Blind decoding for multiple downlink control information

Abstract

Some aspects relate to a carrier aggregation wireless system with a user equipment (UE). The UE can generate a report about UE capabilities supporting a first downlink control information (DCI) in a first DCI format for a cell of a plurality of cells of a wireless system and a second DCI in a second DCI format for the cell, and reporting of UE capabilities to support segmentation of a BD / CCE budget between performing blind decoding (BD) on a control channel element (CCE) of the first DCI carrying the first DCI format (BD / CCE) and performing BD on a CCE of the second DCI carrying the second DCI format. The first DCI in the first DCI format can schedule data transmission of a group of multiple cells. The UE may perform BD on a CCE of a first DCI carrying a first DCI format, and perform BD on a CCE of a second DCI carrying a second DCI format.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. non-provisional application No. 18 / 537,042, filed on December 12, 2023, which claims the benefit of U.S. provisional application No. 63 / 444,758, filed on February 10, 2023, the contents of both applications being incorporated herein by reference in their entirety. Background Art Technical Field

[0003] The described aspects generally relate to wireless communications, including supporting blind decoding (BD) of control channel elements (CCEs) scheduled for multiple downlink control information (DCI) for carrier aggregation (CA) wireless systems (BD / CCE).

[0004] Related fields

[0005] Wireless communication systems may include fifth-generation (5G) systems, new radio (NR) systems, long-term evolution (LTE) systems, non-terrestrial wireless networks (NTNs), combinations thereof, or some other wireless systems. Furthermore, wireless communication systems may support a wide range of use cases, such as enhanced mobile broadband (eMBB), massive machine-type communications (mMTC), ultra-reliable and low-latency communications (URLLC), enhanced vehicle-to-everything communications (eV2X), and the like. Carrier aggregation (CA) wireless systems may include multiple transmit / receive points (TRPs) or base stations located in multiple cells of the wireless system that communicate with user equipment (UE). Downlink control information (DCI) may be used to schedule data transmissions. Efficiency may be desired in DCI scheduling. Summary of the Invention

[0006] Some aspects of the present disclosure relate to apparatuses and methods for enabling UE capabilities to support first downlink control information (DCI) in a first DCI format for a cell in a plurality of cells of a carrier aggregation (CA) wireless system and second DCI in a second DCI format for the cell. The first DCI in the first DCI format may schedule data transmission for a group of a plurality of cells in the plurality of cells of the CA wireless system. The UE may perform blind decoding (BD) (BD / CCE) on a control channel element (CCE) carrying the first DCI in the first DCI format and perform BD on a CCE carrying the second DCI in the second DCI format. The UE may also split the BD / CCE budget between performing BD on the CCE carrying the first DCI and performing BD on the CCE carrying the second DCI.

[0007] Some aspects of the present disclosure relate to a UE. The UE may include a transceiver and a processor communicatively coupled to the transceiver. The transceiver may be configured to implement wireless communications in a CA wireless system having multiple cells. The processor of the UE may generate a report on the UE's ability to support splitting the BD / CCE budget between performing BD on a CCE carrying a first DCI in a first DCI format and performing BD on a CCE carrying a second DCI in a second DCI format. The first DCI format may indicate that the first DCI is configured to schedule data transmission for a group of multiple cells in a plurality of cells of the CA wireless system via the first DCI. In some embodiments, the second DCI format may include cross-carrier scheduling (CCS) DCI or self-scheduling DCI. The processor may also send a report to a base station.

[0008] In some embodiments, the processor may further configure the UE to perform blind decoding on a first number of CCEs carrying the first DCI and to perform blind decoding on a second number of CCEs carrying the second DCI, wherein the first number of CCEs and the second number of CCEs are determined by the base station based on a splitting factor and a BD / CCE budget. In some embodiments, the splitting factor may be included in the UE capabilities reported by the UE and received by the base station. In some embodiments, the splitting factor may be determined by the base station and not included in the UE capabilities reported by the UE. The sum of the first number of CCEs and the second number of CCEs may be equal to the BD / CCE budget and less than or equal to a predetermined CCE limit.

[0009] In some embodiments, the processor may further monitor a first group of CCE candidates corresponding to the first DCI to perform blind decoding until the first number of CCEs carrying the first DCI have been blind decoded, and monitor a second group of CCE candidates corresponding to the second DCI to perform blind decoding until the second number of CCEs carrying the second DCI have been blind decoded. In some embodiments, the first group of CCE candidates may be assigned to search space set (SSS) indices {1, 2, 3} associated with the first DCI format, and the second group of CCE candidates may be assigned to SSS indices {4, 5, 6} associated with the second DCI format. In some embodiments, after the first number of CCEs carrying the first DCI have been blind decoded, the processor may further monitor only the second group of CCE candidates corresponding to the second DCI to perform blind decoding until the second number of CCEs carrying the second DCI have been blind decoded. Similarly, after the second number of CCEs carrying the second DCI have been blind decoded, the processor may further monitor only the first group of CCE candidates corresponding to the first DCI to perform blind decoding until the first number of CCEs carrying the first DCI have been blind decoded.

[0010] Some aspects of the present disclosure relate to a method performed by a UE. The UE may transmit a report indicating whether the UE is capable of supporting a first DCI in a first DCI format for a cell in a plurality of cells of a carrier-attached (CA) wireless system and a second DCI in a second DCI format for the cell. The first DCI format may indicate that the first DCI is configured to schedule data transmission for a group of the plurality of cells of the wireless system, and the second DCI may include a cross-carrier scheduling (CCS) DCI.

[0011] In some embodiments, the report may indicate that the UE has the capability to support the first DCI and the second DCI for all cells configured for the UE, including the cell. In some embodiments, the cell is the first cell and the report is the first report, and the UE may also send a second report indicating whether the UE has the capability for a second cell among the multiple cells of the CA wireless system.

