have a second size of 8 CCEs.

[0057] As shown by reference numeral 410 in the attached figure, the BS can map the common DCI to a PDCCH candidate. The common DCI can point to multiple UEs. In some aspects, the common DCI can be associated with a broadcast PDCCH or a multicast PDCCH, for example, for system information, paging messages, initial access information, etc. As shown, the BS can map the common DCI to a PDCCH candidate of a first size associated with a first AL, and can map the common DCI to a portion of the PDCCH candidate of a second size associated with a second AL. As used herein, "mapping the common DCI" can refer to encoding and rate matching the DCI, and mapping the rate-matched bits to the REs of the PDCCH.

[0058] PDCCH candidates can be included in the CORESET. A PDCCH candidate can span a first region of the CORESET (corresponding to the portion of the PDCCH candidate mapped to by the public DCI) and a second region of the CORESET (corresponding to the remaining portion of the PDCCH candidate excluding the PDCCH candidate portion). In other words, the first region can have a size corresponding to the second size, and the second region can have a size corresponding to the difference between the first and second sizes. In the first example, the size of the first region can be 16 CCEs, and the size of the second region can be 8 CCEs. In the second example, the size of the first region can be 8 CCEs, and the size of the second region can also be 4 CCEs.

[0059] The transmitted PDCCH is indicated by reference numeral 420. As shown, the transmitted PDCCH can be associated with a first AL (e.g., 24 CCEs or 16 CCEs in both examples). As further shown, a portion of the PDCCH can be associated with a second AL (e.g., 16 CCEs or 8 CCEs in both examples). It can be seen that the portion of the PDCCH is included in the PDCCH candidate carrying the PDCCH. As described above, the BS can map the DCI to the PDCCH (at the first AL) and a portion of the PDCCH (at the second AL). Therefore, the first UE can detect and decode the common DCI at the first AL, and the second UE can detect and decode the common DCI from the portion of the PDCCH at the second AL. For a more detailed description of the technique for mapping the common DCI to the PDCCH, please refer to [link to relevant documentation]. Figure 5 and Figure 6 Explanation.

[0060] In some aspects, the BS can map the public DCI at least in part based on the starting CCE index. The starting CCE index defines the first CCE in the set of CCEs to which the DCI is to be mapped. In some aspects, the starting CCE index for the first aggregation level (e.g., a larger aggregation level) can be an integer multiple of the second aggregation level (e.g., a smaller aggregation level). For example, the starting CCE index for a PDCCH candidate can be an integer multiple of the number of CCEs at the second aggregation level. As a more specific example, when the first AL is 12 and the second AL is 8, possible starting CCE indices for the PDCCH candidate include 0, 8, 16, and so on.

[0061] In some aspects, the BS can map the public DCI based at least in part on the maximum allowed starting CCE index of the PDCCH candidate. In some aspects, for a CORESET with N CCEs, the maximum allowed starting CCE of the PDCCH candidate is at least in part based on the floor function of (N divided by the number of CCEs in the second AL) minus 2 multiplied by the number of CCEs in the second AL. If one or more CCEs of the PDCCH candidate appear outside the CORESET when using the maximum allowed starting CCE, one or more CCEs can be mapped starting from the initial CCE of the CORESET. For example, consider a CORESET with N... CCE N CCEs CCE =N), L AL (e.g., the number of CCEs in the first AL) The first AL and L ′ AL (e.g., the number of CCEs in the second AL) is the CORESET of the second AL. In this case, the largest starting CCE index is determined by... Defined, and having this largest starting CCE index, a PDCCH candidate can wrap around the initial CCE index of the CORESET (e.g., CCE#0). Continuing this example, for L AL =12 and L ′ AL =8 PDCCH candidates, in a CORESET with 32 CCEs, the maximum allowed starting CCE index is CCE#24, and the associated PDCCH candidates have already surrounded the resource with CCE#{24, 25, ..., 31, 0, 1, 2, 3}.

[0062] In some respects, for a CORESET with N CCEs, the maximum allowed starting CCE for a PDCCH candidate is at least partially based on the floor of (N divided by the number of CCEs in the second AL) minus 2 multiplied by the number of CCEs in the second AL. For example, this formula can be used if ((N divided by the number of CCEs in the second AL minus 1), multiplied by the number of CCEs in the second AL) plus the number of CCEs in the first AL is greater than N. For example, consider a CORESET with N CCE N CCEs CCE =N), L AL (e.g., the number of CCEs in the first AL) The first AL and L ′ AL (e.g., the number of CCEs in the second AL) of the second AL's CORESET. In this case, if The largest starting CCE index is then determined by Definition. Continuing this example, for L... AL =12 and L ′ AL With 8 PDCCH candidates, in a CORESET with 32 CCEs, the maximum allowed starting CCE index is CCE#16, and no wrap is required.

[0063] In some aspects, the public DCI can carry the remaining minimum system information (RMSI). The RMSI is carried in System Information Block 1 (SIB1) and can transmit cell selection information, Public Land Mobile Network Identifier (PLMN), Tracking Area Code (TAC), cell identifier, Radio Access Network (RAN) notification information, System Information Scheduling Information (OSI) for other system information, serving cell information, etc. In some aspects, for RMSI PDCCH monitoring, for a given first AL and a given second AL, there may be the same maximum allowed number of PDCCH candidates. For example, ALs of 8 and 12 can be associated with the same maximum number of RMSI (e.g., SIB1) PDCCH monitoring candidates. As another example, ALs of 16 and 24 can be associated with the same maximum number of RMSI (e.g., SIB1) PDCCH monitoring candidates.

[0064] As shown in the figure, both the first UE and the second UE can receive the PDCCH. As indicated by reference numeral 430, the first UE can detect the PDCCH and decode the DCI at the first AL. Therefore, the PDCCH is detectable in the first AL (corresponding to the entire PDCCH candidate), providing improved coverage for the first UE. This can be particularly beneficial for RedCap UEs, UEs associated with poor coverage, etc. As indicated by reference numeral 440, the second UE can detect a portion of the PDCCH and decode the DCI at the second AL. Therefore, this portion of the PDCCH is detectable in the second AL (corresponding to the portion of the PDCCH candidate), providing compatibility with UEs that cannot or are not configured to operate in the first AL. This can be particularly beneficial for UEs such as eMBB UEs, URLLC UEs, V2X UEs, etc., which may not support ALs such as 24 and 16.

[0065] As indicated by reference numeral 450 in the accompanying drawings, the first UE, the second UE, and / or the base station may communicate at least partially based on a common DCI. For example, such communication may involve system information (e.g., the UE may receive system information via the common DCI and perform actions indicated by the system information, such as receiving subsequent communication on scheduled resources), paging (e.g., the UE may receive a paging message via the common DCI, and if the paging message is directed to the UE, it may wake up at a subsequent time to receive communication), initial access (e.g., the UE may receive initial access information via the common DCI and perform an initial access procedure based on the initial access information), and so on. It should be noted that the common DCI may carry information different from or other than the information explicitly described above.

[0066] In some respects, the first UE, the second UE, and / or the BS may rate match the PDSCH at least in part based on the common DCI (or may determine that the PDSCH is rate matched). For a more detailed description of the determination of whether rate matching of the PDSCH is at least in part based on the common DCI, please refer to [link to relevant documentation]. Figure 7 and Figure 8 Explanation.

[0067] As mentioned above, Figure 4 Provided as an example. Other examples may be related to... Figure 4 The descriptions are different.