[0012] In some embodiments, when the UE has the capability to support both the first DCI and the second DCI, the UE may be configured to support the first DCI in the first DCI format and the second DCI in the second DCI format. The UE may also monitor a first set of CCE candidates corresponding to the first DCI to perform blind decoding on a first number of CCEs carrying the first DCI, and monitor a second set of CCE candidates corresponding to the second DCI to perform blind decoding on a second number of CCEs carrying the second DCI. The sum of the first number of CCEs and the second number of CCEs may be less than or equal to a predetermined CCE limit.

[0013] In some embodiments, the UE may be configured to support the first DCI and the second DCI via a single CCS information element (IE), wherein the CCS IE may include a parameter for indicating whether the first DCI in the first DCI format is supported for the cell. In some embodiments, the UE may be configured to support the first DCI in the first DCI format via a first IE, and to support the second DCI in the second DCI format via a second IE different from the first IE.

[0014] In some embodiments, the UE may send a report to indicate the UE's additional capability of allowing scheduling of the cell via a first DCI for scheduling only the cell without simultaneously scheduling any additional cells.Thus, the UE may determine the first DCI received by decoding the first number of CCEs as a valid DCI.

[0015] In some embodiments, the report may indicate that the UE does not have the capability to support the first DCI and the second DCI. Accordingly, the UE may monitor a first set of CCE candidates corresponding to the first DCI to perform blind decoding on a first number of CCEs to receive the first DCI, wherein the first DCI is configured to schedule data transmission only for the cell.

[0016] This disclosure is provided for the purpose of illustrating some aspects only, so as to provide an understanding of the subject matter described herein. Therefore, the above features are merely examples and should not be construed as narrowing the scope or essence of the subject matter in this disclosure. Other features, aspects, and advantages of the present disclosure will become apparent from the following detailed description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and enable one skilled in the relevant art to make and use the present disclosure.

[0018] Figure 1 A wireless system for performing blind decoding of a first downlink control information (DCI) format and a second downlink control information (DCI) format according to some aspects of the present disclosure is illustrated.

[0019] Figure 2 A block diagram illustrating a UE for performing the functions described herein according to some aspects of the present disclosure is illustrated.

[0020] Figure 3 Illustrated are example procedures performed by a UE to perform blind decoding on first DCI in a first DCI format and second DCI in a second DCI format according to some aspects of the present disclosure.

[0021] Figure 4 Illustrated are example procedures performed by a UE to perform blind decoding on first DCI in a first DCI format and second DCI in a second DCI format according to some aspects of the present disclosure.

[0022] Figure 5 is an example computer system for implementing some aspects or portions of the disclosure provided herein.

[0023] The present disclosure is described with reference to the accompanying drawings. In the drawings, generally, like reference numerals indicate identical or functionally similar elements. Additionally, generally, the leftmost digit of a reference numeral identifies the drawing in which the reference numeral first appears. DETAILED DESCRIPTION

[0024] In a wireless system, a user equipment (UE) can send and receive data on one or more component carriers (CCs) using coordinated multi-point transmission or carrier aggregation (CA). In a traditional cellular network, a UE is connected to only a single transmit receive point (TRP) or base station at a time, and each base station makes independent scheduling, precoding, and resource allocation decisions. For a CA wireless system, multiple TRPs or base stations collaborate and coordinate their transmissions so that the UE can receive transmissions from multiple base stations simultaneously, thereby increasing the UE's throughput. For example, a UE can simultaneously communicate with a first base station (e.g., a primary cell (PCell), a first component carrier) and a second base station (e.g., a secondary cell (SCell), a second component carrier). Additionally or alternatively, a single base station may include multiple cells (e.g., both a PCell and a SCell, or multiple component carriers), where the UE communicates with two or more cells on a single base station simultaneously. The wireless system can operate in various frequency ranges, such as frequency range 1 (FR1) in the range of 410 MHz to 7125 MHz and frequency range 2 (FR2) in the range of 24250 MHz to 52600 MHz.

[0025] In a wireless system, the physical downlink control channel (PDCCH) can carry downlink control information (DCI), which can include scheduling information for uplink (UL) or downlink (DL) data channels and other control information for UEs or UE groups. The UE can obtain control information by monitoring the control channel elements (CCEs) of a physical resource set (such as a control resource set (CORESET)) at a specified monitoring opportunity. The UE can obtain DCI by performing blind detection or blind decoding in a candidate set in a configured search space. The PDCCH can have a basic unit of CCE that includes multiple resource element groups (REGs). In some systems, DCI can be used to schedule data transmission for UEs in a single cell. Different types of DCI (such as multi-cell scheduling for physical downlink shared channel (PDSCH) / physical uplink shared channel (PUSCH)) can use a single DCI to schedule data transmission for UEs in multiple cells, which can be more efficient. However, how to support multiple DCI formats for UEs can be a challenge.

[0026] The embodiments herein propose a technique for supporting at least two different DCIs in two different DCI formats to perform different scheduling for a UE. For example, a DCI format may indicate that the DCI is configured to schedule data transmission for a group of multiple cells in a CA wireless system. In addition, the DCI format may indicate cross-carrier scheduling (CCS) DCI or self-scheduling DCI. The UE may have the ability to support a first DCI in a first DCI format for a cell in a CA wireless system and a second DCI in a second DCI format for the cell, wherein the first DCI format indicates that the first DCI is configured to schedule data transmission for a group of multiple cells in the wireless system, and the second DCI includes cross-carrier scheduling (CCS) DCI. In addition, the UE may have the ability to support splitting the BD / CCE budget between performing blind decoding (BD / CCE) on a CCE carrying a first DCI in a first DCI format and performing BD on a CCE carrying a second DCI in a second DCI format, wherein the first DCI format indicates that the first DCI is configured to schedule data transmission for a group of multiple cells via the first DCI. In some embodiments, the DCI may be used for both intra-band CA operation and inter-band CA operation, and for both FR1 and FR2. In some embodiments, a single DCI may be used for 3 or more cells for multi-cell PUSCH / PDSCH scheduling.

[0027] In some embodiments, the UE may obtain control information by monitoring the CCEs of the physical resource set at a specified monitoring opportunity, and perform blind detection or blind decoding in a candidate set in a configured search space. In some embodiments, the UE may perform blind decoding on a first number of CCEs carrying a first DCI, and perform blind decoding on a second number of CCEs carrying a second DCI, wherein the first number of CCEs and the second number of CCEs are determined by the base station based on a splitting factor and a BD / CCE budget. In some embodiments, the splitting factor may be included in the UE capabilities reported by the UE and received by the base station. In some embodiments, the splitting factor may be determined by the base station and not included in the UE capabilities reported by the UE. The sum of the first number of CCEs and the second number of CCEs may be equal to the BD / CCE budget and less than or equal to a predetermined CCE limit.

[0028] Figure 1A wireless system 100 is illustrated for performing blind decoding of first DCI in a first DCI format and second DCI in a second DCI format, in accordance with some aspects of the present disclosure. Wireless system 100 is provided for illustration purposes only and is not intended to limit the disclosed aspects. Wireless system 100 may include, but is not limited to, UE 101, base station 103, base station 105, and base station 107, all of which are communicatively coupled to core network 110. UE 101 communicates with base station 103 via communication link 121, with base station 105 via communication link 123, and with base station 107 via communication link 125. The base station may be a Transmission Relay Protocol (TRP). For example, base station 105 or base station 107 may be a TRP.

[0029] In some examples, wireless system 100 may include one or more of an NR system, an LTE system, a 5G system, or some other wireless system. Other network entities not shown may exist, such as a network controller, a relay station. Wireless system 100 may support a wide range of use cases, such as enhanced mobile broadband (eMBB), massive machine type communications (mMTC), ultra-reliable and low-latency communications (URLLC), and enhanced vehicle-to-everything communications (eV2X). System 100 may be a Carrier Access (CA) wireless system.

[0030] According to some aspects, base station 103, base station 105, and base station 107 can be fixed stations or mobile stations. Base station 103, base station 105, and base station 107 can also be referred to by other names, such as base transceiver system (BTS), access point (AP), TRP, evolved Node B (eNB), next generation Node B (gNB), 5G Node B (NB), or some other equivalent terminology. In some examples, base station 103 can be a gNB, and base station 105 and base station 107 can be gNB, eNB, or TRP. In some examples, base station 103, base station 105, and base station 107 can be interconnected with each other and / or interconnected to other base stations or network nodes in the network via various types of backhaul interfaces (not shown), such as direct physical connections, virtual networks, etc.

[0031] According to some aspects, UE 101 can be stationary or mobile. UE 101 can 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 desktop computer, a cordless phone, a wireless local loop station, a wireless sensor, a tablet computer, a camera, a video surveillance camera, a gaming device, a netbook, an ultrabook, a medical device or equipment, a biometric sensor or device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry such as a smart ring or smart bracelet), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component, a smart meter, industrial manufacturing equipment, a global positioning system device, an Internet of Things (IoT) device, a machine type communication (MTC) device, an evolved or enhanced machine type communication (eMTC) device, or any other suitable device configured to communicate via a wireless medium. For example, MTC and eMTC devices may include robots, drones, location tags, etc.

[0032] According to some aspects, base station 103, base station 105, and base station 107 may be communicatively coupled to core network 110. Base station 103 may serve cell 102, base station 105 may serve cell 104 contained within cell 102, and base station 107 may serve cell 106 contained within cell 102 and overlapping with cell 104. In some other embodiments, cell 102 may partially overlap with cell 104 or cell 106. Cells 102, 104, and 106 may be macrocells, picocells, femtocells, and / or another type of cell. In contrast, a macrocell may cover a relatively large geographic area, e.g., several kilometers in radius, a femtocell may cover a relatively small geographic area, e.g., a home, and a picocell may cover an area smaller than the area covered by a macrocell but larger than the area covered by a femtocell. For example, cell 102 may be a macrocell, while cells 104 and 106 may be picocells or femtocells. Furthermore, cell 102 may be a picocell, while cells 104 and 106 may be femtocells. In some examples, the geographic area of ​​a cell may move depending on the location of the mobile base station.

[0033] According to some aspects, base station 103 may be a serving base station, a primary node (PN), and cell 102 may be a serving cell or a primary cell (PCell). Base station 105 and base station 107 may be neighboring base stations for UE 101, which may be secondary nodes (SNs). Cell 104 and cell 106 may be secondary cells (SCells) or primary secondary cells (PScells). Additional secondary cells for UE 101 may exist, not shown. Data for UE 101 may be transmitted simultaneously between UE 101 and core network 110 via one or more component carriers between UE 101 and base station 103 at communication link 121, one or more component carriers between UE 101 and base station 105 at communication link 123, and one or more component carriers between UE 101 and base station 107 at communication link 125. UE 101 may communicate with a serving base station, such as base station 103, using a first frequency band and communicate with a neighboring base station, such as base station 105 or base station 107, using a second frequency band different from the first frequency band. In some embodiments, cell 102, being a PCell, may be referred to as an anchor cell, which provides a radio resource control (RRC) connection to UE 101. In some examples, the PCell (cell 102) and the SCell (e.g., cell 104) may be co-located (e.g., different TRPs are in the same location).

[0034] In some embodiments, one or more SCells in the SCell (such as cell 104 or cell 106) may be activated or added to cell 102 as a PCell to form a serving cell serving UE 101. Each serving cell corresponds to one or more CCs. The CC of a PCell (e.g., cell 102) may be referred to as a primary CC (PCC), and the CC of an SCell (e.g., cell 104 or cell 106) may be referred to as a secondary CC (SCC). The PCell (cell 102) and one or more SCells (cell 104 or cell 106) may be served by corresponding base stations 103, 105, and 107. The coverage of the PCell and the SCell may be different because component carriers in different frequency bands may experience different path losses. In some embodiments, the PCell (cell 102) may add or remove one or more SCells (cell 104 or cell 106) to improve the reliability of the connection to the UE 101 and / or increase the data rate.