[0068] Figure 5 and Figure 6 These are diagrams illustrating examples 500 and 600 of mapping DCI to PDCCH and portions of PDCCH according to various aspects of this disclosure. Examples 500 and 600 illustrate BS (e.g., Figure 4The BS 110 can perform mappings from the common DCI to the PDCCH and a portion of the PDCCH to make the common DCI compatible with UEs using different ALs. Example 500 is shown as option 1, and example 600 is shown as option 2. In examples 500 and 600, a portion of the PDCCH (corresponding to the first region of the aforementioned CORESET) is shown as subPDCCH1, and the remaining portion of the PDCCH (corresponding to the second region of the aforementioned CORESET) is shown as subPDCCH2. SubPDCCH1 may correspond to the second AL, and the combined size of subPDCCH1 and subPDCCH2 may correspond to the first AL. In examples 500 and 600, the first AL (e.g., the number of CCEs in the first AL) is determined by L AL This indicates that the second AL (e.g., the number of CCEs in the second AL) is represented by L. ′ AL As shown in the figure, subPDCCH1 includes CCE#0 (e.g., the initial CCE) to CCE#(L). ′ AL -1 (due to zero index), and subPDCCH2 includes CCE#L ′ AL To CCE#(L AL -1).

[0069] Examples 500 and 600 involve rate matching. Rate matching includes one or more operations that match multiple coded bits of the common DCI with multiple payload REs of the PDCCH. For example, rate matching may include interleaving coded system bits and parity bits, bit merging, and pruning or bit repetition (depending on how many bits are to be rate matched and the number of resources for which the bits are to be rate matched). Rate matching can be performed at least in part based on a circular buffer. For example, the transmitter may feed coded and interleaved bits into a circular buffer (which may be referred to as a bit set) and may perform bit selection from the circular buffer. By selecting bits from the circular buffer at least in part based on the number of payload REs, the transmitter implements rate matching of the common DCI.

[0070] In Example 500, rate matching can be performed to match the total resources of the PDCCH. For example, the common DCI can be rate matched with the combined size of the first region of the CORESET and the second region of the CORESET (e.g., the number of REs included in 24 CCEs if the first AL is 24, or the number of REs included in 12 CCEs if the first AL is 12). Rate matching to match the total resources of the PDCCH is illustrated by the circular buffer shown in reference numeral 510, where bits mapped to subPDCCH1 and bits mapped to subPDCCH2 are buffered as part of the same rate matching operation (as indicated by the order of the arrows corresponding to subPDCCH1 and subPDCCH2). In this case, the rate-matched and encoded DCI can be mapped to subPDCCH1 and subPDCCH2 in turn. Reference numeral 520 shows the bit-to-RE mapping for Option 1. As shown by reference numerals 530, 540, 550 and 560 in the attached figures, the common DCI can be mapped in a frequency-first manner to the first symbol of subPDCCH1, then to the second symbol of subPDCCH1, then to the first symbol of subPDCCH2, and then to the second symbol of subPDCCH2.

[0071] Rate matching of the common DCI to the entire PDCCH allows UEs using a larger AL to perform soft combination of sub-PDCCH1 and sub-PDCCH2, thereby enabling PDCCH detection at the larger AL. Furthermore, mapping the common DCI first to sub-PDCCH1 and then to sub-PDCCH2 allows UEs using a smaller AL to detect the common DCI transmitted on the portion of the PDCCH candidate corresponding to sub-PDCCH2, thus providing common DCI compatibility between UEs using a larger AL and those using a smaller AL.

[0072] exist Figure 6In Example 600, rate matching can be performed separately on sub-PDCCH1 (e.g., a portion of the PDCCH candidates, a first region) and sub-PDCCH2 (e.g., the remainder of the PDCCH candidates excluding that portion, a second region). For example, the common DCI can be rate-matched to the size of sub-PDCCH1 and mapped to sub-PDCCH1, and can be rate-matched to the size of sub-PDCCH2 and mapped to sub-PDCCH2. In other words, the common PDCCH can be rate-matched and mapped to sub-PDCCH1 and sub-PDCCH2 respectively. The individual rate matching operations are illustrated by the circular buffer shown by reference numeral 610, where bits mapped to sub-PDCCH1 and bits mapped to sub-PDCCH2 are buffered as part of a separate rate matching operation (indicated by parallel or separate descriptions of arrows corresponding to sub-PDCCH1 and sub-PDCCH2). In this case, the rate-matched and encoded DCI can be mapped to sub-PDCCH1 and sub-PDCCH2 respectively.

[0073] Reference numeral 620 illustrates the bit-to-RE mapping of option 2. As shown by reference numerals 630 and 640, the common DCI can be mapped to the first and second symbols of sub-PDCCH1 in a frequency-priority manner. Furthermore, as shown by reference numerals 650 and 660, the common DCI can be mapped to the first and second symbols of sub-PDCCH2 in a frequency-priority manner. In some aspects, the operations shown by reference numerals 630 / 640 and 650 / 660 can be performed in parallel. For example, rate matching and / or bit-to-RE mapping can be performed simultaneously on sub-PDCCH1 and sub-PDCCH2.

[0074] In some respects, the encoding of the common DCI for sub-PDCCH1 and sub-PDCCH2 can use the same parent polar code. For example, in some radio access technologies, such as 5G / NR, the DCI can be encoded by polar coding before rate matching and bit-to-RE mapping. Polar coding can be at least partially based on the parent polar code. For example, a set of bits (e.g., associated with one or more additional cyclic redundancy checks (CRC)) can be input into a polar-coded block and can be polar-coded to the parent polar code block length. In the techniques described herein, the parent polar code block lengths of sub-PDCCH1 and sub-PDCCH2 can be determined at least partially based on the rate matching and coded bit length of sub-PDCCH1 (e.g., the first region of CORESET, a portion of the PDCCH candidate). For example, the parent polar code associated with the second region can be the same as the parent polar code associated with the first region.

[0075] Using the mother polar code of sub-PDCCH1 to polarize the common DCI enables UEs associated with a larger AL to perform soft combination of sub-PDCCH1 and sub-PDCCH2, thereby enabling PDCCH detection at the larger AL. Furthermore, the separate mapping of the common DCI to sub-PDCCH1 and sub-PDCCH2 allows UEs using a smaller AL to detect the common DCI transmitted on the portion of the PDCCH candidate corresponding to sub-PDCCH2, thus providing common DCI compatibility between UEs using a larger AL and those using a smaller AL.

[0076] As mentioned above, Figure 5 and Figure 6 Provided as an example. Other examples may be provided. Figure 5 and Figure 6 The descriptions differ from those in the text.

[0077] Figure 7 This is a diagram illustrating example 700 of determining the resources of the Physical Downlink Shared Channel (PDSCH) scheduled by the DCI according to various aspects of this disclosure. Figure 7 The PDSCH is shown (indicated by white padding). The PDSCH is scheduled by the DCI and is indicated by a curved arrow from the first PDCCH carrying the DCI to the PDSCH. The first PDCCH is sent in the first PDCCH candidate with a first aggregation level (e.g., a smaller aggregation level, such as 8 or 12). Furthermore, the second PDCCH corresponding to the second PDCCH candidate with a second aggregation level (e.g., a larger aggregation level, such as 16) is associated with the same starting CCE index as the first PDCCH candidate. Figure 7 The first and second PDCCHs can be sent in a non-interleaved coreset of a single symbol. In some respects, the DCI can be a common DCI, such as a combined DCI. Figure 3-6 As described.