[0035] According to some aspects, UE 101 may include a memory 112, a processor 114 communicatively coupled to the memory, and a transceiver, such as Figure 2 The memory 112 may be configured to store various data and operations described below.

[0036] In some embodiments, processor 114 may generate a report 132 of UE capabilities. In some embodiments, the UE capabilities may indicate that UE 101 can support splitting the BD / CCE budget 134 between performing BD on CCEs carrying first DCI 133 in a first DCI format and performing BD on CCEs carrying second DCI 131 in a second DCI format. The first DCI format may indicate that first DCI 131 is configured to schedule data transmission for a group of multiple cells in a plurality of cells of a CA wireless system via first DCI 131. For example, first DCI 131 may schedule data transmission for cell 104 and cell 106. In some embodiments, the second DCI format may include cross-carrier scheduling (CCS) DCI or self-scheduling DCI. For example, second DCI 133 may include CCSDCI to schedule cross-carrier data at cell 104 or schedule itself at cell 106. Processor 114 may also send report 132 to a base station (e.g., base station 103 or base station 107).

[0037] In some embodiments, processor 114 may further configure UE 101 to perform blind decoding on a first number of CCEs carrying first DCI 131 and to perform blind decoding on a second number of CCEs carrying second DCI 133, where the first number of CCEs and the second number of CCEs are determined by base station 103 based on a splitting factor (e.g., splitting factor 141 included in report 132) and a BD / CCE budget 134. In some embodiments, splitting factor 141 is included in UE capabilities reported by UE 101 and received by base station 103. In some embodiments, splitting factor 141 may be determined by the base station and not included in the UE capabilities reported by UE 101. In some embodiments, the sum of the first number of CCEs and the second number of CCEs may be equal to the BD / CCE budget 134 and less than or equal to a predetermined CCE limit 136.

[0038] In some embodiments, the processor 114 may also monitor a first set of CCE candidates corresponding to the first DCI 131 to perform blind decoding until the first number of CCEs carrying the first DCI 131 has been blind decoded. By performing blind decoding, the processor 114 may not have accurate information about the location of the DCI 131 within the search space where the first set of CCE candidates is located, may not have information about the structure of the DCI (such as the aggregation level), and may not have a scrambling code (such as a radio network temporary identifier (RNTI)). The processor 114 may have to determine the exact values ​​of the location (CCE index), structure, and scrambling code (RNTI) through trial and error, which is referred to as blind decoding. The processor 114 may also monitor a second set of CCE candidates corresponding to the second DCI 133 to perform blind decoding until the second number of CCEs carrying the second DCI 133 has been blind decoded. In some embodiments, the first group of CCE candidates may be assigned to search space set (SSS) indices {1, 2, 3} associated with the first DCI format, and the second group of CCE candidates may be assigned to SSS indices {4, 5, 6} associated with the second DCI format. In some embodiments, after the first number of CCEs carrying the first DCI 131 have been blind decoded, the processor 114 may also monitor only the second group of CCE candidates corresponding to the second DCI 133 to perform blind decoding until the second number of CCEs carrying the second DCI 133 have been blind decoded. Similarly, after the second number of CCEs carrying the second DCI 133 have been blind decoded, the processor 114 may also monitor only the first group of CCE candidates corresponding to the first DCI 131 to perform blind decoding until the first number of CCEs carrying the first DCI 131 have been blind decoded.

[0039] In some embodiments, UE 101 may send a report 132 to indicate whether UE 101 has the capability to support a first DCI 131 in a first DCI format for a cell, such as cell 106, and a second DCI 133 in a second DCI format for a cell, e.g., cell 106. The first DCI format may indicate that the first DCI 131 is configured to schedule data transmission for a group of multiple cells, such as cell 106, cell 104, and cell 102, of a wireless system, and the second DCI 131 may include a cross-carrier scheduling (CCS) DCI that may schedule only one cell, such as cell 104, with a cross-carrier, where the carrier in cell 104 is different from the carrier in cell 106.

[0040] In some embodiments, report 132 may indicate that UE 101 has the capability to support first DCI 131 and second DCI 133 for all cells configured for UE 101, such as cell 106, cell 104, and cell 102. In some embodiments, cell 106 is the first cell and report 132 is the first report, and UE 101 may also send a second report indicating whether UE 101 has the capability for a second cell, such as cell 104.

[0041] In some embodiments, when the UE 101 has the capability to support the first DCI 131 and the second DCI 133, the UE 101 may be configured to support the first DCI 131 in a first DCI format and the second DCI 133 in a second DCI format. The UE 101 may also monitor a first set of CCE candidates corresponding to the first DCI 131 to perform blind decoding on a first number of CCEs carrying the first DCI 131, and monitor a second set of CCE candidates corresponding to the second DCI 133 to perform blind decoding on a second number of CCEs carrying the second DCI 133. The sum of the first number of CCEs and the second number of CCEs may be less than or equal to a predetermined CCE limit 136. In some embodiments, the predetermined CCE limit 136 may be defined by system design and may be greater than the first number of CCEs and the second number of CCEs.

[0042] In some embodiments, the UE 101 may be configured to support the first DCI 131 and the second DCI 133 via a single CCS information element (IE) 135 received from the base station 103, wherein the CCS IE may include a parameter indicating whether the first DCI 131 in the first DCI format is supported for the cell. In some embodiments, the UE 101 may be configured to support the first DCI 131 in the first DCI format via a first IE 137 received from the base station 103, and to support the second DCI 133 in the second DCI format via a second IE 139 that is different from the first IE 137.

[0043] In some embodiments, UE 101 may send report 132 to indicate UE 101's additional capability of allowing scheduling of cell 106 via first DCI 131 for scheduling only cell 106 without simultaneously scheduling any additional cells. UE 101 may therefore determine that first DCI 131 received by decoding the first number of CCEs is a valid DCI.

[0044] In some embodiments, report 132 may indicate that UE 101 does not have the capability to support first DCI 131 and second DCI 133. Therefore, UE 101 may monitor a first set of CCE candidates corresponding to first DCI 131 to perform blind decoding on a first number of CCEs to receive first DCI 131, where first DCI 131 is configured to schedule data transmission only for the cell.

[0045] Figure 2 The block diagram illustrates a UE 101 having an antenna panel 217, which includes one or more antenna elements, such as antenna element 219, coupled to a transceiver 203 and controlled by a processor 114. Specifically, the transceiver 203 may include radio frequency (RF) circuitry 216, baseband transmit circuitry 212, and baseband receive circuitry 214. The RF circuitry 216 may include multiple parallel RF chains for one or more of transmit and receive functions, each RF chain connected to one or more antenna elements of the antenna panel. The transceiver 203 enables wireless communication between the UE 101 and base stations 103, 105, and 107 via the antenna panel 217. Furthermore, the processor 114 may be communicatively coupled to the memory 112, which is further coupled to the transceiver 203.

[0046] In some examples, RF circuit 216 is used by UE 101 to perform measurements of reference signals and to transmit and receive data in the serving cell. Memory 112 may store first DCI 131 and second DCI 133, report 132, CCS IE 135, first IE 137, second IE 139, predetermined CCE limit 136, split factor 141, and BD / CCE budget 134, as shown in FIG. Figure 1 Described in .

[0047] In some examples, memory 112 may include instructions that, when executed by processor 114, perform the functions described herein, including performing blind decoding of a first DCI in a first DCI format and a second DCI in a second DCI format. Alternatively, processor 114 may be "hard-coded" to perform the functions described herein, including performing blind decoding of a first DCI in a first DCI format and a second DCI in a second DCI format as described herein.

[0048] Figure 3 An example process 300 is illustrated for a UE to perform blind decoding of a first DCI in a first DCI format and a second DCI in a second DCI format according to some aspects of the present disclosure. The process 300 may be performed by Figures 1 to 2 UE 101 is shown performing.

[0049] At 302, UE 101 may generate a report 132 regarding UE capabilities for supporting BD / CCE budget splitting 134 between CCEs carrying first DCI 131 in a first DCI format and CCEs carrying second DCI 133 in a second DCI format. The first DCI format indicates that the first DCI 131 is configured to schedule data transmission for a group of multiple cells via the first DCI 131. In some embodiments, the first DCI format may be DCI format 0_X / 1_X, which may be a new DCI format for scheduling multi-cell data transmission and denoted as mcDCI. The first DCI format (mcDCI) may be different from a legacy DCI format, such as DCI format 0_0, format 0_1, format 1_0, format 1_1, format 2_0, format 2_1, format 2_2, format 2_3, format 2_4, format 2_5, format 2_6, format 3_0, format 3_1. The second DCI format may be a legacy DCI format.

[0050] At 304 , UE 101 may send report 132 to base station 103 or base station 107 .

[0051] At 306, UE 101 may be configured to perform blind decoding on a first number of CCEs carrying first DCI 131 and to perform blind decoding on a second number of CCEs carrying second DCI 133. The first number of CCEs and the second number of CCEs may be determined by base station 103 or another base station such as base station 107 based on splitting factor 141 and BD / CCE budget 134.

[0052] In some embodiments, UE 101 can report the splitting factors that UE 101 can support. If UE 101 does not report the ability to support the splitting factor, base station 103 can configure any combination of PDCCH / CCE candidates for mcDCI and legacy DCI formats. In some embodiments, the sum of PDCCH / CCE candidates for mcDCI and legacy DCI formats can be kept within the maximum BD / CCE limit for each cell, such as within the predetermined CCE limit 136. If the splitting factor is reported, base station 103 can still oversubscribe the PDCCH budget while taking into account the splitting factor and the total PDCCH budget.

[0053] In some embodiments, UE 101 may be configured to associate a first DCI format such as mcDCI with a search space such as SSS index 1, SSS index 2, SSS index 3, and also configured to associate a second DCI format such as a legacy DCI format with a search space having SSS index 4, SSS index 5, and SSS index 6.

[0054] At 308, UE 101 may monitor a first set of CCE candidates corresponding to the first DCI 131 to perform blind decoding until a first number of CCEs carrying the first DCI 131 have been blind decoded, and monitor a second set of CCE candidates corresponding to the second DCI 133 to perform blind decoding until a second number of CCEs carrying the second DCI 133 have been blind decoded.

[0055] In some embodiments, UE 101 may report split factor 141 as 0.75. Thus, 75% of the PDCCH / CCE budget limit 134 may be allocated to SSS indices {1, 2, 3} associated with mcDCI, and the remaining 25% of the PDCCH / CCE budget limit 134 may be allocated to SSS indices {4, 5, 6} associated with legacy DCI formats. When the limit of the allocated budget for mcDCI is reached when monitoring SSS index 1 and SSS index 3, UE 101 may skip monitoring PDCCH / CCE candidates corresponding to SSB index 1, SSB index 2, or SSB index 3, because these PDCCH / CCE candidates are associated with mcDCI and the allocated budget has been used. However, UE 101 may continue to monitor PDCCH / CCE candidates associated with SSB index 4, SSB index 5, or SSB index 6, because that budget corresponds solely to legacy DCI formats. Once the budget allocated for the legacy DCI format is reached, the UE 101 does not need to monitor the remaining PDCCH candidates as a legacy behavior.

[0056] Figure 4 An example process 400 is illustrated for a UE to perform blind decoding of a first DCI in a first DCI format and a second DCI in a second DCI format according to some aspects of the present disclosure. The process 400 may be performed by Figures 1 to 2 UE 101 is shown performing.

[0057] At 402, UE 101 may generate a report to indicate whether the UE has the capability to support first DCI 131 of a first DCI format for cell 106 and second DCI 133 of a second DCI format for cell 106. The first DCI format indicates that first DCI 131 may be configured to schedule data transmission for a group of multiple cells, such as an mcDCI format, and second DCI 133 may include CCS DCI. At 404, the UE may send the report to the base station.