[0078] Example 700 illustrates an example of a UE detecting a PDCCH with a smaller AL that schedules a PDSCH. For example, the UE may detect a PDCCH with AL of 12 that starts at the same CCE index as a PDCCH with AL of 16. In this case, the UE may consider the resource associated with the PDCCH with AL of 16 as unavailable for the PDSCH (indicated by "X" padding of the remainder of the PDCCH with AL of 16, also referred to herein as a second region carrying the CORESET of the PDCCH with AL of 16). For example, the UE may rate match the PDSCHs surrounding the resource associated with the PDCCH with AL of 16. In other words, if DCI schedules PDSCH, the UE monitors (and the BS can configure) a first PDCCH candidate (e.g., with ALs of 8 or 12) and a second PDCCH candidate (e.g., with ALs of 16) at least in part based on DCI transmitted in a non-interleaved and one symbol control resource set, and the second PDCCH candidate is associated with the same starting control channel element as the first PDCCH candidate and a higher aggregation level than the first PDCCH candidate, then the resources associated with the second PDCCH candidate are unavailable for the PDSCH. This technique can be combined with... Figure 3-6 The aforementioned PDCCH application (wherein combined with Figure 3-6 The described PDCCH is associated with either a first PDCCH candidate or a second PDCCH candidate. Furthermore, or alternatively, the first PDCCH candidate may carry the PDCCH, and the second PDCCH candidate may carry a portion of the PDCCH; both can be encoded using public DCI, such as by combining... Figure 3-6 As stated above.

[0079] As mentioned above, Figure 7 This is one example. Other examples may be similar. Figure 7 The descriptions differ from those in the text.

[0080] Figure 8 These are examples 800 and 805 illustrating the determination of resources for a PDSCH scheduled by a public DCI according to various aspects of this disclosure. Figure 8 The PDSCH is displayed (indicated by white fill). The PDSCH is scheduled by the common DCI, which is indicated by a curved arrow from the PDCCH carrying the DCI to the PDSCH. For example, according to... Figure 3-6 One or more techniques are described, in which public DCI can be mapped to a PDCCH candidate (associated with the first AL, e.g., shown as 24) and a subset of the PDCCH candidates (associated with the second AL, e.g., shown as 16).

[0081] In Example 800, the UE can monitor PDCCH candidates with a larger AL. In this case, the UE can first attempt to decode a portion of the PDCCH candidate with the same starting CCE index and a smaller AL (e.g., corresponding to...). Figure 5 and Figure 6 The PDCCH candidate portion of subPDCCH1, and AL 16 candidate in Example 800). If the UE detects PDCCH on the PDCCH candidate portion (e.g., if the UE successfully decodes PDCCH on the PDCCH candidate portion), and PDCCH schedules PDSCH, then in the first aspect ( Figure 8 (not shown in the image), the UE may assume resources associated with the remainder of the PDCCH candidate with a larger AL (e.g., ...). Figure 5 and Figure 6 The PDSCH (second region of the CORESET) is punctured for scheduling. For example, the UE can decode the common DCI on a portion of the PDSCH candidate. The UE can puncture the PDSCH scheduled by the common DCI at one or more resources associated with the remaining portion of the PDSCH candidate that is different from the PDSCH candidate. "Punching" can refer to discarding the RE of the scheduled PDSCH at the resource (e.g., instead of rate matching the PDSCH to include the RE of the scheduled PDSCH at the resource).

[0082] In a second aspect, as shown in Example 800, the UE may consider resources associated with the remainder of a PDCCH candidate having a larger AL as available for PDSCH. For example, the UE may decode the common DCI of a portion of the PDCCH candidate. The UE may, at least in part, consider one or more resources associated with the remainder of that portion of the PDCCH candidate that is different from the PDCCH candidate as available for PDSCH scheduled by the common DCI, based on the decoding of the common DCI on that portion of the PDCCH candidate.

[0083] Example 805 shows an example where CORESET does not overlap with PDSCH scheduled by PDCCH, so there is no need to perform punching or determination of PDSCH resource availability.

[0084] As mentioned above, Figure 8 This is one example. Other examples may be similar. Figure 8 The descriptions differ from those in the text.

[0085] Figure 9 This is a diagram illustrating, for example, an example process 900 performed by a UE according to various aspects of this disclosure. Example process 900 is an example of a UE (e.g., UE 120) performing operations associated with providing a backward-compatible common control channel.

[0086] like Figure 9 As shown, in some aspects, process 900 may include receiving a common DCI included in a PDCCH candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, and wherein said portion of the PDCCH candidate has a second size associated with the second aggregation level (block 910). For example, a UE (e.g., using receiving component 1102, such as...) Figure 11 (As shown) can receive a common DCI included in a PDCCH candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level, as described above. In some aspects, as described elsewhere herein, the first aggregation level is a larger aggregation level, and the second aggregation level is a smaller aggregation level.

[0087] like Figure 9 As further shown, in some aspects, process 900 may include communication at least partially based on a public DCI (block 920). For example, the UE (e.g., using...) Figure 11 The transmitting component 1104 or receiving component 1102 shown may communicate at least partially based on public DCI, as described above.

[0088] Process 900 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in combination with one or more other processes described elsewhere herein.

[0089] In the first aspect, the portion of the PDCCH candidate spans a first region of the CORESET, and the PDCCH candidate spans a first region and a second region in the CORESET, wherein the first region has a size corresponding to the second size, and the second region has a size corresponding to the difference between the first size and the second size.

[0090] In the second aspect, either alone or in combination with the first aspect, the common DCI is rate-matched with the merged size of the first and second regions, and the common DCI is sequentially mapped to the first region and the second region.

[0091] In the third aspect, either alone or in combination with one or more of the first and second aspects, the common DCI is matched and mapped to the first region by the size rate of the first region, and the common DCI is matched and mapped to the second region by the size rate of the second region.

[0092] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the mother polar code associated with the second region is the same as the mother polar code associated with the first region.

[0093] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the starting control channel element (CCE) index of the PDCCH candidate is an integer multiple of the number of CCEs in the second aggregation level.

[0094] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, for a control resource set with N CCEs, the maximum allowed starting CCE for a PDCCH candidate is at least partially based on the floor of (N divided by the number of CCEs in the second aggregation level) minus 1 multiplied by the number of CCEs in the second aggregation level.

[0095] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, if one or more CCEs of the PDCCH candidate appear outside the control resource set when using the maximum allowed starting CCE, then one or more CCEs are mapped starting from the initial CCE of the control resource set (e.g., CCE#0).

[0096] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, for a control resource set with N CCEs, the maximum allowed starting CCE for a PDCCH candidate is at least partially based on the floor of (N divided by the number of CCEs at the second aggregation level) minus 2 multiplied by the number of CCEs at the second aggregation level.

[0097] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, a common DCI schedules a physical downlink shared channel (PDSCH), a PDCCH candidate is a first PDCCH candidate, and process 900 further includes monitoring the first PDCCH candidate and a second PDCCH candidate based at least in part on a common DCI transmitted in a non-interleaved and one-symbol control resource set, wherein the second PDCCH candidate is associated with the same starting control channel element as the first PDCCH candidate and a higher aggregation level than the first PDCCH candidate, and wherein the resources associated with the second PDCCH candidate are not available for the PDSCH.

[0098] In the tenth aspect, alone or in combination with one or more of the first to ninth aspects, receiving the public DCI also includes decoding the public DCI on portions of the PDCCH candidate (e.g., using...). Figure 11 The detection / decoding component 1108), and at least in part based on the common DCI on the PDCCH candidate (e.g., using...). Figure 11 The receiving component 1102) treats one or more resources associated with the remainder of the PDCCH candidate that are different from the portion of the PDCCH candidate as physical downlink shared channels that can be used by the public DCI scheduling.

[0099] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, receiving the public DCI also includes decoding the public DCI on portions of the PDCCH candidate (e.g., using...). Figure 11 The detection / decoding component 1108), and the puncturing of the physical downlink shared channel scheduled by the common DCI at one or more resources associated with the remaining portion of the PDCCH candidate that is different from the PDCCH candidate portion (e.g., using the ...). Figure 11 (receiving component 1102).

[0100] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the public DCI is associated with the remaining minimum system information block, and the first aggregation level and the second aggregation level are associated with the same maximum allowed number of PDCCH candidates, at least in part, based on the association of the public DCI with the remaining minimum system information block.

[0101] although Figure 9 An example block of process 900 is shown, but in some respects, process 900 may include... Figure 9 The blocks shown may be more, fewer, different, or arranged differently than other blocks. Additionally or alternatively, two or more blocks of process 900 may be executed in parallel.

[0102] Figure 10 This is a diagram illustrating, for example, an example process 1000 performed by a base station according to various aspects of this disclosure. Example process 1000 is an example of a base station (e.g., base station 110) performing operations associated with encoding and transmitting a backward-compatible common control channel.

[0103] like Figure 10As shown, in some aspects, process 1000 may include mapping a common DCI to a PDCCH associated with a PDCCH candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, and wherein said portion of the PDCCH candidate has a second size associated with the second aggregation level (box 1010). For example, a base station (e.g., using encoding / mapping component 1208, such as...) Figure 12 As shown, a public DCI can be mapped to a PDCCH associated with a PDCCH candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the public DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, and wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level, as described above. In some aspects, the first aggregation level is a larger aggregation level, and the second aggregation level is a smaller aggregation level, as described elsewhere in this document.

[0104] like Figure 10 As further shown, in some aspects, process 1000 may include transmitting a public DCI (box 1020). For example, a base station (e.g., using...) Figure 12 The transmission component 1204 shown can transmit public DCI, as described above.

[0105] Process 1000 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in combination with one or more other processes described elsewhere herein.

[0106] In the first aspect, a portion of the PDCCH candidate spans a first region of the CORESET, and the PDCCH candidate spans a first region and a second region of the CORESET, wherein the first region has a size corresponding to a second size, and the second region has a size corresponding to the difference between the first size and the second size.

[0107] In the second aspect, either alone or in combination with the first aspect, the common DCI is rate-matched with the merged size of the first and second regions, and the common DCI is sequentially mapped to the first and second regions.

[0108] In the third aspect, either alone or in combination with one or more of the first and second aspects, the common DCI is matched and mapped to the first region by the size rate of the first region, and the common DCI is matched and mapped to the second region by the size rate of the second region.

[0109] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the mother polar code associated with the second region is the same as the mother polar code associated with the first region.

[0110] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the starting CCE index of the PDCCH candidate is an integer multiple of the number of CCEs at the second aggregation level.

[0111] In the sixth aspect, alone or in combination with one or more of the first to fifth aspects, for a control resource set with N CCEs, the maximum allowed starting CCE for PDCCH candidates is at least partially based on the floor of (N divided by the number of CCEs in the second aggregation level) minus 1.

[0112] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, if one or more CCEs of the PDCCH candidate appear outside the control resource set when using the maximum allowed starting CCE, then one or more CCEs are mapped starting from the initial CCE of the control resource set.

[0113] In the eighth aspect, alone or in combination with one or more of the first to seventh aspects, for a control resource set with N CCEs, the maximum allowed starting CCE for PDCCH candidates is at least partially based on the floor function of (N divided by the number of CCEs at the second aggregation level) minus 2.

[0114] In the ninth aspect, alone or in combination with one or more of the first to eighth aspects, a common DCI schedules a PDSCH, a PDCCH candidate is a first PDCCH candidate, and process 1000 further includes configuring (e.g., using transport component 1204) a second PDCCH candidate based at least in part on a common DCI transmitted in a non-interleaved and one symbol control resource set, wherein the second PDCCH candidate is associated with the same starting control channel element as the first PDCCH candidate and a higher aggregation level than the first PDCCH candidate, and wherein the resources associated with the second PDCCH candidate are not available for the PDSCH.

[0115] In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, if the common DCI is decoded on a portion of the PDCCH candidate, one or more resources associated with the remaining portion of the PDCCH candidate that is different from the portion of the PDCCH candidate are considered as physical downlink shared channels available for scheduling by the common DCI.

[0116] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, if the common DCI is decoded on a portion of the PDCCH candidate, one or more resources of the physical downlink shared channel scheduled by the common DCI are punctured at least in part based on said one or more resources associated with the remaining portion of the PDCCH candidate that is different from the portion of the PDCCH candidate.

[0117] In the twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, the public DCI is associated with the remaining minimum system information block, and the first aggregation level and the second aggregation level are associated with the same maximum allowed number of PDCCH candidates, at least in part, based on the association of the public DCI with the remaining minimum system information block.

[0118] In the thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the common DCI is mapped to be detectable at the first and second aggregation levels, based at least in part on the common DCI pointing to the reduced capability UE associated with the first aggregation level.

[0119] although Figure 10 An example block of process 1000 is shown, but in some respects, process 1000 may include... Figure 10 The blocks shown can be compared to more blocks, fewer blocks, different blocks, or blocks with different arrangements. Additionally or alternatively, two or more blocks of process 1000 can be executed in parallel.

[0120] Figure 11 This is a block diagram of an example device 1100 for wireless communication according to various aspects of this disclosure. Device 1100 may be a UE, or a UE may include device 1100. In some aspects, device 1100 includes a receiving component 1102 and a transmitting component 1104, which can communicate with each other (e.g., via a plurality of buses and / or one or more other components). As shown, device 1100 can use the receiving component 1102 and the transmitting component 1104 to communicate with another device 1106 (e.g., a UE, a base station, or another wireless communication device). As further shown, device 1100 may include a detection / decoding component 1108, etc. In some aspects, the detection / decoding component 1108 may include the above-described combination... Figure 2The UE is described in more detail below, including one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof.

[0121] In some respects, device 1100 can be configured to perform the functions described herein. Figure 3-8 One or more operations described herein. Additionally or alternatively, device 1100 may be configured to perform one or more processes described herein, such as... Figure 9 The process 900, or a combination thereof. In some respects, Figure 11 The device 1100 and / or one or more components shown may include the above-described combination. Figure 2 One or more components of the UE are described below in more detail. Additionally, or alternatively, Figure 11 One or more components shown can be combined above. Figure 2 The description is implemented within one or more components, and is described in more detail below. Additionally or alternatively, one or more components in this group may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and may be executed by a controller or processor to perform the component's function or operation.