[0058] If UE 101 reports the ability to support both multi-cell scheduling (such as mcDCI) and cross-carrier scheduling for cell 106 based on a single DCI, UE 101 may also report additional restrictions or capabilities, regardless of whether cell 106 can be individually scheduled by multi-cell scheduling based on a single DCI. In some embodiments, a single multi-cell scheduling DCI cannot individually schedule a given cell; instead, a single multi-cell scheduling DCI (mcDCI) should schedule multiple cells including cell 106 and at least one other cell (such as cell 104). In some embodiments, there may be a group of multiple cells (up to four) that can be scheduled by a single scheduling cell (cell 106) using a single DCI format as mcDCI. In the event that the UE capabilities include such additional restrictions, if the mcDCI only schedules one cell with a component carrier, such mcDCI scheduling will be invalid. Therefore, the first DCI 131 indicating the mcDCI format for scheduling only one cell will be invalid. Instead, the component carriers of the cell can be scheduled using the traditional DCI format. In some embodiments, the first DCI 131 in the mcDCI format can be used to schedule two different component carriers in two different cells. Therefore, depending on the reported additional capabilities of the UE 101, the first DCI 131 is a valid DCI. Consequently, BD / CCE operation can be counted within the budget or limit of the scheduled cell with CCS because the mcDCI contains scheduling information for such multiple cells. Without additional restrictions on scheduling multiple cells, BD / CCEs can always be counted within one cell configured by the base station 103, completing the BD / CCE counting for the mcDCI on that cell, leading to rapid depletion of the BD / CCE budget on one cell.

[0059] In some embodiments, the UE capability of supporting a first DCI 131 of a first DCI format for cell 106 and a second DCI 133 of a second DCI format for cell 106 may be reported on a per-cell basis or a per-UE basis. If the UE capability is reported on a per-cell basis, separate UE capabilities may be reported for each cell. If the UE capability is reported on a per-UE basis, the same capability may apply to all configured cells, such as cell 106, cell 104, and cell 102.

[0060] In some embodiments, if UE 101 reports that its capabilities do not support both single DCI-based multi-cell scheduling and CCS for a cell, cell 106 can be scheduled as just one cell through single DCI-based multi-cell scheduling. Thus, mcDCI scheduling can schedule a given cell individually.

[0061] At 406 , when the UE 101 has the capability to support both the first DCI and the second DCI, the UE may be configured to support the first DCI in the first DCI format and the second DCI in the second DCI format.

[0062] In some embodiments, the RRC configuration for multi-cell scheduling of UE 101 may include various options. In some embodiments, when CCS and multi-cell scheduling can be supported for a cell, UE 101 can be configured with both multi-cell scheduling and CCS configuration for the cell using the same IE. In one example, the CCS IE can be enhanced to include a parameter for indicating whether multi-cell scheduling is supported for the cell. A diagram of a configuration is shown in which Mcif-InSchedulingCell corresponding to a group of cells is proposed. The presence of this parameter can indicate to UE 101 that multi-cell scheduling is configured for the cell and the associated cell group based on the value of the mCIF. In another option, a new IE (similar to the CCS IE, but with mCIF) for multi-cell scheduling configuration can be configured to the UE.

[0063]

[0064] At 408, UE 101 may monitor a first set of control channel element (CCE) candidates corresponding to the first DCI to perform blind decoding on a first number of CCEs carrying the first DCI, and monitor a second set of CCE candidates corresponding to the second DCI to perform blind decoding on a second number of CCEs carrying the second DCI.

[0065] Various aspects may be implemented, for example, using one or more computer systems such as Figure 5 The computer system 500 shown in the figure can be implemented. The computer system 500 can be capable of performing the functions described herein to implement the Figures 3 and 4 Any computer, such as Figures 1 to 2 UE 101, base station 103, base station 105, or base station 107 in the computer system 500. The computer system 500 includes one or more processors (also known as central processing units or CPUs), such as processor 504. Processor 504 is connected to a communication infrastructure 506 (e.g., a bus). The computer system 500 also includes user input / output devices 503, such as a monitor, keyboard, pointing device, etc., which communicate with the communication infrastructure 506 through a user input / output interface 502. The computer system 500 also includes a main memory or primary storage 508, such as random access memory (RAM). The main memory 508 may include one or more levels of cache. The main memory 508 has stored therein control logic (e.g., computer software) and / or data.

[0066] The computer system 500 may also include one or more secondary storage devices or memories 510. The secondary storage 510 may include, for example, a hard drive 512 and / or a removable storage device or drive 514. The removable storage drive 514 may be a floppy disk drive, a tape drive, an optical drive, an optical storage device, a tape backup device, and / or any other storage device / drive.

[0067] The removable storage drive 514 can interact with a removable storage unit 518. The removable storage unit 518 includes a computer-usable or readable storage device having computer software (control logic) and / or data stored thereon. The removable storage unit 518 can be a floppy disk, a magnetic tape, an optical disk, a DVD, an optical storage disk, and / or any other computer data storage device. The removable storage drive 514 reads from and / or writes to the removable storage unit 518 in a well-known manner.

[0068] According to some aspects, secondary memory 510 may include other components, tools, or other methods for allowing computer system 500 to access computer programs and / or other instructions and / or data. Such components, tools, or other methods may include, for example, a removable storage unit 522 and an interface 520. Examples of removable storage unit 522 and interface 520 may include a program cartridge and a cartridge interface (such as that found in video game devices), a removable memory chip (such as an EPROM or PROM) and an associated socket, a memory stick and a USB port, a memory card and an associated memory card slot, and / or any other removable storage unit and associated interface.

[0069] In some examples, the main memory 508, the removable storage unit 518, and the removable storage unit 522 may store instructions that, when executed by the processor 504, cause the processor 504 to perform operations for a UE or a base station (e.g., Figures 1 to 2 101, base station 103, base station 105 or base station 107) to achieve the operation of Figures 3 and 4 The operations described by process 300 or process 400 shown in FIG.