[0122] Receiver 1102 may receive communications from device 1106, such as reference signals, control information, data communications, or combinations thereof. Receiver 1102 may provide the received communications to one or more other components of device 1100. In some aspects, receiver 1102 may perform signal processing on the received communications (e.g., filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) and may provide the processed signal to one or more other components of device 1106. In some aspects, receiver 1102 may include the above-described combinations. Figure 2 The UE is described and described in more detail below, including one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0123] Transmission component 1104 can send communications, such as reference signals, control information, data communications, or combinations thereof, to device 1106. In some aspects, one or more other components of device 1106 can generate communications and provide the generated communications to transmission component 1104 for transmission to device 1106. In some aspects, transmission component 1104 can perform signal processing (e.g., filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding) on ​​the generated communications and can send the processed signals to device 1106. In some aspects, transmission component 1104 may include the above-described combinations... Figure 2 The UE includes one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof, as described and described in more detail below. In some aspects, the transmit component 1104 may be co-located with the receive component 1102 in a transceiver.

[0124] The receiving component 1102 can receive a common DCI included in a PDCCH candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level. The transmitting component 1104 or the receiving component 1102 can communicate at least partially based on the common DCI.

[0125] As described above, device 1100 may be or may be included in a UE such as UE 120. The UE may include, for example... Figure 2Various components are shown and described in detail herein. On the downlink, at UE 120, antennas 252a to 252r can receive downlink signals from base station 110 and / or other base stations and can provide the received signals to demodulators (DEMODs) 254a to 254r respectively. Each demodulator 254 can adjust (e.g., filter, amplify, down-convert, and digitize) the received signal to obtain an input sample. Each demodulator 254 can further process the input sample (e.g., for OFDM) to obtain a received symbol. MIMO detector 256 can obtain the received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols, and provide the detected symbols, if applicable. Receive processor 258 can process (e.g., demodulate and decode) the detected symbols, provide the decoded data of UE 120 to data sink 260, and provide the decoded control information and system information to controller / processor 280. The term "controller / processor" can refer to one or more controllers, one or more processors, or a combination thereof. The channel processor can determine parameters such as the Reference Signal Received Power (RSRP), Received Signal Strength Indicator (RSSI), Reference Signal Received Quality (RSRQ), and / or Channel Quality Indicator (CQI). In some aspects, one or more components of the UE 120 may be included in the housing 284.

[0126] On the uplink, at UE 120, the transmitting processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reporting RSRP, RSSI, RSRQ, and / or CQI). The transmitting processor 264 can also generate reference symbols for one or more reference signals. Symbols from the transmitting processor 264 can be pre-encoded (if applicable) by TX MIMO processor 266, further processed by modulators 254a to 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 254) of UE 120 can be included in the modem of UE 120. In some aspects, UE 120 includes a transceiver. The transceiver may include any combination of an antenna 252, a modulator and / or demodulator 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, and / or a TX MIMO processor 266. The transceiver may be used by a processor (e.g., a controller / processor 280) and a memory 282 to perform aspects of any of the methods described herein, for example, as referenced. Figure 3-10 As stated above.

[0127] UE 120 may be included within a housing that houses components of UE 120, such as processor components and / or memory components. In some aspects, the processor components and memory components may be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0128] In some respects, two or more UE 120 (e.g., in Figure 1 The UEs 120a and 120e shown herein may communicate directly using one or more sidelink channels (e.g., without using base station 110 as a medium for communication with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols or vehicle-to-infrastructure (V2I) protocols) and / or mesh networks. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0129] UE 120's controller / processor 280 and / or Figure 2 Any other components of UE 120 may perform one or more technologies associated with backward-compatible common control channels, as described in more detail elsewhere herein. For example, the controller / processor 280 of UE 120 and / or Figure 2 Any other component can execute or direct, for example Figure 9 The operation of process 900 and / or other processes described herein. Memory 282 may store data and program code for UE 120. In some aspects, memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, when executed by one or more processors of UE 120 (e.g., direct execution, or execution after compilation, transformation, and / or interpretation), one or more instructions may cause one or more processors and / or UE 120 to perform or direct, for example... Figure 9 The operation of process 900 and / or other processes described herein. In some aspects, the execution instructions may include run instructions, translation instructions, compilation instructions, and / or interpretation instructions, etc.

[0130] In some aspects, the UE includes elements for receiving common downlink control information (DCI) included in a physical downlink control channel (PDCCH) candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate; and wherein a portion of the PDCCH candidate has a second size associated with the second aggregation level; or elements for communicating at least partially based on the common DCI. Elements for the user equipment (UE) to perform the operations described herein may include one or more of, for example, antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280, or memory 282.

[0131] Figure 11 The number and arrangement of components shown are provided as an example. In practice, with... Figure 11 Compared to the components shown, there may be additional components, fewer components, different components, or components arranged differently. Furthermore, Figure 11 The two or more components shown can be implemented within a single component, or Figure 11 The single component shown can be implemented as multiple distributed components. Furthermore, or alternatively, Figure 11 The set (one or more) components shown can perform one or more functions, which are described as being performed by... Figure 11 The other set of components described herein will be executed.

[0132] Figure 12 This is a block diagram of an example device 1200 for wireless communication according to various aspects of this disclosure. Device 1200 may be a base station, or a base station may include device 1200. In some aspects, device 1200 includes a receiving component 1202 and a transmitting component 1204, which can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 1200 can use the receiving component 1202 and the transmitting component 1204 to communicate with another device 1206 (e.g., a UE, a base station, or another wireless communication device). As further shown, device 1200 may include an encoding / mapping component 1208, etc. In some aspects, the encoding / mapping component 1208 may include the above-described combination... Figure 2 And one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memories, or combinations thereof of the base station, as described in more detail below.

[0133] In some respects, device 1200 can be configured to perform the functions described herein. Figure 3-8 One or more operations described herein. Additionally, or alternatively, the device 1200 may be configured to perform one or more processes described herein, such as... Figure 10 The process 1000, or a combination thereof. In some respects, Figure 12 The device 1200 and / or one or more components shown may include the above-described combination. Figure 2 One or more components of the base station are described below in more detail. Additionally, or alternatively, Figure 12 One or more components shown can be combined above. Figure 2 Implemented within one or more components described and further described below in more detail. Additionally or alternatively, one or more of the components in this group may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and may be executed by a controller or processor to perform the component's function or operation.

[0134] Receiver 1202 may receive communications from device 1206, such as reference signals, control information, data communications, or combinations thereof. Receiver 1202 may provide the received communications to one or more other components of device 1200. In some aspects, receiver 1202 may perform signal processing on the received communications (e.g., filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) and may provide the processed signal to one or more other components of device 1206. In some aspects, receiver 1202 may include the above-described combinations... Figure 2 One or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memories, or combinations thereof are described in more detail below for a base station.

[0135] The transmission component 1204 can send communications, such as reference signals, control information, data communications, or combinations thereof, to the device 1206. In some aspects, one or more other components of the device 1206 can generate communications and provide the generated communications to the transmission component 1204 for transmission to the device 1206. In some aspects, the transmission component 1204 can perform signal processing (e.g., filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding) on ​​the generated communications and can send the processed signals to the device 1206. In some aspects, the transmission component 1204 may include the above-described combinations... Figure 2The described base station includes one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller / processor, a memory, or a combination thereof. In some aspects, the transmit component 1204 may be co-located with the receive component 1202 in a transceiver.

[0136] Encoding / mapping component 1208 can map a common DCI to a PDCCH associated with a PDCCH candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level. Transmission component 1204 can transmit the common DCI.

[0137] As described above, device 1200 may be or may be included in a base station, such as base station 110. The base station may include various components, such as... Figure 2 As shown and described in detail here. On the downlink, at base station 110, transmit processor 220 can receive data for one or more UEs from data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQI) received from the UE, process (e.g., code and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. Transmit processor 220 can also process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper-layer signaling), and provide overhead symbols and control symbols. Transmit processor 220 can also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding, if applicable) on data symbols, control symbols, overhead symbols, and / or reference symbols, and can provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 can process its own output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t can be transmitted via T antennas 234a to 234t, respectively.