[0070] The computer system 500 may also include a communication or network interface 524. The communication interface 524 enables the computer system 500 to communicate and interact with any combination of remote devices, remote networks, remote entities, etc. (individually and collectively referenced by reference numeral 528). For example, the communication interface 524 may allow the computer system 500 to communicate with the remote device 528 via a communication path 526, which may be wired and / or wireless and may include any combination of a LAN, a WAN, the Internet, etc. Control logic and / or data may be sent to and from the computer system 500 via the communication path 526. The operations of the communication interface 524 may be performed by a wireless controller and / or a cellular controller. The cellular controller may be a separate controller to manage communications based on different wireless communication technologies. The operations in the aforementioned aspects may be implemented in various configurations and architectures. Thus, some or all of the operations in the aforementioned aspects may be performed in hardware, software, or both. In some aspects, a tangible, non-transitory device or article of manufacture includes a tangible, non-transitory computer-usable or readable medium having control logic (software) stored thereon, also referred to herein as a computer program product or program storage device. This includes, but is not limited to, computer system 500, main memory 508, secondary memory 510, and removable storage units 518 and 522, as well as tangible articles of manufacture embodying any combination of the foregoing. Such control logic, when executed by one or more data processing devices (such as computer system 500), causes such data processing devices to operate as described herein.

[0071] Based on the teachings contained in this disclosure, it will be apparent to those skilled in the relevant art how to use Figure 5 Various aspects of the present disclosure may be implemented and used with data processing devices, computer systems, and / or computer architectures other than those shown. In particular, various aspects may operate with software, hardware, and / or operating system implementations other than those described herein.

[0072] It should be understood that the Detailed Description section, and not the Summary and Abstract sections, is intended to be used to interpret the claims. The Summary and Abstract sections may set forth one or more but not all exemplary aspects of the present disclosure as contemplated by the inventor(s), and thus, are not intended to limit the present disclosure or the appended claims in any way.

[0073] Although the present disclosure has been described herein with reference to exemplary aspects of exemplary fields and applications, it should be understood that the present disclosure is not limited thereto. Other aspects and modifications are possible and are within the scope and essence of the present disclosure. For example, and without limiting the generality of this paragraph, the various aspects are not limited to the software, hardware, firmware and / or entities illustrated in the figures and / or described herein. In addition, the various aspects (whether or not explicitly described herein) have significant practicality for fields and applications beyond the examples described herein.

[0074] Various aspects have been described herein with reference to functional building blocks illustrating specific implementations of specific functions and relationships thereof. For ease of description, the boundaries of these functional building blocks have been arbitrarily defined herein. Alternative boundaries may be defined so long as the specified functions and relationships (or their equivalents) are appropriately performed. Additionally, alternative aspects may perform functional blocks, steps, operations, methods, etc., in an order different from that described herein.

[0075] References herein to "one embodiment," "an embodiment," "an example embodiment," or similar phrases indicate that the described embodiment may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Furthermore, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is within the knowledge of those skilled in the relevant art to incorporate such feature, structure, or characteristic into other aspects, whether or not explicitly mentioned or described herein.

[0076] The breadth and scope of the present disclosure should not be limited by any of the above-described exemplary aspects, but should be defined only in accordance with the following claims and their equivalents.

[0077] For one or more embodiments or examples, at least one of the components described in one or more of the preceding figures may be configured to perform one or more operations, techniques, processes, and / or methods described below in the Examples section. For example, circuitry associated with a thread device, router, network element, or the like as described above in conjunction with one or more of the preceding figures may be configured to operate according to one or more of the examples set forth below in the Examples section.

[0078] This disclosure anticipates that entities responsible for the collection, analysis, disclosure, transfer, storage, or other use of such personal information will adhere to robust privacy policies and / or privacy practices. Specifically, such entities should implement and adhere to privacy policies and practices that are recognized as meeting or exceeding industry or government requirements for maintaining the privacy and security of personal information. Such policies should be easily accessible to users and updated as changes occur in the collection and / or use of data. Personal information from users should be collected for legitimate and reasonable entity purposes and should not be shared or sold outside of those legitimate purposes. Furthermore, such collection / sharing should only be done with the user's informed consent. Additionally, such entities should consider taking any necessary steps to protect and safeguard access to such personal information and ensure that other entities with access to personal information comply with the other entity's privacy policies and procedures. Furthermore, such entities may subject themselves to third-party assessments to demonstrate compliance with widely accepted privacy policies and practices. Furthermore, policies and practices should be tailored to the specific type of personal information being collected and / or accessed, as well as to applicable laws and standards, including jurisdictional considerations. For example, in the United States, the collection or access of certain health data may be governed by federal and / or state laws, such as the Health Insurance Portability and Accountability Act (HIPAA); whereas health data in other countries may be subject to other regulations and policies and should be handled accordingly. Therefore, different privacy measures should be advocated for different types of personal data in each country.

Claims

1. A user equipment (UE), comprising: a transceiver configured to implement wireless communications in a carrier aggregation (CA) wireless system having a plurality of cells; and a processor communicatively coupled to the transceiver and configured to: Generate information related to supporting performing blind decoding (BD) on a control channel element (CCE) carrying a first downlink control information (DCI) format. (BD / CCE) and reporting of a UE capability of performing BD / CCE budget splitting between BD and CCE on a CCE carrying a second DCI in a second DCI format, wherein the first DCI format indicates that the first DCI is configured to schedule data transmission of a group of the plurality of cells of the plurality of cells of the CA wireless system through the first DCI; sending the report to a base station; Configuring the UE to perform blind decoding on a first number of CCEs carrying the first DCI and to perform blind decoding on a second number of CCEs carrying the second DCI, wherein the first number of CCEs and the second number of CCEs are determined by the base station based on a splitting factor and the BD / CCE budget; and A first set of CCE candidates corresponding to the first DCI is monitored to perform blind decoding until the first number of CCEs carrying the first DCI have been blind decoded, and a second set of CCE candidates corresponding to the second DCI is monitored to perform blind decoding until the second number of CCEs carrying the second DCI have been blind decoded. 2 . The UE of claim 1 , wherein the splitting factor is included in the UE capabilities reported by the UE and received by the base station. 3 . The UE of claim 1 , wherein the splitting factor is determined by the base station and is not included in the UE capabilities reported by the UE. 4 . The UE of claim 1 , wherein a sum of the first number of CCEs and the second number of CCEs is equal to the BD / CCE budget and is less than or equal to a predetermined CCE limit.