[0138] On the uplink, at base station 110, uplink signals from UE 120 and other UEs can be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236 (if applicable), and further processed by receiver processor 238 to obtain decoded data and control information transmitted by UE 120. Receiver processor 238 can provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and communicate with network controller 130 via communication unit 244. Base station 110 may include scheduler 246 for scheduling downlink and / or uplink communications of UE 120. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 232) of base station 110 may be included in the modem of base station 110. In some aspects, base station 110 includes a transceiver. The transceiver may include any combination of antenna 234, modulator and / or demodulator 232, MIMO detector 236, receiver processor 238, transmitter processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein, for example, as referenced. Figure 3-10 As stated above.

[0139] The controller / processor 240 of base station 110 and / or Figure 2 Any other component may perform one or more techniques associated with backward-compatible common control channels, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110 and / or Figure 2 Any other component can execute or direct, for example Figure 10 The operation of process 1000 and / or other processes described herein. Memory 242 may store data and program code for base station 110. In some aspects, memory 242 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, when executed by one or more processors of base station 110 (e.g., direct execution, or execution after compilation, transformation, and / or interpretation), one or more instructions may cause one or more processors, UE 120, and / or base station 110 to perform or direct, for example... Figure 10 The operation of process 1000 and / or other processes described herein. In some aspects, the execution instructions may include run instructions, translation instructions, compilation instructions, and / or interpretation instructions, etc.

[0140] In some aspects, the base station includes elements for mapping common downlink control information (DCI) to a physical downlink control channel (PDCCH) associated with a PDCCH candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level; or elements for transmitting the common DCI. Elements for the base station to perform the operations described herein may include, for example, one or more of a transmit processor 220, a TX MIMO processor 230, a modulator 232, an antenna 234, a demodulator 232, a MIMO detector 236, a receive processor 238, a controller / processor 240, a memory 242, or a scheduler 246.

[0141] Figure 12 The number and arrangement of components shown are provided as an example. In practice, with Figure 12 Compared to the components shown, there may be additional components, fewer components, different components, or components arranged differently. Furthermore, Figure 12 The two or more components shown can be implemented within a single component, or Figure 12 The single component described herein can be implemented as multiple distributed components. Furthermore, or alternatively, Figure 12 The set (one or more) components shown can perform one or more functions, which are described as being performed by... Figure 12 The other set of components described herein will be executed.

[0142] The following provides an overview of some aspects of this disclosure:

[0143] Aspect 1: A wireless communication method performed by a user equipment (UE), comprising: receiving common downlink control information (DCI) included in a physical downlink control channel (PDCCH) candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level; and communicating at least in part based on the common DCI.

[0144] Aspect 2: According to the method of aspect 1, wherein the portion of the PDCCH candidate spans a first region of a control resource set (CORESET), and the PDCCH candidate spans a first region and a second region of the CORESET, wherein the first region has a size corresponding to a second size, and the second region has a size corresponding to the difference between the first size and the second size.

[0145] Aspect 3: According to the method of aspect 2, wherein the common DCI is matched with the merge size rate of the first region and the second region, and wherein the common DCI is sequentially mapped to the first region and the second region.

[0146] Aspect 4: According to the method of aspect 2, wherein the public DCI is matched and mapped to the first region with the size rate of the first region, and the public DCI is matched and mapped to the second region with the size rate of the second region.

[0147] Aspect 5: According to the method of aspect 4, the mother polar code associated with the second region is the same as the mother polar code associated with the first region.

[0148] Aspect 6: The method according to any one of Aspects 1-5, wherein the starting control channel element (CCE) index of the PDCCH candidate is an integer multiple of the number of CCEs in the second aggregation level.

[0149] Aspect 7: The method according to any one of Aspects 1-6, wherein, for a control resource set having N control channel elements (CCEs), the maximum allowed starting CCE of the PDCCH candidate is at least partially based on the floor of (N divided by the number of CCEs in the second aggregation level) minus 1, and then multiplied by the number of CCEs in the second aggregation level.

[0150] Aspect 8: According to the method of aspect 7, wherein if one or more CCEs of the PDCCH candidate appear outside the control resource set when using the maximum allowed starting CCE, then one or more CCEs are mapped starting from the initial CCE of the control resource set.

[0151] Aspect 9: The method according to any one of Aspects 1-6, wherein, for a control resource set having N control channel elements (CCEs), the maximum allowed starting CCE of the PDCCH candidate is at least partially based on the floor of (N divided by the number of CCEs in the second aggregation level) minus 2, multiplied by the number of CCEs in the second aggregation level.

[0152] Aspect 10: The method according to any one of Aspects 1-9, wherein the common DCI schedules the Physical Downlink Shared Channel (PDSCH), the PDCCH candidate is a first PDCCH candidate, and the method further comprises: monitoring the first PDCCH candidate and the second PDCCH candidate at least in part based on the common DCI transmitted in a non-interleaved and one symbol control resource set, wherein the second PDCCH candidate is associated with the same starting control channel element as the first PDCCH candidate and a higher aggregation level than the first PDCCH candidate, and wherein the resources associated with the second PDCCH candidate are not available for the PDSCH.

[0153] Aspect 11: The method according to any one of Aspects 1-10, wherein receiving the public DCI further comprises: decoding the public DCI on a portion of the PDCCH candidate, and at least in part based on decoding the public DCI on a portion of the PDCCH candidate, treating one or more resources associated with the remaining portion of the PDCCH candidate that is different from the portion of the PDCCH candidate as physical downlink shared channels available for scheduling by the public DCI.

[0154] Aspect 12: The method according to any one of Aspects 1-10, wherein receiving the public DCI further comprises: decoding the public DCI on a portion of the PDCCH candidate, and puncturing the physical downlink shared channel scheduled by the public DCI at one or more resources associated with the remaining portion of the PDCCH candidate that is different from the portion of the PDCCH candidate.

[0155] Aspect 13: The method according to any one of Aspects 1-12, wherein the public DCI is associated with the remaining minimum system information block, and wherein, based at least in part on the association of the public DCI with the remaining minimum system information block, the first aggregation level and the second aggregation level are associated with the same maximum allowed number of PDCCH candidates.

[0156] Aspect 14: A wireless communication method performed by a base station, comprising: mapping common downlink control information (DCI) to a physical downlink control channel (PDCCH) associated with a PDCCH candidate, wherein the PDCCH candidate has a first size associated with a first aggregation level, wherein the common DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level; and transmitting the common DCI.

[0157] Aspect 15: According to the method of aspect 14, wherein the portion of the PDCCH candidate spans a first region of a control resource set (CORESET), and the PDCCH candidate spans a first region and a second region of the CORESET, wherein the first region has a size corresponding to a second size, and the second region has a size corresponding to the difference between the first size and the second size.

[0158] Aspect 16: According to the method of aspect 15, wherein the common DCI is matched with the merge size rate of the first region and the second region, and wherein the common DCI is sequentially mapped to the first region and the second region.

[0159] Aspect 17: According to the method of aspect 15, wherein the public DCI is matched and mapped to the first region with a size rate of the first region, and the public DCI is matched and mapped to the second region with a size rate of the second region.

[0160] Aspect 18: According to the method of aspect 17, the mother polar code associated with the second region is the same as the mother polar code associated with the first region.

[0161] Aspect 19: The method according to any one of Aspects 14-18, wherein the starting control channel element (CCE) index of the PDCCH candidate is an integer multiple of the number of CCEs in the second aggregation level.

[0162] Aspect 20: The method according to any one of Aspects 14-19, wherein, for a control resource set having N control channel elements (CCEs), the maximum allowed starting CCE of the PDCCH candidate is at least partially based on the floor function of (N divided by the number of CCEs in the second aggregation level) minus 1.

[0163] Aspect 21: According to the method of aspect 20, wherein if one or more CCEs of the PDCCH candidate appear outside the control resource set when using the maximum allowed starting CCE, then one or more CCEs are mapped starting from the initial CCE of the control resource set.

[0164] Aspect 22: The method according to any one of Aspects 14-21, wherein, for a control resource set having N control channel elements (CCEs), the maximum allowed starting CCE of the PDCCH candidate is at least partially based on the floor function of (N divided by the number of CCEs in the second aggregation level) minus 2.

[0165] Aspect 23: The method according to any one of aspects 14-22, wherein the common DCI schedules a physical downlink shared channel (PDSCH), the PDCCH candidate is a first PDCCH candidate, and the method further comprises: configuring a second PDCCH candidate based at least in part on a common DCI transmitted in a non-interleaved and one symbol control resource set, wherein the second PDCCH candidate is associated with the same starting control channel element as the first PDCCH candidate and a higher aggregation level than the first PDCCH candidate, and wherein the resources associated with the second PDCCH candidate are not available for the PDSCH.

[0166] Aspect 24: The method according to any one of Aspects 14-23, wherein if the common DCI is decoded on the portion of the PDCCH candidate, one or more resources associated with the remaining portion of the PDCCH candidate that is different from the portion of the PDCCH candidate are considered as physical downlink shared channels available for scheduling by the common DCI.

[0167] Aspect 25: The method according to any one of Aspects 14-23, wherein if a common DCI is decoded on a portion of a PDCCH candidate, one or more resources of a physical downlink shared channel scheduled by the common DCI are punctured at least in part based on said one or more resources associated with the remainder of a PDCCH candidate that is different from a portion of the PDCCH candidate.

[0168] Aspect 26: The method according to any one of Aspects 14-25, wherein the public DCI is associated with the remaining minimum system information block, and wherein the first aggregation level and the second aggregation level are associated with the same maximum allowed number of PDCCH candidates, at least in part based on the association of the public DCI with the remaining minimum system information block.

[0169] Aspect 27: A method of any one of Aspects 14-26, wherein the public DCI is mapped to be detectable at both the first and second aggregation levels, at least in part based on the public DCI being directed to a degraded user equipment associated with the first aggregation level.

[0170] Aspect 28: An apparatus for wireless communication at a device, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform one or more aspects of aspects 1-13.

[0171] Aspect 29: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the methods of one or more aspects of aspects 1-13.

[0172] Aspect 30: An apparatus for wireless communication, comprising at least one unit for performing the methods of one or more aspects of aspects 1-13.

[0173] Aspect 31: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform methods of one or more aspects of aspects 1-13.

[0174] Aspect 32: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions, which, when executed by one or more processors of a device, cause the device to perform one or more aspects of aspects 1-13.

[0175] Aspect 33: An apparatus for wireless communication at a device, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform one or more of the methods of aspects 14-27.

[0176] Aspect 34: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the methods of one or more aspects of aspects 14-27.

[0177] Aspect 35: An apparatus for wireless communication, comprising at least one unit for performing the methods of one or more aspects of aspects 14-27.

[0178] Aspect 36: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform methods of one or more aspects of aspects 14-27.

[0179] Aspect 37: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform one or more aspects of aspects 14-27.

[0180] The foregoing disclosure provides illustrations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations can be made based on the foregoing disclosure, or from practice in the various aspects.

[0181] It should be noted that while the terms commonly associated with 5G or NR radio access technology (RAT) may be used to describe the aspects herein, the aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT and / or RATs after 5G (e.g., 6G).

[0182] Devices in a wireless network (such as Wireless Network 100) can communicate using the electromagnetic spectrum, which can be subdivided into various categories, bands, channels, etc., based on frequency or wavelength. For example, devices in Wireless Network 100 can communicate using an operating band with a first frequency range (FR1), which spans from 410 MHz to 7.125 GHz, and / or can communicate using an operating band with a second frequency range (FR2), which spans from 24.25 GHz to 52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred to as intermediate frequency (IF) bands. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as the “sub-6 GHz” band. Similarly, FR2 is often referred to as the “millimeter wave” band, although this differs from the ultra-high frequency (EHF) band (30 GHz–300 GHz) recognized as a “millimeter wave” band by the International Telecommunication Union (ITU). Therefore, unless otherwise specified, it should be understood that the terms "sub-6 GHz," etc., if used herein, can broadly refer to frequencies less than 6 GHz, frequencies within FR1, and / or intermediate frequency band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise specified, it should be understood that the terms "millimeter wave," etc., if used herein, can broadly refer to frequencies within the EHF band, frequencies within FR2, and / or intermediate frequency band frequencies (e.g., less than 24.25 GHz). It is conceivable that the frequencies included in FR1 and FR2 can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0183] As used herein, the term "component" is intended to be broadly interpreted as hardware and / or a combination of hardware and software. "Software" should be interpreted broadly as instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, application programs, software applications, packages, routines, subroutines, objects, executable files, threads of execution, procedures and / or functions, and other examples, whether referring to software, firmware, middleware, microcode, hardware description languages, or other languages. As used herein, processors are implemented in hardware and / or a combination of hardware and software. It is evident that the systems and / or methods described herein can be implemented in various forms of hardware and / or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit these aspects. Therefore, since the operation and behavior of systems and / or methods are described herein without reference to specific software code, it should be understood that software and hardware can be designed to implement systems and / or methods, at least in part, based on the descriptions herein.

[0184] As used in this article, depending on the context, a threshold can refer to a value that is greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0185] Even if specific combinations of features are listed in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of aspects. In fact, many of these features can be combined in ways not specifically listed in the claims and / or not disclosed in the specification. Although each dependent claim listed below may directly depend on only one claim, the disclosure of aspects includes combinations of each dependent claim with every other claim in the claim set. As used herein, the phrase “at least one” in the list of items refers to any combination of these items, including single members. For example, “at least one of a, b, or c” is intended to cover a, b, c, ab, ac, bc, and abc, as well as any combination with multiples of the same element (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0186] Unless explicitly stated otherwise, no element, action, or instruction used herein should be construed as critical or necessary. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and are interchangeable with “one or more.” Furthermore, as used herein, “the” is intended to include one or more items associated with the article “the” and is interchangeable with “one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, or a combination of related and unrelated items) and are interchangeable with “one or more.” If only one item is intended to be used, the phrase “only one” or similar language is used. Furthermore, as used herein, the terms “have,” “have,” “possess,” etc., are intended to be open-ended terms. Furthermore, unless explicitly stated otherwise, the word “based on” means “at least partially based on.” Furthermore, as used herein, the term “or” is inclusive when used in a series and is interchangeable with “and / or” unless explicitly stated otherwise (e.g., if used in combination with “any” or “only one”).