5. The UE of claim 1 , wherein the first set of CCE candidates is assigned to search space set (SSS) indices {1, 2, 3} associated with the first DCI format, and the second set of CCE candidates is assigned to SSS indices {4, 5, 6} associated with the second DCI format. The UE of claim 1 , wherein the second DCI format comprises a cross-carrier scheduling (CCS) DCI or a self-scheduling DCI.

7. The UE according to claim 1, wherein the processor is further configured to: After the first number of CCEs carrying the first DCI have been blind decoded, monitoring only the second set of CCE candidates corresponding to the second DCI to perform blind decoding until the second number of CCEs carrying the second DCI have been blind decoded; and After the second number of CCEs carrying the second DCI have been blind decoded, only the first group of CCE candidates corresponding to the first DCI are monitored to perform blind decoding until the first number of CCEs carrying the first DCI have been blind decoded.

8. A method for a user equipment (UE), the method comprising: generating a report to indicate whether the UE has a capability to support a first downlink control information (DCI) in a first DCI format for a cell among a plurality of cells of a carrier aggregation (CA) wireless system and a second DCI in a second DCI format for the cell, wherein the first DCI format indicates that the first DCI is configured to schedule data transmission for a group of the plurality of cells of the wireless system and the second DCI includes a cross-carrier scheduling (CCS) DCI for a single cell; sending the report to a base station; When the UE has the capability of supporting both the first DCI and the second DCI, configuring the UE to support the first DCI in the first DCI format and the second DCI in the second DCI format; as well as A first set of control channel element (CCE) candidates corresponding to the first DCI is monitored to perform blind decoding on a first number of CCEs carrying the first DCI, and a second set of CCE candidates corresponding to the second DCI is monitored to perform blind decoding on a second number of CCEs carrying the second DCI.

9. The method according to claim 8, further comprising: sending the report to indicate the UE's additional capability of allowing scheduling of the cell by the first DCI for scheduling only the cell without simultaneously scheduling any additional cells; as well as The first DCI received by decoding the first number of CCEs is determined as valid DCI. 10 . The method of claim 8 , wherein the report indicates that the UE has the capability of supporting the first DCI and the second DCI for all cells configured for the UE including the cell.

11. The method of claim 8, wherein the cell is a first cell, the report is a first report, and sending the report further comprises: A second report is sent indicating whether the UE has the capability for a second cell of the plurality of cells of the CA wireless system.

12. The method of claim 8, wherein the report indicates that the UE does not have the capability to support the first DCI and the second DCI, and the method further comprises: The first group of CCE candidates corresponding to the first DCI is monitored to perform blind decoding on the first number of CCEs, thereby receiving the first DCI, wherein the first DCI is configured to schedule only data transmission for the cell.

13. The method of claim 8, wherein configuring the UE to support the first DCI and the second DCI comprises: The UE is configured to support the first DCI and the second DCI based on a single CCS Information Element (IE), wherein the single CCS IE includes a parameter for indicating whether the first DCI in the first DCI format is supported for the cell.

14. The method of claim 8, wherein configuring the UE to support the first DCI and the second DCI comprises: Configuring the UE to support the first DCI in the first DCI format based on a first information element (IE); as well as The UE is configured to support the second DCI of the second DCI format based on a second IE different from the first IE.

15. The method of claim 8, wherein a sum of the first number of CCEs and the second number of CCEs is less than or equal to a predetermined CCE limit.

16. A non-transitory computer-readable medium storing instructions that, when executed by a processor of a user equipment (UE), cause the UE to perform operations comprising: transmitting a report to indicate whether the UE has a capability to support a first downlink control information (DCI) in a first DCI format for a cell among a plurality of cells of a carrier aggregation (CA) wireless system and a second DCI in a second DCI format for the cell, wherein the first DCI format indicates that the first DCI is configured to schedule data transmission for a group of the plurality of cells of the wireless system, and the second DCI includes a cross-carrier scheduling (CCS) DCI; When the UE has the capability of supporting both the first DCI and the second DCI, configuring the UE to support the first DCI in the first DCI format and the second DCI in the second DCI format; as well as A first set of control channel element (CCE) candidates corresponding to the first DCI is monitored to perform blind decoding on a first number of CCEs carrying the first DCI, and a second set of CCE candidates corresponding to the second DCI is monitored to perform blind decoding on a second number of CCEs carrying the second DCI. 17 . The non-transitory computer-readable medium of claim 16 , wherein a sum of the first number of CCEs and the second number of CCEs is equal to the BD / CCE budget and is less than or equal to a predetermined CCE limit. 18 . The non-transitory computer-readable medium of claim 16 , wherein the report indicates that the UE has the capability to support the first DCI and the second DCI for all cells configured for the UE including the cell.

19. The non-transitory computer-readable medium of claim 16, wherein the cell is a first cell, the report is a first report, and sending the report further comprises: A second report is sent indicating whether the UE has the capability for a second cell of the plurality of cells of the CA wireless system.

20. The non-transitory computer-readable medium of claim 16, wherein the report indicates that the UE does not have the capability to support the first DCI and the second DCI, and the method further comprises: The first group of CCE candidates corresponding to the first DCI is monitored to perform blind decoding on the first number of CCEs, thereby receiving the first DCI, wherein the first DCI is configured to schedule only data transmission for the cell.

Images