Claims

1. A method for wireless communication performed by a user equipment (UE), comprising: Receive common downlink control information (DCI) included in the physical downlink control channel (PDCCH) candidates; as well as Communication is at least partially based on the aforementioned public DCI. Wherein, the PDCCH candidate has a first size associated with a first aggregation level, wherein the public DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, and wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level; and in: The PDCCH candidate spans a first region and a second region of the control resource set (CORESET), wherein the portion of the PDCCH candidate spans the first region of the CORESET, wherein the first region has a size corresponding to the second size, and the second region has a size corresponding to the difference between the first size and the second size; or The starting control channel element (CCE) index of the PDCCH candidate is an integer multiple of the number of CCEs in the second aggregation level.

2. The method according to claim 1, wherein, The common DCI is matched with the merge size rate of the first region and the second region, and wherein the common DCI is sequentially mapped to the first region and the second region.

3. The method according to claim 1, wherein, The public DCI is matched and mapped to the first region by its size rate, and the public DCI is matched and mapped to the second region by its size rate.

4. The method according to claim 3, wherein, The mother polar code associated with the second region is the same as the mother polar code associated with the first region.

5. The method according to claim 1, wherein, The common DCI schedules the physical downlink shared channel (PDSCH), the PDCCH candidate is the first PDCCH candidate, and the method further includes: The first PDCCH candidate and the second PDCCH candidate are monitored at least in part based on the common DCI transmitted in a non-interleaved and symbol control resource set, wherein the second PDCCH candidate is associated with the same starting control channel element as the first PDCCH candidate and a higher aggregation level than the first PDCCH candidate, and wherein the resources associated with the second PDCCH candidate are not available for the PDSCH.

6. The method according to claim 1, wherein, Receiving the public DCI also includes: Decode the common DCI on the portion of the PDCCH candidate; and Based at least in part on decoding the common DCI on the portion of the PDCCH candidate, one or more resources associated with the remaining portion of the PDCCH candidate that is different from the portion of the PDCCH candidate are regarded as physical downlink shared channels that can be used for scheduling by the common DCI.

7. The method according to claim 1, wherein, Receiving the public DCI also includes: Decode the common DCI on the portion of the PDCCH candidate; and Puncture the physical downlink shared channel scheduled by the public DCI at one or more resources associated with the remaining portion of the PDCCH candidate that is different from the portion of the PDCCH candidate.

8. The method according to claim 1, wherein, The public DCI is associated with the remaining minimum system information block, and wherein, at least in part based on the association of the public DCI with the remaining minimum system information block, the first aggregation level and the second aggregation level are associated with the same maximum allowed number of PDCCH candidates.

9. A method for wireless communication performed by a user equipment (UE), comprising: Receive common downlink control information (DCI) included in the physical downlink control channel (PDCCH) candidates; as well as Communication is at least partially based on the aforementioned public DCI. Wherein, the PDCCH candidate has a first size associated with a first aggregation level, wherein the public DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, and wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level; and For a control resource set with N control channel elements (CCEs), the maximum allowed starting CCE for the PDCCH candidate is at least partially based on a number that is rounded down to 1 or 2 (N divided by the number of CCEs in the second aggregation level) and then multiplied by the number of CCEs in the second aggregation level.

10. The method according to claim 9, wherein, The number is 1.

11. The method according to claim 10, wherein, If one or more of the PDCCH candidate CCEs appear outside the control resource set when using the maximum allowed starting CCE, then the one or more CCEs are mapped starting from the initial CCE of the control resource set.

12. The method according to claim 9, wherein, The number is 2.

13. A user equipment (UE) for wireless communication, comprising at least one memory coupled to one or more processors, wherein, The one or more processors are configured to cause the UE to perform the following operations: Receive common downlink control information (DCI) included in the Physical Downlink Control Channel (PDCCH) candidates; and Communication is at least partially based on the aforementioned public DCI. Wherein, the PDCCH candidate has a first size associated with a first aggregation level, wherein the public DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, and wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level; and in: The PDCCH candidate spans a first region and a second region of the control resource set (CORESET), wherein the portion of the PDCCH candidate spans the first region of the CORESET, wherein the first region has a size corresponding to the second size, and the second region has a size corresponding to the difference between the first size and the second size; or The starting control channel element (CCE) index of the PDCCH candidate is an integer multiple of the number of CCEs in the second aggregation level.

14. The UE according to claim 13, wherein, The common DCI is matched with the merge size rate of the first region and the second region, and wherein the common DCI is sequentially mapped to the first region and the second region.

15. The UE according to claim 13, wherein, The public DCI is matched and mapped to the first region by its size rate, and the public DCI is matched and mapped to the second region by its size rate.

16. The UE according to claim 15, wherein, The mother polar code associated with the second region is the same as the mother polar code associated with the first region.

17. The UE according to claim 13, wherein, The common DCI schedules the physical downlink shared channel (PDSCH), the PDCCH candidate is the first PDCCH candidate, and the one or more processors are configured to cause the UE to perform the following operations: The first PDCCH candidate and the second PDCCH candidate are monitored at least in part based on the common DCI transmitted in a non-interleaved and symbol control resource set, wherein the second PDCCH candidate is associated with the same starting control channel element as the first PDCCH candidate and a higher aggregation level than the first PDCCH candidate, and wherein the resources associated with the second PDCCH candidate are not available for the PDSCH.

18. The UE according to claim 13, wherein, In order to receive the public DCI, the one or more processors are configured to cause the UE to perform the following operations: Decode the common DCI on the portion of the PDCCH candidate; as well as Based at least in part on decoding the common DCI on the portion of the PDCCH candidate, one or more resources associated with the remaining portion of the PDCCH candidate that is different from the portion of the PDCCH candidate are regarded as physical downlink shared channels that can be used for scheduling by the common DCI.

19. The UE according to claim 13, wherein, In order to receive the public DCI, the one or more processors are configured to cause the UE to perform the following operations: Decode the common DCI on the portion of the PDCCH candidate; as well as Puncture the physical downlink shared channel scheduled by the public DCI at one or more resources associated with the remaining portion of the PDCCH candidate that is different from the portion of the PDCCH candidate.

20. The UE according to claim 13, wherein, The public DCI is associated with the remaining minimum system information block, and wherein, at least in part based on the association of the public DCI with the remaining minimum system information block, the first aggregation level and the second aggregation level are associated with the same maximum allowed number of PDCCH candidates.

21. A user equipment (UE) for wireless communication, comprising at least one memory coupled to one or more processors, wherein, The one or more processors are configured to cause the UE to perform the following operations: Receive common downlink control information (DCI) included in the Physical Downlink Control Channel (PDCCH) candidates; and Communication is at least partially based on the aforementioned public DCI. Wherein, the PDCCH candidate has a first size associated with a first aggregation level, wherein the public DCI is detectable at the first aggregation level by decoding the PDCCH candidate, and detectable at a second aggregation level smaller than the first aggregation level by decoding a portion of the PDCCH candidate, and wherein the portion of the PDCCH candidate has a second size associated with the second aggregation level; and For a control resource set with N control channel elements (CCEs), the maximum allowed starting CCE for the PDCCH candidate is at least partially based on a number that is rounded down to 1 or 2 (N divided by the number of CCEs in the second aggregation level) and then multiplied by the number of CCEs in the second aggregation level.

22. The UE according to claim 21, wherein, The number is 1.

23. The UE according to claim 22, wherein, If one or more of the PDCCH candidate CCEs appear outside the control resource set when using the maximum allowed starting CCE, then the one or more CCEs are mapped starting from the initial CCE of the control resource set.

24. The UE according to claim 21, wherein, The number is 2.

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